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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 16:07:57 +07:00
drm/i915/params: add i915 parameters to debugfs
Add a debugfs subdirectory i915_params with all the i915 module parameters. This is a first step, with lots of boilerplate, and not much benefit yet. This will result in a new device specific debugfs directory at /sys/kernel/debug/dri/<N>/i915_params duplicating the module specific sysfs directory at /sys/module/i915/parameters/. Going forward, all users of the parameters should use the debugfs, with the module parameters being phased out. Add debugfs permissions to I915_PARAMS_FOR_EACH(). This duplicates the mode with module parameter sysfs, but the goal is to make the module parameters read-only initial values for device specific parameters. 0 mode will bypass debugfs creation. Use it for verbose_state_checks which will need special attention in follow-up work. Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/600101c8433e7caf9303663fc85a9972fa1f05e7.1575560168.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula
parent
f22fd33489
commit
c43c5a8818
@ -66,7 +66,10 @@ i915-y += \
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i915_user_extensions.o
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i915-$(CONFIG_COMPAT) += i915_ioc32.o
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i915-$(CONFIG_DEBUG_FS) += i915_debugfs.o display/intel_pipe_crc.o
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i915-$(CONFIG_DEBUG_FS) += \
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i915_debugfs.o \
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i915_debugfs_params.o \
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display/intel_pipe_crc.o
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i915-$(CONFIG_PERF_EVENTS) += i915_pmu.o
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# "Graphics Technology" (aka we talk to the gpu)
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@ -48,6 +48,7 @@
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#include "gt/uc/intel_guc_submission.h"
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#include "i915_debugfs.h"
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#include "i915_debugfs_params.h"
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#include "i915_irq.h"
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#include "i915_trace.h"
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#include "intel_csr.h"
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@ -4311,9 +4312,10 @@ int i915_debugfs_register(struct drm_i915_private *dev_priv)
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struct drm_minor *minor = dev_priv->drm.primary;
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int i;
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i915_debugfs_params(dev_priv);
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debugfs_create_file("i915_forcewake_user", S_IRUSR, minor->debugfs_root,
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to_i915(minor->dev), &i915_forcewake_fops);
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for (i = 0; i < ARRAY_SIZE(i915_debugfs_files); i++) {
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debugfs_create_file(i915_debugfs_files[i].name,
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S_IRUGO | S_IWUSR,
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233
drivers/gpu/drm/i915/i915_debugfs_params.c
Normal file
233
drivers/gpu/drm/i915/i915_debugfs_params.c
Normal file
@ -0,0 +1,233 @@
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// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2019 Intel Corporation
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*/
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#include <linux/kernel.h>
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#include "i915_drv.h"
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#include "i915_params.h"
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/* int param */
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static int i915_param_int_show(struct seq_file *m, void *data)
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{
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int *value = m->private;
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seq_printf(m, "%d\n", *value);
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return 0;
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}
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static int i915_param_int_open(struct inode *inode, struct file *file)
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{
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return single_open(file, i915_param_int_show, inode->i_private);
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}
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static ssize_t i915_param_int_write(struct file *file,
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const char __user *ubuf, size_t len,
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loff_t *offp)
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{
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struct seq_file *m = file->private_data;
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int *value = m->private;
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int ret;
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ret = kstrtoint_from_user(ubuf, len, 0, value);
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return ret ?: len;
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}
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static const struct file_operations i915_param_int_fops = {
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.owner = THIS_MODULE,
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.open = i915_param_int_open,
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.read = seq_read,
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.write = i915_param_int_write,
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.llseek = default_llseek,
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.release = single_release,
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};
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static const struct file_operations i915_param_int_fops_ro = {
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.owner = THIS_MODULE,
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.open = i915_param_int_open,
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.read = seq_read,
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.llseek = default_llseek,
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.release = single_release,
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};
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/* unsigned int param */
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static int i915_param_uint_show(struct seq_file *m, void *data)
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{
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unsigned int *value = m->private;
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seq_printf(m, "%u\n", *value);
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return 0;
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}
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static int i915_param_uint_open(struct inode *inode, struct file *file)
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{
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return single_open(file, i915_param_uint_show, inode->i_private);
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}
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static ssize_t i915_param_uint_write(struct file *file,
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const char __user *ubuf, size_t len,
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loff_t *offp)
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{
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struct seq_file *m = file->private_data;
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unsigned int *value = m->private;
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int ret;
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ret = kstrtouint_from_user(ubuf, len, 0, value);
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return ret ?: len;
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}
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static const struct file_operations i915_param_uint_fops = {
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.owner = THIS_MODULE,
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.open = i915_param_uint_open,
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.read = seq_read,
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.write = i915_param_uint_write,
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.llseek = default_llseek,
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.release = single_release,
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};
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static const struct file_operations i915_param_uint_fops_ro = {
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.owner = THIS_MODULE,
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.open = i915_param_uint_open,
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.read = seq_read,
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.llseek = default_llseek,
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.release = single_release,
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};
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/* char * param */
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static int i915_param_charp_show(struct seq_file *m, void *data)
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{
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const char **s = m->private;
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seq_printf(m, "%s\n", *s);
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return 0;
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}
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static int i915_param_charp_open(struct inode *inode, struct file *file)
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{
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return single_open(file, i915_param_charp_show, inode->i_private);
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}
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static ssize_t i915_param_charp_write(struct file *file,
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const char __user *ubuf, size_t len,
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loff_t *offp)
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{
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struct seq_file *m = file->private_data;
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char **s = m->private;
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char *new, *old;
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/* FIXME: remove locking after params aren't the module params */
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kernel_param_lock(THIS_MODULE);
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old = *s;
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new = strndup_user(ubuf, PAGE_SIZE);
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if (IS_ERR(new)) {
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len = PTR_ERR(new);
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goto out;
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}
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*s = new;
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kfree(old);
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out:
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kernel_param_unlock(THIS_MODULE);
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return len;
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}
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static const struct file_operations i915_param_charp_fops = {
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.owner = THIS_MODULE,
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.open = i915_param_charp_open,
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.read = seq_read,
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.write = i915_param_charp_write,
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.llseek = default_llseek,
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.release = single_release,
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};
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static const struct file_operations i915_param_charp_fops_ro = {
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.owner = THIS_MODULE,
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.open = i915_param_charp_open,
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.read = seq_read,
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.llseek = default_llseek,
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.release = single_release,
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};
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#define RO(mode) (((mode) & 0222) == 0)
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static struct dentry *
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i915_debugfs_create_int(const char *name, umode_t mode,
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struct dentry *parent, int *value)
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{
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return debugfs_create_file_unsafe(name, mode, parent, value,
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RO(mode) ? &i915_param_int_fops_ro :
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&i915_param_int_fops);
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}
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static struct dentry *
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i915_debugfs_create_uint(const char *name, umode_t mode,
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struct dentry *parent, unsigned int *value)
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{
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return debugfs_create_file_unsafe(name, mode, parent, value,
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RO(mode) ? &i915_param_uint_fops_ro :
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&i915_param_uint_fops);
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}
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static struct dentry *
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i915_debugfs_create_charp(const char *name, umode_t mode,
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struct dentry *parent, char **value)
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{
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return debugfs_create_file(name, mode, parent, value,
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RO(mode) ? &i915_param_charp_fops_ro :
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&i915_param_charp_fops);
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}
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static __always_inline void
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_i915_param_create_file(struct dentry *parent, const char *name,
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const char *type, int mode, void *value)
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{
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if (!mode)
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return;
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if (!__builtin_strcmp(type, "bool"))
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debugfs_create_bool(name, mode, parent, value);
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else if (!__builtin_strcmp(type, "int"))
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i915_debugfs_create_int(name, mode, parent, value);
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else if (!__builtin_strcmp(type, "unsigned int"))
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i915_debugfs_create_uint(name, mode, parent, value);
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else if (!__builtin_strcmp(type, "unsigned long"))
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debugfs_create_ulong(name, mode, parent, value);
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else if (!__builtin_strcmp(type, "char *"))
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i915_debugfs_create_charp(name, mode, parent, value);
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else
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WARN(1, "no debugfs fops defined for param type %s (i915.%s)\n",
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type, name);
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}
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/* add a subdirectory with files for each i915 param */
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struct dentry *i915_debugfs_params(struct drm_i915_private *i915)
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{
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struct drm_minor *minor = i915->drm.primary;
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struct i915_params *params = &i915_modparams;
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struct dentry *dir;
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dir = debugfs_create_dir("i915_params", minor->debugfs_root);
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if (IS_ERR(dir))
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return dir;
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/*
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* Note: We could create files for params needing special handling
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* here. Set mode in params to 0 to skip the generic create file, or
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* just let the generic create file fail silently with -EEXIST.
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*/
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#define REGISTER(T, x, unused, mode, ...) _i915_param_create_file(dir, #x, #T, mode, ¶ms->x);
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I915_PARAMS_FOR_EACH(REGISTER);
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#undef REGISTER
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return dir;
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}
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14
drivers/gpu/drm/i915/i915_debugfs_params.h
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14
drivers/gpu/drm/i915/i915_debugfs_params.h
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@ -0,0 +1,14 @@
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/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2019 Intel Corporation
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*/
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#ifndef __I915_DEBUGFS_PARAMS__
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#define __I915_DEBUGFS_PARAMS__
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struct dentry;
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struct drm_i915_private;
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struct dentry *i915_debugfs_params(struct drm_i915_private *i915);
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#endif /* __I915_DEBUGFS_PARAMS__ */
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@ -35,7 +35,7 @@
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MODULE_PARM_DESC(name, desc)
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struct i915_params i915_modparams __read_mostly = {
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#define MEMBER(T, member, value) .member = (value),
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#define MEMBER(T, member, value, ...) .member = (value),
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I915_PARAMS_FOR_EACH(MEMBER)
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#undef MEMBER
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};
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@ -36,49 +36,51 @@ struct drm_printer;
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/*
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* Invoke param, a function-like macro, for each i915 param, with arguments:
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*
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* param(type, name, value)
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* param(type, name, value, mode)
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*
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* type: parameter type, one of {bool, int, unsigned int, char *}
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* type: parameter type, one of {bool, int, unsigned int, unsigned long, char *}
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* name: name of the parameter
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* value: initial/default value of the parameter
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* mode: debugfs file permissions, one of {0400, 0600, 0}, use 0 to not create
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* debugfs file
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*/
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#define I915_PARAMS_FOR_EACH(param) \
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param(char *, vbt_firmware, NULL) \
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param(int, modeset, -1) \
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param(int, lvds_channel_mode, 0) \
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param(int, panel_use_ssc, -1) \
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param(int, vbt_sdvo_panel_type, -1) \
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param(int, enable_dc, -1) \
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param(int, enable_fbc, -1) \
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param(int, enable_psr, -1) \
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param(int, disable_power_well, -1) \
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param(int, enable_ips, 1) \
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param(int, invert_brightness, 0) \
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param(int, enable_guc, 0) \
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param(int, guc_log_level, -1) \
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param(char *, guc_firmware_path, NULL) \
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param(char *, huc_firmware_path, NULL) \
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param(char *, dmc_firmware_path, NULL) \
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param(int, mmio_debug, -IS_ENABLED(CONFIG_DRM_I915_DEBUG_MMIO)) \
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param(int, edp_vswing, 0) \
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param(int, reset, 3) \
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param(unsigned int, inject_probe_failure, 0) \
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param(int, fastboot, -1) \
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param(int, enable_dpcd_backlight, 0) \
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param(char *, force_probe, CONFIG_DRM_I915_FORCE_PROBE) \
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param(unsigned long, fake_lmem_start, 0) \
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param(char *, vbt_firmware, NULL, 0400) \
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param(int, modeset, -1, 0400) \
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param(int, lvds_channel_mode, 0, 0400) \
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param(int, panel_use_ssc, -1, 0600) \
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param(int, vbt_sdvo_panel_type, -1, 0400) \
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param(int, enable_dc, -1, 0400) \
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param(int, enable_fbc, -1, 0600) \
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param(int, enable_psr, -1, 0600) \
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param(int, disable_power_well, -1, 0400) \
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param(int, enable_ips, 1, 0600) \
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param(int, invert_brightness, 0, 0600) \
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param(int, enable_guc, 0, 0400) \
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param(int, guc_log_level, -1, 0400) \
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param(char *, guc_firmware_path, NULL, 0400) \
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param(char *, huc_firmware_path, NULL, 0400) \
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param(char *, dmc_firmware_path, NULL, 0400) \
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param(int, mmio_debug, -IS_ENABLED(CONFIG_DRM_I915_DEBUG_MMIO), 0600) \
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param(int, edp_vswing, 0, 0400) \
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param(int, reset, 3, 0600) \
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param(unsigned int, inject_probe_failure, 0, 0600) \
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param(int, fastboot, -1, 0600) \
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param(int, enable_dpcd_backlight, 0, 0600) \
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param(char *, force_probe, CONFIG_DRM_I915_FORCE_PROBE, 0400) \
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param(unsigned long, fake_lmem_start, 0, 0400) \
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/* leave bools at the end to not create holes */ \
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param(bool, alpha_support, IS_ENABLED(CONFIG_DRM_I915_ALPHA_SUPPORT)) \
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param(bool, enable_hangcheck, true) \
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param(bool, prefault_disable, false) \
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param(bool, load_detect_test, false) \
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param(bool, force_reset_modeset_test, false) \
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param(bool, error_capture, true) \
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param(bool, disable_display, false) \
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param(bool, verbose_state_checks, true) \
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param(bool, nuclear_pageflip, false) \
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param(bool, enable_dp_mst, true) \
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param(bool, enable_gvt, false)
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param(bool, alpha_support, IS_ENABLED(CONFIG_DRM_I915_ALPHA_SUPPORT), 0400) \
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param(bool, enable_hangcheck, true, 0600) \
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param(bool, prefault_disable, false, 0600) \
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param(bool, load_detect_test, false, 0600) \
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param(bool, force_reset_modeset_test, false, 0600) \
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param(bool, error_capture, true, 0600) \
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param(bool, disable_display, false, 0400) \
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param(bool, verbose_state_checks, true, 0) \
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param(bool, nuclear_pageflip, false, 0400) \
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param(bool, enable_dp_mst, true, 0600) \
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param(bool, enable_gvt, false, 0400)
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#define MEMBER(T, member, ...) T member;
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struct i915_params {
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