diff options
Diffstat (limited to 'include/scsi/scsi_device.h')
| -rw-r--r-- | include/scsi/scsi_device.h | 67 |
1 files changed, 61 insertions, 6 deletions
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index 5ec1e71a09de..68dd49947d04 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -100,10 +100,6 @@ struct scsi_vpd { unsigned char data[]; }; -enum scsi_vpd_parameters { - SCSI_VPD_HEADER_SIZE = 4, -}; - struct scsi_device { struct Scsi_Host *host; struct request_queue *request_queue; @@ -153,12 +149,13 @@ struct scsi_device { struct scsi_vpd __rcu *vpd_pgb0; struct scsi_vpd __rcu *vpd_pgb1; struct scsi_vpd __rcu *vpd_pgb2; + struct scsi_vpd __rcu *vpd_pgb7; struct scsi_target *sdev_target; blist_flags_t sdev_bflags; /* black/white flags as also found in * scsi_devinfo.[hc]. For now used only to - * pass settings from slave_alloc to scsi + * pass settings from sdev_init to scsi * core. */ unsigned int eh_timeout; /* Error handling timeout */ @@ -208,6 +205,7 @@ struct scsi_device { unsigned use_10_for_rw:1; /* first try 10-byte read / write */ unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */ unsigned set_dbd_for_ms:1; /* Set "DBD" field in mode sense */ + unsigned read_before_ms:1; /* perform a READ before MODE SENSE */ unsigned no_report_opcodes:1; /* no REPORT SUPPORTED OPERATION CODES */ unsigned no_write_same:1; /* no WRITE SAME command */ unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */ @@ -249,6 +247,9 @@ struct scsi_device { unsigned int queue_stopped; /* request queue is quiesced */ bool offline_already; /* Device offline message logged */ + unsigned int ua_new_media_ctr; /* Counter for New Media UNIT ATTENTIONs */ + unsigned int ua_por_ctr; /* Counter for Power On / Reset UAs */ + atomic_t disk_events_disable_depth; /* disable depth for disk events */ DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */ @@ -359,7 +360,7 @@ struct scsi_target { atomic_t target_blocked; /* - * LLDs should set this in the slave_alloc host template callout. + * LLDs should set this in the sdev_init host template callout. * If set to zero then there is not limit. */ unsigned int can_queue; @@ -489,6 +490,52 @@ extern int scsi_is_sdev_device(const struct device *); extern int scsi_is_target_device(const struct device *); extern void scsi_sanitize_inquiry_string(unsigned char *s, int len); +/* + * scsi_execute_cmd users can set scsi_failure.result to have + * scsi_check_passthrough fail/retry a command. scsi_failure.result can be a + * specific host byte or message code, or SCMD_FAILURE_RESULT_ANY can be used + * to match any host or message code. + */ +#define SCMD_FAILURE_RESULT_ANY 0x7fffffff +/* + * Set scsi_failure.result to SCMD_FAILURE_STAT_ANY to fail/retry any failure + * scsi_status_is_good returns false for. + */ +#define SCMD_FAILURE_STAT_ANY 0xff +/* + * The following can be set to the scsi_failure sense, asc and ascq fields to + * match on any sense, ASC, or ASCQ value. + */ +#define SCMD_FAILURE_SENSE_ANY 0xff +#define SCMD_FAILURE_ASC_ANY 0xff +#define SCMD_FAILURE_ASCQ_ANY 0xff +/* Always retry a matching failure. */ +#define SCMD_FAILURE_NO_LIMIT -1 + +struct scsi_failure { + int result; + u8 sense; + u8 asc; + u8 ascq; + /* + * Number of times scsi_execute_cmd will retry the failure. It does + * not count for the total_allowed. + */ + s8 allowed; + /* Number of times the failure has been retried. */ + s8 retries; +}; + +struct scsi_failures { + /* + * If a scsi_failure does not have a retry limit setup this limit will + * be used. + */ + int total_allowed; + int total_retries; + struct scsi_failure *failure_definitions; +}; + /* Optional arguments to scsi_execute_cmd */ struct scsi_exec_args { unsigned char *sense; /* sense buffer */ @@ -497,12 +544,14 @@ struct scsi_exec_args { blk_mq_req_flags_t req_flags; /* BLK_MQ_REQ flags */ int scmd_flags; /* SCMD flags */ int *resid; /* residual length */ + struct scsi_failures *failures; /* failures to retry */ }; int scsi_execute_cmd(struct scsi_device *sdev, const unsigned char *cmd, blk_opf_t opf, void *buffer, unsigned int bufflen, int timeout, int retries, const struct scsi_exec_args *args); +void scsi_failures_reset_retries(struct scsi_failures *failures); extern void sdev_disable_disk_events(struct scsi_device *sdev); extern void sdev_enable_disk_events(struct scsi_device *sdev); @@ -638,6 +687,12 @@ static inline int scsi_device_busy(struct scsi_device *sdev) return sbitmap_weight(&sdev->budget_map); } +/* Macros to access the UNIT ATTENTION counters */ +#define scsi_get_ua_new_media_ctr(sdev) \ + ((const unsigned int)(sdev->ua_new_media_ctr)) +#define scsi_get_ua_por_ctr(sdev) \ + ((const unsigned int)(sdev->ua_por_ctr)) + #define MODULE_ALIAS_SCSI_DEVICE(type) \ MODULE_ALIAS("scsi:t-" __stringify(type) "*") #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x" |