diff options
| -rw-r--r-- | MAINTAINERS | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/imagination/Kconfig | 15 | ||||
| -rw-r--r-- | drivers/gpu/drm/imagination/Makefile | 9 | ||||
| -rw-r--r-- | drivers/gpu/drm/imagination/pvr_device.h | 153 | ||||
| -rw-r--r-- | drivers/gpu/drm/imagination/pvr_drv.c | 509 | ||||
| -rw-r--r-- | drivers/gpu/drm/imagination/pvr_drv.h | 22 |
8 files changed, 712 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 37642011c319..debbc1956b8e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -10398,6 +10398,7 @@ M: Donald Robson <donald.robson@imgtec.com> M: Matt Coster <matt.coster@imgtec.com> S: Supported F: Documentation/devicetree/bindings/gpu/img,powervr.yaml +F: drivers/gpu/drm/imagination/ F: include/uapi/drm/pvr_drm.h IMON SOUNDGRAPH USB IR RECEIVER diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index cdbc56e07649..740c1c0bd068 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -394,6 +394,8 @@ source "drivers/gpu/drm/solomon/Kconfig" source "drivers/gpu/drm/sprd/Kconfig" +source "drivers/gpu/drm/imagination/Kconfig" + config DRM_HYPERV tristate "DRM Support for Hyper-V synthetic video device" depends on DRM && PCI && MMU && HYPERV diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index cdbe91ac0bfc..b4cb0835620a 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -199,3 +199,4 @@ obj-$(CONFIG_DRM_HYPERV) += hyperv/ obj-y += solomon/ obj-$(CONFIG_DRM_SPRD) += sprd/ obj-$(CONFIG_DRM_LOONGSON) += loongson/ +obj-$(CONFIG_DRM_POWERVR) += imagination/ diff --git a/drivers/gpu/drm/imagination/Kconfig b/drivers/gpu/drm/imagination/Kconfig new file mode 100644 index 000000000000..03d0a5031f5c --- /dev/null +++ b/drivers/gpu/drm/imagination/Kconfig @@ -0,0 +1,15 @@ +# SPDX-License-Identifier: GPL-2.0-only OR MIT +# Copyright (c) 2023 Imagination Technologies Ltd. + +config DRM_POWERVR + tristate "Imagination Technologies PowerVR (Series 6 and later) & IMG Graphics" + depends on ARM64 + depends on DRM + select DRM_GEM_SHMEM_HELPER + select DRM_SCHED + select FW_LOADER + help + Choose this option if you have a system that has an Imagination + Technologies PowerVR (Series 6 or later) or IMG GPU. + + If "M" is selected, the module will be called powervr. diff --git a/drivers/gpu/drm/imagination/Makefile b/drivers/gpu/drm/imagination/Makefile new file mode 100644 index 000000000000..f12a06ada9ec --- /dev/null +++ b/drivers/gpu/drm/imagination/Makefile @@ -0,0 +1,9 @@ +# SPDX-License-Identifier: GPL-2.0-only OR MIT +# Copyright (c) 2023 Imagination Technologies Ltd. + +subdir-ccflags-y := -I$(srctree)/$(src) + +powervr-y := \ + pvr_drv.o \ + +obj-$(CONFIG_DRM_POWERVR) += powervr.o diff --git a/drivers/gpu/drm/imagination/pvr_device.h b/drivers/gpu/drm/imagination/pvr_device.h new file mode 100644 index 000000000000..d3629164a629 --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_device.h @@ -0,0 +1,153 @@ +/* SPDX-License-Identifier: GPL-2.0-only OR MIT */ +/* Copyright (c) 2023 Imagination Technologies Ltd. */ + +#ifndef PVR_DEVICE_H +#define PVR_DEVICE_H + +#include <drm/drm_device.h> +#include <drm/drm_file.h> +#include <drm/drm_mm.h> + +#include <linux/bits.h> +#include <linux/compiler_attributes.h> +#include <linux/compiler_types.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/wait.h> + +/** + * struct pvr_device - powervr-specific wrapper for &struct drm_device + */ +struct pvr_device { + /** + * @base: The underlying &struct drm_device. + * + * Do not access this member directly, instead call + * from_pvr_device(). + */ + struct drm_device base; +}; + +/** + * struct pvr_file - powervr-specific data to be assigned to &struct + * drm_file.driver_priv + */ +struct pvr_file { + /** + * @file: A reference to the parent &struct drm_file. + * + * Do not access this member directly, instead call from_pvr_file(). + */ + struct drm_file *file; + + /** + * @pvr_dev: A reference to the powervr-specific wrapper for the + * associated device. Saves on repeated calls to + * to_pvr_device(). + */ + struct pvr_device *pvr_dev; +}; + +#define from_pvr_device(pvr_dev) (&(pvr_dev)->base) + +#define to_pvr_device(drm_dev) container_of_const(drm_dev, struct pvr_device, base) + +#define from_pvr_file(pvr_file) ((pvr_file)->file) + +#define to_pvr_file(file) ((file)->driver_priv) + +/** + * DOC: IOCTL validation helpers + * + * To validate the constraints imposed on IOCTL argument structs, a collection + * of macros and helper functions exist in ``pvr_device.h``. + * + * Of the current helpers, it should only be necessary to call + * PVR_IOCTL_UNION_PADDING_CHECK() directly. This macro should be used once in + * every code path which extracts a union member from a struct passed from + * userspace. + */ + +/** + * pvr_ioctl_union_padding_check() - Validate that the implicit padding between + * the end of a union member and the end of the union itself is zeroed. + * @instance: Pointer to the instance of the struct to validate. + * @union_offset: Offset into the type of @instance of the target union. Must + * be 64-bit aligned. + * @union_size: Size of the target union in the type of @instance. Must be + * 64-bit aligned. + * @member_size: Size of the target member in the target union specified by + * @union_offset and @union_size. It is assumed that the offset of the target + * member is zero relative to @union_offset. Must be 64-bit aligned. + * + * You probably want to use PVR_IOCTL_UNION_PADDING_CHECK() instead of calling + * this function directly, since that macro abstracts away much of the setup, + * and also provides some static validation. See its docs for details. + * + * Return: + * * %true if every byte between the end of the used member of the union and + * the end of that union is zeroed, or + * * %false otherwise. + */ +static __always_inline bool +pvr_ioctl_union_padding_check(void *instance, size_t union_offset, + size_t union_size, size_t member_size) +{ + /* + * void pointer arithmetic is technically illegal - cast to a byte + * pointer so this addition works safely. + */ + void *padding_start = ((u8 *)instance) + union_offset + member_size; + size_t padding_size = union_size - member_size; + + return !memchr_inv(padding_start, 0, padding_size); +} + +/** + * PVR_STATIC_ASSERT_64BIT_ALIGNED() - Inline assertion for 64-bit alignment. + * @static_expr_: Target expression to evaluate. + * + * If @static_expr_ does not evaluate to a constant integer which would be a + * 64-bit aligned address (i.e. a multiple of 8), compilation will fail. + * + * Return: + * The value of @static_expr_. + */ +#define PVR_STATIC_ASSERT_64BIT_ALIGNED(static_expr_) \ + ({ \ + static_assert(((static_expr_) & (sizeof(u64) - 1)) == 0); \ + (static_expr_); \ + }) + +/** + * PVR_IOCTL_UNION_PADDING_CHECK() - Validate that the implicit padding between + * the end of a union member and the end of the union itself is zeroed. + * @struct_instance_: An expression which evaluates to a pointer to a UAPI data + * struct. + * @union_: The name of the union member of @struct_instance_ to check. If the + * union member is nested within the type of @struct_instance_, this may + * contain the member access operator ("."). + * @member_: The name of the member of @union_ to assess. + * + * This is a wrapper around pvr_ioctl_union_padding_check() which performs + * alignment checks and simplifies things for the caller. + * + * Return: + * * %true if every byte in @struct_instance_ between the end of @member_ and + * the end of @union_ is zeroed, or + * * %false otherwise. + */ +#define PVR_IOCTL_UNION_PADDING_CHECK(struct_instance_, union_, member_) \ + ({ \ + typeof(struct_instance_) __instance = (struct_instance_); \ + size_t __union_offset = PVR_STATIC_ASSERT_64BIT_ALIGNED( \ + offsetof(typeof(*__instance), union_)); \ + size_t __union_size = PVR_STATIC_ASSERT_64BIT_ALIGNED( \ + sizeof(__instance->union_)); \ + size_t __member_size = PVR_STATIC_ASSERT_64BIT_ALIGNED( \ + sizeof(__instance->union_.member_)); \ + pvr_ioctl_union_padding_check(__instance, __union_offset, \ + __union_size, __member_size); \ + }) + +#endif /* PVR_DEVICE_H */ diff --git a/drivers/gpu/drm/imagination/pvr_drv.c b/drivers/gpu/drm/imagination/pvr_drv.c new file mode 100644 index 000000000000..3d4f2ba2c015 --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_drv.c @@ -0,0 +1,509 @@ +// SPDX-License-Identifier: GPL-2.0-only OR MIT +/* Copyright (c) 2023 Imagination Technologies Ltd. */ + +#include "pvr_device.h" +#include "pvr_drv.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> + +/** + * 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) +{ + return -ENOTTY; +} + +/** + * 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) +{ + return -ENOTTY; +} + +/** + * 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) +{ + return -ENOTTY; +} + +/** + * 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) +{ + return -ENOTTY; +} + +/** + * 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) +{ + return -ENOTTY; +} + +/** + * 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) +{ + return -ENOTTY; +} + +/** + * 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) +{ + return -ENOTTY; +} + +/** + * 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) +{ + return -ENOTTY; +} + +/** + * 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) +{ + return -ENOTTY; +} + +/** + * 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) +{ + return -ENOTTY; +} + +/** + * 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) +{ + return -ENOTTY; +} + +/** + * 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) +{ + return -ENOTTY; +} + +/** + * 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) +{ + return -ENOTTY; +} + +/* + * 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) +{ + return -ENOTTY; +} + +#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; + + /* + * 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); + + 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_RENDER, + .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, + + .name = PVR_DRIVER_NAME, + .desc = PVR_DRIVER_DESC, + .date = PVR_DRIVER_DATE, + .major = PVR_DRIVER_MAJOR, + .minor = PVR_DRIVER_MINOR, + .patchlevel = PVR_DRIVER_PATCHLEVEL, + +}; + +static int +pvr_probe(struct platform_device *plat_dev) +{ + struct pvr_device *pvr_dev; + struct drm_device *drm_dev; + + 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); + + return drm_dev_register(drm_dev, 0); +} + +static int +pvr_remove(struct platform_device *plat_dev) +{ + struct drm_device *drm_dev = platform_get_drvdata(plat_dev); + + drm_dev_unplug(drm_dev); + + return 0; +} + +static const struct of_device_id dt_match[] = { + { .compatible = "img,img-axe", .data = NULL }, + {} +}; +MODULE_DEVICE_TABLE(of, dt_match); + +static struct platform_driver pvr_driver = { + .probe = pvr_probe, + .remove = pvr_remove, + .driver = { + .name = PVR_DRIVER_NAME, + .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); diff --git a/drivers/gpu/drm/imagination/pvr_drv.h b/drivers/gpu/drm/imagination/pvr_drv.h new file mode 100644 index 000000000000..c29d11af88fe --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_drv.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0-only OR MIT */ +/* Copyright (c) 2023 Imagination Technologies Ltd. */ + +#ifndef PVR_DRV_H +#define PVR_DRV_H + +#include "linux/compiler_attributes.h" +#include <uapi/drm/pvr_drm.h> + +#define PVR_DRIVER_NAME "powervr" +#define PVR_DRIVER_DESC "Imagination PowerVR (Series 6 and later) & IMG Graphics" +#define PVR_DRIVER_DATE "20230904" + +/* + * Driver interface version: + * - 1.0: Initial interface + */ +#define PVR_DRIVER_MAJOR 1 +#define PVR_DRIVER_MINOR 0 +#define PVR_DRIVER_PATCHLEVEL 0 + +#endif /* PVR_DRV_H */ |