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 <drm/drm_print.h>
30
31#include "qxl_drv.h"
32#include "qxl_object.h"
33
34/*
35 * TODO: allocating a new gem(in qxl_bo) for each request.
36 * This is wasteful since bo's are page aligned.
37 */
38int qxl_alloc_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
39{
40 struct qxl_device *qdev = to_qxl(dev);
41 struct drm_qxl_alloc *qxl_alloc = data;
42 int ret;
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 size: qxl_alloc->size,
53 NULL,
54 NULL, handle: &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
64int qxl_map_ioctl(struct drm_device *dev, void *data, 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: file_priv, dev: &qdev->ddev, handle: qxl_map->handle,
70 offset: &qxl_map->offset);
71}
72
73struct 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 */
86static void
87apply_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, bo: info->dst_bo, page_offset: info->dst_offset & PAGE_MASK);
92 *(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
93 bo: info->src_bo,
94 offset: info->src_offset);
95 qxl_bo_kunmap_atomic_page(qdev, bo: info->dst_bo, map: reloc_page);
96}
97
98static void
99apply_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, bo: info->dst_bo, page_offset: info->dst_offset & PAGE_MASK);
108 *(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
109 qxl_bo_kunmap_atomic_page(qdev, bo: info->dst_bo, map: reloc_page);
110}
111
112/* return holding the reference to this object */
113static 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(filp: 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, bo: qobj);
127 drm_gem_object_put(obj: 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 */
141static 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;
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 size: sizeof(union qxl_release_info) +
178 cmd->command_size,
179 type: release_type,
180 release: &release,
181 rbo: &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, bo: cmd_bo, page_offset: (release->release_offset & PAGE_MASK));
187 unwritten = __copy_from_user_inatomic_nocache
188 (dst: fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK),
189 u64_to_user_ptr(cmd->command), size: 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, bo: cmd_bo, map: 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 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(to: &reloc, from: u + i, n: 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, handle: reloc.dst_handle, release,
226 qbo_p: &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
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, handle: reloc.src_handle, release,
238 qbo_p: &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, no_intr: 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, info: &reloc_info[i]);
256 else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
257 apply_surf_reloc(qdev, info: &reloc_info[i]);
258 }
259
260 qxl_release_fence_buffer_objects(release);
261 ret = qxl_push_command_ring_release(qdev, release, type: cmd->type, interruptible: true);
262
263out_free_bos:
264out_free_release:
265 if (ret)
266 qxl_release_free(qdev, release);
267out_free_reloc:
268 kfree(objp: reloc_info);
269 return ret;
270}
271
272int 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(to: &user_cmd, from: commands + cmd_num,
286 n: sizeof(user_cmd)))
287 return -EFAULT;
288
289 ret = qxl_process_single_command(qdev, cmd: &user_cmd, file_priv);
290 if (ret)
291 return ret;
292 }
293 return 0;
294}
295
296int 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(filp: file, handle: update_area->handle);
314 if (gobj == NULL)
315 return -ENOENT;
316
317 qobj = gem_to_qxl_bo(gobj);
318
319 ret = qxl_bo_reserve(bo: qobj);
320 if (ret)
321 goto out;
322
323 if (!qobj->tbo.pin_count) {
324 qxl_ttm_placement_from_domain(qbo: qobj, domain: qobj->type);
325 ret = ttm_bo_validate(bo: &qobj->tbo, placement: &qobj->placement, ctx: &ctx);
326 if (unlikely(ret))
327 goto out;
328 }
329
330 ret = qxl_bo_check_id(qdev, bo: 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, surf: qobj, area: &area);
336
337out2:
338 qxl_bo_unreserve(bo: qobj);
339
340out:
341 drm_gem_object_put(obj: gobj);
342 return ret;
343}
344
345int 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
363int 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
384int 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_priv: file,
404 QXL_GEM_DOMAIN_SURFACE,
405 size,
406 surf: &surf,
407 NULL, handle: &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

source code of linux/drivers/gpu/drm/qxl/qxl_ioctl.c