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

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/*
* 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 <drm/drmP.h>
#include <drm/radeon_drm.h>
#include "radeon_reg.h"
#include "radeon.h"
static 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];
p->dma_reloc_idx = 0;
/* 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 < i; j++) {
if (r->handle == p->relocs[j].handle) {
p->relocs_ptr[i] = &p->relocs[j];
duplicate = true;
break;
}
}
if (duplicate) {
p->relocs[i].handle = 0;
continue;
}
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 -ENOENT;
}
p->relocs_ptr[i] = &p->relocs[i];
p->relocs[i].robj = gem_to_radeon_bo(p->relocs[i].gobj);
p->relocs[i].lobj.bo = p->relocs[i].robj;
p->relocs[i].lobj.written = !!r->write_domain;
/* the first reloc of an UVD job is the
msg and that must be in VRAM */
if (p->ring == R600_RING_TYPE_UVD_INDEX && i == 0) {
/* TODO: is this still needed for NI+ ? */
p->relocs[i].lobj.domain =
RADEON_GEM_DOMAIN_VRAM;
p->relocs[i].lobj.alt_domain =
RADEON_GEM_DOMAIN_VRAM;
} else {
uint32_t domain = r->write_domain ?
r->write_domain : r->read_domains;
p->relocs[i].lobj.domain = domain;
if (domain == RADEON_GEM_DOMAIN_VRAM)
domain |= RADEON_GEM_DOMAIN_GTT;
p->relocs[i].lobj.alt_domain = domain;
}
p->relocs[i].lobj.tv.bo = &p->relocs[i].robj->tbo;
p->relocs[i].handle = r->handle;
radeon_bo_list_add_object(&p->relocs[i].lobj,
&p->validated);
}
return radeon_bo_list_validate(&p->ticket, &p->validated, p->ring);
}
static int radeon_cs_get_ring(struct radeon_cs_parser *p, u32 ring, s32 priority)
{
p->priority = priority;
switch (ring) {
default:
DRM_ERROR("unknown ring id: %d\n", ring);
return -EINVAL;
case RADEON_CS_RING_GFX:
p->ring = RADEON_RING_TYPE_GFX_INDEX;
break;
case RADEON_CS_RING_COMPUTE:
if (p->rdev->family >= CHIP_TAHITI) {
if (p->priority > 0)
p->ring = CAYMAN_RING_TYPE_CP1_INDEX;
else
p->ring = CAYMAN_RING_TYPE_CP2_INDEX;
} else
p->ring = RADEON_RING_TYPE_GFX_INDEX;
break;
case RADEON_CS_RING_DMA:
if (p->rdev->family >= CHIP_CAYMAN) {
if (p->priority > 0)
p->ring = R600_RING_TYPE_DMA_INDEX;
else
p->ring = CAYMAN_RING_TYPE_DMA1_INDEX;
} else if (p->rdev->family >= CHIP_R600) {
p->ring = R600_RING_TYPE_DMA_INDEX;
} else {
return -EINVAL;
}
break;
case RADEON_CS_RING_UVD:
p->ring = R600_RING_TYPE_UVD_INDEX;
break;
}
return 0;
}
static void radeon_cs_sync_rings(struct radeon_cs_parser *p)
{
int i;
for (i = 0; i < p->nrelocs; i++) {
if (!p->relocs[i].robj)
continue;
radeon_ib_sync_to(&p->ib, p->relocs[i].robj->tbo.sync_obj);
}
}
/* XXX: note that this is called from the legacy UMS CS ioctl as well */
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;
u32 ring = RADEON_CS_RING_GFX;
s32 priority = 0;
if (!cs->num_chunks) {
return 0;
}
/* get chunks */
INIT_LIST_HEAD(&p->validated);
p->idx = 0;
p->ib.sa_bo = NULL;
p->ib.semaphore = NULL;
p->const_ib.sa_bo = NULL;
p->const_ib.semaphore = NULL;
p->chunk_ib_idx = -1;
p->chunk_relocs_idx = -1;
p->chunk_flags_idx = -1;
p->chunk_const_ib_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->cs_flags = 0;
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;
p->chunks[i].user_ptr = (void __user *)(unsigned long)user_chunk.chunk_data;
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;
}
if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_CONST_IB) {
p->chunk_const_ib_idx = i;
/* zero length CONST IB isn't useful */
if (p->chunks[i].length_dw == 0)
return -EINVAL;
}
if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS) {
p->chunk_flags_idx = i;
/* zero length flags aren't useful */
if (p->chunks[i].length_dw == 0)
return -EINVAL;
}
cdata = (uint32_t *)(unsigned long)user_chunk.chunk_data;
if ((p->chunks[i].chunk_id == RADEON_CHUNK_ID_RELOCS) ||
(p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS)) {
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;
}
if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS) {
p->cs_flags = p->chunks[i].kdata[0];
if (p->chunks[i].length_dw > 1)
ring = p->chunks[i].kdata[1];
if (p->chunks[i].length_dw > 2)
priority = (s32)p->chunks[i].kdata[2];
}
}
}
/* these are KMS only */
if (p->rdev) {
if ((p->cs_flags & RADEON_CS_USE_VM) &&
!p->rdev->vm_manager.enabled) {
DRM_ERROR("VM not active on asic!\n");
return -EINVAL;
}
if (radeon_cs_get_ring(p, ring, priority))
return -EINVAL;
/* we only support VM on some SI+ rings */
if ((p->rdev->asic->ring[p->ring].cs_parse == NULL) &&
((p->cs_flags & RADEON_CS_USE_VM) == 0)) {
DRM_ERROR("Ring %d requires VM!\n", p->ring);
return -EINVAL;
}
}
/* deal with non-vm */
if ((p->chunk_ib_idx != -1) &&
((p->cs_flags & RADEON_CS_USE_VM) == 0) &&
(p->chunks[p->chunk_ib_idx].chunk_id == RADEON_CHUNK_ID_IB)) {
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;
}
if (p->rdev && (p->rdev->flags & RADEON_IS_AGP)) {
p->chunks[p->chunk_ib_idx].kpage[0] = kmalloc(PAGE_SIZE, GFP_KERNEL);
p->chunks[p->chunk_ib_idx].kpage[1] = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (p->chunks[p->chunk_ib_idx].kpage[0] == NULL ||
p->chunks[p->chunk_ib_idx].kpage[1] == NULL) {
kfree(p->chunks[p->chunk_ib_idx].kpage[0]);
kfree(p->chunks[p->chunk_ib_idx].kpage[1]);
p->chunks[p->chunk_ib_idx].kpage[0] = NULL;
p->chunks[p->chunk_ib_idx].kpage[1] = NULL;
return -ENOMEM;
}
}
p->chunks[p->chunk_ib_idx].kpage_idx[0] = -1;
p->chunks[p->chunk_ib_idx].kpage_idx[1] = -1;
p->chunks[p->chunk_ib_idx].last_copied_page = -1;
p->chunks[p->chunk_ib_idx].last_page_index =
((p->chunks[p->chunk_ib_idx].length_dw * 4) - 1) / PAGE_SIZE;
}
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, bool backoff)
{
unsigned i;
if (!error) {
ttm_eu_fence_buffer_objects(&parser->ticket,
&parser->validated,
parser->ib.fence);
} else if (backoff) {
ttm_eu_backoff_reservation(&parser->ticket,
&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);
if ((parser->rdev->flags & RADEON_IS_AGP)) {
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);
radeon_ib_free(parser->rdev, &parser->const_ib);
}
static int radeon_cs_ib_chunk(struct radeon_device *rdev,
struct radeon_cs_parser *parser)
{
struct radeon_cs_chunk *ib_chunk;
int r;
if (parser->chunk_ib_idx == -1)
return 0;
if (parser->cs_flags & RADEON_CS_USE_VM)
return 0;
ib_chunk = &parser->chunks[parser->chunk_ib_idx];
/* Copy the packet into the IB, the parser will read from the
* input memory (cached) and write to the IB (which can be
* uncached).
*/
r = radeon_ib_get(rdev, parser->ring, &parser->ib,
NULL, ib_chunk->length_dw * 4);
if (r) {
DRM_ERROR("Failed to get ib !\n");
return r;
}
parser->ib.length_dw = ib_chunk->length_dw;
r = radeon_cs_parse(rdev, parser->ring, parser);
if (r || parser->parser_error) {
DRM_ERROR("Invalid command stream !\n");
return r;
}
r = radeon_cs_finish_pages(parser);
if (r) {
DRM_ERROR("Invalid command stream !\n");
return r;
}
if (parser->ring == R600_RING_TYPE_UVD_INDEX)
radeon_uvd_note_usage(rdev);
radeon_cs_sync_rings(parser);
r = radeon_ib_schedule(rdev, &parser->ib, NULL);
if (r) {
DRM_ERROR("Failed to schedule IB !\n");
}
return r;
}
static int radeon_bo_vm_update_pte(struct radeon_cs_parser *parser,
struct radeon_vm *vm)
{
struct radeon_device *rdev = parser->rdev;
struct radeon_bo_list *lobj;
struct radeon_bo *bo;
int r;
r = radeon_vm_bo_update_pte(rdev, vm, rdev->ring_tmp_bo.bo, &rdev->ring_tmp_bo.bo->tbo.mem);
if (r) {
return r;
}
list_for_each_entry(lobj, &parser->validated, tv.head) {
bo = lobj->bo;
r = radeon_vm_bo_update_pte(parser->rdev, vm, bo, &bo->tbo.mem);
if (r) {
return r;
}
}
return 0;
}
static int radeon_cs_ib_vm_chunk(struct radeon_device *rdev,
struct radeon_cs_parser *parser)
{
struct radeon_cs_chunk *ib_chunk;
struct radeon_fpriv *fpriv = parser->filp->driver_priv;
struct radeon_vm *vm = &fpriv->vm;
int r;
if (parser->chunk_ib_idx == -1)
return 0;
if ((parser->cs_flags & RADEON_CS_USE_VM) == 0)
return 0;
if ((rdev->family >= CHIP_TAHITI) &&
(parser->chunk_const_ib_idx != -1)) {
ib_chunk = &parser->chunks[parser->chunk_const_ib_idx];
if (ib_chunk->length_dw > RADEON_IB_VM_MAX_SIZE) {
DRM_ERROR("cs IB CONST too big: %d\n", ib_chunk->length_dw);
return -EINVAL;
}
r = radeon_ib_get(rdev, parser->ring, &parser->const_ib,
vm, ib_chunk->length_dw * 4);
if (r) {
DRM_ERROR("Failed to get const ib !\n");
return r;
}
parser->const_ib.is_const_ib = true;
parser->const_ib.length_dw = ib_chunk->length_dw;
/* Copy the packet into the IB */
if (DRM_COPY_FROM_USER(parser->const_ib.ptr, ib_chunk->user_ptr,
ib_chunk->length_dw * 4)) {
return -EFAULT;
}
r = radeon_ring_ib_parse(rdev, parser->ring, &parser->const_ib);
if (r) {
return r;
}
}
ib_chunk = &parser->chunks[parser->chunk_ib_idx];
if (ib_chunk->length_dw > RADEON_IB_VM_MAX_SIZE) {
DRM_ERROR("cs IB too big: %d\n", ib_chunk->length_dw);
return -EINVAL;
}
r = radeon_ib_get(rdev, parser->ring, &parser->ib,
vm, ib_chunk->length_dw * 4);
if (r) {
DRM_ERROR("Failed to get ib !\n");
return r;
}
parser->ib.length_dw = ib_chunk->length_dw;
/* Copy the packet into the IB */
if (DRM_COPY_FROM_USER(parser->ib.ptr, ib_chunk->user_ptr,
ib_chunk->length_dw * 4)) {
return -EFAULT;
}
r = radeon_ring_ib_parse(rdev, parser->ring, &parser->ib);
if (r) {
return r;
}
if (parser->ring == R600_RING_TYPE_UVD_INDEX)
radeon_uvd_note_usage(rdev);
mutex_lock(&rdev->vm_manager.lock);
mutex_lock(&vm->mutex);
r = radeon_vm_alloc_pt(rdev, vm);
if (r) {
goto out;
}
r = radeon_bo_vm_update_pte(parser, vm);
if (r) {
goto out;
}
radeon_cs_sync_rings(parser);
radeon_ib_sync_to(&parser->ib, vm->fence);
radeon_ib_sync_to(&parser->ib, radeon_vm_grab_id(
rdev, vm, parser->ring));
if ((rdev->family >= CHIP_TAHITI) &&
(parser->chunk_const_ib_idx != -1)) {
r = radeon_ib_schedule(rdev, &parser->ib, &parser->const_ib);
} else {
r = radeon_ib_schedule(rdev, &parser->ib, NULL);
}
if (!r) {
radeon_vm_fence(rdev, vm, parser->ib.fence);
}
out:
radeon_vm_add_to_lru(rdev, vm);
mutex_unlock(&vm->mutex);
mutex_unlock(&rdev->vm_manager.lock);
return r;
}
static int radeon_cs_handle_lockup(struct radeon_device *rdev, int r)
{
if (r == -EDEADLK) {
r = radeon_gpu_reset(rdev);
if (!r)
r = -EAGAIN;
}
return r;
}
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;
int r;
down_read(&rdev->exclusive_lock);
if (!rdev->accel_working) {
up_read(&rdev->exclusive_lock);
return -EBUSY;
}
/* initialize parser */
memset(&parser, 0, sizeof(struct radeon_cs_parser));
parser.filp = filp;
parser.rdev = rdev;
parser.dev = rdev->dev;
parser.family = rdev->family;
r = radeon_cs_parser_init(&parser, data);
if (r) {
DRM_ERROR("Failed to initialize parser !\n");
radeon_cs_parser_fini(&parser, r, false);
up_read(&rdev->exclusive_lock);
r = radeon_cs_handle_lockup(rdev, r);
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, false);
up_read(&rdev->exclusive_lock);
r = radeon_cs_handle_lockup(rdev, r);
return r;
}
r = radeon_cs_ib_chunk(rdev, &parser);
if (r) {
goto out;
}
r = radeon_cs_ib_vm_chunk(rdev, &parser);
if (r) {
goto out;
}
out:
radeon_cs_parser_fini(&parser, r, true);
up_read(&rdev->exclusive_lock);
r = radeon_cs_handle_lockup(rdev, r);
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;
}
static 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;
bool copy1 = (p->rdev && (p->rdev->flags & RADEON_IS_AGP)) ?
false : true;
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;
}
}
if (pg_idx == ibc->last_page_index) {
size = (ibc->length_dw * 4) % PAGE_SIZE;
if (size == 0)
size = PAGE_SIZE;
}
new_page = ibc->kpage_idx[0] < ibc->kpage_idx[1] ? 0 : 1;
if (copy1)
ibc->kpage[new_page] = p->ib.ptr + (pg_idx * (PAGE_SIZE / 4));
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 for non single case */
if (!copy1)
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;
}
u32 radeon_get_ib_value(struct radeon_cs_parser *p, int idx)
{
struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
u32 pg_idx, pg_offset;
u32 idx_value = 0;
int new_page;
pg_idx = (idx * 4) / PAGE_SIZE;
pg_offset = (idx * 4) % PAGE_SIZE;
if (ibc->kpage_idx[0] == pg_idx)
return ibc->kpage[0][pg_offset/4];
if (ibc->kpage_idx[1] == pg_idx)
return ibc->kpage[1][pg_offset/4];
new_page = radeon_cs_update_pages(p, pg_idx);
if (new_page < 0) {
p->parser_error = new_page;
return 0;
}
idx_value = ibc->kpage[new_page][pg_offset/4];
return idx_value;
}
/**
* radeon_cs_packet_parse() - parse cp packet and point ib index to next packet
* @parser: parser structure holding parsing context.
* @pkt: where to store packet information
*
* Assume that chunk_ib_index is properly set. Will return -EINVAL
* if packet is bigger than remaining ib size. or if packets is unknown.
**/
int radeon_cs_packet_parse(struct radeon_cs_parser *p,
struct radeon_cs_packet *pkt,
unsigned idx)
{
struct radeon_cs_chunk *ib_chunk = &p->chunks[p->chunk_ib_idx];
struct radeon_device *rdev = p->rdev;
uint32_t header;
if (idx >= ib_chunk->length_dw) {
DRM_ERROR("Can not parse packet at %d after CS end %d !\n",
idx, ib_chunk->length_dw);
return -EINVAL;
}
header = radeon_get_ib_value(p, idx);
pkt->idx = idx;
pkt->type = RADEON_CP_PACKET_GET_TYPE(header);
pkt->count = RADEON_CP_PACKET_GET_COUNT(header);
pkt->one_reg_wr = 0;
switch (pkt->type) {
case RADEON_PACKET_TYPE0:
if (rdev->family < CHIP_R600) {
pkt->reg = R100_CP_PACKET0_GET_REG(header);
pkt->one_reg_wr =
RADEON_CP_PACKET0_GET_ONE_REG_WR(header);
} else
pkt->reg = R600_CP_PACKET0_GET_REG(header);
break;
case RADEON_PACKET_TYPE3:
pkt->opcode = RADEON_CP_PACKET3_GET_OPCODE(header);
break;
case RADEON_PACKET_TYPE2:
pkt->count = -1;
break;
default:
DRM_ERROR("Unknown packet type %d at %d !\n", pkt->type, idx);
return -EINVAL;
}
if ((pkt->count + 1 + pkt->idx) >= ib_chunk->length_dw) {
DRM_ERROR("Packet (%d:%d:%d) end after CS buffer (%d) !\n",
pkt->idx, pkt->type, pkt->count, ib_chunk->length_dw);
return -EINVAL;
}
return 0;
}
/**
* radeon_cs_packet_next_is_pkt3_nop() - test if the next packet is P3 NOP
* @p: structure holding the parser context.
*
* Check if the next packet is NOP relocation packet3.
**/
bool radeon_cs_packet_next_is_pkt3_nop(struct radeon_cs_parser *p)
{
struct radeon_cs_packet p3reloc;
int r;
r = radeon_cs_packet_parse(p, &p3reloc, p->idx);
if (r)
return false;
if (p3reloc.type != RADEON_PACKET_TYPE3)
return false;
if (p3reloc.opcode != RADEON_PACKET3_NOP)
return false;
return true;
}
/**
* radeon_cs_dump_packet() - dump raw packet context
* @p: structure holding the parser context.
* @pkt: structure holding the packet.
*
* Used mostly for debugging and error reporting.
**/
void radeon_cs_dump_packet(struct radeon_cs_parser *p,
struct radeon_cs_packet *pkt)
{
volatile uint32_t *ib;
unsigned i;
unsigned idx;
ib = p->ib.ptr;
idx = pkt->idx;
for (i = 0; i <= (pkt->count + 1); i++, idx++)
DRM_INFO("ib[%d]=0x%08X\n", idx, ib[idx]);
}
/**
* radeon_cs_packet_next_reloc() - parse next (should be reloc) packet
* @parser: parser structure holding parsing context.
* @data: pointer to relocation data
* @offset_start: starting offset
* @offset_mask: offset mask (to align start offset on)
* @reloc: reloc informations
*
* Check if next packet is relocation packet3, do bo validation and compute
* GPU offset using the provided start.
**/
int radeon_cs_packet_next_reloc(struct radeon_cs_parser *p,
struct radeon_cs_reloc **cs_reloc,
int nomm)
{
struct radeon_cs_chunk *relocs_chunk;
struct radeon_cs_packet p3reloc;
unsigned idx;
int r;
if (p->chunk_relocs_idx == -1) {
DRM_ERROR("No relocation chunk !\n");
return -EINVAL;
}
*cs_reloc = NULL;
relocs_chunk = &p->chunks[p->chunk_relocs_idx];
r = radeon_cs_packet_parse(p, &p3reloc, p->idx);
if (r)
return r;
p->idx += p3reloc.count + 2;
if (p3reloc.type != RADEON_PACKET_TYPE3 ||
p3reloc.opcode != RADEON_PACKET3_NOP) {
DRM_ERROR("No packet3 for relocation for packet at %d.\n",
p3reloc.idx);
radeon_cs_dump_packet(p, &p3reloc);
return -EINVAL;
}
idx = radeon_get_ib_value(p, p3reloc.idx + 1);
if (idx >= relocs_chunk->length_dw) {
DRM_ERROR("Relocs at %d after relocations chunk end %d !\n",
idx, relocs_chunk->length_dw);
radeon_cs_dump_packet(p, &p3reloc);
return -EINVAL;
}
/* FIXME: we assume reloc size is 4 dwords */
if (nomm) {
*cs_reloc = p->relocs;
(*cs_reloc)->lobj.gpu_offset =
(u64)relocs_chunk->kdata[idx + 3] << 32;
(*cs_reloc)->lobj.gpu_offset |= relocs_chunk->kdata[idx + 0];
} else
*cs_reloc = p->relocs_ptr[(idx / 4)];
return 0;
}
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