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client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by DS2PEPF00003440.mail.protection.outlook.com (10.167.18.43) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7249.19 via Frontend Transport; Thu, 8 Feb 2024 00:57:54 +0000 Received: from driver-dev1.pensando.io (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.34; Wed, 7 Feb 2024 18:57:52 -0600 From: Shannon Nelson To: , , , , CC: , , Shannon Nelson Subject: [PATCH v2 net-next 07/10] ionic: Add XDP_TX support Date: Wed, 7 Feb 2024 16:57:22 -0800 Message-ID: <20240208005725.65134-8-shannon.nelson@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240208005725.65134-1-shannon.nelson@amd.com> References: <20240208005725.65134-1-shannon.nelson@amd.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS2PEPF00003440:EE_|SJ0PR12MB7475:EE_ X-MS-Office365-Filtering-Correlation-Id: 015d03bb-bf9d-48b1-f8de-08dc2840fb83 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Feb 2024 00:57:54.1734 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 015d03bb-bf9d-48b1-f8de-08dc2840fb83 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS2PEPF00003440.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB7475 X-Patchwork-Delegate: kuba@kernel.org The XDP_TX packets get fed back into the Rx queue's partnered Tx queue as an xdp_frame. Co-developed-by: Brett Creeley Signed-off-by: Brett Creeley Signed-off-by: Shannon Nelson --- .../net/ethernet/pensando/ionic/ionic_dev.h | 3 + .../net/ethernet/pensando/ionic/ionic_lif.c | 4 + .../net/ethernet/pensando/ionic/ionic_lif.h | 4 + .../net/ethernet/pensando/ionic/ionic_stats.c | 6 + .../net/ethernet/pensando/ionic/ionic_txrx.c | 138 +++++++++++++++++- 5 files changed, 152 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.h b/drivers/net/ethernet/pensando/ionic/ionic_dev.h index 70f5725fdfe8..76425bb546ba 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_dev.h +++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.h @@ -228,6 +228,8 @@ struct ionic_desc_info { struct ionic_buf_info bufs[MAX_SKB_FRAGS + 1]; ionic_desc_cb cb; void *cb_arg; + struct xdp_frame *xdpf; + enum xdp_action act; }; #define IONIC_QUEUE_NAME_MAX_SZ 16 @@ -263,6 +265,7 @@ struct ionic_queue { struct ionic_rxq_sg_desc *rxq_sgl; }; struct xdp_rxq_info *xdp_rxq_info; + struct ionic_queue *partner; dma_addr_t base_pa; dma_addr_t cmb_base_pa; dma_addr_t sg_base_pa; diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c index 6e9065dd149e..997141321c40 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c @@ -878,6 +878,9 @@ static int ionic_lif_rxq_init(struct ionic_lif *lif, struct ionic_qcq *qcq) }; int err; + q->partner = &lif->txqcqs[q->index]->q; + q->partner->partner = q; + if (!lif->xdp_prog) ctx.cmd.q_init.flags |= cpu_to_le16(IONIC_QINIT_F_SG); @@ -2923,6 +2926,7 @@ static void ionic_swap_queues(struct ionic_qcq *a, struct ionic_qcq *b) swap(a->q.base_pa, b->q.base_pa); swap(a->q.info, b->q.info); swap(a->q.xdp_rxq_info, b->q.xdp_rxq_info); + swap(a->q.partner, b->q.partner); swap(a->q_base, b->q_base); swap(a->q_base_pa, b->q_base_pa); swap(a->q_size, b->q_size); diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h index 61fa4ea4f04c..092ff08fc7e0 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h @@ -37,6 +37,7 @@ struct ionic_tx_stats { u64 dma_map_err; u64 hwstamp_valid; u64 hwstamp_invalid; + u64 xdp_frames; }; struct ionic_rx_stats { @@ -54,6 +55,7 @@ struct ionic_rx_stats { u64 xdp_drop; u64 xdp_aborted; u64 xdp_pass; + u64 xdp_tx; }; #define IONIC_QCQ_F_INITED BIT(0) @@ -141,6 +143,8 @@ struct ionic_lif_sw_stats { u64 xdp_drop; u64 xdp_aborted; u64 xdp_pass; + u64 xdp_tx; + u64 xdp_frames; }; enum ionic_lif_state_flags { diff --git a/drivers/net/ethernet/pensando/ionic/ionic_stats.c b/drivers/net/ethernet/pensando/ionic/ionic_stats.c index 2fb20173b2c6..5d48226e66cd 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_stats.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_stats.c @@ -30,6 +30,8 @@ static const struct ionic_stat_desc ionic_lif_stats_desc[] = { IONIC_LIF_STAT_DESC(xdp_drop), IONIC_LIF_STAT_DESC(xdp_aborted), IONIC_LIF_STAT_DESC(xdp_pass), + IONIC_LIF_STAT_DESC(xdp_tx), + IONIC_LIF_STAT_DESC(xdp_frames), }; static const struct ionic_stat_desc ionic_port_stats_desc[] = { @@ -138,6 +140,7 @@ static const struct ionic_stat_desc ionic_tx_stats_desc[] = { IONIC_TX_STAT_DESC(csum_none), IONIC_TX_STAT_DESC(csum), IONIC_TX_STAT_DESC(vlan_inserted), + IONIC_TX_STAT_DESC(xdp_frames), }; static const struct ionic_stat_desc ionic_rx_stats_desc[] = { @@ -155,6 +158,7 @@ static const struct ionic_stat_desc ionic_rx_stats_desc[] = { IONIC_RX_STAT_DESC(xdp_drop), IONIC_RX_STAT_DESC(xdp_aborted), IONIC_RX_STAT_DESC(xdp_pass), + IONIC_RX_STAT_DESC(xdp_tx), }; #define IONIC_NUM_LIF_STATS ARRAY_SIZE(ionic_lif_stats_desc) @@ -177,6 +181,7 @@ static void ionic_add_lif_txq_stats(struct ionic_lif *lif, int q_num, stats->tx_csum += txstats->csum; stats->tx_hwstamp_valid += txstats->hwstamp_valid; stats->tx_hwstamp_invalid += txstats->hwstamp_invalid; + stats->xdp_frames += txstats->xdp_frames; } static void ionic_add_lif_rxq_stats(struct ionic_lif *lif, int q_num, @@ -194,6 +199,7 @@ static void ionic_add_lif_rxq_stats(struct ionic_lif *lif, int q_num, stats->xdp_drop += rxstats->xdp_drop; stats->xdp_aborted += rxstats->xdp_aborted; stats->xdp_pass += rxstats->xdp_pass; + stats->xdp_tx += rxstats->xdp_tx; } static void ionic_get_lif_stats(struct ionic_lif *lif, diff --git a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c index 3416e8442084..71405f44879f 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c @@ -10,6 +10,16 @@ #include "ionic_lif.h" #include "ionic_txrx.h" +static int ionic_maybe_stop_tx(struct ionic_queue *q, int ndescs); + +static dma_addr_t ionic_tx_map_single(struct ionic_queue *q, + void *data, size_t len); + +static void ionic_tx_clean(struct ionic_queue *q, + struct ionic_desc_info *desc_info, + struct ionic_cq_info *cq_info, + void *cb_arg); + static inline void ionic_txq_post(struct ionic_queue *q, bool ring_dbell, ionic_desc_cb cb_func, void *cb_arg) { @@ -293,6 +303,75 @@ static struct sk_buff *ionic_rx_copybreak(struct ionic_queue *q, return skb; } +static void ionic_xdp_tx_desc_clean(struct ionic_queue *q, + struct ionic_desc_info *desc_info) +{ + unsigned int nbufs = desc_info->nbufs; + struct ionic_buf_info *buf_info; + struct device *dev = q->dev; + + if (!nbufs) + return; + + buf_info = desc_info->bufs; + dma_unmap_single(dev, buf_info->dma_addr, + buf_info->len, DMA_TO_DEVICE); + __free_pages(buf_info->page, 0); + buf_info->page = NULL; + + desc_info->nbufs = 0; + desc_info->xdpf = NULL; + desc_info->act = 0; +} + +static int ionic_xdp_post_frame(struct net_device *netdev, + struct ionic_queue *q, struct xdp_frame *frame, + enum xdp_action act, struct page *page, int off, + bool ring_doorbell) +{ + struct ionic_desc_info *desc_info; + struct ionic_buf_info *buf_info; + struct ionic_tx_stats *stats; + struct ionic_txq_desc *desc; + size_t len = frame->len; + dma_addr_t dma_addr; + u64 cmd; + + desc_info = &q->info[q->head_idx]; + desc = desc_info->txq_desc; + buf_info = desc_info->bufs; + stats = q_to_tx_stats(q); + + dma_addr = ionic_tx_map_single(q, frame->data, len); + if (dma_mapping_error(q->dev, dma_addr)) { + stats->dma_map_err++; + return -EIO; + } + buf_info->dma_addr = dma_addr; + buf_info->len = len; + buf_info->page = page; + buf_info->page_offset = off; + + desc_info->nbufs = 1; + desc_info->xdpf = frame; + desc_info->act = act; + + cmd = encode_txq_desc_cmd(IONIC_TXQ_DESC_OPCODE_CSUM_NONE, + 0, 0, buf_info->dma_addr); + desc->cmd = cpu_to_le64(cmd); + desc->len = cpu_to_le16(len); + desc->csum_start = 0; + desc->csum_offset = 0; + + stats->xdp_frames++; + stats->pkts++; + stats->bytes += len; + + ionic_txq_post(q, ring_doorbell, ionic_tx_clean, NULL); + + return 0; +} + static bool ionic_run_xdp(struct ionic_rx_stats *stats, struct net_device *netdev, struct ionic_queue *rxq, @@ -302,6 +381,10 @@ static bool ionic_run_xdp(struct ionic_rx_stats *stats, u32 xdp_action = XDP_ABORTED; struct bpf_prog *xdp_prog; struct xdp_buff xdp_buf; + struct ionic_queue *txq; + struct netdev_queue *nq; + struct xdp_frame *xdpf; + int err = 0; xdp_prog = READ_ONCE(rxq->lif->xdp_prog); if (!xdp_prog) @@ -330,14 +413,53 @@ static bool ionic_run_xdp(struct ionic_rx_stats *stats, break; case XDP_REDIRECT: + goto out_xdp_abort; + case XDP_TX: + xdpf = xdp_convert_buff_to_frame(&xdp_buf); + if (!xdpf) + goto out_xdp_abort; + + txq = rxq->partner; + nq = netdev_get_tx_queue(netdev, txq->index); + __netif_tx_lock(nq, smp_processor_id()); + txq_trans_cond_update(nq); + + if (netif_tx_queue_stopped(nq) || + unlikely(ionic_maybe_stop_tx(txq, 1))) { + __netif_tx_unlock(nq); + goto out_xdp_abort; + } + + dma_unmap_page(rxq->dev, buf_info->dma_addr, + IONIC_PAGE_SIZE, DMA_FROM_DEVICE); + + err = ionic_xdp_post_frame(netdev, txq, xdpf, XDP_TX, + buf_info->page, + buf_info->page_offset, + true); + __netif_tx_unlock(nq); + if (err) { + netdev_dbg(netdev, "tx ionic_xdp_post_frame err %d\n", err); + goto out_xdp_abort; + } + stats->xdp_tx++; + + /* the Tx completion will free the buffers */ + break; + case XDP_ABORTED: default: - trace_xdp_exception(netdev, xdp_prog, xdp_action); - ionic_rx_page_free(rxq, buf_info); - stats->xdp_aborted++; + goto out_xdp_abort; } + return true; + +out_xdp_abort: + trace_xdp_exception(netdev, xdp_prog, xdp_action); + ionic_rx_page_free(rxq, buf_info); + stats->xdp_aborted++; + return true; } @@ -889,6 +1011,16 @@ static void ionic_tx_clean(struct ionic_queue *q, struct sk_buff *skb = cb_arg; u16 qi; + if (desc_info->xdpf) { + ionic_xdp_tx_desc_clean(q->partner, desc_info); + stats->clean++; + + if (unlikely(__netif_subqueue_stopped(q->lif->netdev, q->index))) + netif_wake_subqueue(q->lif->netdev, q->index); + + return; + } + ionic_tx_desc_unmap_bufs(q, desc_info); if (!skb)