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ssb, b43, b43legacy, b44: Rewrite SSB DMA API

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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>
This commit is contained in:
Michael Buesch
2008-06-20 11:50:29 +02:00
committed by John W. Linville
parent 316af76f34
commit f225763a7d
6 changed files with 336 additions and 152 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
drivers/net/wireless/b43/dma.c
View File

@@ -328,11 +328,11 @@ static inline
dma_addr_t dmaaddr;
if (tx) {
dmaaddr = dma_map_single(ring->dev->dev->dma_dev,
buf, len, DMA_TO_DEVICE);
dmaaddr = ssb_dma_map_single(ring->dev->dev,
buf, len, DMA_TO_DEVICE);
} else {
dmaaddr = dma_map_single(ring->dev->dev->dma_dev,
buf, len, DMA_FROM_DEVICE);
dmaaddr = ssb_dma_map_single(ring->dev->dev,
buf, len, DMA_FROM_DEVICE);
}
return dmaaddr;
@@ -343,11 +343,11 @@ static inline
dma_addr_t addr, size_t len, int tx)
{
if (tx) {
dma_unmap_single(ring->dev->dev->dma_dev,
addr, len, DMA_TO_DEVICE);
ssb_dma_unmap_single(ring->dev->dev,
addr, len, DMA_TO_DEVICE);
} else {
dma_unmap_single(ring->dev->dev->dma_dev,
addr, len, DMA_FROM_DEVICE);
ssb_dma_unmap_single(ring->dev->dev,
addr, len, DMA_FROM_DEVICE);
}
}
@@ -356,8 +356,8 @@ static inline
dma_addr_t addr, size_t len)
{
B43_WARN_ON(ring->tx);
dma_sync_single_for_cpu(ring->dev->dev->dma_dev,
addr, len, DMA_FROM_DEVICE);
ssb_dma_sync_single_for_cpu(ring->dev->dev,
addr, len, DMA_FROM_DEVICE);
}
static inline
@@ -365,8 +365,8 @@ static inline
dma_addr_t addr, size_t len)
{
B43_WARN_ON(ring->tx);
dma_sync_single_for_device(ring->dev->dev->dma_dev,
addr, len, DMA_FROM_DEVICE);
ssb_dma_sync_single_for_device(ring->dev->dev,
addr, len, DMA_FROM_DEVICE);
}
static inline
@@ -381,7 +381,6 @@ static inline
static int alloc_ringmemory(struct b43_dmaring *ring)
{
struct device *dma_dev = ring->dev->dev->dma_dev;
gfp_t flags = GFP_KERNEL;
/* The specs call for 4K buffers for 30- and 32-bit DMA with 4K
@@ -392,11 +391,14 @@ static int alloc_ringmemory(struct b43_dmaring *ring)
* For unknown reasons - possibly a hardware error - the BCM4311 rev
* 02, which uses 64-bit DMA, needs the ring buffer in very low memory,
* which accounts for the GFP_DMA flag below.
*
* The flags here must match the flags in free_ringmemory below!
*/
if (ring->type == B43_DMA_64BIT)
flags |= GFP_DMA;
ring->descbase = dma_alloc_coherent(dma_dev, B43_DMA_RINGMEMSIZE,
&(ring->dmabase), flags);
ring->descbase = ssb_dma_alloc_consistent(ring->dev->dev,
B43_DMA_RINGMEMSIZE,
&(ring->dmabase), flags);
if (!ring->descbase) {
b43err(ring->dev->wl, "DMA ringmemory allocation failed\n");
return -ENOMEM;
@@ -408,10 +410,13 @@ static int alloc_ringmemory(struct b43_dmaring *ring)
static void free_ringmemory(struct b43_dmaring *ring)
{
struct device *dma_dev = ring->dev->dev->dma_dev;
gfp_t flags = GFP_KERNEL;
dma_free_coherent(dma_dev, B43_DMA_RINGMEMSIZE,
ring->descbase, ring->dmabase);
if (ring->type == B43_DMA_64BIT)
flags |= GFP_DMA;
ssb_dma_free_consistent(ring->dev->dev, B43_DMA_RINGMEMSIZE,
ring->descbase, ring->dmabase, flags);
}
/* Reset the RX DMA channel */
@@ -518,7 +523,7 @@ static bool b43_dma_mapping_error(struct b43_dmaring *ring,
dma_addr_t addr,
size_t buffersize, bool dma_to_device)
{
if (unlikely(dma_mapping_error(addr)))
if (unlikely(ssb_dma_mapping_error(ring->dev->dev, addr)))
return 1;
switch (ring->type) {
@@ -844,10 +849,10 @@ struct b43_dmaring *b43_setup_dmaring(struct b43_wldev *dev,
goto err_kfree_meta;
/* test for ability to dma to txhdr_cache */
dma_test = dma_map_single(dev->dev->dma_dev,
ring->txhdr_cache,
b43_txhdr_size(dev),
DMA_TO_DEVICE);
dma_test = ssb_dma_map_single(dev->dev,
ring->txhdr_cache,
b43_txhdr_size(dev),
DMA_TO_DEVICE);
if (b43_dma_mapping_error(ring, dma_test,
b43_txhdr_size(dev), 1)) {
@@ -859,10 +864,10 @@ struct b43_dmaring *b43_setup_dmaring(struct b43_wldev *dev,
if (!ring->txhdr_cache)
goto err_kfree_meta;
dma_test = dma_map_single(dev->dev->dma_dev,
ring->txhdr_cache,
b43_txhdr_size(dev),
DMA_TO_DEVICE);
dma_test = ssb_dma_map_single(dev->dev,
ring->txhdr_cache,
b43_txhdr_size(dev),
DMA_TO_DEVICE);
if (b43_dma_mapping_error(ring, dma_test,
b43_txhdr_size(dev), 1)) {
@@ -873,9 +878,9 @@ struct b43_dmaring *b43_setup_dmaring(struct b43_wldev *dev,
}
}
dma_unmap_single(dev->dev->dma_dev,
dma_test, b43_txhdr_size(dev),
DMA_TO_DEVICE);
ssb_dma_unmap_single(dev->dev,
dma_test, b43_txhdr_size(dev),
DMA_TO_DEVICE);
}
err = alloc_ringmemory(ring);