From nobody Fri Dec 19 20:39:58 2025 Received: from lelvem-ot02.ext.ti.com (lelvem-ot02.ext.ti.com [198.47.23.235]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D2B6030C36F; Tue, 14 Oct 2025 10:57:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.47.23.235 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760439437; cv=none; b=VcdWRN9Ga/v2FkIlnL7sGzeZwwsCJZXlGicTGptRz1L6J6phcOWTXXYRKRTutjbqHAMkcZ4sSAll5+x0ce3gNM+SNlhKNrgdj4JCknj5xGC7gnkrkexgItAOnr2GKKt1NQVmUUdSZwrQEgO86w31CYp4fEbZ9nL53RaDawluumg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760439437; c=relaxed/simple; bh=BTcqGG3yhxOnS6ejwicuqThYGfBp/Y/RvJeLELJoDOE=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=gxCuLdX42lRQSiOg20YQh9IlhOZVTSy05CY0HWhWnt0/SC6FxzdXuNVhk8PsbGwNMAj0HG8kfi/P2zjw2vHWQrN/qODsYfaLb9r+vBhwUcXFq9TT5fFtwkfyItGJzY9OWPxxctAkjXR3pCA0aK4aC9pq8hdwZbYuv+ruTc32Mik= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com; spf=pass smtp.mailfrom=ti.com; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b=MzNf5KuD; arc=none smtp.client-ip=198.47.23.235 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ti.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="MzNf5KuD" Received: from fllvem-sh03.itg.ti.com ([10.64.41.86]) by lelvem-ot02.ext.ti.com (8.15.2/8.15.2) with ESMTP id 59EAuVW81574224; Tue, 14 Oct 2025 05:56:31 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1760439391; bh=eefmzOzDRguFWe58LmJOHPY5HHwFLQ8o9LWD18ibBRM=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=MzNf5KuDeeWOsbfC01VLTCjrnVz3dxyyJQMbIN1M1c6njvA0008KHHxCpVPE9vaSH pEdatVXz4V7JSQ8gF7FMIw4yaC/y/GGDnYqFR5Qw+SAEkX62NafPFJjqCqzSdEXQci ApcvlLZoVmAUoKwVHkarx2rCMZtM+W/e0QwLBejs= Received: from DLEE212.ent.ti.com (dlee212.ent.ti.com [157.170.170.114]) by fllvem-sh03.itg.ti.com (8.18.1/8.18.1) with ESMTPS id 59EAuVeD1005239 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 14 Oct 2025 05:56:31 -0500 Received: from DLEE206.ent.ti.com (157.170.170.90) by DLEE212.ent.ti.com (157.170.170.114) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Tue, 14 Oct 2025 05:56:30 -0500 Received: from fllvem-mr07.itg.ti.com (10.64.41.89) by DLEE206.ent.ti.com (157.170.170.90) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20 via Frontend Transport; Tue, 14 Oct 2025 05:56:30 -0500 Received: from lelv0854.itg.ti.com (lelv0854.itg.ti.com [10.181.64.140]) by fllvem-mr07.itg.ti.com (8.18.1/8.18.1) with ESMTP id 59EAuUPQ2934595; Tue, 14 Oct 2025 05:56:30 -0500 Received: from localhost (meghana-pc.dhcp.ti.com [10.24.69.13] (may be forged)) by lelv0854.itg.ti.com (8.14.7/8.14.7) with ESMTP id 59EAuTRI010682; Tue, 14 Oct 2025 05:56:30 -0500 From: Meghana Malladi To: , , , , , , , , , , , , , , , CC: , , , , , , , , Vignesh Raghavendra , Roger Quadros , Subject: [PATCH net-next v3 4/6] net: ti: icssg-prueth: Make emac_run_xdp function independent of page Date: Tue, 14 Oct 2025 16:26:10 +0530 Message-ID: <20251014105613.2808674-5-m-malladi@ti.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251014105613.2808674-1-m-malladi@ti.com> References: <20251014105613.2808674-1-m-malladi@ti.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea Content-Type: text/plain; charset="utf-8" emac_run_xdp function runs xdp program, at a given hook point in the Rx path of the driver in NAPI context and returns XDP return codes. In zero copy mode the driver receives packets using UMEM frames instead of pages (native XDP). Decouple the usage of page in this function. Signed-off-by: Meghana Malladi --- drivers/net/ethernet/ti/icssg/icssg_common.c | 26 ++++++++++++-------- drivers/net/ethernet/ti/icssg/icssg_prueth.c | 3 ++- drivers/net/ethernet/ti/icssg/icssg_prueth.h | 9 +++++-- 3 files changed, 25 insertions(+), 13 deletions(-) diff --git a/drivers/net/ethernet/ti/icssg/icssg_common.c b/drivers/net/eth= ernet/ti/icssg/icssg_common.c index b526f246ecb9..bc6dc7bf3f6a 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_common.c +++ b/drivers/net/ethernet/ti/icssg/icssg_common.c @@ -647,15 +647,15 @@ void emac_rx_timestamp(struct prueth_emac *emac, * emac_xmit_xdp_frame - transmits an XDP frame * @emac: emac device * @xdpf: data to transmit - * @page: page from page pool if already DMA mapped * @q_idx: queue id + * @buff_type: Type of buffer to be transmitted * * Return: XDP state */ u32 emac_xmit_xdp_frame(struct prueth_emac *emac, struct xdp_frame *xdpf, - struct page *page, - unsigned int q_idx) + unsigned int q_idx, + enum prueth_tx_buff_type buff_type) { struct cppi5_host_desc_t *first_desc; struct net_device *ndev =3D emac->ndev; @@ -663,6 +663,7 @@ u32 emac_xmit_xdp_frame(struct prueth_emac *emac, struct prueth_tx_chn *tx_chn; dma_addr_t desc_dma, buf_dma; struct prueth_swdata *swdata; + struct page *page; u32 *epib; int ret; =20 @@ -679,7 +680,12 @@ u32 emac_xmit_xdp_frame(struct prueth_emac *emac, return ICSSG_XDP_CONSUMED; /* drop */ } =20 - if (page) { /* already DMA mapped by page_pool */ + if (buff_type =3D=3D PRUETH_TX_BUFF_TYPE_XDP_TX) { /* already DMA mapped = by page_pool */ + page =3D virt_to_head_page(xdpf->data); + if (unlikely(!page)) { + netdev_err(ndev, "xdp tx: failed to get page from xdpf\n"); + goto drop_free_descs; + } buf_dma =3D page_pool_get_dma_addr(page); buf_dma +=3D xdpf->headroom + sizeof(struct xdp_frame); } else { /* Map the linear buffer */ @@ -734,13 +740,11 @@ EXPORT_SYMBOL_GPL(emac_xmit_xdp_frame); * emac_run_xdp - run an XDP program * @emac: emac device * @xdp: XDP buffer containing the frame - * @page: page with RX data if already DMA mapped * @len: Rx descriptor packet length * * Return: XDP state */ -static u32 emac_run_xdp(struct prueth_emac *emac, struct xdp_buff *xdp, - struct page *page, u32 *len) +static u32 emac_run_xdp(struct prueth_emac *emac, struct xdp_buff *xdp, u3= 2 *len) { struct net_device *ndev =3D emac->ndev; struct netdev_queue *netif_txq; @@ -767,7 +771,8 @@ static u32 emac_run_xdp(struct prueth_emac *emac, struc= t xdp_buff *xdp, q_idx =3D cpu % emac->tx_ch_num; netif_txq =3D netdev_get_tx_queue(ndev, q_idx); __netif_tx_lock(netif_txq, cpu); - result =3D emac_xmit_xdp_frame(emac, xdpf, page, q_idx); + result =3D emac_xmit_xdp_frame(emac, xdpf, q_idx, + PRUETH_TX_BUFF_TYPE_XDP_TX); __netif_tx_unlock(netif_txq); if (result =3D=3D ICSSG_XDP_CONSUMED) { ndev->stats.tx_dropped++; @@ -792,7 +797,8 @@ static u32 emac_run_xdp(struct prueth_emac *emac, struc= t xdp_buff *xdp, fallthrough; /* handle aborts by dropping packet */ case XDP_DROP: ndev->stats.rx_dropped++; - page_pool_recycle_direct(emac->rx_chns.pg_pool, page); + page_pool_recycle_direct(emac->rx_chns.pg_pool, + virt_to_head_page(xdp->data)); return ICSSG_XDP_CONSUMED; } } @@ -861,7 +867,7 @@ static int emac_rx_packet(struct prueth_emac *emac, u32= flow_id, u32 *xdp_state) xdp_init_buff(&xdp, PAGE_SIZE, &rx_chn->xdp_rxq); xdp_prepare_buff(&xdp, pa, PRUETH_HEADROOM, pkt_len, false); =20 - *xdp_state =3D emac_run_xdp(emac, &xdp, page, &pkt_len); + *xdp_state =3D emac_run_xdp(emac, &xdp, &pkt_len); if (*xdp_state !=3D ICSSG_XDP_PASS) goto requeue; headroom =3D xdp.data - xdp.data_hard_start; diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/eth= ernet/ti/icssg/icssg_prueth.c index 78778f0e8f4a..296034ab6c67 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c @@ -1177,7 +1177,8 @@ static int emac_xdp_xmit(struct net_device *dev, int = n, struct xdp_frame **frame __netif_tx_lock(netif_txq, cpu); for (i =3D 0; i < n; i++) { xdpf =3D frames[i]; - err =3D emac_xmit_xdp_frame(emac, xdpf, NULL, q_idx); + err =3D emac_xmit_xdp_frame(emac, xdpf, q_idx, + PRUETH_TX_BUFF_TYPE_XDP_NDO); if (err !=3D ICSSG_XDP_TX) { ndev->stats.tx_dropped++; break; diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.h b/drivers/net/eth= ernet/ti/icssg/icssg_prueth.h index 90b3e9c9e148..74a0e5ed2a47 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.h +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.h @@ -154,6 +154,11 @@ enum prueth_swdata_type { PRUETH_SWDATA_XSK, }; =20 +enum prueth_tx_buff_type { + PRUETH_TX_BUFF_TYPE_XDP_TX, + PRUETH_TX_BUFF_TYPE_XDP_NDO, +}; + struct prueth_swdata { enum prueth_swdata_type type; union prueth_data { @@ -502,8 +507,8 @@ void prueth_put_cores(struct prueth *prueth, int slice); u64 icssg_ts_to_ns(u32 hi_sw, u32 hi, u32 lo, u32 cycle_time_ns); u32 emac_xmit_xdp_frame(struct prueth_emac *emac, struct xdp_frame *xdpf, - struct page *page, - unsigned int q_idx); + unsigned int q_idx, + enum prueth_tx_buff_type buff_type); void prueth_rx_cleanup(void *data, dma_addr_t desc_dma); void prueth_tx_cleanup(void *data, dma_addr_t desc_dma); int prueth_xsk_wakeup(struct net_device *ndev, u32 qid, u32 flags); --=20 2.43.0