diff options
Diffstat (limited to 'drivers/net/ethernet/microsoft/mana/mana_en.c')
| -rw-r--r-- | drivers/net/ethernet/microsoft/mana/mana_en.c | 140 |
1 files changed, 125 insertions, 15 deletions
diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c index 72cbf45c42d8..498d0f999275 100644 --- a/drivers/net/ethernet/microsoft/mana/mana_en.c +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c @@ -1,6 +1,8 @@ // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause /* Copyright (c) 2021, Microsoft Corporation. */ +#include <uapi/linux/bpf.h> + #include <linux/inetdevice.h> #include <linux/etherdevice.h> #include <linux/ethtool.h> @@ -125,7 +127,7 @@ frag_err: return -ENOMEM; } -static int mana_start_xmit(struct sk_buff *skb, struct net_device *ndev) +int mana_start_xmit(struct sk_buff *skb, struct net_device *ndev) { enum mana_tx_pkt_format pkt_fmt = MANA_SHORT_PKT_FMT; struct mana_port_context *apc = netdev_priv(ndev); @@ -378,6 +380,7 @@ static const struct net_device_ops mana_devops = { .ndo_start_xmit = mana_start_xmit, .ndo_validate_addr = eth_validate_addr, .ndo_get_stats64 = mana_get_stats64, + .ndo_bpf = mana_bpf, }; static void mana_cleanup_port_context(struct mana_port_context *apc) @@ -749,6 +752,61 @@ out: return err; } +static int mana_fence_rq(struct mana_port_context *apc, struct mana_rxq *rxq) +{ + struct mana_fence_rq_resp resp = {}; + struct mana_fence_rq_req req = {}; + int err; + + init_completion(&rxq->fence_event); + + mana_gd_init_req_hdr(&req.hdr, MANA_FENCE_RQ, + sizeof(req), sizeof(resp)); + req.wq_obj_handle = rxq->rxobj; + + err = mana_send_request(apc->ac, &req, sizeof(req), &resp, + sizeof(resp)); + if (err) { + netdev_err(apc->ndev, "Failed to fence RQ %u: %d\n", + rxq->rxq_idx, err); + return err; + } + + err = mana_verify_resp_hdr(&resp.hdr, MANA_FENCE_RQ, sizeof(resp)); + if (err || resp.hdr.status) { + netdev_err(apc->ndev, "Failed to fence RQ %u: %d, 0x%x\n", + rxq->rxq_idx, err, resp.hdr.status); + if (!err) + err = -EPROTO; + + return err; + } + + if (wait_for_completion_timeout(&rxq->fence_event, 10 * HZ) == 0) { + netdev_err(apc->ndev, "Failed to fence RQ %u: timed out\n", + rxq->rxq_idx); + return -ETIMEDOUT; + } + + return 0; +} + +static void mana_fence_rqs(struct mana_port_context *apc) +{ + unsigned int rxq_idx; + struct mana_rxq *rxq; + int err; + + for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { + rxq = apc->rxqs[rxq_idx]; + err = mana_fence_rq(apc, rxq); + + /* In case of any error, use sleep instead. */ + if (err) + msleep(100); + } +} + static int mana_move_wq_tail(struct gdma_queue *wq, u32 num_units) { u32 used_space_old; @@ -906,6 +964,25 @@ static void mana_post_pkt_rxq(struct mana_rxq *rxq) WARN_ON_ONCE(recv_buf_oob->wqe_inf.wqe_size_in_bu != 1); } +static struct sk_buff *mana_build_skb(void *buf_va, uint pkt_len, + struct xdp_buff *xdp) +{ + struct sk_buff *skb = build_skb(buf_va, PAGE_SIZE); + + if (!skb) + return NULL; + + if (xdp->data_hard_start) { + skb_reserve(skb, xdp->data - xdp->data_hard_start); + skb_put(skb, xdp->data_end - xdp->data); + } else { + skb_reserve(skb, XDP_PACKET_HEADROOM); + skb_put(skb, pkt_len); + } + + return skb; +} + static void mana_rx_skb(void *buf_va, struct mana_rxcomp_oob *cqe, struct mana_rxq *rxq) { @@ -914,8 +991,10 @@ static void mana_rx_skb(void *buf_va, struct mana_rxcomp_oob *cqe, uint pkt_len = cqe->ppi[0].pkt_len; u16 rxq_idx = rxq->rxq_idx; struct napi_struct *napi; + struct xdp_buff xdp = {}; struct sk_buff *skb; u32 hash_value; + u32 act; rxq->rx_cq.work_done++; napi = &rxq->rx_cq.napi; @@ -925,15 +1004,16 @@ static void mana_rx_skb(void *buf_va, struct mana_rxcomp_oob *cqe, return; } - skb = build_skb(buf_va, PAGE_SIZE); + act = mana_run_xdp(ndev, rxq, &xdp, buf_va, pkt_len); - if (!skb) { - free_page((unsigned long)buf_va); - ++ndev->stats.rx_dropped; - return; - } + if (act != XDP_PASS && act != XDP_TX) + goto drop; + + skb = mana_build_skb(buf_va, pkt_len, &xdp); + + if (!skb) + goto drop; - skb_put(skb, pkt_len); skb->dev = napi->dev; skb->protocol = eth_type_trans(skb, ndev); @@ -954,12 +1034,24 @@ static void mana_rx_skb(void *buf_va, struct mana_rxcomp_oob *cqe, skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3); } + if (act == XDP_TX) { + skb_set_queue_mapping(skb, rxq_idx); + mana_xdp_tx(skb, ndev); + return; + } + napi_gro_receive(napi, skb); u64_stats_update_begin(&rx_stats->syncp); rx_stats->packets++; rx_stats->bytes += pkt_len; u64_stats_update_end(&rx_stats->syncp); + return; + +drop: + free_page((unsigned long)buf_va); + ++ndev->stats.rx_dropped; + return; } static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq, @@ -988,7 +1080,7 @@ static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq, return; case CQE_RX_OBJECT_FENCE: - netdev_err(ndev, "RX Fencing is unsupported\n"); + complete(&rxq->fence_event); return; default: @@ -1016,7 +1108,7 @@ static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq, new_page = alloc_page(GFP_ATOMIC); if (new_page) { - da = dma_map_page(dev, new_page, 0, rxq->datasize, + da = dma_map_page(dev, new_page, XDP_PACKET_HEADROOM, rxq->datasize, DMA_FROM_DEVICE); if (dma_mapping_error(dev, da)) { @@ -1291,6 +1383,9 @@ static void mana_destroy_rxq(struct mana_port_context *apc, napi_synchronize(napi); napi_disable(napi); + + xdp_rxq_info_unreg(&rxq->xdp_rxq); + netif_napi_del(napi); mana_destroy_wq_obj(apc, GDMA_RQ, rxq->rxobj); @@ -1342,7 +1437,8 @@ static int mana_alloc_rx_wqe(struct mana_port_context *apc, if (!page) return -ENOMEM; - da = dma_map_page(dev, page, 0, rxq->datasize, DMA_FROM_DEVICE); + da = dma_map_page(dev, page, XDP_PACKET_HEADROOM, rxq->datasize, + DMA_FROM_DEVICE); if (dma_mapping_error(dev, da)) { __free_page(page); @@ -1485,6 +1581,12 @@ static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc, gc->cq_table[cq->gdma_id] = cq->gdma_cq; netif_napi_add(ndev, &cq->napi, mana_poll, 1); + + WARN_ON(xdp_rxq_info_reg(&rxq->xdp_rxq, ndev, rxq_idx, + cq->napi.napi_id)); + WARN_ON(xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, + MEM_TYPE_PAGE_SHARED, NULL)); + napi_enable(&cq->napi); mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); @@ -1572,6 +1674,7 @@ int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx, bool update_hash, bool update_tab) { u32 queue_idx; + int err; int i; if (update_tab) { @@ -1581,7 +1684,13 @@ int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx, } } - return mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab); + err = mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab); + if (err) + return err; + + mana_fence_rqs(apc); + + return 0; } static int mana_init_port(struct net_device *ndev) @@ -1650,6 +1759,8 @@ int mana_alloc_queues(struct net_device *ndev) if (err) goto destroy_vport; + mana_chn_setxdp(apc, mana_xdp_get(apc)); + return 0; destroy_vport: @@ -1698,6 +1809,8 @@ static int mana_dealloc_queues(struct net_device *ndev) if (apc->port_is_up) return -EINVAL; + mana_chn_setxdp(apc, NULL); + /* No packet can be transmitted now since apc->port_is_up is false. * There is still a tiny chance that mana_poll_tx_cq() can re-enable * a txq because it may not timely see apc->port_is_up being cleared @@ -1724,9 +1837,6 @@ static int mana_dealloc_queues(struct net_device *ndev) return err; } - /* TODO: Implement RX fencing */ - ssleep(1); - mana_destroy_vport(apc); return 0; |