diff options
Diffstat (limited to 'drivers/staging/i2o/i2o_scsi.c')
| -rw-r--r-- | drivers/staging/i2o/i2o_scsi.c | 814 |
1 files changed, 814 insertions, 0 deletions
diff --git a/drivers/staging/i2o/i2o_scsi.c b/drivers/staging/i2o/i2o_scsi.c new file mode 100644 index 000000000000..1b11dcb3faea --- /dev/null +++ b/drivers/staging/i2o/i2o_scsi.c @@ -0,0 +1,814 @@ +/* + * 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 "i2o.h" +#include <linux/scatterlist.h> + +#include <asm/dma.h> +#include <asm/io.h> +#include <linux/atomic.h> + +#include <scsi/scsi.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/sg.h> + +#define OSM_NAME "scsi-osm" +#define OSM_VERSION "1.316" +#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 */ + u64 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 everything 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, rc; + + 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 = + cpu_to_le64(i2o_shost-> + lun++); + else + lun = 0; + } + } +#endif + break; + + case I2O_CLASS_SCSI_PERIPHERAL: + if (i2o_parm_field_get(i2o_dev, 0x0000, 3, &id, 4)) + return -EFAULT; + + if (i2o_parm_field_get(i2o_dev, 0x0000, 4, &lun, 8)) + 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 (le32_to_cpu(id) >= scsi_host->max_id) { + osm_warn("SCSI device id (%d) >= max_id of I2O host (%d)", + le32_to_cpu(id), scsi_host->max_id); + return -EFAULT; + } + + if (le64_to_cpu(lun) >= scsi_host->max_lun) { + osm_warn("SCSI device lun (%llu) >= max_lun of I2O host (%llu)", + le64_to_cpu(lun), scsi_host->max_lun); + return -EFAULT; + } + + scsi_dev = + __scsi_add_device(i2o_shost->scsi_host, channel, le32_to_cpu(id), + le64_to_cpu(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); + } + + rc = sysfs_create_link(&i2o_dev->device.kobj, + &scsi_dev->sdev_gendev.kobj, "scsi"); + if (rc) + goto err; + + osm_info("device added (TID: %03x) channel: %d, id: %d, lun: %llu\n", + i2o_dev->lct_data.tid, channel, le32_to_cpu(id), + le64_to_cpu(lun)); + + return 0; + +err: + scsi_remove_device(scsi_dev); + return rc; +}; + +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 %0x%p\n", cmd); + + 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(SCSI_SENSE_BUFFERSIZE, 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; + + scsi_dma_unmap(cmd); + + 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 than 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_lck(struct scsi_cmnd *SCpnt, + void (*done) (struct scsi_cmnd *)) +{ + struct i2o_controller *c; + struct i2o_device *i2o_dev; + int tid; + struct i2o_message *msg; + /* + * ENABLE_DISCONNECT + * SIMPLE_TAG + * RETURN_SENSE_DATA_IN_REPLY_MESSAGE_FRAME + */ + u32 scsi_flags = 0x20a00000; + u32 sgl_offset; + u32 *mptr; + u32 cmd = I2O_CMD_SCSI_EXEC << 24; + int rc = 0; + + /* + * Do the incoming paperwork + */ + i2o_dev = SCpnt->device->hostdata; + + 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; + } + c = i2o_dev->iop; + 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 + */ + + msg = i2o_msg_get(c); + if (IS_ERR(msg)) { + rc = SCSI_MLQUEUE_HOST_BUSY; + goto exit; + } + + mptr = &msg->body[0]; + +#if 0 /* this code can't work */ +#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; + *mptr++ = cpu_to_le32(I2O_VENDOR_DPT << 16 | I2O_CMD_SCSI_EXEC); + *mptr++ = cpu_to_le32(adpt_flags | tid); + } +#endif +#endif + + msg->u.head[1] = cpu_to_le32(cmd | HOST_TID << 12 | tid); + msg->u.s.icntxt = cpu_to_le32(i2o_scsi_driver.context); + + /* We want the SCSI control block back */ + msg->u.s.tcntxt = cpu_to_le32(i2o_cntxt_list_add(c, SCpnt)); + + /* 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; + } + */ + + *mptr++ = cpu_to_le32(scsi_flags | SCpnt->cmd_len); + + /* Write SCSI command into the message - always 16 byte block */ + memcpy(mptr, SCpnt->cmnd, 16); + mptr += 4; + + if (sgl_offset != SGL_OFFSET_0) { + /* write size of data addressed by SGL */ + *mptr++ = cpu_to_le32(scsi_bufflen(SCpnt)); + + /* Now fill in the SGList and command */ + + if (scsi_sg_count(SCpnt)) { + if (!i2o_dma_map_sg(c, scsi_sglist(SCpnt), + scsi_sg_count(SCpnt), + SCpnt->sc_data_direction, &mptr)) + goto nomem; + } + } + + /* Stick the headers on */ + msg->u.head[0] = + cpu_to_le32(I2O_MESSAGE_SIZE(mptr - &msg->u.head[0]) | sgl_offset); + + /* Queue the message */ + i2o_msg_post(c, msg); + + osm_debug("Issued %0x%p\n", SCpnt); + + return 0; + + nomem: + rc = -ENOMEM; + i2o_msg_nop(c, msg); + + exit: + return rc; +} + +static DEF_SCSI_QCMD(i2o_scsi_queuecommand) + +/** + * 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 *msg; + 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; + + msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); + if (IS_ERR(msg)) + return SCSI_MLQUEUE_HOST_BUSY; + + msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0); + msg->u.head[1] = + cpu_to_le32(I2O_CMD_SCSI_ABORT << 24 | HOST_TID << 12 | tid); + msg->body[0] = cpu_to_le32(i2o_cntxt_list_get_ptr(c, SCpnt)); + + if (!i2o_msg_post_wait(c, msg, 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 anyone's 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); |