// SPDX-License-Identifier: GPL-2.0 /* Copyright 2018 Marty E. Plummer */ /* Copyright 2019 Linaro, Ltd., Rob Herring */ /* Copyright 2019 Collabora ltd. */ #include #include #include #include #include #include #include #include #include #include "panfrost_device.h" #include "panfrost_gem.h" #include "panfrost_mmu.h" #include "panfrost_job.h" #include "panfrost_gpu.h" #include "panfrost_perfcnt.h" static bool unstable_ioctls; module_param_unsafe(unstable_ioctls, bool, 0600); static int panfrost_ioctl_get_param(struct drm_device *ddev, void *data, struct drm_file *file) { struct drm_panfrost_get_param *param = data; struct panfrost_device *pfdev = ddev->dev_private; if (param->pad != 0) return -EINVAL; #define PANFROST_FEATURE(name, member) \ case DRM_PANFROST_PARAM_ ## name: \ param->value = pfdev->features.member; \ break #define PANFROST_FEATURE_ARRAY(name, member, max) \ case DRM_PANFROST_PARAM_ ## name ## 0 ... \ DRM_PANFROST_PARAM_ ## name ## max: \ param->value = pfdev->features.member[param->param - \ DRM_PANFROST_PARAM_ ## name ## 0]; \ break switch (param->param) { PANFROST_FEATURE(GPU_PROD_ID, id); PANFROST_FEATURE(GPU_REVISION, revision); PANFROST_FEATURE(SHADER_PRESENT, shader_present); PANFROST_FEATURE(TILER_PRESENT, tiler_present); PANFROST_FEATURE(L2_PRESENT, l2_present); PANFROST_FEATURE(STACK_PRESENT, stack_present); PANFROST_FEATURE(AS_PRESENT, as_present); PANFROST_FEATURE(JS_PRESENT, js_present); PANFROST_FEATURE(L2_FEATURES, l2_features); PANFROST_FEATURE(CORE_FEATURES, core_features); PANFROST_FEATURE(TILER_FEATURES, tiler_features); PANFROST_FEATURE(MEM_FEATURES, mem_features); PANFROST_FEATURE(MMU_FEATURES, mmu_features); PANFROST_FEATURE(THREAD_FEATURES, thread_features); PANFROST_FEATURE(MAX_THREADS, max_threads); PANFROST_FEATURE(THREAD_MAX_WORKGROUP_SZ, thread_max_workgroup_sz); PANFROST_FEATURE(THREAD_MAX_BARRIER_SZ, thread_max_barrier_sz); PANFROST_FEATURE(COHERENCY_FEATURES, coherency_features); PANFROST_FEATURE_ARRAY(TEXTURE_FEATURES, texture_features, 3); PANFROST_FEATURE_ARRAY(JS_FEATURES, js_features, 15); PANFROST_FEATURE(NR_CORE_GROUPS, nr_core_groups); PANFROST_FEATURE(THREAD_TLS_ALLOC, thread_tls_alloc); default: return -EINVAL; } return 0; } static int panfrost_ioctl_create_bo(struct drm_device *dev, void *data, struct drm_file *file) { struct panfrost_file_priv *priv = file->driver_priv; struct panfrost_gem_object *bo; struct drm_panfrost_create_bo *args = data; struct panfrost_gem_mapping *mapping; if (!args->size || args->pad || (args->flags & ~(PANFROST_BO_NOEXEC | PANFROST_BO_HEAP))) return -EINVAL; /* Heaps should never be executable */ if ((args->flags & PANFROST_BO_HEAP) && !(args->flags & PANFROST_BO_NOEXEC)) return -EINVAL; bo = panfrost_gem_create_with_handle(file, dev, args->size, args->flags, &args->handle); if (IS_ERR(bo)) return PTR_ERR(bo); mapping = panfrost_gem_mapping_get(bo, priv); if (!mapping) { drm_gem_object_put(&bo->base.base); return -EINVAL; } args->offset = mapping->mmnode.start << PAGE_SHIFT; panfrost_gem_mapping_put(mapping); return 0; } /** * panfrost_lookup_bos() - Sets up job->bo[] with the GEM objects * referenced by the job. * @dev: DRM device * @file_priv: DRM file for this fd * @args: IOCTL args * @job: job being set up * * Resolve handles from userspace to BOs and attach them to job. * * Note that this function doesn't need to unreference the BOs on * failure, because that will happen at panfrost_job_cleanup() time. */ static int panfrost_lookup_bos(struct drm_device *dev, struct drm_file *file_priv, struct drm_panfrost_submit *args, struct panfrost_job *job) { struct panfrost_file_priv *priv = file_priv->driver_priv; struct panfrost_gem_object *bo; unsigned int i; int ret; job->bo_count = args->bo_handle_count; if (!job->bo_count) return 0; job->implicit_fences = kvmalloc_array(job->bo_count, sizeof(struct dma_fence *), GFP_KERNEL | __GFP_ZERO); if (!job->implicit_fences) return -ENOMEM; ret = drm_gem_objects_lookup(file_priv, (void __user *)(uintptr_t)args->bo_handles, job->bo_count, &job->bos); if (ret) return ret; job->mappings = kvmalloc_array(job->bo_count, sizeof(struct panfrost_gem_mapping *), GFP_KERNEL | __GFP_ZERO); if (!job->mappings) return -ENOMEM; for (i = 0; i < job->bo_count; i++) { struct panfrost_gem_mapping *mapping; bo = to_panfrost_bo(job->bos[i]); mapping = panfrost_gem_mapping_get(bo, priv); if (!mapping) { ret = -EINVAL; break; } atomic_inc(&bo->gpu_usecount); job->mappings[i] = mapping; } return ret; } /** * panfrost_copy_in_sync() - Sets up job->in_fences[] with the sync objects * referenced by the job. * @dev: DRM device * @file_priv: DRM file for this fd * @args: IOCTL args * @job: job being set up * * Resolve syncobjs from userspace to fences and attach them to job. * * Note that this function doesn't need to unreference the fences on * failure, because that will happen at panfrost_job_cleanup() time. */ static int panfrost_copy_in_sync(struct drm_device *dev, struct drm_file *file_priv, struct drm_panfrost_submit *args, struct panfrost_job *job) { u32 *handles; int ret = 0; int i; job->in_fence_count = args->in_sync_count; if (!job->in_fence_count) return 0; job->in_fences = kvmalloc_array(job->in_fence_count, sizeof(struct dma_fence *), GFP_KERNEL | __GFP_ZERO); if (!job->in_fences) { DRM_DEBUG("Failed to allocate job in fences\n"); return -ENOMEM; } handles = kvmalloc_array(job->in_fence_count, sizeof(u32), GFP_KERNEL); if (!handles) { ret = -ENOMEM; DRM_DEBUG("Failed to allocate incoming syncobj handles\n"); goto fail; } if (copy_from_user(handles, (void __user *)(uintptr_t)args->in_syncs, job->in_fence_count * sizeof(u32))) { ret = -EFAULT; DRM_DEBUG("Failed to copy in syncobj handles\n"); goto fail; } for (i = 0; i < job->in_fence_count; i++) { ret = drm_syncobj_find_fence(file_priv, handles[i], 0, 0, &job->in_fences[i]); if (ret == -EINVAL) goto fail; } fail: kvfree(handles); return ret; } static int panfrost_ioctl_submit(struct drm_device *dev, void *data, struct drm_file *file) { struct panfrost_device *pfdev = dev->dev_private; struct drm_panfrost_submit *args = data; struct drm_syncobj *sync_out = NULL; struct panfrost_job *job; int ret = 0; if (!args->jc) return -EINVAL; if (args->requirements && args->requirements != PANFROST_JD_REQ_FS) return -EINVAL; if (args->out_sync > 0) { sync_out = drm_syncobj_find(file, args->out_sync); if (!sync_out) return -ENODEV; } job = kzalloc(sizeof(*job), GFP_KERNEL); if (!job) { ret = -ENOMEM; goto fail_out_sync; } kref_init(&job->refcount); job->pfdev = pfdev; job->jc = args->jc; job->requirements = args->requirements; job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev); job->file_priv = file->driver_priv; ret = panfrost_copy_in_sync(dev, file, args, job); if (ret) goto fail_job; ret = panfrost_lookup_bos(dev, file, args, job); if (ret) goto fail_job; ret = panfrost_job_push(job); if (ret) goto fail_job; /* Update the return sync object for the job */ if (sync_out) drm_syncobj_replace_fence(sync_out, job->render_done_fence); fail_job: panfrost_job_put(job); fail_out_sync: if (sync_out) drm_syncobj_put(sync_out); return ret; } static int panfrost_ioctl_wait_bo(struct drm_device *dev, void *data, struct drm_file *file_priv) { long ret; struct drm_panfrost_wait_bo *args = data; struct drm_gem_object *gem_obj; unsigned long timeout = drm_timeout_abs_to_jiffies(args->timeout_ns); if (args->pad) return -EINVAL; gem_obj = drm_gem_object_lookup(file_priv, args->handle); if (!gem_obj) return -ENOENT; ret = dma_resv_wait_timeout_rcu(gem_obj->resv, true, true, timeout); if (!ret) ret = timeout ? -ETIMEDOUT : -EBUSY; drm_gem_object_put(gem_obj); return ret; } static int panfrost_ioctl_mmap_bo(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_panfrost_mmap_bo *args = data; struct drm_gem_object *gem_obj; int ret; if (args->flags != 0) { DRM_INFO("unknown mmap_bo flags: %d\n", args->flags); return -EINVAL; } gem_obj = drm_gem_object_lookup(file_priv, args->handle); if (!gem_obj) { DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle); return -ENOENT; } /* Don't allow mmapping of heap objects as pages are not pinned. */ if (to_panfrost_bo(gem_obj)->is_heap) { ret = -EINVAL; goto out; } ret = drm_gem_create_mmap_offset(gem_obj); if (ret == 0) args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node); out: drm_gem_object_put(gem_obj); return ret; } static int panfrost_ioctl_get_bo_offset(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct panfrost_file_priv *priv = file_priv->driver_priv; struct drm_panfrost_get_bo_offset *args = data; struct panfrost_gem_mapping *mapping; struct drm_gem_object *gem_obj; struct panfrost_gem_object *bo; gem_obj = drm_gem_object_lookup(file_priv, args->handle); if (!gem_obj) { DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle); return -ENOENT; } bo = to_panfrost_bo(gem_obj); mapping = panfrost_gem_mapping_get(bo, priv); drm_gem_object_put(gem_obj); if (!mapping) return -EINVAL; args->offset = mapping->mmnode.start << PAGE_SHIFT; panfrost_gem_mapping_put(mapping); return 0; } static int panfrost_ioctl_madvise(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct panfrost_file_priv *priv = file_priv->driver_priv; struct drm_panfrost_madvise *args = data; struct panfrost_device *pfdev = dev->dev_private; struct drm_gem_object *gem_obj; struct panfrost_gem_object *bo; int ret = 0; gem_obj = drm_gem_object_lookup(file_priv, args->handle); if (!gem_obj) { DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle); return -ENOENT; } bo = to_panfrost_bo(gem_obj); mutex_lock(&pfdev->shrinker_lock); mutex_lock(&bo->mappings.lock); if (args->madv == PANFROST_MADV_DONTNEED) { struct panfrost_gem_mapping *first; first = list_first_entry(&bo->mappings.list, struct panfrost_gem_mapping, node); /* * If we want to mark the BO purgeable, there must be only one * user: the caller FD. * We could do something smarter and mark the BO purgeable only * when all its users have marked it purgeable, but globally * visible/shared BOs are likely to never be marked purgeable * anyway, so let's not bother. */ if (!list_is_singular(&bo->mappings.list) || WARN_ON_ONCE(first->mmu != &priv->mmu)) { ret = -EINVAL; goto out_unlock_mappings; } } args->retained = drm_gem_shmem_madvise(gem_obj, args->madv); if (args->retained) { if (args->madv == PANFROST_MADV_DONTNEED) list_add_tail(&bo->base.madv_list, &pfdev->shrinker_list); else if (args->madv == PANFROST_MADV_WILLNEED) list_del_init(&bo->base.madv_list); } out_unlock_mappings: mutex_unlock(&bo->mappings.lock); mutex_unlock(&pfdev->shrinker_lock); drm_gem_object_put(gem_obj); return ret; } int panfrost_unstable_ioctl_check(void) { if (!unstable_ioctls) return -ENOSYS; return 0; } #define PFN_4G (SZ_4G >> PAGE_SHIFT) #define PFN_4G_MASK (PFN_4G - 1) #define PFN_16M (SZ_16M >> PAGE_SHIFT) static void panfrost_drm_mm_color_adjust(const struct drm_mm_node *node, unsigned long color, u64 *start, u64 *end) { /* Executable buffers can't start or end on a 4GB boundary */ if (!(color & PANFROST_BO_NOEXEC)) { u64 next_seg; if ((*start & PFN_4G_MASK) == 0) (*start)++; if ((*end & PFN_4G_MASK) == 0) (*end)--; next_seg = ALIGN(*start, PFN_4G); if (next_seg - *start <= PFN_16M) *start = next_seg + 1; *end = min(*end, ALIGN(*start, PFN_4G) - 1); } } static int panfrost_open(struct drm_device *dev, struct drm_file *file) { int ret; struct panfrost_device *pfdev = dev->dev_private; struct panfrost_file_priv *panfrost_priv; panfrost_priv = kzalloc(sizeof(*panfrost_priv), GFP_KERNEL); if (!panfrost_priv) return -ENOMEM; panfrost_priv->pfdev = pfdev; file->driver_priv = panfrost_priv; spin_lock_init(&panfrost_priv->mm_lock); /* 4G enough for now. can be 48-bit */ drm_mm_init(&panfrost_priv->mm, SZ_32M >> PAGE_SHIFT, (SZ_4G - SZ_32M) >> PAGE_SHIFT); panfrost_priv->mm.color_adjust = panfrost_drm_mm_color_adjust; ret = panfrost_mmu_pgtable_alloc(panfrost_priv); if (ret) goto err_pgtable; ret = panfrost_job_open(panfrost_priv); if (ret) goto err_job; return 0; err_job: panfrost_mmu_pgtable_free(panfrost_priv); err_pgtable: drm_mm_takedown(&panfrost_priv->mm); kfree(panfrost_priv); return ret; } static void panfrost_postclose(struct drm_device *dev, struct drm_file *file) { struct panfrost_file_priv *panfrost_priv = file->driver_priv; panfrost_perfcnt_close(file); panfrost_job_close(panfrost_priv); panfrost_mmu_pgtable_free(panfrost_priv); drm_mm_takedown(&panfrost_priv->mm); kfree(panfrost_priv); } static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = { #define PANFROST_IOCTL(n, func, flags) \ DRM_IOCTL_DEF_DRV(PANFROST_##n, panfrost_ioctl_##func, flags) PANFROST_IOCTL(SUBMIT, submit, DRM_RENDER_ALLOW), PANFROST_IOCTL(WAIT_BO, wait_bo, DRM_RENDER_ALLOW), PANFROST_IOCTL(CREATE_BO, create_bo, DRM_RENDER_ALLOW), PANFROST_IOCTL(MMAP_BO, mmap_bo, DRM_RENDER_ALLOW), PANFROST_IOCTL(GET_PARAM, get_param, DRM_RENDER_ALLOW), PANFROST_IOCTL(GET_BO_OFFSET, get_bo_offset, DRM_RENDER_ALLOW), PANFROST_IOCTL(PERFCNT_ENABLE, perfcnt_enable, DRM_RENDER_ALLOW), PANFROST_IOCTL(PERFCNT_DUMP, perfcnt_dump, DRM_RENDER_ALLOW), PANFROST_IOCTL(MADVISE, madvise, DRM_RENDER_ALLOW), }; DEFINE_DRM_GEM_FOPS(panfrost_drm_driver_fops); /* * Panfrost driver version: * - 1.0 - initial interface * - 1.1 - adds HEAP and NOEXEC flags for CREATE_BO */ static struct drm_driver panfrost_drm_driver = { .driver_features = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ, .open = panfrost_open, .postclose = panfrost_postclose, .ioctls = panfrost_drm_driver_ioctls, .num_ioctls = ARRAY_SIZE(panfrost_drm_driver_ioctls), .fops = &panfrost_drm_driver_fops, .name = "panfrost", .desc = "panfrost DRM", .date = "20180908", .major = 1, .minor = 1, .gem_create_object = panfrost_gem_create_object, .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table, .gem_prime_mmap = drm_gem_prime_mmap, }; static int panfrost_probe(struct platform_device *pdev) { struct panfrost_device *pfdev; struct drm_device *ddev; int err; pfdev = devm_kzalloc(&pdev->dev, sizeof(*pfdev), GFP_KERNEL); if (!pfdev) return -ENOMEM; pfdev->pdev = pdev; pfdev->dev = &pdev->dev; platform_set_drvdata(pdev, pfdev); pfdev->comp = of_device_get_match_data(&pdev->dev); if (!pfdev->comp) return -ENODEV; /* Allocate and initialze the DRM device. */ ddev = drm_dev_alloc(&panfrost_drm_driver, &pdev->dev); if (IS_ERR(ddev)) return PTR_ERR(ddev); ddev->dev_private = pfdev; pfdev->ddev = ddev; mutex_init(&pfdev->shrinker_lock); INIT_LIST_HEAD(&pfdev->shrinker_list); err = panfrost_device_init(pfdev); if (err) { if (err != -EPROBE_DEFER) dev_err(&pdev->dev, "Fatal error during GPU init\n"); goto err_out0; } pm_runtime_set_active(pfdev->dev); pm_runtime_mark_last_busy(pfdev->dev); pm_runtime_enable(pfdev->dev); pm_runtime_set_autosuspend_delay(pfdev->dev, 50); /* ~3 frames */ pm_runtime_use_autosuspend(pfdev->dev); /* * Register the DRM device with the core and the connectors with * sysfs */ err = drm_dev_register(ddev, 0); if (err < 0) goto err_out1; panfrost_gem_shrinker_init(ddev); return 0; err_out1: pm_runtime_disable(pfdev->dev); panfrost_device_fini(pfdev); err_out0: drm_dev_put(ddev); return err; } static int panfrost_remove(struct platform_device *pdev) { struct panfrost_device *pfdev = platform_get_drvdata(pdev); struct drm_device *ddev = pfdev->ddev; drm_dev_unregister(ddev); panfrost_gem_shrinker_cleanup(ddev); pm_runtime_get_sync(pfdev->dev); panfrost_device_fini(pfdev); pm_runtime_put_sync_suspend(pfdev->dev); pm_runtime_disable(pfdev->dev); drm_dev_put(ddev); return 0; } static const char * const default_supplies[] = { "mali" }; static const struct panfrost_compatible default_data = { .num_supplies = ARRAY_SIZE(default_supplies), .supply_names = default_supplies, .num_pm_domains = 1, /* optional */ .pm_domain_names = NULL, }; static const struct panfrost_compatible amlogic_data = { .num_supplies = ARRAY_SIZE(default_supplies), .supply_names = default_supplies, .vendor_quirk = panfrost_gpu_amlogic_quirk, }; static const struct of_device_id dt_match[] = { /* Set first to probe before the generic compatibles */ { .compatible = "amlogic,meson-gxm-mali", .data = &amlogic_data, }, { .compatible = "amlogic,meson-g12a-mali", .data = &amlogic_data, }, { .compatible = "arm,mali-t604", .data = &default_data, }, { .compatible = "arm,mali-t624", .data = &default_data, }, { .compatible = "arm,mali-t628", .data = &default_data, }, { .compatible = "arm,mali-t720", .data = &default_data, }, { .compatible = "arm,mali-t760", .data = &default_data, }, { .compatible = "arm,mali-t820", .data = &default_data, }, { .compatible = "arm,mali-t830", .data = &default_data, }, { .compatible = "arm,mali-t860", .data = &default_data, }, { .compatible = "arm,mali-t880", .data = &default_data, }, { .compatible = "arm,mali-bifrost", .data = &default_data, }, {} }; MODULE_DEVICE_TABLE(of, dt_match); static const struct dev_pm_ops panfrost_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) SET_RUNTIME_PM_OPS(panfrost_device_suspend, panfrost_device_resume, NULL) }; static struct platform_driver panfrost_driver = { .probe = panfrost_probe, .remove = panfrost_remove, .driver = { .name = "panfrost", .pm = &panfrost_pm_ops, .of_match_table = dt_match, }, }; module_platform_driver(panfrost_driver); MODULE_AUTHOR("Panfrost Project Developers"); MODULE_DESCRIPTION("Panfrost DRM Driver"); MODULE_LICENSE("GPL v2");