src.c revision 101ae14edc14efb0fe6ed8a77ed370cca670ffc8
1/* 2 * Adaptec AAC series RAID controller driver 3 * (c) Copyright 2001 Red Hat Inc. 4 * 5 * based on the old aacraid driver that is.. 6 * Adaptec aacraid device driver for Linux. 7 * 8 * Copyright (c) 2000-2010 Adaptec, Inc. 9 * 2010 PMC-Sierra, Inc. (aacraid@pmc-sierra.com) 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2, or (at your option) 14 * any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; see the file COPYING. If not, write to 23 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 24 * 25 * Module Name: 26 * src.c 27 * 28 * Abstract: Hardware Device Interface for PMC SRC based controllers 29 * 30 */ 31 32#include <linux/kernel.h> 33#include <linux/init.h> 34#include <linux/types.h> 35#include <linux/pci.h> 36#include <linux/spinlock.h> 37#include <linux/slab.h> 38#include <linux/blkdev.h> 39#include <linux/delay.h> 40#include <linux/completion.h> 41#include <linux/time.h> 42#include <linux/interrupt.h> 43#include <scsi/scsi_host.h> 44 45#include "aacraid.h" 46 47static irqreturn_t aac_src_intr_message(int irq, void *dev_id) 48{ 49 struct aac_dev *dev = dev_id; 50 unsigned long bellbits, bellbits_shifted; 51 int our_interrupt = 0; 52 int isFastResponse; 53 u32 index, handle; 54 55 bellbits = src_readl(dev, MUnit.ODR_R); 56 if (bellbits & PmDoorBellResponseSent) { 57 bellbits = PmDoorBellResponseSent; 58 /* handle async. status */ 59 our_interrupt = 1; 60 index = dev->host_rrq_idx; 61 if (dev->host_rrq[index] == 0) { 62 u32 old_index = index; 63 /* adjust index */ 64 do { 65 index++; 66 if (index == dev->scsi_host_ptr->can_queue + 67 AAC_NUM_MGT_FIB) 68 index = 0; 69 if (dev->host_rrq[index] != 0) 70 break; 71 } while (index != old_index); 72 dev->host_rrq_idx = index; 73 } 74 for (;;) { 75 isFastResponse = 0; 76 /* remove toggle bit (31) */ 77 handle = (dev->host_rrq[index] & 0x7fffffff); 78 /* check fast response bit (30) */ 79 if (handle & 0x40000000) 80 isFastResponse = 1; 81 handle &= 0x0000ffff; 82 if (handle == 0) 83 break; 84 85 aac_intr_normal(dev, handle-1, 0, isFastResponse, NULL); 86 87 dev->host_rrq[index++] = 0; 88 if (index == dev->scsi_host_ptr->can_queue + 89 AAC_NUM_MGT_FIB) 90 index = 0; 91 dev->host_rrq_idx = index; 92 } 93 } else { 94 bellbits_shifted = (bellbits >> SRC_ODR_SHIFT); 95 if (bellbits_shifted & DoorBellAifPending) { 96 our_interrupt = 1; 97 /* handle AIF */ 98 aac_intr_normal(dev, 0, 2, 0, NULL); 99 } 100 } 101 102 if (our_interrupt) { 103 src_writel(dev, MUnit.ODR_C, bellbits); 104 return IRQ_HANDLED; 105 } 106 return IRQ_NONE; 107} 108 109/** 110 * aac_src_disable_interrupt - Disable interrupts 111 * @dev: Adapter 112 */ 113 114static void aac_src_disable_interrupt(struct aac_dev *dev) 115{ 116 src_writel(dev, MUnit.OIMR, dev->OIMR = 0xffffffff); 117} 118 119/** 120 * aac_src_enable_interrupt_message - Enable interrupts 121 * @dev: Adapter 122 */ 123 124static void aac_src_enable_interrupt_message(struct aac_dev *dev) 125{ 126 src_writel(dev, MUnit.OIMR, dev->OIMR = 0xfffffff8); 127} 128 129/** 130 * src_sync_cmd - send a command and wait 131 * @dev: Adapter 132 * @command: Command to execute 133 * @p1: first parameter 134 * @ret: adapter status 135 * 136 * This routine will send a synchronous command to the adapter and wait 137 * for its completion. 138 */ 139 140static int src_sync_cmd(struct aac_dev *dev, u32 command, 141 u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6, 142 u32 *status, u32 * r1, u32 * r2, u32 * r3, u32 * r4) 143{ 144 unsigned long start; 145 int ok; 146 147 /* 148 * Write the command into Mailbox 0 149 */ 150 writel(command, &dev->IndexRegs->Mailbox[0]); 151 /* 152 * Write the parameters into Mailboxes 1 - 6 153 */ 154 writel(p1, &dev->IndexRegs->Mailbox[1]); 155 writel(p2, &dev->IndexRegs->Mailbox[2]); 156 writel(p3, &dev->IndexRegs->Mailbox[3]); 157 writel(p4, &dev->IndexRegs->Mailbox[4]); 158 159 /* 160 * Clear the synch command doorbell to start on a clean slate. 161 */ 162 src_writel(dev, MUnit.ODR_C, OUTBOUNDDOORBELL_0 << SRC_ODR_SHIFT); 163 164 /* 165 * Disable doorbell interrupts 166 */ 167 src_writel(dev, MUnit.OIMR, dev->OIMR = 0xffffffff); 168 169 /* 170 * Force the completion of the mask register write before issuing 171 * the interrupt. 172 */ 173 src_readl(dev, MUnit.OIMR); 174 175 /* 176 * Signal that there is a new synch command 177 */ 178 src_writel(dev, MUnit.IDR, INBOUNDDOORBELL_0 << SRC_IDR_SHIFT); 179 180 ok = 0; 181 start = jiffies; 182 183 /* 184 * Wait up to 30 seconds 185 */ 186 while (time_before(jiffies, start+30*HZ)) { 187 /* Delay 5 microseconds to let Mon960 get info. */ 188 udelay(5); 189 190 /* Mon960 will set doorbell0 bit 191 * when it has completed the command 192 */ 193 if ((src_readl(dev, MUnit.ODR_R) >> SRC_ODR_SHIFT) & OUTBOUNDDOORBELL_0) { 194 /* Clear the doorbell */ 195 src_writel(dev, 196 MUnit.ODR_C, 197 OUTBOUNDDOORBELL_0 << SRC_ODR_SHIFT); 198 ok = 1; 199 break; 200 } 201 202 /* Yield the processor in case we are slow */ 203 msleep(1); 204 } 205 if (unlikely(ok != 1)) { 206 /* Restore interrupt mask even though we timed out */ 207 aac_adapter_enable_int(dev); 208 return -ETIMEDOUT; 209 } 210 211 /* Pull the synch status from Mailbox 0 */ 212 if (status) 213 *status = readl(&dev->IndexRegs->Mailbox[0]); 214 if (r1) 215 *r1 = readl(&dev->IndexRegs->Mailbox[1]); 216 if (r2) 217 *r2 = readl(&dev->IndexRegs->Mailbox[2]); 218 if (r3) 219 *r3 = readl(&dev->IndexRegs->Mailbox[3]); 220 if (r4) 221 *r4 = readl(&dev->IndexRegs->Mailbox[4]); 222 223 /* Clear the synch command doorbell */ 224 src_writel(dev, MUnit.ODR_C, OUTBOUNDDOORBELL_0 << SRC_ODR_SHIFT); 225 226 /* Restore interrupt mask */ 227 aac_adapter_enable_int(dev); 228 return 0; 229 230} 231 232/** 233 * aac_src_interrupt_adapter - interrupt adapter 234 * @dev: Adapter 235 * 236 * Send an interrupt to the i960 and breakpoint it. 237 */ 238 239static void aac_src_interrupt_adapter(struct aac_dev *dev) 240{ 241 src_sync_cmd(dev, BREAKPOINT_REQUEST, 242 0, 0, 0, 0, 0, 0, 243 NULL, NULL, NULL, NULL, NULL); 244} 245 246/** 247 * aac_src_notify_adapter - send an event to the adapter 248 * @dev: Adapter 249 * @event: Event to send 250 * 251 * Notify the i960 that something it probably cares about has 252 * happened. 253 */ 254 255static void aac_src_notify_adapter(struct aac_dev *dev, u32 event) 256{ 257 switch (event) { 258 259 case AdapNormCmdQue: 260 src_writel(dev, MUnit.ODR_C, 261 INBOUNDDOORBELL_1 << SRC_ODR_SHIFT); 262 break; 263 case HostNormRespNotFull: 264 src_writel(dev, MUnit.ODR_C, 265 INBOUNDDOORBELL_4 << SRC_ODR_SHIFT); 266 break; 267 case AdapNormRespQue: 268 src_writel(dev, MUnit.ODR_C, 269 INBOUNDDOORBELL_2 << SRC_ODR_SHIFT); 270 break; 271 case HostNormCmdNotFull: 272 src_writel(dev, MUnit.ODR_C, 273 INBOUNDDOORBELL_3 << SRC_ODR_SHIFT); 274 break; 275 case FastIo: 276 src_writel(dev, MUnit.ODR_C, 277 INBOUNDDOORBELL_6 << SRC_ODR_SHIFT); 278 break; 279 case AdapPrintfDone: 280 src_writel(dev, MUnit.ODR_C, 281 INBOUNDDOORBELL_5 << SRC_ODR_SHIFT); 282 break; 283 default: 284 BUG(); 285 break; 286 } 287} 288 289/** 290 * aac_src_start_adapter - activate adapter 291 * @dev: Adapter 292 * 293 * Start up processing on an i960 based AAC adapter 294 */ 295 296static void aac_src_start_adapter(struct aac_dev *dev) 297{ 298 struct aac_init *init; 299 300 init = dev->init; 301 init->HostElapsedSeconds = cpu_to_le32(get_seconds()); 302 303 /* We can only use a 32 bit address here */ 304 src_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, 305 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL); 306} 307 308/** 309 * aac_src_check_health 310 * @dev: device to check if healthy 311 * 312 * Will attempt to determine if the specified adapter is alive and 313 * capable of handling requests, returning 0 if alive. 314 */ 315static int aac_src_check_health(struct aac_dev *dev) 316{ 317 u32 status = src_readl(dev, MUnit.OMR); 318 319 /* 320 * Check to see if the board failed any self tests. 321 */ 322 if (unlikely(status & SELF_TEST_FAILED)) 323 return -1; 324 325 /* 326 * Check to see if the board panic'd. 327 */ 328 if (unlikely(status & KERNEL_PANIC)) 329 return (status >> 16) & 0xFF; 330 /* 331 * Wait for the adapter to be up and running. 332 */ 333 if (unlikely(!(status & KERNEL_UP_AND_RUNNING))) 334 return -3; 335 /* 336 * Everything is OK 337 */ 338 return 0; 339} 340 341/** 342 * aac_src_deliver_message 343 * @fib: fib to issue 344 * 345 * Will send a fib, returning 0 if successful. 346 */ 347static int aac_src_deliver_message(struct fib *fib) 348{ 349 struct aac_dev *dev = fib->dev; 350 struct aac_queue *q = &dev->queues->queue[AdapNormCmdQueue]; 351 unsigned long qflags; 352 u32 fibsize; 353 u64 address; 354 struct aac_fib_xporthdr *pFibX; 355 356 spin_lock_irqsave(q->lock, qflags); 357 q->numpending++; 358 spin_unlock_irqrestore(q->lock, qflags); 359 360 /* Calculate the amount to the fibsize bits */ 361 fibsize = (sizeof(struct aac_fib_xporthdr) + 362 fib->hw_fib_va->header.Size + 127) / 128 - 1; 363 if (fibsize > (ALIGN32 - 1)) 364 fibsize = ALIGN32 - 1; 365 366 /* Fill XPORT header */ 367 pFibX = (struct aac_fib_xporthdr *) 368 ((unsigned char *)fib->hw_fib_va - 369 sizeof(struct aac_fib_xporthdr)); 370 pFibX->Handle = fib->hw_fib_va->header.SenderData + 1; 371 pFibX->HostAddress = fib->hw_fib_pa; 372 pFibX->Size = fib->hw_fib_va->header.Size; 373 address = fib->hw_fib_pa - (u64)sizeof(struct aac_fib_xporthdr); 374 375 src_writel(dev, MUnit.IQ_H, (u32)(address >> 32)); 376 src_writel(dev, MUnit.IQ_L, (u32)(address & 0xffffffff) + fibsize); 377 return 0; 378} 379 380/** 381 * aac_src_ioremap 382 * @size: mapping resize request 383 * 384 */ 385static int aac_src_ioremap(struct aac_dev *dev, u32 size) 386{ 387 if (!size) { 388 iounmap(dev->regs.src.bar0); 389 dev->regs.src.bar0 = NULL; 390 iounmap(dev->base); 391 dev->base = NULL; 392 return 0; 393 } 394 dev->regs.src.bar1 = ioremap(pci_resource_start(dev->pdev, 2), 395 AAC_MIN_SRC_BAR1_SIZE); 396 dev->base = NULL; 397 if (dev->regs.src.bar1 == NULL) 398 return -1; 399 dev->base = dev->regs.src.bar0 = ioremap(dev->scsi_host_ptr->base, 400 size); 401 if (dev->base == NULL) { 402 iounmap(dev->regs.src.bar1); 403 dev->regs.src.bar1 = NULL; 404 return -1; 405 } 406 dev->IndexRegs = &((struct src_registers __iomem *) 407 dev->base)->IndexRegs; 408 return 0; 409} 410 411static int aac_src_restart_adapter(struct aac_dev *dev, int bled) 412{ 413 u32 var, reset_mask; 414 415 if (bled >= 0) { 416 if (bled) 417 printk(KERN_ERR "%s%d: adapter kernel panic'd %x.\n", 418 dev->name, dev->id, bled); 419 bled = aac_adapter_sync_cmd(dev, IOP_RESET_ALWAYS, 420 0, 0, 0, 0, 0, 0, &var, &reset_mask, NULL, NULL, NULL); 421 if (bled || (var != 0x00000001)) 422 bled = -EINVAL; 423 if (dev->supplement_adapter_info.SupportedOptions2 & 424 AAC_OPTION_DOORBELL_RESET) { 425 src_writel(dev, MUnit.IDR, reset_mask); 426 msleep(5000); /* Delay 5 seconds */ 427 } 428 } 429 430 if (src_readl(dev, MUnit.OMR) & KERNEL_PANIC) 431 return -ENODEV; 432 433 if (startup_timeout < 300) 434 startup_timeout = 300; 435 436 return 0; 437} 438 439/** 440 * aac_src_select_comm - Select communications method 441 * @dev: Adapter 442 * @comm: communications method 443 */ 444int aac_src_select_comm(struct aac_dev *dev, int comm) 445{ 446 switch (comm) { 447 case AAC_COMM_MESSAGE: 448 dev->a_ops.adapter_enable_int = aac_src_enable_interrupt_message; 449 dev->a_ops.adapter_intr = aac_src_intr_message; 450 dev->a_ops.adapter_deliver = aac_src_deliver_message; 451 break; 452 default: 453 return 1; 454 } 455 return 0; 456} 457 458/** 459 * aac_src_init - initialize an Cardinal Frey Bar card 460 * @dev: device to configure 461 * 462 */ 463 464int aac_src_init(struct aac_dev *dev) 465{ 466 unsigned long start; 467 unsigned long status; 468 int restart = 0; 469 int instance = dev->id; 470 const char *name = dev->name; 471 472 dev->a_ops.adapter_ioremap = aac_src_ioremap; 473 dev->a_ops.adapter_comm = aac_src_select_comm; 474 475 dev->base_size = AAC_MIN_SRC_BAR0_SIZE; 476 if (aac_adapter_ioremap(dev, dev->base_size)) { 477 printk(KERN_WARNING "%s: unable to map adapter.\n", name); 478 goto error_iounmap; 479 } 480 481 /* Failure to reset here is an option ... */ 482 dev->a_ops.adapter_sync_cmd = src_sync_cmd; 483 dev->a_ops.adapter_enable_int = aac_src_disable_interrupt; 484 if ((aac_reset_devices || reset_devices) && 485 !aac_src_restart_adapter(dev, 0)) 486 ++restart; 487 /* 488 * Check to see if the board panic'd while booting. 489 */ 490 status = src_readl(dev, MUnit.OMR); 491 if (status & KERNEL_PANIC) { 492 if (aac_src_restart_adapter(dev, aac_src_check_health(dev))) 493 goto error_iounmap; 494 ++restart; 495 } 496 /* 497 * Check to see if the board failed any self tests. 498 */ 499 status = src_readl(dev, MUnit.OMR); 500 if (status & SELF_TEST_FAILED) { 501 printk(KERN_ERR "%s%d: adapter self-test failed.\n", 502 dev->name, instance); 503 goto error_iounmap; 504 } 505 /* 506 * Check to see if the monitor panic'd while booting. 507 */ 508 if (status & MONITOR_PANIC) { 509 printk(KERN_ERR "%s%d: adapter monitor panic.\n", 510 dev->name, instance); 511 goto error_iounmap; 512 } 513 start = jiffies; 514 /* 515 * Wait for the adapter to be up and running. Wait up to 3 minutes 516 */ 517 while (!((status = src_readl(dev, MUnit.OMR)) & 518 KERNEL_UP_AND_RUNNING)) { 519 if ((restart && 520 (status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC))) || 521 time_after(jiffies, start+HZ*startup_timeout)) { 522 printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n", 523 dev->name, instance, status); 524 goto error_iounmap; 525 } 526 if (!restart && 527 ((status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC)) || 528 time_after(jiffies, start + HZ * 529 ((startup_timeout > 60) 530 ? (startup_timeout - 60) 531 : (startup_timeout / 2))))) { 532 if (likely(!aac_src_restart_adapter(dev, 533 aac_src_check_health(dev)))) 534 start = jiffies; 535 ++restart; 536 } 537 msleep(1); 538 } 539 if (restart && aac_commit) 540 aac_commit = 1; 541 /* 542 * Fill in the common function dispatch table. 543 */ 544 dev->a_ops.adapter_interrupt = aac_src_interrupt_adapter; 545 dev->a_ops.adapter_disable_int = aac_src_disable_interrupt; 546 dev->a_ops.adapter_notify = aac_src_notify_adapter; 547 dev->a_ops.adapter_sync_cmd = src_sync_cmd; 548 dev->a_ops.adapter_check_health = aac_src_check_health; 549 dev->a_ops.adapter_restart = aac_src_restart_adapter; 550 551 /* 552 * First clear out all interrupts. Then enable the one's that we 553 * can handle. 554 */ 555 aac_adapter_comm(dev, AAC_COMM_MESSAGE); 556 aac_adapter_disable_int(dev); 557 src_writel(dev, MUnit.ODR_C, 0xffffffff); 558 aac_adapter_enable_int(dev); 559 560 if (aac_init_adapter(dev) == NULL) 561 goto error_iounmap; 562 if (dev->comm_interface != AAC_COMM_MESSAGE_TYPE1) 563 goto error_iounmap; 564 565 dev->msi = aac_msi && !pci_enable_msi(dev->pdev); 566 567 if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr, 568 IRQF_SHARED|IRQF_DISABLED, "aacraid", dev) < 0) { 569 570 if (dev->msi) 571 pci_disable_msi(dev->pdev); 572 573 printk(KERN_ERR "%s%d: Interrupt unavailable.\n", 574 name, instance); 575 goto error_iounmap; 576 } 577 dev->dbg_base = pci_resource_start(dev->pdev, 2); 578 dev->dbg_base_mapped = dev->regs.src.bar1; 579 dev->dbg_size = AAC_MIN_SRC_BAR1_SIZE; 580 581 aac_adapter_enable_int(dev); 582 /* 583 * Tell the adapter that all is configured, and it can 584 * start accepting requests 585 */ 586 aac_src_start_adapter(dev); 587 588 return 0; 589 590error_iounmap: 591 592 return -1; 593} 594