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b44: replace the ssb_dma API with the generic DMA API
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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>
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FUJITA Tomonori authored and John W. Linville committed Jun 4, 2010
1 parent 718e889 commit 39a6f4b
Showing 1 changed file with 70 additions and 74 deletions.
144 changes: 70 additions & 74 deletions drivers/net/b44.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -150,19 +150,17 @@ 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,
dma_addr_t dma_base,
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)
Expand Down Expand Up @@ -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);
}
Expand Down Expand Up @@ -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;
}
Expand Down Expand Up @@ -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)
Expand All @@ -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)) ||
Expand Down Expand Up @@ -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);
Expand Down Expand Up @@ -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;
Expand Down Expand Up @@ -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;
}
Expand All @@ -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;
}
Expand All @@ -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)
Expand All @@ -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;
}
Expand All @@ -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
Expand All @@ -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;
Expand All @@ -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
Expand All @@ -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;
Expand Down Expand Up @@ -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,
Expand Down

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