ath9k: convert to use bus-agnostic DMA routines

Convert to use bus-agnostic DMA routines to make it usable on AHB bus as well.

Changes-licensed-under: ISC

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
Tested-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 38 insertions, 48 deletions

diff --git a/drivers/net/wireless/ath9k/beacon.c b/drivers/net/wireless/ath9k/beacon.c
index f02b099d3e3a..be1d84a5dafb 100644
--- a/drivers/net/wireless/ath9k/beacon.c
+++ b/drivers/net/wireless/ath9k/beacon.c
@@ -164,9 +164,9 @@ static struct ath_buf *ath_beacon_generate(struct ath_softc *sc, int if_id)
         bf = avp->av_bcbuf;
         skb = (struct sk_buff *)bf->bf_mpdu;
         if (skb) {
-                pci_unmap_single(to_pci_dev(sc->dev), bf->bf_dmacontext,
+                dma_unmap_single(sc->dev, bf->bf_dmacontext,
                                  skb->len,
-                                 PCI_DMA_TODEVICE);
+                                 DMA_TO_DEVICE);
                 dev_kfree_skb_any(skb);
         }
 
@@ -188,15 +188,14 @@ static struct ath_buf *ath_beacon_generate(struct ath_softc *sc, int if_id)
         }
 
         bf->bf_buf_addr = bf->bf_dmacontext =
-                pci_map_single(to_pci_dev(sc->dev), skb->data,
+                dma_map_single(sc->dev, skb->data,
                                skb->len,
-                               PCI_DMA_TODEVICE);
-        if (unlikely(pci_dma_mapping_error(to_pci_dev(sc->dev),
-                                           bf->bf_buf_addr))) {
+                               DMA_TO_DEVICE);
+        if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
                 dev_kfree_skb_any(skb);
                 bf->bf_mpdu = NULL;
                 DPRINTF(sc, ATH_DBG_CONFIG,
-                        "pci_dma_mapping_error() on beaconing\n");
+                        "dma_mapping_error() on beaconing\n");
                 return NULL;
         }
 
@@ -344,9 +343,9 @@ int ath_beacon_alloc(struct ath_softc *sc, int if_id)
         bf = avp->av_bcbuf;
         if (bf->bf_mpdu != NULL) {
                 skb = (struct sk_buff *)bf->bf_mpdu;
-                pci_unmap_single(to_pci_dev(sc->dev), bf->bf_dmacontext,
+                dma_unmap_single(sc->dev, bf->bf_dmacontext,
                                  skb->len,
-                                 PCI_DMA_TODEVICE);
+                                 DMA_TO_DEVICE);
                 dev_kfree_skb_any(skb);
                 bf->bf_mpdu = NULL;
         }
@@ -403,15 +402,14 @@ int ath_beacon_alloc(struct ath_softc *sc, int if_id)
 
         bf->bf_mpdu = skb;
         bf->bf_buf_addr = bf->bf_dmacontext =
-                pci_map_single(to_pci_dev(sc->dev), skb->data,
+                dma_map_single(sc->dev, skb->data,
                                skb->len,
-                               PCI_DMA_TODEVICE);
-        if (unlikely(pci_dma_mapping_error(to_pci_dev(sc->dev),
-                                           bf->bf_buf_addr))) {
+                               DMA_TO_DEVICE);
+        if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
                 dev_kfree_skb_any(skb);
                 bf->bf_mpdu = NULL;
                 DPRINTF(sc, ATH_DBG_CONFIG,
-                        "pci_dma_mapping_error() on beacon alloc\n");
+                        "dma_mapping_error() on beacon alloc\n");
                 return -ENOMEM;
         }
 
@@ -431,10 +429,9 @@ void ath_beacon_return(struct ath_softc *sc, struct ath_vap *avp)
                 bf = avp->av_bcbuf;
                 if (bf->bf_mpdu != NULL) {
                         struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu;
-                        pci_unmap_single(to_pci_dev(sc->dev),
-                                         bf->bf_dmacontext,
+                        dma_unmap_single(sc->dev, bf->bf_dmacontext,
                                          skb->len,
-                                         PCI_DMA_TODEVICE);
+                                         DMA_TO_DEVICE);
                         dev_kfree_skb_any(skb);
                         bf->bf_mpdu = NULL;
                 }
diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index 44931e42e2ba..ebf0467674cf 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -1715,9 +1715,8 @@ int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
         }
 
         /* allocate descriptors */
-        dd->dd_desc = pci_alloc_consistent(to_pci_dev(sc->dev),
-                              dd->dd_desc_len,
-                              &dd->dd_desc_paddr);
+        dd->dd_desc = dma_alloc_coherent(sc->dev, dd->dd_desc_len,
+                                         &dd->dd_desc_paddr, GFP_ATOMIC);
         if (dd->dd_desc == NULL) {
                 error = -ENOMEM;
                 goto fail;
@@ -1763,8 +1762,8 @@ int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
         }
         return 0;
 fail2:
-        pci_free_consistent(to_pci_dev(sc->dev),
-                dd->dd_desc_len, dd->dd_desc, dd->dd_desc_paddr);
+        dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc,
+                          dd->dd_desc_paddr);
 fail:
         memset(dd, 0, sizeof(*dd));
         return error;
@@ -1777,8 +1776,8 @@ void ath_descdma_cleanup(struct ath_softc *sc,
                          struct ath_descdma *dd,
                          struct list_head *head)
 {
-        pci_free_consistent(to_pci_dev(sc->dev),
-                dd->dd_desc_len, dd->dd_desc, dd->dd_desc_paddr);
+        dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc,
+                          dd->dd_desc_paddr);
 
         INIT_LIST_HEAD(head);
         kfree(dd->dd_bufptr);
diff --git a/drivers/net/wireless/ath9k/recv.c b/drivers/net/wireless/ath9k/recv.c
index 645fae2f49d8..648bb49e6734 100644
--- a/drivers/net/wireless/ath9k/recv.c
+++ b/drivers/net/wireless/ath9k/recv.c
@@ -291,16 +291,15 @@ int ath_rx_init(struct ath_softc *sc, int nbufs)
                         }
 
                         bf->bf_mpdu = skb;
-                        bf->bf_buf_addr = pci_map_single(to_pci_dev(sc->dev),
-                                                         skb->data,
+                        bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
                                                          sc->rx.bufsize,
-                                                         PCI_DMA_FROMDEVICE);
-                        if (unlikely(pci_dma_mapping_error(to_pci_dev(sc->dev),
+                                                         DMA_FROM_DEVICE);
+                        if (unlikely(dma_mapping_error(sc->dev,
                                   bf->bf_buf_addr))) {
                                 dev_kfree_skb_any(skb);
                                 bf->bf_mpdu = NULL;
                                 DPRINTF(sc, ATH_DBG_CONFIG,
-                                        "pci_dma_mapping_error() on RX init\n");
+                                        "dma_mapping_error() on RX init\n");
                                 error = -ENOMEM;
                                 break;
                         }
@@ -525,10 +524,9 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush)
                  * 1. accessing the frame
                  * 2. requeueing the same buffer to h/w
                  */
-                pci_dma_sync_single_for_cpu(to_pci_dev(sc->dev),
-                                bf->bf_buf_addr,
+                dma_sync_single_for_cpu(sc->dev, bf->bf_buf_addr,
                                 sc->rx.bufsize,
-                                PCI_DMA_FROMDEVICE);
+                                DMA_FROM_DEVICE);
 
                 /*
                  * If we're asked to flush receive queue, directly
@@ -559,9 +557,9 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush)
                         goto requeue;
 
                 /* Unmap the frame */
-                pci_unmap_single(to_pci_dev(sc->dev), bf->bf_buf_addr,
+                dma_unmap_single(sc->dev, bf->bf_buf_addr,
                                  sc->rx.bufsize,
-                                 PCI_DMA_FROMDEVICE);
+                                 DMA_FROM_DEVICE);
 
                 skb_put(skb, ds->ds_rxstat.rs_datalen);
                 skb->protocol = cpu_to_be16(ETH_P_CONTROL);
@@ -607,16 +605,15 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush)
 
                 /* We will now give hardware our shiny new allocated skb */
                 bf->bf_mpdu = requeue_skb;
-                bf->bf_buf_addr = pci_map_single(to_pci_dev(sc->dev),
-                                         requeue_skb->data,
+                bf->bf_buf_addr = dma_map_single(sc->dev, requeue_skb->data,
                                          sc->rx.bufsize,
-                                         PCI_DMA_FROMDEVICE);
-                if (unlikely(pci_dma_mapping_error(to_pci_dev(sc->dev),
+                                         DMA_FROM_DEVICE);
+                if (unlikely(dma_mapping_error(sc->dev,
                           bf->bf_buf_addr))) {
                         dev_kfree_skb_any(requeue_skb);
                         bf->bf_mpdu = NULL;
                         DPRINTF(sc, ATH_DBG_CONFIG,
-                                "pci_dma_mapping_error() on RX\n");
+                                "dma_mapping_error() on RX\n");
                         break;
                 }
                 bf->bf_dmacontext = bf->bf_buf_addr;
diff --git a/drivers/net/wireless/ath9k/xmit.c b/drivers/net/wireless/ath9k/xmit.c
index 27cb9d523f5f..522078d80931 100644
--- a/drivers/net/wireless/ath9k/xmit.c
+++ b/drivers/net/wireless/ath9k/xmit.c
@@ -340,10 +340,8 @@ static void ath_tx_complete_buf(struct ath_softc *sc,
         }
 
         /* Unmap this frame */
-        pci_unmap_single(to_pci_dev(sc->dev),
-                         bf->bf_dmacontext,
-                         skb->len,
-                         PCI_DMA_TODEVICE);
+        dma_unmap_single(sc->dev, bf->bf_dmacontext, skb->len, DMA_TO_DEVICE);
+
         /* complete this frame */
         ath_tx_complete(sc, skb, &tx_status);
 
@@ -1716,13 +1714,12 @@ static int ath_tx_setup_buffer(struct ath_softc *sc, struct ath_buf *bf,
         /* DMA setup */
         bf->bf_mpdu = skb;
 
-        bf->bf_dmacontext = pci_map_single(to_pci_dev(sc->dev), skb->data,
-                                           skb->len, PCI_DMA_TODEVICE);
-        if (unlikely(pci_dma_mapping_error(to_pci_dev(sc->dev),
-                                           bf->bf_dmacontext))) {
+        bf->bf_dmacontext = dma_map_single(sc->dev, skb->data,
+                                           skb->len, DMA_TO_DEVICE);
+        if (unlikely(dma_mapping_error(sc->dev, bf->bf_dmacontext))) {
                 bf->bf_mpdu = NULL;
                 DPRINTF(sc, ATH_DBG_CONFIG,
-                        "pci_dma_mapping_error() on TX\n");
+                        "dma_mapping_error() on TX\n");
                 return -ENOMEM;
         }