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/ssb/main.c b/drivers/ssb/main.c
index d184f2a..d831a2b 100644
--- a/drivers/ssb/main.c
+++ b/drivers/ssb/main.c
@@ -462,18 +462,15 @@
#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 @@
{
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;