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IB/iser: Suppress completions for fast registration work requests

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In case iSER uses fast registration method, it should not request for
successful completions on fast registration nor local invalidate
requests.  We color wr_id with ISER_FRWR_LI_WRID in order to correctly
consume error completions.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Sagi Grimberg 2014-01-23 12:31:28 +02:00 committed by Roland Dreier
parent cfbf8d4857
commit db523b8de1
3 changed files with 12 additions and 19 deletions
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2
drivers/infiniband/ulp/iser/iscsi_iser.h
View File

@ -138,6 +138,8 @@
#define ISER_WSV 0x08
#define ISER_RSV 0x04
#define ISER_FRWR_LI_WRID 0xffffffffffffffffULL
struct iser_hdr {
u8 flags;
u8 rsvd[3];

15
drivers/infiniband/ulp/iser/iser_memory.c
View File

@ -457,8 +457,8 @@ static int iser_fast_reg_mr(struct fast_reg_descriptor *desc,
if (!desc->valid) {
memset(&inv_wr, 0, sizeof(inv_wr));
inv_wr.wr_id = ISER_FRWR_LI_WRID;
inv_wr.opcode = IB_WR_LOCAL_INV;
inv_wr.send_flags = IB_SEND_SIGNALED;
inv_wr.ex.invalidate_rkey = desc->data_mr->rkey;
wr = &inv_wr;
/* Bump the key */
@ -468,8 +468,8 @@ static int iser_fast_reg_mr(struct fast_reg_descriptor *desc,
/* Prepare FASTREG WR */
memset(&fastreg_wr, 0, sizeof(fastreg_wr));
fastreg_wr.wr_id = ISER_FRWR_LI_WRID;
fastreg_wr.opcode = IB_WR_FAST_REG_MR;
fastreg_wr.send_flags = IB_SEND_SIGNALED;
fastreg_wr.wr.fast_reg.iova_start = desc->data_frpl->page_list[0] + offset;
fastreg_wr.wr.fast_reg.page_list = desc->data_frpl;
fastreg_wr.wr.fast_reg.page_list_len = page_list_len;
@ -480,20 +480,13 @@ static int iser_fast_reg_mr(struct fast_reg_descriptor *desc,
IB_ACCESS_REMOTE_WRITE |
IB_ACCESS_REMOTE_READ);
if (!wr) {
if (!wr)
wr = &fastreg_wr;
atomic_inc(&ib_conn->post_send_buf_count);
} else {
else
wr->next = &fastreg_wr;
atomic_add(2, &ib_conn->post_send_buf_count);
}
ret = ib_post_send(ib_conn->qp, wr, &bad_wr);
if (ret) {
if (bad_wr->next)
atomic_sub(2, &ib_conn->post_send_buf_count);
else
atomic_dec(&ib_conn->post_send_buf_count);
iser_err("fast registration failed, ret:%d\n", ret);
return ret;
}

14
drivers/infiniband/ulp/iser/iser_verbs.c
View File

@ -993,18 +993,16 @@ static int iser_drain_tx_cq(struct iser_device *device, int cq_index)
if (wc.status == IB_WC_SUCCESS) {
if (wc.opcode == IB_WC_SEND)
iser_snd_completion(tx_desc, ib_conn);
else if (wc.opcode == IB_WC_LOCAL_INV ||
wc.opcode == IB_WC_FAST_REG_MR) {
atomic_dec(&ib_conn->post_send_buf_count);
continue;
} else
else
iser_err("expected opcode %d got %d\n",
IB_WC_SEND, wc.opcode);
} else {
iser_err("tx id %llx status %d vend_err %x\n",
wc.wr_id, wc.status, wc.vendor_err);
atomic_dec(&ib_conn->post_send_buf_count);
iser_handle_comp_error(tx_desc, ib_conn);
wc.wr_id, wc.status, wc.vendor_err);
if (wc.wr_id != ISER_FRWR_LI_WRID) {
atomic_dec(&ib_conn->post_send_buf_count);
iser_handle_comp_error(tx_desc, ib_conn);
}
}
completed_tx++;
}