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1 2/*3 * Adaptec AIC7xxx device driver for Linux.4 *5 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $6 *7 * Copyright (c) 1994 John Aycock8 * The University of Calgary Department of Computer Science.9 *10 * This program is free software; you can redistribute it and/or modify11 * it under the terms of the GNU General Public License as published by12 * 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 of17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the18 * GNU General Public License for more details.19 *20 * You should have received a copy of the GNU General Public License21 * along with this program; see the file COPYING. If not, write to22 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.23 *24 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F25 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA26 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,27 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,28 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file29 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,30 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the31 * ANSI SCSI-2 specification (draft 10c), ...32 *33 * --------------------------------------------------------------------------34 *35 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):36 *37 * Substantially modified to include support for wide and twin bus38 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,39 * SCB paging, and other rework of the code.40 *41 * --------------------------------------------------------------------------42 * Copyright (c) 1994-2000 Justin T. Gibbs.43 * Copyright (c) 2000-2001 Adaptec Inc.44 * All rights reserved.45 *46 * Redistribution and use in source and binary forms, with or without47 * modification, are permitted provided that the following conditions48 * are met:49 * 1. Redistributions of source code must retain the above copyright50 * notice, this list of conditions, and the following disclaimer,51 * without modification.52 * 2. Redistributions in binary form must reproduce at minimum a disclaimer53 * substantially similar to the "NO WARRANTY" disclaimer below54 * ("Disclaimer") and any redistribution must be conditioned upon55 * including a substantially similar Disclaimer requirement for further56 * binary redistribution.57 * 3. Neither the names of the above-listed copyright holders nor the names58 * of any contributors may be used to endorse or promote products derived59 * from this software without specific prior written permission.60 *61 * Alternatively, this software may be distributed under the terms of the62 * GNU General Public License ("GPL") version 2 as published by the Free63 * Software Foundation.64 *65 * NO WARRANTY66 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS67 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT68 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR69 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT70 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL71 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS72 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)73 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,74 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING75 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE76 * POSSIBILITY OF SUCH DAMAGES.77 *78 *---------------------------------------------------------------------------79 *80 * Thanks also go to (in alphabetical order) the following:81 *82 * Rory Bolt - Sequencer bug fixes83 * Jay Estabrook - Initial DEC Alpha support84 * Doug Ledford - Much needed abort/reset bug fixes85 * Kai Makisara - DMAing of SCBs86 *87 * A Boot time option was also added for not resetting the scsi bus.88 *89 * Form: aic7xxx=extended90 * aic7xxx=no_reset91 * aic7xxx=verbose92 *93 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/9794 *95 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp96 */97 98/*99 * Further driver modifications made by Doug Ledford <dledford@redhat.com>100 *101 * Copyright (c) 1997-1999 Doug Ledford102 *103 * These changes are released under the same licensing terms as the FreeBSD104 * driver written by Justin Gibbs. Please see his Copyright notice above105 * for the exact terms and conditions covering my changes as well as the106 * warranty statement.107 *108 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include109 * but are not limited to:110 *111 * 1: Import of the latest FreeBSD sequencer code for this driver112 * 2: Modification of kernel code to accommodate different sequencer semantics113 * 3: Extensive changes throughout kernel portion of driver to improve114 * abort/reset processing and error hanndling115 * 4: Other work contributed by various people on the Internet116 * 5: Changes to printk information and verbosity selection code117 * 6: General reliability related changes, especially in IRQ management118 * 7: Modifications to the default probe/attach order for supported cards119 * 8: SMP friendliness has been improved120 *121 */122 123#include "aic7xxx_osm.h"124#include "aic7xxx_inline.h"125#include <scsi/scsicam.h>126 127static struct scsi_transport_template *ahc_linux_transport_template = NULL;128 129#include <linux/init.h> /* __setup */130#include <linux/mm.h> /* For fetching system memory size */131#include <linux/blkdev.h> /* For block_size() */132#include <linux/delay.h> /* For ssleep/msleep */133#include <linux/slab.h>134 135 136/*137 * Set this to the delay in seconds after SCSI bus reset.138 * Note, we honor this only for the initial bus reset.139 * The scsi error recovery code performs its own bus settle140 * delay handling for error recovery actions.141 */142#ifdef CONFIG_AIC7XXX_RESET_DELAY_MS143#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS144#else145#define AIC7XXX_RESET_DELAY 5000146#endif147 148/*149 * To change the default number of tagged transactions allowed per-device,150 * add a line to the lilo.conf file like:151 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"152 * which will result in the first four devices on the first two153 * controllers being set to a tagged queue depth of 32.154 *155 * The tag_commands is an array of 16 to allow for wide and twin adapters.156 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15157 * for channel 1.158 */159typedef struct {160 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */161} adapter_tag_info_t;162 163/*164 * Modify this as you see fit for your system.165 *166 * 0 tagged queuing disabled167 * 1 <= n <= 253 n == max tags ever dispatched.168 *169 * The driver will throttle the number of commands dispatched to a170 * device if it returns queue full. For devices with a fixed maximum171 * queue depth, the driver will eventually determine this depth and172 * lock it in (a console message is printed to indicate that a lock173 * has occurred). On some devices, queue full is returned for a temporary174 * resource shortage. These devices will return queue full at varying175 * depths. The driver will throttle back when the queue fulls occur and176 * attempt to slowly increase the depth over time as the device recovers177 * from the resource shortage.178 *179 * In this example, the first line will disable tagged queueing for all180 * the devices on the first probed aic7xxx adapter.181 *182 * The second line enables tagged queueing with 4 commands/LUN for IDs183 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the184 * driver to attempt to use up to 64 tags for ID 1.185 *186 * The third line is the same as the first line.187 *188 * The fourth line disables tagged queueing for devices 0 and 3. It189 * enables tagged queueing for the other IDs, with 16 commands/LUN190 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for191 * IDs 2, 5-7, and 9-15.192 */193 194/*195 * NOTE: The below structure is for reference only, the actual structure196 * to modify in order to change things is just below this comment block.197adapter_tag_info_t aic7xxx_tag_info[] =198{199 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},200 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},201 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},202 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}203};204*/205 206#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE207#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE208#else209#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE210#endif211 212#define AIC7XXX_CONFIGED_TAG_COMMANDS { \213 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \214 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \215 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \216 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \217 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \218 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \219 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \220 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \221}222 223/*224 * By default, use the number of commands specified by225 * the users kernel configuration.226 */227static adapter_tag_info_t aic7xxx_tag_info[] =228{229 {AIC7XXX_CONFIGED_TAG_COMMANDS},230 {AIC7XXX_CONFIGED_TAG_COMMANDS},231 {AIC7XXX_CONFIGED_TAG_COMMANDS},232 {AIC7XXX_CONFIGED_TAG_COMMANDS},233 {AIC7XXX_CONFIGED_TAG_COMMANDS},234 {AIC7XXX_CONFIGED_TAG_COMMANDS},235 {AIC7XXX_CONFIGED_TAG_COMMANDS},236 {AIC7XXX_CONFIGED_TAG_COMMANDS},237 {AIC7XXX_CONFIGED_TAG_COMMANDS},238 {AIC7XXX_CONFIGED_TAG_COMMANDS},239 {AIC7XXX_CONFIGED_TAG_COMMANDS},240 {AIC7XXX_CONFIGED_TAG_COMMANDS},241 {AIC7XXX_CONFIGED_TAG_COMMANDS},242 {AIC7XXX_CONFIGED_TAG_COMMANDS},243 {AIC7XXX_CONFIGED_TAG_COMMANDS},244 {AIC7XXX_CONFIGED_TAG_COMMANDS}245};246 247/*248 * There should be a specific return value for this in scsi.h, but249 * it seems that most drivers ignore it.250 */251#define DID_UNDERFLOW DID_ERROR252 253void254ahc_print_path(struct ahc_softc *ahc, struct scb *scb)255{256 printk("(scsi%d:%c:%d:%d): ",257 ahc->platform_data->host->host_no,258 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',259 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,260 scb != NULL ? SCB_GET_LUN(scb) : -1);261}262 263/*264 * XXX - these options apply unilaterally to _all_ 274x/284x/294x265 * cards in the system. This should be fixed. Exceptions to this266 * rule are noted in the comments.267 */268 269/*270 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This271 * has no effect on any later resets that might occur due to things like272 * SCSI bus timeouts.273 */274static uint32_t aic7xxx_no_reset;275 276/*277 * Should we force EXTENDED translation on a controller.278 * 0 == Use whatever is in the SEEPROM or default to off279 * 1 == Use whatever is in the SEEPROM or default to on280 */281static uint32_t aic7xxx_extended;282 283/*284 * PCI bus parity checking of the Adaptec controllers. This is somewhat285 * dubious at best. To my knowledge, this option has never actually286 * solved a PCI parity problem, but on certain machines with broken PCI287 * chipset configurations where stray PCI transactions with bad parity are288 * the norm rather than the exception, the error messages can be overwhelming.289 * It's included in the driver for completeness.290 * 0 = Shut off PCI parity check291 * non-0 = reverse polarity pci parity checking292 */293static uint32_t aic7xxx_pci_parity = ~0;294 295/*296 * There are lots of broken chipsets in the world. Some of them will297 * violate the PCI spec when we issue byte sized memory writes to our298 * controller. I/O mapped register access, if allowed by the given299 * platform, will work in almost all cases.300 */301uint32_t aic7xxx_allow_memio = ~0;302 303/*304 * So that we can set how long each device is given as a selection timeout.305 * The table of values goes like this:306 * 0 - 256ms307 * 1 - 128ms308 * 2 - 64ms309 * 3 - 32ms310 * We default to 256ms because some older devices need a longer time311 * to respond to initial selection.312 */313static uint32_t aic7xxx_seltime;314 315/*316 * Certain devices do not perform any aging on commands. Should the317 * device be saturated by commands in one portion of the disk, it is318 * possible for transactions on far away sectors to never be serviced.319 * To handle these devices, we can periodically send an ordered tag to320 * force all outstanding transactions to be serviced prior to a new321 * transaction.322 */323static uint32_t aic7xxx_periodic_otag;324 325/*326 * Module information and settable options.327 */328static char *aic7xxx = NULL;329 330MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");331MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver");332MODULE_LICENSE("Dual BSD/GPL");333MODULE_VERSION(AIC7XXX_DRIVER_VERSION);334module_param(aic7xxx, charp, 0444);335MODULE_PARM_DESC(aic7xxx,336"period-delimited options string:\n"337" verbose Enable verbose/diagnostic logging\n"338" allow_memio Allow device registers to be memory mapped\n"339" debug Bitmask of debug values to enable\n"340" no_probe Toggle EISA/VLB controller probing\n"341" probe_eisa_vl Toggle EISA/VLB controller probing\n"342" no_reset Suppress initial bus resets\n"343" extended Enable extended geometry on all controllers\n"344" periodic_otag Send an ordered tagged transaction\n"345" periodically to prevent tag starvation.\n"346" This may be required by some older disk\n"347" drives or RAID arrays.\n"348" tag_info:<tag_str> Set per-target tag depth\n"349" global_tag_depth:<int> Global tag depth for every target\n"350" on every bus\n"351" seltime:<int> Selection Timeout\n"352" (0/256ms,1/128ms,2/64ms,3/32ms)\n"353"\n"354" Sample modprobe configuration file:\n"355" # Toggle EISA/VLB probing\n"356" # Set tag depth on Controller 1/Target 1 to 10 tags\n"357" # Shorten the selection timeout to 128ms\n"358"\n"359" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"360);361 362static void ahc_linux_handle_scsi_status(struct ahc_softc *,363 struct scsi_device *,364 struct scb *);365static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,366 struct scsi_cmnd *cmd);367static void ahc_linux_freeze_simq(struct ahc_softc *ahc);368static void ahc_linux_release_simq(struct ahc_softc *ahc);369static int ahc_linux_queue_recovery_cmd(struct scsi_device *sdev,370 struct scsi_cmnd *cmd);371static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);372static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,373 struct ahc_devinfo *devinfo);374static void ahc_linux_device_queue_depth(struct scsi_device *);375static int ahc_linux_run_command(struct ahc_softc*,376 struct ahc_linux_device *,377 struct scsi_cmnd *);378static void ahc_linux_setup_tag_info_global(char *p);379static int aic7xxx_setup(char *s);380 381static int ahc_linux_unit;382 383 384/************************** OS Utility Wrappers *******************************/385void386ahc_delay(long usec)387{388 /*389 * udelay on Linux can have problems for390 * multi-millisecond waits. Wait at most391 * 1024us per call.392 */393 while (usec > 0) {394 udelay(usec % 1024);395 usec -= 1024;396 }397}398 399/***************************** Low Level I/O **********************************/400uint8_t401ahc_inb(struct ahc_softc * ahc, long port)402{403 uint8_t x;404 405 if (ahc->tag == BUS_SPACE_MEMIO) {406 x = readb(ahc->bsh.maddr + port);407 } else {408 x = inb(ahc->bsh.ioport + port);409 }410 mb();411 return (x);412}413 414void415ahc_outb(struct ahc_softc * ahc, long port, uint8_t val)416{417 if (ahc->tag == BUS_SPACE_MEMIO) {418 writeb(val, ahc->bsh.maddr + port);419 } else {420 outb(val, ahc->bsh.ioport + port);421 }422 mb();423}424 425void426ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count)427{428 int i;429 430 /*431 * There is probably a more efficient way to do this on Linux432 * but we don't use this for anything speed critical and this433 * should work.434 */435 for (i = 0; i < count; i++)436 ahc_outb(ahc, port, *array++);437}438 439void440ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count)441{442 int i;443 444 /*445 * There is probably a more efficient way to do this on Linux446 * but we don't use this for anything speed critical and this447 * should work.448 */449 for (i = 0; i < count; i++)450 *array++ = ahc_inb(ahc, port);451}452 453/********************************* Inlines ************************************/454static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);455 456static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,457 struct ahc_dma_seg *sg,458 dma_addr_t addr, bus_size_t len);459 460static void461ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)462{463 struct scsi_cmnd *cmd;464 465 cmd = scb->io_ctx;466 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);467 468 scsi_dma_unmap(cmd);469}470 471static int472ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,473 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)474{475 int consumed;476 477 if ((scb->sg_count + 1) > AHC_NSEG)478 panic("Too few segs for dma mapping. "479 "Increase AHC_NSEG\n");480 481 consumed = 1;482 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);483 scb->platform_data->xfer_len += len;484 485 if (sizeof(dma_addr_t) > 4486 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)487 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;488 489 sg->len = ahc_htole32(len);490 return (consumed);491}492 493/*494 * Return a string describing the driver.495 */496static const char *497ahc_linux_info(struct Scsi_Host *host)498{499 static char buffer[512];500 char ahc_info[256];501 char *bp;502 struct ahc_softc *ahc;503 504 bp = &buffer[0];505 ahc = *(struct ahc_softc **)host->hostdata;506 memset(bp, 0, sizeof(buffer));507 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n"508 " <");509 strcat(bp, ahc->description);510 strcat(bp, ">\n"511 " ");512 ahc_controller_info(ahc, ahc_info);513 strcat(bp, ahc_info);514 strcat(bp, "\n");515 516 return (bp);517}518 519/*520 * Queue an SCB to the controller.521 */522static int ahc_linux_queue_lck(struct scsi_cmnd *cmd)523{524 struct ahc_softc *ahc;525 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);526 int rtn = SCSI_MLQUEUE_HOST_BUSY;527 unsigned long flags;528 529 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;530 531 ahc_lock(ahc, &flags);532 if (ahc->platform_data->qfrozen == 0) {533 cmd->result = CAM_REQ_INPROG << 16;534 rtn = ahc_linux_run_command(ahc, dev, cmd);535 }536 ahc_unlock(ahc, &flags);537 538 return rtn;539}540 541static DEF_SCSI_QCMD(ahc_linux_queue)542 543static inline struct scsi_target **544ahc_linux_target_in_softc(struct scsi_target *starget)545{546 struct ahc_softc *ahc =547 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);548 unsigned int target_offset;549 550 target_offset = starget->id;551 if (starget->channel != 0)552 target_offset += 8;553 554 return &ahc->platform_data->starget[target_offset];555}556 557static int558ahc_linux_target_alloc(struct scsi_target *starget)559{560 struct ahc_softc *ahc =561 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);562 struct seeprom_config *sc = ahc->seep_config;563 unsigned long flags;564 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);565 unsigned short scsirate;566 struct ahc_devinfo devinfo;567 char channel = starget->channel + 'A';568 unsigned int our_id = ahc->our_id;569 unsigned int target_offset;570 571 target_offset = starget->id;572 if (starget->channel != 0)573 target_offset += 8;574 575 if (starget->channel)576 our_id = ahc->our_id_b;577 578 ahc_lock(ahc, &flags);579 580 BUG_ON(*ahc_targp != NULL);581 582 *ahc_targp = starget;583 584 if (sc) {585 int maxsync = AHC_SYNCRATE_DT;586 int ultra = 0;587 int flags = sc->device_flags[target_offset];588 589 if (ahc->flags & AHC_NEWEEPROM_FMT) {590 if (flags & CFSYNCHISULTRA)591 ultra = 1;592 } else if (flags & CFULTRAEN)593 ultra = 1;594 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04595 * change it to ultra=0, CFXFER = 0 */596 if(ultra && (flags & CFXFER) == 0x04) {597 ultra = 0;598 flags &= ~CFXFER;599 }600 601 if ((ahc->features & AHC_ULTRA2) != 0) {602 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);603 } else {604 scsirate = (flags & CFXFER) << 4;605 maxsync = ultra ? AHC_SYNCRATE_ULTRA :606 AHC_SYNCRATE_FAST;607 }608 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;609 if (!(flags & CFSYNCH))610 spi_max_offset(starget) = 0;611 spi_min_period(starget) =612 ahc_find_period(ahc, scsirate, maxsync);613 }614 ahc_compile_devinfo(&devinfo, our_id, starget->id,615 CAM_LUN_WILDCARD, channel,616 ROLE_INITIATOR);617 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,618 AHC_TRANS_GOAL, /*paused*/FALSE);619 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,620 AHC_TRANS_GOAL, /*paused*/FALSE);621 ahc_unlock(ahc, &flags);622 623 return 0;624}625 626static void627ahc_linux_target_destroy(struct scsi_target *starget)628{629 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);630 631 *ahc_targp = NULL;632}633 634static int635ahc_linux_slave_alloc(struct scsi_device *sdev)636{637 struct ahc_softc *ahc =638 *((struct ahc_softc **)sdev->host->hostdata);639 struct scsi_target *starget = sdev->sdev_target;640 struct ahc_linux_device *dev;641 642 if (bootverbose)643 printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);644 645 dev = scsi_transport_device_data(sdev);646 memset(dev, 0, sizeof(*dev));647 648 /*649 * We start out life using untagged650 * transactions of which we allow one.651 */652 dev->openings = 1;653 654 /*655 * Set maxtags to 0. This will be changed if we656 * later determine that we are dealing with657 * a tagged queuing capable device.658 */659 dev->maxtags = 0;660 661 spi_period(starget) = 0;662 663 return 0;664}665 666static int667ahc_linux_slave_configure(struct scsi_device *sdev)668{669 if (bootverbose)670 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");671 672 ahc_linux_device_queue_depth(sdev);673 674 /* Initial Domain Validation */675 if (!spi_initial_dv(sdev->sdev_target))676 spi_dv_device(sdev);677 678 return 0;679}680 681#if defined(__i386__)682/*683 * Return the disk geometry for the given SCSI device.684 */685static int686ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,687 sector_t capacity, int geom[])688{689 int heads;690 int sectors;691 int cylinders;692 int extended;693 struct ahc_softc *ahc;694 u_int channel;695 696 ahc = *((struct ahc_softc **)sdev->host->hostdata);697 channel = sdev_channel(sdev);698 699 if (scsi_partsize(bdev, capacity, geom))700 return 0;701 702 heads = 64;703 sectors = 32;704 cylinders = aic_sector_div(capacity, heads, sectors);705 706 if (aic7xxx_extended != 0)707 extended = 1;708 else if (channel == 0)709 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;710 else711 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;712 if (extended && cylinders >= 1024) {713 heads = 255;714 sectors = 63;715 cylinders = aic_sector_div(capacity, heads, sectors);716 }717 geom[0] = heads;718 geom[1] = sectors;719 geom[2] = cylinders;720 return (0);721}722#endif723 724/*725 * Abort the current SCSI command(s).726 */727static int728ahc_linux_abort(struct scsi_cmnd *cmd)729{730 int error;731 732 error = ahc_linux_queue_recovery_cmd(cmd->device, cmd);733 if (error != SUCCESS)734 printk("aic7xxx_abort returns 0x%x\n", error);735 return (error);736}737 738/*739 * Attempt to send a target reset message to the device that timed out.740 */741static int742ahc_linux_dev_reset(struct scsi_cmnd *cmd)743{744 int error;745 746 error = ahc_linux_queue_recovery_cmd(cmd->device, NULL);747 if (error != SUCCESS)748 printk("aic7xxx_dev_reset returns 0x%x\n", error);749 return (error);750}751 752/*753 * Reset the SCSI bus.754 */755static int756ahc_linux_bus_reset(struct scsi_cmnd *cmd)757{758 struct ahc_softc *ahc;759 int found;760 unsigned long flags;761 762 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;763 764 ahc_lock(ahc, &flags);765 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',766 /*initiate reset*/TRUE);767 ahc_unlock(ahc, &flags);768 769 if (bootverbose)770 printk("%s: SCSI bus reset delivered. "771 "%d SCBs aborted.\n", ahc_name(ahc), found);772 773 return SUCCESS;774}775 776struct scsi_host_template aic7xxx_driver_template = {777 .module = THIS_MODULE,778 .name = "aic7xxx",779 .proc_name = "aic7xxx",780 .show_info = ahc_linux_show_info,781 .write_info = ahc_proc_write_seeprom,782 .info = ahc_linux_info,783 .queuecommand = ahc_linux_queue,784 .eh_abort_handler = ahc_linux_abort,785 .eh_device_reset_handler = ahc_linux_dev_reset,786 .eh_bus_reset_handler = ahc_linux_bus_reset,787#if defined(__i386__)788 .bios_param = ahc_linux_biosparam,789#endif790 .can_queue = AHC_MAX_QUEUE,791 .this_id = -1,792 .max_sectors = 8192,793 .cmd_per_lun = 2,794 .slave_alloc = ahc_linux_slave_alloc,795 .slave_configure = ahc_linux_slave_configure,796 .target_alloc = ahc_linux_target_alloc,797 .target_destroy = ahc_linux_target_destroy,798};799 800/**************************** Tasklet Handler *********************************/801 802 803static inline unsigned int ahc_build_scsiid(struct ahc_softc *ahc,804 struct scsi_device *sdev)805{806 unsigned int scsiid = (sdev->id << TID_SHIFT) & TID;807 808 if (sdev->channel == 0)809 scsiid |= ahc->our_id;810 else811 scsiid |= ahc->our_id_b | TWIN_CHNLB;812 return scsiid;813}814 815/******************************** Bus DMA *************************************/816int817ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,818 bus_size_t alignment, bus_size_t boundary,819 dma_addr_t lowaddr, dma_addr_t highaddr,820 bus_dma_filter_t *filter, void *filterarg,821 bus_size_t maxsize, int nsegments,822 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)823{824 bus_dma_tag_t dmat;825 826 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);827 if (dmat == NULL)828 return (ENOMEM);829 830 /*831 * Linux is very simplistic about DMA memory. For now don't832 * maintain all specification information. Once Linux supplies833 * better facilities for doing these operations, or the834 * needs of this particular driver change, we might need to do835 * more here.836 */837 dmat->alignment = alignment;838 dmat->boundary = boundary;839 dmat->maxsize = maxsize;840 *ret_tag = dmat;841 return (0);842}843 844void845ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)846{847 kfree(dmat);848}849 850int851ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,852 int flags, bus_dmamap_t *mapp)853{854 /* XXX: check if we really need the GFP_ATOMIC and unwind this mess! */855 *vaddr = dma_alloc_coherent(ahc->dev, dmat->maxsize, mapp, GFP_ATOMIC);856 if (*vaddr == NULL)857 return ENOMEM;858 return 0;859}860 861void862ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,863 void* vaddr, bus_dmamap_t map)864{865 dma_free_coherent(ahc->dev, dmat->maxsize, vaddr, map);866}867 868int869ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,870 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,871 void *cb_arg, int flags)872{873 /*874 * Assume for now that this will only be used during875 * initialization and not for per-transaction buffer mapping.876 */877 bus_dma_segment_t stack_sg;878 879 stack_sg.ds_addr = map;880 stack_sg.ds_len = dmat->maxsize;881 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);882 return (0);883}884 885void886ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)887{888}889 890int891ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)892{893 /* Nothing to do */894 return (0);895}896 897static void898ahc_linux_setup_tag_info_global(char *p)899{900 int tags, i, j;901 902 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;903 printk("Setting Global Tags= %d\n", tags);904 905 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) {906 for (j = 0; j < AHC_NUM_TARGETS; j++) {907 aic7xxx_tag_info[i].tag_commands[j] = tags;908 }909 }910}911 912static void913ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)914{915 916 if ((instance >= 0) && (targ >= 0)917 && (instance < ARRAY_SIZE(aic7xxx_tag_info))918 && (targ < AHC_NUM_TARGETS)) {919 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;920 if (bootverbose)921 printk("tag_info[%d:%d] = %d\n", instance, targ, value);922 }923}924 925static char *926ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,927 void (*callback)(u_long, int, int, int32_t),928 u_long callback_arg)929{930 char *tok_end;931 char *tok_end2;932 int i;933 int instance;934 int targ;935 int done;936 char tok_list[] = {'.', ',', '{', '}', '\0'};937 938 /* All options use a ':' name/arg separator */939 if (*opt_arg != ':')940 return (opt_arg);941 opt_arg++;942 instance = -1;943 targ = -1;944 done = FALSE;945 /*946 * Restore separator that may be in947 * the middle of our option argument.948 */949 tok_end = strchr(opt_arg, '\0');950 if (tok_end < end)951 *tok_end = ',';952 while (!done) {953 switch (*opt_arg) {954 case '{':955 if (instance == -1) {956 instance = 0;957 } else {958 if (depth > 1) {959 if (targ == -1)960 targ = 0;961 } else {962 printk("Malformed Option %s\n",963 opt_name);964 done = TRUE;965 }966 }967 opt_arg++;968 break;969 case '}':970 if (targ != -1)971 targ = -1;972 else if (instance != -1)973 instance = -1;974 opt_arg++;975 break;976 case ',':977 case '.':978 if (instance == -1)979 done = TRUE;980 else if (targ >= 0)981 targ++;982 else if (instance >= 0)983 instance++;984 opt_arg++;985 break;986 case '\0':987 done = TRUE;988 break;989 default:990 tok_end = end;991 for (i = 0; tok_list[i]; i++) {992 tok_end2 = strchr(opt_arg, tok_list[i]);993 if ((tok_end2) && (tok_end2 < tok_end))994 tok_end = tok_end2;995 }996 callback(callback_arg, instance, targ,997 simple_strtol(opt_arg, NULL, 0));998 opt_arg = tok_end;999 break;1000 }1001 }1002 return (opt_arg);1003}1004 1005/*1006 * Handle Linux boot parameters. This routine allows for assigning a value1007 * to a parameter with a ':' between the parameter and the value.1008 * ie. aic7xxx=stpwlev:1,extended1009 */1010static int1011aic7xxx_setup(char *s)1012{1013 int i, n;1014 char *p;1015 char *end;1016 1017 static const struct {1018 const char *name;1019 uint32_t *flag;1020 } options[] = {1021 { "extended", &aic7xxx_extended },1022 { "no_reset", &aic7xxx_no_reset },1023 { "verbose", &aic7xxx_verbose },1024 { "allow_memio", &aic7xxx_allow_memio},1025#ifdef AHC_DEBUG1026 { "debug", &ahc_debug },1027#endif1028 { "periodic_otag", &aic7xxx_periodic_otag },1029 { "pci_parity", &aic7xxx_pci_parity },1030 { "seltime", &aic7xxx_seltime },1031 { "tag_info", NULL },1032 { "global_tag_depth", NULL },1033 { "dv", NULL }1034 };1035 1036 end = strchr(s, '\0');1037 1038 /*1039 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE1040 * will never be 0 in this case.1041 */1042 n = 0;1043 1044 while ((p = strsep(&s, ",.")) != NULL) {1045 if (*p == '\0')1046 continue;1047 for (i = 0; i < ARRAY_SIZE(options); i++) {1048 1049 n = strlen(options[i].name);1050 if (strncmp(options[i].name, p, n) == 0)1051 break;1052 }1053 if (i == ARRAY_SIZE(options))1054 continue;1055 1056 if (strncmp(p, "global_tag_depth", n) == 0) {1057 ahc_linux_setup_tag_info_global(p + n);1058 } else if (strncmp(p, "tag_info", n) == 0) {1059 s = ahc_parse_brace_option("tag_info", p + n, end,1060 2, ahc_linux_setup_tag_info, 0);1061 } else if (p[n] == ':') {1062 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);1063 } else if (strncmp(p, "verbose", n) == 0) {1064 *(options[i].flag) = 1;1065 } else {1066 *(options[i].flag) ^= 0xFFFFFFFF;1067 }1068 }1069 return 1;1070}1071 1072__setup("aic7xxx=", aic7xxx_setup);1073 1074uint32_t aic7xxx_verbose;1075 1076int1077ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)1078{1079 char buf[80];1080 struct Scsi_Host *host;1081 char *new_name;1082 u_long s;1083 int retval;1084 1085 template->name = ahc->description;1086 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));1087 if (host == NULL)1088 return -ENOMEM;1089 1090 *((struct ahc_softc **)host->hostdata) = ahc;1091 ahc->platform_data->host = host;1092 host->can_queue = AHC_MAX_QUEUE;1093 host->cmd_per_lun = 2;1094 /* XXX No way to communicate the ID for multiple channels */1095 host->this_id = ahc->our_id;1096 host->irq = ahc->platform_data->irq;1097 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;1098 host->max_lun = AHC_NUM_LUNS;1099 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;1100 host->sg_tablesize = AHC_NSEG;1101 ahc_lock(ahc, &s);1102 ahc_set_unit(ahc, ahc_linux_unit++);1103 ahc_unlock(ahc, &s);1104 sprintf(buf, "scsi%d", host->host_no);1105 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);1106 if (new_name != NULL) {1107 strcpy(new_name, buf);1108 ahc_set_name(ahc, new_name);1109 }1110 host->unique_id = ahc->unit;1111 ahc_linux_initialize_scsi_bus(ahc);1112 ahc_intr_enable(ahc, TRUE);1113 1114 host->transportt = ahc_linux_transport_template;1115 1116 retval = scsi_add_host(host, ahc->dev);1117 if (retval) {1118 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");1119 scsi_host_put(host);1120 return retval;1121 }1122 1123 scsi_scan_host(host);1124 return 0;1125}1126 1127/*1128 * Place the SCSI bus into a known state by either resetting it,1129 * or forcing transfer negotiations on the next command to any1130 * target.1131 */1132static void1133ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)1134{1135 int i;1136 int numtarg;1137 unsigned long s;1138 1139 i = 0;1140 numtarg = 0;1141 1142 ahc_lock(ahc, &s);1143 1144 if (aic7xxx_no_reset != 0)1145 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);1146 1147 if ((ahc->flags & AHC_RESET_BUS_A) != 0)1148 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);1149 else1150 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;1151 1152 if ((ahc->features & AHC_TWIN) != 0) {1153 1154 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {1155 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);1156 } else {1157 if (numtarg == 0)1158 i = 8;1159 numtarg += 8;1160 }1161 }1162 1163 /*1164 * Force negotiation to async for all targets that1165 * will not see an initial bus reset.1166 */1167 for (; i < numtarg; i++) {1168 struct ahc_devinfo devinfo;1169 struct ahc_initiator_tinfo *tinfo;1170 struct ahc_tmode_tstate *tstate;1171 u_int our_id;1172 u_int target_id;1173 char channel;1174 1175 channel = 'A';1176 our_id = ahc->our_id;1177 target_id = i;1178 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {1179 channel = 'B';1180 our_id = ahc->our_id_b;1181 target_id = i % 8;1182 }1183 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,1184 target_id, &tstate);1185 ahc_compile_devinfo(&devinfo, our_id, target_id,1186 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);1187 ahc_update_neg_request(ahc, &devinfo, tstate,1188 tinfo, AHC_NEG_ALWAYS);1189 }1190 ahc_unlock(ahc, &s);1191 /* Give the bus some time to recover */1192 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {1193 ahc_linux_freeze_simq(ahc);1194 msleep(AIC7XXX_RESET_DELAY);1195 ahc_linux_release_simq(ahc);1196 }1197}1198 1199int1200ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)1201{1202 1203 ahc->platform_data =1204 kzalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC);1205 if (ahc->platform_data == NULL)1206 return (ENOMEM);1207 ahc->platform_data->irq = AHC_LINUX_NOIRQ;1208 ahc_lockinit(ahc);1209 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;1210 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;1211 if (aic7xxx_pci_parity == 0)1212 ahc->flags |= AHC_DISABLE_PCI_PERR;1213 1214 return (0);1215}1216 1217void1218ahc_platform_free(struct ahc_softc *ahc)1219{1220 struct scsi_target *starget;1221 int i;1222 1223 if (ahc->platform_data != NULL) {1224 /* destroy all of the device and target objects */1225 for (i = 0; i < AHC_NUM_TARGETS; i++) {1226 starget = ahc->platform_data->starget[i];1227 if (starget != NULL) {1228 ahc->platform_data->starget[i] = NULL;1229 }1230 }1231 1232 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)1233 free_irq(ahc->platform_data->irq, ahc);1234 if (ahc->tag == BUS_SPACE_PIO1235 && ahc->bsh.ioport != 0)1236 release_region(ahc->bsh.ioport, 256);1237 if (ahc->tag == BUS_SPACE_MEMIO1238 && ahc->bsh.maddr != NULL) {1239 iounmap(ahc->bsh.maddr);1240 release_mem_region(ahc->platform_data->mem_busaddr,1241 0x1000);1242 }1243 1244 if (ahc->platform_data->host)1245 scsi_host_put(ahc->platform_data->host);1246 1247 kfree(ahc->platform_data);1248 }1249}1250 1251void1252ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)1253{1254 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),1255 SCB_GET_CHANNEL(ahc, scb),1256 SCB_GET_LUN(scb), SCB_LIST_NULL,1257 ROLE_UNKNOWN, CAM_REQUEUE_REQ);1258}1259 1260void1261ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,1262 struct ahc_devinfo *devinfo, ahc_queue_alg alg)1263{1264 struct ahc_linux_device *dev;1265 int was_queuing;1266 int now_queuing;1267 1268 if (sdev == NULL)1269 return;1270 dev = scsi_transport_device_data(sdev);1271 1272 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);1273 switch (alg) {1274 default:1275 case AHC_QUEUE_NONE:1276 now_queuing = 0;1277 break;1278 case AHC_QUEUE_BASIC:1279 now_queuing = AHC_DEV_Q_BASIC;1280 break;1281 case AHC_QUEUE_TAGGED:1282 now_queuing = AHC_DEV_Q_TAGGED;1283 break;1284 }1285 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 01286 && (was_queuing != now_queuing)1287 && (dev->active != 0)) {1288 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;1289 dev->qfrozen++;1290 }1291 1292 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);1293 if (now_queuing) {1294 u_int usertags;1295 1296 usertags = ahc_linux_user_tagdepth(ahc, devinfo);1297 if (!was_queuing) {1298 /*1299 * Start out aggressively and allow our1300 * dynamic queue depth algorithm to take1301 * care of the rest.1302 */1303 dev->maxtags = usertags;1304 dev->openings = dev->maxtags - dev->active;1305 }1306 if (dev->maxtags == 0) {1307 /*1308 * Queueing is disabled by the user.1309 */1310 dev->openings = 1;1311 } else if (alg == AHC_QUEUE_TAGGED) {1312 dev->flags |= AHC_DEV_Q_TAGGED;1313 if (aic7xxx_periodic_otag != 0)1314 dev->flags |= AHC_DEV_PERIODIC_OTAG;1315 } else1316 dev->flags |= AHC_DEV_Q_BASIC;1317 } else {1318 /* We can only have one opening. */1319 dev->maxtags = 0;1320 dev->openings = 1 - dev->active;1321 }1322 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {1323 case AHC_DEV_Q_BASIC:1324 case AHC_DEV_Q_TAGGED:1325 scsi_change_queue_depth(sdev,1326 dev->openings + dev->active);1327 break;1328 default:1329 /*1330 * We allow the OS to queue 2 untagged transactions to1331 * us at any time even though we can only execute them1332 * serially on the controller/device. This should1333 * remove some latency.1334 */1335 scsi_change_queue_depth(sdev, 2);1336 break;1337 }1338}1339 1340int1341ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,1342 int lun, u_int tag, role_t role, uint32_t status)1343{1344 return 0;1345}1346 1347static u_int1348ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)1349{1350 static int warned_user;1351 u_int tags;1352 1353 tags = 0;1354 if ((ahc->user_discenable & devinfo->target_mask) != 0) {1355 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {1356 if (warned_user == 0) {1357 1358 printk(KERN_WARNING1359"aic7xxx: WARNING: Insufficient tag_info instances\n"1360"aic7xxx: for installed controllers. Using defaults\n"1361"aic7xxx: Please update the aic7xxx_tag_info array in\n"1362"aic7xxx: the aic7xxx_osm..c source file.\n");1363 warned_user++;1364 }1365 tags = AHC_MAX_QUEUE;1366 } else {1367 adapter_tag_info_t *tag_info;1368 1369 tag_info = &aic7xxx_tag_info[ahc->unit];1370 tags = tag_info->tag_commands[devinfo->target_offset];1371 if (tags > AHC_MAX_QUEUE)1372 tags = AHC_MAX_QUEUE;1373 }1374 }1375 return (tags);1376}1377 1378/*1379 * Determines the queue depth for a given device.1380 */1381static void1382ahc_linux_device_queue_depth(struct scsi_device *sdev)1383{1384 struct ahc_devinfo devinfo;1385 u_int tags;1386 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);1387 1388 ahc_compile_devinfo(&devinfo,1389 sdev->sdev_target->channel == 01390 ? ahc->our_id : ahc->our_id_b,1391 sdev->sdev_target->id, sdev->lun,1392 sdev->sdev_target->channel == 0 ? 'A' : 'B',1393 ROLE_INITIATOR);1394 tags = ahc_linux_user_tagdepth(ahc, &devinfo);1395 if (tags != 0 && sdev->tagged_supported != 0) {1396 1397 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);1398 ahc_send_async(ahc, devinfo.channel, devinfo.target,1399 devinfo.lun, AC_TRANSFER_NEG);1400 ahc_print_devinfo(ahc, &devinfo);1401 printk("Tagged Queuing enabled. Depth %d\n", tags);1402 } else {1403 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);1404 ahc_send_async(ahc, devinfo.channel, devinfo.target,1405 devinfo.lun, AC_TRANSFER_NEG);1406 }1407}1408 1409static int1410ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,1411 struct scsi_cmnd *cmd)1412{1413 struct scb *scb;1414 struct hardware_scb *hscb;1415 struct ahc_initiator_tinfo *tinfo;1416 struct ahc_tmode_tstate *tstate;1417 uint16_t mask;1418 struct scb_tailq *untagged_q = NULL;1419 int nseg;1420 1421 /*1422 * Schedule us to run later. The only reason we are not1423 * running is because the whole controller Q is frozen.1424 */1425 if (ahc->platform_data->qfrozen != 0)1426 return SCSI_MLQUEUE_HOST_BUSY;1427 1428 /*1429 * We only allow one untagged transaction1430 * per target in the initiator role unless1431 * we are storing a full busy target *lun*1432 * table in SCB space.1433 */1434 if (!(cmd->flags & SCMD_TAGGED)1435 && (ahc->features & AHC_SCB_BTT) == 0) {1436 int target_offset;1437 1438 target_offset = cmd->device->id + cmd->device->channel * 8;1439 untagged_q = &(ahc->untagged_queues[target_offset]);1440 if (!TAILQ_EMPTY(untagged_q))1441 /* if we're already executing an untagged command1442 * we're busy to another */1443 return SCSI_MLQUEUE_DEVICE_BUSY;1444 }1445 1446 nseg = scsi_dma_map(cmd);1447 if (nseg < 0)1448 return SCSI_MLQUEUE_HOST_BUSY;1449 1450 /*1451 * Get an scb to use.1452 */1453 scb = ahc_get_scb(ahc);1454 if (!scb) {1455 scsi_dma_unmap(cmd);1456 return SCSI_MLQUEUE_HOST_BUSY;1457 }1458 1459 scb->io_ctx = cmd;1460 scb->platform_data->dev = dev;1461 hscb = scb->hscb;1462 cmd->host_scribble = (char *)scb;1463 1464 /*1465 * Fill out basics of the HSCB.1466 */1467 hscb->control = 0;1468 hscb->scsiid = ahc_build_scsiid(ahc, cmd->device);1469 hscb->lun = cmd->device->lun;1470 mask = SCB_GET_TARGET_MASK(ahc, scb);1471 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),1472 SCB_GET_OUR_ID(scb),1473 SCB_GET_TARGET(ahc, scb), &tstate);1474 hscb->scsirate = tinfo->scsirate;1475 hscb->scsioffset = tinfo->curr.offset;1476 if ((tstate->ultraenb & mask) != 0)1477 hscb->control |= ULTRAENB;1478 1479 if ((ahc->user_discenable & mask) != 0)1480 hscb->control |= DISCENB;1481 1482 if ((tstate->auto_negotiate & mask) != 0) {1483 scb->flags |= SCB_AUTO_NEGOTIATE;1484 scb->hscb->control |= MK_MESSAGE;1485 }1486 1487 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {1488 if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH1489 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {1490 hscb->control |= ORDERED_QUEUE_TAG;1491 dev->commands_since_idle_or_otag = 0;1492 } else {1493 hscb->control |= SIMPLE_QUEUE_TAG;1494 }1495 }1496 1497 hscb->cdb_len = cmd->cmd_len;1498 if (hscb->cdb_len <= 12) {1499 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);1500 } else {1501 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);1502 scb->flags |= SCB_CDB32_PTR;1503 }1504 1505 scb->platform_data->xfer_len = 0;1506 ahc_set_residual(scb, 0);1507 ahc_set_sense_residual(scb, 0);1508 scb->sg_count = 0;1509 1510 if (nseg > 0) {1511 struct ahc_dma_seg *sg;1512 struct scatterlist *cur_seg;1513 int i;1514 1515 /* Copy the segments into the SG list. */1516 sg = scb->sg_list;1517 /*1518 * The sg_count may be larger than nseg if1519 * a transfer crosses a 32bit page.1520 */1521 scsi_for_each_sg(cmd, cur_seg, nseg, i) {1522 dma_addr_t addr;1523 bus_size_t len;1524 int consumed;1525 1526 addr = sg_dma_address(cur_seg);1527 len = sg_dma_len(cur_seg);1528 consumed = ahc_linux_map_seg(ahc, scb,1529 sg, addr, len);1530 sg += consumed;1531 scb->sg_count += consumed;1532 }1533 sg--;1534 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);1535 1536 /*1537 * Reset the sg list pointer.1538 */1539 scb->hscb->sgptr =1540 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);1541 1542 /*1543 * Copy the first SG into the "current"1544 * data pointer area.1545 */1546 scb->hscb->dataptr = scb->sg_list->addr;1547 scb->hscb->datacnt = scb->sg_list->len;1548 } else {1549 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);1550 scb->hscb->dataptr = 0;1551 scb->hscb->datacnt = 0;1552 scb->sg_count = 0;1553 }1554 1555 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);1556 dev->openings--;1557 dev->active++;1558 dev->commands_issued++;1559 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)1560 dev->commands_since_idle_or_otag++;1561 1562 scb->flags |= SCB_ACTIVE;1563 if (untagged_q) {1564 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);1565 scb->flags |= SCB_UNTAGGEDQ;1566 }1567 ahc_queue_scb(ahc, scb);1568 return 0;1569}1570 1571/*1572 * SCSI controller interrupt handler.1573 */1574irqreturn_t1575ahc_linux_isr(int irq, void *dev_id)1576{1577 struct ahc_softc *ahc;1578 u_long flags;1579 int ours;1580 1581 ahc = (struct ahc_softc *) dev_id;1582 ahc_lock(ahc, &flags);1583 ours = ahc_intr(ahc);1584 ahc_unlock(ahc, &flags);1585 return IRQ_RETVAL(ours);1586}1587 1588void1589ahc_platform_flushwork(struct ahc_softc *ahc)1590{1591 1592}1593 1594void1595ahc_send_async(struct ahc_softc *ahc, char channel,1596 u_int target, u_int lun, ac_code code)1597{1598 switch (code) {1599 case AC_TRANSFER_NEG:1600 {1601 struct scsi_target *starget;1602 struct ahc_initiator_tinfo *tinfo;1603 struct ahc_tmode_tstate *tstate;1604 int target_offset;1605 unsigned int target_ppr_options;1606 1607 BUG_ON(target == CAM_TARGET_WILDCARD);1608 1609 tinfo = ahc_fetch_transinfo(ahc, channel,1610 channel == 'A' ? ahc->our_id1611 : ahc->our_id_b,1612 target, &tstate);1613 1614 /*1615 * Don't bother reporting results while1616 * negotiations are still pending.1617 */1618 if (tinfo->curr.period != tinfo->goal.period1619 || tinfo->curr.width != tinfo->goal.width1620 || tinfo->curr.offset != tinfo->goal.offset1621 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)1622 if (bootverbose == 0)1623 break;1624 1625 /*1626 * Don't bother reporting results that1627 * are identical to those last reported.1628 */1629 target_offset = target;1630 if (channel == 'B')1631 target_offset += 8;1632 starget = ahc->platform_data->starget[target_offset];1633 if (starget == NULL)1634 break;1635 1636 target_ppr_options =1637 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)1638 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)1639 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);1640 1641 if (tinfo->curr.period == spi_period(starget)1642 && tinfo->curr.width == spi_width(starget)1643 && tinfo->curr.offset == spi_offset(starget)1644 && tinfo->curr.ppr_options == target_ppr_options)1645 if (bootverbose == 0)1646 break;1647 1648 spi_period(starget) = tinfo->curr.period;1649 spi_width(starget) = tinfo->curr.width;1650 spi_offset(starget) = tinfo->curr.offset;1651 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;1652 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;1653 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;1654 spi_display_xfer_agreement(starget);1655 break;1656 }1657 case AC_SENT_BDR:1658 {1659 WARN_ON(lun != CAM_LUN_WILDCARD);1660 scsi_report_device_reset(ahc->platform_data->host,1661 channel - 'A', target);1662 break;1663 }1664 case AC_BUS_RESET:1665 if (ahc->platform_data->host != NULL) {1666 scsi_report_bus_reset(ahc->platform_data->host,1667 channel - 'A');1668 }1669 break;1670 default:1671 panic("ahc_send_async: Unexpected async event");1672 }1673}1674 1675/*1676 * Calls the higher level scsi done function and frees the scb.1677 */1678void1679ahc_done(struct ahc_softc *ahc, struct scb *scb)1680{1681 struct scsi_cmnd *cmd;1682 struct ahc_linux_device *dev;1683 1684 LIST_REMOVE(scb, pending_links);1685 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {1686 struct scb_tailq *untagged_q;1687 int target_offset;1688 1689 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);1690 untagged_q = &(ahc->untagged_queues[target_offset]);1691 TAILQ_REMOVE(untagged_q, scb, links.tqe);1692 BUG_ON(!TAILQ_EMPTY(untagged_q));1693 } else if ((scb->flags & SCB_ACTIVE) == 0) {1694 /*1695 * Transactions aborted from the untagged queue may1696 * not have been dispatched to the controller, so1697 * only check the SCB_ACTIVE flag for tagged transactions.1698 */1699 printk("SCB %d done'd twice\n", scb->hscb->tag);1700 ahc_dump_card_state(ahc);1701 panic("Stopping for safety");1702 }1703 cmd = scb->io_ctx;1704 dev = scb->platform_data->dev;1705 dev->active--;1706 dev->openings++;1707 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {1708 cmd->result &= ~(CAM_DEV_QFRZN << 16);1709 dev->qfrozen--;1710 }1711 ahc_linux_unmap_scb(ahc, scb);1712 1713 /*1714 * Guard against stale sense data.1715 * The Linux mid-layer assumes that sense1716 * was retrieved anytime the first byte of1717 * the sense buffer looks "sane".1718 */1719 cmd->sense_buffer[0] = 0;1720 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {1721#ifdef AHC_REPORT_UNDERFLOWS1722 uint32_t amount_xferred;1723 1724 amount_xferred =1725 ahc_get_transfer_length(scb) - ahc_get_residual(scb);1726#endif1727 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {1728#ifdef AHC_DEBUG1729 if ((ahc_debug & AHC_SHOW_MISC) != 0) {1730 ahc_print_path(ahc, scb);1731 printk("Set CAM_UNCOR_PARITY\n");1732 }1733#endif1734 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);1735#ifdef AHC_REPORT_UNDERFLOWS1736 /*1737 * This code is disabled by default as some1738 * clients of the SCSI system do not properly1739 * initialize the underflow parameter. This1740 * results in spurious termination of commands1741 * that complete as expected (e.g. underflow is1742 * allowed as command can return variable amounts1743 * of data.1744 */1745 } else if (amount_xferred < scb->io_ctx->underflow) {1746 u_int i;1747 1748 ahc_print_path(ahc, scb);1749 printk("CDB:");1750 for (i = 0; i < scb->io_ctx->cmd_len; i++)1751 printk(" 0x%x", scb->io_ctx->cmnd[i]);1752 printk("\n");1753 ahc_print_path(ahc, scb);1754 printk("Saw underflow (%ld of %ld bytes). "1755 "Treated as error\n",1756 ahc_get_residual(scb),1757 ahc_get_transfer_length(scb));1758 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);1759#endif1760 } else {1761 ahc_set_transaction_status(scb, CAM_REQ_CMP);1762 }1763 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {1764 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);1765 }1766 1767 if (dev->openings == 11768 && ahc_get_transaction_status(scb) == CAM_REQ_CMP1769 && ahc_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL)1770 dev->tag_success_count++;1771 /*1772 * Some devices deal with temporary internal resource1773 * shortages by returning queue full. When the queue1774 * full occurrs, we throttle back. Slowly try to get1775 * back to our previous queue depth.1776 */1777 if ((dev->openings + dev->active) < dev->maxtags1778 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {1779 dev->tag_success_count = 0;1780 dev->openings++;1781 }1782 1783 if (dev->active == 0)1784 dev->commands_since_idle_or_otag = 0;1785 1786 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {1787 printk("Recovery SCB completes\n");1788 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT1789 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)1790 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);1791 1792 if (ahc->platform_data->eh_done)1793 complete(ahc->platform_data->eh_done);1794 }1795 1796 ahc_free_scb(ahc, scb);1797 ahc_linux_queue_cmd_complete(ahc, cmd);1798}1799 1800static void1801ahc_linux_handle_scsi_status(struct ahc_softc *ahc,1802 struct scsi_device *sdev, struct scb *scb)1803{1804 struct ahc_devinfo devinfo;1805 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);1806 1807 ahc_compile_devinfo(&devinfo,1808 ahc->our_id,1809 sdev->sdev_target->id, sdev->lun,1810 sdev->sdev_target->channel == 0 ? 'A' : 'B',1811 ROLE_INITIATOR);1812 1813 /*1814 * We don't currently trust the mid-layer to1815 * properly deal with queue full or busy. So,1816 * when one occurs, we tell the mid-layer to1817 * unconditionally requeue the command to us1818 * so that we can retry it ourselves. We also1819 * implement our own throttling mechanism so1820 * we don't clobber the device with too many1821 * commands.1822 */1823 switch (ahc_get_scsi_status(scb)) {1824 default:1825 break;1826 case SAM_STAT_CHECK_CONDITION:1827 case SAM_STAT_COMMAND_TERMINATED:1828 {1829 struct scsi_cmnd *cmd;1830 1831 /*1832 * Copy sense information to the OS's cmd1833 * structure if it is available.1834 */1835 cmd = scb->io_ctx;1836 if (scb->flags & SCB_SENSE) {1837 u_int sense_size;1838 1839 sense_size = min(sizeof(struct scsi_sense_data)1840 - ahc_get_sense_residual(scb),1841 (u_long)SCSI_SENSE_BUFFERSIZE);1842 memcpy(cmd->sense_buffer,1843 ahc_get_sense_buf(ahc, scb), sense_size);1844 if (sense_size < SCSI_SENSE_BUFFERSIZE)1845 memset(&cmd->sense_buffer[sense_size], 0,1846 SCSI_SENSE_BUFFERSIZE - sense_size);1847#ifdef AHC_DEBUG1848 if (ahc_debug & AHC_SHOW_SENSE) {1849 int i;1850 1851 printk("Copied %d bytes of sense data:",1852 sense_size);1853 for (i = 0; i < sense_size; i++) {1854 if ((i & 0xF) == 0)1855 printk("\n");1856 printk("0x%x ", cmd->sense_buffer[i]);1857 }1858 printk("\n");1859 }1860#endif1861 }1862 break;1863 }1864 case SAM_STAT_TASK_SET_FULL:1865 {1866 /*1867 * By the time the core driver has returned this1868 * command, all other commands that were queued1869 * to us but not the device have been returned.1870 * This ensures that dev->active is equal to1871 * the number of commands actually queued to1872 * the device.1873 */1874 dev->tag_success_count = 0;1875 if (dev->active != 0) {1876 /*1877 * Drop our opening count to the number1878 * of commands currently outstanding.1879 */1880 dev->openings = 0;1881/*1882 ahc_print_path(ahc, scb);1883 printk("Dropping tag count to %d\n", dev->active);1884 */1885 if (dev->active == dev->tags_on_last_queuefull) {1886 1887 dev->last_queuefull_same_count++;1888 /*1889 * If we repeatedly see a queue full1890 * at the same queue depth, this1891 * device has a fixed number of tag1892 * slots. Lock in this tag depth1893 * so we stop seeing queue fulls from1894 * this device.1895 */1896 if (dev->last_queuefull_same_count1897 == AHC_LOCK_TAGS_COUNT) {1898 dev->maxtags = dev->active;1899 ahc_print_path(ahc, scb);1900 printk("Locking max tag count at %d\n",1901 dev->active);1902 }1903 } else {1904 dev->tags_on_last_queuefull = dev->active;1905 dev->last_queuefull_same_count = 0;1906 }1907 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);1908 ahc_set_scsi_status(scb, SAM_STAT_GOOD);1909 ahc_platform_set_tags(ahc, sdev, &devinfo,1910 (dev->flags & AHC_DEV_Q_BASIC)1911 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);1912 break;1913 }1914 /*1915 * Drop down to a single opening, and treat this1916 * as if the target returned BUSY SCSI status.1917 */1918 dev->openings = 1;1919 ahc_set_scsi_status(scb, SAM_STAT_BUSY);1920 ahc_platform_set_tags(ahc, sdev, &devinfo,1921 (dev->flags & AHC_DEV_Q_BASIC)1922 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);1923 break;1924 }1925 }1926}1927 1928static void1929ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)1930{1931 /*1932 * Map CAM error codes into Linux Error codes. We1933 * avoid the conversion so that the DV code has the1934 * full error information available when making1935 * state change decisions.1936 */1937 {1938 u_int new_status;1939 1940 switch (ahc_cmd_get_transaction_status(cmd)) {1941 case CAM_REQ_INPROG:1942 case CAM_REQ_CMP:1943 case CAM_SCSI_STATUS_ERROR:1944 new_status = DID_OK;1945 break;1946 case CAM_REQ_ABORTED:1947 new_status = DID_ABORT;1948 break;1949 case CAM_BUSY:1950 new_status = DID_BUS_BUSY;1951 break;1952 case CAM_REQ_INVALID:1953 case CAM_PATH_INVALID:1954 new_status = DID_BAD_TARGET;1955 break;1956 case CAM_SEL_TIMEOUT:1957 new_status = DID_NO_CONNECT;1958 break;1959 case CAM_SCSI_BUS_RESET:1960 case CAM_BDR_SENT:1961 new_status = DID_RESET;1962 break;1963 case CAM_UNCOR_PARITY:1964 new_status = DID_PARITY;1965 break;1966 case CAM_CMD_TIMEOUT:1967 new_status = DID_TIME_OUT;1968 break;1969 case CAM_UA_ABORT:1970 case CAM_REQ_CMP_ERR:1971 case CAM_AUTOSENSE_FAIL:1972 case CAM_NO_HBA:1973 case CAM_DATA_RUN_ERR:1974 case CAM_UNEXP_BUSFREE:1975 case CAM_SEQUENCE_FAIL:1976 case CAM_CCB_LEN_ERR:1977 case CAM_PROVIDE_FAIL:1978 case CAM_REQ_TERMIO:1979 case CAM_UNREC_HBA_ERROR:1980 case CAM_REQ_TOO_BIG:1981 new_status = DID_ERROR;1982 break;1983 case CAM_REQUEUE_REQ:1984 new_status = DID_REQUEUE;1985 break;1986 default:1987 /* We should never get here */1988 new_status = DID_ERROR;1989 break;1990 }1991 1992 ahc_cmd_set_transaction_status(cmd, new_status);1993 }1994 1995 scsi_done(cmd);1996}1997 1998static void1999ahc_linux_freeze_simq(struct ahc_softc *ahc)2000{2001 unsigned long s;2002 2003 ahc_lock(ahc, &s);2004 ahc->platform_data->qfrozen++;2005 if (ahc->platform_data->qfrozen == 1) {2006 scsi_block_requests(ahc->platform_data->host);2007 2008 /* XXX What about Twin channels? */2009 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,2010 CAM_LUN_WILDCARD, SCB_LIST_NULL,2011 ROLE_INITIATOR, CAM_REQUEUE_REQ);2012 }2013 ahc_unlock(ahc, &s);2014}2015 2016static void2017ahc_linux_release_simq(struct ahc_softc *ahc)2018{2019 u_long s;2020 int unblock_reqs;2021 2022 unblock_reqs = 0;2023 ahc_lock(ahc, &s);2024 if (ahc->platform_data->qfrozen > 0)2025 ahc->platform_data->qfrozen--;2026 if (ahc->platform_data->qfrozen == 0)2027 unblock_reqs = 1;2028 ahc_unlock(ahc, &s);2029 /*2030 * There is still a race here. The mid-layer2031 * should keep its own freeze count and use2032 * a bottom half handler to run the queues2033 * so we can unblock with our own lock held.2034 */2035 if (unblock_reqs)2036 scsi_unblock_requests(ahc->platform_data->host);2037}2038 2039static int2040ahc_linux_queue_recovery_cmd(struct scsi_device *sdev,2041 struct scsi_cmnd *cmd)2042{2043 struct ahc_softc *ahc;2044 struct ahc_linux_device *dev;2045 struct scb *pending_scb = NULL, *scb;2046 u_int saved_scbptr;2047 u_int active_scb_index;2048 u_int last_phase;2049 u_int saved_scsiid;2050 u_int cdb_byte;2051 int retval;2052 int was_paused;2053 int paused;2054 int wait;2055 int disconnected;2056 unsigned long flags;2057 2058 paused = FALSE;2059 wait = FALSE;2060 ahc = *(struct ahc_softc **)sdev->host->hostdata;2061 2062 sdev_printk(KERN_INFO, sdev, "Attempting to queue a%s message\n",2063 cmd ? "n ABORT" : " TARGET RESET");2064 2065 if (cmd) {2066 printk("CDB:");2067 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)2068 printk(" 0x%x", cmd->cmnd[cdb_byte]);2069 printk("\n");2070 }2071 2072 ahc_lock(ahc, &flags);2073 2074 /*2075 * First determine if we currently own this command.2076 * Start by searching the device queue. If not found2077 * there, check the pending_scb list. If not found2078 * at all, and the system wanted us to just abort the2079 * command, return success.2080 */2081 dev = scsi_transport_device_data(sdev);2082 2083 if (dev == NULL) {2084 /*2085 * No target device for this command exists,2086 * so we must not still own the command.2087 */2088 printk("%s:%d:%d:%d: Is not an active device\n",2089 ahc_name(ahc), sdev->channel, sdev->id, (u8)sdev->lun);2090 retval = SUCCESS;2091 goto no_cmd;2092 }2093 2094 if (cmd && (dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 02095 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,2096 cmd->device->channel + 'A',2097 (u8)cmd->device->lun,2098 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {2099 printk("%s:%d:%d:%d: Command found on untagged queue\n",2100 ahc_name(ahc), cmd->device->channel, cmd->device->id,2101 (u8)cmd->device->lun);2102 retval = SUCCESS;2103 goto done;2104 }2105 2106 /*2107 * See if we can find a matching cmd in the pending list.2108 */2109 if (cmd) {2110 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {2111 if (scb->io_ctx == cmd) {2112 pending_scb = scb;2113 break;2114 }2115 }2116 } else {2117 /* Any SCB for this device will do for a target reset */2118 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {2119 if (ahc_match_scb(ahc, scb, sdev->id,2120 sdev->channel + 'A',2121 CAM_LUN_WILDCARD,2122 SCB_LIST_NULL, ROLE_INITIATOR)) {2123 pending_scb = scb;2124 break;2125 }2126 }2127 }2128 2129 if (pending_scb == NULL) {2130 sdev_printk(KERN_INFO, sdev, "Command not found\n");2131 goto no_cmd;2132 }2133 2134 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {2135 /*2136 * We can't queue two recovery actions using the same SCB2137 */2138 retval = FAILED;2139 goto done;2140 }2141 2142 /*2143 * Ensure that the card doesn't do anything2144 * behind our back and that we didn't "just" miss2145 * an interrupt that would affect this cmd.2146 */2147 was_paused = ahc_is_paused(ahc);2148 ahc_pause_and_flushwork(ahc);2149 paused = TRUE;2150 2151 if ((pending_scb->flags & SCB_ACTIVE) == 0) {2152 scmd_printk(KERN_INFO, cmd, "Command already completed\n");2153 goto no_cmd;2154 }2155 2156 printk("%s: At time of recovery, card was %spaused\n",2157 ahc_name(ahc), was_paused ? "" : "not ");2158 ahc_dump_card_state(ahc);2159 2160 disconnected = TRUE;2161 if (cmd) {2162 if (ahc_search_qinfifo(ahc, sdev->id,2163 sdev->channel + 'A',2164 sdev->lun,2165 pending_scb->hscb->tag,2166 ROLE_INITIATOR, CAM_REQ_ABORTED,2167 SEARCH_COMPLETE) > 0) {2168 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",2169 ahc_name(ahc), sdev->channel,2170 sdev->id, (u8)sdev->lun);2171 retval = SUCCESS;2172 goto done;2173 }2174 } else if (ahc_search_qinfifo(ahc, sdev->id,2175 sdev->channel + 'A',2176 sdev->lun,2177 pending_scb->hscb->tag,2178 ROLE_INITIATOR, /*status*/0,2179 SEARCH_COUNT) > 0) {2180 disconnected = FALSE;2181 }2182 2183 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {2184 struct scb *bus_scb;2185 2186 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));2187 if (bus_scb == pending_scb)2188 disconnected = FALSE;2189 else if (!cmd2190 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid2191 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))2192 disconnected = FALSE;2193 }2194 2195 /*2196 * At this point, pending_scb is the scb associated with the2197 * passed in command. That command is currently active on the2198 * bus, is in the disconnected state, or we're hoping to find2199 * a command for the same target active on the bus to abuse to2200 * send a BDR. Queue the appropriate message based on which of2201 * these states we are in.2202 */2203 last_phase = ahc_inb(ahc, LASTPHASE);2204 saved_scbptr = ahc_inb(ahc, SCBPTR);2205 active_scb_index = ahc_inb(ahc, SCB_TAG);2206 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);2207 if (last_phase != P_BUSFREE2208 && (pending_scb->hscb->tag == active_scb_index2209 || (!cmd && SCSIID_TARGET(ahc, saved_scsiid) == sdev->id))) {2210 2211 /*2212 * We're active on the bus, so assert ATN2213 * and hope that the target responds.2214 */2215 pending_scb = ahc_lookup_scb(ahc, active_scb_index);2216 pending_scb->flags |= SCB_RECOVERY_SCB;2217 pending_scb->flags |= cmd ? SCB_ABORT : SCB_DEVICE_RESET;2218 ahc_outb(ahc, MSG_OUT, HOST_MSG);2219 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);2220 sdev_printk(KERN_INFO, sdev, "Device is active, asserting ATN\n");2221 wait = TRUE;2222 } else if (disconnected) {2223 2224 /*2225 * Actually re-queue this SCB in an attempt2226 * to select the device before it reconnects.2227 * In either case (selection or reselection),2228 * we will now issue the approprate message2229 * to the timed-out device.2230 *2231 * Set the MK_MESSAGE control bit indicating2232 * that we desire to send a message. We2233 * also set the disconnected flag since2234 * in the paging case there is no guarantee2235 * that our SCB control byte matches the2236 * version on the card. We don't want the2237 * sequencer to abort the command thinking2238 * an unsolicited reselection occurred.2239 */2240 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;2241 pending_scb->flags |= SCB_RECOVERY_SCB;2242 pending_scb->flags |= cmd ? SCB_ABORT : SCB_DEVICE_RESET;2243 2244 /*2245 * Remove any cached copy of this SCB in the2246 * disconnected list in preparation for the2247 * queuing of our abort SCB. We use the2248 * same element in the SCB, SCB_NEXT, for2249 * both the qinfifo and the disconnected list.2250 */2251 ahc_search_disc_list(ahc, sdev->id,2252 sdev->channel + 'A',2253 sdev->lun, pending_scb->hscb->tag,2254 /*stop_on_first*/TRUE,2255 /*remove*/TRUE,2256 /*save_state*/FALSE);2257 2258 /*2259 * In the non-paging case, the sequencer will2260 * never re-reference the in-core SCB.2261 * To make sure we are notified during2262 * reselection, set the MK_MESSAGE flag in2263 * the card's copy of the SCB.2264 */2265 if ((ahc->flags & AHC_PAGESCBS) == 0) {2266 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);2267 ahc_outb(ahc, SCB_CONTROL,2268 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);2269 }2270 2271 /*2272 * Clear out any entries in the QINFIFO first2273 * so we are the next SCB for this target2274 * to run.2275 */2276 ahc_search_qinfifo(ahc, sdev->id,2277 sdev->channel + 'A',2278 (u8)sdev->lun, SCB_LIST_NULL,2279 ROLE_INITIATOR, CAM_REQUEUE_REQ,2280 SEARCH_COMPLETE);2281 ahc_qinfifo_requeue_tail(ahc, pending_scb);2282 ahc_outb(ahc, SCBPTR, saved_scbptr);2283 ahc_print_path(ahc, pending_scb);2284 printk("Device is disconnected, re-queuing SCB\n");2285 wait = TRUE;2286 } else {2287 sdev_printk(KERN_INFO, sdev, "Unable to deliver message\n");2288 retval = FAILED;2289 goto done;2290 }2291 2292no_cmd:2293 /*2294 * Our assumption is that if we don't have the command, no2295 * recovery action was required, so we return success. Again,2296 * the semantics of the mid-layer recovery engine are not2297 * well defined, so this may change in time.2298 */2299 retval = SUCCESS;2300done:2301 if (paused)2302 ahc_unpause(ahc);2303 if (wait) {2304 DECLARE_COMPLETION_ONSTACK(done);2305 2306 ahc->platform_data->eh_done = &done;2307 ahc_unlock(ahc, &flags);2308 2309 printk("Recovery code sleeping\n");2310 if (!wait_for_completion_timeout(&done, 5 * HZ)) {2311 ahc_lock(ahc, &flags);2312 ahc->platform_data->eh_done = NULL;2313 ahc_unlock(ahc, &flags);2314 2315 printk("Timer Expired\n");2316 retval = FAILED;2317 }2318 printk("Recovery code awake\n");2319 } else2320 ahc_unlock(ahc, &flags);2321 return (retval);2322}2323 2324static void ahc_linux_set_width(struct scsi_target *starget, int width)2325{2326 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2327 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);2328 struct ahc_devinfo devinfo;2329 unsigned long flags;2330 2331 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2332 starget->channel + 'A', ROLE_INITIATOR);2333 ahc_lock(ahc, &flags);2334 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);2335 ahc_unlock(ahc, &flags);2336}2337 2338static void ahc_linux_set_period(struct scsi_target *starget, int period)2339{2340 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2341 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);2342 struct ahc_tmode_tstate *tstate;2343 struct ahc_initiator_tinfo *tinfo2344 = ahc_fetch_transinfo(ahc,2345 starget->channel + 'A',2346 shost->this_id, starget->id, &tstate);2347 struct ahc_devinfo devinfo;2348 unsigned int ppr_options = tinfo->goal.ppr_options;2349 unsigned long flags;2350 unsigned long offset = tinfo->goal.offset;2351 const struct ahc_syncrate *syncrate;2352 2353 if (offset == 0)2354 offset = MAX_OFFSET;2355 2356 if (period < 9)2357 period = 9; /* 12.5ns is our minimum */2358 if (period == 9) {2359 if (spi_max_width(starget))2360 ppr_options |= MSG_EXT_PPR_DT_REQ;2361 else2362 /* need wide for DT and need DT for 12.5 ns */2363 period = 10;2364 }2365 2366 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2367 starget->channel + 'A', ROLE_INITIATOR);2368 2369 /* all PPR requests apart from QAS require wide transfers */2370 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {2371 if (spi_width(starget) == 0)2372 ppr_options &= MSG_EXT_PPR_QAS_REQ;2373 }2374 2375 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,2376 AHC_SYNCRATE_DT);2377 ahc_lock(ahc, &flags);2378 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,2379 ppr_options, AHC_TRANS_GOAL, FALSE);2380 ahc_unlock(ahc, &flags);2381}2382 2383static void ahc_linux_set_offset(struct scsi_target *starget, int offset)2384{2385 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2386 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);2387 struct ahc_tmode_tstate *tstate;2388 struct ahc_initiator_tinfo *tinfo2389 = ahc_fetch_transinfo(ahc,2390 starget->channel + 'A',2391 shost->this_id, starget->id, &tstate);2392 struct ahc_devinfo devinfo;2393 unsigned int ppr_options = 0;2394 unsigned int period = 0;2395 unsigned long flags;2396 const struct ahc_syncrate *syncrate = NULL;2397 2398 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2399 starget->channel + 'A', ROLE_INITIATOR);2400 if (offset != 0) {2401 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,2402 AHC_SYNCRATE_DT);2403 period = tinfo->goal.period;2404 ppr_options = tinfo->goal.ppr_options;2405 }2406 ahc_lock(ahc, &flags);2407 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,2408 ppr_options, AHC_TRANS_GOAL, FALSE);2409 ahc_unlock(ahc, &flags);2410}2411 2412static void ahc_linux_set_dt(struct scsi_target *starget, int dt)2413{2414 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2415 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);2416 struct ahc_tmode_tstate *tstate;2417 struct ahc_initiator_tinfo *tinfo2418 = ahc_fetch_transinfo(ahc,2419 starget->channel + 'A',2420 shost->this_id, starget->id, &tstate);2421 struct ahc_devinfo devinfo;2422 unsigned int ppr_options = tinfo->goal.ppr_options2423 & ~MSG_EXT_PPR_DT_REQ;2424 unsigned int period = tinfo->goal.period;2425 unsigned int width = tinfo->goal.width;2426 unsigned long flags;2427 const struct ahc_syncrate *syncrate;2428 2429 if (dt && spi_max_width(starget)) {2430 ppr_options |= MSG_EXT_PPR_DT_REQ;2431 if (!width)2432 ahc_linux_set_width(starget, 1);2433 } else if (period == 9)2434 period = 10; /* if resetting DT, period must be >= 25ns */2435 2436 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2437 starget->channel + 'A', ROLE_INITIATOR);2438 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,2439 AHC_SYNCRATE_DT);2440 ahc_lock(ahc, &flags);2441 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,2442 ppr_options, AHC_TRANS_GOAL, FALSE);2443 ahc_unlock(ahc, &flags);2444}2445 2446#if 02447/* FIXME: This code claims to support IU and QAS. However, the actual2448 * sequencer code and aic7xxx_core have no support for these parameters and2449 * will get into a bad state if they're negotiated. Do not enable this2450 * unless you know what you're doing */2451static void ahc_linux_set_qas(struct scsi_target *starget, int qas)2452{2453 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2454 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);2455 struct ahc_tmode_tstate *tstate;2456 struct ahc_initiator_tinfo *tinfo2457 = ahc_fetch_transinfo(ahc,2458 starget->channel + 'A',2459 shost->this_id, starget->id, &tstate);2460 struct ahc_devinfo devinfo;2461 unsigned int ppr_options = tinfo->goal.ppr_options2462 & ~MSG_EXT_PPR_QAS_REQ;2463 unsigned int period = tinfo->goal.period;2464 unsigned long flags;2465 struct ahc_syncrate *syncrate;2466 2467 if (qas)2468 ppr_options |= MSG_EXT_PPR_QAS_REQ;2469 2470 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2471 starget->channel + 'A', ROLE_INITIATOR);2472 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,2473 AHC_SYNCRATE_DT);2474 ahc_lock(ahc, &flags);2475 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,2476 ppr_options, AHC_TRANS_GOAL, FALSE);2477 ahc_unlock(ahc, &flags);2478}2479 2480static void ahc_linux_set_iu(struct scsi_target *starget, int iu)2481{2482 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2483 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);2484 struct ahc_tmode_tstate *tstate;2485 struct ahc_initiator_tinfo *tinfo2486 = ahc_fetch_transinfo(ahc,2487 starget->channel + 'A',2488 shost->this_id, starget->id, &tstate);2489 struct ahc_devinfo devinfo;2490 unsigned int ppr_options = tinfo->goal.ppr_options2491 & ~MSG_EXT_PPR_IU_REQ;2492 unsigned int period = tinfo->goal.period;2493 unsigned long flags;2494 struct ahc_syncrate *syncrate;2495 2496 if (iu)2497 ppr_options |= MSG_EXT_PPR_IU_REQ;2498 2499 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2500 starget->channel + 'A', ROLE_INITIATOR);2501 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,2502 AHC_SYNCRATE_DT);2503 ahc_lock(ahc, &flags);2504 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,2505 ppr_options, AHC_TRANS_GOAL, FALSE);2506 ahc_unlock(ahc, &flags);2507}2508#endif2509 2510static void ahc_linux_get_signalling(struct Scsi_Host *shost)2511{2512 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;2513 unsigned long flags;2514 u8 mode;2515 2516 if (!(ahc->features & AHC_ULTRA2)) {2517 /* non-LVD chipset, may not have SBLKCTL reg */2518 spi_signalling(shost) =2519 ahc->features & AHC_HVD ?2520 SPI_SIGNAL_HVD :2521 SPI_SIGNAL_SE;2522 return;2523 }2524 2525 ahc_lock(ahc, &flags);2526 ahc_pause(ahc);2527 mode = ahc_inb(ahc, SBLKCTL);2528 ahc_unpause(ahc);2529 ahc_unlock(ahc, &flags);2530 2531 if (mode & ENAB40)2532 spi_signalling(shost) = SPI_SIGNAL_LVD;2533 else if (mode & ENAB20)2534 spi_signalling(shost) = SPI_SIGNAL_SE;2535 else2536 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;2537}2538 2539static struct spi_function_template ahc_linux_transport_functions = {2540 .set_offset = ahc_linux_set_offset,2541 .show_offset = 1,2542 .set_period = ahc_linux_set_period,2543 .show_period = 1,2544 .set_width = ahc_linux_set_width,2545 .show_width = 1,2546 .set_dt = ahc_linux_set_dt,2547 .show_dt = 1,2548#if 02549 .set_iu = ahc_linux_set_iu,2550 .show_iu = 1,2551 .set_qas = ahc_linux_set_qas,2552 .show_qas = 1,2553#endif2554 .get_signalling = ahc_linux_get_signalling,2555};2556 2557 2558 2559static int __init2560ahc_linux_init(void)2561{2562 /*2563 * If we've been passed any parameters, process them now.2564 */2565 if (aic7xxx)2566 aic7xxx_setup(aic7xxx);2567 2568 ahc_linux_transport_template =2569 spi_attach_transport(&ahc_linux_transport_functions);2570 if (!ahc_linux_transport_template)2571 return -ENODEV;2572 2573 scsi_transport_reserve_device(ahc_linux_transport_template,2574 sizeof(struct ahc_linux_device));2575 2576 ahc_linux_pci_init();2577 ahc_linux_eisa_init();2578 return 0;2579}2580 2581static void2582ahc_linux_exit(void)2583{2584 ahc_linux_pci_exit();2585 ahc_linux_eisa_exit();2586 spi_release_transport(ahc_linux_transport_template);2587}2588 2589module_init(ahc_linux_init);2590module_exit(ahc_linux_exit);2591