2005-04-17 06:20:36 +08:00
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* For the avoidance of doubt the "preferred form" of this code is one which
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* is in an open non patent encumbered format. Where cryptographic key signing
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* forms part of the process of creating an executable the information
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* including keys needed to generate an equivalently functional executable
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* are deemed to be part of the source code.
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*
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* Complications for I2O scsi
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*
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* o Each (bus,lun) is a logical device in I2O. We keep a map
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* table. We spoof failed selection for unmapped units
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* o Request sense buffers can come back for free.
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* o Scatter gather is a bit dynamic. We have to investigate at
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* setup time.
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* o Some of our resources are dynamically shared. The i2o core
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* needs a message reservation protocol to avoid swap v net
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* deadlocking. We need to back off queue requests.
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*
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* In general the firmware wants to help. Where its help isn't performance
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* useful we just ignore the aid. Its not worth the code in truth.
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*
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* Fixes/additions:
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* Steve Ralston:
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* Scatter gather now works
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* Markus Lidel <Markus.Lidel@shadowconnect.com>:
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* Minor fixes for 2.6.
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*
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* To Do:
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* 64bit cleanups
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* Fix the resource management problems.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/ioport.h>
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#include <linux/jiffies.h>
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#include <linux/interrupt.h>
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#include <linux/timer.h>
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#include <linux/delay.h>
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#include <linux/proc_fs.h>
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#include <linux/prefetch.h>
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#include <linux/pci.h>
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#include <linux/blkdev.h>
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#include <linux/i2o.h>
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2005-06-24 13:02:19 +08:00
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#include <linux/scatterlist.h>
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2005-04-17 06:20:36 +08:00
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#include <asm/dma.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/atomic.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_cmnd.h>
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2005-06-24 13:02:19 +08:00
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#include <scsi/scsi_request.h>
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#include <scsi/sg.h>
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#include <scsi/sg_request.h>
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2005-04-17 06:20:36 +08:00
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#define OSM_NAME "scsi-osm"
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2006-01-06 16:19:32 +08:00
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#define OSM_VERSION "1.316"
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2005-04-17 06:20:36 +08:00
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#define OSM_DESCRIPTION "I2O SCSI Peripheral OSM"
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static struct i2o_driver i2o_scsi_driver;
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2005-06-24 13:02:19 +08:00
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static unsigned int i2o_scsi_max_id = 16;
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static unsigned int i2o_scsi_max_lun = 255;
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2005-04-17 06:20:36 +08:00
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struct i2o_scsi_host {
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struct Scsi_Host *scsi_host; /* pointer to the SCSI host */
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struct i2o_controller *iop; /* pointer to the I2O controller */
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2005-06-24 13:02:19 +08:00
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unsigned int lun; /* lun's used for block devices */
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2005-04-17 06:20:36 +08:00
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struct i2o_device *channel[0]; /* channel->i2o_dev mapping table */
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};
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static struct scsi_host_template i2o_scsi_host_template;
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#define I2O_SCSI_CAN_QUEUE 4
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/* SCSI OSM class handling definition */
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static struct i2o_class_id i2o_scsi_class_id[] = {
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{I2O_CLASS_SCSI_PERIPHERAL},
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{I2O_CLASS_END}
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};
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static struct i2o_scsi_host *i2o_scsi_host_alloc(struct i2o_controller *c)
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{
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struct i2o_scsi_host *i2o_shost;
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struct i2o_device *i2o_dev;
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struct Scsi_Host *scsi_host;
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int max_channel = 0;
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u8 type;
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int i;
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size_t size;
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2005-06-24 13:02:19 +08:00
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u16 body_size = 6;
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#ifdef CONFIG_I2O_EXT_ADAPTEC
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if (c->adaptec)
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body_size = 8;
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#endif
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2005-04-17 06:20:36 +08:00
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list_for_each_entry(i2o_dev, &c->devices, list)
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2005-06-24 13:02:16 +08:00
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if (i2o_dev->lct_data.class_id == I2O_CLASS_BUS_ADAPTER) {
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2006-01-06 16:19:30 +08:00
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if (!i2o_parm_field_get(i2o_dev, 0x0000, 0, &type, 1)
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2005-06-24 13:02:19 +08:00
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&& (type == 0x01)) /* SCSI bus */
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2005-04-17 06:20:36 +08:00
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max_channel++;
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}
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if (!max_channel) {
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osm_warn("no channels found on %s\n", c->name);
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return ERR_PTR(-EFAULT);
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}
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size = max_channel * sizeof(struct i2o_device *)
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+ sizeof(struct i2o_scsi_host);
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scsi_host = scsi_host_alloc(&i2o_scsi_host_template, size);
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if (!scsi_host) {
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osm_warn("Could not allocate SCSI host\n");
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return ERR_PTR(-ENOMEM);
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}
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scsi_host->max_channel = max_channel - 1;
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scsi_host->max_id = i2o_scsi_max_id;
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scsi_host->max_lun = i2o_scsi_max_lun;
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scsi_host->this_id = c->unit;
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2005-06-24 13:02:19 +08:00
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scsi_host->sg_tablesize = i2o_sg_tablesize(c, body_size);
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2005-04-17 06:20:36 +08:00
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i2o_shost = (struct i2o_scsi_host *)scsi_host->hostdata;
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i2o_shost->scsi_host = scsi_host;
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i2o_shost->iop = c;
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2005-06-24 13:02:19 +08:00
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i2o_shost->lun = 1;
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2005-04-17 06:20:36 +08:00
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i = 0;
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list_for_each_entry(i2o_dev, &c->devices, list)
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2005-06-24 13:02:16 +08:00
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if (i2o_dev->lct_data.class_id == I2O_CLASS_BUS_ADAPTER) {
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2006-01-06 16:19:30 +08:00
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if (!i2o_parm_field_get(i2o_dev, 0x0000, 0, &type, 1)
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2005-06-24 13:02:19 +08:00
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&& (type == 0x01)) /* only SCSI bus */
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2005-04-17 06:20:36 +08:00
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i2o_shost->channel[i++] = i2o_dev;
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if (i >= max_channel)
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break;
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}
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return i2o_shost;
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};
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/**
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* i2o_scsi_get_host - Get an I2O SCSI host
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* @c: I2O controller to for which to get the SCSI host
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*
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* If the I2O controller already exists as SCSI host, the SCSI host
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* is returned, otherwise the I2O controller is added to the SCSI
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* core.
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*
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* Returns pointer to the I2O SCSI host on success or NULL on failure.
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*/
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static struct i2o_scsi_host *i2o_scsi_get_host(struct i2o_controller *c)
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{
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return c->driver_data[i2o_scsi_driver.context];
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};
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/**
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* i2o_scsi_remove - Remove I2O device from SCSI core
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* @dev: device which should be removed
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*
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* Removes the I2O device from the SCSI core again.
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*
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* Returns 0 on success.
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*/
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static int i2o_scsi_remove(struct device *dev)
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{
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struct i2o_device *i2o_dev = to_i2o_device(dev);
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struct i2o_controller *c = i2o_dev->iop;
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struct i2o_scsi_host *i2o_shost;
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struct scsi_device *scsi_dev;
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2005-06-24 13:02:14 +08:00
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osm_info("device removed (TID: %03x)\n", i2o_dev->lct_data.tid);
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2005-04-17 06:20:36 +08:00
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i2o_shost = i2o_scsi_get_host(c);
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shost_for_each_device(scsi_dev, i2o_shost->scsi_host)
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if (scsi_dev->hostdata == i2o_dev) {
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2005-06-24 13:02:16 +08:00
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sysfs_remove_link(&i2o_dev->device.kobj, "scsi");
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2005-04-17 06:20:36 +08:00
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scsi_remove_device(scsi_dev);
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scsi_device_put(scsi_dev);
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break;
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}
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return 0;
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};
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/**
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* i2o_scsi_probe - verify if dev is a I2O SCSI device and install it
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* @dev: device to verify if it is a I2O SCSI device
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*
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* Retrieve channel, id and lun for I2O device. If everthing goes well
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* register the I2O device as SCSI device on the I2O SCSI controller.
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*
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* Returns 0 on success or negative error code on failure.
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*/
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static int i2o_scsi_probe(struct device *dev)
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{
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struct i2o_device *i2o_dev = to_i2o_device(dev);
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struct i2o_controller *c = i2o_dev->iop;
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struct i2o_scsi_host *i2o_shost;
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struct Scsi_Host *scsi_host;
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struct i2o_device *parent;
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struct scsi_device *scsi_dev;
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2005-06-24 13:02:19 +08:00
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u32 id = -1;
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u64 lun = -1;
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2005-04-17 06:20:36 +08:00
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int channel = -1;
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int i;
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i2o_shost = i2o_scsi_get_host(c);
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if (!i2o_shost)
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return -EFAULT;
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scsi_host = i2o_shost->scsi_host;
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2005-06-24 13:02:19 +08:00
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switch (i2o_dev->lct_data.class_id) {
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case I2O_CLASS_RANDOM_BLOCK_STORAGE:
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case I2O_CLASS_EXECUTIVE:
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#ifdef CONFIG_I2O_EXT_ADAPTEC
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if (c->adaptec) {
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u8 type;
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struct i2o_device *d = i2o_shost->channel[0];
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2006-01-06 16:19:30 +08:00
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if (!i2o_parm_field_get(d, 0x0000, 0, &type, 1)
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2005-06-24 13:02:19 +08:00
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&& (type == 0x01)) /* SCSI bus */
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2006-01-06 16:19:30 +08:00
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if (!i2o_parm_field_get(d, 0x0200, 4, &id, 4)) {
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2005-06-24 13:02:19 +08:00
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channel = 0;
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if (i2o_dev->lct_data.class_id ==
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I2O_CLASS_RANDOM_BLOCK_STORAGE)
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2006-01-06 16:19:30 +08:00
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lun =
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cpu_to_le64(i2o_shost->
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lun++);
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2005-06-24 13:02:19 +08:00
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else
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lun = 0;
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}
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}
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#endif
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break;
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case I2O_CLASS_SCSI_PERIPHERAL:
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2006-01-06 16:19:30 +08:00
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if (i2o_parm_field_get(i2o_dev, 0x0000, 3, &id, 4))
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2005-06-24 13:02:19 +08:00
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return -EFAULT;
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2006-01-06 16:19:30 +08:00
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if (i2o_parm_field_get(i2o_dev, 0x0000, 4, &lun, 8))
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2005-06-24 13:02:19 +08:00
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return -EFAULT;
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parent = i2o_iop_find_device(c, i2o_dev->lct_data.parent_tid);
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if (!parent) {
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osm_warn("can not find parent of device %03x\n",
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i2o_dev->lct_data.tid);
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return -EFAULT;
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}
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for (i = 0; i <= i2o_shost->scsi_host->max_channel; i++)
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if (i2o_shost->channel[i] == parent)
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channel = i;
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break;
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default:
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return -EFAULT;
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}
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if (channel == -1) {
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osm_warn("can not find channel of device %03x\n",
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i2o_dev->lct_data.tid);
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2005-04-17 06:20:36 +08:00
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return -EFAULT;
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2005-06-24 13:02:19 +08:00
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}
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2005-04-17 06:20:36 +08:00
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2006-01-06 16:19:30 +08:00
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if (le32_to_cpu(id) >= scsi_host->max_id) {
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osm_warn("SCSI device id (%d) >= max_id of I2O host (%d)",
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le32_to_cpu(id), scsi_host->max_id);
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2005-04-17 06:20:36 +08:00
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return -EFAULT;
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}
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2006-01-06 16:19:30 +08:00
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if (le64_to_cpu(lun) >= scsi_host->max_lun) {
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osm_warn("SCSI device lun (%lu) >= max_lun of I2O host (%d)",
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(long unsigned int)le64_to_cpu(lun),
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scsi_host->max_lun);
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2005-04-17 06:20:36 +08:00
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return -EFAULT;
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}
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scsi_dev =
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2006-01-06 16:19:30 +08:00
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__scsi_add_device(i2o_shost->scsi_host, channel, le32_to_cpu(id),
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le64_to_cpu(lun), i2o_dev);
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2005-04-17 06:20:36 +08:00
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2005-06-24 13:02:16 +08:00
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if (IS_ERR(scsi_dev)) {
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2005-04-17 06:20:36 +08:00
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osm_warn("can not add SCSI device %03x\n",
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i2o_dev->lct_data.tid);
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2005-06-24 13:02:16 +08:00
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return PTR_ERR(scsi_dev);
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2005-04-17 06:20:36 +08:00
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}
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2005-06-24 13:02:19 +08:00
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sysfs_create_link(&i2o_dev->device.kobj, &scsi_dev->sdev_gendev.kobj,
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"scsi");
|
2005-06-24 13:02:16 +08:00
|
|
|
|
2006-01-06 16:19:32 +08:00
|
|
|
osm_info("device added (TID: %03x) channel: %d, id: %d, lun: %ld\n",
|
2006-01-06 16:19:30 +08:00
|
|
|
i2o_dev->lct_data.tid, channel, le32_to_cpu(id),
|
2006-01-06 16:19:32 +08:00
|
|
|
(long unsigned int)le64_to_cpu(lun));
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
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;
|
2005-06-24 13:02:21 +08:00
|
|
|
u32 error;
|
2005-04-17 06:20:36 +08:00
|
|
|
struct device *dev;
|
|
|
|
|
|
|
|
cmd = i2o_cntxt_list_get(c, le32_to_cpu(msg->u.s.tcntxt));
|
2005-06-24 13:02:21 +08:00
|
|
|
if (unlikely(!cmd)) {
|
|
|
|
osm_err("NULL reply received!\n");
|
|
|
|
return -1;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Low byte is device status, next is adapter status,
|
|
|
|
* (then one byte reserved), then request status.
|
|
|
|
*/
|
2005-06-24 13:02:21 +08:00
|
|
|
error = le32_to_cpu(msg->body[0]);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-06-24 13:02:21 +08:00
|
|
|
osm_debug("Completed %ld\n", cmd->serial_number);
|
|
|
|
|
|
|
|
cmd->result = error & 0xff;
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
2005-06-24 13:02:21 +08:00
|
|
|
* if DeviceStatus is not SCSI_SUCCESS copy over the sense data and let
|
|
|
|
* the SCSI layer handle the error
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
2005-06-24 13:02:21 +08:00
|
|
|
if (cmd->result)
|
|
|
|
memcpy(cmd->sense_buffer, &msg->body[3],
|
|
|
|
min(sizeof(cmd->sense_buffer), (size_t) 40));
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-06-24 13:02:21 +08:00
|
|
|
/* only output error code if AdapterStatus is not HBA_SUCCESS */
|
|
|
|
if ((error >> 8) & 0xff)
|
|
|
|
osm_err("SCSI error %08x\n", error);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-06-24 13:02:21 +08:00
|
|
|
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);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-06-24 13:02:21 +08:00
|
|
|
cmd->scsi_done(cmd);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-06-24 13:02:21 +08:00
|
|
|
return 1;
|
|
|
|
};
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-06-24 13:02:21 +08:00
|
|
|
/**
|
|
|
|
* 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;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-06-24 13:02:21 +08:00
|
|
|
default:
|
|
|
|
break;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2005-06-24 13:02:21 +08:00
|
|
|
};
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-06-24 13:02:21 +08:00
|
|
|
/**
|
|
|
|
* 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;
|
2005-06-24 13:02:14 +08:00
|
|
|
|
2005-06-24 13:02:21 +08:00
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 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);
|
2005-06-24 13:02:14 +08:00
|
|
|
osm_debug("I2O SCSI host removed\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
/* SCSI OSM driver struct */
|
|
|
|
static struct i2o_driver i2o_scsi_driver = {
|
|
|
|
.name = OSM_NAME,
|
|
|
|
.reply = i2o_scsi_reply,
|
|
|
|
.classes = i2o_scsi_class_id,
|
2005-06-24 13:02:21 +08:00
|
|
|
.notify_device_add = i2o_scsi_notify_device_add,
|
|
|
|
.notify_device_remove = i2o_scsi_notify_device_remove,
|
2005-04-17 06:20:36 +08:00
|
|
|
.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;
|
2006-01-06 16:19:29 +08:00
|
|
|
struct i2o_message *msg;
|
2005-06-24 13:02:16 +08:00
|
|
|
/*
|
|
|
|
* ENABLE_DISCONNECT
|
|
|
|
* SIMPLE_TAG
|
|
|
|
* RETURN_SENSE_DATA_IN_REPLY_MESSAGE_FRAME
|
|
|
|
*/
|
|
|
|
u32 scsi_flags = 0x20a00000;
|
2005-06-24 13:02:19 +08:00
|
|
|
u32 sgl_offset;
|
2006-01-06 16:19:29 +08:00
|
|
|
u32 *mptr;
|
2005-06-24 13:02:19 +08:00
|
|
|
u32 cmd = I2O_CMD_SCSI_EXEC << 24;
|
|
|
|
int rc = 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* 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);
|
2005-06-24 13:02:19 +08:00
|
|
|
goto exit;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
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:
|
2005-06-24 13:02:16 +08:00
|
|
|
/* DATA NO XFER */
|
2005-06-24 13:02:19 +08:00
|
|
|
sgl_offset = SGL_OFFSET_0;
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
|
|
|
|
case PCI_DMA_TODEVICE:
|
2005-06-24 13:02:16 +08:00
|
|
|
/* DATA OUT (iop-->dev) */
|
|
|
|
scsi_flags |= 0x80000000;
|
2005-06-24 13:02:19 +08:00
|
|
|
sgl_offset = SGL_OFFSET_10;
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
|
|
|
|
case PCI_DMA_FROMDEVICE:
|
2005-06-24 13:02:16 +08:00
|
|
|
/* DATA IN (iop<--dev) */
|
|
|
|
scsi_flags |= 0x40000000;
|
2005-06-24 13:02:19 +08:00
|
|
|
sgl_offset = SGL_OFFSET_10;
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
/* Unknown - kill the command */
|
|
|
|
SCpnt->result = DID_NO_CONNECT << 16;
|
|
|
|
done(SCpnt);
|
2005-06-24 13:02:19 +08:00
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Obtain an I2O message. If there are none free then
|
|
|
|
* throw it back to the scsi layer
|
|
|
|
*/
|
|
|
|
|
2006-01-06 16:19:29 +08:00
|
|
|
msg = i2o_msg_get(c);
|
|
|
|
if (IS_ERR(msg)) {
|
2005-06-24 13:02:19 +08:00
|
|
|
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;
|
2006-01-06 16:19:29 +08:00
|
|
|
*mptr++ = cpu_to_le32(I2O_VENDOR_DPT << 16 | I2O_CMD_SCSI_EXEC);
|
|
|
|
*mptr++ = cpu_to_le32(adpt_flags | tid);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2005-06-24 13:02:19 +08:00
|
|
|
#endif
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-01-06 16:19:29 +08:00
|
|
|
msg->u.head[1] = cpu_to_le32(cmd | HOST_TID << 12 | tid);
|
|
|
|
msg->u.s.icntxt = cpu_to_le32(i2o_scsi_driver.context);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* We want the SCSI control block back */
|
2006-01-06 16:19:29 +08:00
|
|
|
msg->u.s.tcntxt = cpu_to_le32(i2o_cntxt_list_add(c, SCpnt));
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* 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 */
|
2005-06-24 13:02:21 +08:00
|
|
|
/* FIXME: implement
|
2005-04-17 06:20:36 +08:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
*/
|
|
|
|
|
2006-01-06 16:19:29 +08:00
|
|
|
*mptr++ = cpu_to_le32(scsi_flags | SCpnt->cmd_len);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* Write SCSI command into the message - always 16 byte block */
|
2006-01-06 16:19:29 +08:00
|
|
|
memcpy(mptr, SCpnt->cmnd, 16);
|
2005-04-17 06:20:36 +08:00
|
|
|
mptr += 4;
|
|
|
|
|
2005-06-24 13:02:19 +08:00
|
|
|
if (sgl_offset != SGL_OFFSET_0) {
|
|
|
|
/* write size of data addressed by SGL */
|
2006-01-06 16:19:29 +08:00
|
|
|
*mptr++ = cpu_to_le32(SCpnt->request_bufflen);
|
2005-06-24 13:02:19 +08:00
|
|
|
|
|
|
|
/* 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;
|
2005-06-24 13:02:14 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Stick the headers on */
|
2006-01-06 16:19:29 +08:00
|
|
|
msg->u.head[0] =
|
|
|
|
cpu_to_le32(I2O_MESSAGE_SIZE(mptr - &msg->u.head[0]) | sgl_offset);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* Queue the message */
|
2006-01-06 16:19:29 +08:00
|
|
|
i2o_msg_post(c, msg);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
osm_debug("Issued %ld\n", SCpnt->serial_number);
|
|
|
|
|
|
|
|
return 0;
|
2005-06-24 13:02:19 +08:00
|
|
|
|
|
|
|
nomem:
|
|
|
|
rc = -ENOMEM;
|
2006-01-06 16:19:29 +08:00
|
|
|
i2o_msg_nop(c, msg);
|
2005-06-24 13:02:19 +08:00
|
|
|
|
|
|
|
exit:
|
|
|
|
return rc;
|
2005-04-17 06:20:36 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 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;
|
2006-01-06 16:19:29 +08:00
|
|
|
struct i2o_message *msg;
|
2005-04-17 06:20:36 +08:00
|
|
|
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;
|
|
|
|
|
2006-01-06 16:19:29 +08:00
|
|
|
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
|
|
|
|
if (IS_ERR(msg))
|
2005-04-17 06:20:36 +08:00
|
|
|
return SCSI_MLQUEUE_HOST_BUSY;
|
|
|
|
|
2006-01-06 16:19:29 +08:00
|
|
|
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));
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-02-05 15:27:39 +08:00
|
|
|
if (!i2o_msg_post_wait(c, msg, I2O_TIMEOUT_SCSI_SCB_ABORT))
|
2005-04-17 06:20:36 +08:00
|
|
|
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);
|