diff options
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/misc/habanalabs.h | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/include/uapi/misc/habanalabs.h b/include/uapi/misc/habanalabs.h index 3b995e841eb8..c67d18901c1d 100644 --- a/include/uapi/misc/habanalabs.h +++ b/include/uapi/misc/habanalabs.h @@ -1851,15 +1851,24 @@ struct hl_mem_in { /** * structure for exporting DMABUF object (used with * the HL_MEM_OP_EXPORT_DMABUF_FD op) - * @handle: handle returned from HL_MEM_OP_ALLOC. - * in Gaudi, where we don't have MMU for the device memory, the - * driver expects a physical address (instead of a handle) in the - * device memory space. - * @mem_size: size of memory allocation. Relevant only for GAUDI + * @addr: for Gaudi1, the driver expects a physical address + * inside the device's DRAM. this is because in Gaudi1 + * we don't have MMU that covers the device's DRAM. + * for all other ASICs, the driver expects a device + * virtual address that represents the start address of + * a mapped DRAM memory area inside the device. + * the address must be the same as was received from the + * driver during a previous HL_MEM_OP_MAP operation. + * @mem_size: size of memory to export. + * @offset: for Gaudi1, this value must be 0. For all other ASICs, + * the driver expects an offset inside of the memory area + * describe by addr. the offset represents the start + * address of that the exported dma-buf object describes. */ struct { - __u64 handle; + __u64 addr; __u64 mem_size; + __u64 offset; } export_dmabuf_fd; }; |