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1557 lines
36 KiB
1557 lines
36 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
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* S/390 common I/O routines -- channel subsystem call |
|
* |
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* Copyright IBM Corp. 1999,2012 |
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* Author(s): Ingo Adlung ([email protected]) |
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* Cornelia Huck ([email protected]) |
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* Arnd Bergmann ([email protected]) |
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*/ |
|
|
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#define KMSG_COMPONENT "cio" |
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
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|
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/init.h> |
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#include <linux/device.h> |
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#include <linux/mutex.h> |
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#include <linux/pci.h> |
|
|
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#include <asm/cio.h> |
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#include <asm/chpid.h> |
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#include <asm/chsc.h> |
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#include <asm/crw.h> |
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#include <asm/isc.h> |
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#include <asm/ebcdic.h> |
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#include <asm/ap.h> |
|
|
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#include "css.h" |
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#include "cio.h" |
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#include "cio_debug.h" |
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#include "ioasm.h" |
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#include "chp.h" |
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#include "chsc.h" |
|
|
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static void *sei_page; |
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static void *chsc_page; |
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static DEFINE_SPINLOCK(chsc_page_lock); |
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|
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#define SEI_VF_FLA 0xc0 /* VF flag for Full Link Address */ |
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#define SEI_RS_CHPID 0x4 /* 4 in RS field indicates CHPID */ |
|
|
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/** |
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* chsc_error_from_response() - convert a chsc response to an error |
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* @response: chsc response code |
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* |
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* Returns an appropriate Linux error code for @response. |
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*/ |
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int chsc_error_from_response(int response) |
|
{ |
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switch (response) { |
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case 0x0001: |
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return 0; |
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case 0x0002: |
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case 0x0003: |
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case 0x0006: |
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case 0x0007: |
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case 0x0008: |
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case 0x000a: |
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case 0x0104: |
|
return -EINVAL; |
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case 0x0004: |
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case 0x0106: /* "Wrong Channel Parm" for the op 0x003d */ |
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return -EOPNOTSUPP; |
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case 0x000b: |
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case 0x0107: /* "Channel busy" for the op 0x003d */ |
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return -EBUSY; |
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case 0x0100: |
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case 0x0102: |
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return -ENOMEM; |
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case 0x0108: /* "HW limit exceeded" for the op 0x003d */ |
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return -EUSERS; |
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default: |
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return -EIO; |
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} |
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} |
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EXPORT_SYMBOL_GPL(chsc_error_from_response); |
|
|
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struct chsc_ssd_area { |
|
struct chsc_header request; |
|
u16 :10; |
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u16 ssid:2; |
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u16 :4; |
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u16 f_sch; /* first subchannel */ |
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u16 :16; |
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u16 l_sch; /* last subchannel */ |
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u32 :32; |
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struct chsc_header response; |
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u32 :32; |
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u8 sch_valid : 1; |
|
u8 dev_valid : 1; |
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u8 st : 3; /* subchannel type */ |
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u8 zeroes : 3; |
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u8 unit_addr; /* unit address */ |
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u16 devno; /* device number */ |
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u8 path_mask; |
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u8 fla_valid_mask; |
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u16 sch; /* subchannel */ |
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u8 chpid[8]; /* chpids 0-7 */ |
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u16 fla[8]; /* full link addresses 0-7 */ |
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} __packed __aligned(PAGE_SIZE); |
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|
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int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd) |
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{ |
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struct chsc_ssd_area *ssd_area; |
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unsigned long flags; |
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int ccode; |
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int ret; |
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int i; |
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int mask; |
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|
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spin_lock_irqsave(&chsc_page_lock, flags); |
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memset(chsc_page, 0, PAGE_SIZE); |
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ssd_area = chsc_page; |
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ssd_area->request.length = 0x0010; |
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ssd_area->request.code = 0x0004; |
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ssd_area->ssid = schid.ssid; |
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ssd_area->f_sch = schid.sch_no; |
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ssd_area->l_sch = schid.sch_no; |
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|
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ccode = chsc(ssd_area); |
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/* Check response. */ |
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if (ccode > 0) { |
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ret = (ccode == 3) ? -ENODEV : -EBUSY; |
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goto out; |
|
} |
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ret = chsc_error_from_response(ssd_area->response.code); |
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if (ret != 0) { |
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CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n", |
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schid.ssid, schid.sch_no, |
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ssd_area->response.code); |
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goto out; |
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} |
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if (!ssd_area->sch_valid) { |
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ret = -ENODEV; |
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goto out; |
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} |
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/* Copy data */ |
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ret = 0; |
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memset(ssd, 0, sizeof(struct chsc_ssd_info)); |
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if ((ssd_area->st != SUBCHANNEL_TYPE_IO) && |
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(ssd_area->st != SUBCHANNEL_TYPE_MSG)) |
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goto out; |
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ssd->path_mask = ssd_area->path_mask; |
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ssd->fla_valid_mask = ssd_area->fla_valid_mask; |
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for (i = 0; i < 8; i++) { |
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mask = 0x80 >> i; |
|
if (ssd_area->path_mask & mask) { |
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chp_id_init(&ssd->chpid[i]); |
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ssd->chpid[i].id = ssd_area->chpid[i]; |
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} |
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if (ssd_area->fla_valid_mask & mask) |
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ssd->fla[i] = ssd_area->fla[i]; |
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} |
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out: |
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spin_unlock_irqrestore(&chsc_page_lock, flags); |
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return ret; |
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} |
|
|
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/** |
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* chsc_ssqd() - store subchannel QDIO data (SSQD) |
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* @schid: id of the subchannel on which SSQD is performed |
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* @ssqd: request and response block for SSQD |
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* |
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* Returns 0 on success. |
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*/ |
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int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd) |
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{ |
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memset(ssqd, 0, sizeof(*ssqd)); |
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ssqd->request.length = 0x0010; |
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ssqd->request.code = 0x0024; |
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ssqd->first_sch = schid.sch_no; |
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ssqd->last_sch = schid.sch_no; |
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ssqd->ssid = schid.ssid; |
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|
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if (chsc(ssqd)) |
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return -EIO; |
|
|
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return chsc_error_from_response(ssqd->response.code); |
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} |
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EXPORT_SYMBOL_GPL(chsc_ssqd); |
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|
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/** |
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* chsc_sadc() - set adapter device controls (SADC) |
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* @schid: id of the subchannel on which SADC is performed |
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* @scssc: request and response block for SADC |
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* @summary_indicator_addr: summary indicator address |
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* @subchannel_indicator_addr: subchannel indicator address |
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* @isc: Interruption Subclass for this subchannel |
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* |
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* Returns 0 on success. |
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*/ |
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int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc, |
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u64 summary_indicator_addr, u64 subchannel_indicator_addr, u8 isc) |
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{ |
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memset(scssc, 0, sizeof(*scssc)); |
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scssc->request.length = 0x0fe0; |
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scssc->request.code = 0x0021; |
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scssc->operation_code = 0; |
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|
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scssc->summary_indicator_addr = summary_indicator_addr; |
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scssc->subchannel_indicator_addr = subchannel_indicator_addr; |
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|
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scssc->ks = PAGE_DEFAULT_KEY >> 4; |
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scssc->kc = PAGE_DEFAULT_KEY >> 4; |
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scssc->isc = isc; |
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scssc->schid = schid; |
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|
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/* enable the time delay disablement facility */ |
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if (css_general_characteristics.aif_tdd) |
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scssc->word_with_d_bit = 0x10000000; |
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|
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if (chsc(scssc)) |
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return -EIO; |
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|
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return chsc_error_from_response(scssc->response.code); |
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} |
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EXPORT_SYMBOL_GPL(chsc_sadc); |
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|
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static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data) |
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{ |
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spin_lock_irq(sch->lock); |
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if (sch->driver && sch->driver->chp_event) |
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if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0) |
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goto out_unreg; |
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spin_unlock_irq(sch->lock); |
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return 0; |
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|
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out_unreg: |
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sch->lpm = 0; |
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spin_unlock_irq(sch->lock); |
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css_schedule_eval(sch->schid); |
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return 0; |
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} |
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|
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void chsc_chp_offline(struct chp_id chpid) |
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{ |
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struct channel_path *chp = chpid_to_chp(chpid); |
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struct chp_link link; |
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char dbf_txt[15]; |
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|
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sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id); |
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CIO_TRACE_EVENT(2, dbf_txt); |
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|
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if (chp_get_status(chpid) <= 0) |
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return; |
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memset(&link, 0, sizeof(struct chp_link)); |
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link.chpid = chpid; |
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/* Wait until previous actions have settled. */ |
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css_wait_for_slow_path(); |
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mutex_lock(&chp->lock); |
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chp_update_desc(chp); |
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mutex_unlock(&chp->lock); |
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for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link); |
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} |
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|
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static int __s390_process_res_acc(struct subchannel *sch, void *data) |
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{ |
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spin_lock_irq(sch->lock); |
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if (sch->driver && sch->driver->chp_event) |
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sch->driver->chp_event(sch, data, CHP_ONLINE); |
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spin_unlock_irq(sch->lock); |
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|
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return 0; |
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} |
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|
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static void s390_process_res_acc(struct chp_link *link) |
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{ |
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char dbf_txt[15]; |
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|
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sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid, |
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link->chpid.id); |
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CIO_TRACE_EVENT( 2, dbf_txt); |
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if (link->fla != 0) { |
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sprintf(dbf_txt, "fla%x", link->fla); |
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CIO_TRACE_EVENT( 2, dbf_txt); |
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} |
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/* Wait until previous actions have settled. */ |
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css_wait_for_slow_path(); |
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/* |
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* I/O resources may have become accessible. |
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* Scan through all subchannels that may be concerned and |
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* do a validation on those. |
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* The more information we have (info), the less scanning |
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* will we have to do. |
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*/ |
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for_each_subchannel_staged(__s390_process_res_acc, NULL, link); |
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css_schedule_reprobe(); |
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} |
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static int process_fces_event(struct subchannel *sch, void *data) |
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{ |
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spin_lock_irq(sch->lock); |
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if (sch->driver && sch->driver->chp_event) |
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sch->driver->chp_event(sch, data, CHP_FCES_EVENT); |
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spin_unlock_irq(sch->lock); |
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return 0; |
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} |
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struct chsc_sei_nt0_area { |
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u8 flags; |
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u8 vf; /* validity flags */ |
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u8 rs; /* reporting source */ |
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u8 cc; /* content code */ |
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u16 fla; /* full link address */ |
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u16 rsid; /* reporting source id */ |
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u32 reserved1; |
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u32 reserved2; |
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/* ccdf has to be big enough for a link-incident record */ |
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u8 ccdf[PAGE_SIZE - 24 - 16]; /* content-code dependent field */ |
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} __packed; |
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|
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struct chsc_sei_nt2_area { |
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u8 flags; /* p and v bit */ |
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u8 reserved1; |
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u8 reserved2; |
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u8 cc; /* content code */ |
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u32 reserved3[13]; |
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u8 ccdf[PAGE_SIZE - 24 - 56]; /* content-code dependent field */ |
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} __packed; |
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|
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#define CHSC_SEI_NT0 (1ULL << 63) |
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#define CHSC_SEI_NT2 (1ULL << 61) |
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|
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struct chsc_sei { |
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struct chsc_header request; |
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u32 reserved1; |
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u64 ntsm; /* notification type mask */ |
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struct chsc_header response; |
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u32 :24; |
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u8 nt; |
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union { |
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struct chsc_sei_nt0_area nt0_area; |
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struct chsc_sei_nt2_area nt2_area; |
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u8 nt_area[PAGE_SIZE - 24]; |
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} u; |
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} __packed __aligned(PAGE_SIZE); |
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|
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/* |
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* Link Incident Record as defined in SA22-7202, "ESCON I/O Interface" |
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*/ |
|
|
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#define LIR_IQ_CLASS_INFO 0 |
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#define LIR_IQ_CLASS_DEGRADED 1 |
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#define LIR_IQ_CLASS_NOT_OPERATIONAL 2 |
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|
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struct lir { |
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struct { |
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u32 null:1; |
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u32 reserved:3; |
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u32 class:2; |
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u32 reserved2:2; |
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} __packed iq; |
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u32 ic:8; |
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u32 reserved:16; |
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struct node_descriptor incident_node; |
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struct node_descriptor attached_node; |
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u8 reserved2[32]; |
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} __packed; |
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|
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#define PARAMS_LEN 10 /* PARAMS=xx,xxxxxx */ |
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#define NODEID_LEN 35 /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */ |
|
|
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/* Copy EBCIDC text, convert to ASCII and optionally add delimiter. */ |
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static char *store_ebcdic(char *dest, const char *src, unsigned long len, |
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char delim) |
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{ |
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memcpy(dest, src, len); |
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EBCASC(dest, len); |
|
|
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if (delim) |
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dest[len++] = delim; |
|
|
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return dest + len; |
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} |
|
|
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static void chsc_link_from_sei(struct chp_link *link, |
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struct chsc_sei_nt0_area *sei_area) |
|
{ |
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if ((sei_area->vf & SEI_VF_FLA) != 0) { |
|
link->fla = sei_area->fla; |
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link->fla_mask = ((sei_area->vf & SEI_VF_FLA) == SEI_VF_FLA) ? |
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0xffff : 0xff00; |
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} |
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} |
|
|
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/* Format node ID and parameters for output in LIR log message. */ |
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static void format_node_data(char *params, char *id, struct node_descriptor *nd) |
|
{ |
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memset(params, 0, PARAMS_LEN); |
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memset(id, 0, NODEID_LEN); |
|
|
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if (nd->validity != ND_VALIDITY_VALID) { |
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strncpy(params, "n/a", PARAMS_LEN - 1); |
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strncpy(id, "n/a", NODEID_LEN - 1); |
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return; |
|
} |
|
|
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/* PARAMS=xx,xxxxxx */ |
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snprintf(params, PARAMS_LEN, "%02x,%06x", nd->byte0, nd->params); |
|
/* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */ |
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id = store_ebcdic(id, nd->type, sizeof(nd->type), '/'); |
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id = store_ebcdic(id, nd->model, sizeof(nd->model), ','); |
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id = store_ebcdic(id, nd->manufacturer, sizeof(nd->manufacturer), '.'); |
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id = store_ebcdic(id, nd->plant, sizeof(nd->plant), 0); |
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id = store_ebcdic(id, nd->seq, sizeof(nd->seq), ','); |
|
sprintf(id, "%04X", nd->tag); |
|
} |
|
|
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static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area) |
|
{ |
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struct lir *lir = (struct lir *) &sei_area->ccdf; |
|
char iuparams[PARAMS_LEN], iunodeid[NODEID_LEN], auparams[PARAMS_LEN], |
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aunodeid[NODEID_LEN]; |
|
|
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CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x, iq=%02x)\n", |
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sei_area->rs, sei_area->rsid, sei_area->ccdf[0]); |
|
|
|
/* Ignore NULL Link Incident Records. */ |
|
if (lir->iq.null) |
|
return; |
|
|
|
/* Inform user that a link requires maintenance actions because it has |
|
* become degraded or not operational. Note that this log message is |
|
* the primary intention behind a Link Incident Record. */ |
|
|
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format_node_data(iuparams, iunodeid, &lir->incident_node); |
|
format_node_data(auparams, aunodeid, &lir->attached_node); |
|
|
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switch (lir->iq.class) { |
|
case LIR_IQ_CLASS_DEGRADED: |
|
pr_warn("Link degraded: RS=%02x RSID=%04x IC=%02x " |
|
"IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n", |
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sei_area->rs, sei_area->rsid, lir->ic, iuparams, |
|
iunodeid, auparams, aunodeid); |
|
break; |
|
case LIR_IQ_CLASS_NOT_OPERATIONAL: |
|
pr_err("Link stopped: RS=%02x RSID=%04x IC=%02x " |
|
"IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n", |
|
sei_area->rs, sei_area->rsid, lir->ic, iuparams, |
|
iunodeid, auparams, aunodeid); |
|
break; |
|
default: |
|
break; |
|
} |
|
} |
|
|
|
static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area) |
|
{ |
|
struct channel_path *chp; |
|
struct chp_link link; |
|
struct chp_id chpid; |
|
int status; |
|
|
|
CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, " |
|
"rs_id=%04x)\n", sei_area->rs, sei_area->rsid); |
|
if (sei_area->rs != 4) |
|
return; |
|
chp_id_init(&chpid); |
|
chpid.id = sei_area->rsid; |
|
/* allocate a new channel path structure, if needed */ |
|
status = chp_get_status(chpid); |
|
if (!status) |
|
return; |
|
|
|
if (status < 0) { |
|
chp_new(chpid); |
|
} else { |
|
chp = chpid_to_chp(chpid); |
|
mutex_lock(&chp->lock); |
|
chp_update_desc(chp); |
|
mutex_unlock(&chp->lock); |
|
} |
|
memset(&link, 0, sizeof(struct chp_link)); |
|
link.chpid = chpid; |
|
chsc_link_from_sei(&link, sei_area); |
|
s390_process_res_acc(&link); |
|
} |
|
|
|
static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area) |
|
{ |
|
struct channel_path *chp; |
|
struct chp_id chpid; |
|
u8 *data; |
|
int num; |
|
|
|
CIO_CRW_EVENT(4, "chsc: channel path availability information\n"); |
|
if (sei_area->rs != 0) |
|
return; |
|
data = sei_area->ccdf; |
|
chp_id_init(&chpid); |
|
for (num = 0; num <= __MAX_CHPID; num++) { |
|
if (!chp_test_bit(data, num)) |
|
continue; |
|
chpid.id = num; |
|
|
|
CIO_CRW_EVENT(4, "Update information for channel path " |
|
"%x.%02x\n", chpid.cssid, chpid.id); |
|
chp = chpid_to_chp(chpid); |
|
if (!chp) { |
|
chp_new(chpid); |
|
continue; |
|
} |
|
mutex_lock(&chp->lock); |
|
chp_update_desc(chp); |
|
mutex_unlock(&chp->lock); |
|
} |
|
} |
|
|
|
struct chp_config_data { |
|
u8 map[32]; |
|
u8 op; |
|
u8 pc; |
|
}; |
|
|
|
static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area) |
|
{ |
|
struct chp_config_data *data; |
|
struct chp_id chpid; |
|
int num; |
|
char *events[3] = {"configure", "deconfigure", "cancel deconfigure"}; |
|
|
|
CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n"); |
|
if (sei_area->rs != 0) |
|
return; |
|
data = (struct chp_config_data *) &(sei_area->ccdf); |
|
chp_id_init(&chpid); |
|
for (num = 0; num <= __MAX_CHPID; num++) { |
|
if (!chp_test_bit(data->map, num)) |
|
continue; |
|
chpid.id = num; |
|
pr_notice("Processing %s for channel path %x.%02x\n", |
|
events[data->op], chpid.cssid, chpid.id); |
|
switch (data->op) { |
|
case 0: |
|
chp_cfg_schedule(chpid, 1); |
|
break; |
|
case 1: |
|
chp_cfg_schedule(chpid, 0); |
|
break; |
|
case 2: |
|
chp_cfg_cancel_deconfigure(chpid); |
|
break; |
|
} |
|
} |
|
} |
|
|
|
static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area) |
|
{ |
|
int ret; |
|
|
|
CIO_CRW_EVENT(4, "chsc: scm change notification\n"); |
|
if (sei_area->rs != 7) |
|
return; |
|
|
|
ret = scm_update_information(); |
|
if (ret) |
|
CIO_CRW_EVENT(0, "chsc: updating change notification" |
|
" failed (rc=%d).\n", ret); |
|
} |
|
|
|
static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area) |
|
{ |
|
int ret; |
|
|
|
CIO_CRW_EVENT(4, "chsc: scm available information\n"); |
|
if (sei_area->rs != 7) |
|
return; |
|
|
|
ret = scm_process_availability_information(); |
|
if (ret) |
|
CIO_CRW_EVENT(0, "chsc: process availability information" |
|
" failed (rc=%d).\n", ret); |
|
} |
|
|
|
static void chsc_process_sei_ap_cfg_chg(struct chsc_sei_nt0_area *sei_area) |
|
{ |
|
CIO_CRW_EVENT(3, "chsc: ap config changed\n"); |
|
if (sei_area->rs != 5) |
|
return; |
|
|
|
ap_bus_cfg_chg(); |
|
} |
|
|
|
static void chsc_process_sei_fces_event(struct chsc_sei_nt0_area *sei_area) |
|
{ |
|
struct chp_link link; |
|
struct chp_id chpid; |
|
struct channel_path *chp; |
|
|
|
CIO_CRW_EVENT(4, |
|
"chsc: FCES status notification (rs=%02x, rs_id=%04x, FCES-status=%x)\n", |
|
sei_area->rs, sei_area->rsid, sei_area->ccdf[0]); |
|
|
|
if (sei_area->rs != SEI_RS_CHPID) |
|
return; |
|
chp_id_init(&chpid); |
|
chpid.id = sei_area->rsid; |
|
|
|
/* Ignore the event on unknown/invalid chp */ |
|
chp = chpid_to_chp(chpid); |
|
if (!chp) |
|
return; |
|
|
|
memset(&link, 0, sizeof(struct chp_link)); |
|
link.chpid = chpid; |
|
chsc_link_from_sei(&link, sei_area); |
|
|
|
for_each_subchannel_staged(process_fces_event, NULL, &link); |
|
} |
|
|
|
static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area) |
|
{ |
|
switch (sei_area->cc) { |
|
case 1: |
|
zpci_event_error(sei_area->ccdf); |
|
break; |
|
case 2: |
|
zpci_event_availability(sei_area->ccdf); |
|
break; |
|
default: |
|
CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n", |
|
sei_area->cc); |
|
break; |
|
} |
|
} |
|
|
|
static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area) |
|
{ |
|
/* which kind of information was stored? */ |
|
switch (sei_area->cc) { |
|
case 1: /* link incident*/ |
|
chsc_process_sei_link_incident(sei_area); |
|
break; |
|
case 2: /* i/o resource accessibility */ |
|
chsc_process_sei_res_acc(sei_area); |
|
break; |
|
case 3: /* ap config changed */ |
|
chsc_process_sei_ap_cfg_chg(sei_area); |
|
break; |
|
case 7: /* channel-path-availability information */ |
|
chsc_process_sei_chp_avail(sei_area); |
|
break; |
|
case 8: /* channel-path-configuration notification */ |
|
chsc_process_sei_chp_config(sei_area); |
|
break; |
|
case 12: /* scm change notification */ |
|
chsc_process_sei_scm_change(sei_area); |
|
break; |
|
case 14: /* scm available notification */ |
|
chsc_process_sei_scm_avail(sei_area); |
|
break; |
|
case 15: /* FCES event notification */ |
|
chsc_process_sei_fces_event(sei_area); |
|
break; |
|
default: /* other stuff */ |
|
CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n", |
|
sei_area->cc); |
|
break; |
|
} |
|
|
|
/* Check if we might have lost some information. */ |
|
if (sei_area->flags & 0x40) { |
|
CIO_CRW_EVENT(2, "chsc: event overflow\n"); |
|
css_schedule_eval_all(); |
|
} |
|
} |
|
|
|
static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm) |
|
{ |
|
static int ntsm_unsupported; |
|
|
|
while (true) { |
|
memset(sei, 0, sizeof(*sei)); |
|
sei->request.length = 0x0010; |
|
sei->request.code = 0x000e; |
|
if (!ntsm_unsupported) |
|
sei->ntsm = ntsm; |
|
|
|
if (chsc(sei)) |
|
break; |
|
|
|
if (sei->response.code != 0x0001) { |
|
CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x, ntsm=%llx)\n", |
|
sei->response.code, sei->ntsm); |
|
|
|
if (sei->response.code == 3 && sei->ntsm) { |
|
/* Fallback for old firmware. */ |
|
ntsm_unsupported = 1; |
|
continue; |
|
} |
|
break; |
|
} |
|
|
|
CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt); |
|
switch (sei->nt) { |
|
case 0: |
|
chsc_process_sei_nt0(&sei->u.nt0_area); |
|
break; |
|
case 2: |
|
chsc_process_sei_nt2(&sei->u.nt2_area); |
|
break; |
|
default: |
|
CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt); |
|
break; |
|
} |
|
|
|
if (!(sei->u.nt0_area.flags & 0x80)) |
|
break; |
|
} |
|
} |
|
|
|
/* |
|
* Handle channel subsystem related CRWs. |
|
* Use store event information to find out what's going on. |
|
* |
|
* Note: Access to sei_page is serialized through machine check handler |
|
* thread, so no need for locking. |
|
*/ |
|
static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow) |
|
{ |
|
struct chsc_sei *sei = sei_page; |
|
|
|
if (overflow) { |
|
css_schedule_eval_all(); |
|
return; |
|
} |
|
CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, " |
|
"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", |
|
crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc, |
|
crw0->erc, crw0->rsid); |
|
|
|
CIO_TRACE_EVENT(2, "prcss"); |
|
chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2); |
|
} |
|
|
|
void chsc_chp_online(struct chp_id chpid) |
|
{ |
|
struct channel_path *chp = chpid_to_chp(chpid); |
|
struct chp_link link; |
|
char dbf_txt[15]; |
|
|
|
sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); |
|
CIO_TRACE_EVENT(2, dbf_txt); |
|
|
|
if (chp_get_status(chpid) != 0) { |
|
memset(&link, 0, sizeof(struct chp_link)); |
|
link.chpid = chpid; |
|
/* Wait until previous actions have settled. */ |
|
css_wait_for_slow_path(); |
|
|
|
mutex_lock(&chp->lock); |
|
chp_update_desc(chp); |
|
mutex_unlock(&chp->lock); |
|
|
|
for_each_subchannel_staged(__s390_process_res_acc, NULL, |
|
&link); |
|
css_schedule_reprobe(); |
|
} |
|
} |
|
|
|
static void __s390_subchannel_vary_chpid(struct subchannel *sch, |
|
struct chp_id chpid, int on) |
|
{ |
|
unsigned long flags; |
|
struct chp_link link; |
|
|
|
memset(&link, 0, sizeof(struct chp_link)); |
|
link.chpid = chpid; |
|
spin_lock_irqsave(sch->lock, flags); |
|
if (sch->driver && sch->driver->chp_event) |
|
sch->driver->chp_event(sch, &link, |
|
on ? CHP_VARY_ON : CHP_VARY_OFF); |
|
spin_unlock_irqrestore(sch->lock, flags); |
|
} |
|
|
|
static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data) |
|
{ |
|
struct chp_id *chpid = data; |
|
|
|
__s390_subchannel_vary_chpid(sch, *chpid, 0); |
|
return 0; |
|
} |
|
|
|
static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data) |
|
{ |
|
struct chp_id *chpid = data; |
|
|
|
__s390_subchannel_vary_chpid(sch, *chpid, 1); |
|
return 0; |
|
} |
|
|
|
/** |
|
* chsc_chp_vary - propagate channel-path vary operation to subchannels |
|
* @chpid: channl-path ID |
|
* @on: non-zero for vary online, zero for vary offline |
|
*/ |
|
int chsc_chp_vary(struct chp_id chpid, int on) |
|
{ |
|
struct channel_path *chp = chpid_to_chp(chpid); |
|
|
|
/* Wait until previous actions have settled. */ |
|
css_wait_for_slow_path(); |
|
/* |
|
* Redo PathVerification on the devices the chpid connects to |
|
*/ |
|
if (on) { |
|
/* Try to update the channel path description. */ |
|
chp_update_desc(chp); |
|
for_each_subchannel_staged(s390_subchannel_vary_chpid_on, |
|
NULL, &chpid); |
|
css_schedule_reprobe(); |
|
} else |
|
for_each_subchannel_staged(s390_subchannel_vary_chpid_off, |
|
NULL, &chpid); |
|
|
|
return 0; |
|
} |
|
|
|
static void |
|
chsc_remove_cmg_attr(struct channel_subsystem *css) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i <= __MAX_CHPID; i++) { |
|
if (!css->chps[i]) |
|
continue; |
|
chp_remove_cmg_attr(css->chps[i]); |
|
} |
|
} |
|
|
|
static int |
|
chsc_add_cmg_attr(struct channel_subsystem *css) |
|
{ |
|
int i, ret; |
|
|
|
ret = 0; |
|
for (i = 0; i <= __MAX_CHPID; i++) { |
|
if (!css->chps[i]) |
|
continue; |
|
ret = chp_add_cmg_attr(css->chps[i]); |
|
if (ret) |
|
goto cleanup; |
|
} |
|
return ret; |
|
cleanup: |
|
for (--i; i >= 0; i--) { |
|
if (!css->chps[i]) |
|
continue; |
|
chp_remove_cmg_attr(css->chps[i]); |
|
} |
|
return ret; |
|
} |
|
|
|
int __chsc_do_secm(struct channel_subsystem *css, int enable) |
|
{ |
|
struct { |
|
struct chsc_header request; |
|
u32 operation_code : 2; |
|
u32 : 30; |
|
u32 key : 4; |
|
u32 : 28; |
|
u32 zeroes1; |
|
u32 cub_addr1; |
|
u32 zeroes2; |
|
u32 cub_addr2; |
|
u32 reserved[13]; |
|
struct chsc_header response; |
|
u32 status : 8; |
|
u32 : 4; |
|
u32 fmt : 4; |
|
u32 : 16; |
|
} *secm_area; |
|
unsigned long flags; |
|
int ret, ccode; |
|
|
|
spin_lock_irqsave(&chsc_page_lock, flags); |
|
memset(chsc_page, 0, PAGE_SIZE); |
|
secm_area = chsc_page; |
|
secm_area->request.length = 0x0050; |
|
secm_area->request.code = 0x0016; |
|
|
|
secm_area->key = PAGE_DEFAULT_KEY >> 4; |
|
secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1; |
|
secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2; |
|
|
|
secm_area->operation_code = enable ? 0 : 1; |
|
|
|
ccode = chsc(secm_area); |
|
if (ccode > 0) { |
|
ret = (ccode == 3) ? -ENODEV : -EBUSY; |
|
goto out; |
|
} |
|
|
|
switch (secm_area->response.code) { |
|
case 0x0102: |
|
case 0x0103: |
|
ret = -EINVAL; |
|
break; |
|
default: |
|
ret = chsc_error_from_response(secm_area->response.code); |
|
} |
|
if (ret != 0) |
|
CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n", |
|
secm_area->response.code); |
|
out: |
|
spin_unlock_irqrestore(&chsc_page_lock, flags); |
|
return ret; |
|
} |
|
|
|
int |
|
chsc_secm(struct channel_subsystem *css, int enable) |
|
{ |
|
int ret; |
|
|
|
if (enable && !css->cm_enabled) { |
|
css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
|
css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
|
if (!css->cub_addr1 || !css->cub_addr2) { |
|
free_page((unsigned long)css->cub_addr1); |
|
free_page((unsigned long)css->cub_addr2); |
|
return -ENOMEM; |
|
} |
|
} |
|
ret = __chsc_do_secm(css, enable); |
|
if (!ret) { |
|
css->cm_enabled = enable; |
|
if (css->cm_enabled) { |
|
ret = chsc_add_cmg_attr(css); |
|
if (ret) { |
|
__chsc_do_secm(css, 0); |
|
css->cm_enabled = 0; |
|
} |
|
} else |
|
chsc_remove_cmg_attr(css); |
|
} |
|
if (!css->cm_enabled) { |
|
free_page((unsigned long)css->cub_addr1); |
|
free_page((unsigned long)css->cub_addr2); |
|
} |
|
return ret; |
|
} |
|
|
|
int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, |
|
int c, int m, void *page) |
|
{ |
|
struct chsc_scpd *scpd_area; |
|
int ccode, ret; |
|
|
|
if ((rfmt == 1 || rfmt == 0) && c == 1 && |
|
!css_general_characteristics.fcs) |
|
return -EINVAL; |
|
if ((rfmt == 2) && !css_general_characteristics.cib) |
|
return -EINVAL; |
|
if ((rfmt == 3) && !css_general_characteristics.util_str) |
|
return -EINVAL; |
|
|
|
memset(page, 0, PAGE_SIZE); |
|
scpd_area = page; |
|
scpd_area->request.length = 0x0010; |
|
scpd_area->request.code = 0x0002; |
|
scpd_area->cssid = chpid.cssid; |
|
scpd_area->first_chpid = chpid.id; |
|
scpd_area->last_chpid = chpid.id; |
|
scpd_area->m = m; |
|
scpd_area->c = c; |
|
scpd_area->fmt = fmt; |
|
scpd_area->rfmt = rfmt; |
|
|
|
ccode = chsc(scpd_area); |
|
if (ccode > 0) |
|
return (ccode == 3) ? -ENODEV : -EBUSY; |
|
|
|
ret = chsc_error_from_response(scpd_area->response.code); |
|
if (ret) |
|
CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n", |
|
scpd_area->response.code); |
|
return ret; |
|
} |
|
EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc); |
|
|
|
#define chsc_det_chp_desc(FMT, c) \ |
|
int chsc_determine_fmt##FMT##_channel_path_desc( \ |
|
struct chp_id chpid, struct channel_path_desc_fmt##FMT *desc) \ |
|
{ \ |
|
struct chsc_scpd *scpd_area; \ |
|
unsigned long flags; \ |
|
int ret; \ |
|
\ |
|
spin_lock_irqsave(&chsc_page_lock, flags); \ |
|
scpd_area = chsc_page; \ |
|
ret = chsc_determine_channel_path_desc(chpid, 0, FMT, c, 0, \ |
|
scpd_area); \ |
|
if (ret) \ |
|
goto out; \ |
|
\ |
|
memcpy(desc, scpd_area->data, sizeof(*desc)); \ |
|
out: \ |
|
spin_unlock_irqrestore(&chsc_page_lock, flags); \ |
|
return ret; \ |
|
} |
|
|
|
chsc_det_chp_desc(0, 0) |
|
chsc_det_chp_desc(1, 1) |
|
chsc_det_chp_desc(3, 0) |
|
|
|
static void |
|
chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, |
|
struct cmg_chars *chars) |
|
{ |
|
int i, mask; |
|
|
|
for (i = 0; i < NR_MEASUREMENT_CHARS; i++) { |
|
mask = 0x80 >> (i + 3); |
|
if (cmcv & mask) |
|
chp->cmg_chars.values[i] = chars->values[i]; |
|
else |
|
chp->cmg_chars.values[i] = 0; |
|
} |
|
} |
|
|
|
int chsc_get_channel_measurement_chars(struct channel_path *chp) |
|
{ |
|
unsigned long flags; |
|
int ccode, ret; |
|
|
|
struct { |
|
struct chsc_header request; |
|
u32 : 24; |
|
u32 first_chpid : 8; |
|
u32 : 24; |
|
u32 last_chpid : 8; |
|
u32 zeroes1; |
|
struct chsc_header response; |
|
u32 zeroes2; |
|
u32 not_valid : 1; |
|
u32 shared : 1; |
|
u32 : 22; |
|
u32 chpid : 8; |
|
u32 cmcv : 5; |
|
u32 : 11; |
|
u32 cmgq : 8; |
|
u32 cmg : 8; |
|
u32 zeroes3; |
|
u32 data[NR_MEASUREMENT_CHARS]; |
|
} *scmc_area; |
|
|
|
chp->shared = -1; |
|
chp->cmg = -1; |
|
|
|
if (!css_chsc_characteristics.scmc || !css_chsc_characteristics.secm) |
|
return -EINVAL; |
|
|
|
spin_lock_irqsave(&chsc_page_lock, flags); |
|
memset(chsc_page, 0, PAGE_SIZE); |
|
scmc_area = chsc_page; |
|
scmc_area->request.length = 0x0010; |
|
scmc_area->request.code = 0x0022; |
|
scmc_area->first_chpid = chp->chpid.id; |
|
scmc_area->last_chpid = chp->chpid.id; |
|
|
|
ccode = chsc(scmc_area); |
|
if (ccode > 0) { |
|
ret = (ccode == 3) ? -ENODEV : -EBUSY; |
|
goto out; |
|
} |
|
|
|
ret = chsc_error_from_response(scmc_area->response.code); |
|
if (ret) { |
|
CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n", |
|
scmc_area->response.code); |
|
goto out; |
|
} |
|
if (scmc_area->not_valid) |
|
goto out; |
|
|
|
chp->cmg = scmc_area->cmg; |
|
chp->shared = scmc_area->shared; |
|
if (chp->cmg != 2 && chp->cmg != 3) { |
|
/* No cmg-dependent data. */ |
|
goto out; |
|
} |
|
chsc_initialize_cmg_chars(chp, scmc_area->cmcv, |
|
(struct cmg_chars *) &scmc_area->data); |
|
out: |
|
spin_unlock_irqrestore(&chsc_page_lock, flags); |
|
return ret; |
|
} |
|
|
|
int __init chsc_init(void) |
|
{ |
|
int ret; |
|
|
|
sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
|
chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
|
if (!sei_page || !chsc_page) { |
|
ret = -ENOMEM; |
|
goto out_err; |
|
} |
|
ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw); |
|
if (ret) |
|
goto out_err; |
|
return ret; |
|
out_err: |
|
free_page((unsigned long)chsc_page); |
|
free_page((unsigned long)sei_page); |
|
return ret; |
|
} |
|
|
|
void __init chsc_init_cleanup(void) |
|
{ |
|
crw_unregister_handler(CRW_RSC_CSS); |
|
free_page((unsigned long)chsc_page); |
|
free_page((unsigned long)sei_page); |
|
} |
|
|
|
int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code) |
|
{ |
|
int ret; |
|
|
|
sda_area->request.length = 0x0400; |
|
sda_area->request.code = 0x0031; |
|
sda_area->operation_code = operation_code; |
|
|
|
ret = chsc(sda_area); |
|
if (ret > 0) { |
|
ret = (ret == 3) ? -ENODEV : -EBUSY; |
|
goto out; |
|
} |
|
|
|
switch (sda_area->response.code) { |
|
case 0x0101: |
|
ret = -EOPNOTSUPP; |
|
break; |
|
default: |
|
ret = chsc_error_from_response(sda_area->response.code); |
|
} |
|
out: |
|
return ret; |
|
} |
|
|
|
int chsc_enable_facility(int operation_code) |
|
{ |
|
struct chsc_sda_area *sda_area; |
|
unsigned long flags; |
|
int ret; |
|
|
|
spin_lock_irqsave(&chsc_page_lock, flags); |
|
memset(chsc_page, 0, PAGE_SIZE); |
|
sda_area = chsc_page; |
|
|
|
ret = __chsc_enable_facility(sda_area, operation_code); |
|
if (ret != 0) |
|
CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n", |
|
operation_code, sda_area->response.code); |
|
|
|
spin_unlock_irqrestore(&chsc_page_lock, flags); |
|
return ret; |
|
} |
|
|
|
int __init chsc_get_cssid_iid(int idx, u8 *cssid, u8 *iid) |
|
{ |
|
struct { |
|
struct chsc_header request; |
|
u8 atype; |
|
u32 : 24; |
|
u32 reserved1[6]; |
|
struct chsc_header response; |
|
u32 reserved2[3]; |
|
struct { |
|
u8 cssid; |
|
u8 iid; |
|
u32 : 16; |
|
} list[0]; |
|
} *sdcal_area; |
|
int ret; |
|
|
|
spin_lock_irq(&chsc_page_lock); |
|
memset(chsc_page, 0, PAGE_SIZE); |
|
sdcal_area = chsc_page; |
|
sdcal_area->request.length = 0x0020; |
|
sdcal_area->request.code = 0x0034; |
|
sdcal_area->atype = 4; |
|
|
|
ret = chsc(sdcal_area); |
|
if (ret) { |
|
ret = (ret == 3) ? -ENODEV : -EBUSY; |
|
goto exit; |
|
} |
|
|
|
ret = chsc_error_from_response(sdcal_area->response.code); |
|
if (ret) { |
|
CIO_CRW_EVENT(2, "chsc: sdcal failed (rc=%04x)\n", |
|
sdcal_area->response.code); |
|
goto exit; |
|
} |
|
|
|
if ((addr_t) &sdcal_area->list[idx] < |
|
(addr_t) &sdcal_area->response + sdcal_area->response.length) { |
|
*cssid = sdcal_area->list[idx].cssid; |
|
*iid = sdcal_area->list[idx].iid; |
|
} |
|
else |
|
ret = -ENODEV; |
|
exit: |
|
spin_unlock_irq(&chsc_page_lock); |
|
return ret; |
|
} |
|
|
|
struct css_general_char css_general_characteristics; |
|
struct css_chsc_char css_chsc_characteristics; |
|
|
|
int __init |
|
chsc_determine_css_characteristics(void) |
|
{ |
|
unsigned long flags; |
|
int result; |
|
struct { |
|
struct chsc_header request; |
|
u32 reserved1; |
|
u32 reserved2; |
|
u32 reserved3; |
|
struct chsc_header response; |
|
u32 reserved4; |
|
u32 general_char[510]; |
|
u32 chsc_char[508]; |
|
} *scsc_area; |
|
|
|
spin_lock_irqsave(&chsc_page_lock, flags); |
|
memset(chsc_page, 0, PAGE_SIZE); |
|
scsc_area = chsc_page; |
|
scsc_area->request.length = 0x0010; |
|
scsc_area->request.code = 0x0010; |
|
|
|
result = chsc(scsc_area); |
|
if (result) { |
|
result = (result == 3) ? -ENODEV : -EBUSY; |
|
goto exit; |
|
} |
|
|
|
result = chsc_error_from_response(scsc_area->response.code); |
|
if (result == 0) { |
|
memcpy(&css_general_characteristics, scsc_area->general_char, |
|
sizeof(css_general_characteristics)); |
|
memcpy(&css_chsc_characteristics, scsc_area->chsc_char, |
|
sizeof(css_chsc_characteristics)); |
|
} else |
|
CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n", |
|
scsc_area->response.code); |
|
exit: |
|
spin_unlock_irqrestore(&chsc_page_lock, flags); |
|
return result; |
|
} |
|
|
|
EXPORT_SYMBOL_GPL(css_general_characteristics); |
|
EXPORT_SYMBOL_GPL(css_chsc_characteristics); |
|
|
|
int chsc_sstpc(void *page, unsigned int op, u16 ctrl, u64 *clock_delta) |
|
{ |
|
struct { |
|
struct chsc_header request; |
|
unsigned int rsvd0; |
|
unsigned int op : 8; |
|
unsigned int rsvd1 : 8; |
|
unsigned int ctrl : 16; |
|
unsigned int rsvd2[5]; |
|
struct chsc_header response; |
|
unsigned int rsvd3[3]; |
|
u64 clock_delta; |
|
unsigned int rsvd4[2]; |
|
} *rr; |
|
int rc; |
|
|
|
memset(page, 0, PAGE_SIZE); |
|
rr = page; |
|
rr->request.length = 0x0020; |
|
rr->request.code = 0x0033; |
|
rr->op = op; |
|
rr->ctrl = ctrl; |
|
rc = chsc(rr); |
|
if (rc) |
|
return -EIO; |
|
rc = (rr->response.code == 0x0001) ? 0 : -EIO; |
|
if (clock_delta) |
|
*clock_delta = rr->clock_delta; |
|
return rc; |
|
} |
|
|
|
int chsc_sstpi(void *page, void *result, size_t size) |
|
{ |
|
struct { |
|
struct chsc_header request; |
|
unsigned int rsvd0[3]; |
|
struct chsc_header response; |
|
char data[]; |
|
} *rr; |
|
int rc; |
|
|
|
memset(page, 0, PAGE_SIZE); |
|
rr = page; |
|
rr->request.length = 0x0010; |
|
rr->request.code = 0x0038; |
|
rc = chsc(rr); |
|
if (rc) |
|
return -EIO; |
|
memcpy(result, &rr->data, size); |
|
return (rr->response.code == 0x0001) ? 0 : -EIO; |
|
} |
|
|
|
int chsc_stzi(void *page, void *result, size_t size) |
|
{ |
|
struct { |
|
struct chsc_header request; |
|
unsigned int rsvd0[3]; |
|
struct chsc_header response; |
|
char data[]; |
|
} *rr; |
|
int rc; |
|
|
|
memset(page, 0, PAGE_SIZE); |
|
rr = page; |
|
rr->request.length = 0x0010; |
|
rr->request.code = 0x003e; |
|
rc = chsc(rr); |
|
if (rc) |
|
return -EIO; |
|
memcpy(result, &rr->data, size); |
|
return (rr->response.code == 0x0001) ? 0 : -EIO; |
|
} |
|
|
|
int chsc_siosl(struct subchannel_id schid) |
|
{ |
|
struct { |
|
struct chsc_header request; |
|
u32 word1; |
|
struct subchannel_id sid; |
|
u32 word3; |
|
struct chsc_header response; |
|
u32 word[11]; |
|
} *siosl_area; |
|
unsigned long flags; |
|
int ccode; |
|
int rc; |
|
|
|
spin_lock_irqsave(&chsc_page_lock, flags); |
|
memset(chsc_page, 0, PAGE_SIZE); |
|
siosl_area = chsc_page; |
|
siosl_area->request.length = 0x0010; |
|
siosl_area->request.code = 0x0046; |
|
siosl_area->word1 = 0x80000000; |
|
siosl_area->sid = schid; |
|
|
|
ccode = chsc(siosl_area); |
|
if (ccode > 0) { |
|
if (ccode == 3) |
|
rc = -ENODEV; |
|
else |
|
rc = -EBUSY; |
|
CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n", |
|
schid.ssid, schid.sch_no, ccode); |
|
goto out; |
|
} |
|
rc = chsc_error_from_response(siosl_area->response.code); |
|
if (rc) |
|
CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n", |
|
schid.ssid, schid.sch_no, |
|
siosl_area->response.code); |
|
else |
|
CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n", |
|
schid.ssid, schid.sch_no); |
|
out: |
|
spin_unlock_irqrestore(&chsc_page_lock, flags); |
|
return rc; |
|
} |
|
EXPORT_SYMBOL_GPL(chsc_siosl); |
|
|
|
/** |
|
* chsc_scm_info() - store SCM information (SSI) |
|
* @scm_area: request and response block for SSI |
|
* @token: continuation token |
|
* |
|
* Returns 0 on success. |
|
*/ |
|
int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token) |
|
{ |
|
int ccode, ret; |
|
|
|
memset(scm_area, 0, sizeof(*scm_area)); |
|
scm_area->request.length = 0x0020; |
|
scm_area->request.code = 0x004C; |
|
scm_area->reqtok = token; |
|
|
|
ccode = chsc(scm_area); |
|
if (ccode > 0) { |
|
ret = (ccode == 3) ? -ENODEV : -EBUSY; |
|
goto out; |
|
} |
|
ret = chsc_error_from_response(scm_area->response.code); |
|
if (ret != 0) |
|
CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n", |
|
scm_area->response.code); |
|
out: |
|
return ret; |
|
} |
|
EXPORT_SYMBOL_GPL(chsc_scm_info); |
|
|
|
/** |
|
* chsc_pnso() - Perform Network-Subchannel Operation |
|
* @schid: id of the subchannel on which PNSO is performed |
|
* @pnso_area: request and response block for the operation |
|
* @oc: Operation Code |
|
* @resume_token: resume token for multiblock response |
|
* @cnc: Boolean change-notification control |
|
* |
|
* pnso_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL) |
|
* |
|
* Returns 0 on success. |
|
*/ |
|
int chsc_pnso(struct subchannel_id schid, struct chsc_pnso_area *pnso_area, |
|
u8 oc, struct chsc_pnso_resume_token resume_token, int cnc) |
|
{ |
|
memset(pnso_area, 0, sizeof(*pnso_area)); |
|
pnso_area->request.length = 0x0030; |
|
pnso_area->request.code = 0x003d; /* network-subchannel operation */ |
|
pnso_area->m = schid.m; |
|
pnso_area->ssid = schid.ssid; |
|
pnso_area->sch = schid.sch_no; |
|
pnso_area->cssid = schid.cssid; |
|
pnso_area->oc = oc; |
|
pnso_area->resume_token = resume_token; |
|
pnso_area->n = (cnc != 0); |
|
if (chsc(pnso_area)) |
|
return -EIO; |
|
return chsc_error_from_response(pnso_area->response.code); |
|
} |
|
|
|
int chsc_sgib(u32 origin) |
|
{ |
|
struct { |
|
struct chsc_header request; |
|
u16 op; |
|
u8 reserved01[2]; |
|
u8 reserved02:4; |
|
u8 fmt:4; |
|
u8 reserved03[7]; |
|
/* operation data area begin */ |
|
u8 reserved04[4]; |
|
u32 gib_origin; |
|
u8 reserved05[10]; |
|
u8 aix; |
|
u8 reserved06[4029]; |
|
struct chsc_header response; |
|
u8 reserved07[4]; |
|
} *sgib_area; |
|
int ret; |
|
|
|
spin_lock_irq(&chsc_page_lock); |
|
memset(chsc_page, 0, PAGE_SIZE); |
|
sgib_area = chsc_page; |
|
sgib_area->request.length = 0x0fe0; |
|
sgib_area->request.code = 0x0021; |
|
sgib_area->op = 0x1; |
|
sgib_area->gib_origin = origin; |
|
|
|
ret = chsc(sgib_area); |
|
if (ret == 0) |
|
ret = chsc_error_from_response(sgib_area->response.code); |
|
spin_unlock_irq(&chsc_page_lock); |
|
|
|
return ret; |
|
} |
|
EXPORT_SYMBOL_GPL(chsc_sgib); |
|
|
|
#define SCUD_REQ_LEN 0x10 /* SCUD request block length */ |
|
#define SCUD_REQ_CMD 0x4b /* SCUD Command Code */ |
|
|
|
struct chse_cudb { |
|
u16 flags:8; |
|
u16 chp_valid:8; |
|
u16 cu; |
|
u32 esm_valid:8; |
|
u32:24; |
|
u8 chpid[8]; |
|
u32:32; |
|
u32:32; |
|
u8 esm[8]; |
|
u32 efla[8]; |
|
} __packed; |
|
|
|
struct chsc_scud { |
|
struct chsc_header request; |
|
u16:4; |
|
u16 fmt:4; |
|
u16 cssid:8; |
|
u16 first_cu; |
|
u16:16; |
|
u16 last_cu; |
|
u32:32; |
|
struct chsc_header response; |
|
u16:4; |
|
u16 fmt_resp:4; |
|
u32:24; |
|
struct chse_cudb cudb[]; |
|
} __packed; |
|
|
|
/** |
|
* chsc_scud() - Store control-unit description. |
|
* @cu: number of the control-unit |
|
* @esm: 8 1-byte endpoint security mode values |
|
* @esm_valid: validity mask for @esm |
|
* |
|
* Interface to retrieve information about the endpoint security |
|
* modes for up to 8 paths of a control unit. |
|
* |
|
* Returns 0 on success. |
|
*/ |
|
int chsc_scud(u16 cu, u64 *esm, u8 *esm_valid) |
|
{ |
|
struct chsc_scud *scud = chsc_page; |
|
int ret; |
|
|
|
spin_lock_irq(&chsc_page_lock); |
|
memset(chsc_page, 0, PAGE_SIZE); |
|
scud->request.length = SCUD_REQ_LEN; |
|
scud->request.code = SCUD_REQ_CMD; |
|
scud->fmt = 0; |
|
scud->cssid = 0; |
|
scud->first_cu = cu; |
|
scud->last_cu = cu; |
|
|
|
ret = chsc(scud); |
|
if (!ret) |
|
ret = chsc_error_from_response(scud->response.code); |
|
|
|
if (!ret && (scud->response.length <= 8 || scud->fmt_resp != 0 |
|
|| !(scud->cudb[0].flags & 0x80) |
|
|| scud->cudb[0].cu != cu)) { |
|
|
|
CIO_MSG_EVENT(2, "chsc: scud failed rc=%04x, L2=%04x " |
|
"FMT=%04x, cudb.flags=%02x, cudb.cu=%04x", |
|
scud->response.code, scud->response.length, |
|
scud->fmt_resp, scud->cudb[0].flags, scud->cudb[0].cu); |
|
ret = -EINVAL; |
|
} |
|
|
|
if (ret) |
|
goto out; |
|
|
|
memcpy(esm, scud->cudb[0].esm, sizeof(*esm)); |
|
*esm_valid = scud->cudb[0].esm_valid; |
|
out: |
|
spin_unlock_irq(&chsc_page_lock); |
|
return ret; |
|
} |
|
EXPORT_SYMBOL_GPL(chsc_scud);
|
|
|