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1// SPDX-License-Identifier: GPL-2.0-only OR MIT2/* Copyright (c) 2023 Imagination Technologies Ltd. */3 4#include "pvr_params.h"5 6#include <linux/cache.h>7#include <linux/moduleparam.h>8 9static struct pvr_device_params pvr_device_param_defaults __read_mostly = {10#define X(type_, name_, value_, desc_, ...) .name_ = (value_),11 PVR_DEVICE_PARAMS12#undef X13};14 15#define PVR_DEVICE_PARAM_NAMED(name_, type_, desc_) \16 module_param_named(name_, pvr_device_param_defaults.name_, type_, \17 0400); \18 MODULE_PARM_DESC(name_, desc_);19 20/*21 * This list of defines must contain every type specified in "pvr_params.h" as22 * ``PVR_PARAM_TYPE_*_C``.23 */24#define PVR_PARAM_TYPE_X32_MODPARAM uint25 26#define X(type_, name_, value_, desc_, ...) \27 PVR_DEVICE_PARAM_NAMED(name_, PVR_PARAM_TYPE_##type_##_MODPARAM, desc_);28PVR_DEVICE_PARAMS29#undef X30 31int32pvr_device_params_init(struct pvr_device_params *params)33{34 /*35 * If heap-allocated parameters are added in the future (e.g.36 * modparam's charp type), they must be handled specially here (via37 * kstrdup() in the case of charp). Since that's not necessary yet,38 * a straight copy will do for now. This change will also require a39 * pvr_device_params_fini() function to free any heap-allocated copies.40 */41 42 *params = pvr_device_param_defaults;43 44 return 0;45}46 47#if defined(CONFIG_DEBUG_FS)48#include "pvr_device.h"49 50#include <linux/dcache.h>51#include <linux/debugfs.h>52#include <linux/export.h>53#include <linux/fs.h>54#include <linux/stddef.h>55 56/*57 * This list of defines must contain every type specified in "pvr_params.h" as58 * ``PVR_PARAM_TYPE_*_C``.59 */60#define PVR_PARAM_TYPE_X32_FMT "0x%08llx"61 62#define X_SET(name_, mode_) X_SET_##mode_(name_)63#define X_SET_DEF(name_, update_, mode_) X_SET_DEF_##mode_(name_, update_)64 65#define X_SET_RO(name_) NULL66#define X_SET_RW(name_) __pvr_device_param_##name_##set67 68#define X_SET_DEF_RO(name_, update_)69#define X_SET_DEF_RW(name_, update_) \70 static int \71 X_SET_RW(name_)(void *data, u64 val) \72 { \73 struct pvr_device *pvr_dev = data; \74 /* This is not just (update_) to suppress -Waddress. */ \75 if ((void *)(update_) != NULL) \76 (update_)(pvr_dev, pvr_dev->params.name_, val); \77 pvr_dev->params.name_ = val; \78 return 0; \79 }80 81#define X(type_, name_, value_, desc_, mode_, update_) \82 static int \83 __pvr_device_param_##name_##_get(void *data, u64 *val) \84 { \85 struct pvr_device *pvr_dev = data; \86 *val = pvr_dev->params.name_; \87 return 0; \88 } \89 X_SET_DEF(name_, update_, mode_) \90 static int \91 __pvr_device_param_##name_##_open(struct inode *inode, \92 struct file *file) \93 { \94 __simple_attr_check_format(PVR_PARAM_TYPE_##type_##_FMT, \95 0ull); \96 return simple_attr_open(inode, file, \97 __pvr_device_param_##name_##_get, \98 X_SET(name_, mode_), \99 PVR_PARAM_TYPE_##type_##_FMT); \100 }101PVR_DEVICE_PARAMS102#undef X103 104#undef X_SET105#undef X_SET_RO106#undef X_SET_RW107#undef X_SET_DEF108#undef X_SET_DEF_RO109#undef X_SET_DEF_RW110 111static struct {112#define X(type_, name_, value_, desc_, mode_, update_) \113 const struct file_operations name_;114 PVR_DEVICE_PARAMS115#undef X116} pvr_device_param_debugfs_fops = {117#define X(type_, name_, value_, desc_, mode_, update_) \118 .name_ = { \119 .owner = THIS_MODULE, \120 .open = __pvr_device_param_##name_##_open, \121 .release = simple_attr_release, \122 .read = simple_attr_read, \123 .write = simple_attr_write, \124 .llseek = generic_file_llseek, \125 },126 PVR_DEVICE_PARAMS127#undef X128};129 130void131pvr_params_debugfs_init(struct pvr_device *pvr_dev, struct dentry *dir)132{133#define X_MODE(mode_) X_MODE_##mode_134#define X_MODE_RO 0400135#define X_MODE_RW 0600136 137#define X(type_, name_, value_, desc_, mode_, update_) \138 debugfs_create_file(#name_, X_MODE(mode_), dir, pvr_dev, \139 &pvr_device_param_debugfs_fops.name_);140 PVR_DEVICE_PARAMS141#undef X142 143#undef X_MODE144#undef X_MODE_RO145#undef X_MODE_RW146}147#endif148