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/qxl_drm.h>
32#include <drm/ttm/ttm_bo.h>
33#include <drm/ttm/ttm_placement.h>
34#include <drm/ttm/ttm_range_manager.h>
35#include <drm/ttm/ttm_tt.h>
36
37#include "qxl_drv.h"
38#include "qxl_object.h"
39
40static struct qxl_device *qxl_get_qdev(struct ttm_device *bdev)
41{
42 struct qxl_mman *mman;
43 struct qxl_device *qdev;
44
45 mman = container_of(bdev, struct qxl_mman, bdev);
46 qdev = container_of(mman, struct qxl_device, mman);
47 return qdev;
48}
49
50static void qxl_evict_flags(struct ttm_buffer_object *bo,
51 struct ttm_placement *placement)
52{
53 struct qxl_bo *qbo;
54 static const struct ttm_place placements = {
55 .fpfn = 0,
56 .lpfn = 0,
57 .mem_type = TTM_PL_SYSTEM,
58 .flags = 0
59 };
60
61 if (!qxl_ttm_bo_is_qxl_bo(bo)) {
62 placement->placement = &placements;
63 placement->num_placement = 1;
64 return;
65 }
66 qbo = to_qxl_bo(bo);
67 qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU);
68 *placement = qbo->placement;
69}
70
71int qxl_ttm_io_mem_reserve(struct ttm_device *bdev,
72 struct ttm_resource *mem)
73{
74 struct qxl_device *qdev = qxl_get_qdev(bdev);
75
76 switch (mem->mem_type) {
77 case TTM_PL_SYSTEM:
78 /* system memory */
79 return 0;
80 case TTM_PL_VRAM:
81 mem->bus.is_iomem = true;
82 mem->bus.offset = (mem->start << PAGE_SHIFT) + qdev->vram_base;
83 mem->bus.caching = ttm_write_combined;
84 break;
85 case TTM_PL_PRIV:
86 mem->bus.is_iomem = true;
87 mem->bus.offset = (mem->start << PAGE_SHIFT) +
88 qdev->surfaceram_base;
89 mem->bus.caching = ttm_write_combined;
90 break;
91 default:
92 return -EINVAL;
93 }
94 return 0;
95}
96
97/*
98 * TTM backend functions.
99 */
100static void qxl_ttm_backend_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
101{
102 ttm_tt_fini(ttm);
103 kfree(objp: ttm);
104}
105
106static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
107 uint32_t page_flags)
108{
109 struct ttm_tt *ttm;
110
111 ttm = kzalloc(size: sizeof(struct ttm_tt), GFP_KERNEL);
112 if (ttm == NULL)
113 return NULL;
114 if (ttm_tt_init(ttm, bo, page_flags, caching: ttm_cached, extra_pages: 0)) {
115 kfree(objp: ttm);
116 return NULL;
117 }
118 return ttm;
119}
120
121static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
122 struct ttm_resource *new_mem)
123{
124 struct qxl_bo *qbo;
125 struct qxl_device *qdev;
126
127 if (!qxl_ttm_bo_is_qxl_bo(bo) || !bo->resource)
128 return;
129 qbo = to_qxl_bo(bo);
130 qdev = to_qxl(qbo->tbo.base.dev);
131
132 if (bo->resource->mem_type == TTM_PL_PRIV && qbo->surface_id)
133 qxl_surface_evict(qdev, surf: qbo, freeing: new_mem ? true : false);
134}
135
136static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
137 struct ttm_operation_ctx *ctx,
138 struct ttm_resource *new_mem,
139 struct ttm_place *hop)
140{
141 struct ttm_resource *old_mem = bo->resource;
142 int ret;
143
144 if (!old_mem) {
145 if (new_mem->mem_type != TTM_PL_SYSTEM) {
146 hop->mem_type = TTM_PL_SYSTEM;
147 hop->flags = TTM_PL_FLAG_TEMPORARY;
148 return -EMULTIHOP;
149 }
150
151 ttm_bo_move_null(bo, new_mem);
152 return 0;
153 }
154
155 qxl_bo_move_notify(bo, new_mem);
156
157 ret = ttm_bo_wait_ctx(bo, ctx);
158 if (ret)
159 return ret;
160
161 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
162 ttm_bo_move_null(bo, new_mem);
163 return 0;
164 }
165 return ttm_bo_move_memcpy(bo, ctx, new_mem);
166}
167
168static void qxl_bo_delete_mem_notify(struct ttm_buffer_object *bo)
169{
170 qxl_bo_move_notify(bo, NULL);
171}
172
173static struct ttm_device_funcs qxl_bo_driver = {
174 .ttm_tt_create = &qxl_ttm_tt_create,
175 .ttm_tt_destroy = &qxl_ttm_backend_destroy,
176 .eviction_valuable = ttm_bo_eviction_valuable,
177 .evict_flags = &qxl_evict_flags,
178 .move = &qxl_bo_move,
179 .io_mem_reserve = &qxl_ttm_io_mem_reserve,
180 .delete_mem_notify = &qxl_bo_delete_mem_notify,
181};
182
183static int qxl_ttm_init_mem_type(struct qxl_device *qdev,
184 unsigned int type,
185 uint64_t size)
186{
187 return ttm_range_man_init(bdev: &qdev->mman.bdev, type, use_tt: false, p_size: size);
188}
189
190int qxl_ttm_init(struct qxl_device *qdev)
191{
192 int r;
193 int num_io_pages; /* != rom->num_io_pages, we include surface0 */
194
195 /* No others user of address space so set it to 0 */
196 r = ttm_device_init(bdev: &qdev->mman.bdev, funcs: &qxl_bo_driver, NULL,
197 mapping: qdev->ddev.anon_inode->i_mapping,
198 vma_manager: qdev->ddev.vma_offset_manager,
199 use_dma_alloc: false, use_dma32: false);
200 if (r) {
201 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
202 return r;
203 }
204 /* NOTE: this includes the framebuffer (aka surface 0) */
205 num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
206 r = qxl_ttm_init_mem_type(qdev, TTM_PL_VRAM, size: num_io_pages);
207 if (r) {
208 DRM_ERROR("Failed initializing VRAM heap.\n");
209 return r;
210 }
211 r = qxl_ttm_init_mem_type(qdev, TTM_PL_PRIV,
212 size: qdev->surfaceram_size / PAGE_SIZE);
213 if (r) {
214 DRM_ERROR("Failed initializing Surfaces heap.\n");
215 return r;
216 }
217 DRM_INFO("qxl: %uM of VRAM memory size\n",
218 (unsigned int)qdev->vram_size / (1024 * 1024));
219 DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
220 ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
221 DRM_INFO("qxl: %uM of Surface memory size\n",
222 (unsigned int)qdev->surfaceram_size / (1024 * 1024));
223 return 0;
224}
225
226void qxl_ttm_fini(struct qxl_device *qdev)
227{
228 ttm_range_man_fini(bdev: &qdev->mman.bdev, TTM_PL_VRAM);
229 ttm_range_man_fini(bdev: &qdev->mman.bdev, TTM_PL_PRIV);
230 ttm_device_fini(bdev: &qdev->mman.bdev);
231 DRM_INFO("qxl: ttm finalized\n");
232}
233
234void qxl_ttm_debugfs_init(struct qxl_device *qdev)
235{
236#if defined(CONFIG_DEBUG_FS)
237 ttm_resource_manager_create_debugfs(man: ttm_manager_type(bdev: &qdev->mman.bdev,
238 TTM_PL_VRAM),
239 parent: qdev->ddev.primary->debugfs_root, name: "qxl_mem_mm");
240 ttm_resource_manager_create_debugfs(man: ttm_manager_type(bdev: &qdev->mman.bdev,
241 TTM_PL_PRIV),
242 parent: qdev->ddev.primary->debugfs_root, name: "qxl_surf_mm");
243#endif
244}
245

source code of linux/drivers/gpu/drm/qxl/qxl_ttm.c