| /* |
| * Copyright (c) 2007 Mellanox Technologies. All rights reserved. |
| * |
| * This software is available to you under a choice of one of two |
| * licenses. You may choose to be licensed under the terms of the GNU |
| * General Public License (GPL) Version 2, available from the file |
| * COPYING in the main directory of this source tree, or the |
| * OpenIB.org BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| * |
| */ |
| |
| #include <net/busy_poll.h> |
| #include <linux/bpf.h> |
| #include <linux/bpf_trace.h> |
| #include <linux/mlx4/cq.h> |
| #include <linux/slab.h> |
| #include <linux/mlx4/qp.h> |
| #include <linux/skbuff.h> |
| #include <linux/rculist.h> |
| #include <linux/if_ether.h> |
| #include <linux/if_vlan.h> |
| #include <linux/vmalloc.h> |
| #include <linux/irq.h> |
| |
| #if IS_ENABLED(CONFIG_IPV6) |
| #include <net/ip6_checksum.h> |
| #endif |
| |
| #include "mlx4_en.h" |
| |
| static int mlx4_alloc_page(struct mlx4_en_priv *priv, |
| struct mlx4_en_rx_alloc *frag, |
| gfp_t gfp) |
| { |
| struct page *page; |
| dma_addr_t dma; |
| |
| page = alloc_page(gfp); |
| if (unlikely(!page)) |
| return -ENOMEM; |
| dma = dma_map_page(priv->ddev, page, 0, PAGE_SIZE, priv->dma_dir); |
| if (unlikely(dma_mapping_error(priv->ddev, dma))) { |
| __free_page(page); |
| return -ENOMEM; |
| } |
| frag->page = page; |
| frag->dma = dma; |
| frag->page_offset = priv->rx_headroom; |
| return 0; |
| } |
| |
| static int mlx4_en_alloc_frags(struct mlx4_en_priv *priv, |
| struct mlx4_en_rx_ring *ring, |
| struct mlx4_en_rx_desc *rx_desc, |
| struct mlx4_en_rx_alloc *frags, |
| gfp_t gfp) |
| { |
| int i; |
| |
| for (i = 0; i < priv->num_frags; i++, frags++) { |
| if (!frags->page) { |
| if (mlx4_alloc_page(priv, frags, gfp)) |
| return -ENOMEM; |
| ring->rx_alloc_pages++; |
| } |
| rx_desc->data[i].addr = cpu_to_be64(frags->dma + |
| frags->page_offset); |
| } |
| return 0; |
| } |
| |
| static void mlx4_en_free_frag(const struct mlx4_en_priv *priv, |
| struct mlx4_en_rx_alloc *frag) |
| { |
| if (frag->page) { |
| dma_unmap_page(priv->ddev, frag->dma, |
| PAGE_SIZE, priv->dma_dir); |
| __free_page(frag->page); |
| } |
| /* We need to clear all fields, otherwise a change of priv->log_rx_info |
| * could lead to see garbage later in frag->page. |
| */ |
| memset(frag, 0, sizeof(*frag)); |
| } |
| |
| static void mlx4_en_init_rx_desc(const struct mlx4_en_priv *priv, |
| struct mlx4_en_rx_ring *ring, int index) |
| { |
| struct mlx4_en_rx_desc *rx_desc = ring->buf + ring->stride * index; |
| int possible_frags; |
| int i; |
| |
| /* Set size and memtype fields */ |
| for (i = 0; i < priv->num_frags; i++) { |
| rx_desc->data[i].byte_count = |
| cpu_to_be32(priv->frag_info[i].frag_size); |
| rx_desc->data[i].lkey = cpu_to_be32(priv->mdev->mr.key); |
| } |
| |
| /* If the number of used fragments does not fill up the ring stride, |
| * remaining (unused) fragments must be padded with null address/size |
| * and a special memory key */ |
| possible_frags = (ring->stride - sizeof(struct mlx4_en_rx_desc)) / DS_SIZE; |
| for (i = priv->num_frags; i < possible_frags; i++) { |
| rx_desc->data[i].byte_count = 0; |
| rx_desc->data[i].lkey = cpu_to_be32(MLX4_EN_MEMTYPE_PAD); |
| rx_desc->data[i].addr = 0; |
| } |
| } |
| |
| static int mlx4_en_prepare_rx_desc(struct mlx4_en_priv *priv, |
| struct mlx4_en_rx_ring *ring, int index, |
| gfp_t gfp) |
| { |
| struct mlx4_en_rx_desc *rx_desc = ring->buf + |
| (index << ring->log_stride); |
| struct mlx4_en_rx_alloc *frags = ring->rx_info + |
| (index << priv->log_rx_info); |
| if (likely(ring->page_cache.index > 0)) { |
| /* XDP uses a single page per frame */ |
| if (!frags->page) { |
| ring->page_cache.index--; |
| frags->page = ring->page_cache.buf[ring->page_cache.index].page; |
| frags->dma = ring->page_cache.buf[ring->page_cache.index].dma; |
| } |
| frags->page_offset = XDP_PACKET_HEADROOM; |
| rx_desc->data[0].addr = cpu_to_be64(frags->dma + |
| XDP_PACKET_HEADROOM); |
| return 0; |
| } |
| |
| return mlx4_en_alloc_frags(priv, ring, rx_desc, frags, gfp); |
| } |
| |
| static bool mlx4_en_is_ring_empty(const struct mlx4_en_rx_ring *ring) |
| { |
| return ring->prod == ring->cons; |
| } |
| |
| static inline void mlx4_en_update_rx_prod_db(struct mlx4_en_rx_ring *ring) |
| { |
| *ring->wqres.db.db = cpu_to_be32(ring->prod & 0xffff); |
| } |
| |
| /* slow path */ |
| static void mlx4_en_free_rx_desc(const struct mlx4_en_priv *priv, |
| struct mlx4_en_rx_ring *ring, |
| int index) |
| { |
| struct mlx4_en_rx_alloc *frags; |
| int nr; |
| |
| frags = ring->rx_info + (index << priv->log_rx_info); |
| for (nr = 0; nr < priv->num_frags; nr++) { |
| en_dbg(DRV, priv, "Freeing fragment:%d\n", nr); |
| mlx4_en_free_frag(priv, frags + nr); |
| } |
| } |
| |
| /* Function not in fast-path */ |
| static int mlx4_en_fill_rx_buffers(struct mlx4_en_priv *priv) |
| { |
| struct mlx4_en_rx_ring *ring; |
| int ring_ind; |
| int buf_ind; |
| int new_size; |
| |
| for (buf_ind = 0; buf_ind < priv->prof->rx_ring_size; buf_ind++) { |
| for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) { |
| ring = priv->rx_ring[ring_ind]; |
| |
| if (mlx4_en_prepare_rx_desc(priv, ring, |
| ring->actual_size, |
| GFP_KERNEL | __GFP_COLD)) { |
| if (ring->actual_size < MLX4_EN_MIN_RX_SIZE) { |
| en_err(priv, "Failed to allocate enough rx buffers\n"); |
| return -ENOMEM; |
| } else { |
| new_size = rounddown_pow_of_two(ring->actual_size); |
| en_warn(priv, "Only %d buffers allocated reducing ring size to %d\n", |
| ring->actual_size, new_size); |
| goto reduce_rings; |
| } |
| } |
| ring->actual_size++; |
| ring->prod++; |
| } |
| } |
| return 0; |
| |
| reduce_rings: |
| for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) { |
| ring = priv->rx_ring[ring_ind]; |
| while (ring->actual_size > new_size) { |
| ring->actual_size--; |
| ring->prod--; |
| mlx4_en_free_rx_desc(priv, ring, ring->actual_size); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void mlx4_en_free_rx_buf(struct mlx4_en_priv *priv, |
| struct mlx4_en_rx_ring *ring) |
| { |
| int index; |
| |
| en_dbg(DRV, priv, "Freeing Rx buf - cons:%d prod:%d\n", |
| ring->cons, ring->prod); |
| |
| /* Unmap and free Rx buffers */ |
| for (index = 0; index < ring->size; index++) { |
| en_dbg(DRV, priv, "Processing descriptor:%d\n", index); |
| mlx4_en_free_rx_desc(priv, ring, index); |
| } |
| ring->cons = 0; |
| ring->prod = 0; |
| } |
| |
| void mlx4_en_set_num_rx_rings(struct mlx4_en_dev *mdev) |
| { |
| int i; |
| int num_of_eqs; |
| int num_rx_rings; |
| struct mlx4_dev *dev = mdev->dev; |
| |
| mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { |
| num_of_eqs = max_t(int, MIN_RX_RINGS, |
| min_t(int, |
| mlx4_get_eqs_per_port(mdev->dev, i), |
| DEF_RX_RINGS)); |
| |
| num_rx_rings = mlx4_low_memory_profile() ? MIN_RX_RINGS : |
| min_t(int, num_of_eqs, |
| netif_get_num_default_rss_queues()); |
| mdev->profile.prof[i].rx_ring_num = |
| rounddown_pow_of_two(num_rx_rings); |
| } |
| } |
| |
| int mlx4_en_create_rx_ring(struct mlx4_en_priv *priv, |
| struct mlx4_en_rx_ring **pring, |
| u32 size, u16 stride, int node) |
| { |
| struct mlx4_en_dev *mdev = priv->mdev; |
| struct mlx4_en_rx_ring *ring; |
| int err = -ENOMEM; |
| int tmp; |
| |
| ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, node); |
| if (!ring) { |
| ring = kzalloc(sizeof(*ring), GFP_KERNEL); |
| if (!ring) { |
| en_err(priv, "Failed to allocate RX ring structure\n"); |
| return -ENOMEM; |
| } |
| } |
| |
| ring->prod = 0; |
| ring->cons = 0; |
| ring->size = size; |
| ring->size_mask = size - 1; |
| ring->stride = stride; |
| ring->log_stride = ffs(ring->stride) - 1; |
| ring->buf_size = ring->size * ring->stride + TXBB_SIZE; |
| |
| tmp = size * roundup_pow_of_two(MLX4_EN_MAX_RX_FRAGS * |
| sizeof(struct mlx4_en_rx_alloc)); |
| ring->rx_info = vzalloc_node(tmp, node); |
| if (!ring->rx_info) { |
| ring->rx_info = vzalloc(tmp); |
| if (!ring->rx_info) { |
| err = -ENOMEM; |
| goto err_ring; |
| } |
| } |
| |
| en_dbg(DRV, priv, "Allocated rx_info ring at addr:%p size:%d\n", |
| ring->rx_info, tmp); |
| |
| /* Allocate HW buffers on provided NUMA node */ |
| set_dev_node(&mdev->dev->persist->pdev->dev, node); |
| err = mlx4_alloc_hwq_res(mdev->dev, &ring->wqres, ring->buf_size); |
| set_dev_node(&mdev->dev->persist->pdev->dev, mdev->dev->numa_node); |
| if (err) |
| goto err_info; |
| |
| ring->buf = ring->wqres.buf.direct.buf; |
| |
| ring->hwtstamp_rx_filter = priv->hwtstamp_config.rx_filter; |
| |
| *pring = ring; |
| return 0; |
| |
| err_info: |
| vfree(ring->rx_info); |
| ring->rx_info = NULL; |
| err_ring: |
| kfree(ring); |
| *pring = NULL; |
| |
| return err; |
| } |
| |
| int mlx4_en_activate_rx_rings(struct mlx4_en_priv *priv) |
| { |
| struct mlx4_en_rx_ring *ring; |
| int i; |
| int ring_ind; |
| int err; |
| int stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) + |
| DS_SIZE * priv->num_frags); |
| |
| for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) { |
| ring = priv->rx_ring[ring_ind]; |
| |
| ring->prod = 0; |
| ring->cons = 0; |
| ring->actual_size = 0; |
| ring->cqn = priv->rx_cq[ring_ind]->mcq.cqn; |
| |
| ring->stride = stride; |
| if (ring->stride <= TXBB_SIZE) { |
| /* Stamp first unused send wqe */ |
| __be32 *ptr = (__be32 *)ring->buf; |
| __be32 stamp = cpu_to_be32(1 << STAMP_SHIFT); |
| *ptr = stamp; |
| /* Move pointer to start of rx section */ |
| ring->buf += TXBB_SIZE; |
| } |
| |
| ring->log_stride = ffs(ring->stride) - 1; |
| ring->buf_size = ring->size * ring->stride; |
| |
| memset(ring->buf, 0, ring->buf_size); |
| mlx4_en_update_rx_prod_db(ring); |
| |
| /* Initialize all descriptors */ |
| for (i = 0; i < ring->size; i++) |
| mlx4_en_init_rx_desc(priv, ring, i); |
| } |
| err = mlx4_en_fill_rx_buffers(priv); |
| if (err) |
| goto err_buffers; |
| |
| for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) { |
| ring = priv->rx_ring[ring_ind]; |
| |
| ring->size_mask = ring->actual_size - 1; |
| mlx4_en_update_rx_prod_db(ring); |
| } |
| |
| return 0; |
| |
| err_buffers: |
| for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) |
| mlx4_en_free_rx_buf(priv, priv->rx_ring[ring_ind]); |
| |
| ring_ind = priv->rx_ring_num - 1; |
| while (ring_ind >= 0) { |
| if (priv->rx_ring[ring_ind]->stride <= TXBB_SIZE) |
| priv->rx_ring[ring_ind]->buf -= TXBB_SIZE; |
| ring_ind--; |
| } |
| return err; |
| } |
| |
| /* We recover from out of memory by scheduling our napi poll |
| * function (mlx4_en_process_cq), which tries to allocate |
| * all missing RX buffers (call to mlx4_en_refill_rx_buffers). |
| */ |
| void mlx4_en_recover_from_oom(struct mlx4_en_priv *priv) |
| { |
| int ring; |
| |
| if (!priv->port_up) |
| return; |
| |
| for (ring = 0; ring < priv->rx_ring_num; ring++) { |
| if (mlx4_en_is_ring_empty(priv->rx_ring[ring])) { |
| local_bh_disable(); |
| napi_reschedule(&priv->rx_cq[ring]->napi); |
| local_bh_enable(); |
| } |
| } |
| } |
| |
| /* When the rx ring is running in page-per-packet mode, a released frame can go |
| * directly into a small cache, to avoid unmapping or touching the page |
| * allocator. In bpf prog performance scenarios, buffers are either forwarded |
| * or dropped, never converted to skbs, so every page can come directly from |
| * this cache when it is sized to be a multiple of the napi budget. |
| */ |
| bool mlx4_en_rx_recycle(struct mlx4_en_rx_ring *ring, |
| struct mlx4_en_rx_alloc *frame) |
| { |
| struct mlx4_en_page_cache *cache = &ring->page_cache; |
| |
| if (cache->index >= MLX4_EN_CACHE_SIZE) |
| return false; |
| |
| cache->buf[cache->index].page = frame->page; |
| cache->buf[cache->index].dma = frame->dma; |
| cache->index++; |
| return true; |
| } |
| |
| void mlx4_en_destroy_rx_ring(struct mlx4_en_priv *priv, |
| struct mlx4_en_rx_ring **pring, |
| u32 size, u16 stride) |
| { |
| struct mlx4_en_dev *mdev = priv->mdev; |
| struct mlx4_en_rx_ring *ring = *pring; |
| struct bpf_prog *old_prog; |
| |
| old_prog = rcu_dereference_protected( |
| ring->xdp_prog, |
| lockdep_is_held(&mdev->state_lock)); |
| if (old_prog) |
| bpf_prog_put(old_prog); |
| mlx4_free_hwq_res(mdev->dev, &ring->wqres, size * stride + TXBB_SIZE); |
| vfree(ring->rx_info); |
| ring->rx_info = NULL; |
| kfree(ring); |
| *pring = NULL; |
| } |
| |
| void mlx4_en_deactivate_rx_ring(struct mlx4_en_priv *priv, |
| struct mlx4_en_rx_ring *ring) |
| { |
| int i; |
| |
| for (i = 0; i < ring->page_cache.index; i++) { |
| dma_unmap_page(priv->ddev, ring->page_cache.buf[i].dma, |
| PAGE_SIZE, priv->dma_dir); |
| put_page(ring->page_cache.buf[i].page); |
| } |
| ring->page_cache.index = 0; |
| mlx4_en_free_rx_buf(priv, ring); |
| if (ring->stride <= TXBB_SIZE) |
| ring->buf -= TXBB_SIZE; |
| } |
| |
| |
| static int mlx4_en_complete_rx_desc(struct mlx4_en_priv *priv, |
| struct mlx4_en_rx_alloc *frags, |
| struct sk_buff *skb, |
| int length) |
| { |
| const struct mlx4_en_frag_info *frag_info = priv->frag_info; |
| unsigned int truesize = 0; |
| int nr, frag_size; |
| struct page *page; |
| dma_addr_t dma; |
| bool release; |
| |
| /* Collect used fragments while replacing them in the HW descriptors */ |
| for (nr = 0;; frags++) { |
| frag_size = min_t(int, length, frag_info->frag_size); |
| |
| page = frags->page; |
| if (unlikely(!page)) |
| goto fail; |
| |
| dma = frags->dma; |
| dma_sync_single_range_for_cpu(priv->ddev, dma, frags->page_offset, |
| frag_size, priv->dma_dir); |
| |
| __skb_fill_page_desc(skb, nr, page, frags->page_offset, |
| frag_size); |
| |
| truesize += frag_info->frag_stride; |
| if (frag_info->frag_stride == PAGE_SIZE / 2) { |
| frags->page_offset ^= PAGE_SIZE / 2; |
| release = page_count(page) != 1 || |
| page_is_pfmemalloc(page) || |
| page_to_nid(page) != numa_mem_id(); |
| } else { |
| u32 sz_align = ALIGN(frag_size, SMP_CACHE_BYTES); |
| |
| frags->page_offset += sz_align; |
| release = frags->page_offset + frag_info->frag_size > PAGE_SIZE; |
| } |
| if (release) { |
| dma_unmap_page(priv->ddev, dma, PAGE_SIZE, priv->dma_dir); |
| frags->page = NULL; |
| } else { |
| page_ref_inc(page); |
| } |
| |
| nr++; |
| length -= frag_size; |
| if (!length) |
| break; |
| frag_info++; |
| } |
| skb->truesize += truesize; |
| return nr; |
| |
| fail: |
| while (nr > 0) { |
| nr--; |
| __skb_frag_unref(skb_shinfo(skb)->frags + nr); |
| } |
| return 0; |
| } |
| |
| static void validate_loopback(struct mlx4_en_priv *priv, void *va) |
| { |
| const unsigned char *data = va + ETH_HLEN; |
| int i; |
| |
| for (i = 0; i < MLX4_LOOPBACK_TEST_PAYLOAD; i++) { |
| if (data[i] != (unsigned char)i) |
| return; |
| } |
| /* Loopback found */ |
| priv->loopback_ok = 1; |
| } |
| |
| static void mlx4_en_refill_rx_buffers(struct mlx4_en_priv *priv, |
| struct mlx4_en_rx_ring *ring) |
| { |
| u32 missing = ring->actual_size - (ring->prod - ring->cons); |
| |
| /* Try to batch allocations, but not too much. */ |
| if (missing < 8) |
| return; |
| do { |
| if (mlx4_en_prepare_rx_desc(priv, ring, |
| ring->prod & ring->size_mask, |
| GFP_ATOMIC | __GFP_COLD | |
| __GFP_MEMALLOC)) |
| break; |
| ring->prod++; |
| } while (likely(--missing)); |
| |
| mlx4_en_update_rx_prod_db(ring); |
| } |
| |
| /* When hardware doesn't strip the vlan, we need to calculate the checksum |
| * over it and add it to the hardware's checksum calculation |
| */ |
| static inline __wsum get_fixed_vlan_csum(__wsum hw_checksum, |
| struct vlan_hdr *vlanh) |
| { |
| return csum_add(hw_checksum, *(__wsum *)vlanh); |
| } |
| |
| /* Although the stack expects checksum which doesn't include the pseudo |
| * header, the HW adds it. To address that, we are subtracting the pseudo |
| * header checksum from the checksum value provided by the HW. |
| */ |
| static void get_fixed_ipv4_csum(__wsum hw_checksum, struct sk_buff *skb, |
| struct iphdr *iph) |
| { |
| __u16 length_for_csum = 0; |
| __wsum csum_pseudo_header = 0; |
| |
| length_for_csum = (be16_to_cpu(iph->tot_len) - (iph->ihl << 2)); |
| csum_pseudo_header = csum_tcpudp_nofold(iph->saddr, iph->daddr, |
| length_for_csum, iph->protocol, 0); |
| skb->csum = csum_sub(hw_checksum, csum_pseudo_header); |
| } |
| |
| #if IS_ENABLED(CONFIG_IPV6) |
| /* In IPv6 packets, besides subtracting the pseudo header checksum, |
| * we also compute/add the IP header checksum which |
| * is not added by the HW. |
| */ |
| static int get_fixed_ipv6_csum(__wsum hw_checksum, struct sk_buff *skb, |
| struct ipv6hdr *ipv6h) |
| { |
| __wsum csum_pseudo_hdr = 0; |
| |
| if (unlikely(ipv6h->nexthdr == IPPROTO_FRAGMENT || |
| ipv6h->nexthdr == IPPROTO_HOPOPTS)) |
| return -1; |
| hw_checksum = csum_add(hw_checksum, (__force __wsum)htons(ipv6h->nexthdr)); |
| |
| csum_pseudo_hdr = csum_partial(&ipv6h->saddr, |
| sizeof(ipv6h->saddr) + sizeof(ipv6h->daddr), 0); |
| csum_pseudo_hdr = csum_add(csum_pseudo_hdr, (__force __wsum)ipv6h->payload_len); |
| csum_pseudo_hdr = csum_add(csum_pseudo_hdr, (__force __wsum)ntohs(ipv6h->nexthdr)); |
| |
| skb->csum = csum_sub(hw_checksum, csum_pseudo_hdr); |
| skb->csum = csum_add(skb->csum, csum_partial(ipv6h, sizeof(struct ipv6hdr), 0)); |
| return 0; |
| } |
| #endif |
| static int check_csum(struct mlx4_cqe *cqe, struct sk_buff *skb, void *va, |
| netdev_features_t dev_features) |
| { |
| __wsum hw_checksum = 0; |
| |
| void *hdr = (u8 *)va + sizeof(struct ethhdr); |
| |
| hw_checksum = csum_unfold((__force __sum16)cqe->checksum); |
| |
| if (cqe->vlan_my_qpn & cpu_to_be32(MLX4_CQE_CVLAN_PRESENT_MASK) && |
| !(dev_features & NETIF_F_HW_VLAN_CTAG_RX)) { |
| hw_checksum = get_fixed_vlan_csum(hw_checksum, hdr); |
| hdr += sizeof(struct vlan_hdr); |
| } |
| |
| if (cqe->status & cpu_to_be16(MLX4_CQE_STATUS_IPV4)) |
| get_fixed_ipv4_csum(hw_checksum, skb, hdr); |
| #if IS_ENABLED(CONFIG_IPV6) |
| else if (cqe->status & cpu_to_be16(MLX4_CQE_STATUS_IPV6)) |
| if (unlikely(get_fixed_ipv6_csum(hw_checksum, skb, hdr))) |
| return -1; |
| #endif |
| return 0; |
| } |
| |
| int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int budget) |
| { |
| struct mlx4_en_priv *priv = netdev_priv(dev); |
| int factor = priv->cqe_factor; |
| struct mlx4_en_rx_ring *ring; |
| struct bpf_prog *xdp_prog; |
| int cq_ring = cq->ring; |
| bool doorbell_pending; |
| struct mlx4_cqe *cqe; |
| int polled = 0; |
| int index; |
| |
| if (unlikely(!priv->port_up)) |
| return 0; |
| |
| if (unlikely(budget <= 0)) |
| return polled; |
| |
| ring = priv->rx_ring[cq_ring]; |
| |
| /* Protect accesses to: ring->xdp_prog, priv->mac_hash list */ |
| rcu_read_lock(); |
| xdp_prog = rcu_dereference(ring->xdp_prog); |
| doorbell_pending = 0; |
| |
| /* We assume a 1:1 mapping between CQEs and Rx descriptors, so Rx |
| * descriptor offset can be deduced from the CQE index instead of |
| * reading 'cqe->index' */ |
| index = cq->mcq.cons_index & ring->size_mask; |
| cqe = mlx4_en_get_cqe(cq->buf, index, priv->cqe_size) + factor; |
| |
| /* Process all completed CQEs */ |
| while (XNOR(cqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK, |
| cq->mcq.cons_index & cq->size)) { |
| struct mlx4_en_rx_alloc *frags; |
| enum pkt_hash_types hash_type; |
| struct sk_buff *skb; |
| unsigned int length; |
| int ip_summed; |
| void *va; |
| int nr; |
| |
| frags = ring->rx_info + (index << priv->log_rx_info); |
| va = page_address(frags[0].page) + frags[0].page_offset; |
| prefetchw(va); |
| /* |
| * make sure we read the CQE after we read the ownership bit |
| */ |
| dma_rmb(); |
| |
| /* Drop packet on bad receive or bad checksum */ |
| if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == |
| MLX4_CQE_OPCODE_ERROR)) { |
| en_err(priv, "CQE completed in error - vendor syndrom:%d syndrom:%d\n", |
| ((struct mlx4_err_cqe *)cqe)->vendor_err_syndrome, |
| ((struct mlx4_err_cqe *)cqe)->syndrome); |
| goto next; |
| } |
| if (unlikely(cqe->badfcs_enc & MLX4_CQE_BAD_FCS)) { |
| en_dbg(RX_ERR, priv, "Accepted frame with bad FCS\n"); |
| goto next; |
| } |
| |
| /* Check if we need to drop the packet if SRIOV is not enabled |
| * and not performing the selftest or flb disabled |
| */ |
| if (priv->flags & MLX4_EN_FLAG_RX_FILTER_NEEDED) { |
| const struct ethhdr *ethh = va; |
| dma_addr_t dma; |
| /* Get pointer to first fragment since we haven't |
| * skb yet and cast it to ethhdr struct |
| */ |
| dma = frags[0].dma + frags[0].page_offset; |
| dma_sync_single_for_cpu(priv->ddev, dma, sizeof(*ethh), |
| DMA_FROM_DEVICE); |
| |
| if (is_multicast_ether_addr(ethh->h_dest)) { |
| struct mlx4_mac_entry *entry; |
| struct hlist_head *bucket; |
| unsigned int mac_hash; |
| |
| /* Drop the packet, since HW loopback-ed it */ |
| mac_hash = ethh->h_source[MLX4_EN_MAC_HASH_IDX]; |
| bucket = &priv->mac_hash[mac_hash]; |
| hlist_for_each_entry_rcu(entry, bucket, hlist) { |
| if (ether_addr_equal_64bits(entry->mac, |
| ethh->h_source)) |
| goto next; |
| } |
| } |
| } |
| |
| if (unlikely(priv->validate_loopback)) { |
| validate_loopback(priv, va); |
| goto next; |
| } |
| |
| /* |
| * Packet is OK - process it. |
| */ |
| length = be32_to_cpu(cqe->byte_cnt); |
| length -= ring->fcs_del; |
| |
| /* A bpf program gets first chance to drop the packet. It may |
| * read bytes but not past the end of the frag. |
| */ |
| if (xdp_prog) { |
| struct xdp_buff xdp; |
| dma_addr_t dma; |
| void *orig_data; |
| u32 act; |
| |
| dma = frags[0].dma + frags[0].page_offset; |
| dma_sync_single_for_cpu(priv->ddev, dma, |
| priv->frag_info[0].frag_size, |
| DMA_FROM_DEVICE); |
| |
| xdp.data_hard_start = va - frags[0].page_offset; |
| xdp.data = va; |
| xdp.data_end = xdp.data + length; |
| orig_data = xdp.data; |
| |
| act = bpf_prog_run_xdp(xdp_prog, &xdp); |
| |
| if (xdp.data != orig_data) { |
| length = xdp.data_end - xdp.data; |
| frags[0].page_offset = xdp.data - |
| xdp.data_hard_start; |
| va = xdp.data; |
| } |
| |
| switch (act) { |
| case XDP_PASS: |
| break; |
| case XDP_TX: |
| if (likely(!mlx4_en_xmit_frame(ring, frags, dev, |
| length, cq_ring, |
| &doorbell_pending))) { |
| frags[0].page = NULL; |
| goto next; |
| } |
| trace_xdp_exception(dev, xdp_prog, act); |
| goto xdp_drop_no_cnt; /* Drop on xmit failure */ |
| default: |
| bpf_warn_invalid_xdp_action(act); |
| case XDP_ABORTED: |
| trace_xdp_exception(dev, xdp_prog, act); |
| case XDP_DROP: |
| ring->xdp_drop++; |
| xdp_drop_no_cnt: |
| goto next; |
| } |
| } |
| |
| ring->bytes += length; |
| ring->packets++; |
| |
| skb = napi_get_frags(&cq->napi); |
| if (unlikely(!skb)) |
| goto next; |
| |
| if (unlikely(ring->hwtstamp_rx_filter == HWTSTAMP_FILTER_ALL)) { |
| u64 timestamp = mlx4_en_get_cqe_ts(cqe); |
| |
| mlx4_en_fill_hwtstamps(priv->mdev, skb_hwtstamps(skb), |
| timestamp); |
| } |
| skb_record_rx_queue(skb, cq_ring); |
| |
| if (likely(dev->features & NETIF_F_RXCSUM)) { |
| if (cqe->status & cpu_to_be16(MLX4_CQE_STATUS_TCP | |
| MLX4_CQE_STATUS_UDP)) { |
| if ((cqe->status & cpu_to_be16(MLX4_CQE_STATUS_IPOK)) && |
| cqe->checksum == cpu_to_be16(0xffff)) { |
| bool l2_tunnel = (dev->hw_enc_features & NETIF_F_RXCSUM) && |
| (cqe->vlan_my_qpn & cpu_to_be32(MLX4_CQE_L2_TUNNEL)); |
| |
| ip_summed = CHECKSUM_UNNECESSARY; |
| hash_type = PKT_HASH_TYPE_L4; |
| if (l2_tunnel) |
| skb->csum_level = 1; |
| ring->csum_ok++; |
| } else { |
| goto csum_none; |
| } |
| } else { |
| if (priv->flags & MLX4_EN_FLAG_RX_CSUM_NON_TCP_UDP && |
| (cqe->status & cpu_to_be16(MLX4_CQE_STATUS_IPV4 | |
| MLX4_CQE_STATUS_IPV6))) { |
| if (check_csum(cqe, skb, va, dev->features)) { |
| goto csum_none; |
| } else { |
| ip_summed = CHECKSUM_COMPLETE; |
| hash_type = PKT_HASH_TYPE_L3; |
| ring->csum_complete++; |
| } |
| } else { |
| goto csum_none; |
| } |
| } |
| } else { |
| csum_none: |
| ip_summed = CHECKSUM_NONE; |
| hash_type = PKT_HASH_TYPE_L3; |
| ring->csum_none++; |
| } |
| skb->ip_summed = ip_summed; |
| if (dev->features & NETIF_F_RXHASH) |
| skb_set_hash(skb, |
| be32_to_cpu(cqe->immed_rss_invalid), |
| hash_type); |
| |
| if ((cqe->vlan_my_qpn & |
| cpu_to_be32(MLX4_CQE_CVLAN_PRESENT_MASK)) && |
| (dev->features & NETIF_F_HW_VLAN_CTAG_RX)) |
| __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
| be16_to_cpu(cqe->sl_vid)); |
| else if ((cqe->vlan_my_qpn & |
| cpu_to_be32(MLX4_CQE_SVLAN_PRESENT_MASK)) && |
| (dev->features & NETIF_F_HW_VLAN_STAG_RX)) |
| __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021AD), |
| be16_to_cpu(cqe->sl_vid)); |
| |
| nr = mlx4_en_complete_rx_desc(priv, frags, skb, length); |
| if (likely(nr)) { |
| skb_shinfo(skb)->nr_frags = nr; |
| skb->len = length; |
| skb->data_len = length; |
| napi_gro_frags(&cq->napi); |
| } else { |
| skb->vlan_tci = 0; |
| skb_clear_hash(skb); |
| } |
| next: |
| ++cq->mcq.cons_index; |
| index = (cq->mcq.cons_index) & ring->size_mask; |
| cqe = mlx4_en_get_cqe(cq->buf, index, priv->cqe_size) + factor; |
| if (unlikely(++polled == budget)) |
| break; |
| } |
| |
| rcu_read_unlock(); |
| |
| if (likely(polled)) { |
| if (doorbell_pending) { |
| priv->tx_cq[TX_XDP][cq_ring]->xdp_busy = true; |
| mlx4_en_xmit_doorbell(priv->tx_ring[TX_XDP][cq_ring]); |
| } |
| |
| mlx4_cq_set_ci(&cq->mcq); |
| wmb(); /* ensure HW sees CQ consumer before we post new buffers */ |
| ring->cons = cq->mcq.cons_index; |
| } |
| AVG_PERF_COUNTER(priv->pstats.rx_coal_avg, polled); |
| |
| mlx4_en_refill_rx_buffers(priv, ring); |
| |
| return polled; |
| } |
| |
| |
| void mlx4_en_rx_irq(struct mlx4_cq *mcq) |
| { |
| struct mlx4_en_cq *cq = container_of(mcq, struct mlx4_en_cq, mcq); |
| struct mlx4_en_priv *priv = netdev_priv(cq->dev); |
| |
| if (likely(priv->port_up)) |
| napi_schedule_irqoff(&cq->napi); |
| else |
| mlx4_en_arm_cq(priv, cq); |
| } |
| |
| /* Rx CQ polling - called by NAPI */ |
| int mlx4_en_poll_rx_cq(struct napi_struct *napi, int budget) |
| { |
| struct mlx4_en_cq *cq = container_of(napi, struct mlx4_en_cq, napi); |
| struct net_device *dev = cq->dev; |
| struct mlx4_en_priv *priv = netdev_priv(dev); |
| struct mlx4_en_cq *xdp_tx_cq = NULL; |
| bool clean_complete = true; |
| int done; |
| |
| if (priv->tx_ring_num[TX_XDP]) { |
| xdp_tx_cq = priv->tx_cq[TX_XDP][cq->ring]; |
| if (xdp_tx_cq->xdp_busy) { |
| clean_complete = mlx4_en_process_tx_cq(dev, xdp_tx_cq, |
| budget); |
| xdp_tx_cq->xdp_busy = !clean_complete; |
| } |
| } |
| |
| done = mlx4_en_process_rx_cq(dev, cq, budget); |
| |
| /* If we used up all the quota - we're probably not done yet... */ |
| if (done == budget || !clean_complete) { |
| const struct cpumask *aff; |
| struct irq_data *idata; |
| int cpu_curr; |
| |
| /* in case we got here because of !clean_complete */ |
| done = budget; |
| |
| INC_PERF_COUNTER(priv->pstats.napi_quota); |
| |
| cpu_curr = smp_processor_id(); |
| idata = irq_desc_get_irq_data(cq->irq_desc); |
| aff = irq_data_get_affinity_mask(idata); |
| |
| if (likely(cpumask_test_cpu(cpu_curr, aff))) |
| return budget; |
| |
| /* Current cpu is not according to smp_irq_affinity - |
| * probably affinity changed. Need to stop this NAPI |
| * poll, and restart it on the right CPU. |
| * Try to avoid returning a too small value (like 0), |
| * to not fool net_rx_action() and its netdev_budget |
| */ |
| if (done) |
| done--; |
| } |
| /* Done for now */ |
| if (likely(napi_complete_done(napi, done))) |
| mlx4_en_arm_cq(priv, cq); |
| return done; |
| } |
| |
| void mlx4_en_calc_rx_buf(struct net_device *dev) |
| { |
| struct mlx4_en_priv *priv = netdev_priv(dev); |
| int eff_mtu = MLX4_EN_EFF_MTU(dev->mtu); |
| int i = 0; |
| |
| /* bpf requires buffers to be set up as 1 packet per page. |
| * This only works when num_frags == 1. |
| */ |
| if (priv->tx_ring_num[TX_XDP]) { |
| priv->frag_info[0].frag_size = eff_mtu; |
| /* This will gain efficient xdp frame recycling at the |
| * expense of more costly truesize accounting |
| */ |
| priv->frag_info[0].frag_stride = PAGE_SIZE; |
| priv->dma_dir = PCI_DMA_BIDIRECTIONAL; |
| priv->rx_headroom = XDP_PACKET_HEADROOM; |
| i = 1; |
| } else { |
| int frag_size_max = 2048, buf_size = 0; |
| |
| /* should not happen, right ? */ |
| if (eff_mtu > PAGE_SIZE + (MLX4_EN_MAX_RX_FRAGS - 1) * 2048) |
| frag_size_max = PAGE_SIZE; |
| |
| while (buf_size < eff_mtu) { |
| int frag_stride, frag_size = eff_mtu - buf_size; |
| int pad, nb; |
| |
| if (i < MLX4_EN_MAX_RX_FRAGS - 1) |
| frag_size = min(frag_size, frag_size_max); |
| |
| priv->frag_info[i].frag_size = frag_size; |
| frag_stride = ALIGN(frag_size, SMP_CACHE_BYTES); |
| /* We can only pack 2 1536-bytes frames in on 4K page |
| * Therefore, each frame would consume more bytes (truesize) |
| */ |
| nb = PAGE_SIZE / frag_stride; |
| pad = (PAGE_SIZE - nb * frag_stride) / nb; |
| pad &= ~(SMP_CACHE_BYTES - 1); |
| priv->frag_info[i].frag_stride = frag_stride + pad; |
| |
| buf_size += frag_size; |
| i++; |
| } |
| priv->dma_dir = PCI_DMA_FROMDEVICE; |
| priv->rx_headroom = 0; |
| } |
| |
| priv->num_frags = i; |
| priv->rx_skb_size = eff_mtu; |
| priv->log_rx_info = ROUNDUP_LOG2(i * sizeof(struct mlx4_en_rx_alloc)); |
| |
| en_dbg(DRV, priv, "Rx buffer scatter-list (effective-mtu:%d num_frags:%d):\n", |
| eff_mtu, priv->num_frags); |
| for (i = 0; i < priv->num_frags; i++) { |
| en_dbg(DRV, |
| priv, |
| " frag:%d - size:%d stride:%d\n", |
| i, |
| priv->frag_info[i].frag_size, |
| priv->frag_info[i].frag_stride); |
| } |
| } |
| |
| /* RSS related functions */ |
| |
| static int mlx4_en_config_rss_qp(struct mlx4_en_priv *priv, int qpn, |
| struct mlx4_en_rx_ring *ring, |
| enum mlx4_qp_state *state, |
| struct mlx4_qp *qp) |
| { |
| struct mlx4_en_dev *mdev = priv->mdev; |
| struct mlx4_qp_context *context; |
| int err = 0; |
| |
| context = kmalloc(sizeof(*context), GFP_KERNEL); |
| if (!context) |
| return -ENOMEM; |
| |
| err = mlx4_qp_alloc(mdev->dev, qpn, qp, GFP_KERNEL); |
| if (err) { |
| en_err(priv, "Failed to allocate qp #%x\n", qpn); |
| goto out; |
| } |
| qp->event = mlx4_en_sqp_event; |
| |
| memset(context, 0, sizeof *context); |
| mlx4_en_fill_qp_context(priv, ring->actual_size, ring->stride, 0, 0, |
| qpn, ring->cqn, -1, context); |
| context->db_rec_addr = cpu_to_be64(ring->wqres.db.dma); |
| |
| /* Cancel FCS removal if FW allows */ |
| if (mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP) { |
| context->param3 |= cpu_to_be32(1 << 29); |
| if (priv->dev->features & NETIF_F_RXFCS) |
| ring->fcs_del = 0; |
| else |
| ring->fcs_del = ETH_FCS_LEN; |
| } else |
| ring->fcs_del = 0; |
| |
| err = mlx4_qp_to_ready(mdev->dev, &ring->wqres.mtt, context, qp, state); |
| if (err) { |
| mlx4_qp_remove(mdev->dev, qp); |
| mlx4_qp_free(mdev->dev, qp); |
| } |
| mlx4_en_update_rx_prod_db(ring); |
| out: |
| kfree(context); |
| return err; |
| } |
| |
| int mlx4_en_create_drop_qp(struct mlx4_en_priv *priv) |
| { |
| int err; |
| u32 qpn; |
| |
| err = mlx4_qp_reserve_range(priv->mdev->dev, 1, 1, &qpn, |
| MLX4_RESERVE_A0_QP); |
| if (err) { |
| en_err(priv, "Failed reserving drop qpn\n"); |
| return err; |
| } |
| err = mlx4_qp_alloc(priv->mdev->dev, qpn, &priv->drop_qp, GFP_KERNEL); |
| if (err) { |
| en_err(priv, "Failed allocating drop qp\n"); |
| mlx4_qp_release_range(priv->mdev->dev, qpn, 1); |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| void mlx4_en_destroy_drop_qp(struct mlx4_en_priv *priv) |
| { |
| u32 qpn; |
| |
| qpn = priv->drop_qp.qpn; |
| mlx4_qp_remove(priv->mdev->dev, &priv->drop_qp); |
| mlx4_qp_free(priv->mdev->dev, &priv->drop_qp); |
| mlx4_qp_release_range(priv->mdev->dev, qpn, 1); |
| } |
| |
| /* Allocate rx qp's and configure them according to rss map */ |
| int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv) |
| { |
| struct mlx4_en_dev *mdev = priv->mdev; |
| struct mlx4_en_rss_map *rss_map = &priv->rss_map; |
| struct mlx4_qp_context context; |
| struct mlx4_rss_context *rss_context; |
| int rss_rings; |
| void *ptr; |
| u8 rss_mask = (MLX4_RSS_IPV4 | MLX4_RSS_TCP_IPV4 | MLX4_RSS_IPV6 | |
| MLX4_RSS_TCP_IPV6); |
| int i, qpn; |
| int err = 0; |
| int good_qps = 0; |
| u8 flags; |
| |
| en_dbg(DRV, priv, "Configuring rss steering\n"); |
| |
| flags = priv->rx_ring_num == 1 ? MLX4_RESERVE_A0_QP : 0; |
| err = mlx4_qp_reserve_range(mdev->dev, priv->rx_ring_num, |
| priv->rx_ring_num, |
| &rss_map->base_qpn, flags); |
| if (err) { |
| en_err(priv, "Failed reserving %d qps\n", priv->rx_ring_num); |
| return err; |
| } |
| |
| for (i = 0; i < priv->rx_ring_num; i++) { |
| qpn = rss_map->base_qpn + i; |
| err = mlx4_en_config_rss_qp(priv, qpn, priv->rx_ring[i], |
| &rss_map->state[i], |
| &rss_map->qps[i]); |
| if (err) |
| goto rss_err; |
| |
| ++good_qps; |
| } |
| |
| if (priv->rx_ring_num == 1) { |
| rss_map->indir_qp = &rss_map->qps[0]; |
| priv->base_qpn = rss_map->indir_qp->qpn; |
| en_info(priv, "Optimized Non-RSS steering\n"); |
| return 0; |
| } |
| |
| rss_map->indir_qp = kzalloc(sizeof(*rss_map->indir_qp), GFP_KERNEL); |
| if (!rss_map->indir_qp) { |
| err = -ENOMEM; |
| goto rss_err; |
| } |
| |
| /* Configure RSS indirection qp */ |
| err = mlx4_qp_alloc(mdev->dev, priv->base_qpn, rss_map->indir_qp, |
| GFP_KERNEL); |
| if (err) { |
| en_err(priv, "Failed to allocate RSS indirection QP\n"); |
| goto rss_err; |
| } |
| |
| rss_map->indir_qp->event = mlx4_en_sqp_event; |
| mlx4_en_fill_qp_context(priv, 0, 0, 0, 1, priv->base_qpn, |
| priv->rx_ring[0]->cqn, -1, &context); |
| |
| if (!priv->prof->rss_rings || priv->prof->rss_rings > priv->rx_ring_num) |
| rss_rings = priv->rx_ring_num; |
| else |
| rss_rings = priv->prof->rss_rings; |
| |
| ptr = ((void *) &context) + offsetof(struct mlx4_qp_context, pri_path) |
| + MLX4_RSS_OFFSET_IN_QPC_PRI_PATH; |
| rss_context = ptr; |
| rss_context->base_qpn = cpu_to_be32(ilog2(rss_rings) << 24 | |
| (rss_map->base_qpn)); |
| rss_context->default_qpn = cpu_to_be32(rss_map->base_qpn); |
| if (priv->mdev->profile.udp_rss) { |
| rss_mask |= MLX4_RSS_UDP_IPV4 | MLX4_RSS_UDP_IPV6; |
| rss_context->base_qpn_udp = rss_context->default_qpn; |
| } |
| |
| if (mdev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) { |
| en_info(priv, "Setting RSS context tunnel type to RSS on inner headers\n"); |
| rss_mask |= MLX4_RSS_BY_INNER_HEADERS; |
| } |
| |
| rss_context->flags = rss_mask; |
| rss_context->hash_fn = MLX4_RSS_HASH_TOP; |
| if (priv->rss_hash_fn == ETH_RSS_HASH_XOR) { |
| rss_context->hash_fn = MLX4_RSS_HASH_XOR; |
| } else if (priv->rss_hash_fn == ETH_RSS_HASH_TOP) { |
| rss_context->hash_fn = MLX4_RSS_HASH_TOP; |
| memcpy(rss_context->rss_key, priv->rss_key, |
| MLX4_EN_RSS_KEY_SIZE); |
| } else { |
| en_err(priv, "Unknown RSS hash function requested\n"); |
| err = -EINVAL; |
| goto indir_err; |
| } |
| |
| err = mlx4_qp_to_ready(mdev->dev, &priv->res.mtt, &context, |
| rss_map->indir_qp, &rss_map->indir_state); |
| if (err) |
| goto indir_err; |
| |
| return 0; |
| |
| indir_err: |
| mlx4_qp_modify(mdev->dev, NULL, rss_map->indir_state, |
| MLX4_QP_STATE_RST, NULL, 0, 0, rss_map->indir_qp); |
| mlx4_qp_remove(mdev->dev, rss_map->indir_qp); |
| mlx4_qp_free(mdev->dev, rss_map->indir_qp); |
| kfree(rss_map->indir_qp); |
| rss_map->indir_qp = NULL; |
| rss_err: |
| for (i = 0; i < good_qps; i++) { |
| mlx4_qp_modify(mdev->dev, NULL, rss_map->state[i], |
| MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->qps[i]); |
| mlx4_qp_remove(mdev->dev, &rss_map->qps[i]); |
| mlx4_qp_free(mdev->dev, &rss_map->qps[i]); |
| } |
| mlx4_qp_release_range(mdev->dev, rss_map->base_qpn, priv->rx_ring_num); |
| return err; |
| } |
| |
| void mlx4_en_release_rss_steer(struct mlx4_en_priv *priv) |
| { |
| struct mlx4_en_dev *mdev = priv->mdev; |
| struct mlx4_en_rss_map *rss_map = &priv->rss_map; |
| int i; |
| |
| if (priv->rx_ring_num > 1) { |
| mlx4_qp_modify(mdev->dev, NULL, rss_map->indir_state, |
| MLX4_QP_STATE_RST, NULL, 0, 0, |
| rss_map->indir_qp); |
| mlx4_qp_remove(mdev->dev, rss_map->indir_qp); |
| mlx4_qp_free(mdev->dev, rss_map->indir_qp); |
| kfree(rss_map->indir_qp); |
| rss_map->indir_qp = NULL; |
| } |
| |
| for (i = 0; i < priv->rx_ring_num; i++) { |
| mlx4_qp_modify(mdev->dev, NULL, rss_map->state[i], |
| MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->qps[i]); |
| mlx4_qp_remove(mdev->dev, &rss_map->qps[i]); |
| mlx4_qp_free(mdev->dev, &rss_map->qps[i]); |
| } |
| mlx4_qp_release_range(mdev->dev, rss_map->base_qpn, priv->rx_ring_num); |
| } |