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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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cb56cd6108
Firmware trace is exposed at /sys/debug/dri/<dev_nr>/pvr_fw/trace_0.
Trace is enabled via the group mask at
/sys/debug/dri/<dev_nr>/pvr_params/fw_trace_mask.
Changes since v8:
- Corrected license identifiers
Changes since v3:
- Use drm_dev_{enter,exit}
Co-developed-by: Matt Coster <matt.coster@imgtec.com>
Signed-off-by: Matt Coster <matt.coster@imgtec.com>
Signed-off-by: Sarah Walker <sarah.walker@imgtec.com>
Signed-off-by: Donald Robson <donald.robson@imgtec.com>
Link: https://lore.kernel.org/r/009cf9fee347fa96c8a665dc368fc54a5ffceff0.1700668843.git.donald.robson@imgtec.com
Signed-off-by: Maxime Ripard <mripard@kernel.org>
148 lines
4.8 KiB
C
148 lines
4.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only OR MIT
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/* Copyright (c) 2023 Imagination Technologies Ltd. */
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#include "pvr_params.h"
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#include <linux/cache.h>
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#include <linux/moduleparam.h>
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static struct pvr_device_params pvr_device_param_defaults __read_mostly = {
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#define X(type_, name_, value_, desc_, ...) .name_ = (value_),
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PVR_DEVICE_PARAMS
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#undef X
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};
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#define PVR_DEVICE_PARAM_NAMED(name_, type_, desc_) \
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module_param_named(name_, pvr_device_param_defaults.name_, type_, \
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0400); \
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MODULE_PARM_DESC(name_, desc_);
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/*
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* This list of defines must contain every type specified in "pvr_params.h" as
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* ``PVR_PARAM_TYPE_*_C``.
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*/
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#define PVR_PARAM_TYPE_X32_MODPARAM uint
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#define X(type_, name_, value_, desc_, ...) \
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PVR_DEVICE_PARAM_NAMED(name_, PVR_PARAM_TYPE_##type_##_MODPARAM, desc_);
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PVR_DEVICE_PARAMS
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#undef X
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int
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pvr_device_params_init(struct pvr_device_params *params)
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{
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/*
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* If heap-allocated parameters are added in the future (e.g.
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* modparam's charp type), they must be handled specially here (via
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* kstrdup() in the case of charp). Since that's not necessary yet,
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* a straight copy will do for now. This change will also require a
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* pvr_device_params_fini() function to free any heap-allocated copies.
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*/
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*params = pvr_device_param_defaults;
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return 0;
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}
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#if defined(CONFIG_DEBUG_FS)
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#include "pvr_device.h"
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#include <linux/dcache.h>
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#include <linux/debugfs.h>
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#include <linux/export.h>
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#include <linux/fs.h>
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#include <linux/stddef.h>
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/*
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* This list of defines must contain every type specified in "pvr_params.h" as
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* ``PVR_PARAM_TYPE_*_C``.
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*/
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#define PVR_PARAM_TYPE_X32_FMT "0x%08llx"
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#define X_SET(name_, mode_) X_SET_##mode_(name_)
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#define X_SET_DEF(name_, update_, mode_) X_SET_DEF_##mode_(name_, update_)
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#define X_SET_RO(name_) NULL
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#define X_SET_RW(name_) __pvr_device_param_##name_##set
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#define X_SET_DEF_RO(name_, update_)
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#define X_SET_DEF_RW(name_, update_) \
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static int \
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X_SET_RW(name_)(void *data, u64 val) \
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{ \
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struct pvr_device *pvr_dev = data; \
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/* This is not just (update_) to suppress -Waddress. */ \
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if ((void *)(update_) != NULL) \
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(update_)(pvr_dev, pvr_dev->params.name_, val); \
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pvr_dev->params.name_ = val; \
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return 0; \
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}
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#define X(type_, name_, value_, desc_, mode_, update_) \
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static int \
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__pvr_device_param_##name_##_get(void *data, u64 *val) \
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{ \
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struct pvr_device *pvr_dev = data; \
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*val = pvr_dev->params.name_; \
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return 0; \
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} \
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X_SET_DEF(name_, update_, mode_) \
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static int \
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__pvr_device_param_##name_##_open(struct inode *inode, \
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struct file *file) \
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{ \
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__simple_attr_check_format(PVR_PARAM_TYPE_##type_##_FMT, \
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0ull); \
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return simple_attr_open(inode, file, \
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__pvr_device_param_##name_##_get, \
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X_SET(name_, mode_), \
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PVR_PARAM_TYPE_##type_##_FMT); \
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}
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PVR_DEVICE_PARAMS
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#undef X
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#undef X_SET
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#undef X_SET_RO
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#undef X_SET_RW
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#undef X_SET_DEF
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#undef X_SET_DEF_RO
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#undef X_SET_DEF_RW
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static struct {
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#define X(type_, name_, value_, desc_, mode_, update_) \
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const struct file_operations name_;
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PVR_DEVICE_PARAMS
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#undef X
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} pvr_device_param_debugfs_fops = {
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#define X(type_, name_, value_, desc_, mode_, update_) \
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.name_ = { \
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.owner = THIS_MODULE, \
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.open = __pvr_device_param_##name_##_open, \
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.release = simple_attr_release, \
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.read = simple_attr_read, \
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.write = simple_attr_write, \
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.llseek = generic_file_llseek, \
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},
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PVR_DEVICE_PARAMS
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#undef X
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};
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void
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pvr_params_debugfs_init(struct pvr_device *pvr_dev, struct dentry *dir)
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{
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#define X_MODE(mode_) X_MODE_##mode_
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#define X_MODE_RO 0400
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#define X_MODE_RW 0600
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#define X(type_, name_, value_, desc_, mode_, update_) \
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debugfs_create_file(#name_, X_MODE(mode_), dir, pvr_dev, \
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&pvr_device_param_debugfs_fops.name_);
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PVR_DEVICE_PARAMS
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#undef X
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#undef X_MODE
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#undef X_MODE_RO
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#undef X_MODE_RW
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}
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#endif
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