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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _SCSI_SCSI_DEVICE_H
2#define _SCSI_SCSI_DEVICE_H
3
4#include <linux/device.h>
5#include <linux/list.h>
6#include <linux/spinlock.h>
James Bottomleyffedb452006-02-23 14:27:18 -06007#include <linux/workqueue.h>
Martin K. Petersena4d04a42007-02-27 22:40:27 -05008#include <linux/blkdev.h>
Hugh Dickinsd211f052008-08-06 18:21:18 +01009#include <scsi/scsi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <asm/atomic.h>
11
12struct request_queue;
13struct scsi_cmnd;
James Bottomleye10fb912005-07-14 11:54:17 -050014struct scsi_lun;
James Bottomleyea73a9f2005-08-28 11:33:52 -050015struct scsi_sense_hdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
James Bottomley1cf72692005-08-28 11:27:01 -050017struct scsi_mode_data {
18 __u32 length;
19 __u16 block_descriptor_length;
20 __u8 medium_type;
21 __u8 device_specific;
22 __u8 header_length;
23 __u8 longlba:1;
24};
25
Linus Torvalds1da177e2005-04-16 15:20:36 -070026/*
27 * sdev state: If you alter this, you also need to alter scsi_sysfs.c
28 * (for the ascii descriptions) and the state model enforcer:
29 * scsi_lib:scsi_device_set_state().
30 */
31enum scsi_device_state {
32 SDEV_CREATED = 1, /* device created but not added to sysfs
33 * Only internal commands allowed (for inq) */
34 SDEV_RUNNING, /* device properly configured
35 * All commands allowed */
36 SDEV_CANCEL, /* beginning to delete device
37 * Only error handler commands allowed */
38 SDEV_DEL, /* device deleted
39 * no commands allowed */
40 SDEV_QUIESCE, /* Device quiescent. No block commands
41 * will be accepted, only specials (which
42 * originate in the mid-layer) */
43 SDEV_OFFLINE, /* Device offlined (by error handling or
44 * user request */
James Bottomley6f4267e2008-08-22 16:53:31 -050045 SDEV_BLOCK, /* Device blocked by scsi lld. No
46 * scsi commands from user or midlayer
47 * should be issued to the scsi
48 * lld. */
49 SDEV_CREATED_BLOCK, /* same as above but for created devices */
Linus Torvalds1da177e2005-04-16 15:20:36 -070050};
51
Jeff Garzika341cd02007-10-29 17:15:22 -040052enum scsi_device_event {
53 SDEV_EVT_MEDIA_CHANGE = 1, /* media has changed */
54
55 SDEV_EVT_LAST = SDEV_EVT_MEDIA_CHANGE,
56 SDEV_EVT_MAXBITS = SDEV_EVT_LAST + 1
57};
58
59struct scsi_event {
60 enum scsi_device_event evt_type;
61 struct list_head node;
62
63 /* put union of data structures, for non-simple event types,
64 * here
65 */
66};
67
Linus Torvalds1da177e2005-04-16 15:20:36 -070068struct scsi_device {
69 struct Scsi_Host *host;
70 struct request_queue *request_queue;
71
72 /* the next two are protected by the host->host_lock */
73 struct list_head siblings; /* list of all devices on this host */
74 struct list_head same_target_siblings; /* just the devices sharing same target id */
75
c2a93312005-04-12 16:38:09 -050076 /* this is now protected by the request_queue->queue_lock */
06f81ea2005-04-17 14:57:29 -050077 unsigned int device_busy; /* commands actually active on
78 * low-level. protected by queue_lock. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 spinlock_t list_lock;
80 struct list_head cmd_list; /* queue of in use SCSI Command structures */
81 struct list_head starved_entry;
82 struct scsi_cmnd *current_cmnd; /* currently active command */
83 unsigned short queue_depth; /* How deep of a queue we want */
84 unsigned short last_queue_full_depth; /* These two are used by */
85 unsigned short last_queue_full_count; /* scsi_track_queue_full() */
86 unsigned long last_queue_full_time;/* don't let QUEUE_FULLs on the same
87 jiffie count on our counter, they
88 could all be from the same event. */
89
90 unsigned int id, lun, channel;
91
92 unsigned int manufacturer; /* Manufacturer of device, for using
93 * vendor-specific cmd's */
94 unsigned sector_size; /* size in bytes */
95
96 void *hostdata; /* available to low-level driver */
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 char type;
98 char scsi_level;
99 char inq_periph_qual; /* PQ from INQUIRY data */
100 unsigned char inquiry_len; /* valid bytes in 'inquiry' */
101 unsigned char * inquiry; /* INQUIRY response data */
James Bottomley7f23e142005-12-01 12:50:13 -0600102 const char * vendor; /* [back_compat] point into 'inquiry' ... */
103 const char * model; /* ... after scan; point to static string */
104 const char * rev; /* ... "nullnullnullnull" before scan */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 unsigned char current_tag; /* current tag */
106 struct scsi_target *sdev_target; /* used only for single_lun */
107
108 unsigned int sdev_bflags; /* black/white flags as also found in
109 * scsi_devinfo.[hc]. For now used only to
110 * pass settings from slave_alloc to scsi
111 * core. */
112 unsigned writeable:1;
113 unsigned removable:1;
114 unsigned changed:1; /* Data invalid due to media change */
115 unsigned busy:1; /* Used to prevent races */
116 unsigned lockable:1; /* Able to prevent media removal */
117 unsigned locked:1; /* Media removal disabled */
118 unsigned borken:1; /* Tell the Seagate driver to be
119 * painfully slow on this device */
120 unsigned disconnect:1; /* can disconnect */
121 unsigned soft_reset:1; /* Uses soft reset option */
122 unsigned sdtr:1; /* Device supports SDTR messages */
123 unsigned wdtr:1; /* Device supports WDTR messages */
124 unsigned ppr:1; /* Device supports PPR messages */
125 unsigned tagged_supported:1; /* Supports SCSI-II tagged queuing */
126 unsigned simple_tags:1; /* simple queue tag messages are enabled */
127 unsigned ordered_tags:1;/* ordered queue tag messages are enabled */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 unsigned was_reset:1; /* There was a bus reset on the bus for
129 * this device */
130 unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN
131 * because we did a bus reset. */
132 unsigned use_10_for_rw:1; /* first try 10-byte read / write */
133 unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */
134 unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 */
135 unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f */
136 unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */
137 unsigned no_start_on_add:1; /* do not issue start on add */
138 unsigned allow_restart:1; /* issue START_UNIT in error handler */
Tejun Heoc3c94c52007-03-21 00:13:59 +0900139 unsigned manage_start_stop:1; /* Let HLD (sd) manage start/stop */
Stefan Richterd2886ea2008-05-11 00:34:07 +0200140 unsigned start_stop_pwr_cond:1; /* Set power cond. in START_STOP_UNIT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 unsigned no_uld_attach:1; /* disable connecting to upper level drivers */
142 unsigned select_no_atn:1;
143 unsigned fix_capacity:1; /* READ_CAPACITY is too high by 1 */
Oliver Neukum61bf54b2007-02-08 09:04:48 +0100144 unsigned guess_capacity:1; /* READ_CAPACITY might be too high by 1 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 unsigned retry_hwerror:1; /* Retry HARDWARE_ERROR */
Linus Torvalds18351072008-08-05 21:42:21 -0700146 unsigned last_sector_bug:1; /* do not use multisector accesses on
147 SD_LAST_BUGGY_SECTORS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
Jeff Garzika341cd02007-10-29 17:15:22 -0400149 DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */
150 struct list_head event_list; /* asserted events */
151 struct work_struct event_work;
152
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 unsigned int device_blocked; /* Device returned QUEUE_FULL. */
154
155 unsigned int max_device_blocked; /* what device_blocked counts down from */
156#define SCSI_DEFAULT_DEVICE_BLOCKED 3
157
158 atomic_t iorequest_cnt;
159 atomic_t iodone_cnt;
160 atomic_t ioerr_cnt;
161
Tony Jonesee959b02008-02-22 00:13:36 +0100162 struct device sdev_gendev,
163 sdev_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
James Bottomleyffedb452006-02-23 14:27:18 -0600165 struct execute_work ew; /* used to get process context on put */
166
Chandra Seetharamana6a8d9f2008-05-01 14:49:46 -0700167 struct scsi_dh_data *scsi_dh_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 enum scsi_device_state sdev_state;
169 unsigned long sdev_data[0];
170} __attribute__((aligned(sizeof(unsigned long))));
Chandra Seetharamana6a8d9f2008-05-01 14:49:46 -0700171
Hannes Reinecke765cbc62008-07-17 16:52:51 -0700172struct scsi_dh_devlist {
173 char *vendor;
174 char *model;
175};
176
Chandra Seetharamana6a8d9f2008-05-01 14:49:46 -0700177struct scsi_device_handler {
178 /* Used by the infrastructure */
179 struct list_head list; /* list of scsi_device_handlers */
Chandra Seetharamana6a8d9f2008-05-01 14:49:46 -0700180
181 /* Filled by the hardware handler */
182 struct module *module;
183 const char *name;
Hannes Reinecke765cbc62008-07-17 16:52:51 -0700184 const struct scsi_dh_devlist *devlist;
Chandra Seetharamana6a8d9f2008-05-01 14:49:46 -0700185 int (*check_sense)(struct scsi_device *, struct scsi_sense_hdr *);
Hannes Reinecke765cbc62008-07-17 16:52:51 -0700186 int (*attach)(struct scsi_device *);
187 void (*detach)(struct scsi_device *);
Chandra Seetharamana6a8d9f2008-05-01 14:49:46 -0700188 int (*activate)(struct scsi_device *);
189 int (*prep_fn)(struct scsi_device *, struct request *);
Chandra Seetharaman18ee70c2009-08-03 12:42:33 -0700190 int (*set_params)(struct scsi_device *, const char *);
Chandra Seetharamana6a8d9f2008-05-01 14:49:46 -0700191};
192
193struct scsi_dh_data {
194 struct scsi_device_handler *scsi_dh;
Chandra Seetharaman6c10db72009-06-26 19:30:06 -0700195 struct scsi_device *sdev;
196 struct kref kref;
Chandra Seetharamana6a8d9f2008-05-01 14:49:46 -0700197 char buf[0];
198};
199
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200#define to_scsi_device(d) \
201 container_of(d, struct scsi_device, sdev_gendev)
202#define class_to_sdev(d) \
Tony Jonesee959b02008-02-22 00:13:36 +0100203 container_of(d, struct scsi_device, sdev_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204#define transport_class_to_sdev(class_dev) \
Tony Jonesee959b02008-02-22 00:13:36 +0100205 to_scsi_device(class_dev->parent)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
James Bottomley9ccfc752005-10-02 11:45:08 -0500207#define sdev_printk(prefix, sdev, fmt, a...) \
208 dev_printk(prefix, &(sdev)->sdev_gendev, fmt, ##a)
209
Martin K. Petersena4d04a42007-02-27 22:40:27 -0500210#define scmd_printk(prefix, scmd, fmt, a...) \
211 (scmd)->request->rq_disk ? \
212 sdev_printk(prefix, (scmd)->device, "[%s] " fmt, \
213 (scmd)->request->rq_disk->disk_name, ##a) : \
214 sdev_printk(prefix, (scmd)->device, fmt, ##a)
Jeff Garzik01d7b3b2005-10-24 18:03:34 -0400215
James Bottomleyffedb452006-02-23 14:27:18 -0600216enum scsi_target_state {
James Bottomley643eb2d2008-03-22 22:42:27 -0500217 STARGET_CREATED = 1,
218 STARGET_RUNNING,
James Bottomleyffedb452006-02-23 14:27:18 -0600219 STARGET_DEL,
220};
221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222/*
223 * scsi_target: representation of a scsi target, for now, this is only
224 * used for single_lun devices. If no one has active IO to the target,
225 * starget_sdev_user is NULL, else it points to the active sdev.
226 */
227struct scsi_target {
228 struct scsi_device *starget_sdev_user;
229 struct list_head siblings;
230 struct list_head devices;
231 struct device dev;
232 unsigned int reap_ref; /* protected by the host lock */
233 unsigned int channel;
234 unsigned int id; /* target id ... replace
235 * scsi_device.id eventually */
Alan Stern1bfc5d92006-02-09 15:26:18 -0500236 unsigned int create:1; /* signal that it needs to be added */
Tony Battersby25d7c362007-11-12 10:00:44 -0500237 unsigned int single_lun:1; /* Indicates we should only
238 * allow I/O to one of the luns
239 * for the device at a time. */
Alan Stern1bfc5d92006-02-09 15:26:18 -0500240 unsigned int pdt_1f_for_no_lun; /* PDT = 0x1f */
241 /* means no lun present */
Mike Christief0c0a372008-08-17 15:24:38 -0500242 /* commands actually active on LLD. protected by host lock. */
243 unsigned int target_busy;
244 /*
245 * LLDs should set this in the slave_alloc host template callout.
246 * If set to zero then there is not limit.
247 */
248 unsigned int can_queue;
249 unsigned int target_blocked;
250 unsigned int max_target_blocked;
251#define SCSI_DEFAULT_TARGET_BLOCKED 3
Alan Stern1bfc5d92006-02-09 15:26:18 -0500252
James Bottomley6f3a2022005-09-22 20:33:28 -0500253 char scsi_level;
James Bottomleyffedb452006-02-23 14:27:18 -0600254 struct execute_work ew;
255 enum scsi_target_state state;
James Bottomleya283bd32005-05-24 12:06:38 -0500256 void *hostdata; /* available to low-level driver */
257 unsigned long starget_data[0]; /* for the transport */
258 /* starget_data must be the last element!!!! */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259} __attribute__((aligned(sizeof(unsigned long))));
260
261#define to_scsi_target(d) container_of(d, struct scsi_target, dev)
262static inline struct scsi_target *scsi_target(struct scsi_device *sdev)
263{
264 return to_scsi_target(sdev->sdev_gendev.parent);
265}
266#define transport_class_to_starget(class_dev) \
Tony Jonesee959b02008-02-22 00:13:36 +0100267 to_scsi_target(class_dev->parent)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
James Bottomley9ccfc752005-10-02 11:45:08 -0500269#define starget_printk(prefix, starget, fmt, a...) \
270 dev_printk(prefix, &(starget)->dev, fmt, ##a)
271
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272extern struct scsi_device *__scsi_add_device(struct Scsi_Host *,
273 uint, uint, uint, void *hostdata);
James Bottomley146f7262005-09-10 12:44:09 -0500274extern int scsi_add_device(struct Scsi_Host *host, uint channel,
275 uint target, uint lun);
Chandra Seetharamana6a8d9f2008-05-01 14:49:46 -0700276extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277extern void scsi_remove_device(struct scsi_device *);
Chandra Seetharamana6a8d9f2008-05-01 14:49:46 -0700278extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
280extern int scsi_device_get(struct scsi_device *);
281extern void scsi_device_put(struct scsi_device *);
282extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *,
283 uint, uint, uint);
284extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *,
285 uint, uint, uint);
286extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *,
287 uint);
288extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *,
289 uint);
290extern void starget_for_each_device(struct scsi_target *, void *,
291 void (*fn)(struct scsi_device *, void *));
Maciej W. Rozycki522939d2007-12-10 15:49:31 -0800292extern void __starget_for_each_device(struct scsi_target *, void *,
293 void (*fn)(struct scsi_device *,
294 void *));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
296/* only exposed to implement shost_for_each_device */
297extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *,
298 struct scsi_device *);
299
300/**
Matthew Wilcox3e082a92006-09-28 15:19:20 -0600301 * shost_for_each_device - iterate over all devices of a host
302 * @sdev: the &struct scsi_device to use as a cursor
303 * @shost: the &struct scsi_host to iterate over
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 *
Matthew Wilcox3e082a92006-09-28 15:19:20 -0600305 * Iterator that returns each device attached to @shost. This loop
306 * takes a reference on each device and releases it at the end. If
307 * you break out of the loop, you must call scsi_device_put(sdev).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 */
309#define shost_for_each_device(sdev, shost) \
310 for ((sdev) = __scsi_iterate_devices((shost), NULL); \
311 (sdev); \
312 (sdev) = __scsi_iterate_devices((shost), (sdev)))
313
314/**
Matthew Wilcox3e082a92006-09-28 15:19:20 -0600315 * __shost_for_each_device - iterate over all devices of a host (UNLOCKED)
316 * @sdev: the &struct scsi_device to use as a cursor
317 * @shost: the &struct scsi_host to iterate over
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 *
Matthew Wilcox3e082a92006-09-28 15:19:20 -0600319 * Iterator that returns each device attached to @shost. It does _not_
320 * take a reference on the scsi_device, so the whole loop must be
321 * protected by shost->host_lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 *
Matthew Wilcox3e082a92006-09-28 15:19:20 -0600323 * Note: The only reason to use this is because you need to access the
324 * device list in interrupt context. Otherwise you really want to use
325 * shost_for_each_device instead.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 */
327#define __shost_for_each_device(sdev, shost) \
328 list_for_each_entry((sdev), &((shost)->__devices), siblings)
329
330extern void scsi_adjust_queue_depth(struct scsi_device *, int, int);
331extern int scsi_track_queue_full(struct scsi_device *, int);
332
333extern int scsi_set_medium_removal(struct scsi_device *, char);
334
335extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
336 unsigned char *buffer, int len, int timeout,
James Bottomley1cf72692005-08-28 11:27:01 -0500337 int retries, struct scsi_mode_data *data,
James Bottomleyea73a9f2005-08-28 11:33:52 -0500338 struct scsi_sense_hdr *);
James Bottomley5baba832006-03-18 14:10:35 -0600339extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp,
340 int modepage, unsigned char *buffer, int len,
341 int timeout, int retries,
342 struct scsi_mode_data *data,
343 struct scsi_sense_hdr *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout,
James Bottomley001aac22007-12-02 19:10:40 +0200345 int retries, struct scsi_sense_hdr *sshdr);
Matthew Wilcox881a2562008-12-31 13:12:46 -0500346extern unsigned char *scsi_get_vpd_page(struct scsi_device *, u8 page);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347extern int scsi_device_set_state(struct scsi_device *sdev,
348 enum scsi_device_state state);
Jeff Garzika341cd02007-10-29 17:15:22 -0400349extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type,
350 gfp_t gfpflags);
351extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt);
352extern void sdev_evt_send_simple(struct scsi_device *sdev,
353 enum scsi_device_event evt_type, gfp_t gfpflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354extern int scsi_device_quiesce(struct scsi_device *sdev);
355extern void scsi_device_resume(struct scsi_device *sdev);
356extern void scsi_target_quiesce(struct scsi_target *);
357extern void scsi_target_resume(struct scsi_target *);
358extern void scsi_scan_target(struct device *parent, unsigned int channel,
359 unsigned int id, unsigned int lun, int rescan);
360extern void scsi_target_reap(struct scsi_target *);
361extern void scsi_target_block(struct device *);
362extern void scsi_target_unblock(struct device *);
363extern void scsi_remove_target(struct device *);
James.Smart@Emulex.Com2f4701d2005-07-13 22:05:03 -0400364extern void int_to_scsilun(unsigned int, struct scsi_lun *);
Christof Schmitt462b7852007-06-19 10:25:30 +0200365extern int scsilun_to_int(struct scsi_lun *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366extern const char *scsi_device_state_name(enum scsi_device_state);
367extern int scsi_is_sdev_device(const struct device *);
368extern int scsi_is_target_device(const struct device *);
James Bottomley33aa6872005-08-28 11:31:14 -0500369extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
370 int data_direction, void *buffer, unsigned bufflen,
371 unsigned char *sense, int timeout, int retries,
FUJITA Tomonorif4f4e472008-12-04 14:24:39 +0900372 int flag, int *resid);
James Bottomleyea73a9f2005-08-28 11:33:52 -0500373extern int scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd,
374 int data_direction, void *buffer, unsigned bufflen,
FUJITA Tomonorif4f4e472008-12-04 14:24:39 +0900375 struct scsi_sense_hdr *, int timeout, int retries,
376 int *resid);
James Bottomley33aa6872005-08-28 11:31:14 -0500377
Andrew Mortoncb5d9e02006-09-30 21:23:44 -0400378static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev)
James Bottomleye28482c2006-03-14 14:24:55 -0600379{
Andrew Mortoncb5d9e02006-09-30 21:23:44 -0400380 return device_reprobe(&sdev->sdev_gendev);
James Bottomleye28482c2006-03-14 14:24:55 -0600381}
382
Jeff Garzik01d7b3b2005-10-24 18:03:34 -0400383static inline unsigned int sdev_channel(struct scsi_device *sdev)
384{
385 return sdev->channel;
386}
387
388static inline unsigned int sdev_id(struct scsi_device *sdev)
389{
390 return sdev->id;
391}
392
393#define scmd_id(scmd) sdev_id((scmd)->device)
394#define scmd_channel(scmd) sdev_channel((scmd)->device)
395
James Bottomley0f1d87a2008-08-22 16:43:59 -0500396/*
397 * checks for positions of the SCSI state machine
398 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399static inline int scsi_device_online(struct scsi_device *sdev)
400{
Hannes Reinecke0762a482009-01-12 09:28:55 +0100401 return (sdev->sdev_state != SDEV_OFFLINE &&
402 sdev->sdev_state != SDEV_DEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403}
James Bottomley0f1d87a2008-08-22 16:43:59 -0500404static inline int scsi_device_blocked(struct scsi_device *sdev)
405{
James Bottomley6f4267e2008-08-22 16:53:31 -0500406 return sdev->sdev_state == SDEV_BLOCK ||
407 sdev->sdev_state == SDEV_CREATED_BLOCK;
James Bottomley0f1d87a2008-08-22 16:43:59 -0500408}
409static inline int scsi_device_created(struct scsi_device *sdev)
410{
James Bottomley6f4267e2008-08-22 16:53:31 -0500411 return sdev->sdev_state == SDEV_CREATED ||
412 sdev->sdev_state == SDEV_CREATED_BLOCK;
James Bottomley0f1d87a2008-08-22 16:43:59 -0500413}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
415/* accessor functions for the SCSI parameters */
416static inline int scsi_device_sync(struct scsi_device *sdev)
417{
418 return sdev->sdtr;
419}
420static inline int scsi_device_wide(struct scsi_device *sdev)
421{
422 return sdev->wdtr;
423}
424static inline int scsi_device_dt(struct scsi_device *sdev)
425{
426 return sdev->ppr;
427}
428static inline int scsi_device_dt_only(struct scsi_device *sdev)
429{
430 if (sdev->inquiry_len < 57)
431 return 0;
432 return (sdev->inquiry[56] & 0x0c) == 0x04;
433}
434static inline int scsi_device_ius(struct scsi_device *sdev)
435{
436 if (sdev->inquiry_len < 57)
437 return 0;
438 return sdev->inquiry[56] & 0x01;
439}
440static inline int scsi_device_qas(struct scsi_device *sdev)
441{
442 if (sdev->inquiry_len < 57)
443 return 0;
444 return sdev->inquiry[56] & 0x02;
445}
James Bottomleyb30c2fc2008-01-20 09:09:40 -0600446static inline int scsi_device_enclosure(struct scsi_device *sdev)
447{
448 return sdev->inquiry[6] & (1<<6);
449}
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400450
Martin K. Petersen7027ad72008-07-17 17:08:48 -0400451static inline int scsi_device_protection(struct scsi_device *sdev)
452{
Hugh Dickinsd211f052008-08-06 18:21:18 +0100453 return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0);
Martin K. Petersen7027ad72008-07-17 17:08:48 -0400454}
455
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400456#define MODULE_ALIAS_SCSI_DEVICE(type) \
457 MODULE_ALIAS("scsi:t-" __stringify(type) "*")
458#define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x"
459
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460#endif /* _SCSI_SCSI_DEVICE_H */