Add constants and data structures to support immediate data. These
changes conform to SRP2r04.
Cc: Sergey Gorenko <sergeygo@xxxxxxxxxxxx>
Cc: Max Gurtovoy <maxg@xxxxxxxxxxxx>
Cc: Laurence Oberman <loberman@xxxxxxxxxx>
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
---
drivers/infiniband/ulp/srp/ib_srp.c | 5 +++++
include/scsi/srp.h | 19 ++++++++++++++++---
2 files changed, 21 insertions(+), 3 deletions(-)
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index eed0eb3bb04c..cff6b69af043 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -4172,6 +4172,11 @@ static int __init srp_init_module(void)
{
int ret;
+ BUILD_BUG_ON(sizeof(struct srp_imm_buf) != 4);
+ BUILD_BUG_ON(sizeof(struct srp_login_req) != 64);
+ BUILD_BUG_ON(sizeof(struct srp_login_req_rdma) != 56);
+ BUILD_BUG_ON(sizeof(struct srp_cmd) != 48);
+
if (srp_sg_tablesize) {
pr_warn("srp_sg_tablesize is deprecated, please use cmd_sg_entries\n");
if (!cmd_sg_entries)
diff --git a/include/scsi/srp.h b/include/scsi/srp.h
index 15cb8cf8a604..9220758d5087 100644
--- a/include/scsi/srp.h
+++ b/include/scsi/srp.h
@@ -67,7 +67,8 @@ enum {
enum {
SRP_NO_DATA_DESC = 0,
SRP_DATA_DESC_DIRECT = 1,
- SRP_DATA_DESC_INDIRECT = 2
+ SRP_DATA_DESC_INDIRECT = 2,
+ SRP_DATA_DESC_IMM = 3, /* new in SRP2 */
};
enum {
@@ -111,9 +112,16 @@ struct srp_indirect_buf {
struct srp_direct_buf desc_list[0];
} __attribute__((packed));
+/* Immediate data buffer descriptor as defined in SRP2. */
+struct srp_imm_buf {
+ __be32 len;
+};
+
+/* srp_login_req.flags */
enum {
SRP_MULTICHAN_SINGLE = 0,
- SRP_MULTICHAN_MULTI = 1
+ SRP_MULTICHAN_MULTI = 1,
+ SRP_IMMED_REQUESTED = 0x80, /* new in SRP2 */
};
struct srp_login_req {
@@ -124,7 +132,9 @@ struct srp_login_req {
u8 reserved2[4];
__be16 req_buf_fmt;
u8 req_flags;
- u8 reserved3[5];
+ u8 reserved3[1];
+ __be16 imm_data_offset; /* new in SRP2 */
+ u8 reserved4[2];
u8 initiator_port_id[16];
u8 target_port_id[16];
};
@@ -144,6 +154,8 @@ struct srp_login_req_rdma {
__be32 req_it_iu_len;
u8 initiator_port_id[16];
u8 target_port_id[16];
+ __be16 imm_data_offset;
+ u8 reserved[6];
};
/* srp_login_rsp.rsp_flags */
@@ -151,6 +163,7 @@ enum {
SRP_LOGIN_RSP_MULTICHAN_NO_CHAN = 0x0,
SRP_LOGIN_RSP_MULTICHAN_TERMINATED = 0x1,
SRP_LOGIN_RSP_MULTICHAN_MAINTAINED = 0x2,
+ SRP_LOGIN_RSP_IMMED_SUPP = 0x80, /* new in SRP2 */
};
/*
--
2.20.0.405.gbc1bbc6f85-goog
