b44: replace the ssb_dma API with the generic DMA API

Note that dma_sync_single_for_device and dma_sync_single_for_cpu support a
partial sync.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Gary Zambrano <zambrano@broadcom.com>
Acked-by: Michael Buesch <mb@bu3sch.de>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/b44.c b/drivers/net/b44.c
index 293f9c1..3d52538 100644 (file)
--- a/drivers/net/b44.c
+++ b/drivers/net/b44.c
@@ -150,9 +150,8 @@ static inline void b44_sync_dma_desc_for_device(struct ssb_device *sdev,
                                                unsigned long offset,
                                                enum dma_data_direction dir)
 {
-       ssb_dma_sync_single_range_for_device(sdev, dma_base,
-                                            offset & dma_desc_align_mask,
-                                            dma_desc_sync_size, dir);
+       dma_sync_single_for_device(sdev->dma_dev, dma_base + offset,
+                                  dma_desc_sync_size, dir);
 }
 
 static inline void b44_sync_dma_desc_for_cpu(struct ssb_device *sdev,
@@ -160,9 +159,8 @@ static inline void b44_sync_dma_desc_for_cpu(struct ssb_device *sdev,
                                             unsigned long offset,
                                             enum dma_data_direction dir)
 {
-       ssb_dma_sync_single_range_for_cpu(sdev, dma_base,
-                                         offset & dma_desc_align_mask,
-                                         dma_desc_sync_size, dir);
+       dma_sync_single_for_cpu(sdev->dma_dev, dma_base + offset,
+                               dma_desc_sync_size, dir);
 }
 
 static inline unsigned long br32(const struct b44 *bp, unsigned long reg)
@@ -608,10 +606,10 @@ static void b44_tx(struct b44 *bp)
 
                BUG_ON(skb == NULL);
 
-               ssb_dma_unmap_single(bp->sdev,
-                                    rp->mapping,
-                                    skb->len,
-                                    DMA_TO_DEVICE);
+               dma_unmap_single(bp->sdev->dma_dev,
+                                rp->mapping,
+                                skb->len,
+                                DMA_TO_DEVICE);
                rp->skb = NULL;
                dev_kfree_skb_irq(skb);
        }
@@ -648,29 +646,29 @@ static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
        if (skb == NULL)
                return -ENOMEM;
 
-       mapping = ssb_dma_map_single(bp->sdev, skb->data,
-                                    RX_PKT_BUF_SZ,
-                                    DMA_FROM_DEVICE);
+       mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
+                                RX_PKT_BUF_SZ,
+                                DMA_FROM_DEVICE);
 
        /* Hardware bug work-around, the chip is unable to do PCI DMA
           to/from anything above 1GB :-( */
-       if (ssb_dma_mapping_error(bp->sdev, mapping) ||
+       if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
                mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) {
                /* Sigh... */
-               if (!ssb_dma_mapping_error(bp->sdev, mapping))
-                       ssb_dma_unmap_single(bp->sdev, mapping,
+               if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
+                       dma_unmap_single(bp->sdev->dma_dev, mapping,
                                             RX_PKT_BUF_SZ, DMA_FROM_DEVICE);
                dev_kfree_skb_any(skb);
                skb = __netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ, GFP_ATOMIC|GFP_DMA);
                if (skb == NULL)
                        return -ENOMEM;
-               mapping = ssb_dma_map_single(bp->sdev, skb->data,
-                                            RX_PKT_BUF_SZ,
-                                            DMA_FROM_DEVICE);
-               if (ssb_dma_mapping_error(bp->sdev, mapping) ||
-                       mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) {
-                       if (!ssb_dma_mapping_error(bp->sdev, mapping))
-                               ssb_dma_unmap_single(bp->sdev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
+               mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
+                                        RX_PKT_BUF_SZ,
+                                        DMA_FROM_DEVICE);
+               if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
+                   mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) {
+                       if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
+                               dma_unmap_single(bp->sdev->dma_dev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
                        dev_kfree_skb_any(skb);
                        return -ENOMEM;
                }
@@ -745,9 +743,9 @@ static void b44_recycle_rx(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
                                             dest_idx * sizeof(*dest_desc),
                                             DMA_BIDIRECTIONAL);
 
-       ssb_dma_sync_single_for_device(bp->sdev, dest_map->mapping,
-                                      RX_PKT_BUF_SZ,
-                                      DMA_FROM_DEVICE);
+       dma_sync_single_for_device(bp->sdev->dma_dev, dest_map->mapping,
+                                  RX_PKT_BUF_SZ,
+                                  DMA_FROM_DEVICE);
 }
 
 static int b44_rx(struct b44 *bp, int budget)
@@ -767,9 +765,9 @@ static int b44_rx(struct b44 *bp, int budget)
                struct rx_header *rh;
                u16 len;
 
-               ssb_dma_sync_single_for_cpu(bp->sdev, map,
-                                           RX_PKT_BUF_SZ,
-                                           DMA_FROM_DEVICE);
+               dma_sync_single_for_cpu(bp->sdev->dma_dev, map,
+                                       RX_PKT_BUF_SZ,
+                                       DMA_FROM_DEVICE);
                rh = (struct rx_header *) skb->data;
                len = le16_to_cpu(rh->len);
                if ((len > (RX_PKT_BUF_SZ - RX_PKT_OFFSET)) ||
@@ -801,8 +799,8 @@ static int b44_rx(struct b44 *bp, int budget)
                        skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod);
                        if (skb_size < 0)
                                goto drop_it;
-                       ssb_dma_unmap_single(bp->sdev, map,
-                                            skb_size, DMA_FROM_DEVICE);
+                       dma_unmap_single(bp->sdev->dma_dev, map,
+                                        skb_size, DMA_FROM_DEVICE);
                        /* Leave out rx_header */
                        skb_put(skb, len + RX_PKT_OFFSET);
                        skb_pull(skb, RX_PKT_OFFSET);
@@ -954,24 +952,24 @@ static netdev_tx_t b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
                goto err_out;
        }
 
-       mapping = ssb_dma_map_single(bp->sdev, skb->data, len, DMA_TO_DEVICE);
-       if (ssb_dma_mapping_error(bp->sdev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
+       mapping = dma_map_single(bp->sdev->dma_dev, skb->data, len, DMA_TO_DEVICE);
+       if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
                struct sk_buff *bounce_skb;
 
                /* Chip can't handle DMA to/from >1GB, use bounce buffer */
-               if (!ssb_dma_mapping_error(bp->sdev, mapping))
-                       ssb_dma_unmap_single(bp->sdev, mapping, len,
+               if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
+                       dma_unmap_single(bp->sdev->dma_dev, mapping, len,
                                             DMA_TO_DEVICE);
 
                bounce_skb = __netdev_alloc_skb(dev, len, GFP_ATOMIC | GFP_DMA);
                if (!bounce_skb)
                        goto err_out;
 
-               mapping = ssb_dma_map_single(bp->sdev, bounce_skb->data,
-                                            len, DMA_TO_DEVICE);
-               if (ssb_dma_mapping_error(bp->sdev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
-                       if (!ssb_dma_mapping_error(bp->sdev, mapping))
-                               ssb_dma_unmap_single(bp->sdev, mapping,
+               mapping = dma_map_single(bp->sdev->dma_dev, bounce_skb->data,
+                                        len, DMA_TO_DEVICE);
+               if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
+                       if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
+                               dma_unmap_single(bp->sdev->dma_dev, mapping,
                                                     len, DMA_TO_DEVICE);
                        dev_kfree_skb_any(bounce_skb);
                        goto err_out;
@@ -1068,8 +1066,8 @@ static void b44_free_rings(struct b44 *bp)
 
                if (rp->skb == NULL)
                        continue;
-               ssb_dma_unmap_single(bp->sdev, rp->mapping, RX_PKT_BUF_SZ,
-                                    DMA_FROM_DEVICE);
+               dma_unmap_single(bp->sdev->dma_dev, rp->mapping, RX_PKT_BUF_SZ,
+                                DMA_FROM_DEVICE);
                dev_kfree_skb_any(rp->skb);
                rp->skb = NULL;
        }
@@ -1080,8 +1078,8 @@ static void b44_free_rings(struct b44 *bp)
 
                if (rp->skb == NULL)
                        continue;
-               ssb_dma_unmap_single(bp->sdev, rp->mapping, rp->skb->len,
-                                    DMA_TO_DEVICE);
+               dma_unmap_single(bp->sdev->dma_dev, rp->mapping, rp->skb->len,
+                                DMA_TO_DEVICE);
                dev_kfree_skb_any(rp->skb);
                rp->skb = NULL;
        }
@@ -1103,14 +1101,12 @@ static void b44_init_rings(struct b44 *bp)
        memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
 
        if (bp->flags & B44_FLAG_RX_RING_HACK)
-               ssb_dma_sync_single_for_device(bp->sdev, bp->rx_ring_dma,
-                                              DMA_TABLE_BYTES,
-                                              DMA_BIDIRECTIONAL);
+               dma_sync_single_for_device(bp->sdev->dma_dev, bp->rx_ring_dma,
+                                          DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
 
        if (bp->flags & B44_FLAG_TX_RING_HACK)
-               ssb_dma_sync_single_for_device(bp->sdev, bp->tx_ring_dma,
-                                              DMA_TABLE_BYTES,
-                                              DMA_TO_DEVICE);
+               dma_sync_single_for_device(bp->sdev->dma_dev, bp->tx_ring_dma,
+                                          DMA_TABLE_BYTES, DMA_TO_DEVICE);
 
        for (i = 0; i < bp->rx_pending; i++) {
                if (b44_alloc_rx_skb(bp, -1, i) < 0)
@@ -1130,27 +1126,23 @@ static void b44_free_consistent(struct b44 *bp)
        bp->tx_buffers = NULL;
        if (bp->rx_ring) {
                if (bp->flags & B44_FLAG_RX_RING_HACK) {
-                       ssb_dma_unmap_single(bp->sdev, bp->rx_ring_dma,
-                                            DMA_TABLE_BYTES,
-                                            DMA_BIDIRECTIONAL);
+                       dma_unmap_single(bp->sdev->dma_dev, bp->rx_ring_dma,
+                                        DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
                        kfree(bp->rx_ring);
                } else
-                       ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
-                                               bp->rx_ring, bp->rx_ring_dma,
-                                               GFP_KERNEL);
+                       dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
+                                         bp->rx_ring, bp->rx_ring_dma);
                bp->rx_ring = NULL;
                bp->flags &= ~B44_FLAG_RX_RING_HACK;
        }
        if (bp->tx_ring) {
                if (bp->flags & B44_FLAG_TX_RING_HACK) {
-                       ssb_dma_unmap_single(bp->sdev, bp->tx_ring_dma,
-                                            DMA_TABLE_BYTES,
-                                            DMA_TO_DEVICE);
+                       dma_unmap_single(bp->sdev->dma_dev, bp->tx_ring_dma,
+                                        DMA_TABLE_BYTES, DMA_TO_DEVICE);
                        kfree(bp->tx_ring);
                } else
-                       ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
-                                               bp->tx_ring, bp->tx_ring_dma,
-                                               GFP_KERNEL);
+                       dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
+                                         bp->tx_ring, bp->tx_ring_dma);
                bp->tx_ring = NULL;
                bp->flags &= ~B44_FLAG_TX_RING_HACK;
        }
@@ -1175,7 +1167,8 @@ static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
                goto out_err;
 
        size = DMA_TABLE_BYTES;
-       bp->rx_ring = ssb_dma_alloc_consistent(bp->sdev, size, &bp->rx_ring_dma, gfp);
+       bp->rx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
+                                        &bp->rx_ring_dma, gfp);
        if (!bp->rx_ring) {
                /* Allocation may have failed due to pci_alloc_consistent
                   insisting on use of GFP_DMA, which is more restrictive
@@ -1187,11 +1180,11 @@ static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
                if (!rx_ring)
                        goto out_err;
 
-               rx_ring_dma = ssb_dma_map_single(bp->sdev, rx_ring,
-                                                DMA_TABLE_BYTES,
-                                                DMA_BIDIRECTIONAL);
+               rx_ring_dma = dma_map_single(bp->sdev->dma_dev, rx_ring,
+                                            DMA_TABLE_BYTES,
+                                            DMA_BIDIRECTIONAL);
 
-               if (ssb_dma_mapping_error(bp->sdev, rx_ring_dma) ||
+               if (dma_mapping_error(bp->sdev->dma_dev, rx_ring_dma) ||
                        rx_ring_dma + size > DMA_BIT_MASK(30)) {
                        kfree(rx_ring);
                        goto out_err;
@@ -1202,7 +1195,8 @@ static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
                bp->flags |= B44_FLAG_RX_RING_HACK;
        }
 
-       bp->tx_ring = ssb_dma_alloc_consistent(bp->sdev, size, &bp->tx_ring_dma, gfp);
+       bp->tx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
+                                        &bp->tx_ring_dma, gfp);
        if (!bp->tx_ring) {
                /* Allocation may have failed due to ssb_dma_alloc_consistent
                   insisting on use of GFP_DMA, which is more restrictive
@@ -1214,11 +1208,11 @@ static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
                if (!tx_ring)
                        goto out_err;
 
-               tx_ring_dma = ssb_dma_map_single(bp->sdev, tx_ring,
-                                           DMA_TABLE_BYTES,
-                                           DMA_TO_DEVICE);
+               tx_ring_dma = dma_map_single(bp->sdev->dma_dev, tx_ring,
+                                            DMA_TABLE_BYTES,
+                                            DMA_TO_DEVICE);
 
-               if (ssb_dma_mapping_error(bp->sdev, tx_ring_dma) ||
+               if (dma_mapping_error(bp->sdev->dma_dev, tx_ring_dma) ||
                        tx_ring_dma + size > DMA_BIT_MASK(30)) {
                        kfree(tx_ring);
                        goto out_err;
@@ -2176,12 +2170,14 @@ static int __devinit b44_init_one(struct ssb_device *sdev,
                        "Failed to powerup the bus\n");
                goto err_out_free_dev;
        }
-       err = ssb_dma_set_mask(sdev, DMA_BIT_MASK(30));
-       if (err) {
+
+       if (dma_set_mask(sdev->dma_dev, DMA_BIT_MASK(30)) ||
+           dma_set_coherent_mask(sdev->dma_dev, DMA_BIT_MASK(30))) {
                dev_err(sdev->dev,
                        "Required 30BIT DMA mask unsupported by the system\n");
                goto err_out_powerdown;
        }
+
        err = b44_get_invariants(bp);
        if (err) {
                dev_err(sdev->dev,