ssb: Fix usage of struct device used for DMAing
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>
diff --git a/drivers/net/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c
index 948eb1f..48e9124 100644
--- a/drivers/net/wireless/b43/dma.c
+++ b/drivers/net/wireless/b43/dma.c
@@ -373,10 +373,10 @@
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 @@
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 @@
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 @@
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 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 @@
*/
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 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 @@
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 @@
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 @@
}
}
- dma_unmap_single(dev->dev->dev,
+ dma_unmap_single(dev->dev->dma_dev,
dma_test, b43_txhdr_size(dev),
DMA_TO_DEVICE);
}