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[SCSI] hpsa: add ioaccell mode 1 RAID offload support.

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This enables sending i/o's destined for RAID logical drives
which can be serviced by a single physical disk down a different,
faster i/o path directly to physical drives for certain logical
volumes on SSDs bypassing the Smart Array RAID stack for a
performance improvement.

Signed-off-by: Matt Gates <matthew.gates@hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Scott Teel <scott.teel@hp.com>
Signed-off-by: Mike Miller <michael.miller@canonical.com>
Signed-off-by: Don Brace <brace@beardog.cce.hp.com>
Signed-off-by: Joe Handzik <joseph.t.handzik@hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Stephen M. Cameron
2014-02-18 13:55:33 -06:00
committed by James Bottomley
parent 17eb87d216
commit 283b4a9b98
3 changed files with 607 additions and 49 deletions
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65
drivers/scsi/hpsa_cmd.h
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@@ -42,6 +42,8 @@
#define CMD_UNSOLICITED_ABORT 0x000A
#define CMD_TIMEOUT 0x000B
#define CMD_UNABORTABLE 0x000C
#define CMD_IOACCEL_DISABLED 0x000E
/* Unit Attentions ASC's as defined for the MSA2012sa */
#define POWER_OR_RESET 0x29
@@ -137,6 +139,11 @@
#define CFGTBL_BusType_Ultra3 0x00000002l
#define CFGTBL_BusType_Fibre1G 0x00000100l
#define CFGTBL_BusType_Fibre2G 0x00000200l
/* VPD Inquiry types */
#define HPSA_VPD_LV_DEVICE_GEOMETRY 0xC1
#define HPSA_VPD_LV_IOACCEL_STATUS 0xC2
struct vals32 {
u32 lower;
u32 upper;
@@ -165,9 +172,46 @@ struct InquiryData {
#define HPSA_REPORT_LOG 0xc2 /* Report Logical LUNs */
#define HPSA_REPORT_PHYS 0xc3 /* Report Physical LUNs */
#define HPSA_REPORT_PHYS_EXTENDED 0x02
#define HPSA_CISS_READ 0xc0 /* CISS Read */
#define HPSA_GET_RAID_MAP 0xc8 /* CISS Get RAID Layout Map */
#define RAID_MAP_MAX_ENTRIES 256
struct raid_map_disk_data {
u32 ioaccel_handle; /**< Handle to access this disk via the
* I/O accelerator */
u8 xor_mult[2]; /**< XOR multipliers for this position,
* valid for data disks only */
u8 reserved[2];
};
struct raid_map_data {
u32 structure_size; /* Size of entire structure in bytes */
u32 volume_blk_size; /* bytes / block in the volume */
u64 volume_blk_cnt; /* logical blocks on the volume */
u8 phys_blk_shift; /* Shift factor to convert between
* units of logical blocks and physical
* disk blocks */
u8 parity_rotation_shift; /* Shift factor to convert between units
* of logical stripes and physical
* stripes */
u16 strip_size; /* blocks used on each disk / stripe */
u64 disk_starting_blk; /* First disk block used in volume */
u64 disk_blk_cnt; /* disk blocks used by volume / disk */
u16 data_disks_per_row; /* data disk entries / row in the map */
u16 metadata_disks_per_row; /* mirror/parity disk entries / row
* in the map */
u16 row_cnt; /* rows in each layout map */
u16 layout_map_count; /* layout maps (1 map per mirror/parity
* group) */
u8 reserved[20];
struct raid_map_disk_data data[RAID_MAP_MAX_ENTRIES];
};
struct ReportLUNdata {
u8 LUNListLength[4];
u32 reserved;
u8 extended_response_flag;
u8 reserved[3];
u8 LUN[HPSA_MAX_LUN][8];
};
@@ -331,7 +375,7 @@ struct CommandList {
*/
#define IS_32_BIT ((8 - sizeof(long))/4)
#define IS_64_BIT (!IS_32_BIT)
#define PAD_32 (4)
#define PAD_32 (36)
#define PAD_64 (4)
#define COMMANDLIST_PAD (IS_32_BIT * PAD_32 + IS_64_BIT * PAD_64)
u8 pad[COMMANDLIST_PAD];
@@ -371,6 +415,11 @@ struct io_accel1_cmd {
struct vals32 host_addr; /* 0x70 - 0x77 */
u8 CISS_LUN[8]; /* 0x78 - 0x7F */
struct SGDescriptor SG[IOACCEL1_MAXSGENTRIES];
#define IOACCEL1_PAD_64 0
#define IOACCEL1_PAD_32 0
#define IOACCEL1_PAD (IS_32_BIT * IOACCEL1_PAD_32 + \
IS_64_BIT * IOACCEL1_PAD_64)
u8 pad[IOACCEL1_PAD];
};
#define IOACCEL1_FUNCTION_SCSIIO 0x00
@@ -407,6 +456,8 @@ struct HostWrite {
#define MEMQ_MODE 0x08
#define IOACCEL_MODE_1 0x80
#define DRIVER_SUPPORT_UA_ENABLE 0x00000001
struct CfgTable {
u8 Signature[4];
u32 SpecValence;
@@ -435,8 +486,16 @@ struct CfgTable {
u32 misc_fw_support; /* offset 0x78 */
#define MISC_FW_DOORBELL_RESET (0x02)
#define MISC_FW_DOORBELL_RESET2 (0x010)
#define MISC_FW_RAID_OFFLOAD_BASIC (0x020)
#define MISC_FW_EVENT_NOTIFY (0x080)
u8 driver_version[32];
u32 max_cached_write_size;
u8 driver_scratchpad[16];
u32 max_error_info_length;
u32 io_accel_max_embedded_sg_count;
u32 io_accel_request_size_offset;
u32 event_notify;
u32 clear_event_notify;
};
#define NUM_BLOCKFETCH_ENTRIES 8