diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile index 366740ab9c5a..f2e478b884b0 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Makefile +++ b/drivers/net/ethernet/stmicro/stmmac/Makefile @@ -6,6 +6,7 @@ stmmac-objs:= stmmac_main.o stmmac_ethtool.o stmmac_mdio.o ring_mode.o \ mmc_core.o stmmac_hwtstamp.o stmmac_ptp.o dwmac4_descs.o \ dwmac4_dma.o dwmac4_lib.o dwmac4_core.o dwmac5.o hwif.o \ stmmac_tc.o dwxgmac2_core.o dwxgmac2_dma.o dwxgmac2_descs.o \ + stmmac_xdp.o \ $(stmmac-y) stmmac-$(CONFIG_STMMAC_SELFTESTS) += stmmac_selftests.o diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index 9966f6f10905..c49debb62b05 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -36,12 +36,19 @@ struct stmmac_resources { int tx_irq[MTL_MAX_TX_QUEUES]; }; +enum stmmac_txbuf_type { + STMMAC_TXBUF_T_SKB, + STMMAC_TXBUF_T_XDP_TX, + STMMAC_TXBUF_T_XDP_NDO, +}; + struct stmmac_tx_info { dma_addr_t buf; bool map_as_page; unsigned len; bool last_segment; bool is_jumbo; + enum stmmac_txbuf_type buf_type; }; #define STMMAC_TBS_AVAIL BIT(0) @@ -57,7 +64,10 @@ struct stmmac_tx_queue { struct dma_extended_desc *dma_etx ____cacheline_aligned_in_smp; struct dma_edesc *dma_entx; struct dma_desc *dma_tx; - struct sk_buff **tx_skbuff; + union { + struct sk_buff **tx_skbuff; + struct xdp_frame **xdpf; + }; struct stmmac_tx_info *tx_skbuff_dma; unsigned int cur_tx; unsigned int dirty_tx; @@ -68,14 +78,16 @@ struct stmmac_tx_queue { struct stmmac_rx_buffer { struct page *page; - struct page *sec_page; dma_addr_t addr; + __u32 page_offset; + struct page *sec_page; dma_addr_t sec_addr; }; struct stmmac_rx_queue { u32 rx_count_frames; u32 queue_index; + struct xdp_rxq_info xdp_rxq; struct page_pool *page_pool; struct stmmac_rx_buffer *buf_pool; struct stmmac_priv *priv_data; @@ -160,6 +172,7 @@ struct stmmac_priv { bool tx_path_in_lpi_mode; bool tso; int sph; + int sph_cap; u32 sarc_type; unsigned int dma_buf_sz; @@ -268,6 +281,9 @@ struct stmmac_priv { /* Receive Side Scaling */ struct stmmac_rss rss; + + /* XDP BPF Program */ + struct bpf_prog *xdp_prog; }; enum stmmac_state { @@ -284,6 +300,8 @@ void stmmac_set_ethtool_ops(struct net_device *netdev); void stmmac_ptp_register(struct stmmac_priv *priv); void stmmac_ptp_unregister(struct stmmac_priv *priv); +int stmmac_open(struct net_device *dev); +int stmmac_release(struct net_device *dev); int stmmac_resume(struct device *dev); int stmmac_suspend(struct device *dev); int stmmac_dvr_remove(struct device *dev); @@ -297,6 +315,19 @@ int stmmac_reinit_ringparam(struct net_device *dev, u32 rx_size, u32 tx_size); int stmmac_bus_clks_config(struct stmmac_priv *priv, bool enabled); void stmmac_fpe_handshake(struct stmmac_priv *priv, bool enable); +static inline bool stmmac_xdp_is_enabled(struct stmmac_priv *priv) +{ + return !!priv->xdp_prog; +} + +static inline unsigned int stmmac_rx_offset(struct stmmac_priv *priv) +{ + if (stmmac_xdp_is_enabled(priv)) + return XDP_PACKET_HEADROOM; + + return 0; +} + #if IS_ENABLED(CONFIG_STMMAC_SELFTESTS) void stmmac_selftest_run(struct net_device *dev, struct ethtool_test *etest, u64 *buf); diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index d34388b1ffcc..77285646c5fc 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -38,9 +38,11 @@ #include #include #include +#include #include #include "stmmac_ptp.h" #include "stmmac.h" +#include "stmmac_xdp.h" #include #include #include "dwmac1000.h" @@ -67,6 +69,11 @@ MODULE_PARM_DESC(phyaddr, "Physical device address"); #define STMMAC_TX_THRESH(x) ((x)->dma_tx_size / 4) #define STMMAC_RX_THRESH(x) ((x)->dma_rx_size / 4) +#define STMMAC_XDP_PASS 0 +#define STMMAC_XDP_CONSUMED BIT(0) +#define STMMAC_XDP_TX BIT(1) +#define STMMAC_XDP_REDIRECT BIT(2) + static int flow_ctrl = FLOW_AUTO; module_param(flow_ctrl, int, 0644); MODULE_PARM_DESC(flow_ctrl, "Flow control ability [on/off]"); @@ -1384,6 +1391,7 @@ static int stmmac_init_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p, buf->page = page_pool_dev_alloc_pages(rx_q->page_pool); if (!buf->page) return -ENOMEM; + buf->page_offset = stmmac_rx_offset(priv); if (priv->sph) { buf->sec_page = page_pool_dev_alloc_pages(rx_q->page_pool); @@ -1397,7 +1405,8 @@ static int stmmac_init_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p, stmmac_set_desc_sec_addr(priv, p, buf->sec_addr, false); } - buf->addr = page_pool_get_dma_addr(buf->page); + buf->addr = page_pool_get_dma_addr(buf->page) + buf->page_offset; + stmmac_set_desc_addr(priv, p, buf->addr); if (priv->dma_buf_sz == BUF_SIZE_16KiB) stmmac_init_desc3(priv, p); @@ -1435,7 +1444,8 @@ static void stmmac_free_tx_buffer(struct stmmac_priv *priv, u32 queue, int i) { struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; - if (tx_q->tx_skbuff_dma[i].buf) { + if (tx_q->tx_skbuff_dma[i].buf && + tx_q->tx_skbuff_dma[i].buf_type != STMMAC_TXBUF_T_XDP_TX) { if (tx_q->tx_skbuff_dma[i].map_as_page) dma_unmap_page(priv->device, tx_q->tx_skbuff_dma[i].buf, @@ -1448,12 +1458,21 @@ static void stmmac_free_tx_buffer(struct stmmac_priv *priv, u32 queue, int i) DMA_TO_DEVICE); } - if (tx_q->tx_skbuff[i]) { + if (tx_q->xdpf[i] && + (tx_q->tx_skbuff_dma[i].buf_type == STMMAC_TXBUF_T_XDP_TX || + tx_q->tx_skbuff_dma[i].buf_type == STMMAC_TXBUF_T_XDP_NDO)) { + xdp_return_frame(tx_q->xdpf[i]); + tx_q->xdpf[i] = NULL; + } + + if (tx_q->tx_skbuff[i] && + tx_q->tx_skbuff_dma[i].buf_type == STMMAC_TXBUF_T_SKB) { dev_kfree_skb_any(tx_q->tx_skbuff[i]); tx_q->tx_skbuff[i] = NULL; - tx_q->tx_skbuff_dma[i].buf = 0; - tx_q->tx_skbuff_dma[i].map_as_page = false; } + + tx_q->tx_skbuff_dma[i].buf = 0; + tx_q->tx_skbuff_dma[i].map_as_page = false; } /** @@ -1503,7 +1522,8 @@ static void stmmac_reinit_rx_buffers(struct stmmac_priv *priv) if (!buf->page) goto err_reinit_rx_buffers; - buf->addr = page_pool_get_dma_addr(buf->page); + buf->addr = page_pool_get_dma_addr(buf->page) + + buf->page_offset; } if (priv->sph && !buf->sec_page) { @@ -1560,6 +1580,7 @@ static int init_dma_rx_desc_rings(struct net_device *dev, gfp_t flags) for (queue = 0; queue < rx_count; queue++) { struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; + int ret; netif_dbg(priv, probe, priv->dev, "(%s) dma_rx_phy=0x%08x\n", __func__, @@ -1567,6 +1588,14 @@ static int init_dma_rx_desc_rings(struct net_device *dev, gfp_t flags) stmmac_clear_rx_descriptors(priv, queue); + WARN_ON(xdp_rxq_info_reg_mem_model(&rx_q->xdp_rxq, + MEM_TYPE_PAGE_POOL, + rx_q->page_pool)); + + netdev_info(priv->dev, + "Register MEM_TYPE_PAGE_POOL RxQ-%d\n", + rx_q->queue_index); + for (i = 0; i < priv->dma_rx_size; i++) { struct dma_desc *p; @@ -1767,6 +1796,9 @@ static void free_dma_rx_desc_resources(struct stmmac_priv *priv) sizeof(struct dma_extended_desc), rx_q->dma_erx, rx_q->dma_rx_phy); + if (xdp_rxq_info_is_reg(&rx_q->xdp_rxq)) + xdp_rxq_info_unreg(&rx_q->xdp_rxq); + kfree(rx_q->buf_pool); if (rx_q->page_pool) page_pool_destroy(rx_q->page_pool); @@ -1821,6 +1853,7 @@ static void free_dma_tx_desc_resources(struct stmmac_priv *priv) */ static int alloc_dma_rx_desc_resources(struct stmmac_priv *priv) { + bool xdp_prog = stmmac_xdp_is_enabled(priv); u32 rx_count = priv->plat->rx_queues_to_use; int ret = -ENOMEM; u32 queue; @@ -1828,19 +1861,23 @@ static int alloc_dma_rx_desc_resources(struct stmmac_priv *priv) /* RX queues buffers and DMA */ for (queue = 0; queue < rx_count; queue++) { struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; + struct stmmac_channel *ch = &priv->channel[queue]; struct page_pool_params pp_params = { 0 }; unsigned int num_pages; + int ret; rx_q->queue_index = queue; rx_q->priv_data = priv; - pp_params.flags = PP_FLAG_DMA_MAP; + pp_params.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV; pp_params.pool_size = priv->dma_rx_size; num_pages = DIV_ROUND_UP(priv->dma_buf_sz, PAGE_SIZE); pp_params.order = ilog2(num_pages); pp_params.nid = dev_to_node(priv->device); pp_params.dev = priv->device; - pp_params.dma_dir = DMA_FROM_DEVICE; + pp_params.dma_dir = xdp_prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE; + pp_params.offset = stmmac_rx_offset(priv); + pp_params.max_len = STMMAC_MAX_RX_BUF_SIZE(num_pages); rx_q->page_pool = page_pool_create(&pp_params); if (IS_ERR(rx_q->page_pool)) { @@ -1873,6 +1910,14 @@ static int alloc_dma_rx_desc_resources(struct stmmac_priv *priv) if (!rx_q->dma_rx) goto err_dma; } + + ret = xdp_rxq_info_reg(&rx_q->xdp_rxq, priv->dev, + rx_q->queue_index, + ch->rx_napi.napi_id); + if (ret) { + netdev_err(priv->dev, "Failed to register xdp rxq info\n"); + goto err_dma; + } } return 0; @@ -1974,11 +2019,13 @@ static int alloc_dma_desc_resources(struct stmmac_priv *priv) */ static void free_dma_desc_resources(struct stmmac_priv *priv) { - /* Release the DMA RX socket buffers */ - free_dma_rx_desc_resources(priv); - /* Release the DMA TX socket buffers */ free_dma_tx_desc_resources(priv); + + /* Release the DMA RX socket buffers later + * to ensure all pending XDP_TX buffers are returned. + */ + free_dma_rx_desc_resources(priv); } /** @@ -2170,10 +2217,23 @@ static int stmmac_tx_clean(struct stmmac_priv *priv, int budget, u32 queue) entry = tx_q->dirty_tx; while ((entry != tx_q->cur_tx) && (count < budget)) { - struct sk_buff *skb = tx_q->tx_skbuff[entry]; + struct xdp_frame *xdpf; + struct sk_buff *skb; struct dma_desc *p; int status; + if (tx_q->tx_skbuff_dma[entry].buf_type == STMMAC_TXBUF_T_XDP_TX || + tx_q->tx_skbuff_dma[entry].buf_type == STMMAC_TXBUF_T_XDP_NDO) { + xdpf = tx_q->xdpf[entry]; + skb = NULL; + } else if (tx_q->tx_skbuff_dma[entry].buf_type == STMMAC_TXBUF_T_SKB) { + xdpf = NULL; + skb = tx_q->tx_skbuff[entry]; + } else { + xdpf = NULL; + skb = NULL; + } + if (priv->extend_desc) p = (struct dma_desc *)(tx_q->dma_etx + entry); else if (tx_q->tbs & STMMAC_TBS_AVAIL) @@ -2203,10 +2263,12 @@ static int stmmac_tx_clean(struct stmmac_priv *priv, int budget, u32 queue) priv->dev->stats.tx_packets++; priv->xstats.tx_pkt_n++; } - stmmac_get_tx_hwtstamp(priv, p, skb); + if (skb) + stmmac_get_tx_hwtstamp(priv, p, skb); } - if (likely(tx_q->tx_skbuff_dma[entry].buf)) { + if (likely(tx_q->tx_skbuff_dma[entry].buf && + tx_q->tx_skbuff_dma[entry].buf_type != STMMAC_TXBUF_T_XDP_TX)) { if (tx_q->tx_skbuff_dma[entry].map_as_page) dma_unmap_page(priv->device, tx_q->tx_skbuff_dma[entry].buf, @@ -2227,11 +2289,25 @@ static int stmmac_tx_clean(struct stmmac_priv *priv, int budget, u32 queue) tx_q->tx_skbuff_dma[entry].last_segment = false; tx_q->tx_skbuff_dma[entry].is_jumbo = false; - if (likely(skb != NULL)) { - pkts_compl++; - bytes_compl += skb->len; - dev_consume_skb_any(skb); - tx_q->tx_skbuff[entry] = NULL; + if (xdpf && + tx_q->tx_skbuff_dma[entry].buf_type == STMMAC_TXBUF_T_XDP_TX) { + xdp_return_frame_rx_napi(xdpf); + tx_q->xdpf[entry] = NULL; + } + + if (xdpf && + tx_q->tx_skbuff_dma[entry].buf_type == STMMAC_TXBUF_T_XDP_NDO) { + xdp_return_frame(xdpf); + tx_q->xdpf[entry] = NULL; + } + + if (tx_q->tx_skbuff_dma[entry].buf_type == STMMAC_TXBUF_T_SKB) { + if (likely(skb)) { + pkts_compl++; + bytes_compl += skb->len; + dev_consume_skb_any(skb); + tx_q->tx_skbuff[entry] = NULL; + } } stmmac_release_tx_desc(priv, p, priv->mode); @@ -2858,6 +2934,7 @@ static int stmmac_hw_setup(struct net_device *dev, bool init_ptp) struct stmmac_priv *priv = netdev_priv(dev); u32 rx_cnt = priv->plat->rx_queues_to_use; u32 tx_cnt = priv->plat->tx_queues_to_use; + bool sph_en; u32 chan; int ret; @@ -2952,10 +3029,10 @@ static int stmmac_hw_setup(struct net_device *dev, bool init_ptp) } /* Enable Split Header */ - if (priv->sph && priv->hw->rx_csum) { - for (chan = 0; chan < rx_cnt; chan++) - stmmac_enable_sph(priv, priv->ioaddr, 1, chan); - } + sph_en = (priv->hw->rx_csum > 0) && priv->sph; + for (chan = 0; chan < rx_cnt; chan++) + stmmac_enable_sph(priv, priv->ioaddr, sph_en, chan); + /* VLAN Tag Insertion */ if (priv->dma_cap.vlins) @@ -3005,15 +3082,19 @@ static void stmmac_free_irq(struct net_device *dev, fallthrough; case REQ_IRQ_ERR_TX: for (j = irq_idx - 1; j >= 0; j--) { - if (priv->tx_irq[j] > 0) + if (priv->tx_irq[j] > 0) { + irq_set_affinity_hint(priv->tx_irq[j], NULL); free_irq(priv->tx_irq[j], &priv->tx_queue[j]); + } } irq_idx = priv->plat->rx_queues_to_use; fallthrough; case REQ_IRQ_ERR_RX: for (j = irq_idx - 1; j >= 0; j--) { - if (priv->rx_irq[j] > 0) + if (priv->rx_irq[j] > 0) { + irq_set_affinity_hint(priv->rx_irq[j], NULL); free_irq(priv->rx_irq[j], &priv->rx_queue[j]); + } } if (priv->sfty_ue_irq > 0 && priv->sfty_ue_irq != dev->irq) @@ -3045,6 +3126,7 @@ static int stmmac_request_irq_multi_msi(struct net_device *dev) { enum request_irq_err irq_err = REQ_IRQ_ERR_NO; struct stmmac_priv *priv = netdev_priv(dev); + cpumask_t cpu_mask; int irq_idx = 0; char *int_name; int ret; @@ -3153,6 +3235,9 @@ static int stmmac_request_irq_multi_msi(struct net_device *dev) irq_idx = i; goto irq_error; } + cpumask_clear(&cpu_mask); + cpumask_set_cpu(i % num_online_cpus(), &cpu_mask); + irq_set_affinity_hint(priv->rx_irq[i], &cpu_mask); } /* Request Tx MSI irq */ @@ -3173,6 +3258,9 @@ static int stmmac_request_irq_multi_msi(struct net_device *dev) irq_idx = i; goto irq_error; } + cpumask_clear(&cpu_mask); + cpumask_set_cpu(i % num_online_cpus(), &cpu_mask); + irq_set_affinity_hint(priv->tx_irq[i], &cpu_mask); } return 0; @@ -3256,7 +3344,7 @@ static int stmmac_request_irq(struct net_device *dev) * 0 on success and an appropriate (-)ve integer as defined in errno.h * file on failure. */ -static int stmmac_open(struct net_device *dev) +int stmmac_open(struct net_device *dev) { struct stmmac_priv *priv = netdev_priv(dev); int bfsize = 0; @@ -3379,7 +3467,7 @@ static void stmmac_fpe_stop_wq(struct stmmac_priv *priv) * Description: * This is the stop entry point of the driver. */ -static int stmmac_release(struct net_device *dev) +int stmmac_release(struct net_device *dev) { struct stmmac_priv *priv = netdev_priv(dev); u32 chan; @@ -3506,6 +3594,28 @@ static void stmmac_tso_allocator(struct stmmac_priv *priv, dma_addr_t des, } } +static void stmmac_flush_tx_descriptors(struct stmmac_priv *priv, int queue) +{ + struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; + int desc_size; + + if (likely(priv->extend_desc)) + desc_size = sizeof(struct dma_extended_desc); + else if (tx_q->tbs & STMMAC_TBS_AVAIL) + desc_size = sizeof(struct dma_edesc); + else + desc_size = sizeof(struct dma_desc); + + /* The own bit must be the latest setting done when prepare the + * descriptor and then barrier is needed to make sure that + * all is coherent before granting the DMA engine. + */ + wmb(); + + tx_q->tx_tail_addr = tx_q->dma_tx_phy + (tx_q->cur_tx * desc_size); + stmmac_set_tx_tail_ptr(priv, priv->ioaddr, tx_q->tx_tail_addr, queue); +} + /** * stmmac_tso_xmit - Tx entry point of the driver for oversized frames (TSO) * @skb : the socket buffer @@ -3537,10 +3647,10 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev) { struct dma_desc *desc, *first, *mss_desc = NULL; struct stmmac_priv *priv = netdev_priv(dev); - int desc_size, tmp_pay_len = 0, first_tx; int nfrags = skb_shinfo(skb)->nr_frags; u32 queue = skb_get_queue_mapping(skb); unsigned int first_entry, tx_packets; + int tmp_pay_len = 0, first_tx; struct stmmac_tx_queue *tx_q; bool has_vlan, set_ic; u8 proto_hdr_len, hdr; @@ -3622,6 +3732,8 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev) tx_q->tx_skbuff_dma[first_entry].buf = des; tx_q->tx_skbuff_dma[first_entry].len = skb_headlen(skb); + tx_q->tx_skbuff_dma[first_entry].map_as_page = false; + tx_q->tx_skbuff_dma[first_entry].buf_type = STMMAC_TXBUF_T_SKB; if (priv->dma_cap.addr64 <= 32) { first->des0 = cpu_to_le32(des); @@ -3657,12 +3769,14 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev) tx_q->tx_skbuff_dma[tx_q->cur_tx].buf = des; tx_q->tx_skbuff_dma[tx_q->cur_tx].len = skb_frag_size(frag); tx_q->tx_skbuff_dma[tx_q->cur_tx].map_as_page = true; + tx_q->tx_skbuff_dma[tx_q->cur_tx].buf_type = STMMAC_TXBUF_T_SKB; } tx_q->tx_skbuff_dma[tx_q->cur_tx].last_segment = true; /* Only the last descriptor gets to point to the skb. */ tx_q->tx_skbuff[tx_q->cur_tx] = skb; + tx_q->tx_skbuff_dma[tx_q->cur_tx].buf_type = STMMAC_TXBUF_T_SKB; /* Manage tx mitigation */ tx_packets = (tx_q->cur_tx + 1) - first_tx; @@ -3738,12 +3852,6 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev) stmmac_set_tx_owner(priv, mss_desc); } - /* The own bit must be the latest setting done when prepare the - * descriptor and then barrier is needed to make sure that - * all is coherent before granting the DMA engine. - */ - wmb(); - if (netif_msg_pktdata(priv)) { pr_info("%s: curr=%d dirty=%d f=%d, e=%d, f_p=%p, nfrags %d\n", __func__, tx_q->cur_tx, tx_q->dirty_tx, first_entry, @@ -3754,13 +3862,7 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev) netdev_tx_sent_queue(netdev_get_tx_queue(dev, queue), skb->len); - if (tx_q->tbs & STMMAC_TBS_AVAIL) - desc_size = sizeof(struct dma_edesc); - else - desc_size = sizeof(struct dma_desc); - - tx_q->tx_tail_addr = tx_q->dma_tx_phy + (tx_q->cur_tx * desc_size); - stmmac_set_tx_tail_ptr(priv, priv->ioaddr, tx_q->tx_tail_addr, queue); + stmmac_flush_tx_descriptors(priv, queue); stmmac_tx_timer_arm(priv, queue); return NETDEV_TX_OK; @@ -3790,10 +3892,10 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev) int nfrags = skb_shinfo(skb)->nr_frags; int gso = skb_shinfo(skb)->gso_type; struct dma_edesc *tbs_desc = NULL; - int entry, desc_size, first_tx; struct dma_desc *desc, *first; struct stmmac_tx_queue *tx_q; bool has_vlan, set_ic; + int entry, first_tx; dma_addr_t des; tx_q = &priv->tx_queue[queue]; @@ -3881,6 +3983,7 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev) tx_q->tx_skbuff_dma[entry].map_as_page = true; tx_q->tx_skbuff_dma[entry].len = len; tx_q->tx_skbuff_dma[entry].last_segment = last_segment; + tx_q->tx_skbuff_dma[entry].buf_type = STMMAC_TXBUF_T_SKB; /* Prepare the descriptor and set the own bit too */ stmmac_prepare_tx_desc(priv, desc, 0, len, csum_insertion, @@ -3889,6 +3992,7 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev) /* Only the last descriptor gets to point to the skb. */ tx_q->tx_skbuff[entry] = skb; + tx_q->tx_skbuff_dma[entry].buf_type = STMMAC_TXBUF_T_SKB; /* According to the coalesce parameter the IC bit for the latest * segment is reset and the timer re-started to clean the tx status. @@ -3967,6 +4071,8 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev) goto dma_map_err; tx_q->tx_skbuff_dma[first_entry].buf = des; + tx_q->tx_skbuff_dma[first_entry].buf_type = STMMAC_TXBUF_T_SKB; + tx_q->tx_skbuff_dma[first_entry].map_as_page = false; stmmac_set_desc_addr(priv, first, des); @@ -3995,25 +4101,11 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev) stmmac_set_tx_owner(priv, first); - /* The own bit must be the latest setting done when prepare the - * descriptor and then barrier is needed to make sure that - * all is coherent before granting the DMA engine. - */ - wmb(); - netdev_tx_sent_queue(netdev_get_tx_queue(dev, queue), skb->len); stmmac_enable_dma_transmission(priv, priv->ioaddr); - if (likely(priv->extend_desc)) - desc_size = sizeof(struct dma_extended_desc); - else if (tx_q->tbs & STMMAC_TBS_AVAIL) - desc_size = sizeof(struct dma_edesc); - else - desc_size = sizeof(struct dma_desc); - - tx_q->tx_tail_addr = tx_q->dma_tx_phy + (tx_q->cur_tx * desc_size); - stmmac_set_tx_tail_ptr(priv, priv->ioaddr, tx_q->tx_tail_addr, queue); + stmmac_flush_tx_descriptors(priv, queue); stmmac_tx_timer_arm(priv, queue); return NETDEV_TX_OK; @@ -4056,11 +4148,9 @@ static void stmmac_rx_vlan(struct net_device *dev, struct sk_buff *skb) static inline void stmmac_rx_refill(struct stmmac_priv *priv, u32 queue) { struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; - int len, dirty = stmmac_rx_dirty(priv, queue); + int dirty = stmmac_rx_dirty(priv, queue); unsigned int entry = rx_q->dirty_rx; - len = DIV_ROUND_UP(priv->dma_buf_sz, PAGE_SIZE) * PAGE_SIZE; - while (dirty-- > 0) { struct stmmac_rx_buffer *buf = &rx_q->buf_pool[entry]; struct dma_desc *p; @@ -4083,18 +4173,9 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv, u32 queue) break; buf->sec_addr = page_pool_get_dma_addr(buf->sec_page); - - dma_sync_single_for_device(priv->device, buf->sec_addr, - len, DMA_FROM_DEVICE); } - buf->addr = page_pool_get_dma_addr(buf->page); - - /* Sync whole allocation to device. This will invalidate old - * data. - */ - dma_sync_single_for_device(priv->device, buf->addr, len, - DMA_FROM_DEVICE); + buf->addr = page_pool_get_dma_addr(buf->page) + buf->page_offset; stmmac_set_desc_addr(priv, p, buf->addr); if (priv->sph) @@ -4173,6 +4254,180 @@ static unsigned int stmmac_rx_buf2_len(struct stmmac_priv *priv, return plen - len; } +static int stmmac_xdp_xmit_xdpf(struct stmmac_priv *priv, int queue, + struct xdp_frame *xdpf, bool dma_map) +{ + struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; + unsigned int entry = tx_q->cur_tx; + struct dma_desc *tx_desc; + dma_addr_t dma_addr; + bool set_ic; + + if (stmmac_tx_avail(priv, queue) < STMMAC_TX_THRESH(priv)) + return STMMAC_XDP_CONSUMED; + + if (likely(priv->extend_desc)) + tx_desc = (struct dma_desc *)(tx_q->dma_etx + entry); + else if (tx_q->tbs & STMMAC_TBS_AVAIL) + tx_desc = &tx_q->dma_entx[entry].basic; + else + tx_desc = tx_q->dma_tx + entry; + + if (dma_map) { + dma_addr = dma_map_single(priv->device, xdpf->data, + xdpf->len, DMA_TO_DEVICE); + if (dma_mapping_error(priv->device, dma_addr)) + return STMMAC_XDP_CONSUMED; + + tx_q->tx_skbuff_dma[entry].buf_type = STMMAC_TXBUF_T_XDP_NDO; + } else { + struct page *page = virt_to_page(xdpf->data); + + dma_addr = page_pool_get_dma_addr(page) + sizeof(*xdpf) + + xdpf->headroom; + dma_sync_single_for_device(priv->device, dma_addr, + xdpf->len, DMA_BIDIRECTIONAL); + + tx_q->tx_skbuff_dma[entry].buf_type = STMMAC_TXBUF_T_XDP_TX; + } + + tx_q->tx_skbuff_dma[entry].buf = dma_addr; + tx_q->tx_skbuff_dma[entry].map_as_page = false; + tx_q->tx_skbuff_dma[entry].len = xdpf->len; + tx_q->tx_skbuff_dma[entry].last_segment = true; + tx_q->tx_skbuff_dma[entry].is_jumbo = false; + + tx_q->xdpf[entry] = xdpf; + + stmmac_set_desc_addr(priv, tx_desc, dma_addr); + + stmmac_prepare_tx_desc(priv, tx_desc, 1, xdpf->len, + true, priv->mode, true, true, + xdpf->len); + + tx_q->tx_count_frames++; + + if (tx_q->tx_count_frames % priv->tx_coal_frames[queue] == 0) + set_ic = true; + else + set_ic = false; + + if (set_ic) { + tx_q->tx_count_frames = 0; + stmmac_set_tx_ic(priv, tx_desc); + priv->xstats.tx_set_ic_bit++; + } + + stmmac_enable_dma_transmission(priv, priv->ioaddr); + + entry = STMMAC_GET_ENTRY(entry, priv->dma_tx_size); + tx_q->cur_tx = entry; + + return STMMAC_XDP_TX; +} + +static int stmmac_xdp_get_tx_queue(struct stmmac_priv *priv, + int cpu) +{ + int index = cpu; + + if (unlikely(index < 0)) + index = 0; + + while (index >= priv->plat->tx_queues_to_use) + index -= priv->plat->tx_queues_to_use; + + return index; +} + +static int stmmac_xdp_xmit_back(struct stmmac_priv *priv, + struct xdp_buff *xdp) +{ + struct xdp_frame *xdpf = xdp_convert_buff_to_frame(xdp); + int cpu = smp_processor_id(); + struct netdev_queue *nq; + int queue; + int res; + + if (unlikely(!xdpf)) + return STMMAC_XDP_CONSUMED; + + queue = stmmac_xdp_get_tx_queue(priv, cpu); + nq = netdev_get_tx_queue(priv->dev, queue); + + __netif_tx_lock(nq, cpu); + /* Avoids TX time-out as we are sharing with slow path */ + nq->trans_start = jiffies; + + res = stmmac_xdp_xmit_xdpf(priv, queue, xdpf, false); + if (res == STMMAC_XDP_TX) + stmmac_flush_tx_descriptors(priv, queue); + + __netif_tx_unlock(nq); + + return res; +} + +static struct sk_buff *stmmac_xdp_run_prog(struct stmmac_priv *priv, + struct xdp_buff *xdp) +{ + struct bpf_prog *prog; + int res; + u32 act; + + rcu_read_lock(); + + prog = READ_ONCE(priv->xdp_prog); + if (!prog) { + res = STMMAC_XDP_PASS; + goto unlock; + } + + act = bpf_prog_run_xdp(prog, xdp); + switch (act) { + case XDP_PASS: + res = STMMAC_XDP_PASS; + break; + case XDP_TX: + res = stmmac_xdp_xmit_back(priv, xdp); + break; + case XDP_REDIRECT: + if (xdp_do_redirect(priv->dev, xdp, prog) < 0) + res = STMMAC_XDP_CONSUMED; + else + res = STMMAC_XDP_REDIRECT; + break; + default: + bpf_warn_invalid_xdp_action(act); + fallthrough; + case XDP_ABORTED: + trace_xdp_exception(priv->dev, prog, act); + fallthrough; + case XDP_DROP: + res = STMMAC_XDP_CONSUMED; + break; + } + +unlock: + rcu_read_unlock(); + return ERR_PTR(-res); +} + +static void stmmac_finalize_xdp_rx(struct stmmac_priv *priv, + int xdp_status) +{ + int cpu = smp_processor_id(); + int queue; + + queue = stmmac_xdp_get_tx_queue(priv, cpu); + + if (xdp_status & STMMAC_XDP_TX) + stmmac_tx_timer_arm(priv, queue); + + if (xdp_status & STMMAC_XDP_REDIRECT) + xdp_do_flush(); +} + /** * stmmac_rx - manage the receive process * @priv: driver private structure @@ -4188,8 +4443,15 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) unsigned int count = 0, error = 0, len = 0; int status = 0, coe = priv->hw->rx_csum; unsigned int next_entry = rx_q->cur_rx; + enum dma_data_direction dma_dir; unsigned int desc_size; struct sk_buff *skb = NULL; + struct xdp_buff xdp; + int xdp_status = 0; + int buf_sz; + + dma_dir = page_pool_get_dma_dir(rx_q->page_pool); + buf_sz = DIV_ROUND_UP(priv->dma_buf_sz, PAGE_SIZE) * PAGE_SIZE; if (netif_msg_rx_status(priv)) { void *rx_head; @@ -4307,6 +4569,64 @@ read_again: } if (!skb) { + unsigned int pre_len, sync_len; + + dma_sync_single_for_cpu(priv->device, buf->addr, + buf1_len, dma_dir); + + xdp.data = page_address(buf->page) + buf->page_offset; + xdp.data_end = xdp.data + buf1_len; + xdp.data_hard_start = page_address(buf->page); + xdp_set_data_meta_invalid(&xdp); + xdp.frame_sz = buf_sz; + xdp.rxq = &rx_q->xdp_rxq; + + pre_len = xdp.data_end - xdp.data_hard_start - + buf->page_offset; + skb = stmmac_xdp_run_prog(priv, &xdp); + /* Due xdp_adjust_tail: DMA sync for_device + * cover max len CPU touch + */ + sync_len = xdp.data_end - xdp.data_hard_start - + buf->page_offset; + sync_len = max(sync_len, pre_len); + + /* For Not XDP_PASS verdict */ + if (IS_ERR(skb)) { + unsigned int xdp_res = -PTR_ERR(skb); + + if (xdp_res & STMMAC_XDP_CONSUMED) { + page_pool_put_page(rx_q->page_pool, + virt_to_head_page(xdp.data), + sync_len, true); + buf->page = NULL; + priv->dev->stats.rx_dropped++; + + /* Clear skb as it was set as + * status by XDP program. + */ + skb = NULL; + + if (unlikely((status & rx_not_ls))) + goto read_again; + + count++; + continue; + } else if (xdp_res & (STMMAC_XDP_TX | + STMMAC_XDP_REDIRECT)) { + xdp_status |= xdp_res; + buf->page = NULL; + skb = NULL; + count++; + continue; + } + } + } + + if (!skb) { + /* XDP program may expand or reduce tail */ + buf1_len = xdp.data_end - xdp.data; + skb = napi_alloc_skb(&ch->rx_napi, buf1_len); if (!skb) { priv->dev->stats.rx_dropped++; @@ -4314,10 +4634,8 @@ read_again: goto drain_data; } - dma_sync_single_for_cpu(priv->device, buf->addr, - buf1_len, DMA_FROM_DEVICE); - skb_copy_to_linear_data(skb, page_address(buf->page), - buf1_len); + /* XDP program may adjust header */ + skb_copy_to_linear_data(skb, xdp.data, buf1_len); skb_put(skb, buf1_len); /* Data payload copied into SKB, page ready for recycle */ @@ -4325,9 +4643,9 @@ read_again: buf->page = NULL; } else if (buf1_len) { dma_sync_single_for_cpu(priv->device, buf->addr, - buf1_len, DMA_FROM_DEVICE); + buf1_len, dma_dir); skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, - buf->page, 0, buf1_len, + buf->page, buf->page_offset, buf1_len, priv->dma_buf_sz); /* Data payload appended into SKB */ @@ -4337,7 +4655,7 @@ read_again: if (buf2_len) { dma_sync_single_for_cpu(priv->device, buf->sec_addr, - buf2_len, DMA_FROM_DEVICE); + buf2_len, dma_dir); skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, buf->sec_page, 0, buf2_len, priv->dma_buf_sz); @@ -4383,6 +4701,8 @@ drain_data: rx_q->state.len = len; } + stmmac_finalize_xdp_rx(priv, xdp_status); + stmmac_rx_refill(priv, queue); priv->xstats.rx_pkt_n += count; @@ -4495,6 +4815,11 @@ static int stmmac_change_mtu(struct net_device *dev, int new_mtu) return -EBUSY; } + if (stmmac_xdp_is_enabled(priv) && new_mtu > ETH_DATA_LEN) { + netdev_dbg(priv->dev, "Jumbo frames not supported for XDP\n"); + return -EINVAL; + } + new_mtu = STMMAC_ALIGN(new_mtu); /* If condition true, FIFO is too small or MTU too large */ @@ -4556,6 +4881,7 @@ static int stmmac_set_features(struct net_device *netdev, stmmac_rx_ipc(priv, priv->hw); sph_en = (priv->hw->rx_csum > 0) && priv->sph; + for (chan = 0; chan < priv->plat->rx_queues_to_use; chan++) stmmac_enable_sph(priv, priv->ioaddr, sph_en, chan); @@ -5291,6 +5617,60 @@ del_vlan_error: return ret; } +static int stmmac_bpf(struct net_device *dev, struct netdev_bpf *bpf) +{ + struct stmmac_priv *priv = netdev_priv(dev); + + switch (bpf->command) { + case XDP_SETUP_PROG: + return stmmac_xdp_set_prog(priv, bpf->prog, bpf->extack); + default: + return -EOPNOTSUPP; + } +} + +static int stmmac_xdp_xmit(struct net_device *dev, int num_frames, + struct xdp_frame **frames, u32 flags) +{ + struct stmmac_priv *priv = netdev_priv(dev); + int cpu = smp_processor_id(); + struct netdev_queue *nq; + int i, nxmit = 0; + int queue; + + if (unlikely(test_bit(STMMAC_DOWN, &priv->state))) + return -ENETDOWN; + + if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) + return -EINVAL; + + queue = stmmac_xdp_get_tx_queue(priv, cpu); + nq = netdev_get_tx_queue(priv->dev, queue); + + __netif_tx_lock(nq, cpu); + /* Avoids TX time-out as we are sharing with slow path */ + nq->trans_start = jiffies; + + for (i = 0; i < num_frames; i++) { + int res; + + res = stmmac_xdp_xmit_xdpf(priv, queue, frames[i], true); + if (res == STMMAC_XDP_CONSUMED) + break; + + nxmit++; + } + + if (flags & XDP_XMIT_FLUSH) { + stmmac_flush_tx_descriptors(priv, queue); + stmmac_tx_timer_arm(priv, queue); + } + + __netif_tx_unlock(nq); + + return nxmit; +} + static const struct net_device_ops stmmac_netdev_ops = { .ndo_open = stmmac_open, .ndo_start_xmit = stmmac_xmit, @@ -5309,6 +5689,8 @@ static const struct net_device_ops stmmac_netdev_ops = { .ndo_set_mac_address = stmmac_set_mac_address, .ndo_vlan_rx_add_vid = stmmac_vlan_rx_add_vid, .ndo_vlan_rx_kill_vid = stmmac_vlan_rx_kill_vid, + .ndo_bpf = stmmac_bpf, + .ndo_xdp_xmit = stmmac_xdp_xmit, }; static void stmmac_reset_subtask(struct stmmac_priv *priv) @@ -5697,7 +6079,8 @@ int stmmac_dvr_probe(struct device *device, if (priv->dma_cap.sphen) { ndev->hw_features |= NETIF_F_GRO; - priv->sph = true; + priv->sph_cap = true; + priv->sph = priv->sph_cap; dev_info(priv->device, "SPH feature enabled\n"); } diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_xdp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_xdp.c new file mode 100644 index 000000000000..bf38d231860b --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_xdp.c @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2021, Intel Corporation. */ + +#include "stmmac.h" +#include "stmmac_xdp.h" + +int stmmac_xdp_set_prog(struct stmmac_priv *priv, struct bpf_prog *prog, + struct netlink_ext_ack *extack) +{ + struct net_device *dev = priv->dev; + struct bpf_prog *old_prog; + bool need_update; + bool if_running; + + if_running = netif_running(dev); + + if (prog && dev->mtu > ETH_DATA_LEN) { + /* For now, the driver doesn't support XDP functionality with + * jumbo frames so we return error. + */ + NL_SET_ERR_MSG_MOD(extack, "Jumbo frames not supported"); + return -EOPNOTSUPP; + } + + need_update = !!priv->xdp_prog != !!prog; + if (if_running && need_update) + stmmac_release(dev); + + old_prog = xchg(&priv->xdp_prog, prog); + if (old_prog) + bpf_prog_put(old_prog); + + /* Disable RX SPH for XDP operation */ + priv->sph = priv->sph_cap && !stmmac_xdp_is_enabled(priv); + + if (if_running && need_update) + stmmac_open(dev); + + return 0; +} diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_xdp.h b/drivers/net/ethernet/stmicro/stmmac/stmmac_xdp.h new file mode 100644 index 000000000000..93948569d92a --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_xdp.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2021, Intel Corporation. */ + +#ifndef _STMMAC_XDP_H_ +#define _STMMAC_XDP_H_ + +#define STMMAC_MAX_RX_BUF_SIZE(num) (((num) * PAGE_SIZE) - XDP_PACKET_HEADROOM) + +int stmmac_xdp_set_prog(struct stmmac_priv *priv, struct bpf_prog *prog, + struct netlink_ext_ack *extack); + +#endif /* _STMMAC_XDP_H_ */