linux/drivers/thermal/intel/intel_tcc_cooling.c
Peter Zijlstra cdd30ebb1b module: Convert symbol namespace to string literal
Clean up the existing export namespace code along the same lines of
commit 33def8498fdd ("treewide: Convert macro and uses of __section(foo)
to __section("foo")") and for the same reason, it is not desired for the
namespace argument to be a macro expansion itself.

Scripted using

  git grep -l -e MODULE_IMPORT_NS -e EXPORT_SYMBOL_NS | while read file;
  do
    awk -i inplace '
      /^#define EXPORT_SYMBOL_NS/ {
        gsub(/__stringify\(ns\)/, "ns");
        print;
        next;
      }
      /^#define MODULE_IMPORT_NS/ {
        gsub(/__stringify\(ns\)/, "ns");
        print;
        next;
      }
      /MODULE_IMPORT_NS/ {
        $0 = gensub(/MODULE_IMPORT_NS\(([^)]*)\)/, "MODULE_IMPORT_NS(\"\\1\")", "g");
      }
      /EXPORT_SYMBOL_NS/ {
        if ($0 ~ /(EXPORT_SYMBOL_NS[^(]*)\(([^,]+),/) {
  	if ($0 !~ /(EXPORT_SYMBOL_NS[^(]*)\(([^,]+), ([^)]+)\)/ &&
  	    $0 !~ /(EXPORT_SYMBOL_NS[^(]*)\(\)/ &&
  	    $0 !~ /^my/) {
  	  getline line;
  	  gsub(/[[:space:]]*\\$/, "");
  	  gsub(/[[:space:]]/, "", line);
  	  $0 = $0 " " line;
  	}

  	$0 = gensub(/(EXPORT_SYMBOL_NS[^(]*)\(([^,]+), ([^)]+)\)/,
  		    "\\1(\\2, \"\\3\")", "g");
        }
      }
      { print }' $file;
  done

Requested-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://mail.google.com/mail/u/2/#inbox/FMfcgzQXKWgMmjdFwwdsfgxzKpVHWPlc
Acked-by: Greg KH <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2024-12-02 11:34:44 -08:00

125 lines
2.8 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* cooling device driver that activates the processor throttling by
* programming the TCC Offset register.
* Copyright (c) 2021, Intel Corporation.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/device.h>
#include <linux/intel_tcc.h>
#include <linux/module.h>
#include <linux/thermal.h>
#include <asm/cpu_device_id.h>
#define TCC_PROGRAMMABLE BIT(30)
#define TCC_LOCKED BIT(31)
static struct thermal_cooling_device *tcc_cdev;
static int tcc_get_max_state(struct thermal_cooling_device *cdev, unsigned long
*state)
{
*state = intel_tcc_get_offset_mask();
return 0;
}
static int tcc_get_cur_state(struct thermal_cooling_device *cdev, unsigned long
*state)
{
int offset = intel_tcc_get_offset(-1);
if (offset < 0)
return offset;
*state = offset;
return 0;
}
static int tcc_set_cur_state(struct thermal_cooling_device *cdev, unsigned long
state)
{
return intel_tcc_set_offset(-1, (int)state);
}
static const struct thermal_cooling_device_ops tcc_cooling_ops = {
.get_max_state = tcc_get_max_state,
.get_cur_state = tcc_get_cur_state,
.set_cur_state = tcc_set_cur_state,
};
static const struct x86_cpu_id tcc_ids[] __initconst = {
X86_MATCH_VFM(INTEL_SKYLAKE, NULL),
X86_MATCH_VFM(INTEL_SKYLAKE_L, NULL),
X86_MATCH_VFM(INTEL_KABYLAKE, NULL),
X86_MATCH_VFM(INTEL_KABYLAKE_L, NULL),
X86_MATCH_VFM(INTEL_ICELAKE, NULL),
X86_MATCH_VFM(INTEL_ICELAKE_L, NULL),
X86_MATCH_VFM(INTEL_TIGERLAKE, NULL),
X86_MATCH_VFM(INTEL_TIGERLAKE_L, NULL),
X86_MATCH_VFM(INTEL_COMETLAKE, NULL),
X86_MATCH_VFM(INTEL_ALDERLAKE, NULL),
X86_MATCH_VFM(INTEL_ALDERLAKE_L, NULL),
X86_MATCH_VFM(INTEL_ATOM_GRACEMONT, NULL),
X86_MATCH_VFM(INTEL_RAPTORLAKE, NULL),
X86_MATCH_VFM(INTEL_RAPTORLAKE_P, NULL),
X86_MATCH_VFM(INTEL_RAPTORLAKE_S, NULL),
{}
};
MODULE_DEVICE_TABLE(x86cpu, tcc_ids);
static int __init tcc_cooling_init(void)
{
int ret;
u64 val;
const struct x86_cpu_id *id;
int err;
id = x86_match_cpu(tcc_ids);
if (!id)
return -ENODEV;
err = rdmsrl_safe(MSR_PLATFORM_INFO, &val);
if (err)
return err;
if (!(val & TCC_PROGRAMMABLE))
return -ENODEV;
err = rdmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, &val);
if (err)
return err;
if (val & TCC_LOCKED) {
pr_info("TCC Offset locked\n");
return -ENODEV;
}
pr_info("Programmable TCC Offset detected\n");
tcc_cdev =
thermal_cooling_device_register("TCC Offset", NULL,
&tcc_cooling_ops);
if (IS_ERR(tcc_cdev)) {
ret = PTR_ERR(tcc_cdev);
return ret;
}
return 0;
}
module_init(tcc_cooling_init)
static void __exit tcc_cooling_exit(void)
{
thermal_cooling_device_unregister(tcc_cdev);
}
module_exit(tcc_cooling_exit)
MODULE_IMPORT_NS("INTEL_TCC");
MODULE_DESCRIPTION("TCC offset cooling device Driver");
MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>");
MODULE_LICENSE("GPL v2");