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i40iw: Fix the connection ORD value for loopback

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The accepting QP ORD value should be adjusted not to
exceed the peer QP IRD value (RFC 6581). This is
skipped for loopback. After the ORD is validated
by i40iw_record_ird_ord(), adjust the ORD value of
the loopback accepting QP to prevent overrunning the
IRD space of the peer QP. Also move the ORD accounting
for 0-byte RDMA read to i40iw_record_ird_ord().

Fixes: f27b4746f3 ("i40iw: add connection management code")
Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Tatyana Nikolova 2017-12-22 09:47:02 -06:00 committed by Jason Gunthorpe
parent ce9ce74145
commit fefa06811c
1 changed files with 14 additions and 12 deletions
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26
drivers/infiniband/hw/i40iw/i40iw_cm.c
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@ -128,6 +128,8 @@ static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u32 conn_ird,
if (conn_ord > I40IW_MAX_ORD_SIZE)
conn_ord = I40IW_MAX_ORD_SIZE;
else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO)
conn_ord = 1;
cm_node->ird_size = conn_ird;
cm_node->ord_size = conn_ord;
@ -2874,15 +2876,13 @@ static struct i40iw_cm_listener *i40iw_make_listen_node(
* i40iw_create_cm_node - make a connection node with params
* @cm_core: cm's core
* @iwdev: iwarp device structure
* @private_data_len: len to provate data for mpa request
* @private_data: pointer to private data for connection
* @conn_param: upper layer connection parameters
* @cm_info: quad info for connection
*/
static struct i40iw_cm_node *i40iw_create_cm_node(
struct i40iw_cm_core *cm_core,
struct i40iw_device *iwdev,
u16 private_data_len,
void *private_data,
struct iw_cm_conn_param *conn_param,
struct i40iw_cm_info *cm_info)
{
struct i40iw_cm_node *cm_node;
@ -2890,6 +2890,9 @@ static struct i40iw_cm_node *i40iw_create_cm_node(
struct i40iw_cm_node *loopback_remotenode;
struct i40iw_cm_info loopback_cm_info;
u16 private_data_len = conn_param->private_data_len;
const void *private_data = conn_param->private_data;
/* create a CM connection node */
cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
if (!cm_node)
@ -2898,6 +2901,8 @@ static struct i40iw_cm_node *i40iw_create_cm_node(
cm_node->tcp_cntxt.client = 1;
cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
i40iw_record_ird_ord(cm_node, conn_param->ird, conn_param->ord);
if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
loopback_remotelistener = i40iw_find_listener(
cm_core,
@ -2931,6 +2936,10 @@ static struct i40iw_cm_node *i40iw_create_cm_node(
private_data_len);
loopback_remotenode->pdata.size = private_data_len;
if (loopback_remotenode->ord_size > cm_node->ird_size)
loopback_remotenode->ord_size =
cm_node->ird_size;
cm_node->state = I40IW_CM_STATE_OFFLOADED;
cm_node->tcp_cntxt.rcv_nxt =
loopback_remotenode->tcp_cntxt.loc_seq_num;
@ -3809,9 +3818,7 @@ int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
__func__, cm_id->tos, cm_info.user_pri);
cm_id->add_ref(cm_id);
cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
conn_param->private_data_len,
(void *)conn_param->private_data,
&cm_info);
conn_param, &cm_info);
if (IS_ERR(cm_node)) {
ret = PTR_ERR(cm_node);
@ -3843,11 +3850,6 @@ int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
}
cm_node->apbvt_set = true;
i40iw_record_ird_ord(cm_node, conn_param->ird, conn_param->ord);
if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
!cm_node->ord_size)
cm_node->ord_size = 1;
iwqp->cm_node = cm_node;
cm_node->iwqp = iwqp;
iwqp->cm_id = cm_id;