6.1-stable review patch. If anyone has any objections, please let me know.
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From: Geetha sowjanya gakula@marvell.com
[ Upstream commit 3423ca23e08bf285a324237abe88e7e7d9becfe6 ]
On interface down, the pending SQEs in the NIX get dropped or drained out during SMQ flush. But skb's pointed by these SQEs never get free or updated to the stack as respective CQE never get added. This patch fixes the issue by freeing all valid skb's in SQ SG list.
Fixes: b1bc8457e9d0 ("octeontx2-pf: Cleanup all receive buffers in SG descriptor") Signed-off-by: Geetha sowjanya gakula@marvell.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- .../marvell/octeontx2/nic/otx2_common.c | 15 +++---- .../marvell/octeontx2/nic/otx2_common.h | 1 + .../ethernet/marvell/octeontx2/nic/otx2_pf.c | 1 + .../marvell/octeontx2/nic/otx2_txrx.c | 42 +++++++++++++++++++ 4 files changed, 49 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c index c76dad78c26eb..0f896f606c3e6 100644 --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c @@ -797,7 +797,6 @@ void otx2_sqb_flush(struct otx2_nic *pfvf) int qidx, sqe_tail, sqe_head; struct otx2_snd_queue *sq; u64 incr, *ptr, val; - int timeout = 1000;
ptr = (u64 *)otx2_get_regaddr(pfvf, NIX_LF_SQ_OP_STATUS); for (qidx = 0; qidx < otx2_get_total_tx_queues(pfvf); qidx++) { @@ -806,15 +805,11 @@ void otx2_sqb_flush(struct otx2_nic *pfvf) continue;
incr = (u64)qidx << 32; - while (timeout) { - val = otx2_atomic64_add(incr, ptr); - sqe_head = (val >> 20) & 0x3F; - sqe_tail = (val >> 28) & 0x3F; - if (sqe_head == sqe_tail) - break; - usleep_range(1, 3); - timeout--; - } + val = otx2_atomic64_add(incr, ptr); + sqe_head = (val >> 20) & 0x3F; + sqe_tail = (val >> 28) & 0x3F; + if (sqe_head != sqe_tail) + usleep_range(50, 60); } }
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h index 876a7b51b8e51..efd66224b3dbf 100644 --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h @@ -933,6 +933,7 @@ int otx2_txschq_config(struct otx2_nic *pfvf, int lvl, int prio, bool pfc_en); int otx2_txsch_alloc(struct otx2_nic *pfvf); void otx2_txschq_stop(struct otx2_nic *pfvf); void otx2_txschq_free_one(struct otx2_nic *pfvf, u16 lvl, u16 schq); +void otx2_free_pending_sqe(struct otx2_nic *pfvf); void otx2_sqb_flush(struct otx2_nic *pfvf); int otx2_alloc_rbuf(struct otx2_nic *pfvf, struct otx2_pool *pool, dma_addr_t *dma); diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c index c558c9b64f5be..c724131172f3f 100644 --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c @@ -1596,6 +1596,7 @@ static void otx2_free_hw_resources(struct otx2_nic *pf) else otx2_cleanup_tx_cqes(pf, cq); } + otx2_free_pending_sqe(pf);
otx2_free_sq_res(pf);
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c index d005434e1e037..20d801d30c732 100644 --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c @@ -1224,9 +1224,11 @@ void otx2_cleanup_rx_cqes(struct otx2_nic *pfvf, struct otx2_cq_queue *cq)
void otx2_cleanup_tx_cqes(struct otx2_nic *pfvf, struct otx2_cq_queue *cq) { + int tx_pkts = 0, tx_bytes = 0; struct sk_buff *skb = NULL; struct otx2_snd_queue *sq; struct nix_cqe_tx_s *cqe; + struct netdev_queue *txq; int processed_cqe = 0; struct sg_list *sg; int qidx; @@ -1247,12 +1249,20 @@ void otx2_cleanup_tx_cqes(struct otx2_nic *pfvf, struct otx2_cq_queue *cq) sg = &sq->sg[cqe->comp.sqe_id]; skb = (struct sk_buff *)sg->skb; if (skb) { + tx_bytes += skb->len; + tx_pkts++; otx2_dma_unmap_skb_frags(pfvf, sg); dev_kfree_skb_any(skb); sg->skb = (u64)NULL; } }
+ if (likely(tx_pkts)) { + if (qidx >= pfvf->hw.tx_queues) + qidx -= pfvf->hw.xdp_queues; + txq = netdev_get_tx_queue(pfvf->netdev, qidx); + netdev_tx_completed_queue(txq, tx_pkts, tx_bytes); + } /* Free CQEs to HW */ otx2_write64(pfvf, NIX_LF_CQ_OP_DOOR, ((u64)cq->cq_idx << 32) | processed_cqe); @@ -1279,6 +1289,38 @@ int otx2_rxtx_enable(struct otx2_nic *pfvf, bool enable) return err; }
+void otx2_free_pending_sqe(struct otx2_nic *pfvf) +{ + int tx_pkts = 0, tx_bytes = 0; + struct sk_buff *skb = NULL; + struct otx2_snd_queue *sq; + struct netdev_queue *txq; + struct sg_list *sg; + int sq_idx, sqe; + + for (sq_idx = 0; sq_idx < pfvf->hw.tx_queues; sq_idx++) { + sq = &pfvf->qset.sq[sq_idx]; + for (sqe = 0; sqe < sq->sqe_cnt; sqe++) { + sg = &sq->sg[sqe]; + skb = (struct sk_buff *)sg->skb; + if (skb) { + tx_bytes += skb->len; + tx_pkts++; + otx2_dma_unmap_skb_frags(pfvf, sg); + dev_kfree_skb_any(skb); + sg->skb = (u64)NULL; + } + } + + if (!tx_pkts) + continue; + txq = netdev_get_tx_queue(pfvf->netdev, sq_idx); + netdev_tx_completed_queue(txq, tx_pkts, tx_bytes); + tx_pkts = 0; + tx_bytes = 0; + } +} + static void otx2_xdp_sqe_add_sg(struct otx2_snd_queue *sq, u64 dma_addr, int len, int *offset) {