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From: Xiao Yang <yangx.jy@fujitsu.com>
To: <linux-rdma@vger.kernel.org>
Cc: <rpearsonhpe@gmail.com>, <zyjzyj2000@gmail.com>, <jgg@nvidia.com>,
	<leon@kernel.org>, Xiao Yang <yangx.jy@fujitsu.com>
Subject: [PATCH 1/3] RDMA/rxe: Remove unnecessary check for qp->is_user/cq->is_user
Date: Mon, 23 Aug 2021 17:22:54 +0800	[thread overview]
Message-ID: <20210823092256.287154-2-yangx.jy@fujitsu.com> (raw)
In-Reply-To: <20210823092256.287154-1-yangx.jy@fujitsu.com>

1) post_one_send() always processes kernel's send queue.
2) rxe_poll_cq() always processes kernel's completion queue.

Fixes: 5bcf5a59c41e ("RDMA/rxe: Protext kernel index from user space")
Signed-off-by: Xiao Yang <yangx.jy@fujitsu.com>
---
 drivers/infiniband/sw/rxe/rxe_verbs.c | 29 ++++++---------------------
 1 file changed, 6 insertions(+), 23 deletions(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
index c223959ac174..cdded9f64910 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.c
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
@@ -632,7 +632,6 @@ static int post_one_send(struct rxe_qp *qp, const struct ib_send_wr *ibwr,
 	struct rxe_sq *sq = &qp->sq;
 	struct rxe_send_wqe *send_wqe;
 	unsigned long flags;
-	int full;
 
 	err = validate_send_wr(qp, ibwr, mask, length);
 	if (err)
@@ -640,27 +639,16 @@ static int post_one_send(struct rxe_qp *qp, const struct ib_send_wr *ibwr,
 
 	spin_lock_irqsave(&qp->sq.sq_lock, flags);
 
-	if (qp->is_user)
-		full = queue_full(sq->queue, QUEUE_TYPE_FROM_USER);
-	else
-		full = queue_full(sq->queue, QUEUE_TYPE_KERNEL);
-
-	if (unlikely(full)) {
+	if (unlikely(queue_full(sq->queue, QUEUE_TYPE_KERNEL))) {
 		spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
 		return -ENOMEM;
 	}
 
-	if (qp->is_user)
-		send_wqe = producer_addr(sq->queue, QUEUE_TYPE_FROM_USER);
-	else
-		send_wqe = producer_addr(sq->queue, QUEUE_TYPE_KERNEL);
+	send_wqe = producer_addr(sq->queue, QUEUE_TYPE_KERNEL);
 
 	init_send_wqe(qp, ibwr, mask, length, send_wqe);
 
-	if (qp->is_user)
-		advance_producer(sq->queue, QUEUE_TYPE_FROM_USER);
-	else
-		advance_producer(sq->queue, QUEUE_TYPE_KERNEL);
+	advance_producer(sq->queue, QUEUE_TYPE_KERNEL);
 
 	spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
 
@@ -852,18 +840,13 @@ static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
 
 	spin_lock_irqsave(&cq->cq_lock, flags);
 	for (i = 0; i < num_entries; i++) {
-		if (cq->is_user)
-			cqe = queue_head(cq->queue, QUEUE_TYPE_TO_USER);
-		else
-			cqe = queue_head(cq->queue, QUEUE_TYPE_KERNEL);
+		cqe = queue_head(cq->queue, QUEUE_TYPE_KERNEL);
 		if (!cqe)
 			break;
 
 		memcpy(wc++, &cqe->ibwc, sizeof(*wc));
-		if (cq->is_user)
-			advance_consumer(cq->queue, QUEUE_TYPE_TO_USER);
-		else
-			advance_consumer(cq->queue, QUEUE_TYPE_KERNEL);
+
+		advance_consumer(cq->queue, QUEUE_TYPE_KERNEL);
 	}
 	spin_unlock_irqrestore(&cq->cq_lock, flags);
 
-- 
2.25.1




  reply	other threads:[~2021-08-23  8:51 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-23  9:22 [PATCH 0/3] RDMA/rxe: Do some cleanup Xiao Yang
2021-08-23  9:22 ` Xiao Yang [this message]
2021-08-23  9:22 ` [PATCH 2/3] RDMA/rxe: Remove the common is_user member of struct rxe_qp Xiao Yang
2021-08-23  9:22 ` [PATCH 3/3] RDMA/rxe: Change the is_user member of struct rxe_cq to bool Xiao Yang
2021-08-27 14:25 ` [PATCH 0/3] RDMA/rxe: Do some cleanup Jason Gunthorpe
2021-08-30  1:41   ` yangx.jy
  -- strict thread matches above, loose matches on Subject: below --
2021-08-23  9:08 Xiao Yang
2021-08-23  9:08 ` [PATCH 1/3] RDMA/rxe: Remove unnecessary check for qp->is_user/cq->is_user Xiao Yang

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