drm/amdgpu: add vm ioctl

It will be used for reserving vmid for shader debugging
that requires a fixed vmid.

v2: fix warning (Alex)

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

4 files changed, 40 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index dca4be970d13..1dbe76c3c366 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -948,6 +948,7 @@ void amdgpu_disable_vblank_kms(struct drm_device *dev, unsigned int pipe)
 const struct drm_ioctl_desc amdgpu_ioctls_kms[] = {
         DRM_IOCTL_DEF_DRV(AMDGPU_GEM_CREATE, amdgpu_gem_create_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
         DRM_IOCTL_DEF_DRV(AMDGPU_CTX, amdgpu_ctx_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
+        DRM_IOCTL_DEF_DRV(AMDGPU_VM, amdgpu_vm_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
         DRM_IOCTL_DEF_DRV(AMDGPU_BO_LIST, amdgpu_bo_list_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
         /* KMS */
         DRM_IOCTL_DEF_DRV(AMDGPU_GEM_MMAP, amdgpu_gem_mmap_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 8ecf82c5fe74..e4e2bacdb230 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2322,3 +2322,19 @@ void amdgpu_vm_manager_fini(struct amdgpu_device *adev)
                 }
         }
 }
+
+int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
+{
+        union drm_amdgpu_vm *args = data;
+
+        switch (args->in.op) {
+        case AMDGPU_VM_OP_RESERVE_VMID:
+        case AMDGPU_VM_OP_UNRESERVE_VMID:
+                return -EINVAL;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        return 0;
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
index e1d951ece433..b10ce2d08685 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
@@ -239,5 +239,6 @@ int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
 void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
                       struct amdgpu_bo_va *bo_va);
 void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint64_t vm_size);
+int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
 
 #endif
diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index 6c249e5cfb09..56ceb3daaba5 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -51,6 +51,7 @@ extern "C" {
 #define DRM_AMDGPU_GEM_OP               0x10
 #define DRM_AMDGPU_GEM_USERPTR          0x11
 #define DRM_AMDGPU_WAIT_FENCES          0x12
+#define DRM_AMDGPU_VM                   0x13
 
 #define DRM_IOCTL_AMDGPU_GEM_CREATE     DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_GEM_CREATE, union drm_amdgpu_gem_create)
 #define DRM_IOCTL_AMDGPU_GEM_MMAP       DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_GEM_MMAP, union drm_amdgpu_gem_mmap)
@@ -65,6 +66,7 @@ extern "C" {
 #define DRM_IOCTL_AMDGPU_GEM_OP         DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_GEM_OP, struct drm_amdgpu_gem_op)
 #define DRM_IOCTL_AMDGPU_GEM_USERPTR    DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_GEM_USERPTR, struct drm_amdgpu_gem_userptr)
 #define DRM_IOCTL_AMDGPU_WAIT_FENCES    DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_WAIT_FENCES, union drm_amdgpu_wait_fences)
+#define DRM_IOCTL_AMDGPU_VM             DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_VM, union drm_amdgpu_vm)
 
 #define AMDGPU_GEM_DOMAIN_CPU           0x1
 #define AMDGPU_GEM_DOMAIN_GTT           0x2
@@ -190,6 +192,26 @@ union drm_amdgpu_ctx {
         union drm_amdgpu_ctx_out out;
 };
 
+/* vm ioctl */
+#define AMDGPU_VM_OP_RESERVE_VMID       1
+#define AMDGPU_VM_OP_UNRESERVE_VMID     2
+
+struct drm_amdgpu_vm_in {
+        /** AMDGPU_VM_OP_* */
+        __u32   op;
+        __u32   flags;
+};
+
+struct drm_amdgpu_vm_out {
+        /** For future use, no flags defined so far */
+        __u64   flags;
+};
+
+union drm_amdgpu_vm {
+        struct drm_amdgpu_vm_in in;
+        struct drm_amdgpu_vm_out out;
+};
+
 /*
  * This is not a reliable API and you should expect it to fail for any
  * number of reasons and have fallback path that do not use userptr to