sys/dev/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  *      $FreeBSD$
  27  */
  28
  29 /*
  30  * CISS adapter driver datastructures
  31  */
  32
  33 typedef STAILQ_HEAD(, ciss_request)     cr_qhead_t;
  34
  35 /************************************************************************
  36  * Tunable parameters
  37  */
  38
  39 /*
  40  * There is no guaranteed upper bound on the number of concurrent
  41  * commands an adapter may claim to support.  Cap it at a reasonable
  42  * value.
  43  */
  44 #define CISS_MAX_REQUESTS       1024
  45
  46 /*
  47  * Maximum number of logical drives we support.
  48  * If the controller does not indicate a maximum
  49  * value.  This is a compatibiliy value to support
  50  * older ciss controllers (e.g. model 6i)
  51  */
  52 #define CISS_MAX_LOGICAL        16
  53
  54 /*
  55  * Maximum number of physical devices we support.
  56  */
  57 #define CISS_MAX_PHYSICAL       1024
  58
  59 /*
  60  * Interrupt reduction can be controlled by tuning the interrupt
  61  * coalesce delay and count paramters.  The delay (in microseconds)
  62  * defers delivery of interrupts to increase the chance of there being
  63  * more than one completed command ready when the interrupt is
  64  * delivered.  The count expedites the delivery of the interrupt when
  65  * the given number of commands are ready.
  66  *
  67  * If the delay is set to 0, interrupts are delivered immediately.
  68  */
  69 #define CISS_INTERRUPT_COALESCE_DELAY   0
  70 #define CISS_INTERRUPT_COALESCE_COUNT   16
  71
  72 /*
  73  * Heartbeat routine timeout in seconds.  Note that since event
  74  * handling is performed on a callback basis, we don't need this to
  75  * run very often.
  76  */
  77 #define CISS_HEARTBEAT_RATE             10
  78
  79 /************************************************************************
  80  * Compatibility with older versions of FreeBSD
  81  */
  82 #if __FreeBSD_version < 440001
  83 #warning testing old-FreeBSD compat
  84 typedef struct proc     d_thread_t;
  85 #endif
  86
  87 /************************************************************************
  88  * Driver version.  Only really significant to the ACU interface.
  89  */
  90 #define CISS_DRIVER_VERSION     20011201
  91
  92 /************************************************************************
  93  * Driver data structures
  94  */
  95
  96 /*
  97  * Each command issued to the adapter is managed by a request
  98  * structure.
  99  */
 100 struct ciss_request
 101 {
 102     STAILQ_ENTRY(ciss_request)  cr_link;
 103     int                         cr_onq;         /* which queue we are on */
 104
 105     struct ciss_softc           *cr_sc;         /* controller softc */
 106     void                        *cr_data;       /* data buffer */
 107     u_int32_t                   cr_length;      /* data length */
 108     bus_dmamap_t                cr_datamap;     /* DMA map for data */
 109     struct ciss_command         *cr_cc;
 110     uint32_t                    cr_ccphys;
 111     int                         cr_tag;
 112     int                         cr_flags;
 113 #define CISS_REQ_MAPPED         (1<<0)          /* data mapped */
 114 #define CISS_REQ_SLEEP          (1<<1)          /* submitter sleeping */
 115 #define CISS_REQ_POLL           (1<<2)          /* submitter polling */
 116 #define CISS_REQ_DATAOUT        (1<<3)          /* data host->adapter */
 117 #define CISS_REQ_DATAIN         (1<<4)          /* data adapter->host */
 118 #define CISS_REQ_BUSY           (1<<5)          /* controller has req */
 119 #define CISS_REQ_CCB            (1<<6)          /* data is ccb */
 120
 121     void                        (* cr_complete)(struct ciss_request *);
 122     void                        *cr_private;
 123     int                         cr_sg_tag;
 124 #define CISS_SG_MAX             ((CISS_SG_FETCH_MAX << 1) | 0x1)
 125 #define CISS_SG_1               ((CISS_SG_FETCH_1 << 1) | 0x01)
 126 #define CISS_SG_2               ((CISS_SG_FETCH_2 << 1) | 0x01)
 127 #define CISS_SG_4               ((CISS_SG_FETCH_4 << 1) | 0x01)
 128 #define CISS_SG_8               ((CISS_SG_FETCH_8 << 1) | 0x01)
 129 #define CISS_SG_16              ((CISS_SG_FETCH_16 << 1) | 0x01)
 130 #define CISS_SG_32              ((CISS_SG_FETCH_32 << 1) | 0x01)
 131 #define CISS_SG_NONE            ((CISS_SG_FETCH_NONE << 1) | 0x01)
 132 };
 133
 134 /*
 135  * The adapter command structure is defined with a zero-length
 136  * scatter/gather list size.  In practise, we want space for a
 137  * scatter-gather list, and we also want to avoid having commands
 138  * cross page boundaries.
 139  *
 140  * The size of the ciss_command is 52 bytes.  65 s/g elements are reserved
 141  * to allow a max i/o size of 256k.  This gives a total command size of
 142  * 1120 bytes, including the 32 byte alignment padding.  Modern controllers
 143  * seem to saturate nicely at this value.
 144  */
 145
 146 #define CISS_MAX_SG_ELEMENTS    65
 147 #define CISS_COMMAND_ALIGN      32
 148 #define CISS_COMMAND_SG_LENGTH  (sizeof(struct ciss_sg_entry) * CISS_MAX_SG_ELEMENTS)
 149 #define CISS_COMMAND_ALLOC_SIZE         (roundup2(sizeof(struct ciss_command) + CISS_COMMAND_SG_LENGTH, CISS_COMMAND_ALIGN))
 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        256
 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     struct cdev *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_perf_config     *ciss_perf;             /* config table for the performant */
 206     struct ciss_bmic_id_table   *ciss_id;               /* ID table in host memory */
 207     u_int32_t                   ciss_heartbeat;         /* last heartbeat value */
 208     int                         ciss_heart_attack;      /* number of times we have seen this value */
 209
 210     int                         ciss_msi;
 211     struct resource             *ciss_irq_resource;     /* interrupt */
 212     int                         ciss_irq_rid[CISS_MSI_COUNT];           /* resource ID */
 213     void                        *ciss_intr;             /* interrupt handle */
 214
 215     bus_dma_tag_t               ciss_parent_dmat;       /* parent DMA tag */
 216     bus_dma_tag_t               ciss_buffer_dmat;       /* data buffer/command DMA tag */
 217
 218     u_int32_t                   ciss_interrupt_mask;    /* controller interrupt mask bits */
 219
 220     uint64_t                    *ciss_reply;
 221     int                         ciss_cycle;
 222     int                         ciss_rqidx;
 223     bus_dma_tag_t               ciss_reply_dmat;
 224     bus_dmamap_t                ciss_reply_map;
 225     uint32_t                    ciss_reply_phys;
 226
 227     int                         ciss_max_requests;
 228     struct ciss_request         ciss_request[CISS_MAX_REQUESTS];        /* requests */
 229     void                        *ciss_command;          /* command structures */
 230     bus_dma_tag_t               ciss_command_dmat;      /* command DMA tag */
 231     bus_dmamap_t                ciss_command_map;       /* command DMA map */
 232     u_int32_t                   ciss_command_phys;      /* command array base address */
 233     cr_qhead_t                  ciss_free;              /* requests available for reuse */
 234     cr_qhead_t                  ciss_notify;            /* requests which are defered for processing */
 235     struct proc                 *ciss_notify_thread;
 236
 237     struct callout              ciss_periodic;          /* periodic event handling */
 238     struct ciss_request         *ciss_periodic_notify;  /* notify callback request */
 239
 240     struct mtx                  ciss_mtx;
 241     struct ciss_ldrive          **ciss_logical;
 242     struct ciss_pdrive          **ciss_physical;
 243     union ciss_device_address   *ciss_controllers;      /* controller address */
 244     int                         ciss_max_bus_number;    /* maximum bus number */
 245     int                         ciss_max_logical_bus;
 246     int                         ciss_max_physical_bus;
 247
 248     struct cam_devq             *ciss_cam_devq;
 249     struct cam_sim              **ciss_cam_sim;
 250
 251     int                         ciss_soft_reset;
 252
 253     int                         ciss_flags;
 254 #define CISS_FLAG_NOTIFY_OK     (1<<0)          /* notify command running OK */
 255 #define CISS_FLAG_CONTROL_OPEN  (1<<1)          /* control device is open */
 256 #define CISS_FLAG_ABORTING      (1<<2)          /* driver is going away */
 257 #define CISS_FLAG_RUNNING       (1<<3)          /* driver is running (interrupts usable) */
 258 #define CISS_FLAG_BUSY          (1<<4)          /* no free commands */
 259
 260 #define CISS_FLAG_FAKE_SYNCH    (1<<16)         /* needs SYNCHRONISE_CACHE faked */
 261 #define CISS_FLAG_BMIC_ABORT    (1<<17)         /* use BMIC command to abort Notify on Event */
 262 #define CISS_FLAG_THREAD_SHUT   (1<<20)         /* shutdown the kthread */
 263
 264     struct ciss_qstat           ciss_qstat[CISSQ_COUNT];        /* queue statistics */
 265 };
 266
 267 /************************************************************************
 268  * Debugging/diagnostic output.
 269  */
 270
 271 /*
 272  * Debugging levels:
 273  *  0 - quiet, only emit warnings
 274  *  1 - talkative, log major events, but nothing on the I/O path
 275  *  2 - noisy, log events on the I/O path
 276  *  3 - extremely noisy, log items in loops
 277  */
 278 #ifdef CISS_DEBUG
 279 # define debug(level, fmt, args...)                                                     \
 280         do {                                                                            \
 281             if (level <= CISS_DEBUG) printf("%s: " fmt "\n", __func__ , ##args);        \
 282         } while(0)
 283 # define debug_called(level)                                            \
 284         do {                                                            \
 285             if (level <= CISS_DEBUG) printf("%s: called\n", __func__);  \
 286         } while(0)
 287 # define debug_struct(s)                printf("  SIZE %s: %zu\n", #s, sizeof(struct s))
 288 # define debug_union(s)                 printf("  SIZE %s: %zu\n", #s, sizeof(union s))
 289 # define debug_type(s)                  printf("  SIZE %s: %zu\n", #s, sizeof(s))
 290 # define debug_field(s, f)              printf("  OFFSET %s.%s: %d\n", #s, #f, ((int)&(((struct s *)0)->f)))
 291 # define debug_const(c)                 printf("  CONST %s %jd/0x%jx\n", #c, (intmax_t)c, (intmax_t)c);
 292 #else
 293 # define debug(level, fmt, args...)
 294 # define debug_called(level)
 295 # define debug_struct(s)
 296 # define debug_union(s)
 297 # define debug_type(s)
 298 # define debug_field(s, f)
 299 # define debug_const(c)
 300 #endif
 301
 302 #define ciss_printf(sc, fmt, args...)   device_printf(sc->ciss_dev, fmt , ##args)
 303
 304 /************************************************************************
 305  * Queue primitives
 306  */
 307
 308 #define CISSQ_ADD(sc, qname)                                    \
 309         do {                                                    \
 310             struct ciss_qstat *qs = &(sc)->ciss_qstat[qname];   \
 311                                                                 \
 312             qs->q_length++;                                     \
 313             if (qs->q_length > qs->q_max)                       \
 314                 qs->q_max = qs->q_length;                       \
 315         } while(0)
 316
 317 #define CISSQ_REMOVE(sc, qname)    (sc)->ciss_qstat[qname].q_length--
 318 #define CISSQ_INIT(sc, qname)                   \
 319         do {                                    \
 320             sc->ciss_qstat[qname].q_length = 0; \
 321             sc->ciss_qstat[qname].q_max = 0;    \
 322         } while(0)
 323
 324
 325 #define CISSQ_REQUEST_QUEUE(name, index)                                \
 326 static __inline void                                                    \
 327 ciss_initq_ ## name (struct ciss_softc *sc)                             \
 328 {                                                                       \
 329     STAILQ_INIT(&sc->ciss_ ## name);                                    \
 330     CISSQ_INIT(sc, index);                                              \
 331 }                                                                       \
 332 static __inline void                                                    \
 333 ciss_enqueue_ ## name (struct ciss_request *cr)                         \
 334 {                                                                       \
 335                                                                         \
 336     STAILQ_INSERT_TAIL(&cr->cr_sc->ciss_ ## name, cr, cr_link);         \
 337     CISSQ_ADD(cr->cr_sc, index);                                        \
 338     cr->cr_onq = index;                                                 \
 339 }                                                                       \
 340 static __inline void                                                    \
 341 ciss_requeue_ ## name (struct ciss_request *cr)                         \
 342 {                                                                       \
 343                                                                         \
 344     STAILQ_INSERT_HEAD(&cr->cr_sc->ciss_ ## name, cr, cr_link);         \
 345     CISSQ_ADD(cr->cr_sc, index);                                        \
 346     cr->cr_onq = index;                                                 \
 347 }                                                                       \
 348 static __inline struct ciss_request *                                   \
 349 ciss_dequeue_ ## name (struct ciss_softc *sc)                           \
 350 {                                                                       \
 351     struct ciss_request *cr;                                            \
 352                                                                         \
 353     if ((cr = STAILQ_FIRST(&sc->ciss_ ## name)) != NULL) {              \
 354         STAILQ_REMOVE_HEAD(&sc->ciss_ ## name, cr_link);                \
 355         CISSQ_REMOVE(sc, index);                                        \
 356         cr->cr_onq = -1;                                                \
 357     }                                                                   \
 358     return(cr);                                                         \
 359 }                                                                       \
 360 struct hack
 361
 362 CISSQ_REQUEST_QUEUE(free, CISSQ_FREE);
 363 CISSQ_REQUEST_QUEUE(notify, CISSQ_NOTIFY);
 364
 365 static __inline void
 366 ciss_enqueue_complete(struct ciss_request *ac, cr_qhead_t *head)
 367 {
 368
 369     STAILQ_INSERT_TAIL(head, ac, cr_link);
 370 }
 371
 372 static __inline struct ciss_request *
 373 ciss_dequeue_complete(struct ciss_softc *sc, cr_qhead_t *head)
 374 {
 375     struct ciss_request  *ac;
 376
 377     if ((ac = STAILQ_FIRST(head)) != NULL)
 378         STAILQ_REMOVE_HEAD(head, cr_link);
 379     return(ac);
 380 }
 381
 382 /********************************************************************************
 383  * space-fill a character string
 384  */
 385 static __inline void
 386 padstr(char *targ, const char *src, int len)
 387 {
 388     while (len-- > 0) {
 389         if (*src != 0) {
 390             *targ++ = *src++;
 391         } else {
 392             *targ++ = ' ';
 393         }
 394     }
 395 }
 396
 397 #define ciss_report_request(a, b, c)    \
 398         _ciss_report_request(a, b, c, __FUNCTION__)