/drivers/gpu/drm/radeon/radeon_cs.c

  1/*
  2 * Copyright 2008 Jerome Glisse.
  3 * All Rights Reserved.
  4 *
  5 * Permission is hereby granted, free of charge, to any person obtaining a
  6 * copy of this software and associated documentation files (the "Software"),
  7 * to deal in the Software without restriction, including without limitation
  8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  9 * and/or sell copies of the Software, and to permit persons to whom the
 10 * Software is furnished to do so, subject to the following conditions:
 11 *
 12 * The above copyright notice and this permission notice (including the next
 13 * paragraph) shall be included in all copies or substantial portions of the
 14 * Software.
 15 *
 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 19 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 22 * DEALINGS IN THE SOFTWARE.
 23 *
 24 * Authors:
 25 *    Jerome Glisse <glisse@freedesktop.org>
 26 */
 27#include "drmP.h"
 28#include "radeon_drm.h"
 29#include "radeon_reg.h"
 30#include "radeon.h"
 31
 32void r100_cs_dump_packet(struct radeon_cs_parser *p,
 33			 struct radeon_cs_packet *pkt);
 34
 35int radeon_cs_parser_relocs(struct radeon_cs_parser *p)
 36{
 37	struct drm_device *ddev = p->rdev->ddev;
 38	struct radeon_cs_chunk *chunk;
 39	unsigned i, j;
 40	bool duplicate;
 41
 42	if (p->chunk_relocs_idx == -1) {
 43		return 0;
 44	}
 45	chunk = &p->chunks[p->chunk_relocs_idx];
 46	/* FIXME: we assume that each relocs use 4 dwords */
 47	p->nrelocs = chunk->length_dw / 4;
 48	p->relocs_ptr = kcalloc(p->nrelocs, sizeof(void *), GFP_KERNEL);
 49	if (p->relocs_ptr == NULL) {
 50		return -ENOMEM;
 51	}
 52	p->relocs = kcalloc(p->nrelocs, sizeof(struct radeon_cs_reloc), GFP_KERNEL);
 53	if (p->relocs == NULL) {
 54		return -ENOMEM;
 55	}
 56	for (i = 0; i < p->nrelocs; i++) {
 57		struct drm_radeon_cs_reloc *r;
 58
 59		duplicate = false;
 60		r = (struct drm_radeon_cs_reloc *)&chunk->kdata[i*4];
 61		for (j = 0; j < p->nrelocs; j++) {
 62			if (r->handle == p->relocs[j].handle) {
 63				p->relocs_ptr[i] = &p->relocs[j];
 64				duplicate = true;
 65				break;
 66			}
 67		}
 68		if (!duplicate) {
 69			p->relocs[i].gobj = drm_gem_object_lookup(ddev,
 70								  p->filp,
 71								  r->handle);
 72			if (p->relocs[i].gobj == NULL) {
 73				DRM_ERROR("gem object lookup failed 0x%x\n",
 74					  r->handle);
 75				return -ENOENT;
 76			}
 77			p->relocs_ptr[i] = &p->relocs[i];
 78			p->relocs[i].robj = gem_to_radeon_bo(p->relocs[i].gobj);
 79			p->relocs[i].lobj.bo = p->relocs[i].robj;
 80			p->relocs[i].lobj.wdomain = r->write_domain;
 81			p->relocs[i].lobj.rdomain = r->read_domains;
 82			p->relocs[i].lobj.tv.bo = &p->relocs[i].robj->tbo;
 83			p->relocs[i].handle = r->handle;
 84			p->relocs[i].flags = r->flags;
 85			radeon_bo_list_add_object(&p->relocs[i].lobj,
 86						  &p->validated);
 87		}
 88	}
 89	return radeon_bo_list_validate(&p->validated);
 90}
 91
 92int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
 93{
 94	struct drm_radeon_cs *cs = data;
 95	uint64_t *chunk_array_ptr;
 96	unsigned size, i;
 97
 98	if (!cs->num_chunks) {
 99		return 0;
100	}
101	/* get chunks */
102	INIT_LIST_HEAD(&p->validated);
103	p->idx = 0;
104	p->chunk_ib_idx = -1;
105	p->chunk_relocs_idx = -1;
106	p->chunks_array = kcalloc(cs->num_chunks, sizeof(uint64_t), GFP_KERNEL);
107	if (p->chunks_array == NULL) {
108		return -ENOMEM;
109	}
110	chunk_array_ptr = (uint64_t *)(unsigned long)(cs->chunks);
111	if (DRM_COPY_FROM_USER(p->chunks_array, chunk_array_ptr,
112			       sizeof(uint64_t)*cs->num_chunks)) {
113		return -EFAULT;
114	}
115	p->nchunks = cs->num_chunks;
116	p->chunks = kcalloc(p->nchunks, sizeof(struct radeon_cs_chunk), GFP_KERNEL);
117	if (p->chunks == NULL) {
118		return -ENOMEM;
119	}
120	for (i = 0; i < p->nchunks; i++) {
121		struct drm_radeon_cs_chunk __user **chunk_ptr = NULL;
122		struct drm_radeon_cs_chunk user_chunk;
123		uint32_t __user *cdata;
124
125		chunk_ptr = (void __user*)(unsigned long)p->chunks_array[i];
126		if (DRM_COPY_FROM_USER(&user_chunk, chunk_ptr,
127				       sizeof(struct drm_radeon_cs_chunk))) {
128			return -EFAULT;
129		}
130		p->chunks[i].length_dw = user_chunk.length_dw;
131		p->chunks[i].kdata = NULL;
132		p->chunks[i].chunk_id = user_chunk.chunk_id;
133
134		if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_RELOCS) {
135			p->chunk_relocs_idx = i;
136		}
137		if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_IB) {
138			p->chunk_ib_idx = i;
139			/* zero length IB isn't useful */
140			if (p->chunks[i].length_dw == 0)
141				return -EINVAL;
142		}
143
144		p->chunks[i].length_dw = user_chunk.length_dw;
145		p->chunks[i].user_ptr = (void __user *)(unsigned long)user_chunk.chunk_data;
146
147		cdata = (uint32_t *)(unsigned long)user_chunk.chunk_data;
148		if (p->chunks[i].chunk_id != RADEON_CHUNK_ID_IB) {
149			size = p->chunks[i].length_dw * sizeof(uint32_t);
150			p->chunks[i].kdata = kmalloc(size, GFP_KERNEL);
151			if (p->chunks[i].kdata == NULL) {
152				return -ENOMEM;
153			}
154			if (DRM_COPY_FROM_USER(p->chunks[i].kdata,
155					       p->chunks[i].user_ptr, size)) {
156				return -EFAULT;
157			}
158		} else {
159			p->chunks[i].kpage[0] = kmalloc(PAGE_SIZE, GFP_KERNEL);
160			p->chunks[i].kpage[1] = kmalloc(PAGE_SIZE, GFP_KERNEL);
161			if (p->chunks[i].kpage[0] == NULL || p->chunks[i].kpage[1] == NULL) {
162				kfree(p->chunks[i].kpage[0]);
163				kfree(p->chunks[i].kpage[1]);
164				return -ENOMEM;
165			}
166			p->chunks[i].kpage_idx[0] = -1;
167			p->chunks[i].kpage_idx[1] = -1;
168			p->chunks[i].last_copied_page = -1;
169			p->chunks[i].last_page_index = ((p->chunks[i].length_dw * 4) - 1) / PAGE_SIZE;
170		}
171	}
172	if (p->chunks[p->chunk_ib_idx].length_dw > (16 * 1024)) {
173		DRM_ERROR("cs IB too big: %d\n",
174			  p->chunks[p->chunk_ib_idx].length_dw);
175		return -EINVAL;
176	}
177	return 0;
178}
179
180/**
181 * cs_parser_fini() - clean parser states
182 * @parser:	parser structure holding parsing context.
183 * @error:	error number
184 *
185 * If error is set than unvalidate buffer, otherwise just free memory
186 * used by parsing context.
187 **/
188static void radeon_cs_parser_fini(struct radeon_cs_parser *parser, int error)
189{
190	unsigned i;
191
192
193	if (!error && parser->ib)
194		ttm_eu_fence_buffer_objects(&parser->validated,
195					    parser->ib->fence);
196	else
197		ttm_eu_backoff_reservation(&parser->validated);
198
199	if (parser->relocs != NULL) {
200		for (i = 0; i < parser->nrelocs; i++) {
201			if (parser->relocs[i].gobj)
202				drm_gem_object_unreference_unlocked(parser->relocs[i].gobj);
203		}
204	}
205	kfree(parser->track);
206	kfree(parser->relocs);
207	kfree(parser->relocs_ptr);
208	for (i = 0; i < parser->nchunks; i++) {
209		kfree(parser->chunks[i].kdata);
210		kfree(parser->chunks[i].kpage[0]);
211		kfree(parser->chunks[i].kpage[1]);
212	}
213	kfree(parser->chunks);
214	kfree(parser->chunks_array);
215	radeon_ib_free(parser->rdev, &parser->ib);
216}
217
218int radeon_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
219{
220	struct radeon_device *rdev = dev->dev_private;
221	struct radeon_cs_parser parser;
222	struct radeon_cs_chunk *ib_chunk;
223	int r;
224
225	mutex_lock(&rdev->cs_mutex);
226	/* initialize parser */
227	memset(&parser, 0, sizeof(struct radeon_cs_parser));
228	parser.filp = filp;
229	parser.rdev = rdev;
230	parser.dev = rdev->dev;
231	parser.family = rdev->family;
232	r = radeon_cs_parser_init(&parser, data);
233	if (r) {
234		DRM_ERROR("Failed to initialize parser !\n");
235		radeon_cs_parser_fini(&parser, r);
236		mutex_unlock(&rdev->cs_mutex);
237		return r;
238	}
239	r =  radeon_ib_get(rdev, &parser.ib);
240	if (r) {
241		DRM_ERROR("Failed to get ib !\n");
242		radeon_cs_parser_fini(&parser, r);
243		mutex_unlock(&rdev->cs_mutex);
244		return r;
245	}
246	r = radeon_cs_parser_relocs(&parser);
247	if (r) {
248		if (r != -ERESTARTSYS)
249			DRM_ERROR("Failed to parse relocation %d!\n", r);
250		radeon_cs_parser_fini(&parser, r);
251		mutex_unlock(&rdev->cs_mutex);
252		return r;
253	}
254	/* Copy the packet into the IB, the parser will read from the
255	 * input memory (cached) and write to the IB (which can be
256	 * uncached). */
257	ib_chunk = &parser.chunks[parser.chunk_ib_idx];
258	parser.ib->length_dw = ib_chunk->length_dw;
259	r = radeon_cs_parse(&parser);
260	if (r || parser.parser_error) {
261		DRM_ERROR("Invalid command stream !\n");
262		radeon_cs_parser_fini(&parser, r);
263		mutex_unlock(&rdev->cs_mutex);
264		return r;
265	}
266	r = radeon_cs_finish_pages(&parser);
267	if (r) {
268		DRM_ERROR("Invalid command stream !\n");
269		radeon_cs_parser_fini(&parser, r);
270		mutex_unlock(&rdev->cs_mutex);
271		return r;
272	}
273	r = radeon_ib_schedule(rdev, parser.ib);
274	if (r) {
275		DRM_ERROR("Failed to schedule IB !\n");
276	}
277	radeon_cs_parser_fini(&parser, r);
278	mutex_unlock(&rdev->cs_mutex);
279	return r;
280}
281
282int radeon_cs_finish_pages(struct radeon_cs_parser *p)
283{
284	struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
285	int i;
286	int size = PAGE_SIZE;
287
288	for (i = ibc->last_copied_page + 1; i <= ibc->last_page_index; i++) {
289		if (i == ibc->last_page_index) {
290			size = (ibc->length_dw * 4) % PAGE_SIZE;
291			if (size == 0)
292				size = PAGE_SIZE;
293		}
294		
295		if (DRM_COPY_FROM_USER(p->ib->ptr + (i * (PAGE_SIZE/4)),
296				       ibc->user_ptr + (i * PAGE_SIZE),
297				       size))
298			return -EFAULT;
299	}
300	return 0;
301}
302
303int radeon_cs_update_pages(struct radeon_cs_parser *p, int pg_idx)
304{
305	int new_page;
306	struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
307	int i;
308	int size = PAGE_SIZE;
309
310	for (i = ibc->last_copied_page + 1; i < pg_idx; i++) {
311		if (DRM_COPY_FROM_USER(p->ib->ptr + (i * (PAGE_SIZE/4)),
312				       ibc->user_ptr + (i * PAGE_SIZE),
313				       PAGE_SIZE)) {
314			p->parser_error = -EFAULT;
315			return 0;
316		}
317	}
318
319	new_page = ibc->kpage_idx[0] < ibc->kpage_idx[1] ? 0 : 1;
320
321	if (pg_idx == ibc->last_page_index) {
322		size = (ibc->length_dw * 4) % PAGE_SIZE;
323			if (size == 0)
324				size = PAGE_SIZE;
325	}
326
327	if (DRM_COPY_FROM_USER(ibc->kpage[new_page],
328			       ibc->user_ptr + (pg_idx * PAGE_SIZE),
329			       size)) {
330		p->parser_error = -EFAULT;
331		return 0;
332	}
333
334	/* copy to IB here */
335	memcpy((void *)(p->ib->ptr+(pg_idx*(PAGE_SIZE/4))), ibc->kpage[new_page], size);
336
337	ibc->last_copied_page = pg_idx;
338	ibc->kpage_idx[new_page] = pg_idx;
339
340	return new_page;
341}