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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 */
36static 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 struct qxl_bo *qobj;
43 uint32_t handle;
44 u32 domain = QXL_GEM_DOMAIN_VRAM;
45
46 if (qxl_alloc->size == 0) {
47 DRM_ERROR("invalid size %d\n", qxl_alloc->size);
48 return -EINVAL;
49 }
50 ret = qxl_gem_object_create_with_handle(qdev, file_priv,
51 domain,
52 qxl_alloc->size,
53 NULL,
54 &qobj, &handle);
55 if (ret) {
56 DRM_ERROR("%s: failed to create gem ret=%d\n",
57 __func__, ret);
58 return -ENOMEM;
59 }
60 qxl_alloc->handle = handle;
61 return 0;
62}
63
64static int qxl_map_ioctl(struct drm_device *dev, void *data,
65 struct drm_file *file_priv)
66{
67 struct qxl_device *qdev = to_qxl(dev);
68 struct drm_qxl_map *qxl_map = data;
69
70 return qxl_mode_dumb_mmap(file_priv, &qdev->ddev, qxl_map->handle,
71 &qxl_map->offset);
72}
73
74struct qxl_reloc_info {
75 int type;
76 struct qxl_bo *dst_bo;
77 uint32_t dst_offset;
78 struct qxl_bo *src_bo;
79 int src_offset;
80};
81
82/*
83 * dst must be validated, i.e. whole bo on vram/surfacesram (right now all bo's
84 * are on vram).
85 * *(dst + dst_off) = qxl_bo_physical_address(src, src_off)
86 */
87static void
88apply_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
89{
90 void *reloc_page;
91
92 reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
93 *(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
94 info->src_bo,
95 info->src_offset);
96 qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
97}
98
99static void
100apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
101{
102 uint32_t id = 0;
103 void *reloc_page;
104
105 if (info->src_bo && !info->src_bo->is_primary)
106 id = info->src_bo->surface_id;
107
108 reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
109 *(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
110 qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
111}
112
113/* return holding the reference to this object */
114static int qxlhw_handle_to_bo(struct drm_file *file_priv, uint64_t handle,
115 struct qxl_release *release, struct qxl_bo **qbo_p)
116{
117 struct drm_gem_object *gobj;
118 struct qxl_bo *qobj;
119 int ret;
120
121 gobj = drm_gem_object_lookup(file_priv, handle);
122 if (!gobj)
123 return -EINVAL;
124
125 qobj = gem_to_qxl_bo(gobj);
126
127 ret = qxl_release_list_add(release, qobj);
128 drm_gem_object_put(gobj);
129 if (ret)
130 return ret;
131
132 *qbo_p = qobj;
133 return 0;
134}
135
136/*
137 * Usage of execbuffer:
138 * Relocations need to take into account the full QXLDrawable size.
139 * However, the command as passed from user space must *not* contain the initial
140 * QXLReleaseInfo struct (first XXX bytes)
141 */
142static int qxl_process_single_command(struct qxl_device *qdev,
143 struct drm_qxl_command *cmd,
144 struct drm_file *file_priv)
145{
146 struct qxl_reloc_info *reloc_info;
147 int release_type;
148 struct qxl_release *release;
149 struct qxl_bo *cmd_bo;
150 void *fb_cmd;
151 int i, ret, num_relocs;
152 int unwritten;
153
154 switch (cmd->type) {
155 case QXL_CMD_DRAW:
156 release_type = QXL_RELEASE_DRAWABLE;
157 break;
158 case QXL_CMD_SURFACE:
159 case QXL_CMD_CURSOR:
160 default:
161 DRM_DEBUG("Only draw commands in execbuffers\n");
162 return -EINVAL;
163 break;
164 }
165
166 if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
167 return -EINVAL;
168
169 if (!access_ok(u64_to_user_ptr(cmd->command),
170 cmd->command_size))
171 return -EFAULT;
172
173 reloc_info = kmalloc_array(cmd->relocs_num,
174 sizeof(struct qxl_reloc_info), GFP_KERNEL);
175 if (!reloc_info)
176 return -ENOMEM;
177
178 ret = qxl_alloc_release_reserved(qdev,
179 sizeof(union qxl_release_info) +
180 cmd->command_size,
181 release_type,
182 &release,
183 &cmd_bo);
184 if (ret)
185 goto out_free_reloc;
186
187 /* TODO copy slow path code from i915 */
188 fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_MASK));
189 unwritten = __copy_from_user_inatomic_nocache
190 (fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK),
191 u64_to_user_ptr(cmd->command), cmd->command_size);
192
193 {
194 struct qxl_drawable *draw = fb_cmd;
195
196 draw->mm_time = qdev->rom->mm_clock;
197 }
198
199 qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
200 if (unwritten) {
201 DRM_ERROR("got unwritten %d\n", unwritten);
202 ret = -EFAULT;
203 goto out_free_release;
204 }
205
206 /* fill out reloc info structs */
207 num_relocs = 0;
208 for (i = 0; i < cmd->relocs_num; ++i) {
209 struct drm_qxl_reloc reloc;
210 struct drm_qxl_reloc __user *u = u64_to_user_ptr(cmd->relocs);
211
212 if (copy_from_user(&reloc, u + i, sizeof(reloc))) {
213 ret = -EFAULT;
214 goto out_free_bos;
215 }
216
217 /* add the bos to the list of bos to validate -
218 need to validate first then process relocs? */
219 if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) {
220 DRM_DEBUG("unknown reloc type %d\n", reloc.reloc_type);
221
222 ret = -EINVAL;
223 goto out_free_bos;
224 }
225 reloc_info[i].type = reloc.reloc_type;
226
227 if (reloc.dst_handle) {
228 ret = qxlhw_handle_to_bo(file_priv, reloc.dst_handle, release,
229 &reloc_info[i].dst_bo);
230 if (ret)
231 goto out_free_bos;
232 reloc_info[i].dst_offset = reloc.dst_offset;
233 } else {
234 reloc_info[i].dst_bo = cmd_bo;
235 reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset;
236 }
237 num_relocs++;
238
239 /* reserve and validate the reloc dst bo */
240 if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle) {
241 ret = qxlhw_handle_to_bo(file_priv, reloc.src_handle, release,
242 &reloc_info[i].src_bo);
243 if (ret)
244 goto out_free_bos;
245 reloc_info[i].src_offset = reloc.src_offset;
246 } else {
247 reloc_info[i].src_bo = NULL;
248 reloc_info[i].src_offset = 0;
249 }
250 }
251
252 /* validate all buffers */
253 ret = qxl_release_reserve_list(release, false);
254 if (ret)
255 goto out_free_bos;
256
257 for (i = 0; i < cmd->relocs_num; ++i) {
258 if (reloc_info[i].type == QXL_RELOC_TYPE_BO)
259 apply_reloc(qdev, &reloc_info[i]);
260 else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
261 apply_surf_reloc(qdev, &reloc_info[i]);
262 }
263
264 qxl_release_fence_buffer_objects(release);
265 ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
266
267out_free_bos:
268out_free_release:
269 if (ret)
270 qxl_release_free(qdev, release);
271out_free_reloc:
272 kfree(reloc_info);
273 return ret;
274}
275
276static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
277 struct drm_file *file_priv)
278{
279 struct qxl_device *qdev = to_qxl(dev);
280 struct drm_qxl_execbuffer *execbuffer = data;
281 struct drm_qxl_command user_cmd;
282 int cmd_num;
283 int ret;
284
285 for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
286
287 struct drm_qxl_command __user *commands =
288 u64_to_user_ptr(execbuffer->commands);
289
290 if (copy_from_user(&user_cmd, commands + cmd_num,
291 sizeof(user_cmd)))
292 return -EFAULT;
293
294 ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
295 if (ret)
296 return ret;
297 }
298 return 0;
299}
300
301static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
302 struct drm_file *file)
303{
304 struct qxl_device *qdev = to_qxl(dev);
305 struct drm_qxl_update_area *update_area = data;
306 struct qxl_rect area = {.left = update_area->left,
307 .top = update_area->top,
308 .right = update_area->right,
309 .bottom = update_area->bottom};
310 int ret;
311 struct drm_gem_object *gobj = NULL;
312 struct qxl_bo *qobj = NULL;
313 struct ttm_operation_ctx ctx = { true, false };
314
315 if (update_area->left >= update_area->right ||
316 update_area->top >= update_area->bottom)
317 return -EINVAL;
318
319 gobj = drm_gem_object_lookup(file, update_area->handle);
320 if (gobj == NULL)
321 return -ENOENT;
322
323 qobj = gem_to_qxl_bo(gobj);
324
325 ret = qxl_bo_reserve(qobj, false);
326 if (ret)
327 goto out;
328
329 if (!qobj->pin_count) {
330 qxl_ttm_placement_from_domain(qobj, qobj->type, false);
331 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
332 if (unlikely(ret))
333 goto out;
334 }
335
336 ret = qxl_bo_check_id(qdev, qobj);
337 if (ret)
338 goto out2;
339 if (!qobj->surface_id)
340 DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
341 ret = qxl_io_update_area(qdev, qobj, &area);
342
343out2:
344 qxl_bo_unreserve(qobj);
345
346out:
347 drm_gem_object_put(gobj);
348 return ret;
349}
350
351static int qxl_getparam_ioctl(struct drm_device *dev, void *data,
352 struct drm_file *file_priv)
353{
354 struct qxl_device *qdev = to_qxl(dev);
355 struct drm_qxl_getparam *param = data;
356
357 switch (param->param) {
358 case QXL_PARAM_NUM_SURFACES:
359 param->value = qdev->rom->n_surfaces;
360 break;
361 case QXL_PARAM_MAX_RELOCS:
362 param->value = QXL_MAX_RES;
363 break;
364 default:
365 return -EINVAL;
366 }
367 return 0;
368}
369
370static int qxl_clientcap_ioctl(struct drm_device *dev, void *data,
371 struct drm_file *file_priv)
372{
373 struct qxl_device *qdev = to_qxl(dev);
374 struct drm_qxl_clientcap *param = data;
375 int byte, idx;
376
377 byte = param->index / 8;
378 idx = param->index % 8;
379
380 if (dev->pdev->revision < 4)
381 return -ENOSYS;
382
383 if (byte >= 58)
384 return -ENOSYS;
385
386 if (qdev->rom->client_capabilities[byte] & (1 << idx))
387 return 0;
388 return -ENOSYS;
389}
390
391static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data,
392 struct drm_file *file)
393{
394 struct qxl_device *qdev = to_qxl(dev);
395 struct drm_qxl_alloc_surf *param = data;
396 struct qxl_bo *qobj;
397 int handle;
398 int ret;
399 int size, actual_stride;
400 struct qxl_surface surf;
401
402 /* work out size allocate bo with handle */
403 actual_stride = param->stride < 0 ? -param->stride : param->stride;
404 size = actual_stride * param->height + actual_stride;
405
406 surf.format = param->format;
407 surf.width = param->width;
408 surf.height = param->height;
409 surf.stride = param->stride;
410 surf.data = 0;
411
412 ret = qxl_gem_object_create_with_handle(qdev, file,
413 QXL_GEM_DOMAIN_SURFACE,
414 size,
415 &surf,
416 &qobj, &handle);
417 if (ret) {
418 DRM_ERROR("%s: failed to create gem ret=%d\n",
419 __func__, ret);
420 return -ENOMEM;
421 } else
422 param->handle = handle;
423 return ret;
424}
425
426const struct drm_ioctl_desc qxl_ioctls[] = {
427 DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH),
428
429 DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH),
430
431 DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl,
432 DRM_AUTH),
433 DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl,
434 DRM_AUTH),
435 DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl,
436 DRM_AUTH),
437 DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl,
438 DRM_AUTH),
439
440 DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl,
441 DRM_AUTH),
442};
443
444int qxl_max_ioctls = ARRAY_SIZE(qxl_ioctls);