From ce65e5b97b19446ff91e9ee0bbcd9f8b8e87ae5a Mon Sep 17 00:00:00 2001
From: Nicholas Bellinger <nab@linux-iscsi.org>
Date: Mon, 23 Dec 2013 20:28:13 +0000
Subject: [PATCH] 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>
---
include/target/target_core_backend.h | 3 ++
include/target/target_core_base.h | 44 ++++++++++++++++++++++++++++
2 files changed, 47 insertions(+)
diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h
index 39e0114d70c5..0dc2745b9b18 100644
--- a/include/target/target_core_backend.h
+++ b/include/target/target_core_backend.h
@@ -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 {
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index dd87ab46ce21..d98048b97fe3 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -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 {
--
2.34.1