net: ena: add functions for handling Low Latency Queues in ena_netdev (38005ca8) · Commits · 戴 / test

drivers/net/ethernet/amazon/ena/ena_ethtool.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -81,6 +81,7 @@ static const struct ena_stats ena_stats_tx_strings[] = {
		ENA_STAT_TX_ENTRY(doorbells),
		ENA_STAT_TX_ENTRY(prepare_ctx_err),
		ENA_STAT_TX_ENTRY(bad_req_id),
		ENA_STAT_TX_ENTRY(llq_buffer_copy),
		ENA_STAT_TX_ENTRY(missed_tx),
		};

drivers/net/ethernet/amazon/ena/ena_netdev.c

+244 −143

Original line number	Diff line number	Diff line
		@@ -237,6 +237,17 @@ static int ena_setup_tx_resources(struct ena_adapter *adapter, int qid)
		}
		}

		size = tx_ring->tx_max_header_size;
		tx_ring->push_buf_intermediate_buf = vzalloc_node(size, node);
		if (!tx_ring->push_buf_intermediate_buf) {
		tx_ring->push_buf_intermediate_buf = vzalloc(size);
		if (!tx_ring->push_buf_intermediate_buf) {
		vfree(tx_ring->tx_buffer_info);
		vfree(tx_ring->free_tx_ids);
		return -ENOMEM;
		}
		}

		/* Req id ring for TX out of order completions */
		for (i = 0; i < tx_ring->ring_size; i++)
		tx_ring->free_tx_ids[i] = i;
		@@ -265,6 +276,9 @@ static void ena_free_tx_resources(struct ena_adapter *adapter, int qid)

		vfree(tx_ring->free_tx_ids);
		tx_ring->free_tx_ids = NULL;

		vfree(tx_ring->push_buf_intermediate_buf);
		tx_ring->push_buf_intermediate_buf = NULL;
		}

		/* ena_setup_all_tx_resources - allocate I/O Tx queues resources for All queues
		@@ -602,6 +616,36 @@ static void ena_free_all_rx_bufs(struct ena_adapter *adapter)
		ena_free_rx_bufs(adapter, i);
		}

		static inline void ena_unmap_tx_skb(struct ena_ring *tx_ring,
		struct ena_tx_buffer *tx_info)
		{
		struct ena_com_buf *ena_buf;
		u32 cnt;
		int i;

		ena_buf = tx_info->bufs;
		cnt = tx_info->num_of_bufs;

		if (unlikely(!cnt))
		return;

		if (tx_info->map_linear_data) {
		dma_unmap_single(tx_ring->dev,
		dma_unmap_addr(ena_buf, paddr),
		dma_unmap_len(ena_buf, len),
		DMA_TO_DEVICE);
		ena_buf++;
		cnt--;
		}

		/* unmap remaining mapped pages */
		for (i = 0; i < cnt; i++) {
		dma_unmap_page(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
		dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
		ena_buf++;
		}
		}

		/* ena_free_tx_bufs - Free Tx Buffers per Queue
		* @tx_ring: TX ring for which buffers be freed
		*/
		@@ -612,9 +656,6 @@ static void ena_free_tx_bufs(struct ena_ring *tx_ring)

		for (i = 0; i < tx_ring->ring_size; i++) {
		struct ena_tx_buffer *tx_info = &tx_ring->tx_buffer_info[i];
		struct ena_com_buf *ena_buf;
		int nr_frags;
		int j;

		if (!tx_info->skb)
		continue;
		@@ -630,21 +671,7 @@ static void ena_free_tx_bufs(struct ena_ring *tx_ring)
		tx_ring->qid, i);
		}

		ena_buf = tx_info->bufs;
		dma_unmap_single(tx_ring->dev,
		ena_buf->paddr,
		ena_buf->len,
		DMA_TO_DEVICE);

		/* unmap remaining mapped pages */
		nr_frags = tx_info->num_of_bufs - 1;
		for (j = 0; j < nr_frags; j++) {
		ena_buf++;
		dma_unmap_page(tx_ring->dev,
		ena_buf->paddr,
		ena_buf->len,
		DMA_TO_DEVICE);
		}
		ena_unmap_tx_skb(tx_ring, tx_info);

		dev_kfree_skb_any(tx_info->skb);
		}
		@@ -735,8 +762,6 @@ static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget)
		while (tx_pkts < budget) {
		struct ena_tx_buffer *tx_info;
		struct sk_buff *skb;
		struct ena_com_buf *ena_buf;
		int i, nr_frags;

		rc = ena_com_tx_comp_req_id_get(tx_ring->ena_com_io_cq,
		&req_id);
		@@ -756,24 +781,7 @@ static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget)
		tx_info->skb = NULL;
		tx_info->last_jiffies = 0;

		if (likely(tx_info->num_of_bufs != 0)) {
		ena_buf = tx_info->bufs;

		dma_unmap_single(tx_ring->dev,
		dma_unmap_addr(ena_buf, paddr),
		dma_unmap_len(ena_buf, len),
		DMA_TO_DEVICE);

		/* unmap remaining mapped pages */
		nr_frags = tx_info->num_of_bufs - 1;
		for (i = 0; i < nr_frags; i++) {
		ena_buf++;
		dma_unmap_page(tx_ring->dev,
		dma_unmap_addr(ena_buf, paddr),
		dma_unmap_len(ena_buf, len),
		DMA_TO_DEVICE);
		}
		}
		ena_unmap_tx_skb(tx_ring, tx_info);

		netif_dbg(tx_ring->adapter, tx_done, tx_ring->netdev,
		"tx_poll: q %d skb %p completed\n", tx_ring->qid,
		@@ -1300,7 +1308,6 @@ static int ena_enable_msix(struct ena_adapter *adapter, int num_queues)

		/* Reserved the max msix vectors we might need */
		msix_vecs = ENA_MAX_MSIX_VEC(num_queues);

		netif_dbg(adapter, probe, adapter->netdev,
		"trying to enable MSI-X, vectors %d\n", msix_vecs);

		@@ -1593,7 +1600,7 @@ static int ena_up_complete(struct ena_adapter *adapter)

		static int ena_create_io_tx_queue(struct ena_adapter *adapter, int qid)
		{
		struct ena_com_create_io_ctx ctx = { 0 };
		struct ena_com_create_io_ctx ctx;
		struct ena_com_dev *ena_dev;
		struct ena_ring *tx_ring;
		u32 msix_vector;
		@@ -1606,6 +1613,8 @@ static int ena_create_io_tx_queue(struct ena_adapter *adapter, int qid)
		msix_vector = ENA_IO_IRQ_IDX(qid);
		ena_qid = ENA_IO_TXQ_IDX(qid);

		memset(&ctx, 0x0, sizeof(ctx));

		ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_TX;
		ctx.qid = ena_qid;
		ctx.mem_queue_type = ena_dev->tx_mem_queue_type;
		@@ -1659,7 +1668,7 @@ create_err:
		static int ena_create_io_rx_queue(struct ena_adapter *adapter, int qid)
		{
		struct ena_com_dev *ena_dev;
		struct ena_com_create_io_ctx ctx = { 0 };
		struct ena_com_create_io_ctx ctx;
		struct ena_ring *rx_ring;
		u32 msix_vector;
		u16 ena_qid;
		@@ -1671,6 +1680,8 @@ static int ena_create_io_rx_queue(struct ena_adapter *adapter, int qid)
		msix_vector = ENA_IO_IRQ_IDX(qid);
		ena_qid = ENA_IO_RXQ_IDX(qid);

		memset(&ctx, 0x0, sizeof(ctx));

		ctx.qid = ena_qid;
		ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_RX;
		ctx.mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
		@@ -1981,73 +1992,70 @@ static int ena_check_and_linearize_skb(struct ena_ring *tx_ring,
		return rc;
		}

		/* Called with netif_tx_lock. */
		static netdev_tx_t ena_start_xmit(struct sk_buff skb, struct net_device dev)
		static int ena_tx_map_skb(struct ena_ring *tx_ring,
		struct ena_tx_buffer *tx_info,
		struct sk_buff *skb,
		void **push_hdr,
		u16 *header_len)
		{
		struct ena_adapter *adapter = netdev_priv(dev);
		struct ena_tx_buffer *tx_info;
		struct ena_com_tx_ctx ena_tx_ctx;
		struct ena_ring *tx_ring;
		struct netdev_queue *txq;
		struct ena_adapter *adapter = tx_ring->adapter;
		struct ena_com_buf *ena_buf;
		void *push_hdr;
		u32 len, last_frag;
		u16 next_to_use;
		u16 req_id;
		u16 push_len;
		u16 header_len;
		dma_addr_t dma;
		int qid, rc, nb_hw_desc;
		int i = -1;
		u32 skb_head_len, frag_len, last_frag;
		u16 push_len = 0;
		u16 delta = 0;
		int i = 0;

		netif_dbg(adapter, tx_queued, dev, "%s skb %p\n", __func__, skb);
		/* Determine which tx ring we will be placed on */
		qid = skb_get_queue_mapping(skb);
		tx_ring = &adapter->tx_ring[qid];
		txq = netdev_get_tx_queue(dev, qid);

		rc = ena_check_and_linearize_skb(tx_ring, skb);
		if (unlikely(rc))
		goto error_drop_packet;

		skb_tx_timestamp(skb);
		len = skb_headlen(skb);

		next_to_use = tx_ring->next_to_use;
		req_id = tx_ring->free_tx_ids[next_to_use];
		tx_info = &tx_ring->tx_buffer_info[req_id];
		tx_info->num_of_bufs = 0;

		WARN(tx_info->skb, "SKB isn't NULL req_id %d\n", req_id);
		ena_buf = tx_info->bufs;
		skb_head_len = skb_headlen(skb);
		tx_info->skb = skb;
		ena_buf = tx_info->bufs;

		if (tx_ring->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
		/* prepared the push buffer */
		push_len = min_t(u32, len, tx_ring->tx_max_header_size);
		header_len = push_len;
		push_hdr = skb->data;
		/* When the device is LLQ mode, the driver will copy
		* the header into the device memory space.
		* the ena_com layer assume the header is in a linear
		* memory space.
		* This assumption might be wrong since part of the header
		* can be in the fragmented buffers.
		* Use skb_header_pointer to make sure the header is in a
		* linear memory space.
		*/

		push_len = min_t(u32, skb->len, tx_ring->tx_max_header_size);
		*push_hdr = skb_header_pointer(skb, 0, push_len,
		tx_ring->push_buf_intermediate_buf);
		*header_len = push_len;
		if (unlikely(skb->data != *push_hdr)) {
		u64_stats_update_begin(&tx_ring->syncp);
		tx_ring->tx_stats.llq_buffer_copy++;
		u64_stats_update_end(&tx_ring->syncp);

		delta = push_len - skb_head_len;
		}
		} else {
		push_len = 0;
		header_len = min_t(u32, len, tx_ring->tx_max_header_size);
		push_hdr = NULL;
		*push_hdr = NULL;
		*header_len = min_t(u32, skb_head_len,
		tx_ring->tx_max_header_size);
		}

		netif_dbg(adapter, tx_queued, dev,
		netif_dbg(adapter, tx_queued, adapter->netdev,
		"skb: %p header_buf->vaddr: %p push_len: %d\n", skb,
		push_hdr, push_len);
		*push_hdr, push_len);

		if (len > push_len) {
		if (skb_head_len > push_len) {
		dma = dma_map_single(tx_ring->dev, skb->data + push_len,
		len - push_len, DMA_TO_DEVICE);
		if (dma_mapping_error(tx_ring->dev, dma))
		skb_head_len - push_len, DMA_TO_DEVICE);
		if (unlikely(dma_mapping_error(tx_ring->dev, dma)))
		goto error_report_dma_error;

		ena_buf->paddr = dma;
		ena_buf->len = len - push_len;
		ena_buf->len = skb_head_len - push_len;

		ena_buf++;
		tx_info->num_of_bufs++;
		tx_info->map_linear_data = 1;
		} else {
		tx_info->map_linear_data = 0;
		}

		last_frag = skb_shinfo(skb)->nr_frags;
		@@ -2055,18 +2063,75 @@ static netdev_tx_t ena_start_xmit(struct sk_buff skb, struct net_device dev)
		for (i = 0; i < last_frag; i++) {
		const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];

		len = skb_frag_size(frag);
		dma = skb_frag_dma_map(tx_ring->dev, frag, 0, len,
		DMA_TO_DEVICE);
		if (dma_mapping_error(tx_ring->dev, dma))
		frag_len = skb_frag_size(frag);

		if (unlikely(delta >= frag_len)) {
		delta -= frag_len;
		continue;
		}

		dma = skb_frag_dma_map(tx_ring->dev, frag, delta,
		frag_len - delta, DMA_TO_DEVICE);
		if (unlikely(dma_mapping_error(tx_ring->dev, dma)))
		goto error_report_dma_error;

		ena_buf->paddr = dma;
		ena_buf->len = len;
		ena_buf->len = frag_len - delta;
		ena_buf++;
		tx_info->num_of_bufs++;
		delta = 0;
		}

		tx_info->num_of_bufs += last_frag;
		return 0;

		error_report_dma_error:
		u64_stats_update_begin(&tx_ring->syncp);
		tx_ring->tx_stats.dma_mapping_err++;
		u64_stats_update_end(&tx_ring->syncp);
		netdev_warn(adapter->netdev, "failed to map skb\n");

		tx_info->skb = NULL;

		tx_info->num_of_bufs += i;
		ena_unmap_tx_skb(tx_ring, tx_info);

		return -EINVAL;
		}

		/* Called with netif_tx_lock. */
		static netdev_tx_t ena_start_xmit(struct sk_buff skb, struct net_device dev)
		{
		struct ena_adapter *adapter = netdev_priv(dev);
		struct ena_tx_buffer *tx_info;
		struct ena_com_tx_ctx ena_tx_ctx;
		struct ena_ring *tx_ring;
		struct netdev_queue *txq;
		void *push_hdr;
		u16 next_to_use, req_id, header_len;
		int qid, rc, nb_hw_desc;

		netif_dbg(adapter, tx_queued, dev, "%s skb %p\n", __func__, skb);
		/* Determine which tx ring we will be placed on */
		qid = skb_get_queue_mapping(skb);
		tx_ring = &adapter->tx_ring[qid];
		txq = netdev_get_tx_queue(dev, qid);

		rc = ena_check_and_linearize_skb(tx_ring, skb);
		if (unlikely(rc))
		goto error_drop_packet;

		skb_tx_timestamp(skb);

		next_to_use = tx_ring->next_to_use;
		req_id = tx_ring->free_tx_ids[next_to_use];
		tx_info = &tx_ring->tx_buffer_info[req_id];
		tx_info->num_of_bufs = 0;

		WARN(tx_info->skb, "SKB isn't NULL req_id %d\n", req_id);

		rc = ena_tx_map_skb(tx_ring, tx_info, skb, &push_hdr, &header_len);
		if (unlikely(rc))
		goto error_drop_packet;

		memset(&ena_tx_ctx, 0x0, sizeof(struct ena_com_tx_ctx));
		ena_tx_ctx.ena_bufs = tx_info->bufs;
		@@ -2082,14 +2147,22 @@ static netdev_tx_t ena_start_xmit(struct sk_buff skb, struct net_device dev)
		rc = ena_com_prepare_tx(tx_ring->ena_com_io_sq, &ena_tx_ctx,
		&nb_hw_desc);

		/* ena_com_prepare_tx() can't fail due to overflow of tx queue,
		* since the number of free descriptors in the queue is checked
		* after sending the previous packet. In case there isn't enough
		* space in the queue for the next packet, it is stopped
		* until there is again enough available space in the queue.
		* All other failure reasons of ena_com_prepare_tx() are fatal
		* and therefore require a device reset.
		*/
		if (unlikely(rc)) {
		netif_err(adapter, tx_queued, dev,
		"failed to prepare tx bufs\n");
		u64_stats_update_begin(&tx_ring->syncp);
		tx_ring->tx_stats.queue_stop++;
		tx_ring->tx_stats.prepare_ctx_err++;
		u64_stats_update_end(&tx_ring->syncp);
		netif_tx_stop_queue(txq);
		adapter->reset_reason = ENA_REGS_RESET_DRIVER_INVALID_STATE;
		set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
		goto error_unmap_dma;
		}

		@@ -2152,35 +2225,11 @@ static netdev_tx_t ena_start_xmit(struct sk_buff skb, struct net_device dev)

		return NETDEV_TX_OK;

		error_report_dma_error:
		u64_stats_update_begin(&tx_ring->syncp);
		tx_ring->tx_stats.dma_mapping_err++;
		u64_stats_update_end(&tx_ring->syncp);
		netdev_warn(adapter->netdev, "failed to map skb\n");

		tx_info->skb = NULL;

		error_unmap_dma:
		if (i >= 0) {
		/* save value of frag that failed */
		last_frag = i;

		/* start back at beginning and unmap skb */
		ena_unmap_tx_skb(tx_ring, tx_info);
		tx_info->skb = NULL;
		ena_buf = tx_info->bufs;
		dma_unmap_single(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
		dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);

		/* unmap remaining mapped pages */
		for (i = 0; i < last_frag; i++) {
		ena_buf++;
		dma_unmap_page(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
		dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
		}
		}

		error_drop_packet:

		dev_kfree_skb(skb);
		return NETDEV_TX_OK;
		}
		@@ -2616,7 +2665,9 @@ static int ena_restore_device(struct ena_adapter *adapter)

		set_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
		mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
		dev_err(&pdev->dev, "Device reset completed successfully\n");
		dev_err(&pdev->dev,
		"Device reset completed successfully, Driver info: %s\n",
		version);

		return rc;
		err_disable_msix:
		@@ -2979,18 +3030,52 @@ static int ena_calc_io_queue_num(struct pci_dev *pdev,
		return io_queue_num;
		}

		static void ena_set_push_mode(struct pci_dev pdev, struct ena_com_dev ena_dev,
		struct ena_com_dev_get_features_ctx *get_feat_ctx)
		static int ena_set_queues_placement_policy(struct pci_dev *pdev,
		struct ena_com_dev *ena_dev,
		struct ena_admin_feature_llq_desc *llq,
		struct ena_llq_configurations *llq_default_configurations)
		{
		bool has_mem_bar;
		int rc;
		u32 llq_feature_mask;

		llq_feature_mask = 1 << ENA_ADMIN_LLQ;
		if (!(ena_dev->supported_features & llq_feature_mask)) {
		dev_err(&pdev->dev,
		"LLQ is not supported Fallback to host mode policy.\n");
		ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
		return 0;
		}

		has_mem_bar = pci_select_bars(pdev, IORESOURCE_MEM) & BIT(ENA_MEM_BAR);

		/* Enable push mode if device supports LLQ */
		if (has_mem_bar && get_feat_ctx->max_queues.max_legacy_llq_num > 0)
		ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV;
		else
		rc = ena_com_config_dev_mode(ena_dev, llq, llq_default_configurations);
		if (unlikely(rc)) {
		dev_err(&pdev->dev,
		"Failed to configure the device mode. Fallback to host mode policy.\n");
		ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
		return 0;
		}

		/* Nothing to config, exit */
		if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
		return 0;

		if (!has_mem_bar) {
		dev_err(&pdev->dev,
		"ENA device does not expose LLQ bar. Fallback to host mode policy.\n");
		ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
		return 0;
		}

		ena_dev->mem_bar = devm_ioremap_wc(&pdev->dev,
		pci_resource_start(pdev, ENA_MEM_BAR),
		pci_resource_len(pdev, ENA_MEM_BAR));

		if (!ena_dev->mem_bar)
		return -EFAULT;

		return 0;
		}

		static void ena_set_dev_offloads(struct ena_com_dev_get_features_ctx *feat,
		@@ -3115,6 +3200,15 @@ static void ena_release_bars(struct ena_com_dev ena_dev, struct pci_dev pdev)
		pci_release_selected_regions(pdev, release_bars);
		}

		static inline void set_default_llq_configurations(struct ena_llq_configurations *llq_config)
		{
		llq_config->llq_header_location = ENA_ADMIN_INLINE_HEADER;
		llq_config->llq_ring_entry_size = ENA_ADMIN_LIST_ENTRY_SIZE_128B;
		llq_config->llq_stride_ctrl = ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY;
		llq_config->llq_num_decs_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2;
		llq_config->llq_ring_entry_size_value = 128;
		}

		static int ena_calc_queue_size(struct pci_dev *pdev,
		struct ena_com_dev *ena_dev,
		u16 *max_tx_sgl_size,
		@@ -3163,7 +3257,9 @@ static int ena_probe(struct pci_dev pdev, const struct pci_device_id ent)
		static int version_printed;
		struct net_device *netdev;
		struct ena_adapter *adapter;
		struct ena_llq_configurations llq_config;
		struct ena_com_dev *ena_dev = NULL;
		char *queue_type_str;
		static int adapters_found;
		int io_queue_num, bars, rc;
		int queue_size;
		@@ -3217,17 +3313,14 @@ static int ena_probe(struct pci_dev pdev, const struct pci_device_id ent)
		goto err_free_region;
		}

		ena_set_push_mode(pdev, ena_dev, &get_feat_ctx);
		set_default_llq_configurations(&llq_config);

		if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
		ena_dev->mem_bar = devm_ioremap_wc(&pdev->dev,
		pci_resource_start(pdev, ENA_MEM_BAR),
		pci_resource_len(pdev, ENA_MEM_BAR));
		if (!ena_dev->mem_bar) {
		rc = -EFAULT;
		rc = ena_set_queues_placement_policy(pdev, ena_dev, &get_feat_ctx.llq,
		&llq_config);
		if (rc) {
		dev_err(&pdev->dev, "ena device init failed\n");
		goto err_device_destroy;
		}
		}

		/* initial Tx interrupt delay, Assumes 1 usec granularity.
		* Updated during device initialization with the real granularity
		@@ -3241,8 +3334,10 @@ static int ena_probe(struct pci_dev pdev, const struct pci_device_id ent)
		goto err_device_destroy;
		}

		dev_info(&pdev->dev, "creating %d io queues. queue size: %d\n",
		io_queue_num, queue_size);
		dev_info(&pdev->dev, "creating %d io queues. queue size: %d. LLQ is %s\n",
		io_queue_num, queue_size,
		(ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) ?
		"ENABLED" : "DISABLED");

		/* dev zeroed in init_etherdev */
		netdev = alloc_etherdev_mq(sizeof(struct ena_adapter), io_queue_num);
		@@ -3332,9 +3427,15 @@ static int ena_probe(struct pci_dev pdev, const struct pci_device_id ent)
		timer_setup(&adapter->timer_service, ena_timer_service, 0);
		mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));

		dev_info(&pdev->dev, "%s found at mem %lx, mac addr %pM Queues %d\n",
		if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
		queue_type_str = "Regular";
		else
		queue_type_str = "Low Latency";

		dev_info(&pdev->dev,
		"%s found at mem %lx, mac addr %pM Queues %d, Placement policy: %s\n",
		DEVICE_NAME, (long)pci_resource_start(pdev, 0),
		netdev->dev_addr, io_queue_num);
		netdev->dev_addr, io_queue_num, queue_type_str);

		set_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);

drivers/net/ethernet/amazon/ena/ena_netdev.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -151,6 +151,9 @@ struct ena_tx_buffer {
		/* num of buffers used by this skb */
		u32 num_of_bufs;

		/* Indicate if bufs[0] map the linear data of the skb. */
		u8 map_linear_data;

		/* Used for detect missing tx packets to limit the number of prints */
		u32 print_once;
		/* Save the last jiffies to detect missing tx packets
		@@ -186,6 +189,7 @@ struct ena_stats_tx {
		u64 tx_poll;
		u64 doorbells;
		u64 bad_req_id;
		u64 llq_buffer_copy;
		u64 missed_tx;
		};

		@@ -257,6 +261,8 @@ struct ena_ring {
		struct ena_stats_tx tx_stats;
		struct ena_stats_rx rx_stats;
		};

		u8 *push_buf_intermediate_buf;
		int empty_rx_queue;
		} ____cacheline_aligned;

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