2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* Block OSM
|
|
|
|
*
|
|
|
|
* Copyright (C) 1999-2002 Red Hat Software
|
|
|
|
*
|
|
|
|
* Written by Alan Cox, Building Number Three Ltd
|
|
|
|
*
|
|
|
|
* 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 of the License, 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 purpose of avoiding doubt the preferred form of the work
|
|
|
|
* for making modifications shall be a standards compliant form such
|
|
|
|
* gzipped tar and not one requiring a proprietary or patent encumbered
|
|
|
|
* tool to unpack.
|
|
|
|
*
|
|
|
|
* Fixes/additions:
|
|
|
|
* Steve Ralston:
|
|
|
|
* Multiple device handling error fixes,
|
|
|
|
* Added a queue depth.
|
|
|
|
* Alan Cox:
|
|
|
|
* FC920 has an rmw bug. Dont or in the end marker.
|
|
|
|
* Removed queue walk, fixed for 64bitness.
|
|
|
|
* Rewrote much of the code over time
|
|
|
|
* Added indirect block lists
|
|
|
|
* Handle 64K limits on many controllers
|
|
|
|
* Don't use indirects on the Promise (breaks)
|
|
|
|
* Heavily chop down the queue depths
|
|
|
|
* Deepak Saxena:
|
|
|
|
* Independent queues per IOP
|
|
|
|
* Support for dynamic device creation/deletion
|
|
|
|
* Code cleanup
|
|
|
|
* Support for larger I/Os through merge* functions
|
|
|
|
* (taken from DAC960 driver)
|
|
|
|
* Boji T Kannanthanam:
|
|
|
|
* Set the I2O Block devices to be detected in increasing
|
|
|
|
* order of TIDs during boot.
|
|
|
|
* Search and set the I2O block device that we boot off
|
|
|
|
* from as the first device to be claimed (as /dev/i2o/hda)
|
|
|
|
* Properly attach/detach I2O gendisk structure from the
|
|
|
|
* system gendisk list. The I2O block devices now appear in
|
|
|
|
* /proc/partitions.
|
|
|
|
* Markus Lidel <Markus.Lidel@shadowconnect.com>:
|
|
|
|
* Minor bugfixes for 2.6.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/i2o.h>
|
|
|
|
|
|
|
|
#include <linux/mempool.h>
|
|
|
|
|
|
|
|
#include <linux/genhd.h>
|
|
|
|
#include <linux/blkdev.h>
|
|
|
|
#include <linux/hdreg.h>
|
|
|
|
|
2006-01-06 08:19:32 +00:00
|
|
|
#include <scsi/scsi.h>
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
#include "i2o_block.h"
|
|
|
|
|
|
|
|
#define OSM_NAME "block-osm"
|
2006-01-06 08:19:33 +00:00
|
|
|
#define OSM_VERSION "1.325"
|
2005-04-16 22:20:36 +00:00
|
|
|
#define OSM_DESCRIPTION "I2O Block Device OSM"
|
|
|
|
|
|
|
|
static struct i2o_driver i2o_block_driver;
|
|
|
|
|
|
|
|
/* global Block OSM request mempool */
|
|
|
|
static struct i2o_block_mempool i2o_blk_req_pool;
|
|
|
|
|
|
|
|
/* Block OSM class handling definition */
|
|
|
|
static struct i2o_class_id i2o_block_class_id[] = {
|
|
|
|
{I2O_CLASS_RANDOM_BLOCK_STORAGE},
|
|
|
|
{I2O_CLASS_END}
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_device_free - free the memory of the I2O Block device
|
|
|
|
* @dev: I2O Block device, which should be cleaned up
|
|
|
|
*
|
|
|
|
* Frees the request queue, gendisk and the i2o_block_device structure.
|
|
|
|
*/
|
|
|
|
static void i2o_block_device_free(struct i2o_block_device *dev)
|
|
|
|
{
|
|
|
|
blk_cleanup_queue(dev->gd->queue);
|
|
|
|
|
|
|
|
put_disk(dev->gd);
|
|
|
|
|
|
|
|
kfree(dev);
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_remove - remove the I2O Block device from the system again
|
|
|
|
* @dev: I2O Block device which should be removed
|
|
|
|
*
|
|
|
|
* Remove gendisk from system and free all allocated memory.
|
|
|
|
*
|
|
|
|
* Always returns 0.
|
|
|
|
*/
|
|
|
|
static int i2o_block_remove(struct device *dev)
|
|
|
|
{
|
|
|
|
struct i2o_device *i2o_dev = to_i2o_device(dev);
|
|
|
|
struct i2o_block_device *i2o_blk_dev = dev_get_drvdata(dev);
|
|
|
|
|
2005-06-24 05:02:14 +00:00
|
|
|
osm_info("device removed (TID: %03x): %s\n", i2o_dev->lct_data.tid,
|
|
|
|
i2o_blk_dev->gd->disk_name);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
i2o_event_register(i2o_dev, &i2o_block_driver, 0, 0);
|
|
|
|
|
|
|
|
del_gendisk(i2o_blk_dev->gd);
|
|
|
|
|
|
|
|
dev_set_drvdata(dev, NULL);
|
|
|
|
|
|
|
|
i2o_device_claim_release(i2o_dev);
|
|
|
|
|
|
|
|
i2o_block_device_free(i2o_blk_dev);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_device flush - Flush all dirty data of I2O device dev
|
|
|
|
* @dev: I2O device which should be flushed
|
|
|
|
*
|
|
|
|
* Flushes all dirty data on device dev.
|
|
|
|
*
|
|
|
|
* Returns 0 on success or negative error code on failure.
|
|
|
|
*/
|
|
|
|
static int i2o_block_device_flush(struct i2o_device *dev)
|
|
|
|
{
|
2006-01-06 08:19:29 +00:00
|
|
|
struct i2o_message *msg;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
|
|
|
|
if (IS_ERR(msg))
|
|
|
|
return PTR_ERR(msg);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
|
|
|
|
msg->u.head[1] =
|
|
|
|
cpu_to_le32(I2O_CMD_BLOCK_CFLUSH << 24 | HOST_TID << 12 | dev->
|
|
|
|
lct_data.tid);
|
|
|
|
msg->body[0] = cpu_to_le32(60 << 16);
|
2005-04-16 22:20:36 +00:00
|
|
|
osm_debug("Flushing...\n");
|
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
return i2o_msg_post_wait(dev->iop, msg, 60);
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
|
|
|
|
2005-06-24 05:02:16 +00:00
|
|
|
/**
|
|
|
|
* i2o_block_issue_flush - device-flush interface for block-layer
|
|
|
|
* @queue: the request queue of the device which should be flushed
|
|
|
|
* @disk: gendisk
|
|
|
|
* @error_sector: error offset
|
|
|
|
*
|
|
|
|
* Helper function to provide flush functionality to block-layer.
|
|
|
|
*
|
|
|
|
* Returns 0 on success or negative error code on failure.
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int i2o_block_issue_flush(request_queue_t * queue, struct gendisk *disk,
|
|
|
|
sector_t * error_sector)
|
|
|
|
{
|
|
|
|
struct i2o_block_device *i2o_blk_dev = queue->queuedata;
|
|
|
|
int rc = -ENODEV;
|
|
|
|
|
|
|
|
if (likely(i2o_blk_dev))
|
|
|
|
rc = i2o_block_device_flush(i2o_blk_dev->i2o_dev);
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/**
|
|
|
|
* i2o_block_device_mount - Mount (load) the media of device dev
|
|
|
|
* @dev: I2O device which should receive the mount request
|
|
|
|
* @media_id: Media Identifier
|
|
|
|
*
|
|
|
|
* Load a media into drive. Identifier should be set to -1, because the
|
|
|
|
* spec does not support any other value.
|
|
|
|
*
|
|
|
|
* Returns 0 on success or negative error code on failure.
|
|
|
|
*/
|
|
|
|
static int i2o_block_device_mount(struct i2o_device *dev, u32 media_id)
|
|
|
|
{
|
2006-01-06 08:19:29 +00:00
|
|
|
struct i2o_message *msg;
|
|
|
|
|
|
|
|
msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
|
|
|
|
if (IS_ERR(msg))
|
|
|
|
return PTR_ERR(msg);
|
|
|
|
|
|
|
|
msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
|
|
|
|
msg->u.head[1] =
|
|
|
|
cpu_to_le32(I2O_CMD_BLOCK_MMOUNT << 24 | HOST_TID << 12 | dev->
|
|
|
|
lct_data.tid);
|
|
|
|
msg->body[0] = cpu_to_le32(-1);
|
|
|
|
msg->body[1] = cpu_to_le32(0x00000000);
|
2005-04-16 22:20:36 +00:00
|
|
|
osm_debug("Mounting...\n");
|
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
return i2o_msg_post_wait(dev->iop, msg, 2);
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_device_lock - Locks the media of device dev
|
|
|
|
* @dev: I2O device which should receive the lock request
|
|
|
|
* @media_id: Media Identifier
|
|
|
|
*
|
|
|
|
* Lock media of device dev to prevent removal. The media identifier
|
|
|
|
* should be set to -1, because the spec does not support any other value.
|
|
|
|
*
|
|
|
|
* Returns 0 on success or negative error code on failure.
|
|
|
|
*/
|
|
|
|
static int i2o_block_device_lock(struct i2o_device *dev, u32 media_id)
|
|
|
|
{
|
2006-01-06 08:19:29 +00:00
|
|
|
struct i2o_message *msg;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
|
2007-07-17 11:04:25 +00:00
|
|
|
if (IS_ERR(msg))
|
2006-01-06 08:19:29 +00:00
|
|
|
return PTR_ERR(msg);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
|
|
|
|
msg->u.head[1] =
|
|
|
|
cpu_to_le32(I2O_CMD_BLOCK_MLOCK << 24 | HOST_TID << 12 | dev->
|
|
|
|
lct_data.tid);
|
|
|
|
msg->body[0] = cpu_to_le32(-1);
|
2005-04-16 22:20:36 +00:00
|
|
|
osm_debug("Locking...\n");
|
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
return i2o_msg_post_wait(dev->iop, msg, 2);
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_device_unlock - Unlocks the media of device dev
|
|
|
|
* @dev: I2O device which should receive the unlocked request
|
|
|
|
* @media_id: Media Identifier
|
|
|
|
*
|
|
|
|
* Unlocks the media in device dev. The media identifier should be set to
|
|
|
|
* -1, because the spec does not support any other value.
|
|
|
|
*
|
|
|
|
* Returns 0 on success or negative error code on failure.
|
|
|
|
*/
|
|
|
|
static int i2o_block_device_unlock(struct i2o_device *dev, u32 media_id)
|
|
|
|
{
|
2006-01-06 08:19:29 +00:00
|
|
|
struct i2o_message *msg;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
|
|
|
|
if (IS_ERR(msg))
|
|
|
|
return PTR_ERR(msg);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
|
|
|
|
msg->u.head[1] =
|
|
|
|
cpu_to_le32(I2O_CMD_BLOCK_MUNLOCK << 24 | HOST_TID << 12 | dev->
|
|
|
|
lct_data.tid);
|
|
|
|
msg->body[0] = cpu_to_le32(media_id);
|
2005-04-16 22:20:36 +00:00
|
|
|
osm_debug("Unlocking...\n");
|
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
return i2o_msg_post_wait(dev->iop, msg, 2);
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_device_power - Power management for device dev
|
|
|
|
* @dev: I2O device which should receive the power management request
|
2006-12-07 04:38:43 +00:00
|
|
|
* @op: Operation to send
|
2005-04-16 22:20:36 +00:00
|
|
|
*
|
|
|
|
* Send a power management request to the device dev.
|
|
|
|
*
|
|
|
|
* Returns 0 on success or negative error code on failure.
|
|
|
|
*/
|
|
|
|
static int i2o_block_device_power(struct i2o_block_device *dev, u8 op)
|
|
|
|
{
|
|
|
|
struct i2o_device *i2o_dev = dev->i2o_dev;
|
|
|
|
struct i2o_controller *c = i2o_dev->iop;
|
2006-01-06 08:19:29 +00:00
|
|
|
struct i2o_message *msg;
|
2005-04-16 22:20:36 +00:00
|
|
|
int rc;
|
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
|
|
|
|
if (IS_ERR(msg))
|
|
|
|
return PTR_ERR(msg);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0);
|
|
|
|
msg->u.head[1] =
|
|
|
|
cpu_to_le32(I2O_CMD_BLOCK_POWER << 24 | HOST_TID << 12 | i2o_dev->
|
|
|
|
lct_data.tid);
|
|
|
|
msg->body[0] = cpu_to_le32(op << 24);
|
2005-04-16 22:20:36 +00:00
|
|
|
osm_debug("Power...\n");
|
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
rc = i2o_msg_post_wait(c, msg, 60);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (!rc)
|
|
|
|
dev->power = op;
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_request_alloc - Allocate an I2O block request struct
|
|
|
|
*
|
|
|
|
* Allocates an I2O block request struct and initialize the list.
|
|
|
|
*
|
|
|
|
* Returns a i2o_block_request pointer on success or negative error code
|
|
|
|
* on failure.
|
|
|
|
*/
|
|
|
|
static inline struct i2o_block_request *i2o_block_request_alloc(void)
|
|
|
|
{
|
|
|
|
struct i2o_block_request *ireq;
|
|
|
|
|
|
|
|
ireq = mempool_alloc(i2o_blk_req_pool.pool, GFP_ATOMIC);
|
|
|
|
if (!ireq)
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
|
|
|
|
INIT_LIST_HEAD(&ireq->queue);
|
|
|
|
|
|
|
|
return ireq;
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_request_free - Frees a I2O block request
|
|
|
|
* @ireq: I2O block request which should be freed
|
|
|
|
*
|
2006-12-07 04:38:43 +00:00
|
|
|
* Frees the allocated memory (give it back to the request mempool).
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
|
|
|
static inline void i2o_block_request_free(struct i2o_block_request *ireq)
|
|
|
|
{
|
|
|
|
mempool_free(ireq, i2o_blk_req_pool.pool);
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_sglist_alloc - Allocate the SG list and map it
|
2005-06-24 05:02:16 +00:00
|
|
|
* @c: I2O controller to which the request belongs
|
2005-04-16 22:20:36 +00:00
|
|
|
* @ireq: I2O block request
|
2006-12-07 04:38:43 +00:00
|
|
|
* @mptr: message body pointer
|
2005-04-16 22:20:36 +00:00
|
|
|
*
|
2005-06-24 05:02:16 +00:00
|
|
|
* Builds the SG list and map it to be accessable by the controller.
|
2005-04-16 22:20:36 +00:00
|
|
|
*
|
2005-06-24 05:02:16 +00:00
|
|
|
* Returns 0 on failure or 1 on success.
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
2005-06-24 05:02:16 +00:00
|
|
|
static inline int i2o_block_sglist_alloc(struct i2o_controller *c,
|
|
|
|
struct i2o_block_request *ireq,
|
2006-01-06 08:19:29 +00:00
|
|
|
u32 ** mptr)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
int nents;
|
2005-06-24 05:02:16 +00:00
|
|
|
enum dma_data_direction direction;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:16 +00:00
|
|
|
ireq->dev = &c->pdev->dev;
|
2005-04-16 22:20:36 +00:00
|
|
|
nents = blk_rq_map_sg(ireq->req->q, ireq->req, ireq->sg_table);
|
|
|
|
|
|
|
|
if (rq_data_dir(ireq->req) == READ)
|
2005-06-24 05:02:16 +00:00
|
|
|
direction = PCI_DMA_FROMDEVICE;
|
2005-04-16 22:20:36 +00:00
|
|
|
else
|
2005-06-24 05:02:16 +00:00
|
|
|
direction = PCI_DMA_TODEVICE;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:16 +00:00
|
|
|
ireq->sg_nents = nents;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:16 +00:00
|
|
|
return i2o_dma_map_sg(c, ireq->sg_table, nents, direction, mptr);
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_sglist_free - Frees the SG list
|
|
|
|
* @ireq: I2O block request from which the SG should be freed
|
|
|
|
*
|
|
|
|
* Frees the SG list from the I2O block request.
|
|
|
|
*/
|
|
|
|
static inline void i2o_block_sglist_free(struct i2o_block_request *ireq)
|
|
|
|
{
|
2005-06-24 05:02:16 +00:00
|
|
|
enum dma_data_direction direction;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:16 +00:00
|
|
|
if (rq_data_dir(ireq->req) == READ)
|
|
|
|
direction = PCI_DMA_FROMDEVICE;
|
|
|
|
else
|
|
|
|
direction = PCI_DMA_TODEVICE;
|
|
|
|
|
|
|
|
dma_unmap_sg(ireq->dev, ireq->sg_table, ireq->sg_nents, direction);
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_prep_req_fn - Allocates I2O block device specific struct
|
|
|
|
* @q: request queue for the request
|
|
|
|
* @req: the request to prepare
|
|
|
|
*
|
|
|
|
* Allocate the necessary i2o_block_request struct and connect it to
|
|
|
|
* the request. This is needed that we not loose the SG list later on.
|
|
|
|
*
|
|
|
|
* Returns BLKPREP_OK on success or BLKPREP_DEFER on failure.
|
|
|
|
*/
|
|
|
|
static int i2o_block_prep_req_fn(struct request_queue *q, struct request *req)
|
|
|
|
{
|
|
|
|
struct i2o_block_device *i2o_blk_dev = q->queuedata;
|
|
|
|
struct i2o_block_request *ireq;
|
|
|
|
|
2005-06-24 05:02:16 +00:00
|
|
|
if (unlikely(!i2o_blk_dev)) {
|
|
|
|
osm_err("block device already removed\n");
|
|
|
|
return BLKPREP_KILL;
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/* connect the i2o_block_request to the request */
|
|
|
|
if (!req->special) {
|
|
|
|
ireq = i2o_block_request_alloc();
|
|
|
|
if (unlikely(IS_ERR(ireq))) {
|
|
|
|
osm_debug("unable to allocate i2o_block_request!\n");
|
|
|
|
return BLKPREP_DEFER;
|
|
|
|
}
|
|
|
|
|
|
|
|
ireq->i2o_blk_dev = i2o_blk_dev;
|
|
|
|
req->special = ireq;
|
|
|
|
ireq->req = req;
|
2007-03-27 05:32:30 +00:00
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
/* do not come back here */
|
2006-08-10 06:44:47 +00:00
|
|
|
req->cmd_flags |= REQ_DONTPREP;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
return BLKPREP_OK;
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_delayed_request_fn - delayed request queue function
|
2006-11-22 14:57:56 +00:00
|
|
|
* @work: the delayed request with the queue to start
|
2005-04-16 22:20:36 +00:00
|
|
|
*
|
|
|
|
* If the request queue is stopped for a disk, and there is no open
|
|
|
|
* request, a new event is created, which calls this function to start
|
|
|
|
* the queue after I2O_BLOCK_REQUEST_TIME. Otherwise the queue will never
|
|
|
|
* be started again.
|
|
|
|
*/
|
2006-11-22 14:57:56 +00:00
|
|
|
static void i2o_block_delayed_request_fn(struct work_struct *work)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2006-11-22 14:57:56 +00:00
|
|
|
struct i2o_block_delayed_request *dreq =
|
|
|
|
container_of(work, struct i2o_block_delayed_request,
|
|
|
|
work.work);
|
2005-04-16 22:20:36 +00:00
|
|
|
struct request_queue *q = dreq->queue;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(q->queue_lock, flags);
|
|
|
|
blk_start_queue(q);
|
|
|
|
spin_unlock_irqrestore(q->queue_lock, flags);
|
|
|
|
kfree(dreq);
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
2005-06-24 05:02:14 +00:00
|
|
|
* i2o_block_end_request - Post-processing of completed commands
|
|
|
|
* @req: request which should be completed
|
|
|
|
* @uptodate: 1 for success, 0 for I/O error, < 0 for specific error
|
|
|
|
* @nr_bytes: number of bytes to complete
|
2005-04-16 22:20:36 +00:00
|
|
|
*
|
2005-06-24 05:02:14 +00:00
|
|
|
* Mark the request as complete. The lock must not be held when entering.
|
2005-04-16 22:20:36 +00:00
|
|
|
*
|
|
|
|
*/
|
2005-06-24 05:02:14 +00:00
|
|
|
static void i2o_block_end_request(struct request *req, int uptodate,
|
|
|
|
int nr_bytes)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2005-06-24 05:02:14 +00:00
|
|
|
struct i2o_block_request *ireq = req->special;
|
|
|
|
struct i2o_block_device *dev = ireq->i2o_blk_dev;
|
2005-06-24 05:02:16 +00:00
|
|
|
request_queue_t *q = req->q;
|
2005-04-16 22:20:36 +00:00
|
|
|
unsigned long flags;
|
|
|
|
|
2005-06-24 05:02:14 +00:00
|
|
|
if (end_that_request_chunk(req, uptodate, nr_bytes)) {
|
2005-06-24 05:02:16 +00:00
|
|
|
int leftover = (req->hard_nr_sectors << KERNEL_SECTOR_SHIFT);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:14 +00:00
|
|
|
if (blk_pc_request(req))
|
|
|
|
leftover = req->data_len;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:14 +00:00
|
|
|
if (end_io_error(uptodate))
|
|
|
|
end_that_request_chunk(req, 0, leftover);
|
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:14 +00:00
|
|
|
add_disk_randomness(req->rq_disk);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:14 +00:00
|
|
|
spin_lock_irqsave(q->queue_lock, flags);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-06 08:49:03 +00:00
|
|
|
end_that_request_last(req, uptodate);
|
2005-06-24 05:02:16 +00:00
|
|
|
|
|
|
|
if (likely(dev)) {
|
|
|
|
dev->open_queue_depth--;
|
|
|
|
list_del(&ireq->queue);
|
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:14 +00:00
|
|
|
blk_start_queue(q);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:14 +00:00
|
|
|
spin_unlock_irqrestore(q->queue_lock, flags);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:14 +00:00
|
|
|
i2o_block_sglist_free(ireq);
|
|
|
|
i2o_block_request_free(ireq);
|
|
|
|
};
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:14 +00:00
|
|
|
/**
|
|
|
|
* i2o_block_reply - Block OSM reply handler.
|
|
|
|
* @c: I2O controller from which the message arrives
|
|
|
|
* @m: message id of reply
|
2006-12-07 04:38:43 +00:00
|
|
|
* @msg: the actual I2O message reply
|
2005-06-24 05:02:14 +00:00
|
|
|
*
|
|
|
|
* This function gets all the message replies.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
static int i2o_block_reply(struct i2o_controller *c, u32 m,
|
|
|
|
struct i2o_message *msg)
|
|
|
|
{
|
|
|
|
struct request *req;
|
|
|
|
int uptodate = 1;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
req = i2o_cntxt_list_get(c, le32_to_cpu(msg->u.s.tcntxt));
|
|
|
|
if (unlikely(!req)) {
|
|
|
|
osm_err("NULL reply received!\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Lets see what is cooking. We stuffed the
|
|
|
|
* request in the context.
|
|
|
|
*/
|
|
|
|
|
2005-06-24 05:02:14 +00:00
|
|
|
if ((le32_to_cpu(msg->body[0]) >> 24) != 0) {
|
|
|
|
u32 status = le32_to_cpu(msg->body[0]);
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* Device not ready means two things. One is that the
|
|
|
|
* the thing went offline (but not a removal media)
|
|
|
|
*
|
|
|
|
* The second is that you have a SuperTrak 100 and the
|
|
|
|
* firmware got constipated. Unlike standard i2o card
|
|
|
|
* setups the supertrak returns an error rather than
|
|
|
|
* blocking for the timeout in these cases.
|
|
|
|
*
|
|
|
|
* Don't stick a supertrak100 into cache aggressive modes
|
|
|
|
*/
|
|
|
|
|
2005-06-24 05:02:16 +00:00
|
|
|
osm_err("TID %03x error status: 0x%02x, detailed status: "
|
|
|
|
"0x%04x\n", (le32_to_cpu(msg->u.head[1]) >> 12 & 0xfff),
|
2005-06-24 05:02:14 +00:00
|
|
|
status >> 24, status & 0xffff);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:14 +00:00
|
|
|
req->errors++;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:14 +00:00
|
|
|
uptodate = 0;
|
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:14 +00:00
|
|
|
i2o_block_end_request(req, uptodate, le32_to_cpu(msg->body[1]));
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
return 1;
|
|
|
|
};
|
|
|
|
|
2006-11-22 14:57:56 +00:00
|
|
|
static void i2o_block_event(struct work_struct *work)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2006-11-22 14:57:56 +00:00
|
|
|
struct i2o_event *evt = container_of(work, struct i2o_event, work);
|
2005-06-24 05:02:21 +00:00
|
|
|
osm_debug("event received\n");
|
2005-06-14 05:58:00 +00:00
|
|
|
kfree(evt);
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* SCSI-CAM for ioctl geometry mapping
|
|
|
|
* Duplicated with SCSI - this should be moved into somewhere common
|
|
|
|
* perhaps genhd ?
|
|
|
|
*
|
|
|
|
* LBA -> CHS mapping table taken from:
|
|
|
|
*
|
|
|
|
* "Incorporating the I2O Architecture into BIOS for Intel Architecture
|
|
|
|
* Platforms"
|
|
|
|
*
|
|
|
|
* This is an I2O document that is only available to I2O members,
|
|
|
|
* not developers.
|
|
|
|
*
|
|
|
|
* From my understanding, this is how all the I2O cards do this
|
|
|
|
*
|
|
|
|
* Disk Size | Sectors | Heads | Cylinders
|
|
|
|
* ---------------+---------+-------+-------------------
|
|
|
|
* 1 < X <= 528M | 63 | 16 | X/(63 * 16 * 512)
|
|
|
|
* 528M < X <= 1G | 63 | 32 | X/(63 * 32 * 512)
|
|
|
|
* 1 < X <528M | 63 | 16 | X/(63 * 16 * 512)
|
|
|
|
* 1 < X <528M | 63 | 16 | X/(63 * 16 * 512)
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
#define BLOCK_SIZE_528M 1081344
|
|
|
|
#define BLOCK_SIZE_1G 2097152
|
|
|
|
#define BLOCK_SIZE_21G 4403200
|
|
|
|
#define BLOCK_SIZE_42G 8806400
|
|
|
|
#define BLOCK_SIZE_84G 17612800
|
|
|
|
|
|
|
|
static void i2o_block_biosparam(unsigned long capacity, unsigned short *cyls,
|
|
|
|
unsigned char *hds, unsigned char *secs)
|
|
|
|
{
|
|
|
|
unsigned long heads, sectors, cylinders;
|
|
|
|
|
|
|
|
sectors = 63L; /* Maximize sectors per track */
|
|
|
|
if (capacity <= BLOCK_SIZE_528M)
|
|
|
|
heads = 16;
|
|
|
|
else if (capacity <= BLOCK_SIZE_1G)
|
|
|
|
heads = 32;
|
|
|
|
else if (capacity <= BLOCK_SIZE_21G)
|
|
|
|
heads = 64;
|
|
|
|
else if (capacity <= BLOCK_SIZE_42G)
|
|
|
|
heads = 128;
|
|
|
|
else
|
|
|
|
heads = 255;
|
|
|
|
|
|
|
|
cylinders = (unsigned long)capacity / (heads * sectors);
|
|
|
|
|
|
|
|
*cyls = (unsigned short)cylinders; /* Stuff return values */
|
|
|
|
*secs = (unsigned char)sectors;
|
|
|
|
*hds = (unsigned char)heads;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_open - Open the block device
|
2006-12-07 04:38:43 +00:00
|
|
|
* @inode: inode for block device being opened
|
|
|
|
* @file: file to open
|
2005-04-16 22:20:36 +00:00
|
|
|
*
|
|
|
|
* Power up the device, mount and lock the media. This function is called,
|
|
|
|
* if the block device is opened for access.
|
|
|
|
*
|
|
|
|
* Returns 0 on success or negative error code on failure.
|
|
|
|
*/
|
|
|
|
static int i2o_block_open(struct inode *inode, struct file *file)
|
|
|
|
{
|
|
|
|
struct i2o_block_device *dev = inode->i_bdev->bd_disk->private_data;
|
|
|
|
|
|
|
|
if (!dev->i2o_dev)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
if (dev->power > 0x1f)
|
|
|
|
i2o_block_device_power(dev, 0x02);
|
|
|
|
|
|
|
|
i2o_block_device_mount(dev->i2o_dev, -1);
|
|
|
|
|
|
|
|
i2o_block_device_lock(dev->i2o_dev, -1);
|
|
|
|
|
|
|
|
osm_debug("Ready.\n");
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_release - Release the I2O block device
|
2006-12-07 04:38:43 +00:00
|
|
|
* @inode: inode for block device being released
|
|
|
|
* @file: file to close
|
2005-04-16 22:20:36 +00:00
|
|
|
*
|
|
|
|
* Unlock and unmount the media, and power down the device. Gets called if
|
|
|
|
* the block device is closed.
|
|
|
|
*
|
|
|
|
* Returns 0 on success or negative error code on failure.
|
|
|
|
*/
|
|
|
|
static int i2o_block_release(struct inode *inode, struct file *file)
|
|
|
|
{
|
|
|
|
struct gendisk *disk = inode->i_bdev->bd_disk;
|
|
|
|
struct i2o_block_device *dev = disk->private_data;
|
|
|
|
u8 operation;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is to deail with the case of an application
|
|
|
|
* opening a device and then the device dissapears while
|
|
|
|
* it's in use, and then the application tries to release
|
|
|
|
* it. ex: Unmounting a deleted RAID volume at reboot.
|
|
|
|
* If we send messages, it will just cause FAILs since
|
|
|
|
* the TID no longer exists.
|
|
|
|
*/
|
|
|
|
if (!dev->i2o_dev)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
i2o_block_device_flush(dev->i2o_dev);
|
|
|
|
|
|
|
|
i2o_block_device_unlock(dev->i2o_dev, -1);
|
|
|
|
|
|
|
|
if (dev->flags & (1 << 3 | 1 << 4)) /* Removable */
|
|
|
|
operation = 0x21;
|
|
|
|
else
|
|
|
|
operation = 0x24;
|
|
|
|
|
|
|
|
i2o_block_device_power(dev, operation);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2006-01-08 09:02:50 +00:00
|
|
|
static int i2o_block_getgeo(struct block_device *bdev, struct hd_geometry *geo)
|
|
|
|
{
|
|
|
|
i2o_block_biosparam(get_capacity(bdev->bd_disk),
|
|
|
|
&geo->cylinders, &geo->heads, &geo->sectors);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/**
|
|
|
|
* i2o_block_ioctl - Issue device specific ioctl calls.
|
2006-12-07 04:38:43 +00:00
|
|
|
* @inode: inode for block device ioctl
|
|
|
|
* @file: file for ioctl
|
2005-04-16 22:20:36 +00:00
|
|
|
* @cmd: ioctl command
|
|
|
|
* @arg: arg
|
|
|
|
*
|
|
|
|
* Handles ioctl request for the block device.
|
|
|
|
*
|
|
|
|
* Return 0 on success or negative error on failure.
|
|
|
|
*/
|
|
|
|
static int i2o_block_ioctl(struct inode *inode, struct file *file,
|
|
|
|
unsigned int cmd, unsigned long arg)
|
|
|
|
{
|
|
|
|
struct gendisk *disk = inode->i_bdev->bd_disk;
|
|
|
|
struct i2o_block_device *dev = disk->private_data;
|
|
|
|
|
|
|
|
/* Anyone capable of this syscall can do *real bad* things */
|
|
|
|
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
|
|
return -EPERM;
|
|
|
|
|
|
|
|
switch (cmd) {
|
|
|
|
case BLKI2OGRSTRAT:
|
|
|
|
return put_user(dev->rcache, (int __user *)arg);
|
|
|
|
case BLKI2OGWSTRAT:
|
|
|
|
return put_user(dev->wcache, (int __user *)arg);
|
|
|
|
case BLKI2OSRSTRAT:
|
|
|
|
if (arg < 0 || arg > CACHE_SMARTFETCH)
|
|
|
|
return -EINVAL;
|
|
|
|
dev->rcache = arg;
|
|
|
|
break;
|
|
|
|
case BLKI2OSWSTRAT:
|
|
|
|
if (arg != 0
|
|
|
|
&& (arg < CACHE_WRITETHROUGH || arg > CACHE_SMARTBACK))
|
|
|
|
return -EINVAL;
|
|
|
|
dev->wcache = arg;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return -ENOTTY;
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_media_changed - Have we seen a media change?
|
|
|
|
* @disk: gendisk which should be verified
|
|
|
|
*
|
|
|
|
* Verifies if the media has changed.
|
|
|
|
*
|
|
|
|
* Returns 1 if the media was changed or 0 otherwise.
|
|
|
|
*/
|
|
|
|
static int i2o_block_media_changed(struct gendisk *disk)
|
|
|
|
{
|
|
|
|
struct i2o_block_device *p = disk->private_data;
|
|
|
|
|
|
|
|
if (p->media_change_flag) {
|
|
|
|
p->media_change_flag = 0;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_transfer - Transfer a request to/from the I2O controller
|
|
|
|
* @req: the request which should be transfered
|
|
|
|
*
|
|
|
|
* This function converts the request into a I2O message. The necessary
|
|
|
|
* DMA buffers are allocated and after everything is setup post the message
|
|
|
|
* to the I2O controller. No cleanup is done by this function. It is done
|
|
|
|
* on the interrupt side when the reply arrives.
|
|
|
|
*
|
|
|
|
* Return 0 on success or negative error code on failure.
|
|
|
|
*/
|
|
|
|
static int i2o_block_transfer(struct request *req)
|
|
|
|
{
|
|
|
|
struct i2o_block_device *dev = req->rq_disk->private_data;
|
2005-06-24 05:02:16 +00:00
|
|
|
struct i2o_controller *c;
|
2005-04-16 22:20:36 +00:00
|
|
|
int tid = dev->i2o_dev->lct_data.tid;
|
2006-01-06 08:19:29 +00:00
|
|
|
struct i2o_message *msg;
|
|
|
|
u32 *mptr;
|
2005-04-16 22:20:36 +00:00
|
|
|
struct i2o_block_request *ireq = req->special;
|
|
|
|
u32 tcntxt;
|
2005-06-24 05:02:16 +00:00
|
|
|
u32 sgl_offset = SGL_OFFSET_8;
|
|
|
|
u32 ctl_flags = 0x00000000;
|
2005-04-16 22:20:36 +00:00
|
|
|
int rc;
|
2005-06-24 05:02:16 +00:00
|
|
|
u32 cmd;
|
|
|
|
|
|
|
|
if (unlikely(!dev->i2o_dev)) {
|
|
|
|
osm_err("transfer to removed drive\n");
|
|
|
|
rc = -ENODEV;
|
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
|
|
|
|
c = dev->i2o_dev->iop;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
msg = i2o_msg_get(c);
|
|
|
|
if (IS_ERR(msg)) {
|
|
|
|
rc = PTR_ERR(msg);
|
2005-04-16 22:20:36 +00:00
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
|
|
|
|
tcntxt = i2o_cntxt_list_add(c, req);
|
|
|
|
if (!tcntxt) {
|
|
|
|
rc = -ENOMEM;
|
|
|
|
goto nop_msg;
|
|
|
|
}
|
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
msg->u.s.icntxt = cpu_to_le32(i2o_block_driver.context);
|
|
|
|
msg->u.s.tcntxt = cpu_to_le32(tcntxt);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:16 +00:00
|
|
|
mptr = &msg->body[0];
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
if (rq_data_dir(req) == READ) {
|
2005-06-24 05:02:16 +00:00
|
|
|
cmd = I2O_CMD_BLOCK_READ << 24;
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
switch (dev->rcache) {
|
|
|
|
case CACHE_PREFETCH:
|
2005-06-24 05:02:16 +00:00
|
|
|
ctl_flags = 0x201F0008;
|
2005-04-16 22:20:36 +00:00
|
|
|
break;
|
2005-06-24 05:02:16 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
case CACHE_SMARTFETCH:
|
|
|
|
if (req->nr_sectors > 16)
|
2005-06-24 05:02:16 +00:00
|
|
|
ctl_flags = 0x201F0008;
|
2005-04-16 22:20:36 +00:00
|
|
|
else
|
2005-06-24 05:02:16 +00:00
|
|
|
ctl_flags = 0x001F0000;
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
2005-04-16 22:20:36 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
} else {
|
2005-06-24 05:02:16 +00:00
|
|
|
cmd = I2O_CMD_BLOCK_WRITE << 24;
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
switch (dev->wcache) {
|
|
|
|
case CACHE_WRITETHROUGH:
|
2005-06-24 05:02:16 +00:00
|
|
|
ctl_flags = 0x001F0008;
|
2005-04-16 22:20:36 +00:00
|
|
|
break;
|
|
|
|
case CACHE_WRITEBACK:
|
2005-06-24 05:02:16 +00:00
|
|
|
ctl_flags = 0x001F0010;
|
2005-04-16 22:20:36 +00:00
|
|
|
break;
|
|
|
|
case CACHE_SMARTBACK:
|
|
|
|
if (req->nr_sectors > 16)
|
2005-06-24 05:02:16 +00:00
|
|
|
ctl_flags = 0x001F0004;
|
2005-04-16 22:20:36 +00:00
|
|
|
else
|
2005-06-24 05:02:16 +00:00
|
|
|
ctl_flags = 0x001F0010;
|
2005-04-16 22:20:36 +00:00
|
|
|
break;
|
|
|
|
case CACHE_SMARTTHROUGH:
|
|
|
|
if (req->nr_sectors > 16)
|
2005-06-24 05:02:16 +00:00
|
|
|
ctl_flags = 0x001F0004;
|
2005-04-16 22:20:36 +00:00
|
|
|
else
|
2005-06-24 05:02:16 +00:00
|
|
|
ctl_flags = 0x001F0010;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_I2O_EXT_ADAPTEC
|
|
|
|
if (c->adaptec) {
|
|
|
|
u8 cmd[10];
|
|
|
|
u32 scsi_flags;
|
|
|
|
u16 hwsec = queue_hardsect_size(req->q) >> KERNEL_SECTOR_SHIFT;
|
|
|
|
|
|
|
|
memset(cmd, 0, 10);
|
|
|
|
|
|
|
|
sgl_offset = SGL_OFFSET_12;
|
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
msg->u.head[1] =
|
|
|
|
cpu_to_le32(I2O_CMD_PRIVATE << 24 | HOST_TID << 12 | tid);
|
2005-06-24 05:02:16 +00:00
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
*mptr++ = cpu_to_le32(I2O_VENDOR_DPT << 16 | I2O_CMD_SCSI_EXEC);
|
|
|
|
*mptr++ = cpu_to_le32(tid);
|
2005-06-24 05:02:16 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* ENABLE_DISCONNECT
|
|
|
|
* SIMPLE_TAG
|
|
|
|
* RETURN_SENSE_DATA_IN_REPLY_MESSAGE_FRAME
|
|
|
|
*/
|
|
|
|
if (rq_data_dir(req) == READ) {
|
2006-01-06 08:19:32 +00:00
|
|
|
cmd[0] = READ_10;
|
2005-06-24 05:02:16 +00:00
|
|
|
scsi_flags = 0x60a0000a;
|
|
|
|
} else {
|
2006-01-06 08:19:32 +00:00
|
|
|
cmd[0] = WRITE_10;
|
2005-06-24 05:02:16 +00:00
|
|
|
scsi_flags = 0xa0a0000a;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
2005-06-24 05:02:16 +00:00
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
*mptr++ = cpu_to_le32(scsi_flags);
|
2005-06-24 05:02:16 +00:00
|
|
|
|
|
|
|
*((u32 *) & cmd[2]) = cpu_to_be32(req->sector * hwsec);
|
|
|
|
*((u16 *) & cmd[7]) = cpu_to_be16(req->nr_sectors * hwsec);
|
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
memcpy(mptr, cmd, 10);
|
2005-06-24 05:02:16 +00:00
|
|
|
mptr += 4;
|
2006-01-06 08:19:29 +00:00
|
|
|
*mptr++ = cpu_to_le32(req->nr_sectors << KERNEL_SECTOR_SHIFT);
|
2005-06-24 05:02:16 +00:00
|
|
|
} else
|
|
|
|
#endif
|
|
|
|
{
|
2006-01-06 08:19:29 +00:00
|
|
|
msg->u.head[1] = cpu_to_le32(cmd | HOST_TID << 12 | tid);
|
|
|
|
*mptr++ = cpu_to_le32(ctl_flags);
|
|
|
|
*mptr++ = cpu_to_le32(req->nr_sectors << KERNEL_SECTOR_SHIFT);
|
|
|
|
*mptr++ =
|
|
|
|
cpu_to_le32((u32) (req->sector << KERNEL_SECTOR_SHIFT));
|
|
|
|
*mptr++ =
|
|
|
|
cpu_to_le32(req->sector >> (32 - KERNEL_SECTOR_SHIFT));
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2005-06-24 05:02:16 +00:00
|
|
|
if (!i2o_block_sglist_alloc(c, ireq, &mptr)) {
|
|
|
|
rc = -ENOMEM;
|
|
|
|
goto context_remove;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
msg->u.head[0] =
|
|
|
|
cpu_to_le32(I2O_MESSAGE_SIZE(mptr - &msg->u.head[0]) | sgl_offset);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
list_add_tail(&ireq->queue, &dev->open_queue);
|
|
|
|
dev->open_queue_depth++;
|
|
|
|
|
2006-01-06 08:19:29 +00:00
|
|
|
i2o_msg_post(c, msg);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
context_remove:
|
|
|
|
i2o_cntxt_list_remove(c, req);
|
|
|
|
|
|
|
|
nop_msg:
|
2006-01-06 08:19:29 +00:00
|
|
|
i2o_msg_nop(c, msg);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
exit:
|
|
|
|
return rc;
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_request_fn - request queue handling function
|
2006-12-07 04:38:43 +00:00
|
|
|
* @q: request queue from which the request could be fetched
|
2005-04-16 22:20:36 +00:00
|
|
|
*
|
|
|
|
* Takes the next request from the queue, transfers it and if no error
|
|
|
|
* occurs dequeue it from the queue. On arrival of the reply the message
|
|
|
|
* will be processed further. If an error occurs requeue the request.
|
|
|
|
*/
|
|
|
|
static void i2o_block_request_fn(struct request_queue *q)
|
|
|
|
{
|
|
|
|
struct request *req;
|
|
|
|
|
|
|
|
while (!blk_queue_plugged(q)) {
|
|
|
|
req = elv_next_request(q);
|
|
|
|
if (!req)
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (blk_fs_request(req)) {
|
|
|
|
struct i2o_block_delayed_request *dreq;
|
|
|
|
struct i2o_block_request *ireq = req->special;
|
|
|
|
unsigned int queue_depth;
|
|
|
|
|
|
|
|
queue_depth = ireq->i2o_blk_dev->open_queue_depth;
|
|
|
|
|
2005-06-24 05:02:16 +00:00
|
|
|
if (queue_depth < I2O_BLOCK_MAX_OPEN_REQUESTS) {
|
2005-04-16 22:20:36 +00:00
|
|
|
if (!i2o_block_transfer(req)) {
|
|
|
|
blkdev_dequeue_request(req);
|
|
|
|
continue;
|
2005-06-24 05:02:16 +00:00
|
|
|
} else
|
|
|
|
osm_info("transfer error\n");
|
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
if (queue_depth)
|
|
|
|
break;
|
|
|
|
|
|
|
|
/* stop the queue and retry later */
|
|
|
|
dreq = kmalloc(sizeof(*dreq), GFP_ATOMIC);
|
|
|
|
if (!dreq)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
dreq->queue = q;
|
2006-11-22 14:57:56 +00:00
|
|
|
INIT_DELAYED_WORK(&dreq->work,
|
|
|
|
i2o_block_delayed_request_fn);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
if (!queue_delayed_work(i2o_block_driver.event_queue,
|
|
|
|
&dreq->work,
|
|
|
|
I2O_BLOCK_RETRY_TIME))
|
|
|
|
kfree(dreq);
|
|
|
|
else {
|
|
|
|
blk_stop_queue(q);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
} else
|
|
|
|
end_request(req, 0);
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
/* I2O Block device operations definition */
|
|
|
|
static struct block_device_operations i2o_block_fops = {
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.open = i2o_block_open,
|
|
|
|
.release = i2o_block_release,
|
|
|
|
.ioctl = i2o_block_ioctl,
|
2006-01-08 09:02:50 +00:00
|
|
|
.getgeo = i2o_block_getgeo,
|
2005-04-16 22:20:36 +00:00
|
|
|
.media_changed = i2o_block_media_changed
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_device_alloc - Allocate memory for a I2O Block device
|
|
|
|
*
|
|
|
|
* Allocate memory for the i2o_block_device struct, gendisk and request
|
|
|
|
* queue and initialize them as far as no additional information is needed.
|
|
|
|
*
|
|
|
|
* Returns a pointer to the allocated I2O Block device on succes or a
|
|
|
|
* negative error code on failure.
|
|
|
|
*/
|
|
|
|
static struct i2o_block_device *i2o_block_device_alloc(void)
|
|
|
|
{
|
|
|
|
struct i2o_block_device *dev;
|
|
|
|
struct gendisk *gd;
|
|
|
|
struct request_queue *queue;
|
|
|
|
int rc;
|
|
|
|
|
2006-01-06 08:19:33 +00:00
|
|
|
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (!dev) {
|
|
|
|
osm_err("Insufficient memory to allocate I2O Block disk.\n");
|
|
|
|
rc = -ENOMEM;
|
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
|
|
|
|
INIT_LIST_HEAD(&dev->open_queue);
|
|
|
|
spin_lock_init(&dev->lock);
|
|
|
|
dev->rcache = CACHE_PREFETCH;
|
|
|
|
dev->wcache = CACHE_WRITEBACK;
|
|
|
|
|
|
|
|
/* allocate a gendisk with 16 partitions */
|
|
|
|
gd = alloc_disk(16);
|
|
|
|
if (!gd) {
|
|
|
|
osm_err("Insufficient memory to allocate gendisk.\n");
|
|
|
|
rc = -ENOMEM;
|
|
|
|
goto cleanup_dev;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* initialize the request queue */
|
|
|
|
queue = blk_init_queue(i2o_block_request_fn, &dev->lock);
|
|
|
|
if (!queue) {
|
|
|
|
osm_err("Insufficient memory to allocate request queue.\n");
|
|
|
|
rc = -ENOMEM;
|
|
|
|
goto cleanup_queue;
|
|
|
|
}
|
|
|
|
|
|
|
|
blk_queue_prep_rq(queue, i2o_block_prep_req_fn);
|
2005-06-24 05:02:16 +00:00
|
|
|
blk_queue_issue_flush_fn(queue, i2o_block_issue_flush);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
gd->major = I2O_MAJOR;
|
|
|
|
gd->queue = queue;
|
|
|
|
gd->fops = &i2o_block_fops;
|
|
|
|
gd->private_data = dev;
|
|
|
|
|
|
|
|
dev->gd = gd;
|
|
|
|
|
|
|
|
return dev;
|
|
|
|
|
|
|
|
cleanup_queue:
|
|
|
|
put_disk(gd);
|
|
|
|
|
|
|
|
cleanup_dev:
|
|
|
|
kfree(dev);
|
|
|
|
|
|
|
|
exit:
|
|
|
|
return ERR_PTR(rc);
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_probe - verify if dev is a I2O Block device and install it
|
|
|
|
* @dev: device to verify if it is a I2O Block device
|
|
|
|
*
|
|
|
|
* We only verify if the user_tid of the device is 0xfff and then install
|
|
|
|
* the device. Otherwise it is used by some other device (e. g. RAID).
|
|
|
|
*
|
|
|
|
* Returns 0 on success or negative error code on failure.
|
|
|
|
*/
|
|
|
|
static int i2o_block_probe(struct device *dev)
|
|
|
|
{
|
|
|
|
struct i2o_device *i2o_dev = to_i2o_device(dev);
|
|
|
|
struct i2o_controller *c = i2o_dev->iop;
|
2005-06-24 05:02:23 +00:00
|
|
|
struct i2o_block_device *i2o_blk_dev;
|
2005-04-16 22:20:36 +00:00
|
|
|
struct gendisk *gd;
|
|
|
|
struct request_queue *queue;
|
|
|
|
static int unit = 0;
|
|
|
|
int rc;
|
|
|
|
u64 size;
|
|
|
|
u32 blocksize;
|
2005-06-24 05:02:16 +00:00
|
|
|
u16 body_size = 4;
|
2006-01-06 08:19:30 +00:00
|
|
|
u16 power;
|
2005-06-24 05:02:16 +00:00
|
|
|
unsigned short max_sectors;
|
|
|
|
|
|
|
|
#ifdef CONFIG_I2O_EXT_ADAPTEC
|
|
|
|
if (c->adaptec)
|
|
|
|
body_size = 8;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
if (c->limit_sectors)
|
|
|
|
max_sectors = I2O_MAX_SECTORS_LIMITED;
|
|
|
|
else
|
|
|
|
max_sectors = I2O_MAX_SECTORS;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
/* skip devices which are used by IOP */
|
|
|
|
if (i2o_dev->lct_data.user_tid != 0xfff) {
|
|
|
|
osm_debug("skipping used device %03x\n", i2o_dev->lct_data.tid);
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (i2o_device_claim(i2o_dev)) {
|
|
|
|
osm_warn("Unable to claim device. Installation aborted\n");
|
|
|
|
rc = -EFAULT;
|
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
|
|
|
|
i2o_blk_dev = i2o_block_device_alloc();
|
|
|
|
if (IS_ERR(i2o_blk_dev)) {
|
|
|
|
osm_err("could not alloc a new I2O block device");
|
|
|
|
rc = PTR_ERR(i2o_blk_dev);
|
|
|
|
goto claim_release;
|
|
|
|
}
|
|
|
|
|
|
|
|
i2o_blk_dev->i2o_dev = i2o_dev;
|
|
|
|
dev_set_drvdata(dev, i2o_blk_dev);
|
|
|
|
|
|
|
|
/* setup gendisk */
|
|
|
|
gd = i2o_blk_dev->gd;
|
|
|
|
gd->first_minor = unit << 4;
|
|
|
|
sprintf(gd->disk_name, "i2o/hd%c", 'a' + unit);
|
|
|
|
gd->driverfs_dev = &i2o_dev->device;
|
|
|
|
|
|
|
|
/* setup request queue */
|
|
|
|
queue = gd->queue;
|
|
|
|
queue->queuedata = i2o_blk_dev;
|
|
|
|
|
2005-06-24 05:02:16 +00:00
|
|
|
blk_queue_max_phys_segments(queue, I2O_MAX_PHYS_SEGMENTS);
|
|
|
|
blk_queue_max_sectors(queue, max_sectors);
|
|
|
|
blk_queue_max_hw_segments(queue, i2o_sg_tablesize(c, body_size));
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-24 05:02:16 +00:00
|
|
|
osm_debug("max sectors = %d\n", queue->max_phys_segments);
|
|
|
|
osm_debug("phys segments = %d\n", queue->max_sectors);
|
|
|
|
osm_debug("max hw segments = %d\n", queue->max_hw_segments);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Ask for the current media data. If that isn't supported
|
|
|
|
* then we ask for the device capacity data
|
|
|
|
*/
|
2006-01-06 08:19:30 +00:00
|
|
|
if (!i2o_parm_field_get(i2o_dev, 0x0004, 1, &blocksize, 4) ||
|
|
|
|
!i2o_parm_field_get(i2o_dev, 0x0000, 3, &blocksize, 4)) {
|
|
|
|
blk_queue_hardsect_size(queue, le32_to_cpu(blocksize));
|
2005-06-24 05:02:16 +00:00
|
|
|
} else
|
|
|
|
osm_warn("unable to get blocksize of %s\n", gd->disk_name);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-06 08:19:30 +00:00
|
|
|
if (!i2o_parm_field_get(i2o_dev, 0x0004, 0, &size, 8) ||
|
|
|
|
!i2o_parm_field_get(i2o_dev, 0x0000, 4, &size, 8)) {
|
|
|
|
set_capacity(gd, le64_to_cpu(size) >> KERNEL_SECTOR_SHIFT);
|
2005-06-24 05:02:16 +00:00
|
|
|
} else
|
|
|
|
osm_warn("could not get size of %s\n", gd->disk_name);
|
2005-06-24 05:02:14 +00:00
|
|
|
|
2006-01-06 08:19:30 +00:00
|
|
|
if (!i2o_parm_field_get(i2o_dev, 0x0000, 2, &power, 2))
|
|
|
|
i2o_blk_dev->power = power;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
i2o_event_register(i2o_dev, &i2o_block_driver, 0, 0xffffffff);
|
|
|
|
|
|
|
|
add_disk(gd);
|
|
|
|
|
|
|
|
unit++;
|
|
|
|
|
2005-06-24 05:02:14 +00:00
|
|
|
osm_info("device added (TID: %03x): %s\n", i2o_dev->lct_data.tid,
|
|
|
|
i2o_blk_dev->gd->disk_name);
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
claim_release:
|
|
|
|
i2o_device_claim_release(i2o_dev);
|
|
|
|
|
|
|
|
exit:
|
|
|
|
return rc;
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Block OSM driver struct */
|
|
|
|
static struct i2o_driver i2o_block_driver = {
|
|
|
|
.name = OSM_NAME,
|
|
|
|
.event = i2o_block_event,
|
|
|
|
.reply = i2o_block_reply,
|
|
|
|
.classes = i2o_block_class_id,
|
|
|
|
.driver = {
|
|
|
|
.probe = i2o_block_probe,
|
|
|
|
.remove = i2o_block_remove,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_init - Block OSM initialization function
|
|
|
|
*
|
|
|
|
* Allocate the slab and mempool for request structs, registers i2o_block
|
|
|
|
* block device and finally register the Block OSM in the I2O core.
|
|
|
|
*
|
|
|
|
* Returns 0 on success or negative error code on failure.
|
|
|
|
*/
|
|
|
|
static int __init i2o_block_init(void)
|
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
int size;
|
|
|
|
|
|
|
|
printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n");
|
|
|
|
|
|
|
|
/* Allocate request mempool and slab */
|
|
|
|
size = sizeof(struct i2o_block_request);
|
|
|
|
i2o_blk_req_pool.slab = kmem_cache_create("i2o_block_req", size, 0,
|
2007-07-20 01:11:58 +00:00
|
|
|
SLAB_HWCACHE_ALIGN, NULL);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (!i2o_blk_req_pool.slab) {
|
|
|
|
osm_err("can't init request slab\n");
|
|
|
|
rc = -ENOMEM;
|
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
|
2006-03-26 09:37:50 +00:00
|
|
|
i2o_blk_req_pool.pool =
|
|
|
|
mempool_create_slab_pool(I2O_BLOCK_REQ_MEMPOOL_SIZE,
|
|
|
|
i2o_blk_req_pool.slab);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (!i2o_blk_req_pool.pool) {
|
|
|
|
osm_err("can't init request mempool\n");
|
|
|
|
rc = -ENOMEM;
|
|
|
|
goto free_slab;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Register the block device interfaces */
|
|
|
|
rc = register_blkdev(I2O_MAJOR, "i2o_block");
|
|
|
|
if (rc) {
|
|
|
|
osm_err("unable to register block device\n");
|
|
|
|
goto free_mempool;
|
|
|
|
}
|
|
|
|
#ifdef MODULE
|
|
|
|
osm_info("registered device at major %d\n", I2O_MAJOR);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Register Block OSM into I2O core */
|
|
|
|
rc = i2o_driver_register(&i2o_block_driver);
|
|
|
|
if (rc) {
|
|
|
|
osm_err("Could not register Block driver\n");
|
|
|
|
goto unregister_blkdev;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
unregister_blkdev:
|
|
|
|
unregister_blkdev(I2O_MAJOR, "i2o_block");
|
|
|
|
|
|
|
|
free_mempool:
|
|
|
|
mempool_destroy(i2o_blk_req_pool.pool);
|
|
|
|
|
|
|
|
free_slab:
|
|
|
|
kmem_cache_destroy(i2o_blk_req_pool.slab);
|
|
|
|
|
|
|
|
exit:
|
|
|
|
return rc;
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* i2o_block_exit - Block OSM exit function
|
|
|
|
*
|
|
|
|
* Unregisters Block OSM from I2O core, unregisters i2o_block block device
|
|
|
|
* and frees the mempool and slab.
|
|
|
|
*/
|
|
|
|
static void __exit i2o_block_exit(void)
|
|
|
|
{
|
|
|
|
/* Unregister I2O Block OSM from I2O core */
|
|
|
|
i2o_driver_unregister(&i2o_block_driver);
|
|
|
|
|
|
|
|
/* Unregister block device */
|
|
|
|
unregister_blkdev(I2O_MAJOR, "i2o_block");
|
|
|
|
|
|
|
|
/* Free request mempool and slab */
|
|
|
|
mempool_destroy(i2o_blk_req_pool.pool);
|
|
|
|
kmem_cache_destroy(i2o_blk_req_pool.slab);
|
|
|
|
};
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Red Hat");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_DESCRIPTION(OSM_DESCRIPTION);
|
|
|
|
MODULE_VERSION(OSM_VERSION);
|
|
|
|
|
|
|
|
module_init(i2o_block_init);
|
|
|
|
module_exit(i2o_block_exit);
|