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aic79xx_osm.c
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aic79xx_osm.c
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/*
* Adaptec AIC79xx device driver for Linux.
*
* $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
*
* --------------------------------------------------------------------------
* Copyright (c) 1994-2000 Justin T. Gibbs.
* Copyright (c) 1997-1999 Doug Ledford
* Copyright (c) 2000-2003 Adaptec Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include "aic79xx_osm.h"
#include "aic79xx_inline.h"
#include <scsi/scsicam.h>
static struct scsi_transport_template *ahd_linux_transport_template = NULL;
#include <linux/init.h> /* __setup */
#include <linux/mm.h> /* For fetching system memory size */
#include <linux/blkdev.h> /* For block_size() */
#include <linux/delay.h> /* For ssleep/msleep */
#include <linux/device.h>
#include <linux/slab.h>
/*
* Bucket size for counting good commands in between bad ones.
*/
#define AHD_LINUX_ERR_THRESH 1000
/*
* Set this to the delay in seconds after SCSI bus reset.
* Note, we honor this only for the initial bus reset.
* The scsi error recovery code performs its own bus settle
* delay handling for error recovery actions.
*/
#ifdef CONFIG_AIC79XX_RESET_DELAY_MS
#define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
#else
#define AIC79XX_RESET_DELAY 5000
#endif
/*
* To change the default number of tagged transactions allowed per-device,
* add a line to the lilo.conf file like:
* append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
* which will result in the first four devices on the first two
* controllers being set to a tagged queue depth of 32.
*
* The tag_commands is an array of 16 to allow for wide and twin adapters.
* Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
* for channel 1.
*/
typedef struct {
uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */
} adapter_tag_info_t;
/*
* Modify this as you see fit for your system.
*
* 0 tagged queuing disabled
* 1 <= n <= 253 n == max tags ever dispatched.
*
* The driver will throttle the number of commands dispatched to a
* device if it returns queue full. For devices with a fixed maximum
* queue depth, the driver will eventually determine this depth and
* lock it in (a console message is printed to indicate that a lock
* has occurred). On some devices, queue full is returned for a temporary
* resource shortage. These devices will return queue full at varying
* depths. The driver will throttle back when the queue fulls occur and
* attempt to slowly increase the depth over time as the device recovers
* from the resource shortage.
*
* In this example, the first line will disable tagged queueing for all
* the devices on the first probed aic79xx adapter.
*
* The second line enables tagged queueing with 4 commands/LUN for IDs
* (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
* driver to attempt to use up to 64 tags for ID 1.
*
* The third line is the same as the first line.
*
* The fourth line disables tagged queueing for devices 0 and 3. It
* enables tagged queueing for the other IDs, with 16 commands/LUN
* for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
* IDs 2, 5-7, and 9-15.
*/
/*
* NOTE: The below structure is for reference only, the actual structure
* to modify in order to change things is just below this comment block.
adapter_tag_info_t aic79xx_tag_info[] =
{
{{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
{{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
{{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
{{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
};
*/
#ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
#define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
#else
#define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
#endif
#define AIC79XX_CONFIGED_TAG_COMMANDS { \
AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \
}
/*
* By default, use the number of commands specified by
* the users kernel configuration.
*/
static adapter_tag_info_t aic79xx_tag_info[] =
{
{AIC79XX_CONFIGED_TAG_COMMANDS},
{AIC79XX_CONFIGED_TAG_COMMANDS},
{AIC79XX_CONFIGED_TAG_COMMANDS},
{AIC79XX_CONFIGED_TAG_COMMANDS},
{AIC79XX_CONFIGED_TAG_COMMANDS},
{AIC79XX_CONFIGED_TAG_COMMANDS},
{AIC79XX_CONFIGED_TAG_COMMANDS},
{AIC79XX_CONFIGED_TAG_COMMANDS},
{AIC79XX_CONFIGED_TAG_COMMANDS},
{AIC79XX_CONFIGED_TAG_COMMANDS},
{AIC79XX_CONFIGED_TAG_COMMANDS},
{AIC79XX_CONFIGED_TAG_COMMANDS},
{AIC79XX_CONFIGED_TAG_COMMANDS},
{AIC79XX_CONFIGED_TAG_COMMANDS},
{AIC79XX_CONFIGED_TAG_COMMANDS},
{AIC79XX_CONFIGED_TAG_COMMANDS}
};
/*
* The I/O cell on the chip is very configurable in respect to its analog
* characteristics. Set the defaults here; they can be overriden with
* the proper insmod parameters.
*/
struct ahd_linux_iocell_opts
{
uint8_t precomp;
uint8_t slewrate;
uint8_t amplitude;
};
#define AIC79XX_DEFAULT_PRECOMP 0xFF
#define AIC79XX_DEFAULT_SLEWRATE 0xFF
#define AIC79XX_DEFAULT_AMPLITUDE 0xFF
#define AIC79XX_DEFAULT_IOOPTS \
{ \
AIC79XX_DEFAULT_PRECOMP, \
AIC79XX_DEFAULT_SLEWRATE, \
AIC79XX_DEFAULT_AMPLITUDE \
}
#define AIC79XX_PRECOMP_INDEX 0
#define AIC79XX_SLEWRATE_INDEX 1
#define AIC79XX_AMPLITUDE_INDEX 2
static const struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
{
AIC79XX_DEFAULT_IOOPTS,
AIC79XX_DEFAULT_IOOPTS,
AIC79XX_DEFAULT_IOOPTS,
AIC79XX_DEFAULT_IOOPTS,
AIC79XX_DEFAULT_IOOPTS,
AIC79XX_DEFAULT_IOOPTS,
AIC79XX_DEFAULT_IOOPTS,
AIC79XX_DEFAULT_IOOPTS,
AIC79XX_DEFAULT_IOOPTS,
AIC79XX_DEFAULT_IOOPTS,
AIC79XX_DEFAULT_IOOPTS,
AIC79XX_DEFAULT_IOOPTS,
AIC79XX_DEFAULT_IOOPTS,
AIC79XX_DEFAULT_IOOPTS,
AIC79XX_DEFAULT_IOOPTS,
AIC79XX_DEFAULT_IOOPTS
};
/*
* There should be a specific return value for this in scsi.h, but
* it seems that most drivers ignore it.
*/
#define DID_UNDERFLOW DID_ERROR
void
ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
{
printk("(scsi%d:%c:%d:%d): ",
ahd->platform_data->host->host_no,
scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
scb != NULL ? SCB_GET_LUN(scb) : -1);
}
/*
* XXX - these options apply unilaterally to _all_ adapters
* cards in the system. This should be fixed. Exceptions to this
* rule are noted in the comments.
*/
/*
* Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
* has no effect on any later resets that might occur due to things like
* SCSI bus timeouts.
*/
static uint32_t aic79xx_no_reset;
/*
* Should we force EXTENDED translation on a controller.
* 0 == Use whatever is in the SEEPROM or default to off
* 1 == Use whatever is in the SEEPROM or default to on
*/
static uint32_t aic79xx_extended;
/*
* 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
* non-0 = Enable PCI parity check
*
* 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 uint32_t aic79xx_pci_parity = ~0;
/*
* There are lots of broken chipsets in the world. Some of them will
* violate the PCI spec when we issue byte sized memory writes to our
* controller. I/O mapped register access, if allowed by the given
* platform, will work in almost all cases.
*/
uint32_t aic79xx_allow_memio = ~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 256ms because some older devices need a longer time
* to respond to initial selection.
*/
static uint32_t aic79xx_seltime;
/*
* Certain devices do not perform any aging on commands. Should the
* device be saturated by commands in one portion of the disk, it is
* possible for transactions on far away sectors to never be serviced.
* To handle these devices, we can periodically send an ordered tag to
* force all outstanding transactions to be serviced prior to a new
* transaction.
*/
static uint32_t aic79xx_periodic_otag;
/* Some storage boxes are using an LSI chip which has a bug making it
* impossible to use aic79xx Rev B chip in 320 speeds. The following
* storage boxes have been reported to be buggy:
* EonStor 3U 16-Bay: U16U-G3A3
* EonStor 2U 12-Bay: U12U-G3A3
* SentinelRAID: 2500F R5 / R6
* SentinelRAID: 2500F R1
* SentinelRAID: 2500F/1500F
* SentinelRAID: 150F
*
* To get around this LSI bug, you can set your board to 160 mode
* or you can enable the SLOWCRC bit.
*/
uint32_t aic79xx_slowcrc;
/*
* Module information and settable options.
*/
static char *aic79xx = NULL;
MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(AIC79XX_DRIVER_VERSION);
module_param(aic79xx, charp, 0444);
MODULE_PARM_DESC(aic79xx,
"period-delimited options string:\n"
" verbose Enable verbose/diagnostic logging\n"
" allow_memio Allow device registers to be memory mapped\n"
" debug Bitmask of debug values to enable\n"
" no_reset Suppress initial bus resets\n"
" extended Enable extended geometry on all controllers\n"
" periodic_otag Send an ordered tagged transaction\n"
" periodically to prevent tag starvation.\n"
" This may be required by some older disk\n"
" or drives/RAID arrays.\n"
" tag_info:<tag_str> Set per-target tag depth\n"
" global_tag_depth:<int> Global tag depth for all targets on all buses\n"
" slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
" precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
" amplitude:<int> Set the signal amplitude (0-7).\n"
" seltime:<int> Selection Timeout:\n"
" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
" slowcrc Turn on the SLOWCRC bit (Rev B only)\n"
"\n"
" Sample modprobe configuration file:\n"
" # Enable verbose logging\n"
" # Set tag depth on Controller 2/Target 2 to 10 tags\n"
" # Shorten the selection timeout to 128ms\n"
"\n"
" options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
);
static void ahd_linux_handle_scsi_status(struct ahd_softc *,
struct scsi_device *,
struct scb *);
static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
struct scsi_cmnd *cmd);
static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
struct ahd_devinfo *devinfo);
static void ahd_linux_device_queue_depth(struct scsi_device *);
static int ahd_linux_run_command(struct ahd_softc*,
struct ahd_linux_device *,
struct scsi_cmnd *);
static void ahd_linux_setup_tag_info_global(char *p);
static int aic79xx_setup(char *c);
static void ahd_freeze_simq(struct ahd_softc *ahd);
static void ahd_release_simq(struct ahd_softc *ahd);
static int ahd_linux_unit;
/************************** OS Utility Wrappers *******************************/
void ahd_delay(long);
void
ahd_delay(long usec)
{
/*
* udelay on Linux can have problems for
* multi-millisecond waits. Wait at most
* 1024us per call.
*/
while (usec > 0) {
udelay(usec % 1024);
usec -= 1024;
}
}
/***************************** Low Level I/O **********************************/
uint8_t ahd_inb(struct ahd_softc * ahd, long port);
void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
void ahd_outw_atomic(struct ahd_softc * ahd,
long port, uint16_t val);
void ahd_outsb(struct ahd_softc * ahd, long port,
uint8_t *, int count);
void ahd_insb(struct ahd_softc * ahd, long port,
uint8_t *, int count);
uint8_t
ahd_inb(struct ahd_softc * ahd, long port)
{
uint8_t x;
if (ahd->tags[0] == BUS_SPACE_MEMIO) {
x = readb(ahd->bshs[0].maddr + port);
} else {
x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
}
mb();
return (x);
}
#if 0 /* unused */
static uint16_t
ahd_inw_atomic(struct ahd_softc * ahd, long port)
{
uint8_t x;
if (ahd->tags[0] == BUS_SPACE_MEMIO) {
x = readw(ahd->bshs[0].maddr + port);
} else {
x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
}
mb();
return (x);
}
#endif
void
ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
{
if (ahd->tags[0] == BUS_SPACE_MEMIO) {
writeb(val, ahd->bshs[0].maddr + port);
} else {
outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
}
mb();
}
void
ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
{
if (ahd->tags[0] == BUS_SPACE_MEMIO) {
writew(val, ahd->bshs[0].maddr + port);
} else {
outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
}
mb();
}
void
ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
{
int i;
/*
* There is probably a more efficient way to do this on Linux
* but we don't use this for anything speed critical and this
* should work.
*/
for (i = 0; i < count; i++)
ahd_outb(ahd, port, *array++);
}
void
ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
{
int i;
/*
* There is probably a more efficient way to do this on Linux
* but we don't use this for anything speed critical and this
* should work.
*/
for (i = 0; i < count; i++)
*array++ = ahd_inb(ahd, port);
}
/******************************* PCI Routines *********************************/
uint32_t
ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
{
switch (width) {
case 1:
{
uint8_t retval;
pci_read_config_byte(pci, reg, &retval);
return (retval);
}
case 2:
{
uint16_t retval;
pci_read_config_word(pci, reg, &retval);
return (retval);
}
case 4:
{
uint32_t retval;
pci_read_config_dword(pci, reg, &retval);
return (retval);
}
default:
panic("ahd_pci_read_config: Read size too big");
/* NOTREACHED */
return (0);
}
}
void
ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
{
switch (width) {
case 1:
pci_write_config_byte(pci, reg, value);
break;
case 2:
pci_write_config_word(pci, reg, value);
break;
case 4:
pci_write_config_dword(pci, reg, value);
break;
default:
panic("ahd_pci_write_config: Write size too big");
/* NOTREACHED */
}
}
/****************************** Inlines ***************************************/
static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
static void
ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
{
struct scsi_cmnd *cmd;
cmd = scb->io_ctx;
ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
scsi_dma_unmap(cmd);
}
/******************************** Macros **************************************/
#define BUILD_SCSIID(ahd, cmd) \
(((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
/*
* Return a string describing the driver.
*/
static const char *
ahd_linux_info(struct Scsi_Host *host)
{
static char buffer[512];
char ahd_info[256];
char *bp;
struct ahd_softc *ahd;
bp = &buffer[0];
ahd = *(struct ahd_softc **)host->hostdata;
memset(bp, 0, sizeof(buffer));
strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n"
" <");
strcat(bp, ahd->description);
strcat(bp, ">\n"
" ");
ahd_controller_info(ahd, ahd_info);
strcat(bp, ahd_info);
return (bp);
}
/*
* Queue an SCB to the controller.
*/
static int
ahd_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
{
struct ahd_softc *ahd;
struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
int rtn = SCSI_MLQUEUE_HOST_BUSY;
ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
cmd->scsi_done = scsi_done;
cmd->result = CAM_REQ_INPROG << 16;
rtn = ahd_linux_run_command(ahd, dev, cmd);
return rtn;
}
static DEF_SCSI_QCMD(ahd_linux_queue)
static struct scsi_target **
ahd_linux_target_in_softc(struct scsi_target *starget)
{
struct ahd_softc *ahd =
*((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
unsigned int target_offset;
target_offset = starget->id;
if (starget->channel != 0)
target_offset += 8;
return &ahd->platform_data->starget[target_offset];
}
static int
ahd_linux_target_alloc(struct scsi_target *starget)
{
struct ahd_softc *ahd =
*((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
struct seeprom_config *sc = ahd->seep_config;
unsigned long flags;
struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
struct ahd_devinfo devinfo;
struct ahd_initiator_tinfo *tinfo;
struct ahd_tmode_tstate *tstate;
char channel = starget->channel + 'A';
ahd_lock(ahd, &flags);
BUG_ON(*ahd_targp != NULL);
*ahd_targp = starget;
if (sc) {
int flags = sc->device_flags[starget->id];
tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
starget->id, &tstate);
if ((flags & CFPACKETIZED) == 0) {
/* don't negotiate packetized (IU) transfers */
spi_max_iu(starget) = 0;
} else {
if ((ahd->features & AHD_RTI) == 0)
spi_rti(starget) = 0;
}
if ((flags & CFQAS) == 0)
spi_max_qas(starget) = 0;
/* Transinfo values have been set to BIOS settings */
spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
spi_min_period(starget) = tinfo->user.period;
spi_max_offset(starget) = tinfo->user.offset;
}
tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
starget->id, &tstate);
ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
CAM_LUN_WILDCARD, channel,
ROLE_INITIATOR);
ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
AHD_TRANS_GOAL, /*paused*/FALSE);
ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
AHD_TRANS_GOAL, /*paused*/FALSE);
ahd_unlock(ahd, &flags);
return 0;
}
static void
ahd_linux_target_destroy(struct scsi_target *starget)
{
struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
*ahd_targp = NULL;
}
static int
ahd_linux_slave_alloc(struct scsi_device *sdev)
{
struct ahd_softc *ahd =
*((struct ahd_softc **)sdev->host->hostdata);
struct ahd_linux_device *dev;
if (bootverbose)
printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
dev = scsi_transport_device_data(sdev);
memset(dev, 0, sizeof(*dev));
/*
* We start out life using untagged
* transactions of which we allow one.
*/
dev->openings = 1;
/*
* Set maxtags to 0. This will be changed if we
* later determine that we are dealing with
* a tagged queuing capable device.
*/
dev->maxtags = 0;
return (0);
}
static int
ahd_linux_slave_configure(struct scsi_device *sdev)
{
struct ahd_softc *ahd;
ahd = *((struct ahd_softc **)sdev->host->hostdata);
if (bootverbose)
sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
ahd_linux_device_queue_depth(sdev);
/* Initial Domain Validation */
if (!spi_initial_dv(sdev->sdev_target))
spi_dv_device(sdev);
return 0;
}
#if defined(__i386__)
/*
* Return the disk geometry for the given SCSI device.
*/
static int
ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
sector_t capacity, int geom[])
{
uint8_t *bh;
int heads;
int sectors;
int cylinders;
int ret;
int extended;
struct ahd_softc *ahd;
ahd = *((struct ahd_softc **)sdev->host->hostdata);
bh = scsi_bios_ptable(bdev);
if (bh) {
ret = scsi_partsize(bh, capacity,
&geom[2], &geom[0], &geom[1]);
kfree(bh);
if (ret != -1)
return (ret);
}
heads = 64;
sectors = 32;
cylinders = aic_sector_div(capacity, heads, sectors);
if (aic79xx_extended != 0)
extended = 1;
else
extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
if (extended && cylinders >= 1024) {
heads = 255;
sectors = 63;
cylinders = aic_sector_div(capacity, heads, sectors);
}
geom[0] = heads;
geom[1] = sectors;
geom[2] = cylinders;
return (0);
}
#endif
/*
* Abort the current SCSI command(s).
*/
static int
ahd_linux_abort(struct scsi_cmnd *cmd)
{
int error;
error = ahd_linux_queue_abort_cmd(cmd);
return error;
}
/*
* Attempt to send a target reset message to the device that timed out.
*/
static int
ahd_linux_dev_reset(struct scsi_cmnd *cmd)
{
struct ahd_softc *ahd;
struct ahd_linux_device *dev;
struct scb *reset_scb;
u_int cdb_byte;
int retval = SUCCESS;
int paused;
int wait;
struct ahd_initiator_tinfo *tinfo;
struct ahd_tmode_tstate *tstate;
unsigned long flags;
DECLARE_COMPLETION_ONSTACK(done);
reset_scb = NULL;
paused = FALSE;
wait = FALSE;
ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
scmd_printk(KERN_INFO, cmd,
"Attempting to queue a TARGET RESET message:");
printk("CDB:");
for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
printk(" 0x%x", cmd->cmnd[cdb_byte]);
printk("\n");
/*
* Determine if we currently own this command.
*/
dev = scsi_transport_device_data(cmd->device);
if (dev == NULL) {
/*
* No target device for this command exists,
* so we must not still own the command.
*/
scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
return SUCCESS;
}
/*
* Generate us a new SCB
*/
reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
if (!reset_scb) {
scmd_printk(KERN_INFO, cmd, "No SCB available\n");
return FAILED;
}
tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
cmd->device->id, &tstate);
reset_scb->io_ctx = cmd;
reset_scb->platform_data->dev = dev;
reset_scb->sg_count = 0;
ahd_set_residual(reset_scb, 0);
ahd_set_sense_residual(reset_scb, 0);
reset_scb->platform_data->xfer_len = 0;
reset_scb->hscb->control = 0;
reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
reset_scb->hscb->lun = cmd->device->lun;
reset_scb->hscb->cdb_len = 0;
reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
reset_scb->flags |= SCB_PACKETIZED;
} else {
reset_scb->hscb->control |= MK_MESSAGE;
}
dev->openings--;
dev->active++;
dev->commands_issued++;
ahd_lock(ahd, &flags);
LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
ahd_queue_scb(ahd, reset_scb);
ahd->platform_data->eh_done = &done;
ahd_unlock(ahd, &flags);
printk("%s: Device reset code sleeping\n", ahd_name(ahd));
if (!wait_for_completion_timeout(&done, 5 * HZ)) {
ahd_lock(ahd, &flags);
ahd->platform_data->eh_done = NULL;
ahd_unlock(ahd, &flags);
printk("%s: Device reset timer expired (active %d)\n",
ahd_name(ahd), dev->active);
retval = FAILED;
}
printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
return (retval);
}
/*
* Reset the SCSI bus.
*/
static int
ahd_linux_bus_reset(struct scsi_cmnd *cmd)
{
struct ahd_softc *ahd;
int found;
unsigned long flags;
ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
#ifdef AHD_DEBUG
if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
printk("%s: Bus reset called for cmd %p\n",
ahd_name(ahd), cmd);
#endif
ahd_lock(ahd, &flags);
found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
/*initiate reset*/TRUE);
ahd_unlock(ahd, &flags);
if (bootverbose)
printk("%s: SCSI bus reset delivered. "
"%d SCBs aborted.\n", ahd_name(ahd), found);
return (SUCCESS);
}
struct scsi_host_template aic79xx_driver_template = {
.module = THIS_MODULE,
.name = "aic79xx",
.proc_name = "aic79xx",
.proc_info = ahd_linux_proc_info,
.info = ahd_linux_info,
.queuecommand = ahd_linux_queue,
.eh_abort_handler = ahd_linux_abort,
.eh_device_reset_handler = ahd_linux_dev_reset,
.eh_bus_reset_handler = ahd_linux_bus_reset,
#if defined(__i386__)
.bios_param = ahd_linux_biosparam,
#endif
.can_queue = AHD_MAX_QUEUE,
.this_id = -1,
.max_sectors = 8192,
.cmd_per_lun = 2,
.use_clustering = ENABLE_CLUSTERING,
.slave_alloc = ahd_linux_slave_alloc,
.slave_configure = ahd_linux_slave_configure,
.target_alloc = ahd_linux_target_alloc,
.target_destroy = ahd_linux_target_destroy,
};
/******************************** Bus DMA *************************************/
int
ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
bus_size_t alignment, bus_size_t boundary,
dma_addr_t lowaddr, dma_addr_t highaddr,
bus_dma_filter_t *filter, void *filterarg,
bus_size_t maxsize, int nsegments,
bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
{
bus_dma_tag_t dmat;
dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
if (dmat == NULL)
return (ENOMEM);
/*
* Linux is very simplistic about DMA memory. For now don't
* maintain all specification information. Once Linux supplies
* better facilities for doing these operations, or the
* needs of this particular driver change, we might need to do
* more here.
*/
dmat->alignment = alignment;
dmat->boundary = boundary;
dmat->maxsize = maxsize;
*ret_tag = dmat;
return (0);
}
void
ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
{
kfree(dmat);
}
int
ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
int flags, bus_dmamap_t *mapp)
{
*vaddr = pci_alloc_consistent(ahd->dev_softc,
dmat->maxsize, mapp);
if (*vaddr == NULL)
return (ENOMEM);
return(0);
}
void
ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
void* vaddr, bus_dmamap_t map)
{
pci_free_consistent(ahd->dev_softc, dmat->maxsize,
vaddr, map);
}
int
ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
void *cb_arg, int flags)
{
/*
* Assume for now that this will only be used during
* initialization and not for per-transaction buffer mapping.
*/
bus_dma_segment_t stack_sg;
stack_sg.ds_addr = map;
stack_sg.ds_len = dmat->maxsize;
cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
return (0);
}
void