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(objp: 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, caching: ttm_cached, extra_pages: 0)) {
116 kfree(objp: 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, surf: qbo, freeing: 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(bdev: &qdev->mman.bdev, type, use_tt: false, p_size: 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(bdev: &qdev->mman.bdev, funcs: &qxl_bo_driver, NULL,
198 mapping: qdev->ddev.anon_inode->i_mapping,
199 vma_manager: qdev->ddev.vma_offset_manager,
200 alloc_flags: 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, size: 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 size: 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(bdev: &qdev->mman.bdev, TTM_PL_VRAM);
230 ttm_range_man_fini(bdev: &qdev->mman.bdev, TTM_PL_PRIV);
231 ttm_device_fini(bdev: &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(man: ttm_manager_type(bdev: &qdev->mman.bdev,
239 TTM_PL_VRAM),
240 parent: qdev->ddev.primary->debugfs_root, name: "qxl_mem_mm");
241 ttm_resource_manager_create_debugfs(man: ttm_manager_type(bdev: &qdev->mman.bdev,
242 TTM_PL_PRIV),
243 parent: qdev->ddev.primary->debugfs_root, name: "qxl_surf_mm");
244#endif
245}
246

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