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Diffstat (limited to 'include/scsi/scsi_host.h')
-rw-r--r--include/scsi/scsi_host.h99
1 files changed, 92 insertions, 7 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index c50a97fc76f..94844fc77b9 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -6,6 +6,7 @@
#include <linux/types.h>
#include <linux/workqueue.h>
#include <linux/mutex.h>
+#include <linux/seq_file.h>
#include <scsi/scsi.h>
struct request_queue;
@@ -14,6 +15,7 @@ struct completion;
struct module;
struct scsi_cmnd;
struct scsi_device;
+struct scsi_host_cmd_pool;
struct scsi_target;
struct Scsi_Host;
struct scsi_host_cmd_pool;
@@ -46,7 +48,7 @@ struct blk_queue_tags;
enum {
SCSI_QDEPTH_DEFAULT, /* default requested change, e.g. from sysfs */
SCSI_QDEPTH_QFULL, /* scsi-ml requested due to queue full */
- SCSI_QDEPTH_RAMP_UP, /* scsi-ml requested due to threshhold event */
+ SCSI_QDEPTH_RAMP_UP, /* scsi-ml requested due to threshold event */
};
struct scsi_host_template {
@@ -127,8 +129,7 @@ struct scsi_host_template {
*
* STATUS: REQUIRED
*/
- int (* queuecommand)(struct scsi_cmnd *,
- void (*done)(struct scsi_cmnd *));
+ int (* queuecommand)(struct Scsi_Host *, struct scsi_cmnd *);
/*
* The transfer functions are used to queue a scsi command to
@@ -327,13 +328,22 @@ struct scsi_host_template {
sector_t, int []);
/*
+ * This function is called when one or more partitions on the
+ * device reach beyond the end of the device.
+ *
+ * Status: OPTIONAL
+ */
+ void (*unlock_native_capacity)(struct scsi_device *);
+
+ /*
* Can be used to export driver statistics and other infos to the
* world outside the kernel ie. userspace and it also provides an
* interface to feed the driver with information.
*
* Status: OBSOLETE
*/
- int (*proc_info)(struct Scsi_Host *, char *, char **, off_t, int, int);
+ int (*show_info)(struct seq_file *, struct Scsi_Host *);
+ int (*write_info)(struct Scsi_Host *, char *, int);
/*
* This is an optional routine that allows the transport to become
@@ -348,6 +358,19 @@ struct scsi_host_template {
*/
enum blk_eh_timer_return (*eh_timed_out)(struct scsi_cmnd *);
+ /* This is an optional routine that allows transport to initiate
+ * LLD adapter or firmware reset using sysfs attribute.
+ *
+ * Return values: 0 on success, -ve value on failure.
+ *
+ * Status: OPTIONAL
+ */
+
+ int (*host_reset)(struct Scsi_Host *shost, int reset_type);
+#define SCSI_ADAPTER_RESET 1
+#define SCSI_FIRMWARE_RESET 2
+
+
/*
* Name of proc directory
*/
@@ -355,7 +378,7 @@ struct scsi_host_template {
/*
* Used to store the procfs directory if a driver implements the
- * proc_info method.
+ * show_info method.
*/
struct proc_dir_entry *proc_dir;
@@ -380,6 +403,7 @@ struct scsi_host_template {
* of scatter-gather.
*/
unsigned short sg_tablesize;
+ unsigned short sg_prot_tablesize;
/*
* Set this if the host adapter has limitations beside segment count.
@@ -452,6 +476,14 @@ struct scsi_host_template {
*/
unsigned ordered_tag:1;
+ /* True if the controller does not support WRITE SAME */
+ unsigned no_write_same:1;
+
+ /*
+ * True if asynchronous aborts are not supported
+ */
+ unsigned no_async_abort:1;
+
/*
* Countdown for host blocking with no commands outstanding.
*/
@@ -493,9 +525,34 @@ struct scsi_host_template {
* scsi_netlink.h
*/
u64 vendor_id;
+
+ /*
+ * Additional per-command data allocated for the driver.
+ */
+ unsigned int cmd_size;
+ struct scsi_host_cmd_pool *cmd_pool;
};
/*
+ * Temporary #define for host lock push down. Can be removed when all
+ * drivers have been updated to take advantage of unlocked
+ * queuecommand.
+ *
+ */
+#define DEF_SCSI_QCMD(func_name) \
+ int func_name(struct Scsi_Host *shost, struct scsi_cmnd *cmd) \
+ { \
+ unsigned long irq_flags; \
+ int rc; \
+ spin_lock_irqsave(shost->host_lock, irq_flags); \
+ scsi_cmd_get_serial(shost, cmd); \
+ rc = func_name##_lck (cmd, cmd->scsi_done); \
+ spin_unlock_irqrestore(shost->host_lock, irq_flags); \
+ return rc; \
+ }
+
+
+/*
* shost state: If you alter this, you also need to alter scsi_sysfs.c
* (for the ascii descriptions) and the state model enforcer:
* scsi_host_set_state()
@@ -556,9 +613,12 @@ struct Scsi_Host {
unsigned int host_eh_scheduled; /* EH scheduled without command */
unsigned int host_no; /* Used for IOCTL_GET_IDLUN, /proc/scsi et al. */
- int resetting; /* if set, it means that last_reset is a valid value */
+
+ /* next two fields are used to bound the time spent in error handling */
+ int eh_deadline;
unsigned long last_reset;
+
/*
* These three parameters can be used to allow for wide scsi,
* and for host adapters that support multiple busses
@@ -591,6 +651,7 @@ struct Scsi_Host {
int can_queue;
short cmd_per_lun;
short unsigned int sg_tablesize;
+ short unsigned int sg_prot_tablesize;
short unsigned int max_sectors;
unsigned long dma_boundary;
/*
@@ -628,6 +689,12 @@ struct Scsi_Host {
/* Asynchronous scan in progress */
unsigned async_scan:1;
+ /* Don't resume host in EH */
+ unsigned eh_noresume:1;
+
+ /* The controller does not support WRITE SAME */
+ unsigned no_write_same:1;
+
/*
* Optional work queue to be utilized by the transport
*/
@@ -635,6 +702,11 @@ struct Scsi_Host {
struct workqueue_struct *work_q;
/*
+ * Task management function work queue
+ */
+ struct workqueue_struct *tmf_work_q;
+
+ /*
* Host has rejected a command because it was busy.
*/
unsigned int host_blocked;
@@ -742,6 +814,7 @@ extern struct Scsi_Host *scsi_host_get(struct Scsi_Host *);
extern void scsi_host_put(struct Scsi_Host *t);
extern struct Scsi_Host *scsi_host_lookup(unsigned short);
extern const char *scsi_host_state_name(enum scsi_host_state);
+extern void scsi_cmd_get_serial(struct Scsi_Host *, struct scsi_cmnd *);
extern u64 scsi_calculate_bounce_limit(struct Scsi_Host *);
@@ -762,7 +835,8 @@ static inline struct device *scsi_get_device(struct Scsi_Host *shost)
**/
static inline int scsi_host_scan_allowed(struct Scsi_Host *shost)
{
- return shost->shost_state == SHOST_RUNNING;
+ return shost->shost_state == SHOST_RUNNING ||
+ shost->shost_state == SHOST_RECOVERY;
}
extern void scsi_unblock_requests(struct Scsi_Host *);
@@ -815,6 +889,11 @@ static inline unsigned int scsi_host_get_prot(struct Scsi_Host *shost)
return shost->prot_capabilities;
}
+static inline int scsi_host_prot_dma(struct Scsi_Host *shost)
+{
+ return shost->prot_capabilities >= SHOST_DIX_TYPE0_PROTECTION;
+}
+
static inline unsigned int scsi_host_dif_capable(struct Scsi_Host *shost, unsigned int target_type)
{
static unsigned char cap[] = { 0,
@@ -822,6 +901,9 @@ static inline unsigned int scsi_host_dif_capable(struct Scsi_Host *shost, unsign
SHOST_DIF_TYPE2_PROTECTION,
SHOST_DIF_TYPE3_PROTECTION };
+ if (target_type >= ARRAY_SIZE(cap))
+ return 0;
+
return shost->prot_capabilities & cap[target_type] ? target_type : 0;
}
@@ -833,6 +915,9 @@ static inline unsigned int scsi_host_dix_capable(struct Scsi_Host *shost, unsign
SHOST_DIX_TYPE2_PROTECTION,
SHOST_DIX_TYPE3_PROTECTION };
+ if (target_type >= ARRAY_SIZE(cap))
+ return 0;
+
return shost->prot_capabilities & cap[target_type];
#endif
return 0;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-12 15:56:15 +0000