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 "qxl_drv.h"
27 #include "qxl_object.h"
28
29 /*
30 * TODO: allocating a new gem(in qxl_bo) for each request.
31 * This is wasteful since bo's are page aligned.
32 */
qxl_alloc_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)33 static int qxl_alloc_ioctl(struct drm_device *dev, void *data,
34 struct drm_file *file_priv)
35 {
36 struct qxl_device *qdev = dev->dev_private;
37 struct drm_qxl_alloc *qxl_alloc = data;
38 int ret;
39 struct qxl_bo *qobj;
40 uint32_t handle;
41 u32 domain = QXL_GEM_DOMAIN_VRAM;
42
43 if (qxl_alloc->size == 0) {
44 DRM_ERROR("invalid size %d\n", qxl_alloc->size);
45 return -EINVAL;
46 }
47 ret = qxl_gem_object_create_with_handle(qdev, file_priv,
48 domain,
49 qxl_alloc->size,
50 NULL,
51 &qobj, &handle);
52 if (ret) {
53 DRM_ERROR("%s: failed to create gem ret=%d\n",
54 __func__, ret);
55 return -ENOMEM;
56 }
57 qxl_alloc->handle = handle;
58 return 0;
59 }
60
qxl_map_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)61 static int qxl_map_ioctl(struct drm_device *dev, void *data,
62 struct drm_file *file_priv)
63 {
64 struct qxl_device *qdev = dev->dev_private;
65 struct drm_qxl_map *qxl_map = data;
66
67 return qxl_mode_dumb_mmap(file_priv, qdev->ddev, qxl_map->handle,
68 &qxl_map->offset);
69 }
70
71 struct qxl_reloc_info {
72 int type;
73 struct qxl_bo *dst_bo;
74 uint32_t dst_offset;
75 struct qxl_bo *src_bo;
76 int src_offset;
77 };
78
79 /*
80 * dst must be validated, i.e. whole bo on vram/surfacesram (right now all bo's
81 * are on vram).
82 * *(dst + dst_off) = qxl_bo_physical_address(src, src_off)
83 */
84 static void
apply_reloc(struct qxl_device * qdev,struct qxl_reloc_info * info)85 apply_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
86 {
87 void *reloc_page;
88 reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
89 *(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
90 info->src_bo,
91 info->src_offset);
92 qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
93 }
94
95 static void
apply_surf_reloc(struct qxl_device * qdev,struct qxl_reloc_info * info)96 apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
97 {
98 uint32_t id = 0;
99 void *reloc_page;
100
101 if (info->src_bo && !info->src_bo->is_primary)
102 id = info->src_bo->surface_id;
103
104 reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
105 *(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
106 qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
107 }
108
109 /* return holding the reference to this object */
qxlhw_handle_to_bo(struct qxl_device * qdev,struct drm_file * file_priv,uint64_t handle,struct qxl_release * release)110 static struct qxl_bo *qxlhw_handle_to_bo(struct qxl_device *qdev,
111 struct drm_file *file_priv, uint64_t handle,
112 struct qxl_release *release)
113 {
114 struct drm_gem_object *gobj;
115 struct qxl_bo *qobj;
116 int ret;
117
118 gobj = drm_gem_object_lookup(qdev->ddev, file_priv, handle);
119 if (!gobj)
120 return NULL;
121
122 qobj = gem_to_qxl_bo(gobj);
123
124 ret = qxl_release_list_add(release, qobj);
125 if (ret) {
126 drm_gem_object_unreference_unlocked(gobj);
127 return NULL;
128 }
129
130 return qobj;
131 }
132
133 /*
134 * Usage of execbuffer:
135 * Relocations need to take into account the full QXLDrawable size.
136 * However, the command as passed from user space must *not* contain the initial
137 * QXLReleaseInfo struct (first XXX bytes)
138 */
qxl_process_single_command(struct qxl_device * qdev,struct drm_qxl_command * cmd,struct drm_file * file_priv)139 static int qxl_process_single_command(struct qxl_device *qdev,
140 struct drm_qxl_command *cmd,
141 struct drm_file *file_priv)
142 {
143 struct qxl_reloc_info *reloc_info;
144 int release_type;
145 struct qxl_release *release;
146 struct qxl_bo *cmd_bo;
147 void *fb_cmd;
148 int i, j, ret, num_relocs;
149 int unwritten;
150
151 switch (cmd->type) {
152 case QXL_CMD_DRAW:
153 release_type = QXL_RELEASE_DRAWABLE;
154 break;
155 case QXL_CMD_SURFACE:
156 case QXL_CMD_CURSOR:
157 default:
158 DRM_DEBUG("Only draw commands in execbuffers\n");
159 return -EINVAL;
160 break;
161 }
162
163 if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
164 return -EINVAL;
165
166 if (!access_ok(VERIFY_READ,
167 (void *)(unsigned long)cmd->command,
168 cmd->command_size))
169 return -EFAULT;
170
171 reloc_info = kmalloc_array(cmd->relocs_num,
172 sizeof(struct qxl_reloc_info), GFP_KERNEL);
173 if (!reloc_info)
174 return -ENOMEM;
175
176 ret = qxl_alloc_release_reserved(qdev,
177 sizeof(union qxl_release_info) +
178 cmd->command_size,
179 release_type,
180 &release,
181 &cmd_bo);
182 if (ret)
183 goto out_free_reloc;
184
185 /* TODO copy slow path code from i915 */
186 fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_SIZE));
187 unwritten = __copy_from_user_inatomic_nocache(fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_SIZE), (void *)(unsigned long)cmd->command, cmd->command_size);
188
189 {
190 struct qxl_drawable *draw = fb_cmd;
191 draw->mm_time = qdev->rom->mm_clock;
192 }
193
194 qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
195 if (unwritten) {
196 DRM_ERROR("got unwritten %d\n", unwritten);
197 ret = -EFAULT;
198 goto out_free_release;
199 }
200
201 /* fill out reloc info structs */
202 num_relocs = 0;
203 for (i = 0; i < cmd->relocs_num; ++i) {
204 struct drm_qxl_reloc reloc;
205
206 if (copy_from_user(&reloc,
207 &((struct drm_qxl_reloc *)(uintptr_t)cmd->relocs)[i],
208 sizeof(reloc))) {
209 ret = -EFAULT;
210 goto out_free_bos;
211 }
212
213 /* add the bos to the list of bos to validate -
214 need to validate first then process relocs? */
215 if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) {
216 DRM_DEBUG("unknown reloc type %d\n", reloc_info[i].type);
217
218 ret = -EINVAL;
219 goto out_free_bos;
220 }
221 reloc_info[i].type = reloc.reloc_type;
222
223 if (reloc.dst_handle) {
224 reloc_info[i].dst_bo = qxlhw_handle_to_bo(qdev, file_priv,
225 reloc.dst_handle, release);
226 if (!reloc_info[i].dst_bo) {
227 ret = -EINVAL;
228 reloc_info[i].src_bo = NULL;
229 goto out_free_bos;
230 }
231 reloc_info[i].dst_offset = reloc.dst_offset;
232 } else {
233 reloc_info[i].dst_bo = cmd_bo;
234 reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset;
235 }
236 num_relocs++;
237
238 /* reserve and validate the reloc dst bo */
239 if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle > 0) {
240 reloc_info[i].src_bo =
241 qxlhw_handle_to_bo(qdev, file_priv,
242 reloc.src_handle, release);
243 if (!reloc_info[i].src_bo) {
244 if (reloc_info[i].dst_bo != cmd_bo)
245 drm_gem_object_unreference_unlocked(&reloc_info[i].dst_bo->gem_base);
246 ret = -EINVAL;
247 goto out_free_bos;
248 }
249 reloc_info[i].src_offset = reloc.src_offset;
250 } else {
251 reloc_info[i].src_bo = NULL;
252 reloc_info[i].src_offset = 0;
253 }
254 }
255
256 /* validate all buffers */
257 ret = qxl_release_reserve_list(release, false);
258 if (ret)
259 goto out_free_bos;
260
261 for (i = 0; i < cmd->relocs_num; ++i) {
262 if (reloc_info[i].type == QXL_RELOC_TYPE_BO)
263 apply_reloc(qdev, &reloc_info[i]);
264 else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
265 apply_surf_reloc(qdev, &reloc_info[i]);
266 }
267
268 ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
269 if (ret)
270 qxl_release_backoff_reserve_list(release);
271 else
272 qxl_release_fence_buffer_objects(release);
273
274 out_free_bos:
275 for (j = 0; j < num_relocs; j++) {
276 if (reloc_info[j].dst_bo != cmd_bo)
277 drm_gem_object_unreference_unlocked(&reloc_info[j].dst_bo->gem_base);
278 if (reloc_info[j].src_bo && reloc_info[j].src_bo != cmd_bo)
279 drm_gem_object_unreference_unlocked(&reloc_info[j].src_bo->gem_base);
280 }
281 out_free_release:
282 if (ret)
283 qxl_release_free(qdev, release);
284 out_free_reloc:
285 kfree(reloc_info);
286 return ret;
287 }
288
qxl_execbuffer_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)289 static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
290 struct drm_file *file_priv)
291 {
292 struct qxl_device *qdev = dev->dev_private;
293 struct drm_qxl_execbuffer *execbuffer = data;
294 struct drm_qxl_command user_cmd;
295 int cmd_num;
296 int ret;
297
298 for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
299
300 struct drm_qxl_command *commands =
301 (struct drm_qxl_command *)(uintptr_t)execbuffer->commands;
302
303 if (copy_from_user(&user_cmd, &commands[cmd_num],
304 sizeof(user_cmd)))
305 return -EFAULT;
306
307 ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
308 if (ret)
309 return ret;
310 }
311 return 0;
312 }
313
qxl_update_area_ioctl(struct drm_device * dev,void * data,struct drm_file * file)314 static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
315 struct drm_file *file)
316 {
317 struct qxl_device *qdev = dev->dev_private;
318 struct drm_qxl_update_area *update_area = data;
319 struct qxl_rect area = {.left = update_area->left,
320 .top = update_area->top,
321 .right = update_area->right,
322 .bottom = update_area->bottom};
323 int ret;
324 struct drm_gem_object *gobj = NULL;
325 struct qxl_bo *qobj = NULL;
326
327 if (update_area->left >= update_area->right ||
328 update_area->top >= update_area->bottom)
329 return -EINVAL;
330
331 gobj = drm_gem_object_lookup(dev, file, update_area->handle);
332 if (gobj == NULL)
333 return -ENOENT;
334
335 qobj = gem_to_qxl_bo(gobj);
336
337 ret = qxl_bo_reserve(qobj, false);
338 if (ret)
339 goto out;
340
341 if (!qobj->pin_count) {
342 qxl_ttm_placement_from_domain(qobj, qobj->type, false);
343 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement,
344 true, false);
345 if (unlikely(ret))
346 goto out;
347 }
348
349 ret = qxl_bo_check_id(qdev, qobj);
350 if (ret)
351 goto out2;
352 if (!qobj->surface_id)
353 DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
354 ret = qxl_io_update_area(qdev, qobj, &area);
355
356 out2:
357 qxl_bo_unreserve(qobj);
358
359 out:
360 drm_gem_object_unreference_unlocked(gobj);
361 return ret;
362 }
363
qxl_getparam_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)364 static int qxl_getparam_ioctl(struct drm_device *dev, void *data,
365 struct drm_file *file_priv)
366 {
367 struct qxl_device *qdev = dev->dev_private;
368 struct drm_qxl_getparam *param = data;
369
370 switch (param->param) {
371 case QXL_PARAM_NUM_SURFACES:
372 param->value = qdev->rom->n_surfaces;
373 break;
374 case QXL_PARAM_MAX_RELOCS:
375 param->value = QXL_MAX_RES;
376 break;
377 default:
378 return -EINVAL;
379 }
380 return 0;
381 }
382
qxl_clientcap_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)383 static int qxl_clientcap_ioctl(struct drm_device *dev, void *data,
384 struct drm_file *file_priv)
385 {
386 struct qxl_device *qdev = dev->dev_private;
387 struct drm_qxl_clientcap *param = data;
388 int byte, idx;
389
390 byte = param->index / 8;
391 idx = param->index % 8;
392
393 if (qdev->pdev->revision < 4)
394 return -ENOSYS;
395
396 if (byte >= 58)
397 return -ENOSYS;
398
399 if (qdev->rom->client_capabilities[byte] & (1 << idx))
400 return 0;
401 return -ENOSYS;
402 }
403
qxl_alloc_surf_ioctl(struct drm_device * dev,void * data,struct drm_file * file)404 static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data,
405 struct drm_file *file)
406 {
407 struct qxl_device *qdev = dev->dev_private;
408 struct drm_qxl_alloc_surf *param = data;
409 struct qxl_bo *qobj;
410 int handle;
411 int ret;
412 int size, actual_stride;
413 struct qxl_surface surf;
414
415 /* work out size allocate bo with handle */
416 actual_stride = param->stride < 0 ? -param->stride : param->stride;
417 size = actual_stride * param->height + actual_stride;
418
419 surf.format = param->format;
420 surf.width = param->width;
421 surf.height = param->height;
422 surf.stride = param->stride;
423 surf.data = 0;
424
425 ret = qxl_gem_object_create_with_handle(qdev, file,
426 QXL_GEM_DOMAIN_SURFACE,
427 size,
428 &surf,
429 &qobj, &handle);
430 if (ret) {
431 DRM_ERROR("%s: failed to create gem ret=%d\n",
432 __func__, ret);
433 return -ENOMEM;
434 } else
435 param->handle = handle;
436 return ret;
437 }
438
439 const struct drm_ioctl_desc qxl_ioctls[] = {
440 DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH|DRM_UNLOCKED),
441
442 DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH|DRM_UNLOCKED),
443
444 DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl,
445 DRM_AUTH|DRM_UNLOCKED),
446 DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl,
447 DRM_AUTH|DRM_UNLOCKED),
448 DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl,
449 DRM_AUTH|DRM_UNLOCKED),
450 DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl,
451 DRM_AUTH|DRM_UNLOCKED),
452
453 DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl,
454 DRM_AUTH|DRM_UNLOCKED),
455 };
456
457 int qxl_max_ioctls = ARRAY_SIZE(qxl_ioctls);
458