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[infiniband] Flush uncompleted work queue entries at QP teardown

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Avoid leaking I/O buffers in ib_destroy_qp() by completing any
outstanding work queue entries with a generic error code.  This
requires the completion handlers to be available to ib_destroy_qp(),
which is done by making them static configuration parameters of the CQ
(set by ib_create_cq()) rather than being provided on each call to
ib_poll_cq().

This mimics the functionality of netdev_{tx,rx}_flush().  The netdev
flush functions would previously have been catching any I/O buffers
leaked by the IPoIB data queue (though not by the IPoIB metadata
queue).
This commit is contained in:
Michael Brown
2008-10-03 00:07:52 +01:00
parent dd34500188
commit d9751edafa
5 changed files with 134 additions and 73 deletions
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23
src/drivers/infiniband/arbel.c
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@@ -1106,15 +1106,11 @@ static int arbel_post_recv ( struct ib_device *ibdev,
* @v ibdev Infiniband device
* @v cq Completion queue
* @v cqe Hardware completion queue entry
* @v complete_send Send completion handler
* @v complete_recv Receive completion handler
* @ret rc Return status code
*/
static int arbel_complete ( struct ib_device *ibdev,
struct ib_completion_queue *cq,
union arbelprm_completion_entry *cqe,
ib_completer_t complete_send,
ib_completer_t complete_recv ) {
union arbelprm_completion_entry *cqe ) {
struct arbel *arbel = ib_get_drvdata ( ibdev );
struct ib_completion completion;
struct ib_work_queue *wq;
@@ -1124,7 +1120,6 @@ static int arbel_complete ( struct ib_device *ibdev,
struct arbel_recv_work_queue *arbel_recv_wq;
struct arbelprm_recv_wqe *recv_wqe;
struct io_buffer *iobuf;
ib_completer_t complete;
unsigned int opcode;
unsigned long qpn;
int is_send;
@@ -1201,8 +1196,11 @@ static int arbel_complete ( struct ib_device *ibdev,
}
/* Pass off to caller's completion handler */
complete = ( is_send ? complete_send : complete_recv );
complete ( ibdev, qp, &completion, iobuf );
if ( is_send ) {
ib_complete_send ( ibdev, qp, &completion, iobuf );
} else {
ib_complete_recv ( ibdev, qp, &completion, iobuf );
}
return rc;
}
@@ -1212,13 +1210,9 @@ static int arbel_complete ( struct ib_device *ibdev,
*
* @v ibdev Infiniband device
* @v cq Completion queue
* @v complete_send Send completion handler
* @v complete_recv Receive completion handler
*/
static void arbel_poll_cq ( struct ib_device *ibdev,
struct ib_completion_queue *cq,
ib_completer_t complete_send,
ib_completer_t complete_recv ) {
struct ib_completion_queue *cq ) {
struct arbel *arbel = ib_get_drvdata ( ibdev );
struct arbel_completion_queue *arbel_cq = ib_cq_get_drvdata ( cq );
struct arbelprm_cq_ci_db_record *ci_db_rec;
@@ -1236,8 +1230,7 @@ static void arbel_poll_cq ( struct ib_device *ibdev,
}
/* Handle completion */
if ( ( rc = arbel_complete ( ibdev, cq, cqe, complete_send,
complete_recv ) ) != 0 ) {
if ( ( rc = arbel_complete ( ibdev, cq, cqe ) ) != 0 ) {
DBGC ( arbel, "Arbel %p failed to complete: %s\n",
arbel, strerror ( rc ) );
DBGC_HD ( arbel, cqe, sizeof ( *cqe ) );