ibmphp_core.c 34.2 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
/*
 * IBM Hot Plug Controller Driver
 *
 * Written By: Chuck Cole, Jyoti Shah, Tong Yu, Irene Zubarev, IBM Corporation
 *
 * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
 * Copyright (C) 2001-2003 IBM Corp.
 *
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 * NON INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Send feedback to <gregkh@us.ibm.com>
 *
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/wait.h>
#include "../pci.h"
38
#include <asm/pci_x86.h>		/* for struct irq_routing_table */
Linus Torvalds's avatar
Linus Torvalds committed
39 40 41 42 43 44 45 46 47 48 49 50 51
#include "ibmphp.h"

#define attn_on(sl)  ibmphp_hpc_writeslot (sl, HPC_SLOT_ATTNON)
#define attn_off(sl) ibmphp_hpc_writeslot (sl, HPC_SLOT_ATTNOFF)
#define attn_LED_blink(sl) ibmphp_hpc_writeslot (sl, HPC_SLOT_BLINKLED)
#define get_ctrl_revision(sl, rev) ibmphp_hpc_readslot (sl, READ_REVLEVEL, rev)
#define get_hpc_options(sl, opt) ibmphp_hpc_readslot (sl, READ_HPCOPTIONS, opt)

#define DRIVER_VERSION	"0.6"
#define DRIVER_DESC	"IBM Hot Plug PCI Controller Driver"

int ibmphp_debug;

52
static bool debug;
Linus Torvalds's avatar
Linus Torvalds committed
53 54 55 56 57 58 59 60
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC (debug, "Debugging mode enabled or not");
MODULE_LICENSE ("GPL");
MODULE_DESCRIPTION (DRIVER_DESC);

struct pci_bus *ibmphp_pci_bus;
static int max_slots;

61
static int irqs[16];    /* PIC mode IRQs we're using so far (in case MPS
Linus Torvalds's avatar
Linus Torvalds committed
62 63 64 65 66 67 68 69 70 71 72 73
			 * tables don't provide default info for empty slots */

static int init_flag;

/*
static int get_max_adapter_speed_1 (struct hotplug_slot *, u8 *, u8);

static inline int get_max_adapter_speed (struct hotplug_slot *hs, u8 *value)
{
	return get_max_adapter_speed_1 (hs, value, 1);
}
*/
74
static inline int get_cur_bus_info(struct slot **sl)
Linus Torvalds's avatar
Linus Torvalds committed
75 76 77 78 79
{
	int rc = 1;
	struct slot * slot_cur = *sl;

	debug("options = %x\n", slot_cur->ctrl->options);
80
	debug("revision = %x\n", slot_cur->ctrl->revision);
Linus Torvalds's avatar
Linus Torvalds committed
81

82
	if (READ_BUS_STATUS(slot_cur->ctrl))
Linus Torvalds's avatar
Linus Torvalds committed
83
		rc = ibmphp_hpc_readslot(slot_cur, READ_BUSSTATUS, NULL);
84 85

	if (rc)
Linus Torvalds's avatar
Linus Torvalds committed
86
		return rc;
87

Linus Torvalds's avatar
Linus Torvalds committed
88 89 90 91 92 93 94 95 96 97 98
	slot_cur->bus_on->current_speed = CURRENT_BUS_SPEED(slot_cur->busstatus);
	if (READ_BUS_MODE(slot_cur->ctrl))
		slot_cur->bus_on->current_bus_mode =
				CURRENT_BUS_MODE(slot_cur->busstatus);
	else
		slot_cur->bus_on->current_bus_mode = 0xFF;

	debug("busstatus = %x, bus_speed = %x, bus_mode = %x\n",
			slot_cur->busstatus,
			slot_cur->bus_on->current_speed,
			slot_cur->bus_on->current_bus_mode);
99

Linus Torvalds's avatar
Linus Torvalds committed
100 101 102 103 104 105 106
	*sl = slot_cur;
	return 0;
}

static inline int slot_update(struct slot **sl)
{
	int rc;
107 108
	rc = ibmphp_hpc_readslot(*sl, READ_ALLSTAT, NULL);
	if (rc)
Linus Torvalds's avatar
Linus Torvalds committed
109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150
		return rc;
	if (!init_flag)
		rc = get_cur_bus_info(sl);
	return rc;
}

static int __init get_max_slots (void)
{
	struct slot * slot_cur;
	struct list_head * tmp;
	u8 slot_count = 0;

	list_for_each(tmp, &ibmphp_slot_head) {
		slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
		/* sometimes the hot-pluggable slots start with 4 (not always from 1) */
		slot_count = max(slot_count, slot_cur->number);
	}
	return slot_count;
}

/* This routine will put the correct slot->device information per slot.  It's
 * called from initialization of the slot structures. It will also assign
 * interrupt numbers per each slot.
 * Parameters: struct slot
 * Returns 0 or errors
 */
int ibmphp_init_devno(struct slot **cur_slot)
{
	struct irq_routing_table *rtable;
	int len;
	int loop;
	int i;

	rtable = pcibios_get_irq_routing_table();
	if (!rtable) {
		err("no BIOS routing table...\n");
		return -ENOMEM;
	}

	len = (rtable->size - sizeof(struct irq_routing_table)) /
			sizeof(struct irq_info);

151 152
	if (!len) {
		kfree(rtable);
Linus Torvalds's avatar
Linus Torvalds committed
153
		return -1;
154
	}
Linus Torvalds's avatar
Linus Torvalds committed
155
	for (loop = 0; loop < len; loop++) {
156 157
		if ((*cur_slot)->number == rtable->slots[loop].slot &&
		    (*cur_slot)->bus == rtable->slots[loop].bus) {
158
			struct io_apic_irq_attr irq_attr;
159

Linus Torvalds's avatar
Linus Torvalds committed
160 161 162
			(*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn);
			for (i = 0; i < 4; i++)
				(*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus,
163
						(int) (*cur_slot)->device, i,
164
						&irq_attr);
165 166 167 168 169 170 171 172 173 174

			debug("(*cur_slot)->irq[0] = %x\n",
					(*cur_slot)->irq[0]);
			debug("(*cur_slot)->irq[1] = %x\n",
					(*cur_slot)->irq[1]);
			debug("(*cur_slot)->irq[2] = %x\n",
					(*cur_slot)->irq[2]);
			debug("(*cur_slot)->irq[3] = %x\n",
					(*cur_slot)->irq[3]);

175
			debug("rtable->exclusive_irqs = %x\n",
Linus Torvalds's avatar
Linus Torvalds committed
176
					rtable->exclusive_irqs);
177
			debug("rtable->slots[loop].irq[0].bitmap = %x\n",
Linus Torvalds's avatar
Linus Torvalds committed
178
					rtable->slots[loop].irq[0].bitmap);
179
			debug("rtable->slots[loop].irq[1].bitmap = %x\n",
Linus Torvalds's avatar
Linus Torvalds committed
180
					rtable->slots[loop].irq[1].bitmap);
181
			debug("rtable->slots[loop].irq[2].bitmap = %x\n",
Linus Torvalds's avatar
Linus Torvalds committed
182
					rtable->slots[loop].irq[2].bitmap);
183
			debug("rtable->slots[loop].irq[3].bitmap = %x\n",
Linus Torvalds's avatar
Linus Torvalds committed
184 185
					rtable->slots[loop].irq[3].bitmap);

186
			debug("rtable->slots[loop].irq[0].link = %x\n",
Linus Torvalds's avatar
Linus Torvalds committed
187
					rtable->slots[loop].irq[0].link);
188
			debug("rtable->slots[loop].irq[1].link = %x\n",
Linus Torvalds's avatar
Linus Torvalds committed
189
					rtable->slots[loop].irq[1].link);
190
			debug("rtable->slots[loop].irq[2].link = %x\n",
Linus Torvalds's avatar
Linus Torvalds committed
191
					rtable->slots[loop].irq[2].link);
192
			debug("rtable->slots[loop].irq[3].link = %x\n",
Linus Torvalds's avatar
Linus Torvalds committed
193
					rtable->slots[loop].irq[3].link);
194 195 196
			debug("end of init_devno\n");
			kfree(rtable);
			return 0;
Linus Torvalds's avatar
Linus Torvalds committed
197 198 199
		}
	}

200
	kfree(rtable);
Linus Torvalds's avatar
Linus Torvalds committed
201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242
	return -1;
}

static inline int power_on(struct slot *slot_cur)
{
	u8 cmd = HPC_SLOT_ON;
	int retval;

	retval = ibmphp_hpc_writeslot(slot_cur, cmd);
	if (retval) {
		err("power on failed\n");
		return retval;
	}
	if (CTLR_RESULT(slot_cur->ctrl->status)) {
		err("command not completed successfully in power_on\n");
		return -EIO;
	}
	msleep(3000);	/* For ServeRAID cards, and some 66 PCI */
	return 0;
}

static inline int power_off(struct slot *slot_cur)
{
	u8 cmd = HPC_SLOT_OFF;
	int retval;

	retval = ibmphp_hpc_writeslot(slot_cur, cmd);
	if (retval) {
		err("power off failed\n");
		return retval;
	}
	if (CTLR_RESULT(slot_cur->ctrl->status)) {
		err("command not completed successfully in power_off\n");
		retval = -EIO;
	}
	return retval;
}

static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
{
	int rc = 0;
	struct slot *pslot;
243
	u8 cmd = 0x00;     /* avoid compiler warning */
Linus Torvalds's avatar
Linus Torvalds committed
244 245 246 247

	debug("set_attention_status - Entry hotplug_slot[%lx] value[%x]\n",
			(ulong) hotplug_slot, value);
	ibmphp_lock_operations();
248

Linus Torvalds's avatar
Linus Torvalds committed
249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273

	if (hotplug_slot) {
		switch (value) {
		case HPC_SLOT_ATTN_OFF:
			cmd = HPC_SLOT_ATTNOFF;
			break;
		case HPC_SLOT_ATTN_ON:
			cmd = HPC_SLOT_ATTNON;
			break;
		case HPC_SLOT_ATTN_BLINK:
			cmd = HPC_SLOT_BLINKLED;
			break;
		default:
			rc = -ENODEV;
			err("set_attention_status - Error : invalid input [%x]\n",
					value);
			break;
		}
		if (rc == 0) {
			pslot = hotplug_slot->private;
			if (pslot)
				rc = ibmphp_hpc_writeslot(pslot, cmd);
			else
				rc = -ENODEV;
		}
274
	} else
Linus Torvalds's avatar
Linus Torvalds committed
275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290
		rc = -ENODEV;

	ibmphp_unlock_operations();

	debug("set_attention_status - Exit rc[%d]\n", rc);
	return rc;
}

static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 * value)
{
	int rc = -ENODEV;
	struct slot *pslot;
	struct slot myslot;

	debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
					(ulong) hotplug_slot, (ulong) value);
291

Linus Torvalds's avatar
Linus Torvalds committed
292
	ibmphp_lock_operations();
293
	if (hotplug_slot) {
Linus Torvalds's avatar
Linus Torvalds committed
294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322
		pslot = hotplug_slot->private;
		if (pslot) {
			memcpy(&myslot, pslot, sizeof(struct slot));
			rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
						&(myslot.status));
			if (!rc)
				rc = ibmphp_hpc_readslot(pslot,
						READ_EXTSLOTSTATUS,
						&(myslot.ext_status));
			if (!rc)
				*value = SLOT_ATTN(myslot.status,
						myslot.ext_status);
		}
	}

	ibmphp_unlock_operations();
	debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value);
	return rc;
}

static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 * value)
{
	int rc = -ENODEV;
	struct slot *pslot;
	struct slot myslot;

	debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
					(ulong) hotplug_slot, (ulong) value);
	ibmphp_lock_operations();
323
	if (hotplug_slot) {
Linus Torvalds's avatar
Linus Torvalds committed
324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349
		pslot = hotplug_slot->private;
		if (pslot) {
			memcpy(&myslot, pslot, sizeof(struct slot));
			rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
						&(myslot.status));
			if (!rc)
				*value = SLOT_LATCH(myslot.status);
		}
	}

	ibmphp_unlock_operations();
	debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n",
			rc, rc, *value);
	return rc;
}


static int get_power_status(struct hotplug_slot *hotplug_slot, u8 * value)
{
	int rc = -ENODEV;
	struct slot *pslot;
	struct slot myslot;

	debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
					(ulong) hotplug_slot, (ulong) value);
	ibmphp_lock_operations();
350
	if (hotplug_slot) {
Linus Torvalds's avatar
Linus Torvalds committed
351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376
		pslot = hotplug_slot->private;
		if (pslot) {
			memcpy(&myslot, pslot, sizeof(struct slot));
			rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
						&(myslot.status));
			if (!rc)
				*value = SLOT_PWRGD(myslot.status);
		}
	}

	ibmphp_unlock_operations();
	debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n",
			rc, rc, *value);
	return rc;
}

static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 * value)
{
	int rc = -ENODEV;
	struct slot *pslot;
	u8 present;
	struct slot myslot;

	debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
					(ulong) hotplug_slot, (ulong) value);
	ibmphp_lock_operations();
377
	if (hotplug_slot) {
Linus Torvalds's avatar
Linus Torvalds committed
378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397
		pslot = hotplug_slot->private;
		if (pslot) {
			memcpy(&myslot, pslot, sizeof(struct slot));
			rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
						&(myslot.status));
			if (!rc) {
				present = SLOT_PRESENT(myslot.status);
				if (present == HPC_SLOT_EMPTY)
					*value = 0;
				else
					*value = 1;
			}
		}
	}

	ibmphp_unlock_operations();
	debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value);
	return rc;
}

398
static int get_max_bus_speed(struct slot *slot)
Linus Torvalds's avatar
Linus Torvalds committed
399
{
400
	int rc;
Linus Torvalds's avatar
Linus Torvalds committed
401
	u8 mode = 0;
402 403
	enum pci_bus_speed speed;
	struct pci_bus *bus = slot->hotplug_slot->pci_slot->bus;
Linus Torvalds's avatar
Linus Torvalds committed
404

405
	debug("%s - Entry slot[%p]\n", __func__, slot);
Linus Torvalds's avatar
Linus Torvalds committed
406 407

	ibmphp_lock_operations();
408
	mode = slot->supported_bus_mode;
409
	speed = slot->supported_speed;
Linus Torvalds's avatar
Linus Torvalds committed
410 411
	ibmphp_unlock_operations();

412 413 414 415
	switch (speed) {
	case BUS_SPEED_33:
		break;
	case BUS_SPEED_66:
416
		if (mode == BUS_MODE_PCIX)
417 418 419 420 421 422 423 424 425
			speed += 0x01;
		break;
	case BUS_SPEED_100:
	case BUS_SPEED_133:
		speed += 0x01;
		break;
	default:
		/* Note (will need to change): there would be soon 256, 512 also */
		rc = -ENODEV;
Linus Torvalds's avatar
Linus Torvalds committed
426 427
	}

428 429 430 431
	if (!rc)
		bus->max_bus_speed = speed;

	debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed);
Linus Torvalds's avatar
Linus Torvalds committed
432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517
	return rc;
}

/*
static int get_max_adapter_speed_1(struct hotplug_slot *hotplug_slot, u8 * value, u8 flag)
{
	int rc = -ENODEV;
	struct slot *pslot;
	struct slot myslot;

	debug("get_max_adapter_speed_1 - Entry hotplug_slot[%lx] pvalue[%lx]\n",
						(ulong)hotplug_slot, (ulong) value);

	if (flag)
		ibmphp_lock_operations();

	if (hotplug_slot && value) {
		pslot = hotplug_slot->private;
		if (pslot) {
			memcpy(&myslot, pslot, sizeof(struct slot));
			rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
						&(myslot.status));

			if (!(SLOT_LATCH (myslot.status)) &&
					(SLOT_PRESENT (myslot.status))) {
				rc = ibmphp_hpc_readslot(pslot,
						READ_EXTSLOTSTATUS,
						&(myslot.ext_status));
				if (!rc)
					*value = SLOT_SPEED(myslot.ext_status);
			} else
				*value = MAX_ADAPTER_NONE;
                }
	}

	if (flag)
		ibmphp_unlock_operations();

	debug("get_max_adapter_speed_1 - Exit rc[%d] value[%x]\n", rc, *value);
	return rc;
}

static int get_bus_name(struct hotplug_slot *hotplug_slot, char * value)
{
	int rc = -ENODEV;
	struct slot *pslot = NULL;

	debug("get_bus_name - Entry hotplug_slot[%lx]\n", (ulong)hotplug_slot);

	ibmphp_lock_operations();

	if (hotplug_slot) {
		pslot = hotplug_slot->private;
		if (pslot) {
			rc = 0;
			snprintf(value, 100, "Bus %x", pslot->bus);
		}
	} else
		rc = -ENODEV;

	ibmphp_unlock_operations();
	debug("get_bus_name - Exit rc[%d] value[%x]\n", rc, *value);
	return rc;
}
*/

/****************************************************************************
 * This routine will initialize the ops data structure used in the validate
 * function. It will also power off empty slots that are powered on since BIOS
 * leaves those on, albeit disconnected
 ****************************************************************************/
static int __init init_ops(void)
{
	struct slot *slot_cur;
	struct list_head *tmp;
	int retval;
	int rc;

	list_for_each(tmp, &ibmphp_slot_head) {
		slot_cur = list_entry(tmp, struct slot, ibm_slot_list);

		if (!slot_cur)
			return -ENODEV;

		debug("BEFORE GETTING SLOT STATUS, slot # %x\n",
							slot_cur->number);
518
		if (slot_cur->ctrl->revision == 0xFF)
Linus Torvalds's avatar
Linus Torvalds committed
519 520 521 522
			if (get_ctrl_revision(slot_cur,
						&slot_cur->ctrl->revision))
				return -1;

523 524
		if (slot_cur->bus_on->current_speed == 0xFF)
			if (get_cur_bus_info(&slot_cur))
Linus Torvalds's avatar
Linus Torvalds committed
525
				return -1;
526
		get_max_bus_speed(slot_cur);
Linus Torvalds's avatar
Linus Torvalds committed
527 528 529 530 531 532 533 534 535 536 537 538 539 540 541

		if (slot_cur->ctrl->options == 0xFF)
			if (get_hpc_options(slot_cur, &slot_cur->ctrl->options))
				return -1;

		retval = slot_update(&slot_cur);
		if (retval)
			return retval;

		debug("status = %x\n", slot_cur->status);
		debug("ext_status = %x\n", slot_cur->ext_status);
		debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status));
		debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status));
		debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status));

542 543
		if ((SLOT_PWRGD(slot_cur->status)) &&
		    !(SLOT_PRESENT(slot_cur->status)) &&
Linus Torvalds's avatar
Linus Torvalds committed
544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583
		    !(SLOT_LATCH(slot_cur->status))) {
			debug("BEFORE POWER OFF COMMAND\n");
				rc = power_off(slot_cur);
				if (rc)
					return rc;

	/*		retval = slot_update(&slot_cur);
	 *		if (retval)
	 *			return retval;
	 *		ibmphp_update_slot_info(slot_cur);
	 */
		}
	}
	init_flag = 0;
	return 0;
}

/* This operation will check whether the slot is within the bounds and
 * the operation is valid to perform on that slot
 * Parameters: slot, operation
 * Returns: 0 or error codes
 */
static int validate(struct slot *slot_cur, int opn)
{
	int number;
	int retval;

	if (!slot_cur)
		return -ENODEV;
	number = slot_cur->number;
	if ((number > max_slots) || (number < 0))
		return -EBADSLT;
	debug("slot_number in validate is %d\n", slot_cur->number);

	retval = slot_update(&slot_cur);
	if (retval)
		return retval;

	switch (opn) {
		case ENABLE:
584 585
			if (!(SLOT_PWRGD(slot_cur->status)) &&
			     (SLOT_PRESENT(slot_cur->status)) &&
Linus Torvalds's avatar
Linus Torvalds committed
586 587 588 589
			     !(SLOT_LATCH(slot_cur->status)))
				return 0;
			break;
		case DISABLE:
590
			if ((SLOT_PWRGD(slot_cur->status)) &&
Linus Torvalds's avatar
Linus Torvalds committed
591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609
			    (SLOT_PRESENT(slot_cur->status)) &&
			    !(SLOT_LATCH(slot_cur->status)))
				return 0;
			break;
		default:
			break;
	}
	err("validate failed....\n");
	return -EINVAL;
}

/****************************************************************************
 * This routine is for updating the data structures in the hotplug core
 * Parameters: struct slot
 * Returns: 0 or error
 ****************************************************************************/
int ibmphp_update_slot_info(struct slot *slot_cur)
{
	struct hotplug_slot_info *info;
610
	struct pci_bus *bus = slot_cur->hotplug_slot->pci_slot->bus;
Linus Torvalds's avatar
Linus Torvalds committed
611 612 613 614 615 616 617 618 619
	int rc;
	u8 bus_speed;
	u8 mode;

	info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
	if (!info) {
		err("out of system memory\n");
		return -ENOMEM;
	}
620

Linus Torvalds's avatar
Linus Torvalds committed
621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640
	info->power_status = SLOT_PWRGD(slot_cur->status);
	info->attention_status = SLOT_ATTN(slot_cur->status,
						slot_cur->ext_status);
	info->latch_status = SLOT_LATCH(slot_cur->status);
        if (!SLOT_PRESENT(slot_cur->status)) {
                info->adapter_status = 0;
/*		info->max_adapter_speed_status = MAX_ADAPTER_NONE; */
	} else {
                info->adapter_status = 1;
/*		get_max_adapter_speed_1(slot_cur->hotplug_slot,
					&info->max_adapter_speed_status, 0); */
	}

	bus_speed = slot_cur->bus_on->current_speed;
	mode = slot_cur->bus_on->current_bus_mode;

	switch (bus_speed) {
		case BUS_SPEED_33:
			break;
		case BUS_SPEED_66:
641
			if (mode == BUS_MODE_PCIX)
Linus Torvalds's avatar
Linus Torvalds committed
642 643 644 645 646 647 648 649 650 651 652 653 654 655
				bus_speed += 0x01;
			else if (mode == BUS_MODE_PCI)
				;
			else
				bus_speed = PCI_SPEED_UNKNOWN;
			break;
		case BUS_SPEED_100:
		case BUS_SPEED_133:
			bus_speed += 0x01;
			break;
		default:
			bus_speed = PCI_SPEED_UNKNOWN;
	}

656
	bus->cur_bus_speed = bus_speed;
657 658
	// To do: bus_names

Linus Torvalds's avatar
Linus Torvalds committed
659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701
	rc = pci_hp_change_slot_info(slot_cur->hotplug_slot, info);
	kfree(info);
	return rc;
}


/******************************************************************************
 * This function will return the pci_func, given bus and devfunc, or NULL.  It
 * is called from visit routines
 ******************************************************************************/

static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
{
	struct pci_func *func_cur;
	struct slot *slot_cur;
	struct list_head * tmp;
	list_for_each(tmp, &ibmphp_slot_head) {
		slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
		if (slot_cur->func) {
			func_cur = slot_cur->func;
			while (func_cur) {
				if ((func_cur->busno == busno) &&
						(func_cur->device == device) &&
						(func_cur->function == function))
					return func_cur;
				func_cur = func_cur->next;
			}
		}
	}
	return NULL;
}

/*************************************************************
 * This routine frees up memory used by struct slot, including
 * the pointers to pci_func, bus, hotplug_slot, controller,
 * and deregistering from the hotplug core
 *************************************************************/
static void free_slots(void)
{
	struct slot *slot_cur;
	struct list_head * tmp;
	struct list_head * next;

702
	debug("%s -- enter\n", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
703 704 705 706 707

	list_for_each_safe(tmp, next, &ibmphp_slot_head) {
		slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
		pci_hp_deregister(slot_cur->hotplug_slot);
	}
708
	debug("%s -- exit\n", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
709 710 711 712 713 714 715
}

static void ibm_unconfigure_device(struct pci_func *func)
{
	struct pci_dev *temp;
	u8 j;

716
	debug("inside %s\n", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
717 718 719 720 721
	debug("func->device = %x, func->function = %x\n",
					func->device, func->function);
	debug("func->device << 3 | 0x0  = %x\n", func->device << 3 | 0x0);

	for (j = 0; j < 0x08; j++) {
722 723
		temp = pci_get_bus_and_slot(func->busno, (func->device << 3) | j);
		if (temp) {
724
			pci_stop_and_remove_bus_device(temp);
725 726
			pci_dev_put(temp);
		}
Linus Torvalds's avatar
Linus Torvalds committed
727
	}
728
	pci_dev_put(func->dev);
Linus Torvalds's avatar
Linus Torvalds committed
729 730 731
}

/*
732 733
 * The following function is to fix kernel bug regarding
 * getting bus entries, here we manually add those primary
Linus Torvalds's avatar
Linus Torvalds committed
734 735 736 737 738 739 740 741 742 743 744 745 746
 * bus entries to kernel bus structure whenever apply
 */
static u8 bus_structure_fixup(u8 busno)
{
	struct pci_bus *bus;
	struct pci_dev *dev;
	u16 l;

	if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno)))
		return 1;

	bus = kmalloc(sizeof(*bus), GFP_KERNEL);
	if (!bus) {
747
		err("%s - out of memory\n", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
748 749 750 751 752
		return 1;
	}
	dev = kmalloc(sizeof(*dev), GFP_KERNEL);
	if (!dev) {
		kfree(bus);
753
		err("%s - out of memory\n", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
754 755 756 757 758 759 760 761 762
		return 1;
	}

	bus->number = busno;
	bus->ops = ibmphp_pci_bus->ops;
	dev->bus = bus;
	for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) {
		if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) &&
					(l != 0x0000) && (l != 0xffff)) {
Masanari Iida's avatar
Masanari Iida committed
763
			debug("%s - Inside bus_structure_fixup()\n",
764
							__func__);
Linus Torvalds's avatar
Linus Torvalds committed
765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785
			pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
			break;
		}
	}

	kfree(dev);
	kfree(bus);

	return 0;
}

static int ibm_configure_device(struct pci_func *func)
{
	struct pci_bus *child;
	int num;
	int flag = 0;	/* this is to make sure we don't double scan the bus,
					for bridged devices primarily */

	if (!(bus_structure_fixup(func->busno)))
		flag = 1;
	if (func->dev == NULL)
786
		func->dev = pci_get_bus_and_slot(func->busno,
Linus Torvalds's avatar
Linus Torvalds committed
787 788 789 790 791 792 793 794 795 796 797 798
				PCI_DEVFN(func->device, func->function));

	if (func->dev == NULL) {
		struct pci_bus *bus = pci_find_bus(0, func->busno);
		if (!bus)
			return 0;

		num = pci_scan_slot(bus,
				PCI_DEVFN(func->device, func->function));
		if (num)
			pci_bus_add_devices(bus);

799
		func->dev = pci_get_bus_and_slot(func->busno,
Linus Torvalds's avatar
Linus Torvalds committed
800 801 802 803 804 805 806
				PCI_DEVFN(func->device, func->function));
		if (func->dev == NULL) {
			err("ERROR... : pci_dev still NULL\n");
			return 0;
		}
	}
	if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
807 808 809 810
		pci_hp_add_bridge(func->dev);
		child = func->dev->subordinate;
		if (child)
			pci_bus_add_devices(child);
Linus Torvalds's avatar
Linus Torvalds committed
811 812 813 814 815 816
	}

	return 0;
}

/*******************************************************
817
 * Returns whether the bus is empty or not
Linus Torvalds's avatar
Linus Torvalds committed
818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844
 *******************************************************/
static int is_bus_empty(struct slot * slot_cur)
{
	int rc;
	struct slot * tmp_slot;
	u8 i = slot_cur->bus_on->slot_min;

	while (i <= slot_cur->bus_on->slot_max) {
		if (i == slot_cur->number) {
			i++;
			continue;
		}
		tmp_slot = ibmphp_get_slot_from_physical_num(i);
		if (!tmp_slot)
			return 0;
		rc = slot_update(&tmp_slot);
		if (rc)
			return 0;
		if (SLOT_PRESENT(tmp_slot->status) &&
					SLOT_PWRGD(tmp_slot->status))
			return 0;
		i++;
	}
	return 1;
}

/***********************************************************
845
 * If the HPC permits and the bus currently empty, tries to set the
Linus Torvalds's avatar
Linus Torvalds committed
846 847 848 849 850 851 852 853 854 855 856 857 858
 * bus speed and mode at the maximum card and bus capability
 * Parameters: slot
 * Returns: bus is set (0) or error code
 ***********************************************************/
static int set_bus(struct slot * slot_cur)
{
	int rc;
	u8 speed;
	u8 cmd = 0x0;
	int retval;
	static struct pci_device_id ciobx[] = {
		{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
	        { },
859
	};
Linus Torvalds's avatar
Linus Torvalds committed
860

861
	debug("%s - entry slot # %d\n", __func__, slot_cur->number);
Linus Torvalds's avatar
Linus Torvalds committed
862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879
	if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
		rc = slot_update(&slot_cur);
		if (rc)
			return rc;
		speed = SLOT_SPEED(slot_cur->ext_status);
		debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
		switch (speed) {
		case HPC_SLOT_SPEED_33:
			cmd = HPC_BUS_33CONVMODE;
			break;
		case HPC_SLOT_SPEED_66:
			if (SLOT_PCIX(slot_cur->ext_status)) {
				if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
						(slot_cur->supported_bus_mode == BUS_MODE_PCIX))
					cmd = HPC_BUS_66PCIXMODE;
				else if (!SLOT_BUS_MODE(slot_cur->ext_status))
					/* if max slot/bus capability is 66 pci
					and there's no bus mode mismatch, then
880
					the adapter supports 66 pci */
Linus Torvalds's avatar
Linus Torvalds committed
881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932
					cmd = HPC_BUS_66CONVMODE;
				else
					cmd = HPC_BUS_33CONVMODE;
			} else {
				if (slot_cur->supported_speed >= BUS_SPEED_66)
					cmd = HPC_BUS_66CONVMODE;
				else
					cmd = HPC_BUS_33CONVMODE;
			}
			break;
		case HPC_SLOT_SPEED_133:
			switch (slot_cur->supported_speed) {
			case BUS_SPEED_33:
				cmd = HPC_BUS_33CONVMODE;
				break;
			case BUS_SPEED_66:
				if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
					cmd = HPC_BUS_66PCIXMODE;
				else
					cmd = HPC_BUS_66CONVMODE;
				break;
			case BUS_SPEED_100:
				cmd = HPC_BUS_100PCIXMODE;
				break;
			case BUS_SPEED_133:
				/* This is to take care of the bug in CIOBX chip */
				if (pci_dev_present(ciobx))
					ibmphp_hpc_writeslot(slot_cur,
							HPC_BUS_100PCIXMODE);
				cmd = HPC_BUS_133PCIXMODE;
				break;
			default:
				err("Wrong bus speed\n");
				return -ENODEV;
			}
			break;
		default:
			err("wrong slot speed\n");
			return -ENODEV;
		}
		debug("setting bus speed for slot %d, cmd %x\n",
						slot_cur->number, cmd);
		retval = ibmphp_hpc_writeslot(slot_cur, cmd);
		if (retval) {
			err("setting bus speed failed\n");
			return retval;
		}
		if (CTLR_RESULT(slot_cur->ctrl->status)) {
			err("command not completed successfully in set_bus\n");
			return -EIO;
		}
	}
933
	/* This is for x440, once Brandon fixes the firmware,
Linus Torvalds's avatar
Linus Torvalds committed
934 935
	will not need this delay */
	msleep(1000);
936
	debug("%s -Exit\n", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
937 938 939 940
	return 0;
}

/* This routine checks the bus limitations that the slot is on from the BIOS.
941
 * This is used in deciding whether or not to power up the slot.
Linus Torvalds's avatar
Linus Torvalds committed
942
 * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
943
 * same bus)
Linus Torvalds's avatar
Linus Torvalds committed
944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988
 * Parameters: slot
 * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
 */
static int check_limitations(struct slot *slot_cur)
{
	u8 i;
	struct slot * tmp_slot;
	u8 count = 0;
	u8 limitation = 0;

	for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
		tmp_slot = ibmphp_get_slot_from_physical_num(i);
		if (!tmp_slot)
			return -ENODEV;
		if ((SLOT_PWRGD(tmp_slot->status)) &&
					!(SLOT_CONNECT(tmp_slot->status)))
			count++;
	}
	get_cur_bus_info(&slot_cur);
	switch (slot_cur->bus_on->current_speed) {
	case BUS_SPEED_33:
		limitation = slot_cur->bus_on->slots_at_33_conv;
		break;
	case BUS_SPEED_66:
		if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
			limitation = slot_cur->bus_on->slots_at_66_pcix;
		else
			limitation = slot_cur->bus_on->slots_at_66_conv;
		break;
	case BUS_SPEED_100:
		limitation = slot_cur->bus_on->slots_at_100_pcix;
		break;
	case BUS_SPEED_133:
		limitation = slot_cur->bus_on->slots_at_133_pcix;
		break;
	}

	if ((count + 1) > limitation)
		return -EINVAL;
	return 0;
}

static inline void print_card_capability(struct slot *slot_cur)
{
	info("capability of the card is ");
989
	if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
Linus Torvalds's avatar
Linus Torvalds committed
990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022
		info("   133 MHz PCI-X\n");
	else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
		info("    66 MHz PCI-X\n");
	else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
		info("    66 MHz PCI\n");
	else
		info("    33 MHz PCI\n");

}

/* This routine will power on the slot, configure the device(s) and find the
 * drivers for them.
 * Parameters: hotplug_slot
 * Returns: 0 or failure codes
 */
static int enable_slot(struct hotplug_slot *hs)
{
	int rc, i, rcpr;
	struct slot *slot_cur;
	u8 function;
	struct pci_func *tmp_func;

	ibmphp_lock_operations();

	debug("ENABLING SLOT........\n");
	slot_cur = hs->private;

	if ((rc = validate(slot_cur, ENABLE))) {
		err("validate function failed\n");
		goto error_nopower;
	}

	attn_LED_blink(slot_cur);
1023

Linus Torvalds's avatar
Linus Torvalds committed
1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039
	rc = set_bus(slot_cur);
	if (rc) {
		err("was not able to set the bus\n");
		goto error_nopower;
	}

	/*-----------------debugging------------------------------*/
	get_cur_bus_info(&slot_cur);
	debug("the current bus speed right after set_bus = %x\n",
					slot_cur->bus_on->current_speed);
	/*----------------------------------------------------------*/

	rc = check_limitations(slot_cur);
	if (rc) {
		err("Adding this card exceeds the limitations of this bus.\n");
		err("(i.e., >1 133MHz cards running on same bus, or "
1040
		     ">2 66 PCI cards running on same bus.\n");
Linus Torvalds's avatar
Linus Torvalds committed
1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084
		err("Try hot-adding into another bus\n");
		rc = -EINVAL;
		goto error_nopower;
	}

	rc = power_on(slot_cur);

	if (rc) {
		err("something wrong when powering up... please see below for details\n");
		/* need to turn off before on, otherwise, blinking overwrites */
		attn_off(slot_cur);
		attn_on(slot_cur);
		if (slot_update(&slot_cur)) {
			attn_off(slot_cur);
			attn_on(slot_cur);
			rc = -ENODEV;
			goto exit;
		}
		/* Check to see the error of why it failed */
		if ((SLOT_POWER(slot_cur->status)) &&
					!(SLOT_PWRGD(slot_cur->status)))
			err("power fault occurred trying to power up\n");
		else if (SLOT_BUS_SPEED(slot_cur->status)) {
			err("bus speed mismatch occurred.  please check "
				"current bus speed and card capability\n");
			print_card_capability(slot_cur);
		} else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
			err("bus mode mismatch occurred.  please check "
				"current bus mode and card capability\n");
			print_card_capability(slot_cur);
		}
		ibmphp_update_slot_info(slot_cur);
		goto exit;
	}
	debug("after power_on\n");
	/*-----------------------debugging---------------------------*/
	get_cur_bus_info(&slot_cur);
	debug("the current bus speed right after power_on = %x\n",
					slot_cur->bus_on->current_speed);
	/*----------------------------------------------------------*/

	rc = slot_update(&slot_cur);
	if (rc)
		goto error_power;
1085

Linus Torvalds's avatar
Linus Torvalds committed
1086 1087 1088 1089 1090 1091 1092 1093 1094 1095
	rc = -EINVAL;
	if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) {
		err("power fault occurred trying to power up...\n");
		goto error_power;
	}
	if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) {
		err("bus speed mismatch occurred.  please check current bus "
					"speed and card capability\n");
		print_card_capability(slot_cur);
		goto error_power;
1096
	}
Linus Torvalds's avatar
Linus Torvalds committed
1097 1098 1099 1100 1101 1102 1103
	/* Don't think this case will happen after above checks...
	 * but just in case, for paranoia sake */
	if (!(SLOT_POWER(slot_cur->status))) {
		err("power on failed...\n");
		goto error_power;
	}

1104
	slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146
	if (!slot_cur->func) {
		/* We cannot do update_slot_info here, since no memory for
		 * kmalloc n.e.ways, and update_slot_info allocates some */
		err("out of system memory\n");
		rc = -ENOMEM;
		goto error_power;
	}
	slot_cur->func->busno = slot_cur->bus;
	slot_cur->func->device = slot_cur->device;
	for (i = 0; i < 4; i++)
		slot_cur->func->irq[i] = slot_cur->irq[i];

	debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
					slot_cur->bus, slot_cur->device);

	if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
		err("configure_card was unsuccessful...\n");
		/* true because don't need to actually deallocate resources,
		 * just remove references */
		ibmphp_unconfigure_card(&slot_cur, 1);
		debug("after unconfigure_card\n");
		slot_cur->func = NULL;
		rc = -ENOMEM;
		goto error_power;
	}

	function = 0x00;
	do {
		tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
							function++);
		if (tmp_func && !(tmp_func->dev))
			ibm_configure_device(tmp_func);
	} while (tmp_func);

	attn_off(slot_cur);
	if (slot_update(&slot_cur)) {
		rc = -EFAULT;
		goto exit;
	}
	ibmphp_print_test();
	rc = ibmphp_update_slot_info(slot_cur);
exit:
1147
	ibmphp_unlock_operations();
Linus Torvalds's avatar
Linus Torvalds committed
1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182
	return rc;

error_nopower:
	attn_off(slot_cur);	/* need to turn off if was blinking b4 */
	attn_on(slot_cur);
error_cont:
	rcpr = slot_update(&slot_cur);
	if (rcpr) {
		rc = rcpr;
		goto exit;
	}
	ibmphp_update_slot_info(slot_cur);
	goto exit;

error_power:
	attn_off(slot_cur);	/* need to turn off if was blinking b4 */
	attn_on(slot_cur);
	rcpr = power_off(slot_cur);
	if (rcpr) {
		rc = rcpr;
		goto exit;
	}
	goto error_cont;
}

/**************************************************************
* HOT REMOVING ADAPTER CARD                                   *
* INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE                *
* OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE         *
          DISABLE POWER ,                                    *
**************************************************************/
static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
{
	struct slot *slot = hotplug_slot->private;
	int rc;
1183

Linus Torvalds's avatar
Linus Torvalds committed
1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194
	ibmphp_lock_operations();
	rc = ibmphp_do_disable_slot(slot);
	ibmphp_unlock_operations();
	return rc;
}

int ibmphp_do_disable_slot(struct slot *slot_cur)
{
	int rc;
	u8 flag;

1195 1196
	debug("DISABLING SLOT...\n");

Linus Torvalds's avatar
Linus Torvalds committed
1197 1198 1199
	if ((slot_cur == NULL) || (slot_cur->ctrl == NULL)) {
		return -ENODEV;
	}
1200

Linus Torvalds's avatar
Linus Torvalds committed
1201
	flag = slot_cur->flag;
1202
	slot_cur->flag = 1;
Linus Torvalds's avatar
Linus Torvalds committed
1203

1204
	if (flag == 1) {
Linus Torvalds's avatar
Linus Torvalds committed
1205 1206 1207 1208 1209 1210 1211 1212
		rc = validate(slot_cur, DISABLE);
			/* checking if powered off already & valid slot # */
		if (rc)
			goto error;
	}
	attn_LED_blink(slot_cur);

	if (slot_cur->func == NULL) {
1213
		/* We need this for functions that were there on bootup */
1214
		slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
1215 1216 1217 1218 1219 1220 1221 1222 1223 1224
		if (!slot_cur->func) {
			err("out of system memory\n");
			rc = -ENOMEM;
			goto error;
		}
		slot_cur->func->busno = slot_cur->bus;
		slot_cur->func->device = slot_cur->device;
	}

	ibm_unconfigure_device(slot_cur->func);
1225 1226 1227 1228 1229 1230 1231

	/*
	 * If we got here from latch suddenly opening on operating card or
	 * a power fault, there's no power to the card, so cannot
	 * read from it to determine what resources it occupied.  This operation
	 * is forbidden anyhow.  The best we can do is remove it from kernel
	 * lists at least */
Linus Torvalds's avatar
Linus Torvalds committed
1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267

	if (!flag) {
		attn_off(slot_cur);
		return 0;
	}

	rc = ibmphp_unconfigure_card(&slot_cur, 0);
	slot_cur->func = NULL;
	debug("in disable_slot. after unconfigure_card\n");
	if (rc) {
		err("could not unconfigure card.\n");
		goto error;
	}

	rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
	if (rc)
		goto error;

	attn_off(slot_cur);
	rc = slot_update(&slot_cur);
	if (rc)
		goto exit;

	rc = ibmphp_update_slot_info(slot_cur);
	ibmphp_print_test();
exit:
	return rc;

error:
	/*  Need to turn off if was blinking b4 */
	attn_off(slot_cur);
	attn_on(slot_cur);
	if (slot_update(&slot_cur)) {
		rc = -EFAULT;
		goto exit;
	}
1268
	if (flag)
Linus Torvalds's avatar
Linus Torvalds committed
1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342
		ibmphp_update_slot_info(slot_cur);
	goto exit;
}

struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
	.set_attention_status =		set_attention_status,
	.enable_slot =			enable_slot,
	.disable_slot =			ibmphp_disable_slot,
	.hardware_test =		NULL,
	.get_power_status =		get_power_status,
	.get_attention_status =		get_attention_status,
	.get_latch_status =		get_latch_status,
	.get_adapter_status =		get_adapter_present,
/*	.get_max_adapter_speed =	get_max_adapter_speed,
	.get_bus_name_status =		get_bus_name,
*/
};

static void ibmphp_unload(void)
{
	free_slots();
	debug("after slots\n");
	ibmphp_free_resources();
	debug("after resources\n");
	ibmphp_free_bus_info_queue();
	debug("after bus info\n");
	ibmphp_free_ebda_hpc_queue();
	debug("after ebda hpc\n");
	ibmphp_free_ebda_pci_rsrc_queue();
	debug("after ebda pci rsrc\n");
	kfree(ibmphp_pci_bus);
}

static int __init ibmphp_init(void)
{
	struct pci_bus *bus;
	int i = 0;
	int rc = 0;

	init_flag = 1;

	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");

	ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
	if (!ibmphp_pci_bus) {
		err("out of memory\n");
		rc = -ENOMEM;
		goto exit;
	}

	bus = pci_find_bus(0, 0);
	if (!bus) {
		err("Can't find the root pci bus, can not continue\n");
		rc = -ENODEV;
		goto error;
	}
	memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));

	ibmphp_debug = debug;

	ibmphp_hpc_initvars();

	for (i = 0; i < 16; i++)
		irqs[i] = 0;

	if ((rc = ibmphp_access_ebda()))
		goto error;
	debug("after ibmphp_access_ebda()\n");

	if ((rc = ibmphp_rsrc_init()))
		goto error;
	debug("AFTER Resource & EBDA INITIALIZATIONS\n");

	max_slots = get_max_slots();
1343

Linus Torvalds's avatar
Linus Torvalds committed
1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373
	if ((rc = ibmphp_register_pci()))
		goto error;

	if (init_ops()) {
		rc = -ENODEV;
		goto error;
	}

	ibmphp_print_test();
	if ((rc = ibmphp_hpc_start_poll_thread())) {
		goto error;
	}

exit:
	return rc;

error:
	ibmphp_unload();
	goto exit;
}

static void __exit ibmphp_exit(void)
{
	ibmphp_hpc_stop_poll_thread();
	debug("after polling\n");
	ibmphp_unload();
	debug("done\n");
}

module_init(ibmphp_init);
1374
module_exit(ibmphp_exit);