[AMD Official Use Only - Internal Distribution Only]

Reviewed-by: Sonny Jiang sonny.jiang@amd.com ________________________________ From: Christian König ckoenig.leichtzumerken@gmail.com Sent: Friday, March 5, 2021 7:51 AM To: dri-devel@lists.freedesktop.org dri-devel@lists.freedesktop.org; amd-gfx@lists.freedesktop.org amd-gfx@lists.freedesktop.org Cc: Liu, Leo Leo.Liu@amd.com; Jiang, Sonny Sonny.Jiang@amd.com Subject: [PATCH 2/2] drm/amdgpu: load balance VCN3 decode as well v8

Add VCN3 IB parsing to figure out to which instance we can send the stream for decode.

v2: remove VCN instance limit as well, fix amdgpu_cs_find_mapping, check supported formats instead of unsupported. v3: fix typo and error handling v4: make sure the message BO is CPU accessible v5: fix addr calculation once more v6: only check message buffers v7: fix constant and use defines v8: fix create msg calculation

Signed-off-by: Christian König christian.koenig@amd.com --- drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c | 132 +++++++++++++++++++++++++- 1 file changed, 130 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c index b33f513fd2ac..77932003b4c1 100644 --- a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c +++ b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c @@ -50,6 +50,9 @@ #define VCN_INSTANCES_SIENNA_CICHLID 2 #define DEC_SW_RING_ENABLED FALSE

+#define RDECODE_MSG_CREATE 0x00000000 +#define RDECODE_MESSAGE_CREATE 0x00000001 + static int amdgpu_ih_clientid_vcns[] = { SOC15_IH_CLIENTID_VCN, SOC15_IH_CLIENTID_VCN1 @@ -208,8 +211,6 @@ static int vcn_v3_0_sw_init(void *handle) } else { ring->doorbell_index = (adev->doorbell_index.vcn.vcn_ring0_1 << 1) + 8 * i; } - if (adev->asic_type == CHIP_SIENNA_CICHLID && i != 0) - ring->no_scheduler = true; sprintf(ring->name, "vcn_dec_%d", i); r = amdgpu_ring_init(adev, ring, 512, &adev->vcn.inst[i].irq, 0, AMDGPU_RING_PRIO_DEFAULT, @@ -1825,6 +1826,132 @@ static const struct amdgpu_ring_funcs vcn_v3_0_dec_sw_ring_vm_funcs = { .emit_reg_write_reg_wait = amdgpu_ring_emit_reg_write_reg_wait_helper, };

+static int vcn_v3_0_limit_sched(struct amdgpu_cs_parser *p) +{ + struct drm_gpu_scheduler **scheds; + + /* The create msg must be in the first IB submitted */ + if (atomic_read(&p->entity->fence_seq)) + return -EINVAL; + + scheds = p->adev->gpu_sched[AMDGPU_HW_IP_VCN_DEC] + [AMDGPU_RING_PRIO_DEFAULT].sched; + drm_sched_entity_modify_sched(p->entity, scheds, 1); + return 0; +} + +static int vcn_v3_0_dec_msg(struct amdgpu_cs_parser *p, uint64_t addr) +{ + struct ttm_operation_ctx ctx = { false, false }; + struct amdgpu_bo_va_mapping *map; + uint32_t *msg, num_buffers; + struct amdgpu_bo *bo; + uint64_t start, end; + unsigned int i; + void * ptr; + int r; + + addr &= AMDGPU_GMC_HOLE_MASK; + r = amdgpu_cs_find_mapping(p, addr, &bo, &map); + if (r) { + DRM_ERROR("Can't find BO for addr 0x%08Lx\n", addr); + return r; + } + + start = map->start * AMDGPU_GPU_PAGE_SIZE; + end = (map->last + 1) * AMDGPU_GPU_PAGE_SIZE; + if (addr & 0x7) { + DRM_ERROR("VCN messages must be 8 byte aligned!\n"); + return -EINVAL; + } + + bo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED; + amdgpu_bo_placement_from_domain(bo, bo->allowed_domains); + r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); + if (r) { + DRM_ERROR("Failed validating the VCN message BO (%d)!\n", r); + return r; + } + + r = amdgpu_bo_kmap(bo, &ptr); + if (r) { + DRM_ERROR("Failed mapping the VCN message (%d)!\n", r); + return r; + } + + msg = ptr + addr - start; + + /* Check length */ + if (msg[1] > end - addr) { + r = -EINVAL; + goto out; + } + + if (msg[3] != RDECODE_MSG_CREATE) + goto out; + + num_buffers = msg[2]; + for (i = 0, msg = &msg[6]; i < num_buffers; ++i, msg += 4) { + uint32_t offset, size, *create; + + if (msg[0] != RDECODE_MESSAGE_CREATE) + continue; + + offset = msg[1]; + size = msg[2]; + + if (offset + size > end) { + r = -EINVAL; + goto out; + } + + create = ptr + addr + offset - start; + + /* H246, HEVC and VP9 can run on any instance */ + if (create[0] == 0x7 || create[0] == 0x10 || create[0] == 0x11) + continue; + + r = vcn_v3_0_limit_sched(p); + if (r) + goto out; + } + +out: + amdgpu_bo_kunmap(bo); + return r; +} + +static int vcn_v3_0_ring_patch_cs_in_place(struct amdgpu_cs_parser *p, + uint32_t ib_idx) +{ + struct amdgpu_ring *ring = to_amdgpu_ring(p->entity->rq->sched); + struct amdgpu_ib *ib = &p->job->ibs[ib_idx]; + uint32_t msg_lo = 0, msg_hi = 0; + unsigned i; + int r; + + /* The first instance can decode anything */ + if (!ring->me) + return 0; + + for (i = 0; i < ib->length_dw; i += 2) { + uint32_t reg = amdgpu_get_ib_value(p, ib_idx, i); + uint32_t val = amdgpu_get_ib_value(p, ib_idx, i + 1); + + if (reg == PACKET0(p->adev->vcn.internal.data0, 0)) { + msg_lo = val; + } else if (reg == PACKET0(p->adev->vcn.internal.data1, 0)) { + msg_hi = val; + } else if (reg == PACKET0(p->adev->vcn.internal.cmd, 0) && + val == 0) { + r = vcn_v3_0_dec_msg(p, ((u64)msg_hi) << 32 | msg_lo); + if (r) + return r; + } + } + return 0; +} + static const struct amdgpu_ring_funcs vcn_v3_0_dec_ring_vm_funcs = { .type = AMDGPU_RING_TYPE_VCN_DEC, .align_mask = 0xf, @@ -1832,6 +1959,7 @@ static const struct amdgpu_ring_funcs vcn_v3_0_dec_ring_vm_funcs = { .get_rptr = vcn_v3_0_dec_ring_get_rptr, .get_wptr = vcn_v3_0_dec_ring_get_wptr, .set_wptr = vcn_v3_0_dec_ring_set_wptr, + .patch_cs_in_place = vcn_v3_0_ring_patch_cs_in_place, .emit_frame_size = SOC15_FLUSH_GPU_TLB_NUM_WREG * 6 + SOC15_FLUSH_GPU_TLB_NUM_REG_WAIT * 8 + -- 2.25.1