// SPDX-License-Identifier: GPL-2.0+ /* Copyright (C) 2014-2018 Broadcom */ #include #include #include #include #include #include #include #include #include #include "uapi/drm/v3d_drm.h" #include "v3d_drv.h" #include "v3d_regs.h" #include "v3d_trace.h" static void v3d_init_core(struct v3d_dev *v3d, int core) { /* Set OVRTMUOUT, which means that the texture sampler uniform * configuration's tmu output type field is used, instead of * using the hardware default behavior based on the texture * type. If you want the default behavior, you can still put * "2" in the indirect texture state's output_type field. */ if (v3d->ver < 40) V3D_CORE_WRITE(core, V3D_CTL_MISCCFG, V3D_MISCCFG_OVRTMUOUT); /* Whenever we flush the L2T cache, we always want to flush * the whole thing. */ V3D_CORE_WRITE(core, V3D_CTL_L2TFLSTA, 0); V3D_CORE_WRITE(core, V3D_CTL_L2TFLEND, ~0); } /* Sets invariant state for the HW. */ static void v3d_init_hw_state(struct v3d_dev *v3d) { v3d_init_core(v3d, 0); } static void v3d_idle_axi(struct v3d_dev *v3d, int core) { V3D_CORE_WRITE(core, V3D_GMP_CFG, V3D_GMP_CFG_STOP_REQ); if (wait_for((V3D_CORE_READ(core, V3D_GMP_STATUS) & (V3D_GMP_STATUS_RD_COUNT_MASK | V3D_GMP_STATUS_WR_COUNT_MASK | V3D_GMP_STATUS_CFG_BUSY)) == 0, 100)) { DRM_ERROR("Failed to wait for safe GMP shutdown\n"); } } static void v3d_idle_gca(struct v3d_dev *v3d) { if (v3d->ver >= 41) return; V3D_GCA_WRITE(V3D_GCA_SAFE_SHUTDOWN, V3D_GCA_SAFE_SHUTDOWN_EN); if (wait_for((V3D_GCA_READ(V3D_GCA_SAFE_SHUTDOWN_ACK) & V3D_GCA_SAFE_SHUTDOWN_ACK_ACKED) == V3D_GCA_SAFE_SHUTDOWN_ACK_ACKED, 100)) { DRM_ERROR("Failed to wait for safe GCA shutdown\n"); } } static void v3d_reset_by_bridge(struct v3d_dev *v3d) { int version = V3D_BRIDGE_READ(V3D_TOP_GR_BRIDGE_REVISION); if (V3D_GET_FIELD(version, V3D_TOP_GR_BRIDGE_MAJOR) == 2) { V3D_BRIDGE_WRITE(V3D_TOP_GR_BRIDGE_SW_INIT_0, V3D_TOP_GR_BRIDGE_SW_INIT_0_V3D_CLK_108_SW_INIT); V3D_BRIDGE_WRITE(V3D_TOP_GR_BRIDGE_SW_INIT_0, 0); /* GFXH-1383: The SW_INIT may cause a stray write to address 0 * of the unit, so reset it to its power-on value here. */ V3D_WRITE(V3D_HUB_AXICFG, V3D_HUB_AXICFG_MAX_LEN_MASK); } else { WARN_ON_ONCE(V3D_GET_FIELD(version, V3D_TOP_GR_BRIDGE_MAJOR) != 7); V3D_BRIDGE_WRITE(V3D_TOP_GR_BRIDGE_SW_INIT_1, V3D_TOP_GR_BRIDGE_SW_INIT_1_V3D_CLK_108_SW_INIT); V3D_BRIDGE_WRITE(V3D_TOP_GR_BRIDGE_SW_INIT_1, 0); } } static void v3d_reset_v3d(struct v3d_dev *v3d) { if (v3d->reset) reset_control_reset(v3d->reset); else v3d_reset_by_bridge(v3d); v3d_init_hw_state(v3d); } void v3d_reset(struct v3d_dev *v3d) { struct drm_device *dev = &v3d->drm; DRM_ERROR("Resetting GPU.\n"); trace_v3d_reset_begin(dev); /* XXX: only needed for safe powerdown, not reset. */ if (false) v3d_idle_axi(v3d, 0); v3d_idle_gca(v3d); v3d_reset_v3d(v3d); v3d_mmu_set_page_table(v3d); v3d_irq_reset(v3d); trace_v3d_reset_end(dev); } static void v3d_flush_l3(struct v3d_dev *v3d) { if (v3d->ver < 41) { u32 gca_ctrl = V3D_GCA_READ(V3D_GCA_CACHE_CTRL); V3D_GCA_WRITE(V3D_GCA_CACHE_CTRL, gca_ctrl | V3D_GCA_CACHE_CTRL_FLUSH); if (v3d->ver < 33) { V3D_GCA_WRITE(V3D_GCA_CACHE_CTRL, gca_ctrl & ~V3D_GCA_CACHE_CTRL_FLUSH); } } } /* Invalidates the (read-only) L2C cache. This was the L2 cache for * uniforms and instructions on V3D 3.2. */ static void v3d_invalidate_l2c(struct v3d_dev *v3d, int core) { if (v3d->ver > 32) return; V3D_CORE_WRITE(core, V3D_CTL_L2CACTL, V3D_L2CACTL_L2CCLR | V3D_L2CACTL_L2CENA); } /* Invalidates texture L2 cachelines */ static void v3d_flush_l2t(struct v3d_dev *v3d, int core) { /* While there is a busy bit (V3D_L2TCACTL_L2TFLS), we don't * need to wait for completion before dispatching the job -- * L2T accesses will be stalled until the flush has completed. */ V3D_CORE_WRITE(core, V3D_CTL_L2TCACTL, V3D_L2TCACTL_L2TFLS | V3D_SET_FIELD(V3D_L2TCACTL_FLM_FLUSH, V3D_L2TCACTL_FLM)); } /* Invalidates the slice caches. These are read-only caches. */ static void v3d_invalidate_slices(struct v3d_dev *v3d, int core) { V3D_CORE_WRITE(core, V3D_CTL_SLCACTL, V3D_SET_FIELD(0xf, V3D_SLCACTL_TVCCS) | V3D_SET_FIELD(0xf, V3D_SLCACTL_TDCCS) | V3D_SET_FIELD(0xf, V3D_SLCACTL_UCC) | V3D_SET_FIELD(0xf, V3D_SLCACTL_ICC)); } void v3d_invalidate_caches(struct v3d_dev *v3d) { /* Invalidate the caches from the outside in. That way if * another CL's concurrent use of nearby memory were to pull * an invalidated cacheline back in, we wouldn't leave stale * data in the inner cache. */ v3d_flush_l3(v3d); v3d_invalidate_l2c(v3d, 0); v3d_flush_l2t(v3d, 0); v3d_invalidate_slices(v3d, 0); } static void v3d_attach_object_fences(struct drm_gem_object **bos, int bo_count, struct dma_fence *fence) { int i; for (i = 0; i < bo_count; i++) { /* XXX: Use shared fences for read-only objects. */ reservation_object_add_excl_fence(bos[i]->resv, fence); } } /* Takes the reservation lock on all the BOs being referenced, so that * at queue submit time we can update the reservations. * * We don't lock the RCL the tile alloc/state BOs, or overflow memory * (all of which are on exec->unref_list). They're entirely private * to v3d, so we don't attach dma-buf fences to them. */ static int v3d_lock_bo_reservations(struct drm_gem_object **bos, int bo_count, struct ww_acquire_ctx *acquire_ctx) { int i, ret; ret = drm_gem_lock_reservations(bos, bo_count, acquire_ctx); if (ret) return ret; /* Reserve space for our shared (read-only) fence references, * before we commit the CL to the hardware. */ for (i = 0; i < bo_count; i++) { ret = reservation_object_reserve_shared(bos[i]->resv, 1); if (ret) { drm_gem_unlock_reservations(bos, bo_count, acquire_ctx); return ret; } } return 0; } /** * v3d_cl_lookup_bos() - Sets up exec->bo[] with the GEM objects * referenced by the job. * @dev: DRM device * @file_priv: DRM file for this fd * @exec: V3D job being set up * * The command validator needs to reference BOs by their index within * the submitted job's BO list. This does the validation of the job's * BO list and reference counting for the lifetime of the job. * * Note that this function doesn't need to unreference the BOs on * failure, because that will happen at v3d_exec_cleanup() time. */ static int v3d_cl_lookup_bos(struct drm_device *dev, struct drm_file *file_priv, struct drm_v3d_submit_cl *args, struct v3d_exec_info *exec) { u32 *handles; int ret = 0; int i; exec->bo_count = args->bo_handle_count; if (!exec->bo_count) { /* See comment on bo_index for why we have to check * this. */ DRM_DEBUG("Rendering requires BOs\n"); return -EINVAL; } exec->bo = kvmalloc_array(exec->bo_count, sizeof(struct drm_gem_cma_object *), GFP_KERNEL | __GFP_ZERO); if (!exec->bo) { DRM_DEBUG("Failed to allocate validated BO pointers\n"); return -ENOMEM; } handles = kvmalloc_array(exec->bo_count, sizeof(u32), GFP_KERNEL); if (!handles) { ret = -ENOMEM; DRM_DEBUG("Failed to allocate incoming GEM handles\n"); goto fail; } if (copy_from_user(handles, (void __user *)(uintptr_t)args->bo_handles, exec->bo_count * sizeof(u32))) { ret = -EFAULT; DRM_DEBUG("Failed to copy in GEM handles\n"); goto fail; } spin_lock(&file_priv->table_lock); for (i = 0; i < exec->bo_count; i++) { struct drm_gem_object *bo = idr_find(&file_priv->object_idr, handles[i]); if (!bo) { DRM_DEBUG("Failed to look up GEM BO %d: %d\n", i, handles[i]); ret = -ENOENT; spin_unlock(&file_priv->table_lock); goto fail; } drm_gem_object_get(bo); exec->bo[i] = bo; } spin_unlock(&file_priv->table_lock); fail: kvfree(handles); return ret; } static void v3d_exec_cleanup(struct kref *ref) { struct v3d_exec_info *exec = container_of(ref, struct v3d_exec_info, refcount); struct v3d_dev *v3d = exec->v3d; unsigned int i; struct v3d_bo *bo, *save; dma_fence_put(exec->bin.in_fence); dma_fence_put(exec->render.in_fence); dma_fence_put(exec->bin.irq_fence); dma_fence_put(exec->render.irq_fence); dma_fence_put(exec->bin_done_fence); dma_fence_put(exec->render_done_fence); for (i = 0; i < exec->bo_count; i++) drm_gem_object_put_unlocked(exec->bo[i]); kvfree(exec->bo); list_for_each_entry_safe(bo, save, &exec->unref_list, unref_head) { drm_gem_object_put_unlocked(&bo->base.base); } pm_runtime_mark_last_busy(v3d->dev); pm_runtime_put_autosuspend(v3d->dev); kfree(exec); } void v3d_exec_put(struct v3d_exec_info *exec) { kref_put(&exec->refcount, v3d_exec_cleanup); } static void v3d_tfu_job_cleanup(struct kref *ref) { struct v3d_tfu_job *job = container_of(ref, struct v3d_tfu_job, refcount); struct v3d_dev *v3d = job->v3d; unsigned int i; dma_fence_put(job->in_fence); dma_fence_put(job->irq_fence); for (i = 0; i < ARRAY_SIZE(job->bo); i++) { if (job->bo[i]) drm_gem_object_put_unlocked(job->bo[i]); } pm_runtime_mark_last_busy(v3d->dev); pm_runtime_put_autosuspend(v3d->dev); kfree(job); } void v3d_tfu_job_put(struct v3d_tfu_job *job) { kref_put(&job->refcount, v3d_tfu_job_cleanup); } int v3d_wait_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { int ret; struct drm_v3d_wait_bo *args = data; ktime_t start = ktime_get(); u64 delta_ns; unsigned long timeout_jiffies = nsecs_to_jiffies_timeout(args->timeout_ns); if (args->pad != 0) return -EINVAL; ret = drm_gem_reservation_object_wait(file_priv, args->handle, true, timeout_jiffies); /* Decrement the user's timeout, in case we got interrupted * such that the ioctl will be restarted. */ delta_ns = ktime_to_ns(ktime_sub(ktime_get(), start)); if (delta_ns < args->timeout_ns) args->timeout_ns -= delta_ns; else args->timeout_ns = 0; /* Asked to wait beyond the jiffie/scheduler precision? */ if (ret == -ETIME && args->timeout_ns) ret = -EAGAIN; return ret; } /** * v3d_submit_cl_ioctl() - Submits a job (frame) to the V3D. * @dev: DRM device * @data: ioctl argument * @file_priv: DRM file for this fd * * This is the main entrypoint for userspace to submit a 3D frame to * the GPU. Userspace provides the binner command list (if * applicable), and the kernel sets up the render command list to draw * to the framebuffer described in the ioctl, using the command lists * that the 3D engine's binner will produce. */ int v3d_submit_cl_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct v3d_dev *v3d = to_v3d_dev(dev); struct v3d_file_priv *v3d_priv = file_priv->driver_priv; struct drm_v3d_submit_cl *args = data; struct v3d_exec_info *exec; struct ww_acquire_ctx acquire_ctx; struct drm_syncobj *sync_out; int ret = 0; trace_v3d_submit_cl_ioctl(&v3d->drm, args->rcl_start, args->rcl_end); if (args->pad != 0) { DRM_INFO("pad must be zero: %d\n", args->pad); return -EINVAL; } exec = kcalloc(1, sizeof(*exec), GFP_KERNEL); if (!exec) return -ENOMEM; ret = pm_runtime_get_sync(v3d->dev); if (ret < 0) { kfree(exec); return ret; } kref_init(&exec->refcount); ret = drm_syncobj_find_fence(file_priv, args->in_sync_bcl, 0, 0, &exec->bin.in_fence); if (ret == -EINVAL) goto fail; ret = drm_syncobj_find_fence(file_priv, args->in_sync_rcl, 0, 0, &exec->render.in_fence); if (ret == -EINVAL) goto fail; exec->qma = args->qma; exec->qms = args->qms; exec->qts = args->qts; exec->bin.exec = exec; exec->bin.start = args->bcl_start; exec->bin.end = args->bcl_end; exec->render.exec = exec; exec->render.start = args->rcl_start; exec->render.end = args->rcl_end; exec->v3d = v3d; INIT_LIST_HEAD(&exec->unref_list); ret = v3d_cl_lookup_bos(dev, file_priv, args, exec); if (ret) goto fail; ret = v3d_lock_bo_reservations(exec->bo, exec->bo_count, &acquire_ctx); if (ret) goto fail; mutex_lock(&v3d->sched_lock); if (exec->bin.start != exec->bin.end) { ret = drm_sched_job_init(&exec->bin.base, &v3d_priv->sched_entity[V3D_BIN], v3d_priv); if (ret) goto fail_unreserve; exec->bin_done_fence = dma_fence_get(&exec->bin.base.s_fence->finished); kref_get(&exec->refcount); /* put by scheduler job completion */ drm_sched_entity_push_job(&exec->bin.base, &v3d_priv->sched_entity[V3D_BIN]); } ret = drm_sched_job_init(&exec->render.base, &v3d_priv->sched_entity[V3D_RENDER], v3d_priv); if (ret) goto fail_unreserve; exec->render_done_fence = dma_fence_get(&exec->render.base.s_fence->finished); kref_get(&exec->refcount); /* put by scheduler job completion */ drm_sched_entity_push_job(&exec->render.base, &v3d_priv->sched_entity[V3D_RENDER]); mutex_unlock(&v3d->sched_lock); v3d_attach_object_fences(exec->bo, exec->bo_count, exec->render_done_fence); drm_gem_unlock_reservations(exec->bo, exec->bo_count, &acquire_ctx); /* Update the return sync object for the */ sync_out = drm_syncobj_find(file_priv, args->out_sync); if (sync_out) { drm_syncobj_replace_fence(sync_out, exec->render_done_fence); drm_syncobj_put(sync_out); } v3d_exec_put(exec); return 0; fail_unreserve: mutex_unlock(&v3d->sched_lock); drm_gem_unlock_reservations(exec->bo, exec->bo_count, &acquire_ctx); fail: v3d_exec_put(exec); return ret; } /** * v3d_submit_tfu_ioctl() - Submits a TFU (texture formatting) job to the V3D. * @dev: DRM device * @data: ioctl argument * @file_priv: DRM file for this fd * * Userspace provides the register setup for the TFU, which we don't * need to validate since the TFU is behind the MMU. */ int v3d_submit_tfu_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct v3d_dev *v3d = to_v3d_dev(dev); struct v3d_file_priv *v3d_priv = file_priv->driver_priv; struct drm_v3d_submit_tfu *args = data; struct v3d_tfu_job *job; struct ww_acquire_ctx acquire_ctx; struct drm_syncobj *sync_out; struct dma_fence *sched_done_fence; int ret = 0; int bo_count; trace_v3d_submit_tfu_ioctl(&v3d->drm, args->iia); job = kcalloc(1, sizeof(*job), GFP_KERNEL); if (!job) return -ENOMEM; ret = pm_runtime_get_sync(v3d->dev); if (ret < 0) { kfree(job); return ret; } kref_init(&job->refcount); ret = drm_syncobj_find_fence(file_priv, args->in_sync, 0, 0, &job->in_fence); if (ret == -EINVAL) goto fail; job->args = *args; job->v3d = v3d; spin_lock(&file_priv->table_lock); for (bo_count = 0; bo_count < ARRAY_SIZE(job->bo); bo_count++) { struct drm_gem_object *bo; if (!args->bo_handles[bo_count]) break; bo = idr_find(&file_priv->object_idr, args->bo_handles[bo_count]); if (!bo) { DRM_DEBUG("Failed to look up GEM BO %d: %d\n", bo_count, args->bo_handles[bo_count]); ret = -ENOENT; spin_unlock(&file_priv->table_lock); goto fail; } drm_gem_object_get(bo); job->bo[bo_count] = bo; } spin_unlock(&file_priv->table_lock); ret = v3d_lock_bo_reservations(job->bo, bo_count, &acquire_ctx); if (ret) goto fail; mutex_lock(&v3d->sched_lock); ret = drm_sched_job_init(&job->base, &v3d_priv->sched_entity[V3D_TFU], v3d_priv); if (ret) goto fail_unreserve; sched_done_fence = dma_fence_get(&job->base.s_fence->finished); kref_get(&job->refcount); /* put by scheduler job completion */ drm_sched_entity_push_job(&job->base, &v3d_priv->sched_entity[V3D_TFU]); mutex_unlock(&v3d->sched_lock); v3d_attach_object_fences(job->bo, bo_count, sched_done_fence); drm_gem_unlock_reservations(job->bo, bo_count, &acquire_ctx); /* Update the return sync object */ sync_out = drm_syncobj_find(file_priv, args->out_sync); if (sync_out) { drm_syncobj_replace_fence(sync_out, sched_done_fence); drm_syncobj_put(sync_out); } dma_fence_put(sched_done_fence); v3d_tfu_job_put(job); return 0; fail_unreserve: mutex_unlock(&v3d->sched_lock); drm_gem_unlock_reservations(job->bo, bo_count, &acquire_ctx); fail: v3d_tfu_job_put(job); return ret; } int v3d_gem_init(struct drm_device *dev) { struct v3d_dev *v3d = to_v3d_dev(dev); u32 pt_size = 4096 * 1024; int ret, i; for (i = 0; i < V3D_MAX_QUEUES; i++) v3d->queue[i].fence_context = dma_fence_context_alloc(1); spin_lock_init(&v3d->mm_lock); spin_lock_init(&v3d->job_lock); mutex_init(&v3d->bo_lock); mutex_init(&v3d->reset_lock); mutex_init(&v3d->sched_lock); /* Note: We don't allocate address 0. Various bits of HW * treat 0 as special, such as the occlusion query counters * where 0 means "disabled". */ drm_mm_init(&v3d->mm, 1, pt_size / sizeof(u32) - 1); v3d->pt = dma_alloc_wc(v3d->dev, pt_size, &v3d->pt_paddr, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO); if (!v3d->pt) { drm_mm_takedown(&v3d->mm); dev_err(v3d->dev, "Failed to allocate page tables. " "Please ensure you have CMA enabled.\n"); return -ENOMEM; } v3d_init_hw_state(v3d); v3d_mmu_set_page_table(v3d); ret = v3d_sched_init(v3d); if (ret) { drm_mm_takedown(&v3d->mm); dma_free_coherent(v3d->dev, 4096 * 1024, (void *)v3d->pt, v3d->pt_paddr); } return 0; } void v3d_gem_destroy(struct drm_device *dev) { struct v3d_dev *v3d = to_v3d_dev(dev); v3d_sched_fini(v3d); /* Waiting for exec to finish would need to be done before * unregistering V3D. */ WARN_ON(v3d->bin_job); WARN_ON(v3d->render_job); drm_mm_takedown(&v3d->mm); dma_free_coherent(v3d->dev, 4096 * 1024, (void *)v3d->pt, v3d->pt_paddr); }