X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fgpu%2Fdrm%2Fvirtio%2Fvirtgpu_object.c;fp=kernel%2Fdrivers%2Fgpu%2Fdrm%2Fvirtio%2Fvirtgpu_object.c;h=f300eba95bb1bff32ad8e9be2a8250779ec255b6;hb=e09b41010ba33a20a87472ee821fa407a5b8da36;hp=0000000000000000000000000000000000000000;hpb=f93b97fd65072de626c074dbe099a1fff05ce060;p=kvmfornfv.git

diff --git a/kernel/drivers/gpu/drm/virtio/virtgpu_object.c b/kernel/drivers/gpu/drm/virtio/virtgpu_object.c
new file mode 100644
index 000000000..f300eba95
--- /dev/null
+++ b/kernel/drivers/gpu/drm/virtio/virtgpu_object.c
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2015 Red Hat, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "virtgpu_drv.h"
+
+static void virtio_gpu_ttm_bo_destroy(struct ttm_buffer_object *tbo)
+{
+	struct virtio_gpu_object *bo;
+	struct virtio_gpu_device *vgdev;
+
+	bo = container_of(tbo, struct virtio_gpu_object, tbo);
+	vgdev = (struct virtio_gpu_device *)bo->gem_base.dev->dev_private;
+
+	if (bo->hw_res_handle)
+		virtio_gpu_cmd_unref_resource(vgdev, bo->hw_res_handle);
+	if (bo->pages)
+		virtio_gpu_object_free_sg_table(bo);
+	drm_gem_object_release(&bo->gem_base);
+	kfree(bo);
+}
+
+static void virtio_gpu_init_ttm_placement(struct virtio_gpu_object *vgbo,
+					  bool pinned)
+{
+	u32 c = 1;
+	u32 pflag = pinned ? TTM_PL_FLAG_NO_EVICT : 0;
+
+	vgbo->placement.placement = &vgbo->placement_code;
+	vgbo->placement.busy_placement = &vgbo->placement_code;
+	vgbo->placement_code.fpfn = 0;
+	vgbo->placement_code.lpfn = 0;
+	vgbo->placement_code.flags =
+		TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT | pflag;
+	vgbo->placement.num_placement = c;
+	vgbo->placement.num_busy_placement = c;
+
+}
+
+int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
+			     unsigned long size, bool kernel, bool pinned,
+			     struct virtio_gpu_object **bo_ptr)
+{
+	struct virtio_gpu_object *bo;
+	enum ttm_bo_type type;
+	size_t acc_size;
+	int ret;
+
+	if (kernel)
+		type = ttm_bo_type_kernel;
+	else
+		type = ttm_bo_type_device;
+	*bo_ptr = NULL;
+
+	acc_size = ttm_bo_dma_acc_size(&vgdev->mman.bdev, size,
+				       sizeof(struct virtio_gpu_object));
+
+	bo = kzalloc(sizeof(struct virtio_gpu_object), GFP_KERNEL);
+	if (bo == NULL)
+		return -ENOMEM;
+	size = roundup(size, PAGE_SIZE);
+	ret = drm_gem_object_init(vgdev->ddev, &bo->gem_base, size);
+	if (ret != 0)
+		return ret;
+	bo->dumb = false;
+	virtio_gpu_init_ttm_placement(bo, pinned);
+
+	ret = ttm_bo_init(&vgdev->mman.bdev, &bo->tbo, size, type,
+			  &bo->placement, 0, !kernel, NULL, acc_size,
+			  NULL, NULL, &virtio_gpu_ttm_bo_destroy);
+	/* ttm_bo_init failure will call the destroy */
+	if (ret != 0)
+		return ret;
+
+	*bo_ptr = bo;
+	return 0;
+}
+
+int virtio_gpu_object_kmap(struct virtio_gpu_object *bo, void **ptr)
+{
+	bool is_iomem;
+	int r;
+
+	if (bo->vmap) {
+		if (ptr)
+			*ptr = bo->vmap;
+		return 0;
+	}
+	r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
+	if (r)
+		return r;
+	bo->vmap = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
+	if (ptr)
+		*ptr = bo->vmap;
+	return 0;
+}
+
+int virtio_gpu_object_get_sg_table(struct virtio_gpu_device *qdev,
+				   struct virtio_gpu_object *bo)
+{
+	int ret;
+	struct page **pages = bo->tbo.ttm->pages;
+	int nr_pages = bo->tbo.num_pages;
+
+	/* wtf swapping */
+	if (bo->pages)
+		return 0;
+
+	if (bo->tbo.ttm->state == tt_unpopulated)
+		bo->tbo.ttm->bdev->driver->ttm_tt_populate(bo->tbo.ttm);
+	bo->pages = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
+	if (!bo->pages)
+		goto out;
+
+	ret = sg_alloc_table_from_pages(bo->pages, pages, nr_pages, 0,
+					nr_pages << PAGE_SHIFT, GFP_KERNEL);
+	if (ret)
+		goto out;
+	return 0;
+out:
+	kfree(bo->pages);
+	bo->pages = NULL;
+	return -ENOMEM;
+}
+
+void virtio_gpu_object_free_sg_table(struct virtio_gpu_object *bo)
+{
+	sg_free_table(bo->pages);
+	kfree(bo->pages);
+	bo->pages = NULL;
+}
+
+int virtio_gpu_object_wait(struct virtio_gpu_object *bo, bool no_wait)
+{
+	int r;
+
+	r = ttm_bo_reserve(&bo->tbo, true, no_wait, false, NULL);
+	if (unlikely(r != 0))
+		return r;
+	r = ttm_bo_wait(&bo->tbo, true, true, no_wait);
+	ttm_bo_unreserve(&bo->tbo);
+	return r;
+}
+