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6758 lines
184 KiB
6758 lines
184 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Author(s)......: Holger Smolinski <[email protected]> |
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* Horst Hummel <[email protected]> |
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* Carsten Otte <[email protected]> |
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* Martin Schwidefsky <[email protected]> |
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* Bugreports.to..: <[email protected]> |
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* Copyright IBM Corp. 1999, 2009 |
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* EMC Symmetrix ioctl Copyright EMC Corporation, 2008 |
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* Author.........: Nigel Hislop <[email protected]> |
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*/ |
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#define KMSG_COMPONENT "dasd-eckd" |
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#include <linux/stddef.h> |
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#include <linux/kernel.h> |
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#include <linux/slab.h> |
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#include <linux/hdreg.h> /* HDIO_GETGEO */ |
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#include <linux/bio.h> |
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#include <linux/module.h> |
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#include <linux/compat.h> |
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#include <linux/init.h> |
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#include <linux/seq_file.h> |
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#include <asm/css_chars.h> |
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#include <asm/debug.h> |
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#include <asm/idals.h> |
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#include <asm/ebcdic.h> |
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#include <asm/io.h> |
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#include <linux/uaccess.h> |
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#include <asm/cio.h> |
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#include <asm/ccwdev.h> |
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#include <asm/itcw.h> |
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#include <asm/schid.h> |
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#include <asm/chpid.h> |
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#include "dasd_int.h" |
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#include "dasd_eckd.h" |
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#ifdef PRINTK_HEADER |
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#undef PRINTK_HEADER |
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#endif /* PRINTK_HEADER */ |
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#define PRINTK_HEADER "dasd(eckd):" |
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|
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/* |
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* raw track access always map to 64k in memory |
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* so it maps to 16 blocks of 4k per track |
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*/ |
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#define DASD_RAW_BLOCK_PER_TRACK 16 |
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#define DASD_RAW_BLOCKSIZE 4096 |
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/* 64k are 128 x 512 byte sectors */ |
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#define DASD_RAW_SECTORS_PER_TRACK 128 |
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MODULE_LICENSE("GPL"); |
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static struct dasd_discipline dasd_eckd_discipline; |
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/* The ccw bus type uses this table to find devices that it sends to |
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* dasd_eckd_probe */ |
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static struct ccw_device_id dasd_eckd_ids[] = { |
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{ CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, |
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{ CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, |
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{ CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, |
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{ CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, |
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{ CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, |
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{ CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, |
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{ CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, |
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{ CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, |
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{ CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, |
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{ CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, |
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{ /* end of list */ }, |
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}; |
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MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); |
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static struct ccw_driver dasd_eckd_driver; /* see below */ |
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static void *rawpadpage; |
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#define INIT_CQR_OK 0 |
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#define INIT_CQR_UNFORMATTED 1 |
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#define INIT_CQR_ERROR 2 |
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/* emergency request for reserve/release */ |
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static struct { |
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struct dasd_ccw_req cqr; |
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struct ccw1 ccw; |
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char data[32]; |
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} *dasd_reserve_req; |
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static DEFINE_MUTEX(dasd_reserve_mutex); |
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static struct { |
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struct dasd_ccw_req cqr; |
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struct ccw1 ccw[2]; |
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char data[40]; |
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} *dasd_vol_info_req; |
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static DEFINE_MUTEX(dasd_vol_info_mutex); |
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struct ext_pool_exhaust_work_data { |
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struct work_struct worker; |
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struct dasd_device *device; |
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struct dasd_device *base; |
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}; |
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/* definitions for the path verification worker */ |
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struct pe_handler_work_data { |
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struct work_struct worker; |
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struct dasd_device *device; |
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struct dasd_ccw_req cqr; |
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struct ccw1 ccw; |
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__u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; |
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int isglobal; |
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__u8 tbvpm; |
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__u8 fcsecpm; |
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}; |
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static struct pe_handler_work_data *pe_handler_worker; |
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static DEFINE_MUTEX(dasd_pe_handler_mutex); |
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struct check_attention_work_data { |
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struct work_struct worker; |
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struct dasd_device *device; |
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__u8 lpum; |
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}; |
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static int dasd_eckd_ext_pool_id(struct dasd_device *); |
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static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, |
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struct dasd_device *, struct dasd_device *, |
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unsigned int, int, unsigned int, unsigned int, |
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unsigned int, unsigned int); |
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/* initial attempt at a probe function. this can be simplified once |
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* the other detection code is gone */ |
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static int |
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dasd_eckd_probe (struct ccw_device *cdev) |
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{ |
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int ret; |
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/* set ECKD specific ccw-device options */ |
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ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | |
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CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); |
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if (ret) { |
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DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", |
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"dasd_eckd_probe: could not set " |
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"ccw-device options"); |
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return ret; |
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} |
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ret = dasd_generic_probe(cdev); |
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return ret; |
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} |
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static int |
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dasd_eckd_set_online(struct ccw_device *cdev) |
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{ |
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return dasd_generic_set_online(cdev, &dasd_eckd_discipline); |
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} |
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static const int sizes_trk0[] = { 28, 148, 84 }; |
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#define LABEL_SIZE 140 |
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/* head and record addresses of count_area read in analysis ccw */ |
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static const int count_area_head[] = { 0, 0, 0, 0, 1 }; |
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static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; |
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static inline unsigned int |
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ceil_quot(unsigned int d1, unsigned int d2) |
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{ |
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return (d1 + (d2 - 1)) / d2; |
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} |
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static unsigned int |
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recs_per_track(struct dasd_eckd_characteristics * rdc, |
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unsigned int kl, unsigned int dl) |
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{ |
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int dn, kn; |
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switch (rdc->dev_type) { |
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case 0x3380: |
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if (kl) |
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return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + |
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ceil_quot(dl + 12, 32)); |
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else |
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return 1499 / (15 + ceil_quot(dl + 12, 32)); |
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case 0x3390: |
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dn = ceil_quot(dl + 6, 232) + 1; |
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if (kl) { |
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kn = ceil_quot(kl + 6, 232) + 1; |
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return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + |
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9 + ceil_quot(dl + 6 * dn, 34)); |
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} else |
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return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); |
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case 0x9345: |
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dn = ceil_quot(dl + 6, 232) + 1; |
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if (kl) { |
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kn = ceil_quot(kl + 6, 232) + 1; |
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return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + |
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ceil_quot(dl + 6 * dn, 34)); |
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} else |
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return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); |
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} |
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return 0; |
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} |
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static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) |
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{ |
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geo->cyl = (__u16) cyl; |
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geo->head = cyl >> 16; |
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geo->head <<= 4; |
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geo->head |= head; |
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} |
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/* |
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* calculate failing track from sense data depending if |
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* it is an EAV device or not |
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*/ |
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static int dasd_eckd_track_from_irb(struct irb *irb, struct dasd_device *device, |
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sector_t *track) |
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{ |
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struct dasd_eckd_private *private = device->private; |
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u8 *sense = NULL; |
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u32 cyl; |
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u8 head; |
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sense = dasd_get_sense(irb); |
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if (!sense) { |
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DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
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"ESE error no sense data\n"); |
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return -EINVAL; |
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} |
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if (!(sense[27] & DASD_SENSE_BIT_2)) { |
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DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
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"ESE error no valid track data\n"); |
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return -EINVAL; |
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} |
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if (sense[27] & DASD_SENSE_BIT_3) { |
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/* enhanced addressing */ |
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cyl = sense[30] << 20; |
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cyl |= (sense[31] & 0xF0) << 12; |
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cyl |= sense[28] << 8; |
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cyl |= sense[29]; |
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} else { |
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cyl = sense[29] << 8; |
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cyl |= sense[30]; |
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} |
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head = sense[31] & 0x0F; |
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*track = cyl * private->rdc_data.trk_per_cyl + head; |
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return 0; |
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} |
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static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data, |
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struct dasd_device *device) |
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{ |
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struct dasd_eckd_private *private = device->private; |
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int rc; |
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rc = get_phys_clock(&data->ep_sys_time); |
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/* |
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* Ignore return code if XRC is not supported or |
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* sync clock is switched off |
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*/ |
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if ((rc && !private->rdc_data.facilities.XRC_supported) || |
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rc == -EOPNOTSUPP || rc == -EACCES) |
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return 0; |
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/* switch on System Time Stamp - needed for XRC Support */ |
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data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ |
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data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ |
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if (ccw) { |
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ccw->count = sizeof(struct DE_eckd_data); |
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ccw->flags |= CCW_FLAG_SLI; |
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} |
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return rc; |
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} |
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static int |
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define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, |
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unsigned int totrk, int cmd, struct dasd_device *device, |
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int blksize) |
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{ |
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struct dasd_eckd_private *private = device->private; |
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u16 heads, beghead, endhead; |
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u32 begcyl, endcyl; |
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int rc = 0; |
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if (ccw) { |
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ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; |
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ccw->flags = 0; |
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ccw->count = 16; |
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ccw->cda = (__u32)__pa(data); |
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} |
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memset(data, 0, sizeof(struct DE_eckd_data)); |
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switch (cmd) { |
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case DASD_ECKD_CCW_READ_HOME_ADDRESS: |
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case DASD_ECKD_CCW_READ_RECORD_ZERO: |
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case DASD_ECKD_CCW_READ: |
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case DASD_ECKD_CCW_READ_MT: |
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case DASD_ECKD_CCW_READ_CKD: |
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case DASD_ECKD_CCW_READ_CKD_MT: |
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case DASD_ECKD_CCW_READ_KD: |
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case DASD_ECKD_CCW_READ_KD_MT: |
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data->mask.perm = 0x1; |
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data->attributes.operation = private->attrib.operation; |
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break; |
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case DASD_ECKD_CCW_READ_COUNT: |
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data->mask.perm = 0x1; |
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data->attributes.operation = DASD_BYPASS_CACHE; |
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break; |
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case DASD_ECKD_CCW_READ_TRACK: |
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case DASD_ECKD_CCW_READ_TRACK_DATA: |
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data->mask.perm = 0x1; |
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data->attributes.operation = private->attrib.operation; |
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data->blk_size = 0; |
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break; |
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case DASD_ECKD_CCW_WRITE: |
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case DASD_ECKD_CCW_WRITE_MT: |
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case DASD_ECKD_CCW_WRITE_KD: |
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case DASD_ECKD_CCW_WRITE_KD_MT: |
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data->mask.perm = 0x02; |
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data->attributes.operation = private->attrib.operation; |
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rc = set_timestamp(ccw, data, device); |
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break; |
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case DASD_ECKD_CCW_WRITE_CKD: |
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case DASD_ECKD_CCW_WRITE_CKD_MT: |
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data->attributes.operation = DASD_BYPASS_CACHE; |
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rc = set_timestamp(ccw, data, device); |
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break; |
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case DASD_ECKD_CCW_ERASE: |
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case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: |
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case DASD_ECKD_CCW_WRITE_RECORD_ZERO: |
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data->mask.perm = 0x3; |
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data->mask.auth = 0x1; |
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data->attributes.operation = DASD_BYPASS_CACHE; |
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rc = set_timestamp(ccw, data, device); |
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break; |
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case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
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data->mask.perm = 0x03; |
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data->attributes.operation = private->attrib.operation; |
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data->blk_size = 0; |
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break; |
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case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
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data->mask.perm = 0x02; |
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data->attributes.operation = private->attrib.operation; |
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data->blk_size = blksize; |
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rc = set_timestamp(ccw, data, device); |
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break; |
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default: |
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dev_err(&device->cdev->dev, |
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"0x%x is not a known command\n", cmd); |
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break; |
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} |
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data->attributes.mode = 0x3; /* ECKD */ |
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|
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if ((private->rdc_data.cu_type == 0x2105 || |
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private->rdc_data.cu_type == 0x2107 || |
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private->rdc_data.cu_type == 0x1750) |
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&& !(private->uses_cdl && trk < 2)) |
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data->ga_extended |= 0x40; /* Regular Data Format Mode */ |
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heads = private->rdc_data.trk_per_cyl; |
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begcyl = trk / heads; |
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beghead = trk % heads; |
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endcyl = totrk / heads; |
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endhead = totrk % heads; |
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|
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/* check for sequential prestage - enhance cylinder range */ |
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if (data->attributes.operation == DASD_SEQ_PRESTAGE || |
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data->attributes.operation == DASD_SEQ_ACCESS) { |
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|
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if (endcyl + private->attrib.nr_cyl < private->real_cyl) |
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endcyl += private->attrib.nr_cyl; |
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else |
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endcyl = (private->real_cyl - 1); |
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} |
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set_ch_t(&data->beg_ext, begcyl, beghead); |
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set_ch_t(&data->end_ext, endcyl, endhead); |
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return rc; |
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} |
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static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, |
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unsigned int trk, unsigned int rec_on_trk, |
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int count, int cmd, struct dasd_device *device, |
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unsigned int reclen, unsigned int tlf) |
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{ |
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struct dasd_eckd_private *private = device->private; |
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int sector; |
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int dn, d; |
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|
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if (ccw) { |
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ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; |
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ccw->flags = 0; |
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if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) |
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ccw->count = 22; |
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else |
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ccw->count = 20; |
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ccw->cda = (__u32)__pa(data); |
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} |
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memset(data, 0, sizeof(*data)); |
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sector = 0; |
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if (rec_on_trk) { |
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switch (private->rdc_data.dev_type) { |
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case 0x3390: |
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dn = ceil_quot(reclen + 6, 232); |
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d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); |
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sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; |
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break; |
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case 0x3380: |
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d = 7 + ceil_quot(reclen + 12, 32); |
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sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; |
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break; |
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} |
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} |
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data->sector = sector; |
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/* note: meaning of count depends on the operation |
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* for record based I/O it's the number of records, but for |
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* track based I/O it's the number of tracks |
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*/ |
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data->count = count; |
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switch (cmd) { |
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case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: |
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data->operation.orientation = 0x3; |
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data->operation.operation = 0x03; |
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break; |
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case DASD_ECKD_CCW_READ_HOME_ADDRESS: |
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data->operation.orientation = 0x3; |
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data->operation.operation = 0x16; |
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break; |
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case DASD_ECKD_CCW_WRITE_RECORD_ZERO: |
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data->operation.orientation = 0x1; |
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data->operation.operation = 0x03; |
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data->count++; |
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break; |
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case DASD_ECKD_CCW_READ_RECORD_ZERO: |
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data->operation.orientation = 0x3; |
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data->operation.operation = 0x16; |
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data->count++; |
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break; |
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case DASD_ECKD_CCW_WRITE: |
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case DASD_ECKD_CCW_WRITE_MT: |
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case DASD_ECKD_CCW_WRITE_KD: |
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case DASD_ECKD_CCW_WRITE_KD_MT: |
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data->auxiliary.length_valid = 0x1; |
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data->length = reclen; |
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data->operation.operation = 0x01; |
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break; |
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case DASD_ECKD_CCW_WRITE_CKD: |
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case DASD_ECKD_CCW_WRITE_CKD_MT: |
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data->auxiliary.length_valid = 0x1; |
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data->length = reclen; |
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data->operation.operation = 0x03; |
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break; |
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case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
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data->operation.orientation = 0x0; |
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data->operation.operation = 0x3F; |
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data->extended_operation = 0x11; |
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data->length = 0; |
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data->extended_parameter_length = 0x02; |
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if (data->count > 8) { |
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data->extended_parameter[0] = 0xFF; |
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data->extended_parameter[1] = 0xFF; |
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data->extended_parameter[1] <<= (16 - count); |
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} else { |
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data->extended_parameter[0] = 0xFF; |
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data->extended_parameter[0] <<= (8 - count); |
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data->extended_parameter[1] = 0x00; |
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} |
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data->sector = 0xFF; |
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break; |
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case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
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data->auxiliary.length_valid = 0x1; |
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data->length = reclen; /* not tlf, as one might think */ |
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data->operation.operation = 0x3F; |
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data->extended_operation = 0x23; |
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break; |
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case DASD_ECKD_CCW_READ: |
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case DASD_ECKD_CCW_READ_MT: |
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case DASD_ECKD_CCW_READ_KD: |
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case DASD_ECKD_CCW_READ_KD_MT: |
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data->auxiliary.length_valid = 0x1; |
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data->length = reclen; |
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data->operation.operation = 0x06; |
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break; |
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case DASD_ECKD_CCW_READ_CKD: |
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case DASD_ECKD_CCW_READ_CKD_MT: |
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data->auxiliary.length_valid = 0x1; |
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data->length = reclen; |
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data->operation.operation = 0x16; |
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break; |
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case DASD_ECKD_CCW_READ_COUNT: |
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data->operation.operation = 0x06; |
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break; |
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case DASD_ECKD_CCW_READ_TRACK: |
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data->operation.orientation = 0x1; |
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data->operation.operation = 0x0C; |
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data->extended_parameter_length = 0; |
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data->sector = 0xFF; |
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break; |
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case DASD_ECKD_CCW_READ_TRACK_DATA: |
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data->auxiliary.length_valid = 0x1; |
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data->length = tlf; |
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data->operation.operation = 0x0C; |
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break; |
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case DASD_ECKD_CCW_ERASE: |
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data->length = reclen; |
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data->auxiliary.length_valid = 0x1; |
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data->operation.operation = 0x0b; |
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break; |
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default: |
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DBF_DEV_EVENT(DBF_ERR, device, |
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"fill LRE unknown opcode 0x%x", cmd); |
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BUG(); |
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} |
|
set_ch_t(&data->seek_addr, |
|
trk / private->rdc_data.trk_per_cyl, |
|
trk % private->rdc_data.trk_per_cyl); |
|
data->search_arg.cyl = data->seek_addr.cyl; |
|
data->search_arg.head = data->seek_addr.head; |
|
data->search_arg.record = rec_on_trk; |
|
} |
|
|
|
static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, |
|
unsigned int trk, unsigned int totrk, int cmd, |
|
struct dasd_device *basedev, struct dasd_device *startdev, |
|
unsigned int format, unsigned int rec_on_trk, int count, |
|
unsigned int blksize, unsigned int tlf) |
|
{ |
|
struct dasd_eckd_private *basepriv, *startpriv; |
|
struct LRE_eckd_data *lredata; |
|
struct DE_eckd_data *dedata; |
|
int rc = 0; |
|
|
|
basepriv = basedev->private; |
|
startpriv = startdev->private; |
|
dedata = &pfxdata->define_extent; |
|
lredata = &pfxdata->locate_record; |
|
|
|
ccw->cmd_code = DASD_ECKD_CCW_PFX; |
|
ccw->flags = 0; |
|
if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { |
|
ccw->count = sizeof(*pfxdata) + 2; |
|
ccw->cda = (__u32) __pa(pfxdata); |
|
memset(pfxdata, 0, sizeof(*pfxdata) + 2); |
|
} else { |
|
ccw->count = sizeof(*pfxdata); |
|
ccw->cda = (__u32) __pa(pfxdata); |
|
memset(pfxdata, 0, sizeof(*pfxdata)); |
|
} |
|
|
|
/* prefix data */ |
|
if (format > 1) { |
|
DBF_DEV_EVENT(DBF_ERR, basedev, |
|
"PFX LRE unknown format 0x%x", format); |
|
BUG(); |
|
return -EINVAL; |
|
} |
|
pfxdata->format = format; |
|
pfxdata->base_address = basepriv->ned->unit_addr; |
|
pfxdata->base_lss = basepriv->ned->ID; |
|
pfxdata->validity.define_extent = 1; |
|
|
|
/* private uid is kept up to date, conf_data may be outdated */ |
|
if (startpriv->uid.type == UA_BASE_PAV_ALIAS) |
|
pfxdata->validity.verify_base = 1; |
|
|
|
if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { |
|
pfxdata->validity.verify_base = 1; |
|
pfxdata->validity.hyper_pav = 1; |
|
} |
|
|
|
rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); |
|
|
|
/* |
|
* For some commands the System Time Stamp is set in the define extent |
|
* data when XRC is supported. The validity of the time stamp must be |
|
* reflected in the prefix data as well. |
|
*/ |
|
if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) |
|
pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ |
|
|
|
if (format == 1) { |
|
locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, |
|
basedev, blksize, tlf); |
|
} |
|
|
|
return rc; |
|
} |
|
|
|
static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, |
|
unsigned int trk, unsigned int totrk, int cmd, |
|
struct dasd_device *basedev, struct dasd_device *startdev) |
|
{ |
|
return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, |
|
0, 0, 0, 0, 0); |
|
} |
|
|
|
static void |
|
locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, |
|
unsigned int rec_on_trk, int no_rec, int cmd, |
|
struct dasd_device * device, int reclen) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
int sector; |
|
int dn, d; |
|
|
|
DBF_DEV_EVENT(DBF_INFO, device, |
|
"Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", |
|
trk, rec_on_trk, no_rec, cmd, reclen); |
|
|
|
ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; |
|
ccw->flags = 0; |
|
ccw->count = 16; |
|
ccw->cda = (__u32) __pa(data); |
|
|
|
memset(data, 0, sizeof(struct LO_eckd_data)); |
|
sector = 0; |
|
if (rec_on_trk) { |
|
switch (private->rdc_data.dev_type) { |
|
case 0x3390: |
|
dn = ceil_quot(reclen + 6, 232); |
|
d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); |
|
sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; |
|
break; |
|
case 0x3380: |
|
d = 7 + ceil_quot(reclen + 12, 32); |
|
sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; |
|
break; |
|
} |
|
} |
|
data->sector = sector; |
|
data->count = no_rec; |
|
switch (cmd) { |
|
case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: |
|
data->operation.orientation = 0x3; |
|
data->operation.operation = 0x03; |
|
break; |
|
case DASD_ECKD_CCW_READ_HOME_ADDRESS: |
|
data->operation.orientation = 0x3; |
|
data->operation.operation = 0x16; |
|
break; |
|
case DASD_ECKD_CCW_WRITE_RECORD_ZERO: |
|
data->operation.orientation = 0x1; |
|
data->operation.operation = 0x03; |
|
data->count++; |
|
break; |
|
case DASD_ECKD_CCW_READ_RECORD_ZERO: |
|
data->operation.orientation = 0x3; |
|
data->operation.operation = 0x16; |
|
data->count++; |
|
break; |
|
case DASD_ECKD_CCW_WRITE: |
|
case DASD_ECKD_CCW_WRITE_MT: |
|
case DASD_ECKD_CCW_WRITE_KD: |
|
case DASD_ECKD_CCW_WRITE_KD_MT: |
|
data->auxiliary.last_bytes_used = 0x1; |
|
data->length = reclen; |
|
data->operation.operation = 0x01; |
|
break; |
|
case DASD_ECKD_CCW_WRITE_CKD: |
|
case DASD_ECKD_CCW_WRITE_CKD_MT: |
|
data->auxiliary.last_bytes_used = 0x1; |
|
data->length = reclen; |
|
data->operation.operation = 0x03; |
|
break; |
|
case DASD_ECKD_CCW_READ: |
|
case DASD_ECKD_CCW_READ_MT: |
|
case DASD_ECKD_CCW_READ_KD: |
|
case DASD_ECKD_CCW_READ_KD_MT: |
|
data->auxiliary.last_bytes_used = 0x1; |
|
data->length = reclen; |
|
data->operation.operation = 0x06; |
|
break; |
|
case DASD_ECKD_CCW_READ_CKD: |
|
case DASD_ECKD_CCW_READ_CKD_MT: |
|
data->auxiliary.last_bytes_used = 0x1; |
|
data->length = reclen; |
|
data->operation.operation = 0x16; |
|
break; |
|
case DASD_ECKD_CCW_READ_COUNT: |
|
data->operation.operation = 0x06; |
|
break; |
|
case DASD_ECKD_CCW_ERASE: |
|
data->length = reclen; |
|
data->auxiliary.last_bytes_used = 0x1; |
|
data->operation.operation = 0x0b; |
|
break; |
|
default: |
|
DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " |
|
"opcode 0x%x", cmd); |
|
} |
|
set_ch_t(&data->seek_addr, |
|
trk / private->rdc_data.trk_per_cyl, |
|
trk % private->rdc_data.trk_per_cyl); |
|
data->search_arg.cyl = data->seek_addr.cyl; |
|
data->search_arg.head = data->seek_addr.head; |
|
data->search_arg.record = rec_on_trk; |
|
} |
|
|
|
/* |
|
* Returns 1 if the block is one of the special blocks that needs |
|
* to get read/written with the KD variant of the command. |
|
* That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and |
|
* DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. |
|
* Luckily the KD variants differ only by one bit (0x08) from the |
|
* normal variant. So don't wonder about code like: |
|
* if (dasd_eckd_cdl_special(blk_per_trk, recid)) |
|
* ccw->cmd_code |= 0x8; |
|
*/ |
|
static inline int |
|
dasd_eckd_cdl_special(int blk_per_trk, int recid) |
|
{ |
|
if (recid < 3) |
|
return 1; |
|
if (recid < blk_per_trk) |
|
return 0; |
|
if (recid < 2 * blk_per_trk) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
/* |
|
* Returns the record size for the special blocks of the cdl format. |
|
* Only returns something useful if dasd_eckd_cdl_special is true |
|
* for the recid. |
|
*/ |
|
static inline int |
|
dasd_eckd_cdl_reclen(int recid) |
|
{ |
|
if (recid < 3) |
|
return sizes_trk0[recid]; |
|
return LABEL_SIZE; |
|
} |
|
/* create unique id from private structure. */ |
|
static void create_uid(struct dasd_eckd_private *private) |
|
{ |
|
int count; |
|
struct dasd_uid *uid; |
|
|
|
uid = &private->uid; |
|
memset(uid, 0, sizeof(struct dasd_uid)); |
|
memcpy(uid->vendor, private->ned->HDA_manufacturer, |
|
sizeof(uid->vendor) - 1); |
|
EBCASC(uid->vendor, sizeof(uid->vendor) - 1); |
|
memcpy(uid->serial, &private->ned->serial, |
|
sizeof(uid->serial) - 1); |
|
EBCASC(uid->serial, sizeof(uid->serial) - 1); |
|
uid->ssid = private->gneq->subsystemID; |
|
uid->real_unit_addr = private->ned->unit_addr; |
|
if (private->sneq) { |
|
uid->type = private->sneq->sua_flags; |
|
if (uid->type == UA_BASE_PAV_ALIAS) |
|
uid->base_unit_addr = private->sneq->base_unit_addr; |
|
} else { |
|
uid->type = UA_BASE_DEVICE; |
|
} |
|
if (private->vdsneq) { |
|
for (count = 0; count < 16; count++) { |
|
sprintf(uid->vduit+2*count, "%02x", |
|
private->vdsneq->uit[count]); |
|
} |
|
} |
|
} |
|
|
|
/* |
|
* Generate device unique id that specifies the physical device. |
|
*/ |
|
static int dasd_eckd_generate_uid(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
unsigned long flags; |
|
|
|
if (!private) |
|
return -ENODEV; |
|
if (!private->ned || !private->gneq) |
|
return -ENODEV; |
|
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
|
create_uid(private); |
|
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
|
return 0; |
|
} |
|
|
|
static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
unsigned long flags; |
|
|
|
if (private) { |
|
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
|
*uid = private->uid; |
|
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
|
return 0; |
|
} |
|
return -EINVAL; |
|
} |
|
|
|
/* |
|
* compare device UID with data of a given dasd_eckd_private structure |
|
* return 0 for match |
|
*/ |
|
static int dasd_eckd_compare_path_uid(struct dasd_device *device, |
|
struct dasd_eckd_private *private) |
|
{ |
|
struct dasd_uid device_uid; |
|
|
|
create_uid(private); |
|
dasd_eckd_get_uid(device, &device_uid); |
|
|
|
return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); |
|
} |
|
|
|
static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, |
|
struct dasd_ccw_req *cqr, |
|
__u8 *rcd_buffer, |
|
__u8 lpm) |
|
{ |
|
struct ccw1 *ccw; |
|
/* |
|
* buffer has to start with EBCDIC "V1.0" to show |
|
* support for virtual device SNEQ |
|
*/ |
|
rcd_buffer[0] = 0xE5; |
|
rcd_buffer[1] = 0xF1; |
|
rcd_buffer[2] = 0x4B; |
|
rcd_buffer[3] = 0xF0; |
|
|
|
ccw = cqr->cpaddr; |
|
ccw->cmd_code = DASD_ECKD_CCW_RCD; |
|
ccw->flags = 0; |
|
ccw->cda = (__u32)(addr_t)rcd_buffer; |
|
ccw->count = DASD_ECKD_RCD_DATA_SIZE; |
|
cqr->magic = DASD_ECKD_MAGIC; |
|
|
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
cqr->block = NULL; |
|
cqr->expires = 10*HZ; |
|
cqr->lpm = lpm; |
|
cqr->retries = 256; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
|
} |
|
|
|
/* |
|
* Wakeup helper for read_conf |
|
* if the cqr is not done and needs some error recovery |
|
* the buffer has to be re-initialized with the EBCDIC "V1.0" |
|
* to show support for virtual device SNEQ |
|
*/ |
|
static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) |
|
{ |
|
struct ccw1 *ccw; |
|
__u8 *rcd_buffer; |
|
|
|
if (cqr->status != DASD_CQR_DONE) { |
|
ccw = cqr->cpaddr; |
|
rcd_buffer = (__u8 *)((addr_t) ccw->cda); |
|
memset(rcd_buffer, 0, sizeof(*rcd_buffer)); |
|
|
|
rcd_buffer[0] = 0xE5; |
|
rcd_buffer[1] = 0xF1; |
|
rcd_buffer[2] = 0x4B; |
|
rcd_buffer[3] = 0xF0; |
|
} |
|
dasd_wakeup_cb(cqr, data); |
|
} |
|
|
|
static int dasd_eckd_read_conf_immediately(struct dasd_device *device, |
|
struct dasd_ccw_req *cqr, |
|
__u8 *rcd_buffer, |
|
__u8 lpm) |
|
{ |
|
struct ciw *ciw; |
|
int rc; |
|
/* |
|
* sanity check: scan for RCD command in extended SenseID data |
|
* some devices do not support RCD |
|
*/ |
|
ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); |
|
if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) |
|
return -EOPNOTSUPP; |
|
|
|
dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); |
|
clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
|
set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
|
cqr->retries = 5; |
|
cqr->callback = read_conf_cb; |
|
rc = dasd_sleep_on_immediatly(cqr); |
|
return rc; |
|
} |
|
|
|
static int dasd_eckd_read_conf_lpm(struct dasd_device *device, |
|
void **rcd_buffer, |
|
int *rcd_buffer_size, __u8 lpm) |
|
{ |
|
struct ciw *ciw; |
|
char *rcd_buf = NULL; |
|
int ret; |
|
struct dasd_ccw_req *cqr; |
|
|
|
/* |
|
* sanity check: scan for RCD command in extended SenseID data |
|
* some devices do not support RCD |
|
*/ |
|
ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); |
|
if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { |
|
ret = -EOPNOTSUPP; |
|
goto out_error; |
|
} |
|
rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); |
|
if (!rcd_buf) { |
|
ret = -ENOMEM; |
|
goto out_error; |
|
} |
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, |
|
0, /* use rcd_buf as data ara */ |
|
device, NULL); |
|
if (IS_ERR(cqr)) { |
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
|
"Could not allocate RCD request"); |
|
ret = -ENOMEM; |
|
goto out_error; |
|
} |
|
dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); |
|
cqr->callback = read_conf_cb; |
|
ret = dasd_sleep_on(cqr); |
|
/* |
|
* on success we update the user input parms |
|
*/ |
|
dasd_sfree_request(cqr, cqr->memdev); |
|
if (ret) |
|
goto out_error; |
|
|
|
*rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; |
|
*rcd_buffer = rcd_buf; |
|
return 0; |
|
out_error: |
|
kfree(rcd_buf); |
|
*rcd_buffer = NULL; |
|
*rcd_buffer_size = 0; |
|
return ret; |
|
} |
|
|
|
static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) |
|
{ |
|
|
|
struct dasd_sneq *sneq; |
|
int i, count; |
|
|
|
private->ned = NULL; |
|
private->sneq = NULL; |
|
private->vdsneq = NULL; |
|
private->gneq = NULL; |
|
count = private->conf_len / sizeof(struct dasd_sneq); |
|
sneq = (struct dasd_sneq *)private->conf_data; |
|
for (i = 0; i < count; ++i) { |
|
if (sneq->flags.identifier == 1 && sneq->format == 1) |
|
private->sneq = sneq; |
|
else if (sneq->flags.identifier == 1 && sneq->format == 4) |
|
private->vdsneq = (struct vd_sneq *)sneq; |
|
else if (sneq->flags.identifier == 2) |
|
private->gneq = (struct dasd_gneq *)sneq; |
|
else if (sneq->flags.identifier == 3 && sneq->res1 == 1) |
|
private->ned = (struct dasd_ned *)sneq; |
|
sneq++; |
|
} |
|
if (!private->ned || !private->gneq) { |
|
private->ned = NULL; |
|
private->sneq = NULL; |
|
private->vdsneq = NULL; |
|
private->gneq = NULL; |
|
return -EINVAL; |
|
} |
|
return 0; |
|
|
|
}; |
|
|
|
static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) |
|
{ |
|
struct dasd_gneq *gneq; |
|
int i, count, found; |
|
|
|
count = conf_len / sizeof(*gneq); |
|
gneq = (struct dasd_gneq *)conf_data; |
|
found = 0; |
|
for (i = 0; i < count; ++i) { |
|
if (gneq->flags.identifier == 2) { |
|
found = 1; |
|
break; |
|
} |
|
gneq++; |
|
} |
|
if (found) |
|
return ((char *)gneq)[18] & 0x07; |
|
else |
|
return 0; |
|
} |
|
|
|
static void dasd_eckd_store_conf_data(struct dasd_device *device, |
|
struct dasd_conf_data *conf_data, int chp) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
struct channel_path_desc_fmt0 *chp_desc; |
|
struct subchannel_id sch_id; |
|
void *cdp; |
|
|
|
/* |
|
* path handling and read_conf allocate data |
|
* free it before replacing the pointer |
|
* also replace the old private->conf_data pointer |
|
* with the new one if this points to the same data |
|
*/ |
|
cdp = device->path[chp].conf_data; |
|
if (private->conf_data == cdp) { |
|
private->conf_data = (void *)conf_data; |
|
dasd_eckd_identify_conf_parts(private); |
|
} |
|
ccw_device_get_schid(device->cdev, &sch_id); |
|
device->path[chp].conf_data = conf_data; |
|
device->path[chp].cssid = sch_id.cssid; |
|
device->path[chp].ssid = sch_id.ssid; |
|
chp_desc = ccw_device_get_chp_desc(device->cdev, chp); |
|
if (chp_desc) |
|
device->path[chp].chpid = chp_desc->chpid; |
|
kfree(chp_desc); |
|
kfree(cdp); |
|
} |
|
|
|
static void dasd_eckd_clear_conf_data(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
int i; |
|
|
|
private->conf_data = NULL; |
|
private->conf_len = 0; |
|
for (i = 0; i < 8; i++) { |
|
kfree(device->path[i].conf_data); |
|
device->path[i].conf_data = NULL; |
|
device->path[i].cssid = 0; |
|
device->path[i].ssid = 0; |
|
device->path[i].chpid = 0; |
|
dasd_path_notoper(device, i); |
|
} |
|
} |
|
|
|
static void dasd_eckd_read_fc_security(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
u8 esm_valid; |
|
u8 esm[8]; |
|
int chp; |
|
int rc; |
|
|
|
rc = chsc_scud(private->uid.ssid, (u64 *)esm, &esm_valid); |
|
if (rc) { |
|
for (chp = 0; chp < 8; chp++) |
|
device->path[chp].fc_security = 0; |
|
return; |
|
} |
|
|
|
for (chp = 0; chp < 8; chp++) { |
|
if (esm_valid & (0x80 >> chp)) |
|
device->path[chp].fc_security = esm[chp]; |
|
else |
|
device->path[chp].fc_security = 0; |
|
} |
|
} |
|
|
|
static int dasd_eckd_read_conf(struct dasd_device *device) |
|
{ |
|
void *conf_data; |
|
int conf_len, conf_data_saved; |
|
int rc, path_err, pos; |
|
__u8 lpm, opm; |
|
struct dasd_eckd_private *private, path_private; |
|
struct dasd_uid *uid; |
|
char print_path_uid[60], print_device_uid[60]; |
|
|
|
private = device->private; |
|
opm = ccw_device_get_path_mask(device->cdev); |
|
conf_data_saved = 0; |
|
path_err = 0; |
|
/* get configuration data per operational path */ |
|
for (lpm = 0x80; lpm; lpm>>= 1) { |
|
if (!(lpm & opm)) |
|
continue; |
|
rc = dasd_eckd_read_conf_lpm(device, &conf_data, |
|
&conf_len, lpm); |
|
if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
|
"Read configuration data returned " |
|
"error %d", rc); |
|
return rc; |
|
} |
|
if (conf_data == NULL) { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
|
"No configuration data " |
|
"retrieved"); |
|
/* no further analysis possible */ |
|
dasd_path_add_opm(device, opm); |
|
continue; /* no error */ |
|
} |
|
/* save first valid configuration data */ |
|
if (!conf_data_saved) { |
|
/* initially clear previously stored conf_data */ |
|
dasd_eckd_clear_conf_data(device); |
|
private->conf_data = conf_data; |
|
private->conf_len = conf_len; |
|
if (dasd_eckd_identify_conf_parts(private)) { |
|
private->conf_data = NULL; |
|
private->conf_len = 0; |
|
kfree(conf_data); |
|
continue; |
|
} |
|
/* |
|
* build device UID that other path data |
|
* can be compared to it |
|
*/ |
|
dasd_eckd_generate_uid(device); |
|
conf_data_saved++; |
|
} else { |
|
path_private.conf_data = conf_data; |
|
path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; |
|
if (dasd_eckd_identify_conf_parts( |
|
&path_private)) { |
|
path_private.conf_data = NULL; |
|
path_private.conf_len = 0; |
|
kfree(conf_data); |
|
continue; |
|
} |
|
if (dasd_eckd_compare_path_uid( |
|
device, &path_private)) { |
|
uid = &path_private.uid; |
|
if (strlen(uid->vduit) > 0) |
|
snprintf(print_path_uid, |
|
sizeof(print_path_uid), |
|
"%s.%s.%04x.%02x.%s", |
|
uid->vendor, uid->serial, |
|
uid->ssid, uid->real_unit_addr, |
|
uid->vduit); |
|
else |
|
snprintf(print_path_uid, |
|
sizeof(print_path_uid), |
|
"%s.%s.%04x.%02x", |
|
uid->vendor, uid->serial, |
|
uid->ssid, |
|
uid->real_unit_addr); |
|
uid = &private->uid; |
|
if (strlen(uid->vduit) > 0) |
|
snprintf(print_device_uid, |
|
sizeof(print_device_uid), |
|
"%s.%s.%04x.%02x.%s", |
|
uid->vendor, uid->serial, |
|
uid->ssid, uid->real_unit_addr, |
|
uid->vduit); |
|
else |
|
snprintf(print_device_uid, |
|
sizeof(print_device_uid), |
|
"%s.%s.%04x.%02x", |
|
uid->vendor, uid->serial, |
|
uid->ssid, |
|
uid->real_unit_addr); |
|
dev_err(&device->cdev->dev, |
|
"Not all channel paths lead to " |
|
"the same device, path %02X leads to " |
|
"device %s instead of %s\n", lpm, |
|
print_path_uid, print_device_uid); |
|
path_err = -EINVAL; |
|
dasd_path_add_cablepm(device, lpm); |
|
continue; |
|
} |
|
path_private.conf_data = NULL; |
|
path_private.conf_len = 0; |
|
} |
|
|
|
pos = pathmask_to_pos(lpm); |
|
dasd_eckd_store_conf_data(device, conf_data, pos); |
|
|
|
switch (dasd_eckd_path_access(conf_data, conf_len)) { |
|
case 0x02: |
|
dasd_path_add_nppm(device, lpm); |
|
break; |
|
case 0x03: |
|
dasd_path_add_ppm(device, lpm); |
|
break; |
|
} |
|
if (!dasd_path_get_opm(device)) { |
|
dasd_path_set_opm(device, lpm); |
|
dasd_generic_path_operational(device); |
|
} else { |
|
dasd_path_add_opm(device, lpm); |
|
} |
|
} |
|
|
|
dasd_eckd_read_fc_security(device); |
|
|
|
return path_err; |
|
} |
|
|
|
static u32 get_fcx_max_data(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
int fcx_in_css, fcx_in_gneq, fcx_in_features; |
|
unsigned int mdc; |
|
int tpm; |
|
|
|
if (dasd_nofcx) |
|
return 0; |
|
/* is transport mode supported? */ |
|
fcx_in_css = css_general_characteristics.fcx; |
|
fcx_in_gneq = private->gneq->reserved2[7] & 0x04; |
|
fcx_in_features = private->features.feature[40] & 0x80; |
|
tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; |
|
|
|
if (!tpm) |
|
return 0; |
|
|
|
mdc = ccw_device_get_mdc(device->cdev, 0); |
|
if (mdc == 0) { |
|
dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); |
|
return 0; |
|
} else { |
|
return (u32)mdc * FCX_MAX_DATA_FACTOR; |
|
} |
|
} |
|
|
|
static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
unsigned int mdc; |
|
u32 fcx_max_data; |
|
|
|
if (private->fcx_max_data) { |
|
mdc = ccw_device_get_mdc(device->cdev, lpm); |
|
if (mdc == 0) { |
|
dev_warn(&device->cdev->dev, |
|
"Detecting the maximum data size for zHPF " |
|
"requests failed (rc=%d) for a new path %x\n", |
|
mdc, lpm); |
|
return mdc; |
|
} |
|
fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; |
|
if (fcx_max_data < private->fcx_max_data) { |
|
dev_warn(&device->cdev->dev, |
|
"The maximum data size for zHPF requests %u " |
|
"on a new path %x is below the active maximum " |
|
"%u\n", fcx_max_data, lpm, |
|
private->fcx_max_data); |
|
return -EACCES; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
static int rebuild_device_uid(struct dasd_device *device, |
|
struct pe_handler_work_data *data) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
__u8 lpm, opm = dasd_path_get_opm(device); |
|
int rc = -ENODEV; |
|
|
|
for (lpm = 0x80; lpm; lpm >>= 1) { |
|
if (!(lpm & opm)) |
|
continue; |
|
memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); |
|
memset(&data->cqr, 0, sizeof(data->cqr)); |
|
data->cqr.cpaddr = &data->ccw; |
|
rc = dasd_eckd_read_conf_immediately(device, &data->cqr, |
|
data->rcd_buffer, |
|
lpm); |
|
|
|
if (rc) { |
|
if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ |
|
continue; |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
|
"Read configuration data " |
|
"returned error %d", rc); |
|
break; |
|
} |
|
memcpy(private->conf_data, data->rcd_buffer, |
|
DASD_ECKD_RCD_DATA_SIZE); |
|
if (dasd_eckd_identify_conf_parts(private)) { |
|
rc = -ENODEV; |
|
} else /* first valid path is enough */ |
|
break; |
|
} |
|
|
|
if (!rc) |
|
rc = dasd_eckd_generate_uid(device); |
|
|
|
return rc; |
|
} |
|
|
|
static void dasd_eckd_path_available_action(struct dasd_device *device, |
|
struct pe_handler_work_data *data) |
|
{ |
|
struct dasd_eckd_private path_private; |
|
struct dasd_uid *uid; |
|
__u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; |
|
__u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; |
|
struct dasd_conf_data *conf_data; |
|
unsigned long flags; |
|
char print_uid[60]; |
|
int rc, pos; |
|
|
|
opm = 0; |
|
npm = 0; |
|
ppm = 0; |
|
epm = 0; |
|
hpfpm = 0; |
|
cablepm = 0; |
|
|
|
for (lpm = 0x80; lpm; lpm >>= 1) { |
|
if (!(lpm & data->tbvpm)) |
|
continue; |
|
memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); |
|
memset(&data->cqr, 0, sizeof(data->cqr)); |
|
data->cqr.cpaddr = &data->ccw; |
|
rc = dasd_eckd_read_conf_immediately(device, &data->cqr, |
|
data->rcd_buffer, |
|
lpm); |
|
if (!rc) { |
|
switch (dasd_eckd_path_access(data->rcd_buffer, |
|
DASD_ECKD_RCD_DATA_SIZE) |
|
) { |
|
case 0x02: |
|
npm |= lpm; |
|
break; |
|
case 0x03: |
|
ppm |= lpm; |
|
break; |
|
} |
|
opm |= lpm; |
|
} else if (rc == -EOPNOTSUPP) { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
|
"path verification: No configuration " |
|
"data retrieved"); |
|
opm |= lpm; |
|
} else if (rc == -EAGAIN) { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
|
"path verification: device is stopped," |
|
" try again later"); |
|
epm |= lpm; |
|
} else { |
|
dev_warn(&device->cdev->dev, |
|
"Reading device feature codes failed " |
|
"(rc=%d) for new path %x\n", rc, lpm); |
|
continue; |
|
} |
|
if (verify_fcx_max_data(device, lpm)) { |
|
opm &= ~lpm; |
|
npm &= ~lpm; |
|
ppm &= ~lpm; |
|
hpfpm |= lpm; |
|
continue; |
|
} |
|
|
|
/* |
|
* save conf_data for comparison after |
|
* rebuild_device_uid may have changed |
|
* the original data |
|
*/ |
|
memcpy(&path_rcd_buf, data->rcd_buffer, |
|
DASD_ECKD_RCD_DATA_SIZE); |
|
path_private.conf_data = (void *) &path_rcd_buf; |
|
path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; |
|
if (dasd_eckd_identify_conf_parts(&path_private)) { |
|
path_private.conf_data = NULL; |
|
path_private.conf_len = 0; |
|
continue; |
|
} |
|
|
|
/* |
|
* compare path UID with device UID only if at least |
|
* one valid path is left |
|
* in other case the device UID may have changed and |
|
* the first working path UID will be used as device UID |
|
*/ |
|
if (dasd_path_get_opm(device) && |
|
dasd_eckd_compare_path_uid(device, &path_private)) { |
|
/* |
|
* the comparison was not successful |
|
* rebuild the device UID with at least one |
|
* known path in case a z/VM hyperswap command |
|
* has changed the device |
|
* |
|
* after this compare again |
|
* |
|
* if either the rebuild or the recompare fails |
|
* the path can not be used |
|
*/ |
|
if (rebuild_device_uid(device, data) || |
|
dasd_eckd_compare_path_uid( |
|
device, &path_private)) { |
|
uid = &path_private.uid; |
|
if (strlen(uid->vduit) > 0) |
|
snprintf(print_uid, sizeof(print_uid), |
|
"%s.%s.%04x.%02x.%s", |
|
uid->vendor, uid->serial, |
|
uid->ssid, uid->real_unit_addr, |
|
uid->vduit); |
|
else |
|
snprintf(print_uid, sizeof(print_uid), |
|
"%s.%s.%04x.%02x", |
|
uid->vendor, uid->serial, |
|
uid->ssid, |
|
uid->real_unit_addr); |
|
dev_err(&device->cdev->dev, |
|
"The newly added channel path %02X " |
|
"will not be used because it leads " |
|
"to a different device %s\n", |
|
lpm, print_uid); |
|
opm &= ~lpm; |
|
npm &= ~lpm; |
|
ppm &= ~lpm; |
|
cablepm |= lpm; |
|
continue; |
|
} |
|
} |
|
|
|
conf_data = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL); |
|
if (conf_data) { |
|
memcpy(conf_data, data->rcd_buffer, |
|
DASD_ECKD_RCD_DATA_SIZE); |
|
} |
|
pos = pathmask_to_pos(lpm); |
|
dasd_eckd_store_conf_data(device, conf_data, pos); |
|
|
|
/* |
|
* There is a small chance that a path is lost again between |
|
* above path verification and the following modification of |
|
* the device opm mask. We could avoid that race here by using |
|
* yet another path mask, but we rather deal with this unlikely |
|
* situation in dasd_start_IO. |
|
*/ |
|
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
|
if (!dasd_path_get_opm(device) && opm) { |
|
dasd_path_set_opm(device, opm); |
|
dasd_generic_path_operational(device); |
|
} else { |
|
dasd_path_add_opm(device, opm); |
|
} |
|
dasd_path_add_nppm(device, npm); |
|
dasd_path_add_ppm(device, ppm); |
|
dasd_path_add_tbvpm(device, epm); |
|
dasd_path_add_cablepm(device, cablepm); |
|
dasd_path_add_nohpfpm(device, hpfpm); |
|
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
|
|
|
dasd_path_create_kobj(device, pos); |
|
} |
|
} |
|
|
|
static void do_pe_handler_work(struct work_struct *work) |
|
{ |
|
struct pe_handler_work_data *data; |
|
struct dasd_device *device; |
|
|
|
data = container_of(work, struct pe_handler_work_data, worker); |
|
device = data->device; |
|
|
|
/* delay path verification until device was resumed */ |
|
if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { |
|
schedule_work(work); |
|
return; |
|
} |
|
/* check if path verification already running and delay if so */ |
|
if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { |
|
schedule_work(work); |
|
return; |
|
} |
|
|
|
if (data->tbvpm) |
|
dasd_eckd_path_available_action(device, data); |
|
if (data->fcsecpm) |
|
dasd_eckd_read_fc_security(device); |
|
|
|
clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); |
|
dasd_put_device(device); |
|
if (data->isglobal) |
|
mutex_unlock(&dasd_pe_handler_mutex); |
|
else |
|
kfree(data); |
|
} |
|
|
|
static int dasd_eckd_pe_handler(struct dasd_device *device, |
|
__u8 tbvpm, __u8 fcsecpm) |
|
{ |
|
struct pe_handler_work_data *data; |
|
|
|
data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); |
|
if (!data) { |
|
if (mutex_trylock(&dasd_pe_handler_mutex)) { |
|
data = pe_handler_worker; |
|
data->isglobal = 1; |
|
} else { |
|
return -ENOMEM; |
|
} |
|
} else { |
|
memset(data, 0, sizeof(*data)); |
|
data->isglobal = 0; |
|
} |
|
INIT_WORK(&data->worker, do_pe_handler_work); |
|
dasd_get_device(device); |
|
data->device = device; |
|
data->tbvpm = tbvpm; |
|
data->fcsecpm = fcsecpm; |
|
schedule_work(&data->worker); |
|
return 0; |
|
} |
|
|
|
static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
unsigned long flags; |
|
|
|
if (!private->fcx_max_data) |
|
private->fcx_max_data = get_fcx_max_data(device); |
|
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
|
dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); |
|
dasd_schedule_device_bh(device); |
|
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
|
} |
|
|
|
static int dasd_eckd_read_features(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
struct dasd_psf_prssd_data *prssdp; |
|
struct dasd_rssd_features *features; |
|
struct dasd_ccw_req *cqr; |
|
struct ccw1 *ccw; |
|
int rc; |
|
|
|
memset(&private->features, 0, sizeof(struct dasd_rssd_features)); |
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
|
(sizeof(struct dasd_psf_prssd_data) + |
|
sizeof(struct dasd_rssd_features)), |
|
device, NULL); |
|
if (IS_ERR(cqr)) { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " |
|
"allocate initialization request"); |
|
return PTR_ERR(cqr); |
|
} |
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
cqr->block = NULL; |
|
cqr->retries = 256; |
|
cqr->expires = 10 * HZ; |
|
|
|
/* Prepare for Read Subsystem Data */ |
|
prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
|
memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); |
|
prssdp->order = PSF_ORDER_PRSSD; |
|
prssdp->suborder = 0x41; /* Read Feature Codes */ |
|
/* all other bytes of prssdp must be zero */ |
|
|
|
ccw = cqr->cpaddr; |
|
ccw->cmd_code = DASD_ECKD_CCW_PSF; |
|
ccw->count = sizeof(struct dasd_psf_prssd_data); |
|
ccw->flags |= CCW_FLAG_CC; |
|
ccw->cda = (__u32)(addr_t) prssdp; |
|
|
|
/* Read Subsystem Data - feature codes */ |
|
features = (struct dasd_rssd_features *) (prssdp + 1); |
|
memset(features, 0, sizeof(struct dasd_rssd_features)); |
|
|
|
ccw++; |
|
ccw->cmd_code = DASD_ECKD_CCW_RSSD; |
|
ccw->count = sizeof(struct dasd_rssd_features); |
|
ccw->cda = (__u32)(addr_t) features; |
|
|
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
rc = dasd_sleep_on(cqr); |
|
if (rc == 0) { |
|
prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
|
features = (struct dasd_rssd_features *) (prssdp + 1); |
|
memcpy(&private->features, features, |
|
sizeof(struct dasd_rssd_features)); |
|
} else |
|
dev_warn(&device->cdev->dev, "Reading device feature codes" |
|
" failed with rc=%d\n", rc); |
|
dasd_sfree_request(cqr, cqr->memdev); |
|
return rc; |
|
} |
|
|
|
/* Read Volume Information - Volume Storage Query */ |
|
static int dasd_eckd_read_vol_info(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
struct dasd_psf_prssd_data *prssdp; |
|
struct dasd_rssd_vsq *vsq; |
|
struct dasd_ccw_req *cqr; |
|
struct ccw1 *ccw; |
|
int useglobal; |
|
int rc; |
|
|
|
/* This command cannot be executed on an alias device */ |
|
if (private->uid.type == UA_BASE_PAV_ALIAS || |
|
private->uid.type == UA_HYPER_PAV_ALIAS) |
|
return 0; |
|
|
|
useglobal = 0; |
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, |
|
sizeof(*prssdp) + sizeof(*vsq), device, NULL); |
|
if (IS_ERR(cqr)) { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
|
"Could not allocate initialization request"); |
|
mutex_lock(&dasd_vol_info_mutex); |
|
useglobal = 1; |
|
cqr = &dasd_vol_info_req->cqr; |
|
memset(cqr, 0, sizeof(*cqr)); |
|
memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req)); |
|
cqr->cpaddr = &dasd_vol_info_req->ccw; |
|
cqr->data = &dasd_vol_info_req->data; |
|
cqr->magic = DASD_ECKD_MAGIC; |
|
} |
|
|
|
/* Prepare for Read Subsystem Data */ |
|
prssdp = cqr->data; |
|
prssdp->order = PSF_ORDER_PRSSD; |
|
prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ |
|
prssdp->lss = private->ned->ID; |
|
prssdp->volume = private->ned->unit_addr; |
|
|
|
ccw = cqr->cpaddr; |
|
ccw->cmd_code = DASD_ECKD_CCW_PSF; |
|
ccw->count = sizeof(*prssdp); |
|
ccw->flags |= CCW_FLAG_CC; |
|
ccw->cda = (__u32)(addr_t)prssdp; |
|
|
|
/* Read Subsystem Data - Volume Storage Query */ |
|
vsq = (struct dasd_rssd_vsq *)(prssdp + 1); |
|
memset(vsq, 0, sizeof(*vsq)); |
|
|
|
ccw++; |
|
ccw->cmd_code = DASD_ECKD_CCW_RSSD; |
|
ccw->count = sizeof(*vsq); |
|
ccw->flags |= CCW_FLAG_SLI; |
|
ccw->cda = (__u32)(addr_t)vsq; |
|
|
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
cqr->block = NULL; |
|
cqr->retries = 256; |
|
cqr->expires = device->default_expires * HZ; |
|
/* The command might not be supported. Suppress the error output */ |
|
__set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); |
|
|
|
rc = dasd_sleep_on_interruptible(cqr); |
|
if (rc == 0) { |
|
memcpy(&private->vsq, vsq, sizeof(*vsq)); |
|
} else { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
|
"Reading the volume storage information failed with rc=%d", rc); |
|
} |
|
|
|
if (useglobal) |
|
mutex_unlock(&dasd_vol_info_mutex); |
|
else |
|
dasd_sfree_request(cqr, cqr->memdev); |
|
|
|
return rc; |
|
} |
|
|
|
static int dasd_eckd_is_ese(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
|
|
return private->vsq.vol_info.ese; |
|
} |
|
|
|
static int dasd_eckd_ext_pool_id(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
|
|
return private->vsq.extent_pool_id; |
|
} |
|
|
|
/* |
|
* This value represents the total amount of available space. As more space is |
|
* allocated by ESE volumes, this value will decrease. |
|
* The data for this value is therefore updated on any call. |
|
*/ |
|
static int dasd_eckd_space_configured(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
int rc; |
|
|
|
rc = dasd_eckd_read_vol_info(device); |
|
|
|
return rc ? : private->vsq.space_configured; |
|
} |
|
|
|
/* |
|
* The value of space allocated by an ESE volume may have changed and is |
|
* therefore updated on any call. |
|
*/ |
|
static int dasd_eckd_space_allocated(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
int rc; |
|
|
|
rc = dasd_eckd_read_vol_info(device); |
|
|
|
return rc ? : private->vsq.space_allocated; |
|
} |
|
|
|
static int dasd_eckd_logical_capacity(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
|
|
return private->vsq.logical_capacity; |
|
} |
|
|
|
static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work) |
|
{ |
|
struct ext_pool_exhaust_work_data *data; |
|
struct dasd_device *device; |
|
struct dasd_device *base; |
|
|
|
data = container_of(work, struct ext_pool_exhaust_work_data, worker); |
|
device = data->device; |
|
base = data->base; |
|
|
|
if (!base) |
|
base = device; |
|
if (dasd_eckd_space_configured(base) != 0) { |
|
dasd_generic_space_avail(device); |
|
} else { |
|
dev_warn(&device->cdev->dev, "No space left in the extent pool\n"); |
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space"); |
|
} |
|
|
|
dasd_put_device(device); |
|
kfree(data); |
|
} |
|
|
|
static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device, |
|
struct dasd_ccw_req *cqr) |
|
{ |
|
struct ext_pool_exhaust_work_data *data; |
|
|
|
data = kzalloc(sizeof(*data), GFP_ATOMIC); |
|
if (!data) |
|
return -ENOMEM; |
|
INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work); |
|
dasd_get_device(device); |
|
data->device = device; |
|
|
|
if (cqr->block) |
|
data->base = cqr->block->base; |
|
else if (cqr->basedev) |
|
data->base = cqr->basedev; |
|
else |
|
data->base = NULL; |
|
|
|
schedule_work(&data->worker); |
|
|
|
return 0; |
|
} |
|
|
|
static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, |
|
struct dasd_rssd_lcq *lcq) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
int pool_id = dasd_eckd_ext_pool_id(device); |
|
struct dasd_ext_pool_sum eps; |
|
int i; |
|
|
|
for (i = 0; i < lcq->pool_count; i++) { |
|
eps = lcq->ext_pool_sum[i]; |
|
if (eps.pool_id == pool_id) { |
|
memcpy(&private->eps, &eps, |
|
sizeof(struct dasd_ext_pool_sum)); |
|
} |
|
} |
|
} |
|
|
|
/* Read Extent Pool Information - Logical Configuration Query */ |
|
static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
struct dasd_psf_prssd_data *prssdp; |
|
struct dasd_rssd_lcq *lcq; |
|
struct dasd_ccw_req *cqr; |
|
struct ccw1 *ccw; |
|
int rc; |
|
|
|
/* This command cannot be executed on an alias device */ |
|
if (private->uid.type == UA_BASE_PAV_ALIAS || |
|
private->uid.type == UA_HYPER_PAV_ALIAS) |
|
return 0; |
|
|
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, |
|
sizeof(*prssdp) + sizeof(*lcq), device, NULL); |
|
if (IS_ERR(cqr)) { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
|
"Could not allocate initialization request"); |
|
return PTR_ERR(cqr); |
|
} |
|
|
|
/* Prepare for Read Subsystem Data */ |
|
prssdp = cqr->data; |
|
memset(prssdp, 0, sizeof(*prssdp)); |
|
prssdp->order = PSF_ORDER_PRSSD; |
|
prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ |
|
|
|
ccw = cqr->cpaddr; |
|
ccw->cmd_code = DASD_ECKD_CCW_PSF; |
|
ccw->count = sizeof(*prssdp); |
|
ccw->flags |= CCW_FLAG_CC; |
|
ccw->cda = (__u32)(addr_t)prssdp; |
|
|
|
lcq = (struct dasd_rssd_lcq *)(prssdp + 1); |
|
memset(lcq, 0, sizeof(*lcq)); |
|
|
|
ccw++; |
|
ccw->cmd_code = DASD_ECKD_CCW_RSSD; |
|
ccw->count = sizeof(*lcq); |
|
ccw->flags |= CCW_FLAG_SLI; |
|
ccw->cda = (__u32)(addr_t)lcq; |
|
|
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
cqr->block = NULL; |
|
cqr->retries = 256; |
|
cqr->expires = device->default_expires * HZ; |
|
/* The command might not be supported. Suppress the error output */ |
|
__set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); |
|
|
|
rc = dasd_sleep_on_interruptible(cqr); |
|
if (rc == 0) { |
|
dasd_eckd_cpy_ext_pool_data(device, lcq); |
|
} else { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
|
"Reading the logical configuration failed with rc=%d", rc); |
|
} |
|
|
|
dasd_sfree_request(cqr, cqr->memdev); |
|
|
|
return rc; |
|
} |
|
|
|
/* |
|
* Depending on the device type, the extent size is specified either as |
|
* cylinders per extent (CKD) or size per extent (FBA) |
|
* A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. |
|
*/ |
|
static int dasd_eckd_ext_size(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
struct dasd_ext_pool_sum eps = private->eps; |
|
|
|
if (!eps.flags.extent_size_valid) |
|
return 0; |
|
if (eps.extent_size.size_1G) |
|
return 1113; |
|
if (eps.extent_size.size_16M) |
|
return 21; |
|
|
|
return 0; |
|
} |
|
|
|
static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
|
|
return private->eps.warn_thrshld; |
|
} |
|
|
|
static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
|
|
return private->eps.flags.capacity_at_warnlevel; |
|
} |
|
|
|
/* |
|
* Extent Pool out of space |
|
*/ |
|
static int dasd_eckd_ext_pool_oos(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
|
|
return private->eps.flags.pool_oos; |
|
} |
|
|
|
/* |
|
* Build CP for Perform Subsystem Function - SSC. |
|
*/ |
|
static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, |
|
int enable_pav) |
|
{ |
|
struct dasd_ccw_req *cqr; |
|
struct dasd_psf_ssc_data *psf_ssc_data; |
|
struct ccw1 *ccw; |
|
|
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , |
|
sizeof(struct dasd_psf_ssc_data), |
|
device, NULL); |
|
|
|
if (IS_ERR(cqr)) { |
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
|
"Could not allocate PSF-SSC request"); |
|
return cqr; |
|
} |
|
psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; |
|
psf_ssc_data->order = PSF_ORDER_SSC; |
|
psf_ssc_data->suborder = 0xc0; |
|
if (enable_pav) { |
|
psf_ssc_data->suborder |= 0x08; |
|
psf_ssc_data->reserved[0] = 0x88; |
|
} |
|
ccw = cqr->cpaddr; |
|
ccw->cmd_code = DASD_ECKD_CCW_PSF; |
|
ccw->cda = (__u32)(addr_t)psf_ssc_data; |
|
ccw->count = 66; |
|
|
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
cqr->block = NULL; |
|
cqr->retries = 256; |
|
cqr->expires = 10*HZ; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
return cqr; |
|
} |
|
|
|
/* |
|
* Perform Subsystem Function. |
|
* It is necessary to trigger CIO for channel revalidation since this |
|
* call might change behaviour of DASD devices. |
|
*/ |
|
static int |
|
dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, |
|
unsigned long flags) |
|
{ |
|
struct dasd_ccw_req *cqr; |
|
int rc; |
|
|
|
cqr = dasd_eckd_build_psf_ssc(device, enable_pav); |
|
if (IS_ERR(cqr)) |
|
return PTR_ERR(cqr); |
|
|
|
/* |
|
* set flags e.g. turn on failfast, to prevent blocking |
|
* the calling function should handle failed requests |
|
*/ |
|
cqr->flags |= flags; |
|
|
|
rc = dasd_sleep_on(cqr); |
|
if (!rc) |
|
/* trigger CIO to reprobe devices */ |
|
css_schedule_reprobe(); |
|
else if (cqr->intrc == -EAGAIN) |
|
rc = -EAGAIN; |
|
|
|
dasd_sfree_request(cqr, cqr->memdev); |
|
return rc; |
|
} |
|
|
|
/* |
|
* Valide storage server of current device. |
|
*/ |
|
static int dasd_eckd_validate_server(struct dasd_device *device, |
|
unsigned long flags) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
int enable_pav, rc; |
|
|
|
if (private->uid.type == UA_BASE_PAV_ALIAS || |
|
private->uid.type == UA_HYPER_PAV_ALIAS) |
|
return 0; |
|
if (dasd_nopav || MACHINE_IS_VM) |
|
enable_pav = 0; |
|
else |
|
enable_pav = 1; |
|
rc = dasd_eckd_psf_ssc(device, enable_pav, flags); |
|
|
|
/* may be requested feature is not available on server, |
|
* therefore just report error and go ahead */ |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " |
|
"returned rc=%d", private->uid.ssid, rc); |
|
return rc; |
|
} |
|
|
|
/* |
|
* worker to do a validate server in case of a lost pathgroup |
|
*/ |
|
static void dasd_eckd_do_validate_server(struct work_struct *work) |
|
{ |
|
struct dasd_device *device = container_of(work, struct dasd_device, |
|
kick_validate); |
|
unsigned long flags = 0; |
|
|
|
set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); |
|
if (dasd_eckd_validate_server(device, flags) |
|
== -EAGAIN) { |
|
/* schedule worker again if failed */ |
|
schedule_work(&device->kick_validate); |
|
return; |
|
} |
|
|
|
dasd_put_device(device); |
|
} |
|
|
|
static void dasd_eckd_kick_validate_server(struct dasd_device *device) |
|
{ |
|
dasd_get_device(device); |
|
/* exit if device not online or in offline processing */ |
|
if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || |
|
device->state < DASD_STATE_ONLINE) { |
|
dasd_put_device(device); |
|
return; |
|
} |
|
/* queue call to do_validate_server to the kernel event daemon. */ |
|
if (!schedule_work(&device->kick_validate)) |
|
dasd_put_device(device); |
|
} |
|
|
|
/* |
|
* Check device characteristics. |
|
* If the device is accessible using ECKD discipline, the device is enabled. |
|
*/ |
|
static int |
|
dasd_eckd_check_characteristics(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
struct dasd_block *block; |
|
struct dasd_uid temp_uid; |
|
int rc, i; |
|
int readonly; |
|
unsigned long value; |
|
|
|
/* setup work queue for validate server*/ |
|
INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); |
|
/* setup work queue for summary unit check */ |
|
INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); |
|
|
|
if (!ccw_device_is_pathgroup(device->cdev)) { |
|
dev_warn(&device->cdev->dev, |
|
"A channel path group could not be established\n"); |
|
return -EIO; |
|
} |
|
if (!ccw_device_is_multipath(device->cdev)) { |
|
dev_info(&device->cdev->dev, |
|
"The DASD is not operating in multipath mode\n"); |
|
} |
|
if (!private) { |
|
private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); |
|
if (!private) { |
|
dev_warn(&device->cdev->dev, |
|
"Allocating memory for private DASD data " |
|
"failed\n"); |
|
return -ENOMEM; |
|
} |
|
device->private = private; |
|
} else { |
|
memset(private, 0, sizeof(*private)); |
|
} |
|
/* Invalidate status of initial analysis. */ |
|
private->init_cqr_status = -1; |
|
/* Set default cache operations. */ |
|
private->attrib.operation = DASD_NORMAL_CACHE; |
|
private->attrib.nr_cyl = 0; |
|
|
|
/* Read Configuration Data */ |
|
rc = dasd_eckd_read_conf(device); |
|
if (rc) |
|
goto out_err1; |
|
|
|
/* set some default values */ |
|
device->default_expires = DASD_EXPIRES; |
|
device->default_retries = DASD_RETRIES; |
|
device->path_thrhld = DASD_ECKD_PATH_THRHLD; |
|
device->path_interval = DASD_ECKD_PATH_INTERVAL; |
|
|
|
if (private->gneq) { |
|
value = 1; |
|
for (i = 0; i < private->gneq->timeout.value; i++) |
|
value = 10 * value; |
|
value = value * private->gneq->timeout.number; |
|
/* do not accept useless values */ |
|
if (value != 0 && value <= DASD_EXPIRES_MAX) |
|
device->default_expires = value; |
|
} |
|
|
|
dasd_eckd_get_uid(device, &temp_uid); |
|
if (temp_uid.type == UA_BASE_DEVICE) { |
|
block = dasd_alloc_block(); |
|
if (IS_ERR(block)) { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
|
"could not allocate dasd " |
|
"block structure"); |
|
rc = PTR_ERR(block); |
|
goto out_err1; |
|
} |
|
device->block = block; |
|
block->base = device; |
|
} |
|
|
|
/* register lcu with alias handling, enable PAV */ |
|
rc = dasd_alias_make_device_known_to_lcu(device); |
|
if (rc) |
|
goto out_err2; |
|
|
|
dasd_eckd_validate_server(device, 0); |
|
|
|
/* device may report different configuration data after LCU setup */ |
|
rc = dasd_eckd_read_conf(device); |
|
if (rc) |
|
goto out_err3; |
|
|
|
dasd_path_create_kobjects(device); |
|
|
|
/* Read Feature Codes */ |
|
dasd_eckd_read_features(device); |
|
|
|
/* Read Volume Information */ |
|
dasd_eckd_read_vol_info(device); |
|
|
|
/* Read Extent Pool Information */ |
|
dasd_eckd_read_ext_pool_info(device); |
|
|
|
/* Read Device Characteristics */ |
|
rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
|
&private->rdc_data, 64); |
|
if (rc) { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
|
"Read device characteristic failed, rc=%d", rc); |
|
goto out_err3; |
|
} |
|
|
|
if ((device->features & DASD_FEATURE_USERAW) && |
|
!(private->rdc_data.facilities.RT_in_LR)) { |
|
dev_err(&device->cdev->dev, "The storage server does not " |
|
"support raw-track access\n"); |
|
rc = -EINVAL; |
|
goto out_err3; |
|
} |
|
|
|
/* find the valid cylinder size */ |
|
if (private->rdc_data.no_cyl == LV_COMPAT_CYL && |
|
private->rdc_data.long_no_cyl) |
|
private->real_cyl = private->rdc_data.long_no_cyl; |
|
else |
|
private->real_cyl = private->rdc_data.no_cyl; |
|
|
|
private->fcx_max_data = get_fcx_max_data(device); |
|
|
|
readonly = dasd_device_is_ro(device); |
|
if (readonly) |
|
set_bit(DASD_FLAG_DEVICE_RO, &device->flags); |
|
|
|
dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " |
|
"with %d cylinders, %d heads, %d sectors%s\n", |
|
private->rdc_data.dev_type, |
|
private->rdc_data.dev_model, |
|
private->rdc_data.cu_type, |
|
private->rdc_data.cu_model.model, |
|
private->real_cyl, |
|
private->rdc_data.trk_per_cyl, |
|
private->rdc_data.sec_per_trk, |
|
readonly ? ", read-only device" : ""); |
|
return 0; |
|
|
|
out_err3: |
|
dasd_alias_disconnect_device_from_lcu(device); |
|
out_err2: |
|
dasd_free_block(device->block); |
|
device->block = NULL; |
|
out_err1: |
|
dasd_eckd_clear_conf_data(device); |
|
dasd_path_remove_kobjects(device); |
|
kfree(device->private); |
|
device->private = NULL; |
|
return rc; |
|
} |
|
|
|
static void dasd_eckd_uncheck_device(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
|
|
if (!private) |
|
return; |
|
|
|
dasd_alias_disconnect_device_from_lcu(device); |
|
private->ned = NULL; |
|
private->sneq = NULL; |
|
private->vdsneq = NULL; |
|
private->gneq = NULL; |
|
dasd_eckd_clear_conf_data(device); |
|
dasd_path_remove_kobjects(device); |
|
} |
|
|
|
static struct dasd_ccw_req * |
|
dasd_eckd_analysis_ccw(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
struct eckd_count *count_data; |
|
struct LO_eckd_data *LO_data; |
|
struct dasd_ccw_req *cqr; |
|
struct ccw1 *ccw; |
|
int cplength, datasize; |
|
int i; |
|
|
|
cplength = 8; |
|
datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); |
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, |
|
NULL); |
|
if (IS_ERR(cqr)) |
|
return cqr; |
|
ccw = cqr->cpaddr; |
|
/* Define extent for the first 2 tracks. */ |
|
define_extent(ccw++, cqr->data, 0, 1, |
|
DASD_ECKD_CCW_READ_COUNT, device, 0); |
|
LO_data = cqr->data + sizeof(struct DE_eckd_data); |
|
/* Locate record for the first 4 records on track 0. */ |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
locate_record(ccw++, LO_data++, 0, 0, 4, |
|
DASD_ECKD_CCW_READ_COUNT, device, 0); |
|
|
|
count_data = private->count_area; |
|
for (i = 0; i < 4; i++) { |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; |
|
ccw->flags = 0; |
|
ccw->count = 8; |
|
ccw->cda = (__u32)(addr_t) count_data; |
|
ccw++; |
|
count_data++; |
|
} |
|
|
|
/* Locate record for the first record on track 1. */ |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
locate_record(ccw++, LO_data++, 1, 0, 1, |
|
DASD_ECKD_CCW_READ_COUNT, device, 0); |
|
/* Read count ccw. */ |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; |
|
ccw->flags = 0; |
|
ccw->count = 8; |
|
ccw->cda = (__u32)(addr_t) count_data; |
|
|
|
cqr->block = NULL; |
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
cqr->retries = 255; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
/* Set flags to suppress output for expected errors */ |
|
set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); |
|
|
|
return cqr; |
|
} |
|
|
|
/* differentiate between 'no record found' and any other error */ |
|
static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) |
|
{ |
|
char *sense; |
|
if (init_cqr->status == DASD_CQR_DONE) |
|
return INIT_CQR_OK; |
|
else if (init_cqr->status == DASD_CQR_NEED_ERP || |
|
init_cqr->status == DASD_CQR_FAILED) { |
|
sense = dasd_get_sense(&init_cqr->irb); |
|
if (sense && (sense[1] & SNS1_NO_REC_FOUND)) |
|
return INIT_CQR_UNFORMATTED; |
|
else |
|
return INIT_CQR_ERROR; |
|
} else |
|
return INIT_CQR_ERROR; |
|
} |
|
|
|
/* |
|
* This is the callback function for the init_analysis cqr. It saves |
|
* the status of the initial analysis ccw before it frees it and kicks |
|
* the device to continue the startup sequence. This will call |
|
* dasd_eckd_do_analysis again (if the devices has not been marked |
|
* for deletion in the meantime). |
|
*/ |
|
static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, |
|
void *data) |
|
{ |
|
struct dasd_device *device = init_cqr->startdev; |
|
struct dasd_eckd_private *private = device->private; |
|
|
|
private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); |
|
dasd_sfree_request(init_cqr, device); |
|
dasd_kick_device(device); |
|
} |
|
|
|
static int dasd_eckd_start_analysis(struct dasd_block *block) |
|
{ |
|
struct dasd_ccw_req *init_cqr; |
|
|
|
init_cqr = dasd_eckd_analysis_ccw(block->base); |
|
if (IS_ERR(init_cqr)) |
|
return PTR_ERR(init_cqr); |
|
init_cqr->callback = dasd_eckd_analysis_callback; |
|
init_cqr->callback_data = NULL; |
|
init_cqr->expires = 5*HZ; |
|
/* first try without ERP, so we can later handle unformatted |
|
* devices as special case |
|
*/ |
|
clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); |
|
init_cqr->retries = 0; |
|
dasd_add_request_head(init_cqr); |
|
return -EAGAIN; |
|
} |
|
|
|
static int dasd_eckd_end_analysis(struct dasd_block *block) |
|
{ |
|
struct dasd_device *device = block->base; |
|
struct dasd_eckd_private *private = device->private; |
|
struct eckd_count *count_area; |
|
unsigned int sb, blk_per_trk; |
|
int status, i; |
|
struct dasd_ccw_req *init_cqr; |
|
|
|
status = private->init_cqr_status; |
|
private->init_cqr_status = -1; |
|
if (status == INIT_CQR_ERROR) { |
|
/* try again, this time with full ERP */ |
|
init_cqr = dasd_eckd_analysis_ccw(device); |
|
dasd_sleep_on(init_cqr); |
|
status = dasd_eckd_analysis_evaluation(init_cqr); |
|
dasd_sfree_request(init_cqr, device); |
|
} |
|
|
|
if (device->features & DASD_FEATURE_USERAW) { |
|
block->bp_block = DASD_RAW_BLOCKSIZE; |
|
blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; |
|
block->s2b_shift = 3; |
|
goto raw; |
|
} |
|
|
|
if (status == INIT_CQR_UNFORMATTED) { |
|
dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); |
|
return -EMEDIUMTYPE; |
|
} else if (status == INIT_CQR_ERROR) { |
|
dev_err(&device->cdev->dev, |
|
"Detecting the DASD disk layout failed because " |
|
"of an I/O error\n"); |
|
return -EIO; |
|
} |
|
|
|
private->uses_cdl = 1; |
|
/* Check Track 0 for Compatible Disk Layout */ |
|
count_area = NULL; |
|
for (i = 0; i < 3; i++) { |
|
if (private->count_area[i].kl != 4 || |
|
private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || |
|
private->count_area[i].cyl != 0 || |
|
private->count_area[i].head != count_area_head[i] || |
|
private->count_area[i].record != count_area_rec[i]) { |
|
private->uses_cdl = 0; |
|
break; |
|
} |
|
} |
|
if (i == 3) |
|
count_area = &private->count_area[3]; |
|
|
|
if (private->uses_cdl == 0) { |
|
for (i = 0; i < 5; i++) { |
|
if ((private->count_area[i].kl != 0) || |
|
(private->count_area[i].dl != |
|
private->count_area[0].dl) || |
|
private->count_area[i].cyl != 0 || |
|
private->count_area[i].head != count_area_head[i] || |
|
private->count_area[i].record != count_area_rec[i]) |
|
break; |
|
} |
|
if (i == 5) |
|
count_area = &private->count_area[0]; |
|
} else { |
|
if (private->count_area[3].record == 1) |
|
dev_warn(&device->cdev->dev, |
|
"Track 0 has no records following the VTOC\n"); |
|
} |
|
|
|
if (count_area != NULL && count_area->kl == 0) { |
|
/* we found notthing violating our disk layout */ |
|
if (dasd_check_blocksize(count_area->dl) == 0) |
|
block->bp_block = count_area->dl; |
|
} |
|
if (block->bp_block == 0) { |
|
dev_warn(&device->cdev->dev, |
|
"The disk layout of the DASD is not supported\n"); |
|
return -EMEDIUMTYPE; |
|
} |
|
block->s2b_shift = 0; /* bits to shift 512 to get a block */ |
|
for (sb = 512; sb < block->bp_block; sb = sb << 1) |
|
block->s2b_shift++; |
|
|
|
blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); |
|
|
|
raw: |
|
block->blocks = ((unsigned long) private->real_cyl * |
|
private->rdc_data.trk_per_cyl * |
|
blk_per_trk); |
|
|
|
dev_info(&device->cdev->dev, |
|
"DASD with %u KB/block, %lu KB total size, %u KB/track, " |
|
"%s\n", (block->bp_block >> 10), |
|
(((unsigned long) private->real_cyl * |
|
private->rdc_data.trk_per_cyl * |
|
blk_per_trk * (block->bp_block >> 9)) >> 1), |
|
((blk_per_trk * block->bp_block) >> 10), |
|
private->uses_cdl ? |
|
"compatible disk layout" : "linux disk layout"); |
|
|
|
return 0; |
|
} |
|
|
|
static int dasd_eckd_do_analysis(struct dasd_block *block) |
|
{ |
|
struct dasd_eckd_private *private = block->base->private; |
|
|
|
if (private->init_cqr_status < 0) |
|
return dasd_eckd_start_analysis(block); |
|
else |
|
return dasd_eckd_end_analysis(block); |
|
} |
|
|
|
static int dasd_eckd_basic_to_ready(struct dasd_device *device) |
|
{ |
|
return dasd_alias_add_device(device); |
|
}; |
|
|
|
static int dasd_eckd_online_to_ready(struct dasd_device *device) |
|
{ |
|
if (cancel_work_sync(&device->reload_device)) |
|
dasd_put_device(device); |
|
if (cancel_work_sync(&device->kick_validate)) |
|
dasd_put_device(device); |
|
|
|
return 0; |
|
}; |
|
|
|
static int dasd_eckd_basic_to_known(struct dasd_device *device) |
|
{ |
|
return dasd_alias_remove_device(device); |
|
}; |
|
|
|
static int |
|
dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) |
|
{ |
|
struct dasd_eckd_private *private = block->base->private; |
|
|
|
if (dasd_check_blocksize(block->bp_block) == 0) { |
|
geo->sectors = recs_per_track(&private->rdc_data, |
|
0, block->bp_block); |
|
} |
|
geo->cylinders = private->rdc_data.no_cyl; |
|
geo->heads = private->rdc_data.trk_per_cyl; |
|
return 0; |
|
} |
|
|
|
/* |
|
* Build the TCW request for the format check |
|
*/ |
|
static struct dasd_ccw_req * |
|
dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, |
|
int enable_pav, struct eckd_count *fmt_buffer, |
|
int rpt) |
|
{ |
|
struct dasd_eckd_private *start_priv; |
|
struct dasd_device *startdev = NULL; |
|
struct tidaw *last_tidaw = NULL; |
|
struct dasd_ccw_req *cqr; |
|
struct itcw *itcw; |
|
int itcw_size; |
|
int count; |
|
int rc; |
|
int i; |
|
|
|
if (enable_pav) |
|
startdev = dasd_alias_get_start_dev(base); |
|
|
|
if (!startdev) |
|
startdev = base; |
|
|
|
start_priv = startdev->private; |
|
|
|
count = rpt * (fdata->stop_unit - fdata->start_unit + 1); |
|
|
|
/* |
|
* we're adding 'count' amount of tidaw to the itcw. |
|
* calculate the corresponding itcw_size |
|
*/ |
|
itcw_size = itcw_calc_size(0, count, 0); |
|
|
|
cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); |
|
if (IS_ERR(cqr)) |
|
return cqr; |
|
|
|
start_priv->count++; |
|
|
|
itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); |
|
if (IS_ERR(itcw)) { |
|
rc = -EINVAL; |
|
goto out_err; |
|
} |
|
|
|
cqr->cpaddr = itcw_get_tcw(itcw); |
|
rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, |
|
DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, |
|
sizeof(struct eckd_count), |
|
count * sizeof(struct eckd_count), 0, rpt); |
|
if (rc) |
|
goto out_err; |
|
|
|
for (i = 0; i < count; i++) { |
|
last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, |
|
sizeof(struct eckd_count)); |
|
if (IS_ERR(last_tidaw)) { |
|
rc = -EINVAL; |
|
goto out_err; |
|
} |
|
} |
|
|
|
last_tidaw->flags |= TIDAW_FLAGS_LAST; |
|
itcw_finalize(itcw); |
|
|
|
cqr->cpmode = 1; |
|
cqr->startdev = startdev; |
|
cqr->memdev = startdev; |
|
cqr->basedev = base; |
|
cqr->retries = startdev->default_retries; |
|
cqr->expires = startdev->default_expires * HZ; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
/* Set flags to suppress output for expected errors */ |
|
set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); |
|
set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); |
|
|
|
return cqr; |
|
|
|
out_err: |
|
dasd_sfree_request(cqr, startdev); |
|
|
|
return ERR_PTR(rc); |
|
} |
|
|
|
/* |
|
* Build the CCW request for the format check |
|
*/ |
|
static struct dasd_ccw_req * |
|
dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, |
|
int enable_pav, struct eckd_count *fmt_buffer, int rpt) |
|
{ |
|
struct dasd_eckd_private *start_priv; |
|
struct dasd_eckd_private *base_priv; |
|
struct dasd_device *startdev = NULL; |
|
struct dasd_ccw_req *cqr; |
|
struct ccw1 *ccw; |
|
void *data; |
|
int cplength, datasize; |
|
int use_prefix; |
|
int count; |
|
int i; |
|
|
|
if (enable_pav) |
|
startdev = dasd_alias_get_start_dev(base); |
|
|
|
if (!startdev) |
|
startdev = base; |
|
|
|
start_priv = startdev->private; |
|
base_priv = base->private; |
|
|
|
count = rpt * (fdata->stop_unit - fdata->start_unit + 1); |
|
|
|
use_prefix = base_priv->features.feature[8] & 0x01; |
|
|
|
if (use_prefix) { |
|
cplength = 1; |
|
datasize = sizeof(struct PFX_eckd_data); |
|
} else { |
|
cplength = 2; |
|
datasize = sizeof(struct DE_eckd_data) + |
|
sizeof(struct LO_eckd_data); |
|
} |
|
cplength += count; |
|
|
|
cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); |
|
if (IS_ERR(cqr)) |
|
return cqr; |
|
|
|
start_priv->count++; |
|
data = cqr->data; |
|
ccw = cqr->cpaddr; |
|
|
|
if (use_prefix) { |
|
prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, |
|
DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, |
|
count, 0, 0); |
|
} else { |
|
define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, |
|
DASD_ECKD_CCW_READ_COUNT, startdev, 0); |
|
|
|
data += sizeof(struct DE_eckd_data); |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
|
|
locate_record(ccw++, data, fdata->start_unit, 0, count, |
|
DASD_ECKD_CCW_READ_COUNT, base, 0); |
|
} |
|
|
|
for (i = 0; i < count; i++) { |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; |
|
ccw->flags = CCW_FLAG_SLI; |
|
ccw->count = 8; |
|
ccw->cda = (__u32)(addr_t) fmt_buffer; |
|
ccw++; |
|
fmt_buffer++; |
|
} |
|
|
|
cqr->startdev = startdev; |
|
cqr->memdev = startdev; |
|
cqr->basedev = base; |
|
cqr->retries = DASD_RETRIES; |
|
cqr->expires = startdev->default_expires * HZ; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
/* Set flags to suppress output for expected errors */ |
|
set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); |
|
|
|
return cqr; |
|
} |
|
|
|
static struct dasd_ccw_req * |
|
dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, |
|
struct format_data_t *fdata, int enable_pav) |
|
{ |
|
struct dasd_eckd_private *base_priv; |
|
struct dasd_eckd_private *start_priv; |
|
struct dasd_ccw_req *fcp; |
|
struct eckd_count *ect; |
|
struct ch_t address; |
|
struct ccw1 *ccw; |
|
void *data; |
|
int rpt; |
|
int cplength, datasize; |
|
int i, j; |
|
int intensity = 0; |
|
int r0_perm; |
|
int nr_tracks; |
|
int use_prefix; |
|
|
|
if (enable_pav) |
|
startdev = dasd_alias_get_start_dev(base); |
|
|
|
if (!startdev) |
|
startdev = base; |
|
|
|
start_priv = startdev->private; |
|
base_priv = base->private; |
|
|
|
rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); |
|
|
|
nr_tracks = fdata->stop_unit - fdata->start_unit + 1; |
|
|
|
/* |
|
* fdata->intensity is a bit string that tells us what to do: |
|
* Bit 0: write record zero |
|
* Bit 1: write home address, currently not supported |
|
* Bit 2: invalidate tracks |
|
* Bit 3: use OS/390 compatible disk layout (cdl) |
|
* Bit 4: do not allow storage subsystem to modify record zero |
|
* Only some bit combinations do make sense. |
|
*/ |
|
if (fdata->intensity & 0x10) { |
|
r0_perm = 0; |
|
intensity = fdata->intensity & ~0x10; |
|
} else { |
|
r0_perm = 1; |
|
intensity = fdata->intensity; |
|
} |
|
|
|
use_prefix = base_priv->features.feature[8] & 0x01; |
|
|
|
switch (intensity) { |
|
case 0x00: /* Normal format */ |
|
case 0x08: /* Normal format, use cdl. */ |
|
cplength = 2 + (rpt*nr_tracks); |
|
if (use_prefix) |
|
datasize = sizeof(struct PFX_eckd_data) + |
|
sizeof(struct LO_eckd_data) + |
|
rpt * nr_tracks * sizeof(struct eckd_count); |
|
else |
|
datasize = sizeof(struct DE_eckd_data) + |
|
sizeof(struct LO_eckd_data) + |
|
rpt * nr_tracks * sizeof(struct eckd_count); |
|
break; |
|
case 0x01: /* Write record zero and format track. */ |
|
case 0x09: /* Write record zero and format track, use cdl. */ |
|
cplength = 2 + rpt * nr_tracks; |
|
if (use_prefix) |
|
datasize = sizeof(struct PFX_eckd_data) + |
|
sizeof(struct LO_eckd_data) + |
|
sizeof(struct eckd_count) + |
|
rpt * nr_tracks * sizeof(struct eckd_count); |
|
else |
|
datasize = sizeof(struct DE_eckd_data) + |
|
sizeof(struct LO_eckd_data) + |
|
sizeof(struct eckd_count) + |
|
rpt * nr_tracks * sizeof(struct eckd_count); |
|
break; |
|
case 0x04: /* Invalidate track. */ |
|
case 0x0c: /* Invalidate track, use cdl. */ |
|
cplength = 3; |
|
if (use_prefix) |
|
datasize = sizeof(struct PFX_eckd_data) + |
|
sizeof(struct LO_eckd_data) + |
|
sizeof(struct eckd_count); |
|
else |
|
datasize = sizeof(struct DE_eckd_data) + |
|
sizeof(struct LO_eckd_data) + |
|
sizeof(struct eckd_count); |
|
break; |
|
default: |
|
dev_warn(&startdev->cdev->dev, |
|
"An I/O control call used incorrect flags 0x%x\n", |
|
fdata->intensity); |
|
return ERR_PTR(-EINVAL); |
|
} |
|
|
|
fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); |
|
if (IS_ERR(fcp)) |
|
return fcp; |
|
|
|
start_priv->count++; |
|
data = fcp->data; |
|
ccw = fcp->cpaddr; |
|
|
|
switch (intensity & ~0x08) { |
|
case 0x00: /* Normal format. */ |
|
if (use_prefix) { |
|
prefix(ccw++, (struct PFX_eckd_data *) data, |
|
fdata->start_unit, fdata->stop_unit, |
|
DASD_ECKD_CCW_WRITE_CKD, base, startdev); |
|
/* grant subsystem permission to format R0 */ |
|
if (r0_perm) |
|
((struct PFX_eckd_data *)data) |
|
->define_extent.ga_extended |= 0x04; |
|
data += sizeof(struct PFX_eckd_data); |
|
} else { |
|
define_extent(ccw++, (struct DE_eckd_data *) data, |
|
fdata->start_unit, fdata->stop_unit, |
|
DASD_ECKD_CCW_WRITE_CKD, startdev, 0); |
|
/* grant subsystem permission to format R0 */ |
|
if (r0_perm) |
|
((struct DE_eckd_data *) data) |
|
->ga_extended |= 0x04; |
|
data += sizeof(struct DE_eckd_data); |
|
} |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
locate_record(ccw++, (struct LO_eckd_data *) data, |
|
fdata->start_unit, 0, rpt*nr_tracks, |
|
DASD_ECKD_CCW_WRITE_CKD, base, |
|
fdata->blksize); |
|
data += sizeof(struct LO_eckd_data); |
|
break; |
|
case 0x01: /* Write record zero + format track. */ |
|
if (use_prefix) { |
|
prefix(ccw++, (struct PFX_eckd_data *) data, |
|
fdata->start_unit, fdata->stop_unit, |
|
DASD_ECKD_CCW_WRITE_RECORD_ZERO, |
|
base, startdev); |
|
data += sizeof(struct PFX_eckd_data); |
|
} else { |
|
define_extent(ccw++, (struct DE_eckd_data *) data, |
|
fdata->start_unit, fdata->stop_unit, |
|
DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); |
|
data += sizeof(struct DE_eckd_data); |
|
} |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
locate_record(ccw++, (struct LO_eckd_data *) data, |
|
fdata->start_unit, 0, rpt * nr_tracks + 1, |
|
DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, |
|
base->block->bp_block); |
|
data += sizeof(struct LO_eckd_data); |
|
break; |
|
case 0x04: /* Invalidate track. */ |
|
if (use_prefix) { |
|
prefix(ccw++, (struct PFX_eckd_data *) data, |
|
fdata->start_unit, fdata->stop_unit, |
|
DASD_ECKD_CCW_WRITE_CKD, base, startdev); |
|
data += sizeof(struct PFX_eckd_data); |
|
} else { |
|
define_extent(ccw++, (struct DE_eckd_data *) data, |
|
fdata->start_unit, fdata->stop_unit, |
|
DASD_ECKD_CCW_WRITE_CKD, startdev, 0); |
|
data += sizeof(struct DE_eckd_data); |
|
} |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
locate_record(ccw++, (struct LO_eckd_data *) data, |
|
fdata->start_unit, 0, 1, |
|
DASD_ECKD_CCW_WRITE_CKD, base, 8); |
|
data += sizeof(struct LO_eckd_data); |
|
break; |
|
} |
|
|
|
for (j = 0; j < nr_tracks; j++) { |
|
/* calculate cylinder and head for the current track */ |
|
set_ch_t(&address, |
|
(fdata->start_unit + j) / |
|
base_priv->rdc_data.trk_per_cyl, |
|
(fdata->start_unit + j) % |
|
base_priv->rdc_data.trk_per_cyl); |
|
if (intensity & 0x01) { /* write record zero */ |
|
ect = (struct eckd_count *) data; |
|
data += sizeof(struct eckd_count); |
|
ect->cyl = address.cyl; |
|
ect->head = address.head; |
|
ect->record = 0; |
|
ect->kl = 0; |
|
ect->dl = 8; |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; |
|
ccw->flags = CCW_FLAG_SLI; |
|
ccw->count = 8; |
|
ccw->cda = (__u32)(addr_t) ect; |
|
ccw++; |
|
} |
|
if ((intensity & ~0x08) & 0x04) { /* erase track */ |
|
ect = (struct eckd_count *) data; |
|
data += sizeof(struct eckd_count); |
|
ect->cyl = address.cyl; |
|
ect->head = address.head; |
|
ect->record = 1; |
|
ect->kl = 0; |
|
ect->dl = 0; |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; |
|
ccw->flags = CCW_FLAG_SLI; |
|
ccw->count = 8; |
|
ccw->cda = (__u32)(addr_t) ect; |
|
} else { /* write remaining records */ |
|
for (i = 0; i < rpt; i++) { |
|
ect = (struct eckd_count *) data; |
|
data += sizeof(struct eckd_count); |
|
ect->cyl = address.cyl; |
|
ect->head = address.head; |
|
ect->record = i + 1; |
|
ect->kl = 0; |
|
ect->dl = fdata->blksize; |
|
/* |
|
* Check for special tracks 0-1 |
|
* when formatting CDL |
|
*/ |
|
if ((intensity & 0x08) && |
|
address.cyl == 0 && address.head == 0) { |
|
if (i < 3) { |
|
ect->kl = 4; |
|
ect->dl = sizes_trk0[i] - 4; |
|
} |
|
} |
|
if ((intensity & 0x08) && |
|
address.cyl == 0 && address.head == 1) { |
|
ect->kl = 44; |
|
ect->dl = LABEL_SIZE - 44; |
|
} |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
if (i != 0 || j == 0) |
|
ccw->cmd_code = |
|
DASD_ECKD_CCW_WRITE_CKD; |
|
else |
|
ccw->cmd_code = |
|
DASD_ECKD_CCW_WRITE_CKD_MT; |
|
ccw->flags = CCW_FLAG_SLI; |
|
ccw->count = 8; |
|
ccw->cda = (__u32)(addr_t) ect; |
|
ccw++; |
|
} |
|
} |
|
} |
|
|
|
fcp->startdev = startdev; |
|
fcp->memdev = startdev; |
|
fcp->basedev = base; |
|
fcp->retries = 256; |
|
fcp->expires = startdev->default_expires * HZ; |
|
fcp->buildclk = get_tod_clock(); |
|
fcp->status = DASD_CQR_FILLED; |
|
|
|
return fcp; |
|
} |
|
|
|
/* |
|
* Wrapper function to build a CCW request depending on input data |
|
*/ |
|
static struct dasd_ccw_req * |
|
dasd_eckd_format_build_ccw_req(struct dasd_device *base, |
|
struct format_data_t *fdata, int enable_pav, |
|
int tpm, struct eckd_count *fmt_buffer, int rpt) |
|
{ |
|
struct dasd_ccw_req *ccw_req; |
|
|
|
if (!fmt_buffer) { |
|
ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); |
|
} else { |
|
if (tpm) |
|
ccw_req = dasd_eckd_build_check_tcw(base, fdata, |
|
enable_pav, |
|
fmt_buffer, rpt); |
|
else |
|
ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, |
|
fmt_buffer, rpt); |
|
} |
|
|
|
return ccw_req; |
|
} |
|
|
|
/* |
|
* Sanity checks on format_data |
|
*/ |
|
static int dasd_eckd_format_sanity_checks(struct dasd_device *base, |
|
struct format_data_t *fdata) |
|
{ |
|
struct dasd_eckd_private *private = base->private; |
|
|
|
if (fdata->start_unit >= |
|
(private->real_cyl * private->rdc_data.trk_per_cyl)) { |
|
dev_warn(&base->cdev->dev, |
|
"Start track number %u used in formatting is too big\n", |
|
fdata->start_unit); |
|
return -EINVAL; |
|
} |
|
if (fdata->stop_unit >= |
|
(private->real_cyl * private->rdc_data.trk_per_cyl)) { |
|
dev_warn(&base->cdev->dev, |
|
"Stop track number %u used in formatting is too big\n", |
|
fdata->stop_unit); |
|
return -EINVAL; |
|
} |
|
if (fdata->start_unit > fdata->stop_unit) { |
|
dev_warn(&base->cdev->dev, |
|
"Start track %u used in formatting exceeds end track\n", |
|
fdata->start_unit); |
|
return -EINVAL; |
|
} |
|
if (dasd_check_blocksize(fdata->blksize) != 0) { |
|
dev_warn(&base->cdev->dev, |
|
"The DASD cannot be formatted with block size %u\n", |
|
fdata->blksize); |
|
return -EINVAL; |
|
} |
|
return 0; |
|
} |
|
|
|
/* |
|
* This function will process format_data originally coming from an IOCTL |
|
*/ |
|
static int dasd_eckd_format_process_data(struct dasd_device *base, |
|
struct format_data_t *fdata, |
|
int enable_pav, int tpm, |
|
struct eckd_count *fmt_buffer, int rpt, |
|
struct irb *irb) |
|
{ |
|
struct dasd_eckd_private *private = base->private; |
|
struct dasd_ccw_req *cqr, *n; |
|
struct list_head format_queue; |
|
struct dasd_device *device; |
|
char *sense = NULL; |
|
int old_start, old_stop, format_step; |
|
int step, retry; |
|
int rc; |
|
|
|
rc = dasd_eckd_format_sanity_checks(base, fdata); |
|
if (rc) |
|
return rc; |
|
|
|
INIT_LIST_HEAD(&format_queue); |
|
|
|
old_start = fdata->start_unit; |
|
old_stop = fdata->stop_unit; |
|
|
|
if (!tpm && fmt_buffer != NULL) { |
|
/* Command Mode / Format Check */ |
|
format_step = 1; |
|
} else if (tpm && fmt_buffer != NULL) { |
|
/* Transport Mode / Format Check */ |
|
format_step = DASD_CQR_MAX_CCW / rpt; |
|
} else { |
|
/* Normal Formatting */ |
|
format_step = DASD_CQR_MAX_CCW / |
|
recs_per_track(&private->rdc_data, 0, fdata->blksize); |
|
} |
|
|
|
do { |
|
retry = 0; |
|
while (fdata->start_unit <= old_stop) { |
|
step = fdata->stop_unit - fdata->start_unit + 1; |
|
if (step > format_step) { |
|
fdata->stop_unit = |
|
fdata->start_unit + format_step - 1; |
|
} |
|
|
|
cqr = dasd_eckd_format_build_ccw_req(base, fdata, |
|
enable_pav, tpm, |
|
fmt_buffer, rpt); |
|
if (IS_ERR(cqr)) { |
|
rc = PTR_ERR(cqr); |
|
if (rc == -ENOMEM) { |
|
if (list_empty(&format_queue)) |
|
goto out; |
|
/* |
|
* not enough memory available, start |
|
* requests retry after first requests |
|
* were finished |
|
*/ |
|
retry = 1; |
|
break; |
|
} |
|
goto out_err; |
|
} |
|
list_add_tail(&cqr->blocklist, &format_queue); |
|
|
|
if (fmt_buffer) { |
|
step = fdata->stop_unit - fdata->start_unit + 1; |
|
fmt_buffer += rpt * step; |
|
} |
|
fdata->start_unit = fdata->stop_unit + 1; |
|
fdata->stop_unit = old_stop; |
|
} |
|
|
|
rc = dasd_sleep_on_queue(&format_queue); |
|
|
|
out_err: |
|
list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { |
|
device = cqr->startdev; |
|
private = device->private; |
|
|
|
if (cqr->status == DASD_CQR_FAILED) { |
|
/* |
|
* Only get sense data if called by format |
|
* check |
|
*/ |
|
if (fmt_buffer && irb) { |
|
sense = dasd_get_sense(&cqr->irb); |
|
memcpy(irb, &cqr->irb, sizeof(*irb)); |
|
} |
|
rc = -EIO; |
|
} |
|
list_del_init(&cqr->blocklist); |
|
dasd_ffree_request(cqr, device); |
|
private->count--; |
|
} |
|
|
|
if (rc && rc != -EIO) |
|
goto out; |
|
if (rc == -EIO) { |
|
/* |
|
* In case fewer than the expected records are on the |
|
* track, we will most likely get a 'No Record Found' |
|
* error (in command mode) or a 'File Protected' error |
|
* (in transport mode). Those particular cases shouldn't |
|
* pass the -EIO to the IOCTL, therefore reset the rc |
|
* and continue. |
|
*/ |
|
if (sense && |
|
(sense[1] & SNS1_NO_REC_FOUND || |
|
sense[1] & SNS1_FILE_PROTECTED)) |
|
retry = 1; |
|
else |
|
goto out; |
|
} |
|
|
|
} while (retry); |
|
|
|
out: |
|
fdata->start_unit = old_start; |
|
fdata->stop_unit = old_stop; |
|
|
|
return rc; |
|
} |
|
|
|
static int dasd_eckd_format_device(struct dasd_device *base, |
|
struct format_data_t *fdata, int enable_pav) |
|
{ |
|
return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, |
|
0, NULL); |
|
} |
|
|
|
static bool test_and_set_format_track(struct dasd_format_entry *to_format, |
|
struct dasd_block *block) |
|
{ |
|
struct dasd_format_entry *format; |
|
unsigned long flags; |
|
bool rc = false; |
|
|
|
spin_lock_irqsave(&block->format_lock, flags); |
|
list_for_each_entry(format, &block->format_list, list) { |
|
if (format->track == to_format->track) { |
|
rc = true; |
|
goto out; |
|
} |
|
} |
|
list_add_tail(&to_format->list, &block->format_list); |
|
|
|
out: |
|
spin_unlock_irqrestore(&block->format_lock, flags); |
|
return rc; |
|
} |
|
|
|
static void clear_format_track(struct dasd_format_entry *format, |
|
struct dasd_block *block) |
|
{ |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&block->format_lock, flags); |
|
list_del_init(&format->list); |
|
spin_unlock_irqrestore(&block->format_lock, flags); |
|
} |
|
|
|
/* |
|
* Callback function to free ESE format requests. |
|
*/ |
|
static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) |
|
{ |
|
struct dasd_device *device = cqr->startdev; |
|
struct dasd_eckd_private *private = device->private; |
|
struct dasd_format_entry *format = data; |
|
|
|
clear_format_track(format, cqr->basedev->block); |
|
private->count--; |
|
dasd_ffree_request(cqr, device); |
|
} |
|
|
|
static struct dasd_ccw_req * |
|
dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr, |
|
struct irb *irb) |
|
{ |
|
struct dasd_eckd_private *private; |
|
struct dasd_format_entry *format; |
|
struct format_data_t fdata; |
|
unsigned int recs_per_trk; |
|
struct dasd_ccw_req *fcqr; |
|
struct dasd_device *base; |
|
struct dasd_block *block; |
|
unsigned int blksize; |
|
struct request *req; |
|
sector_t first_trk; |
|
sector_t last_trk; |
|
sector_t curr_trk; |
|
int rc; |
|
|
|
req = cqr->callback_data; |
|
block = cqr->block; |
|
base = block->base; |
|
private = base->private; |
|
blksize = block->bp_block; |
|
recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
|
format = &startdev->format_entry; |
|
|
|
first_trk = blk_rq_pos(req) >> block->s2b_shift; |
|
sector_div(first_trk, recs_per_trk); |
|
last_trk = |
|
(blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; |
|
sector_div(last_trk, recs_per_trk); |
|
rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); |
|
if (rc) |
|
return ERR_PTR(rc); |
|
|
|
if (curr_trk < first_trk || curr_trk > last_trk) { |
|
DBF_DEV_EVENT(DBF_WARNING, startdev, |
|
"ESE error track %llu not within range %llu - %llu\n", |
|
curr_trk, first_trk, last_trk); |
|
return ERR_PTR(-EINVAL); |
|
} |
|
format->track = curr_trk; |
|
/* test if track is already in formatting by another thread */ |
|
if (test_and_set_format_track(format, block)) |
|
return ERR_PTR(-EEXIST); |
|
|
|
fdata.start_unit = curr_trk; |
|
fdata.stop_unit = curr_trk; |
|
fdata.blksize = blksize; |
|
fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; |
|
|
|
rc = dasd_eckd_format_sanity_checks(base, &fdata); |
|
if (rc) |
|
return ERR_PTR(-EINVAL); |
|
|
|
/* |
|
* We're building the request with PAV disabled as we're reusing |
|
* the former startdev. |
|
*/ |
|
fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); |
|
if (IS_ERR(fcqr)) |
|
return fcqr; |
|
|
|
fcqr->callback = dasd_eckd_ese_format_cb; |
|
fcqr->callback_data = (void *) format; |
|
|
|
return fcqr; |
|
} |
|
|
|
/* |
|
* When data is read from an unformatted area of an ESE volume, this function |
|
* returns zeroed data and thereby mimics a read of zero data. |
|
* |
|
* The first unformatted track is the one that got the NRF error, the address is |
|
* encoded in the sense data. |
|
* |
|
* All tracks before have returned valid data and should not be touched. |
|
* All tracks after the unformatted track might be formatted or not. This is |
|
* currently not known, remember the processed data and return the remainder of |
|
* the request to the blocklayer in __dasd_cleanup_cqr(). |
|
*/ |
|
static int dasd_eckd_ese_read(struct dasd_ccw_req *cqr, struct irb *irb) |
|
{ |
|
struct dasd_eckd_private *private; |
|
sector_t first_trk, last_trk; |
|
sector_t first_blk, last_blk; |
|
unsigned int blksize, off; |
|
unsigned int recs_per_trk; |
|
struct dasd_device *base; |
|
struct req_iterator iter; |
|
struct dasd_block *block; |
|
unsigned int skip_block; |
|
unsigned int blk_count; |
|
struct request *req; |
|
struct bio_vec bv; |
|
sector_t curr_trk; |
|
sector_t end_blk; |
|
char *dst; |
|
int rc; |
|
|
|
req = (struct request *) cqr->callback_data; |
|
base = cqr->block->base; |
|
blksize = base->block->bp_block; |
|
block = cqr->block; |
|
private = base->private; |
|
skip_block = 0; |
|
blk_count = 0; |
|
|
|
recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
|
first_trk = first_blk = blk_rq_pos(req) >> block->s2b_shift; |
|
sector_div(first_trk, recs_per_trk); |
|
last_trk = last_blk = |
|
(blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; |
|
sector_div(last_trk, recs_per_trk); |
|
rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); |
|
if (rc) |
|
return rc; |
|
|
|
/* sanity check if the current track from sense data is valid */ |
|
if (curr_trk < first_trk || curr_trk > last_trk) { |
|
DBF_DEV_EVENT(DBF_WARNING, base, |
|
"ESE error track %llu not within range %llu - %llu\n", |
|
curr_trk, first_trk, last_trk); |
|
return -EINVAL; |
|
} |
|
|
|
/* |
|
* if not the first track got the NRF error we have to skip over valid |
|
* blocks |
|
*/ |
|
if (curr_trk != first_trk) |
|
skip_block = curr_trk * recs_per_trk - first_blk; |
|
|
|
/* we have no information beyond the current track */ |
|
end_blk = (curr_trk + 1) * recs_per_trk; |
|
|
|
rq_for_each_segment(bv, req, iter) { |
|
dst = bvec_virt(&bv); |
|
for (off = 0; off < bv.bv_len; off += blksize) { |
|
if (first_blk + blk_count >= end_blk) { |
|
cqr->proc_bytes = blk_count * blksize; |
|
return 0; |
|
} |
|
if (dst && !skip_block) { |
|
dst += off; |
|
memset(dst, 0, blksize); |
|
} else { |
|
skip_block--; |
|
} |
|
blk_count++; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
/* |
|
* Helper function to count consecutive records of a single track. |
|
*/ |
|
static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, |
|
int max) |
|
{ |
|
int head; |
|
int i; |
|
|
|
head = fmt_buffer[start].head; |
|
|
|
/* |
|
* There are 3 conditions where we stop counting: |
|
* - if data reoccurs (same head and record may reoccur), which may |
|
* happen due to the way DASD_ECKD_CCW_READ_COUNT works |
|
* - when the head changes, because we're iterating over several tracks |
|
* then (DASD_ECKD_CCW_READ_COUNT_MT) |
|
* - when we've reached the end of sensible data in the buffer (the |
|
* record will be 0 then) |
|
*/ |
|
for (i = start; i < max; i++) { |
|
if (i > start) { |
|
if ((fmt_buffer[i].head == head && |
|
fmt_buffer[i].record == 1) || |
|
fmt_buffer[i].head != head || |
|
fmt_buffer[i].record == 0) |
|
break; |
|
} |
|
} |
|
|
|
return i - start; |
|
} |
|
|
|
/* |
|
* Evaluate a given range of tracks. Data like number of records, blocksize, |
|
* record ids, and key length are compared with expected data. |
|
* |
|
* If a mismatch occurs, the corresponding error bit is set, as well as |
|
* additional information, depending on the error. |
|
*/ |
|
static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, |
|
struct format_check_t *cdata, |
|
int rpt_max, int rpt_exp, |
|
int trk_per_cyl, int tpm) |
|
{ |
|
struct ch_t geo; |
|
int max_entries; |
|
int count = 0; |
|
int trkcount; |
|
int blksize; |
|
int pos = 0; |
|
int i, j; |
|
int kl; |
|
|
|
trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; |
|
max_entries = trkcount * rpt_max; |
|
|
|
for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { |
|
/* Calculate the correct next starting position in the buffer */ |
|
if (tpm) { |
|
while (fmt_buffer[pos].record == 0 && |
|
fmt_buffer[pos].dl == 0) { |
|
if (pos++ > max_entries) |
|
break; |
|
} |
|
} else { |
|
if (i != cdata->expect.start_unit) |
|
pos += rpt_max - count; |
|
} |
|
|
|
/* Calculate the expected geo values for the current track */ |
|
set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); |
|
|
|
/* Count and check number of records */ |
|
count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); |
|
|
|
if (count < rpt_exp) { |
|
cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; |
|
break; |
|
} |
|
if (count > rpt_exp) { |
|
cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; |
|
break; |
|
} |
|
|
|
for (j = 0; j < count; j++, pos++) { |
|
blksize = cdata->expect.blksize; |
|
kl = 0; |
|
|
|
/* |
|
* Set special values when checking CDL formatted |
|
* devices. |
|
*/ |
|
if ((cdata->expect.intensity & 0x08) && |
|
geo.cyl == 0 && geo.head == 0) { |
|
if (j < 3) { |
|
blksize = sizes_trk0[j] - 4; |
|
kl = 4; |
|
} |
|
} |
|
if ((cdata->expect.intensity & 0x08) && |
|
geo.cyl == 0 && geo.head == 1) { |
|
blksize = LABEL_SIZE - 44; |
|
kl = 44; |
|
} |
|
|
|
/* Check blocksize */ |
|
if (fmt_buffer[pos].dl != blksize) { |
|
cdata->result = DASD_FMT_ERR_BLKSIZE; |
|
goto out; |
|
} |
|
/* Check if key length is 0 */ |
|
if (fmt_buffer[pos].kl != kl) { |
|
cdata->result = DASD_FMT_ERR_KEY_LENGTH; |
|
goto out; |
|
} |
|
/* Check if record_id is correct */ |
|
if (fmt_buffer[pos].cyl != geo.cyl || |
|
fmt_buffer[pos].head != geo.head || |
|
fmt_buffer[pos].record != (j + 1)) { |
|
cdata->result = DASD_FMT_ERR_RECORD_ID; |
|
goto out; |
|
} |
|
} |
|
} |
|
|
|
out: |
|
/* |
|
* In case of no errors, we need to decrease by one |
|
* to get the correct positions. |
|
*/ |
|
if (!cdata->result) { |
|
i--; |
|
pos--; |
|
} |
|
|
|
cdata->unit = i; |
|
cdata->num_records = count; |
|
cdata->rec = fmt_buffer[pos].record; |
|
cdata->blksize = fmt_buffer[pos].dl; |
|
cdata->key_length = fmt_buffer[pos].kl; |
|
} |
|
|
|
/* |
|
* Check the format of a range of tracks of a DASD. |
|
*/ |
|
static int dasd_eckd_check_device_format(struct dasd_device *base, |
|
struct format_check_t *cdata, |
|
int enable_pav) |
|
{ |
|
struct dasd_eckd_private *private = base->private; |
|
struct eckd_count *fmt_buffer; |
|
struct irb irb; |
|
int rpt_max, rpt_exp; |
|
int fmt_buffer_size; |
|
int trk_per_cyl; |
|
int trkcount; |
|
int tpm = 0; |
|
int rc; |
|
|
|
trk_per_cyl = private->rdc_data.trk_per_cyl; |
|
|
|
/* Get maximum and expected amount of records per track */ |
|
rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; |
|
rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); |
|
|
|
trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; |
|
fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); |
|
|
|
fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); |
|
if (!fmt_buffer) |
|
return -ENOMEM; |
|
|
|
/* |
|
* A certain FICON feature subset is needed to operate in transport |
|
* mode. Additionally, the support for transport mode is implicitly |
|
* checked by comparing the buffer size with fcx_max_data. As long as |
|
* the buffer size is smaller we can operate in transport mode and |
|
* process multiple tracks. If not, only one track at once is being |
|
* processed using command mode. |
|
*/ |
|
if ((private->features.feature[40] & 0x04) && |
|
fmt_buffer_size <= private->fcx_max_data) |
|
tpm = 1; |
|
|
|
rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, |
|
tpm, fmt_buffer, rpt_max, &irb); |
|
if (rc && rc != -EIO) |
|
goto out; |
|
if (rc == -EIO) { |
|
/* |
|
* If our first attempt with transport mode enabled comes back |
|
* with an incorrect length error, we're going to retry the |
|
* check with command mode. |
|
*/ |
|
if (tpm && scsw_cstat(&irb.scsw) == 0x40) { |
|
tpm = 0; |
|
rc = dasd_eckd_format_process_data(base, &cdata->expect, |
|
enable_pav, tpm, |
|
fmt_buffer, rpt_max, |
|
&irb); |
|
if (rc) |
|
goto out; |
|
} else { |
|
goto out; |
|
} |
|
} |
|
|
|
dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, |
|
trk_per_cyl, tpm); |
|
|
|
out: |
|
kfree(fmt_buffer); |
|
|
|
return rc; |
|
} |
|
|
|
static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) |
|
{ |
|
if (cqr->retries < 0) { |
|
cqr->status = DASD_CQR_FAILED; |
|
return; |
|
} |
|
cqr->status = DASD_CQR_FILLED; |
|
if (cqr->block && (cqr->startdev != cqr->block->base)) { |
|
dasd_eckd_reset_ccw_to_base_io(cqr); |
|
cqr->startdev = cqr->block->base; |
|
cqr->lpm = dasd_path_get_opm(cqr->block->base); |
|
} |
|
}; |
|
|
|
static dasd_erp_fn_t |
|
dasd_eckd_erp_action(struct dasd_ccw_req * cqr) |
|
{ |
|
struct dasd_device *device = (struct dasd_device *) cqr->startdev; |
|
struct ccw_device *cdev = device->cdev; |
|
|
|
switch (cdev->id.cu_type) { |
|
case 0x3990: |
|
case 0x2105: |
|
case 0x2107: |
|
case 0x1750: |
|
return dasd_3990_erp_action; |
|
case 0x9343: |
|
case 0x3880: |
|
default: |
|
return dasd_default_erp_action; |
|
} |
|
} |
|
|
|
static dasd_erp_fn_t |
|
dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) |
|
{ |
|
return dasd_default_erp_postaction; |
|
} |
|
|
|
static void dasd_eckd_check_for_device_change(struct dasd_device *device, |
|
struct dasd_ccw_req *cqr, |
|
struct irb *irb) |
|
{ |
|
char mask; |
|
char *sense = NULL; |
|
struct dasd_eckd_private *private = device->private; |
|
|
|
/* first of all check for state change pending interrupt */ |
|
mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; |
|
if ((scsw_dstat(&irb->scsw) & mask) == mask) { |
|
/* |
|
* for alias only, not in offline processing |
|
* and only if not suspended |
|
*/ |
|
if (!device->block && private->lcu && |
|
device->state == DASD_STATE_ONLINE && |
|
!test_bit(DASD_FLAG_OFFLINE, &device->flags) && |
|
!test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { |
|
/* schedule worker to reload device */ |
|
dasd_reload_device(device); |
|
} |
|
dasd_generic_handle_state_change(device); |
|
return; |
|
} |
|
|
|
sense = dasd_get_sense(irb); |
|
if (!sense) |
|
return; |
|
|
|
/* summary unit check */ |
|
if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && |
|
(scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { |
|
if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { |
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
|
"eckd suc: device already notified"); |
|
return; |
|
} |
|
sense = dasd_get_sense(irb); |
|
if (!sense) { |
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
|
"eckd suc: no reason code available"); |
|
clear_bit(DASD_FLAG_SUC, &device->flags); |
|
return; |
|
|
|
} |
|
private->suc_reason = sense[8]; |
|
DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", |
|
"eckd handle summary unit check: reason", |
|
private->suc_reason); |
|
dasd_get_device(device); |
|
if (!schedule_work(&device->suc_work)) |
|
dasd_put_device(device); |
|
|
|
return; |
|
} |
|
|
|
/* service information message SIM */ |
|
if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && |
|
((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { |
|
dasd_3990_erp_handle_sim(device, sense); |
|
return; |
|
} |
|
|
|
/* loss of device reservation is handled via base devices only |
|
* as alias devices may be used with several bases |
|
*/ |
|
if (device->block && (sense[27] & DASD_SENSE_BIT_0) && |
|
(sense[7] == 0x3F) && |
|
(scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && |
|
test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { |
|
if (device->features & DASD_FEATURE_FAILONSLCK) |
|
set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); |
|
clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); |
|
dev_err(&device->cdev->dev, |
|
"The device reservation was lost\n"); |
|
} |
|
} |
|
|
|
static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, |
|
unsigned int first_trk, |
|
unsigned int last_trk) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
unsigned int trks_per_vol; |
|
int rc = 0; |
|
|
|
trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; |
|
|
|
if (first_trk >= trks_per_vol) { |
|
dev_warn(&device->cdev->dev, |
|
"Start track number %u used in the space release command is too big\n", |
|
first_trk); |
|
rc = -EINVAL; |
|
} else if (last_trk >= trks_per_vol) { |
|
dev_warn(&device->cdev->dev, |
|
"Stop track number %u used in the space release command is too big\n", |
|
last_trk); |
|
rc = -EINVAL; |
|
} else if (first_trk > last_trk) { |
|
dev_warn(&device->cdev->dev, |
|
"Start track %u used in the space release command exceeds the end track\n", |
|
first_trk); |
|
rc = -EINVAL; |
|
} |
|
return rc; |
|
} |
|
|
|
/* |
|
* Helper function to count the amount of involved extents within a given range |
|
* with extent alignment in mind. |
|
*/ |
|
static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) |
|
{ |
|
int cur_pos = 0; |
|
int count = 0; |
|
int tmp; |
|
|
|
if (from == to) |
|
return 1; |
|
|
|
/* Count first partial extent */ |
|
if (from % trks_per_ext != 0) { |
|
tmp = from + trks_per_ext - (from % trks_per_ext) - 1; |
|
if (tmp > to) |
|
tmp = to; |
|
cur_pos = tmp - from + 1; |
|
count++; |
|
} |
|
/* Count full extents */ |
|
if (to - (from + cur_pos) + 1 >= trks_per_ext) { |
|
tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); |
|
count += (tmp - (from + cur_pos) + 1) / trks_per_ext; |
|
cur_pos = tmp; |
|
} |
|
/* Count last partial extent */ |
|
if (cur_pos < to) |
|
count++; |
|
|
|
return count; |
|
} |
|
|
|
/* |
|
* Release allocated space for a given range or an entire volume. |
|
*/ |
|
static struct dasd_ccw_req * |
|
dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, |
|
struct request *req, unsigned int first_trk, |
|
unsigned int last_trk, int by_extent) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
struct dasd_dso_ras_ext_range *ras_range; |
|
struct dasd_rssd_features *features; |
|
struct dasd_dso_ras_data *ras_data; |
|
u16 heads, beg_head, end_head; |
|
int cur_to_trk, cur_from_trk; |
|
struct dasd_ccw_req *cqr; |
|
u32 beg_cyl, end_cyl; |
|
struct ccw1 *ccw; |
|
int trks_per_ext; |
|
size_t ras_size; |
|
size_t size; |
|
int nr_exts; |
|
void *rq; |
|
int i; |
|
|
|
if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) |
|
return ERR_PTR(-EINVAL); |
|
|
|
rq = req ? blk_mq_rq_to_pdu(req) : NULL; |
|
|
|
features = &private->features; |
|
|
|
trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; |
|
nr_exts = 0; |
|
if (by_extent) |
|
nr_exts = count_exts(first_trk, last_trk, trks_per_ext); |
|
ras_size = sizeof(*ras_data); |
|
size = ras_size + (nr_exts * sizeof(*ras_range)); |
|
|
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); |
|
if (IS_ERR(cqr)) { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
|
"Could not allocate RAS request"); |
|
return cqr; |
|
} |
|
|
|
ras_data = cqr->data; |
|
memset(ras_data, 0, size); |
|
|
|
ras_data->order = DSO_ORDER_RAS; |
|
ras_data->flags.vol_type = 0; /* CKD volume */ |
|
/* Release specified extents or entire volume */ |
|
ras_data->op_flags.by_extent = by_extent; |
|
/* |
|
* This bit guarantees initialisation of tracks within an extent that is |
|
* not fully specified, but is only supported with a certain feature |
|
* subset. |
|
*/ |
|
ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01); |
|
ras_data->lss = private->ned->ID; |
|
ras_data->dev_addr = private->ned->unit_addr; |
|
ras_data->nr_exts = nr_exts; |
|
|
|
if (by_extent) { |
|
heads = private->rdc_data.trk_per_cyl; |
|
cur_from_trk = first_trk; |
|
cur_to_trk = first_trk + trks_per_ext - |
|
(first_trk % trks_per_ext) - 1; |
|
if (cur_to_trk > last_trk) |
|
cur_to_trk = last_trk; |
|
ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); |
|
|
|
for (i = 0; i < nr_exts; i++) { |
|
beg_cyl = cur_from_trk / heads; |
|
beg_head = cur_from_trk % heads; |
|
end_cyl = cur_to_trk / heads; |
|
end_head = cur_to_trk % heads; |
|
|
|
set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); |
|
set_ch_t(&ras_range->end_ext, end_cyl, end_head); |
|
|
|
cur_from_trk = cur_to_trk + 1; |
|
cur_to_trk = cur_from_trk + trks_per_ext - 1; |
|
if (cur_to_trk > last_trk) |
|
cur_to_trk = last_trk; |
|
ras_range++; |
|
} |
|
} |
|
|
|
ccw = cqr->cpaddr; |
|
ccw->cda = (__u32)(addr_t)cqr->data; |
|
ccw->cmd_code = DASD_ECKD_CCW_DSO; |
|
ccw->count = size; |
|
|
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
cqr->block = block; |
|
cqr->retries = 256; |
|
cqr->expires = device->default_expires * HZ; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
|
|
return cqr; |
|
} |
|
|
|
static int dasd_eckd_release_space_full(struct dasd_device *device) |
|
{ |
|
struct dasd_ccw_req *cqr; |
|
int rc; |
|
|
|
cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); |
|
if (IS_ERR(cqr)) |
|
return PTR_ERR(cqr); |
|
|
|
rc = dasd_sleep_on_interruptible(cqr); |
|
|
|
dasd_sfree_request(cqr, cqr->memdev); |
|
|
|
return rc; |
|
} |
|
|
|
static int dasd_eckd_release_space_trks(struct dasd_device *device, |
|
unsigned int from, unsigned int to) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
struct dasd_block *block = device->block; |
|
struct dasd_ccw_req *cqr, *n; |
|
struct list_head ras_queue; |
|
unsigned int device_exts; |
|
int trks_per_ext; |
|
int stop, step; |
|
int cur_pos; |
|
int rc = 0; |
|
int retry; |
|
|
|
INIT_LIST_HEAD(&ras_queue); |
|
|
|
device_exts = private->real_cyl / dasd_eckd_ext_size(device); |
|
trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; |
|
|
|
/* Make sure device limits are not exceeded */ |
|
step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); |
|
cur_pos = from; |
|
|
|
do { |
|
retry = 0; |
|
while (cur_pos < to) { |
|
stop = cur_pos + step - |
|
((cur_pos + step) % trks_per_ext) - 1; |
|
if (stop > to) |
|
stop = to; |
|
|
|
cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); |
|
if (IS_ERR(cqr)) { |
|
rc = PTR_ERR(cqr); |
|
if (rc == -ENOMEM) { |
|
if (list_empty(&ras_queue)) |
|
goto out; |
|
retry = 1; |
|
break; |
|
} |
|
goto err_out; |
|
} |
|
|
|
spin_lock_irq(&block->queue_lock); |
|
list_add_tail(&cqr->blocklist, &ras_queue); |
|
spin_unlock_irq(&block->queue_lock); |
|
cur_pos = stop + 1; |
|
} |
|
|
|
rc = dasd_sleep_on_queue_interruptible(&ras_queue); |
|
|
|
err_out: |
|
list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { |
|
device = cqr->startdev; |
|
private = device->private; |
|
|
|
spin_lock_irq(&block->queue_lock); |
|
list_del_init(&cqr->blocklist); |
|
spin_unlock_irq(&block->queue_lock); |
|
dasd_sfree_request(cqr, device); |
|
private->count--; |
|
} |
|
} while (retry); |
|
|
|
out: |
|
return rc; |
|
} |
|
|
|
static int dasd_eckd_release_space(struct dasd_device *device, |
|
struct format_data_t *rdata) |
|
{ |
|
if (rdata->intensity & DASD_FMT_INT_ESE_FULL) |
|
return dasd_eckd_release_space_full(device); |
|
else if (rdata->intensity == 0) |
|
return dasd_eckd_release_space_trks(device, rdata->start_unit, |
|
rdata->stop_unit); |
|
else |
|
return -EINVAL; |
|
} |
|
|
|
static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( |
|
struct dasd_device *startdev, |
|
struct dasd_block *block, |
|
struct request *req, |
|
sector_t first_rec, |
|
sector_t last_rec, |
|
sector_t first_trk, |
|
sector_t last_trk, |
|
unsigned int first_offs, |
|
unsigned int last_offs, |
|
unsigned int blk_per_trk, |
|
unsigned int blksize) |
|
{ |
|
struct dasd_eckd_private *private; |
|
unsigned long *idaws; |
|
struct LO_eckd_data *LO_data; |
|
struct dasd_ccw_req *cqr; |
|
struct ccw1 *ccw; |
|
struct req_iterator iter; |
|
struct bio_vec bv; |
|
char *dst; |
|
unsigned int off; |
|
int count, cidaw, cplength, datasize; |
|
sector_t recid; |
|
unsigned char cmd, rcmd; |
|
int use_prefix; |
|
struct dasd_device *basedev; |
|
|
|
basedev = block->base; |
|
private = basedev->private; |
|
if (rq_data_dir(req) == READ) |
|
cmd = DASD_ECKD_CCW_READ_MT; |
|
else if (rq_data_dir(req) == WRITE) |
|
cmd = DASD_ECKD_CCW_WRITE_MT; |
|
else |
|
return ERR_PTR(-EINVAL); |
|
|
|
/* Check struct bio and count the number of blocks for the request. */ |
|
count = 0; |
|
cidaw = 0; |
|
rq_for_each_segment(bv, req, iter) { |
|
if (bv.bv_len & (blksize - 1)) |
|
/* Eckd can only do full blocks. */ |
|
return ERR_PTR(-EINVAL); |
|
count += bv.bv_len >> (block->s2b_shift + 9); |
|
if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) |
|
cidaw += bv.bv_len >> (block->s2b_shift + 9); |
|
} |
|
/* Paranoia. */ |
|
if (count != last_rec - first_rec + 1) |
|
return ERR_PTR(-EINVAL); |
|
|
|
/* use the prefix command if available */ |
|
use_prefix = private->features.feature[8] & 0x01; |
|
if (use_prefix) { |
|
/* 1x prefix + number of blocks */ |
|
cplength = 2 + count; |
|
/* 1x prefix + cidaws*sizeof(long) */ |
|
datasize = sizeof(struct PFX_eckd_data) + |
|
sizeof(struct LO_eckd_data) + |
|
cidaw * sizeof(unsigned long); |
|
} else { |
|
/* 1x define extent + 1x locate record + number of blocks */ |
|
cplength = 2 + count; |
|
/* 1x define extent + 1x locate record + cidaws*sizeof(long) */ |
|
datasize = sizeof(struct DE_eckd_data) + |
|
sizeof(struct LO_eckd_data) + |
|
cidaw * sizeof(unsigned long); |
|
} |
|
/* Find out the number of additional locate record ccws for cdl. */ |
|
if (private->uses_cdl && first_rec < 2*blk_per_trk) { |
|
if (last_rec >= 2*blk_per_trk) |
|
count = 2*blk_per_trk - first_rec; |
|
cplength += count; |
|
datasize += count*sizeof(struct LO_eckd_data); |
|
} |
|
/* Allocate the ccw request. */ |
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
|
startdev, blk_mq_rq_to_pdu(req)); |
|
if (IS_ERR(cqr)) |
|
return cqr; |
|
ccw = cqr->cpaddr; |
|
/* First ccw is define extent or prefix. */ |
|
if (use_prefix) { |
|
if (prefix(ccw++, cqr->data, first_trk, |
|
last_trk, cmd, basedev, startdev) == -EAGAIN) { |
|
/* Clock not in sync and XRC is enabled. |
|
* Try again later. |
|
*/ |
|
dasd_sfree_request(cqr, startdev); |
|
return ERR_PTR(-EAGAIN); |
|
} |
|
idaws = (unsigned long *) (cqr->data + |
|
sizeof(struct PFX_eckd_data)); |
|
} else { |
|
if (define_extent(ccw++, cqr->data, first_trk, |
|
last_trk, cmd, basedev, 0) == -EAGAIN) { |
|
/* Clock not in sync and XRC is enabled. |
|
* Try again later. |
|
*/ |
|
dasd_sfree_request(cqr, startdev); |
|
return ERR_PTR(-EAGAIN); |
|
} |
|
idaws = (unsigned long *) (cqr->data + |
|
sizeof(struct DE_eckd_data)); |
|
} |
|
/* Build locate_record+read/write/ccws. */ |
|
LO_data = (struct LO_eckd_data *) (idaws + cidaw); |
|
recid = first_rec; |
|
if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { |
|
/* Only standard blocks so there is just one locate record. */ |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
locate_record(ccw++, LO_data++, first_trk, first_offs + 1, |
|
last_rec - recid + 1, cmd, basedev, blksize); |
|
} |
|
rq_for_each_segment(bv, req, iter) { |
|
dst = bvec_virt(&bv); |
|
if (dasd_page_cache) { |
|
char *copy = kmem_cache_alloc(dasd_page_cache, |
|
GFP_DMA | __GFP_NOWARN); |
|
if (copy && rq_data_dir(req) == WRITE) |
|
memcpy(copy + bv.bv_offset, dst, bv.bv_len); |
|
if (copy) |
|
dst = copy + bv.bv_offset; |
|
} |
|
for (off = 0; off < bv.bv_len; off += blksize) { |
|
sector_t trkid = recid; |
|
unsigned int recoffs = sector_div(trkid, blk_per_trk); |
|
rcmd = cmd; |
|
count = blksize; |
|
/* Locate record for cdl special block ? */ |
|
if (private->uses_cdl && recid < 2*blk_per_trk) { |
|
if (dasd_eckd_cdl_special(blk_per_trk, recid)){ |
|
rcmd |= 0x8; |
|
count = dasd_eckd_cdl_reclen(recid); |
|
if (count < blksize && |
|
rq_data_dir(req) == READ) |
|
memset(dst + count, 0xe5, |
|
blksize - count); |
|
} |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
locate_record(ccw++, LO_data++, |
|
trkid, recoffs + 1, |
|
1, rcmd, basedev, count); |
|
} |
|
/* Locate record for standard blocks ? */ |
|
if (private->uses_cdl && recid == 2*blk_per_trk) { |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
locate_record(ccw++, LO_data++, |
|
trkid, recoffs + 1, |
|
last_rec - recid + 1, |
|
cmd, basedev, count); |
|
} |
|
/* Read/write ccw. */ |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
ccw->cmd_code = rcmd; |
|
ccw->count = count; |
|
if (idal_is_needed(dst, blksize)) { |
|
ccw->cda = (__u32)(addr_t) idaws; |
|
ccw->flags = CCW_FLAG_IDA; |
|
idaws = idal_create_words(idaws, dst, blksize); |
|
} else { |
|
ccw->cda = (__u32)(addr_t) dst; |
|
ccw->flags = 0; |
|
} |
|
ccw++; |
|
dst += blksize; |
|
recid++; |
|
} |
|
} |
|
if (blk_noretry_request(req) || |
|
block->base->features & DASD_FEATURE_FAILFAST) |
|
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
|
cqr->startdev = startdev; |
|
cqr->memdev = startdev; |
|
cqr->block = block; |
|
cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
|
cqr->lpm = dasd_path_get_ppm(startdev); |
|
cqr->retries = startdev->default_retries; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
|
|
/* Set flags to suppress output for expected errors */ |
|
if (dasd_eckd_is_ese(basedev)) { |
|
set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); |
|
set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); |
|
set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); |
|
} |
|
|
|
return cqr; |
|
} |
|
|
|
static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( |
|
struct dasd_device *startdev, |
|
struct dasd_block *block, |
|
struct request *req, |
|
sector_t first_rec, |
|
sector_t last_rec, |
|
sector_t first_trk, |
|
sector_t last_trk, |
|
unsigned int first_offs, |
|
unsigned int last_offs, |
|
unsigned int blk_per_trk, |
|
unsigned int blksize) |
|
{ |
|
unsigned long *idaws; |
|
struct dasd_ccw_req *cqr; |
|
struct ccw1 *ccw; |
|
struct req_iterator iter; |
|
struct bio_vec bv; |
|
char *dst, *idaw_dst; |
|
unsigned int cidaw, cplength, datasize; |
|
unsigned int tlf; |
|
sector_t recid; |
|
unsigned char cmd; |
|
struct dasd_device *basedev; |
|
unsigned int trkcount, count, count_to_trk_end; |
|
unsigned int idaw_len, seg_len, part_len, len_to_track_end; |
|
unsigned char new_track, end_idaw; |
|
sector_t trkid; |
|
unsigned int recoffs; |
|
|
|
basedev = block->base; |
|
if (rq_data_dir(req) == READ) |
|
cmd = DASD_ECKD_CCW_READ_TRACK_DATA; |
|
else if (rq_data_dir(req) == WRITE) |
|
cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; |
|
else |
|
return ERR_PTR(-EINVAL); |
|
|
|
/* Track based I/O needs IDAWs for each page, and not just for |
|
* 64 bit addresses. We need additional idals for pages |
|
* that get filled from two tracks, so we use the number |
|
* of records as upper limit. |
|
*/ |
|
cidaw = last_rec - first_rec + 1; |
|
trkcount = last_trk - first_trk + 1; |
|
|
|
/* 1x prefix + one read/write ccw per track */ |
|
cplength = 1 + trkcount; |
|
|
|
datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); |
|
|
|
/* Allocate the ccw request. */ |
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
|
startdev, blk_mq_rq_to_pdu(req)); |
|
if (IS_ERR(cqr)) |
|
return cqr; |
|
ccw = cqr->cpaddr; |
|
/* transfer length factor: how many bytes to read from the last track */ |
|
if (first_trk == last_trk) |
|
tlf = last_offs - first_offs + 1; |
|
else |
|
tlf = last_offs + 1; |
|
tlf *= blksize; |
|
|
|
if (prefix_LRE(ccw++, cqr->data, first_trk, |
|
last_trk, cmd, basedev, startdev, |
|
1 /* format */, first_offs + 1, |
|
trkcount, blksize, |
|
tlf) == -EAGAIN) { |
|
/* Clock not in sync and XRC is enabled. |
|
* Try again later. |
|
*/ |
|
dasd_sfree_request(cqr, startdev); |
|
return ERR_PTR(-EAGAIN); |
|
} |
|
|
|
/* |
|
* The translation of request into ccw programs must meet the |
|
* following conditions: |
|
* - all idaws but the first and the last must address full pages |
|
* (or 2K blocks on 31-bit) |
|
* - the scope of a ccw and it's idal ends with the track boundaries |
|
*/ |
|
idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); |
|
recid = first_rec; |
|
new_track = 1; |
|
end_idaw = 0; |
|
len_to_track_end = 0; |
|
idaw_dst = NULL; |
|
idaw_len = 0; |
|
rq_for_each_segment(bv, req, iter) { |
|
dst = bvec_virt(&bv); |
|
seg_len = bv.bv_len; |
|
while (seg_len) { |
|
if (new_track) { |
|
trkid = recid; |
|
recoffs = sector_div(trkid, blk_per_trk); |
|
count_to_trk_end = blk_per_trk - recoffs; |
|
count = min((last_rec - recid + 1), |
|
(sector_t)count_to_trk_end); |
|
len_to_track_end = count * blksize; |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
ccw->cmd_code = cmd; |
|
ccw->count = len_to_track_end; |
|
ccw->cda = (__u32)(addr_t)idaws; |
|
ccw->flags = CCW_FLAG_IDA; |
|
ccw++; |
|
recid += count; |
|
new_track = 0; |
|
/* first idaw for a ccw may start anywhere */ |
|
if (!idaw_dst) |
|
idaw_dst = dst; |
|
} |
|
/* If we start a new idaw, we must make sure that it |
|
* starts on an IDA_BLOCK_SIZE boundary. |
|
* If we continue an idaw, we must make sure that the |
|
* current segment begins where the so far accumulated |
|
* idaw ends |
|
*/ |
|
if (!idaw_dst) { |
|
if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { |
|
dasd_sfree_request(cqr, startdev); |
|
return ERR_PTR(-ERANGE); |
|
} else |
|
idaw_dst = dst; |
|
} |
|
if ((idaw_dst + idaw_len) != dst) { |
|
dasd_sfree_request(cqr, startdev); |
|
return ERR_PTR(-ERANGE); |
|
} |
|
part_len = min(seg_len, len_to_track_end); |
|
seg_len -= part_len; |
|
dst += part_len; |
|
idaw_len += part_len; |
|
len_to_track_end -= part_len; |
|
/* collected memory area ends on an IDA_BLOCK border, |
|
* -> create an idaw |
|
* idal_create_words will handle cases where idaw_len |
|
* is larger then IDA_BLOCK_SIZE |
|
*/ |
|
if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) |
|
end_idaw = 1; |
|
/* We also need to end the idaw at track end */ |
|
if (!len_to_track_end) { |
|
new_track = 1; |
|
end_idaw = 1; |
|
} |
|
if (end_idaw) { |
|
idaws = idal_create_words(idaws, idaw_dst, |
|
idaw_len); |
|
idaw_dst = NULL; |
|
idaw_len = 0; |
|
end_idaw = 0; |
|
} |
|
} |
|
} |
|
|
|
if (blk_noretry_request(req) || |
|
block->base->features & DASD_FEATURE_FAILFAST) |
|
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
|
cqr->startdev = startdev; |
|
cqr->memdev = startdev; |
|
cqr->block = block; |
|
cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
|
cqr->lpm = dasd_path_get_ppm(startdev); |
|
cqr->retries = startdev->default_retries; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
|
|
/* Set flags to suppress output for expected errors */ |
|
if (dasd_eckd_is_ese(basedev)) |
|
set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); |
|
|
|
return cqr; |
|
} |
|
|
|
static int prepare_itcw(struct itcw *itcw, |
|
unsigned int trk, unsigned int totrk, int cmd, |
|
struct dasd_device *basedev, |
|
struct dasd_device *startdev, |
|
unsigned int rec_on_trk, int count, |
|
unsigned int blksize, |
|
unsigned int total_data_size, |
|
unsigned int tlf, |
|
unsigned int blk_per_trk) |
|
{ |
|
struct PFX_eckd_data pfxdata; |
|
struct dasd_eckd_private *basepriv, *startpriv; |
|
struct DE_eckd_data *dedata; |
|
struct LRE_eckd_data *lredata; |
|
struct dcw *dcw; |
|
|
|
u32 begcyl, endcyl; |
|
u16 heads, beghead, endhead; |
|
u8 pfx_cmd; |
|
|
|
int rc = 0; |
|
int sector = 0; |
|
int dn, d; |
|
|
|
|
|
/* setup prefix data */ |
|
basepriv = basedev->private; |
|
startpriv = startdev->private; |
|
dedata = &pfxdata.define_extent; |
|
lredata = &pfxdata.locate_record; |
|
|
|
memset(&pfxdata, 0, sizeof(pfxdata)); |
|
pfxdata.format = 1; /* PFX with LRE */ |
|
pfxdata.base_address = basepriv->ned->unit_addr; |
|
pfxdata.base_lss = basepriv->ned->ID; |
|
pfxdata.validity.define_extent = 1; |
|
|
|
/* private uid is kept up to date, conf_data may be outdated */ |
|
if (startpriv->uid.type == UA_BASE_PAV_ALIAS) |
|
pfxdata.validity.verify_base = 1; |
|
|
|
if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { |
|
pfxdata.validity.verify_base = 1; |
|
pfxdata.validity.hyper_pav = 1; |
|
} |
|
|
|
switch (cmd) { |
|
case DASD_ECKD_CCW_READ_TRACK_DATA: |
|
dedata->mask.perm = 0x1; |
|
dedata->attributes.operation = basepriv->attrib.operation; |
|
dedata->blk_size = blksize; |
|
dedata->ga_extended |= 0x42; |
|
lredata->operation.orientation = 0x0; |
|
lredata->operation.operation = 0x0C; |
|
lredata->auxiliary.check_bytes = 0x01; |
|
pfx_cmd = DASD_ECKD_CCW_PFX_READ; |
|
break; |
|
case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
|
dedata->mask.perm = 0x02; |
|
dedata->attributes.operation = basepriv->attrib.operation; |
|
dedata->blk_size = blksize; |
|
rc = set_timestamp(NULL, dedata, basedev); |
|
dedata->ga_extended |= 0x42; |
|
lredata->operation.orientation = 0x0; |
|
lredata->operation.operation = 0x3F; |
|
lredata->extended_operation = 0x23; |
|
lredata->auxiliary.check_bytes = 0x2; |
|
/* |
|
* If XRC is supported the System Time Stamp is set. The |
|
* validity of the time stamp must be reflected in the prefix |
|
* data as well. |
|
*/ |
|
if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) |
|
pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ |
|
pfx_cmd = DASD_ECKD_CCW_PFX; |
|
break; |
|
case DASD_ECKD_CCW_READ_COUNT_MT: |
|
dedata->mask.perm = 0x1; |
|
dedata->attributes.operation = DASD_BYPASS_CACHE; |
|
dedata->ga_extended |= 0x42; |
|
dedata->blk_size = blksize; |
|
lredata->operation.orientation = 0x2; |
|
lredata->operation.operation = 0x16; |
|
lredata->auxiliary.check_bytes = 0x01; |
|
pfx_cmd = DASD_ECKD_CCW_PFX_READ; |
|
break; |
|
default: |
|
DBF_DEV_EVENT(DBF_ERR, basedev, |
|
"prepare itcw, unknown opcode 0x%x", cmd); |
|
BUG(); |
|
break; |
|
} |
|
if (rc) |
|
return rc; |
|
|
|
dedata->attributes.mode = 0x3; /* ECKD */ |
|
|
|
heads = basepriv->rdc_data.trk_per_cyl; |
|
begcyl = trk / heads; |
|
beghead = trk % heads; |
|
endcyl = totrk / heads; |
|
endhead = totrk % heads; |
|
|
|
/* check for sequential prestage - enhance cylinder range */ |
|
if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || |
|
dedata->attributes.operation == DASD_SEQ_ACCESS) { |
|
|
|
if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) |
|
endcyl += basepriv->attrib.nr_cyl; |
|
else |
|
endcyl = (basepriv->real_cyl - 1); |
|
} |
|
|
|
set_ch_t(&dedata->beg_ext, begcyl, beghead); |
|
set_ch_t(&dedata->end_ext, endcyl, endhead); |
|
|
|
dedata->ep_format = 0x20; /* records per track is valid */ |
|
dedata->ep_rec_per_track = blk_per_trk; |
|
|
|
if (rec_on_trk) { |
|
switch (basepriv->rdc_data.dev_type) { |
|
case 0x3390: |
|
dn = ceil_quot(blksize + 6, 232); |
|
d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); |
|
sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; |
|
break; |
|
case 0x3380: |
|
d = 7 + ceil_quot(blksize + 12, 32); |
|
sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; |
|
break; |
|
} |
|
} |
|
|
|
if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { |
|
lredata->auxiliary.length_valid = 0; |
|
lredata->auxiliary.length_scope = 0; |
|
lredata->sector = 0xff; |
|
} else { |
|
lredata->auxiliary.length_valid = 1; |
|
lredata->auxiliary.length_scope = 1; |
|
lredata->sector = sector; |
|
} |
|
lredata->auxiliary.imbedded_ccw_valid = 1; |
|
lredata->length = tlf; |
|
lredata->imbedded_ccw = cmd; |
|
lredata->count = count; |
|
set_ch_t(&lredata->seek_addr, begcyl, beghead); |
|
lredata->search_arg.cyl = lredata->seek_addr.cyl; |
|
lredata->search_arg.head = lredata->seek_addr.head; |
|
lredata->search_arg.record = rec_on_trk; |
|
|
|
dcw = itcw_add_dcw(itcw, pfx_cmd, 0, |
|
&pfxdata, sizeof(pfxdata), total_data_size); |
|
return PTR_ERR_OR_ZERO(dcw); |
|
} |
|
|
|
static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( |
|
struct dasd_device *startdev, |
|
struct dasd_block *block, |
|
struct request *req, |
|
sector_t first_rec, |
|
sector_t last_rec, |
|
sector_t first_trk, |
|
sector_t last_trk, |
|
unsigned int first_offs, |
|
unsigned int last_offs, |
|
unsigned int blk_per_trk, |
|
unsigned int blksize) |
|
{ |
|
struct dasd_ccw_req *cqr; |
|
struct req_iterator iter; |
|
struct bio_vec bv; |
|
char *dst; |
|
unsigned int trkcount, ctidaw; |
|
unsigned char cmd; |
|
struct dasd_device *basedev; |
|
unsigned int tlf; |
|
struct itcw *itcw; |
|
struct tidaw *last_tidaw = NULL; |
|
int itcw_op; |
|
size_t itcw_size; |
|
u8 tidaw_flags; |
|
unsigned int seg_len, part_len, len_to_track_end; |
|
unsigned char new_track; |
|
sector_t recid, trkid; |
|
unsigned int offs; |
|
unsigned int count, count_to_trk_end; |
|
int ret; |
|
|
|
basedev = block->base; |
|
if (rq_data_dir(req) == READ) { |
|
cmd = DASD_ECKD_CCW_READ_TRACK_DATA; |
|
itcw_op = ITCW_OP_READ; |
|
} else if (rq_data_dir(req) == WRITE) { |
|
cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; |
|
itcw_op = ITCW_OP_WRITE; |
|
} else |
|
return ERR_PTR(-EINVAL); |
|
|
|
/* trackbased I/O needs address all memory via TIDAWs, |
|
* not just for 64 bit addresses. This allows us to map |
|
* each segment directly to one tidaw. |
|
* In the case of write requests, additional tidaws may |
|
* be needed when a segment crosses a track boundary. |
|
*/ |
|
trkcount = last_trk - first_trk + 1; |
|
ctidaw = 0; |
|
rq_for_each_segment(bv, req, iter) { |
|
++ctidaw; |
|
} |
|
if (rq_data_dir(req) == WRITE) |
|
ctidaw += (last_trk - first_trk); |
|
|
|
/* Allocate the ccw request. */ |
|
itcw_size = itcw_calc_size(0, ctidaw, 0); |
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, |
|
blk_mq_rq_to_pdu(req)); |
|
if (IS_ERR(cqr)) |
|
return cqr; |
|
|
|
/* transfer length factor: how many bytes to read from the last track */ |
|
if (first_trk == last_trk) |
|
tlf = last_offs - first_offs + 1; |
|
else |
|
tlf = last_offs + 1; |
|
tlf *= blksize; |
|
|
|
itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); |
|
if (IS_ERR(itcw)) { |
|
ret = -EINVAL; |
|
goto out_error; |
|
} |
|
cqr->cpaddr = itcw_get_tcw(itcw); |
|
if (prepare_itcw(itcw, first_trk, last_trk, |
|
cmd, basedev, startdev, |
|
first_offs + 1, |
|
trkcount, blksize, |
|
(last_rec - first_rec + 1) * blksize, |
|
tlf, blk_per_trk) == -EAGAIN) { |
|
/* Clock not in sync and XRC is enabled. |
|
* Try again later. |
|
*/ |
|
ret = -EAGAIN; |
|
goto out_error; |
|
} |
|
len_to_track_end = 0; |
|
/* |
|
* A tidaw can address 4k of memory, but must not cross page boundaries |
|
* We can let the block layer handle this by setting |
|
* blk_queue_segment_boundary to page boundaries and |
|
* blk_max_segment_size to page size when setting up the request queue. |
|
* For write requests, a TIDAW must not cross track boundaries, because |
|
* we have to set the CBC flag on the last tidaw for each track. |
|
*/ |
|
if (rq_data_dir(req) == WRITE) { |
|
new_track = 1; |
|
recid = first_rec; |
|
rq_for_each_segment(bv, req, iter) { |
|
dst = bvec_virt(&bv); |
|
seg_len = bv.bv_len; |
|
while (seg_len) { |
|
if (new_track) { |
|
trkid = recid; |
|
offs = sector_div(trkid, blk_per_trk); |
|
count_to_trk_end = blk_per_trk - offs; |
|
count = min((last_rec - recid + 1), |
|
(sector_t)count_to_trk_end); |
|
len_to_track_end = count * blksize; |
|
recid += count; |
|
new_track = 0; |
|
} |
|
part_len = min(seg_len, len_to_track_end); |
|
seg_len -= part_len; |
|
len_to_track_end -= part_len; |
|
/* We need to end the tidaw at track end */ |
|
if (!len_to_track_end) { |
|
new_track = 1; |
|
tidaw_flags = TIDAW_FLAGS_INSERT_CBC; |
|
} else |
|
tidaw_flags = 0; |
|
last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, |
|
dst, part_len); |
|
if (IS_ERR(last_tidaw)) { |
|
ret = -EINVAL; |
|
goto out_error; |
|
} |
|
dst += part_len; |
|
} |
|
} |
|
} else { |
|
rq_for_each_segment(bv, req, iter) { |
|
dst = bvec_virt(&bv); |
|
last_tidaw = itcw_add_tidaw(itcw, 0x00, |
|
dst, bv.bv_len); |
|
if (IS_ERR(last_tidaw)) { |
|
ret = -EINVAL; |
|
goto out_error; |
|
} |
|
} |
|
} |
|
last_tidaw->flags |= TIDAW_FLAGS_LAST; |
|
last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; |
|
itcw_finalize(itcw); |
|
|
|
if (blk_noretry_request(req) || |
|
block->base->features & DASD_FEATURE_FAILFAST) |
|
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
|
cqr->cpmode = 1; |
|
cqr->startdev = startdev; |
|
cqr->memdev = startdev; |
|
cqr->block = block; |
|
cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
|
cqr->lpm = dasd_path_get_ppm(startdev); |
|
cqr->retries = startdev->default_retries; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
|
|
/* Set flags to suppress output for expected errors */ |
|
if (dasd_eckd_is_ese(basedev)) { |
|
set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); |
|
set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); |
|
set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); |
|
} |
|
|
|
return cqr; |
|
out_error: |
|
dasd_sfree_request(cqr, startdev); |
|
return ERR_PTR(ret); |
|
} |
|
|
|
static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, |
|
struct dasd_block *block, |
|
struct request *req) |
|
{ |
|
int cmdrtd, cmdwtd; |
|
int use_prefix; |
|
int fcx_multitrack; |
|
struct dasd_eckd_private *private; |
|
struct dasd_device *basedev; |
|
sector_t first_rec, last_rec; |
|
sector_t first_trk, last_trk; |
|
unsigned int first_offs, last_offs; |
|
unsigned int blk_per_trk, blksize; |
|
int cdlspecial; |
|
unsigned int data_size; |
|
struct dasd_ccw_req *cqr; |
|
|
|
basedev = block->base; |
|
private = basedev->private; |
|
|
|
/* Calculate number of blocks/records per track. */ |
|
blksize = block->bp_block; |
|
blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
|
if (blk_per_trk == 0) |
|
return ERR_PTR(-EINVAL); |
|
/* Calculate record id of first and last block. */ |
|
first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; |
|
first_offs = sector_div(first_trk, blk_per_trk); |
|
last_rec = last_trk = |
|
(blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; |
|
last_offs = sector_div(last_trk, blk_per_trk); |
|
cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); |
|
|
|
fcx_multitrack = private->features.feature[40] & 0x20; |
|
data_size = blk_rq_bytes(req); |
|
if (data_size % blksize) |
|
return ERR_PTR(-EINVAL); |
|
/* tpm write request add CBC data on each track boundary */ |
|
if (rq_data_dir(req) == WRITE) |
|
data_size += (last_trk - first_trk) * 4; |
|
|
|
/* is read track data and write track data in command mode supported? */ |
|
cmdrtd = private->features.feature[9] & 0x20; |
|
cmdwtd = private->features.feature[12] & 0x40; |
|
use_prefix = private->features.feature[8] & 0x01; |
|
|
|
cqr = NULL; |
|
if (cdlspecial || dasd_page_cache) { |
|
/* do nothing, just fall through to the cmd mode single case */ |
|
} else if ((data_size <= private->fcx_max_data) |
|
&& (fcx_multitrack || (first_trk == last_trk))) { |
|
cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, |
|
first_rec, last_rec, |
|
first_trk, last_trk, |
|
first_offs, last_offs, |
|
blk_per_trk, blksize); |
|
if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
|
(PTR_ERR(cqr) != -ENOMEM)) |
|
cqr = NULL; |
|
} else if (use_prefix && |
|
(((rq_data_dir(req) == READ) && cmdrtd) || |
|
((rq_data_dir(req) == WRITE) && cmdwtd))) { |
|
cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, |
|
first_rec, last_rec, |
|
first_trk, last_trk, |
|
first_offs, last_offs, |
|
blk_per_trk, blksize); |
|
if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
|
(PTR_ERR(cqr) != -ENOMEM)) |
|
cqr = NULL; |
|
} |
|
if (!cqr) |
|
cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, |
|
first_rec, last_rec, |
|
first_trk, last_trk, |
|
first_offs, last_offs, |
|
blk_per_trk, blksize); |
|
return cqr; |
|
} |
|
|
|
static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, |
|
struct dasd_block *block, |
|
struct request *req) |
|
{ |
|
sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; |
|
unsigned int seg_len, len_to_track_end; |
|
unsigned int cidaw, cplength, datasize; |
|
sector_t first_trk, last_trk, sectors; |
|
struct dasd_eckd_private *base_priv; |
|
struct dasd_device *basedev; |
|
struct req_iterator iter; |
|
struct dasd_ccw_req *cqr; |
|
unsigned int first_offs; |
|
unsigned int trkcount; |
|
unsigned long *idaws; |
|
unsigned int size; |
|
unsigned char cmd; |
|
struct bio_vec bv; |
|
struct ccw1 *ccw; |
|
int use_prefix; |
|
void *data; |
|
char *dst; |
|
|
|
/* |
|
* raw track access needs to be mutiple of 64k and on 64k boundary |
|
* For read requests we can fix an incorrect alignment by padding |
|
* the request with dummy pages. |
|
*/ |
|
start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; |
|
end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % |
|
DASD_RAW_SECTORS_PER_TRACK; |
|
end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % |
|
DASD_RAW_SECTORS_PER_TRACK; |
|
basedev = block->base; |
|
if ((start_padding_sectors || end_padding_sectors) && |
|
(rq_data_dir(req) == WRITE)) { |
|
DBF_DEV_EVENT(DBF_ERR, basedev, |
|
"raw write not track aligned (%llu,%llu) req %p", |
|
start_padding_sectors, end_padding_sectors, req); |
|
return ERR_PTR(-EINVAL); |
|
} |
|
|
|
first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; |
|
last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / |
|
DASD_RAW_SECTORS_PER_TRACK; |
|
trkcount = last_trk - first_trk + 1; |
|
first_offs = 0; |
|
|
|
if (rq_data_dir(req) == READ) |
|
cmd = DASD_ECKD_CCW_READ_TRACK; |
|
else if (rq_data_dir(req) == WRITE) |
|
cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; |
|
else |
|
return ERR_PTR(-EINVAL); |
|
|
|
/* |
|
* Raw track based I/O needs IDAWs for each page, |
|
* and not just for 64 bit addresses. |
|
*/ |
|
cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; |
|
|
|
/* |
|
* struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes |
|
* of extended parameter. This is needed for write full track. |
|
*/ |
|
base_priv = basedev->private; |
|
use_prefix = base_priv->features.feature[8] & 0x01; |
|
if (use_prefix) { |
|
cplength = 1 + trkcount; |
|
size = sizeof(struct PFX_eckd_data) + 2; |
|
} else { |
|
cplength = 2 + trkcount; |
|
size = sizeof(struct DE_eckd_data) + |
|
sizeof(struct LRE_eckd_data) + 2; |
|
} |
|
size = ALIGN(size, 8); |
|
|
|
datasize = size + cidaw * sizeof(unsigned long); |
|
|
|
/* Allocate the ccw request. */ |
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, |
|
datasize, startdev, blk_mq_rq_to_pdu(req)); |
|
if (IS_ERR(cqr)) |
|
return cqr; |
|
|
|
ccw = cqr->cpaddr; |
|
data = cqr->data; |
|
|
|
if (use_prefix) { |
|
prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, |
|
startdev, 1, first_offs + 1, trkcount, 0, 0); |
|
} else { |
|
define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
|
|
data += sizeof(struct DE_eckd_data); |
|
locate_record_ext(ccw++, data, first_trk, first_offs + 1, |
|
trkcount, cmd, basedev, 0, 0); |
|
} |
|
|
|
idaws = (unsigned long *)(cqr->data + size); |
|
len_to_track_end = 0; |
|
if (start_padding_sectors) { |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
ccw->cmd_code = cmd; |
|
/* maximum 3390 track size */ |
|
ccw->count = 57326; |
|
/* 64k map to one track */ |
|
len_to_track_end = 65536 - start_padding_sectors * 512; |
|
ccw->cda = (__u32)(addr_t)idaws; |
|
ccw->flags |= CCW_FLAG_IDA; |
|
ccw->flags |= CCW_FLAG_SLI; |
|
ccw++; |
|
for (sectors = 0; sectors < start_padding_sectors; sectors += 8) |
|
idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); |
|
} |
|
rq_for_each_segment(bv, req, iter) { |
|
dst = bvec_virt(&bv); |
|
seg_len = bv.bv_len; |
|
if (cmd == DASD_ECKD_CCW_READ_TRACK) |
|
memset(dst, 0, seg_len); |
|
if (!len_to_track_end) { |
|
ccw[-1].flags |= CCW_FLAG_CC; |
|
ccw->cmd_code = cmd; |
|
/* maximum 3390 track size */ |
|
ccw->count = 57326; |
|
/* 64k map to one track */ |
|
len_to_track_end = 65536; |
|
ccw->cda = (__u32)(addr_t)idaws; |
|
ccw->flags |= CCW_FLAG_IDA; |
|
ccw->flags |= CCW_FLAG_SLI; |
|
ccw++; |
|
} |
|
len_to_track_end -= seg_len; |
|
idaws = idal_create_words(idaws, dst, seg_len); |
|
} |
|
for (sectors = 0; sectors < end_padding_sectors; sectors += 8) |
|
idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); |
|
if (blk_noretry_request(req) || |
|
block->base->features & DASD_FEATURE_FAILFAST) |
|
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
|
cqr->startdev = startdev; |
|
cqr->memdev = startdev; |
|
cqr->block = block; |
|
cqr->expires = startdev->default_expires * HZ; |
|
cqr->lpm = dasd_path_get_ppm(startdev); |
|
cqr->retries = startdev->default_retries; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
|
|
return cqr; |
|
} |
|
|
|
|
|
static int |
|
dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) |
|
{ |
|
struct dasd_eckd_private *private; |
|
struct ccw1 *ccw; |
|
struct req_iterator iter; |
|
struct bio_vec bv; |
|
char *dst, *cda; |
|
unsigned int blksize, blk_per_trk, off; |
|
sector_t recid; |
|
int status; |
|
|
|
if (!dasd_page_cache) |
|
goto out; |
|
private = cqr->block->base->private; |
|
blksize = cqr->block->bp_block; |
|
blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
|
recid = blk_rq_pos(req) >> cqr->block->s2b_shift; |
|
ccw = cqr->cpaddr; |
|
/* Skip over define extent & locate record. */ |
|
ccw++; |
|
if (private->uses_cdl == 0 || recid > 2*blk_per_trk) |
|
ccw++; |
|
rq_for_each_segment(bv, req, iter) { |
|
dst = bvec_virt(&bv); |
|
for (off = 0; off < bv.bv_len; off += blksize) { |
|
/* Skip locate record. */ |
|
if (private->uses_cdl && recid <= 2*blk_per_trk) |
|
ccw++; |
|
if (dst) { |
|
if (ccw->flags & CCW_FLAG_IDA) |
|
cda = *((char **)((addr_t) ccw->cda)); |
|
else |
|
cda = (char *)((addr_t) ccw->cda); |
|
if (dst != cda) { |
|
if (rq_data_dir(req) == READ) |
|
memcpy(dst, cda, bv.bv_len); |
|
kmem_cache_free(dasd_page_cache, |
|
(void *)((addr_t)cda & PAGE_MASK)); |
|
} |
|
dst = NULL; |
|
} |
|
ccw++; |
|
recid++; |
|
} |
|
} |
|
out: |
|
status = cqr->status == DASD_CQR_DONE; |
|
dasd_sfree_request(cqr, cqr->memdev); |
|
return status; |
|
} |
|
|
|
/* |
|
* Modify ccw/tcw in cqr so it can be started on a base device. |
|
* |
|
* Note that this is not enough to restart the cqr! |
|
* Either reset cqr->startdev as well (summary unit check handling) |
|
* or restart via separate cqr (as in ERP handling). |
|
*/ |
|
void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) |
|
{ |
|
struct ccw1 *ccw; |
|
struct PFX_eckd_data *pfxdata; |
|
struct tcw *tcw; |
|
struct tccb *tccb; |
|
struct dcw *dcw; |
|
|
|
if (cqr->cpmode == 1) { |
|
tcw = cqr->cpaddr; |
|
tccb = tcw_get_tccb(tcw); |
|
dcw = (struct dcw *)&tccb->tca[0]; |
|
pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; |
|
pfxdata->validity.verify_base = 0; |
|
pfxdata->validity.hyper_pav = 0; |
|
} else { |
|
ccw = cqr->cpaddr; |
|
pfxdata = cqr->data; |
|
if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { |
|
pfxdata->validity.verify_base = 0; |
|
pfxdata->validity.hyper_pav = 0; |
|
} |
|
} |
|
} |
|
|
|
#define DASD_ECKD_CHANQ_MAX_SIZE 4 |
|
|
|
static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, |
|
struct dasd_block *block, |
|
struct request *req) |
|
{ |
|
struct dasd_eckd_private *private; |
|
struct dasd_device *startdev; |
|
unsigned long flags; |
|
struct dasd_ccw_req *cqr; |
|
|
|
startdev = dasd_alias_get_start_dev(base); |
|
if (!startdev) |
|
startdev = base; |
|
private = startdev->private; |
|
if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) |
|
return ERR_PTR(-EBUSY); |
|
|
|
spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); |
|
private->count++; |
|
if ((base->features & DASD_FEATURE_USERAW)) |
|
cqr = dasd_eckd_build_cp_raw(startdev, block, req); |
|
else |
|
cqr = dasd_eckd_build_cp(startdev, block, req); |
|
if (IS_ERR(cqr)) |
|
private->count--; |
|
spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); |
|
return cqr; |
|
} |
|
|
|
static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, |
|
struct request *req) |
|
{ |
|
struct dasd_eckd_private *private; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); |
|
private = cqr->memdev->private; |
|
private->count--; |
|
spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); |
|
return dasd_eckd_free_cp(cqr, req); |
|
} |
|
|
|
static int |
|
dasd_eckd_fill_info(struct dasd_device * device, |
|
struct dasd_information2_t * info) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
|
|
info->label_block = 2; |
|
info->FBA_layout = private->uses_cdl ? 0 : 1; |
|
info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; |
|
info->characteristics_size = sizeof(private->rdc_data); |
|
memcpy(info->characteristics, &private->rdc_data, |
|
sizeof(private->rdc_data)); |
|
info->confdata_size = min((unsigned long)private->conf_len, |
|
sizeof(info->configuration_data)); |
|
memcpy(info->configuration_data, private->conf_data, |
|
info->confdata_size); |
|
return 0; |
|
} |
|
|
|
/* |
|
* SECTION: ioctl functions for eckd devices. |
|
*/ |
|
|
|
/* |
|
* Release device ioctl. |
|
* Buils a channel programm to releases a prior reserved |
|
* (see dasd_eckd_reserve) device. |
|
*/ |
|
static int |
|
dasd_eckd_release(struct dasd_device *device) |
|
{ |
|
struct dasd_ccw_req *cqr; |
|
int rc; |
|
struct ccw1 *ccw; |
|
int useglobal; |
|
|
|
if (!capable(CAP_SYS_ADMIN)) |
|
return -EACCES; |
|
|
|
useglobal = 0; |
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); |
|
if (IS_ERR(cqr)) { |
|
mutex_lock(&dasd_reserve_mutex); |
|
useglobal = 1; |
|
cqr = &dasd_reserve_req->cqr; |
|
memset(cqr, 0, sizeof(*cqr)); |
|
memset(&dasd_reserve_req->ccw, 0, |
|
sizeof(dasd_reserve_req->ccw)); |
|
cqr->cpaddr = &dasd_reserve_req->ccw; |
|
cqr->data = &dasd_reserve_req->data; |
|
cqr->magic = DASD_ECKD_MAGIC; |
|
} |
|
ccw = cqr->cpaddr; |
|
ccw->cmd_code = DASD_ECKD_CCW_RELEASE; |
|
ccw->flags |= CCW_FLAG_SLI; |
|
ccw->count = 32; |
|
ccw->cda = (__u32)(addr_t) cqr->data; |
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
|
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
|
cqr->retries = 2; /* set retry counter to enable basic ERP */ |
|
cqr->expires = 2 * HZ; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
|
|
rc = dasd_sleep_on_immediatly(cqr); |
|
if (!rc) |
|
clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); |
|
|
|
if (useglobal) |
|
mutex_unlock(&dasd_reserve_mutex); |
|
else |
|
dasd_sfree_request(cqr, cqr->memdev); |
|
return rc; |
|
} |
|
|
|
/* |
|
* Reserve device ioctl. |
|
* Options are set to 'synchronous wait for interrupt' and |
|
* 'timeout the request'. This leads to a terminate IO if |
|
* the interrupt is outstanding for a certain time. |
|
*/ |
|
static int |
|
dasd_eckd_reserve(struct dasd_device *device) |
|
{ |
|
struct dasd_ccw_req *cqr; |
|
int rc; |
|
struct ccw1 *ccw; |
|
int useglobal; |
|
|
|
if (!capable(CAP_SYS_ADMIN)) |
|
return -EACCES; |
|
|
|
useglobal = 0; |
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); |
|
if (IS_ERR(cqr)) { |
|
mutex_lock(&dasd_reserve_mutex); |
|
useglobal = 1; |
|
cqr = &dasd_reserve_req->cqr; |
|
memset(cqr, 0, sizeof(*cqr)); |
|
memset(&dasd_reserve_req->ccw, 0, |
|
sizeof(dasd_reserve_req->ccw)); |
|
cqr->cpaddr = &dasd_reserve_req->ccw; |
|
cqr->data = &dasd_reserve_req->data; |
|
cqr->magic = DASD_ECKD_MAGIC; |
|
} |
|
ccw = cqr->cpaddr; |
|
ccw->cmd_code = DASD_ECKD_CCW_RESERVE; |
|
ccw->flags |= CCW_FLAG_SLI; |
|
ccw->count = 32; |
|
ccw->cda = (__u32)(addr_t) cqr->data; |
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
|
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
|
cqr->retries = 2; /* set retry counter to enable basic ERP */ |
|
cqr->expires = 2 * HZ; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
|
|
rc = dasd_sleep_on_immediatly(cqr); |
|
if (!rc) |
|
set_bit(DASD_FLAG_IS_RESERVED, &device->flags); |
|
|
|
if (useglobal) |
|
mutex_unlock(&dasd_reserve_mutex); |
|
else |
|
dasd_sfree_request(cqr, cqr->memdev); |
|
return rc; |
|
} |
|
|
|
/* |
|
* Steal lock ioctl - unconditional reserve device. |
|
* Buils a channel programm to break a device's reservation. |
|
* (unconditional reserve) |
|
*/ |
|
static int |
|
dasd_eckd_steal_lock(struct dasd_device *device) |
|
{ |
|
struct dasd_ccw_req *cqr; |
|
int rc; |
|
struct ccw1 *ccw; |
|
int useglobal; |
|
|
|
if (!capable(CAP_SYS_ADMIN)) |
|
return -EACCES; |
|
|
|
useglobal = 0; |
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); |
|
if (IS_ERR(cqr)) { |
|
mutex_lock(&dasd_reserve_mutex); |
|
useglobal = 1; |
|
cqr = &dasd_reserve_req->cqr; |
|
memset(cqr, 0, sizeof(*cqr)); |
|
memset(&dasd_reserve_req->ccw, 0, |
|
sizeof(dasd_reserve_req->ccw)); |
|
cqr->cpaddr = &dasd_reserve_req->ccw; |
|
cqr->data = &dasd_reserve_req->data; |
|
cqr->magic = DASD_ECKD_MAGIC; |
|
} |
|
ccw = cqr->cpaddr; |
|
ccw->cmd_code = DASD_ECKD_CCW_SLCK; |
|
ccw->flags |= CCW_FLAG_SLI; |
|
ccw->count = 32; |
|
ccw->cda = (__u32)(addr_t) cqr->data; |
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
|
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
|
cqr->retries = 2; /* set retry counter to enable basic ERP */ |
|
cqr->expires = 2 * HZ; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
|
|
rc = dasd_sleep_on_immediatly(cqr); |
|
if (!rc) |
|
set_bit(DASD_FLAG_IS_RESERVED, &device->flags); |
|
|
|
if (useglobal) |
|
mutex_unlock(&dasd_reserve_mutex); |
|
else |
|
dasd_sfree_request(cqr, cqr->memdev); |
|
return rc; |
|
} |
|
|
|
/* |
|
* SNID - Sense Path Group ID |
|
* This ioctl may be used in situations where I/O is stalled due to |
|
* a reserve, so if the normal dasd_smalloc_request fails, we use the |
|
* preallocated dasd_reserve_req. |
|
*/ |
|
static int dasd_eckd_snid(struct dasd_device *device, |
|
void __user *argp) |
|
{ |
|
struct dasd_ccw_req *cqr; |
|
int rc; |
|
struct ccw1 *ccw; |
|
int useglobal; |
|
struct dasd_snid_ioctl_data usrparm; |
|
|
|
if (!capable(CAP_SYS_ADMIN)) |
|
return -EACCES; |
|
|
|
if (copy_from_user(&usrparm, argp, sizeof(usrparm))) |
|
return -EFAULT; |
|
|
|
useglobal = 0; |
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, |
|
sizeof(struct dasd_snid_data), device, |
|
NULL); |
|
if (IS_ERR(cqr)) { |
|
mutex_lock(&dasd_reserve_mutex); |
|
useglobal = 1; |
|
cqr = &dasd_reserve_req->cqr; |
|
memset(cqr, 0, sizeof(*cqr)); |
|
memset(&dasd_reserve_req->ccw, 0, |
|
sizeof(dasd_reserve_req->ccw)); |
|
cqr->cpaddr = &dasd_reserve_req->ccw; |
|
cqr->data = &dasd_reserve_req->data; |
|
cqr->magic = DASD_ECKD_MAGIC; |
|
} |
|
ccw = cqr->cpaddr; |
|
ccw->cmd_code = DASD_ECKD_CCW_SNID; |
|
ccw->flags |= CCW_FLAG_SLI; |
|
ccw->count = 12; |
|
ccw->cda = (__u32)(addr_t) cqr->data; |
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
|
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
|
set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
|
cqr->retries = 5; |
|
cqr->expires = 10 * HZ; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
cqr->lpm = usrparm.path_mask; |
|
|
|
rc = dasd_sleep_on_immediatly(cqr); |
|
/* verify that I/O processing didn't modify the path mask */ |
|
if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) |
|
rc = -EIO; |
|
if (!rc) { |
|
usrparm.data = *((struct dasd_snid_data *)cqr->data); |
|
if (copy_to_user(argp, &usrparm, sizeof(usrparm))) |
|
rc = -EFAULT; |
|
} |
|
|
|
if (useglobal) |
|
mutex_unlock(&dasd_reserve_mutex); |
|
else |
|
dasd_sfree_request(cqr, cqr->memdev); |
|
return rc; |
|
} |
|
|
|
/* |
|
* Read performance statistics |
|
*/ |
|
static int |
|
dasd_eckd_performance(struct dasd_device *device, void __user *argp) |
|
{ |
|
struct dasd_psf_prssd_data *prssdp; |
|
struct dasd_rssd_perf_stats_t *stats; |
|
struct dasd_ccw_req *cqr; |
|
struct ccw1 *ccw; |
|
int rc; |
|
|
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
|
(sizeof(struct dasd_psf_prssd_data) + |
|
sizeof(struct dasd_rssd_perf_stats_t)), |
|
device, NULL); |
|
if (IS_ERR(cqr)) { |
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
|
"Could not allocate initialization request"); |
|
return PTR_ERR(cqr); |
|
} |
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
cqr->retries = 0; |
|
clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
|
cqr->expires = 10 * HZ; |
|
|
|
/* Prepare for Read Subsystem Data */ |
|
prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
|
memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); |
|
prssdp->order = PSF_ORDER_PRSSD; |
|
prssdp->suborder = 0x01; /* Performance Statistics */ |
|
prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ |
|
|
|
ccw = cqr->cpaddr; |
|
ccw->cmd_code = DASD_ECKD_CCW_PSF; |
|
ccw->count = sizeof(struct dasd_psf_prssd_data); |
|
ccw->flags |= CCW_FLAG_CC; |
|
ccw->cda = (__u32)(addr_t) prssdp; |
|
|
|
/* Read Subsystem Data - Performance Statistics */ |
|
stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); |
|
memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); |
|
|
|
ccw++; |
|
ccw->cmd_code = DASD_ECKD_CCW_RSSD; |
|
ccw->count = sizeof(struct dasd_rssd_perf_stats_t); |
|
ccw->cda = (__u32)(addr_t) stats; |
|
|
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
rc = dasd_sleep_on(cqr); |
|
if (rc == 0) { |
|
prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
|
stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); |
|
if (copy_to_user(argp, stats, |
|
sizeof(struct dasd_rssd_perf_stats_t))) |
|
rc = -EFAULT; |
|
} |
|
dasd_sfree_request(cqr, cqr->memdev); |
|
return rc; |
|
} |
|
|
|
/* |
|
* Get attributes (cache operations) |
|
* Returnes the cache attributes used in Define Extend (DE). |
|
*/ |
|
static int |
|
dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
struct attrib_data_t attrib = private->attrib; |
|
int rc; |
|
|
|
if (!capable(CAP_SYS_ADMIN)) |
|
return -EACCES; |
|
if (!argp) |
|
return -EINVAL; |
|
|
|
rc = 0; |
|
if (copy_to_user(argp, (long *) &attrib, |
|
sizeof(struct attrib_data_t))) |
|
rc = -EFAULT; |
|
|
|
return rc; |
|
} |
|
|
|
/* |
|
* Set attributes (cache operations) |
|
* Stores the attributes for cache operation to be used in Define Extend (DE). |
|
*/ |
|
static int |
|
dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
struct attrib_data_t attrib; |
|
|
|
if (!capable(CAP_SYS_ADMIN)) |
|
return -EACCES; |
|
if (!argp) |
|
return -EINVAL; |
|
|
|
if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) |
|
return -EFAULT; |
|
private->attrib = attrib; |
|
|
|
dev_info(&device->cdev->dev, |
|
"The DASD cache mode was set to %x (%i cylinder prestage)\n", |
|
private->attrib.operation, private->attrib.nr_cyl); |
|
return 0; |
|
} |
|
|
|
/* |
|
* Issue syscall I/O to EMC Symmetrix array. |
|
* CCWs are PSF and RSSD |
|
*/ |
|
static int dasd_symm_io(struct dasd_device *device, void __user *argp) |
|
{ |
|
struct dasd_symmio_parms usrparm; |
|
char *psf_data, *rssd_result; |
|
struct dasd_ccw_req *cqr; |
|
struct ccw1 *ccw; |
|
char psf0, psf1; |
|
int rc; |
|
|
|
if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) |
|
return -EACCES; |
|
psf0 = psf1 = 0; |
|
|
|
/* Copy parms from caller */ |
|
rc = -EFAULT; |
|
if (copy_from_user(&usrparm, argp, sizeof(usrparm))) |
|
goto out; |
|
if (is_compat_task()) { |
|
/* Make sure pointers are sane even on 31 bit. */ |
|
rc = -EINVAL; |
|
if ((usrparm.psf_data >> 32) != 0) |
|
goto out; |
|
if ((usrparm.rssd_result >> 32) != 0) |
|
goto out; |
|
usrparm.psf_data &= 0x7fffffffULL; |
|
usrparm.rssd_result &= 0x7fffffffULL; |
|
} |
|
/* at least 2 bytes are accessed and should be allocated */ |
|
if (usrparm.psf_data_len < 2) { |
|
DBF_DEV_EVENT(DBF_WARNING, device, |
|
"Symmetrix ioctl invalid data length %d", |
|
usrparm.psf_data_len); |
|
rc = -EINVAL; |
|
goto out; |
|
} |
|
/* alloc I/O data area */ |
|
psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); |
|
rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); |
|
if (!psf_data || !rssd_result) { |
|
rc = -ENOMEM; |
|
goto out_free; |
|
} |
|
|
|
/* get syscall header from user space */ |
|
rc = -EFAULT; |
|
if (copy_from_user(psf_data, |
|
(void __user *)(unsigned long) usrparm.psf_data, |
|
usrparm.psf_data_len)) |
|
goto out_free; |
|
psf0 = psf_data[0]; |
|
psf1 = psf_data[1]; |
|
|
|
/* setup CCWs for PSF + RSSD */ |
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); |
|
if (IS_ERR(cqr)) { |
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
|
"Could not allocate initialization request"); |
|
rc = PTR_ERR(cqr); |
|
goto out_free; |
|
} |
|
|
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
cqr->retries = 3; |
|
cqr->expires = 10 * HZ; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
|
|
/* Build the ccws */ |
|
ccw = cqr->cpaddr; |
|
|
|
/* PSF ccw */ |
|
ccw->cmd_code = DASD_ECKD_CCW_PSF; |
|
ccw->count = usrparm.psf_data_len; |
|
ccw->flags |= CCW_FLAG_CC; |
|
ccw->cda = (__u32)(addr_t) psf_data; |
|
|
|
ccw++; |
|
|
|
/* RSSD ccw */ |
|
ccw->cmd_code = DASD_ECKD_CCW_RSSD; |
|
ccw->count = usrparm.rssd_result_len; |
|
ccw->flags = CCW_FLAG_SLI ; |
|
ccw->cda = (__u32)(addr_t) rssd_result; |
|
|
|
rc = dasd_sleep_on(cqr); |
|
if (rc) |
|
goto out_sfree; |
|
|
|
rc = -EFAULT; |
|
if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, |
|
rssd_result, usrparm.rssd_result_len)) |
|
goto out_sfree; |
|
rc = 0; |
|
|
|
out_sfree: |
|
dasd_sfree_request(cqr, cqr->memdev); |
|
out_free: |
|
kfree(rssd_result); |
|
kfree(psf_data); |
|
out: |
|
DBF_DEV_EVENT(DBF_WARNING, device, |
|
"Symmetrix ioctl (0x%02x 0x%02x): rc=%d", |
|
(int) psf0, (int) psf1, rc); |
|
return rc; |
|
} |
|
|
|
static int |
|
dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) |
|
{ |
|
struct dasd_device *device = block->base; |
|
|
|
switch (cmd) { |
|
case BIODASDGATTR: |
|
return dasd_eckd_get_attrib(device, argp); |
|
case BIODASDSATTR: |
|
return dasd_eckd_set_attrib(device, argp); |
|
case BIODASDPSRD: |
|
return dasd_eckd_performance(device, argp); |
|
case BIODASDRLSE: |
|
return dasd_eckd_release(device); |
|
case BIODASDRSRV: |
|
return dasd_eckd_reserve(device); |
|
case BIODASDSLCK: |
|
return dasd_eckd_steal_lock(device); |
|
case BIODASDSNID: |
|
return dasd_eckd_snid(device, argp); |
|
case BIODASDSYMMIO: |
|
return dasd_symm_io(device, argp); |
|
default: |
|
return -ENOTTY; |
|
} |
|
} |
|
|
|
/* |
|
* Dump the range of CCWs into 'page' buffer |
|
* and return number of printed chars. |
|
*/ |
|
static int |
|
dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) |
|
{ |
|
int len, count; |
|
char *datap; |
|
|
|
len = 0; |
|
while (from <= to) { |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" CCW %p: %08X %08X DAT:", |
|
from, ((int *) from)[0], ((int *) from)[1]); |
|
|
|
/* get pointer to data (consider IDALs) */ |
|
if (from->flags & CCW_FLAG_IDA) |
|
datap = (char *) *((addr_t *) (addr_t) from->cda); |
|
else |
|
datap = (char *) ((addr_t) from->cda); |
|
|
|
/* dump data (max 32 bytes) */ |
|
for (count = 0; count < from->count && count < 32; count++) { |
|
if (count % 8 == 0) len += sprintf(page + len, " "); |
|
if (count % 4 == 0) len += sprintf(page + len, " "); |
|
len += sprintf(page + len, "%02x", datap[count]); |
|
} |
|
len += sprintf(page + len, "\n"); |
|
from++; |
|
} |
|
return len; |
|
} |
|
|
|
static void |
|
dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, |
|
char *reason) |
|
{ |
|
u64 *sense; |
|
u64 *stat; |
|
|
|
sense = (u64 *) dasd_get_sense(irb); |
|
stat = (u64 *) &irb->scsw; |
|
if (sense) { |
|
DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " |
|
"%016llx %016llx %016llx %016llx", |
|
reason, *stat, *((u32 *) (stat + 1)), |
|
sense[0], sense[1], sense[2], sense[3]); |
|
} else { |
|
DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", |
|
reason, *stat, *((u32 *) (stat + 1)), |
|
"NO VALID SENSE"); |
|
} |
|
} |
|
|
|
/* |
|
* Print sense data and related channel program. |
|
* Parts are printed because printk buffer is only 1024 bytes. |
|
*/ |
|
static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, |
|
struct dasd_ccw_req *req, struct irb *irb) |
|
{ |
|
char *page; |
|
struct ccw1 *first, *last, *fail, *from, *to; |
|
int len, sl, sct; |
|
|
|
page = (char *) get_zeroed_page(GFP_ATOMIC); |
|
if (page == NULL) { |
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
|
"No memory to dump sense data\n"); |
|
return; |
|
} |
|
/* dump the sense data */ |
|
len = sprintf(page, PRINTK_HEADER |
|
" I/O status report for device %s:\n", |
|
dev_name(&device->cdev->dev)); |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
|
"CS:%02X RC:%d\n", |
|
req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), |
|
scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), |
|
scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), |
|
req ? req->intrc : 0); |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" device %s: Failing CCW: %p\n", |
|
dev_name(&device->cdev->dev), |
|
(void *) (addr_t) irb->scsw.cmd.cpa); |
|
if (irb->esw.esw0.erw.cons) { |
|
for (sl = 0; sl < 4; sl++) { |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" Sense(hex) %2d-%2d:", |
|
(8 * sl), ((8 * sl) + 7)); |
|
|
|
for (sct = 0; sct < 8; sct++) { |
|
len += sprintf(page + len, " %02x", |
|
irb->ecw[8 * sl + sct]); |
|
} |
|
len += sprintf(page + len, "\n"); |
|
} |
|
|
|
if (irb->ecw[27] & DASD_SENSE_BIT_0) { |
|
/* 24 Byte Sense Data */ |
|
sprintf(page + len, PRINTK_HEADER |
|
" 24 Byte: %x MSG %x, " |
|
"%s MSGb to SYSOP\n", |
|
irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, |
|
irb->ecw[1] & 0x10 ? "" : "no"); |
|
} else { |
|
/* 32 Byte Sense Data */ |
|
sprintf(page + len, PRINTK_HEADER |
|
" 32 Byte: Format: %x " |
|
"Exception class %x\n", |
|
irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); |
|
} |
|
} else { |
|
sprintf(page + len, PRINTK_HEADER |
|
" SORRY - NO VALID SENSE AVAILABLE\n"); |
|
} |
|
printk(KERN_ERR "%s", page); |
|
|
|
if (req) { |
|
/* req == NULL for unsolicited interrupts */ |
|
/* dump the Channel Program (max 140 Bytes per line) */ |
|
/* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ |
|
first = req->cpaddr; |
|
for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); |
|
to = min(first + 6, last); |
|
len = sprintf(page, PRINTK_HEADER |
|
" Related CP in req: %p\n", req); |
|
dasd_eckd_dump_ccw_range(first, to, page + len); |
|
printk(KERN_ERR "%s", page); |
|
|
|
/* print failing CCW area (maximum 4) */ |
|
/* scsw->cda is either valid or zero */ |
|
len = 0; |
|
from = ++to; |
|
fail = (struct ccw1 *)(addr_t) |
|
irb->scsw.cmd.cpa; /* failing CCW */ |
|
if (from < fail - 2) { |
|
from = fail - 2; /* there is a gap - print header */ |
|
len += sprintf(page, PRINTK_HEADER "......\n"); |
|
} |
|
to = min(fail + 1, last); |
|
len += dasd_eckd_dump_ccw_range(from, to, page + len); |
|
|
|
/* print last CCWs (maximum 2) */ |
|
from = max(from, ++to); |
|
if (from < last - 1) { |
|
from = last - 1; /* there is a gap - print header */ |
|
len += sprintf(page + len, PRINTK_HEADER "......\n"); |
|
} |
|
len += dasd_eckd_dump_ccw_range(from, last, page + len); |
|
if (len > 0) |
|
printk(KERN_ERR "%s", page); |
|
} |
|
free_page((unsigned long) page); |
|
} |
|
|
|
|
|
/* |
|
* Print sense data from a tcw. |
|
*/ |
|
static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, |
|
struct dasd_ccw_req *req, struct irb *irb) |
|
{ |
|
char *page; |
|
int len, sl, sct, residual; |
|
struct tsb *tsb; |
|
u8 *sense, *rcq; |
|
|
|
page = (char *) get_zeroed_page(GFP_ATOMIC); |
|
if (page == NULL) { |
|
DBF_DEV_EVENT(DBF_WARNING, device, " %s", |
|
"No memory to dump sense data"); |
|
return; |
|
} |
|
/* dump the sense data */ |
|
len = sprintf(page, PRINTK_HEADER |
|
" I/O status report for device %s:\n", |
|
dev_name(&device->cdev->dev)); |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
|
"CS:%02X fcxs:%02X schxs:%02X RC:%d\n", |
|
req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), |
|
scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), |
|
scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), |
|
irb->scsw.tm.fcxs, |
|
(irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, |
|
req ? req->intrc : 0); |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" device %s: Failing TCW: %p\n", |
|
dev_name(&device->cdev->dev), |
|
(void *) (addr_t) irb->scsw.tm.tcw); |
|
|
|
tsb = NULL; |
|
sense = NULL; |
|
if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) |
|
tsb = tcw_get_tsb( |
|
(struct tcw *)(unsigned long)irb->scsw.tm.tcw); |
|
|
|
if (tsb) { |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" tsb->length %d\n", tsb->length); |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" tsb->flags %x\n", tsb->flags); |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" tsb->dcw_offset %d\n", tsb->dcw_offset); |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" tsb->count %d\n", tsb->count); |
|
residual = tsb->count - 28; |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" residual %d\n", residual); |
|
|
|
switch (tsb->flags & 0x07) { |
|
case 1: /* tsa_iostat */ |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" tsb->tsa.iostat.dev_time %d\n", |
|
tsb->tsa.iostat.dev_time); |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" tsb->tsa.iostat.def_time %d\n", |
|
tsb->tsa.iostat.def_time); |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" tsb->tsa.iostat.queue_time %d\n", |
|
tsb->tsa.iostat.queue_time); |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" tsb->tsa.iostat.dev_busy_time %d\n", |
|
tsb->tsa.iostat.dev_busy_time); |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" tsb->tsa.iostat.dev_act_time %d\n", |
|
tsb->tsa.iostat.dev_act_time); |
|
sense = tsb->tsa.iostat.sense; |
|
break; |
|
case 2: /* ts_ddpc */ |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); |
|
for (sl = 0; sl < 2; sl++) { |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" tsb->tsa.ddpc.rcq %2d-%2d: ", |
|
(8 * sl), ((8 * sl) + 7)); |
|
rcq = tsb->tsa.ddpc.rcq; |
|
for (sct = 0; sct < 8; sct++) { |
|
len += sprintf(page + len, " %02x", |
|
rcq[8 * sl + sct]); |
|
} |
|
len += sprintf(page + len, "\n"); |
|
} |
|
sense = tsb->tsa.ddpc.sense; |
|
break; |
|
case 3: /* tsa_intrg */ |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" tsb->tsa.intrg.: not supported yet\n"); |
|
break; |
|
} |
|
|
|
if (sense) { |
|
for (sl = 0; sl < 4; sl++) { |
|
len += sprintf(page + len, PRINTK_HEADER |
|
" Sense(hex) %2d-%2d:", |
|
(8 * sl), ((8 * sl) + 7)); |
|
for (sct = 0; sct < 8; sct++) { |
|
len += sprintf(page + len, " %02x", |
|
sense[8 * sl + sct]); |
|
} |
|
len += sprintf(page + len, "\n"); |
|
} |
|
|
|
if (sense[27] & DASD_SENSE_BIT_0) { |
|
/* 24 Byte Sense Data */ |
|
sprintf(page + len, PRINTK_HEADER |
|
" 24 Byte: %x MSG %x, " |
|
"%s MSGb to SYSOP\n", |
|
sense[7] >> 4, sense[7] & 0x0f, |
|
sense[1] & 0x10 ? "" : "no"); |
|
} else { |
|
/* 32 Byte Sense Data */ |
|
sprintf(page + len, PRINTK_HEADER |
|
" 32 Byte: Format: %x " |
|
"Exception class %x\n", |
|
sense[6] & 0x0f, sense[22] >> 4); |
|
} |
|
} else { |
|
sprintf(page + len, PRINTK_HEADER |
|
" SORRY - NO VALID SENSE AVAILABLE\n"); |
|
} |
|
} else { |
|
sprintf(page + len, PRINTK_HEADER |
|
" SORRY - NO TSB DATA AVAILABLE\n"); |
|
} |
|
printk(KERN_ERR "%s", page); |
|
free_page((unsigned long) page); |
|
} |
|
|
|
static void dasd_eckd_dump_sense(struct dasd_device *device, |
|
struct dasd_ccw_req *req, struct irb *irb) |
|
{ |
|
u8 *sense = dasd_get_sense(irb); |
|
|
|
if (scsw_is_tm(&irb->scsw)) { |
|
/* |
|
* In some cases the 'File Protected' or 'Incorrect Length' |
|
* error might be expected and log messages shouldn't be written |
|
* then. Check if the according suppress bit is set. |
|
*/ |
|
if (sense && (sense[1] & SNS1_FILE_PROTECTED) && |
|
test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) |
|
return; |
|
if (scsw_cstat(&irb->scsw) == 0x40 && |
|
test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) |
|
return; |
|
|
|
dasd_eckd_dump_sense_tcw(device, req, irb); |
|
} else { |
|
/* |
|
* In some cases the 'Command Reject' or 'No Record Found' |
|
* error might be expected and log messages shouldn't be |
|
* written then. Check if the according suppress bit is set. |
|
*/ |
|
if (sense && sense[0] & SNS0_CMD_REJECT && |
|
test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) |
|
return; |
|
|
|
if (sense && sense[1] & SNS1_NO_REC_FOUND && |
|
test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) |
|
return; |
|
|
|
dasd_eckd_dump_sense_ccw(device, req, irb); |
|
} |
|
} |
|
|
|
static int dasd_eckd_reload_device(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
int rc, old_base; |
|
char print_uid[60]; |
|
struct dasd_uid uid; |
|
unsigned long flags; |
|
|
|
/* |
|
* remove device from alias handling to prevent new requests |
|
* from being scheduled on the wrong alias device |
|
*/ |
|
dasd_alias_remove_device(device); |
|
|
|
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
|
old_base = private->uid.base_unit_addr; |
|
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
|
|
|
/* Read Configuration Data */ |
|
rc = dasd_eckd_read_conf(device); |
|
if (rc) |
|
goto out_err; |
|
|
|
rc = dasd_eckd_generate_uid(device); |
|
if (rc) |
|
goto out_err; |
|
/* |
|
* update unit address configuration and |
|
* add device to alias management |
|
*/ |
|
dasd_alias_update_add_device(device); |
|
|
|
dasd_eckd_get_uid(device, &uid); |
|
|
|
if (old_base != uid.base_unit_addr) { |
|
if (strlen(uid.vduit) > 0) |
|
snprintf(print_uid, sizeof(print_uid), |
|
"%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, |
|
uid.ssid, uid.base_unit_addr, uid.vduit); |
|
else |
|
snprintf(print_uid, sizeof(print_uid), |
|
"%s.%s.%04x.%02x", uid.vendor, uid.serial, |
|
uid.ssid, uid.base_unit_addr); |
|
|
|
dev_info(&device->cdev->dev, |
|
"An Alias device was reassigned to a new base device " |
|
"with UID: %s\n", print_uid); |
|
} |
|
return 0; |
|
|
|
out_err: |
|
return -1; |
|
} |
|
|
|
static int dasd_eckd_read_message_buffer(struct dasd_device *device, |
|
struct dasd_rssd_messages *messages, |
|
__u8 lpum) |
|
{ |
|
struct dasd_rssd_messages *message_buf; |
|
struct dasd_psf_prssd_data *prssdp; |
|
struct dasd_ccw_req *cqr; |
|
struct ccw1 *ccw; |
|
int rc; |
|
|
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
|
(sizeof(struct dasd_psf_prssd_data) + |
|
sizeof(struct dasd_rssd_messages)), |
|
device, NULL); |
|
if (IS_ERR(cqr)) { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
|
"Could not allocate read message buffer request"); |
|
return PTR_ERR(cqr); |
|
} |
|
|
|
cqr->lpm = lpum; |
|
retry: |
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
cqr->block = NULL; |
|
cqr->expires = 10 * HZ; |
|
set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
|
/* dasd_sleep_on_immediatly does not do complex error |
|
* recovery so clear erp flag and set retry counter to |
|
* do basic erp */ |
|
clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
|
cqr->retries = 256; |
|
|
|
/* Prepare for Read Subsystem Data */ |
|
prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
|
memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); |
|
prssdp->order = PSF_ORDER_PRSSD; |
|
prssdp->suborder = 0x03; /* Message Buffer */ |
|
/* all other bytes of prssdp must be zero */ |
|
|
|
ccw = cqr->cpaddr; |
|
ccw->cmd_code = DASD_ECKD_CCW_PSF; |
|
ccw->count = sizeof(struct dasd_psf_prssd_data); |
|
ccw->flags |= CCW_FLAG_CC; |
|
ccw->flags |= CCW_FLAG_SLI; |
|
ccw->cda = (__u32)(addr_t) prssdp; |
|
|
|
/* Read Subsystem Data - message buffer */ |
|
message_buf = (struct dasd_rssd_messages *) (prssdp + 1); |
|
memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); |
|
|
|
ccw++; |
|
ccw->cmd_code = DASD_ECKD_CCW_RSSD; |
|
ccw->count = sizeof(struct dasd_rssd_messages); |
|
ccw->flags |= CCW_FLAG_SLI; |
|
ccw->cda = (__u32)(addr_t) message_buf; |
|
|
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
rc = dasd_sleep_on_immediatly(cqr); |
|
if (rc == 0) { |
|
prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
|
message_buf = (struct dasd_rssd_messages *) |
|
(prssdp + 1); |
|
memcpy(messages, message_buf, |
|
sizeof(struct dasd_rssd_messages)); |
|
} else if (cqr->lpm) { |
|
/* |
|
* on z/VM we might not be able to do I/O on the requested path |
|
* but instead we get the required information on any path |
|
* so retry with open path mask |
|
*/ |
|
cqr->lpm = 0; |
|
goto retry; |
|
} else |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
|
"Reading messages failed with rc=%d\n" |
|
, rc); |
|
dasd_sfree_request(cqr, cqr->memdev); |
|
return rc; |
|
} |
|
|
|
static int dasd_eckd_query_host_access(struct dasd_device *device, |
|
struct dasd_psf_query_host_access *data) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
struct dasd_psf_query_host_access *host_access; |
|
struct dasd_psf_prssd_data *prssdp; |
|
struct dasd_ccw_req *cqr; |
|
struct ccw1 *ccw; |
|
int rc; |
|
|
|
/* not available for HYPER PAV alias devices */ |
|
if (!device->block && private->lcu->pav == HYPER_PAV) |
|
return -EOPNOTSUPP; |
|
|
|
/* may not be supported by the storage server */ |
|
if (!(private->features.feature[14] & 0x80)) |
|
return -EOPNOTSUPP; |
|
|
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
|
sizeof(struct dasd_psf_prssd_data) + 1, |
|
device, NULL); |
|
if (IS_ERR(cqr)) { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
|
"Could not allocate read message buffer request"); |
|
return PTR_ERR(cqr); |
|
} |
|
host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); |
|
if (!host_access) { |
|
dasd_sfree_request(cqr, device); |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
|
"Could not allocate host_access buffer"); |
|
return -ENOMEM; |
|
} |
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
cqr->block = NULL; |
|
cqr->retries = 256; |
|
cqr->expires = 10 * HZ; |
|
|
|
/* Prepare for Read Subsystem Data */ |
|
prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
|
memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); |
|
prssdp->order = PSF_ORDER_PRSSD; |
|
prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ |
|
/* LSS and Volume that will be queried */ |
|
prssdp->lss = private->ned->ID; |
|
prssdp->volume = private->ned->unit_addr; |
|
/* all other bytes of prssdp must be zero */ |
|
|
|
ccw = cqr->cpaddr; |
|
ccw->cmd_code = DASD_ECKD_CCW_PSF; |
|
ccw->count = sizeof(struct dasd_psf_prssd_data); |
|
ccw->flags |= CCW_FLAG_CC; |
|
ccw->flags |= CCW_FLAG_SLI; |
|
ccw->cda = (__u32)(addr_t) prssdp; |
|
|
|
/* Read Subsystem Data - query host access */ |
|
ccw++; |
|
ccw->cmd_code = DASD_ECKD_CCW_RSSD; |
|
ccw->count = sizeof(struct dasd_psf_query_host_access); |
|
ccw->flags |= CCW_FLAG_SLI; |
|
ccw->cda = (__u32)(addr_t) host_access; |
|
|
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
/* the command might not be supported, suppress error message */ |
|
__set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); |
|
rc = dasd_sleep_on_interruptible(cqr); |
|
if (rc == 0) { |
|
*data = *host_access; |
|
} else { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
|
"Reading host access data failed with rc=%d\n", |
|
rc); |
|
rc = -EOPNOTSUPP; |
|
} |
|
|
|
dasd_sfree_request(cqr, cqr->memdev); |
|
kfree(host_access); |
|
return rc; |
|
} |
|
/* |
|
* return number of grouped devices |
|
*/ |
|
static int dasd_eckd_host_access_count(struct dasd_device *device) |
|
{ |
|
struct dasd_psf_query_host_access *access; |
|
struct dasd_ckd_path_group_entry *entry; |
|
struct dasd_ckd_host_information *info; |
|
int count = 0; |
|
int rc, i; |
|
|
|
access = kzalloc(sizeof(*access), GFP_NOIO); |
|
if (!access) { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
|
"Could not allocate access buffer"); |
|
return -ENOMEM; |
|
} |
|
rc = dasd_eckd_query_host_access(device, access); |
|
if (rc) { |
|
kfree(access); |
|
return rc; |
|
} |
|
|
|
info = (struct dasd_ckd_host_information *) |
|
access->host_access_information; |
|
for (i = 0; i < info->entry_count; i++) { |
|
entry = (struct dasd_ckd_path_group_entry *) |
|
(info->entry + i * info->entry_size); |
|
if (entry->status_flags & DASD_ECKD_PG_GROUPED) |
|
count++; |
|
} |
|
|
|
kfree(access); |
|
return count; |
|
} |
|
|
|
/* |
|
* write host access information to a sequential file |
|
*/ |
|
static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) |
|
{ |
|
struct dasd_psf_query_host_access *access; |
|
struct dasd_ckd_path_group_entry *entry; |
|
struct dasd_ckd_host_information *info; |
|
char sysplex[9] = ""; |
|
int rc, i; |
|
|
|
access = kzalloc(sizeof(*access), GFP_NOIO); |
|
if (!access) { |
|
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
|
"Could not allocate access buffer"); |
|
return -ENOMEM; |
|
} |
|
rc = dasd_eckd_query_host_access(device, access); |
|
if (rc) { |
|
kfree(access); |
|
return rc; |
|
} |
|
|
|
info = (struct dasd_ckd_host_information *) |
|
access->host_access_information; |
|
for (i = 0; i < info->entry_count; i++) { |
|
entry = (struct dasd_ckd_path_group_entry *) |
|
(info->entry + i * info->entry_size); |
|
/* PGID */ |
|
seq_printf(m, "pgid %*phN\n", 11, entry->pgid); |
|
/* FLAGS */ |
|
seq_printf(m, "status_flags %02x\n", entry->status_flags); |
|
/* SYSPLEX NAME */ |
|
memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); |
|
EBCASC(sysplex, sizeof(sysplex)); |
|
seq_printf(m, "sysplex_name %8s\n", sysplex); |
|
/* SUPPORTED CYLINDER */ |
|
seq_printf(m, "supported_cylinder %d\n", entry->cylinder); |
|
/* TIMESTAMP */ |
|
seq_printf(m, "timestamp %lu\n", (unsigned long) |
|
entry->timestamp); |
|
} |
|
kfree(access); |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Perform Subsystem Function - CUIR response |
|
*/ |
|
static int |
|
dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, |
|
__u32 message_id, __u8 lpum) |
|
{ |
|
struct dasd_psf_cuir_response *psf_cuir; |
|
int pos = pathmask_to_pos(lpum); |
|
struct dasd_ccw_req *cqr; |
|
struct ccw1 *ccw; |
|
int rc; |
|
|
|
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , |
|
sizeof(struct dasd_psf_cuir_response), |
|
device, NULL); |
|
|
|
if (IS_ERR(cqr)) { |
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
|
"Could not allocate PSF-CUIR request"); |
|
return PTR_ERR(cqr); |
|
} |
|
|
|
psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; |
|
psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; |
|
psf_cuir->cc = response; |
|
psf_cuir->chpid = device->path[pos].chpid; |
|
psf_cuir->message_id = message_id; |
|
psf_cuir->cssid = device->path[pos].cssid; |
|
psf_cuir->ssid = device->path[pos].ssid; |
|
ccw = cqr->cpaddr; |
|
ccw->cmd_code = DASD_ECKD_CCW_PSF; |
|
ccw->cda = (__u32)(addr_t)psf_cuir; |
|
ccw->flags = CCW_FLAG_SLI; |
|
ccw->count = sizeof(struct dasd_psf_cuir_response); |
|
|
|
cqr->startdev = device; |
|
cqr->memdev = device; |
|
cqr->block = NULL; |
|
cqr->retries = 256; |
|
cqr->expires = 10*HZ; |
|
cqr->buildclk = get_tod_clock(); |
|
cqr->status = DASD_CQR_FILLED; |
|
set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
|
|
|
rc = dasd_sleep_on(cqr); |
|
|
|
dasd_sfree_request(cqr, cqr->memdev); |
|
return rc; |
|
} |
|
|
|
/* |
|
* return configuration data that is referenced by record selector |
|
* if a record selector is specified or per default return the |
|
* conf_data pointer for the path specified by lpum |
|
*/ |
|
static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, |
|
__u8 lpum, |
|
struct dasd_cuir_message *cuir) |
|
{ |
|
struct dasd_conf_data *conf_data; |
|
int path, pos; |
|
|
|
if (cuir->record_selector == 0) |
|
goto out; |
|
for (path = 0x80, pos = 0; path; path >>= 1, pos++) { |
|
conf_data = device->path[pos].conf_data; |
|
if (conf_data->gneq.record_selector == |
|
cuir->record_selector) |
|
return conf_data; |
|
} |
|
out: |
|
return device->path[pathmask_to_pos(lpum)].conf_data; |
|
} |
|
|
|
/* |
|
* This function determines the scope of a reconfiguration request by |
|
* analysing the path and device selection data provided in the CUIR request. |
|
* Returns a path mask containing CUIR affected paths for the give device. |
|
* |
|
* If the CUIR request does not contain the required information return the |
|
* path mask of the path the attention message for the CUIR request was reveived |
|
* on. |
|
*/ |
|
static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, |
|
struct dasd_cuir_message *cuir) |
|
{ |
|
struct dasd_conf_data *ref_conf_data; |
|
unsigned long bitmask = 0, mask = 0; |
|
struct dasd_conf_data *conf_data; |
|
unsigned int pos, path; |
|
char *ref_gneq, *gneq; |
|
char *ref_ned, *ned; |
|
int tbcpm = 0; |
|
|
|
/* if CUIR request does not specify the scope use the path |
|
the attention message was presented on */ |
|
if (!cuir->ned_map || |
|
!(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) |
|
return lpum; |
|
|
|
/* get reference conf data */ |
|
ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); |
|
/* reference ned is determined by ned_map field */ |
|
pos = 8 - ffs(cuir->ned_map); |
|
ref_ned = (char *)&ref_conf_data->neds[pos]; |
|
ref_gneq = (char *)&ref_conf_data->gneq; |
|
/* transfer 24 bit neq_map to mask */ |
|
mask = cuir->neq_map[2]; |
|
mask |= cuir->neq_map[1] << 8; |
|
mask |= cuir->neq_map[0] << 16; |
|
|
|
for (path = 0; path < 8; path++) { |
|
/* initialise data per path */ |
|
bitmask = mask; |
|
conf_data = device->path[path].conf_data; |
|
pos = 8 - ffs(cuir->ned_map); |
|
ned = (char *) &conf_data->neds[pos]; |
|
/* compare reference ned and per path ned */ |
|
if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) |
|
continue; |
|
gneq = (char *)&conf_data->gneq; |
|
/* compare reference gneq and per_path gneq under |
|
24 bit mask where mask bit 0 equals byte 7 of |
|
the gneq and mask bit 24 equals byte 31 */ |
|
while (bitmask) { |
|
pos = ffs(bitmask) - 1; |
|
if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) |
|
!= 0) |
|
break; |
|
clear_bit(pos, &bitmask); |
|
} |
|
if (bitmask) |
|
continue; |
|
/* device and path match the reference values |
|
add path to CUIR scope */ |
|
tbcpm |= 0x80 >> path; |
|
} |
|
return tbcpm; |
|
} |
|
|
|
static void dasd_eckd_cuir_notify_user(struct dasd_device *device, |
|
unsigned long paths, int action) |
|
{ |
|
int pos; |
|
|
|
while (paths) { |
|
/* get position of bit in mask */ |
|
pos = 8 - ffs(paths); |
|
/* get channel path descriptor from this position */ |
|
if (action == CUIR_QUIESCE) |
|
pr_warn("Service on the storage server caused path %x.%02x to go offline", |
|
device->path[pos].cssid, |
|
device->path[pos].chpid); |
|
else if (action == CUIR_RESUME) |
|
pr_info("Path %x.%02x is back online after service on the storage server", |
|
device->path[pos].cssid, |
|
device->path[pos].chpid); |
|
clear_bit(7 - pos, &paths); |
|
} |
|
} |
|
|
|
static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, |
|
struct dasd_cuir_message *cuir) |
|
{ |
|
unsigned long tbcpm; |
|
|
|
tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); |
|
/* nothing to do if path is not in use */ |
|
if (!(dasd_path_get_opm(device) & tbcpm)) |
|
return 0; |
|
if (!(dasd_path_get_opm(device) & ~tbcpm)) { |
|
/* no path would be left if the CUIR action is taken |
|
return error */ |
|
return -EINVAL; |
|
} |
|
/* remove device from operational path mask */ |
|
dasd_path_remove_opm(device, tbcpm); |
|
dasd_path_add_cuirpm(device, tbcpm); |
|
return tbcpm; |
|
} |
|
|
|
/* |
|
* walk through all devices and build a path mask to quiesce them |
|
* return an error if the last path to a device would be removed |
|
* |
|
* if only part of the devices are quiesced and an error |
|
* occurs no onlining necessary, the storage server will |
|
* notify the already set offline devices again |
|
*/ |
|
static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, |
|
struct dasd_cuir_message *cuir) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
struct alias_pav_group *pavgroup, *tempgroup; |
|
struct dasd_device *dev, *n; |
|
unsigned long paths = 0; |
|
unsigned long flags; |
|
int tbcpm; |
|
|
|
/* active devices */ |
|
list_for_each_entry_safe(dev, n, &private->lcu->active_devices, |
|
alias_list) { |
|
spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
|
tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); |
|
spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); |
|
if (tbcpm < 0) |
|
goto out_err; |
|
paths |= tbcpm; |
|
} |
|
/* inactive devices */ |
|
list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, |
|
alias_list) { |
|
spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
|
tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); |
|
spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); |
|
if (tbcpm < 0) |
|
goto out_err; |
|
paths |= tbcpm; |
|
} |
|
/* devices in PAV groups */ |
|
list_for_each_entry_safe(pavgroup, tempgroup, |
|
&private->lcu->grouplist, group) { |
|
list_for_each_entry_safe(dev, n, &pavgroup->baselist, |
|
alias_list) { |
|
spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
|
tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); |
|
spin_unlock_irqrestore( |
|
get_ccwdev_lock(dev->cdev), flags); |
|
if (tbcpm < 0) |
|
goto out_err; |
|
paths |= tbcpm; |
|
} |
|
list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, |
|
alias_list) { |
|
spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
|
tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); |
|
spin_unlock_irqrestore( |
|
get_ccwdev_lock(dev->cdev), flags); |
|
if (tbcpm < 0) |
|
goto out_err; |
|
paths |= tbcpm; |
|
} |
|
} |
|
/* notify user about all paths affected by CUIR action */ |
|
dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); |
|
return 0; |
|
out_err: |
|
return tbcpm; |
|
} |
|
|
|
static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, |
|
struct dasd_cuir_message *cuir) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
struct alias_pav_group *pavgroup, *tempgroup; |
|
struct dasd_device *dev, *n; |
|
unsigned long paths = 0; |
|
int tbcpm; |
|
|
|
/* |
|
* the path may have been added through a generic path event before |
|
* only trigger path verification if the path is not already in use |
|
*/ |
|
list_for_each_entry_safe(dev, n, |
|
&private->lcu->active_devices, |
|
alias_list) { |
|
tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
|
paths |= tbcpm; |
|
if (!(dasd_path_get_opm(dev) & tbcpm)) { |
|
dasd_path_add_tbvpm(dev, tbcpm); |
|
dasd_schedule_device_bh(dev); |
|
} |
|
} |
|
list_for_each_entry_safe(dev, n, |
|
&private->lcu->inactive_devices, |
|
alias_list) { |
|
tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
|
paths |= tbcpm; |
|
if (!(dasd_path_get_opm(dev) & tbcpm)) { |
|
dasd_path_add_tbvpm(dev, tbcpm); |
|
dasd_schedule_device_bh(dev); |
|
} |
|
} |
|
/* devices in PAV groups */ |
|
list_for_each_entry_safe(pavgroup, tempgroup, |
|
&private->lcu->grouplist, |
|
group) { |
|
list_for_each_entry_safe(dev, n, |
|
&pavgroup->baselist, |
|
alias_list) { |
|
tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
|
paths |= tbcpm; |
|
if (!(dasd_path_get_opm(dev) & tbcpm)) { |
|
dasd_path_add_tbvpm(dev, tbcpm); |
|
dasd_schedule_device_bh(dev); |
|
} |
|
} |
|
list_for_each_entry_safe(dev, n, |
|
&pavgroup->aliaslist, |
|
alias_list) { |
|
tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
|
paths |= tbcpm; |
|
if (!(dasd_path_get_opm(dev) & tbcpm)) { |
|
dasd_path_add_tbvpm(dev, tbcpm); |
|
dasd_schedule_device_bh(dev); |
|
} |
|
} |
|
} |
|
/* notify user about all paths affected by CUIR action */ |
|
dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); |
|
return 0; |
|
} |
|
|
|
static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, |
|
__u8 lpum) |
|
{ |
|
struct dasd_cuir_message *cuir = messages; |
|
int response; |
|
|
|
DBF_DEV_EVENT(DBF_WARNING, device, |
|
"CUIR request: %016llx %016llx %016llx %08x", |
|
((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], |
|
((u32 *)cuir)[3]); |
|
|
|
if (cuir->code == CUIR_QUIESCE) { |
|
/* quiesce */ |
|
if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) |
|
response = PSF_CUIR_LAST_PATH; |
|
else |
|
response = PSF_CUIR_COMPLETED; |
|
} else if (cuir->code == CUIR_RESUME) { |
|
/* resume */ |
|
dasd_eckd_cuir_resume(device, lpum, cuir); |
|
response = PSF_CUIR_COMPLETED; |
|
} else |
|
response = PSF_CUIR_NOT_SUPPORTED; |
|
|
|
dasd_eckd_psf_cuir_response(device, response, |
|
cuir->message_id, lpum); |
|
DBF_DEV_EVENT(DBF_WARNING, device, |
|
"CUIR response: %d on message ID %08x", response, |
|
cuir->message_id); |
|
/* to make sure there is no attention left schedule work again */ |
|
device->discipline->check_attention(device, lpum); |
|
} |
|
|
|
static void dasd_eckd_oos_resume(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
struct alias_pav_group *pavgroup, *tempgroup; |
|
struct dasd_device *dev, *n; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&private->lcu->lock, flags); |
|
list_for_each_entry_safe(dev, n, &private->lcu->active_devices, |
|
alias_list) { |
|
if (dev->stopped & DASD_STOPPED_NOSPC) |
|
dasd_generic_space_avail(dev); |
|
} |
|
list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, |
|
alias_list) { |
|
if (dev->stopped & DASD_STOPPED_NOSPC) |
|
dasd_generic_space_avail(dev); |
|
} |
|
/* devices in PAV groups */ |
|
list_for_each_entry_safe(pavgroup, tempgroup, |
|
&private->lcu->grouplist, |
|
group) { |
|
list_for_each_entry_safe(dev, n, &pavgroup->baselist, |
|
alias_list) { |
|
if (dev->stopped & DASD_STOPPED_NOSPC) |
|
dasd_generic_space_avail(dev); |
|
} |
|
list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, |
|
alias_list) { |
|
if (dev->stopped & DASD_STOPPED_NOSPC) |
|
dasd_generic_space_avail(dev); |
|
} |
|
} |
|
spin_unlock_irqrestore(&private->lcu->lock, flags); |
|
} |
|
|
|
static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages, |
|
__u8 lpum) |
|
{ |
|
struct dasd_oos_message *oos = messages; |
|
|
|
switch (oos->code) { |
|
case REPO_WARN: |
|
case POOL_WARN: |
|
dev_warn(&device->cdev->dev, |
|
"Extent pool usage has reached a critical value\n"); |
|
dasd_eckd_oos_resume(device); |
|
break; |
|
case REPO_EXHAUST: |
|
case POOL_EXHAUST: |
|
dev_warn(&device->cdev->dev, |
|
"Extent pool is exhausted\n"); |
|
break; |
|
case REPO_RELIEVE: |
|
case POOL_RELIEVE: |
|
dev_info(&device->cdev->dev, |
|
"Extent pool physical space constraint has been relieved\n"); |
|
break; |
|
} |
|
|
|
/* In any case, update related data */ |
|
dasd_eckd_read_ext_pool_info(device); |
|
|
|
/* to make sure there is no attention left schedule work again */ |
|
device->discipline->check_attention(device, lpum); |
|
} |
|
|
|
static void dasd_eckd_check_attention_work(struct work_struct *work) |
|
{ |
|
struct check_attention_work_data *data; |
|
struct dasd_rssd_messages *messages; |
|
struct dasd_device *device; |
|
int rc; |
|
|
|
data = container_of(work, struct check_attention_work_data, worker); |
|
device = data->device; |
|
messages = kzalloc(sizeof(*messages), GFP_KERNEL); |
|
if (!messages) { |
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
|
"Could not allocate attention message buffer"); |
|
goto out; |
|
} |
|
rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); |
|
if (rc) |
|
goto out; |
|
|
|
if (messages->length == ATTENTION_LENGTH_CUIR && |
|
messages->format == ATTENTION_FORMAT_CUIR) |
|
dasd_eckd_handle_cuir(device, messages, data->lpum); |
|
if (messages->length == ATTENTION_LENGTH_OOS && |
|
messages->format == ATTENTION_FORMAT_OOS) |
|
dasd_eckd_handle_oos(device, messages, data->lpum); |
|
|
|
out: |
|
dasd_put_device(device); |
|
kfree(messages); |
|
kfree(data); |
|
} |
|
|
|
static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) |
|
{ |
|
struct check_attention_work_data *data; |
|
|
|
data = kzalloc(sizeof(*data), GFP_ATOMIC); |
|
if (!data) |
|
return -ENOMEM; |
|
INIT_WORK(&data->worker, dasd_eckd_check_attention_work); |
|
dasd_get_device(device); |
|
data->device = device; |
|
data->lpum = lpum; |
|
schedule_work(&data->worker); |
|
return 0; |
|
} |
|
|
|
static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) |
|
{ |
|
if (~lpum & dasd_path_get_opm(device)) { |
|
dasd_path_add_nohpfpm(device, lpum); |
|
dasd_path_remove_opm(device, lpum); |
|
dev_err(&device->cdev->dev, |
|
"Channel path %02X lost HPF functionality and is disabled\n", |
|
lpum); |
|
return 1; |
|
} |
|
return 0; |
|
} |
|
|
|
static void dasd_eckd_disable_hpf_device(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
|
|
dev_err(&device->cdev->dev, |
|
"High Performance FICON disabled\n"); |
|
private->fcx_max_data = 0; |
|
} |
|
|
|
static int dasd_eckd_hpf_enabled(struct dasd_device *device) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
|
|
return private->fcx_max_data ? 1 : 0; |
|
} |
|
|
|
static void dasd_eckd_handle_hpf_error(struct dasd_device *device, |
|
struct irb *irb) |
|
{ |
|
struct dasd_eckd_private *private = device->private; |
|
|
|
if (!private->fcx_max_data) { |
|
/* sanity check for no HPF, the error makes no sense */ |
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
|
"Trying to disable HPF for a non HPF device"); |
|
return; |
|
} |
|
if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { |
|
dasd_eckd_disable_hpf_device(device); |
|
} else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { |
|
if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) |
|
return; |
|
dasd_eckd_disable_hpf_device(device); |
|
dasd_path_set_tbvpm(device, |
|
dasd_path_get_hpfpm(device)); |
|
} |
|
/* |
|
* prevent that any new I/O ist started on the device and schedule a |
|
* requeue of existing requests |
|
*/ |
|
dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); |
|
dasd_schedule_requeue(device); |
|
} |
|
|
|
/* |
|
* Initialize block layer request queue. |
|
*/ |
|
static void dasd_eckd_setup_blk_queue(struct dasd_block *block) |
|
{ |
|
unsigned int logical_block_size = block->bp_block; |
|
struct request_queue *q = block->request_queue; |
|
struct dasd_device *device = block->base; |
|
int max; |
|
|
|
if (device->features & DASD_FEATURE_USERAW) { |
|
/* |
|
* the max_blocks value for raw_track access is 256 |
|
* it is higher than the native ECKD value because we |
|
* only need one ccw per track |
|
* so the max_hw_sectors are |
|
* 2048 x 512B = 1024kB = 16 tracks |
|
*/ |
|
max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; |
|
} else { |
|
max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift; |
|
} |
|
blk_queue_flag_set(QUEUE_FLAG_NONROT, q); |
|
q->limits.max_dev_sectors = max; |
|
blk_queue_logical_block_size(q, logical_block_size); |
|
blk_queue_max_hw_sectors(q, max); |
|
blk_queue_max_segments(q, USHRT_MAX); |
|
/* With page sized segments each segment can be translated into one idaw/tidaw */ |
|
blk_queue_max_segment_size(q, PAGE_SIZE); |
|
blk_queue_segment_boundary(q, PAGE_SIZE - 1); |
|
} |
|
|
|
static struct ccw_driver dasd_eckd_driver = { |
|
.driver = { |
|
.name = "dasd-eckd", |
|
.owner = THIS_MODULE, |
|
.dev_groups = dasd_dev_groups, |
|
}, |
|
.ids = dasd_eckd_ids, |
|
.probe = dasd_eckd_probe, |
|
.remove = dasd_generic_remove, |
|
.set_offline = dasd_generic_set_offline, |
|
.set_online = dasd_eckd_set_online, |
|
.notify = dasd_generic_notify, |
|
.path_event = dasd_generic_path_event, |
|
.shutdown = dasd_generic_shutdown, |
|
.uc_handler = dasd_generic_uc_handler, |
|
.int_class = IRQIO_DAS, |
|
}; |
|
|
|
static struct dasd_discipline dasd_eckd_discipline = { |
|
.owner = THIS_MODULE, |
|
.name = "ECKD", |
|
.ebcname = "ECKD", |
|
.check_device = dasd_eckd_check_characteristics, |
|
.uncheck_device = dasd_eckd_uncheck_device, |
|
.do_analysis = dasd_eckd_do_analysis, |
|
.pe_handler = dasd_eckd_pe_handler, |
|
.basic_to_ready = dasd_eckd_basic_to_ready, |
|
.online_to_ready = dasd_eckd_online_to_ready, |
|
.basic_to_known = dasd_eckd_basic_to_known, |
|
.setup_blk_queue = dasd_eckd_setup_blk_queue, |
|
.fill_geometry = dasd_eckd_fill_geometry, |
|
.start_IO = dasd_start_IO, |
|
.term_IO = dasd_term_IO, |
|
.handle_terminated_request = dasd_eckd_handle_terminated_request, |
|
.format_device = dasd_eckd_format_device, |
|
.check_device_format = dasd_eckd_check_device_format, |
|
.erp_action = dasd_eckd_erp_action, |
|
.erp_postaction = dasd_eckd_erp_postaction, |
|
.check_for_device_change = dasd_eckd_check_for_device_change, |
|
.build_cp = dasd_eckd_build_alias_cp, |
|
.free_cp = dasd_eckd_free_alias_cp, |
|
.dump_sense = dasd_eckd_dump_sense, |
|
.dump_sense_dbf = dasd_eckd_dump_sense_dbf, |
|
.fill_info = dasd_eckd_fill_info, |
|
.ioctl = dasd_eckd_ioctl, |
|
.reload = dasd_eckd_reload_device, |
|
.get_uid = dasd_eckd_get_uid, |
|
.kick_validate = dasd_eckd_kick_validate_server, |
|
.check_attention = dasd_eckd_check_attention, |
|
.host_access_count = dasd_eckd_host_access_count, |
|
.hosts_print = dasd_hosts_print, |
|
.handle_hpf_error = dasd_eckd_handle_hpf_error, |
|
.disable_hpf = dasd_eckd_disable_hpf_device, |
|
.hpf_enabled = dasd_eckd_hpf_enabled, |
|
.reset_path = dasd_eckd_reset_path, |
|
.is_ese = dasd_eckd_is_ese, |
|
.space_allocated = dasd_eckd_space_allocated, |
|
.space_configured = dasd_eckd_space_configured, |
|
.logical_capacity = dasd_eckd_logical_capacity, |
|
.release_space = dasd_eckd_release_space, |
|
.ext_pool_id = dasd_eckd_ext_pool_id, |
|
.ext_size = dasd_eckd_ext_size, |
|
.ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, |
|
.ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, |
|
.ext_pool_oos = dasd_eckd_ext_pool_oos, |
|
.ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, |
|
.ese_format = dasd_eckd_ese_format, |
|
.ese_read = dasd_eckd_ese_read, |
|
}; |
|
|
|
static int __init |
|
dasd_eckd_init(void) |
|
{ |
|
int ret; |
|
|
|
ASCEBC(dasd_eckd_discipline.ebcname, 4); |
|
dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), |
|
GFP_KERNEL | GFP_DMA); |
|
if (!dasd_reserve_req) |
|
return -ENOMEM; |
|
dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req), |
|
GFP_KERNEL | GFP_DMA); |
|
if (!dasd_vol_info_req) |
|
return -ENOMEM; |
|
pe_handler_worker = kmalloc(sizeof(*pe_handler_worker), |
|
GFP_KERNEL | GFP_DMA); |
|
if (!pe_handler_worker) { |
|
kfree(dasd_reserve_req); |
|
kfree(dasd_vol_info_req); |
|
return -ENOMEM; |
|
} |
|
rawpadpage = (void *)__get_free_page(GFP_KERNEL); |
|
if (!rawpadpage) { |
|
kfree(pe_handler_worker); |
|
kfree(dasd_reserve_req); |
|
kfree(dasd_vol_info_req); |
|
return -ENOMEM; |
|
} |
|
ret = ccw_driver_register(&dasd_eckd_driver); |
|
if (!ret) |
|
wait_for_device_probe(); |
|
else { |
|
kfree(pe_handler_worker); |
|
kfree(dasd_reserve_req); |
|
kfree(dasd_vol_info_req); |
|
free_page((unsigned long)rawpadpage); |
|
} |
|
return ret; |
|
} |
|
|
|
static void __exit |
|
dasd_eckd_cleanup(void) |
|
{ |
|
ccw_driver_unregister(&dasd_eckd_driver); |
|
kfree(pe_handler_worker); |
|
kfree(dasd_reserve_req); |
|
free_page((unsigned long)rawpadpage); |
|
} |
|
|
|
module_init(dasd_eckd_init); |
|
module_exit(dasd_eckd_cleanup);
|
|
|