qxl_ttm.c

  1/*
  2 * Copyright 2013 Red Hat Inc.
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the "Software"),
  6 * to deal in the Software without restriction, including without limitation
  7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8 * and/or sell copies of the Software, and to permit persons to whom the
  9 * Software is furnished to do so, subject to the following conditions:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 20 * OTHER DEALINGS IN THE SOFTWARE.
 21 *
 22 * Authors: Dave Airlie
 23 *          Alon Levy
 24 */
 25
 26#include <linux/delay.h>
 27
 28#include <drm/drm.h>
 29#include <drm/drm_file.h>
 30#include <drm/drm_debugfs.h>
 31#include <drm/drm_print.h>
 32#include <drm/qxl_drm.h>
 33#include <drm/ttm/ttm_bo.h>
 34#include <drm/ttm/ttm_placement.h>
 35#include <drm/ttm/ttm_range_manager.h>
 36#include <drm/ttm/ttm_tt.h>
 37
 38#include "qxl_drv.h"
 39#include "qxl_object.h"
 40
 41static struct qxl_device *qxl_get_qdev(struct ttm_device *bdev)
 42{
 43	struct qxl_mman *mman;
 44	struct qxl_device *qdev;
 45
 46	mman = container_of(bdev, struct qxl_mman, bdev);
 47	qdev = container_of(mman, struct qxl_device, mman);
 48	return qdev;
 49}
 50
 51static void qxl_evict_flags(struct ttm_buffer_object *bo,
 52				struct ttm_placement *placement)
 53{
 54	struct qxl_bo *qbo;
 55	static const struct ttm_place placements = {
 56		.fpfn = 0,
 57		.lpfn = 0,
 58		.mem_type = TTM_PL_SYSTEM,
 59		.flags = 0
 60	};
 61
 62	if (!qxl_ttm_bo_is_qxl_bo(bo)) {
 63		placement->placement = &placements;
 64		placement->num_placement = 1;
 65		return;
 66	}
 67	qbo = to_qxl_bo(bo);
 68	qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU);
 69	*placement = qbo->placement;
 70}
 71
 72int qxl_ttm_io_mem_reserve(struct ttm_device *bdev,
 73			   struct ttm_resource *mem)
 74{
 75	struct qxl_device *qdev = qxl_get_qdev(bdev);
 76
 77	switch (mem->mem_type) {
 78	case TTM_PL_SYSTEM:
 79		/* system memory */
 80		return 0;
 81	case TTM_PL_VRAM:
 82		mem->bus.is_iomem = true;
 83		mem->bus.offset = (mem->start << PAGE_SHIFT) + qdev->vram_base;
 84		mem->bus.caching = ttm_write_combined;
 85		break;
 86	case TTM_PL_PRIV:
 87		mem->bus.is_iomem = true;
 88		mem->bus.offset = (mem->start << PAGE_SHIFT) +
 89			qdev->surfaceram_base;
 90		mem->bus.caching = ttm_write_combined;
 91		break;
 92	default:
 93		return -EINVAL;
 94	}
 95	return 0;
 96}
 97
 98/*
 99 * TTM backend functions.
100 */
101static void qxl_ttm_backend_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
102{
103	ttm_tt_fini(ttm);
104	kfree(ttm);
105}
106
107static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
108					uint32_t page_flags)
109{
110	struct ttm_tt *ttm;
111
112	ttm = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
113	if (ttm == NULL)
114		return NULL;
115	if (ttm_tt_init(ttm, bo, page_flags, ttm_cached, 0)) {
116		kfree(ttm);
117		return NULL;
118	}
119	return ttm;
120}
121
122static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
123			       struct ttm_resource *new_mem)
124{
125	struct qxl_bo *qbo;
126	struct qxl_device *qdev;
127
128	if (!qxl_ttm_bo_is_qxl_bo(bo) || !bo->resource)
129		return;
130	qbo = to_qxl_bo(bo);
131	qdev = to_qxl(qbo->tbo.base.dev);
132
133	if (bo->resource->mem_type == TTM_PL_PRIV && qbo->surface_id)
134		qxl_surface_evict(qdev, qbo, new_mem ? true : false);
135}
136
137static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
138		       struct ttm_operation_ctx *ctx,
139		       struct ttm_resource *new_mem,
140		       struct ttm_place *hop)
141{
142	struct ttm_resource *old_mem = bo->resource;
143	int ret;
144
145	if (!old_mem) {
146		if (new_mem->mem_type != TTM_PL_SYSTEM) {
147			hop->mem_type = TTM_PL_SYSTEM;
148			hop->flags = TTM_PL_FLAG_TEMPORARY;
149			return -EMULTIHOP;
150		}
151
152		ttm_bo_move_null(bo, new_mem);
153		return 0;
154	}
155
156	qxl_bo_move_notify(bo, new_mem);
157
158	ret = ttm_bo_wait_ctx(bo, ctx);
159	if (ret)
160		return ret;
161
162	if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
163		ttm_bo_move_null(bo, new_mem);
164		return 0;
165	}
166	return ttm_bo_move_memcpy(bo, ctx, new_mem);
167}
168
169static void qxl_bo_delete_mem_notify(struct ttm_buffer_object *bo)
170{
171	qxl_bo_move_notify(bo, NULL);
172}
173
174static struct ttm_device_funcs qxl_bo_driver = {
175	.ttm_tt_create = &qxl_ttm_tt_create,
176	.ttm_tt_destroy = &qxl_ttm_backend_destroy,
177	.eviction_valuable = ttm_bo_eviction_valuable,
178	.evict_flags = &qxl_evict_flags,
179	.move = &qxl_bo_move,
180	.io_mem_reserve = &qxl_ttm_io_mem_reserve,
181	.delete_mem_notify = &qxl_bo_delete_mem_notify,
182};
183
184static int qxl_ttm_init_mem_type(struct qxl_device *qdev,
185				 unsigned int type,
186				 uint64_t size)
187{
188	return ttm_range_man_init(&qdev->mman.bdev, type, false, size);
189}
190
191int qxl_ttm_init(struct qxl_device *qdev)
192{
193	int r;
194	int num_io_pages; /* != rom->num_io_pages, we include surface0 */
195
196	/* No others user of address space so set it to 0 */
197	r = ttm_device_init(&qdev->mman.bdev, &qxl_bo_driver, NULL,
198			    qdev->ddev.anon_inode->i_mapping,
199			    qdev->ddev.vma_offset_manager,
200			    0);
201	if (r) {
202		DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
203		return r;
204	}
205	/* NOTE: this includes the framebuffer (aka surface 0) */
206	num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
207	r = qxl_ttm_init_mem_type(qdev, TTM_PL_VRAM, num_io_pages);
208	if (r) {
209		DRM_ERROR("Failed initializing VRAM heap.\n");
210		return r;
211	}
212	r = qxl_ttm_init_mem_type(qdev, TTM_PL_PRIV,
213				  qdev->surfaceram_size / PAGE_SIZE);
214	if (r) {
215		DRM_ERROR("Failed initializing Surfaces heap.\n");
216		return r;
217	}
218	DRM_INFO("qxl: %uM of VRAM memory size\n",
219		 (unsigned int)qdev->vram_size / (1024 * 1024));
220	DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
221		 ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
222	DRM_INFO("qxl: %uM of Surface memory size\n",
223		 (unsigned int)qdev->surfaceram_size / (1024 * 1024));
224	return 0;
225}
226
227void qxl_ttm_fini(struct qxl_device *qdev)
228{
229	ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_VRAM);
230	ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_PRIV);
231	ttm_device_fini(&qdev->mman.bdev);
232	DRM_INFO("qxl: ttm finalized\n");
233}
234
235void qxl_ttm_debugfs_init(struct qxl_device *qdev)
236{
237#if defined(CONFIG_DEBUG_FS)
238	ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev,
239							     TTM_PL_VRAM),
240					    qdev->ddev.primary->debugfs_root, "qxl_mem_mm");
241	ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev,
242							     TTM_PL_PRIV),
243					    qdev->ddev.primary->debugfs_root, "qxl_surf_mm");
244#endif
245}