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