diff options
| author | Scott Teel <scott.teel@hp.com> | 2014-02-18 13:57:31 -0600 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2014-03-15 10:19:08 -0700 |
| commit | dd0e19f3ceb87a768d09ea4726ee33961665bfbb (patch) | |
| tree | 6ff9bba8283523741b1df621f3a3b5ed011259ba /drivers/scsi/hpsa_cmd.h | |
| parent | 51c35139e1f93f3b33e6598afb972b720d7e898c (diff) | |
| download | linux-dd0e19f3ceb87a768d09ea4726ee33961665bfbb.tar.bz2 | |
[SCSI] hpsa: add controller base data-at-rest encryption compatibility ioaccel2
Add controller-based data-at-rest encryption compatibility
to ioaccel2 path (HP SSD Smart Path).
Encryption feature requires driver to supply additional fields
for encryption enable, tweak index, and data encryption key index
in the ioaccel2 request structure.
Encryption enable flag and data encryption key index come from
raid_map data structure from raid offload command.
During ioaccel2 submission, check device structure's raid map to see if
encryption is enabled for the device. If so, call new function below.
Add function set_encrypt_ioaccel2 to set encryption flag, data encryption key
index, and calculate tweak value from request's logical block address.
Signed-off-by: Scott Teel <scott.teel@hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/hpsa_cmd.h')
| -rw-r--r-- | drivers/scsi/hpsa_cmd.h | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/scsi/hpsa_cmd.h b/drivers/scsi/hpsa_cmd.h index 7768092f0891..eaa7fdaa2e9d 100644 --- a/drivers/scsi/hpsa_cmd.h +++ b/drivers/scsi/hpsa_cmd.h @@ -209,7 +209,10 @@ struct raid_map_data { u16 row_cnt; /* rows in each layout map */ u16 layout_map_count; /* layout maps (1 map per mirror/parity * group) */ - u8 reserved[20]; + u16 flags; /* Bit 0 set if encryption enabled */ +#define RAID_MAP_FLAG_ENCRYPT_ON 0x01 + u16 dekindex; /* Data encryption key index. */ + u8 reserved[16]; struct raid_map_disk_data data[RAID_MAP_MAX_ENTRIES]; }; @@ -502,11 +505,17 @@ struct io_accel2_scsi_response { */ struct io_accel2_cmd { u8 IU_type; /* IU Type */ - u8 direction; /* Transfer direction, 2 bits */ + u8 direction; /* direction, memtype, and encryption */ +#define IOACCEL2_DIRECTION_MASK 0x03 /* bits 0,1: direction */ +#define IOACCEL2_DIRECTION_MEMTYPE_MASK 0x04 /* bit 2: memtype source/dest */ + /* 0b=PCIe, 1b=DDR */ +#define IOACCEL2_DIRECTION_ENCRYPT_MASK 0x08 /* bit 3: encryption flag */ + /* 0=off, 1=on */ u8 reply_queue; /* Reply Queue ID */ u8 reserved1; /* Reserved */ u32 scsi_nexus; /* Device Handle */ - struct vals32 Tag; /* cciss tag */ + u32 Tag; /* cciss tag, lower 4 bytes only */ + u32 tweak_lower; /* Encryption tweak, lower 4 bytes */ u8 cdb[16]; /* SCSI Command Descriptor Block */ u8 cciss_lun[8]; /* 8 byte SCSI address */ u32 data_len; /* Total bytes to transfer */ @@ -514,10 +523,10 @@ struct io_accel2_cmd { #define IOACCEL2_PRIORITY_MASK 0x78 #define IOACCEL2_ATTR_MASK 0x07 u8 sg_count; /* Number of sg elements */ - u8 reserved3[2]; /* Reserved */ + u16 dekindex; /* Data encryption key index */ u64 err_ptr; /* Error Pointer */ u32 err_len; /* Error Length*/ - u8 reserved4[4]; /* Reserved */ + u32 tweak_upper; /* Encryption tweak, upper 4 bytes */ struct ioaccel2_sg_element sg[IOACCEL2_MAXSGENTRIES]; struct io_accel2_scsi_response error_data; u8 pad[IOACCEL2_PAD]; |