fwmem.c revision 110577
1/* 2 * Copyright (C) 2002 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 * $FreeBSD: head/sys/dev/firewire/fwmem.c 110577 2003-02-09 07:16:01Z simokawa $ 35 */ 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/types.h> 40 41#include <sys/kernel.h> 42#include <sys/malloc.h> 43#include <sys/conf.h> 44#include <sys/uio.h> 45#include <sys/sysctl.h> 46 47#include <sys/bus.h> 48 49#include <sys/signal.h> 50#include <sys/mman.h> 51#include <sys/ioccom.h> 52 53#include <dev/firewire/firewire.h> 54#include <dev/firewire/firewirereg.h> 55#include <dev/firewire/fwmem.h> 56 57static int fwmem_speed=2, fwmem_debug=0; 58static struct fw_eui64 fwmem_eui64; 59SYSCTL_DECL(_hw_firewire); 60SYSCTL_NODE(_hw_firewire, OID_AUTO, fwmem, CTLFLAG_RD, 0, 61 "FireWire Memory Access"); 62SYSCTL_UINT(_hw_firewire_fwmem, OID_AUTO, eui64_hi, CTLFLAG_RW, 63 &fwmem_eui64.hi, 0, "Fwmem target EUI64 high"); 64SYSCTL_UINT(_hw_firewire_fwmem, OID_AUTO, eui64_low, CTLFLAG_RW, 65 &fwmem_eui64.lo, 0, "Fwmem target EUI64 low"); 66SYSCTL_INT(_hw_firewire_fwmem, OID_AUTO, speed, CTLFLAG_RW, &fwmem_speed, 0, 67 "Fwmem link speed"); 68SYSCTL_INT(_debug, OID_AUTO, fwmem_debug, CTLFLAG_RW, &fwmem_debug, 0, 69 "Fwmem driver debug flag"); 70 71static struct fw_xfer *fwmem_xfer_req(struct fw_device *, caddr_t, 72 int, int, void *); 73 74static struct fw_xfer * 75fwmem_xfer_req( 76 struct fw_device *fwdev, 77 caddr_t sc, 78 int spd, 79 int len, 80 void *hand) 81{ 82 struct fw_xfer *xfer; 83 84 xfer = fw_xfer_alloc(M_FWXFER); 85 if (xfer == NULL) 86 return NULL; 87 88 xfer->fc = fwdev->fc; 89 xfer->dst = FWLOCALBUS | fwdev->dst; 90 if (spd < 0) 91 xfer->spd = fwdev->speed; 92 else 93 xfer->spd = min(spd, fwdev->speed); 94 xfer->send.len = len; 95 xfer->send.buf = malloc(len, M_FW, M_NOWAIT | M_ZERO); 96 97 if (xfer->send.buf == NULL) { 98 fw_xfer_free(xfer); 99 return NULL; 100 } 101 102 xfer->send.off = 0; 103 xfer->act.hand = hand; 104 xfer->retry_req = fw_asybusy; 105 xfer->sc = sc; 106 107 return xfer; 108} 109 110struct fw_xfer * 111fwmem_read_quad( 112 struct fw_device *fwdev, 113 caddr_t sc, 114 u_int8_t spd, 115 u_int16_t dst_hi, 116 u_int32_t dst_lo, 117 void (*hand)(struct fw_xfer *)) 118{ 119 struct fw_xfer *xfer; 120 struct fw_pkt *fp; 121 122 xfer = fwmem_xfer_req(fwdev, sc, spd, 12, hand); 123 if (xfer == NULL) 124 return NULL; 125 126 fp = (struct fw_pkt *)xfer->send.buf; 127 fp->mode.rreqq.tcode = FWTCODE_RREQQ; 128 fp->mode.rreqq.dst = htons(xfer->dst); 129 fp->mode.rreqq.dest_hi = htons(dst_hi); 130 fp->mode.rreqq.dest_lo = htonl(dst_lo); 131 132 if (fwmem_debug) 133 printf("fwmem_read_quad: %d %04x:%08x\n", fwdev->dst, 134 dst_hi, dst_lo); 135 136 if (fw_asyreq(xfer->fc, -1, xfer) == 0) 137 return xfer; 138 139 fw_xfer_free(xfer); 140 return NULL; 141} 142 143struct fw_xfer * 144fwmem_write_quad( 145 struct fw_device *fwdev, 146 caddr_t sc, 147 u_int8_t spd, 148 u_int16_t dst_hi, 149 u_int32_t dst_lo, 150 u_int32_t data, 151 void (*hand)(struct fw_xfer *)) 152{ 153 struct fw_xfer *xfer; 154 struct fw_pkt *fp; 155 156 xfer = fwmem_xfer_req(fwdev, sc, spd, 16, hand); 157 if (xfer == NULL) 158 return NULL; 159 160 fp = (struct fw_pkt *)xfer->send.buf; 161 fp->mode.wreqq.tcode = FWTCODE_WREQQ; 162 fp->mode.wreqq.dst = htons(xfer->dst); 163 fp->mode.wreqq.dest_hi = htons(dst_hi); 164 fp->mode.wreqq.dest_lo = htonl(dst_lo); 165 166 fp->mode.wreqq.data = htonl(data); 167 168 if (fwmem_debug) 169 printf("fwmem_write_quad: %d %04x:%08x %08x\n", fwdev->dst, 170 dst_hi, dst_lo, data); 171 172 if (fw_asyreq(xfer->fc, -1, xfer) == 0) 173 return xfer; 174 175 fw_xfer_free(xfer); 176 return NULL; 177} 178 179struct fw_xfer * 180fwmem_read_block( 181 struct fw_device *fwdev, 182 caddr_t sc, 183 u_int8_t spd, 184 u_int16_t dst_hi, 185 u_int32_t dst_lo, 186 int len, 187 void (*hand)(struct fw_xfer *)) 188{ 189 struct fw_xfer *xfer; 190 struct fw_pkt *fp; 191 192 xfer = fwmem_xfer_req(fwdev, sc, spd, 16, hand); 193 if (xfer == NULL) 194 return NULL; 195 196 fp = (struct fw_pkt *)xfer->send.buf; 197 fp->mode.rreqb.tcode = FWTCODE_RREQB; 198 fp->mode.rreqb.dst = htons(xfer->dst); 199 fp->mode.rreqb.dest_hi = htons(dst_hi); 200 fp->mode.rreqb.dest_lo = htonl(dst_lo); 201 fp->mode.rreqb.len = htons(len); 202 203 if (fwmem_debug) 204 printf("fwmem_read_block: %d %04x:%08x %d\n", fwdev->dst, 205 dst_hi, dst_lo, len); 206 if (fw_asyreq(xfer->fc, -1, xfer) == 0) 207 return xfer; 208 209 fw_xfer_free(xfer); 210 return NULL; 211} 212 213struct fw_xfer * 214fwmem_write_block( 215 struct fw_device *fwdev, 216 caddr_t sc, 217 u_int8_t spd, 218 u_int16_t dst_hi, 219 u_int32_t dst_lo, 220 int len, 221 char *data, 222 void (*hand)(struct fw_xfer *)) 223{ 224 struct fw_xfer *xfer; 225 struct fw_pkt *fp; 226 227 xfer = fwmem_xfer_req(fwdev, sc, spd, 16 + roundup(len, 4), hand); 228 if (xfer == NULL) 229 return NULL; 230 231 fp = (struct fw_pkt *)xfer->send.buf; 232 fp->mode.wreqb.tcode = FWTCODE_WREQB; 233 fp->mode.wreqb.dst = htons(xfer->dst); 234 fp->mode.wreqb.dest_hi = htons(dst_hi); 235 fp->mode.wreqb.dest_lo = htonl(dst_lo); 236 fp->mode.wreqb.len = htons(len); 237 bcopy(data, &fp->mode.wreqb.payload[0], len); 238 239 if (fwmem_debug) 240 printf("fwmem_write_block: %d %04x:%08x %d\n", fwdev->dst, 241 dst_hi, dst_lo, len); 242 if (fw_asyreq(xfer->fc, -1, xfer) == 0) 243 return xfer; 244 245 fw_xfer_free(xfer); 246 return NULL; 247} 248 249 250int 251fwmem_open (dev_t dev, int flags, int fmt, fw_proc *td) 252{ 253 int err = 0; 254 return err; 255} 256 257int 258fwmem_close (dev_t dev, int flags, int fmt, fw_proc *td) 259{ 260 int err = 0; 261 return err; 262} 263 264#define MAXLEN 2048 265#define USE_QUAD 0 266int 267fwmem_read (dev_t dev, struct uio *uio, int ioflag) 268{ 269 struct firewire_softc *sc; 270 struct fw_device *fwdev; 271 struct fw_xfer *xfer; 272 int err = 0; 273 int unit = DEV2UNIT(dev); 274 u_int16_t dst_hi; 275 u_int32_t dst_lo; 276 off_t offset; 277 int len; 278 279 sc = devclass_get_softc(firewire_devclass, unit); 280 fwdev = fw_noderesolve_eui64(sc->fc, fwmem_eui64); 281 if (fwdev == NULL) { 282 if (fwmem_debug) 283 printf("fwmem: no such device ID:%08x%08x\n", 284 fwmem_eui64.hi, fwmem_eui64.lo); 285 return EINVAL; 286 } 287 288 while(uio->uio_resid > 0 && !err) { 289 offset = uio->uio_offset; 290 dst_hi = (offset >> 32) & 0xffff; 291 dst_lo = offset & 0xffffffff; 292 len = uio->uio_resid; 293 if (len == 4 && (dst_lo & 3) == 0) { 294 xfer = fwmem_read_quad(fwdev, NULL, fwmem_speed, 295 dst_hi, dst_lo, fw_asy_callback); 296 if (xfer == NULL) { 297 err = EINVAL; 298 break; 299 } 300 err = tsleep((caddr_t)xfer, FWPRI, "fwmrq", hz); 301 if (err !=0 || xfer->resp != 0 302 || xfer->recv.buf == NULL) 303 err = EIO; 304 else 305 err = uiomove(xfer->recv.buf 306 + xfer->recv.off + 4*3, 4, uio); 307 } else { 308 if (len > MAXLEN) 309 len = MAXLEN; 310 xfer = fwmem_read_block(fwdev, NULL, fwmem_speed, 311 dst_hi, dst_lo, len, fw_asy_callback); 312 if (xfer == NULL) { 313 err = EINVAL; 314 break; 315 } 316 err = tsleep((caddr_t)xfer, FWPRI, "fwmrb", hz); 317 if (err != 0 || xfer->resp != 0 318 || xfer->recv.buf == NULL) 319 err = EIO; 320 else 321 err = uiomove(xfer->recv.buf 322 + xfer->recv.off + 4*4, len, uio); 323 } 324 fw_xfer_free(xfer); 325 } 326 return err; 327} 328int 329fwmem_write (dev_t dev, struct uio *uio, int ioflag) 330{ 331 struct firewire_softc *sc; 332 struct fw_device *fwdev; 333 struct fw_xfer *xfer; 334 int err = 0; 335 int unit = DEV2UNIT(dev); 336 u_int16_t dst_hi; 337 u_int32_t dst_lo, quad; 338 char *data; 339 off_t offset; 340 int len; 341 342 sc = devclass_get_softc(firewire_devclass, unit); 343 fwdev = fw_noderesolve_eui64(sc->fc, fwmem_eui64); 344 if (fwdev == NULL) { 345 if (fwmem_debug) 346 printf("fwmem: no such device ID:%08x%08x\n", 347 fwmem_eui64.hi, fwmem_eui64.lo); 348 return EINVAL; 349 } 350 351 data = malloc(MAXLEN, M_FW, 0); 352 if (data == NULL) 353 return ENOMEM; 354 355 while(uio->uio_resid > 0 && !err) { 356 offset = uio->uio_offset; 357 dst_hi = (offset >> 32) & 0xffff; 358 dst_lo = offset & 0xffffffff; 359 len = uio->uio_resid; 360 if (len == 4 && (dst_lo & 3) == 0) { 361 err = uiomove((char *)&quad, sizeof(quad), uio); 362 xfer = fwmem_write_quad(fwdev, NULL, fwmem_speed, 363 dst_hi, dst_lo, quad, fw_asy_callback); 364 if (xfer == NULL) { 365 err = EINVAL; 366 break; 367 } 368 err = tsleep((caddr_t)xfer, FWPRI, "fwmwq", hz); 369 if (err !=0 || xfer->resp != 0) 370 err = EIO; 371 } else { 372 if (len > MAXLEN) 373 len = MAXLEN; 374 err = uiomove(data, len, uio); 375 if (err) 376 break; 377 xfer = fwmem_write_block(fwdev, NULL, fwmem_speed, 378 dst_hi, dst_lo, len, data, fw_asy_callback); 379 if (xfer == NULL) { 380 err = EINVAL; 381 break; 382 } 383 err = tsleep((caddr_t)xfer, FWPRI, "fwmwb", hz); 384 if (err != 0 || xfer->resp != 0) 385 err = EIO; 386 } 387 fw_xfer_free(xfer); 388 } 389 free(data, M_FW); 390 return err; 391} 392 393int 394fwmem_ioctl (dev_t dev, u_long cmd, caddr_t data, int flag, fw_proc *td) 395{ 396 return EINVAL; 397} 398int 399fwmem_poll (dev_t dev, int events, fw_proc *td) 400{ 401 return EINVAL; 402} 403int 404fwmem_mmap (dev_t dev, vm_offset_t offset, int nproto) 405{ 406 return EINVAL; 407} 408