Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 IBM Corp. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version |
| 7 | * 2 of the License, or (at your option) any later version. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/device.h> |
| 12 | #include <linux/sysfs.h> |
Ian Munsie | b087e61 | 2015-02-04 19:09:01 +1100 | [diff] [blame] | 13 | #include <linux/pci_regs.h> |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 14 | |
| 15 | #include "cxl.h" |
| 16 | |
| 17 | #define to_afu_chardev_m(d) dev_get_drvdata(d) |
| 18 | |
| 19 | /********* Adapter attributes **********************************************/ |
| 20 | |
| 21 | static ssize_t caia_version_show(struct device *device, |
| 22 | struct device_attribute *attr, |
| 23 | char *buf) |
| 24 | { |
| 25 | struct cxl *adapter = to_cxl_adapter(device); |
| 26 | |
| 27 | return scnprintf(buf, PAGE_SIZE, "%i.%i\n", adapter->caia_major, |
| 28 | adapter->caia_minor); |
| 29 | } |
| 30 | |
| 31 | static ssize_t psl_revision_show(struct device *device, |
| 32 | struct device_attribute *attr, |
| 33 | char *buf) |
| 34 | { |
| 35 | struct cxl *adapter = to_cxl_adapter(device); |
| 36 | |
| 37 | return scnprintf(buf, PAGE_SIZE, "%i\n", adapter->psl_rev); |
| 38 | } |
| 39 | |
| 40 | static ssize_t base_image_show(struct device *device, |
| 41 | struct device_attribute *attr, |
| 42 | char *buf) |
| 43 | { |
| 44 | struct cxl *adapter = to_cxl_adapter(device); |
| 45 | |
| 46 | return scnprintf(buf, PAGE_SIZE, "%i\n", adapter->base_image); |
| 47 | } |
| 48 | |
| 49 | static ssize_t image_loaded_show(struct device *device, |
| 50 | struct device_attribute *attr, |
| 51 | char *buf) |
| 52 | { |
| 53 | struct cxl *adapter = to_cxl_adapter(device); |
| 54 | |
| 55 | if (adapter->user_image_loaded) |
| 56 | return scnprintf(buf, PAGE_SIZE, "user\n"); |
| 57 | return scnprintf(buf, PAGE_SIZE, "factory\n"); |
| 58 | } |
| 59 | |
Ryan Grimm | 62fa19d | 2015-01-19 11:52:51 -0600 | [diff] [blame] | 60 | static ssize_t reset_adapter_store(struct device *device, |
| 61 | struct device_attribute *attr, |
| 62 | const char *buf, size_t count) |
| 63 | { |
| 64 | struct cxl *adapter = to_cxl_adapter(device); |
| 65 | int rc; |
| 66 | int val; |
| 67 | |
| 68 | rc = sscanf(buf, "%i", &val); |
| 69 | if ((rc != 1) || (val != 1)) |
| 70 | return -EINVAL; |
| 71 | |
| 72 | if ((rc = cxl_reset(adapter))) |
| 73 | return rc; |
| 74 | return count; |
| 75 | } |
| 76 | |
Ryan Grimm | 95bc11b | 2015-01-19 11:52:49 -0600 | [diff] [blame] | 77 | static ssize_t load_image_on_perst_show(struct device *device, |
| 78 | struct device_attribute *attr, |
| 79 | char *buf) |
| 80 | { |
| 81 | struct cxl *adapter = to_cxl_adapter(device); |
| 82 | |
| 83 | if (!adapter->perst_loads_image) |
| 84 | return scnprintf(buf, PAGE_SIZE, "none\n"); |
| 85 | |
| 86 | if (adapter->perst_select_user) |
| 87 | return scnprintf(buf, PAGE_SIZE, "user\n"); |
| 88 | return scnprintf(buf, PAGE_SIZE, "factory\n"); |
| 89 | } |
| 90 | |
| 91 | static ssize_t load_image_on_perst_store(struct device *device, |
| 92 | struct device_attribute *attr, |
| 93 | const char *buf, size_t count) |
| 94 | { |
| 95 | struct cxl *adapter = to_cxl_adapter(device); |
| 96 | int rc; |
| 97 | |
| 98 | if (!strncmp(buf, "none", 4)) |
| 99 | adapter->perst_loads_image = false; |
| 100 | else if (!strncmp(buf, "user", 4)) { |
| 101 | adapter->perst_select_user = true; |
| 102 | adapter->perst_loads_image = true; |
| 103 | } else if (!strncmp(buf, "factory", 7)) { |
| 104 | adapter->perst_select_user = false; |
| 105 | adapter->perst_loads_image = true; |
| 106 | } else |
| 107 | return -EINVAL; |
| 108 | |
| 109 | if ((rc = cxl_update_image_control(adapter))) |
| 110 | return rc; |
| 111 | |
| 112 | return count; |
| 113 | } |
| 114 | |
Daniel Axtens | 13e68d8 | 2015-08-14 17:41:25 +1000 | [diff] [blame] | 115 | static ssize_t perst_reloads_same_image_show(struct device *device, |
| 116 | struct device_attribute *attr, |
| 117 | char *buf) |
| 118 | { |
| 119 | struct cxl *adapter = to_cxl_adapter(device); |
| 120 | |
| 121 | return scnprintf(buf, PAGE_SIZE, "%i\n", adapter->perst_same_image); |
| 122 | } |
| 123 | |
| 124 | static ssize_t perst_reloads_same_image_store(struct device *device, |
| 125 | struct device_attribute *attr, |
| 126 | const char *buf, size_t count) |
| 127 | { |
| 128 | struct cxl *adapter = to_cxl_adapter(device); |
| 129 | int rc; |
| 130 | int val; |
| 131 | |
| 132 | rc = sscanf(buf, "%i", &val); |
| 133 | if ((rc != 1) || !(val == 1 || val == 0)) |
| 134 | return -EINVAL; |
| 135 | |
| 136 | adapter->perst_same_image = (val == 1 ? true : false); |
| 137 | return count; |
| 138 | } |
| 139 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 140 | static struct device_attribute adapter_attrs[] = { |
| 141 | __ATTR_RO(caia_version), |
| 142 | __ATTR_RO(psl_revision), |
| 143 | __ATTR_RO(base_image), |
| 144 | __ATTR_RO(image_loaded), |
Ryan Grimm | 95bc11b | 2015-01-19 11:52:49 -0600 | [diff] [blame] | 145 | __ATTR_RW(load_image_on_perst), |
Daniel Axtens | 13e68d8 | 2015-08-14 17:41:25 +1000 | [diff] [blame] | 146 | __ATTR_RW(perst_reloads_same_image), |
Ryan Grimm | 62fa19d | 2015-01-19 11:52:51 -0600 | [diff] [blame] | 147 | __ATTR(reset, S_IWUSR, NULL, reset_adapter_store), |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 148 | }; |
| 149 | |
| 150 | |
| 151 | /********* AFU master specific attributes **********************************/ |
| 152 | |
| 153 | static ssize_t mmio_size_show_master(struct device *device, |
| 154 | struct device_attribute *attr, |
| 155 | char *buf) |
| 156 | { |
| 157 | struct cxl_afu *afu = to_afu_chardev_m(device); |
| 158 | |
| 159 | return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->adapter->ps_size); |
| 160 | } |
| 161 | |
| 162 | static ssize_t pp_mmio_off_show(struct device *device, |
| 163 | struct device_attribute *attr, |
| 164 | char *buf) |
| 165 | { |
| 166 | struct cxl_afu *afu = to_afu_chardev_m(device); |
| 167 | |
| 168 | return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->pp_offset); |
| 169 | } |
| 170 | |
| 171 | static ssize_t pp_mmio_len_show(struct device *device, |
| 172 | struct device_attribute *attr, |
| 173 | char *buf) |
| 174 | { |
| 175 | struct cxl_afu *afu = to_afu_chardev_m(device); |
| 176 | |
| 177 | return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->pp_size); |
| 178 | } |
| 179 | |
| 180 | static struct device_attribute afu_master_attrs[] = { |
| 181 | __ATTR(mmio_size, S_IRUGO, mmio_size_show_master, NULL), |
| 182 | __ATTR_RO(pp_mmio_off), |
| 183 | __ATTR_RO(pp_mmio_len), |
| 184 | }; |
| 185 | |
| 186 | |
| 187 | /********* AFU attributes **************************************************/ |
| 188 | |
| 189 | static ssize_t mmio_size_show(struct device *device, |
| 190 | struct device_attribute *attr, |
| 191 | char *buf) |
| 192 | { |
| 193 | struct cxl_afu *afu = to_cxl_afu(device); |
| 194 | |
| 195 | if (afu->pp_size) |
| 196 | return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->pp_size); |
| 197 | return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->adapter->ps_size); |
| 198 | } |
| 199 | |
| 200 | static ssize_t reset_store_afu(struct device *device, |
| 201 | struct device_attribute *attr, |
| 202 | const char *buf, size_t count) |
| 203 | { |
| 204 | struct cxl_afu *afu = to_cxl_afu(device); |
| 205 | int rc; |
| 206 | |
| 207 | /* Not safe to reset if it is currently in use */ |
Ian Munsie | ee41d11 | 2014-12-08 19:17:55 +1100 | [diff] [blame] | 208 | mutex_lock(&afu->contexts_lock); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 209 | if (!idr_is_empty(&afu->contexts_idr)) { |
| 210 | rc = -EBUSY; |
| 211 | goto err; |
| 212 | } |
| 213 | |
Michael Neuling | b12994f | 2015-05-27 16:07:09 +1000 | [diff] [blame] | 214 | if ((rc = __cxl_afu_reset(afu))) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 215 | goto err; |
| 216 | |
| 217 | rc = count; |
| 218 | err: |
Ian Munsie | ee41d11 | 2014-12-08 19:17:55 +1100 | [diff] [blame] | 219 | mutex_unlock(&afu->contexts_lock); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 220 | return rc; |
| 221 | } |
| 222 | |
| 223 | static ssize_t irqs_min_show(struct device *device, |
| 224 | struct device_attribute *attr, |
| 225 | char *buf) |
| 226 | { |
| 227 | struct cxl_afu *afu = to_cxl_afu(device); |
| 228 | |
| 229 | return scnprintf(buf, PAGE_SIZE, "%i\n", afu->pp_irqs); |
| 230 | } |
| 231 | |
| 232 | static ssize_t irqs_max_show(struct device *device, |
| 233 | struct device_attribute *attr, |
| 234 | char *buf) |
| 235 | { |
| 236 | struct cxl_afu *afu = to_cxl_afu(device); |
| 237 | |
| 238 | return scnprintf(buf, PAGE_SIZE, "%i\n", afu->irqs_max); |
| 239 | } |
| 240 | |
| 241 | static ssize_t irqs_max_store(struct device *device, |
| 242 | struct device_attribute *attr, |
| 243 | const char *buf, size_t count) |
| 244 | { |
| 245 | struct cxl_afu *afu = to_cxl_afu(device); |
| 246 | ssize_t ret; |
| 247 | int irqs_max; |
| 248 | |
| 249 | ret = sscanf(buf, "%i", &irqs_max); |
| 250 | if (ret != 1) |
| 251 | return -EINVAL; |
| 252 | |
| 253 | if (irqs_max < afu->pp_irqs) |
| 254 | return -EINVAL; |
| 255 | |
| 256 | if (irqs_max > afu->adapter->user_irqs) |
| 257 | return -EINVAL; |
| 258 | |
| 259 | afu->irqs_max = irqs_max; |
| 260 | return count; |
| 261 | } |
| 262 | |
| 263 | static ssize_t modes_supported_show(struct device *device, |
| 264 | struct device_attribute *attr, char *buf) |
| 265 | { |
| 266 | struct cxl_afu *afu = to_cxl_afu(device); |
| 267 | char *p = buf, *end = buf + PAGE_SIZE; |
| 268 | |
| 269 | if (afu->modes_supported & CXL_MODE_DEDICATED) |
| 270 | p += scnprintf(p, end - p, "dedicated_process\n"); |
| 271 | if (afu->modes_supported & CXL_MODE_DIRECTED) |
| 272 | p += scnprintf(p, end - p, "afu_directed\n"); |
| 273 | return (p - buf); |
| 274 | } |
| 275 | |
| 276 | static ssize_t prefault_mode_show(struct device *device, |
| 277 | struct device_attribute *attr, |
| 278 | char *buf) |
| 279 | { |
| 280 | struct cxl_afu *afu = to_cxl_afu(device); |
| 281 | |
| 282 | switch (afu->prefault_mode) { |
| 283 | case CXL_PREFAULT_WED: |
| 284 | return scnprintf(buf, PAGE_SIZE, "work_element_descriptor\n"); |
| 285 | case CXL_PREFAULT_ALL: |
| 286 | return scnprintf(buf, PAGE_SIZE, "all\n"); |
| 287 | default: |
| 288 | return scnprintf(buf, PAGE_SIZE, "none\n"); |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | static ssize_t prefault_mode_store(struct device *device, |
| 293 | struct device_attribute *attr, |
| 294 | const char *buf, size_t count) |
| 295 | { |
| 296 | struct cxl_afu *afu = to_cxl_afu(device); |
| 297 | enum prefault_modes mode = -1; |
| 298 | |
| 299 | if (!strncmp(buf, "work_element_descriptor", 23)) |
| 300 | mode = CXL_PREFAULT_WED; |
| 301 | if (!strncmp(buf, "all", 3)) |
| 302 | mode = CXL_PREFAULT_ALL; |
| 303 | if (!strncmp(buf, "none", 4)) |
| 304 | mode = CXL_PREFAULT_NONE; |
| 305 | |
| 306 | if (mode == -1) |
| 307 | return -EINVAL; |
| 308 | |
| 309 | afu->prefault_mode = mode; |
| 310 | return count; |
| 311 | } |
| 312 | |
| 313 | static ssize_t mode_show(struct device *device, |
| 314 | struct device_attribute *attr, |
| 315 | char *buf) |
| 316 | { |
| 317 | struct cxl_afu *afu = to_cxl_afu(device); |
| 318 | |
| 319 | if (afu->current_mode == CXL_MODE_DEDICATED) |
| 320 | return scnprintf(buf, PAGE_SIZE, "dedicated_process\n"); |
| 321 | if (afu->current_mode == CXL_MODE_DIRECTED) |
| 322 | return scnprintf(buf, PAGE_SIZE, "afu_directed\n"); |
| 323 | return scnprintf(buf, PAGE_SIZE, "none\n"); |
| 324 | } |
| 325 | |
| 326 | static ssize_t mode_store(struct device *device, struct device_attribute *attr, |
| 327 | const char *buf, size_t count) |
| 328 | { |
| 329 | struct cxl_afu *afu = to_cxl_afu(device); |
| 330 | int old_mode, mode = -1; |
| 331 | int rc = -EBUSY; |
| 332 | |
| 333 | /* can't change this if we have a user */ |
Ian Munsie | ee41d11 | 2014-12-08 19:17:55 +1100 | [diff] [blame] | 334 | mutex_lock(&afu->contexts_lock); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 335 | if (!idr_is_empty(&afu->contexts_idr)) |
| 336 | goto err; |
| 337 | |
| 338 | if (!strncmp(buf, "dedicated_process", 17)) |
| 339 | mode = CXL_MODE_DEDICATED; |
| 340 | if (!strncmp(buf, "afu_directed", 12)) |
| 341 | mode = CXL_MODE_DIRECTED; |
| 342 | if (!strncmp(buf, "none", 4)) |
| 343 | mode = 0; |
| 344 | |
| 345 | if (mode == -1) { |
| 346 | rc = -EINVAL; |
| 347 | goto err; |
| 348 | } |
| 349 | |
| 350 | /* |
| 351 | * cxl_afu_deactivate_mode needs to be done outside the lock, prevent |
| 352 | * other contexts coming in before we are ready: |
| 353 | */ |
| 354 | old_mode = afu->current_mode; |
| 355 | afu->current_mode = 0; |
| 356 | afu->num_procs = 0; |
| 357 | |
Ian Munsie | ee41d11 | 2014-12-08 19:17:55 +1100 | [diff] [blame] | 358 | mutex_unlock(&afu->contexts_lock); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 359 | |
| 360 | if ((rc = _cxl_afu_deactivate_mode(afu, old_mode))) |
| 361 | return rc; |
| 362 | if ((rc = cxl_afu_activate_mode(afu, mode))) |
| 363 | return rc; |
| 364 | |
| 365 | return count; |
| 366 | err: |
Ian Munsie | ee41d11 | 2014-12-08 19:17:55 +1100 | [diff] [blame] | 367 | mutex_unlock(&afu->contexts_lock); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 368 | return rc; |
| 369 | } |
| 370 | |
| 371 | static ssize_t api_version_show(struct device *device, |
| 372 | struct device_attribute *attr, |
| 373 | char *buf) |
| 374 | { |
| 375 | return scnprintf(buf, PAGE_SIZE, "%i\n", CXL_API_VERSION); |
| 376 | } |
| 377 | |
| 378 | static ssize_t api_version_compatible_show(struct device *device, |
| 379 | struct device_attribute *attr, |
| 380 | char *buf) |
| 381 | { |
| 382 | return scnprintf(buf, PAGE_SIZE, "%i\n", CXL_API_VERSION_COMPATIBLE); |
| 383 | } |
| 384 | |
Vaibhav Jain | e36f6fe | 2015-05-22 10:56:05 +0530 | [diff] [blame] | 385 | static ssize_t afu_eb_read(struct file *filp, struct kobject *kobj, |
| 386 | struct bin_attribute *bin_attr, char *buf, |
| 387 | loff_t off, size_t count) |
| 388 | { |
Geliang Tang | 85016ff | 2016-01-13 23:30:09 +0800 | [diff] [blame] | 389 | struct cxl_afu *afu = to_cxl_afu(kobj_to_dev(kobj)); |
Vaibhav Jain | e36f6fe | 2015-05-22 10:56:05 +0530 | [diff] [blame] | 390 | |
| 391 | return cxl_afu_read_err_buffer(afu, buf, off, count); |
| 392 | } |
| 393 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 394 | static struct device_attribute afu_attrs[] = { |
| 395 | __ATTR_RO(mmio_size), |
| 396 | __ATTR_RO(irqs_min), |
| 397 | __ATTR_RW(irqs_max), |
| 398 | __ATTR_RO(modes_supported), |
| 399 | __ATTR_RW(mode), |
| 400 | __ATTR_RW(prefault_mode), |
| 401 | __ATTR_RO(api_version), |
| 402 | __ATTR_RO(api_version_compatible), |
| 403 | __ATTR(reset, S_IWUSR, NULL, reset_store_afu), |
| 404 | }; |
| 405 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 406 | int cxl_sysfs_adapter_add(struct cxl *adapter) |
| 407 | { |
| 408 | int i, rc; |
| 409 | |
| 410 | for (i = 0; i < ARRAY_SIZE(adapter_attrs); i++) { |
| 411 | if ((rc = device_create_file(&adapter->dev, &adapter_attrs[i]))) |
| 412 | goto err; |
| 413 | } |
| 414 | return 0; |
| 415 | err: |
| 416 | for (i--; i >= 0; i--) |
| 417 | device_remove_file(&adapter->dev, &adapter_attrs[i]); |
| 418 | return rc; |
| 419 | } |
| 420 | void cxl_sysfs_adapter_remove(struct cxl *adapter) |
| 421 | { |
| 422 | int i; |
| 423 | |
| 424 | for (i = 0; i < ARRAY_SIZE(adapter_attrs); i++) |
| 425 | device_remove_file(&adapter->dev, &adapter_attrs[i]); |
| 426 | } |
| 427 | |
Ian Munsie | b087e61 | 2015-02-04 19:09:01 +1100 | [diff] [blame] | 428 | struct afu_config_record { |
| 429 | struct kobject kobj; |
| 430 | struct bin_attribute config_attr; |
| 431 | struct list_head list; |
| 432 | int cr; |
| 433 | u16 device; |
| 434 | u16 vendor; |
| 435 | u32 class; |
| 436 | }; |
| 437 | |
| 438 | #define to_cr(obj) container_of(obj, struct afu_config_record, kobj) |
| 439 | |
| 440 | static ssize_t vendor_show(struct kobject *kobj, |
| 441 | struct kobj_attribute *attr, char *buf) |
| 442 | { |
| 443 | struct afu_config_record *cr = to_cr(kobj); |
| 444 | |
| 445 | return scnprintf(buf, PAGE_SIZE, "0x%.4x\n", cr->vendor); |
| 446 | } |
| 447 | |
| 448 | static ssize_t device_show(struct kobject *kobj, |
| 449 | struct kobj_attribute *attr, char *buf) |
| 450 | { |
| 451 | struct afu_config_record *cr = to_cr(kobj); |
| 452 | |
| 453 | return scnprintf(buf, PAGE_SIZE, "0x%.4x\n", cr->device); |
| 454 | } |
| 455 | |
| 456 | static ssize_t class_show(struct kobject *kobj, |
| 457 | struct kobj_attribute *attr, char *buf) |
| 458 | { |
| 459 | struct afu_config_record *cr = to_cr(kobj); |
| 460 | |
| 461 | return scnprintf(buf, PAGE_SIZE, "0x%.6x\n", cr->class); |
| 462 | } |
| 463 | |
| 464 | static ssize_t afu_read_config(struct file *filp, struct kobject *kobj, |
| 465 | struct bin_attribute *bin_attr, char *buf, |
| 466 | loff_t off, size_t count) |
| 467 | { |
| 468 | struct afu_config_record *cr = to_cr(kobj); |
Geliang Tang | 85016ff | 2016-01-13 23:30:09 +0800 | [diff] [blame] | 469 | struct cxl_afu *afu = to_cxl_afu(kobj_to_dev(kobj->parent)); |
Ian Munsie | b087e61 | 2015-02-04 19:09:01 +1100 | [diff] [blame] | 470 | |
Vladimir Zapolskiy | acb921a | 2015-07-27 00:18:46 +0300 | [diff] [blame] | 471 | u64 i, j, val; |
Ian Munsie | b087e61 | 2015-02-04 19:09:01 +1100 | [diff] [blame] | 472 | |
| 473 | for (i = 0; i < count;) { |
| 474 | val = cxl_afu_cr_read64(afu, cr->cr, off & ~0x7); |
| 475 | for (j = off & 0x7; j < 8 && i < count; i++, j++, off++) |
| 476 | buf[i] = (val >> (j * 8)) & 0xff; |
| 477 | } |
| 478 | |
| 479 | return count; |
| 480 | } |
| 481 | |
| 482 | static struct kobj_attribute vendor_attribute = |
| 483 | __ATTR_RO(vendor); |
| 484 | static struct kobj_attribute device_attribute = |
| 485 | __ATTR_RO(device); |
| 486 | static struct kobj_attribute class_attribute = |
| 487 | __ATTR_RO(class); |
| 488 | |
| 489 | static struct attribute *afu_cr_attrs[] = { |
| 490 | &vendor_attribute.attr, |
| 491 | &device_attribute.attr, |
| 492 | &class_attribute.attr, |
| 493 | NULL, |
| 494 | }; |
| 495 | |
| 496 | static void release_afu_config_record(struct kobject *kobj) |
| 497 | { |
| 498 | struct afu_config_record *cr = to_cr(kobj); |
| 499 | |
| 500 | kfree(cr); |
| 501 | } |
| 502 | |
| 503 | static struct kobj_type afu_config_record_type = { |
| 504 | .sysfs_ops = &kobj_sysfs_ops, |
| 505 | .release = release_afu_config_record, |
| 506 | .default_attrs = afu_cr_attrs, |
| 507 | }; |
| 508 | |
| 509 | static struct afu_config_record *cxl_sysfs_afu_new_cr(struct cxl_afu *afu, int cr_idx) |
| 510 | { |
| 511 | struct afu_config_record *cr; |
| 512 | int rc; |
| 513 | |
| 514 | cr = kzalloc(sizeof(struct afu_config_record), GFP_KERNEL); |
| 515 | if (!cr) |
| 516 | return ERR_PTR(-ENOMEM); |
| 517 | |
| 518 | cr->cr = cr_idx; |
| 519 | cr->device = cxl_afu_cr_read16(afu, cr_idx, PCI_DEVICE_ID); |
| 520 | cr->vendor = cxl_afu_cr_read16(afu, cr_idx, PCI_VENDOR_ID); |
| 521 | cr->class = cxl_afu_cr_read32(afu, cr_idx, PCI_CLASS_REVISION) >> 8; |
| 522 | |
| 523 | /* |
| 524 | * Export raw AFU PCIe like config record. For now this is read only by |
| 525 | * root - we can expand that later to be readable by non-root and maybe |
| 526 | * even writable provided we have a good use-case. Once we suport |
| 527 | * exposing AFUs through a virtual PHB they will get that for free from |
| 528 | * Linux' PCI infrastructure, but until then it's not clear that we |
| 529 | * need it for anything since the main use case is just identifying |
| 530 | * AFUs, which can be done via the vendor, device and class attributes. |
| 531 | */ |
| 532 | sysfs_bin_attr_init(&cr->config_attr); |
| 533 | cr->config_attr.attr.name = "config"; |
| 534 | cr->config_attr.attr.mode = S_IRUSR; |
| 535 | cr->config_attr.size = afu->crs_len; |
| 536 | cr->config_attr.read = afu_read_config; |
| 537 | |
| 538 | rc = kobject_init_and_add(&cr->kobj, &afu_config_record_type, |
| 539 | &afu->dev.kobj, "cr%i", cr->cr); |
| 540 | if (rc) |
| 541 | goto err; |
| 542 | |
| 543 | rc = sysfs_create_bin_file(&cr->kobj, &cr->config_attr); |
| 544 | if (rc) |
| 545 | goto err1; |
| 546 | |
| 547 | rc = kobject_uevent(&cr->kobj, KOBJ_ADD); |
| 548 | if (rc) |
| 549 | goto err2; |
| 550 | |
| 551 | return cr; |
| 552 | err2: |
| 553 | sysfs_remove_bin_file(&cr->kobj, &cr->config_attr); |
| 554 | err1: |
| 555 | kobject_put(&cr->kobj); |
| 556 | return ERR_PTR(rc); |
| 557 | err: |
| 558 | kfree(cr); |
| 559 | return ERR_PTR(rc); |
| 560 | } |
| 561 | |
| 562 | void cxl_sysfs_afu_remove(struct cxl_afu *afu) |
| 563 | { |
| 564 | struct afu_config_record *cr, *tmp; |
| 565 | int i; |
| 566 | |
Vaibhav Jain | e36f6fe | 2015-05-22 10:56:05 +0530 | [diff] [blame] | 567 | /* remove the err buffer bin attribute */ |
| 568 | if (afu->eb_len) |
| 569 | device_remove_bin_file(&afu->dev, &afu->attr_eb); |
| 570 | |
Ian Munsie | b087e61 | 2015-02-04 19:09:01 +1100 | [diff] [blame] | 571 | for (i = 0; i < ARRAY_SIZE(afu_attrs); i++) |
| 572 | device_remove_file(&afu->dev, &afu_attrs[i]); |
| 573 | |
| 574 | list_for_each_entry_safe(cr, tmp, &afu->crs, list) { |
| 575 | sysfs_remove_bin_file(&cr->kobj, &cr->config_attr); |
| 576 | kobject_put(&cr->kobj); |
| 577 | } |
| 578 | } |
| 579 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 580 | int cxl_sysfs_afu_add(struct cxl_afu *afu) |
| 581 | { |
Ian Munsie | b087e61 | 2015-02-04 19:09:01 +1100 | [diff] [blame] | 582 | struct afu_config_record *cr; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 583 | int i, rc; |
| 584 | |
Ian Munsie | b087e61 | 2015-02-04 19:09:01 +1100 | [diff] [blame] | 585 | INIT_LIST_HEAD(&afu->crs); |
| 586 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 587 | for (i = 0; i < ARRAY_SIZE(afu_attrs); i++) { |
| 588 | if ((rc = device_create_file(&afu->dev, &afu_attrs[i]))) |
| 589 | goto err; |
| 590 | } |
| 591 | |
Vaibhav Jain | e36f6fe | 2015-05-22 10:56:05 +0530 | [diff] [blame] | 592 | /* conditionally create the add the binary file for error info buffer */ |
| 593 | if (afu->eb_len) { |
Vaibhav Jain | d6eb71a | 2015-09-23 08:37:59 +0530 | [diff] [blame] | 594 | sysfs_attr_init(&afu->attr_eb.attr); |
| 595 | |
Vaibhav Jain | e36f6fe | 2015-05-22 10:56:05 +0530 | [diff] [blame] | 596 | afu->attr_eb.attr.name = "afu_err_buff"; |
| 597 | afu->attr_eb.attr.mode = S_IRUGO; |
| 598 | afu->attr_eb.size = afu->eb_len; |
| 599 | afu->attr_eb.read = afu_eb_read; |
| 600 | |
| 601 | rc = device_create_bin_file(&afu->dev, &afu->attr_eb); |
| 602 | if (rc) { |
| 603 | dev_err(&afu->dev, |
| 604 | "Unable to create eb attr for the afu. Err(%d)\n", |
| 605 | rc); |
| 606 | goto err; |
| 607 | } |
| 608 | } |
| 609 | |
Ian Munsie | b087e61 | 2015-02-04 19:09:01 +1100 | [diff] [blame] | 610 | for (i = 0; i < afu->crs_num; i++) { |
| 611 | cr = cxl_sysfs_afu_new_cr(afu, i); |
| 612 | if (IS_ERR(cr)) { |
| 613 | rc = PTR_ERR(cr); |
| 614 | goto err1; |
| 615 | } |
| 616 | list_add(&cr->list, &afu->crs); |
| 617 | } |
| 618 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 619 | return 0; |
| 620 | |
Ian Munsie | b087e61 | 2015-02-04 19:09:01 +1100 | [diff] [blame] | 621 | err1: |
| 622 | cxl_sysfs_afu_remove(afu); |
| 623 | return rc; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 624 | err: |
Vaibhav Jain | e36f6fe | 2015-05-22 10:56:05 +0530 | [diff] [blame] | 625 | /* reset the eb_len as we havent created the bin attr */ |
| 626 | afu->eb_len = 0; |
| 627 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 628 | for (i--; i >= 0; i--) |
| 629 | device_remove_file(&afu->dev, &afu_attrs[i]); |
| 630 | return rc; |
| 631 | } |
| 632 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 633 | int cxl_sysfs_afu_m_add(struct cxl_afu *afu) |
| 634 | { |
| 635 | int i, rc; |
| 636 | |
| 637 | for (i = 0; i < ARRAY_SIZE(afu_master_attrs); i++) { |
| 638 | if ((rc = device_create_file(afu->chardev_m, &afu_master_attrs[i]))) |
| 639 | goto err; |
| 640 | } |
| 641 | |
| 642 | return 0; |
| 643 | |
| 644 | err: |
| 645 | for (i--; i >= 0; i--) |
| 646 | device_remove_file(afu->chardev_m, &afu_master_attrs[i]); |
| 647 | return rc; |
| 648 | } |
| 649 | |
| 650 | void cxl_sysfs_afu_m_remove(struct cxl_afu *afu) |
| 651 | { |
| 652 | int i; |
| 653 | |
| 654 | for (i = 0; i < ARRAY_SIZE(afu_master_attrs); i++) |
| 655 | device_remove_file(afu->chardev_m, &afu_master_attrs[i]); |
| 656 | } |