From: Chunming Zhou <David1.Zhou@xxxxxxx>
v2: get original gem handle from gobj
v3: update find bo data structure as union(in, out)
simply some code logic
Signed-off-by: Chunming Zhou <David1.Zhou at amd.com>
Signed-off-by: Junwei Zhang <Jerry.Zhang at amd.com> (v3)
Reviewed-by: Christian König <christian.koenig at amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 ++
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 63 +++++++++++++++++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 3 +-
include/uapi/drm/amdgpu_drm.h | 21 +++++++++++
4 files changed, 88 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 4cd20e7..46c370b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1213,6 +1213,8 @@ int amdgpu_gem_info_ioctl(struct drm_device *dev, void *data,
struct drm_file *filp);
int amdgpu_gem_userptr_ioctl(struct drm_device *dev, void *data,
struct drm_file *filp);
+int amdgpu_gem_find_bo_by_cpu_mapping_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *filp);
int amdgpu_gem_mmap_ioctl(struct drm_device *dev, void *data,
struct drm_file *filp);
int amdgpu_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index 71792d8..bae8417 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -288,6 +288,69 @@ int amdgpu_gem_create_ioctl(struct drm_device *dev, void *data,
return 0;
}
+static int amdgpu_gem_get_handle_from_object(struct drm_file *filp,
+ struct drm_gem_object *obj)
+{
+ int i;
+ struct drm_gem_object *tmp;
+
+ spin_lock(&filp->table_lock);
+ idr_for_each_entry(&filp->object_idr, tmp, i) {
+ if (obj == tmp) {
+ drm_gem_object_reference(obj);
+ spin_unlock(&filp->table_lock);
+ return i;
+ }
+ }
+ spin_unlock(&filp->table_lock);
+
+ return 0;
+}
+
+int amdgpu_gem_find_bo_by_cpu_mapping_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *filp)
+{
+ union drm_amdgpu_gem_find_bo *args = data;
+ struct drm_gem_object *gobj;
+ struct amdgpu_bo *bo;
+ struct ttm_buffer_object *tbo;
+ struct vm_area_struct *vma;
+ uint32_t handle;
+ int r;
+
+ if (offset_in_page(args->in.addr | args->in.size))
+ return -EINVAL;
+
+ down_read(¤t->mm->mmap_sem);
+ vma = find_vma(current->mm, args->in.addr);
+ if (!vma || vma->vm_file != filp->filp ||
+ (args->in.size > (vma->vm_end - args->in.addr))) {
+ args->out.handle = 0;
+ up_read(¤t->mm->mmap_sem);
+ return -EINVAL;
+ }
+ args->out.offset = args->in.addr - vma->vm_start;
+
+ tbo = vma->vm_private_data;
+ bo = container_of(tbo, struct amdgpu_bo, tbo);
+ amdgpu_bo_ref(bo);
+ gobj = &bo->gem_base;
+
+ handle = amdgpu_gem_get_handle_from_object(filp, gobj);
+ if (!handle) {
+ r = drm_gem_handle_create(filp, gobj, &handle);
+ if (r) {
+ DRM_ERROR("create gem handle failed\n");
+ up_read(¤t->mm->mmap_sem);
+ return r;
+ }
+ }
+ args->out.handle = handle;
+ up_read(¤t->mm->mmap_sem);
+
+ return 0;
+}
+
int amdgpu_gem_userptr_ioctl(struct drm_device *dev, void *data,
struct drm_file *filp)
{
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 7956848..1bd2cc1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -1100,7 +1100,8 @@ void amdgpu_disable_vblank_kms(struct drm_device *dev, unsigned int pipe)
DRM_IOCTL_DEF_DRV(AMDGPU_GEM_VA, amdgpu_gem_va_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(AMDGPU_GEM_OP, amdgpu_gem_op_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(AMDGPU_GEM_USERPTR, amdgpu_gem_userptr_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF_DRV(AMDGPU_FREESYNC, amdgpu_display_freesync_ioctl, DRM_MASTER)
+ DRM_IOCTL_DEF_DRV(AMDGPU_FREESYNC, amdgpu_display_freesync_ioctl, DRM_MASTER),
+ DRM_IOCTL_DEF_DRV(AMDGPU_GEM_FIND_BO, amdgpu_gem_find_bo_by_cpu_mapping_ioctl, DRM_AUTH|DRM_RENDER_ALLOW)
};
const int amdgpu_max_kms_ioctl = ARRAY_SIZE(amdgpu_ioctls_kms);
diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index 94444ee..000c415 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -54,6 +54,7 @@
#define DRM_AMDGPU_VM 0x13
#define DRM_AMDGPU_FENCE_TO_HANDLE 0x14
#define DRM_AMDGPU_SCHED 0x15
+#define DRM_AMDGPU_GEM_FIND_BO 0x16
/* not upstream */
#define DRM_AMDGPU_FREESYNC 0x5d
@@ -74,6 +75,7 @@
#define DRM_IOCTL_AMDGPU_FENCE_TO_HANDLE DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_FENCE_TO_HANDLE, union drm_amdgpu_fence_to_handle)
#define DRM_IOCTL_AMDGPU_SCHED DRM_IOW(DRM_COMMAND_BASE + DRM_AMDGPU_SCHED, union drm_amdgpu_sched)
#define DRM_IOCTL_AMDGPU_FREESYNC DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_FREESYNC, struct drm_amdgpu_freesync)
+#define DRM_IOCTL_AMDGPU_GEM_FIND_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_GEM_FIND_BO, union drm_amdgpu_gem_find_bo)
/**
* DOC: memory domains
@@ -392,6 +394,25 @@ struct drm_amdgpu_gem_wait_idle_out {
struct drm_amdgpu_gem_wait_idle_out out;
};
+struct drm_amdgpu_gem_find_bo_in {
+ /* CPU address */
+ __u64 addr;
+ /* memory size from CPU address */
+ __u64 size;
+};
+
+struct drm_amdgpu_gem_find_bo_out {
+ /* offset in bo */
+ __u64 offset;
+ /* resulting GEM handle */
+ __u32 handle;
+};
+
+union drm_amdgpu_gem_find_bo {
+ struct drm_amdgpu_gem_find_bo_in in;
+ struct drm_amdgpu_gem_find_bo_out out;
+};
+
struct drm_amdgpu_wait_cs_in {
/* Command submission handle
* handle equals 0 means none to wait for
--
1.9.1
