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1926 lines
46 KiB
1926 lines
46 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. 1999,2001 |
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* |
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* Device mapping and dasd= parameter parsing functions. All devmap |
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* functions may not be called from interrupt context. In particular |
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* dasd_get_device is a no-no from interrupt context. |
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* |
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*/ |
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|
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#define KMSG_COMPONENT "dasd" |
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|
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#include <linux/ctype.h> |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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|
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#include <asm/debug.h> |
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#include <linux/uaccess.h> |
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#include <asm/ipl.h> |
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|
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/* This is ugly... */ |
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#define PRINTK_HEADER "dasd_devmap:" |
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#define DASD_BUS_ID_SIZE 20 |
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#define DASD_MAX_PARAMS 256 |
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|
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#include "dasd_int.h" |
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|
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struct kmem_cache *dasd_page_cache; |
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EXPORT_SYMBOL_GPL(dasd_page_cache); |
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|
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/* |
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* dasd_devmap_t is used to store the features and the relation |
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* between device number and device index. To find a dasd_devmap_t |
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* that corresponds to a device number of a device index each |
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* dasd_devmap_t is added to two linked lists, one to search by |
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* the device number and one to search by the device index. As |
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* soon as big minor numbers are available the device index list |
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* can be removed since the device number will then be identical |
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* to the device index. |
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*/ |
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struct dasd_devmap { |
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struct list_head list; |
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char bus_id[DASD_BUS_ID_SIZE]; |
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unsigned int devindex; |
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unsigned short features; |
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struct dasd_device *device; |
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}; |
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|
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/* |
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* Parameter parsing functions for dasd= parameter. The syntax is: |
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* <devno> : (0x)?[0-9a-fA-F]+ |
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* <busid> : [0-0a-f]\.[0-9a-f]\.(0x)?[0-9a-fA-F]+ |
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* <feature> : ro |
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* <feature_list> : \(<feature>(:<feature>)*\) |
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* <devno-range> : <devno>(-<devno>)?<feature_list>? |
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* <busid-range> : <busid>(-<busid>)?<feature_list>? |
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* <devices> : <devno-range>|<busid-range> |
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* <dasd_module> : dasd_diag_mod|dasd_eckd_mod|dasd_fba_mod |
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* |
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* <dasd> : autodetect|probeonly|<devices>(,<devices>)* |
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*/ |
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|
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int dasd_probeonly = 0; /* is true, when probeonly mode is active */ |
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int dasd_autodetect = 0; /* is true, when autodetection is active */ |
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int dasd_nopav = 0; /* is true, when PAV is disabled */ |
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EXPORT_SYMBOL_GPL(dasd_nopav); |
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int dasd_nofcx; /* disable High Performance Ficon */ |
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EXPORT_SYMBOL_GPL(dasd_nofcx); |
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|
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/* |
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* char *dasd[] is intended to hold the ranges supplied by the dasd= statement |
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* it is named 'dasd' to directly be filled by insmod with the comma separated |
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* strings when running as a module. |
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*/ |
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static char *dasd[DASD_MAX_PARAMS]; |
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module_param_array(dasd, charp, NULL, S_IRUGO); |
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|
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/* |
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* Single spinlock to protect devmap and servermap structures and lists. |
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*/ |
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static DEFINE_SPINLOCK(dasd_devmap_lock); |
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|
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/* |
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* Hash lists for devmap structures. |
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*/ |
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static struct list_head dasd_hashlists[256]; |
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int dasd_max_devindex; |
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|
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static struct dasd_devmap *dasd_add_busid(const char *, int); |
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|
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static inline int |
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dasd_hash_busid(const char *bus_id) |
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{ |
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int hash, i; |
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|
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hash = 0; |
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for (i = 0; (i < DASD_BUS_ID_SIZE) && *bus_id; i++, bus_id++) |
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hash += *bus_id; |
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return hash & 0xff; |
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} |
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|
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#ifndef MODULE |
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static int __init dasd_call_setup(char *opt) |
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{ |
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static int i __initdata; |
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char *tmp; |
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|
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while (i < DASD_MAX_PARAMS) { |
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tmp = strsep(&opt, ","); |
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if (!tmp) |
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break; |
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|
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dasd[i++] = tmp; |
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} |
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|
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return 1; |
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} |
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|
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__setup ("dasd=", dasd_call_setup); |
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#endif /* #ifndef MODULE */ |
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|
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#define DASD_IPLDEV "ipldev" |
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|
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/* |
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* Read a device busid/devno from a string. |
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*/ |
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static int __init dasd_busid(char *str, int *id0, int *id1, int *devno) |
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{ |
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unsigned int val; |
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char *tok; |
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|
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/* Interpret ipldev busid */ |
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if (strncmp(DASD_IPLDEV, str, strlen(DASD_IPLDEV)) == 0) { |
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if (ipl_info.type != IPL_TYPE_CCW) { |
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pr_err("The IPL device is not a CCW device\n"); |
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return -EINVAL; |
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} |
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*id0 = 0; |
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*id1 = ipl_info.data.ccw.dev_id.ssid; |
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*devno = ipl_info.data.ccw.dev_id.devno; |
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|
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return 0; |
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} |
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|
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/* Old style 0xXXXX or XXXX */ |
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if (!kstrtouint(str, 16, &val)) { |
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*id0 = *id1 = 0; |
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if (val > 0xffff) |
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return -EINVAL; |
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*devno = val; |
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return 0; |
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} |
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|
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/* New style x.y.z busid */ |
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tok = strsep(&str, "."); |
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if (kstrtouint(tok, 16, &val) || val > 0xff) |
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return -EINVAL; |
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*id0 = val; |
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|
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tok = strsep(&str, "."); |
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if (kstrtouint(tok, 16, &val) || val > 0xff) |
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return -EINVAL; |
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*id1 = val; |
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|
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tok = strsep(&str, "."); |
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if (kstrtouint(tok, 16, &val) || val > 0xffff) |
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return -EINVAL; |
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*devno = val; |
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|
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return 0; |
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} |
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|
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/* |
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* Read colon separated list of dasd features. |
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*/ |
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static int __init dasd_feature_list(char *str) |
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{ |
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int features, len, rc; |
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|
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features = 0; |
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rc = 0; |
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|
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if (!str) |
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return DASD_FEATURE_DEFAULT; |
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|
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while (1) { |
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for (len = 0; |
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str[len] && str[len] != ':' && str[len] != ')'; len++); |
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if (len == 2 && !strncmp(str, "ro", 2)) |
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features |= DASD_FEATURE_READONLY; |
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else if (len == 4 && !strncmp(str, "diag", 4)) |
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features |= DASD_FEATURE_USEDIAG; |
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else if (len == 3 && !strncmp(str, "raw", 3)) |
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features |= DASD_FEATURE_USERAW; |
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else if (len == 6 && !strncmp(str, "erplog", 6)) |
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features |= DASD_FEATURE_ERPLOG; |
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else if (len == 8 && !strncmp(str, "failfast", 8)) |
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features |= DASD_FEATURE_FAILFAST; |
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else { |
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pr_warn("%.*s is not a supported device option\n", |
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len, str); |
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rc = -EINVAL; |
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} |
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str += len; |
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if (*str != ':') |
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break; |
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str++; |
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} |
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|
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return rc ? : features; |
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} |
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|
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/* |
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* Try to match the first element on the comma separated parse string |
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* with one of the known keywords. If a keyword is found, take the approprate |
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* action and return a pointer to the residual string. If the first element |
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* could not be matched to any keyword then return an error code. |
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*/ |
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static int __init dasd_parse_keyword(char *keyword) |
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{ |
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int length = strlen(keyword); |
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|
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if (strncmp("autodetect", keyword, length) == 0) { |
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dasd_autodetect = 1; |
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pr_info("The autodetection mode has been activated\n"); |
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return 0; |
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} |
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if (strncmp("probeonly", keyword, length) == 0) { |
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dasd_probeonly = 1; |
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pr_info("The probeonly mode has been activated\n"); |
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return 0; |
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} |
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if (strncmp("nopav", keyword, length) == 0) { |
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if (MACHINE_IS_VM) |
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pr_info("'nopav' is not supported on z/VM\n"); |
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else { |
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dasd_nopav = 1; |
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pr_info("PAV support has be deactivated\n"); |
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} |
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return 0; |
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} |
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if (strncmp("nofcx", keyword, length) == 0) { |
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dasd_nofcx = 1; |
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pr_info("High Performance FICON support has been " |
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"deactivated\n"); |
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return 0; |
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} |
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if (strncmp("fixedbuffers", keyword, length) == 0) { |
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if (dasd_page_cache) |
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return 0; |
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dasd_page_cache = |
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kmem_cache_create("dasd_page_cache", PAGE_SIZE, |
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PAGE_SIZE, SLAB_CACHE_DMA, |
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NULL); |
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if (!dasd_page_cache) |
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DBF_EVENT(DBF_WARNING, "%s", "Failed to create slab, " |
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"fixed buffer mode disabled."); |
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else |
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DBF_EVENT(DBF_INFO, "%s", |
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"turning on fixed buffer mode"); |
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return 0; |
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} |
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|
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return -EINVAL; |
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} |
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|
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/* |
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* Split a string of a device range into its pieces and return the from, to, and |
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* feature parts separately. |
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* e.g.: |
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* 0.0.1234-0.0.5678(ro:erplog) -> from: 0.0.1234 to: 0.0.5678 features: ro:erplog |
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* 0.0.8765(raw) -> from: 0.0.8765 to: null features: raw |
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* 0x4321 -> from: 0x4321 to: null features: null |
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*/ |
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static int __init dasd_evaluate_range_param(char *range, char **from_str, |
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char **to_str, char **features_str) |
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{ |
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int rc = 0; |
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|
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/* Do we have a range or a single device? */ |
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if (strchr(range, '-')) { |
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*from_str = strsep(&range, "-"); |
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*to_str = strsep(&range, "("); |
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*features_str = strsep(&range, ")"); |
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} else { |
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*from_str = strsep(&range, "("); |
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*features_str = strsep(&range, ")"); |
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} |
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if (*features_str && !range) { |
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pr_warn("A closing parenthesis ')' is missing in the dasd= parameter\n"); |
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rc = -EINVAL; |
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} |
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return rc; |
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} |
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/* |
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* Try to interprete the range string as a device number or a range of devices. |
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* If the interpretation is successful, create the matching dasd_devmap entries. |
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* If interpretation fails or in case of an error, return an error code. |
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*/ |
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static int __init dasd_parse_range(const char *range) |
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{ |
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struct dasd_devmap *devmap; |
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int from, from_id0, from_id1; |
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int to, to_id0, to_id1; |
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int features; |
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char bus_id[DASD_BUS_ID_SIZE + 1]; |
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char *features_str = NULL; |
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char *from_str = NULL; |
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char *to_str = NULL; |
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int rc = 0; |
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char *tmp; |
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tmp = kstrdup(range, GFP_KERNEL); |
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if (!tmp) |
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return -ENOMEM; |
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|
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if (dasd_evaluate_range_param(tmp, &from_str, &to_str, &features_str)) { |
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rc = -EINVAL; |
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goto out; |
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} |
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if (dasd_busid(from_str, &from_id0, &from_id1, &from)) { |
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rc = -EINVAL; |
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goto out; |
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} |
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to = from; |
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to_id0 = from_id0; |
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to_id1 = from_id1; |
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if (to_str) { |
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if (dasd_busid(to_str, &to_id0, &to_id1, &to)) { |
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rc = -EINVAL; |
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goto out; |
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} |
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if (from_id0 != to_id0 || from_id1 != to_id1 || from > to) { |
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pr_err("%s is not a valid device range\n", range); |
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rc = -EINVAL; |
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goto out; |
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} |
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} |
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|
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features = dasd_feature_list(features_str); |
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if (features < 0) { |
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rc = -EINVAL; |
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goto out; |
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} |
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/* each device in dasd= parameter should be set initially online */ |
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features |= DASD_FEATURE_INITIAL_ONLINE; |
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while (from <= to) { |
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sprintf(bus_id, "%01x.%01x.%04x", from_id0, from_id1, from++); |
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devmap = dasd_add_busid(bus_id, features); |
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if (IS_ERR(devmap)) { |
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rc = PTR_ERR(devmap); |
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goto out; |
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} |
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} |
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|
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out: |
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kfree(tmp); |
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|
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return rc; |
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} |
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|
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/* |
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* Parse parameters stored in dasd[] |
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* The 'dasd=...' parameter allows to specify a comma separated list of |
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* keywords and device ranges. The parameters in that list will be stored as |
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* separate elementes in dasd[]. |
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*/ |
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int __init dasd_parse(void) |
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{ |
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int rc, i; |
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char *cur; |
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|
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rc = 0; |
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for (i = 0; i < DASD_MAX_PARAMS; i++) { |
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cur = dasd[i]; |
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if (!cur) |
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break; |
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if (*cur == '\0') |
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continue; |
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|
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rc = dasd_parse_keyword(cur); |
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if (rc) |
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rc = dasd_parse_range(cur); |
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|
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if (rc) |
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break; |
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} |
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|
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return rc; |
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} |
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|
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/* |
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* Add a devmap for the device specified by busid. It is possible that |
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* the devmap already exists (dasd= parameter). The order of the devices |
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* added through this function will define the kdevs for the individual |
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* devices. |
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*/ |
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static struct dasd_devmap * |
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dasd_add_busid(const char *bus_id, int features) |
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{ |
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struct dasd_devmap *devmap, *new, *tmp; |
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int hash; |
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|
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new = kzalloc(sizeof(struct dasd_devmap), GFP_KERNEL); |
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if (!new) |
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return ERR_PTR(-ENOMEM); |
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spin_lock(&dasd_devmap_lock); |
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devmap = NULL; |
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hash = dasd_hash_busid(bus_id); |
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list_for_each_entry(tmp, &dasd_hashlists[hash], list) |
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if (strncmp(tmp->bus_id, bus_id, DASD_BUS_ID_SIZE) == 0) { |
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devmap = tmp; |
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break; |
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} |
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if (!devmap) { |
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/* This bus_id is new. */ |
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new->devindex = dasd_max_devindex++; |
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strlcpy(new->bus_id, bus_id, DASD_BUS_ID_SIZE); |
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new->features = features; |
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new->device = NULL; |
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list_add(&new->list, &dasd_hashlists[hash]); |
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devmap = new; |
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new = NULL; |
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} |
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spin_unlock(&dasd_devmap_lock); |
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kfree(new); |
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return devmap; |
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} |
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|
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/* |
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* Find devmap for device with given bus_id. |
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*/ |
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static struct dasd_devmap * |
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dasd_find_busid(const char *bus_id) |
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{ |
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struct dasd_devmap *devmap, *tmp; |
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int hash; |
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|
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spin_lock(&dasd_devmap_lock); |
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devmap = ERR_PTR(-ENODEV); |
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hash = dasd_hash_busid(bus_id); |
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list_for_each_entry(tmp, &dasd_hashlists[hash], list) { |
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if (strncmp(tmp->bus_id, bus_id, DASD_BUS_ID_SIZE) == 0) { |
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devmap = tmp; |
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break; |
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} |
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} |
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spin_unlock(&dasd_devmap_lock); |
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return devmap; |
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} |
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|
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/* |
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* Check if busid has been added to the list of dasd ranges. |
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*/ |
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int |
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dasd_busid_known(const char *bus_id) |
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{ |
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return IS_ERR(dasd_find_busid(bus_id)) ? -ENOENT : 0; |
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} |
|
|
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/* |
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* Forget all about the device numbers added so far. |
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* This may only be called at module unload or system shutdown. |
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*/ |
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static void |
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dasd_forget_ranges(void) |
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{ |
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struct dasd_devmap *devmap, *n; |
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int i; |
|
|
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spin_lock(&dasd_devmap_lock); |
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for (i = 0; i < 256; i++) { |
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list_for_each_entry_safe(devmap, n, &dasd_hashlists[i], list) { |
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BUG_ON(devmap->device != NULL); |
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list_del(&devmap->list); |
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kfree(devmap); |
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} |
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} |
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spin_unlock(&dasd_devmap_lock); |
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} |
|
|
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/* |
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* Find the device struct by its device index. |
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*/ |
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struct dasd_device * |
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dasd_device_from_devindex(int devindex) |
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{ |
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struct dasd_devmap *devmap, *tmp; |
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struct dasd_device *device; |
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int i; |
|
|
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spin_lock(&dasd_devmap_lock); |
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devmap = NULL; |
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for (i = 0; (i < 256) && !devmap; i++) |
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list_for_each_entry(tmp, &dasd_hashlists[i], list) |
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if (tmp->devindex == devindex) { |
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/* Found the devmap for the device. */ |
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devmap = tmp; |
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break; |
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} |
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if (devmap && devmap->device) { |
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device = devmap->device; |
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dasd_get_device(device); |
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} else |
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device = ERR_PTR(-ENODEV); |
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spin_unlock(&dasd_devmap_lock); |
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return device; |
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} |
|
|
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/* |
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* Return devmap for cdev. If no devmap exists yet, create one and |
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* connect it to the cdev. |
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*/ |
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static struct dasd_devmap * |
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dasd_devmap_from_cdev(struct ccw_device *cdev) |
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{ |
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struct dasd_devmap *devmap; |
|
|
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devmap = dasd_find_busid(dev_name(&cdev->dev)); |
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if (IS_ERR(devmap)) |
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devmap = dasd_add_busid(dev_name(&cdev->dev), |
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DASD_FEATURE_DEFAULT); |
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return devmap; |
|
} |
|
|
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/* |
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* Create a dasd device structure for cdev. |
|
*/ |
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struct dasd_device * |
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dasd_create_device(struct ccw_device *cdev) |
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{ |
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struct dasd_devmap *devmap; |
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struct dasd_device *device; |
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unsigned long flags; |
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int rc; |
|
|
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devmap = dasd_devmap_from_cdev(cdev); |
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if (IS_ERR(devmap)) |
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return (void *) devmap; |
|
|
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device = dasd_alloc_device(); |
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if (IS_ERR(device)) |
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return device; |
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atomic_set(&device->ref_count, 3); |
|
|
|
spin_lock(&dasd_devmap_lock); |
|
if (!devmap->device) { |
|
devmap->device = device; |
|
device->devindex = devmap->devindex; |
|
device->features = devmap->features; |
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get_device(&cdev->dev); |
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device->cdev = cdev; |
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rc = 0; |
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} else |
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/* Someone else was faster. */ |
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rc = -EBUSY; |
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spin_unlock(&dasd_devmap_lock); |
|
|
|
if (rc) { |
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dasd_free_device(device); |
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return ERR_PTR(rc); |
|
} |
|
|
|
spin_lock_irqsave(get_ccwdev_lock(cdev), flags); |
|
dev_set_drvdata(&cdev->dev, device); |
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spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
|
|
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device->paths_info = kset_create_and_add("paths_info", NULL, |
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&device->cdev->dev.kobj); |
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if (!device->paths_info) |
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dev_warn(&cdev->dev, "Could not create paths_info kset\n"); |
|
|
|
return device; |
|
} |
|
|
|
/* |
|
* Wait queue for dasd_delete_device waits. |
|
*/ |
|
static DECLARE_WAIT_QUEUE_HEAD(dasd_delete_wq); |
|
|
|
/* |
|
* Remove a dasd device structure. The passed referenced |
|
* is destroyed. |
|
*/ |
|
void |
|
dasd_delete_device(struct dasd_device *device) |
|
{ |
|
struct ccw_device *cdev; |
|
struct dasd_devmap *devmap; |
|
unsigned long flags; |
|
|
|
/* First remove device pointer from devmap. */ |
|
devmap = dasd_find_busid(dev_name(&device->cdev->dev)); |
|
BUG_ON(IS_ERR(devmap)); |
|
spin_lock(&dasd_devmap_lock); |
|
if (devmap->device != device) { |
|
spin_unlock(&dasd_devmap_lock); |
|
dasd_put_device(device); |
|
return; |
|
} |
|
devmap->device = NULL; |
|
spin_unlock(&dasd_devmap_lock); |
|
|
|
/* Disconnect dasd_device structure from ccw_device structure. */ |
|
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
|
dev_set_drvdata(&device->cdev->dev, NULL); |
|
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
|
|
|
/* |
|
* Drop ref_count by 3, one for the devmap reference, one for |
|
* the cdev reference and one for the passed reference. |
|
*/ |
|
atomic_sub(3, &device->ref_count); |
|
|
|
/* Wait for reference counter to drop to zero. */ |
|
wait_event(dasd_delete_wq, atomic_read(&device->ref_count) == 0); |
|
|
|
dasd_generic_free_discipline(device); |
|
|
|
kset_unregister(device->paths_info); |
|
|
|
/* Disconnect dasd_device structure from ccw_device structure. */ |
|
cdev = device->cdev; |
|
device->cdev = NULL; |
|
|
|
/* Put ccw_device structure. */ |
|
put_device(&cdev->dev); |
|
|
|
/* Now the device structure can be freed. */ |
|
dasd_free_device(device); |
|
} |
|
|
|
/* |
|
* Reference counter dropped to zero. Wake up waiter |
|
* in dasd_delete_device. |
|
*/ |
|
void |
|
dasd_put_device_wake(struct dasd_device *device) |
|
{ |
|
wake_up(&dasd_delete_wq); |
|
} |
|
EXPORT_SYMBOL_GPL(dasd_put_device_wake); |
|
|
|
/* |
|
* Return dasd_device structure associated with cdev. |
|
* This function needs to be called with the ccw device |
|
* lock held. It can be used from interrupt context. |
|
*/ |
|
struct dasd_device * |
|
dasd_device_from_cdev_locked(struct ccw_device *cdev) |
|
{ |
|
struct dasd_device *device = dev_get_drvdata(&cdev->dev); |
|
|
|
if (!device) |
|
return ERR_PTR(-ENODEV); |
|
dasd_get_device(device); |
|
return device; |
|
} |
|
|
|
/* |
|
* Return dasd_device structure associated with cdev. |
|
*/ |
|
struct dasd_device * |
|
dasd_device_from_cdev(struct ccw_device *cdev) |
|
{ |
|
struct dasd_device *device; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(get_ccwdev_lock(cdev), flags); |
|
device = dasd_device_from_cdev_locked(cdev); |
|
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
|
return device; |
|
} |
|
|
|
void dasd_add_link_to_gendisk(struct gendisk *gdp, struct dasd_device *device) |
|
{ |
|
struct dasd_devmap *devmap; |
|
|
|
devmap = dasd_find_busid(dev_name(&device->cdev->dev)); |
|
if (IS_ERR(devmap)) |
|
return; |
|
spin_lock(&dasd_devmap_lock); |
|
gdp->private_data = devmap; |
|
spin_unlock(&dasd_devmap_lock); |
|
} |
|
|
|
struct dasd_device *dasd_device_from_gendisk(struct gendisk *gdp) |
|
{ |
|
struct dasd_device *device; |
|
struct dasd_devmap *devmap; |
|
|
|
if (!gdp->private_data) |
|
return NULL; |
|
device = NULL; |
|
spin_lock(&dasd_devmap_lock); |
|
devmap = gdp->private_data; |
|
if (devmap && devmap->device) { |
|
device = devmap->device; |
|
dasd_get_device(device); |
|
} |
|
spin_unlock(&dasd_devmap_lock); |
|
return device; |
|
} |
|
|
|
/* |
|
* SECTION: files in sysfs |
|
*/ |
|
|
|
/* |
|
* failfast controls the behaviour, if no path is available |
|
*/ |
|
static ssize_t dasd_ff_show(struct device *dev, struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct dasd_devmap *devmap; |
|
int ff_flag; |
|
|
|
devmap = dasd_find_busid(dev_name(dev)); |
|
if (!IS_ERR(devmap)) |
|
ff_flag = (devmap->features & DASD_FEATURE_FAILFAST) != 0; |
|
else |
|
ff_flag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_FAILFAST) != 0; |
|
return snprintf(buf, PAGE_SIZE, ff_flag ? "1\n" : "0\n"); |
|
} |
|
|
|
static ssize_t dasd_ff_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
unsigned int val; |
|
int rc; |
|
|
|
if (kstrtouint(buf, 0, &val) || val > 1) |
|
return -EINVAL; |
|
|
|
rc = dasd_set_feature(to_ccwdev(dev), DASD_FEATURE_FAILFAST, val); |
|
|
|
return rc ? : count; |
|
} |
|
|
|
static DEVICE_ATTR(failfast, 0644, dasd_ff_show, dasd_ff_store); |
|
|
|
/* |
|
* readonly controls the readonly status of a dasd |
|
*/ |
|
static ssize_t |
|
dasd_ro_show(struct device *dev, struct device_attribute *attr, char *buf) |
|
{ |
|
struct dasd_devmap *devmap; |
|
struct dasd_device *device; |
|
int ro_flag = 0; |
|
|
|
devmap = dasd_find_busid(dev_name(dev)); |
|
if (IS_ERR(devmap)) |
|
goto out; |
|
|
|
ro_flag = !!(devmap->features & DASD_FEATURE_READONLY); |
|
|
|
spin_lock(&dasd_devmap_lock); |
|
device = devmap->device; |
|
if (device) |
|
ro_flag |= test_bit(DASD_FLAG_DEVICE_RO, &device->flags); |
|
spin_unlock(&dasd_devmap_lock); |
|
|
|
out: |
|
return snprintf(buf, PAGE_SIZE, ro_flag ? "1\n" : "0\n"); |
|
} |
|
|
|
static ssize_t |
|
dasd_ro_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct ccw_device *cdev = to_ccwdev(dev); |
|
struct dasd_device *device; |
|
unsigned long flags; |
|
unsigned int val; |
|
int rc; |
|
|
|
if (kstrtouint(buf, 0, &val) || val > 1) |
|
return -EINVAL; |
|
|
|
rc = dasd_set_feature(cdev, DASD_FEATURE_READONLY, val); |
|
if (rc) |
|
return rc; |
|
|
|
device = dasd_device_from_cdev(cdev); |
|
if (IS_ERR(device)) |
|
return count; |
|
|
|
spin_lock_irqsave(get_ccwdev_lock(cdev), flags); |
|
val = val || test_bit(DASD_FLAG_DEVICE_RO, &device->flags); |
|
|
|
if (!device->block || !device->block->gdp || |
|
test_bit(DASD_FLAG_OFFLINE, &device->flags)) { |
|
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
|
goto out; |
|
} |
|
/* Increase open_count to avoid losing the block device */ |
|
atomic_inc(&device->block->open_count); |
|
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
|
|
|
set_disk_ro(device->block->gdp, val); |
|
atomic_dec(&device->block->open_count); |
|
|
|
out: |
|
dasd_put_device(device); |
|
|
|
return count; |
|
} |
|
|
|
static DEVICE_ATTR(readonly, 0644, dasd_ro_show, dasd_ro_store); |
|
/* |
|
* erplog controls the logging of ERP related data |
|
* (e.g. failing channel programs). |
|
*/ |
|
static ssize_t |
|
dasd_erplog_show(struct device *dev, struct device_attribute *attr, char *buf) |
|
{ |
|
struct dasd_devmap *devmap; |
|
int erplog; |
|
|
|
devmap = dasd_find_busid(dev_name(dev)); |
|
if (!IS_ERR(devmap)) |
|
erplog = (devmap->features & DASD_FEATURE_ERPLOG) != 0; |
|
else |
|
erplog = (DASD_FEATURE_DEFAULT & DASD_FEATURE_ERPLOG) != 0; |
|
return snprintf(buf, PAGE_SIZE, erplog ? "1\n" : "0\n"); |
|
} |
|
|
|
static ssize_t |
|
dasd_erplog_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
unsigned int val; |
|
int rc; |
|
|
|
if (kstrtouint(buf, 0, &val) || val > 1) |
|
return -EINVAL; |
|
|
|
rc = dasd_set_feature(to_ccwdev(dev), DASD_FEATURE_ERPLOG, val); |
|
|
|
return rc ? : count; |
|
} |
|
|
|
static DEVICE_ATTR(erplog, 0644, dasd_erplog_show, dasd_erplog_store); |
|
|
|
/* |
|
* use_diag controls whether the driver should use diag rather than ssch |
|
* to talk to the device |
|
*/ |
|
static ssize_t |
|
dasd_use_diag_show(struct device *dev, struct device_attribute *attr, char *buf) |
|
{ |
|
struct dasd_devmap *devmap; |
|
int use_diag; |
|
|
|
devmap = dasd_find_busid(dev_name(dev)); |
|
if (!IS_ERR(devmap)) |
|
use_diag = (devmap->features & DASD_FEATURE_USEDIAG) != 0; |
|
else |
|
use_diag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_USEDIAG) != 0; |
|
return sprintf(buf, use_diag ? "1\n" : "0\n"); |
|
} |
|
|
|
static ssize_t |
|
dasd_use_diag_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct dasd_devmap *devmap; |
|
unsigned int val; |
|
ssize_t rc; |
|
|
|
devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(devmap)) |
|
return PTR_ERR(devmap); |
|
|
|
if (kstrtouint(buf, 0, &val) || val > 1) |
|
return -EINVAL; |
|
|
|
spin_lock(&dasd_devmap_lock); |
|
/* Changing diag discipline flag is only allowed in offline state. */ |
|
rc = count; |
|
if (!devmap->device && !(devmap->features & DASD_FEATURE_USERAW)) { |
|
if (val) |
|
devmap->features |= DASD_FEATURE_USEDIAG; |
|
else |
|
devmap->features &= ~DASD_FEATURE_USEDIAG; |
|
} else |
|
rc = -EPERM; |
|
spin_unlock(&dasd_devmap_lock); |
|
return rc; |
|
} |
|
|
|
static DEVICE_ATTR(use_diag, 0644, dasd_use_diag_show, dasd_use_diag_store); |
|
|
|
/* |
|
* use_raw controls whether the driver should give access to raw eckd data or |
|
* operate in standard mode |
|
*/ |
|
static ssize_t |
|
dasd_use_raw_show(struct device *dev, struct device_attribute *attr, char *buf) |
|
{ |
|
struct dasd_devmap *devmap; |
|
int use_raw; |
|
|
|
devmap = dasd_find_busid(dev_name(dev)); |
|
if (!IS_ERR(devmap)) |
|
use_raw = (devmap->features & DASD_FEATURE_USERAW) != 0; |
|
else |
|
use_raw = (DASD_FEATURE_DEFAULT & DASD_FEATURE_USERAW) != 0; |
|
return sprintf(buf, use_raw ? "1\n" : "0\n"); |
|
} |
|
|
|
static ssize_t |
|
dasd_use_raw_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct dasd_devmap *devmap; |
|
ssize_t rc; |
|
unsigned long val; |
|
|
|
devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(devmap)) |
|
return PTR_ERR(devmap); |
|
|
|
if ((kstrtoul(buf, 10, &val) != 0) || val > 1) |
|
return -EINVAL; |
|
|
|
spin_lock(&dasd_devmap_lock); |
|
/* Changing diag discipline flag is only allowed in offline state. */ |
|
rc = count; |
|
if (!devmap->device && !(devmap->features & DASD_FEATURE_USEDIAG)) { |
|
if (val) |
|
devmap->features |= DASD_FEATURE_USERAW; |
|
else |
|
devmap->features &= ~DASD_FEATURE_USERAW; |
|
} else |
|
rc = -EPERM; |
|
spin_unlock(&dasd_devmap_lock); |
|
return rc; |
|
} |
|
|
|
static DEVICE_ATTR(raw_track_access, 0644, dasd_use_raw_show, |
|
dasd_use_raw_store); |
|
|
|
static ssize_t |
|
dasd_safe_offline_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct ccw_device *cdev = to_ccwdev(dev); |
|
struct dasd_device *device; |
|
unsigned long flags; |
|
int rc; |
|
|
|
spin_lock_irqsave(get_ccwdev_lock(cdev), flags); |
|
device = dasd_device_from_cdev_locked(cdev); |
|
if (IS_ERR(device)) { |
|
rc = PTR_ERR(device); |
|
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
|
goto out; |
|
} |
|
|
|
if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || |
|
test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) { |
|
/* Already doing offline processing */ |
|
dasd_put_device(device); |
|
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
|
rc = -EBUSY; |
|
goto out; |
|
} |
|
|
|
set_bit(DASD_FLAG_SAFE_OFFLINE, &device->flags); |
|
dasd_put_device(device); |
|
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
|
|
|
rc = ccw_device_set_offline(cdev); |
|
|
|
out: |
|
return rc ? rc : count; |
|
} |
|
|
|
static DEVICE_ATTR(safe_offline, 0200, NULL, dasd_safe_offline_store); |
|
|
|
static ssize_t |
|
dasd_access_show(struct device *dev, struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct ccw_device *cdev = to_ccwdev(dev); |
|
struct dasd_device *device; |
|
int count; |
|
|
|
device = dasd_device_from_cdev(cdev); |
|
if (IS_ERR(device)) |
|
return PTR_ERR(device); |
|
|
|
if (!device->discipline) |
|
count = -ENODEV; |
|
else if (!device->discipline->host_access_count) |
|
count = -EOPNOTSUPP; |
|
else |
|
count = device->discipline->host_access_count(device); |
|
|
|
dasd_put_device(device); |
|
if (count < 0) |
|
return count; |
|
|
|
return sprintf(buf, "%d\n", count); |
|
} |
|
|
|
static DEVICE_ATTR(host_access_count, 0444, dasd_access_show, NULL); |
|
|
|
static ssize_t |
|
dasd_discipline_show(struct device *dev, struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct dasd_device *device; |
|
ssize_t len; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
goto out; |
|
else if (!device->discipline) { |
|
dasd_put_device(device); |
|
goto out; |
|
} else { |
|
len = snprintf(buf, PAGE_SIZE, "%s\n", |
|
device->discipline->name); |
|
dasd_put_device(device); |
|
return len; |
|
} |
|
out: |
|
len = snprintf(buf, PAGE_SIZE, "none\n"); |
|
return len; |
|
} |
|
|
|
static DEVICE_ATTR(discipline, 0444, dasd_discipline_show, NULL); |
|
|
|
static ssize_t |
|
dasd_device_status_show(struct device *dev, struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct dasd_device *device; |
|
ssize_t len; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (!IS_ERR(device)) { |
|
switch (device->state) { |
|
case DASD_STATE_NEW: |
|
len = snprintf(buf, PAGE_SIZE, "new\n"); |
|
break; |
|
case DASD_STATE_KNOWN: |
|
len = snprintf(buf, PAGE_SIZE, "detected\n"); |
|
break; |
|
case DASD_STATE_BASIC: |
|
len = snprintf(buf, PAGE_SIZE, "basic\n"); |
|
break; |
|
case DASD_STATE_UNFMT: |
|
len = snprintf(buf, PAGE_SIZE, "unformatted\n"); |
|
break; |
|
case DASD_STATE_READY: |
|
len = snprintf(buf, PAGE_SIZE, "ready\n"); |
|
break; |
|
case DASD_STATE_ONLINE: |
|
len = snprintf(buf, PAGE_SIZE, "online\n"); |
|
break; |
|
default: |
|
len = snprintf(buf, PAGE_SIZE, "no stat\n"); |
|
break; |
|
} |
|
dasd_put_device(device); |
|
} else |
|
len = snprintf(buf, PAGE_SIZE, "unknown\n"); |
|
return len; |
|
} |
|
|
|
static DEVICE_ATTR(status, 0444, dasd_device_status_show, NULL); |
|
|
|
static ssize_t dasd_alias_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct dasd_device *device; |
|
struct dasd_uid uid; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return sprintf(buf, "0\n"); |
|
|
|
if (device->discipline && device->discipline->get_uid && |
|
!device->discipline->get_uid(device, &uid)) { |
|
if (uid.type == UA_BASE_PAV_ALIAS || |
|
uid.type == UA_HYPER_PAV_ALIAS) { |
|
dasd_put_device(device); |
|
return sprintf(buf, "1\n"); |
|
} |
|
} |
|
dasd_put_device(device); |
|
|
|
return sprintf(buf, "0\n"); |
|
} |
|
|
|
static DEVICE_ATTR(alias, 0444, dasd_alias_show, NULL); |
|
|
|
static ssize_t dasd_vendor_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct dasd_device *device; |
|
struct dasd_uid uid; |
|
char *vendor; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
vendor = ""; |
|
if (IS_ERR(device)) |
|
return snprintf(buf, PAGE_SIZE, "%s\n", vendor); |
|
|
|
if (device->discipline && device->discipline->get_uid && |
|
!device->discipline->get_uid(device, &uid)) |
|
vendor = uid.vendor; |
|
|
|
dasd_put_device(device); |
|
|
|
return snprintf(buf, PAGE_SIZE, "%s\n", vendor); |
|
} |
|
|
|
static DEVICE_ATTR(vendor, 0444, dasd_vendor_show, NULL); |
|
|
|
#define UID_STRLEN ( /* vendor */ 3 + 1 + /* serial */ 14 + 1 +\ |
|
/* SSID */ 4 + 1 + /* unit addr */ 2 + 1 +\ |
|
/* vduit */ 32 + 1) |
|
|
|
static ssize_t |
|
dasd_uid_show(struct device *dev, struct device_attribute *attr, char *buf) |
|
{ |
|
struct dasd_device *device; |
|
struct dasd_uid uid; |
|
char uid_string[UID_STRLEN]; |
|
char ua_string[3]; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
uid_string[0] = 0; |
|
if (IS_ERR(device)) |
|
return snprintf(buf, PAGE_SIZE, "%s\n", uid_string); |
|
|
|
if (device->discipline && device->discipline->get_uid && |
|
!device->discipline->get_uid(device, &uid)) { |
|
switch (uid.type) { |
|
case UA_BASE_DEVICE: |
|
snprintf(ua_string, sizeof(ua_string), "%02x", |
|
uid.real_unit_addr); |
|
break; |
|
case UA_BASE_PAV_ALIAS: |
|
snprintf(ua_string, sizeof(ua_string), "%02x", |
|
uid.base_unit_addr); |
|
break; |
|
case UA_HYPER_PAV_ALIAS: |
|
snprintf(ua_string, sizeof(ua_string), "xx"); |
|
break; |
|
default: |
|
/* should not happen, treat like base device */ |
|
snprintf(ua_string, sizeof(ua_string), "%02x", |
|
uid.real_unit_addr); |
|
break; |
|
} |
|
|
|
if (strlen(uid.vduit) > 0) |
|
snprintf(uid_string, sizeof(uid_string), |
|
"%s.%s.%04x.%s.%s", |
|
uid.vendor, uid.serial, uid.ssid, ua_string, |
|
uid.vduit); |
|
else |
|
snprintf(uid_string, sizeof(uid_string), |
|
"%s.%s.%04x.%s", |
|
uid.vendor, uid.serial, uid.ssid, ua_string); |
|
} |
|
dasd_put_device(device); |
|
|
|
return snprintf(buf, PAGE_SIZE, "%s\n", uid_string); |
|
} |
|
static DEVICE_ATTR(uid, 0444, dasd_uid_show, NULL); |
|
|
|
/* |
|
* extended error-reporting |
|
*/ |
|
static ssize_t |
|
dasd_eer_show(struct device *dev, struct device_attribute *attr, char *buf) |
|
{ |
|
struct dasd_devmap *devmap; |
|
int eer_flag; |
|
|
|
devmap = dasd_find_busid(dev_name(dev)); |
|
if (!IS_ERR(devmap) && devmap->device) |
|
eer_flag = dasd_eer_enabled(devmap->device); |
|
else |
|
eer_flag = 0; |
|
return snprintf(buf, PAGE_SIZE, eer_flag ? "1\n" : "0\n"); |
|
} |
|
|
|
static ssize_t |
|
dasd_eer_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct dasd_device *device; |
|
unsigned int val; |
|
int rc = 0; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return PTR_ERR(device); |
|
|
|
if (kstrtouint(buf, 0, &val) || val > 1) |
|
return -EINVAL; |
|
|
|
if (val) |
|
rc = dasd_eer_enable(device); |
|
else |
|
dasd_eer_disable(device); |
|
|
|
dasd_put_device(device); |
|
|
|
return rc ? : count; |
|
} |
|
|
|
static DEVICE_ATTR(eer_enabled, 0644, dasd_eer_show, dasd_eer_store); |
|
|
|
/* |
|
* expiration time for default requests |
|
*/ |
|
static ssize_t |
|
dasd_expires_show(struct device *dev, struct device_attribute *attr, char *buf) |
|
{ |
|
struct dasd_device *device; |
|
int len; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return -ENODEV; |
|
len = snprintf(buf, PAGE_SIZE, "%lu\n", device->default_expires); |
|
dasd_put_device(device); |
|
return len; |
|
} |
|
|
|
static ssize_t |
|
dasd_expires_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct dasd_device *device; |
|
unsigned long val; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return -ENODEV; |
|
|
|
if ((kstrtoul(buf, 10, &val) != 0) || |
|
(val > DASD_EXPIRES_MAX) || val == 0) { |
|
dasd_put_device(device); |
|
return -EINVAL; |
|
} |
|
|
|
if (val) |
|
device->default_expires = val; |
|
|
|
dasd_put_device(device); |
|
return count; |
|
} |
|
|
|
static DEVICE_ATTR(expires, 0644, dasd_expires_show, dasd_expires_store); |
|
|
|
static ssize_t |
|
dasd_retries_show(struct device *dev, struct device_attribute *attr, char *buf) |
|
{ |
|
struct dasd_device *device; |
|
int len; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return -ENODEV; |
|
len = snprintf(buf, PAGE_SIZE, "%lu\n", device->default_retries); |
|
dasd_put_device(device); |
|
return len; |
|
} |
|
|
|
static ssize_t |
|
dasd_retries_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct dasd_device *device; |
|
unsigned long val; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return -ENODEV; |
|
|
|
if ((kstrtoul(buf, 10, &val) != 0) || |
|
(val > DASD_RETRIES_MAX)) { |
|
dasd_put_device(device); |
|
return -EINVAL; |
|
} |
|
|
|
if (val) |
|
device->default_retries = val; |
|
|
|
dasd_put_device(device); |
|
return count; |
|
} |
|
|
|
static DEVICE_ATTR(retries, 0644, dasd_retries_show, dasd_retries_store); |
|
|
|
static ssize_t |
|
dasd_timeout_show(struct device *dev, struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct dasd_device *device; |
|
int len; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return -ENODEV; |
|
len = snprintf(buf, PAGE_SIZE, "%lu\n", device->blk_timeout); |
|
dasd_put_device(device); |
|
return len; |
|
} |
|
|
|
static ssize_t |
|
dasd_timeout_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct dasd_device *device; |
|
struct request_queue *q; |
|
unsigned long val; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device) || !device->block) |
|
return -ENODEV; |
|
|
|
if ((kstrtoul(buf, 10, &val) != 0) || |
|
val > UINT_MAX / HZ) { |
|
dasd_put_device(device); |
|
return -EINVAL; |
|
} |
|
q = device->block->request_queue; |
|
if (!q) { |
|
dasd_put_device(device); |
|
return -ENODEV; |
|
} |
|
|
|
device->blk_timeout = val; |
|
|
|
blk_queue_rq_timeout(q, device->blk_timeout * HZ); |
|
|
|
dasd_put_device(device); |
|
return count; |
|
} |
|
|
|
static DEVICE_ATTR(timeout, 0644, |
|
dasd_timeout_show, dasd_timeout_store); |
|
|
|
|
|
static ssize_t |
|
dasd_path_reset_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct dasd_device *device; |
|
unsigned int val; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return -ENODEV; |
|
|
|
if ((kstrtouint(buf, 16, &val) != 0) || val > 0xff) |
|
val = 0; |
|
|
|
if (device->discipline && device->discipline->reset_path) |
|
device->discipline->reset_path(device, (__u8) val); |
|
|
|
dasd_put_device(device); |
|
return count; |
|
} |
|
|
|
static DEVICE_ATTR(path_reset, 0200, NULL, dasd_path_reset_store); |
|
|
|
static ssize_t dasd_hpf_show(struct device *dev, struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct dasd_device *device; |
|
int hpf; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return -ENODEV; |
|
if (!device->discipline || !device->discipline->hpf_enabled) { |
|
dasd_put_device(device); |
|
return snprintf(buf, PAGE_SIZE, "%d\n", dasd_nofcx); |
|
} |
|
hpf = device->discipline->hpf_enabled(device); |
|
dasd_put_device(device); |
|
return snprintf(buf, PAGE_SIZE, "%d\n", hpf); |
|
} |
|
|
|
static DEVICE_ATTR(hpf, 0444, dasd_hpf_show, NULL); |
|
|
|
static ssize_t dasd_reservation_policy_show(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct dasd_devmap *devmap; |
|
int rc = 0; |
|
|
|
devmap = dasd_find_busid(dev_name(dev)); |
|
if (IS_ERR(devmap)) { |
|
rc = snprintf(buf, PAGE_SIZE, "ignore\n"); |
|
} else { |
|
spin_lock(&dasd_devmap_lock); |
|
if (devmap->features & DASD_FEATURE_FAILONSLCK) |
|
rc = snprintf(buf, PAGE_SIZE, "fail\n"); |
|
else |
|
rc = snprintf(buf, PAGE_SIZE, "ignore\n"); |
|
spin_unlock(&dasd_devmap_lock); |
|
} |
|
return rc; |
|
} |
|
|
|
static ssize_t dasd_reservation_policy_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct ccw_device *cdev = to_ccwdev(dev); |
|
int rc; |
|
|
|
if (sysfs_streq("ignore", buf)) |
|
rc = dasd_set_feature(cdev, DASD_FEATURE_FAILONSLCK, 0); |
|
else if (sysfs_streq("fail", buf)) |
|
rc = dasd_set_feature(cdev, DASD_FEATURE_FAILONSLCK, 1); |
|
else |
|
rc = -EINVAL; |
|
|
|
return rc ? : count; |
|
} |
|
|
|
static DEVICE_ATTR(reservation_policy, 0644, |
|
dasd_reservation_policy_show, dasd_reservation_policy_store); |
|
|
|
static ssize_t dasd_reservation_state_show(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct dasd_device *device; |
|
int rc = 0; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return snprintf(buf, PAGE_SIZE, "none\n"); |
|
|
|
if (test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) |
|
rc = snprintf(buf, PAGE_SIZE, "reserved\n"); |
|
else if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags)) |
|
rc = snprintf(buf, PAGE_SIZE, "lost\n"); |
|
else |
|
rc = snprintf(buf, PAGE_SIZE, "none\n"); |
|
dasd_put_device(device); |
|
return rc; |
|
} |
|
|
|
static ssize_t dasd_reservation_state_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct dasd_device *device; |
|
int rc = 0; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return -ENODEV; |
|
if (sysfs_streq("reset", buf)) |
|
clear_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); |
|
else |
|
rc = -EINVAL; |
|
dasd_put_device(device); |
|
|
|
if (rc) |
|
return rc; |
|
else |
|
return count; |
|
} |
|
|
|
static DEVICE_ATTR(last_known_reservation_state, 0644, |
|
dasd_reservation_state_show, dasd_reservation_state_store); |
|
|
|
static ssize_t dasd_pm_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct dasd_device *device; |
|
u8 opm, nppm, cablepm, cuirpm, hpfpm, ifccpm; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return sprintf(buf, "0\n"); |
|
|
|
opm = dasd_path_get_opm(device); |
|
nppm = dasd_path_get_nppm(device); |
|
cablepm = dasd_path_get_cablepm(device); |
|
cuirpm = dasd_path_get_cuirpm(device); |
|
hpfpm = dasd_path_get_hpfpm(device); |
|
ifccpm = dasd_path_get_ifccpm(device); |
|
dasd_put_device(device); |
|
|
|
return sprintf(buf, "%02x %02x %02x %02x %02x %02x\n", opm, nppm, |
|
cablepm, cuirpm, hpfpm, ifccpm); |
|
} |
|
|
|
static DEVICE_ATTR(path_masks, 0444, dasd_pm_show, NULL); |
|
|
|
/* |
|
* threshold value for IFCC/CCC errors |
|
*/ |
|
static ssize_t |
|
dasd_path_threshold_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct dasd_device *device; |
|
int len; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return -ENODEV; |
|
len = snprintf(buf, PAGE_SIZE, "%lu\n", device->path_thrhld); |
|
dasd_put_device(device); |
|
return len; |
|
} |
|
|
|
static ssize_t |
|
dasd_path_threshold_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct dasd_device *device; |
|
unsigned long flags; |
|
unsigned long val; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return -ENODEV; |
|
|
|
if (kstrtoul(buf, 10, &val) != 0 || val > DASD_THRHLD_MAX) { |
|
dasd_put_device(device); |
|
return -EINVAL; |
|
} |
|
spin_lock_irqsave(get_ccwdev_lock(to_ccwdev(dev)), flags); |
|
device->path_thrhld = val; |
|
spin_unlock_irqrestore(get_ccwdev_lock(to_ccwdev(dev)), flags); |
|
dasd_put_device(device); |
|
return count; |
|
} |
|
static DEVICE_ATTR(path_threshold, 0644, dasd_path_threshold_show, |
|
dasd_path_threshold_store); |
|
|
|
/* |
|
* configure if path is disabled after IFCC/CCC error threshold is |
|
* exceeded |
|
*/ |
|
static ssize_t |
|
dasd_path_autodisable_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct dasd_devmap *devmap; |
|
int flag; |
|
|
|
devmap = dasd_find_busid(dev_name(dev)); |
|
if (!IS_ERR(devmap)) |
|
flag = (devmap->features & DASD_FEATURE_PATH_AUTODISABLE) != 0; |
|
else |
|
flag = (DASD_FEATURE_DEFAULT & |
|
DASD_FEATURE_PATH_AUTODISABLE) != 0; |
|
return snprintf(buf, PAGE_SIZE, flag ? "1\n" : "0\n"); |
|
} |
|
|
|
static ssize_t |
|
dasd_path_autodisable_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
unsigned int val; |
|
int rc; |
|
|
|
if (kstrtouint(buf, 0, &val) || val > 1) |
|
return -EINVAL; |
|
|
|
rc = dasd_set_feature(to_ccwdev(dev), |
|
DASD_FEATURE_PATH_AUTODISABLE, val); |
|
|
|
return rc ? : count; |
|
} |
|
|
|
static DEVICE_ATTR(path_autodisable, 0644, |
|
dasd_path_autodisable_show, |
|
dasd_path_autodisable_store); |
|
/* |
|
* interval for IFCC/CCC checks |
|
* meaning time with no IFCC/CCC error before the error counter |
|
* gets reset |
|
*/ |
|
static ssize_t |
|
dasd_path_interval_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct dasd_device *device; |
|
int len; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return -ENODEV; |
|
len = snprintf(buf, PAGE_SIZE, "%lu\n", device->path_interval); |
|
dasd_put_device(device); |
|
return len; |
|
} |
|
|
|
static ssize_t |
|
dasd_path_interval_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct dasd_device *device; |
|
unsigned long flags; |
|
unsigned long val; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return -ENODEV; |
|
|
|
if ((kstrtoul(buf, 10, &val) != 0) || |
|
(val > DASD_INTERVAL_MAX) || val == 0) { |
|
dasd_put_device(device); |
|
return -EINVAL; |
|
} |
|
spin_lock_irqsave(get_ccwdev_lock(to_ccwdev(dev)), flags); |
|
if (val) |
|
device->path_interval = val; |
|
spin_unlock_irqrestore(get_ccwdev_lock(to_ccwdev(dev)), flags); |
|
dasd_put_device(device); |
|
return count; |
|
} |
|
|
|
static DEVICE_ATTR(path_interval, 0644, dasd_path_interval_show, |
|
dasd_path_interval_store); |
|
|
|
static ssize_t |
|
dasd_device_fcs_show(struct device *dev, struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct dasd_device *device; |
|
int fc_sec; |
|
int rc; |
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev)); |
|
if (IS_ERR(device)) |
|
return -ENODEV; |
|
fc_sec = dasd_path_get_fcs_device(device); |
|
if (fc_sec == -EINVAL) |
|
rc = snprintf(buf, PAGE_SIZE, "Inconsistent\n"); |
|
else |
|
rc = snprintf(buf, PAGE_SIZE, "%s\n", dasd_path_get_fcs_str(fc_sec)); |
|
dasd_put_device(device); |
|
|
|
return rc; |
|
} |
|
static DEVICE_ATTR(fc_security, 0444, dasd_device_fcs_show, NULL); |
|
|
|
static ssize_t |
|
dasd_path_fcs_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) |
|
{ |
|
struct dasd_path *path = to_dasd_path(kobj); |
|
unsigned int fc_sec = path->fc_security; |
|
|
|
return snprintf(buf, PAGE_SIZE, "%s\n", dasd_path_get_fcs_str(fc_sec)); |
|
} |
|
|
|
static struct kobj_attribute path_fcs_attribute = |
|
__ATTR(fc_security, 0444, dasd_path_fcs_show, NULL); |
|
|
|
#define DASD_DEFINE_ATTR(_name, _func) \ |
|
static ssize_t dasd_##_name##_show(struct device *dev, \ |
|
struct device_attribute *attr, \ |
|
char *buf) \ |
|
{ \ |
|
struct ccw_device *cdev = to_ccwdev(dev); \ |
|
struct dasd_device *device = dasd_device_from_cdev(cdev); \ |
|
int val = 0; \ |
|
\ |
|
if (IS_ERR(device)) \ |
|
return -ENODEV; \ |
|
if (device->discipline && _func) \ |
|
val = _func(device); \ |
|
dasd_put_device(device); \ |
|
\ |
|
return snprintf(buf, PAGE_SIZE, "%d\n", val); \ |
|
} \ |
|
static DEVICE_ATTR(_name, 0444, dasd_##_name##_show, NULL); \ |
|
|
|
DASD_DEFINE_ATTR(ese, device->discipline->is_ese); |
|
DASD_DEFINE_ATTR(extent_size, device->discipline->ext_size); |
|
DASD_DEFINE_ATTR(pool_id, device->discipline->ext_pool_id); |
|
DASD_DEFINE_ATTR(space_configured, device->discipline->space_configured); |
|
DASD_DEFINE_ATTR(space_allocated, device->discipline->space_allocated); |
|
DASD_DEFINE_ATTR(logical_capacity, device->discipline->logical_capacity); |
|
DASD_DEFINE_ATTR(warn_threshold, device->discipline->ext_pool_warn_thrshld); |
|
DASD_DEFINE_ATTR(cap_at_warnlevel, device->discipline->ext_pool_cap_at_warnlevel); |
|
DASD_DEFINE_ATTR(pool_oos, device->discipline->ext_pool_oos); |
|
|
|
static struct attribute * dasd_attrs[] = { |
|
&dev_attr_readonly.attr, |
|
&dev_attr_discipline.attr, |
|
&dev_attr_status.attr, |
|
&dev_attr_alias.attr, |
|
&dev_attr_vendor.attr, |
|
&dev_attr_uid.attr, |
|
&dev_attr_use_diag.attr, |
|
&dev_attr_raw_track_access.attr, |
|
&dev_attr_eer_enabled.attr, |
|
&dev_attr_erplog.attr, |
|
&dev_attr_failfast.attr, |
|
&dev_attr_expires.attr, |
|
&dev_attr_retries.attr, |
|
&dev_attr_timeout.attr, |
|
&dev_attr_reservation_policy.attr, |
|
&dev_attr_last_known_reservation_state.attr, |
|
&dev_attr_safe_offline.attr, |
|
&dev_attr_host_access_count.attr, |
|
&dev_attr_path_masks.attr, |
|
&dev_attr_path_threshold.attr, |
|
&dev_attr_path_autodisable.attr, |
|
&dev_attr_path_interval.attr, |
|
&dev_attr_path_reset.attr, |
|
&dev_attr_hpf.attr, |
|
&dev_attr_ese.attr, |
|
&dev_attr_fc_security.attr, |
|
NULL, |
|
}; |
|
|
|
static const struct attribute_group dasd_attr_group = { |
|
.attrs = dasd_attrs, |
|
}; |
|
|
|
static struct attribute *capacity_attrs[] = { |
|
&dev_attr_space_configured.attr, |
|
&dev_attr_space_allocated.attr, |
|
&dev_attr_logical_capacity.attr, |
|
NULL, |
|
}; |
|
|
|
static const struct attribute_group capacity_attr_group = { |
|
.name = "capacity", |
|
.attrs = capacity_attrs, |
|
}; |
|
|
|
static struct attribute *ext_pool_attrs[] = { |
|
&dev_attr_pool_id.attr, |
|
&dev_attr_extent_size.attr, |
|
&dev_attr_warn_threshold.attr, |
|
&dev_attr_cap_at_warnlevel.attr, |
|
&dev_attr_pool_oos.attr, |
|
NULL, |
|
}; |
|
|
|
static const struct attribute_group ext_pool_attr_group = { |
|
.name = "extent_pool", |
|
.attrs = ext_pool_attrs, |
|
}; |
|
|
|
static const struct attribute_group *dasd_attr_groups[] = { |
|
&dasd_attr_group, |
|
&capacity_attr_group, |
|
&ext_pool_attr_group, |
|
NULL, |
|
}; |
|
|
|
/* |
|
* Return value of the specified feature. |
|
*/ |
|
int |
|
dasd_get_feature(struct ccw_device *cdev, int feature) |
|
{ |
|
struct dasd_devmap *devmap; |
|
|
|
devmap = dasd_find_busid(dev_name(&cdev->dev)); |
|
if (IS_ERR(devmap)) |
|
return PTR_ERR(devmap); |
|
|
|
return ((devmap->features & feature) != 0); |
|
} |
|
|
|
/* |
|
* Set / reset given feature. |
|
* Flag indicates whether to set (!=0) or the reset (=0) the feature. |
|
*/ |
|
int |
|
dasd_set_feature(struct ccw_device *cdev, int feature, int flag) |
|
{ |
|
struct dasd_devmap *devmap; |
|
|
|
devmap = dasd_devmap_from_cdev(cdev); |
|
if (IS_ERR(devmap)) |
|
return PTR_ERR(devmap); |
|
|
|
spin_lock(&dasd_devmap_lock); |
|
if (flag) |
|
devmap->features |= feature; |
|
else |
|
devmap->features &= ~feature; |
|
if (devmap->device) |
|
devmap->device->features = devmap->features; |
|
spin_unlock(&dasd_devmap_lock); |
|
return 0; |
|
} |
|
EXPORT_SYMBOL(dasd_set_feature); |
|
|
|
static struct attribute *paths_info_attrs[] = { |
|
&path_fcs_attribute.attr, |
|
NULL, |
|
}; |
|
|
|
static struct kobj_type path_attr_type = { |
|
.release = dasd_path_release, |
|
.default_attrs = paths_info_attrs, |
|
.sysfs_ops = &kobj_sysfs_ops, |
|
}; |
|
|
|
static void dasd_path_init_kobj(struct dasd_device *device, int chp) |
|
{ |
|
device->path[chp].kobj.kset = device->paths_info; |
|
kobject_init(&device->path[chp].kobj, &path_attr_type); |
|
} |
|
|
|
void dasd_path_create_kobj(struct dasd_device *device, int chp) |
|
{ |
|
int rc; |
|
|
|
if (test_bit(DASD_FLAG_OFFLINE, &device->flags)) |
|
return; |
|
if (!device->paths_info) { |
|
dev_warn(&device->cdev->dev, "Unable to create paths objects\n"); |
|
return; |
|
} |
|
if (device->path[chp].in_sysfs) |
|
return; |
|
if (!device->path[chp].conf_data) |
|
return; |
|
|
|
dasd_path_init_kobj(device, chp); |
|
|
|
rc = kobject_add(&device->path[chp].kobj, NULL, "%x.%02x", |
|
device->path[chp].cssid, device->path[chp].chpid); |
|
if (rc) |
|
kobject_put(&device->path[chp].kobj); |
|
device->path[chp].in_sysfs = true; |
|
} |
|
EXPORT_SYMBOL(dasd_path_create_kobj); |
|
|
|
void dasd_path_create_kobjects(struct dasd_device *device) |
|
{ |
|
u8 lpm, opm; |
|
|
|
opm = dasd_path_get_opm(device); |
|
for (lpm = 0x80; lpm; lpm >>= 1) { |
|
if (!(lpm & opm)) |
|
continue; |
|
dasd_path_create_kobj(device, pathmask_to_pos(lpm)); |
|
} |
|
} |
|
EXPORT_SYMBOL(dasd_path_create_kobjects); |
|
|
|
static void dasd_path_remove_kobj(struct dasd_device *device, int chp) |
|
{ |
|
if (device->path[chp].in_sysfs) { |
|
kobject_put(&device->path[chp].kobj); |
|
device->path[chp].in_sysfs = false; |
|
} |
|
} |
|
|
|
/* |
|
* As we keep kobjects for the lifetime of a device, this function must not be |
|
* called anywhere but in the context of offlining a device. |
|
*/ |
|
void dasd_path_remove_kobjects(struct dasd_device *device) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < 8; i++) |
|
dasd_path_remove_kobj(device, i); |
|
} |
|
EXPORT_SYMBOL(dasd_path_remove_kobjects); |
|
|
|
int dasd_add_sysfs_files(struct ccw_device *cdev) |
|
{ |
|
return sysfs_create_groups(&cdev->dev.kobj, dasd_attr_groups); |
|
} |
|
|
|
void |
|
dasd_remove_sysfs_files(struct ccw_device *cdev) |
|
{ |
|
sysfs_remove_groups(&cdev->dev.kobj, dasd_attr_groups); |
|
} |
|
|
|
|
|
int |
|
dasd_devmap_init(void) |
|
{ |
|
int i; |
|
|
|
/* Initialize devmap structures. */ |
|
dasd_max_devindex = 0; |
|
for (i = 0; i < 256; i++) |
|
INIT_LIST_HEAD(&dasd_hashlists[i]); |
|
return 0; |
|
} |
|
|
|
void |
|
dasd_devmap_exit(void) |
|
{ |
|
dasd_forget_ranges(); |
|
}
|
|
|