amrvar.h revision 65245
1/*- 2 * Copyright (c) 1999,2000 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: head/sys/dev/amr/amrvar.h 65245 2000-08-30 07:52:50Z msmith $ 28 */ 29 30#if __FreeBSD_version >= 500005 31# include <sys/taskqueue.h> 32#endif 33 34#ifdef AMR_DEBUG 35# define debug(level, fmt, args...) do {if (level <= AMR_DEBUG) printf("%s: " fmt "\n", __FUNCTION__ , ##args);} while(0) 36# define debug_called(level) do {if (level <= AMR_DEBUG) printf("%s: called\n", __FUNCTION__);} while(0) 37#else 38# define debug(level, fmt, args...) 39# define debug_called(level) 40#endif 41#define xdebug(fmt, args...) printf("%s: " fmt "\n", __FUNCTION__ , ##args) 42 43/* 44 * Per-logical-drive datastructure 45 */ 46struct amr_logdrive 47{ 48 u_int32_t al_size; 49 int al_state; 50 int al_properties; 51 52 /* synthetic geometry */ 53 int al_cylinders; 54 int al_heads; 55 int al_sectors; 56 57 /* driver */ 58 device_t al_disk; 59}; 60 61/* 62 * Due to the difficulty of using the zone allocator to create a new 63 * zone from within a module, we use our own clustering to reduce 64 * memory wastage due to allocating lots of these small structures. 65 * 66 * 16k gives us a little under 200 command structures, which should 67 * normally be plenty. We will grab more if we need them. 68 */ 69 70#define AMR_CMD_CLUSTERSIZE (16 * 1024) 71 72/* 73 * Per-command control structure. 74 */ 75struct amr_command 76{ 77 TAILQ_ENTRY(amr_command) ac_link; 78 79 struct amr_softc *ac_sc; 80 u_int8_t ac_slot; 81 int ac_status; /* command completion status */ 82 struct amr_mailbox ac_mailbox; 83 int ac_flags; 84#define AMR_CMD_DATAIN (1<<0) 85#define AMR_CMD_DATAOUT (1<<1) 86#define AMR_CMD_CCB_DATAIN (1<<2) 87#define AMR_CMD_CCB_DATAOUT (1<<3) 88#define AMR_CMD_PRIORITY (1<<4) 89#define AMR_CMD_MAPPED (1<<5) 90#define AMR_CMD_SLEEP (1<<6) 91#define AMR_CMD_BUSY (1<<7) 92 93 struct bio *ac_bio; 94 95 void *ac_data; 96 size_t ac_length; 97 bus_dmamap_t ac_dmamap; 98 u_int32_t ac_dataphys; 99 100 void *ac_ccb_data; 101 size_t ac_ccb_length; 102 bus_dmamap_t ac_ccb_dmamap; 103 u_int32_t ac_ccb_dataphys; 104 105 void (* ac_complete)(struct amr_command *ac); 106}; 107 108struct amr_command_cluster 109{ 110 TAILQ_ENTRY(amr_command_cluster) acc_link; 111 struct amr_command acc_command[0]; 112}; 113 114#define AMR_CMD_CLUSTERCOUNT ((AMR_CMD_CLUSTERSIZE - sizeof(struct amr_command_cluster)) / \ 115 sizeof(struct amr_command)) 116 117/* 118 * Per-controller-instance data 119 */ 120struct amr_softc 121{ 122 /* bus attachments */ 123 device_t amr_dev; 124 struct resource *amr_reg; /* control registers */ 125 bus_space_handle_t amr_bhandle; 126 bus_space_tag_t amr_btag; 127 bus_dma_tag_t amr_parent_dmat; /* parent DMA tag */ 128 bus_dma_tag_t amr_buffer_dmat; /* data buffer DMA tag */ 129 struct resource *amr_irq; /* interrupt */ 130 void *amr_intr; 131 132 /* mailbox */ 133 volatile struct amr_mailbox *amr_mailbox; 134 volatile struct amr_mailbox64 *amr_mailbox64; 135 u_int32_t amr_mailboxphys; 136 bus_dma_tag_t amr_mailbox_dmat; 137 bus_dmamap_t amr_mailbox_dmamap; 138 139 /* scatter/gather lists and their controller-visible mappings */ 140 struct amr_sgentry *amr_sgtable; /* s/g lists */ 141 u_int32_t amr_sgbusaddr; /* s/g table base address in bus space */ 142 bus_dma_tag_t amr_sg_dmat; /* s/g buffer DMA tag */ 143 bus_dmamap_t amr_sg_dmamap; /* map for s/g buffers */ 144 145 /* controller limits and features */ 146 int amr_maxio; /* maximum number of I/O transactions */ 147 int amr_maxdrives; /* max number of logical drives */ 148 int amr_maxchan; /* count of SCSI channels */ 149 150 /* connected logical drives */ 151 struct amr_logdrive amr_drive[AMR_MAXLD]; 152 153 /* controller state */ 154 int amr_state; 155#define AMR_STATE_OPEN (1<<0) 156#define AMR_STATE_SUSPEND (1<<1) 157#define AMR_STATE_INTEN (1<<2) 158#define AMR_STATE_SHUTDOWN (1<<3) 159 160 /* per-controller queues */ 161 struct bio_queue_head amr_bioq; /* pending I/O with no commands */ 162 TAILQ_HEAD(,amr_command) amr_ready; /* commands ready to be submitted */ 163 struct amr_command *amr_busycmd[AMR_MAXCMD]; 164 int amr_busyslots; 165 TAILQ_HEAD(,amr_command) amr_completed; 166 TAILQ_HEAD(,amr_command) amr_freecmds; 167 TAILQ_HEAD(,amr_command_cluster) amr_cmd_clusters; 168 169 /* CAM attachments for passthrough */ 170 struct cam_sim *amr_cam_sim[AMR_MAX_CHANNELS]; 171 TAILQ_HEAD(, ccb_hdr) amr_cam_ccbq; 172 173 /* control device */ 174 dev_t amr_dev_t; 175 176 /* controller type-specific support */ 177 int amr_type; 178#define AMR_TYPE_QUARTZ (1<<0) 179#define AMR_IS_QUARTZ(sc) ((sc)->amr_type & AMR_TYPE_QUARTZ) 180#define AMR_TYPE_40LD (1<<1) 181#define AMR_IS_40LD(sc) ((sc)->amr_type & AMR_TYPE_40LD) 182 int (* amr_submit_command)(struct amr_softc *sc); 183 int (* amr_get_work)(struct amr_softc *sc, struct amr_mailbox *mbsave); 184 185 /* misc glue */ 186 struct intr_config_hook amr_ich; /* wait-for-interrupts probe hook */ 187 struct callout_handle amr_timeout; /* periodic status check */ 188#if __FreeBSD_version >= 500005 189 struct task amr_task_complete; /* deferred-completion task */ 190#endif 191}; 192 193/* 194 * Interface between bus connections and driver core. 195 */ 196extern int amr_attach(struct amr_softc *sc); 197extern void amr_free(struct amr_softc *sc); 198extern int amr_flush(struct amr_softc *sc); 199extern int amr_done(struct amr_softc *sc); 200extern void amr_startio(struct amr_softc *sc); 201 202extern devclass_t amr_devclass; 203 204/* 205 * Command buffer allocation. 206 */ 207extern struct amr_command *amr_alloccmd(struct amr_softc *sc); 208extern void amr_releasecmd(struct amr_command *ac); 209 210/* 211 * CAM interface 212 */ 213extern int amr_cam_attach(struct amr_softc *sc); 214extern void amr_cam_detach(struct amr_softc *sc); 215extern int amr_cam_command(struct amr_softc *sc, struct amr_command **acp); 216 217/* 218 * MegaRAID logical disk driver 219 */ 220struct amrd_softc 221{ 222 device_t amrd_dev; 223 dev_t amrd_dev_t; 224 struct amr_softc *amrd_controller; 225 struct amr_logdrive *amrd_drive; 226 struct disk amrd_disk; 227 struct devstat amrd_stats; 228 struct disklabel amrd_label; 229 int amrd_unit; 230 int amrd_flags; 231#define AMRD_OPEN (1<<0) /* drive is open (can't detach) */ 232}; 233 234/* 235 * Interface between driver core and disk driver (should be using a bus?) 236 */ 237extern int amr_submit_bio(struct amr_softc *sc, struct bio *bio); 238extern void amrd_intr(void *data); 239 240/******************************************************************************** 241 * Enqueue/dequeue functions 242 */ 243static __inline void 244amr_enqueue_bio(struct amr_softc *sc, struct bio *bio) 245{ 246 int s; 247 248 s = splbio(); 249 bioq_insert_tail(&sc->amr_bioq, bio); 250 splx(s); 251} 252 253static __inline struct bio * 254amr_dequeue_bio(struct amr_softc *sc) 255{ 256 struct bio *bio; 257 int s; 258 259 s = splbio(); 260 if ((bio = bioq_first(&sc->amr_bioq)) != NULL) 261 bioq_remove(&sc->amr_bioq, bio); 262 splx(s); 263 return(bio); 264} 265 266static __inline void 267amr_enqueue_ready(struct amr_command *ac) 268{ 269 int s; 270 271 s = splbio(); 272 TAILQ_INSERT_TAIL(&ac->ac_sc->amr_ready, ac, ac_link); 273 splx(s); 274} 275 276static __inline void 277amr_requeue_ready(struct amr_command *ac) 278{ 279 int s; 280 281 s = splbio(); 282 TAILQ_INSERT_HEAD(&ac->ac_sc->amr_ready, ac, ac_link); 283 splx(s); 284} 285 286static __inline struct amr_command * 287amr_dequeue_ready(struct amr_softc *sc) 288{ 289 struct amr_command *ac; 290 int s; 291 292 s = splbio(); 293 if ((ac = TAILQ_FIRST(&sc->amr_ready)) != NULL) 294 TAILQ_REMOVE(&sc->amr_ready, ac, ac_link); 295 splx(s); 296 return(ac); 297} 298 299static __inline void 300amr_enqueue_completed(struct amr_command *ac) 301{ 302 int s; 303 304 s = splbio(); 305 TAILQ_INSERT_TAIL(&ac->ac_sc->amr_completed, ac, ac_link); 306 splx(s); 307} 308 309static __inline struct amr_command * 310amr_dequeue_completed(struct amr_softc *sc) 311{ 312 struct amr_command *ac; 313 int s; 314 315 s = splbio(); 316 if ((ac = TAILQ_FIRST(&sc->amr_completed)) != NULL) 317 TAILQ_REMOVE(&sc->amr_completed, ac, ac_link); 318 splx(s); 319 return(ac); 320} 321 322static __inline void 323amr_enqueue_free(struct amr_command *ac) 324{ 325 int s; 326 327 s = splbio(); 328 TAILQ_INSERT_TAIL(&ac->ac_sc->amr_freecmds, ac, ac_link); 329 splx(s); 330} 331 332static __inline struct amr_command * 333amr_dequeue_free(struct amr_softc *sc) 334{ 335 struct amr_command *ac; 336 int s; 337 338 s = splbio(); 339 if ((ac = TAILQ_FIRST(&sc->amr_freecmds)) != NULL) 340 TAILQ_REMOVE(&sc->amr_freecmds, ac, ac_link); 341 splx(s); 342 return(ac); 343} 344