Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 1 | /* |
| 2 | * The file intends to implement the platform dependent EEH operations on pseries. |
| 3 | * Actually, the pseries platform is built based on RTAS heavily. That means the |
| 4 | * pseries platform dependent EEH operations will be built on RTAS calls. The functions |
| 5 | * are devired from arch/powerpc/platforms/pseries/eeh.c and necessary cleanup has |
| 6 | * been done. |
| 7 | * |
| 8 | * Copyright Benjamin Herrenschmidt & Gavin Shan, IBM Corporation 2011. |
| 9 | * Copyright IBM Corporation 2001, 2005, 2006 |
| 10 | * Copyright Dave Engebretsen & Todd Inglett 2001 |
| 11 | * Copyright Linas Vepstas 2005, 2006 |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License as published by |
| 15 | * the Free Software Foundation; either version 2 of the License, or |
| 16 | * (at your option) any later version. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with this program; if not, write to the Free Software |
| 25 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 26 | */ |
| 27 | |
| 28 | #include <linux/atomic.h> |
| 29 | #include <linux/delay.h> |
| 30 | #include <linux/export.h> |
| 31 | #include <linux/init.h> |
| 32 | #include <linux/list.h> |
| 33 | #include <linux/of.h> |
| 34 | #include <linux/pci.h> |
| 35 | #include <linux/proc_fs.h> |
| 36 | #include <linux/rbtree.h> |
| 37 | #include <linux/sched.h> |
| 38 | #include <linux/seq_file.h> |
| 39 | #include <linux/spinlock.h> |
| 40 | |
| 41 | #include <asm/eeh.h> |
| 42 | #include <asm/eeh_event.h> |
| 43 | #include <asm/io.h> |
| 44 | #include <asm/machdep.h> |
| 45 | #include <asm/ppc-pci.h> |
| 46 | #include <asm/rtas.h> |
| 47 | |
Gavin Shan | e2af155 | 2012-02-27 20:03:54 +0000 | [diff] [blame] | 48 | /* RTAS tokens */ |
| 49 | static int ibm_set_eeh_option; |
| 50 | static int ibm_set_slot_reset; |
| 51 | static int ibm_read_slot_reset_state; |
| 52 | static int ibm_read_slot_reset_state2; |
| 53 | static int ibm_slot_error_detail; |
| 54 | static int ibm_get_config_addr_info; |
| 55 | static int ibm_get_config_addr_info2; |
| 56 | static int ibm_configure_bridge; |
| 57 | static int ibm_configure_pe; |
| 58 | |
Gavin Shan | 8d63329 | 2012-02-27 20:04:00 +0000 | [diff] [blame^] | 59 | /* |
| 60 | * Buffer for reporting slot-error-detail rtas calls. Its here |
| 61 | * in BSS, and not dynamically alloced, so that it ends up in |
| 62 | * RMO where RTAS can access it. |
| 63 | */ |
| 64 | static unsigned char slot_errbuf[RTAS_ERROR_LOG_MAX]; |
| 65 | static DEFINE_SPINLOCK(slot_errbuf_lock); |
| 66 | static int eeh_error_buf_size; |
| 67 | |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 68 | /** |
| 69 | * pseries_eeh_init - EEH platform dependent initialization |
| 70 | * |
| 71 | * EEH platform dependent initialization on pseries. |
| 72 | */ |
| 73 | static int pseries_eeh_init(void) |
| 74 | { |
Gavin Shan | e2af155 | 2012-02-27 20:03:54 +0000 | [diff] [blame] | 75 | /* figure out EEH RTAS function call tokens */ |
| 76 | ibm_set_eeh_option = rtas_token("ibm,set-eeh-option"); |
| 77 | ibm_set_slot_reset = rtas_token("ibm,set-slot-reset"); |
| 78 | ibm_read_slot_reset_state2 = rtas_token("ibm,read-slot-reset-state2"); |
| 79 | ibm_read_slot_reset_state = rtas_token("ibm,read-slot-reset-state"); |
| 80 | ibm_slot_error_detail = rtas_token("ibm,slot-error-detail"); |
| 81 | ibm_get_config_addr_info2 = rtas_token("ibm,get-config-addr-info2"); |
| 82 | ibm_get_config_addr_info = rtas_token("ibm,get-config-addr-info"); |
| 83 | ibm_configure_pe = rtas_token("ibm,configure-pe"); |
| 84 | ibm_configure_bridge = rtas_token ("ibm,configure-bridge"); |
| 85 | |
| 86 | /* necessary sanity check */ |
| 87 | if (ibm_set_eeh_option == RTAS_UNKNOWN_SERVICE) { |
| 88 | pr_warning("%s: RTAS service <ibm,set-eeh-option> invalid\n", |
| 89 | __func__); |
| 90 | return -EINVAL; |
| 91 | } else if (ibm_set_slot_reset == RTAS_UNKNOWN_SERVICE) { |
| 92 | pr_warning("%s: RTAS service <ibm, set-slot-reset> invalid\n", |
| 93 | __func__); |
| 94 | return -EINVAL; |
| 95 | } else if (ibm_read_slot_reset_state2 == RTAS_UNKNOWN_SERVICE && |
| 96 | ibm_read_slot_reset_state == RTAS_UNKNOWN_SERVICE) { |
| 97 | pr_warning("%s: RTAS service <ibm,read-slot-reset-state2> and " |
| 98 | "<ibm,read-slot-reset-state> invalid\n", |
| 99 | __func__); |
| 100 | return -EINVAL; |
| 101 | } else if (ibm_slot_error_detail == RTAS_UNKNOWN_SERVICE) { |
| 102 | pr_warning("%s: RTAS service <ibm,slot-error-detail> invalid\n", |
| 103 | __func__); |
| 104 | return -EINVAL; |
| 105 | } else if (ibm_get_config_addr_info2 == RTAS_UNKNOWN_SERVICE && |
| 106 | ibm_get_config_addr_info == RTAS_UNKNOWN_SERVICE) { |
| 107 | pr_warning("%s: RTAS service <ibm,get-config-addr-info2> and " |
| 108 | "<ibm,get-config-addr-info> invalid\n", |
| 109 | __func__); |
| 110 | return -EINVAL; |
| 111 | } else if (ibm_configure_pe == RTAS_UNKNOWN_SERVICE && |
| 112 | ibm_configure_bridge == RTAS_UNKNOWN_SERVICE) { |
| 113 | pr_warning("%s: RTAS service <ibm,configure-pe> and " |
| 114 | "<ibm,configure-bridge> invalid\n", |
| 115 | __func__); |
| 116 | return -EINVAL; |
| 117 | } |
| 118 | |
Gavin Shan | 8d63329 | 2012-02-27 20:04:00 +0000 | [diff] [blame^] | 119 | /* Initialize error log lock and size */ |
| 120 | spin_lock_init(&slot_errbuf_lock); |
| 121 | eeh_error_buf_size = rtas_token("rtas-error-log-max"); |
| 122 | if (eeh_error_buf_size == RTAS_UNKNOWN_SERVICE) { |
| 123 | pr_warning("%s: unknown EEH error log size\n", |
| 124 | __func__); |
| 125 | eeh_error_buf_size = 1024; |
| 126 | } else if (eeh_error_buf_size > RTAS_ERROR_LOG_MAX) { |
| 127 | pr_warning("%s: EEH error log size %d exceeds the maximal %d\n", |
| 128 | __func__, eeh_error_buf_size, RTAS_ERROR_LOG_MAX); |
| 129 | eeh_error_buf_size = RTAS_ERROR_LOG_MAX; |
| 130 | } |
| 131 | |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 132 | return 0; |
| 133 | } |
| 134 | |
| 135 | /** |
| 136 | * pseries_eeh_set_option - Initialize EEH or MMIO/DMA reenable |
| 137 | * @dn: device node |
| 138 | * @option: operation to be issued |
| 139 | * |
| 140 | * The function is used to control the EEH functionality globally. |
| 141 | * Currently, following options are support according to PAPR: |
| 142 | * Enable EEH, Disable EEH, Enable MMIO and Enable DMA |
| 143 | */ |
| 144 | static int pseries_eeh_set_option(struct device_node *dn, int option) |
| 145 | { |
Gavin Shan | 8fb8f70 | 2012-02-27 20:03:55 +0000 | [diff] [blame] | 146 | int ret = 0; |
| 147 | struct pci_dn *pdn; |
| 148 | const u32 *reg; |
| 149 | int config_addr; |
| 150 | |
| 151 | pdn = PCI_DN(dn); |
| 152 | |
| 153 | /* |
| 154 | * When we're enabling or disabling EEH functioality on |
| 155 | * the particular PE, the PE config address is possibly |
| 156 | * unavailable. Therefore, we have to figure it out from |
| 157 | * the FDT node. |
| 158 | */ |
| 159 | switch (option) { |
| 160 | case EEH_OPT_DISABLE: |
| 161 | case EEH_OPT_ENABLE: |
| 162 | reg = of_get_property(dn, "reg", NULL); |
| 163 | config_addr = reg[0]; |
| 164 | break; |
| 165 | |
| 166 | case EEH_OPT_THAW_MMIO: |
| 167 | case EEH_OPT_THAW_DMA: |
| 168 | config_addr = pdn->eeh_config_addr; |
| 169 | if (pdn->eeh_pe_config_addr) |
| 170 | config_addr = pdn->eeh_pe_config_addr; |
| 171 | break; |
| 172 | |
| 173 | default: |
| 174 | pr_err("%s: Invalid option %d\n", |
| 175 | __func__, option); |
| 176 | return -EINVAL; |
| 177 | } |
| 178 | |
| 179 | ret = rtas_call(ibm_set_eeh_option, 4, 1, NULL, |
| 180 | config_addr, BUID_HI(pdn->phb->buid), |
| 181 | BUID_LO(pdn->phb->buid), option); |
| 182 | |
| 183 | return ret; |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | /** |
| 187 | * pseries_eeh_get_pe_addr - Retrieve PE address |
| 188 | * @dn: device node |
| 189 | * |
| 190 | * Retrieve the assocated PE address. Actually, there're 2 RTAS |
| 191 | * function calls dedicated for the purpose. We need implement |
| 192 | * it through the new function and then the old one. Besides, |
| 193 | * you should make sure the config address is figured out from |
| 194 | * FDT node before calling the function. |
| 195 | * |
| 196 | * It's notable that zero'ed return value means invalid PE config |
| 197 | * address. |
| 198 | */ |
| 199 | static int pseries_eeh_get_pe_addr(struct device_node *dn) |
| 200 | { |
Gavin Shan | c8c29b3 | 2012-02-27 20:03:56 +0000 | [diff] [blame] | 201 | struct pci_dn *pdn; |
| 202 | int ret = 0; |
| 203 | int rets[3]; |
| 204 | |
| 205 | pdn = PCI_DN(dn); |
| 206 | |
| 207 | if (ibm_get_config_addr_info2 != RTAS_UNKNOWN_SERVICE) { |
| 208 | /* |
| 209 | * First of all, we need to make sure there has one PE |
| 210 | * associated with the device. Otherwise, PE address is |
| 211 | * meaningless. |
| 212 | */ |
| 213 | ret = rtas_call(ibm_get_config_addr_info2, 4, 2, rets, |
| 214 | pdn->eeh_config_addr, BUID_HI(pdn->phb->buid), |
| 215 | BUID_LO(pdn->phb->buid), 1); |
| 216 | if (ret || (rets[0] == 0)) |
| 217 | return 0; |
| 218 | |
| 219 | /* Retrieve the associated PE config address */ |
| 220 | ret = rtas_call(ibm_get_config_addr_info2, 4, 2, rets, |
| 221 | pdn->eeh_config_addr, BUID_HI(pdn->phb->buid), |
| 222 | BUID_LO(pdn->phb->buid), 0); |
| 223 | if (ret) { |
| 224 | pr_warning("%s: Failed to get PE address for %s\n", |
| 225 | __func__, dn->full_name); |
| 226 | return 0; |
| 227 | } |
| 228 | |
| 229 | return rets[0]; |
| 230 | } |
| 231 | |
| 232 | if (ibm_get_config_addr_info != RTAS_UNKNOWN_SERVICE) { |
| 233 | ret = rtas_call(ibm_get_config_addr_info, 4, 2, rets, |
| 234 | pdn->eeh_config_addr, BUID_HI(pdn->phb->buid), |
| 235 | BUID_LO(pdn->phb->buid), 0); |
| 236 | if (ret) { |
| 237 | pr_warning("%s: Failed to get PE address for %s\n", |
| 238 | __func__, dn->full_name); |
| 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | return rets[0]; |
| 243 | } |
| 244 | |
| 245 | return ret; |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 246 | } |
| 247 | |
| 248 | /** |
| 249 | * pseries_eeh_get_state - Retrieve PE state |
| 250 | * @dn: PE associated device node |
| 251 | * @state: return value |
| 252 | * |
| 253 | * Retrieve the state of the specified PE. On RTAS compliant |
| 254 | * pseries platform, there already has one dedicated RTAS function |
| 255 | * for the purpose. It's notable that the associated PE config address |
| 256 | * might be ready when calling the function. Therefore, endeavour to |
| 257 | * use the PE config address if possible. Further more, there're 2 |
| 258 | * RTAS calls for the purpose, we need to try the new one and back |
| 259 | * to the old one if the new one couldn't work properly. |
| 260 | */ |
| 261 | static int pseries_eeh_get_state(struct device_node *dn, int *state) |
| 262 | { |
Gavin Shan | eb594a4 | 2012-02-27 20:03:57 +0000 | [diff] [blame] | 263 | struct pci_dn *pdn; |
| 264 | int config_addr; |
| 265 | int ret; |
| 266 | int rets[4]; |
| 267 | int result; |
| 268 | |
| 269 | /* Figure out PE config address if possible */ |
| 270 | pdn = PCI_DN(dn); |
| 271 | config_addr = pdn->eeh_config_addr; |
| 272 | if (pdn->eeh_pe_config_addr) |
| 273 | config_addr = pdn->eeh_pe_config_addr; |
| 274 | |
| 275 | if (ibm_read_slot_reset_state2 != RTAS_UNKNOWN_SERVICE) { |
| 276 | ret = rtas_call(ibm_read_slot_reset_state2, 3, 4, rets, |
| 277 | config_addr, BUID_HI(pdn->phb->buid), |
| 278 | BUID_LO(pdn->phb->buid)); |
| 279 | } else if (ibm_read_slot_reset_state != RTAS_UNKNOWN_SERVICE) { |
| 280 | /* Fake PE unavailable info */ |
| 281 | rets[2] = 0; |
| 282 | ret = rtas_call(ibm_read_slot_reset_state, 3, 3, rets, |
| 283 | config_addr, BUID_HI(pdn->phb->buid), |
| 284 | BUID_LO(pdn->phb->buid)); |
| 285 | } else { |
| 286 | return EEH_STATE_NOT_SUPPORT; |
| 287 | } |
| 288 | |
| 289 | if (ret) |
| 290 | return ret; |
| 291 | |
| 292 | /* Parse the result out */ |
| 293 | result = 0; |
| 294 | if (rets[1]) { |
| 295 | switch(rets[0]) { |
| 296 | case 0: |
| 297 | result &= ~EEH_STATE_RESET_ACTIVE; |
| 298 | result |= EEH_STATE_MMIO_ACTIVE; |
| 299 | result |= EEH_STATE_DMA_ACTIVE; |
| 300 | break; |
| 301 | case 1: |
| 302 | result |= EEH_STATE_RESET_ACTIVE; |
| 303 | result |= EEH_STATE_MMIO_ACTIVE; |
| 304 | result |= EEH_STATE_DMA_ACTIVE; |
| 305 | break; |
| 306 | case 2: |
| 307 | result &= ~EEH_STATE_RESET_ACTIVE; |
| 308 | result &= ~EEH_STATE_MMIO_ACTIVE; |
| 309 | result &= ~EEH_STATE_DMA_ACTIVE; |
| 310 | break; |
| 311 | case 4: |
| 312 | result &= ~EEH_STATE_RESET_ACTIVE; |
| 313 | result &= ~EEH_STATE_MMIO_ACTIVE; |
| 314 | result &= ~EEH_STATE_DMA_ACTIVE; |
| 315 | result |= EEH_STATE_MMIO_ENABLED; |
| 316 | break; |
| 317 | case 5: |
| 318 | if (rets[2]) { |
| 319 | if (state) *state = rets[2]; |
| 320 | result = EEH_STATE_UNAVAILABLE; |
| 321 | } else { |
| 322 | result = EEH_STATE_NOT_SUPPORT; |
| 323 | } |
| 324 | default: |
| 325 | result = EEH_STATE_NOT_SUPPORT; |
| 326 | } |
| 327 | } else { |
| 328 | result = EEH_STATE_NOT_SUPPORT; |
| 329 | } |
| 330 | |
| 331 | return result; |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 332 | } |
| 333 | |
| 334 | /** |
| 335 | * pseries_eeh_reset - Reset the specified PE |
| 336 | * @dn: PE associated device node |
| 337 | * @option: reset option |
| 338 | * |
| 339 | * Reset the specified PE |
| 340 | */ |
| 341 | static int pseries_eeh_reset(struct device_node *dn, int option) |
| 342 | { |
Gavin Shan | 2652481 | 2012-02-27 20:03:59 +0000 | [diff] [blame] | 343 | struct pci_dn *pdn; |
| 344 | int config_addr; |
| 345 | int ret; |
| 346 | |
| 347 | /* Figure out PE address */ |
| 348 | pdn = PCI_DN(dn); |
| 349 | config_addr = pdn->eeh_config_addr; |
| 350 | if (pdn->eeh_pe_config_addr) |
| 351 | config_addr = pdn->eeh_pe_config_addr; |
| 352 | |
| 353 | /* Reset PE through RTAS call */ |
| 354 | ret = rtas_call(ibm_set_slot_reset, 4, 1, NULL, |
| 355 | config_addr, BUID_HI(pdn->phb->buid), |
| 356 | BUID_LO(pdn->phb->buid), option); |
| 357 | |
| 358 | /* If fundamental-reset not supported, try hot-reset */ |
| 359 | if (option == EEH_RESET_FUNDAMENTAL && |
| 360 | ret == -8) { |
| 361 | ret = rtas_call(ibm_set_slot_reset, 4, 1, NULL, |
| 362 | config_addr, BUID_HI(pdn->phb->buid), |
| 363 | BUID_LO(pdn->phb->buid), EEH_RESET_HOT); |
| 364 | } |
| 365 | |
| 366 | return ret; |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 367 | } |
| 368 | |
| 369 | /** |
| 370 | * pseries_eeh_wait_state - Wait for PE state |
| 371 | * @dn: PE associated device node |
| 372 | * @max_wait: maximal period in microsecond |
| 373 | * |
| 374 | * Wait for the state of associated PE. It might take some time |
| 375 | * to retrieve the PE's state. |
| 376 | */ |
| 377 | static int pseries_eeh_wait_state(struct device_node *dn, int max_wait) |
| 378 | { |
Gavin Shan | b0e5f74 | 2012-02-27 20:03:58 +0000 | [diff] [blame] | 379 | int ret; |
| 380 | int mwait; |
| 381 | |
| 382 | /* |
| 383 | * According to PAPR, the state of PE might be temporarily |
| 384 | * unavailable. Under the circumstance, we have to wait |
| 385 | * for indicated time determined by firmware. The maximal |
| 386 | * wait time is 5 minutes, which is acquired from the original |
| 387 | * EEH implementation. Also, the original implementation |
| 388 | * also defined the minimal wait time as 1 second. |
| 389 | */ |
| 390 | #define EEH_STATE_MIN_WAIT_TIME (1000) |
| 391 | #define EEH_STATE_MAX_WAIT_TIME (300 * 1000) |
| 392 | |
| 393 | while (1) { |
| 394 | ret = pseries_eeh_get_state(dn, &mwait); |
| 395 | |
| 396 | /* |
| 397 | * If the PE's state is temporarily unavailable, |
| 398 | * we have to wait for the specified time. Otherwise, |
| 399 | * the PE's state will be returned immediately. |
| 400 | */ |
| 401 | if (ret != EEH_STATE_UNAVAILABLE) |
| 402 | return ret; |
| 403 | |
| 404 | if (max_wait <= 0) { |
| 405 | pr_warning("%s: Timeout when getting PE's state (%d)\n", |
| 406 | __func__, max_wait); |
| 407 | return EEH_STATE_NOT_SUPPORT; |
| 408 | } |
| 409 | |
| 410 | if (mwait <= 0) { |
| 411 | pr_warning("%s: Firmware returned bad wait value %d\n", |
| 412 | __func__, mwait); |
| 413 | mwait = EEH_STATE_MIN_WAIT_TIME; |
| 414 | } else if (mwait > EEH_STATE_MAX_WAIT_TIME) { |
| 415 | pr_warning("%s: Firmware returned too long wait value %d\n", |
| 416 | __func__, mwait); |
| 417 | mwait = EEH_STATE_MAX_WAIT_TIME; |
| 418 | } |
| 419 | |
| 420 | max_wait -= mwait; |
| 421 | msleep(mwait); |
| 422 | } |
| 423 | |
| 424 | return EEH_STATE_NOT_SUPPORT; |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 425 | } |
| 426 | |
| 427 | /** |
| 428 | * pseries_eeh_get_log - Retrieve error log |
| 429 | * @dn: device node |
| 430 | * @severity: temporary or permanent error log |
| 431 | * @drv_log: driver log to be combined with retrieved error log |
| 432 | * @len: length of driver log |
| 433 | * |
| 434 | * Retrieve the temporary or permanent error from the PE. |
| 435 | * Actually, the error will be retrieved through the dedicated |
| 436 | * RTAS call. |
| 437 | */ |
| 438 | static int pseries_eeh_get_log(struct device_node *dn, int severity, char *drv_log, unsigned long len) |
| 439 | { |
Gavin Shan | 8d63329 | 2012-02-27 20:04:00 +0000 | [diff] [blame^] | 440 | struct pci_dn *pdn; |
| 441 | int config_addr; |
| 442 | unsigned long flags; |
| 443 | int ret; |
| 444 | |
| 445 | pdn = PCI_DN(dn); |
| 446 | spin_lock_irqsave(&slot_errbuf_lock, flags); |
| 447 | memset(slot_errbuf, 0, eeh_error_buf_size); |
| 448 | |
| 449 | /* Figure out the PE address */ |
| 450 | config_addr = pdn->eeh_config_addr; |
| 451 | if (pdn->eeh_pe_config_addr) |
| 452 | config_addr = pdn->eeh_pe_config_addr; |
| 453 | |
| 454 | ret = rtas_call(ibm_slot_error_detail, 8, 1, NULL, config_addr, |
| 455 | BUID_HI(pdn->phb->buid), BUID_LO(pdn->phb->buid), |
| 456 | virt_to_phys(drv_log), len, |
| 457 | virt_to_phys(slot_errbuf), eeh_error_buf_size, |
| 458 | severity); |
| 459 | if (!ret) |
| 460 | log_error(slot_errbuf, ERR_TYPE_RTAS_LOG, 0); |
| 461 | spin_unlock_irqrestore(&slot_errbuf_lock, flags); |
| 462 | |
| 463 | return ret; |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | /** |
| 467 | * pseries_eeh_configure_bridge - Configure PCI bridges in the indicated PE |
| 468 | * @dn: PE associated device node |
| 469 | * |
| 470 | * The function will be called to reconfigure the bridges included |
| 471 | * in the specified PE so that the mulfunctional PE would be recovered |
| 472 | * again. |
| 473 | */ |
| 474 | static int pseries_eeh_configure_bridge(struct device_node *dn) |
| 475 | { |
| 476 | return 0; |
| 477 | } |
| 478 | |
| 479 | static struct eeh_ops pseries_eeh_ops = { |
| 480 | .name = "pseries", |
| 481 | .init = pseries_eeh_init, |
| 482 | .set_option = pseries_eeh_set_option, |
| 483 | .get_pe_addr = pseries_eeh_get_pe_addr, |
| 484 | .get_state = pseries_eeh_get_state, |
| 485 | .reset = pseries_eeh_reset, |
| 486 | .wait_state = pseries_eeh_wait_state, |
| 487 | .get_log = pseries_eeh_get_log, |
| 488 | .configure_bridge = pseries_eeh_configure_bridge |
| 489 | }; |
| 490 | |
| 491 | /** |
| 492 | * eeh_pseries_init - Register platform dependent EEH operations |
| 493 | * |
| 494 | * EEH initialization on pseries platform. This function should be |
| 495 | * called before any EEH related functions. |
| 496 | */ |
| 497 | int __init eeh_pseries_init(void) |
| 498 | { |
| 499 | return eeh_ops_register(&pseries_eeh_ops); |
| 500 | } |