diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/pci/pci.h | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index 37ffd73708..a2de236eeb 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -801,8 +801,20 @@ static inline MemTxResult pci_dma_rw(PCIDevice *dev, dma_addr_t addr, return dma_memory_rw(pci_get_address_space(dev), addr, buf, len, dir); } -static inline int pci_dma_read(PCIDevice *dev, dma_addr_t addr, - void *buf, dma_addr_t len) +/** + * pci_dma_read: Read from an address space from PCI device. + * + * Return a MemTxResult indicating whether the operation succeeded + * or failed (eg unassigned memory, device rejected the transaction, + * IOMMU fault). Called within RCU critical section. + * + * @dev: #PCIDevice doing the memory access + * @addr: address within the #PCIDevice address space + * @buf: buffer with the data transferred + * @len: length of the data transferred + */ +static inline MemTxResult pci_dma_read(PCIDevice *dev, dma_addr_t addr, + void *buf, dma_addr_t len) { return pci_dma_rw(dev, addr, buf, len, DMA_DIRECTION_TO_DEVICE); } |