sys/bus/firewire/fwmem.c

   1 /*
   2  * Copyright (c) 2002-2003
   3  *      Hidetoshi Shimokawa. 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  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *
  16  *      This product includes software developed by Hidetoshi Shimokawa.
  17  *
  18  * 4. Neither the name of the author nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/sys/bus/firewire/fwmem.c,v 1.16 2008/01/06 16:55:49 swildner Exp $
  35  */
  36
  37 #ifndef __DragonFly__
  38 #include <sys/cdefs.h>
  39 __FBSDID("$FreeBSD: src/sys/dev/firewire/fwmem.c,v 1.26 2004/01/05 14:21:18 simokawa Exp $");
  40 #endif
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/types.h>
  45
  46 #include <sys/kernel.h>
  47 #include <sys/malloc.h>
  48 #include <sys/conf.h>
  49 #include <sys/bus.h>
  50 #include <sys/sysctl.h>
  51 #if defined(__DragonFly__) || __FreeBSD_version < 500000
  52 #include <sys/buf.h>
  53 #else
  54 #include <sys/bio.h>
  55 #endif
  56
  57 #include <sys/signal.h>
  58 #include <sys/mman.h>
  59 #include <sys/fcntl.h>
  60 #include <sys/thread2.h>
  61
  62 #ifdef __DragonFly__
  63 #include "firewire.h"
  64 #include "firewirereg.h"
  65 #include "fwmem.h"
  66 #else
  67 #include <dev/firewire/firewire.h>
  68 #include <dev/firewire/firewirereg.h>
  69 #include <dev/firewire/fwmem.h>
  70 #endif
  71
  72 static int fwmem_speed=2, fwmem_debug=0;
  73 static struct fw_eui64 fwmem_eui64;
  74 SYSCTL_DECL(_hw_firewire);
  75 SYSCTL_NODE(_hw_firewire, OID_AUTO, fwmem, CTLFLAG_RD, 0,
  76         "FireWire Memory Access");
  77 SYSCTL_UINT(_hw_firewire_fwmem, OID_AUTO, eui64_hi, CTLFLAG_RW,
  78         &fwmem_eui64.hi, 0, "Fwmem target EUI64 high");
  79 SYSCTL_UINT(_hw_firewire_fwmem, OID_AUTO, eui64_lo, CTLFLAG_RW,
  80         &fwmem_eui64.lo, 0, "Fwmem target EUI64 low");
  81 SYSCTL_INT(_hw_firewire_fwmem, OID_AUTO, speed, CTLFLAG_RW, &fwmem_speed, 0,
  82         "Fwmem link speed");
  83 SYSCTL_INT(_debug, OID_AUTO, fwmem_debug, CTLFLAG_RW, &fwmem_debug, 0,
  84         "Fwmem driver debug flag");
  85
  86 MALLOC_DEFINE(M_FWMEM, "fwmem", "fwmem/FireWire");
  87
  88 #define MAXLEN (512 << fwmem_speed)
  89
  90 struct fwmem_softc {
  91         struct fw_eui64 eui;
  92         int refcount;
  93 };
  94
  95 static struct fw_xfer *
  96 fwmem_xfer_req(
  97         struct fw_device *fwdev,
  98         caddr_t sc,
  99         int spd,
 100         int slen,
 101         int rlen,
 102         void *hand)
 103 {
 104         struct fw_xfer *xfer;
 105
 106         xfer = fw_xfer_alloc(M_FWMEM);
 107         if (xfer == NULL)
 108                 return NULL;
 109
 110         xfer->fc = fwdev->fc;
 111         xfer->send.hdr.mode.hdr.dst = FWLOCALBUS | fwdev->dst;
 112         if (spd < 0)
 113                 xfer->send.spd = fwdev->speed;
 114         else
 115                 xfer->send.spd = min(spd, fwdev->speed);
 116         xfer->act.hand = hand;
 117         xfer->retry_req = fw_asybusy;
 118         xfer->sc = sc;
 119         xfer->send.pay_len = slen;
 120         xfer->recv.pay_len = rlen;
 121
 122         return xfer;
 123 }
 124
 125 struct fw_xfer *
 126 fwmem_read_quad(
 127         struct fw_device *fwdev,
 128         caddr_t sc,
 129         u_int8_t spd,
 130         u_int16_t dst_hi,
 131         u_int32_t dst_lo,
 132         void *data,
 133         void (*hand)(struct fw_xfer *))
 134 {
 135         struct fw_xfer *xfer;
 136         struct fw_pkt *fp;
 137
 138         xfer = fwmem_xfer_req(fwdev, (void *)sc, spd, 0, 4, hand);
 139         if (xfer == NULL) {
 140                 return NULL;
 141         }
 142
 143         fp = &xfer->send.hdr;
 144         fp->mode.rreqq.tcode = FWTCODE_RREQQ;
 145         fp->mode.rreqq.dest_hi = dst_hi;
 146         fp->mode.rreqq.dest_lo = dst_lo;
 147
 148         xfer->send.payload = NULL;
 149         xfer->recv.payload = (u_int32_t *)data;
 150
 151         if (fwmem_debug)
 152                 kprintf("fwmem_read_quad: %d %04x:%08x\n", fwdev->dst,
 153                                 dst_hi, dst_lo);
 154
 155         if (fw_asyreq(xfer->fc, -1, xfer) == 0)
 156                 return xfer;
 157
 158         fw_xfer_free(xfer);
 159         return NULL;
 160 }
 161
 162 struct fw_xfer *
 163 fwmem_write_quad(
 164         struct fw_device *fwdev,
 165         caddr_t sc,
 166         u_int8_t spd,
 167         u_int16_t dst_hi,
 168         u_int32_t dst_lo,
 169         void *data,
 170         void (*hand)(struct fw_xfer *))
 171 {
 172         struct fw_xfer *xfer;
 173         struct fw_pkt *fp;
 174
 175         xfer = fwmem_xfer_req(fwdev, sc, spd, 0, 0, hand);
 176         if (xfer == NULL)
 177                 return NULL;
 178
 179         fp = &xfer->send.hdr;
 180         fp->mode.wreqq.tcode = FWTCODE_WREQQ;
 181         fp->mode.wreqq.dest_hi = dst_hi;
 182         fp->mode.wreqq.dest_lo = dst_lo;
 183         fp->mode.wreqq.data = *(u_int32_t *)data;
 184
 185         xfer->send.payload = xfer->recv.payload = NULL;
 186
 187         if (fwmem_debug)
 188                 kprintf("fwmem_write_quad: %d %04x:%08x %08x\n", fwdev->dst,
 189                         dst_hi, dst_lo, *(u_int32_t *)data);
 190
 191         if (fw_asyreq(xfer->fc, -1, xfer) == 0)
 192                 return xfer;
 193
 194         fw_xfer_free(xfer);
 195         return NULL;
 196 }
 197
 198 struct fw_xfer *
 199 fwmem_read_block(
 200         struct fw_device *fwdev,
 201         caddr_t sc,
 202         u_int8_t spd,
 203         u_int16_t dst_hi,
 204         u_int32_t dst_lo,
 205         int len,
 206         void *data,
 207         void (*hand)(struct fw_xfer *))
 208 {
 209         struct fw_xfer *xfer;
 210         struct fw_pkt *fp;
 211
 212         xfer = fwmem_xfer_req(fwdev, sc, spd, 0, roundup2(len, 4), hand);
 213         if (xfer == NULL)
 214                 return NULL;
 215
 216         fp = &xfer->send.hdr;
 217         fp->mode.rreqb.tcode = FWTCODE_RREQB;
 218         fp->mode.rreqb.dest_hi = dst_hi;
 219         fp->mode.rreqb.dest_lo = dst_lo;
 220         fp->mode.rreqb.len = len;
 221         fp->mode.rreqb.extcode = 0;
 222
 223         xfer->send.payload = NULL;
 224         xfer->recv.payload = data;
 225
 226         if (fwmem_debug)
 227                 kprintf("fwmem_read_block: %d %04x:%08x %d\n", fwdev->dst,
 228                                 dst_hi, dst_lo, len);
 229         if (fw_asyreq(xfer->fc, -1, xfer) == 0)
 230                 return xfer;
 231
 232         fw_xfer_free(xfer);
 233         return NULL;
 234 }
 235
 236 struct fw_xfer *
 237 fwmem_write_block(
 238         struct fw_device *fwdev,
 239         caddr_t sc,
 240         u_int8_t spd,
 241         u_int16_t dst_hi,
 242         u_int32_t dst_lo,
 243         int len,
 244         void *data,
 245         void (*hand)(struct fw_xfer *))
 246 {
 247         struct fw_xfer *xfer;
 248         struct fw_pkt *fp;
 249
 250         xfer = fwmem_xfer_req(fwdev, sc, spd, len, 0, hand);
 251         if (xfer == NULL)
 252                 return NULL;
 253
 254         fp = &xfer->send.hdr;
 255         fp->mode.wreqb.tcode = FWTCODE_WREQB;
 256         fp->mode.wreqb.dest_hi = dst_hi;
 257         fp->mode.wreqb.dest_lo = dst_lo;
 258         fp->mode.wreqb.len = len;
 259         fp->mode.wreqb.extcode = 0;
 260
 261         xfer->send.payload = data;
 262         xfer->recv.payload = NULL;
 263
 264         if (fwmem_debug)
 265                 kprintf("fwmem_write_block: %d %04x:%08x %d\n", fwdev->dst,
 266                                 dst_hi, dst_lo, len);
 267         if (fw_asyreq(xfer->fc, -1, xfer) == 0)
 268                 return xfer;
 269
 270         fw_xfer_free(xfer);
 271         return NULL;
 272 }
 273
 274
 275 int
 276 fwmem_open (struct dev_open_args *ap)
 277 {
 278         cdev_t dev = ap->a_head.a_dev;
 279         struct fwmem_softc *fms;
 280
 281         if (dev->si_drv1 != NULL) {
 282                 if ((ap->a_oflags & FWRITE) != 0)
 283                         return (EBUSY);
 284                 fms = (struct fwmem_softc *)dev->si_drv1;
 285                 fms->refcount ++;
 286         } else {
 287                 fms = (struct fwmem_softc *)kmalloc(sizeof(struct fwmem_softc),
 288                                                         M_FWMEM, M_WAITOK);
 289                 bcopy(&fwmem_eui64, &fms->eui, sizeof(struct fw_eui64));
 290                 dev->si_drv1 = (void *)fms;
 291                 dev->si_iosize_max = DFLTPHYS;
 292                 fms->refcount = 1;
 293         }
 294         if (fwmem_debug)
 295                 kprintf("%s: refcount=%d\n", __func__, fms->refcount);
 296
 297         return (0);
 298 }
 299
 300 int
 301 fwmem_close (struct dev_close_args *ap)
 302 {
 303         cdev_t dev = ap->a_head.a_dev;
 304         struct fwmem_softc *fms;
 305
 306         fms = (struct fwmem_softc *)dev->si_drv1;
 307         fms->refcount --;
 308         if (fwmem_debug)
 309                 kprintf("%s: refcount=%d\n", __func__, fms->refcount);
 310         if (fms->refcount < 1) {
 311                 kfree(dev->si_drv1, M_FW);
 312                 dev->si_drv1 = NULL;
 313         }
 314
 315         return (0);
 316 }
 317
 318
 319 static void
 320 fwmem_biodone(struct fw_xfer *xfer)
 321 {
 322         struct bio *bio;
 323         struct buf *bp;
 324
 325         bio = (struct bio *)xfer->sc;
 326         bp = bio->bio_buf;
 327         bp->b_error = xfer->resp;
 328
 329         if (bp->b_error != 0) {
 330                 if (fwmem_debug)
 331                         kprintf("%s: err=%d\n", __func__, bp->b_error);
 332                 bp->b_flags |= B_ERROR;
 333                 bp->b_resid = bp->b_bcount;
 334         }
 335         fw_xfer_free(xfer);
 336         biodone(bio);
 337 }
 338
 339 int
 340 fwmem_strategy(struct dev_strategy_args *ap)
 341 {
 342         cdev_t dev = ap->a_head.a_dev;
 343         struct bio *bio = ap->a_bio;
 344         struct buf *bp = bio->bio_buf;
 345         struct firewire_softc *sc;
 346         struct fwmem_softc *fms;
 347         struct fw_device *fwdev;
 348         struct fw_xfer *xfer;
 349         int unit, err=0, iolen;
 350
 351         /* XXX check request length */
 352
 353         unit = DEV2UNIT(dev);
 354         sc = devclass_get_softc(firewire_devclass, unit);
 355
 356         crit_enter();
 357         fms = (struct fwmem_softc *)dev->si_drv1;
 358         fwdev = fw_noderesolve_eui64(sc->fc, &fms->eui);
 359         if (fwdev == NULL) {
 360                 if (fwmem_debug)
 361                         kprintf("fwmem: no such device ID:%08x%08x\n",
 362                                         fms->eui.hi, fms->eui.lo);
 363                 err = EINVAL;
 364                 goto error;
 365         }
 366         if (bio->bio_offset == NOOFFSET) {
 367                 kprintf("fwmem: offset was not set bp %p\n", bp);
 368                 err = EINVAL;
 369                 goto error;
 370         }
 371
 372         iolen = MIN(bp->b_bcount, MAXLEN);
 373         if (bp->b_cmd == BUF_CMD_READ) {
 374                 if (iolen == 4 && (bio->bio_offset & 3) == 0)
 375                         xfer = fwmem_read_quad(fwdev,
 376                             (void *) bio, fwmem_speed,
 377                             bio->bio_offset >> 32, bio->bio_offset & 0xffffffff,
 378                             bp->b_data, fwmem_biodone);
 379                 else
 380                         xfer = fwmem_read_block(fwdev,
 381                             (void *) bio, fwmem_speed,
 382                             bio->bio_offset >> 32, bio->bio_offset & 0xffffffff,
 383                             iolen, bp->b_data, fwmem_biodone);
 384         } else {
 385                 if (iolen == 4 && (bio->bio_offset & 3) == 0)
 386                         xfer = fwmem_write_quad(fwdev,
 387                             (void *)bio, fwmem_speed,
 388                             bio->bio_offset >> 32, bio->bio_offset & 0xffffffff,
 389                             bp->b_data, fwmem_biodone);
 390                 else
 391                         xfer = fwmem_write_block(fwdev,
 392                             (void *)bio, fwmem_speed,
 393                             bio->bio_offset >> 32, bio->bio_offset & 0xffffffff,
 394                             iolen, bp->b_data, fwmem_biodone);
 395         }
 396         if (xfer == NULL) {
 397                 err = EIO;
 398                 goto error;
 399         }
 400         /* XXX */
 401         bp->b_resid = bp->b_bcount - iolen;
 402 error:
 403         crit_exit();
 404         if (err != 0) {
 405                 if (fwmem_debug)
 406                         kprintf("%s: err=%d\n", __func__, err);
 407                 bp->b_error = err;
 408                 bp->b_flags |= B_ERROR;
 409                 bp->b_resid = bp->b_bcount;
 410                 biodone(bio);
 411         }
 412         return(0);
 413 }
 414
 415 int
 416 fwmem_ioctl(struct dev_ioctl_args *ap)
 417 {
 418         cdev_t dev = ap->a_head.a_dev;
 419         struct fwmem_softc *fms;
 420         int err = 0;
 421
 422         fms = (struct fwmem_softc *)dev->si_drv1;
 423         switch (ap->a_cmd) {
 424         case FW_SDEUI64:
 425                 bcopy(ap->a_data, &fms->eui, sizeof(struct fw_eui64));
 426                 break;
 427         case FW_GDEUI64:
 428                 bcopy(&fms->eui, ap->a_data, sizeof(struct fw_eui64));
 429                 break;
 430         default:
 431                 err = EINVAL;
 432         }
 433         return(err);
 434 }
 435 int
 436 fwmem_poll(struct dev_poll_args *ap)
 437 {
 438         return EINVAL;
 439 }
 440 int
 441 fwmem_mmap(struct dev_mmap_args *ap)
 442 {
 443         return EINVAL;
 444 }