Adding upstream version 6.8.9.upstream/6.8.9

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1501 insertions, 0 deletions

diff --git a/drivers/gpu/drm/imagination/pvr_drv.c b/drivers/gpu/drm/imagination/pvr_drv.c
new file mode 100644
index 0000000000..5c3b2d58d7
--- /dev/null
+++ b/drivers/gpu/drm/imagination/pvr_drv.c
@@ -0,0 +1,1501 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/* Copyright (c) 2023 Imagination Technologies Ltd. */
+
+#include "pvr_context.h"
+#include "pvr_debugfs.h"
+#include "pvr_device.h"
+#include "pvr_drv.h"
+#include "pvr_free_list.h"
+#include "pvr_gem.h"
+#include "pvr_hwrt.h"
+#include "pvr_job.h"
+#include "pvr_mmu.h"
+#include "pvr_power.h"
+#include "pvr_rogue_defs.h"
+#include "pvr_rogue_fwif_client.h"
+#include "pvr_rogue_fwif_shared.h"
+#include "pvr_vm.h"
+
+#include <uapi/drm/pvr_drm.h>
+
+#include <drm/drm_device.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_file.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_ioctl.h>
+
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/xarray.h>
+
+/**
+ * DOC: PowerVR (Series 6 and later) and IMG Graphics Driver
+ *
+ * This driver supports the following PowerVR/IMG graphics cores from Imagination Technologies:
+ *
+ * * AXE-1-16M (found in Texas Instruments AM62)
+ */
+
+/**
+ * pvr_ioctl_create_bo() - IOCTL to create a GEM buffer object.
+ * @drm_dev: [IN] Target DRM device.
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ * &struct drm_pvr_ioctl_create_bo_args.
+ * @file: [IN] DRM file-private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_CREATE_BO.
+ *
+ * Return:
+ *  * 0 on success,
+ *  * -%EINVAL if the value of &drm_pvr_ioctl_create_bo_args.size is zero
+ *    or wider than &typedef size_t,
+ *  * -%EINVAL if any bits in &drm_pvr_ioctl_create_bo_args.flags that are
+ *    reserved or undefined are set,
+ *  * -%EINVAL if any padding fields in &drm_pvr_ioctl_create_bo_args are not
+ *    zero,
+ *  * Any error encountered while creating the object (see
+ *    pvr_gem_object_create()), or
+ *  * Any error encountered while transferring ownership of the object into a
+ *    userspace-accessible handle (see pvr_gem_object_into_handle()).
+ */
+static int
+pvr_ioctl_create_bo(struct drm_device *drm_dev, void *raw_args,
+		    struct drm_file *file)
+{
+	struct drm_pvr_ioctl_create_bo_args *args = raw_args;
+	struct pvr_device *pvr_dev = to_pvr_device(drm_dev);
+	struct pvr_file *pvr_file = to_pvr_file(file);
+
+	struct pvr_gem_object *pvr_obj;
+	size_t sanitized_size;
+
+	int idx;
+	int err;
+
+	if (!drm_dev_enter(drm_dev, &idx))
+		return -EIO;
+
+	/* All padding fields must be zeroed. */
+	if (args->_padding_c != 0) {
+		err = -EINVAL;
+		goto err_drm_dev_exit;
+	}
+
+	/*
+	 * On 64-bit platforms (our primary target), size_t is a u64. However,
+	 * on other architectures we have to check for overflow when casting
+	 * down to size_t from u64.
+	 *
+	 * We also disallow zero-sized allocations, and reserved (kernel-only)
+	 * flags.
+	 */
+	if (args->size > SIZE_MAX || args->size == 0 || args->flags &
+	    ~DRM_PVR_BO_FLAGS_MASK || args->size & (PVR_DEVICE_PAGE_SIZE - 1)) {
+		err = -EINVAL;
+		goto err_drm_dev_exit;
+	}
+
+	sanitized_size = (size_t)args->size;
+
+	/*
+	 * Create a buffer object and transfer ownership to a userspace-
+	 * accessible handle.
+	 */
+	pvr_obj = pvr_gem_object_create(pvr_dev, sanitized_size, args->flags);
+	if (IS_ERR(pvr_obj)) {
+		err = PTR_ERR(pvr_obj);
+		goto err_drm_dev_exit;
+	}
+
+	/* This function will not modify &args->handle unless it succeeds. */
+	err = pvr_gem_object_into_handle(pvr_obj, pvr_file, &args->handle);
+	if (err)
+		goto err_destroy_obj;
+
+	drm_dev_exit(idx);
+
+	return 0;
+
+err_destroy_obj:
+	/*
+	 * GEM objects are refcounted, so there is no explicit destructor
+	 * function. Instead, we release the singular reference we currently
+	 * hold on the object and let GEM take care of the rest.
+	 */
+	pvr_gem_object_put(pvr_obj);
+
+err_drm_dev_exit:
+	drm_dev_exit(idx);
+
+	return err;
+}
+
+/**
+ * pvr_ioctl_get_bo_mmap_offset() - IOCTL to generate a "fake" offset to be
+ * used when calling mmap() from userspace to map the given GEM buffer object
+ * @drm_dev: [IN] DRM device (unused).
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ *                     &struct drm_pvr_ioctl_get_bo_mmap_offset_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_GET_BO_MMAP_OFFSET.
+ *
+ * This IOCTL does *not* perform an mmap. See the docs on
+ * &struct drm_pvr_ioctl_get_bo_mmap_offset_args for details.
+ *
+ * Return:
+ *  * 0 on success,
+ *  * -%ENOENT if the handle does not reference a valid GEM buffer object,
+ *  * -%EINVAL if any padding fields in &struct
+ *    drm_pvr_ioctl_get_bo_mmap_offset_args are not zero, or
+ *  * Any error returned by drm_gem_create_mmap_offset().
+ */
+static int
+pvr_ioctl_get_bo_mmap_offset(struct drm_device *drm_dev, void *raw_args,
+			     struct drm_file *file)
+{
+	struct drm_pvr_ioctl_get_bo_mmap_offset_args *args = raw_args;
+	struct pvr_file *pvr_file = to_pvr_file(file);
+	struct pvr_gem_object *pvr_obj;
+	struct drm_gem_object *gem_obj;
+	int idx;
+	int ret;
+
+	if (!drm_dev_enter(drm_dev, &idx))
+		return -EIO;
+
+	/* All padding fields must be zeroed. */
+	if (args->_padding_4 != 0) {
+		ret = -EINVAL;
+		goto err_drm_dev_exit;
+	}
+
+	/*
+	 * Obtain a kernel reference to the buffer object. This reference is
+	 * counted and must be manually dropped before returning. If a buffer
+	 * object cannot be found for the specified handle, return -%ENOENT (No
+	 * such file or directory).
+	 */
+	pvr_obj = pvr_gem_object_from_handle(pvr_file, args->handle);
+	if (!pvr_obj) {
+		ret = -ENOENT;
+		goto err_drm_dev_exit;
+	}
+
+	gem_obj = gem_from_pvr_gem(pvr_obj);
+
+	/*
+	 * Allocate a fake offset which can be used in userspace calls to mmap
+	 * on the DRM device file. If this fails, return the error code. This
+	 * operation is idempotent.
+	 */
+	ret = drm_gem_create_mmap_offset(gem_obj);
+	if (ret != 0) {
+		/* Drop our reference to the buffer object. */
+		drm_gem_object_put(gem_obj);
+		goto err_drm_dev_exit;
+	}
+
+	/*
+	 * Read out the fake offset allocated by the earlier call to
+	 * drm_gem_create_mmap_offset.
+	 */
+	args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
+
+	/* Drop our reference to the buffer object. */
+	pvr_gem_object_put(pvr_obj);
+
+err_drm_dev_exit:
+	drm_dev_exit(idx);
+
+	return ret;
+}
+
+static __always_inline u64
+pvr_fw_version_packed(u32 major, u32 minor)
+{
+	return ((u64)major << 32) | minor;
+}
+
+static u32
+rogue_get_common_store_partition_space_size(struct pvr_device *pvr_dev)
+{
+	u32 max_partitions = 0;
+	u32 tile_size_x = 0;
+	u32 tile_size_y = 0;
+
+	PVR_FEATURE_VALUE(pvr_dev, tile_size_x, &tile_size_x);
+	PVR_FEATURE_VALUE(pvr_dev, tile_size_y, &tile_size_y);
+	PVR_FEATURE_VALUE(pvr_dev, max_partitions, &max_partitions);
+
+	if (tile_size_x == 16 && tile_size_y == 16) {
+		u32 usc_min_output_registers_per_pix = 0;
+
+		PVR_FEATURE_VALUE(pvr_dev, usc_min_output_registers_per_pix,
+				  &usc_min_output_registers_per_pix);
+
+		return tile_size_x * tile_size_y * max_partitions *
+		       usc_min_output_registers_per_pix;
+	}
+
+	return max_partitions * 1024;
+}
+
+static u32
+rogue_get_common_store_alloc_region_size(struct pvr_device *pvr_dev)
+{
+	u32 common_store_size_in_dwords = 512 * 4 * 4;
+	u32 alloc_region_size;
+
+	PVR_FEATURE_VALUE(pvr_dev, common_store_size_in_dwords, &common_store_size_in_dwords);
+
+	alloc_region_size = common_store_size_in_dwords - (256U * 4U) -
+			    rogue_get_common_store_partition_space_size(pvr_dev);
+
+	if (PVR_HAS_QUIRK(pvr_dev, 44079)) {
+		u32 common_store_split_point = (768U * 4U * 4U);
+
+		return min(common_store_split_point - (256U * 4U), alloc_region_size);
+	}
+
+	return alloc_region_size;
+}
+
+static inline u32
+rogue_get_num_phantoms(struct pvr_device *pvr_dev)
+{
+	u32 num_clusters = 1;
+
+	PVR_FEATURE_VALUE(pvr_dev, num_clusters, &num_clusters);
+
+	return ROGUE_REQ_NUM_PHANTOMS(num_clusters);
+}
+
+static inline u32
+rogue_get_max_coeffs(struct pvr_device *pvr_dev)
+{
+	u32 max_coeff_additional_portion = ROGUE_MAX_VERTEX_SHARED_REGISTERS;
+	u32 pending_allocation_shared_regs = 2U * 1024U;
+	u32 pending_allocation_coeff_regs = 0U;
+	u32 num_phantoms = rogue_get_num_phantoms(pvr_dev);
+	u32 tiles_in_flight = 0;
+	u32 max_coeff_pixel_portion;
+
+	PVR_FEATURE_VALUE(pvr_dev, isp_max_tiles_in_flight, &tiles_in_flight);
+	max_coeff_pixel_portion = DIV_ROUND_UP(tiles_in_flight, num_phantoms);
+	max_coeff_pixel_portion *= ROGUE_MAX_PIXEL_SHARED_REGISTERS;
+
+	/*
+	 * Compute tasks on cores with BRN48492 and without compute overlap may lock
+	 * up without two additional lines of coeffs.
+	 */
+	if (PVR_HAS_QUIRK(pvr_dev, 48492) && !PVR_HAS_FEATURE(pvr_dev, compute_overlap))
+		pending_allocation_coeff_regs = 2U * 1024U;
+
+	if (PVR_HAS_ENHANCEMENT(pvr_dev, 38748))
+		pending_allocation_shared_regs = 0;
+
+	if (PVR_HAS_ENHANCEMENT(pvr_dev, 38020))
+		max_coeff_additional_portion += ROGUE_MAX_COMPUTE_SHARED_REGISTERS;
+
+	return rogue_get_common_store_alloc_region_size(pvr_dev) + pending_allocation_coeff_regs -
+		(max_coeff_pixel_portion + max_coeff_additional_portion +
+		 pending_allocation_shared_regs);
+}
+
+static inline u32
+rogue_get_cdm_max_local_mem_size_regs(struct pvr_device *pvr_dev)
+{
+	u32 available_coeffs_in_dwords = rogue_get_max_coeffs(pvr_dev);
+
+	if (PVR_HAS_QUIRK(pvr_dev, 48492) && PVR_HAS_FEATURE(pvr_dev, roguexe) &&
+	    !PVR_HAS_FEATURE(pvr_dev, compute_overlap)) {
+		/* Driver must not use the 2 reserved lines. */
+		available_coeffs_in_dwords -= ROGUE_CSRM_LINE_SIZE_IN_DWORDS * 2;
+	}
+
+	/*
+	 * The maximum amount of local memory available to a kernel is the minimum
+	 * of the total number of coefficient registers available and the max common
+	 * store allocation size which can be made by the CDM.
+	 *
+	 * If any coeff lines are reserved for tessellation or pixel then we need to
+	 * subtract those too.
+	 */
+	return min(available_coeffs_in_dwords, (u32)ROGUE_MAX_PER_KERNEL_LOCAL_MEM_SIZE_REGS);
+}
+
+/**
+ * pvr_dev_query_gpu_info_get()
+ * @pvr_dev: Device pointer.
+ * @args: [IN] Device query arguments containing a pointer to a userspace
+ *        struct drm_pvr_dev_query_gpu_info.
+ *
+ * If the query object pointer is NULL, the size field is updated with the
+ * expected size of the query object.
+ *
+ * Returns:
+ *  * 0 on success, or if size is requested using a NULL pointer, or
+ *  * -%E2BIG if the indicated length of the allocation is less than is
+ *    required to contain the copied data, or
+ *  * -%EFAULT if local memory could not be copied to userspace.
+ */
+static int
+pvr_dev_query_gpu_info_get(struct pvr_device *pvr_dev,
+			   struct drm_pvr_ioctl_dev_query_args *args)
+{
+	struct drm_pvr_dev_query_gpu_info gpu_info = {0};
+	int err;
+
+	if (!args->pointer) {
+		args->size = sizeof(struct drm_pvr_dev_query_gpu_info);
+		return 0;
+	}
+
+	gpu_info.gpu_id =
+		pvr_gpu_id_to_packed_bvnc(&pvr_dev->gpu_id);
+	gpu_info.num_phantoms = rogue_get_num_phantoms(pvr_dev);
+
+	err = PVR_UOBJ_SET(args->pointer, args->size, gpu_info);
+	if (err < 0)
+		return err;
+
+	if (args->size > sizeof(gpu_info))
+		args->size = sizeof(gpu_info);
+	return 0;
+}
+
+/**
+ * pvr_dev_query_runtime_info_get()
+ * @pvr_dev: Device pointer.
+ * @args: [IN] Device query arguments containing a pointer to a userspace
+ *        struct drm_pvr_dev_query_runtime_info.
+ *
+ * If the query object pointer is NULL, the size field is updated with the
+ * expected size of the query object.
+ *
+ * Returns:
+ *  * 0 on success, or if size is requested using a NULL pointer, or
+ *  * -%E2BIG if the indicated length of the allocation is less than is
+ *    required to contain the copied data, or
+ *  * -%EFAULT if local memory could not be copied to userspace.
+ */
+static int
+pvr_dev_query_runtime_info_get(struct pvr_device *pvr_dev,
+			       struct drm_pvr_ioctl_dev_query_args *args)
+{
+	struct drm_pvr_dev_query_runtime_info runtime_info = {0};
+	int err;
+
+	if (!args->pointer) {
+		args->size = sizeof(struct drm_pvr_dev_query_runtime_info);
+		return 0;
+	}
+
+	runtime_info.free_list_min_pages =
+		pvr_get_free_list_min_pages(pvr_dev);
+	runtime_info.free_list_max_pages =
+		ROGUE_PM_MAX_FREELIST_SIZE / ROGUE_PM_PAGE_SIZE;
+	runtime_info.common_store_alloc_region_size =
+		rogue_get_common_store_alloc_region_size(pvr_dev);
+	runtime_info.common_store_partition_space_size =
+		rogue_get_common_store_partition_space_size(pvr_dev);
+	runtime_info.max_coeffs = rogue_get_max_coeffs(pvr_dev);
+	runtime_info.cdm_max_local_mem_size_regs =
+		rogue_get_cdm_max_local_mem_size_regs(pvr_dev);
+
+	err = PVR_UOBJ_SET(args->pointer, args->size, runtime_info);
+	if (err < 0)
+		return err;
+
+	if (args->size > sizeof(runtime_info))
+		args->size = sizeof(runtime_info);
+	return 0;
+}
+
+/**
+ * pvr_dev_query_quirks_get() - Unpack array of quirks at the address given
+ * in a struct drm_pvr_dev_query_quirks, or gets the amount of space required
+ * for it.
+ * @pvr_dev: Device pointer.
+ * @args: [IN] Device query arguments containing a pointer to a userspace
+ *        struct drm_pvr_dev_query_query_quirks.
+ *
+ * If the query object pointer is NULL, the size field is updated with the
+ * expected size of the query object.
+ * If the userspace pointer in the query object is NULL, or the count is
+ * short, no data is copied.
+ * The count field will be updated to that copied, or if either pointer is
+ * NULL, that which would have been copied.
+ * The size field in the query object will be updated to the size copied.
+ *
+ * Returns:
+ *  * 0 on success, or if size/count is requested using a NULL pointer, or
+ *  * -%EINVAL if args contained non-zero reserved fields, or
+ *  * -%E2BIG if the indicated length of the allocation is less than is
+ *    required to contain the copied data, or
+ *  * -%EFAULT if local memory could not be copied to userspace.
+ */
+static int
+pvr_dev_query_quirks_get(struct pvr_device *pvr_dev,
+			 struct drm_pvr_ioctl_dev_query_args *args)
+{
+	/*
+	 * @FIXME - hardcoding of numbers here is intended as an
+	 * intermediate step so the UAPI can be fixed, but requires a
+	 * a refactor in the future to store them in a more appropriate
+	 * location
+	 */
+	static const u32 umd_quirks_musthave[] = {
+		47217,
+		49927,
+		62269,
+	};
+	static const u32 umd_quirks[] = {
+		48545,
+		51764,
+	};
+	struct drm_pvr_dev_query_quirks query;
+	u32 out[ARRAY_SIZE(umd_quirks_musthave) + ARRAY_SIZE(umd_quirks)];
+	size_t out_musthave_count = 0;
+	size_t out_count = 0;
+	int err;
+
+	if (!args->pointer) {
+		args->size = sizeof(struct drm_pvr_dev_query_quirks);
+		return 0;
+	}
+
+	err = PVR_UOBJ_GET(query, args->size, args->pointer);
+
+	if (err < 0)
+		return err;
+	if (query._padding_c)
+		return -EINVAL;
+
+	for (int i = 0; i < ARRAY_SIZE(umd_quirks_musthave); i++) {
+		if (pvr_device_has_uapi_quirk(pvr_dev, umd_quirks_musthave[i])) {
+			out[out_count++] = umd_quirks_musthave[i];
+			out_musthave_count++;
+		}
+	}
+
+	for (int i = 0; i < ARRAY_SIZE(umd_quirks); i++) {
+		if (pvr_device_has_uapi_quirk(pvr_dev, umd_quirks[i]))
+			out[out_count++] = umd_quirks[i];
+	}
+
+	if (!query.quirks)
+		goto copy_out;
+	if (query.count < out_count)
+		return -E2BIG;
+
+	if (copy_to_user(u64_to_user_ptr(query.quirks), out,
+			 out_count * sizeof(u32))) {
+		return -EFAULT;
+	}
+
+	query.musthave_count = out_musthave_count;
+
+copy_out:
+	query.count = out_count;
+	err = PVR_UOBJ_SET(args->pointer, args->size, query);
+	if (err < 0)
+		return err;
+
+	args->size = sizeof(query);
+	return 0;
+}
+
+/**
+ * pvr_dev_query_enhancements_get() - Unpack array of enhancements at the
+ * address given in a struct drm_pvr_dev_query_enhancements, or gets the amount
+ * of space required for it.
+ * @pvr_dev: Device pointer.
+ * @args: [IN] Device query arguments containing a pointer to a userspace
+ *        struct drm_pvr_dev_query_enhancements.
+ *
+ * If the query object pointer is NULL, the size field is updated with the
+ * expected size of the query object.
+ * If the userspace pointer in the query object is NULL, or the count is
+ * short, no data is copied.
+ * The count field will be updated to that copied, or if either pointer is
+ * NULL, that which would have been copied.
+ * The size field in the query object will be updated to the size copied.
+ *
+ * Returns:
+ *  * 0 on success, or if size/count is requested using a NULL pointer, or
+ *  * -%EINVAL if args contained non-zero reserved fields, or
+ *  * -%E2BIG if the indicated length of the allocation is less than is
+ *    required to contain the copied data, or
+ *  * -%EFAULT if local memory could not be copied to userspace.
+ */
+static int
+pvr_dev_query_enhancements_get(struct pvr_device *pvr_dev,
+			       struct drm_pvr_ioctl_dev_query_args *args)
+{
+	/*
+	 * @FIXME - hardcoding of numbers here is intended as an
+	 * intermediate step so the UAPI can be fixed, but requires a
+	 * a refactor in the future to store them in a more appropriate
+	 * location
+	 */
+	const u32 umd_enhancements[] = {
+		35421,
+		42064,
+	};
+	struct drm_pvr_dev_query_enhancements query;
+	u32 out[ARRAY_SIZE(umd_enhancements)];
+	size_t out_idx = 0;
+	int err;
+
+	if (!args->pointer) {
+		args->size = sizeof(struct drm_pvr_dev_query_enhancements);
+		return 0;
+	}
+
+	err = PVR_UOBJ_GET(query, args->size, args->pointer);
+
+	if (err < 0)
+		return err;
+	if (query._padding_a)
+		return -EINVAL;
+	if (query._padding_c)
+		return -EINVAL;
+
+	for (int i = 0; i < ARRAY_SIZE(umd_enhancements); i++) {
+		if (pvr_device_has_uapi_enhancement(pvr_dev, umd_enhancements[i]))
+			out[out_idx++] = umd_enhancements[i];
+	}
+
+	if (!query.enhancements)
+		goto copy_out;
+	if (query.count < out_idx)
+		return -E2BIG;
+
+	if (copy_to_user(u64_to_user_ptr(query.enhancements), out,
+			 out_idx * sizeof(u32))) {
+		return -EFAULT;
+	}
+
+copy_out:
+	query.count = out_idx;
+	err = PVR_UOBJ_SET(args->pointer, args->size, query);
+	if (err < 0)
+		return err;
+
+	args->size = sizeof(query);
+	return 0;
+}
+
+/**
+ * pvr_ioctl_dev_query() - IOCTL to copy information about a device
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ *                     &struct drm_pvr_ioctl_dev_query_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_DEV_QUERY.
+ * If the given receiving struct pointer is NULL, or the indicated size is too
+ * small, the expected size of the struct type will be returned in the size
+ * argument field.
+ *
+ * Return:
+ *  * 0 on success or when fetching the size with args->pointer == NULL, or
+ *  * -%E2BIG if the indicated size of the receiving struct is less than is
+ *    required to contain the copied data, or
+ *  * -%EINVAL if the indicated struct type is unknown, or
+ *  * -%ENOMEM if local memory could not be allocated, or
+ *  * -%EFAULT if local memory could not be copied to userspace.
+ */
+static int
+pvr_ioctl_dev_query(struct drm_device *drm_dev, void *raw_args,
+		    struct drm_file *file)
+{
+	struct pvr_device *pvr_dev = to_pvr_device(drm_dev);
+	struct drm_pvr_ioctl_dev_query_args *args = raw_args;
+	int idx;
+	int ret = -EINVAL;
+
+	if (!drm_dev_enter(drm_dev, &idx))
+		return -EIO;
+
+	switch ((enum drm_pvr_dev_query)args->type) {
+	case DRM_PVR_DEV_QUERY_GPU_INFO_GET:
+		ret = pvr_dev_query_gpu_info_get(pvr_dev, args);
+		break;
+
+	case DRM_PVR_DEV_QUERY_RUNTIME_INFO_GET:
+		ret = pvr_dev_query_runtime_info_get(pvr_dev, args);
+		break;
+
+	case DRM_PVR_DEV_QUERY_QUIRKS_GET:
+		ret = pvr_dev_query_quirks_get(pvr_dev, args);
+		break;
+
+	case DRM_PVR_DEV_QUERY_ENHANCEMENTS_GET:
+		ret = pvr_dev_query_enhancements_get(pvr_dev, args);
+		break;
+
+	case DRM_PVR_DEV_QUERY_HEAP_INFO_GET:
+		ret = pvr_heap_info_get(pvr_dev, args);
+		break;
+
+	case DRM_PVR_DEV_QUERY_STATIC_DATA_AREAS_GET:
+		ret = pvr_static_data_areas_get(pvr_dev, args);
+		break;
+	}
+
+	drm_dev_exit(idx);
+
+	return ret;
+}
+
+/**
+ * pvr_ioctl_create_context() - IOCTL to create a context
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ *                     &struct drm_pvr_ioctl_create_context_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_CREATE_CONTEXT.
+ *
+ * Return:
+ *  * 0 on success, or
+ *  * -%EINVAL if provided arguments are invalid, or
+ *  * -%EFAULT if arguments can't be copied from userspace, or
+ *  * Any error returned by pvr_create_render_context().
+ */
+static int
+pvr_ioctl_create_context(struct drm_device *drm_dev, void *raw_args,
+			 struct drm_file *file)
+{
+	struct drm_pvr_ioctl_create_context_args *args = raw_args;
+	struct pvr_file *pvr_file = file->driver_priv;
+	int idx;
+	int ret;
+
+	if (!drm_dev_enter(drm_dev, &idx))
+		return -EIO;
+
+	ret = pvr_context_create(pvr_file, args);
+
+	drm_dev_exit(idx);
+
+	return ret;
+}
+
+/**
+ * pvr_ioctl_destroy_context() - IOCTL to destroy a context
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ *                     &struct drm_pvr_ioctl_destroy_context_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_DESTROY_CONTEXT.
+ *
+ * Return:
+ *  * 0 on success, or
+ *  * -%EINVAL if context not in context list.
+ */
+static int
+pvr_ioctl_destroy_context(struct drm_device *drm_dev, void *raw_args,
+			  struct drm_file *file)
+{
+	struct drm_pvr_ioctl_destroy_context_args *args = raw_args;
+	struct pvr_file *pvr_file = file->driver_priv;
+
+	if (args->_padding_4)
+		return -EINVAL;
+
+	return pvr_context_destroy(pvr_file, args->handle);
+}
+
+/**
+ * pvr_ioctl_create_free_list() - IOCTL to create a free list
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ *                     &struct drm_pvr_ioctl_create_free_list_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_CREATE_FREE_LIST.
+ *
+ * Return:
+ *  * 0 on success, or
+ *  * Any error returned by pvr_free_list_create().
+ */
+static int
+pvr_ioctl_create_free_list(struct drm_device *drm_dev, void *raw_args,
+			   struct drm_file *file)
+{
+	struct drm_pvr_ioctl_create_free_list_args *args = raw_args;
+	struct pvr_file *pvr_file = to_pvr_file(file);
+	struct pvr_free_list *free_list;
+	int idx;
+	int err;
+
+	if (!drm_dev_enter(drm_dev, &idx))
+		return -EIO;
+
+	free_list = pvr_free_list_create(pvr_file, args);
+	if (IS_ERR(free_list)) {
+		err = PTR_ERR(free_list);
+		goto err_drm_dev_exit;
+	}
+
+	/* Allocate object handle for userspace. */
+	err = xa_alloc(&pvr_file->free_list_handles,
+		       &args->handle,
+		       free_list,
+		       xa_limit_32b,
+		       GFP_KERNEL);
+	if (err < 0)
+		goto err_cleanup;
+
+	drm_dev_exit(idx);
+
+	return 0;
+
+err_cleanup:
+	pvr_free_list_put(free_list);
+
+err_drm_dev_exit:
+	drm_dev_exit(idx);
+
+	return err;
+}
+
+/**
+ * pvr_ioctl_destroy_free_list() - IOCTL to destroy a free list
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
+ *                 &struct drm_pvr_ioctl_destroy_free_list_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_DESTROY_FREE_LIST.
+ *
+ * Return:
+ *  * 0 on success, or
+ *  * -%EINVAL if free list not in object list.
+ */
+static int
+pvr_ioctl_destroy_free_list(struct drm_device *drm_dev, void *raw_args,
+			    struct drm_file *file)
+{
+	struct drm_pvr_ioctl_destroy_free_list_args *args = raw_args;
+	struct pvr_file *pvr_file = to_pvr_file(file);
+	struct pvr_free_list *free_list;
+
+	if (args->_padding_4)
+		return -EINVAL;
+
+	free_list = xa_erase(&pvr_file->free_list_handles, args->handle);
+	if (!free_list)
+		return -EINVAL;
+
+	pvr_free_list_put(free_list);
+	return 0;
+}
+
+/**
+ * pvr_ioctl_create_hwrt_dataset() - IOCTL to create a HWRT dataset
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ *                     &struct drm_pvr_ioctl_create_hwrt_dataset_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_CREATE_HWRT_DATASET.
+ *
+ * Return:
+ *  * 0 on success, or
+ *  * Any error returned by pvr_hwrt_dataset_create().
+ */
+static int
+pvr_ioctl_create_hwrt_dataset(struct drm_device *drm_dev, void *raw_args,
+			      struct drm_file *file)
+{
+	struct drm_pvr_ioctl_create_hwrt_dataset_args *args = raw_args;
+	struct pvr_file *pvr_file = to_pvr_file(file);
+	struct pvr_hwrt_dataset *hwrt;
+	int idx;
+	int err;
+
+	if (!drm_dev_enter(drm_dev, &idx))
+		return -EIO;
+
+	hwrt = pvr_hwrt_dataset_create(pvr_file, args);
+	if (IS_ERR(hwrt)) {
+		err = PTR_ERR(hwrt);
+		goto err_drm_dev_exit;
+	}
+
+	/* Allocate object handle for userspace. */
+	err = xa_alloc(&pvr_file->hwrt_handles,
+		       &args->handle,
+		       hwrt,
+		       xa_limit_32b,
+		       GFP_KERNEL);
+	if (err < 0)
+		goto err_cleanup;
+
+	drm_dev_exit(idx);
+
+	return 0;
+
+err_cleanup:
+	pvr_hwrt_dataset_put(hwrt);
+
+err_drm_dev_exit:
+	drm_dev_exit(idx);
+
+	return err;
+}
+
+/**
+ * pvr_ioctl_destroy_hwrt_dataset() - IOCTL to destroy a HWRT dataset
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
+ *                 &struct drm_pvr_ioctl_destroy_hwrt_dataset_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_DESTROY_HWRT_DATASET.
+ *
+ * Return:
+ *  * 0 on success, or
+ *  * -%EINVAL if HWRT dataset not in object list.
+ */
+static int
+pvr_ioctl_destroy_hwrt_dataset(struct drm_device *drm_dev, void *raw_args,
+			       struct drm_file *file)
+{
+	struct drm_pvr_ioctl_destroy_hwrt_dataset_args *args = raw_args;
+	struct pvr_file *pvr_file = to_pvr_file(file);
+	struct pvr_hwrt_dataset *hwrt;
+
+	if (args->_padding_4)
+		return -EINVAL;
+
+	hwrt = xa_erase(&pvr_file->hwrt_handles, args->handle);
+	if (!hwrt)
+		return -EINVAL;
+
+	pvr_hwrt_dataset_put(hwrt);
+	return 0;
+}
+
+/**
+ * pvr_ioctl_create_vm_context() - IOCTL to create a VM context
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ *                     &struct drm_pvr_ioctl_create_vm_context_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_CREATE_VM_CONTEXT.
+ *
+ * Return:
+ *  * 0 on success, or
+ *  * Any error returned by pvr_vm_create_context().
+ */
+static int
+pvr_ioctl_create_vm_context(struct drm_device *drm_dev, void *raw_args,
+			    struct drm_file *file)
+{
+	struct drm_pvr_ioctl_create_vm_context_args *args = raw_args;
+	struct pvr_file *pvr_file = to_pvr_file(file);
+	struct pvr_vm_context *vm_ctx;
+	int idx;
+	int err;
+
+	if (!drm_dev_enter(drm_dev, &idx))
+		return -EIO;
+
+	if (args->_padding_4) {
+		err = -EINVAL;
+		goto err_drm_dev_exit;
+	}
+
+	vm_ctx = pvr_vm_create_context(pvr_file->pvr_dev, true);
+	if (IS_ERR(vm_ctx)) {
+		err = PTR_ERR(vm_ctx);
+		goto err_drm_dev_exit;
+	}
+
+	/* Allocate object handle for userspace. */
+	err = xa_alloc(&pvr_file->vm_ctx_handles,
+		       &args->handle,
+		       vm_ctx,
+		       xa_limit_32b,
+		       GFP_KERNEL);
+	if (err < 0)
+		goto err_cleanup;
+
+	drm_dev_exit(idx);
+
+	return 0;
+
+err_cleanup:
+	pvr_vm_context_put(vm_ctx);
+
+err_drm_dev_exit:
+	drm_dev_exit(idx);
+
+	return err;
+}
+
+/**
+ * pvr_ioctl_destroy_vm_context() - IOCTL to destroy a VM context
+* @drm_dev: [IN] DRM device.
+* @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
+*                 &struct drm_pvr_ioctl_destroy_vm_context_args.
+* @file: [IN] DRM file private data.
+*
+* Called from userspace with %DRM_IOCTL_PVR_DESTROY_VM_CONTEXT.
+*
+* Return:
+*  * 0 on success, or
+*  * -%EINVAL if object not in object list.
+ */
+static int
+pvr_ioctl_destroy_vm_context(struct drm_device *drm_dev, void *raw_args,
+			     struct drm_file *file)
+{
+	struct drm_pvr_ioctl_destroy_vm_context_args *args = raw_args;
+	struct pvr_file *pvr_file = to_pvr_file(file);
+	struct pvr_vm_context *vm_ctx;
+
+	if (args->_padding_4)
+		return -EINVAL;
+
+	vm_ctx = xa_erase(&pvr_file->vm_ctx_handles, args->handle);
+	if (!vm_ctx)
+		return -EINVAL;
+
+	pvr_vm_context_put(vm_ctx);
+	return 0;
+}
+
+/**
+ * pvr_ioctl_vm_map() - IOCTL to map buffer to GPU address space.
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
+ *                 &struct drm_pvr_ioctl_vm_map_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_VM_MAP.
+ *
+ * Return:
+ *  * 0 on success,
+ *  * -%EINVAL if &drm_pvr_ioctl_vm_op_map_args.flags is not zero,
+ *  * -%EINVAL if the bounds specified by &drm_pvr_ioctl_vm_op_map_args.offset
+ *    and &drm_pvr_ioctl_vm_op_map_args.size are not valid or do not fall
+ *    within the buffer object specified by
+ *    &drm_pvr_ioctl_vm_op_map_args.handle,
+ *  * -%EINVAL if the bounds specified by
+ *    &drm_pvr_ioctl_vm_op_map_args.device_addr and
+ *    &drm_pvr_ioctl_vm_op_map_args.size do not form a valid device-virtual
+ *    address range which falls entirely within a single heap, or
+ *  * -%ENOENT if &drm_pvr_ioctl_vm_op_map_args.handle does not refer to a
+ *    valid PowerVR buffer object.
+ */
+static int
+pvr_ioctl_vm_map(struct drm_device *drm_dev, void *raw_args,
+		 struct drm_file *file)
+{
+	struct pvr_device *pvr_dev = to_pvr_device(drm_dev);
+	struct drm_pvr_ioctl_vm_map_args *args = raw_args;
+	struct pvr_file *pvr_file = to_pvr_file(file);
+	struct pvr_vm_context *vm_ctx;
+
+	struct pvr_gem_object *pvr_obj;
+	size_t pvr_obj_size;
+
+	u64 offset_plus_size;
+	int idx;
+	int err;
+
+	if (!drm_dev_enter(drm_dev, &idx))
+		return -EIO;
+
+	/* Initial validation of args. */
+	if (args->_padding_14) {
+		err = -EINVAL;
+		goto err_drm_dev_exit;
+	}
+
+	if (args->flags != 0 ||
+	    check_add_overflow(args->offset, args->size, &offset_plus_size) ||
+	    !pvr_find_heap_containing(pvr_dev, args->device_addr, args->size)) {
+		err = -EINVAL;
+		goto err_drm_dev_exit;
+	}
+
+	vm_ctx = pvr_vm_context_lookup(pvr_file, args->vm_context_handle);
+	if (!vm_ctx) {
+		err = -EINVAL;
+		goto err_drm_dev_exit;
+	}
+
+	pvr_obj = pvr_gem_object_from_handle(pvr_file, args->handle);
+	if (!pvr_obj) {
+		err = -ENOENT;
+		goto err_put_vm_context;
+	}
+
+	pvr_obj_size = pvr_gem_object_size(pvr_obj);
+
+	/*
+	 * Validate offset and size args. The alignment of these will be
+	 * checked when mapping; for now just check that they're within valid
+	 * bounds
+	 */
+	if (args->offset >= pvr_obj_size || offset_plus_size > pvr_obj_size) {
+		err = -EINVAL;
+		goto err_put_pvr_object;
+	}
+
+	err = pvr_vm_map(vm_ctx, pvr_obj, args->offset,
+			 args->device_addr, args->size);
+	if (err)
+		goto err_put_pvr_object;
+
+	/*
+	 * In order to set up the mapping, we needed a reference to &pvr_obj.
+	 * However, pvr_vm_map() obtains and stores its own reference, so we
+	 * must release ours before returning.
+	 */
+
+err_put_pvr_object:
+	pvr_gem_object_put(pvr_obj);
+
+err_put_vm_context:
+	pvr_vm_context_put(vm_ctx);
+
+err_drm_dev_exit:
+	drm_dev_exit(idx);
+
+	return err;
+}
+
+/**
+ * pvr_ioctl_vm_unmap() - IOCTL to unmap buffer from GPU address space.
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
+ *                 &struct drm_pvr_ioctl_vm_unmap_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_VM_UNMAP.
+ *
+ * Return:
+ *  * 0 on success,
+ *  * -%EINVAL if &drm_pvr_ioctl_vm_op_unmap_args.device_addr is not a valid
+ *    device page-aligned device-virtual address, or
+ *  * -%ENOENT if there is currently no PowerVR buffer object mapped at
+ *    &drm_pvr_ioctl_vm_op_unmap_args.device_addr.
+ */
+static int
+pvr_ioctl_vm_unmap(struct drm_device *drm_dev, void *raw_args,
+		   struct drm_file *file)
+{
+	struct drm_pvr_ioctl_vm_unmap_args *args = raw_args;
+	struct pvr_file *pvr_file = to_pvr_file(file);
+	struct pvr_vm_context *vm_ctx;
+	int err;
+
+	/* Initial validation of args. */
+	if (args->_padding_4)
+		return -EINVAL;
+
+	vm_ctx = pvr_vm_context_lookup(pvr_file, args->vm_context_handle);
+	if (!vm_ctx)
+		return -EINVAL;
+
+	err = pvr_vm_unmap(vm_ctx, args->device_addr, args->size);
+
+	pvr_vm_context_put(vm_ctx);
+
+	return err;
+}
+
+/*
+ * pvr_ioctl_submit_job() - IOCTL to submit a job to the GPU
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
+ *                 &struct drm_pvr_ioctl_submit_job_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_SUBMIT_JOB.
+ *
+ * Return:
+ *  * 0 on success, or
+ *  * -%EINVAL if arguments are invalid.
+ */
+static int
+pvr_ioctl_submit_jobs(struct drm_device *drm_dev, void *raw_args,
+		      struct drm_file *file)
+{
+	struct drm_pvr_ioctl_submit_jobs_args *args = raw_args;
+	struct pvr_device *pvr_dev = to_pvr_device(drm_dev);
+	struct pvr_file *pvr_file = to_pvr_file(file);
+	int idx;
+	int err;
+
+	if (!drm_dev_enter(drm_dev, &idx))
+		return -EIO;
+
+	err = pvr_submit_jobs(pvr_dev, pvr_file, args);
+
+	drm_dev_exit(idx);
+
+	return err;
+}
+
+int
+pvr_get_uobj(u64 usr_ptr, u32 usr_stride, u32 min_stride, u32 obj_size, void *out)
+{
+	if (usr_stride < min_stride)
+		return -EINVAL;
+
+	return copy_struct_from_user(out, obj_size, u64_to_user_ptr(usr_ptr), usr_stride);
+}
+
+int
+pvr_set_uobj(u64 usr_ptr, u32 usr_stride, u32 min_stride, u32 obj_size, const void *in)
+{
+	if (usr_stride < min_stride)
+		return -EINVAL;
+
+	if (copy_to_user(u64_to_user_ptr(usr_ptr), in, min_t(u32, usr_stride, obj_size)))
+		return -EFAULT;
+
+	if (usr_stride > obj_size &&
+	    clear_user(u64_to_user_ptr(usr_ptr + obj_size), usr_stride - obj_size)) {
+		return -EFAULT;
+	}
+
+	return 0;
+}
+
+int
+pvr_get_uobj_array(const struct drm_pvr_obj_array *in, u32 min_stride, u32 obj_size, void **out)
+{
+	int ret = 0;
+	void *out_alloc;
+
+	if (in->stride < min_stride)
+		return -EINVAL;
+
+	if (!in->count)
+		return 0;
+
+	out_alloc = kvmalloc_array(in->count, obj_size, GFP_KERNEL);
+	if (!out_alloc)
+		return -ENOMEM;
+
+	if (obj_size == in->stride) {
+		if (copy_from_user(out_alloc, u64_to_user_ptr(in->array),
+				   (unsigned long)obj_size * in->count))
+			ret = -EFAULT;
+	} else {
+		void __user *in_ptr = u64_to_user_ptr(in->array);
+		void *out_ptr = out_alloc;
+
+		for (u32 i = 0; i < in->count; i++) {
+			ret = copy_struct_from_user(out_ptr, obj_size, in_ptr, in->stride);
+			if (ret)
+				break;
+
+			out_ptr += obj_size;
+			in_ptr += in->stride;
+		}
+	}
+
+	if (ret) {
+		kvfree(out_alloc);
+		return ret;
+	}
+
+	*out = out_alloc;
+	return 0;
+}
+
+int
+pvr_set_uobj_array(const struct drm_pvr_obj_array *out, u32 min_stride, u32 obj_size,
+		   const void *in)
+{
+	if (out->stride < min_stride)
+		return -EINVAL;
+
+	if (!out->count)
+		return 0;
+
+	if (obj_size == out->stride) {
+		if (copy_to_user(u64_to_user_ptr(out->array), in,
+				 (unsigned long)obj_size * out->count))
+			return -EFAULT;
+	} else {
+		u32 cpy_elem_size = min_t(u32, out->stride, obj_size);
+		void __user *out_ptr = u64_to_user_ptr(out->array);
+		const void *in_ptr = in;
+
+		for (u32 i = 0; i < out->count; i++) {
+			if (copy_to_user(out_ptr, in_ptr, cpy_elem_size))
+				return -EFAULT;
+
+			out_ptr += obj_size;
+			in_ptr += out->stride;
+		}
+
+		if (out->stride > obj_size &&
+		    clear_user(u64_to_user_ptr(out->array + obj_size),
+			       out->stride - obj_size)) {
+			return -EFAULT;
+		}
+	}
+
+	return 0;
+}
+
+#define DRM_PVR_IOCTL(_name, _func, _flags) \
+	DRM_IOCTL_DEF_DRV(PVR_##_name, pvr_ioctl_##_func, _flags)
+
+/* clang-format off */
+
+static const struct drm_ioctl_desc pvr_drm_driver_ioctls[] = {
+	DRM_PVR_IOCTL(DEV_QUERY, dev_query, DRM_RENDER_ALLOW),
+	DRM_PVR_IOCTL(CREATE_BO, create_bo, DRM_RENDER_ALLOW),
+	DRM_PVR_IOCTL(GET_BO_MMAP_OFFSET, get_bo_mmap_offset, DRM_RENDER_ALLOW),
+	DRM_PVR_IOCTL(CREATE_VM_CONTEXT, create_vm_context, DRM_RENDER_ALLOW),
+	DRM_PVR_IOCTL(DESTROY_VM_CONTEXT, destroy_vm_context, DRM_RENDER_ALLOW),
+	DRM_PVR_IOCTL(VM_MAP, vm_map, DRM_RENDER_ALLOW),
+	DRM_PVR_IOCTL(VM_UNMAP, vm_unmap, DRM_RENDER_ALLOW),
+	DRM_PVR_IOCTL(CREATE_CONTEXT, create_context, DRM_RENDER_ALLOW),
+	DRM_PVR_IOCTL(DESTROY_CONTEXT, destroy_context, DRM_RENDER_ALLOW),
+	DRM_PVR_IOCTL(CREATE_FREE_LIST, create_free_list, DRM_RENDER_ALLOW),
+	DRM_PVR_IOCTL(DESTROY_FREE_LIST, destroy_free_list, DRM_RENDER_ALLOW),
+	DRM_PVR_IOCTL(CREATE_HWRT_DATASET, create_hwrt_dataset, DRM_RENDER_ALLOW),
+	DRM_PVR_IOCTL(DESTROY_HWRT_DATASET, destroy_hwrt_dataset, DRM_RENDER_ALLOW),
+	DRM_PVR_IOCTL(SUBMIT_JOBS, submit_jobs, DRM_RENDER_ALLOW),
+};
+
+/* clang-format on */
+
+#undef DRM_PVR_IOCTL
+
+/**
+ * pvr_drm_driver_open() - Driver callback when a new &struct drm_file is opened
+ * @drm_dev: [IN] DRM device.
+ * @file: [IN] DRM file private data.
+ *
+ * Allocates powervr-specific file private data (&struct pvr_file).
+ *
+ * Registered in &pvr_drm_driver.
+ *
+ * Return:
+ *  * 0 on success,
+ *  * -%ENOMEM if the allocation of a &struct ipvr_file fails, or
+ *  * Any error returned by pvr_memory_context_init().
+ */
+static int
+pvr_drm_driver_open(struct drm_device *drm_dev, struct drm_file *file)
+{
+	struct pvr_device *pvr_dev = to_pvr_device(drm_dev);
+	struct pvr_file *pvr_file;
+
+	pvr_file = kzalloc(sizeof(*pvr_file), GFP_KERNEL);
+	if (!pvr_file)
+		return -ENOMEM;
+
+	/*
+	 * Store reference to base DRM file private data for use by
+	 * from_pvr_file.
+	 */
+	pvr_file->file = file;
+
+	/*
+	 * Store reference to powervr-specific outer device struct in file
+	 * private data for convenient access.
+	 */
+	pvr_file->pvr_dev = pvr_dev;
+
+	xa_init_flags(&pvr_file->ctx_handles, XA_FLAGS_ALLOC1);
+	xa_init_flags(&pvr_file->free_list_handles, XA_FLAGS_ALLOC1);
+	xa_init_flags(&pvr_file->hwrt_handles, XA_FLAGS_ALLOC1);
+	xa_init_flags(&pvr_file->vm_ctx_handles, XA_FLAGS_ALLOC1);
+
+	/*
+	 * Store reference to powervr-specific file private data in DRM file
+	 * private data.
+	 */
+	file->driver_priv = pvr_file;
+
+	return 0;
+}
+
+/**
+ * pvr_drm_driver_postclose() - One of the driver callbacks when a &struct
+ * drm_file is closed.
+ * @drm_dev: [IN] DRM device (unused).
+ * @file: [IN] DRM file private data.
+ *
+ * Frees powervr-specific file private data (&struct pvr_file).
+ *
+ * Registered in &pvr_drm_driver.
+ */
+static void
+pvr_drm_driver_postclose(__always_unused struct drm_device *drm_dev,
+			 struct drm_file *file)
+{
+	struct pvr_file *pvr_file = to_pvr_file(file);
+
+	/* Kill remaining contexts. */
+	pvr_destroy_contexts_for_file(pvr_file);
+
+	/* Drop references on any remaining objects. */
+	pvr_destroy_free_lists_for_file(pvr_file);
+	pvr_destroy_hwrt_datasets_for_file(pvr_file);
+	pvr_destroy_vm_contexts_for_file(pvr_file);
+
+	kfree(pvr_file);
+	file->driver_priv = NULL;
+}
+
+DEFINE_DRM_GEM_FOPS(pvr_drm_driver_fops);
+
+static struct drm_driver pvr_drm_driver = {
+	.driver_features = DRIVER_GEM | DRIVER_GEM_GPUVA | DRIVER_RENDER |
+			   DRIVER_SYNCOBJ | DRIVER_SYNCOBJ_TIMELINE,
+	.open = pvr_drm_driver_open,
+	.postclose = pvr_drm_driver_postclose,
+	.ioctls = pvr_drm_driver_ioctls,
+	.num_ioctls = ARRAY_SIZE(pvr_drm_driver_ioctls),
+	.fops = &pvr_drm_driver_fops,
+#if defined(CONFIG_DEBUG_FS)
+	.debugfs_init = pvr_debugfs_init,
+#endif
+
+	.name = PVR_DRIVER_NAME,
+	.desc = PVR_DRIVER_DESC,
+	.date = PVR_DRIVER_DATE,
+	.major = PVR_DRIVER_MAJOR,
+	.minor = PVR_DRIVER_MINOR,
+	.patchlevel = PVR_DRIVER_PATCHLEVEL,
+
+	.gem_prime_import_sg_table = drm_gem_shmem_prime_import_sg_table,
+	.gem_create_object = pvr_gem_create_object,
+};
+
+static int
+pvr_probe(struct platform_device *plat_dev)
+{
+	struct pvr_device *pvr_dev;
+	struct drm_device *drm_dev;
+	int err;
+
+	pvr_dev = devm_drm_dev_alloc(&plat_dev->dev, &pvr_drm_driver,
+				     struct pvr_device, base);
+	if (IS_ERR(pvr_dev))
+		return PTR_ERR(pvr_dev);
+
+	drm_dev = &pvr_dev->base;
+
+	platform_set_drvdata(plat_dev, drm_dev);
+
+	init_rwsem(&pvr_dev->reset_sem);
+
+	pvr_context_device_init(pvr_dev);
+
+	err = pvr_queue_device_init(pvr_dev);
+	if (err)
+		goto err_context_fini;
+
+	devm_pm_runtime_enable(&plat_dev->dev);
+	pm_runtime_mark_last_busy(&plat_dev->dev);
+
+	pm_runtime_set_autosuspend_delay(&plat_dev->dev, 50);
+	pm_runtime_use_autosuspend(&plat_dev->dev);
+	pvr_watchdog_init(pvr_dev);
+
+	err = pvr_device_init(pvr_dev);
+	if (err)
+		goto err_watchdog_fini;
+
+	err = drm_dev_register(drm_dev, 0);
+	if (err)
+		goto err_device_fini;
+
+	xa_init_flags(&pvr_dev->free_list_ids, XA_FLAGS_ALLOC1);
+	xa_init_flags(&pvr_dev->job_ids, XA_FLAGS_ALLOC1);
+
+	return 0;
+
+err_device_fini:
+	pvr_device_fini(pvr_dev);
+
+err_watchdog_fini:
+	pvr_watchdog_fini(pvr_dev);
+
+	pvr_queue_device_fini(pvr_dev);
+
+err_context_fini:
+	pvr_context_device_fini(pvr_dev);
+
+	return err;
+}
+
+static int
+pvr_remove(struct platform_device *plat_dev)
+{
+	struct drm_device *drm_dev = platform_get_drvdata(plat_dev);
+	struct pvr_device *pvr_dev = to_pvr_device(drm_dev);
+
+	WARN_ON(!xa_empty(&pvr_dev->job_ids));
+	WARN_ON(!xa_empty(&pvr_dev->free_list_ids));
+
+	xa_destroy(&pvr_dev->job_ids);
+	xa_destroy(&pvr_dev->free_list_ids);
+
+	pm_runtime_suspend(drm_dev->dev);
+	pvr_device_fini(pvr_dev);
+	drm_dev_unplug(drm_dev);
+	pvr_watchdog_fini(pvr_dev);
+	pvr_queue_device_fini(pvr_dev);
+	pvr_context_device_fini(pvr_dev);
+
+	return 0;
+}
+
+static const struct of_device_id dt_match[] = {
+	{ .compatible = "img,img-axe", .data = NULL },
+	{}
+};
+MODULE_DEVICE_TABLE(of, dt_match);
+
+static const struct dev_pm_ops pvr_pm_ops = {
+	RUNTIME_PM_OPS(pvr_power_device_suspend, pvr_power_device_resume, pvr_power_device_idle)
+};
+
+static struct platform_driver pvr_driver = {
+	.probe = pvr_probe,
+	.remove = pvr_remove,
+	.driver = {
+		.name = PVR_DRIVER_NAME,
+		.pm = &pvr_pm_ops,
+		.of_match_table = dt_match,
+	},
+};
+module_platform_driver(pvr_driver);
+
+MODULE_AUTHOR("Imagination Technologies Ltd.");
+MODULE_DESCRIPTION(PVR_DRIVER_DESC);
+MODULE_LICENSE("Dual MIT/GPL");
+MODULE_IMPORT_NS(DMA_BUF);
+MODULE_FIRMWARE("powervr/rogue_33.15.11.3_v1.fw");