mirror of https://gitee.com/openkylin/linux.git
Merge branch 'fixes-for-ena-driver'
Shay Agroskin says: ==================== Fixes for ENA driver - fix wrong data offset on machines that support rx offset - work-around Intel iommu issue - fix out of bound access when request id is wrong ==================== Link: https://lore.kernel.org/r/20201123190859.21298-1-shayagr@amazon.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski
commit
5fc145f155
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@ -516,6 +516,7 @@ int ena_com_rx_pkt(struct ena_com_io_cq *io_cq,
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{
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struct ena_com_rx_buf_info *ena_buf = &ena_rx_ctx->ena_bufs[0];
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struct ena_eth_io_rx_cdesc_base *cdesc = NULL;
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u16 q_depth = io_cq->q_depth;
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u16 cdesc_idx = 0;
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u16 nb_hw_desc;
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u16 i = 0;
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@ -543,6 +544,8 @@ int ena_com_rx_pkt(struct ena_com_io_cq *io_cq,
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do {
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ena_buf[i].len = cdesc->length;
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ena_buf[i].req_id = cdesc->req_id;
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if (unlikely(ena_buf[i].req_id >= q_depth))
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return -EIO;
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if (++i >= nb_hw_desc)
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break;
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@ -789,24 +789,6 @@ static void ena_free_all_io_tx_resources(struct ena_adapter *adapter)
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adapter->num_io_queues);
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}
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static int validate_rx_req_id(struct ena_ring *rx_ring, u16 req_id)
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{
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if (likely(req_id < rx_ring->ring_size))
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return 0;
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netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
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"Invalid rx req_id: %hu\n", req_id);
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u64_stats_update_begin(&rx_ring->syncp);
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rx_ring->rx_stats.bad_req_id++;
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u64_stats_update_end(&rx_ring->syncp);
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/* Trigger device reset */
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rx_ring->adapter->reset_reason = ENA_REGS_RESET_INV_RX_REQ_ID;
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set_bit(ENA_FLAG_TRIGGER_RESET, &rx_ring->adapter->flags);
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return -EFAULT;
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}
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/* ena_setup_rx_resources - allocate I/O Rx resources (Descriptors)
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* @adapter: network interface device structure
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* @qid: queue index
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@ -926,10 +908,14 @@ static void ena_free_all_io_rx_resources(struct ena_adapter *adapter)
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static int ena_alloc_rx_page(struct ena_ring *rx_ring,
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struct ena_rx_buffer *rx_info, gfp_t gfp)
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{
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int headroom = rx_ring->rx_headroom;
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struct ena_com_buf *ena_buf;
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struct page *page;
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dma_addr_t dma;
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/* restore page offset value in case it has been changed by device */
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rx_info->page_offset = headroom;
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/* if previous allocated page is not used */
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if (unlikely(rx_info->page))
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return 0;
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@ -959,10 +945,9 @@ static int ena_alloc_rx_page(struct ena_ring *rx_ring,
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"Allocate page %p, rx_info %p\n", page, rx_info);
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rx_info->page = page;
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rx_info->page_offset = 0;
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ena_buf = &rx_info->ena_buf;
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ena_buf->paddr = dma + rx_ring->rx_headroom;
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ena_buf->len = ENA_PAGE_SIZE - rx_ring->rx_headroom;
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ena_buf->paddr = dma + headroom;
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ena_buf->len = ENA_PAGE_SIZE - headroom;
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return 0;
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}
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@ -1356,15 +1341,10 @@ static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
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struct ena_rx_buffer *rx_info;
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u16 len, req_id, buf = 0;
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void *va;
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int rc;
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len = ena_bufs[buf].len;
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req_id = ena_bufs[buf].req_id;
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rc = validate_rx_req_id(rx_ring, req_id);
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if (unlikely(rc < 0))
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return NULL;
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rx_info = &rx_ring->rx_buffer_info[req_id];
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if (unlikely(!rx_info->page)) {
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@ -1379,7 +1359,8 @@ static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
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/* save virt address of first buffer */
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va = page_address(rx_info->page) + rx_info->page_offset;
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prefetch(va + NET_IP_ALIGN);
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prefetch(va);
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if (len <= rx_ring->rx_copybreak) {
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skb = ena_alloc_skb(rx_ring, false);
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@ -1420,8 +1401,6 @@ static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
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skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_info->page,
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rx_info->page_offset, len, ENA_PAGE_SIZE);
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/* The offset is non zero only for the first buffer */
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rx_info->page_offset = 0;
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netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
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"RX skb updated. len %d. data_len %d\n",
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@ -1440,10 +1419,6 @@ static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
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len = ena_bufs[buf].len;
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req_id = ena_bufs[buf].req_id;
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rc = validate_rx_req_id(rx_ring, req_id);
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if (unlikely(rc < 0))
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return NULL;
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rx_info = &rx_ring->rx_buffer_info[req_id];
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} while (1);
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@ -1544,8 +1519,7 @@ static int ena_xdp_handle_buff(struct ena_ring *rx_ring, struct xdp_buff *xdp)
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int ret;
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rx_info = &rx_ring->rx_buffer_info[rx_ring->ena_bufs[0].req_id];
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xdp->data = page_address(rx_info->page) +
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rx_info->page_offset + rx_ring->rx_headroom;
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xdp->data = page_address(rx_info->page) + rx_info->page_offset;
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xdp_set_data_meta_invalid(xdp);
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xdp->data_hard_start = page_address(rx_info->page);
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xdp->data_end = xdp->data + rx_ring->ena_bufs[0].len;
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@ -1612,8 +1586,9 @@ static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
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if (unlikely(ena_rx_ctx.descs == 0))
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break;
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/* First descriptor might have an offset set by the device */
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rx_info = &rx_ring->rx_buffer_info[rx_ring->ena_bufs[0].req_id];
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rx_info->page_offset = ena_rx_ctx.pkt_offset;
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rx_info->page_offset += ena_rx_ctx.pkt_offset;
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netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
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"rx_poll: q %d got packet from ena. descs #: %d l3 proto %d l4 proto %d hash: %x\n",
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@ -1697,12 +1672,18 @@ static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
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error:
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adapter = netdev_priv(rx_ring->netdev);
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u64_stats_update_begin(&rx_ring->syncp);
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rx_ring->rx_stats.bad_desc_num++;
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u64_stats_update_end(&rx_ring->syncp);
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if (rc == -ENOSPC) {
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u64_stats_update_begin(&rx_ring->syncp);
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rx_ring->rx_stats.bad_desc_num++;
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u64_stats_update_end(&rx_ring->syncp);
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adapter->reset_reason = ENA_REGS_RESET_TOO_MANY_RX_DESCS;
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} else {
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u64_stats_update_begin(&rx_ring->syncp);
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rx_ring->rx_stats.bad_req_id++;
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u64_stats_update_end(&rx_ring->syncp);
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adapter->reset_reason = ENA_REGS_RESET_INV_RX_REQ_ID;
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}
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/* Too many desc from the device. Trigger reset */
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adapter->reset_reason = ENA_REGS_RESET_TOO_MANY_RX_DESCS;
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set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
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return 0;
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@ -3388,16 +3369,9 @@ static int ena_device_init(struct ena_com_dev *ena_dev, struct pci_dev *pdev,
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goto err_mmio_read_less;
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}
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rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(dma_width));
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rc = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(dma_width));
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if (rc) {
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dev_err(dev, "pci_set_dma_mask failed 0x%x\n", rc);
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goto err_mmio_read_less;
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}
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rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(dma_width));
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if (rc) {
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dev_err(dev, "err_pci_set_consistent_dma_mask failed 0x%x\n",
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rc);
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dev_err(dev, "dma_set_mask_and_coherent failed %d\n", rc);
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goto err_mmio_read_less;
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}
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@ -4167,6 +4141,12 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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return rc;
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}
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rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(ENA_MAX_PHYS_ADDR_SIZE_BITS));
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if (rc) {
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dev_err(&pdev->dev, "dma_set_mask_and_coherent failed %d\n", rc);
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goto err_disable_device;
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}
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pci_set_master(pdev);
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ena_dev = vzalloc(sizeof(*ena_dev));
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