Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/message/i2o/i2o_scsi.c b/drivers/message/i2o/i2o_scsi.c
new file mode 100644
index 0000000..43f5875
--- /dev/null
+++ b/drivers/message/i2o/i2o_scsi.c
@@ -0,0 +1,830 @@
+/*
+ * 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 <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>
+
+#define OSM_NAME "scsi-osm"
+#define OSM_VERSION "$Rev$"
+#define OSM_DESCRIPTION "I2O SCSI Peripheral OSM"
+
+static struct i2o_driver i2o_scsi_driver;
+
+static int i2o_scsi_max_id = 16;
+static int i2o_scsi_max_lun = 8;
+
+struct i2o_scsi_host {
+ struct Scsi_Host *scsi_host; /* pointer to the SCSI host */
+ struct i2o_controller *iop; /* pointer to the I2O controller */
+ 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;
+ i2o_status_block *sb;
+
+ list_for_each_entry(i2o_dev, &c->devices, list)
+ if (i2o_dev->lct_data.class_id == I2O_CLASS_BUS_ADAPTER_PORT) {
+ if (i2o_parm_field_get(i2o_dev, 0x0000, 0, &type, 1) || (type == 1)) /* 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;
+
+ sb = c->status_block.virt;
+
+ scsi_host->sg_tablesize = (sb->inbound_frame_size -
+ sizeof(struct i2o_message) / 4 - 6) / 2;
+
+ i2o_shost = (struct i2o_scsi_host *)scsi_host->hostdata;
+ i2o_shost->scsi_host = scsi_host;
+ i2o_shost->iop = c;
+
+ i = 0;
+ list_for_each_entry(i2o_dev, &c->devices, list)
+ if (i2o_dev->lct_data.class_id == I2O_CLASS_BUS_ADAPTER_PORT) {
+ if (i2o_parm_field_get(i2o_dev, 0x0000, 0, &type, 1) || (type == 1)) /* 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;
+
+ i2o_shost = i2o_scsi_get_host(c);
+
+ shost_for_each_device(scsi_dev, i2o_shost->scsi_host)
+ if (scsi_dev->hostdata == i2o_dev) {
+ 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;
+ u64 lun;
+ int channel = -1;
+ int i;
+
+ i2o_shost = i2o_scsi_get_host(c);
+ if (!i2o_shost)
+ return -EFAULT;
+
+ scsi_host = i2o_shost->scsi_host;
+
+ if (i2o_parm_field_get(i2o_dev, 0, 3, &id, 4) < 0)
+ 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 (i2o_parm_field_get(i2o_dev, 0, 4, &lun, 8) < 0)
+ 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;
+ }
+
+ 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;
+
+ if (channel == -1) {
+ osm_warn("can not find channel of device %03x\n",
+ i2o_dev->lct_data.tid);
+ return -EFAULT;
+ }
+
+ scsi_dev =
+ __scsi_add_device(i2o_shost->scsi_host, channel, id, lun, i2o_dev);
+
+ if (!scsi_dev) {
+ osm_warn("can not add SCSI device %03x\n",
+ i2o_dev->lct_data.tid);
+ return -EFAULT;
+ }
+
+ osm_debug("added new SCSI device %03x (cannel: %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;
+ struct device *dev;
+ u8 as, ds, st;
+
+ cmd = i2o_cntxt_list_get(c, le32_to_cpu(msg->u.s.tcntxt));
+
+ if (msg->u.head[0] & (1 << 13)) {
+ struct i2o_message __iomem *pmsg; /* preserved message */
+ u32 pm;
+ int err = DID_ERROR;
+
+ pm = le32_to_cpu(msg->body[3]);
+
+ pmsg = i2o_msg_in_to_virt(c, pm);
+
+ osm_err("IOP fail.\n");
+ osm_err("From %d To %d Cmd %d.\n",
+ (msg->u.head[1] >> 12) & 0xFFF,
+ msg->u.head[1] & 0xFFF, msg->u.head[1] >> 24);
+ osm_err("Failure Code %d.\n", msg->body[0] >> 24);
+ if (msg->body[0] & (1 << 16))
+ osm_err("Format error.\n");
+ if (msg->body[0] & (1 << 17))
+ osm_err("Path error.\n");
+ if (msg->body[0] & (1 << 18))
+ osm_err("Path State.\n");
+ if (msg->body[0] & (1 << 18))
+ {
+ osm_err("Congestion.\n");
+ err = DID_BUS_BUSY;
+ }
+
+ osm_debug("Failing message is %p.\n", pmsg);
+
+ cmd = i2o_cntxt_list_get(c, readl(&pmsg->u.s.tcntxt));
+ if (!cmd)
+ return 1;
+
+ cmd->result = err << 16;
+ cmd->scsi_done(cmd);
+
+ /* Now flush the message by making it a NOP */
+ i2o_msg_nop(c, pm);
+
+ return 1;
+ }
+
+ /*
+ * Low byte is device status, next is adapter status,
+ * (then one byte reserved), then request status.
+ */
+ ds = (u8) le32_to_cpu(msg->body[0]);
+ as = (u8) (le32_to_cpu(msg->body[0]) >> 8);
+ st = (u8) (le32_to_cpu(msg->body[0]) >> 24);
+
+ /*
+ * Is this a control request coming back - eg an abort ?
+ */
+
+ if (!cmd) {
+ if (st)
+ osm_warn("SCSI abort: %08X", le32_to_cpu(msg->body[0]));
+ osm_info("SCSI abort completed.\n");
+ return -EFAULT;
+ }
+
+ osm_debug("Completed %ld\n", cmd->serial_number);
+
+ if (st) {
+ u32 count, error;
+ /* An error has occurred */
+
+ switch (st) {
+ case 0x06:
+ count = le32_to_cpu(msg->body[1]);
+ if (count < cmd->underflow) {
+ int i;
+
+ osm_err("SCSI underflow 0x%08X 0x%08X\n", count,
+ cmd->underflow);
+ osm_debug("Cmd: ");
+ for (i = 0; i < 15; i++)
+ pr_debug("%02X ", cmd->cmnd[i]);
+ pr_debug(".\n");
+ cmd->result = (DID_ERROR << 16);
+ }
+ break;
+
+ default:
+ error = le32_to_cpu(msg->body[0]);
+
+ osm_err("SCSI error %08x\n", error);
+
+ if ((error & 0xff) == 0x02 /*CHECK_CONDITION */ ) {
+ int i;
+ u32 len = sizeof(cmd->sense_buffer);
+ len = (len > 40) ? 40 : len;
+ // Copy over the sense data
+ memcpy(cmd->sense_buffer, (void *)&msg->body[3],
+ len);
+ for (i = 0; i <= len; i++)
+ osm_info("%02x\n",
+ cmd->sense_buffer[i]);
+ if (cmd->sense_buffer[0] == 0x70
+ && cmd->sense_buffer[2] == DATA_PROTECT) {
+ /* This is to handle an array failed */
+ cmd->result = (DID_TIME_OUT << 16);
+ printk(KERN_WARNING "%s: SCSI Data "
+ "Protect-Device (%d,%d,%d) "
+ "hba_status=0x%x, dev_status="
+ "0x%x, cmd=0x%x\n", c->name,
+ (u32) cmd->device->channel,
+ (u32) cmd->device->id,
+ (u32) cmd->device->lun,
+ (error >> 8) & 0xff,
+ error & 0xff, cmd->cmnd[0]);
+ } else
+ cmd->result = (DID_ERROR << 16);
+
+ break;
+ }
+
+ switch (as) {
+ case 0x0E:
+ /* SCSI Reset */
+ cmd->result = DID_RESET << 16;
+ break;
+
+ case 0x0F:
+ cmd->result = DID_PARITY << 16;
+ break;
+
+ default:
+ cmd->result = DID_ERROR << 16;
+ break;
+ }
+
+ break;
+ }
+
+ cmd->scsi_done(cmd);
+ return 1;
+ }
+
+ cmd->result = DID_OK << 16 | ds;
+
+ cmd->scsi_done(cmd);
+
+ dev = &c->pdev->dev;
+ if (cmd->use_sg)
+ dma_unmap_sg(dev, (struct scatterlist *)cmd->buffer,
+ cmd->use_sg, cmd->sc_data_direction);
+ else if (cmd->request_bufflen)
+ dma_unmap_single(dev, (dma_addr_t) ((long)cmd->SCp.ptr),
+ cmd->request_bufflen, cmd->sc_data_direction);
+
+ return 1;
+};
+
+/**
+ * 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);
+ pr_info("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_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 Scsi_Host *host;
+ struct i2o_device *i2o_dev;
+ struct device *dev;
+ int tid;
+ struct i2o_message __iomem *msg;
+ u32 m;
+ u32 scsi_flags, sg_flags;
+ u32 __iomem *mptr;
+ u32 __iomem *lenptr;
+ u32 len, reqlen;
+ int i;
+
+ /*
+ * Do the incoming paperwork
+ */
+
+ i2o_dev = SCpnt->device->hostdata;
+ host = SCpnt->device->host;
+ c = i2o_dev->iop;
+ dev = &c->pdev->dev;
+
+ SCpnt->scsi_done = done;
+
+ if (unlikely(!i2o_dev)) {
+ osm_warn("no I2O device in request\n");
+ SCpnt->result = DID_NO_CONNECT << 16;
+ done(SCpnt);
+ return 0;
+ }
+
+ tid = i2o_dev->lct_data.tid;
+
+ osm_debug("qcmd: Tid = %03x\n", tid);
+ osm_debug("Real scsi messages.\n");
+
+ /*
+ * 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)
+ return SCSI_MLQUEUE_HOST_BUSY;
+
+ /*
+ * Put together a scsi execscb message
+ */
+
+ len = SCpnt->request_bufflen;
+
+ switch (SCpnt->sc_data_direction) {
+ case PCI_DMA_NONE:
+ scsi_flags = 0x00000000; // DATA NO XFER
+ sg_flags = 0x00000000;
+ break;
+
+ case PCI_DMA_TODEVICE:
+ scsi_flags = 0x80000000; // DATA OUT (iop-->dev)
+ sg_flags = 0x14000000;
+ break;
+
+ case PCI_DMA_FROMDEVICE:
+ scsi_flags = 0x40000000; // DATA IN (iop<--dev)
+ sg_flags = 0x10000000;
+ break;
+
+ default:
+ /* Unknown - kill the command */
+ SCpnt->result = DID_NO_CONNECT << 16;
+ done(SCpnt);
+ return 0;
+ }
+
+ writel(I2O_CMD_SCSI_EXEC << 24 | 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 */
+ /*
+ 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;
+ }
+ */
+
+ /* Direction, disconnect ok, tag, CDBLen */
+ writel(scsi_flags | 0x20200000 | SCpnt->cmd_len, &msg->body[0]);
+
+ mptr = &msg->body[1];
+
+ /* Write SCSI command into the message - always 16 byte block */
+ memcpy_toio(mptr, SCpnt->cmnd, 16);
+ mptr += 4;
+ lenptr = mptr++; /* Remember me - fill in when we know */
+
+ reqlen = 12; // SINGLE SGE
+
+ /* Now fill in the SGList and command */
+ if (SCpnt->use_sg) {
+ struct scatterlist *sg;
+ int sg_count;
+
+ sg = SCpnt->request_buffer;
+ len = 0;
+
+ sg_count = dma_map_sg(dev, sg, SCpnt->use_sg,
+ SCpnt->sc_data_direction);
+
+ if (unlikely(sg_count <= 0))
+ return -ENOMEM;
+
+ for (i = SCpnt->use_sg; i > 0; i--) {
+ if (i == 1)
+ sg_flags |= 0xC0000000;
+ writel(sg_flags | sg_dma_len(sg), mptr++);
+ writel(sg_dma_address(sg), mptr++);
+ len += sg_dma_len(sg);
+ sg++;
+ }
+
+ reqlen = mptr - &msg->u.head[0];
+ writel(len, lenptr);
+ } else {
+ len = SCpnt->request_bufflen;
+
+ writel(len, lenptr);
+
+ if (len > 0) {
+ dma_addr_t dma_addr;
+
+ dma_addr = dma_map_single(dev, SCpnt->request_buffer,
+ SCpnt->request_bufflen,
+ SCpnt->sc_data_direction);
+ if (!dma_addr)
+ return -ENOMEM;
+
+ SCpnt->SCp.ptr = (void *)(unsigned long)dma_addr;
+ sg_flags |= 0xC0000000;
+ writel(sg_flags | SCpnt->request_bufflen, mptr++);
+ writel(dma_addr, mptr++);
+ } else
+ reqlen = 9;
+ }
+
+ /* Stick the headers on */
+ writel(reqlen << 16 | SGL_OFFSET_10, &msg->u.head[0]);
+
+ /* Queue the message */
+ i2o_msg_post(c, m);
+
+ osm_debug("Issued %ld\n", SCpnt->serial_number);
+
+ return 0;
+};
+
+/**
+ * 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);