[PATCH 3/5] drm/amdkfd: Add AMDKFD_IOC_SVM_RANGES ioctl command

[Honglei Huang <honglei1.huang@amd.com>]

From: Honglei Huang <Honglei1.Huang@amd.com>

Define a new ioctl command AMDKFD_IOC_SVM_RANGES (0x27) to support
batch registration of multiple SVM ranges. Update AMDKFD_COMMAND_END
from 0x27 to 0x28 accordingly.

This ioctl provides a more efficient interface for userspace to
register multiple non-contiguous memory ranges with the same set
of SVM attributes in a single system call, reducing context switching
overhead compared to multiple AMDKFD_IOC_SVM calls.

Signed-off-by: Honglei Huang <Honglei1.Huang@amd.com>
---
 include/uapi/linux/kfd_ioctl.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/uapi/linux/kfd_ioctl.h b/include/uapi/linux/kfd_ioctl.h
index d782bda1d2ca..c5f9595ef30d 100644
--- a/include/uapi/linux/kfd_ioctl.h
+++ b/include/uapi/linux/kfd_ioctl.h
@@ -663,7 +663,6 @@ enum kfd_mmio_remap {
 #define KFD_IOCTL_SVM_FLAG_GPU_ALWAYS_MAPPED   0x00000040
 /* Fine grained coherency between all devices using device-scope atomics */
 #define KFD_IOCTL_SVM_FLAG_EXT_COHERENT        0x00000080
-
 /**
  * kfd_ioctl_svm_op - SVM ioctl operations
  *
@@ -1622,7 +1621,10 @@ struct kfd_ioctl_dbg_trap_args {
 #define AMDKFD_IOC_DBG_TRAP			\
 		AMDKFD_IOWR(0x26, struct kfd_ioctl_dbg_trap_args)
 
+#define AMDKFD_IOC_SVM_RANGES		\
+		AMDKFD_IOWR(0x27, struct kfd_ioctl_svm_ranges_args)
+
 #define AMDKFD_COMMAND_START		0x01
-#define AMDKFD_COMMAND_END		0x27
+#define AMDKFD_COMMAND_END		0x28
 
 #endif
-- 
2.34.1