firewire: rename source files

The source files of firewire-core, firewire-ohci, firewire-sbp2, i.e.
 "drivers/firewire/fw-*.c"
are renamed to
 "drivers/firewire/core-*.c",
 "drivers/firewire/ohci.c",
 "drivers/firewire/sbp2.c".

The old fw- prefix was redundant to the directory name.  The new core-
prefix distinguishes the files according to which driver they belong to.

This change comes a little late, but still before further firewire
drivers are added as anticipated RSN.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

1 files changed, 0 insertions, 1651 deletions

diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
deleted file mode 100644
index d41cb6e455bc..000000000000
--- a/drivers/firewire/fw-sbp2.c
+++ /dev/null
@@ -1,1651 +0,0 @@
-/*
- * SBP2 driver (SCSI over IEEE1394)
- *
- * Copyright (C) 2005-2007  Kristian Hoegsberg <krh@bitplanet.net>
- *
- * 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.
- */
-
-/*
- * The basic structure of this driver is based on the old storage driver,
- * drivers/ieee1394/sbp2.c, originally written by
- *     James Goodwin <jamesg@filanet.com>
- * with later contributions and ongoing maintenance from
- *     Ben Collins <bcollins@debian.org>,
- *     Stefan Richter <stefanr@s5r6.in-berlin.de>
- * and many others.
- */
-
-#include <linux/blkdev.h>
-#include <linux/bug.h>
-#include <linux/completion.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/dma-mapping.h>
-#include <linux/firewire.h>
-#include <linux/firewire-constants.h>
-#include <linux/init.h>
-#include <linux/jiffies.h>
-#include <linux/kernel.h>
-#include <linux/kref.h>
-#include <linux/list.h>
-#include <linux/mod_devicetable.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/scatterlist.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/string.h>
-#include <linux/stringify.h>
-#include <linux/workqueue.h>
-
-#include <asm/byteorder.h>
-#include <asm/system.h>
-
-#include <scsi/scsi.h>
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_device.h>
-#include <scsi/scsi_host.h>
-
-/*
- * So far only bridges from Oxford Semiconductor are known to support
- * concurrent logins. Depending on firmware, four or two concurrent logins
- * are possible on OXFW911 and newer Oxsemi bridges.
- *
- * Concurrent logins are useful together with cluster filesystems.
- */
-static int sbp2_param_exclusive_login = 1;
-module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644);
-MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
-		 "(default = Y, use N for concurrent initiators)");
-
-/*
- * Flags for firmware oddities
- *
- * - 128kB max transfer
- *   Limit transfer size. Necessary for some old bridges.
- *
- * - 36 byte inquiry
- *   When scsi_mod probes the device, let the inquiry command look like that
- *   from MS Windows.
- *
- * - skip mode page 8
- *   Suppress sending of mode_sense for mode page 8 if the device pretends to
- *   support the SCSI Primary Block commands instead of Reduced Block Commands.
- *
- * - fix capacity
- *   Tell sd_mod to correct the last sector number reported by read_capacity.
- *   Avoids access beyond actual disk limits on devices with an off-by-one bug.
- *   Don't use this with devices which don't have this bug.
- *
- * - delay inquiry
- *   Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry.
- *
- * - power condition
- *   Set the power condition field in the START STOP UNIT commands sent by
- *   sd_mod on suspend, resume, and shutdown (if manage_start_stop is on).
- *   Some disks need this to spin down or to resume properly.
- *
- * - override internal blacklist
- *   Instead of adding to the built-in blacklist, use only the workarounds
- *   specified in the module load parameter.
- *   Useful if a blacklist entry interfered with a non-broken device.
- */
-#define SBP2_WORKAROUND_128K_MAX_TRANS	0x1
-#define SBP2_WORKAROUND_INQUIRY_36	0x2
-#define SBP2_WORKAROUND_MODE_SENSE_8	0x4
-#define SBP2_WORKAROUND_FIX_CAPACITY	0x8
-#define SBP2_WORKAROUND_DELAY_INQUIRY	0x10
-#define SBP2_INQUIRY_DELAY		12
-#define SBP2_WORKAROUND_POWER_CONDITION	0x20
-#define SBP2_WORKAROUND_OVERRIDE	0x100
-
-static int sbp2_param_workarounds;
-module_param_named(workarounds, sbp2_param_workarounds, int, 0644);
-MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
-	", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
-	", 36 byte inquiry = "    __stringify(SBP2_WORKAROUND_INQUIRY_36)
-	", skip mode page 8 = "   __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
-	", fix capacity = "       __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
-	", delay inquiry = "      __stringify(SBP2_WORKAROUND_DELAY_INQUIRY)
-	", set power condition in start stop unit = "
-				  __stringify(SBP2_WORKAROUND_POWER_CONDITION)
-	", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
-	", or a combination)");
-
-/* I don't know why the SCSI stack doesn't define something like this... */
-typedef void (*scsi_done_fn_t)(struct scsi_cmnd *);
-
-static const char sbp2_driver_name[] = "sbp2";
-
-/*
- * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry
- * and one struct scsi_device per sbp2_logical_unit.
- */
-struct sbp2_logical_unit {
-	struct sbp2_target *tgt;
-	struct list_head link;
-	struct fw_address_handler address_handler;
-	struct list_head orb_list;
-
-	u64 command_block_agent_address;
-	u16 lun;
-	int login_id;
-
-	/*
-	 * The generation is updated once we've logged in or reconnected
-	 * to the logical unit.  Thus, I/O to the device will automatically
-	 * fail and get retried if it happens in a window where the device
-	 * is not ready, e.g. after a bus reset but before we reconnect.
-	 */
-	int generation;
-	int retries;
-	struct delayed_work work;
-	bool has_sdev;
-	bool blocked;
-};
-
-/*
- * We create one struct sbp2_target per IEEE 1212 Unit Directory
- * and one struct Scsi_Host per sbp2_target.
- */
-struct sbp2_target {
-	struct kref kref;
-	struct fw_unit *unit;
-	const char *bus_id;
-	struct list_head lu_list;
-
-	u64 management_agent_address;
-	u64 guid;
-	int directory_id;
-	int node_id;
-	int address_high;
-	unsigned int workarounds;
-	unsigned int mgt_orb_timeout;
-	unsigned int max_payload;
-
-	int dont_block;	/* counter for each logical unit */
-	int blocked;	/* ditto */
-};
-
-/* Impossible login_id, to detect logout attempt before successful login */
-#define INVALID_LOGIN_ID 0x10000
-
-/*
- * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be
- * provided in the config rom. Most devices do provide a value, which
- * we'll use for login management orbs, but with some sane limits.
- */
-#define SBP2_MIN_LOGIN_ORB_TIMEOUT	5000U	/* Timeout in ms */
-#define SBP2_MAX_LOGIN_ORB_TIMEOUT	40000U	/* Timeout in ms */
-#define SBP2_ORB_TIMEOUT		2000U	/* Timeout in ms */
-#define SBP2_ORB_NULL			0x80000000
-#define SBP2_RETRY_LIMIT		0xf		/* 15 retries */
-#define SBP2_CYCLE_LIMIT		(0xc8 << 12)	/* 200 125us cycles */
-
-/*
- * The default maximum s/g segment size of a FireWire controller is
- * usually 0x10000, but SBP-2 only allows 0xffff. Since buffers have to
- * be quadlet-aligned, we set the length limit to 0xffff & ~3.
- */
-#define SBP2_MAX_SEG_SIZE		0xfffc
-
-/* Unit directory keys */
-#define SBP2_CSR_UNIT_CHARACTERISTICS	0x3a
-#define SBP2_CSR_FIRMWARE_REVISION	0x3c
-#define SBP2_CSR_LOGICAL_UNIT_NUMBER	0x14
-#define SBP2_CSR_LOGICAL_UNIT_DIRECTORY	0xd4
-
-/* Management orb opcodes */
-#define SBP2_LOGIN_REQUEST		0x0
-#define SBP2_QUERY_LOGINS_REQUEST	0x1
-#define SBP2_RECONNECT_REQUEST		0x3
-#define SBP2_SET_PASSWORD_REQUEST	0x4
-#define SBP2_LOGOUT_REQUEST		0x7
-#define SBP2_ABORT_TASK_REQUEST		0xb
-#define SBP2_ABORT_TASK_SET		0xc
-#define SBP2_LOGICAL_UNIT_RESET		0xe
-#define SBP2_TARGET_RESET_REQUEST	0xf
-
-/* Offsets for command block agent registers */
-#define SBP2_AGENT_STATE		0x00
-#define SBP2_AGENT_RESET		0x04
-#define SBP2_ORB_POINTER		0x08
-#define SBP2_DOORBELL			0x10
-#define SBP2_UNSOLICITED_STATUS_ENABLE	0x14
-
-/* Status write response codes */
-#define SBP2_STATUS_REQUEST_COMPLETE	0x0
-#define SBP2_STATUS_TRANSPORT_FAILURE	0x1
-#define SBP2_STATUS_ILLEGAL_REQUEST	0x2
-#define SBP2_STATUS_VENDOR_DEPENDENT	0x3
-
-#define STATUS_GET_ORB_HIGH(v)		((v).status & 0xffff)
-#define STATUS_GET_SBP_STATUS(v)	(((v).status >> 16) & 0xff)
-#define STATUS_GET_LEN(v)		(((v).status >> 24) & 0x07)
-#define STATUS_GET_DEAD(v)		(((v).status >> 27) & 0x01)
-#define STATUS_GET_RESPONSE(v)		(((v).status >> 28) & 0x03)
-#define STATUS_GET_SOURCE(v)		(((v).status >> 30) & 0x03)
-#define STATUS_GET_ORB_LOW(v)		((v).orb_low)
-#define STATUS_GET_DATA(v)		((v).data)
-
-struct sbp2_status {
-	u32 status;
-	u32 orb_low;
-	u8 data[24];
-};
-
-struct sbp2_pointer {
-	__be32 high;
-	__be32 low;
-};
-
-struct sbp2_orb {
-	struct fw_transaction t;
-	struct kref kref;
-	dma_addr_t request_bus;
-	int rcode;
-	struct sbp2_pointer pointer;
-	void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status);
-	struct list_head link;
-};
-
-#define MANAGEMENT_ORB_LUN(v)			((v))
-#define MANAGEMENT_ORB_FUNCTION(v)		((v) << 16)
-#define MANAGEMENT_ORB_RECONNECT(v)		((v) << 20)
-#define MANAGEMENT_ORB_EXCLUSIVE(v)		((v) ? 1 << 28 : 0)
-#define MANAGEMENT_ORB_REQUEST_FORMAT(v)	((v) << 29)
-#define MANAGEMENT_ORB_NOTIFY			((1) << 31)
-
-#define MANAGEMENT_ORB_RESPONSE_LENGTH(v)	((v))
-#define MANAGEMENT_ORB_PASSWORD_LENGTH(v)	((v) << 16)
-
-struct sbp2_management_orb {
-	struct sbp2_orb base;
-	struct {
-		struct sbp2_pointer password;
-		struct sbp2_pointer response;
-		__be32 misc;
-		__be32 length;
-		struct sbp2_pointer status_fifo;
-	} request;
-	__be32 response[4];
-	dma_addr_t response_bus;
-	struct completion done;
-	struct sbp2_status status;
-};
-
-struct sbp2_login_response {
-	__be32 misc;
-	struct sbp2_pointer command_block_agent;
-	__be32 reconnect_hold;
-};
-#define COMMAND_ORB_DATA_SIZE(v)	((v))
-#define COMMAND_ORB_PAGE_SIZE(v)	((v) << 16)
-#define COMMAND_ORB_PAGE_TABLE_PRESENT	((1) << 19)
-#define COMMAND_ORB_MAX_PAYLOAD(v)	((v) << 20)
-#define COMMAND_ORB_SPEED(v)		((v) << 24)
-#define COMMAND_ORB_DIRECTION		((1) << 27)
-#define COMMAND_ORB_REQUEST_FORMAT(v)	((v) << 29)
-#define COMMAND_ORB_NOTIFY		((1) << 31)
-
-struct sbp2_command_orb {
-	struct sbp2_orb base;
-	struct {
-		struct sbp2_pointer next;
-		struct sbp2_pointer data_descriptor;
-		__be32 misc;
-		u8 command_block[12];
-	} request;
-	struct scsi_cmnd *cmd;
-	scsi_done_fn_t done;
-	struct sbp2_logical_unit *lu;
-
-	struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8)));
-	dma_addr_t page_table_bus;
-};
-
-#define SBP2_ROM_VALUE_WILDCARD ~0         /* match all */
-#define SBP2_ROM_VALUE_MISSING  0xff000000 /* not present in the unit dir. */
-
-/*
- * List of devices with known bugs.
- *
- * The firmware_revision field, masked with 0xffff00, is the best
- * indicator for the type of bridge chip of a device.  It yields a few
- * false positives but this did not break correctly behaving devices
- * so far.
- */
-static const struct {
-	u32 firmware_revision;
-	u32 model;
-	unsigned int workarounds;
-} sbp2_workarounds_table[] = {
-	/* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
-		.firmware_revision	= 0x002800,
-		.model			= 0x001010,
-		.workarounds		= SBP2_WORKAROUND_INQUIRY_36 |
-					  SBP2_WORKAROUND_MODE_SENSE_8 |
-					  SBP2_WORKAROUND_POWER_CONDITION,
-	},
-	/* DViCO Momobay FX-3A with TSB42AA9A bridge */ {
-		.firmware_revision	= 0x002800,
-		.model			= 0x000000,
-		.workarounds		= SBP2_WORKAROUND_DELAY_INQUIRY |
-					  SBP2_WORKAROUND_POWER_CONDITION,
-	},
-	/* Initio bridges, actually only needed for some older ones */ {
-		.firmware_revision	= 0x000200,
-		.model			= SBP2_ROM_VALUE_WILDCARD,
-		.workarounds		= SBP2_WORKAROUND_INQUIRY_36,
-	},
-	/* PL-3507 bridge with Prolific firmware */ {
-		.firmware_revision	= 0x012800,
-		.model			= SBP2_ROM_VALUE_WILDCARD,
-		.workarounds		= SBP2_WORKAROUND_POWER_CONDITION,
-	},
-	/* Symbios bridge */ {
-		.firmware_revision	= 0xa0b800,
-		.model			= SBP2_ROM_VALUE_WILDCARD,
-		.workarounds		= SBP2_WORKAROUND_128K_MAX_TRANS,
-	},
-	/* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ {
-		.firmware_revision	= 0x002600,
-		.model			= SBP2_ROM_VALUE_WILDCARD,
-		.workarounds		= SBP2_WORKAROUND_128K_MAX_TRANS,
-	},
-	/*
-	 * iPod 2nd generation: needs 128k max transfer size workaround
-	 * iPod 3rd generation: needs fix capacity workaround
-	 */
-	{
-		.firmware_revision	= 0x0a2700,
-		.model			= 0x000000,
-		.workarounds		= SBP2_WORKAROUND_128K_MAX_TRANS |
-					  SBP2_WORKAROUND_FIX_CAPACITY,
-	},
-	/* iPod 4th generation */ {
-		.firmware_revision	= 0x0a2700,
-		.model			= 0x000021,
-		.workarounds		= SBP2_WORKAROUND_FIX_CAPACITY,
-	},
-	/* iPod mini */ {
-		.firmware_revision	= 0x0a2700,
-		.model			= 0x000022,
-		.workarounds		= SBP2_WORKAROUND_FIX_CAPACITY,
-	},
-	/* iPod mini */ {
-		.firmware_revision	= 0x0a2700,
-		.model			= 0x000023,
-		.workarounds		= SBP2_WORKAROUND_FIX_CAPACITY,
-	},
-	/* iPod Photo */ {
-		.firmware_revision	= 0x0a2700,
-		.model			= 0x00007e,
-		.workarounds		= SBP2_WORKAROUND_FIX_CAPACITY,
-	}
-};
-
-static void free_orb(struct kref *kref)
-{
-	struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref);
-
-	kfree(orb);
-}
-
-static void sbp2_status_write(struct fw_card *card, struct fw_request *request,
-			      int tcode, int destination, int source,
-			      int generation, int speed,
-			      unsigned long long offset,
-			      void *payload, size_t length, void *callback_data)
-{
-	struct sbp2_logical_unit *lu = callback_data;
-	struct sbp2_orb *orb;
-	struct sbp2_status status;
-	size_t header_size;
-	unsigned long flags;
-
-	if (tcode != TCODE_WRITE_BLOCK_REQUEST ||
-	    length == 0 || length > sizeof(status)) {
-		fw_send_response(card, request, RCODE_TYPE_ERROR);
-		return;
-	}
-
-	header_size = min(length, 2 * sizeof(u32));
-	fw_memcpy_from_be32(&status, payload, header_size);
-	if (length > header_size)
-		memcpy(status.data, payload + 8, length - header_size);
-	if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) {
-		fw_notify("non-orb related status write, not handled\n");
-		fw_send_response(card, request, RCODE_COMPLETE);
-		return;
-	}
-
-	/* Lookup the orb corresponding to this status write. */
-	spin_lock_irqsave(&card->lock, flags);
-	list_for_each_entry(orb, &lu->orb_list, link) {
-		if (STATUS_GET_ORB_HIGH(status) == 0 &&
-		    STATUS_GET_ORB_LOW(status) == orb->request_bus) {
-			orb->rcode = RCODE_COMPLETE;
-			list_del(&orb->link);
-			break;
-		}
-	}
-	spin_unlock_irqrestore(&card->lock, flags);
-
-	if (&orb->link != &lu->orb_list)
-		orb->callback(orb, &status);
-	else
-		fw_error("status write for unknown orb\n");
-
-	kref_put(&orb->kref, free_orb);
-
-	fw_send_response(card, request, RCODE_COMPLETE);
-}
-
-static void complete_transaction(struct fw_card *card, int rcode,
-				 void *payload, size_t length, void *data)
-{
-	struct sbp2_orb *orb = data;
-	unsigned long flags;
-
-	/*
-	 * This is a little tricky.  We can get the status write for
-	 * the orb before we get this callback.  The status write
-	 * handler above will assume the orb pointer transaction was
-	 * successful and set the rcode to RCODE_COMPLETE for the orb.
-	 * So this callback only sets the rcode if it hasn't already
-	 * been set and only does the cleanup if the transaction
-	 * failed and we didn't already get a status write.
-	 */
-	spin_lock_irqsave(&card->lock, flags);
-
-	if (orb->rcode == -1)
-		orb->rcode = rcode;
-	if (orb->rcode != RCODE_COMPLETE) {
-		list_del(&orb->link);
-		spin_unlock_irqrestore(&card->lock, flags);
-		orb->callback(orb, NULL);
-	} else {
-		spin_unlock_irqrestore(&card->lock, flags);
-	}
-
-	kref_put(&orb->kref, free_orb);
-}
-
-static void sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu,
-			  int node_id, int generation, u64 offset)
-{
-	struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
-	unsigned long flags;
-
-	orb->pointer.high = 0;
-	orb->pointer.low = cpu_to_be32(orb->request_bus);
-
-	spin_lock_irqsave(&device->card->lock, flags);
-	list_add_tail(&orb->link, &lu->orb_list);
-	spin_unlock_irqrestore(&device->card->lock, flags);
-
-	/* Take a ref for the orb list and for the transaction callback. */
-	kref_get(&orb->kref);
-	kref_get(&orb->kref);
-
-	fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST,
-			node_id, generation, device->max_speed, offset,
-			&orb->pointer, sizeof(orb->pointer),
-			complete_transaction, orb);
-}
-
-static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu)
-{
-	struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
-	struct sbp2_orb *orb, *next;
-	struct list_head list;
-	unsigned long flags;
-	int retval = -ENOENT;
-
-	INIT_LIST_HEAD(&list);
-	spin_lock_irqsave(&device->card->lock, flags);
-	list_splice_init(&lu->orb_list, &list);
-	spin_unlock_irqrestore(&device->card->lock, flags);
-
-	list_for_each_entry_safe(orb, next, &list, link) {
-		retval = 0;
-		if (fw_cancel_transaction(device->card, &orb->t) == 0)
-			continue;
-
-		orb->rcode = RCODE_CANCELLED;
-		orb->callback(orb, NULL);
-	}
-
-	return retval;
-}
-
-static void complete_management_orb(struct sbp2_orb *base_orb,
-				    struct sbp2_status *status)
-{
-	struct sbp2_management_orb *orb =
-		container_of(base_orb, struct sbp2_management_orb, base);
-
-	if (status)
-		memcpy(&orb->status, status, sizeof(*status));
-	complete(&orb->done);
-}
-
-static int sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id,
-				    int generation, int function,
-				    int lun_or_login_id, void *response)
-{
-	struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
-	struct sbp2_management_orb *orb;
-	unsigned int timeout;
-	int retval = -ENOMEM;
-
-	if (function == SBP2_LOGOUT_REQUEST && fw_device_is_shutdown(device))
-		return 0;
-
-	orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
-	if (orb == NULL)
-		return -ENOMEM;
-
-	kref_init(&orb->base.kref);
-	orb->response_bus =
-		dma_map_single(device->card->device, &orb->response,
-			       sizeof(orb->response), DMA_FROM_DEVICE);
-	if (dma_mapping_error(device->card->device, orb->response_bus))
-		goto fail_mapping_response;
-
-	orb->request.response.high = 0;
-	orb->request.response.low  = cpu_to_be32(orb->response_bus);
-
-	orb->request.misc = cpu_to_be32(
-		MANAGEMENT_ORB_NOTIFY |
-		MANAGEMENT_ORB_FUNCTION(function) |
-		MANAGEMENT_ORB_LUN(lun_or_login_id));
-	orb->request.length = cpu_to_be32(
-		MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response)));
-
-	orb->request.status_fifo.high =
-		cpu_to_be32(lu->address_handler.offset >> 32);
-	orb->request.status_fifo.low  =
-		cpu_to_be32(lu->address_handler.offset);
-
-	if (function == SBP2_LOGIN_REQUEST) {
-		/* Ask for 2^2 == 4 seconds reconnect grace period */
-		orb->request.misc |= cpu_to_be32(
-			MANAGEMENT_ORB_RECONNECT(2) |
-			MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login));
-		timeout = lu->tgt->mgt_orb_timeout;
-	} else {
-		timeout = SBP2_ORB_TIMEOUT;
-	}
-
-	init_completion(&orb->done);
-	orb->base.callback = complete_management_orb;
-
-	orb->base.request_bus =
-		dma_map_single(device->card->device, &orb->request,
-			       sizeof(orb->request), DMA_TO_DEVICE);
-	if (dma_mapping_error(device->card->device, orb->base.request_bus))
-		goto fail_mapping_request;
-
-	sbp2_send_orb(&orb->base, lu, node_id, generation,
-		      lu->tgt->management_agent_address);
-
-	wait_for_completion_timeout(&orb->done, msecs_to_jiffies(timeout));
-
-	retval = -EIO;
-	if (sbp2_cancel_orbs(lu) == 0) {
-		fw_error("%s: orb reply timed out, rcode=0x%02x\n",
-			 lu->tgt->bus_id, orb->base.rcode);
-		goto out;
-	}
-
-	if (orb->base.rcode != RCODE_COMPLETE) {
-		fw_error("%s: management write failed, rcode 0x%02x\n",
-			 lu->tgt->bus_id, orb->base.rcode);
-		goto out;
-	}
-
-	if (STATUS_GET_RESPONSE(orb->status) != 0 ||
-	    STATUS_GET_SBP_STATUS(orb->status) != 0) {
-		fw_error("%s: error status: %d:%d\n", lu->tgt->bus_id,
-			 STATUS_GET_RESPONSE(orb->status),
-			 STATUS_GET_SBP_STATUS(orb->status));
-		goto out;
-	}
-
-	retval = 0;
- out:
-	dma_unmap_single(device->card->device, orb->base.request_bus,
-			 sizeof(orb->request), DMA_TO_DEVICE);
- fail_mapping_request:
-	dma_unmap_single(device->card->device, orb->response_bus,
-			 sizeof(orb->response), DMA_FROM_DEVICE);
- fail_mapping_response:
-	if (response)
-		memcpy(response, orb->response, sizeof(orb->response));
-	kref_put(&orb->base.kref, free_orb);
-
-	return retval;
-}
-
-static void sbp2_agent_reset(struct sbp2_logical_unit *lu)
-{
-	struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
-	__be32 d = 0;
-
-	fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST,
-			   lu->tgt->node_id, lu->generation, device->max_speed,
-			   lu->command_block_agent_address + SBP2_AGENT_RESET,
-			   &d, sizeof(d));
-}
-
-static void complete_agent_reset_write_no_wait(struct fw_card *card,
-		int rcode, void *payload, size_t length, void *data)
-{
-	kfree(data);
-}
-
-static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu)
-{
-	struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
-	struct fw_transaction *t;
-	static __be32 d;
-
-	t = kmalloc(sizeof(*t), GFP_ATOMIC);
-	if (t == NULL)
-		return;
-
-	fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST,
-			lu->tgt->node_id, lu->generation, device->max_speed,
-			lu->command_block_agent_address + SBP2_AGENT_RESET,
-			&d, sizeof(d), complete_agent_reset_write_no_wait, t);
-}
-
-static inline void sbp2_allow_block(struct sbp2_logical_unit *lu)
-{
-	/*
-	 * We may access dont_block without taking card->lock here:
-	 * All callers of sbp2_allow_block() and all callers of sbp2_unblock()
-	 * are currently serialized against each other.
-	 * And a wrong result in sbp2_conditionally_block()'s access of
-	 * dont_block is rather harmless, it simply misses its first chance.
-	 */
-	--lu->tgt->dont_block;
-}
-
-/*
- * Blocks lu->tgt if all of the following conditions are met:
- *   - Login, INQUIRY, and high-level SCSI setup of all of the target's
- *     logical units have been finished (indicated by dont_block == 0).
- *   - lu->generation is stale.
- *
- * Note, scsi_block_requests() must be called while holding card->lock,
- * otherwise it might foil sbp2_[conditionally_]unblock()'s attempt to
- * unblock the target.
- */
-static void sbp2_conditionally_block(struct sbp2_logical_unit *lu)
-{
-	struct sbp2_target *tgt = lu->tgt;
-	struct fw_card *card = fw_device(tgt->unit->device.parent)->card;
-	struct Scsi_Host *shost =
-		container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
-	unsigned long flags;
-
-	spin_lock_irqsave(&card->lock, flags);
-	if (!tgt->dont_block && !lu->blocked &&
-	    lu->generation != card->generation) {
-		lu->blocked = true;
-		if (++tgt->blocked == 1)
-			scsi_block_requests(shost);
-	}
-	spin_unlock_irqrestore(&card->lock, flags);
-}
-
-/*
- * Unblocks lu->tgt as soon as all its logical units can be unblocked.
- * Note, it is harmless to run scsi_unblock_requests() outside the
- * card->lock protected section.  On the other hand, running it inside
- * the section might clash with shost->host_lock.
- */
-static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu)
-{
-	struct sbp2_target *tgt = lu->tgt;
-	struct fw_card *card = fw_device(tgt->unit->device.parent)->card;
-	struct Scsi_Host *shost =
-		container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
-	unsigned long flags;
-	bool unblock = false;
-
-	spin_lock_irqsave(&card->lock, flags);
-	if (lu->blocked && lu->generation == card->generation) {
-		lu->blocked = false;
-		unblock = --tgt->blocked == 0;
-	}
-	spin_unlock_irqrestore(&card->lock, flags);
-
-	if (unblock)
-		scsi_unblock_requests(shost);
-}
-
-/*
- * Prevents future blocking of tgt and unblocks it.
- * Note, it is harmless to run scsi_unblock_requests() outside the
- * card->lock protected section.  On the other hand, running it inside
- * the section might clash with shost->host_lock.
- */
-static void sbp2_unblock(struct sbp2_target *tgt)
-{
-	struct fw_card *card = fw_device(tgt->unit->device.parent)->card;
-	struct Scsi_Host *shost =
-		container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
-	unsigned long flags;
-
-	spin_lock_irqsave(&card->lock, flags);
-	++tgt->dont_block;
-	spin_unlock_irqrestore(&card->lock, flags);
-
-	scsi_unblock_requests(shost);
-}
-
-static int sbp2_lun2int(u16 lun)
-{
-	struct scsi_lun eight_bytes_lun;
-
-	memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun));
-	eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff;
-	eight_bytes_lun.scsi_lun[1] = lun & 0xff;
-
-	return scsilun_to_int(&eight_bytes_lun);
-}
-
-static void sbp2_release_target(struct kref *kref)
-{
-	struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref);
-	struct sbp2_logical_unit *lu, *next;
-	struct Scsi_Host *shost =
-		container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
-	struct scsi_device *sdev;
-	struct fw_device *device = fw_device(tgt->unit->device.parent);
-
-	/* prevent deadlocks */
-	sbp2_unblock(tgt);
-
-	list_for_each_entry_safe(lu, next, &tgt->lu_list, link) {
-		sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun));
-		if (sdev) {
-			scsi_remove_device(sdev);
-			scsi_device_put(sdev);
-		}
-		if (lu->login_id != INVALID_LOGIN_ID) {
-			int generation, node_id;
-			/*
-			 * tgt->node_id may be obsolete here if we failed
-			 * during initial login or after a bus reset where
-			 * the topology changed.
-			 */
-			generation = device->generation;
-			smp_rmb(); /* node_id vs. generation */
-			node_id    = device->node_id;
-			sbp2_send_management_orb(lu, node_id, generation,
-						 SBP2_LOGOUT_REQUEST,
-						 lu->login_id, NULL);
-		}
-		fw_core_remove_address_handler(&lu->address_handler);
-		list_del(&lu->link);
-		kfree(lu);
-	}
-	scsi_remove_host(shost);
-	fw_notify("released %s, target %d:0:0\n", tgt->bus_id, shost->host_no);
-
-	fw_unit_put(tgt->unit);
-	scsi_host_put(shost);
-	fw_device_put(device);
-}
-
-static struct workqueue_struct *sbp2_wq;
-
-static void sbp2_target_put(struct sbp2_target *tgt)
-{
-	kref_put(&tgt->kref, sbp2_release_target);
-}
-
-/*
- * Always get the target's kref when scheduling work on one its units.
- * Each workqueue job is responsible to call sbp2_target_put() upon return.
- */
-static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay)
-{
-	kref_get(&lu->tgt->kref);
-	if (!queue_delayed_work(sbp2_wq, &lu->work, delay))
-		sbp2_target_put(lu->tgt);
-}
-
-/*
- * Write retransmit retry values into the BUSY_TIMEOUT register.
- * - The single-phase retry protocol is supported by all SBP-2 devices, but the
- *   default retry_limit value is 0 (i.e. never retry transmission). We write a
- *   saner value after logging into the device.
- * - The dual-phase retry protocol is optional to implement, and if not
- *   supported, writes to the dual-phase portion of the register will be
- *   ignored. We try to write the original 1394-1995 default here.
- * - In the case of devices that are also SBP-3-compliant, all writes are
- *   ignored, as the register is read-only, but contains single-phase retry of
- *   15, which is what we're trying to set for all SBP-2 device anyway, so this
- *   write attempt is safe and yields more consistent behavior for all devices.
- *
- * See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec,
- * and section 6.4 of the SBP-3 spec for further details.
- */
-static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu)
-{
-	struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
-	__be32 d = cpu_to_be32(SBP2_CYCLE_LIMIT | SBP2_RETRY_LIMIT);
-
-	fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST,
-			   lu->tgt->node_id, lu->generation, device->max_speed,
-			   CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT,
-			   &d, sizeof(d));
-}
-
-static void sbp2_reconnect(struct work_struct *work);
-
-static void sbp2_login(struct work_struct *work)
-{
-	struct sbp2_logical_unit *lu =
-		container_of(work, struct sbp2_logical_unit, work.work);
-	struct sbp2_target *tgt = lu->tgt;
-	struct fw_device *device = fw_device(tgt->unit->device.parent);
-	struct Scsi_Host *shost;
-	struct scsi_device *sdev;
-	struct sbp2_login_response response;
-	int generation, node_id, local_node_id;
-
-	if (fw_device_is_shutdown(device))
-		goto out;
-
-	generation    = device->generation;
-	smp_rmb();    /* node IDs must not be older than generation */
-	node_id       = device->node_id;
-	local_node_id = device->card->node_id;
-
-	/* If this is a re-login attempt, log out, or we might be rejected. */
-	if (lu->has_sdev)
-		sbp2_send_management_orb(lu, device->node_id, generation,
-				SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
-
-	if (sbp2_send_management_orb(lu, node_id, generation,
-				SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) {
-		if (lu->retries++ < 5) {
-			sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
-		} else {
-			fw_error("%s: failed to login to LUN %04x\n",
-				 tgt->bus_id, lu->lun);
-			/* Let any waiting I/O fail from now on. */
-			sbp2_unblock(lu->tgt);
-		}
-		goto out;
-	}
-
-	tgt->node_id	  = node_id;
-	tgt->address_high = local_node_id << 16;
-	smp_wmb();	  /* node IDs must not be older than generation */
-	lu->generation	  = generation;
-
-	lu->command_block_agent_address =
-		((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff)
-		      << 32) | be32_to_cpu(response.command_block_agent.low);
-	lu->login_id = be32_to_cpu(response.misc) & 0xffff;
-
-	fw_notify("%s: logged in to LUN %04x (%d retries)\n",
-		  tgt->bus_id, lu->lun, lu->retries);
-
-	/* set appropriate retry limit(s) in BUSY_TIMEOUT register */
-	sbp2_set_busy_timeout(lu);
-
-	PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect);
-	sbp2_agent_reset(lu);
-
-	/* This was a re-login. */
-	if (lu->has_sdev) {
-		sbp2_cancel_orbs(lu);
-		sbp2_conditionally_unblock(lu);
-		goto out;
-	}
-
-	if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY)
-		ssleep(SBP2_INQUIRY_DELAY);
-
-	shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
-	sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu);
-	/*
-	 * FIXME:  We are unable to perform reconnects while in sbp2_login().
-	 * Therefore __scsi_add_device() will get into trouble if a bus reset
-	 * happens in parallel.  It will either fail or leave us with an
-	 * unusable sdev.  As a workaround we check for this and retry the
-	 * whole login and SCSI probing.
-	 */
-
-	/* Reported error during __scsi_add_device() */
-	if (IS_ERR(sdev))
-		goto out_logout_login;
-
-	/* Unreported error during __scsi_add_device() */
-	smp_rmb(); /* get current card generation */
-	if (generation != device->card->generation) {
-		scsi_remove_device(sdev);
-		scsi_device_put(sdev);
-		goto out_logout_login;
-	}
-
-	/* No error during __scsi_add_device() */
-	lu->has_sdev = true;
-	scsi_device_put(sdev);
-	sbp2_allow_block(lu);
-	goto out;
-
- out_logout_login:
-	smp_rmb(); /* generation may have changed */
-	generation = device->generation;
-	smp_rmb(); /* node_id must not be older than generation */
-
-	sbp2_send_management_orb(lu, device->node_id, generation,
-				 SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
-	/*
-	 * If a bus reset happened, sbp2_update will have requeued
-	 * lu->work already.  Reset the work from reconnect to login.
-	 */
-	PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
- out:
-	sbp2_target_put(tgt);
-}
-
-static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry)
-{
-	struct sbp2_logical_unit *lu;
-
-	lu = kmalloc(sizeof(*lu), GFP_KERNEL);
-	if (!lu)
-		return -ENOMEM;
-
-	lu->address_handler.length           = 0x100;
-	lu->address_handler.address_callback = sbp2_status_write;
-	lu->address_handler.callback_data    = lu;
-
-	if (fw_core_add_address_handler(&lu->address_handler,
-					&fw_high_memory_region) < 0) {
-		kfree(lu);
-		return -ENOMEM;
-	}
-
-	lu->tgt      = tgt;
-	lu->lun      = lun_entry & 0xffff;
-	lu->login_id = INVALID_LOGIN_ID;
-	lu->retries  = 0;
-	lu->has_sdev = false;
-	lu->blocked  = false;
-	++tgt->dont_block;
-	INIT_LIST_HEAD(&lu->orb_list);
-	INIT_DELAYED_WORK(&lu->work, sbp2_login);
-
-	list_add_tail(&lu->link, &tgt->lu_list);
-	return 0;
-}
-
-static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory)
-{
-	struct fw_csr_iterator ci;
-	int key, value;
-
-	fw_csr_iterator_init(&ci, directory);
-	while (fw_csr_iterator_next(&ci, &key, &value))
-		if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER &&
-		    sbp2_add_logical_unit(tgt, value) < 0)
-			return -ENOMEM;
-	return 0;
-}
-
-static int sbp2_scan_unit_dir(struct sbp2_target *tgt, u32 *directory,
-			      u32 *model, u32 *firmware_revision)
-{
-	struct fw_csr_iterator ci;
-	int key, value;
-	unsigned int timeout;
-
-	fw_csr_iterator_init(&ci, directory);
-	while (fw_csr_iterator_next(&ci, &key, &value)) {
-		switch (key) {
-
-		case CSR_DEPENDENT_INFO | CSR_OFFSET:
-			tgt->management_agent_address =
-					CSR_REGISTER_BASE + 4 * value;
-			break;
-
-		case CSR_DIRECTORY_ID:
-			tgt->directory_id = value;
-			break;
-
-		case CSR_MODEL:
-			*model = value;
-			break;
-
-		case SBP2_CSR_FIRMWARE_REVISION:
-			*firmware_revision = value;
-			break;
-
-		case SBP2_CSR_UNIT_CHARACTERISTICS:
-			/* the timeout value is stored in 500ms units */
-			timeout = ((unsigned int) value >> 8 & 0xff) * 500;
-			timeout = max(timeout, SBP2_MIN_LOGIN_ORB_TIMEOUT);
-			tgt->mgt_orb_timeout =
-				  min(timeout, SBP2_MAX_LOGIN_ORB_TIMEOUT);
-
-			if (timeout > tgt->mgt_orb_timeout)
-				fw_notify("%s: config rom contains %ds "
-					  "management ORB timeout, limiting "
-					  "to %ds\n", tgt->bus_id,
-					  timeout / 1000,
-					  tgt->mgt_orb_timeout / 1000);
-			break;
-
-		case SBP2_CSR_LOGICAL_UNIT_NUMBER:
-			if (sbp2_add_logical_unit(tgt, value) < 0)
-				return -ENOMEM;
-			break;
-
-		case SBP2_CSR_LOGICAL_UNIT_DIRECTORY:
-			/* Adjust for the increment in the iterator */
-			if (sbp2_scan_logical_unit_dir(tgt, ci.p - 1 + value) < 0)
-				return -ENOMEM;
-			break;
-		}
-	}
-	return 0;
-}
-
-static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model,
-				  u32 firmware_revision)
-{
-	int i;
-	unsigned int w = sbp2_param_workarounds;
-
-	if (w)
-		fw_notify("Please notify linux1394-devel@lists.sourceforge.net "
-			  "if you need the workarounds parameter for %s\n",
-			  tgt->bus_id);
-
-	if (w & SBP2_WORKAROUND_OVERRIDE)
-		goto out;
-
-	for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
-
-		if (sbp2_workarounds_table[i].firmware_revision !=
-		    (firmware_revision & 0xffffff00))
-			continue;
-
-		if (sbp2_workarounds_table[i].model != model &&
-		    sbp2_workarounds_table[i].model != SBP2_ROM_VALUE_WILDCARD)
-			continue;
-
-		w |= sbp2_workarounds_table[i].workarounds;
-		break;
-	}
- out:
-	if (w)
-		fw_notify("Workarounds for %s: 0x%x "
-			  "(firmware_revision 0x%06x, model_id 0x%06x)\n",
-			  tgt->bus_id, w, firmware_revision, model);
-	tgt->workarounds = w;
-}
-
-static struct scsi_host_template scsi_driver_template;
-
-static int sbp2_probe(struct device *dev)
-{
-	struct fw_unit *unit = fw_unit(dev);
-	struct fw_device *device = fw_device(unit->device.parent);
-	struct sbp2_target *tgt;
-	struct sbp2_logical_unit *lu;
-	struct Scsi_Host *shost;
-	u32 model, firmware_revision;
-
-	if (dma_get_max_seg_size(device->card->device) > SBP2_MAX_SEG_SIZE)
-		BUG_ON(dma_set_max_seg_size(device->card->device,
-					    SBP2_MAX_SEG_SIZE));
-
-	shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt));
-	if (shost == NULL)
-		return -ENOMEM;
-
-	tgt = (struct sbp2_target *)shost->hostdata;
-	unit->device.driver_data = tgt;
-	tgt->unit = unit;
-	kref_init(&tgt->kref);
-	INIT_LIST_HEAD(&tgt->lu_list);
-	tgt->bus_id = dev_name(&unit->device);
-	tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
-
-	if (fw_device_enable_phys_dma(device) < 0)
-		goto fail_shost_put;
-
-	if (scsi_add_host(shost, &unit->device) < 0)
-		goto fail_shost_put;
-
-	fw_device_get(device);
-	fw_unit_get(unit);
-
-	/* implicit directory ID */
-	tgt->directory_id = ((unit->directory - device->config_rom) * 4
-			     + CSR_CONFIG_ROM) & 0xffffff;
-
-	firmware_revision = SBP2_ROM_VALUE_MISSING;
-	model		  = SBP2_ROM_VALUE_MISSING;
-
-	if (sbp2_scan_unit_dir(tgt, unit->directory, &model,
-			       &firmware_revision) < 0)
-		goto fail_tgt_put;
-
-	sbp2_init_workarounds(tgt, model, firmware_revision);
-
-	/*
-	 * At S100 we can do 512 bytes per packet, at S200 1024 bytes,
-	 * and so on up to 4096 bytes.  The SBP-2 max_payload field
-	 * specifies the max payload size as 2 ^ (max_payload + 2), so
-	 * if we set this to max_speed + 7, we get the right value.
-	 */
-	tgt->max_payload = min(device->max_speed + 7, 10U);
-	tgt->max_payload = min(tgt->max_payload, device->card->max_receive - 1);
-
-	/* Do the login in a workqueue so we can easily reschedule retries. */
-	list_for_each_entry(lu, &tgt->lu_list, link)
-		sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
-	return 0;
-
- fail_tgt_put:
-	sbp2_target_put(tgt);
-	return -ENOMEM;
-
- fail_shost_put:
-	scsi_host_put(shost);
-	return -ENOMEM;
-}
-
-static int sbp2_remove(struct device *dev)
-{
-	struct fw_unit *unit = fw_unit(dev);
-	struct sbp2_target *tgt = unit->device.driver_data;
-
-	sbp2_target_put(tgt);
-	return 0;
-}
-
-static void sbp2_reconnect(struct work_struct *work)
-{
-	struct sbp2_logical_unit *lu =
-		container_of(work, struct sbp2_logical_unit, work.work);
-	struct sbp2_target *tgt = lu->tgt;
-	struct fw_device *device = fw_device(tgt->unit->device.parent);
-	int generation, node_id, local_node_id;
-
-	if (fw_device_is_shutdown(device))
-		goto out;
-
-	generation    = device->generation;
-	smp_rmb();    /* node IDs must not be older than generation */
-	node_id       = device->node_id;
-	local_node_id = device->card->node_id;
-
-	if (sbp2_send_management_orb(lu, node_id, generation,
-				     SBP2_RECONNECT_REQUEST,
-				     lu->login_id, NULL) < 0) {
-		/*
-		 * If reconnect was impossible even though we are in the
-		 * current generation, fall back and try to log in again.
-		 *
-		 * We could check for "Function rejected" status, but
-		 * looking at the bus generation as simpler and more general.
-		 */
-		smp_rmb(); /* get current card generation */
-		if (generation == device->card->generation ||
-		    lu->retries++ >= 5) {
-			fw_error("%s: failed to reconnect\n", tgt->bus_id);
-			lu->retries = 0;
-			PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
-		}
-		sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
-		goto out;
-	}
-
-	tgt->node_id      = node_id;
-	tgt->address_high = local_node_id << 16;
-	smp_wmb();	  /* node IDs must not be older than generation */
-	lu->generation	  = generation;
-
-	fw_notify("%s: reconnected to LUN %04x (%d retries)\n",
-		  tgt->bus_id, lu->lun, lu->retries);
-
-	sbp2_agent_reset(lu);
-	sbp2_cancel_orbs(lu);
-	sbp2_conditionally_unblock(lu);
- out:
-	sbp2_target_put(tgt);
-}
-
-static void sbp2_update(struct fw_unit *unit)
-{
-	struct sbp2_target *tgt = unit->device.driver_data;
-	struct sbp2_logical_unit *lu;
-
-	fw_device_enable_phys_dma(fw_device(unit->device.parent));
-
-	/*
-	 * Fw-core serializes sbp2_update() against sbp2_remove().
-	 * Iteration over tgt->lu_list is therefore safe here.
-	 */
-	list_for_each_entry(lu, &tgt->lu_list, link) {
-		sbp2_conditionally_block(lu);
-		lu->retries = 0;
-		sbp2_queue_work(lu, 0);
-	}
-}
-
-#define SBP2_UNIT_SPEC_ID_ENTRY	0x0000609e
-#define SBP2_SW_VERSION_ENTRY	0x00010483
-
-static const struct ieee1394_device_id sbp2_id_table[] = {
-	{
-		.match_flags  = IEEE1394_MATCH_SPECIFIER_ID |
-				IEEE1394_MATCH_VERSION,
-		.specifier_id = SBP2_UNIT_SPEC_ID_ENTRY,
-		.version      = SBP2_SW_VERSION_ENTRY,
-	},
-	{ }
-};
-
-static struct fw_driver sbp2_driver = {
-	.driver   = {
-		.owner  = THIS_MODULE,
-		.name   = sbp2_driver_name,
-		.bus    = &fw_bus_type,
-		.probe  = sbp2_probe,
-		.remove = sbp2_remove,
-	},
-	.update   = sbp2_update,
-	.id_table = sbp2_id_table,
-};
-
-static void sbp2_unmap_scatterlist(struct device *card_device,
-				   struct sbp2_command_orb *orb)
-{
-	if (scsi_sg_count(orb->cmd))
-		dma_unmap_sg(card_device, scsi_sglist(orb->cmd),
-			     scsi_sg_count(orb->cmd),
-			     orb->cmd->sc_data_direction);
-
-	if (orb->request.misc & cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT))
-		dma_unmap_single(card_device, orb->page_table_bus,
-				 sizeof(orb->page_table), DMA_TO_DEVICE);
-}
-
-static unsigned int sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data)
-{
-	int sam_status;
-
-	sense_data[0] = 0x70;
-	sense_data[1] = 0x0;
-	sense_data[2] = sbp2_status[1];
-	sense_data[3] = sbp2_status[4];
-	sense_data[4] = sbp2_status[5];
-	sense_data[5] = sbp2_status[6];
-	sense_data[6] = sbp2_status[7];
-	sense_data[7] = 10;
-	sense_data[8] = sbp2_status[8];
-	sense_data[9] = sbp2_status[9];
-	sense_data[10] = sbp2_status[10];
-	sense_data[11] = sbp2_status[11];
-	sense_data[12] = sbp2_status[2];
-	sense_data[13] = sbp2_status[3];
-	sense_data[14] = sbp2_status[12];
-	sense_data[15] = sbp2_status[13];
-
-	sam_status = sbp2_status[0] & 0x3f;
-
-	switch (sam_status) {
-	case SAM_STAT_GOOD:
-	case SAM_STAT_CHECK_CONDITION:
-	case SAM_STAT_CONDITION_MET:
-	case SAM_STAT_BUSY:
-	case SAM_STAT_RESERVATION_CONFLICT:
-	case SAM_STAT_COMMAND_TERMINATED:
-		return DID_OK << 16 | sam_status;
-
-	default:
-		return DID_ERROR << 16;
-	}
-}
-
-static void complete_command_orb(struct sbp2_orb *base_orb,
-				 struct sbp2_status *status)
-{
-	struct sbp2_command_orb *orb =
-		container_of(base_orb, struct sbp2_command_orb, base);
-	struct fw_device *device = fw_device(orb->lu->tgt->unit->device.parent);
-	int result;
-
-	if (status != NULL) {
-		if (STATUS_GET_DEAD(*status))
-			sbp2_agent_reset_no_wait(orb->lu);
-
-		switch (STATUS_GET_RESPONSE(*status)) {
-		case SBP2_STATUS_REQUEST_COMPLETE:
-			result = DID_OK << 16;
-			break;
-		case SBP2_STATUS_TRANSPORT_FAILURE:
-			result = DID_BUS_BUSY << 16;
-			break;
-		case SBP2_STATUS_ILLEGAL_REQUEST:
-		case SBP2_STATUS_VENDOR_DEPENDENT:
-		default:
-			result = DID_ERROR << 16;
-			break;
-		}
-
-		if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1)
-			result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status),
-							   orb->cmd->sense_buffer);
-	} else {
-		/*
-		 * If the orb completes with status == NULL, something
-		 * went wrong, typically a bus reset happened mid-orb
-		 * or when sending the write (less likely).
-		 */
-		result = DID_BUS_BUSY << 16;
-		sbp2_conditionally_block(orb->lu);
-	}
-
-	dma_unmap_single(device->card->device, orb->base.request_bus,
-			 sizeof(orb->request), DMA_TO_DEVICE);
-	sbp2_unmap_scatterlist(device->card->device, orb);
-
-	orb->cmd->result = result;
-	orb->done(orb->cmd);
-}
-
-static int sbp2_map_scatterlist(struct sbp2_command_orb *orb,
-		struct fw_device *device, struct sbp2_logical_unit *lu)
-{
-	struct scatterlist *sg = scsi_sglist(orb->cmd);
-	int i, n;
-
-	n = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd),
-		       orb->cmd->sc_data_direction);
-	if (n == 0)
-		goto fail;
-
-	/*
-	 * Handle the special case where there is only one element in
-	 * the scatter list by converting it to an immediate block
-	 * request. This is also a workaround for broken devices such
-	 * as the second generation iPod which doesn't support page
-	 * tables.
-	 */
-	if (n == 1) {
-		orb->request.data_descriptor.high =
-			cpu_to_be32(lu->tgt->address_high);
-		orb->request.data_descriptor.low  =
-			cpu_to_be32(sg_dma_address(sg));
-		orb->request.misc |=
-			cpu_to_be32(COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)));
-		return 0;
-	}
-
-	for_each_sg(sg, sg, n, i) {
-		orb->page_table[i].high = cpu_to_be32(sg_dma_len(sg) << 16);
-		orb->page_table[i].low = cpu_to_be32(sg_dma_address(sg));
-	}
-
-	orb->page_table_bus =
-		dma_map_single(device->card->device, orb->page_table,
-			       sizeof(orb->page_table), DMA_TO_DEVICE);
-	if (dma_mapping_error(device->card->device, orb->page_table_bus))
-		goto fail_page_table;
-
-	/*
-	 * The data_descriptor pointer is the one case where we need
-	 * to fill in the node ID part of the address.  All other
-	 * pointers assume that the data referenced reside on the
-	 * initiator (i.e. us), but data_descriptor can refer to data
-	 * on other nodes so we need to put our ID in descriptor.high.
-	 */
-	orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high);
-	orb->request.data_descriptor.low  = cpu_to_be32(orb->page_table_bus);
-	orb->request.misc |= cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT |
-					 COMMAND_ORB_DATA_SIZE(n));
-
-	return 0;
-
- fail_page_table:
-	dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd),
-		     scsi_sg_count(orb->cmd), orb->cmd->sc_data_direction);
- fail:
-	return -ENOMEM;
-}
-
-/* SCSI stack integration */
-
-static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
-{
-	struct sbp2_logical_unit *lu = cmd->device->hostdata;
-	struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
-	struct sbp2_command_orb *orb;
-	int generation, retval = SCSI_MLQUEUE_HOST_BUSY;
-
-	/*
-	 * Bidirectional commands are not yet implemented, and unknown
-	 * transfer direction not handled.
-	 */
-	if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) {
-		fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n");
-		cmd->result = DID_ERROR << 16;
-		done(cmd);
-		return 0;
-	}
-
-	orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
-	if (orb == NULL) {
-		fw_notify("failed to alloc orb\n");
-		return SCSI_MLQUEUE_HOST_BUSY;
-	}
-
-	/* Initialize rcode to something not RCODE_COMPLETE. */
-	orb->base.rcode = -1;
-	kref_init(&orb->base.kref);
-
-	orb->lu   = lu;
-	orb->done = done;
-	orb->cmd  = cmd;
-
-	orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL);
-	orb->request.misc = cpu_to_be32(
-		COMMAND_ORB_MAX_PAYLOAD(lu->tgt->max_payload) |
-		COMMAND_ORB_SPEED(device->max_speed) |
-		COMMAND_ORB_NOTIFY);
-
-	if (cmd->sc_data_direction == DMA_FROM_DEVICE)
-		orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION);
-
-	generation = device->generation;
-	smp_rmb();    /* sbp2_map_scatterlist looks at tgt->address_high */
-
-	if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0)
-		goto out;
-
-	memcpy(orb->request.command_block, cmd->cmnd, cmd->cmd_len);
-
-	orb->base.callback = complete_command_orb;
-	orb->base.request_bus =
-		dma_map_single(device->card->device, &orb->request,
-			       sizeof(orb->request), DMA_TO_DEVICE);
-	if (dma_mapping_error(device->card->device, orb->base.request_bus)) {
-		sbp2_unmap_scatterlist(device->card->device, orb);
-		goto out;
-	}
-
-	sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, generation,
-		      lu->command_block_agent_address + SBP2_ORB_POINTER);
-	retval = 0;
- out:
-	kref_put(&orb->base.kref, free_orb);
-	return retval;
-}
-
-static int sbp2_scsi_slave_alloc(struct scsi_device *sdev)
-{
-	struct sbp2_logical_unit *lu = sdev->hostdata;
-
-	/* (Re-)Adding logical units via the SCSI stack is not supported. */
-	if (!lu)
-		return -ENOSYS;
-
-	sdev->allow_restart = 1;
-
-	/* SBP-2 requires quadlet alignment of the data buffers. */
-	blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1);
-
-	if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36)
-		sdev->inquiry_len = 36;
-
-	return 0;
-}
-
-static int sbp2_scsi_slave_configure(struct scsi_device *sdev)
-{
-	struct sbp2_logical_unit *lu = sdev->hostdata;
-
-	sdev->use_10_for_rw = 1;
-
-	if (sbp2_param_exclusive_login)
-		sdev->manage_start_stop = 1;
-
-	if (sdev->type == TYPE_ROM)
-		sdev->use_10_for_ms = 1;
-
-	if (sdev->type == TYPE_DISK &&
-	    lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
-		sdev->skip_ms_page_8 = 1;
-
-	if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
-		sdev->fix_capacity = 1;
-
-	if (lu->tgt->workarounds & SBP2_WORKAROUND_POWER_CONDITION)
-		sdev->start_stop_pwr_cond = 1;
-
-	if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS)
-		blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512);
-
-	blk_queue_max_segment_size(sdev->request_queue, SBP2_MAX_SEG_SIZE);
-
-	return 0;
-}
-
-/*
- * Called by scsi stack when something has really gone wrong.  Usually
- * called when a command has timed-out for some reason.
- */
-static int sbp2_scsi_abort(struct scsi_cmnd *cmd)
-{
-	struct sbp2_logical_unit *lu = cmd->device->hostdata;
-
-	fw_notify("%s: sbp2_scsi_abort\n", lu->tgt->bus_id);
-	sbp2_agent_reset(lu);
-	sbp2_cancel_orbs(lu);
-
-	return SUCCESS;
-}
-
-/*
- * Format of /sys/bus/scsi/devices/.../ieee1394_id:
- * u64 EUI-64 : u24 directory_ID : u16 LUN  (all printed in hexadecimal)
- *
- * This is the concatenation of target port identifier and logical unit
- * identifier as per SAM-2...SAM-4 annex A.
- */
-static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
-			struct device_attribute *attr, char *buf)
-{
-	struct scsi_device *sdev = to_scsi_device(dev);
-	struct sbp2_logical_unit *lu;
-
-	if (!sdev)
-		return 0;
-
-	lu = sdev->hostdata;
-
-	return sprintf(buf, "%016llx:%06x:%04x\n",
-			(unsigned long long)lu->tgt->guid,
-			lu->tgt->directory_id, lu->lun);
-}
-
-static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
-
-static struct device_attribute *sbp2_scsi_sysfs_attrs[] = {
-	&dev_attr_ieee1394_id,
-	NULL
-};
-
-static struct scsi_host_template scsi_driver_template = {
-	.module			= THIS_MODULE,
-	.name			= "SBP-2 IEEE-1394",
-	.proc_name		= sbp2_driver_name,
-	.queuecommand		= sbp2_scsi_queuecommand,
-	.slave_alloc		= sbp2_scsi_slave_alloc,
-	.slave_configure	= sbp2_scsi_slave_configure,
-	.eh_abort_handler	= sbp2_scsi_abort,
-	.this_id		= -1,
-	.sg_tablesize		= SG_ALL,
-	.use_clustering		= ENABLE_CLUSTERING,
-	.cmd_per_lun		= 1,
-	.can_queue		= 1,
-	.sdev_attrs		= sbp2_scsi_sysfs_attrs,
-};
-
-MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
-MODULE_DESCRIPTION("SCSI over IEEE1394");
-MODULE_LICENSE("GPL");
-MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
-
-/* Provide a module alias so root-on-sbp2 initrds don't break. */
-#ifndef CONFIG_IEEE1394_SBP2_MODULE
-MODULE_ALIAS("sbp2");
-#endif
-
-static int __init sbp2_init(void)
-{
-	sbp2_wq = create_singlethread_workqueue(KBUILD_MODNAME);
-	if (!sbp2_wq)
-		return -ENOMEM;
-
-	return driver_register(&sbp2_driver.driver);
-}
-
-static void __exit sbp2_cleanup(void)
-{
-	driver_unregister(&sbp2_driver.driver);
-	destroy_workqueue(sbp2_wq);
-}
-
-module_init(sbp2_init);
-module_exit(sbp2_cleanup);