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sys/dev/ic/i82596.c
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1 /* $NetBSD: i82596.c,v 1.8 2005/02/27 00:27:01 perry Exp $ */ 2 3 /* 4 * Copyright (c) 2003 Jochen Kunz. 5 * 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. The name of Jochen Kunz may not be used to endorse or promote 16 * products derived from this software without specific prior 17 * written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY JOCHEN KUNZ 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JOCHEN KUNZ 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Driver for the Intel i82596 10MBit/s Ethernet chip. 34 * It operates the i82596 in 32-Bit Linear Mode, opposed to the old i82586 35 * ie(4) driver (src/sys/dev/ic/i82586.c), that degrades the i82596 to 36 * i82586 compatibility mode. 37 * Documentation about this chip can be found on http://www.openpa.net/ 38 * file names 29021806.pdf and 29021906.pdf 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: i82596.c,v 1.8 2005/02/27 00:27:01 perry Exp $"); 43 44 /* autoconfig and device stuff */ 45 #include <sys/param.h> 46 #include <sys/device.h> 47 #include <sys/conf.h> 48 #include "locators.h" 49 #include "ioconf.h" 50 51 /* bus_space / bus_dma etc. */ 52 #include <machine/bus.h> 53 #include <machine/intr.h> 54 55 /* general system data and functions */ 56 #include <sys/systm.h> 57 #include <sys/ioctl.h> 58 59 /* tsleep / sleep / wakeup */ 60 #include <sys/proc.h> 61 /* hz for above */ 62 #include <sys/kernel.h> 63 64 /* network stuff */ 65 #include <net/if.h> 66 #include <net/if_dl.h> 67 #include <net/if_media.h> 68 #include <net/if_ether.h> 69 #include <sys/socket.h> 70 #include <sys/mbuf.h> 71 72 #include "bpfilter.h" 73 #if NBPFILTER > 0 74 #include <net/bpf.h> 75 #endif 76 77 #include <dev/ic/i82596reg.h> 78 #include <dev/ic/i82596var.h> 79 80 81 82 /* Supported chip variants */ 83 char *i82596_typenames[] = { "unknowen", "DX/SX", "CA" }; 84 85 86 87 /* media change and status callback */ 88 static int iee_mediachange(struct ifnet *); 89 static void iee_mediastatus(struct ifnet *, struct ifmediareq *); 90 91 /* interface routines to upper protocols */ 92 static void iee_start(struct ifnet *); /* initiate output */ 93 static int iee_ioctl(struct ifnet *, u_long, caddr_t); /* ioctl routine */ 94 static int iee_init(struct ifnet *); /* init routine */ 95 static void iee_stop(struct ifnet *, int); /* stop routine */ 96 static void iee_watchdog(struct ifnet *); /* timer routine */ 97 static void iee_drain(struct ifnet *); /* release resources */ 98 99 /* internal helper functions */ 100 static void iee_cb_setup(struct iee_softc *, uint32_t); 101 102 /* 103 Things a MD frontend has to provide: 104 105 The functions via function pointers in the softc: 106 int (*sc_iee_cmd)(struct iee_softc *sc, uint32_t cmd); 107 int (*sc_iee_reset)(struct iee_softc *sc); 108 void (*sc_mediastatus)(struct ifnet *, struct ifmediareq *); 109 int (*sc_mediachange)(struct ifnet *); 110 111 sc_iee_cmd(): send a command to the i82596 by writing the cmd parameter 112 to the SCP cmd word and issuing a Channel Attention. 113 sc_iee_reset(): initiate a reset, supply the address of the SCP to the 114 chip, wait for the chip to initialize and ACK interrupts that 115 this may have caused by caling (sc->sc_iee_cmd)(sc, IEE_SCB_ACK); 116 This functions must carefully bus_dmamap_sync() all data they have touched! 117 118 sc_mediastatus() and sc_mediachange() are just MD hooks to the according 119 MI functions. The MD frontend may set this pointers to NULL when they 120 are not needed. 121 122 sc->sc_type has to be set to I82596_UNKNOWN or I82596_DX or I82596_CA. 123 This is for printing out the correct chip type at attach time only. The 124 MI backend doesn't distinguish different chip types when programming 125 the chip. 126 127 sc->sc_flags has to be set to 0 on litle endian hardware and to 128 IEE_NEED_SWAP on big endian hardware, when endianes conversion is not 129 done by the bus attachment. Usually you need to set IEE_NEED_SWAP 130 when IEE_SYSBUS_BE is set in the sysbus byte. 131 132 sc->sc_cl_align bust be set to 1 or to the cache line size. When set to 133 1 no special alignment of DMA descriptors is done. If sc->sc_cl_align != 1 134 it forces alignment of the data structres in the shared memory to a multiple 135 of sc->sc_cl_align. This is needed on archs like hp700 that have non DMA 136 I/O coherent caches and are unable to map the shared memory uncachable. 137 (At least pre PA7100LC CPUs are unable to map memory uncachable.) 138 139 sc->sc_cl_align MUST BE INITIALIZED BEFORE THE FOLOWING MACROS ARE USED: 140 SC_* IEE_*_SZ IEE_*_OFF IEE_SHMEM_MAX (shell style glob(3) pattern) 141 142 The MD frontend has to allocate a piece of DMA memory at least of 143 IEE_SHMEM_MAX bytes size. All communication with the chip is done via 144 this shared memory. If possible map this memory non-cachable on 145 archs with non DMA I/O coherent caches. The base of the memory needs 146 to be aligend to an even address if sc->sc_cl_align == 1 and aligend 147 to a cache line if sc->sc_cl_align != 1. 148 149 An interrupt with iee_intr() as handler must be established. 150 151 Call void iee_attach(struct iee_softc *sc, uint8_t *ether_address, 152 int *media, int nmedia, int defmedia); when everything is set up. First 153 parameter is a pointer to the MI softc, ether_address is an array that 154 contains the ethernet address. media is an array of the media types 155 provided by the hardware. The members of this array are supplied to 156 ifmedia_add() in sequence. nmedia is the count of elements in media. 157 defmedia is the default media that is set via ifmedia_set(). 158 nmedia and defmedia are ignored when media == NULL. 159 160 The MD backend may call iee_detach() to detach the device. 161 162 See sys/arch/hp700/gsc/if_iee.c for an example. 163 */ 164 165 166 /* 167 How frame reception is done: 168 Each Recieve Frame Descriptor has one associated Recieve Buffer Descriptor. 169 Each RBD points to the data area of a mbuf cluster. The RFDs are linked 170 together in a circular list. sc->sc_rx_done is the count of RFDs in the 171 list already processed / the number of the RFD that has to be checked for 172 a new frame first at the next RX interrupt. Upon successful reception of 173 a frame the mbuf cluster is handled to upper protocol layers, a new mbuf 174 cluster is allocated and the RFD / RBD are reinitialized accordingly. 175 176 When a RFD list overrun occured the whole RFD and RBD lists are reinitialized 177 and frame reception is started again. 178 */ 179 int 180 iee_intr(void *intarg) 181 { 182 struct iee_softc *sc = intarg; 183 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 184 struct iee_rfd *rfd; 185 struct iee_rbd *rbd; 186 bus_dmamap_t rx_map; 187 struct mbuf *rx_mbuf; 188 struct mbuf *new_mbuf; 189 int scb_status; 190 int scb_cmd; 191 int n, col; 192 193 if ((ifp->if_flags & IFF_RUNNING) == 0) { 194 (sc->sc_iee_cmd)(sc, IEE_SCB_ACK); 195 return(1); 196 } 197 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, 0, IEE_SHMEM_MAX, 198 BUS_DMASYNC_POSTREAD); 199 scb_status = SC_SCB->scb_status; 200 scb_cmd = SC_SCB->scb_cmd; 201 rfd = SC_RFD(sc->sc_rx_done); 202 while ((rfd->rfd_status & IEE_RFD_C) != 0) { 203 /* At least one packet was received. */ 204 rbd = SC_RBD(sc->sc_rx_done); 205 rx_map = sc->sc_rx_map[sc->sc_rx_done]; 206 rx_mbuf = sc->sc_rx_mbuf[sc->sc_rx_done]; 207 SC_RBD((sc->sc_rx_done + IEE_NRFD - 1) % IEE_NRFD)->rbd_size 208 &= ~IEE_RBD_EL; 209 if ((rfd->rfd_status & IEE_RFD_OK) == 0 210 || (rbd->rbd_count & IEE_RBD_EOF) == 0 211 || (rbd->rbd_count & IEE_RBD_F) == 0){ 212 /* Receive error, skip frame and reuse buffer. */ 213 rfd->rfd_status = 0; 214 rbd->rbd_count = 0; 215 rbd->rbd_size = IEE_RBD_EL | rx_map->dm_segs[0].ds_len; 216 printf("%s: iee_intr: receive error %d, rfd_status=" 217 "0x%.4x, rfd_count=0x%.4x\n", sc->sc_dev.dv_xname, 218 ++sc->sc_rx_err, rfd->rfd_status, rbd->rbd_count); 219 sc->sc_rx_done = (sc->sc_rx_done + 1) % IEE_NRFD; 220 continue; 221 } 222 rfd->rfd_status = 0; 223 bus_dmamap_sync(sc->sc_dmat, rx_map, 0, rx_mbuf->m_ext.ext_size, 224 BUS_DMASYNC_POSTREAD); 225 rx_mbuf->m_pkthdr.len = rx_mbuf->m_len = 226 rbd->rbd_count & IEE_RBD_COUNT; 227 rx_mbuf->m_pkthdr.rcvif = ifp; 228 MGETHDR(new_mbuf, M_DONTWAIT, MT_DATA); 229 if (new_mbuf == NULL) { 230 printf("%s: iee_intr: can't allocate mbuf\n", 231 sc->sc_dev.dv_xname); 232 break; 233 } 234 MCLAIM(new_mbuf, &sc->sc_ethercom.ec_rx_mowner); 235 MCLGET(new_mbuf, M_DONTWAIT); 236 if ((new_mbuf->m_flags & M_EXT) == 0) { 237 printf("%s: iee_intr: can't alloc mbuf cluster\n", 238 sc->sc_dev.dv_xname); 239 m_freem(new_mbuf); 240 break; 241 } 242 bus_dmamap_unload(sc->sc_dmat, rx_map); 243 if (bus_dmamap_load(sc->sc_dmat, rx_map, 244 new_mbuf->m_ext.ext_buf, new_mbuf->m_ext.ext_size, 245 NULL, BUS_DMA_READ | BUS_DMA_NOWAIT) != 0) 246 panic("%s: iee_intr: can't load RX DMA map\n", 247 sc->sc_dev.dv_xname); 248 bus_dmamap_sync(sc->sc_dmat, rx_map, 0, 249 new_mbuf->m_ext.ext_size, BUS_DMASYNC_PREREAD); 250 #if NBPFILTER > 0 251 if (ifp->if_bpf != 0) 252 bpf_mtap(ifp->if_bpf, rx_mbuf); 253 #endif /* NBPFILTER > 0 */ 254 (*ifp->if_input)(ifp, rx_mbuf); 255 ifp->if_ipackets++; 256 sc->sc_rx_mbuf[sc->sc_rx_done] = new_mbuf; 257 rbd->rbd_count = 0; 258 rbd->rbd_size = IEE_RBD_EL | rx_map->dm_segs[0].ds_len; 259 rbd->rbd_rb_addr = rx_map->dm_segs[0].ds_addr; 260 sc->sc_rx_done = (sc->sc_rx_done + 1) % IEE_NRFD; 261 rfd = SC_RFD(sc->sc_rx_done); 262 } 263 if ((scb_status & IEE_SCB_RUS) == IEE_SCB_RUS_NR1 264 || (scb_status & IEE_SCB_RUS) == IEE_SCB_RUS_NR2 265 || (scb_status & IEE_SCB_RUS) == IEE_SCB_RUS_NR3) { 266 /* Receive Overrun, reinit receive ring buffer. */ 267 for (n = 0 ; n < IEE_NRFD ; n++) { 268 SC_RFD(n)->rfd_cmd = IEE_RFD_SF; 269 SC_RFD(n)->rfd_link_addr = IEE_PHYS_SHMEM(IEE_RFD_OFF 270 + IEE_RFD_SZ * ((n + 1) % IEE_NRFD)); 271 SC_RBD(n)->rbd_next_rbd = IEE_PHYS_SHMEM(IEE_RBD_OFF 272 + IEE_RBD_SZ * ((n + 1) % IEE_NRFD)); 273 SC_RBD(n)->rbd_size = IEE_RBD_EL | 274 sc->sc_rx_map[n]->dm_segs[0].ds_len; 275 SC_RBD(n)->rbd_rb_addr = 276 sc->sc_rx_map[n]->dm_segs[0].ds_addr; 277 } 278 SC_RFD(0)->rfd_rbd_addr = IEE_PHYS_SHMEM(IEE_RBD_OFF); 279 sc->sc_rx_done = 0; 280 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_RFD_OFF, 281 IEE_RFD_LIST_SZ + IEE_RBD_LIST_SZ, BUS_DMASYNC_PREWRITE); 282 (sc->sc_iee_cmd)(sc, IEE_SCB_RUC_ST); 283 printf("%s: iee_intr: receive ring buffer overrun\n", 284 sc->sc_dev.dv_xname); 285 } 286 287 if (sc->sc_next_cb != 0 288 && (SC_CB(sc->sc_next_cb - 1)->cb_status & IEE_CB_C) != 0) { 289 /* CMD list finished */ 290 ifp->if_timer = 0; 291 if (sc->sc_next_tbd != 0) { 292 /* A TX CMD list finished, clenup */ 293 for (n = 0 ; n < sc->sc_next_cb ; n++) { 294 m_freem(sc->sc_tx_mbuf[n]); 295 sc->sc_tx_mbuf[n] = NULL; 296 bus_dmamap_unload(sc->sc_dmat,sc->sc_tx_map[n]); 297 if ((SC_CB(n)->cb_status & IEE_CB_COL) != 0 && 298 (SC_CB(n)->cb_status & IEE_CB_MAXCOL) == 0) 299 col = 16; 300 else 301 col = SC_CB(n)->cb_status 302 & IEE_CB_MAXCOL; 303 sc->sc_tx_col += col; 304 if ((SC_CB(n)->cb_status & IEE_CB_OK) != 0) { 305 ifp->if_opackets++; 306 ifp->if_collisions += col; 307 } 308 } 309 sc->sc_next_tbd = 0; 310 ifp->if_flags &= ~IFF_OACTIVE; 311 } 312 for (n = 0 ; n < sc->sc_next_cb ; n++) { 313 /* Check if a CMD failed, but ignore TX errors. */ 314 if ((SC_CB(n)->cb_cmd & IEE_CB_CMD) != IEE_CB_CMD_TR 315 && ((SC_CB(n)->cb_status & IEE_CB_OK) == 0)) 316 printf("%s: iee_intr: scb_status=0x%x " 317 "scb_cmd=0x%x failed command %d: " 318 "cb_status[%d]=0x%.4x cb_cmd[%d]=0x%.4x\n", 319 sc->sc_dev.dv_xname, scb_status, scb_cmd, 320 ++sc->sc_cmd_err, n, SC_CB(n)->cb_status, 321 n, SC_CB(n)->cb_cmd); 322 } 323 sc->sc_next_cb = 0; 324 if ((sc->sc_flags & IEE_WANT_MCAST) != 0) { 325 iee_cb_setup(sc, IEE_CB_CMD_MCS | IEE_CB_S | IEE_CB_EL 326 | IEE_CB_I); 327 (sc->sc_iee_cmd)(sc, IEE_SCB_CUC_EXE); 328 } else 329 /* Try to get defered packets going. */ 330 iee_start(ifp); 331 } 332 if (IEE_SWAP(SC_SCB->scb_crc_err) != sc->sc_crc_err) { 333 sc->sc_crc_err = IEE_SWAP(SC_SCB->scb_crc_err); 334 printf("%s: iee_intr: crc_err=%d\n", sc->sc_dev.dv_xname, 335 sc->sc_crc_err); 336 } 337 if (IEE_SWAP(SC_SCB->scb_align_err) != sc->sc_align_err) { 338 sc->sc_align_err = IEE_SWAP(SC_SCB->scb_align_err); 339 printf("%s: iee_intr: align_err=%d\n", sc->sc_dev.dv_xname, 340 sc->sc_align_err); 341 } 342 if (IEE_SWAP(SC_SCB->scb_resource_err) != sc->sc_resource_err) { 343 sc->sc_resource_err = IEE_SWAP(SC_SCB->scb_resource_err); 344 printf("%s: iee_intr: resource_err=%d\n", sc->sc_dev.dv_xname, 345 sc->sc_resource_err); 346 } 347 if (IEE_SWAP(SC_SCB->scb_overrun_err) != sc->sc_overrun_err) { 348 sc->sc_overrun_err = IEE_SWAP(SC_SCB->scb_overrun_err); 349 printf("%s: iee_intr: overrun_err=%d\n", sc->sc_dev.dv_xname, 350 sc->sc_overrun_err); 351 } 352 if (IEE_SWAP(SC_SCB->scb_rcvcdt_err) != sc->sc_rcvcdt_err) { 353 sc->sc_rcvcdt_err = IEE_SWAP(SC_SCB->scb_rcvcdt_err); 354 printf("%s: iee_intr: rcvcdt_err=%d\n", sc->sc_dev.dv_xname, 355 sc->sc_rcvcdt_err); 356 } 357 if (IEE_SWAP(SC_SCB->scb_short_fr_err) != sc->sc_short_fr_err) { 358 sc->sc_short_fr_err = IEE_SWAP(SC_SCB->scb_short_fr_err); 359 printf("%s: iee_intr: short_fr_err=%d\n", sc->sc_dev.dv_xname, 360 sc->sc_short_fr_err); 361 } 362 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, 0, IEE_SHMEM_MAX, 363 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 364 (sc->sc_iee_cmd)(sc, IEE_SCB_ACK); 365 return(1); 366 } 367 368 369 370 /* 371 How Command Block List Processing is done. 372 373 A runing CBL is never manipulated. If there is a CBL already runing, 374 further CMDs are deferd until the current list is done. A new list is 375 setup when the old has finished. 376 This eases programming. To manipulate a runing CBL it is neccesary to 377 suspend the Command Unit to avoid race conditions. After a suspend 378 is sent we have to wait for an interrupt that ACKs the suspend. Then 379 we can manipulate the CBL and resume operation. I am not sure that this 380 is more effective then the current, much simpler approach. => KISS 381 See i82596CA data sheet page 26. 382 383 A CBL is runing or on the way to be set up when (sc->sc_next_cb != 0). 384 385 A CBL may consist of TX CMDs, and _only_ TX CMDs. 386 A TX CBL is runing or on the way to be set up when 387 ((sc->sc_next_cb != 0) && (sc->sc_next_tbd != 0)). 388 389 A CBL may consist of other non-TX CMDs like IAS or CONF, and _only_ 390 non-TX CMDs. 391 392 This comes mostly through the way how an Ethernet driver works and 393 because runing CBLs are not manipulated when they are on the way. If 394 if_start() is called there will be TX CMDs enqueued so we have a runing 395 CBL and other CMDs from e.g. if_ioctl() will be deferd and vice versa. 396 397 The Multicast Setup Command is special. A MCS needs more space then 398 a single CB has. Actual space requiement depends on the length of the 399 multicast list. So we allways defer MCS until other CBLs are finished, 400 then we setup a CONF CMD in the first CB. The CONF CMD is needed to 401 turn ALLMULTI on the hardware on or off. The MCS is the 2nd CB and may 402 use all the remaining space in the CBL and the Transmit Buffer Descriptor 403 List. (Therefore CBL and TBDL must be continious in pysical and virtual 404 memory. This is guaranteed through the definitions of the list offsets 405 in i82596reg.h and because it is only a single DMA segment used for all 406 lists.) When ALLMULTI is enabled via the CONF CMD, the MCS is run with 407 a multicast list length of 0, thus disabling the multicast filter. 408 A defered MCS is signaled via ((sc->sc_flags & IEE_WANT_MCAST) != 0) 409 */ 410 void 411 iee_cb_setup(struct iee_softc *sc, uint32_t cmd) 412 { 413 struct iee_cb *cb = SC_CB(sc->sc_next_cb); 414 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 415 struct ether_multistep step; 416 struct ether_multi *enm; 417 418 memset(cb, 0, IEE_CB_SZ); 419 cb->cb_cmd = cmd; 420 switch(cmd & IEE_CB_CMD) { 421 case IEE_CB_CMD_NOP: /* NOP CMD */ 422 break; 423 case IEE_CB_CMD_IAS: /* Individual Address Setup */ 424 memcpy((void*)cb->cb_ind_addr, LLADDR(ifp->if_sadl), 425 ETHER_ADDR_LEN); 426 break; 427 case IEE_CB_CMD_CONF: /* Configure */ 428 memcpy((void*)cb->cb_cf, sc->sc_cf, sc->sc_cf[0] 429 & IEE_CF_0_CNT_M); 430 break; 431 case IEE_CB_CMD_MCS: /* Multicast Setup */ 432 if (sc->sc_next_cb != 0) { 433 sc->sc_flags |= IEE_WANT_MCAST; 434 return; 435 } 436 sc->sc_flags &= ~IEE_WANT_MCAST; 437 if ((sc->sc_cf[8] & IEE_CF_8_PRM) != 0) { 438 /* Need no multicast filter in promisc mode. */ 439 iee_cb_setup(sc, IEE_CB_CMD_CONF | IEE_CB_S | IEE_CB_EL 440 | IEE_CB_I); 441 return; 442 } 443 /* Leave room for a CONF CMD to en/dis-able ALLMULTI mode */ 444 cb = SC_CB(sc->sc_next_cb + 1); 445 cb->cb_cmd = cmd; 446 cb->cb_mcast.mc_size = 0; 447 ETHER_FIRST_MULTI(step, &sc->sc_ethercom, enm); 448 while (enm != NULL) { 449 if (memcmp(enm->enm_addrlo, enm->enm_addrhi, 450 ETHER_ADDR_LEN) != 0 || cb->cb_mcast.mc_size 451 * ETHER_ADDR_LEN + 2 * IEE_CB_SZ 452 > IEE_CB_LIST_SZ + IEE_TBD_LIST_SZ) { 453 cb->cb_mcast.mc_size = 0; 454 break; 455 } 456 memcpy((void*) &cb->cb_mcast.mc_addrs[ 457 cb->cb_mcast.mc_size * ETHER_ADDR_LEN], 458 enm->enm_addrlo, ETHER_ADDR_LEN); 459 ETHER_NEXT_MULTI(step, enm); 460 cb->cb_mcast.mc_size++; 461 } 462 if (cb->cb_mcast.mc_size == 0) { 463 /* Can't do exact mcast filtering, do ALLMULTI mode. */ 464 ifp->if_flags |= IFF_ALLMULTI; 465 sc->sc_cf[11] &= ~IEE_CF_11_MCALL; 466 } else { 467 /* disable ALLMULTI and load mcast list */ 468 ifp->if_flags &= ~IFF_ALLMULTI; 469 sc->sc_cf[11] |= IEE_CF_11_MCALL; 470 /* Mcast setup may need more then IEE_CB_SZ bytes. */ 471 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, 472 IEE_CB_OFF, IEE_CB_LIST_SZ + IEE_TBD_LIST_SZ, 473 BUS_DMASYNC_PREWRITE); 474 } 475 iee_cb_setup(sc, IEE_CB_CMD_CONF); 476 break; 477 case IEE_CB_CMD_TR: /* Transmit */ 478 cb->cb_transmit.tx_tbd_addr = IEE_PHYS_SHMEM(IEE_TBD_OFF 479 + IEE_TBD_SZ * sc->sc_next_tbd); 480 cb->cb_cmd |= IEE_CB_SF; /* Allways use Flexible Mode. */ 481 break; 482 case IEE_CB_CMD_TDR: /* Time Domain Reflectometry */ 483 break; 484 case IEE_CB_CMD_DUMP: /* Dump */ 485 break; 486 case IEE_CB_CMD_DIAG: /* Diagnose */ 487 break; 488 default: 489 /* can't happen */ 490 break; 491 } 492 cb->cb_link_addr = IEE_PHYS_SHMEM(IEE_CB_OFF + IEE_CB_SZ * 493 (sc->sc_next_cb + 1)); 494 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_CB_OFF 495 + IEE_CB_SZ * sc->sc_next_cb, IEE_CB_SZ, BUS_DMASYNC_PREWRITE); 496 sc->sc_next_cb++; 497 ifp->if_timer = 5; 498 return; 499 } 500 501 502 503 void 504 iee_attach(struct iee_softc *sc, uint8_t *eth_addr, int *media, int nmedia, 505 int defmedia) 506 { 507 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 508 int n; 509 510 /* Set pointer to Intermediate System Configuration Pointer. */ 511 /* Phys. addr. in big endian order. (Big endian as defined by Intel.) */ 512 SC_SCP->scp_iscp_addr = IEE_SWAP(IEE_PHYS_SHMEM(IEE_ISCP_OFF)); 513 /* Set pointer to System Control Block. */ 514 /* Phys. addr. in big endian order. (Big endian as defined by Intel.) */ 515 SC_ISCP->iscp_scb_addr = IEE_SWAP(IEE_PHYS_SHMEM(IEE_SCB_OFF)); 516 /* Set pointer to Receive Frame Area. (physical address) */ 517 SC_SCB->scb_rfa_addr = IEE_PHYS_SHMEM(IEE_RFD_OFF); 518 /* Set pointer to Command Block. (physical address) */ 519 SC_SCB->scb_cmd_blk_addr = IEE_PHYS_SHMEM(IEE_CB_OFF); 520 521 ifmedia_init(&sc->sc_ifmedia, 0, iee_mediachange, iee_mediastatus); 522 if (media != NULL) { 523 for (n = 0 ; n < nmedia ; n++) 524 ifmedia_add(&sc->sc_ifmedia, media[n], 0, NULL); 525 ifmedia_set(&sc->sc_ifmedia, defmedia); 526 } else { 527 ifmedia_add(&sc->sc_ifmedia, IFM_ETHER | IFM_NONE, 0, NULL); 528 ifmedia_set(&sc->sc_ifmedia, IFM_ETHER | IFM_NONE); 529 } 530 531 ifp->if_softc = sc; 532 strcpy(ifp->if_xname, sc->sc_dev.dv_xname); 533 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 534 ifp->if_start = iee_start; /* initiate output routine */ 535 ifp->if_ioctl = iee_ioctl; /* ioctl routine */ 536 ifp->if_init = iee_init; /* init routine */ 537 ifp->if_stop = iee_stop; /* stop routine */ 538 ifp->if_watchdog = iee_watchdog; /* timer routine */ 539 ifp->if_drain = iee_drain; /* routine to release resources */ 540 IFQ_SET_READY(&ifp->if_snd); 541 /* iee supports IEEE 802.1Q Virtual LANs, see vlan(4). */ 542 sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU; 543 544 if_attach(ifp); 545 ether_ifattach(ifp, eth_addr); 546 547 aprint_normal(": Intel 82596%s address %s\n", 548 i82596_typenames[ sc->sc_type], ether_sprintf(eth_addr)); 549 550 for (n = 0 ; n < IEE_NCB ; n++) 551 sc->sc_tx_map[n] = NULL; 552 for (n = 0 ; n < IEE_NRFD ; n++) { 553 sc->sc_rx_mbuf[n] = NULL; 554 sc->sc_rx_map[n] = NULL; 555 } 556 sc->sc_tx_timeout = 0; 557 sc->sc_setup_timeout = 0; 558 (sc->sc_iee_reset)(sc); 559 return; 560 } 561 562 563 564 void 565 iee_detach(struct iee_softc *sc, int flags) 566 { 567 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 568 569 if ((ifp->if_flags & IFF_RUNNING) != 0) 570 iee_stop(ifp, 1); 571 ether_ifdetach(ifp); 572 if_detach(ifp); 573 return; 574 } 575 576 577 578 /* media change and status callback */ 579 int 580 iee_mediachange(struct ifnet *ifp) 581 { 582 struct iee_softc *sc = ifp->if_softc; 583 584 if (sc->sc_mediachange != NULL) 585 return ((sc->sc_mediachange)(ifp)); 586 return(0); 587 } 588 589 590 591 void 592 iee_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmreq) 593 { 594 struct iee_softc *sc = ifp->if_softc; 595 596 if (sc->sc_mediastatus != NULL) 597 return ((sc->sc_mediastatus)(ifp, ifmreq)); 598 return; 599 } 600 601 602 603 /* initiate output routine */ 604 void 605 iee_start(struct ifnet *ifp) 606 { 607 struct iee_softc *sc = ifp->if_softc; 608 struct mbuf *m = NULL; 609 int t; 610 int n; 611 612 if (sc->sc_next_cb != 0) 613 /* There is already a CMD runing. Defer packet enqueueing. */ 614 return; 615 for (t = 0 ; t < IEE_NCB ; t++) { 616 IFQ_DEQUEUE(&ifp->if_snd, sc->sc_tx_mbuf[t]); 617 if (sc->sc_tx_mbuf[t] == NULL) 618 break; 619 if (bus_dmamap_load_mbuf(sc->sc_dmat, sc->sc_tx_map[t], 620 sc->sc_tx_mbuf[t], BUS_DMA_WRITE | BUS_DMA_NOWAIT) != 0) { 621 /* 622 * The packet needs more TBD then we support. 623 * Copy the packet into a mbuf cluster to get it out. 624 */ 625 printf("%s: iee_start: failed to load DMA map\n", 626 sc->sc_dev.dv_xname); 627 MGETHDR(m, M_DONTWAIT, MT_DATA); 628 if (m == NULL) { 629 printf("%s: iee_start: can't allocate mbuf\n", 630 sc->sc_dev.dv_xname); 631 m_freem(sc->sc_tx_mbuf[t]); 632 t--; 633 continue; 634 } 635 MCLAIM(m, &sc->sc_ethercom.ec_rx_mowner); 636 MCLGET(m, M_DONTWAIT); 637 if ((m->m_flags & M_EXT) == 0) { 638 printf("%s: iee_start: can't allocate mbuf " 639 "cluster\n", sc->sc_dev.dv_xname); 640 m_freem(sc->sc_tx_mbuf[t]); 641 m_freem(m); 642 t--; 643 continue; 644 } 645 m_copydata(sc->sc_tx_mbuf[t], 0, 646 sc->sc_tx_mbuf[t]->m_pkthdr.len, mtod(m, caddr_t)); 647 m->m_pkthdr.len = sc->sc_tx_mbuf[t]->m_pkthdr.len; 648 m->m_len = sc->sc_tx_mbuf[t]->m_pkthdr.len; 649 m_freem(sc->sc_tx_mbuf[t]); 650 sc->sc_tx_mbuf[t] = m; 651 if(bus_dmamap_load_mbuf(sc->sc_dmat, sc->sc_tx_map[t], 652 m, BUS_DMA_WRITE | BUS_DMA_NOWAIT) != 0) { 653 printf("%s: iee_start: can't load TX DMA map\n", 654 sc->sc_dev.dv_xname); 655 m_freem(sc->sc_tx_mbuf[t]); 656 t--; 657 continue; 658 } 659 } 660 for (n = 0 ; n < sc->sc_tx_map[t]->dm_nsegs ; n++) { 661 SC_TBD(sc->sc_next_tbd + n)->tbd_tb_addr = 662 sc->sc_tx_map[t]->dm_segs[n].ds_addr; 663 SC_TBD(sc->sc_next_tbd + n)->tbd_size = 664 sc->sc_tx_map[t]->dm_segs[n].ds_len; 665 SC_TBD(sc->sc_next_tbd + n)->tbd_link_addr = 666 IEE_PHYS_SHMEM(IEE_TBD_OFF + IEE_TBD_SZ 667 * (sc->sc_next_tbd + n + 1)); 668 } 669 SC_TBD(sc->sc_next_tbd + n - 1)->tbd_size |= IEE_CB_EL; 670 bus_dmamap_sync(sc->sc_dmat, sc->sc_tx_map[t], 0, 671 sc->sc_tx_map[t]->dm_mapsize, BUS_DMASYNC_PREWRITE); 672 IFQ_POLL(&ifp->if_snd, m); 673 if (m == NULL) 674 iee_cb_setup(sc, IEE_CB_CMD_TR | IEE_CB_S | IEE_CB_EL 675 | IEE_CB_I); 676 else 677 iee_cb_setup(sc, IEE_CB_CMD_TR); 678 sc->sc_next_tbd += n; 679 #if NBPFILTER > 0 680 /* Pass packet to bpf if someone listens. */ 681 if (ifp->if_bpf) 682 bpf_mtap(ifp->if_bpf, sc->sc_tx_mbuf[t]); 683 #endif 684 } 685 if (t == 0) 686 /* No packets got set up for TX. */ 687 return; 688 if (t == IEE_NCB) 689 ifp->if_flags |= IFF_OACTIVE; 690 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_CB_SZ, 691 IEE_CB_LIST_SZ + IEE_TBD_LIST_SZ, BUS_DMASYNC_PREWRITE); 692 (sc->sc_iee_cmd)(sc, IEE_SCB_CUC_EXE); 693 return; 694 } 695 696 697 698 /* ioctl routine */ 699 int 700 iee_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 701 { 702 struct iee_softc *sc = ifp->if_softc; 703 int s; 704 int err; 705 706 s = splnet(); 707 switch (cmd) { 708 case SIOCSIFMEDIA: 709 case SIOCGIFMEDIA: 710 err = ifmedia_ioctl(ifp, (struct ifreq *) data, 711 &sc->sc_ifmedia, cmd); 712 break; 713 714 default: 715 err = ether_ioctl(ifp, cmd, data); 716 if (err == ENETRESET) { 717 /* 718 * Multicast list as changed; set the hardware filter 719 * accordingly. 720 */ 721 if (ifp->if_flags & IFF_RUNNING) { 722 iee_cb_setup(sc, IEE_CB_CMD_MCS | IEE_CB_S | 723 IEE_CB_EL | IEE_CB_I); 724 if ((sc->sc_flags & IEE_WANT_MCAST) == 0) 725 (*sc->sc_iee_cmd)(sc, IEE_SCB_CUC_EXE); 726 } 727 err = 0; 728 } 729 break; 730 } 731 splx(s); 732 return(err); 733 } 734 735 736 737 /* init routine */ 738 int 739 iee_init(struct ifnet *ifp) 740 { 741 struct iee_softc *sc = ifp->if_softc; 742 int r; 743 int t; 744 int n; 745 int err; 746 747 sc->sc_next_cb = 0; 748 sc->sc_next_tbd = 0; 749 sc->sc_flags &= ~IEE_WANT_MCAST; 750 sc->sc_rx_done = 0; 751 SC_SCB->scb_crc_err = 0; 752 SC_SCB->scb_align_err = 0; 753 SC_SCB->scb_resource_err = 0; 754 SC_SCB->scb_overrun_err = 0; 755 SC_SCB->scb_rcvcdt_err = 0; 756 SC_SCB->scb_short_fr_err = 0; 757 sc->sc_crc_err = 0; 758 sc->sc_align_err = 0; 759 sc->sc_resource_err = 0; 760 sc->sc_overrun_err = 0; 761 sc->sc_rcvcdt_err = 0; 762 sc->sc_short_fr_err = 0; 763 sc->sc_tx_col = 0; 764 sc->sc_rx_err = 0; 765 sc->sc_cmd_err = 0; 766 /* Create Transmit DMA maps. */ 767 for (t = 0 ; t < IEE_NCB ; t++) { 768 if (sc->sc_tx_map[t] == NULL && bus_dmamap_create(sc->sc_dmat, 769 MCLBYTES, IEE_NTBD, MCLBYTES, 0, BUS_DMA_NOWAIT, 770 &sc->sc_tx_map[t]) != 0) { 771 printf("%s: iee_init: can't create TX DMA map\n", 772 sc->sc_dev.dv_xname); 773 for (n = 0 ; n < t ; n++) 774 bus_dmamap_destroy(sc->sc_dmat, 775 sc->sc_tx_map[n]); 776 return(ENOBUFS); 777 } 778 } 779 /* Initialize Receive Frame and Receive Buffer Descriptors */ 780 err = 0; 781 memset(SC_RFD(0), 0, IEE_RFD_LIST_SZ); 782 memset(SC_RBD(0), 0, IEE_RBD_LIST_SZ); 783 for (r = 0 ; r < IEE_NRFD ; r++) { 784 SC_RFD(r)->rfd_cmd = IEE_RFD_SF; 785 SC_RFD(r)->rfd_link_addr = IEE_PHYS_SHMEM(IEE_RFD_OFF 786 + IEE_RFD_SZ * ((r + 1) % IEE_NRFD)); 787 788 SC_RBD(r)->rbd_next_rbd = IEE_PHYS_SHMEM(IEE_RBD_OFF 789 + IEE_RBD_SZ * ((r + 1) % IEE_NRFD)); 790 if (sc->sc_rx_mbuf[r] == NULL) { 791 MGETHDR(sc->sc_rx_mbuf[r], M_DONTWAIT, MT_DATA); 792 if (sc->sc_rx_mbuf[r] == NULL) { 793 printf("%s: iee_init: can't allocate mbuf\n", 794 sc->sc_dev.dv_xname); 795 err = 1; 796 break; 797 } 798 MCLAIM(sc->sc_rx_mbuf[r],&sc->sc_ethercom.ec_rx_mowner); 799 MCLGET(sc->sc_rx_mbuf[r], M_DONTWAIT); 800 if ((sc->sc_rx_mbuf[r]->m_flags & M_EXT) == 0) { 801 printf("%s: iee_init: can't allocate mbuf" 802 " cluster\n", sc->sc_dev.dv_xname); 803 m_freem(sc->sc_rx_mbuf[r]); 804 err = 1; 805 break; 806 } 807 } 808 if (sc->sc_rx_map[r] == NULL && bus_dmamap_create(sc->sc_dmat, 809 MCLBYTES, 1, MCLBYTES , 0, BUS_DMA_NOWAIT, 810 &sc->sc_rx_map[r]) != 0) { 811 printf("%s: iee_init: can't create RX " 812 "DMA map\n", sc->sc_dev.dv_xname); 813 m_freem(sc->sc_rx_mbuf[r]); 814 err = 1; 815 break; 816 } 817 if (bus_dmamap_load(sc->sc_dmat, sc->sc_rx_map[r], 818 sc->sc_rx_mbuf[r]->m_ext.ext_buf, 819 sc->sc_rx_mbuf[r]->m_ext.ext_size, NULL, 820 BUS_DMA_READ | BUS_DMA_NOWAIT) != 0) { 821 printf("%s: iee_init: can't load RX DMA map\n", 822 sc->sc_dev.dv_xname); 823 bus_dmamap_destroy(sc->sc_dmat, sc->sc_rx_map[r]); 824 m_freem(sc->sc_rx_mbuf[r]); 825 err = 1; 826 break; 827 } 828 bus_dmamap_sync(sc->sc_dmat, sc->sc_rx_map[r], 0, 829 sc->sc_rx_mbuf[r]->m_ext.ext_size, BUS_DMASYNC_PREREAD); 830 SC_RBD(r)->rbd_size = sc->sc_rx_map[r]->dm_segs[0].ds_len; 831 SC_RBD(r)->rbd_rb_addr= sc->sc_rx_map[r]->dm_segs[0].ds_addr; 832 } 833 SC_RFD(0)->rfd_rbd_addr = IEE_PHYS_SHMEM(IEE_RBD_OFF); 834 if (err != 0) { 835 for (n = 0 ; n < r; n++) { 836 m_freem(sc->sc_rx_mbuf[n]); 837 sc->sc_rx_mbuf[n] = NULL; 838 bus_dmamap_unload(sc->sc_dmat, sc->sc_rx_map[n]); 839 bus_dmamap_destroy(sc->sc_dmat, sc->sc_rx_map[n]); 840 sc->sc_rx_map[n] = NULL; 841 } 842 for (n = 0 ; n < t ; n++) { 843 bus_dmamap_destroy(sc->sc_dmat, sc->sc_tx_map[n]); 844 sc->sc_tx_map[n] = NULL; 845 } 846 return(ENOBUFS); 847 } 848 849 (sc->sc_iee_reset)(sc); 850 iee_cb_setup(sc, IEE_CB_CMD_IAS); 851 sc->sc_cf[0] = IEE_CF_0_DEF | IEE_CF_0_PREF; 852 sc->sc_cf[1] = IEE_CF_1_DEF; 853 sc->sc_cf[2] = IEE_CF_2_DEF; 854 sc->sc_cf[3] = IEE_CF_3_ADDRLEN_DEF | IEE_CF_3_NSAI 855 | IEE_CF_3_PREAMLEN_DEF; 856 sc->sc_cf[4] = IEE_CF_4_DEF; 857 sc->sc_cf[5] = IEE_CF_5_DEF; 858 sc->sc_cf[6] = IEE_CF_6_DEF; 859 sc->sc_cf[7] = IEE_CF_7_DEF; 860 sc->sc_cf[8] = IEE_CF_8_DEF; 861 sc->sc_cf[9] = IEE_CF_9_DEF; 862 sc->sc_cf[10] = IEE_CF_10_DEF; 863 sc->sc_cf[11] = IEE_CF_11_DEF & ~IEE_CF_11_LNGFLD; 864 sc->sc_cf[12] = IEE_CF_12_DEF; 865 sc->sc_cf[13] = IEE_CF_13_DEF; 866 iee_cb_setup(sc, IEE_CB_CMD_CONF | IEE_CB_S | IEE_CB_EL); 867 SC_SCB->scb_rfa_addr = IEE_PHYS_SHMEM(IEE_RFD_OFF); 868 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, 0, IEE_SHMEM_MAX, 869 BUS_DMASYNC_PREWRITE); 870 (sc->sc_iee_cmd)(sc, IEE_SCB_CUC_EXE | IEE_SCB_RUC_ST); 871 /* Issue a Channel Attention to ACK interrupts we may have caused. */ 872 (sc->sc_iee_cmd)(sc, IEE_SCB_ACK); 873 874 /* Mark the interface as running and ready to RX/TX packets. */ 875 ifp->if_flags |= IFF_RUNNING; 876 ifp->if_flags &= ~IFF_OACTIVE; 877 return(0); 878 } 879 880 881 882 /* stop routine */ 883 void 884 iee_stop(struct ifnet *ifp, int disable) 885 { 886 struct iee_softc *sc = ifp->if_softc; 887 int n; 888 889 ifp->if_flags &= ~IFF_RUNNING; 890 ifp->if_flags |= IFF_OACTIVE; 891 ifp->if_timer = 0; 892 /* Reset the chip to get it quiet. */ 893 (sc->sc_iee_reset)(ifp->if_softc); 894 /* Issue a Channel Attention to ACK interrupts we may have caused. */ 895 (sc->sc_iee_cmd)(ifp->if_softc, IEE_SCB_ACK); 896 /* Release any dynamically allocated ressources. */ 897 for (n = 0 ; n < IEE_NCB ; n++) { 898 if (sc->sc_tx_map[n] != NULL) 899 bus_dmamap_destroy(sc->sc_dmat, sc->sc_tx_map[n]); 900 sc->sc_tx_map[n] = NULL; 901 } 902 for (n = 0 ; n < IEE_NRFD ; n++) { 903 if (sc->sc_rx_mbuf[n] != NULL) 904 m_freem(sc->sc_rx_mbuf[n]); 905 sc->sc_rx_mbuf[n] = NULL; 906 if (sc->sc_rx_map[n] != NULL) { 907 bus_dmamap_unload(sc->sc_dmat, sc->sc_rx_map[n]); 908 bus_dmamap_destroy(sc->sc_dmat, sc->sc_rx_map[n]); 909 } 910 sc->sc_rx_map[n] = NULL; 911 } 912 return; 913 } 914 915 916 917 /* timer routine */ 918 void 919 iee_watchdog(struct ifnet *ifp) 920 { 921 struct iee_softc *sc = ifp->if_softc; 922 923 (sc->sc_iee_reset)(sc); 924 if (sc->sc_next_tbd != 0) 925 printf("%s: iee_watchdog: transmit timeout %d\n", 926 sc->sc_dev.dv_xname, ++sc->sc_tx_timeout); 927 else 928 printf("%s: iee_watchdog: setup timeout %d\n", 929 sc->sc_dev.dv_xname, ++sc->sc_setup_timeout); 930 iee_init(ifp); 931 return; 932 } 933 934 935 936 /* routine to release res. */ 937 void 938 iee_drain(struct ifnet *ifp) 939 { 940 iee_stop(ifp, 0); 941 return; 942 } 943 944 945
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