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linux / linux / kernel / git / torvalds / linux / refs/tags/v2.6.12-rc5 / . / drivers / scsi / aic7xxx_old.c
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/*+M*************************************************************************
* Adaptec AIC7xxx device driver for Linux.
*
* Copyright (c) 1994 John Aycock
* The University of Calgary Department of Computer Science.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
* driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
* config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
* the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
* the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
* (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
* the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
* ANSI SCSI-2 specification (draft 10c), ...
*
* --------------------------------------------------------------------------
*
* Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
*
* Substantially modified to include support for wide and twin bus
* adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
* SCB paging, and other rework of the code.
*
* Parts of this driver were also based on the FreeBSD driver by
* Justin T. Gibbs. His copyright follows:
*
* --------------------------------------------------------------------------
* Copyright (c) 1994-1997 Justin Gibbs.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Where this Software is combined with software released under the terms of
* the GNU General Public License ("GPL") and the terms of the GPL would require the
* combined work to also be released under the terms of the GPL, the terms
* and conditions of this License will apply in addition to those of the
* GPL with the exception of any terms or conditions of this License that
* conflict with, or are expressly prohibited by, the GPL.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: aic7xxx.c,v 1.119 1997/06/27 19:39:18 gibbs Exp $
*---------------------------------------------------------------------------
*
* Thanks also go to (in alphabetical order) the following:
*
* Rory Bolt - Sequencer bug fixes
* Jay Estabrook - Initial DEC Alpha support
* Doug Ledford - Much needed abort/reset bug fixes
* Kai Makisara - DMAing of SCBs
*
* A Boot time option was also added for not resetting the scsi bus.
*
* Form: aic7xxx=extended
* aic7xxx=no_reset
* aic7xxx=ultra
* aic7xxx=irq_trigger:[0,1] # 0 edge, 1 level
* aic7xxx=verbose
*
* Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
*
* $Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp $
*-M*************************************************************************/
/*+M**************************************************************************
*
* Further driver modifications made by Doug Ledford <dledford@redhat.com>
*
* Copyright (c) 1997-1999 Doug Ledford
*
* These changes are released under the same licensing terms as the FreeBSD
* driver written by Justin Gibbs. Please see his Copyright notice above
* for the exact terms and conditions covering my changes as well as the
* warranty statement.
*
* Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
* but are not limited to:
*
* 1: Import of the latest FreeBSD sequencer code for this driver
* 2: Modification of kernel code to accommodate different sequencer semantics
* 3: Extensive changes throughout kernel portion of driver to improve
* abort/reset processing and error hanndling
* 4: Other work contributed by various people on the Internet
* 5: Changes to printk information and verbosity selection code
* 6: General reliability related changes, especially in IRQ management
* 7: Modifications to the default probe/attach order for supported cards
* 8: SMP friendliness has been improved
*
* Overall, this driver represents a significant departure from the official
* aic7xxx driver released by Dan Eischen in two ways. First, in the code
* itself. A diff between the two version of the driver is now a several
* thousand line diff. Second, in approach to solving the same problem. The
* problem is importing the FreeBSD aic7xxx driver code to linux can be a
* difficult and time consuming process, that also can be error prone. Dan
* Eischen's official driver uses the approach that the linux and FreeBSD
* drivers should be as identical as possible. To that end, his next version
* of this driver will be using a mid-layer code library that he is developing
* to moderate communications between the linux mid-level SCSI code and the
* low level FreeBSD driver. He intends to be able to essentially drop the
* FreeBSD driver into the linux kernel with only a few minor tweaks to some
* include files and the like and get things working, making for fast easy
* imports of the FreeBSD code into linux.
*
* I disagree with Dan's approach. Not that I don't think his way of doing
* things would be nice, easy to maintain, and create a more uniform driver
* between FreeBSD and Linux. I have no objection to those issues. My
* disagreement is on the needed functionality. There simply are certain
* things that are done differently in FreeBSD than linux that will cause
* problems for this driver regardless of any middle ware Dan implements.
* The biggest example of this at the moment is interrupt semantics. Linux
* doesn't provide the same protection techniques as FreeBSD does, nor can
* they be easily implemented in any middle ware code since they would truly
* belong in the kernel proper and would effect all drivers. For the time
* being, I see issues such as these as major stumbling blocks to the
* reliability of code based upon such middle ware. Therefore, I choose to
* use a different approach to importing the FreeBSD code that doesn't
* involve any middle ware type code. My approach is to import the sequencer
* code from FreeBSD wholesale. Then, to only make changes in the kernel
* portion of the driver as they are needed for the new sequencer semantics.
* In this way, the portion of the driver that speaks to the rest of the
* linux kernel is fairly static and can be changed/modified to solve
* any problems one might encounter without concern for the FreeBSD driver.
*
* Note: If time and experience should prove me wrong that the middle ware
* code Dan writes is reliable in its operation, then I'll retract my above
* statements. But, for those that don't know, I'm from Missouri (in the US)
* and our state motto is "The Show-Me State". Well, before I will put
* faith into it, you'll have to show me that it works :)
*
*_M*************************************************************************/
/*
* The next three defines are user configurable. These should be the only
* defines a user might need to get in here and change. There are other
* defines buried deeper in the code, but those really shouldn't need touched
* under normal conditions.
*/
/*
* AIC7XXX_STRICT_PCI_SETUP
* Should we assume the PCI config options on our controllers are set with
* sane and proper values, or should we be anal about our PCI config
* registers and force them to what we want? The main advantage to
* defining this option is on non-Intel hardware where the BIOS may not
* have been run to set things up, or if you have one of the BIOSless
* Adaptec controllers, such as a 2910, that don't get set up by the
* BIOS. However, keep in mind that we really do set the most important
* items in the driver regardless of this setting, this only controls some
* of the more esoteric PCI options on these cards. In that sense, I
* would default to leaving this off. However, if people wish to try
* things both ways, that would also help me to know if there are some
* machines where it works one way but not another.
*
* -- July 7, 17:09
* OK...I need this on my machine for testing, so the default is to
* leave it defined.
*
* -- July 7, 18:49
* I needed it for testing, but it didn't make any difference, so back
* off she goes.
*
* -- July 16, 23:04
* I turned it back on to try and compensate for the 2.1.x PCI code
* which no longer relies solely on the BIOS and now tries to set
* things itself.
*/
#define AIC7XXX_STRICT_PCI_SETUP
/*
* AIC7XXX_VERBOSE_DEBUGGING
* This option enables a lot of extra printk();s in the code, surrounded
* by if (aic7xxx_verbose ...) statements. Executing all of those if
* statements and the extra checks can get to where it actually does have
* an impact on CPU usage and such, as well as code size. Disabling this
* define will keep some of those from becoming part of the code.
*
* NOTE: Currently, this option has no real effect, I will be adding the
* various #ifdef's in the code later when I've decided a section is
* complete and no longer needs debugging. OK...a lot of things are now
* surrounded by this define, so turning this off does have an impact.
*/
/*
* #define AIC7XXX_VERBOSE_DEBUGGING
*/
#include <linux/module.h>
#include <stdarg.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/byteorder.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/blkdev.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/smp.h>
#include <linux/interrupt.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
#include "aic7xxx_old/aic7xxx.h"
#include "aic7xxx_old/sequencer.h"
#include "aic7xxx_old/scsi_message.h"
#include "aic7xxx_old/aic7xxx_reg.h"
#include <scsi/scsicam.h>
#include <linux/stat.h>
#include <linux/slab.h> /* for kmalloc() */
#include <linux/config.h> /* for CONFIG_PCI */
#define AIC7XXX_C_VERSION "5.2.6"
#define ALL_TARGETS -1
#define ALL_CHANNELS -1
#define ALL_LUNS -1
#define MAX_TARGETS 16
#define MAX_LUNS 8
#ifndef TRUE
# define TRUE 1
#endif
#ifndef FALSE
# define FALSE 0
#endif
#if defined(__powerpc__) || defined(__i386__) || defined(__x86_64__)
# define MMAPIO
#endif
/*
* You can try raising me for better performance or lowering me if you have
* flaky devices that go off the scsi bus when hit with too many tagged
* commands (like some IBM SCSI-3 LVD drives).
*/
#define AIC7XXX_CMDS_PER_DEVICE 32
typedef struct
{
unsigned char tag_commands[16]; /* Allow for wide/twin adapters. */
} adapter_tag_info_t;
/*
* Make a define that will tell the driver not to the default tag depth
* everywhere.
*/
#define DEFAULT_TAG_COMMANDS {0, 0, 0, 0, 0, 0, 0, 0,\
0, 0, 0, 0, 0, 0, 0, 0}
/*
* Modify this as you see fit for your system. By setting tag_commands
* to 0, the driver will use it's own algorithm for determining the
* number of commands to use (see above). When 255, the driver will
* not enable tagged queueing for that particular device. When positive
* (> 0) and (< 255) the values in the array are used for the queue_depth.
* Note that the maximum value for an entry is 254, but you're insane if
* you try to use that many commands on one device.
*
* In this example, the first line will disable tagged queueing for all
* the devices on the first probed aic7xxx adapter.
*
* The second line enables tagged queueing with 4 commands/LUN for IDs
* (1, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
* driver to use its own algorithm for ID 1.
*
* The third line is the same as the first line.
*
* The fourth line disables tagged queueing for devices 0 and 3. It
* enables tagged queueing for the other IDs, with 16 commands/LUN
* for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
* IDs 2, 5-7, and 9-15.
*/
/*
* NOTE: The below structure is for reference only, the actual structure
* to modify in order to change things is found after this fake one.
*
adapter_tag_info_t aic7xxx_tag_info[] =
{
{DEFAULT_TAG_COMMANDS},
{{4, 0, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 255, 4, 4, 4}},
{DEFAULT_TAG_COMMANDS},
{{255, 16, 4, 255, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
};
*/
static adapter_tag_info_t aic7xxx_tag_info[] =
{
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS}
};
/*
* Define an array of board names that can be indexed by aha_type.
* Don't forget to change this when changing the types!
*/
static const char *board_names[] = {
"AIC-7xxx Unknown", /* AIC_NONE */
"Adaptec AIC-7810 Hardware RAID Controller", /* AIC_7810 */
"Adaptec AIC-7770 SCSI host adapter", /* AIC_7770 */
"Adaptec AHA-274X SCSI host adapter", /* AIC_7771 */
"Adaptec AHA-284X SCSI host adapter", /* AIC_284x */
"Adaptec AIC-7850 SCSI host adapter", /* AIC_7850 */
"Adaptec AIC-7855 SCSI host adapter", /* AIC_7855 */
"Adaptec AIC-7860 Ultra SCSI host adapter", /* AIC_7860 */
"Adaptec AHA-2940A Ultra SCSI host adapter", /* AIC_7861 */
"Adaptec AIC-7870 SCSI host adapter", /* AIC_7870 */
"Adaptec AHA-294X SCSI host adapter", /* AIC_7871 */
"Adaptec AHA-394X SCSI host adapter", /* AIC_7872 */
"Adaptec AHA-398X SCSI host adapter", /* AIC_7873 */
"Adaptec AHA-2944 SCSI host adapter", /* AIC_7874 */
"Adaptec AIC-7880 Ultra SCSI host adapter", /* AIC_7880 */
"Adaptec AHA-294X Ultra SCSI host adapter", /* AIC_7881 */
"Adaptec AHA-394X Ultra SCSI host adapter", /* AIC_7882 */
"Adaptec AHA-398X Ultra SCSI host adapter", /* AIC_7883 */
"Adaptec AHA-2944 Ultra SCSI host adapter", /* AIC_7884 */
"Adaptec AHA-2940UW Pro Ultra SCSI host adapter", /* AIC_7887 */
"Adaptec AIC-7895 Ultra SCSI host adapter", /* AIC_7895 */
"Adaptec AIC-7890/1 Ultra2 SCSI host adapter", /* AIC_7890 */
"Adaptec AHA-293X Ultra2 SCSI host adapter", /* AIC_7890 */
"Adaptec AHA-294X Ultra2 SCSI host adapter", /* AIC_7890 */
"Adaptec AIC-7896/7 Ultra2 SCSI host adapter", /* AIC_7896 */
"Adaptec AHA-394X Ultra2 SCSI host adapter", /* AIC_7897 */
"Adaptec AHA-395X Ultra2 SCSI host adapter", /* AIC_7897 */
"Adaptec PCMCIA SCSI controller", /* card bus stuff */
"Adaptec AIC-7892 Ultra 160/m SCSI host adapter", /* AIC_7892 */
"Adaptec AIC-7899 Ultra 160/m SCSI host adapter", /* AIC_7899 */
};
/*
* There should be a specific return value for this in scsi.h, but
* it seems that most drivers ignore it.
*/
#define DID_UNDERFLOW DID_ERROR
/*
* What we want to do is have the higher level scsi driver requeue
* the command to us. There is no specific driver status for this
* condition, but the higher level scsi driver will requeue the
* command on a DID_BUS_BUSY error.
*
* Upon further inspection and testing, it seems that DID_BUS_BUSY
* will *always* retry the command. We can get into an infinite loop
* if this happens when we really want some sort of counter that
* will automatically abort/reset the command after so many retries.
* Using DID_ERROR will do just that. (Made by a suggestion by
* Doug Ledford 8/1/96)
*/
#define DID_RETRY_COMMAND DID_ERROR
#define HSCSIID 0x07
#define SCSI_RESET 0x040
/*
* EISA/VL-bus stuff
*/
#define MINSLOT 1
#define MAXSLOT 15
#define SLOTBASE(x) ((x) << 12)
#define BASE_TO_SLOT(x) ((x) >> 12)
/*
* Standard EISA Host ID regs (Offset from slot base)
*/
#define AHC_HID0 0x80 /* 0,1: msb of ID2, 2-7: ID1 */
#define AHC_HID1 0x81 /* 0-4: ID3, 5-7: LSB ID2 */
#define AHC_HID2 0x82 /* product */
#define AHC_HID3 0x83 /* firmware revision */
/*
* AIC-7770 I/O range to reserve for a card
*/
#define MINREG 0xC00
#define MAXREG 0xCFF
#define INTDEF 0x5C /* Interrupt Definition Register */
/*
* AIC-78X0 PCI registers
*/
#define CLASS_PROGIF_REVID 0x08
#define DEVREVID 0x000000FFul
#define PROGINFC 0x0000FF00ul
#define SUBCLASS 0x00FF0000ul
#define BASECLASS 0xFF000000ul
#define CSIZE_LATTIME 0x0C
#define CACHESIZE 0x0000003Ful /* only 5 bits */
#define LATTIME 0x0000FF00ul
#define DEVCONFIG 0x40
#define SCBSIZE32 0x00010000ul /* aic789X only */
#define MPORTMODE 0x00000400ul /* aic7870 only */
#define RAMPSM 0x00000200ul /* aic7870 only */
#define RAMPSM_ULTRA2 0x00000004
#define VOLSENSE 0x00000100ul
#define SCBRAMSEL 0x00000080ul
#define SCBRAMSEL_ULTRA2 0x00000008
#define MRDCEN 0x00000040ul
#define EXTSCBTIME 0x00000020ul /* aic7870 only */
#define EXTSCBPEN 0x00000010ul /* aic7870 only */
#define BERREN 0x00000008ul
#define DACEN 0x00000004ul
#define STPWLEVEL 0x00000002ul
#define DIFACTNEGEN 0x00000001ul /* aic7870 only */
#define SCAMCTL 0x1a /* Ultra2 only */
#define CCSCBBADDR 0xf0 /* aic7895/6/7 */
/*
* Define the different types of SEEPROMs on aic7xxx adapters
* and make it also represent the address size used in accessing
* its registers. The 93C46 chips have 1024 bits organized into
* 64 16-bit words, while the 93C56 chips have 2048 bits organized
* into 128 16-bit words. The C46 chips use 6 bits to address
* each word, while the C56 and C66 (4096 bits) use 8 bits to
* address each word.
*/
typedef enum {C46 = 6, C56_66 = 8} seeprom_chip_type;
/*
*
* Define the format of the SEEPROM registers (16 bits).
*
*/
struct seeprom_config {
/*
* SCSI ID Configuration Flags
*/
#define CFXFER 0x0007 /* synchronous transfer rate */
#define CFSYNCH 0x0008 /* enable synchronous transfer */
#define CFDISC 0x0010 /* enable disconnection */
#define CFWIDEB 0x0020 /* wide bus device (wide card) */
#define CFSYNCHISULTRA 0x0040 /* CFSYNC is an ultra offset */
#define CFNEWULTRAFORMAT 0x0080 /* Use the Ultra2 SEEPROM format */
#define CFSTART 0x0100 /* send start unit SCSI command */
#define CFINCBIOS 0x0200 /* include in BIOS scan */
#define CFRNFOUND 0x0400 /* report even if not found */
#define CFMULTILUN 0x0800 /* probe mult luns in BIOS scan */
#define CFWBCACHEYES 0x4000 /* Enable W-Behind Cache on drive */
#define CFWBCACHENC 0xc000 /* Don't change W-Behind Cache */
/* UNUSED 0x3000 */
unsigned short device_flags[16]; /* words 0-15 */
/*
* BIOS Control Bits
*/
#define CFSUPREM 0x0001 /* support all removable drives */
#define CFSUPREMB 0x0002 /* support removable drives for boot only */
#define CFBIOSEN 0x0004 /* BIOS enabled */
/* UNUSED 0x0008 */
#define CFSM2DRV 0x0010 /* support more than two drives */
#define CF284XEXTEND 0x0020 /* extended translation (284x cards) */
/* UNUSED 0x0040 */
#define CFEXTEND 0x0080 /* extended translation enabled */
/* UNUSED 0xFF00 */
unsigned short bios_control; /* word 16 */
/*
* Host Adapter Control Bits
*/
#define CFAUTOTERM 0x0001 /* Perform Auto termination */
#define CFULTRAEN 0x0002 /* Ultra SCSI speed enable (Ultra cards) */
#define CF284XSELTO 0x0003 /* Selection timeout (284x cards) */
#define CF284XFIFO 0x000C /* FIFO Threshold (284x cards) */
#define CFSTERM 0x0004 /* SCSI low byte termination */
#define CFWSTERM 0x0008 /* SCSI high byte termination (wide card) */
#define CFSPARITY 0x0010 /* SCSI parity */
#define CF284XSTERM 0x0020 /* SCSI low byte termination (284x cards) */
#define CFRESETB 0x0040 /* reset SCSI bus at boot */
#define CFBPRIMARY 0x0100 /* Channel B primary on 7895 chipsets */
#define CFSEAUTOTERM 0x0400 /* aic7890 Perform SE Auto Term */
#define CFLVDSTERM 0x0800 /* aic7890 LVD Termination */
/* UNUSED 0xF280 */
unsigned short adapter_control; /* word 17 */
/*
* Bus Release, Host Adapter ID
*/
#define CFSCSIID 0x000F /* host adapter SCSI ID */
/* UNUSED 0x00F0 */
#define CFBRTIME 0xFF00 /* bus release time */
unsigned short brtime_id; /* word 18 */
/*
* Maximum targets
*/
#define CFMAXTARG 0x00FF /* maximum targets */
/* UNUSED 0xFF00 */
unsigned short max_targets; /* word 19 */
unsigned short res_1[11]; /* words 20-30 */
unsigned short checksum; /* word 31 */
};
#define SELBUS_MASK 0x0a
#define SELNARROW 0x00
#define SELBUSB 0x08
#define SINGLE_BUS 0x00
#define SCB_TARGET(scb) \
(((scb)->hscb->target_channel_lun & TID) >> 4)
#define SCB_LUN(scb) \
((scb)->hscb->target_channel_lun & LID)
#define SCB_IS_SCSIBUS_B(scb) \
(((scb)->hscb->target_channel_lun & SELBUSB) != 0)
/*
* If an error occurs during a data transfer phase, run the command
* to completion - it's easier that way - making a note of the error
* condition in this location. This then will modify a DID_OK status
* into an appropriate error for the higher-level SCSI code.
*/
#define aic7xxx_error(cmd) ((cmd)->SCp.Status)
/*
* Keep track of the targets returned status.
*/
#define aic7xxx_status(cmd) ((cmd)->SCp.sent_command)
/*
* The position of the SCSI commands scb within the scb array.
*/
#define aic7xxx_position(cmd) ((cmd)->SCp.have_data_in)
/*
* The stored DMA mapping for single-buffer data transfers.
*/
#define aic7xxx_mapping(cmd) ((cmd)->SCp.phase)
/*
* Get out private data area from a scsi cmd pointer
*/
#define AIC_DEV(cmd) ((struct aic_dev_data *)(cmd)->device->hostdata)
/*
* So we can keep track of our host structs
*/
static struct aic7xxx_host *first_aic7xxx = NULL;
/*
* As of Linux 2.1, the mid-level SCSI code uses virtual addresses
* in the scatter-gather lists. We need to convert the virtual
* addresses to physical addresses.
*/
struct hw_scatterlist {
unsigned int address;
unsigned int length;
};
/*
* Maximum number of SG segments these cards can support.
*/
#define AIC7XXX_MAX_SG 128
/*
* The maximum number of SCBs we could have for ANY type
* of card. DON'T FORGET TO CHANGE THE SCB MASK IN THE
* SEQUENCER CODE IF THIS IS MODIFIED!
*/
#define AIC7XXX_MAXSCB 255
struct aic7xxx_hwscb {
/* ------------ Begin hardware supported fields ---------------- */
/* 0*/ unsigned char control;
/* 1*/ unsigned char target_channel_lun; /* 4/1/3 bits */
/* 2*/ unsigned char target_status;
/* 3*/ unsigned char SG_segment_count;
/* 4*/ unsigned int SG_list_pointer;
/* 8*/ unsigned char residual_SG_segment_count;
/* 9*/ unsigned char residual_data_count[3];
/*12*/ unsigned int data_pointer;
/*16*/ unsigned int data_count;
/*20*/ unsigned int SCSI_cmd_pointer;
/*24*/ unsigned char SCSI_cmd_length;
/*25*/ unsigned char tag; /* Index into our kernel SCB array.
* Also used as the tag for tagged I/O
*/
#define SCB_PIO_TRANSFER_SIZE 26 /* amount we need to upload/download
* via PIO to initialize a transaction.
*/
/*26*/ unsigned char next; /* Used to thread SCBs awaiting selection
* or disconnected down in the sequencer.
*/
/*27*/ unsigned char prev;
/*28*/ unsigned int pad; /*
* Unused by the kernel, but we require
* the padding so that the array of
* hardware SCBs is aligned on 32 byte
* boundaries so the sequencer can index
*/
};
typedef enum {
SCB_FREE = 0x0000,
SCB_DTR_SCB = 0x0001,
SCB_WAITINGQ = 0x0002,
SCB_ACTIVE = 0x0004,
SCB_SENSE = 0x0008,
SCB_ABORT = 0x0010,
SCB_DEVICE_RESET = 0x0020,
SCB_RESET = 0x0040,
SCB_RECOVERY_SCB = 0x0080,
SCB_MSGOUT_PPR = 0x0100,
SCB_MSGOUT_SENT = 0x0200,
SCB_MSGOUT_SDTR = 0x0400,
SCB_MSGOUT_WDTR = 0x0800,
SCB_MSGOUT_BITS = SCB_MSGOUT_PPR |
SCB_MSGOUT_SENT |
SCB_MSGOUT_SDTR |
SCB_MSGOUT_WDTR,
SCB_QUEUED_ABORT = 0x1000,
SCB_QUEUED_FOR_DONE = 0x2000,
SCB_WAS_BUSY = 0x4000,
SCB_QUEUE_FULL = 0x8000
} scb_flag_type;
typedef enum {
AHC_FNONE = 0x00000000,
AHC_PAGESCBS = 0x00000001,
AHC_CHANNEL_B_PRIMARY = 0x00000002,
AHC_USEDEFAULTS = 0x00000004,
AHC_INDIRECT_PAGING = 0x00000008,
AHC_CHNLB = 0x00000020,
AHC_CHNLC = 0x00000040,
AHC_EXTEND_TRANS_A = 0x00000100,
AHC_EXTEND_TRANS_B = 0x00000200,
AHC_TERM_ENB_A = 0x00000400,
AHC_TERM_ENB_SE_LOW = 0x00000400,
AHC_TERM_ENB_B = 0x00000800,
AHC_TERM_ENB_SE_HIGH = 0x00000800,
AHC_HANDLING_REQINITS = 0x00001000,
AHC_TARGETMODE = 0x00002000,
AHC_NEWEEPROM_FMT = 0x00004000,
/*
* Here ends the FreeBSD defined flags and here begins the linux defined
* flags. NOTE: I did not preserve the old flag name during this change
* specifically to force me to evaluate what flags were being used properly
* and what flags weren't. This way, I could clean up the flag usage on
* a use by use basis. Doug Ledford
*/
AHC_MOTHERBOARD = 0x00020000,
AHC_NO_STPWEN = 0x00040000,
AHC_RESET_DELAY = 0x00080000,
AHC_A_SCANNED = 0x00100000,
AHC_B_SCANNED = 0x00200000,
AHC_MULTI_CHANNEL = 0x00400000,
AHC_BIOS_ENABLED = 0x00800000,
AHC_SEEPROM_FOUND = 0x01000000,
AHC_TERM_ENB_LVD = 0x02000000,
AHC_ABORT_PENDING = 0x04000000,
AHC_RESET_PENDING = 0x08000000,
#define AHC_IN_ISR_BIT 28
AHC_IN_ISR = 0x10000000,
AHC_IN_ABORT = 0x20000000,
AHC_IN_RESET = 0x40000000,
AHC_EXTERNAL_SRAM = 0x80000000
} ahc_flag_type;
typedef enum {
AHC_NONE = 0x0000,
AHC_CHIPID_MASK = 0x00ff,
AHC_AIC7770 = 0x0001,
AHC_AIC7850 = 0x0002,
AHC_AIC7860 = 0x0003,
AHC_AIC7870 = 0x0004,
AHC_AIC7880 = 0x0005,
AHC_AIC7890 = 0x0006,
AHC_AIC7895 = 0x0007,
AHC_AIC7896 = 0x0008,
AHC_AIC7892 = 0x0009,
AHC_AIC7899 = 0x000a,
AHC_VL = 0x0100,
AHC_EISA = 0x0200,
AHC_PCI = 0x0400,
} ahc_chip;
typedef enum {
AHC_FENONE = 0x0000,
AHC_ULTRA = 0x0001,
AHC_ULTRA2 = 0x0002,
AHC_WIDE = 0x0004,
AHC_TWIN = 0x0008,
AHC_MORE_SRAM = 0x0010,
AHC_CMD_CHAN = 0x0020,
AHC_QUEUE_REGS = 0x0040,
AHC_SG_PRELOAD = 0x0080,
AHC_SPIOCAP = 0x0100,
AHC_ULTRA3 = 0x0200,
AHC_NEW_AUTOTERM = 0x0400,
AHC_AIC7770_FE = AHC_FENONE,
AHC_AIC7850_FE = AHC_SPIOCAP,
AHC_AIC7860_FE = AHC_ULTRA|AHC_SPIOCAP,
AHC_AIC7870_FE = AHC_FENONE,
AHC_AIC7880_FE = AHC_ULTRA,
AHC_AIC7890_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA2|
AHC_QUEUE_REGS|AHC_SG_PRELOAD|AHC_NEW_AUTOTERM,
AHC_AIC7895_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA,
AHC_AIC7896_FE = AHC_AIC7890_FE,
AHC_AIC7892_FE = AHC_AIC7890_FE|AHC_ULTRA3,
AHC_AIC7899_FE = AHC_AIC7890_FE|AHC_ULTRA3,
} ahc_feature;
#define SCB_DMA_ADDR(scb, addr) ((unsigned long)(addr) + (scb)->scb_dma->dma_offset)
struct aic7xxx_scb_dma {
unsigned long dma_offset; /* Correction you have to add
* to virtual address to get
* dma handle in this region */
dma_addr_t dma_address; /* DMA handle of the start,
* for unmap */
unsigned int dma_len; /* DMA length */
};
typedef enum {
AHC_BUG_NONE = 0x0000,
AHC_BUG_TMODE_WIDEODD = 0x0001,
AHC_BUG_AUTOFLUSH = 0x0002,
AHC_BUG_CACHETHEN = 0x0004,
AHC_BUG_CACHETHEN_DIS = 0x0008,
AHC_BUG_PCI_2_1_RETRY = 0x0010,
AHC_BUG_PCI_MWI = 0x0020,
AHC_BUG_SCBCHAN_UPLOAD = 0x0040,
} ahc_bugs;
struct aic7xxx_scb {
struct aic7xxx_hwscb *hscb; /* corresponding hardware scb */
Scsi_Cmnd *cmd; /* Scsi_Cmnd for this scb */
struct aic7xxx_scb *q_next; /* next scb in queue */
volatile scb_flag_type flags; /* current state of scb */
struct hw_scatterlist *sg_list; /* SG list in adapter format */
unsigned char tag_action;
unsigned char sg_count;
unsigned char *sense_cmd; /*
* Allocate 6 characters for
* sense command.
*/
unsigned char *cmnd;
unsigned int sg_length; /* We init this during buildscb so we
* don't have to calculate anything
* during underflow/overflow/stat code
*/
void *kmalloc_ptr;
struct aic7xxx_scb_dma *scb_dma;
};
/*
* Define a linked list of SCBs.
*/
typedef struct {
struct aic7xxx_scb *head;
struct aic7xxx_scb *tail;
} scb_queue_type;
static struct {
unsigned char errno;
const char *errmesg;
} hard_error[] = {
{ ILLHADDR, "Illegal Host Access" },
{ ILLSADDR, "Illegal Sequencer Address referenced" },
{ ILLOPCODE, "Illegal Opcode in sequencer program" },
{ SQPARERR, "Sequencer Ram Parity Error" },
{ DPARERR, "Data-Path Ram Parity Error" },
{ MPARERR, "Scratch Ram/SCB Array Ram Parity Error" },
{ PCIERRSTAT,"PCI Error detected" },
{ CIOPARERR, "CIOBUS Parity Error" }
};
static unsigned char
generic_sense[] = { REQUEST_SENSE, 0, 0, 0, 255, 0 };
typedef struct {
scb_queue_type free_scbs; /*
* SCBs assigned to free slot on
* card (no paging required)
*/
struct aic7xxx_scb *scb_array[AIC7XXX_MAXSCB];
struct aic7xxx_hwscb *hscbs;
unsigned char numscbs; /* current number of scbs */
unsigned char maxhscbs; /* hardware scbs */
unsigned char maxscbs; /* max scbs including pageable scbs */
dma_addr_t hscbs_dma; /* DMA handle to hscbs */
unsigned int hscbs_dma_len; /* length of the above DMA area */
void *hscb_kmalloc_ptr;
} scb_data_type;
struct target_cmd {
unsigned char mesg_bytes[4];
unsigned char command[28];
};
#define AHC_TRANS_CUR 0x0001
#define AHC_TRANS_ACTIVE 0x0002
#define AHC_TRANS_GOAL 0x0004
#define AHC_TRANS_USER 0x0008
#define AHC_TRANS_QUITE 0x0010
typedef struct {
unsigned char width;
unsigned char period;
unsigned char offset;
unsigned char options;
} transinfo_type;
struct aic_dev_data {
volatile scb_queue_type delayed_scbs;
volatile unsigned short temp_q_depth;
unsigned short max_q_depth;
volatile unsigned char active_cmds;
/*
* Statistics Kept:
*
* Total Xfers (count for each command that has a data xfer),
* broken down by reads && writes.
*
* Further sorted into a few bins for keeping tabs on how many commands
* we get of various sizes.
*
*/
long w_total; /* total writes */
long r_total; /* total reads */
long barrier_total; /* total num of REQ_BARRIER commands */
long ordered_total; /* How many REQ_BARRIER commands we
used ordered tags to satisfy */
long w_bins[6]; /* binned write */
long r_bins[6]; /* binned reads */
transinfo_type cur;
transinfo_type goal;
#define BUS_DEVICE_RESET_PENDING 0x01
#define DEVICE_RESET_DELAY 0x02
#define DEVICE_PRINT_DTR 0x04
#define DEVICE_WAS_BUSY 0x08
#define DEVICE_DTR_SCANNED 0x10
#define DEVICE_SCSI_3 0x20
volatile unsigned char flags;
unsigned needppr:1;
unsigned needppr_copy:1;
unsigned needsdtr:1;
unsigned needsdtr_copy:1;
unsigned needwdtr:1;
unsigned needwdtr_copy:1;
unsigned dtr_pending:1;
struct scsi_device *SDptr;
struct list_head list;
};
/*
* Define a structure used for each host adapter. Note, in order to avoid
* problems with architectures I can't test on (because I don't have one,
* such as the Alpha based systems) which happen to give faults for
* non-aligned memory accesses, care was taken to align this structure
* in a way that gauranteed all accesses larger than 8 bits were aligned
* on the appropriate boundary. It's also organized to try and be more
* cache line efficient. Be careful when changing this lest you might hurt
* overall performance and bring down the wrath of the masses.
*/
struct aic7xxx_host {
/*
* This is the first 64 bytes in the host struct
*/
/*
* We are grouping things here....first, items that get either read or
* written with nearly every interrupt
*/
volatile long flags;
ahc_feature features; /* chip features */
unsigned long base; /* card base address */
volatile unsigned char __iomem *maddr; /* memory mapped address */
unsigned long isr_count; /* Interrupt count */
unsigned long spurious_int;
scb_data_type *scb_data;
struct aic7xxx_cmd_queue {
Scsi_Cmnd *head;
Scsi_Cmnd *tail;
} completeq;
/*
* Things read/written on nearly every entry into aic7xxx_queue()
*/
volatile scb_queue_type waiting_scbs;
unsigned char unpause; /* unpause value for HCNTRL */
unsigned char pause; /* pause value for HCNTRL */
volatile unsigned char qoutfifonext;
volatile unsigned char activescbs; /* active scbs */
volatile unsigned char max_activescbs;
volatile unsigned char qinfifonext;
volatile unsigned char *untagged_scbs;
volatile unsigned char *qoutfifo;
volatile unsigned char *qinfifo;
unsigned char dev_last_queue_full[MAX_TARGETS];
unsigned char dev_last_queue_full_count[MAX_TARGETS];
unsigned short ultraenb; /* Gets downloaded to card as a
bitmap */
unsigned short discenable; /* Gets downloaded to card as a
bitmap */
transinfo_type user[MAX_TARGETS];
unsigned char msg_buf[13]; /* The message for the target */
unsigned char msg_type;
#define MSG_TYPE_NONE 0x00
#define MSG_TYPE_INITIATOR_MSGOUT 0x01
#define MSG_TYPE_INITIATOR_MSGIN 0x02
unsigned char msg_len; /* Length of message */
unsigned char msg_index; /* Index into msg_buf array */
/*
* We put the less frequently used host structure items after the more
* frequently used items to try and ease the burden on the cache subsystem.
* These entries are not *commonly* accessed, whereas the preceding entries
* are accessed very often.
*/
unsigned int irq; /* IRQ for this adapter */
int instance; /* aic7xxx instance number */
int scsi_id; /* host adapter SCSI ID */
int scsi_id_b; /* channel B for twin adapters */
unsigned int bios_address;
int board_name_index;
unsigned short bios_control; /* bios control - SEEPROM */
unsigned short adapter_control; /* adapter control - SEEPROM */
struct pci_dev *pdev;
unsigned char pci_bus;
unsigned char pci_device_fn;
struct seeprom_config sc;
unsigned short sc_type;
unsigned short sc_size;
struct aic7xxx_host *next; /* allow for multiple IRQs */
struct Scsi_Host *host; /* pointer to scsi host */
struct list_head aic_devs; /* all aic_dev structs on host */
int host_no; /* SCSI host number */
unsigned long mbase; /* I/O memory address */
ahc_chip chip; /* chip type */
ahc_bugs bugs;
dma_addr_t fifo_dma; /* DMA handle for fifo arrays */
};
/*
* Valid SCSIRATE values. (p. 3-17)
* Provides a mapping of transfer periods in ns/4 to the proper value to
* stick in the SCSIRATE reg to use that transfer rate.
*/
#define AHC_SYNCRATE_ULTRA3 0
#define AHC_SYNCRATE_ULTRA2 1
#define AHC_SYNCRATE_ULTRA 3
#define AHC_SYNCRATE_FAST 6
#define AHC_SYNCRATE_CRC 0x40
#define AHC_SYNCRATE_SE 0x10
static struct aic7xxx_syncrate {
/* Rates in Ultra mode have bit 8 of sxfr set */
#define ULTRA_SXFR 0x100
int sxfr_ultra2;
int sxfr;
unsigned char period;
const char *rate[2];
} aic7xxx_syncrates[] = {
{ 0x42, 0x000, 9, {"80.0", "160.0"} },
{ 0x13, 0x000, 10, {"40.0", "80.0"} },
{ 0x14, 0x000, 11, {"33.0", "66.6"} },
{ 0x15, 0x100, 12, {"20.0", "40.0"} },
{ 0x16, 0x110, 15, {"16.0", "32.0"} },
{ 0x17, 0x120, 18, {"13.4", "26.8"} },
{ 0x18, 0x000, 25, {"10.0", "20.0"} },
{ 0x19, 0x010, 31, {"8.0", "16.0"} },
{ 0x1a, 0x020, 37, {"6.67", "13.3"} },
{ 0x1b, 0x030, 43, {"5.7", "11.4"} },
{ 0x10, 0x040, 50, {"5.0", "10.0"} },
{ 0x00, 0x050, 56, {"4.4", "8.8" } },
{ 0x00, 0x060, 62, {"4.0", "8.0" } },
{ 0x00, 0x070, 68, {"3.6", "7.2" } },
{ 0x00, 0x000, 0, {NULL, NULL} },
};
#define CTL_OF_SCB(scb) (((scb->hscb)->target_channel_lun >> 3) & 0x1), \
(((scb->hscb)->target_channel_lun >> 4) & 0xf), \
((scb->hscb)->target_channel_lun & 0x07)
#define CTL_OF_CMD(cmd) ((cmd->device->channel) & 0x01), \
((cmd->device->id) & 0x0f), \
((cmd->device->lun) & 0x07)
#define TARGET_INDEX(cmd) ((cmd)->device->id | ((cmd)->device->channel << 3))
/*
* A nice little define to make doing our printks a little easier
*/
#define WARN_LEAD KERN_WARNING "(scsi%d:%d:%d:%d) "
#define INFO_LEAD KERN_INFO "(scsi%d:%d:%d:%d) "
/*
* XXX - these options apply unilaterally to _all_ 274x/284x/294x
* cards in the system. This should be fixed. Exceptions to this
* rule are noted in the comments.
*/
/*
* Use this as the default queue depth when setting tagged queueing on.
*/
static unsigned int aic7xxx_default_queue_depth = AIC7XXX_CMDS_PER_DEVICE;
/*
* Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
* has no effect on any later resets that might occur due to things like
* SCSI bus timeouts.
*/
static unsigned int aic7xxx_no_reset = 0;
/*
* Certain PCI motherboards will scan PCI devices from highest to lowest,
* others scan from lowest to highest, and they tend to do all kinds of
* strange things when they come into contact with PCI bridge chips. The
* net result of all this is that the PCI card that is actually used to boot
* the machine is very hard to detect. Most motherboards go from lowest
* PCI slot number to highest, and the first SCSI controller found is the
* one you boot from. The only exceptions to this are when a controller
* has its BIOS disabled. So, we by default sort all of our SCSI controllers
* from lowest PCI slot number to highest PCI slot number. We also force
* all controllers with their BIOS disabled to the end of the list. This
* works on *almost* all computers. Where it doesn't work, we have this
* option. Setting this option to non-0 will reverse the order of the sort
* to highest first, then lowest, but will still leave cards with their BIOS
* disabled at the very end. That should fix everyone up unless there are
* really strange cirumstances.
*/
static int aic7xxx_reverse_scan = 0;
/*
* Should we force EXTENDED translation on a controller.
* 0 == Use whatever is in the SEEPROM or default to off
* 1 == Use whatever is in the SEEPROM or default to on
*/
static unsigned int aic7xxx_extended = 0;
/*
* The IRQ trigger method used on EISA controllers. Does not effect PCI cards.
* -1 = Use detected settings.
* 0 = Force Edge triggered mode.
* 1 = Force Level triggered mode.
*/
static int aic7xxx_irq_trigger = -1;
/*
* This variable is used to override the termination settings on a controller.
* This should not be used under normal conditions. However, in the case
* that a controller does not have a readable SEEPROM (so that we can't
* read the SEEPROM settings directly) and that a controller has a buggered
* version of the cable detection logic, this can be used to force the
* correct termination. It is preferable to use the manual termination
* settings in the BIOS if possible, but some motherboard controllers store
* those settings in a format we can't read. In other cases, auto term
* should also work, but the chipset was put together with no auto term
* logic (common on motherboard controllers). In those cases, we have
* 32 bits here to work with. That's good for 8 controllers/channels. The
* bits are organized as 4 bits per channel, with scsi0 getting the lowest
* 4 bits in the int. A 1 in a bit position indicates the termination setting
* that corresponds to that bit should be enabled, a 0 is disabled.
* It looks something like this:
*
* 0x0f = 1111-Single Ended Low Byte Termination on/off
* ||\-Single Ended High Byte Termination on/off
* |\-LVD Low Byte Termination on/off
* \-LVD High Byte Termination on/off
*
* For non-Ultra2 controllers, the upper 2 bits are not important. So, to
* enable both high byte and low byte termination on scsi0, I would need to
* make sure that the override_term variable was set to 0x03 (bits 0011).
* To make sure that all termination is enabled on an Ultra2 controller at
* scsi2 and only high byte termination on scsi1 and high and low byte
* termination on scsi0, I would set override_term=0xf23 (bits 1111 0010 0011)
*
* For the most part, users should never have to use this, that's why I
* left it fairly cryptic instead of easy to understand. If you need it,
* most likely someone will be telling you what your's needs to be set to.
*/
static int aic7xxx_override_term = -1;
/*
* Certain motherboard chipset controllers tend to screw
* up the polarity of the term enable output pin. Use this variable
* to force the correct polarity for your system. This is a bitfield variable
* similar to the previous one, but this one has one bit per channel instead
* of four.
* 0 = Force the setting to active low.
* 1 = Force setting to active high.
* Most Adaptec cards are active high, several motherboards are active low.
* To force a 2940 card at SCSI 0 to active high and a motherboard 7895
* controller at scsi1 and scsi2 to active low, and a 2910 card at scsi3
* to active high, you would need to set stpwlev=0x9 (bits 1001).
*
* People shouldn't need to use this, but if you are experiencing lots of
* SCSI timeout problems, this may help. There is one sure way to test what
* this option needs to be. Using a boot floppy to boot the system, configure
* your system to enable all SCSI termination (in the Adaptec SCSI BIOS) and
* if needed then also pass a value to override_term to make sure that the
* driver is enabling SCSI termination, then set this variable to either 0
* or 1. When the driver boots, make sure there are *NO* SCSI cables
* connected to your controller. If it finds and inits the controller
* without problem, then the setting you passed to stpwlev was correct. If
* the driver goes into a reset loop and hangs the system, then you need the
* other setting for this variable. If neither setting lets the machine
* boot then you have definite termination problems that may not be fixable.
*/
static int aic7xxx_stpwlev = -1;
/*
* Set this to non-0 in order to force the driver to panic the kernel
* and print out debugging info on a SCSI abort or reset cycle.
*/
static int aic7xxx_panic_on_abort = 0;
/*
* PCI bus parity checking of the Adaptec controllers. This is somewhat
* dubious at best. To my knowledge, this option has never actually
* solved a PCI parity problem, but on certain machines with broken PCI
* chipset configurations, it can generate tons of false error messages.
* It's included in the driver for completeness.
* 0 = Shut off PCI parity check
* -1 = Normal polarity pci parity checking
* 1 = reverse polarity pci parity checking
*
* NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
* variable to -1 you would actually want to simply pass the variable
* name without a number. That will invert the 0 which will result in
* -1.
*/
static int aic7xxx_pci_parity = 0;
/*
* Set this to any non-0 value to cause us to dump the contents of all
* the card's registers in a hex dump format tailored to each model of
* controller.
*
* NOTE: THE CONTROLLER IS LEFT IN AN UNUSEABLE STATE BY THIS OPTION.
* YOU CANNOT BOOT UP WITH THIS OPTION, IT IS FOR DEBUGGING PURPOSES
* ONLY
*/
static int aic7xxx_dump_card = 0;
/*
* Set this to a non-0 value to make us dump out the 32 bit instruction
* registers on the card after completing the sequencer download. This
* allows the actual sequencer download to be verified. It is possible
* to use this option and still boot up and run your system. This is
* only intended for debugging purposes.
*/
static int aic7xxx_dump_sequencer = 0;
/*
* Certain newer motherboards have put new PCI based devices into the
* IO spaces that used to typically be occupied by VLB or EISA cards.
* This overlap can cause these newer motherboards to lock up when scanned
* for older EISA and VLB devices. Setting this option to non-0 will
* cause the driver to skip scanning for any VLB or EISA controllers and
* only support the PCI controllers. NOTE: this means that if the kernel
* os compiled with PCI support disabled, then setting this to non-0
* would result in never finding any devices :)
*/
static int aic7xxx_no_probe = 0;
/*
* On some machines, enabling the external SCB RAM isn't reliable yet. I
* haven't had time to make test patches for things like changing the
* timing mode on that external RAM either. Some of those changes may
* fix the problem. Until then though, we default to external SCB RAM
* off and give a command line option to enable it.
*/
static int aic7xxx_scbram = 0;
/*
* So that we can set how long each device is given as a selection timeout.
* The table of values goes like this:
* 0 - 256ms
* 1 - 128ms
* 2 - 64ms
* 3 - 32ms
* We default to 64ms because it's fast. Some old SCSI-I devices need a
* longer time. The final value has to be left shifted by 3, hence 0x10
* is the final value.
*/
static int aic7xxx_seltime = 0x10;
/*
* So that insmod can find the variable and make it point to something
*/
#ifdef MODULE
static char * aic7xxx = NULL;
module_param(aic7xxx, charp, 0);
#endif
#define VERBOSE_NORMAL 0x0000
#define VERBOSE_NEGOTIATION 0x0001
#define VERBOSE_SEQINT 0x0002
#define VERBOSE_SCSIINT 0x0004
#define VERBOSE_PROBE 0x0008
#define VERBOSE_PROBE2 0x0010
#define VERBOSE_NEGOTIATION2 0x0020
#define VERBOSE_MINOR_ERROR 0x0040
#define VERBOSE_TRACING 0x0080
#define VERBOSE_ABORT 0x0f00
#define VERBOSE_ABORT_MID 0x0100
#define VERBOSE_ABORT_FIND 0x0200
#define VERBOSE_ABORT_PROCESS 0x0400
#define VERBOSE_ABORT_RETURN 0x0800
#define VERBOSE_RESET 0xf000
#define VERBOSE_RESET_MID 0x1000
#define VERBOSE_RESET_FIND 0x2000
#define VERBOSE_RESET_PROCESS 0x4000
#define VERBOSE_RESET_RETURN 0x8000
static int aic7xxx_verbose = VERBOSE_NORMAL | VERBOSE_NEGOTIATION |
VERBOSE_PROBE; /* verbose messages */
/****************************************************************************
*
* We're going to start putting in function declarations so that order of
* functions is no longer important. As needed, they are added here.
*
***************************************************************************/
static int aic7xxx_release(struct Scsi_Host *host);
static void aic7xxx_set_syncrate(struct aic7xxx_host *p,
struct aic7xxx_syncrate *syncrate, int target, int channel,
unsigned int period, unsigned int offset, unsigned char options,
unsigned int type, struct aic_dev_data *aic_dev);
static void aic7xxx_set_width(struct aic7xxx_host *p, int target, int channel,
int lun, unsigned int width, unsigned int type,
struct aic_dev_data *aic_dev);
static void aic7xxx_panic_abort(struct aic7xxx_host *p, Scsi_Cmnd *cmd);
static void aic7xxx_print_card(struct aic7xxx_host *p);
static void aic7xxx_print_scratch_ram(struct aic7xxx_host *p);
static void aic7xxx_print_sequencer(struct aic7xxx_host *p, int downloaded);
#ifdef AIC7XXX_VERBOSE_DEBUGGING
static void aic7xxx_check_scbs(struct aic7xxx_host *p, char *buffer);
#endif
/****************************************************************************
*
* These functions are now used. They happen to be wrapped in useless
* inb/outb port read/writes around the real reads and writes because it
* seems that certain very fast CPUs have a problem dealing with us when
* going at full speed.
*
***************************************************************************/
static inline unsigned char
aic_inb(struct aic7xxx_host *p, long port)
{
#ifdef MMAPIO
unsigned char x;
if(p->maddr)
{
x = readb(p->maddr + port);
}
else
{
x = inb(p->base + port);
}
return(x);
#else
return(inb(p->base + port));
#endif
}
static inline void
aic_outb(struct aic7xxx_host *p, unsigned char val, long port)
{
#ifdef MMAPIO
if(p->maddr)
{
writeb(val, p->maddr + port);
mb(); /* locked operation in order to force CPU ordering */
readb(p->maddr + HCNTRL); /* dummy read to flush the PCI write */
}
else
{
outb(val, p->base + port);
mb(); /* locked operation in order to force CPU ordering */
}
#else
outb(val, p->base + port);
mb(); /* locked operation in order to force CPU ordering */
#endif
}
/*+F*************************************************************************
* Function:
* aic7xxx_setup
*
* Description:
* Handle Linux boot parameters. This routine allows for assigning a value
* to a parameter with a ':' between the parameter and the value.
* ie. aic7xxx=unpause:0x0A,extended
*-F*************************************************************************/
static int
aic7xxx_setup(char *s)
{
int i, n;
char *p;
char *end;
static struct {
const char *name;
unsigned int *flag;
} options[] = {
{ "extended", &aic7xxx_extended },
{ "no_reset", &aic7xxx_no_reset },
{ "irq_trigger", &aic7xxx_irq_trigger },
{ "verbose", &aic7xxx_verbose },
{ "reverse_scan",&aic7xxx_reverse_scan },
{ "override_term", &aic7xxx_override_term },
{ "stpwlev", &aic7xxx_stpwlev },
{ "no_probe", &aic7xxx_no_probe },
{ "panic_on_abort", &aic7xxx_panic_on_abort },
{ "pci_parity", &aic7xxx_pci_parity },
{ "dump_card", &aic7xxx_dump_card },
{ "dump_sequencer", &aic7xxx_dump_sequencer },
{ "default_queue_depth", &aic7xxx_default_queue_depth },
{ "scbram", &aic7xxx_scbram },
{ "seltime", &aic7xxx_seltime },
{ "tag_info", NULL }
};
end = strchr(s, '\0');
while ((p = strsep(&s, ",.")) != NULL)
{
for (i = 0; i < ARRAY_SIZE(options); i++)
{
n = strlen(options[i].name);
if (!strncmp(options[i].name, p, n))
{
if (!strncmp(p, "tag_info", n))
{
if (p[n] == ':')
{
char *base;
char *tok, *tok_end, *tok_end2;
char tok_list[] = { '.', ',', '{', '}', '\0' };
int i, instance = -1, device = -1;
unsigned char done = FALSE;
base = p;
tok = base + n + 1; /* Forward us just past the ':' */
tok_end = strchr(tok, '\0');
if (tok_end < end)
*tok_end = ',';
while(!done)
{
switch(*tok)
{
case '{':
if (instance == -1)
instance = 0;
else if (device == -1)
device = 0;
tok++;
break;
case '}':
if (device != -1)
device = -1;
else if (instance != -1)
instance = -1;
tok++;
break;
case ',':
case '.':
if (instance == -1)
done = TRUE;
else if (device >= 0)
device++;
else if (instance >= 0)
instance++;
if ( (device >= MAX_TARGETS) ||
(instance >= ARRAY_SIZE(aic7xxx_tag_info)) )
done = TRUE;
tok++;
if (!done)
{
base = tok;
}
break;
case '\0':
done = TRUE;
break;
default:
done = TRUE;
tok_end = strchr(tok, '\0');
for(i=0; tok_list[i]; i++)
{
tok_end2 = strchr(tok, tok_list[i]);
if ( (tok_end2) && (tok_end2 < tok_end) )
{
tok_end = tok_end2;
done = FALSE;
}
}
if ( (instance >= 0) && (device >= 0) &&
(instance < ARRAY_SIZE(aic7xxx_tag_info)) &&
(device < MAX_TARGETS) )
aic7xxx_tag_info[instance].tag_commands[device] =
simple_strtoul(tok, NULL, 0) & 0xff;
tok = tok_end;
break;
}
}
while((p != base) && (p != NULL))
p = strsep(&s, ",.");
}
}
else if (p[n] == ':')
{
*(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
if(!strncmp(p, "seltime", n))
{
*(options[i].flag) = (*(options[i].flag) % 4) << 3;
}
}
else if (!strncmp(p, "verbose", n))
{
*(options[i].flag) = 0xff29;
}
else
{
*(options[i].flag) = ~(*(options[i].flag));
if(!strncmp(p, "seltime", n))
{
*(options[i].flag) = (*(options[i].flag) % 4) << 3;
}
}
}
}
}
return 1;
}
__setup("aic7xxx=", aic7xxx_setup);
/*+F*************************************************************************
* Function:
* pause_sequencer
*
* Description:
* Pause the sequencer and wait for it to actually stop - this
* is important since the sequencer can disable pausing for critical
* sections.
*-F*************************************************************************/
static void
pause_sequencer(struct aic7xxx_host *p)
{
aic_outb(p, p->pause, HCNTRL);
while ((aic_inb(p, HCNTRL) & PAUSE) == 0)
{
;
}
if(p->features & AHC_ULTRA2)
{
aic_inb(p, CCSCBCTL);
}
}
/*+F*************************************************************************
* Function:
* unpause_sequencer
*
* Description:
* Unpause the sequencer. Unremarkable, yet done often enough to
* warrant an easy way to do it.
*-F*************************************************************************/
static void
unpause_sequencer(struct aic7xxx_host *p, int unpause_always)
{
if (unpause_always ||
( !(aic_inb(p, INTSTAT) & (SCSIINT | SEQINT | BRKADRINT)) &&
!(p->flags & AHC_HANDLING_REQINITS) ) )
{
aic_outb(p, p->unpause, HCNTRL);
}
}
/*+F*************************************************************************
* Function:
* restart_sequencer
*
* Description:
* Restart the sequencer program from address zero. This assumes
* that the sequencer is already paused.
*-F*************************************************************************/
static void
restart_sequencer(struct aic7xxx_host *p)
{
aic_outb(p, 0, SEQADDR0);
aic_outb(p, 0, SEQADDR1);
aic_outb(p, FASTMODE, SEQCTL);
}
/*
* We include the aic7xxx_seq.c file here so that the other defines have
* already been made, and so that it comes before the code that actually
* downloads the instructions (since we don't typically use function
* prototype, our code has to be ordered that way, it's a left-over from
* the original driver days.....I should fix it some time DL).
*/
#include "aic7xxx_old/aic7xxx_seq.c"
/*+F*************************************************************************
* Function:
* aic7xxx_check_patch
*
* Description:
* See if the next patch to download should be downloaded.
*-F*************************************************************************/
static int
aic7xxx_check_patch(struct aic7xxx_host *p,
struct sequencer_patch **start_patch, int start_instr, int *skip_addr)
{
struct sequencer_patch *cur_patch;
struct sequencer_patch *last_patch;
int num_patches;
num_patches = sizeof(sequencer_patches)/sizeof(struct sequencer_patch);
last_patch = &sequencer_patches[num_patches];
cur_patch = *start_patch;
while ((cur_patch < last_patch) && (start_instr == cur_patch->begin))
{
if (cur_patch->patch_func(p) == 0)
{
/*
* Start rejecting code.
*/
*skip_addr = start_instr + cur_patch->skip_instr;
cur_patch += cur_patch->skip_patch;
}
else
{
/*
* Found an OK patch. Advance the patch pointer to the next patch
* and wait for our instruction pointer to get here.
*/
cur_patch++;
}
}
*start_patch = cur_patch;
if (start_instr < *skip_addr)
/*
* Still skipping
*/
return (0);
return(1);
}
/*+F*************************************************************************
* Function:
* aic7xxx_download_instr
*
* Description:
* Find the next patch to download.
*-F*************************************************************************/
static void
aic7xxx_download_instr(struct aic7xxx_host *p, int instrptr,
unsigned char *dconsts)
{
union ins_formats instr;
struct ins_format1 *fmt1_ins;
struct ins_format3 *fmt3_ins;
unsigned char opcode;
instr = *(union ins_formats*) &seqprog[instrptr * 4];
instr.integer = le32_to_cpu(instr.integer);
fmt1_ins = &instr.format1;
fmt3_ins = NULL;
/* Pull the opcode */
opcode = instr.format1.opcode;
switch (opcode)
{
case AIC_OP_JMP:
case AIC_OP_JC:
case AIC_OP_JNC:
case AIC_OP_CALL:
case AIC_OP_JNE:
case AIC_OP_JNZ:
case AIC_OP_JE:
case AIC_OP_JZ:
{
struct sequencer_patch *cur_patch;
int address_offset;
unsigned int address;
int skip_addr;
int i;
fmt3_ins = &instr.format3;
address_offset = 0;
address = fmt3_ins->address;
cur_patch = sequencer_patches;
skip_addr = 0;
for (i = 0; i < address;)
{
aic7xxx_check_patch(p, &cur_patch, i, &skip_addr);
if (skip_addr > i)
{
int end_addr;
end_addr = min_t(int, address, skip_addr);
address_offset += end_addr - i;
i = skip_addr;
}
else
{
i++;
}
}
address -= address_offset;
fmt3_ins->address = address;
/* Fall Through to the next code section */
}
case AIC_OP_OR:
case AIC_OP_AND:
case AIC_OP_XOR:
case AIC_OP_ADD:
case AIC_OP_ADC:
case AIC_OP_BMOV:
if (fmt1_ins->parity != 0)
{
fmt1_ins->immediate = dconsts[fmt1_ins->immediate];
}
fmt1_ins->parity = 0;
/* Fall Through to the next code section */
case AIC_OP_ROL:
if ((p->features & AHC_ULTRA2) != 0)
{
int i, count;
/* Calculate odd parity for the instruction */
for ( i=0, count=0; i < 31; i++)
{
unsigned int mask;
mask = 0x01 << i;
if ((instr.integer & mask) != 0)
count++;
}
if (!(count & 0x01))
instr.format1.parity = 1;
}
else
{
if (fmt3_ins != NULL)
{
instr.integer = fmt3_ins->immediate |
(fmt3_ins->source << 8) |
(fmt3_ins->address << 16) |
(fmt3_ins->opcode << 25);
}
else
{
instr.integer = fmt1_ins->immediate |
(fmt1_ins->source << 8) |
(fmt1_ins->destination << 16) |
(fmt1_ins->ret << 24) |
(fmt1_ins->opcode << 25);
}
}
aic_outb(p, (instr.integer & 0xff), SEQRAM);
aic_outb(p, ((instr.integer >> 8) & 0xff), SEQRAM);
aic_outb(p, ((instr.integer >> 16) & 0xff), SEQRAM);
aic_outb(p, ((instr.integer >> 24) & 0xff), SEQRAM);
udelay(10);
break;
default:
panic("aic7xxx: Unknown opcode encountered in sequencer program.");
break;
}
}
/*+F*************************************************************************
* Function:
* aic7xxx_loadseq
*
* Description:
* Load the sequencer code into the controller memory.
*-F*************************************************************************/
static void
aic7xxx_loadseq(struct aic7xxx_host *p)
{
struct sequencer_patch *cur_patch;
int i;
int downloaded;
int skip_addr;
unsigned char download_consts[4] = {0, 0, 0, 0};
if (aic7xxx_verbose & VERBOSE_PROBE)
{
printk(KERN_INFO "(scsi%d) Downloading sequencer code...", p->host_no);
}
#if 0
download_consts[TMODE_NUMCMDS] = p->num_targetcmds;
#endif
download_consts[TMODE_NUMCMDS] = 0;
cur_patch = &sequencer_patches[0];
downloaded = 0;
skip_addr = 0;
aic_outb(p, PERRORDIS|LOADRAM|FAILDIS|FASTMODE, SEQCTL);
aic_outb(p, 0, SEQADDR0);
aic_outb(p, 0, SEQADDR1);
for (i = 0; i < sizeof(seqprog) / 4; i++)
{
if (aic7xxx_check_patch(p, &cur_patch, i, &skip_addr) == 0)
{
/* Skip this instruction for this configuration. */
continue;
}
aic7xxx_download_instr(p, i, &download_consts[0]);
downloaded++;
}
aic_outb(p, 0, SEQADDR0);
aic_outb(p, 0, SEQADDR1);
aic_outb(p, FASTMODE | FAILDIS, SEQCTL);
unpause_sequencer(p, TRUE);
mdelay(1);
pause_sequencer(p);
aic_outb(p, FASTMODE, SEQCTL);
if (aic7xxx_verbose & VERBOSE_PROBE)
{
printk(" %d instructions downloaded\n", downloaded);
}
if (aic7xxx_dump_sequencer)
aic7xxx_print_sequencer(p, downloaded);
}
/*+F*************************************************************************
* Function:
* aic7xxx_print_sequencer
*
* Description:
* Print the contents of the sequencer memory to the screen.
*-F*************************************************************************/
static void
aic7xxx_print_sequencer(struct aic7xxx_host *p, int downloaded)
{
int i, k, temp;
aic_outb(p, PERRORDIS|LOADRAM|FAILDIS|FASTMODE, SEQCTL);
aic_outb(p, 0, SEQADDR0);
aic_outb(p, 0, SEQADDR1);
k = 0;
for (i=0; i < downloaded; i++)
{
if ( k == 0 )
printk("%03x: ", i);
temp = aic_inb(p, SEQRAM);
temp |= (aic_inb(p, SEQRAM) << 8);
temp |= (aic_inb(p, SEQRAM) << 16);
temp |= (aic_inb(p, SEQRAM) << 24);
printk("%08x", temp);
if ( ++k == 8 )
{
printk("\n");
k = 0;
}
else
printk(" ");
}
aic_outb(p, 0, SEQADDR0);
aic_outb(p, 0, SEQADDR1);
aic_outb(p, FASTMODE | FAILDIS, SEQCTL);
unpause_sequencer(p, TRUE);
mdelay(1);
pause_sequencer(p);
aic_outb(p, FASTMODE, SEQCTL);
printk("\n");
}
/*+F*************************************************************************
* Function:
* aic7xxx_info
*
* Description:
* Return a string describing the driver.
*-F*************************************************************************/
static const char *
aic7xxx_info(struct Scsi_Host *dooh)
{
static char buffer[256];
char *bp;
struct aic7xxx_host *p;
bp = &buffer[0];
p = (struct aic7xxx_host *)dooh->hostdata;
memset(bp, 0, sizeof(buffer));
strcpy(bp, "Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) ");
strcat(bp, AIC7XXX_C_VERSION);
strcat(bp, "/");
strcat(bp, AIC7XXX_H_VERSION);
strcat(bp, "\n");
strcat(bp, " <");
strcat(bp, board_names[p->board_name_index]);
strcat(bp, ">");
return(bp);
}
/*+F*************************************************************************
* Function:
* aic7xxx_find_syncrate
*
* Description:
* Look up the valid period to SCSIRATE conversion in our table
*-F*************************************************************************/
static struct aic7xxx_syncrate *
aic7xxx_find_syncrate(struct aic7xxx_host *p, unsigned int *period,
unsigned int maxsync, unsigned char *options)
{
struct aic7xxx_syncrate *syncrate;
int done = FALSE;
switch(*options)
{
case MSG_EXT_PPR_OPTION_DT_CRC:
case MSG_EXT_PPR_OPTION_DT_UNITS:
if(!(p->features & AHC_ULTRA3))
{
*options = 0;
maxsync = max_t(unsigned int, maxsync, AHC_SYNCRATE_ULTRA2);
}
break;
case MSG_EXT_PPR_OPTION_DT_CRC_QUICK:
case MSG_EXT_PPR_OPTION_DT_UNITS_QUICK:
if(!(p->features & AHC_ULTRA3))
{
*options = 0;
maxsync = max_t(unsigned int, maxsync, AHC_SYNCRATE_ULTRA2);
}
else
{
/*
* we don't support the Quick Arbitration variants of dual edge
* clocking. As it turns out, we want to send back the
* same basic option, but without the QA attribute.
* We know that we are responding because we would never set
* these options ourself, we would only respond to them.
*/
switch(*options)
{
case MSG_EXT_PPR_OPTION_DT_CRC_QUICK:
*options = MSG_EXT_PPR_OPTION_DT_CRC;
break;
case MSG_EXT_PPR_OPTION_DT_UNITS_QUICK:
*options = MSG_EXT_PPR_OPTION_DT_UNITS;
break;
}
}
break;
default:
*options = 0;
maxsync = max_t(unsigned int, maxsync, AHC_SYNCRATE_ULTRA2);
break;
}
syncrate = &aic7xxx_syncrates[maxsync];
while ( (syncrate->rate[0] != NULL) &&
(!(p->features & AHC_ULTRA2) || syncrate->sxfr_ultra2) )
{
if (*period <= syncrate->period)
{
switch(*options)
{
case MSG_EXT_PPR_OPTION_DT_CRC:
case MSG_EXT_PPR_OPTION_DT_UNITS:
if(!(syncrate->sxfr_ultra2 & AHC_SYNCRATE_CRC))
{
done = TRUE;
/*
* oops, we went too low for the CRC/DualEdge signalling, so
* clear the options byte
*/
*options = 0;
/*
* We'll be sending a reply to this packet to set the options
* properly, so unilaterally set the period as well.
*/
*period = syncrate->period;
}
else
{
done = TRUE;
if(syncrate == &aic7xxx_syncrates[maxsync])
{
*period = syncrate->period;
}
}
break;
default:
if(!(syncrate->sxfr_ultra2 & AHC_SYNCRATE_CRC))
{
done = TRUE;
if(syncrate == &aic7xxx_syncrates[maxsync])
{
*period = syncrate->period;
}
}
break;
}
if(done)
{
break;
}
}
syncrate++;
}
if ( (*period == 0) || (syncrate->rate[0] == NULL) ||
((p->features & AHC_ULTRA2) && (syncrate->sxfr_ultra2 == 0)) )
{
/*
* Use async transfers for this target
*/
*options = 0;
*period = 255;
syncrate = NULL;
}
return (syncrate);
}
/*+F*************************************************************************
* Function:
* aic7xxx_find_period
*
* Description:
* Look up the valid SCSIRATE to period conversion in our table
*-F*************************************************************************/
static unsigned int
aic7xxx_find_period(struct aic7xxx_host *p, unsigned int scsirate,
unsigned int maxsync)
{
struct aic7xxx_syncrate *syncrate;
if (p->features & AHC_ULTRA2)
{
scsirate &= SXFR_ULTRA2;
}
else
{
scsirate &= SXFR;
}
syncrate = &aic7xxx_syncrates[maxsync];
while (syncrate->rate[0] != NULL)
{
if (p->features & AHC_ULTRA2)
{
if (syncrate->sxfr_ultra2 == 0)
break;
else if (scsirate == syncrate->sxfr_ultra2)
return (syncrate->period);
else if (scsirate == (syncrate->sxfr_ultra2 & ~AHC_SYNCRATE_CRC))
return (syncrate->period);
}
else if (scsirate == (syncrate->sxfr & ~ULTRA_SXFR))
{
return (syncrate->period);
}
syncrate++;
}
return (0); /* async */
}
/*+F*************************************************************************
* Function:
* aic7xxx_validate_offset
*
* Description:
* Set a valid offset value for a particular card in use and transfer
* settings in use.
*-F*************************************************************************/
static void
aic7xxx_validate_offset(struct aic7xxx_host *p,
struct aic7xxx_syncrate *syncrate, unsigned int *offset, int wide)
{
unsigned int maxoffset;
/* Limit offset to what the card (and device) can do */
if (syncrate == NULL)
{
maxoffset = 0;
}
else if (p->features & AHC_ULTRA2)
{
maxoffset = MAX_OFFSET_ULTRA2;
}
else
{
if (wide)
maxoffset = MAX_OFFSET_16BIT;
else
maxoffset = MAX_OFFSET_8BIT;
}
*offset = min(*offset, maxoffset);
}
/*+F*************************************************************************
* Function:
* aic7xxx_set_syncrate
*
* Description:
* Set the actual syncrate down in the card and in our host structs
*-F*************************************************************************/
static void
aic7xxx_set_syncrate(struct aic7xxx_host *p, struct aic7xxx_syncrate *syncrate,
int target, int channel, unsigned int period, unsigned int offset,
unsigned char options, unsigned int type, struct aic_dev_data *aic_dev)
{
unsigned char tindex;
unsigned short target_mask;
unsigned char lun, old_options;
unsigned int old_period, old_offset;
tindex = target | (channel << 3);
target_mask = 0x01 << tindex;
lun = aic_inb(p, SCB_TCL) & 0x07;
if (syncrate == NULL)
{
period = 0;
offset = 0;
}
old_period = aic_dev->cur.period;
old_offset = aic_dev->cur.offset;
old_options = aic_dev->cur.options;
if (type & AHC_TRANS_CUR)
{
unsigned int scsirate;
scsirate = aic_inb(p, TARG_SCSIRATE + tindex);
if (p->features & AHC_ULTRA2)
{
scsirate &= ~SXFR_ULTRA2;
if (syncrate != NULL)
{
switch(options)
{
case MSG_EXT_PPR_OPTION_DT_UNITS:
/*
* mask off the CRC bit in the xfer settings
*/
scsirate |= (syncrate->sxfr_ultra2 & ~AHC_SYNCRATE_CRC);
break;
default:
scsirate |= syncrate->sxfr_ultra2;
break;
}
}
if (type & AHC_TRANS_ACTIVE)
{
aic_outb(p, offset, SCSIOFFSET);
}
aic_outb(p, offset, TARG_OFFSET + tindex);
}
else /* Not an Ultra2 controller */
{
scsirate &= ~(SXFR|SOFS);
p->ultraenb &= ~target_mask;
if (syncrate != NULL)
{
if (syncrate->sxfr & ULTRA_SXFR)
{
p->ultraenb |= target_mask;
}
scsirate |= (syncrate->sxfr & SXFR);
scsirate |= (offset & SOFS);
}
if (type & AHC_TRANS_ACTIVE)
{
unsigned char sxfrctl0;
sxfrctl0 = aic_inb(p, SXFRCTL0);
sxfrctl0 &= ~FAST20;
if (p->ultraenb & target_mask)
sxfrctl0 |= FAST20;
aic_outb(p, sxfrctl0, SXFRCTL0);
}
aic_outb(p, p->ultraenb & 0xff, ULTRA_ENB);
aic_outb(p, (p->ultraenb >> 8) & 0xff, ULTRA_ENB + 1 );
}
if (type & AHC_TRANS_ACTIVE)
{
aic_outb(p, scsirate, SCSIRATE);
}
aic_outb(p, scsirate, TARG_SCSIRATE + tindex);
aic_dev->cur.period = period;
aic_dev->cur.offset = offset;
aic_dev->cur.options = options;
if ( !(type & AHC_TRANS_QUITE) &&
(aic7xxx_verbose & VERBOSE_NEGOTIATION) &&
(aic_dev->flags & DEVICE_PRINT_DTR) )
{
if (offset)
{
int rate_mod = (scsirate & WIDEXFER) ? 1 : 0;
printk(INFO_LEAD "Synchronous at %s Mbyte/sec, "
"offset %d.\n", p->host_no, channel, target, lun,
syncrate->rate[rate_mod], offset);
}
else
{
printk(INFO_LEAD "Using asynchronous transfers.\n",
p->host_no, channel, target, lun);
}
aic_dev->flags &= ~DEVICE_PRINT_DTR;
}
}
if (type & AHC_TRANS_GOAL)
{
aic_dev->goal.period = period;
aic_dev->goal.offset = offset;
aic_dev->goal.options = options;
}
if (type & AHC_TRANS_USER)
{
p->user[tindex].period = period;
p->user[tindex].offset = offset;
p->user[tindex].options = options;
}
}
/*+F*************************************************************************
* Function:
* aic7xxx_set_width
*
* Description:
* Set the actual width down in the card and in our host structs
*-F*************************************************************************/
static void
aic7xxx_set_width(struct aic7xxx_host *p, int target, int channel, int lun,
unsigned int width, unsigned int type, struct aic_dev_data *aic_dev)
{
unsigned char tindex;
unsigned short target_mask;
unsigned int old_width;
tindex = target | (channel << 3);
target_mask = 1 << tindex;
old_width = aic_dev->cur.width;
if (type & AHC_TRANS_CUR)
{
unsigned char scsirate;
scsirate = aic_inb(p, TARG_SCSIRATE + tindex);
scsirate &= ~WIDEXFER;
if (width == MSG_EXT_WDTR_BUS_16_BIT)
scsirate |= WIDEXFER;
aic_outb(p, scsirate, TARG_SCSIRATE + tindex);
if (type & AHC_TRANS_ACTIVE)
aic_outb(p, scsirate, SCSIRATE);
aic_dev->cur.width = width;
if ( !(type & AHC_TRANS_QUITE) &&
(aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
(aic_dev->flags & DEVICE_PRINT_DTR) )
{
printk(INFO_LEAD "Using %s transfers\n", p->host_no, channel, target,
lun, (scsirate & WIDEXFER) ? "Wide(16bit)" : "Narrow(8bit)" );
}
}
if (type & AHC_TRANS_GOAL)
aic_dev->goal.width = width;
if (type & AHC_TRANS_USER)
p->user[tindex].width = width;
if (aic_dev->goal.offset)
{
if (p->features & AHC_ULTRA2)
{
aic_dev->goal.offset = MAX_OFFSET_ULTRA2;
}
else if (width == MSG_EXT_WDTR_BUS_16_BIT)
{
aic_dev->goal.offset = MAX_OFFSET_16BIT;
}
else
{
aic_dev->goal.offset = MAX_OFFSET_8BIT;
}
}
}
/*+F*************************************************************************
* Function:
* scbq_init
*
* Description:
* SCB queue initialization.
*
*-F*************************************************************************/
static void
scbq_init(volatile scb_queue_type *queue)
{
queue->head = NULL;
queue->tail = NULL;
}
/*+F*************************************************************************
* Function:
* scbq_insert_head
*
* Description:
* Add an SCB to the head of the list.
*
*-F*************************************************************************/
static inline void
scbq_insert_head(volatile scb_queue_type *queue, struct aic7xxx_scb *scb)
{
scb->q_next = queue->head;
queue->head = scb;
if (queue->tail == NULL) /* If list was empty, update tail. */
queue->tail = queue->head;
}
/*+F*************************************************************************
* Function:
* scbq_remove_head
*
* Description:
* Remove an SCB from the head of the list.
*
*-F*************************************************************************/
static inline struct aic7xxx_scb *
scbq_remove_head(volatile scb_queue_type *queue)
{
struct aic7xxx_scb * scbp;
scbp = queue->head;
if (queue->head != NULL)
queue->head = queue->head->q_next;
if (queue->head == NULL) /* If list is now empty, update tail. */
queue->tail = NULL;
return(scbp);
}
/*+F*************************************************************************
* Function:
* scbq_remove
*
* Description:
* Removes an SCB from the list.
*
*-F*************************************************************************/
static inline void
scbq_remove(volatile scb_queue_type *queue, struct aic7xxx_scb *scb)
{
if (queue->head == scb)
{
/* At beginning of queue, remove from head. */
scbq_remove_head(queue);
}
else
{
struct aic7xxx_scb *curscb = queue->head;
/*
* Search until the next scb is the one we're looking for, or
* we run out of queue.
*/
while ((curscb != NULL) && (curscb->q_next != scb))
{
curscb = curscb->q_next;
}
if (curscb != NULL)
{
/* Found it. */
curscb->q_next = scb->q_next;
if (scb->q_next == NULL)
{
/* Update the tail when removing the tail. */
queue->tail = curscb;
}
}
}
}
/*+F*************************************************************************
* Function:
* scbq_insert_tail
*
* Description:
* Add an SCB at the tail of the list.
*
*-F*************************************************************************/
static inline void
scbq_insert_tail(volatile scb_queue_type *queue, struct aic7xxx_scb *scb)
{
scb->q_next = NULL;
if (queue->tail != NULL) /* Add the scb at the end of the list. */
queue->tail->q_next = scb;
queue->tail = scb; /* Update the tail. */
if (queue->head == NULL) /* If list was empty, update head. */
queue->head = queue->tail;
}
/*+F*************************************************************************
* Function:
* aic7xxx_match_scb
*
* Description:
* Checks to see if an scb matches the target/channel as specified.
* If target is ALL_TARGETS (-1), then we're looking for any device
* on the specified channel; this happens when a channel is going
* to be reset and all devices on that channel must be aborted.
*-F*************************************************************************/
static int
aic7xxx_match_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb,
int target, int channel, int lun, unsigned char tag)
{
int targ = (scb->hscb->target_channel_lun >> 4) & 0x0F;
int chan = (scb->hscb->target_channel_lun >> 3) & 0x01;
int slun = scb->hscb->target_channel_lun & 0x07;
int match;
match = ((chan == channel) || (channel == ALL_CHANNELS));
if (match != 0)
match = ((targ == target) || (target == ALL_TARGETS));
if (match != 0)
match = ((lun == slun) || (lun == ALL_LUNS));
if (match != 0)
match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL));
return (match);
}
/*+F*************************************************************************
* Function:
* aic7xxx_add_curscb_to_free_list
*
* Description:
* Adds the current scb (in SCBPTR) to the list of free SCBs.
*-F*************************************************************************/
static void
aic7xxx_add_curscb_to_free_list(struct aic7xxx_host *p)
{
/*
* Invalidate the tag so that aic7xxx_find_scb doesn't think
* it's active
*/
aic_outb(p, SCB_LIST_NULL, SCB_TAG);
aic_outb(p, 0, SCB_CONTROL);
aic_outb(p, aic_inb(p, FREE_SCBH), SCB_NEXT);
aic_outb(p, aic_inb(p, SCBPTR), FREE_SCBH);
}
/*+F*************************************************************************
* Function:
* aic7xxx_rem_scb_from_disc_list
*
* Description:
* Removes the current SCB from the disconnected list and adds it
* to the free list.
*-F*************************************************************************/
static unsigned char
aic7xxx_rem_scb_from_disc_list(struct aic7xxx_host *p, unsigned char scbptr,
unsigned char prev)
{
unsigned char next;
aic_outb(p, scbptr, SCBPTR);
next = aic_inb(p, SCB_NEXT);
aic7xxx_add_curscb_to_free_list(p);
if (prev != SCB_LIST_NULL)
{
aic_outb(p, prev, SCBPTR);
aic_outb(p, next, SCB_NEXT);
}
else
{
aic_outb(p, next, DISCONNECTED_SCBH);
}
return next;
}
/*+F*************************************************************************
* Function:
* aic7xxx_busy_target
*
* Description:
* Set the specified target busy.
*-F*************************************************************************/
static inline void
aic7xxx_busy_target(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
{
p->untagged_scbs[scb->hscb->target_channel_lun] = scb->hscb->tag;
}
/*+F*************************************************************************
* Function:
* aic7xxx_index_busy_target
*
* Description:
* Returns the index of the busy target, and optionally sets the
* target inactive.
*-F*************************************************************************/
static inline unsigned char
aic7xxx_index_busy_target(struct aic7xxx_host *p, unsigned char tcl,
int unbusy)
{
unsigned char busy_scbid;
busy_scbid = p->untagged_scbs[tcl];
if (unbusy)
{
p->untagged_scbs[tcl] = SCB_LIST_NULL;
}
return (busy_scbid);
}
/*+F*************************************************************************
* Function:
* aic7xxx_find_scb
*
* Description:
* Look through the SCB array of the card and attempt to find the
* hardware SCB that corresponds to the passed in SCB. Return
* SCB_LIST_NULL if unsuccessful. This routine assumes that the
* card is already paused.
*-F*************************************************************************/
static unsigned char
aic7xxx_find_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
{
unsigned char saved_scbptr;
unsigned char curindex;
saved_scbptr = aic_inb(p, SCBPTR);
curindex = 0;
for (curindex = 0; curindex < p->scb_data->maxhscbs; curindex++)
{
aic_outb(p, curindex, SCBPTR);
if (aic_inb(p, SCB_TAG) == scb->hscb->tag)
{
break;
}
}
aic_outb(p, saved_scbptr, SCBPTR);
if (curindex >= p->scb_data->maxhscbs)
{
curindex = SCB_LIST_NULL;
}
return (curindex);
}
/*+F*************************************************************************
* Function:
* aic7xxx_allocate_scb
*
* Description:
* Get an SCB from the free list or by allocating a new one.
*-F*************************************************************************/
static int
aic7xxx_allocate_scb(struct aic7xxx_host *p)
{
struct aic7xxx_scb *scbp = NULL;
int scb_size = (sizeof (struct hw_scatterlist) * AIC7XXX_MAX_SG) + 12 + 6;
int i;
int step = PAGE_SIZE / 1024;
unsigned long scb_count = 0;
struct hw_scatterlist *hsgp;
struct aic7xxx_scb *scb_ap;
struct aic7xxx_scb_dma *scb_dma;
unsigned char *bufs;
if (p->scb_data->numscbs < p->scb_data->maxscbs)
{
/*
* Calculate the optimal number of SCBs to allocate.
*
* NOTE: This formula works because the sizeof(sg_array) is always
* 1024. Therefore, scb_size * i would always be > PAGE_SIZE *
* (i/step). The (i-1) allows the left hand side of the equation
* to grow into the right hand side to a point of near perfect
* efficiency since scb_size * (i -1) is growing slightly faster
* than the right hand side. If the number of SG array elements
* is changed, this function may not be near so efficient any more.
*
* Since the DMA'able buffers are now allocated in a separate
* chunk this algorithm has been modified to match. The '12'
* and '6' factors in scb_size are for the DMA'able command byte
* and sensebuffers respectively. -DaveM
*/
for ( i=step;; i *= 2 )
{
if ( (scb_size * (i-1)) >= ( (PAGE_SIZE * (i/step)) - 64 ) )
{
i /= 2;
break;
}
}
scb_count = min( (i-1), p->scb_data->maxscbs - p->scb_data->numscbs);
scb_ap = (struct aic7xxx_scb *)kmalloc(sizeof (struct aic7xxx_scb) * scb_count
+ sizeof(struct aic7xxx_scb_dma), GFP_ATOMIC);
if (scb_ap == NULL)
return(0);
scb_dma = (struct aic7xxx_scb_dma *)&scb_ap[scb_count];
hsgp = (struct hw_scatterlist *)
pci_alloc_consistent(p->pdev, scb_size * scb_count,
&scb_dma->dma_address);
if (hsgp == NULL)
{
kfree(scb_ap);
return(0);
}
bufs = (unsigned char *)&hsgp[scb_count * AIC7XXX_MAX_SG];
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if (aic7xxx_verbose > 0xffff)
{
if (p->scb_data->numscbs == 0)
printk(INFO_LEAD "Allocating initial %ld SCB structures.\n",
p->host_no, -1, -1, -1, scb_count);
else
printk(INFO_LEAD "Allocating %ld additional SCB structures.\n",
p->host_no, -1, -1, -1, scb_count);
}
#endif
memset(scb_ap, 0, sizeof (struct aic7xxx_scb) * scb_count);
scb_dma->dma_offset = (unsigned long)scb_dma->dma_address
- (unsigned long)hsgp;
scb_dma->dma_len = scb_size * scb_count;
for (i=0; i < scb_count; i++)
{
scbp = &scb_ap[i];
scbp->hscb = &p->scb_data->hscbs[p->scb_data->numscbs];
scbp->sg_list = &hsgp[i * AIC7XXX_MAX_SG];
scbp->sense_cmd = bufs;
scbp->cmnd = bufs + 6;
bufs += 12 + 6;
scbp->scb_dma = scb_dma;
memset(scbp->hscb, 0, sizeof(struct aic7xxx_hwscb));
scbp->hscb->tag = p->scb_data->numscbs;
/*
* Place in the scb array; never is removed
*/
p->scb_data->scb_array[p->scb_data->numscbs++] = scbp;
scbq_insert_tail(&p->scb_data->free_scbs, scbp);
}
scbp->kmalloc_ptr = scb_ap;
}
return(scb_count);
}
/*+F*************************************************************************
* Function:
* aic7xxx_queue_cmd_complete
*
* Description:
* Due to race conditions present in the SCSI subsystem, it is easier
* to queue completed commands, then call scsi_done() on them when
* we're finished. This function queues the completed commands.
*-F*************************************************************************/
static void
aic7xxx_queue_cmd_complete(struct aic7xxx_host *p, Scsi_Cmnd *cmd)
{
aic7xxx_position(cmd) = SCB_LIST_NULL;
cmd->host_scribble = (char *)p->completeq.head;
p->completeq.head = cmd;
}
/*+F*************************************************************************
* Function:
* aic7xxx_done_cmds_complete
*
* Description:
* Process the completed command queue.
*-F*************************************************************************/
static void
aic7xxx_done_cmds_complete(struct aic7xxx_host *p)
{
Scsi_Cmnd *cmd;
while (p->completeq.head != NULL)
{
cmd = p->completeq.head;
p->completeq.head = (Scsi_Cmnd *)cmd->host_scribble;
cmd->host_scribble = NULL;
cmd->scsi_done(cmd);
}
}
/*+F*************************************************************************
* Function:
* aic7xxx_free_scb
*
* Description:
* Free the scb and insert into the free scb list.
*-F*************************************************************************/
static void
aic7xxx_free_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
{
scb->flags = SCB_FREE;
scb->cmd = NULL;
scb->sg_count = 0;
scb->sg_length = 0;
scb->tag_action = 0;
scb->hscb->control = 0;
scb->hscb->target_status = 0;
scb->hscb->target_channel_lun = SCB_LIST_NULL;
scbq_insert_head(&p->scb_data->free_scbs, scb);
}
/*+F*************************************************************************
* Function:
* aic7xxx_done
*
* Description:
* Calls the higher level scsi done function and frees the scb.
*-F*************************************************************************/
static void
aic7xxx_done(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
{
Scsi_Cmnd *cmd = scb->cmd;
struct aic_dev_data *aic_dev = cmd->device->hostdata;
int tindex = TARGET_INDEX(cmd);
struct aic7xxx_scb *scbp;
unsigned char queue_depth;
if (cmd->use_sg > 1)
{
struct scatterlist *sg;
sg = (struct scatterlist *)cmd->request_buffer;
pci_unmap_sg(p->pdev, sg, cmd->use_sg, cmd->sc_data_direction);
}
else if (cmd->request_bufflen)
pci_unmap_single(p->pdev, aic7xxx_mapping(cmd),
cmd->request_bufflen,
cmd->sc_data_direction);
if (scb->flags & SCB_SENSE)
{
pci_unmap_single(p->pdev,
le32_to_cpu(scb->sg_list[0].address),
sizeof(cmd->sense_buffer),
PCI_DMA_FROMDEVICE);
}
if (scb->flags & SCB_RECOVERY_SCB)
{
p->flags &= ~AHC_ABORT_PENDING;
}
if (scb->flags & (SCB_RESET|SCB_ABORT))
{
cmd->result |= (DID_RESET << 16);
}
if ((scb->flags & SCB_MSGOUT_BITS) != 0)
{
unsigned short mask;
int message_error = FALSE;
mask = 0x01 << tindex;
/*
* Check to see if we get an invalid message or a message error
* after failing to negotiate a wide or sync transfer message.
*/
if ((scb->flags & SCB_SENSE) &&
((scb->cmd->sense_buffer[12] == 0x43) || /* INVALID_MESSAGE */
(scb->cmd->sense_buffer[12] == 0x49))) /* MESSAGE_ERROR */
{
message_error = TRUE;
}
if (scb->flags & SCB_MSGOUT_WDTR)
{
if (message_error)
{
if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
(aic_dev->flags & DEVICE_PRINT_DTR) )
{
printk(INFO_LEAD "Device failed to complete Wide Negotiation "
"processing and\n", p->host_no, CTL_OF_SCB(scb));
printk(INFO_LEAD "returned a sense error code for invalid message, "
"disabling future\n", p->host_no, CTL_OF_SCB(scb));
printk(INFO_LEAD "Wide negotiation to this device.\n", p->host_no,
CTL_OF_SCB(scb));
}
aic_dev->needwdtr = aic_dev->needwdtr_copy = 0;
}
}
if (scb->flags & SCB_MSGOUT_SDTR)
{
if (message_error)
{
if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
(aic_dev->flags & DEVICE_PRINT_DTR) )
{
printk(INFO_LEAD "Device failed to complete Sync Negotiation "
"processing and\n", p->host_no, CTL_OF_SCB(scb));
printk(INFO_LEAD "returned a sense error code for invalid message, "
"disabling future\n", p->host_no, CTL_OF_SCB(scb));
printk(INFO_LEAD "Sync negotiation to this device.\n", p->host_no,
CTL_OF_SCB(scb));
aic_dev->flags &= ~DEVICE_PRINT_DTR;
}
aic_dev->needsdtr = aic_dev->needsdtr_copy = 0;
}
}
if (scb->flags & SCB_MSGOUT_PPR)
{
if(message_error)
{
if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
(aic_dev->flags & DEVICE_PRINT_DTR) )
{
printk(INFO_LEAD "Device failed to complete Parallel Protocol "
"Request processing and\n", p->host_no, CTL_OF_SCB(scb));
printk(INFO_LEAD "returned a sense error code for invalid message, "
"disabling future\n", p->host_no, CTL_OF_SCB(scb));
printk(INFO_LEAD "Parallel Protocol Request negotiation to this "
"device.\n", p->host_no, CTL_OF_SCB(scb));
}
/*
* Disable PPR negotiation and revert back to WDTR and SDTR setup
*/
aic_dev->needppr = aic_dev->needppr_copy = 0;
aic_dev->needsdtr = aic_dev->needsdtr_copy = 1;
aic_dev->needwdtr = aic_dev->needwdtr_copy = 1;
}
}
}
queue_depth = aic_dev->temp_q_depth;
if (queue_depth >= aic_dev->active_cmds)
{
scbp = scbq_remove_head(&aic_dev->delayed_scbs);
if (scbp)
{
if (queue_depth == 1)
{
/*
* Give extra preference to untagged devices, such as CD-R devices
* This makes it more likely that a drive *won't* stuff up while
* waiting on data at a critical time, such as CD-R writing and
* audio CD ripping operations. Should also benefit tape drives.
*/
scbq_insert_head(&p->waiting_scbs, scbp);
}
else
{
scbq_insert_tail(&p->waiting_scbs, scbp);
}
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if (aic7xxx_verbose > 0xffff)
printk(INFO_LEAD "Moving SCB from delayed to waiting queue.\n",
p->host_no, CTL_OF_SCB(scbp));
#endif
if (queue_depth > aic_dev->active_cmds)
{
scbp = scbq_remove_head(&aic_dev->delayed_scbs);
if (scbp)
scbq_insert_tail(&p->waiting_scbs, scbp);
}
}
}
if (!(scb->tag_action))
{
aic7xxx_index_busy_target(p, scb->hscb->target_channel_lun,
/* unbusy */ TRUE);
if (cmd->device->simple_tags)
{
aic_dev->temp_q_depth = aic_dev->max_q_depth;
}
}
if(scb->flags & SCB_DTR_SCB)
{
aic_dev->dtr_pending = 0;
}
aic_dev->active_cmds--;
p->activescbs--;
if ((scb->sg_length >= 512) && (((cmd->result >> 16) & 0xf) == DID_OK))
{
long *ptr;
int x, i;
if (rq_data_dir(cmd->request) == WRITE)
{
aic_dev->w_total++;
ptr = aic_dev->w_bins;
}
else
{
aic_dev->r_total++;
ptr = aic_dev->r_bins;
}
if(cmd->device->simple_tags && cmd->request->flags & REQ_HARDBARRIER)
{
aic_dev->barrier_total++;
if(scb->tag_action == MSG_ORDERED_Q_TAG)
aic_dev->ordered_total++;
}
x = scb->sg_length;
x >>= 10;
for(i=0; i<6; i++)
{
x >>= 2;
if(!x) {
ptr[i]++;
break;
}
}
if(i == 6 && x)
ptr[5]++;
}
aic7xxx_free_scb(p, scb);
aic7xxx_queue_cmd_complete(p, cmd);
}
/*+F*************************************************************************
* Function:
* aic7xxx_run_done_queue
*
* Description:
* Calls the aic7xxx_done() for the Scsi_Cmnd of each scb in the
* aborted list, and adds each scb to the free list. If complete
* is TRUE, we also process the commands complete list.
*-F*************************************************************************/
static void
aic7xxx_run_done_queue(struct aic7xxx_host *p, /*complete*/ int complete)
{
struct aic7xxx_scb *scb;
int i, found = 0;
for (i = 0; i < p->scb_data->numscbs; i++)
{
scb = p->scb_data->scb_array[i];
if (scb->flags & SCB_QUEUED_FOR_DONE)
{
if (scb->flags & SCB_QUEUE_FULL)
{
scb->cmd->result = QUEUE_FULL << 1;
}
else
{
if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
printk(INFO_LEAD "Aborting scb %d\n",
p->host_no, CTL_OF_SCB(scb), scb->hscb->tag);
/*
* Clear any residual information since the normal aic7xxx_done() path
* doesn't touch the residuals.
*/
scb->hscb->residual_SG_segment_count = 0;
scb->hscb->residual_data_count[0] = 0;
scb->hscb->residual_data_count[1] = 0;
scb->hscb->residual_data_count[2] = 0;
}
found++;
aic7xxx_done(p, scb);
}
}
if (aic7xxx_verbose & (VERBOSE_ABORT_RETURN | VERBOSE_RESET_RETURN))
{
printk(INFO_LEAD "%d commands found and queued for "
"completion.\n", p->host_no, -1, -1, -1, found);
}
if (complete)
{
aic7xxx_done_cmds_complete(p);
}
}
/*+F*************************************************************************
* Function:
* aic7xxx_abort_waiting_scb
*
* Description:
* Manipulate the waiting for selection list and return the
* scb that follows the one that we remove.
*-F*************************************************************************/
static unsigned char
aic7xxx_abort_waiting_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb,
unsigned char scbpos, unsigned char prev)
{
unsigned char curscb, next;
/*
* Select the SCB we want to abort and pull the next pointer out of it.
*/
curscb = aic_inb(p, SCBPTR);
aic_outb(p, scbpos, SCBPTR);
next = aic_inb(p, SCB_NEXT);
aic7xxx_add_curscb_to_free_list(p);
/*
* Update the waiting list
*/
if (prev == SCB_LIST_NULL)
{
/*
* First in the list
*/
aic_outb(p, next, WAITING_SCBH);
}
else
{
/*
* Select the scb that pointed to us and update its next pointer.
*/
aic_outb(p, prev, SCBPTR);
aic_outb(p, next, SCB_NEXT);
}
/*
* Point us back at the original scb position and inform the SCSI
* system that the command has been aborted.
*/
aic_outb(p, curscb, SCBPTR);
return (next);
}
/*+F*************************************************************************
* Function:
* aic7xxx_search_qinfifo
*
* Description:
* Search the queue-in FIFO for matching SCBs and conditionally
* requeue. Returns the number of matching SCBs.
*-F*************************************************************************/
static int
aic7xxx_search_qinfifo(struct aic7xxx_host *p, int target, int channel,
int lun, unsigned char tag, int flags, int requeue,
volatile scb_queue_type *queue)
{
int found;
unsigned char qinpos, qintail;
struct aic7xxx_scb *scbp;
found = 0;
qinpos = aic_inb(p, QINPOS);
qintail = p->qinfifonext;
p->qinfifonext = qinpos;
while (qinpos != qintail)
{
scbp = p->scb_data->scb_array[p->qinfifo[qinpos++]];
if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag))
{
/*
* We found an scb that needs to be removed.
*/
if (requeue && (queue != NULL))
{
if (scbp->flags & SCB_WAITINGQ)
{
scbq_remove(queue, scbp);
scbq_remove(&p->waiting_scbs, scbp);
scbq_remove(&AIC_DEV(scbp->cmd)->delayed_scbs, scbp);
AIC_DEV(scbp->cmd)->active_cmds++;
p->activescbs++;
}
scbq_insert_tail(queue, scbp);
AIC_DEV(scbp->cmd)->active_cmds--;
p->activescbs--;
scbp->flags |= SCB_WAITINGQ;
if ( !(scbp->tag_action & TAG_ENB) )
{
aic7xxx_index_busy_target(p, scbp->hscb->target_channel_lun,
TRUE);
}
}
else if (requeue)
{
p->qinfifo[p->qinfifonext++] = scbp->hscb->tag;
}
else
{
/*
* Preserve any SCB_RECOVERY_SCB flags on this scb then set the
* flags we were called with, presumeably so aic7xxx_run_done_queue
* can find this scb
*/
scbp->flags = flags | (scbp->flags & SCB_RECOVERY_SCB);
if (aic7xxx_index_busy_target(p, scbp->hscb->target_channel_lun,
FALSE) == scbp->hscb->tag)
{
aic7xxx_index_busy_target(p, scbp->hscb->target_channel_lun,
TRUE);
}
}
found++;
}
else
{
p->qinfifo[p->qinfifonext++] = scbp->hscb->tag;
}
}
/*
* Now that we've done the work, clear out any left over commands in the
* qinfifo and update the KERNEL_QINPOS down on the card.
*
* NOTE: This routine expect the sequencer to already be paused when
* it is run....make sure it's that way!
*/
qinpos = p->qinfifonext;
while(qinpos != qintail)
{
p->qinfifo[qinpos++] = SCB_LIST_NULL;
}
if (p->features & AHC_QUEUE_REGS)
aic_outb(p, p->qinfifonext, HNSCB_QOFF);
else
aic_outb(p, p->qinfifonext, KERNEL_QINPOS);
return (found);
}
/*+F*************************************************************************
* Function:
* aic7xxx_scb_on_qoutfifo
*
* Description:
* Is the scb that was passed to us currently on the qoutfifo?
*-F*************************************************************************/
static int
aic7xxx_scb_on_qoutfifo(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
{
int i=0;
while(p->qoutfifo[(p->qoutfifonext + i) & 0xff ] != SCB_LIST_NULL)
{
if(p->qoutfifo[(p->qoutfifonext + i) & 0xff ] == scb->hscb->tag)
return TRUE;
else
i++;
}
return FALSE;
}
/*+F*************************************************************************
* Function:
* aic7xxx_reset_device
*
* Description:
* The device at the given target/channel has been reset. Abort
* all active and queued scbs for that target/channel. This function
* need not worry about linked next pointers because if was a MSG_ABORT_TAG
* then we had a tagged command (no linked next), if it was MSG_ABORT or
* MSG_BUS_DEV_RESET then the device won't know about any commands any more
* and no busy commands will exist, and if it was a bus reset, then nothing
* knows about any linked next commands any more. In all cases, we don't
* need to worry about the linked next or busy scb, we just need to clear
* them.
*-F*************************************************************************/
static void
aic7xxx_reset_device(struct aic7xxx_host *p, int target, int channel,
int lun, unsigned char tag)
{
struct aic7xxx_scb *scbp, *prev_scbp;
struct scsi_device *sd;
unsigned char active_scb, tcl, scb_tag;
int i = 0, init_lists = FALSE;
struct aic_dev_data *aic_dev;
/*
* Restore this when we're done
*/
active_scb = aic_inb(p, SCBPTR);
scb_tag = aic_inb(p, SCB_TAG);
if (aic7xxx_verbose & (VERBOSE_RESET_PROCESS | VERBOSE_ABORT_PROCESS))
{
printk(INFO_LEAD "Reset device, hardware_scb %d,\n",
p->host_no, channel, target, lun, active_scb);
printk(INFO_LEAD "Current scb %d, SEQADDR 0x%x, LASTPHASE "
"0x%x\n",
p->host_no, channel, target, lun, scb_tag,
aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8),
aic_inb(p, LASTPHASE));
printk(INFO_LEAD "SG_CACHEPTR 0x%x, SG_COUNT %d, SCSISIGI 0x%x\n",
p->host_no, channel, target, lun,
(p->features & AHC_ULTRA2) ? aic_inb(p, SG_CACHEPTR) : 0,
aic_inb(p, SG_COUNT), aic_inb(p, SCSISIGI));
printk(INFO_LEAD "SSTAT0 0x%x, SSTAT1 0x%x, SSTAT2 0x%x\n",
p->host_no, channel, target, lun, aic_inb(p, SSTAT0),
aic_inb(p, SSTAT1), aic_inb(p, SSTAT2));
}
/*
* Deal with the busy target and linked next issues.
*/
list_for_each_entry(aic_dev, &p->aic_devs, list)
{
if (aic7xxx_verbose & (VERBOSE_RESET_PROCESS | VERBOSE_ABORT_PROCESS))
printk(INFO_LEAD "processing aic_dev %p\n", p->host_no, channel, target,
lun, aic_dev);
sd = aic_dev->SDptr;
if((target != ALL_TARGETS && target != sd->id) ||
(channel != ALL_CHANNELS && channel != sd->channel))
continue;
if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
printk(INFO_LEAD "Cleaning up status information "
"and delayed_scbs.\n", p->host_no, sd->channel, sd->id, sd->lun);
aic_dev->flags &= ~BUS_DEVICE_RESET_PENDING;
if ( tag == SCB_LIST_NULL )
{
aic_dev->dtr_pending = 0;
aic_dev->needppr = aic_dev->needppr_copy;
aic_dev->needsdtr = aic_dev->needsdtr_copy;
aic_dev->needwdtr = aic_dev->needwdtr_copy;
aic_dev->flags = DEVICE_PRINT_DTR;
aic_dev->temp_q_depth = aic_dev->max_q_depth;
}
tcl = (sd->id << 4) | (sd->channel << 3) | sd->lun;
if ( (aic7xxx_index_busy_target(p, tcl, FALSE) == tag) ||
(tag == SCB_LIST_NULL)