fwmem.c revision 110337
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 110337 2003-02-04 17:09:59Z 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_RREQB; 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 printf("fwmem: no such device ID:%08x%08x\n", 283 fwmem_eui64.hi, fwmem_eui64.lo); 284 return EINVAL; 285 } 286 287 while(uio->uio_resid > 0) { 288 offset = uio->uio_offset; 289 dst_hi = (offset >> 32) & 0xffff; 290 dst_lo = offset & 0xffffffff; 291 len = uio->uio_resid; 292 if (len == 4 && (dst_lo & 3) == 0) { 293 xfer = fwmem_read_quad(fwdev, NULL, fwmem_speed, 294 dst_hi, dst_lo, fw_asy_callback); 295 if (xfer == NULL) 296 return EINVAL; 297 err = tsleep((caddr_t)xfer, FWPRI, "fwmrq", hz); 298 if (err !=0 || xfer->resp != 0 299 || xfer->recv.buf == NULL) 300 return EINVAL; /* XXX */ 301 err = uiomove(xfer->recv.buf + xfer->recv.off + 4*3, 302 4, uio); 303 } else { 304 if (len > MAXLEN) 305 len = MAXLEN; 306 xfer = fwmem_read_block(fwdev, NULL, fwmem_speed, 307 dst_hi, dst_lo, len, fw_asy_callback); 308 if (xfer == NULL) 309 return EINVAL; 310 err = tsleep((caddr_t)xfer, FWPRI, "fwmrb", hz); 311 if (err != 0 || xfer->resp != 0 312 || xfer->recv.buf == NULL) 313 return EINVAL; /* XXX */ 314 err = uiomove(xfer->recv.buf + xfer->recv.off + 4*4, 315 len, uio); 316 } 317 fw_xfer_free(xfer); 318 if (err) 319 return err; 320 } 321 return err; 322} 323int 324fwmem_write (dev_t dev, struct uio *uio, int ioflag) 325{ 326 struct firewire_softc *sc; 327 struct fw_device *fwdev; 328 struct fw_xfer *xfer; 329 int err = 0; 330 int unit = DEV2UNIT(dev); 331 u_int16_t dst_hi; 332 u_int32_t dst_lo, quad; 333 char *data; 334 off_t offset; 335 int len; 336 337 sc = devclass_get_softc(firewire_devclass, unit); 338 fwdev = fw_noderesolve_eui64(sc->fc, fwmem_eui64); 339 if (fwdev == NULL) { 340 printf("fwmem: no such device ID:%08x%08x\n", 341 fwmem_eui64.hi, fwmem_eui64.lo); 342 return EINVAL; 343 } 344 345 data = malloc(MAXLEN, M_FW, 0); 346 if (data == NULL) 347 return ENOMEM; 348 349 while(uio->uio_resid > 0) { 350 offset = uio->uio_offset; 351 dst_hi = (offset >> 32) & 0xffff; 352 dst_lo = offset & 0xffffffff; 353 len = uio->uio_resid; 354 if (len == 4 && (dst_lo & 3) == 0) { 355 err = uiomove((char *)&quad, sizeof(quad), uio); 356 xfer = fwmem_write_quad(fwdev, NULL, fwmem_speed, 357 dst_hi, dst_lo, quad, fw_asy_callback); 358 if (xfer == NULL) 359 return EINVAL; 360 err = tsleep((caddr_t)xfer, FWPRI, "fwmwq", hz); 361 if (err !=0 || xfer->resp != 0 362 || xfer->recv.buf == NULL) 363 return EINVAL; /* XXX */ 364 } else { 365 if (len > MAXLEN) 366 len = MAXLEN; 367 err = uiomove(data, len, uio); 368 if (err) 369 return err; 370 xfer = fwmem_write_block(fwdev, NULL, fwmem_speed, 371 dst_hi, dst_lo, len, data, fw_asy_callback); 372 if (xfer == NULL) 373 return EINVAL; 374 err = tsleep((caddr_t)xfer, FWPRI, "fwmwb", hz); 375 if (err != 0 || xfer->resp != 0 376 || xfer->recv.buf == NULL) 377 return EINVAL; /* XXX */ 378 fw_xfer_free(xfer); 379 } 380 } 381 return err; 382} 383 384int 385fwmem_ioctl (dev_t dev, u_long cmd, caddr_t data, int flag, fw_proc *td) 386{ 387 return EINVAL; 388} 389int 390fwmem_poll (dev_t dev, int events, fw_proc *td) 391{ 392 return EINVAL; 393} 394int 395fwmem_mmap (dev_t dev, vm_offset_t offset, int nproto) 396{ 397 return EINVAL; 398} 399