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/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c
index 8a09a1d..098f886 100644
--- a/drivers/net/wireless/b43/dma.c
+++ b/drivers/net/wireless/b43/dma.c
@@ -328,11 +328,11 @@
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 @@
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 @@
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 @@
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 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 @@
* 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 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 @@
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 @@
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 @@
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 @@
}
}
- 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);