diff options
Diffstat (limited to 'drivers/gpu/drm/imagination/pvr_params.c')
| -rw-r--r-- | drivers/gpu/drm/imagination/pvr_params.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imagination/pvr_params.c b/drivers/gpu/drm/imagination/pvr_params.c new file mode 100644 index 000000000000..b91759f362c5 --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_params.c @@ -0,0 +1,147 @@ +// SPDX-License-Identifier: GPL-2.0-only OR MIT +/* Copyright (c) 2023 Imagination Technologies Ltd. */ + +#include "pvr_params.h" + +#include <linux/cache.h> +#include <linux/moduleparam.h> + +static struct pvr_device_params pvr_device_param_defaults __read_mostly = { +#define X(type_, name_, value_, desc_, ...) .name_ = (value_), + PVR_DEVICE_PARAMS +#undef X +}; + +#define PVR_DEVICE_PARAM_NAMED(name_, type_, desc_) \ + module_param_named(name_, pvr_device_param_defaults.name_, type_, \ + 0400); \ + MODULE_PARM_DESC(name_, desc_); + +/* + * This list of defines must contain every type specified in "pvr_params.h" as + * ``PVR_PARAM_TYPE_*_C``. + */ +#define PVR_PARAM_TYPE_X32_MODPARAM uint + +#define X(type_, name_, value_, desc_, ...) \ + PVR_DEVICE_PARAM_NAMED(name_, PVR_PARAM_TYPE_##type_##_MODPARAM, desc_); +PVR_DEVICE_PARAMS +#undef X + +int +pvr_device_params_init(struct pvr_device_params *params) +{ + /* + * If heap-allocated parameters are added in the future (e.g. + * modparam's charp type), they must be handled specially here (via + * kstrdup() in the case of charp). Since that's not necessary yet, + * a straight copy will do for now. This change will also require a + * pvr_device_params_fini() function to free any heap-allocated copies. + */ + + *params = pvr_device_param_defaults; + + return 0; +} + +#if defined(CONFIG_DEBUG_FS) +#include "pvr_device.h" + +#include <linux/dcache.h> +#include <linux/debugfs.h> +#include <linux/export.h> +#include <linux/fs.h> +#include <linux/stddef.h> + +/* + * This list of defines must contain every type specified in "pvr_params.h" as + * ``PVR_PARAM_TYPE_*_C``. + */ +#define PVR_PARAM_TYPE_X32_FMT "0x%08llx" + +#define X_SET(name_, mode_) X_SET_##mode_(name_) +#define X_SET_DEF(name_, update_, mode_) X_SET_DEF_##mode_(name_, update_) + +#define X_SET_RO(name_) NULL +#define X_SET_RW(name_) __pvr_device_param_##name_##set + +#define X_SET_DEF_RO(name_, update_) +#define X_SET_DEF_RW(name_, update_) \ + static int \ + X_SET_RW(name_)(void *data, u64 val) \ + { \ + struct pvr_device *pvr_dev = data; \ + /* This is not just (update_) to suppress -Waddress. */ \ + if ((void *)(update_) != NULL) \ + (update_)(pvr_dev, pvr_dev->params.name_, val); \ + pvr_dev->params.name_ = val; \ + return 0; \ + } + +#define X(type_, name_, value_, desc_, mode_, update_) \ + static int \ + __pvr_device_param_##name_##_get(void *data, u64 *val) \ + { \ + struct pvr_device *pvr_dev = data; \ + *val = pvr_dev->params.name_; \ + return 0; \ + } \ + X_SET_DEF(name_, update_, mode_) \ + static int \ + __pvr_device_param_##name_##_open(struct inode *inode, \ + struct file *file) \ + { \ + __simple_attr_check_format(PVR_PARAM_TYPE_##type_##_FMT, \ + 0ull); \ + return simple_attr_open(inode, file, \ + __pvr_device_param_##name_##_get, \ + X_SET(name_, mode_), \ + PVR_PARAM_TYPE_##type_##_FMT); \ + } +PVR_DEVICE_PARAMS +#undef X + +#undef X_SET +#undef X_SET_RO +#undef X_SET_RW +#undef X_SET_DEF +#undef X_SET_DEF_RO +#undef X_SET_DEF_RW + +static struct { +#define X(type_, name_, value_, desc_, mode_, update_) \ + const struct file_operations name_; + PVR_DEVICE_PARAMS +#undef X +} pvr_device_param_debugfs_fops = { +#define X(type_, name_, value_, desc_, mode_, update_) \ + .name_ = { \ + .owner = THIS_MODULE, \ + .open = __pvr_device_param_##name_##_open, \ + .release = simple_attr_release, \ + .read = simple_attr_read, \ + .write = simple_attr_write, \ + .llseek = generic_file_llseek, \ + }, + PVR_DEVICE_PARAMS +#undef X +}; + +void +pvr_params_debugfs_init(struct pvr_device *pvr_dev, struct dentry *dir) +{ +#define X_MODE(mode_) X_MODE_##mode_ +#define X_MODE_RO 0400 +#define X_MODE_RW 0600 + +#define X(type_, name_, value_, desc_, mode_, update_) \ + debugfs_create_file(#name_, X_MODE(mode_), dir, pvr_dev, \ + &pvr_device_param_debugfs_fops.name_); + PVR_DEVICE_PARAMS +#undef X + +#undef X_MODE +#undef X_MODE_RO +#undef X_MODE_RW +} +#endif |