fwmem.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-4-Clause
    3  *
    4  * Copyright (c) 2002-2003
    5  *      Hidetoshi Shimokawa. All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *
   18  *      This product includes software developed by Hidetoshi Shimokawa.
   19  *
   20  * 4. Neither the name of the author nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  */
   37 
   38 #ifdef __FreeBSD__
   39 #include <sys/cdefs.h>
   40 __FBSDID("$FreeBSD$");
   41 #endif
   42 
   43 #include <sys/param.h>
   44 #include <sys/systm.h>
   45 #include <sys/types.h>
   46 
   47 #include <sys/kernel.h>
   48 #include <sys/malloc.h>
   49 #include <sys/conf.h>
   50 #include <sys/sysctl.h>
   51 #include <sys/bio.h>
   52 
   53 #include <sys/bus.h>
   54 #include <machine/bus.h>
   55 
   56 #include <sys/signal.h>
   57 #include <sys/mman.h>
   58 #include <sys/ioccom.h>
   59 #include <sys/fcntl.h>
   60 
   61 #include <dev/firewire/firewire.h>
   62 #include <dev/firewire/firewirereg.h>
   63 #include <dev/firewire/fwmem.h>
   64 
   65 static int fwmem_speed = 2, fwmem_debug = 0;
   66 static struct fw_eui64 fwmem_eui64;
   67 SYSCTL_DECL(_hw_firewire);
   68 static SYSCTL_NODE(_hw_firewire, OID_AUTO, fwmem,
   69     CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
   70     "FireWire Memory Access");
   71 SYSCTL_UINT(_hw_firewire_fwmem, OID_AUTO, eui64_hi, CTLFLAG_RW,
   72         &fwmem_eui64.hi, 0, "Fwmem target EUI64 high");
   73 SYSCTL_UINT(_hw_firewire_fwmem, OID_AUTO, eui64_lo, CTLFLAG_RW,
   74         &fwmem_eui64.lo, 0, "Fwmem target EUI64 low");
   75 SYSCTL_INT(_hw_firewire_fwmem, OID_AUTO, speed, CTLFLAG_RW, &fwmem_speed, 0,
   76         "Fwmem link speed");
   77 SYSCTL_INT(_debug, OID_AUTO, fwmem_debug, CTLFLAG_RW, &fwmem_debug, 0,
   78         "Fwmem driver debug flag");
   79 
   80 static MALLOC_DEFINE(M_FWMEM, "fwmem", "fwmem/FireWire");
   81 
   82 #define MAXLEN (512 << fwmem_speed)
   83 
   84 struct fwmem_softc {
   85         struct fw_eui64 eui;
   86         struct firewire_softc *sc;
   87         int refcount;
   88 };
   89 
   90 static struct fw_xfer *
   91 fwmem_xfer_req(
   92         struct fw_device *fwdev,
   93         caddr_t sc,
   94         int spd,
   95         int slen,
   96         int rlen,
   97         void *hand)
   98 {
   99         struct fw_xfer *xfer;
  100 
  101         xfer = fw_xfer_alloc(M_FWMEM);
  102         if (xfer == NULL)
  103                 return NULL;
  104 
  105         xfer->fc = fwdev->fc;
  106         xfer->send.hdr.mode.hdr.dst = FWLOCALBUS | fwdev->dst;
  107         if (spd < 0)
  108                 xfer->send.spd = fwdev->speed;
  109         else
  110                 xfer->send.spd = min(spd, fwdev->speed);
  111         xfer->hand = hand;
  112         xfer->sc = sc;
  113         xfer->send.pay_len = slen;
  114         xfer->recv.pay_len = rlen;
  115 
  116         return xfer;
  117 }
  118 
  119 struct fw_xfer *
  120 fwmem_read_quad(
  121         struct fw_device *fwdev,
  122         caddr_t sc,
  123         uint8_t spd,
  124         uint16_t dst_hi,
  125         uint32_t dst_lo,
  126         void *data,
  127         void (*hand)(struct fw_xfer *))
  128 {
  129         struct fw_xfer *xfer;
  130         struct fw_pkt *fp;
  131 
  132         xfer = fwmem_xfer_req(fwdev, sc, spd, 0, 4, hand);
  133         if (xfer == NULL) {
  134                 return NULL;
  135         }
  136 
  137         fp = &xfer->send.hdr;
  138         fp->mode.rreqq.tcode = FWTCODE_RREQQ;
  139         fp->mode.rreqq.dest_hi = dst_hi;
  140         fp->mode.rreqq.dest_lo = dst_lo;
  141 
  142         xfer->send.payload = NULL;
  143         xfer->recv.payload = (uint32_t *)data;
  144 
  145         if (fwmem_debug)
  146                 printf("fwmem_read_quad: %d %04x:%08x\n", fwdev->dst,
  147                     dst_hi, dst_lo);
  148 
  149         if (fw_asyreq(xfer->fc, -1, xfer) == 0)
  150                 return xfer;
  151 
  152         fw_xfer_free(xfer);
  153         return NULL;
  154 }
  155 
  156 struct fw_xfer *
  157 fwmem_write_quad(
  158         struct fw_device *fwdev,
  159         caddr_t sc,
  160         uint8_t spd,
  161         uint16_t dst_hi,
  162         uint32_t dst_lo,
  163         void *data,
  164         void (*hand)(struct fw_xfer *))
  165 {
  166         struct fw_xfer *xfer;
  167         struct fw_pkt *fp;
  168 
  169         xfer = fwmem_xfer_req(fwdev, sc, spd, 0, 0, hand);
  170         if (xfer == NULL)
  171                 return NULL;
  172 
  173         fp = &xfer->send.hdr;
  174         fp->mode.wreqq.tcode = FWTCODE_WREQQ;
  175         fp->mode.wreqq.dest_hi = dst_hi;
  176         fp->mode.wreqq.dest_lo = dst_lo;
  177         fp->mode.wreqq.data = *(uint32_t *)data;
  178 
  179         xfer->send.payload = xfer->recv.payload = NULL;
  180 
  181         if (fwmem_debug)
  182                 printf("fwmem_write_quad: %d %04x:%08x %08x\n", fwdev->dst,
  183                     dst_hi, dst_lo, *(uint32_t *)data);
  184 
  185         if (fw_asyreq(xfer->fc, -1, xfer) == 0)
  186                 return xfer;
  187 
  188         fw_xfer_free(xfer);
  189         return NULL;
  190 }
  191 
  192 struct fw_xfer *
  193 fwmem_read_block(
  194         struct fw_device *fwdev,
  195         caddr_t sc,
  196         uint8_t spd,
  197         uint16_t dst_hi,
  198         uint32_t dst_lo,
  199         int len,
  200         void *data,
  201         void (*hand)(struct fw_xfer *))
  202 {
  203         struct fw_xfer *xfer;
  204         struct fw_pkt *fp;
  205 
  206         xfer = fwmem_xfer_req(fwdev, sc, spd, 0, roundup2(len, 4), hand);
  207         if (xfer == NULL)
  208                 return NULL;
  209 
  210         fp = &xfer->send.hdr;
  211         fp->mode.rreqb.tcode = FWTCODE_RREQB;
  212         fp->mode.rreqb.dest_hi = dst_hi;
  213         fp->mode.rreqb.dest_lo = dst_lo;
  214         fp->mode.rreqb.len = len;
  215         fp->mode.rreqb.extcode = 0;
  216 
  217         xfer->send.payload = NULL;
  218         xfer->recv.payload = data;
  219 
  220         if (fwmem_debug)
  221                 printf("fwmem_read_block: %d %04x:%08x %d\n", fwdev->dst,
  222                     dst_hi, dst_lo, len);
  223         if (fw_asyreq(xfer->fc, -1, xfer) == 0)
  224                 return xfer;
  225 
  226         fw_xfer_free(xfer);
  227         return NULL;
  228 }
  229 
  230 struct fw_xfer *
  231 fwmem_write_block(
  232         struct fw_device *fwdev,
  233         caddr_t sc,
  234         uint8_t spd,
  235         uint16_t dst_hi,
  236         uint32_t dst_lo,
  237         int len,
  238         void *data,
  239         void (*hand)(struct fw_xfer *))
  240 {
  241         struct fw_xfer *xfer;
  242         struct fw_pkt *fp;
  243 
  244         xfer = fwmem_xfer_req(fwdev, sc, spd, len, 0, hand);
  245         if (xfer == NULL)
  246                 return NULL;
  247 
  248         fp = &xfer->send.hdr;
  249         fp->mode.wreqb.tcode = FWTCODE_WREQB;
  250         fp->mode.wreqb.dest_hi = dst_hi;
  251         fp->mode.wreqb.dest_lo = dst_lo;
  252         fp->mode.wreqb.len = len;
  253         fp->mode.wreqb.extcode = 0;
  254 
  255         xfer->send.payload = data;
  256         xfer->recv.payload = NULL;
  257 
  258         if (fwmem_debug)
  259                 printf("fwmem_write_block: %d %04x:%08x %d\n", fwdev->dst,
  260                                 dst_hi, dst_lo, len);
  261         if (fw_asyreq(xfer->fc, -1, xfer) == 0)
  262                 return xfer;
  263 
  264         fw_xfer_free(xfer);
  265         return NULL;
  266 }
  267 
  268 int
  269 fwmem_open(struct cdev *dev, int flags, int fmt, fw_proc *td)
  270 {
  271         struct fwmem_softc *fms;
  272         struct firewire_softc *sc;
  273         int unit = DEV2UNIT(dev);
  274 
  275         sc = devclass_get_softc(firewire_devclass, unit);
  276         if (sc == NULL)
  277                 return (ENXIO);
  278 
  279         FW_GLOCK(sc->fc);
  280         if (dev->si_drv1 != NULL) {
  281                 if ((flags & FWRITE) != 0) {
  282                         FW_GUNLOCK(sc->fc);
  283                         return (EBUSY);
  284                 }
  285                 FW_GUNLOCK(sc->fc);
  286                 fms = dev->si_drv1;
  287                 fms->refcount++;
  288         } else {
  289                 dev->si_drv1 = (void *)-1;
  290                 FW_GUNLOCK(sc->fc);
  291                 dev->si_drv1 = malloc(sizeof(struct fwmem_softc),
  292                     M_FWMEM, M_WAITOK);
  293                 dev->si_iosize_max = DFLTPHYS;
  294                 fms = dev->si_drv1;
  295                 bcopy(&fwmem_eui64, &fms->eui, sizeof(struct fw_eui64));
  296                 fms->sc = sc;
  297                 fms->refcount = 1;
  298         }
  299         if (fwmem_debug)
  300                 printf("%s: refcount=%d\n", __func__, fms->refcount);
  301 
  302         return (0);
  303 }
  304 
  305 int
  306 fwmem_close (struct cdev *dev, int flags, int fmt, fw_proc *td)
  307 {
  308         struct fwmem_softc *fms;
  309 
  310         fms = dev->si_drv1;
  311 
  312         FW_GLOCK(fms->sc->fc);
  313         fms->refcount--;
  314         FW_GUNLOCK(fms->sc->fc);
  315         if (fwmem_debug)
  316                 printf("%s: refcount=%d\n", __func__, fms->refcount);
  317         if (fms->refcount < 1) {
  318                 free(dev->si_drv1, M_FWMEM);
  319                 dev->si_drv1 = NULL;
  320         }
  321 
  322         return (0);
  323 }
  324 
  325 
  326 static void
  327 fwmem_biodone(struct fw_xfer *xfer)
  328 {
  329         struct bio *bp;
  330 
  331         bp = (struct bio *)xfer->sc;
  332         bp->bio_error = xfer->resp;
  333 
  334         if (bp->bio_error != 0) {
  335                 if (fwmem_debug)
  336                         printf("%s: err=%d\n", __func__, bp->bio_error);
  337                 bp->bio_flags |= BIO_ERROR;
  338                 bp->bio_resid = bp->bio_bcount;
  339         }
  340 
  341         fw_xfer_free(xfer);
  342         biodone(bp);
  343 }
  344 
  345 void
  346 fwmem_strategy(struct bio *bp)
  347 {
  348         struct fwmem_softc *fms;
  349         struct fw_device *fwdev;
  350         struct fw_xfer *xfer;
  351         struct cdev *dev;
  352         int err = 0, iolen;
  353 
  354         dev = bp->bio_dev;
  355         /* XXX check request length */
  356 
  357         fms = dev->si_drv1;
  358         fwdev = fw_noderesolve_eui64(fms->sc->fc, &fms->eui);
  359         if (fwdev == NULL) {
  360                 if (fwmem_debug)
  361                         printf("fwmem: no such device ID:%08x%08x\n",
  362                             fms->eui.hi, fms->eui.lo);
  363                 err = EINVAL;
  364                 goto error;
  365         }
  366 
  367         iolen = MIN(bp->bio_bcount, MAXLEN);
  368         if (bp->bio_cmd == BIO_READ) {
  369                 if (iolen == 4 && (bp->bio_offset & 3) == 0)
  370                         xfer = fwmem_read_quad(fwdev,
  371                             (void *)bp, fwmem_speed,
  372                             bp->bio_offset >> 32, bp->bio_offset & 0xffffffff,
  373                             bp->bio_data, fwmem_biodone);
  374                 else
  375                         xfer = fwmem_read_block(fwdev,
  376                             (void *)bp, fwmem_speed,
  377                             bp->bio_offset >> 32, bp->bio_offset & 0xffffffff,
  378                             iolen, bp->bio_data, fwmem_biodone);
  379         } else {
  380                 if (iolen == 4 && (bp->bio_offset & 3) == 0)
  381                         xfer = fwmem_write_quad(fwdev,
  382                             (void *)bp, fwmem_speed,
  383                             bp->bio_offset >> 32, bp->bio_offset & 0xffffffff,
  384                             bp->bio_data, fwmem_biodone);
  385                 else
  386                         xfer = fwmem_write_block(fwdev,
  387                             (void *)bp, fwmem_speed,
  388                             bp->bio_offset >> 32, bp->bio_offset & 0xffffffff,
  389                             iolen, bp->bio_data, fwmem_biodone);
  390         }
  391         if (xfer == NULL) {
  392                 err = EIO;
  393                 goto error;
  394         }
  395         /* XXX */
  396         bp->bio_resid = bp->bio_bcount - iolen;
  397 error:
  398         if (err != 0) {
  399                 if (fwmem_debug)
  400                         printf("%s: err=%d\n", __func__, err);
  401                 bp->bio_error = err;
  402                 bp->bio_flags |= BIO_ERROR;
  403                 bp->bio_resid = bp->bio_bcount;
  404                 biodone(bp);
  405         }
  406 }
  407 
  408 int
  409 fwmem_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, fw_proc *td)
  410 {
  411         struct fwmem_softc *fms;
  412         int err = 0;
  413 
  414         fms = dev->si_drv1;
  415         switch (cmd) {
  416         case FW_SDEUI64:
  417                 bcopy(data, &fms->eui, sizeof(struct fw_eui64));
  418                 break;
  419         case FW_GDEUI64:
  420                 bcopy(&fms->eui, data, sizeof(struct fw_eui64));
  421                 break;
  422         default:
  423                 err = EINVAL;
  424         }
  425         return (err);
  426 }
  427 
  428 int
  429 fwmem_poll(struct cdev *dev, int events, fw_proc *td)
  430 {
  431         return EINVAL;
  432 }
  433 
  434 int
  435 fwmem_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr,
  436     int nproto, vm_memattr_t *memattr)
  437 {
  438         return EINVAL;
  439 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/firewire/fwmem.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/firewire/fwmem.c
