sys/dev/raid/mly/mlyvar.h

   1 /*-
   2  * Copyright (c) 2000, 2001 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: src/sys/dev/mly/mlyvar.h,v 1.1.2.2 2001/03/05 20:17:24 msmith Exp $
  28  *      $DragonFly: src/sys/dev/raid/mly/mlyvar.h,v 1.5 2005/02/17 13:59:36 joerg Exp $
  29  */
  30
  31 /********************************************************************************
  32  ********************************************************************************
  33                                                      Driver Parameter Definitions
  34  ********************************************************************************
  35  ********************************************************************************/
  36
  37 /*
  38  * The firmware interface allows for a 16-bit command identifier.  A lookup
  39  * table this size (256k) would be too expensive, so we cap ourselves at a
  40  * reasonable limit.
  41  */
  42 #define MLY_MAXCOMMANDS         256     /* max commands per controller */
  43
  44 /*
  45  * The firmware interface allows for a 16-bit s/g list length.  We limit
  46  * ourselves to a reasonable maximum and ensure alignment.
  47  */
  48 #define MLY_MAXSGENTRIES        64      /* max S/G entries, limit 65535 */
  49
  50 /********************************************************************************
  51  ********************************************************************************
  52                                                       Cross-version Compatibility
  53  ********************************************************************************
  54  ********************************************************************************/
  55
  56 #if defined(__FreeBSD__) && __FreeBSD_version >= 500005
  57 # include <sys/taskqueue.h>
  58 #endif
  59
  60 #if defined(__DragonFly__) || __FreeBSD_version <= 500014
  61 # include <machine/clock.h>
  62 # undef offsetof
  63 # define offsetof(type, field) ((size_t)(&((type *)0)->field))
  64 #endif
  65
  66 /********************************************************************************
  67  ********************************************************************************
  68                                                       Driver Variable Definitions
  69  ********************************************************************************
  70  ********************************************************************************/
  71
  72 /*
  73  * Debugging levels:
  74  *  0 - quiet, only emit warnings
  75  *  1 - noisy, emit major function points and things done
  76  *  2 - extremely noisy, emit trace items in loops, etc.
  77  */
  78 #ifdef MLY_DEBUG
  79 # define debug(level, fmt, args...)     do { if (level <= MLY_DEBUG) printf("%s: " fmt "\n", __func__ , ##args); } while(0)
  80 # define debug_called(level)            do { if (level <= MLY_DEBUG) printf(__func__ ": called\n"); } while(0)
  81 # define debug_struct(s)                printf("  SIZE %s: %d\n", #s, sizeof(struct s))
  82 # define debug_union(s)                 printf("  SIZE %s: %d\n", #s, sizeof(union s))
  83 # define debug_field(s, f)              printf("  OFFSET %s.%s: %d\n", #s, #f, ((int)&(((struct s *)0)->f)))
  84 extern void             mly_printstate0(void);
  85 extern struct mly_softc *mly_softc0;
  86 #else
  87 # define debug(level, fmt, args...)
  88 # define debug_called(level)
  89 # define debug_struct(s)
  90 #endif
  91
  92 #define mly_printf(sc, fmt, args...)    device_printf(sc->mly_dev, fmt , ##args)
  93
  94 /*
  95  * Per-device structure, used to save persistent state on devices.
  96  *
  97  * Note that this isn't really Bus/Target/Lun since we don't support
  98  * lun != 0 at this time.
  99  */
 100 struct mly_btl {
 101     int                 mb_flags;
 102 #define MLY_BTL_PHYSICAL        (1<<0)          /* physical device */
 103 #define MLY_BTL_LOGICAL         (1<<1)          /* logical device */
 104 #define MLY_BTL_PROTECTED       (1<<2)          /* device is protected - I/O not allowed */
 105 #define MLY_BTL_RESCAN          (1<<3)          /* device needs to be rescanned */
 106     char                mb_name[16];            /* peripheral attached to this device */
 107     int                 mb_state;               /* see 8.1 */
 108     int                 mb_type;                /* see 8.2 */
 109
 110     /* physical devices only */
 111     int                 mb_speed;               /* interface transfer rate */
 112     int                 mb_width;               /* interface width */
 113 };
 114
 115 /*
 116  * Per-command control structure.
 117  */
 118 struct mly_command {
 119     TAILQ_ENTRY(mly_command)    mc_link;        /* list linkage */
 120
 121     struct mly_softc            *mc_sc;         /* controller that owns us */
 122     u_int16_t                   mc_slot;        /* command slot we occupy */
 123     int                         mc_flags;
 124 #define MLY_CMD_BUSY            (1<<0)          /* command is being run, or ready to run, or not completed */
 125 #define MLY_CMD_COMPLETE        (1<<1)          /* command has been completed */
 126 #define MLY_CMD_MAPPED          (1<<3)          /* command has had its data mapped */
 127 #define MLY_CMD_DATAIN          (1<<4)          /* data moves controller->system */
 128 #define MLY_CMD_DATAOUT         (1<<5)          /* data moves system->controller */
 129     u_int16_t                   mc_status;      /* command completion status */
 130     u_int8_t                    mc_sense;       /* sense data length */
 131     int32_t                     mc_resid;       /* I/O residual count */
 132
 133     union mly_command_packet    *mc_packet;     /* our controller command */
 134     u_int64_t                   mc_packetphys;  /* physical address of the mapped packet */
 135
 136     void                        *mc_data;       /* data buffer */
 137     size_t                      mc_length;      /* data length */
 138     bus_dmamap_t                mc_datamap;     /* DMA map for data */
 139
 140     void        (* mc_complete)(struct mly_command *mc);        /* completion handler */
 141     void        *mc_private;                                    /* caller-private data */
 142
 143 };
 144
 145 /*
 146  * Command slot regulation.
 147  *
 148  * We can't use slot 0 due to the memory mailbox implementation.
 149  */
 150 #define MLY_SLOT_START          1
 151 #define MLY_SLOT_MAX            (MLY_SLOT_START + MLY_MAXCOMMANDS)
 152
 153 /*
 154  * Per-controller structure.
 155  */
 156 struct mly_softc {
 157     /* bus connections */
 158     device_t            mly_dev;
 159     dev_t               mly_dev_t;
 160     struct resource     *mly_regs_resource;     /* register interface window */
 161     int                 mly_regs_rid;           /* resource ID */
 162     bus_space_handle_t  mly_bhandle;            /* bus space handle */
 163     bus_space_tag_t     mly_btag;               /* bus space tag */
 164     bus_dma_tag_t       mly_parent_dmat;        /* parent DMA tag */
 165     bus_dma_tag_t       mly_buffer_dmat;        /* data buffer/command DMA tag */
 166     struct resource     *mly_irq;               /* interrupt */
 167     int                 mly_irq_rid;
 168     void                *mly_intr;              /* interrupt handle */
 169
 170     /* scatter/gather lists and their controller-visible mappings */
 171     struct mly_sg_entry *mly_sg_table;          /* s/g lists */
 172     u_int32_t           mly_sg_busaddr;         /* s/g table base address in bus space */
 173     bus_dma_tag_t       mly_sg_dmat;            /* s/g buffer DMA tag */
 174     bus_dmamap_t        mly_sg_dmamap;          /* map for s/g buffers */
 175
 176     /* controller hardware interface */
 177     int                 mly_hwif;
 178 #define MLY_HWIF_I960RX         0
 179 #define MLY_HWIF_STRONGARM      1
 180     u_int8_t            mly_doorbell_true;      /* xor map to make hardware doorbell 'true' bits into 1s */
 181     u_int8_t            mly_command_mailbox;    /* register offsets */
 182     u_int8_t            mly_status_mailbox;
 183     u_int8_t            mly_idbr;
 184     u_int8_t            mly_odbr;
 185     u_int8_t            mly_error_status;
 186     u_int8_t            mly_interrupt_status;
 187     u_int8_t            mly_interrupt_mask;
 188     struct mly_mmbox    *mly_mmbox;                     /* kernel-space address of memory mailbox */
 189     u_int64_t           mly_mmbox_busaddr;              /* bus-space address of memory mailbox */
 190     bus_dma_tag_t       mly_mmbox_dmat;                 /* memory mailbox DMA tag */
 191     bus_dmamap_t        mly_mmbox_dmamap;               /* memory mailbox DMA map */
 192     u_int32_t           mly_mmbox_command_index;        /* next index to use */
 193     u_int32_t           mly_mmbox_status_index;         /* index we next expect status at */
 194
 195     /* controller features, limits and status */
 196     int                 mly_state;
 197 #define MLY_STATE_SUSPEND       (1<<0)
 198 #define MLY_STATE_OPEN          (1<<1)
 199 #define MLY_STATE_INTERRUPTS_ON (1<<2)
 200 #define MLY_STATE_MMBOX_ACTIVE  (1<<3)
 201     struct mly_ioctl_getcontrollerinfo  *mly_controllerinfo;
 202     struct mly_param_controller         *mly_controllerparam;
 203     struct mly_btl                      mly_btl[MLY_MAX_CHANNELS][MLY_MAX_TARGETS];
 204
 205     /* command management */
 206     struct mly_command          mly_command[MLY_MAXCOMMANDS];   /* commands */
 207     union mly_command_packet    *mly_packet;            /* command packets */
 208     bus_dma_tag_t               mly_packet_dmat;        /* packet DMA tag */
 209     bus_dmamap_t                mly_packetmap;          /* packet DMA map */
 210     u_int64_t                   mly_packetphys;         /* packet array base address */
 211     TAILQ_HEAD(,mly_command)    mly_free;               /* commands available for reuse */
 212     TAILQ_HEAD(,mly_command)    mly_ready;              /* commands ready to be submitted */
 213     TAILQ_HEAD(,mly_command)    mly_busy;
 214     TAILQ_HEAD(,mly_command)    mly_complete;           /* commands which have been returned by the controller */
 215     struct mly_qstat            mly_qstat[MLYQ_COUNT];  /* queue statistics */
 216
 217     /* health monitoring */
 218     u_int32_t                   mly_event_change;       /* event status change indicator */
 219     u_int32_t                   mly_event_counter;      /* next event for which we anticpiate status */
 220     u_int32_t                   mly_event_waiting;      /* next event the controller will post status for */
 221     struct callout              mly_periodic;           /* periodic event handling */
 222
 223     /* CAM connection */
 224     TAILQ_HEAD(,ccb_hdr)        mly_cam_ccbq;                   /* outstanding I/O from CAM */
 225     struct cam_sim              *mly_cam_sim[MLY_MAX_CHANNELS];
 226     int                         mly_cam_lowbus;
 227
 228 #if defined(__FreeBSD__) && __FreeBSD_version >= 500005
 229     /* command-completion task */
 230     struct task         mly_task_complete;      /* deferred-completion task */
 231 #endif
 232 };
 233
 234 /*
 235  * Register access helpers.
 236  */
 237 #define MLY_SET_REG(sc, reg, val)       bus_space_write_1(sc->mly_btag, sc->mly_bhandle, reg, val)
 238 #define MLY_GET_REG(sc, reg)            bus_space_read_1 (sc->mly_btag, sc->mly_bhandle, reg)
 239 #define MLY_GET_REG2(sc, reg)           bus_space_read_2 (sc->mly_btag, sc->mly_bhandle, reg)
 240 #define MLY_GET_REG4(sc, reg)           bus_space_read_4 (sc->mly_btag, sc->mly_bhandle, reg)
 241
 242 #define MLY_SET_MBOX(sc, mbox, ptr)                                                                     \
 243         do {                                                                                            \
 244             bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox,      *((u_int32_t *)ptr));           \
 245             bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox +  4, *((u_int32_t *)ptr + 1));       \
 246             bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox +  8, *((u_int32_t *)ptr + 2));       \
 247             bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox + 12, *((u_int32_t *)ptr + 3));       \
 248         } while(0);
 249 #define MLY_GET_MBOX(sc, mbox, ptr)                                                                     \
 250         do {                                                                                            \
 251             *((u_int32_t *)ptr) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox);                \
 252             *((u_int32_t *)ptr + 1) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox + 4);        \
 253             *((u_int32_t *)ptr + 2) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox + 8);        \
 254             *((u_int32_t *)ptr + 3) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox + 12);       \
 255         } while(0);
 256
 257 #define MLY_IDBR_TRUE(sc, mask)                                                         \
 258         ((((MLY_GET_REG((sc), (sc)->mly_idbr)) ^ (sc)->mly_doorbell_true) & (mask)) == (mask))
 259 #define MLY_ODBR_TRUE(sc, mask)                                                         \
 260         ((MLY_GET_REG((sc), (sc)->mly_odbr) & (mask)) == (mask))
 261 #define MLY_ERROR_VALID(sc)                                                             \
 262         ((((MLY_GET_REG((sc), (sc)->mly_error_status)) ^ (sc)->mly_doorbell_true) & (MLY_MSG_EMPTY)) == 0)
 263
 264 #define MLY_MASK_INTERRUPTS(sc)                                                         \
 265         do {                                                                            \
 266             MLY_SET_REG((sc), (sc)->mly_interrupt_mask, MLY_INTERRUPT_MASK_DISABLE);    \
 267             sc->mly_state &= ~MLY_STATE_INTERRUPTS_ON;                                  \
 268         } while(0);
 269 #define MLY_UNMASK_INTERRUPTS(sc)                                                       \
 270         do {                                                                            \
 271             MLY_SET_REG((sc), (sc)->mly_interrupt_mask, MLY_INTERRUPT_MASK_ENABLE);     \
 272             sc->mly_state |= MLY_STATE_INTERRUPTS_ON;                                   \
 273         } while(0);
 274
 275 /*
 276  * Logical device number -> bus/target translation
 277  */
 278 #define MLY_LOGDEV_BUS(sc, x)   (((x) / MLY_MAX_TARGETS) + (sc)->mly_controllerinfo->physical_channels_present)
 279 #define MLY_LOGDEV_TARGET(x)    ((x) % MLY_MAX_TARGETS)
 280
 281 /*
 282  * Public functions/variables
 283  */
 284 /* mly.c */
 285 extern int      mly_attach(struct mly_softc *sc);
 286 extern void     mly_detach(struct mly_softc *sc);
 287 extern void     mly_free(struct mly_softc *sc);
 288 extern void     mly_startio(struct mly_softc *sc);
 289 extern void     mly_done(struct mly_softc *sc);
 290 extern int      mly_alloc_command(struct mly_softc *sc, struct mly_command **mcp);
 291 extern void     mly_release_command(struct mly_command *mc);
 292
 293 /* mly_cam.c */
 294 extern int      mly_cam_attach(struct mly_softc *sc);
 295 extern void     mly_cam_detach(struct mly_softc *sc);
 296 extern int      mly_cam_command(struct mly_softc *sc, struct mly_command **mcp);
 297 extern int      mly_name_device(struct mly_softc *sc, int bus, int target);
 298
 299 /********************************************************************************
 300  * Queue primitives
 301  */
 302
 303 #define MLYQ_ADD(sc, qname)                                     \
 304         do {                                                    \
 305             struct mly_qstat *qs = &(sc)->mly_qstat[qname];     \
 306                                                                 \
 307             qs->q_length++;                                     \
 308             if (qs->q_length > qs->q_max)                       \
 309                 qs->q_max = qs->q_length;                       \
 310         } while(0)
 311
 312 #define MLYQ_REMOVE(sc, qname)    (sc)->mly_qstat[qname].q_length--
 313 #define MLYQ_INIT(sc, qname)                    \
 314         do {                                    \
 315             sc->mly_qstat[qname].q_length = 0;  \
 316             sc->mly_qstat[qname].q_max = 0;     \
 317         } while(0)
 318
 319
 320 #define MLYQ_COMMAND_QUEUE(name, index)                                 \
 321 static __inline void                                                    \
 322 mly_initq_ ## name (struct mly_softc *sc)                               \
 323 {                                                                       \
 324     TAILQ_INIT(&sc->mly_ ## name);                                      \
 325     MLYQ_INIT(sc, index);                                               \
 326 }                                                                       \
 327 static __inline void                                                    \
 328 mly_enqueue_ ## name (struct mly_command *mc)                           \
 329 {                                                                       \
 330     int         s;                                                      \
 331                                                                         \
 332     s = splcam();                                                       \
 333     TAILQ_INSERT_TAIL(&mc->mc_sc->mly_ ## name, mc, mc_link);           \
 334     MLYQ_ADD(mc->mc_sc, index);                                         \
 335     splx(s);                                                            \
 336 }                                                                       \
 337 static __inline void                                                    \
 338 mly_requeue_ ## name (struct mly_command *mc)                           \
 339 {                                                                       \
 340     int         s;                                                      \
 341                                                                         \
 342     s = splcam();                                                       \
 343     TAILQ_INSERT_HEAD(&mc->mc_sc->mly_ ## name, mc, mc_link);           \
 344     MLYQ_ADD(mc->mc_sc, index);                                         \
 345     splx(s);                                                            \
 346 }                                                                       \
 347 static __inline struct mly_command *                                    \
 348 mly_dequeue_ ## name (struct mly_softc *sc)                             \
 349 {                                                                       \
 350     struct mly_command  *mc;                                            \
 351     int                 s;                                              \
 352                                                                         \
 353     s = splcam();                                                       \
 354     if ((mc = TAILQ_FIRST(&sc->mly_ ## name)) != NULL) {                \
 355         TAILQ_REMOVE(&sc->mly_ ## name, mc, mc_link);                   \
 356         MLYQ_REMOVE(sc, index);                                         \
 357     }                                                                   \
 358     splx(s);                                                            \
 359     return(mc);                                                         \
 360 }                                                                       \
 361 static __inline void                                                    \
 362 mly_remove_ ## name (struct mly_command *mc)                            \
 363 {                                                                       \
 364     int                 s;                                              \
 365                                                                         \
 366     s = splcam();                                                       \
 367     TAILQ_REMOVE(&mc->mc_sc->mly_ ## name, mc, mc_link);                \
 368     MLYQ_REMOVE(mc->mc_sc, index);                                      \
 369     splx(s);                                                            \
 370 }                                                                       \
 371 struct hack
 372
 373 MLYQ_COMMAND_QUEUE(free, MLYQ_FREE);
 374 MLYQ_COMMAND_QUEUE(ready, MLYQ_READY);
 375 MLYQ_COMMAND_QUEUE(busy, MLYQ_BUSY);
 376 MLYQ_COMMAND_QUEUE(complete, MLYQ_COMPLETE);
 377