/* * 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 */ #include #include #include #include #include #include #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 = kvmalloc_array(p->nrelocs, sizeof(struct radeon_bo_list), GFP_KERNEL | __GFP_ZERO); 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 || (p->rdev->flags & RADEON_IS_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); #ifdef notyet if (need_mmap_lock) mmap_read_lock(current->mm); #endif r = radeon_bo_list_validate(p->rdev, &p->ticket, &p->validated, p->ring); #ifdef notyet if (need_mmap_lock) mmap_read_unlock(current->mm); #endif 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; unsigned size, 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 = 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 (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 (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. */ return (int)la->robj->tbo.num_pages - (int)lb->robj->tbo.num_pages; } /** * 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) { /* 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); 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) { 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.mem); 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.mem); if (r) return r; radeon_sync_fence(&p->ib.sync, bo_va->last_pt_update); } 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 * @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->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 * @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_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; }