From f5985bf9cadd4e3ed8d5d9a9cbbb2e39cdb81cd9 Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Wed, 1 Mar 2017 15:09:08 +0100 Subject: [PATCH] drm: virtio: use kmem_cache Just use kmem_cache instead of rolling our own, limited implementation. Signed-off-by: Gerd Hoffmann Reviewed-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1488377348-5006-1-git-send-email-kraxel@redhat.com --- drivers/gpu/drm/virtio/virtgpu_drv.h | 4 +- drivers/gpu/drm/virtio/virtgpu_vq.c | 57 +++++----------------------- 2 files changed, 11 insertions(+), 50 deletions(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h index d59f68936306..93900a83dced 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -178,9 +178,7 @@ struct virtio_gpu_device { struct virtio_gpu_queue ctrlq; struct virtio_gpu_queue cursorq; - struct list_head free_vbufs; - spinlock_t free_vbufs_lock; - void *vbufs; + struct kmem_cache *vbufs; bool vqs_ready; struct idr resource_idr; diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c index 43ea0dc957d2..472e34986a44 100644 --- a/drivers/gpu/drm/virtio/virtgpu_vq.c +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c @@ -74,51 +74,19 @@ void virtio_gpu_cursor_ack(struct virtqueue *vq) int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev) { - struct virtio_gpu_vbuffer *vbuf; - int i, size, count = 16; - void *ptr; - - INIT_LIST_HEAD(&vgdev->free_vbufs); - spin_lock_init(&vgdev->free_vbufs_lock); - count += virtqueue_get_vring_size(vgdev->ctrlq.vq); - count += virtqueue_get_vring_size(vgdev->cursorq.vq); - size = count * VBUFFER_SIZE; - DRM_INFO("virtio vbuffers: %d bufs, %zdB each, %dkB total.\n", - count, VBUFFER_SIZE, size / 1024); - - vgdev->vbufs = kzalloc(size, GFP_KERNEL); + vgdev->vbufs = kmem_cache_create("virtio-gpu-vbufs", + VBUFFER_SIZE, + __alignof__(struct virtio_gpu_vbuffer), + 0, NULL); if (!vgdev->vbufs) return -ENOMEM; - - for (i = 0, ptr = vgdev->vbufs; - i < count; - i++, ptr += VBUFFER_SIZE) { - vbuf = ptr; - list_add(&vbuf->list, &vgdev->free_vbufs); - } return 0; } void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev) { - struct virtio_gpu_vbuffer *vbuf; - int i, count = 0; - - count += virtqueue_get_vring_size(vgdev->ctrlq.vq); - count += virtqueue_get_vring_size(vgdev->cursorq.vq); - - spin_lock(&vgdev->free_vbufs_lock); - for (i = 0; i < count; i++) { - if (WARN_ON(list_empty(&vgdev->free_vbufs))) { - spin_unlock(&vgdev->free_vbufs_lock); - return; - } - vbuf = list_first_entry(&vgdev->free_vbufs, - struct virtio_gpu_vbuffer, list); - list_del(&vbuf->list); - } - spin_unlock(&vgdev->free_vbufs_lock); - kfree(vgdev->vbufs); + kmem_cache_destroy(vgdev->vbufs); + vgdev->vbufs = NULL; } static struct virtio_gpu_vbuffer* @@ -128,12 +96,9 @@ virtio_gpu_get_vbuf(struct virtio_gpu_device *vgdev, { struct virtio_gpu_vbuffer *vbuf; - spin_lock(&vgdev->free_vbufs_lock); - BUG_ON(list_empty(&vgdev->free_vbufs)); - vbuf = list_first_entry(&vgdev->free_vbufs, - struct virtio_gpu_vbuffer, list); - list_del(&vbuf->list); - spin_unlock(&vgdev->free_vbufs_lock); + vbuf = kmem_cache_alloc(vgdev->vbufs, GFP_KERNEL); + if (IS_ERR(vbuf)) + return ERR_CAST(vbuf); memset(vbuf, 0, VBUFFER_SIZE); BUG_ON(size > MAX_INLINE_CMD_SIZE); @@ -208,9 +173,7 @@ static void free_vbuf(struct virtio_gpu_device *vgdev, if (vbuf->resp_size > MAX_INLINE_RESP_SIZE) kfree(vbuf->resp_buf); kfree(vbuf->data_buf); - spin_lock(&vgdev->free_vbufs_lock); - list_add(&vbuf->list, &vgdev->free_vbufs); - spin_unlock(&vgdev->free_vbufs_lock); + kmem_cache_free(vgdev->vbufs, vbuf); } static void reclaim_vbufs(struct virtqueue *vq, struct list_head *reclaim_list) -- 2.20.1