patch-2.4.19 linux-2.4.19/drivers/scsi/aic7xxx/aic7xxx_linux.c
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- Lines: 2844
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
linux-2.4.18/drivers/scsi/aic7xxx/aic7xxx_linux.c
- Orig date:
Mon Feb 25 11:38:04 2002
diff -urN linux-2.4.18/drivers/scsi/aic7xxx/aic7xxx_linux.c linux-2.4.19/drivers/scsi/aic7xxx/aic7xxx_linux.c
@@ -1,2843 +0,0 @@
-/*
- * Adaptec AIC7xxx device driver for Linux.
- *
- * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_linux.c#79 $
- *
- * Copyright (c) 1994 John Aycock
- * The University of Calgary Department of Computer Science.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
- * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
- * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
- * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
- * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
- * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
- * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
- * ANSI SCSI-2 specification (draft 10c), ...
- *
- * --------------------------------------------------------------------------
- *
- * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
- *
- * Substantially modified to include support for wide and twin bus
- * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
- * SCB paging, and other rework of the code.
- *
- * --------------------------------------------------------------------------
- * Copyright (c) 1994-2000 Justin T. Gibbs.
- * Copyright (c) 2000-2001 Adaptec Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce at minimum a disclaimer
- * substantially similar to the "NO WARRANTY" disclaimer below
- * ("Disclaimer") and any redistribution must be conditioned upon
- * including a substantially similar Disclaimer requirement for further
- * binary redistribution.
- * 3. Neither the names of the above-listed copyright holders nor the names
- * of any contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- *
- * NO WARRANTY
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGES.
- *
- *---------------------------------------------------------------------------
- *
- * Thanks also go to (in alphabetical order) the following:
- *
- * Rory Bolt - Sequencer bug fixes
- * Jay Estabrook - Initial DEC Alpha support
- * Doug Ledford - Much needed abort/reset bug fixes
- * Kai Makisara - DMAing of SCBs
- *
- * A Boot time option was also added for not resetting the scsi bus.
- *
- * Form: aic7xxx=extended
- * aic7xxx=no_reset
- * aic7xxx=verbose
- *
- * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
- *
- * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp
- */
-
-/*
- * Further driver modifications made by Doug Ledford <dledford@redhat.com>
- *
- * Copyright (c) 1997-1999 Doug Ledford
- *
- * These changes are released under the same licensing terms as the FreeBSD
- * driver written by Justin Gibbs. Please see his Copyright notice above
- * for the exact terms and conditions covering my changes as well as the
- * warranty statement.
- *
- * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
- * but are not limited to:
- *
- * 1: Import of the latest FreeBSD sequencer code for this driver
- * 2: Modification of kernel code to accomodate different sequencer semantics
- * 3: Extensive changes throughout kernel portion of driver to improve
- * abort/reset processing and error hanndling
- * 4: Other work contributed by various people on the Internet
- * 5: Changes to printk information and verbosity selection code
- * 6: General reliability related changes, especially in IRQ management
- * 7: Modifications to the default probe/attach order for supported cards
- * 8: SMP friendliness has been improved
- *
- */
-
-#include "aic7xxx_osm.h"
-#include "aic7xxx_inline.h"
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
-#include <linux/init.h> /* __setup */
-#endif
-
-#include "../sd.h" /* For geometry detection */
-
-#include <linux/mm.h> /* For fetching system memory size */
-#include <linux/blk.h>
-
-/*
- * To generate the correct addresses for the controller to issue
- * on the bus. Originally added for DEC Alpha support.
- */
-#define VIRT_TO_BUS(a) (uint32_t)virt_to_bus((void *)(a))
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0)
-struct proc_dir_entry proc_scsi_aic7xxx = {
- PROC_SCSI_AIC7XXX, 7, "aic7xxx",
- S_IFDIR | S_IRUGO | S_IXUGO, 2,
- 0, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL
-};
-#endif
-
-/*
- * Set this to the delay in seconds after SCSI bus reset.
- * Note, we honor this only for the initial bus reset.
- * The scsi error recovery code performs its own bus settle
- * delay handling for error recovery actions.
- */
-#ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
-#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
-#else
-#define AIC7XXX_RESET_DELAY 5000
-#endif
-
-/*
- * Control collection of SCSI transfer statistics for the /proc filesystem.
- *
- * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
- * NOTE: This does affect performance since it has to maintain statistics.
- */
-#ifdef CONFIG_AIC7XXX_PROC_STATS
-#define AIC7XXX_PROC_STATS
-#endif
-
-/*
- * To change the default number of tagged transactions allowed per-device,
- * add a line to the lilo.conf file like:
- * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
- * which will result in the first four devices on the first two
- * controllers being set to a tagged queue depth of 32.
- *
- * The tag_commands is an array of 16 to allow for wide and twin adapters.
- * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
- * for channel 1.
- */
-typedef struct {
- uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
-} adapter_tag_info_t;
-
-/*
- * Modify this as you see fit for your system.
- *
- * 0 tagged queuing disabled
- * 1 <= n <= 253 n == max tags ever dispatched.
- *
- * The driver will throttle the number of commands dispatched to a
- * device if it returns queue full. For devices with a fixed maximum
- * queue depth, the driver will eventually determine this depth and
- * lock it in (a console message is printed to indicate that a lock
- * has occurred). On some devices, queue full is returned for a temporary
- * resource shortage. These devices will return queue full at varying
- * depths. The driver will throttle back when the queue fulls occur and
- * attempt to slowly increase the depth over time as the device recovers
- * from the resource shortage.
- *
- * In this example, the first line will disable tagged queueing for all
- * the devices on the first probed aic7xxx adapter.
- *
- * The second line enables tagged queueing with 4 commands/LUN for IDs
- * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
- * driver to attempt to use up to 64 tags for ID 1.
- *
- * The third line is the same as the first line.
- *
- * The fourth line disables tagged queueing for devices 0 and 3. It
- * enables tagged queueing for the other IDs, with 16 commands/LUN
- * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
- * IDs 2, 5-7, and 9-15.
- */
-
-/*
- * NOTE: The below structure is for reference only, the actual structure
- * to modify in order to change things is just below this comment block.
-adapter_tag_info_t aic7xxx_tag_info[] =
-{
- {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
- {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
- {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
- {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
-};
-*/
-
-#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
-#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
-#else
-#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
-#endif
-
-#define AIC7XXX_CONFIGED_TAG_COMMANDS { \
- AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
- AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
- AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
- AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
- AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
- AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
- AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
- AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
-}
-
-/*
- * By default, use the number of commands specified by
- * the users kernel configuration.
- */
-static adapter_tag_info_t aic7xxx_tag_info[] =
-{
- {AIC7XXX_CONFIGED_TAG_COMMANDS},
- {AIC7XXX_CONFIGED_TAG_COMMANDS},
- {AIC7XXX_CONFIGED_TAG_COMMANDS},
- {AIC7XXX_CONFIGED_TAG_COMMANDS},
- {AIC7XXX_CONFIGED_TAG_COMMANDS},
- {AIC7XXX_CONFIGED_TAG_COMMANDS},
- {AIC7XXX_CONFIGED_TAG_COMMANDS},
- {AIC7XXX_CONFIGED_TAG_COMMANDS},
- {AIC7XXX_CONFIGED_TAG_COMMANDS},
- {AIC7XXX_CONFIGED_TAG_COMMANDS},
- {AIC7XXX_CONFIGED_TAG_COMMANDS},
- {AIC7XXX_CONFIGED_TAG_COMMANDS},
- {AIC7XXX_CONFIGED_TAG_COMMANDS},
- {AIC7XXX_CONFIGED_TAG_COMMANDS},
- {AIC7XXX_CONFIGED_TAG_COMMANDS},
- {AIC7XXX_CONFIGED_TAG_COMMANDS}
-};
-
-/*
- * There should be a specific return value for this in scsi.h, but
- * it seems that most drivers ignore it.
- */
-#define DID_UNDERFLOW DID_ERROR
-
-void
-ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
-{
- printk("(scsi%d:%c:%d:%d): ",
- ahc->platform_data->host->host_no,
- scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
- scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
- scb != NULL ? SCB_GET_LUN(scb) : -1);
-}
-
-/*
- * XXX - these options apply unilaterally to _all_ 274x/284x/294x
- * cards in the system. This should be fixed. Exceptions to this
- * rule are noted in the comments.
- */
-
-/*
- * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
- * has no effect on any later resets that might occur due to things like
- * SCSI bus timeouts.
- */
-static uint32_t aic7xxx_no_reset;
-
-/*
- * Certain PCI motherboards will scan PCI devices from highest to lowest,
- * others scan from lowest to highest, and they tend to do all kinds of
- * strange things when they come into contact with PCI bridge chips. The
- * net result of all this is that the PCI card that is actually used to boot
- * the machine is very hard to detect. Most motherboards go from lowest
- * PCI slot number to highest, and the first SCSI controller found is the
- * one you boot from. The only exceptions to this are when a controller
- * has its BIOS disabled. So, we by default sort all of our SCSI controllers
- * from lowest PCI slot number to highest PCI slot number. We also force
- * all controllers with their BIOS disabled to the end of the list. This
- * works on *almost* all computers. Where it doesn't work, we have this
- * option. Setting this option to non-0 will reverse the order of the sort
- * to highest first, then lowest, but will still leave cards with their BIOS
- * disabled at the very end. That should fix everyone up unless there are
- * really strange cirumstances.
- */
-static int aic7xxx_reverse_scan = 0;
-
-/*
- * Should we force EXTENDED translation on a controller.
- * 0 == Use whatever is in the SEEPROM or default to off
- * 1 == Use whatever is in the SEEPROM or default to on
- */
-static uint32_t aic7xxx_extended = 0;
-
-/*
- * PCI bus parity checking of the Adaptec controllers. This is somewhat
- * dubious at best. To my knowledge, this option has never actually
- * solved a PCI parity problem, but on certain machines with broken PCI
- * chipset configurations, it can generate tons of false error messages.
- * It's included in the driver for completeness.
- * 0 = Shut off PCI parity check
- * -1 = Normal polarity pci parity checking
- * 1 = reverse polarity pci parity checking
- *
- * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
- * variable to -1 you would actually want to simply pass the variable
- * name without a number. That will invert the 0 which will result in
- * -1.
- */
-static int aic7xxx_pci_parity = 0;
-
-/*
- * Certain newer motherboards have put new PCI based devices into the
- * IO spaces that used to typically be occupied by VLB or EISA cards.
- * This overlap can cause these newer motherboards to lock up when scanned
- * for older EISA and VLB devices. Setting this option to non-0 will
- * cause the driver to skip scanning for any VLB or EISA controllers and
- * only support the PCI controllers. NOTE: this means that if the kernel
- * os compiled with PCI support disabled, then setting this to non-0
- * would result in never finding any devices :)
- */
-int aic7xxx_no_probe;
-
-/*
- * aic7xxx_detect() has been run, so register all device arrivals
- * immediately with the system rather than deferring to the sorted
- * attachment performed by aic7xxx_detect().
- */
-int aic7xxx_detect_complete;
-
-/*
- * So that we can set how long each device is given as a selection timeout.
- * The table of values goes like this:
- * 0 - 256ms
- * 1 - 128ms
- * 2 - 64ms
- * 3 - 32ms
- * We default to 256ms because some older devices need a longer time
- * to respond to initial selection.
- */
-static int aic7xxx_seltime = 0x00;
-
-/*
- * Certain devices do not perform any aging on commands. Should the
- * device be saturated by commands in one portion of the disk, it is
- * possible for transactions on far away sectors to never be serviced.
- * To handle these devices, we can periodically send an ordered tag to
- * force all outstanding transactions to be serviced prior to a new
- * transaction.
- */
-int aic7xxx_periodic_otag;
-
-/*
- * Module information and settable options.
- */
-#ifdef MODULE
-static char *aic7xxx = NULL;
-/*
- * Just in case someone uses commas to separate items on the insmod
- * command line, we define a dummy buffer here to avoid having insmod
- * write wild stuff into our code segment
- */
-static char dummy_buffer[60] = "Please don't trounce on me insmod!!\n";
-
-MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
-MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver");
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,10)
-MODULE_LICENSE("Dual BSD/GPL");
-#endif
-MODULE_PARM(aic7xxx, "s");
-MODULE_PARM_DESC(aic7xxx, "period delimited, options string.
- verbose Enable verbose/diagnostic logging
- no_probe Disable EISA/VLB controller probing
- no_reset Supress initial bus resets
- extended Enable extended geometry on all controllers
- periodic_otag Send an ordered tagged transaction periodically
- to prevent tag starvation. This may be
- required by some older disk drives/RAID arrays.
- reverse_scan Sort PCI devices highest Bus/Slot to lowest
- tag_info:<tag_str> Set per-target tag depth
- seltime:<int> Selection Timeout(0/256ms,1/128ms,2/64ms,3/32ms)
-
- Sample /etc/modules.conf line:
- Enable verbose logging
- Disable EISA/VLB probing
- Set tag depth on Controller 2/Target 2 to 10 tags
- Shorten the selection timeout to 128ms from its default of 256
-
- options aic7xxx='\"verbose.no_probe.tag_info:{{}.{}.{..10}}.seltime:1\"'
-");
-#endif
-
-static void ahc_linux_handle_scsi_status(struct ahc_softc *,
- struct ahc_linux_device *,
- struct scb *);
-static void ahc_linux_filter_command(struct ahc_softc*, Scsi_Cmnd*,
- struct scb*);
-static void ahc_linux_sem_timeout(u_long arg);
-static void ahc_linux_freeze_sim_queue(struct ahc_softc *ahc);
-static void ahc_linux_release_sim_queue(u_long arg);
-static int ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag);
-static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
-static void ahc_linux_select_queue_depth(struct Scsi_Host *host,
- Scsi_Device *scsi_devs);
-static void ahc_linux_device_queue_depth(struct ahc_softc *ahc,
- Scsi_Device *device);
-static struct ahc_linux_target* ahc_linux_alloc_target(struct ahc_softc*,
- u_int, u_int);
-static void ahc_linux_free_target(struct ahc_softc*,
- struct ahc_linux_target*);
-static struct ahc_linux_device* ahc_linux_alloc_device(struct ahc_softc*,
- struct ahc_linux_target*,
- u_int);
-static void ahc_linux_free_device(struct ahc_softc*,
- struct ahc_linux_device*);
-static void ahc_linux_run_device_queue(struct ahc_softc*,
- struct ahc_linux_device*);
-static void ahc_linux_setup_tag_info(char *p, char *end);
-static int ahc_linux_next_unit(void);
-static int ahc_linux_halt(struct notifier_block *nb, u_long event, void *buf);
-
-static __inline struct ahc_linux_device*
- ahc_linux_get_device(struct ahc_softc *ahc, u_int channel,
- u_int target, u_int lun, int alloc);
-static __inline void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
- Scsi_Cmnd *cmd);
-static __inline void ahc_linux_run_complete_queue(struct ahc_softc *ahc,
- struct ahc_cmd *acmd);
-static __inline void ahc_linux_check_device_queue(struct ahc_softc *ahc,
- struct ahc_linux_device *dev);
-static __inline void ahc_linux_sniff_command(struct ahc_softc*, Scsi_Cmnd*,
- struct scb*);
-static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
-
-static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
- struct ahc_dma_seg *sg,
- bus_addr_t addr, bus_size_t len);
-
-static __inline struct ahc_linux_device*
-ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, u_int target,
- u_int lun, int alloc)
-{
- struct ahc_linux_target *targ;
- struct ahc_linux_device *dev;
- u_int target_offset;
-
- target_offset = target;
- if (channel != 0)
- target_offset += 8;
- targ = ahc->platform_data->targets[target_offset];
- if (targ == NULL) {
- if (alloc != 0) {
- targ = ahc_linux_alloc_target(ahc, channel, target);
- if (targ == NULL)
- return (NULL);
- } else
- return (NULL);
- }
- dev = targ->devices[lun];
- if (dev == NULL && alloc != 0)
- dev = ahc_linux_alloc_device(ahc, targ, lun);
- return (dev);
-}
-
-static __inline void
-ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, Scsi_Cmnd *cmd)
-{
- /*
- * Typically, the complete queue has very few entries
- * queued to it before the queue is emptied by
- * ahc_linux_run_complete_queue, so sorting the entries
- * by generation number should be inexpensive.
- * We perform the sort so that commands that complete
- * with an error are retuned in the order origionally
- * queued to the controller so that any subsequent retries
- * are performed in order. The underlying ahc routines do
- * not guarantee the order that aborted commands will be
- * returned to us.
- */
- struct ahc_completeq *completeq;
- struct ahc_cmd *list_cmd;
- struct ahc_cmd *acmd;
-
- /*
- * If we want the request requeued, make sure there
- * are sufficent retries. In the old scsi error code,
- * we used to be able to specify a result code that
- * bypassed the retry count. Now we must use this
- * hack.
- */
- if (cmd->result == (CAM_REQUEUE_REQ << 16))
- cmd->retries--;
- completeq = &ahc->platform_data->completeq;
- list_cmd = TAILQ_FIRST(completeq);
- acmd = (struct ahc_cmd *)cmd;
- while (list_cmd != NULL
- && acmd_scsi_cmd(list_cmd).serial_number
- < acmd_scsi_cmd(acmd).serial_number)
- list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
- if (list_cmd != NULL)
- TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
- else
- TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
-}
-
-static __inline void
-ahc_linux_run_complete_queue(struct ahc_softc *ahc, struct ahc_cmd *acmd)
-{
- u_long done_flags;
-
- ahc_done_lock(ahc, &done_flags);
- while (acmd != NULL) {
- Scsi_Cmnd *cmd;
-
- cmd = &acmd_scsi_cmd(acmd);
- acmd = TAILQ_NEXT(acmd, acmd_links.tqe);
- cmd->host_scribble = NULL;
- cmd->scsi_done(cmd);
- }
- ahc_done_unlock(ahc, &done_flags);
-}
-
-static __inline void
-ahc_linux_check_device_queue(struct ahc_softc *ahc,
- struct ahc_linux_device *dev)
-{
- if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) != 0
- && dev->active == 0) {
- dev->flags &= ~AHC_DEV_FREEZE_TIL_EMPTY;
- dev->qfrozen--;
- }
-
- if (TAILQ_FIRST(&dev->busyq) == NULL
- || dev->openings == 0 || dev->qfrozen != 0)
- return;
-
- ahc_linux_run_device_queue(ahc, dev);
-}
-
-static __inline void
-ahc_linux_run_device_queues(struct ahc_softc *ahc)
-{
- struct ahc_linux_device *dev;
-
- while ((ahc->flags & AHC_RESOURCE_SHORTAGE) == 0
- && ahc->platform_data->qfrozen == 0
- && (dev = TAILQ_FIRST(&ahc->platform_data->device_runq)) != NULL) {
- TAILQ_REMOVE(&ahc->platform_data->device_runq, dev, links);
- dev->flags &= ~AHC_DEV_ON_RUN_LIST;
- ahc_linux_check_device_queue(ahc, dev);
- }
-}
-
-static __inline void
-ahc_linux_sniff_command(struct ahc_softc *ahc, Scsi_Cmnd *cmd, struct scb *scb)
-{
- /*
- * Determine whether we care to filter
- * information out of this command. If so,
- * pass it on to ahc_linux_filter_command() for more
- * heavy weight processing.
- */
- if (cmd->cmnd[0] == INQUIRY)
- ahc_linux_filter_command(ahc, cmd, scb);
-}
-
-static __inline void
-ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
-{
- Scsi_Cmnd *cmd;
-
- cmd = scb->io_ctx;
- ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
- if (cmd->use_sg != 0) {
- struct scatterlist *sg;
-
- sg = (struct scatterlist *)cmd->request_buffer;
- pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg,
- scsi_to_pci_dma_dir(cmd->sc_data_direction));
- } else if (cmd->request_bufflen != 0) {
- u_int32_t high_addr;
-
- high_addr = ahc_le32toh(scb->sg_list[0].len)
- & AHC_SG_HIGH_ADDR_MASK;
- pci_unmap_single(ahc->dev_softc,
- ahc_le32toh(scb->sg_list[0].addr)
- | (((dma_addr_t)high_addr) << 8),
- cmd->request_bufflen,
- scsi_to_pci_dma_dir(cmd->sc_data_direction));
- }
-}
-
-static __inline int
-ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
- struct ahc_dma_seg *sg, bus_addr_t addr, bus_size_t len)
-{
- int consumed;
-
- if ((scb->sg_count + 1) > AHC_NSEG)
- panic("Too few segs for dma mapping. "
- "Increase AHC_NSEG\n");
-
- consumed = 1;
- sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
- scb->platform_data->xfer_len += len;
- if (sizeof(bus_addr_t) > 4
- && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) {
- /*
- * Due to DAC restrictions, we can't
- * cross a 4GB boundary.
- */
- if ((addr ^ (addr + len - 1)) & ~0xFFFFFFFF) {
- struct ahc_dma_seg *next_sg;
- uint32_t next_len;
-
- printf("Crossed Seg\n");
- if ((scb->sg_count + 2) > AHC_NSEG)
- panic("Too few segs for dma mapping. "
- "Increase AHC_NSEG\n");
-
- consumed++;
- next_sg = sg + 1;
- next_sg->addr = 0;
- next_len = 0x100000000 - (addr & 0xFFFFFFFF);
- len -= next_len;
- next_len |= ((addr >> 8) + 0x1000000) & 0x7F000000;
- next_sg->len = ahc_htole32(next_len);
- }
- len |= (addr >> 8) & 0x7F000000;
- }
- sg->len = ahc_htole32(len);
- return (consumed);
-}
-
-/************************ Shutdown/halt/reboot hook ***************************/
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-
-static struct notifier_block ahc_linux_notifier = {
- ahc_linux_halt, NULL, 0
-};
-
-static int ahc_linux_halt(struct notifier_block *nb, u_long event, void *buf)
-{
- struct ahc_softc *ahc;
-
- if (event == SYS_DOWN || event == SYS_HALT) {
- TAILQ_FOREACH(ahc, &ahc_tailq, links) {
- ahc_shutdown(ahc);
- }
- }
- return (NOTIFY_OK);
-}
-
-/******************************** Macros **************************************/
-#define BUILD_SCSIID(ahc, cmd) \
- ((((cmd)->target << TID_SHIFT) & TID) \
- | (((cmd)->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
- | (((cmd)->channel == 0) ? 0 : TWIN_CHNLB))
-
-/******************************** Bus DMA *************************************/
-int
-ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
- bus_size_t alignment, bus_size_t boundary,
- bus_addr_t lowaddr, bus_addr_t highaddr,
- bus_dma_filter_t *filter, void *filterarg,
- bus_size_t maxsize, int nsegments,
- bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
-{
- bus_dma_tag_t dmat;
-
- dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
- if (dmat == NULL)
- return (ENOMEM);
-
- /*
- * Linux is very simplistic about DMA memory. For now don't
- * maintain all specification information. Once Linux supplies
- * better facilities for doing these operations, or the
- * needs of this particular driver change, we might need to do
- * more here.
- */
- dmat->alignment = alignment;
- dmat->boundary = boundary;
- dmat->maxsize = maxsize;
- *ret_tag = dmat;
- return (0);
-}
-
-void
-ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
-{
- free(dmat, M_DEVBUF);
-}
-
-int
-ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
- int flags, bus_dmamap_t *mapp)
-{
- bus_dmamap_t map;
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
- map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT);
- if (map == NULL)
- return (ENOMEM);
- /*
- * Although we can dma data above 4GB, our
- * "consistent" memory is below 4GB for
- * space efficiency reasons (only need a 4byte
- * address). For this reason, we have to reset
- * our dma mask when doing allocations.
- */
- if(ahc->dev_softc)
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,3)
- pci_set_dma_mask(ahc->dev_softc, 0xFFFFFFFF);
-#else
- ahc->dev_softc->dma_mask = 0xFFFFFFFF;
-#endif
- *vaddr = pci_alloc_consistent(ahc->dev_softc,
- dmat->maxsize, &map->bus_addr);
- if (ahc->dev_softc)
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,3)
- pci_set_dma_mask(ahc->dev_softc, ahc->platform_data->hw_dma_mask);
-#else
- ahc->dev_softc->dma_mask = ahc->platform_data->hw_dma_mask;
-#endif
-#else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0) */
- /*
- * At least in 2.2.14, malloc is a slab allocator so all
- * allocations are aligned. We assume for these kernel versions
- * that all allocations will be bellow 4Gig, physically contiguous,
- * and accessable via DMA by the controller.
- */
- map = NULL; /* No additional information to store */
- *vaddr = malloc(dmat->maxsize, M_DEVBUF, M_NOWAIT);
-#endif
- if (*vaddr == NULL)
- return (ENOMEM);
- *mapp = map;
- return(0);
-}
-
-void
-ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
- void* vaddr, bus_dmamap_t map)
-{
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
- pci_free_consistent(ahc->dev_softc, dmat->maxsize,
- vaddr, map->bus_addr);
-#else
- free(vaddr, M_DEVBUF);
-#endif
-}
-
-int
-ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
- void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
- void *cb_arg, int flags)
-{
- /*
- * Assume for now that this will only be used during
- * initialization and not for per-transaction buffer mapping.
- */
- bus_dma_segment_t stack_sg;
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
- stack_sg.ds_addr = map->bus_addr;
-#else
- stack_sg.ds_addr = VIRT_TO_BUS(buf);
-#endif
- stack_sg.ds_len = dmat->maxsize;
- cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
- return (0);
-}
-
-void
-ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
-{
- /*
- * The map may is NULL in our < 2.3.X implementation.
- */
- if (map != NULL)
- free(map, M_DEVBUF);
-}
-
-int
-ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
-{
- /* Nothing to do */
- return (0);
-}
-
-/********************* Platform Dependent Functions ***************************/
-int
-ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc)
-{
- int value;
- int rvalue;
- int lvalue;
-
- /*
- * Under Linux, cards are ordered as follows:
- * 1) VLB/EISA BIOS enabled devices sorted by BIOS address.
- * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
- * 3) All remaining VLB/EISA devices sorted by ioport.
- * 4) All remaining PCI devices sorted by bus/slot/func.
- */
- value = (lahc->flags & AHC_BIOS_ENABLED)
- - (rahc->flags & AHC_BIOS_ENABLED);
- if (value != 0)
- /* Controllers with BIOS enabled have a *higher* priority */
- return (-value);
-
- /*
- * Same BIOS setting, now sort based on bus type.
- * EISA and VL controllers sort together. EISA/VL
- * have higher priority than PCI.
- */
- rvalue = (rahc->chip & AHC_BUS_MASK);
- if (rvalue == AHC_VL)
- rvalue = AHC_EISA;
- lvalue = (lahc->chip & AHC_BUS_MASK);
- if (lvalue == AHC_VL)
- lvalue = AHC_EISA;
- value = lvalue - rvalue;
- if (value != 0)
- return (value);
-
- /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */
- switch (rvalue) {
- case AHC_PCI:
- {
- char primary_channel;
-
- if (aic7xxx_reverse_scan != 0)
- value = ahc_get_pci_bus(rahc->dev_softc)
- - ahc_get_pci_bus(lahc->dev_softc);
- else
- value = ahc_get_pci_bus(lahc->dev_softc)
- - ahc_get_pci_bus(rahc->dev_softc);
- if (value != 0)
- break;
- if (aic7xxx_reverse_scan != 0)
- value = ahc_get_pci_slot(rahc->dev_softc)
- - ahc_get_pci_slot(lahc->dev_softc);
- else
- value = ahc_get_pci_slot(lahc->dev_softc)
- - ahc_get_pci_slot(rahc->dev_softc);
- if (value != 0)
- break;
- /*
- * On multi-function devices, the user can choose
- * to have function 1 probed before function 0.
- * Give whichever channel is the primary channel
- * the lowest priority.
- */
- primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A';
- value = 1;
- if (lahc->channel == primary_channel)
- value = -1;
- break;
- }
- case AHC_EISA:
- if ((rahc->flags & AHC_BIOS_ENABLED) != 0) {
- value = lahc->platform_data->bios_address
- - rahc->platform_data->bios_address;
- } else {
- value = lahc->bsh.ioport
- - rahc->bsh.ioport;
- }
- break;
- default:
- panic("ahc_softc_sort: invalid bus type");
- }
- return (value);
-}
-
-static void
-ahc_linux_setup_tag_info(char *p, char *end)
-{
- char *base;
- char *tok;
- char *tok_end;
- char *tok_end2;
- int i;
- int instance;
- int targ;
- int done;
- char tok_list[] = {'.', ',', '{', '}', '\0'};
-
- if (*p != ':')
- return;
-
- instance = -1;
- targ = -1;
- done = FALSE;
- base = p;
- /* Forward us just past the ':' */
- tok = base + 1;
- tok_end = strchr(tok, '\0');
- if (tok_end < end)
- *tok_end = ',';
- while (!done) {
- switch (*tok) {
- case '{':
- if (instance == -1)
- instance = 0;
- else if (targ == -1)
- targ = 0;
- tok++;
- break;
- case '}':
- if (targ != -1)
- targ = -1;
- else if (instance != -1)
- instance = -1;
- tok++;
- break;
- case ',':
- case '.':
- if (instance == -1)
- done = TRUE;
- else if (targ >= 0)
- targ++;
- else if (instance >= 0)
- instance++;
- if ((targ >= AHC_NUM_TARGETS) ||
- (instance >= NUM_ELEMENTS(aic7xxx_tag_info)))
- done = TRUE;
- tok++;
- if (!done) {
- base = tok;
- }
- break;
- case '\0':
- done = TRUE;
- break;
- default:
- done = TRUE;
- tok_end = strchr(tok, '\0');
- for (i = 0; tok_list[i]; i++) {
- tok_end2 = strchr(tok, tok_list[i]);
- if ((tok_end2) && (tok_end2 < tok_end)) {
- tok_end = tok_end2;
- done = FALSE;
- }
- }
- if ((instance >= 0) && (targ >= 0)
- && (instance < NUM_ELEMENTS(aic7xxx_tag_info))
- && (targ < AHC_NUM_TARGETS)) {
- aic7xxx_tag_info[instance].tag_commands[targ] =
- simple_strtoul(tok, NULL, 0) & 0xff;
- }
- tok = tok_end;
- break;
- }
- }
- while ((p != base) && (p != NULL))
- p = strtok(NULL, ",.");
-}
-
-/*
- * Handle Linux boot parameters. This routine allows for assigning a value
- * to a parameter with a ':' between the parameter and the value.
- * ie. aic7xxx=stpwlev:1,extended
- */
-int
-aic7xxx_setup(char *s)
-{
- int i, n;
- char *p;
- char *end;
-
- static struct {
- const char *name;
- uint32_t *flag;
- } options[] = {
- { "extended", &aic7xxx_extended },
- { "no_reset", &aic7xxx_no_reset },
- { "verbose", &aic7xxx_verbose },
- { "reverse_scan", &aic7xxx_reverse_scan },
- { "no_probe", &aic7xxx_no_probe },
- { "periodic_otag", &aic7xxx_periodic_otag },
- { "pci_parity", &aic7xxx_pci_parity },
- { "seltime", &aic7xxx_seltime },
- { "tag_info", NULL }
- };
-
- end = strchr(s, '\0');
-
- for (p = strtok(s, ",."); p; p = strtok(NULL, ",.")) {
- for (i = 0; i < NUM_ELEMENTS(options); i++) {
- n = strlen(options[i].name);
-
- if (strncmp(options[i].name, p, n) != 0)
- continue;
-
- if (strncmp(p, "tag_info", n) == 0) {
- ahc_linux_setup_tag_info(p + n, end);
- } else if (p[n] == ':') {
- *(options[i].flag) =
- simple_strtoul(p + n + 1, NULL, 0);
- } else if (!strncmp(p, "verbose", n)) {
- *(options[i].flag) = 1;
- } else {
- *(options[i].flag) = ~(*(options[i].flag));
- }
- break;
- }
- }
- register_reboot_notifier(&ahc_linux_notifier);
- return 1;
-}
-
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0)
-__setup("aic7xxx=", aic7xxx_setup);
-#endif
-
-int aic7xxx_verbose;
-
-/*
- * Try to detect an Adaptec 7XXX controller.
- */
-int
-ahc_linux_detect(Scsi_Host_Template *template)
-{
- struct ahc_softc *ahc;
- int found;
-
- /*
- * Sanity checking of Linux SCSI data structures so
- * that some of our hacks^H^H^H^H^Hassumptions aren't
- * violated.
- */
- if (offsetof(struct ahc_cmd_internal, end)
- > offsetof(struct scsi_cmnd, host_scribble)) {
- printf("ahc_linux_detect: SCSI data structures changed.\n");
- printf("ahc_linux_detect: Unable to attach\n");
- return (0);
- }
-#ifdef MODULE
- /*
- * If we've been passed any parameters, process them now.
- */
- if (aic7xxx)
- aic7xxx_setup(aic7xxx);
- if (dummy_buffer[0] != 'P')
- printk(KERN_WARNING
-"aic7xxx: Please read the file /usr/src/linux/drivers/scsi/README.aic7xxx\n"
-"aic7xxx: to see the proper way to specify options to the aic7xxx module\n"
-"aic7xxx: Specifically, don't use any commas when passing arguments to\n"
-"aic7xxx: insmod or else it might trash certain memory areas.\n");
-#endif
-
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0)
- template->proc_name = "aic7xxx";
-#else
- template->proc_dir = &proc_scsi_aic7xxx;
-#endif
- template->sg_tablesize = AHC_NSEG;
-
-#ifdef CONFIG_PCI
- ahc_linux_pci_probe(template);
-#endif
-
- if (aic7xxx_no_probe == 0)
- aic7770_linux_probe(template);
-
- /*
- * Register with the SCSI layer all
- * controllers we've found.
- */
- found = 0;
- TAILQ_FOREACH(ahc, &ahc_tailq, links) {
-
- if (ahc_linux_register_host(ahc, template) == 0)
- found++;
- }
- aic7xxx_detect_complete++;
- return (found);
-}
-
-int
-ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template)
-{
- char buf[80];
- struct Scsi_Host *host;
- char *new_name;
- u_long s;
-
-
- template->name = ahc->description;
- host = scsi_register(template, sizeof(struct ahc_softc *));
- if (host == NULL)
- return (ENOMEM);
-
- ahc_lock(ahc, &s);
- *((struct ahc_softc **)host->hostdata) = ahc;
- ahc->platform_data->host = host;
- host->can_queue = AHC_MAX_QUEUE;
- host->cmd_per_lun = 2;
- host->sg_tablesize = AHC_NSEG;
- host->select_queue_depths = ahc_linux_select_queue_depth;
- /* XXX No way to communicate the ID for multiple channels */
- host->this_id = ahc->our_id;
- host->irq = ahc->platform_data->irq;
- host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
- host->max_lun = AHC_NUM_LUNS;
- host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
- ahc_set_unit(ahc, ahc_linux_next_unit());
- sprintf(buf, "scsi%d", host->host_no);
- new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
- if (new_name != NULL) {
- strcpy(new_name, buf);
- ahc_set_name(ahc, new_name);
- }
- host->unique_id = ahc->unit;
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,4)
- scsi_set_pci_device(host, ahc->dev_softc);
-#endif
- ahc_linux_initialize_scsi_bus(ahc);
- ahc_unlock(ahc, &s);
- return (0);
-}
-
-uint64_t
-ahc_linux_get_memsize()
-{
- struct sysinfo si;
-
- si_meminfo(&si);
- return (si.totalram << PAGE_SHIFT);
-}
-
-/*
- * Find the smallest available unit number to use
- * for a new device. We don't just use a static
- * count to handle the "repeated hot-(un)plug"
- * scenario.
- */
-static int
-ahc_linux_next_unit()
-{
- struct ahc_softc *ahc;
- int unit;
-
- unit = 0;
-retry:
- TAILQ_FOREACH(ahc, &ahc_tailq, links) {
- if (ahc->unit == unit) {
- unit++;
- goto retry;
- }
- }
- return (unit);
-}
-
-/*
- * Place the SCSI bus into a known state by either resetting it,
- * or forcing transfer negotiations on the next command to any
- * target.
- */
-void
-ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
-{
- int i;
- int numtarg;
-
- i = 0;
- numtarg = 0;
-
- if (aic7xxx_no_reset != 0)
- ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
-
- if ((ahc->flags & AHC_RESET_BUS_A) != 0)
- ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
- else
- numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
-
- if ((ahc->features & AHC_TWIN) != 0) {
-
- if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
- ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
- } else {
- if (numtarg == 0)
- i = 8;
- numtarg += 8;
- }
- }
-
- for (; i < numtarg; i++) {
- struct ahc_devinfo devinfo;
- struct ahc_initiator_tinfo *tinfo;
- struct ahc_tmode_tstate *tstate;
- u_int our_id;
- u_int target_id;
- char channel;
-
- channel = 'A';
- our_id = ahc->our_id;
- target_id = i;
- if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
- channel = 'B';
- our_id = ahc->our_id_b;
- target_id = i % 8;
- }
- tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
- target_id, &tstate);
- tinfo->goal = tinfo->user;
- /*
- * Don't try negotiations that require PPR messages
- * until we successfully retrieve Inquiry data.
- */
- tinfo->goal.ppr_options = 0;
- if (tinfo->goal.transport_version > SCSI_REV_2)
- tinfo->goal.transport_version = SCSI_REV_2;
- ahc_compile_devinfo(&devinfo, our_id, target_id,
- CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
- ahc_update_neg_request(ahc, &devinfo, tstate,
- tinfo, /*force*/FALSE);
- }
- /* Give the bus some time to recover */
- if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
- ahc_linux_freeze_sim_queue(ahc);
- init_timer(&ahc->platform_data->reset_timer);
- ahc->platform_data->reset_timer.data = (u_long)ahc;
- ahc->platform_data->reset_timer.expires =
- jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000;
- ahc->platform_data->reset_timer.function =
- ahc_linux_release_sim_queue;
- add_timer(&ahc->platform_data->reset_timer);
- }
-}
-
-int
-ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
-{
- ahc->platform_data =
- malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
- if (ahc->platform_data == NULL)
- return (ENOMEM);
- memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
- TAILQ_INIT(&ahc->platform_data->completeq);
- TAILQ_INIT(&ahc->platform_data->device_runq);
- ahc->platform_data->hw_dma_mask = 0xFFFFFFFF;
- ahc_lockinit(ahc);
- ahc_done_lockinit(ahc);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
- init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
-#else
- ahc->platform_data->eh_sem = MUTEX_LOCKED;
-#endif
- ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
- ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
- return (0);
-}
-
-void
-ahc_platform_free(struct ahc_softc *ahc)
-{
- if (ahc->platform_data != NULL) {
- if (ahc->platform_data->host != NULL)
- scsi_unregister(ahc->platform_data->host);
- if (ahc->platform_data->irq)
- free_irq(ahc->platform_data->irq, ahc);
- if (ahc->tag == BUS_SPACE_PIO
- && ahc->bsh.ioport != 0)
- release_region(ahc->bsh.ioport, 256);
- if (ahc->tag == BUS_SPACE_MEMIO
- && ahc->bsh.maddr != NULL) {
- u_long base_addr;
-
- base_addr = (u_long)ahc->bsh.maddr;
- base_addr &= PAGE_MASK;
- iounmap((void *)base_addr);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
- release_mem_region(ahc->platform_data->mem_busaddr,
- 0x1000);
-#endif
- }
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
- /* XXX Need an instance detach in the PCI code */
- if (ahc->dev_softc != NULL)
- ahc->dev_softc->driver = NULL;
-#endif
- free(ahc->platform_data, M_DEVBUF);
- }
-}
-
-void
-ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
-{
- ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
- SCB_GET_CHANNEL(ahc, scb),
- SCB_GET_LUN(scb), SCB_LIST_NULL,
- ROLE_UNKNOWN, CAM_REQUEUE_REQ);
-}
-
-void
-ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
- ahc_queue_alg alg)
-{
- struct ahc_linux_device *dev;
- int was_queuing;
- int now_queuing;
-
- dev = ahc_linux_get_device(ahc, devinfo->channel - 'A',
- devinfo->target,
- devinfo->lun, /*alloc*/FALSE);
- if (dev == NULL)
- return;
- was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
- now_queuing = alg != AHC_QUEUE_NONE;
- if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
- && (was_queuing != now_queuing)
- && (dev->active != 0)) {
- dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
- dev->qfrozen++;
- }
-
- dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
- if (now_queuing) {
-
- if (!was_queuing) {
- /*
- * Start out agressively and allow our
- * dynamic queue depth algorithm to take
- * care of the rest.
- */
- dev->maxtags = AHC_MAX_QUEUE;
- dev->openings = dev->maxtags - dev->active;
- }
- if (alg == AHC_QUEUE_TAGGED) {
- dev->flags |= AHC_DEV_Q_TAGGED;
- if (aic7xxx_periodic_otag != 0)
- dev->flags |= AHC_DEV_PERIODIC_OTAG;
- } else
- dev->flags |= AHC_DEV_Q_BASIC;
- } else {
- /* We can only have one opening */
- dev->maxtags = 0;
- dev->openings = 1 - dev->active;
- }
-}
-
-int
-ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
- int lun, u_int tag, role_t role, uint32_t status)
-{
- int chan;
- int maxchan;
- int targ;
- int maxtarg;
- int clun;
- int maxlun;
- int count;
-
- if (tag != SCB_LIST_NULL)
- return (0);
-
- chan = 0;
- if (channel != ALL_CHANNELS) {
- chan = channel - 'A';
- maxchan = chan + 1;
- } else {
- maxchan = (ahc->features & AHC_TWIN) ? 2 : 1;
- }
- targ = 0;
- if (target != CAM_TARGET_WILDCARD) {
- targ = target;
- maxtarg = targ + 1;
- } else {
- maxtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
- }
- clun = 0;
- if (lun != CAM_LUN_WILDCARD) {
- clun = lun;
- maxlun = clun + 1;
- } else {
- maxlun = 16;
- }
-
- count = 0;
- for (; chan < maxchan; chan++) {
- for (; targ < maxtarg; targ++) {
- for (; clun < maxlun; clun++) {
- struct ahc_linux_device *dev;
- struct ahc_busyq *busyq;
- struct ahc_cmd *acmd;
-
- dev = ahc_linux_get_device(ahc, chan,
- targ, clun,
- /*alloc*/FALSE);
- if (dev == NULL)
- continue;
-
- busyq = &dev->busyq;
- while ((acmd = TAILQ_FIRST(busyq)) != NULL) {
- Scsi_Cmnd *cmd;
-
- cmd = &acmd_scsi_cmd(acmd);
- TAILQ_REMOVE(busyq, acmd,
- acmd_links.tqe);
- count++;
- cmd->result = status << 16;
- ahc_linux_queue_cmd_complete(ahc, cmd);
- }
- }
- }
- }
-
- return (count);
-}
-
-/*
- * Sets the queue depth for each SCSI device hanging
- * off the input host adapter.
- */
-static void
-ahc_linux_select_queue_depth(struct Scsi_Host * host,
- Scsi_Device * scsi_devs)
-{
- Scsi_Device *device;
- struct ahc_softc *ahc;
- u_long flags;
- int scbnum;
-
- ahc = *((struct ahc_softc **)host->hostdata);
- ahc_lock(ahc, &flags);
- scbnum = 0;
- for (device = scsi_devs; device != NULL; device = device->next) {
- if (device->host == host) {
- ahc_linux_device_queue_depth(ahc, device);
- scbnum += device->queue_depth;
- }
- }
- ahc_unlock(ahc, &flags);
-}
-
-/*
- * Determines the queue depth for a given device.
- */
-static void
-ahc_linux_device_queue_depth(struct ahc_softc *ahc, Scsi_Device * device)
-{
- struct ahc_devinfo devinfo;
- struct ahc_initiator_tinfo *targ_info;
- struct ahc_tmode_tstate *tstate;
- uint8_t tags;
-
- ahc_compile_devinfo(&devinfo,
- device->channel == 0 ? ahc->our_id : ahc->our_id_b,
- device->id, device->lun,
- device->channel == 0 ? 'A' : 'B',
- ROLE_INITIATOR);
- targ_info = ahc_fetch_transinfo(ahc, devinfo.channel,
- devinfo.our_scsiid,
- devinfo.target, &tstate);
-
- tags = 0;
- if (device->tagged_supported != 0
- && (ahc->user_discenable & devinfo.target_mask) != 0) {
- if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
-
- printf("aic7xxx: WARNING, insufficient "
- "tag_info instances for installed "
- "controllers. Using defaults\n");
- printf("aic7xxx: Please update the "
- "aic7xxx_tag_info array in the "
- "aic7xxx.c source file.\n");
- tags = AHC_MAX_QUEUE;
- } else {
- adapter_tag_info_t *tag_info;
-
- tag_info = &aic7xxx_tag_info[ahc->unit];
- tags = tag_info->tag_commands[devinfo.target_offset];
- if (tags > AHC_MAX_QUEUE)
- tags = AHC_MAX_QUEUE;
- }
- }
- if (tags != 0) {
- device->queue_depth = tags;
- ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED);
- printf("scsi%d:%c:%d:%d: Tagged Queuing enabled. Depth %d\n",
- ahc->platform_data->host->host_no, device->channel + 'A',
- device->id, device->lun, tags);
- } else {
- /*
- * We allow the OS to queue 2 untagged transactions to
- * us at any time even though we can only execute them
- * serially on the controller/device. This should remove
- * some latency.
- */
- device->queue_depth = 2;
- }
-}
-
-/*
- * Queue an SCB to the controller.
- */
-int
-ahc_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
-{
- struct ahc_softc *ahc;
- struct ahc_linux_device *dev;
- u_long flags;
-
- ahc = *(struct ahc_softc **)cmd->host->hostdata;
-
- /*
- * Save the callback on completion function.
- */
- cmd->scsi_done = scsi_done;
-
- ahc_lock(ahc, &flags);
- dev = ahc_linux_get_device(ahc, cmd->channel, cmd->target,
- cmd->lun, /*alloc*/TRUE);
- if (dev == NULL) {
- ahc_unlock(ahc, &flags);
- printf("aic7xxx_linux_queue: Unable to allocate device!\n");
- return (-ENOMEM);
- }
- cmd->result = CAM_REQ_INPROG << 16;
- TAILQ_INSERT_TAIL(&dev->busyq, (struct ahc_cmd *)cmd, acmd_links.tqe);
- if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) {
- TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links);
- dev->flags |= AHC_DEV_ON_RUN_LIST;
- ahc_linux_run_device_queues(ahc);
- }
- ahc_unlock(ahc, &flags);
- return (0);
-}
-
-static void
-ahc_linux_run_device_queue(struct ahc_softc *ahc, struct ahc_linux_device *dev)
-{
- struct ahc_cmd *acmd;
- struct scsi_cmnd *cmd;
- struct scb *scb;
- struct hardware_scb *hscb;
- struct ahc_initiator_tinfo *tinfo;
- struct ahc_tmode_tstate *tstate;
- uint16_t mask;
-
- if ((dev->flags & AHC_DEV_ON_RUN_LIST) != 0)
- panic("running device on run list");
-
- while ((acmd = TAILQ_FIRST(&dev->busyq)) != NULL
- && dev->openings > 0 && dev->qfrozen == 0) {
-
- /*
- * Schedule us to run later. The only reason we are not
- * running is because the whole controller Q is frozen.
- */
- if (ahc->platform_data->qfrozen != 0) {
-
- TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq,
- dev, links);
- dev->flags |= AHC_DEV_ON_RUN_LIST;
- return;
- }
- /*
- * Get an scb to use.
- */
- if ((scb = ahc_get_scb(ahc)) == NULL) {
- TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq,
- dev, links);
- dev->flags |= AHC_DEV_ON_RUN_LIST;
- ahc->flags |= AHC_RESOURCE_SHORTAGE;
- return;
- }
- TAILQ_REMOVE(&dev->busyq, acmd, acmd_links.tqe);
- cmd = &acmd_scsi_cmd(acmd);
- scb->io_ctx = cmd;
- scb->platform_data->dev = dev;
- hscb = scb->hscb;
- cmd->host_scribble = (char *)scb;
-
- /*
- * Fill out basics of the HSCB.
- */
- hscb->control = 0;
- hscb->scsiid = BUILD_SCSIID(ahc, cmd);
- hscb->lun = cmd->lun;
- mask = SCB_GET_TARGET_MASK(ahc, scb);
- tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
- SCB_GET_OUR_ID(scb),
- SCB_GET_TARGET(ahc, scb), &tstate);
- hscb->scsirate = tinfo->scsirate;
- hscb->scsioffset = tinfo->curr.offset;
- if ((tstate->ultraenb & mask) != 0)
- hscb->control |= ULTRAENB;
-
- if ((ahc->user_discenable & mask) != 0)
- hscb->control |= DISCENB;
-
- if ((tstate->auto_negotiate & mask) != 0) {
- scb->flags |= SCB_AUTO_NEGOTIATE;
- scb->hscb->control |= MK_MESSAGE;
- }
-
- if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
- if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
- && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
- hscb->control |= MSG_ORDERED_TASK;
- dev->commands_since_idle_or_otag = 0;
- } else {
- hscb->control |= MSG_SIMPLE_TASK;
- }
- }
-
- hscb->cdb_len = cmd->cmd_len;
- if (hscb->cdb_len <= 12) {
- memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
- } else {
- memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
- scb->flags |= SCB_CDB32_PTR;
- }
-
- scb->platform_data->xfer_len = 0;
- ahc_set_residual(scb, 0);
- ahc_set_sense_residual(scb, 0);
- if (cmd->use_sg != 0) {
- struct ahc_dma_seg *sg;
- struct scatterlist *cur_seg;
- struct scatterlist *end_seg;
- int nseg;
-
- cur_seg = (struct scatterlist *)cmd->request_buffer;
- nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
- scsi_to_pci_dma_dir(cmd ->sc_data_direction));
- end_seg = cur_seg + nseg;
- /* Copy the segments into the SG list. */
- sg = scb->sg_list;
- /*
- * The sg_count may be larger than nseg if
- * a transfer crosses a 32bit page.
- */
- scb->sg_count = 0;
- while(cur_seg < end_seg) {
- bus_addr_t addr;
- bus_size_t len;
- int consumed;
-
- addr = sg_dma_address(cur_seg);
- len = sg_dma_len(cur_seg);
- consumed = ahc_linux_map_seg(ahc, scb,
- sg, addr, len);
- sg += consumed;
- scb->sg_count += consumed;
- cur_seg++;
- }
- sg--;
- sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
-
- /*
- * Reset the sg list pointer.
- */
- scb->hscb->sgptr =
- ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
-
- /*
- * Copy the first SG into the "current"
- * data pointer area.
- */
- scb->hscb->dataptr = scb->sg_list->addr;
- scb->hscb->datacnt = scb->sg_list->len;
- } else if (cmd->request_bufflen != 0) {
- struct ahc_dma_seg *sg;
- bus_addr_t addr;
-
- sg = scb->sg_list;
- addr = pci_map_single(ahc->dev_softc,
- cmd->request_buffer,
- cmd->request_bufflen,
- scsi_to_pci_dma_dir(cmd->sc_data_direction));
- scb->sg_count = 0;
- scb->sg_count = ahc_linux_map_seg(ahc, scb,
- sg, addr,
- cmd->request_bufflen);
- sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
-
- /*
- * Reset the sg list pointer.
- */
- scb->hscb->sgptr =
- ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
-
- /*
- * Copy the first SG into the "current"
- * data pointer area.
- */
- scb->hscb->dataptr = sg->addr;
- scb->hscb->datacnt = sg->len;
- } else {
- scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
- scb->hscb->dataptr = 0;
- scb->hscb->datacnt = 0;
- scb->sg_count = 0;
- }
-
- ahc_sync_sglist(ahc, scb, BUS_DMASYNC_PREWRITE);
- LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
- dev->openings--;
- dev->active++;
- dev->commands_issued++;
- if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
- dev->commands_since_idle_or_otag++;
-
- /*
- * We only allow one untagged transaction
- * per target in the initiator role unless
- * we are storing a full busy target *lun*
- * table in SCB space.
- */
- if ((scb->hscb->control & (TARGET_SCB|TAG_ENB)) == 0
- && (ahc->features & AHC_SCB_BTT) == 0) {
- struct scb_tailq *untagged_q;
- int target_offset;
-
- target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
- untagged_q = &(ahc->untagged_queues[target_offset]);
- TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
- scb->flags |= SCB_UNTAGGEDQ;
- if (TAILQ_FIRST(untagged_q) != scb)
- continue;
- }
- scb->flags |= SCB_ACTIVE;
- ahc_queue_scb(ahc, scb);
- }
-}
-
-/*
- * SCSI controller interrupt handler.
- */
-void
-ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
-{
- struct ahc_softc *ahc;
- struct ahc_cmd *acmd;
- u_long flags;
-
- ahc = (struct ahc_softc *) dev_id;
- ahc_lock(ahc, &flags);
- ahc_intr(ahc);
- /*
- * It would be nice to run the device queues from a
- * bottom half handler, but as there is no way to
- * dynamically register one, we'll have to postpone
- * that until we get integrated into the kernel.
- */
- ahc_linux_run_device_queues(ahc);
- acmd = TAILQ_FIRST(&ahc->platform_data->completeq);
- TAILQ_INIT(&ahc->platform_data->completeq);
- ahc_unlock(ahc, &flags);
- if (acmd != NULL)
- ahc_linux_run_complete_queue(ahc, acmd);
-}
-
-void
-ahc_platform_flushwork(struct ahc_softc *ahc)
-{
- struct ahc_cmd *acmd;
-
- acmd = TAILQ_FIRST(&ahc->platform_data->completeq);
- TAILQ_INIT(&ahc->platform_data->completeq);
- if (acmd != NULL)
- ahc_linux_run_complete_queue(ahc, acmd);
-}
-
-static struct ahc_linux_target*
-ahc_linux_alloc_target(struct ahc_softc *ahc, u_int channel, u_int target)
-{
- struct ahc_linux_target *targ;
- u_int target_offset;
-
- targ = malloc(sizeof(*targ), M_DEVBUG, M_NOWAIT);
- if (targ == NULL)
- return (NULL);
- memset(targ, 0, sizeof(*targ));
- targ->channel = channel;
- targ->target = target;
- target_offset = target;
- if (channel != 0)
- target_offset += 8;
- ahc->platform_data->targets[target_offset] = targ;
- return (targ);
-}
-
-static void
-ahc_linux_free_target(struct ahc_softc *ahc, struct ahc_linux_target *targ)
-{
- u_int target_offset;
-
- target_offset = targ->target;
- if (targ->channel != 0)
- target_offset += 8;
- ahc->platform_data->targets[target_offset] = NULL;
- free(targ, M_DEVBUF);
-}
-
-static struct ahc_linux_device*
-ahc_linux_alloc_device(struct ahc_softc *ahc,
- struct ahc_linux_target *targ, u_int lun)
-{
- struct ahc_linux_device *dev;
-
- dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT);
- if (dev == NULL)
- return (NULL);
- memset(dev, 0, sizeof(*dev));
- TAILQ_INIT(&dev->busyq);
- dev->flags = AHC_DEV_UNCONFIGURED;
- dev->lun = lun;
- dev->target = targ;
-
- /*
- * We start out life using untagged
- * transactions of which we allow one.
- */
- dev->openings = 1;
-
- /*
- * Set maxtags to 0. This will be changed if we
- * later determine that we are dealing with
- * a tagged queuing capable device.
- */
- dev->maxtags = 0;
-
- targ->refcount++;
- targ->devices[lun] = dev;
- return (dev);
-}
-
-static void
-ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
-{
- struct ahc_linux_target *targ;
-
- targ = dev->target;
- targ->devices[dev->lun] = NULL;
- free(dev, M_DEVBUF);
- targ->refcount--;
- if (targ->refcount == 0)
- ahc_linux_free_target(ahc, targ);
-}
-
-/*
- * Return a string describing the driver.
- */
-const char *
-ahc_linux_info(struct Scsi_Host *host)
-{
- static char buffer[512];
- char ahc_info[256];
- char *bp;
- struct ahc_softc *ahc;
-
- bp = &buffer[0];
- ahc = *(struct ahc_softc **)host->hostdata;
- memset(bp, 0, sizeof(buffer));
- strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
- strcat(bp, AIC7XXX_DRIVER_VERSION);
- strcat(bp, "\n");
- strcat(bp, " <");
- strcat(bp, ahc->description);
- strcat(bp, ">\n");
- strcat(bp, " ");
- ahc_controller_info(ahc, ahc_info);
- strcat(bp, ahc_info);
- strcat(bp, "\n");
-
- return (bp);
-}
-
-void
-ahc_send_async(struct ahc_softc *ahc, char channel,
- u_int target, u_int lun, ac_code code, void *arg)
-{
- switch (code) {
- case AC_TRANSFER_NEG:
- {
- char buf[80];
- struct ahc_linux_target *targ;
- struct info_str info;
- struct ahc_initiator_tinfo *tinfo;
- struct ahc_tmode_tstate *tstate;
- int target_offset;
-
- info.buffer = buf;
- info.length = sizeof(buf);
- info.offset = 0;
- info.pos = 0;
- tinfo = ahc_fetch_transinfo(ahc, channel,
- channel == 'A' ? ahc->our_id
- : ahc->our_id_b,
- target, &tstate);
-
- /*
- * Don't bother reporting results while
- * negotiations are still pending.
- */
- if (tinfo->curr.period != tinfo->goal.period
- || tinfo->curr.width != tinfo->goal.width
- || tinfo->curr.offset != tinfo->goal.offset
- || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
- if (bootverbose == 0)
- break;
-
- /*
- * Don't bother reporting results that
- * are identical to those last reported.
- */
- target_offset = target;
- if (channel == 'B')
- target_offset += 8;
- targ = ahc->platform_data->targets[target_offset];
- if (targ != NULL
- && tinfo->curr.period == targ->last_tinfo.period
- && tinfo->curr.width == targ->last_tinfo.width
- && tinfo->curr.offset == targ->last_tinfo.offset
- && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options)
- if (bootverbose == 0)
- break;
-
- targ->last_tinfo.period = tinfo->curr.period;
- targ->last_tinfo.width = tinfo->curr.width;
- targ->last_tinfo.offset = tinfo->curr.offset;
- targ->last_tinfo.ppr_options = tinfo->curr.ppr_options;
-
- printf("(%s:%c:", ahc_name(ahc), channel);
- if (target == CAM_TARGET_WILDCARD)
- printf("*): ");
- else
- printf("%d): ", target);
- ahc_format_transinfo(&info, &tinfo->curr);
- if (info.pos < info.length)
- *info.buffer = '\0';
- else
- buf[info.length - 1] = '\0';
- printf("%s", buf);
- break;
- }
- case AC_SENT_BDR:
- break;
- case AC_BUS_RESET:
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
- if (ahc->platform_data->host != NULL) {
- scsi_report_bus_reset(ahc->platform_data->host,
- channel - 'A');
- }
-#endif
- break;
- default:
- panic("ahc_send_async: Unexpected async event");
- }
-}
-
-/*
- * Calls the higher level scsi done function and frees the scb.
- */
-void
-ahc_done(struct ahc_softc *ahc, struct scb * scb)
-{
- Scsi_Cmnd *cmd;
- struct ahc_linux_device *dev;
-
- LIST_REMOVE(scb, pending_links);
- if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
- struct scb_tailq *untagged_q;
- int target_offset;
-
- target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
- untagged_q = &(ahc->untagged_queues[target_offset]);
- TAILQ_REMOVE(untagged_q, scb, links.tqe);
- ahc_run_untagged_queue(ahc, untagged_q);
- }
-
- if ((scb->flags & SCB_ACTIVE) == 0) {
- printf("SCB %d done'd twice\n", scb->hscb->tag);
- ahc_dump_card_state(ahc);
- panic("Stopping for safety");
- }
- cmd = scb->io_ctx;
- dev = scb->platform_data->dev;
- dev->active--;
- dev->openings++;
- ahc_linux_unmap_scb(ahc, scb);
- if (scb->flags & SCB_SENSE) {
- memcpy(cmd->sense_buffer, ahc_get_sense_buf(ahc, scb),
- MIN(sizeof(struct scsi_sense_data),
- sizeof(cmd->sense_buffer)));
- cmd->result |= (DRIVER_SENSE << 24);
- } else {
- /*
- * Guard against stale sense data.
- * The Linux mid-layer assumes that sense
- * was retrieved anytime the first byte of
- * the sense buffer looks "sane".
- */
- cmd->sense_buffer[0] = 0;
- }
- if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
- uint32_t amount_xferred;
-
- amount_xferred =
- ahc_get_transfer_length(scb) - ahc_get_residual(scb);
- if (amount_xferred < scb->io_ctx->underflow) {
- printf("Saw underflow (%ld of %ld bytes). "
- "Treated as error\n",
- ahc_get_residual(scb),
- ahc_get_transfer_length(scb));
- ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
- } else {
- ahc_set_transaction_status(scb, CAM_REQ_CMP);
- ahc_linux_sniff_command(ahc, cmd, scb);
- }
- } else if (ahc_get_transaction_status(scb) == DID_OK) {
- ahc_linux_handle_scsi_status(ahc, dev, scb);
- } else if (ahc_get_transaction_status(scb) == DID_NO_CONNECT) {
- /*
- * Should a selection timeout kill the device?
- * That depends on whether the selection timeout
- * is persistent. Since we have no guarantee that
- * the mid-layer will issue an inquiry for this device
- * again, we can't just kill it off.
- dev->flags |= AHC_DEV_UNCONFIGURED;
- */
- }
-
- if (dev->openings == 1
- && ahc_get_transaction_status(scb) == CAM_REQ_CMP
- && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
- dev->tag_success_count++;
- /*
- * Some devices deal with temporary internal resource
- * shortages by returning queue full. When the queue
- * full occurrs, we throttle back. Slowly try to get
- * back to our previous queue depth.
- */
- if ((dev->openings + dev->active) < dev->maxtags
- && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
- dev->tag_success_count = 0;
- dev->openings++;
- }
-
- if (dev->active == 0)
- dev->commands_since_idle_or_otag = 0;
-
- if (TAILQ_EMPTY(&dev->busyq)) {
- if ((dev->flags & AHC_DEV_UNCONFIGURED) != 0
- && dev->active == 0)
- ahc_linux_free_device(ahc, dev);
- } else if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) {
- TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links);
- dev->flags |= AHC_DEV_ON_RUN_LIST;
- }
-
- if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
- printf("Recovery SCB completes\n");
- up(&ahc->platform_data->eh_sem);
- }
-
- ahc_free_scb(ahc, scb);
- ahc_linux_queue_cmd_complete(ahc, cmd);
-}
-
-static void
-ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
- struct ahc_linux_device *dev, struct scb *scb)
-{
- /*
- * We don't currently trust the mid-layer to
- * properly deal with queue full or busy. So,
- * when one occurs, we tell the mid-layer to
- * unconditionally requeue the command to us
- * so that we can retry it ourselves. We also
- * implement our own throttling mechanism so
- * we don't clobber the device with too many
- * commands.
- */
- switch (ahc_get_scsi_status(scb)) {
- default:
- break;
- case SCSI_STATUS_QUEUE_FULL:
- {
- /*
- * By the time the core driver has returned this
- * command, all other commands that were queued
- * to us but not the device have been returned.
- * This ensures that dev->active is equal to
- * the number of commands actually queued to
- * the device.
- */
- dev->tag_success_count = 0;
- if (dev->active != 0) {
- /*
- * Drop our opening count to the number
- * of commands currently outstanding.
- */
- dev->openings = 0;
-/*
- ahc_print_path(ahc, scb);
- printf("Dropping tag count to %d\n", dev->active);
- */
- if (dev->active == dev->tags_on_last_queuefull) {
-
- dev->last_queuefull_same_count++;
- /*
- * If we repeatedly see a queue full
- * at the same queue depth, this
- * device has a fixed number of tag
- * slots. Lock in this tag depth
- * so we stop seeing queue fulls from
- * this device.
- */
- if (dev->last_queuefull_same_count
- == AHC_LOCK_TAGS_COUNT) {
- dev->maxtags = dev->active;
- ahc_print_path(ahc, scb);
- printf("Locking max tag count at %d\n",
- dev->active);
- }
- } else {
- dev->tags_on_last_queuefull = dev->active;
- dev->last_queuefull_same_count = 0;
- }
- ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
- ahc_set_scsi_status(scb, SCSI_STATUS_OK);
- break;
- }
- /*
- * Drop down to a single opening, and treat this
- * as if the target return BUSY SCSI status.
- */
- dev->openings = 1;
- /* FALLTHROUGH */
- }
- case SCSI_STATUS_BUSY:
- /*
- * XXX Set a timer and handle ourselves????
- * For now we pray that the mid-layer does something
- * sane for devices that are busy.
- */
- ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
- break;
- }
-}
-
-static void
-ahc_linux_filter_command(struct ahc_softc *ahc, Scsi_Cmnd *cmd, struct scb *scb)
-{
- switch (cmd->cmnd[0]) {
- case INQUIRY:
- {
- struct ahc_devinfo devinfo;
- struct scsi_inquiry *inq;
- struct scsi_inquiry_data *sid;
- struct ahc_initiator_tinfo *targ_info;
- struct ahc_tmode_tstate *tstate;
- struct ahc_syncrate *syncrate;
- struct ahc_linux_device *dev;
- u_int scsiid;
- u_int maxsync;
- int transferred_len;
- int minlen;
- u_int width;
- u_int period;
- u_int offset;
- u_int ppr_options;
-
- /*
- * Validate the command. We only want to filter
- * standard inquiry commands, not those querying
- * Vital Product Data.
- */
- inq = (struct scsi_inquiry *)cmd->cmnd;
- if ((inq->byte2 & SI_EVPD) != 0
- || inq->page_code != 0)
- break;
-
- if (cmd->use_sg != 0) {
- printf("%s: SG Inquiry response ignored\n",
- ahc_name(ahc));
- break;
- }
- transferred_len = ahc_get_transfer_length(scb)
- - ahc_get_residual(scb);
- sid = (struct scsi_inquiry_data *)cmd->request_buffer;
-
- /*
- * Determine if this lun actually exists. If so,
- * hold on to its corresponding device structure.
- * If not, make sure we release the device and
- * don't bother processing the rest of this inquiry
- * command.
- */
- dev = ahc_linux_get_device(ahc, cmd->channel,
- cmd->target, cmd->lun,
- /*alloc*/FALSE);
- if (transferred_len >= 1
- && SID_QUAL(sid) == SID_QUAL_LU_CONNECTED) {
-
- dev->flags &= ~AHC_DEV_UNCONFIGURED;
- } else {
- dev->flags |= AHC_DEV_UNCONFIGURED;
- break;
- }
-
- /*
- * Update our notion of this device's transfer
- * negotiation capabilities.
- */
- scsiid = BUILD_SCSIID(ahc, cmd);
- ahc_compile_devinfo(&devinfo, SCSIID_OUR_ID(scsiid),
- cmd->target, cmd->lun,
- SCSIID_CHANNEL(ahc, scsiid),
- ROLE_INITIATOR);
- targ_info = ahc_fetch_transinfo(ahc, devinfo.channel,
- devinfo.our_scsiid,
- devinfo.target, &tstate);
- width = targ_info->user.width;
- period = targ_info->user.period;
- offset = targ_info->user.offset;
- ppr_options = targ_info->user.ppr_options;
- minlen = offsetof(struct scsi_inquiry_data, version) + 1;
- if (transferred_len >= minlen) {
- targ_info->curr.protocol_version = SID_ANSI_REV(sid);
-
- /*
- * Only attempt SPI3 once we've verified that
- * the device claims to support SPI3 features.
- */
- if (targ_info->curr.protocol_version < SCSI_REV_2)
- targ_info->curr.transport_version =
- SID_ANSI_REV(sid);
- else
- targ_info->curr.transport_version =
- SCSI_REV_2;
- }
-
- minlen = offsetof(struct scsi_inquiry_data, flags) + 1;
- if (transferred_len >= minlen
- && (sid->additional_length + 4) >= minlen) {
- if ((sid->flags & SID_WBus16) == 0)
- width = MSG_EXT_WDTR_BUS_8_BIT;
- if ((sid->flags & SID_Sync) == 0) {
- period = 0;
- offset = 0;
- ppr_options = 0;
- }
- } else {
- /* Keep current settings */
- break;
- }
- minlen = offsetof(struct scsi_inquiry_data, spi3data) + 1;
- /*
- * This is a kludge to deal with inquiry requests that
- * are not large enough for us to pull the spi3 bits.
- * In this case, we assume that a device that tells us
- * they can provide inquiry data that spans the SPI3
- * bits and says its SCSI3 can handle a PPR request.
- * If the inquiry request has sufficient buffer space to
- * cover these bits, we check them to see if any ppr options
- * are available.
- */
- if ((sid->additional_length + 4) >= minlen) {
- if (transferred_len >= minlen
- && (sid->spi3data & SID_SPI_CLOCK_DT) == 0)
- ppr_options = 0;
-
- if (targ_info->curr.protocol_version > SCSI_REV_2)
- targ_info->curr.transport_version = 3;
- else
- ppr_options = 0;
- } else {
- ppr_options = 0;
- }
- ahc_validate_width(ahc, /*tinfo limit*/NULL, &width,
- ROLE_UNKNOWN);
- if ((ahc->features & AHC_ULTRA2) != 0)
- maxsync = AHC_SYNCRATE_DT;
- else if ((ahc->features & AHC_ULTRA) != 0)
- maxsync = AHC_SYNCRATE_ULTRA;
- else
- maxsync = AHC_SYNCRATE_FAST;
-
- syncrate = ahc_find_syncrate(ahc, &period,
- &ppr_options, maxsync);
- ahc_validate_offset(ahc, /*tinfo limit*/NULL, syncrate,
- &offset, width, ROLE_UNKNOWN);
- if (offset == 0 || period == 0) {
- period = 0;
- offset = 0;
- ppr_options = 0;
- }
- /* Apply our filtered user settings. */
- ahc_set_width(ahc, &devinfo, width,
- AHC_TRANS_GOAL, /*paused*/FALSE);
- ahc_set_syncrate(ahc, &devinfo, syncrate, period,
- offset, ppr_options, AHC_TRANS_GOAL,
- /*paused*/FALSE);
- break;
- }
- default:
- panic("ahc_linux_filter_command: Unexpected Command type %x\n",
- cmd->cmnd[0]);
- break;
- }
-}
-
-static void
-ahc_linux_sem_timeout(u_long arg)
-{
- struct semaphore *sem;
-
- sem = (struct semaphore *)arg;
- up(sem);
-}
-
-static void
-ahc_linux_freeze_sim_queue(struct ahc_softc *ahc)
-{
- ahc->platform_data->qfrozen++;
- if (ahc->platform_data->qfrozen == 1)
- scsi_block_requests(ahc->platform_data->host);
-}
-
-static void
-ahc_linux_release_sim_queue(u_long arg)
-{
- struct ahc_softc *ahc;
- u_long s;
- int unblock_reqs;
-
- ahc = (struct ahc_softc *)arg;
- unblock_reqs = 0;
- ahc_lock(ahc, &s);
- if (ahc->platform_data->qfrozen > 0)
- ahc->platform_data->qfrozen--;
- if (ahc->platform_data->qfrozen == 0) {
- unblock_reqs = 1;
- ahc_linux_run_device_queues(ahc);
- }
- ahc_unlock(ahc, &s);
- /*
- * There is still a race here. The mid-layer
- * should keep its own freeze count and use
- * a bottom half handler to run the queues
- * so we can unblock with our own lock held.
- */
- if (unblock_reqs)
- scsi_unblock_requests(ahc->platform_data->host);
-}
-
-static int
-ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag)
-{
- struct ahc_softc *ahc;
- struct ahc_cmd *acmd;
- struct ahc_cmd *list_acmd;
- struct ahc_linux_device *dev;
- struct scb *pending_scb;
- u_long s;
- u_int saved_scbptr;
- u_int active_scb_index;
- u_int last_phase;
- int retval;
- int paused;
- int wait;
- int disconnected;
-
- paused = FALSE;
- wait = FALSE;
- ahc = *(struct ahc_softc **)cmd->host->hostdata;
- acmd = (struct ahc_cmd *)cmd;
-
- printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun,
- flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
-
- /*
- * It is a bug that the upper layer takes
- * this lock just prior to calling us.
- */
- spin_unlock_irq(&io_request_lock);
-
- ahc_lock(ahc, &s);
-
- /*
- * First determine if we currently own this command.
- * Start by searching the device queue. If not found
- * there, check the pending_scb list. If not found
- * at all, and the system wanted us to just abort the
- * command return success.
- */
- dev = ahc_linux_get_device(ahc, cmd->channel, cmd->target,
- cmd->lun, /*alloc*/FALSE);
-
- if (dev == NULL) {
- /*
- * No target device for this command exists,
- * so we must not still own the command.
- */
- printf("%s:%d:%d:%d: Is not an active device\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
- retval = SUCCESS;
- goto no_cmd;
- }
-
- TAILQ_FOREACH(list_acmd, &dev->busyq, acmd_links.tqe) {
- if (list_acmd == acmd)
- break;
- }
-
- if (list_acmd != NULL) {
- printf("%s:%d:%d:%d: Command found on device queue\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
- if (flag == SCB_ABORT) {
- TAILQ_REMOVE(&dev->busyq, list_acmd, acmd_links.tqe);
- cmd->result = DID_ABORT << 16;
- ahc_linux_queue_cmd_complete(ahc, cmd);
- retval = SUCCESS;
- goto done;
- }
- }
-
- /*
- * See if we can find a matching cmd in the pending list.
- */
- LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
- if (pending_scb->io_ctx == cmd)
- break;
- }
-
- if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
-
- /* Any SCB for this device will do for a target reset */
- LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
- if (ahc_match_scb(ahc, pending_scb, cmd->target,
- cmd->channel, CAM_LUN_WILDCARD,
- SCB_LIST_NULL, ROLE_INITIATOR) == 0)
- break;
- }
- }
-
- if (pending_scb == NULL) {
- printf("%s:%d:%d:%d: Command not found\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
- goto no_cmd;
- }
-
- if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
- /*
- * We can't queue two recovery actions using the same SCB
- */
- retval = FAILED;
- goto done;
- }
-
- /*
- * Ensure that the card doesn't do anything
- * behind our back. Also make sure that we
- * didn't "just" miss an interrupt that would
- * affect this cmd.
- */
- ahc->flags |= AHC_ALL_INTERRUPTS;
- do {
- ahc_intr(ahc);
- ahc_pause(ahc);
- ahc_clear_critical_section(ahc);
- } while (ahc_inb(ahc, INTSTAT) & INT_PEND);
- ahc->flags &= ~AHC_ALL_INTERRUPTS;
- paused = TRUE;
-
- ahc_dump_card_state(ahc);
-
- if ((pending_scb->flags & SCB_ACTIVE) == 0) {
- printf("%s:%d:%d:%d: Command already completed\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
- goto no_cmd;
- }
-
- disconnected = TRUE;
- if (flag == SCB_ABORT) {
- if (ahc_search_qinfifo(ahc, cmd->target, cmd->channel + 'A',
- cmd->lun, pending_scb->hscb->tag,
- ROLE_INITIATOR, CAM_REQ_ABORTED,
- SEARCH_COMPLETE) > 0) {
- printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
- ahc_name(ahc), cmd->channel, cmd->target,
- cmd->lun);
- retval = SUCCESS;
- goto done;
- }
- } else if (ahc_search_qinfifo(ahc, cmd->target, cmd->channel + 'A',
- cmd->lun, pending_scb->hscb->tag,
- ROLE_INITIATOR, /*status*/0,
- SEARCH_COUNT) > 0) {
- disconnected = FALSE;
- }
-
- /*
- * At this point, pending_scb is the scb associated with the
- * passed in command. That command is currently active on the
- * bus, is in the disconnected state, or we're hoping to find
- * a command for the same target active on the bus to abuse to
- * send a BDR. Queue the appropriate message based on which of
- * these states we are in.
- */
- last_phase = ahc_inb(ahc, LASTPHASE);
- saved_scbptr = ahc_inb(ahc, SCBPTR);
- active_scb_index = ahc_inb(ahc, SCB_TAG);
- if (last_phase != P_BUSFREE
- && (pending_scb->hscb->tag == active_scb_index
- || (flag == SCB_DEVICE_RESET
- && SCSIID_TARGET(ahc, ahc_inb(ahc, SAVED_SCSIID)) == cmd->target))) {
-
- /*
- * We're active on the bus, so assert ATN
- * and hope that the target responds.
- */
- pending_scb = ahc_lookup_scb(ahc, active_scb_index);
- pending_scb->flags |= SCB_RECOVERY_SCB|flag;
- ahc_outb(ahc, MSG_OUT, HOST_MSG);
- ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
- printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
- wait = TRUE;
- } else if (disconnected) {
-
- /*
- * Actually re-queue this SCB in an attempt
- * to select the device before it reconnects.
- * In either case (selection or reselection),
- * we will now issue the approprate message
- * to the timed-out device.
- *
- * Set the MK_MESSAGE control bit indicating
- * that we desire to send a message. We
- * also set the disconnected flag since
- * in the paging case there is no guarantee
- * that our SCB control byte matches the
- * version on the card. We don't want the
- * sequencer to abort the command thinking
- * an unsolicited reselection occurred.
- */
- pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
- pending_scb->flags |= SCB_RECOVERY_SCB|flag;
-
- /*
- * Remove any cached copy of this SCB in the
- * disconnected list in preparation for the
- * queuing of our abort SCB. We use the
- * same element in the SCB, SCB_NEXT, for
- * both the qinfifo and the disconnected list.
- */
- ahc_search_disc_list(ahc, cmd->target, cmd->channel + 'A',
- cmd->lun, pending_scb->hscb->tag,
- /*stop_on_first*/TRUE,
- /*remove*/TRUE,
- /*save_state*/FALSE);
-
- /*
- * In the non-paging case, the sequencer will
- * never re-reference the in-core SCB.
- * To make sure we are notified during
- * reslection, set the MK_MESSAGE flag in
- * the card's copy of the SCB.
- */
- if ((ahc->flags & AHC_PAGESCBS) == 0) {
- ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
- ahc_outb(ahc, SCB_CONTROL,
- ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
- }
-
- /*
- * Clear out any entries in the QINFIFO first
- * so we are the next SCB for this target
- * to run.
- */
- ahc_search_qinfifo(ahc, cmd->target, cmd->channel + 'A',
- cmd->lun, SCB_LIST_NULL, ROLE_INITIATOR,
- CAM_REQUEUE_REQ, SEARCH_COMPLETE);
- ahc_print_path(ahc, pending_scb);
- printf("Queuing a recovery SCB\n");
- ahc_qinfifo_requeue_tail(ahc, pending_scb);
- ahc_outb(ahc, SCBPTR, saved_scbptr);
- printf("%s:%d:%d:%d: Device is disconnected, re-queuing SCB\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
- wait = TRUE;
- } else {
- printf("%s:%d:%d:%d: Unable to deliver message\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
- retval = FAILED;
- goto done;
- }
-
-no_cmd:
- /*
- * Our assumption is that if we don't have the command, no
- * recovery action was required, so we return success. Again,
- * the semantics of the mid-layer recovery engine are not
- * well defined, so this may change in time.
- */
- retval = SUCCESS;
-done:
- if (paused)
- ahc_unpause(ahc);
- if (wait) {
- struct timer_list timer;
- int ret;
-
- ahc_unlock(ahc, &s);
- init_timer(&timer);
- timer.data = (u_long)&ahc->platform_data->eh_sem;
- timer.expires = jiffies + (5 * HZ);
- timer.function = ahc_linux_sem_timeout;
- add_timer(&timer);
- printf("Recovery code sleeping\n");
- down(&ahc->platform_data->eh_sem);
- printf("Recovery code awake\n");
- ret = del_timer(&timer);
- if (ret == 0) {
- printf("Timer Expired\n");
- retval = FAILED;
- }
- ahc_lock(ahc, &s);
- }
- ahc_linux_run_device_queues(ahc);
- acmd = TAILQ_FIRST(&ahc->platform_data->completeq);
- TAILQ_INIT(&ahc->platform_data->completeq);
- ahc_unlock(ahc, &s);
- if (acmd != NULL)
- ahc_linux_run_complete_queue(ahc, acmd);
- spin_lock_irq(&io_request_lock);
- return (retval);
-}
-
-/*
- * Abort the current SCSI command(s).
- */
-int
-ahc_linux_abort(Scsi_Cmnd *cmd)
-{
- int error;
-
- error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
- if (error != 0)
- printf("aic7xxx_abort returns 0x%x\n", error);
- return (error);
-}
-
-/*
- * Attempt to send a target reset message to the device that timed out.
- */
-int
-ahc_linux_dev_reset(Scsi_Cmnd *cmd)
-{
- int error;
-
- error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
- if (error != 0)
- printf("aic7xxx_dev_reset returns 0x%x\n", error);
- return (error);
-}
-
-/*
- * Reset the SCSI bus.
- */
-int
-ahc_linux_bus_reset(Scsi_Cmnd *cmd)
-{
- struct ahc_softc *ahc;
- struct ahc_cmd *acmd;
- u_long s;
- int found;
-
- /*
- * It is a bug that the upper layer takes
- * this lock just prior to calling us.
- */
- spin_unlock_irq(&io_request_lock);
-
- ahc = *(struct ahc_softc **)cmd->host->hostdata;
- ahc_lock(ahc, &s);
- found = ahc_reset_channel(ahc, cmd->channel + 'A',
- /*initiate reset*/TRUE);
- acmd = TAILQ_FIRST(&ahc->platform_data->completeq);
- TAILQ_INIT(&ahc->platform_data->completeq);
- ahc_unlock(ahc, &s);
- if (bootverbose)
- printf("%s: SCSI bus reset delivered. "
- "%d SCBs aborted.\n", ahc_name(ahc), found);
-
- if (acmd != NULL)
- ahc_linux_run_complete_queue(ahc, acmd);
-
- spin_lock_irq(&io_request_lock);
- return SUCCESS;
-}
-
-/*
- * Return the disk geometry for the given SCSI device.
- */
-int
-ahc_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
-{
- int heads;
- int sectors;
- int cylinders;
- int ret;
- int extended;
- struct ahc_softc *ahc;
- struct buffer_head *bh;
-
- ahc = *((struct ahc_softc **)disk->device->host->hostdata);
- bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, block_size(dev));
-
- if (bh) {
- ret = scsi_partsize(bh, disk->capacity,
- &geom[2], &geom[0], &geom[1]);
- brelse(bh);
- if (ret != -1)
- return (ret);
- }
- heads = 64;
- sectors = 32;
- cylinders = disk->capacity / (heads * sectors);
-
- if (aic7xxx_extended != 0)
- extended = 1;
- else if (disk->device->channel == 0)
- extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
- else
- extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
- if (extended && cylinders >= 1024) {
- heads = 255;
- sectors = 63;
- cylinders = disk->capacity / (heads * sectors);
- }
- geom[0] = heads;
- geom[1] = sectors;
- geom[2] = cylinders;
- return (0);
-}
-
-/*
- * Free the passed in Scsi_Host memory structures prior to unloading the
- * module.
- */
-int
-ahc_linux_release(struct Scsi_Host * host)
-{
- struct ahc_softc *ahc;
-
- if (host != NULL) {
-
- ahc = *(struct ahc_softc **)host->hostdata;
- ahc_free(ahc);
- }
- if (TAILQ_EMPTY(&ahc_tailq)) {
- unregister_reboot_notifier(&ahc_linux_notifier);
-#ifdef CONFIG_PCI
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
- pci_unregister_driver(&aic7xxx_pci_driver);
-#endif
-#endif
- }
- return (0);
-}
-
-void
-ahc_platform_dump_card_state(struct ahc_softc *ahc)
-{
- struct ahc_linux_device *dev;
- int channel;
- int maxchannel;
- int target;
- int maxtarget;
- int lun;
- int i;
-
- maxchannel = (ahc->features & AHC_TWIN) ? 1 : 0;
- maxtarget = (ahc->features & AHC_WIDE) ? 15 : 7;
- for (channel = 0; channel <= maxchannel; channel++) {
- for (target = 0; target <=maxtarget; target++) {
- for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
- struct ahc_cmd *acmd;
-
- dev = ahc_linux_get_device(ahc, channel, target,
- lun, /*alloc*/FALSE);
- if (dev == NULL)
- continue;
-
- printf("DevQ(%d:%d:%d): ",
- channel, target, lun);
- i = 0;
- TAILQ_FOREACH(acmd, &dev->busyq,
- acmd_links.tqe) {
- if (i++ > 256)
- break;
- }
- printf("%d waiting\n", i);
- }
- }
- }
-}
-
-#if defined(MODULE) || LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
-static Scsi_Host_Template driver_template = AIC7XXX;
-Scsi_Host_Template *aic7xxx_driver_template = &driver_template;
-#include "../scsi_module.c"
-#endif
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)