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iser-target: Split and properly type the login buffer 

The login receive buffer is used as a iser_rx_desc, so type it as such
in struct isert_conn and allocate the exactly right space for it.  The
TX buffer is moved to a separate variable and properly sized as well.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Christoph Hellwig 2016-02-24 19:24:05 +02:00 committed by Nicholas Bellinger
parent ed1083b251
commit 5adabdd122
2 changed files with 29 additions and 30 deletions
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56
drivers/infiniband/ulp/isert/ib_isert.c
View File

@ -597,10 +597,12 @@ isert_free_login_buf(struct isert_conn *isert_conn)
ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma,
ISER_RX_PAYLOAD_SIZE, DMA_TO_DEVICE);
kfree(isert_conn->login_rsp_buf);
ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma,
ISCSI_DEF_MAX_RECV_SEG_LEN,
ISER_RX_PAYLOAD_SIZE,
DMA_FROM_DEVICE);
kfree(isert_conn->login_buf);
kfree(isert_conn->login_req_buf);
}
static int
@ -609,50 +611,48 @@ isert_alloc_login_buf(struct isert_conn *isert_conn,
{
int ret;
isert_conn->login_buf = kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN +
ISER_RX_PAYLOAD_SIZE, GFP_KERNEL);
if (!isert_conn->login_buf) {
isert_conn->login_req_buf = kzalloc(sizeof(*isert_conn->login_req_buf),
GFP_KERNEL);
if (!isert_conn->login_req_buf) {
isert_err("Unable to allocate isert_conn->login_buf\n");
return -ENOMEM;
}
isert_conn->login_req_buf = isert_conn->login_buf;
isert_conn->login_rsp_buf = isert_conn->login_buf +
ISCSI_DEF_MAX_RECV_SEG_LEN;
isert_dbg("Set login_buf: %p login_req_buf: %p login_rsp_buf: %p\n",
isert_conn->login_buf, isert_conn->login_req_buf,
isert_conn->login_rsp_buf);
isert_conn->login_req_dma = ib_dma_map_single(ib_dev,
(void *)isert_conn->login_req_buf,
ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE);
isert_conn->login_req_buf,
ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma);
if (ret) {
isert_err("login_req_dma mapping error: %d\n", ret);
isert_conn->login_req_dma = 0;
goto out_login_buf;
goto out_free_login_req_buf;
}
isert_conn->login_rsp_buf = kzalloc(ISER_RX_PAYLOAD_SIZE, GFP_KERNEL);
if (!isert_conn->login_rsp_buf) {
isert_err("Unable to allocate isert_conn->login_rspbuf\n");
goto out_unmap_login_req_buf;
}
isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev,
(void *)isert_conn->login_rsp_buf,
isert_conn->login_rsp_buf,
ISER_RX_PAYLOAD_SIZE, DMA_TO_DEVICE);
ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma);
if (ret) {
isert_err("login_rsp_dma mapping error: %d\n", ret);
isert_conn->login_rsp_dma = 0;
goto out_req_dma_map;
goto out_free_login_rsp_buf;
}
return 0;
out_req_dma_map:
out_free_login_rsp_buf:
kfree(isert_conn->login_rsp_buf);
out_unmap_login_req_buf:
ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma,
ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE);
out_login_buf:
kfree(isert_conn->login_buf);
ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
out_free_login_req_buf:
kfree(isert_conn->login_req_buf);
return ret;
}
@ -773,7 +773,7 @@ isert_connect_release(struct isert_conn *isert_conn)
ib_destroy_qp(isert_conn->qp);
}
if (isert_conn->login_buf)
if (isert_conn->login_req_buf)
isert_free_login_buf(isert_conn);
isert_device_put(device);
@ -1216,7 +1216,7 @@ post_send:
static void
isert_rx_login_req(struct isert_conn *isert_conn)
{
struct iser_rx_desc *rx_desc = (void *)isert_conn->login_req_buf;
struct iser_rx_desc *rx_desc = isert_conn->login_req_buf;
int rx_buflen = isert_conn->login_req_len;
struct iscsi_conn *conn = isert_conn->conn;
struct iscsi_login *login = conn->conn_login;
@ -1594,7 +1594,7 @@ isert_rcv_completion(struct iser_rx_desc *desc,
u64 rx_dma;
int rx_buflen;
if ((char *)desc == isert_conn->login_req_buf) {
if (desc == isert_conn->login_req_buf) {
rx_dma = isert_conn->login_req_dma;
rx_buflen = ISER_RX_PAYLOAD_SIZE;
isert_dbg("login_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n",
@ -1613,7 +1613,7 @@ isert_rcv_completion(struct iser_rx_desc *desc,
hdr->opcode, hdr->itt, hdr->flags,
(int)(xfer_len - ISER_HEADERS_LEN));
if ((char *)desc == isert_conn->login_req_buf) {
if (desc == isert_conn->login_req_buf) {
isert_conn->login_req_len = xfer_len - ISER_HEADERS_LEN;
if (isert_conn->conn) {
struct iscsi_login *login = isert_conn->conn->conn_login;

3
drivers/infiniband/ulp/isert/ib_isert.h
View File

@ -182,8 +182,7 @@ struct isert_conn {
u32 initiator_depth;
bool pi_support;
u32 max_sge;
char *login_buf;
char *login_req_buf;
struct iser_rx_desc *login_req_buf;
char *login_rsp_buf;
u64 login_req_dma;
int login_req_len;