| /* |
| * 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 |
| |
| /* I2O Block OSM mempool struct */ |
| struct i2o_block_mempool { |
| kmem_cache_t *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 */ |
| int sg_dma_direction; /* direction of DMA buffer read/write */ |
| int sg_nents; /* number of SG elements */ |
| struct scatterlist sg_table[I2O_MAX_SEGMENTS]; /* SG table */ |
| }; |
| |
| /* I2O Block device delayed request */ |
| struct i2o_block_delayed_request |
| { |
| struct work_struct work; |
| struct request_queue *queue; |
| }; |
| |
| #endif |