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fad01ef88d
linux_dsm_epyc7002/drivers/scsi/aic7xxx/aic7xxx_osm.c
James Bottomley fad01ef88d [SCSI] correct aic7xxx period setting routines 
This is similar to the previous sym2 problem.  For Domain Validation to
work we can't allow any period setting to turn wide on if it was
previously off.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-05-20 15:54:33 -05:00

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/*
* Adaptec AIC7xxx device driver for Linux.
*
* $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $
*
* Copyright (c) 1994 John Aycock
* The University of Calgary Department of Computer Science.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
* driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
* config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
* the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
* the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
* (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
* the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
* ANSI SCSI-2 specification (draft 10c), ...
*
* --------------------------------------------------------------------------
*
* Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
*
* Substantially modified to include support for wide and twin bus
* adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
* SCB paging, and other rework of the code.
*
* --------------------------------------------------------------------------
* Copyright (c) 1994-2000 Justin T. Gibbs.
* Copyright (c) 2000-2001 Adaptec Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
*---------------------------------------------------------------------------
*
* Thanks also go to (in alphabetical order) the following:
*
* Rory Bolt - Sequencer bug fixes
* Jay Estabrook - Initial DEC Alpha support
* Doug Ledford - Much needed abort/reset bug fixes
* Kai Makisara - DMAing of SCBs
*
* A Boot time option was also added for not resetting the scsi bus.
*
* Form: aic7xxx=extended
* aic7xxx=no_reset
* aic7xxx=verbose
*
* Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
*
* Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp
*/
/*
* Further driver modifications made by Doug Ledford <dledford@redhat.com>
*
* Copyright (c) 1997-1999 Doug Ledford
*
* These changes are released under the same licensing terms as the FreeBSD
* driver written by Justin Gibbs. Please see his Copyright notice above
* for the exact terms and conditions covering my changes as well as the
* warranty statement.
*
* Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
* but are not limited to:
*
* 1: Import of the latest FreeBSD sequencer code for this driver
* 2: Modification of kernel code to 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
*
*/
#include "aic7xxx_osm.h"
#include "aic7xxx_inline.h"
#include <scsi/scsicam.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_spi.h>
static struct scsi_transport_template *ahc_linux_transport_template = NULL;
/*
* Include aiclib.c as part of our
* "module dependencies are hard" work around.
*/
#include "aiclib.c"
#include <linux/init.h> /* __setup */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
#include "sd.h" /* For geometry detection */
#endif
#include <linux/mm.h> /* For fetching system memory size */
#include <linux/blkdev.h> /* For block_size() */
#include <linux/delay.h> /* For ssleep/msleep */
/*
* Lock protecting manipulation of the ahc softc list.
*/
spinlock_t ahc_list_spinlock;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
/* For dynamic sglist size calculation. */
u_int ahc_linux_nseg;
#endif
/*
* Set this to the delay in seconds after SCSI bus reset.
* Note, we honor this only for the initial bus reset.
* The scsi error recovery code performs its own bus settle
* delay handling for error recovery actions.
*/
#ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
#else
#define AIC7XXX_RESET_DELAY 5000
#endif
/*
* Control collection of SCSI transfer statistics for the /proc filesystem.
*
* NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
* NOTE: This does affect performance since it has to maintain statistics.
*/
#ifdef CONFIG_AIC7XXX_PROC_STATS
#define AIC7XXX_PROC_STATS
#endif
/*
* To change the default number of tagged transactions allowed per-device,
* add a line to the lilo.conf file like:
* append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
* which will result in the first four devices on the first two
* controllers being set to a tagged queue depth of 32.
*
* The tag_commands is an array of 16 to allow for wide and twin adapters.
* Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
* for channel 1.
*/
typedef struct {
uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
} adapter_tag_info_t;
/*
* Modify this as you see fit for your system.
*
* 0 tagged queuing disabled
* 1 <= n <= 253 n == max tags ever dispatched.
*
* The driver will throttle the number of commands dispatched to a
* device if it returns queue full. For devices with a fixed maximum
* queue depth, the driver will eventually determine this depth and
* lock it in (a console message is printed to indicate that a lock
* has occurred). On some devices, queue full is returned for a temporary
* resource shortage. These devices will return queue full at varying
* depths. The driver will throttle back when the queue fulls occur and
* attempt to slowly increase the depth over time as the device recovers
* from the resource shortage.
*
* In this example, the first line will disable tagged queueing for all
* the devices on the first probed aic7xxx adapter.
*
* The second line enables tagged queueing with 4 commands/LUN for IDs
* (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
* driver to attempt to use up to 64 tags for ID 1.
*
* The third line is the same as the first line.
*
* The fourth line disables tagged queueing for devices 0 and 3. It
* enables tagged queueing for the other IDs, with 16 commands/LUN
* for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
* IDs 2, 5-7, and 9-15.
*/
/*
* NOTE: The below structure is for reference only, the actual structure
* to modify in order to change things is just below this comment block.
adapter_tag_info_t aic7xxx_tag_info[] =
{
{{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
{{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
{{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
{{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
};
*/
#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
#else
#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
#endif
#define AIC7XXX_CONFIGED_TAG_COMMANDS { \
AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
}
/*
* By default, use the number of commands specified by
* the users kernel configuration.
*/
static adapter_tag_info_t aic7xxx_tag_info[] =
{
{AIC7XXX_CONFIGED_TAG_COMMANDS},
{AIC7XXX_CONFIGED_TAG_COMMANDS},
{AIC7XXX_CONFIGED_TAG_COMMANDS},
{AIC7XXX_CONFIGED_TAG_COMMANDS},
{AIC7XXX_CONFIGED_TAG_COMMANDS},
{AIC7XXX_CONFIGED_TAG_COMMANDS},
{AIC7XXX_CONFIGED_TAG_COMMANDS},
{AIC7XXX_CONFIGED_TAG_COMMANDS},
{AIC7XXX_CONFIGED_TAG_COMMANDS},
{AIC7XXX_CONFIGED_TAG_COMMANDS},
{AIC7XXX_CONFIGED_TAG_COMMANDS},
{AIC7XXX_CONFIGED_TAG_COMMANDS},
{AIC7XXX_CONFIGED_TAG_COMMANDS},
{AIC7XXX_CONFIGED_TAG_COMMANDS},
{AIC7XXX_CONFIGED_TAG_COMMANDS},
{AIC7XXX_CONFIGED_TAG_COMMANDS}
};
/*
* There should be a specific return value for this in scsi.h, but
* it seems that most drivers ignore it.
*/
#define DID_UNDERFLOW DID_ERROR
void
ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
{
printk("(scsi%d:%c:%d:%d): ",
ahc->platform_data->host->host_no,
scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
scb != NULL ? SCB_GET_LUN(scb) : -1);
}
/*
* XXX - these options apply unilaterally to _all_ 274x/284x/294x
* cards in the system. This should be fixed. Exceptions to this
* rule are noted in the comments.
*/
/*
* Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
* has no effect on any later resets that might occur due to things like
* SCSI bus timeouts.
*/
static uint32_t aic7xxx_no_reset;
/*
* Certain PCI motherboards will scan PCI devices from highest to lowest,
* others scan from lowest to highest, and they tend to do all kinds of
* strange things when they come into contact with PCI bridge chips. The
* net result of all this is that the PCI card that is actually used to boot
* the machine is very hard to detect. Most motherboards go from lowest
* PCI slot number to highest, and the first SCSI controller found is the
* one you boot from. The only exceptions to this are when a controller
* has its BIOS disabled. So, we by default sort all of our SCSI controllers
* from lowest PCI slot number to highest PCI slot number. We also force
* all controllers with their BIOS disabled to the end of the list. This
* works on *almost* all computers. Where it doesn't work, we have this
* option. Setting this option to non-0 will reverse the order of the sort
* to highest first, then lowest, but will still leave cards with their BIOS
* disabled at the very end. That should fix everyone up unless there are
* really strange cirumstances.
*/
static uint32_t aic7xxx_reverse_scan;
/*
* Should we force EXTENDED translation on a controller.
* 0 == Use whatever is in the SEEPROM or default to off
* 1 == Use whatever is in the SEEPROM or default to on
*/
static uint32_t aic7xxx_extended;
/*
* 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 where stray PCI transactions with bad parity are
* the norm rather than the exception, the error messages can be overwelming.
* It's included in the driver for completeness.
* 0 = Shut off PCI parity check
* non-0 = reverse polarity pci parity checking
*/
static uint32_t aic7xxx_pci_parity = ~0;
/*
* Certain newer motherboards have put new PCI based devices into the
* IO spaces that used to typically be occupied by VLB or EISA cards.
* This overlap can cause these newer motherboards to lock up when scanned
* for older EISA and VLB devices. Setting this option to non-0 will
* cause the driver to skip scanning for any VLB or EISA controllers and
* only support the PCI controllers. NOTE: this means that if the kernel
* os compiled with PCI support disabled, then setting this to non-0
* would result in never finding any devices :)
*/
#ifndef CONFIG_AIC7XXX_PROBE_EISA_VL
uint32_t aic7xxx_probe_eisa_vl;
#else
uint32_t aic7xxx_probe_eisa_vl = ~0;
#endif
/*
* 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 aic7xxx_allow_memio = ~0;
/*
* aic7xxx_detect() has been run, so register all device arrivals
* immediately with the system rather than deferring to the sorted
* attachment performed by aic7xxx_detect().
*/
int aic7xxx_detect_complete;
/*
* So that we can set how long each device is given as a selection timeout.
* The table of values goes like this:
* 0 - 256ms
* 1 - 128ms
* 2 - 64ms
* 3 - 32ms
* We default to 256ms because some older devices need a longer time
* to respond to initial selection.
*/
static uint32_t aic7xxx_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.
*/
uint32_t aic7xxx_periodic_otag;
/*
* Module information and settable options.
*/
static char *aic7xxx = NULL;
MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
module_param(aic7xxx, charp, 0444);
MODULE_PARM_DESC(aic7xxx,
"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_probe Toggle EISA/VLB controller probing\n"
" probe_eisa_vl Toggle EISA/VLB controller probing\n"
" no_reset Supress 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"
" drives or RAID arrays.\n"
" reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
" tag_info:<tag_str> Set per-target tag depth\n"
" global_tag_depth:<int> Global tag depth for every target\n"
" on every bus\n"
" seltime:<int> Selection Timeout\n"
" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
"\n"
" Sample /etc/modprobe.conf line:\n"
" Toggle EISA/VLB probing\n"
" Set tag depth on Controller 1/Target 1 to 10 tags\n"
" Shorten the selection timeout to 128ms\n"
"\n"
" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
);
static void ahc_linux_handle_scsi_status(struct ahc_softc *,
struct ahc_linux_device *,
struct scb *);
static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
Scsi_Cmnd *cmd);
static void ahc_linux_sem_timeout(u_long arg);
static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
static void ahc_linux_release_simq(u_long arg);
static void ahc_linux_dev_timed_unfreeze(u_long arg);
static int ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag);
static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
static void ahc_linux_size_nseg(void);
static void ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc);
static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
struct ahc_devinfo *devinfo);
static void ahc_linux_device_queue_depth(struct ahc_softc *ahc,
struct ahc_linux_device *dev);
static struct ahc_linux_target* ahc_linux_alloc_target(struct ahc_softc*,
u_int, u_int);
static void ahc_linux_free_target(struct ahc_softc*,
struct ahc_linux_target*);
static struct ahc_linux_device* ahc_linux_alloc_device(struct ahc_softc*,
struct ahc_linux_target*,
u_int);
static void ahc_linux_free_device(struct ahc_softc*,
struct ahc_linux_device*);
static void ahc_linux_run_device_queue(struct ahc_softc*,
struct ahc_linux_device*);
static void ahc_linux_setup_tag_info_global(char *p);
static aic_option_callback_t ahc_linux_setup_tag_info;
static int aic7xxx_setup(char *s);
static int ahc_linux_next_unit(void);
static void ahc_runq_tasklet(unsigned long data);
static struct ahc_cmd *ahc_linux_run_complete_queue(struct ahc_softc *ahc);
/********************************* Inlines ************************************/
static __inline void ahc_schedule_runq(struct ahc_softc *ahc);
static __inline struct ahc_linux_device*
ahc_linux_get_device(struct ahc_softc *ahc, u_int channel,
u_int target, u_int lun, int alloc);
static __inline void ahc_schedule_completeq(struct ahc_softc *ahc);
static __inline void ahc_linux_check_device_queue(struct ahc_softc *ahc,
struct ahc_linux_device *dev);
static __inline struct ahc_linux_device *
ahc_linux_next_device_to_run(struct ahc_softc *ahc);
static __inline void ahc_linux_run_device_queues(struct ahc_softc *ahc);
static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
struct ahc_dma_seg *sg,
dma_addr_t addr, bus_size_t len);
static __inline void
ahc_schedule_completeq(struct ahc_softc *ahc)
{
if ((ahc->platform_data->flags & AHC_RUN_CMPLT_Q_TIMER) == 0) {
ahc->platform_data->flags |= AHC_RUN_CMPLT_Q_TIMER;
ahc->platform_data->completeq_timer.expires = jiffies;
add_timer(&ahc->platform_data->completeq_timer);
}
}
/*
* Must be called with our lock held.
*/
static __inline void
ahc_schedule_runq(struct ahc_softc *ahc)
{
tasklet_schedule(&ahc->platform_data->runq_tasklet);
}
static __inline struct ahc_linux_device*
ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, u_int target,
u_int lun, int alloc)
{
struct ahc_linux_target *targ;
struct ahc_linux_device *dev;
u_int target_offset;
target_offset = target;
if (channel != 0)
target_offset += 8;
targ = ahc->platform_data->targets[target_offset];
if (targ == NULL) {
if (alloc != 0) {
targ = ahc_linux_alloc_target(ahc, channel, target);
if (targ == NULL)
return (NULL);
} else
return (NULL);
}
dev = targ->devices[lun];
if (dev == NULL && alloc != 0)
dev = ahc_linux_alloc_device(ahc, targ, lun);
return (dev);
}
#define AHC_LINUX_MAX_RETURNED_ERRORS 4
static struct ahc_cmd *
ahc_linux_run_complete_queue(struct ahc_softc *ahc)
{
struct ahc_cmd *acmd;
u_long done_flags;
int with_errors;
with_errors = 0;
ahc_done_lock(ahc, &done_flags);
while ((acmd = TAILQ_FIRST(&ahc->platform_data->completeq)) != NULL) {
Scsi_Cmnd *cmd;
if (with_errors > AHC_LINUX_MAX_RETURNED_ERRORS) {
/*
* Linux uses stack recursion to requeue
* commands that need to be retried. Avoid
* blowing out the stack by "spoon feeding"
* commands that completed with error back
* the operating system in case they are going
* to be retried. "ick"
*/
ahc_schedule_completeq(ahc);
break;
}
TAILQ_REMOVE(&ahc->platform_data->completeq,
acmd, acmd_links.tqe);
cmd = &acmd_scsi_cmd(acmd);
cmd->host_scribble = NULL;
if (ahc_cmd_get_transaction_status(cmd) != DID_OK
|| (cmd->result & 0xFF) != SCSI_STATUS_OK)
with_errors++;
cmd->scsi_done(cmd);
}
ahc_done_unlock(ahc, &done_flags);
return (acmd);
}
static __inline void
ahc_linux_check_device_queue(struct ahc_softc *ahc,
struct ahc_linux_device *dev)
{
if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) != 0
&& dev->active == 0) {
dev->flags &= ~AHC_DEV_FREEZE_TIL_EMPTY;
dev->qfrozen--;
}
if (TAILQ_FIRST(&dev->busyq) == NULL
|| dev->openings == 0 || dev->qfrozen != 0)
return;
ahc_linux_run_device_queue(ahc, dev);
}
static __inline struct ahc_linux_device *
ahc_linux_next_device_to_run(struct ahc_softc *ahc)
{
if ((ahc->flags & AHC_RESOURCE_SHORTAGE) != 0
|| (ahc->platform_data->qfrozen != 0))
return (NULL);
return (TAILQ_FIRST(&ahc->platform_data->device_runq));
}
static __inline void
ahc_linux_run_device_queues(struct ahc_softc *ahc)
{
struct ahc_linux_device *dev;
while ((dev = ahc_linux_next_device_to_run(ahc)) != NULL) {
TAILQ_REMOVE(&ahc->platform_data->device_runq, dev, links);
dev->flags &= ~AHC_DEV_ON_RUN_LIST;
ahc_linux_check_device_queue(ahc, dev);
}
}
static __inline void
ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
{
Scsi_Cmnd *cmd;
cmd = scb->io_ctx;
ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
if (cmd->use_sg != 0) {
struct scatterlist *sg;
sg = (struct scatterlist *)cmd->request_buffer;
pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg,
cmd->sc_data_direction);
} else if (cmd->request_bufflen != 0) {
pci_unmap_single(ahc->dev_softc,
scb->platform_data->buf_busaddr,
cmd->request_bufflen,
cmd->sc_data_direction);
}
}
static __inline int
ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
{
int consumed;
if ((scb->sg_count + 1) > AHC_NSEG)
panic("Too few segs for dma mapping. "
"Increase AHC_NSEG\n");
consumed = 1;
sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
scb->platform_data->xfer_len += len;
if (sizeof(dma_addr_t) > 4
&& (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
sg->len = ahc_htole32(len);
return (consumed);
}
/************************ Host template entry points *************************/
static int ahc_linux_detect(Scsi_Host_Template *);
static int ahc_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *));
static const char *ahc_linux_info(struct Scsi_Host *);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
static int ahc_linux_slave_alloc(Scsi_Device *);
static int ahc_linux_slave_configure(Scsi_Device *);
static void ahc_linux_slave_destroy(Scsi_Device *);
#if defined(__i386__)
static int ahc_linux_biosparam(struct scsi_device*,
struct block_device*,
sector_t, int[]);
#endif
#else
static int ahc_linux_release(struct Scsi_Host *);
static void ahc_linux_select_queue_depth(struct Scsi_Host *host,
Scsi_Device *scsi_devs);
#if defined(__i386__)
static int ahc_linux_biosparam(Disk *, kdev_t, int[]);
#endif
#endif
static int ahc_linux_bus_reset(Scsi_Cmnd *);
static int ahc_linux_dev_reset(Scsi_Cmnd *);
static int ahc_linux_abort(Scsi_Cmnd *);
/*
* Calculate a safe value for AHC_NSEG (as expressed through ahc_linux_nseg).
*
* In pre-2.5.X...
* The midlayer allocates an S/G array dynamically when a command is issued
* using SCSI malloc. This array, which is in an OS dependent format that
* must later be copied to our private S/G list, is sized to house just the
* number of segments needed for the current transfer. Since the code that
* sizes the SCSI malloc pool does not take into consideration fragmentation
* of the pool, executing transactions numbering just a fraction of our
* concurrent transaction limit with list lengths aproaching AHC_NSEG will
* quickly depleat the SCSI malloc pool of usable space. Unfortunately, the
* mid-layer does not properly handle this scsi malloc failures for the S/G
* array and the result can be a lockup of the I/O subsystem. We try to size
* our S/G list so that it satisfies our drivers allocation requirements in
* addition to avoiding fragmentation of the SCSI malloc pool.
*/
static void
ahc_linux_size_nseg(void)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
u_int cur_size;
u_int best_size;
/*
* The SCSI allocator rounds to the nearest 512 bytes
* an cannot allocate across a page boundary. Our algorithm
* is to start at 1K of scsi malloc space per-command and
* loop through all factors of the PAGE_SIZE and pick the best.
*/
best_size = 0;
for (cur_size = 1024; cur_size <= PAGE_SIZE; cur_size *= 2) {
u_int nseg;
nseg = cur_size / sizeof(struct scatterlist);
if (nseg < AHC_LINUX_MIN_NSEG)
continue;
if (best_size == 0) {
best_size = cur_size;
ahc_linux_nseg = nseg;
} else {
u_int best_rem;
u_int cur_rem;
/*
* Compare the traits of the current "best_size"
* with the current size to determine if the
* current size is a better size.
*/
best_rem = best_size % sizeof(struct scatterlist);
cur_rem = cur_size % sizeof(struct scatterlist);
if (cur_rem < best_rem) {
best_size = cur_size;
ahc_linux_nseg = nseg;
}
}
}
#endif
}
/*
* Try to detect an Adaptec 7XXX controller.
*/
static int
ahc_linux_detect(Scsi_Host_Template *template)
{
struct ahc_softc *ahc;
int found = 0;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
/*
* It is a bug that the upper layer takes
* this lock just prior to calling us.
*/
spin_unlock_irq(&io_request_lock);
#endif
/*
* Sanity checking of Linux SCSI data structures so
* that some of our hacks^H^H^H^H^Hassumptions aren't
* violated.
*/
if (offsetof(struct ahc_cmd_internal, end)
> offsetof(struct scsi_cmnd, host_scribble)) {
printf("ahc_linux_detect: SCSI data structures changed.\n");
printf("ahc_linux_detect: Unable to attach\n");
return (0);
}
ahc_linux_size_nseg();
/*
* If we've been passed any parameters, process them now.
*/
if (aic7xxx)
aic7xxx_setup(aic7xxx);
template->proc_name = "aic7xxx";
/*
* Initialize our softc list lock prior to
* probing for any adapters.
*/
ahc_list_lockinit();
found = ahc_linux_pci_init();
if (!ahc_linux_eisa_init())
found++;
/*
* Register with the SCSI layer all
* controllers we've found.
*/
TAILQ_FOREACH(ahc, &ahc_tailq, links) {
if (ahc_linux_register_host(ahc, template) == 0)
found++;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
spin_lock_irq(&io_request_lock);
#endif
aic7xxx_detect_complete++;
return (found);
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
/*
* Free the passed in Scsi_Host memory structures prior to unloading the
* module.
*/
int
ahc_linux_release(struct Scsi_Host * host)
{
struct ahc_softc *ahc;
u_long l;
ahc_list_lock(&l);
if (host != NULL) {
/*
* We should be able to just perform
* the free directly, but check our
* list for extra sanity.
*/
ahc = ahc_find_softc(*(struct ahc_softc **)host->hostdata);
if (ahc != NULL) {
u_long s;
ahc_lock(ahc, &s);
ahc_intr_enable(ahc, FALSE);
ahc_unlock(ahc, &s);
ahc_free(ahc);
}
}
ahc_list_unlock(&l);
return (0);
}
#endif
/*
* Return a string describing the driver.
*/
static const char *
ahc_linux_info(struct Scsi_Host *host)
{
static char buffer[512];
char ahc_info[256];
char *bp;
struct ahc_softc *ahc;
bp = &buffer[0];
ahc = *(struct ahc_softc **)host->hostdata;
memset(bp, 0, sizeof(buffer));
strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
strcat(bp, AIC7XXX_DRIVER_VERSION);
strcat(bp, "\n");
strcat(bp, " <");
strcat(bp, ahc->description);
strcat(bp, ">\n");
strcat(bp, " ");
ahc_controller_info(ahc, ahc_info);
strcat(bp, ahc_info);
strcat(bp, "\n");
return (bp);
}
/*
* Queue an SCB to the controller.
*/
static int
ahc_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
{
struct ahc_softc *ahc;
struct ahc_linux_device *dev;
u_long flags;
ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
/*
* Save the callback on completion function.
*/
cmd->scsi_done = scsi_done;
ahc_midlayer_entrypoint_lock(ahc, &flags);
/*
* Close the race of a command that was in the process of
* being queued to us just as our simq was frozen. Let
* DV commands through so long as we are only frozen to
* perform DV.
*/
if (ahc->platform_data->qfrozen != 0) {
ahc_cmd_set_transaction_status(cmd, CAM_REQUEUE_REQ);
ahc_linux_queue_cmd_complete(ahc, cmd);
ahc_schedule_completeq(ahc);
ahc_midlayer_entrypoint_unlock(ahc, &flags);
return (0);
}
dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id,
cmd->device->lun, /*alloc*/TRUE);
if (dev == NULL) {
ahc_cmd_set_transaction_status(cmd, CAM_RESRC_UNAVAIL);
ahc_linux_queue_cmd_complete(ahc, cmd);
ahc_schedule_completeq(ahc);
ahc_midlayer_entrypoint_unlock(ahc, &flags);
printf("%s: aic7xxx_linux_queue - Unable to allocate device!\n",
ahc_name(ahc));
return (0);
}
cmd->result = CAM_REQ_INPROG << 16;
TAILQ_INSERT_TAIL(&dev->busyq, (struct ahc_cmd *)cmd, acmd_links.tqe);
if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) {
TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links);
dev->flags |= AHC_DEV_ON_RUN_LIST;
ahc_linux_run_device_queues(ahc);
}
ahc_midlayer_entrypoint_unlock(ahc, &flags);
return (0);
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
static int
ahc_linux_slave_alloc(Scsi_Device *device)
{
struct ahc_softc *ahc;
ahc = *((struct ahc_softc **)device->host->hostdata);
if (bootverbose)
printf("%s: Slave Alloc %d\n", ahc_name(ahc), device->id);
return (0);
}
static int
ahc_linux_slave_configure(Scsi_Device *device)
{
struct ahc_softc *ahc;
struct ahc_linux_device *dev;
u_long flags;
ahc = *((struct ahc_softc **)device->host->hostdata);
if (bootverbose)
printf("%s: Slave Configure %d\n", ahc_name(ahc), device->id);
ahc_midlayer_entrypoint_lock(ahc, &flags);
/*
* Since Linux has attached to the device, configure
* it so we don't free and allocate the device
* structure on every command.
*/
dev = ahc_linux_get_device(ahc, device->channel,
device->id, device->lun,
/*alloc*/TRUE);
if (dev != NULL) {
dev->flags &= ~AHC_DEV_UNCONFIGURED;
dev->scsi_device = device;
ahc_linux_device_queue_depth(ahc, dev);
}
ahc_midlayer_entrypoint_unlock(ahc, &flags);
/* Initial Domain Validation */
if (!spi_initial_dv(device->sdev_target))
spi_dv_device(device);
return (0);
}
static void
ahc_linux_slave_destroy(Scsi_Device *device)
{
struct ahc_softc *ahc;
struct ahc_linux_device *dev;
u_long flags;
ahc = *((struct ahc_softc **)device->host->hostdata);
if (bootverbose)
printf("%s: Slave Destroy %d\n", ahc_name(ahc), device->id);
ahc_midlayer_entrypoint_lock(ahc, &flags);
dev = ahc_linux_get_device(ahc, device->channel,
device->id, device->lun,
/*alloc*/FALSE);
/*
* Filter out "silly" deletions of real devices by only
* deleting devices that have had slave_configure()
* called on them. All other devices that have not
* been configured will automatically be deleted by
* the refcounting process.
*/
if (dev != NULL
&& (dev->flags & AHC_DEV_SLAVE_CONFIGURED) != 0) {
dev->flags |= AHC_DEV_UNCONFIGURED;
if (TAILQ_EMPTY(&dev->busyq)
&& dev->active == 0
&& (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0)
ahc_linux_free_device(ahc, dev);
}
ahc_midlayer_entrypoint_unlock(ahc, &flags);
}
#else
/*
* Sets the queue depth for each SCSI device hanging
* off the input host adapter.
*/
static void
ahc_linux_select_queue_depth(struct Scsi_Host *host, Scsi_Device *scsi_devs)
{
Scsi_Device *device;
Scsi_Device *ldev;
struct ahc_softc *ahc;
u_long flags;
ahc = *((struct ahc_softc **)host->hostdata);
ahc_lock(ahc, &flags);
for (device = scsi_devs; device != NULL; device = device->next) {
/*
* Watch out for duplicate devices. This works around
* some quirks in how the SCSI scanning code does its
* device management.
*/
for (ldev = scsi_devs; ldev != device; ldev = ldev->next) {
if (ldev->host == device->host
&& ldev->channel == device->channel
&& ldev->id == device->id
&& ldev->lun == device->lun)
break;
}
/* Skip duplicate. */
if (ldev != device)
continue;
if (device->host == host) {
struct ahc_linux_device *dev;
/*
* Since Linux has attached to the device, configure
* it so we don't free and allocate the device
* structure on every command.
*/
dev = ahc_linux_get_device(ahc, device->channel,
device->id, device->lun,
/*alloc*/TRUE);
if (dev != NULL) {
dev->flags &= ~AHC_DEV_UNCONFIGURED;
dev->scsi_device = device;
ahc_linux_device_queue_depth(ahc, dev);
device->queue_depth = dev->openings
+ dev->active;
if ((dev->flags & (AHC_DEV_Q_BASIC
| AHC_DEV_Q_TAGGED)) == 0) {
/*
* We allow the OS to queue 2 untagged
* transactions to us at any time even
* though we can only execute them
* serially on the controller/device.
* This should remove some latency.
*/
device->queue_depth = 2;
}
}
}
}
ahc_unlock(ahc, &flags);
}
#endif
#if defined(__i386__)
/*
* Return the disk geometry for the given SCSI device.
*/
static int
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
sector_t capacity, int geom[])
{
uint8_t *bh;
#else
ahc_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
{
struct scsi_device *sdev = disk->device;
u_long capacity = disk->capacity;
struct buffer_head *bh;
#endif
int heads;
int sectors;
int cylinders;
int ret;
int extended;
struct ahc_softc *ahc;
u_int channel;
ahc = *((struct ahc_softc **)sdev->host->hostdata);
channel = sdev->channel;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
bh = scsi_bios_ptable(bdev);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,17)
bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, block_size(dev));
#else
bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, 1024);
#endif
if (bh) {
ret = scsi_partsize(bh, capacity,
&geom[2], &geom[0], &geom[1]);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
kfree(bh);
#else
brelse(bh);
#endif
if (ret != -1)
return (ret);
}
heads = 64;
sectors = 32;
cylinders = aic_sector_div(capacity, heads, sectors);
if (aic7xxx_extended != 0)
extended = 1;
else if (channel == 0)
extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
else
extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
if (extended && cylinders >= 1024) {
heads = 255;
sectors = 63;
cylinders = aic_sector_div(capacity, heads, sectors);
}
geom[0] = heads;
geom[1] = sectors;
geom[2] = cylinders;
return (0);
}
#endif
/*
* Abort the current SCSI command(s).
*/
static int
ahc_linux_abort(Scsi_Cmnd *cmd)
{
int error;
error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
if (error != 0)
printf("aic7xxx_abort returns 0x%x\n", error);
return (error);
}
/*
* Attempt to send a target reset message to the device that timed out.
*/
static int
ahc_linux_dev_reset(Scsi_Cmnd *cmd)
{
int error;
error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
if (error != 0)
printf("aic7xxx_dev_reset returns 0x%x\n", error);
return (error);
}
/*
* Reset the SCSI bus.
*/
static int
ahc_linux_bus_reset(Scsi_Cmnd *cmd)
{
struct ahc_softc *ahc;
u_long s;
int found;
ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
ahc_midlayer_entrypoint_lock(ahc, &s);
found = ahc_reset_channel(ahc, cmd->device->channel + 'A',
/*initiate reset*/TRUE);
ahc_linux_run_complete_queue(ahc);
ahc_midlayer_entrypoint_unlock(ahc, &s);
if (bootverbose)
printf("%s: SCSI bus reset delivered. "
"%d SCBs aborted.\n", ahc_name(ahc), found);
return SUCCESS;
}
Scsi_Host_Template aic7xxx_driver_template = {
.module = THIS_MODULE,
.name = "aic7xxx",
.proc_info = ahc_linux_proc_info,
.info = ahc_linux_info,
.queuecommand = ahc_linux_queue,
.eh_abort_handler = ahc_linux_abort,
.eh_device_reset_handler = ahc_linux_dev_reset,
.eh_bus_reset_handler = ahc_linux_bus_reset,
#if defined(__i386__)
.bios_param = ahc_linux_biosparam,
#endif
.can_queue = AHC_MAX_QUEUE,
.this_id = -1,
.cmd_per_lun = 2,
.use_clustering = ENABLE_CLUSTERING,
.slave_alloc = ahc_linux_slave_alloc,
.slave_configure = ahc_linux_slave_configure,
.slave_destroy = ahc_linux_slave_destroy,
};
/**************************** Tasklet Handler *********************************/
/*
* In 2.4.X and above, this routine is called from a tasklet,
* so we must re-acquire our lock prior to executing this code.
* In all prior kernels, ahc_schedule_runq() calls this routine
* directly and ahc_schedule_runq() is called with our lock held.
*/
static void
ahc_runq_tasklet(unsigned long data)
{
struct ahc_softc* ahc;
struct ahc_linux_device *dev;
u_long flags;
ahc = (struct ahc_softc *)data;
ahc_lock(ahc, &flags);
while ((dev = ahc_linux_next_device_to_run(ahc)) != NULL) {
TAILQ_REMOVE(&ahc->platform_data->device_runq, dev, links);
dev->flags &= ~AHC_DEV_ON_RUN_LIST;
ahc_linux_check_device_queue(ahc, dev);
/* Yeild to our interrupt handler */
ahc_unlock(ahc, &flags);
ahc_lock(ahc, &flags);
}
ahc_unlock(ahc, &flags);
}
/******************************** Macros **************************************/
#define BUILD_SCSIID(ahc, cmd) \
((((cmd)->device->id << TID_SHIFT) & TID) \
| (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
| (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
/******************************** Bus DMA *************************************/
int
ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
bus_size_t alignment, bus_size_t boundary,
dma_addr_t lowaddr, dma_addr_t highaddr,
bus_dma_filter_t *filter, void *filterarg,
bus_size_t maxsize, int nsegments,
bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
{
bus_dma_tag_t dmat;
dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
if (dmat == NULL)
return (ENOMEM);
/*
* Linux is very simplistic about DMA memory. For now don't
* maintain all specification information. Once Linux supplies
* better facilities for doing these operations, or the
* needs of this particular driver change, we might need to do
* more here.
*/
dmat->alignment = alignment;
dmat->boundary = boundary;
dmat->maxsize = maxsize;
*ret_tag = dmat;
return (0);
}
void
ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
{
free(dmat, M_DEVBUF);
}
int
ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
int flags, bus_dmamap_t *mapp)
{
bus_dmamap_t map;
map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT);
if (map == NULL)
return (ENOMEM);
/*
* Although we can dma data above 4GB, our
* "consistent" memory is below 4GB for
* space efficiency reasons (only need a 4byte
* address). For this reason, we have to reset
* our dma mask when doing allocations.
*/
if (ahc->dev_softc != NULL)
if (pci_set_dma_mask(ahc->dev_softc, 0xFFFFFFFF)) {
printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
kfree(map);
return (ENODEV);
}
*vaddr = pci_alloc_consistent(ahc->dev_softc,
dmat->maxsize, &map->bus_addr);
if (ahc->dev_softc != NULL)
if (pci_set_dma_mask(ahc->dev_softc,
ahc->platform_data->hw_dma_mask)) {
printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
kfree(map);
return (ENODEV);
}
if (*vaddr == NULL)
return (ENOMEM);
*mapp = map;
return(0);
}
void
ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
void* vaddr, bus_dmamap_t map)
{
pci_free_consistent(ahc->dev_softc, dmat->maxsize,
vaddr, map->bus_addr);
}
int
ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
void *cb_arg, int flags)
{
/*
* Assume for now that this will only be used during
* initialization and not for per-transaction buffer mapping.
*/
bus_dma_segment_t stack_sg;
stack_sg.ds_addr = map->bus_addr;
stack_sg.ds_len = dmat->maxsize;
cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
return (0);
}
void
ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
{
/*
* The map may is NULL in our < 2.3.X implementation.
* Now it's 2.6.5, but just in case...
*/
BUG_ON(map == NULL);
free(map, M_DEVBUF);
}
int
ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
{
/* Nothing to do */
return (0);
}
/********************* Platform Dependent Functions ***************************/
/*
* Compare "left hand" softc with "right hand" softc, returning:
* < 0 - lahc has a lower priority than rahc
* 0 - Softcs are equal
* > 0 - lahc has a higher priority than rahc
*/
int
ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc)
{
int value;
int rvalue;
int lvalue;
/*
* Under Linux, cards are ordered as follows:
* 1) VLB/EISA BIOS enabled devices sorted by BIOS address.
* 2) PCI devices with BIOS enabled sorted by bus/slot/func.
* 3) All remaining VLB/EISA devices sorted by ioport.
* 4) All remaining PCI devices sorted by bus/slot/func.
*/
value = (lahc->flags & AHC_BIOS_ENABLED)
- (rahc->flags & AHC_BIOS_ENABLED);
if (value != 0)
/* Controllers with BIOS enabled have a *higher* priority */
return (value);
/*
* Same BIOS setting, now sort based on bus type.
* EISA and VL controllers sort together. EISA/VL
* have higher priority than PCI.
*/
rvalue = (rahc->chip & AHC_BUS_MASK);
if (rvalue == AHC_VL)
rvalue = AHC_EISA;
lvalue = (lahc->chip & AHC_BUS_MASK);
if (lvalue == AHC_VL)
lvalue = AHC_EISA;
value = rvalue - lvalue;
if (value != 0)
return (value);
/* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */
switch (rvalue) {
#ifdef CONFIG_PCI
case AHC_PCI:
{
char primary_channel;
if (aic7xxx_reverse_scan != 0)
value = ahc_get_pci_bus(lahc->dev_softc)
- ahc_get_pci_bus(rahc->dev_softc);
else
value = ahc_get_pci_bus(rahc->dev_softc)
- ahc_get_pci_bus(lahc->dev_softc);
if (value != 0)
break;
if (aic7xxx_reverse_scan != 0)
value = ahc_get_pci_slot(lahc->dev_softc)
- ahc_get_pci_slot(rahc->dev_softc);
else
value = ahc_get_pci_slot(rahc->dev_softc)
- ahc_get_pci_slot(lahc->dev_softc);
if (value != 0)
break;
/*
* On multi-function devices, the user can choose
* to have function 1 probed before function 0.
* Give whichever channel is the primary channel
* the highest priority.
*/
primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A';
value = -1;
if (lahc->channel == primary_channel)
value = 1;
break;
}
#endif
case AHC_EISA:
if ((rahc->flags & AHC_BIOS_ENABLED) != 0) {
value = rahc->platform_data->bios_address
- lahc->platform_data->bios_address;
} else {
value = rahc->bsh.ioport
- lahc->bsh.ioport;
}
break;
default:
panic("ahc_softc_sort: invalid bus type");
}
return (value);
}
static void
ahc_linux_setup_tag_info_global(char *p)
{
int tags, i, j;
tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
printf("Setting Global Tags= %d\n", tags);
for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) {
for (j = 0; j < AHC_NUM_TARGETS; j++) {
aic7xxx_tag_info[i].tag_commands[j] = tags;
}
}
}
static void
ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
{
if ((instance >= 0) && (targ >= 0)
&& (instance < NUM_ELEMENTS(aic7xxx_tag_info))
&& (targ < AHC_NUM_TARGETS)) {
aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
if (bootverbose)
printf("tag_info[%d:%d] = %d\n", instance, targ, value);
}
}
/*
* Handle Linux boot parameters. This routine allows for assigning a value
* to a parameter with a ':' between the parameter and the value.
* ie. aic7xxx=stpwlev:1,extended
*/
static int
aic7xxx_setup(char *s)
{
int i, n;
char *p;
char *end;
static struct {
const char *name;
uint32_t *flag;
} options[] = {
{ "extended", &aic7xxx_extended },
{ "no_reset", &aic7xxx_no_reset },
{ "verbose", &aic7xxx_verbose },
{ "allow_memio", &aic7xxx_allow_memio},
#ifdef AHC_DEBUG
{ "debug", &ahc_debug },
#endif
{ "reverse_scan", &aic7xxx_reverse_scan },
{ "no_probe", &aic7xxx_probe_eisa_vl },
{ "probe_eisa_vl", &aic7xxx_probe_eisa_vl },
{ "periodic_otag", &aic7xxx_periodic_otag },
{ "pci_parity", &aic7xxx_pci_parity },
{ "seltime", &aic7xxx_seltime },
{ "tag_info", NULL },
{ "global_tag_depth", NULL },
{ "dv", NULL }
};
end = strchr(s, '\0');
/*
* XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
* will never be 0 in this case.
*/
n = 0;
while ((p = strsep(&s, ",.")) != NULL) {
if (*p == '\0')
continue;
for (i = 0; i < NUM_ELEMENTS(options); i++) {
n = strlen(options[i].name);
if (strncmp(options[i].name, p, n) == 0)
break;
}
if (i == NUM_ELEMENTS(options))
continue;
if (strncmp(p, "global_tag_depth", n) == 0) {
ahc_linux_setup_tag_info_global(p + n);
} else if (strncmp(p, "tag_info", n) == 0) {
s = aic_parse_brace_option("tag_info", p + n, end,
2, ahc_linux_setup_tag_info, 0);
} else if (p[n] == ':') {
*(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
} else if (strncmp(p, "verbose", n) == 0) {
*(options[i].flag) = 1;
} else {
*(options[i].flag) ^= 0xFFFFFFFF;
}
}
return 1;
}
__setup("aic7xxx=", aic7xxx_setup);
uint32_t aic7xxx_verbose;
int
ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template)
{
char buf[80];
struct Scsi_Host *host;
char *new_name;
u_long s;
template->name = ahc->description;
host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
if (host == NULL)
return (ENOMEM);
*((struct ahc_softc **)host->hostdata) = ahc;
ahc_lock(ahc, &s);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
scsi_assign_lock(host, &ahc->platform_data->spin_lock);
#elif AHC_SCSI_HAS_HOST_LOCK != 0
host->lock = &ahc->platform_data->spin_lock;
#endif
ahc->platform_data->host = host;
host->can_queue = AHC_MAX_QUEUE;
host->cmd_per_lun = 2;
/* XXX No way to communicate the ID for multiple channels */
host->this_id = ahc->our_id;
host->irq = ahc->platform_data->irq;
host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
host->max_lun = AHC_NUM_LUNS;
host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
host->sg_tablesize = AHC_NSEG;
ahc_set_unit(ahc, ahc_linux_next_unit());
sprintf(buf, "scsi%d", host->host_no);
new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
if (new_name != NULL) {
strcpy(new_name, buf);
ahc_set_name(ahc, new_name);
}
host->unique_id = ahc->unit;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
scsi_set_pci_device(host, ahc->dev_softc);
#endif
ahc_linux_initialize_scsi_bus(ahc);
ahc_intr_enable(ahc, TRUE);
ahc_unlock(ahc, &s);
host->transportt = ahc_linux_transport_template;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */
scsi_scan_host(host);
#endif
return (0);
}
uint64_t
ahc_linux_get_memsize(void)
{
struct sysinfo si;
si_meminfo(&si);
return ((uint64_t)si.totalram << PAGE_SHIFT);
}
/*
* Find the smallest available unit number to use
* for a new device. We don't just use a static
* count to handle the "repeated hot-(un)plug"
* scenario.
*/
static int
ahc_linux_next_unit(void)
{
struct ahc_softc *ahc;
int unit;
unit = 0;
retry:
TAILQ_FOREACH(ahc, &ahc_tailq, links) {
if (ahc->unit == unit) {
unit++;
goto retry;
}
}
return (unit);
}
/*
* Place the SCSI bus into a known state by either resetting it,
* or forcing transfer negotiations on the next command to any
* target.
*/
void
ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
{
int i;
int numtarg;
i = 0;
numtarg = 0;
if (aic7xxx_no_reset != 0)
ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
if ((ahc->flags & AHC_RESET_BUS_A) != 0)
ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
else
numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
if ((ahc->features & AHC_TWIN) != 0) {
if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
} else {
if (numtarg == 0)
i = 8;
numtarg += 8;
}
}
/*
* Force negotiation to async for all targets that
* will not see an initial bus reset.
*/
for (; i < numtarg; i++) {
struct ahc_devinfo devinfo;
struct ahc_initiator_tinfo *tinfo;
struct ahc_tmode_tstate *tstate;
u_int our_id;
u_int target_id;
char channel;
channel = 'A';
our_id = ahc->our_id;
target_id = i;
if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
channel = 'B';
our_id = ahc->our_id_b;
target_id = i % 8;
}
tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
target_id, &tstate);
ahc_compile_devinfo(&devinfo, our_id, target_id,
CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
ahc_update_neg_request(ahc, &devinfo, tstate,
tinfo, AHC_NEG_ALWAYS);
}
/* Give the bus some time to recover */
if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
ahc_linux_freeze_simq(ahc);
init_timer(&ahc->platform_data->reset_timer);
ahc->platform_data->reset_timer.data = (u_long)ahc;
ahc->platform_data->reset_timer.expires =
jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000;
ahc->platform_data->reset_timer.function =
ahc_linux_release_simq;
add_timer(&ahc->platform_data->reset_timer);
}
}
int
ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
{
ahc->platform_data =
malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
if (ahc->platform_data == NULL)
return (ENOMEM);
memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
TAILQ_INIT(&ahc->platform_data->completeq);
TAILQ_INIT(&ahc->platform_data->device_runq);
ahc->platform_data->irq = AHC_LINUX_NOIRQ;
ahc->platform_data->hw_dma_mask = 0xFFFFFFFF;
ahc_lockinit(ahc);
ahc_done_lockinit(ahc);
init_timer(&ahc->platform_data->completeq_timer);
ahc->platform_data->completeq_timer.data = (u_long)ahc;
ahc->platform_data->completeq_timer.function =
(ahc_linux_callback_t *)ahc_linux_thread_run_complete_queue;
init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
tasklet_init(&ahc->platform_data->runq_tasklet, ahc_runq_tasklet,
(unsigned long)ahc);
ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
if (aic7xxx_pci_parity == 0)
ahc->flags |= AHC_DISABLE_PCI_PERR;
return (0);
}
void
ahc_platform_free(struct ahc_softc *ahc)
{
struct ahc_linux_target *targ;
struct ahc_linux_device *dev;
int i, j;
if (ahc->platform_data != NULL) {
del_timer_sync(&ahc->platform_data->completeq_timer);
tasklet_kill(&ahc->platform_data->runq_tasklet);
if (ahc->platform_data->host != NULL) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
scsi_remove_host(ahc->platform_data->host);
#endif
scsi_host_put(ahc->platform_data->host);
}
/* destroy all of the device and target objects */
for (i = 0; i < AHC_NUM_TARGETS; i++) {
targ = ahc->platform_data->targets[i];
if (targ != NULL) {
/* Keep target around through the loop. */
targ->refcount++;
for (j = 0; j < AHC_NUM_LUNS; j++) {
if (targ->devices[j] == NULL)
continue;
dev = targ->devices[j];
ahc_linux_free_device(ahc, dev);
}
/*
* Forcibly free the target now that
* all devices are gone.
*/
ahc_linux_free_target(ahc, targ);
}
}
if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
free_irq(ahc->platform_data->irq, ahc);
if (ahc->tag == BUS_SPACE_PIO
&& ahc->bsh.ioport != 0)
release_region(ahc->bsh.ioport, 256);
if (ahc->tag == BUS_SPACE_MEMIO
&& ahc->bsh.maddr != NULL) {
iounmap(ahc->bsh.maddr);
release_mem_region(ahc->platform_data->mem_busaddr,
0x1000);
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
/*
* In 2.4 we detach from the scsi midlayer before the PCI
* layer invokes our remove callback. No per-instance
* detach is provided, so we must reach inside the PCI
* subsystem's internals and detach our driver manually.
*/
if (ahc->dev_softc != NULL)
ahc->dev_softc->driver = NULL;
#endif
free(ahc->platform_data, M_DEVBUF);
}
}
void
ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
{
ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
SCB_GET_CHANNEL(ahc, scb),
SCB_GET_LUN(scb), SCB_LIST_NULL,
ROLE_UNKNOWN, CAM_REQUEUE_REQ);
}
void
ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
ahc_queue_alg alg)
{
struct ahc_linux_device *dev;
int was_queuing;
int now_queuing;
dev = ahc_linux_get_device(ahc, devinfo->channel - 'A',
devinfo->target,
devinfo->lun, /*alloc*/FALSE);
if (dev == NULL)
return;
was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
switch (alg) {
default:
case AHC_QUEUE_NONE:
now_queuing = 0;
break;
case AHC_QUEUE_BASIC:
now_queuing = AHC_DEV_Q_BASIC;
break;
case AHC_QUEUE_TAGGED:
now_queuing = AHC_DEV_Q_TAGGED;
break;
}
if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
&& (was_queuing != now_queuing)
&& (dev->active != 0)) {
dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
dev->qfrozen++;
}
dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
if (now_queuing) {
u_int usertags;
usertags = ahc_linux_user_tagdepth(ahc, devinfo);
if (!was_queuing) {
/*
* Start out agressively and allow our
* dynamic queue depth algorithm to take
* care of the rest.
*/
dev->maxtags = usertags;
dev->openings = dev->maxtags - dev->active;
}
if (dev->maxtags == 0) {
/*
* Queueing is disabled by the user.
*/
dev->openings = 1;
} else if (alg == AHC_QUEUE_TAGGED) {
dev->flags |= AHC_DEV_Q_TAGGED;
if (aic7xxx_periodic_otag != 0)
dev->flags |= AHC_DEV_PERIODIC_OTAG;
} else
dev->flags |= AHC_DEV_Q_BASIC;
} else {
/* We can only have one opening. */
dev->maxtags = 0;
dev->openings = 1 - dev->active;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
if (dev->scsi_device != NULL) {
switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
case AHC_DEV_Q_BASIC:
scsi_adjust_queue_depth(dev->scsi_device,
MSG_SIMPLE_TASK,
dev->openings + dev->active);
break;
case AHC_DEV_Q_TAGGED:
scsi_adjust_queue_depth(dev->scsi_device,
MSG_ORDERED_TASK,
dev->openings + dev->active);
break;
default:
/*
* We allow the OS to queue 2 untagged transactions to
* us at any time even though we can only execute them
* serially on the controller/device. This should
* remove some latency.
*/
scsi_adjust_queue_depth(dev->scsi_device,
/*NON-TAGGED*/0,
/*queue depth*/2);
break;
}
}
#endif
}
int
ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
int lun, u_int tag, role_t role, uint32_t status)
{
int chan;
int maxchan;
int targ;
int maxtarg;
int clun;
int maxlun;
int count;
if (tag != SCB_LIST_NULL)
return (0);
chan = 0;
if (channel != ALL_CHANNELS) {
chan = channel - 'A';
maxchan = chan + 1;
} else {
maxchan = (ahc->features & AHC_TWIN) ? 2 : 1;
}
targ = 0;
if (target != CAM_TARGET_WILDCARD) {
targ = target;
maxtarg = targ + 1;
} else {
maxtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
}
clun = 0;
if (lun != CAM_LUN_WILDCARD) {
clun = lun;
maxlun = clun + 1;
} else {
maxlun = AHC_NUM_LUNS;
}
count = 0;
for (; chan < maxchan; chan++) {
for (; targ < maxtarg; targ++) {
for (; clun < maxlun; clun++) {
struct ahc_linux_device *dev;
struct ahc_busyq *busyq;
struct ahc_cmd *acmd;
dev = ahc_linux_get_device(ahc, chan,
targ, clun,
/*alloc*/FALSE);
if (dev == NULL)
continue;
busyq = &dev->busyq;
while ((acmd = TAILQ_FIRST(busyq)) != NULL) {
Scsi_Cmnd *cmd;
cmd = &acmd_scsi_cmd(acmd);
TAILQ_REMOVE(busyq, acmd,
acmd_links.tqe);
count++;
cmd->result = status << 16;
ahc_linux_queue_cmd_complete(ahc, cmd);
}
}
}
}
return (count);
}
static void
ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc)
{
u_long flags;
ahc_lock(ahc, &flags);
del_timer(&ahc->platform_data->completeq_timer);
ahc->platform_data->flags &= ~AHC_RUN_CMPLT_Q_TIMER;
ahc_linux_run_complete_queue(ahc);
ahc_unlock(ahc, &flags);
}
static u_int
ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
{
static int warned_user;
u_int tags;
tags = 0;
if ((ahc->user_discenable & devinfo->target_mask) != 0) {
if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
if (warned_user == 0) {
printf(KERN_WARNING
"aic7xxx: WARNING: Insufficient tag_info instances\n"
"aic7xxx: for installed controllers. Using defaults\n"
"aic7xxx: Please update the aic7xxx_tag_info array in\n"
"aic7xxx: the aic7xxx_osm..c source file.\n");
warned_user++;
}
tags = AHC_MAX_QUEUE;
} else {
adapter_tag_info_t *tag_info;
tag_info = &aic7xxx_tag_info[ahc->unit];
tags = tag_info->tag_commands[devinfo->target_offset];
if (tags > AHC_MAX_QUEUE)
tags = AHC_MAX_QUEUE;
}
}
return (tags);
}
/*
* Determines the queue depth for a given device.
*/
static void
ahc_linux_device_queue_depth(struct ahc_softc *ahc,
struct ahc_linux_device *dev)
{
struct ahc_devinfo devinfo;
u_int tags;
ahc_compile_devinfo(&devinfo,
dev->target->channel == 0
? ahc->our_id : ahc->our_id_b,
dev->target->target, dev->lun,
dev->target->channel == 0 ? 'A' : 'B',
ROLE_INITIATOR);
tags = ahc_linux_user_tagdepth(ahc, &devinfo);
if (tags != 0
&& dev->scsi_device != NULL
&& dev->scsi_device->tagged_supported != 0) {
ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED);
ahc_print_devinfo(ahc, &devinfo);
printf("Tagged Queuing enabled. Depth %d\n", tags);
} else {
ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE);
}
}
static void
ahc_linux_run_device_queue(struct ahc_softc *ahc, struct ahc_linux_device *dev)
{
struct ahc_cmd *acmd;
struct scsi_cmnd *cmd;
struct scb *scb;
struct hardware_scb *hscb;
struct ahc_initiator_tinfo *tinfo;
struct ahc_tmode_tstate *tstate;
uint16_t mask;
if ((dev->flags & AHC_DEV_ON_RUN_LIST) != 0)
panic("running device on run list");
while ((acmd = TAILQ_FIRST(&dev->busyq)) != NULL
&& dev->openings > 0 && dev->qfrozen == 0) {
/*
* Schedule us to run later. The only reason we are not
* running is because the whole controller Q is frozen.
*/
if (ahc->platform_data->qfrozen != 0) {
TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq,
dev, links);
dev->flags |= AHC_DEV_ON_RUN_LIST;
return;
}
/*
* Get an scb to use.
*/
if ((scb = ahc_get_scb(ahc)) == NULL) {
TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq,
dev, links);
dev->flags |= AHC_DEV_ON_RUN_LIST;
ahc->flags |= AHC_RESOURCE_SHORTAGE;
return;
}
TAILQ_REMOVE(&dev->busyq, acmd, acmd_links.tqe);
cmd = &acmd_scsi_cmd(acmd);
scb->io_ctx = cmd;
scb->platform_data->dev = dev;
hscb = scb->hscb;
cmd->host_scribble = (char *)scb;
/*
* Fill out basics of the HSCB.
*/
hscb->control = 0;
hscb->scsiid = BUILD_SCSIID(ahc, cmd);
hscb->lun = cmd->device->lun;
mask = SCB_GET_TARGET_MASK(ahc, scb);
tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
SCB_GET_OUR_ID(scb),
SCB_GET_TARGET(ahc, scb), &tstate);
hscb->scsirate = tinfo->scsirate;
hscb->scsioffset = tinfo->curr.offset;
if ((tstate->ultraenb & mask) != 0)
hscb->control |= ULTRAENB;
if ((ahc->user_discenable & mask) != 0)
hscb->control |= DISCENB;
if ((tstate->auto_negotiate & mask) != 0) {
scb->flags |= SCB_AUTO_NEGOTIATE;
scb->hscb->control |= MK_MESSAGE;
}
if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
int msg_bytes;
uint8_t tag_msgs[2];
msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
hscb->control |= tag_msgs[0];
if (tag_msgs[0] == MSG_ORDERED_TASK)
dev->commands_since_idle_or_otag = 0;
} else
#endif
if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
&& (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
hscb->control |= MSG_ORDERED_TASK;
dev->commands_since_idle_or_otag = 0;
} else {
hscb->control |= MSG_SIMPLE_TASK;
}
}
hscb->cdb_len = cmd->cmd_len;
if (hscb->cdb_len <= 12) {
memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
} else {
memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
scb->flags |= SCB_CDB32_PTR;
}
scb->platform_data->xfer_len = 0;
ahc_set_residual(scb, 0);
ahc_set_sense_residual(scb, 0);
scb->sg_count = 0;
if (cmd->use_sg != 0) {
struct ahc_dma_seg *sg;
struct scatterlist *cur_seg;
struct scatterlist *end_seg;
int nseg;
cur_seg = (struct scatterlist *)cmd->request_buffer;
nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
cmd->sc_data_direction);
end_seg = cur_seg + nseg;
/* Copy the segments into the SG list. */
sg = scb->sg_list;
/*
* The sg_count may be larger than nseg if
* a transfer crosses a 32bit page.
*/
while (cur_seg < end_seg) {
dma_addr_t addr;
bus_size_t len;
int consumed;
addr = sg_dma_address(cur_seg);
len = sg_dma_len(cur_seg);
consumed = ahc_linux_map_seg(ahc, scb,
sg, addr, len);
sg += consumed;
scb->sg_count += consumed;
cur_seg++;
}
sg--;
sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
/*
* Reset the sg list pointer.
*/
scb->hscb->sgptr =
ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
/*
* Copy the first SG into the "current"
* data pointer area.
*/
scb->hscb->dataptr = scb->sg_list->addr;
scb->hscb->datacnt = scb->sg_list->len;
} else if (cmd->request_bufflen != 0) {
struct ahc_dma_seg *sg;
dma_addr_t addr;
sg = scb->sg_list;
addr = pci_map_single(ahc->dev_softc,
cmd->request_buffer,
cmd->request_bufflen,
cmd->sc_data_direction);
scb->platform_data->buf_busaddr = addr;
scb->sg_count = ahc_linux_map_seg(ahc, scb,
sg, addr,
cmd->request_bufflen);
sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
/*
* Reset the sg list pointer.
*/
scb->hscb->sgptr =
ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
/*
* Copy the first SG into the "current"
* data pointer area.
*/
scb->hscb->dataptr = sg->addr;
scb->hscb->datacnt = sg->len;
} else {
scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
scb->hscb->dataptr = 0;
scb->hscb->datacnt = 0;
scb->sg_count = 0;
}
ahc_sync_sglist(ahc, scb, BUS_DMASYNC_PREWRITE);
LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
dev->openings--;
dev->active++;
dev->commands_issued++;
if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
dev->commands_since_idle_or_otag++;
/*
* We only allow one untagged transaction
* per target in the initiator role unless
* we are storing a full busy target *lun*
* table in SCB space.
*/
if ((scb->hscb->control & (TARGET_SCB|TAG_ENB)) == 0
&& (ahc->features & AHC_SCB_BTT) == 0) {
struct scb_tailq *untagged_q;
int target_offset;
target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
untagged_q = &(ahc->untagged_queues[target_offset]);
TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
scb->flags |= SCB_UNTAGGEDQ;
if (TAILQ_FIRST(untagged_q) != scb)
continue;
}
scb->flags |= SCB_ACTIVE;
ahc_queue_scb(ahc, scb);
}
}
/*
* SCSI controller interrupt handler.
*/
irqreturn_t
ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
{
struct ahc_softc *ahc;
u_long flags;
int ours;
ahc = (struct ahc_softc *) dev_id;
ahc_lock(ahc, &flags);
ours = ahc_intr(ahc);
if (ahc_linux_next_device_to_run(ahc) != NULL)
ahc_schedule_runq(ahc);
ahc_linux_run_complete_queue(ahc);
ahc_unlock(ahc, &flags);
return IRQ_RETVAL(ours);
}
void
ahc_platform_flushwork(struct ahc_softc *ahc)
{
while (ahc_linux_run_complete_queue(ahc) != NULL)
;
}
static struct ahc_linux_target*
ahc_linux_alloc_target(struct ahc_softc *ahc, u_int channel, u_int target)
{
struct ahc_linux_target *targ;
u_int target_offset;
target_offset = target;
if (channel != 0)
target_offset += 8;
targ = malloc(sizeof(*targ), M_DEVBUG, M_NOWAIT);
if (targ == NULL)
return (NULL);
memset(targ, 0, sizeof(*targ));
targ->channel = channel;
targ->target = target;
targ->ahc = ahc;
ahc->platform_data->targets[target_offset] = targ;
return (targ);
}
static void
ahc_linux_free_target(struct ahc_softc *ahc, struct ahc_linux_target *targ)
{
struct ahc_devinfo devinfo;
struct ahc_initiator_tinfo *tinfo;
struct ahc_tmode_tstate *tstate;
u_int our_id;
u_int target_offset;
char channel;
/*
* Force a negotiation to async/narrow on any
* future command to this device unless a bus
* reset occurs between now and that command.
*/
channel = 'A' + targ->channel;
our_id = ahc->our_id;
target_offset = targ->target;
if (targ->channel != 0) {
target_offset += 8;
our_id = ahc->our_id_b;
}
tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
targ->target, &tstate);
ahc_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD,
channel, ROLE_INITIATOR);
ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
AHC_TRANS_GOAL, /*paused*/FALSE);
ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
AHC_TRANS_GOAL, /*paused*/FALSE);
ahc_update_neg_request(ahc, &devinfo, tstate, tinfo, AHC_NEG_ALWAYS);
ahc->platform_data->targets[target_offset] = NULL;
free(targ, M_DEVBUF);
}
static struct ahc_linux_device*
ahc_linux_alloc_device(struct ahc_softc *ahc,
struct ahc_linux_target *targ, u_int lun)
{
struct ahc_linux_device *dev;
dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT);
if (dev == NULL)
return (NULL);
memset(dev, 0, sizeof(*dev));
init_timer(&dev->timer);
TAILQ_INIT(&dev->busyq);
dev->flags = AHC_DEV_UNCONFIGURED;
dev->lun = lun;
dev->target = targ;
/*
* We start out life using untagged
* transactions of which we allow one.
*/
dev->openings = 1;
/*
* Set maxtags to 0. This will be changed if we
* later determine that we are dealing with
* a tagged queuing capable device.
*/
dev->maxtags = 0;
targ->refcount++;
targ->devices[lun] = dev;
return (dev);
}
static void
__ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
{
struct ahc_linux_target *targ;
targ = dev->target;
targ->devices[dev->lun] = NULL;
free(dev, M_DEVBUF);
targ->refcount--;
if (targ->refcount == 0)
ahc_linux_free_target(ahc, targ);
}
static void
ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
{
del_timer_sync(&dev->timer);
__ahc_linux_free_device(ahc, dev);
}
void
ahc_send_async(struct ahc_softc *ahc, char channel,
u_int target, u_int lun, ac_code code, void *arg)
{
switch (code) {
case AC_TRANSFER_NEG:
{
char buf[80];
struct ahc_linux_target *targ;
struct info_str info;
struct ahc_initiator_tinfo *tinfo;
struct ahc_tmode_tstate *tstate;
int target_offset;
info.buffer = buf;
info.length = sizeof(buf);
info.offset = 0;
info.pos = 0;
tinfo = ahc_fetch_transinfo(ahc, channel,
channel == 'A' ? ahc->our_id
: ahc->our_id_b,
target, &tstate);
/*
* Don't bother reporting results while
* negotiations are still pending.
*/
if (tinfo->curr.period != tinfo->goal.period
|| tinfo->curr.width != tinfo->goal.width
|| tinfo->curr.offset != tinfo->goal.offset
|| tinfo->curr.ppr_options != tinfo->goal.ppr_options)
if (bootverbose == 0)
break;
/*
* Don't bother reporting results that
* are identical to those last reported.
*/
target_offset = target;
if (channel == 'B')
target_offset += 8;
targ = ahc->platform_data->targets[target_offset];
if (targ == NULL)
break;
if (tinfo->curr.period == targ->last_tinfo.period
&& tinfo->curr.width == targ->last_tinfo.width
&& tinfo->curr.offset == targ->last_tinfo.offset
&& tinfo->curr.ppr_options == targ->last_tinfo.ppr_options)
if (bootverbose == 0)
break;
targ->last_tinfo.period = tinfo->curr.period;
targ->last_tinfo.width = tinfo->curr.width;
targ->last_tinfo.offset = tinfo->curr.offset;
targ->last_tinfo.ppr_options = tinfo->curr.ppr_options;
printf("(%s:%c:", ahc_name(ahc), channel);
if (target == CAM_TARGET_WILDCARD)
printf("*): ");
else
printf("%d): ", target);
ahc_format_transinfo(&info, &tinfo->curr);
if (info.pos < info.length)
*info.buffer = '\0';
else
buf[info.length - 1] = '\0';
printf("%s", buf);
break;
}
case AC_SENT_BDR:
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
WARN_ON(lun != CAM_LUN_WILDCARD);
scsi_report_device_reset(ahc->platform_data->host,
channel - 'A', target);
#else
Scsi_Device *scsi_dev;
/*
* Find the SCSI device associated with this
* request and indicate that a UA is expected.
*/
for (scsi_dev = ahc->platform_data->host->host_queue;
scsi_dev != NULL; scsi_dev = scsi_dev->next) {
if (channel - 'A' == scsi_dev->channel
&& target == scsi_dev->id
&& (lun == CAM_LUN_WILDCARD
|| lun == scsi_dev->lun)) {
scsi_dev->was_reset = 1;
scsi_dev->expecting_cc_ua = 1;
}
}
#endif
break;
}
case AC_BUS_RESET:
if (ahc->platform_data->host != NULL) {
scsi_report_bus_reset(ahc->platform_data->host,
channel - 'A');
}
break;
default:
panic("ahc_send_async: Unexpected async event");
}
}
/*
* Calls the higher level scsi done function and frees the scb.
*/
void
ahc_done(struct ahc_softc *ahc, struct scb *scb)
{
Scsi_Cmnd *cmd;
struct ahc_linux_device *dev;
LIST_REMOVE(scb, pending_links);
if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
struct scb_tailq *untagged_q;
int target_offset;
target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
untagged_q = &(ahc->untagged_queues[target_offset]);
TAILQ_REMOVE(untagged_q, scb, links.tqe);
ahc_run_untagged_queue(ahc, untagged_q);
}
if ((scb->flags & SCB_ACTIVE) == 0) {
printf("SCB %d done'd twice\n", scb->hscb->tag);
ahc_dump_card_state(ahc);
panic("Stopping for safety");
}
cmd = scb->io_ctx;
dev = scb->platform_data->dev;
dev->active--;
dev->openings++;
if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
cmd->result &= ~(CAM_DEV_QFRZN << 16);
dev->qfrozen--;
}
ahc_linux_unmap_scb(ahc, scb);
/*
* Guard against stale sense data.
* The Linux mid-layer assumes that sense
* was retrieved anytime the first byte of
* the sense buffer looks "sane".
*/
cmd->sense_buffer[0] = 0;
if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
uint32_t amount_xferred;
amount_xferred =
ahc_get_transfer_length(scb) - ahc_get_residual(scb);
if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
#ifdef AHC_DEBUG
if ((ahc_debug & AHC_SHOW_MISC) != 0) {
ahc_print_path(ahc, scb);
printf("Set CAM_UNCOR_PARITY\n");
}
#endif
ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
#ifdef AHC_REPORT_UNDERFLOWS
/*
* This code is disabled by default as some
* clients of the SCSI system do not properly
* initialize the underflow parameter. This
* results in spurious termination of commands
* that complete as expected (e.g. underflow is
* allowed as command can return variable amounts
* of data.
*/
} else if (amount_xferred < scb->io_ctx->underflow) {
u_int i;
ahc_print_path(ahc, scb);
printf("CDB:");
for (i = 0; i < scb->io_ctx->cmd_len; i++)
printf(" 0x%x", scb->io_ctx->cmnd[i]);
printf("\n");
ahc_print_path(ahc, scb);
printf("Saw underflow (%ld of %ld bytes). "
"Treated as error\n",
ahc_get_residual(scb),
ahc_get_transfer_length(scb));
ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
#endif
} else {
ahc_set_transaction_status(scb, CAM_REQ_CMP);
}
} else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
ahc_linux_handle_scsi_status(ahc, dev, scb);
} else if (ahc_get_transaction_status(scb) == CAM_SEL_TIMEOUT) {
dev->flags |= AHC_DEV_UNCONFIGURED;
}
if (dev->openings == 1
&& ahc_get_transaction_status(scb) == CAM_REQ_CMP
&& ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
dev->tag_success_count++;
/*
* Some devices deal with temporary internal resource
* shortages by returning queue full. When the queue
* full occurrs, we throttle back. Slowly try to get
* back to our previous queue depth.
*/
if ((dev->openings + dev->active) < dev->maxtags
&& dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
dev->tag_success_count = 0;
dev->openings++;
}
if (dev->active == 0)
dev->commands_since_idle_or_otag = 0;
if (TAILQ_EMPTY(&dev->busyq)) {
if ((dev->flags & AHC_DEV_UNCONFIGURED) != 0
&& dev->active == 0
&& (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0)
ahc_linux_free_device(ahc, dev);
} else if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) {
TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links);
dev->flags |= AHC_DEV_ON_RUN_LIST;
}
if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
printf("Recovery SCB completes\n");
if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
|| ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
up(&ahc->platform_data->eh_sem);
}
}
ahc_free_scb(ahc, scb);
ahc_linux_queue_cmd_complete(ahc, cmd);
}
static void
ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
struct ahc_linux_device *dev, struct scb *scb)
{
struct ahc_devinfo devinfo;
ahc_compile_devinfo(&devinfo,
ahc->our_id,
dev->target->target, dev->lun,
dev->target->channel == 0 ? 'A' : 'B',
ROLE_INITIATOR);
/*
* We don't currently trust the mid-layer to
* properly deal with queue full or busy. So,
* when one occurs, we tell the mid-layer to
* unconditionally requeue the command to us
* so that we can retry it ourselves. We also
* implement our own throttling mechanism so
* we don't clobber the device with too many
* commands.
*/
switch (ahc_get_scsi_status(scb)) {
default:
break;
case SCSI_STATUS_CHECK_COND:
case SCSI_STATUS_CMD_TERMINATED:
{
Scsi_Cmnd *cmd;
/*
* Copy sense information to the OS's cmd
* structure if it is available.
*/
cmd = scb->io_ctx;
if (scb->flags & SCB_SENSE) {
u_int sense_size;
sense_size = MIN(sizeof(struct scsi_sense_data)
- ahc_get_sense_residual(scb),
sizeof(cmd->sense_buffer));
memcpy(cmd->sense_buffer,
ahc_get_sense_buf(ahc, scb), sense_size);
if (sense_size < sizeof(cmd->sense_buffer))
memset(&cmd->sense_buffer[sense_size], 0,
sizeof(cmd->sense_buffer) - sense_size);
cmd->result |= (DRIVER_SENSE << 24);
#ifdef AHC_DEBUG
if (ahc_debug & AHC_SHOW_SENSE) {
int i;
printf("Copied %d bytes of sense data:",
sense_size);
for (i = 0; i < sense_size; i++) {
if ((i & 0xF) == 0)
printf("\n");
printf("0x%x ", cmd->sense_buffer[i]);
}
printf("\n");
}
#endif
}
break;
}
case SCSI_STATUS_QUEUE_FULL:
{
/*
* By the time the core driver has returned this
* command, all other commands that were queued
* to us but not the device have been returned.
* This ensures that dev->active is equal to
* the number of commands actually queued to
* the device.
*/
dev->tag_success_count = 0;
if (dev->active != 0) {
/*
* Drop our opening count to the number
* of commands currently outstanding.
*/
dev->openings = 0;
/*
ahc_print_path(ahc, scb);
printf("Dropping tag count to %d\n", dev->active);
*/
if (dev->active == dev->tags_on_last_queuefull) {
dev->last_queuefull_same_count++;
/*
* If we repeatedly see a queue full
* at the same queue depth, this
* device has a fixed number of tag
* slots. Lock in this tag depth
* so we stop seeing queue fulls from
* this device.
*/
if (dev->last_queuefull_same_count
== AHC_LOCK_TAGS_COUNT) {
dev->maxtags = dev->active;
ahc_print_path(ahc, scb);
printf("Locking max tag count at %d\n",
dev->active);
}
} else {
dev->tags_on_last_queuefull = dev->active;
dev->last_queuefull_same_count = 0;
}
ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
ahc_set_scsi_status(scb, SCSI_STATUS_OK);
ahc_platform_set_tags(ahc, &devinfo,
(dev->flags & AHC_DEV_Q_BASIC)
? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
break;
}
/*
* Drop down to a single opening, and treat this
* as if the target returned BUSY SCSI status.
*/
dev->openings = 1;
ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
ahc_platform_set_tags(ahc, &devinfo,
(dev->flags & AHC_DEV_Q_BASIC)
? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
/* FALLTHROUGH */
}
case SCSI_STATUS_BUSY:
{
/*
* Set a short timer to defer sending commands for
* a bit since Linux will not delay in this case.
*/
if ((dev->flags & AHC_DEV_TIMER_ACTIVE) != 0) {
printf("%s:%c:%d: Device Timer still active during "
"busy processing\n", ahc_name(ahc),
dev->target->channel, dev->target->target);
break;
}
dev->flags |= AHC_DEV_TIMER_ACTIVE;
dev->qfrozen++;
init_timer(&dev->timer);
dev->timer.data = (u_long)dev;
dev->timer.expires = jiffies + (HZ/2);
dev->timer.function = ahc_linux_dev_timed_unfreeze;
add_timer(&dev->timer);
break;
}
}
}
static void
ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, Scsi_Cmnd *cmd)
{
/*
* Typically, the complete queue has very few entries
* queued to it before the queue is emptied by
* ahc_linux_run_complete_queue, so sorting the entries
* by generation number should be inexpensive.
* We perform the sort so that commands that complete
* with an error are retuned in the order origionally
* queued to the controller so that any subsequent retries
* are performed in order. The underlying ahc routines do
* not guarantee the order that aborted commands will be
* returned to us.
*/
struct ahc_completeq *completeq;
struct ahc_cmd *list_cmd;
struct ahc_cmd *acmd;
/*
* Map CAM error codes into Linux Error codes. We
* avoid the conversion so that the DV code has the
* full error information available when making
* state change decisions.
*/
{
u_int new_status;
switch (ahc_cmd_get_transaction_status(cmd)) {
case CAM_REQ_INPROG:
case CAM_REQ_CMP:
case CAM_SCSI_STATUS_ERROR:
new_status = DID_OK;
break;
case CAM_REQ_ABORTED:
new_status = DID_ABORT;
break;
case CAM_BUSY:
new_status = DID_BUS_BUSY;
break;
case CAM_REQ_INVALID:
case CAM_PATH_INVALID:
new_status = DID_BAD_TARGET;
break;
case CAM_SEL_TIMEOUT:
new_status = DID_NO_CONNECT;
break;
case CAM_SCSI_BUS_RESET:
case CAM_BDR_SENT:
new_status = DID_RESET;
break;
case CAM_UNCOR_PARITY:
new_status = DID_PARITY;
break;
case CAM_CMD_TIMEOUT:
new_status = DID_TIME_OUT;
break;
case CAM_UA_ABORT:
case CAM_REQ_CMP_ERR:
case CAM_AUTOSENSE_FAIL:
case CAM_NO_HBA:
case CAM_DATA_RUN_ERR:
case CAM_UNEXP_BUSFREE:
case CAM_SEQUENCE_FAIL:
case CAM_CCB_LEN_ERR:
case CAM_PROVIDE_FAIL:
case CAM_REQ_TERMIO:
case CAM_UNREC_HBA_ERROR:
case CAM_REQ_TOO_BIG:
new_status = DID_ERROR;
break;
case CAM_REQUEUE_REQ:
/*
* If we want the request requeued, make sure there
* are sufficent retries. In the old scsi error code,
* we used to be able to specify a result code that
* bypassed the retry count. Now we must use this
* hack. We also "fake" a check condition with
* a sense code of ABORTED COMMAND. This seems to
* evoke a retry even if this command is being sent
* via the eh thread. Ick! Ick! Ick!
*/
if (cmd->retries > 0)
cmd->retries--;
new_status = DID_OK;
ahc_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND);
cmd->result |= (DRIVER_SENSE << 24);
memset(cmd->sense_buffer, 0,
sizeof(cmd->sense_buffer));
cmd->sense_buffer[0] = SSD_ERRCODE_VALID
| SSD_CURRENT_ERROR;
cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND;
break;
default:
/* We should never get here */
new_status = DID_ERROR;
break;
}
ahc_cmd_set_transaction_status(cmd, new_status);
}
completeq = &ahc->platform_data->completeq;
list_cmd = TAILQ_FIRST(completeq);
acmd = (struct ahc_cmd *)cmd;
while (list_cmd != NULL
&& acmd_scsi_cmd(list_cmd).serial_number
< acmd_scsi_cmd(acmd).serial_number)
list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
if (list_cmd != NULL)
TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
else
TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
}
static void
ahc_linux_sem_timeout(u_long arg)
{
struct ahc_softc *ahc;
u_long s;
ahc = (struct ahc_softc *)arg;
ahc_lock(ahc, &s);
if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
up(&ahc->platform_data->eh_sem);
}
ahc_unlock(ahc, &s);
}
static void
ahc_linux_freeze_simq(struct ahc_softc *ahc)
{
ahc->platform_data->qfrozen++;
if (ahc->platform_data->qfrozen == 1) {
scsi_block_requests(ahc->platform_data->host);
/* XXX What about Twin channels? */
ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
CAM_LUN_WILDCARD, SCB_LIST_NULL,
ROLE_INITIATOR, CAM_REQUEUE_REQ);
}
}
static void
ahc_linux_release_simq(u_long arg)
{
struct ahc_softc *ahc;
u_long s;
int unblock_reqs;
ahc = (struct ahc_softc *)arg;
unblock_reqs = 0;
ahc_lock(ahc, &s);
if (ahc->platform_data->qfrozen > 0)
ahc->platform_data->qfrozen--;
if (ahc->platform_data->qfrozen == 0)
unblock_reqs = 1;
ahc_schedule_runq(ahc);
ahc_unlock(ahc, &s);
/*
* There is still a race here. The mid-layer
* should keep its own freeze count and use
* a bottom half handler to run the queues
* so we can unblock with our own lock held.
*/
if (unblock_reqs)
scsi_unblock_requests(ahc->platform_data->host);
}
static void
ahc_linux_dev_timed_unfreeze(u_long arg)
{
struct ahc_linux_device *dev;
struct ahc_softc *ahc;
u_long s;
dev = (struct ahc_linux_device *)arg;
ahc = dev->target->ahc;
ahc_lock(ahc, &s);
dev->flags &= ~AHC_DEV_TIMER_ACTIVE;
if (dev->qfrozen > 0)
dev->qfrozen--;
if (dev->qfrozen == 0
&& (dev->flags & AHC_DEV_ON_RUN_LIST) == 0)
ahc_linux_run_device_queue(ahc, dev);
if (TAILQ_EMPTY(&dev->busyq)
&& dev->active == 0)
__ahc_linux_free_device(ahc, dev);
ahc_unlock(ahc, &s);
}
static int
ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag)
{
struct ahc_softc *ahc;
struct ahc_cmd *acmd;
struct ahc_cmd *list_acmd;
struct ahc_linux_device *dev;
struct scb *pending_scb;
u_long s;
u_int saved_scbptr;
u_int active_scb_index;
u_int last_phase;
u_int saved_scsiid;
u_int cdb_byte;
int retval;
int was_paused;
int paused;
int wait;
int disconnected;
pending_scb = NULL;
paused = FALSE;
wait = FALSE;
ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
acmd = (struct ahc_cmd *)cmd;
printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
ahc_name(ahc), cmd->device->channel,
cmd->device->id, cmd->device->lun,
flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
printf("CDB:");
for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
printf(" 0x%x", cmd->cmnd[cdb_byte]);
printf("\n");
/*
* In all versions of Linux, we have to work around
* a major flaw in how the mid-layer is locked down
* if we are to sleep successfully in our error handler
* while allowing our interrupt handler to run. Since
* the midlayer acquires either the io_request_lock or
* our lock prior to calling us, we must use the
* spin_unlock_irq() method for unlocking our lock.
* This will force interrupts to be enabled on the
* current CPU. Since the EH thread should not have
* been running with CPU interrupts disabled other than
* by acquiring either the io_request_lock or our own
* lock, this *should* be safe.
*/
ahc_midlayer_entrypoint_lock(ahc, &s);
/*
* First determine if we currently own this command.
* Start by searching the device queue. If not found
* there, check the pending_scb list. If not found
* at all, and the system wanted us to just abort the
* command, return success.
*/
dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id,
cmd->device->lun, /*alloc*/FALSE);
if (dev == NULL) {
/*
* No target device for this command exists,
* so we must not still own the command.
*/
printf("%s:%d:%d:%d: Is not an active device\n",
ahc_name(ahc), cmd->device->channel, cmd->device->id,
cmd->device->lun);
retval = SUCCESS;
goto no_cmd;
}
TAILQ_FOREACH(list_acmd, &dev->busyq, acmd_links.tqe) {
if (list_acmd == acmd)
break;
}
if (list_acmd != NULL) {
printf("%s:%d:%d:%d: Command found on device queue\n",
ahc_name(ahc), cmd->device->channel, cmd->device->id,
cmd->device->lun);
if (flag == SCB_ABORT) {
TAILQ_REMOVE(&dev->busyq, list_acmd, acmd_links.tqe);
cmd->result = DID_ABORT << 16;
ahc_linux_queue_cmd_complete(ahc, cmd);
retval = SUCCESS;
goto done;
}
}
if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
&& ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
cmd->device->channel + 'A',
cmd->device->lun,
CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
printf("%s:%d:%d:%d: Command found on untagged queue\n",
ahc_name(ahc), cmd->device->channel, cmd->device->id,
cmd->device->lun);
retval = SUCCESS;
goto done;
}
/*
* See if we can find a matching cmd in the pending list.
*/
LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
if (pending_scb->io_ctx == cmd)
break;
}
if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
/* Any SCB for this device will do for a target reset */
LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
if (ahc_match_scb(ahc, pending_scb, cmd->device->id,
cmd->device->channel + 'A',
CAM_LUN_WILDCARD,
SCB_LIST_NULL, ROLE_INITIATOR) == 0)
break;
}
}
if (pending_scb == NULL) {
printf("%s:%d:%d:%d: Command not found\n",
ahc_name(ahc), cmd->device->channel, cmd->device->id,
cmd->device->lun);
goto no_cmd;
}
if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
/*
* We can't queue two recovery actions using the same SCB
*/
retval = FAILED;
goto done;
}
/*
* Ensure that the card doesn't do anything
* behind our back and that we didn't "just" miss
* an interrupt that would affect this cmd.
*/
was_paused = ahc_is_paused(ahc);
ahc_pause_and_flushwork(ahc);
paused = TRUE;
if ((pending_scb->flags & SCB_ACTIVE) == 0) {
printf("%s:%d:%d:%d: Command already completed\n",
ahc_name(ahc), cmd->device->channel, cmd->device->id,
cmd->device->lun);
goto no_cmd;
}
printf("%s: At time of recovery, card was %spaused\n",
ahc_name(ahc), was_paused ? "" : "not ");
ahc_dump_card_state(ahc);
disconnected = TRUE;
if (flag == SCB_ABORT) {
if (ahc_search_qinfifo(ahc, cmd->device->id,
cmd->device->channel + 'A',
cmd->device->lun,
pending_scb->hscb->tag,
ROLE_INITIATOR, CAM_REQ_ABORTED,
SEARCH_COMPLETE) > 0) {
printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
ahc_name(ahc), cmd->device->channel,
cmd->device->id, cmd->device->lun);
retval = SUCCESS;
goto done;
}
} else if (ahc_search_qinfifo(ahc, cmd->device->id,
cmd->device->channel + 'A',
cmd->device->lun, pending_scb->hscb->tag,
ROLE_INITIATOR, /*status*/0,
SEARCH_COUNT) > 0) {
disconnected = FALSE;
}
if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
struct scb *bus_scb;
bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
if (bus_scb == pending_scb)
disconnected = FALSE;
else if (flag != SCB_ABORT
&& ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
&& ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
disconnected = FALSE;
}
/*
* At this point, pending_scb is the scb associated with the
* passed in command. That command is currently active on the
* bus, is in the disconnected state, or we're hoping to find
* a command for the same target active on the bus to abuse to
* send a BDR. Queue the appropriate message based on which of
* these states we are in.
*/
last_phase = ahc_inb(ahc, LASTPHASE);
saved_scbptr = ahc_inb(ahc, SCBPTR);
active_scb_index = ahc_inb(ahc, SCB_TAG);
saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
if (last_phase != P_BUSFREE
&& (pending_scb->hscb->tag == active_scb_index
|| (flag == SCB_DEVICE_RESET
&& SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) {
/*
* We're active on the bus, so assert ATN
* and hope that the target responds.
*/
pending_scb = ahc_lookup_scb(ahc, active_scb_index);
pending_scb->flags |= SCB_RECOVERY_SCB|flag;
ahc_outb(ahc, MSG_OUT, HOST_MSG);
ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
ahc_name(ahc), cmd->device->channel, cmd->device->id,
cmd->device->lun);
wait = TRUE;
} else if (disconnected) {
/*
* Actually re-queue this SCB in an attempt
* to select the device before it reconnects.
* In either case (selection or reselection),
* we will now issue the approprate message
* to the timed-out device.
*
* Set the MK_MESSAGE control bit indicating
* that we desire to send a message. We
* also set the disconnected flag since
* in the paging case there is no guarantee
* that our SCB control byte matches the
* version on the card. We don't want the
* sequencer to abort the command thinking
* an unsolicited reselection occurred.
*/
pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
pending_scb->flags |= SCB_RECOVERY_SCB|flag;
/*
* Remove any cached copy of this SCB in the
* disconnected list in preparation for the
* queuing of our abort SCB. We use the
* same element in the SCB, SCB_NEXT, for
* both the qinfifo and the disconnected list.
*/
ahc_search_disc_list(ahc, cmd->device->id,
cmd->device->channel + 'A',
cmd->device->lun, pending_scb->hscb->tag,
/*stop_on_first*/TRUE,
/*remove*/TRUE,
/*save_state*/FALSE);
/*
* In the non-paging case, the sequencer will
* never re-reference the in-core SCB.
* To make sure we are notified during
* reslection, set the MK_MESSAGE flag in
* the card's copy of the SCB.
*/
if ((ahc->flags & AHC_PAGESCBS) == 0) {
ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
ahc_outb(ahc, SCB_CONTROL,
ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
}
/*
* Clear out any entries in the QINFIFO first
* so we are the next SCB for this target
* to run.
*/
ahc_search_qinfifo(ahc, cmd->device->id,
cmd->device->channel + 'A',
cmd->device->lun, SCB_LIST_NULL,
ROLE_INITIATOR, CAM_REQUEUE_REQ,
SEARCH_COMPLETE);
ahc_qinfifo_requeue_tail(ahc, pending_scb);
ahc_outb(ahc, SCBPTR, saved_scbptr);
ahc_print_path(ahc, pending_scb);
printf("Device is disconnected, re-queuing SCB\n");
wait = TRUE;
} else {
printf("%s:%d:%d:%d: Unable to deliver message\n",
ahc_name(ahc), cmd->device->channel, cmd->device->id,
cmd->device->lun);
retval = FAILED;
goto done;
}
no_cmd:
/*
* Our assumption is that if we don't have the command, no
* recovery action was required, so we return success. Again,
* the semantics of the mid-layer recovery engine are not
* well defined, so this may change in time.
*/
retval = SUCCESS;
done:
if (paused)
ahc_unpause(ahc);
if (wait) {
struct timer_list timer;
int ret;
ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE;
spin_unlock_irq(&ahc->platform_data->spin_lock);
init_timer(&timer);
timer.data = (u_long)ahc;
timer.expires = jiffies + (5 * HZ);
timer.function = ahc_linux_sem_timeout;
add_timer(&timer);
printf("Recovery code sleeping\n");
down(&ahc->platform_data->eh_sem);
printf("Recovery code awake\n");
ret = del_timer_sync(&timer);
if (ret == 0) {
printf("Timer Expired\n");
retval = FAILED;
}
spin_lock_irq(&ahc->platform_data->spin_lock);
}
ahc_schedule_runq(ahc);
ahc_linux_run_complete_queue(ahc);
ahc_midlayer_entrypoint_unlock(ahc, &s);
return (retval);
}
void
ahc_platform_dump_card_state(struct ahc_softc *ahc)
{
struct ahc_linux_device *dev;
int channel;
int maxchannel;
int target;
int maxtarget;
int lun;
int i;
maxchannel = (ahc->features & AHC_TWIN) ? 1 : 0;
maxtarget = (ahc->features & AHC_WIDE) ? 15 : 7;
for (channel = 0; channel <= maxchannel; channel++) {
for (target = 0; target <=maxtarget; target++) {
for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
struct ahc_cmd *acmd;
dev = ahc_linux_get_device(ahc, channel, target,
lun, /*alloc*/FALSE);
if (dev == NULL)
continue;
printf("DevQ(%d:%d:%d): ",
channel, target, lun);
i = 0;
TAILQ_FOREACH(acmd, &dev->busyq,
acmd_links.tqe) {
if (i++ > AHC_SCB_MAX)
break;
}
printf("%d waiting\n", i);
}
}
}
}
static void ahc_linux_exit(void);
static void ahc_linux_get_width(struct scsi_target *starget)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
struct ahc_tmode_tstate *tstate;
struct ahc_initiator_tinfo *tinfo
= ahc_fetch_transinfo(ahc,
starget->channel + 'A',
shost->this_id, starget->id, &tstate);
spi_width(starget) = tinfo->curr.width;
}
static void ahc_linux_set_width(struct scsi_target *starget, int width)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
struct ahc_devinfo devinfo;
unsigned long flags;
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
starget->channel + 'A', ROLE_INITIATOR);
ahc_lock(ahc, &flags);
ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
ahc_unlock(ahc, &flags);
}
static void ahc_linux_get_period(struct scsi_target *starget)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
struct ahc_tmode_tstate *tstate;
struct ahc_initiator_tinfo *tinfo
= ahc_fetch_transinfo(ahc,
starget->channel + 'A',
shost->this_id, starget->id, &tstate);
spi_period(starget) = tinfo->curr.period;
}
static void ahc_linux_set_period(struct scsi_target *starget, int period)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
struct ahc_tmode_tstate *tstate;
struct ahc_initiator_tinfo *tinfo
= ahc_fetch_transinfo(ahc,
starget->channel + 'A',
shost->this_id, starget->id, &tstate);
struct ahc_devinfo devinfo;
unsigned int ppr_options = tinfo->curr.ppr_options;
unsigned long flags;
unsigned long offset = tinfo->curr.offset;
struct ahc_syncrate *syncrate;
if (offset == 0)
offset = MAX_OFFSET;
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
starget->channel + 'A', ROLE_INITIATOR);
/* all PPR requests apart from QAS require wide transfers */
if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
ahc_linux_get_width(starget);
if (spi_width(starget) == 0)
ppr_options &= MSG_EXT_PPR_QAS_REQ;
}
syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
ahc_lock(ahc, &flags);
ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
ppr_options, AHC_TRANS_GOAL, FALSE);
ahc_unlock(ahc, &flags);
}
static void ahc_linux_get_offset(struct scsi_target *starget)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
struct ahc_tmode_tstate *tstate;
struct ahc_initiator_tinfo *tinfo
= ahc_fetch_transinfo(ahc,
starget->channel + 'A',
shost->this_id, starget->id, &tstate);
spi_offset(starget) = tinfo->curr.offset;
}
static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
struct ahc_tmode_tstate *tstate;
struct ahc_initiator_tinfo *tinfo
= ahc_fetch_transinfo(ahc,
starget->channel + 'A',
shost->this_id, starget->id, &tstate);
struct ahc_devinfo devinfo;
unsigned int ppr_options = 0;
unsigned int period = 0;
unsigned long flags;
struct ahc_syncrate *syncrate = NULL;
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
starget->channel + 'A', ROLE_INITIATOR);
if (offset != 0) {
syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
period = tinfo->curr.period;
ppr_options = tinfo->curr.ppr_options;
}
ahc_lock(ahc, &flags);
ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
ppr_options, AHC_TRANS_GOAL, FALSE);
ahc_unlock(ahc, &flags);
}
static void ahc_linux_get_dt(struct scsi_target *starget)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
struct ahc_tmode_tstate *tstate;
struct ahc_initiator_tinfo *tinfo
= ahc_fetch_transinfo(ahc,
starget->channel + 'A',
shost->this_id, starget->id, &tstate);
spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ;
}
static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
struct ahc_tmode_tstate *tstate;
struct ahc_initiator_tinfo *tinfo
= ahc_fetch_transinfo(ahc,
starget->channel + 'A',
shost->this_id, starget->id, &tstate);
struct ahc_devinfo devinfo;
unsigned int ppr_options = tinfo->curr.ppr_options
& ~MSG_EXT_PPR_DT_REQ;
unsigned int period = tinfo->curr.period;
unsigned long flags;
struct ahc_syncrate *syncrate;
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
starget->channel + 'A', ROLE_INITIATOR);
syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
ahc_lock(ahc, &flags);
ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
ppr_options, AHC_TRANS_GOAL, FALSE);
ahc_unlock(ahc, &flags);
}
static void ahc_linux_get_qas(struct scsi_target *starget)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
struct ahc_tmode_tstate *tstate;
struct ahc_initiator_tinfo *tinfo
= ahc_fetch_transinfo(ahc,
starget->channel + 'A',
shost->this_id, starget->id, &tstate);
spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ;
}
static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
struct ahc_tmode_tstate *tstate;
struct ahc_initiator_tinfo *tinfo
= ahc_fetch_transinfo(ahc,
starget->channel + 'A',
shost->this_id, starget->id, &tstate);
struct ahc_devinfo devinfo;
unsigned int ppr_options = tinfo->curr.ppr_options
& ~MSG_EXT_PPR_QAS_REQ;
unsigned int period = tinfo->curr.period;
unsigned long flags;
struct ahc_syncrate *syncrate;
if (qas)
ppr_options |= MSG_EXT_PPR_QAS_REQ;
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
starget->channel + 'A', ROLE_INITIATOR);
syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
ahc_lock(ahc, &flags);
ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
ppr_options, AHC_TRANS_GOAL, FALSE);
ahc_unlock(ahc, &flags);
}
static void ahc_linux_get_iu(struct scsi_target *starget)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
struct ahc_tmode_tstate *tstate;
struct ahc_initiator_tinfo *tinfo
= ahc_fetch_transinfo(ahc,
starget->channel + 'A',
shost->this_id, starget->id, &tstate);
spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ;
}
static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
struct ahc_tmode_tstate *tstate;
struct ahc_initiator_tinfo *tinfo
= ahc_fetch_transinfo(ahc,
starget->channel + 'A',
shost->this_id, starget->id, &tstate);
struct ahc_devinfo devinfo;
unsigned int ppr_options = tinfo->curr.ppr_options
& ~MSG_EXT_PPR_IU_REQ;
unsigned int period = tinfo->curr.period;
unsigned long flags;
struct ahc_syncrate *syncrate;
if (iu)
ppr_options |= MSG_EXT_PPR_IU_REQ;
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
starget->channel + 'A', ROLE_INITIATOR);
syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
ahc_lock(ahc, &flags);
ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
ppr_options, AHC_TRANS_GOAL, FALSE);
ahc_unlock(ahc, &flags);
}
static struct spi_function_template ahc_linux_transport_functions = {
.get_offset = ahc_linux_get_offset,
.set_offset = ahc_linux_set_offset,
.show_offset = 1,
.get_period = ahc_linux_get_period,
.set_period = ahc_linux_set_period,
.show_period = 1,
.get_width = ahc_linux_get_width,
.set_width = ahc_linux_set_width,
.show_width = 1,
.get_dt = ahc_linux_get_dt,
.set_dt = ahc_linux_set_dt,
.show_dt = 1,
.get_iu = ahc_linux_get_iu,
.set_iu = ahc_linux_set_iu,
.show_iu = 1,
.get_qas = ahc_linux_get_qas,
.set_qas = ahc_linux_set_qas,
.show_qas = 1,
};
static int __init
ahc_linux_init(void)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
ahc_linux_transport_template = spi_attach_transport(&ahc_linux_transport_functions);
if (!ahc_linux_transport_template)
return -ENODEV;
if (ahc_linux_detect(&aic7xxx_driver_template))
return 0;
spi_release_transport(ahc_linux_transport_template);
ahc_linux_exit();
return -ENODEV;
#else
scsi_register_module(MODULE_SCSI_HA, &aic7xxx_driver_template);
if (aic7xxx_driver_template.present == 0) {
scsi_unregister_module(MODULE_SCSI_HA,
&aic7xxx_driver_template);
return (-ENODEV);
}
return (0);
#endif
}
static void
ahc_linux_exit(void)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
/*
* In 2.4 we have to unregister from the PCI core _after_
* unregistering from the scsi midlayer to avoid dangling
* references.
*/
scsi_unregister_module(MODULE_SCSI_HA, &aic7xxx_driver_template);
#endif
ahc_linux_pci_exit();
ahc_linux_eisa_exit();
spi_release_transport(ahc_linux_transport_template);
}
module_init(ahc_linux_init);
module_exit(ahc_linux_exit);
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