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marcus.erl |
/*
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* sbp2.c - SBP-2 protocol driver for IEEE-1394
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*
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* Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
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* jamesg@filanet.com (JSG)
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*
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* Copyright (C) 2003 Ben Collins <bcollins@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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* Brief Description:
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*
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* This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394
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* under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level
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* driver. It also registers as a SCSI lower-level driver in order to accept
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* SCSI commands for transport using SBP-2.
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*
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* You may access any attached SBP-2 (usually storage devices) as regular
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* SCSI devices. E.g. mount /dev/sda1, fdisk, mkfs, etc..
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*
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* See http://www.t10.org/drafts.htm#sbp2 for the final draft of the SBP-2
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* specification and for where to purchase the official standard.
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*
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* TODO:
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* - look into possible improvements of the SCSI error handlers
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* - handle Unit_Characteristics.mgt_ORB_timeout and .ORB_size
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* - handle Logical_Unit_Number.ordered
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* - handle src == 1 in status blocks
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* - reimplement the DMA mapping in absence of physical DMA so that
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* bus_to_virt is no longer required
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* - debug the handling of absent physical DMA
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* - replace CONFIG_IEEE1394_SBP2_PHYS_DMA by automatic detection
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* (this is easy but depends on the previous two TODO items)
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* - make the parameter serialize_io configurable per device
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* - move all requests to fetch agent registers into non-atomic context,
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* replace all usages of sbp2util_node_write_no_wait by true transactions
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* Grep for inline FIXME comments below.
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*/
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#include <linux/compiler.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/gfp.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/stat.h>
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#include <linux/string.h>
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#include <linux/stringify.h>
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#include <linux/types.h>
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#include <linux/wait.h>
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#include <linux/workqueue.h>
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#include <linux/scatterlist.h>
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#include <asm/byteorder.h>
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#include <asm/errno.h>
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#include <asm/param.h>
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#include <asm/system.h>
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#include <asm/types.h>
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#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
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#include <asm/io.h> /* for bus_to_virt */
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#endif
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_dbg.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include "csr1212.h"
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#include "highlevel.h"
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#include "hosts.h"
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#include "ieee1394.h"
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#include "ieee1394_core.h"
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#include "ieee1394_hotplug.h"
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#include "ieee1394_transactions.h"
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#include "ieee1394_types.h"
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#include "nodemgr.h"
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#include "sbp2.h"
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/*
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* Module load parameter definitions
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*/
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/*
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* Change max_speed on module load if you have a bad IEEE-1394
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* controller that has trouble running 2KB packets at 400mb.
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*
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* NOTE: On certain OHCI parts I have seen short packets on async transmit
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* (probably due to PCI latency/throughput issues with the part). You can
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* bump down the speed if you are running into problems.
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*/
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static int sbp2_max_speed = IEEE1394_SPEED_MAX;
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module_param_named(max_speed, sbp2_max_speed, int, 0644);
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MODULE_PARM_DESC(max_speed, "Force max speed "
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"(3 = 800Mb/s, 2 = 400Mb/s, 1 = 200Mb/s, 0 = 100Mb/s)");
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/*
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* Set serialize_io to 0 or N to use dynamically appended lists of command ORBs.
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* This is and always has been buggy in multiple subtle ways. See above TODOs.
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*/
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static int sbp2_serialize_io = 1;
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module_param_named(serialize_io, sbp2_serialize_io, bool, 0444);
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MODULE_PARM_DESC(serialize_io, "Serialize requests coming from SCSI drivers "
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"(default = Y, faster but buggy = N)");
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/*
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* Bump up max_sectors if you'd like to support very large sized
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* transfers. Please note that some older sbp2 bridge chips are broken for
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* transfers greater or equal to 128KB. Default is a value of 255
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* sectors, or just under 128KB (at 512 byte sector size). I can note that
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* the Oxsemi sbp2 chipsets have no problems supporting very large
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* transfer sizes.
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*/
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static int sbp2_max_sectors = SBP2_MAX_SECTORS;
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module_param_named(max_sectors, sbp2_max_sectors, int, 0444);
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MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported "
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"(default = " __stringify(SBP2_MAX_SECTORS) ")");
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/*
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* Exclusive login to sbp2 device? In most cases, the sbp2 driver should
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* do an exclusive login, as it's generally unsafe to have two hosts
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* talking to a single sbp2 device at the same time (filesystem coherency,
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* etc.). If you're running an sbp2 device that supports multiple logins,
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* and you're either running read-only filesystems or some sort of special
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* filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster
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* File System, or Lustre, then set exclusive_login to zero.
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*
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* So far only bridges from Oxford Semiconductor are known to support
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* concurrent logins. Depending on firmware, four or two concurrent logins
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* are possible on OXFW911 and newer Oxsemi bridges.
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*/
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static int sbp2_exclusive_login = 1;
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module_param_named(exclusive_login, sbp2_exclusive_login, bool, 0644);
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MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
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"(default = Y, use N for concurrent initiators)");
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/*
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* If any of the following workarounds is required for your device to work,
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* please submit the kernel messages logged by sbp2 to the linux1394-devel
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* mailing list.
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*
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* - 128kB max transfer
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* Limit transfer size. Necessary for some old bridges.
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*
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* - 36 byte inquiry
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* When scsi_mod probes the device, let the inquiry command look like that
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* from MS Windows.
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*
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* - skip mode page 8
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* Suppress sending of mode_sense for mode page 8 if the device pretends to
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* support the SCSI Primary Block commands instead of Reduced Block Commands.
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*
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* - fix capacity
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* Tell sd_mod to correct the last sector number reported by read_capacity.
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* Avoids access beyond actual disk limits on devices with an off-by-one bug.
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* Don't use this with devices which don't have this bug.
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*
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* - override internal blacklist
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* Instead of adding to the built-in blacklist, use only the workarounds
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* specified in the module load parameter.
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* Useful if a blacklist entry interfered with a non-broken device.
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*/
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static int sbp2_default_workarounds;
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module_param_named(workarounds, sbp2_default_workarounds, int, 0644);
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MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
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", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
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", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
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", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
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", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
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", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
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", or a combination)");
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/*
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* This influences the format of the sysfs attribute
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* /sys/bus/scsi/devices/.../ieee1394_id.
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*
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* The default format is like in older kernels: %016Lx:%d:%d
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* It contains the target's EUI-64, a number given to the logical unit by
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* the ieee1394 driver's nodemgr (starting at 0), and the LUN.
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*
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* The long format is: %016Lx:%06x:%04x
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* It contains the target's EUI-64, the unit directory's directory_ID as per
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* IEEE 1212 clause 7.7.19, and the LUN. This format comes closest to the
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* format of SBP(-3) target port and logical unit identifier as per SAM (SCSI
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* Architecture Model) rev.2 to 4 annex A. Therefore and because it is
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* independent of the implementation of the ieee1394 nodemgr, the longer format
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* is recommended for future use.
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*/
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static int sbp2_long_sysfs_ieee1394_id;
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module_param_named(long_ieee1394_id, sbp2_long_sysfs_ieee1394_id, bool, 0644);
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MODULE_PARM_DESC(long_ieee1394_id, "8+3+2 bytes format of ieee1394_id in sysfs "
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"(default = backwards-compatible = N, SAM-conforming = Y)");
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#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
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#define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
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/*
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* Globals
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*/
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static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32);
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static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *,
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void (*)(struct scsi_cmnd *));
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static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *);
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static int sbp2_start_device(struct sbp2_lu *);
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static void sbp2_remove_device(struct sbp2_lu *);
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static int sbp2_login_device(struct sbp2_lu *);
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static int sbp2_reconnect_device(struct sbp2_lu *);
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static int sbp2_logout_device(struct sbp2_lu *);
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static void sbp2_host_reset(struct hpsb_host *);
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static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *,
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u64, size_t, u16);
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static int sbp2_agent_reset(struct sbp2_lu *, int);
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static void sbp2_parse_unit_directory(struct sbp2_lu *,
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struct unit_directory *);
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static int sbp2_set_busy_timeout(struct sbp2_lu *);
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static int sbp2_max_speed_and_size(struct sbp2_lu *);
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static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
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static DEFINE_RWLOCK(sbp2_hi_logical_units_lock);
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static struct hpsb_highlevel sbp2_highlevel = {
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.name = SBP2_DEVICE_NAME,
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.host_reset = sbp2_host_reset,
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};
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static struct hpsb_address_ops sbp2_ops = {
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.write = sbp2_handle_status_write
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};
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#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
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static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *,
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u64, size_t, u16);
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static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64,
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size_t, u16);
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static struct hpsb_address_ops sbp2_physdma_ops = {
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.read = sbp2_handle_physdma_read,
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.write = sbp2_handle_physdma_write,
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};
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#endif
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/*
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* Interface to driver core and IEEE 1394 core
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*/
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static struct ieee1394_device_id sbp2_id_table[] = {
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{
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.match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
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.specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
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.version = SBP2_SW_VERSION_ENTRY & 0xffffff},
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{}
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};
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MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
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static int sbp2_probe(struct device *);
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static int sbp2_remove(struct device *);
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static int sbp2_update(struct unit_directory *);
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static struct hpsb_protocol_driver sbp2_driver = {
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.name = SBP2_DEVICE_NAME,
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.id_table = sbp2_id_table,
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.update = sbp2_update,
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.driver = {
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.probe = sbp2_probe,
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.remove = sbp2_remove,
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},
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};
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295 |
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296 |
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/*
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* Interface to SCSI core
|
298 |
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*/
|
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static int sbp2scsi_queuecommand(struct scsi_cmnd *,
|
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void (*)(struct scsi_cmnd *));
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static int sbp2scsi_abort(struct scsi_cmnd *);
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static int sbp2scsi_reset(struct scsi_cmnd *);
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static int sbp2scsi_slave_alloc(struct scsi_device *);
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static int sbp2scsi_slave_configure(struct scsi_device *);
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static void sbp2scsi_slave_destroy(struct scsi_device *);
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static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *,
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struct device_attribute *, char *);
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static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
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static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
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&dev_attr_ieee1394_id,
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NULL
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314 |
|
|
};
|
315 |
|
|
|
316 |
|
|
static struct scsi_host_template sbp2_shost_template = {
|
317 |
|
|
.module = THIS_MODULE,
|
318 |
|
|
.name = "SBP-2 IEEE-1394",
|
319 |
|
|
.proc_name = SBP2_DEVICE_NAME,
|
320 |
|
|
.queuecommand = sbp2scsi_queuecommand,
|
321 |
|
|
.eh_abort_handler = sbp2scsi_abort,
|
322 |
|
|
.eh_device_reset_handler = sbp2scsi_reset,
|
323 |
|
|
.slave_alloc = sbp2scsi_slave_alloc,
|
324 |
|
|
.slave_configure = sbp2scsi_slave_configure,
|
325 |
|
|
.slave_destroy = sbp2scsi_slave_destroy,
|
326 |
|
|
.this_id = -1,
|
327 |
|
|
.sg_tablesize = SG_ALL,
|
328 |
|
|
.use_clustering = ENABLE_CLUSTERING,
|
329 |
|
|
.cmd_per_lun = SBP2_MAX_CMDS,
|
330 |
|
|
.can_queue = SBP2_MAX_CMDS,
|
331 |
|
|
.sdev_attrs = sbp2_sysfs_sdev_attrs,
|
332 |
|
|
};
|
333 |
|
|
|
334 |
|
|
/* for match-all entries in sbp2_workarounds_table */
|
335 |
|
|
#define SBP2_ROM_VALUE_WILDCARD 0x1000000
|
336 |
|
|
|
337 |
|
|
/*
|
338 |
|
|
* List of devices with known bugs.
|
339 |
|
|
*
|
340 |
|
|
* The firmware_revision field, masked with 0xffff00, is the best indicator
|
341 |
|
|
* for the type of bridge chip of a device. It yields a few false positives
|
342 |
|
|
* but this did not break correctly behaving devices so far.
|
343 |
|
|
*/
|
344 |
|
|
static const struct {
|
345 |
|
|
u32 firmware_revision;
|
346 |
|
|
u32 model_id;
|
347 |
|
|
unsigned workarounds;
|
348 |
|
|
} sbp2_workarounds_table[] = {
|
349 |
|
|
/* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
|
350 |
|
|
.firmware_revision = 0x002800,
|
351 |
|
|
.model_id = 0x001010,
|
352 |
|
|
.workarounds = SBP2_WORKAROUND_INQUIRY_36 |
|
353 |
|
|
SBP2_WORKAROUND_MODE_SENSE_8,
|
354 |
|
|
},
|
355 |
|
|
/* Initio bridges, actually only needed for some older ones */ {
|
356 |
|
|
.firmware_revision = 0x000200,
|
357 |
|
|
.model_id = SBP2_ROM_VALUE_WILDCARD,
|
358 |
|
|
.workarounds = SBP2_WORKAROUND_INQUIRY_36,
|
359 |
|
|
},
|
360 |
|
|
/* Symbios bridge */ {
|
361 |
|
|
.firmware_revision = 0xa0b800,
|
362 |
|
|
.model_id = SBP2_ROM_VALUE_WILDCARD,
|
363 |
|
|
.workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
|
364 |
|
|
},
|
365 |
|
|
/* iPod 4th generation */ {
|
366 |
|
|
.firmware_revision = 0x0a2700,
|
367 |
|
|
.model_id = 0x000021,
|
368 |
|
|
.workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
|
369 |
|
|
},
|
370 |
|
|
/* iPod mini */ {
|
371 |
|
|
.firmware_revision = 0x0a2700,
|
372 |
|
|
.model_id = 0x000023,
|
373 |
|
|
.workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
|
374 |
|
|
},
|
375 |
|
|
/* iPod Photo */ {
|
376 |
|
|
.firmware_revision = 0x0a2700,
|
377 |
|
|
.model_id = 0x00007e,
|
378 |
|
|
.workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
|
379 |
|
|
}
|
380 |
|
|
};
|
381 |
|
|
|
382 |
|
|
/**************************************
|
383 |
|
|
* General utility functions
|
384 |
|
|
**************************************/
|
385 |
|
|
|
386 |
|
|
#ifndef __BIG_ENDIAN
|
387 |
|
|
/*
|
388 |
|
|
* Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
|
389 |
|
|
*/
|
390 |
|
|
static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
|
391 |
|
|
{
|
392 |
|
|
u32 *temp = buffer;
|
393 |
|
|
|
394 |
|
|
for (length = (length >> 2); length--; )
|
395 |
|
|
temp[length] = be32_to_cpu(temp[length]);
|
396 |
|
|
}
|
397 |
|
|
|
398 |
|
|
/*
|
399 |
|
|
* Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
|
400 |
|
|
*/
|
401 |
|
|
static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
|
402 |
|
|
{
|
403 |
|
|
u32 *temp = buffer;
|
404 |
|
|
|
405 |
|
|
for (length = (length >> 2); length--; )
|
406 |
|
|
temp[length] = cpu_to_be32(temp[length]);
|
407 |
|
|
}
|
408 |
|
|
#else /* BIG_ENDIAN */
|
409 |
|
|
/* Why waste the cpu cycles? */
|
410 |
|
|
#define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0)
|
411 |
|
|
#define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0)
|
412 |
|
|
#endif
|
413 |
|
|
|
414 |
|
|
static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq);
|
415 |
|
|
|
416 |
|
|
/*
|
417 |
|
|
* Waits for completion of an SBP-2 access request.
|
418 |
|
|
* Returns nonzero if timed out or prematurely interrupted.
|
419 |
|
|
*/
|
420 |
|
|
static int sbp2util_access_timeout(struct sbp2_lu *lu, int timeout)
|
421 |
|
|
{
|
422 |
|
|
long leftover;
|
423 |
|
|
|
424 |
|
|
leftover = wait_event_interruptible_timeout(
|
425 |
|
|
sbp2_access_wq, lu->access_complete, timeout);
|
426 |
|
|
lu->access_complete = 0;
|
427 |
|
|
return leftover <= 0;
|
428 |
|
|
}
|
429 |
|
|
|
430 |
|
|
static void sbp2_free_packet(void *packet)
|
431 |
|
|
{
|
432 |
|
|
hpsb_free_tlabel(packet);
|
433 |
|
|
hpsb_free_packet(packet);
|
434 |
|
|
}
|
435 |
|
|
|
436 |
|
|
/*
|
437 |
|
|
* This is much like hpsb_node_write(), except it ignores the response
|
438 |
|
|
* subaction and returns immediately. Can be used from atomic context.
|
439 |
|
|
*/
|
440 |
|
|
static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
|
441 |
|
|
quadlet_t *buf, size_t len)
|
442 |
|
|
{
|
443 |
|
|
struct hpsb_packet *packet;
|
444 |
|
|
|
445 |
|
|
packet = hpsb_make_writepacket(ne->host, ne->nodeid, addr, buf, len);
|
446 |
|
|
if (!packet)
|
447 |
|
|
return -ENOMEM;
|
448 |
|
|
|
449 |
|
|
hpsb_set_packet_complete_task(packet, sbp2_free_packet, packet);
|
450 |
|
|
hpsb_node_fill_packet(ne, packet);
|
451 |
|
|
if (hpsb_send_packet(packet) < 0) {
|
452 |
|
|
sbp2_free_packet(packet);
|
453 |
|
|
return -EIO;
|
454 |
|
|
}
|
455 |
|
|
return 0;
|
456 |
|
|
}
|
457 |
|
|
|
458 |
|
|
static void sbp2util_notify_fetch_agent(struct sbp2_lu *lu, u64 offset,
|
459 |
|
|
quadlet_t *data, size_t len)
|
460 |
|
|
{
|
461 |
|
|
/* There is a small window after a bus reset within which the node
|
462 |
|
|
* entry's generation is current but the reconnect wasn't completed. */
|
463 |
|
|
if (unlikely(atomic_read(&lu->state) == SBP2LU_STATE_IN_RESET))
|
464 |
|
|
return;
|
465 |
|
|
|
466 |
|
|
if (hpsb_node_write(lu->ne, lu->command_block_agent_addr + offset,
|
467 |
|
|
data, len))
|
468 |
|
|
SBP2_ERR("sbp2util_notify_fetch_agent failed.");
|
469 |
|
|
|
470 |
|
|
/* Now accept new SCSI commands, unless a bus reset happended during
|
471 |
|
|
* hpsb_node_write. */
|
472 |
|
|
if (likely(atomic_read(&lu->state) != SBP2LU_STATE_IN_RESET))
|
473 |
|
|
scsi_unblock_requests(lu->shost);
|
474 |
|
|
}
|
475 |
|
|
|
476 |
|
|
static void sbp2util_write_orb_pointer(struct work_struct *work)
|
477 |
|
|
{
|
478 |
|
|
struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
|
479 |
|
|
quadlet_t data[2];
|
480 |
|
|
|
481 |
|
|
data[0] = ORB_SET_NODE_ID(lu->hi->host->node_id);
|
482 |
|
|
data[1] = lu->last_orb_dma;
|
483 |
|
|
sbp2util_cpu_to_be32_buffer(data, 8);
|
484 |
|
|
sbp2util_notify_fetch_agent(lu, SBP2_ORB_POINTER_OFFSET, data, 8);
|
485 |
|
|
}
|
486 |
|
|
|
487 |
|
|
static void sbp2util_write_doorbell(struct work_struct *work)
|
488 |
|
|
{
|
489 |
|
|
struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
|
490 |
|
|
|
491 |
|
|
sbp2util_notify_fetch_agent(lu, SBP2_DOORBELL_OFFSET, NULL, 4);
|
492 |
|
|
}
|
493 |
|
|
|
494 |
|
|
static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu)
|
495 |
|
|
{
|
496 |
|
|
struct sbp2_fwhost_info *hi = lu->hi;
|
497 |
|
|
struct sbp2_command_info *cmd;
|
498 |
|
|
int i, orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS;
|
499 |
|
|
|
500 |
|
|
for (i = 0; i < orbs; i++) {
|
501 |
|
|
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
|
502 |
|
|
if (!cmd)
|
503 |
|
|
return -ENOMEM;
|
504 |
|
|
cmd->command_orb_dma = dma_map_single(hi->host->device.parent,
|
505 |
|
|
&cmd->command_orb,
|
506 |
|
|
sizeof(struct sbp2_command_orb),
|
507 |
|
|
DMA_TO_DEVICE);
|
508 |
|
|
cmd->sge_dma = dma_map_single(hi->host->device.parent,
|
509 |
|
|
&cmd->scatter_gather_element,
|
510 |
|
|
sizeof(cmd->scatter_gather_element),
|
511 |
|
|
DMA_TO_DEVICE);
|
512 |
|
|
INIT_LIST_HEAD(&cmd->list);
|
513 |
|
|
list_add_tail(&cmd->list, &lu->cmd_orb_completed);
|
514 |
|
|
}
|
515 |
|
|
return 0;
|
516 |
|
|
}
|
517 |
|
|
|
518 |
|
|
static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu,
|
519 |
|
|
struct hpsb_host *host)
|
520 |
|
|
{
|
521 |
|
|
struct list_head *lh, *next;
|
522 |
|
|
struct sbp2_command_info *cmd;
|
523 |
|
|
unsigned long flags;
|
524 |
|
|
|
525 |
|
|
spin_lock_irqsave(&lu->cmd_orb_lock, flags);
|
526 |
|
|
if (!list_empty(&lu->cmd_orb_completed))
|
527 |
|
|
list_for_each_safe(lh, next, &lu->cmd_orb_completed) {
|
528 |
|
|
cmd = list_entry(lh, struct sbp2_command_info, list);
|
529 |
|
|
dma_unmap_single(host->device.parent,
|
530 |
|
|
cmd->command_orb_dma,
|
531 |
|
|
sizeof(struct sbp2_command_orb),
|
532 |
|
|
DMA_TO_DEVICE);
|
533 |
|
|
dma_unmap_single(host->device.parent, cmd->sge_dma,
|
534 |
|
|
sizeof(cmd->scatter_gather_element),
|
535 |
|
|
DMA_TO_DEVICE);
|
536 |
|
|
kfree(cmd);
|
537 |
|
|
}
|
538 |
|
|
spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
|
539 |
|
|
return;
|
540 |
|
|
}
|
541 |
|
|
|
542 |
|
|
/*
|
543 |
|
|
* Finds the sbp2_command for a given outstanding command ORB.
|
544 |
|
|
* Only looks at the in-use list.
|
545 |
|
|
*/
|
546 |
|
|
static struct sbp2_command_info *sbp2util_find_command_for_orb(
|
547 |
|
|
struct sbp2_lu *lu, dma_addr_t orb)
|
548 |
|
|
{
|
549 |
|
|
struct sbp2_command_info *cmd;
|
550 |
|
|
unsigned long flags;
|
551 |
|
|
|
552 |
|
|
spin_lock_irqsave(&lu->cmd_orb_lock, flags);
|
553 |
|
|
if (!list_empty(&lu->cmd_orb_inuse))
|
554 |
|
|
list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
|
555 |
|
|
if (cmd->command_orb_dma == orb) {
|
556 |
|
|
spin_unlock_irqrestore(
|
557 |
|
|
&lu->cmd_orb_lock, flags);
|
558 |
|
|
return cmd;
|
559 |
|
|
}
|
560 |
|
|
spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
|
561 |
|
|
return NULL;
|
562 |
|
|
}
|
563 |
|
|
|
564 |
|
|
/*
|
565 |
|
|
* Finds the sbp2_command for a given outstanding SCpnt.
|
566 |
|
|
* Only looks at the in-use list.
|
567 |
|
|
* Must be called with lu->cmd_orb_lock held.
|
568 |
|
|
*/
|
569 |
|
|
static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(
|
570 |
|
|
struct sbp2_lu *lu, void *SCpnt)
|
571 |
|
|
{
|
572 |
|
|
struct sbp2_command_info *cmd;
|
573 |
|
|
|
574 |
|
|
if (!list_empty(&lu->cmd_orb_inuse))
|
575 |
|
|
list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
|
576 |
|
|
if (cmd->Current_SCpnt == SCpnt)
|
577 |
|
|
return cmd;
|
578 |
|
|
return NULL;
|
579 |
|
|
}
|
580 |
|
|
|
581 |
|
|
static struct sbp2_command_info *sbp2util_allocate_command_orb(
|
582 |
|
|
struct sbp2_lu *lu,
|
583 |
|
|
struct scsi_cmnd *Current_SCpnt,
|
584 |
|
|
void (*Current_done)(struct scsi_cmnd *))
|
585 |
|
|
{
|
586 |
|
|
struct list_head *lh;
|
587 |
|
|
struct sbp2_command_info *cmd = NULL;
|
588 |
|
|
unsigned long flags;
|
589 |
|
|
|
590 |
|
|
spin_lock_irqsave(&lu->cmd_orb_lock, flags);
|
591 |
|
|
if (!list_empty(&lu->cmd_orb_completed)) {
|
592 |
|
|
lh = lu->cmd_orb_completed.next;
|
593 |
|
|
list_del(lh);
|
594 |
|
|
cmd = list_entry(lh, struct sbp2_command_info, list);
|
595 |
|
|
cmd->Current_done = Current_done;
|
596 |
|
|
cmd->Current_SCpnt = Current_SCpnt;
|
597 |
|
|
list_add_tail(&cmd->list, &lu->cmd_orb_inuse);
|
598 |
|
|
} else
|
599 |
|
|
SBP2_ERR("%s: no orbs available", __FUNCTION__);
|
600 |
|
|
spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
|
601 |
|
|
return cmd;
|
602 |
|
|
}
|
603 |
|
|
|
604 |
|
|
/*
|
605 |
|
|
* Unmaps the DMAs of a command and moves the command to the completed ORB list.
|
606 |
|
|
* Must be called with lu->cmd_orb_lock held.
|
607 |
|
|
*/
|
608 |
|
|
static void sbp2util_mark_command_completed(struct sbp2_lu *lu,
|
609 |
|
|
struct sbp2_command_info *cmd)
|
610 |
|
|
{
|
611 |
|
|
struct hpsb_host *host = lu->ud->ne->host;
|
612 |
|
|
|
613 |
|
|
if (cmd->cmd_dma) {
|
614 |
|
|
if (cmd->dma_type == CMD_DMA_SINGLE)
|
615 |
|
|
dma_unmap_single(host->device.parent, cmd->cmd_dma,
|
616 |
|
|
cmd->dma_size, cmd->dma_dir);
|
617 |
|
|
else if (cmd->dma_type == CMD_DMA_PAGE)
|
618 |
|
|
dma_unmap_page(host->device.parent, cmd->cmd_dma,
|
619 |
|
|
cmd->dma_size, cmd->dma_dir);
|
620 |
|
|
/* XXX: Check for CMD_DMA_NONE bug */
|
621 |
|
|
cmd->dma_type = CMD_DMA_NONE;
|
622 |
|
|
cmd->cmd_dma = 0;
|
623 |
|
|
}
|
624 |
|
|
if (cmd->sge_buffer) {
|
625 |
|
|
dma_unmap_sg(host->device.parent, cmd->sge_buffer,
|
626 |
|
|
cmd->dma_size, cmd->dma_dir);
|
627 |
|
|
cmd->sge_buffer = NULL;
|
628 |
|
|
}
|
629 |
|
|
list_move_tail(&cmd->list, &lu->cmd_orb_completed);
|
630 |
|
|
}
|
631 |
|
|
|
632 |
|
|
/*
|
633 |
|
|
* Is lu valid? Is the 1394 node still present?
|
634 |
|
|
*/
|
635 |
|
|
static inline int sbp2util_node_is_available(struct sbp2_lu *lu)
|
636 |
|
|
{
|
637 |
|
|
return lu && lu->ne && !lu->ne->in_limbo;
|
638 |
|
|
}
|
639 |
|
|
|
640 |
|
|
/*********************************************
|
641 |
|
|
* IEEE-1394 core driver stack related section
|
642 |
|
|
*********************************************/
|
643 |
|
|
|
644 |
|
|
static int sbp2_probe(struct device *dev)
|
645 |
|
|
{
|
646 |
|
|
struct unit_directory *ud;
|
647 |
|
|
struct sbp2_lu *lu;
|
648 |
|
|
|
649 |
|
|
ud = container_of(dev, struct unit_directory, device);
|
650 |
|
|
|
651 |
|
|
/* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
|
652 |
|
|
* instead. */
|
653 |
|
|
if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
|
654 |
|
|
return -ENODEV;
|
655 |
|
|
|
656 |
|
|
lu = sbp2_alloc_device(ud);
|
657 |
|
|
if (!lu)
|
658 |
|
|
return -ENOMEM;
|
659 |
|
|
|
660 |
|
|
sbp2_parse_unit_directory(lu, ud);
|
661 |
|
|
return sbp2_start_device(lu);
|
662 |
|
|
}
|
663 |
|
|
|
664 |
|
|
static int sbp2_remove(struct device *dev)
|
665 |
|
|
{
|
666 |
|
|
struct unit_directory *ud;
|
667 |
|
|
struct sbp2_lu *lu;
|
668 |
|
|
struct scsi_device *sdev;
|
669 |
|
|
|
670 |
|
|
ud = container_of(dev, struct unit_directory, device);
|
671 |
|
|
lu = ud->device.driver_data;
|
672 |
|
|
if (!lu)
|
673 |
|
|
return 0;
|
674 |
|
|
|
675 |
|
|
if (lu->shost) {
|
676 |
|
|
/* Get rid of enqueued commands if there is no chance to
|
677 |
|
|
* send them. */
|
678 |
|
|
if (!sbp2util_node_is_available(lu))
|
679 |
|
|
sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT);
|
680 |
|
|
/* scsi_remove_device() may trigger shutdown functions of SCSI
|
681 |
|
|
* highlevel drivers which would deadlock if blocked. */
|
682 |
|
|
atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN);
|
683 |
|
|
scsi_unblock_requests(lu->shost);
|
684 |
|
|
}
|
685 |
|
|
sdev = lu->sdev;
|
686 |
|
|
if (sdev) {
|
687 |
|
|
lu->sdev = NULL;
|
688 |
|
|
scsi_remove_device(sdev);
|
689 |
|
|
}
|
690 |
|
|
|
691 |
|
|
sbp2_logout_device(lu);
|
692 |
|
|
sbp2_remove_device(lu);
|
693 |
|
|
|
694 |
|
|
return 0;
|
695 |
|
|
}
|
696 |
|
|
|
697 |
|
|
static int sbp2_update(struct unit_directory *ud)
|
698 |
|
|
{
|
699 |
|
|
struct sbp2_lu *lu = ud->device.driver_data;
|
700 |
|
|
|
701 |
|
|
if (sbp2_reconnect_device(lu)) {
|
702 |
|
|
/* Reconnect has failed. Perhaps we didn't reconnect fast
|
703 |
|
|
* enough. Try a regular login, but first log out just in
|
704 |
|
|
* case of any weirdness. */
|
705 |
|
|
sbp2_logout_device(lu);
|
706 |
|
|
|
707 |
|
|
if (sbp2_login_device(lu)) {
|
708 |
|
|
/* Login failed too, just fail, and the backend
|
709 |
|
|
* will call our sbp2_remove for us */
|
710 |
|
|
SBP2_ERR("Failed to reconnect to sbp2 device!");
|
711 |
|
|
return -EBUSY;
|
712 |
|
|
}
|
713 |
|
|
}
|
714 |
|
|
|
715 |
|
|
sbp2_set_busy_timeout(lu);
|
716 |
|
|
sbp2_agent_reset(lu, 1);
|
717 |
|
|
sbp2_max_speed_and_size(lu);
|
718 |
|
|
|
719 |
|
|
/* Complete any pending commands with busy (so they get retried)
|
720 |
|
|
* and remove them from our queue. */
|
721 |
|
|
sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
|
722 |
|
|
|
723 |
|
|
/* Accept new commands unless there was another bus reset in the
|
724 |
|
|
* meantime. */
|
725 |
|
|
if (hpsb_node_entry_valid(lu->ne)) {
|
726 |
|
|
atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
|
727 |
|
|
scsi_unblock_requests(lu->shost);
|
728 |
|
|
}
|
729 |
|
|
return 0;
|
730 |
|
|
}
|
731 |
|
|
|
732 |
|
|
static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud)
|
733 |
|
|
{
|
734 |
|
|
struct sbp2_fwhost_info *hi;
|
735 |
|
|
struct Scsi_Host *shost = NULL;
|
736 |
|
|
struct sbp2_lu *lu = NULL;
|
737 |
|
|
unsigned long flags;
|
738 |
|
|
|
739 |
|
|
lu = kzalloc(sizeof(*lu), GFP_KERNEL);
|
740 |
|
|
if (!lu) {
|
741 |
|
|
SBP2_ERR("failed to create lu");
|
742 |
|
|
goto failed_alloc;
|
743 |
|
|
}
|
744 |
|
|
|
745 |
|
|
lu->ne = ud->ne;
|
746 |
|
|
lu->ud = ud;
|
747 |
|
|
lu->speed_code = IEEE1394_SPEED_100;
|
748 |
|
|
lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
|
749 |
|
|
lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
|
750 |
|
|
INIT_LIST_HEAD(&lu->cmd_orb_inuse);
|
751 |
|
|
INIT_LIST_HEAD(&lu->cmd_orb_completed);
|
752 |
|
|
INIT_LIST_HEAD(&lu->lu_list);
|
753 |
|
|
spin_lock_init(&lu->cmd_orb_lock);
|
754 |
|
|
atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
|
755 |
|
|
INIT_WORK(&lu->protocol_work, NULL);
|
756 |
|
|
|
757 |
|
|
ud->device.driver_data = lu;
|
758 |
|
|
|
759 |
|
|
hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
|
760 |
|
|
if (!hi) {
|
761 |
|
|
hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host,
|
762 |
|
|
sizeof(*hi));
|
763 |
|
|
if (!hi) {
|
764 |
|
|
SBP2_ERR("failed to allocate hostinfo");
|
765 |
|
|
goto failed_alloc;
|
766 |
|
|
}
|
767 |
|
|
hi->host = ud->ne->host;
|
768 |
|
|
INIT_LIST_HEAD(&hi->logical_units);
|
769 |
|
|
|
770 |
|
|
#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
|
771 |
|
|
/* Handle data movement if physical dma is not
|
772 |
|
|
* enabled or not supported on host controller */
|
773 |
|
|
if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
|
774 |
|
|
&sbp2_physdma_ops,
|
775 |
|
|
0x0ULL, 0xfffffffcULL)) {
|
776 |
|
|
SBP2_ERR("failed to register lower 4GB address range");
|
777 |
|
|
goto failed_alloc;
|
778 |
|
|
}
|
779 |
|
|
#endif
|
780 |
|
|
}
|
781 |
|
|
|
782 |
|
|
/* Prevent unloading of the 1394 host */
|
783 |
|
|
if (!try_module_get(hi->host->driver->owner)) {
|
784 |
|
|
SBP2_ERR("failed to get a reference on 1394 host driver");
|
785 |
|
|
goto failed_alloc;
|
786 |
|
|
}
|
787 |
|
|
|
788 |
|
|
lu->hi = hi;
|
789 |
|
|
|
790 |
|
|
write_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
|
791 |
|
|
list_add_tail(&lu->lu_list, &hi->logical_units);
|
792 |
|
|
write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
|
793 |
|
|
|
794 |
|
|
/* Register the status FIFO address range. We could use the same FIFO
|
795 |
|
|
* for targets at different nodes. However we need different FIFOs per
|
796 |
|
|
* target in order to support multi-unit devices.
|
797 |
|
|
* The FIFO is located out of the local host controller's physical range
|
798 |
|
|
* but, if possible, within the posted write area. Status writes will
|
799 |
|
|
* then be performed as unified transactions. This slightly reduces
|
800 |
|
|
* bandwidth usage, and some Prolific based devices seem to require it.
|
801 |
|
|
*/
|
802 |
|
|
lu->status_fifo_addr = hpsb_allocate_and_register_addrspace(
|
803 |
|
|
&sbp2_highlevel, ud->ne->host, &sbp2_ops,
|
804 |
|
|
sizeof(struct sbp2_status_block), sizeof(quadlet_t),
|
805 |
|
|
ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
|
806 |
|
|
if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
|
807 |
|
|
SBP2_ERR("failed to allocate status FIFO address range");
|
808 |
|
|
goto failed_alloc;
|
809 |
|
|
}
|
810 |
|
|
|
811 |
|
|
shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long));
|
812 |
|
|
if (!shost) {
|
813 |
|
|
SBP2_ERR("failed to register scsi host");
|
814 |
|
|
goto failed_alloc;
|
815 |
|
|
}
|
816 |
|
|
|
817 |
|
|
shost->hostdata[0] = (unsigned long)lu;
|
818 |
|
|
|
819 |
|
|
if (!scsi_add_host(shost, &ud->device)) {
|
820 |
|
|
lu->shost = shost;
|
821 |
|
|
return lu;
|
822 |
|
|
}
|
823 |
|
|
|
824 |
|
|
SBP2_ERR("failed to add scsi host");
|
825 |
|
|
scsi_host_put(shost);
|
826 |
|
|
|
827 |
|
|
failed_alloc:
|
828 |
|
|
sbp2_remove_device(lu);
|
829 |
|
|
return NULL;
|
830 |
|
|
}
|
831 |
|
|
|
832 |
|
|
static void sbp2_host_reset(struct hpsb_host *host)
|
833 |
|
|
{
|
834 |
|
|
struct sbp2_fwhost_info *hi;
|
835 |
|
|
struct sbp2_lu *lu;
|
836 |
|
|
unsigned long flags;
|
837 |
|
|
|
838 |
|
|
hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
|
839 |
|
|
if (!hi)
|
840 |
|
|
return;
|
841 |
|
|
|
842 |
|
|
read_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
|
843 |
|
|
list_for_each_entry(lu, &hi->logical_units, lu_list)
|
844 |
|
|
if (likely(atomic_read(&lu->state) !=
|
845 |
|
|
SBP2LU_STATE_IN_SHUTDOWN)) {
|
846 |
|
|
atomic_set(&lu->state, SBP2LU_STATE_IN_RESET);
|
847 |
|
|
scsi_block_requests(lu->shost);
|
848 |
|
|
}
|
849 |
|
|
read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
|
850 |
|
|
}
|
851 |
|
|
|
852 |
|
|
static int sbp2_start_device(struct sbp2_lu *lu)
|
853 |
|
|
{
|
854 |
|
|
struct sbp2_fwhost_info *hi = lu->hi;
|
855 |
|
|
int error;
|
856 |
|
|
|
857 |
|
|
lu->login_response = dma_alloc_coherent(hi->host->device.parent,
|
858 |
|
|
sizeof(struct sbp2_login_response),
|
859 |
|
|
&lu->login_response_dma, GFP_KERNEL);
|
860 |
|
|
if (!lu->login_response)
|
861 |
|
|
goto alloc_fail;
|
862 |
|
|
|
863 |
|
|
lu->query_logins_orb = dma_alloc_coherent(hi->host->device.parent,
|
864 |
|
|
sizeof(struct sbp2_query_logins_orb),
|
865 |
|
|
&lu->query_logins_orb_dma, GFP_KERNEL);
|
866 |
|
|
if (!lu->query_logins_orb)
|
867 |
|
|
goto alloc_fail;
|
868 |
|
|
|
869 |
|
|
lu->query_logins_response = dma_alloc_coherent(hi->host->device.parent,
|
870 |
|
|
sizeof(struct sbp2_query_logins_response),
|
871 |
|
|
&lu->query_logins_response_dma, GFP_KERNEL);
|
872 |
|
|
if (!lu->query_logins_response)
|
873 |
|
|
goto alloc_fail;
|
874 |
|
|
|
875 |
|
|
lu->reconnect_orb = dma_alloc_coherent(hi->host->device.parent,
|
876 |
|
|
sizeof(struct sbp2_reconnect_orb),
|
877 |
|
|
&lu->reconnect_orb_dma, GFP_KERNEL);
|
878 |
|
|
if (!lu->reconnect_orb)
|
879 |
|
|
goto alloc_fail;
|
880 |
|
|
|
881 |
|
|
lu->logout_orb = dma_alloc_coherent(hi->host->device.parent,
|
882 |
|
|
sizeof(struct sbp2_logout_orb),
|
883 |
|
|
&lu->logout_orb_dma, GFP_KERNEL);
|
884 |
|
|
if (!lu->logout_orb)
|
885 |
|
|
goto alloc_fail;
|
886 |
|
|
|
887 |
|
|
lu->login_orb = dma_alloc_coherent(hi->host->device.parent,
|
888 |
|
|
sizeof(struct sbp2_login_orb),
|
889 |
|
|
&lu->login_orb_dma, GFP_KERNEL);
|
890 |
|
|
if (!lu->login_orb)
|
891 |
|
|
goto alloc_fail;
|
892 |
|
|
|
893 |
|
|
if (sbp2util_create_command_orb_pool(lu))
|
894 |
|
|
goto alloc_fail;
|
895 |
|
|
|
896 |
|
|
/* Wait a second before trying to log in. Previously logged in
|
897 |
|
|
* initiators need a chance to reconnect. */
|
898 |
|
|
if (msleep_interruptible(1000)) {
|
899 |
|
|
sbp2_remove_device(lu);
|
900 |
|
|
return -EINTR;
|
901 |
|
|
}
|
902 |
|
|
|
903 |
|
|
if (sbp2_login_device(lu)) {
|
904 |
|
|
sbp2_remove_device(lu);
|
905 |
|
|
return -EBUSY;
|
906 |
|
|
}
|
907 |
|
|
|
908 |
|
|
sbp2_set_busy_timeout(lu);
|
909 |
|
|
sbp2_agent_reset(lu, 1);
|
910 |
|
|
sbp2_max_speed_and_size(lu);
|
911 |
|
|
|
912 |
|
|
error = scsi_add_device(lu->shost, 0, lu->ud->id, 0);
|
913 |
|
|
if (error) {
|
914 |
|
|
SBP2_ERR("scsi_add_device failed");
|
915 |
|
|
sbp2_logout_device(lu);
|
916 |
|
|
sbp2_remove_device(lu);
|
917 |
|
|
return error;
|
918 |
|
|
}
|
919 |
|
|
|
920 |
|
|
return 0;
|
921 |
|
|
|
922 |
|
|
alloc_fail:
|
923 |
|
|
SBP2_ERR("Could not allocate memory for lu");
|
924 |
|
|
sbp2_remove_device(lu);
|
925 |
|
|
return -ENOMEM;
|
926 |
|
|
}
|
927 |
|
|
|
928 |
|
|
static void sbp2_remove_device(struct sbp2_lu *lu)
|
929 |
|
|
{
|
930 |
|
|
struct sbp2_fwhost_info *hi;
|
931 |
|
|
unsigned long flags;
|
932 |
|
|
|
933 |
|
|
if (!lu)
|
934 |
|
|
return;
|
935 |
|
|
hi = lu->hi;
|
936 |
|
|
if (!hi)
|
937 |
|
|
goto no_hi;
|
938 |
|
|
|
939 |
|
|
if (lu->shost) {
|
940 |
|
|
scsi_remove_host(lu->shost);
|
941 |
|
|
scsi_host_put(lu->shost);
|
942 |
|
|
}
|
943 |
|
|
flush_scheduled_work();
|
944 |
|
|
sbp2util_remove_command_orb_pool(lu, hi->host);
|
945 |
|
|
|
946 |
|
|
write_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
|
947 |
|
|
list_del(&lu->lu_list);
|
948 |
|
|
write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
|
949 |
|
|
|
950 |
|
|
if (lu->login_response)
|
951 |
|
|
dma_free_coherent(hi->host->device.parent,
|
952 |
|
|
sizeof(struct sbp2_login_response),
|
953 |
|
|
lu->login_response,
|
954 |
|
|
lu->login_response_dma);
|
955 |
|
|
if (lu->login_orb)
|
956 |
|
|
dma_free_coherent(hi->host->device.parent,
|
957 |
|
|
sizeof(struct sbp2_login_orb),
|
958 |
|
|
lu->login_orb,
|
959 |
|
|
lu->login_orb_dma);
|
960 |
|
|
if (lu->reconnect_orb)
|
961 |
|
|
dma_free_coherent(hi->host->device.parent,
|
962 |
|
|
sizeof(struct sbp2_reconnect_orb),
|
963 |
|
|
lu->reconnect_orb,
|
964 |
|
|
lu->reconnect_orb_dma);
|
965 |
|
|
if (lu->logout_orb)
|
966 |
|
|
dma_free_coherent(hi->host->device.parent,
|
967 |
|
|
sizeof(struct sbp2_logout_orb),
|
968 |
|
|
lu->logout_orb,
|
969 |
|
|
lu->logout_orb_dma);
|
970 |
|
|
if (lu->query_logins_orb)
|
971 |
|
|
dma_free_coherent(hi->host->device.parent,
|
972 |
|
|
sizeof(struct sbp2_query_logins_orb),
|
973 |
|
|
lu->query_logins_orb,
|
974 |
|
|
lu->query_logins_orb_dma);
|
975 |
|
|
if (lu->query_logins_response)
|
976 |
|
|
dma_free_coherent(hi->host->device.parent,
|
977 |
|
|
sizeof(struct sbp2_query_logins_response),
|
978 |
|
|
lu->query_logins_response,
|
979 |
|
|
lu->query_logins_response_dma);
|
980 |
|
|
|
981 |
|
|
if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
|
982 |
|
|
hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
|
983 |
|
|
lu->status_fifo_addr);
|
984 |
|
|
|
985 |
|
|
lu->ud->device.driver_data = NULL;
|
986 |
|
|
|
987 |
|
|
module_put(hi->host->driver->owner);
|
988 |
|
|
no_hi:
|
989 |
|
|
kfree(lu);
|
990 |
|
|
}
|
991 |
|
|
|
992 |
|
|
#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
|
993 |
|
|
/*
|
994 |
|
|
* Deal with write requests on adapters which do not support physical DMA or
|
995 |
|
|
* have it switched off.
|
996 |
|
|
*/
|
997 |
|
|
static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
|
998 |
|
|
int destid, quadlet_t *data, u64 addr,
|
999 |
|
|
size_t length, u16 flags)
|
1000 |
|
|
{
|
1001 |
|
|
memcpy(bus_to_virt((u32) addr), data, length);
|
1002 |
|
|
return RCODE_COMPLETE;
|
1003 |
|
|
}
|
1004 |
|
|
|
1005 |
|
|
/*
|
1006 |
|
|
* Deal with read requests on adapters which do not support physical DMA or
|
1007 |
|
|
* have it switched off.
|
1008 |
|
|
*/
|
1009 |
|
|
static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
|
1010 |
|
|
quadlet_t *data, u64 addr, size_t length,
|
1011 |
|
|
u16 flags)
|
1012 |
|
|
{
|
1013 |
|
|
memcpy(data, bus_to_virt((u32) addr), length);
|
1014 |
|
|
return RCODE_COMPLETE;
|
1015 |
|
|
}
|
1016 |
|
|
#endif
|
1017 |
|
|
|
1018 |
|
|
/**************************************
|
1019 |
|
|
* SBP-2 protocol related section
|
1020 |
|
|
**************************************/
|
1021 |
|
|
|
1022 |
|
|
static int sbp2_query_logins(struct sbp2_lu *lu)
|
1023 |
|
|
{
|
1024 |
|
|
struct sbp2_fwhost_info *hi = lu->hi;
|
1025 |
|
|
quadlet_t data[2];
|
1026 |
|
|
int max_logins;
|
1027 |
|
|
int active_logins;
|
1028 |
|
|
|
1029 |
|
|
lu->query_logins_orb->reserved1 = 0x0;
|
1030 |
|
|
lu->query_logins_orb->reserved2 = 0x0;
|
1031 |
|
|
|
1032 |
|
|
lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma;
|
1033 |
|
|
lu->query_logins_orb->query_response_hi =
|
1034 |
|
|
ORB_SET_NODE_ID(hi->host->node_id);
|
1035 |
|
|
lu->query_logins_orb->lun_misc =
|
1036 |
|
|
ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
|
1037 |
|
|
lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
|
1038 |
|
|
lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun);
|
1039 |
|
|
|
1040 |
|
|
lu->query_logins_orb->reserved_resp_length =
|
1041 |
|
|
ORB_SET_QUERY_LOGINS_RESP_LENGTH(
|
1042 |
|
|
sizeof(struct sbp2_query_logins_response));
|
1043 |
|
|
|
1044 |
|
|
lu->query_logins_orb->status_fifo_hi =
|
1045 |
|
|
ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
|
1046 |
|
|
lu->query_logins_orb->status_fifo_lo =
|
1047 |
|
|
ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
|
1048 |
|
|
|
1049 |
|
|
sbp2util_cpu_to_be32_buffer(lu->query_logins_orb,
|
1050 |
|
|
sizeof(struct sbp2_query_logins_orb));
|
1051 |
|
|
|
1052 |
|
|
memset(lu->query_logins_response, 0,
|
1053 |
|
|
sizeof(struct sbp2_query_logins_response));
|
1054 |
|
|
|
1055 |
|
|
data[0] = ORB_SET_NODE_ID(hi->host->node_id);
|
1056 |
|
|
data[1] = lu->query_logins_orb_dma;
|
1057 |
|
|
sbp2util_cpu_to_be32_buffer(data, 8);
|
1058 |
|
|
|
1059 |
|
|
hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
|
1060 |
|
|
|
1061 |
|
|
if (sbp2util_access_timeout(lu, 2*HZ)) {
|
1062 |
|
|
SBP2_INFO("Error querying logins to SBP-2 device - timed out");
|
1063 |
|
|
return -EIO;
|
1064 |
|
|
}
|
1065 |
|
|
|
1066 |
|
|
if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) {
|
1067 |
|
|
SBP2_INFO("Error querying logins to SBP-2 device - timed out");
|
1068 |
|
|
return -EIO;
|
1069 |
|
|
}
|
1070 |
|
|
|
1071 |
|
|
if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
|
1072 |
|
|
SBP2_INFO("Error querying logins to SBP-2 device - failed");
|
1073 |
|
|
return -EIO;
|
1074 |
|
|
}
|
1075 |
|
|
|
1076 |
|
|
sbp2util_cpu_to_be32_buffer(lu->query_logins_response,
|
1077 |
|
|
sizeof(struct sbp2_query_logins_response));
|
1078 |
|
|
|
1079 |
|
|
max_logins = RESPONSE_GET_MAX_LOGINS(
|
1080 |
|
|
lu->query_logins_response->length_max_logins);
|
1081 |
|
|
SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
|
1082 |
|
|
|
1083 |
|
|
active_logins = RESPONSE_GET_ACTIVE_LOGINS(
|
1084 |
|
|
lu->query_logins_response->length_max_logins);
|
1085 |
|
|
SBP2_INFO("Number of active logins: %d", active_logins);
|
1086 |
|
|
|
1087 |
|
|
if (active_logins >= max_logins) {
|
1088 |
|
|
return -EIO;
|
1089 |
|
|
}
|
1090 |
|
|
|
1091 |
|
|
return 0;
|
1092 |
|
|
}
|
1093 |
|
|
|
1094 |
|
|
static int sbp2_login_device(struct sbp2_lu *lu)
|
1095 |
|
|
{
|
1096 |
|
|
struct sbp2_fwhost_info *hi = lu->hi;
|
1097 |
|
|
quadlet_t data[2];
|
1098 |
|
|
|
1099 |
|
|
if (!lu->login_orb)
|
1100 |
|
|
return -EIO;
|
1101 |
|
|
|
1102 |
|
|
if (!sbp2_exclusive_login && sbp2_query_logins(lu)) {
|
1103 |
|
|
SBP2_INFO("Device does not support any more concurrent logins");
|
1104 |
|
|
return -EIO;
|
1105 |
|
|
}
|
1106 |
|
|
|
1107 |
|
|
/* assume no password */
|
1108 |
|
|
lu->login_orb->password_hi = 0;
|
1109 |
|
|
lu->login_orb->password_lo = 0;
|
1110 |
|
|
|
1111 |
|
|
lu->login_orb->login_response_lo = lu->login_response_dma;
|
1112 |
|
|
lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
|
1113 |
|
|
lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
|
1114 |
|
|
|
1115 |
|
|
/* one second reconnect time */
|
1116 |
|
|
lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0);
|
1117 |
|
|
lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login);
|
1118 |
|
|
lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1);
|
1119 |
|
|
lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun);
|
1120 |
|
|
|
1121 |
|
|
lu->login_orb->passwd_resp_lengths =
|
1122 |
|
|
ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
|
1123 |
|
|
|
1124 |
|
|
lu->login_orb->status_fifo_hi =
|
1125 |
|
|
ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
|
1126 |
|
|
lu->login_orb->status_fifo_lo =
|
1127 |
|
|
ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
|
1128 |
|
|
|
1129 |
|
|
sbp2util_cpu_to_be32_buffer(lu->login_orb,
|
1130 |
|
|
sizeof(struct sbp2_login_orb));
|
1131 |
|
|
|
1132 |
|
|
memset(lu->login_response, 0, sizeof(struct sbp2_login_response));
|
1133 |
|
|
|
1134 |
|
|
data[0] = ORB_SET_NODE_ID(hi->host->node_id);
|
1135 |
|
|
data[1] = lu->login_orb_dma;
|
1136 |
|
|
sbp2util_cpu_to_be32_buffer(data, 8);
|
1137 |
|
|
|
1138 |
|
|
hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
|
1139 |
|
|
|
1140 |
|
|
/* wait up to 20 seconds for login status */
|
1141 |
|
|
if (sbp2util_access_timeout(lu, 20*HZ)) {
|
1142 |
|
|
SBP2_ERR("Error logging into SBP-2 device - timed out");
|
1143 |
|
|
return -EIO;
|
1144 |
|
|
}
|
1145 |
|
|
|
1146 |
|
|
/* make sure that the returned status matches the login ORB */
|
1147 |
|
|
if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) {
|
1148 |
|
|
SBP2_ERR("Error logging into SBP-2 device - timed out");
|
1149 |
|
|
return -EIO;
|
1150 |
|
|
}
|
1151 |
|
|
|
1152 |
|
|
if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
|
1153 |
|
|
SBP2_ERR("Error logging into SBP-2 device - failed");
|
1154 |
|
|
return -EIO;
|
1155 |
|
|
}
|
1156 |
|
|
|
1157 |
|
|
sbp2util_cpu_to_be32_buffer(lu->login_response,
|
1158 |
|
|
sizeof(struct sbp2_login_response));
|
1159 |
|
|
lu->command_block_agent_addr =
|
1160 |
|
|
((u64)lu->login_response->command_block_agent_hi) << 32;
|
1161 |
|
|
lu->command_block_agent_addr |=
|
1162 |
|
|
((u64)lu->login_response->command_block_agent_lo);
|
1163 |
|
|
lu->command_block_agent_addr &= 0x0000ffffffffffffULL;
|
1164 |
|
|
|
1165 |
|
|
SBP2_INFO("Logged into SBP-2 device");
|
1166 |
|
|
return 0;
|
1167 |
|
|
}
|
1168 |
|
|
|
1169 |
|
|
static int sbp2_logout_device(struct sbp2_lu *lu)
|
1170 |
|
|
{
|
1171 |
|
|
struct sbp2_fwhost_info *hi = lu->hi;
|
1172 |
|
|
quadlet_t data[2];
|
1173 |
|
|
int error;
|
1174 |
|
|
|
1175 |
|
|
lu->logout_orb->reserved1 = 0x0;
|
1176 |
|
|
lu->logout_orb->reserved2 = 0x0;
|
1177 |
|
|
lu->logout_orb->reserved3 = 0x0;
|
1178 |
|
|
lu->logout_orb->reserved4 = 0x0;
|
1179 |
|
|
|
1180 |
|
|
lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
|
1181 |
|
|
lu->logout_orb->login_ID_misc |=
|
1182 |
|
|
ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
|
1183 |
|
|
lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
|
1184 |
|
|
|
1185 |
|
|
lu->logout_orb->reserved5 = 0x0;
|
1186 |
|
|
lu->logout_orb->status_fifo_hi =
|
1187 |
|
|
ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
|
1188 |
|
|
lu->logout_orb->status_fifo_lo =
|
1189 |
|
|
ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
|
1190 |
|
|
|
1191 |
|
|
sbp2util_cpu_to_be32_buffer(lu->logout_orb,
|
1192 |
|
|
sizeof(struct sbp2_logout_orb));
|
1193 |
|
|
|
1194 |
|
|
data[0] = ORB_SET_NODE_ID(hi->host->node_id);
|
1195 |
|
|
data[1] = lu->logout_orb_dma;
|
1196 |
|
|
sbp2util_cpu_to_be32_buffer(data, 8);
|
1197 |
|
|
|
1198 |
|
|
error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
|
1199 |
|
|
if (error)
|
1200 |
|
|
return error;
|
1201 |
|
|
|
1202 |
|
|
/* wait up to 1 second for the device to complete logout */
|
1203 |
|
|
if (sbp2util_access_timeout(lu, HZ))
|
1204 |
|
|
return -EIO;
|
1205 |
|
|
|
1206 |
|
|
SBP2_INFO("Logged out of SBP-2 device");
|
1207 |
|
|
return 0;
|
1208 |
|
|
}
|
1209 |
|
|
|
1210 |
|
|
static int sbp2_reconnect_device(struct sbp2_lu *lu)
|
1211 |
|
|
{
|
1212 |
|
|
struct sbp2_fwhost_info *hi = lu->hi;
|
1213 |
|
|
quadlet_t data[2];
|
1214 |
|
|
int error;
|
1215 |
|
|
|
1216 |
|
|
lu->reconnect_orb->reserved1 = 0x0;
|
1217 |
|
|
lu->reconnect_orb->reserved2 = 0x0;
|
1218 |
|
|
lu->reconnect_orb->reserved3 = 0x0;
|
1219 |
|
|
lu->reconnect_orb->reserved4 = 0x0;
|
1220 |
|
|
|
1221 |
|
|
lu->reconnect_orb->login_ID_misc =
|
1222 |
|
|
ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
|
1223 |
|
|
lu->reconnect_orb->login_ID_misc |=
|
1224 |
|
|
ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
|
1225 |
|
|
lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
|
1226 |
|
|
|
1227 |
|
|
lu->reconnect_orb->reserved5 = 0x0;
|
1228 |
|
|
lu->reconnect_orb->status_fifo_hi =
|
1229 |
|
|
ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
|
1230 |
|
|
lu->reconnect_orb->status_fifo_lo =
|
1231 |
|
|
ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
|
1232 |
|
|
|
1233 |
|
|
sbp2util_cpu_to_be32_buffer(lu->reconnect_orb,
|
1234 |
|
|
sizeof(struct sbp2_reconnect_orb));
|
1235 |
|
|
|
1236 |
|
|
data[0] = ORB_SET_NODE_ID(hi->host->node_id);
|
1237 |
|
|
data[1] = lu->reconnect_orb_dma;
|
1238 |
|
|
sbp2util_cpu_to_be32_buffer(data, 8);
|
1239 |
|
|
|
1240 |
|
|
error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
|
1241 |
|
|
if (error)
|
1242 |
|
|
return error;
|
1243 |
|
|
|
1244 |
|
|
/* wait up to 1 second for reconnect status */
|
1245 |
|
|
if (sbp2util_access_timeout(lu, HZ)) {
|
1246 |
|
|
SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
|
1247 |
|
|
return -EIO;
|
1248 |
|
|
}
|
1249 |
|
|
|
1250 |
|
|
/* make sure that the returned status matches the reconnect ORB */
|
1251 |
|
|
if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) {
|
1252 |
|
|
SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
|
1253 |
|
|
return -EIO;
|
1254 |
|
|
}
|
1255 |
|
|
|
1256 |
|
|
if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
|
1257 |
|
|
SBP2_ERR("Error reconnecting to SBP-2 device - failed");
|
1258 |
|
|
return -EIO;
|
1259 |
|
|
}
|
1260 |
|
|
|
1261 |
|
|
SBP2_INFO("Reconnected to SBP-2 device");
|
1262 |
|
|
return 0;
|
1263 |
|
|
}
|
1264 |
|
|
|
1265 |
|
|
/*
|
1266 |
|
|
* Set the target node's Single Phase Retry limit. Affects the target's retry
|
1267 |
|
|
* behaviour if our node is too busy to accept requests.
|
1268 |
|
|
*/
|
1269 |
|
|
static int sbp2_set_busy_timeout(struct sbp2_lu *lu)
|
1270 |
|
|
{
|
1271 |
|
|
quadlet_t data;
|
1272 |
|
|
|
1273 |
|
|
data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
|
1274 |
|
|
if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
|
1275 |
|
|
SBP2_ERR("%s error", __FUNCTION__);
|
1276 |
|
|
return 0;
|
1277 |
|
|
}
|
1278 |
|
|
|
1279 |
|
|
static void sbp2_parse_unit_directory(struct sbp2_lu *lu,
|
1280 |
|
|
struct unit_directory *ud)
|
1281 |
|
|
{
|
1282 |
|
|
struct csr1212_keyval *kv;
|
1283 |
|
|
struct csr1212_dentry *dentry;
|
1284 |
|
|
u64 management_agent_addr;
|
1285 |
|
|
u32 unit_characteristics, firmware_revision;
|
1286 |
|
|
unsigned workarounds;
|
1287 |
|
|
int i;
|
1288 |
|
|
|
1289 |
|
|
management_agent_addr = 0;
|
1290 |
|
|
unit_characteristics = 0;
|
1291 |
|
|
firmware_revision = 0;
|
1292 |
|
|
|
1293 |
|
|
csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
|
1294 |
|
|
switch (kv->key.id) {
|
1295 |
|
|
case CSR1212_KV_ID_DEPENDENT_INFO:
|
1296 |
|
|
if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET)
|
1297 |
|
|
management_agent_addr =
|
1298 |
|
|
CSR1212_REGISTER_SPACE_BASE +
|
1299 |
|
|
(kv->value.csr_offset << 2);
|
1300 |
|
|
|
1301 |
|
|
else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE)
|
1302 |
|
|
lu->lun = ORB_SET_LUN(kv->value.immediate);
|
1303 |
|
|
break;
|
1304 |
|
|
|
1305 |
|
|
case SBP2_UNIT_CHARACTERISTICS_KEY:
|
1306 |
|
|
/* FIXME: This is ignored so far.
|
1307 |
|
|
* See SBP-2 clause 7.4.8. */
|
1308 |
|
|
unit_characteristics = kv->value.immediate;
|
1309 |
|
|
break;
|
1310 |
|
|
|
1311 |
|
|
case SBP2_FIRMWARE_REVISION_KEY:
|
1312 |
|
|
firmware_revision = kv->value.immediate;
|
1313 |
|
|
break;
|
1314 |
|
|
|
1315 |
|
|
default:
|
1316 |
|
|
/* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY.
|
1317 |
|
|
* Its "ordered" bit has consequences for command ORB
|
1318 |
|
|
* list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */
|
1319 |
|
|
break;
|
1320 |
|
|
}
|
1321 |
|
|
}
|
1322 |
|
|
|
1323 |
|
|
workarounds = sbp2_default_workarounds;
|
1324 |
|
|
|
1325 |
|
|
if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
|
1326 |
|
|
for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
|
1327 |
|
|
if (sbp2_workarounds_table[i].firmware_revision !=
|
1328 |
|
|
SBP2_ROM_VALUE_WILDCARD &&
|
1329 |
|
|
sbp2_workarounds_table[i].firmware_revision !=
|
1330 |
|
|
(firmware_revision & 0xffff00))
|
1331 |
|
|
continue;
|
1332 |
|
|
if (sbp2_workarounds_table[i].model_id !=
|
1333 |
|
|
SBP2_ROM_VALUE_WILDCARD &&
|
1334 |
|
|
sbp2_workarounds_table[i].model_id != ud->model_id)
|
1335 |
|
|
continue;
|
1336 |
|
|
workarounds |= sbp2_workarounds_table[i].workarounds;
|
1337 |
|
|
break;
|
1338 |
|
|
}
|
1339 |
|
|
|
1340 |
|
|
if (workarounds)
|
1341 |
|
|
SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
|
1342 |
|
|
"(firmware_revision 0x%06x, vendor_id 0x%06x,"
|
1343 |
|
|
" model_id 0x%06x)",
|
1344 |
|
|
NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
|
1345 |
|
|
workarounds, firmware_revision,
|
1346 |
|
|
ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id,
|
1347 |
|
|
ud->model_id);
|
1348 |
|
|
|
1349 |
|
|
/* We would need one SCSI host template for each target to adjust
|
1350 |
|
|
* max_sectors on the fly, therefore warn only. */
|
1351 |
|
|
if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
|
1352 |
|
|
(sbp2_max_sectors * 512) > (128 * 1024))
|
1353 |
|
|
SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB "
|
1354 |
|
|
"max transfer size. WARNING: Current max_sectors "
|
1355 |
|
|
"setting is larger than 128KB (%d sectors)",
|
1356 |
|
|
NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
|
1357 |
|
|
sbp2_max_sectors);
|
1358 |
|
|
|
1359 |
|
|
/* If this is a logical unit directory entry, process the parent
|
1360 |
|
|
* to get the values. */
|
1361 |
|
|
if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
|
1362 |
|
|
struct unit_directory *parent_ud = container_of(
|
1363 |
|
|
ud->device.parent, struct unit_directory, device);
|
1364 |
|
|
sbp2_parse_unit_directory(lu, parent_ud);
|
1365 |
|
|
} else {
|
1366 |
|
|
lu->management_agent_addr = management_agent_addr;
|
1367 |
|
|
lu->workarounds = workarounds;
|
1368 |
|
|
if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
|
1369 |
|
|
lu->lun = ORB_SET_LUN(ud->lun);
|
1370 |
|
|
}
|
1371 |
|
|
}
|
1372 |
|
|
|
1373 |
|
|
#define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
|
1374 |
|
|
|
1375 |
|
|
/*
|
1376 |
|
|
* This function is called in order to determine the max speed and packet
|
1377 |
|
|
* size we can use in our ORBs. Note, that we (the driver and host) only
|
1378 |
|
|
* initiate the transaction. The SBP-2 device actually transfers the data
|
1379 |
|
|
* (by reading from the DMA area we tell it). This means that the SBP-2
|
1380 |
|
|
* device decides the actual maximum data it can transfer. We just tell it
|
1381 |
|
|
* the speed that it needs to use, and the max_rec the host supports, and
|
1382 |
|
|
* it takes care of the rest.
|
1383 |
|
|
*/
|
1384 |
|
|
static int sbp2_max_speed_and_size(struct sbp2_lu *lu)
|
1385 |
|
|
{
|
1386 |
|
|
struct sbp2_fwhost_info *hi = lu->hi;
|
1387 |
|
|
u8 payload;
|
1388 |
|
|
|
1389 |
|
|
lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)];
|
1390 |
|
|
|
1391 |
|
|
if (lu->speed_code > sbp2_max_speed) {
|
1392 |
|
|
lu->speed_code = sbp2_max_speed;
|
1393 |
|
|
SBP2_INFO("Reducing speed to %s",
|
1394 |
|
|
hpsb_speedto_str[sbp2_max_speed]);
|
1395 |
|
|
}
|
1396 |
|
|
|
1397 |
|
|
/* Payload size is the lesser of what our speed supports and what
|
1398 |
|
|
* our host supports. */
|
1399 |
|
|
payload = min(sbp2_speedto_max_payload[lu->speed_code],
|
1400 |
|
|
(u8) (hi->host->csr.max_rec - 1));
|
1401 |
|
|
|
1402 |
|
|
/* If physical DMA is off, work around limitation in ohci1394:
|
1403 |
|
|
* packet size must not exceed PAGE_SIZE */
|
1404 |
|
|
if (lu->ne->host->low_addr_space < (1ULL << 32))
|
1405 |
|
|
while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE &&
|
1406 |
|
|
payload)
|
1407 |
|
|
payload--;
|
1408 |
|
|
|
1409 |
|
|
SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
|
1410 |
|
|
NODE_BUS_ARGS(hi->host, lu->ne->nodeid),
|
1411 |
|
|
hpsb_speedto_str[lu->speed_code],
|
1412 |
|
|
SBP2_PAYLOAD_TO_BYTES(payload));
|
1413 |
|
|
|
1414 |
|
|
lu->max_payload_size = payload;
|
1415 |
|
|
return 0;
|
1416 |
|
|
}
|
1417 |
|
|
|
1418 |
|
|
static int sbp2_agent_reset(struct sbp2_lu *lu, int wait)
|
1419 |
|
|
{
|
1420 |
|
|
quadlet_t data;
|
1421 |
|
|
u64 addr;
|
1422 |
|
|
int retval;
|
1423 |
|
|
unsigned long flags;
|
1424 |
|
|
|
1425 |
|
|
/* flush lu->protocol_work */
|
1426 |
|
|
if (wait)
|
1427 |
|
|
flush_scheduled_work();
|
1428 |
|
|
|
1429 |
|
|
data = ntohl(SBP2_AGENT_RESET_DATA);
|
1430 |
|
|
addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
|
1431 |
|
|
|
1432 |
|
|
if (wait)
|
1433 |
|
|
retval = hpsb_node_write(lu->ne, addr, &data, 4);
|
1434 |
|
|
else
|
1435 |
|
|
retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4);
|
1436 |
|
|
|
1437 |
|
|
if (retval < 0) {
|
1438 |
|
|
SBP2_ERR("hpsb_node_write failed.\n");
|
1439 |
|
|
return -EIO;
|
1440 |
|
|
}
|
1441 |
|
|
|
1442 |
|
|
/* make sure that the ORB_POINTER is written on next command */
|
1443 |
|
|
spin_lock_irqsave(&lu->cmd_orb_lock, flags);
|
1444 |
|
|
lu->last_orb = NULL;
|
1445 |
|
|
spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
|
1446 |
|
|
|
1447 |
|
|
return 0;
|
1448 |
|
|
}
|
1449 |
|
|
|
1450 |
|
|
static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
|
1451 |
|
|
struct sbp2_fwhost_info *hi,
|
1452 |
|
|
struct sbp2_command_info *cmd,
|
1453 |
|
|
unsigned int scsi_use_sg,
|
1454 |
|
|
struct scatterlist *sgpnt,
|
1455 |
|
|
u32 orb_direction,
|
1456 |
|
|
enum dma_data_direction dma_dir)
|
1457 |
|
|
{
|
1458 |
|
|
cmd->dma_dir = dma_dir;
|
1459 |
|
|
orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
|
1460 |
|
|
orb->misc |= ORB_SET_DIRECTION(orb_direction);
|
1461 |
|
|
|
1462 |
|
|
/* special case if only one element (and less than 64KB in size) */
|
1463 |
|
|
if ((scsi_use_sg == 1) &&
|
1464 |
|
|
(sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
|
1465 |
|
|
|
1466 |
|
|
cmd->dma_size = sgpnt[0].length;
|
1467 |
|
|
cmd->dma_type = CMD_DMA_PAGE;
|
1468 |
|
|
cmd->cmd_dma = dma_map_page(hi->host->device.parent,
|
1469 |
|
|
sg_page(&sgpnt[0]), sgpnt[0].offset,
|
1470 |
|
|
cmd->dma_size, cmd->dma_dir);
|
1471 |
|
|
|
1472 |
|
|
orb->data_descriptor_lo = cmd->cmd_dma;
|
1473 |
|
|
orb->misc |= ORB_SET_DATA_SIZE(cmd->dma_size);
|
1474 |
|
|
|
1475 |
|
|
} else {
|
1476 |
|
|
struct sbp2_unrestricted_page_table *sg_element =
|
1477 |
|
|
&cmd->scatter_gather_element[0];
|
1478 |
|
|
u32 sg_count, sg_len;
|
1479 |
|
|
dma_addr_t sg_addr;
|
1480 |
|
|
int i, count = dma_map_sg(hi->host->device.parent, sgpnt,
|
1481 |
|
|
scsi_use_sg, dma_dir);
|
1482 |
|
|
|
1483 |
|
|
cmd->dma_size = scsi_use_sg;
|
1484 |
|
|
cmd->sge_buffer = sgpnt;
|
1485 |
|
|
|
1486 |
|
|
/* use page tables (s/g) */
|
1487 |
|
|
orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
|
1488 |
|
|
orb->data_descriptor_lo = cmd->sge_dma;
|
1489 |
|
|
|
1490 |
|
|
/* loop through and fill out our SBP-2 page tables
|
1491 |
|
|
* (and split up anything too large) */
|
1492 |
|
|
for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
|
1493 |
|
|
sg_len = sg_dma_len(sgpnt);
|
1494 |
|
|
sg_addr = sg_dma_address(sgpnt);
|
1495 |
|
|
while (sg_len) {
|
1496 |
|
|
sg_element[sg_count].segment_base_lo = sg_addr;
|
1497 |
|
|
if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
|
1498 |
|
|
sg_element[sg_count].length_segment_base_hi =
|
1499 |
|
|
PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
|
1500 |
|
|
sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
|
1501 |
|
|
sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
|
1502 |
|
|
} else {
|
1503 |
|
|
sg_element[sg_count].length_segment_base_hi =
|
1504 |
|
|
PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
|
1505 |
|
|
sg_len = 0;
|
1506 |
|
|
}
|
1507 |
|
|
sg_count++;
|
1508 |
|
|
}
|
1509 |
|
|
}
|
1510 |
|
|
|
1511 |
|
|
orb->misc |= ORB_SET_DATA_SIZE(sg_count);
|
1512 |
|
|
|
1513 |
|
|
sbp2util_cpu_to_be32_buffer(sg_element,
|
1514 |
|
|
(sizeof(struct sbp2_unrestricted_page_table)) *
|
1515 |
|
|
sg_count);
|
1516 |
|
|
}
|
1517 |
|
|
}
|
1518 |
|
|
|
1519 |
|
|
static void sbp2_create_command_orb(struct sbp2_lu *lu,
|
1520 |
|
|
struct sbp2_command_info *cmd,
|
1521 |
|
|
unchar *scsi_cmd,
|
1522 |
|
|
unsigned int scsi_use_sg,
|
1523 |
|
|
unsigned int scsi_request_bufflen,
|
1524 |
|
|
void *scsi_request_buffer,
|
1525 |
|
|
enum dma_data_direction dma_dir)
|
1526 |
|
|
{
|
1527 |
|
|
struct sbp2_fwhost_info *hi = lu->hi;
|
1528 |
|
|
struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer;
|
1529 |
|
|
struct sbp2_command_orb *orb = &cmd->command_orb;
|
1530 |
|
|
u32 orb_direction;
|
1531 |
|
|
|
1532 |
|
|
/*
|
1533 |
|
|
* Set-up our command ORB.
|
1534 |
|
|
*
|
1535 |
|
|
* NOTE: We're doing unrestricted page tables (s/g), as this is
|
1536 |
|
|
* best performance (at least with the devices I have). This means
|
1537 |
|
|
* that data_size becomes the number of s/g elements, and
|
1538 |
|
|
* page_size should be zero (for unrestricted).
|
1539 |
|
|
*/
|
1540 |
|
|
orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
|
1541 |
|
|
orb->next_ORB_lo = 0x0;
|
1542 |
|
|
orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size);
|
1543 |
|
|
orb->misc |= ORB_SET_SPEED(lu->speed_code);
|
1544 |
|
|
orb->misc |= ORB_SET_NOTIFY(1);
|
1545 |
|
|
|
1546 |
|
|
if (dma_dir == DMA_NONE)
|
1547 |
|
|
orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
|
1548 |
|
|
else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
|
1549 |
|
|
orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
|
1550 |
|
|
else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
|
1551 |
|
|
orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
|
1552 |
|
|
else {
|
1553 |
|
|
SBP2_INFO("Falling back to DMA_NONE");
|
1554 |
|
|
orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
|
1555 |
|
|
}
|
1556 |
|
|
|
1557 |
|
|
/* set up our page table stuff */
|
1558 |
|
|
if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
|
1559 |
|
|
orb->data_descriptor_hi = 0x0;
|
1560 |
|
|
orb->data_descriptor_lo = 0x0;
|
1561 |
|
|
orb->misc |= ORB_SET_DIRECTION(1);
|
1562 |
|
|
} else
|
1563 |
|
|
sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sgpnt,
|
1564 |
|
|
orb_direction, dma_dir);
|
1565 |
|
|
|
1566 |
|
|
sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb));
|
1567 |
|
|
|
1568 |
|
|
memset(orb->cdb, 0, 12);
|
1569 |
|
|
memcpy(orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
|
1570 |
|
|
}
|
1571 |
|
|
|
1572 |
|
|
static void sbp2_link_orb_command(struct sbp2_lu *lu,
|
1573 |
|
|
struct sbp2_command_info *cmd)
|
1574 |
|
|
{
|
1575 |
|
|
struct sbp2_fwhost_info *hi = lu->hi;
|
1576 |
|
|
struct sbp2_command_orb *last_orb;
|
1577 |
|
|
dma_addr_t last_orb_dma;
|
1578 |
|
|
u64 addr = lu->command_block_agent_addr;
|
1579 |
|
|
quadlet_t data[2];
|
1580 |
|
|
size_t length;
|
1581 |
|
|
unsigned long flags;
|
1582 |
|
|
|
1583 |
|
|
dma_sync_single_for_device(hi->host->device.parent,
|
1584 |
|
|
cmd->command_orb_dma,
|
1585 |
|
|
sizeof(struct sbp2_command_orb),
|
1586 |
|
|
DMA_TO_DEVICE);
|
1587 |
|
|
dma_sync_single_for_device(hi->host->device.parent, cmd->sge_dma,
|
1588 |
|
|
sizeof(cmd->scatter_gather_element),
|
1589 |
|
|
DMA_TO_DEVICE);
|
1590 |
|
|
|
1591 |
|
|
/* check to see if there are any previous orbs to use */
|
1592 |
|
|
spin_lock_irqsave(&lu->cmd_orb_lock, flags);
|
1593 |
|
|
last_orb = lu->last_orb;
|
1594 |
|
|
last_orb_dma = lu->last_orb_dma;
|
1595 |
|
|
if (!last_orb) {
|
1596 |
|
|
/*
|
1597 |
|
|
* last_orb == NULL means: We know that the target's fetch agent
|
1598 |
|
|
* is not active right now.
|
1599 |
|
|
*/
|
1600 |
|
|
addr += SBP2_ORB_POINTER_OFFSET;
|
1601 |
|
|
data[0] = ORB_SET_NODE_ID(hi->host->node_id);
|
1602 |
|
|
data[1] = cmd->command_orb_dma;
|
1603 |
|
|
sbp2util_cpu_to_be32_buffer(data, 8);
|
1604 |
|
|
length = 8;
|
1605 |
|
|
} else {
|
1606 |
|
|
/*
|
1607 |
|
|
* last_orb != NULL means: We know that the target's fetch agent
|
1608 |
|
|
* is (very probably) not dead or in reset state right now.
|
1609 |
|
|
* We have an ORB already sent that we can append a new one to.
|
1610 |
|
|
* The target's fetch agent may or may not have read this
|
1611 |
|
|
* previous ORB yet.
|
1612 |
|
|
*/
|
1613 |
|
|
dma_sync_single_for_cpu(hi->host->device.parent, last_orb_dma,
|
1614 |
|
|
sizeof(struct sbp2_command_orb),
|
1615 |
|
|
DMA_TO_DEVICE);
|
1616 |
|
|
last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma);
|
1617 |
|
|
wmb();
|
1618 |
|
|
/* Tells hardware that this pointer is valid */
|
1619 |
|
|
last_orb->next_ORB_hi = 0;
|
1620 |
|
|
dma_sync_single_for_device(hi->host->device.parent,
|
1621 |
|
|
last_orb_dma,
|
1622 |
|
|
sizeof(struct sbp2_command_orb),
|
1623 |
|
|
DMA_TO_DEVICE);
|
1624 |
|
|
addr += SBP2_DOORBELL_OFFSET;
|
1625 |
|
|
data[0] = 0;
|
1626 |
|
|
length = 4;
|
1627 |
|
|
}
|
1628 |
|
|
lu->last_orb = &cmd->command_orb;
|
1629 |
|
|
lu->last_orb_dma = cmd->command_orb_dma;
|
1630 |
|
|
spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
|
1631 |
|
|
|
1632 |
|
|
if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) {
|
1633 |
|
|
/*
|
1634 |
|
|
* sbp2util_node_write_no_wait failed. We certainly ran out
|
1635 |
|
|
* of transaction labels, perhaps just because there were no
|
1636 |
|
|
* context switches which gave khpsbpkt a chance to collect
|
1637 |
|
|
* free tlabels. Try again in non-atomic context. If necessary,
|
1638 |
|
|
* the workqueue job will sleep to guaranteedly get a tlabel.
|
1639 |
|
|
* We do not accept new commands until the job is over.
|
1640 |
|
|
*/
|
1641 |
|
|
scsi_block_requests(lu->shost);
|
1642 |
|
|
PREPARE_WORK(&lu->protocol_work,
|
1643 |
|
|
last_orb ? sbp2util_write_doorbell:
|
1644 |
|
|
sbp2util_write_orb_pointer);
|
1645 |
|
|
schedule_work(&lu->protocol_work);
|
1646 |
|
|
}
|
1647 |
|
|
}
|
1648 |
|
|
|
1649 |
|
|
static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt,
|
1650 |
|
|
void (*done)(struct scsi_cmnd *))
|
1651 |
|
|
{
|
1652 |
|
|
unchar *scsi_cmd = (unchar *)SCpnt->cmnd;
|
1653 |
|
|
unsigned int request_bufflen = scsi_bufflen(SCpnt);
|
1654 |
|
|
struct sbp2_command_info *cmd;
|
1655 |
|
|
|
1656 |
|
|
cmd = sbp2util_allocate_command_orb(lu, SCpnt, done);
|
1657 |
|
|
if (!cmd)
|
1658 |
|
|
return -EIO;
|
1659 |
|
|
|
1660 |
|
|
sbp2_create_command_orb(lu, cmd, scsi_cmd, scsi_sg_count(SCpnt),
|
1661 |
|
|
request_bufflen, scsi_sglist(SCpnt),
|
1662 |
|
|
SCpnt->sc_data_direction);
|
1663 |
|
|
sbp2_link_orb_command(lu, cmd);
|
1664 |
|
|
|
1665 |
|
|
return 0;
|
1666 |
|
|
}
|
1667 |
|
|
|
1668 |
|
|
/*
|
1669 |
|
|
* Translates SBP-2 status into SCSI sense data for check conditions
|
1670 |
|
|
*/
|
1671 |
|
|
static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status,
|
1672 |
|
|
unchar *sense_data)
|
1673 |
|
|
{
|
1674 |
|
|
/* OK, it's pretty ugly... ;-) */
|
1675 |
|
|
sense_data[0] = 0x70;
|
1676 |
|
|
sense_data[1] = 0x0;
|
1677 |
|
|
sense_data[2] = sbp2_status[9];
|
1678 |
|
|
sense_data[3] = sbp2_status[12];
|
1679 |
|
|
sense_data[4] = sbp2_status[13];
|
1680 |
|
|
sense_data[5] = sbp2_status[14];
|
1681 |
|
|
sense_data[6] = sbp2_status[15];
|
1682 |
|
|
sense_data[7] = 10;
|
1683 |
|
|
sense_data[8] = sbp2_status[16];
|
1684 |
|
|
sense_data[9] = sbp2_status[17];
|
1685 |
|
|
sense_data[10] = sbp2_status[18];
|
1686 |
|
|
sense_data[11] = sbp2_status[19];
|
1687 |
|
|
sense_data[12] = sbp2_status[10];
|
1688 |
|
|
sense_data[13] = sbp2_status[11];
|
1689 |
|
|
sense_data[14] = sbp2_status[20];
|
1690 |
|
|
sense_data[15] = sbp2_status[21];
|
1691 |
|
|
|
1692 |
|
|
return sbp2_status[8] & 0x3f;
|
1693 |
|
|
}
|
1694 |
|
|
|
1695 |
|
|
static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid,
|
1696 |
|
|
int destid, quadlet_t *data, u64 addr,
|
1697 |
|
|
size_t length, u16 fl)
|
1698 |
|
|
{
|
1699 |
|
|
struct sbp2_fwhost_info *hi;
|
1700 |
|
|
struct sbp2_lu *lu = NULL, *lu_tmp;
|
1701 |
|
|
struct scsi_cmnd *SCpnt = NULL;
|
1702 |
|
|
struct sbp2_status_block *sb;
|
1703 |
|
|
u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
|
1704 |
|
|
struct sbp2_command_info *cmd;
|
1705 |
|
|
unsigned long flags;
|
1706 |
|
|
|
1707 |
|
|
if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) {
|
1708 |
|
|
SBP2_ERR("Wrong size of status block");
|
1709 |
|
|
return RCODE_ADDRESS_ERROR;
|
1710 |
|
|
}
|
1711 |
|
|
if (unlikely(!host)) {
|
1712 |
|
|
SBP2_ERR("host is NULL - this is bad!");
|
1713 |
|
|
return RCODE_ADDRESS_ERROR;
|
1714 |
|
|
}
|
1715 |
|
|
hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
|
1716 |
|
|
if (unlikely(!hi)) {
|
1717 |
|
|
SBP2_ERR("host info is NULL - this is bad!");
|
1718 |
|
|
return RCODE_ADDRESS_ERROR;
|
1719 |
|
|
}
|
1720 |
|
|
|
1721 |
|
|
/* Find the unit which wrote the status. */
|
1722 |
|
|
read_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
|
1723 |
|
|
list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) {
|
1724 |
|
|
if (lu_tmp->ne->nodeid == nodeid &&
|
1725 |
|
|
lu_tmp->status_fifo_addr == addr) {
|
1726 |
|
|
lu = lu_tmp;
|
1727 |
|
|
break;
|
1728 |
|
|
}
|
1729 |
|
|
}
|
1730 |
|
|
read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
|
1731 |
|
|
|
1732 |
|
|
if (unlikely(!lu)) {
|
1733 |
|
|
SBP2_ERR("lu is NULL - device is gone?");
|
1734 |
|
|
return RCODE_ADDRESS_ERROR;
|
1735 |
|
|
}
|
1736 |
|
|
|
1737 |
|
|
/* Put response into lu status fifo buffer. The first two bytes
|
1738 |
|
|
* come in big endian bit order. Often the target writes only a
|
1739 |
|
|
* truncated status block, minimally the first two quadlets. The rest
|
1740 |
|
|
* is implied to be zeros. */
|
1741 |
|
|
sb = &lu->status_block;
|
1742 |
|
|
memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent));
|
1743 |
|
|
memcpy(sb, data, length);
|
1744 |
|
|
sbp2util_be32_to_cpu_buffer(sb, 8);
|
1745 |
|
|
|
1746 |
|
|
/* Ignore unsolicited status. Handle command ORB status. */
|
1747 |
|
|
if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2))
|
1748 |
|
|
cmd = NULL;
|
1749 |
|
|
else
|
1750 |
|
|
cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo);
|
1751 |
|
|
if (cmd) {
|
1752 |
|
|
dma_sync_single_for_cpu(hi->host->device.parent,
|
1753 |
|
|
cmd->command_orb_dma,
|
1754 |
|
|
sizeof(struct sbp2_command_orb),
|
1755 |
|
|
DMA_TO_DEVICE);
|
1756 |
|
|
dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
|
1757 |
|
|
sizeof(cmd->scatter_gather_element),
|
1758 |
|
|
DMA_TO_DEVICE);
|
1759 |
|
|
/* Grab SCSI command pointers and check status. */
|
1760 |
|
|
/*
|
1761 |
|
|
* FIXME: If the src field in the status is 1, the ORB DMA must
|
1762 |
|
|
* not be reused until status for a subsequent ORB is received.
|
1763 |
|
|
*/
|
1764 |
|
|
SCpnt = cmd->Current_SCpnt;
|
1765 |
|
|
spin_lock_irqsave(&lu->cmd_orb_lock, flags);
|
1766 |
|
|
sbp2util_mark_command_completed(lu, cmd);
|
1767 |
|
|
spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
|
1768 |
|
|
|
1769 |
|
|
if (SCpnt) {
|
1770 |
|
|
u32 h = sb->ORB_offset_hi_misc;
|
1771 |
|
|
u32 r = STATUS_GET_RESP(h);
|
1772 |
|
|
|
1773 |
|
|
if (r != RESP_STATUS_REQUEST_COMPLETE) {
|
1774 |
|
|
SBP2_INFO("resp 0x%x, sbp_status 0x%x",
|
1775 |
|
|
r, STATUS_GET_SBP_STATUS(h));
|
1776 |
|
|
scsi_status =
|
1777 |
|
|
r == RESP_STATUS_TRANSPORT_FAILURE ?
|
1778 |
|
|
SBP2_SCSI_STATUS_BUSY :
|
1779 |
|
|
SBP2_SCSI_STATUS_COMMAND_TERMINATED;
|
1780 |
|
|
}
|
1781 |
|
|
|
1782 |
|
|
if (STATUS_GET_LEN(h) > 1)
|
1783 |
|
|
scsi_status = sbp2_status_to_sense_data(
|
1784 |
|
|
(unchar *)sb, SCpnt->sense_buffer);
|
1785 |
|
|
|
1786 |
|
|
if (STATUS_TEST_DEAD(h))
|
1787 |
|
|
sbp2_agent_reset(lu, 0);
|
1788 |
|
|
}
|
1789 |
|
|
|
1790 |
|
|
/* Check here to see if there are no commands in-use. If there
|
1791 |
|
|
* are none, we know that the fetch agent left the active state
|
1792 |
|
|
* _and_ that we did not reactivate it yet. Therefore clear
|
1793 |
|
|
* last_orb so that next time we write directly to the
|
1794 |
|
|
* ORB_POINTER register. That way the fetch agent does not need
|
1795 |
|
|
* to refetch the next_ORB. */
|
1796 |
|
|
spin_lock_irqsave(&lu->cmd_orb_lock, flags);
|
1797 |
|
|
if (list_empty(&lu->cmd_orb_inuse))
|
1798 |
|
|
lu->last_orb = NULL;
|
1799 |
|
|
spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
|
1800 |
|
|
|
1801 |
|
|
} else {
|
1802 |
|
|
/* It's probably status after a management request. */
|
1803 |
|
|
if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) ||
|
1804 |
|
|
(sb->ORB_offset_lo == lu->login_orb_dma) ||
|
1805 |
|
|
(sb->ORB_offset_lo == lu->query_logins_orb_dma) ||
|
1806 |
|
|
(sb->ORB_offset_lo == lu->logout_orb_dma)) {
|
1807 |
|
|
lu->access_complete = 1;
|
1808 |
|
|
wake_up_interruptible(&sbp2_access_wq);
|
1809 |
|
|
}
|
1810 |
|
|
}
|
1811 |
|
|
|
1812 |
|
|
if (SCpnt)
|
1813 |
|
|
sbp2scsi_complete_command(lu, scsi_status, SCpnt,
|
1814 |
|
|
cmd->Current_done);
|
1815 |
|
|
return RCODE_COMPLETE;
|
1816 |
|
|
}
|
1817 |
|
|
|
1818 |
|
|
/**************************************
|
1819 |
|
|
* SCSI interface related section
|
1820 |
|
|
**************************************/
|
1821 |
|
|
|
1822 |
|
|
static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
|
1823 |
|
|
void (*done)(struct scsi_cmnd *))
|
1824 |
|
|
{
|
1825 |
|
|
struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
|
1826 |
|
|
struct sbp2_fwhost_info *hi;
|
1827 |
|
|
int result = DID_NO_CONNECT << 16;
|
1828 |
|
|
|
1829 |
|
|
if (unlikely(!sbp2util_node_is_available(lu)))
|
1830 |
|
|
goto done;
|
1831 |
|
|
|
1832 |
|
|
hi = lu->hi;
|
1833 |
|
|
|
1834 |
|
|
if (unlikely(!hi)) {
|
1835 |
|
|
SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!");
|
1836 |
|
|
goto done;
|
1837 |
|
|
}
|
1838 |
|
|
|
1839 |
|
|
/* Multiple units are currently represented to the SCSI core as separate
|
1840 |
|
|
* targets, not as one target with multiple LUs. Therefore return
|
1841 |
|
|
* selection time-out to any IO directed at non-zero LUNs. */
|
1842 |
|
|
if (unlikely(SCpnt->device->lun))
|
1843 |
|
|
goto done;
|
1844 |
|
|
|
1845 |
|
|
if (unlikely(!hpsb_node_entry_valid(lu->ne))) {
|
1846 |
|
|
SBP2_ERR("Bus reset in progress - rejecting command");
|
1847 |
|
|
result = DID_BUS_BUSY << 16;
|
1848 |
|
|
goto done;
|
1849 |
|
|
}
|
1850 |
|
|
|
1851 |
|
|
/* Bidirectional commands are not yet implemented,
|
1852 |
|
|
* and unknown transfer direction not handled. */
|
1853 |
|
|
if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) {
|
1854 |
|
|
SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
|
1855 |
|
|
result = DID_ERROR << 16;
|
1856 |
|
|
goto done;
|
1857 |
|
|
}
|
1858 |
|
|
|
1859 |
|
|
if (sbp2_send_command(lu, SCpnt, done)) {
|
1860 |
|
|
SBP2_ERR("Error sending SCSI command");
|
1861 |
|
|
sbp2scsi_complete_command(lu,
|
1862 |
|
|
SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
|
1863 |
|
|
SCpnt, done);
|
1864 |
|
|
}
|
1865 |
|
|
return 0;
|
1866 |
|
|
|
1867 |
|
|
done:
|
1868 |
|
|
SCpnt->result = result;
|
1869 |
|
|
done(SCpnt);
|
1870 |
|
|
return 0;
|
1871 |
|
|
}
|
1872 |
|
|
|
1873 |
|
|
static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status)
|
1874 |
|
|
{
|
1875 |
|
|
struct sbp2_fwhost_info *hi = lu->hi;
|
1876 |
|
|
struct list_head *lh;
|
1877 |
|
|
struct sbp2_command_info *cmd;
|
1878 |
|
|
unsigned long flags;
|
1879 |
|
|
|
1880 |
|
|
spin_lock_irqsave(&lu->cmd_orb_lock, flags);
|
1881 |
|
|
while (!list_empty(&lu->cmd_orb_inuse)) {
|
1882 |
|
|
lh = lu->cmd_orb_inuse.next;
|
1883 |
|
|
cmd = list_entry(lh, struct sbp2_command_info, list);
|
1884 |
|
|
dma_sync_single_for_cpu(hi->host->device.parent,
|
1885 |
|
|
cmd->command_orb_dma,
|
1886 |
|
|
sizeof(struct sbp2_command_orb),
|
1887 |
|
|
DMA_TO_DEVICE);
|
1888 |
|
|
dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
|
1889 |
|
|
sizeof(cmd->scatter_gather_element),
|
1890 |
|
|
DMA_TO_DEVICE);
|
1891 |
|
|
sbp2util_mark_command_completed(lu, cmd);
|
1892 |
|
|
if (cmd->Current_SCpnt) {
|
1893 |
|
|
cmd->Current_SCpnt->result = status << 16;
|
1894 |
|
|
cmd->Current_done(cmd->Current_SCpnt);
|
1895 |
|
|
}
|
1896 |
|
|
}
|
1897 |
|
|
spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
|
1898 |
|
|
|
1899 |
|
|
return;
|
1900 |
|
|
}
|
1901 |
|
|
|
1902 |
|
|
/*
|
1903 |
|
|
* Complete a regular SCSI command. Can be called in atomic context.
|
1904 |
|
|
*/
|
1905 |
|
|
static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status,
|
1906 |
|
|
struct scsi_cmnd *SCpnt,
|
1907 |
|
|
void (*done)(struct scsi_cmnd *))
|
1908 |
|
|
{
|
1909 |
|
|
if (!SCpnt) {
|
1910 |
|
|
SBP2_ERR("SCpnt is NULL");
|
1911 |
|
|
return;
|
1912 |
|
|
}
|
1913 |
|
|
|
1914 |
|
|
switch (scsi_status) {
|
1915 |
|
|
case SBP2_SCSI_STATUS_GOOD:
|
1916 |
|
|
SCpnt->result = DID_OK << 16;
|
1917 |
|
|
break;
|
1918 |
|
|
|
1919 |
|
|
case SBP2_SCSI_STATUS_BUSY:
|
1920 |
|
|
SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
|
1921 |
|
|
SCpnt->result = DID_BUS_BUSY << 16;
|
1922 |
|
|
break;
|
1923 |
|
|
|
1924 |
|
|
case SBP2_SCSI_STATUS_CHECK_CONDITION:
|
1925 |
|
|
SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
|
1926 |
|
|
break;
|
1927 |
|
|
|
1928 |
|
|
case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
|
1929 |
|
|
SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
|
1930 |
|
|
SCpnt->result = DID_NO_CONNECT << 16;
|
1931 |
|
|
scsi_print_command(SCpnt);
|
1932 |
|
|
break;
|
1933 |
|
|
|
1934 |
|
|
case SBP2_SCSI_STATUS_CONDITION_MET:
|
1935 |
|
|
case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
|
1936 |
|
|
case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
|
1937 |
|
|
SBP2_ERR("Bad SCSI status = %x", scsi_status);
|
1938 |
|
|
SCpnt->result = DID_ERROR << 16;
|
1939 |
|
|
scsi_print_command(SCpnt);
|
1940 |
|
|
break;
|
1941 |
|
|
|
1942 |
|
|
default:
|
1943 |
|
|
SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
|
1944 |
|
|
SCpnt->result = DID_ERROR << 16;
|
1945 |
|
|
}
|
1946 |
|
|
|
1947 |
|
|
/* If a bus reset is in progress and there was an error, complete
|
1948 |
|
|
* the command as busy so that it will get retried. */
|
1949 |
|
|
if (!hpsb_node_entry_valid(lu->ne)
|
1950 |
|
|
&& (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
|
1951 |
|
|
SBP2_ERR("Completing command with busy (bus reset)");
|
1952 |
|
|
SCpnt->result = DID_BUS_BUSY << 16;
|
1953 |
|
|
}
|
1954 |
|
|
|
1955 |
|
|
/* Tell the SCSI stack that we're done with this command. */
|
1956 |
|
|
done(SCpnt);
|
1957 |
|
|
}
|
1958 |
|
|
|
1959 |
|
|
static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
|
1960 |
|
|
{
|
1961 |
|
|
struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
|
1962 |
|
|
|
1963 |
|
|
lu->sdev = sdev;
|
1964 |
|
|
sdev->allow_restart = 1;
|
1965 |
|
|
|
1966 |
|
|
if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36)
|
1967 |
|
|
sdev->inquiry_len = 36;
|
1968 |
|
|
return 0;
|
1969 |
|
|
}
|
1970 |
|
|
|
1971 |
|
|
static int sbp2scsi_slave_configure(struct scsi_device *sdev)
|
1972 |
|
|
{
|
1973 |
|
|
struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
|
1974 |
|
|
|
1975 |
|
|
sdev->use_10_for_rw = 1;
|
1976 |
|
|
|
1977 |
|
|
if (sdev->type == TYPE_ROM)
|
1978 |
|
|
sdev->use_10_for_ms = 1;
|
1979 |
|
|
if (sdev->type == TYPE_DISK &&
|
1980 |
|
|
lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
|
1981 |
|
|
sdev->skip_ms_page_8 = 1;
|
1982 |
|
|
if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
|
1983 |
|
|
sdev->fix_capacity = 1;
|
1984 |
|
|
return 0;
|
1985 |
|
|
}
|
1986 |
|
|
|
1987 |
|
|
static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
|
1988 |
|
|
{
|
1989 |
|
|
((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL;
|
1990 |
|
|
return;
|
1991 |
|
|
}
|
1992 |
|
|
|
1993 |
|
|
/*
|
1994 |
|
|
* Called by scsi stack when something has really gone wrong.
|
1995 |
|
|
* Usually called when a command has timed-out for some reason.
|
1996 |
|
|
*/
|
1997 |
|
|
static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
|
1998 |
|
|
{
|
1999 |
|
|
struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
|
2000 |
|
|
struct sbp2_fwhost_info *hi = lu->hi;
|
2001 |
|
|
struct sbp2_command_info *cmd;
|
2002 |
|
|
unsigned long flags;
|
2003 |
|
|
|
2004 |
|
|
SBP2_INFO("aborting sbp2 command");
|
2005 |
|
|
scsi_print_command(SCpnt);
|
2006 |
|
|
|
2007 |
|
|
if (sbp2util_node_is_available(lu)) {
|
2008 |
|
|
sbp2_agent_reset(lu, 1);
|
2009 |
|
|
|
2010 |
|
|
/* Return a matching command structure to the free pool. */
|
2011 |
|
|
spin_lock_irqsave(&lu->cmd_orb_lock, flags);
|
2012 |
|
|
cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt);
|
2013 |
|
|
if (cmd) {
|
2014 |
|
|
dma_sync_single_for_cpu(hi->host->device.parent,
|
2015 |
|
|
cmd->command_orb_dma,
|
2016 |
|
|
sizeof(struct sbp2_command_orb),
|
2017 |
|
|
DMA_TO_DEVICE);
|
2018 |
|
|
dma_sync_single_for_cpu(hi->host->device.parent,
|
2019 |
|
|
cmd->sge_dma,
|
2020 |
|
|
sizeof(cmd->scatter_gather_element),
|
2021 |
|
|
DMA_TO_DEVICE);
|
2022 |
|
|
sbp2util_mark_command_completed(lu, cmd);
|
2023 |
|
|
if (cmd->Current_SCpnt) {
|
2024 |
|
|
cmd->Current_SCpnt->result = DID_ABORT << 16;
|
2025 |
|
|
cmd->Current_done(cmd->Current_SCpnt);
|
2026 |
|
|
}
|
2027 |
|
|
}
|
2028 |
|
|
spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
|
2029 |
|
|
|
2030 |
|
|
sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
|
2031 |
|
|
}
|
2032 |
|
|
|
2033 |
|
|
return SUCCESS;
|
2034 |
|
|
}
|
2035 |
|
|
|
2036 |
|
|
/*
|
2037 |
|
|
* Called by scsi stack when something has really gone wrong.
|
2038 |
|
|
*/
|
2039 |
|
|
static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
|
2040 |
|
|
{
|
2041 |
|
|
struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
|
2042 |
|
|
|
2043 |
|
|
SBP2_INFO("reset requested");
|
2044 |
|
|
|
2045 |
|
|
if (sbp2util_node_is_available(lu)) {
|
2046 |
|
|
SBP2_INFO("generating sbp2 fetch agent reset");
|
2047 |
|
|
sbp2_agent_reset(lu, 1);
|
2048 |
|
|
}
|
2049 |
|
|
|
2050 |
|
|
return SUCCESS;
|
2051 |
|
|
}
|
2052 |
|
|
|
2053 |
|
|
static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
|
2054 |
|
|
struct device_attribute *attr,
|
2055 |
|
|
char *buf)
|
2056 |
|
|
{
|
2057 |
|
|
struct scsi_device *sdev;
|
2058 |
|
|
struct sbp2_lu *lu;
|
2059 |
|
|
|
2060 |
|
|
if (!(sdev = to_scsi_device(dev)))
|
2061 |
|
|
return 0;
|
2062 |
|
|
|
2063 |
|
|
if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0]))
|
2064 |
|
|
return 0;
|
2065 |
|
|
|
2066 |
|
|
if (sbp2_long_sysfs_ieee1394_id)
|
2067 |
|
|
return sprintf(buf, "%016Lx:%06x:%04x\n",
|
2068 |
|
|
(unsigned long long)lu->ne->guid,
|
2069 |
|
|
lu->ud->directory_id, ORB_SET_LUN(lu->lun));
|
2070 |
|
|
else
|
2071 |
|
|
return sprintf(buf, "%016Lx:%d:%d\n",
|
2072 |
|
|
(unsigned long long)lu->ne->guid,
|
2073 |
|
|
lu->ud->id, ORB_SET_LUN(lu->lun));
|
2074 |
|
|
}
|
2075 |
|
|
|
2076 |
|
|
MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
|
2077 |
|
|
MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
|
2078 |
|
|
MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
|
2079 |
|
|
MODULE_LICENSE("GPL");
|
2080 |
|
|
|
2081 |
|
|
static int sbp2_module_init(void)
|
2082 |
|
|
{
|
2083 |
|
|
int ret;
|
2084 |
|
|
|
2085 |
|
|
if (sbp2_serialize_io) {
|
2086 |
|
|
sbp2_shost_template.can_queue = 1;
|
2087 |
|
|
sbp2_shost_template.cmd_per_lun = 1;
|
2088 |
|
|
}
|
2089 |
|
|
|
2090 |
|
|
if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
|
2091 |
|
|
(sbp2_max_sectors * 512) > (128 * 1024))
|
2092 |
|
|
sbp2_max_sectors = 128 * 1024 / 512;
|
2093 |
|
|
sbp2_shost_template.max_sectors = sbp2_max_sectors;
|
2094 |
|
|
|
2095 |
|
|
hpsb_register_highlevel(&sbp2_highlevel);
|
2096 |
|
|
ret = hpsb_register_protocol(&sbp2_driver);
|
2097 |
|
|
if (ret) {
|
2098 |
|
|
SBP2_ERR("Failed to register protocol");
|
2099 |
|
|
hpsb_unregister_highlevel(&sbp2_highlevel);
|
2100 |
|
|
return ret;
|
2101 |
|
|
}
|
2102 |
|
|
return 0;
|
2103 |
|
|
}
|
2104 |
|
|
|
2105 |
|
|
static void __exit sbp2_module_exit(void)
|
2106 |
|
|
{
|
2107 |
|
|
hpsb_unregister_protocol(&sbp2_driver);
|
2108 |
|
|
hpsb_unregister_highlevel(&sbp2_highlevel);
|
2109 |
|
|
}
|
2110 |
|
|
|
2111 |
|
|
module_init(sbp2_module_init);
|
2112 |
|
|
module_exit(sbp2_module_exit);
|