![Ben Collins](/assets/img/avatar_default.png)
Replace occurrences of the magic value ~(u64)0 for invalid CSR address spaces by a named constant for better readability. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Ben Collins <bcollins@ubuntu.com>
2691 lines
78 KiB
C
2691 lines
78 KiB
C
/*
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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 storage devices as if they were SCSI
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* devices (e.g. mount /dev/sda1, fdisk, mkfs, etc.).
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*
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* Current Issues:
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*
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* - Error Handling: SCSI aborts and bus reset requests are handled somewhat
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* but the code needs additional debugging.
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/string.h>
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#include <linux/stringify.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/fs.h>
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#include <linux/poll.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/types.h>
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#include <linux/delay.h>
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#include <linux/sched.h>
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#include <linux/blkdev.h>
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#include <linux/smp_lock.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <asm/current.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <asm/byteorder.h>
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#include <asm/atomic.h>
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#include <asm/system.h>
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#include <asm/scatterlist.h>
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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 "ieee1394.h"
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#include "ieee1394_types.h"
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#include "ieee1394_core.h"
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#include "nodemgr.h"
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#include "hosts.h"
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#include "highlevel.h"
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#include "ieee1394_transactions.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 max_speed = IEEE1394_SPEED_MAX;
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module_param(max_speed, int, 0644);
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MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb, 1 = 200mb, 0 = 100mb)");
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/*
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* Set serialize_io to 1 if you'd like only one scsi command sent
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* down to us at a time (debugging). This might be necessary for very
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* badly behaved sbp2 devices.
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*
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* TODO: Make this configurable per device.
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*/
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static int serialize_io = 1;
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module_param(serialize_io, int, 0444);
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MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)");
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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 max_sectors = SBP2_MAX_SECTORS;
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module_param(max_sectors, int, 0444);
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MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = "
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__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 exclusive_login = 1;
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module_param(exclusive_login, int, 0644);
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MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)");
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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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/* legacy parameter */
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static int force_inquiry_hack;
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module_param(force_inquiry_hack, int, 0644);
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MODULE_PARM_DESC(force_inquiry_hack, "Deprecated, use 'workarounds'");
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/*
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* Export information about protocols/devices supported by this driver.
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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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/*
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* Debug levels, configured via kernel config, or enable here.
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*/
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#define CONFIG_IEEE1394_SBP2_DEBUG 0
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/* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */
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/* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */
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/* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */
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/* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */
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/* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */
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#ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS
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#define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args)
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static u32 global_outstanding_command_orbs = 0;
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#define outstanding_orb_incr global_outstanding_command_orbs++
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#define outstanding_orb_decr global_outstanding_command_orbs--
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#else
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#define SBP2_ORB_DEBUG(fmt, args...)
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#define outstanding_orb_incr
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#define outstanding_orb_decr
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#endif
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#ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA
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#define SBP2_DMA_ALLOC(fmt, args...) \
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HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \
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++global_outstanding_dmas, ## args)
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#define SBP2_DMA_FREE(fmt, args...) \
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HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \
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--global_outstanding_dmas, ## args)
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static u32 global_outstanding_dmas = 0;
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#else
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#define SBP2_DMA_ALLOC(fmt, args...)
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#define SBP2_DMA_FREE(fmt, args...)
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#endif
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#if CONFIG_IEEE1394_SBP2_DEBUG >= 2
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#define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
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#define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
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#define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
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#define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
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#elif CONFIG_IEEE1394_SBP2_DEBUG == 1
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#define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args)
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#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
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#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
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#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
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#else
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#define SBP2_DEBUG(fmt, args...)
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#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
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#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
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#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
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#endif
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#define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
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#define SBP2_DEBUG_ENTER() SBP2_DEBUG("%s", __FUNCTION__)
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/*
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* Globals
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*/
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static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
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u32 status);
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static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
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u32 scsi_status, struct scsi_cmnd *SCpnt,
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void (*done)(struct scsi_cmnd *));
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static struct scsi_host_template scsi_driver_template;
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static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
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static void sbp2_host_reset(struct hpsb_host *host);
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static int sbp2_probe(struct device *dev);
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static int sbp2_remove(struct device *dev);
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static int sbp2_update(struct unit_directory *ud);
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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 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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static struct hpsb_protocol_driver sbp2_driver = {
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.name = "SBP2 Driver",
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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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.name = SBP2_DEVICE_NAME,
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.bus = &ieee1394_bus_type,
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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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/*
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* List of devices with known bugs.
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*
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* The firmware_revision field, masked with 0xffff00, is the best indicator
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* for the type of bridge chip of a device. It yields a few false positives
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* but this did not break correctly behaving devices so far.
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*/
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static const struct {
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u32 firmware_revision;
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u32 model_id;
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unsigned workarounds;
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} sbp2_workarounds_table[] = {
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/* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
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.firmware_revision = 0x002800,
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.model_id = 0x001010,
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.workarounds = SBP2_WORKAROUND_INQUIRY_36 |
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SBP2_WORKAROUND_MODE_SENSE_8,
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},
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/* Initio bridges, actually only needed for some older ones */ {
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.firmware_revision = 0x000200,
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.workarounds = SBP2_WORKAROUND_INQUIRY_36,
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},
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/* Symbios bridge */ {
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.firmware_revision = 0xa0b800,
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.workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
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},
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/*
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* Note about the following Apple iPod blacklist entries:
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*
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* There are iPods (2nd gen, 3rd gen) with model_id==0. Since our
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* matching logic treats 0 as a wildcard, we cannot match this ID
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* without rewriting the matching routine. Fortunately these iPods
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* do not feature the read_capacity bug according to one report.
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* Read_capacity behaviour as well as model_id could change due to
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* Apple-supplied firmware updates though.
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*/
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/* iPod 4th generation */ {
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.firmware_revision = 0x0a2700,
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.model_id = 0x000021,
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.workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
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},
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/* iPod mini */ {
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.firmware_revision = 0x0a2700,
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.model_id = 0x000023,
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.workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
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},
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/* iPod Photo */ {
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.firmware_revision = 0x0a2700,
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.model_id = 0x00007e,
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.workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
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}
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};
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/**************************************
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* General utility functions
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**************************************/
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#ifndef __BIG_ENDIAN
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/*
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* Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
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*/
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static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
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{
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u32 *temp = buffer;
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for (length = (length >> 2); length--; )
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temp[length] = be32_to_cpu(temp[length]);
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return;
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}
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/*
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* Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
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*/
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static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
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{
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u32 *temp = buffer;
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for (length = (length >> 2); length--; )
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temp[length] = cpu_to_be32(temp[length]);
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return;
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}
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#else /* BIG_ENDIAN */
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/* Why waste the cpu cycles? */
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#define sbp2util_be32_to_cpu_buffer(x,y)
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#define sbp2util_cpu_to_be32_buffer(x,y)
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#endif
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#ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
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/*
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* Debug packet dump routine. Length is in bytes.
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*/
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static void sbp2util_packet_dump(void *buffer, int length, char *dump_name,
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u32 dump_phys_addr)
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{
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int i;
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unsigned char *dump = buffer;
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if (!dump || !length || !dump_name)
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return;
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if (dump_phys_addr)
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printk("[%s, 0x%x]", dump_name, dump_phys_addr);
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else
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printk("[%s]", dump_name);
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for (i = 0; i < length; i++) {
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if (i > 0x3f) {
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printk("\n ...");
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break;
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}
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if ((i & 0x3) == 0)
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printk(" ");
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if ((i & 0xf) == 0)
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printk("\n ");
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printk("%02x ", (int)dump[i]);
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}
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printk("\n");
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return;
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}
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#else
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#define sbp2util_packet_dump(w,x,y,z)
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#endif
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/*
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* Goofy routine that basically does a down_timeout function.
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*/
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static int sbp2util_down_timeout(atomic_t *done, int timeout)
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{
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int i;
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for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) {
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if (msleep_interruptible(100)) /* 100ms */
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return 1;
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}
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return (i > 0) ? 0 : 1;
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}
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/* Free's an allocated packet */
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static void sbp2_free_packet(struct hpsb_packet *packet)
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{
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hpsb_free_tlabel(packet);
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hpsb_free_packet(packet);
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}
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/* This is much like hpsb_node_write(), except it ignores the response
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* subaction and returns immediately. Can be used from interrupts.
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*/
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static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
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quadlet_t *buffer, size_t length)
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{
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struct hpsb_packet *packet;
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packet = hpsb_make_writepacket(ne->host, ne->nodeid,
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addr, buffer, length);
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if (!packet)
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return -ENOMEM;
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hpsb_set_packet_complete_task(packet,
|
|
(void (*)(void *))sbp2_free_packet,
|
|
packet);
|
|
|
|
hpsb_node_fill_packet(ne, packet);
|
|
|
|
if (hpsb_send_packet(packet) < 0) {
|
|
sbp2_free_packet(packet);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function is called to create a pool of command orbs used for
|
|
* command processing. It is called when a new sbp2 device is detected.
|
|
*/
|
|
static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id)
|
|
{
|
|
struct sbp2scsi_host_info *hi = scsi_id->hi;
|
|
int i;
|
|
unsigned long flags, orbs;
|
|
struct sbp2_command_info *command;
|
|
|
|
orbs = serialize_io ? 2 : SBP2_MAX_CMDS;
|
|
|
|
spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
|
|
for (i = 0; i < orbs; i++) {
|
|
command = kzalloc(sizeof(*command), GFP_ATOMIC);
|
|
if (!command) {
|
|
spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock,
|
|
flags);
|
|
return -ENOMEM;
|
|
}
|
|
command->command_orb_dma =
|
|
pci_map_single(hi->host->pdev, &command->command_orb,
|
|
sizeof(struct sbp2_command_orb),
|
|
PCI_DMA_BIDIRECTIONAL);
|
|
SBP2_DMA_ALLOC("single command orb DMA");
|
|
command->sge_dma =
|
|
pci_map_single(hi->host->pdev,
|
|
&command->scatter_gather_element,
|
|
sizeof(command->scatter_gather_element),
|
|
PCI_DMA_BIDIRECTIONAL);
|
|
SBP2_DMA_ALLOC("scatter_gather_element");
|
|
INIT_LIST_HEAD(&command->list);
|
|
list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
|
|
}
|
|
spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function is called to delete a pool of command orbs.
|
|
*/
|
|
static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id)
|
|
{
|
|
struct hpsb_host *host = scsi_id->hi->host;
|
|
struct list_head *lh, *next;
|
|
struct sbp2_command_info *command;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
|
|
if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
|
|
list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) {
|
|
command = list_entry(lh, struct sbp2_command_info, list);
|
|
|
|
/* Release our generic DMA's */
|
|
pci_unmap_single(host->pdev, command->command_orb_dma,
|
|
sizeof(struct sbp2_command_orb),
|
|
PCI_DMA_BIDIRECTIONAL);
|
|
SBP2_DMA_FREE("single command orb DMA");
|
|
pci_unmap_single(host->pdev, command->sge_dma,
|
|
sizeof(command->scatter_gather_element),
|
|
PCI_DMA_BIDIRECTIONAL);
|
|
SBP2_DMA_FREE("scatter_gather_element");
|
|
|
|
kfree(command);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* This function finds the sbp2_command for a given outstanding command
|
|
* orb.Only looks at the inuse list.
|
|
*/
|
|
static struct sbp2_command_info *sbp2util_find_command_for_orb(
|
|
struct scsi_id_instance_data *scsi_id, dma_addr_t orb)
|
|
{
|
|
struct sbp2_command_info *command;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
|
|
if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
|
|
list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
|
|
if (command->command_orb_dma == orb) {
|
|
spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
|
|
return command;
|
|
}
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
|
|
|
|
SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* This function finds the sbp2_command for a given outstanding SCpnt.
|
|
* Only looks at the inuse list.
|
|
* Must be called with scsi_id->sbp2_command_orb_lock held.
|
|
*/
|
|
static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(
|
|
struct scsi_id_instance_data *scsi_id, void *SCpnt)
|
|
{
|
|
struct sbp2_command_info *command;
|
|
|
|
if (!list_empty(&scsi_id->sbp2_command_orb_inuse))
|
|
list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list)
|
|
if (command->Current_SCpnt == SCpnt)
|
|
return command;
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* This function allocates a command orb used to send a scsi command.
|
|
*/
|
|
static struct sbp2_command_info *sbp2util_allocate_command_orb(
|
|
struct scsi_id_instance_data *scsi_id,
|
|
struct scsi_cmnd *Current_SCpnt,
|
|
void (*Current_done)(struct scsi_cmnd *))
|
|
{
|
|
struct list_head *lh;
|
|
struct sbp2_command_info *command = NULL;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
|
|
if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
|
|
lh = scsi_id->sbp2_command_orb_completed.next;
|
|
list_del(lh);
|
|
command = list_entry(lh, struct sbp2_command_info, list);
|
|
command->Current_done = Current_done;
|
|
command->Current_SCpnt = Current_SCpnt;
|
|
list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse);
|
|
} else {
|
|
SBP2_ERR("%s: no orbs available", __FUNCTION__);
|
|
}
|
|
spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
|
|
return command;
|
|
}
|
|
|
|
/* Free our DMA's */
|
|
static void sbp2util_free_command_dma(struct sbp2_command_info *command)
|
|
{
|
|
struct scsi_id_instance_data *scsi_id =
|
|
(struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0];
|
|
struct hpsb_host *host;
|
|
|
|
if (!scsi_id) {
|
|
SBP2_ERR("%s: scsi_id == NULL", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
host = scsi_id->ud->ne->host;
|
|
|
|
if (command->cmd_dma) {
|
|
if (command->dma_type == CMD_DMA_SINGLE) {
|
|
pci_unmap_single(host->pdev, command->cmd_dma,
|
|
command->dma_size, command->dma_dir);
|
|
SBP2_DMA_FREE("single bulk");
|
|
} else if (command->dma_type == CMD_DMA_PAGE) {
|
|
pci_unmap_page(host->pdev, command->cmd_dma,
|
|
command->dma_size, command->dma_dir);
|
|
SBP2_DMA_FREE("single page");
|
|
} /* XXX: Check for CMD_DMA_NONE bug */
|
|
command->dma_type = CMD_DMA_NONE;
|
|
command->cmd_dma = 0;
|
|
}
|
|
|
|
if (command->sge_buffer) {
|
|
pci_unmap_sg(host->pdev, command->sge_buffer,
|
|
command->dma_size, command->dma_dir);
|
|
SBP2_DMA_FREE("scatter list");
|
|
command->sge_buffer = NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This function moves a command to the completed orb list.
|
|
* Must be called with scsi_id->sbp2_command_orb_lock held.
|
|
*/
|
|
static void sbp2util_mark_command_completed(
|
|
struct scsi_id_instance_data *scsi_id,
|
|
struct sbp2_command_info *command)
|
|
{
|
|
list_del(&command->list);
|
|
sbp2util_free_command_dma(command);
|
|
list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
|
|
}
|
|
|
|
/*
|
|
* Is scsi_id valid? Is the 1394 node still present?
|
|
*/
|
|
static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id)
|
|
{
|
|
return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo;
|
|
}
|
|
|
|
/*********************************************
|
|
* IEEE-1394 core driver stack related section
|
|
*********************************************/
|
|
static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud);
|
|
|
|
static int sbp2_probe(struct device *dev)
|
|
{
|
|
struct unit_directory *ud;
|
|
struct scsi_id_instance_data *scsi_id;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
ud = container_of(dev, struct unit_directory, device);
|
|
|
|
/* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
|
|
* instead. */
|
|
if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
|
|
return -ENODEV;
|
|
|
|
scsi_id = sbp2_alloc_device(ud);
|
|
|
|
if (!scsi_id)
|
|
return -ENOMEM;
|
|
|
|
sbp2_parse_unit_directory(scsi_id, ud);
|
|
|
|
return sbp2_start_device(scsi_id);
|
|
}
|
|
|
|
static int sbp2_remove(struct device *dev)
|
|
{
|
|
struct unit_directory *ud;
|
|
struct scsi_id_instance_data *scsi_id;
|
|
struct scsi_device *sdev;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
ud = container_of(dev, struct unit_directory, device);
|
|
scsi_id = ud->device.driver_data;
|
|
if (!scsi_id)
|
|
return 0;
|
|
|
|
if (scsi_id->scsi_host) {
|
|
/* Get rid of enqueued commands if there is no chance to
|
|
* send them. */
|
|
if (!sbp2util_node_is_available(scsi_id))
|
|
sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT);
|
|
/* scsi_remove_device() will trigger shutdown functions of SCSI
|
|
* highlevel drivers which would deadlock if blocked. */
|
|
scsi_unblock_requests(scsi_id->scsi_host);
|
|
}
|
|
sdev = scsi_id->sdev;
|
|
if (sdev) {
|
|
scsi_id->sdev = NULL;
|
|
scsi_remove_device(sdev);
|
|
}
|
|
|
|
sbp2_logout_device(scsi_id);
|
|
sbp2_remove_device(scsi_id);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sbp2_update(struct unit_directory *ud)
|
|
{
|
|
struct scsi_id_instance_data *scsi_id = ud->device.driver_data;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
if (sbp2_reconnect_device(scsi_id)) {
|
|
|
|
/*
|
|
* Ok, reconnect has failed. Perhaps we didn't
|
|
* reconnect fast enough. Try doing a regular login, but
|
|
* first do a logout just in case of any weirdness.
|
|
*/
|
|
sbp2_logout_device(scsi_id);
|
|
|
|
if (sbp2_login_device(scsi_id)) {
|
|
/* Login failed too, just fail, and the backend
|
|
* will call our sbp2_remove for us */
|
|
SBP2_ERR("Failed to reconnect to sbp2 device!");
|
|
return -EBUSY;
|
|
}
|
|
}
|
|
|
|
/* Set max retries to something large on the device. */
|
|
sbp2_set_busy_timeout(scsi_id);
|
|
|
|
/* Do a SBP-2 fetch agent reset. */
|
|
sbp2_agent_reset(scsi_id, 1);
|
|
|
|
/* Get the max speed and packet size that we can use. */
|
|
sbp2_max_speed_and_size(scsi_id);
|
|
|
|
/* Complete any pending commands with busy (so they get
|
|
* retried) and remove them from our queue
|
|
*/
|
|
sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
|
|
|
|
/* Make sure we unblock requests (since this is likely after a bus
|
|
* reset). */
|
|
scsi_unblock_requests(scsi_id->scsi_host);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* This functions is called by the sbp2_probe, for each new device. We now
|
|
* allocate one scsi host for each scsi_id (unit directory). */
|
|
static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud)
|
|
{
|
|
struct sbp2scsi_host_info *hi;
|
|
struct Scsi_Host *scsi_host = NULL;
|
|
struct scsi_id_instance_data *scsi_id = NULL;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL);
|
|
if (!scsi_id) {
|
|
SBP2_ERR("failed to create scsi_id");
|
|
goto failed_alloc;
|
|
}
|
|
|
|
scsi_id->ne = ud->ne;
|
|
scsi_id->ud = ud;
|
|
scsi_id->speed_code = IEEE1394_SPEED_100;
|
|
scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
|
|
scsi_id->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
|
|
atomic_set(&scsi_id->sbp2_login_complete, 0);
|
|
INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse);
|
|
INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed);
|
|
INIT_LIST_HEAD(&scsi_id->scsi_list);
|
|
spin_lock_init(&scsi_id->sbp2_command_orb_lock);
|
|
|
|
ud->device.driver_data = scsi_id;
|
|
|
|
hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
|
|
if (!hi) {
|
|
hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi));
|
|
if (!hi) {
|
|
SBP2_ERR("failed to allocate hostinfo");
|
|
goto failed_alloc;
|
|
}
|
|
SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo");
|
|
hi->host = ud->ne->host;
|
|
INIT_LIST_HEAD(&hi->scsi_ids);
|
|
|
|
#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
|
|
/* Handle data movement if physical dma is not
|
|
* enabled or not supported on host controller */
|
|
if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
|
|
&sbp2_physdma_ops,
|
|
0x0ULL, 0xfffffffcULL)) {
|
|
SBP2_ERR("failed to register lower 4GB address range");
|
|
goto failed_alloc;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* Prevent unloading of the 1394 host */
|
|
if (!try_module_get(hi->host->driver->owner)) {
|
|
SBP2_ERR("failed to get a reference on 1394 host driver");
|
|
goto failed_alloc;
|
|
}
|
|
|
|
scsi_id->hi = hi;
|
|
|
|
list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids);
|
|
|
|
/* Register the status FIFO address range. We could use the same FIFO
|
|
* for targets at different nodes. However we need different FIFOs per
|
|
* target in order to support multi-unit devices.
|
|
* The FIFO is located out of the local host controller's physical range
|
|
* but, if possible, within the posted write area. Status writes will
|
|
* then be performed as unified transactions. This slightly reduces
|
|
* bandwidth usage, and some Prolific based devices seem to require it.
|
|
*/
|
|
scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace(
|
|
&sbp2_highlevel, ud->ne->host, &sbp2_ops,
|
|
sizeof(struct sbp2_status_block), sizeof(quadlet_t),
|
|
ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
|
|
if (scsi_id->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
|
|
SBP2_ERR("failed to allocate status FIFO address range");
|
|
goto failed_alloc;
|
|
}
|
|
|
|
/* Register our host with the SCSI stack. */
|
|
scsi_host = scsi_host_alloc(&scsi_driver_template,
|
|
sizeof(unsigned long));
|
|
if (!scsi_host) {
|
|
SBP2_ERR("failed to register scsi host");
|
|
goto failed_alloc;
|
|
}
|
|
|
|
scsi_host->hostdata[0] = (unsigned long)scsi_id;
|
|
|
|
if (!scsi_add_host(scsi_host, &ud->device)) {
|
|
scsi_id->scsi_host = scsi_host;
|
|
return scsi_id;
|
|
}
|
|
|
|
SBP2_ERR("failed to add scsi host");
|
|
scsi_host_put(scsi_host);
|
|
|
|
failed_alloc:
|
|
sbp2_remove_device(scsi_id);
|
|
return NULL;
|
|
}
|
|
|
|
static void sbp2_host_reset(struct hpsb_host *host)
|
|
{
|
|
struct sbp2scsi_host_info *hi;
|
|
struct scsi_id_instance_data *scsi_id;
|
|
|
|
hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
|
|
|
|
if (hi) {
|
|
list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list)
|
|
scsi_block_requests(scsi_id->scsi_host);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This function is where we first pull the node unique ids, and then
|
|
* allocate memory and register a SBP-2 device.
|
|
*/
|
|
static int sbp2_start_device(struct scsi_id_instance_data *scsi_id)
|
|
{
|
|
struct sbp2scsi_host_info *hi = scsi_id->hi;
|
|
int error;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
/* Login FIFO DMA */
|
|
scsi_id->login_response =
|
|
pci_alloc_consistent(hi->host->pdev,
|
|
sizeof(struct sbp2_login_response),
|
|
&scsi_id->login_response_dma);
|
|
if (!scsi_id->login_response)
|
|
goto alloc_fail;
|
|
SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
|
|
|
|
/* Query logins ORB DMA */
|
|
scsi_id->query_logins_orb =
|
|
pci_alloc_consistent(hi->host->pdev,
|
|
sizeof(struct sbp2_query_logins_orb),
|
|
&scsi_id->query_logins_orb_dma);
|
|
if (!scsi_id->query_logins_orb)
|
|
goto alloc_fail;
|
|
SBP2_DMA_ALLOC("consistent DMA region for query logins ORB");
|
|
|
|
/* Query logins response DMA */
|
|
scsi_id->query_logins_response =
|
|
pci_alloc_consistent(hi->host->pdev,
|
|
sizeof(struct sbp2_query_logins_response),
|
|
&scsi_id->query_logins_response_dma);
|
|
if (!scsi_id->query_logins_response)
|
|
goto alloc_fail;
|
|
SBP2_DMA_ALLOC("consistent DMA region for query logins response");
|
|
|
|
/* Reconnect ORB DMA */
|
|
scsi_id->reconnect_orb =
|
|
pci_alloc_consistent(hi->host->pdev,
|
|
sizeof(struct sbp2_reconnect_orb),
|
|
&scsi_id->reconnect_orb_dma);
|
|
if (!scsi_id->reconnect_orb)
|
|
goto alloc_fail;
|
|
SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
|
|
|
|
/* Logout ORB DMA */
|
|
scsi_id->logout_orb =
|
|
pci_alloc_consistent(hi->host->pdev,
|
|
sizeof(struct sbp2_logout_orb),
|
|
&scsi_id->logout_orb_dma);
|
|
if (!scsi_id->logout_orb)
|
|
goto alloc_fail;
|
|
SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
|
|
|
|
/* Login ORB DMA */
|
|
scsi_id->login_orb =
|
|
pci_alloc_consistent(hi->host->pdev,
|
|
sizeof(struct sbp2_login_orb),
|
|
&scsi_id->login_orb_dma);
|
|
if (!scsi_id->login_orb)
|
|
goto alloc_fail;
|
|
SBP2_DMA_ALLOC("consistent DMA region for login ORB");
|
|
|
|
SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id);
|
|
|
|
/*
|
|
* Create our command orb pool
|
|
*/
|
|
if (sbp2util_create_command_orb_pool(scsi_id)) {
|
|
SBP2_ERR("sbp2util_create_command_orb_pool failed!");
|
|
sbp2_remove_device(scsi_id);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Schedule a timeout here. The reason is that we may be so close
|
|
* to a bus reset, that the device is not available for logins.
|
|
* This can happen when the bus reset is caused by the host
|
|
* connected to the sbp2 device being removed. That host would
|
|
* have a certain amount of time to relogin before the sbp2 device
|
|
* allows someone else to login instead. One second makes sense. */
|
|
msleep_interruptible(1000);
|
|
if (signal_pending(current)) {
|
|
sbp2_remove_device(scsi_id);
|
|
return -EINTR;
|
|
}
|
|
|
|
/*
|
|
* Login to the sbp-2 device
|
|
*/
|
|
if (sbp2_login_device(scsi_id)) {
|
|
/* Login failed, just remove the device. */
|
|
sbp2_remove_device(scsi_id);
|
|
return -EBUSY;
|
|
}
|
|
|
|
/*
|
|
* Set max retries to something large on the device
|
|
*/
|
|
sbp2_set_busy_timeout(scsi_id);
|
|
|
|
/*
|
|
* Do a SBP-2 fetch agent reset
|
|
*/
|
|
sbp2_agent_reset(scsi_id, 1);
|
|
|
|
/*
|
|
* Get the max speed and packet size that we can use
|
|
*/
|
|
sbp2_max_speed_and_size(scsi_id);
|
|
|
|
/* Add this device to the scsi layer now */
|
|
error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0);
|
|
if (error) {
|
|
SBP2_ERR("scsi_add_device failed");
|
|
sbp2_logout_device(scsi_id);
|
|
sbp2_remove_device(scsi_id);
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
|
|
alloc_fail:
|
|
SBP2_ERR("Could not allocate memory for scsi_id");
|
|
sbp2_remove_device(scsi_id);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/*
|
|
* This function removes an sbp2 device from the sbp2scsi_host_info struct.
|
|
*/
|
|
static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
|
|
{
|
|
struct sbp2scsi_host_info *hi;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
if (!scsi_id)
|
|
return;
|
|
|
|
hi = scsi_id->hi;
|
|
|
|
/* This will remove our scsi device aswell */
|
|
if (scsi_id->scsi_host) {
|
|
scsi_remove_host(scsi_id->scsi_host);
|
|
scsi_host_put(scsi_id->scsi_host);
|
|
}
|
|
|
|
sbp2util_remove_command_orb_pool(scsi_id);
|
|
|
|
list_del(&scsi_id->scsi_list);
|
|
|
|
if (scsi_id->login_response) {
|
|
pci_free_consistent(hi->host->pdev,
|
|
sizeof(struct sbp2_login_response),
|
|
scsi_id->login_response,
|
|
scsi_id->login_response_dma);
|
|
SBP2_DMA_FREE("single login FIFO");
|
|
}
|
|
|
|
if (scsi_id->login_orb) {
|
|
pci_free_consistent(hi->host->pdev,
|
|
sizeof(struct sbp2_login_orb),
|
|
scsi_id->login_orb,
|
|
scsi_id->login_orb_dma);
|
|
SBP2_DMA_FREE("single login ORB");
|
|
}
|
|
|
|
if (scsi_id->reconnect_orb) {
|
|
pci_free_consistent(hi->host->pdev,
|
|
sizeof(struct sbp2_reconnect_orb),
|
|
scsi_id->reconnect_orb,
|
|
scsi_id->reconnect_orb_dma);
|
|
SBP2_DMA_FREE("single reconnect orb");
|
|
}
|
|
|
|
if (scsi_id->logout_orb) {
|
|
pci_free_consistent(hi->host->pdev,
|
|
sizeof(struct sbp2_logout_orb),
|
|
scsi_id->logout_orb,
|
|
scsi_id->logout_orb_dma);
|
|
SBP2_DMA_FREE("single logout orb");
|
|
}
|
|
|
|
if (scsi_id->query_logins_orb) {
|
|
pci_free_consistent(hi->host->pdev,
|
|
sizeof(struct sbp2_query_logins_orb),
|
|
scsi_id->query_logins_orb,
|
|
scsi_id->query_logins_orb_dma);
|
|
SBP2_DMA_FREE("single query logins orb");
|
|
}
|
|
|
|
if (scsi_id->query_logins_response) {
|
|
pci_free_consistent(hi->host->pdev,
|
|
sizeof(struct sbp2_query_logins_response),
|
|
scsi_id->query_logins_response,
|
|
scsi_id->query_logins_response_dma);
|
|
SBP2_DMA_FREE("single query logins data");
|
|
}
|
|
|
|
if (scsi_id->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
|
|
hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
|
|
scsi_id->status_fifo_addr);
|
|
|
|
scsi_id->ud->device.driver_data = NULL;
|
|
|
|
if (hi)
|
|
module_put(hi->host->driver->owner);
|
|
|
|
SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id);
|
|
|
|
kfree(scsi_id);
|
|
}
|
|
|
|
#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
|
|
/*
|
|
* This function deals with physical dma write requests (for adapters that do not support
|
|
* physical dma in hardware). Mostly just here for debugging...
|
|
*/
|
|
static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
|
|
int destid, quadlet_t *data, u64 addr,
|
|
size_t length, u16 flags)
|
|
{
|
|
|
|
/*
|
|
* Manually put the data in the right place.
|
|
*/
|
|
memcpy(bus_to_virt((u32) addr), data, length);
|
|
sbp2util_packet_dump(data, length, "sbp2 phys dma write by device",
|
|
(u32) addr);
|
|
return RCODE_COMPLETE;
|
|
}
|
|
|
|
/*
|
|
* This function deals with physical dma read requests (for adapters that do not support
|
|
* physical dma in hardware). Mostly just here for debugging...
|
|
*/
|
|
static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
|
|
quadlet_t *data, u64 addr, size_t length,
|
|
u16 flags)
|
|
{
|
|
|
|
/*
|
|
* Grab data from memory and send a read response.
|
|
*/
|
|
memcpy(data, bus_to_virt((u32) addr), length);
|
|
sbp2util_packet_dump(data, length, "sbp2 phys dma read by device",
|
|
(u32) addr);
|
|
return RCODE_COMPLETE;
|
|
}
|
|
#endif
|
|
|
|
/**************************************
|
|
* SBP-2 protocol related section
|
|
**************************************/
|
|
|
|
/*
|
|
* This function queries the device for the maximum concurrent logins it
|
|
* supports.
|
|
*/
|
|
static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
|
|
{
|
|
struct sbp2scsi_host_info *hi = scsi_id->hi;
|
|
quadlet_t data[2];
|
|
int max_logins;
|
|
int active_logins;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
scsi_id->query_logins_orb->reserved1 = 0x0;
|
|
scsi_id->query_logins_orb->reserved2 = 0x0;
|
|
|
|
scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma;
|
|
scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
|
|
|
|
scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
|
|
scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
|
|
scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun);
|
|
|
|
scsi_id->query_logins_orb->reserved_resp_length =
|
|
ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response));
|
|
|
|
scsi_id->query_logins_orb->status_fifo_hi =
|
|
ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
|
|
scsi_id->query_logins_orb->status_fifo_lo =
|
|
ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
|
|
|
|
sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb));
|
|
|
|
sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb),
|
|
"sbp2 query logins orb", scsi_id->query_logins_orb_dma);
|
|
|
|
memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response));
|
|
memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
|
|
|
|
data[0] = ORB_SET_NODE_ID(hi->host->node_id);
|
|
data[1] = scsi_id->query_logins_orb_dma;
|
|
sbp2util_cpu_to_be32_buffer(data, 8);
|
|
|
|
atomic_set(&scsi_id->sbp2_login_complete, 0);
|
|
|
|
hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
|
|
|
|
if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) {
|
|
SBP2_INFO("Error querying logins to SBP-2 device - timed out");
|
|
return -EIO;
|
|
}
|
|
|
|
if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) {
|
|
SBP2_INFO("Error querying logins to SBP-2 device - timed out");
|
|
return -EIO;
|
|
}
|
|
|
|
if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
|
|
STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
|
|
STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
|
|
|
|
SBP2_INFO("Error querying logins to SBP-2 device - timed out");
|
|
return -EIO;
|
|
}
|
|
|
|
sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response));
|
|
|
|
SBP2_DEBUG("length_max_logins = %x",
|
|
(unsigned int)scsi_id->query_logins_response->length_max_logins);
|
|
|
|
max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins);
|
|
SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
|
|
|
|
active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins);
|
|
SBP2_INFO("Number of active logins: %d", active_logins);
|
|
|
|
if (active_logins >= max_logins) {
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function is called in order to login to a particular SBP-2 device,
|
|
* after a bus reset.
|
|
*/
|
|
static int sbp2_login_device(struct scsi_id_instance_data *scsi_id)
|
|
{
|
|
struct sbp2scsi_host_info *hi = scsi_id->hi;
|
|
quadlet_t data[2];
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
if (!scsi_id->login_orb) {
|
|
SBP2_DEBUG("%s: login_orb not alloc'd!", __FUNCTION__);
|
|
return -EIO;
|
|
}
|
|
|
|
if (!exclusive_login) {
|
|
if (sbp2_query_logins(scsi_id)) {
|
|
SBP2_INFO("Device does not support any more concurrent logins");
|
|
return -EIO;
|
|
}
|
|
}
|
|
|
|
/* Set-up login ORB, assume no password */
|
|
scsi_id->login_orb->password_hi = 0;
|
|
scsi_id->login_orb->password_lo = 0;
|
|
|
|
scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma;
|
|
scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
|
|
|
|
scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
|
|
scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */
|
|
scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */
|
|
scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */
|
|
scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun);
|
|
|
|
scsi_id->login_orb->passwd_resp_lengths =
|
|
ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
|
|
|
|
scsi_id->login_orb->status_fifo_hi =
|
|
ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
|
|
scsi_id->login_orb->status_fifo_lo =
|
|
ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
|
|
|
|
sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb));
|
|
|
|
sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb),
|
|
"sbp2 login orb", scsi_id->login_orb_dma);
|
|
|
|
memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response));
|
|
memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
|
|
|
|
data[0] = ORB_SET_NODE_ID(hi->host->node_id);
|
|
data[1] = scsi_id->login_orb_dma;
|
|
sbp2util_cpu_to_be32_buffer(data, 8);
|
|
|
|
atomic_set(&scsi_id->sbp2_login_complete, 0);
|
|
|
|
hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
|
|
|
|
/*
|
|
* Wait for login status (up to 20 seconds)...
|
|
*/
|
|
if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) {
|
|
SBP2_ERR("Error logging into SBP-2 device - login timed-out");
|
|
return -EIO;
|
|
}
|
|
|
|
/*
|
|
* Sanity. Make sure status returned matches login orb.
|
|
*/
|
|
if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) {
|
|
SBP2_ERR("Error logging into SBP-2 device - login timed-out");
|
|
return -EIO;
|
|
}
|
|
|
|
/*
|
|
* Check status
|
|
*/
|
|
if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
|
|
STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
|
|
STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
|
|
|
|
SBP2_ERR("Error logging into SBP-2 device - login failed");
|
|
return -EIO;
|
|
}
|
|
|
|
/*
|
|
* Byte swap the login response, for use when reconnecting or
|
|
* logging out.
|
|
*/
|
|
sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response));
|
|
|
|
/*
|
|
* Grab our command block agent address from the login response.
|
|
*/
|
|
SBP2_DEBUG("command_block_agent_hi = %x",
|
|
(unsigned int)scsi_id->login_response->command_block_agent_hi);
|
|
SBP2_DEBUG("command_block_agent_lo = %x",
|
|
(unsigned int)scsi_id->login_response->command_block_agent_lo);
|
|
|
|
scsi_id->sbp2_command_block_agent_addr =
|
|
((u64)scsi_id->login_response->command_block_agent_hi) << 32;
|
|
scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo);
|
|
scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL;
|
|
|
|
SBP2_INFO("Logged into SBP-2 device");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
/*
|
|
* This function is called in order to logout from a particular SBP-2
|
|
* device, usually called during driver unload.
|
|
*/
|
|
static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id)
|
|
{
|
|
struct sbp2scsi_host_info *hi = scsi_id->hi;
|
|
quadlet_t data[2];
|
|
int error;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
/*
|
|
* Set-up logout ORB
|
|
*/
|
|
scsi_id->logout_orb->reserved1 = 0x0;
|
|
scsi_id->logout_orb->reserved2 = 0x0;
|
|
scsi_id->logout_orb->reserved3 = 0x0;
|
|
scsi_id->logout_orb->reserved4 = 0x0;
|
|
|
|
scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
|
|
scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
|
|
|
|
/* Notify us when complete */
|
|
scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
|
|
|
|
scsi_id->logout_orb->reserved5 = 0x0;
|
|
scsi_id->logout_orb->status_fifo_hi =
|
|
ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
|
|
scsi_id->logout_orb->status_fifo_lo =
|
|
ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
|
|
|
|
/*
|
|
* Byte swap ORB if necessary
|
|
*/
|
|
sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb));
|
|
|
|
sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb),
|
|
"sbp2 logout orb", scsi_id->logout_orb_dma);
|
|
|
|
/*
|
|
* Ok, let's write to the target's management agent register
|
|
*/
|
|
data[0] = ORB_SET_NODE_ID(hi->host->node_id);
|
|
data[1] = scsi_id->logout_orb_dma;
|
|
sbp2util_cpu_to_be32_buffer(data, 8);
|
|
|
|
atomic_set(&scsi_id->sbp2_login_complete, 0);
|
|
|
|
error = hpsb_node_write(scsi_id->ne,
|
|
scsi_id->sbp2_management_agent_addr, data, 8);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Wait for device to logout...1 second. */
|
|
if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ))
|
|
return -EIO;
|
|
|
|
SBP2_INFO("Logged out of SBP-2 device");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
/*
|
|
* This function is called in order to reconnect to a particular SBP-2
|
|
* device, after a bus reset.
|
|
*/
|
|
static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id)
|
|
{
|
|
struct sbp2scsi_host_info *hi = scsi_id->hi;
|
|
quadlet_t data[2];
|
|
int error;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
/*
|
|
* Set-up reconnect ORB
|
|
*/
|
|
scsi_id->reconnect_orb->reserved1 = 0x0;
|
|
scsi_id->reconnect_orb->reserved2 = 0x0;
|
|
scsi_id->reconnect_orb->reserved3 = 0x0;
|
|
scsi_id->reconnect_orb->reserved4 = 0x0;
|
|
|
|
scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
|
|
scsi_id->reconnect_orb->login_ID_misc |=
|
|
ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
|
|
|
|
/* Notify us when complete */
|
|
scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
|
|
|
|
scsi_id->reconnect_orb->reserved5 = 0x0;
|
|
scsi_id->reconnect_orb->status_fifo_hi =
|
|
ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
|
|
scsi_id->reconnect_orb->status_fifo_lo =
|
|
ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
|
|
|
|
/*
|
|
* Byte swap ORB if necessary
|
|
*/
|
|
sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb));
|
|
|
|
sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb),
|
|
"sbp2 reconnect orb", scsi_id->reconnect_orb_dma);
|
|
|
|
/*
|
|
* Initialize status fifo
|
|
*/
|
|
memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
|
|
|
|
/*
|
|
* Ok, let's write to the target's management agent register
|
|
*/
|
|
data[0] = ORB_SET_NODE_ID(hi->host->node_id);
|
|
data[1] = scsi_id->reconnect_orb_dma;
|
|
sbp2util_cpu_to_be32_buffer(data, 8);
|
|
|
|
atomic_set(&scsi_id->sbp2_login_complete, 0);
|
|
|
|
error = hpsb_node_write(scsi_id->ne,
|
|
scsi_id->sbp2_management_agent_addr, data, 8);
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* Wait for reconnect status (up to 1 second)...
|
|
*/
|
|
if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) {
|
|
SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
|
|
return -EIO;
|
|
}
|
|
|
|
/*
|
|
* Sanity. Make sure status returned matches reconnect orb.
|
|
*/
|
|
if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) {
|
|
SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
|
|
return -EIO;
|
|
}
|
|
|
|
/*
|
|
* Check status
|
|
*/
|
|
if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
|
|
STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
|
|
STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
|
|
|
|
SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed");
|
|
return -EIO;
|
|
}
|
|
|
|
HPSB_DEBUG("Reconnected to SBP-2 device");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
/*
|
|
* This function is called in order to set the busy timeout (number of
|
|
* retries to attempt) on the sbp2 device.
|
|
*/
|
|
static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id)
|
|
{
|
|
quadlet_t data;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
|
|
if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
|
|
SBP2_ERR("%s error", __FUNCTION__);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function is called to parse sbp2 device's config rom unit
|
|
* directory. Used to determine things like sbp2 management agent offset,
|
|
* and command set used (SCSI or RBC).
|
|
*/
|
|
static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
|
|
struct unit_directory *ud)
|
|
{
|
|
struct csr1212_keyval *kv;
|
|
struct csr1212_dentry *dentry;
|
|
u64 management_agent_addr;
|
|
u32 command_set_spec_id, command_set, unit_characteristics,
|
|
firmware_revision;
|
|
unsigned workarounds;
|
|
int i;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
management_agent_addr = 0x0;
|
|
command_set_spec_id = 0x0;
|
|
command_set = 0x0;
|
|
unit_characteristics = 0x0;
|
|
firmware_revision = 0x0;
|
|
|
|
/* Handle different fields in the unit directory, based on keys */
|
|
csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
|
|
switch (kv->key.id) {
|
|
case CSR1212_KV_ID_DEPENDENT_INFO:
|
|
if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) {
|
|
/* Save off the management agent address */
|
|
management_agent_addr =
|
|
CSR1212_REGISTER_SPACE_BASE +
|
|
(kv->value.csr_offset << 2);
|
|
|
|
SBP2_DEBUG("sbp2_management_agent_addr = %x",
|
|
(unsigned int)management_agent_addr);
|
|
} else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
|
|
scsi_id->sbp2_lun =
|
|
ORB_SET_LUN(kv->value.immediate);
|
|
}
|
|
break;
|
|
|
|
case SBP2_COMMAND_SET_SPEC_ID_KEY:
|
|
/* Command spec organization */
|
|
command_set_spec_id = kv->value.immediate;
|
|
SBP2_DEBUG("sbp2_command_set_spec_id = %x",
|
|
(unsigned int)command_set_spec_id);
|
|
break;
|
|
|
|
case SBP2_COMMAND_SET_KEY:
|
|
/* Command set used by sbp2 device */
|
|
command_set = kv->value.immediate;
|
|
SBP2_DEBUG("sbp2_command_set = %x",
|
|
(unsigned int)command_set);
|
|
break;
|
|
|
|
case SBP2_UNIT_CHARACTERISTICS_KEY:
|
|
/*
|
|
* Unit characterisitcs (orb related stuff
|
|
* that I'm not yet paying attention to)
|
|
*/
|
|
unit_characteristics = kv->value.immediate;
|
|
SBP2_DEBUG("sbp2_unit_characteristics = %x",
|
|
(unsigned int)unit_characteristics);
|
|
break;
|
|
|
|
case SBP2_FIRMWARE_REVISION_KEY:
|
|
/* Firmware revision */
|
|
firmware_revision = kv->value.immediate;
|
|
SBP2_DEBUG("sbp2_firmware_revision = %x",
|
|
(unsigned int)firmware_revision);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
workarounds = sbp2_default_workarounds;
|
|
if (force_inquiry_hack) {
|
|
SBP2_WARN("force_inquiry_hack is deprecated. "
|
|
"Use parameter 'workarounds' instead.");
|
|
workarounds |= SBP2_WORKAROUND_INQUIRY_36;
|
|
}
|
|
|
|
if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
|
|
for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
|
|
if (sbp2_workarounds_table[i].firmware_revision &&
|
|
sbp2_workarounds_table[i].firmware_revision !=
|
|
(firmware_revision & 0xffff00))
|
|
continue;
|
|
if (sbp2_workarounds_table[i].model_id &&
|
|
sbp2_workarounds_table[i].model_id != ud->model_id)
|
|
continue;
|
|
workarounds |= sbp2_workarounds_table[i].workarounds;
|
|
break;
|
|
}
|
|
|
|
if (workarounds)
|
|
SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
|
|
"(firmware_revision 0x%06x, vendor_id 0x%06x,"
|
|
" model_id 0x%06x)",
|
|
NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
|
|
workarounds, firmware_revision,
|
|
ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id,
|
|
ud->model_id);
|
|
|
|
/* We would need one SCSI host template for each target to adjust
|
|
* max_sectors on the fly, therefore warn only. */
|
|
if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
|
|
(max_sectors * 512) > (128 * 1024))
|
|
SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB "
|
|
"max transfer size. WARNING: Current max_sectors "
|
|
"setting is larger than 128KB (%d sectors)",
|
|
NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
|
|
max_sectors);
|
|
|
|
/* If this is a logical unit directory entry, process the parent
|
|
* to get the values. */
|
|
if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
|
|
struct unit_directory *parent_ud =
|
|
container_of(ud->device.parent, struct unit_directory, device);
|
|
sbp2_parse_unit_directory(scsi_id, parent_ud);
|
|
} else {
|
|
scsi_id->sbp2_management_agent_addr = management_agent_addr;
|
|
scsi_id->sbp2_command_set_spec_id = command_set_spec_id;
|
|
scsi_id->sbp2_command_set = command_set;
|
|
scsi_id->sbp2_unit_characteristics = unit_characteristics;
|
|
scsi_id->sbp2_firmware_revision = firmware_revision;
|
|
scsi_id->workarounds = workarounds;
|
|
if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
|
|
scsi_id->sbp2_lun = ORB_SET_LUN(ud->lun);
|
|
}
|
|
}
|
|
|
|
#define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
|
|
|
|
/*
|
|
* This function is called in order to determine the max speed and packet
|
|
* size we can use in our ORBs. Note, that we (the driver and host) only
|
|
* initiate the transaction. The SBP-2 device actually transfers the data
|
|
* (by reading from the DMA area we tell it). This means that the SBP-2
|
|
* device decides the actual maximum data it can transfer. We just tell it
|
|
* the speed that it needs to use, and the max_rec the host supports, and
|
|
* it takes care of the rest.
|
|
*/
|
|
static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id)
|
|
{
|
|
struct sbp2scsi_host_info *hi = scsi_id->hi;
|
|
u8 payload;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
scsi_id->speed_code =
|
|
hi->host->speed[NODEID_TO_NODE(scsi_id->ne->nodeid)];
|
|
|
|
/* Bump down our speed if the user requested it */
|
|
if (scsi_id->speed_code > max_speed) {
|
|
scsi_id->speed_code = max_speed;
|
|
SBP2_ERR("Forcing SBP-2 max speed down to %s",
|
|
hpsb_speedto_str[scsi_id->speed_code]);
|
|
}
|
|
|
|
/* Payload size is the lesser of what our speed supports and what
|
|
* our host supports. */
|
|
payload = min(sbp2_speedto_max_payload[scsi_id->speed_code],
|
|
(u8) (hi->host->csr.max_rec - 1));
|
|
|
|
/* If physical DMA is off, work around limitation in ohci1394:
|
|
* packet size must not exceed PAGE_SIZE */
|
|
if (scsi_id->ne->host->low_addr_space < (1ULL << 32))
|
|
while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE &&
|
|
payload)
|
|
payload--;
|
|
|
|
HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
|
|
NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid),
|
|
hpsb_speedto_str[scsi_id->speed_code],
|
|
SBP2_PAYLOAD_TO_BYTES(payload));
|
|
|
|
scsi_id->max_payload_size = payload;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function is called in order to perform a SBP-2 agent reset.
|
|
*/
|
|
static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait)
|
|
{
|
|
quadlet_t data;
|
|
u64 addr;
|
|
int retval;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
data = ntohl(SBP2_AGENT_RESET_DATA);
|
|
addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
|
|
|
|
if (wait)
|
|
retval = hpsb_node_write(scsi_id->ne, addr, &data, 4);
|
|
else
|
|
retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4);
|
|
|
|
if (retval < 0) {
|
|
SBP2_ERR("hpsb_node_write failed.\n");
|
|
return -EIO;
|
|
}
|
|
|
|
/*
|
|
* Need to make sure orb pointer is written on next command
|
|
*/
|
|
scsi_id->last_orb = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
|
|
struct sbp2scsi_host_info *hi,
|
|
struct sbp2_command_info *command,
|
|
unsigned int scsi_use_sg,
|
|
struct scatterlist *sgpnt,
|
|
u32 orb_direction,
|
|
enum dma_data_direction dma_dir)
|
|
{
|
|
command->dma_dir = dma_dir;
|
|
orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
|
|
orb->misc |= ORB_SET_DIRECTION(orb_direction);
|
|
|
|
/* Special case if only one element (and less than 64KB in size) */
|
|
if ((scsi_use_sg == 1) &&
|
|
(sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
|
|
|
|
SBP2_DEBUG("Only one s/g element");
|
|
command->dma_size = sgpnt[0].length;
|
|
command->dma_type = CMD_DMA_PAGE;
|
|
command->cmd_dma = pci_map_page(hi->host->pdev,
|
|
sgpnt[0].page,
|
|
sgpnt[0].offset,
|
|
command->dma_size,
|
|
command->dma_dir);
|
|
SBP2_DMA_ALLOC("single page scatter element");
|
|
|
|
orb->data_descriptor_lo = command->cmd_dma;
|
|
orb->misc |= ORB_SET_DATA_SIZE(command->dma_size);
|
|
|
|
} else {
|
|
struct sbp2_unrestricted_page_table *sg_element =
|
|
&command->scatter_gather_element[0];
|
|
u32 sg_count, sg_len;
|
|
dma_addr_t sg_addr;
|
|
int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg,
|
|
dma_dir);
|
|
|
|
SBP2_DMA_ALLOC("scatter list");
|
|
|
|
command->dma_size = scsi_use_sg;
|
|
command->sge_buffer = sgpnt;
|
|
|
|
/* use page tables (s/g) */
|
|
orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
|
|
orb->data_descriptor_lo = command->sge_dma;
|
|
|
|
/*
|
|
* Loop through and fill out our sbp-2 page tables
|
|
* (and split up anything too large)
|
|
*/
|
|
for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
|
|
sg_len = sg_dma_len(sgpnt);
|
|
sg_addr = sg_dma_address(sgpnt);
|
|
while (sg_len) {
|
|
sg_element[sg_count].segment_base_lo = sg_addr;
|
|
if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
|
|
sg_element[sg_count].length_segment_base_hi =
|
|
PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
|
|
sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
|
|
sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
|
|
} else {
|
|
sg_element[sg_count].length_segment_base_hi =
|
|
PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
|
|
sg_len = 0;
|
|
}
|
|
sg_count++;
|
|
}
|
|
}
|
|
|
|
/* Number of page table (s/g) elements */
|
|
orb->misc |= ORB_SET_DATA_SIZE(sg_count);
|
|
|
|
sbp2util_packet_dump(sg_element,
|
|
(sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
|
|
"sbp2 s/g list", command->sge_dma);
|
|
|
|
/* Byte swap page tables if necessary */
|
|
sbp2util_cpu_to_be32_buffer(sg_element,
|
|
(sizeof(struct sbp2_unrestricted_page_table)) *
|
|
sg_count);
|
|
}
|
|
}
|
|
|
|
static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb,
|
|
struct sbp2scsi_host_info *hi,
|
|
struct sbp2_command_info *command,
|
|
struct scatterlist *sgpnt,
|
|
u32 orb_direction,
|
|
unsigned int scsi_request_bufflen,
|
|
void *scsi_request_buffer,
|
|
enum dma_data_direction dma_dir)
|
|
{
|
|
command->dma_dir = dma_dir;
|
|
command->dma_size = scsi_request_bufflen;
|
|
command->dma_type = CMD_DMA_SINGLE;
|
|
command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer,
|
|
command->dma_size, command->dma_dir);
|
|
orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
|
|
orb->misc |= ORB_SET_DIRECTION(orb_direction);
|
|
|
|
SBP2_DMA_ALLOC("single bulk");
|
|
|
|
/*
|
|
* Handle case where we get a command w/o s/g enabled (but
|
|
* check for transfers larger than 64K)
|
|
*/
|
|
if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
|
|
|
|
orb->data_descriptor_lo = command->cmd_dma;
|
|
orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
|
|
|
|
} else {
|
|
struct sbp2_unrestricted_page_table *sg_element =
|
|
&command->scatter_gather_element[0];
|
|
u32 sg_count, sg_len;
|
|
dma_addr_t sg_addr;
|
|
|
|
/*
|
|
* Need to turn this into page tables, since the
|
|
* buffer is too large.
|
|
*/
|
|
orb->data_descriptor_lo = command->sge_dma;
|
|
|
|
/* Use page tables (s/g) */
|
|
orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
|
|
|
|
/*
|
|
* fill out our sbp-2 page tables (and split up
|
|
* the large buffer)
|
|
*/
|
|
sg_count = 0;
|
|
sg_len = scsi_request_bufflen;
|
|
sg_addr = command->cmd_dma;
|
|
while (sg_len) {
|
|
sg_element[sg_count].segment_base_lo = sg_addr;
|
|
if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
|
|
sg_element[sg_count].length_segment_base_hi =
|
|
PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
|
|
sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
|
|
sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
|
|
} else {
|
|
sg_element[sg_count].length_segment_base_hi =
|
|
PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
|
|
sg_len = 0;
|
|
}
|
|
sg_count++;
|
|
}
|
|
|
|
/* Number of page table (s/g) elements */
|
|
orb->misc |= ORB_SET_DATA_SIZE(sg_count);
|
|
|
|
sbp2util_packet_dump(sg_element,
|
|
(sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
|
|
"sbp2 s/g list", command->sge_dma);
|
|
|
|
/* Byte swap page tables if necessary */
|
|
sbp2util_cpu_to_be32_buffer(sg_element,
|
|
(sizeof(struct sbp2_unrestricted_page_table)) *
|
|
sg_count);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This function is called to create the actual command orb and s/g list
|
|
* out of the scsi command itself.
|
|
*/
|
|
static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id,
|
|
struct sbp2_command_info *command,
|
|
unchar *scsi_cmd,
|
|
unsigned int scsi_use_sg,
|
|
unsigned int scsi_request_bufflen,
|
|
void *scsi_request_buffer,
|
|
enum dma_data_direction dma_dir)
|
|
{
|
|
struct sbp2scsi_host_info *hi = scsi_id->hi;
|
|
struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer;
|
|
struct sbp2_command_orb *command_orb = &command->command_orb;
|
|
u32 orb_direction;
|
|
|
|
/*
|
|
* Set-up our command ORB..
|
|
*
|
|
* NOTE: We're doing unrestricted page tables (s/g), as this is
|
|
* best performance (at least with the devices I have). This means
|
|
* that data_size becomes the number of s/g elements, and
|
|
* page_size should be zero (for unrestricted).
|
|
*/
|
|
command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
|
|
command_orb->next_ORB_lo = 0x0;
|
|
command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size);
|
|
command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code);
|
|
command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */
|
|
|
|
if (dma_dir == DMA_NONE)
|
|
orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
|
|
else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
|
|
orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
|
|
else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
|
|
orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
|
|
else {
|
|
SBP2_WARN("Falling back to DMA_NONE");
|
|
orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
|
|
}
|
|
|
|
/* Set-up our pagetable stuff */
|
|
if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
|
|
SBP2_DEBUG("No data transfer");
|
|
command_orb->data_descriptor_hi = 0x0;
|
|
command_orb->data_descriptor_lo = 0x0;
|
|
command_orb->misc |= ORB_SET_DIRECTION(1);
|
|
} else if (scsi_use_sg) {
|
|
SBP2_DEBUG("Use scatter/gather");
|
|
sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg,
|
|
sgpnt, orb_direction, dma_dir);
|
|
} else {
|
|
SBP2_DEBUG("No scatter/gather");
|
|
sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt,
|
|
orb_direction, scsi_request_bufflen,
|
|
scsi_request_buffer, dma_dir);
|
|
}
|
|
|
|
/* Byte swap command ORB if necessary */
|
|
sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb));
|
|
|
|
/* Put our scsi command in the command ORB */
|
|
memset(command_orb->cdb, 0, 12);
|
|
memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
|
|
}
|
|
|
|
/*
|
|
* This function is called in order to begin a regular SBP-2 command.
|
|
*/
|
|
static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id,
|
|
struct sbp2_command_info *command)
|
|
{
|
|
struct sbp2scsi_host_info *hi = scsi_id->hi;
|
|
struct sbp2_command_orb *command_orb = &command->command_orb;
|
|
struct node_entry *ne = scsi_id->ne;
|
|
u64 addr;
|
|
|
|
outstanding_orb_incr;
|
|
SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
|
|
command_orb, global_outstanding_command_orbs);
|
|
|
|
pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma,
|
|
sizeof(struct sbp2_command_orb),
|
|
PCI_DMA_BIDIRECTIONAL);
|
|
pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma,
|
|
sizeof(command->scatter_gather_element),
|
|
PCI_DMA_BIDIRECTIONAL);
|
|
/*
|
|
* Check to see if there are any previous orbs to use
|
|
*/
|
|
if (scsi_id->last_orb == NULL) {
|
|
quadlet_t data[2];
|
|
|
|
/*
|
|
* Ok, let's write to the target's management agent register
|
|
*/
|
|
addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET;
|
|
data[0] = ORB_SET_NODE_ID(hi->host->node_id);
|
|
data[1] = command->command_orb_dma;
|
|
sbp2util_cpu_to_be32_buffer(data, 8);
|
|
|
|
SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb);
|
|
|
|
if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) {
|
|
SBP2_ERR("sbp2util_node_write_no_wait failed.\n");
|
|
return -EIO;
|
|
}
|
|
|
|
SBP2_ORB_DEBUG("write command agent complete");
|
|
|
|
scsi_id->last_orb = command_orb;
|
|
scsi_id->last_orb_dma = command->command_orb_dma;
|
|
|
|
} else {
|
|
quadlet_t data;
|
|
|
|
/*
|
|
* We have an orb already sent (maybe or maybe not
|
|
* processed) that we can append this orb to. So do so,
|
|
* and ring the doorbell. Have to be very careful
|
|
* modifying these next orb pointers, as they are accessed
|
|
* both by the sbp2 device and us.
|
|
*/
|
|
scsi_id->last_orb->next_ORB_lo =
|
|
cpu_to_be32(command->command_orb_dma);
|
|
/* Tells hardware that this pointer is valid */
|
|
scsi_id->last_orb->next_ORB_hi = 0x0;
|
|
pci_dma_sync_single_for_device(hi->host->pdev,
|
|
scsi_id->last_orb_dma,
|
|
sizeof(struct sbp2_command_orb),
|
|
PCI_DMA_BIDIRECTIONAL);
|
|
|
|
/*
|
|
* Ring the doorbell
|
|
*/
|
|
data = cpu_to_be32(command->command_orb_dma);
|
|
addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET;
|
|
|
|
SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb);
|
|
|
|
if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) {
|
|
SBP2_ERR("sbp2util_node_write_no_wait failed");
|
|
return -EIO;
|
|
}
|
|
|
|
scsi_id->last_orb = command_orb;
|
|
scsi_id->last_orb_dma = command->command_orb_dma;
|
|
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function is called in order to begin a regular SBP-2 command.
|
|
*/
|
|
static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
|
|
struct scsi_cmnd *SCpnt,
|
|
void (*done)(struct scsi_cmnd *))
|
|
{
|
|
unchar *cmd = (unchar *) SCpnt->cmnd;
|
|
unsigned int request_bufflen = SCpnt->request_bufflen;
|
|
struct sbp2_command_info *command;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
SBP2_DEBUG("SCSI transfer size = %x", request_bufflen);
|
|
SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg);
|
|
|
|
/*
|
|
* Allocate a command orb and s/g structure
|
|
*/
|
|
command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done);
|
|
if (!command) {
|
|
return -EIO;
|
|
}
|
|
|
|
/*
|
|
* Now actually fill in the comamnd orb and sbp2 s/g list
|
|
*/
|
|
sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg,
|
|
request_bufflen, SCpnt->request_buffer,
|
|
SCpnt->sc_data_direction);
|
|
|
|
sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb),
|
|
"sbp2 command orb", command->command_orb_dma);
|
|
|
|
/*
|
|
* Initialize status fifo
|
|
*/
|
|
memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
|
|
|
|
/*
|
|
* Link up the orb, and ring the doorbell if needed
|
|
*/
|
|
sbp2_link_orb_command(scsi_id, command);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Translates SBP-2 status into SCSI sense data for check conditions
|
|
*/
|
|
static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data)
|
|
{
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
/*
|
|
* Ok, it's pretty ugly... ;-)
|
|
*/
|
|
sense_data[0] = 0x70;
|
|
sense_data[1] = 0x0;
|
|
sense_data[2] = sbp2_status[9];
|
|
sense_data[3] = sbp2_status[12];
|
|
sense_data[4] = sbp2_status[13];
|
|
sense_data[5] = sbp2_status[14];
|
|
sense_data[6] = sbp2_status[15];
|
|
sense_data[7] = 10;
|
|
sense_data[8] = sbp2_status[16];
|
|
sense_data[9] = sbp2_status[17];
|
|
sense_data[10] = sbp2_status[18];
|
|
sense_data[11] = sbp2_status[19];
|
|
sense_data[12] = sbp2_status[10];
|
|
sense_data[13] = sbp2_status[11];
|
|
sense_data[14] = sbp2_status[20];
|
|
sense_data[15] = sbp2_status[21];
|
|
|
|
return sbp2_status[8] & 0x3f; /* return scsi status */
|
|
}
|
|
|
|
/*
|
|
* This function deals with status writes from the SBP-2 device
|
|
*/
|
|
static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid,
|
|
quadlet_t *data, u64 addr, size_t length, u16 fl)
|
|
{
|
|
struct sbp2scsi_host_info *hi;
|
|
struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp;
|
|
struct scsi_cmnd *SCpnt = NULL;
|
|
u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
|
|
struct sbp2_command_info *command;
|
|
unsigned long flags;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr);
|
|
|
|
if (!host) {
|
|
SBP2_ERR("host is NULL - this is bad!");
|
|
return RCODE_ADDRESS_ERROR;
|
|
}
|
|
|
|
hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
|
|
|
|
if (!hi) {
|
|
SBP2_ERR("host info is NULL - this is bad!");
|
|
return RCODE_ADDRESS_ERROR;
|
|
}
|
|
|
|
/*
|
|
* Find our scsi_id structure by looking at the status fifo address
|
|
* written to by the sbp2 device.
|
|
*/
|
|
list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) {
|
|
if (scsi_id_tmp->ne->nodeid == nodeid &&
|
|
scsi_id_tmp->status_fifo_addr == addr) {
|
|
scsi_id = scsi_id_tmp;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!scsi_id) {
|
|
SBP2_ERR("scsi_id is NULL - device is gone?");
|
|
return RCODE_ADDRESS_ERROR;
|
|
}
|
|
|
|
/*
|
|
* Put response into scsi_id status fifo...
|
|
*/
|
|
memcpy(&scsi_id->status_block, data, length);
|
|
|
|
/*
|
|
* Byte swap first two quadlets (8 bytes) of status for processing
|
|
*/
|
|
sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8);
|
|
|
|
/*
|
|
* Handle command ORB status here if necessary. First, need to match status with command.
|
|
*/
|
|
command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo);
|
|
if (command) {
|
|
|
|
SBP2_DEBUG("Found status for command ORB");
|
|
pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
|
|
sizeof(struct sbp2_command_orb),
|
|
PCI_DMA_BIDIRECTIONAL);
|
|
pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
|
|
sizeof(command->scatter_gather_element),
|
|
PCI_DMA_BIDIRECTIONAL);
|
|
|
|
SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb);
|
|
outstanding_orb_decr;
|
|
|
|
/*
|
|
* Matched status with command, now grab scsi command pointers and check status
|
|
*/
|
|
SCpnt = command->Current_SCpnt;
|
|
spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
|
|
sbp2util_mark_command_completed(scsi_id, command);
|
|
spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
|
|
|
|
if (SCpnt) {
|
|
|
|
/*
|
|
* See if the target stored any scsi status information
|
|
*/
|
|
if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) {
|
|
/*
|
|
* Translate SBP-2 status to SCSI sense data
|
|
*/
|
|
SBP2_DEBUG("CHECK CONDITION");
|
|
scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer);
|
|
}
|
|
|
|
/*
|
|
* Check to see if the dead bit is set. If so, we'll have to initiate
|
|
* a fetch agent reset.
|
|
*/
|
|
if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) {
|
|
|
|
/*
|
|
* Initiate a fetch agent reset.
|
|
*/
|
|
SBP2_DEBUG("Dead bit set - initiating fetch agent reset");
|
|
sbp2_agent_reset(scsi_id, 0);
|
|
}
|
|
|
|
SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb);
|
|
}
|
|
|
|
/*
|
|
* Check here to see if there are no commands in-use. If there are none, we can
|
|
* null out last orb so that next time around we write directly to the orb pointer...
|
|
* Quick start saves one 1394 bus transaction.
|
|
*/
|
|
spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
|
|
if (list_empty(&scsi_id->sbp2_command_orb_inuse)) {
|
|
scsi_id->last_orb = NULL;
|
|
}
|
|
spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
|
|
|
|
} else {
|
|
|
|
/*
|
|
* It's probably a login/logout/reconnect status.
|
|
*/
|
|
if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
|
|
(scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
|
|
(scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
|
|
(scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) {
|
|
atomic_set(&scsi_id->sbp2_login_complete, 1);
|
|
}
|
|
}
|
|
|
|
if (SCpnt) {
|
|
|
|
/* Complete the SCSI command. */
|
|
SBP2_DEBUG("Completing SCSI command");
|
|
sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt,
|
|
command->Current_done);
|
|
SBP2_ORB_DEBUG("command orb completed");
|
|
}
|
|
|
|
return RCODE_COMPLETE;
|
|
}
|
|
|
|
/**************************************
|
|
* SCSI interface related section
|
|
**************************************/
|
|
|
|
/*
|
|
* This routine is the main request entry routine for doing I/O. It is
|
|
* called from the scsi stack directly.
|
|
*/
|
|
static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
|
|
void (*done)(struct scsi_cmnd *))
|
|
{
|
|
struct scsi_id_instance_data *scsi_id =
|
|
(struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
|
|
struct sbp2scsi_host_info *hi;
|
|
int result = DID_NO_CONNECT << 16;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
#if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
|
|
scsi_print_command(SCpnt);
|
|
#endif
|
|
|
|
if (!sbp2util_node_is_available(scsi_id))
|
|
goto done;
|
|
|
|
hi = scsi_id->hi;
|
|
|
|
if (!hi) {
|
|
SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Until we handle multiple luns, just return selection time-out
|
|
* to any IO directed at non-zero LUNs
|
|
*/
|
|
if (SCpnt->device->lun)
|
|
goto done;
|
|
|
|
/*
|
|
* Check for request sense command, and handle it here
|
|
* (autorequest sense)
|
|
*/
|
|
if (SCpnt->cmnd[0] == REQUEST_SENSE) {
|
|
SBP2_DEBUG("REQUEST_SENSE");
|
|
memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen);
|
|
memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
|
|
sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Check to see if we are in the middle of a bus reset.
|
|
*/
|
|
if (!hpsb_node_entry_valid(scsi_id->ne)) {
|
|
SBP2_ERR("Bus reset in progress - rejecting command");
|
|
result = DID_BUS_BUSY << 16;
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Bidirectional commands are not yet implemented,
|
|
* and unknown transfer direction not handled.
|
|
*/
|
|
if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) {
|
|
SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
|
|
result = DID_ERROR << 16;
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Try and send our SCSI command
|
|
*/
|
|
if (sbp2_send_command(scsi_id, SCpnt, done)) {
|
|
SBP2_ERR("Error sending SCSI command");
|
|
sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
|
|
SCpnt, done);
|
|
}
|
|
return 0;
|
|
|
|
done:
|
|
SCpnt->result = result;
|
|
done(SCpnt);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function is called in order to complete all outstanding SBP-2
|
|
* commands (in case of resets, etc.).
|
|
*/
|
|
static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
|
|
u32 status)
|
|
{
|
|
struct sbp2scsi_host_info *hi = scsi_id->hi;
|
|
struct list_head *lh;
|
|
struct sbp2_command_info *command;
|
|
unsigned long flags;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
|
|
while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
|
|
SBP2_DEBUG("Found pending command to complete");
|
|
lh = scsi_id->sbp2_command_orb_inuse.next;
|
|
command = list_entry(lh, struct sbp2_command_info, list);
|
|
pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
|
|
sizeof(struct sbp2_command_orb),
|
|
PCI_DMA_BIDIRECTIONAL);
|
|
pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
|
|
sizeof(command->scatter_gather_element),
|
|
PCI_DMA_BIDIRECTIONAL);
|
|
sbp2util_mark_command_completed(scsi_id, command);
|
|
if (command->Current_SCpnt) {
|
|
command->Current_SCpnt->result = status << 16;
|
|
command->Current_done(command->Current_SCpnt);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* This function is called in order to complete a regular SBP-2 command.
|
|
*
|
|
* This can be called in interrupt context.
|
|
*/
|
|
static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
|
|
u32 scsi_status, struct scsi_cmnd *SCpnt,
|
|
void (*done)(struct scsi_cmnd *))
|
|
{
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
/*
|
|
* Sanity
|
|
*/
|
|
if (!SCpnt) {
|
|
SBP2_ERR("SCpnt is NULL");
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* If a bus reset is in progress and there was an error, don't
|
|
* complete the command, just let it get retried at the end of the
|
|
* bus reset.
|
|
*/
|
|
if (!hpsb_node_entry_valid(scsi_id->ne)
|
|
&& (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
|
|
SBP2_ERR("Bus reset in progress - retry command later");
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Switch on scsi status
|
|
*/
|
|
switch (scsi_status) {
|
|
case SBP2_SCSI_STATUS_GOOD:
|
|
SCpnt->result = DID_OK << 16;
|
|
break;
|
|
|
|
case SBP2_SCSI_STATUS_BUSY:
|
|
SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
|
|
SCpnt->result = DID_BUS_BUSY << 16;
|
|
break;
|
|
|
|
case SBP2_SCSI_STATUS_CHECK_CONDITION:
|
|
SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
|
|
SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
|
|
#if CONFIG_IEEE1394_SBP2_DEBUG >= 1
|
|
scsi_print_command(SCpnt);
|
|
scsi_print_sense(SBP2_DEVICE_NAME, SCpnt);
|
|
#endif
|
|
break;
|
|
|
|
case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
|
|
SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
|
|
SCpnt->result = DID_NO_CONNECT << 16;
|
|
scsi_print_command(SCpnt);
|
|
break;
|
|
|
|
case SBP2_SCSI_STATUS_CONDITION_MET:
|
|
case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
|
|
case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
|
|
SBP2_ERR("Bad SCSI status = %x", scsi_status);
|
|
SCpnt->result = DID_ERROR << 16;
|
|
scsi_print_command(SCpnt);
|
|
break;
|
|
|
|
default:
|
|
SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
|
|
SCpnt->result = DID_ERROR << 16;
|
|
}
|
|
|
|
/*
|
|
* If a bus reset is in progress and there was an error, complete
|
|
* the command as busy so that it will get retried.
|
|
*/
|
|
if (!hpsb_node_entry_valid(scsi_id->ne)
|
|
&& (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
|
|
SBP2_ERR("Completing command with busy (bus reset)");
|
|
SCpnt->result = DID_BUS_BUSY << 16;
|
|
}
|
|
|
|
/*
|
|
* If a unit attention occurs, return busy status so it gets
|
|
* retried... it could have happened because of a 1394 bus reset
|
|
* or hot-plug...
|
|
* XXX DID_BUS_BUSY is actually a bad idea because it will defy
|
|
* the scsi layer's retry logic.
|
|
*/
|
|
#if 0
|
|
if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) &&
|
|
(SCpnt->sense_buffer[2] == UNIT_ATTENTION)) {
|
|
SBP2_DEBUG("UNIT ATTENTION - return busy");
|
|
SCpnt->result = DID_BUS_BUSY << 16;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Tell scsi stack that we're done with this command
|
|
*/
|
|
done(SCpnt);
|
|
}
|
|
|
|
static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
|
|
{
|
|
struct scsi_id_instance_data *scsi_id =
|
|
(struct scsi_id_instance_data *)sdev->host->hostdata[0];
|
|
|
|
scsi_id->sdev = sdev;
|
|
|
|
if (scsi_id->workarounds & SBP2_WORKAROUND_INQUIRY_36)
|
|
sdev->inquiry_len = 36;
|
|
return 0;
|
|
}
|
|
|
|
static int sbp2scsi_slave_configure(struct scsi_device *sdev)
|
|
{
|
|
struct scsi_id_instance_data *scsi_id =
|
|
(struct scsi_id_instance_data *)sdev->host->hostdata[0];
|
|
|
|
blk_queue_dma_alignment(sdev->request_queue, (512 - 1));
|
|
sdev->use_10_for_rw = 1;
|
|
sdev->use_10_for_ms = 1;
|
|
|
|
if (sdev->type == TYPE_DISK &&
|
|
scsi_id->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
|
|
sdev->skip_ms_page_8 = 1;
|
|
if (scsi_id->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
|
|
sdev->fix_capacity = 1;
|
|
return 0;
|
|
}
|
|
|
|
static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
|
|
{
|
|
((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Called by scsi stack when something has really gone wrong. Usually
|
|
* called when a command has timed-out for some reason.
|
|
*/
|
|
static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
|
|
{
|
|
struct scsi_id_instance_data *scsi_id =
|
|
(struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
|
|
struct sbp2scsi_host_info *hi = scsi_id->hi;
|
|
struct sbp2_command_info *command;
|
|
unsigned long flags;
|
|
|
|
SBP2_ERR("aborting sbp2 command");
|
|
scsi_print_command(SCpnt);
|
|
|
|
if (sbp2util_node_is_available(scsi_id)) {
|
|
|
|
/*
|
|
* Right now, just return any matching command structures
|
|
* to the free pool.
|
|
*/
|
|
spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
|
|
command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt);
|
|
if (command) {
|
|
SBP2_DEBUG("Found command to abort");
|
|
pci_dma_sync_single_for_cpu(hi->host->pdev,
|
|
command->command_orb_dma,
|
|
sizeof(struct sbp2_command_orb),
|
|
PCI_DMA_BIDIRECTIONAL);
|
|
pci_dma_sync_single_for_cpu(hi->host->pdev,
|
|
command->sge_dma,
|
|
sizeof(command->scatter_gather_element),
|
|
PCI_DMA_BIDIRECTIONAL);
|
|
sbp2util_mark_command_completed(scsi_id, command);
|
|
if (command->Current_SCpnt) {
|
|
command->Current_SCpnt->result = DID_ABORT << 16;
|
|
command->Current_done(command->Current_SCpnt);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
|
|
|
|
/*
|
|
* Initiate a fetch agent reset.
|
|
*/
|
|
sbp2_agent_reset(scsi_id, 0);
|
|
sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
|
|
}
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* Called by scsi stack when something has really gone wrong.
|
|
*/
|
|
static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
|
|
{
|
|
struct scsi_id_instance_data *scsi_id =
|
|
(struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
|
|
|
|
SBP2_ERR("reset requested");
|
|
|
|
if (sbp2util_node_is_available(scsi_id)) {
|
|
SBP2_ERR("Generating sbp2 fetch agent reset");
|
|
sbp2_agent_reset(scsi_id, 0);
|
|
}
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct scsi_device *sdev;
|
|
struct scsi_id_instance_data *scsi_id;
|
|
int lun;
|
|
|
|
if (!(sdev = to_scsi_device(dev)))
|
|
return 0;
|
|
|
|
if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0]))
|
|
return 0;
|
|
|
|
lun = ORB_SET_LUN(scsi_id->sbp2_lun);
|
|
|
|
return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid,
|
|
scsi_id->ud->id, lun);
|
|
}
|
|
static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
|
|
|
|
static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
|
|
&dev_attr_ieee1394_id,
|
|
NULL
|
|
};
|
|
|
|
MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
|
|
MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
|
|
MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/* SCSI host template */
|
|
static struct scsi_host_template scsi_driver_template = {
|
|
.module = THIS_MODULE,
|
|
.name = "SBP-2 IEEE-1394",
|
|
.proc_name = SBP2_DEVICE_NAME,
|
|
.queuecommand = sbp2scsi_queuecommand,
|
|
.eh_abort_handler = sbp2scsi_abort,
|
|
.eh_device_reset_handler = sbp2scsi_reset,
|
|
.slave_alloc = sbp2scsi_slave_alloc,
|
|
.slave_configure = sbp2scsi_slave_configure,
|
|
.slave_destroy = sbp2scsi_slave_destroy,
|
|
.this_id = -1,
|
|
.sg_tablesize = SG_ALL,
|
|
.use_clustering = ENABLE_CLUSTERING,
|
|
.cmd_per_lun = SBP2_MAX_CMDS,
|
|
.can_queue = SBP2_MAX_CMDS,
|
|
.emulated = 1,
|
|
.sdev_attrs = sbp2_sysfs_sdev_attrs,
|
|
};
|
|
|
|
static int sbp2_module_init(void)
|
|
{
|
|
int ret;
|
|
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
/* Module load debug option to force one command at a time (serializing I/O) */
|
|
if (serialize_io) {
|
|
SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)");
|
|
SBP2_INFO("Try serialize_io=0 for better performance");
|
|
scsi_driver_template.can_queue = 1;
|
|
scsi_driver_template.cmd_per_lun = 1;
|
|
}
|
|
|
|
if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
|
|
(max_sectors * 512) > (128 * 1024))
|
|
max_sectors = 128 * 1024 / 512;
|
|
scsi_driver_template.max_sectors = max_sectors;
|
|
|
|
/* Register our high level driver with 1394 stack */
|
|
hpsb_register_highlevel(&sbp2_highlevel);
|
|
|
|
ret = hpsb_register_protocol(&sbp2_driver);
|
|
if (ret) {
|
|
SBP2_ERR("Failed to register protocol");
|
|
hpsb_unregister_highlevel(&sbp2_highlevel);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit sbp2_module_exit(void)
|
|
{
|
|
SBP2_DEBUG_ENTER();
|
|
|
|
hpsb_unregister_protocol(&sbp2_driver);
|
|
|
|
hpsb_unregister_highlevel(&sbp2_highlevel);
|
|
}
|
|
|
|
module_init(sbp2_module_init);
|
|
module_exit(sbp2_module_exit);
|