Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934494AbdC3PfX (ORCPT ); Thu, 30 Mar 2017 11:35:23 -0400 Received: from szxga03-in.huawei.com ([45.249.212.189]:4921 "EHLO dggrg03-dlp.huawei.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S934735AbdC3PdG (ORCPT ); Thu, 30 Mar 2017 11:33:06 -0400 From: Salil Mehta To: CC: , , , , , , lipeng Subject: [PATCH net 09/19] net: hns: Replace netif_tx_lock to ring spin lock Date: Thu, 30 Mar 2017 16:30:56 +0100 Message-ID: <20170330153106.14344-10-salil.mehta@huawei.com> X-Mailer: git-send-email 2.8.3 In-Reply-To: <20170330153106.14344-1-salil.mehta@huawei.com> References: <20170330153106.14344-1-salil.mehta@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.203.181.152] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090205.58DD2522.0146,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 963140ef54beb45f63e7630ba6d08739 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4184 Lines: 119 From: lipeng netif_tx_lock is a global spin lock, it will take affect in all rings in the netdevice. In tx_poll_one process, it can only lock the current ring, in this case, we define a spin lock in hnae_ring struct for it. Signed-off-by: lipeng reviewed-by: Yisen Zhuang Signed-off-by: Salil Mehta --- drivers/net/ethernet/hisilicon/hns/hnae.c | 1 + drivers/net/ethernet/hisilicon/hns/hnae.h | 3 +++ drivers/net/ethernet/hisilicon/hns/hns_enet.c | 21 +++++++++++---------- 3 files changed, 15 insertions(+), 10 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns/hnae.c b/drivers/net/ethernet/hisilicon/hns/hnae.c index 78af663..513c257 100644 --- a/drivers/net/ethernet/hisilicon/hns/hnae.c +++ b/drivers/net/ethernet/hisilicon/hns/hnae.c @@ -196,6 +196,7 @@ hnae_init_ring(struct hnae_queue *q, struct hnae_ring *ring, int flags) ring->q = q; ring->flags = flags; + spin_lock_init(&ring->lock); assert(!ring->desc && !ring->desc_cb && !ring->desc_dma_addr); /* not matter for tx or rx ring, the ntc and ntc start from 0 */ diff --git a/drivers/net/ethernet/hisilicon/hns/hnae.h b/drivers/net/ethernet/hisilicon/hns/hnae.h index ad79a76..987880b 100644 --- a/drivers/net/ethernet/hisilicon/hns/hnae.h +++ b/drivers/net/ethernet/hisilicon/hns/hnae.h @@ -275,6 +275,9 @@ struct hnae_ring { /* statistic */ struct ring_stats stats; + /* ring lock for poll one */ + spinlock_t lock; + dma_addr_t desc_dma_addr; u32 buf_size; /* size for hnae_desc->addr, preset by AE */ u16 desc_num; /* total number of desc */ diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c index 2a12764..c4aa095 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c @@ -924,12 +924,13 @@ static int is_valid_clean_head(struct hnae_ring *ring, int h) /* netif_tx_lock will turn down the performance, set only when necessary */ #ifdef CONFIG_NET_POLL_CONTROLLER -#define NETIF_TX_LOCK(ndev) netif_tx_lock(ndev) -#define NETIF_TX_UNLOCK(ndev) netif_tx_unlock(ndev) +#define NETIF_TX_LOCK(ring) spin_lock(&ring->lock) +#define NETIF_TX_UNLOCK(ring) spin_unlock(&ring->lock) #else -#define NETIF_TX_LOCK(ndev) -#define NETIF_TX_UNLOCK(ndev) +#define NETIF_TX_LOCK(ring) +#define NETIF_TX_UNLOCK(ring) #endif + /* reclaim all desc in one budget * return error or number of desc left */ @@ -943,13 +944,13 @@ static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data, int head; int bytes, pkts; - NETIF_TX_LOCK(ndev); + NETIF_TX_LOCK(ring); head = readl_relaxed(ring->io_base + RCB_REG_HEAD); rmb(); /* make sure head is ready before touch any data */ if (is_ring_empty(ring) || head == ring->next_to_clean) { - NETIF_TX_UNLOCK(ndev); + NETIF_TX_UNLOCK(ring); return 0; /* no data to poll */ } @@ -957,7 +958,7 @@ static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data, netdev_err(ndev, "wrong head (%d, %d-%d)\n", head, ring->next_to_use, ring->next_to_clean); ring->stats.io_err_cnt++; - NETIF_TX_UNLOCK(ndev); + NETIF_TX_UNLOCK(ring); return -EIO; } @@ -969,7 +970,7 @@ static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data, prefetch(&ring->desc_cb[ring->next_to_clean]); } - NETIF_TX_UNLOCK(ndev); + NETIF_TX_UNLOCK(ring); dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index); netdev_tx_completed_queue(dev_queue, pkts, bytes); @@ -1030,7 +1031,7 @@ static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data) int head; int bytes, pkts; - NETIF_TX_LOCK(ndev); + NETIF_TX_LOCK(ring); head = ring->next_to_use; /* ntu :soft setted ring position*/ bytes = 0; @@ -1038,7 +1039,7 @@ static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data) while (head != ring->next_to_clean) hns_nic_reclaim_one_desc(ring, &bytes, &pkts); - NETIF_TX_UNLOCK(ndev); + NETIF_TX_UNLOCK(ring); dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index); netdev_tx_reset_queue(dev_queue); -- 2.7.4