Upon connection establishment check if network portal is T10-PI
enabled and allocate T10-PI resources if necessary, allocate
signature enabled memory regions and mark connection queue-pair
as signature enabled.
Signed-off-by: Sagi Grimberg <sagig@xxxxxxxxxxxx>
---
drivers/infiniband/ulp/isert/ib_isert.c | 104 +++++++++++++++++++++++++++----
drivers/infiniband/ulp/isert/ib_isert.h | 19 +++++-
2 files changed, 106 insertions(+), 17 deletions(-)
diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
index 9ef9193..98f23f4 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -87,7 +87,8 @@ isert_query_device(struct ib_device *ib_dev, struct ib_device_attr *devattr)
}
static int
-isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id)
+isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id,
+ u8 protection)
{
struct isert_device *device = isert_conn->conn_device;
struct ib_qp_init_attr attr;
@@ -119,6 +120,8 @@ isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id)
attr.cap.max_recv_sge = 1;
attr.sq_sig_type = IB_SIGNAL_REQ_WR;
attr.qp_type = IB_QPT_RC;
+ if (protection)
+ attr.create_flags |= IB_QP_CREATE_SIGNATURE_EN;
pr_debug("isert_conn_setup_qp cma_id->device: %p\n",
cma_id->device);
@@ -234,13 +237,18 @@ isert_create_device_ib_res(struct isert_device *device)
device->unreg_rdma_mem = isert_unmap_cmd;
}
+ /* Check signature cap */
+ device->pi_capable = dev_attr->device_cap_flags &
+ IB_DEVICE_SIGNATURE_HANDOVER ? true : false;
+
device->cqs_used = min_t(int, num_online_cpus(),
device->ib_device->num_comp_vectors);
device->cqs_used = min(ISERT_MAX_CQ, device->cqs_used);
pr_debug("Using %d CQs, device %s supports %d vectors support "
- "Fast registration %d\n",
+ "Fast registration %d pi_capable %d\n",
device->cqs_used, device->ib_device->name,
- device->ib_device->num_comp_vectors, device->use_fastreg);
+ device->ib_device->num_comp_vectors, device->use_fastreg,
+ device->pi_capable);
device->cq_desc = kzalloc(sizeof(struct isert_cq_desc) *
device->cqs_used, GFP_KERNEL);
if (!device->cq_desc) {
@@ -383,6 +391,12 @@ isert_conn_free_fastreg_pool(struct isert_conn *isert_conn)
list_del(&fr_desc->list);
ib_free_fast_reg_page_list(fr_desc->data_frpl);
ib_dereg_mr(fr_desc->data_mr);
+ if (fr_desc->pi_ctx) {
+ ib_free_fast_reg_page_list(fr_desc->pi_ctx->prot_frpl);
+ ib_dereg_mr(fr_desc->pi_ctx->prot_mr);
+ ib_destroy_mr(fr_desc->pi_ctx->sig_mr);
+ kfree(fr_desc->pi_ctx);
+ }
kfree(fr_desc);
++i;
}
@@ -394,8 +408,10 @@ isert_conn_free_fastreg_pool(struct isert_conn *isert_conn)
static int
isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd,
- struct fast_reg_descriptor *fr_desc)
+ struct fast_reg_descriptor *fr_desc, u8 protection)
{
+ int ret;
+
fr_desc->data_frpl = ib_alloc_fast_reg_page_list(ib_device,
ISCSI_ISER_SG_TABLESIZE);
if (IS_ERR(fr_desc->data_frpl)) {
@@ -408,19 +424,73 @@ isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd,
if (IS_ERR(fr_desc->data_mr)) {
pr_err("Failed to allocate data frmr err=%ld\n",
PTR_ERR(fr_desc->data_mr));
- ib_free_fast_reg_page_list(fr_desc->data_frpl);
- return PTR_ERR(fr_desc->data_mr);
+ ret = PTR_ERR(fr_desc->data_mr);
+ goto err_data_frpl;
}
pr_debug("Create fr_desc %p page_list %p\n",
fr_desc, fr_desc->data_frpl->page_list);
+ fr_desc->data_key_valid = true;
- fr_desc->valid = true;
+ if (protection) {
+ struct ib_mr_init_attr mr_init_attr = {0};
+ struct pi_context *pi_ctx;
+
+ fr_desc->pi_ctx = kzalloc(sizeof(*fr_desc->pi_ctx), GFP_KERNEL);
+ if (!fr_desc->pi_ctx) {
+ pr_err("Failed to allocate pi context\n");
+ ret = -ENOMEM;
+ goto err_data_mr;
+ }
+ pi_ctx = fr_desc->pi_ctx;
+
+ pi_ctx->prot_frpl = ib_alloc_fast_reg_page_list(ib_device,
+ ISCSI_ISER_SG_TABLESIZE);
+ if (IS_ERR(pi_ctx->prot_frpl)) {
+ pr_err("Failed to allocate prot frpl err=%ld\n",
+ PTR_ERR(pi_ctx->prot_frpl));
+ ret = PTR_ERR(pi_ctx->prot_frpl);
+ goto err_pi_ctx;
+ }
+
+ pi_ctx->prot_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE);
+ if (IS_ERR(pi_ctx->prot_mr)) {
+ pr_err("Failed to allocate prot frmr err=%ld\n",
+ PTR_ERR(pi_ctx->prot_mr));
+ ret = PTR_ERR(pi_ctx->prot_mr);
+ goto err_prot_frpl;
+ }
+ pi_ctx->prot_key_valid = true;
+
+ mr_init_attr.max_reg_descriptors = 2;
+ mr_init_attr.flags |= IB_MR_SIGNATURE_EN;
+ pi_ctx->sig_mr = ib_create_mr(pd, &mr_init_attr);
+ if (IS_ERR(pi_ctx->sig_mr)) {
+ pr_err("Failed to allocate signature enabled mr err=%ld\n",
+ PTR_ERR(pi_ctx->sig_mr));
+ ret = PTR_ERR(pi_ctx->sig_mr);
+ goto err_prot_mr;
+ }
+ pi_ctx->sig_key_valid = true;
+ }
+ fr_desc->protected = false;
return 0;
+err_prot_mr:
+ ib_dereg_mr(fr_desc->pi_ctx->prot_mr);
+err_prot_frpl:
+ ib_free_fast_reg_page_list(fr_desc->pi_ctx->prot_frpl);
+err_pi_ctx:
+ kfree(fr_desc->pi_ctx);
+err_data_mr:
+ ib_dereg_mr(fr_desc->data_mr);
+err_data_frpl:
+ ib_free_fast_reg_page_list(fr_desc->data_frpl);
+
+ return ret;
}
static int
-isert_conn_create_fastreg_pool(struct isert_conn *isert_conn)
+isert_conn_create_fastreg_pool(struct isert_conn *isert_conn, u8 pi_support)
{
struct fast_reg_descriptor *fr_desc;
struct isert_device *device = isert_conn->conn_device;
@@ -437,7 +507,8 @@ isert_conn_create_fastreg_pool(struct isert_conn *isert_conn)
}
ret = isert_create_fr_desc(device->ib_device,
- isert_conn->conn_pd, fr_desc);
+ isert_conn->conn_pd, fr_desc,
+ pi_support);
if (ret) {
pr_err("Failed to create fastreg descriptor err=%d\n",
ret);
@@ -467,6 +538,7 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
struct isert_device *device;
struct ib_device *ib_dev = cma_id->device;
int ret = 0;
+ u8 pi_support = np->tpg_np->tpg->tpg_attrib.t10_pi;
pr_debug("Entering isert_connect_request cma_id: %p, context: %p\n",
cma_id, cma_id->context);
@@ -557,8 +629,14 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
goto out_mr;
}
+ if (pi_support && !device->pi_capable) {
+ pr_err("Protection information requested but not supported\n");
+ ret = -EINVAL;
+ goto out_mr;
+ }
+
if (device->use_fastreg) {
- ret = isert_conn_create_fastreg_pool(isert_conn);
+ ret = isert_conn_create_fastreg_pool(isert_conn, pi_support);
if (ret) {
pr_err("Conn: %p failed to create fastreg pool\n",
isert_conn);
@@ -566,7 +644,7 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
}
}
- ret = isert_conn_setup_qp(isert_conn, cma_id);
+ ret = isert_conn_setup_qp(isert_conn, cma_id, pi_support);
if (ret)
goto out_conn_dev;
@@ -2193,7 +2271,7 @@ isert_fast_reg_mr(struct fast_reg_descriptor *fr_desc,
pagelist_len = isert_map_fr_pagelist(ib_dev, sg_start, sg_nents,
&fr_desc->data_frpl->page_list[0]);
- if (!fr_desc->valid) {
+ if (!fr_desc->data_key_valid) {
memset(&inv_wr, 0, sizeof(inv_wr));
inv_wr.opcode = IB_WR_LOCAL_INV;
inv_wr.ex.invalidate_rkey = fr_desc->data_mr->rkey;
@@ -2225,7 +2303,7 @@ isert_fast_reg_mr(struct fast_reg_descriptor *fr_desc,
pr_err("fast registration failed, ret:%d\n", ret);
return ret;
}
- fr_desc->valid = false;
+ fr_desc->data_key_valid = false;
ib_sge->lkey = fr_desc->data_mr->lkey;
ib_sge->addr = fr_desc->data_frpl->page_list[0] + page_off;
diff --git a/drivers/infiniband/ulp/isert/ib_isert.h b/drivers/infiniband/ulp/isert/ib_isert.h
index 708a069..fab8b50 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.h
+++ b/drivers/infiniband/ulp/isert/ib_isert.h
@@ -48,11 +48,21 @@ struct iser_tx_desc {
struct ib_send_wr send_wr;
} __packed;
+struct pi_context {
+ struct ib_mr *prot_mr;
+ bool prot_key_valid;
+ struct ib_fast_reg_page_list *prot_frpl;
+ struct ib_mr *sig_mr;
+ bool sig_key_valid;
+};
+
struct fast_reg_descriptor {
- struct list_head list;
- struct ib_mr *data_mr;
- struct ib_fast_reg_page_list *data_frpl;
- bool valid;
+ struct list_head list;
+ struct ib_mr *data_mr;
+ bool data_key_valid;
+ struct ib_fast_reg_page_list *data_frpl;
+ bool protected;
+ struct pi_context *pi_ctx;
};
struct isert_rdma_wr {
@@ -140,6 +150,7 @@ struct isert_cq_desc {
struct isert_device {
int use_fastreg;
+ bool pi_capable;
int cqs_used;
int refcount;
int cq_active_qps[ISERT_MAX_CQ];
--
1.7.1
--
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