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path: root/drivers/net/wireless/b43/dma.c
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Diffstat (limited to 'drivers/net/wireless/b43/dma.c')
-rw-r--r--drivers/net/wireless/b43/dma.c64
1 files changed, 39 insertions, 25 deletions
diff --git a/drivers/net/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c
index 3dfb28a34be9..48e912487b16 100644
--- a/drivers/net/wireless/b43/dma.c
+++ b/drivers/net/wireless/b43/dma.c
@@ -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);
}
@@ -560,7 +561,7 @@ static int b43_dmacontroller_tx_reset(struct b43_wldev *dev, u16 mmio_base,
/* Check if a DMA mapping address is invalid. */
static bool b43_dma_mapping_error(struct b43_dmaring *ring,
dma_addr_t addr,
- size_t buffersize)
+ size_t buffersize, bool dma_to_device)
{
if (unlikely(dma_mapping_error(addr)))
return 1;
@@ -568,11 +569,11 @@ static bool b43_dma_mapping_error(struct b43_dmaring *ring,
switch (ring->type) {
case B43_DMA_30BIT:
if ((u64)addr + buffersize > (1ULL << 30))
- return 1;
+ goto address_error;
break;
case B43_DMA_32BIT:
if ((u64)addr + buffersize > (1ULL << 32))
- return 1;
+ goto address_error;
break;
case B43_DMA_64BIT:
/* Currently we can't have addresses beyond
@@ -582,6 +583,12 @@ static bool b43_dma_mapping_error(struct b43_dmaring *ring,
/* The address is OK. */
return 0;
+
+address_error:
+ /* We can't support this address. Unmap it again. */
+ unmap_descbuffer(ring, addr, buffersize, dma_to_device);
+
+ return 1;
}
static int setup_rx_descbuffer(struct b43_dmaring *ring,
@@ -599,7 +606,7 @@ static int setup_rx_descbuffer(struct b43_dmaring *ring,
if (unlikely(!skb))
return -ENOMEM;
dmaaddr = map_descbuffer(ring, skb->data, ring->rx_buffersize, 0);
- if (b43_dma_mapping_error(ring, dmaaddr, ring->rx_buffersize)) {
+ if (b43_dma_mapping_error(ring, dmaaddr, ring->rx_buffersize, 0)) {
/* ugh. try to realloc in zone_dma */
gfp_flags |= GFP_DMA;
@@ -612,7 +619,8 @@ static int setup_rx_descbuffer(struct b43_dmaring *ring,
ring->rx_buffersize, 0);
}
- if (b43_dma_mapping_error(ring, dmaaddr, ring->rx_buffersize)) {
+ if (b43_dma_mapping_error(ring, dmaaddr, ring->rx_buffersize, 0)) {
+ b43err(ring->dev->wl, "RX DMA buffer allocation failed\n");
dev_kfree_skb_any(skb);
return -EIO;
}
@@ -847,12 +855,13 @@ 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);
- if (b43_dma_mapping_error(ring, dma_test, b43_txhdr_size(dev))) {
+ if (b43_dma_mapping_error(ring, dma_test,
+ b43_txhdr_size(dev), 1)) {
/* ugh realloc */
kfree(ring->txhdr_cache);
ring->txhdr_cache = kcalloc(nr_slots,
@@ -861,17 +870,21 @@ 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);
if (b43_dma_mapping_error(ring, dma_test,
- b43_txhdr_size(dev)))
+ b43_txhdr_size(dev), 1)) {
+
+ b43err(dev->wl,
+ "TXHDR DMA allocation failed\n");
goto err_kfree_txhdr_cache;
+ }
}
- dma_unmap_single(dev->dev->dev,
+ dma_unmap_single(dev->dev->dma_dev,
dma_test, b43_txhdr_size(dev),
DMA_TO_DEVICE);
}
@@ -1189,7 +1202,7 @@ static int dma_tx_fragment(struct b43_dmaring *ring,
meta_hdr->dmaaddr = map_descbuffer(ring, (unsigned char *)header,
hdrsize, 1);
- if (b43_dma_mapping_error(ring, meta_hdr->dmaaddr, hdrsize)) {
+ if (b43_dma_mapping_error(ring, meta_hdr->dmaaddr, hdrsize, 1)) {
ring->current_slot = old_top_slot;
ring->used_slots = old_used_slots;
return -EIO;
@@ -1208,7 +1221,7 @@ static int dma_tx_fragment(struct b43_dmaring *ring,
meta->dmaaddr = map_descbuffer(ring, skb->data, skb->len, 1);
/* create a bounce buffer in zone_dma on mapping failure. */
- if (b43_dma_mapping_error(ring, meta->dmaaddr, skb->len)) {
+ if (b43_dma_mapping_error(ring, meta->dmaaddr, skb->len, 1)) {
bounce_skb = __dev_alloc_skb(skb->len, GFP_ATOMIC | GFP_DMA);
if (!bounce_skb) {
ring->current_slot = old_top_slot;
@@ -1222,7 +1235,7 @@ static int dma_tx_fragment(struct b43_dmaring *ring,
skb = bounce_skb;
meta->skb = skb;
meta->dmaaddr = map_descbuffer(ring, skb->data, skb->len, 1);
- if (b43_dma_mapping_error(ring, meta->dmaaddr, skb->len)) {
+ if (b43_dma_mapping_error(ring, meta->dmaaddr, skb->len, 1)) {
ring->current_slot = old_top_slot;
ring->used_slots = old_used_slots;
err = -EIO;
@@ -1337,6 +1350,7 @@ out_unlock:
return err;
}
+/* Called with IRQs disabled. */
void b43_dma_handle_txstatus(struct b43_wldev *dev,
const struct b43_txstatus *status)
{
@@ -1349,8 +1363,8 @@ void b43_dma_handle_txstatus(struct b43_wldev *dev,
ring = parse_cookie(dev, status->cookie, &slot);
if (unlikely(!ring))
return;
- B43_WARN_ON(!irqs_disabled());
- spin_lock(&ring->lock);
+
+ spin_lock(&ring->lock); /* IRQs are already disabled. */
B43_WARN_ON(!ring->tx);
ops = ring->ops;
generated by cgit v1.2.3 (git 2.46.0) at 2025-09-05 10:05:11 +0000