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 1.9 2008/01/21 02:27:37 pavalos Exp $
  29  */
  30
  31 #include <sys/thread2.h>
  32
  33 /********************************************************************************
  34  ********************************************************************************
  35                                                      Driver Parameter Definitions
  36  ********************************************************************************
  37  ********************************************************************************/
  38
  39 /*
  40  * The firmware interface allows for a 16-bit command identifier.  A lookup
  41  * table this size (256k) would be too expensive, so we cap ourselves at a
  42  * reasonable limit.
  43  */
  44 #define MLY_MAX_COMMANDS        256     /* max commands per controller */
  45
  46 /*
  47  * The firmware interface allows for a 16-bit s/g list length.  We limit
  48  * ourselves to a reasonable maximum and ensure alignment.
  49  */
  50 #define MLY_MAX_SGENTRIES       64      /* max S/G entries, limit 65535 */
  51
  52 /*
  53  * The interval at which we poke the controller for status updates (in seconds).
  54  */
  55 #define MLY_PERIODIC_INTERVAL   1
  56
  57 /********************************************************************************
  58  ********************************************************************************
  59                                                       Cross-version Compatibility
  60  ********************************************************************************
  61  ********************************************************************************/
  62
  63 # include <sys/taskqueue.h>
  64
  65 #ifndef INTR_ENTROPY
  66 # define INTR_ENTROPY 0
  67 #endif
  68
  69 /********************************************************************************
  70  ********************************************************************************
  71                                                       Driver Variable Definitions
  72  ********************************************************************************
  73  ********************************************************************************/
  74
  75 /*
  76  * Debugging levels:
  77  *  0 - quiet, only emit warnings
  78  *  1 - noisy, emit major function points and things done
  79  *  2 - extremely noisy, emit trace items in loops, etc.
  80  */
  81 #ifdef MLY_DEBUG
  82 # define debug(level, fmt, args...)     do { if (level <= MLY_DEBUG) kprintf("%s: " fmt "\n", __func__ , ##args); } while(0)
  83 # define debug_called(level)            do { if (level <= MLY_DEBUG) kprintf(__func__ ": called\n"); } while(0)
  84 # define debug_struct(s)                kprintf("  SIZE %s: %d\n", #s, sizeof(struct s))
  85 # define debug_union(s)                 kprintf("  SIZE %s: %d\n", #s, sizeof(union s))
  86 # define debug_field(s, f)              kprintf("  OFFSET %s.%s: %d\n", #s, #f, ((int)&(((struct s *)0)->f)))
  87 extern void             mly_printstate0(void);
  88 extern struct mly_softc *mly_softc0;
  89 #else
  90 # define debug(level, fmt, args...)
  91 # define debug_called(level)
  92 # define debug_struct(s)
  93 #endif
  94
  95 #define mly_printf(sc, fmt, args...)    device_printf(sc->mly_dev, fmt , ##args)
  96
  97 /*
  98  * Per-device structure, used to save persistent state on devices.
  99  *
 100  * Note that this isn't really Bus/Target/Lun since we don't support
 101  * lun != 0 at this time.
 102  */
 103 struct mly_btl {
 104     int                 mb_flags;
 105 #define MLY_BTL_PHYSICAL        (1<<0)          /* physical device */
 106 #define MLY_BTL_LOGICAL         (1<<1)          /* logical device */
 107 #define MLY_BTL_PROTECTED       (1<<2)          /* device is protected - I/O not allowed */
 108 #define MLY_BTL_RESCAN          (1<<3)          /* device needs to be rescanned */
 109     char                mb_name[16];            /* peripheral attached to this device */
 110     int                 mb_state;               /* see 8.1 */
 111     int                 mb_type;                /* see 8.2 */
 112
 113     /* physical devices only */
 114     int                 mb_speed;               /* interface transfer rate */
 115     int                 mb_width;               /* interface width */
 116 };
 117
 118 /*
 119  * Per-command control structure.
 120  */
 121 struct mly_command {
 122     TAILQ_ENTRY(mly_command)    mc_link;        /* list linkage */
 123
 124     struct mly_softc            *mc_sc;         /* controller that owns us */
 125     u_int16_t                   mc_slot;        /* command slot we occupy */
 126     int                         mc_flags;
 127 #define MLY_CMD_BUSY            (1<<0)          /* command is being run, or ready to run, or not completed */
 128 #define MLY_CMD_COMPLETE        (1<<1)          /* command has been completed */
 129 #define MLY_CMD_MAPPED          (1<<3)          /* command has had its data mapped */
 130 #define MLY_CMD_DATAIN          (1<<4)          /* data moves controller->system */
 131 #define MLY_CMD_DATAOUT         (1<<5)          /* data moves system->controller */
 132     u_int16_t                   mc_status;      /* command completion status */
 133     u_int8_t                    mc_sense;       /* sense data length */
 134     int32_t                     mc_resid;       /* I/O residual count */
 135
 136     union mly_command_packet    *mc_packet;     /* our controller command */
 137     u_int64_t                   mc_packetphys;  /* physical address of the mapped packet */
 138
 139     void                        *mc_data;       /* data buffer */
 140     size_t                      mc_length;      /* data length */
 141     bus_dmamap_t                mc_datamap;     /* DMA map for data */
 142
 143     void        (* mc_complete)(struct mly_command *mc);        /* completion handler */
 144     void        *mc_private;                                    /* caller-private data */
 145
 146     int                         mc_timestamp;
 147 };
 148
 149 /*
 150  * Command slot regulation.
 151  *
 152  * We can't use slot 0 due to the memory mailbox implementation.
 153  */
 154 #define MLY_SLOT_START          1
 155 #define MLY_SLOT_MAX            (MLY_SLOT_START + MLY_MAX_COMMANDS)
 156
 157 /*
 158  * Per-controller structure.
 159  */
 160 struct mly_softc {
 161     /* bus connections */
 162     device_t            mly_dev;
 163     cdev_t              mly_dev_t;
 164     struct resource     *mly_regs_resource;     /* register interface window */
 165     int                 mly_regs_rid;           /* resource ID */
 166     bus_space_handle_t  mly_bhandle;            /* bus space handle */
 167     bus_space_tag_t     mly_btag;               /* bus space tag */
 168     bus_dma_tag_t       mly_parent_dmat;        /* parent DMA tag */
 169     bus_dma_tag_t       mly_buffer_dmat;        /* data buffer/command DMA tag */
 170     struct resource     *mly_irq;               /* interrupt */
 171     int                 mly_irq_rid;
 172     void                *mly_intr;              /* interrupt handle */
 173
 174     /* scatter/gather lists and their controller-visible mappings */
 175     struct mly_sg_entry *mly_sg_table;          /* s/g lists */
 176     u_int32_t           mly_sg_busaddr;         /* s/g table base address in bus space */
 177     bus_dma_tag_t       mly_sg_dmat;            /* s/g buffer DMA tag */
 178     bus_dmamap_t        mly_sg_dmamap;          /* map for s/g buffers */
 179
 180     /* controller hardware interface */
 181     int                 mly_hwif;
 182 #define MLY_HWIF_I960RX         0
 183 #define MLY_HWIF_STRONGARM      1
 184     u_int8_t            mly_doorbell_true;      /* xor map to make hardware doorbell 'true' bits into 1s */
 185     u_int8_t            mly_command_mailbox;    /* register offsets */
 186     u_int8_t            mly_status_mailbox;
 187     u_int8_t            mly_idbr;
 188     u_int8_t            mly_odbr;
 189     u_int8_t            mly_error_status;
 190     u_int8_t            mly_interrupt_status;
 191     u_int8_t            mly_interrupt_mask;
 192     struct mly_mmbox    *mly_mmbox;                     /* kernel-space address of memory mailbox */
 193     u_int64_t           mly_mmbox_busaddr;              /* bus-space address of memory mailbox */
 194     bus_dma_tag_t       mly_mmbox_dmat;                 /* memory mailbox DMA tag */
 195     bus_dmamap_t        mly_mmbox_dmamap;               /* memory mailbox DMA map */
 196     u_int32_t           mly_mmbox_command_index;        /* next index to use */
 197     u_int32_t           mly_mmbox_status_index;         /* index we next expect status at */
 198
 199     /* controller features, limits and status */
 200     int                 mly_state;
 201 #define MLY_STATE_OPEN          (1<<1)
 202 #define MLY_STATE_INTERRUPTS_ON (1<<2)
 203 #define MLY_STATE_MMBOX_ACTIVE  (1<<3)
 204 #define MLY_STATE_CAM_FROZEN    (1<<4)
 205     struct mly_ioctl_getcontrollerinfo  *mly_controllerinfo;
 206     struct mly_param_controller         *mly_controllerparam;
 207     struct mly_btl                      mly_btl[MLY_MAX_CHANNELS][MLY_MAX_TARGETS];
 208
 209     /* command management */
 210     struct mly_command          mly_command[MLY_MAX_COMMANDS];  /* commands */
 211     union mly_command_packet    *mly_packet;            /* command packets */
 212     bus_dma_tag_t               mly_packet_dmat;        /* packet DMA tag */
 213     bus_dmamap_t                mly_packetmap;          /* packet DMA map */
 214     u_int64_t                   mly_packetphys;         /* packet array base address */
 215     TAILQ_HEAD(,mly_command)    mly_free;               /* commands available for reuse */
 216     TAILQ_HEAD(,mly_command)    mly_busy;
 217     TAILQ_HEAD(,mly_command)    mly_complete;           /* commands which have been returned by the controller */
 218     struct mly_qstat            mly_qstat[MLYQ_COUNT];  /* queue statistics */
 219
 220     /* health monitoring */
 221     u_int32_t                   mly_event_change;       /* event status change indicator */
 222     u_int32_t                   mly_event_counter;      /* next event for which we anticpiate status */
 223     u_int32_t                   mly_event_waiting;      /* next event the controller will post status for */
 224     struct callout              mly_periodic;           /* periodic event handling */
 225     struct callout              mly_timeout;            /* timeout event handling */
 226
 227     /* CAM connection */
 228     struct cam_devq             *mly_cam_devq;                  /* CAM device queue */
 229     struct cam_sim              *mly_cam_sim[MLY_MAX_CHANNELS]; /* CAM SIMs */
 230     struct cam_path             *mly_cam_path;                  /* rescan path */
 231     int                         mly_cam_channels;               /* total channel count */
 232
 233     /* command-completion task */
 234     struct task                 mly_task_complete;      /* deferred-completion task */
 235     int                         mly_qfrzn_cnt;          /* Track simq freezes */
 236 };
 237
 238 /*
 239  * Register access helpers.
 240  */
 241 #define MLY_SET_REG(sc, reg, val)       bus_space_write_1(sc->mly_btag, sc->mly_bhandle, reg, val)
 242 #define MLY_GET_REG(sc, reg)            bus_space_read_1 (sc->mly_btag, sc->mly_bhandle, reg)
 243 #define MLY_GET_REG2(sc, reg)           bus_space_read_2 (sc->mly_btag, sc->mly_bhandle, reg)
 244 #define MLY_GET_REG4(sc, reg)           bus_space_read_4 (sc->mly_btag, sc->mly_bhandle, reg)
 245
 246 #define MLY_SET_MBOX(sc, mbox, ptr)                                                                     \
 247         do {                                                                                            \
 248             bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox,      *((u_int32_t *)ptr));           \
 249             bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox +  4, *((u_int32_t *)ptr + 1));       \
 250             bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox +  8, *((u_int32_t *)ptr + 2));       \
 251             bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox + 12, *((u_int32_t *)ptr + 3));       \
 252         } while(0);
 253 #define MLY_GET_MBOX(sc, mbox, ptr)                                                                     \
 254         do {                                                                                            \
 255             *((u_int32_t *)ptr) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox);                \
 256             *((u_int32_t *)ptr + 1) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox + 4);        \
 257             *((u_int32_t *)ptr + 2) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox + 8);        \
 258             *((u_int32_t *)ptr + 3) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox + 12);       \
 259         } while(0);
 260
 261 #define MLY_IDBR_TRUE(sc, mask)                                                         \
 262         ((((MLY_GET_REG((sc), (sc)->mly_idbr)) ^ (sc)->mly_doorbell_true) & (mask)) == (mask))
 263 #define MLY_ODBR_TRUE(sc, mask)                                                         \
 264         ((MLY_GET_REG((sc), (sc)->mly_odbr) & (mask)) == (mask))
 265 #define MLY_ERROR_VALID(sc)                                                             \
 266         ((((MLY_GET_REG((sc), (sc)->mly_error_status)) ^ (sc)->mly_doorbell_true) & (MLY_MSG_EMPTY)) == 0)
 267
 268 #define MLY_MASK_INTERRUPTS(sc)                                                         \
 269         do {                                                                            \
 270             MLY_SET_REG((sc), (sc)->mly_interrupt_mask, MLY_INTERRUPT_MASK_DISABLE);    \
 271             sc->mly_state &= ~MLY_STATE_INTERRUPTS_ON;                                  \
 272         } while(0);
 273 #define MLY_UNMASK_INTERRUPTS(sc)                                                       \
 274         do {                                                                            \
 275             MLY_SET_REG((sc), (sc)->mly_interrupt_mask, MLY_INTERRUPT_MASK_ENABLE);     \
 276             sc->mly_state |= MLY_STATE_INTERRUPTS_ON;                                   \
 277         } while(0);
 278
 279 /*
 280  * Bus/target/logical ID-related macros.
 281  */
 282 #define MLY_LOGDEV_ID(sc, bus, target)  (((bus) - (sc)->mly_controllerinfo->physical_channels_present) * \
 283                                          MLY_MAX_TARGETS + (target))
 284 #define MLY_LOGDEV_BUS(sc, logdev)      (((logdev) / MLY_MAX_TARGETS) + \
 285                                          (sc)->mly_controllerinfo->physical_channels_present)
 286 #define MLY_LOGDEV_TARGET(sc, logdev)   ((logdev) % MLY_MAX_TARGETS)
 287 #define MLY_BUS_IS_VIRTUAL(sc, bus)     ((bus) >= (sc)->mly_controllerinfo->physical_channels_present)
 288 #define MLY_BUS_IS_VALID(sc, bus)       (((bus) < (sc)->mly_cam_channels) && ((sc)->mly_cam_sim[(bus)] != NULL))
 289
 290 /********************************************************************************
 291  * Queue primitives
 292  */
 293
 294 #define MLYQ_ADD(sc, qname)                                     \
 295         do {                                                    \
 296             struct mly_qstat *qs = &(sc)->mly_qstat[qname];     \
 297                                                                 \
 298             qs->q_length++;                                     \
 299             if (qs->q_length > qs->q_max)                       \
 300                 qs->q_max = qs->q_length;                       \
 301         } while(0)
 302
 303 #define MLYQ_REMOVE(sc, qname)    (sc)->mly_qstat[qname].q_length--
 304 #define MLYQ_INIT(sc, qname)                    \
 305         do {                                    \
 306             sc->mly_qstat[qname].q_length = 0;  \
 307             sc->mly_qstat[qname].q_max = 0;     \
 308         } while(0)
 309
 310
 311 #define MLYQ_COMMAND_QUEUE(name, index)                                 \
 312 static __inline void                                                    \
 313 mly_initq_ ## name (struct mly_softc *sc)                               \
 314 {                                                                       \
 315     TAILQ_INIT(&sc->mly_ ## name);                                      \
 316     MLYQ_INIT(sc, index);                                               \
 317 }                                                                       \
 318 static __inline void                                                    \
 319 mly_enqueue_ ## name (struct mly_command *mc)                           \
 320 {                                                                       \
 321     crit_enter();                                                       \
 322     TAILQ_INSERT_TAIL(&mc->mc_sc->mly_ ## name, mc, mc_link);           \
 323     MLYQ_ADD(mc->mc_sc, index);                                         \
 324     crit_exit();                                                        \
 325 }                                                                       \
 326 static __inline void                                                    \
 327 mly_requeue_ ## name (struct mly_command *mc)                           \
 328 {                                                                       \
 329     crit_enter();                                                       \
 330     TAILQ_INSERT_HEAD(&mc->mc_sc->mly_ ## name, mc, mc_link);           \
 331     MLYQ_ADD(mc->mc_sc, index);                                         \
 332     crit_exit();                                                        \
 333 }                                                                       \
 334 static __inline struct mly_command *                                    \
 335 mly_dequeue_ ## name (struct mly_softc *sc)                             \
 336 {                                                                       \
 337     struct mly_command  *mc;                                            \
 338                                                                         \
 339     crit_enter();                                                       \
 340     if ((mc = TAILQ_FIRST(&sc->mly_ ## name)) != NULL) {                \
 341         TAILQ_REMOVE(&sc->mly_ ## name, mc, mc_link);                   \
 342         MLYQ_REMOVE(sc, index);                                         \
 343     }                                                                   \
 344     crit_exit();                                                        \
 345     return(mc);                                                         \
 346 }                                                                       \
 347 static __inline void                                                    \
 348 mly_remove_ ## name (struct mly_command *mc)                            \
 349 {                                                                       \
 350     crit_enter();                                                       \
 351     TAILQ_REMOVE(&mc->mc_sc->mly_ ## name, mc, mc_link);                \
 352     MLYQ_REMOVE(mc->mc_sc, index);                                      \
 353     crit_exit();                                                        \
 354 }                                                                       \
 355 struct hack
 356
 357 MLYQ_COMMAND_QUEUE(free, MLYQ_FREE);
 358 MLYQ_COMMAND_QUEUE(busy, MLYQ_BUSY);
 359 MLYQ_COMMAND_QUEUE(complete, MLYQ_COMPLETE);
 360
 361 /********************************************************************************
 362  * space-fill a character string
 363  */
 364 static __inline void
 365 padstr(char *targ, char *src, int len)
 366 {
 367     while (len-- > 0) {
 368         if (*src != 0) {
 369             *targ++ = *src++;
 370         } else {
 371             *targ++ = ' ';
 372         }
 373     }
 374 }