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Commit 5279d3ac authored by Steve Wise's avatar Steve Wise Committed by Roland Dreier
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RDMA/cxgb3: Don't allocate the SW queue for user mode CQs 



Only kernel mode CQs need the SW queue memory allocated.  The SW queue
for user mode CQs is allocated in userspace by libcxgb3.

Signed-off-by: default avatarSteve Wise <swise@opengridcomputing.com>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 9918b28d

drivers/infiniband/hw/cxgb3/cxio_hal.c

+7 −7
Original line number Diff line number Diff line
@@ -154,7 +154,7 @@ static int cxio_hal_clear_qp_ctx(struct cxio_rdev *rdev_p, u32 qpid) 
	return iwch_cxgb3_ofld_send(rdev_p->t3cdev_p, skb);

}



int cxio_create_cq(struct cxio_rdev *rdev_p, struct t3_cq *cq)

int cxio_create_cq(struct cxio_rdev *rdev_p, struct t3_cq *cq, int kernel)

{

	struct rdma_cq_setup setup;

	int size = (1UL << (cq->size_log2)) * sizeof(struct t3_cqe);
@@ -162,12 +162,12 @@ int cxio_create_cq(struct cxio_rdev *rdev_p, struct t3_cq *cq) 
	cq->cqid = cxio_hal_get_cqid(rdev_p->rscp);

	if (!cq->cqid)

		return -ENOMEM;

	if (kernel) {

		cq->sw_queue = kzalloc(size, GFP_KERNEL);

		if (!cq->sw_queue)

			return -ENOMEM;

	cq->queue = dma_alloc_coherent(&(rdev_p->rnic_info.pdev->dev),

					     (1UL << (cq->size_log2)) *

					     sizeof(struct t3_cqe),

	}

	cq->queue = dma_alloc_coherent(&(rdev_p->rnic_info.pdev->dev), size,

					     &(cq->dma_addr), GFP_KERNEL);

	if (!cq->queue) {

		kfree(cq->sw_queue);

drivers/infiniband/hw/cxgb3/cxio_hal.h

+1 −1
Original line number Diff line number Diff line
@@ -157,7 +157,7 @@ int cxio_rdev_open(struct cxio_rdev *rdev); 
void cxio_rdev_close(struct cxio_rdev *rdev);

int cxio_hal_cq_op(struct cxio_rdev *rdev, struct t3_cq *cq,

		   enum t3_cq_opcode op, u32 credit);

int cxio_create_cq(struct cxio_rdev *rdev, struct t3_cq *cq);

int cxio_create_cq(struct cxio_rdev *rdev, struct t3_cq *cq, int kernel);

int cxio_destroy_cq(struct cxio_rdev *rdev, struct t3_cq *cq);

int cxio_resize_cq(struct cxio_rdev *rdev, struct t3_cq *cq);

void cxio_release_ucontext(struct cxio_rdev *rdev, struct cxio_ucontext *uctx);

drivers/infiniband/hw/cxgb3/iwch_provider.c

+1 −1
Original line number Diff line number Diff line
@@ -187,7 +187,7 @@ static struct ib_cq *iwch_create_cq(struct ib_device *ibdev, int entries, int ve 
	entries = roundup_pow_of_two(entries);

	chp->cq.size_log2 = ilog2(entries);



	if (cxio_create_cq(&rhp->rdev, &chp->cq)) {

	if (cxio_create_cq(&rhp->rdev, &chp->cq, !ucontext)) {

		kfree(chp);

		return ERR_PTR(-ENOMEM);

	}