IB/iser: Pass registration pool a size parameter
Hard coded for now. This will allow to allocate different
sized MRs depending on the IO size needed (and device
capabilities).
This patch does not change any functionality.
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h
index e6105d2..e9ebe0b 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.h
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.h
@@ -339,7 +339,8 @@
*/
struct iser_reg_ops {
int (*alloc_reg_res)(struct ib_conn *ib_conn,
- unsigned cmds_max);
+ unsigned cmds_max,
+ unsigned int size);
void (*free_reg_res)(struct ib_conn *ib_conn);
int (*reg_mem)(struct iscsi_iser_task *iser_task,
struct iser_data_buf *mem,
@@ -658,9 +659,13 @@
struct iser_tx_desc *tx_desc);
int iser_alloc_rx_descriptors(struct iser_conn *iser_conn,
struct iscsi_session *session);
-int iser_alloc_fmr_pool(struct ib_conn *ib_conn, unsigned cmds_max);
+int iser_alloc_fmr_pool(struct ib_conn *ib_conn,
+ unsigned cmds_max,
+ unsigned int size);
void iser_free_fmr_pool(struct ib_conn *ib_conn);
-int iser_alloc_fastreg_pool(struct ib_conn *ib_conn, unsigned cmds_max);
+int iser_alloc_fastreg_pool(struct ib_conn *ib_conn,
+ unsigned cmds_max,
+ unsigned int size);
void iser_free_fastreg_pool(struct ib_conn *ib_conn);
u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task,
enum iser_data_dir cmd_dir, sector_t *sector);
diff --git a/drivers/infiniband/ulp/iser/iser_initiator.c b/drivers/infiniband/ulp/iser/iser_initiator.c
index ae19c69..f1200f2 100644
--- a/drivers/infiniband/ulp/iser/iser_initiator.c
+++ b/drivers/infiniband/ulp/iser/iser_initiator.c
@@ -258,7 +258,8 @@
iser_conn->qp_max_recv_dtos_mask = session->cmds_max - 1; /* cmds_max is 2^N */
iser_conn->min_posted_rx = iser_conn->qp_max_recv_dtos >> 2;
- if (device->reg_ops->alloc_reg_res(ib_conn, session->scsi_cmds_max))
+ if (device->reg_ops->alloc_reg_res(ib_conn, session->scsi_cmds_max,
+ ISCSI_ISER_SG_TABLESIZE + 1))
goto create_rdma_reg_res_failed;
if (iser_alloc_login_buf(iser_conn))
diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index 5b5432d..0ade0e8 100644
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -199,7 +199,9 @@
*
* returns 0 on success, or errno code on failure
*/
-int iser_alloc_fmr_pool(struct ib_conn *ib_conn, unsigned cmds_max)
+int iser_alloc_fmr_pool(struct ib_conn *ib_conn,
+ unsigned cmds_max,
+ unsigned int size)
{
struct iser_device *device = ib_conn->device;
struct iser_fr_pool *fr_pool = &ib_conn->fr_pool;
@@ -216,8 +218,7 @@
if (!desc)
return -ENOMEM;
- page_vec = kmalloc(sizeof(*page_vec) +
- (sizeof(u64) * (ISCSI_ISER_SG_TABLESIZE + 1)),
+ page_vec = kmalloc(sizeof(*page_vec) + (sizeof(u64) * size),
GFP_KERNEL);
if (!page_vec) {
ret = -ENOMEM;
@@ -227,9 +228,7 @@
page_vec->pages = (u64 *)(page_vec + 1);
params.page_shift = SHIFT_4K;
- /* when the first/last SG element are not start/end *
- * page aligned, the map whould be of N+1 pages */
- params.max_pages_per_fmr = ISCSI_ISER_SG_TABLESIZE + 1;
+ params.max_pages_per_fmr = size;
/* make the pool size twice the max number of SCSI commands *
* the ML is expected to queue, watermark for unmap at 50% */
params.pool_size = cmds_max * 2;
@@ -282,13 +281,14 @@
}
static int
-iser_alloc_reg_res(struct ib_device *ib_device, struct ib_pd *pd,
- struct iser_reg_resources *res)
+iser_alloc_reg_res(struct ib_device *ib_device,
+ struct ib_pd *pd,
+ struct iser_reg_resources *res,
+ unsigned int size)
{
int ret;
- res->frpl = ib_alloc_fast_reg_page_list(ib_device,
- ISCSI_ISER_SG_TABLESIZE + 1);
+ res->frpl = ib_alloc_fast_reg_page_list(ib_device, size);
if (IS_ERR(res->frpl)) {
ret = PTR_ERR(res->frpl);
iser_err("Failed to allocate ib_fast_reg_page_list err=%d\n",
@@ -296,8 +296,7 @@
return PTR_ERR(res->frpl);
}
- res->mr = ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG,
- ISCSI_ISER_SG_TABLESIZE + 1);
+ res->mr = ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG, size);
if (IS_ERR(res->mr)) {
ret = PTR_ERR(res->mr);
iser_err("Failed to allocate ib_fast_reg_mr err=%d\n", ret);
@@ -321,8 +320,10 @@
}
static int
-iser_alloc_pi_ctx(struct ib_device *ib_device, struct ib_pd *pd,
- struct iser_fr_desc *desc)
+iser_alloc_pi_ctx(struct ib_device *ib_device,
+ struct ib_pd *pd,
+ struct iser_fr_desc *desc,
+ unsigned int size)
{
struct iser_pi_context *pi_ctx = NULL;
int ret;
@@ -333,7 +334,7 @@
pi_ctx = desc->pi_ctx;
- ret = iser_alloc_reg_res(ib_device, pd, &pi_ctx->rsc);
+ ret = iser_alloc_reg_res(ib_device, pd, &pi_ctx->rsc, size);
if (ret) {
iser_err("failed to allocate reg_resources\n");
goto alloc_reg_res_err;
@@ -366,8 +367,10 @@
}
static struct iser_fr_desc *
-iser_create_fastreg_desc(struct ib_device *ib_device, struct ib_pd *pd,
- bool pi_enable)
+iser_create_fastreg_desc(struct ib_device *ib_device,
+ struct ib_pd *pd,
+ bool pi_enable,
+ unsigned int size)
{
struct iser_fr_desc *desc;
int ret;
@@ -376,12 +379,12 @@
if (!desc)
return ERR_PTR(-ENOMEM);
- ret = iser_alloc_reg_res(ib_device, pd, &desc->rsc);
+ ret = iser_alloc_reg_res(ib_device, pd, &desc->rsc, size);
if (ret)
goto reg_res_alloc_failure;
if (pi_enable) {
- ret = iser_alloc_pi_ctx(ib_device, pd, desc);
+ ret = iser_alloc_pi_ctx(ib_device, pd, desc, size);
if (ret)
goto pi_ctx_alloc_failure;
}
@@ -401,7 +404,9 @@
* for fast registration work requests.
* returns 0 on success, or errno code on failure
*/
-int iser_alloc_fastreg_pool(struct ib_conn *ib_conn, unsigned cmds_max)
+int iser_alloc_fastreg_pool(struct ib_conn *ib_conn,
+ unsigned cmds_max,
+ unsigned int size)
{
struct iser_device *device = ib_conn->device;
struct iser_fr_pool *fr_pool = &ib_conn->fr_pool;
@@ -413,7 +418,7 @@
fr_pool->size = 0;
for (i = 0; i < cmds_max; i++) {
desc = iser_create_fastreg_desc(device->ib_device, device->pd,
- ib_conn->pi_support);
+ ib_conn->pi_support, size);
if (IS_ERR(desc)) {
ret = PTR_ERR(desc);
goto err;