qxl_ioctl.c

  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						qxl_alloc->size,
 53						NULL,
 54						NULL, &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_priv, &qdev->ddev, qxl_map->handle,
 70					   &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, info->dst_bo, info->dst_offset & PAGE_MASK);
 92	*(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
 93											      info->src_bo,
 94											      info->src_offset);
 95	qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, 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, info->dst_bo, info->dst_offset & PAGE_MASK);
108	*(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
109	qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, 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(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, qobj);
127	drm_gem_object_put(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					 sizeof(union qxl_release_info) +
178					 cmd->command_size,
179					 release_type,
180					 &release,
181					 &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, cmd_bo, (release->release_offset & PAGE_MASK));
187	unwritten = copy_from_user_inatomic_nontemporal
188		(fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK),
189		 u64_to_user_ptr(cmd->command), 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, cmd_bo, 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(&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
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
263out_free_bos:
264out_free_release:
265	if (ret)
266		qxl_release_free(qdev, release);
267out_free_reloc:
268	kfree(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(&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
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(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
337out2:
338	qxl_bo_unreserve(qobj);
339
340out:
341	drm_gem_object_put(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,
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}