@@ -764,7 +764,7 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev, int entries,
struct c4iw_create_cq_resp uresp;
struct c4iw_ucontext *ucontext = NULL;
int ret;
- size_t memsize;
+ size_t memsize, hwentries;
struct c4iw_mm_entry *mm, *mm2;
PDBG("%s ib_dev %p entries %d\n", __func__, ibdev, entries);
@@ -788,14 +788,29 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev, int entries,
* entries must be multiple of 16 for HW.
*/
entries = roundup(entries, 16);
- memsize = entries * sizeof *chp->cq.queue;
+
+ /*
+ * Make actual HW queue 2x to avoid cdix_inc overflows.
+ */
+ hwentries = entries * 2;
+
+ /*
+ * Make HW queue at least 64 entries so GTS updates aren't too
+ * frequent.
+ */
+ if (hwentries < 64)
+ hwentries = 64;
+
+ memsize = hwentries * sizeof *chp->cq.queue;
/*
* memsize must be a multiple of the page size if its a user cq.
*/
- if (ucontext)
+ if (ucontext) {
memsize = roundup(memsize, PAGE_SIZE);
- chp->cq.size = entries;
+ hwentries = memsize / sizeof *chp->cq.queue;
+ }
+ chp->cq.size = hwentries;
chp->cq.memsize = memsize;
ret = create_cq(&rhp->rdev, &chp->cq,
@@ -805,7 +820,7 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev, int entries,
chp->rhp = rhp;
chp->cq.size--; /* status page */
- chp->ibcq.cqe = chp->cq.size - 1;
+ chp->ibcq.cqe = entries - 2;
spin_lock_init(&chp->lock);
atomic_set(&chp->refcnt, 1);
init_waitqueue_head(&chp->wait);