This is used for interoperability between ROCm compute and graphics APIs. It allows importing graphics driver BOs into the ROCm SVM address space for zero-copy GPU access. The API is split into two steps (query and import) to allow user mode to manage the virtual address space allocation for the imported buffer.
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| @@ -398,6 +398,24 @@ struct kfd_ioctl_unmap_memory_from_gpu_args { · 397 unmodified lines | |||
| 398 | __u32 n_success; /* to/from KFD */ | 398 | __u32 n_success; /* to/from KFD */ |
| 399 | }; | 399 | }; |
| 400 | 400 | ||
| 401 | struct kfd_ioctl_get_dmabuf_info_args { | ||
| 402 | __u64 size; /* from KFD */ | ||
| 403 | __u64 metadata_ptr; /* to KFD */ | ||
| 404 | __u32 metadata_size; /* to KFD (space allocated by user) | ||
| 405 | * from KFD (actual metadata size) | ||
| 406 | */ | ||
| 407 | __u32 gpu_id; /* from KFD */ | ||
| 408 | __u32 flags; /* from KFD (KFD_IOC_ALLOC_MEM_FLAGS) */ | ||
| 409 | __u32 dmabuf_fd; /* to KFD */ | ||
| 410 | }; | ||
| 411 | |||
| 412 | struct kfd_ioctl_import_dmabuf_args { | ||
| 413 | __u64 va_addr; /* to KFD */ | ||
| 414 | __u64 handle; /* from KFD */ | ||
| 415 | __u32 gpu_id; /* to KFD */ | ||
| 416 | __u32 dmabuf_fd; /* to KFD */ | ||
| 417 | }; | ||
| 418 | |||
| 401 | #define AMDKFD_IOCTL_BASE 'K' | 419 | #define AMDKFD_IOCTL_BASE 'K' |
| 402 | #define AMDKFD_IO(nr) _IO(AMDKFD_IOCTL_BASE, nr) | 420 | #define AMDKFD_IO(nr) _IO(AMDKFD_IOCTL_BASE, nr) |
| 403 | #define AMDKFD_IOR(nr, type) _IOR(AMDKFD_IOCTL_BASE, nr, type) | 421 | #define AMDKFD_IOR(nr, type) _IOR(AMDKFD_IOCTL_BASE, nr, type) |
| @@ -486,7 +504,13 @@ struct kfd_ioctl_unmap_memory_from_gpu_args { · 82 unmodified lines | |||
| 486 | #define AMDKFD_IOC_GET_QUEUE_WAVE_STATE \ | 504 | #define AMDKFD_IOC_GET_QUEUE_WAVE_STATE \ |
| 487 | AMDKFD_IOWR(0x1B, struct kfd_ioctl_get_queue_wave_state_args) | 505 | AMDKFD_IOWR(0x1B, struct kfd_ioctl_get_queue_wave_state_args) |
| 488 | 506 | ||
| 507 | #define AMDKFD_IOC_GET_DMABUF_INFO \ | ||
| 508 | AMDKFD_IOWR(0x1C, struct kfd_ioctl_get_dmabuf_info_args) | ||
| 509 | |||
| 510 | #define AMDKFD_IOC_IMPORT_DMABUF \ | ||
| 511 | AMDKFD_IOWR(0x1D, struct kfd_ioctl_import_dmabuf_args) | ||
| 512 | |||
| 489 | #define AMDKFD_COMMAND_START 0x01 | 513 | #define AMDKFD_COMMAND_START 0x01 |
| 490 | #define AMDKFD_COMMAND_END 0x1C | 514 | #define AMDKFD_COMMAND_END 0x1E |
| 491 | 515 | ||
| 492 | #endif | 516 | #endif |