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 int qxl_alloc_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
37 {
38 struct qxl_device *qdev = to_qxl(dev);
39 struct drm_qxl_alloc *qxl_alloc = data;
40 int ret;
41 uint32_t handle;
42 u32 domain = QXL_GEM_DOMAIN_VRAM;
43
44 if (qxl_alloc->size == 0) {
45 DRM_ERROR("invalid size %d\n", qxl_alloc->size);
46 return -EINVAL;
47 }
48 ret = qxl_gem_object_create_with_handle(qdev, file_priv,
49 domain,
50 qxl_alloc->size,
51 NULL,
52 NULL, &handle);
53 if (ret) {
54 DRM_ERROR("%s: failed to create gem ret=%d\n",
55 __func__, ret);
56 return -ENOMEM;
57 }
58 qxl_alloc->handle = handle;
59 return 0;
60 }
61
qxl_map_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)62 int qxl_map_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
63 {
64 struct qxl_device *qdev = to_qxl(dev);
65 struct drm_qxl_map *qxl_map = data;
66
67 return drm_gem_ttm_dumb_map_offset(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
89 reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
90 *(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
91 info->src_bo,
92 info->src_offset);
93 qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
94 }
95
96 static void
apply_surf_reloc(struct qxl_device * qdev,struct qxl_reloc_info * info)97 apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
98 {
99 uint32_t id = 0;
100 void *reloc_page;
101
102 if (info->src_bo && !info->src_bo->is_primary)
103 id = info->src_bo->surface_id;
104
105 reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
106 *(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
107 qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
108 }
109
110 /* 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)111 static int qxlhw_handle_to_bo(struct drm_file *file_priv, uint64_t handle,
112 struct qxl_release *release, struct qxl_bo **qbo_p)
113 {
114 struct drm_gem_object *gobj;
115 struct qxl_bo *qobj;
116 int ret;
117
118 gobj = drm_gem_object_lookup(file_priv, handle);
119 if (!gobj)
120 return -EINVAL;
121
122 qobj = gem_to_qxl_bo(gobj);
123
124 ret = qxl_release_list_add(release, qobj);
125 drm_gem_object_put(gobj);
126 if (ret)
127 return ret;
128
129 *qbo_p = qobj;
130 return 0;
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, 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 }
161
162 if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
163 return -EINVAL;
164
165 if (!access_ok(u64_to_user_ptr(cmd->command),
166 cmd->command_size))
167 return -EFAULT;
168
169 reloc_info = kmalloc_array(cmd->relocs_num,
170 sizeof(struct qxl_reloc_info), GFP_KERNEL);
171 if (!reloc_info)
172 return -ENOMEM;
173
174 ret = qxl_alloc_release_reserved(qdev,
175 sizeof(union qxl_release_info) +
176 cmd->command_size,
177 release_type,
178 &release,
179 &cmd_bo);
180 if (ret)
181 goto out_free_reloc;
182
183 /* TODO copy slow path code from i915 */
184 fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_MASK));
185 unwritten = __copy_from_user_inatomic_nocache
186 (fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK),
187 u64_to_user_ptr(cmd->command), cmd->command_size);
188
189 {
190 struct qxl_drawable *draw = fb_cmd;
191
192 draw->mm_time = qdev->rom->mm_clock;
193 }
194
195 qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
196 if (unwritten) {
197 DRM_ERROR("got unwritten %d\n", unwritten);
198 ret = -EFAULT;
199 goto out_free_release;
200 }
201
202 /* fill out reloc info structs */
203 num_relocs = 0;
204 for (i = 0; i < cmd->relocs_num; ++i) {
205 struct drm_qxl_reloc reloc;
206 struct drm_qxl_reloc __user *u = u64_to_user_ptr(cmd->relocs);
207
208 if (copy_from_user(&reloc, u + i, 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.reloc_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 ret = qxlhw_handle_to_bo(file_priv, reloc.dst_handle, release,
225 &reloc_info[i].dst_bo);
226 if (ret)
227 goto out_free_bos;
228 reloc_info[i].dst_offset = reloc.dst_offset;
229 } else {
230 reloc_info[i].dst_bo = cmd_bo;
231 reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset;
232 }
233 num_relocs++;
234
235 /* reserve and validate the reloc dst bo */
236 if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle) {
237 ret = qxlhw_handle_to_bo(file_priv, reloc.src_handle, release,
238 &reloc_info[i].src_bo);
239 if (ret)
240 goto out_free_bos;
241 reloc_info[i].src_offset = reloc.src_offset;
242 } else {
243 reloc_info[i].src_bo = NULL;
244 reloc_info[i].src_offset = 0;
245 }
246 }
247
248 /* validate all buffers */
249 ret = qxl_release_reserve_list(release, false);
250 if (ret)
251 goto out_free_bos;
252
253 for (i = 0; i < cmd->relocs_num; ++i) {
254 if (reloc_info[i].type == QXL_RELOC_TYPE_BO)
255 apply_reloc(qdev, &reloc_info[i]);
256 else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
257 apply_surf_reloc(qdev, &reloc_info[i]);
258 }
259
260 qxl_release_fence_buffer_objects(release);
261 ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
262
263 out_free_bos:
264 out_free_release:
265 if (ret)
266 qxl_release_free(qdev, release);
267 out_free_reloc:
268 kfree(reloc_info);
269 return ret;
270 }
271
qxl_execbuffer_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)272 int qxl_execbuffer_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
273 {
274 struct qxl_device *qdev = to_qxl(dev);
275 struct drm_qxl_execbuffer *execbuffer = data;
276 struct drm_qxl_command user_cmd;
277 int cmd_num;
278 int ret;
279
280 for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
281
282 struct drm_qxl_command __user *commands =
283 u64_to_user_ptr(execbuffer->commands);
284
285 if (copy_from_user(&user_cmd, commands + cmd_num,
286 sizeof(user_cmd)))
287 return -EFAULT;
288
289 ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
290 if (ret)
291 return ret;
292 }
293 return 0;
294 }
295
qxl_update_area_ioctl(struct drm_device * dev,void * data,struct drm_file * file)296 int qxl_update_area_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
297 {
298 struct qxl_device *qdev = to_qxl(dev);
299 struct drm_qxl_update_area *update_area = data;
300 struct qxl_rect area = {.left = update_area->left,
301 .top = update_area->top,
302 .right = update_area->right,
303 .bottom = update_area->bottom};
304 int ret;
305 struct drm_gem_object *gobj = NULL;
306 struct qxl_bo *qobj = NULL;
307 struct ttm_operation_ctx ctx = { true, false };
308
309 if (update_area->left >= update_area->right ||
310 update_area->top >= update_area->bottom)
311 return -EINVAL;
312
313 gobj = drm_gem_object_lookup(file, update_area->handle);
314 if (gobj == NULL)
315 return -ENOENT;
316
317 qobj = gem_to_qxl_bo(gobj);
318
319 ret = qxl_bo_reserve(qobj);
320 if (ret)
321 goto out;
322
323 if (!qobj->tbo.pin_count) {
324 qxl_ttm_placement_from_domain(qobj, qobj->type);
325 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
326 if (unlikely(ret))
327 goto out;
328 }
329
330 ret = qxl_bo_check_id(qdev, qobj);
331 if (ret)
332 goto out2;
333 if (!qobj->surface_id)
334 DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
335 ret = qxl_io_update_area(qdev, qobj, &area);
336
337 out2:
338 qxl_bo_unreserve(qobj);
339
340 out:
341 drm_gem_object_put(gobj);
342 return ret;
343 }
344
qxl_getparam_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)345 int qxl_getparam_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
346 {
347 struct qxl_device *qdev = to_qxl(dev);
348 struct drm_qxl_getparam *param = data;
349
350 switch (param->param) {
351 case QXL_PARAM_NUM_SURFACES:
352 param->value = qdev->rom->n_surfaces;
353 break;
354 case QXL_PARAM_MAX_RELOCS:
355 param->value = QXL_MAX_RES;
356 break;
357 default:
358 return -EINVAL;
359 }
360 return 0;
361 }
362
qxl_clientcap_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)363 int qxl_clientcap_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
364 {
365 struct qxl_device *qdev = to_qxl(dev);
366 struct pci_dev *pdev = to_pci_dev(dev->dev);
367 struct drm_qxl_clientcap *param = data;
368 int byte, idx;
369
370 byte = param->index / 8;
371 idx = param->index % 8;
372
373 if (pdev->revision < 4)
374 return -ENOSYS;
375
376 if (byte >= 58)
377 return -ENOSYS;
378
379 if (qdev->rom->client_capabilities[byte] & (1 << idx))
380 return 0;
381 return -ENOSYS;
382 }
383
qxl_alloc_surf_ioctl(struct drm_device * dev,void * data,struct drm_file * file)384 int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
385 {
386 struct qxl_device *qdev = to_qxl(dev);
387 struct drm_qxl_alloc_surf *param = data;
388 int handle;
389 int ret;
390 int size, actual_stride;
391 struct qxl_surface surf;
392
393 /* work out size allocate bo with handle */
394 actual_stride = param->stride < 0 ? -param->stride : param->stride;
395 size = actual_stride * param->height + actual_stride;
396
397 surf.format = param->format;
398 surf.width = param->width;
399 surf.height = param->height;
400 surf.stride = param->stride;
401 surf.data = 0;
402
403 ret = qxl_gem_object_create_with_handle(qdev, file,
404 QXL_GEM_DOMAIN_SURFACE,
405 size,
406 &surf,
407 NULL, &handle);
408 if (ret) {
409 DRM_ERROR("%s: failed to create gem ret=%d\n",
410 __func__, ret);
411 return -ENOMEM;
412 } else
413 param->handle = handle;
414 return ret;
415 }
416
