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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Jan 2026 07:22:15.8147 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ec9927f1-3ed0-4a7e-374a-08de4b61fccf X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN3PEPF0000B371.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR12MB4287 Content-Type: text/plain; charset="utf-8" From: Honglei Huang Introduce new ioctl AMDKFD_IOC_ALLOC_MEMORY_OF_GPU_BATCH to support allocating multiple non-contiguous CPU virtual address ranges that map to a single contiguous GPU virtual address. This allows userspace to efficiently manage scattered memory buffers by presenting them as a unified GPU address space, useful for applications dealing with fragmented host memory. Signed-off-by: Honglei Huang --- include/uapi/linux/kfd_ioctl.h | 37 +++++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/kfd_ioctl.h b/include/uapi/linux/kfd_ioctl.h index 84aa24c02..c364aa971 100644 --- a/include/uapi/linux/kfd_ioctl.h +++ b/include/uapi/linux/kfd_ioctl.h @@ -442,6 +442,38 @@ struct kfd_ioctl_alloc_memory_of_gpu_args { __u32 flags; }; =20 +/* Userptr range for batch allocation + * + * @start: start address of user virtual memory range + * @size: size of this user virtual memory range in bytes + */ +struct kfd_ioctl_userptr_range { + __u64 start; /* to KFD */ + __u64 size; /* to KFD */ +}; + +/* Allocate memory for batch of non-contiguous userptr ranges + * that map to a contiguous GPU virtual address + * + * @va_addr: contiguous GPU virtual address where all ranges will be m= apped + * @total_size: total size in bytes (sum of all range sizes) + * @handle: buffer handle returned to user mode + * @ranges_ptr: pointer to array of kfd_ioctl_userptr_range structures + * @num_ranges: number of ranges in the array + * @gpu_id: device identifier + * @flags: memory type and attributes (must include KFD_IOC_ALLOC_ME= M_FLAGS_USERPTR) + */ +struct kfd_ioctl_alloc_memory_of_gpu_batch_args { + __u64 va_addr; /* to KFD */ + __u64 total_size; /* to KFD */ + __u64 handle; /* from KFD */ + __u64 ranges_ptr; /* to KFD */ + __u32 num_ranges; /* to KFD */ + __u32 gpu_id; /* to KFD */ + __u32 flags; /* to KFD */ + __u32 pad; +}; + /* Free memory allocated with kfd_ioctl_alloc_memory_of_gpu * * @handle: memory handle returned by alloc @@ -1675,7 +1707,10 @@ struct kfd_ioctl_dbg_trap_args { #define AMDKFD_IOC_CREATE_PROCESS \ AMDKFD_IO(0x27) =20 +#define AMDKFD_IOC_ALLOC_MEMORY_OF_GPU_BATCH \ + AMDKFD_IOWR(0x28, struct kfd_ioctl_alloc_memory_of_gpu_batch_args) + #define AMDKFD_COMMAND_START 0x01 -#define AMDKFD_COMMAND_END 0x28 +#define AMDKFD_COMMAND_END 0x29 =20 #endif --=20 2.34.1