10f5aa018f
When sending a device reset we should not take a reference to the SCSI command. Signed-off-by: Hannes Reinecke <hare@suse.de> Link: https://lore.kernel.org/r/20231002154328.43718-8-hare@suse.de Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2591 lines
70 KiB
C
2591 lines
70 KiB
C
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/*
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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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static struct scsi_transport_template *ahc_linux_transport_template = NULL;
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#include <linux/init.h> /* __setup */
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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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#include <linux/slab.h>
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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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* 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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* 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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* 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 overwhelming.
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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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* 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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* 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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static 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: Hannes Reinecke <hare@suse.de>");
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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 Suppress 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"
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" tag_info:<tag_str> Set per-target tag depth\n"
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" global_tag_depth:<int> Global tag depth for every target\n"
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" on every bus\n"
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" seltime:<int> Selection Timeout\n"
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" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
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"\n"
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" Sample modprobe configuration file:\n"
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" # Toggle EISA/VLB probing\n"
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" # Set tag depth on Controller 1/Target 1 to 10 tags\n"
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" # Shorten the selection timeout to 128ms\n"
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"\n"
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" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
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);
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static void ahc_linux_handle_scsi_status(struct ahc_softc *,
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struct scsi_device *,
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struct scb *);
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static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
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struct scsi_cmnd *cmd);
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static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
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static void ahc_linux_release_simq(struct ahc_softc *ahc);
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static int ahc_linux_queue_recovery_cmd(struct scsi_device *sdev,
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struct scsi_cmnd *cmd);
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static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
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static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
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struct ahc_devinfo *devinfo);
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static void ahc_linux_device_queue_depth(struct scsi_device *);
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static int ahc_linux_run_command(struct ahc_softc*,
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struct ahc_linux_device *,
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struct scsi_cmnd *);
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static void ahc_linux_setup_tag_info_global(char *p);
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static int aic7xxx_setup(char *s);
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static int ahc_linux_unit;
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|
|
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/************************** OS Utility Wrappers *******************************/
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void
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ahc_delay(long usec)
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{
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/*
|
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* udelay on Linux can have problems for
|
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* multi-millisecond waits. Wait at most
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* 1024us per call.
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*/
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while (usec > 0) {
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udelay(usec % 1024);
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usec -= 1024;
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}
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}
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|
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/***************************** Low Level I/O **********************************/
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uint8_t
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ahc_inb(struct ahc_softc * ahc, long port)
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{
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uint8_t x;
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|
|
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if (ahc->tag == BUS_SPACE_MEMIO) {
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x = readb(ahc->bsh.maddr + port);
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} else {
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x = inb(ahc->bsh.ioport + port);
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}
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mb();
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return (x);
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}
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|
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void
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ahc_outb(struct ahc_softc * ahc, long port, uint8_t val)
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{
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if (ahc->tag == BUS_SPACE_MEMIO) {
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writeb(val, ahc->bsh.maddr + port);
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} else {
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outb(val, ahc->bsh.ioport + port);
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}
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mb();
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}
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|
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void
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ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
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|
{
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int i;
|
|
|
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/*
|
|
* There is probably a more efficient way to do this on Linux
|
|
* but we don't use this for anything speed critical and this
|
|
* should work.
|
|
*/
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|
for (i = 0; i < count; i++)
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ahc_outb(ahc, port, *array++);
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}
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|
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void
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|
ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
|
|
{
|
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int i;
|
|
|
|
/*
|
|
* There is probably a more efficient way to do this on Linux
|
|
* but we don't use this for anything speed critical and this
|
|
* should work.
|
|
*/
|
|
for (i = 0; i < count; i++)
|
|
*array++ = ahc_inb(ahc, port);
|
|
}
|
|
|
|
/********************************* Inlines ************************************/
|
|
static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
|
|
|
|
static 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 void
|
|
ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
|
|
{
|
|
struct scsi_cmnd *cmd;
|
|
|
|
cmd = scb->io_ctx;
|
|
ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
|
|
|
|
scsi_dma_unmap(cmd);
|
|
}
|
|
|
|
static 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);
|
|
}
|
|
|
|
/*
|
|
* 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 " AIC7XXX_DRIVER_VERSION "\n"
|
|
" <");
|
|
strcat(bp, ahc->description);
|
|
strcat(bp, ">\n"
|
|
" ");
|
|
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_lck(struct scsi_cmnd *cmd)
|
|
{
|
|
struct ahc_softc *ahc;
|
|
struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
|
|
int rtn = SCSI_MLQUEUE_HOST_BUSY;
|
|
unsigned long flags;
|
|
|
|
ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
|
|
|
|
ahc_lock(ahc, &flags);
|
|
if (ahc->platform_data->qfrozen == 0) {
|
|
cmd->result = CAM_REQ_INPROG << 16;
|
|
rtn = ahc_linux_run_command(ahc, dev, cmd);
|
|
}
|
|
ahc_unlock(ahc, &flags);
|
|
|
|
return rtn;
|
|
}
|
|
|
|
static DEF_SCSI_QCMD(ahc_linux_queue)
|
|
|
|
static inline struct scsi_target **
|
|
ahc_linux_target_in_softc(struct scsi_target *starget)
|
|
{
|
|
struct ahc_softc *ahc =
|
|
*((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
|
|
unsigned int target_offset;
|
|
|
|
target_offset = starget->id;
|
|
if (starget->channel != 0)
|
|
target_offset += 8;
|
|
|
|
return &ahc->platform_data->starget[target_offset];
|
|
}
|
|
|
|
static int
|
|
ahc_linux_target_alloc(struct scsi_target *starget)
|
|
{
|
|
struct ahc_softc *ahc =
|
|
*((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
|
|
struct seeprom_config *sc = ahc->seep_config;
|
|
unsigned long flags;
|
|
struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
|
|
unsigned short scsirate;
|
|
struct ahc_devinfo devinfo;
|
|
char channel = starget->channel + 'A';
|
|
unsigned int our_id = ahc->our_id;
|
|
unsigned int target_offset;
|
|
|
|
target_offset = starget->id;
|
|
if (starget->channel != 0)
|
|
target_offset += 8;
|
|
|
|
if (starget->channel)
|
|
our_id = ahc->our_id_b;
|
|
|
|
ahc_lock(ahc, &flags);
|
|
|
|
BUG_ON(*ahc_targp != NULL);
|
|
|
|
*ahc_targp = starget;
|
|
|
|
if (sc) {
|
|
int maxsync = AHC_SYNCRATE_DT;
|
|
int ultra = 0;
|
|
int flags = sc->device_flags[target_offset];
|
|
|
|
if (ahc->flags & AHC_NEWEEPROM_FMT) {
|
|
if (flags & CFSYNCHISULTRA)
|
|
ultra = 1;
|
|
} else if (flags & CFULTRAEN)
|
|
ultra = 1;
|
|
/* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
|
|
* change it to ultra=0, CFXFER = 0 */
|
|
if(ultra && (flags & CFXFER) == 0x04) {
|
|
ultra = 0;
|
|
flags &= ~CFXFER;
|
|
}
|
|
|
|
if ((ahc->features & AHC_ULTRA2) != 0) {
|
|
scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
|
|
} else {
|
|
scsirate = (flags & CFXFER) << 4;
|
|
maxsync = ultra ? AHC_SYNCRATE_ULTRA :
|
|
AHC_SYNCRATE_FAST;
|
|
}
|
|
spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
|
|
if (!(flags & CFSYNCH))
|
|
spi_max_offset(starget) = 0;
|
|
spi_min_period(starget) =
|
|
ahc_find_period(ahc, scsirate, maxsync);
|
|
}
|
|
ahc_compile_devinfo(&devinfo, our_id, starget->id,
|
|
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_unlock(ahc, &flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
ahc_linux_target_destroy(struct scsi_target *starget)
|
|
{
|
|
struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
|
|
|
|
*ahc_targp = NULL;
|
|
}
|
|
|
|
static int
|
|
ahc_linux_slave_alloc(struct scsi_device *sdev)
|
|
{
|
|
struct ahc_softc *ahc =
|
|
*((struct ahc_softc **)sdev->host->hostdata);
|
|
struct scsi_target *starget = sdev->sdev_target;
|
|
struct ahc_linux_device *dev;
|
|
|
|
if (bootverbose)
|
|
printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
|
|
|
|
dev = scsi_transport_device_data(sdev);
|
|
memset(dev, 0, sizeof(*dev));
|
|
|
|
/*
|
|
* 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;
|
|
|
|
spi_period(starget) = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ahc_linux_slave_configure(struct scsi_device *sdev)
|
|
{
|
|
if (bootverbose)
|
|
sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
|
|
|
|
ahc_linux_device_queue_depth(sdev);
|
|
|
|
/* Initial Domain Validation */
|
|
if (!spi_initial_dv(sdev->sdev_target))
|
|
spi_dv_device(sdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if defined(__i386__)
|
|
/*
|
|
* Return the disk geometry for the given SCSI device.
|
|
*/
|
|
static int
|
|
ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
|
|
sector_t capacity, int geom[])
|
|
{
|
|
int heads;
|
|
int sectors;
|
|
int cylinders;
|
|
int extended;
|
|
struct ahc_softc *ahc;
|
|
u_int channel;
|
|
|
|
ahc = *((struct ahc_softc **)sdev->host->hostdata);
|
|
channel = sdev_channel(sdev);
|
|
|
|
if (scsi_partsize(bdev, capacity, geom))
|
|
return 0;
|
|
|
|
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(struct scsi_cmnd *cmd)
|
|
{
|
|
int error;
|
|
|
|
error = ahc_linux_queue_recovery_cmd(cmd->device, cmd);
|
|
if (error != SUCCESS)
|
|
printk("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(struct scsi_cmnd *cmd)
|
|
{
|
|
int error;
|
|
|
|
error = ahc_linux_queue_recovery_cmd(cmd->device, NULL);
|
|
if (error != SUCCESS)
|
|
printk("aic7xxx_dev_reset returns 0x%x\n", error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Reset the SCSI bus.
|
|
*/
|
|
static int
|
|
ahc_linux_bus_reset(struct scsi_cmnd *cmd)
|
|
{
|
|
struct ahc_softc *ahc;
|
|
int found;
|
|
unsigned long flags;
|
|
|
|
ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
|
|
|
|
ahc_lock(ahc, &flags);
|
|
found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',
|
|
/*initiate reset*/TRUE);
|
|
ahc_unlock(ahc, &flags);
|
|
|
|
if (bootverbose)
|
|
printk("%s: SCSI bus reset delivered. "
|
|
"%d SCBs aborted.\n", ahc_name(ahc), found);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
struct scsi_host_template aic7xxx_driver_template = {
|
|
.module = THIS_MODULE,
|
|
.name = "aic7xxx",
|
|
.proc_name = "aic7xxx",
|
|
.show_info = ahc_linux_show_info,
|
|
.write_info = ahc_proc_write_seeprom,
|
|
.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,
|
|
.max_sectors = 8192,
|
|
.cmd_per_lun = 2,
|
|
.slave_alloc = ahc_linux_slave_alloc,
|
|
.slave_configure = ahc_linux_slave_configure,
|
|
.target_alloc = ahc_linux_target_alloc,
|
|
.target_destroy = ahc_linux_target_destroy,
|
|
};
|
|
|
|
/**************************** Tasklet Handler *********************************/
|
|
|
|
|
|
static inline unsigned int ahc_build_scsiid(struct ahc_softc *ahc,
|
|
struct scsi_device *sdev)
|
|
{
|
|
unsigned int scsiid = (sdev->id << TID_SHIFT) & TID;
|
|
|
|
if (sdev->channel == 0)
|
|
scsiid |= ahc->our_id;
|
|
else
|
|
scsiid |= ahc->our_id_b | TWIN_CHNLB;
|
|
return scsiid;
|
|
}
|
|
|
|
/******************************** 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 = kmalloc(sizeof(*dmat), GFP_ATOMIC);
|
|
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)
|
|
{
|
|
kfree(dmat);
|
|
}
|
|
|
|
int
|
|
ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
|
|
int flags, bus_dmamap_t *mapp)
|
|
{
|
|
/* XXX: check if we really need the GFP_ATOMIC and unwind this mess! */
|
|
*vaddr = dma_alloc_coherent(ahc->dev, dmat->maxsize, mapp, GFP_ATOMIC);
|
|
if (*vaddr == NULL)
|
|
return ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
|
|
void* vaddr, bus_dmamap_t map)
|
|
{
|
|
dma_free_coherent(ahc->dev, dmat->maxsize, vaddr, map);
|
|
}
|
|
|
|
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;
|
|
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)
|
|
{
|
|
}
|
|
|
|
int
|
|
ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
|
|
{
|
|
/* Nothing to do */
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_setup_tag_info_global(char *p)
|
|
{
|
|
int tags, i, j;
|
|
|
|
tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
|
|
printk("Setting Global Tags= %d\n", tags);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(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 < ARRAY_SIZE(aic7xxx_tag_info))
|
|
&& (targ < AHC_NUM_TARGETS)) {
|
|
aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
|
|
if (bootverbose)
|
|
printk("tag_info[%d:%d] = %d\n", instance, targ, value);
|
|
}
|
|
}
|
|
|
|
static char *
|
|
ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
|
|
void (*callback)(u_long, int, int, int32_t),
|
|
u_long callback_arg)
|
|
{
|
|
char *tok_end;
|
|
char *tok_end2;
|
|
int i;
|
|
int instance;
|
|
int targ;
|
|
int done;
|
|
char tok_list[] = {'.', ',', '{', '}', '\0'};
|
|
|
|
/* All options use a ':' name/arg separator */
|
|
if (*opt_arg != ':')
|
|
return (opt_arg);
|
|
opt_arg++;
|
|
instance = -1;
|
|
targ = -1;
|
|
done = FALSE;
|
|
/*
|
|
* Restore separator that may be in
|
|
* the middle of our option argument.
|
|
*/
|
|
tok_end = strchr(opt_arg, '\0');
|
|
if (tok_end < end)
|
|
*tok_end = ',';
|
|
while (!done) {
|
|
switch (*opt_arg) {
|
|
case '{':
|
|
if (instance == -1) {
|
|
instance = 0;
|
|
} else {
|
|
if (depth > 1) {
|
|
if (targ == -1)
|
|
targ = 0;
|
|
} else {
|
|
printk("Malformed Option %s\n",
|
|
opt_name);
|
|
done = TRUE;
|
|
}
|
|
}
|
|
opt_arg++;
|
|
break;
|
|
case '}':
|
|
if (targ != -1)
|
|
targ = -1;
|
|
else if (instance != -1)
|
|
instance = -1;
|
|
opt_arg++;
|
|
break;
|
|
case ',':
|
|
case '.':
|
|
if (instance == -1)
|
|
done = TRUE;
|
|
else if (targ >= 0)
|
|
targ++;
|
|
else if (instance >= 0)
|
|
instance++;
|
|
opt_arg++;
|
|
break;
|
|
case '\0':
|
|
done = TRUE;
|
|
break;
|
|
default:
|
|
tok_end = end;
|
|
for (i = 0; tok_list[i]; i++) {
|
|
tok_end2 = strchr(opt_arg, tok_list[i]);
|
|
if ((tok_end2) && (tok_end2 < tok_end))
|
|
tok_end = tok_end2;
|
|
}
|
|
callback(callback_arg, instance, targ,
|
|
simple_strtol(opt_arg, NULL, 0));
|
|
opt_arg = tok_end;
|
|
break;
|
|
}
|
|
}
|
|
return (opt_arg);
|
|
}
|
|
|
|
/*
|
|
* 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 const 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
|
|
{ "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 ARRAY_SIZE
|
|
* will never be 0 in this case.
|
|
*/
|
|
n = 0;
|
|
|
|
while ((p = strsep(&s, ",.")) != NULL) {
|
|
if (*p == '\0')
|
|
continue;
|
|
for (i = 0; i < ARRAY_SIZE(options); i++) {
|
|
|
|
n = strlen(options[i].name);
|
|
if (strncmp(options[i].name, p, n) == 0)
|
|
break;
|
|
}
|
|
if (i == ARRAY_SIZE(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 = ahc_parse_brace_option("tag_info", p + n, end,
|
|
2, ahc_linux_setup_tag_info, 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, struct scsi_host_template *template)
|
|
{
|
|
char buf[80];
|
|
struct Scsi_Host *host;
|
|
char *new_name;
|
|
u_long s;
|
|
int retval;
|
|
|
|
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->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_lock(ahc, &s);
|
|
ahc_set_unit(ahc, ahc_linux_unit++);
|
|
ahc_unlock(ahc, &s);
|
|
sprintf(buf, "scsi%d", host->host_no);
|
|
new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
|
|
if (new_name != NULL) {
|
|
strcpy(new_name, buf);
|
|
ahc_set_name(ahc, new_name);
|
|
}
|
|
host->unique_id = ahc->unit;
|
|
ahc_linux_initialize_scsi_bus(ahc);
|
|
ahc_intr_enable(ahc, TRUE);
|
|
|
|
host->transportt = ahc_linux_transport_template;
|
|
|
|
retval = scsi_add_host(host, ahc->dev);
|
|
if (retval) {
|
|
printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
|
|
scsi_host_put(host);
|
|
return retval;
|
|
}
|
|
|
|
scsi_scan_host(host);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Place the SCSI bus into a known state by either resetting it,
|
|
* or forcing transfer negotiations on the next command to any
|
|
* target.
|
|
*/
|
|
static void
|
|
ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
|
|
{
|
|
int i;
|
|
int numtarg;
|
|
unsigned long s;
|
|
|
|
i = 0;
|
|
numtarg = 0;
|
|
|
|
ahc_lock(ahc, &s);
|
|
|
|
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);
|
|
}
|
|
ahc_unlock(ahc, &s);
|
|
/* Give the bus some time to recover */
|
|
if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
|
|
ahc_linux_freeze_simq(ahc);
|
|
msleep(AIC7XXX_RESET_DELAY);
|
|
ahc_linux_release_simq(ahc);
|
|
}
|
|
}
|
|
|
|
int
|
|
ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
|
|
{
|
|
|
|
ahc->platform_data =
|
|
kzalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC);
|
|
if (ahc->platform_data == NULL)
|
|
return (ENOMEM);
|
|
ahc->platform_data->irq = AHC_LINUX_NOIRQ;
|
|
ahc_lockinit(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 scsi_target *starget;
|
|
int i;
|
|
|
|
if (ahc->platform_data != NULL) {
|
|
/* destroy all of the device and target objects */
|
|
for (i = 0; i < AHC_NUM_TARGETS; i++) {
|
|
starget = ahc->platform_data->starget[i];
|
|
if (starget != NULL) {
|
|
ahc->platform_data->starget[i] = NULL;
|
|
}
|
|
}
|
|
|
|
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 (ahc->platform_data->host)
|
|
scsi_host_put(ahc->platform_data->host);
|
|
|
|
kfree(ahc->platform_data);
|
|
}
|
|
}
|
|
|
|
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 scsi_device *sdev,
|
|
struct ahc_devinfo *devinfo, ahc_queue_alg alg)
|
|
{
|
|
struct ahc_linux_device *dev;
|
|
int was_queuing;
|
|
int now_queuing;
|
|
|
|
if (sdev == NULL)
|
|
return;
|
|
dev = scsi_transport_device_data(sdev);
|
|
|
|
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 aggressively 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;
|
|
}
|
|
switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
|
|
case AHC_DEV_Q_BASIC:
|
|
case AHC_DEV_Q_TAGGED:
|
|
scsi_change_queue_depth(sdev,
|
|
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_change_queue_depth(sdev, 2);
|
|
break;
|
|
}
|
|
}
|
|
|
|
int
|
|
ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
|
|
int lun, u_int tag, role_t role, uint32_t status)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
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 >= ARRAY_SIZE(aic7xxx_tag_info)) {
|
|
if (warned_user == 0) {
|
|
|
|
printk(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);
|
|
}
|
|
|
|
/*
|
|
* Determines the queue depth for a given device.
|
|
*/
|
|
static void
|
|
ahc_linux_device_queue_depth(struct scsi_device *sdev)
|
|
{
|
|
struct ahc_devinfo devinfo;
|
|
u_int tags;
|
|
struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
|
|
|
|
ahc_compile_devinfo(&devinfo,
|
|
sdev->sdev_target->channel == 0
|
|
? ahc->our_id : ahc->our_id_b,
|
|
sdev->sdev_target->id, sdev->lun,
|
|
sdev->sdev_target->channel == 0 ? 'A' : 'B',
|
|
ROLE_INITIATOR);
|
|
tags = ahc_linux_user_tagdepth(ahc, &devinfo);
|
|
if (tags != 0 && sdev->tagged_supported != 0) {
|
|
|
|
ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
|
|
ahc_send_async(ahc, devinfo.channel, devinfo.target,
|
|
devinfo.lun, AC_TRANSFER_NEG);
|
|
ahc_print_devinfo(ahc, &devinfo);
|
|
printk("Tagged Queuing enabled. Depth %d\n", tags);
|
|
} else {
|
|
ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
|
|
ahc_send_async(ahc, devinfo.channel, devinfo.target,
|
|
devinfo.lun, AC_TRANSFER_NEG);
|
|
}
|
|
}
|
|
|
|
static int
|
|
ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
|
|
struct scsi_cmnd *cmd)
|
|
{
|
|
struct scb *scb;
|
|
struct hardware_scb *hscb;
|
|
struct ahc_initiator_tinfo *tinfo;
|
|
struct ahc_tmode_tstate *tstate;
|
|
uint16_t mask;
|
|
struct scb_tailq *untagged_q = NULL;
|
|
int nseg;
|
|
|
|
/*
|
|
* 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)
|
|
return SCSI_MLQUEUE_HOST_BUSY;
|
|
|
|
/*
|
|
* 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 (!(cmd->flags & SCMD_TAGGED)
|
|
&& (ahc->features & AHC_SCB_BTT) == 0) {
|
|
int target_offset;
|
|
|
|
target_offset = cmd->device->id + cmd->device->channel * 8;
|
|
untagged_q = &(ahc->untagged_queues[target_offset]);
|
|
if (!TAILQ_EMPTY(untagged_q))
|
|
/* if we're already executing an untagged command
|
|
* we're busy to another */
|
|
return SCSI_MLQUEUE_DEVICE_BUSY;
|
|
}
|
|
|
|
nseg = scsi_dma_map(cmd);
|
|
if (nseg < 0)
|
|
return SCSI_MLQUEUE_HOST_BUSY;
|
|
|
|
/*
|
|
* Get an scb to use.
|
|
*/
|
|
scb = ahc_get_scb(ahc);
|
|
if (!scb) {
|
|
scsi_dma_unmap(cmd);
|
|
return SCSI_MLQUEUE_HOST_BUSY;
|
|
}
|
|
|
|
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 = ahc_build_scsiid(ahc, cmd->device);
|
|
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 ((tstate->auto_negotiate & mask) != 0) {
|
|
scb->flags |= SCB_AUTO_NEGOTIATE;
|
|
scb->hscb->control |= MK_MESSAGE;
|
|
}
|
|
|
|
if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
|
|
if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
|
|
&& (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
|
|
hscb->control |= ORDERED_QUEUE_TAG;
|
|
dev->commands_since_idle_or_otag = 0;
|
|
} else {
|
|
hscb->control |= SIMPLE_QUEUE_TAG;
|
|
}
|
|
}
|
|
|
|
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 (nseg > 0) {
|
|
struct ahc_dma_seg *sg;
|
|
struct scatterlist *cur_seg;
|
|
int i;
|
|
|
|
/* 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.
|
|
*/
|
|
scsi_for_each_sg(cmd, cur_seg, nseg, i) {
|
|
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;
|
|
}
|
|
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 {
|
|
scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
|
|
scb->hscb->dataptr = 0;
|
|
scb->hscb->datacnt = 0;
|
|
scb->sg_count = 0;
|
|
}
|
|
|
|
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++;
|
|
|
|
scb->flags |= SCB_ACTIVE;
|
|
if (untagged_q) {
|
|
TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
|
|
scb->flags |= SCB_UNTAGGEDQ;
|
|
}
|
|
ahc_queue_scb(ahc, scb);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* SCSI controller interrupt handler.
|
|
*/
|
|
irqreturn_t
|
|
ahc_linux_isr(int irq, void *dev_id)
|
|
{
|
|
struct ahc_softc *ahc;
|
|
u_long flags;
|
|
int ours;
|
|
|
|
ahc = (struct ahc_softc *) dev_id;
|
|
ahc_lock(ahc, &flags);
|
|
ours = ahc_intr(ahc);
|
|
ahc_unlock(ahc, &flags);
|
|
return IRQ_RETVAL(ours);
|
|
}
|
|
|
|
void
|
|
ahc_platform_flushwork(struct ahc_softc *ahc)
|
|
{
|
|
|
|
}
|
|
|
|
void
|
|
ahc_send_async(struct ahc_softc *ahc, char channel,
|
|
u_int target, u_int lun, ac_code code)
|
|
{
|
|
switch (code) {
|
|
case AC_TRANSFER_NEG:
|
|
{
|
|
struct scsi_target *starget;
|
|
struct ahc_initiator_tinfo *tinfo;
|
|
struct ahc_tmode_tstate *tstate;
|
|
int target_offset;
|
|
unsigned int target_ppr_options;
|
|
|
|
BUG_ON(target == CAM_TARGET_WILDCARD);
|
|
|
|
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;
|
|
starget = ahc->platform_data->starget[target_offset];
|
|
if (starget == NULL)
|
|
break;
|
|
|
|
target_ppr_options =
|
|
(spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
|
|
+ (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
|
|
+ (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
|
|
|
|
if (tinfo->curr.period == spi_period(starget)
|
|
&& tinfo->curr.width == spi_width(starget)
|
|
&& tinfo->curr.offset == spi_offset(starget)
|
|
&& tinfo->curr.ppr_options == target_ppr_options)
|
|
if (bootverbose == 0)
|
|
break;
|
|
|
|
spi_period(starget) = tinfo->curr.period;
|
|
spi_width(starget) = tinfo->curr.width;
|
|
spi_offset(starget) = tinfo->curr.offset;
|
|
spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
|
|
spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
|
|
spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
|
|
spi_display_xfer_agreement(starget);
|
|
break;
|
|
}
|
|
case AC_SENT_BDR:
|
|
{
|
|
WARN_ON(lun != CAM_LUN_WILDCARD);
|
|
scsi_report_device_reset(ahc->platform_data->host,
|
|
channel - 'A', target);
|
|
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)
|
|
{
|
|
struct 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);
|
|
BUG_ON(!TAILQ_EMPTY(untagged_q));
|
|
} else if ((scb->flags & SCB_ACTIVE) == 0) {
|
|
/*
|
|
* Transactions aborted from the untagged queue may
|
|
* not have been dispatched to the controller, so
|
|
* only check the SCB_ACTIVE flag for tagged transactions.
|
|
*/
|
|
printk("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) {
|
|
#ifdef AHC_REPORT_UNDERFLOWS
|
|
uint32_t amount_xferred;
|
|
|
|
amount_xferred =
|
|
ahc_get_transfer_length(scb) - ahc_get_residual(scb);
|
|
#endif
|
|
if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
|
|
#ifdef AHC_DEBUG
|
|
if ((ahc_debug & AHC_SHOW_MISC) != 0) {
|
|
ahc_print_path(ahc, scb);
|
|
printk("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);
|
|
printk("CDB:");
|
|
for (i = 0; i < scb->io_ctx->cmd_len; i++)
|
|
printk(" 0x%x", scb->io_ctx->cmnd[i]);
|
|
printk("\n");
|
|
ahc_print_path(ahc, scb);
|
|
printk("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, cmd->device, scb);
|
|
}
|
|
|
|
if (dev->openings == 1
|
|
&& ahc_get_transaction_status(scb) == CAM_REQ_CMP
|
|
&& ahc_get_scsi_status(scb) != SAM_STAT_TASK_SET_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 ((scb->flags & SCB_RECOVERY_SCB) != 0) {
|
|
printk("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->eh_done)
|
|
complete(ahc->platform_data->eh_done);
|
|
}
|
|
|
|
ahc_free_scb(ahc, scb);
|
|
ahc_linux_queue_cmd_complete(ahc, cmd);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
|
|
struct scsi_device *sdev, struct scb *scb)
|
|
{
|
|
struct ahc_devinfo devinfo;
|
|
struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
|
|
|
|
ahc_compile_devinfo(&devinfo,
|
|
ahc->our_id,
|
|
sdev->sdev_target->id, sdev->lun,
|
|
sdev->sdev_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 SAM_STAT_CHECK_CONDITION:
|
|
case SAM_STAT_COMMAND_TERMINATED:
|
|
{
|
|
struct 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),
|
|
(u_long)SCSI_SENSE_BUFFERSIZE);
|
|
memcpy(cmd->sense_buffer,
|
|
ahc_get_sense_buf(ahc, scb), sense_size);
|
|
if (sense_size < SCSI_SENSE_BUFFERSIZE)
|
|
memset(&cmd->sense_buffer[sense_size], 0,
|
|
SCSI_SENSE_BUFFERSIZE - sense_size);
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOW_SENSE) {
|
|
int i;
|
|
|
|
printk("Copied %d bytes of sense data:",
|
|
sense_size);
|
|
for (i = 0; i < sense_size; i++) {
|
|
if ((i & 0xF) == 0)
|
|
printk("\n");
|
|
printk("0x%x ", cmd->sense_buffer[i]);
|
|
}
|
|
printk("\n");
|
|
}
|
|
#endif
|
|
}
|
|
break;
|
|
}
|
|
case SAM_STAT_TASK_SET_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);
|
|
printk("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);
|
|
printk("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, SAM_STAT_GOOD);
|
|
ahc_platform_set_tags(ahc, sdev, &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, SAM_STAT_BUSY);
|
|
ahc_platform_set_tags(ahc, sdev, &devinfo,
|
|
(dev->flags & AHC_DEV_Q_BASIC)
|
|
? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
|
|
{
|
|
/*
|
|
* 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.
|
|
*/
|
|
{
|
|
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:
|
|
new_status = DID_REQUEUE;
|
|
break;
|
|
default:
|
|
/* We should never get here */
|
|
new_status = DID_ERROR;
|
|
break;
|
|
}
|
|
|
|
ahc_cmd_set_transaction_status(cmd, new_status);
|
|
}
|
|
|
|
scsi_done(cmd);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_freeze_simq(struct ahc_softc *ahc)
|
|
{
|
|
unsigned long s;
|
|
|
|
ahc_lock(ahc, &s);
|
|
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);
|
|
}
|
|
ahc_unlock(ahc, &s);
|
|
}
|
|
|
|
static void
|
|
ahc_linux_release_simq(struct ahc_softc *ahc)
|
|
{
|
|
u_long s;
|
|
int unblock_reqs;
|
|
|
|
unblock_reqs = 0;
|
|
ahc_lock(ahc, &s);
|
|
if (ahc->platform_data->qfrozen > 0)
|
|
ahc->platform_data->qfrozen--;
|
|
if (ahc->platform_data->qfrozen == 0)
|
|
unblock_reqs = 1;
|
|
ahc_unlock(ahc, &s);
|
|
/*
|
|
* There is still a race here. The mid-layer
|
|
* should keep its own freeze count and use
|
|
* a bottom half handler to run the queues
|
|
* so we can unblock with our own lock held.
|
|
*/
|
|
if (unblock_reqs)
|
|
scsi_unblock_requests(ahc->platform_data->host);
|
|
}
|
|
|
|
static int
|
|
ahc_linux_queue_recovery_cmd(struct scsi_device *sdev,
|
|
struct scsi_cmnd *cmd)
|
|
{
|
|
struct ahc_softc *ahc;
|
|
struct ahc_linux_device *dev;
|
|
struct scb *pending_scb = NULL, *scb;
|
|
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;
|
|
unsigned long flags;
|
|
|
|
paused = FALSE;
|
|
wait = FALSE;
|
|
ahc = *(struct ahc_softc **)sdev->host->hostdata;
|
|
|
|
sdev_printk(KERN_INFO, sdev, "Attempting to queue a%s message\n",
|
|
cmd ? "n ABORT" : " TARGET RESET");
|
|
|
|
if (cmd) {
|
|
printk("CDB:");
|
|
for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
|
|
printk(" 0x%x", cmd->cmnd[cdb_byte]);
|
|
printk("\n");
|
|
}
|
|
|
|
ahc_lock(ahc, &flags);
|
|
|
|
/*
|
|
* 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 = scsi_transport_device_data(sdev);
|
|
|
|
if (dev == NULL) {
|
|
/*
|
|
* No target device for this command exists,
|
|
* so we must not still own the command.
|
|
*/
|
|
printk("%s:%d:%d:%d: Is not an active device\n",
|
|
ahc_name(ahc), sdev->channel, sdev->id, (u8)sdev->lun);
|
|
retval = SUCCESS;
|
|
goto no_cmd;
|
|
}
|
|
|
|
if (cmd && (dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
|
|
&& ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
|
|
cmd->device->channel + 'A',
|
|
(u8)cmd->device->lun,
|
|
CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
|
|
printk("%s:%d:%d:%d: Command found on untagged queue\n",
|
|
ahc_name(ahc), cmd->device->channel, cmd->device->id,
|
|
(u8)cmd->device->lun);
|
|
retval = SUCCESS;
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* See if we can find a matching cmd in the pending list.
|
|
*/
|
|
if (cmd) {
|
|
LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {
|
|
if (scb->io_ctx == cmd) {
|
|
pending_scb = scb;
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
/* Any SCB for this device will do for a target reset */
|
|
LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {
|
|
if (ahc_match_scb(ahc, scb, sdev->id,
|
|
sdev->channel + 'A',
|
|
CAM_LUN_WILDCARD,
|
|
SCB_LIST_NULL, ROLE_INITIATOR)) {
|
|
pending_scb = scb;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (pending_scb == NULL) {
|
|
sdev_printk(KERN_INFO, sdev, "Command not found\n");
|
|
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) {
|
|
scmd_printk(KERN_INFO, cmd, "Command already completed\n");
|
|
goto no_cmd;
|
|
}
|
|
|
|
printk("%s: At time of recovery, card was %spaused\n",
|
|
ahc_name(ahc), was_paused ? "" : "not ");
|
|
ahc_dump_card_state(ahc);
|
|
|
|
disconnected = TRUE;
|
|
if (cmd) {
|
|
if (ahc_search_qinfifo(ahc, sdev->id,
|
|
sdev->channel + 'A',
|
|
sdev->lun,
|
|
pending_scb->hscb->tag,
|
|
ROLE_INITIATOR, CAM_REQ_ABORTED,
|
|
SEARCH_COMPLETE) > 0) {
|
|
printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
|
|
ahc_name(ahc), sdev->channel,
|
|
sdev->id, (u8)sdev->lun);
|
|
retval = SUCCESS;
|
|
goto done;
|
|
}
|
|
} else if (ahc_search_qinfifo(ahc, sdev->id,
|
|
sdev->channel + 'A',
|
|
sdev->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 (!cmd
|
|
&& 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
|
|
|| (!cmd && SCSIID_TARGET(ahc, saved_scsiid) == sdev->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;
|
|
pending_scb->flags |= cmd ? SCB_ABORT : SCB_DEVICE_RESET;
|
|
ahc_outb(ahc, MSG_OUT, HOST_MSG);
|
|
ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
|
|
sdev_printk(KERN_INFO, sdev, "Device is active, asserting ATN\n");
|
|
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;
|
|
pending_scb->flags |= cmd ? SCB_ABORT : SCB_DEVICE_RESET;
|
|
|
|
/*
|
|
* 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, sdev->id,
|
|
sdev->channel + 'A',
|
|
sdev->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
|
|
* reselection, 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, sdev->id,
|
|
sdev->channel + 'A',
|
|
(u8)sdev->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);
|
|
printk("Device is disconnected, re-queuing SCB\n");
|
|
wait = TRUE;
|
|
} else {
|
|
sdev_printk(KERN_INFO, sdev, "Unable to deliver message\n");
|
|
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) {
|
|
DECLARE_COMPLETION_ONSTACK(done);
|
|
|
|
ahc->platform_data->eh_done = &done;
|
|
ahc_unlock(ahc, &flags);
|
|
|
|
printk("Recovery code sleeping\n");
|
|
if (!wait_for_completion_timeout(&done, 5 * HZ)) {
|
|
ahc_lock(ahc, &flags);
|
|
ahc->platform_data->eh_done = NULL;
|
|
ahc_unlock(ahc, &flags);
|
|
|
|
printk("Timer Expired\n");
|
|
retval = FAILED;
|
|
}
|
|
printk("Recovery code awake\n");
|
|
} else
|
|
ahc_unlock(ahc, &flags);
|
|
return (retval);
|
|
}
|
|
|
|
static void ahc_linux_set_width(struct scsi_target *starget, int width)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
|
|
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
|
|
struct ahc_devinfo devinfo;
|
|
unsigned long flags;
|
|
|
|
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
|
|
starget->channel + 'A', ROLE_INITIATOR);
|
|
ahc_lock(ahc, &flags);
|
|
ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
|
|
ahc_unlock(ahc, &flags);
|
|
}
|
|
|
|
static void ahc_linux_set_period(struct scsi_target *starget, int period)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
|
|
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
|
|
struct ahc_tmode_tstate *tstate;
|
|
struct ahc_initiator_tinfo *tinfo
|
|
= ahc_fetch_transinfo(ahc,
|
|
starget->channel + 'A',
|
|
shost->this_id, starget->id, &tstate);
|
|
struct ahc_devinfo devinfo;
|
|
unsigned int ppr_options = tinfo->goal.ppr_options;
|
|
unsigned long flags;
|
|
unsigned long offset = tinfo->goal.offset;
|
|
const struct ahc_syncrate *syncrate;
|
|
|
|
if (offset == 0)
|
|
offset = MAX_OFFSET;
|
|
|
|
if (period < 9)
|
|
period = 9; /* 12.5ns is our minimum */
|
|
if (period == 9) {
|
|
if (spi_max_width(starget))
|
|
ppr_options |= MSG_EXT_PPR_DT_REQ;
|
|
else
|
|
/* need wide for DT and need DT for 12.5 ns */
|
|
period = 10;
|
|
}
|
|
|
|
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
|
|
starget->channel + 'A', ROLE_INITIATOR);
|
|
|
|
/* all PPR requests apart from QAS require wide transfers */
|
|
if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
|
|
if (spi_width(starget) == 0)
|
|
ppr_options &= MSG_EXT_PPR_QAS_REQ;
|
|
}
|
|
|
|
syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
|
|
AHC_SYNCRATE_DT);
|
|
ahc_lock(ahc, &flags);
|
|
ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
|
|
ppr_options, AHC_TRANS_GOAL, FALSE);
|
|
ahc_unlock(ahc, &flags);
|
|
}
|
|
|
|
static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
|
|
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
|
|
struct ahc_tmode_tstate *tstate;
|
|
struct ahc_initiator_tinfo *tinfo
|
|
= ahc_fetch_transinfo(ahc,
|
|
starget->channel + 'A',
|
|
shost->this_id, starget->id, &tstate);
|
|
struct ahc_devinfo devinfo;
|
|
unsigned int ppr_options = 0;
|
|
unsigned int period = 0;
|
|
unsigned long flags;
|
|
const struct ahc_syncrate *syncrate = NULL;
|
|
|
|
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
|
|
starget->channel + 'A', ROLE_INITIATOR);
|
|
if (offset != 0) {
|
|
syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
|
|
AHC_SYNCRATE_DT);
|
|
period = tinfo->goal.period;
|
|
ppr_options = tinfo->goal.ppr_options;
|
|
}
|
|
ahc_lock(ahc, &flags);
|
|
ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
|
|
ppr_options, AHC_TRANS_GOAL, FALSE);
|
|
ahc_unlock(ahc, &flags);
|
|
}
|
|
|
|
static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
|
|
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
|
|
struct ahc_tmode_tstate *tstate;
|
|
struct ahc_initiator_tinfo *tinfo
|
|
= ahc_fetch_transinfo(ahc,
|
|
starget->channel + 'A',
|
|
shost->this_id, starget->id, &tstate);
|
|
struct ahc_devinfo devinfo;
|
|
unsigned int ppr_options = tinfo->goal.ppr_options
|
|
& ~MSG_EXT_PPR_DT_REQ;
|
|
unsigned int period = tinfo->goal.period;
|
|
unsigned int width = tinfo->goal.width;
|
|
unsigned long flags;
|
|
const struct ahc_syncrate *syncrate;
|
|
|
|
if (dt && spi_max_width(starget)) {
|
|
ppr_options |= MSG_EXT_PPR_DT_REQ;
|
|
if (!width)
|
|
ahc_linux_set_width(starget, 1);
|
|
} else if (period == 9)
|
|
period = 10; /* if resetting DT, period must be >= 25ns */
|
|
|
|
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
|
|
starget->channel + 'A', ROLE_INITIATOR);
|
|
syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
|
|
AHC_SYNCRATE_DT);
|
|
ahc_lock(ahc, &flags);
|
|
ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
|
|
ppr_options, AHC_TRANS_GOAL, FALSE);
|
|
ahc_unlock(ahc, &flags);
|
|
}
|
|
|
|
#if 0
|
|
/* FIXME: This code claims to support IU and QAS. However, the actual
|
|
* sequencer code and aic7xxx_core have no support for these parameters and
|
|
* will get into a bad state if they're negotiated. Do not enable this
|
|
* unless you know what you're doing */
|
|
static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
|
|
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
|
|
struct ahc_tmode_tstate *tstate;
|
|
struct ahc_initiator_tinfo *tinfo
|
|
= ahc_fetch_transinfo(ahc,
|
|
starget->channel + 'A',
|
|
shost->this_id, starget->id, &tstate);
|
|
struct ahc_devinfo devinfo;
|
|
unsigned int ppr_options = tinfo->goal.ppr_options
|
|
& ~MSG_EXT_PPR_QAS_REQ;
|
|
unsigned int period = tinfo->goal.period;
|
|
unsigned long flags;
|
|
struct ahc_syncrate *syncrate;
|
|
|
|
if (qas)
|
|
ppr_options |= MSG_EXT_PPR_QAS_REQ;
|
|
|
|
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
|
|
starget->channel + 'A', ROLE_INITIATOR);
|
|
syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
|
|
AHC_SYNCRATE_DT);
|
|
ahc_lock(ahc, &flags);
|
|
ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
|
|
ppr_options, AHC_TRANS_GOAL, FALSE);
|
|
ahc_unlock(ahc, &flags);
|
|
}
|
|
|
|
static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
|
|
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
|
|
struct ahc_tmode_tstate *tstate;
|
|
struct ahc_initiator_tinfo *tinfo
|
|
= ahc_fetch_transinfo(ahc,
|
|
starget->channel + 'A',
|
|
shost->this_id, starget->id, &tstate);
|
|
struct ahc_devinfo devinfo;
|
|
unsigned int ppr_options = tinfo->goal.ppr_options
|
|
& ~MSG_EXT_PPR_IU_REQ;
|
|
unsigned int period = tinfo->goal.period;
|
|
unsigned long flags;
|
|
struct ahc_syncrate *syncrate;
|
|
|
|
if (iu)
|
|
ppr_options |= MSG_EXT_PPR_IU_REQ;
|
|
|
|
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
|
|
starget->channel + 'A', ROLE_INITIATOR);
|
|
syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
|
|
AHC_SYNCRATE_DT);
|
|
ahc_lock(ahc, &flags);
|
|
ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
|
|
ppr_options, AHC_TRANS_GOAL, FALSE);
|
|
ahc_unlock(ahc, &flags);
|
|
}
|
|
#endif
|
|
|
|
static void ahc_linux_get_signalling(struct Scsi_Host *shost)
|
|
{
|
|
struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
|
|
unsigned long flags;
|
|
u8 mode;
|
|
|
|
if (!(ahc->features & AHC_ULTRA2)) {
|
|
/* non-LVD chipset, may not have SBLKCTL reg */
|
|
spi_signalling(shost) =
|
|
ahc->features & AHC_HVD ?
|
|
SPI_SIGNAL_HVD :
|
|
SPI_SIGNAL_SE;
|
|
return;
|
|
}
|
|
|
|
ahc_lock(ahc, &flags);
|
|
ahc_pause(ahc);
|
|
mode = ahc_inb(ahc, SBLKCTL);
|
|
ahc_unpause(ahc);
|
|
ahc_unlock(ahc, &flags);
|
|
|
|
if (mode & ENAB40)
|
|
spi_signalling(shost) = SPI_SIGNAL_LVD;
|
|
else if (mode & ENAB20)
|
|
spi_signalling(shost) = SPI_SIGNAL_SE;
|
|
else
|
|
spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
|
|
}
|
|
|
|
static struct spi_function_template ahc_linux_transport_functions = {
|
|
.set_offset = ahc_linux_set_offset,
|
|
.show_offset = 1,
|
|
.set_period = ahc_linux_set_period,
|
|
.show_period = 1,
|
|
.set_width = ahc_linux_set_width,
|
|
.show_width = 1,
|
|
.set_dt = ahc_linux_set_dt,
|
|
.show_dt = 1,
|
|
#if 0
|
|
.set_iu = ahc_linux_set_iu,
|
|
.show_iu = 1,
|
|
.set_qas = ahc_linux_set_qas,
|
|
.show_qas = 1,
|
|
#endif
|
|
.get_signalling = ahc_linux_get_signalling,
|
|
};
|
|
|
|
|
|
|
|
static int __init
|
|
ahc_linux_init(void)
|
|
{
|
|
/*
|
|
* If we've been passed any parameters, process them now.
|
|
*/
|
|
if (aic7xxx)
|
|
aic7xxx_setup(aic7xxx);
|
|
|
|
ahc_linux_transport_template =
|
|
spi_attach_transport(&ahc_linux_transport_functions);
|
|
if (!ahc_linux_transport_template)
|
|
return -ENODEV;
|
|
|
|
scsi_transport_reserve_device(ahc_linux_transport_template,
|
|
sizeof(struct ahc_linux_device));
|
|
|
|
ahc_linux_pci_init();
|
|
ahc_linux_eisa_init();
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
ahc_linux_exit(void)
|
|
{
|
|
ahc_linux_pci_exit();
|
|
ahc_linux_eisa_exit();
|
|
spi_release_transport(ahc_linux_transport_template);
|
|
}
|
|
|
|
module_init(ahc_linux_init);
|
|
module_exit(ahc_linux_exit);
|