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ssb: Fix usage of struct device used for DMAing

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This fixes DMA on architectures where DMA is nontrivial, like PPC64.
We must use the host-device's (PCI) struct device for any DMA
operation instead of the SSB device. For this we add a new
struct device pointer to the SSB device structure that will always
point to the right device for DMAing.

Without this patch b43 and b44 drivers won't work on complex-DMA
architectures, that for example need dev->archdata for DMA operations.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Michael Buesch
2008-04-11 11:59:00 +02:00
committed by John W. Linville
parent 2d4543fdb4
commit 4ac58469f1
4 changed files with 52 additions and 45 deletions
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27
drivers/net/wireless/b43/dma.c
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@@ -373,10 +373,10 @@ static inline
dma_addr_t dmaaddr;
if (tx) {
dmaaddr = dma_map_single(ring->dev->dev->dev,
dmaaddr = dma_map_single(ring->dev->dev->dma_dev,
buf, len, DMA_TO_DEVICE);
} else {
dmaaddr = dma_map_single(ring->dev->dev->dev,
dmaaddr = dma_map_single(ring->dev->dev->dma_dev,
buf, len, DMA_FROM_DEVICE);
}
@@ -388,9 +388,10 @@ static inline
dma_addr_t addr, size_t len, int tx)
{
if (tx) {
dma_unmap_single(ring->dev->dev->dev, addr, len, DMA_TO_DEVICE);
dma_unmap_single(ring->dev->dev->dma_dev,
addr, len, DMA_TO_DEVICE);
} else {
dma_unmap_single(ring->dev->dev->dev,
dma_unmap_single(ring->dev->dev->dma_dev,
addr, len, DMA_FROM_DEVICE);
}
}
@@ -400,7 +401,7 @@ static inline
dma_addr_t addr, size_t len)
{
B43_WARN_ON(ring->tx);
dma_sync_single_for_cpu(ring->dev->dev->dev,
dma_sync_single_for_cpu(ring->dev->dev->dma_dev,
addr, len, DMA_FROM_DEVICE);
}
@@ -409,7 +410,7 @@ static inline
dma_addr_t addr, size_t len)
{
B43_WARN_ON(ring->tx);
dma_sync_single_for_device(ring->dev->dev->dev,
dma_sync_single_for_device(ring->dev->dev->dma_dev,
addr, len, DMA_FROM_DEVICE);
}
@@ -425,7 +426,7 @@ static inline
static int alloc_ringmemory(struct b43_dmaring *ring)
{
struct device *dev = ring->dev->dev->dev;
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
@@ -439,7 +440,7 @@ static int alloc_ringmemory(struct b43_dmaring *ring)
*/
if (ring->type == B43_DMA_64BIT)
flags |= GFP_DMA;
ring->descbase = dma_alloc_coherent(dev, B43_DMA_RINGMEMSIZE,
ring->descbase = dma_alloc_coherent(dma_dev, B43_DMA_RINGMEMSIZE,
&(ring->dmabase), flags);
if (!ring->descbase) {
b43err(ring->dev->wl, "DMA ringmemory allocation failed\n");
@@ -452,9 +453,9 @@ static int alloc_ringmemory(struct b43_dmaring *ring)
static void free_ringmemory(struct b43_dmaring *ring)
{
struct device *dev = ring->dev->dev->dev;
struct device *dma_dev = ring->dev->dev->dma_dev;
dma_free_coherent(dev, B43_DMA_RINGMEMSIZE,
dma_free_coherent(dma_dev, B43_DMA_RINGMEMSIZE,
ring->descbase, ring->dmabase);
}
@@ -854,7 +855,7 @@ 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->dev,
dma_test = dma_map_single(dev->dev->dma_dev,
ring->txhdr_cache,
b43_txhdr_size(dev),
DMA_TO_DEVICE);
@@ -869,7 +870,7 @@ 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->dev,
dma_test = dma_map_single(dev->dev->dma_dev,
ring->txhdr_cache,
b43_txhdr_size(dev),
DMA_TO_DEVICE);
@@ -883,7 +884,7 @@ struct b43_dmaring *b43_setup_dmaring(struct b43_wldev *dev,
}
}
dma_unmap_single(dev->dev->dev,
dma_unmap_single(dev->dev->dma_dev,
dma_test, b43_txhdr_size(dev),
DMA_TO_DEVICE);
}