sys/dev/raid/amr/amrvar.h

   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  * Copyright (c) 2002 Eric Moore
  28  * Copyright (c) 2002 LSI Logic Corporation
  29  * All rights reserved.
  30  *
  31  * Redistribution and use in source and binary forms, with or without
  32  * modification, are permitted provided that the following conditions
  33  * are met:
  34  * 1. Redistributions of source code must retain the above copyright
  35  *    notice, this list of conditions and the following disclaimer.
  36  * 2. Redistributions in binary form must reproduce the above copyright
  37  *    notice, this list of conditions and the following disclaimer in the
  38  *    documentation and/or other materials provided with the distribution.
  39  * 3. The party using or redistributing the source code and binary forms
  40  *    agrees to the disclaimer below and the terms and conditions set forth
  41  *    herein.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  *      $FreeBSD: src/sys/dev/amr/amrvar.h,v 1.2.2.5 2002/12/20 15:12:04 emoore Exp $
  56  *      $DragonFly: src/sys/dev/raid/amr/amrvar.h,v 1.11 2008/06/10 17:20:49 dillon Exp $
  57  */
  58
  59 #include <sys/thread2.h>
  60
  61 #if defined(__FreeBSD__) && __FreeBSD_version >= 500005
  62 # include <sys/taskqueue.h>
  63 #endif
  64
  65 #ifdef AMR_DEBUG
  66 # define debug(level, fmt, args...)     do {if (level <= AMR_DEBUG) kprintf("%s: " fmt "\n", __func__ , ##args);} while(0)
  67 # define debug_called(level)            do {if (level <= AMR_DEBUG) kprintf("%s: called\n", __func__);} while(0)
  68 #else
  69 # define debug(level, fmt, args...)
  70 # define debug_called(level)
  71 #endif
  72 #define xdebug(fmt, args...)    kprintf("%s: " fmt "\n", __func__ , ##args)
  73
  74 /*
  75  * Per-logical-drive datastructure
  76  */
  77 struct amr_logdrive
  78 {
  79     u_int32_t   al_size;
  80     int         al_state;
  81     int         al_properties;
  82
  83     /* synthetic geometry */
  84     int         al_cylinders;
  85     int         al_heads;
  86     int         al_sectors;
  87
  88     /* driver */
  89     device_t    al_disk;
  90 };
  91
  92 /*
  93  * Due to the difficulty of using the zone allocator to create a new
  94  * zone from within a module, we use our own clustering to reduce
  95  * memory wastage due to allocating lots of these small structures.
  96  *
  97  * 16k gives us a little under 200 command structures, which should
  98  * normally be plenty.  We will grab more if we need them.
  99  */
 100
 101 #define AMR_CMD_CLUSTERSIZE     (16 * 1024)
 102
 103 /*
 104  * Per-command control structure.
 105  */
 106 struct amr_command
 107 {
 108     TAILQ_ENTRY(amr_command)    ac_link;
 109
 110     struct amr_softc            *ac_sc;
 111     u_int8_t                    ac_slot;
 112     int                         ac_status;      /* command completion status */
 113     struct amr_mailbox          ac_mailbox;
 114     int                         ac_flags;
 115 #define AMR_CMD_DATAIN          (1<<0)
 116 #define AMR_CMD_DATAOUT         (1<<1)
 117 #define AMR_CMD_CCB_DATAIN      (1<<2)
 118 #define AMR_CMD_CCB_DATAOUT     (1<<3)
 119 #define AMR_CMD_PRIORITY        (1<<4)
 120 #define AMR_CMD_MAPPED          (1<<5)
 121 #define AMR_CMD_SLEEP           (1<<6)
 122 #define AMR_CMD_BUSY            (1<<7)
 123
 124     struct bio                  *ac_bio;
 125
 126     void                        *ac_data;
 127     size_t                      ac_length;
 128     bus_dmamap_t                ac_dmamap;
 129     u_int32_t                   ac_dataphys;
 130
 131     void                        *ac_ccb_data;
 132     size_t                      ac_ccb_length;
 133     bus_dmamap_t                ac_ccb_dmamap;
 134     u_int32_t                   ac_ccb_dataphys;
 135
 136     void                        (* ac_complete)(struct amr_command *ac);
 137     void                        *ac_private;
 138 };
 139
 140 struct amr_command_cluster
 141 {
 142     TAILQ_ENTRY(amr_command_cluster)    acc_link;
 143     struct amr_command          acc_command[0];
 144 };
 145
 146 #define AMR_CMD_CLUSTERCOUNT    ((AMR_CMD_CLUSTERSIZE - sizeof(struct amr_command_cluster)) /   \
 147                                  sizeof(struct amr_command))
 148
 149 /*
 150  * Per-controller-instance data
 151  */
 152 struct amr_softc
 153 {
 154     /* bus attachments */
 155     device_t                    amr_dev;
 156     struct resource             *amr_reg;               /* control registers */
 157     bus_space_handle_t          amr_bhandle;
 158     bus_space_tag_t             amr_btag;
 159     bus_dma_tag_t               amr_parent_dmat;        /* parent DMA tag */
 160     bus_dma_tag_t               amr_buffer_dmat;        /* data buffer DMA tag */
 161     struct resource             *amr_irq;               /* interrupt */
 162     void                        *amr_intr;
 163
 164     /* mailbox */
 165     volatile struct amr_mailbox         *amr_mailbox;
 166     volatile struct amr_mailbox64       *amr_mailbox64;
 167     u_int32_t                   amr_mailboxphys;
 168     bus_dma_tag_t               amr_mailbox_dmat;
 169     bus_dmamap_t                amr_mailbox_dmamap;
 170
 171     /* scatter/gather lists and their controller-visible mappings */
 172     struct amr_sgentry          *amr_sgtable;           /* s/g lists */
 173     u_int32_t                   amr_sgbusaddr;          /* s/g table base address in bus space */
 174     bus_dma_tag_t               amr_sg_dmat;            /* s/g buffer DMA tag */
 175     bus_dmamap_t                amr_sg_dmamap;          /* map for s/g buffers */
 176
 177     /* controller limits and features */
 178     int                         amr_maxio;              /* maximum number of I/O transactions */
 179     int                         amr_maxdrives;          /* max number of logical drives */
 180     int                         amr_maxchan;            /* count of SCSI channels */
 181
 182     /* connected logical drives */
 183     struct amr_logdrive         amr_drive[AMR_MAXLD];
 184
 185     /* controller state */
 186     int                         amr_state;
 187 #define AMR_STATE_OPEN          (1<<0)
 188 #define AMR_STATE_SUSPEND       (1<<1)
 189 #define AMR_STATE_INTEN         (1<<2)
 190 #define AMR_STATE_SHUTDOWN      (1<<3)
 191
 192     /* per-controller queues */
 193     struct bio_queue_head       amr_bioq;               /* pending I/O with no commands */
 194     TAILQ_HEAD(,amr_command)    amr_ready;              /* commands ready to be submitted */
 195     struct amr_command          *amr_busycmd[AMR_MAXCMD];
 196     int                         amr_busyslots;
 197     TAILQ_HEAD(,amr_command)    amr_completed;
 198     TAILQ_HEAD(,amr_command)    amr_freecmds;
 199     TAILQ_HEAD(,amr_command_cluster)    amr_cmd_clusters;
 200
 201     /* CAM attachments for passthrough */
 202     struct cam_sim              *amr_cam_sim[AMR_MAX_CHANNELS];
 203     TAILQ_HEAD(, ccb_hdr)       amr_cam_ccbq;
 204
 205     /* control device */
 206     cdev_t                      amr_dev_t;
 207
 208     /* controller type-specific support */
 209     int                         amr_type;
 210 #define AMR_TYPE_QUARTZ         (1<<0)
 211 #define AMR_IS_QUARTZ(sc)       ((sc)->amr_type & AMR_TYPE_QUARTZ)
 212 #define AMR_TYPE_40LD           (1<<1)
 213 #define AMR_IS_40LD(sc)         ((sc)->amr_type & AMR_TYPE_40LD)
 214     int                         (* amr_submit_command)(struct amr_softc *sc);
 215     int                         (* amr_get_work)(struct amr_softc *sc, struct amr_mailbox *mbsave);
 216     int                         (*amr_poll_command)(struct amr_command *ac);
 217     int                         support_ext_cdb;        /* greater than 10 byte cdb support */
 218
 219     /* misc glue */
 220     struct intr_config_hook     amr_ich;                /* wait-for-interrupts probe hook */
 221     struct callout              amr_timeout;            /* periodic status check */
 222 #if defined(__FreeBSD__) && __FreeBSD_version >= 500005
 223     struct task                 amr_task_complete;      /* deferred-completion task */
 224 #endif
 225 };
 226
 227 /*
 228  * Interface between bus connections and driver core.
 229  */
 230 extern int              amr_attach(struct amr_softc *sc);
 231 extern void             amr_free(struct amr_softc *sc);
 232 extern int              amr_flush(struct amr_softc *sc);
 233 extern int              amr_done(struct amr_softc *sc);
 234 extern void             amr_startio(struct amr_softc *sc);
 235
 236 /*
 237  * Command buffer allocation.
 238  */
 239 extern struct amr_command       *amr_alloccmd(struct amr_softc *sc);
 240 extern void                     amr_releasecmd(struct amr_command *ac);
 241
 242 /*
 243  * CAM interface
 244  */
 245 extern int              amr_cam_attach(struct amr_softc *sc);
 246 extern void             amr_cam_detach(struct amr_softc *sc);
 247 extern int              amr_cam_command(struct amr_softc *sc, struct amr_command **acp);
 248
 249 /*
 250  * MegaRAID logical disk driver
 251  */
 252 struct amrd_softc
 253 {
 254     device_t            amrd_dev;
 255     cdev_t              amrd_dev_t;
 256     struct amr_softc    *amrd_controller;
 257     struct amr_logdrive *amrd_drive;
 258     struct disk         amrd_disk;
 259     struct devstat      amrd_stats;
 260     int                 amrd_unit;
 261     int                 amrd_flags;
 262 #define AMRD_OPEN       (1<<0)          /* drive is open (can't detach) */
 263 };
 264
 265 /*
 266  * Interface between driver core and disk driver (should be using a bus?)
 267  */
 268 extern int      amr_submit_bio(struct amr_softc *sc, struct bio *bio);
 269 extern void     amrd_intr(struct bio *bio);
 270 extern int      amr_dump_blocks(struct amr_softc *sc, int unit, u_int64_t lba, void *data, int blks);
 271
 272 /********************************************************************************
 273  * Enqueue/dequeue functions
 274  */
 275 static __inline void
 276 amr_enqueue_bio(struct amr_softc *sc, struct bio *bio)
 277 {
 278     crit_enter();
 279     bioqdisksort(&sc->amr_bioq, bio);
 280     crit_exit();
 281 }
 282
 283 static __inline struct bio *
 284 amr_dequeue_bio(struct amr_softc *sc)
 285 {
 286     struct bio  *bio;
 287
 288     crit_enter();
 289     if ((bio = bioq_first(&sc->amr_bioq)) != NULL)
 290         bioq_remove(&sc->amr_bioq, bio);
 291     crit_exit();
 292     return(bio);
 293 }
 294
 295 static __inline void
 296 amr_enqueue_ready(struct amr_command *ac)
 297 {
 298     crit_enter();
 299     TAILQ_INSERT_TAIL(&ac->ac_sc->amr_ready, ac, ac_link);
 300     crit_exit();
 301 }
 302
 303 static __inline void
 304 amr_requeue_ready(struct amr_command *ac)
 305 {
 306     crit_enter();
 307     TAILQ_INSERT_HEAD(&ac->ac_sc->amr_ready, ac, ac_link);
 308     crit_exit();
 309 }
 310
 311 static __inline struct amr_command *
 312 amr_dequeue_ready(struct amr_softc *sc)
 313 {
 314     struct amr_command  *ac;
 315
 316     crit_enter();
 317     if ((ac = TAILQ_FIRST(&sc->amr_ready)) != NULL)
 318         TAILQ_REMOVE(&sc->amr_ready, ac, ac_link);
 319     crit_exit();
 320     return(ac);
 321 }
 322
 323 static __inline void
 324 amr_enqueue_completed(struct amr_command *ac)
 325 {
 326     crit_enter();
 327     TAILQ_INSERT_TAIL(&ac->ac_sc->amr_completed, ac, ac_link);
 328     crit_exit();
 329 }
 330
 331 static __inline struct amr_command *
 332 amr_dequeue_completed(struct amr_softc *sc)
 333 {
 334     struct amr_command  *ac;
 335
 336     crit_enter();
 337     if ((ac = TAILQ_FIRST(&sc->amr_completed)) != NULL)
 338         TAILQ_REMOVE(&sc->amr_completed, ac, ac_link);
 339     crit_exit();
 340     return(ac);
 341 }
 342
 343 static __inline void
 344 amr_enqueue_free(struct amr_command *ac)
 345 {
 346     crit_enter();
 347     TAILQ_INSERT_TAIL(&ac->ac_sc->amr_freecmds, ac, ac_link);
 348     crit_exit();
 349 }
 350
 351 static __inline struct amr_command *
 352 amr_dequeue_free(struct amr_softc *sc)
 353 {
 354     struct amr_command  *ac;
 355
 356     crit_enter();
 357     if ((ac = TAILQ_FIRST(&sc->amr_freecmds)) != NULL)
 358         TAILQ_REMOVE(&sc->amr_freecmds, ac, ac_link);
 359     crit_exit();
 360     return(ac);
 361 }