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![Jani Nikula](/assets/img/avatar_default.png)
Replace the __builtin_strcmp() if ladder with generics. Signed-off-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Luca Coelho <luciano.coelho@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230118151800.3669913-4-jani.nikula@intel.com
266 lines
6.1 KiB
C
266 lines
6.1 KiB
C
// 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_debugfs_params.h"
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#include "gt/intel_gt.h"
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#include "gt/uc/intel_guc.h"
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#include "i915_drv.h"
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#include "i915_params.h"
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#define MATCH_DEBUGFS_NODE_NAME(_file, _name) \
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(strcmp((_file)->f_path.dentry->d_name.name, (_name)) == 0)
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#define GET_I915(i915, name, ptr) \
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do { \
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struct i915_params *params; \
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params = container_of(((void *)(ptr)), typeof(*params), name); \
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(i915) = container_of(params, typeof(*(i915)), params); \
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} while (0)
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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 int notify_guc(struct drm_i915_private *i915)
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{
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int ret = 0;
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if (intel_uc_uses_guc_submission(&to_gt(i915)->uc))
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ret = intel_guc_global_policies_update(&to_gt(i915)->uc.guc);
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return ret;
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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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if (ret) {
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/* support boolean values too */
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bool b;
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ret = kstrtobool_from_user(ubuf, len, &b);
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if (!ret)
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*value = b;
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}
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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 drm_i915_private *i915;
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struct seq_file *m = file->private_data;
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unsigned int *value = m->private;
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unsigned int old = *value;
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int ret;
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ret = kstrtouint_from_user(ubuf, len, 0, value);
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if (ret) {
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/* support boolean values too */
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bool b;
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ret = kstrtobool_from_user(ubuf, len, &b);
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if (!ret)
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*value = b;
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}
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if (!ret && MATCH_DEBUGFS_NODE_NAME(file, "reset")) {
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GET_I915(i915, reset, value);
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ret = notify_guc(i915);
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if (ret)
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*value = old;
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}
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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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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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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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#define _i915_param_create_file(parent, name, mode, valp) \
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do { \
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if (mode) \
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_Generic(valp, \
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bool *: debugfs_create_bool, \
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int *: i915_debugfs_create_int, \
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unsigned int *: i915_debugfs_create_uint, \
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unsigned long *: debugfs_create_ulong, \
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char **: i915_debugfs_create_charp)(name, mode, parent, valp); \
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} while(0)
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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->params;
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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, 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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