cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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bulk.c (2810B)

      1// SPDX-License-Identifier: GPL-2.0
      2
      3#include <linux/interconnect-provider.h>
      4#include <linux/device.h>
      5#include <linux/export.h>
      6
      7/**
      8 * of_icc_bulk_get() - get interconnect paths
      9 * @dev: the device requesting the path
     10 * @num_paths: the number of icc_bulk_data
     11 * @paths: the table with the paths we want to get
     12 *
     13 * Returns 0 on success or negative errno otherwise.
     14 */
     15int __must_check of_icc_bulk_get(struct device *dev, int num_paths,
     16				 struct icc_bulk_data *paths)
     17{
     18	int ret, i;
     19
     20	for (i = 0; i < num_paths; i++) {
     21		paths[i].path = of_icc_get(dev, paths[i].name);
     22		if (IS_ERR(paths[i].path)) {
     23			ret = PTR_ERR(paths[i].path);
     24			if (ret != -EPROBE_DEFER)
     25				dev_err(dev, "of_icc_get() failed on path %s (%d)\n",
     26					paths[i].name, ret);
     27			paths[i].path = NULL;
     28			goto err;
     29		}
     30	}
     31
     32	return 0;
     33
     34err:
     35	icc_bulk_put(i, paths);
     36
     37	return ret;
     38}
     39EXPORT_SYMBOL_GPL(of_icc_bulk_get);
     40
     41/**
     42 * icc_bulk_put() - put a list of interconnect paths
     43 * @num_paths: the number of icc_bulk_data
     44 * @paths: the icc_bulk_data table with the paths being put
     45 */
     46void icc_bulk_put(int num_paths, struct icc_bulk_data *paths)
     47{
     48	while (--num_paths >= 0) {
     49		icc_put(paths[num_paths].path);
     50		paths[num_paths].path = NULL;
     51	}
     52}
     53EXPORT_SYMBOL_GPL(icc_bulk_put);
     54
     55/**
     56 * icc_bulk_set_bw() - set bandwidth to a set of paths
     57 * @num_paths: the number of icc_bulk_data
     58 * @paths: the icc_bulk_data table containing the paths and bandwidth
     59 *
     60 * Returns 0 on success or negative errno otherwise.
     61 */
     62int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths)
     63{
     64	int ret = 0;
     65	int i;
     66
     67	for (i = 0; i < num_paths; i++) {
     68		ret = icc_set_bw(paths[i].path, paths[i].avg_bw, paths[i].peak_bw);
     69		if (ret) {
     70			pr_err("icc_set_bw() failed on path %s (%d)\n", paths[i].name, ret);
     71			return ret;
     72		}
     73	}
     74
     75	return ret;
     76}
     77EXPORT_SYMBOL_GPL(icc_bulk_set_bw);
     78
     79/**
     80 * icc_bulk_enable() - enable a previously disabled set of paths
     81 * @num_paths: the number of icc_bulk_data
     82 * @paths: the icc_bulk_data table containing the paths and bandwidth
     83 *
     84 * Returns 0 on success or negative errno otherwise.
     85 */
     86int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths)
     87{
     88	int ret, i;
     89
     90	for (i = 0; i < num_paths; i++) {
     91		ret = icc_enable(paths[i].path);
     92		if (ret) {
     93			pr_err("icc_enable() failed on path %s (%d)\n", paths[i].name, ret);
     94			goto err;
     95		}
     96	}
     97
     98	return 0;
     99
    100err:
    101	icc_bulk_disable(i, paths);
    102
    103	return ret;
    104}
    105EXPORT_SYMBOL_GPL(icc_bulk_enable);
    106
    107/**
    108 * icc_bulk_disable() - disable a set of interconnect paths
    109 * @num_paths: the number of icc_bulk_data
    110 * @paths: the icc_bulk_data table containing the paths and bandwidth
    111 */
    112void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths)
    113{
    114	while (--num_paths >= 0)
    115		icc_disable(paths[num_paths].path);
    116}
    117EXPORT_SYMBOL_GPL(icc_bulk_disable);