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/pci.h>
27 #include <linux/uaccess.h>
28
29 #include "qxl_drv.h"
30 #include "qxl_object.h"
31
32 /*
33 * TODO: allocating a new gem(in qxl_bo) for each request.
34 * This is wasteful since bo's are page aligned.
35 */
qxl_alloc_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)36 static int qxl_alloc_ioctl(struct drm_device *dev, void *data,
37 struct drm_file *file_priv)
38 {
39 struct qxl_device *qdev = to_qxl(dev);
40 struct drm_qxl_alloc *qxl_alloc = data;
41 int ret;
42 uint32_t handle;
43 u32 domain = QXL_GEM_DOMAIN_VRAM;
44
45 if (qxl_alloc->size == 0) {
46 DRM_ERROR("invalid size %d\n", qxl_alloc->size);
47 return -EINVAL;
48 }
49 ret = qxl_gem_object_create_with_handle(qdev, file_priv,
50 domain,
51 qxl_alloc->size,
52 NULL,
53 NULL, &handle);
54 if (ret) {
55 DRM_ERROR("%s: failed to create gem ret=%d\n",
56 __func__, ret);
57 return -ENOMEM;
58 }
59 qxl_alloc->handle = handle;
60 return 0;
61 }
62
qxl_map_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)63 static int qxl_map_ioctl(struct drm_device *dev, void *data,
64 struct drm_file *file_priv)
65 {
66 struct qxl_device *qdev = to_qxl(dev);
67 struct drm_qxl_map *qxl_map = data;
68
69 return drm_gem_ttm_dumb_map_offset(file_priv, &qdev->ddev, qxl_map->handle,
70 &qxl_map->offset);
71 }
72
73 struct qxl_reloc_info {
74 int type;
75 struct qxl_bo *dst_bo;
76 uint32_t dst_offset;
77 struct qxl_bo *src_bo;
78 int src_offset;
79 };
80
81 /*
82 * dst must be validated, i.e. whole bo on vram/surfacesram (right now all bo's
83 * are on vram).
84 * *(dst + dst_off) = qxl_bo_physical_address(src, src_off)
85 */
86 static void
apply_reloc(struct qxl_device * qdev,struct qxl_reloc_info * info)87 apply_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
88 {
89 void *reloc_page;
90
91 reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
92 *(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
93 info->src_bo,
94 info->src_offset);
95 qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
96 }
97
98 static void
apply_surf_reloc(struct qxl_device * qdev,struct qxl_reloc_info * info)99 apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
100 {
101 uint32_t id = 0;
102 void *reloc_page;
103
104 if (info->src_bo && !info->src_bo->is_primary)
105 id = info->src_bo->surface_id;
106
107 reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
108 *(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
109 qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
110 }
111
112 /* return holding the reference to this object */
qxlhw_handle_to_bo(struct drm_file * file_priv,uint64_t handle,struct qxl_release * release,struct qxl_bo ** qbo_p)113 static int qxlhw_handle_to_bo(struct drm_file *file_priv, uint64_t handle,
114 struct qxl_release *release, struct qxl_bo **qbo_p)
115 {
116 struct drm_gem_object *gobj;
117 struct qxl_bo *qobj;
118 int ret;
119
120 gobj = drm_gem_object_lookup(file_priv, handle);
121 if (!gobj)
122 return -EINVAL;
123
124 qobj = gem_to_qxl_bo(gobj);
125
126 ret = qxl_release_list_add(release, qobj);
127 drm_gem_object_put(gobj);
128 if (ret)
129 return ret;
130
131 *qbo_p = qobj;
132 return 0;
133 }
134
135 /*
136 * Usage of execbuffer:
137 * Relocations need to take into account the full QXLDrawable size.
138 * However, the command as passed from user space must *not* contain the initial
139 * QXLReleaseInfo struct (first XXX bytes)
140 */
qxl_process_single_command(struct qxl_device * qdev,struct drm_qxl_command * cmd,struct drm_file * file_priv)141 static int qxl_process_single_command(struct qxl_device *qdev,
142 struct drm_qxl_command *cmd,
143 struct drm_file *file_priv)
144 {
145 struct qxl_reloc_info *reloc_info;
146 int release_type;
147 struct qxl_release *release;
148 struct qxl_bo *cmd_bo;
149 void *fb_cmd;
150 int i, ret, num_relocs;
151 int unwritten;
152
153 switch (cmd->type) {
154 case QXL_CMD_DRAW:
155 release_type = QXL_RELEASE_DRAWABLE;
156 break;
157 case QXL_CMD_SURFACE:
158 case QXL_CMD_CURSOR:
159 default:
160 DRM_DEBUG("Only draw commands in execbuffers\n");
161 return -EINVAL;
162 }
163
164 if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
165 return -EINVAL;
166
167 if (!access_ok(u64_to_user_ptr(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_MASK));
187 unwritten = __copy_from_user_inatomic_nocache
188 (fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK),
189 u64_to_user_ptr(cmd->command), cmd->command_size);
190
191 {
192 struct qxl_drawable *draw = fb_cmd;
193
194 draw->mm_time = qdev->rom->mm_clock;
195 }
196
197 qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
198 if (unwritten) {
199 DRM_ERROR("got unwritten %d\n", unwritten);
200 ret = -EFAULT;
201 goto out_free_release;
202 }
203
204 /* fill out reloc info structs */
205 num_relocs = 0;
206 for (i = 0; i < cmd->relocs_num; ++i) {
207 struct drm_qxl_reloc reloc;
208 struct drm_qxl_reloc __user *u = u64_to_user_ptr(cmd->relocs);
209
210 if (copy_from_user(&reloc, u + i, sizeof(reloc))) {
211 ret = -EFAULT;
212 goto out_free_bos;
213 }
214
215 /* add the bos to the list of bos to validate -
216 need to validate first then process relocs? */
217 if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) {
218 DRM_DEBUG("unknown reloc type %d\n", reloc.reloc_type);
219
220 ret = -EINVAL;
221 goto out_free_bos;
222 }
223 reloc_info[i].type = reloc.reloc_type;
224
225 if (reloc.dst_handle) {
226 ret = qxlhw_handle_to_bo(file_priv, reloc.dst_handle, release,
227 &reloc_info[i].dst_bo);
228 if (ret)
229 goto out_free_bos;
230 reloc_info[i].dst_offset = reloc.dst_offset;
231 } else {
232 reloc_info[i].dst_bo = cmd_bo;
233 reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset;
234 }
235 num_relocs++;
236
237 /* reserve and validate the reloc dst bo */
238 if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle) {
239 ret = qxlhw_handle_to_bo(file_priv, reloc.src_handle, release,
240 &reloc_info[i].src_bo);
241 if (ret)
242 goto out_free_bos;
243 reloc_info[i].src_offset = reloc.src_offset;
244 } else {
245 reloc_info[i].src_bo = NULL;
246 reloc_info[i].src_offset = 0;
247 }
248 }
249
250 /* validate all buffers */
251 ret = qxl_release_reserve_list(release, false);
252 if (ret)
253 goto out_free_bos;
254
255 for (i = 0; i < cmd->relocs_num; ++i) {
256 if (reloc_info[i].type == QXL_RELOC_TYPE_BO)
257 apply_reloc(qdev, &reloc_info[i]);
258 else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
259 apply_surf_reloc(qdev, &reloc_info[i]);
260 }
261
262 qxl_release_fence_buffer_objects(release);
263 ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
264
265 out_free_bos:
266 out_free_release:
267 if (ret)
268 qxl_release_free(qdev, release);
269 out_free_reloc:
270 kfree(reloc_info);
271 return ret;
272 }
273
qxl_execbuffer_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)274 static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
275 struct drm_file *file_priv)
276 {
277 struct qxl_device *qdev = to_qxl(dev);
278 struct drm_qxl_execbuffer *execbuffer = data;
279 struct drm_qxl_command user_cmd;
280 int cmd_num;
281 int ret;
282
283 for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
284
285 struct drm_qxl_command __user *commands =
286 u64_to_user_ptr(execbuffer->commands);
287
288 if (copy_from_user(&user_cmd, commands + cmd_num,
289 sizeof(user_cmd)))
290 return -EFAULT;
291
292 ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
293 if (ret)
294 return ret;
295 }
296 return 0;
297 }
298
qxl_update_area_ioctl(struct drm_device * dev,void * data,struct drm_file * file)299 static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
300 struct drm_file *file)
301 {
302 struct qxl_device *qdev = to_qxl(dev);
303 struct drm_qxl_update_area *update_area = data;
304 struct qxl_rect area = {.left = update_area->left,
305 .top = update_area->top,
306 .right = update_area->right,
307 .bottom = update_area->bottom};
308 int ret;
309 struct drm_gem_object *gobj = NULL;
310 struct qxl_bo *qobj = NULL;
311 struct ttm_operation_ctx ctx = { true, false };
312
313 if (update_area->left >= update_area->right ||
314 update_area->top >= update_area->bottom)
315 return -EINVAL;
316
317 gobj = drm_gem_object_lookup(file, update_area->handle);
318 if (gobj == NULL)
319 return -ENOENT;
320
321 qobj = gem_to_qxl_bo(gobj);
322
323 ret = qxl_bo_reserve(qobj);
324 if (ret)
325 goto out;
326
327 if (!qobj->tbo.pin_count) {
328 qxl_ttm_placement_from_domain(qobj, qobj->type);
329 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
330 if (unlikely(ret))
331 goto out;
332 }
333
334 ret = qxl_bo_check_id(qdev, qobj);
335 if (ret)
336 goto out2;
337 if (!qobj->surface_id)
338 DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
339 ret = qxl_io_update_area(qdev, qobj, &area);
340
341 out2:
342 qxl_bo_unreserve(qobj);
343
344 out:
345 drm_gem_object_put(gobj);
346 return ret;
347 }
348
qxl_getparam_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)349 static int qxl_getparam_ioctl(struct drm_device *dev, void *data,
350 struct drm_file *file_priv)
351 {
352 struct qxl_device *qdev = to_qxl(dev);
353 struct drm_qxl_getparam *param = data;
354
355 switch (param->param) {
356 case QXL_PARAM_NUM_SURFACES:
357 param->value = qdev->rom->n_surfaces;
358 break;
359 case QXL_PARAM_MAX_RELOCS:
360 param->value = QXL_MAX_RES;
361 break;
362 default:
363 return -EINVAL;
364 }
365 return 0;
366 }
367
qxl_clientcap_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)368 static int qxl_clientcap_ioctl(struct drm_device *dev, void *data,
369 struct drm_file *file_priv)
370 {
371 struct qxl_device *qdev = to_qxl(dev);
372 struct pci_dev *pdev = to_pci_dev(dev->dev);
373 struct drm_qxl_clientcap *param = data;
374 int byte, idx;
375
376 byte = param->index / 8;
377 idx = param->index % 8;
378
379 if (pdev->revision < 4)
380 return -ENOSYS;
381
382 if (byte >= 58)
383 return -ENOSYS;
384
385 if (qdev->rom->client_capabilities[byte] & (1 << idx))
386 return 0;
387 return -ENOSYS;
388 }
389
qxl_alloc_surf_ioctl(struct drm_device * dev,void * data,struct drm_file * file)390 static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data,
391 struct drm_file *file)
392 {
393 struct qxl_device *qdev = to_qxl(dev);
394 struct drm_qxl_alloc_surf *param = data;
395 int handle;
396 int ret;
397 int size, actual_stride;
398 struct qxl_surface surf;
399
400 /* work out size allocate bo with handle */
401 actual_stride = param->stride < 0 ? -param->stride : param->stride;
402 size = actual_stride * param->height + actual_stride;
403
404 surf.format = param->format;
405 surf.width = param->width;
406 surf.height = param->height;
407 surf.stride = param->stride;
408 surf.data = 0;
409
410 ret = qxl_gem_object_create_with_handle(qdev, file,
411 QXL_GEM_DOMAIN_SURFACE,
412 size,
413 &surf,
414 NULL, &handle);
415 if (ret) {
416 DRM_ERROR("%s: failed to create gem ret=%d\n",
417 __func__, ret);
418 return -ENOMEM;
419 } else
420 param->handle = handle;
421 return ret;
422 }
423
424 const struct drm_ioctl_desc qxl_ioctls[] = {
425 DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH),
426
427 DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH),
428
429 DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl,
430 DRM_AUTH),
431 DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl,
432 DRM_AUTH),
433 DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl,
434 DRM_AUTH),
435 DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl,
436 DRM_AUTH),
437
438 DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl,
439 DRM_AUTH),
440 };
441
442 int qxl_max_ioctls = ARRAY_SIZE(qxl_ioctls);
443