From 6c1cd97bdaffa2ae1dbdc8a0857931308ac647cd Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Fri, 19 Oct 2018 08:18:47 +0200 Subject: [PATCH] drm/virtio: fix resource id handling Move virtio_gpu_resource_id_{get,put} to virtgpu_object.c and make them static. Allocate and free the id on creation and destroy, drop all other calls. That way objects have a valid handle for the whole lifetime of the object. Also fixes ids leaking. Worst offender are dumb buffers, and I think some error paths too. Signed-off-by: Gerd Hoffmann Reviewed-by: Dave Airlie Link: http://patchwork.freedesktop.org/patch/msgid/20181019061847.18958-7-kraxel@redhat.com --- drivers/gpu/drm/virtio/virtgpu_drv.h | 3 --- drivers/gpu/drm/virtio/virtgpu_fb.c | 1 - drivers/gpu/drm/virtio/virtgpu_gem.c | 1 - drivers/gpu/drm/virtio/virtgpu_ioctl.c | 1 - drivers/gpu/drm/virtio/virtgpu_object.c | 23 +++++++++++++++++++++++ drivers/gpu/drm/virtio/virtgpu_vq.c | 20 -------------------- 6 files changed, 23 insertions(+), 26 deletions(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h index c6b0a938bac5..78ad8f58edff 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -260,9 +260,6 @@ int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *qfb, /* virtio vg */ int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev); void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev); -void virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev, - uint32_t *resid); -void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id); void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev, struct virtio_gpu_object *bo, uint32_t format, diff --git a/drivers/gpu/drm/virtio/virtgpu_fb.c b/drivers/gpu/drm/virtio/virtgpu_fb.c index c22a8246b62d..fb1cc8b2f119 100644 --- a/drivers/gpu/drm/virtio/virtgpu_fb.c +++ b/drivers/gpu/drm/virtio/virtgpu_fb.c @@ -231,7 +231,6 @@ static int virtio_gpufb_create(struct drm_fb_helper *helper, if (IS_ERR(obj)) return PTR_ERR(obj); - virtio_gpu_resource_id_get(vgdev, &obj->hw_res_handle); virtio_gpu_cmd_create_resource(vgdev, obj, format, mode_cmd.width, mode_cmd.height); diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c index 665d18a49d42..f06586393974 100644 --- a/drivers/gpu/drm/virtio/virtgpu_gem.c +++ b/drivers/gpu/drm/virtio/virtgpu_gem.c @@ -103,7 +103,6 @@ int virtio_gpu_mode_dumb_create(struct drm_file *file_priv, format = virtio_gpu_translate_format(DRM_FORMAT_HOST_XRGB8888); obj = gem_to_virtio_gpu_obj(gobj); - virtio_gpu_resource_id_get(vgdev, &obj->hw_res_handle); virtio_gpu_cmd_create_resource(vgdev, obj, format, args->width, args->height); diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c index 6179d9316763..bc5afa4f906e 100644 --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c @@ -253,7 +253,6 @@ static int virtio_gpu_resource_create_ioctl(struct drm_device *dev, void *data, if (IS_ERR(qobj)) return PTR_ERR(qobj); obj = &qobj->gem_base; - virtio_gpu_resource_id_get(vgdev, &qobj->hw_res_handle); if (!vgdev->has_virgl_3d) { virtio_gpu_cmd_create_resource(vgdev, qobj, rc->format, diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c index 6611c487d798..8bd1ebe13b62 100644 --- a/drivers/gpu/drm/virtio/virtgpu_object.c +++ b/drivers/gpu/drm/virtio/virtgpu_object.c @@ -25,6 +25,26 @@ #include "virtgpu_drv.h" +static void virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev, + uint32_t *resid) +{ + int handle; + + idr_preload(GFP_KERNEL); + spin_lock(&vgdev->resource_idr_lock); + handle = idr_alloc(&vgdev->resource_idr, NULL, 1, 0, GFP_NOWAIT); + spin_unlock(&vgdev->resource_idr_lock); + idr_preload_end(); + *resid = handle; +} + +static void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id) +{ + spin_lock(&vgdev->resource_idr_lock); + idr_remove(&vgdev->resource_idr, id); + spin_unlock(&vgdev->resource_idr_lock); +} + static void virtio_gpu_ttm_bo_destroy(struct ttm_buffer_object *tbo) { struct virtio_gpu_object *bo; @@ -40,6 +60,7 @@ static void virtio_gpu_ttm_bo_destroy(struct ttm_buffer_object *tbo) if (bo->vmap) virtio_gpu_object_kunmap(bo); drm_gem_object_release(&bo->gem_base); + virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle); kfree(bo); } @@ -81,9 +102,11 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev, bo = kzalloc(sizeof(struct virtio_gpu_object), GFP_KERNEL); if (bo == NULL) return -ENOMEM; + virtio_gpu_resource_id_get(vgdev, &bo->hw_res_handle); size = roundup(size, PAGE_SIZE); ret = drm_gem_object_init(vgdev->ddev, &bo->gem_base, size); if (ret != 0) { + virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle); kfree(bo); return ret; } diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c index ea3d13793d60..d2861da2bbc9 100644 --- a/drivers/gpu/drm/virtio/virtgpu_vq.c +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c @@ -38,26 +38,6 @@ + MAX_INLINE_CMD_SIZE \ + MAX_INLINE_RESP_SIZE) -void virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev, - uint32_t *resid) -{ - int handle; - - idr_preload(GFP_KERNEL); - spin_lock(&vgdev->resource_idr_lock); - handle = idr_alloc(&vgdev->resource_idr, NULL, 1, 0, GFP_NOWAIT); - spin_unlock(&vgdev->resource_idr_lock); - idr_preload_end(); - *resid = handle; -} - -void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id) -{ - spin_lock(&vgdev->resource_idr_lock); - idr_remove(&vgdev->resource_idr, id); - spin_unlock(&vgdev->resource_idr_lock); -} - void virtio_gpu_ctrl_ack(struct virtqueue *vq) { struct drm_device *dev = vq->vdev->priv; -- 2.30.2