[linux-2.6-block.git] / drivers / gpu / drm / radeon / radeon_cs.c

/*
 * Copyright 2008 Jerome Glisse.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 *    Jerome Glisse <glisse@freedesktop.org>
 */
#include "drmP.h"
#include "radeon_drm.h"
#include "radeon_reg.h"
#include "radeon.h"

void r100_cs_dump_packet(struct radeon_cs_parser *p,
			 struct radeon_cs_packet *pkt);

int radeon_cs_parser_relocs(struct radeon_cs_parser *p)
{
	struct drm_device *ddev = p->rdev->ddev;
	struct radeon_cs_chunk *chunk;
	unsigned i, j;
	bool duplicate;

	if (p->chunk_relocs_idx == -1) {
		return 0;
	}
	chunk = &p->chunks[p->chunk_relocs_idx];
	/* FIXME: we assume that each relocs use 4 dwords */
	p->nrelocs = chunk->length_dw / 4;
	p->relocs_ptr = kcalloc(p->nrelocs, sizeof(void *), GFP_KERNEL);
	if (p->relocs_ptr == NULL) {
		return -ENOMEM;
	}
	p->relocs = kcalloc(p->nrelocs, sizeof(struct radeon_cs_reloc), GFP_KERNEL);
	if (p->relocs == NULL) {
		return -ENOMEM;
	}
	for (i = 0; i < p->nrelocs; i++) {
		struct drm_radeon_cs_reloc *r;

		duplicate = false;
		r = (struct drm_radeon_cs_reloc *)&chunk->kdata[i*4];
		for (j = 0; j < p->nrelocs; j++) {
			if (r->handle == p->relocs[j].handle) {
				p->relocs_ptr[i] = &p->relocs[j];
				duplicate = true;
				break;
			}
		}
		if (!duplicate) {
			p->relocs[i].gobj = drm_gem_object_lookup(ddev,
								  p->filp,
								  r->handle);
			if (p->relocs[i].gobj == NULL) {
				DRM_ERROR("gem object lookup failed 0x%x\n",
					  r->handle);
				return -EINVAL;
			}
			p->relocs_ptr[i] = &p->relocs[i];
			p->relocs[i].robj = p->relocs[i].gobj->driver_private;
			p->relocs[i].lobj.bo = p->relocs[i].robj;
			p->relocs[i].lobj.rdomain = r->read_domains;
			p->relocs[i].lobj.wdomain = r->write_domain;
			p->relocs[i].handle = r->handle;
			p->relocs[i].flags = r->flags;
			INIT_LIST_HEAD(&p->relocs[i].lobj.list);
			radeon_bo_list_add_object(&p->relocs[i].lobj,
						&p->validated);
		}
	}
	return radeon_bo_list_validate(&p->validated);
}

int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
{
	struct drm_radeon_cs *cs = data;
	uint64_t *chunk_array_ptr;
	unsigned size, i;

	if (!cs->num_chunks) {
		return 0;
	}
	/* get chunks */
	INIT_LIST_HEAD(&p->validated);
	p->idx = 0;
	p->chunk_ib_idx = -1;
	p->chunk_relocs_idx = -1;
	p->chunks_array = kcalloc(cs->num_chunks, sizeof(uint64_t), GFP_KERNEL);
	if (p->chunks_array == NULL) {
		return -ENOMEM;
	}
	chunk_array_ptr = (uint64_t *)(unsigned long)(cs->chunks);
	if (DRM_COPY_FROM_USER(p->chunks_array, chunk_array_ptr,
			       sizeof(uint64_t)*cs->num_chunks)) {
		return -EFAULT;
	}
	p->nchunks = cs->num_chunks;
	p->chunks = kcalloc(p->nchunks, sizeof(struct radeon_cs_chunk), GFP_KERNEL);
	if (p->chunks == NULL) {
		return -ENOMEM;
	}
	for (i = 0; i < p->nchunks; i++) {
		struct drm_radeon_cs_chunk __user **chunk_ptr = NULL;
		struct drm_radeon_cs_chunk user_chunk;
		uint32_t __user *cdata;

		chunk_ptr = (void __user*)(unsigned long)p->chunks_array[i];
		if (DRM_COPY_FROM_USER(&user_chunk, chunk_ptr,
				       sizeof(struct drm_radeon_cs_chunk))) {
			return -EFAULT;
		}
		p->chunks[i].length_dw = user_chunk.length_dw;
		p->chunks[i].kdata = NULL;
		p->chunks[i].chunk_id = user_chunk.chunk_id;

		if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_RELOCS) {
			p->chunk_relocs_idx = i;
		}
		if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_IB) {
			p->chunk_ib_idx = i;
			/* zero length IB isn't useful */
			if (p->chunks[i].length_dw == 0)
				return -EINVAL;
		}

		p->chunks[i].length_dw = user_chunk.length_dw;
		p->chunks[i].user_ptr = (void __user *)(unsigned long)user_chunk.chunk_data;

		cdata = (uint32_t *)(unsigned long)user_chunk.chunk_data;
		if (p->chunks[i].chunk_id != RADEON_CHUNK_ID_IB) {
			size = p->chunks[i].length_dw * sizeof(uint32_t);
			p->chunks[i].kdata = kmalloc(size, GFP_KERNEL);
			if (p->chunks[i].kdata == NULL) {
				return -ENOMEM;
			}
			if (DRM_COPY_FROM_USER(p->chunks[i].kdata,
					       p->chunks[i].user_ptr, size)) {
				return -EFAULT;
			}
		} else {
			p->chunks[i].kpage[0] = kmalloc(PAGE_SIZE, GFP_KERNEL);
			p->chunks[i].kpage[1] = kmalloc(PAGE_SIZE, GFP_KERNEL);
			if (p->chunks[i].kpage[0] == NULL || p->chunks[i].kpage[1] == NULL) {
				kfree(p->chunks[i].kpage[0]);
				kfree(p->chunks[i].kpage[1]);
				return -ENOMEM;
			}
			p->chunks[i].kpage_idx[0] = -1;
			p->chunks[i].kpage_idx[1] = -1;
			p->chunks[i].last_copied_page = -1;
			p->chunks[i].last_page_index = ((p->chunks[i].length_dw * 4) - 1) / PAGE_SIZE;
		}
	}
	if (p->chunks[p->chunk_ib_idx].length_dw > (16 * 1024)) {
		DRM_ERROR("cs IB too big: %d\n",
			  p->chunks[p->chunk_ib_idx].length_dw);
		return -EINVAL;
	}
	return 0;
}

/**
 * cs_parser_fini() - clean parser states
 * @parser:	parser structure holding parsing context.
 * @error:	error number
 *
 * If error is set than unvalidate buffer, otherwise just free memory
 * used by parsing context.
 **/
static void radeon_cs_parser_fini(struct radeon_cs_parser *parser, int error)
{
	unsigned i;

	if (!error && parser->ib) {
		radeon_bo_list_fence(&parser->validated, parser->ib->fence);
	}
	radeon_bo_list_unreserve(&parser->validated);
	if (parser->relocs != NULL) {
		for (i = 0; i < parser->nrelocs; i++) {
			if (parser->relocs[i].gobj)
				drm_gem_object_unreference_unlocked(parser->relocs[i].gobj);
		}
	}
	kfree(parser->track);
	kfree(parser->relocs);
	kfree(parser->relocs_ptr);
	for (i = 0; i < parser->nchunks; i++) {
		kfree(parser->chunks[i].kdata);
		kfree(parser->chunks[i].kpage[0]);
		kfree(parser->chunks[i].kpage[1]);
	}
	kfree(parser->chunks);
	kfree(parser->chunks_array);
	radeon_ib_free(parser->rdev, &parser->ib);
}

int radeon_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
{
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_cs_parser parser;
	struct radeon_cs_chunk *ib_chunk;
	int r;

	mutex_lock(&rdev->cs_mutex);
	if (rdev->gpu_lockup) {
		mutex_unlock(&rdev->cs_mutex);
		return -EINVAL;
	}
	/* initialize parser */
	memset(&parser, 0, sizeof(struct radeon_cs_parser));
	parser.filp = filp;
	parser.rdev = rdev;
	parser.dev = rdev->dev;
	r = radeon_cs_parser_init(&parser, data);
	if (r) {
		DRM_ERROR("Failed to initialize parser !\n");
		radeon_cs_parser_fini(&parser, r);
		mutex_unlock(&rdev->cs_mutex);
		return r;
	}
	r =  radeon_ib_get(rdev, &parser.ib);
	if (r) {
		DRM_ERROR("Failed to get ib !\n");
		radeon_cs_parser_fini(&parser, r);
		mutex_unlock(&rdev->cs_mutex);
		return r;
	}
	r = radeon_cs_parser_relocs(&parser);
	if (r) {
		if (r != -ERESTARTSYS)
			DRM_ERROR("Failed to parse relocation %d!\n", r);
		radeon_cs_parser_fini(&parser, r);
		mutex_unlock(&rdev->cs_mutex);
		return r;
	}
	/* Copy the packet into the IB, the parser will read from the
	 * input memory (cached) and write to the IB (which can be
	 * uncached). */
	ib_chunk = &parser.chunks[parser.chunk_ib_idx];
	parser.ib->length_dw = ib_chunk->length_dw;
	r = radeon_cs_parse(&parser);
	if (r || parser.parser_error) {
		DRM_ERROR("Invalid command stream !\n");
		radeon_cs_parser_fini(&parser, r);
		mutex_unlock(&rdev->cs_mutex);
		return r;
	}
	r = radeon_cs_finish_pages(&parser);
	if (r) {
		DRM_ERROR("Invalid command stream !\n");
		radeon_cs_parser_fini(&parser, r);
		mutex_unlock(&rdev->cs_mutex);
		return r;
	}
	r = radeon_ib_schedule(rdev, parser.ib);
	if (r) {
		DRM_ERROR("Faild to schedule IB !\n");
	}
	radeon_cs_parser_fini(&parser, r);
	mutex_unlock(&rdev->cs_mutex);
	return r;
}

int radeon_cs_finish_pages(struct radeon_cs_parser *p)
{
	struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
	int i;
	int size = PAGE_SIZE;

	for (i = ibc->last_copied_page + 1; i <= ibc->last_page_index; i++) {
		if (i == ibc->last_page_index) {
			size = (ibc->length_dw * 4) % PAGE_SIZE;
			if (size == 0)
				size = PAGE_SIZE;
		}
		
		if (DRM_COPY_FROM_USER(p->ib->ptr + (i * (PAGE_SIZE/4)),
				       ibc->user_ptr + (i * PAGE_SIZE),
				       size))
			return -EFAULT;
	}
	return 0;
}

int radeon_cs_update_pages(struct radeon_cs_parser *p, int pg_idx)
{
	int new_page;
	struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
	int i;
	int size = PAGE_SIZE;

	for (i = ibc->last_copied_page + 1; i < pg_idx; i++) {
		if (DRM_COPY_FROM_USER(p->ib->ptr + (i * (PAGE_SIZE/4)),
				       ibc->user_ptr + (i * PAGE_SIZE),
				       PAGE_SIZE)) {
			p->parser_error = -EFAULT;
			return 0;
		}
	}

	new_page = ibc->kpage_idx[0] < ibc->kpage_idx[1] ? 0 : 1;

	if (pg_idx == ibc->last_page_index) {
		size = (ibc->length_dw * 4) % PAGE_SIZE;
			if (size == 0)
				size = PAGE_SIZE;
	}

	if (DRM_COPY_FROM_USER(ibc->kpage[new_page],
			       ibc->user_ptr + (pg_idx * PAGE_SIZE),
			       size)) {
		p->parser_error = -EFAULT;
		return 0;
	}

	/* copy to IB here */
	memcpy((void *)(p->ib->ptr+(pg_idx*(PAGE_SIZE/4))), ibc->kpage[new_page], size);

	ibc->last_copied_page = pg_idx;
	ibc->kpage_idx[new_page] = pg_idx;

	return new_page;
}
Commit	Line	Data
771fe6b9 JG	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
	32	void r100_cs_dump_packet(struct radeon_cs_parser *p,
	33	struct radeon_cs_packet *pkt);
	34
	35	int 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[i4];
	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 -EINVAL;
76	}
77	p->relocs_ptr[i] = &p->relocs[i];
78	p->relocs[i].robj = p->relocs[i].gobj->driver_private;
4c788679	79	p->relocs[i].lobj.bo = p->relocs[i].robj;
771fe6b9 JG	80	p->relocs[i].lobj.rdomain = r->read_domains;
	81	p->relocs[i].lobj.wdomain = r->write_domain;
	82	p->relocs[i].handle = r->handle;
	83	p->relocs[i].flags = r->flags;
	84	INIT_LIST_HEAD(&p->relocs[i].lobj.list);
4c788679 JG	85	radeon_bo_list_add_object(&p->relocs[i].lobj,
4c788679 JG	86	&p->validated);
771fe6b9 JG	87	}
771fe6b9 JG	88	}
94429bb6	89	return radeon_bo_list_validate(&p->validated);
771fe6b9 JG	90	}
	91
	92	int 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	}
5176fdc4 DA	130	p->chunks[i].length_dw = user_chunk.length_dw;
5176fdc4 DA	131	p->chunks[i].kdata = NULL;
771fe6b9	132	p->chunks[i].chunk_id = user_chunk.chunk_id;
5176fdc4	133
771fe6b9 JG	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;
5176fdc4 DA	139	/* zero length IB isn't useful */
	140	if (p->chunks[i].length_dw == 0)
	141	return -EINVAL;
771fe6b9	142	}
5176fdc4	143
771fe6b9	144	p->chunks[i].length_dw = user_chunk.length_dw;
513bcb46	145	p->chunks[i].user_ptr = (void __user *)(unsigned long)user_chunk.chunk_data;
771fe6b9	146
513bcb46 DA	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;
771fe6b9 JG	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	**/
	188	static void radeon_cs_parser_fini(struct radeon_cs_parser *parser, int error)
	189	{
	190	unsigned i;
	191
94429bb6 JG	192	if (!error && parser->ib) {
94429bb6 JG	193	radeon_bo_list_fence(&parser->validated, parser->ib->fence);
771fe6b9	194	}
94429bb6	195	radeon_bo_list_unreserve(&parser->validated);
fcbc451b PN	196	if (parser->relocs != NULL) {
	197	for (i = 0; i < parser->nrelocs; i++) {
	198	if (parser->relocs[i].gobj)
	199	drm_gem_object_unreference_unlocked(parser->relocs[i].gobj);
	200	}
771fe6b9	201	}
48e113e5	202	kfree(parser->track);
771fe6b9 JG	203	kfree(parser->relocs);
	204	kfree(parser->relocs_ptr);
	205	for (i = 0; i < parser->nchunks; i++) {
	206	kfree(parser->chunks[i].kdata);
513bcb46 DA	207	kfree(parser->chunks[i].kpage[0]);
513bcb46 DA	208	kfree(parser->chunks[i].kpage[1]);
771fe6b9 JG	209	}
	210	kfree(parser->chunks);
	211	kfree(parser->chunks_array);
	212	radeon_ib_free(parser->rdev, &parser->ib);
	213	}
	214
	215	int radeon_cs_ioctl(struct drm_device dev, void data, struct drm_file *filp)
	216	{
	217	struct radeon_device *rdev = dev->dev_private;
	218	struct radeon_cs_parser parser;
	219	struct radeon_cs_chunk *ib_chunk;
	220	int r;
	221
	222	mutex_lock(&rdev->cs_mutex);
	223	if (rdev->gpu_lockup) {
	224	mutex_unlock(&rdev->cs_mutex);
	225	return -EINVAL;
	226	}
	227	/* initialize parser */
	228	memset(&parser, 0, sizeof(struct radeon_cs_parser));
	229	parser.filp = filp;
	230	parser.rdev = rdev;
c8c15ff1	231	parser.dev = rdev->dev;
771fe6b9 JG	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) {
97f23b3d DA	248	if (r != -ERESTARTSYS)
97f23b3d DA	249	DRM_ERROR("Failed to parse relocation %d!\n", r);
771fe6b9 JG	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;
771fe6b9	259	r = radeon_cs_parse(&parser);
513bcb46 DA	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);
771fe6b9 JG	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("Faild to schedule IB !\n");
	276	}
	277	radeon_cs_parser_fini(&parser, r);
	278	mutex_unlock(&rdev->cs_mutex);
	279	return r;
	280	}
513bcb46 DA	281
	282	int 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
	303	int radeon_cs_update_pages(struct radeon_cs_parser *p, int pg_idx)
	304	{
	305	int new_page;
513bcb46 DA	306	struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
	307	int i;
	308	int size = PAGE_SIZE;
	309
c5e617e2	310	for (i = ibc->last_copied_page + 1; i < pg_idx; i++) {
513bcb46 DA	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	}