drivers/gpu/drm/panfrost/panfrost_drv.c - SHIFTPHONES/kernel/common - Gitiles

 // SPDX-License-Identifier: GPL-2.0
 /* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */
 /* Copyright 2019 Linaro, Ltd., Rob Herring <robh@kernel.org> */
 /* Copyright 2019 Collabora ltd. */

 #include <linux/module.h>
 #include <linux/of_platform.h>
 #include <linux/pagemap.h>
 #include <linux/pm_runtime.h>
 #include <drm/panfrost_drm.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_ioctl.h>
 #include <drm/drm_syncobj.h>
 #include <drm/drm_utils.h>

 #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");
	// SPDX-License-Identifier: GPL-2.0
	/* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */
	/* Copyright 2019 Linaro, Ltd., Rob Herring <robh@kernel.org> */
	/* Copyright 2019 Collabora ltd. */

	#include <linux/module.h>
	#include <linux/of_platform.h>
	#include <linux/pagemap.h>
	#include <linux/pm_runtime.h>
	#include <drm/panfrost_drm.h>
	#include <drm/drm_drv.h>
	#include <drm/drm_ioctl.h>
	#include <drm/drm_syncobj.h>
	#include <drm/drm_utils.h>

	#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");