Georgi Djakov | b41b0ce | 2020-07-29 15:34:39 +0300 | [diff] [blame] | 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 | */ |
| 15 | int __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 | |
| 34 | err: |
| 35 | icc_bulk_put(i, paths); |
| 36 | |
| 37 | return ret; |
| 38 | } |
| 39 | EXPORT_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 | */ |
| 46 | void 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 | } |
| 53 | EXPORT_SYMBOL_GPL(icc_bulk_put); |
| 54 | |
| 55 | /** |
Georgi Djakov | 491aef7 | 2021-03-18 18:34:15 +0200 | [diff] [blame] | 56 | * icc_bulk_set_bw() - set bandwidth to a set of paths |
Georgi Djakov | b41b0ce | 2020-07-29 15:34:39 +0300 | [diff] [blame] | 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 | */ |
| 62 | int 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 | } |
| 77 | EXPORT_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 | */ |
| 86 | int 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 | |
| 100 | err: |
| 101 | icc_bulk_disable(i, paths); |
| 102 | |
| 103 | return ret; |
| 104 | } |
| 105 | EXPORT_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 | */ |
| 112 | void 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 | } |
| 117 | EXPORT_SYMBOL_GPL(icc_bulk_disable); |
Peng Fan | 2fcfa72 | 2022-07-03 17:11:25 +0800 | [diff] [blame] | 118 | |
| 119 | struct icc_bulk_devres { |
| 120 | struct icc_bulk_data *paths; |
| 121 | int num_paths; |
| 122 | }; |
| 123 | |
| 124 | static void devm_icc_bulk_release(struct device *dev, void *res) |
| 125 | { |
| 126 | struct icc_bulk_devres *devres = res; |
| 127 | |
| 128 | icc_bulk_put(devres->num_paths, devres->paths); |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * devm_of_icc_bulk_get() - resource managed of_icc_bulk_get |
| 133 | * @dev: the device requesting the path |
| 134 | * @num_paths: the number of icc_bulk_data |
| 135 | * @paths: the table with the paths we want to get |
| 136 | * |
| 137 | * Returns 0 on success or negative errno otherwise. |
| 138 | */ |
| 139 | int devm_of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths) |
| 140 | { |
| 141 | struct icc_bulk_devres *devres; |
| 142 | int ret; |
| 143 | |
| 144 | devres = devres_alloc(devm_icc_bulk_release, sizeof(*devres), GFP_KERNEL); |
| 145 | if (!devres) |
| 146 | return -ENOMEM; |
| 147 | |
| 148 | ret = of_icc_bulk_get(dev, num_paths, paths); |
| 149 | if (!ret) { |
| 150 | devres->paths = paths; |
| 151 | devres->num_paths = num_paths; |
| 152 | devres_add(dev, devres); |
| 153 | } else { |
| 154 | devres_free(devres); |
| 155 | } |
| 156 | |
| 157 | return ret; |
| 158 | } |
| 159 | EXPORT_SYMBOL_GPL(devm_of_icc_bulk_get); |