1 files changed, 246 insertions, 0 deletions
diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
new file mode 100644
index 000000000..1a82629bc
--- /dev/null
+++ b/drivers/gpu/drm/qxl/qxl_ttm.c
@@ -0,0 +1,246 @@
+/*
+ * Copyright 2013 Red Hat Inc.
+ *
+ * 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 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 HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Dave Airlie
+ *          Alon Levy
+ */
+
+#include <linux/delay.h>
+
+#include <drm/drm.h>
+#include <drm/drm_file.h>
+#include <drm/drm_debugfs.h>
+#include <drm/qxl_drm.h>
+#include <drm/ttm/ttm_bo.h>
+#include <drm/ttm/ttm_placement.h>
+#include <drm/ttm/ttm_range_manager.h>
+#include <drm/ttm/ttm_tt.h>
+
+#include "qxl_drv.h"
+#include "qxl_object.h"
+
+static struct qxl_device *qxl_get_qdev(struct ttm_device *bdev)
+{
+	struct qxl_mman *mman;
+	struct qxl_device *qdev;
+
+	mman = container_of(bdev, struct qxl_mman, bdev);
+	qdev = container_of(mman, struct qxl_device, mman);
+	return qdev;
+}
+
+static void qxl_evict_flags(struct ttm_buffer_object *bo,
+				struct ttm_placement *placement)
+{
+	struct qxl_bo *qbo;
+	static const struct ttm_place placements = {
+		.fpfn = 0,
+		.lpfn = 0,
+		.mem_type = TTM_PL_SYSTEM,
+		.flags = 0
+	};
+
+	if (!qxl_ttm_bo_is_qxl_bo(bo)) {
+		placement->placement = &placements;
+		placement->busy_placement = &placements;
+		placement->num_placement = 1;
+		placement->num_busy_placement = 1;
+		return;
+	}
+	qbo = to_qxl_bo(bo);
+	qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU);
+	*placement = qbo->placement;
+}
+
+int qxl_ttm_io_mem_reserve(struct ttm_device *bdev,
+			   struct ttm_resource *mem)
+{
+	struct qxl_device *qdev = qxl_get_qdev(bdev);
+
+	switch (mem->mem_type) {
+	case TTM_PL_SYSTEM:
+		/* system memory */
+		return 0;
+	case TTM_PL_VRAM:
+		mem->bus.is_iomem = true;
+		mem->bus.offset = (mem->start << PAGE_SHIFT) + qdev->vram_base;
+		mem->bus.caching = ttm_write_combined;
+		break;
+	case TTM_PL_PRIV:
+		mem->bus.is_iomem = true;
+		mem->bus.offset = (mem->start << PAGE_SHIFT) +
+			qdev->surfaceram_base;
+		mem->bus.caching = ttm_write_combined;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+/*
+ * TTM backend functions.
+ */
+static void qxl_ttm_backend_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
+{
+	ttm_tt_fini(ttm);
+	kfree(ttm);
+}
+
+static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
+					uint32_t page_flags)
+{
+	struct ttm_tt *ttm;
+
+	ttm = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
+	if (ttm == NULL)
+		return NULL;
+	if (ttm_tt_init(ttm, bo, page_flags, ttm_cached, 0)) {
+		kfree(ttm);
+		return NULL;
+	}
+	return ttm;
+}
+
+static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
+			       struct ttm_resource *new_mem)
+{
+	struct qxl_bo *qbo;
+	struct qxl_device *qdev;
+
+	if (!qxl_ttm_bo_is_qxl_bo(bo) || !bo->resource)
+		return;
+	qbo = to_qxl_bo(bo);
+	qdev = to_qxl(qbo->tbo.base.dev);
+
+	if (bo->resource->mem_type == TTM_PL_PRIV && qbo->surface_id)
+		qxl_surface_evict(qdev, qbo, new_mem ? true : false);
+}
+
+static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
+		       struct ttm_operation_ctx *ctx,
+		       struct ttm_resource *new_mem,
+		       struct ttm_place *hop)
+{
+	struct ttm_resource *old_mem = bo->resource;
+	int ret;
+
+	if (!old_mem) {
+		if (new_mem->mem_type != TTM_PL_SYSTEM) {
+			hop->mem_type = TTM_PL_SYSTEM;
+			hop->flags = TTM_PL_FLAG_TEMPORARY;
+			return -EMULTIHOP;
+		}
+
+		ttm_bo_move_null(bo, new_mem);
+		return 0;
+	}
+
+	qxl_bo_move_notify(bo, new_mem);
+
+	ret = ttm_bo_wait_ctx(bo, ctx);
+	if (ret)
+		return ret;
+
+	if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
+		ttm_bo_move_null(bo, new_mem);
+		return 0;
+	}
+	return ttm_bo_move_memcpy(bo, ctx, new_mem);
+}
+
+static void qxl_bo_delete_mem_notify(struct ttm_buffer_object *bo)
+{
+	qxl_bo_move_notify(bo, NULL);
+}
+
+static struct ttm_device_funcs qxl_bo_driver = {
+	.ttm_tt_create = &qxl_ttm_tt_create,
+	.ttm_tt_destroy = &qxl_ttm_backend_destroy,
+	.eviction_valuable = ttm_bo_eviction_valuable,
+	.evict_flags = &qxl_evict_flags,
+	.move = &qxl_bo_move,
+	.io_mem_reserve = &qxl_ttm_io_mem_reserve,
+	.delete_mem_notify = &qxl_bo_delete_mem_notify,
+};
+
+static int qxl_ttm_init_mem_type(struct qxl_device *qdev,
+				 unsigned int type,
+				 uint64_t size)
+{
+	return ttm_range_man_init(&qdev->mman.bdev, type, false, size);
+}
+
+int qxl_ttm_init(struct qxl_device *qdev)
+{
+	int r;
+	int num_io_pages; /* != rom->num_io_pages, we include surface0 */
+
+	/* No others user of address space so set it to 0 */
+	r = ttm_device_init(&qdev->mman.bdev, &qxl_bo_driver, NULL,
+			    qdev->ddev.anon_inode->i_mapping,
+			    qdev->ddev.vma_offset_manager,
+			    false, false);
+	if (r) {
+		DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
+		return r;
+	}
+	/* NOTE: this includes the framebuffer (aka surface 0) */
+	num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
+	r = qxl_ttm_init_mem_type(qdev, TTM_PL_VRAM, num_io_pages);
+	if (r) {
+		DRM_ERROR("Failed initializing VRAM heap.\n");
+		return r;
+	}
+	r = qxl_ttm_init_mem_type(qdev, TTM_PL_PRIV,
+				  qdev->surfaceram_size / PAGE_SIZE);
+	if (r) {
+		DRM_ERROR("Failed initializing Surfaces heap.\n");
+		return r;
+	}
+	DRM_INFO("qxl: %uM of VRAM memory size\n",
+		 (unsigned int)qdev->vram_size / (1024 * 1024));
+	DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
+		 ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
+	DRM_INFO("qxl: %uM of Surface memory size\n",
+		 (unsigned int)qdev->surfaceram_size / (1024 * 1024));
+	return 0;
+}
+
+void qxl_ttm_fini(struct qxl_device *qdev)
+{
+	ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_VRAM);
+	ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_PRIV);
+	ttm_device_fini(&qdev->mman.bdev);
+	DRM_INFO("qxl: ttm finalized\n");
+}
+
+void qxl_ttm_debugfs_init(struct qxl_device *qdev)
+{
+#if defined(CONFIG_DEBUG_FS)
+	ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev,
+							     TTM_PL_VRAM),
+					    qdev->ddev.primary->debugfs_root, "qxl_mem_mm");
+	ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev,
+							     TTM_PL_PRIV),
+					    qdev->ddev.primary->debugfs_root, "qxl_surf_mm");
+#endif
+}