diff options
Diffstat (limited to 'drivers/gpu/drm/imagination/pvr_drv.h')
| -rw-r--r-- | drivers/gpu/drm/imagination/pvr_drv.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imagination/pvr_drv.h b/drivers/gpu/drm/imagination/pvr_drv.h new file mode 100644 index 000000000000..378fe477b759 --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_drv.h @@ -0,0 +1,129 @@ +/* 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 + +int pvr_get_uobj(u64 usr_ptr, u32 usr_size, u32 min_size, u32 obj_size, void *out); +int pvr_set_uobj(u64 usr_ptr, u32 usr_size, u32 min_size, u32 obj_size, const void *in); +int pvr_get_uobj_array(const struct drm_pvr_obj_array *in, u32 min_stride, u32 obj_size, + void **out); +int pvr_set_uobj_array(const struct drm_pvr_obj_array *out, u32 min_stride, u32 obj_size, + const void *in); + +#define PVR_UOBJ_MIN_SIZE_INTERNAL(_typename, _last_mandatory_field) \ + (offsetof(_typename, _last_mandatory_field) + \ + sizeof(((_typename *)NULL)->_last_mandatory_field)) + +/* NOLINTBEGIN(bugprone-macro-parentheses) */ +#define PVR_UOBJ_DECL(_typename, _last_mandatory_field) \ + , _typename : PVR_UOBJ_MIN_SIZE_INTERNAL(_typename, _last_mandatory_field) +/* NOLINTEND(bugprone-macro-parentheses) */ + +/** + * DOC: PVR user objects. + * + * Macros used to aid copying structured and array data to and from + * userspace. Objects can differ in size, provided the minimum size + * allowed is specified (using the last mandatory field in the struct). + * All types used with PVR_UOBJ_GET/SET macros must be listed here under + * PVR_UOBJ_MIN_SIZE, with the last mandatory struct field specified. + */ + +/** + * PVR_UOBJ_MIN_SIZE() - Fetch the minimum copy size of a compatible type object. + * @_obj_name: The name of the object. Cannot be a typename - this is deduced. + * + * This cannot fail. Using the macro with an incompatible type will result in a + * compiler error. + * + * To add compatibility for a type, list it within the macro in an orderly + * fashion. The second argument is the name of the last mandatory field of the + * struct type, which is used to calculate the size. See also PVR_UOBJ_DECL(). + * + * Return: The minimum copy size. + */ +#define PVR_UOBJ_MIN_SIZE(_obj_name) _Generic(_obj_name \ + PVR_UOBJ_DECL(struct drm_pvr_job, hwrt) \ + PVR_UOBJ_DECL(struct drm_pvr_sync_op, value) \ + PVR_UOBJ_DECL(struct drm_pvr_dev_query_gpu_info, num_phantoms) \ + PVR_UOBJ_DECL(struct drm_pvr_dev_query_runtime_info, cdm_max_local_mem_size_regs) \ + PVR_UOBJ_DECL(struct drm_pvr_dev_query_quirks, _padding_c) \ + PVR_UOBJ_DECL(struct drm_pvr_dev_query_enhancements, _padding_c) \ + PVR_UOBJ_DECL(struct drm_pvr_heap, page_size_log2) \ + PVR_UOBJ_DECL(struct drm_pvr_dev_query_heap_info, heaps) \ + PVR_UOBJ_DECL(struct drm_pvr_static_data_area, offset) \ + PVR_UOBJ_DECL(struct drm_pvr_dev_query_static_data_areas, static_data_areas) \ + ) + +/** + * PVR_UOBJ_GET() - Copies from _src_usr_ptr to &_dest_obj. + * @_dest_obj: The destination container object in kernel space. + * @_usr_size: The size of the source container in user space. + * @_src_usr_ptr: __u64 raw pointer to the source container in user space. + * + * Return: Error code. See pvr_get_uobj(). + */ +#define PVR_UOBJ_GET(_dest_obj, _usr_size, _src_usr_ptr) \ + pvr_get_uobj(_src_usr_ptr, _usr_size, \ + PVR_UOBJ_MIN_SIZE(_dest_obj), \ + sizeof(_dest_obj), &(_dest_obj)) + +/** + * PVR_UOBJ_SET() - Copies from &_src_obj to _dest_usr_ptr. + * @_dest_usr_ptr: __u64 raw pointer to the destination container in user space. + * @_usr_size: The size of the destination container in user space. + * @_src_obj: The source container object in kernel space. + * + * Return: Error code. See pvr_set_uobj(). + */ +#define PVR_UOBJ_SET(_dest_usr_ptr, _usr_size, _src_obj) \ + pvr_set_uobj(_dest_usr_ptr, _usr_size, \ + PVR_UOBJ_MIN_SIZE(_src_obj), \ + sizeof(_src_obj), &(_src_obj)) + +/** + * PVR_UOBJ_GET_ARRAY() - Copies from @_src_drm_pvr_obj_array.array to + * alloced memory and returns a pointer in _dest_array. + * @_dest_array: The destination C array object in kernel space. + * @_src_drm_pvr_obj_array: The &struct drm_pvr_obj_array containing a __u64 raw + * pointer to the source C array in user space and the size of each array + * element in user space (the 'stride'). + * + * Return: Error code. See pvr_get_uobj_array(). + */ +#define PVR_UOBJ_GET_ARRAY(_dest_array, _src_drm_pvr_obj_array) \ + pvr_get_uobj_array(_src_drm_pvr_obj_array, \ + PVR_UOBJ_MIN_SIZE((_dest_array)[0]), \ + sizeof((_dest_array)[0]), (void **)&(_dest_array)) + +/** + * PVR_UOBJ_SET_ARRAY() - Copies from _src_array to @_dest_drm_pvr_obj_array.array. + * @_dest_drm_pvr_obj_array: The &struct drm_pvr_obj_array containing a __u64 raw + * pointer to the destination C array in user space and the size of each array + * element in user space (the 'stride'). + * @_src_array: The source C array object in kernel space. + * + * Return: Error code. See pvr_set_uobj_array(). + */ +#define PVR_UOBJ_SET_ARRAY(_dest_drm_pvr_obj_array, _src_array) \ + pvr_set_uobj_array(_dest_drm_pvr_obj_array, \ + PVR_UOBJ_MIN_SIZE((_src_array)[0]), \ + sizeof((_src_array)[0]), _src_array) + +#endif /* PVR_DRV_H */ |