rx.c revision a3940da5e6fe8b833eecdbca3fac9456b4204d6e
1/* 2 * Adaptec AAC series RAID controller driver 3 * (c) Copyright 2001 Red Hat Inc. <alan@redhat.com> 4 * 5 * based on the old aacraid driver that is.. 6 * Adaptec aacraid device driver for Linux. 7 * 8 * Copyright (c) 2000-2007 Adaptec, Inc. (aacraid@adaptec.com) 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2, or (at your option) 13 * any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; see the file COPYING. If not, write to 22 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 23 * 24 * Module Name: 25 * rx.c 26 * 27 * Abstract: Hardware miniport for Drawbridge specific hardware functions. 28 * 29 */ 30 31#include <linux/kernel.h> 32#include <linux/init.h> 33#include <linux/types.h> 34#include <linux/pci.h> 35#include <linux/spinlock.h> 36#include <linux/slab.h> 37#include <linux/blkdev.h> 38#include <linux/delay.h> 39#include <linux/completion.h> 40#include <linux/time.h> 41#include <linux/interrupt.h> 42#include <asm/semaphore.h> 43 44#include <scsi/scsi_host.h> 45 46#include "aacraid.h" 47 48static irqreturn_t aac_rx_intr_producer(int irq, void *dev_id) 49{ 50 struct aac_dev *dev = dev_id; 51 unsigned long bellbits; 52 u8 intstat = rx_readb(dev, MUnit.OISR); 53 54 /* 55 * Read mask and invert because drawbridge is reversed. 56 * This allows us to only service interrupts that have 57 * been enabled. 58 * Check to see if this is our interrupt. If it isn't just return 59 */ 60 if (likely(intstat & ~(dev->OIMR))) { 61 bellbits = rx_readl(dev, OutboundDoorbellReg); 62 if (unlikely(bellbits & DoorBellPrintfReady)) { 63 aac_printf(dev, readl (&dev->IndexRegs->Mailbox[5])); 64 rx_writel(dev, MUnit.ODR,DoorBellPrintfReady); 65 rx_writel(dev, InboundDoorbellReg,DoorBellPrintfDone); 66 } 67 else if (unlikely(bellbits & DoorBellAdapterNormCmdReady)) { 68 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady); 69 aac_command_normal(&dev->queues->queue[HostNormCmdQueue]); 70 } 71 else if (likely(bellbits & DoorBellAdapterNormRespReady)) { 72 rx_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady); 73 aac_response_normal(&dev->queues->queue[HostNormRespQueue]); 74 } 75 else if (unlikely(bellbits & DoorBellAdapterNormCmdNotFull)) { 76 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull); 77 } 78 else if (unlikely(bellbits & DoorBellAdapterNormRespNotFull)) { 79 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull); 80 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull); 81 } 82 return IRQ_HANDLED; 83 } 84 return IRQ_NONE; 85} 86 87static irqreturn_t aac_rx_intr_message(int irq, void *dev_id) 88{ 89 struct aac_dev *dev = dev_id; 90 u32 Index = rx_readl(dev, MUnit.OutboundQueue); 91 if (unlikely(Index == 0xFFFFFFFFL)) 92 Index = rx_readl(dev, MUnit.OutboundQueue); 93 if (likely(Index != 0xFFFFFFFFL)) { 94 do { 95 if (unlikely(aac_intr_normal(dev, Index))) { 96 rx_writel(dev, MUnit.OutboundQueue, Index); 97 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespReady); 98 } 99 Index = rx_readl(dev, MUnit.OutboundQueue); 100 } while (Index != 0xFFFFFFFFL); 101 return IRQ_HANDLED; 102 } 103 return IRQ_NONE; 104} 105 106/** 107 * aac_rx_disable_interrupt - Disable interrupts 108 * @dev: Adapter 109 */ 110 111static void aac_rx_disable_interrupt(struct aac_dev *dev) 112{ 113 rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff); 114} 115 116/** 117 * aac_rx_enable_interrupt_producer - Enable interrupts 118 * @dev: Adapter 119 */ 120 121static void aac_rx_enable_interrupt_producer(struct aac_dev *dev) 122{ 123 rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb); 124} 125 126/** 127 * aac_rx_enable_interrupt_message - Enable interrupts 128 * @dev: Adapter 129 */ 130 131static void aac_rx_enable_interrupt_message(struct aac_dev *dev) 132{ 133 rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7); 134} 135 136/** 137 * rx_sync_cmd - send a command and wait 138 * @dev: Adapter 139 * @command: Command to execute 140 * @p1: first parameter 141 * @ret: adapter status 142 * 143 * This routine will send a synchronous command to the adapter and wait 144 * for its completion. 145 */ 146 147static int rx_sync_cmd(struct aac_dev *dev, u32 command, 148 u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6, 149 u32 *status, u32 * r1, u32 * r2, u32 * r3, u32 * r4) 150{ 151 unsigned long start; 152 int ok; 153 /* 154 * Write the command into Mailbox 0 155 */ 156 writel(command, &dev->IndexRegs->Mailbox[0]); 157 /* 158 * Write the parameters into Mailboxes 1 - 6 159 */ 160 writel(p1, &dev->IndexRegs->Mailbox[1]); 161 writel(p2, &dev->IndexRegs->Mailbox[2]); 162 writel(p3, &dev->IndexRegs->Mailbox[3]); 163 writel(p4, &dev->IndexRegs->Mailbox[4]); 164 /* 165 * Clear the synch command doorbell to start on a clean slate. 166 */ 167 rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0); 168 /* 169 * Disable doorbell interrupts 170 */ 171 rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff); 172 /* 173 * Force the completion of the mask register write before issuing 174 * the interrupt. 175 */ 176 rx_readb (dev, MUnit.OIMR); 177 /* 178 * Signal that there is a new synch command 179 */ 180 rx_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0); 181 182 ok = 0; 183 start = jiffies; 184 185 /* 186 * Wait up to 30 seconds 187 */ 188 while (time_before(jiffies, start+30*HZ)) 189 { 190 udelay(5); /* Delay 5 microseconds to let Mon960 get info. */ 191 /* 192 * Mon960 will set doorbell0 bit when it has completed the command. 193 */ 194 if (rx_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) { 195 /* 196 * Clear the doorbell. 197 */ 198 rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0); 199 ok = 1; 200 break; 201 } 202 /* 203 * Yield the processor in case we are slow 204 */ 205 msleep(1); 206 } 207 if (unlikely(ok != 1)) { 208 /* 209 * Restore interrupt mask even though we timed out 210 */ 211 aac_adapter_enable_int(dev); 212 return -ETIMEDOUT; 213 } 214 /* 215 * Pull the synch status from Mailbox 0. 216 */ 217 if (status) 218 *status = readl(&dev->IndexRegs->Mailbox[0]); 219 if (r1) 220 *r1 = readl(&dev->IndexRegs->Mailbox[1]); 221 if (r2) 222 *r2 = readl(&dev->IndexRegs->Mailbox[2]); 223 if (r3) 224 *r3 = readl(&dev->IndexRegs->Mailbox[3]); 225 if (r4) 226 *r4 = readl(&dev->IndexRegs->Mailbox[4]); 227 /* 228 * Clear the synch command doorbell. 229 */ 230 rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0); 231 /* 232 * Restore interrupt mask 233 */ 234 aac_adapter_enable_int(dev); 235 return 0; 236 237} 238 239/** 240 * aac_rx_interrupt_adapter - interrupt adapter 241 * @dev: Adapter 242 * 243 * Send an interrupt to the i960 and breakpoint it. 244 */ 245 246static void aac_rx_interrupt_adapter(struct aac_dev *dev) 247{ 248 rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL); 249} 250 251/** 252 * aac_rx_notify_adapter - send an event to the adapter 253 * @dev: Adapter 254 * @event: Event to send 255 * 256 * Notify the i960 that something it probably cares about has 257 * happened. 258 */ 259 260static void aac_rx_notify_adapter(struct aac_dev *dev, u32 event) 261{ 262 switch (event) { 263 264 case AdapNormCmdQue: 265 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1); 266 break; 267 case HostNormRespNotFull: 268 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4); 269 break; 270 case AdapNormRespQue: 271 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2); 272 break; 273 case HostNormCmdNotFull: 274 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3); 275 break; 276 case HostShutdown: 277 break; 278 case FastIo: 279 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6); 280 break; 281 case AdapPrintfDone: 282 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5); 283 break; 284 default: 285 BUG(); 286 break; 287 } 288} 289 290/** 291 * aac_rx_start_adapter - activate adapter 292 * @dev: Adapter 293 * 294 * Start up processing on an i960 based AAC adapter 295 */ 296 297static void aac_rx_start_adapter(struct aac_dev *dev) 298{ 299 struct aac_init *init; 300 301 init = dev->init; 302 init->HostElapsedSeconds = cpu_to_le32(get_seconds()); 303 // We can only use a 32 bit address here 304 rx_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_rx_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_rx_check_health(struct aac_dev *dev) 316{ 317 u32 status = rx_readl(dev, MUnit.OMRx[0]); 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 * Check to see if the board panic'd. 326 */ 327 if (unlikely(status & KERNEL_PANIC)) { 328 char * buffer; 329 struct POSTSTATUS { 330 __le32 Post_Command; 331 __le32 Post_Address; 332 } * post; 333 dma_addr_t paddr, baddr; 334 int ret; 335 336 if (likely((status & 0xFF000000L) == 0xBC000000L)) 337 return (status >> 16) & 0xFF; 338 buffer = pci_alloc_consistent(dev->pdev, 512, &baddr); 339 ret = -2; 340 if (unlikely(buffer == NULL)) 341 return ret; 342 post = pci_alloc_consistent(dev->pdev, 343 sizeof(struct POSTSTATUS), &paddr); 344 if (unlikely(post == NULL)) { 345 pci_free_consistent(dev->pdev, 512, buffer, baddr); 346 return ret; 347 } 348 memset(buffer, 0, 512); 349 post->Post_Command = cpu_to_le32(COMMAND_POST_RESULTS); 350 post->Post_Address = cpu_to_le32(baddr); 351 rx_writel(dev, MUnit.IMRx[0], paddr); 352 rx_sync_cmd(dev, COMMAND_POST_RESULTS, baddr, 0, 0, 0, 0, 0, 353 NULL, NULL, NULL, NULL, NULL); 354 pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS), 355 post, paddr); 356 if (likely((buffer[0] == '0') && ((buffer[1] == 'x') || (buffer[1] == 'X')))) { 357 ret = (buffer[2] <= '9') ? (buffer[2] - '0') : (buffer[2] - 'A' + 10); 358 ret <<= 4; 359 ret += (buffer[3] <= '9') ? (buffer[3] - '0') : (buffer[3] - 'A' + 10); 360 } 361 pci_free_consistent(dev->pdev, 512, buffer, baddr); 362 return ret; 363 } 364 /* 365 * Wait for the adapter to be up and running. 366 */ 367 if (unlikely(!(status & KERNEL_UP_AND_RUNNING))) 368 return -3; 369 /* 370 * Everything is OK 371 */ 372 return 0; 373} 374 375/** 376 * aac_rx_deliver_producer 377 * @fib: fib to issue 378 * 379 * Will send a fib, returning 0 if successful. 380 */ 381int aac_rx_deliver_producer(struct fib * fib) 382{ 383 struct aac_dev *dev = fib->dev; 384 struct aac_queue *q = &dev->queues->queue[AdapNormCmdQueue]; 385 unsigned long qflags; 386 u32 Index; 387 unsigned long nointr = 0; 388 389 spin_lock_irqsave(q->lock, qflags); 390 aac_queue_get( dev, &Index, AdapNormCmdQueue, fib->hw_fib_va, 1, fib, &nointr); 391 392 q->numpending++; 393 *(q->headers.producer) = cpu_to_le32(Index + 1); 394 spin_unlock_irqrestore(q->lock, qflags); 395 if (!(nointr & aac_config.irq_mod)) 396 aac_adapter_notify(dev, AdapNormCmdQueue); 397 398 return 0; 399} 400 401/** 402 * aac_rx_deliver_message 403 * @fib: fib to issue 404 * 405 * Will send a fib, returning 0 if successful. 406 */ 407static int aac_rx_deliver_message(struct fib * fib) 408{ 409 struct aac_dev *dev = fib->dev; 410 struct aac_queue *q = &dev->queues->queue[AdapNormCmdQueue]; 411 unsigned long qflags; 412 u32 Index; 413 u64 addr; 414 volatile void __iomem *device; 415 416 unsigned long count = 10000000L; /* 50 seconds */ 417 spin_lock_irqsave(q->lock, qflags); 418 q->numpending++; 419 spin_unlock_irqrestore(q->lock, qflags); 420 for(;;) { 421 Index = rx_readl(dev, MUnit.InboundQueue); 422 if (unlikely(Index == 0xFFFFFFFFL)) 423 Index = rx_readl(dev, MUnit.InboundQueue); 424 if (likely(Index != 0xFFFFFFFFL)) 425 break; 426 if (--count == 0) { 427 spin_lock_irqsave(q->lock, qflags); 428 q->numpending--; 429 spin_unlock_irqrestore(q->lock, qflags); 430 return -ETIMEDOUT; 431 } 432 udelay(5); 433 } 434 device = dev->base + Index; 435 addr = fib->hw_fib_pa; 436 writel((u32)(addr & 0xffffffff), device); 437 device += sizeof(u32); 438 writel((u32)(addr >> 32), device); 439 device += sizeof(u32); 440 writel(le16_to_cpu(fib->hw_fib_va->header.Size), device); 441 rx_writel(dev, MUnit.InboundQueue, Index); 442 return 0; 443} 444 445/** 446 * aac_rx_ioremap 447 * @size: mapping resize request 448 * 449 */ 450static int aac_rx_ioremap(struct aac_dev * dev, u32 size) 451{ 452 if (!size) { 453 iounmap(dev->regs.rx); 454 return 0; 455 } 456 dev->base = dev->regs.rx = ioremap(dev->scsi_host_ptr->base, size); 457 if (dev->base == NULL) 458 return -1; 459 dev->IndexRegs = &dev->regs.rx->IndexRegs; 460 return 0; 461} 462 463static int aac_rx_restart_adapter(struct aac_dev *dev, int bled) 464{ 465 u32 var; 466 467 if (!(dev->supplement_adapter_info.SupportedOptions2 & 468 AAC_OPTION_MU_RESET) || (bled >= 0) || (bled == -2)) { 469 if (bled) 470 printk(KERN_ERR "%s%d: adapter kernel panic'd %x.\n", 471 dev->name, dev->id, bled); 472 else { 473 bled = aac_adapter_sync_cmd(dev, IOP_RESET_ALWAYS, 474 0, 0, 0, 0, 0, 0, &var, NULL, NULL, NULL, NULL); 475 if (!bled && (var != 0x00000001) && (var != 0x3803000F)) 476 bled = -EINVAL; 477 } 478 if (bled && (bled != -ETIMEDOUT)) 479 bled = aac_adapter_sync_cmd(dev, IOP_RESET, 480 0, 0, 0, 0, 0, 0, &var, NULL, NULL, NULL, NULL); 481 482 if (bled && (bled != -ETIMEDOUT)) 483 return -EINVAL; 484 } 485 if (bled || (var == 0x3803000F)) { /* USE_OTHER_METHOD */ 486 rx_writel(dev, MUnit.reserved2, 3); 487 msleep(5000); /* Delay 5 seconds */ 488 var = 0x00000001; 489 } 490 if (var != 0x00000001) 491 return -EINVAL; 492 if (rx_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) 493 return -ENODEV; 494 if (startup_timeout < 300) 495 startup_timeout = 300; 496 return 0; 497} 498 499/** 500 * aac_rx_select_comm - Select communications method 501 * @dev: Adapter 502 * @comm: communications method 503 */ 504 505int aac_rx_select_comm(struct aac_dev *dev, int comm) 506{ 507 switch (comm) { 508 case AAC_COMM_PRODUCER: 509 dev->a_ops.adapter_enable_int = aac_rx_enable_interrupt_producer; 510 dev->a_ops.adapter_intr = aac_rx_intr_producer; 511 dev->a_ops.adapter_deliver = aac_rx_deliver_producer; 512 break; 513 case AAC_COMM_MESSAGE: 514 dev->a_ops.adapter_enable_int = aac_rx_enable_interrupt_message; 515 dev->a_ops.adapter_intr = aac_rx_intr_message; 516 dev->a_ops.adapter_deliver = aac_rx_deliver_message; 517 break; 518 default: 519 return 1; 520 } 521 return 0; 522} 523 524/** 525 * aac_rx_init - initialize an i960 based AAC card 526 * @dev: device to configure 527 * 528 * Allocate and set up resources for the i960 based AAC variants. The 529 * device_interface in the commregion will be allocated and linked 530 * to the comm region. 531 */ 532 533int _aac_rx_init(struct aac_dev *dev) 534{ 535 unsigned long start; 536 unsigned long status; 537 int restart = 0; 538 int instance = dev->id; 539 const char * name = dev->name; 540 541 if (aac_adapter_ioremap(dev, dev->base_size)) { 542 printk(KERN_WARNING "%s: unable to map adapter.\n", name); 543 goto error_iounmap; 544 } 545 546 /* Failure to reset here is an option ... */ 547 dev->a_ops.adapter_sync_cmd = rx_sync_cmd; 548 dev->a_ops.adapter_enable_int = aac_rx_disable_interrupt; 549 dev->OIMR = status = rx_readb (dev, MUnit.OIMR); 550 if ((((status & 0x0c) != 0x0c) || aac_reset_devices || reset_devices) && 551 !aac_rx_restart_adapter(dev, 0)) 552 /* Make sure the Hardware FIFO is empty */ 553 while ((++restart < 512) && 554 (rx_readl(dev, MUnit.OutboundQueue) != 0xFFFFFFFFL)); 555 /* 556 * Check to see if the board panic'd while booting. 557 */ 558 status = rx_readl(dev, MUnit.OMRx[0]); 559 if (status & KERNEL_PANIC) { 560 if (aac_rx_restart_adapter(dev, aac_rx_check_health(dev))) 561 goto error_iounmap; 562 ++restart; 563 } 564 /* 565 * Check to see if the board failed any self tests. 566 */ 567 status = rx_readl(dev, MUnit.OMRx[0]); 568 if (status & SELF_TEST_FAILED) { 569 printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance); 570 goto error_iounmap; 571 } 572 /* 573 * Check to see if the monitor panic'd while booting. 574 */ 575 if (status & MONITOR_PANIC) { 576 printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance); 577 goto error_iounmap; 578 } 579 start = jiffies; 580 /* 581 * Wait for the adapter to be up and running. Wait up to 3 minutes 582 */ 583 while (!((status = rx_readl(dev, MUnit.OMRx[0])) & KERNEL_UP_AND_RUNNING)) 584 { 585 if ((restart && 586 (status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC))) || 587 time_after(jiffies, start+HZ*startup_timeout)) { 588 printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n", 589 dev->name, instance, status); 590 goto error_iounmap; 591 } 592 if (!restart && 593 ((status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC)) || 594 time_after(jiffies, start + HZ * 595 ((startup_timeout > 60) 596 ? (startup_timeout - 60) 597 : (startup_timeout / 2))))) { 598 if (likely(!aac_rx_restart_adapter(dev, aac_rx_check_health(dev)))) 599 start = jiffies; 600 ++restart; 601 } 602 msleep(1); 603 } 604 if (restart && aac_commit) 605 aac_commit = 1; 606 /* 607 * Fill in the common function dispatch table. 608 */ 609 dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter; 610 dev->a_ops.adapter_disable_int = aac_rx_disable_interrupt; 611 dev->a_ops.adapter_notify = aac_rx_notify_adapter; 612 dev->a_ops.adapter_sync_cmd = rx_sync_cmd; 613 dev->a_ops.adapter_check_health = aac_rx_check_health; 614 dev->a_ops.adapter_restart = aac_rx_restart_adapter; 615 616 /* 617 * First clear out all interrupts. Then enable the one's that we 618 * can handle. 619 */ 620 aac_adapter_comm(dev, AAC_COMM_PRODUCER); 621 aac_adapter_disable_int(dev); 622 rx_writel(dev, MUnit.ODR, 0xffffffff); 623 aac_adapter_enable_int(dev); 624 625 if (aac_init_adapter(dev) == NULL) 626 goto error_iounmap; 627 aac_adapter_comm(dev, dev->comm_interface); 628 if (request_irq(dev->scsi_host_ptr->irq, dev->a_ops.adapter_intr, 629 IRQF_SHARED|IRQF_DISABLED, "aacraid", dev) < 0) { 630 printk(KERN_ERR "%s%d: Interrupt unavailable.\n", 631 name, instance); 632 goto error_iounmap; 633 } 634 aac_adapter_enable_int(dev); 635 /* 636 * Tell the adapter that all is configured, and it can 637 * start accepting requests 638 */ 639 aac_rx_start_adapter(dev); 640 641 return 0; 642 643error_iounmap: 644 645 return -1; 646} 647 648int aac_rx_init(struct aac_dev *dev) 649{ 650 /* 651 * Fill in the function dispatch table. 652 */ 653 dev->a_ops.adapter_ioremap = aac_rx_ioremap; 654 dev->a_ops.adapter_comm = aac_rx_select_comm; 655 656 return _aac_rx_init(dev); 657} 658