sbp2.c
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上传日期:2013-04-10
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- /*
- * sbp2.c - SBP-2 protocol driver for IEEE-1394
- *
- * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
- * jamesg@filanet.com (JSG)
- *
- * 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 of the License, 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; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- /*
- * Brief Description:
- *
- * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394
- * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level
- * driver. It also registers as a SCSI lower-level driver in order to accept
- * SCSI commands for transport using SBP-2.
- *
- *
- * Driver Loading:
- *
- * Currently, the SBP-2 driver is supported only as a module. Because the
- * Linux SCSI stack is not Plug-N-Play aware, module load order is
- * important. Assuming the SCSI core drivers are either built into the
- * kernel or already loaded as modules, you should load the IEEE-1394 modules
- * in the following order:
- *
- * ieee1394 (e.g. insmod ieee1394)
- * ohci1394 (e.g. insmod ohci1394)
- * sbp2 (e.g. insmod sbp2)
- *
- * The SBP-2 driver will attempt to discover any attached SBP-2 devices when first
- * loaded, or after any IEEE-1394 bus reset (e.g. a hot-plug). It will then print
- * out a debug message indicating if it was able to discover a SBP-2 device.
- *
- * Currently, the SBP-2 driver will catch any attached SBP-2 devices during the
- * initial scsi bus scan (when the driver is first loaded). To add or remove
- * SBP-2 devices "after" this initial scan (i.e. if you plug-in or un-plug a
- * device after the SBP-2 driver is loaded), you must either use the scsi procfs
- * add-single-device, remove-single-device, or a shell script such as
- * rescan-scsi-bus.sh.
- *
- * The easiest way to add/detect new SBP-2 devices is to run the shell script
- * rescan-scsi-bus.sh (or re-load the SBP-2 driver). This script may be
- * found at:
- * http://www.garloff.de/kurt/linux/rescan-scsi-bus.sh
- *
- * As an alternative, you may manually add/remove SBP-2 devices via the procfs with
- * add-single-device <h> <b> <t> <l> or remove-single-device <h> <b> <t> <l>, where:
- * <h> = host (starting at zero for first SCSI adapter)
- * <b> = bus (normally zero)
- * <t> = target (starting at zero for first SBP-2 device)
- * <l> = lun (normally zero)
- *
- * e.g. To manually add/detect a new SBP-2 device
- * echo "scsi add-single-device 0 0 0 0" > /proc/scsi/scsi
- *
- * e.g. To manually remove a SBP-2 device after it's been unplugged
- * echo "scsi remove-single-device 0 0 0 0" > /proc/scsi/scsi
- *
- * e.g. To check to see which SBP-2/SCSI devices are currently registered
- * cat /proc/scsi/scsi
- *
- * After scanning for new SCSI devices (above), you may access any attached
- * SBP-2 storage devices as if they were SCSI devices (e.g. mount /dev/sda1,
- * fdisk, mkfs, etc.).
- *
- *
- * Module Load Options:
- *
- * sbp2_max_speed - Force max speed allowed
- * (2 = 400mb, 1 = 200mb, 0 = 100mb. default = 2)
- * sbp2_serialize_io - Serialize all I/O coming down from the scsi drivers
- * (0 = deserialized, 1 = serialized, default = 0)
- * sbp2_max_sectors, - Change max sectors per I/O supported (default = 255)
- * sbp2_max_outstanding_cmds - Change max outstanding concurrent commands (default = 8)
- * sbp2_max_cmds_per_lun - Change max concurrent commands per sbp2 device (default = 1)
- * sbp2_exclusive_login - Set to zero if you'd like to allow multiple hosts the ability
- * to log in at the same time. Sbp2 device must support this,
- * and you must know what you're doing (default = 1)
- *
- * (e.g. insmod sbp2 sbp2_serialize_io = 1)
- *
- *
- * Current Support:
- *
- * The SBP-2 driver is still in an early state, but supports a variety of devices.
- * I have read/written many gigabytes of data from/to SBP-2 drives, and have seen
- * performance of more than 25 MBytes/s on individual drives (limit of the media
- * transfer rate).
- *
- *
- * Following are a sampling of devices that have been tested successfully:
- *
- * - Western Digital IEEE-1394 hard drives
- * - Maxtor IEEE-1394 hard drives
- * - VST (SmartDisk) IEEE-1394 hard drives and Zip drives (several flavors)
- * - LaCie IEEE-1394 hard drives (several flavors)
- * - QPS IEEE-1394 CD-RW/DVD drives and hard drives
- * - BusLink IEEE-1394 hard drives
- * - Iomega IEEE-1394 Zip/Jazz/Peerless drives
- * - ClubMac IEEE-1394 hard drives
- * - FirePower IEEE-1394 hard drives
- * - EzQuest IEEE-1394 hard drives and CD-RW drives
- * - Castlewood/ADS IEEE-1394 ORB drives
- * - Evergreen IEEE-1394 hard drives and CD-RW drives
- * - Addonics IEEE-1394 CD-RW drives
- * - Bellstor IEEE-1394 hard drives and CD-RW drives
- * - APDrives IEEE-1394 hard drives
- * - Fujitsu IEEE-1394 MO drives
- * - Sony IEEE-1394 CD-RW drives
- * - Epson IEEE-1394 scanners
- * - ADS IEEE-1394 memory stick and compact flash readers
- * - SBP-2 bridge-based devices (LSI, Oxford Semiconductor, Indigita bridges)
- * - Various other standard IEEE-1394 hard drives and enclosures
- *
- *
- * Performance Issues:
- *
- * - Make sure you are "not" running fat/fat32 on your attached SBP-2 drives. You'll
- * get much better performance formatting the drive ext2 (but you will lose the
- * ability to easily move the drive between Windows/Linux).
- *
- *
- * Current Issues:
- *
- * - Error Handling: SCSI aborts and bus reset requests are handled somewhat
- * but the code needs additional debugging.
- *
- * - Module: The SBP-2 driver is currently only supported as a module. It would not take
- * much work to allow it to be compiled into the kernel, but you'd have to
- * add some init code to the kernel to support this... and modules are much
- * more flexible anyway. ;-)
- *
- * - Hot-plugging: Interaction with the SCSI stack and support for hot-plugging could
- * stand some improvement.
- *
- *
- * History:
- *
- * 07/25/00 - Initial revision (JSG)
- * 08/11/00 - Following changes/bug fixes were made (JSG):
- * * Bug fix to SCSI procfs code (still needs to be synched with 2.4 kernel).
- * * Bug fix where request sense commands were actually sent on the bus.
- * * Changed bus reset/abort code to deal with devices that spin up quite
- * slowly (which result in SCSI time-outs).
- * * "More" properly pull information from device's config rom, for enumeration
- * of SBP-2 devices, and determining SBP-2 register offsets.
- * * Change Simplified Direct Access Device type to Direct Access Device type in
- * returned inquiry data, in order to make the SCSI stack happy.
- * * Modified driver to register with the SCSI stack "before" enumerating any attached
- * SBP-2 devices. This means that you'll have to use procfs scsi-add-device or
- * some sort of script to discover new SBP-2 devices.
- * * Minor re-write of some code and other minor changes.
- * 08/28/00 - Following changes/bug fixes were made (JSG):
- * * Bug fixes to scatter/gather support (case of one s/g element)
- * * Updated direction table for scsi commands (mostly DVD commands)
- * * Retries when trying to detect SBP-2 devices (for slow devices)
- * * Slightly better error handling (previously none) when commands time-out.
- * * Misc. other bug fixes and code reorganization.
- * 09/13/00 - Following changes/bug fixes were made (JSG)
- * * Moved detection/enumeration code to a kernel thread which is woken up when IEEE-1394
- * bus resets occur.
- * * Added code to handle bus resets and hot-plugging while devices are mounted, but full
- * hot-plug support is not quite there yet.
- * * Now use speed map to determine speed and max payload sizes for ORBs
- * * Clean-up of code and reorganization
- * 09/19/00 - Added better hot-plug support and other minor changes (JSG)
- * 10/15/00 - Fixes for latest 2.4.0 test kernel, minor fix for hot-plug race. (JSG)
- * 12/03/00 - Created pool of request packet structures for use in sending out sbp2 command
- * and agent reset requests. This removes the kmallocs/kfrees in the critical I/O paths,
- * and also deals with some subtle race conditions related to allocating and freeing
- * packets. (JSG)
- * 12/09/00 - Improved the sbp2 device detection by actually reading the root and unit
- * directory (khk@khk.net)
- * 12/23/00 - Following changes/enhancements were made (JSG)
- * * Only do SCSI to RBC command conversion for Direct Access and Simplified
- * Direct Access Devices (this is pulled from the config rom root directory).
- * This is needed because doing the conversion for all device types broke the
- * Epson scanner. Still looking for a better way of determining when to convert
- * commands (for RBC devices). Thanks to khk for helping on this!
- * * Added ability to "emulate" physical dma support, for host adapters such as TILynx.
- * * Determine max payload and speed by also looking at the host adapter's max_rec field.
- * 01/19/01 - Added checks to sbp2 login and made the login time-out longer. Also fixed a compile
- * problem for 2.4.0. (JSG)
- * 01/24/01 - Fixed problem when individual s/g elements are 64KB or larger. Needed to break
- * up these larger elements, since the sbp2 page table element size is only 16 bits. (JSG)
- * 01/29/01 - Minor byteswap fix for login response (used for reconnect and log out).
- * 03/07/01 - Following changes/enhancements were made (JSG)
- * * Changes to allow us to catch the initial scsi bus scan (for detecting sbp2
- * devices when first loading sbp2.o). To disable this, un-define
- * SBP2_SUPPORT_INITIAL_BUS_SCAN.
- * * Temporary fix to deal with many sbp2 devices that do not support individual
- * transfers of greater than 128KB in size.
- * * Mode sense conversion from 6 byte to 10 byte versions for CDRW/DVD devices. (Mark Burton)
- * * Define allowing support for goofy sbp2 devices that do not support mode
- * sense command at all, allowing them to be mounted rw (such as 1394 memory
- * stick and compact flash readers). Define SBP2_MODE_SENSE_WRITE_PROTECT_HACK
- * if you need this fix.
- * 03/29/01 - Major performance enhancements and misc. other changes. Thanks to Daniel Berlin for many of
- * changes and suggestions for change:
- * * Now use sbp2 doorbell and link commands on the fly (instead of serializing requests)
- * * Removed all bit fields in an attempt to run on PPC machines (still needs a little more work)
- * * Added large request break-up/linking support for sbp2 chipsets that do not support transfers
- * greater than 128KB in size.
- * * Bumped up max commands per lun to two, and max total outstanding commands to eight.
- * 04/03/01 - Minor clean-up. Write orb pointer directly if no outstanding commands (saves one 1394 bus
- * transaction). Added module load options (bus scan, mode sense hack, max speed, serialize_io,
- * no_large_transfers). Better bus reset handling while I/O pending. Set serialize_io to 1 by
- * default (debugging of deserialized I/O in progress).
- * 04/04/01 - Added workaround for PPC Pismo firewire chipset. See #define below. (Daniel Berlin)
- * 04/20/01 - Minor clean-up. Allocate more orb structures when running with sbp2 target chipsets with
- * 128KB max transfer limit.
- * 06/16/01 - Converted DMA interfaces to pci_dma - Ben Collins
- * <bcollins@debian.org
- * 07/22/01 - Use NodeMngr to get info about the local host and
- * attached devices. Ben Collins
- *
- * 09/15/01 - Remove detection code, instead subscribe to the nodemgr
- * driver management interface. This also removes the
- * initial bus scan stuff since the nodemgr calls
- * sbp2_probe for each sbp2 device already on the bus,
- * when we register our driver. This change
- * automtically adds hotplug support to the driver.
- * Kristian Hogsberg <hogsberg@users.sf.net>
- *
- * 11/17/01 - Various bugfixes/cleanups:
- * * Remember to logout of device in sbp2_disconnect.
- * * If we fail to reconnect to a device after bus reset
- * remember to release unit directory, so the ieee1394
- * knows we no longer manage it.
- * * Unregister scsi hosts in sbp2_remove_host when a
- * hpsb_host goes away.
- * * Remove stupid hack in sbp2_remove_host.
- * * Switched to "manual" module initialization
- * (i.e. not scsi_module.c) and moved sbp2_cleanup
- * moved sbp2scsi_release to sbp2_module_ext. The
- * release function is called once pr. registered
- * scsi host, but sbp2_cleanup should only be called
- * upon module unload. Moved much initialization
- * from sbp2scsi_detect to sbp2_module_init.
- * Kristian Hogsberg <hogsberg@users.sf.net>
- * 01/06/02 - Misc bug fixes/enhancements: (JSG)
- * * Enable use_new_eh_code for scsi stuff.
- * * Do not write all ones for NULL ORB high/low fields, but
- * rather leave reserved areas zeroed (per SBP2 spec).
- * * Use newer scsi transfer direction passed down instead of our
- * direction table.
- * * Bumped login time-out to 20 seconds, as some devices are slow.
- * * Fixed a couple scsi unregister bugs on module unload
- * 01/13/02 - Fixed compatibility with certain SBP2 devices, such as Iomega
- * 1394 devices (Peerless, Jazz). Also a bit of clean-up of the
- * driver, thanks to H.J.Lu (hjl@lucon.org). Removed mode_sense_hack
- * module load option, as it's been fixed in the 2.4 scsi stack.
- * 02/10/02 - Added support for max_sectors, minor fix for inquiry command, make
- * up sbp2 device type from inquiry response data if not part of
- * device's 1394 unit directory. (JSG)
- * 02/18/02 - Code clean-up and enhancements: (JSG)
- * * Finish cleaning out hacked code for dealing with broken sbp2 devices
- * which do not support requests of 128KB or greater. Now use
- * max_sectors scsi host entry to limit transfer sizes.
- * * Change status fifo address from a single address to a set of addresses,
- * with each sbp2 device having its own status fifo address. This makes
- * it easier to match the status write to the sbp2 device instance.
- * * Minor change to use lun when logging into sbp2 devices. First step in
- * supporting multi-lun devices such as CD/DVD changer devices.
- * * Added a new module load option for setting max sectors. For use by folk
- * who'd like to bump up the max scsi transfer size supported.
- * * Enabled deserialized operation by default, allowing for better performance,
- * particularily when running with multiple sbp2 devices. For debugging,
- * you may enable serialization through use of the sbp2_serialize_io module
- * load option (e.g. insmod sbp2 sbp2_serialize_io=1).
- * 02/20/02 - Added a couple additional module load options.
- * Needed to bump down max commands per lun because of the !%@&*^# QPS CDRW
- * drive I have, which doesn't seem to get along with other sbp2 devices
- * (or handle linked commands well).
- * 04/21/02 - Added some additional debug capabilities:
- * * Able to handle phys dma requests directly, if host controller has phys
- * dma disabled (e.g. insmod ohci1394 phys_dma=0). Undefine CONFIG_IEEE1394_SBP2_PHYS_DMA
- * if you'd like to disable sbp2 driver from registering for phys address range.
- * * New packet dump debug define (CONFIG_IEEE1394_SBP2_PACKET_DUMP) which allows
- * dumping of all sbp2 related packets sent and received. Especially effective
- * when phys dma is disabled on ohci controller (e.g. insmod ohci1394 phys_dma=0).
- * * Added new sbp2 module load option (sbp2_exclusive_login) for allowing
- * non-exclusive login to sbp2 device, for special multi-host applications.
- * 04/23/02 - Fix for Sony CD-ROM drives. Only send fetch agent reset to sbp2 device if it
- * returns the dead bit in status. Thanks to Chandan (chandan@toad.net) for this one.
- * 04/27/02 - Fix sbp2 login problem on SMP systems, enable real spinlocks by default. (JSG)
- * 06/09/02 - Don't force 36-bute SCSI inquiry, but leave in a define for badly behaved devices. (JSG)
- */
- /*
- * Includes
- */
- #include <linux/config.h>
- #include <linux/kernel.h>
- #include <linux/list.h>
- #include <linux/string.h>
- #include <linux/slab.h>
- #include <linux/fs.h>
- #include <linux/poll.h>
- #include <linux/module.h>
- #include <linux/types.h>
- #include <linux/delay.h>
- #include <linux/sched.h>
- #include <linux/proc_fs.h>
- #include <linux/blk.h>
- #include <linux/smp_lock.h>
- #include <linux/init.h>
- #include <linux/blk.h>
- #include <asm/current.h>
- #include <asm/uaccess.h>
- #include <asm/io.h>
- #include <asm/byteorder.h>
- #include <asm/atomic.h>
- #include <asm/system.h>
- #include <asm/io.h>
- #include <asm/scatterlist.h>
- #ifdef CONFIG_KBUILD_2_5
- #include <scsi.h>
- #include <hosts.h>
- #include <sd.h>
- #else
- #include "../scsi/scsi.h"
- #include "../scsi/hosts.h"
- #include "../scsi/sd.h"
- #endif
- #include "ieee1394.h"
- #include "ieee1394_types.h"
- #include "ieee1394_core.h"
- #include "hosts.h"
- #include "nodemgr.h"
- #include "highlevel.h"
- #include "ieee1394_transactions.h"
- #include "ieee1394_hotplug.h"
- #include "sbp2.h"
- static char version[] __devinitdata =
- "$Rev: 584 $ James Goodwin <jamesg@filanet.com>";
- /*
- * Module load parameter definitions
- */
- /*
- * Change sbp2_max_speed on module load if you have a bad IEEE-1394
- * controller that has trouble running 2KB packets at 400mb.
- *
- * NOTE: On certain OHCI parts I have seen short packets on async transmit
- * (probably due to PCI latency/throughput issues with the part). You can
- * bump down the speed if you are running into problems.
- *
- * Valid values:
- * sbp2_max_speed = 2 (default: max speed 400mb)
- * sbp2_max_speed = 1 (max speed 200mb)
- * sbp2_max_speed = 0 (max speed 100mb)
- */
- MODULE_PARM(sbp2_max_speed,"i");
- MODULE_PARM_DESC(sbp2_max_speed, "Force max speed (2 = 400mb default, 1 = 200mb, 0 = 100mb)");
- static int sbp2_max_speed = SPEED_400;
- /*
- * Set sbp2_serialize_io to 1 if you'd like only one scsi command sent
- * down to us at a time (debugging). This might be necessary for very
- * badly behaved sbp2 devices.
- */
- MODULE_PARM(sbp2_serialize_io,"i");
- MODULE_PARM_DESC(sbp2_serialize_io, "Serialize all I/O coming down from the scsi drivers (default = 0)");
- static int sbp2_serialize_io = 0; /* serialize I/O - available for debugging purposes */
- /*
- * Bump up sbp2_max_sectors if you'd like to support very large sized
- * transfers. Please note that some older sbp2 bridge chips are broken for
- * transfers greater or equal to 128KB. Default is a value of 255
- * sectors, or just under 128KB (at 512 byte sector size). I can note that
- * the Oxsemi sbp2 chipsets have no problems supporting very large
- * transfer sizes.
- */
- MODULE_PARM(sbp2_max_sectors,"i");
- MODULE_PARM_DESC(sbp2_max_sectors, "Change max sectors per I/O supported (default = 255)");
- static int sbp2_max_sectors = SBP2_MAX_SECTORS;
- /*
- * Adjust sbp2_max_outstanding_cmds to tune performance if you have many
- * sbp2 devices attached (or if you need to do some debugging).
- */
- MODULE_PARM(sbp2_max_outstanding_cmds,"i");
- MODULE_PARM_DESC(sbp2_max_outstanding_cmds, "Change max outstanding concurrent commands (default = 8)");
- static int sbp2_max_outstanding_cmds = SBP2SCSI_MAX_OUTSTANDING_CMDS;
- /*
- * Adjust sbp2_max_cmds_per_lun to tune performance. Enabling more than
- * one concurrent/linked command per sbp2 device may allow some
- * performance gains, but some older sbp2 devices have firmware bugs
- * resulting in problems when linking commands... so, enable this with
- * care. I can note that the Oxsemi OXFW911 sbp2 chipset works very well
- * with large numbers of concurrent/linked commands. =)
- */
- MODULE_PARM(sbp2_max_cmds_per_lun,"i");
- MODULE_PARM_DESC(sbp2_max_cmds_per_lun, "Change max concurrent commands per sbp2 device (default = 1)");
- static int sbp2_max_cmds_per_lun = SBP2SCSI_MAX_CMDS_PER_LUN;
- /*
- * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
- * do an exclusive login, as it's generally unsafe to have two hosts
- * talking to a single sbp2 device at the same time (filesystem coherency,
- * etc.). If you're running an sbp2 device that supports multiple logins,
- * and you're either running read-only filesystems or some sort of special
- * filesystem supporting multiple hosts, then set sbp2_exclusive_login to
- * zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four
- * concurrent logins.
- */
- MODULE_PARM(sbp2_exclusive_login,"i");
- MODULE_PARM_DESC(sbp2_exclusive_login, "Exclusive login to sbp2 device (default = 1)");
- static int sbp2_exclusive_login = 1;
- /*
- * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on
- * if your sbp2 device is not properly handling the SCSI inquiry command.
- * This hack makes the inquiry look more like a typical MS Windows
- * inquiry.
- *
- * If sbp2_force_inquiry_hack=1 is required for your device to work,
- * please submit the logged sbp2_firmware_revision value of this device to
- * the linux1394-devel mailing list.
- */
- MODULE_PARM(sbp2_force_inquiry_hack,"i");
- MODULE_PARM_DESC(sbp2_force_inquiry_hack, "Force SCSI inquiry hack (default = 0)");
- static int sbp2_force_inquiry_hack = 0;
- /*
- * Export information about protocols/devices supported by this driver.
- */
- static struct ieee1394_device_id sbp2_id_table[] = {
- {
- .match_flags =IEEE1394_MATCH_SPECIFIER_ID |
- IEEE1394_MATCH_VERSION,
- .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
- .version = SBP2_SW_VERSION_ENTRY & 0xffffff
- },
- { }
- };
- MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
- /*
- * Debug levels, configured via kernel config, or enable here.
- */
- /* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */
- /* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */
- /* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */
- /* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */
- /* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */
- #ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS
- #define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args)
- static u32 global_outstanding_command_orbs = 0;
- #define outstanding_orb_incr global_outstanding_command_orbs++
- #define outstanding_orb_decr global_outstanding_command_orbs--
- #else
- #define SBP2_ORB_DEBUG(fmt, args...)
- #define outstanding_orb_incr
- #define outstanding_orb_decr
- #endif
- #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA
- #define SBP2_DMA_ALLOC(fmt, args...)
- HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__,
- ++global_outstanding_dmas, ## args)
- #define SBP2_DMA_FREE(fmt, args...)
- HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__,
- --global_outstanding_dmas, ## args)
- static u32 global_outstanding_dmas = 0;
- #else
- #define SBP2_DMA_ALLOC(fmt, args...)
- #define SBP2_DMA_FREE(fmt, args...)
- #endif
- #if CONFIG_IEEE1394_SBP2_DEBUG >= 2
- #define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
- #define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
- #define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
- #define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
- #elif CONFIG_IEEE1394_SBP2_DEBUG == 1
- #define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args)
- #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
- #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
- #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
- #else
- #define SBP2_DEBUG(fmt, args...)
- #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
- #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
- #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
- #endif
- #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
- /*
- * Spinlock debugging stuff.
- */
- #define SBP2_USE_REAL_SPINLOCKS
- #ifdef SBP2_USE_REAL_SPINLOCKS
- #define sbp2_spin_lock(lock, flags) spin_lock_irqsave(lock, flags)
- #define sbp2_spin_unlock(lock, flags) spin_unlock_irqrestore(lock, flags);
- static spinlock_t sbp2_host_info_lock = SPIN_LOCK_UNLOCKED;
- #else
- #define sbp2_spin_lock(lock, flags) do {save_flags(flags); cli();} while (0)
- #define sbp2_spin_unlock(lock, flags) do {restore_flags(flags);} while (0)
- #endif
- /*
- * Globals
- */
- static Scsi_Host_Template scsi_driver_template;
- static u8 sbp2_speedto_maxrec[] = { 0x7, 0x8, 0x9 };
- static LIST_HEAD(sbp2_host_info_list);
- static struct hpsb_highlevel *sbp2_hl_handle = NULL;
- static struct hpsb_highlevel_ops sbp2_hl_ops = {
- .add_host = sbp2_add_host,
- .remove_host = sbp2_remove_host,
- };
- static struct hpsb_address_ops sbp2_ops = {
- .write = sbp2_handle_status_write
- };
- #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
- static struct hpsb_address_ops sbp2_physdma_ops = {
- .read = sbp2_handle_physdma_read,
- .write = sbp2_handle_physdma_write,
- };
- #endif
- static struct hpsb_protocol_driver sbp2_driver = {
- .name = "SBP2 Driver",
- .id_table = sbp2_id_table,
- .probe = sbp2_probe,
- .disconnect = sbp2_disconnect,
- .update = sbp2_update
- };
- /* List of device firmware's that require a forced 36 byte inquiry. */
- static u32 sbp2_broken_inquiry_list[] = {
- 0x00002800, /* Stefan Richter <richtest@bauwesen.tu-cottbus.de> */
- /* DViCO Momobay CX-1 */
- 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */
- /* QPS Fire DVDBurner */
- };
- #define NUM_BROKEN_INQUIRY_DEVS
- (sizeof(sbp2_broken_inquiry_list)/sizeof(*sbp2_broken_inquiry_list))
- /**************************************
- * General utility functions
- **************************************/
- #ifndef __BIG_ENDIAN
- /*
- * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
- */
- static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
- {
- u32 *temp = buffer;
- for (length = (length >> 2); length--; )
- temp[length] = be32_to_cpu(temp[length]);
- return;
- }
- /*
- * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
- */
- static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
- {
- u32 *temp = buffer;
- for (length = (length >> 2); length--; )
- temp[length] = cpu_to_be32(temp[length]);
- return;
- }
- #else /* BIG_ENDIAN */
- /* Why waste the cpu cycles? */
- #define sbp2util_be32_to_cpu_buffer(x,y)
- #define sbp2util_cpu_to_be32_buffer(x,y)
- #endif
- #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
- /*
- * Debug packet dump routine. Length is in bytes.
- */
- static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, u32 dump_phys_addr)
- {
- int i;
- unsigned char *dump = buffer;
- if (!dump || !length || !dump_name)
- return;
- if (dump_phys_addr)
- printk("[%s, 0x%x]", dump_name, dump_phys_addr);
- else
- printk("[%s]", dump_name);
- for (i = 0; i < length; i++) {
- if (i > 0x3f) {
- printk("n ...");
- break;
- }
- if ((i & 0x3) == 0)
- printk(" ");
- if ((i & 0xf) == 0)
- printk("n ");
- printk("%02x ", (int) dump[i]);
- }
- printk("n");
- return;
- }
- #else
- #define sbp2util_packet_dump(w,x,y,z)
- #endif
- /*
- * Goofy routine that basically does a down_timeout function.
- */
- static int sbp2util_down_timeout(atomic_t *done, int timeout)
- {
- int i;
- for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (schedule_timeout(HZ/10)) /* 100ms */
- return(1);
- }
- return ((i > 0) ? 0:1);
- }
- /*
- * This function is called to initially create a packet pool for use in
- * sbp2 I/O requests. This packet pool is used when sending out sbp2
- * command and agent reset requests, and allows us to remove all
- * kmallocs/kfrees from the critical I/O paths.
- */
- static int sbp2util_create_request_packet_pool(struct sbp2scsi_host_info *hi)
- {
- struct hpsb_packet *packet;
- int i;
- hi->request_packet = kmalloc(sizeof(struct sbp2_request_packet) * SBP2_MAX_REQUEST_PACKETS,
- GFP_KERNEL);
- if (!hi->request_packet) {
- SBP2_ERR("sbp2util_create_request_packet_pool - packet allocation failed!");
- return(-ENOMEM);
- }
- memset(hi->request_packet, 0, sizeof(struct sbp2_request_packet) * SBP2_MAX_REQUEST_PACKETS);
- /*
- * Create a pool of request packets. Just take the max supported
- * concurrent commands and multiply by two to be safe...
- */
- for (i=0; i<SBP2_MAX_REQUEST_PACKETS; i++) {
- /*
- * Max payload of 8 bytes since the sbp2 command request
- * uses a payload of 8 bytes, and agent reset is a quadlet
- * write request. Bump this up if we plan on using this
- * pool for other stuff.
- */
- packet = alloc_hpsb_packet(8);
- if (!packet) {
- SBP2_ERR("sbp2util_create_request_packet_pool - packet allocation failed!");
- return(-ENOMEM);
- }
- /*
- * Put these request packets into a free list
- */
- INIT_LIST_HEAD(&hi->request_packet[i].list);
- hi->request_packet[i].packet = packet;
- list_add_tail(&hi->request_packet[i].list, &hi->sbp2_req_free);
- }
- return(0);
- }
- /*
- * This function is called to remove the packet pool. It is called when
- * the sbp2 driver is unloaded.
- */
- static void sbp2util_remove_request_packet_pool(struct sbp2scsi_host_info *hi)
- {
- struct list_head *lh;
- struct sbp2_request_packet *request_packet;
- unsigned long flags;
- /*
- * Go through free list releasing packets
- */
- sbp2_spin_lock(&hi->sbp2_request_packet_lock, flags);
- while (!list_empty(&hi->sbp2_req_free)) {
- lh = hi->sbp2_req_free.next;
- list_del(lh);
- request_packet = list_entry(lh, struct sbp2_request_packet, list);
- /*
- * Free the hpsb packets that we allocated for the pool
- */
- if (request_packet) {
- free_hpsb_packet(request_packet->packet);
- }
- }
- kfree(hi->request_packet);
- sbp2_spin_unlock(&hi->sbp2_request_packet_lock, flags);
- return;
- }
- /*
- * This function is called to retrieve a block write packet from our
- * packet pool. This function is used in place of calling
- * alloc_hpsb_packet (which costs us three kmallocs). Instead we just pull
- * out a free request packet and re-initialize values in it. I'm sure this
- * can still stand some more optimization.
- */
- static struct sbp2_request_packet *
- sbp2util_allocate_write_request_packet(struct sbp2scsi_host_info *hi,
- struct node_entry *ne, u64 addr,
- size_t data_size,
- quadlet_t data) {
- struct list_head *lh;
- struct sbp2_request_packet *request_packet = NULL;
- struct hpsb_packet *packet;
- unsigned long flags;
- sbp2_spin_lock(&hi->sbp2_request_packet_lock, flags);
- if (!list_empty(&hi->sbp2_req_free)) {
- /*
- * Pull out a free request packet
- */
- lh = hi->sbp2_req_free.next;
- list_del(lh);
- request_packet = list_entry(lh, struct sbp2_request_packet, list);
- packet = request_packet->packet;
- /*
- * Initialize the packet (this is really initialization
- * the core 1394 stack should do, but I'm doing it myself
- * to avoid the overhead).
- */
- packet->data_size = data_size;
- INIT_LIST_HEAD(&packet->list);
- sema_init(&packet->state_change, 0);
- packet->state = hpsb_unused;
- packet->data_be = 1;
-
- hpsb_node_fill_packet(ne, packet);
- packet->tlabel = get_tlabel(hi->host, packet->node_id, 0);
- if (!data_size) {
- fill_async_writequad(packet, addr, data);
- } else {
- fill_async_writeblock(packet, addr, data_size);
- }
- /*
- * Set up a task queue completion routine, which returns
- * the packet to the free list and releases the tlabel.
- */
- request_packet->tq.routine = (void (*)(void*))sbp2util_free_request_packet;
- request_packet->tq.data = request_packet;
- request_packet->hi_context = hi;
- hpsb_add_packet_complete_task(packet, &request_packet->tq);
- /*
- * Now, put the packet on the in-use list.
- */
- list_add_tail(&request_packet->list, &hi->sbp2_req_inuse);
- } else {
- SBP2_ERR("sbp2util_allocate_request_packet - no packets available!");
- }
- sbp2_spin_unlock(&hi->sbp2_request_packet_lock, flags);
- return(request_packet);
- }
- /*
- * This function is called to return a packet to our packet pool. It is
- * also called as a completion routine when a request packet is completed.
- */
- static void sbp2util_free_request_packet(struct sbp2_request_packet *request_packet)
- {
- unsigned long flags;
- struct sbp2scsi_host_info *hi = request_packet->hi_context;
- /*
- * Free the tlabel, and return the packet to the free pool.
- */
- sbp2_spin_lock(&hi->sbp2_request_packet_lock, flags);
- free_tlabel(hi->host, LOCAL_BUS | request_packet->packet->node_id,
- request_packet->packet->tlabel);
- list_del(&request_packet->list);
- list_add_tail(&request_packet->list, &hi->sbp2_req_free);
- sbp2_spin_unlock(&hi->sbp2_request_packet_lock, flags);
- return;
- }
- /*
- * This function is called to create a pool of command orbs used for
- * command processing. It is called when a new sbp2 device is detected.
- */
- static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id,
- struct sbp2scsi_host_info *hi)
- {
- int i;
- unsigned long flags;
- struct sbp2_command_info *command;
-
- sbp2_spin_lock(&scsi_id->sbp2_command_orb_lock, flags);
- for (i = 0; i < scsi_id->sbp2_total_command_orbs; i++) {
- command = (struct sbp2_command_info *)
- kmalloc(sizeof(struct sbp2_command_info), GFP_KERNEL);
- if (!command) {
- sbp2_spin_unlock(&scsi_id->sbp2_command_orb_lock, flags);
- return(-ENOMEM);
- }
- memset(command, ' ', sizeof(struct sbp2_command_info));
- command->command_orb_dma =
- pci_map_single (hi->host->pdev, &command->command_orb,
- sizeof(struct sbp2_command_orb),
- PCI_DMA_BIDIRECTIONAL);
- SBP2_DMA_ALLOC("single command orb DMA");
- command->sge_dma =
- pci_map_single (hi->host->pdev, &command->scatter_gather_element,
- sizeof(command->scatter_gather_element),
- PCI_DMA_BIDIRECTIONAL);
- SBP2_DMA_ALLOC("scatter_gather_element");
- INIT_LIST_HEAD(&command->list);
- list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
- }
- sbp2_spin_unlock(&scsi_id->sbp2_command_orb_lock, flags);
- return 0;
- }
- /*
- * This function is called to delete a pool of command orbs.
- */
- static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id,
- struct sbp2scsi_host_info *hi)
- {
- struct list_head *lh, *next;
- struct sbp2_command_info *command;
- unsigned long flags;
-
- sbp2_spin_lock(&scsi_id->sbp2_command_orb_lock, flags);
- if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
- list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) {
- command = list_entry(lh, struct sbp2_command_info, list);
- /* Release our generic DMA's */
- pci_unmap_single(hi->host->pdev, command->command_orb_dma,
- sizeof(struct sbp2_command_orb),
- PCI_DMA_BIDIRECTIONAL);
- SBP2_DMA_FREE("single command orb DMA");
- pci_unmap_single(hi->host->pdev, command->sge_dma,
- sizeof(command->scatter_gather_element),
- PCI_DMA_BIDIRECTIONAL);
- SBP2_DMA_FREE("scatter_gather_element");
- kfree(command);
- }
- }
- sbp2_spin_unlock(&scsi_id->sbp2_command_orb_lock, flags);
- return;
- }
- /*
- * This function finds the sbp2_command for a given outstanding command
- * orb.Only looks at the inuse list.
- */
- static struct sbp2_command_info *sbp2util_find_command_for_orb(
- struct scsi_id_instance_data *scsi_id, dma_addr_t orb)
- {
- struct list_head *lh;
- struct sbp2_command_info *command;
- unsigned long flags;
- sbp2_spin_lock(&scsi_id->sbp2_command_orb_lock, flags);
- if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
- list_for_each(lh, &scsi_id->sbp2_command_orb_inuse) {
- command = list_entry(lh, struct sbp2_command_info, list);
- if (command->command_orb_dma == orb) {
- sbp2_spin_unlock(&scsi_id->sbp2_command_orb_lock, flags);
- return (command);
- }
- }
- }
- sbp2_spin_unlock(&scsi_id->sbp2_command_orb_lock, flags);
- SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb);
- return(NULL);
- }
- /*
- * This function finds the sbp2_command for a given outstanding SCpnt.
- * Only looks at the inuse list.
- */
- static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt)
- {
- struct list_head *lh;
- struct sbp2_command_info *command;
- unsigned long flags;
- sbp2_spin_lock(&scsi_id->sbp2_command_orb_lock, flags);
- if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
- list_for_each(lh, &scsi_id->sbp2_command_orb_inuse) {
- command = list_entry(lh, struct sbp2_command_info, list);
- if (command->Current_SCpnt == SCpnt) {
- sbp2_spin_unlock(&scsi_id->sbp2_command_orb_lock, flags);
- return (command);
- }
- }
- }
- sbp2_spin_unlock(&scsi_id->sbp2_command_orb_lock, flags);
- return(NULL);
- }
- /*
- * This function allocates a command orb used to send a scsi command.
- */
- static struct sbp2_command_info *sbp2util_allocate_command_orb(
- struct scsi_id_instance_data *scsi_id,
- Scsi_Cmnd *Current_SCpnt,
- void (*Current_done)(Scsi_Cmnd *),
- struct sbp2scsi_host_info *hi)
- {
- struct list_head *lh;
- struct sbp2_command_info *command = NULL;
- unsigned long flags;
- sbp2_spin_lock(&scsi_id->sbp2_command_orb_lock, flags);
- if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
- lh = scsi_id->sbp2_command_orb_completed.next;
- list_del(lh);
- command = list_entry(lh, struct sbp2_command_info, list);
- command->Current_done = Current_done;
- command->Current_SCpnt = Current_SCpnt;
- list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse);
- } else {
- SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!");
- }
- sbp2_spin_unlock(&scsi_id->sbp2_command_orb_lock, flags);
- return (command);
- }
- /* Free our DMA's */
- static void sbp2util_free_command_dma(struct sbp2_command_info *command)
- {
- struct sbp2scsi_host_info *hi;
-
- hi = (struct sbp2scsi_host_info *) command->Current_SCpnt->host->hostdata[0];
- if (hi == NULL) {
- printk(KERN_ERR "%s: hi == NULLn", __FUNCTION__);
- return;
- }
- if (command->cmd_dma) {
- if (command->dma_type == CMD_DMA_SINGLE) {
- pci_unmap_single(hi->host->pdev, command->cmd_dma,
- command->dma_size, command->dma_dir);
- SBP2_DMA_FREE("single bulk");
- } else if (command->dma_type == CMD_DMA_PAGE) {
- #if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,13)
- pci_unmap_single(hi->host->pdev, command->cmd_dma,
- command->dma_size, command->dma_dir);
- #else
- pci_unmap_page(hi->host->pdev, command->cmd_dma,
- command->dma_size, command->dma_dir);
- #endif /* Linux version < 2.4.13 */
- SBP2_DMA_FREE("single page");
- } /* XXX: Check for CMD_DMA_NONE bug */
- command->dma_type = CMD_DMA_NONE;
- command->cmd_dma = 0;
- }
- if (command->sge_buffer) {
- pci_unmap_sg(hi->host->pdev, command->sge_buffer,
- command->dma_size, command->dma_dir);
- SBP2_DMA_FREE("scatter list");
- command->sge_buffer = NULL;
- }
- }
- /*
- * This function moves a command to the completed orb list.
- */
- static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id, struct sbp2_command_info *command)
- {
- unsigned long flags;
- sbp2_spin_lock(&scsi_id->sbp2_command_orb_lock, flags);
- list_del(&command->list);
- sbp2util_free_command_dma(command);
- list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
- sbp2_spin_unlock(&scsi_id->sbp2_command_orb_lock, flags);
- }
- /*********************************************
- * IEEE-1394 core driver stack related section
- *********************************************/
- /*
- * This function is called at SCSI init in order to register our driver
- * with the IEEE-1394 stack.
- */
- int sbp2_init(void)
- {
- SBP2_DEBUG("sbp2_init");
- /*
- * Register our high level driver with 1394 stack
- */
- sbp2_hl_handle = hpsb_register_highlevel(SBP2_DEVICE_NAME, &sbp2_hl_ops);
- if (sbp2_hl_handle == NULL) {
- SBP2_ERR("sbp2 failed to register with ieee1394 highlevel");
- return(-ENOMEM);
- }
- /*
- * Register our sbp2 status address space...
- */
- hpsb_register_addrspace(sbp2_hl_handle, &sbp2_ops, SBP2_STATUS_FIFO_ADDRESS,
- SBP2_STATUS_FIFO_ADDRESS +
- SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(SBP2SCSI_MAX_SCSI_IDS+1));
- /*
- * Handle data movement if physical dma is not enabled/supported on host controller
- */
- #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
- hpsb_register_addrspace(sbp2_hl_handle, &sbp2_physdma_ops, 0x0ULL, 0xfffffffcULL);
- #endif
- hpsb_register_protocol(&sbp2_driver);
- return 0;
- }
- /*
- * This function is called from cleanup module, or during shut-down, in
- * order to unregister our driver.
- */
- void sbp2_cleanup(void)
- {
- SBP2_DEBUG("sbp2_cleanup");
- hpsb_unregister_protocol(&sbp2_driver);
- if (sbp2_hl_handle) {
- hpsb_unregister_highlevel(sbp2_hl_handle);
- sbp2_hl_handle = NULL;
- }
- }
- static int sbp2_probe(struct unit_directory *ud)
- {
- struct sbp2scsi_host_info *hi;
- SBP2_DEBUG("sbp2_probe");
- hi = sbp2_find_host_info(ud->ne->host);
- return sbp2_start_device(hi, ud);
- }
- static void sbp2_disconnect(struct unit_directory *ud)
- {
- struct sbp2scsi_host_info *hi;
- struct scsi_id_instance_data *scsi_id = ud->driver_data;
- SBP2_DEBUG("sbp2_disconnect");
- hi = sbp2_find_host_info(ud->ne->host);
- if (hi != NULL) {
- sbp2_logout_device(hi, scsi_id);
- sbp2_remove_device(hi, scsi_id);
- }
- }
- static void sbp2_update(struct unit_directory *ud)
- {
- struct sbp2scsi_host_info *hi;
- struct scsi_id_instance_data *scsi_id = ud->driver_data;
- unsigned long flags;
- SBP2_DEBUG("sbp2_update");
- hi = sbp2_find_host_info(ud->ne->host);
- if (sbp2_reconnect_device(hi, scsi_id)) {
-
- /*
- * Ok, reconnect has failed. Perhaps we didn't
- * reconnect fast enough. Try doing a regular login.
- */
- if (sbp2_login_device(hi, scsi_id)) {
- /* Login failed too, just remove the device. */
- SBP2_ERR("sbp2_reconnect_device failed!");
- sbp2_remove_device(hi, scsi_id);
- hpsb_release_unit_directory(ud);
- return;
- }
- }
- /* Set max retries to something large on the device. */
- sbp2_set_busy_timeout(hi, scsi_id);
- /* Do a SBP-2 fetch agent reset. */
- sbp2_agent_reset(hi, scsi_id, 0);
-
- /* Get the max speed and packet size that we can use. */
- sbp2_max_speed_and_size(hi, scsi_id);
- /* Complete any pending commands with busy (so they get
- * retried) and remove them from our queue
- */
- sbp2_spin_lock(&hi->sbp2_command_lock, flags);
- sbp2scsi_complete_all_commands(hi, scsi_id, DID_BUS_BUSY);
- sbp2_spin_unlock(&hi->sbp2_command_lock, flags);
- }
- /*
- * This function is called after registering our operations in sbp2_init.
- * We go ahead and allocate some memory for our host info structure, and
- * init some structures.
- */
- static void sbp2_add_host(struct hpsb_host *host)
- {
- struct sbp2scsi_host_info *hi;
- unsigned long flags;
- SBP2_DEBUG("sbp2_add_host");
- /* Allocate some memory for our host info structure */
- hi = (struct sbp2scsi_host_info *)kmalloc(sizeof(struct sbp2scsi_host_info),
- GFP_KERNEL);
- if (hi == NULL) {
- SBP2_ERR("out of memory in sbp2_add_host");
- return;
- }
- /* Initialize some host stuff */
- memset(hi, 0, sizeof(struct sbp2scsi_host_info));
- INIT_LIST_HEAD(&hi->list);
- INIT_LIST_HEAD(&hi->sbp2_req_inuse);
- INIT_LIST_HEAD(&hi->sbp2_req_free);
- hi->host = host;
- hi->sbp2_command_lock = SPIN_LOCK_UNLOCKED;
- hi->sbp2_request_packet_lock = SPIN_LOCK_UNLOCKED;
- /* Create our request packet pool (pool of packets for use in I/O) */
- if (sbp2util_create_request_packet_pool(hi)) {
- SBP2_ERR("sbp2util_create_request_packet_pool failed!");
- return;
- }
- sbp2_spin_lock(&sbp2_host_info_lock, flags);
- list_add_tail(&hi->list, &sbp2_host_info_list);
- sbp2_spin_unlock(&sbp2_host_info_lock, flags);
- /* Register our host with the SCSI stack. */
- hi->scsi_host = scsi_register (&scsi_driver_template, sizeof(void *));
- if (hi->scsi_host) {
- hi->scsi_host->hostdata[0] = (unsigned long)hi;
- hi->scsi_host->max_id = SBP2SCSI_MAX_SCSI_IDS;
- }
- scsi_driver_template.present++;
- return;
- }
- /*
- * This fuction returns a host info structure from the host structure, in
- * case we have multiple hosts.
- */
- static struct sbp2scsi_host_info *sbp2_find_host_info(struct hpsb_host *host)
- {
- struct list_head *lh;
- struct sbp2scsi_host_info *hi;
- list_for_each (lh, &sbp2_host_info_list) {
- hi = list_entry(lh, struct sbp2scsi_host_info, list);
- if (hi->host == host)
- return hi;
- }
- return NULL;
- }
- /*
- * This function returns a host info structure for a given Scsi_Host
- * struct.
- */
- static struct sbp2scsi_host_info *sbp2_find_host_info_scsi(struct Scsi_Host *host)
- {
- struct list_head *lh;
- struct sbp2scsi_host_info *hi;
- list_for_each (lh, &sbp2_host_info_list) {
- hi = list_entry(lh, struct sbp2scsi_host_info, list);
- if (hi->scsi_host == host)
- return hi;
- }
- return NULL;
- }
- /*
- * This function is called when a host is removed.
- */
- static void sbp2_remove_host(struct hpsb_host *host)
- {
- struct sbp2scsi_host_info *hi;
- unsigned long flags;
- SBP2_DEBUG("sbp2_remove_host");
- sbp2_spin_lock(&sbp2_host_info_lock, flags);
- hi = sbp2_find_host_info(host);
- if (hi != NULL) {
- sbp2util_remove_request_packet_pool(hi);
- list_del(&hi->list);
- kfree(hi);
- }
- else
- SBP2_ERR("attempt to remove unknown host %p", host);
- sbp2_spin_unlock(&sbp2_host_info_lock, flags);
- }
- /*
- * This function is where we first pull the node unique ids, and then
- * allocate memory and register a SBP-2 device.
- */
- static int sbp2_start_device(struct sbp2scsi_host_info *hi, struct unit_directory *ud)
- {
- struct scsi_id_instance_data *scsi_id = NULL;
- struct node_entry *ne;
- int i;
- SBP2_DEBUG("sbp2_start_device");
- ne = ud->ne;
- /*
- * This really is a "new" device plugged in. Let's allocate memory
- * for our scsi id instance data.
- */
- scsi_id = (struct scsi_id_instance_data *)kmalloc(sizeof(struct scsi_id_instance_data),
- GFP_KERNEL);
- if (!scsi_id)
- goto alloc_fail_first;
- memset(scsi_id, 0, sizeof(struct scsi_id_instance_data));
- /* Login FIFO DMA */
- scsi_id->login_response =
- pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_response),
- &scsi_id->login_response_dma);
- if (!scsi_id->login_response)
- goto alloc_fail;
- SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
- /* Reconnect ORB DMA */
- scsi_id->reconnect_orb =
- pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_reconnect_orb),
- &scsi_id->reconnect_orb_dma);
- if (!scsi_id->reconnect_orb)
- goto alloc_fail;
- SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
- /* Logout ORB DMA */
- scsi_id->logout_orb =
- pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_logout_orb),
- &scsi_id->logout_orb_dma);
- if (!scsi_id->logout_orb)
- goto alloc_fail;
- SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
- /* Login ORB DMA */
- scsi_id->login_orb =
- pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_orb),
- &scsi_id->login_orb_dma);
- if (scsi_id->login_orb == NULL) {
- alloc_fail:
- if (scsi_id->logout_orb) {
- pci_free_consistent(hi->host->pdev,
- sizeof(struct sbp2_logout_orb),
- scsi_id->logout_orb,
- scsi_id->logout_orb_dma);
- SBP2_DMA_FREE("logout ORB DMA");
- }
- if (scsi_id->reconnect_orb) {
- pci_free_consistent(hi->host->pdev,
- sizeof(struct sbp2_reconnect_orb),
- scsi_id->reconnect_orb,
- scsi_id->reconnect_orb_dma);
- SBP2_DMA_FREE("reconnect ORB DMA");
- }
- if (scsi_id->login_response) {
- pci_free_consistent(hi->host->pdev,
- sizeof(struct sbp2_login_response),
- scsi_id->login_response,
- scsi_id->login_response_dma);
- SBP2_DMA_FREE("login FIFO DMA");
- }
- kfree(scsi_id);
- alloc_fail_first:
- SBP2_ERR ("Could not allocate memory for scsi_id");
- return(-ENOMEM);
- }
- SBP2_DMA_ALLOC("consistent DMA region for login ORB");
- /*
- * Initialize some of the fields in this structure
- */
- scsi_id->ne = ne;
- scsi_id->ud = ud;
- scsi_id->speed_code = SPEED_100;
- scsi_id->max_payload_size = sbp2_speedto_maxrec[SPEED_100];
- ud->driver_data = scsi_id;
- atomic_set(&scsi_id->sbp2_login_complete, 0);
- /*
- * Initialize structures needed for the command orb pool.
- */
- INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse);
- INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed);
- scsi_id->sbp2_command_orb_lock = SPIN_LOCK_UNLOCKED;
- scsi_id->sbp2_total_command_orbs = 0;
- /*
- * Make sure that we've gotten ahold of the sbp2 management agent
- * address. Also figure out the command set being used (SCSI or
- * RBC).
- */
- sbp2_parse_unit_directory(scsi_id);
- scsi_id->sbp2_total_command_orbs = SBP2_MAX_COMMAND_ORBS;
- /*
- * Knock the total command orbs down if we are serializing I/O
- */
- if (sbp2_serialize_io) {
- scsi_id->sbp2_total_command_orbs = 2; /* one extra for good measure */
- }
- /*
- * Find an empty spot to stick our scsi id instance data.
- */
- for (i = 0; i < SBP2SCSI_MAX_SCSI_IDS; i++) {
- if (!hi->scsi_id[i]) {
- hi->scsi_id[i] = scsi_id;
- scsi_id->id = i;
- SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", (unsigned int) i);
- break;
- }
- }
- /*
- * Create our command orb pool
- */
- if (sbp2util_create_command_orb_pool(scsi_id, hi)) {
- SBP2_ERR("sbp2util_create_command_orb_pool failed!");
- sbp2_remove_device(hi, scsi_id);
- return -ENOMEM;
- }
- /*
- * Make sure we are not out of space
- */
- if (i == SBP2SCSI_MAX_SCSI_IDS) {
- SBP2_ERR("No slots left for SBP-2 device");
- sbp2_remove_device(hi, scsi_id);
- return -EBUSY;
- }
- /*
- * Login to the sbp-2 device
- */
- if (sbp2_login_device(hi, scsi_id)) {
- /* Login failed, just remove the device. */
- SBP2_ERR("sbp2_login_device failed");
- sbp2_remove_device(hi, scsi_id);
- return -EBUSY;
- }
- /*
- * Set max retries to something large on the device
- */
- sbp2_set_busy_timeout(hi, scsi_id);
-
- /*
- * Do a SBP-2 fetch agent reset
- */
- sbp2_agent_reset(hi, scsi_id, 0);
-
- /*
- * Get the max speed and packet size that we can use
- */
- sbp2_max_speed_and_size(hi, scsi_id);
- return 0;
- }
- /*
- * This function removes an sbp2 device from the sbp2scsi_host_info struct.
- */
- static void sbp2_remove_device(struct sbp2scsi_host_info *hi,
- struct scsi_id_instance_data *scsi_id)
- {
- SBP2_DEBUG("sbp2_remove_device");
- /* Complete any pending commands with selection timeout */
- sbp2scsi_complete_all_commands(hi, scsi_id, DID_NO_CONNECT);
-
- /* Clean up any other structures */
- if (scsi_id->sbp2_total_command_orbs) {
- sbp2util_remove_command_orb_pool(scsi_id, hi);
- }
- if (scsi_id->login_response) {
- pci_free_consistent(hi->host->pdev,
- sizeof(struct sbp2_login_response),
- scsi_id->login_response,
- scsi_id->login_response_dma);
- SBP2_DMA_FREE("single login FIFO");
- }
- if (scsi_id->login_orb) {
- pci_free_consistent(hi->host->pdev,
- sizeof(struct sbp2_login_orb),
- scsi_id->login_orb,
- scsi_id->login_orb_dma);
- SBP2_DMA_FREE("single login ORB");
- }
- if (scsi_id->reconnect_orb) {
- pci_free_consistent(hi->host->pdev,
- sizeof(struct sbp2_reconnect_orb),
- scsi_id->reconnect_orb,
- scsi_id->reconnect_orb_dma);
- SBP2_DMA_FREE("single reconnect orb");
- }
- if (scsi_id->logout_orb) {
- pci_free_consistent(hi->host->pdev,
- sizeof(struct sbp2_logout_orb),
- scsi_id->logout_orb,
- scsi_id->reconnect_orb_dma);
- SBP2_DMA_FREE("single logout orb");
- }
- SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->id);
- hi->scsi_id[scsi_id->id] = NULL;
- kfree(scsi_id);
- }
- #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
- /*
- * This function deals with physical dma write requests (for adapters that do not support
- * physical dma in hardware). Mostly just here for debugging...
- */
- static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, int destid, quadlet_t *data,
- u64 addr, unsigned int length)
- {
- /*
- * Manually put the data in the right place.
- */
- memcpy(bus_to_virt((u32)addr), data, length);
- sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", (u32)addr);
- return(RCODE_COMPLETE);
- }
- /*
- * This function deals with physical dma read requests (for adapters that do not support
- * physical dma in hardware). Mostly just here for debugging...
- */
- static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, quadlet_t *data,
- u64 addr, unsigned int length)
- {
- /*
- * Grab data from memory and send a read response.
- */
- memcpy(data, bus_to_virt((u32)addr), length);
- sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", (u32)addr);
- return(RCODE_COMPLETE);
- }
- #endif
- /**************************************
- * SBP-2 protocol related section
- **************************************/
- /*
- * This function determines if we should convert scsi commands for a particular sbp2 device type
- */
- static __inline__ int sbp2_command_conversion_device_type(u8 device_type)
- {
- return (((device_type == TYPE_DISK) ||
- (device_type == TYPE_SDAD) ||
- (device_type == TYPE_ROM)) ? 1:0);
- }
- /*
- * This function is called in order to login to a particular SBP-2 device,
- * after a bus reset.
- */
- static int sbp2_login_device(struct sbp2scsi_host_info *hi, struct scsi_id_instance_data *scsi_id)
- {
- quadlet_t data[2];
- SBP2_DEBUG("sbp2_login_device");
- if (!scsi_id->login_orb) {
- SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!");
- return(-EIO);
- }
- /* Set-up login ORB, assume no password */
- scsi_id->login_orb->password_hi = 0;
- scsi_id->login_orb->password_lo = 0;
- SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized");
- scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma;
- scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
- SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized");
- scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(LOGIN_REQUEST);
- scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */
- scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login); /* Exclusive access to device */
- scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */
- /* Set the lun if we were able to pull it from the device's unit directory */
- if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
- scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun);
- }
- SBP2_DEBUG("sbp2_login_device: lun_misc initialized");
- scsi_id->login_orb->passwd_resp_lengths =
- ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
- SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized");
- scsi_id->login_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
- SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->id);
- scsi_id->login_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
- SBP2_STATUS_FIFO_ADDRESS_HI);
- SBP2_DEBUG("sbp2_login_device: status FIFO initialized");
- /*
- * Byte swap ORB if necessary
- */
- sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb));
- SBP2_DEBUG("sbp2_login_device: orb byte-swapped");
- sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb),
- "sbp2 login orb", scsi_id->login_orb_dma);
- /*
- * Initialize login response and status fifo
- */
- memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response));
- memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
- SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset");
- /*
- * Ok, let's write to the target's management agent register
- */
- data[0] = ORB_SET_NODE_ID(hi->host->node_id);
- data[1] = scsi_id->login_orb_dma;
- sbp2util_cpu_to_be32_buffer(data, 8);
- atomic_set(&scsi_id->sbp2_login_complete, 0);
- SBP2_DEBUG("sbp2_login_device: prepared to write");
- hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
- SBP2_DEBUG("sbp2_login_device: written");
- /*
- * Wait for login status (up to 20 seconds)...
- */
- if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) {
- SBP2_ERR("Error logging into SBP-2 device - login timed-out");
- return(-EIO);
- }
- /*
- * Sanity. Make sure status returned matches login orb.
- */
- if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) {
- SBP2_ERR("Error logging into SBP-2 device - login timed-out");
- return(-EIO);
- }
- /*
- * Check status
- */
- if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
- STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
- STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
- SBP2_ERR("Error logging into SBP-2 device - login failed");
- return(-EIO);
- }
- /*
- * Byte swap the login response, for use when reconnecting or
- * logging out.
- */
- sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response));
- /*
- * Grab our command block agent address from the login response.
- */
- SBP2_DEBUG("command_block_agent_hi = %x",
- (unsigned int)scsi_id->login_response->command_block_agent_hi);
- SBP2_DEBUG("command_block_agent_lo = %x",
- (unsigned int)scsi_id->login_response->command_block_agent_lo);
- scsi_id->sbp2_command_block_agent_addr =
- ((u64)scsi_id->login_response->command_block_agent_hi) << 32;
- scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo);
- scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL;
- SBP2_INFO("Logged into SBP-2 device");
- return(0);
- }
- /*
- * This function is called in order to logout from a particular SBP-2
- * device, usually called during driver unload.
- */
- static int sbp2_logout_device(struct sbp2scsi_host_info *hi, struct scsi_id_instance_data *scsi_id)
- {
- quadlet_t data[2];
- SBP2_DEBUG("sbp2_logout_device");
- /*
- * Set-up logout ORB
- */
- scsi_id->logout_orb->reserved1 = 0x0;
- scsi_id->logout_orb->reserved2 = 0x0;
- scsi_id->logout_orb->reserved3 = 0x0;
- scsi_id->logout_orb->reserved4 = 0x0;
- scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(LOGOUT_REQUEST);
- scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
- /* Notify us when complete */
- scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
- scsi_id->logout_orb->reserved5 = 0x0;
- scsi_id->logout_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
- SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->id);
- scsi_id->logout_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
- SBP2_STATUS_FIFO_ADDRESS_HI);
- /*
- * Byte swap ORB if necessary
- */
- sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb));
- sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb),
- "sbp2 logout orb", scsi_id->logout_orb_dma);
- /*
- * Ok, let's write to the target's management agent register
- */
- data[0] = ORB_SET_NODE_ID(hi->host->node_id);
- data[1] = scsi_id->logout_orb_dma;
- sbp2util_cpu_to_be32_buffer(data, 8);
- atomic_set(&scsi_id->sbp2_login_complete, 0);
- hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
- /* Wait for device to logout...1 second. */
- sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ);
- SBP2_INFO("Logged out of SBP-2 device");
- return(0);
- }
- /*
- * This function is called in order to reconnect to a particular SBP-2
- * device, after a bus reset.
- */
- static int sbp2_reconnect_device(struct sbp2scsi_host_info *hi, struct scsi_id_instance_data *scsi_id)
- {
- quadlet_t data[2];
- SBP2_DEBUG("sbp2_reconnect_device");
- /*
- * Set-up reconnect ORB
- */
- scsi_id->reconnect_orb->reserved1 = 0x0;
- scsi_id->reconnect_orb->reserved2 = 0x0;
- scsi_id->reconnect_orb->reserved3 = 0x0;
- scsi_id->reconnect_orb->reserved4 = 0x0;
- scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(RECONNECT_REQUEST);
- scsi_id->reconnect_orb->login_ID_misc |=
- ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
- /* Notify us when complete */
- scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
- scsi_id->reconnect_orb->reserved5 = 0x0;
- scsi_id->reconnect_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
- SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->id);
- scsi_id->reconnect_orb->status_FIFO_hi =
- (ORB_SET_NODE_ID(hi->host->node_id) | SBP2_STATUS_FIFO_ADDRESS_HI);
- /*
- * Byte swap ORB if necessary
- */
- sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb));
- sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb),
- "sbp2 reconnect orb", scsi_id->reconnect_orb_dma);
- /*
- * Initialize status fifo
- */
- memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
- /*
- * Ok, let's write to the target's management agent register
- */
- data[0] = ORB_SET_NODE_ID(hi->host->node_id);
- data[1] = scsi_id->reconnect_orb_dma;
- sbp2util_cpu_to_be32_buffer(data, 8);
- atomic_set(&scsi_id->sbp2_login_complete, 0);
- hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
- /*
- * Wait for reconnect status (up to 1 second)...
- */
- if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) {
- SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
- return(-EIO);
- }
- /*
- * Sanity. Make sure status returned matches reconnect orb.
- */
- if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) {
- SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
- return(-EIO);
- }
- /*
- * Check status
- */
- if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
- STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
- STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
- SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed");
- return(-EIO);
- }
- SBP2_INFO("Reconnected to SBP-2 device");
- return(0);
- }
- /*
- * This function is called in order to set the busy timeout (number of
- * retries to attempt) on the sbp2 device.
- */
- static int sbp2_set_busy_timeout(struct sbp2scsi_host_info *hi, struct scsi_id_instance_data *scsi_id)
- {
- quadlet_t data;
- SBP2_DEBUG("sbp2_set_busy_timeout");
- /*
- * Ok, let's write to the target's busy timeout register
- */
- data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
- if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) {
- SBP2_ERR("sbp2_set_busy_timeout error");
- }
- return(0);
- }
- /*
- * This function is called to parse sbp2 device's config rom unit
- * directory. Used to determine things like sbp2 management agent offset,
- * and command set used (SCSI or RBC).
- */
- static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id)
- {
- struct unit_directory *ud;
- int i;
- SBP2_DEBUG("sbp2_parse_unit_directory");
- /* Initialize some fields, in case an entry does not exist */
- scsi_id->sbp2_device_type_and_lun = SBP2_DEVICE_TYPE_LUN_UNINITIALIZED;
- scsi_id->sbp2_management_agent_addr = 0x0;
- scsi_id->sbp2_command_set_spec_id = 0x0;
- scsi_id->sbp2_command_set = 0x0;
- scsi_id->sbp2_unit_characteristics = 0x0;
- scsi_id->sbp2_firmware_revision = 0x0;
- ud = scsi_id->ud;
- /* Handle different fields in the unit directory, based on keys */
- for (i = 0; i < ud->count; i++) {
- switch (CONFIG_ROM_KEY(ud->quadlets[i])) {
- case SBP2_CSR_OFFSET_KEY:
- /* Save off the management agent address */
- scsi_id->sbp2_management_agent_addr =
- CSR_REGISTER_BASE +
- (CONFIG_ROM_VALUE(ud->quadlets[i]) << 2);
- SBP2_DEBUG("sbp2_management_agent_addr = %x",
- (unsigned int) scsi_id->sbp2_management_agent_addr);
- break;
- case SBP2_COMMAND_SET_SPEC_ID_KEY:
- /* Command spec organization */
- scsi_id->sbp2_command_set_spec_id
- = CONFIG_ROM_VALUE(ud->quadlets[i]);
- SBP2_DEBUG("sbp2_command_set_spec_id = %x",
- (unsigned int) scsi_id->sbp2_command_set_spec_id);
- break;
- case SBP2_COMMAND_SET_KEY:
- /* Command set used by sbp2 device */
- scsi_id->sbp2_command_set
- = CONFIG_ROM_VALUE(ud->quadlets[i]);
- SBP2_DEBUG("sbp2_command_set = %x",
- (unsigned int) scsi_id->sbp2_command_set);
- break;
- case SBP2_UNIT_CHARACTERISTICS_KEY:
- /*
- * Unit characterisitcs (orb related stuff
- * that I'm not yet paying attention to)
- */
- scsi_id->sbp2_unit_characteristics
- = CONFIG_ROM_VALUE(ud->quadlets[i]);
- SBP2_DEBUG("sbp2_unit_characteristics = %x",
- (unsigned int) scsi_id->sbp2_unit_characteristics);
- break;
- case SBP2_DEVICE_TYPE_AND_LUN_KEY:
- /*
- * Device type and lun (used for
- * detemining type of sbp2 device)
- */
- scsi_id->sbp2_device_type_and_lun
- = CONFIG_ROM_VALUE(ud->quadlets[i]);
- SBP2_DEBUG("sbp2_device_type_and_lun = %x",
- (unsigned int) scsi_id->sbp2_device_type_and_lun);
- break;
- case SBP2_FIRMWARE_REVISION_KEY:
- /* Firmware revision */
- scsi_id->sbp2_firmware_revision
- = CONFIG_ROM_VALUE(ud->quadlets[i]);
- if (sbp2_force_inquiry_hack)
- SBP2_INFO("sbp2_firmware_revision = %x",
- (unsigned int) scsi_id->sbp2_firmware_revision);
- else SBP2_DEBUG("sbp2_firmware_revision = %x",
- (unsigned int) scsi_id->sbp2_firmware_revision);
- break;
- default:
- break;
- }
- }
- /* This is the start of our broken device checking. We try to hack
- * around oddities and known defects. */
- scsi_id->workarounds = 0x0;
- /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a
- * bridge with 128KB max transfer size limitation. For sanity, we
- * only voice this when the current sbp2_max_sectors setting
- * exceeds the 128k limit. By default, that is not the case.
- *
- * It would be really nice if we could detect this before the scsi
- * host gets initialized. That way we can down-force the
- * sbp2_max_sectors to account for it. That is not currently
- * possible. */
- if ((scsi_id->sbp2_firmware_revision & 0xffff00) ==
- SBP2_128KB_BROKEN_FIRMWARE &&
- (sbp2_max_sectors * 512) > (128 * 1024)) {
- SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.",
- NODE_BUS_ARGS(scsi_id->ne->nodeid));
- SBP2_WARN("WARNING: Current sbp2_max_sectors setting is larger than 128KB (%d sectors)!",
- sbp2_max_sectors);
- scsi_id->workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER;
- }
- /* Check for a blacklisted set of devices that require us to force
- * a 36 byte host inquiry. This can be overriden as a module param
- * (to force all hosts). */
- for (i = 0; i < NUM_BROKEN_INQUIRY_DEVS; i++) {
- if ((scsi_id->sbp2_firmware_revision & 0xffff00) ==
- sbp2_broken_inquiry_list[i]) {
- SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround",
- NODE_BUS_ARGS(scsi_id->ne->nodeid));
- scsi_id->workarounds |= SBP2_BREAKAGE_INQUIRY_HACK;
- break; /* No need to continue. */
- }
- }
- }
- /*
- * This function is called in order to determine the max speed and packet
- * size we can use in our ORBs. Note, that we (the driver and host) only
- * initiate the transaction. The SBP-2 device actually transfers the data
- * (by reading from the DMA area we tell it). This means that the SBP-2
- * device decides the actual maximum data it can transfer. We just tell it
- * the speed that it needs to use, and the max_rec the host supports, and
- * it takes care of the rest.
- */
- static int sbp2_max_speed_and_size(struct sbp2scsi_host_info *hi, struct scsi_id_instance_data *scsi_id)
- {
- SBP2_DEBUG("sbp2_max_speed_and_size");
- /* Initial setting comes from the hosts speed map */
- scsi_id->speed_code = hi->host->speed_map[(hi->host->node_id & NODE_MASK) * 64
- + (scsi_id->ne->nodeid & NODE_MASK)];
- /* Bump down our speed if the user requested it */
- if (scsi_id->speed_code > sbp2_max_speed) {
- scsi_id->speed_code = sbp2_max_speed;
- SBP2_ERR("Forcing SBP-2 max speed down to %s",
- hpsb_speedto_str[scsi_id->speed_code]);
- }
- /* Payload size is the lesser of what our speed supports and what
- * our host supports. */
- scsi_id->max_payload_size = min(sbp2_speedto_maxrec[scsi_id->speed_code],
- (u8)(((be32_to_cpu(hi->host->csr.rom[2]) >> 12) & 0xf) - 1));
- SBP2_ERR("Node[" NODE_BUS_FMT "]: Max speed [%s] - Max payload [%u]",
- NODE_BUS_ARGS(scsi_id->ne->nodeid), hpsb_speedto_str[scsi_id->speed_code],
- 1 << ((u32)scsi_id->max_payload_size + 2));
- return(0);
- }
- /*
- * This function is called in order to perform a SBP-2 agent reset.
- */
- static int sbp2_agent_reset(struct sbp2scsi_host_info *hi, struct scsi_id_instance_data *scsi_id, u32 flags)
- {
- struct sbp2_request_packet *agent_reset_request_packet;
- SBP2_DEBUG("sbp2_agent_reset");
- /*
- * Ok, let's write to the target's management agent register
- */
- agent_reset_request_packet =
- sbp2util_allocate_write_request_packet(hi, scsi_id->ne,
- scsi_id->sbp2_command_block_agent_addr +
- SBP2_AGENT_RESET_OFFSET,
- 0, ntohl(SBP2_AGENT_RESET_DATA));
- if (!agent_reset_request_packet) {
- SBP2_ERR("sbp2util_allocate_write_request_packet failed");
- return(-EIO);
- }
- if (!hpsb_send_packet(agent_reset_request_packet->packet)) {
- SBP2_ERR("hpsb_send_packet failed");
- sbp2util_free_request_packet(agent_reset_request_packet);
- return(-EIO);
- }
- if (!(flags & SBP2_SEND_NO_WAIT)) {
- down(&agent_reset_request_packet->packet->state_change);
- down(&agent_reset_request_packet->packet->state_change);
- }
- /*
- * Need to make sure orb pointer is written on next command
- */
- scsi_id->last_orb = NULL;
- return(0);
- }
- /*
- * This function is called to create the actual command orb and s/g list
- * out of the scsi command itself.
- */
- static int sbp2_create_command_orb(struct sbp2scsi_host_info *hi,
- struct scsi_id_instance_data *scsi_id,
- struct sbp2_command_info *command,
- unchar *scsi_cmd,
- unsigned int scsi_use_sg,
- unsigned int scsi_request_bufflen,
- void *scsi_request_buffer,
- unsigned char scsi_dir)
- {
- struct scatterlist *sgpnt = (struct scatterlist *) scsi_request_buffer;
- struct sbp2_command_orb *command_orb = &command->command_orb;
- struct sbp2_unrestricted_page_table *scatter_gather_element =
- &command->scatter_gather_element[0];
- int dma_dir = scsi_to_pci_dma_dir (scsi_dir);
- u32 sg_count, sg_len, orb_direction;
- dma_addr_t sg_addr;
- int i;
- /*
- * Set-up our command ORB..
- *
- * NOTE: We're doing unrestricted page tables (s/g), as this is
- * best performance (at least with the devices I have). This means
- * that data_size becomes the number of s/g elements, and
- * page_size should be zero (for unrestricted).
- */
- command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
- command_orb->next_ORB_lo = 0x0;
- command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size);
- command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code);
- command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */
- /*
- * Get the direction of the transfer. If the direction is unknown, then use our
- * goofy table as a back-up.
- */
- switch (scsi_dir) {
- case SCSI_DATA_NONE:
- orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
- break;
- case SCSI_DATA_WRITE:
- orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
- break;
- case SCSI_DATA_READ:
- orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
- break;
- case SCSI_DATA_UNKNOWN:
- default:
- SBP2_ERR("SCSI data transfer direction not specified. "
- "Update the SBP2 direction table in sbp2.h if "
- "necessary for your application");
- print_command (scsi_cmd);
- orb_direction = sbp2scsi_direction_table[*scsi_cmd];
- break;
- }
- /*
- * Set-up our pagetable stuff... unfortunately, this has become
- * messier than I'd like. Need to clean this up a bit. ;-)
- */
- if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
- SBP2_DEBUG("No data transfer");
- /*
- * Handle no data transfer
- */
- command_orb->data_descriptor_hi = 0x0;
- command_orb->data_descriptor_lo = 0x0;
- command_orb->misc |= ORB_SET_DIRECTION(1);
- } else if (scsi_use_sg) {
- SBP2_DEBUG("Use scatter/gather");
- /*
- * Special case if only one element (and less than 64KB in size)
- */
- if ((scsi_use_sg == 1) && (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
- SBP2_DEBUG("Only one s/g element");
- command->dma_dir = dma_dir;
- command->dma_size = sgpnt[0].length;
- command->dma_type = CMD_DMA_PAGE;
- #if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,13)
- command->cmd_dma = pci_map_single (hi->host->pdev, sgpnt[0].address,
- command->dma_size,
- command->dma_dir);
- #else
- command->cmd_dma = pci_map_page(hi->host->pdev,
- sgpnt[0].page,
- sgpnt[0].offset,
- command->dma_size,
- command->dma_dir);
- #endif /* Linux version < 2.4.13 */
- SBP2_DMA_ALLOC("single page scatter element");
- command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
- command_orb->data_descriptor_lo = command->cmd_dma;
- command_orb->misc |= ORB_SET_DATA_SIZE(command->dma_size);
- command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
- } else {
- int count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, dma_dir);
- SBP2_DMA_ALLOC("scatter list");
- command->dma_size = scsi_use_sg;
- command->dma_dir = dma_dir;
- command->sge_buffer = sgpnt;
- /* use page tables (s/g) */
- command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
- command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
- command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
- command_orb->data_descriptor_lo = command->sge_dma;
- /*
- * Loop through and fill out our sbp-2 page tables
- * (and split up anything too large)
- */
- for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
- sg_len = sg_dma_len(sgpnt);
- sg_addr = sg_dma_address(sgpnt);
- while (sg_len) {
- scatter_gather_element[sg_count].segment_base_lo = sg_addr;
- if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
- scatter_gather_element[sg_count].length_segment_base_hi =
- PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
- sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
- sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
- } else {
- scatter_gather_element[sg_count].length_segment_base_hi =
- PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
- sg_len = 0;
- }
- sg_count++;
- }
- }
- /* Number of page table (s/g) elements */
- command_orb->misc |= ORB_SET_DATA_SIZE(sg_count);
- sbp2util_packet_dump(scatter_gather_element,
- (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
- "sbp2 s/g list", command->sge_dma);
- /*
- * Byte swap page tables if necessary
- */
- sbp2util_cpu_to_be32_buffer(scatter_gather_element,
- (sizeof(struct sbp2_unrestricted_page_table)) *
- sg_count);
- }
- } else {
- SBP2_DEBUG("No scatter/gather");
- command->dma_dir = dma_dir;
- command->dma_size = scsi_request_bufflen;
- command->dma_type = CMD_DMA_SINGLE;
- command->cmd_dma = pci_map_single (hi->host->pdev, scsi_request_buffer,
- command->dma_size,
- command->dma_dir);
- SBP2_DMA_ALLOC("single bulk");
- /*
- * Handle case where we get a command w/o s/g enabled (but
- * check for transfers larger than 64K)
- */
- if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
- command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
- command_orb->data_descriptor_lo = command->cmd_dma;
- command_orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
- command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
- /*
- * Sanity, in case our direction table is not
- * up-to-date
- */
- if (!scsi_request_bufflen) {
- command_orb->data_descriptor_hi = 0x0;
- command_orb->data_descriptor_lo = 0x0;
- command_orb->misc |= ORB_SET_DIRECTION(1);
- }
- } else {
- /*
- * Need to turn this into page tables, since the
- * buffer is too large.
- */
- command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
- command_orb->data_descriptor_lo = command->sge_dma;
- /* Use page tables (s/g) */
- command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
- command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
- /*
- * fill out our sbp-2 page tables (and split up
- * the large buffer)
- */
- sg_count = 0;
- sg_len = scsi_request_bufflen;
- sg_addr = command->cmd_dma;
- while (sg_len) {
- scatter_gather_element[sg_count].segment_base_lo = sg_addr;
- if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
- scatter_gather_element[sg_count].length_segment_base_hi =
- PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
- sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
- sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
- } else {
- scatter_gather_element[sg_count].length_segment_base_hi =
- PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
- sg_len = 0;
- }
- sg_count++;
- }
- /* Number of page table (s/g) elements */
- command_orb->misc |= ORB_SET_DATA_SIZE(sg_count);
- sbp2util_packet_dump(scatter_gather_element,
- (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
- "sbp2 s/g list", command->sge_dma);
- /*
- * Byte swap page tables if necessary
- */
- sbp2util_cpu_to_be32_buffer(scatter_gather_element,
- (sizeof(struct sbp2_unrestricted_page_table)) *
- sg_count);
- }
- }
- /*
- * Byte swap command ORB if necessary
- */
- sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb));
- /*
- * Put our scsi command in the command ORB
- */
- memset(command_orb->cdb, 0, 12);
- memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
- return(0);
- }
-
- /*
- * This function is called in order to begin a regular SBP-2 command.
- */
- static int sbp2_link_orb_command(struct sbp2scsi_host_info *hi, struct scsi_id_instance_data *scsi_id,
- struct sbp2_command_info *command)
- {
- struct sbp2_request_packet *command_request_packet;
- struct sbp2_command_orb *command_orb = &command->command_orb;
- outstanding_orb_incr;
- SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
- command_orb, global_outstanding_command_orbs);
- pci_dma_sync_single(hi->host->pdev, command->command_orb_dma,
- sizeof(struct sbp2_command_orb),
- PCI_DMA_BIDIRECTIONAL);
- pci_dma_sync_single(hi->host->pdev, command->sge_dma,
- sizeof(command->scatter_gather_element),
- PCI_DMA_BIDIRECTIONAL);
- /*
- * Check to see if there are any previous orbs to use
- */
- if (scsi_id->last_orb == NULL) {
-
- /*
- * Ok, let's write to the target's management agent register
- */
- if (hpsb_node_entry_valid(scsi_id->ne)) {
- command_request_packet =
- sbp2util_allocate_write_request_packet(hi, scsi_id->ne,
- scsi_id->sbp2_command_block_agent_addr +
- SBP2_ORB_POINTER_OFFSET, 8, 0);
-
- if (!command_request_packet) {
- SBP2_ERR("sbp2util_allocate_write_request_packet failed");
- return(-EIO);
- }
-
- command_request_packet->packet->data[0] = ORB_SET_NODE_ID(hi->host->node_id);
- command_request_packet->packet->data[1] = command->command_orb_dma;
- sbp2util_cpu_to_be32_buffer(command_request_packet->packet->data, 8);
-
- SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb);
- if (!hpsb_send_packet(command_request_packet->packet)) {
- SBP2_ERR("hpsb_send_packet failed");
- sbp2util_free_request_packet(command_request_packet);
- return(-EIO);
- }
- SBP2_ORB_DEBUG("write command agent complete");
- }
- scsi_id->last_orb = command_orb;
- scsi_id->last_orb_dma = command->command_orb_dma;
- } else {
- /*
- * We have an orb already sent (maybe or maybe not
- * processed) that we can append this orb to. So do so,
- * and ring the doorbell. Have to be very careful
- * modifying these next orb pointers, as they are accessed
- * both by the sbp2 device and us.
- */
- scsi_id->last_orb->next_ORB_lo =
- cpu_to_be32(command->command_orb_dma);
- /* Tells hardware that this pointer is valid */
- scsi_id->last_orb->next_ORB_hi = 0x0;
- pci_dma_sync_single(hi->host->pdev, scsi_id->last_orb_dma,
- sizeof(struct sbp2_command_orb),
- PCI_DMA_BIDIRECTIONAL);
- /*
- * Ring the doorbell
- */
- if (hpsb_node_entry_valid(scsi_id->ne)) {
- command_request_packet = sbp2util_allocate_write_request_packet(hi,
- scsi_id->ne,
- scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET,
- 0, cpu_to_be32(command->command_orb_dma));
-
- if (!command_request_packet) {
- SBP2_ERR("sbp2util_allocate_write_request_packet failed");
- return(-EIO);
- }
- SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb);
- if (!hpsb_send_packet(command_request_packet->packet)) {
- SBP2_ERR("hpsb_send_packet failed");
- sbp2util_free_request_packet(command_request_packet);
- return(-EIO);
- }
- }
- scsi_id->last_orb = command_orb;
- scsi_id->last_orb_dma = command->command_orb_dma;
- }
- return(0);
- }
- /*
- * This function is called in order to begin a regular SBP-2 command.
- */
- static int sbp2_send_command(struct sbp2scsi_host_info *hi, struct scsi_id_instance_data *scsi_id,
- Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
- {
- unchar *cmd = (unchar *) SCpnt->cmnd;
- unsigned int request_bufflen = SCpnt->request_bufflen;
- struct sbp2_command_info *command;
- SBP2_DEBUG("sbp2_send_command");
- #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
- printk("[scsi command]n ");
- print_command (cmd);
- #endif
- SBP2_DEBUG("SCSI transfer size = %x", request_bufflen);
- SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg);
- /*
- * Allocate a command orb and s/g structure
- */
- command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done, hi);
- if (!command) {
- return(-EIO);
- }
- /*
- * The scsi stack sends down a request_bufflen which does not match the
- * length field in the scsi cdb. This causes some sbp2 devices to
- * reject this inquiry command. Fix the request_bufflen.
- */
- if (*cmd == INQUIRY) {
- if (sbp2_force_inquiry_hack || scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK)
- request_bufflen = cmd[4] = 0x24;
- else
- request_bufflen = cmd[4];
- }
- /*
- * Now actually fill in the comamnd orb and sbp2 s/g list
- */
- sbp2_create_command_orb(hi, scsi_id, command, cmd, SCpnt->use_sg,
- request_bufflen, SCpnt->request_buffer,
- SCpnt->sc_data_direction);
- /*
- * Update our cdb if necessary (to handle sbp2 RBC command set
- * differences). This is where the command set hacks go! =)
- */
- sbp2_check_sbp2_command(scsi_id, command->command_orb.cdb);
- sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb),
- "sbp2 command orb", command->command_orb_dma);
- /*
- * Initialize status fifo
- */
- memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
- /*
- * Link up the orb, and ring the doorbell if needed
- */
- sbp2_link_orb_command(hi, scsi_id, command);
-
- return(0);
- }
- /*
- * This function deals with command set differences between Linux scsi
- * command set and sbp2 RBC command set.
- */
- static void sbp2_check_sbp2_command(struct scsi_id_instance_data *scsi_id, unchar *cmd)
- {
- unchar new_cmd[16];
- u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun);
- SBP2_DEBUG("sbp2_check_sbp2_command");
- switch (*cmd) {
-
- case READ_6:
- if (sbp2_command_conversion_device_type(device_type)) {
- SBP2_DEBUG("Convert READ_6 to READ_10");
-
- /*
- * Need to turn read_6 into read_10
- */
- new_cmd[0] = 0x28;
- new_cmd[1] = (cmd[1] & 0xe0);
- new_cmd[2] = 0x0;
- new_cmd[3] = (cmd[1] & 0x1f);
- new_cmd[4] = cmd[2];
- new_cmd[5] = cmd[3];
- new_cmd[6] = 0x0;
- new_cmd[7] = 0x0;
- new_cmd[8] = cmd[4];
- new_cmd[9] = cmd[5];
-
- memcpy(cmd, new_cmd, 10);
- }
- break;
- case WRITE_6:
- if (sbp2_command_conversion_device_type(device_type)) {
- SBP2_DEBUG("Convert WRITE_6 to WRITE_10");
-
- /*
- * Need to turn write_6 into write_10
- */
- new_cmd[0] = 0x2a;
- new_cmd[1] = (cmd[1] & 0xe0);
- new_cmd[2] = 0x0;
- new_cmd[3] = (cmd[1] & 0x1f);
- new_cmd[4] = cmd[2];
- new_cmd[5] = cmd[3];
- new_cmd[6] = 0x0;
- new_cmd[7] = 0x0;
- new_cmd[8] = cmd[4];
- new_cmd[9] = cmd[5];
-
- memcpy(cmd, new_cmd, 10);
- }
- break;
- case MODE_SENSE:
- if (sbp2_command_conversion_device_type(device_type)) {
- SBP2_DEBUG("Convert MODE_SENSE_6 to MODE_SENSE_10");
- /*
- * Need to turn mode_sense_6 into mode_sense_10
- */
- new_cmd[0] = 0x5a;
- new_cmd[1] = cmd[1];
- new_cmd[2] = cmd[2];
- new_cmd[3] = 0x0;
- new_cmd[4] = 0x0;
- new_cmd[5] = 0x0;
- new_cmd[6] = 0x0;
- new_cmd[7] = 0x0;
- new_cmd[8] = cmd[4];
- new_cmd[9] = cmd[5];
-
- memcpy(cmd, new_cmd, 10);
- }
- break;
- case MODE_SELECT:
- /*
- * TODO. Probably need to change mode select to 10 byte version
- */
- default:
- break;
- }
- return;
- }
- /*
- * Translates SBP-2 status into SCSI sense data for check conditions
- */
- static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data)
- {
- SBP2_DEBUG("sbp2_status_to_sense_data");
- /*
- * Ok, it's pretty ugly... ;-)
- */
- sense_data[0] = 0x70;
- sense_data[1] = 0x0;
- sense_data[2] = sbp2_status[9];
- sense_data[3] = sbp2_status[12];
- sense_data[4] = sbp2_status[13];
- sense_data[5] = sbp2_status[14];
- sense_data[6] = sbp2_status[15];
- sense_data[7] = 10;
- sense_data[8] = sbp2_status[16];
- sense_data[9] = sbp2_status[17];
- sense_data[10] = sbp2_status[18];
- sense_data[11] = sbp2_status[19];
- sense_data[12] = sbp2_status[10];
- sense_data[13] = sbp2_status[11];
- sense_data[14] = sbp2_status[20];
- sense_data[15] = sbp2_status[21];
- return(sbp2_status[8] & 0x3f); /* return scsi status */
- }
- /*
- * This function is called after a command is completed, in order to do any necessary SBP-2
- * response data translations for the SCSI stack
- */
- static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
- Scsi_Cmnd *SCpnt)
- {
- u8 *scsi_buf = SCpnt->request_buffer;
- u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun);
- SBP2_DEBUG("sbp2_check_sbp2_response");
- switch (SCpnt->cmnd[0]) {
-
- case INQUIRY:
- /*
- * If scsi_id->sbp2_device_type_and_lun is uninitialized, then fill
- * this information in from the inquiry response data. Lun is set to zero.
- */
- if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
- SBP2_DEBUG("Creating sbp2_device_type_and_lun from scsi inquiry data");
- scsi_id->sbp2_device_type_and_lun = (scsi_buf[0] & 0x1f) << 16;
- }
- /*
- * Make sure data length is ok. Minimum length is 36 bytes
- */
- if (scsi_buf[4] == 0) {
- scsi_buf[4] = 36 - 5;
- }
- /*
- * Check for Simple Direct Access Device and change it to TYPE_DISK
- */
- if ((scsi_buf[0] & 0x1f) == TYPE_SDAD) {
- SBP2_DEBUG("Changing TYPE_SDAD to TYPE_DISK");
- scsi_buf[0] &= 0xe0;
- }
- /*
- * Fix ansi revision and response data format
- */
- scsi_buf[2] |= 2;
- scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2;
- break;
- case MODE_SENSE:
- if (sbp2_command_conversion_device_type(device_type)) {
-
- SBP2_DEBUG("Modify mode sense response (10 byte version)");
- scsi_buf[0] = scsi_buf[1]; /* Mode data length */
- scsi_buf[1] = scsi_buf[2]; /* Medium type */
- scsi_buf[2] = scsi_buf[3]; /* Device specific parameter */
- scsi_buf[3] = scsi_buf[7]; /* Block descriptor length */
- memcpy(scsi_buf + 4, scsi_buf + 8, scsi_buf[0]);
-
- }
- break;
- case MODE_SELECT:
- /*
- * TODO. Probably need to change mode select to 10 byte version
- */
- default:
- break;
- }
- return;
- }
- /*
- * This function deals with status writes from the SBP-2 device
- */
- static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid,
- quadlet_t *data, u64 addr, unsigned int length)
- {
- struct sbp2scsi_host_info *hi = NULL;
- struct scsi_id_instance_data *scsi_id = NULL;
- u32 id;
- unsigned long flags;
- Scsi_Cmnd *SCpnt = NULL;
- u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
- struct sbp2_command_info *command;
- SBP2_DEBUG("sbp2_handle_status_write");
- sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr);
- if (!host) {
- SBP2_ERR("host is NULL - this is bad!");
- return(RCODE_ADDRESS_ERROR);
- }
- sbp2_spin_lock(&sbp2_host_info_lock, flags);
- hi = sbp2_find_host_info(host);
- sbp2_spin_unlock(&sbp2_host_info_lock, flags);
- if (!hi) {
- SBP2_ERR("host info is NULL - this is bad!");
- return(RCODE_ADDRESS_ERROR);
- }
- sbp2_spin_lock(&hi->sbp2_command_lock, flags);
- /*
- * Find our scsi_id structure by looking at the status fifo address written to by
- * the sbp2 device.
- */
- id = SBP2_STATUS_FIFO_OFFSET_TO_ENTRY((u32)(addr - SBP2_STATUS_FIFO_ADDRESS));
- scsi_id = hi->scsi_id[id];
- if (!scsi_id) {
- SBP2_ERR("scsi_id is NULL - device is gone?");
- sbp2_spin_unlock(&hi->sbp2_command_lock, flags);
- return(RCODE_ADDRESS_ERROR);
- }
- /*
- * Put response into scsi_id status fifo...
- */
- memcpy(&scsi_id->status_block, data, length);
- /*
- * Byte swap first two quadlets (8 bytes) of status for processing
- */
- sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8);
- /*
- * Handle command ORB status here if necessary. First, need to match status with command.
- */
- command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo);
- if (command) {
- SBP2_DEBUG("Found status for command ORB");
- pci_dma_sync_single(hi->host->pdev, command->command_orb_dma,
- sizeof(struct sbp2_command_orb),
- PCI_DMA_BIDIRECTIONAL);
- pci_dma_sync_single(hi->host->pdev, command->sge_dma,
- sizeof(command->scatter_gather_element),
- PCI_DMA_BIDIRECTIONAL);
- SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb);
- outstanding_orb_decr;
- /*
- * Matched status with command, now grab scsi command pointers and check status
- */
- SCpnt = command->Current_SCpnt;
- sbp2util_mark_command_completed(scsi_id, command);
- if (SCpnt) {
- /*
- * See if the target stored any scsi status information
- */
- if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) {
- /*
- * Translate SBP-2 status to SCSI sense data
- */
- SBP2_DEBUG("CHECK CONDITION");
- scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer);
- }
- /*
- * Check to see if the dead bit is set. If so, we'll have to initiate
- * a fetch agent reset.
- */
- if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) {
- /*
- * Initiate a fetch agent reset.
- */
- SBP2_DEBUG("Dead bit set - initiating fetch agent reset");
- sbp2_agent_reset(hi, scsi_id, SBP2_SEND_NO_WAIT);
- }
- SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb);
- /*
- * Complete the SCSI command
- */
- SBP2_DEBUG("Completing SCSI command");
- sbp2scsi_complete_command(hi, scsi_id, scsi_status, SCpnt, command->Current_done);
- SBP2_ORB_DEBUG("command orb completed");
- }
- /*
- * Check here to see if there are no commands in-use. If there are none, we can
- * null out last orb so that next time around we write directly to the orb pointer...
- * Quick start saves one 1394 bus transaction.
- */
- if (list_empty(&scsi_id->sbp2_command_orb_inuse)) {
- scsi_id->last_orb = NULL;
- }
- } else {
-
- /*
- * It's probably a login/logout/reconnect status.
- */
- if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
- (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
- (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) {
- atomic_set(&scsi_id->sbp2_login_complete, 1);
- }
- }
- sbp2_spin_unlock(&hi->sbp2_command_lock, flags);
- return(RCODE_COMPLETE);
- }
- /**************************************
- * SCSI interface related section
- **************************************/
- /*
- * This routine is the main request entry routine for doing I/O. It is
- * called from the scsi stack directly.
- */
- static int sbp2scsi_queuecommand (Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
- {
- struct sbp2scsi_host_info *hi = NULL;
- struct scsi_id_instance_data *scsi_id = NULL;
- unsigned long flags;
- SBP2_DEBUG("sbp2scsi_queuecommand");
- /*
- * Pull our host info and scsi id instance data from the scsi command
- */
- hi = (struct sbp2scsi_host_info *) SCpnt->host->hostdata[0];
- if (!hi) {
- SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
- SCpnt->result = DID_NO_CONNECT << 16;
- done (SCpnt);
- return(0);
- }
- scsi_id = hi->scsi_id[SCpnt->target];
- /*
- * If scsi_id is null, it means there is no device in this slot,
- * so we should return selection timeout.
- */
- if (!scsi_id) {
- SCpnt->result = DID_NO_CONNECT << 16;
- done (SCpnt);
- return(0);
- }
- /*
- * Until we handle multiple luns, just return selection time-out
- * to any IO directed at non-zero LUNs
- */
- if (SCpnt->lun) {
- SCpnt->result = DID_NO_CONNECT << 16;
- done (SCpnt);
- return(0);
- }
- /*
- * Check for request sense command, and handle it here
- * (autorequest sense)
- */
- if (SCpnt->cmnd[0] == REQUEST_SENSE) {
- SBP2_DEBUG("REQUEST_SENSE");
- memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen);
- memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
- sbp2scsi_complete_command(hi, scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done);
- return(0);
- }
- /*
- * Check to see if we are in the middle of a bus reset.
- */
- if (!hpsb_node_entry_valid(scsi_id->ne)) {
- SBP2_ERR("Bus reset in progress - rejecting command");
- SCpnt->result = DID_BUS_BUSY << 16;
- done (SCpnt);
- return(0);
- }
- /*
- * Try and send our SCSI command
- */
- sbp2_spin_lock(&hi->sbp2_command_lock, flags);
- if (sbp2_send_command(hi, scsi_id, SCpnt, done)) {
- SBP2_ERR("Error sending SCSI command");
- sbp2scsi_complete_command(hi, scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT, SCpnt, done);
- }
- sbp2_spin_unlock(&hi->sbp2_command_lock, flags);
- return(0);
- }
- /*
- * This function is called in order to complete all outstanding SBP-2
- * commands (in case of resets, etc.).
- */
- static void sbp2scsi_complete_all_commands(struct sbp2scsi_host_info *hi,
- struct scsi_id_instance_data *scsi_id,
- u32 status)
- {
- struct list_head *lh;
- struct sbp2_command_info *command;
- SBP2_DEBUG("sbp2_complete_all_commands");
- while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
- SBP2_DEBUG("Found pending command to complete");
- lh = scsi_id->sbp2_command_orb_inuse.next;
- command = list_entry(lh, struct sbp2_command_info, list);
- pci_dma_sync_single(hi->host->pdev, command->command_orb_dma,
- sizeof(struct sbp2_command_orb),
- PCI_DMA_BIDIRECTIONAL);
- pci_dma_sync_single(hi->host->pdev, command->sge_dma,
- sizeof(command->scatter_gather_element),
- PCI_DMA_BIDIRECTIONAL);
- sbp2util_mark_command_completed(scsi_id, command);
- if (command->Current_SCpnt) {
- void (*done)(Scsi_Cmnd *) = command->Current_done;
- command->Current_SCpnt->result = status << 16;
- done (command->Current_SCpnt);
- }
- }
- return;
- }
- /*
- * This function is called in order to complete a regular SBP-2 command.
- */
- static void sbp2scsi_complete_command(struct sbp2scsi_host_info *hi, struct scsi_id_instance_data *scsi_id, u32 scsi_status,
- Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
- {
- SBP2_DEBUG("sbp2scsi_complete_command");
- /*
- * Sanity
- */
- if (!SCpnt) {
- SBP2_ERR("SCpnt is NULL");
- return;
- }
- /*
- * If a bus reset is in progress and there was an error, don't
- * complete the command, just let it get retried at the end of the
- * bus reset.
- */
- if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
- SBP2_ERR("Bus reset in progress - retry command later");
- return;
- }
-
- /*
- * Switch on scsi status
- */
- switch (scsi_status) {
- case SBP2_SCSI_STATUS_GOOD:
- SCpnt->result = DID_OK;
- break;
- case SBP2_SCSI_STATUS_BUSY:
- SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
- SCpnt->result = DID_BUS_BUSY << 16;
- break;
- case SBP2_SCSI_STATUS_CHECK_CONDITION:
- SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
- SCpnt->result = CHECK_CONDITION << 1;
- /*
- * Debug stuff
- */
- #if CONFIG_IEEE1394_SBP2_DEBUG >= 1
- print_command (SCpnt->cmnd);
- print_sense("bh", SCpnt);
- #endif
- break;
- case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
- SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
- SCpnt->result = DID_NO_CONNECT << 16;
- print_command (SCpnt->cmnd);
- break;
- case SBP2_SCSI_STATUS_CONDITION_MET:
- case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
- case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
- SBP2_ERR("Bad SCSI status = %x", scsi_status);
- SCpnt->result = DID_ERROR << 16;
- print_command (SCpnt->cmnd);
- break;
- default:
- SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
- SCpnt->result = DID_ERROR << 16;
- }
- /*
- * Take care of any sbp2 response data mucking here (RBC stuff, etc.)
- */
- if (SCpnt->result == DID_OK) {
- sbp2_check_sbp2_response(scsi_id, SCpnt);
- }
- /*
- * If a bus reset is in progress and there was an error, complete
- * the command as busy so that it will get retried.
- */
- if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
- SBP2_ERR("Completing command with busy (bus reset)");
- SCpnt->result = DID_BUS_BUSY << 16;
- }
- /*
- * If a unit attention occurs, return busy status so it gets
- * retried... it could have happened because of a 1394 bus reset
- * or hot-plug...
- */
- #if 0
- if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) &&
- (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) {
- SBP2_DEBUG("UNIT ATTENTION - return busy");
- SCpnt->result = DID_BUS_BUSY << 16;
- }
- #endif
- /*
- * Tell scsi stack that we're done with this command
- */
- #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
- spin_lock_irq(&io_request_lock);
- done (SCpnt);
- spin_unlock_irq(&io_request_lock);
- #else
- spin_lock_irq(hi->scsi_host->host_lock);
- done (SCpnt);
- spin_unlock_irq(hi->scsi_host->host_lock);
- #endif
- return;
- }
- /*
- * Called by scsi stack when something has really gone wrong. Usually
- * called when a command has timed-out for some reason.
- */
- static int sbp2scsi_abort (Scsi_Cmnd *SCpnt)
- {
- struct sbp2scsi_host_info *hi = (struct sbp2scsi_host_info *) SCpnt->host->hostdata[0];
- struct scsi_id_instance_data *scsi_id = hi->scsi_id[SCpnt->target];
- struct sbp2_command_info *command;
- unsigned long flags;
- SBP2_ERR("aborting sbp2 command");
- print_command (SCpnt->cmnd);
-
- if (scsi_id) {
- /*
- * Right now, just return any matching command structures
- * to the free pool.
- */
- sbp2_spin_lock(&hi->sbp2_command_lock, flags);
- command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt);
- if (command) {
- SBP2_DEBUG("Found command to abort");
- pci_dma_sync_single(hi->host->pdev,
- command->command_orb_dma,
- sizeof(struct sbp2_command_orb),
- PCI_DMA_BIDIRECTIONAL);
- pci_dma_sync_single(hi->host->pdev,
- command->sge_dma,
- sizeof(command->scatter_gather_element),
- PCI_DMA_BIDIRECTIONAL);
- sbp2util_mark_command_completed(scsi_id, command);
- if (command->Current_SCpnt) {
- void (*done)(Scsi_Cmnd *) = command->Current_done;
- command->Current_SCpnt->result = DID_ABORT << 16;
- done (command->Current_SCpnt);
- }
- }
- /*
- * Initiate a fetch agent reset.
- */
- sbp2_agent_reset(hi, scsi_id, SBP2_SEND_NO_WAIT);
- sbp2scsi_complete_all_commands(hi, scsi_id, DID_BUS_BUSY);
- sbp2_spin_unlock(&hi->sbp2_command_lock, flags);
- }
- return(SUCCESS);
- }
- /*
- * Called by scsi stack when something has really gone wrong.
- */
- static int sbp2scsi_reset (Scsi_Cmnd *SCpnt)
- {
- struct sbp2scsi_host_info *hi = (struct sbp2scsi_host_info *) SCpnt->host->hostdata[0];
- struct scsi_id_instance_data *scsi_id = hi->scsi_id[SCpnt->target];
- SBP2_ERR("reset requested");
- if (scsi_id) {
- SBP2_ERR("Generating sbp2 fetch agent reset");
- sbp2_agent_reset(hi, scsi_id, SBP2_SEND_NO_WAIT);
- }
- return(SUCCESS);
- }
- /*
- * Called by scsi stack to get bios parameters (used by fdisk, and at boot).
- */
- #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,28)
- static int sbp2scsi_biosparam (Scsi_Disk *disk, kdev_t dev, int geom[])
- #else
- static int sbp2scsi_biosparam (Scsi_Disk *disk, struct block_device *dev, int geom[])
- #endif
- {
- int heads, sectors, cylinders;
- SBP2_DEBUG("Request for bios parameters");
- heads = 64;
- sectors = 32;
- cylinders = disk->capacity / (heads * sectors);
- if (cylinders > 1024) {
- heads = 255;
- sectors = 63;
- cylinders = disk->capacity / (heads * sectors);
- }
- geom[0] = heads;
- geom[1] = sectors;
- geom[2] = cylinders;
- return(0);
- }
- /*
- * Called by scsi stack after scsi driver is registered
- */
- static int sbp2scsi_detect (Scsi_Host_Template *tpnt)
- {
- SBP2_DEBUG("sbp2scsi_detect");
- /*
- * Call sbp2_init to register with the ieee1394 stack. This
- * results in a callback to sbp2_add_host for each ieee1394
- * host controller currently registered, and for each of those
- * we register a scsi host with the scsi stack.
- */
-
- #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
- spin_unlock_irq(&io_request_lock);
- sbp2_init();
- spin_lock_irq(&io_request_lock);
- #else
- sbp2_init();
- #endif
- /* We return the number of hosts registered. */
- return scsi_driver_template.present;
- }
- /*
- * Called for contents of procfs
- */
- static const char *sbp2scsi_info (struct Scsi_Host *host)
- {
- struct sbp2scsi_host_info *hi = sbp2_find_host_info_scsi(host);
- static char info[1024];
- if (!hi) /* shouldn't happen, but... */
- return "IEEE-1394 SBP-2 protocol driver";
- sprintf(info, "IEEE-1394 SBP-2 protocol driver (host: %s)n%sn"
- "SBP-2 module load options:n"
- "- Max speed supported: %sn"
- "- Max sectors per I/O supported: %dn"
- "- Max outstanding commands supported: %dn"
- "- Max outstanding commands per lun supported: %dn"
- "- Serialized I/O (debug): %sn"
- "- Exclusive login: %s",
- hi->host->driver->name,
- version,
- hpsb_speedto_str[sbp2_max_speed],
- sbp2_max_sectors,
- sbp2_max_outstanding_cmds,
- sbp2_max_cmds_per_lun,
- sbp2_serialize_io ? "yes" : "no",
- sbp2_exclusive_login ? "yes" : "no");
- return info;
- }
- MODULE_AUTHOR("James Goodwin <jamesg@filanet.com>");
- MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
- MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
- MODULE_LICENSE("GPL");
- /* SCSI host template */
- static Scsi_Host_Template scsi_driver_template = {
- .name = "IEEE-1394 SBP-2 protocol driver",
- .info = sbp2scsi_info,
- .detect = sbp2scsi_detect,
- .queuecommand = sbp2scsi_queuecommand,
- .eh_abort_handler = sbp2scsi_abort,
- .eh_device_reset_handler =sbp2scsi_reset,
- .eh_bus_reset_handler = sbp2scsi_reset,
- .eh_host_reset_handler =sbp2scsi_reset,
- .bios_param = sbp2scsi_biosparam,
- .this_id = -1,
- .sg_tablesize = SBP2_MAX_SG_ELEMENTS,
- .use_clustering = SBP2_CLUSTERING,
- #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
- .use_new_eh_code = TRUE,
- #endif
- .emulated = 1,
- .proc_name = SBP2_DEVICE_NAME,
- };
- static int sbp2_module_init(void)
- {
- SBP2_DEBUG("sbp2_module_init");
- /*
- * Module load debug option to force one command at a time (serializing I/O)
- */
- if (sbp2_serialize_io) {
- SBP2_ERR("Driver forced to serialize I/O (serialize_io = 1)");
- scsi_driver_template.can_queue = 1;
- scsi_driver_template.cmd_per_lun = 1;
- } else {
- scsi_driver_template.can_queue = sbp2_max_outstanding_cmds;
- scsi_driver_template.cmd_per_lun = sbp2_max_cmds_per_lun;
- }
- /*
- * Set max sectors (module load option). Default is 255 sectors.
- */
- scsi_driver_template.max_sectors = sbp2_max_sectors;
- /*
- * Ideally we would register our scsi_driver_template with the
- * scsi stack and after that register with the ieee1394 stack
- * and process the add_host callbacks. However, the detect
- * function in the scsi host template requires that we find at
- * least one host, so we "nest" the registrations by calling
- * sbp2_init from the detect function.
- */
- scsi_driver_template.module = THIS_MODULE;
- if (SCSI_REGISTER_HOST(&scsi_driver_template) ||
- !scsi_driver_template.present) {
- SBP2_ERR("Please load the lower level IEEE-1394 driver "
- "(e.g. ohci1394) before sbp2...");
- sbp2_cleanup();
- return -ENODEV;
- }
- return 0;
- }
- static void __exit sbp2_module_exit(void)
- {
- SBP2_DEBUG("sbp2_module_exit");
- /*
- * On module unload we unregister with the ieee1394 stack
- * which results in remove_host callbacks for all ieee1394
- * host controllers. In the callbacks we unregister the
- * corresponding scsi hosts.
- */
- sbp2_cleanup();
- if (SCSI_UNREGISTER_HOST(&scsi_driver_template))
- SBP2_ERR("sbp2_module_exit: couldn't unregister scsi driver");
- }
- module_init(sbp2_module_init);
- module_exit(sbp2_module_exit);