package/mac80211/patches/402-ath9k-convert-to-use-bus-agnostic-DMA-routines.patch

   1 From 4180ca5827fe3ac377a8a71fca955c99ad6a2b5b Mon Sep 17 00:00:00 2001
   2 From: Gabor Juhos <juhosg@openwrt.org>
   3 Date: Mon, 5 Jan 2009 10:50:30 +0100
   4 Subject: [PATCH v3 02/11] ath9k: convert to use bus-agnostic DMA routines
   5
   6 Convert to use bus-agnostic DMA routines to make it usable on AHB bus as well.
   7
   8 Changes-licensed-under: ISC
   9
  10 Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  11 Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
  12 ---
  13  drivers/net/wireless/ath9k/beacon.c |   31 ++++++++++++++-----------------
  14  drivers/net/wireless/ath9k/main.c   |   13 ++++++-------
  15  drivers/net/wireless/ath9k/recv.c   |   27 ++++++++++++---------------
  16  drivers/net/wireless/ath9k/xmit.c   |   15 ++++++---------
  17  4 files changed, 38 insertions(+), 48 deletions(-)
  18
  19 --- a/drivers/net/wireless/ath9k/beacon.c
  20 +++ b/drivers/net/wireless/ath9k/beacon.c
  21 @@ -164,9 +164,9 @@ static struct ath_buf *ath_beacon_genera
  22         bf = avp->av_bcbuf;
  23         skb = (struct sk_buff *)bf->bf_mpdu;
  24         if (skb) {
  25 -               pci_unmap_single(to_pci_dev(sc->dev), bf->bf_dmacontext,
  26 +               dma_unmap_single(sc->dev, bf->bf_dmacontext,
  27                                  skb->len,
  28 -                                PCI_DMA_TODEVICE);
  29 +                                DMA_TO_DEVICE);
  30                 dev_kfree_skb_any(skb);
  31         }
  32
  33 @@ -188,15 +188,14 @@ static struct ath_buf *ath_beacon_genera
  34         }
  35
  36         bf->bf_buf_addr = bf->bf_dmacontext =
  37 -               pci_map_single(to_pci_dev(sc->dev), skb->data,
  38 +               dma_map_single(sc->dev, skb->data,
  39                                skb->len,
  40 -                              PCI_DMA_TODEVICE);
  41 -       if (unlikely(pci_dma_mapping_error(to_pci_dev(sc->dev),
  42 -                                          bf->bf_buf_addr))) {
  43 +                              DMA_TO_DEVICE);
  44 +       if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
  45                 dev_kfree_skb_any(skb);
  46                 bf->bf_mpdu = NULL;
  47                 DPRINTF(sc, ATH_DBG_CONFIG,
  48 -                       "pci_dma_mapping_error() on beaconing\n");
  49 +                       "dma_mapping_error() on beaconing\n");
  50                 return NULL;
  51         }
  52
  53 @@ -344,9 +343,9 @@ int ath_beacon_alloc(struct ath_softc *s
  54         bf = avp->av_bcbuf;
  55         if (bf->bf_mpdu != NULL) {
  56                 skb = (struct sk_buff *)bf->bf_mpdu;
  57 -               pci_unmap_single(to_pci_dev(sc->dev), bf->bf_dmacontext,
  58 +               dma_unmap_single(sc->dev, bf->bf_dmacontext,
  59                                  skb->len,
  60 -                                PCI_DMA_TODEVICE);
  61 +                                DMA_TO_DEVICE);
  62                 dev_kfree_skb_any(skb);
  63                 bf->bf_mpdu = NULL;
  64         }
  65 @@ -403,15 +402,14 @@ int ath_beacon_alloc(struct ath_softc *s
  66
  67         bf->bf_mpdu = skb;
  68         bf->bf_buf_addr = bf->bf_dmacontext =
  69 -               pci_map_single(to_pci_dev(sc->dev), skb->data,
  70 +               dma_map_single(sc->dev, skb->data,
  71                                skb->len,
  72 -                              PCI_DMA_TODEVICE);
  73 -       if (unlikely(pci_dma_mapping_error(to_pci_dev(sc->dev),
  74 -                                          bf->bf_buf_addr))) {
  75 +                              DMA_TO_DEVICE);
  76 +       if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
  77                 dev_kfree_skb_any(skb);
  78                 bf->bf_mpdu = NULL;
  79                 DPRINTF(sc, ATH_DBG_CONFIG,
  80 -                       "pci_dma_mapping_error() on beacon alloc\n");
  81 +                       "dma_mapping_error() on beacon alloc\n");
  82                 return -ENOMEM;
  83         }
  84
  85 @@ -431,10 +429,9 @@ void ath_beacon_return(struct ath_softc
  86                 bf = avp->av_bcbuf;
  87                 if (bf->bf_mpdu != NULL) {
  88                         struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu;
  89 -                       pci_unmap_single(to_pci_dev(sc->dev),
  90 -                                        bf->bf_dmacontext,
  91 +                       dma_unmap_single(sc->dev, bf->bf_dmacontext,
  92                                          skb->len,
  93 -                                        PCI_DMA_TODEVICE);
  94 +                                        DMA_TO_DEVICE);
  95                         dev_kfree_skb_any(skb);
  96                         bf->bf_mpdu = NULL;
  97                 }
  98 --- a/drivers/net/wireless/ath9k/main.c
  99 +++ b/drivers/net/wireless/ath9k/main.c
 100 @@ -1717,9 +1717,8 @@ int ath_descdma_setup(struct ath_softc *
 101         }
 102
 103         /* allocate descriptors */
 104 -       dd->dd_desc = pci_alloc_consistent(to_pci_dev(sc->dev),
 105 -                             dd->dd_desc_len,
 106 -                             &dd->dd_desc_paddr);
 107 +       dd->dd_desc = dma_alloc_coherent(sc->dev, dd->dd_desc_len,
 108 +                                        &dd->dd_desc_paddr, GFP_ATOMIC);
 109         if (dd->dd_desc == NULL) {
 110                 error = -ENOMEM;
 111                 goto fail;
 112 @@ -1765,8 +1764,8 @@ int ath_descdma_setup(struct ath_softc *
 113         }
 114         return 0;
 115  fail2:
 116 -       pci_free_consistent(to_pci_dev(sc->dev),
 117 -               dd->dd_desc_len, dd->dd_desc, dd->dd_desc_paddr);
 118 +       dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc,
 119 +                         dd->dd_desc_paddr);
 120  fail:
 121         memset(dd, 0, sizeof(*dd));
 122         return error;
 123 @@ -1779,8 +1778,8 @@ void ath_descdma_cleanup(struct ath_soft
 124                          struct ath_descdma *dd,
 125                          struct list_head *head)
 126  {
 127 -       pci_free_consistent(to_pci_dev(sc->dev),
 128 -               dd->dd_desc_len, dd->dd_desc, dd->dd_desc_paddr);
 129 +       dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc,
 130 +                         dd->dd_desc_paddr);
 131
 132         INIT_LIST_HEAD(head);
 133         kfree(dd->dd_bufptr);
 134 --- a/drivers/net/wireless/ath9k/recv.c
 135 +++ b/drivers/net/wireless/ath9k/recv.c
 136 @@ -291,16 +291,15 @@ int ath_rx_init(struct ath_softc *sc, in
 137                         }
 138
 139                         bf->bf_mpdu = skb;
 140 -                       bf->bf_buf_addr = pci_map_single(to_pci_dev(sc->dev),
 141 -                                                        skb->data,
 142 +                       bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
 143                                                          sc->rx.bufsize,
 144 -                                                        PCI_DMA_FROMDEVICE);
 145 -                       if (unlikely(pci_dma_mapping_error(to_pci_dev(sc->dev),
 146 +                                                        DMA_FROM_DEVICE);
 147 +                       if (unlikely(dma_mapping_error(sc->dev,
 148                                   bf->bf_buf_addr))) {
 149                                 dev_kfree_skb_any(skb);
 150                                 bf->bf_mpdu = NULL;
 151                                 DPRINTF(sc, ATH_DBG_CONFIG,
 152 -                                       "pci_dma_mapping_error() on RX init\n");
 153 +                                       "dma_mapping_error() on RX init\n");
 154                                 error = -ENOMEM;
 155                                 break;
 156                         }
 157 @@ -525,10 +524,9 @@ int ath_rx_tasklet(struct ath_softc *sc,
 158                  * 1. accessing the frame
 159                  * 2. requeueing the same buffer to h/w
 160                  */
 161 -               pci_dma_sync_single_for_cpu(to_pci_dev(sc->dev),
 162 -                               bf->bf_buf_addr,
 163 +               dma_sync_single_for_cpu(sc->dev, bf->bf_buf_addr,
 164                                 sc->rx.bufsize,
 165 -                               PCI_DMA_FROMDEVICE);
 166 +                               DMA_FROM_DEVICE);
 167
 168                 /*
 169                  * If we're asked to flush receive queue, directly
 170 @@ -559,9 +557,9 @@ int ath_rx_tasklet(struct ath_softc *sc,
 171                         goto requeue;
 172
 173                 /* Unmap the frame */
 174 -               pci_unmap_single(to_pci_dev(sc->dev), bf->bf_buf_addr,
 175 +               dma_unmap_single(sc->dev, bf->bf_buf_addr,
 176                                  sc->rx.bufsize,
 177 -                                PCI_DMA_FROMDEVICE);
 178 +                                DMA_FROM_DEVICE);
 179
 180                 skb_put(skb, ds->ds_rxstat.rs_datalen);
 181                 skb->protocol = cpu_to_be16(ETH_P_CONTROL);
 182 @@ -607,16 +605,15 @@ int ath_rx_tasklet(struct ath_softc *sc,
 183
 184                 /* We will now give hardware our shiny new allocated skb */
 185                 bf->bf_mpdu = requeue_skb;
 186 -               bf->bf_buf_addr = pci_map_single(to_pci_dev(sc->dev),
 187 -                                        requeue_skb->data,
 188 +               bf->bf_buf_addr = dma_map_single(sc->dev, requeue_skb->data,
 189                                          sc->rx.bufsize,
 190 -                                        PCI_DMA_FROMDEVICE);
 191 -               if (unlikely(pci_dma_mapping_error(to_pci_dev(sc->dev),
 192 +                                        DMA_FROM_DEVICE);
 193 +               if (unlikely(dma_mapping_error(sc->dev,
 194                           bf->bf_buf_addr))) {
 195                         dev_kfree_skb_any(requeue_skb);
 196                         bf->bf_mpdu = NULL;
 197                         DPRINTF(sc, ATH_DBG_CONFIG,
 198 -                               "pci_dma_mapping_error() on RX\n");
 199 +                               "dma_mapping_error() on RX\n");
 200                         break;
 201                 }
 202                 bf->bf_dmacontext = bf->bf_buf_addr;
 203 --- a/drivers/net/wireless/ath9k/xmit.c
 204 +++ b/drivers/net/wireless/ath9k/xmit.c
 205 @@ -340,10 +340,8 @@ static void ath_tx_complete_buf(struct a
 206         }
 207
 208         /* Unmap this frame */
 209 -       pci_unmap_single(to_pci_dev(sc->dev),
 210 -                        bf->bf_dmacontext,
 211 -                        skb->len,
 212 -                        PCI_DMA_TODEVICE);
 213 +       dma_unmap_single(sc->dev, bf->bf_dmacontext, skb->len, DMA_TO_DEVICE);
 214 +
 215         /* complete this frame */
 216         ath_tx_complete(sc, skb, &tx_status);
 217
 218 @@ -1716,13 +1714,12 @@ static int ath_tx_setup_buffer(struct at
 219         /* DMA setup */
 220         bf->bf_mpdu = skb;
 221
 222 -       bf->bf_dmacontext = pci_map_single(to_pci_dev(sc->dev), skb->data,
 223 -                                          skb->len, PCI_DMA_TODEVICE);
 224 -       if (unlikely(pci_dma_mapping_error(to_pci_dev(sc->dev),
 225 -                                          bf->bf_dmacontext))) {
 226 +       bf->bf_dmacontext = dma_map_single(sc->dev, skb->data,
 227 +                                          skb->len, DMA_TO_DEVICE);
 228 +       if (unlikely(dma_mapping_error(sc->dev, bf->bf_dmacontext))) {
 229                 bf->bf_mpdu = NULL;
 230                 DPRINTF(sc, ATH_DBG_CONFIG,
 231 -                       "pci_dma_mapping_error() on TX\n");
 232 +                       "dma_mapping_error() on TX\n");
 233                 return -ENOMEM;
 234         }
 235