/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* For the avoidance of doubt the "preferred form" of this code is one which
* is in an open non patent encumbered format. Where cryptographic key signing
* forms part of the process of creating an executable the information
* including keys needed to generate an equivalently functional executable
* are deemed to be part of the source code.
*
* Complications for I2O scsi
*
* o Each (bus,lun) is a logical device in I2O. We keep a map
* table. We spoof failed selection for unmapped units
* o Request sense buffers can come back for free.
* o Scatter gather is a bit dynamic. We have to investigate at
* setup time.
* o Some of our resources are dynamically shared. The i2o core
* needs a message reservation protocol to avoid swap v net
* deadlocking. We need to back off queue requests.
*
* In general the firmware wants to help. Where its help isn't performance
* useful we just ignore the aid. Its not worth the code in truth.
*
* Fixes/additions:
* Steve Ralston:
* Scatter gather now works
* Markus Lidel <Markus.Lidel@shadowconnect.com>:
* Minor fixes for 2.6.
*
* To Do:
* 64bit cleanups
* Fix the resource management problems.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/jiffies.h>
#include <linux/interrupt.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/prefetch.h>
#include <linux/pci.h>
#include <linux/blkdev.h>
#include <linux/i2o.h>
#include <linux/scatterlist.h>
#include <asm/dma.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/atomic.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_request.h>
#include <scsi/sg.h>
#include <scsi/sg_request.h>
#define OSM_NAME "scsi-osm"
#define OSM_VERSION "1.282"
#define OSM_DESCRIPTION "I2O SCSI Peripheral OSM"
static struct i2o_driver i2o_scsi_driver;
static unsigned int i2o_scsi_max_id = 16;
static unsigned int i2o_scsi_max_lun = 255;
struct i2o_scsi_host {
struct Scsi_Host *scsi_host; /* pointer to the SCSI host */
struct i2o_controller *iop; /* pointer to the I2O controller */
unsigned int lun; /* lun's used for block devices */
struct i2o_device *channel[0]; /* channel->i2o_dev mapping table */
};
static struct scsi_host_template i2o_scsi_host_template;
#define I2O_SCSI_CAN_QUEUE 4
/* SCSI OSM class handling definition */
static struct i2o_class_id i2o_scsi_class_id[] = {
{I2O_CLASS_SCSI_PERIPHERAL},
{I2O_CLASS_END}
};
static struct i2o_scsi_host *i2o_scsi_host_alloc(struct i2o_controller *c)
{
struct i2o_scsi_host *i2o_shost;
struct i2o_device *i2o_dev;
struct Scsi_Host *scsi_host;
int max_channel = 0;
u8 type;
int i;
size_t size;
u16 body_size = 6;
#ifdef CONFIG_I2O_EXT_ADAPTEC
if (c->adaptec)
body_size = 8;
#endif
list_for_each_entry(i2o_dev, &c->devices, list)
if (i2o_dev->lct_data.class_id == I2O_CLASS_BUS_ADAPTER) {
if (i2o_parm_field_get(i2o_dev, 0x0000, 0, &type, 1)
&& (type == 0x01)) /* SCSI bus */
max_channel++;
}
if (!max_channel) {
osm_warn("no channels found on %s\n", c->name);
return ERR_PTR(-EFAULT);
}
size = max_channel * sizeof(struct i2o_device *)
+ sizeof(struct i2o_scsi_host);
scsi_host = scsi_host_alloc(&i2o_scsi_host_template, size);
if (!scsi_host) {
osm_warn("Could not allocate SCSI host\n");
return ERR_PTR(-ENOMEM);
}
scsi_host->max_channel = max_channel - 1;
scsi_host->max_id = i2o_scsi_max_id;
scsi_host->max_lun = i2o_scsi_max_lun;
scsi_host->this_id = c->unit;
scsi_host->sg_tablesize = i2o_sg_tablesize(c, body_size);
i2o_shost = (struct i2o_scsi_host *)scsi_host->hostdata;
i2o_shost->scsi_host = scsi_host;
i2o_shost->iop = c;
i2o_shost->lun = 1;
i = 0;
list_for_each_entry(i2o_dev, &c->devices, list)
if (i2o_dev->lct_data.class_id == I2O_CLASS_BUS_ADAPTER) {
if (i2o_parm_field_get(i2o_dev, 0x0000, 0, &type, 1)
&& (type == 0x01)) /* only SCSI bus */
i2o_shost->channel[i++] = i2o_dev;
if (i >= max_channel)
break;
}
return i2o_shost;
};
/**
* i2o_scsi_get_host - Get an I2O SCSI host
* @c: I2O controller to for which to get the SCSI host
*
* If the I2O controller already exists as SCSI host, the SCSI host
* is returned, otherwise the I2O controller is added to the SCSI
* core.
*
* Returns pointer to the I2O SCSI host on success or NULL on failure.
*/
static struct i2o_scsi_host *i2o_scsi_get_host(struct i2o_controller *c)
{
return c->driver_data[i2o_scsi_driver.context];
};
/**
* i2o_scsi_remove - Remove I2O device from SCSI core
* @dev: device which should be removed
*
* Removes the I2O device from the SCSI core again.
*
* Returns 0 on success.
*/
static int i2o_scsi_remove(struct device *dev)
{
struct i2o_device *i2o_dev = to_i2o_device(dev);
struct i2o_controller *c = i2o_dev->iop;
struct i2o_scsi_host *i2o_shost;
struct scsi_device *scsi_dev;
osm_info("device removed (TID: %03x)\n", i2o_dev->lct_data.tid);
i2o_shost = i2o_scsi_get_host(c);
shost_for_each_device(scsi_dev, i2o_shost->scsi_host)
if (scsi_dev->hostdata == i2o_dev) {
sysfs_remove_link(&i2o_dev->device.kobj, "scsi");
scsi_remove_device(scsi_dev);
scsi_device_put(scsi_dev);
break;
}
return 0;
};
/**
* i2o_scsi_probe - verify if dev is a I2O SCSI device and install it
* @dev: device to verify if it is a I2O SCSI device
*
* Retrieve channel, id and lun for I2O device. If everthing goes well
* register the I2O device as SCSI device on the I2O SCSI controller.
*
* Returns 0 on success or negative error code on failure.
*/
static int i2o_scsi_probe(struct device *dev)
{
struct i2o_device *i2o_dev = to_i2o_device(dev);
struct i2o_controller *c = i2o_dev->iop;
struct i2o_scsi_host *i2o_shost;
struct Scsi_Host *scsi_host;
struct i2o_device *parent;
struct scsi_device *scsi_dev;
u32 id = -1;
u64 lun = -1;
int channel = -1;
int i;
i2o_shost = i2o_scsi_get_host(c);
if (!i2o_shost)
return -EFAULT;
scsi_host = i2o_shost->scsi_host;
switch (i2o_dev->lct_data.class_id) {
case I2O_CLASS_RANDOM_BLOCK_STORAGE:
case I2O_CLASS_EXECUTIVE:
#ifdef CONFIG_I2O_EXT_ADAPTEC
if (c->adaptec) {
u8 type;
struct i2o_device *d = i2o_shost->channel[0];
if (i2o_parm_field_get(d, 0x0000, 0, &type, 1)
&& (type == 0x01)) /* SCSI bus */
if (i2o_parm_field_get(d, 0x0200, 4, &id, 4)) {
channel = 0;
if (i2o_dev->lct_data.class_id ==
I2O_CLASS_RANDOM_BLOCK_STORAGE)
lun = i2o_shost->lun++;
else
lun = 0;
}
}
#endif
break;
case I2O_CLASS_SCSI_PERIPHERAL:
if (i2o_parm_field_get(i2o_dev, 0x0000, 3, &id, 4) < 0)
return -EFAULT;
if (i2o_parm_field_get(i2o_dev, 0x0000, 4, &lun, 8) < 0)
return -EFAULT;
parent = i2o_iop_find_device(c, i2o_dev->lct_data.parent_tid);
if (!parent) {
osm_warn("can not find parent of device %03x\n",
i2o_dev->lct_data.tid);
return -EFAULT;
}
for (i = 0; i <= i2o_shost->scsi_host->max_channel; i++)
if (i2o_shost->channel[i] == parent)
channel = i;
break;
default:
return -EFAULT;
}
if (channel == -1) {
osm_warn("can not find channel of device %03x\n",
i2o_dev->lct_data.tid);
return -EFAULT;
}
if (id >= scsi_host->max_id) {
osm_warn("SCSI device id (%d) >= max_id of I2O host (%d)", id,
scsi_host->max_id);
return -EFAULT;
}
if (lun >= scsi_host->max_lun) {
osm_warn("SCSI device id (%d) >= max_lun of I2O host (%d)",
(unsigned int)lun, scsi_host->max_lun);
return -EFAULT;
}
scsi_dev =
__scsi_add_device(i2o_shost->scsi_host, channel, id, lun, i2o_dev);
if (IS_ERR(scsi_dev)) {
osm_warn("can not add SCSI device %03x\n",
i2o_dev->lct_data.tid);
return PTR_ERR(scsi_dev);
}
sysfs_create_link(&i2o_dev->device.kobj, &scsi_dev->sdev_gendev.kobj,
"scsi");
osm_info("device added (TID: %03x) channel: %d, id: %d, lun: %d\n",
i2o_dev->lct_data.tid, channel, id, (unsigned int)lun);
return 0;
};
static const char *i2o_scsi_info(struct Scsi_Host *SChost)
{
struct i2o_scsi_host *hostdata;
hostdata = (struct i2o_scsi_host *)SChost->hostdata;
return hostdata->iop->name;
}
/**
* i2o_scsi_reply - SCSI OSM message reply handler
* @c: controller issuing the reply
* @m: message id for flushing
* @msg: the message from the controller
*
* Process reply messages (interrupts in normal scsi controller think).
* We can get a variety of messages to process. The normal path is
* scsi command completions. We must also deal with IOP failures,
* the reply to a bus reset and the reply to a LUN query.
*
* Returns 0 on success and if the reply should not be flushed or > 0
* on success and if the reply should be flushed. Returns negative error
* code on failure and if the reply should be flushed.
*/
static int i2o_scsi_reply(struct i2o_controller *c, u32 m,
struct i2o_message *msg)
{
struct scsi_cmnd *cmd;
u32 error;
struct device *dev;
cmd = i2o_cntxt_list_get(c, le32_to_cpu(msg->u.s.tcntxt));
if (unlikely(!cmd)) {
osm_err("NULL reply received!\n");
return -1;
}
/*
* Low byte is device status, next is adapter status,
* (then one byte reserved), then request status.
*/
error = le32_to_cpu(msg->body[0]);
osm_debug("Completed %ld\n", cmd->serial_number);
cmd->result = error & 0xff;
/*
* if DeviceStatus is not SCSI_SUCCESS copy over the sense data and let
* the SCSI layer handle the error
*/
if (cmd->result)
memcpy(cmd->sense_buffer, &msg->body[3],
min(sizeof(cmd->sense_buffer), (size_t) 40));
/* only output error code if AdapterStatus is not HBA_SUCCESS */
if ((error >> 8) & 0xff)
osm_err("SCSI error %08x\n", error);
dev = &c->pdev->dev;
if (cmd->use_sg)
dma_unmap_sg(dev, cmd->request_buffer, cmd->use_sg,
cmd->sc_data_direction);
else if (cmd->SCp.dma_handle)
dma_unmap_single(dev, cmd->SCp.dma_handle, cmd->request_bufflen,
cmd->sc_data_direction);
cmd->scsi_done(cmd);
return 1;
};
/**
* i2o_scsi_notify_device_add - Retrieve notifications of added devices
* @i2o_dev: the I2O device which was added
*
* If a I2O device is added we catch the notification, because I2O classes
* other then SCSI peripheral will not be received through
* i2o_scsi_probe().
*/
static void i2o_scsi_notify_device_add(struct i2o_device *i2o_dev)
{
switch (i2o_dev->lct_data.class_id) {
case I2O_CLASS_EXECUTIVE:
case I2O_CLASS_RANDOM_BLOCK_STORAGE:
i2o_scsi_probe(&i2o_dev->device);
break;
default:
break;
}
};
/**
* i2o_scsi_notify_device_remove - Retrieve notifications of removed
* devices
* @i2o_dev: the I2O device which was removed
*
* If a I2O device is removed, we catch the notification to remove the
* corresponding SCSI device.
*/
static void i2o_scsi_notify_device_remove(struct i2o_device *i2o_dev)
{
switch (i2o_dev->lct_data.class_id) {
case I2O_CLASS_EXECUTIVE:
case I2O_CLASS_RANDOM_BLOCK_STORAGE:
i2o_scsi_remove(&i2o_dev->device);
break;
default:
break;
}
};
/**
* i2o_scsi_notify_controller_add - Retrieve notifications of added
* controllers
* @c: the controller which was added
*
* If a I2O controller is added, we catch the notification to add a
* corresponding Scsi_Host.
*/
static void i2o_scsi_notify_controller_add(struct i2o_controller *c)
{
struct i2o_scsi_host *i2o_shost;
int rc;
i2o_shost = i2o_scsi_host_alloc(c);
if (IS_ERR(i2o_shost)) {
osm_err("Could not initialize SCSI host\n");
return;
}
rc = scsi_add_host(i2o_shost->scsi_host, &c->device);
if (rc) {
osm_err("Could not add SCSI host\n");
scsi_host_put(i2o_shost->scsi_host);
return;
}
c->driver_data[i2o_scsi_driver.context] = i2o_shost;
osm_debug("new I2O SCSI host added\n");
};
/**
* i2o_scsi_notify_controller_remove - Retrieve notifications of removed
* controllers
* @c: the controller which was removed
*
* If a I2O controller is removed, we catch the notification to remove the
* corresponding Scsi_Host.
*/
static void i2o_scsi_notify_controller_remove(struct i2o_controller *c)
{
struct i2o_scsi_host *i2o_shost;
i2o_shost = i2o_scsi_get_host(c);
if (!i2o_shost)
return;
c->driver_data[i2o_scsi_driver.context] = NULL;
scsi_remove_host(i2o_shost->scsi_host);
scsi_host_put(i2o_shost->scsi_host);
osm_debug("I2O SCSI host removed\n");
};
/* SCSI OSM driver struct */
static struct i2o_driver i2o_scsi_driver = {
.name = OSM_NAME,
.reply = i2o_scsi_reply,
.classes = i2o_scsi_class_id,
.notify_device_add = i2o_scsi_notify_device_add,
.notify_device_remove = i2o_scsi_notify_device_remove,
.notify_controller_add = i2o_scsi_notify_controller_add,
.notify_controller_remove = i2o_scsi_notify_controller_remove,
.driver = {
.probe = i2o_scsi_probe,
.remove = i2o_scsi_remove,
},
};
/**
* i2o_scsi_queuecommand - queue a SCSI command
* @SCpnt: scsi command pointer
* @done: callback for completion
*
* Issue a scsi command asynchronously. Return 0 on success or 1 if
* we hit an error (normally message queue congestion). The only
* minor complication here is that I2O deals with the device addressing
* so we have to map the bus/dev/lun back to an I2O handle as well
* as faking absent devices ourself.
*
* Locks: takes the controller lock on error path only
*/
static int i2o_scsi_queuecommand(struct scsi_cmnd *SCpnt,
void (*done) (struct scsi_cmnd *))
{
struct i2o_controller *c;
struct i2o_device *i2o_dev;
int tid;
struct i2o_message __iomem *msg;
u32 m;
/*
* ENABLE_DISCONNECT
* SIMPLE_TAG
* RETURN_SENSE_DATA_IN_REPLY_MESSAGE_FRAME
*/
u32 scsi_flags = 0x20a00000;
u32 sgl_offset;
u32 __iomem *mptr;
u32 cmd = I2O_CMD_SCSI_EXEC << 24;
int rc = 0;
/*
* Do the incoming paperwork
*/
i2o_dev = SCpnt->device->hostdata;
c = i2o_dev->iop;
SCpnt->scsi_done = done;
if (unlikely(!i2o_dev)) {
osm_warn("no I2O device in request\n");
SCpnt->result = DID_NO_CONNECT << 16;
done(SCpnt);
goto exit;
}
tid = i2o_dev->lct_data.tid;
osm_debug("qcmd: Tid = %03x\n", tid);
osm_debug("Real scsi messages.\n");
/*
* Put together a scsi execscb message
*/
switch (SCpnt->sc_data_direction) {
case PCI_DMA_NONE:
/* DATA NO XFER */
sgl_offset = SGL_OFFSET_0;
break;
case PCI_DMA_TODEVICE:
/* DATA OUT (iop-->dev) */
scsi_flags |= 0x80000000;
sgl_offset = SGL_OFFSET_10;
break;
case PCI_DMA_FROMDEVICE:
/* DATA IN (iop<--dev) */
scsi_flags |= 0x40000000;
sgl_offset = SGL_OFFSET_10;
break;
default:
/* Unknown - kill the command */
SCpnt->result = DID_NO_CONNECT << 16;
done(SCpnt);
goto exit;
}
/*
* Obtain an I2O message. If there are none free then
* throw it back to the scsi layer
*/
m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
if (m == I2O_QUEUE_EMPTY) {
rc = SCSI_MLQUEUE_HOST_BUSY;
goto exit;
}
mptr = &msg->body[0];
#ifdef CONFIG_I2O_EXT_ADAPTEC
if (c->adaptec) {
u32 adpt_flags = 0;
if (SCpnt->sc_request && SCpnt->sc_request->upper_private_data) {
i2o_sg_io_hdr_t __user *usr_ptr =
((Sg_request *) (SCpnt->sc_request->
upper_private_data))->header.
usr_ptr;
if (usr_ptr)
get_user(adpt_flags, &usr_ptr->flags);
}
switch (i2o_dev->lct_data.class_id) {
case I2O_CLASS_EXECUTIVE:
case I2O_CLASS_RANDOM_BLOCK_STORAGE:
/* interpret flag has to be set for executive */
adpt_flags ^= I2O_DPT_SG_FLAG_INTERPRET;
break;
default:
break;
}
/*
* for Adaptec controllers we use the PRIVATE command, because
* the normal SCSI EXEC doesn't support all SCSI commands on
* all controllers (for example READ CAPACITY).
*/
if (sgl_offset == SGL_OFFSET_10)
sgl_offset = SGL_OFFSET_12;
cmd = I2O_CMD_PRIVATE << 24;
writel(I2O_VENDOR_DPT << 16 | I2O_CMD_SCSI_EXEC, mptr++);
writel(adpt_flags | tid, mptr++);
}
#endif
writel(cmd | HOST_TID << 12 | tid, &msg->u.head[1]);
writel(i2o_scsi_driver.context, &msg->u.s.icntxt);
/* We want the SCSI control block back */
writel(i2o_cntxt_list_add(c, SCpnt), &msg->u.s.tcntxt);
/* LSI_920_PCI_QUIRK
*
* Intermittant observations of msg frame word data corruption
* observed on msg[4] after:
* WRITE, READ-MODIFY-WRITE
* operations. 19990606 -sralston
*
* (Hence we build this word via tag. Its good practice anyway
* we don't want fetches over PCI needlessly)
*/
/* Attach tags to the devices */
/* FIXME: implement
if(SCpnt->device->tagged_supported) {
if(SCpnt->tag == HEAD_OF_QUEUE_TAG)
scsi_flags |= 0x01000000;
else if(SCpnt->tag == ORDERED_QUEUE_TAG)
scsi_flags |= 0x01800000;
}
*/
writel(scsi_flags | SCpnt->cmd_len, mptr++);
/* Write SCSI command into the message - always 16 byte block */
memcpy_toio(mptr, SCpnt->cmnd, 16);
mptr += 4;
if (sgl_offset != SGL_OFFSET_0) {
/* write size of data addressed by SGL */
writel(SCpnt->request_bufflen, mptr++);
/* Now fill in the SGList and command */
if (SCpnt->use_sg) {
if (!i2o_dma_map_sg(c, SCpnt->request_buffer,
SCpnt->use_sg,
SCpnt->sc_data_direction, &mptr))
goto nomem;
} else {
SCpnt->SCp.dma_handle =
i2o_dma_map_single(c, SCpnt->request_buffer,
SCpnt->request_bufflen,
SCpnt->sc_data_direction, &mptr);
if (dma_mapping_error(SCpnt->SCp.dma_handle))
goto nomem;
}
}
/* Stick the headers on */
writel(I2O_MESSAGE_SIZE(mptr - &msg->u.head[0]) | sgl_offset,
&msg->u.head[0]);
/* Queue the message */
i2o_msg_post(c, m);
osm_debug("Issued %ld\n", SCpnt->serial_number);
return 0;
nomem:
rc = -ENOMEM;
i2o_msg_nop(c, m);
exit:
return rc;
};
/**
* i2o_scsi_abort - abort a running command
* @SCpnt: command to abort
*
* Ask the I2O controller to abort a command. This is an asynchrnous
* process and our callback handler will see the command complete with an
* aborted message if it succeeds.
*
* Returns 0 if the command is successfully aborted or negative error code
* on failure.
*/
static int i2o_scsi_abort(struct scsi_cmnd *SCpnt)
{
struct i2o_device *i2o_dev;
struct i2o_controller *c;
struct i2o_message __iomem *msg;
u32 m;
int tid;
int status = FAILED;
osm_warn("Aborting command block.\n");
i2o_dev = SCpnt->device->hostdata;
c = i2o_dev->iop;
tid = i2o_dev->lct_data.tid;
m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
if (m == I2O_QUEUE_EMPTY)
return SCSI_MLQUEUE_HOST_BUSY;
writel(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
writel(I2O_CMD_SCSI_ABORT << 24 | HOST_TID << 12 | tid,
&msg->u.head[1]);
writel(i2o_cntxt_list_get_ptr(c, SCpnt), &msg->body[0]);
if (i2o_msg_post_wait(c, m, I2O_TIMEOUT_SCSI_SCB_ABORT))
status = SUCCESS;
return status;
}
/**
* i2o_scsi_bios_param - Invent disk geometry
* @sdev: scsi device
* @dev: block layer device
* @capacity: size in sectors
* @ip: geometry array
*
* This is anyones guess quite frankly. We use the same rules everyone
* else appears to and hope. It seems to work.
*/
static int i2o_scsi_bios_param(struct scsi_device *sdev,
struct block_device *dev, sector_t capacity,
int *ip)
{
int size;
size = capacity;
ip[0] = 64; /* heads */
ip[1] = 32; /* sectors */
if ((ip[2] = size >> 11) > 1024) { /* cylinders, test for big disk */
ip[0] = 255; /* heads */
ip[1] = 63; /* sectors */
ip[2] = size / (255 * 63); /* cylinders */
}
return 0;
}
static struct scsi_host_template i2o_scsi_host_template = {
.proc_name = OSM_NAME,
.name = OSM_DESCRIPTION,
.info = i2o_scsi_info,
.queuecommand = i2o_scsi_queuecommand,
.eh_abort_handler = i2o_scsi_abort,
.bios_param = i2o_scsi_bios_param,
.can_queue = I2O_SCSI_CAN_QUEUE,
.sg_tablesize = 8,
.cmd_per_lun = 6,
.use_clustering = ENABLE_CLUSTERING,
};
/**
* i2o_scsi_init - SCSI OSM initialization function
*
* Register SCSI OSM into I2O core.
*
* Returns 0 on success or negative error code on failure.
*/
static int __init i2o_scsi_init(void)
{
int rc;
printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n");
/* Register SCSI OSM into I2O core */
rc = i2o_driver_register(&i2o_scsi_driver);
if (rc) {
osm_err("Could not register SCSI driver\n");
return rc;
}
return 0;
};
/**
* i2o_scsi_exit - SCSI OSM exit function
*
* Unregisters SCSI OSM from I2O core.
*/
static void __exit i2o_scsi_exit(void)
{
/* Unregister I2O SCSI OSM from I2O core */
i2o_driver_unregister(&i2o_scsi_driver);
};
MODULE_AUTHOR("Red Hat Software");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION(OSM_DESCRIPTION);
MODULE_VERSION(OSM_VERSION);
module_init(i2o_scsi_init);
module_exit(i2o_scsi_exit);
