ssb, b43, b43legacy, b44: Rewrite SSB DMA API
This is a rewrite of the DMA API for SSB devices.
This is needed, because the old (non-existing) "API" made too many bad
assumptions on the API of the host-bus (PCI).
This introduces an almost complete SSB-DMA-API that maps to the lowlevel
bus-API based on the bustype.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/b44.c b/drivers/net/b44.c
index 59dce6a..c3bda5c 100644
--- a/drivers/net/b44.c
+++ b/drivers/net/b44.c
@@ -148,9 +148,9 @@
unsigned long offset,
enum dma_data_direction dir)
{
- dma_sync_single_range_for_device(sdev->dma_dev, dma_base,
- offset & dma_desc_align_mask,
- dma_desc_sync_size, dir);
+ ssb_dma_sync_single_range_for_device(sdev, dma_base,
+ offset & dma_desc_align_mask,
+ dma_desc_sync_size, dir);
}
static inline void b44_sync_dma_desc_for_cpu(struct ssb_device *sdev,
@@ -158,9 +158,9 @@
unsigned long offset,
enum dma_data_direction dir)
{
- dma_sync_single_range_for_cpu(sdev->dma_dev, dma_base,
- offset & dma_desc_align_mask,
- dma_desc_sync_size, dir);
+ ssb_dma_sync_single_range_for_cpu(sdev, dma_base,
+ offset & dma_desc_align_mask,
+ dma_desc_sync_size, dir);
}
static inline unsigned long br32(const struct b44 *bp, unsigned long reg)
@@ -613,10 +613,10 @@
BUG_ON(skb == NULL);
- dma_unmap_single(bp->sdev->dma_dev,
- rp->mapping,
- skb->len,
- DMA_TO_DEVICE);
+ ssb_dma_unmap_single(bp->sdev,
+ rp->mapping,
+ skb->len,
+ DMA_TO_DEVICE);
rp->skb = NULL;
dev_kfree_skb_irq(skb);
}
@@ -653,29 +653,29 @@
if (skb == NULL)
return -ENOMEM;
- mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
- RX_PKT_BUF_SZ,
- DMA_FROM_DEVICE);
+ mapping = ssb_dma_map_single(bp->sdev, 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 (dma_mapping_error(mapping) ||
+ if (ssb_dma_mapping_error(bp->sdev, mapping) ||
mapping + RX_PKT_BUF_SZ > DMA_30BIT_MASK) {
/* Sigh... */
- if (!dma_mapping_error(mapping))
- dma_unmap_single(bp->sdev->dma_dev, mapping,
- RX_PKT_BUF_SZ, DMA_FROM_DEVICE);
+ if (!ssb_dma_mapping_error(bp->sdev, mapping))
+ ssb_dma_unmap_single(bp->sdev, 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 = dma_map_single(bp->sdev->dma_dev, skb->data,
- RX_PKT_BUF_SZ,
- DMA_FROM_DEVICE);
- if (dma_mapping_error(mapping) ||
+ 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_30BIT_MASK) {
- if (!dma_mapping_error(mapping))
- dma_unmap_single(bp->sdev->dma_dev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
+ if (!ssb_dma_mapping_error(bp->sdev, mapping))
+ ssb_dma_unmap_single(bp->sdev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
dev_kfree_skb_any(skb);
return -ENOMEM;
}
@@ -750,9 +750,9 @@
dest_idx * sizeof(dest_desc),
DMA_BIDIRECTIONAL);
- dma_sync_single_for_device(bp->sdev->dma_dev, le32_to_cpu(src_desc->addr),
- RX_PKT_BUF_SZ,
- DMA_FROM_DEVICE);
+ ssb_dma_sync_single_for_device(bp->sdev, le32_to_cpu(src_desc->addr),
+ RX_PKT_BUF_SZ,
+ DMA_FROM_DEVICE);
}
static int b44_rx(struct b44 *bp, int budget)
@@ -772,7 +772,7 @@
struct rx_header *rh;
u16 len;
- dma_sync_single_for_cpu(bp->sdev->dma_dev, map,
+ ssb_dma_sync_single_for_cpu(bp->sdev, map,
RX_PKT_BUF_SZ,
DMA_FROM_DEVICE);
rh = (struct rx_header *) skb->data;
@@ -806,8 +806,8 @@
skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod);
if (skb_size < 0)
goto drop_it;
- dma_unmap_single(bp->sdev->dma_dev, map,
- skb_size, DMA_FROM_DEVICE);
+ ssb_dma_unmap_single(bp->sdev, map,
+ skb_size, DMA_FROM_DEVICE);
/* Leave out rx_header */
skb_put(skb, len + RX_PKT_OFFSET);
skb_pull(skb, RX_PKT_OFFSET);
@@ -966,25 +966,25 @@
goto err_out;
}
- mapping = dma_map_single(bp->sdev->dma_dev, skb->data, len, DMA_TO_DEVICE);
- if (dma_mapping_error(mapping) || mapping + len > DMA_30BIT_MASK) {
+ mapping = ssb_dma_map_single(bp->sdev, skb->data, len, DMA_TO_DEVICE);
+ if (ssb_dma_mapping_error(bp->sdev, mapping) || mapping + len > DMA_30BIT_MASK) {
struct sk_buff *bounce_skb;
/* Chip can't handle DMA to/from >1GB, use bounce buffer */
- if (!dma_mapping_error(mapping))
- dma_unmap_single(bp->sdev->dma_dev, mapping, len,
- DMA_TO_DEVICE);
+ if (!ssb_dma_mapping_error(bp->sdev, mapping))
+ ssb_dma_unmap_single(bp->sdev, mapping, len,
+ DMA_TO_DEVICE);
bounce_skb = __dev_alloc_skb(len, GFP_ATOMIC | GFP_DMA);
if (!bounce_skb)
goto err_out;
- mapping = dma_map_single(bp->sdev->dma_dev, bounce_skb->data,
- len, DMA_TO_DEVICE);
- if (dma_mapping_error(mapping) || mapping + len > DMA_30BIT_MASK) {
- if (!dma_mapping_error(mapping))
- dma_unmap_single(bp->sdev->dma_dev, mapping,
- len, DMA_TO_DEVICE);
+ 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_30BIT_MASK) {
+ if (!ssb_dma_mapping_error(bp->sdev, mapping))
+ ssb_dma_unmap_single(bp->sdev, mapping,
+ len, DMA_TO_DEVICE);
dev_kfree_skb_any(bounce_skb);
goto err_out;
}
@@ -1082,8 +1082,8 @@
if (rp->skb == NULL)
continue;
- dma_unmap_single(bp->sdev->dma_dev, rp->mapping, RX_PKT_BUF_SZ,
- DMA_FROM_DEVICE);
+ ssb_dma_unmap_single(bp->sdev, rp->mapping, RX_PKT_BUF_SZ,
+ DMA_FROM_DEVICE);
dev_kfree_skb_any(rp->skb);
rp->skb = NULL;
}
@@ -1094,8 +1094,8 @@
if (rp->skb == NULL)
continue;
- dma_unmap_single(bp->sdev->dma_dev, rp->mapping, rp->skb->len,
- DMA_TO_DEVICE);
+ ssb_dma_unmap_single(bp->sdev, rp->mapping, rp->skb->len,
+ DMA_TO_DEVICE);
dev_kfree_skb_any(rp->skb);
rp->skb = NULL;
}
@@ -1117,14 +1117,14 @@
memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
if (bp->flags & B44_FLAG_RX_RING_HACK)
- dma_sync_single_for_device(bp->sdev->dma_dev, bp->rx_ring_dma,
- DMA_TABLE_BYTES,
- DMA_BIDIRECTIONAL);
+ ssb_dma_sync_single_for_device(bp->sdev, bp->rx_ring_dma,
+ DMA_TABLE_BYTES,
+ DMA_BIDIRECTIONAL);
if (bp->flags & B44_FLAG_TX_RING_HACK)
- dma_sync_single_for_device(bp->sdev->dma_dev, bp->tx_ring_dma,
- DMA_TABLE_BYTES,
- DMA_TO_DEVICE);
+ ssb_dma_sync_single_for_device(bp->sdev, 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)
@@ -1144,25 +1144,27 @@
bp->tx_buffers = NULL;
if (bp->rx_ring) {
if (bp->flags & B44_FLAG_RX_RING_HACK) {
- dma_unmap_single(bp->sdev->dma_dev, bp->rx_ring_dma,
- DMA_TABLE_BYTES,
- DMA_BIDIRECTIONAL);
+ ssb_dma_unmap_single(bp->sdev, bp->rx_ring_dma,
+ DMA_TABLE_BYTES,
+ DMA_BIDIRECTIONAL);
kfree(bp->rx_ring);
} else
- dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
- bp->rx_ring, bp->rx_ring_dma);
+ ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
+ bp->rx_ring, bp->rx_ring_dma,
+ GFP_KERNEL);
bp->rx_ring = NULL;
bp->flags &= ~B44_FLAG_RX_RING_HACK;
}
if (bp->tx_ring) {
if (bp->flags & B44_FLAG_TX_RING_HACK) {
- dma_unmap_single(bp->sdev->dma_dev, bp->tx_ring_dma,
- DMA_TABLE_BYTES,
- DMA_TO_DEVICE);
+ ssb_dma_unmap_single(bp->sdev, bp->tx_ring_dma,
+ DMA_TABLE_BYTES,
+ DMA_TO_DEVICE);
kfree(bp->tx_ring);
} else
- dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
- bp->tx_ring, bp->tx_ring_dma);
+ ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
+ bp->tx_ring, bp->tx_ring_dma,
+ GFP_KERNEL);
bp->tx_ring = NULL;
bp->flags &= ~B44_FLAG_TX_RING_HACK;
}
@@ -1187,7 +1189,7 @@
goto out_err;
size = DMA_TABLE_BYTES;
- bp->rx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size, &bp->rx_ring_dma, gfp);
+ bp->rx_ring = ssb_dma_alloc_consistent(bp->sdev, 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
@@ -1199,11 +1201,11 @@
if (!rx_ring)
goto out_err;
- rx_ring_dma = dma_map_single(bp->sdev->dma_dev, rx_ring,
- DMA_TABLE_BYTES,
- DMA_BIDIRECTIONAL);
+ rx_ring_dma = ssb_dma_map_single(bp->sdev, rx_ring,
+ DMA_TABLE_BYTES,
+ DMA_BIDIRECTIONAL);
- if (dma_mapping_error(rx_ring_dma) ||
+ if (ssb_dma_mapping_error(bp->sdev, rx_ring_dma) ||
rx_ring_dma + size > DMA_30BIT_MASK) {
kfree(rx_ring);
goto out_err;
@@ -1214,9 +1216,9 @@
bp->flags |= B44_FLAG_RX_RING_HACK;
}
- bp->tx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size, &bp->tx_ring_dma, gfp);
+ bp->tx_ring = ssb_dma_alloc_consistent(bp->sdev, size, &bp->tx_ring_dma, gfp);
if (!bp->tx_ring) {
- /* Allocation may have failed due to dma_alloc_coherent
+ /* Allocation may have failed due to ssb_dma_alloc_consistent
insisting on use of GFP_DMA, which is more restrictive
than necessary... */
struct dma_desc *tx_ring;
@@ -1226,11 +1228,11 @@
if (!tx_ring)
goto out_err;
- tx_ring_dma = dma_map_single(bp->sdev->dma_dev, tx_ring,
+ tx_ring_dma = ssb_dma_map_single(bp->sdev, tx_ring,
DMA_TABLE_BYTES,
DMA_TO_DEVICE);
- if (dma_mapping_error(tx_ring_dma) ||
+ if (ssb_dma_mapping_error(bp->sdev, tx_ring_dma) ||
tx_ring_dma + size > DMA_30BIT_MASK) {
kfree(tx_ring);
goto out_err;