Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/twe/twevar.h
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1 /*- 2 * Copyright (c) 2000 Michael Smith 3 * Copyright (c) 2000 BSDi 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD: releng/8.4/sys/dev/twe/twevar.h 201587 2010-01-05 14:02:12Z mav $ 28 */ 29 30 #define TWE_DRIVER_VERSION_STRING "1.50.01.002" 31 32 #ifdef TWE_DEBUG 33 #define debug(level, fmt, args...) \ 34 do { \ 35 if (level <= TWE_DEBUG) printf("%s: " fmt "\n", __func__ , ##args); \ 36 } while(0) 37 #define debug_called(level) \ 38 do { \ 39 if (level <= TWE_DEBUG) printf("%s: called\n", __func__); \ 40 } while(0) 41 #else 42 #define debug(level, fmt, args...) 43 #define debug_called(level) 44 #endif 45 46 /* 47 * Structure describing a logical unit as attached to the controller 48 */ 49 struct twe_drive 50 { 51 /* unit properties */ 52 u_int32_t td_size; 53 int td_cylinders; 54 int td_heads; 55 int td_sectors; 56 int td_sys_unit; /* device unit number */ 57 int td_twe_unit; /* index into sc->twe_drive[] */ 58 59 /* unit state and type */ 60 u_int8_t td_state; 61 u_int8_t td_type; 62 u_int8_t td_stripe; 63 64 /* handle for attached driver */ 65 device_t td_disk; 66 }; 67 68 /* 69 * Per-command control structure. 70 * 71 * Note that due to alignment constraints on the tc_command field, this *must* be 64-byte aligned. 72 * We achieve this by placing the command at the beginning of the structure, and using malloc() 73 * to allocate each structure. 74 */ 75 struct twe_request 76 { 77 int tr_tag; 78 /* command payload */ 79 void *tr_data; /* data buffer */ 80 void *tr_realdata; /* copy of real data buffer pointer for alignment fixup */ 81 size_t tr_length; 82 83 TAILQ_ENTRY(twe_request) tr_link; /* list linkage */ 84 struct twe_softc *tr_sc; /* controller that owns us */ 85 int tr_status; /* command status */ 86 #define TWE_CMD_SETUP 0 /* being assembled */ 87 #define TWE_CMD_BUSY 1 /* submitted to controller */ 88 #define TWE_CMD_COMPLETE 2 /* completed by controller (maybe with error) */ 89 #define TWE_CMD_ERROR 3 /* encountered error, even before submission to controller */ 90 int tr_flags; 91 #define TWE_CMD_DATAIN (1<<0) 92 #define TWE_CMD_DATAOUT (1<<1) 93 #define TWE_CMD_ALIGNBUF (1<<2) /* data in bio is misaligned, have to copy to/from private buffer */ 94 #define TWE_CMD_SLEEPER (1<<3) /* owner is sleeping on this command */ 95 #define TWE_CMD_IMMEDIATE (1<<4) /* immediate request */ 96 #define TWE_CMD_MAPPED (1<<5) 97 #define TWE_CMD_IN_PROGRESS (1<<6) /* bus_dmamap_load returned EINPROGRESS */ 98 void (* tr_complete)(struct twe_request *tr); /* completion handler */ 99 void *tr_private; /* submitter-private data or wait channel */ 100 101 TWE_PLATFORM_REQUEST /* platform-specific request elements */ 102 }; 103 104 #define TWE_FIND_COMMAND(tr) \ 105 (TWE_Command *)((u_int8_t *)(tr)->tr_sc->twe_cmd + \ 106 ((tr)->tr_tag * sizeof(TWE_Command))) 107 #define TWE_FIND_COMMANDPHYS(tr) ((tr)->tr_sc->twe_cmdphys + \ 108 ((tr)->tr_tag * sizeof(TWE_Command))) 109 110 /* 111 * Per-controller state. 112 */ 113 struct twe_softc 114 { 115 /* controller queues and arrays */ 116 TAILQ_HEAD(, twe_request) twe_free; /* command structures available for reuse */ 117 twe_bioq twe_bioq; /* outstanding I/O operations */ 118 TAILQ_HEAD(, twe_request) twe_ready; /* requests ready for the controller */ 119 TAILQ_HEAD(, twe_request) twe_busy; /* requests busy in the controller */ 120 TAILQ_HEAD(, twe_request) twe_complete; /* active commands (busy or waiting for completion) */ 121 struct twe_request *twe_lookup[TWE_Q_LENGTH]; /* commands indexed by request ID */ 122 struct twe_drive twe_drive[TWE_MAX_UNITS]; /* attached drives */ 123 124 /* asynchronous event handling */ 125 u_int16_t twe_aen_queue[TWE_Q_LENGTH]; /* AENs queued for userland tool(s) */ 126 int twe_aen_head, twe_aen_tail; /* ringbuffer pointers for AEN queue */ 127 int twe_wait_aen; /* wait-for-aen notification */ 128 129 /* controller status */ 130 int twe_state; 131 #define TWE_STATE_INTEN (1<<0) /* interrupts have been enabled */ 132 #define TWE_STATE_SHUTDOWN (1<<1) /* controller is shut down */ 133 #define TWE_STATE_OPEN (1<<2) /* control device is open */ 134 #define TWE_STATE_SUSPEND (1<<3) /* controller is suspended */ 135 #define TWE_STATE_FRZN (1<<4) /* got EINPROGRESS */ 136 #define TWE_STATE_CTLR_BUSY (1<<5) /* controller cmd queue full */ 137 int twe_host_id; 138 struct twe_qstat twe_qstat[TWEQ_COUNT]; /* queue statistics */ 139 140 TWE_PLATFORM_SOFTC /* platform-specific softc elements */ 141 }; 142 143 /* 144 * Interface betwen driver core and platform-dependant code. 145 */ 146 extern int twe_setup(struct twe_softc *sc); /* do early driver/controller setup */ 147 extern void twe_init(struct twe_softc *sc); /* init controller */ 148 extern void twe_deinit(struct twe_softc *sc); /* stop controller */ 149 extern void twe_intr(struct twe_softc *sc); /* hardware interrupt signalled */ 150 extern void twe_startio(struct twe_softc *sc); 151 extern int twe_start(struct twe_request *tr); 152 extern int twe_dump_blocks(struct twe_softc *sc, int unit, /* crashdump block write */ 153 u_int32_t lba, void *data, int nblks); 154 extern int twe_ioctl(struct twe_softc *sc, int cmd, 155 void *addr); /* handle user request */ 156 extern void twe_describe_controller(struct twe_softc *sc); /* print controller info */ 157 extern void twe_print_controller(struct twe_softc *sc); 158 extern void twe_enable_interrupts(struct twe_softc *sc); /* enable controller interrupts */ 159 extern void twe_disable_interrupts(struct twe_softc *sc); /* disable controller interrupts */ 160 161 extern int twe_attach_drive(struct twe_softc *sc, 162 struct twe_drive *dr); /* attach drive when found in twe_init */ 163 extern int twe_detach_drive(struct twe_softc *sc, 164 int unit); /* detach drive */ 165 extern void twe_clear_pci_parity_error(struct twe_softc *sc); 166 extern void twe_clear_pci_abort(struct twe_softc *sc); 167 extern void twed_intr(twe_bio *bp); /* return bio from core */ 168 extern struct twe_request *twe_allocate_request(struct twe_softc *sc, int tag); /* allocate request structure */ 169 extern void twe_free_request(struct twe_request *tr); /* free request structure */ 170 extern int twe_map_request(struct twe_request *tr); /* make request visible to controller, do s/g */ 171 extern void twe_unmap_request(struct twe_request *tr); /* cleanup after transfer, unmap */ 172 173 /******************************************************************************** 174 * Queue primitives 175 */ 176 #define TWEQ_ADD(sc, qname) \ 177 do { \ 178 struct twe_qstat *qs = &(sc)->twe_qstat[qname]; \ 179 \ 180 qs->q_length++; \ 181 if (qs->q_length > qs->q_max) \ 182 qs->q_max = qs->q_length; \ 183 } while(0) 184 185 #define TWEQ_REMOVE(sc, qname) \ 186 do { \ 187 struct twe_qstat *qs = &(sc)->twe_qstat[qname]; \ 188 \ 189 qs->q_length--; \ 190 if (qs->q_length < qs->q_min) \ 191 qs->q_min = qs->q_length; \ 192 } while(0); 193 194 #define TWEQ_INIT(sc, qname) \ 195 do { \ 196 sc->twe_qstat[qname].q_length = 0; \ 197 sc->twe_qstat[qname].q_max = 0; \ 198 sc->twe_qstat[qname].q_min = 0xFFFFFFFF; \ 199 } while(0) 200 201 202 #define TWEQ_REQUEST_QUEUE(name, index) \ 203 static __inline void \ 204 twe_initq_ ## name (struct twe_softc *sc) \ 205 { \ 206 TAILQ_INIT(&sc->twe_ ## name); \ 207 TWEQ_INIT(sc, index); \ 208 } \ 209 static __inline void \ 210 twe_enqueue_ ## name (struct twe_request *tr) \ 211 { \ 212 int s; \ 213 \ 214 s = splbio(); \ 215 TAILQ_INSERT_TAIL(&tr->tr_sc->twe_ ## name, tr, tr_link); \ 216 TWEQ_ADD(tr->tr_sc, index); \ 217 splx(s); \ 218 } \ 219 static __inline void \ 220 twe_requeue_ ## name (struct twe_request *tr) \ 221 { \ 222 int s; \ 223 \ 224 s = splbio(); \ 225 TAILQ_INSERT_HEAD(&tr->tr_sc->twe_ ## name, tr, tr_link); \ 226 TWEQ_ADD(tr->tr_sc, index); \ 227 splx(s); \ 228 } \ 229 static __inline struct twe_request * \ 230 twe_dequeue_ ## name (struct twe_softc *sc) \ 231 { \ 232 struct twe_request *tr; \ 233 int s; \ 234 \ 235 s = splbio(); \ 236 if ((tr = TAILQ_FIRST(&sc->twe_ ## name)) != NULL) { \ 237 TAILQ_REMOVE(&sc->twe_ ## name, tr, tr_link); \ 238 TWEQ_REMOVE(sc, index); \ 239 } \ 240 splx(s); \ 241 return(tr); \ 242 } \ 243 static __inline void \ 244 twe_remove_ ## name (struct twe_request *tr) \ 245 { \ 246 int s; \ 247 \ 248 s = splbio(); \ 249 TAILQ_REMOVE(&tr->tr_sc->twe_ ## name, tr, tr_link); \ 250 TWEQ_REMOVE(tr->tr_sc, index); \ 251 splx(s); \ 252 } 253 254 TWEQ_REQUEST_QUEUE(free, TWEQ_FREE) 255 TWEQ_REQUEST_QUEUE(ready, TWEQ_READY) 256 TWEQ_REQUEST_QUEUE(busy, TWEQ_BUSY) 257 TWEQ_REQUEST_QUEUE(complete, TWEQ_COMPLETE) 258 259 /* 260 * outstanding bio queue 261 */ 262 static __inline void 263 twe_initq_bio(struct twe_softc *sc) 264 { 265 TWE_BIO_QINIT(sc->twe_bioq); 266 TWEQ_INIT(sc, TWEQ_BIO); 267 } 268 269 static __inline void 270 twe_enqueue_bio(struct twe_softc *sc, twe_bio *bp) 271 { 272 int s; 273 274 s = splbio(); 275 TWE_BIO_QINSERT(sc->twe_bioq, bp); 276 TWEQ_ADD(sc, TWEQ_BIO); 277 splx(s); 278 } 279 280 static __inline twe_bio * 281 twe_dequeue_bio(struct twe_softc *sc) 282 { 283 int s; 284 twe_bio *bp; 285 286 s = splbio(); 287 if ((bp = TWE_BIO_QFIRST(sc->twe_bioq)) != NULL) { 288 TWE_BIO_QREMOVE(sc->twe_bioq, bp); 289 TWEQ_REMOVE(sc, TWEQ_BIO); 290 } 291 splx(s); 292 return(bp); 293 }
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