Thomas Gleixner | 2874c5f | 2019-05-27 08:55:01 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 2 | /* |
| 3 | * RapidIO sysfs attributes and support |
| 4 | * |
| 5 | * Copyright 2005 MontaVista Software, Inc. |
| 6 | * Matt Porter <mporter@kernel.crashing.org> |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 7 | */ |
| 8 | |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 9 | #include <linux/kernel.h> |
| 10 | #include <linux/rio.h> |
| 11 | #include <linux/rio_drv.h> |
| 12 | #include <linux/stat.h> |
Alexandre Bounine | 388b78a | 2011-03-23 16:43:03 -0700 | [diff] [blame] | 13 | #include <linux/capability.h> |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 14 | |
| 15 | #include "rio.h" |
| 16 | |
| 17 | /* Sysfs support */ |
| 18 | #define rio_config_attr(field, format_string) \ |
| 19 | static ssize_t \ |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 20 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 21 | { \ |
| 22 | struct rio_dev *rdev = to_rio_dev(dev); \ |
| 23 | \ |
| 24 | return sprintf(buf, format_string, rdev->field); \ |
| 25 | } \ |
Greg Kroah-Hartman | 6d39c80 | 2013-10-06 23:55:47 -0700 | [diff] [blame] | 26 | static DEVICE_ATTR_RO(field); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 27 | |
| 28 | rio_config_attr(did, "0x%04x\n"); |
| 29 | rio_config_attr(vid, "0x%04x\n"); |
| 30 | rio_config_attr(device_rev, "0x%08x\n"); |
| 31 | rio_config_attr(asm_did, "0x%04x\n"); |
| 32 | rio_config_attr(asm_vid, "0x%04x\n"); |
| 33 | rio_config_attr(asm_rev, "0x%04x\n"); |
Alexandre Bounine | cd8b974 | 2011-03-23 16:42:59 -0700 | [diff] [blame] | 34 | rio_config_attr(destid, "0x%04x\n"); |
| 35 | rio_config_attr(hopcount, "0x%02x\n"); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 36 | |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 37 | static ssize_t routes_show(struct device *dev, struct device_attribute *attr, char *buf) |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 38 | { |
| 39 | struct rio_dev *rdev = to_rio_dev(dev); |
| 40 | char *str = buf; |
| 41 | int i; |
| 42 | |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 43 | for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size); |
| 44 | i++) { |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 45 | if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE) |
| 46 | continue; |
| 47 | str += |
| 48 | sprintf(str, "%04x %02x\n", i, |
| 49 | rdev->rswitch->route_table[i]); |
| 50 | } |
| 51 | |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 52 | return (str - buf); |
| 53 | } |
Greg Kroah-Hartman | 6d39c80 | 2013-10-06 23:55:47 -0700 | [diff] [blame] | 54 | static DEVICE_ATTR_RO(routes); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 55 | |
Alexandre Bounine | cd8b974 | 2011-03-23 16:42:59 -0700 | [diff] [blame] | 56 | static ssize_t lprev_show(struct device *dev, |
| 57 | struct device_attribute *attr, char *buf) |
| 58 | { |
| 59 | struct rio_dev *rdev = to_rio_dev(dev); |
| 60 | |
| 61 | return sprintf(buf, "%s\n", |
| 62 | (rdev->prev) ? rio_name(rdev->prev) : "root"); |
| 63 | } |
Greg Kroah-Hartman | 6d39c80 | 2013-10-06 23:55:47 -0700 | [diff] [blame] | 64 | static DEVICE_ATTR_RO(lprev); |
Alexandre Bounine | cd8b974 | 2011-03-23 16:42:59 -0700 | [diff] [blame] | 65 | |
| 66 | static ssize_t lnext_show(struct device *dev, |
| 67 | struct device_attribute *attr, char *buf) |
| 68 | { |
| 69 | struct rio_dev *rdev = to_rio_dev(dev); |
| 70 | char *str = buf; |
| 71 | int i; |
| 72 | |
| 73 | if (rdev->pef & RIO_PEF_SWITCH) { |
| 74 | for (i = 0; i < RIO_GET_TOTAL_PORTS(rdev->swpinfo); i++) { |
| 75 | if (rdev->rswitch->nextdev[i]) |
| 76 | str += sprintf(str, "%s\n", |
| 77 | rio_name(rdev->rswitch->nextdev[i])); |
| 78 | else |
| 79 | str += sprintf(str, "null\n"); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | return str - buf; |
| 84 | } |
Greg Kroah-Hartman | 6d39c80 | 2013-10-06 23:55:47 -0700 | [diff] [blame] | 85 | static DEVICE_ATTR_RO(lnext); |
Alexandre Bounine | cd8b974 | 2011-03-23 16:42:59 -0700 | [diff] [blame] | 86 | |
Alexandre Bounine | 3bdbb62 | 2013-07-03 15:08:58 -0700 | [diff] [blame] | 87 | static ssize_t modalias_show(struct device *dev, |
| 88 | struct device_attribute *attr, char *buf) |
| 89 | { |
| 90 | struct rio_dev *rdev = to_rio_dev(dev); |
| 91 | |
| 92 | return sprintf(buf, "rapidio:v%04Xd%04Xav%04Xad%04X\n", |
| 93 | rdev->vid, rdev->did, rdev->asm_vid, rdev->asm_did); |
| 94 | } |
Greg Kroah-Hartman | 6d39c80 | 2013-10-06 23:55:47 -0700 | [diff] [blame] | 95 | static DEVICE_ATTR_RO(modalias); |
Alexandre Bounine | 3bdbb62 | 2013-07-03 15:08:58 -0700 | [diff] [blame] | 96 | |
Greg Kroah-Hartman | 6d39c80 | 2013-10-06 23:55:47 -0700 | [diff] [blame] | 97 | static struct attribute *rio_dev_attrs[] = { |
| 98 | &dev_attr_did.attr, |
| 99 | &dev_attr_vid.attr, |
| 100 | &dev_attr_device_rev.attr, |
| 101 | &dev_attr_asm_did.attr, |
| 102 | &dev_attr_asm_vid.attr, |
| 103 | &dev_attr_asm_rev.attr, |
| 104 | &dev_attr_lprev.attr, |
| 105 | &dev_attr_destid.attr, |
| 106 | &dev_attr_modalias.attr, |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 107 | |
Dmitry Torokhov | 70359c4 | 2017-02-15 11:50:55 -0800 | [diff] [blame] | 108 | /* Switch-only attributes */ |
| 109 | &dev_attr_routes.attr, |
| 110 | &dev_attr_lnext.attr, |
| 111 | &dev_attr_hopcount.attr, |
Greg Kroah-Hartman | 6d39c80 | 2013-10-06 23:55:47 -0700 | [diff] [blame] | 112 | NULL, |
| 113 | }; |
Alexandre Bounine | ac38d72 | 2010-10-27 15:34:31 -0700 | [diff] [blame] | 114 | |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 115 | static ssize_t |
Chris Wright | 2c3c8be | 2010-05-12 18:28:57 -0700 | [diff] [blame] | 116 | rio_read_config(struct file *filp, struct kobject *kobj, |
| 117 | struct bin_attribute *bin_attr, |
Zhang Rui | 91a6902 | 2007-06-09 13:57:22 +0800 | [diff] [blame] | 118 | char *buf, loff_t off, size_t count) |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 119 | { |
Geliang Tang | a253f1e | 2016-01-20 15:00:39 -0800 | [diff] [blame] | 120 | struct rio_dev *dev = to_rio_dev(kobj_to_dev(kobj)); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 121 | unsigned int size = 0x100; |
| 122 | loff_t init_off = off; |
| 123 | u8 *data = (u8 *) buf; |
| 124 | |
| 125 | /* Several chips lock up trying to read undefined config space */ |
| 126 | if (capable(CAP_SYS_ADMIN)) |
Alexandre Bounine | fe41947 | 2011-02-25 14:44:31 -0800 | [diff] [blame] | 127 | size = RIO_MAINT_SPACE_SZ; |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 128 | |
Alexandre Bounine | fe41947 | 2011-02-25 14:44:31 -0800 | [diff] [blame] | 129 | if (off >= size) |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 130 | return 0; |
| 131 | if (off + count > size) { |
| 132 | size -= off; |
| 133 | count = size; |
| 134 | } else { |
| 135 | size = count; |
| 136 | } |
| 137 | |
| 138 | if ((off & 1) && size) { |
| 139 | u8 val; |
| 140 | rio_read_config_8(dev, off, &val); |
| 141 | data[off - init_off] = val; |
| 142 | off++; |
| 143 | size--; |
| 144 | } |
| 145 | |
| 146 | if ((off & 3) && size > 2) { |
| 147 | u16 val; |
| 148 | rio_read_config_16(dev, off, &val); |
| 149 | data[off - init_off] = (val >> 8) & 0xff; |
| 150 | data[off - init_off + 1] = val & 0xff; |
| 151 | off += 2; |
| 152 | size -= 2; |
| 153 | } |
| 154 | |
| 155 | while (size > 3) { |
| 156 | u32 val; |
| 157 | rio_read_config_32(dev, off, &val); |
| 158 | data[off - init_off] = (val >> 24) & 0xff; |
| 159 | data[off - init_off + 1] = (val >> 16) & 0xff; |
| 160 | data[off - init_off + 2] = (val >> 8) & 0xff; |
| 161 | data[off - init_off + 3] = val & 0xff; |
| 162 | off += 4; |
| 163 | size -= 4; |
| 164 | } |
| 165 | |
| 166 | if (size >= 2) { |
| 167 | u16 val; |
| 168 | rio_read_config_16(dev, off, &val); |
| 169 | data[off - init_off] = (val >> 8) & 0xff; |
| 170 | data[off - init_off + 1] = val & 0xff; |
| 171 | off += 2; |
| 172 | size -= 2; |
| 173 | } |
| 174 | |
| 175 | if (size > 0) { |
| 176 | u8 val; |
| 177 | rio_read_config_8(dev, off, &val); |
| 178 | data[off - init_off] = val; |
| 179 | off++; |
| 180 | --size; |
| 181 | } |
| 182 | |
| 183 | return count; |
| 184 | } |
| 185 | |
| 186 | static ssize_t |
Chris Wright | 2c3c8be | 2010-05-12 18:28:57 -0700 | [diff] [blame] | 187 | rio_write_config(struct file *filp, struct kobject *kobj, |
| 188 | struct bin_attribute *bin_attr, |
Zhang Rui | 91a6902 | 2007-06-09 13:57:22 +0800 | [diff] [blame] | 189 | char *buf, loff_t off, size_t count) |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 190 | { |
Geliang Tang | a253f1e | 2016-01-20 15:00:39 -0800 | [diff] [blame] | 191 | struct rio_dev *dev = to_rio_dev(kobj_to_dev(kobj)); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 192 | unsigned int size = count; |
| 193 | loff_t init_off = off; |
| 194 | u8 *data = (u8 *) buf; |
| 195 | |
Alexandre Bounine | fe41947 | 2011-02-25 14:44:31 -0800 | [diff] [blame] | 196 | if (off >= RIO_MAINT_SPACE_SZ) |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 197 | return 0; |
Alexandre Bounine | fe41947 | 2011-02-25 14:44:31 -0800 | [diff] [blame] | 198 | if (off + count > RIO_MAINT_SPACE_SZ) { |
| 199 | size = RIO_MAINT_SPACE_SZ - off; |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 200 | count = size; |
| 201 | } |
| 202 | |
| 203 | if ((off & 1) && size) { |
| 204 | rio_write_config_8(dev, off, data[off - init_off]); |
| 205 | off++; |
| 206 | size--; |
| 207 | } |
| 208 | |
| 209 | if ((off & 3) && (size > 2)) { |
| 210 | u16 val = data[off - init_off + 1]; |
| 211 | val |= (u16) data[off - init_off] << 8; |
| 212 | rio_write_config_16(dev, off, val); |
| 213 | off += 2; |
| 214 | size -= 2; |
| 215 | } |
| 216 | |
| 217 | while (size > 3) { |
| 218 | u32 val = data[off - init_off + 3]; |
| 219 | val |= (u32) data[off - init_off + 2] << 8; |
| 220 | val |= (u32) data[off - init_off + 1] << 16; |
| 221 | val |= (u32) data[off - init_off] << 24; |
| 222 | rio_write_config_32(dev, off, val); |
| 223 | off += 4; |
| 224 | size -= 4; |
| 225 | } |
| 226 | |
| 227 | if (size >= 2) { |
| 228 | u16 val = data[off - init_off + 1]; |
| 229 | val |= (u16) data[off - init_off] << 8; |
| 230 | rio_write_config_16(dev, off, val); |
| 231 | off += 2; |
| 232 | size -= 2; |
| 233 | } |
| 234 | |
| 235 | if (size) { |
| 236 | rio_write_config_8(dev, off, data[off - init_off]); |
| 237 | off++; |
| 238 | --size; |
| 239 | } |
| 240 | |
| 241 | return count; |
| 242 | } |
| 243 | |
| 244 | static struct bin_attribute rio_config_attr = { |
| 245 | .attr = { |
| 246 | .name = "config", |
| 247 | .mode = S_IRUGO | S_IWUSR, |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 248 | }, |
Alexandre Bounine | fe41947 | 2011-02-25 14:44:31 -0800 | [diff] [blame] | 249 | .size = RIO_MAINT_SPACE_SZ, |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 250 | .read = rio_read_config, |
| 251 | .write = rio_write_config, |
| 252 | }; |
| 253 | |
Dmitry Torokhov | 70359c4 | 2017-02-15 11:50:55 -0800 | [diff] [blame] | 254 | static struct bin_attribute *rio_dev_bin_attrs[] = { |
| 255 | &rio_config_attr, |
| 256 | NULL, |
| 257 | }; |
| 258 | |
| 259 | static umode_t rio_dev_is_attr_visible(struct kobject *kobj, |
| 260 | struct attribute *attr, int n) |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 261 | { |
Dmitry Torokhov | 70359c4 | 2017-02-15 11:50:55 -0800 | [diff] [blame] | 262 | struct rio_dev *rdev = to_rio_dev(kobj_to_dev(kobj)); |
| 263 | umode_t mode = attr->mode; |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 264 | |
Dmitry Torokhov | 70359c4 | 2017-02-15 11:50:55 -0800 | [diff] [blame] | 265 | if (!(rdev->pef & RIO_PEF_SWITCH) && |
| 266 | (attr == &dev_attr_routes.attr || |
| 267 | attr == &dev_attr_lnext.attr || |
| 268 | attr == &dev_attr_hopcount.attr)) { |
| 269 | /* |
| 270 | * Hide switch-specific attributes for a non-switch device. |
| 271 | */ |
| 272 | mode = 0; |
Alexandre Bounine | ac38d72 | 2010-10-27 15:34:31 -0700 | [diff] [blame] | 273 | } |
| 274 | |
Dmitry Torokhov | 70359c4 | 2017-02-15 11:50:55 -0800 | [diff] [blame] | 275 | return mode; |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 276 | } |
| 277 | |
Dmitry Torokhov | 70359c4 | 2017-02-15 11:50:55 -0800 | [diff] [blame] | 278 | static const struct attribute_group rio_dev_group = { |
| 279 | .attrs = rio_dev_attrs, |
| 280 | .is_visible = rio_dev_is_attr_visible, |
| 281 | .bin_attrs = rio_dev_bin_attrs, |
| 282 | }; |
| 283 | |
| 284 | const struct attribute_group *rio_dev_groups[] = { |
| 285 | &rio_dev_group, |
| 286 | NULL, |
| 287 | }; |
Alexandre Bounine | bc8fcfe | 2013-05-24 15:55:06 -0700 | [diff] [blame] | 288 | |
Greg Kroah-Hartman | 75cff72 | 2023-03-13 19:29:05 +0100 | [diff] [blame] | 289 | static ssize_t scan_store(const struct bus_type *bus, const char *buf, size_t count) |
Alexandre Bounine | bc8fcfe | 2013-05-24 15:55:06 -0700 | [diff] [blame] | 290 | { |
| 291 | long val; |
Alexandre Bounine | bc8fcfe | 2013-05-24 15:55:06 -0700 | [diff] [blame] | 292 | int rc; |
| 293 | |
| 294 | if (kstrtol(buf, 0, &val) < 0) |
| 295 | return -EINVAL; |
| 296 | |
| 297 | if (val == RIO_MPORT_ANY) { |
| 298 | rc = rio_init_mports(); |
| 299 | goto exit; |
| 300 | } |
| 301 | |
| 302 | if (val < 0 || val >= RIO_MAX_MPORTS) |
| 303 | return -EINVAL; |
| 304 | |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 305 | rc = rio_mport_scan((int)val); |
Alexandre Bounine | bc8fcfe | 2013-05-24 15:55:06 -0700 | [diff] [blame] | 306 | exit: |
| 307 | if (!rc) |
| 308 | rc = count; |
| 309 | |
| 310 | return rc; |
| 311 | } |
Greg Kroah-Hartman | c9fbe76 | 2018-12-21 08:54:37 +0100 | [diff] [blame] | 312 | static BUS_ATTR_WO(scan); |
Alexandre Bounine | bc8fcfe | 2013-05-24 15:55:06 -0700 | [diff] [blame] | 313 | |
Greg Kroah-Hartman | ed1d2da | 2013-08-23 14:24:29 -0700 | [diff] [blame] | 314 | static struct attribute *rio_bus_attrs[] = { |
| 315 | &bus_attr_scan.attr, |
| 316 | NULL, |
| 317 | }; |
| 318 | |
| 319 | static const struct attribute_group rio_bus_group = { |
| 320 | .attrs = rio_bus_attrs, |
| 321 | }; |
| 322 | |
| 323 | const struct attribute_group *rio_bus_groups[] = { |
| 324 | &rio_bus_group, |
| 325 | NULL, |
Alexandre Bounine | bc8fcfe | 2013-05-24 15:55:06 -0700 | [diff] [blame] | 326 | }; |
Alexandre Bounine | 2aaf308 | 2014-04-07 15:38:56 -0700 | [diff] [blame] | 327 | |
| 328 | static ssize_t |
| 329 | port_destid_show(struct device *dev, struct device_attribute *attr, |
| 330 | char *buf) |
| 331 | { |
| 332 | struct rio_mport *mport = to_rio_mport(dev); |
| 333 | |
| 334 | if (mport) |
| 335 | return sprintf(buf, "0x%04x\n", mport->host_deviceid); |
| 336 | else |
| 337 | return -ENODEV; |
| 338 | } |
| 339 | static DEVICE_ATTR_RO(port_destid); |
| 340 | |
| 341 | static ssize_t sys_size_show(struct device *dev, struct device_attribute *attr, |
| 342 | char *buf) |
| 343 | { |
| 344 | struct rio_mport *mport = to_rio_mport(dev); |
| 345 | |
| 346 | if (mport) |
| 347 | return sprintf(buf, "%u\n", mport->sys_size); |
| 348 | else |
| 349 | return -ENODEV; |
| 350 | } |
| 351 | static DEVICE_ATTR_RO(sys_size); |
| 352 | |
| 353 | static struct attribute *rio_mport_attrs[] = { |
| 354 | &dev_attr_port_destid.attr, |
| 355 | &dev_attr_sys_size.attr, |
| 356 | NULL, |
| 357 | }; |
| 358 | |
| 359 | static const struct attribute_group rio_mport_group = { |
| 360 | .attrs = rio_mport_attrs, |
| 361 | }; |
| 362 | |
| 363 | const struct attribute_group *rio_mport_groups[] = { |
| 364 | &rio_mport_group, |
| 365 | NULL, |
| 366 | }; |