From patchwork Mon Nov 27 11:53:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 13469454 X-Patchwork-Delegate: kuba@kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 402FE13A; Mon, 27 Nov 2023 03:53:42 -0800 (PST) X-IronPort-AV: E=Sophos;i="6.04,230,1695654000"; d="scan'208";a="188253120" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 27 Nov 2023 20:53:40 +0900 Received: from localhost.localdomain (unknown [10.166.13.99]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 0C8C6400C4CD; Mon, 27 Nov 2023 20:53:40 +0900 (JST) From: Yoshihiro Shimoda To: s.shtylyov@omp.ru, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH net-next 3/9] net: rswitch: Use build_skb() for RX Date: Mon, 27 Nov 2023 20:53:28 +0900 Message-Id: <20231127115334.3670790-4-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231127115334.3670790-1-yoshihiro.shimoda.uh@renesas.com> References: <20231127115334.3670790-1-yoshihiro.shimoda.uh@renesas.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org If this hardware receives a jumbo frame like 2KiB or more, it will be split into multiple queues. In near the future, to support this, use build_skb() instead of netdev_alloc_skb_ip_align(). Signed-off-by: Yoshihiro Shimoda --- drivers/net/ethernet/renesas/rswitch.c | 72 +++++++++++++++----------- drivers/net/ethernet/renesas/rswitch.h | 19 ++++++- 2 files changed, 58 insertions(+), 33 deletions(-) diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c index 0928003ad245..8337c860eb9a 100644 --- a/drivers/net/ethernet/renesas/rswitch.c +++ b/drivers/net/ethernet/renesas/rswitch.c @@ -235,19 +235,18 @@ static bool rswitch_is_queue_rxed(struct rswitch_gwca_queue *gq) return false; } -static int rswitch_gwca_queue_alloc_skb(struct rswitch_gwca_queue *gq, - unsigned int start_index, - unsigned int num) +static int rswitch_gwca_queue_alloc_rx_buf(struct rswitch_gwca_queue *gq, + unsigned int start_index, + unsigned int num) { unsigned int i, index; for (i = 0; i < num; i++) { index = (i + start_index) % gq->ring_size; - if (gq->skbs[index]) + if (gq->rx_bufs[index]) continue; - gq->skbs[index] = netdev_alloc_skb_ip_align(gq->ndev, - PKT_BUF_SZ + RSWITCH_ALIGN - 1); - if (!gq->skbs[index]) + gq->rx_bufs[index] = netdev_alloc_frag(RSWITCH_BUF_SIZE); + if (!gq->rx_bufs[index]) goto err; } @@ -256,8 +255,8 @@ static int rswitch_gwca_queue_alloc_skb(struct rswitch_gwca_queue *gq, err: for (; i-- > 0; ) { index = (i + start_index) % gq->ring_size; - dev_kfree_skb(gq->skbs[index]); - gq->skbs[index] = NULL; + skb_free_frag(gq->rx_bufs[index]); + gq->rx_bufs[index] = NULL; } return -ENOMEM; @@ -275,16 +274,17 @@ static void rswitch_gwca_queue_free(struct net_device *ndev, gq->rx_ring = NULL; for (i = 0; i < gq->ring_size; i++) - dev_kfree_skb(gq->skbs[i]); + skb_free_frag(gq->rx_bufs[i]); + kfree(gq->rx_bufs); + gq->rx_bufs = NULL; } else { dma_free_coherent(ndev->dev.parent, sizeof(struct rswitch_ext_desc) * (gq->ring_size + 1), gq->tx_ring, gq->ring_dma); gq->tx_ring = NULL; + kfree(gq->skbs); + gq->skbs = NULL; } - - kfree(gq->skbs); - gq->skbs = NULL; } static void rswitch_gwca_ts_queue_free(struct rswitch_private *priv) @@ -308,17 +308,19 @@ static int rswitch_gwca_queue_alloc(struct net_device *ndev, gq->ring_size = ring_size; gq->ndev = ndev; - gq->skbs = kcalloc(gq->ring_size, sizeof(*gq->skbs), GFP_KERNEL); - if (!gq->skbs) - return -ENOMEM; - if (!dir_tx) { - rswitch_gwca_queue_alloc_skb(gq, 0, gq->ring_size); + gq->rx_bufs = kcalloc(gq->ring_size, sizeof(*gq->rx_bufs), GFP_KERNEL); + if (!gq->rx_bufs) + goto out; + rswitch_gwca_queue_alloc_rx_buf(gq, 0, gq->ring_size); gq->rx_ring = dma_alloc_coherent(ndev->dev.parent, sizeof(struct rswitch_ext_ts_desc) * (gq->ring_size + 1), &gq->ring_dma, GFP_KERNEL); } else { + gq->skbs = kcalloc(gq->ring_size, sizeof(*gq->skbs), GFP_KERNEL); + if (!gq->skbs) + return -ENOMEM; gq->tx_ring = dma_alloc_coherent(ndev->dev.parent, sizeof(struct rswitch_ext_desc) * (gq->ring_size + 1), &gq->ring_dma, GFP_KERNEL); @@ -367,12 +369,13 @@ static int rswitch_gwca_queue_format(struct net_device *ndev, for (i = 0, desc = gq->tx_ring; i < gq->ring_size; i++, desc++) { if (!gq->dir_tx) { dma_addr = dma_map_single(ndev->dev.parent, - gq->skbs[i]->data, PKT_BUF_SZ, + gq->rx_bufs[i] + RSWITCH_HEADROOM, + RSWITCH_MAP_BUF_SIZE, DMA_FROM_DEVICE); if (dma_mapping_error(ndev->dev.parent, dma_addr)) goto err; - desc->desc.info_ds = cpu_to_le16(PKT_BUF_SZ); + desc->desc.info_ds = cpu_to_le16(RSWITCH_DESC_BUF_SIZE); rswitch_desc_set_dptr(&desc->desc, dma_addr); desc->desc.die_dt = DT_FEMPTY | DIE; } else { @@ -395,8 +398,8 @@ static int rswitch_gwca_queue_format(struct net_device *ndev, if (!gq->dir_tx) { for (desc = gq->tx_ring; i-- > 0; desc++) { dma_addr = rswitch_desc_get_dptr(&desc->desc); - dma_unmap_single(ndev->dev.parent, dma_addr, PKT_BUF_SZ, - DMA_FROM_DEVICE); + dma_unmap_single(ndev->dev.parent, dma_addr, + RSWITCH_MAP_BUF_SIZE, DMA_FROM_DEVICE); } } @@ -433,12 +436,13 @@ static int rswitch_gwca_queue_ext_ts_fill(struct net_device *ndev, desc = &gq->rx_ring[index]; if (!gq->dir_tx) { dma_addr = dma_map_single(ndev->dev.parent, - gq->skbs[index]->data, PKT_BUF_SZ, + gq->rx_bufs[index] + RSWITCH_HEADROOM, + RSWITCH_MAP_BUF_SIZE, DMA_FROM_DEVICE); if (dma_mapping_error(ndev->dev.parent, dma_addr)) goto err; - desc->desc.info_ds = cpu_to_le16(PKT_BUF_SZ); + desc->desc.info_ds = cpu_to_le16(RSWITCH_DESC_BUF_SIZE); rswitch_desc_set_dptr(&desc->desc, dma_addr); dma_wmb(); desc->desc.die_dt = DT_FEMPTY | DIE; @@ -456,8 +460,8 @@ static int rswitch_gwca_queue_ext_ts_fill(struct net_device *ndev, index = (i + start_index) % gq->ring_size; desc = &gq->rx_ring[index]; dma_addr = rswitch_desc_get_dptr(&desc->desc); - dma_unmap_single(ndev->dev.parent, dma_addr, PKT_BUF_SZ, - DMA_FROM_DEVICE); + dma_unmap_single(ndev->dev.parent, dma_addr, + RSWITCH_MAP_BUF_SIZE, DMA_FROM_DEVICE); } } @@ -724,10 +728,15 @@ static bool rswitch_rx(struct net_device *ndev, int *quota) while ((desc->desc.die_dt & DT_MASK) != DT_FEMPTY) { dma_rmb(); pkt_len = le16_to_cpu(desc->desc.info_ds) & RX_DS; - skb = gq->skbs[gq->cur]; - gq->skbs[gq->cur] = NULL; dma_addr = rswitch_desc_get_dptr(&desc->desc); - dma_unmap_single(ndev->dev.parent, dma_addr, PKT_BUF_SZ, DMA_FROM_DEVICE); + dma_unmap_single(ndev->dev.parent, dma_addr, + RSWITCH_MAP_BUF_SIZE, DMA_FROM_DEVICE); + skb = build_skb(gq->rx_bufs[gq->cur], RSWITCH_BUF_SIZE); + if (!skb) + goto out; + skb_reserve(skb, RSWITCH_HEADROOM); + skb_put(skb, pkt_len); + get_ts = rdev->priv->ptp_priv->tstamp_rx_ctrl & RCAR_GEN4_RXTSTAMP_TYPE_V2_L2_EVENT; if (get_ts) { struct skb_shared_hwtstamps *shhwtstamps; @@ -739,12 +748,13 @@ static bool rswitch_rx(struct net_device *ndev, int *quota) ts.tv_nsec = __le32_to_cpu(desc->ts_nsec & cpu_to_le32(0x3fffffff)); shhwtstamps->hwtstamp = timespec64_to_ktime(ts); } - skb_put(skb, pkt_len); skb->protocol = eth_type_trans(skb, ndev); napi_gro_receive(&rdev->napi, skb); rdev->ndev->stats.rx_packets++; rdev->ndev->stats.rx_bytes += pkt_len; +out: + gq->rx_bufs[gq->cur] = NULL; gq->cur = rswitch_next_queue_index(gq, true, 1); desc = &gq->rx_ring[gq->cur]; @@ -753,7 +763,7 @@ static bool rswitch_rx(struct net_device *ndev, int *quota) } num = rswitch_get_num_cur_queues(gq); - ret = rswitch_gwca_queue_alloc_skb(gq, gq->dirty, num); + ret = rswitch_gwca_queue_alloc_rx_buf(gq, gq->dirty, num); if (ret < 0) goto err; ret = rswitch_gwca_queue_ext_ts_fill(ndev, gq, gq->dirty, num); diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h index f1c7f7cdefc2..a407d85dcfad 100644 --- a/drivers/net/ethernet/renesas/rswitch.h +++ b/drivers/net/ethernet/renesas/rswitch.h @@ -29,8 +29,13 @@ #define RX_RING_SIZE 1024 #define TS_RING_SIZE (TX_RING_SIZE * RSWITCH_NUM_PORTS) -#define PKT_BUF_SZ 1584 +#define RSWITCH_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN) +#define RSWITCH_DESC_BUF_SIZE 2048 +#define RSWITCH_TAILROOM SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) #define RSWITCH_ALIGN 128 +#define RSWITCH_BUF_SIZE (RSWITCH_HEADROOM + RSWITCH_DESC_BUF_SIZE + \ + RSWITCH_TAILROOM + RSWITCH_ALIGN) +#define RSWITCH_MAP_BUF_SIZE (RSWITCH_BUF_SIZE - RSWITCH_HEADROOM) #define RSWITCH_MAX_CTAG_PCP 7 #define RSWITCH_TIMEOUT_US 100000 @@ -945,8 +950,18 @@ struct rswitch_gwca_queue { /* For [rt]x_ring */ unsigned int index; bool dir_tx; - struct sk_buff **skbs; struct net_device *ndev; /* queue to ndev for irq */ + + union { + /* For TX */ + struct { + struct sk_buff **skbs; + }; + /* For RX */ + struct { + void **rx_bufs; + }; + }; }; struct rswitch_gwca_ts_info {