sfc: Use generic DMA API, not PCI-DMA API

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

5 files changed, 62 insertions, 63 deletions

diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index b95f2e1b33f0..70554a1b2b02 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -1103,8 +1103,8 @@ static int efx_init_io(struct efx_nic *efx)
          * masks event though they reject 46 bit masks.
          */
         while (dma_mask > 0x7fffffffUL) {
-                if (pci_dma_supported(pci_dev, dma_mask)) {
-                        rc = pci_set_dma_mask(pci_dev, dma_mask);
+                if (dma_supported(&pci_dev->dev, dma_mask)) {
+                        rc = dma_set_mask(&pci_dev->dev, dma_mask);
                         if (rc == 0)
                                 break;
                 }
@@ -1117,10 +1117,10 @@ static int efx_init_io(struct efx_nic *efx)
         }
         netif_dbg(efx, probe, efx->net_dev,
                   "using DMA mask %llx\n", (unsigned long long) dma_mask);
-        rc = pci_set_consistent_dma_mask(pci_dev, dma_mask);
+        rc = dma_set_coherent_mask(&pci_dev->dev, dma_mask);
         if (rc) {
-                /* pci_set_consistent_dma_mask() is not *allowed* to
-                 * fail with a mask that pci_set_dma_mask() accepted,
+                /* dma_set_coherent_mask() is not *allowed* to
+                 * fail with a mask that dma_set_mask() accepted,
                  * but just in case...
                  */
                 netif_err(efx, probe, efx->net_dev,
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index 0e575359af17..8a9f6d48214d 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -100,7 +100,7 @@ struct efx_special_buffer {
  * @len: Length of this fragment.
  *      This field is zero when the queue slot is empty.
  * @continuation: True if this fragment is not the end of a packet.
- * @unmap_single: True if pci_unmap_single should be used.
+ * @unmap_single: True if dma_unmap_single should be used.
  * @unmap_len: Length of this fragment to unmap
  */
 struct efx_tx_buffer {
diff --git a/drivers/net/ethernet/sfc/nic.c b/drivers/net/ethernet/sfc/nic.c
index 4a9a5beec8fc..287738db24e5 100644
--- a/drivers/net/ethernet/sfc/nic.c
+++ b/drivers/net/ethernet/sfc/nic.c
@@ -308,8 +308,8 @@ efx_free_special_buffer(struct efx_nic *efx, struct efx_special_buffer *buffer)
 int efx_nic_alloc_buffer(struct efx_nic *efx, struct efx_buffer *buffer,
                          unsigned int len)
 {
-        buffer->addr = pci_alloc_consistent(efx->pci_dev, len,
-                                            &buffer->dma_addr);
+        buffer->addr = dma_alloc_coherent(&efx->pci_dev->dev, len,
+                                          &buffer->dma_addr, GFP_ATOMIC);
         if (!buffer->addr)
                 return -ENOMEM;
         buffer->len = len;
@@ -320,8 +320,8 @@ int efx_nic_alloc_buffer(struct efx_nic *efx, struct efx_buffer *buffer,
 void efx_nic_free_buffer(struct efx_nic *efx, struct efx_buffer *buffer)
 {
         if (buffer->addr) {
-                pci_free_consistent(efx->pci_dev, buffer->len,
-                                    buffer->addr, buffer->dma_addr);
+                dma_free_coherent(&efx->pci_dev->dev, buffer->len,
+                                  buffer->addr, buffer->dma_addr);
                 buffer->addr = NULL;
         }
 }
diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c
index 243e91f3dff9..6d1c6cfd6ba8 100644
--- a/drivers/net/ethernet/sfc/rx.c
+++ b/drivers/net/ethernet/sfc/rx.c
@@ -155,11 +155,11 @@ static int efx_init_rx_buffers_skb(struct efx_rx_queue *rx_queue)
                 rx_buf->len = skb_len - NET_IP_ALIGN;
                 rx_buf->flags = 0;
 
-                rx_buf->dma_addr = pci_map_single(efx->pci_dev,
+                rx_buf->dma_addr = dma_map_single(&efx->pci_dev->dev,
                                                   skb->data, rx_buf->len,
-                                                  PCI_DMA_FROMDEVICE);
-                if (unlikely(pci_dma_mapping_error(efx->pci_dev,
-                                                   rx_buf->dma_addr))) {
+                                                  DMA_FROM_DEVICE);
+                if (unlikely(dma_mapping_error(&efx->pci_dev->dev,
+                                               rx_buf->dma_addr))) {
                         dev_kfree_skb_any(skb);
                         rx_buf->u.skb = NULL;
                         return -EIO;
@@ -200,10 +200,10 @@ static int efx_init_rx_buffers_page(struct efx_rx_queue *rx_queue)
                                    efx->rx_buffer_order);
                 if (unlikely(page == NULL))
                         return -ENOMEM;
-                dma_addr = pci_map_page(efx->pci_dev, page, 0,
+                dma_addr = dma_map_page(&efx->pci_dev->dev, page, 0,
                                         efx_rx_buf_size(efx),
-                                        PCI_DMA_FROMDEVICE);
-                if (unlikely(pci_dma_mapping_error(efx->pci_dev, dma_addr))) {
+                                        DMA_FROM_DEVICE);
+                if (unlikely(dma_mapping_error(&efx->pci_dev->dev, dma_addr))) {
                         __free_pages(page, efx->rx_buffer_order);
                         return -EIO;
                 }
@@ -247,14 +247,14 @@ static void efx_unmap_rx_buffer(struct efx_nic *efx,
 
                 state = page_address(rx_buf->u.page);
                 if (--state->refcnt == 0) {
-                        pci_unmap_page(efx->pci_dev,
+                        dma_unmap_page(&efx->pci_dev->dev,
                                        state->dma_addr,
                                        efx_rx_buf_size(efx),
-                                       PCI_DMA_FROMDEVICE);
+                                       DMA_FROM_DEVICE);
                 }
         } else if (!(rx_buf->flags & EFX_RX_BUF_PAGE) && rx_buf->u.skb) {
-                pci_unmap_single(efx->pci_dev, rx_buf->dma_addr,
-                                 rx_buf->len, PCI_DMA_FROMDEVICE);
+                dma_unmap_single(&efx->pci_dev->dev, rx_buf->dma_addr,
+                                 rx_buf->len, DMA_FROM_DEVICE);
         }
 }
 
diff --git a/drivers/net/ethernet/sfc/tx.c b/drivers/net/ethernet/sfc/tx.c
index 94d0365b31cd..18860f241bc5 100644
--- a/drivers/net/ethernet/sfc/tx.c
+++ b/drivers/net/ethernet/sfc/tx.c
@@ -36,15 +36,15 @@ static void efx_dequeue_buffer(struct efx_tx_queue *tx_queue,
                                unsigned int *bytes_compl)
 {
         if (buffer->unmap_len) {
-                struct pci_dev *pci_dev = tx_queue->efx->pci_dev;
+                struct device *dma_dev = &tx_queue->efx->pci_dev->dev;
                 dma_addr_t unmap_addr = (buffer->dma_addr + buffer->len -
                                          buffer->unmap_len);
                 if (buffer->unmap_single)
-                        pci_unmap_single(pci_dev, unmap_addr, buffer->unmap_len,
-                                         PCI_DMA_TODEVICE);
+                        dma_unmap_single(dma_dev, unmap_addr, buffer->unmap_len,
+                                         DMA_TO_DEVICE);
                 else
-                        pci_unmap_page(pci_dev, unmap_addr, buffer->unmap_len,
-                                       PCI_DMA_TODEVICE);
+                        dma_unmap_page(dma_dev, unmap_addr, buffer->unmap_len,
+                                       DMA_TO_DEVICE);
                 buffer->unmap_len = 0;
                 buffer->unmap_single = false;
         }
@@ -138,7 +138,7 @@ efx_max_tx_len(struct efx_nic *efx, dma_addr_t dma_addr)
 netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
 {
         struct efx_nic *efx = tx_queue->efx;
-        struct pci_dev *pci_dev = efx->pci_dev;
+        struct device *dma_dev = &efx->pci_dev->dev;
         struct efx_tx_buffer *buffer;
         skb_frag_t *fragment;
         unsigned int len, unmap_len = 0, fill_level, insert_ptr;
@@ -167,17 +167,17 @@ netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
         fill_level = tx_queue->insert_count - tx_queue->old_read_count;
         q_space = efx->txq_entries - 1 - fill_level;
 
-        /* Map for DMA.  Use pci_map_single rather than pci_map_page
+        /* Map for DMA.  Use dma_map_single rather than dma_map_page
          * since this is more efficient on machines with sparse
          * memory.
          */
         unmap_single = true;
-        dma_addr = pci_map_single(pci_dev, skb->data, len, PCI_DMA_TODEVICE);
+        dma_addr = dma_map_single(dma_dev, skb->data, len, PCI_DMA_TODEVICE);
 
         /* Process all fragments */
         while (1) {
-                if (unlikely(pci_dma_mapping_error(pci_dev, dma_addr)))
-                        goto pci_err;
+                if (unlikely(dma_mapping_error(dma_dev, dma_addr)))
+                        goto dma_err;
 
                 /* Store fields for marking in the per-fragment final
                  * descriptor */
@@ -246,7 +246,7 @@ netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
                 i++;
                 /* Map for DMA */
                 unmap_single = false;
-                dma_addr = skb_frag_dma_map(&pci_dev->dev, fragment, 0, len,
+                dma_addr = skb_frag_dma_map(dma_dev, fragment, 0, len,
                                             DMA_TO_DEVICE);
         }
 
@@ -261,7 +261,7 @@ netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
 
         return NETDEV_TX_OK;
 
- pci_err:
+ dma_err:
         netif_err(efx, tx_err, efx->net_dev,
                   " TX queue %d could not map skb with %d bytes %d "
                   "fragments for DMA\n", tx_queue->queue, skb->len,
@@ -284,11 +284,11 @@ netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
         /* Free the fragment we were mid-way through pushing */
         if (unmap_len) {
                 if (unmap_single)
-                        pci_unmap_single(pci_dev, unmap_addr, unmap_len,
-                                         PCI_DMA_TODEVICE);
+                        dma_unmap_single(dma_dev, unmap_addr, unmap_len,
+                                         DMA_TO_DEVICE);
                 else
-                        pci_unmap_page(pci_dev, unmap_addr, unmap_len,
-                                       PCI_DMA_TODEVICE);
+                        dma_unmap_page(dma_dev, unmap_addr, unmap_len,
+                                       DMA_TO_DEVICE);
         }
 
         return rc;
@@ -684,20 +684,19 @@ static __be16 efx_tso_check_protocol(struct sk_buff *skb)
  */
 static int efx_tsoh_block_alloc(struct efx_tx_queue *tx_queue)
 {
-
-        struct pci_dev *pci_dev = tx_queue->efx->pci_dev;
+        struct device *dma_dev = &tx_queue->efx->pci_dev->dev;
         struct efx_tso_header *tsoh;
         dma_addr_t dma_addr;
         u8 *base_kva, *kva;
 
-        base_kva = pci_alloc_consistent(pci_dev, PAGE_SIZE, &dma_addr);
+        base_kva = dma_alloc_coherent(dma_dev, PAGE_SIZE, &dma_addr, GFP_ATOMIC);
         if (base_kva == NULL) {
                 netif_err(tx_queue->efx, tx_err, tx_queue->efx->net_dev,
                           "Unable to allocate page for TSO headers\n");
                 return -ENOMEM;
         }
 
-        /* pci_alloc_consistent() allocates pages. */
+        /* dma_alloc_coherent() allocates pages. */
         EFX_BUG_ON_PARANOID(dma_addr & (PAGE_SIZE - 1u));
 
         for (kva = base_kva; kva < base_kva + PAGE_SIZE; kva += TSOH_STD_SIZE) {
@@ -714,7 +713,7 @@ static int efx_tsoh_block_alloc(struct efx_tx_queue *tx_queue)
 /* Free up a TSO header, and all others in the same page. */
 static void efx_tsoh_block_free(struct efx_tx_queue *tx_queue,
                                 struct efx_tso_header *tsoh,
-                                struct pci_dev *pci_dev)
+                                struct device *dma_dev)
 {
         struct efx_tso_header **p;
         unsigned long base_kva;
@@ -731,7 +730,7 @@ static void efx_tsoh_block_free(struct efx_tx_queue *tx_queue,
                         p = &(*p)->next;
         }
 
-        pci_free_consistent(pci_dev, PAGE_SIZE, (void *)base_kva, base_dma);
+        dma_free_coherent(dma_dev, PAGE_SIZE, (void *)base_kva, base_dma);
 }
 
 static struct efx_tso_header *
@@ -743,11 +742,11 @@ efx_tsoh_heap_alloc(struct efx_tx_queue *tx_queue, size_t header_len)
         if (unlikely(!tsoh))
                 return NULL;
 
-        tsoh->dma_addr = pci_map_single(tx_queue->efx->pci_dev,
+        tsoh->dma_addr = dma_map_single(&tx_queue->efx->pci_dev->dev,
                                         TSOH_BUFFER(tsoh), header_len,
-                                        PCI_DMA_TODEVICE);
-        if (unlikely(pci_dma_mapping_error(tx_queue->efx->pci_dev,
-                                           tsoh->dma_addr))) {
+                                        DMA_TO_DEVICE);
+        if (unlikely(dma_mapping_error(&tx_queue->efx->pci_dev->dev,
+                                       tsoh->dma_addr))) {
                 kfree(tsoh);
                 return NULL;
         }
@@ -759,9 +758,9 @@ efx_tsoh_heap_alloc(struct efx_tx_queue *tx_queue, size_t header_len)
 static void
 efx_tsoh_heap_free(struct efx_tx_queue *tx_queue, struct efx_tso_header *tsoh)
 {
-        pci_unmap_single(tx_queue->efx->pci_dev,
+        dma_unmap_single(&tx_queue->efx->pci_dev->dev,
                          tsoh->dma_addr, tsoh->unmap_len,
-                         PCI_DMA_TODEVICE);
+                         DMA_TO_DEVICE);
         kfree(tsoh);
 }
 
@@ -892,13 +891,13 @@ static void efx_enqueue_unwind(struct efx_tx_queue *tx_queue)
                         unmap_addr = (buffer->dma_addr + buffer->len -
                                       buffer->unmap_len);
                         if (buffer->unmap_single)
-                                pci_unmap_single(tx_queue->efx->pci_dev,
+                                dma_unmap_single(&tx_queue->efx->pci_dev->dev,
                                                  unmap_addr, buffer->unmap_len,
-                                                 PCI_DMA_TODEVICE);
+                                                 DMA_TO_DEVICE);
                         else
-                                pci_unmap_page(tx_queue->efx->pci_dev,
+                                dma_unmap_page(&tx_queue->efx->pci_dev->dev,
                                                unmap_addr, buffer->unmap_len,
-                                               PCI_DMA_TODEVICE);
+                                               DMA_TO_DEVICE);
                         buffer->unmap_len = 0;
                 }
                 buffer->len = 0;
@@ -954,9 +953,9 @@ static int tso_get_head_fragment(struct tso_state *st, struct efx_nic *efx,
         int hl = st->header_len;
         int len = skb_headlen(skb) - hl;
 
-        st->unmap_addr = pci_map_single(efx->pci_dev, skb->data + hl,
-                                        len, PCI_DMA_TODEVICE);
-        if (likely(!pci_dma_mapping_error(efx->pci_dev, st->unmap_addr))) {
+        st->unmap_addr = dma_map_single(&efx->pci_dev->dev, skb->data + hl,
+                                        len, DMA_TO_DEVICE);
+        if (likely(!dma_mapping_error(&efx->pci_dev->dev, st->unmap_addr))) {
                 st->unmap_single = true;
                 st->unmap_len = len;
                 st->in_len = len;
@@ -1008,7 +1007,7 @@ static int tso_fill_packet_with_fragment(struct efx_tx_queue *tx_queue,
                 buffer->continuation = !end_of_packet;
 
                 if (st->in_len == 0) {
-                        /* Transfer ownership of the pci mapping */
+                        /* Transfer ownership of the DMA mapping */
                         buffer->unmap_len = st->unmap_len;
                         buffer->unmap_single = st->unmap_single;
                         st->unmap_len = 0;
@@ -1181,18 +1180,18 @@ static int efx_enqueue_skb_tso(struct efx_tx_queue *tx_queue,
 
  mem_err:
         netif_err(efx, tx_err, efx->net_dev,
-                  "Out of memory for TSO headers, or PCI mapping error\n");
+                  "Out of memory for TSO headers, or DMA mapping error\n");
         dev_kfree_skb_any(skb);
 
  unwind:
         /* Free the DMA mapping we were in the process of writing out */
         if (state.unmap_len) {
                 if (state.unmap_single)
-                        pci_unmap_single(efx->pci_dev, state.unmap_addr,
-                                         state.unmap_len, PCI_DMA_TODEVICE);
+                        dma_unmap_single(&efx->pci_dev->dev, state.unmap_addr,
+                                         state.unmap_len, DMA_TO_DEVICE);
                 else
-                        pci_unmap_page(efx->pci_dev, state.unmap_addr,
-                                       state.unmap_len, PCI_DMA_TODEVICE);
+                        dma_unmap_page(&efx->pci_dev->dev, state.unmap_addr,
+                                       state.unmap_len, DMA_TO_DEVICE);
         }
 
         efx_enqueue_unwind(tx_queue);
@@ -1216,5 +1215,5 @@ static void efx_fini_tso(struct efx_tx_queue *tx_queue)
 
         while (tx_queue->tso_headers_free != NULL)
                 efx_tsoh_block_free(tx_queue, tx_queue->tso_headers_free,
-                                    tx_queue->efx->pci_dev);
+                                    &tx_queue->efx->pci_dev->dev);
 }