always going to be SAC addressable.
The first thing your driver needs to do is query the PCI platform
-layer if it is capable of handling your devices DAC addressing
-capabilities:
+layer with your devices DAC addressing capabilities:
- int pci_dac_dma_supported(struct pci_dev *hwdev, u64 mask);
+ int pci_dac_set_dma_mask(struct pci_dev *pdev, u64 mask);
-You may not use the following interfaces if this routine fails.
+This routine behaves identically to pci_set_dma_mask. You may not
+use the following interfaces if this routine fails.
Next, DMA addresses using this API are kept track of using the
dma64_addr_t type. It is guaranteed to be big enough to hold any