/*
* 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;
}
