| 1 | |
| 2 | |
| 3 | * IBM Hot Plug Controller Driver
|
| 4 | *
|
| 5 | * Written By: Chuck Cole, Jyoti Shah, Tong Yu, Irene Zubarev, IBM Corporation
|
| 6 | *
|
| 7 | * Copyright (C) 2001,2003 Greg Kroah-Hartman ([email protected])
|
| 8 | * Copyright (C) 2001-2003 IBM Corp.
|
| 9 | *
|
| 10 | * All rights reserved.
|
| 11 | *
|
| 12 | * Send feedback to <[email protected]>
|
| 13 | *
|
| 14 |
|
| 15 |
|
| 16 | #include <linux/init.h>
|
| 17 | #include <linux/module.h>
|
| 18 | #include <linux/slab.h>
|
| 19 | #include <linux/pci.h>
|
| 20 | #include <linux/interrupt.h>
|
| 21 | #include <linux/delay.h>
|
| 22 | #include <linux/wait.h>
|
| 23 | #include "../pci.h"
|
| 24 | #include <asm/pci_x86.h>
|
| 25 | #include <asm/io_apic.h>
|
| 26 | #include "ibmphp.h"
|
| 27 |
|
| 28 | #define attn_on(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNON)
|
| 29 | #define attn_off(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNOFF)
|
| 30 | #define attn_LED_blink(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_BLINKLED)
|
| 31 | #define get_ctrl_revision(sl, rev) ibmphp_hpc_readslot(sl, READ_REVLEVEL, rev)
|
| 32 | #define get_hpc_options(sl, opt) ibmphp_hpc_readslot(sl, READ_HPCOPTIONS, opt)
|
| 33 |
|
| 34 | #define DRIVER_VERSION "0.6"
|
| 35 | #define DRIVER_DESC "IBM Hot Plug PCI Controller Driver"
|
| 36 |
|
| 37 | int ibmphp_debug;
|
| 38 |
|
| 39 | static bool debug;
|
| 40 | module_param(debug, bool, S_IRUGO | S_IWUSR);
|
| 41 | MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
|
| 42 | MODULE_LICENSE("GPL");
|
| 43 | MODULE_DESCRIPTION(DRIVER_DESC);
|
| 44 |
|
| 45 | struct pci_bus *ibmphp_pci_bus;
|
| 46 | static int max_slots;
|
| 47 |
|
| 48 | static int irqs[16]; |
| 49 | * tables don't provide default info for empty slots
|
| 50 |
|
| 51 | static int init_flag;
|
| 52 |
|
| 53 | static inline int get_cur_bus_info(struct slot **sl)
|
| 54 | {
|
| 55 | int rc = 1;
|
| 56 | struct slot *slot_cur = *sl;
|
| 57 |
|
| 58 | debug("options = %x\n", slot_cur->ctrl->options);
|
| 59 | debug("revision = %x\n", slot_cur->ctrl->revision);
|
| 60 |
|
| 61 | if (READ_BUS_STATUS(slot_cur->ctrl))
|
| 62 | rc = ibmphp_hpc_readslot(slot_cur, READ_BUSSTATUS, NULL);
|
| 63 |
|
| 64 | if (rc)
|
| 65 | return rc;
|
| 66 |
|
| 67 | slot_cur->bus_on->current_speed = CURRENT_BUS_SPEED(slot_cur->busstatus);
|
| 68 | if (READ_BUS_MODE(slot_cur->ctrl))
|
| 69 | slot_cur->bus_on->current_bus_mode =
|
| 70 | CURRENT_BUS_MODE(slot_cur->busstatus);
|
| 71 | else
|
| 72 | slot_cur->bus_on->current_bus_mode = 0xFF;
|
| 73 |
|
| 74 | debug("busstatus = %x, bus_speed = %x, bus_mode = %x\n",
|
| 75 | slot_cur->busstatus,
|
| 76 | slot_cur->bus_on->current_speed,
|
| 77 | slot_cur->bus_on->current_bus_mode);
|
| 78 |
|
| 79 | *sl = slot_cur;
|
| 80 | return 0;
|
| 81 | }
|
| 82 |
|
| 83 | static inline int slot_update(struct slot **sl)
|
| 84 | {
|
| 85 | int rc;
|
| 86 | rc = ibmphp_hpc_readslot(*sl, READ_ALLSTAT, NULL);
|
| 87 | if (rc)
|
| 88 | return rc;
|
| 89 | if (!init_flag)
|
| 90 | rc = get_cur_bus_info(sl);
|
| 91 | return rc;
|
| 92 | }
|
| 93 |
|
| 94 | static int __init get_max_slots(void)
|
| 95 | {
|
| 96 | struct slot *slot_cur;
|
| 97 | u8 slot_count = 0;
|
| 98 |
|
| 99 | list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
|
| 100 |
|
| 101 | slot_count = max(slot_count, slot_cur->number);
|
| 102 | }
|
| 103 | return slot_count;
|
| 104 | }
|
| 105 |
|
| 106 | |
| 107 | * called from initialization of the slot structures. It will also assign
|
| 108 | * interrupt numbers per each slot.
|
| 109 | * Parameters: struct slot
|
| 110 | * Returns 0 or errors
|
| 111 |
|
| 112 | int ibmphp_init_devno(struct slot **cur_slot)
|
| 113 | {
|
| 114 | struct irq_routing_table *rtable;
|
| 115 | int len;
|
| 116 | int loop;
|
| 117 | int i;
|
| 118 |
|
| 119 | rtable = pcibios_get_irq_routing_table();
|
| 120 | if (!rtable) {
|
| 121 | err("no BIOS routing table...\n");
|
| 122 | return -ENOMEM;
|
| 123 | }
|
| 124 |
|
| 125 | len = (rtable->size - sizeof(struct irq_routing_table)) /
|
| 126 | sizeof(struct irq_info);
|
| 127 |
|
| 128 | if (!len) {
|
| 129 | kfree(rtable);
|
| 130 | return -1;
|
| 131 | }
|
| 132 | for (loop = 0; loop < len; loop++) {
|
| 133 | if ((*cur_slot)->number == rtable->slots[loop].slot &&
|
| 134 | (*cur_slot)->bus == rtable->slots[loop].bus) {
|
| 135 | (*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn);
|
| 136 | for (i = 0; i < 4; i++)
|
| 137 | (*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus,
|
| 138 | (int) (*cur_slot)->device, i);
|
| 139 |
|
| 140 | debug("(*cur_slot)->irq[0] = %x\n",
|
| 141 | (*cur_slot)->irq[0]);
|
| 142 | debug("(*cur_slot)->irq[1] = %x\n",
|
| 143 | (*cur_slot)->irq[1]);
|
| 144 | debug("(*cur_slot)->irq[2] = %x\n",
|
| 145 | (*cur_slot)->irq[2]);
|
| 146 | debug("(*cur_slot)->irq[3] = %x\n",
|
| 147 | (*cur_slot)->irq[3]);
|
| 148 |
|
| 149 | debug("rtable->exclusive_irqs = %x\n",
|
| 150 | rtable->exclusive_irqs);
|
| 151 | debug("rtable->slots[loop].irq[0].bitmap = %x\n",
|
| 152 | rtable->slots[loop].irq[0].bitmap);
|
| 153 | debug("rtable->slots[loop].irq[1].bitmap = %x\n",
|
| 154 | rtable->slots[loop].irq[1].bitmap);
|
| 155 | debug("rtable->slots[loop].irq[2].bitmap = %x\n",
|
| 156 | rtable->slots[loop].irq[2].bitmap);
|
| 157 | debug("rtable->slots[loop].irq[3].bitmap = %x\n",
|
| 158 | rtable->slots[loop].irq[3].bitmap);
|
| 159 |
|
| 160 | debug("rtable->slots[loop].irq[0].link = %x\n",
|
| 161 | rtable->slots[loop].irq[0].link);
|
| 162 | debug("rtable->slots[loop].irq[1].link = %x\n",
|
| 163 | rtable->slots[loop].irq[1].link);
|
| 164 | debug("rtable->slots[loop].irq[2].link = %x\n",
|
| 165 | rtable->slots[loop].irq[2].link);
|
| 166 | debug("rtable->slots[loop].irq[3].link = %x\n",
|
| 167 | rtable->slots[loop].irq[3].link);
|
| 168 | debug("end of init_devno\n");
|
| 169 | kfree(rtable);
|
| 170 | return 0;
|
| 171 | }
|
| 172 | }
|
| 173 |
|
| 174 | kfree(rtable);
|
| 175 | return -1;
|
| 176 | }
|
| 177 |
|
| 178 | static inline int power_on(struct slot *slot_cur)
|
| 179 | {
|
| 180 | u8 cmd = HPC_SLOT_ON;
|
| 181 | int retval;
|
| 182 |
|
| 183 | retval = ibmphp_hpc_writeslot(slot_cur, cmd);
|
| 184 | if (retval) {
|
| 185 | err("power on failed\n");
|
| 186 | return retval;
|
| 187 | }
|
| 188 | if (CTLR_RESULT(slot_cur->ctrl->status)) {
|
| 189 | err("command not completed successfully in power_on\n");
|
| 190 | return -EIO;
|
| 191 | }
|
| 192 | msleep(3000);
|
| 193 | return 0;
|
| 194 | }
|
| 195 |
|
| 196 | static inline int power_off(struct slot *slot_cur)
|
| 197 | {
|
| 198 | u8 cmd = HPC_SLOT_OFF;
|
| 199 | int retval;
|
| 200 |
|
| 201 | retval = ibmphp_hpc_writeslot(slot_cur, cmd);
|
| 202 | if (retval) {
|
| 203 | err("power off failed\n");
|
| 204 | return retval;
|
| 205 | }
|
| 206 | if (CTLR_RESULT(slot_cur->ctrl->status)) {
|
| 207 | err("command not completed successfully in power_off\n");
|
| 208 | retval = -EIO;
|
| 209 | }
|
| 210 | return retval;
|
| 211 | }
|
| 212 |
|
| 213 | static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
|
| 214 | {
|
| 215 | int rc = 0;
|
| 216 | struct slot *pslot;
|
| 217 | u8 cmd = 0x00;
|
| 218 |
|
| 219 | debug("set_attention_status - Entry hotplug_slot[%lx] value[%x]\n",
|
| 220 | (ulong) hotplug_slot, value);
|
| 221 | ibmphp_lock_operations();
|
| 222 |
|
| 223 |
|
| 224 | if (hotplug_slot) {
|
| 225 | switch (value) {
|
| 226 | case HPC_SLOT_ATTN_OFF:
|
| 227 | cmd = HPC_SLOT_ATTNOFF;
|
| 228 | break;
|
| 229 | case HPC_SLOT_ATTN_ON:
|
| 230 | cmd = HPC_SLOT_ATTNON;
|
| 231 | break;
|
| 232 | case HPC_SLOT_ATTN_BLINK:
|
| 233 | cmd = HPC_SLOT_BLINKLED;
|
| 234 | break;
|
| 235 | default:
|
| 236 | rc = -ENODEV;
|
| 237 | err("set_attention_status - Error : invalid input [%x]\n",
|
| 238 | value);
|
| 239 | break;
|
| 240 | }
|
| 241 | if (rc == 0) {
|
| 242 | pslot = to_slot(hotplug_slot);
|
| 243 | rc = ibmphp_hpc_writeslot(pslot, cmd);
|
| 244 | }
|
| 245 | } else
|
| 246 | rc = -ENODEV;
|
| 247 |
|
| 248 | ibmphp_unlock_operations();
|
| 249 |
|
| 250 | debug("set_attention_status - Exit rc[%d]\n", rc);
|
| 251 | return rc;
|
| 252 | }
|
| 253 |
|
| 254 | static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
|
| 255 | {
|
| 256 | int rc = -ENODEV;
|
| 257 | struct slot *pslot;
|
| 258 | struct slot myslot;
|
| 259 |
|
| 260 | debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
|
| 261 | (ulong) hotplug_slot, (ulong) value);
|
| 262 |
|
| 263 | ibmphp_lock_operations();
|
| 264 | if (hotplug_slot) {
|
| 265 | pslot = to_slot(hotplug_slot);
|
| 266 | memcpy(&myslot, pslot, sizeof(struct slot));
|
| 267 | rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
|
| 268 | &myslot.status);
|
| 269 | if (!rc)
|
| 270 | rc = ibmphp_hpc_readslot(pslot, READ_EXTSLOTSTATUS,
|
| 271 | &myslot.ext_status);
|
| 272 | if (!rc)
|
| 273 | *value = SLOT_ATTN(myslot.status, myslot.ext_status);
|
| 274 | }
|
| 275 |
|
| 276 | ibmphp_unlock_operations();
|
| 277 | debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value);
|
| 278 | return rc;
|
| 279 | }
|
| 280 |
|
| 281 | static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
|
| 282 | {
|
| 283 | int rc = -ENODEV;
|
| 284 | struct slot *pslot;
|
| 285 | struct slot myslot;
|
| 286 |
|
| 287 | debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
|
| 288 | (ulong) hotplug_slot, (ulong) value);
|
| 289 | ibmphp_lock_operations();
|
| 290 | if (hotplug_slot) {
|
| 291 | pslot = to_slot(hotplug_slot);
|
| 292 | memcpy(&myslot, pslot, sizeof(struct slot));
|
| 293 | rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
|
| 294 | &myslot.status);
|
| 295 | if (!rc)
|
| 296 | *value = SLOT_LATCH(myslot.status);
|
| 297 | }
|
| 298 |
|
| 299 | ibmphp_unlock_operations();
|
| 300 | debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n",
|
| 301 | rc, rc, *value);
|
| 302 | return rc;
|
| 303 | }
|
| 304 |
|
| 305 |
|
| 306 | static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
|
| 307 | {
|
| 308 | int rc = -ENODEV;
|
| 309 | struct slot *pslot;
|
| 310 | struct slot myslot;
|
| 311 |
|
| 312 | debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
|
| 313 | (ulong) hotplug_slot, (ulong) value);
|
| 314 | ibmphp_lock_operations();
|
| 315 | if (hotplug_slot) {
|
| 316 | pslot = to_slot(hotplug_slot);
|
| 317 | memcpy(&myslot, pslot, sizeof(struct slot));
|
| 318 | rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
|
| 319 | &myslot.status);
|
| 320 | if (!rc)
|
| 321 | *value = SLOT_PWRGD(myslot.status);
|
| 322 | }
|
| 323 |
|
| 324 | ibmphp_unlock_operations();
|
| 325 | debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n",
|
| 326 | rc, rc, *value);
|
| 327 | return rc;
|
| 328 | }
|
| 329 |
|
| 330 | static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 *value)
|
| 331 | {
|
| 332 | int rc = -ENODEV;
|
| 333 | struct slot *pslot;
|
| 334 | u8 present;
|
| 335 | struct slot myslot;
|
| 336 |
|
| 337 | debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
|
| 338 | (ulong) hotplug_slot, (ulong) value);
|
| 339 | ibmphp_lock_operations();
|
| 340 | if (hotplug_slot) {
|
| 341 | pslot = to_slot(hotplug_slot);
|
| 342 | memcpy(&myslot, pslot, sizeof(struct slot));
|
| 343 | rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
|
| 344 | &myslot.status);
|
| 345 | if (!rc) {
|
| 346 | present = SLOT_PRESENT(myslot.status);
|
| 347 | if (present == HPC_SLOT_EMPTY)
|
| 348 | *value = 0;
|
| 349 | else
|
| 350 | *value = 1;
|
| 351 | }
|
| 352 | }
|
| 353 |
|
| 354 | ibmphp_unlock_operations();
|
| 355 | debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value);
|
| 356 | return rc;
|
| 357 | }
|
| 358 |
|
| 359 | static int get_max_bus_speed(struct slot *slot)
|
| 360 | {
|
| 361 | int rc = 0;
|
| 362 | u8 mode = 0;
|
| 363 | enum pci_bus_speed speed;
|
| 364 | struct pci_bus *bus = slot->hotplug_slot.pci_slot->bus;
|
| 365 |
|
| 366 | debug("%s - Entry slot[%p]\n", __func__, slot);
|
| 367 |
|
| 368 | ibmphp_lock_operations();
|
| 369 | mode = slot->supported_bus_mode;
|
| 370 | speed = slot->supported_speed;
|
| 371 | ibmphp_unlock_operations();
|
| 372 |
|
| 373 | switch (speed) {
|
| 374 | case BUS_SPEED_33:
|
| 375 | break;
|
| 376 | case BUS_SPEED_66:
|
| 377 | if (mode == BUS_MODE_PCIX)
|
| 378 | speed += 0x01;
|
| 379 | break;
|
| 380 | case BUS_SPEED_100:
|
| 381 | case BUS_SPEED_133:
|
| 382 | speed += 0x01;
|
| 383 | break;
|
| 384 | default:
|
| 385 |
|
| 386 | rc = -ENODEV;
|
| 387 | }
|
| 388 |
|
| 389 | if (!rc)
|
| 390 | bus->max_bus_speed = speed;
|
| 391 |
|
| 392 | debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed);
|
| 393 | return rc;
|
| 394 | }
|
| 395 |
|
| 396 | |
| 397 | * This routine will initialize the ops data structure used in the validate
|
| 398 | * function. It will also power off empty slots that are powered on since BIOS
|
| 399 | * leaves those on, albeit disconnected
|
| 400 | ***************************************************************************
|
| 401 | static int __init init_ops(void)
|
| 402 | {
|
| 403 | struct slot *slot_cur;
|
| 404 | int retval;
|
| 405 | int rc;
|
| 406 |
|
| 407 | list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
|
| 408 | debug("BEFORE GETTING SLOT STATUS, slot # %x\n",
|
| 409 | slot_cur->number);
|
| 410 | if (slot_cur->ctrl->revision == 0xFF)
|
| 411 | if (get_ctrl_revision(slot_cur,
|
| 412 | &slot_cur->ctrl->revision))
|
| 413 | return -1;
|
| 414 |
|
| 415 | if (slot_cur->bus_on->current_speed == 0xFF)
|
| 416 | if (get_cur_bus_info(&slot_cur))
|
| 417 | return -1;
|
| 418 | get_max_bus_speed(slot_cur);
|
| 419 |
|
| 420 | if (slot_cur->ctrl->options == 0xFF)
|
| 421 | if (get_hpc_options(slot_cur, &slot_cur->ctrl->options))
|
| 422 | return -1;
|
| 423 |
|
| 424 | retval = slot_update(&slot_cur);
|
| 425 | if (retval)
|
| 426 | return retval;
|
| 427 |
|
| 428 | debug("status = %x\n", slot_cur->status);
|
| 429 | debug("ext_status = %x\n", slot_cur->ext_status);
|
| 430 | debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status));
|
| 431 | debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status));
|
| 432 | debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status));
|
| 433 |
|
| 434 | if ((SLOT_PWRGD(slot_cur->status)) &&
|
| 435 | !(SLOT_PRESENT(slot_cur->status)) &&
|
| 436 | !(SLOT_LATCH(slot_cur->status))) {
|
| 437 | debug("BEFORE POWER OFF COMMAND\n");
|
| 438 | rc = power_off(slot_cur);
|
| 439 | if (rc)
|
| 440 | return rc;
|
| 441 |
|
| 442 | |
| 443 | * if (retval)
|
| 444 | * return retval;
|
| 445 | * ibmphp_update_slot_info(slot_cur);
|
| 446 |
|
| 447 | }
|
| 448 | }
|
| 449 | init_flag = 0;
|
| 450 | return 0;
|
| 451 | }
|
| 452 |
|
| 453 | |
| 454 | * the operation is valid to perform on that slot
|
| 455 | * Parameters: slot, operation
|
| 456 | * Returns: 0 or error codes
|
| 457 |
|
| 458 | static int validate(struct slot *slot_cur, int opn)
|
| 459 | {
|
| 460 | int number;
|
| 461 | int retval;
|
| 462 |
|
| 463 | if (!slot_cur)
|
| 464 | return -ENODEV;
|
| 465 | number = slot_cur->number;
|
| 466 | if ((number > max_slots) || (number < 0))
|
| 467 | return -EBADSLT;
|
| 468 | debug("slot_number in validate is %d\n", slot_cur->number);
|
| 469 |
|
| 470 | retval = slot_update(&slot_cur);
|
| 471 | if (retval)
|
| 472 | return retval;
|
| 473 |
|
| 474 | switch (opn) {
|
| 475 | case ENABLE:
|
| 476 | if (!(SLOT_PWRGD(slot_cur->status)) &&
|
| 477 | (SLOT_PRESENT(slot_cur->status)) &&
|
| 478 | !(SLOT_LATCH(slot_cur->status)))
|
| 479 | return 0;
|
| 480 | break;
|
| 481 | case DISABLE:
|
| 482 | if ((SLOT_PWRGD(slot_cur->status)) &&
|
| 483 | (SLOT_PRESENT(slot_cur->status)) &&
|
| 484 | !(SLOT_LATCH(slot_cur->status)))
|
| 485 | return 0;
|
| 486 | break;
|
| 487 | default:
|
| 488 | break;
|
| 489 | }
|
| 490 | err("validate failed....\n");
|
| 491 | return -EINVAL;
|
| 492 | }
|
| 493 |
|
| 494 | |
| 495 | * This routine is for updating the data structures in the hotplug core
|
| 496 | * Parameters: struct slot
|
| 497 | * Returns: 0 or error
|
| 498 | ***************************************************************************
|
| 499 | int ibmphp_update_slot_info(struct slot *slot_cur)
|
| 500 | {
|
| 501 | struct pci_bus *bus = slot_cur->hotplug_slot.pci_slot->bus;
|
| 502 | u8 bus_speed;
|
| 503 | u8 mode;
|
| 504 |
|
| 505 | bus_speed = slot_cur->bus_on->current_speed;
|
| 506 | mode = slot_cur->bus_on->current_bus_mode;
|
| 507 |
|
| 508 | switch (bus_speed) {
|
| 509 | case BUS_SPEED_33:
|
| 510 | break;
|
| 511 | case BUS_SPEED_66:
|
| 512 | if (mode == BUS_MODE_PCIX)
|
| 513 | bus_speed += 0x01;
|
| 514 | else if (mode == BUS_MODE_PCI)
|
| 515 | ;
|
| 516 | else
|
| 517 | bus_speed = PCI_SPEED_UNKNOWN;
|
| 518 | break;
|
| 519 | case BUS_SPEED_100:
|
| 520 | case BUS_SPEED_133:
|
| 521 | bus_speed += 0x01;
|
| 522 | break;
|
| 523 | default:
|
| 524 | bus_speed = PCI_SPEED_UNKNOWN;
|
| 525 | }
|
| 526 |
|
| 527 | bus->cur_bus_speed = bus_speed;
|
| 528 | |
| 529 |
|
| 530 | return 0;
|
| 531 | }
|
| 532 |
|
| 533 |
|
| 534 | |
| 535 | * This function will return the pci_func, given bus and devfunc, or NULL. It
|
| 536 | * is called from visit routines
|
| 537 | *****************************************************************************
|
| 538 |
|
| 539 | static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
|
| 540 | {
|
| 541 | struct pci_func *func_cur;
|
| 542 | struct slot *slot_cur;
|
| 543 | list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
|
| 544 | if (slot_cur->func) {
|
| 545 | func_cur = slot_cur->func;
|
| 546 | while (func_cur) {
|
| 547 | if ((func_cur->busno == busno) &&
|
| 548 | (func_cur->device == device) &&
|
| 549 | (func_cur->function == function))
|
| 550 | return func_cur;
|
| 551 | func_cur = func_cur->next;
|
| 552 | }
|
| 553 | }
|
| 554 | }
|
| 555 | return NULL;
|
| 556 | }
|
| 557 |
|
| 558 | |
| 559 | * This routine frees up memory used by struct slot, including
|
| 560 | * the pointers to pci_func, bus, hotplug_slot, controller,
|
| 561 | * and deregistering from the hotplug core
|
| 562 | ************************************************************
|
| 563 | static void free_slots(void)
|
| 564 | {
|
| 565 | struct slot *slot_cur, *next;
|
| 566 |
|
| 567 | debug("%s -- enter\n", __func__);
|
| 568 |
|
| 569 | list_for_each_entry_safe(slot_cur, next, &ibmphp_slot_head,
|
| 570 | ibm_slot_list) {
|
| 571 | pci_hp_del(&slot_cur->hotplug_slot);
|
| 572 | slot_cur->ctrl = NULL;
|
| 573 | slot_cur->bus_on = NULL;
|
| 574 |
|
| 575 | |
| 576 | * We don't want to actually remove the resources,
|
| 577 | * since ibmphp_free_resources() will do just that.
|
| 578 |
|
| 579 | ibmphp_unconfigure_card(&slot_cur, -1);
|
| 580 |
|
| 581 | pci_hp_destroy(&slot_cur->hotplug_slot);
|
| 582 | kfree(slot_cur);
|
| 583 | }
|
| 584 | debug("%s -- exit\n", __func__);
|
| 585 | }
|
| 586 |
|
| 587 | static void ibm_unconfigure_device(struct pci_func *func)
|
| 588 | {
|
| 589 | struct pci_dev *temp;
|
| 590 | u8 j;
|
| 591 |
|
| 592 | debug("inside %s\n", __func__);
|
| 593 | debug("func->device = %x, func->function = %x\n",
|
| 594 | func->device, func->function);
|
| 595 | debug("func->device << 3 | 0x0 = %x\n", func->device << 3 | 0x0);
|
| 596 |
|
| 597 | pci_lock_rescan_remove();
|
| 598 |
|
| 599 | for (j = 0; j < 0x08; j++) {
|
| 600 | temp = pci_get_domain_bus_and_slot(0, func->busno,
|
| 601 | (func->device << 3) | j);
|
| 602 | if (temp) {
|
| 603 | pci_stop_and_remove_bus_device(temp);
|
| 604 | pci_dev_put(temp);
|
| 605 | }
|
| 606 | }
|
| 607 |
|
| 608 | pci_dev_put(func->dev);
|
| 609 |
|
| 610 | pci_unlock_rescan_remove();
|
| 611 | }
|
| 612 |
|
| 613 | |
| 614 | * The following function is to fix kernel bug regarding
|
| 615 | * getting bus entries, here we manually add those primary
|
| 616 | * bus entries to kernel bus structure whenever apply
|
| 617 |
|
| 618 | static u8 bus_structure_fixup(u8 busno)
|
| 619 | {
|
| 620 | struct pci_bus *bus, *b;
|
| 621 | struct pci_dev *dev;
|
| 622 | u16 l;
|
| 623 |
|
| 624 | if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno)))
|
| 625 | return 1;
|
| 626 |
|
| 627 | bus = kmalloc_obj(*bus);
|
| 628 | if (!bus)
|
| 629 | return 1;
|
| 630 |
|
| 631 | dev = kmalloc_obj(*dev);
|
| 632 | if (!dev) {
|
| 633 | kfree(bus);
|
| 634 | return 1;
|
| 635 | }
|
| 636 |
|
| 637 | bus->number = busno;
|
| 638 | bus->ops = ibmphp_pci_bus->ops;
|
| 639 | dev->bus = bus;
|
| 640 | for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) {
|
| 641 | if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) &&
|
| 642 | (l != 0x0000) && (l != 0xffff)) {
|
| 643 | debug("%s - Inside bus_structure_fixup()\n",
|
| 644 | __func__);
|
| 645 | b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
|
| 646 | if (!b)
|
| 647 | continue;
|
| 648 |
|
| 649 | pci_bus_add_devices(b);
|
| 650 | break;
|
| 651 | }
|
| 652 | }
|
| 653 |
|
| 654 | kfree(dev);
|
| 655 | kfree(bus);
|
| 656 |
|
| 657 | return 0;
|
| 658 | }
|
| 659 |
|
| 660 | static int ibm_configure_device(struct pci_func *func)
|
| 661 | {
|
| 662 | struct pci_bus *child;
|
| 663 | int num;
|
| 664 | int flag = 0; |
| 665 | for bridged devices primarily
|
| 666 |
|
| 667 | pci_lock_rescan_remove();
|
| 668 |
|
| 669 | if (!(bus_structure_fixup(func->busno)))
|
| 670 | flag = 1;
|
| 671 | if (func->dev == NULL)
|
| 672 | func->dev = pci_get_domain_bus_and_slot(0, func->busno,
|
| 673 | PCI_DEVFN(func->device, func->function));
|
| 674 |
|
| 675 | if (func->dev == NULL) {
|
| 676 | struct pci_bus *bus = pci_find_bus(0, func->busno);
|
| 677 | if (!bus)
|
| 678 | goto out;
|
| 679 |
|
| 680 | num = pci_scan_slot(bus,
|
| 681 | PCI_DEVFN(func->device, func->function));
|
| 682 | if (num)
|
| 683 | pci_bus_add_devices(bus);
|
| 684 |
|
| 685 | func->dev = pci_get_domain_bus_and_slot(0, func->busno,
|
| 686 | PCI_DEVFN(func->device, func->function));
|
| 687 | if (func->dev == NULL) {
|
| 688 | err("ERROR... : pci_dev still NULL\n");
|
| 689 | goto out;
|
| 690 | }
|
| 691 | }
|
| 692 | if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
|
| 693 | pci_hp_add_bridge(func->dev);
|
| 694 | child = func->dev->subordinate;
|
| 695 | if (child)
|
| 696 | pci_bus_add_devices(child);
|
| 697 | }
|
| 698 |
|
| 699 | out:
|
| 700 | pci_unlock_rescan_remove();
|
| 701 | return 0;
|
| 702 | }
|
| 703 |
|
| 704 | |
| 705 | * Returns whether the bus is empty or not
|
| 706 | ******************************************************
|
| 707 | static int is_bus_empty(struct slot *slot_cur)
|
| 708 | {
|
| 709 | int rc;
|
| 710 | struct slot *tmp_slot;
|
| 711 | u8 i = slot_cur->bus_on->slot_min;
|
| 712 |
|
| 713 | while (i <= slot_cur->bus_on->slot_max) {
|
| 714 | if (i == slot_cur->number) {
|
| 715 | i++;
|
| 716 | continue;
|
| 717 | }
|
| 718 | tmp_slot = ibmphp_get_slot_from_physical_num(i);
|
| 719 | if (!tmp_slot)
|
| 720 | return 0;
|
| 721 | rc = slot_update(&tmp_slot);
|
| 722 | if (rc)
|
| 723 | return 0;
|
| 724 | if (SLOT_PRESENT(tmp_slot->status) &&
|
| 725 | SLOT_PWRGD(tmp_slot->status))
|
| 726 | return 0;
|
| 727 | i++;
|
| 728 | }
|
| 729 | return 1;
|
| 730 | }
|
| 731 |
|
| 732 | |
| 733 | * If the HPC permits and the bus currently empty, tries to set the
|
| 734 | * bus speed and mode at the maximum card and bus capability
|
| 735 | * Parameters: slot
|
| 736 | * Returns: bus is set (0) or error code
|
| 737 | **********************************************************
|
| 738 | static int set_bus(struct slot *slot_cur)
|
| 739 | {
|
| 740 | int rc;
|
| 741 | u8 speed;
|
| 742 | u8 cmd = 0x0;
|
| 743 | int retval;
|
| 744 | static const struct pci_device_id ciobx[] = {
|
| 745 | { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
|
| 746 | { },
|
| 747 | };
|
| 748 |
|
| 749 | debug("%s - entry slot # %d\n", __func__, slot_cur->number);
|
| 750 | if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
|
| 751 | rc = slot_update(&slot_cur);
|
| 752 | if (rc)
|
| 753 | return rc;
|
| 754 | speed = SLOT_SPEED(slot_cur->ext_status);
|
| 755 | debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
|
| 756 | switch (speed) {
|
| 757 | case HPC_SLOT_SPEED_33:
|
| 758 | cmd = HPC_BUS_33CONVMODE;
|
| 759 | break;
|
| 760 | case HPC_SLOT_SPEED_66:
|
| 761 | if (SLOT_PCIX(slot_cur->ext_status)) {
|
| 762 | if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
|
| 763 | (slot_cur->supported_bus_mode == BUS_MODE_PCIX))
|
| 764 | cmd = HPC_BUS_66PCIXMODE;
|
| 765 | else if (!SLOT_BUS_MODE(slot_cur->ext_status))
|
| 766 | |
| 767 | and there's no bus mode mismatch, then
|
| 768 | the adapter supports 66 pci
|
| 769 | cmd = HPC_BUS_66CONVMODE;
|
| 770 | else
|
| 771 | cmd = HPC_BUS_33CONVMODE;
|
| 772 | } else {
|
| 773 | if (slot_cur->supported_speed >= BUS_SPEED_66)
|
| 774 | cmd = HPC_BUS_66CONVMODE;
|
| 775 | else
|
| 776 | cmd = HPC_BUS_33CONVMODE;
|
| 777 | }
|
| 778 | break;
|
| 779 | case HPC_SLOT_SPEED_133:
|
| 780 | switch (slot_cur->supported_speed) {
|
| 781 | case BUS_SPEED_33:
|
| 782 | cmd = HPC_BUS_33CONVMODE;
|
| 783 | break;
|
| 784 | case BUS_SPEED_66:
|
| 785 | if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
|
| 786 | cmd = HPC_BUS_66PCIXMODE;
|
| 787 | else
|
| 788 | cmd = HPC_BUS_66CONVMODE;
|
| 789 | break;
|
| 790 | case BUS_SPEED_100:
|
| 791 | cmd = HPC_BUS_100PCIXMODE;
|
| 792 | break;
|
| 793 | case BUS_SPEED_133:
|
| 794 |
|
| 795 | if (pci_dev_present(ciobx))
|
| 796 | ibmphp_hpc_writeslot(slot_cur,
|
| 797 | HPC_BUS_100PCIXMODE);
|
| 798 | cmd = HPC_BUS_133PCIXMODE;
|
| 799 | break;
|
| 800 | default:
|
| 801 | err("Wrong bus speed\n");
|
| 802 | return -ENODEV;
|
| 803 | }
|
| 804 | break;
|
| 805 | default:
|
| 806 | err("wrong slot speed\n");
|
| 807 | return -ENODEV;
|
| 808 | }
|
| 809 | debug("setting bus speed for slot %d, cmd %x\n",
|
| 810 | slot_cur->number, cmd);
|
| 811 | retval = ibmphp_hpc_writeslot(slot_cur, cmd);
|
| 812 | if (retval) {
|
| 813 | err("setting bus speed failed\n");
|
| 814 | return retval;
|
| 815 | }
|
| 816 | if (CTLR_RESULT(slot_cur->ctrl->status)) {
|
| 817 | err("command not completed successfully in set_bus\n");
|
| 818 | return -EIO;
|
| 819 | }
|
| 820 | }
|
| 821 | |
| 822 | will not need this delay
|
| 823 | msleep(1000);
|
| 824 | debug("%s -Exit\n", __func__);
|
| 825 | return 0;
|
| 826 | }
|
| 827 |
|
| 828 | |
| 829 | * This is used in deciding whether or not to power up the slot.
|
| 830 | * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
|
| 831 | * same bus)
|
| 832 | * Parameters: slot
|
| 833 | * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
|
| 834 |
|
| 835 | static int check_limitations(struct slot *slot_cur)
|
| 836 | {
|
| 837 | u8 i;
|
| 838 | struct slot *tmp_slot;
|
| 839 | u8 count = 0;
|
| 840 | u8 limitation = 0;
|
| 841 |
|
| 842 | for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
|
| 843 | tmp_slot = ibmphp_get_slot_from_physical_num(i);
|
| 844 | if (!tmp_slot)
|
| 845 | return -ENODEV;
|
| 846 | if ((SLOT_PWRGD(tmp_slot->status)) &&
|
| 847 | !(SLOT_CONNECT(tmp_slot->status)))
|
| 848 | count++;
|
| 849 | }
|
| 850 | get_cur_bus_info(&slot_cur);
|
| 851 | switch (slot_cur->bus_on->current_speed) {
|
| 852 | case BUS_SPEED_33:
|
| 853 | limitation = slot_cur->bus_on->slots_at_33_conv;
|
| 854 | break;
|
| 855 | case BUS_SPEED_66:
|
| 856 | if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
|
| 857 | limitation = slot_cur->bus_on->slots_at_66_pcix;
|
| 858 | else
|
| 859 | limitation = slot_cur->bus_on->slots_at_66_conv;
|
| 860 | break;
|
| 861 | case BUS_SPEED_100:
|
| 862 | limitation = slot_cur->bus_on->slots_at_100_pcix;
|
| 863 | break;
|
| 864 | case BUS_SPEED_133:
|
| 865 | limitation = slot_cur->bus_on->slots_at_133_pcix;
|
| 866 | break;
|
| 867 | }
|
| 868 |
|
| 869 | if ((count + 1) > limitation)
|
| 870 | return -EINVAL;
|
| 871 | return 0;
|
| 872 | }
|
| 873 |
|
| 874 | static inline void print_card_capability(struct slot *slot_cur)
|
| 875 | {
|
| 876 | info("capability of the card is ");
|
| 877 | if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
|
| 878 | info(" 133 MHz PCI-X\n");
|
| 879 | else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
|
| 880 | info(" 66 MHz PCI-X\n");
|
| 881 | else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
|
| 882 | info(" 66 MHz PCI\n");
|
| 883 | else
|
| 884 | info(" 33 MHz PCI\n");
|
| 885 |
|
| 886 | }
|
| 887 |
|
| 888 | |
| 889 | * drivers for them.
|
| 890 | * Parameters: hotplug_slot
|
| 891 | * Returns: 0 or failure codes
|
| 892 |
|
| 893 | static int enable_slot(struct hotplug_slot *hs)
|
| 894 | {
|
| 895 | int rc, i, rcpr;
|
| 896 | struct slot *slot_cur;
|
| 897 | u8 function;
|
| 898 | struct pci_func *tmp_func;
|
| 899 |
|
| 900 | ibmphp_lock_operations();
|
| 901 |
|
| 902 | debug("ENABLING SLOT........\n");
|
| 903 | slot_cur = to_slot(hs);
|
| 904 |
|
| 905 | rc = validate(slot_cur, ENABLE);
|
| 906 | if (rc) {
|
| 907 | err("validate function failed\n");
|
| 908 | goto error_nopower;
|
| 909 | }
|
| 910 |
|
| 911 | attn_LED_blink(slot_cur);
|
| 912 |
|
| 913 | rc = set_bus(slot_cur);
|
| 914 | if (rc) {
|
| 915 | err("was not able to set the bus\n");
|
| 916 | goto error_nopower;
|
| 917 | }
|
| 918 |
|
| 919 |
|
| 920 | get_cur_bus_info(&slot_cur);
|
| 921 | debug("the current bus speed right after set_bus = %x\n",
|
| 922 | slot_cur->bus_on->current_speed);
|
| 923 |
|
| 924 |
|
| 925 | rc = check_limitations(slot_cur);
|
| 926 | if (rc) {
|
| 927 | err("Adding this card exceeds the limitations of this bus.\n");
|
| 928 | err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n");
|
| 929 | err("Try hot-adding into another bus\n");
|
| 930 | rc = -EINVAL;
|
| 931 | goto error_nopower;
|
| 932 | }
|
| 933 |
|
| 934 | rc = power_on(slot_cur);
|
| 935 |
|
| 936 | if (rc) {
|
| 937 | err("something wrong when powering up... please see below for details\n");
|
| 938 |
|
| 939 | attn_off(slot_cur);
|
| 940 | attn_on(slot_cur);
|
| 941 | if (slot_update(&slot_cur)) {
|
| 942 | attn_off(slot_cur);
|
| 943 | attn_on(slot_cur);
|
| 944 | rc = -ENODEV;
|
| 945 | goto exit;
|
| 946 | }
|
| 947 |
|
| 948 | if ((SLOT_POWER(slot_cur->status)) &&
|
| 949 | !(SLOT_PWRGD(slot_cur->status)))
|
| 950 | err("power fault occurred trying to power up\n");
|
| 951 | else if (SLOT_BUS_SPEED(slot_cur->status)) {
|
| 952 | err("bus speed mismatch occurred. please check current bus speed and card capability\n");
|
| 953 | print_card_capability(slot_cur);
|
| 954 | } else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
|
| 955 | err("bus mode mismatch occurred. please check current bus mode and card capability\n");
|
| 956 | print_card_capability(slot_cur);
|
| 957 | }
|
| 958 | ibmphp_update_slot_info(slot_cur);
|
| 959 | goto exit;
|
| 960 | }
|
| 961 | debug("after power_on\n");
|
| 962 |
|
| 963 | get_cur_bus_info(&slot_cur);
|
| 964 | debug("the current bus speed right after power_on = %x\n",
|
| 965 | slot_cur->bus_on->current_speed);
|
| 966 |
|
| 967 |
|
| 968 | rc = slot_update(&slot_cur);
|
| 969 | if (rc)
|
| 970 | goto error_power;
|
| 971 |
|
| 972 | rc = -EINVAL;
|
| 973 | if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) {
|
| 974 | err("power fault occurred trying to power up...\n");
|
| 975 | goto error_power;
|
| 976 | }
|
| 977 | if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) {
|
| 978 | err("bus speed mismatch occurred. please check current bus speed and card capability\n");
|
| 979 | print_card_capability(slot_cur);
|
| 980 | goto error_power;
|
| 981 | }
|
| 982 | |
| 983 | * but just in case, for paranoia sake
|
| 984 | if (!(SLOT_POWER(slot_cur->status))) {
|
| 985 | err("power on failed...\n");
|
| 986 | goto error_power;
|
| 987 | }
|
| 988 |
|
| 989 | slot_cur->func = kzalloc_obj(struct pci_func);
|
| 990 | if (!slot_cur->func) {
|
| 991 |
|
| 992 | rc = -ENOMEM;
|
| 993 | goto error_power;
|
| 994 | }
|
| 995 | slot_cur->func->busno = slot_cur->bus;
|
| 996 | slot_cur->func->device = slot_cur->device;
|
| 997 | for (i = 0; i < 4; i++)
|
| 998 | slot_cur->func->irq[i] = slot_cur->irq[i];
|
| 999 |
|
| 1000 | debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
|
| 1001 | slot_cur->bus, slot_cur->device);
|
| 1002 |
|
| 1003 | if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
|
| 1004 | err("configure_card was unsuccessful...\n");
|
| 1005 | |
| 1006 | * just remove references
|
| 1007 | ibmphp_unconfigure_card(&slot_cur, 1);
|
| 1008 | debug("after unconfigure_card\n");
|
| 1009 | slot_cur->func = NULL;
|
| 1010 | rc = -ENOMEM;
|
| 1011 | goto error_power;
|
| 1012 | }
|
| 1013 |
|
| 1014 | function = 0x00;
|
| 1015 | do {
|
| 1016 | tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
|
| 1017 | function++);
|
| 1018 | if (tmp_func && !(tmp_func->dev))
|
| 1019 | ibm_configure_device(tmp_func);
|
| 1020 | } while (tmp_func);
|
| 1021 |
|
| 1022 | attn_off(slot_cur);
|
| 1023 | if (slot_update(&slot_cur)) {
|
| 1024 | rc = -EFAULT;
|
| 1025 | goto exit;
|
| 1026 | }
|
| 1027 | ibmphp_print_test();
|
| 1028 | rc = ibmphp_update_slot_info(slot_cur);
|
| 1029 | exit:
|
| 1030 | ibmphp_unlock_operations();
|
| 1031 | return rc;
|
| 1032 |
|
| 1033 | error_nopower:
|
| 1034 | attn_off(slot_cur);
|
| 1035 | attn_on(slot_cur);
|
| 1036 | error_cont:
|
| 1037 | rcpr = slot_update(&slot_cur);
|
| 1038 | if (rcpr) {
|
| 1039 | rc = rcpr;
|
| 1040 | goto exit;
|
| 1041 | }
|
| 1042 | ibmphp_update_slot_info(slot_cur);
|
| 1043 | goto exit;
|
| 1044 |
|
| 1045 | error_power:
|
| 1046 | attn_off(slot_cur);
|
| 1047 | attn_on(slot_cur);
|
| 1048 | rcpr = power_off(slot_cur);
|
| 1049 | if (rcpr) {
|
| 1050 | rc = rcpr;
|
| 1051 | goto exit;
|
| 1052 | }
|
| 1053 | goto error_cont;
|
| 1054 | }
|
| 1055 |
|
| 1056 | |
| 1057 | * HOT REMOVING ADAPTER CARD *
|
| 1058 | * INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE *
|
| 1059 | * OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE *
|
| 1060 | * DISABLE POWER , *
|
| 1061 | *************************************************************
|
| 1062 | static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
|
| 1063 | {
|
| 1064 | struct slot *slot = to_slot(hotplug_slot);
|
| 1065 | int rc;
|
| 1066 |
|
| 1067 | ibmphp_lock_operations();
|
| 1068 | rc = ibmphp_do_disable_slot(slot);
|
| 1069 | ibmphp_unlock_operations();
|
| 1070 | return rc;
|
| 1071 | }
|
| 1072 |
|
| 1073 | int ibmphp_do_disable_slot(struct slot *slot_cur)
|
| 1074 | {
|
| 1075 | int rc;
|
| 1076 | u8 flag;
|
| 1077 |
|
| 1078 | debug("DISABLING SLOT...\n");
|
| 1079 |
|
| 1080 | if ((slot_cur == NULL) || (slot_cur->ctrl == NULL))
|
| 1081 | return -ENODEV;
|
| 1082 |
|
| 1083 | flag = slot_cur->flag;
|
| 1084 | slot_cur->flag = 1;
|
| 1085 |
|
| 1086 | if (flag == 1) {
|
| 1087 | rc = validate(slot_cur, DISABLE);
|
| 1088 |
|
| 1089 | if (rc)
|
| 1090 | goto error;
|
| 1091 | }
|
| 1092 | attn_LED_blink(slot_cur);
|
| 1093 |
|
| 1094 | if (slot_cur->func == NULL) {
|
| 1095 |
|
| 1096 | slot_cur->func = kzalloc_obj(struct pci_func);
|
| 1097 | if (!slot_cur->func) {
|
| 1098 | rc = -ENOMEM;
|
| 1099 | goto error;
|
| 1100 | }
|
| 1101 | slot_cur->func->busno = slot_cur->bus;
|
| 1102 | slot_cur->func->device = slot_cur->device;
|
| 1103 | }
|
| 1104 |
|
| 1105 | ibm_unconfigure_device(slot_cur->func);
|
| 1106 |
|
| 1107 | |
| 1108 | * If we got here from latch suddenly opening on operating card or
|
| 1109 | * a power fault, there's no power to the card, so cannot
|
| 1110 | * read from it to determine what resources it occupied. This operation
|
| 1111 | * is forbidden anyhow. The best we can do is remove it from kernel
|
| 1112 | * lists at least
|
| 1113 |
|
| 1114 | if (!flag) {
|
| 1115 | attn_off(slot_cur);
|
| 1116 | return 0;
|
| 1117 | }
|
| 1118 |
|
| 1119 | rc = ibmphp_unconfigure_card(&slot_cur, 0);
|
| 1120 | slot_cur->func = NULL;
|
| 1121 | debug("in disable_slot. after unconfigure_card\n");
|
| 1122 | if (rc) {
|
| 1123 | err("could not unconfigure card.\n");
|
| 1124 | goto error;
|
| 1125 | }
|
| 1126 |
|
| 1127 | rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
|
| 1128 | if (rc)
|
| 1129 | goto error;
|
| 1130 |
|
| 1131 | attn_off(slot_cur);
|
| 1132 | rc = slot_update(&slot_cur);
|
| 1133 | if (rc)
|
| 1134 | goto exit;
|
| 1135 |
|
| 1136 | rc = ibmphp_update_slot_info(slot_cur);
|
| 1137 | ibmphp_print_test();
|
| 1138 | exit:
|
| 1139 | return rc;
|
| 1140 |
|
| 1141 | error:
|
| 1142 |
|
| 1143 | attn_off(slot_cur);
|
| 1144 | attn_on(slot_cur);
|
| 1145 | if (slot_update(&slot_cur)) {
|
| 1146 | rc = -EFAULT;
|
| 1147 | goto exit;
|
| 1148 | }
|
| 1149 | if (flag)
|
| 1150 | ibmphp_update_slot_info(slot_cur);
|
| 1151 | goto exit;
|
| 1152 | }
|
| 1153 |
|
| 1154 | const struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
|
| 1155 | .set_attention_status = set_attention_status,
|
| 1156 | .enable_slot = enable_slot,
|
| 1157 | .disable_slot = ibmphp_disable_slot,
|
| 1158 | .hardware_test = NULL,
|
| 1159 | .get_power_status = get_power_status,
|
| 1160 | .get_attention_status = get_attention_status,
|
| 1161 | .get_latch_status = get_latch_status,
|
| 1162 | .get_adapter_status = get_adapter_present,
|
| 1163 | };
|
| 1164 |
|
| 1165 | static void ibmphp_unload(void)
|
| 1166 | {
|
| 1167 | free_slots();
|
| 1168 | debug("after slots\n");
|
| 1169 | ibmphp_free_resources();
|
| 1170 | debug("after resources\n");
|
| 1171 | ibmphp_free_bus_info_queue();
|
| 1172 | debug("after bus info\n");
|
| 1173 | ibmphp_free_ebda_hpc_queue();
|
| 1174 | debug("after ebda hpc\n");
|
| 1175 | ibmphp_free_ebda_pci_rsrc_queue();
|
| 1176 | debug("after ebda pci rsrc\n");
|
| 1177 | kfree(ibmphp_pci_bus);
|
| 1178 | }
|
| 1179 |
|
| 1180 | static int __init ibmphp_init(void)
|
| 1181 | {
|
| 1182 | struct pci_bus *bus;
|
| 1183 | int i = 0;
|
| 1184 | int rc = 0;
|
| 1185 |
|
| 1186 | init_flag = 1;
|
| 1187 |
|
| 1188 | info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
|
| 1189 |
|
| 1190 | ibmphp_pci_bus = kmalloc_obj(*ibmphp_pci_bus);
|
| 1191 | if (!ibmphp_pci_bus) {
|
| 1192 | rc = -ENOMEM;
|
| 1193 | goto exit;
|
| 1194 | }
|
| 1195 |
|
| 1196 | bus = pci_find_bus(0, 0);
|
| 1197 | if (!bus) {
|
| 1198 | err("Can't find the root pci bus, can not continue\n");
|
| 1199 | rc = -ENODEV;
|
| 1200 | goto error;
|
| 1201 | }
|
| 1202 | memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
|
| 1203 |
|
| 1204 | ibmphp_debug = debug;
|
| 1205 |
|
| 1206 | for (i = 0; i < 16; i++)
|
| 1207 | irqs[i] = 0;
|
| 1208 |
|
| 1209 | rc = ibmphp_access_ebda();
|
| 1210 | if (rc)
|
| 1211 | goto error;
|
| 1212 | debug("after ibmphp_access_ebda()\n");
|
| 1213 |
|
| 1214 | rc = ibmphp_rsrc_init();
|
| 1215 | if (rc)
|
| 1216 | goto error;
|
| 1217 | debug("AFTER Resource & EBDA INITIALIZATIONS\n");
|
| 1218 |
|
| 1219 | max_slots = get_max_slots();
|
| 1220 |
|
| 1221 | rc = ibmphp_register_pci();
|
| 1222 | if (rc)
|
| 1223 | goto error;
|
| 1224 |
|
| 1225 | if (init_ops()) {
|
| 1226 | rc = -ENODEV;
|
| 1227 | goto error;
|
| 1228 | }
|
| 1229 |
|
| 1230 | ibmphp_print_test();
|
| 1231 | rc = ibmphp_hpc_start_poll_thread();
|
| 1232 | if (rc)
|
| 1233 | goto error;
|
| 1234 |
|
| 1235 | exit:
|
| 1236 | return rc;
|
| 1237 |
|
| 1238 | error:
|
| 1239 | ibmphp_unload();
|
| 1240 | goto exit;
|
| 1241 | }
|
| 1242 |
|
| 1243 | static void __exit ibmphp_exit(void)
|
| 1244 | {
|
| 1245 | ibmphp_hpc_stop_poll_thread();
|
| 1246 | debug("after polling\n");
|
| 1247 | ibmphp_unload();
|
| 1248 | debug("done\n");
|
| 1249 | }
|
| 1250 |
|
| 1251 | module_init(ibmphp_init);
|
| 1252 | module_exit(ibmphp_exit);
|