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Commit ce65e5b9 authored by Nicholas Bellinger's avatar Nicholas Bellinger
Browse files

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: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent f82f320e

include/target/target_core_backend.h

+3 −0
Original line number Diff line number Diff line
@@ -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 {

include/target/target_core_base.h

+44 −0
Original line number Diff line number Diff line
@@ -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 {