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target: Add DIF related base definitions 

This patch adds DIF related definitions to target_core_base.h
that includes enums for target_prot_op + target_prot_type +
target_prot_version + target_guard_type + target_pi_error.

Also included is struct se_dif_v1_tuple, along with changes
to struct se_cmd, struct se_dev_attrib, and struct se_device.

Also, add new se_subsystem_api->[init,format,free]_prot() callers
used by target core code to setup backend specific protection
information after the device has been configured.

Enums taken from Sagi Grimberg's original patch.

v2 changes:
  - Drop guard_type related definitions
  - Update target_prot_op + target_prot_ho definitions (Sagi)
  - Drop SCF_PROT + pi_prot_version flag
  - Add se_subsystem_api->format_prot() (Sagi)
  - Add hw_pi_prot_type device attribute

Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2013-12-23 20:28:13 +00:00
parent f82f320edc
commit ce65e5b97b
2 changed files with 47 additions and 0 deletions
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3
include/target/target_core_backend.h
View File

@ -41,6 +41,9 @@ struct se_subsystem_api {
unsigned int (*get_io_opt)(struct se_device *);
unsigned char *(*get_sense_buffer)(struct se_cmd *);
bool (*get_write_cache)(struct se_device *);
int (*init_prot)(struct se_device *);
int (*format_prot)(struct se_device *);
void (*free_prot)(struct se_device *);
};
struct sbc_ops {

44
include/target/target_core_base.h
View File

@ -435,6 +435,34 @@ struct se_tmr_req {
struct list_head tmr_list;
};
enum target_prot_op {
TARGET_PROT_NORMAL = 0,
TARGET_PROT_DIN_INSERT,
TARGET_PROT_DOUT_INSERT,
TARGET_PROT_DIN_STRIP,
TARGET_PROT_DOUT_STRIP,
TARGET_PROT_DIN_PASS,
TARGET_PROT_DOUT_PASS,
};
enum target_prot_ho {
PROT_SEPERATED,
PROT_INTERLEAVED,
};
enum target_prot_type {
TARGET_DIF_TYPE0_PROT,
TARGET_DIF_TYPE1_PROT,
TARGET_DIF_TYPE2_PROT,
TARGET_DIF_TYPE3_PROT,
};
struct se_dif_v1_tuple {
__be16 guard_tag;
__be16 app_tag;
__be32 ref_tag;
};
struct se_cmd {
/* SAM response code being sent to initiator */
u8 scsi_status;
@ -519,6 +547,17 @@ struct se_cmd {
/* Used for lun->lun_ref counting */
bool lun_ref_active;
/* DIF related members */
enum target_prot_op prot_op;
enum target_prot_type prot_type;
u32 prot_length;
u32 reftag_seed;
struct scatterlist *t_prot_sg;
unsigned int t_prot_nents;
enum target_prot_ho prot_handover;
sense_reason_t pi_err;
u32 block_num;
};
struct se_ua {
@ -629,6 +668,9 @@ struct se_dev_attrib {
int emulate_tpws;
int emulate_caw;
int emulate_3pc;
int pi_prot_format;
enum target_prot_type pi_prot_type;
enum target_prot_type hw_pi_prot_type;
int enforce_pr_isids;
int is_nonrot;
int emulate_rest_reord;
@ -759,6 +801,8 @@ struct se_device {
/* Linked list for struct se_hba struct se_device list */
struct list_head dev_list;
struct se_lun xcopy_lun;
/* Protection Information */
int prot_length;
};
struct se_hba {