1 /* 2 * Data structures and definitions for SCSI Interface Modules (SIMs). 3 * 4 * Copyright (c) 1997 Justin T. Gibbs. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions, and the following disclaimer, 12 * without modification, immediately at the beginning of the file. 13 * 2. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: src/sys/cam/cam_sim.h,v 1.4 1999/12/29 04:54:27 peter Exp $ 29 * $DragonFly: src/sys/bus/cam/cam_sim.h,v 1.9 2008/07/18 00:07:21 dillon Exp $ 30 */ 31 32 #ifndef _CAM_CAM_SIM_H 33 #define _CAM_CAM_SIM_H 1 34 35 #ifdef _KERNEL 36 37 #ifndef _SYS_SPINLOCK_H_ 38 #include <sys/spinlock.h> 39 #endif 40 41 /* 42 * The sim driver creates a sim for each controller. The sim device 43 * queue is separately created in order to allow resource sharing between 44 * sims. For instance, a driver may create one sim for each channel of 45 * a multi-channel controller and use the same queue for each channel. 46 * In this way, the queue resources are shared across all the channels 47 * of the multi-channel controller. 48 */ 49 50 struct cam_sim; 51 struct cam_devq; 52 53 typedef void (*sim_action_func)(struct cam_sim *sim, union ccb *ccb); 54 typedef void (*sim_poll_func)(struct cam_sim *sim); 55 56 typedef struct lock sim_lock; 57 extern sim_lock sim_mplock; 58 59 void cam_sim_lock(sim_lock *lock); 60 void cam_sim_unlock(sim_lock *lock); 61 int cam_sim_cond_lock(sim_lock *lock); 62 void cam_sim_cond_unlock(sim_lock *lock, int doun); 63 void sim_lock_assert_owned(sim_lock *lock); 64 void sim_lock_assert_unowned(sim_lock *lock); 65 int sim_lock_sleep(void *ident, int flags, const char *wmesg, 66 int timo, sim_lock *lock); 67 struct cam_devq * cam_simq_alloc(u_int32_t max_sim_transactions); 68 void cam_simq_release(struct cam_devq *devq); 69 70 struct cam_sim * cam_sim_alloc(sim_action_func sim_action, 71 sim_poll_func sim_poll, 72 const char *sim_name, 73 void *softc, 74 u_int32_t unit, 75 sim_lock *lock, 76 int max_dev_transactions, 77 int max_tagged_dev_transactions, 78 struct cam_devq *queue); 79 void cam_sim_free(struct cam_sim *sim); 80 void cam_sim_release(struct cam_sim *sim, int flags); 81 void cam_sim_set_max_tags(struct cam_sim *sim, int max_tags); 82 83 #define CAM_SIM_SOFTC 0x0002 84 85 /* Optional sim attributes may be set with these. */ 86 void cam_sim_set_path(struct cam_sim *sim, u_int32_t path_id); 87 88 89 90 /* Convenience routines for accessing sim attributes. */ 91 static __inline u_int32_t cam_sim_path(struct cam_sim *sim); 92 static __inline const char *cam_sim_name(struct cam_sim *sim); 93 static __inline void * cam_sim_softc(struct cam_sim *sim); 94 static __inline u_int32_t cam_sim_unit(struct cam_sim *sim); 95 static __inline u_int32_t cam_sim_bus(struct cam_sim *sim); 96 97 98 99 /* Generically useful offsets into the sim private area */ 100 #define spriv_ptr0 sim_priv.entries[0].ptr 101 #define spriv_ptr1 sim_priv.entries[1].ptr 102 #define spriv_field0 sim_priv.entries[0].field 103 #define spriv_field1 sim_priv.entries[1].field 104 105 /* 106 * The sim driver should not access anything directly from this 107 * structure. 108 */ 109 struct cam_sim { 110 sim_action_func sim_action; 111 sim_poll_func sim_poll; 112 const char *sim_name; 113 void *softc; /* might be NULL */ 114 sim_lock *lock; 115 struct spinlock sim_spin; 116 TAILQ_HEAD(, ccb_hdr) sim_doneq; 117 TAILQ_ENTRY(cam_sim) links; 118 u_int32_t path_id; /* bootdev may set this to 0? */ 119 u_int32_t unit_number; 120 u_int32_t bus_id; 121 int max_tagged_dev_openings; 122 int max_dev_openings; 123 u_int32_t flags; 124 #define CAM_SIM_REL_TIMEOUT_PENDING 0x01 125 #define CAM_SIM_MPSAFE 0x02 126 #define CAM_SIM_ON_DONEQ 0x04 127 #define CAM_SIM_DEREGISTERED 0x08 128 struct callout callout; 129 struct cam_devq *devq; /* Device Queue to use for this SIM */ 130 int refcount; /* References to the sim */ 131 132 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */ 133 SLIST_HEAD(,ccb_hdr) ccb_freeq; 134 /* 135 * Maximum size of ccb pool. Modified as devices are added/removed 136 * or have their * opening counts changed. 137 */ 138 u_int max_ccbs; 139 /* Current count of allocated ccbs */ 140 u_int ccb_count; 141 142 }; 143 144 #define CAM_SIM_LOCK(sim) cam_sim_lock((sim)->lock) 145 #define CAM_SIM_UNLOCK(sim) cam_sim_unlock((sim)->lock) 146 #define CAM_SIM_COND_LOCK(sim) cam_sim_cond_lock((sim)->lock) 147 #define CAM_SIM_COND_UNLOCK(sim, doun) cam_sim_cond_unlock((sim)->lock, doun) 148 149 static __inline u_int32_t 150 cam_sim_path(struct cam_sim *sim) 151 { 152 return (sim->path_id); 153 } 154 155 static __inline const char * 156 cam_sim_name(struct cam_sim *sim) 157 { 158 return (sim->sim_name); 159 } 160 161 static __inline void * 162 cam_sim_softc(struct cam_sim *sim) 163 { 164 return (sim->softc); 165 } 166 167 static __inline u_int32_t 168 cam_sim_unit(struct cam_sim *sim) 169 { 170 return (sim->unit_number); 171 } 172 173 static __inline u_int32_t 174 cam_sim_bus(struct cam_sim *sim) 175 { 176 return (sim->bus_id); 177 } 178 179 #endif /* _KERNEL */ 180 #endif /* _CAM_CAM_SIM_H */ 181