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Diffstat (limited to 'drivers/ieee1394/sbp2.c')
-rw-r--r--drivers/ieee1394/sbp2.c2138
1 files changed, 0 insertions, 2138 deletions
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
deleted file mode 100644
index d6e251a300ce..000000000000
--- a/drivers/ieee1394/sbp2.c
+++ /dev/null
@@ -1,2138 +0,0 @@
-/*
- * sbp2.c - SBP-2 protocol driver for IEEE-1394
- *
- * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
- * jamesg@filanet.com (JSG)
- *
- * Copyright (C) 2003 Ben Collins <bcollins@debian.org>
- *
- * 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.
- *
- * You may access any attached SBP-2 (usually storage devices) as regular
- * SCSI devices. E.g. mount /dev/sda1, fdisk, mkfs, etc..
- *
- * See http://www.t10.org/drafts.htm#sbp2 for the final draft of the SBP-2
- * specification and for where to purchase the official standard.
- *
- * TODO:
- * - look into possible improvements of the SCSI error handlers
- * - handle Unit_Characteristics.mgt_ORB_timeout and .ORB_size
- * - handle Logical_Unit_Number.ordered
- * - handle src == 1 in status blocks
- * - reimplement the DMA mapping in absence of physical DMA so that
- * bus_to_virt is no longer required
- * - debug the handling of absent physical DMA
- * - replace CONFIG_IEEE1394_SBP2_PHYS_DMA by automatic detection
- * (this is easy but depends on the previous two TODO items)
- * - make the parameter serialize_io configurable per device
- * - move all requests to fetch agent registers into non-atomic context,
- * replace all usages of sbp2util_node_write_no_wait by true transactions
- * Grep for inline FIXME comments below.
- */
-
-#include <linux/blkdev.h>
-#include <linux/compiler.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/dma-mapping.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/stat.h>
-#include <linux/string.h>
-#include <linux/stringify.h>
-#include <linux/types.h>
-#include <linux/wait.h>
-#include <linux/workqueue.h>
-#include <linux/scatterlist.h>
-
-#include <asm/byteorder.h>
-#include <asm/errno.h>
-#include <asm/param.h>
-#include <asm/system.h>
-#include <asm/types.h>
-
-#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
-#include <asm/io.h> /* for bus_to_virt */
-#endif
-
-#include <scsi/scsi.h>
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_dbg.h>
-#include <scsi/scsi_device.h>
-#include <scsi/scsi_host.h>
-
-#include "csr1212.h"
-#include "highlevel.h"
-#include "hosts.h"
-#include "ieee1394.h"
-#include "ieee1394_core.h"
-#include "ieee1394_hotplug.h"
-#include "ieee1394_transactions.h"
-#include "ieee1394_types.h"
-#include "nodemgr.h"
-#include "sbp2.h"
-
-/*
- * Module load parameter definitions
- */
-
-/*
- * Change 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.
- */
-static int sbp2_max_speed = IEEE1394_SPEED_MAX;
-module_param_named(max_speed, sbp2_max_speed, int, 0644);
-MODULE_PARM_DESC(max_speed, "Limit data transfer speed (5 <= 3200, "
- "4 <= 1600, 3 <= 800, 2 <= 400, 1 <= 200, 0 = 100 Mb/s)");
-
-/*
- * Set serialize_io to 0 or N to use dynamically appended lists of command ORBs.
- * This is and always has been buggy in multiple subtle ways. See above TODOs.
- */
-static int sbp2_serialize_io = 1;
-module_param_named(serialize_io, sbp2_serialize_io, bool, 0444);
-MODULE_PARM_DESC(serialize_io, "Serialize requests coming from SCSI drivers "
- "(default = Y, faster but buggy = N)");
-
-/*
- * Adjust max_sectors if you'd like to influence how many sectors each SCSI
- * command can transfer at most. Please note that some older SBP-2 bridge
- * chips are broken for transfers greater or equal to 128KB, therefore
- * max_sectors used to be a safe 255 sectors for many years. We now have a
- * default of 0 here which means that we let the SCSI stack choose a limit.
- *
- * The SBP2_WORKAROUND_128K_MAX_TRANS flag, if set either in the workarounds
- * module parameter or in the sbp2_workarounds_table[], will override the
- * value of max_sectors. We should use sbp2_workarounds_table[] to cover any
- * bridge chip which becomes known to need the 255 sectors limit.
- */
-static int sbp2_max_sectors;
-module_param_named(max_sectors, sbp2_max_sectors, int, 0444);
-MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported "
- "(default = 0 = use SCSI stack's default)");
-
-/*
- * 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, e.g. OpenGFS, Oracle Cluster
- * File System, or Lustre, then set exclusive_login to zero.
- *
- * 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.
- */
-static int sbp2_exclusive_login = 1;
-module_param_named(exclusive_login, sbp2_exclusive_login, bool, 0644);
-MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
- "(default = Y, use N for concurrent initiators)");
-
-/*
- * If any of the following workarounds is required for your device to work,
- * please submit the kernel messages logged by sbp2 to the linux1394-devel
- * mailing list.
- *
- * - 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.
- */
-static int sbp2_default_workarounds;
-module_param_named(workarounds, sbp2_default_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)");
-
-/*
- * This influences the format of the sysfs attribute
- * /sys/bus/scsi/devices/.../ieee1394_id.
- *
- * The default format is like in older kernels: %016Lx:%d:%d
- * It contains the target's EUI-64, a number given to the logical unit by
- * the ieee1394 driver's nodemgr (starting at 0), and the LUN.
- *
- * The long format is: %016Lx:%06x:%04x
- * It contains the target's EUI-64, the unit directory's directory_ID as per
- * IEEE 1212 clause 7.7.19, and the LUN. This format comes closest to the
- * format of SBP(-3) target port and logical unit identifier as per SAM (SCSI
- * Architecture Model) rev.2 to 4 annex A. Therefore and because it is
- * independent of the implementation of the ieee1394 nodemgr, the longer format
- * is recommended for future use.
- */
-static int sbp2_long_sysfs_ieee1394_id;
-module_param_named(long_ieee1394_id, sbp2_long_sysfs_ieee1394_id, bool, 0644);
-MODULE_PARM_DESC(long_ieee1394_id, "8+3+2 bytes format of ieee1394_id in sysfs "
- "(default = backwards-compatible = N, SAM-conforming = Y)");
-
-
-#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
-#define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
-
-/*
- * Globals
- */
-static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32);
-static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *,
- void (*)(struct scsi_cmnd *));
-static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *);
-static int sbp2_start_device(struct sbp2_lu *);
-static void sbp2_remove_device(struct sbp2_lu *);
-static int sbp2_login_device(struct sbp2_lu *);
-static int sbp2_reconnect_device(struct sbp2_lu *);
-static int sbp2_logout_device(struct sbp2_lu *);
-static void sbp2_host_reset(struct hpsb_host *);
-static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *,
- u64, size_t, u16);
-static int sbp2_agent_reset(struct sbp2_lu *, int);
-static void sbp2_parse_unit_directory(struct sbp2_lu *,
- struct unit_directory *);
-static int sbp2_set_busy_timeout(struct sbp2_lu *);
-static int sbp2_max_speed_and_size(struct sbp2_lu *);
-
-
-static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xa, 0xa, 0xa };
-
-static DEFINE_RWLOCK(sbp2_hi_logical_units_lock);
-
-static struct hpsb_highlevel sbp2_highlevel = {
- .name = SBP2_DEVICE_NAME,
- .host_reset = sbp2_host_reset,
-};
-
-static const struct hpsb_address_ops sbp2_ops = {
- .write = sbp2_handle_status_write
-};
-
-#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
-static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *,
- u64, size_t, u16);
-static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64,
- size_t, u16);
-
-static const struct hpsb_address_ops sbp2_physdma_ops = {
- .read = sbp2_handle_physdma_read,
- .write = sbp2_handle_physdma_write,
-};
-#endif
-
-
-/*
- * Interface to driver core and IEEE 1394 core
- */
-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 & 0xffffff,
- .version = SBP2_SW_VERSION_ENTRY & 0xffffff},
- {}
-};
-MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
-
-static int sbp2_probe(struct device *);
-static int sbp2_remove(struct device *);
-static int sbp2_update(struct unit_directory *);
-
-static struct hpsb_protocol_driver sbp2_driver = {
- .name = SBP2_DEVICE_NAME,
- .id_table = sbp2_id_table,
- .update = sbp2_update,
- .driver = {
- .probe = sbp2_probe,
- .remove = sbp2_remove,
- },
-};
-
-
-/*
- * Interface to SCSI core
- */
-static int sbp2scsi_queuecommand(struct scsi_cmnd *,
- void (*)(struct scsi_cmnd *));
-static int sbp2scsi_abort(struct scsi_cmnd *);
-static int sbp2scsi_reset(struct scsi_cmnd *);
-static int sbp2scsi_slave_alloc(struct scsi_device *);
-static int sbp2scsi_slave_configure(struct scsi_device *);
-static void sbp2scsi_slave_destroy(struct scsi_device *);
-static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *,
- struct device_attribute *, char *);
-
-static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
-
-static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
- &dev_attr_ieee1394_id,
- NULL
-};
-
-static struct scsi_host_template sbp2_shost_template = {
- .module = THIS_MODULE,
- .name = "SBP-2 IEEE-1394",
- .proc_name = SBP2_DEVICE_NAME,
- .queuecommand = sbp2scsi_queuecommand,
- .eh_abort_handler = sbp2scsi_abort,
- .eh_device_reset_handler = sbp2scsi_reset,
- .slave_alloc = sbp2scsi_slave_alloc,
- .slave_configure = sbp2scsi_slave_configure,
- .slave_destroy = sbp2scsi_slave_destroy,
- .this_id = -1,
- .sg_tablesize = SG_ALL,
- .use_clustering = ENABLE_CLUSTERING,
- .cmd_per_lun = SBP2_MAX_CMDS,
- .can_queue = SBP2_MAX_CMDS,
- .sdev_attrs = sbp2_sysfs_sdev_attrs,
-};
-
-#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 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_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,
- }
-};
-
-/**************************************
- * 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]);
-}
-
-/*
- * 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]);
-}
-#else /* BIG_ENDIAN */
-/* Why waste the cpu cycles? */
-#define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0)
-#define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0)
-#endif
-
-static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq);
-
-/*
- * Waits for completion of an SBP-2 access request.
- * Returns nonzero if timed out or prematurely interrupted.
- */
-static int sbp2util_access_timeout(struct sbp2_lu *lu, int timeout)
-{
- long leftover;
-
- leftover = wait_event_interruptible_timeout(
- sbp2_access_wq, lu->access_complete, timeout);
- lu->access_complete = 0;
- return leftover <= 0;
-}
-
-static void sbp2_free_packet(void *packet)
-{
- hpsb_free_tlabel(packet);
- hpsb_free_packet(packet);
-}
-
-/*
- * This is much like hpsb_node_write(), except it ignores the response
- * subaction and returns immediately. Can be used from atomic context.
- */
-static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
- quadlet_t *buf, size_t len)
-{
- struct hpsb_packet *packet;
-
- packet = hpsb_make_writepacket(ne->host, ne->nodeid, addr, buf, len);
- if (!packet)
- return -ENOMEM;
-
- hpsb_set_packet_complete_task(packet, sbp2_free_packet, packet);
- hpsb_node_fill_packet(ne, packet);
- if (hpsb_send_packet(packet) < 0) {
- sbp2_free_packet(packet);
- return -EIO;
- }
- return 0;
-}
-
-static void sbp2util_notify_fetch_agent(struct sbp2_lu *lu, u64 offset,
- quadlet_t *data, size_t len)
-{
- /* There is a small window after a bus reset within which the node
- * entry's generation is current but the reconnect wasn't completed. */
- if (unlikely(atomic_read(&lu->state) == SBP2LU_STATE_IN_RESET))
- return;
-
- if (hpsb_node_write(lu->ne, lu->command_block_agent_addr + offset,
- data, len))
- SBP2_ERR("sbp2util_notify_fetch_agent failed.");
-
- /* Now accept new SCSI commands, unless a bus reset happended during
- * hpsb_node_write. */
- if (likely(atomic_read(&lu->state) != SBP2LU_STATE_IN_RESET))
- scsi_unblock_requests(lu->shost);
-}
-
-static void sbp2util_write_orb_pointer(struct work_struct *work)
-{
- struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
- quadlet_t data[2];
-
- data[0] = ORB_SET_NODE_ID(lu->hi->host->node_id);
- data[1] = lu->last_orb_dma;
- sbp2util_cpu_to_be32_buffer(data, 8);
- sbp2util_notify_fetch_agent(lu, SBP2_ORB_POINTER_OFFSET, data, 8);
-}
-
-static void sbp2util_write_doorbell(struct work_struct *work)
-{
- struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
-
- sbp2util_notify_fetch_agent(lu, SBP2_DOORBELL_OFFSET, NULL, 4);
-}
-
-static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu)
-{
- struct sbp2_command_info *cmd;
- struct device *dmadev = lu->hi->host->device.parent;
- int i, orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS;
-
- for (i = 0; i < orbs; i++) {
- cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
- if (!cmd)
- goto failed_alloc;
-
- cmd->command_orb_dma =
- dma_map_single(dmadev, &cmd->command_orb,
- sizeof(struct sbp2_command_orb),
- DMA_TO_DEVICE);
- if (dma_mapping_error(dmadev, cmd->command_orb_dma))
- goto failed_orb;
-
- cmd->sge_dma =
- dma_map_single(dmadev, &cmd->scatter_gather_element,
- sizeof(cmd->scatter_gather_element),
- DMA_TO_DEVICE);
- if (dma_mapping_error(dmadev, cmd->sge_dma))
- goto failed_sge;
-
- INIT_LIST_HEAD(&cmd->list);
- list_add_tail(&cmd->list, &lu->cmd_orb_completed);
- }
- return 0;
-
-failed_sge:
- dma_unmap_single(dmadev, cmd->command_orb_dma,
- sizeof(struct sbp2_command_orb), DMA_TO_DEVICE);
-failed_orb:
- kfree(cmd);
-failed_alloc:
- return -ENOMEM;
-}
-
-static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu,
- struct hpsb_host *host)
-{
- struct list_head *lh, *next;
- struct sbp2_command_info *cmd;
- unsigned long flags;
-
- spin_lock_irqsave(&lu->cmd_orb_lock, flags);
- if (!list_empty(&lu->cmd_orb_completed))
- list_for_each_safe(lh, next, &lu->cmd_orb_completed) {
- cmd = list_entry(lh, struct sbp2_command_info, list);
- dma_unmap_single(host->device.parent,
- cmd->command_orb_dma,
- sizeof(struct sbp2_command_orb),
- DMA_TO_DEVICE);
- dma_unmap_single(host->device.parent, cmd->sge_dma,
- sizeof(cmd->scatter_gather_element),
- DMA_TO_DEVICE);
- kfree(cmd);
- }
- spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
- return;
-}
-
-/*
- * Finds the sbp2_command for a given outstanding command ORB.
- * Only looks at the in-use list.
- */
-static struct sbp2_command_info *sbp2util_find_command_for_orb(
- struct sbp2_lu *lu, dma_addr_t orb)
-{
- struct sbp2_command_info *cmd;
- unsigned long flags;
-
- spin_lock_irqsave(&lu->cmd_orb_lock, flags);
- if (!list_empty(&lu->cmd_orb_inuse))
- list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
- if (cmd->command_orb_dma == orb) {
- spin_unlock_irqrestore(
- &lu->cmd_orb_lock, flags);
- return cmd;
- }
- spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
- return NULL;
-}
-
-/*
- * Finds the sbp2_command for a given outstanding SCpnt.
- * Only looks at the in-use list.
- * Must be called with lu->cmd_orb_lock held.
- */
-static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(
- struct sbp2_lu *lu, void *SCpnt)
-{
- struct sbp2_command_info *cmd;
-
- if (!list_empty(&lu->cmd_orb_inuse))
- list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
- if (cmd->Current_SCpnt == SCpnt)
- return cmd;
- return NULL;
-}
-
-static struct sbp2_command_info *sbp2util_allocate_command_orb(
- struct sbp2_lu *lu,
- struct scsi_cmnd *Current_SCpnt,
- void (*Current_done)(struct scsi_cmnd *))
-{
- struct list_head *lh;
- struct sbp2_command_info *cmd = NULL;
- unsigned long flags;
-
- spin_lock_irqsave(&lu->cmd_orb_lock, flags);
- if (!list_empty(&lu->cmd_orb_completed)) {
- lh = lu->cmd_orb_completed.next;
- list_del(lh);
- cmd = list_entry(lh, struct sbp2_command_info, list);
- cmd->Current_done = Current_done;
- cmd->Current_SCpnt = Current_SCpnt;
- list_add_tail(&cmd->list, &lu->cmd_orb_inuse);
- } else
- SBP2_ERR("%s: no orbs available", __func__);
- spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
- return cmd;
-}
-
-/*
- * Unmaps the DMAs of a command and moves the command to the completed ORB list.
- * Must be called with lu->cmd_orb_lock held.
- */
-static void sbp2util_mark_command_completed(struct sbp2_lu *lu,
- struct sbp2_command_info *cmd)
-{
- if (scsi_sg_count(cmd->Current_SCpnt))
- dma_unmap_sg(lu->ud->ne->host->device.parent,
- scsi_sglist(cmd->Current_SCpnt),
- scsi_sg_count(cmd->Current_SCpnt),
- cmd->Current_SCpnt->sc_data_direction);
- list_move_tail(&cmd->list, &lu->cmd_orb_completed);
-}
-
-/*
- * Is lu valid? Is the 1394 node still present?
- */
-static inline int sbp2util_node_is_available(struct sbp2_lu *lu)
-{
- return lu && lu->ne && !lu->ne->in_limbo;
-}
-
-/*********************************************
- * IEEE-1394 core driver stack related section
- *********************************************/
-
-static int sbp2_probe(struct device *dev)
-{
- struct unit_directory *ud;
- struct sbp2_lu *lu;
-
- ud = container_of(dev, struct unit_directory, device);
-
- /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
- * instead. */
- if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
- return -ENODEV;
-
- lu = sbp2_alloc_device(ud);
- if (!lu)
- return -ENOMEM;
-
- sbp2_parse_unit_directory(lu, ud);
- return sbp2_start_device(lu);
-}
-
-static int sbp2_remove(struct device *dev)
-{
- struct unit_directory *ud;
- struct sbp2_lu *lu;
- struct scsi_device *sdev;
-
- ud = container_of(dev, struct unit_directory, device);
- lu = dev_get_drvdata(&ud->device);
- if (!lu)
- return 0;
-
- if (lu->shost) {
- /* Get rid of enqueued commands if there is no chance to
- * send them. */
- if (!sbp2util_node_is_available(lu))
- sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT);
- /* scsi_remove_device() may trigger shutdown functions of SCSI
- * highlevel drivers which would deadlock if blocked. */
- atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN);
- scsi_unblock_requests(lu->shost);
- }
- sdev = lu->sdev;
- if (sdev) {
- lu->sdev = NULL;
- scsi_remove_device(sdev);
- }
-
- sbp2_logout_device(lu);
- sbp2_remove_device(lu);
-
- return 0;
-}
-
-static int sbp2_update(struct unit_directory *ud)
-{
- struct sbp2_lu *lu = dev_get_drvdata(&ud->device);
-
- if (sbp2_reconnect_device(lu) != 0) {
- /*
- * Reconnect failed. If another bus reset happened,
- * let nodemgr proceed and call sbp2_update again later
- * (or sbp2_remove if this node went away).
- */
- if (!hpsb_node_entry_valid(lu->ne))
- return 0;
- /*
- * Or the target rejected the reconnect because we weren't
- * fast enough. Try a regular login, but first log out
- * just in case of any weirdness.
- */
- sbp2_logout_device(lu);
-
- if (sbp2_login_device(lu) != 0) {
- if (!hpsb_node_entry_valid(lu->ne))
- return 0;
-
- /* Maybe another initiator won the login. */
- SBP2_ERR("Failed to reconnect to sbp2 device!");
- return -EBUSY;
- }
- }
-
- sbp2_set_busy_timeout(lu);
- sbp2_agent_reset(lu, 1);
- sbp2_max_speed_and_size(lu);
-
- /* Complete any pending commands with busy (so they get retried)
- * and remove them from our queue. */
- sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
-
- /* Accept new commands unless there was another bus reset in the
- * meantime. */
- if (hpsb_node_entry_valid(lu->ne)) {
- atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
- scsi_unblock_requests(lu->shost);
- }
- return 0;
-}
-
-static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud)
-{
- struct sbp2_fwhost_info *hi;
- struct Scsi_Host *shost = NULL;
- struct sbp2_lu *lu = NULL;
- unsigned long flags;
-
- lu = kzalloc(sizeof(*lu), GFP_KERNEL);
- if (!lu) {
- SBP2_ERR("failed to create lu");
- goto failed_alloc;
- }
-
- lu->ne = ud->ne;
- lu->ud = ud;
- lu->speed_code = IEEE1394_SPEED_100;
- lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
- lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
- INIT_LIST_HEAD(&lu->cmd_orb_inuse);
- INIT_LIST_HEAD(&lu->cmd_orb_completed);
- INIT_LIST_HEAD(&lu->lu_list);
- spin_lock_init(&lu->cmd_orb_lock);
- atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
- INIT_WORK(&lu->protocol_work, NULL);
-
- dev_set_drvdata(&ud->device, lu);
-
- hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
- if (!hi) {
- hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host,
- sizeof(*hi));
- if (!hi) {
- SBP2_ERR("failed to allocate hostinfo");
- goto failed_alloc;
- }
- hi->host = ud->ne->host;
- INIT_LIST_HEAD(&hi->logical_units);
-
-#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
- /* Handle data movement if physical dma is not
- * enabled or not supported on host controller */
- if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
- &sbp2_physdma_ops,
- 0x0ULL, 0xfffffffcULL)) {
- SBP2_ERR("failed to register lower 4GB address range");
- goto failed_alloc;
- }
-#endif
- }
-
- if (dma_get_max_seg_size(hi->host->device.parent) > SBP2_MAX_SEG_SIZE)
- BUG_ON(dma_set_max_seg_size(hi->host->device.parent,
- SBP2_MAX_SEG_SIZE));
-
- /* Prevent unloading of the 1394 host */
- if (!try_module_get(hi->host->driver->owner)) {
- SBP2_ERR("failed to get a reference on 1394 host driver");
- goto failed_alloc;
- }
-
- lu->hi = hi;
-
- write_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
- list_add_tail(&lu->lu_list, &hi->logical_units);
- write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
-
- /* Register the status FIFO address range. We could use the same FIFO
- * for targets at different nodes. However we need different FIFOs per
- * target in order to support multi-unit devices.
- * The FIFO is located out of the local host controller's physical range
- * but, if possible, within the posted write area. Status writes will
- * then be performed as unified transactions. This slightly reduces
- * bandwidth usage, and some Prolific based devices seem to require it.
- */
- lu->status_fifo_addr = hpsb_allocate_and_register_addrspace(
- &sbp2_highlevel, ud->ne->host, &sbp2_ops,
- sizeof(struct sbp2_status_block), sizeof(quadlet_t),
- ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
- if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
- SBP2_ERR("failed to allocate status FIFO address range");
- goto failed_alloc;
- }
-
- shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long));
- if (!shost) {
- SBP2_ERR("failed to register scsi host");
- goto failed_alloc;
- }
-
- shost->hostdata[0] = (unsigned long)lu;
- shost->max_cmd_len = SBP2_MAX_CDB_SIZE;
-
- if (!scsi_add_host(shost, &ud->device)) {
- lu->shost = shost;
- return lu;
- }
-
- SBP2_ERR("failed to add scsi host");
- scsi_host_put(shost);
-
-failed_alloc:
- sbp2_remove_device(lu);
- return NULL;
-}
-
-static void sbp2_host_reset(struct hpsb_host *host)
-{
- struct sbp2_fwhost_info *hi;
- struct sbp2_lu *lu;
- unsigned long flags;
-
- hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
- if (!hi)
- return;
-
- read_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
-
- list_for_each_entry(lu, &hi->logical_units, lu_list)
- if (atomic_cmpxchg(&lu->state,
- SBP2LU_STATE_RUNNING, SBP2LU_STATE_IN_RESET)
- == SBP2LU_STATE_RUNNING)
- scsi_block_requests(lu->shost);
-
- read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
-}
-
-static int sbp2_start_device(struct sbp2_lu *lu)
-{
- struct sbp2_fwhost_info *hi = lu->hi;
- int error;
-
- lu->login_response = dma_alloc_coherent(hi->host->device.parent,
- sizeof(struct sbp2_login_response),
- &lu->login_response_dma, GFP_KERNEL);
- if (!lu->login_response)
- goto alloc_fail;
-
- lu->query_logins_orb = dma_alloc_coherent(hi->host->device.parent,
- sizeof(struct sbp2_query_logins_orb),
- &lu->query_logins_orb_dma, GFP_KERNEL);
- if (!lu->query_logins_orb)
- goto alloc_fail;
-
- lu->query_logins_response = dma_alloc_coherent(hi->host->device.parent,
- sizeof(struct sbp2_query_logins_response),
- &lu->query_logins_response_dma, GFP_KERNEL);
- if (!lu->query_logins_response)
- goto alloc_fail;
-
- lu->reconnect_orb = dma_alloc_coherent(hi->host->device.parent,
- sizeof(struct sbp2_reconnect_orb),
- &lu->reconnect_orb_dma, GFP_KERNEL);
- if (!lu->reconnect_orb)
- goto alloc_fail;
-
- lu->logout_orb = dma_alloc_coherent(hi->host->device.parent,
- sizeof(struct sbp2_logout_orb),
- &lu->logout_orb_dma, GFP_KERNEL);
- if (!lu->logout_orb)
- goto alloc_fail;
-
- lu->login_orb = dma_alloc_coherent(hi->host->device.parent,
- sizeof(struct sbp2_login_orb),
- &lu->login_orb_dma, GFP_KERNEL);
- if (!lu->login_orb)
- goto alloc_fail;
-
- if (sbp2util_create_command_orb_pool(lu))
- goto alloc_fail;
-
- /* Wait a second before trying to log in. Previously logged in
- * initiators need a chance to reconnect. */
- if (msleep_interruptible(1000)) {
- sbp2_remove_device(lu);
- return -EINTR;
- }
-
- if (sbp2_login_device(lu)) {
- sbp2_remove_device(lu);
- return -EBUSY;
- }
-
- sbp2_set_busy_timeout(lu);
- sbp2_agent_reset(lu, 1);
- sbp2_max_speed_and_size(lu);
-
- if (lu->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY)
- ssleep(SBP2_INQUIRY_DELAY);
-
- error = scsi_add_device(lu->shost, 0, lu->ud->id, 0);
- if (error) {
- SBP2_ERR("scsi_add_device failed");
- sbp2_logout_device(lu);
- sbp2_remove_device(lu);
- return error;
- }
-
- return 0;
-
-alloc_fail:
- SBP2_ERR("Could not allocate memory for lu");
- sbp2_remove_device(lu);
- return -ENOMEM;
-}
-
-static void sbp2_remove_device(struct sbp2_lu *lu)
-{
- struct sbp2_fwhost_info *hi;
- unsigned long flags;
-
- if (!lu)
- return;
- hi = lu->hi;
- if (!hi)
- goto no_hi;
-
- if (lu->shost) {
- scsi_remove_host(lu->shost);
- scsi_host_put(lu->shost);
- }
- flush_scheduled_work();
- sbp2util_remove_command_orb_pool(lu, hi->host);
-
- write_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
- list_del(&lu->lu_list);
- write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
-
- if (lu->login_response)
- dma_free_coherent(hi->host->device.parent,
- sizeof(struct sbp2_login_response),
- lu->login_response,
- lu->login_response_dma);
- if (lu->login_orb)
- dma_free_coherent(hi->host->device.parent,
- sizeof(struct sbp2_login_orb),
- lu->login_orb,
- lu->login_orb_dma);
- if (lu->reconnect_orb)
- dma_free_coherent(hi->host->device.parent,
- sizeof(struct sbp2_reconnect_orb),
- lu->reconnect_orb,
- lu->reconnect_orb_dma);
- if (lu->logout_orb)
- dma_free_coherent(hi->host->device.parent,
- sizeof(struct sbp2_logout_orb),
- lu->logout_orb,
- lu->logout_orb_dma);
- if (lu->query_logins_orb)
- dma_free_coherent(hi->host->device.parent,
- sizeof(struct sbp2_query_logins_orb),
- lu->query_logins_orb,
- lu->query_logins_orb_dma);
- if (lu->query_logins_response)
- dma_free_coherent(hi->host->device.parent,
- sizeof(struct sbp2_query_logins_response),
- lu->query_logins_response,
- lu->query_logins_response_dma);
-
- if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
- hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
- lu->status_fifo_addr);
-
- dev_set_drvdata(&lu->ud->device, NULL);
-
- module_put(hi->host->driver->owner);
-no_hi:
- kfree(lu);
-}
-
-#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
-/*
- * Deal with write requests on adapters which do not support physical DMA or
- * have it switched off.
- */
-static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
- int destid, quadlet_t *data, u64 addr,
- size_t length, u16 flags)
-{
- memcpy(bus_to_virt((u32) addr), data, length);
- return RCODE_COMPLETE;
-}
-
-/*
- * Deal with read requests on adapters which do not support physical DMA or
- * have it switched off.
- */
-static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
- quadlet_t *data, u64 addr, size_t length,
- u16 flags)
-{
- memcpy(data, bus_to_virt((u32) addr), length);
- return RCODE_COMPLETE;
-}
-#endif
-
-/**************************************
- * SBP-2 protocol related section
- **************************************/
-
-static int sbp2_query_logins(struct sbp2_lu *lu)
-{
- struct sbp2_fwhost_info *hi = lu->hi;
- quadlet_t data[2];
- int max_logins;
- int active_logins;
-
- lu->query_logins_orb->reserved1 = 0x0;
- lu->query_logins_orb->reserved2 = 0x0;
-
- lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma;
- lu->query_logins_orb->query_response_hi =
- ORB_SET_NODE_ID(hi->host->node_id);
- lu->query_logins_orb->lun_misc =
- ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
- lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
- lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun);
-
- lu->query_logins_orb->reserved_resp_length =
- ORB_SET_QUERY_LOGINS_RESP_LENGTH(
- sizeof(struct sbp2_query_logins_response));
-
- lu->query_logins_orb->status_fifo_hi =
- ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
- lu->query_logins_orb->status_fifo_lo =
- ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
-
- sbp2util_cpu_to_be32_buffer(lu->query_logins_orb,
- sizeof(struct sbp2_query_logins_orb));
-
- memset(lu->query_logins_response, 0,
- sizeof(struct sbp2_query_logins_response));
-
- data[0] = ORB_SET_NODE_ID(hi->host->node_id);
- data[1] = lu->query_logins_orb_dma;
- sbp2util_cpu_to_be32_buffer(data, 8);
-
- hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
-
- if (sbp2util_access_timeout(lu, 2*HZ)) {
- SBP2_INFO("Error querying logins to SBP-2 device - timed out");
- return -EIO;
- }
-
- if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) {
- SBP2_INFO("Error querying logins to SBP-2 device - timed out");
- return -EIO;
- }
-
- if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
- SBP2_INFO("Error querying logins to SBP-2 device - failed");
- return -EIO;
- }
-
- sbp2util_cpu_to_be32_buffer(lu->query_logins_response,
- sizeof(struct sbp2_query_logins_response));
-
- max_logins = RESPONSE_GET_MAX_LOGINS(
- lu->query_logins_response->length_max_logins);
- SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
-
- active_logins = RESPONSE_GET_ACTIVE_LOGINS(
- lu->query_logins_response->length_max_logins);
- SBP2_INFO("Number of active logins: %d", active_logins);
-
- if (active_logins >= max_logins) {
- return -EIO;
- }
-
- return 0;
-}
-
-static int sbp2_login_device(struct sbp2_lu *lu)
-{
- struct sbp2_fwhost_info *hi = lu->hi;
- quadlet_t data[2];
-
- if (!lu->login_orb)
- return -EIO;
-
- if (!sbp2_exclusive_login && sbp2_query_logins(lu)) {
- SBP2_INFO("Device does not support any more concurrent logins");
- return -EIO;
- }
-
- /* assume no password */
- lu->login_orb->password_hi = 0;
- lu->login_orb->password_lo = 0;
-
- lu->login_orb->login_response_lo = lu->login_response_dma;
- lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
- lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
-
- /* one second reconnect time */
- lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0);
- lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login);
- lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1);
- lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun);
-
- lu->login_orb->passwd_resp_lengths =
- ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
-
- lu->login_orb->status_fifo_hi =
- ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
- lu->login_orb->status_fifo_lo =
- ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
-
- sbp2util_cpu_to_be32_buffer(lu->login_orb,
- sizeof(struct sbp2_login_orb));
-
- memset(lu->login_response, 0, sizeof(struct sbp2_login_response));
-
- data[0] = ORB_SET_NODE_ID(hi->host->node_id);
- data[1] = lu->login_orb_dma;
- sbp2util_cpu_to_be32_buffer(data, 8);
-
- hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
-
- /* wait up to 20 seconds for login status */
- if (sbp2util_access_timeout(lu, 20*HZ)) {
- SBP2_ERR("Error logging into SBP-2 device - timed out");
- return -EIO;
- }
-
- /* make sure that the returned status matches the login ORB */
- if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) {
- SBP2_ERR("Error logging into SBP-2 device - timed out");
- return -EIO;
- }
-
- if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
- SBP2_ERR("Error logging into SBP-2 device - failed");
- return -EIO;
- }
-
- sbp2util_cpu_to_be32_buffer(lu->login_response,
- sizeof(struct sbp2_login_response));
- lu->command_block_agent_addr =
- ((u64)lu->login_response->command_block_agent_hi) << 32;
- lu->command_block_agent_addr |=
- ((u64)lu->login_response->command_block_agent_lo);
- lu->command_block_agent_addr &= 0x0000ffffffffffffULL;
-
- SBP2_INFO("Logged into SBP-2 device");
- return 0;
-}
-
-static int sbp2_logout_device(struct sbp2_lu *lu)
-{
- struct sbp2_fwhost_info *hi = lu->hi;
- quadlet_t data[2];
- int error;
-
- lu->logout_orb->reserved1 = 0x0;
- lu->logout_orb->reserved2 = 0x0;
- lu->logout_orb->reserved3 = 0x0;
- lu->logout_orb->reserved4 = 0x0;
-
- lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
- lu->logout_orb->login_ID_misc |=
- ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
- lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
-
- lu->logout_orb->reserved5 = 0x0;
- lu->logout_orb->status_fifo_hi =
- ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
- lu->logout_orb->status_fifo_lo =
- ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
-
- sbp2util_cpu_to_be32_buffer(lu->logout_orb,
- sizeof(struct sbp2_logout_orb));
-
- data[0] = ORB_SET_NODE_ID(hi->host->node_id);
- data[1] = lu->logout_orb_dma;
- sbp2util_cpu_to_be32_buffer(data, 8);
-
- error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
- if (error)
- return error;
-
- /* wait up to 1 second for the device to complete logout */
- if (sbp2util_access_timeout(lu, HZ))
- return -EIO;
-
- SBP2_INFO("Logged out of SBP-2 device");
- return 0;
-}
-
-static int sbp2_reconnect_device(struct sbp2_lu *lu)
-{
- struct sbp2_fwhost_info *hi = lu->hi;
- quadlet_t data[2];
- int error;
-
- lu->reconnect_orb->reserved1 = 0x0;
- lu->reconnect_orb->reserved2 = 0x0;
- lu->reconnect_orb->reserved3 = 0x0;
- lu->reconnect_orb->reserved4 = 0x0;
-
- lu->reconnect_orb->login_ID_misc =
- ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
- lu->reconnect_orb->login_ID_misc |=
- ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
- lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
-
- lu->reconnect_orb->reserved5 = 0x0;
- lu->reconnect_orb->status_fifo_hi =
- ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
- lu->reconnect_orb->status_fifo_lo =
- ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
-
- sbp2util_cpu_to_be32_buffer(lu->reconnect_orb,
- sizeof(struct sbp2_reconnect_orb));
-
- data[0] = ORB_SET_NODE_ID(hi->host->node_id);
- data[1] = lu->reconnect_orb_dma;
- sbp2util_cpu_to_be32_buffer(data, 8);
-
- error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
- if (error)
- return error;
-
- /* wait up to 1 second for reconnect status */
- if (sbp2util_access_timeout(lu, HZ)) {
- SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
- return -EIO;
- }
-
- /* make sure that the returned status matches the reconnect ORB */
- if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) {
- SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
- return -EIO;
- }
-
- if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
- SBP2_ERR("Error reconnecting to SBP-2 device - failed");
- return -EIO;
- }
-
- SBP2_INFO("Reconnected to SBP-2 device");
- return 0;
-}
-
-/*
- * Set the target node's Single Phase Retry limit. Affects the target's retry
- * behaviour if our node is too busy to accept requests.
- */
-static int sbp2_set_busy_timeout(struct sbp2_lu *lu)
-{
- quadlet_t data;
-
- data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
- if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
- SBP2_ERR("%s error", __func__);
- return 0;
-}
-
-static void sbp2_parse_unit_directory(struct sbp2_lu *lu,
- struct unit_directory *ud)
-{
- struct csr1212_keyval *kv;
- struct csr1212_dentry *dentry;
- u64 management_agent_addr;
- u32 firmware_revision, model;
- unsigned workarounds;
- int i;
-
- management_agent_addr = 0;
- firmware_revision = SBP2_ROM_VALUE_MISSING;
- model = ud->flags & UNIT_DIRECTORY_MODEL_ID ?
- ud->model_id : SBP2_ROM_VALUE_MISSING;
-
- csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
- switch (kv->key.id) {
- case CSR1212_KV_ID_DEPENDENT_INFO:
- if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET)
- management_agent_addr =
- CSR1212_REGISTER_SPACE_BASE +
- (kv->value.csr_offset << 2);
-
- else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE)
- lu->lun = ORB_SET_LUN(kv->value.immediate);
- break;
-
-
- case SBP2_FIRMWARE_REVISION_KEY:
- firmware_revision = kv->value.immediate;
- break;
-
- default:
- /* FIXME: Check for SBP2_UNIT_CHARACTERISTICS_KEY
- * mgt_ORB_timeout and ORB_size, SBP-2 clause 7.4.8. */
-
- /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY.
- * Its "ordered" bit has consequences for command ORB
- * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */
- break;
- }
- }
-
- workarounds = sbp2_default_workarounds;
-
- if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
- for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
- if (sbp2_workarounds_table[i].firmware_revision !=
- SBP2_ROM_VALUE_WILDCARD &&
- sbp2_workarounds_table[i].firmware_revision !=
- (firmware_revision & 0xffff00))
- continue;
- if (sbp2_workarounds_table[i].model !=
- SBP2_ROM_VALUE_WILDCARD &&
- sbp2_workarounds_table[i].model != model)
- continue;
- workarounds |= sbp2_workarounds_table[i].workarounds;
- break;
- }
-
- if (workarounds)
- SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
- "(firmware_revision 0x%06x, vendor_id 0x%06x,"
- " model_id 0x%06x)",
- NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
- workarounds, firmware_revision, ud->vendor_id,
- model);
-
- /* We would need one SCSI host template for each target to adjust
- * max_sectors on the fly, therefore warn only. */
- if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
- (sbp2_max_sectors * 512) > (128 * 1024))
- SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB "
- "max transfer size. WARNING: Current max_sectors "
- "setting is larger than 128KB (%d sectors)",
- NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
- sbp2_max_sectors);
-
- /* If this is a logical unit directory entry, process the parent
- * to get the values. */
- if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
- struct unit_directory *parent_ud = container_of(
- ud->device.parent, struct unit_directory, device);
- sbp2_parse_unit_directory(lu, parent_ud);
- } else {
- lu->management_agent_addr = management_agent_addr;
- lu->workarounds = workarounds;
- if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
- lu->lun = ORB_SET_LUN(ud->lun);
- }
-}
-
-#define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
-
-/*
- * 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 sbp2_lu *lu)
-{
- struct sbp2_fwhost_info *hi = lu->hi;
- u8 payload;
-
- lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)];
-
- if (lu->speed_code > sbp2_max_speed) {
- lu->speed_code = sbp2_max_speed;
- SBP2_INFO("Reducing speed to %s",
- hpsb_speedto_str[sbp2_max_speed]);
- }
-
- /* Payload size is the lesser of what our speed supports and what
- * our host supports. */
- payload = min(sbp2_speedto_max_payload[lu->speed_code],
- (u8) (hi->host->csr.max_rec - 1));
-
- /* If physical DMA is off, work around limitation in ohci1394:
- * packet size must not exceed PAGE_SIZE */
- if (lu->ne->host->low_addr_space < (1ULL << 32))
- while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE &&
- payload)
- payload--;
-
- SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
- NODE_BUS_ARGS(hi->host, lu->ne->nodeid),
- hpsb_speedto_str[lu->speed_code],
- SBP2_PAYLOAD_TO_BYTES(payload));
-
- lu->max_payload_size = payload;
- return 0;
-}
-
-static int sbp2_agent_reset(struct sbp2_lu *lu, int wait)
-{
- quadlet_t data;
- u64 addr;
- int retval;
- unsigned long flags;
-
- /* flush lu->protocol_work */
- if (wait)
- flush_scheduled_work();
-
- data = ntohl(SBP2_AGENT_RESET_DATA);
- addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
-
- if (wait)
- retval = hpsb_node_write(lu->ne, addr, &data, 4);
- else
- retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4);
-
- if (retval < 0) {
- SBP2_ERR("hpsb_node_write failed.\n");
- return -EIO;
- }
-
- /* make sure that the ORB_POINTER is written on next command */
- spin_lock_irqsave(&lu->cmd_orb_lock, flags);
- lu->last_orb = NULL;
- spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
-
- return 0;
-}
-
-static int sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
- struct sbp2_fwhost_info *hi,
- struct sbp2_command_info *cmd,
- unsigned int sg_count,
- struct scatterlist *sg,
- u32 orb_direction,
- enum dma_data_direction dma_dir)
-{
- struct device *dmadev = hi->host->device.parent;
- struct sbp2_unrestricted_page_table *pt;
- int i, n;
-
- n = dma_map_sg(dmadev, sg, sg_count, dma_dir);
- if (n == 0)
- return -ENOMEM;
-
- orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
- orb->misc |= ORB_SET_DIRECTION(orb_direction);
-
- /* special case if only one element (and less than 64KB in size) */
- if (n == 1) {
- orb->misc |= ORB_SET_DATA_SIZE(sg_dma_len(sg));
- orb->data_descriptor_lo = sg_dma_address(sg);
- } else {
- pt = &cmd->scatter_gather_element[0];
-
- dma_sync_single_for_cpu(dmadev, cmd->sge_dma,
- sizeof(cmd->scatter_gather_element),
- DMA_TO_DEVICE);
-
- for_each_sg(sg, sg, n, i) {
- pt[i].high = cpu_to_be32(sg_dma_len(sg) << 16);
- pt[i].low = cpu_to_be32(sg_dma_address(sg));
- }
-
- orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1) |
- ORB_SET_DATA_SIZE(n);
- orb->data_descriptor_lo = cmd->sge_dma;
-
- dma_sync_single_for_device(dmadev, cmd->sge_dma,
- sizeof(cmd->scatter_gather_element),
- DMA_TO_DEVICE);
- }
- return 0;
-}
-
-static int sbp2_create_command_orb(struct sbp2_lu *lu,
- struct sbp2_command_info *cmd,
- struct scsi_cmnd *SCpnt)
-{
- struct device *dmadev = lu->hi->host->device.parent;
- struct sbp2_command_orb *orb = &cmd->command_orb;
- unsigned int scsi_request_bufflen = scsi_bufflen(SCpnt);
- enum dma_data_direction dma_dir = SCpnt->sc_data_direction;
- u32 orb_direction;
- int ret;
-
- dma_sync_single_for_cpu(dmadev, cmd->command_orb_dma,
- sizeof(struct sbp2_command_orb), DMA_TO_DEVICE);
- /*
- * 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).
- */
- orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
- orb->next_ORB_lo = 0x0;
- orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size);
- orb->misc |= ORB_SET_SPEED(lu->speed_code);
- orb->misc |= ORB_SET_NOTIFY(1);
-
- if (dma_dir == DMA_NONE)
- orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
- else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
- orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
- else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
- orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
- else {
- SBP2_INFO("Falling back to DMA_NONE");
- orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
- }
-
- /* set up our page table stuff */
- if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
- orb->data_descriptor_hi = 0x0;
- orb->data_descriptor_lo = 0x0;
- orb->misc |= ORB_SET_DIRECTION(1);
- ret = 0;
- } else {
- ret = sbp2_prep_command_orb_sg(orb, lu->hi, cmd,
- scsi_sg_count(SCpnt),
- scsi_sglist(SCpnt),
- orb_direction, dma_dir);
- }
- sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb));
-
- memset(orb->cdb, 0, sizeof(orb->cdb));
- memcpy(orb->cdb, SCpnt->cmnd, SCpnt->cmd_len);
-
- dma_sync_single_for_device(dmadev, cmd->command_orb_dma,
- sizeof(struct sbp2_command_orb), DMA_TO_DEVICE);
- return ret;
-}
-
-static void sbp2_link_orb_command(struct sbp2_lu *lu,
- struct sbp2_command_info *cmd)
-{
- struct sbp2_fwhost_info *hi = lu->hi;
- struct sbp2_command_orb *last_orb;
- dma_addr_t last_orb_dma;
- u64 addr = lu->command_block_agent_addr;
- quadlet_t data[2];
- size_t length;
- unsigned long flags;
-
- /* check to see if there are any previous orbs to use */
- spin_lock_irqsave(&lu->cmd_orb_lock, flags);
- last_orb = lu->last_orb;
- last_orb_dma = lu->last_orb_dma;
- if (!last_orb) {
- /*
- * last_orb == NULL means: We know that the target's fetch agent
- * is not active right now.
- */
- addr += SBP2_ORB_POINTER_OFFSET;
- data[0] = ORB_SET_NODE_ID(hi->host->node_id);
- data[1] = cmd->command_orb_dma;
- sbp2util_cpu_to_be32_buffer(data, 8);
- length = 8;
- } else {
- /*
- * last_orb != NULL means: We know that the target's fetch agent
- * is (very probably) not dead or in reset state right now.
- * We have an ORB already sent that we can append a new one to.
- * The target's fetch agent may or may not have read this
- * previous ORB yet.
- */
- dma_sync_single_for_cpu(hi->host->device.parent, last_orb_dma,
- sizeof(struct sbp2_command_orb),
- DMA_TO_DEVICE);
- last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma);
- wmb();
- /* Tells hardware that this pointer is valid */
- last_orb->next_ORB_hi = 0;
- dma_sync_single_for_device(hi->host->device.parent,
- last_orb_dma,
- sizeof(struct sbp2_command_orb),
- DMA_TO_DEVICE);
- addr += SBP2_DOORBELL_OFFSET;
- data[0] = 0;
- length = 4;
- }
- lu->last_orb = &cmd->command_orb;
- lu->last_orb_dma = cmd->command_orb_dma;
- spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
-
- if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) {
- /*
- * sbp2util_node_write_no_wait failed. We certainly ran out
- * of transaction labels, perhaps just because there were no
- * context switches which gave khpsbpkt a chance to collect
- * free tlabels. Try again in non-atomic context. If necessary,
- * the workqueue job will sleep to guaranteedly get a tlabel.
- * We do not accept new commands until the job is over.
- */
- scsi_block_requests(lu->shost);
- PREPARE_WORK(&lu->protocol_work,
- last_orb ? sbp2util_write_doorbell:
- sbp2util_write_orb_pointer);
- schedule_work(&lu->protocol_work);
- }
-}
-
-static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt,
- void (*done)(struct scsi_cmnd *))
-{
- struct sbp2_command_info *cmd;
-
- cmd = sbp2util_allocate_command_orb(lu, SCpnt, done);
- if (!cmd)
- return -EIO;
-
- if (sbp2_create_command_orb(lu, cmd, SCpnt))
- return -ENOMEM;
-
- sbp2_link_orb_command(lu, cmd);
- return 0;
-}
-
-/*
- * 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)
-{
- /* 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;
-}
-
-static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid,
- int destid, quadlet_t *data, u64 addr,
- size_t length, u16 fl)
-{
- struct sbp2_fwhost_info *hi;
- struct sbp2_lu *lu = NULL, *lu_tmp;
- struct scsi_cmnd *SCpnt = NULL;
- struct sbp2_status_block *sb;
- u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
- struct sbp2_command_info *cmd;
- unsigned long flags;
-
- if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) {
- SBP2_ERR("Wrong size of status block");
- return RCODE_ADDRESS_ERROR;
- }
- if (unlikely(!host)) {
- SBP2_ERR("host is NULL - this is bad!");
- return RCODE_ADDRESS_ERROR;
- }
- hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
- if (unlikely(!hi)) {
- SBP2_ERR("host info is NULL - this is bad!");
- return RCODE_ADDRESS_ERROR;
- }
-
- /* Find the unit which wrote the status. */
- read_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
- list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) {
- if (lu_tmp->ne->nodeid == nodeid &&
- lu_tmp->status_fifo_addr == addr) {
- lu = lu_tmp;
- break;
- }
- }
- read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
-
- if (unlikely(!lu)) {
- SBP2_ERR("lu is NULL - device is gone?");
- return RCODE_ADDRESS_ERROR;
- }
-
- /* Put response into lu status fifo buffer. The first two bytes
- * come in big endian bit order. Often the target writes only a
- * truncated status block, minimally the first two quadlets. The rest
- * is implied to be zeros. */
- sb = &lu->status_block;
- memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent));
- memcpy(sb, data, length);
- sbp2util_be32_to_cpu_buffer(sb, 8);
-
- /* Ignore unsolicited status. Handle command ORB status. */
- if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2))
- cmd = NULL;
- else
- cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo);
- if (cmd) {
- /* Grab SCSI command pointers and check status. */
- /*
- * FIXME: If the src field in the status is 1, the ORB DMA must
- * not be reused until status for a subsequent ORB is received.
- */
- SCpnt = cmd->Current_SCpnt;
- spin_lock_irqsave(&lu->cmd_orb_lock, flags);
- sbp2util_mark_command_completed(lu, cmd);
- spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
-
- if (SCpnt) {
- u32 h = sb->ORB_offset_hi_misc;
- u32 r = STATUS_GET_RESP(h);
-
- if (r != RESP_STATUS_REQUEST_COMPLETE) {
- SBP2_INFO("resp 0x%x, sbp_status 0x%x",
- r, STATUS_GET_SBP_STATUS(h));
- scsi_status =
- r == RESP_STATUS_TRANSPORT_FAILURE ?
- SBP2_SCSI_STATUS_BUSY :
- SBP2_SCSI_STATUS_COMMAND_TERMINATED;
- }
-
- if (STATUS_GET_LEN(h) > 1)
- scsi_status = sbp2_status_to_sense_data(
- (unchar *)sb, SCpnt->sense_buffer);
-
- if (STATUS_TEST_DEAD(h))
- sbp2_agent_reset(lu, 0);
- }
-
- /* Check here to see if there are no commands in-use. If there
- * are none, we know that the fetch agent left the active state
- * _and_ that we did not reactivate it yet. Therefore clear
- * last_orb so that next time we write directly to the
- * ORB_POINTER register. That way the fetch agent does not need
- * to refetch the next_ORB. */
- spin_lock_irqsave(&lu->cmd_orb_lock, flags);
- if (list_empty(&lu->cmd_orb_inuse))
- lu->last_orb = NULL;
- spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
-
- } else {
- /* It's probably status after a management request. */
- if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) ||
- (sb->ORB_offset_lo == lu->login_orb_dma) ||
- (sb->ORB_offset_lo == lu->query_logins_orb_dma) ||
- (sb->ORB_offset_lo == lu->logout_orb_dma)) {
- lu->access_complete = 1;
- wake_up_interruptible(&sbp2_access_wq);
- }
- }
-
- if (SCpnt)
- sbp2scsi_complete_command(lu, scsi_status, SCpnt,
- cmd->Current_done);
- return RCODE_COMPLETE;
-}
-
-/**************************************
- * SCSI interface related section
- **************************************/
-
-static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
- void (*done)(struct scsi_cmnd *))
-{
- struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
- struct sbp2_fwhost_info *hi;
- int result = DID_NO_CONNECT << 16;
-
- if (unlikely(!sbp2util_node_is_available(lu)))
- goto done;
-
- hi = lu->hi;
-
- if (unlikely(!hi)) {
- SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!");
- goto done;
- }
-
- /* Multiple units are currently represented to the SCSI core as separate
- * targets, not as one target with multiple LUs. Therefore return
- * selection time-out to any IO directed at non-zero LUNs. */
- if (unlikely(SCpnt->device->lun))
- goto done;
-
- if (unlikely(!hpsb_node_entry_valid(lu->ne))) {
- SBP2_ERR("Bus reset in progress - rejecting command");
- result = DID_BUS_BUSY << 16;
- goto done;
- }
-
- /* Bidirectional commands are not yet implemented,
- * and unknown transfer direction not handled. */
- if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) {
- SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
- result = DID_ERROR << 16;
- goto done;
- }
-
- if (sbp2_send_command(lu, SCpnt, done)) {
- SBP2_ERR("Error sending SCSI command");
- sbp2scsi_complete_command(lu,
- SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
- SCpnt, done);
- }
- return 0;
-
-done:
- SCpnt->result = result;
- done(SCpnt);
- return 0;
-}
-
-static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status)
-{
- struct list_head *lh;
- struct sbp2_command_info *cmd;
- unsigned long flags;
-
- spin_lock_irqsave(&lu->cmd_orb_lock, flags);
- while (!list_empty(&lu->cmd_orb_inuse)) {
- lh = lu->cmd_orb_inuse.next;
- cmd = list_entry(lh, struct sbp2_command_info, list);
- sbp2util_mark_command_completed(lu, cmd);
- if (cmd->Current_SCpnt) {
- cmd->Current_SCpnt->result = status << 16;
- cmd->Current_done(cmd->Current_SCpnt);
- }
- }
- spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
-
- return;
-}
-
-/*
- * Complete a regular SCSI command. Can be called in atomic context.
- */
-static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status,
- struct scsi_cmnd *SCpnt,
- void (*done)(struct scsi_cmnd *))
-{
- if (!SCpnt) {
- SBP2_ERR("SCpnt is NULL");
- return;
- }
-
- switch (scsi_status) {
- case SBP2_SCSI_STATUS_GOOD:
- SCpnt->result = DID_OK << 16;
- 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:
- SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
- break;
-
- case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
- SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
- SCpnt->result = DID_NO_CONNECT << 16;
- scsi_print_command(SCpnt);
- 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;
- scsi_print_command(SCpnt);
- break;
-
- default:
- SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
- SCpnt->result = DID_ERROR << 16;
- }
-
- /* 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(lu->ne)
- && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
- SBP2_ERR("Completing command with busy (bus reset)");
- SCpnt->result = DID_BUS_BUSY << 16;
- }
-
- /* Tell the SCSI stack that we're done with this command. */
- done(SCpnt);
-}
-
-static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
-{
- struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
-
- if (sdev->lun != 0 || sdev->id != lu->ud->id || sdev->channel != 0)
- return -ENODEV;
-
- lu->sdev = sdev;
- 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->workarounds & SBP2_WORKAROUND_INQUIRY_36)
- sdev->inquiry_len = 36;
- return 0;
-}
-
-static int sbp2scsi_slave_configure(struct scsi_device *sdev)
-{
- struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
-
- sdev->use_10_for_rw = 1;
-
- if (sbp2_exclusive_login)
- sdev->manage_start_stop = 1;
- if (sdev->type == TYPE_ROM)
- sdev->use_10_for_ms = 1;
- if (sdev->type == TYPE_DISK &&
- lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
- sdev->skip_ms_page_8 = 1;
- if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
- sdev->fix_capacity = 1;
- if (lu->workarounds & SBP2_WORKAROUND_POWER_CONDITION)
- sdev->start_stop_pwr_cond = 1;
- if (lu->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS)
- blk_queue_max_hw_sectors(sdev->request_queue, 128 * 1024 / 512);
-
- blk_queue_max_segment_size(sdev->request_queue, SBP2_MAX_SEG_SIZE);
- return 0;
-}
-
-static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
-{
- ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL;
- 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(struct scsi_cmnd *SCpnt)
-{
- struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
- struct sbp2_command_info *cmd;
- unsigned long flags;
-
- SBP2_INFO("aborting sbp2 command");
- scsi_print_command(SCpnt);
-
- if (sbp2util_node_is_available(lu)) {
- sbp2_agent_reset(lu, 1);
-
- /* Return a matching command structure to the free pool. */
- spin_lock_irqsave(&lu->cmd_orb_lock, flags);
- cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt);
- if (cmd) {
- sbp2util_mark_command_completed(lu, cmd);
- if (cmd->Current_SCpnt) {
- cmd->Current_SCpnt->result = DID_ABORT << 16;
- cmd->Current_done(cmd->Current_SCpnt);
- }
- }
- spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
-
- sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
- }
-
- return SUCCESS;
-}
-
-/*
- * Called by scsi stack when something has really gone wrong.
- */
-static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
-{
- struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
-
- SBP2_INFO("reset requested");
-
- if (sbp2util_node_is_available(lu)) {
- SBP2_INFO("generating sbp2 fetch agent reset");
- sbp2_agent_reset(lu, 1);
- }
-
- return SUCCESS;
-}
-
-static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct scsi_device *sdev;
- struct sbp2_lu *lu;
-
- if (!(sdev = to_scsi_device(dev)))
- return 0;
-
- if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0]))
- return 0;
-
- if (sbp2_long_sysfs_ieee1394_id)
- return sprintf(buf, "%016Lx:%06x:%04x\n",
- (unsigned long long)lu->ne->guid,
- lu->ud->directory_id, ORB_SET_LUN(lu->lun));
- else
- return sprintf(buf, "%016Lx:%d:%d\n",
- (unsigned long long)lu->ne->guid,
- lu->ud->id, ORB_SET_LUN(lu->lun));
-}
-
-MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
-MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
-MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
-MODULE_LICENSE("GPL");
-
-static int sbp2_module_init(void)
-{
- int ret;
-
- if (sbp2_serialize_io) {
- sbp2_shost_template.can_queue = 1;
- sbp2_shost_template.cmd_per_lun = 1;
- }
-
- sbp2_shost_template.max_sectors = sbp2_max_sectors;
-
- hpsb_register_highlevel(&sbp2_highlevel);
- ret = hpsb_register_protocol(&sbp2_driver);
- if (ret) {
- SBP2_ERR("Failed to register protocol");
- hpsb_unregister_highlevel(&sbp2_highlevel);
- return ret;
- }
- return 0;
-}
-
-static void __exit sbp2_module_exit(void)
-{
- hpsb_unregister_protocol(&sbp2_driver);
- hpsb_unregister_highlevel(&sbp2_highlevel);
-}
-
-module_init(sbp2_module_init);
-module_exit(sbp2_module_exit);