| /* | |
| * Block OSM structures/API | |
| * | |
| * 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. | |
| */ | |
| #ifndef I2O_BLOCK_OSM_H | |
| #define I2O_BLOCK_OSM_H | |
| #define I2O_BLOCK_RETRY_TIME HZ/4 | |
| #define I2O_BLOCK_MAX_OPEN_REQUESTS 50 | |
| /* request queue sizes */ | |
| #define I2O_BLOCK_REQ_MEMPOOL_SIZE 32 | |
| #define KERNEL_SECTOR_SHIFT 9 | |
| #define KERNEL_SECTOR_SIZE (1 << KERNEL_SECTOR_SHIFT) | |
| /* I2O Block OSM mempool struct */ | |
| struct i2o_block_mempool { | |
| struct kmem_cache *slab; | |
| mempool_t *pool; | |
| }; | |
| /* I2O Block device descriptor */ | |
| struct i2o_block_device { | |
| struct i2o_device *i2o_dev; /* pointer to I2O device */ | |
| struct gendisk *gd; | |
| spinlock_t lock; /* queue lock */ | |
| struct list_head open_queue; /* list of transfered, but unfinished | |
| requests */ | |
| unsigned int open_queue_depth; /* number of requests in the queue */ | |
| int rcache; /* read cache flags */ | |
| int wcache; /* write cache flags */ | |
| int flags; | |
| u16 power; /* power state */ | |
| int media_change_flag; /* media changed flag */ | |
| }; | |
| /* I2O Block device request */ | |
| struct i2o_block_request { | |
| struct list_head queue; | |
| struct request *req; /* corresponding request */ | |
| struct i2o_block_device *i2o_blk_dev; /* I2O block device */ | |
| struct device *dev; /* device used for DMA */ | |
| int sg_nents; /* number of SG elements */ | |
| struct scatterlist sg_table[I2O_MAX_PHYS_SEGMENTS]; /* SG table */ | |
| }; | |
| /* I2O Block device delayed request */ | |
| struct i2o_block_delayed_request { | |
| struct delayed_work work; | |
| struct request_queue *queue; | |
| }; | |
| #endif |