igb: add pci device pointer to ring structure

This patch adds a pci device pointer to the ring structure.  The main use of
this pointer is for memory mapping/unmapping of the rings.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 40 insertions, 41 deletions

diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h
index e52fee44aeac..de268620dd92 100644
--- a/drivers/net/igb/igb.h
+++ b/drivers/net/igb/igb.h
@@ -173,6 +173,7 @@ struct igb_q_vector {
 struct igb_ring {
         struct igb_q_vector *q_vector; /* backlink to q_vector */
         void *desc;                    /* descriptor ring memory */
+        struct pci_dev *pdev;          /* pci device for dma mapping */
         dma_addr_t dma;                /* phys address of the ring */
         unsigned int size;             /* length of desc. ring in bytes */
         unsigned int count;            /* number of desc. in the ring */
@@ -325,8 +326,8 @@ extern void igb_down(struct igb_adapter *);
 extern void igb_reinit_locked(struct igb_adapter *);
 extern void igb_reset(struct igb_adapter *);
 extern int igb_set_spd_dplx(struct igb_adapter *, u16);
-extern int igb_setup_tx_resources(struct igb_adapter *, struct igb_ring *);
-extern int igb_setup_rx_resources(struct igb_adapter *, struct igb_ring *);
+extern int igb_setup_tx_resources(struct igb_ring *);
+extern int igb_setup_rx_resources(struct igb_ring *);
 extern void igb_free_tx_resources(struct igb_ring *);
 extern void igb_free_rx_resources(struct igb_ring *);
 extern void igb_update_stats(struct igb_adapter *);
diff --git a/drivers/net/igb/igb_ethtool.c b/drivers/net/igb/igb_ethtool.c
index 2929546115c1..c48a555bda2c 100644
--- a/drivers/net/igb/igb_ethtool.c
+++ b/drivers/net/igb/igb_ethtool.c
@@ -794,7 +794,7 @@ static int igb_set_ringparam(struct net_device *netdev,
 
                 for (i = 0; i < adapter->num_tx_queues; i++) {
                         temp_ring[i].count = new_tx_count;
-                        err = igb_setup_tx_resources(adapter, &temp_ring[i]);
+                        err = igb_setup_tx_resources(&temp_ring[i]);
                         if (err) {
                                 while (i) {
                                         i--;
@@ -819,7 +819,7 @@ static int igb_set_ringparam(struct net_device *netdev,
 
                 for (i = 0; i < adapter->num_rx_queues; i++) {
                         temp_ring[i].count = new_rx_count;
-                        err = igb_setup_rx_resources(adapter, &temp_ring[i]);
+                        err = igb_setup_rx_resources(&temp_ring[i]);
                         if (err) {
                                 while (i) {
                                         i--;
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 2728f9316027..ff16b7ac0d1e 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -436,11 +436,13 @@ static int igb_alloc_queues(struct igb_adapter *adapter)
                 struct igb_ring *ring = &(adapter->tx_ring[i]);
                 ring->count = adapter->tx_ring_count;
                 ring->queue_index = i;
+                ring->pdev = adapter->pdev;
         }
         for (i = 0; i < adapter->num_rx_queues; i++) {
                 struct igb_ring *ring = &(adapter->rx_ring[i]);
                 ring->count = adapter->rx_ring_count;
                 ring->queue_index = i;
+                ring->pdev = adapter->pdev;
         }
 
         igb_cache_ring_register(adapter);
@@ -2002,15 +2004,13 @@ static int igb_close(struct net_device *netdev)
 
 /**
  * igb_setup_tx_resources - allocate Tx resources (Descriptors)
- * @adapter: board private structure
  * @tx_ring: tx descriptor ring (for a specific queue) to setup
  *
  * Return 0 on success, negative on failure
  **/
-int igb_setup_tx_resources(struct igb_adapter *adapter,
-                           struct igb_ring *tx_ring)
+int igb_setup_tx_resources(struct igb_ring *tx_ring)
 {
-        struct pci_dev *pdev = adapter->pdev;
+        struct pci_dev *pdev = tx_ring->pdev;
         int size;
 
         size = sizeof(struct igb_buffer) * tx_ring->count;
@@ -2053,7 +2053,7 @@ static int igb_setup_all_tx_resources(struct igb_adapter *adapter)
         int r_idx;
 
         for (i = 0; i < adapter->num_tx_queues; i++) {
-                err = igb_setup_tx_resources(adapter, &adapter->tx_ring[i]);
+                err = igb_setup_tx_resources(&adapter->tx_ring[i]);
                 if (err) {
                         dev_err(&adapter->pdev->dev,
                                 "Allocation for Tx Queue %u failed\n", i);
@@ -2156,15 +2156,13 @@ static void igb_configure_tx(struct igb_adapter *adapter)
 
 /**
  * igb_setup_rx_resources - allocate Rx resources (Descriptors)
- * @adapter: board private structure
  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
  *
  * Returns 0 on success, negative on failure
  **/
-int igb_setup_rx_resources(struct igb_adapter *adapter,
-                           struct igb_ring *rx_ring)
+int igb_setup_rx_resources(struct igb_ring *rx_ring)
 {
-        struct pci_dev *pdev = adapter->pdev;
+        struct pci_dev *pdev = rx_ring->pdev;
         int size, desc_len;
 
         size = sizeof(struct igb_buffer) * rx_ring->count;
@@ -2192,7 +2190,7 @@ int igb_setup_rx_resources(struct igb_adapter *adapter,
 
 err:
         vfree(rx_ring->buffer_info);
-        dev_err(&adapter->pdev->dev, "Unable to allocate memory for "
+        dev_err(&pdev->dev, "Unable to allocate memory for "
                 "the receive descriptor ring\n");
         return -ENOMEM;
 }
@@ -2209,7 +2207,7 @@ static int igb_setup_all_rx_resources(struct igb_adapter *adapter)
         int i, err = 0;
 
         for (i = 0; i < adapter->num_rx_queues; i++) {
-                err = igb_setup_rx_resources(adapter, &adapter->rx_ring[i]);
+                err = igb_setup_rx_resources(&adapter->rx_ring[i]);
                 if (err) {
                         dev_err(&adapter->pdev->dev,
                                 "Allocation for Rx Queue %u failed\n", i);
@@ -2497,14 +2495,13 @@ static void igb_configure_rx(struct igb_adapter *adapter)
  **/
 void igb_free_tx_resources(struct igb_ring *tx_ring)
 {
-        struct pci_dev *pdev = tx_ring->q_vector->adapter->pdev;
-
         igb_clean_tx_ring(tx_ring);
 
         vfree(tx_ring->buffer_info);
         tx_ring->buffer_info = NULL;
 
-        pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
+        pci_free_consistent(tx_ring->pdev, tx_ring->size,
+                            tx_ring->desc, tx_ring->dma);
 
         tx_ring->desc = NULL;
 }
@@ -2523,12 +2520,13 @@ static void igb_free_all_tx_resources(struct igb_adapter *adapter)
                 igb_free_tx_resources(&adapter->tx_ring[i]);
 }
 
-static void igb_unmap_and_free_tx_resource(struct igb_adapter *adapter,
+static void igb_unmap_and_free_tx_resource(struct igb_ring *tx_ring,
                                            struct igb_buffer *buffer_info)
 {
         buffer_info->dma = 0;
         if (buffer_info->skb) {
-                skb_dma_unmap(&adapter->pdev->dev, buffer_info->skb,
+                skb_dma_unmap(&tx_ring->pdev->dev,
+                              buffer_info->skb,
                               DMA_TO_DEVICE);
                 dev_kfree_skb_any(buffer_info->skb);
                 buffer_info->skb = NULL;
@@ -2543,7 +2541,6 @@ static void igb_unmap_and_free_tx_resource(struct igb_adapter *adapter,
  **/
 static void igb_clean_tx_ring(struct igb_ring *tx_ring)
 {
-        struct igb_adapter *adapter = tx_ring->q_vector->adapter;
         struct igb_buffer *buffer_info;
         unsigned long size;
         unsigned int i;
@@ -2554,7 +2551,7 @@ static void igb_clean_tx_ring(struct igb_ring *tx_ring)
 
         for (i = 0; i < tx_ring->count; i++) {
                 buffer_info = &tx_ring->buffer_info[i];
-                igb_unmap_and_free_tx_resource(adapter, buffer_info);
+                igb_unmap_and_free_tx_resource(tx_ring, buffer_info);
         }
 
         size = sizeof(struct igb_buffer) * tx_ring->count;
@@ -2591,14 +2588,13 @@ static void igb_clean_all_tx_rings(struct igb_adapter *adapter)
  **/
 void igb_free_rx_resources(struct igb_ring *rx_ring)
 {
-        struct pci_dev *pdev = rx_ring->q_vector->adapter->pdev;
-
         igb_clean_rx_ring(rx_ring);
 
         vfree(rx_ring->buffer_info);
         rx_ring->buffer_info = NULL;
 
-        pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
+        pci_free_consistent(rx_ring->pdev, rx_ring->size,
+                            rx_ring->desc, rx_ring->dma);
 
         rx_ring->desc = NULL;
 }
@@ -2625,7 +2621,6 @@ static void igb_clean_rx_ring(struct igb_ring *rx_ring)
 {
         struct igb_adapter *adapter = rx_ring->q_vector->adapter;
         struct igb_buffer *buffer_info;
-        struct pci_dev *pdev = adapter->pdev;
         unsigned long size;
         unsigned int i;
 
@@ -2635,7 +2630,8 @@ static void igb_clean_rx_ring(struct igb_ring *rx_ring)
         for (i = 0; i < rx_ring->count; i++) {
                 buffer_info = &rx_ring->buffer_info[i];
                 if (buffer_info->dma) {
-                        pci_unmap_single(pdev, buffer_info->dma,
+                        pci_unmap_single(rx_ring->pdev,
+                                         buffer_info->dma,
                                          adapter->rx_buffer_len,
                                          PCI_DMA_FROMDEVICE);
                         buffer_info->dma = 0;
@@ -2646,7 +2642,8 @@ static void igb_clean_rx_ring(struct igb_ring *rx_ring)
                         buffer_info->skb = NULL;
                 }
                 if (buffer_info->page_dma) {
-                        pci_unmap_page(pdev, buffer_info->page_dma,
+                        pci_unmap_page(rx_ring->pdev,
+                                       buffer_info->page_dma,
                                        PAGE_SIZE / 2,
                                        PCI_DMA_FROMDEVICE);
                         buffer_info->page_dma = 0;
@@ -3362,9 +3359,10 @@ static inline bool igb_tx_csum_adv(struct igb_adapter *adapter,
                                         struct sk_buff *skb, u32 tx_flags)
 {
         struct e1000_adv_tx_context_desc *context_desc;
-        unsigned int i;
+        struct pci_dev *pdev = tx_ring->pdev;
         struct igb_buffer *buffer_info;
         u32 info = 0, tu_cmd = 0;
+        unsigned int i;
 
         if ((skb->ip_summed == CHECKSUM_PARTIAL) ||
             (tx_flags & IGB_TX_FLAGS_VLAN)) {
@@ -3411,7 +3409,7 @@ static inline bool igb_tx_csum_adv(struct igb_adapter *adapter,
                                 break;
                         default:
                                 if (unlikely(net_ratelimit()))
-                                        dev_warn(&adapter->pdev->dev,
+                                        dev_warn(&pdev->dev,
                                             "partial checksum but proto=%x!\n",
                                             skb->protocol);
                                 break;
@@ -3443,11 +3441,11 @@ static inline bool igb_tx_csum_adv(struct igb_adapter *adapter,
 #define IGB_MAX_TXD_PWR 16
 #define IGB_MAX_DATA_PER_TXD    (1<<IGB_MAX_TXD_PWR)
 
-static inline int igb_tx_map_adv(struct igb_adapter *adapter,
-                                 struct igb_ring *tx_ring, struct sk_buff *skb,
+static inline int igb_tx_map_adv(struct igb_ring *tx_ring, struct sk_buff *skb,
                                  unsigned int first)
 {
         struct igb_buffer *buffer_info;
+        struct pci_dev *pdev = tx_ring->pdev;
         unsigned int len = skb_headlen(skb);
         unsigned int count = 0, i;
         unsigned int f;
@@ -3455,8 +3453,8 @@ static inline int igb_tx_map_adv(struct igb_adapter *adapter,
 
         i = tx_ring->next_to_use;
 
-        if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
-                dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
+        if (skb_dma_map(&pdev->dev, skb, DMA_TO_DEVICE)) {
+                dev_err(&pdev->dev, "TX DMA map failed\n");
                 return 0;
         }
 
@@ -3667,7 +3665,7 @@ static netdev_tx_t igb_xmit_frame_ring_adv(struct sk_buff *skb,
          * count reflects descriptors mapped, if 0 then mapping error
          * has occured and we need to rewind the descriptor queue
          */
-        count = igb_tx_map_adv(adapter, tx_ring, skb, first);
+        count = igb_tx_map_adv(tx_ring, skb, first);
 
         if (count) {
                 igb_tx_queue_adv(adapter, tx_ring, tx_flags, count,
@@ -4710,7 +4708,7 @@ static bool igb_clean_tx_irq(struct igb_q_vector *q_vector)
                                 igb_tx_hwtstamp(adapter, skb);
                         }
 
-                        igb_unmap_and_free_tx_resource(adapter, buffer_info);
+                        igb_unmap_and_free_tx_resource(tx_ring, buffer_info);
                         tx_desc->wb.status = 0;
 
                         i++;
@@ -4748,7 +4746,7 @@ static bool igb_clean_tx_irq(struct igb_q_vector *q_vector)
                          E1000_STATUS_TXOFF)) {
 
                         /* detected Tx unit hang */
-                        dev_err(&adapter->pdev->dev,
+                        dev_err(&tx_ring->pdev->dev,
                                 "Detected Tx Unit Hang\n"
                                 "  Tx Queue             <%d>\n"
                                 "  TDH                  <%x>\n"
@@ -4851,7 +4849,7 @@ static bool igb_clean_rx_irq_adv(struct igb_q_vector *q_vector,
         struct net_device *netdev = adapter->netdev;
         struct igb_ring *rx_ring = q_vector->rx_ring;
         struct e1000_hw *hw = &adapter->hw;
-        struct pci_dev *pdev = adapter->pdev;
+        struct pci_dev *pdev = rx_ring->pdev;
         union e1000_adv_rx_desc *rx_desc , *next_rxd;
         struct igb_buffer *buffer_info , *next_buffer;
         struct sk_buff *skb;
@@ -5027,7 +5025,6 @@ static void igb_alloc_rx_buffers_adv(struct igb_ring *rx_ring,
 {
         struct igb_adapter *adapter = rx_ring->q_vector->adapter;
         struct net_device *netdev = adapter->netdev;
-        struct pci_dev *pdev = adapter->pdev;
         union e1000_adv_rx_desc *rx_desc;
         struct igb_buffer *buffer_info;
         struct sk_buff *skb;
@@ -5054,7 +5051,7 @@ static void igb_alloc_rx_buffers_adv(struct igb_ring *rx_ring,
                                 buffer_info->page_offset ^= PAGE_SIZE / 2;
                         }
                         buffer_info->page_dma =
-                                pci_map_page(pdev, buffer_info->page,
+                                pci_map_page(rx_ring->pdev, buffer_info->page,
                                              buffer_info->page_offset,
                                              PAGE_SIZE / 2,
                                              PCI_DMA_FROMDEVICE);
@@ -5068,7 +5065,8 @@ static void igb_alloc_rx_buffers_adv(struct igb_ring *rx_ring,
                         }
 
                         buffer_info->skb = skb;
-                        buffer_info->dma = pci_map_single(pdev, skb->data,
+                        buffer_info->dma = pci_map_single(rx_ring->pdev,
+                                                          skb->data,
                                                           bufsz,
                                                           PCI_DMA_FROMDEVICE);
                 }