ixgbe: Cleanup references to Tx and Rx rings to becommon across the driver

Cleanup all the different references to the Tx ring and Rx ring structures
and make them common across the driver.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/net/ixgbe/ixgbe_main.c

@@ -290,38 +290,38 @@ static bool ixgbe_clean_tx_irq(struct ixgbe_adapter *adapter,
 
 #ifdef CONFIG_DCA
 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
-				struct ixgbe_ring *rxr)
+				struct ixgbe_ring *rx_ring)
 {
 	u32 rxctrl;
 	int cpu = get_cpu();
-	int q = rxr - adapter->rx_ring;
+	int q = rx_ring - adapter->rx_ring;
 
-	if (rxr->cpu != cpu) {
+	if (rx_ring->cpu != cpu) {
 		rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
 		rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
 		rxctrl |= dca_get_tag(cpu);
 		rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
 		rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
 		IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
-		rxr->cpu = cpu;
+		rx_ring->cpu = cpu;
 	}
 	put_cpu();
 }
 
 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
-				struct ixgbe_ring *txr)
+				struct ixgbe_ring *tx_ring)
 {
 	u32 txctrl;
 	int cpu = get_cpu();
-	int q = txr - adapter->tx_ring;
+	int q = tx_ring - adapter->tx_ring;
 
-	if (txr->cpu != cpu) {
+	if (tx_ring->cpu != cpu) {
 		txctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q));
 		txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
 		txctrl |= dca_get_tag(cpu);
 		txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
 		IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q), txctrl);
-		txr->cpu = cpu;
+		tx_ring->cpu = cpu;
 	}
 	put_cpu();
 }
@@ -459,31 +459,30 @@ static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
 	struct net_device *netdev = adapter->netdev;
 	struct pci_dev *pdev = adapter->pdev;
 	union ixgbe_adv_rx_desc *rx_desc;
-	struct ixgbe_rx_buffer *rx_buffer_info;
-	struct sk_buff *skb;
+	struct ixgbe_rx_buffer *bi;
 	unsigned int i;
 	unsigned int bufsz = adapter->rx_buf_len + NET_IP_ALIGN;
 
 	i = rx_ring->next_to_use;
-	rx_buffer_info = &rx_ring->rx_buffer_info[i];
+	bi = &rx_ring->rx_buffer_info[i];
 
 	while (cleaned_count--) {
 		rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 
-		if (!rx_buffer_info->page &&
-				(adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
-			rx_buffer_info->page = alloc_page(GFP_ATOMIC);
-			if (!rx_buffer_info->page) {
+		if (!bi->page &&
+		    (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
+			bi->page = alloc_page(GFP_ATOMIC);
+			if (!bi->page) {
 				adapter->alloc_rx_page_failed++;
 				goto no_buffers;
 			}
-			rx_buffer_info->page_dma =
-			    pci_map_page(pdev, rx_buffer_info->page,
-					 0, PAGE_SIZE, PCI_DMA_FROMDEVICE);
+			bi->page_dma = pci_map_page(pdev, bi->page, 0,
+			                            PAGE_SIZE,
+			                            PCI_DMA_FROMDEVICE);
 		}
 
-		if (!rx_buffer_info->skb) {
-			skb = netdev_alloc_skb(netdev, bufsz);
+		if (!bi->skb) {
+			struct sk_buff *skb = netdev_alloc_skb(netdev, bufsz);
 
 			if (!skb) {
 				adapter->alloc_rx_buff_failed++;
@@ -497,27 +496,23 @@ static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
 			 */
 			skb_reserve(skb, NET_IP_ALIGN);
 
-			rx_buffer_info->skb = skb;
-			rx_buffer_info->dma = pci_map_single(pdev, skb->data,
-							  bufsz,
-							  PCI_DMA_FROMDEVICE);
+			bi->skb = skb;
+			bi->dma = pci_map_single(pdev, skb->data, bufsz,
+			                         PCI_DMA_FROMDEVICE);
 		}
 		/* Refresh the desc even if buffer_addrs didn't change because
 		 * each write-back erases this info. */
 		if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
-			rx_desc->read.pkt_addr =
-			    cpu_to_le64(rx_buffer_info->page_dma);
-			rx_desc->read.hdr_addr =
-					cpu_to_le64(rx_buffer_info->dma);
+			rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
+			rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
 		} else {
-			rx_desc->read.pkt_addr =
-					cpu_to_le64(rx_buffer_info->dma);
+			rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
 		}
 
 		i++;
 		if (i == rx_ring->count)
 			i = 0;
-		rx_buffer_info = &rx_ring->rx_buffer_info[i];
+		bi = &rx_ring->rx_buffer_info[i];
 	}
 no_buffers:
 	if (rx_ring->next_to_use != i) {
@@ -896,7 +891,7 @@ static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
 {
 	struct ixgbe_q_vector *q_vector = data;
 	struct ixgbe_adapter  *adapter = q_vector->adapter;
-	struct ixgbe_ring     *txr;
+	struct ixgbe_ring     *tx_ring;
 	int i, r_idx;
 
 	if (!q_vector->txr_count)
@@ -904,14 +899,14 @@ static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
 
 	r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
 	for (i = 0; i < q_vector->txr_count; i++) {
-		txr = &(adapter->tx_ring[r_idx]);
+		tx_ring = &(adapter->tx_ring[r_idx]);
 #ifdef CONFIG_DCA
 		if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
-			ixgbe_update_tx_dca(adapter, txr);
+			ixgbe_update_tx_dca(adapter, tx_ring);
 #endif
-		txr->total_bytes = 0;
-		txr->total_packets = 0;
-		ixgbe_clean_tx_irq(adapter, txr);
+		tx_ring->total_bytes = 0;
+		tx_ring->total_packets = 0;
+		ixgbe_clean_tx_irq(adapter, tx_ring);
 		r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
 				      r_idx + 1);
 	}
@@ -928,18 +923,18 @@ static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
 {
 	struct ixgbe_q_vector *q_vector = data;
 	struct ixgbe_adapter  *adapter = q_vector->adapter;
-	struct ixgbe_ring  *rxr;
+	struct ixgbe_ring  *rx_ring;
 	int r_idx;
 
 	r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
 	if (!q_vector->rxr_count)
 		return IRQ_HANDLED;
 
-	rxr = &(adapter->rx_ring[r_idx]);
+	rx_ring = &(adapter->rx_ring[r_idx]);
 	/* disable interrupts on this vector only */
-	IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, rxr->v_idx);
-	rxr->total_bytes = 0;
-	rxr->total_packets = 0;
+	IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, rx_ring->v_idx);
+	rx_ring->total_bytes = 0;
+	rx_ring->total_packets = 0;
 	netif_rx_schedule(adapter->netdev, &q_vector->napi);
 
 	return IRQ_HANDLED;
@@ -964,18 +959,18 @@ static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
 	struct ixgbe_q_vector *q_vector =
 			       container_of(napi, struct ixgbe_q_vector, napi);
 	struct ixgbe_adapter *adapter = q_vector->adapter;
-	struct ixgbe_ring *rxr;
+	struct ixgbe_ring *rx_ring;
 	int work_done = 0;
 	long r_idx;
 
 	r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
-	rxr = &(adapter->rx_ring[r_idx]);
+	rx_ring = &(adapter->rx_ring[r_idx]);
 #ifdef CONFIG_DCA
 	if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
-		ixgbe_update_rx_dca(adapter, rxr);
+		ixgbe_update_rx_dca(adapter, rx_ring);
 #endif
 
-	ixgbe_clean_rx_irq(adapter, rxr, &work_done, budget);
+	ixgbe_clean_rx_irq(adapter, rx_ring, &work_done, budget);
 
 	/* If all Rx work done, exit the polling mode */
 	if (work_done < budget) {
@@ -983,7 +978,7 @@ static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
 		if (adapter->rx_eitr < IXGBE_MIN_ITR_USECS)
 			ixgbe_set_itr_msix(q_vector);
 		if (!test_bit(__IXGBE_DOWN, &adapter->state))
-			IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, rxr->v_idx);
+			IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, rx_ring->v_idx);
 	}
 
 	return work_done;
@@ -1342,7 +1337,7 @@ static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
 }
 
 /**
- * ixgbe_configure_tx - Configure 8254x Transmit Unit after Reset
+ * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
  * @adapter: board private structure
  *
  * Configure the Tx unit of the MAC after a reset.
@@ -1408,7 +1403,7 @@ static int ixgbe_get_skb_hdr(struct sk_buff *skb, void **iphdr, void **tcph,
 }
 
 /**
- * ixgbe_configure_rx - Configure 8254x Receive Unit after Reset
+ * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
  * @adapter: board private structure
  *
  * Configure the Rx unit of the MAC after a reset.
@@ -2483,40 +2478,41 @@ static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
 /**
  * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
  * @adapter: board private structure
- * @txdr:    tx descriptor ring (for a specific queue) to setup
+ * @tx_ring:    tx descriptor ring (for a specific queue) to setup
  *
  * Return 0 on success, negative on failure
  **/
 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
-			     struct ixgbe_ring *txdr)
+			     struct ixgbe_ring *tx_ring)
 {
 	struct pci_dev *pdev = adapter->pdev;
 	int size;
 
-	size = sizeof(struct ixgbe_tx_buffer) * txdr->count;
-	txdr->tx_buffer_info = vmalloc(size);
-	if (!txdr->tx_buffer_info) {
+	size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
+	tx_ring->tx_buffer_info = vmalloc(size);
+	if (!tx_ring->tx_buffer_info) {
 		DPRINTK(PROBE, ERR,
 		"Unable to allocate memory for the transmit descriptor ring\n");
 		return -ENOMEM;
 	}
-	memset(txdr->tx_buffer_info, 0, size);
+	memset(tx_ring->tx_buffer_info, 0, size);
 
 	/* round up to nearest 4K */
-	txdr->size = txdr->count * sizeof(union ixgbe_adv_tx_desc);
-	txdr->size = ALIGN(txdr->size, 4096);
+	tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
+	tx_ring->size = ALIGN(tx_ring->size, 4096);
 
-	txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
-	if (!txdr->desc) {
-		vfree(txdr->tx_buffer_info);
+	tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
+	                                     &tx_ring->dma);
+	if (!tx_ring->desc) {
+		vfree(tx_ring->tx_buffer_info);
 		DPRINTK(PROBE, ERR,
 			"Memory allocation failed for the tx desc ring\n");
 		return -ENOMEM;
 	}
 
-	txdr->next_to_use = 0;
-	txdr->next_to_clean = 0;
-	txdr->work_limit = txdr->count;
+	tx_ring->next_to_use = 0;
+	tx_ring->next_to_clean = 0;
+	tx_ring->work_limit = tx_ring->count;
 
 	return 0;
 }
@@ -2524,52 +2520,52 @@ int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
 /**
  * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
  * @adapter: board private structure
- * @rxdr:    rx descriptor ring (for a specific queue) to setup
+ * @rx_ring:    rx descriptor ring (for a specific queue) to setup
  *
  * Returns 0 on success, negative on failure
  **/
 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
-			     struct ixgbe_ring *rxdr)
+			     struct ixgbe_ring *rx_ring)
 {
 	struct pci_dev *pdev = adapter->pdev;
 	int size;
 
 	size = sizeof(struct net_lro_desc) * IXGBE_MAX_LRO_DESCRIPTORS;
-	rxdr->lro_mgr.lro_arr = vmalloc(size);
-	if (!rxdr->lro_mgr.lro_arr)
+	rx_ring->lro_mgr.lro_arr = vmalloc(size);
+	if (!rx_ring->lro_mgr.lro_arr)
 		return -ENOMEM;
-	memset(rxdr->lro_mgr.lro_arr, 0, size);
+	memset(rx_ring->lro_mgr.lro_arr, 0, size);
 
-	size = sizeof(struct ixgbe_rx_buffer) * rxdr->count;
-	rxdr->rx_buffer_info = vmalloc(size);
-	if (!rxdr->rx_buffer_info) {
+	size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
+	rx_ring->rx_buffer_info = vmalloc(size);
+	if (!rx_ring->rx_buffer_info) {
 		DPRINTK(PROBE, ERR,
 			"vmalloc allocation failed for the rx desc ring\n");
 		goto alloc_failed;
 	}
-	memset(rxdr->rx_buffer_info, 0, size);
+	memset(rx_ring->rx_buffer_info, 0, size);
 
 	/* Round up to nearest 4K */
-	rxdr->size = rxdr->count * sizeof(union ixgbe_adv_rx_desc);
-	rxdr->size = ALIGN(rxdr->size, 4096);
+	rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
+	rx_ring->size = ALIGN(rx_ring->size, 4096);
 
-	rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
+	rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, &rx_ring->dma);
 
-	if (!rxdr->desc) {
+	if (!rx_ring->desc) {
 		DPRINTK(PROBE, ERR,
 			"Memory allocation failed for the rx desc ring\n");
-		vfree(rxdr->rx_buffer_info);
+		vfree(rx_ring->rx_buffer_info);
 		goto alloc_failed;
 	}
 
-	rxdr->next_to_clean = 0;
-	rxdr->next_to_use = 0;
+	rx_ring->next_to_clean = 0;
+	rx_ring->next_to_use = 0;
 
 	return 0;
 
 alloc_failed:
-	vfree(rxdr->lro_mgr.lro_arr);
-	rxdr->lro_mgr.lro_arr = NULL;
+	vfree(rx_ring->lro_mgr.lro_arr);
+	rx_ring->lro_mgr.lro_arr = NULL;
 	return -ENOMEM;
 }