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UPSTREAM: drm/virtio: Use IDAs more efficiently

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0-based IDAs are more efficient than any other base.  Convert the
1-based IDAs to be 0-based.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20181030165352.13065-2-willy@infradead.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit 2ae7f165c0)
Signed-off-by: Greg Hartman <ghartman@google.com>
BUG: 139386237
Change-Id: I163fea3a31358bbaa478c1ce49b42de413ddc9d5
This commit is contained in:
Matthew Wilcox 2018-10-30 09:53:52 -07:00 committed by Alistair Delva
parent d620c93af6
commit 39a21dedcf
2 changed files with 6 additions and 5 deletions
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5
drivers/gpu/drm/virtio/virtgpu_kms.c
View File

@ -55,10 +55,11 @@ static void virtio_gpu_config_changed_work_func(struct work_struct *work)
static int virtio_gpu_context_create(struct virtio_gpu_device *vgdev,
uint32_t nlen, const char *name)
{
int handle = ida_alloc_min(&vgdev->ctx_id_ida, 1, GFP_KERNEL);
int handle = ida_alloc(&vgdev->ctx_id_ida, GFP_KERNEL);
if (handle < 0)
return handle;
handle += 1;
virtio_gpu_cmd_context_create(vgdev, handle, nlen, name);
return handle;
}
@ -67,7 +68,7 @@ static void virtio_gpu_context_destroy(struct virtio_gpu_device *vgdev,
uint32_t ctx_id)
{
virtio_gpu_cmd_context_destroy(vgdev, ctx_id);
ida_free(&vgdev->ctx_id_ida, ctx_id);
ida_free(&vgdev->ctx_id_ida, ctx_id - 1);
}
static void virtio_gpu_init_vq(struct virtio_gpu_queue *vgvq,

6
drivers/gpu/drm/virtio/virtgpu_object.c
View File

@ -28,18 +28,18 @@
static int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
uint32_t *resid)
{
int handle = ida_alloc_min(&vgdev->resource_ida, 1, GFP_KERNEL);
int handle = ida_alloc(&vgdev->resource_ida, GFP_KERNEL);
if (handle < 0)
return handle;
*resid = handle;
*resid = handle + 1;
return 0;
}
static void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id)
{
ida_free(&vgdev->resource_ida, id);
ida_free(&vgdev->resource_ida, id - 1);
}
static void virtio_gpu_ttm_bo_destroy(struct ttm_buffer_object *tbo)