diff options
| author |   Daniel Axtens <dja@axtens.net> | 2015-04-28 15:12:06 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2015-06-02 13:18:49 +1000 |
| commit | 3405c2570fd68fc5ccc703c8de9c23abf5e95819 (patch) | |
| tree | d041482415c16612f420c9311ddc30437ee7a696 | |
| parent | powerpc/powernv: Specialise pci_controller_ops for each controller type (diff) | |
| download | wireguard-linux-3405c2570fd68fc5ccc703c8de9c23abf5e95819.tar.xz wireguard-linux-3405c2570fd68fc5ccc703c8de9c23abf5e95819.zip | |
powerpc/pci: add dma_set_mask to pci_controller_ops
Some systems only need to deal with DMA masks for PCI devices.
For these systems, we can avoid the need for a platform hook and
instead use a pci controller based hook.
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/include/asm/pci-bridge.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/dma.c | 8 |
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h index a3b6252bcfc9..6d17bb8498bf 100644 --- a/arch/powerpc/include/asm/pci-bridge.h +++ b/arch/powerpc/include/asm/pci-bridge.h @@ -36,6 +36,8 @@ struct pci_controller_ops { int nvec, int type); void (*teardown_msi_irqs)(struct pci_dev *dev); #endif + + int (*dma_set_mask)(struct pci_dev *dev, u64 dma_mask); }; /* diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c index 484b2d4462c1..35e4dcc5dce3 100644 --- a/arch/powerpc/kernel/dma.c +++ b/arch/powerpc/kernel/dma.c @@ -248,6 +248,14 @@ int dma_set_mask(struct device *dev, u64 dma_mask) { if (ppc_md.dma_set_mask) return ppc_md.dma_set_mask(dev, dma_mask); + + if (dev_is_pci(dev)) { + struct pci_dev *pdev = to_pci_dev(dev); + struct pci_controller *phb = pci_bus_to_host(pdev->bus); + if (phb->controller_ops.dma_set_mask) + return phb->controller_ops.dma_set_mask(pdev, dma_mask); + } + return __dma_set_mask(dev, dma_mask); } EXPORT_SYMBOL(dma_set_mask); |