1 /* $NetBSD: qxl_ttm.c,v 1.3 2021/12/18 23:45:42 riastradh Exp $ */
2
3 /*
4 * Copyright 2013 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Dave Airlie
25 * Alon Levy
26 */
27
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: qxl_ttm.c,v 1.3 2021/12/18 23:45:42 riastradh Exp $");
30
31 #include <linux/delay.h>
32
33 #include <drm/drm.h>
34 #include <drm/drm_file.h>
35 #include <drm/drm_debugfs.h>
36 #include <drm/qxl_drm.h>
37 #include <drm/ttm/ttm_bo_api.h>
38 #include <drm/ttm/ttm_bo_driver.h>
39 #include <drm/ttm/ttm_module.h>
40 #include <drm/ttm/ttm_page_alloc.h>
41 #include <drm/ttm/ttm_placement.h>
42
43 #include "qxl_drv.h"
44 #include "qxl_object.h"
45
qxl_get_qdev(struct ttm_bo_device * bdev)46 static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev)
47 {
48 struct qxl_mman *mman;
49 struct qxl_device *qdev;
50
51 mman = container_of(bdev, struct qxl_mman, bdev);
52 qdev = container_of(mman, struct qxl_device, mman);
53 return qdev;
54 }
55
qxl_invalidate_caches(struct ttm_bo_device * bdev,uint32_t flags)56 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
57 {
58 return 0;
59 }
60
qxl_init_mem_type(struct ttm_bo_device * bdev,uint32_t type,struct ttm_mem_type_manager * man)61 static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
62 struct ttm_mem_type_manager *man)
63 {
64 struct qxl_device *qdev = qxl_get_qdev(bdev);
65 unsigned int gpu_offset_shift =
66 64 - (qdev->rom->slot_gen_bits + qdev->rom->slot_id_bits + 8);
67 struct qxl_memslot *slot;
68
69 switch (type) {
70 case TTM_PL_SYSTEM:
71 /* System memory */
72 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
73 man->available_caching = TTM_PL_MASK_CACHING;
74 man->default_caching = TTM_PL_FLAG_CACHED;
75 break;
76 case TTM_PL_VRAM:
77 case TTM_PL_PRIV:
78 /* "On-card" video ram */
79 slot = (type == TTM_PL_VRAM) ?
80 &qdev->main_slot : &qdev->surfaces_slot;
81 slot->gpu_offset = (uint64_t)type << gpu_offset_shift;
82 man->func = &ttm_bo_manager_func;
83 man->gpu_offset = slot->gpu_offset;
84 man->flags = TTM_MEMTYPE_FLAG_FIXED |
85 TTM_MEMTYPE_FLAG_MAPPABLE;
86 man->available_caching = TTM_PL_MASK_CACHING;
87 man->default_caching = TTM_PL_FLAG_CACHED;
88 break;
89 default:
90 DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
91 return -EINVAL;
92 }
93 return 0;
94 }
95
qxl_evict_flags(struct ttm_buffer_object * bo,struct ttm_placement * placement)96 static void qxl_evict_flags(struct ttm_buffer_object *bo,
97 struct ttm_placement *placement)
98 {
99 struct qxl_bo *qbo;
100 static const struct ttm_place placements = {
101 .fpfn = 0,
102 .lpfn = 0,
103 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
104 };
105
106 if (!qxl_ttm_bo_is_qxl_bo(bo)) {
107 placement->placement = &placements;
108 placement->busy_placement = &placements;
109 placement->num_placement = 1;
110 placement->num_busy_placement = 1;
111 return;
112 }
113 qbo = to_qxl_bo(bo);
114 qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false);
115 *placement = qbo->placement;
116 }
117
qxl_ttm_io_mem_reserve(struct ttm_bo_device * bdev,struct ttm_mem_reg * mem)118 int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
119 struct ttm_mem_reg *mem)
120 {
121 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
122 struct qxl_device *qdev = qxl_get_qdev(bdev);
123
124 mem->bus.addr = NULL;
125 mem->bus.offset = 0;
126 mem->bus.size = mem->num_pages << PAGE_SHIFT;
127 mem->bus.base = 0;
128 mem->bus.is_iomem = false;
129 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
130 return -EINVAL;
131 switch (mem->mem_type) {
132 case TTM_PL_SYSTEM:
133 /* system memory */
134 return 0;
135 case TTM_PL_VRAM:
136 mem->bus.is_iomem = true;
137 mem->bus.base = qdev->vram_base;
138 mem->bus.offset = mem->start << PAGE_SHIFT;
139 break;
140 case TTM_PL_PRIV:
141 mem->bus.is_iomem = true;
142 mem->bus.base = qdev->surfaceram_base;
143 mem->bus.offset = mem->start << PAGE_SHIFT;
144 break;
145 default:
146 return -EINVAL;
147 }
148 return 0;
149 }
150
qxl_ttm_io_mem_free(struct ttm_bo_device * bdev,struct ttm_mem_reg * mem)151 static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev,
152 struct ttm_mem_reg *mem)
153 {
154 }
155
156 /*
157 * TTM backend functions.
158 */
159 struct qxl_ttm_tt {
160 struct ttm_tt ttm;
161 struct qxl_device *qdev;
162 u64 offset;
163 };
164
qxl_ttm_backend_bind(struct ttm_tt * ttm,struct ttm_mem_reg * bo_mem)165 static int qxl_ttm_backend_bind(struct ttm_tt *ttm,
166 struct ttm_mem_reg *bo_mem)
167 {
168 struct qxl_ttm_tt *gtt = (void *)ttm;
169
170 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
171 if (!ttm->num_pages) {
172 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
173 ttm->num_pages, bo_mem, ttm);
174 }
175 /* Not implemented */
176 return -1;
177 }
178
qxl_ttm_backend_unbind(struct ttm_tt * ttm)179 static int qxl_ttm_backend_unbind(struct ttm_tt *ttm)
180 {
181 /* Not implemented */
182 return -1;
183 }
184
qxl_ttm_backend_destroy(struct ttm_tt * ttm)185 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm)
186 {
187 struct qxl_ttm_tt *gtt = (void *)ttm;
188
189 ttm_tt_fini(>t->ttm);
190 kfree(gtt);
191 }
192
193 static struct ttm_backend_func qxl_backend_func = {
194 .bind = &qxl_ttm_backend_bind,
195 .unbind = &qxl_ttm_backend_unbind,
196 .destroy = &qxl_ttm_backend_destroy,
197 };
198
qxl_ttm_tt_create(struct ttm_buffer_object * bo,uint32_t page_flags)199 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
200 uint32_t page_flags)
201 {
202 struct qxl_device *qdev;
203 struct qxl_ttm_tt *gtt;
204
205 qdev = qxl_get_qdev(bo->bdev);
206 gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL);
207 if (gtt == NULL)
208 return NULL;
209 gtt->ttm.func = &qxl_backend_func;
210 gtt->qdev = qdev;
211 if (ttm_tt_init(>t->ttm, bo, page_flags)) {
212 kfree(gtt);
213 return NULL;
214 }
215 return >t->ttm;
216 }
217
qxl_move_null(struct ttm_buffer_object * bo,struct ttm_mem_reg * new_mem)218 static void qxl_move_null(struct ttm_buffer_object *bo,
219 struct ttm_mem_reg *new_mem)
220 {
221 struct ttm_mem_reg *old_mem = &bo->mem;
222
223 BUG_ON(old_mem->mm_node != NULL);
224 *old_mem = *new_mem;
225 new_mem->mm_node = NULL;
226 }
227
qxl_bo_move(struct ttm_buffer_object * bo,bool evict,struct ttm_operation_ctx * ctx,struct ttm_mem_reg * new_mem)228 static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
229 struct ttm_operation_ctx *ctx,
230 struct ttm_mem_reg *new_mem)
231 {
232 struct ttm_mem_reg *old_mem = &bo->mem;
233 int ret;
234
235 ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
236 if (ret)
237 return ret;
238
239 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
240 qxl_move_null(bo, new_mem);
241 return 0;
242 }
243 return ttm_bo_move_memcpy(bo, ctx, new_mem);
244 }
245
qxl_bo_move_notify(struct ttm_buffer_object * bo,bool evict,struct ttm_mem_reg * new_mem)246 static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
247 bool evict,
248 struct ttm_mem_reg *new_mem)
249 {
250 struct qxl_bo *qbo;
251 struct qxl_device *qdev;
252
253 if (!qxl_ttm_bo_is_qxl_bo(bo))
254 return;
255 qbo = to_qxl_bo(bo);
256 qdev = qbo->tbo.base.dev->dev_private;
257
258 if (bo->mem.mem_type == TTM_PL_PRIV && qbo->surface_id)
259 qxl_surface_evict(qdev, qbo, new_mem ? true : false);
260 }
261
262 static struct ttm_bo_driver qxl_bo_driver = {
263 .ttm_tt_create = &qxl_ttm_tt_create,
264 .invalidate_caches = &qxl_invalidate_caches,
265 .init_mem_type = &qxl_init_mem_type,
266 .eviction_valuable = ttm_bo_eviction_valuable,
267 .evict_flags = &qxl_evict_flags,
268 .move = &qxl_bo_move,
269 .io_mem_reserve = &qxl_ttm_io_mem_reserve,
270 .io_mem_free = &qxl_ttm_io_mem_free,
271 .move_notify = &qxl_bo_move_notify,
272 };
273
qxl_ttm_init(struct qxl_device * qdev)274 int qxl_ttm_init(struct qxl_device *qdev)
275 {
276 int r;
277 int num_io_pages; /* != rom->num_io_pages, we include surface0 */
278
279 /* No others user of address space so set it to 0 */
280 r = ttm_bo_device_init(&qdev->mman.bdev,
281 &qxl_bo_driver,
282 qdev->ddev.anon_inode->i_mapping,
283 qdev->ddev.vma_offset_manager,
284 false);
285 if (r) {
286 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
287 return r;
288 }
289 /* NOTE: this includes the framebuffer (aka surface 0) */
290 num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
291 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM,
292 num_io_pages);
293 if (r) {
294 DRM_ERROR("Failed initializing VRAM heap.\n");
295 return r;
296 }
297 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV,
298 qdev->surfaceram_size / PAGE_SIZE);
299 if (r) {
300 DRM_ERROR("Failed initializing Surfaces heap.\n");
301 return r;
302 }
303 DRM_INFO("qxl: %uM of VRAM memory size\n",
304 (unsigned int)qdev->vram_size / (1024 * 1024));
305 DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
306 ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
307 DRM_INFO("qxl: %uM of Surface memory size\n",
308 (unsigned int)qdev->surfaceram_size / (1024 * 1024));
309 return 0;
310 }
311
qxl_ttm_fini(struct qxl_device * qdev)312 void qxl_ttm_fini(struct qxl_device *qdev)
313 {
314 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM);
315 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV);
316 ttm_bo_device_release(&qdev->mman.bdev);
317 DRM_INFO("qxl: ttm finalized\n");
318 }
319
320 #define QXL_DEBUGFS_MEM_TYPES 2
321
322 #if defined(CONFIG_DEBUG_FS)
qxl_mm_dump_table(struct seq_file * m,void * data)323 static int qxl_mm_dump_table(struct seq_file *m, void *data)
324 {
325 struct drm_info_node *node = (struct drm_info_node *)m->private;
326 struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
327 struct drm_printer p = drm_seq_file_printer(m);
328
329 spin_lock(&ttm_bo_glob.lru_lock);
330 drm_mm_print(mm, &p);
331 spin_unlock(&ttm_bo_glob.lru_lock);
332 return 0;
333 }
334 #endif
335
qxl_ttm_debugfs_init(struct qxl_device * qdev)336 int qxl_ttm_debugfs_init(struct qxl_device *qdev)
337 {
338 #if defined(CONFIG_DEBUG_FS)
339 static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES];
340 static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32];
341 unsigned int i;
342
343 for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) {
344 if (i == 0)
345 sprintf(qxl_mem_types_names[i], "qxl_mem_mm");
346 else
347 sprintf(qxl_mem_types_names[i], "qxl_surf_mm");
348 qxl_mem_types_list[i].name = qxl_mem_types_names[i];
349 qxl_mem_types_list[i].show = &qxl_mm_dump_table;
350 qxl_mem_types_list[i].driver_features = 0;
351 if (i == 0)
352 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv;
353 else
354 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV].priv;
355
356 }
357 return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i);
358 #else
359 return 0;
360 #endif
361 }
362