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authorChristoph Hellwig <hch@lst.de>2018-11-14 09:23:07 +0100
committerScott Wood <oss@buserror.net>2018-12-21 20:09:24 -0600
commitc6e5485e0cb509292a14e880e1944143f99758c7 (patch)
treebb47b8947a6d5ad49f74373a15dd063a368b7888 /arch/powerpc
parent7811eade247cdf90b26dd0951613e77614192771 (diff)
downloadlinux-c6e5485e0cb509292a14e880e1944143f99758c7.tar.bz2
powerpc/fsl_pci: simplify fsl_pci_dma_set_mask
swiotlb will only bounce buffer when the effective dma address for the device is smaller than the actual DMA range. Instead of flipping between the swiotlb and nommu ops for FSL SOCs that have the second outbound window just don't set the bus dma_mask in this case. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Scott Wood <oss@buserror.net>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/sysdev/fsl_pci.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index 918be816b097..f82d274fc91d 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -135,7 +135,7 @@ static int fsl_pci_dma_set_mask(struct device *dev, u64 dma_mask)
* mapping that allows addressing any RAM address from across PCI.
*/
if (dev_is_pci(dev) && dma_mask >= pci64_dma_offset * 2 - 1) {
- set_dma_ops(dev, &dma_nommu_ops);
+ dev->bus_dma_mask = 0;
set_dma_offset(dev, pci64_dma_offset);
}
@@ -395,10 +395,6 @@ static void setup_pci_atmu(struct pci_controller *hose)
out_be32(&pci->piw[win_idx].piwar, piwar);
}
- /*
- * install our own dma_set_mask handler to fixup dma_ops
- * and dma_offset
- */
ppc_md.dma_set_mask = fsl_pci_dma_set_mask;
pr_info("%pOF: Setup 64-bit PCI DMA window\n", hose->dn);