drm/amdkfd: Add placeholder for deprecated CMA ioctl

Implement a dummy ioctl to avoid undefined behaviour.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>

drivers/gpu/drm/amd/amdkfd/kfd_chardev.c

@@ -1940,6 +1940,13 @@ static int kfd_ioctl_dbg_set_debug_trap(struct file *filep,
 	return r;
 }
 
+/* Place holder for deprecated CMA API */
+static int kfd_ioctl_cross_memory_copy_deprecated(struct file *filep,
+				struct kfd_process *local_p, void *data) {
+	dev_dbg(kfd_device, "AMDKFD_IOC_CROSS_MEMORY_COPY is deprecated.\n");
+	return -EINVAL;
+}
+
 /* Handle requests for watching SMI events */
 static int kfd_ioctl_smi_events(struct file *filep,
 				struct kfd_process *p, void *data)
@@ -3237,9 +3244,11 @@ static const struct amdkfd_ioctl_desc amdkfd_ioctls[] = {
 	AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_TRAP,
 			kfd_ioctl_dbg_set_debug_trap, 0),
 
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_CROSS_MEMORY_COPY_DEPRECATED,
+			kfd_ioctl_cross_memory_copy_deprecated, 0),
+
 	AMDKFD_IOCTL_DEF(AMDKFD_IOC_RLC_SPM,
 			kfd_ioctl_rlc_spm, 0),
-
 };
 
 static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)

include/uapi/linux/kfd_ioctl.h

@@ -1076,6 +1076,23 @@ struct kfd_ioctl_ipc_import_handle_args {
 	__u32 flags;		/* from KFD */
 };
 
+struct kfd_ioctl_cross_memory_copy_deprecated_args {
+	/* to KFD: Process ID of the remote process */
+	__u32 pid;
+	/* to KFD: See above definition */
+	__u32 flags;
+	/* to KFD: Source GPU VM range */
+	__u64 src_mem_range_array;
+	/* to KFD: Size of above array */
+	__u64 src_mem_array_size;
+	/* to KFD: Destination GPU VM range */
+	__u64 dst_mem_range_array;
+	/* to KFD: Size of above array */
+	__u64 dst_mem_array_size;
+	/* from KFD: Total amount of bytes copied */
+	__u64 bytes_copied;
+};
+
 /* Guarantee host access to memory */
 #define KFD_IOCTL_SVM_FLAG_HOST_ACCESS 0x00000001
 /* Fine grained coherency between all devices with access */
@@ -1364,10 +1381,12 @@ struct kfd_ioctl_set_xnack_mode_args {
 #define AMDKFD_IOC_DBG_TRAP			\
 		AMDKFD_IOWR(0x82, struct kfd_ioctl_dbg_trap_args)
 
+#define AMDKFD_IOC_CROSS_MEMORY_COPY_DEPRECATED	\
+		AMDKFD_IOWR(0x83, struct kfd_ioctl_cross_memory_copy_deprecated_args)
+
 #define AMDKFD_IOC_RLC_SPM		\
 		AMDKFD_IOWR(0x84, struct kfd_ioctl_spm_args)
 
-
 #define AMDKFD_COMMAND_START_2		0x80
 #define AMDKFD_COMMAND_END_2		0x85