1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
5043 lines
137 KiB
C
5043 lines
137 KiB
C
/*
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* Adaptec AIC7xxx device driver for Linux.
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*
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* $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $
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*
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* Copyright (c) 1994 John Aycock
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* The University of Calgary Department of Computer Science.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
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* driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
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* config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
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* the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
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* the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
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* (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
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* the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
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* ANSI SCSI-2 specification (draft 10c), ...
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*
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* --------------------------------------------------------------------------
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*
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* Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
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*
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* Substantially modified to include support for wide and twin bus
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* adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
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* SCB paging, and other rework of the code.
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*
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* --------------------------------------------------------------------------
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* Copyright (c) 1994-2000 Justin T. Gibbs.
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* Copyright (c) 2000-2001 Adaptec Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*
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*---------------------------------------------------------------------------
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*
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* Thanks also go to (in alphabetical order) the following:
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*
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* Rory Bolt - Sequencer bug fixes
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* Jay Estabrook - Initial DEC Alpha support
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* Doug Ledford - Much needed abort/reset bug fixes
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* Kai Makisara - DMAing of SCBs
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*
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* A Boot time option was also added for not resetting the scsi bus.
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*
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* Form: aic7xxx=extended
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* aic7xxx=no_reset
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* aic7xxx=verbose
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*
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* Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
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*
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* Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp
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*/
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/*
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* Further driver modifications made by Doug Ledford <dledford@redhat.com>
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*
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* Copyright (c) 1997-1999 Doug Ledford
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*
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* These changes are released under the same licensing terms as the FreeBSD
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* driver written by Justin Gibbs. Please see his Copyright notice above
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* for the exact terms and conditions covering my changes as well as the
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* warranty statement.
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*
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* Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
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* but are not limited to:
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*
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* 1: Import of the latest FreeBSD sequencer code for this driver
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* 2: Modification of kernel code to accommodate different sequencer semantics
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* 3: Extensive changes throughout kernel portion of driver to improve
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* abort/reset processing and error hanndling
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* 4: Other work contributed by various people on the Internet
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* 5: Changes to printk information and verbosity selection code
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* 6: General reliability related changes, especially in IRQ management
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* 7: Modifications to the default probe/attach order for supported cards
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* 8: SMP friendliness has been improved
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*
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*/
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#include "aic7xxx_osm.h"
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#include "aic7xxx_inline.h"
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#include <scsi/scsicam.h>
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/*
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* Include aiclib.c as part of our
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* "module dependencies are hard" work around.
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*/
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#include "aiclib.c"
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#include <linux/init.h> /* __setup */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
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#include "sd.h" /* For geometry detection */
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#endif
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#include <linux/mm.h> /* For fetching system memory size */
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#include <linux/blkdev.h> /* For block_size() */
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#include <linux/delay.h> /* For ssleep/msleep */
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/*
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* Lock protecting manipulation of the ahc softc list.
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*/
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spinlock_t ahc_list_spinlock;
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
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/* For dynamic sglist size calculation. */
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u_int ahc_linux_nseg;
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#endif
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/*
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* Set this to the delay in seconds after SCSI bus reset.
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* Note, we honor this only for the initial bus reset.
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* The scsi error recovery code performs its own bus settle
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* delay handling for error recovery actions.
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*/
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#ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
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#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
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#else
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#define AIC7XXX_RESET_DELAY 5000
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#endif
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/*
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* Control collection of SCSI transfer statistics for the /proc filesystem.
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*
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* NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
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* NOTE: This does affect performance since it has to maintain statistics.
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*/
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#ifdef CONFIG_AIC7XXX_PROC_STATS
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#define AIC7XXX_PROC_STATS
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#endif
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/*
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* To change the default number of tagged transactions allowed per-device,
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* add a line to the lilo.conf file like:
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* append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
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* which will result in the first four devices on the first two
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* controllers being set to a tagged queue depth of 32.
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*
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* The tag_commands is an array of 16 to allow for wide and twin adapters.
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* Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
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* for channel 1.
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*/
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typedef struct {
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uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
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} adapter_tag_info_t;
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/*
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* Modify this as you see fit for your system.
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*
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* 0 tagged queuing disabled
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* 1 <= n <= 253 n == max tags ever dispatched.
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*
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* The driver will throttle the number of commands dispatched to a
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* device if it returns queue full. For devices with a fixed maximum
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* queue depth, the driver will eventually determine this depth and
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* lock it in (a console message is printed to indicate that a lock
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* has occurred). On some devices, queue full is returned for a temporary
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* resource shortage. These devices will return queue full at varying
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* depths. The driver will throttle back when the queue fulls occur and
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* attempt to slowly increase the depth over time as the device recovers
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* from the resource shortage.
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*
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* In this example, the first line will disable tagged queueing for all
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* the devices on the first probed aic7xxx adapter.
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*
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* The second line enables tagged queueing with 4 commands/LUN for IDs
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* (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
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* driver to attempt to use up to 64 tags for ID 1.
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*
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* The third line is the same as the first line.
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*
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* The fourth line disables tagged queueing for devices 0 and 3. It
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* enables tagged queueing for the other IDs, with 16 commands/LUN
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* for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
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* IDs 2, 5-7, and 9-15.
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*/
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/*
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* NOTE: The below structure is for reference only, the actual structure
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* to modify in order to change things is just below this comment block.
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adapter_tag_info_t aic7xxx_tag_info[] =
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{
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{{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
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{{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
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{{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
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{{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
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};
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*/
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#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
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#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
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#else
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#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
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#endif
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#define AIC7XXX_CONFIGED_TAG_COMMANDS { \
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AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
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AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
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AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
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AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
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AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
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AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
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AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
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AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
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}
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/*
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* By default, use the number of commands specified by
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* the users kernel configuration.
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*/
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static adapter_tag_info_t aic7xxx_tag_info[] =
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{
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{AIC7XXX_CONFIGED_TAG_COMMANDS},
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{AIC7XXX_CONFIGED_TAG_COMMANDS},
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{AIC7XXX_CONFIGED_TAG_COMMANDS},
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{AIC7XXX_CONFIGED_TAG_COMMANDS},
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{AIC7XXX_CONFIGED_TAG_COMMANDS},
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{AIC7XXX_CONFIGED_TAG_COMMANDS},
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{AIC7XXX_CONFIGED_TAG_COMMANDS},
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{AIC7XXX_CONFIGED_TAG_COMMANDS},
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{AIC7XXX_CONFIGED_TAG_COMMANDS},
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{AIC7XXX_CONFIGED_TAG_COMMANDS},
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{AIC7XXX_CONFIGED_TAG_COMMANDS},
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{AIC7XXX_CONFIGED_TAG_COMMANDS},
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{AIC7XXX_CONFIGED_TAG_COMMANDS},
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{AIC7XXX_CONFIGED_TAG_COMMANDS},
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{AIC7XXX_CONFIGED_TAG_COMMANDS},
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{AIC7XXX_CONFIGED_TAG_COMMANDS}
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};
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/*
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* DV option:
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*
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* positive value = DV Enabled
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* zero = DV Disabled
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* negative value = DV Default for adapter type/seeprom
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*/
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#ifdef CONFIG_AIC7XXX_DV_SETTING
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#define AIC7XXX_CONFIGED_DV CONFIG_AIC7XXX_DV_SETTING
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#else
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#define AIC7XXX_CONFIGED_DV -1
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#endif
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static int8_t aic7xxx_dv_settings[] =
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{
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AIC7XXX_CONFIGED_DV,
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AIC7XXX_CONFIGED_DV,
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AIC7XXX_CONFIGED_DV,
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AIC7XXX_CONFIGED_DV,
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AIC7XXX_CONFIGED_DV,
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AIC7XXX_CONFIGED_DV,
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AIC7XXX_CONFIGED_DV,
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AIC7XXX_CONFIGED_DV,
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AIC7XXX_CONFIGED_DV,
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AIC7XXX_CONFIGED_DV,
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AIC7XXX_CONFIGED_DV,
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AIC7XXX_CONFIGED_DV,
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AIC7XXX_CONFIGED_DV,
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AIC7XXX_CONFIGED_DV,
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AIC7XXX_CONFIGED_DV,
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AIC7XXX_CONFIGED_DV
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};
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/*
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* There should be a specific return value for this in scsi.h, but
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* it seems that most drivers ignore it.
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*/
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#define DID_UNDERFLOW DID_ERROR
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void
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ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
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{
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printk("(scsi%d:%c:%d:%d): ",
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ahc->platform_data->host->host_no,
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scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
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scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
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scb != NULL ? SCB_GET_LUN(scb) : -1);
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}
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/*
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* XXX - these options apply unilaterally to _all_ 274x/284x/294x
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* cards in the system. This should be fixed. Exceptions to this
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* rule are noted in the comments.
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*/
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/*
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* Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
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* has no effect on any later resets that might occur due to things like
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* SCSI bus timeouts.
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*/
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static uint32_t aic7xxx_no_reset;
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/*
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* Certain PCI motherboards will scan PCI devices from highest to lowest,
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* others scan from lowest to highest, and they tend to do all kinds of
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* strange things when they come into contact with PCI bridge chips. The
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* net result of all this is that the PCI card that is actually used to boot
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* the machine is very hard to detect. Most motherboards go from lowest
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* PCI slot number to highest, and the first SCSI controller found is the
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* one you boot from. The only exceptions to this are when a controller
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* has its BIOS disabled. So, we by default sort all of our SCSI controllers
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* from lowest PCI slot number to highest PCI slot number. We also force
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* all controllers with their BIOS disabled to the end of the list. This
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* works on *almost* all computers. Where it doesn't work, we have this
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* option. Setting this option to non-0 will reverse the order of the sort
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* to highest first, then lowest, but will still leave cards with their BIOS
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* disabled at the very end. That should fix everyone up unless there are
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* really strange cirumstances.
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*/
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static uint32_t aic7xxx_reverse_scan;
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/*
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* Should we force EXTENDED translation on a controller.
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* 0 == Use whatever is in the SEEPROM or default to off
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* 1 == Use whatever is in the SEEPROM or default to on
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*/
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static uint32_t aic7xxx_extended;
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/*
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* PCI bus parity checking of the Adaptec controllers. This is somewhat
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* dubious at best. To my knowledge, this option has never actually
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* solved a PCI parity problem, but on certain machines with broken PCI
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* chipset configurations where stray PCI transactions with bad parity are
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* the norm rather than the exception, the error messages can be overwelming.
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* It's included in the driver for completeness.
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* 0 = Shut off PCI parity check
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* non-0 = reverse polarity pci parity checking
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*/
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static uint32_t aic7xxx_pci_parity = ~0;
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/*
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* Certain newer motherboards have put new PCI based devices into the
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* IO spaces that used to typically be occupied by VLB or EISA cards.
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* This overlap can cause these newer motherboards to lock up when scanned
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* for older EISA and VLB devices. Setting this option to non-0 will
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* cause the driver to skip scanning for any VLB or EISA controllers and
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* only support the PCI controllers. NOTE: this means that if the kernel
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* os compiled with PCI support disabled, then setting this to non-0
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* would result in never finding any devices :)
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*/
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#ifndef CONFIG_AIC7XXX_PROBE_EISA_VL
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uint32_t aic7xxx_probe_eisa_vl;
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#else
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uint32_t aic7xxx_probe_eisa_vl = ~0;
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#endif
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/*
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* There are lots of broken chipsets in the world. Some of them will
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* violate the PCI spec when we issue byte sized memory writes to our
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* controller. I/O mapped register access, if allowed by the given
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* platform, will work in almost all cases.
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*/
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uint32_t aic7xxx_allow_memio = ~0;
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/*
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* aic7xxx_detect() has been run, so register all device arrivals
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* immediately with the system rather than deferring to the sorted
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* attachment performed by aic7xxx_detect().
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*/
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int aic7xxx_detect_complete;
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/*
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* So that we can set how long each device is given as a selection timeout.
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* The table of values goes like this:
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* 0 - 256ms
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* 1 - 128ms
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* 2 - 64ms
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* 3 - 32ms
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* We default to 256ms because some older devices need a longer time
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* to respond to initial selection.
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*/
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static uint32_t aic7xxx_seltime;
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/*
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* Certain devices do not perform any aging on commands. Should the
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* device be saturated by commands in one portion of the disk, it is
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* possible for transactions on far away sectors to never be serviced.
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* To handle these devices, we can periodically send an ordered tag to
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* force all outstanding transactions to be serviced prior to a new
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* transaction.
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*/
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uint32_t aic7xxx_periodic_otag;
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/*
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* Module information and settable options.
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*/
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static char *aic7xxx = NULL;
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MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
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MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver");
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
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module_param(aic7xxx, charp, 0444);
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MODULE_PARM_DESC(aic7xxx,
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"period delimited, options string.\n"
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" verbose Enable verbose/diagnostic logging\n"
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" allow_memio Allow device registers to be memory mapped\n"
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" debug Bitmask of debug values to enable\n"
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" no_probe Toggle EISA/VLB controller probing\n"
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" probe_eisa_vl Toggle EISA/VLB controller probing\n"
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" no_reset Supress initial bus resets\n"
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" extended Enable extended geometry on all controllers\n"
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" periodic_otag Send an ordered tagged transaction\n"
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" periodically to prevent tag starvation.\n"
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" This may be required by some older disk\n"
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" drives or RAID arrays.\n"
|
|
" reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
|
|
" tag_info:<tag_str> Set per-target tag depth\n"
|
|
" global_tag_depth:<int> Global tag depth for every target\n"
|
|
" on every bus\n"
|
|
" dv:<dv_settings> Set per-controller Domain Validation Setting.\n"
|
|
" seltime:<int> Selection Timeout\n"
|
|
" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
|
|
"\n"
|
|
" Sample /etc/modprobe.conf line:\n"
|
|
" Toggle EISA/VLB probing\n"
|
|
" Set tag depth on Controller 1/Target 1 to 10 tags\n"
|
|
" Shorten the selection timeout to 128ms\n"
|
|
"\n"
|
|
" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
|
|
);
|
|
|
|
static void ahc_linux_handle_scsi_status(struct ahc_softc *,
|
|
struct ahc_linux_device *,
|
|
struct scb *);
|
|
static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
|
|
Scsi_Cmnd *cmd);
|
|
static void ahc_linux_filter_inquiry(struct ahc_softc*, struct ahc_devinfo*);
|
|
static void ahc_linux_sem_timeout(u_long arg);
|
|
static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
|
|
static void ahc_linux_release_simq(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_size_nseg(void);
|
|
static void ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc);
|
|
static void ahc_linux_start_dv(struct ahc_softc *ahc);
|
|
static void ahc_linux_dv_timeout(struct scsi_cmnd *cmd);
|
|
static int ahc_linux_dv_thread(void *data);
|
|
static void ahc_linux_kill_dv_thread(struct ahc_softc *ahc);
|
|
static void ahc_linux_dv_target(struct ahc_softc *ahc, u_int target);
|
|
static void ahc_linux_dv_transition(struct ahc_softc *ahc,
|
|
struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo,
|
|
struct ahc_linux_target *targ);
|
|
static void ahc_linux_dv_fill_cmd(struct ahc_softc *ahc,
|
|
struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo);
|
|
static void ahc_linux_dv_inq(struct ahc_softc *ahc,
|
|
struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo,
|
|
struct ahc_linux_target *targ,
|
|
u_int request_length);
|
|
static void ahc_linux_dv_tur(struct ahc_softc *ahc,
|
|
struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo);
|
|
static void ahc_linux_dv_rebd(struct ahc_softc *ahc,
|
|
struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo,
|
|
struct ahc_linux_target *targ);
|
|
static void ahc_linux_dv_web(struct ahc_softc *ahc,
|
|
struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo,
|
|
struct ahc_linux_target *targ);
|
|
static void ahc_linux_dv_reb(struct ahc_softc *ahc,
|
|
struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo,
|
|
struct ahc_linux_target *targ);
|
|
static void ahc_linux_dv_su(struct ahc_softc *ahc,
|
|
struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo,
|
|
struct ahc_linux_target *targ);
|
|
static int ahc_linux_fallback(struct ahc_softc *ahc,
|
|
struct ahc_devinfo *devinfo);
|
|
static void ahc_linux_dv_complete(Scsi_Cmnd *cmd);
|
|
static void ahc_linux_generate_dv_pattern(struct ahc_linux_target *targ);
|
|
static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
|
|
struct ahc_devinfo *devinfo);
|
|
static u_int ahc_linux_user_dv_setting(struct ahc_softc *ahc);
|
|
static void ahc_linux_device_queue_depth(struct ahc_softc *ahc,
|
|
struct ahc_linux_device *dev);
|
|
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_global(char *p);
|
|
static aic_option_callback_t ahc_linux_setup_tag_info;
|
|
static aic_option_callback_t ahc_linux_setup_dv;
|
|
static int aic7xxx_setup(char *s);
|
|
static int ahc_linux_next_unit(void);
|
|
static void ahc_runq_tasklet(unsigned long data);
|
|
static struct ahc_cmd *ahc_linux_run_complete_queue(struct ahc_softc *ahc);
|
|
|
|
/********************************* Inlines ************************************/
|
|
static __inline void ahc_schedule_runq(struct ahc_softc *ahc);
|
|
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_schedule_completeq(struct ahc_softc *ahc);
|
|
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_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,
|
|
dma_addr_t addr, bus_size_t len);
|
|
|
|
static __inline void
|
|
ahc_schedule_completeq(struct ahc_softc *ahc)
|
|
{
|
|
if ((ahc->platform_data->flags & AHC_RUN_CMPLT_Q_TIMER) == 0) {
|
|
ahc->platform_data->flags |= AHC_RUN_CMPLT_Q_TIMER;
|
|
ahc->platform_data->completeq_timer.expires = jiffies;
|
|
add_timer(&ahc->platform_data->completeq_timer);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Must be called with our lock held.
|
|
*/
|
|
static __inline void
|
|
ahc_schedule_runq(struct ahc_softc *ahc)
|
|
{
|
|
tasklet_schedule(&ahc->platform_data->runq_tasklet);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
#define AHC_LINUX_MAX_RETURNED_ERRORS 4
|
|
static struct ahc_cmd *
|
|
ahc_linux_run_complete_queue(struct ahc_softc *ahc)
|
|
{
|
|
struct ahc_cmd *acmd;
|
|
u_long done_flags;
|
|
int with_errors;
|
|
|
|
with_errors = 0;
|
|
ahc_done_lock(ahc, &done_flags);
|
|
while ((acmd = TAILQ_FIRST(&ahc->platform_data->completeq)) != NULL) {
|
|
Scsi_Cmnd *cmd;
|
|
|
|
if (with_errors > AHC_LINUX_MAX_RETURNED_ERRORS) {
|
|
/*
|
|
* Linux uses stack recursion to requeue
|
|
* commands that need to be retried. Avoid
|
|
* blowing out the stack by "spoon feeding"
|
|
* commands that completed with error back
|
|
* the operating system in case they are going
|
|
* to be retried. "ick"
|
|
*/
|
|
ahc_schedule_completeq(ahc);
|
|
break;
|
|
}
|
|
TAILQ_REMOVE(&ahc->platform_data->completeq,
|
|
acmd, acmd_links.tqe);
|
|
cmd = &acmd_scsi_cmd(acmd);
|
|
cmd->host_scribble = NULL;
|
|
if (ahc_cmd_get_transaction_status(cmd) != DID_OK
|
|
|| (cmd->result & 0xFF) != SCSI_STATUS_OK)
|
|
with_errors++;
|
|
|
|
cmd->scsi_done(cmd);
|
|
}
|
|
ahc_done_unlock(ahc, &done_flags);
|
|
return (acmd);
|
|
}
|
|
|
|
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
|
|
&& AHC_DV_SIMQ_FROZEN(ahc) == 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_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, dma_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(dma_addr_t) > 4
|
|
&& (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
|
|
len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
|
|
|
|
sg->len = ahc_htole32(len);
|
|
return (consumed);
|
|
}
|
|
|
|
/************************ Host template entry points *************************/
|
|
static int ahc_linux_detect(Scsi_Host_Template *);
|
|
static int ahc_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *));
|
|
static const char *ahc_linux_info(struct Scsi_Host *);
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
|
|
static int ahc_linux_slave_alloc(Scsi_Device *);
|
|
static int ahc_linux_slave_configure(Scsi_Device *);
|
|
static void ahc_linux_slave_destroy(Scsi_Device *);
|
|
#if defined(__i386__)
|
|
static int ahc_linux_biosparam(struct scsi_device*,
|
|
struct block_device*,
|
|
sector_t, int[]);
|
|
#endif
|
|
#else
|
|
static int ahc_linux_release(struct Scsi_Host *);
|
|
static void ahc_linux_select_queue_depth(struct Scsi_Host *host,
|
|
Scsi_Device *scsi_devs);
|
|
#if defined(__i386__)
|
|
static int ahc_linux_biosparam(Disk *, kdev_t, int[]);
|
|
#endif
|
|
#endif
|
|
static int ahc_linux_bus_reset(Scsi_Cmnd *);
|
|
static int ahc_linux_dev_reset(Scsi_Cmnd *);
|
|
static int ahc_linux_abort(Scsi_Cmnd *);
|
|
|
|
/*
|
|
* Calculate a safe value for AHC_NSEG (as expressed through ahc_linux_nseg).
|
|
*
|
|
* In pre-2.5.X...
|
|
* The midlayer allocates an S/G array dynamically when a command is issued
|
|
* using SCSI malloc. This array, which is in an OS dependent format that
|
|
* must later be copied to our private S/G list, is sized to house just the
|
|
* number of segments needed for the current transfer. Since the code that
|
|
* sizes the SCSI malloc pool does not take into consideration fragmentation
|
|
* of the pool, executing transactions numbering just a fraction of our
|
|
* concurrent transaction limit with list lengths aproaching AHC_NSEG will
|
|
* quickly depleat the SCSI malloc pool of usable space. Unfortunately, the
|
|
* mid-layer does not properly handle this scsi malloc failures for the S/G
|
|
* array and the result can be a lockup of the I/O subsystem. We try to size
|
|
* our S/G list so that it satisfies our drivers allocation requirements in
|
|
* addition to avoiding fragmentation of the SCSI malloc pool.
|
|
*/
|
|
static void
|
|
ahc_linux_size_nseg(void)
|
|
{
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
|
|
u_int cur_size;
|
|
u_int best_size;
|
|
|
|
/*
|
|
* The SCSI allocator rounds to the nearest 512 bytes
|
|
* an cannot allocate across a page boundary. Our algorithm
|
|
* is to start at 1K of scsi malloc space per-command and
|
|
* loop through all factors of the PAGE_SIZE and pick the best.
|
|
*/
|
|
best_size = 0;
|
|
for (cur_size = 1024; cur_size <= PAGE_SIZE; cur_size *= 2) {
|
|
u_int nseg;
|
|
|
|
nseg = cur_size / sizeof(struct scatterlist);
|
|
if (nseg < AHC_LINUX_MIN_NSEG)
|
|
continue;
|
|
|
|
if (best_size == 0) {
|
|
best_size = cur_size;
|
|
ahc_linux_nseg = nseg;
|
|
} else {
|
|
u_int best_rem;
|
|
u_int cur_rem;
|
|
|
|
/*
|
|
* Compare the traits of the current "best_size"
|
|
* with the current size to determine if the
|
|
* current size is a better size.
|
|
*/
|
|
best_rem = best_size % sizeof(struct scatterlist);
|
|
cur_rem = cur_size % sizeof(struct scatterlist);
|
|
if (cur_rem < best_rem) {
|
|
best_size = cur_size;
|
|
ahc_linux_nseg = nseg;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Try to detect an Adaptec 7XXX controller.
|
|
*/
|
|
static int
|
|
ahc_linux_detect(Scsi_Host_Template *template)
|
|
{
|
|
struct ahc_softc *ahc;
|
|
int found = 0;
|
|
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
|
|
/*
|
|
* It is a bug that the upper layer takes
|
|
* this lock just prior to calling us.
|
|
*/
|
|
spin_unlock_irq(&io_request_lock);
|
|
#endif
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
ahc_linux_size_nseg();
|
|
/*
|
|
* If we've been passed any parameters, process them now.
|
|
*/
|
|
if (aic7xxx)
|
|
aic7xxx_setup(aic7xxx);
|
|
|
|
template->proc_name = "aic7xxx";
|
|
|
|
/*
|
|
* Initialize our softc list lock prior to
|
|
* probing for any adapters.
|
|
*/
|
|
ahc_list_lockinit();
|
|
|
|
found = ahc_linux_pci_init();
|
|
if (!ahc_linux_eisa_init())
|
|
found++;
|
|
|
|
/*
|
|
* Register with the SCSI layer all
|
|
* controllers we've found.
|
|
*/
|
|
TAILQ_FOREACH(ahc, &ahc_tailq, links) {
|
|
|
|
if (ahc_linux_register_host(ahc, template) == 0)
|
|
found++;
|
|
}
|
|
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
|
|
spin_lock_irq(&io_request_lock);
|
|
#endif
|
|
aic7xxx_detect_complete++;
|
|
|
|
return (found);
|
|
}
|
|
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
|
|
/*
|
|
* 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);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Return a string describing the driver.
|
|
*/
|
|
static 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);
|
|
}
|
|
|
|
/*
|
|
* Queue an SCB to the controller.
|
|
*/
|
|
static 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->device->host->hostdata;
|
|
|
|
/*
|
|
* Save the callback on completion function.
|
|
*/
|
|
cmd->scsi_done = scsi_done;
|
|
|
|
ahc_midlayer_entrypoint_lock(ahc, &flags);
|
|
|
|
/*
|
|
* Close the race of a command that was in the process of
|
|
* being queued to us just as our simq was frozen. Let
|
|
* DV commands through so long as we are only frozen to
|
|
* perform DV.
|
|
*/
|
|
if (ahc->platform_data->qfrozen != 0
|
|
&& AHC_DV_CMD(cmd) == 0) {
|
|
|
|
ahc_cmd_set_transaction_status(cmd, CAM_REQUEUE_REQ);
|
|
ahc_linux_queue_cmd_complete(ahc, cmd);
|
|
ahc_schedule_completeq(ahc);
|
|
ahc_midlayer_entrypoint_unlock(ahc, &flags);
|
|
return (0);
|
|
}
|
|
dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id,
|
|
cmd->device->lun, /*alloc*/TRUE);
|
|
if (dev == NULL) {
|
|
ahc_cmd_set_transaction_status(cmd, CAM_RESRC_UNAVAIL);
|
|
ahc_linux_queue_cmd_complete(ahc, cmd);
|
|
ahc_schedule_completeq(ahc);
|
|
ahc_midlayer_entrypoint_unlock(ahc, &flags);
|
|
printf("%s: aic7xxx_linux_queue - Unable to allocate device!\n",
|
|
ahc_name(ahc));
|
|
return (0);
|
|
}
|
|
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_midlayer_entrypoint_unlock(ahc, &flags);
|
|
return (0);
|
|
}
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
|
|
static int
|
|
ahc_linux_slave_alloc(Scsi_Device *device)
|
|
{
|
|
struct ahc_softc *ahc;
|
|
|
|
ahc = *((struct ahc_softc **)device->host->hostdata);
|
|
if (bootverbose)
|
|
printf("%s: Slave Alloc %d\n", ahc_name(ahc), device->id);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
ahc_linux_slave_configure(Scsi_Device *device)
|
|
{
|
|
struct ahc_softc *ahc;
|
|
struct ahc_linux_device *dev;
|
|
u_long flags;
|
|
|
|
ahc = *((struct ahc_softc **)device->host->hostdata);
|
|
if (bootverbose)
|
|
printf("%s: Slave Configure %d\n", ahc_name(ahc), device->id);
|
|
ahc_midlayer_entrypoint_lock(ahc, &flags);
|
|
/*
|
|
* Since Linux has attached to the device, configure
|
|
* it so we don't free and allocate the device
|
|
* structure on every command.
|
|
*/
|
|
dev = ahc_linux_get_device(ahc, device->channel,
|
|
device->id, device->lun,
|
|
/*alloc*/TRUE);
|
|
if (dev != NULL) {
|
|
dev->flags &= ~AHC_DEV_UNCONFIGURED;
|
|
dev->scsi_device = device;
|
|
ahc_linux_device_queue_depth(ahc, dev);
|
|
}
|
|
ahc_midlayer_entrypoint_unlock(ahc, &flags);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_slave_destroy(Scsi_Device *device)
|
|
{
|
|
struct ahc_softc *ahc;
|
|
struct ahc_linux_device *dev;
|
|
u_long flags;
|
|
|
|
ahc = *((struct ahc_softc **)device->host->hostdata);
|
|
if (bootverbose)
|
|
printf("%s: Slave Destroy %d\n", ahc_name(ahc), device->id);
|
|
ahc_midlayer_entrypoint_lock(ahc, &flags);
|
|
dev = ahc_linux_get_device(ahc, device->channel,
|
|
device->id, device->lun,
|
|
/*alloc*/FALSE);
|
|
/*
|
|
* Filter out "silly" deletions of real devices by only
|
|
* deleting devices that have had slave_configure()
|
|
* called on them. All other devices that have not
|
|
* been configured will automatically be deleted by
|
|
* the refcounting process.
|
|
*/
|
|
if (dev != NULL
|
|
&& (dev->flags & AHC_DEV_SLAVE_CONFIGURED) != 0) {
|
|
dev->flags |= AHC_DEV_UNCONFIGURED;
|
|
if (TAILQ_EMPTY(&dev->busyq)
|
|
&& dev->active == 0
|
|
&& (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0)
|
|
ahc_linux_free_device(ahc, dev);
|
|
}
|
|
ahc_midlayer_entrypoint_unlock(ahc, &flags);
|
|
}
|
|
#else
|
|
/*
|
|
* 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;
|
|
Scsi_Device *ldev;
|
|
struct ahc_softc *ahc;
|
|
u_long flags;
|
|
|
|
ahc = *((struct ahc_softc **)host->hostdata);
|
|
ahc_lock(ahc, &flags);
|
|
for (device = scsi_devs; device != NULL; device = device->next) {
|
|
|
|
/*
|
|
* Watch out for duplicate devices. This works around
|
|
* some quirks in how the SCSI scanning code does its
|
|
* device management.
|
|
*/
|
|
for (ldev = scsi_devs; ldev != device; ldev = ldev->next) {
|
|
if (ldev->host == device->host
|
|
&& ldev->channel == device->channel
|
|
&& ldev->id == device->id
|
|
&& ldev->lun == device->lun)
|
|
break;
|
|
}
|
|
/* Skip duplicate. */
|
|
if (ldev != device)
|
|
continue;
|
|
|
|
if (device->host == host) {
|
|
struct ahc_linux_device *dev;
|
|
|
|
/*
|
|
* Since Linux has attached to the device, configure
|
|
* it so we don't free and allocate the device
|
|
* structure on every command.
|
|
*/
|
|
dev = ahc_linux_get_device(ahc, device->channel,
|
|
device->id, device->lun,
|
|
/*alloc*/TRUE);
|
|
if (dev != NULL) {
|
|
dev->flags &= ~AHC_DEV_UNCONFIGURED;
|
|
dev->scsi_device = device;
|
|
ahc_linux_device_queue_depth(ahc, dev);
|
|
device->queue_depth = dev->openings
|
|
+ dev->active;
|
|
if ((dev->flags & (AHC_DEV_Q_BASIC
|
|
| AHC_DEV_Q_TAGGED)) == 0) {
|
|
/*
|
|
* 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;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
ahc_unlock(ahc, &flags);
|
|
}
|
|
#endif
|
|
|
|
#if defined(__i386__)
|
|
/*
|
|
* Return the disk geometry for the given SCSI device.
|
|
*/
|
|
static int
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
|
|
ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
|
|
sector_t capacity, int geom[])
|
|
{
|
|
uint8_t *bh;
|
|
#else
|
|
ahc_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
|
|
{
|
|
struct scsi_device *sdev = disk->device;
|
|
u_long capacity = disk->capacity;
|
|
struct buffer_head *bh;
|
|
#endif
|
|
int heads;
|
|
int sectors;
|
|
int cylinders;
|
|
int ret;
|
|
int extended;
|
|
struct ahc_softc *ahc;
|
|
u_int channel;
|
|
|
|
ahc = *((struct ahc_softc **)sdev->host->hostdata);
|
|
channel = sdev->channel;
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
|
|
bh = scsi_bios_ptable(bdev);
|
|
#elif 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, capacity,
|
|
&geom[2], &geom[0], &geom[1]);
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
|
|
kfree(bh);
|
|
#else
|
|
brelse(bh);
|
|
#endif
|
|
if (ret != -1)
|
|
return (ret);
|
|
}
|
|
heads = 64;
|
|
sectors = 32;
|
|
cylinders = aic_sector_div(capacity, heads, sectors);
|
|
|
|
if (aic7xxx_extended != 0)
|
|
extended = 1;
|
|
else if (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 = aic_sector_div(capacity, heads, sectors);
|
|
}
|
|
geom[0] = heads;
|
|
geom[1] = sectors;
|
|
geom[2] = cylinders;
|
|
return (0);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Abort the current SCSI command(s).
|
|
*/
|
|
static 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.
|
|
*/
|
|
static 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.
|
|
*/
|
|
static int
|
|
ahc_linux_bus_reset(Scsi_Cmnd *cmd)
|
|
{
|
|
struct ahc_softc *ahc;
|
|
u_long s;
|
|
int found;
|
|
|
|
ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
|
|
ahc_midlayer_entrypoint_lock(ahc, &s);
|
|
found = ahc_reset_channel(ahc, cmd->device->channel + 'A',
|
|
/*initiate reset*/TRUE);
|
|
ahc_linux_run_complete_queue(ahc);
|
|
ahc_midlayer_entrypoint_unlock(ahc, &s);
|
|
|
|
if (bootverbose)
|
|
printf("%s: SCSI bus reset delivered. "
|
|
"%d SCBs aborted.\n", ahc_name(ahc), found);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
Scsi_Host_Template aic7xxx_driver_template = {
|
|
.module = THIS_MODULE,
|
|
.name = "aic7xxx",
|
|
.proc_info = ahc_linux_proc_info,
|
|
.info = ahc_linux_info,
|
|
.queuecommand = ahc_linux_queue,
|
|
.eh_abort_handler = ahc_linux_abort,
|
|
.eh_device_reset_handler = ahc_linux_dev_reset,
|
|
.eh_bus_reset_handler = ahc_linux_bus_reset,
|
|
#if defined(__i386__)
|
|
.bios_param = ahc_linux_biosparam,
|
|
#endif
|
|
.can_queue = AHC_MAX_QUEUE,
|
|
.this_id = -1,
|
|
.cmd_per_lun = 2,
|
|
.use_clustering = ENABLE_CLUSTERING,
|
|
.slave_alloc = ahc_linux_slave_alloc,
|
|
.slave_configure = ahc_linux_slave_configure,
|
|
.slave_destroy = ahc_linux_slave_destroy,
|
|
};
|
|
|
|
/**************************** Tasklet Handler *********************************/
|
|
|
|
/*
|
|
* In 2.4.X and above, this routine is called from a tasklet,
|
|
* so we must re-acquire our lock prior to executing this code.
|
|
* In all prior kernels, ahc_schedule_runq() calls this routine
|
|
* directly and ahc_schedule_runq() is called with our lock held.
|
|
*/
|
|
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);
|
|
}
|
|
|
|
/******************************** Macros **************************************/
|
|
#define BUILD_SCSIID(ahc, cmd) \
|
|
((((cmd)->device->id << TID_SHIFT) & TID) \
|
|
| (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
|
|
| (((cmd)->device->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,
|
|
dma_addr_t lowaddr, dma_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;
|
|
|
|
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 (pci_set_dma_mask(ahc->dev_softc, 0xFFFFFFFF)) {
|
|
printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
|
|
kfree(map);
|
|
return (ENODEV);
|
|
}
|
|
*vaddr = pci_alloc_consistent(ahc->dev_softc,
|
|
dmat->maxsize, &map->bus_addr);
|
|
if (ahc->dev_softc != NULL)
|
|
if (pci_set_dma_mask(ahc->dev_softc,
|
|
ahc->platform_data->hw_dma_mask)) {
|
|
printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
|
|
kfree(map);
|
|
return (ENODEV);
|
|
}
|
|
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)
|
|
{
|
|
pci_free_consistent(ahc->dev_softc, dmat->maxsize,
|
|
vaddr, map->bus_addr);
|
|
}
|
|
|
|
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;
|
|
|
|
stack_sg.ds_addr = map->bus_addr;
|
|
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.
|
|
* Now it's 2.6.5, but just in case...
|
|
*/
|
|
BUG_ON(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 ***************************/
|
|
/*
|
|
* Compare "left hand" softc with "right hand" softc, returning:
|
|
* < 0 - lahc has a lower priority than rahc
|
|
* 0 - Softcs are equal
|
|
* > 0 - lahc has a higher priority than rahc
|
|
*/
|
|
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 = rvalue - lvalue;
|
|
if (value != 0)
|
|
return (value);
|
|
|
|
/* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */
|
|
switch (rvalue) {
|
|
#ifdef CONFIG_PCI
|
|
case AHC_PCI:
|
|
{
|
|
char primary_channel;
|
|
|
|
if (aic7xxx_reverse_scan != 0)
|
|
value = ahc_get_pci_bus(lahc->dev_softc)
|
|
- ahc_get_pci_bus(rahc->dev_softc);
|
|
else
|
|
value = ahc_get_pci_bus(rahc->dev_softc)
|
|
- ahc_get_pci_bus(lahc->dev_softc);
|
|
if (value != 0)
|
|
break;
|
|
if (aic7xxx_reverse_scan != 0)
|
|
value = ahc_get_pci_slot(lahc->dev_softc)
|
|
- ahc_get_pci_slot(rahc->dev_softc);
|
|
else
|
|
value = ahc_get_pci_slot(rahc->dev_softc)
|
|
- ahc_get_pci_slot(lahc->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 highest priority.
|
|
*/
|
|
primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A';
|
|
value = -1;
|
|
if (lahc->channel == primary_channel)
|
|
value = 1;
|
|
break;
|
|
}
|
|
#endif
|
|
case AHC_EISA:
|
|
if ((rahc->flags & AHC_BIOS_ENABLED) != 0) {
|
|
value = rahc->platform_data->bios_address
|
|
- lahc->platform_data->bios_address;
|
|
} else {
|
|
value = rahc->bsh.ioport
|
|
- lahc->bsh.ioport;
|
|
}
|
|
break;
|
|
default:
|
|
panic("ahc_softc_sort: invalid bus type");
|
|
}
|
|
return (value);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_setup_tag_info_global(char *p)
|
|
{
|
|
int tags, i, j;
|
|
|
|
tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
|
|
printf("Setting Global Tags= %d\n", tags);
|
|
|
|
for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) {
|
|
for (j = 0; j < AHC_NUM_TARGETS; j++) {
|
|
aic7xxx_tag_info[i].tag_commands[j] = tags;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
|
|
{
|
|
|
|
if ((instance >= 0) && (targ >= 0)
|
|
&& (instance < NUM_ELEMENTS(aic7xxx_tag_info))
|
|
&& (targ < AHC_NUM_TARGETS)) {
|
|
aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
|
|
if (bootverbose)
|
|
printf("tag_info[%d:%d] = %d\n", instance, targ, value);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ahc_linux_setup_dv(u_long arg, int instance, int targ, int32_t value)
|
|
{
|
|
|
|
if ((instance >= 0)
|
|
&& (instance < NUM_ELEMENTS(aic7xxx_dv_settings))) {
|
|
aic7xxx_dv_settings[instance] = value;
|
|
if (bootverbose)
|
|
printf("dv[%d] = %d\n", instance, value);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
static 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 },
|
|
{ "allow_memio", &aic7xxx_allow_memio},
|
|
#ifdef AHC_DEBUG
|
|
{ "debug", &ahc_debug },
|
|
#endif
|
|
{ "reverse_scan", &aic7xxx_reverse_scan },
|
|
{ "no_probe", &aic7xxx_probe_eisa_vl },
|
|
{ "probe_eisa_vl", &aic7xxx_probe_eisa_vl },
|
|
{ "periodic_otag", &aic7xxx_periodic_otag },
|
|
{ "pci_parity", &aic7xxx_pci_parity },
|
|
{ "seltime", &aic7xxx_seltime },
|
|
{ "tag_info", NULL },
|
|
{ "global_tag_depth", NULL },
|
|
{ "dv", NULL }
|
|
};
|
|
|
|
end = strchr(s, '\0');
|
|
|
|
/*
|
|
* XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
|
|
* will never be 0 in this case.
|
|
*/
|
|
n = 0;
|
|
|
|
while ((p = strsep(&s, ",.")) != NULL) {
|
|
if (*p == '\0')
|
|
continue;
|
|
for (i = 0; i < NUM_ELEMENTS(options); i++) {
|
|
|
|
n = strlen(options[i].name);
|
|
if (strncmp(options[i].name, p, n) == 0)
|
|
break;
|
|
}
|
|
if (i == NUM_ELEMENTS(options))
|
|
continue;
|
|
|
|
if (strncmp(p, "global_tag_depth", n) == 0) {
|
|
ahc_linux_setup_tag_info_global(p + n);
|
|
} else if (strncmp(p, "tag_info", n) == 0) {
|
|
s = aic_parse_brace_option("tag_info", p + n, end,
|
|
2, ahc_linux_setup_tag_info, 0);
|
|
} else if (strncmp(p, "dv", n) == 0) {
|
|
s = aic_parse_brace_option("dv", p + n, end, 1,
|
|
ahc_linux_setup_dv, 0);
|
|
} else if (p[n] == ':') {
|
|
*(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
|
|
} else if (strncmp(p, "verbose", n) == 0) {
|
|
*(options[i].flag) = 1;
|
|
} else {
|
|
*(options[i].flag) ^= 0xFFFFFFFF;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
__setup("aic7xxx=", aic7xxx_setup);
|
|
|
|
uint32_t aic7xxx_verbose;
|
|
|
|
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;
|
|
u_int targ_offset;
|
|
|
|
template->name = ahc->description;
|
|
host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
|
|
if (host == NULL)
|
|
return (ENOMEM);
|
|
|
|
*((struct ahc_softc **)host->hostdata) = ahc;
|
|
ahc_lock(ahc, &s);
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
|
|
scsi_assign_lock(host, &ahc->platform_data->spin_lock);
|
|
#elif AHC_SCSI_HAS_HOST_LOCK != 0
|
|
host->lock = &ahc->platform_data->spin_lock;
|
|
#endif
|
|
ahc->platform_data->host = host;
|
|
host->can_queue = AHC_MAX_QUEUE;
|
|
host->cmd_per_lun = 2;
|
|
/* 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;
|
|
host->sg_tablesize = AHC_NSEG;
|
|
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(2,5,0)
|
|
scsi_set_pci_device(host, ahc->dev_softc);
|
|
#endif
|
|
ahc_linux_initialize_scsi_bus(ahc);
|
|
ahc_unlock(ahc, &s);
|
|
ahc->platform_data->dv_pid = kernel_thread(ahc_linux_dv_thread, ahc, 0);
|
|
ahc_lock(ahc, &s);
|
|
if (ahc->platform_data->dv_pid < 0) {
|
|
printf("%s: Failed to create DV thread, error= %d\n",
|
|
ahc_name(ahc), ahc->platform_data->dv_pid);
|
|
return (-ahc->platform_data->dv_pid);
|
|
}
|
|
/*
|
|
* Initially allocate *all* of our linux target objects
|
|
* so that the DV thread will scan them all in parallel
|
|
* just after driver initialization. Any device that
|
|
* does not exist will have its target object destroyed
|
|
* by the selection timeout handler. In the case of a
|
|
* device that appears after the initial DV scan, async
|
|
* negotiation will occur for the first command, and DV
|
|
* will comence should that first command be successful.
|
|
*/
|
|
for (targ_offset = 0;
|
|
targ_offset < host->max_id * (host->max_channel + 1);
|
|
targ_offset++) {
|
|
u_int channel;
|
|
u_int target;
|
|
|
|
channel = 0;
|
|
target = targ_offset;
|
|
if (target > 7
|
|
&& (ahc->features & AHC_TWIN) != 0) {
|
|
channel = 1;
|
|
target &= 0x7;
|
|
}
|
|
/*
|
|
* Skip our own ID. Some Compaq/HP storage devices
|
|
* have enclosure management devices that respond to
|
|
* single bit selection (i.e. selecting ourselves).
|
|
* It is expected that either an external application
|
|
* or a modified kernel will be used to probe this
|
|
* ID if it is appropriate. To accommodate these
|
|
* installations, ahc_linux_alloc_target() will allocate
|
|
* for our ID if asked to do so.
|
|
*/
|
|
if ((channel == 0 && target == ahc->our_id)
|
|
|| (channel == 1 && target == ahc->our_id_b))
|
|
continue;
|
|
|
|
ahc_linux_alloc_target(ahc, channel, target);
|
|
}
|
|
ahc_intr_enable(ahc, TRUE);
|
|
ahc_linux_start_dv(ahc);
|
|
ahc_unlock(ahc, &s);
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
|
|
scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */
|
|
scsi_scan_host(host);
|
|
#endif
|
|
return (0);
|
|
}
|
|
|
|
uint64_t
|
|
ahc_linux_get_memsize(void)
|
|
{
|
|
struct sysinfo si;
|
|
|
|
si_meminfo(&si);
|
|
return ((uint64_t)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(void)
|
|
{
|
|
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;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Force negotiation to async for all targets that
|
|
* will not see an initial bus reset.
|
|
*/
|
|
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);
|
|
ahc_compile_devinfo(&devinfo, our_id, target_id,
|
|
CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
|
|
ahc_update_neg_request(ahc, &devinfo, tstate,
|
|
tinfo, AHC_NEG_ALWAYS);
|
|
}
|
|
/* Give the bus some time to recover */
|
|
if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
|
|
ahc_linux_freeze_simq(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_simq;
|
|
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);
|
|
init_timer(&ahc->platform_data->completeq_timer);
|
|
ahc->platform_data->completeq_timer.data = (u_long)ahc;
|
|
ahc->platform_data->completeq_timer.function =
|
|
(ahc_linux_callback_t *)ahc_linux_thread_run_complete_queue;
|
|
init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
|
|
init_MUTEX_LOCKED(&ahc->platform_data->dv_sem);
|
|
init_MUTEX_LOCKED(&ahc->platform_data->dv_cmd_sem);
|
|
tasklet_init(&ahc->platform_data->runq_tasklet, ahc_runq_tasklet,
|
|
(unsigned long)ahc);
|
|
ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
|
|
ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
|
|
if (aic7xxx_pci_parity == 0)
|
|
ahc->flags |= AHC_DISABLE_PCI_PERR;
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
ahc_platform_free(struct ahc_softc *ahc)
|
|
{
|
|
struct ahc_linux_target *targ;
|
|
struct ahc_linux_device *dev;
|
|
int i, j;
|
|
|
|
if (ahc->platform_data != NULL) {
|
|
del_timer_sync(&ahc->platform_data->completeq_timer);
|
|
ahc_linux_kill_dv_thread(ahc);
|
|
tasklet_kill(&ahc->platform_data->runq_tasklet);
|
|
if (ahc->platform_data->host != NULL) {
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
|
|
scsi_remove_host(ahc->platform_data->host);
|
|
#endif
|
|
scsi_host_put(ahc->platform_data->host);
|
|
}
|
|
|
|
/* destroy all of the device and target objects */
|
|
for (i = 0; i < AHC_NUM_TARGETS; i++) {
|
|
targ = ahc->platform_data->targets[i];
|
|
if (targ != NULL) {
|
|
/* Keep target around through the loop. */
|
|
targ->refcount++;
|
|
for (j = 0; j < AHC_NUM_LUNS; j++) {
|
|
|
|
if (targ->devices[j] == NULL)
|
|
continue;
|
|
dev = targ->devices[j];
|
|
ahc_linux_free_device(ahc, dev);
|
|
}
|
|
/*
|
|
* Forcibly free the target now that
|
|
* all devices are gone.
|
|
*/
|
|
ahc_linux_free_target(ahc, targ);
|
|
}
|
|
}
|
|
|
|
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) {
|
|
iounmap(ahc->bsh.maddr);
|
|
release_mem_region(ahc->platform_data->mem_busaddr,
|
|
0x1000);
|
|
}
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
|
|
/*
|
|
* In 2.4 we detach from the scsi midlayer before the PCI
|
|
* layer invokes our remove callback. No per-instance
|
|
* detach is provided, so we must reach inside the PCI
|
|
* subsystem's internals and detach our driver manually.
|
|
*/
|
|
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);
|
|
switch (alg) {
|
|
default:
|
|
case AHC_QUEUE_NONE:
|
|
now_queuing = 0;
|
|
break;
|
|
case AHC_QUEUE_BASIC:
|
|
now_queuing = AHC_DEV_Q_BASIC;
|
|
break;
|
|
case AHC_QUEUE_TAGGED:
|
|
now_queuing = AHC_DEV_Q_TAGGED;
|
|
break;
|
|
}
|
|
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 (dev->maxtags == 0) {
|
|
/*
|
|
* Queueing is disabled by the user.
|
|
*/
|
|
dev->openings = 1;
|
|
} else 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;
|
|
}
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
|
|
if (dev->scsi_device != NULL) {
|
|
switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
|
|
case AHC_DEV_Q_BASIC:
|
|
scsi_adjust_queue_depth(dev->scsi_device,
|
|
MSG_SIMPLE_TASK,
|
|
dev->openings + dev->active);
|
|
break;
|
|
case AHC_DEV_Q_TAGGED:
|
|
scsi_adjust_queue_depth(dev->scsi_device,
|
|
MSG_ORDERED_TASK,
|
|
dev->openings + dev->active);
|
|
break;
|
|
default:
|
|
/*
|
|
* 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.
|
|
*/
|
|
scsi_adjust_queue_depth(dev->scsi_device,
|
|
/*NON-TAGGED*/0,
|
|
/*queue depth*/2);
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc)
|
|
{
|
|
u_long flags;
|
|
|
|
ahc_lock(ahc, &flags);
|
|
del_timer(&ahc->platform_data->completeq_timer);
|
|
ahc->platform_data->flags &= ~AHC_RUN_CMPLT_Q_TIMER;
|
|
ahc_linux_run_complete_queue(ahc);
|
|
ahc_unlock(ahc, &flags);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_start_dv(struct ahc_softc *ahc)
|
|
{
|
|
|
|
/*
|
|
* Freeze the simq and signal ahc_linux_queue to not let any
|
|
* more commands through.
|
|
*/
|
|
if ((ahc->platform_data->flags & AHC_DV_ACTIVE) == 0) {
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV)
|
|
printf("%s: Waking DV thread\n", ahc_name(ahc));
|
|
#endif
|
|
|
|
ahc->platform_data->flags |= AHC_DV_ACTIVE;
|
|
ahc_linux_freeze_simq(ahc);
|
|
|
|
/* Wake up the DV kthread */
|
|
up(&ahc->platform_data->dv_sem);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ahc_linux_kill_dv_thread(struct ahc_softc *ahc)
|
|
{
|
|
u_long s;
|
|
|
|
ahc_lock(ahc, &s);
|
|
if (ahc->platform_data->dv_pid != 0) {
|
|
ahc->platform_data->flags |= AHC_DV_SHUTDOWN;
|
|
ahc_unlock(ahc, &s);
|
|
up(&ahc->platform_data->dv_sem);
|
|
|
|
/*
|
|
* Use the eh_sem as an indicator that the
|
|
* dv thread is exiting. Note that the dv
|
|
* thread must still return after performing
|
|
* the up on our semaphore before it has
|
|
* completely exited this module. Unfortunately,
|
|
* there seems to be no easy way to wait for the
|
|
* exit of a thread for which you are not the
|
|
* parent (dv threads are parented by init).
|
|
* Cross your fingers...
|
|
*/
|
|
down(&ahc->platform_data->eh_sem);
|
|
|
|
/*
|
|
* Mark the dv thread as already dead. This
|
|
* avoids attempting to kill it a second time.
|
|
* This is necessary because we must kill the
|
|
* DV thread before calling ahc_free() in the
|
|
* module shutdown case to avoid bogus locking
|
|
* in the SCSI mid-layer, but we ahc_free() is
|
|
* called without killing the DV thread in the
|
|
* instance detach case, so ahc_platform_free()
|
|
* calls us again to verify that the DV thread
|
|
* is dead.
|
|
*/
|
|
ahc->platform_data->dv_pid = 0;
|
|
} else {
|
|
ahc_unlock(ahc, &s);
|
|
}
|
|
}
|
|
|
|
static int
|
|
ahc_linux_dv_thread(void *data)
|
|
{
|
|
struct ahc_softc *ahc;
|
|
int target;
|
|
u_long s;
|
|
|
|
ahc = (struct ahc_softc *)data;
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV)
|
|
printf("Launching DV Thread\n");
|
|
#endif
|
|
|
|
/*
|
|
* Complete thread creation.
|
|
*/
|
|
lock_kernel();
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
|
|
/*
|
|
* Don't care about any signals.
|
|
*/
|
|
siginitsetinv(¤t->blocked, 0);
|
|
|
|
daemonize();
|
|
sprintf(current->comm, "ahc_dv_%d", ahc->unit);
|
|
#else
|
|
daemonize("ahc_dv_%d", ahc->unit);
|
|
current->flags |= PF_FREEZE;
|
|
#endif
|
|
unlock_kernel();
|
|
|
|
while (1) {
|
|
/*
|
|
* Use down_interruptible() rather than down() to
|
|
* avoid inclusion in the load average.
|
|
*/
|
|
down_interruptible(&ahc->platform_data->dv_sem);
|
|
|
|
/* Check to see if we've been signaled to exit */
|
|
ahc_lock(ahc, &s);
|
|
if ((ahc->platform_data->flags & AHC_DV_SHUTDOWN) != 0) {
|
|
ahc_unlock(ahc, &s);
|
|
break;
|
|
}
|
|
ahc_unlock(ahc, &s);
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV)
|
|
printf("%s: Beginning Domain Validation\n",
|
|
ahc_name(ahc));
|
|
#endif
|
|
|
|
/*
|
|
* Wait for any pending commands to drain before proceeding.
|
|
*/
|
|
ahc_lock(ahc, &s);
|
|
while (LIST_FIRST(&ahc->pending_scbs) != NULL) {
|
|
ahc->platform_data->flags |= AHC_DV_WAIT_SIMQ_EMPTY;
|
|
ahc_unlock(ahc, &s);
|
|
down_interruptible(&ahc->platform_data->dv_sem);
|
|
ahc_lock(ahc, &s);
|
|
}
|
|
|
|
/*
|
|
* Wait for the SIMQ to be released so that DV is the
|
|
* only reason the queue is frozen.
|
|
*/
|
|
while (AHC_DV_SIMQ_FROZEN(ahc) == 0) {
|
|
ahc->platform_data->flags |= AHC_DV_WAIT_SIMQ_RELEASE;
|
|
ahc_unlock(ahc, &s);
|
|
down_interruptible(&ahc->platform_data->dv_sem);
|
|
ahc_lock(ahc, &s);
|
|
}
|
|
ahc_unlock(ahc, &s);
|
|
|
|
for (target = 0; target < AHC_NUM_TARGETS; target++)
|
|
ahc_linux_dv_target(ahc, target);
|
|
|
|
ahc_lock(ahc, &s);
|
|
ahc->platform_data->flags &= ~AHC_DV_ACTIVE;
|
|
ahc_unlock(ahc, &s);
|
|
|
|
/*
|
|
* Release the SIMQ so that normal commands are
|
|
* allowed to continue on the bus.
|
|
*/
|
|
ahc_linux_release_simq((u_long)ahc);
|
|
}
|
|
up(&ahc->platform_data->eh_sem);
|
|
return (0);
|
|
}
|
|
|
|
#define AHC_LINUX_DV_INQ_SHORT_LEN 36
|
|
#define AHC_LINUX_DV_INQ_LEN 256
|
|
#define AHC_LINUX_DV_TIMEOUT (HZ / 4)
|
|
|
|
#define AHC_SET_DV_STATE(ahc, targ, newstate) \
|
|
ahc_set_dv_state(ahc, targ, newstate, __LINE__)
|
|
|
|
static __inline void
|
|
ahc_set_dv_state(struct ahc_softc *ahc, struct ahc_linux_target *targ,
|
|
ahc_dv_state newstate, u_int line)
|
|
{
|
|
ahc_dv_state oldstate;
|
|
|
|
oldstate = targ->dv_state;
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV)
|
|
printf("%s:%d: Going from state %d to state %d\n",
|
|
ahc_name(ahc), line, oldstate, newstate);
|
|
#endif
|
|
|
|
if (oldstate == newstate)
|
|
targ->dv_state_retry++;
|
|
else
|
|
targ->dv_state_retry = 0;
|
|
targ->dv_state = newstate;
|
|
}
|
|
|
|
static void
|
|
ahc_linux_dv_target(struct ahc_softc *ahc, u_int target_offset)
|
|
{
|
|
struct ahc_devinfo devinfo;
|
|
struct ahc_linux_target *targ;
|
|
struct scsi_cmnd *cmd;
|
|
struct scsi_device *scsi_dev;
|
|
struct scsi_sense_data *sense;
|
|
uint8_t *buffer;
|
|
u_long s;
|
|
u_int timeout;
|
|
int echo_size;
|
|
|
|
sense = NULL;
|
|
buffer = NULL;
|
|
echo_size = 0;
|
|
ahc_lock(ahc, &s);
|
|
targ = ahc->platform_data->targets[target_offset];
|
|
if (targ == NULL || (targ->flags & AHC_DV_REQUIRED) == 0) {
|
|
ahc_unlock(ahc, &s);
|
|
return;
|
|
}
|
|
ahc_compile_devinfo(&devinfo,
|
|
targ->channel == 0 ? ahc->our_id : ahc->our_id_b,
|
|
targ->target, /*lun*/0, targ->channel + 'A',
|
|
ROLE_INITIATOR);
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, &devinfo);
|
|
printf("Performing DV\n");
|
|
}
|
|
#endif
|
|
|
|
ahc_unlock(ahc, &s);
|
|
|
|
cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK);
|
|
scsi_dev = malloc(sizeof(struct scsi_device), M_DEVBUF, M_WAITOK);
|
|
scsi_dev->host = ahc->platform_data->host;
|
|
scsi_dev->id = devinfo.target;
|
|
scsi_dev->lun = devinfo.lun;
|
|
scsi_dev->channel = devinfo.channel - 'A';
|
|
ahc->platform_data->dv_scsi_dev = scsi_dev;
|
|
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_INQ_SHORT_ASYNC);
|
|
|
|
while (targ->dv_state != AHC_DV_STATE_EXIT) {
|
|
timeout = AHC_LINUX_DV_TIMEOUT;
|
|
switch (targ->dv_state) {
|
|
case AHC_DV_STATE_INQ_SHORT_ASYNC:
|
|
case AHC_DV_STATE_INQ_ASYNC:
|
|
case AHC_DV_STATE_INQ_ASYNC_VERIFY:
|
|
/*
|
|
* Set things to async narrow to reduce the
|
|
* chance that the INQ will fail.
|
|
*/
|
|
ahc_lock(ahc, &s);
|
|
ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
|
|
AHC_TRANS_GOAL, /*paused*/FALSE);
|
|
ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
|
|
AHC_TRANS_GOAL, /*paused*/FALSE);
|
|
ahc_unlock(ahc, &s);
|
|
timeout = 10 * HZ;
|
|
targ->flags &= ~AHC_INQ_VALID;
|
|
/* FALLTHROUGH */
|
|
case AHC_DV_STATE_INQ_VERIFY:
|
|
{
|
|
u_int inq_len;
|
|
|
|
if (targ->dv_state == AHC_DV_STATE_INQ_SHORT_ASYNC)
|
|
inq_len = AHC_LINUX_DV_INQ_SHORT_LEN;
|
|
else
|
|
inq_len = targ->inq_data->additional_length + 5;
|
|
ahc_linux_dv_inq(ahc, cmd, &devinfo, targ, inq_len);
|
|
break;
|
|
}
|
|
case AHC_DV_STATE_TUR:
|
|
case AHC_DV_STATE_BUSY:
|
|
timeout = 5 * HZ;
|
|
ahc_linux_dv_tur(ahc, cmd, &devinfo);
|
|
break;
|
|
case AHC_DV_STATE_REBD:
|
|
ahc_linux_dv_rebd(ahc, cmd, &devinfo, targ);
|
|
break;
|
|
case AHC_DV_STATE_WEB:
|
|
ahc_linux_dv_web(ahc, cmd, &devinfo, targ);
|
|
break;
|
|
|
|
case AHC_DV_STATE_REB:
|
|
ahc_linux_dv_reb(ahc, cmd, &devinfo, targ);
|
|
break;
|
|
|
|
case AHC_DV_STATE_SU:
|
|
ahc_linux_dv_su(ahc, cmd, &devinfo, targ);
|
|
timeout = 50 * HZ;
|
|
break;
|
|
|
|
default:
|
|
ahc_print_devinfo(ahc, &devinfo);
|
|
printf("Unknown DV state %d\n", targ->dv_state);
|
|
goto out;
|
|
}
|
|
|
|
/* Queue the command and wait for it to complete */
|
|
/* Abuse eh_timeout in the scsi_cmnd struct for our purposes */
|
|
init_timer(&cmd->eh_timeout);
|
|
#ifdef AHC_DEBUG
|
|
if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
|
|
/*
|
|
* All of the printfs during negotiation
|
|
* really slow down the negotiation.
|
|
* Add a bit of time just to be safe.
|
|
*/
|
|
timeout += HZ;
|
|
#endif
|
|
scsi_add_timer(cmd, timeout, ahc_linux_dv_timeout);
|
|
/*
|
|
* In 2.5.X, it is assumed that all calls from the
|
|
* "midlayer" (which we are emulating) will have the
|
|
* ahc host lock held. For other kernels, the
|
|
* io_request_lock must be held.
|
|
*/
|
|
#if AHC_SCSI_HAS_HOST_LOCK != 0
|
|
ahc_lock(ahc, &s);
|
|
#else
|
|
spin_lock_irqsave(&io_request_lock, s);
|
|
#endif
|
|
ahc_linux_queue(cmd, ahc_linux_dv_complete);
|
|
#if AHC_SCSI_HAS_HOST_LOCK != 0
|
|
ahc_unlock(ahc, &s);
|
|
#else
|
|
spin_unlock_irqrestore(&io_request_lock, s);
|
|
#endif
|
|
down_interruptible(&ahc->platform_data->dv_cmd_sem);
|
|
/*
|
|
* Wait for the SIMQ to be released so that DV is the
|
|
* only reason the queue is frozen.
|
|
*/
|
|
ahc_lock(ahc, &s);
|
|
while (AHC_DV_SIMQ_FROZEN(ahc) == 0) {
|
|
ahc->platform_data->flags |= AHC_DV_WAIT_SIMQ_RELEASE;
|
|
ahc_unlock(ahc, &s);
|
|
down_interruptible(&ahc->platform_data->dv_sem);
|
|
ahc_lock(ahc, &s);
|
|
}
|
|
ahc_unlock(ahc, &s);
|
|
|
|
ahc_linux_dv_transition(ahc, cmd, &devinfo, targ);
|
|
}
|
|
|
|
out:
|
|
if ((targ->flags & AHC_INQ_VALID) != 0
|
|
&& ahc_linux_get_device(ahc, devinfo.channel - 'A',
|
|
devinfo.target, devinfo.lun,
|
|
/*alloc*/FALSE) == NULL) {
|
|
/*
|
|
* The DV state machine failed to configure this device.
|
|
* This is normal if DV is disabled. Since we have inquiry
|
|
* data, filter it and use the "optimistic" negotiation
|
|
* parameters found in the inquiry string.
|
|
*/
|
|
ahc_linux_filter_inquiry(ahc, &devinfo);
|
|
if ((targ->flags & (AHC_BASIC_DV|AHC_ENHANCED_DV)) != 0) {
|
|
ahc_print_devinfo(ahc, &devinfo);
|
|
printf("DV failed to configure device. "
|
|
"Please file a bug report against "
|
|
"this driver.\n");
|
|
}
|
|
}
|
|
|
|
if (cmd != NULL)
|
|
free(cmd, M_DEVBUF);
|
|
|
|
if (ahc->platform_data->dv_scsi_dev != NULL) {
|
|
free(ahc->platform_data->dv_scsi_dev, M_DEVBUF);
|
|
ahc->platform_data->dv_scsi_dev = NULL;
|
|
}
|
|
|
|
ahc_lock(ahc, &s);
|
|
if (targ->dv_buffer != NULL) {
|
|
free(targ->dv_buffer, M_DEVBUF);
|
|
targ->dv_buffer = NULL;
|
|
}
|
|
if (targ->dv_buffer1 != NULL) {
|
|
free(targ->dv_buffer1, M_DEVBUF);
|
|
targ->dv_buffer1 = NULL;
|
|
}
|
|
targ->flags &= ~AHC_DV_REQUIRED;
|
|
if (targ->refcount == 0)
|
|
ahc_linux_free_target(ahc, targ);
|
|
ahc_unlock(ahc, &s);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_dv_transition(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo,
|
|
struct ahc_linux_target *targ)
|
|
{
|
|
u_int32_t status;
|
|
|
|
status = aic_error_action(cmd, targ->inq_data,
|
|
ahc_cmd_get_transaction_status(cmd),
|
|
ahc_cmd_get_scsi_status(cmd));
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("Entering ahc_linux_dv_transition, state= %d, "
|
|
"status= 0x%x, cmd->result= 0x%x\n", targ->dv_state,
|
|
status, cmd->result);
|
|
}
|
|
#endif
|
|
|
|
switch (targ->dv_state) {
|
|
case AHC_DV_STATE_INQ_SHORT_ASYNC:
|
|
case AHC_DV_STATE_INQ_ASYNC:
|
|
switch (status & SS_MASK) {
|
|
case SS_NOP:
|
|
{
|
|
AHC_SET_DV_STATE(ahc, targ, targ->dv_state+1);
|
|
break;
|
|
}
|
|
case SS_INQ_REFRESH:
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_INQ_SHORT_ASYNC);
|
|
break;
|
|
case SS_TUR:
|
|
case SS_RETRY:
|
|
AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
|
|
if (ahc_cmd_get_transaction_status(cmd)
|
|
== CAM_REQUEUE_REQ)
|
|
targ->dv_state_retry--;
|
|
if ((status & SS_ERRMASK) == EBUSY)
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_BUSY);
|
|
if (targ->dv_state_retry < 10)
|
|
break;
|
|
/* FALLTHROUGH */
|
|
default:
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("Failed DV inquiry, skipping\n");
|
|
}
|
|
#endif
|
|
break;
|
|
}
|
|
break;
|
|
case AHC_DV_STATE_INQ_ASYNC_VERIFY:
|
|
switch (status & SS_MASK) {
|
|
case SS_NOP:
|
|
{
|
|
u_int xportflags;
|
|
u_int spi3data;
|
|
|
|
if (memcmp(targ->inq_data, targ->dv_buffer,
|
|
AHC_LINUX_DV_INQ_LEN) != 0) {
|
|
/*
|
|
* Inquiry data must have changed.
|
|
* Try from the top again.
|
|
*/
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_INQ_SHORT_ASYNC);
|
|
break;
|
|
}
|
|
|
|
AHC_SET_DV_STATE(ahc, targ, targ->dv_state+1);
|
|
targ->flags |= AHC_INQ_VALID;
|
|
if (ahc_linux_user_dv_setting(ahc) == 0)
|
|
break;
|
|
|
|
xportflags = targ->inq_data->flags;
|
|
if ((xportflags & (SID_Sync|SID_WBus16)) == 0)
|
|
break;
|
|
|
|
spi3data = targ->inq_data->spi3data;
|
|
switch (spi3data & SID_SPI_CLOCK_DT_ST) {
|
|
default:
|
|
case SID_SPI_CLOCK_ST:
|
|
/* Assume only basic DV is supported. */
|
|
targ->flags |= AHC_BASIC_DV;
|
|
break;
|
|
case SID_SPI_CLOCK_DT:
|
|
case SID_SPI_CLOCK_DT_ST:
|
|
targ->flags |= AHC_ENHANCED_DV;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
case SS_INQ_REFRESH:
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_INQ_SHORT_ASYNC);
|
|
break;
|
|
case SS_TUR:
|
|
case SS_RETRY:
|
|
AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
|
|
if (ahc_cmd_get_transaction_status(cmd)
|
|
== CAM_REQUEUE_REQ)
|
|
targ->dv_state_retry--;
|
|
|
|
if ((status & SS_ERRMASK) == EBUSY)
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_BUSY);
|
|
if (targ->dv_state_retry < 10)
|
|
break;
|
|
/* FALLTHROUGH */
|
|
default:
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("Failed DV inquiry, skipping\n");
|
|
}
|
|
#endif
|
|
break;
|
|
}
|
|
break;
|
|
case AHC_DV_STATE_INQ_VERIFY:
|
|
switch (status & SS_MASK) {
|
|
case SS_NOP:
|
|
{
|
|
|
|
if (memcmp(targ->inq_data, targ->dv_buffer,
|
|
AHC_LINUX_DV_INQ_LEN) == 0) {
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
break;
|
|
}
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
int i;
|
|
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("Inquiry buffer mismatch:");
|
|
for (i = 0; i < AHC_LINUX_DV_INQ_LEN; i++) {
|
|
if ((i & 0xF) == 0)
|
|
printf("\n ");
|
|
printf("0x%x:0x0%x ",
|
|
((uint8_t *)targ->inq_data)[i],
|
|
targ->dv_buffer[i]);
|
|
}
|
|
printf("\n");
|
|
}
|
|
#endif
|
|
|
|
if (ahc_linux_fallback(ahc, devinfo) != 0) {
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
break;
|
|
}
|
|
/*
|
|
* Do not count "falling back"
|
|
* against our retries.
|
|
*/
|
|
targ->dv_state_retry = 0;
|
|
AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
|
|
break;
|
|
}
|
|
case SS_INQ_REFRESH:
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_INQ_SHORT_ASYNC);
|
|
break;
|
|
case SS_TUR:
|
|
case SS_RETRY:
|
|
AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
|
|
if (ahc_cmd_get_transaction_status(cmd)
|
|
== CAM_REQUEUE_REQ) {
|
|
targ->dv_state_retry--;
|
|
} else if ((status & SSQ_FALLBACK) != 0) {
|
|
if (ahc_linux_fallback(ahc, devinfo) != 0) {
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_EXIT);
|
|
break;
|
|
}
|
|
/*
|
|
* Do not count "falling back"
|
|
* against our retries.
|
|
*/
|
|
targ->dv_state_retry = 0;
|
|
} else if ((status & SS_ERRMASK) == EBUSY)
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_BUSY);
|
|
if (targ->dv_state_retry < 10)
|
|
break;
|
|
/* FALLTHROUGH */
|
|
default:
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("Failed DV inquiry, skipping\n");
|
|
}
|
|
#endif
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case AHC_DV_STATE_TUR:
|
|
switch (status & SS_MASK) {
|
|
case SS_NOP:
|
|
if ((targ->flags & AHC_BASIC_DV) != 0) {
|
|
ahc_linux_filter_inquiry(ahc, devinfo);
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_INQ_VERIFY);
|
|
} else if ((targ->flags & AHC_ENHANCED_DV) != 0) {
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_REBD);
|
|
} else {
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
}
|
|
break;
|
|
case SS_RETRY:
|
|
case SS_TUR:
|
|
if ((status & SS_ERRMASK) == EBUSY) {
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_BUSY);
|
|
break;
|
|
}
|
|
AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
|
|
if (ahc_cmd_get_transaction_status(cmd)
|
|
== CAM_REQUEUE_REQ) {
|
|
targ->dv_state_retry--;
|
|
} else if ((status & SSQ_FALLBACK) != 0) {
|
|
if (ahc_linux_fallback(ahc, devinfo) != 0) {
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_EXIT);
|
|
break;
|
|
}
|
|
/*
|
|
* Do not count "falling back"
|
|
* against our retries.
|
|
*/
|
|
targ->dv_state_retry = 0;
|
|
}
|
|
if (targ->dv_state_retry >= 10) {
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("DV TUR reties exhausted\n");
|
|
}
|
|
#endif
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
break;
|
|
}
|
|
if (status & SSQ_DELAY)
|
|
ssleep(1);
|
|
|
|
break;
|
|
case SS_START:
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_SU);
|
|
break;
|
|
case SS_INQ_REFRESH:
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_INQ_SHORT_ASYNC);
|
|
break;
|
|
default:
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case AHC_DV_STATE_REBD:
|
|
switch (status & SS_MASK) {
|
|
case SS_NOP:
|
|
{
|
|
uint32_t echo_size;
|
|
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_WEB);
|
|
echo_size = scsi_3btoul(&targ->dv_buffer[1]);
|
|
echo_size &= 0x1FFF;
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("Echo buffer size= %d\n", echo_size);
|
|
}
|
|
#endif
|
|
if (echo_size == 0) {
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
break;
|
|
}
|
|
|
|
/* Generate the buffer pattern */
|
|
targ->dv_echo_size = echo_size;
|
|
ahc_linux_generate_dv_pattern(targ);
|
|
/*
|
|
* Setup initial negotiation values.
|
|
*/
|
|
ahc_linux_filter_inquiry(ahc, devinfo);
|
|
break;
|
|
}
|
|
case SS_INQ_REFRESH:
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_INQ_SHORT_ASYNC);
|
|
break;
|
|
case SS_RETRY:
|
|
AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
|
|
if (ahc_cmd_get_transaction_status(cmd)
|
|
== CAM_REQUEUE_REQ)
|
|
targ->dv_state_retry--;
|
|
if (targ->dv_state_retry <= 10)
|
|
break;
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("DV REBD reties exhausted\n");
|
|
}
|
|
#endif
|
|
/* FALLTHROUGH */
|
|
case SS_FATAL:
|
|
default:
|
|
/*
|
|
* Setup initial negotiation values
|
|
* and try level 1 DV.
|
|
*/
|
|
ahc_linux_filter_inquiry(ahc, devinfo);
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_INQ_VERIFY);
|
|
targ->dv_echo_size = 0;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case AHC_DV_STATE_WEB:
|
|
switch (status & SS_MASK) {
|
|
case SS_NOP:
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_REB);
|
|
break;
|
|
case SS_INQ_REFRESH:
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_INQ_SHORT_ASYNC);
|
|
break;
|
|
case SS_RETRY:
|
|
AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
|
|
if (ahc_cmd_get_transaction_status(cmd)
|
|
== CAM_REQUEUE_REQ) {
|
|
targ->dv_state_retry--;
|
|
} else if ((status & SSQ_FALLBACK) != 0) {
|
|
if (ahc_linux_fallback(ahc, devinfo) != 0) {
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_EXIT);
|
|
break;
|
|
}
|
|
/*
|
|
* Do not count "falling back"
|
|
* against our retries.
|
|
*/
|
|
targ->dv_state_retry = 0;
|
|
}
|
|
if (targ->dv_state_retry <= 10)
|
|
break;
|
|
/* FALLTHROUGH */
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("DV WEB reties exhausted\n");
|
|
}
|
|
#endif
|
|
default:
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case AHC_DV_STATE_REB:
|
|
switch (status & SS_MASK) {
|
|
case SS_NOP:
|
|
if (memcmp(targ->dv_buffer, targ->dv_buffer1,
|
|
targ->dv_echo_size) != 0) {
|
|
if (ahc_linux_fallback(ahc, devinfo) != 0)
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_EXIT);
|
|
else
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_WEB);
|
|
break;
|
|
}
|
|
|
|
if (targ->dv_buffer != NULL) {
|
|
free(targ->dv_buffer, M_DEVBUF);
|
|
targ->dv_buffer = NULL;
|
|
}
|
|
if (targ->dv_buffer1 != NULL) {
|
|
free(targ->dv_buffer1, M_DEVBUF);
|
|
targ->dv_buffer1 = NULL;
|
|
}
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
break;
|
|
case SS_INQ_REFRESH:
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_INQ_SHORT_ASYNC);
|
|
break;
|
|
case SS_RETRY:
|
|
AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
|
|
if (ahc_cmd_get_transaction_status(cmd)
|
|
== CAM_REQUEUE_REQ) {
|
|
targ->dv_state_retry--;
|
|
} else if ((status & SSQ_FALLBACK) != 0) {
|
|
if (ahc_linux_fallback(ahc, devinfo) != 0) {
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_EXIT);
|
|
break;
|
|
}
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_WEB);
|
|
}
|
|
if (targ->dv_state_retry <= 10) {
|
|
if ((status & (SSQ_DELAY_RANDOM|SSQ_DELAY))!= 0)
|
|
msleep(ahc->our_id*1000/10);
|
|
break;
|
|
}
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("DV REB reties exhausted\n");
|
|
}
|
|
#endif
|
|
/* FALLTHROUGH */
|
|
default:
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case AHC_DV_STATE_SU:
|
|
switch (status & SS_MASK) {
|
|
case SS_NOP:
|
|
case SS_INQ_REFRESH:
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_INQ_SHORT_ASYNC);
|
|
break;
|
|
default:
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case AHC_DV_STATE_BUSY:
|
|
switch (status & SS_MASK) {
|
|
case SS_NOP:
|
|
case SS_INQ_REFRESH:
|
|
AHC_SET_DV_STATE(ahc, targ,
|
|
AHC_DV_STATE_INQ_SHORT_ASYNC);
|
|
break;
|
|
case SS_TUR:
|
|
case SS_RETRY:
|
|
AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
|
|
if (ahc_cmd_get_transaction_status(cmd)
|
|
== CAM_REQUEUE_REQ) {
|
|
targ->dv_state_retry--;
|
|
} else if (targ->dv_state_retry < 60) {
|
|
if ((status & SSQ_DELAY) != 0)
|
|
ssleep(1);
|
|
} else {
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("DV BUSY reties exhausted\n");
|
|
}
|
|
#endif
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
}
|
|
break;
|
|
default:
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
printf("%s: Invalid DV completion state %d\n", ahc_name(ahc),
|
|
targ->dv_state);
|
|
AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
ahc_linux_dv_fill_cmd(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo)
|
|
{
|
|
memset(cmd, 0, sizeof(struct scsi_cmnd));
|
|
cmd->device = ahc->platform_data->dv_scsi_dev;
|
|
cmd->scsi_done = ahc_linux_dv_complete;
|
|
}
|
|
|
|
/*
|
|
* Synthesize an inquiry command. On the return trip, it'll be
|
|
* sniffed and the device transfer settings set for us.
|
|
*/
|
|
static void
|
|
ahc_linux_dv_inq(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo, struct ahc_linux_target *targ,
|
|
u_int request_length)
|
|
{
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("Sending INQ\n");
|
|
}
|
|
#endif
|
|
if (targ->inq_data == NULL)
|
|
targ->inq_data = malloc(AHC_LINUX_DV_INQ_LEN,
|
|
M_DEVBUF, M_WAITOK);
|
|
if (targ->dv_state > AHC_DV_STATE_INQ_ASYNC) {
|
|
if (targ->dv_buffer != NULL)
|
|
free(targ->dv_buffer, M_DEVBUF);
|
|
targ->dv_buffer = malloc(AHC_LINUX_DV_INQ_LEN,
|
|
M_DEVBUF, M_WAITOK);
|
|
}
|
|
|
|
ahc_linux_dv_fill_cmd(ahc, cmd, devinfo);
|
|
cmd->sc_data_direction = SCSI_DATA_READ;
|
|
cmd->cmd_len = 6;
|
|
cmd->cmnd[0] = INQUIRY;
|
|
cmd->cmnd[4] = request_length;
|
|
cmd->request_bufflen = request_length;
|
|
if (targ->dv_state > AHC_DV_STATE_INQ_ASYNC)
|
|
cmd->request_buffer = targ->dv_buffer;
|
|
else
|
|
cmd->request_buffer = targ->inq_data;
|
|
memset(cmd->request_buffer, 0, AHC_LINUX_DV_INQ_LEN);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_dv_tur(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo)
|
|
{
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("Sending TUR\n");
|
|
}
|
|
#endif
|
|
/* Do a TUR to clear out any non-fatal transitional state */
|
|
ahc_linux_dv_fill_cmd(ahc, cmd, devinfo);
|
|
cmd->sc_data_direction = SCSI_DATA_NONE;
|
|
cmd->cmd_len = 6;
|
|
cmd->cmnd[0] = TEST_UNIT_READY;
|
|
}
|
|
|
|
#define AHC_REBD_LEN 4
|
|
|
|
static void
|
|
ahc_linux_dv_rebd(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo, struct ahc_linux_target *targ)
|
|
{
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("Sending REBD\n");
|
|
}
|
|
#endif
|
|
if (targ->dv_buffer != NULL)
|
|
free(targ->dv_buffer, M_DEVBUF);
|
|
targ->dv_buffer = malloc(AHC_REBD_LEN, M_DEVBUF, M_WAITOK);
|
|
ahc_linux_dv_fill_cmd(ahc, cmd, devinfo);
|
|
cmd->sc_data_direction = SCSI_DATA_READ;
|
|
cmd->cmd_len = 10;
|
|
cmd->cmnd[0] = READ_BUFFER;
|
|
cmd->cmnd[1] = 0x0b;
|
|
scsi_ulto3b(AHC_REBD_LEN, &cmd->cmnd[6]);
|
|
cmd->request_bufflen = AHC_REBD_LEN;
|
|
cmd->underflow = cmd->request_bufflen;
|
|
cmd->request_buffer = targ->dv_buffer;
|
|
}
|
|
|
|
static void
|
|
ahc_linux_dv_web(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo, struct ahc_linux_target *targ)
|
|
{
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("Sending WEB\n");
|
|
}
|
|
#endif
|
|
ahc_linux_dv_fill_cmd(ahc, cmd, devinfo);
|
|
cmd->sc_data_direction = SCSI_DATA_WRITE;
|
|
cmd->cmd_len = 10;
|
|
cmd->cmnd[0] = WRITE_BUFFER;
|
|
cmd->cmnd[1] = 0x0a;
|
|
scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
|
|
cmd->request_bufflen = targ->dv_echo_size;
|
|
cmd->underflow = cmd->request_bufflen;
|
|
cmd->request_buffer = targ->dv_buffer;
|
|
}
|
|
|
|
static void
|
|
ahc_linux_dv_reb(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo, struct ahc_linux_target *targ)
|
|
{
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("Sending REB\n");
|
|
}
|
|
#endif
|
|
ahc_linux_dv_fill_cmd(ahc, cmd, devinfo);
|
|
cmd->sc_data_direction = SCSI_DATA_READ;
|
|
cmd->cmd_len = 10;
|
|
cmd->cmnd[0] = READ_BUFFER;
|
|
cmd->cmnd[1] = 0x0a;
|
|
scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
|
|
cmd->request_bufflen = targ->dv_echo_size;
|
|
cmd->underflow = cmd->request_bufflen;
|
|
cmd->request_buffer = targ->dv_buffer1;
|
|
}
|
|
|
|
static void
|
|
ahc_linux_dv_su(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
|
|
struct ahc_devinfo *devinfo,
|
|
struct ahc_linux_target *targ)
|
|
{
|
|
u_int le;
|
|
|
|
le = SID_IS_REMOVABLE(targ->inq_data) ? SSS_LOEJ : 0;
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("Sending SU\n");
|
|
}
|
|
#endif
|
|
ahc_linux_dv_fill_cmd(ahc, cmd, devinfo);
|
|
cmd->sc_data_direction = SCSI_DATA_NONE;
|
|
cmd->cmd_len = 6;
|
|
cmd->cmnd[0] = START_STOP_UNIT;
|
|
cmd->cmnd[4] = le | SSS_START;
|
|
}
|
|
|
|
static int
|
|
ahc_linux_fallback(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
|
|
{
|
|
struct ahc_linux_target *targ;
|
|
struct ahc_initiator_tinfo *tinfo;
|
|
struct ahc_transinfo *goal;
|
|
struct ahc_tmode_tstate *tstate;
|
|
struct ahc_syncrate *syncrate;
|
|
u_long s;
|
|
u_int width;
|
|
u_int period;
|
|
u_int offset;
|
|
u_int ppr_options;
|
|
u_int cur_speed;
|
|
u_int wide_speed;
|
|
u_int narrow_speed;
|
|
u_int fallback_speed;
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
ahc_print_devinfo(ahc, devinfo);
|
|
printf("Trying to fallback\n");
|
|
}
|
|
#endif
|
|
ahc_lock(ahc, &s);
|
|
targ = ahc->platform_data->targets[devinfo->target_offset];
|
|
tinfo = ahc_fetch_transinfo(ahc, devinfo->channel,
|
|
devinfo->our_scsiid,
|
|
devinfo->target, &tstate);
|
|
goal = &tinfo->goal;
|
|
width = goal->width;
|
|
period = goal->period;
|
|
offset = goal->offset;
|
|
ppr_options = goal->ppr_options;
|
|
if (offset == 0)
|
|
period = AHC_ASYNC_XFER_PERIOD;
|
|
if (targ->dv_next_narrow_period == 0)
|
|
targ->dv_next_narrow_period = MAX(period, AHC_SYNCRATE_ULTRA2);
|
|
if (targ->dv_next_wide_period == 0)
|
|
targ->dv_next_wide_period = period;
|
|
if (targ->dv_max_width == 0)
|
|
targ->dv_max_width = width;
|
|
if (targ->dv_max_ppr_options == 0)
|
|
targ->dv_max_ppr_options = ppr_options;
|
|
if (targ->dv_last_ppr_options == 0)
|
|
targ->dv_last_ppr_options = ppr_options;
|
|
|
|
cur_speed = aic_calc_speed(width, period, offset, AHC_SYNCRATE_MIN);
|
|
wide_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_16_BIT,
|
|
targ->dv_next_wide_period,
|
|
MAX_OFFSET,
|
|
AHC_SYNCRATE_MIN);
|
|
narrow_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_8_BIT,
|
|
targ->dv_next_narrow_period,
|
|
MAX_OFFSET,
|
|
AHC_SYNCRATE_MIN);
|
|
fallback_speed = aic_calc_speed(width, period+1, offset,
|
|
AHC_SYNCRATE_MIN);
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
printf("cur_speed= %d, wide_speed= %d, narrow_speed= %d, "
|
|
"fallback_speed= %d\n", cur_speed, wide_speed,
|
|
narrow_speed, fallback_speed);
|
|
}
|
|
#endif
|
|
|
|
if (cur_speed > 160000) {
|
|
/*
|
|
* Paced/DT/IU_REQ only transfer speeds. All we
|
|
* can do is fallback in terms of syncrate.
|
|
*/
|
|
period++;
|
|
} else if (cur_speed > 80000) {
|
|
if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
|
|
/*
|
|
* Try without IU_REQ as it may be confusing
|
|
* an expander.
|
|
*/
|
|
ppr_options &= ~MSG_EXT_PPR_IU_REQ;
|
|
} else {
|
|
/*
|
|
* Paced/DT only transfer speeds. All we
|
|
* can do is fallback in terms of syncrate.
|
|
*/
|
|
period++;
|
|
ppr_options = targ->dv_max_ppr_options;
|
|
}
|
|
} else if (cur_speed > 3300) {
|
|
|
|
/*
|
|
* In this range we the following
|
|
* options ordered from highest to
|
|
* lowest desireability:
|
|
*
|
|
* o Wide/DT
|
|
* o Wide/non-DT
|
|
* o Narrow at a potentally higher sync rate.
|
|
*
|
|
* All modes are tested with and without IU_REQ
|
|
* set since using IUs may confuse an expander.
|
|
*/
|
|
if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
|
|
|
|
ppr_options &= ~MSG_EXT_PPR_IU_REQ;
|
|
} else if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
|
|
/*
|
|
* Try going non-DT.
|
|
*/
|
|
ppr_options = targ->dv_max_ppr_options;
|
|
ppr_options &= ~MSG_EXT_PPR_DT_REQ;
|
|
} else if (targ->dv_last_ppr_options != 0) {
|
|
/*
|
|
* Try without QAS or any other PPR options.
|
|
* We may need a non-PPR message to work with
|
|
* an expander. We look at the "last PPR options"
|
|
* so we will perform this fallback even if the
|
|
* target responded to our PPR negotiation with
|
|
* no option bits set.
|
|
*/
|
|
ppr_options = 0;
|
|
} else if (width == MSG_EXT_WDTR_BUS_16_BIT) {
|
|
/*
|
|
* If the next narrow speed is greater than
|
|
* the next wide speed, fallback to narrow.
|
|
* Otherwise fallback to the next DT/Wide setting.
|
|
* The narrow async speed will always be smaller
|
|
* than the wide async speed, so handle this case
|
|
* specifically.
|
|
*/
|
|
ppr_options = targ->dv_max_ppr_options;
|
|
if (narrow_speed > fallback_speed
|
|
|| period >= AHC_ASYNC_XFER_PERIOD) {
|
|
targ->dv_next_wide_period = period+1;
|
|
width = MSG_EXT_WDTR_BUS_8_BIT;
|
|
period = targ->dv_next_narrow_period;
|
|
} else {
|
|
period++;
|
|
}
|
|
} else if ((ahc->features & AHC_WIDE) != 0
|
|
&& targ->dv_max_width != 0
|
|
&& wide_speed >= fallback_speed
|
|
&& (targ->dv_next_wide_period <= AHC_ASYNC_XFER_PERIOD
|
|
|| period >= AHC_ASYNC_XFER_PERIOD)) {
|
|
|
|
/*
|
|
* We are narrow. Try falling back
|
|
* to the next wide speed with
|
|
* all supported ppr options set.
|
|
*/
|
|
targ->dv_next_narrow_period = period+1;
|
|
width = MSG_EXT_WDTR_BUS_16_BIT;
|
|
period = targ->dv_next_wide_period;
|
|
ppr_options = targ->dv_max_ppr_options;
|
|
} else {
|
|
/* Only narrow fallback is allowed. */
|
|
period++;
|
|
ppr_options = targ->dv_max_ppr_options;
|
|
}
|
|
} else {
|
|
ahc_unlock(ahc, &s);
|
|
return (-1);
|
|
}
|
|
offset = MAX_OFFSET;
|
|
syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
|
|
AHC_SYNCRATE_DT);
|
|
ahc_set_width(ahc, devinfo, width, AHC_TRANS_GOAL, FALSE);
|
|
if (period == 0) {
|
|
period = 0;
|
|
offset = 0;
|
|
ppr_options = 0;
|
|
if (width == MSG_EXT_WDTR_BUS_8_BIT)
|
|
targ->dv_next_narrow_period = AHC_ASYNC_XFER_PERIOD;
|
|
else
|
|
targ->dv_next_wide_period = AHC_ASYNC_XFER_PERIOD;
|
|
}
|
|
ahc_set_syncrate(ahc, devinfo, syncrate, period, offset,
|
|
ppr_options, AHC_TRANS_GOAL, FALSE);
|
|
targ->dv_last_ppr_options = ppr_options;
|
|
ahc_unlock(ahc, &s);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_dv_timeout(struct scsi_cmnd *cmd)
|
|
{
|
|
struct ahc_softc *ahc;
|
|
struct scb *scb;
|
|
u_long flags;
|
|
|
|
ahc = *((struct ahc_softc **)cmd->device->host->hostdata);
|
|
ahc_lock(ahc, &flags);
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV) {
|
|
printf("%s: Timeout while doing DV command %x.\n",
|
|
ahc_name(ahc), cmd->cmnd[0]);
|
|
ahc_dump_card_state(ahc);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Guard against "done race". No action is
|
|
* required if we just completed.
|
|
*/
|
|
if ((scb = (struct scb *)cmd->host_scribble) == NULL) {
|
|
ahc_unlock(ahc, &flags);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Command has not completed. Mark this
|
|
* SCB as having failing status prior to
|
|
* resetting the bus, so we get the correct
|
|
* error code.
|
|
*/
|
|
if ((scb->flags & SCB_SENSE) != 0)
|
|
ahc_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
|
|
else
|
|
ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
|
|
ahc_reset_channel(ahc, cmd->device->channel + 'A', /*initiate*/TRUE);
|
|
|
|
/*
|
|
* Add a minimal bus settle delay for devices that are slow to
|
|
* respond after bus resets.
|
|
*/
|
|
ahc_linux_freeze_simq(ahc);
|
|
init_timer(&ahc->platform_data->reset_timer);
|
|
ahc->platform_data->reset_timer.data = (u_long)ahc;
|
|
ahc->platform_data->reset_timer.expires = jiffies + HZ / 2;
|
|
ahc->platform_data->reset_timer.function =
|
|
(ahc_linux_callback_t *)ahc_linux_release_simq;
|
|
add_timer(&ahc->platform_data->reset_timer);
|
|
if (ahc_linux_next_device_to_run(ahc) != NULL)
|
|
ahc_schedule_runq(ahc);
|
|
ahc_linux_run_complete_queue(ahc);
|
|
ahc_unlock(ahc, &flags);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_dv_complete(struct scsi_cmnd *cmd)
|
|
{
|
|
struct ahc_softc *ahc;
|
|
|
|
ahc = *((struct ahc_softc **)cmd->device->host->hostdata);
|
|
|
|
/* Delete the DV timer before it goes off! */
|
|
scsi_delete_timer(cmd);
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_DV)
|
|
printf("%s:%d:%d: Command completed, status= 0x%x\n",
|
|
ahc_name(ahc), cmd->device->channel,
|
|
cmd->device->id, cmd->result);
|
|
#endif
|
|
|
|
/* Wake up the state machine */
|
|
up(&ahc->platform_data->dv_cmd_sem);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_generate_dv_pattern(struct ahc_linux_target *targ)
|
|
{
|
|
uint16_t b;
|
|
u_int i;
|
|
u_int j;
|
|
|
|
if (targ->dv_buffer != NULL)
|
|
free(targ->dv_buffer, M_DEVBUF);
|
|
targ->dv_buffer = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
|
|
if (targ->dv_buffer1 != NULL)
|
|
free(targ->dv_buffer1, M_DEVBUF);
|
|
targ->dv_buffer1 = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
|
|
|
|
i = 0;
|
|
b = 0x0001;
|
|
for (j = 0 ; i < targ->dv_echo_size; j++) {
|
|
if (j < 32) {
|
|
/*
|
|
* 32bytes of sequential numbers.
|
|
*/
|
|
targ->dv_buffer[i++] = j & 0xff;
|
|
} else if (j < 48) {
|
|
/*
|
|
* 32bytes of repeating 0x0000, 0xffff.
|
|
*/
|
|
targ->dv_buffer[i++] = (j & 0x02) ? 0xff : 0x00;
|
|
} else if (j < 64) {
|
|
/*
|
|
* 32bytes of repeating 0x5555, 0xaaaa.
|
|
*/
|
|
targ->dv_buffer[i++] = (j & 0x02) ? 0xaa : 0x55;
|
|
} else {
|
|
/*
|
|
* Remaining buffer is filled with a repeating
|
|
* patter of:
|
|
*
|
|
* 0xffff
|
|
* ~0x0001 << shifted once in each loop.
|
|
*/
|
|
if (j & 0x02) {
|
|
if (j & 0x01) {
|
|
targ->dv_buffer[i++] = ~(b >> 8) & 0xff;
|
|
b <<= 1;
|
|
if (b == 0x0000)
|
|
b = 0x0001;
|
|
} else {
|
|
targ->dv_buffer[i++] = (~b & 0xff);
|
|
}
|
|
} else {
|
|
targ->dv_buffer[i++] = 0xff;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
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 (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
|
|
if (warned_user == 0) {
|
|
|
|
printf(KERN_WARNING
|
|
"aic7xxx: WARNING: Insufficient tag_info instances\n"
|
|
"aic7xxx: for installed controllers. Using defaults\n"
|
|
"aic7xxx: Please update the aic7xxx_tag_info array in\n"
|
|
"aic7xxx: the aic7xxx_osm..c source file.\n");
|
|
warned_user++;
|
|
}
|
|
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;
|
|
}
|
|
}
|
|
return (tags);
|
|
}
|
|
|
|
static u_int
|
|
ahc_linux_user_dv_setting(struct ahc_softc *ahc)
|
|
{
|
|
static int warned_user;
|
|
int dv;
|
|
|
|
if (ahc->unit >= NUM_ELEMENTS(aic7xxx_dv_settings)) {
|
|
if (warned_user == 0) {
|
|
|
|
printf(KERN_WARNING
|
|
"aic7xxx: WARNING: Insufficient dv settings instances\n"
|
|
"aic7xxx: for installed controllers. Using defaults\n"
|
|
"aic7xxx: Please update the aic7xxx_dv_settings array\n"
|
|
"aic7xxx: in the aic7xxx_osm.c source file.\n");
|
|
warned_user++;
|
|
}
|
|
dv = -1;
|
|
} else {
|
|
|
|
dv = aic7xxx_dv_settings[ahc->unit];
|
|
}
|
|
|
|
if (dv < 0) {
|
|
u_long s;
|
|
|
|
/*
|
|
* Apply the default.
|
|
*/
|
|
/*
|
|
* XXX - Enable DV on non-U160 controllers once it
|
|
* has been tested there.
|
|
*/
|
|
ahc_lock(ahc, &s);
|
|
dv = (ahc->features & AHC_DT);
|
|
if (ahc->seep_config != 0
|
|
&& ahc->seep_config->signature >= CFSIGNATURE2)
|
|
dv = (ahc->seep_config->adapter_control & CFENABLEDV);
|
|
ahc_unlock(ahc, &s);
|
|
}
|
|
return (dv);
|
|
}
|
|
|
|
/*
|
|
* Determines the queue depth for a given device.
|
|
*/
|
|
static void
|
|
ahc_linux_device_queue_depth(struct ahc_softc *ahc,
|
|
struct ahc_linux_device *dev)
|
|
{
|
|
struct ahc_devinfo devinfo;
|
|
u_int tags;
|
|
|
|
ahc_compile_devinfo(&devinfo,
|
|
dev->target->channel == 0
|
|
? ahc->our_id : ahc->our_id_b,
|
|
dev->target->target, dev->lun,
|
|
dev->target->channel == 0 ? 'A' : 'B',
|
|
ROLE_INITIATOR);
|
|
tags = ahc_linux_user_tagdepth(ahc, &devinfo);
|
|
if (tags != 0
|
|
&& dev->scsi_device != NULL
|
|
&& dev->scsi_device->tagged_supported != 0) {
|
|
|
|
ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED);
|
|
ahc_print_devinfo(ahc, &devinfo);
|
|
printf("Tagged Queuing enabled. Depth %d\n", tags);
|
|
} else {
|
|
ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE);
|
|
}
|
|
}
|
|
|
|
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
|
|
&& AHC_DV_SIMQ_FROZEN(ahc) == 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->device->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 (AHC_DV_CMD(cmd) != 0)
|
|
scb->flags |= SCB_SILENT;
|
|
|
|
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 LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
|
|
int msg_bytes;
|
|
uint8_t tag_msgs[2];
|
|
|
|
msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
|
|
if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
|
|
hscb->control |= tag_msgs[0];
|
|
if (tag_msgs[0] == MSG_ORDERED_TASK)
|
|
dev->commands_since_idle_or_otag = 0;
|
|
} else
|
|
#endif
|
|
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) {
|
|
dma_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;
|
|
dma_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.
|
|
*/
|
|
irqreturn_t
|
|
ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
|
|
{
|
|
struct ahc_softc *ahc;
|
|
u_long flags;
|
|
int ours;
|
|
|
|
ahc = (struct ahc_softc *) dev_id;
|
|
ahc_lock(ahc, &flags);
|
|
ours = ahc_intr(ahc);
|
|
if (ahc_linux_next_device_to_run(ahc) != NULL)
|
|
ahc_schedule_runq(ahc);
|
|
ahc_linux_run_complete_queue(ahc);
|
|
ahc_unlock(ahc, &flags);
|
|
return IRQ_RETVAL(ours);
|
|
}
|
|
|
|
void
|
|
ahc_platform_flushwork(struct ahc_softc *ahc)
|
|
{
|
|
|
|
while (ahc_linux_run_complete_queue(ahc) != NULL)
|
|
;
|
|
}
|
|
|
|
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;
|
|
|
|
target_offset = target;
|
|
if (channel != 0)
|
|
target_offset += 8;
|
|
|
|
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;
|
|
targ->flags = AHC_DV_REQUIRED;
|
|
ahc->platform_data->targets[target_offset] = targ;
|
|
return (targ);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_free_target(struct ahc_softc *ahc, struct ahc_linux_target *targ)
|
|
{
|
|
struct ahc_devinfo devinfo;
|
|
struct ahc_initiator_tinfo *tinfo;
|
|
struct ahc_tmode_tstate *tstate;
|
|
u_int our_id;
|
|
u_int target_offset;
|
|
char channel;
|
|
|
|
/*
|
|
* Force a negotiation to async/narrow on any
|
|
* future command to this device unless a bus
|
|
* reset occurs between now and that command.
|
|
*/
|
|
channel = 'A' + targ->channel;
|
|
our_id = ahc->our_id;
|
|
target_offset = targ->target;
|
|
if (targ->channel != 0) {
|
|
target_offset += 8;
|
|
our_id = ahc->our_id_b;
|
|
}
|
|
tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
|
|
targ->target, &tstate);
|
|
ahc_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD,
|
|
channel, ROLE_INITIATOR);
|
|
ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
|
|
AHC_TRANS_GOAL, /*paused*/FALSE);
|
|
ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
|
|
AHC_TRANS_GOAL, /*paused*/FALSE);
|
|
ahc_update_neg_request(ahc, &devinfo, tstate, tinfo, AHC_NEG_ALWAYS);
|
|
ahc->platform_data->targets[target_offset] = NULL;
|
|
if (targ->inq_data != NULL)
|
|
free(targ->inq_data, M_DEVBUF);
|
|
if (targ->dv_buffer != NULL)
|
|
free(targ->dv_buffer, M_DEVBUF);
|
|
if (targ->dv_buffer1 != NULL)
|
|
free(targ->dv_buffer1, M_DEVBUF);
|
|
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;
|
|
|
|
targ = dev->target;
|
|
targ->devices[dev->lun] = NULL;
|
|
free(dev, M_DEVBUF);
|
|
targ->refcount--;
|
|
if (targ->refcount == 0
|
|
&& (targ->flags & AHC_DV_REQUIRED) == 0)
|
|
ahc_linux_free_target(ahc, targ);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
|
|
{
|
|
del_timer_sync(&dev->timer);
|
|
__ahc_linux_free_device(ahc, dev);
|
|
}
|
|
|
|
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:
|
|
{
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
|
|
WARN_ON(lun != CAM_LUN_WILDCARD);
|
|
scsi_report_device_reset(ahc->platform_data->host,
|
|
channel - 'A', target);
|
|
#else
|
|
Scsi_Device *scsi_dev;
|
|
|
|
/*
|
|
* Find the SCSI device associated with this
|
|
* request and indicate that a UA is expected.
|
|
*/
|
|
for (scsi_dev = ahc->platform_data->host->host_queue;
|
|
scsi_dev != NULL; scsi_dev = scsi_dev->next) {
|
|
if (channel - 'A' == scsi_dev->channel
|
|
&& target == scsi_dev->id
|
|
&& (lun == CAM_LUN_WILDCARD
|
|
|| lun == scsi_dev->lun)) {
|
|
scsi_dev->was_reset = 1;
|
|
scsi_dev->expecting_cc_ua = 1;
|
|
}
|
|
}
|
|
#endif
|
|
break;
|
|
}
|
|
case AC_BUS_RESET:
|
|
if (ahc->platform_data->host != NULL) {
|
|
scsi_report_bus_reset(ahc->platform_data->host,
|
|
channel - 'A');
|
|
}
|
|
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++;
|
|
if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
|
|
cmd->result &= ~(CAM_DEV_QFRZN << 16);
|
|
dev->qfrozen--;
|
|
}
|
|
ahc_linux_unmap_scb(ahc, scb);
|
|
|
|
/*
|
|
* 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 ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
|
|
#ifdef AHC_DEBUG
|
|
if ((ahc_debug & AHC_SHOW_MISC) != 0) {
|
|
ahc_print_path(ahc, scb);
|
|
printf("Set CAM_UNCOR_PARITY\n");
|
|
}
|
|
#endif
|
|
ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
|
|
#ifdef AHC_REPORT_UNDERFLOWS
|
|
/*
|
|
* This code is disabled by default as some
|
|
* clients of the SCSI system do not properly
|
|
* initialize the underflow parameter. This
|
|
* results in spurious termination of commands
|
|
* that complete as expected (e.g. underflow is
|
|
* allowed as command can return variable amounts
|
|
* of data.
|
|
*/
|
|
} else if (amount_xferred < scb->io_ctx->underflow) {
|
|
u_int i;
|
|
|
|
ahc_print_path(ahc, scb);
|
|
printf("CDB:");
|
|
for (i = 0; i < scb->io_ctx->cmd_len; i++)
|
|
printf(" 0x%x", scb->io_ctx->cmnd[i]);
|
|
printf("\n");
|
|
ahc_print_path(ahc, scb);
|
|
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);
|
|
#endif
|
|
} else {
|
|
ahc_set_transaction_status(scb, CAM_REQ_CMP);
|
|
}
|
|
} else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
|
|
ahc_linux_handle_scsi_status(ahc, dev, scb);
|
|
} else if (ahc_get_transaction_status(scb) == CAM_SEL_TIMEOUT) {
|
|
dev->flags |= AHC_DEV_UNCONFIGURED;
|
|
if (AHC_DV_CMD(cmd) == FALSE)
|
|
dev->target->flags &= ~AHC_DV_REQUIRED;
|
|
}
|
|
/*
|
|
* Start DV for devices that require it assuming the first command
|
|
* sent does not result in a selection timeout.
|
|
*/
|
|
if (ahc_get_transaction_status(scb) != CAM_SEL_TIMEOUT
|
|
&& (dev->target->flags & AHC_DV_REQUIRED) != 0)
|
|
ahc_linux_start_dv(ahc);
|
|
|
|
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
|
|
&& (dev->flags & AHC_DEV_TIMER_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");
|
|
if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
|
|
|| ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
|
|
ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
|
|
if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
|
|
ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
|
|
up(&ahc->platform_data->eh_sem);
|
|
}
|
|
}
|
|
|
|
ahc_free_scb(ahc, scb);
|
|
ahc_linux_queue_cmd_complete(ahc, cmd);
|
|
|
|
if ((ahc->platform_data->flags & AHC_DV_WAIT_SIMQ_EMPTY) != 0
|
|
&& LIST_FIRST(&ahc->pending_scbs) == NULL) {
|
|
ahc->platform_data->flags &= ~AHC_DV_WAIT_SIMQ_EMPTY;
|
|
up(&ahc->platform_data->dv_sem);
|
|
}
|
|
|
|
}
|
|
|
|
static void
|
|
ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
|
|
struct ahc_linux_device *dev, struct scb *scb)
|
|
{
|
|
struct ahc_devinfo devinfo;
|
|
|
|
ahc_compile_devinfo(&devinfo,
|
|
ahc->our_id,
|
|
dev->target->target, dev->lun,
|
|
dev->target->channel == 0 ? 'A' : 'B',
|
|
ROLE_INITIATOR);
|
|
|
|
/*
|
|
* 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_CHECK_COND:
|
|
case SCSI_STATUS_CMD_TERMINATED:
|
|
{
|
|
Scsi_Cmnd *cmd;
|
|
|
|
/*
|
|
* Copy sense information to the OS's cmd
|
|
* structure if it is available.
|
|
*/
|
|
cmd = scb->io_ctx;
|
|
if (scb->flags & SCB_SENSE) {
|
|
u_int sense_size;
|
|
|
|
sense_size = MIN(sizeof(struct scsi_sense_data)
|
|
- ahc_get_sense_residual(scb),
|
|
sizeof(cmd->sense_buffer));
|
|
memcpy(cmd->sense_buffer,
|
|
ahc_get_sense_buf(ahc, scb), sense_size);
|
|
if (sense_size < sizeof(cmd->sense_buffer))
|
|
memset(&cmd->sense_buffer[sense_size], 0,
|
|
sizeof(cmd->sense_buffer) - sense_size);
|
|
cmd->result |= (DRIVER_SENSE << 24);
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_SENSE) {
|
|
int i;
|
|
|
|
printf("Copied %d bytes of sense data:",
|
|
sense_size);
|
|
for (i = 0; i < sense_size; i++) {
|
|
if ((i & 0xF) == 0)
|
|
printf("\n");
|
|
printf("0x%x ", cmd->sense_buffer[i]);
|
|
}
|
|
printf("\n");
|
|
}
|
|
#endif
|
|
}
|
|
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);
|
|
ahc_platform_set_tags(ahc, &devinfo,
|
|
(dev->flags & AHC_DEV_Q_BASIC)
|
|
? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
|
|
break;
|
|
}
|
|
/*
|
|
* Drop down to a single opening, and treat this
|
|
* as if the target returned BUSY SCSI status.
|
|
*/
|
|
dev->openings = 1;
|
|
ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
|
|
ahc_platform_set_tags(ahc, &devinfo,
|
|
(dev->flags & AHC_DEV_Q_BASIC)
|
|
? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
|
|
/* 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_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;
|
|
|
|
/*
|
|
* Map CAM error codes into Linux Error codes. We
|
|
* avoid the conversion so that the DV code has the
|
|
* full error information available when making
|
|
* state change decisions.
|
|
*/
|
|
if (AHC_DV_CMD(cmd) == FALSE) {
|
|
u_int new_status;
|
|
|
|
switch (ahc_cmd_get_transaction_status(cmd)) {
|
|
case CAM_REQ_INPROG:
|
|
case CAM_REQ_CMP:
|
|
case CAM_SCSI_STATUS_ERROR:
|
|
new_status = DID_OK;
|
|
break;
|
|
case CAM_REQ_ABORTED:
|
|
new_status = DID_ABORT;
|
|
break;
|
|
case CAM_BUSY:
|
|
new_status = DID_BUS_BUSY;
|
|
break;
|
|
case CAM_REQ_INVALID:
|
|
case CAM_PATH_INVALID:
|
|
new_status = DID_BAD_TARGET;
|
|
break;
|
|
case CAM_SEL_TIMEOUT:
|
|
new_status = DID_NO_CONNECT;
|
|
break;
|
|
case CAM_SCSI_BUS_RESET:
|
|
case CAM_BDR_SENT:
|
|
new_status = DID_RESET;
|
|
break;
|
|
case CAM_UNCOR_PARITY:
|
|
new_status = DID_PARITY;
|
|
break;
|
|
case CAM_CMD_TIMEOUT:
|
|
new_status = DID_TIME_OUT;
|
|
break;
|
|
case CAM_UA_ABORT:
|
|
case CAM_REQ_CMP_ERR:
|
|
case CAM_AUTOSENSE_FAIL:
|
|
case CAM_NO_HBA:
|
|
case CAM_DATA_RUN_ERR:
|
|
case CAM_UNEXP_BUSFREE:
|
|
case CAM_SEQUENCE_FAIL:
|
|
case CAM_CCB_LEN_ERR:
|
|
case CAM_PROVIDE_FAIL:
|
|
case CAM_REQ_TERMIO:
|
|
case CAM_UNREC_HBA_ERROR:
|
|
case CAM_REQ_TOO_BIG:
|
|
new_status = DID_ERROR;
|
|
break;
|
|
case CAM_REQUEUE_REQ:
|
|
/*
|
|
* 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. We also "fake" a check condition with
|
|
* a sense code of ABORTED COMMAND. This seems to
|
|
* evoke a retry even if this command is being sent
|
|
* via the eh thread. Ick! Ick! Ick!
|
|
*/
|
|
if (cmd->retries > 0)
|
|
cmd->retries--;
|
|
new_status = DID_OK;
|
|
ahc_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND);
|
|
cmd->result |= (DRIVER_SENSE << 24);
|
|
memset(cmd->sense_buffer, 0,
|
|
sizeof(cmd->sense_buffer));
|
|
cmd->sense_buffer[0] = SSD_ERRCODE_VALID
|
|
| SSD_CURRENT_ERROR;
|
|
cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND;
|
|
break;
|
|
default:
|
|
/* We should never get here */
|
|
new_status = DID_ERROR;
|
|
break;
|
|
}
|
|
|
|
ahc_cmd_set_transaction_status(cmd, new_status);
|
|
}
|
|
|
|
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 void
|
|
ahc_linux_filter_inquiry(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
|
|
{
|
|
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 maxsync;
|
|
u_int width;
|
|
u_int period;
|
|
u_int offset;
|
|
u_int ppr_options;
|
|
u_int trans_version;
|
|
u_int prot_version;
|
|
|
|
/*
|
|
* 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, devinfo->channel - 'A',
|
|
devinfo->target, devinfo->lun,
|
|
/*alloc*/TRUE);
|
|
|
|
sid = (struct scsi_inquiry_data *)dev->target->inq_data;
|
|
if (SID_QUAL(sid) == SID_QUAL_LU_CONNECTED) {
|
|
|
|
dev->flags &= ~AHC_DEV_UNCONFIGURED;
|
|
} else {
|
|
dev->flags |= AHC_DEV_UNCONFIGURED;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Update our notion of this device's transfer
|
|
* negotiation capabilities.
|
|
*/
|
|
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;
|
|
trans_version = user->transport_version;
|
|
prot_version = MIN(user->protocol_version, SID_ANSI_REV(sid));
|
|
|
|
/*
|
|
* Only attempt SPI3/4 once we've verified that
|
|
* the device claims to support SPI3/4 features.
|
|
*/
|
|
if (prot_version < SCSI_REV_2)
|
|
trans_version = SID_ANSI_REV(sid);
|
|
else
|
|
trans_version = SCSI_REV_2;
|
|
|
|
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;
|
|
}
|
|
if ((sid->spi3data & SID_SPI_QAS) == 0)
|
|
ppr_options &= ~MSG_EXT_PPR_QAS_REQ;
|
|
if ((sid->spi3data & SID_SPI_CLOCK_DT) == 0)
|
|
ppr_options &= MSG_EXT_PPR_QAS_REQ;
|
|
if ((sid->spi3data & SID_SPI_IUS) == 0)
|
|
ppr_options &= (MSG_EXT_PPR_DT_REQ
|
|
| MSG_EXT_PPR_QAS_REQ);
|
|
|
|
if (prot_version > SCSI_REV_2
|
|
&& ppr_options != 0)
|
|
trans_version = user->transport_version;
|
|
|
|
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. */
|
|
curr->transport_version = trans_version;
|
|
curr->protocol_version = prot_version;
|
|
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);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_sem_timeout(u_long arg)
|
|
{
|
|
struct ahc_softc *ahc;
|
|
u_long s;
|
|
|
|
ahc = (struct ahc_softc *)arg;
|
|
|
|
ahc_lock(ahc, &s);
|
|
if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
|
|
ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
|
|
up(&ahc->platform_data->eh_sem);
|
|
}
|
|
ahc_unlock(ahc, &s);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_freeze_simq(struct ahc_softc *ahc)
|
|
{
|
|
ahc->platform_data->qfrozen++;
|
|
if (ahc->platform_data->qfrozen == 1) {
|
|
scsi_block_requests(ahc->platform_data->host);
|
|
|
|
/* XXX What about Twin channels? */
|
|
ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
|
|
CAM_LUN_WILDCARD, SCB_LIST_NULL,
|
|
ROLE_INITIATOR, CAM_REQUEUE_REQ);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ahc_linux_release_simq(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;
|
|
if (AHC_DV_SIMQ_FROZEN(ahc)
|
|
&& ((ahc->platform_data->flags & AHC_DV_WAIT_SIMQ_RELEASE) != 0)) {
|
|
ahc->platform_data->flags &= ~AHC_DV_WAIT_SIMQ_RELEASE;
|
|
up(&ahc->platform_data->dv_sem);
|
|
}
|
|
ahc_schedule_runq(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 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);
|
|
if (TAILQ_EMPTY(&dev->busyq)
|
|
&& dev->active == 0)
|
|
__ahc_linux_free_device(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;
|
|
u_int saved_scsiid;
|
|
u_int cdb_byte;
|
|
int retval;
|
|
int was_paused;
|
|
int paused;
|
|
int wait;
|
|
int disconnected;
|
|
|
|
pending_scb = NULL;
|
|
paused = FALSE;
|
|
wait = FALSE;
|
|
ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
|
|
acmd = (struct ahc_cmd *)cmd;
|
|
|
|
printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
|
|
ahc_name(ahc), cmd->device->channel,
|
|
cmd->device->id, cmd->device->lun,
|
|
flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
|
|
|
|
printf("CDB:");
|
|
for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
|
|
printf(" 0x%x", cmd->cmnd[cdb_byte]);
|
|
printf("\n");
|
|
|
|
/*
|
|
* In all versions of Linux, we have to work around
|
|
* a major flaw in how the mid-layer is locked down
|
|
* if we are to sleep successfully in our error handler
|
|
* while allowing our interrupt handler to run. Since
|
|
* the midlayer acquires either the io_request_lock or
|
|
* our lock prior to calling us, we must use the
|
|
* spin_unlock_irq() method for unlocking our lock.
|
|
* This will force interrupts to be enabled on the
|
|
* current CPU. Since the EH thread should not have
|
|
* been running with CPU interrupts disabled other than
|
|
* by acquiring either the io_request_lock or our own
|
|
* lock, this *should* be safe.
|
|
*/
|
|
ahc_midlayer_entrypoint_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->device->channel, cmd->device->id,
|
|
cmd->device->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->device->channel, cmd->device->id,
|
|
cmd->device->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->device->channel, cmd->device->id,
|
|
cmd->device->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->device->id,
|
|
cmd->device->channel + 'A',
|
|
cmd->device->lun,
|
|
CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
|
|
printf("%s:%d:%d:%d: Command found on untagged queue\n",
|
|
ahc_name(ahc), cmd->device->channel, cmd->device->id,
|
|
cmd->device->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->device->id,
|
|
cmd->device->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->device->channel, cmd->device->id,
|
|
cmd->device->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 we didn't "just" miss
|
|
* an interrupt that would affect this cmd.
|
|
*/
|
|
was_paused = ahc_is_paused(ahc);
|
|
ahc_pause_and_flushwork(ahc);
|
|
paused = TRUE;
|
|
|
|
if ((pending_scb->flags & SCB_ACTIVE) == 0) {
|
|
printf("%s:%d:%d:%d: Command already completed\n",
|
|
ahc_name(ahc), cmd->device->channel, cmd->device->id,
|
|
cmd->device->lun);
|
|
goto no_cmd;
|
|
}
|
|
|
|
printf("%s: At time of recovery, card was %spaused\n",
|
|
ahc_name(ahc), was_paused ? "" : "not ");
|
|
ahc_dump_card_state(ahc);
|
|
|
|
disconnected = TRUE;
|
|
if (flag == SCB_ABORT) {
|
|
if (ahc_search_qinfifo(ahc, cmd->device->id,
|
|
cmd->device->channel + 'A',
|
|
cmd->device->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->device->channel,
|
|
cmd->device->id, cmd->device->lun);
|
|
retval = SUCCESS;
|
|
goto done;
|
|
}
|
|
} else if (ahc_search_qinfifo(ahc, cmd->device->id,
|
|
cmd->device->channel + 'A',
|
|
cmd->device->lun, pending_scb->hscb->tag,
|
|
ROLE_INITIATOR, /*status*/0,
|
|
SEARCH_COUNT) > 0) {
|
|
disconnected = FALSE;
|
|
}
|
|
|
|
if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 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) == SCB_GET_LUN(pending_scb))
|
|
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);
|
|
saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
|
|
if (last_phase != P_BUSFREE
|
|
&& (pending_scb->hscb->tag == active_scb_index
|
|
|| (flag == SCB_DEVICE_RESET
|
|
&& SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) {
|
|
|
|
/*
|
|
* 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->device->channel, cmd->device->id,
|
|
cmd->device->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->device->id,
|
|
cmd->device->channel + 'A',
|
|
cmd->device->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->device->id,
|
|
cmd->device->channel + 'A',
|
|
cmd->device->lun, SCB_LIST_NULL,
|
|
ROLE_INITIATOR, CAM_REQUEUE_REQ,
|
|
SEARCH_COMPLETE);
|
|
ahc_qinfifo_requeue_tail(ahc, pending_scb);
|
|
ahc_outb(ahc, SCBPTR, saved_scbptr);
|
|
ahc_print_path(ahc, pending_scb);
|
|
printf("Device is disconnected, re-queuing SCB\n");
|
|
wait = TRUE;
|
|
} else {
|
|
printf("%s:%d:%d:%d: Unable to deliver message\n",
|
|
ahc_name(ahc), cmd->device->channel, cmd->device->id,
|
|
cmd->device->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->platform_data->flags |= AHC_UP_EH_SEMAPHORE;
|
|
spin_unlock_irq(&ahc->platform_data->spin_lock);
|
|
init_timer(&timer);
|
|
timer.data = (u_long)ahc;
|
|
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_sync(&timer);
|
|
if (ret == 0) {
|
|
printf("Timer Expired\n");
|
|
retval = FAILED;
|
|
}
|
|
spin_lock_irq(&ahc->platform_data->spin_lock);
|
|
}
|
|
ahc_schedule_runq(ahc);
|
|
ahc_linux_run_complete_queue(ahc);
|
|
ahc_midlayer_entrypoint_unlock(ahc, &s);
|
|
return (retval);
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void ahc_linux_exit(void);
|
|
|
|
static int __init
|
|
ahc_linux_init(void)
|
|
{
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
|
|
int rc = ahc_linux_detect(&aic7xxx_driver_template);
|
|
if (rc)
|
|
return rc;
|
|
ahc_linux_exit();
|
|
return -ENODEV;
|
|
#else
|
|
scsi_register_module(MODULE_SCSI_HA, &aic7xxx_driver_template);
|
|
if (aic7xxx_driver_template.present == 0) {
|
|
scsi_unregister_module(MODULE_SCSI_HA,
|
|
&aic7xxx_driver_template);
|
|
return (-ENODEV);
|
|
}
|
|
|
|
return (0);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
ahc_linux_exit(void)
|
|
{
|
|
struct ahc_softc *ahc;
|
|
|
|
/*
|
|
* Shutdown DV threads before going into the SCSI mid-layer.
|
|
* This avoids situations where the mid-layer locks the entire
|
|
* kernel so that waiting for our DV threads to exit leads
|
|
* to deadlock.
|
|
*/
|
|
TAILQ_FOREACH(ahc, &ahc_tailq, links) {
|
|
|
|
ahc_linux_kill_dv_thread(ahc);
|
|
}
|
|
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
|
|
/*
|
|
* In 2.4 we have to unregister from the PCI core _after_
|
|
* unregistering from the scsi midlayer to avoid dangling
|
|
* references.
|
|
*/
|
|
scsi_unregister_module(MODULE_SCSI_HA, &aic7xxx_driver_template);
|
|
#endif
|
|
ahc_linux_pci_exit();
|
|
ahc_linux_eisa_exit();
|
|
}
|
|
|
|
module_init(ahc_linux_init);
|
|
module_exit(ahc_linux_exit);
|