/*
* 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 <[email protected]>
*/
#include <linux/list_sort.h>
#include <linux/pci.h>
#include <linux/uaccess.h>
#include <drm/drm_device.h>
#include <drm/drm_file.h>
#include <drm/radeon_drm.h>
#include "radeon.h"
#include "radeon_reg.h"
#include "radeon_trace.h"
#define RADEON_CS_MAX_PRIORITY 32u
#define RADEON_CS_NUM_BUCKETS (RADEON_CS_MAX_PRIORITY + 1)
/* This is based on the bucket sort with O(n) time complexity.
* An item with priority "i" is added to bucket[i]. The lists are then
* concatenated in descending order.
*/
struct radeon_cs_buckets {
struct list_head bucket[RADEON_CS_NUM_BUCKETS];
};
static void radeon_cs_buckets_init(struct radeon_cs_buckets *b)
{
unsigned i;
for (i = 0; i < RADEON_CS_NUM_BUCKETS; i++)
INIT_LIST_HEAD(&b->bucket[i]);
}
static void radeon_cs_buckets_add(struct radeon_cs_buckets *b,
struct list_head *item, unsigned priority)
{
/* Since buffers which appear sooner in the relocation list are
* likely to be used more often than buffers which appear later
* in the list, the sort mustn't change the ordering of buffers
* with the same priority, i.e. it must be stable.
*/
list_add_tail(item, &b->bucket[min(priority, RADEON_CS_MAX_PRIORITY)]);
}
static void radeon_cs_buckets_get_list(struct radeon_cs_buckets *b,
struct list_head *out_list)
{
unsigned i;
/* Connect the sorted buckets in the output list. */
for (i = 0; i < RADEON_CS_NUM_BUCKETS; i++) {
list_splice(&b->bucket[i], out_list);
}
}
static int radeon_cs_parser_relocs(struct radeon_cs_parser *p)
{
struct radeon_cs_chunk *chunk;
struct radeon_cs_buckets buckets;
unsigned i;
bool need_mmap_lock = false;
int r;
if (p->chunk_relocs == NULL) {
return 0;
}
chunk = p->chunk_relocs;
p->dma_reloc_idx = 0;
/* FIXME: we assume that each relocs use 4 dwords */
p->nrelocs = chunk->length_dw / 4;
p->relocs = kvcalloc(p->nrelocs, sizeof(struct radeon_bo_list),
GFP_KERNEL);
if (p->relocs == NULL) {
return -ENOMEM;
}
radeon_cs_buckets_init(&buckets);
for (i = 0; i < p->nrelocs; i++) {
struct drm_radeon_cs_reloc *r;
struct drm_gem_object *gobj;
unsigned priority;
r = (struct drm_radeon_cs_reloc *)&chunk->kdata[i*4];
gobj = drm_gem_object_lookup(p->filp, r->handle);
if (gobj == NULL) {
DRM_ERROR("gem object lookup failed 0x%x\n",
r->handle);
return -ENOENT;
}
p->relocs[i].robj = gem_to_radeon_bo(gobj);
/* The userspace buffer priorities are from 0 to 15. A higher
* number means the buffer is more important.
* Also, the buffers used for write have a higher priority than
* the buffers used for read only, which doubles the range
* to 0 to 31. 32 is reserved for the kernel driver.
*/
priority = (r->flags & RADEON_RELOC_PRIO_MASK) * 2
+ !!r->write_domain;
/* The first reloc of an UVD job is the msg and that must be in
* VRAM, the second reloc is the DPB and for WMV that must be in
* VRAM as well. Also put everything into VRAM on AGP cards and older
* IGP chips to avoid image corruptions
*/
if (p->ring == R600_RING_TYPE_UVD_INDEX &&
(i <= 0 || pci_find_capability(p->rdev->pdev, PCI_CAP_ID_AGP) ||
p->rdev->family == CHIP_RS780 ||
p->rdev->family == CHIP_RS880)) {
/* TODO: is this still needed for NI+ ? */
p->relocs[i].preferred_domains =
RADEON_GEM_DOMAIN_VRAM;
p->relocs[i].allowed_domains =
RADEON_GEM_DOMAIN_VRAM;
/* prioritize this over any other relocation */
priority = RADEON_CS_MAX_PRIORITY;
} else {
uint32_t domain = r->write_domain ?
r->write_domain : r->read_domains;
if (domain & RADEON_GEM_DOMAIN_CPU) {
DRM_ERROR("RADEON_GEM_DOMAIN_CPU is not valid "
"for command submission\n");
return -EINVAL;
}
p->relocs[i].preferred_domains = domain;
if (domain == RADEON_GEM_DOMAIN_VRAM)
domain |= RADEON_GEM_DOMAIN_GTT;
p->relocs[i].allowed_domains = domain;
}
if (radeon_ttm_tt_has_userptr(p->rdev, p->relocs[i].robj->tbo.ttm)) {
uint32_t domain = p->relocs[i].preferred_domains;
if (!(domain & RADEON_GEM_DOMAIN_GTT)) {
DRM_ERROR("Only RADEON_GEM_DOMAIN_GTT is "
"allowed for userptr BOs\n");
return -EINVAL;
}
need_mmap_lock = true;
domain = RADEON_GEM_DOMAIN_GTT;
p->relocs[i].preferred_domains = domain;
p->relocs[i].allowed_domains = domain;
}
/* Objects shared as dma-bufs cannot be moved to VRAM */
if (p->relocs[i].robj->prime_shared_count) {
p->relocs[i].allowed_domains &= ~RADEON_GEM_DOMAIN_VRAM;
if (!p->relocs[i].allowed_domains) {
DRM_ERROR("BO associated with dma-buf cannot "
"be moved to VRAM\n");
return -EINVAL;
}
}
p->relocs[i].tv.bo = &p->relocs[i].robj->tbo;
p->relocs[i].tv.num_shared = !r->write_domain;
radeon_cs_buckets_add(&buckets, &p->relocs[i].tv.head,
priority);
}
radeon_cs_buckets_get_list(&buckets, &p->validated);
if (p->cs_flags & RADEON_CS_USE_VM)
p->vm_bos = radeon_vm_get_bos(p->rdev, p->ib.vm,
&p->validated);
if (need_mmap_lock)
mmap_read_lock(current->mm);
r = radeon_bo_list_validate(p->rdev, &p->ticket, &p->validated, p->ring);
if (need_mmap_lock)
mmap_read_unlock(current->mm);
return r;
}
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_RV770) {
p->ring = R600_RING_TYPE_DMA_INDEX;
} else {
return -EINVAL;
}
break;
case RADEON_CS_RING_UVD:
p->ring = R600_RING_TYPE_UVD_INDEX;
break;
case RADEON_CS_RING_VCE:
/* TODO: only use the low priority ring for now */
p->ring = TN_RING_TYPE_VCE1_INDEX;
break;
}
return 0;
}
static int radeon_cs_sync_rings(struct radeon_cs_parser *p)
{
struct radeon_bo_list *reloc;
int r;
list_for_each_entry(reloc, &p->validated, tv.head) {
struct dma_resv *resv;
resv = reloc->robj->tbo.base.resv;
r = radeon_sync_resv(p->rdev, &p->ib.sync, resv,
reloc->tv.num_shared);
if (r)
return r;
}
return 0;
}
/* 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;
u64 size;
unsigned i;
u32 ring = RADEON_CS_RING_GFX;
s32 priority = 0;
INIT_LIST_HEAD(&p->validated);
if (!cs->num_chunks) {
return 0;
}
/* get chunks */
p->idx = 0;
p->ib.sa_bo = NULL;
p->const_ib.sa_bo = NULL;
p->chunk_ib = NULL;
p->chunk_relocs = NULL;
p->chunk_flags = NULL;
p->chunk_const_ib = NULL;
p->chunks_array = kvmalloc_array(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 (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 = kvcalloc(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 (copy_from_user(&user_chunk, chunk_ptr,
sizeof(struct drm_radeon_cs_chunk))) {
return -EFAULT;
}
p->chunks[i].length_dw = user_chunk.length_dw;
if (user_chunk.chunk_id == RADEON_CHUNK_ID_RELOCS) {
p->chunk_relocs = &p->chunks[i];
}
if (user_chunk.chunk_id == RADEON_CHUNK_ID_IB) {
p->chunk_ib = &p->chunks[i];
/* zero length IB isn't useful */
if (p->chunks[i].length_dw == 0)
return -EINVAL;
}
if (user_chunk.chunk_id == RADEON_CHUNK_ID_CONST_IB) {
p->chunk_const_ib = &p->chunks[i];
/* zero length CONST IB isn't useful */
if (p->chunks[i].length_dw == 0)
return -EINVAL;
}
if (user_chunk.chunk_id == RADEON_CHUNK_ID_FLAGS) {
p->chunk_flags = &p->chunks[i];
/* zero length flags aren't useful */
if (p->chunks[i].length_dw == 0)
return -EINVAL;
}
size = p->chunks[i].length_dw;
cdata = (void __user *)(unsigned long)user_chunk.chunk_data;
p->chunks[i].user_ptr = cdata;
if (user_chunk.chunk_id == RADEON_CHUNK_ID_CONST_IB)
continue;
if (user_chunk.chunk_id == RADEON_CHUNK_ID_IB) {
if (!p->rdev || !(p->rdev->flags & RADEON_IS_AGP))
continue;
}
p->chunks[i].kdata = kvmalloc_array(size, sizeof(uint32_t), GFP_KERNEL);
size *= sizeof(uint32_t);
if (p->chunks[i].kdata == NULL) {
return -ENOMEM;
}
if (copy_from_user(p->chunks[i].kdata, cdata, size)) {
return -EFAULT;
}
if (user_chunk.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->cs_flags & RADEON_CS_USE_VM) == 0) {
if (p->rdev->asic->ring[p->ring]->cs_parse == NULL) {
DRM_ERROR("Ring %d requires VM!\n", p->ring);
return -EINVAL;
}
} else {
if (p->rdev->asic->ring[p->ring]->ib_parse == NULL) {
DRM_ERROR("VM not supported on ring %d!\n",
p->ring);
return -EINVAL;
}
}
}
return 0;
}
static int cmp_size_smaller_first(void *priv, const struct list_head *a,
const struct list_head *b)
{
struct radeon_bo_list *la = list_entry(a, struct radeon_bo_list, tv.head);
struct radeon_bo_list *lb = list_entry(b, struct radeon_bo_list, tv.head);
/* Sort A before B if A is smaller. */
if (la->robj->tbo.base.size > lb->robj->tbo.base.size)
return 1;
if (la->robj->tbo.base.size < lb->robj->tbo.base.size)
return -1;
return 0;
}
/**
* radeon_cs_parser_fini() - clean parser states
* @parser: parser structure holding parsing context.
* @error: error number
* @backoff: indicator to backoff the reservation
*
* 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) {
/* Sort the buffer list from the smallest to largest buffer,
* which affects the order of buffers in the LRU list.
* This assures that the smallest buffers are added first
* to the LRU list, so they are likely to be later evicted
* first, instead of large buffers whose eviction is more
* expensive.
*
* This slightly lowers the number of bytes moved by TTM
* per frame under memory pressure.
*/
list_sort(NULL, &parser->validated, cmp_size_smaller_first);
ttm_eu_fence_buffer_objects(&parser->ticket,
&parser->validated,
&parser->ib.fence->base);
} else if (backoff) {
ttm_eu_backoff_reservation(&parser->ticket,
&parser->validated);
}
if (parser->relocs != NULL) {
for (i = 0; i < parser->nrelocs; i++) {
struct radeon_bo *bo = parser->relocs[i].robj;
if (bo == NULL)
continue;
drm_gem_object_put(&bo->tbo.base);
}
}
kfree(parser->track);
kvfree(parser->relocs);
kvfree(parser->vm_bos);
for (i = 0; i < parser->nchunks; i++)
kvfree(parser->chunks[i].kdata);
kvfree(parser->chunks);
kvfree(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)
{
int r;
if (parser->chunk_ib == NULL)
return 0;
if (parser->cs_flags & RADEON_CS_USE_VM)
return 0;
r = radeon_cs_parse(rdev, parser->ring, parser);
if (r || parser->parser_error) {
DRM_ERROR("Invalid command stream !\n");
return r;
}
r = radeon_cs_sync_rings(parser);
if (r) {
if (r != -ERESTARTSYS)
DRM_ERROR("Failed to sync rings: %i\n", r);
return r;
}
if (parser->ring == R600_RING_TYPE_UVD_INDEX)
radeon_uvd_note_usage(rdev);
else if ((parser->ring == TN_RING_TYPE_VCE1_INDEX) ||
(parser->ring == TN_RING_TYPE_VCE2_INDEX))
radeon_vce_note_usage(rdev);
r = radeon_ib_schedule(rdev, &parser->ib, NULL, true);
if (r) {
DRM_ERROR("Failed to schedule IB !\n");
}
return r;
}
static int radeon_bo_vm_update_pte(struct radeon_cs_parser *p,
struct radeon_vm *vm)
{
struct radeon_device *rdev = p->rdev;
struct radeon_bo_va *bo_va;
int i, r;
r = radeon_vm_update_page_directory(rdev, vm);
if (r)
return r;
r = radeon_vm_clear_freed(rdev, vm);
if (r)
return r;
if (vm->ib_bo_va == NULL) {
DRM_ERROR("Tmp BO not in VM!\n");
return -EINVAL;
}
r = radeon_vm_bo_update(rdev, vm->ib_bo_va,
rdev->ring_tmp_bo.bo->tbo.resource);
if (r)
return r;
for (i = 0; i < p->nrelocs; i++) {
struct radeon_bo *bo;
bo = p->relocs[i].robj;
bo_va = radeon_vm_bo_find(vm, bo);
if (bo_va == NULL) {
dev_err(rdev->dev, "bo %p not in vm %p\n", bo, vm);
return -EINVAL;
}
r = radeon_vm_bo_update(rdev, bo_va, bo->tbo.resource);
if (r)
return r;
radeon_sync_fence(&p->ib.sync, bo_va->last_pt_update);
r = dma_resv_reserve_fences(bo->tbo.base.resv, 1);
if (r)
return r;
}
return radeon_vm_clear_invalids(rdev, vm);
}
static int radeon_cs_ib_vm_chunk(struct radeon_device *rdev,
struct radeon_cs_parser *parser)
{
struct radeon_fpriv *fpriv = parser->filp->driver_priv;
struct radeon_vm *vm = &fpriv->vm;
int r;
if (parser->chunk_ib == NULL)
return 0;
if ((parser->cs_flags & RADEON_CS_USE_VM) == 0)
return 0;
if (parser->const_ib.length_dw) {
r = radeon_ring_ib_parse(rdev, parser->ring, &parser->const_ib);
if (r) {
return r;
}
}
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(&vm->mutex);
r = radeon_bo_vm_update_pte(parser, vm);
if (r) {
goto out;
}
r = radeon_cs_sync_rings(parser);
if (r) {
if (r != -ERESTARTSYS)
DRM_ERROR("Failed to sync rings: %i\n", r);
goto out;
}
if ((rdev->family >= CHIP_TAHITI) &&
(parser->chunk_const_ib != NULL)) {
r = radeon_ib_schedule(rdev, &parser->ib, &parser->const_ib, true);
} else {
r = radeon_ib_schedule(rdev, &parser->ib, NULL, true);
}
out:
mutex_unlock(&vm->mutex);
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;
}
static int radeon_cs_ib_fill(struct radeon_device *rdev, struct radeon_cs_parser *parser)
{
struct radeon_cs_chunk *ib_chunk;
struct radeon_vm *vm = NULL;
int r;
if (parser->chunk_ib == NULL)
return 0;
if (parser->cs_flags & RADEON_CS_USE_VM) {
struct radeon_fpriv *fpriv = parser->filp->driver_priv;
vm = &fpriv->vm;
if ((rdev->family >= CHIP_TAHITI) &&
(parser->chunk_const_ib != NULL)) {
ib_chunk = parser->chunk_const_ib;
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;
if (copy_from_user(parser->const_ib.ptr,
ib_chunk->user_ptr,
ib_chunk->length_dw * 4))
return -EFAULT;
}
ib_chunk = parser->chunk_ib;
if (ib_chunk->length_dw > RADEON_IB_VM_MAX_SIZE) {
DRM_ERROR("cs IB too big: %d\n", ib_chunk->length_dw);
return -EINVAL;
}
}
ib_chunk = parser->chunk_ib;
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;
if (ib_chunk->kdata)
memcpy(parser->ib.ptr, ib_chunk->kdata, ib_chunk->length_dw * 4);
else if (copy_from_user(parser->ib.ptr, ib_chunk->user_ptr, ib_chunk->length_dw * 4))
return -EFAULT;
return 0;
}
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;
}
if (rdev->in_reset) {
up_read(&rdev->exclusive_lock);
r = radeon_gpu_reset(rdev);
if (!r)
r = -EAGAIN;
return r;
}
/* 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_ib_fill(rdev, &parser);
if (!r) {
r = radeon_cs_parser_relocs(&parser);
if (r && r != -ERESTARTSYS)
DRM_ERROR("Failed to parse relocation %d!\n", r);
}
if (r) {
radeon_cs_parser_fini(&parser, r, false);
up_read(&rdev->exclusive_lock);
r = radeon_cs_handle_lockup(rdev, r);
return r;
}
trace_radeon_cs(&parser);
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;
}
/**
* radeon_cs_packet_parse() - parse cp packet and point ib index to next packet
* @p: parser structure holding parsing context.
* @pkt: where to store packet information
* @idx: packet index
*
* 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->chunk_ib;
struct radeon_device *rdev = p->rdev;
uint32_t header;
int ret = 0, i;
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);
ret = -EINVAL;
goto dump_ib;
}
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);
ret = -EINVAL;
goto dump_ib;
}
return 0;
dump_ib:
for (i = 0; i < ib_chunk->length_dw; i++) {
if (i == idx)
printk("\t0x%08x <---\n", radeon_get_ib_value(p, i));
else
printk("\t0x%08x\n", radeon_get_ib_value(p, i));
}
return ret;
}
/**
* 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
* @p: parser structure holding parsing context.
* @cs_reloc: reloc informations
* @nomm: no memory management for debugging
*
* 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_bo_list **cs_reloc,
int nomm)
{
struct radeon_cs_chunk *relocs_chunk;
struct radeon_cs_packet p3reloc;
unsigned idx;
int r;
if (p->chunk_relocs == NULL) {
DRM_ERROR("No relocation chunk !\n");
return -EINVAL;
}
*cs_reloc = NULL;
relocs_chunk = p->chunk_relocs;
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)->gpu_offset =
(u64)relocs_chunk->kdata[idx + 3] << 32;
(*cs_reloc)->gpu_offset |= relocs_chunk->kdata[idx + 0];
} else
*cs_reloc = &p->relocs[(idx / 4)];
return 0;
}
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