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ssb: Fix usage of struct device used for DMAing

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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>
This commit is contained in:
Michael Buesch
2008-04-11 11:59:00 +02:00
committed by John W. Linville
parent 2d4543fdb4
commit 4ac58469f1
4 changed files with 52 additions and 45 deletions
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14
drivers/ssb/main.c
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@ -436,15 +436,18 @@ 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;
}
@ -1018,15 +1021,14 @@ EXPORT_SYMBOL(ssb_dma_translation);
int ssb_dma_set_mask(struct ssb_device *ssb_dev, u64 mask)
{
struct device *dev = ssb_dev->dev;
struct device *dma_dev = ssb_dev->dma_dev;
#ifdef CONFIG_SSB_PCIHOST
if (ssb_dev->bus->bustype == SSB_BUSTYPE_PCI &&
!dma_supported(dev, mask))
return -EIO;
if (ssb_dev->bus->bustype == SSB_BUSTYPE_PCI)
return dma_set_mask(dma_dev, mask);
#endif
dev->coherent_dma_mask = mask;
dev->dma_mask = &dev->coherent_dma_mask;
dma_dev->coherent_dma_mask = mask;
dma_dev->dma_mask = &dma_dev->coherent_dma_mask;
return 0;
}