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 	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 
qxl_map_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)63 int 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 
72 struct 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  */
85 static void
apply_reloc(struct qxl_device * qdev,struct qxl_reloc_info * info)86 apply_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 
97 static void
apply_surf_reloc(struct qxl_device * qdev,struct qxl_reloc_info * info)98 apply_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 */
qxlhw_handle_to_bo(struct drm_file * file_priv,uint64_t handle,struct qxl_release * release,struct qxl_bo ** qbo_p)112 static 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  */
qxl_process_single_command(struct qxl_device * qdev,struct drm_qxl_command * cmd,struct drm_file * file_priv)140 static 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 
264 out_free_bos:
265 out_free_release:
266 	if (ret)
267 		qxl_release_free(qdev, release);
268 out_free_reloc:
269 	kfree(reloc_info);
270 	return ret;
271 }
272 
qxl_execbuffer_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)273 int 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 
qxl_update_area_ioctl(struct drm_device * dev,void * data,struct drm_file * file)297 int 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 
338 out2:
339 	qxl_bo_unreserve(qobj);
340 
341 out:
342 	drm_gem_object_put(gobj);
343 	return ret;
344 }
345 
qxl_getparam_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)346 int 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 
qxl_clientcap_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)364 int 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 
qxl_alloc_surf_ioctl(struct drm_device * dev,void * data,struct drm_file * file)385 int 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 }
418