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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
Show stats Download patch file Download diff file Expand all files Collapse all files

80
drivers/net/b44.c
View file

@ -148,7 +148,7 @@ static inline void b44_sync_dma_desc_for_device(struct ssb_device *sdev,
unsigned long offset,
enum dma_data_direction dir)
{
dma_sync_single_range_for_device(sdev->dma_dev, dma_base,
ssb_dma_sync_single_range_for_device(sdev, dma_base,
offset & dma_desc_align_mask,
dma_desc_sync_size, dir);
}
@ -158,7 +158,7 @@ static inline void b44_sync_dma_desc_for_cpu(struct ssb_device *sdev,
unsigned long offset,
enum dma_data_direction dir)
{
dma_sync_single_range_for_cpu(sdev->dma_dev, dma_base,
ssb_dma_sync_single_range_for_cpu(sdev, dma_base,
offset & dma_desc_align_mask,
dma_desc_sync_size, dir);
}
@ -613,7 +613,7 @@ static void b44_tx(struct b44 *bp)
BUG_ON(skb == NULL);
dma_unmap_single(bp->sdev->dma_dev,
ssb_dma_unmap_single(bp->sdev,
rp->mapping,
skb->len,
DMA_TO_DEVICE);
@ -653,29 +653,29 @@ static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
if (skb == NULL)
return -ENOMEM;
mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
mapping = ssb_dma_map_single(bp->sdev, skb->data,
RX_PKT_BUF_SZ,
DMA_FROM_DEVICE);
/* Hardware bug work-around, the chip is unable to do PCI DMA
to/from anything above 1GB :-( */
if (dma_mapping_error(mapping) ||
if (ssb_dma_mapping_error(bp->sdev, mapping) ||
mapping + RX_PKT_BUF_SZ > DMA_30BIT_MASK) {
/* Sigh... */
if (!dma_mapping_error(mapping))
dma_unmap_single(bp->sdev->dma_dev, mapping,
if (!ssb_dma_mapping_error(bp->sdev, mapping))
ssb_dma_unmap_single(bp->sdev, mapping,
RX_PKT_BUF_SZ, DMA_FROM_DEVICE);
dev_kfree_skb_any(skb);
skb = __netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ, GFP_ATOMIC|GFP_DMA);
if (skb == NULL)
return -ENOMEM;
mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
mapping = ssb_dma_map_single(bp->sdev, skb->data,
RX_PKT_BUF_SZ,
DMA_FROM_DEVICE);
if (dma_mapping_error(mapping) ||
if (ssb_dma_mapping_error(bp->sdev, mapping) ||
mapping + RX_PKT_BUF_SZ > DMA_30BIT_MASK) {
if (!dma_mapping_error(mapping))
dma_unmap_single(bp->sdev->dma_dev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
if (!ssb_dma_mapping_error(bp->sdev, mapping))
ssb_dma_unmap_single(bp->sdev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
dev_kfree_skb_any(skb);
return -ENOMEM;
}
@ -750,7 +750,7 @@ static void b44_recycle_rx(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
dest_idx * sizeof(dest_desc),
DMA_BIDIRECTIONAL);
dma_sync_single_for_device(bp->sdev->dma_dev, le32_to_cpu(src_desc->addr),
ssb_dma_sync_single_for_device(bp->sdev, le32_to_cpu(src_desc->addr),
RX_PKT_BUF_SZ,
DMA_FROM_DEVICE);
}
@ -772,7 +772,7 @@ static int b44_rx(struct b44 *bp, int budget)
struct rx_header *rh;
u16 len;
dma_sync_single_for_cpu(bp->sdev->dma_dev, map,
ssb_dma_sync_single_for_cpu(bp->sdev, map,
RX_PKT_BUF_SZ,
DMA_FROM_DEVICE);
rh = (struct rx_header *) skb->data;
@ -806,7 +806,7 @@ static int b44_rx(struct b44 *bp, int budget)
skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod);
if (skb_size < 0)
goto drop_it;
dma_unmap_single(bp->sdev->dma_dev, map,
ssb_dma_unmap_single(bp->sdev, map,
skb_size, DMA_FROM_DEVICE);
/* Leave out rx_header */
skb_put(skb, len + RX_PKT_OFFSET);
@ -966,24 +966,24 @@ static int b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
goto err_out;
}
mapping = dma_map_single(bp->sdev->dma_dev, skb->data, len, DMA_TO_DEVICE);
if (dma_mapping_error(mapping) || mapping + len > DMA_30BIT_MASK) {
mapping = ssb_dma_map_single(bp->sdev, skb->data, len, DMA_TO_DEVICE);
if (ssb_dma_mapping_error(bp->sdev, mapping) || mapping + len > DMA_30BIT_MASK) {
struct sk_buff *bounce_skb;
/* Chip can't handle DMA to/from >1GB, use bounce buffer */
if (!dma_mapping_error(mapping))
dma_unmap_single(bp->sdev->dma_dev, mapping, len,
if (!ssb_dma_mapping_error(bp->sdev, mapping))
ssb_dma_unmap_single(bp->sdev, mapping, len,
DMA_TO_DEVICE);
bounce_skb = __dev_alloc_skb(len, GFP_ATOMIC | GFP_DMA);
if (!bounce_skb)
goto err_out;
mapping = dma_map_single(bp->sdev->dma_dev, bounce_skb->data,
mapping = ssb_dma_map_single(bp->sdev, bounce_skb->data,
len, DMA_TO_DEVICE);
if (dma_mapping_error(mapping) || mapping + len > DMA_30BIT_MASK) {
if (!dma_mapping_error(mapping))
dma_unmap_single(bp->sdev->dma_dev, mapping,
if (ssb_dma_mapping_error(bp->sdev, mapping) || mapping + len > DMA_30BIT_MASK) {
if (!ssb_dma_mapping_error(bp->sdev, mapping))
ssb_dma_unmap_single(bp->sdev, mapping,
len, DMA_TO_DEVICE);
dev_kfree_skb_any(bounce_skb);
goto err_out;
@ -1082,7 +1082,7 @@ static void b44_free_rings(struct b44 *bp)
if (rp->skb == NULL)
continue;
dma_unmap_single(bp->sdev->dma_dev, rp->mapping, RX_PKT_BUF_SZ,
ssb_dma_unmap_single(bp->sdev, rp->mapping, RX_PKT_BUF_SZ,
DMA_FROM_DEVICE);
dev_kfree_skb_any(rp->skb);
rp->skb = NULL;
@ -1094,7 +1094,7 @@ static void b44_free_rings(struct b44 *bp)
if (rp->skb == NULL)
continue;
dma_unmap_single(bp->sdev->dma_dev, rp->mapping, rp->skb->len,
ssb_dma_unmap_single(bp->sdev, rp->mapping, rp->skb->len,
DMA_TO_DEVICE);
dev_kfree_skb_any(rp->skb);
rp->skb = NULL;
@ -1117,12 +1117,12 @@ static void b44_init_rings(struct b44 *bp)
memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
if (bp->flags & B44_FLAG_RX_RING_HACK)
dma_sync_single_for_device(bp->sdev->dma_dev, bp->rx_ring_dma,
ssb_dma_sync_single_for_device(bp->sdev, bp->rx_ring_dma,
DMA_TABLE_BYTES,
DMA_BIDIRECTIONAL);
if (bp->flags & B44_FLAG_TX_RING_HACK)
dma_sync_single_for_device(bp->sdev->dma_dev, bp->tx_ring_dma,
ssb_dma_sync_single_for_device(bp->sdev, bp->tx_ring_dma,
DMA_TABLE_BYTES,
DMA_TO_DEVICE);
@ -1144,25 +1144,27 @@ static void b44_free_consistent(struct b44 *bp)
bp->tx_buffers = NULL;
if (bp->rx_ring) {
if (bp->flags & B44_FLAG_RX_RING_HACK) {
dma_unmap_single(bp->sdev->dma_dev, bp->rx_ring_dma,
ssb_dma_unmap_single(bp->sdev, bp->rx_ring_dma,
DMA_TABLE_BYTES,
DMA_BIDIRECTIONAL);
kfree(bp->rx_ring);
} else
dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
bp->rx_ring, bp->rx_ring_dma);
ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
bp->rx_ring, bp->rx_ring_dma,
GFP_KERNEL);
bp->rx_ring = NULL;
bp->flags &= ~B44_FLAG_RX_RING_HACK;
}
if (bp->tx_ring) {
if (bp->flags & B44_FLAG_TX_RING_HACK) {
dma_unmap_single(bp->sdev->dma_dev, bp->tx_ring_dma,
ssb_dma_unmap_single(bp->sdev, bp->tx_ring_dma,
DMA_TABLE_BYTES,
DMA_TO_DEVICE);
kfree(bp->tx_ring);
} else
dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
bp->tx_ring, bp->tx_ring_dma);
ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
bp->tx_ring, bp->tx_ring_dma,
GFP_KERNEL);
bp->tx_ring = NULL;
bp->flags &= ~B44_FLAG_TX_RING_HACK;
}
@ -1187,7 +1189,7 @@ static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
goto out_err;
size = DMA_TABLE_BYTES;
bp->rx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size, &bp->rx_ring_dma, gfp);
bp->rx_ring = ssb_dma_alloc_consistent(bp->sdev, size, &bp->rx_ring_dma, gfp);
if (!bp->rx_ring) {
/* Allocation may have failed due to pci_alloc_consistent
insisting on use of GFP_DMA, which is more restrictive
@ -1199,11 +1201,11 @@ static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
if (!rx_ring)
goto out_err;
rx_ring_dma = dma_map_single(bp->sdev->dma_dev, rx_ring,
rx_ring_dma = ssb_dma_map_single(bp->sdev, rx_ring,
DMA_TABLE_BYTES,
DMA_BIDIRECTIONAL);
if (dma_mapping_error(rx_ring_dma) ||
if (ssb_dma_mapping_error(bp->sdev, rx_ring_dma) ||
rx_ring_dma + size > DMA_30BIT_MASK) {
kfree(rx_ring);
goto out_err;
@ -1214,9 +1216,9 @@ static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
bp->flags |= B44_FLAG_RX_RING_HACK;
}
bp->tx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size, &bp->tx_ring_dma, gfp);
bp->tx_ring = ssb_dma_alloc_consistent(bp->sdev, size, &bp->tx_ring_dma, gfp);
if (!bp->tx_ring) {
/* Allocation may have failed due to dma_alloc_coherent
/* Allocation may have failed due to ssb_dma_alloc_consistent
insisting on use of GFP_DMA, which is more restrictive
than necessary... */
struct dma_desc *tx_ring;
@ -1226,11 +1228,11 @@ static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
if (!tx_ring)
goto out_err;
tx_ring_dma = dma_map_single(bp->sdev->dma_dev, tx_ring,
tx_ring_dma = ssb_dma_map_single(bp->sdev, tx_ring,
DMA_TABLE_BYTES,
DMA_TO_DEVICE);
if (dma_mapping_error(tx_ring_dma) ||
if (ssb_dma_mapping_error(bp->sdev, tx_ring_dma) ||
tx_ring_dma + size > DMA_30BIT_MASK) {
kfree(tx_ring);
goto out_err;

35
drivers/net/wireless/b43/dma.c
View file

@ -328,10 +328,10 @@ static inline
dma_addr_t dmaaddr;
if (tx) {
dmaaddr = dma_map_single(ring->dev->dev->dma_dev,
dmaaddr = ssb_dma_map_single(ring->dev->dev,
buf, len, DMA_TO_DEVICE);
} else {
dmaaddr = dma_map_single(ring->dev->dev->dma_dev,
dmaaddr = ssb_dma_map_single(ring->dev->dev,
buf, len, DMA_FROM_DEVICE);
}
@ -343,10 +343,10 @@ static inline
dma_addr_t addr, size_t len, int tx)
{
if (tx) {
dma_unmap_single(ring->dev->dev->dma_dev,
ssb_dma_unmap_single(ring->dev->dev,
addr, len, DMA_TO_DEVICE);
} else {
dma_unmap_single(ring->dev->dev->dma_dev,
ssb_dma_unmap_single(ring->dev->dev,
addr, len, DMA_FROM_DEVICE);
}
}
@ -356,7 +356,7 @@ static inline
dma_addr_t addr, size_t len)
{
B43_WARN_ON(ring->tx);
dma_sync_single_for_cpu(ring->dev->dev->dma_dev,
ssb_dma_sync_single_for_cpu(ring->dev->dev,
addr, len, DMA_FROM_DEVICE);
}
@ -365,7 +365,7 @@ static inline
dma_addr_t addr, size_t len)
{
B43_WARN_ON(ring->tx);
dma_sync_single_for_device(ring->dev->dev->dma_dev,
ssb_dma_sync_single_for_device(ring->dev->dev,
addr, len, DMA_FROM_DEVICE);
}
@ -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
@ -392,10 +391,13 @@ 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->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");
@ -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) {
@ -844,7 +849,7 @@ 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->dma_dev,
dma_test = ssb_dma_map_single(dev->dev,
ring->txhdr_cache,
b43_txhdr_size(dev),
DMA_TO_DEVICE);
@ -859,7 +864,7 @@ 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->dma_dev,
dma_test = ssb_dma_map_single(dev->dev,
ring->txhdr_cache,
b43_txhdr_size(dev),
DMA_TO_DEVICE);
@ -873,7 +878,7 @@ struct b43_dmaring *b43_setup_dmaring(struct b43_wldev *dev,
}
}
dma_unmap_single(dev->dev->dma_dev,
ssb_dma_unmap_single(dev->dev,
dma_test, b43_txhdr_size(dev),
DMA_TO_DEVICE);
}

37
drivers/net/wireless/b43legacy/dma.c
View file

@ -393,11 +393,11 @@ dma_addr_t map_descbuffer(struct b43legacy_dmaring *ring,
dma_addr_t dmaaddr;
if (tx)
dmaaddr = dma_map_single(ring->dev->dev->dma_dev,
dmaaddr = ssb_dma_map_single(ring->dev->dev,
buf, len,
DMA_TO_DEVICE);
else
dmaaddr = dma_map_single(ring->dev->dev->dma_dev,
dmaaddr = ssb_dma_map_single(ring->dev->dev,
buf, len,
DMA_FROM_DEVICE);
@ -411,11 +411,11 @@ void unmap_descbuffer(struct b43legacy_dmaring *ring,
int tx)
{
if (tx)
dma_unmap_single(ring->dev->dev->dma_dev,
ssb_dma_unmap_single(ring->dev->dev,
addr, len,
DMA_TO_DEVICE);
else
dma_unmap_single(ring->dev->dev->dma_dev,
ssb_dma_unmap_single(ring->dev->dev,
addr, len,
DMA_FROM_DEVICE);
}
@ -427,7 +427,7 @@ void sync_descbuffer_for_cpu(struct b43legacy_dmaring *ring,
{
B43legacy_WARN_ON(ring->tx);
dma_sync_single_for_cpu(ring->dev->dev->dma_dev,
ssb_dma_sync_single_for_cpu(ring->dev->dev,
addr, len, DMA_FROM_DEVICE);
}
@ -438,7 +438,7 @@ void sync_descbuffer_for_device(struct b43legacy_dmaring *ring,
{
B43legacy_WARN_ON(ring->tx);
dma_sync_single_for_device(ring->dev->dev->dma_dev,
ssb_dma_sync_single_for_device(ring->dev->dev,
addr, len, DMA_FROM_DEVICE);
}
@ -458,10 +458,11 @@ void free_descriptor_buffer(struct b43legacy_dmaring *ring,
static int alloc_ringmemory(struct b43legacy_dmaring *ring)
{
struct device *dma_dev = ring->dev->dev->dma_dev;
ring->descbase = dma_alloc_coherent(dma_dev, B43legacy_DMA_RINGMEMSIZE,
&(ring->dmabase), GFP_KERNEL);
/* GFP flags must match the flags in free_ringmemory()! */
ring->descbase = ssb_dma_alloc_consistent(ring->dev->dev,
B43legacy_DMA_RINGMEMSIZE,
&(ring->dmabase),
GFP_KERNEL);
if (!ring->descbase) {
b43legacyerr(ring->dev->wl, "DMA ringmemory allocation"
" failed\n");
@ -474,10 +475,8 @@ static int alloc_ringmemory(struct b43legacy_dmaring *ring)
static void free_ringmemory(struct b43legacy_dmaring *ring)
{
struct device *dma_dev = ring->dev->dev->dma_dev;
dma_free_coherent(dma_dev, B43legacy_DMA_RINGMEMSIZE,
ring->descbase, ring->dmabase);
ssb_dma_free_consistent(ring->dev->dev, B43legacy_DMA_RINGMEMSIZE,
ring->descbase, ring->dmabase, GFP_KERNEL);
}
/* Reset the RX DMA channel */
@ -589,7 +588,7 @@ static bool b43legacy_dma_mapping_error(struct b43legacy_dmaring *ring,
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) {
@ -893,7 +892,7 @@ struct b43legacy_dmaring *b43legacy_setup_dmaring(struct b43legacy_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,
dma_test = ssb_dma_map_single(dev->dev, ring->txhdr_cache,
sizeof(struct b43legacy_txhdr_fw3),
DMA_TO_DEVICE);
@ -907,7 +906,7 @@ struct b43legacy_dmaring *b43legacy_setup_dmaring(struct b43legacy_wldev *dev,
if (!ring->txhdr_cache)
goto err_kfree_meta;
dma_test = dma_map_single(dev->dev->dma_dev,
dma_test = ssb_dma_map_single(dev->dev,
ring->txhdr_cache,
sizeof(struct b43legacy_txhdr_fw3),
DMA_TO_DEVICE);
@ -917,8 +916,8 @@ struct b43legacy_dmaring *b43legacy_setup_dmaring(struct b43legacy_wldev *dev,
goto err_kfree_txhdr_cache;
}
dma_unmap_single(dev->dev->dma_dev,
dma_test, sizeof(struct b43legacy_txhdr_fw3),
ssb_dma_unmap_single(dev->dev, dma_test,
sizeof(struct b43legacy_txhdr_fw3),
DMA_TO_DEVICE);
}

2
drivers/ssb/Kconfig
View file

@ -2,7 +2,7 @@ menu "Sonics Silicon Backplane"
config SSB_POSSIBLE
bool
depends on HAS_IOMEM
depends on HAS_IOMEM && HAS_DMA
default y
config SSB

75
drivers/ssb/main.c
View file

@ -462,18 +462,15 @@ static int ssb_devices_register(struct ssb_bus *bus)
#ifdef CONFIG_SSB_PCIHOST
sdev->irq = bus->host_pci->irq;
dev->parent = &bus->host_pci->dev;
sdev->dma_dev = &bus->host_pci->dev;
#endif
break;
case SSB_BUSTYPE_PCMCIA:
#ifdef CONFIG_SSB_PCMCIAHOST
sdev->irq = bus->host_pcmcia->irq.AssignedIRQ;
dev->parent = &bus->host_pcmcia->dev;
sdev->dma_dev = &bus->host_pcmcia->dev;
#endif
break;
case SSB_BUSTYPE_SSB:
sdev->dma_dev = dev;
break;
}
@ -1156,36 +1153,82 @@ u32 ssb_dma_translation(struct ssb_device *dev)
{
switch (dev->bus->bustype) {
case SSB_BUSTYPE_SSB:
case SSB_BUSTYPE_PCMCIA:
return 0;
case SSB_BUSTYPE_PCI:
return SSB_PCI_DMA;
default:
__ssb_dma_not_implemented(dev);
}
return 0;
}
EXPORT_SYMBOL(ssb_dma_translation);
int ssb_dma_set_mask(struct ssb_device *ssb_dev, u64 mask)
int ssb_dma_set_mask(struct ssb_device *dev, u64 mask)
{
struct device *dma_dev = ssb_dev->dma_dev;
int err = 0;
int err;
#ifdef CONFIG_SSB_PCIHOST
if (ssb_dev->bus->bustype == SSB_BUSTYPE_PCI) {
err = pci_set_dma_mask(ssb_dev->bus->host_pci, mask);
switch (dev->bus->bustype) {
case SSB_BUSTYPE_PCI:
err = pci_set_dma_mask(dev->bus->host_pci, mask);
if (err)
return err;
err = pci_set_consistent_dma_mask(ssb_dev->bus->host_pci, mask);
err = pci_set_consistent_dma_mask(dev->bus->host_pci, mask);
return err;
case SSB_BUSTYPE_SSB:
return dma_set_mask(dev->dev, mask);
default:
__ssb_dma_not_implemented(dev);
}
#endif
dma_dev->coherent_dma_mask = mask;
dma_dev->dma_mask = &dma_dev->coherent_dma_mask;
return err;
return -ENOSYS;
}
EXPORT_SYMBOL(ssb_dma_set_mask);
void * ssb_dma_alloc_consistent(struct ssb_device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp_flags)
{
switch (dev->bus->bustype) {
case SSB_BUSTYPE_PCI:
if (gfp_flags & GFP_DMA) {
/* Workaround: The PCI API does not support passing
* a GFP flag. */
return dma_alloc_coherent(&dev->bus->host_pci->dev,
size, dma_handle, gfp_flags);
}
return pci_alloc_consistent(dev->bus->host_pci, size, dma_handle);
case SSB_BUSTYPE_SSB:
return dma_alloc_coherent(dev->dev, size, dma_handle, gfp_flags);
default:
__ssb_dma_not_implemented(dev);
}
return NULL;
}
EXPORT_SYMBOL(ssb_dma_alloc_consistent);
void ssb_dma_free_consistent(struct ssb_device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle,
gfp_t gfp_flags)
{
switch (dev->bus->bustype) {
case SSB_BUSTYPE_PCI:
if (gfp_flags & GFP_DMA) {
/* Workaround: The PCI API does not support passing
* a GFP flag. */
dma_free_coherent(&dev->bus->host_pci->dev,
size, vaddr, dma_handle);
return;
}
pci_free_consistent(dev->bus->host_pci, size,
vaddr, dma_handle);
return;
case SSB_BUSTYPE_SSB:
dma_free_coherent(dev->dev, size, vaddr, dma_handle);
return;
default:
__ssb_dma_not_implemented(dev);
}
}
EXPORT_SYMBOL(ssb_dma_free_consistent);
int ssb_bus_may_powerdown(struct ssb_bus *bus)
{
struct ssb_chipcommon *cc;

143
include/linux/ssb/ssb.h
View file

@ -137,9 +137,6 @@ struct ssb_device {
const struct ssb_bus_ops *ops;
struct device *dev;
/* Pointer to the device that has to be used for
* any DMA related operation. */
struct device *dma_dev;
struct ssb_bus *bus;
struct ssb_device_id id;
@ -399,13 +396,151 @@ static inline void ssb_block_write(struct ssb_device *dev, const void *buffer,
#endif /* CONFIG_SSB_BLOCKIO */
/* The SSB DMA API. Use this API for any DMA operation on the device.
* This API basically is a wrapper that calls the correct DMA API for
* the host device type the SSB device is attached to. */
/* Translation (routing) bits that need to be ORed to DMA
* addresses before they are given to a device. */
extern u32 ssb_dma_translation(struct ssb_device *dev);
#define SSB_DMA_TRANSLATION_MASK 0xC0000000
#define SSB_DMA_TRANSLATION_SHIFT 30
extern int ssb_dma_set_mask(struct ssb_device *ssb_dev, u64 mask);
extern int ssb_dma_set_mask(struct ssb_device *dev, u64 mask);
extern void * ssb_dma_alloc_consistent(struct ssb_device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp_flags);
extern void ssb_dma_free_consistent(struct ssb_device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle,
gfp_t gfp_flags);
static inline void __cold __ssb_dma_not_implemented(struct ssb_device *dev)
{
#ifdef CONFIG_SSB_DEBUG
printk(KERN_ERR "SSB: BUG! Calling DMA API for "
"unsupported bustype %d\n", dev->bus->bustype);
#endif /* DEBUG */
}
static inline int ssb_dma_mapping_error(struct ssb_device *dev, dma_addr_t addr)
{
switch (dev->bus->bustype) {
case SSB_BUSTYPE_PCI:
return pci_dma_mapping_error(addr);
case SSB_BUSTYPE_SSB:
return dma_mapping_error(addr);
default:
__ssb_dma_not_implemented(dev);
}
return -ENOSYS;
}
static inline dma_addr_t ssb_dma_map_single(struct ssb_device *dev, void *p,
size_t size, enum dma_data_direction dir)
{
switch (dev->bus->bustype) {
case SSB_BUSTYPE_PCI:
return pci_map_single(dev->bus->host_pci, p, size, dir);
case SSB_BUSTYPE_SSB:
return dma_map_single(dev->dev, p, size, dir);
default:
__ssb_dma_not_implemented(dev);
}
return 0;
}
static inline void ssb_dma_unmap_single(struct ssb_device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction dir)
{
switch (dev->bus->bustype) {
case SSB_BUSTYPE_PCI:
pci_unmap_single(dev->bus->host_pci, dma_addr, size, dir);
return;
case SSB_BUSTYPE_SSB:
dma_unmap_single(dev->dev, dma_addr, size, dir);
return;
default:
__ssb_dma_not_implemented(dev);
}
}
static inline void ssb_dma_sync_single_for_cpu(struct ssb_device *dev,
dma_addr_t dma_addr,
size_t size,
enum dma_data_direction dir)
{
switch (dev->bus->bustype) {
case SSB_BUSTYPE_PCI:
pci_dma_sync_single_for_cpu(dev->bus->host_pci, dma_addr,
size, dir);
return;
case SSB_BUSTYPE_SSB:
dma_sync_single_for_cpu(dev->dev, dma_addr, size, dir);
return;
default:
__ssb_dma_not_implemented(dev);
}
}
static inline void ssb_dma_sync_single_for_device(struct ssb_device *dev,
dma_addr_t dma_addr,
size_t size,
enum dma_data_direction dir)
{
switch (dev->bus->bustype) {
case SSB_BUSTYPE_PCI:
pci_dma_sync_single_for_device(dev->bus->host_pci, dma_addr,
size, dir);
return;
case SSB_BUSTYPE_SSB:
dma_sync_single_for_device(dev->dev, dma_addr, size, dir);
return;
default:
__ssb_dma_not_implemented(dev);
}
}
static inline void ssb_dma_sync_single_range_for_cpu(struct ssb_device *dev,
dma_addr_t dma_addr,
unsigned long offset,
size_t size,
enum dma_data_direction dir)
{
switch (dev->bus->bustype) {
case SSB_BUSTYPE_PCI:
/* Just sync everything. That's all the PCI API can do. */
pci_dma_sync_single_for_cpu(dev->bus->host_pci, dma_addr,
offset + size, dir);
return;
case SSB_BUSTYPE_SSB:
dma_sync_single_range_for_cpu(dev->dev, dma_addr, offset,
size, dir);
return;
default:
__ssb_dma_not_implemented(dev);
}
}
static inline void ssb_dma_sync_single_range_for_device(struct ssb_device *dev,
dma_addr_t dma_addr,
unsigned long offset,
size_t size,
enum dma_data_direction dir)
{
switch (dev->bus->bustype) {
case SSB_BUSTYPE_PCI:
/* Just sync everything. That's all the PCI API can do. */
pci_dma_sync_single_for_device(dev->bus->host_pci, dma_addr,
offset + size, dir);
return;
case SSB_BUSTYPE_SSB:
dma_sync_single_range_for_device(dev->dev, dma_addr, offset,
size, dir);
return;
default:
__ssb_dma_not_implemented(dev);
}
}
#ifdef CONFIG_SSB_PCIHOST