sys/dev/raid/ciss/cissvar.h

   1 /*-
   2  * Copyright (c) 2001 Michael Smith
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  *      $FreeBSD: src/sys/dev/ciss/cissvar.h,v 1.3.2.4 2004/06/23 20:48:36 scottl Exp $
  27  *      $DragonFly: src/sys/dev/raid/ciss/cissvar.h,v 1.7 2006/12/22 23:26:23 swildner Exp $
  28  */
  29
  30 #include <sys/thread2.h>
  31
  32 /*
  33  * CISS adapter driver datastructures
  34  */
  35
  36 /************************************************************************
  37  * Tunable parameters
  38  */
  39
  40 /*
  41  * There is no guaranteed upper bound on the number of concurrent
  42  * commands an adapter may claim to support.  Cap it at a reasonable
  43  * value.
  44  */
  45 #define CISS_MAX_REQUESTS       256
  46
  47 /*
  48  * Maximum number of logical drives we support.
  49  */
  50 #define CISS_MAX_LOGICAL        15
  51
  52 /*
  53  * Maximum number of physical devices we support.
  54  */
  55 #define CISS_MAX_PHYSICAL       1024
  56
  57 /*
  58  * Interrupt reduction can be controlled by tuning the interrupt
  59  * coalesce delay and count paramters.  The delay (in microseconds)
  60  * defers delivery of interrupts to increase the chance of there being
  61  * more than one completed command ready when the interrupt is
  62  * delivered.  The count expedites the delivery of the interrupt when
  63  * the given number of commands are ready.
  64  *
  65  * If the delay is set to 0, interrupts are delivered immediately.
  66  */
  67 #define CISS_INTERRUPT_COALESCE_DELAY   1000
  68 #define CISS_INTERRUPT_COALESCE_COUNT   16
  69
  70 /*
  71  * Heartbeat routine timeout in seconds.  Note that since event
  72  * handling is performed on a callback basis, we don't need this to
  73  * run very often.
  74  */
  75 #define CISS_HEARTBEAT_RATE             10
  76
  77 /************************************************************************
  78  * Compatibility with older versions of FreeBSD
  79  */
  80 #if defined(__FreeBSD__) && __FreeBSD_version < 440001
  81 #warning testing old-FreeBSD compat
  82 typedef struct proc     d_thread_t;
  83 #endif
  84
  85 /************************************************************************
  86  * Command queue statistics
  87  */
  88
  89 #define CISSQ_FREE      0
  90 #define CISSQ_BUSY      1
  91 #define CISSQ_COMPLETE  2
  92 #define CISSQ_NOTIFY    3
  93 #define CISSQ_COUNT     4
  94
  95 struct ciss_qstat
  96 {
  97     u_int32_t   q_length;
  98     u_int32_t   q_max;
  99 };
 100
 101 /************************************************************************
 102  * Driver version.  Only really significant to the ACU interface.
 103  */
 104 #define CISS_DRIVER_VERSION     20011201
 105
 106 /************************************************************************
 107  * Driver data structures
 108  */
 109
 110 /*
 111  * Each command issued to the adapter is managed by a request
 112  * structure.
 113  */
 114 struct ciss_request
 115 {
 116     TAILQ_ENTRY(ciss_request)   cr_link;
 117     int                         cr_onq;         /* which queue we are on */
 118
 119     struct ciss_softc           *cr_sc;         /* controller softc */
 120     void                        *cr_data;       /* data buffer */
 121     u_int32_t                   cr_length;      /* data length */
 122     bus_dmamap_t                cr_datamap;     /* DMA map for data */
 123     int                         cr_tag;
 124     int                         cr_flags;
 125 #define CISS_REQ_MAPPED         (1<<0)          /* data mapped */
 126 #define CISS_REQ_SLEEP          (1<<1)          /* submitter sleeping */
 127 #define CISS_REQ_POLL           (1<<2)          /* submitter polling */
 128 #define CISS_REQ_DATAOUT        (1<<3)          /* data host->adapter */
 129 #define CISS_REQ_DATAIN         (1<<4)          /* data adapter->host */
 130
 131     void                        (* cr_complete)(struct ciss_request *);
 132     void                        *cr_private;
 133 };
 134
 135 /*
 136  * The adapter command structure is defined with a zero-length
 137  * scatter/gather list size.  In practise, we want space for a
 138  * scatter-gather list, and we also want to avoid having commands
 139  * cross page boundaries.
 140  *
 141  * Note that 512 bytes yields 28 scatter/gather entries, or the
 142  * ability to map (26 * PAGE_SIZE) + 2 bytes of data.  On x86, this is
 143  * 104kB.  256 bytes would only yield 12 entries, giving a mere 40kB,
 144  * too small.
 145  */
 146
 147 #define CISS_COMMAND_ALLOC_SIZE         1024    /* XXX tune to get sensible s/g list length */
 148 #define CISS_COMMAND_SG_LENGTH  ((CISS_COMMAND_ALLOC_SIZE - sizeof(struct ciss_command)) \
 149                                  / sizeof(struct ciss_sg_entry))
 150
 151 /*
 152  * Per-logical-drive data.
 153  */
 154 struct ciss_ldrive
 155 {
 156     union ciss_device_address   cl_address;
 157     union ciss_device_address   *cl_controller;
 158     int                         cl_status;
 159 #define CISS_LD_NONEXISTENT     0
 160 #define CISS_LD_ONLINE          1
 161 #define CISS_LD_OFFLINE         2
 162
 163     int                         cl_update;
 164
 165     struct ciss_bmic_id_ldrive  *cl_ldrive;
 166     struct ciss_bmic_id_lstatus *cl_lstatus;
 167     struct ciss_ldrive_geometry cl_geometry;
 168
 169     char                        cl_name[16];            /* device name */
 170 };
 171
 172 /*
 173  * Per-physical-drive data
 174  */
 175 struct ciss_pdrive
 176 {
 177     union ciss_device_address   cp_address;
 178     int                         cp_online;
 179 };
 180
 181 #define CISS_PHYSICAL_SHIFT     5
 182 #define CISS_PHYSICAL_BASE      (1 << CISS_PHYSICAL_SHIFT)
 183 #define CISS_MAX_PHYSTGT        15
 184
 185 #define CISS_IS_PHYSICAL(bus)   (bus >= CISS_PHYSICAL_BASE)
 186 #define CISS_CAM_TO_PBUS(bus)   (bus - CISS_PHYSICAL_BASE)
 187
 188 /*
 189  * Per-adapter data
 190  */
 191 struct ciss_softc
 192 {
 193     /* bus connections */
 194     device_t                    ciss_dev;               /* bus attachment */
 195     cdev_t                      ciss_dev_t;             /* control device */
 196
 197     struct resource             *ciss_regs_resource;    /* register interface window */
 198     int                         ciss_regs_rid;          /* resource ID */
 199     bus_space_handle_t          ciss_regs_bhandle;      /* bus space handle */
 200     bus_space_tag_t             ciss_regs_btag;         /* bus space tag */
 201
 202     struct resource             *ciss_cfg_resource;     /* config struct interface window */
 203     int                         ciss_cfg_rid;           /* resource ID */
 204     struct ciss_config_table    *ciss_cfg;              /* config table in adapter memory */
 205     struct ciss_bmic_id_table   *ciss_id;               /* ID table in host memory */
 206     u_int32_t                   ciss_heartbeat;         /* last heartbeat value */
 207     int                         ciss_heart_attack;      /* number of times we have seen this value */
 208
 209     struct resource             *ciss_irq_resource;     /* interrupt */
 210     int                         ciss_irq_rid;           /* resource ID */
 211     void                        *ciss_intr;             /* interrupt handle */
 212
 213     bus_dma_tag_t               ciss_parent_dmat;       /* parent DMA tag */
 214     bus_dma_tag_t               ciss_buffer_dmat;       /* data buffer/command DMA tag */
 215
 216     u_int32_t                   ciss_interrupt_mask;    /* controller interrupt mask bits */
 217
 218     int                         ciss_max_requests;
 219     struct ciss_request         ciss_request[CISS_MAX_REQUESTS];        /* requests */
 220     void                        *ciss_command;          /* command structures */
 221     bus_dma_tag_t               ciss_command_dmat;      /* command DMA tag */
 222     bus_dmamap_t                ciss_command_map;       /* command DMA map */
 223     u_int32_t                   ciss_command_phys;      /* command array base address */
 224     TAILQ_HEAD(,ciss_request)   ciss_free;              /* requests available for reuse */
 225     TAILQ_HEAD(,ciss_request)   ciss_busy;              /* requests in the adapter */
 226     TAILQ_HEAD(,ciss_request)   ciss_complete;          /* requests which have been returned by the adapter */
 227     TAILQ_HEAD(,ciss_request)   ciss_notify;            /* requests which are defered for processing */
 228     struct thread               *ciss_notify_thread;
 229
 230     struct callout              ciss_periodic;          /* periodic event handling */
 231     struct ciss_request         *ciss_periodic_notify;  /* notify callback request */
 232
 233     struct ciss_ldrive          **ciss_logical;
 234     struct ciss_pdrive          **ciss_physical;
 235     union ciss_device_address   *ciss_controllers;      /* controller address */
 236     int                         ciss_max_bus_number;    /* maximum bus number */
 237     int                         ciss_max_logical_bus;
 238     int                         ciss_max_physical_bus;
 239
 240     struct cam_devq             *ciss_cam_devq;
 241     struct cam_sim              **ciss_cam_sim;
 242
 243     int                         ciss_flags;
 244 #define CISS_FLAG_NOTIFY_OK     (1<<0)          /* notify command running OK */
 245 #define CISS_FLAG_CONTROL_OPEN  (1<<1)          /* control device is open */
 246 #define CISS_FLAG_ABORTING      (1<<2)          /* driver is going away */
 247 #define CISS_FLAG_RUNNING       (1<<3)          /* driver is running (interrupts usable) */
 248
 249 #define CISS_FLAG_FAKE_SYNCH    (1<<16)         /* needs SYNCHRONISE_CACHE faked */
 250 #define CISS_FLAG_BMIC_ABORT    (1<<17)         /* use BMIC command to abort Notify on Event */
 251 #define CISS_FLAG_THREAD_SHUT   (1<<20)         /* shutdown the kthread */
 252
 253     struct ciss_qstat           ciss_qstat[CISSQ_COUNT];        /* queue statistics */
 254 };
 255
 256 /*
 257  * Given a request tag, find the corresponding command in virtual or
 258  * physical space.
 259  *
 260  * The arithmetic here is due to the allocation of ciss_command structures
 261  * inside CISS_COMMAND_ALLOC_SIZE blocks.  See the comment at the definition
 262  * of CISS_COMMAND_ALLOC_SIZE above.
 263  */
 264 #define CISS_FIND_COMMAND(cr)                                                   \
 265         (struct ciss_command *)((u_int8_t *)(cr)->cr_sc->ciss_command +         \
 266                                 ((cr)->cr_tag * CISS_COMMAND_ALLOC_SIZE))
 267 #define CISS_FIND_COMMANDPHYS(cr)       ((cr)->cr_sc->ciss_command_phys + \
 268                                          ((cr)->cr_tag * CISS_COMMAND_ALLOC_SIZE))
 269
 270 /************************************************************************
 271  * Debugging/diagnostic output.
 272  */
 273
 274 /*
 275  * Debugging levels:
 276  *  0 - quiet, only emit warnings
 277  *  1 - talkative, log major events, but nothing on the I/O path
 278  *  2 - noisy, log events on the I/O path
 279  *  3 - extremely noisy, log items in loops
 280  */
 281 #ifdef CISS_DEBUG
 282 # define debug(level, fmt, args...)                                                     \
 283         do {                                                                            \
 284             if (level <= CISS_DEBUG) kprintf("%s: " fmt "\n", __func__ , ##args);       \
 285         } while(0)
 286 # define debug_called(level)                                            \
 287         do {                                                            \
 288             if (level <= CISS_DEBUG) kprintf("%s: called\n", __func__); \
 289         } while(0)
 290 # define debug_struct(s)                kprintf("  SIZE %s: %d\n", #s, sizeof(struct s))
 291 # define debug_union(s)                 kprintf("  SIZE %s: %d\n", #s, sizeof(union s))
 292 # define debug_type(s)                  kprintf("  SIZE %s: %d\n", #s, sizeof(s))
 293 # define debug_field(s, f)              kprintf("  OFFSET %s.%s: %d\n", #s, #f, ((int)&(((struct s *)0)->f)))
 294 # define debug_const(c)                 kprintf("  CONST %s %d/0x%x\n", #c, c, c);
 295 #else
 296 # define debug(level, fmt, args...)
 297 # define debug_called(level)
 298 # define debug_struct(s)
 299 # define debug_union(s)
 300 # define debug_type(s)
 301 # define debug_field(s, f)
 302 # define debug_const(c)
 303 #endif
 304
 305 #define ciss_printf(sc, fmt, args...)   device_printf(sc->ciss_dev, fmt , ##args)
 306
 307 /************************************************************************
 308  * Queue primitives
 309  */
 310
 311 #define CISSQ_ADD(sc, qname)                                    \
 312         do {                                                    \
 313             struct ciss_qstat *qs = &(sc)->ciss_qstat[qname];   \
 314                                                                 \
 315             qs->q_length++;                                     \
 316             if (qs->q_length > qs->q_max)                       \
 317                 qs->q_max = qs->q_length;                       \
 318         } while(0)
 319
 320 #define CISSQ_REMOVE(sc, qname)    (sc)->ciss_qstat[qname].q_length--
 321 #define CISSQ_INIT(sc, qname)                   \
 322         do {                                    \
 323             sc->ciss_qstat[qname].q_length = 0; \
 324             sc->ciss_qstat[qname].q_max = 0;    \
 325         } while(0)
 326
 327
 328 #define CISSQ_REQUEST_QUEUE(name, index)                                \
 329 static __inline void                                                    \
 330 ciss_initq_ ## name (struct ciss_softc *sc)                             \
 331 {                                                                       \
 332     TAILQ_INIT(&sc->ciss_ ## name);                                     \
 333     CISSQ_INIT(sc, index);                                              \
 334 }                                                                       \
 335 static __inline void                                                    \
 336 ciss_enqueue_ ## name (struct ciss_request *cr)                         \
 337 {                                                                       \
 338     crit_enter();                                                       \
 339     TAILQ_INSERT_TAIL(&cr->cr_sc->ciss_ ## name, cr, cr_link);          \
 340     CISSQ_ADD(cr->cr_sc, index);                                        \
 341     cr->cr_onq = index;                                                 \
 342     crit_exit();                                                        \
 343 }                                                                       \
 344 static __inline void                                                    \
 345 ciss_requeue_ ## name (struct ciss_request *cr)                         \
 346 {                                                                       \
 347     crit_enter();                                                       \
 348     TAILQ_INSERT_HEAD(&cr->cr_sc->ciss_ ## name, cr, cr_link);          \
 349     CISSQ_ADD(cr->cr_sc, index);                                        \
 350     cr->cr_onq = index;                                                 \
 351     crit_exit();                                                        \
 352 }                                                                       \
 353 static __inline struct ciss_request *                                   \
 354 ciss_dequeue_ ## name (struct ciss_softc *sc)                           \
 355 {                                                                       \
 356     struct ciss_request *cr;                                            \
 357                                                                         \
 358     crit_enter();                                                       \
 359     if ((cr = TAILQ_FIRST(&sc->ciss_ ## name)) != NULL) {               \
 360         TAILQ_REMOVE(&sc->ciss_ ## name, cr, cr_link);                  \
 361         CISSQ_REMOVE(sc, index);                                        \
 362         cr->cr_onq = -1;                                                \
 363     }                                                                   \
 364     crit_exit();                                                        \
 365     return(cr);                                                         \
 366 }                                                                       \
 367 static __inline int                                                     \
 368 ciss_remove_ ## name (struct ciss_request *cr)                          \
 369 {                                                                       \
 370     int                 error;                                          \
 371                                                                         \
 372     crit_enter();                                                       \
 373     if (cr->cr_onq != index) {                                          \
 374         kprintf("request on queue %d (expected %d)\n", cr->cr_onq, index);\
 375         error = 1;                                                      \
 376     } else {                                                            \
 377         TAILQ_REMOVE(&cr->cr_sc->ciss_ ## name, cr, cr_link);           \
 378         CISSQ_REMOVE(cr->cr_sc, index);                                 \
 379         cr->cr_onq = -1;                                                \
 380         error = 0;                                                      \
 381     }                                                                   \
 382     crit_exit();                                                        \
 383     return(error);                                                      \
 384 }                                                                       \
 385 struct hack
 386
 387 CISSQ_REQUEST_QUEUE(free, CISSQ_FREE);
 388 CISSQ_REQUEST_QUEUE(busy, CISSQ_BUSY);
 389 CISSQ_REQUEST_QUEUE(complete, CISSQ_COMPLETE);
 390 CISSQ_REQUEST_QUEUE(notify, CISSQ_NOTIFY);
 391
 392 /********************************************************************************
 393  * space-fill a character string
 394  */
 395 static __inline void
 396 padstr(char *targ, const char *src, int len)
 397 {
 398     while (len-- > 0) {
 399         if (*src != 0) {
 400             *targ++ = *src++;
 401         } else {
 402             *targ++ = ' ';
 403         }
 404     }
 405 }