diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/sysemu/dma.h | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/include/sysemu/dma.h b/include/sysemu/dma.h index 37cd9f1..04687d8 100644 --- a/include/sysemu/dma.h +++ b/include/sysemu/dma.h @@ -80,12 +80,13 @@ static inline bool dma_memory_valid(AddressSpace *as, MEMTXATTRS_UNSPECIFIED); } -static inline int dma_memory_rw_relaxed(AddressSpace *as, dma_addr_t addr, - void *buf, dma_addr_t len, - DMADirection dir) +static inline MemTxResult dma_memory_rw_relaxed(AddressSpace *as, + dma_addr_t addr, + void *buf, dma_addr_t len, + DMADirection dir) { - return (bool)address_space_rw(as, addr, MEMTXATTRS_UNSPECIFIED, - buf, len, dir == DMA_DIRECTION_FROM_DEVICE); + return address_space_rw(as, addr, MEMTXATTRS_UNSPECIFIED, + buf, len, dir == DMA_DIRECTION_FROM_DEVICE); } static inline int dma_memory_read_relaxed(AddressSpace *as, dma_addr_t addr, @@ -101,9 +102,22 @@ static inline int dma_memory_write_relaxed(AddressSpace *as, dma_addr_t addr, DMA_DIRECTION_FROM_DEVICE); } -static inline int dma_memory_rw(AddressSpace *as, dma_addr_t addr, - void *buf, dma_addr_t len, - DMADirection dir) +/** + * dma_memory_rw: Read from or write to an address space from DMA controller. + * + * Return a MemTxResult indicating whether the operation succeeded + * or failed (eg unassigned memory, device rejected the transaction, + * IOMMU fault). + * + * @as: #AddressSpace to be accessed + * @addr: address within that address space + * @buf: buffer with the data transferred + * @len: the number of bytes to read or write + * @dir: indicates the transfer direction + */ +static inline MemTxResult dma_memory_rw(AddressSpace *as, dma_addr_t addr, + void *buf, dma_addr_t len, + DMADirection dir) { dma_barrier(as, dir); |