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Add API entrypoints for Cross Memory Attach

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Implement two new API for cross memory read and write operation.
 - hsaKmtProcessVMRead
 - hsaKmtProcessVMWrite

Add new ioclts necessary for the above APIs.

Change-Id: I0c153e3b4e1f32b7a8b102ad5c774d9ae9bfc2fa
Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
This commit is contained in:
Harish Kasiviswanathan
2017-01-27 18:10:24 -05:00
parent b3c3f7bae1
commit e79521b556
5 changed files with 158 additions and 1 deletions
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include/linux/kfd_ioctl.h
+35 -1
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@@ -395,6 +395,37 @@ struct kfd_ioctl_get_tile_config_args {
*/
};
struct kfd_memory_range {
uint64_t va_addr;
uint64_t size;
};
/* flags definitions
* BIT0: 0: read operation, 1: write operation.
* This also identifies if the src or dst array belongs to remote process
*/
#define KFD_CROSS_MEMORY_RW_BIT (1 << 0)
#define KFD_SET_CROSS_MEMORY_READ(flags) (flags &= ~KFD_CROSS_MEMORY_RW_BIT)
#define KFD_SET_CROSS_MEMORY_WRITE(flags) (flags |= KFD_CROSS_MEMORY_RW_BIT)
#define KFD_IS_CROSS_MEMORY_WRITE(flags) (flags & KFD_CROSS_MEMORY_RW_BIT)
struct kfd_ioctl_cross_memory_copy_args {
/* to KFD: Process ID of the remote process */
uint32_t pid;
/* to KFD: See above definition */
uint32_t flags;
/* to KFD: Source GPU VM range */
uint64_t src_mem_range_array;
/* to KFD: Size of above array */
uint64_t src_mem_array_size;
/* to KFD: Destination GPU VM range */
uint64_t dst_mem_range_array;
/* to KFD: Size of above array */
uint64_t dst_mem_array_size;
/* from KFD: Total amount of bytes copied */
uint64_t bytes_copied;
};
#define AMDKFD_IOCTL_BASE 'K'
#define AMDKFD_IO(nr) _IO(AMDKFD_IOCTL_BASE, nr)
#define AMDKFD_IOR(nr, type) _IOR(AMDKFD_IOCTL_BASE, nr, type)
@@ -504,7 +535,10 @@ struct kfd_ioctl_get_tile_config_args {
#define AMDKFD_IOC_IPC_EXPORT_HANDLE \
AMDKFD_IOWR(0x23, struct kfd_ioctl_ipc_export_handle_args)
#define AMDKFD_IOC_CROSS_MEMORY_COPY \
AMDKFD_IOWR(0x24, struct kfd_ioctl_cross_memory_copy_args)
#define AMDKFD_COMMAND_START 0x01
#define AMDKFD_COMMAND_END 0x24
#define AMDKFD_COMMAND_END 0x25
#endif