projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| a6a8d9f8 CS |
1 | /* |
| 2 | * Header file for SCSI device handler infrastruture. | |
| 3 | * | |
| 4 | * Modified version of patches posted by Mike Christie <[email protected]> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify it | |
| 7 | * under the terms of the GNU General Public License as published by the | |
| 8 | * Free Software Foundation; either version 2 of the License, or (at your | |
| 9 | * option) any later version. | |
| 10 | * | |
| 11 | * This program is distributed in the hope that it will be useful, but | |
| 12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | * General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU General Public License along | |
| 17 | * with this program; if not, write to the Free Software Foundation, Inc., | |
| 18 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 19 | * | |
| 20 | * Copyright IBM Corporation, 2007 | |
| 21 | * Authors: | |
| 22 | * Chandra Seetharaman <[email protected]> | |
| 23 | * Mike Anderson <[email protected]> | |
| 24 | */ | |
| 25 | ||
| 26 | #include <scsi/scsi_device.h> | |
| 27 | ||
| 28 | enum { | |
| 29 | SCSI_DH_OK = 0, | |
| 30 | /* | |
| 31 | * device errors | |
| 32 | */ | |
| 33 | SCSI_DH_DEV_FAILED, /* generic device error */ | |
| 34 | SCSI_DH_DEV_TEMP_BUSY, | |
| b6ff1b14 | 35 | SCSI_DH_DEV_UNSUPP, /* device handler not supported */ |
| a6a8d9f8 CS |
36 | SCSI_DH_DEVICE_MAX, /* max device blkerr definition */ |
| 37 | ||
| 38 | /* | |
| 39 | * transport errors | |
| 40 | */ | |
| 41 | SCSI_DH_NOTCONN = SCSI_DH_DEVICE_MAX + 1, | |
| 42 | SCSI_DH_CONN_FAILURE, | |
| 43 | SCSI_DH_TRANSPORT_MAX, /* max transport blkerr definition */ | |
| 44 | ||
| 45 | /* | |
| 46 | * driver and generic errors | |
| 47 | */ | |
| 48 | SCSI_DH_IO = SCSI_DH_TRANSPORT_MAX + 1, /* generic error */ | |
| 49 | SCSI_DH_INVALID_IO, | |
| 50 | SCSI_DH_RETRY, /* retry the req, but not immediately */ | |
| 51 | SCSI_DH_IMM_RETRY, /* immediately retry the req */ | |
| 52 | SCSI_DH_TIMED_OUT, | |
| 53 | SCSI_DH_RES_TEMP_UNAVAIL, | |
| 54 | SCSI_DH_DEV_OFFLINED, | |
| 55 | SCSI_DH_NOSYS, | |
| 56 | SCSI_DH_DRIVER_MAX, | |
| 57 | }; | |
| fe9233fb | 58 | #if defined(CONFIG_SCSI_DH) || defined(CONFIG_SCSI_DH_MODULE) |
| 3ae31f6a | 59 | extern int scsi_dh_activate(struct request_queue *, activate_complete, void *); |
| a6a8d9f8 | 60 | extern int scsi_dh_handler_exist(const char *); |
| ae11b1b3 HR |
61 | extern int scsi_dh_attach(struct request_queue *, const char *); |
| 62 | extern void scsi_dh_detach(struct request_queue *); | |
| 18ee70c9 | 63 | extern int scsi_dh_set_params(struct request_queue *, const char *); |
| fe9233fb | 64 | #else |
| 3ae31f6a CS |
65 | static inline int scsi_dh_activate(struct request_queue *req, |
| 66 | activate_complete fn, void *data) | |
| fe9233fb | 67 | { |
| 3ae31f6a | 68 | fn(data, 0); |
| fe9233fb CS |
69 | return 0; |
| 70 | } | |
| 71 | static inline int scsi_dh_handler_exist(const char *name) | |
| 72 | { | |
| 73 | return 0; | |
| 74 | } | |
| ae11b1b3 HR |
75 | static inline int scsi_dh_attach(struct request_queue *req, const char *name) |
| 76 | { | |
| 77 | return SCSI_DH_NOSYS; | |
| 78 | } | |
| 79 | static inline void scsi_dh_detach(struct request_queue *q) | |
| 80 | { | |
| 81 | return; | |
| 82 | } | |
| 18ee70c9 CS |
83 | static inline int scsi_dh_set_params(struct request_queue *req, const char *params) |
| 84 | { | |
| 85 | return -SCSI_DH_NOSYS; | |
| 86 | } | |
| fe9233fb | 87 | #endif |