patch-2.4.19 linux-2.4.19/drivers/scsi/aic7xxx/aic7xxx_osm.c
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- Lines: 3039
- Date:
Fri Aug 2 17:39:44 2002
- Orig file:
linux-2.4.18/drivers/scsi/aic7xxx/aic7xxx_osm.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -urN linux-2.4.18/drivers/scsi/aic7xxx/aic7xxx_osm.c linux-2.4.19/drivers/scsi/aic7xxx/aic7xxx_osm.c
@@ -0,0 +1,3038 @@
+/*
+ * Adaptec AIC7xxx device driver for Linux.
+ *
+ * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#103 $
+ *
+ * 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
+ *
+ */
+
+/*
+ * This is the only file where module.h should
+ * embed module global version info.
+ */
+#define AHC_MODVERSION_FILE
+
+#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> /* For block_size() */
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,0)
+/*
+ * Lock protecting manipulation of the ahc softc list.
+ */
+spinlock_t ahc_list_spinlock;
+#endif
+
+/*
+ * 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 :)
+ */
+#ifndef CONFIG_AIC7XXX_PROBE_EISA_VL
+#define CONFIG_AIC7XXX_PROBE_EISA_VL n
+#endif
+#if CONFIG_AIC7XXX_PROBE_EISA_VL == n
+static int aic7xxx_no_probe = 1;
+#else
+static int aic7xxx_no_probe;
+#endif
+
+/*
+ * 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 void ahc_linux_dev_timed_unfreeze(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 u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
+ struct ahc_devinfo *devinfo);
+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 void ahc_runq_tasklet(unsigned long data);
+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 struct ahc_linux_device *
+ ahc_linux_next_device_to_run(struct ahc_softc *ahc);
+static __inline void ahc_linux_run_device_queues(struct ahc_softc *ahc);
+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 struct ahc_linux_device *
+ahc_linux_next_device_to_run(struct ahc_softc *ahc)
+{
+
+ if ((ahc->flags & AHC_RESOURCE_SHORTAGE) != 0
+ || ahc->platform_data->qfrozen != 0)
+ return (NULL);
+ return (TAILQ_FIRST(&ahc->platform_data->device_runq));
+}
+
+static __inline void
+ahc_linux_run_device_queues(struct ahc_softc *ahc)
+{
+ struct ahc_linux_device *dev;
+
+ while ((dev = ahc_linux_next_device_to_run(ahc)) != 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) {
+ pci_unmap_single(ahc->dev_softc,
+ scb->platform_data->buf_busaddr,
+ 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);
+}
+
+/**************************** Tasklet Handler *********************************/
+
+static void
+ahc_runq_tasklet(unsigned long data)
+{
+ struct ahc_softc* ahc;
+ struct ahc_linux_device *dev;
+ u_long flags;
+
+ ahc = (struct ahc_softc *)data;
+ ahc_lock(ahc, &flags);
+ while ((dev = ahc_linux_next_device_to_run(ahc)) != NULL) {
+
+ TAILQ_REMOVE(&ahc->platform_data->device_runq, dev, links);
+ dev->flags &= ~AHC_DEV_ON_RUN_LIST;
+ ahc_linux_check_device_queue(ahc, dev);
+ /* Yeild to our interrupt handler */
+ ahc_unlock(ahc, &flags);
+ ahc_lock(ahc, &flags);
+ }
+ ahc_unlock(ahc, &flags);
+}
+
+/************************ 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 != NULL) {
+#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 != NULL) {
+#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;
+ }
+ }
+ 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;
+
+ /*
+ * It is a bug that the upper layer takes
+ * this lock just prior to calling us.
+ */
+ spin_unlock_irq(&io_request_lock);
+
+ /*
+ * 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
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,7)
+ /*
+ * We can only map 16MB per-SG
+ * so create a sector limit of
+ * "16MB" in 2K sectors.
+ */
+ template->max_sectors = 8192;
+#endif
+
+ /*
+ * Initialize our softc list lock prior to
+ * probing for any adapters.
+ */
+ ahc_list_lockinit();
+
+#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.
+ */
+ spin_lock_irq(&io_request_lock);
+ 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->irq = AHC_LINUX_NOIRQ;
+ 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
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ tasklet_init(&ahc->platform_data->runq_tasklet, ahc_runq_tasklet,
+ (unsigned long)ahc);
+#endif
+ ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
+ ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
+ if (TAILQ_EMPTY(&ahc_tailq))
+ register_reboot_notifier(&ahc_linux_notifier);
+ return (0);
+}
+
+void
+ahc_platform_free(struct ahc_softc *ahc)
+{
+ if (ahc->platform_data != NULL) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ tasklet_kill(&ahc->platform_data->runq_tasklet);
+#endif
+ if (ahc->platform_data->host != NULL)
+ scsi_unregister(ahc->platform_data->host);
+ if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
+ 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);
+ }
+ 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
+ }
+}
+
+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) {
+ u_int usertags;
+
+ usertags = ahc_linux_user_tagdepth(ahc, devinfo);
+ if (!was_queuing) {
+ /*
+ * Start out agressively and allow our
+ * dynamic queue depth algorithm to take
+ * care of the rest.
+ */
+ dev->maxtags = usertags;
+ 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 = AHC_NUM_LUNS;
+ }
+
+ 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);
+}
+
+static u_int
+ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
+{
+ static int warned_user;
+ u_int tags;
+
+ tags = 0;
+ if ((ahc->user_discenable & devinfo->target_mask) != 0) {
+ if (warned_user == 0
+ && 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;
+ warned_user++;
+ } 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;
+ }
+ }
+ return (tags);
+}
+
+/*
+ * 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;
+ u_int 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);
+ tags = ahc_linux_user_tagdepth(ahc, &devinfo);
+ if (tags != 0
+ && device->tagged_supported != 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, devinfo.channel,
+ devinfo.target, devinfo.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);
+ scb->sg_count = 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.
+ */
+ 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->platform_data->buf_busaddr = addr;
+ 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;
+ struct ahc_linux_device *next_dev;
+
+ ahc = (struct ahc_softc *) dev_id;
+ ahc_lock(ahc, &flags);
+ ahc_intr(ahc);
+ acmd = TAILQ_FIRST(&ahc->platform_data->completeq);
+ TAILQ_INIT(&ahc->platform_data->completeq);
+ next_dev = ahc_linux_next_device_to_run(ahc);
+ ahc_unlock(ahc, &flags);
+ if (next_dev) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ tasklet_schedule(&ahc->platform_data->runq_tasklet);
+#else
+ ahc_runq_tasklet((unsigned long)ahc);
+#endif
+ }
+ 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;
+ targ->ahc = ahc;
+ 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));
+ init_timer(&dev->timer);
+ 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;
+
+ del_timer(&dev->timer);
+ 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)
+ break;
+ if (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:
+ {
+ /*
+ * Set a short timer to defer sending commands for
+ * a bit since Linux will not delay in this case.
+ */
+ if ((dev->flags & AHC_DEV_TIMER_ACTIVE) != 0) {
+ printf("%s:%c:%d: Device Timer still active during "
+ "busy processing\n", ahc_name(ahc),
+ dev->target->channel, dev->target->target);
+ break;
+ }
+ dev->flags |= AHC_DEV_TIMER_ACTIVE;
+ dev->qfrozen++;
+ init_timer(&dev->timer);
+ dev->timer.data = (u_long)dev;
+ dev->timer.expires = jiffies + (HZ/2);
+ dev->timer.function = ahc_linux_dev_timed_unfreeze;
+ add_timer(&dev->timer);
+ 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 *tinfo;
+ struct ahc_transinfo *user;
+ struct ahc_transinfo *goal;
+ struct ahc_transinfo *curr;
+ 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);
+ tinfo = ahc_fetch_transinfo(ahc, devinfo.channel,
+ devinfo.our_scsiid,
+ devinfo.target, &tstate);
+ user = &tinfo->user;
+ goal = &tinfo->goal;
+ curr = &tinfo->curr;
+ width = user->width;
+ period = user->period;
+ offset = user->offset;
+ ppr_options = user->ppr_options;
+ minlen = offsetof(struct scsi_inquiry_data, version) + 1;
+ if (transferred_len >= minlen) {
+ curr->protocol_version = SID_ANSI_REV(sid);
+
+ /*
+ * Only attempt SPI3 once we've verified that
+ * the device claims to support SPI3 features.
+ */
+ if (curr->protocol_version < SCSI_REV_2)
+ curr->transport_version = SID_ANSI_REV(sid);
+ else
+ 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 spi3/4 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 SPI3 bits, we honor them regardless of reported
+ * SCSI REV. We also allow any device that has had its
+ * goal ppr_options set to allow DT speeds to keep that
+ * option if a short inquiry occurs that would fail the
+ * normal tests outlined above.
+ */
+ if ((sid->additional_length + 4) >= minlen) {
+ if (transferred_len >= minlen) {
+ if ((sid->spi3data & SID_SPI_CLOCK_DT) == 0)
+ ppr_options = 0;
+ } else if ((goal->ppr_options & MSG_EXT_PPR_DT_REQ)== 0)
+ ppr_options = 0;
+
+ if (curr->protocol_version > SCSI_REV_2)
+ curr->transport_version = 3;
+ } 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_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);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ tasklet_schedule(&ahc->platform_data->runq_tasklet);
+#else
+ ahc_runq_tasklet((unsigned long)ahc);
+#endif
+ }
+}
+
+static void
+ahc_linux_dev_timed_unfreeze(u_long arg)
+{
+ struct ahc_linux_device *dev;
+ struct ahc_softc *ahc;
+ u_long s;
+
+ dev = (struct ahc_linux_device *)arg;
+ ahc = dev->target->ahc;
+ ahc_lock(ahc, &s);
+ dev->flags &= ~AHC_DEV_TIMER_ACTIVE;
+ if (dev->qfrozen > 0)
+ dev->qfrozen--;
+ if (dev->qfrozen == 0
+ && (dev->flags & AHC_DEV_ON_RUN_LIST) == 0)
+ ahc_linux_run_device_queue(ahc, dev);
+ ahc_unlock(ahc, &s);
+}
+
+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;
+ }
+ }
+
+ if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
+ && ahc_search_untagged_queues(ahc, cmd, cmd->target,
+ cmd->channel + 'A', cmd->lun,
+ CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
+ printf("%s:%d:%d:%d: Command found on untagged queue\n",
+ ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
+ 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 + 'A', 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 and that no selections have occurred
+ * that have not been serviced. Also make sure that we
+ * didn't "just" miss an interrupt that would
+ * affect this cmd.
+ */
+ ahc->flags |= AHC_ALL_INTERRUPTS;
+ do {
+ if (paused)
+ ahc_unpause(ahc);
+ ahc_intr(ahc);
+ ahc_pause(ahc);
+ paused = TRUE;
+ ahc_outb(ahc, SCSISEQ, ahc_inb(ahc, SCSISEQ) & ~ENSELO);
+ ahc_clear_critical_section(ahc);
+ } while ((ahc_inb(ahc, INTSTAT) & INT_PEND) != 0
+ || (ahc_inb(ahc, SSTAT0) & (SELDO|SELINGO)));
+ ahc->flags &= ~AHC_ALL_INTERRUPTS;
+
+ 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;
+ }
+
+ if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & IDENTIFY_SEEN) != 0) {
+ struct scb *bus_scb;
+
+ bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
+ if (bus_scb == pending_scb)
+ disconnected = FALSE;
+ else if (flag != SCB_ABORT
+ && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
+ && ahc_inb(ahc, SAVED_LUN) == pending_scb->hscb->lun)
+ 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);
+ }
+ 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);
+ ahc_runq_tasklet((unsigned long)ahc);
+ 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);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,17)
+ bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, block_size(dev));
+#else
+ bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, 1024);
+#endif
+
+ 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;
+ u_long l;
+
+ ahc_list_lock(&l);
+ if (host != NULL) {
+
+ /*
+ * We should be able to just perform
+ * the free directly, but check our
+ * list for extra sanity.
+ */
+ ahc = ahc_find_softc(*(struct ahc_softc **)host->hostdata);
+ if (ahc != NULL) {
+ u_long s;
+
+ ahc_lock(ahc, &s);
+ ahc_intr_enable(ahc, FALSE);
+ ahc_unlock(ahc, &s);
+ ahc_free(ahc);
+ }
+ }
+ ahc_list_unlock(&l);
+ 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++ > AHC_SCB_MAX)
+ 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)