Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 2 | /* |
| 3 | * Generic OPP debugfs interface |
| 4 | * |
| 5 | * Copyright (C) 2015-2016 Viresh Kumar <viresh.kumar@linaro.org> |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 9 | |
| 10 | #include <linux/debugfs.h> |
| 11 | #include <linux/device.h> |
| 12 | #include <linux/err.h> |
Viresh Kumar | 021dbec | 2022-02-10 14:37:53 +0530 | [diff] [blame] | 13 | #include <linux/of.h> |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 14 | #include <linux/init.h> |
| 15 | #include <linux/limits.h> |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 16 | #include <linux/slab.h> |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 17 | |
| 18 | #include "opp.h" |
| 19 | |
| 20 | static struct dentry *rootdir; |
| 21 | |
| 22 | static void opp_set_dev_name(const struct device *dev, char *name) |
| 23 | { |
| 24 | if (dev->parent) |
| 25 | snprintf(name, NAME_MAX, "%s-%s", dev_name(dev->parent), |
| 26 | dev_name(dev)); |
| 27 | else |
| 28 | snprintf(name, NAME_MAX, "%s", dev_name(dev)); |
| 29 | } |
| 30 | |
| 31 | void opp_debug_remove_one(struct dev_pm_opp *opp) |
| 32 | { |
| 33 | debugfs_remove_recursive(opp->dentry); |
| 34 | } |
| 35 | |
Viresh Kumar | 0430b1d | 2020-05-18 14:25:32 +0300 | [diff] [blame] | 36 | static ssize_t bw_name_read(struct file *fp, char __user *userbuf, |
| 37 | size_t count, loff_t *ppos) |
| 38 | { |
| 39 | struct icc_path *path = fp->private_data; |
| 40 | char buf[64]; |
| 41 | int i; |
| 42 | |
| 43 | i = scnprintf(buf, sizeof(buf), "%.62s\n", icc_get_name(path)); |
| 44 | |
| 45 | return simple_read_from_buffer(userbuf, count, ppos, buf, i); |
| 46 | } |
| 47 | |
| 48 | static const struct file_operations bw_name_fops = { |
| 49 | .open = simple_open, |
| 50 | .read = bw_name_read, |
| 51 | .llseek = default_llseek, |
| 52 | }; |
| 53 | |
| 54 | static void opp_debug_create_bw(struct dev_pm_opp *opp, |
| 55 | struct opp_table *opp_table, |
| 56 | struct dentry *pdentry) |
| 57 | { |
| 58 | struct dentry *d; |
| 59 | char name[11]; |
| 60 | int i; |
| 61 | |
| 62 | for (i = 0; i < opp_table->path_count; i++) { |
| 63 | snprintf(name, sizeof(name), "icc-path-%.1d", i); |
| 64 | |
| 65 | /* Create per-path directory */ |
| 66 | d = debugfs_create_dir(name, pdentry); |
| 67 | |
| 68 | debugfs_create_file("name", S_IRUGO, d, opp_table->paths[i], |
| 69 | &bw_name_fops); |
| 70 | debugfs_create_u32("peak_bw", S_IRUGO, d, |
| 71 | &opp->bandwidth[i].peak); |
| 72 | debugfs_create_u32("avg_bw", S_IRUGO, d, |
| 73 | &opp->bandwidth[i].avg); |
| 74 | } |
| 75 | } |
| 76 | |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 77 | static void opp_debug_create_clks(struct dev_pm_opp *opp, |
| 78 | struct opp_table *opp_table, |
| 79 | struct dentry *pdentry) |
| 80 | { |
| 81 | char name[12]; |
| 82 | int i; |
| 83 | |
| 84 | if (opp_table->clk_count == 1) { |
| 85 | debugfs_create_ulong("rate_hz", S_IRUGO, pdentry, &opp->rates[0]); |
| 86 | return; |
| 87 | } |
| 88 | |
| 89 | for (i = 0; i < opp_table->clk_count; i++) { |
| 90 | snprintf(name, sizeof(name), "rate_hz_%d", i); |
| 91 | debugfs_create_ulong(name, S_IRUGO, pdentry, &opp->rates[i]); |
| 92 | } |
| 93 | } |
| 94 | |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 95 | static void opp_debug_create_supplies(struct dev_pm_opp *opp, |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 96 | struct opp_table *opp_table, |
| 97 | struct dentry *pdentry) |
| 98 | { |
| 99 | struct dentry *d; |
Viresh Kumar | 1fae788 | 2017-05-23 09:32:13 +0530 | [diff] [blame] | 100 | int i; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 101 | |
Viresh Kumar | 1fae788 | 2017-05-23 09:32:13 +0530 | [diff] [blame] | 102 | for (i = 0; i < opp_table->regulator_count; i++) { |
Arvind Yadav | d741029a | 2017-09-21 11:15:36 +0530 | [diff] [blame] | 103 | char name[15]; |
| 104 | |
| 105 | snprintf(name, sizeof(name), "supply-%d", i); |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 106 | |
| 107 | /* Create per-opp directory */ |
| 108 | d = debugfs_create_dir(name, pdentry); |
| 109 | |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 110 | debugfs_create_ulong("u_volt_target", S_IRUGO, d, |
| 111 | &opp->supplies[i].u_volt); |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 112 | |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 113 | debugfs_create_ulong("u_volt_min", S_IRUGO, d, |
| 114 | &opp->supplies[i].u_volt_min); |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 115 | |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 116 | debugfs_create_ulong("u_volt_max", S_IRUGO, d, |
| 117 | &opp->supplies[i].u_volt_max); |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 118 | |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 119 | debugfs_create_ulong("u_amp", S_IRUGO, d, |
| 120 | &opp->supplies[i].u_amp); |
Lukasz Luba | 4f9a7a1 | 2022-03-02 11:29:14 +0000 | [diff] [blame] | 121 | |
| 122 | debugfs_create_ulong("u_watt", S_IRUGO, d, |
| 123 | &opp->supplies[i].u_watt); |
Viresh Kumar | 1fae788 | 2017-05-23 09:32:13 +0530 | [diff] [blame] | 124 | } |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 125 | } |
| 126 | |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 127 | void opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table) |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 128 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 129 | struct dentry *pdentry = opp_table->dentry; |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 130 | struct dentry *d; |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 131 | unsigned long id; |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 132 | char name[25]; /* 20 chars for 64 bit value + 5 (opp:\0) */ |
| 133 | |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 134 | /* |
| 135 | * Get directory name for OPP. |
| 136 | * |
| 137 | * - Normally rate is unique to each OPP, use it to get unique opp-name. |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 138 | * - For some devices rate isn't available or there are multiple, use |
| 139 | * index instead for them. |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 140 | */ |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 141 | if (likely(opp_table->clk_count == 1 && opp->rates[0])) |
| 142 | id = opp->rates[0]; |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 143 | else |
| 144 | id = _get_opp_count(opp_table); |
| 145 | |
| 146 | snprintf(name, sizeof(name), "opp:%lu", id); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 147 | |
| 148 | /* Create per-opp directory */ |
| 149 | d = debugfs_create_dir(name, pdentry); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 150 | |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 151 | debugfs_create_bool("available", S_IRUGO, d, &opp->available); |
| 152 | debugfs_create_bool("dynamic", S_IRUGO, d, &opp->dynamic); |
| 153 | debugfs_create_bool("turbo", S_IRUGO, d, &opp->turbo); |
| 154 | debugfs_create_bool("suspend", S_IRUGO, d, &opp->suspend); |
| 155 | debugfs_create_u32("performance_state", S_IRUGO, d, &opp->pstate); |
Viresh Kumar | 021dbec | 2022-02-10 14:37:53 +0530 | [diff] [blame] | 156 | debugfs_create_u32("level", S_IRUGO, d, &opp->level); |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 157 | debugfs_create_ulong("clock_latency_ns", S_IRUGO, d, |
| 158 | &opp->clock_latency_ns); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 159 | |
Viresh Kumar | 021dbec | 2022-02-10 14:37:53 +0530 | [diff] [blame] | 160 | opp->of_name = of_node_full_name(opp->np); |
| 161 | debugfs_create_str("of_name", S_IRUGO, d, (char **)&opp->of_name); |
| 162 | |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 163 | opp_debug_create_clks(opp, opp_table, d); |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 164 | opp_debug_create_supplies(opp, opp_table, d); |
Viresh Kumar | 0430b1d | 2020-05-18 14:25:32 +0300 | [diff] [blame] | 165 | opp_debug_create_bw(opp, opp_table, d); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 166 | |
| 167 | opp->dentry = d; |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 168 | } |
| 169 | |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 170 | static void opp_list_debug_create_dir(struct opp_device *opp_dev, |
| 171 | struct opp_table *opp_table) |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 172 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 173 | const struct device *dev = opp_dev->dev; |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 174 | struct dentry *d; |
| 175 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 176 | opp_set_dev_name(dev, opp_table->dentry_name); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 177 | |
| 178 | /* Create device specific directory */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 179 | d = debugfs_create_dir(opp_table->dentry_name, rootdir); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 180 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 181 | opp_dev->dentry = d; |
| 182 | opp_table->dentry = d; |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 183 | } |
| 184 | |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 185 | static void opp_list_debug_create_link(struct opp_device *opp_dev, |
| 186 | struct opp_table *opp_table) |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 187 | { |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 188 | char name[NAME_MAX]; |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 189 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 190 | opp_set_dev_name(opp_dev->dev, name); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 191 | |
| 192 | /* Create device specific directory link */ |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 193 | opp_dev->dentry = debugfs_create_symlink(name, rootdir, |
| 194 | opp_table->dentry_name); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | /** |
| 198 | * opp_debug_register - add a device opp node to the debugfs 'opp' directory |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 199 | * @opp_dev: opp-dev pointer for device |
| 200 | * @opp_table: the device-opp being added |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 201 | * |
| 202 | * Dynamically adds device specific directory in debugfs 'opp' directory. If the |
| 203 | * device-opp is shared with other devices, then links will be created for all |
| 204 | * devices except the first. |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 205 | */ |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 206 | void opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table) |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 207 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 208 | if (opp_table->dentry) |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 209 | opp_list_debug_create_link(opp_dev, opp_table); |
| 210 | else |
| 211 | opp_list_debug_create_dir(opp_dev, opp_table); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 212 | } |
| 213 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 214 | static void opp_migrate_dentry(struct opp_device *opp_dev, |
| 215 | struct opp_table *opp_table) |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 216 | { |
Xiaomeng Tong | c14faab | 2022-03-31 16:30:18 +0800 | [diff] [blame] | 217 | struct opp_device *new_dev = NULL, *iter; |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 218 | const struct device *dev; |
| 219 | struct dentry *dentry; |
| 220 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 221 | /* Look for next opp-dev */ |
Xiaomeng Tong | c14faab | 2022-03-31 16:30:18 +0800 | [diff] [blame] | 222 | list_for_each_entry(iter, &opp_table->dev_list, node) |
| 223 | if (iter != opp_dev) { |
| 224 | new_dev = iter; |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 225 | break; |
Xiaomeng Tong | c14faab | 2022-03-31 16:30:18 +0800 | [diff] [blame] | 226 | } |
| 227 | |
| 228 | BUG_ON(!new_dev); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 229 | |
| 230 | /* new_dev is guaranteed to be valid here */ |
| 231 | dev = new_dev->dev; |
| 232 | debugfs_remove_recursive(new_dev->dentry); |
| 233 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 234 | opp_set_dev_name(dev, opp_table->dentry_name); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 235 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 236 | dentry = debugfs_rename(rootdir, opp_dev->dentry, rootdir, |
| 237 | opp_table->dentry_name); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 238 | if (!dentry) { |
| 239 | dev_err(dev, "%s: Failed to rename link from: %s to %s\n", |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 240 | __func__, dev_name(opp_dev->dev), dev_name(dev)); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 241 | return; |
| 242 | } |
| 243 | |
| 244 | new_dev->dentry = dentry; |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 245 | opp_table->dentry = dentry; |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 246 | } |
| 247 | |
| 248 | /** |
| 249 | * opp_debug_unregister - remove a device opp node from debugfs opp directory |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 250 | * @opp_dev: opp-dev pointer for device |
| 251 | * @opp_table: the device-opp being removed |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 252 | * |
| 253 | * Dynamically removes device specific directory from debugfs 'opp' directory. |
| 254 | */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 255 | void opp_debug_unregister(struct opp_device *opp_dev, |
| 256 | struct opp_table *opp_table) |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 257 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 258 | if (opp_dev->dentry == opp_table->dentry) { |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 259 | /* Move the real dentry object under another device */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 260 | if (!list_is_singular(&opp_table->dev_list)) { |
| 261 | opp_migrate_dentry(opp_dev, opp_table); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 262 | goto out; |
| 263 | } |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 264 | opp_table->dentry = NULL; |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 265 | } |
| 266 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 267 | debugfs_remove_recursive(opp_dev->dentry); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 268 | |
| 269 | out: |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 270 | opp_dev->dentry = NULL; |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 271 | } |
| 272 | |
| 273 | static int __init opp_debug_init(void) |
| 274 | { |
| 275 | /* Create /sys/kernel/debug/opp directory */ |
| 276 | rootdir = debugfs_create_dir("opp", NULL); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 277 | |
| 278 | return 0; |
| 279 | } |
| 280 | core_initcall(opp_debug_init); |