hpsa: honor queue depth of physical devices
When using the ioaccel submission methods, requests destined for RAID volumes
are sometimes diverted to physical devices. The OS has no or limited
knowledge of these physical devices, so it is up to the driver to avoid
pushing the device too hard. It is better to honor the physical device queue
limit rather than making the device spew zillions of TASK SET FULL responses.
This is so that hpsa based devices support /sys/block/sdNN/device/queue_type
of simple, which lets the SCSI midlayer automatically adjust the queue_depth
based on TASK SET FULL and GOOD status.
Adjust the queue depth for a new device after it is created based on the
maximum queue depths of the physical devices that constitute the
device. This drops the maximum queue depth from .can_queue of 1024 to
something like 174 for single-drive RAID-0, 348 for two-drive RAID-1, etc.
It also adjusts for the ratio of data to parity drives.
Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Signed-off-by: Webb Scales <webbnh@hp.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/drivers/scsi/hpsa_cmd.h b/drivers/scsi/hpsa_cmd.h
index 3f2f0af..4726dbb 100644
--- a/drivers/scsi/hpsa_cmd.h
+++ b/drivers/scsi/hpsa_cmd.h
@@ -240,6 +240,10 @@
struct ext_report_lun_entry {
u8 lunid[8];
+#define GET_BMIC_BUS(lunid) ((lunid)[7] & 0x3F)
+#define GET_BMIC_LEVEL_TWO_TARGET(lunid) ((lunid)[6])
+#define GET_BMIC_DRIVE_NUMBER(lunid) (((GET_BMIC_BUS((lunid)) - 1) << 8) + \
+ GET_BMIC_LEVEL_TWO_TARGET((lunid)))
u8 wwid[8];
u8 device_type;
u8 device_flags;
@@ -268,6 +272,7 @@
#define HPSA_CACHE_FLUSH 0x01 /* C2 was already being used by HPSA */
#define BMIC_FLASH_FIRMWARE 0xF7
#define BMIC_SENSE_CONTROLLER_PARAMETERS 0x64
+#define BMIC_IDENTIFY_PHYSICAL_DEVICE 0x15
/* Command List Structure */
union SCSI3Addr {
@@ -405,6 +410,17 @@
struct completion *waiting;
void *scsi_cmd;
struct work_struct work;
+
+ /*
+ * For commands using either of the two "ioaccel" paths to
+ * bypass the RAID stack and go directly to the physical disk
+ * phys_disk is a pointer to the hpsa_scsi_dev_t to which the
+ * i/o is destined. We need to store that here because the command
+ * may potentially encounter TASK SET FULL and need to be resubmitted
+ * For "normal" i/o's not using the "ioaccel" paths, phys_disk is
+ * not used.
+ */
+ struct hpsa_scsi_dev_t *phys_disk;
} __aligned(COMMANDLIST_ALIGNMENT);
/* Max S/G elements in I/O accelerator command */
@@ -641,5 +657,137 @@
u32 board_id;
};
+struct bmic_identify_physical_device {
+ u8 scsi_bus; /* SCSI Bus number on controller */
+ u8 scsi_id; /* SCSI ID on this bus */
+ __le16 block_size; /* sector size in bytes */
+ __le32 total_blocks; /* number for sectors on drive */
+ __le32 reserved_blocks; /* controller reserved (RIS) */
+ u8 model[40]; /* Physical Drive Model */
+ u8 serial_number[40]; /* Drive Serial Number */
+ u8 firmware_revision[8]; /* drive firmware revision */
+ u8 scsi_inquiry_bits; /* inquiry byte 7 bits */
+ u8 compaq_drive_stamp; /* 0 means drive not stamped */
+ u8 last_failure_reason;
+#define BMIC_LAST_FAILURE_TOO_SMALL_IN_LOAD_CONFIG 0x01
+#define BMIC_LAST_FAILURE_ERROR_ERASING_RIS 0x02
+#define BMIC_LAST_FAILURE_ERROR_SAVING_RIS 0x03
+#define BMIC_LAST_FAILURE_FAIL_DRIVE_COMMAND 0x04
+#define BMIC_LAST_FAILURE_MARK_BAD_FAILED 0x05
+#define BMIC_LAST_FAILURE_MARK_BAD_FAILED_IN_FINISH_REMAP 0x06
+#define BMIC_LAST_FAILURE_TIMEOUT 0x07
+#define BMIC_LAST_FAILURE_AUTOSENSE_FAILED 0x08
+#define BMIC_LAST_FAILURE_MEDIUM_ERROR_1 0x09
+#define BMIC_LAST_FAILURE_MEDIUM_ERROR_2 0x0a
+#define BMIC_LAST_FAILURE_NOT_READY_BAD_SENSE 0x0b
+#define BMIC_LAST_FAILURE_NOT_READY 0x0c
+#define BMIC_LAST_FAILURE_HARDWARE_ERROR 0x0d
+#define BMIC_LAST_FAILURE_ABORTED_COMMAND 0x0e
+#define BMIC_LAST_FAILURE_WRITE_PROTECTED 0x0f
+#define BMIC_LAST_FAILURE_SPIN_UP_FAILURE_IN_RECOVER 0x10
+#define BMIC_LAST_FAILURE_REBUILD_WRITE_ERROR 0x11
+#define BMIC_LAST_FAILURE_TOO_SMALL_IN_HOT_PLUG 0x12
+#define BMIC_LAST_FAILURE_BUS_RESET_RECOVERY_ABORTED 0x13
+#define BMIC_LAST_FAILURE_REMOVED_IN_HOT_PLUG 0x14
+#define BMIC_LAST_FAILURE_INIT_REQUEST_SENSE_FAILED 0x15
+#define BMIC_LAST_FAILURE_INIT_START_UNIT_FAILED 0x16
+#define BMIC_LAST_FAILURE_INQUIRY_FAILED 0x17
+#define BMIC_LAST_FAILURE_NON_DISK_DEVICE 0x18
+#define BMIC_LAST_FAILURE_READ_CAPACITY_FAILED 0x19
+#define BMIC_LAST_FAILURE_INVALID_BLOCK_SIZE 0x1a
+#define BMIC_LAST_FAILURE_HOT_PLUG_REQUEST_SENSE_FAILED 0x1b
+#define BMIC_LAST_FAILURE_HOT_PLUG_START_UNIT_FAILED 0x1c
+#define BMIC_LAST_FAILURE_WRITE_ERROR_AFTER_REMAP 0x1d
+#define BMIC_LAST_FAILURE_INIT_RESET_RECOVERY_ABORTED 0x1e
+#define BMIC_LAST_FAILURE_DEFERRED_WRITE_ERROR 0x1f
+#define BMIC_LAST_FAILURE_MISSING_IN_SAVE_RIS 0x20
+#define BMIC_LAST_FAILURE_WRONG_REPLACE 0x21
+#define BMIC_LAST_FAILURE_GDP_VPD_INQUIRY_FAILED 0x22
+#define BMIC_LAST_FAILURE_GDP_MODE_SENSE_FAILED 0x23
+#define BMIC_LAST_FAILURE_DRIVE_NOT_IN_48BIT_MODE 0x24
+#define BMIC_LAST_FAILURE_DRIVE_TYPE_MIX_IN_HOT_PLUG 0x25
+#define BMIC_LAST_FAILURE_DRIVE_TYPE_MIX_IN_LOAD_CFG 0x26
+#define BMIC_LAST_FAILURE_PROTOCOL_ADAPTER_FAILED 0x27
+#define BMIC_LAST_FAILURE_FAULTY_ID_BAY_EMPTY 0x28
+#define BMIC_LAST_FAILURE_FAULTY_ID_BAY_OCCUPIED 0x29
+#define BMIC_LAST_FAILURE_FAULTY_ID_INVALID_BAY 0x2a
+#define BMIC_LAST_FAILURE_WRITE_RETRIES_FAILED 0x2b
+
+#define BMIC_LAST_FAILURE_SMART_ERROR_REPORTED 0x37
+#define BMIC_LAST_FAILURE_PHY_RESET_FAILED 0x38
+#define BMIC_LAST_FAILURE_ONLY_ONE_CTLR_CAN_SEE_DRIVE 0x40
+#define BMIC_LAST_FAILURE_KC_VOLUME_FAILED 0x41
+#define BMIC_LAST_FAILURE_UNEXPECTED_REPLACEMENT 0x42
+#define BMIC_LAST_FAILURE_OFFLINE_ERASE 0x80
+#define BMIC_LAST_FAILURE_OFFLINE_TOO_SMALL 0x81
+#define BMIC_LAST_FAILURE_OFFLINE_DRIVE_TYPE_MIX 0x82
+#define BMIC_LAST_FAILURE_OFFLINE_ERASE_COMPLETE 0x83
+
+ u8 flags;
+ u8 more_flags;
+ u8 scsi_lun; /* SCSI LUN for phys drive */
+ u8 yet_more_flags;
+ u8 even_more_flags;
+ __le32 spi_speed_rules;/* SPI Speed data:Ultra disable diagnose */
+ u8 phys_connector[2]; /* connector number on controller */
+ u8 phys_box_on_bus; /* phys enclosure this drive resides */
+ u8 phys_bay_in_box; /* phys drv bay this drive resides */
+ __le32 rpm; /* Drive rotational speed in rpm */
+ u8 device_type; /* type of drive */
+ u8 sata_version; /* only valid when drive_type is SATA */
+ __le64 big_total_block_count;
+ __le64 ris_starting_lba;
+ __le32 ris_size;
+ u8 wwid[20];
+ u8 controller_phy_map[32];
+ __le16 phy_count;
+ u8 phy_connected_dev_type[256];
+ u8 phy_to_drive_bay_num[256];
+ __le16 phy_to_attached_dev_index[256];
+ u8 box_index;
+ u8 reserved;
+ __le16 extra_physical_drive_flags;
+#define BMIC_PHYS_DRIVE_SUPPORTS_GAS_GAUGE(idphydrv) \
+ (idphydrv->extra_physical_drive_flags & (1 << 10))
+ u8 negotiated_link_rate[256];
+ u8 phy_to_phy_map[256];
+ u8 redundant_path_present_map;
+ u8 redundant_path_failure_map;
+ u8 active_path_number;
+ __le16 alternate_paths_phys_connector[8];
+ u8 alternate_paths_phys_box_on_port[8];
+ u8 multi_lun_device_lun_count;
+ u8 minimum_good_fw_revision[8];
+ u8 unique_inquiry_bytes[20];
+ u8 current_temperature_degreesC;
+ u8 temperature_threshold_degreesC;
+ u8 max_temperature_degreesC;
+ u8 logical_blocks_per_phys_block_exp; /* phyblocksize = 512*2^exp */
+ __le16 current_queue_depth_limit;
+ u8 switch_name[10];
+ __le16 switch_port;
+ u8 alternate_paths_switch_name[40];
+ u8 alternate_paths_switch_port[8];
+ __le16 power_on_hours; /* valid only if gas gauge supported */
+ __le16 percent_endurance_used; /* valid only if gas gauge supported. */
+#define BMIC_PHYS_DRIVE_SSD_WEAROUT(idphydrv) \
+ ((idphydrv->percent_endurance_used & 0x80) || \
+ (idphydrv->percent_endurance_used > 10000))
+ u8 drive_authentication;
+#define BMIC_PHYS_DRIVE_AUTHENTICATED(idphydrv) \
+ (idphydrv->drive_authentication == 0x80)
+ u8 smart_carrier_authentication;
+#define BMIC_SMART_CARRIER_AUTHENTICATION_SUPPORTED(idphydrv) \
+ (idphydrv->smart_carrier_authentication != 0x0)
+#define BMIC_SMART_CARRIER_AUTHENTICATED(idphydrv) \
+ (idphydrv->smart_carrier_authentication == 0x01)
+ u8 smart_carrier_app_fw_version;
+ u8 smart_carrier_bootloader_fw_version;
+ u8 encryption_key_name[64];
+ __le32 misc_drive_flags;
+ __le16 dek_index;
+ u8 padding[112];
+};
+
#pragma pack()
#endif /* HPSA_CMD_H */