diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/misc/habanalabs.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/uapi/misc/habanalabs.h b/include/uapi/misc/habanalabs.h index 9705b8adb60c..5753157e71b3 100644 --- a/include/uapi/misc/habanalabs.h +++ b/include/uapi/misc/habanalabs.h @@ -490,6 +490,22 @@ union hl_cb_args { struct hl_cb_out out; }; +/* HL_CS_CHUNK_FLAGS_ values + * + * HL_CS_CHUNK_FLAGS_USER_ALLOC_CB: + * Indicates if the CB was allocated and mapped by userspace. + * User allocated CB is a command buffer allocated by the user, via malloc + * (or similar). After allocating the CB, the user invokes “memory ioctl” + * to map the user memory into a device virtual address. The user provides + * this address via the cb_handle field. The interface provides the + * ability to create a large CBs, Which aren’t limited to + * “HL_MAX_CB_SIZE”. Therefore, it increases the PCI-DMA queues + * throughput. This CB allocation method also reduces the use of Linux + * DMA-able memory pool. Which are limited and used by other Linux + * sub-systems. + */ +#define HL_CS_CHUNK_FLAGS_USER_ALLOC_CB 0x1 + /* * This structure size must always be fixed to 64-bytes for backward * compatibility |