fwmem.c revision 106804
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 106804 2002-11-12 11:08:50Z 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_node=0, fwmem_speed=2, fwmem_debug=0; 58SYSCTL_DECL(_hw_firewire); 59SYSCTL_NODE(_hw_firewire, OID_AUTO, fwmem, CTLFLAG_RD, 0, 60 "Firewire Memory Access"); 61SYSCTL_INT(_hw_firewire_fwmem, OID_AUTO, node, CTLFLAG_RW, &fwmem_node, 0, 62 "Fwmem target node"); 63SYSCTL_INT(_hw_firewire_fwmem, OID_AUTO, speed, CTLFLAG_RW, &fwmem_speed, 0, 64 "Fwmem link speed"); 65SYSCTL_INT(_debug, OID_AUTO, fwmem_debug, CTLFLAG_RW, &fwmem_debug, 0, 66 "Fwmem driver debug flag"); 67 68struct fw_xfer * 69fwmem_read_quad( 70 struct firewire_comm *fc, 71 u_int8_t spd, 72 int dst, 73 u_int16_t dst_hi, 74 u_int32_t dst_lo, 75 void (*hand)(struct fw_xfer *)) 76{ 77 struct fw_xfer *xfer; 78 struct fw_pkt *fp; 79 80 xfer = fw_xfer_alloc(); 81 if (xfer == NULL) 82 return NULL; 83 84 xfer->fc = fc; 85 xfer->dst = FWLOCALBUS | dst; 86 xfer->spd = spd; 87 xfer->send.len = 12; 88 xfer->send.buf = malloc(xfer->send.len, M_DEVBUF, M_NOWAIT | M_ZERO); 89 90 if (xfer->send.buf == NULL) 91 goto error; 92 93 xfer->send.off = 0; 94 xfer->act.hand = hand; 95 xfer->retry_req = fw_asybusy; 96 xfer->sc = NULL; 97 98 fp = (struct fw_pkt *)xfer->send.buf; 99 fp->mode.rreqq.tcode = FWTCODE_RREQQ; 100 fp->mode.rreqq.dst = htons(xfer->dst); 101 fp->mode.rreqq.dest_hi = htons(dst_hi); 102 fp->mode.rreqq.dest_lo = htonl(dst_lo); 103 104 if (fwmem_debug) 105 printf("fwmem: %d %04x:%08x\n", dst, dst_hi, dst_lo); 106 107 if (fw_asyreq(fc, -1, xfer) == 0) 108 return xfer; 109 110error: 111 fw_xfer_free(xfer); 112 return NULL; 113} 114 115struct fw_xfer * 116fwmem_read_block( 117 struct firewire_comm *fc, 118 u_int8_t spd, 119 int dst, 120 u_int16_t dst_hi, 121 u_int32_t dst_lo, 122 int len, 123 void (*hand)(struct fw_xfer *)) 124{ 125 struct fw_xfer *xfer; 126 struct fw_pkt *fp; 127 128 xfer = fw_xfer_alloc(); 129 if (xfer == NULL) 130 return NULL; 131 132 xfer->fc = fc; 133 xfer->dst = FWLOCALBUS | dst; 134 xfer->spd = spd; 135 xfer->send.len = 16; 136 xfer->send.buf = malloc(xfer->send.len, M_DEVBUF, M_NOWAIT | M_ZERO); 137 138 if (xfer->send.buf == NULL) 139 goto error; 140 141 xfer->send.off = 0; 142 xfer->act.hand = fw_asy_callback; 143 xfer->retry_req = fw_asybusy; 144 xfer->sc = NULL; 145 146 fp = (struct fw_pkt *)xfer->send.buf; 147 fp->mode.rreqb.tcode = FWTCODE_RREQB; 148 fp->mode.rreqb.dst = htons(xfer->dst); 149 fp->mode.rreqb.dest_hi = htons(dst_hi); 150 fp->mode.rreqb.dest_lo = htonl(dst_lo); 151 fp->mode.rreqb.len = htons(len); 152 153 if (fwmem_debug) 154 printf("fwmem: %d %04x:%08x %d\n", dst, dst_hi, dst_lo, len); 155 if (fw_asyreq(fc, -1, xfer) == 0) 156 return xfer; 157 158error: 159 fw_xfer_free(xfer); 160 return NULL; 161} 162 163int 164fwmem_open (dev_t dev, int flags, int fmt, fw_proc *td) 165{ 166 int err = 0; 167 return err; 168} 169 170int 171fwmem_close (dev_t dev, int flags, int fmt, fw_proc *td) 172{ 173 int err = 0; 174 return err; 175} 176 177#define MAXLEN 2048 178#define USE_QUAD 0 179int 180fwmem_read (dev_t dev, struct uio *uio, int ioflag) 181{ 182 struct firewire_softc *sc; 183 struct firewire_comm *fc; 184 struct fw_xfer *xfer; 185 int err = 0, pad; 186 int unit = DEV2UNIT(dev); 187 u_int16_t dst_hi; 188 u_int32_t dst_lo; 189 off_t offset; 190 int len; 191 192 sc = devclass_get_softc(firewire_devclass, unit); 193 fc = sc->fc; 194 195 pad = uio->uio_offset % 4; 196 if (fwmem_debug && pad != 0) 197 printf("unaligned\n"); 198 while(uio->uio_resid > 0) { 199 offset = uio->uio_offset; 200 offset -= pad; 201 dst_hi = (offset >> 32) & 0xffff; 202 dst_lo = offset & 0xffffffff; 203#if USE_QUAD 204 xfer = fwmem_read_quad(fc, fwmem_speed, fwmem_node, 205 dst_hi, dst_lo, fw_asy_callback); 206 if (xfer == NULL) 207 return EINVAL; 208 err = tsleep((caddr_t)xfer, FWPRI, "fwmem", hz); 209 if (err !=0 || xfer->resp != 0 || xfer->recv.buf == NULL) 210 return EINVAL; /* XXX */ 211 err = uiomove(xfer->recv.buf + xfer->recv.off + 4*3 + pad, 212 4 - pad, uio); 213#else 214 len = uio->uio_resid; 215 if (len > MAXLEN) 216 len = MAXLEN; 217 xfer = fwmem_read_block(fc, fwmem_speed, fwmem_node, 218 dst_hi, dst_lo, len, fw_asy_callback); 219 if (xfer == NULL) 220 return EINVAL; 221 err = tsleep((caddr_t)xfer, FWPRI, "fwmem", hz); 222 if (err != 0 || xfer->resp != 0 || xfer->recv.buf == NULL) 223 return EINVAL; /* XXX */ 224 err = uiomove(xfer->recv.buf + xfer->recv.off + 4*4 + pad, 225 len - pad, uio); 226#endif 227 if (err) 228 return err; 229 fw_xfer_free(xfer); 230 pad = 0; 231 } 232 return err; 233} 234int 235fwmem_write (dev_t dev, struct uio *uio, int ioflag) 236{ 237 return EINVAL; 238} 239int 240fwmem_ioctl (dev_t dev, u_long cmd, caddr_t data, int flag, fw_proc *td) 241{ 242 return EINVAL; 243} 244int 245fwmem_poll (dev_t dev, int events, fw_proc *td) 246{ 247 return EINVAL; 248} 249int 250fwmem_mmap (dev_t dev, vm_offset_t offset, int nproto) 251{ 252 return EINVAL; 253} 254