From patchwork Mon Jul 29 14:30:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Paul Barker X-Patchwork-Id: 13745041 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4EEF4C52CDC for ; Mon, 29 Jul 2024 14:30:28 +0000 (UTC) Received: from relmlie5.idc.renesas.com (relmlie5.idc.renesas.com [210.160.252.171]) by mx.groups.io with SMTP id smtpd.web11.57657.1722263418601965874 for ; Mon, 29 Jul 2024 07:30:19 -0700 Authentication-Results: mx.groups.io; dkim=none (message not signed); spf=pass (domain: bp.renesas.com, ip: 210.160.252.171, mailfrom: paul.barker.ct@bp.renesas.com) X-IronPort-AV: E=Sophos;i="6.09,246,1716217200"; d="scan'208";a="213905627" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 29 Jul 2024 23:30:17 +0900 Received: from ree-du1sdd5.ree.adwin.renesas.com (unknown [10.226.105.7]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id ED622400EF68; Mon, 29 Jul 2024 23:30:15 +0900 (JST) From: Paul Barker To: cip-dev@lists.cip-project.org, Nobuhiro Iwamatsu , Pavel Machek Cc: Biju Das , Lad Prabhakar Subject: [PATCH 5.10.y cip 01/11] ravb: Group descriptor types used in Rx ring Date: Mon, 29 Jul 2024 14:30:01 +0000 Message-Id: <20240729143011.1920068-2-paul.barker.ct@bp.renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240729143011.1920068-1-paul.barker.ct@bp.renesas.com> References: <20240729143011.1920068-1-paul.barker.ct@bp.renesas.com> MIME-Version: 1.0 List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Mon, 29 Jul 2024 14:30:28 -0000 X-Groupsio-URL: https://lists.cip-project.org/g/cip-dev/message/16634 From: Niklas Söderlund commit 4123c3fbf8632e5c553222bf1c10b3a3e0a8dc06 upstream. The Rx ring can either be made up of normal or extended descriptors, not a mix of the two at the same time. Make this explicit by grouping the two variables in a rx_ring union. The extension of the storage for more than one queue of normal descriptors from a single to NUM_RX_QUEUE queues have no practical effect. But aids in making the code readable as the code that uses it already piggyback on other members of struct ravb_private that are arrays of max length NUM_RX_QUEUE, e.g. rx_desc_dma. This will also make further refactoring easier. While at it, rename the normal descriptor Rx ring to make it clear it's not strictly related to the GbEthernet E-MAC IP found in RZ/G2L, normal descriptors could be used on R-Car SoCs too. Signed-off-by: Niklas Söderlund Reviewed-by: Paul Barker Reviewed-by: Sergey Shtylyov Signed-off-by: David S. Miller Signed-off-by: Paul Barker --- drivers/net/ethernet/renesas/ravb.h | 6 ++- drivers/net/ethernet/renesas/ravb_main.c | 57 ++++++++++++------------ 2 files changed, 33 insertions(+), 30 deletions(-) diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h index 82fea6f9a3f6..bc39fe0ad50a 100644 --- a/drivers/net/ethernet/renesas/ravb.h +++ b/drivers/net/ethernet/renesas/ravb.h @@ -1092,8 +1092,10 @@ struct ravb_private { struct ravb_desc *desc_bat; dma_addr_t rx_desc_dma[NUM_RX_QUEUE]; dma_addr_t tx_desc_dma[NUM_TX_QUEUE]; - struct ravb_rx_desc *gbeth_rx_ring; - struct ravb_ex_rx_desc *rx_ring[NUM_RX_QUEUE]; + union { + struct ravb_rx_desc *desc; + struct ravb_ex_rx_desc *ex_desc; + } rx_ring[NUM_RX_QUEUE]; struct ravb_tx_desc *tx_ring[NUM_TX_QUEUE]; void *tx_align[NUM_TX_QUEUE]; struct sk_buff *rx_1st_skb; diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index e86b4a006dc3..5a5023173403 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -239,11 +239,11 @@ static void ravb_rx_ring_free_gbeth(struct net_device *ndev, int q) unsigned int ring_size; unsigned int i; - if (!priv->gbeth_rx_ring) + if (!priv->rx_ring[q].desc) return; for (i = 0; i < priv->num_rx_ring[q]; i++) { - struct ravb_rx_desc *desc = &priv->gbeth_rx_ring[i]; + struct ravb_rx_desc *desc = &priv->rx_ring[q].desc[i]; if (!dma_mapping_error(ndev->dev.parent, le32_to_cpu(desc->dptr))) @@ -253,9 +253,9 @@ static void ravb_rx_ring_free_gbeth(struct net_device *ndev, int q) DMA_FROM_DEVICE); } ring_size = sizeof(struct ravb_rx_desc) * (priv->num_rx_ring[q] + 1); - dma_free_coherent(ndev->dev.parent, ring_size, priv->gbeth_rx_ring, + dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q].desc, priv->rx_desc_dma[q]); - priv->gbeth_rx_ring = NULL; + priv->rx_ring[q].desc = NULL; } static void ravb_rx_ring_free_rcar(struct net_device *ndev, int q) @@ -264,11 +264,11 @@ static void ravb_rx_ring_free_rcar(struct net_device *ndev, int q) unsigned int ring_size; unsigned int i; - if (!priv->rx_ring[q]) + if (!priv->rx_ring[q].ex_desc) return; for (i = 0; i < priv->num_rx_ring[q]; i++) { - struct ravb_ex_rx_desc *desc = &priv->rx_ring[q][i]; + struct ravb_ex_rx_desc *desc = &priv->rx_ring[q].ex_desc[i]; if (!dma_mapping_error(ndev->dev.parent, le32_to_cpu(desc->dptr))) @@ -279,9 +279,9 @@ static void ravb_rx_ring_free_rcar(struct net_device *ndev, int q) } ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1); - dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q], + dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q].ex_desc, priv->rx_desc_dma[q]); - priv->rx_ring[q] = NULL; + priv->rx_ring[q].ex_desc = NULL; } /* Free skb's and DMA buffers for Ethernet AVB */ @@ -333,11 +333,11 @@ static void ravb_rx_ring_format_gbeth(struct net_device *ndev, int q) unsigned int i; rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q]; - memset(priv->gbeth_rx_ring, 0, rx_ring_size); + memset(priv->rx_ring[q].desc, 0, rx_ring_size); /* Build RX ring buffer */ for (i = 0; i < priv->num_rx_ring[q]; i++) { /* RX descriptor */ - rx_desc = &priv->gbeth_rx_ring[i]; + rx_desc = &priv->rx_ring[q].desc[i]; rx_desc->ds_cc = cpu_to_le16(GBETH_RX_DESC_DATA_SIZE); dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data, GBETH_RX_BUFF_MAX, @@ -350,7 +350,7 @@ static void ravb_rx_ring_format_gbeth(struct net_device *ndev, int q) rx_desc->dptr = cpu_to_le32(dma_addr); rx_desc->die_dt = DT_FEMPTY; } - rx_desc = &priv->gbeth_rx_ring[i]; + rx_desc = &priv->rx_ring[q].desc[i]; rx_desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]); rx_desc->die_dt = DT_LINKFIX; /* type */ } @@ -363,11 +363,11 @@ static void ravb_rx_ring_format_rcar(struct net_device *ndev, int q) dma_addr_t dma_addr; unsigned int i; - memset(priv->rx_ring[q], 0, rx_ring_size); + memset(priv->rx_ring[q].ex_desc, 0, rx_ring_size); /* Build RX ring buffer */ for (i = 0; i < priv->num_rx_ring[q]; i++) { /* RX descriptor */ - rx_desc = &priv->rx_ring[q][i]; + rx_desc = &priv->rx_ring[q].ex_desc[i]; rx_desc->ds_cc = cpu_to_le16(RX_BUF_SZ); dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data, RX_BUF_SZ, @@ -380,7 +380,7 @@ static void ravb_rx_ring_format_rcar(struct net_device *ndev, int q) rx_desc->dptr = cpu_to_le32(dma_addr); rx_desc->die_dt = DT_FEMPTY; } - rx_desc = &priv->rx_ring[q][i]; + rx_desc = &priv->rx_ring[q].ex_desc[i]; rx_desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]); rx_desc->die_dt = DT_LINKFIX; /* type */ } @@ -435,10 +435,10 @@ static void *ravb_alloc_rx_desc_gbeth(struct net_device *ndev, int q) ring_size = sizeof(struct ravb_rx_desc) * (priv->num_rx_ring[q] + 1); - priv->gbeth_rx_ring = dma_alloc_coherent(ndev->dev.parent, ring_size, - &priv->rx_desc_dma[q], - GFP_KERNEL); - return priv->gbeth_rx_ring; + priv->rx_ring[q].desc = dma_alloc_coherent(ndev->dev.parent, ring_size, + &priv->rx_desc_dma[q], + GFP_KERNEL); + return priv->rx_ring[q].desc; } static void *ravb_alloc_rx_desc_rcar(struct net_device *ndev, int q) @@ -448,10 +448,11 @@ static void *ravb_alloc_rx_desc_rcar(struct net_device *ndev, int q) ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1); - priv->rx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size, - &priv->rx_desc_dma[q], - GFP_KERNEL); - return priv->rx_ring[q]; + priv->rx_ring[q].ex_desc = dma_alloc_coherent(ndev->dev.parent, + ring_size, + &priv->rx_desc_dma[q], + GFP_KERNEL); + return priv->rx_ring[q].ex_desc; } /* Init skb and descriptor buffer for Ethernet AVB */ @@ -828,7 +829,7 @@ static bool ravb_rx_gbeth(struct net_device *ndev, int *quota, int q) limit = priv->dirty_rx[q] + priv->num_rx_ring[q] - priv->cur_rx[q]; stats = &priv->stats[q]; - desc = &priv->gbeth_rx_ring[entry]; + desc = &priv->rx_ring[q].desc[entry]; for (i = 0; i < limit && rx_packets < *quota && desc->die_dt != DT_FEMPTY; i++) { /* Descriptor type must be checked before all other reads */ dma_rmb(); @@ -899,13 +900,13 @@ static bool ravb_rx_gbeth(struct net_device *ndev, int *quota, int q) } entry = (++priv->cur_rx[q]) % priv->num_rx_ring[q]; - desc = &priv->gbeth_rx_ring[entry]; + desc = &priv->rx_ring[q].desc[entry]; } /* Refill the RX ring buffers. */ for (; priv->cur_rx[q] - priv->dirty_rx[q] > 0; priv->dirty_rx[q]++) { entry = priv->dirty_rx[q] % priv->num_rx_ring[q]; - desc = &priv->gbeth_rx_ring[entry]; + desc = &priv->rx_ring[q].desc[entry]; desc->ds_cc = cpu_to_le16(GBETH_RX_DESC_DATA_SIZE); if (!priv->rx_skb[q][entry]) { @@ -955,7 +956,7 @@ static bool ravb_rx_rcar(struct net_device *ndev, int *quota, int q) boguscnt = min(boguscnt, *quota); limit = boguscnt; - desc = &priv->rx_ring[q][entry]; + desc = &priv->rx_ring[q].ex_desc[entry]; while (desc->die_dt != DT_FEMPTY) { /* Descriptor type must be checked before all other reads */ dma_rmb(); @@ -1015,13 +1016,13 @@ static bool ravb_rx_rcar(struct net_device *ndev, int *quota, int q) } entry = (++priv->cur_rx[q]) % priv->num_rx_ring[q]; - desc = &priv->rx_ring[q][entry]; + desc = &priv->rx_ring[q].ex_desc[entry]; } /* Refill the RX ring buffers. */ for (; priv->cur_rx[q] - priv->dirty_rx[q] > 0; priv->dirty_rx[q]++) { entry = priv->dirty_rx[q] % priv->num_rx_ring[q]; - desc = &priv->rx_ring[q][entry]; + desc = &priv->rx_ring[q].ex_desc[entry]; desc->ds_cc = cpu_to_le16(RX_BUF_SZ); if (!priv->rx_skb[q][entry]) {