[PATCH v2] drm/i915/gvt: Make use of idr_find and idr_for_each_entry in dmabuf
Cai Huoqing
cai.huoqing at linux.dev
Fri Mar 3 14:07:18 UTC 2023
This patch uses the already existing IDR mechanism to simplify
and improve the dmabuf code.
Using 'vgpu.object_idr' directly instead of 'dmabuf_obj_list_head'
or 'dmabuf.list', because the dmabuf_obj can be found by 'idr_find'
or 'idr_for_each_entry'.
Signed-off-by: Cai Huoqing <cai.huoqing at linux.dev>
---
v1->v2:
1.Use idr_find to get the target one and free it instead of free all dma objs.
2.Revert the original code 'ret' related
3.Add '&& !idr_is_empty()' like the original code '&& !list_empty()'
v1 link:
https://lore.kernel.org/lkml/20230302115318.79487-1-cai.huoqing@linux.dev/
drivers/gpu/drm/i915/gvt/dmabuf.c | 58 +++++++------------------------
drivers/gpu/drm/i915/gvt/dmabuf.h | 1 -
drivers/gpu/drm/i915/gvt/gvt.h | 1 -
drivers/gpu/drm/i915/gvt/vgpu.c | 1 -
4 files changed, 12 insertions(+), 49 deletions(-)
diff --git a/drivers/gpu/drm/i915/gvt/dmabuf.c b/drivers/gpu/drm/i915/gvt/dmabuf.c
index 6834f9fe40cf..cf619b1ed3ad 100644
--- a/drivers/gpu/drm/i915/gvt/dmabuf.c
+++ b/drivers/gpu/drm/i915/gvt/dmabuf.c
@@ -133,21 +133,15 @@ static void dmabuf_gem_object_free(struct kref *kref)
struct intel_vgpu_dmabuf_obj *obj =
container_of(kref, struct intel_vgpu_dmabuf_obj, kref);
struct intel_vgpu *vgpu = obj->vgpu;
- struct list_head *pos;
struct intel_vgpu_dmabuf_obj *dmabuf_obj;
if (vgpu && test_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status) &&
- !list_empty(&vgpu->dmabuf_obj_list_head)) {
- list_for_each(pos, &vgpu->dmabuf_obj_list_head) {
- dmabuf_obj = list_entry(pos, struct intel_vgpu_dmabuf_obj, list);
- if (dmabuf_obj == obj) {
- list_del(pos);
- idr_remove(&vgpu->object_idr,
- dmabuf_obj->dmabuf_id);
- kfree(dmabuf_obj->info);
- kfree(dmabuf_obj);
- break;
- }
+ !idr_is_empty(&vgpu->object_idr)) {
+ dmabuf_obj = idr_find(&vgpu->object_idr, obj->dmabuf_id);
+ if (dmabuf_obj) {
+ idr_remove(&vgpu->object_idr, obj->dmabuf_id);
+ kfree(dmabuf_obj->info);
+ kfree(dmabuf_obj);
}
} else {
/* Free the orphan dmabuf_objs here */
@@ -340,13 +334,12 @@ static struct intel_vgpu_dmabuf_obj *
pick_dmabuf_by_info(struct intel_vgpu *vgpu,
struct intel_vgpu_fb_info *latest_info)
{
- struct list_head *pos;
struct intel_vgpu_fb_info *fb_info;
struct intel_vgpu_dmabuf_obj *dmabuf_obj = NULL;
struct intel_vgpu_dmabuf_obj *ret = NULL;
+ int id;
- list_for_each(pos, &vgpu->dmabuf_obj_list_head) {
- dmabuf_obj = list_entry(pos, struct intel_vgpu_dmabuf_obj, list);
+ idr_for_each_entry(&vgpu->object_idr, dmabuf_obj, id) {
if (!dmabuf_obj->info)
continue;
@@ -366,24 +359,6 @@ pick_dmabuf_by_info(struct intel_vgpu *vgpu,
return ret;
}
-static struct intel_vgpu_dmabuf_obj *
-pick_dmabuf_by_num(struct intel_vgpu *vgpu, u32 id)
-{
- struct list_head *pos;
- struct intel_vgpu_dmabuf_obj *dmabuf_obj = NULL;
- struct intel_vgpu_dmabuf_obj *ret = NULL;
-
- list_for_each(pos, &vgpu->dmabuf_obj_list_head) {
- dmabuf_obj = list_entry(pos, struct intel_vgpu_dmabuf_obj, list);
- if (dmabuf_obj->dmabuf_id == id) {
- ret = dmabuf_obj;
- break;
- }
- }
-
- return ret;
-}
-
static void update_fb_info(struct vfio_device_gfx_plane_info *gvt_dmabuf,
struct intel_vgpu_fb_info *fb_info)
{
@@ -477,11 +452,6 @@ int intel_vgpu_query_plane(struct intel_vgpu *vgpu, void *args)
update_fb_info(gfx_plane_info, &fb_info);
- INIT_LIST_HEAD(&dmabuf_obj->list);
- mutex_lock(&vgpu->dmabuf_lock);
- list_add_tail(&dmabuf_obj->list, &vgpu->dmabuf_obj_list_head);
- mutex_unlock(&vgpu->dmabuf_lock);
-
gvt_dbg_dpy("vgpu%d: %s new dmabuf_obj ref %d, id %d\n", vgpu->id,
__func__, kref_read(&dmabuf_obj->kref), ret);
@@ -508,7 +478,7 @@ int intel_vgpu_get_dmabuf(struct intel_vgpu *vgpu, unsigned int dmabuf_id)
mutex_lock(&vgpu->dmabuf_lock);
- dmabuf_obj = pick_dmabuf_by_num(vgpu, dmabuf_id);
+ dmabuf_obj = idr_find(&vgpu->object_idr, dmabuf_id);
if (dmabuf_obj == NULL) {
gvt_vgpu_err("invalid dmabuf id:%d\n", dmabuf_id);
ret = -EINVAL;
@@ -570,23 +540,19 @@ int intel_vgpu_get_dmabuf(struct intel_vgpu *vgpu, unsigned int dmabuf_id)
void intel_vgpu_dmabuf_cleanup(struct intel_vgpu *vgpu)
{
- struct list_head *pos, *n;
struct intel_vgpu_dmabuf_obj *dmabuf_obj;
+ int id;
mutex_lock(&vgpu->dmabuf_lock);
- list_for_each_safe(pos, n, &vgpu->dmabuf_obj_list_head) {
- dmabuf_obj = list_entry(pos, struct intel_vgpu_dmabuf_obj, list);
+ idr_for_each_entry(&vgpu->object_idr, dmabuf_obj, id) {
dmabuf_obj->vgpu = NULL;
- idr_remove(&vgpu->object_idr, dmabuf_obj->dmabuf_id);
- list_del(pos);
-
+ idr_remove(&vgpu->object_idr, id);
/* dmabuf_obj might be freed in dmabuf_obj_put */
if (dmabuf_obj->initref) {
dmabuf_obj->initref = false;
dmabuf_obj_put(dmabuf_obj);
}
-
}
mutex_unlock(&vgpu->dmabuf_lock);
}
diff --git a/drivers/gpu/drm/i915/gvt/dmabuf.h b/drivers/gpu/drm/i915/gvt/dmabuf.h
index 3dcdb6570eda..93c0e00bdab9 100644
--- a/drivers/gpu/drm/i915/gvt/dmabuf.h
+++ b/drivers/gpu/drm/i915/gvt/dmabuf.h
@@ -57,7 +57,6 @@ struct intel_vgpu_dmabuf_obj {
__u32 dmabuf_id;
struct kref kref;
bool initref;
- struct list_head list;
};
int intel_vgpu_query_plane(struct intel_vgpu *vgpu, void *args);
diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
index 2d65800d8e93..1100c789f207 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.h
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
@@ -211,7 +211,6 @@ struct intel_vgpu {
struct dentry *debugfs;
- struct list_head dmabuf_obj_list_head;
struct mutex dmabuf_lock;
struct idr object_idr;
struct intel_vgpu_vblank_timer vblank_timer;
diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c
index 08ad1bd651f1..0a511cfef067 100644
--- a/drivers/gpu/drm/i915/gvt/vgpu.c
+++ b/drivers/gpu/drm/i915/gvt/vgpu.c
@@ -329,7 +329,6 @@ int intel_gvt_create_vgpu(struct intel_vgpu *vgpu,
vgpu->sched_ctl.weight = conf->weight;
mutex_init(&vgpu->vgpu_lock);
mutex_init(&vgpu->dmabuf_lock);
- INIT_LIST_HEAD(&vgpu->dmabuf_obj_list_head);
INIT_RADIX_TREE(&vgpu->page_track_tree, GFP_KERNEL);
idr_init_base(&vgpu->object_idr, 1);
intel_vgpu_init_cfg_space(vgpu, 1);
--
2.34.1
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