Annotation of sys/dev/ic/midway.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: midway.c,v 1.37 2006/03/25 22:41:43 djm Exp $ */
! 2: /* (sync'd to midway.c 1.68) */
! 3:
! 4: /*
! 5: *
! 6: * Copyright (c) 1996 Charles D. Cranor and Washington University.
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: * 2. Redistributions in binary form must reproduce the above copyright
! 15: * notice, this list of conditions and the following disclaimer in the
! 16: * documentation and/or other materials provided with the distribution.
! 17: * 3. All advertising materials mentioning features or use of this software
! 18: * must display the following acknowledgement:
! 19: * This product includes software developed by Charles D. Cranor and
! 20: * Washington University.
! 21: * 4. The name of the author may not be used to endorse or promote products
! 22: * derived from this software without specific prior written permission.
! 23: *
! 24: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 25: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 26: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 27: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 28: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 29: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 30: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 31: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 32: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 33: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 34: */
! 35:
! 36: /*
! 37: *
! 38: * m i d w a y . c e n i 1 5 5 d r i v e r
! 39: *
! 40: * author: Chuck Cranor <chuck@ccrc.wustl.edu>
! 41: * started: spring, 1996 (written from scratch).
! 42: *
! 43: * notes from the author:
! 44: * Extra special thanks go to Werner Almesberger, EPFL LRC. Werner's
! 45: * ENI driver was especially useful in figuring out how this card works.
! 46: * I would also like to thank Werner for promptly answering email and being
! 47: * generally helpful.
! 48: */
! 49:
! 50:
! 51: #undef EN_DEBUG
! 52: #undef EN_DEBUG_RANGE /* check ranges on en_read/en_write's? */
! 53: #define EN_MBUF_OPT /* try and put more stuff in mbuf? */
! 54: #define EN_DIAG
! 55: #define EN_STAT
! 56: #ifndef EN_DMA
! 57: #define EN_DMA 1 /* use dma? */
! 58: #endif
! 59: #define EN_NOTXDMA 0 /* hook to disable tx dma only */
! 60: #define EN_NORXDMA 0 /* hook to disable rx dma only */
! 61: #define EN_NOWMAYBE 1 /* hook to disable word maybe DMA */
! 62: /* XXX: WMAYBE doesn't work, needs debugging */
! 63: #define EN_DDBHOOK 1 /* compile in ddb functions */
! 64: #if defined(MIDWAY_ADPONLY)
! 65: #define EN_ENIDMAFIX 0 /* no ENI cards to worry about */
! 66: #else
! 67: #define EN_ENIDMAFIX 1 /* avoid byte DMA on the ENI card (see below) */
! 68: #endif
! 69:
! 70: /*
! 71: * note on EN_ENIDMAFIX: the byte aligner on the ENI version of the card
! 72: * appears to be broken. it works just fine if there is no load... however
! 73: * when the card is loaded the data get corrupted. to see this, one only
! 74: * has to use "telnet" over ATM. do the following command in "telnet":
! 75: * cat /usr/share/misc/termcap
! 76: * "telnet" seems to generate lots of 1023 byte mbufs (which make great
! 77: * use of the byte aligner). watch "netstat -s" for checksum errors.
! 78: *
! 79: * I further tested this by adding a function that compared the transmit
! 80: * data on the card's SRAM with the data in the mbuf chain _after_ the
! 81: * "transmit DMA complete" interrupt. using the "telnet" test I got data
! 82: * mismatches where the byte-aligned data should have been. using ddb
! 83: * and en_dumpmem() I verified that the DTQs fed into the card were
! 84: * absolutely correct. thus, we are forced to concluded that the ENI
! 85: * hardware is buggy. note that the Adaptec version of the card works
! 86: * just fine with byte DMA.
! 87: *
! 88: * bottom line: we set EN_ENIDMAFIX to 1 to avoid byte DMAs on the ENI
! 89: * card.
! 90: */
! 91:
! 92: #if defined(DIAGNOSTIC) && !defined(EN_DIAG)
! 93: #define EN_DIAG /* link in with master DIAG option */
! 94: #endif
! 95: #ifdef EN_STAT
! 96: #define EN_COUNT(X) (X)++
! 97: #else
! 98: #define EN_COUNT(X) /* nothing */
! 99: #endif
! 100:
! 101: #ifdef EN_DEBUG
! 102: #undef EN_DDBHOOK
! 103: #define EN_DDBHOOK 1
! 104: #define STATIC /* nothing */
! 105: #define INLINE /* nothing */
! 106: #else /* EN_DEBUG */
! 107: #define STATIC static
! 108: #define INLINE inline
! 109: #endif /* EN_DEBUG */
! 110:
! 111: #include "bpfilter.h"
! 112:
! 113: #ifdef __FreeBSD__
! 114: #include "en.h"
! 115: #endif
! 116:
! 117: #if NEN > 0 || !defined(__FreeBSD__)
! 118:
! 119: #include <sys/param.h>
! 120: #include <sys/systm.h>
! 121: #include <sys/types.h>
! 122: #if defined(__NetBSD__) || defined(__OpenBSD__) || defined(__bsdi__)
! 123: #include <sys/device.h>
! 124: #endif
! 125: #if defined(__FreeBSD__)
! 126: #include <sys/sockio.h>
! 127: #else
! 128: #include <sys/ioctl.h>
! 129: #endif
! 130: #include <sys/mbuf.h>
! 131: #include <sys/socket.h>
! 132: #include <sys/socketvar.h>
! 133:
! 134: #include <net/if.h>
! 135: #include <net/if_atm.h>
! 136:
! 137: #include <uvm/uvm_extern.h>
! 138:
! 139: #ifdef INET
! 140: #include <netinet/if_atm.h>
! 141: #endif
! 142:
! 143: #ifdef NATM
! 144: #include <netinet/in.h>
! 145: #include <netnatm/natm.h>
! 146: #endif
! 147:
! 148:
! 149: #if !defined(__sparc__) && !defined(__FreeBSD__)
! 150: #include <machine/bus.h>
! 151: #endif
! 152:
! 153: #if defined(__NetBSD__) || defined(__OpenBSD__)
! 154: #include <dev/ic/midwayreg.h>
! 155: #include <dev/ic/midwayvar.h>
! 156: #if defined(__alpha__)
! 157: /* XXX XXX NEED REAL DMA MAPPING SUPPORT XXX XXX */
! 158: #undef vtophys
! 159: #define vtophys(va) alpha_XXX_dmamap((vaddr_t)(va))
! 160: #endif
! 161: #elif defined(__FreeBSD__)
! 162: #include <machine/cpufunc.h> /* for rdtsc proto for clock.h below */
! 163: #include <machine/clock.h> /* for DELAY */
! 164: #include <dev/en/midwayreg.h>
! 165: #include <dev/en/midwayvar.h>
! 166: #include <vm/pmap.h> /* for vtophys proto */
! 167:
! 168: /*
! 169: * 2.1.x does not have if_softc. detect this by seeing if IFF_NOTRAILERS
! 170: * is defined, as per kjc.
! 171: */
! 172: #ifdef IFF_NOTRAILERS
! 173: #define MISSING_IF_SOFTC
! 174: #else
! 175: #define IFF_NOTRAILERS 0
! 176: #endif
! 177:
! 178: #endif /* __FreeBSD__ */
! 179:
! 180: #if NBPFILTER > 0
! 181: #include <net/bpf.h>
! 182: #endif
! 183:
! 184: /*
! 185: * params
! 186: */
! 187:
! 188: #ifndef EN_TXHIWAT
! 189: #define EN_TXHIWAT (64*1024) /* max 64 KB waiting to be DMAd out */
! 190: #endif
! 191:
! 192: #ifndef EN_MINDMA
! 193: #define EN_MINDMA 32 /* don't DMA anything less than this (bytes) */
! 194: #endif
! 195:
! 196: #define RX_NONE 0xffff /* recv VC not in use */
! 197:
! 198: #define EN_OBHDR ATM_PH_DRIVER7 /* TBD in first mbuf ! */
! 199: #define EN_OBTRL ATM_PH_DRIVER8 /* PDU trailer in last mbuf ! */
! 200:
! 201: #define ENOTHER_FREE 0x01 /* free rxslot */
! 202: #define ENOTHER_DRAIN 0x02 /* almost free (drain DRQ dma) */
! 203: #define ENOTHER_RAW 0x04 /* 'raw' access (aka boodi mode) */
! 204: #define ENOTHER_SWSL 0x08 /* in software service list */
! 205:
! 206: int en_dma = EN_DMA; /* use DMA (switch off for dbg) */
! 207:
! 208: /*
! 209: * autoconfig attachments
! 210: */
! 211:
! 212: struct cfdriver en_cd = {
! 213: 0, "en", DV_IFNET,
! 214: };
! 215:
! 216: /*
! 217: * local structures
! 218: */
! 219:
! 220: /*
! 221: * params to en_txlaunch() function
! 222: */
! 223:
! 224: struct en_launch {
! 225: u_int32_t tbd1; /* TBD 1 */
! 226: u_int32_t tbd2; /* TBD 2 */
! 227: u_int32_t pdu1; /* PDU 1 (aal5) */
! 228: int nodma; /* don't use DMA */
! 229: int need; /* total space we need (pad out if less data) */
! 230: int mlen; /* length of mbuf (for dtq) */
! 231: struct mbuf *t; /* data */
! 232: u_int32_t aal; /* aal code */
! 233: u_int32_t atm_vci; /* vci */
! 234: u_int8_t atm_flags; /* flags */
! 235: };
! 236:
! 237:
! 238: /*
! 239: * dma table (index by # of words)
! 240: *
! 241: * plan A: use WMAYBE
! 242: * plan B: avoid WMAYBE
! 243: */
! 244:
! 245: struct en_dmatab {
! 246: u_int8_t bcode; /* code */
! 247: u_int8_t divshift; /* byte divisor */
! 248: };
! 249:
! 250: static struct en_dmatab en_dma_planA[] = {
! 251: { 0, 0 }, /* 0 */ { MIDDMA_WORD, 2 }, /* 1 */
! 252: { MIDDMA_2WORD, 3}, /* 2 */ { MIDDMA_4WMAYBE, 2}, /* 3 */
! 253: { MIDDMA_4WORD, 4}, /* 4 */ { MIDDMA_8WMAYBE, 2}, /* 5 */
! 254: { MIDDMA_8WMAYBE, 2}, /* 6 */ { MIDDMA_8WMAYBE, 2}, /* 7 */
! 255: { MIDDMA_8WORD, 5}, /* 8 */ { MIDDMA_16WMAYBE, 2}, /* 9 */
! 256: { MIDDMA_16WMAYBE,2}, /* 10 */ { MIDDMA_16WMAYBE, 2}, /* 11 */
! 257: { MIDDMA_16WMAYBE,2}, /* 12 */ { MIDDMA_16WMAYBE, 2}, /* 13 */
! 258: { MIDDMA_16WMAYBE,2}, /* 14 */ { MIDDMA_16WMAYBE, 2}, /* 15 */
! 259: { MIDDMA_16WORD, 6}, /* 16 */
! 260: };
! 261:
! 262: static struct en_dmatab en_dma_planB[] = {
! 263: { 0, 0 }, /* 0 */ { MIDDMA_WORD, 2}, /* 1 */
! 264: { MIDDMA_2WORD, 3}, /* 2 */ { MIDDMA_WORD, 2}, /* 3 */
! 265: { MIDDMA_4WORD, 4}, /* 4 */ { MIDDMA_WORD, 2}, /* 5 */
! 266: { MIDDMA_2WORD, 3}, /* 6 */ { MIDDMA_WORD, 2}, /* 7 */
! 267: { MIDDMA_8WORD, 5}, /* 8 */ { MIDDMA_WORD, 2}, /* 9 */
! 268: { MIDDMA_2WORD, 3}, /* 10 */ { MIDDMA_WORD, 2}, /* 11 */
! 269: { MIDDMA_4WORD, 4}, /* 12 */ { MIDDMA_WORD, 2}, /* 13 */
! 270: { MIDDMA_2WORD, 3}, /* 14 */ { MIDDMA_WORD, 2}, /* 15 */
! 271: { MIDDMA_16WORD, 6}, /* 16 */
! 272: };
! 273:
! 274: static struct en_dmatab *en_dmaplan = en_dma_planA;
! 275:
! 276: /*
! 277: * prototypes
! 278: */
! 279:
! 280: STATIC INLINE int en_b2sz(int) __attribute__ ((unused));
! 281: #ifdef EN_DDBHOOK
! 282: int en_dump(int,int);
! 283: int en_dumpmem(int,int,int);
! 284: #endif
! 285: STATIC void en_dmaprobe(struct en_softc *);
! 286: STATIC int en_dmaprobe_doit(struct en_softc *, u_int8_t *,
! 287: u_int8_t *, int);
! 288: STATIC INLINE int en_dqneed(struct en_softc *, caddr_t, u_int,
! 289: u_int) __attribute__ ((unused));
! 290: STATIC void en_init(struct en_softc *);
! 291: STATIC int en_ioctl(struct ifnet *, EN_IOCTL_CMDT, caddr_t);
! 292: STATIC INLINE int en_k2sz(int) __attribute__ ((unused));
! 293: STATIC void en_loadvc(struct en_softc *, int);
! 294: STATIC int en_mfix(struct en_softc *, struct mbuf **,
! 295: struct mbuf *);
! 296: STATIC INLINE struct mbuf *en_mget(struct en_softc *, u_int,
! 297: u_int *) __attribute__ ((unused));
! 298: STATIC INLINE u_int32_t en_read(struct en_softc *,
! 299: u_int32_t) __attribute__ ((unused));
! 300: STATIC int en_rxctl(struct en_softc *, struct atm_pseudoioctl *,
! 301: int);
! 302: STATIC void en_txdma(struct en_softc *, int);
! 303: STATIC void en_txlaunch(struct en_softc *, int,
! 304: struct en_launch *);
! 305: STATIC void en_service(struct en_softc *);
! 306: STATIC void en_start(struct ifnet *);
! 307: STATIC INLINE int en_sz2b(int) __attribute__ ((unused));
! 308: STATIC INLINE void en_write(struct en_softc *, u_int32_t,
! 309: u_int32_t) __attribute__ ((unused));
! 310:
! 311: /*
! 312: * macros/inline
! 313: */
! 314:
! 315: /*
! 316: * raw read/write macros
! 317: */
! 318:
! 319: #define EN_READDAT(SC,R) en_read(SC,R)
! 320: #define EN_WRITEDAT(SC,R,V) en_write(SC,R,V)
! 321:
! 322: /*
! 323: * cooked read/write macros
! 324: */
! 325:
! 326: #define EN_READ(SC,R) ntohl(en_read(SC,R))
! 327: #define EN_WRITE(SC,R,V) en_write(SC,R, htonl(V))
! 328:
! 329: #define EN_WRAPADD(START,STOP,CUR,VAL) { \
! 330: (CUR) = (CUR) + (VAL); \
! 331: if ((CUR) >= (STOP)) \
! 332: (CUR) = (START) + ((CUR) - (STOP)); \
! 333: }
! 334:
! 335: #define WORD_IDX(START, X) (((X) - (START)) / sizeof(u_int32_t))
! 336:
! 337: /* we store sc->dtq and sc->drq data in the following format... */
! 338: #define EN_DQ_MK(SLOT,LEN) (((SLOT) << 20)|(LEN)|(0x80000))
! 339: /* the 0x80000 ensures we != 0 */
! 340: #define EN_DQ_SLOT(X) ((X) >> 20)
! 341: #define EN_DQ_LEN(X) ((X) & 0x3ffff)
! 342:
! 343: /* format of DTQ/DRQ word 1 differs between ENI and ADP */
! 344: #if defined(MIDWAY_ENIONLY)
! 345:
! 346: #define MID_MK_TXQ(SC,CNT,CHAN,END,BCODE) \
! 347: EN_WRITE((SC), (SC)->dtq_us, \
! 348: MID_MK_TXQ_ENI((CNT), (CHAN), (END), (BCODE)));
! 349:
! 350: #define MID_MK_RXQ(SC,CNT,VCI,END,BCODE) \
! 351: EN_WRITE((SC), (SC)->drq_us, \
! 352: MID_MK_RXQ_ENI((CNT), (VCI), (END), (BCODE)));
! 353:
! 354: #elif defined(MIDWAY_ADPONLY)
! 355:
! 356: #define MID_MK_TXQ(SC,CNT,CHAN,END,JK) \
! 357: EN_WRITE((SC), (SC)->dtq_us, \
! 358: MID_MK_TXQ_ADP((CNT), (CHAN), (END), (JK)));
! 359:
! 360: #define MID_MK_RXQ(SC,CNT,VCI,END,JK) \
! 361: EN_WRITE((SC), (SC)->drq_us, \
! 362: MID_MK_RXQ_ADP((CNT), (VCI), (END), (JK)));
! 363:
! 364: #else
! 365:
! 366: #define MID_MK_TXQ(SC,CNT,CHAN,END,JK_OR_BCODE) { \
! 367: if ((SC)->is_adaptec) \
! 368: EN_WRITE((SC), (SC)->dtq_us, \
! 369: MID_MK_TXQ_ADP((CNT), (CHAN), (END), (JK_OR_BCODE))); \
! 370: else \
! 371: EN_WRITE((SC), (SC)->dtq_us, \
! 372: MID_MK_TXQ_ENI((CNT), (CHAN), (END), (JK_OR_BCODE))); \
! 373: }
! 374:
! 375: #define MID_MK_RXQ(SC,CNT,VCI,END,JK_OR_BCODE) { \
! 376: if ((SC)->is_adaptec) \
! 377: EN_WRITE((SC), (SC)->drq_us, \
! 378: MID_MK_RXQ_ADP((CNT), (VCI), (END), (JK_OR_BCODE))); \
! 379: else \
! 380: EN_WRITE((SC), (SC)->drq_us, \
! 381: MID_MK_RXQ_ENI((CNT), (VCI), (END), (JK_OR_BCODE))); \
! 382: }
! 383:
! 384: #endif
! 385:
! 386: /* add an item to the DTQ */
! 387: #define EN_DTQADD(SC,CNT,CHAN,JK_OR_BCODE,ADDR,LEN,END) { \
! 388: if (END) \
! 389: (SC)->dtq[MID_DTQ_A2REG((SC)->dtq_us)] = EN_DQ_MK(CHAN,LEN); \
! 390: MID_MK_TXQ(SC,CNT,CHAN,END,JK_OR_BCODE); \
! 391: (SC)->dtq_us += 4; \
! 392: EN_WRITE((SC), (SC)->dtq_us, (ADDR)); \
! 393: EN_WRAPADD(MID_DTQOFF, MID_DTQEND, (SC)->dtq_us, 4); \
! 394: (SC)->dtq_free--; \
! 395: if (END) \
! 396: EN_WRITE((SC), MID_DMA_WRTX, MID_DTQ_A2REG((SC)->dtq_us)); \
! 397: }
! 398:
! 399: /* DRQ add macro */
! 400: #define EN_DRQADD(SC,CNT,VCI,JK_OR_BCODE,ADDR,LEN,SLOT,END) { \
! 401: if (END) \
! 402: (SC)->drq[MID_DRQ_A2REG((SC)->drq_us)] = EN_DQ_MK(SLOT,LEN); \
! 403: MID_MK_RXQ(SC,CNT,VCI,END,JK_OR_BCODE); \
! 404: (SC)->drq_us += 4; \
! 405: EN_WRITE((SC), (SC)->drq_us, (ADDR)); \
! 406: EN_WRAPADD(MID_DRQOFF, MID_DRQEND, (SC)->drq_us, 4); \
! 407: (SC)->drq_free--; \
! 408: if (END) \
! 409: EN_WRITE((SC), MID_DMA_WRRX, MID_DRQ_A2REG((SC)->drq_us)); \
! 410: }
! 411:
! 412: /*
! 413: * the driver code
! 414: *
! 415: * the code is arranged in a specific way:
! 416: * [1] short/inline functions
! 417: * [2] autoconfig stuff
! 418: * [3] ioctl stuff
! 419: * [4] reset -> init -> transmit -> intr -> receive functions
! 420: *
! 421: */
! 422:
! 423: /***********************************************************************/
! 424:
! 425: /*
! 426: * en_read: read a word from the card. this is the only function
! 427: * that reads from the card.
! 428: */
! 429:
! 430: STATIC INLINE u_int32_t en_read(sc, r)
! 431:
! 432: struct en_softc *sc;
! 433: u_int32_t r;
! 434:
! 435: {
! 436:
! 437: #ifdef EN_DEBUG_RANGE
! 438: if (r > MID_MAXOFF || (r % 4)) {
! 439: panic("en_read: out of range, r=0x%x", r);
! 440: }
! 441: #endif
! 442:
! 443: return(bus_space_read_4(sc->en_memt, sc->en_base, r));
! 444: }
! 445:
! 446: /*
! 447: * en_write: write a word to the card. this is the only function that
! 448: * writes to the card.
! 449: */
! 450:
! 451: STATIC INLINE void en_write(sc, r, v)
! 452:
! 453: struct en_softc *sc;
! 454: u_int32_t r, v;
! 455:
! 456: {
! 457: #ifdef EN_DEBUG_RANGE
! 458: if (r > MID_MAXOFF || (r % 4)) {
! 459: panic("en_write: out of range, r=0x%x", r);
! 460: }
! 461: #endif
! 462:
! 463: bus_space_write_4(sc->en_memt, sc->en_base, r, v);
! 464: }
! 465:
! 466: /*
! 467: * en_k2sz: convert KBytes to a size parameter (a log2)
! 468: */
! 469:
! 470: STATIC INLINE int en_k2sz(k)
! 471:
! 472: int k;
! 473:
! 474: {
! 475: switch(k) {
! 476: case 1: return(0);
! 477: case 2: return(1);
! 478: case 4: return(2);
! 479: case 8: return(3);
! 480: case 16: return(4);
! 481: case 32: return(5);
! 482: case 64: return(6);
! 483: case 128: return(7);
! 484: default: panic("en_k2sz");
! 485: }
! 486: return(0);
! 487: }
! 488: #define en_log2(X) en_k2sz(X)
! 489:
! 490:
! 491: /*
! 492: * en_b2sz: convert a DMA burst code to its byte size
! 493: */
! 494:
! 495: STATIC INLINE int en_b2sz(b)
! 496:
! 497: int b;
! 498:
! 499: {
! 500: switch (b) {
! 501: case MIDDMA_WORD: return(1*4);
! 502: case MIDDMA_2WMAYBE:
! 503: case MIDDMA_2WORD: return(2*4);
! 504: case MIDDMA_4WMAYBE:
! 505: case MIDDMA_4WORD: return(4*4);
! 506: case MIDDMA_8WMAYBE:
! 507: case MIDDMA_8WORD: return(8*4);
! 508: case MIDDMA_16WMAYBE:
! 509: case MIDDMA_16WORD: return(16*4);
! 510: default: panic("en_b2sz");
! 511: }
! 512: return(0);
! 513: }
! 514:
! 515:
! 516: /*
! 517: * en_sz2b: convert a burst size (bytes) to DMA burst code
! 518: */
! 519:
! 520: STATIC INLINE int en_sz2b(sz)
! 521:
! 522: int sz;
! 523:
! 524: {
! 525: switch (sz) {
! 526: case 1*4: return(MIDDMA_WORD);
! 527: case 2*4: return(MIDDMA_2WORD);
! 528: case 4*4: return(MIDDMA_4WORD);
! 529: case 8*4: return(MIDDMA_8WORD);
! 530: case 16*4: return(MIDDMA_16WORD);
! 531: default: panic("en_sz2b");
! 532: }
! 533: return(0);
! 534: }
! 535:
! 536:
! 537: /*
! 538: * en_dqneed: calculate number of DTQ/DRQ's needed for a buffer
! 539: */
! 540:
! 541: STATIC INLINE int en_dqneed(sc, data, len, tx)
! 542:
! 543: struct en_softc *sc;
! 544: caddr_t data;
! 545: u_int len, tx;
! 546:
! 547: {
! 548: int result, needalign, sz;
! 549:
! 550: #if !defined(MIDWAY_ENIONLY)
! 551: #if !defined(MIDWAY_ADPONLY)
! 552: if (sc->is_adaptec)
! 553: #endif /* !MIDWAY_ADPONLY */
! 554: return(1); /* adaptec can DMA anything in one go */
! 555: #endif
! 556:
! 557: #if !defined(MIDWAY_ADPONLY)
! 558: result = 0;
! 559: if (len < EN_MINDMA) {
! 560: if (!tx) /* XXX: conservative */
! 561: return(1); /* will copy/DMA_JK */
! 562: }
! 563:
! 564: if (tx) { /* byte burst? */
! 565: needalign = (((unsigned long) data) % sizeof(u_int32_t));
! 566: if (needalign) {
! 567: result++;
! 568: sz = min(len, sizeof(u_int32_t) - needalign);
! 569: len -= sz;
! 570: data += sz;
! 571: }
! 572: }
! 573:
! 574: if (sc->alburst && len) {
! 575: needalign = (((unsigned long) data) & sc->bestburstmask);
! 576: if (needalign) {
! 577: result++; /* alburst */
! 578: sz = min(len, sc->bestburstlen - needalign);
! 579: len -= sz;
! 580: }
! 581: }
! 582:
! 583: if (len >= sc->bestburstlen) {
! 584: sz = len / sc->bestburstlen;
! 585: sz = sz * sc->bestburstlen;
! 586: len -= sz;
! 587: result++; /* best shot */
! 588: }
! 589:
! 590: if (len) {
! 591: result++; /* clean up */
! 592: if (tx && (len % sizeof(u_int32_t)) != 0)
! 593: result++; /* byte cleanup */
! 594: }
! 595:
! 596: return(result);
! 597: #endif /* !MIDWAY_ADPONLY */
! 598: }
! 599:
! 600:
! 601: /*
! 602: * en_mget: get an mbuf chain that can hold totlen bytes and return it
! 603: * (for recv) [based on am7990_get from if_le and ieget from if_ie]
! 604: * after this call the sum of all the m_len's in the chain will be totlen.
! 605: */
! 606:
! 607: STATIC INLINE struct mbuf *en_mget(sc, totlen, drqneed)
! 608:
! 609: struct en_softc *sc;
! 610: u_int totlen, *drqneed;
! 611:
! 612: {
! 613: struct mbuf *m;
! 614: struct mbuf *top, **mp;
! 615: *drqneed = 0;
! 616:
! 617: MGETHDR(m, M_DONTWAIT, MT_DATA);
! 618: if (m == NULL)
! 619: return(NULL);
! 620: m->m_pkthdr.rcvif = &sc->enif;
! 621: m->m_pkthdr.len = totlen;
! 622: m->m_len = MHLEN;
! 623: top = NULL;
! 624: mp = ⊤
! 625:
! 626: /* if (top != NULL) then we've already got 1 mbuf on the chain */
! 627: while (totlen > 0) {
! 628: if (top) {
! 629: MGET(m, M_DONTWAIT, MT_DATA);
! 630: if (!m) {
! 631: m_freem(top);
! 632: return(NULL); /* out of mbufs */
! 633: }
! 634: m->m_len = MLEN;
! 635: }
! 636: if (totlen >= MINCLSIZE) {
! 637: MCLGET(m, M_DONTWAIT);
! 638: if ((m->m_flags & M_EXT) == 0) {
! 639: m_free(m);
! 640: m_freem(top);
! 641: return(NULL); /* out of mbuf clusters */
! 642: }
! 643: m->m_len = MCLBYTES;
! 644: }
! 645: m->m_len = min(totlen, m->m_len);
! 646: totlen -= m->m_len;
! 647: *mp = m;
! 648: mp = &m->m_next;
! 649:
! 650: *drqneed += en_dqneed(sc, m->m_data, m->m_len, 0);
! 651:
! 652: }
! 653: return(top);
! 654: }
! 655:
! 656: /***********************************************************************/
! 657:
! 658: /*
! 659: * autoconfig stuff
! 660: */
! 661:
! 662: void en_attach(sc)
! 663:
! 664: struct en_softc *sc;
! 665:
! 666: {
! 667: struct ifnet *ifp = &sc->enif;
! 668: int sz;
! 669: u_int32_t reg, lcv, check, ptr, sav, midvloc;
! 670:
! 671: /*
! 672: * probe card to determine memory size. the stupid ENI card always
! 673: * reports to PCI that it needs 4MB of space (2MB regs and 2MB RAM).
! 674: * if it has less than 2MB RAM the addresses wrap in the RAM address space.
! 675: * (i.e. on a 512KB card addresses 0x3ffffc, 0x37fffc, and 0x2ffffc
! 676: * are aliases for 0x27fffc [note that RAM starts at offset 0x200000]).
! 677: */
! 678:
! 679: if (sc->en_busreset)
! 680: sc->en_busreset(sc);
! 681: EN_WRITE(sc, MID_RESID, 0x0); /* reset card before touching RAM */
! 682: for (lcv = MID_PROBEOFF; lcv <= MID_MAXOFF ; lcv += MID_PROBSIZE) {
! 683: EN_WRITE(sc, lcv, lcv); /* data[address] = address */
! 684: for (check = MID_PROBEOFF ; check < lcv ; check += MID_PROBSIZE) {
! 685: reg = EN_READ(sc, check);
! 686: if (reg != check) { /* found an alias! */
! 687: goto done_probe; /* and quit */
! 688: }
! 689: }
! 690: }
! 691: done_probe:
! 692: lcv -= MID_PROBSIZE; /* take one step back */
! 693: sc->en_obmemsz = (lcv + 4) - MID_RAMOFF;
! 694:
! 695: /*
! 696: * determine the largest DMA burst supported
! 697: */
! 698:
! 699: en_dmaprobe(sc);
! 700:
! 701: /*
! 702: * "hello world"
! 703: */
! 704:
! 705: if (sc->en_busreset)
! 706: sc->en_busreset(sc);
! 707: EN_WRITE(sc, MID_RESID, 0x0); /* reset */
! 708: for (lcv = MID_RAMOFF ; lcv < MID_RAMOFF + sc->en_obmemsz ; lcv += 4)
! 709: EN_WRITE(sc, lcv, 0); /* zero memory */
! 710:
! 711: reg = EN_READ(sc, MID_RESID);
! 712:
! 713: printf("%s: ATM midway v%d, board IDs %d.%d, %s%s%s, %ldKB on-board RAM\n",
! 714: sc->sc_dev.dv_xname, MID_VER(reg), MID_MID(reg), MID_DID(reg),
! 715: (MID_IS_SABRE(reg)) ? "sabre controller, " : "",
! 716: (MID_IS_SUNI(reg)) ? "SUNI" : "Utopia",
! 717: (!MID_IS_SUNI(reg) && MID_IS_UPIPE(reg)) ? " (pipelined)" : "",
! 718: sc->en_obmemsz / 1024);
! 719:
! 720: if (sc->is_adaptec) {
! 721: if (sc->bestburstlen == 64 && sc->alburst == 0)
! 722: printf("%s: passed 64 byte DMA test\n", sc->sc_dev.dv_xname);
! 723: else
! 724: printf("%s: FAILED DMA TEST: burst=%d, alburst=%d\n",
! 725: sc->sc_dev.dv_xname, sc->bestburstlen, sc->alburst);
! 726: } else {
! 727: printf("%s: maximum DMA burst length = %d bytes%s\n", sc->sc_dev.dv_xname,
! 728: sc->bestburstlen, (sc->alburst) ? " (must align)" : "");
! 729: }
! 730:
! 731: #if 0 /* WMAYBE doesn't work, don't complain about it */
! 732: /* check if en_dmaprobe disabled wmaybe */
! 733: if (en_dmaplan == en_dma_planB)
! 734: printf("%s: note: WMAYBE DMA has been disabled\n", sc->sc_dev.dv_xname);
! 735: #endif
! 736:
! 737: /*
! 738: * link into network subsystem and prepare card
! 739: */
! 740:
! 741: #if defined(__NetBSD__) || defined(__OpenBSD__)
! 742: bcopy(sc->sc_dev.dv_xname, sc->enif.if_xname, IFNAMSIZ);
! 743: #endif
! 744: #if !defined(MISSING_IF_SOFTC)
! 745: sc->enif.if_softc = sc;
! 746: #endif
! 747: ifp->if_flags = IFF_SIMPLEX|IFF_NOTRAILERS;
! 748: ifp->if_ioctl = en_ioctl;
! 749: ifp->if_start = en_start;
! 750: IFQ_SET_READY(&ifp->if_snd);
! 751:
! 752: /*
! 753: * init softc
! 754: */
! 755:
! 756: for (lcv = 0 ; lcv < MID_N_VC ; lcv++) {
! 757: sc->rxvc2slot[lcv] = RX_NONE;
! 758: sc->txspeed[lcv] = 0; /* full */
! 759: sc->txvc2slot[lcv] = 0; /* full speed == slot 0 */
! 760: }
! 761:
! 762: sz = sc->en_obmemsz - (MID_BUFOFF - MID_RAMOFF);
! 763: ptr = sav = MID_BUFOFF;
! 764: ptr = roundup(ptr, EN_TXSZ * 1024); /* align */
! 765: sz = sz - (ptr - sav);
! 766: if (EN_TXSZ*1024 * EN_NTX > sz) {
! 767: printf("%s: EN_NTX/EN_TXSZ too big\n", sc->sc_dev.dv_xname);
! 768: return;
! 769: }
! 770: for (lcv = 0 ; lcv < EN_NTX ; lcv++) {
! 771: sc->txslot[lcv].mbsize = 0;
! 772: sc->txslot[lcv].start = ptr;
! 773: ptr += (EN_TXSZ * 1024);
! 774: sz -= (EN_TXSZ * 1024);
! 775: sc->txslot[lcv].stop = ptr;
! 776: sc->txslot[lcv].nref = 0;
! 777: bzero(&sc->txslot[lcv].indma, sizeof(sc->txslot[lcv].indma));
! 778: bzero(&sc->txslot[lcv].q, sizeof(sc->txslot[lcv].q));
! 779: #ifdef EN_DEBUG
! 780: printf("%s: tx%d: start 0x%x, stop 0x%x\n", sc->sc_dev.dv_xname, lcv,
! 781: sc->txslot[lcv].start, sc->txslot[lcv].stop);
! 782: #endif
! 783: }
! 784:
! 785: sav = ptr;
! 786: ptr = roundup(ptr, EN_RXSZ * 1024); /* align */
! 787: sz = sz - (ptr - sav);
! 788: sc->en_nrx = sz / (EN_RXSZ * 1024);
! 789: if (sc->en_nrx <= 0) {
! 790: printf("%s: EN_NTX/EN_TXSZ/EN_RXSZ too big\n", sc->sc_dev.dv_xname);
! 791: return;
! 792: }
! 793:
! 794: /*
! 795: * ensure that there is always one VC slot on the service list free
! 796: * so that we can tell the difference between a full and empty list.
! 797: */
! 798: if (sc->en_nrx >= MID_N_VC)
! 799: sc->en_nrx = MID_N_VC - 1;
! 800:
! 801: for (lcv = 0 ; lcv < sc->en_nrx ; lcv++) {
! 802: sc->rxslot[lcv].rxhand = NULL;
! 803: sc->rxslot[lcv].oth_flags = ENOTHER_FREE;
! 804: bzero(&sc->rxslot[lcv].indma, sizeof(sc->rxslot[lcv].indma));
! 805: bzero(&sc->rxslot[lcv].q, sizeof(sc->rxslot[lcv].q));
! 806: midvloc = sc->rxslot[lcv].start = ptr;
! 807: ptr += (EN_RXSZ * 1024);
! 808: sz -= (EN_RXSZ * 1024);
! 809: sc->rxslot[lcv].stop = ptr;
! 810: midvloc = midvloc - MID_RAMOFF;
! 811: midvloc = (midvloc & ~((EN_RXSZ*1024) - 1)) >> 2; /* mask, cvt to words */
! 812: midvloc = midvloc >> MIDV_LOCTOPSHFT; /* we only want the top 11 bits */
! 813: midvloc = (midvloc & MIDV_LOCMASK) << MIDV_LOCSHIFT;
! 814: sc->rxslot[lcv].mode = midvloc |
! 815: (en_k2sz(EN_RXSZ) << MIDV_SZSHIFT) | MIDV_TRASH;
! 816:
! 817: #ifdef EN_DEBUG
! 818: printf("%s: rx%d: start 0x%x, stop 0x%x, mode 0x%x\n", sc->sc_dev.dv_xname,
! 819: lcv, sc->rxslot[lcv].start, sc->rxslot[lcv].stop, sc->rxslot[lcv].mode);
! 820: #endif
! 821: }
! 822:
! 823: #ifdef EN_STAT
! 824: sc->vtrash = sc->otrash = sc->mfix = sc->txmbovr = sc->dmaovr = 0;
! 825: sc->txoutspace = sc->txdtqout = sc->launch = sc->lheader = sc->ltail = 0;
! 826: sc->hwpull = sc->swadd = sc->rxqnotus = sc->rxqus = sc->rxoutboth = 0;
! 827: sc->rxdrqout = sc->ttrash = sc->rxmbufout = sc->mfixfail = 0;
! 828: sc->headbyte = sc->tailbyte = sc->tailflush = 0;
! 829: #endif
! 830: sc->need_drqs = sc->need_dtqs = 0;
! 831:
! 832: printf("%s: %d %dKB receive buffers, %d %dKB transmit buffers allocated\n",
! 833: sc->sc_dev.dv_xname, sc->en_nrx, EN_RXSZ, EN_NTX, EN_TXSZ);
! 834:
! 835: /*
! 836: * final commit
! 837: */
! 838:
! 839: if_attach(ifp);
! 840: atm_ifattach(ifp);
! 841:
! 842:
! 843: #if NBPFILTER > 0
! 844: bpfattach(&ifp->if_bpf, ifp, DLT_ATM_RFC1483, sizeof(struct atmllc));
! 845: #endif
! 846:
! 847: }
! 848:
! 849:
! 850: /*
! 851: * en_dmaprobe: helper function for en_attach.
! 852: *
! 853: * see how the card handles DMA by running a few DMA tests. we need
! 854: * to figure out the largest number of bytes we can DMA in one burst
! 855: * ("bestburstlen"), and if the starting address for a burst needs to
! 856: * be aligned on any sort of boundary or not ("alburst").
! 857: *
! 858: * typical findings:
! 859: * sparc1: bestburstlen=4, alburst=0 (ick, broken DMA!)
! 860: * sparc2: bestburstlen=64, alburst=1
! 861: * p166: bestburstlen=64, alburst=0
! 862: */
! 863:
! 864: STATIC void en_dmaprobe(sc)
! 865:
! 866: struct en_softc *sc;
! 867:
! 868: {
! 869: u_int32_t srcbuf[64], dstbuf[64];
! 870: u_int8_t *sp, *dp;
! 871: int bestalgn, bestnotalgn, lcv, try, fail;
! 872:
! 873: sc->alburst = 0;
! 874:
! 875: sp = (u_int8_t *) srcbuf;
! 876: while ((((unsigned long) sp) % MIDDMA_MAXBURST) != 0)
! 877: sp += 4;
! 878: dp = (u_int8_t *) dstbuf;
! 879: while ((((unsigned long) dp) % MIDDMA_MAXBURST) != 0)
! 880: dp += 4;
! 881:
! 882: bestalgn = bestnotalgn = en_dmaprobe_doit(sc, sp, dp, 0);
! 883:
! 884: for (lcv = 4 ; lcv < MIDDMA_MAXBURST ; lcv += 4) {
! 885: try = en_dmaprobe_doit(sc, sp+lcv, dp+lcv, 0);
! 886: if (try < bestnotalgn)
! 887: bestnotalgn = try;
! 888: }
! 889:
! 890: if (bestalgn != bestnotalgn) /* need bursts aligned */
! 891: sc->alburst = 1;
! 892:
! 893: sc->bestburstlen = bestalgn;
! 894: sc->bestburstshift = en_log2(bestalgn);
! 895: sc->bestburstmask = sc->bestburstlen - 1; /* must be power of 2 */
! 896: sc->bestburstcode = en_sz2b(bestalgn);
! 897:
! 898: if (sc->bestburstlen <= 2*sizeof(u_int32_t))
! 899: return; /* won't be using WMAYBE */
! 900:
! 901: /*
! 902: * adaptec does not have (or need) wmaybe. do not bother testing
! 903: * for it.
! 904: */
! 905: if (sc->is_adaptec) {
! 906: /* XXX, actually don't need a DMA plan: adaptec is smarter than that */
! 907: en_dmaplan = en_dma_planB;
! 908: return;
! 909: }
! 910:
! 911: /*
! 912: * test that WMAYBE dma works like we think it should
! 913: * (i.e. no alignment restrictions on host address other than alburst)
! 914: */
! 915:
! 916: try = sc->bestburstlen - 4;
! 917: fail = 0;
! 918: fail += en_dmaprobe_doit(sc, sp, dp, try);
! 919: for (lcv = 4 ; lcv < sc->bestburstlen ; lcv += 4) {
! 920: fail += en_dmaprobe_doit(sc, sp+lcv, dp+lcv, try);
! 921: if (sc->alburst)
! 922: try -= 4;
! 923: }
! 924: if (EN_NOWMAYBE || fail) {
! 925: if (fail)
! 926: printf("%s: WARNING: WMAYBE DMA test failed %d time(s)\n",
! 927: sc->sc_dev.dv_xname, fail);
! 928: en_dmaplan = en_dma_planB; /* fall back to plan B */
! 929: }
! 930:
! 931: }
! 932:
! 933:
! 934: /*
! 935: * en_dmaprobe_doit: do actual testing
! 936: */
! 937:
! 938: int
! 939: en_dmaprobe_doit(sc, sp, dp, wmtry)
! 940:
! 941: struct en_softc *sc;
! 942: u_int8_t *sp, *dp;
! 943: int wmtry;
! 944:
! 945: {
! 946: int lcv, retval = 4, cnt, count;
! 947: u_int32_t reg, bcode, midvloc;
! 948:
! 949: /*
! 950: * set up a 1k buffer at MID_BUFOFF
! 951: */
! 952:
! 953: if (sc->en_busreset)
! 954: sc->en_busreset(sc);
! 955: EN_WRITE(sc, MID_RESID, 0x0); /* reset card before touching RAM */
! 956:
! 957: midvloc = ((MID_BUFOFF - MID_RAMOFF) / sizeof(u_int32_t)) >> MIDV_LOCTOPSHFT;
! 958: EN_WRITE(sc, MIDX_PLACE(0), MIDX_MKPLACE(en_k2sz(1), midvloc));
! 959: EN_WRITE(sc, MID_VC(0), (midvloc << MIDV_LOCSHIFT)
! 960: | (en_k2sz(1) << MIDV_SZSHIFT) | MIDV_TRASH);
! 961: EN_WRITE(sc, MID_DST_RP(0), 0);
! 962: EN_WRITE(sc, MID_WP_ST_CNT(0), 0);
! 963:
! 964: for (lcv = 0 ; lcv < 68 ; lcv++) /* set up sample data */
! 965: sp[lcv] = lcv+1;
! 966: EN_WRITE(sc, MID_MAST_CSR, MID_MCSR_ENDMA); /* enable DMA (only) */
! 967:
! 968: sc->drq_chip = MID_DRQ_REG2A(EN_READ(sc, MID_DMA_RDRX));
! 969: sc->dtq_chip = MID_DTQ_REG2A(EN_READ(sc, MID_DMA_RDTX));
! 970:
! 971: /*
! 972: * try it now . . . DMA it out, then DMA it back in and compare
! 973: *
! 974: * note: in order to get the dma stuff to reverse directions it wants
! 975: * the "end" flag set! since we are not dma'ing valid data we may
! 976: * get an ident mismatch interrupt (which we will ignore).
! 977: *
! 978: * note: we've got two different tests rolled up in the same loop
! 979: * if (wmtry)
! 980: * then we are doing a wmaybe test and wmtry is a byte count
! 981: * else we are doing a burst test
! 982: */
! 983:
! 984: for (lcv = 8 ; lcv <= MIDDMA_MAXBURST ; lcv = lcv * 2) {
! 985:
! 986: /* zero SRAM and dest buffer */
! 987: for (cnt = 0 ; cnt < 1024; cnt += 4)
! 988: EN_WRITE(sc, MID_BUFOFF+cnt, 0); /* zero memory */
! 989: for (cnt = 0 ; cnt < 68 ; cnt++)
! 990: dp[cnt] = 0;
! 991:
! 992: if (wmtry) {
! 993: count = (sc->bestburstlen - sizeof(u_int32_t)) / sizeof(u_int32_t);
! 994: bcode = en_dmaplan[count].bcode;
! 995: count = wmtry >> en_dmaplan[count].divshift;
! 996: } else {
! 997: bcode = en_sz2b(lcv);
! 998: count = 1;
! 999: }
! 1000: if (sc->is_adaptec)
! 1001: EN_WRITE(sc, sc->dtq_chip, MID_MK_TXQ_ADP(lcv, 0, MID_DMA_END, 0));
! 1002: else
! 1003: EN_WRITE(sc, sc->dtq_chip, MID_MK_TXQ_ENI(count, 0, MID_DMA_END, bcode));
! 1004: EN_WRITE(sc, sc->dtq_chip+4, vtophys(sp));
! 1005: EN_WRITE(sc, MID_DMA_WRTX, MID_DTQ_A2REG(sc->dtq_chip+8));
! 1006: cnt = 1000;
! 1007: while (EN_READ(sc, MID_DMA_RDTX) == MID_DTQ_A2REG(sc->dtq_chip)) {
! 1008: DELAY(1);
! 1009: cnt--;
! 1010: if (cnt == 0) {
! 1011: printf("%s: unexpected timeout in tx DMA test\n", sc->sc_dev.dv_xname);
! 1012: return(retval); /* timeout, give up */
! 1013: }
! 1014: }
! 1015: EN_WRAPADD(MID_DTQOFF, MID_DTQEND, sc->dtq_chip, 8);
! 1016: reg = EN_READ(sc, MID_INTACK);
! 1017: if ((reg & MID_INT_DMA_TX) != MID_INT_DMA_TX) {
! 1018: printf("%s: unexpected status in tx DMA test: 0x%x\n",
! 1019: sc->sc_dev.dv_xname, reg);
! 1020: return(retval);
! 1021: }
! 1022: EN_WRITE(sc, MID_MAST_CSR, MID_MCSR_ENDMA); /* re-enable DMA (only) */
! 1023:
! 1024: /* "return to sender..." address is known ... */
! 1025:
! 1026: if (sc->is_adaptec)
! 1027: EN_WRITE(sc, sc->drq_chip, MID_MK_RXQ_ADP(lcv, 0, MID_DMA_END, 0));
! 1028: else
! 1029: EN_WRITE(sc, sc->drq_chip, MID_MK_RXQ_ENI(count, 0, MID_DMA_END, bcode));
! 1030: EN_WRITE(sc, sc->drq_chip+4, vtophys(dp));
! 1031: EN_WRITE(sc, MID_DMA_WRRX, MID_DRQ_A2REG(sc->drq_chip+8));
! 1032: cnt = 1000;
! 1033: while (EN_READ(sc, MID_DMA_RDRX) == MID_DRQ_A2REG(sc->drq_chip)) {
! 1034: DELAY(1);
! 1035: cnt--;
! 1036: if (cnt == 0) {
! 1037: printf("%s: unexpected timeout in rx DMA test\n", sc->sc_dev.dv_xname);
! 1038: return(retval); /* timeout, give up */
! 1039: }
! 1040: }
! 1041: EN_WRAPADD(MID_DRQOFF, MID_DRQEND, sc->drq_chip, 8);
! 1042: reg = EN_READ(sc, MID_INTACK);
! 1043: if ((reg & MID_INT_DMA_RX) != MID_INT_DMA_RX) {
! 1044: printf("%s: unexpected status in rx DMA test: 0x%x\n",
! 1045: sc->sc_dev.dv_xname, reg);
! 1046: return(retval);
! 1047: }
! 1048: EN_WRITE(sc, MID_MAST_CSR, MID_MCSR_ENDMA); /* re-enable DMA (only) */
! 1049:
! 1050: if (wmtry) {
! 1051: return(bcmp(sp, dp, wmtry)); /* wmtry always exits here, no looping */
! 1052: }
! 1053:
! 1054: if (bcmp(sp, dp, lcv))
! 1055: return(retval); /* failed, use last value */
! 1056:
! 1057: retval = lcv;
! 1058:
! 1059: }
! 1060: return(retval); /* studly 64 byte DMA present! oh baby!! */
! 1061: }
! 1062:
! 1063: /***********************************************************************/
! 1064:
! 1065: /*
! 1066: * en_ioctl: handle ioctl requests
! 1067: *
! 1068: * NOTE: if you add an ioctl to set txspeed, you should choose a new
! 1069: * TX channel/slot. Choose the one with the lowest sc->txslot[slot].nref
! 1070: * value, subtract one from sc->txslot[0].nref, add one to the
! 1071: * sc->txslot[slot].nref, set sc->txvc2slot[vci] = slot, and then set
! 1072: * txspeed[vci].
! 1073: */
! 1074:
! 1075: STATIC int en_ioctl(ifp, cmd, data)
! 1076:
! 1077: struct ifnet *ifp;
! 1078: EN_IOCTL_CMDT cmd;
! 1079: caddr_t data;
! 1080:
! 1081: {
! 1082: #ifdef MISSING_IF_SOFTC
! 1083: struct en_softc *sc = (struct en_softc *) en_cd.cd_devs[ifp->if_unit];
! 1084: #else
! 1085: struct en_softc *sc = (struct en_softc *) ifp->if_softc;
! 1086: #endif
! 1087: struct ifaddr *ifa = (struct ifaddr *) data;
! 1088: struct ifreq *ifr = (struct ifreq *) data;
! 1089: struct atm_pseudoioctl *api = (struct atm_pseudoioctl *)data;
! 1090: #ifdef NATM
! 1091: struct atm_rawioctl *ario = (struct atm_rawioctl *)data;
! 1092: int slot;
! 1093: #endif
! 1094: int s, error = 0;
! 1095:
! 1096: s = splnet();
! 1097:
! 1098: switch (cmd) {
! 1099: case SIOCATMENA: /* enable circuit for recv */
! 1100: error = en_rxctl(sc, api, 1);
! 1101: break;
! 1102:
! 1103: case SIOCATMDIS: /* disable circuit for recv */
! 1104: error = en_rxctl(sc, api, 0);
! 1105: break;
! 1106:
! 1107: #ifdef NATM
! 1108: case SIOCXRAWATM:
! 1109: if ((slot = sc->rxvc2slot[ario->npcb->npcb_vci]) == RX_NONE) {
! 1110: error = EINVAL;
! 1111: break;
! 1112: }
! 1113: if (ario->rawvalue > EN_RXSZ*1024)
! 1114: ario->rawvalue = EN_RXSZ*1024;
! 1115: if (ario->rawvalue) {
! 1116: sc->rxslot[slot].oth_flags |= ENOTHER_RAW;
! 1117: sc->rxslot[slot].raw_threshold = ario->rawvalue;
! 1118: } else {
! 1119: sc->rxslot[slot].oth_flags &= (~ENOTHER_RAW);
! 1120: sc->rxslot[slot].raw_threshold = 0;
! 1121: }
! 1122: #ifdef EN_DEBUG
! 1123: printf("%s: rxvci%d: turn %s raw (boodi) mode\n",
! 1124: sc->sc_dev.dv_xname, ario->npcb->npcb_vci,
! 1125: (ario->rawvalue) ? "on" : "off");
! 1126: #endif
! 1127: break;
! 1128: #endif
! 1129: case SIOCSIFADDR:
! 1130: ifp->if_flags |= IFF_UP;
! 1131: #ifdef INET
! 1132: if (ifa->ifa_addr->sa_family == AF_INET) {
! 1133: en_reset(sc);
! 1134: en_init(sc);
! 1135: ifa->ifa_rtrequest = atm_rtrequest; /* ??? */
! 1136: break;
! 1137: }
! 1138: #endif /* INET */
! 1139: /* what to do if not INET? */
! 1140: en_reset(sc);
! 1141: en_init(sc);
! 1142: break;
! 1143:
! 1144: case SIOCGIFADDR:
! 1145: error = EINVAL;
! 1146: break;
! 1147:
! 1148: case SIOCSIFFLAGS:
! 1149: error = EINVAL;
! 1150: break;
! 1151:
! 1152: case SIOCSIFMTU:
! 1153: /*
! 1154: * Set the interface MTU.
! 1155: */
! 1156: #ifdef notsure
! 1157: if (ifr->ifr_mtu > ATMMTU) {
! 1158: error = EINVAL;
! 1159: break;
! 1160: }
! 1161: #endif
! 1162: ifp->if_mtu = ifr->ifr_mtu;
! 1163: /* XXXCDC: do we really need to reset on MTU size change? */
! 1164: en_reset(sc);
! 1165: en_init(sc);
! 1166: break;
! 1167:
! 1168: default:
! 1169: error = EINVAL;
! 1170: break;
! 1171: }
! 1172: splx(s);
! 1173: return error;
! 1174: }
! 1175:
! 1176:
! 1177: /*
! 1178: * en_rxctl: turn on and off VCs for recv.
! 1179: */
! 1180:
! 1181: STATIC int en_rxctl(sc, pi, on)
! 1182:
! 1183: struct en_softc *sc;
! 1184: struct atm_pseudoioctl *pi;
! 1185: int on;
! 1186:
! 1187: {
! 1188: u_int s, vci, flags, slot;
! 1189: u_int32_t oldmode, newmode;
! 1190:
! 1191: vci = ATM_PH_VCI(&pi->aph);
! 1192: flags = ATM_PH_FLAGS(&pi->aph);
! 1193:
! 1194: #ifdef EN_DEBUG
! 1195: printf("%s: %s vpi=%d, vci=%d, flags=%d\n", sc->sc_dev.dv_xname,
! 1196: (on) ? "enable" : "disable", ATM_PH_VPI(&pi->aph), vci, flags);
! 1197: #endif
! 1198:
! 1199: if (ATM_PH_VPI(&pi->aph) || vci >= MID_N_VC)
! 1200: return(EINVAL);
! 1201:
! 1202: /*
! 1203: * turn on VCI!
! 1204: */
! 1205:
! 1206: if (on) {
! 1207: if (sc->rxvc2slot[vci] != RX_NONE)
! 1208: return(EINVAL);
! 1209: for (slot = 0 ; slot < sc->en_nrx ; slot++)
! 1210: if (sc->rxslot[slot].oth_flags & ENOTHER_FREE)
! 1211: break;
! 1212: if (slot == sc->en_nrx)
! 1213: return(ENOSPC);
! 1214: sc->rxvc2slot[vci] = slot;
! 1215: sc->rxslot[slot].rxhand = NULL;
! 1216: oldmode = sc->rxslot[slot].mode;
! 1217: newmode = (flags & ATM_PH_AAL5) ? MIDV_AAL5 : MIDV_NOAAL;
! 1218: sc->rxslot[slot].mode = MIDV_SETMODE(oldmode, newmode);
! 1219: sc->rxslot[slot].atm_vci = vci;
! 1220: sc->rxslot[slot].atm_flags = flags;
! 1221: sc->rxslot[slot].oth_flags = 0;
! 1222: sc->rxslot[slot].rxhand = pi->rxhand;
! 1223: if (sc->rxslot[slot].indma.ifq_head || sc->rxslot[slot].q.ifq_head)
! 1224: panic("en_rxctl: left over mbufs on enable");
! 1225: sc->txspeed[vci] = 0; /* full speed to start */
! 1226: sc->txvc2slot[vci] = 0; /* init value */
! 1227: sc->txslot[0].nref++; /* bump reference count */
! 1228: en_loadvc(sc, vci); /* does debug printf for us */
! 1229: return(0);
! 1230: }
! 1231:
! 1232: /*
! 1233: * turn off VCI
! 1234: */
! 1235:
! 1236: if (sc->rxvc2slot[vci] == RX_NONE)
! 1237: return(EINVAL);
! 1238: slot = sc->rxvc2slot[vci];
! 1239: if ((sc->rxslot[slot].oth_flags & (ENOTHER_FREE|ENOTHER_DRAIN)) != 0)
! 1240: return(EINVAL);
! 1241: s = splnet(); /* block out enintr() */
! 1242: oldmode = EN_READ(sc, MID_VC(vci));
! 1243: newmode = MIDV_SETMODE(oldmode, MIDV_TRASH) & ~MIDV_INSERVICE;
! 1244: EN_WRITE(sc, MID_VC(vci), (newmode | (oldmode & MIDV_INSERVICE)));
! 1245: /* halt in tracks, be careful to preserve inserivce bit */
! 1246: DELAY(27);
! 1247: sc->rxslot[slot].rxhand = NULL;
! 1248: sc->rxslot[slot].mode = newmode;
! 1249:
! 1250: sc->txslot[sc->txvc2slot[vci]].nref--;
! 1251: sc->txspeed[vci] = 0;
! 1252: sc->txvc2slot[vci] = 0;
! 1253:
! 1254: /* if stuff is still going on we are going to have to drain it out */
! 1255: if (sc->rxslot[slot].indma.ifq_head ||
! 1256: sc->rxslot[slot].q.ifq_head ||
! 1257: (sc->rxslot[slot].oth_flags & ENOTHER_SWSL) != 0) {
! 1258: sc->rxslot[slot].oth_flags |= ENOTHER_DRAIN;
! 1259: } else {
! 1260: sc->rxslot[slot].oth_flags = ENOTHER_FREE;
! 1261: sc->rxslot[slot].atm_vci = RX_NONE;
! 1262: sc->rxvc2slot[vci] = RX_NONE;
! 1263: }
! 1264: splx(s); /* enable enintr() */
! 1265: #ifdef EN_DEBUG
! 1266: printf("%s: rx%d: VCI %d is now %s\n", sc->sc_dev.dv_xname, slot, vci,
! 1267: (sc->rxslot[slot].oth_flags & ENOTHER_DRAIN) ? "draining" : "free");
! 1268: #endif
! 1269: return(0);
! 1270: }
! 1271:
! 1272: /***********************************************************************/
! 1273:
! 1274: /*
! 1275: * en_reset: reset the board, throw away work in progress.
! 1276: * must en_init to recover.
! 1277: */
! 1278:
! 1279: void en_reset(sc)
! 1280:
! 1281: struct en_softc *sc;
! 1282:
! 1283: {
! 1284: struct mbuf *m;
! 1285: int lcv, slot;
! 1286:
! 1287: #ifdef EN_DEBUG
! 1288: printf("%s: reset\n", sc->sc_dev.dv_xname);
! 1289: #endif
! 1290:
! 1291: if (sc->en_busreset)
! 1292: sc->en_busreset(sc);
! 1293: EN_WRITE(sc, MID_RESID, 0x0); /* reset hardware */
! 1294:
! 1295: /*
! 1296: * recv: dump any mbufs we are dma'ing into, if DRAINing, then a reset
! 1297: * will free us!
! 1298: */
! 1299:
! 1300: for (lcv = 0 ; lcv < MID_N_VC ; lcv++) {
! 1301: if (sc->rxvc2slot[lcv] == RX_NONE)
! 1302: continue;
! 1303: slot = sc->rxvc2slot[lcv];
! 1304: while (1) {
! 1305: IF_DEQUEUE(&sc->rxslot[slot].indma, m);
! 1306: if (m == NULL)
! 1307: break; /* >>> exit 'while(1)' here <<< */
! 1308: m_freem(m);
! 1309: }
! 1310: while (1) {
! 1311: IF_DEQUEUE(&sc->rxslot[slot].q, m);
! 1312: if (m == NULL)
! 1313: break; /* >>> exit 'while(1)' here <<< */
! 1314: m_freem(m);
! 1315: }
! 1316: sc->rxslot[slot].oth_flags &= ~ENOTHER_SWSL;
! 1317: if (sc->rxslot[slot].oth_flags & ENOTHER_DRAIN) {
! 1318: sc->rxslot[slot].oth_flags = ENOTHER_FREE;
! 1319: sc->rxvc2slot[lcv] = RX_NONE;
! 1320: #ifdef EN_DEBUG
! 1321: printf("%s: rx%d: VCI %d is now free\n", sc->sc_dev.dv_xname, slot, lcv);
! 1322: #endif
! 1323: }
! 1324: }
! 1325:
! 1326: /*
! 1327: * xmit: dump everything
! 1328: */
! 1329:
! 1330: for (lcv = 0 ; lcv < EN_NTX ; lcv++) {
! 1331: while (1) {
! 1332: IF_DEQUEUE(&sc->txslot[lcv].indma, m);
! 1333: if (m == NULL)
! 1334: break; /* >>> exit 'while(1)' here <<< */
! 1335: m_freem(m);
! 1336: }
! 1337: while (1) {
! 1338: IF_DEQUEUE(&sc->txslot[lcv].q, m);
! 1339: if (m == NULL)
! 1340: break; /* >>> exit 'while(1)' here <<< */
! 1341: m_freem(m);
! 1342: }
! 1343: sc->txslot[lcv].mbsize = 0;
! 1344: }
! 1345:
! 1346: return;
! 1347: }
! 1348:
! 1349:
! 1350: /*
! 1351: * en_init: init board and sync the card with the data in the softc.
! 1352: */
! 1353:
! 1354: STATIC void en_init(sc)
! 1355:
! 1356: struct en_softc *sc;
! 1357:
! 1358: {
! 1359: int vc, slot;
! 1360: u_int32_t loc;
! 1361:
! 1362: if ((sc->enif.if_flags & IFF_UP) == 0) {
! 1363: #ifdef EN_DEBUG
! 1364: printf("%s: going down\n", sc->sc_dev.dv_xname);
! 1365: #endif
! 1366: en_reset(sc); /* to be safe */
! 1367: sc->enif.if_flags &= ~IFF_RUNNING; /* disable */
! 1368: return;
! 1369: }
! 1370:
! 1371: #ifdef EN_DEBUG
! 1372: printf("%s: going up\n", sc->sc_dev.dv_xname);
! 1373: #endif
! 1374: sc->enif.if_flags |= IFF_RUNNING; /* enable */
! 1375:
! 1376: if (sc->en_busreset)
! 1377: sc->en_busreset(sc);
! 1378: EN_WRITE(sc, MID_RESID, 0x0); /* reset */
! 1379:
! 1380: /*
! 1381: * init obmem data structures: vc tab, dma q's, slist.
! 1382: *
! 1383: * note that we set drq_free/dtq_free to one less than the total number
! 1384: * of DTQ/DRQs present. we do this because the card uses the condition
! 1385: * (drq_chip == drq_us) to mean "list is empty"... but if you allow the
! 1386: * circular list to be completely full then (drq_chip == drq_us) [i.e.
! 1387: * the drq_us pointer will wrap all the way around]. by restricting
! 1388: * the number of active requests to (N - 1) we prevent the list from
! 1389: * becoming completely full. note that the card will sometimes give
! 1390: * us an interrupt for a DTQ/DRQ we have already processes... this helps
! 1391: * keep that interrupt from messing us up.
! 1392: */
! 1393:
! 1394: for (vc = 0 ; vc < MID_N_VC ; vc++)
! 1395: en_loadvc(sc, vc);
! 1396:
! 1397: bzero(&sc->drq, sizeof(sc->drq));
! 1398: sc->drq_free = MID_DRQ_N - 1; /* N - 1 */
! 1399: sc->drq_chip = MID_DRQ_REG2A(EN_READ(sc, MID_DMA_RDRX));
! 1400: EN_WRITE(sc, MID_DMA_WRRX, MID_DRQ_A2REG(sc->drq_chip));
! 1401: /* ensure zero queue */
! 1402: sc->drq_us = sc->drq_chip;
! 1403:
! 1404: bzero(&sc->dtq, sizeof(sc->dtq));
! 1405: sc->dtq_free = MID_DTQ_N - 1; /* N - 1 */
! 1406: sc->dtq_chip = MID_DTQ_REG2A(EN_READ(sc, MID_DMA_RDTX));
! 1407: EN_WRITE(sc, MID_DMA_WRTX, MID_DRQ_A2REG(sc->dtq_chip));
! 1408: /* ensure zero queue */
! 1409: sc->dtq_us = sc->dtq_chip;
! 1410:
! 1411: sc->hwslistp = MID_SL_REG2A(EN_READ(sc, MID_SERV_WRITE));
! 1412: sc->swsl_size = sc->swsl_head = sc->swsl_tail = 0;
! 1413:
! 1414: #ifdef EN_DEBUG
! 1415: printf("%s: drq free/chip: %d/0x%x, dtq free/chip: %d/0x%x, hwslist: 0x%x\n",
! 1416: sc->sc_dev.dv_xname, sc->drq_free, sc->drq_chip,
! 1417: sc->dtq_free, sc->dtq_chip, sc->hwslistp);
! 1418: #endif
! 1419:
! 1420: for (slot = 0 ; slot < EN_NTX ; slot++) {
! 1421: sc->txslot[slot].bfree = EN_TXSZ * 1024;
! 1422: EN_WRITE(sc, MIDX_READPTR(slot), 0);
! 1423: EN_WRITE(sc, MIDX_DESCSTART(slot), 0);
! 1424: loc = sc->txslot[slot].cur = sc->txslot[slot].start;
! 1425: loc = loc - MID_RAMOFF;
! 1426: loc = (loc & ~((EN_TXSZ*1024) - 1)) >> 2; /* mask, cvt to words */
! 1427: loc = loc >> MIDV_LOCTOPSHFT; /* top 11 bits */
! 1428: EN_WRITE(sc, MIDX_PLACE(slot), MIDX_MKPLACE(en_k2sz(EN_TXSZ), loc));
! 1429: #ifdef EN_DEBUG
! 1430: printf("%s: tx%d: place 0x%x\n", sc->sc_dev.dv_xname, slot,
! 1431: EN_READ(sc, MIDX_PLACE(slot)));
! 1432: #endif
! 1433: }
! 1434:
! 1435: /*
! 1436: * enable!
! 1437: */
! 1438:
! 1439: EN_WRITE(sc, MID_INTENA, MID_INT_TX|MID_INT_DMA_OVR|MID_INT_IDENT|
! 1440: MID_INT_LERR|MID_INT_DMA_ERR|MID_INT_DMA_RX|MID_INT_DMA_TX|
! 1441: MID_INT_SERVICE| /* >>> MID_INT_SUNI| XXXCDC<<< */ MID_INT_STATS);
! 1442: EN_WRITE(sc, MID_MAST_CSR, MID_SETIPL(sc->ipl)|MID_MCSR_ENDMA|
! 1443: MID_MCSR_ENTX|MID_MCSR_ENRX);
! 1444:
! 1445: }
! 1446:
! 1447:
! 1448: /*
! 1449: * en_loadvc: load a vc tab entry from a slot
! 1450: */
! 1451:
! 1452: STATIC void en_loadvc(sc, vc)
! 1453:
! 1454: struct en_softc *sc;
! 1455: int vc;
! 1456:
! 1457: {
! 1458: int slot;
! 1459: u_int32_t reg = EN_READ(sc, MID_VC(vc));
! 1460:
! 1461: reg = MIDV_SETMODE(reg, MIDV_TRASH);
! 1462: EN_WRITE(sc, MID_VC(vc), reg);
! 1463: DELAY(27);
! 1464:
! 1465: if ((slot = sc->rxvc2slot[vc]) == RX_NONE)
! 1466: return;
! 1467:
! 1468: /* no need to set CRC */
! 1469: EN_WRITE(sc, MID_DST_RP(vc), 0); /* read pointer = 0, desc. start = 0 */
! 1470: EN_WRITE(sc, MID_WP_ST_CNT(vc), 0); /* write pointer = 0 */
! 1471: EN_WRITE(sc, MID_VC(vc), sc->rxslot[slot].mode); /* set mode, size, loc */
! 1472: sc->rxslot[slot].cur = sc->rxslot[slot].start;
! 1473:
! 1474: #ifdef EN_DEBUG
! 1475: printf("%s: rx%d: assigned to VCI %d\n", sc->sc_dev.dv_xname, slot, vc);
! 1476: #endif
! 1477: }
! 1478:
! 1479:
! 1480: /*
! 1481: * en_start: start transmitting the next packet that needs to go out
! 1482: * if there is one. note that atm_output() has already splnet()'d us.
! 1483: */
! 1484:
! 1485: STATIC void en_start(ifp)
! 1486:
! 1487: struct ifnet *ifp;
! 1488:
! 1489: {
! 1490: #ifdef MISSING_IF_SOFTC
! 1491: struct en_softc *sc = (struct en_softc *) en_cd.cd_devs[ifp->if_unit];
! 1492: #else
! 1493: struct en_softc *sc = (struct en_softc *) ifp->if_softc;
! 1494: #endif
! 1495: struct mbuf *m, *lastm, *prev;
! 1496: struct atm_pseudohdr *ap, *new_ap;
! 1497: int txchan, mlen, got, need, toadd, cellcnt, first;
! 1498: u_int32_t atm_vpi, atm_vci, atm_flags, *dat, aal;
! 1499: u_int8_t *cp;
! 1500:
! 1501: if ((ifp->if_flags & IFF_RUNNING) == 0)
! 1502: return;
! 1503:
! 1504: /*
! 1505: * remove everything from interface queue since we handle all queueing
! 1506: * locally ...
! 1507: */
! 1508:
! 1509: while (1) {
! 1510:
! 1511: IFQ_DEQUEUE(&ifp->if_snd, m);
! 1512: if (m == NULL)
! 1513: return; /* EMPTY: >>> exit here <<< */
! 1514:
! 1515: /*
! 1516: * calculate size of packet (in bytes)
! 1517: * also, if we are not doing transmit DMA we eliminate all stupid
! 1518: * (non-word) alignments here using en_mfix(). calls to en_mfix()
! 1519: * seem to be due to tcp retransmits for the most part.
! 1520: *
! 1521: * after this loop mlen total length of mbuf chain (including atm_ph),
! 1522: * and lastm is a pointer to the last mbuf on the chain.
! 1523: */
! 1524:
! 1525: lastm = m;
! 1526: mlen = 0;
! 1527: prev = NULL;
! 1528: while (1) {
! 1529: /* no DMA? */
! 1530: if ((!sc->is_adaptec && EN_ENIDMAFIX) || EN_NOTXDMA || !en_dma) {
! 1531: if ( (mtod(lastm, unsigned long) % sizeof(u_int32_t)) != 0 ||
! 1532: ((lastm->m_len % sizeof(u_int32_t)) != 0 && lastm->m_next)) {
! 1533: first = (lastm == m);
! 1534: if (en_mfix(sc, &lastm, prev) == 0) { /* failed? */
! 1535: m_freem(m);
! 1536: m = NULL;
! 1537: break;
! 1538: }
! 1539: if (first)
! 1540: m = lastm; /* update */
! 1541: }
! 1542: prev = lastm;
! 1543: }
! 1544: mlen += lastm->m_len;
! 1545: if (lastm->m_next == NULL)
! 1546: break;
! 1547: lastm = lastm->m_next;
! 1548: }
! 1549:
! 1550: if (m == NULL) /* happens only if mfix fails */
! 1551: continue;
! 1552:
! 1553: ap = mtod(m, struct atm_pseudohdr *);
! 1554:
! 1555: atm_vpi = ATM_PH_VPI(ap);
! 1556: atm_vci = ATM_PH_VCI(ap);
! 1557: atm_flags = ATM_PH_FLAGS(ap) & ~(EN_OBHDR|EN_OBTRL);
! 1558: aal = ((atm_flags & ATM_PH_AAL5) != 0)
! 1559: ? MID_TBD_AAL5 : MID_TBD_NOAAL5;
! 1560:
! 1561: /*
! 1562: * check that vpi/vci is one we can use
! 1563: */
! 1564:
! 1565: if (atm_vpi || atm_vci > MID_N_VC) {
! 1566: printf("%s: output vpi=%d, vci=%d out of card range, dropping...\n",
! 1567: sc->sc_dev.dv_xname, atm_vpi, atm_vci);
! 1568: m_freem(m);
! 1569: continue;
! 1570: }
! 1571:
! 1572: /*
! 1573: * computing how much padding we need on the end of the mbuf, then
! 1574: * see if we can put the TBD at the front of the mbuf where the
! 1575: * link header goes (well behaved protocols will reserve room for us).
! 1576: * last, check if room for PDU tail.
! 1577: *
! 1578: * got = number of bytes of data we have
! 1579: * cellcnt = number of cells in this mbuf
! 1580: * need = number of bytes of data + padding we need (excludes TBD)
! 1581: * toadd = number of bytes of data we need to add to end of mbuf,
! 1582: * [including AAL5 PDU, if AAL5]
! 1583: */
! 1584:
! 1585: got = mlen - sizeof(struct atm_pseudohdr);
! 1586: toadd = (aal == MID_TBD_AAL5) ? MID_PDU_SIZE : 0; /* PDU */
! 1587: cellcnt = (got + toadd + (MID_ATMDATASZ - 1)) / MID_ATMDATASZ;
! 1588: need = cellcnt * MID_ATMDATASZ;
! 1589: toadd = need - got; /* recompute, including zero padding */
! 1590:
! 1591: #ifdef EN_DEBUG
! 1592: printf("%s: txvci%d: mlen=%d, got=%d, need=%d, toadd=%d, cell#=%d\n",
! 1593: sc->sc_dev.dv_xname, atm_vci, mlen, got, need, toadd, cellcnt);
! 1594: printf(" leading_space=%d, trailing_space=%d\n",
! 1595: M_LEADINGSPACE(m), M_TRAILINGSPACE(lastm));
! 1596: #endif
! 1597:
! 1598: #ifdef EN_MBUF_OPT
! 1599:
! 1600: /*
! 1601: * note: external storage (M_EXT) can be shared between mbufs
! 1602: * to avoid copying (see m_copym()). this means that the same
! 1603: * data buffer could be shared by several mbufs, and thus it isn't
! 1604: * a good idea to try and write TBDs or PDUs to M_EXT data areas.
! 1605: */
! 1606:
! 1607: if (M_LEADINGSPACE(m) >= MID_TBD_SIZE && (m->m_flags & M_EXT) == 0) {
! 1608: m->m_data -= MID_TBD_SIZE;
! 1609: m->m_len += MID_TBD_SIZE;
! 1610: mlen += MID_TBD_SIZE;
! 1611: new_ap = mtod(m, struct atm_pseudohdr *);
! 1612: *new_ap = *ap; /* move it back */
! 1613: ap = new_ap;
! 1614: dat = ((u_int32_t *) ap) + 1;
! 1615: /* make sure the TBD is in proper byte order */
! 1616: *dat++ = htonl(MID_TBD_MK1(aal, sc->txspeed[atm_vci], cellcnt));
! 1617: *dat = htonl(MID_TBD_MK2(atm_vci, 0, 0));
! 1618: atm_flags |= EN_OBHDR;
! 1619: }
! 1620:
! 1621: if (toadd && (lastm->m_flags & M_EXT) == 0 &&
! 1622: M_TRAILINGSPACE(lastm) >= toadd) {
! 1623: cp = mtod(lastm, u_int8_t *) + lastm->m_len;
! 1624: lastm->m_len += toadd;
! 1625: mlen += toadd;
! 1626: if (aal == MID_TBD_AAL5) {
! 1627: bzero(cp, toadd - MID_PDU_SIZE);
! 1628: dat = (u_int32_t *)(cp + toadd - MID_PDU_SIZE);
! 1629: /* make sure the PDU is in proper byte order */
! 1630: *dat = htonl(MID_PDU_MK1(0, 0, got));
! 1631: } else {
! 1632: bzero(cp, toadd);
! 1633: }
! 1634: atm_flags |= EN_OBTRL;
! 1635: }
! 1636: ATM_PH_FLAGS(ap) = atm_flags; /* update EN_OBHDR/EN_OBTRL bits */
! 1637: #endif /* EN_MBUF_OPT */
! 1638:
! 1639: /*
! 1640: * get assigned channel (will be zero unless txspeed[atm_vci] is set)
! 1641: */
! 1642:
! 1643: txchan = sc->txvc2slot[atm_vci];
! 1644:
! 1645: if (sc->txslot[txchan].mbsize > EN_TXHIWAT) {
! 1646: EN_COUNT(sc->txmbovr);
! 1647: m_freem(m);
! 1648: #ifdef EN_DEBUG
! 1649: printf("%s: tx%d: buffer space shortage\n", sc->sc_dev.dv_xname,
! 1650: txchan);
! 1651: #endif
! 1652: continue;
! 1653: }
! 1654:
! 1655: sc->txslot[txchan].mbsize += mlen;
! 1656:
! 1657: #ifdef EN_DEBUG
! 1658: printf("%s: tx%d: VPI=%d, VCI=%d, FLAGS=0x%x, speed=0x%x\n",
! 1659: sc->sc_dev.dv_xname, txchan, atm_vpi, atm_vci, atm_flags,
! 1660: sc->txspeed[atm_vci]);
! 1661: printf(" adjusted mlen=%d, mbsize=%d\n", mlen,
! 1662: sc->txslot[txchan].mbsize);
! 1663: #endif
! 1664:
! 1665: IF_ENQUEUE(&sc->txslot[txchan].q, m);
! 1666: en_txdma(sc, txchan);
! 1667:
! 1668: }
! 1669: /*NOTREACHED*/
! 1670: }
! 1671:
! 1672:
! 1673: /*
! 1674: * en_mfix: fix a stupid mbuf
! 1675: */
! 1676:
! 1677: STATIC int en_mfix(sc, mm, prev)
! 1678:
! 1679: struct en_softc *sc;
! 1680: struct mbuf **mm, *prev;
! 1681:
! 1682: {
! 1683: struct mbuf *m, *new;
! 1684: u_char *d, *cp;
! 1685: int off;
! 1686: struct mbuf *nxt;
! 1687:
! 1688: m = *mm;
! 1689:
! 1690: EN_COUNT(sc->mfix); /* count # of calls */
! 1691: #ifdef EN_DEBUG
! 1692: printf("%s: mfix mbuf m_data=%p, m_len=%d\n", sc->sc_dev.dv_xname,
! 1693: m->m_data, m->m_len);
! 1694: #endif
! 1695:
! 1696: d = mtod(m, u_char *);
! 1697: off = ((unsigned long) d) % sizeof(u_int32_t);
! 1698:
! 1699: if (off) {
! 1700: if ((m->m_flags & M_EXT) == 0) {
! 1701: bcopy(d, d - off, m->m_len); /* ALIGN! (with costly data copy...) */
! 1702: d -= off;
! 1703: m->m_data = (caddr_t)d;
! 1704: } else {
! 1705: /* can't write to an M_EXT mbuf since it may be shared */
! 1706: MGET(new, M_DONTWAIT, MT_DATA);
! 1707: if (!new) {
! 1708: EN_COUNT(sc->mfixfail);
! 1709: return(0);
! 1710: }
! 1711: MCLGET(new, M_DONTWAIT);
! 1712: if ((new->m_flags & M_EXT) == 0) {
! 1713: m_free(new);
! 1714: EN_COUNT(sc->mfixfail);
! 1715: return(0);
! 1716: }
! 1717: bcopy(d, new->m_data, m->m_len); /* ALIGN! (with costly data copy...) */
! 1718: new->m_len = m->m_len;
! 1719: new->m_next = m->m_next;
! 1720: if (prev)
! 1721: prev->m_next = new;
! 1722: m_free(m);
! 1723: *mm = m = new; /* note: 'd' now invalid */
! 1724: }
! 1725: }
! 1726:
! 1727: off = m->m_len % sizeof(u_int32_t);
! 1728: if (off == 0)
! 1729: return(1);
! 1730:
! 1731: d = mtod(m, u_char *) + m->m_len;
! 1732: off = sizeof(u_int32_t) - off;
! 1733:
! 1734: nxt = m->m_next;
! 1735: while (off--) {
! 1736: for ( ; nxt != NULL && nxt->m_len == 0 ; nxt = nxt->m_next)
! 1737: /*null*/;
! 1738: if (nxt == NULL) { /* out of data, zero fill */
! 1739: *d++ = 0;
! 1740: continue; /* next "off" */
! 1741: }
! 1742: cp = mtod(nxt, u_char *);
! 1743: *d++ = *cp++;
! 1744: m->m_len++;
! 1745: nxt->m_len--;
! 1746: nxt->m_data = (caddr_t)cp;
! 1747: }
! 1748: return(1);
! 1749: }
! 1750:
! 1751:
! 1752: /*
! 1753: * en_txdma: start transmit DMA, if possible
! 1754: */
! 1755:
! 1756: STATIC void en_txdma(sc, chan)
! 1757:
! 1758: struct en_softc *sc;
! 1759: int chan;
! 1760:
! 1761: {
! 1762: struct mbuf *tmp;
! 1763: struct atm_pseudohdr *ap;
! 1764: struct en_launch launch;
! 1765: int datalen = 0, dtqneed, len, ncells;
! 1766: u_int8_t *cp;
! 1767:
! 1768: #ifdef EN_DEBUG
! 1769: printf("%s: tx%d: starting...\n", sc->sc_dev.dv_xname, chan);
! 1770: #endif
! 1771:
! 1772: /*
! 1773: * note: now that txlaunch handles non-word aligned/sized requests
! 1774: * the only time you can safely set launch.nodma is if you've en_mfix()'d
! 1775: * the mbuf chain. this happens only if EN_NOTXDMA || !en_dma.
! 1776: */
! 1777:
! 1778: launch.nodma = (EN_NOTXDMA || !en_dma);
! 1779:
! 1780: again:
! 1781:
! 1782: /*
! 1783: * get an mbuf waiting for DMA
! 1784: */
! 1785:
! 1786: launch.t = sc->txslot[chan].q.ifq_head; /* peek at head of queue */
! 1787:
! 1788: if (launch.t == NULL) {
! 1789: #ifdef EN_DEBUG
! 1790: printf("%s: tx%d: ...done!\n", sc->sc_dev.dv_xname, chan);
! 1791: #endif
! 1792: return; /* >>> exit here if no data waiting for DMA <<< */
! 1793: }
! 1794:
! 1795: /*
! 1796: * get flags, vci
! 1797: *
! 1798: * note: launch.need = # bytes we need to get on the card
! 1799: * dtqneed = # of DTQs we need for this packet
! 1800: * launch.mlen = # of bytes in in mbuf chain (<= launch.need)
! 1801: */
! 1802:
! 1803: ap = mtod(launch.t, struct atm_pseudohdr *);
! 1804: launch.atm_vci = ATM_PH_VCI(ap);
! 1805: launch.atm_flags = ATM_PH_FLAGS(ap);
! 1806: launch.aal = ((launch.atm_flags & ATM_PH_AAL5) != 0) ?
! 1807: MID_TBD_AAL5 : MID_TBD_NOAAL5;
! 1808:
! 1809: /*
! 1810: * XXX: have to recompute the length again, even though we already did
! 1811: * it in en_start(). might as well compute dtqneed here as well, so
! 1812: * this isn't that bad.
! 1813: */
! 1814:
! 1815: if ((launch.atm_flags & EN_OBHDR) == 0) {
! 1816: dtqneed = 1; /* header still needs to be added */
! 1817: launch.need = MID_TBD_SIZE; /* not included with mbuf */
! 1818: } else {
! 1819: dtqneed = 0; /* header on-board, dma with mbuf */
! 1820: launch.need = 0;
! 1821: }
! 1822:
! 1823: launch.mlen = 0;
! 1824: for (tmp = launch.t ; tmp != NULL ; tmp = tmp->m_next) {
! 1825: len = tmp->m_len;
! 1826: launch.mlen += len;
! 1827: cp = mtod(tmp, u_int8_t *);
! 1828: if (tmp == launch.t) {
! 1829: len -= sizeof(struct atm_pseudohdr); /* don't count this! */
! 1830: cp += sizeof(struct atm_pseudohdr);
! 1831: }
! 1832: launch.need += len;
! 1833: if (len == 0)
! 1834: continue; /* atm_pseudohdr alone in first mbuf */
! 1835:
! 1836: dtqneed += en_dqneed(sc, (caddr_t) cp, len, 1);
! 1837: }
! 1838:
! 1839: if ((launch.need % sizeof(u_int32_t)) != 0)
! 1840: dtqneed++; /* need DTQ to FLUSH internal buffer */
! 1841:
! 1842: if ((launch.atm_flags & EN_OBTRL) == 0) {
! 1843: if (launch.aal == MID_TBD_AAL5) {
! 1844: datalen = launch.need - MID_TBD_SIZE;
! 1845: launch.need += MID_PDU_SIZE; /* AAL5: need PDU tail */
! 1846: }
! 1847: dtqneed++; /* need to work on the end a bit */
! 1848: }
! 1849:
! 1850: /*
! 1851: * finish calculation of launch.need (need to figure out how much padding
! 1852: * we will need). launch.need includes MID_TBD_SIZE, but we need to
! 1853: * remove that to so we can round off properly. we have to add
! 1854: * MID_TBD_SIZE back in after calculating ncells.
! 1855: */
! 1856:
! 1857: launch.need = roundup(launch.need - MID_TBD_SIZE, MID_ATMDATASZ);
! 1858: ncells = launch.need / MID_ATMDATASZ;
! 1859: launch.need += MID_TBD_SIZE;
! 1860:
! 1861: if (launch.need > EN_TXSZ * 1024) {
! 1862: printf("%s: tx%d: packet larger than xmit buffer (%d > %d)\n",
! 1863: sc->sc_dev.dv_xname, chan, launch.need, EN_TXSZ * 1024);
! 1864: goto dequeue_drop;
! 1865: }
! 1866:
! 1867: /*
! 1868: * note: note that we cannot totally fill the circular buffer (i.e.
! 1869: * we can't use up all of the remaining sc->txslot[chan].bfree free
! 1870: * bytes) because that would cause the circular buffer read pointer
! 1871: * to become equal to the write pointer, thus signaling 'empty buffer'
! 1872: * to the hardware and stopping the transmitter.
! 1873: */
! 1874: if (launch.need >= sc->txslot[chan].bfree) {
! 1875: EN_COUNT(sc->txoutspace);
! 1876: #ifdef EN_DEBUG
! 1877: printf("%s: tx%d: out of transmit space\n", sc->sc_dev.dv_xname, chan);
! 1878: #endif
! 1879: return; /* >>> exit here if out of obmem buffer space <<< */
! 1880: }
! 1881:
! 1882: /*
! 1883: * ensure we have enough dtqs to go, if not, wait for more.
! 1884: */
! 1885:
! 1886: if (launch.nodma) {
! 1887: dtqneed = 1;
! 1888: }
! 1889: if (dtqneed > sc->dtq_free) {
! 1890: sc->need_dtqs = 1;
! 1891: EN_COUNT(sc->txdtqout);
! 1892: #ifdef EN_DEBUG
! 1893: printf("%s: tx%d: out of transmit DTQs\n", sc->sc_dev.dv_xname, chan);
! 1894: #endif
! 1895: return; /* >>> exit here if out of dtqs <<< */
! 1896: }
! 1897:
! 1898: /*
! 1899: * it is a go, commit! dequeue mbuf start working on the xfer.
! 1900: */
! 1901:
! 1902: IF_DEQUEUE(&sc->txslot[chan].q, tmp);
! 1903: #ifdef EN_DIAG
! 1904: if (launch.t != tmp)
! 1905: panic("en dequeue");
! 1906: #endif /* EN_DIAG */
! 1907:
! 1908: /*
! 1909: * launch!
! 1910: */
! 1911:
! 1912: EN_COUNT(sc->launch);
! 1913: sc->enif.if_opackets++;
! 1914: if ((launch.atm_flags & EN_OBHDR) == 0) {
! 1915: EN_COUNT(sc->lheader);
! 1916: /* store tbd1/tbd2 in host byte order */
! 1917: launch.tbd1 = MID_TBD_MK1(launch.aal, sc->txspeed[launch.atm_vci], ncells);
! 1918: launch.tbd2 = MID_TBD_MK2(launch.atm_vci, 0, 0);
! 1919: }
! 1920: if ((launch.atm_flags & EN_OBTRL) == 0 && launch.aal == MID_TBD_AAL5) {
! 1921: EN_COUNT(sc->ltail);
! 1922: launch.pdu1 = MID_PDU_MK1(0, 0, datalen); /* host byte order */
! 1923: }
! 1924:
! 1925: #if NBPFILTER > 0
! 1926: if (sc->enif.if_bpf != NULL) {
! 1927: /*
! 1928: * adjust the top of the mbuf to skip the TBD if present
! 1929: * before passing the packet to bpf.
! 1930: * Also remove padding and the PDU trailer. Assume both of
! 1931: * them to be in the same mbuf. pktlen, m_len and m_data
! 1932: * are not needed anymore so we can change them.
! 1933: */
! 1934: int size = sizeof(struct atm_pseudohdr);
! 1935: if (launch.atm_flags & EN_OBHDR)
! 1936: size += MID_TBD_SIZE;
! 1937:
! 1938: launch.t->m_data += size;
! 1939: launch.t->m_len -= size;
! 1940:
! 1941: bpf_mtap(sc->enif.if_bpf, launch.t, BPF_DIRECTION_OUT);
! 1942:
! 1943: launch.t->m_data -= size;
! 1944: launch.t->m_len += size;
! 1945: }
! 1946: #endif
! 1947:
! 1948: en_txlaunch(sc, chan, &launch);
! 1949:
! 1950: /*
! 1951: * do some housekeeping and get the next packet
! 1952: */
! 1953:
! 1954: sc->txslot[chan].bfree -= launch.need;
! 1955: IF_ENQUEUE(&sc->txslot[chan].indma, launch.t);
! 1956: goto again;
! 1957:
! 1958: /*
! 1959: * END of txdma loop!
! 1960: */
! 1961:
! 1962: /*
! 1963: * error handles
! 1964: */
! 1965:
! 1966: dequeue_drop:
! 1967: IF_DEQUEUE(&sc->txslot[chan].q, tmp);
! 1968: if (launch.t != tmp)
! 1969: panic("en dequeue drop");
! 1970: m_freem(launch.t);
! 1971: sc->txslot[chan].mbsize -= launch.mlen;
! 1972: goto again;
! 1973: }
! 1974:
! 1975:
! 1976: /*
! 1977: * en_txlaunch: launch an mbuf into the dma pool!
! 1978: */
! 1979:
! 1980: STATIC void en_txlaunch(sc, chan, l)
! 1981:
! 1982: struct en_softc *sc;
! 1983: int chan;
! 1984: struct en_launch *l;
! 1985:
! 1986: {
! 1987: struct mbuf *tmp;
! 1988: u_int32_t cur = sc->txslot[chan].cur,
! 1989: start = sc->txslot[chan].start,
! 1990: stop = sc->txslot[chan].stop,
! 1991: dma, *data, *datastop, count, bcode;
! 1992: int pad, addtail, need, len, needalign, cnt, end, mx;
! 1993:
! 1994:
! 1995: /*
! 1996: * vars:
! 1997: * need = # bytes card still needs (decr. to zero)
! 1998: * len = # of bytes left in current mbuf
! 1999: * cur = our current pointer
! 2000: * dma = last place we programmed into the DMA
! 2001: * data = pointer into data area of mbuf that needs to go next
! 2002: * cnt = # of bytes to transfer in this DTQ
! 2003: * bcode/count = DMA burst code, and chip's version of cnt
! 2004: *
! 2005: * a single buffer can require up to 5 DTQs depending on its size
! 2006: * and alignment requirements. the 5 possible requests are:
! 2007: * [1] 1, 2, or 3 byte DMA to align src data pointer to word boundary
! 2008: * [2] alburst DMA to align src data pointer to bestburstlen
! 2009: * [3] 1 or more bestburstlen DMAs
! 2010: * [4] clean up burst (to last word boundary)
! 2011: * [5] 1, 2, or 3 byte final clean up DMA
! 2012: */
! 2013:
! 2014: need = l->need;
! 2015: dma = cur;
! 2016: addtail = (l->atm_flags & EN_OBTRL) == 0; /* add a tail? */
! 2017:
! 2018: #ifdef EN_DIAG
! 2019: if ((need - MID_TBD_SIZE) % MID_ATMDATASZ)
! 2020: printf("%s: tx%d: bogus transmit needs (%d)\n", sc->sc_dev.dv_xname, chan,
! 2021: need);
! 2022: #endif
! 2023: #ifdef EN_DEBUG
! 2024: printf("%s: tx%d: launch mbuf %p! cur=0x%x[%d], need=%d, addtail=%d\n",
! 2025: sc->sc_dev.dv_xname, chan, l->t, cur, (cur-start)/4, need, addtail);
! 2026: count = EN_READ(sc, MIDX_PLACE(chan));
! 2027: printf(" HW: base_address=0x%x, size=%d, read=%d, descstart=%d\n",
! 2028: MIDX_BASE(count), MIDX_SZ(count), EN_READ(sc, MIDX_READPTR(chan)),
! 2029: EN_READ(sc, MIDX_DESCSTART(chan)));
! 2030: #endif
! 2031:
! 2032: /*
! 2033: * do we need to insert the TBD by hand?
! 2034: * note that tbd1/tbd2/pdu1 are in host byte order.
! 2035: */
! 2036:
! 2037: if ((l->atm_flags & EN_OBHDR) == 0) {
! 2038: #ifdef EN_DEBUG
! 2039: printf("%s: tx%d: insert header 0x%x 0x%x\n", sc->sc_dev.dv_xname,
! 2040: chan, l->tbd1, l->tbd2);
! 2041: #endif
! 2042: EN_WRITE(sc, cur, l->tbd1);
! 2043: EN_WRAPADD(start, stop, cur, 4);
! 2044: EN_WRITE(sc, cur, l->tbd2);
! 2045: EN_WRAPADD(start, stop, cur, 4);
! 2046: need -= 8;
! 2047: }
! 2048:
! 2049: /*
! 2050: * now do the mbufs...
! 2051: */
! 2052:
! 2053: for (tmp = l->t ; tmp != NULL ; tmp = tmp->m_next) {
! 2054:
! 2055: /* get pointer to data and length */
! 2056: data = mtod(tmp, u_int32_t *);
! 2057: len = tmp->m_len;
! 2058: if (tmp == l->t) {
! 2059: data += sizeof(struct atm_pseudohdr)/sizeof(u_int32_t);
! 2060: len -= sizeof(struct atm_pseudohdr);
! 2061: }
! 2062:
! 2063: /* now, determine if we should copy it */
! 2064: if (l->nodma || (len < EN_MINDMA &&
! 2065: (len % 4) == 0 && ((unsigned long) data % 4) == 0 && (cur % 4) == 0)) {
! 2066:
! 2067: /*
! 2068: * roundup len: the only time this will change the value of len
! 2069: * is when l->nodma is true, tmp is the last mbuf, and there is
! 2070: * a non-word number of bytes to transmit. in this case it is
! 2071: * safe to round up because we've en_mfix'd the mbuf (so the first
! 2072: * byte is word aligned there must be enough free bytes at the end
! 2073: * to round off to the next word boundary)...
! 2074: */
! 2075: len = roundup(len, sizeof(u_int32_t));
! 2076: datastop = data + (len / sizeof(u_int32_t));
! 2077: /* copy loop: preserve byte order!!! use WRITEDAT */
! 2078: while (data != datastop) {
! 2079: EN_WRITEDAT(sc, cur, *data);
! 2080: data++;
! 2081: EN_WRAPADD(start, stop, cur, 4);
! 2082: }
! 2083: need -= len;
! 2084: #ifdef EN_DEBUG
! 2085: printf("%s: tx%d: copied %d bytes (%d left, cur now 0x%x)\n",
! 2086: sc->sc_dev.dv_xname, chan, len, need, cur);
! 2087: #endif
! 2088: continue; /* continue on to next mbuf */
! 2089: }
! 2090:
! 2091: /* going to do DMA, first make sure the dtq is in sync. */
! 2092: if (dma != cur) {
! 2093: EN_DTQADD(sc, WORD_IDX(start,cur), chan, MIDDMA_JK, 0, 0, 0);
! 2094: #ifdef EN_DEBUG
! 2095: printf("%s: tx%d: dtq_sync: advance pointer to %d\n",
! 2096: sc->sc_dev.dv_xname, chan, cur);
! 2097: #endif
! 2098: }
! 2099:
! 2100: /*
! 2101: * if this is the last buffer, and it looks like we are going to need to
! 2102: * flush the internal buffer, can we extend the length of this mbuf to
! 2103: * avoid the FLUSH?
! 2104: */
! 2105:
! 2106: if (tmp->m_next == NULL) {
! 2107: cnt = (need - len) % sizeof(u_int32_t);
! 2108: if (cnt && M_TRAILINGSPACE(tmp) >= cnt)
! 2109: len += cnt; /* pad for FLUSH */
! 2110: }
! 2111:
! 2112: #if !defined(MIDWAY_ENIONLY)
! 2113:
! 2114: /*
! 2115: * the adaptec DMA engine is smart and handles everything for us.
! 2116: */
! 2117:
! 2118: if (sc->is_adaptec) {
! 2119: /* need to DMA "len" bytes out to card */
! 2120: need -= len;
! 2121: EN_WRAPADD(start, stop, cur, len);
! 2122: #ifdef EN_DEBUG
! 2123: printf("%s: tx%d: adp_dma %d bytes (%d left, cur now 0x%x)\n",
! 2124: sc->sc_dev.dv_xname, chan, len, need, cur);
! 2125: #endif
! 2126: end = (need == 0) ? MID_DMA_END : 0;
! 2127: EN_DTQADD(sc, len, chan, 0, vtophys(data), l->mlen, end);
! 2128: if (end)
! 2129: goto done;
! 2130: dma = cur; /* update dma pointer */
! 2131: continue;
! 2132: }
! 2133: #endif /* !MIDWAY_ENIONLY */
! 2134:
! 2135: #if !defined(MIDWAY_ADPONLY)
! 2136:
! 2137: /*
! 2138: * the ENI DMA engine is not so smart and need more help from us
! 2139: */
! 2140:
! 2141: /* do we need to do a DMA op to align to word boundary? */
! 2142: needalign = (unsigned long) data % sizeof(u_int32_t);
! 2143: if (needalign) {
! 2144: EN_COUNT(sc->headbyte);
! 2145: cnt = sizeof(u_int32_t) - needalign;
! 2146: if (cnt == 2 && len >= cnt) {
! 2147: count = 1;
! 2148: bcode = MIDDMA_2BYTE;
! 2149: } else {
! 2150: cnt = min(cnt, len); /* prevent overflow */
! 2151: count = cnt;
! 2152: bcode = MIDDMA_BYTE;
! 2153: }
! 2154: need -= cnt;
! 2155: EN_WRAPADD(start, stop, cur, cnt);
! 2156: #ifdef EN_DEBUG
! 2157: printf("%s: tx%d: small al_dma %d bytes (%d left, cur now 0x%x)\n",
! 2158: sc->sc_dev.dv_xname, chan, cnt, need, cur);
! 2159: #endif
! 2160: len -= cnt;
! 2161: end = (need == 0) ? MID_DMA_END : 0;
! 2162: EN_DTQADD(sc, count, chan, bcode, vtophys(data), l->mlen, end);
! 2163: if (end)
! 2164: goto done;
! 2165: data = (u_int32_t *) ((u_char *)data + cnt);
! 2166: }
! 2167:
! 2168: /* do we need to do a DMA op to align? */
! 2169: if (sc->alburst &&
! 2170: (needalign = (((unsigned long) data) & sc->bestburstmask)) != 0
! 2171: && len >= sizeof(u_int32_t)) {
! 2172: cnt = sc->bestburstlen - needalign;
! 2173: mx = len & ~(sizeof(u_int32_t)-1); /* don't go past end */
! 2174: if (cnt > mx) {
! 2175: cnt = mx;
! 2176: count = cnt / sizeof(u_int32_t);
! 2177: bcode = MIDDMA_WORD;
! 2178: } else {
! 2179: count = cnt / sizeof(u_int32_t);
! 2180: bcode = en_dmaplan[count].bcode;
! 2181: count = cnt >> en_dmaplan[count].divshift;
! 2182: }
! 2183: need -= cnt;
! 2184: EN_WRAPADD(start, stop, cur, cnt);
! 2185: #ifdef EN_DEBUG
! 2186: printf("%s: tx%d: al_dma %d bytes (%d left, cur now 0x%x)\n",
! 2187: sc->sc_dev.dv_xname, chan, cnt, need, cur);
! 2188: #endif
! 2189: len -= cnt;
! 2190: end = (need == 0) ? MID_DMA_END : 0;
! 2191: EN_DTQADD(sc, count, chan, bcode, vtophys(data), l->mlen, end);
! 2192: if (end)
! 2193: goto done;
! 2194: data = (u_int32_t *) ((u_char *)data + cnt);
! 2195: }
! 2196:
! 2197: /* do we need to do a max-sized burst? */
! 2198: if (len >= sc->bestburstlen) {
! 2199: count = len >> sc->bestburstshift;
! 2200: cnt = count << sc->bestburstshift;
! 2201: bcode = sc->bestburstcode;
! 2202: need -= cnt;
! 2203: EN_WRAPADD(start, stop, cur, cnt);
! 2204: #ifdef EN_DEBUG
! 2205: printf("%s: tx%d: best_dma %d bytes (%d left, cur now 0x%x)\n",
! 2206: sc->sc_dev.dv_xname, chan, cnt, need, cur);
! 2207: #endif
! 2208: len -= cnt;
! 2209: end = (need == 0) ? MID_DMA_END : 0;
! 2210: EN_DTQADD(sc, count, chan, bcode, vtophys(data), l->mlen, end);
! 2211: if (end)
! 2212: goto done;
! 2213: data = (u_int32_t *) ((u_char *)data + cnt);
! 2214: }
! 2215:
! 2216: /* do we need to do a cleanup burst? */
! 2217: cnt = len & ~(sizeof(u_int32_t)-1);
! 2218: if (cnt) {
! 2219: count = cnt / sizeof(u_int32_t);
! 2220: bcode = en_dmaplan[count].bcode;
! 2221: count = cnt >> en_dmaplan[count].divshift;
! 2222: need -= cnt;
! 2223: EN_WRAPADD(start, stop, cur, cnt);
! 2224: #ifdef EN_DEBUG
! 2225: printf("%s: tx%d: cleanup_dma %d bytes (%d left, cur now 0x%x)\n",
! 2226: sc->sc_dev.dv_xname, chan, cnt, need, cur);
! 2227: #endif
! 2228: len -= cnt;
! 2229: end = (need == 0) ? MID_DMA_END : 0;
! 2230: EN_DTQADD(sc, count, chan, bcode, vtophys(data), l->mlen, end);
! 2231: if (end)
! 2232: goto done;
! 2233: data = (u_int32_t *) ((u_char *)data + cnt);
! 2234: }
! 2235:
! 2236: /* any word fragments left? */
! 2237: if (len) {
! 2238: EN_COUNT(sc->tailbyte);
! 2239: if (len == 2) {
! 2240: count = 1;
! 2241: bcode = MIDDMA_2BYTE; /* use 2byte mode */
! 2242: } else {
! 2243: count = len;
! 2244: bcode = MIDDMA_BYTE; /* use 1 byte mode */
! 2245: }
! 2246: need -= len;
! 2247: EN_WRAPADD(start, stop, cur, len);
! 2248: #ifdef EN_DEBUG
! 2249: printf("%s: tx%d: byte cleanup_dma %d bytes (%d left, cur now 0x%x)\n",
! 2250: sc->sc_dev.dv_xname, chan, len, need, cur);
! 2251: #endif
! 2252: end = (need == 0) ? MID_DMA_END : 0;
! 2253: EN_DTQADD(sc, count, chan, bcode, vtophys(data), l->mlen, end);
! 2254: if (end)
! 2255: goto done;
! 2256: }
! 2257:
! 2258: dma = cur; /* update dma pointer */
! 2259: #endif /* !MIDWAY_ADPONLY */
! 2260:
! 2261: } /* next mbuf, please */
! 2262:
! 2263: /*
! 2264: * all mbuf data has been copied out to the obmem (or set up to be DMAd).
! 2265: * if the trailer or padding needs to be put in, do it now.
! 2266: *
! 2267: * NOTE: experimental results reveal the following fact:
! 2268: * if you DMA "X" bytes to the card, where X is not a multiple of 4,
! 2269: * then the card will internally buffer the last (X % 4) bytes (in
! 2270: * hopes of getting (4 - (X % 4)) more bytes to make a complete word).
! 2271: * it is imporant to make sure we don't leave any important data in
! 2272: * this internal buffer because it is discarded on the last (end) DTQ.
! 2273: * one way to do this is to DMA in (4 - (X % 4)) more bytes to flush
! 2274: * the darn thing out.
! 2275: */
! 2276:
! 2277: if (addtail) {
! 2278:
! 2279: pad = need % sizeof(u_int32_t);
! 2280: if (pad) {
! 2281: /*
! 2282: * FLUSH internal data buffer. pad out with random data from the front
! 2283: * of the mbuf chain...
! 2284: */
! 2285: bcode = (sc->is_adaptec) ? 0 : MIDDMA_BYTE;
! 2286: EN_COUNT(sc->tailflush);
! 2287: EN_WRAPADD(start, stop, cur, pad);
! 2288: EN_DTQADD(sc, pad, chan, bcode, vtophys(l->t->m_data), 0, 0);
! 2289: need -= pad;
! 2290: #ifdef EN_DEBUG
! 2291: printf("%s: tx%d: pad/FLUSH dma %d bytes (%d left, cur now 0x%x)\n",
! 2292: sc->sc_dev.dv_xname, chan, pad, need, cur);
! 2293: #endif
! 2294: }
! 2295:
! 2296: /* copy data */
! 2297: pad = need / sizeof(u_int32_t); /* round *down* */
! 2298: if (l->aal == MID_TBD_AAL5)
! 2299: pad -= 2;
! 2300: #ifdef EN_DEBUG
! 2301: printf("%s: tx%d: padding %d bytes (cur now 0x%x)\n",
! 2302: sc->sc_dev.dv_xname, chan, pad * sizeof(u_int32_t), cur);
! 2303: #endif
! 2304: while (pad--) {
! 2305: EN_WRITEDAT(sc, cur, 0); /* no byte order issues with zero */
! 2306: EN_WRAPADD(start, stop, cur, 4);
! 2307: }
! 2308: if (l->aal == MID_TBD_AAL5) {
! 2309: EN_WRITE(sc, cur, l->pdu1); /* in host byte order */
! 2310: EN_WRAPADD(start, stop, cur, 8);
! 2311: }
! 2312: }
! 2313:
! 2314: if (addtail || dma != cur) {
! 2315: /* write final descriptor */
! 2316: EN_DTQADD(sc, WORD_IDX(start,cur), chan, MIDDMA_JK, 0,
! 2317: l->mlen, MID_DMA_END);
! 2318: /* dma = cur; */ /* not necessary since we are done */
! 2319: }
! 2320:
! 2321: done:
! 2322: /* update current pointer */
! 2323: sc->txslot[chan].cur = cur;
! 2324: #ifdef EN_DEBUG
! 2325: printf("%s: tx%d: DONE! cur now = 0x%x\n",
! 2326: sc->sc_dev.dv_xname, chan, cur);
! 2327: #endif
! 2328:
! 2329: return;
! 2330: }
! 2331:
! 2332:
! 2333: /*
! 2334: * interrupt handler
! 2335: */
! 2336:
! 2337: EN_INTR_TYPE en_intr(arg)
! 2338:
! 2339: void *arg;
! 2340:
! 2341: {
! 2342: struct en_softc *sc = (struct en_softc *) arg;
! 2343: struct mbuf *m;
! 2344: struct atm_pseudohdr ah;
! 2345: u_int32_t reg, kick, val, mask, chip, vci, slot, dtq, drq;
! 2346: int lcv, idx, need_softserv = 0;
! 2347:
! 2348: reg = EN_READ(sc, MID_INTACK);
! 2349:
! 2350: if ((reg & MID_INT_ANY) == 0)
! 2351: EN_INTR_RET(0); /* not us */
! 2352:
! 2353: #ifdef EN_DEBUG
! 2354: printf("%s: interrupt=0x%b\n", sc->sc_dev.dv_xname, reg, MID_INTBITS);
! 2355: #endif
! 2356:
! 2357: /*
! 2358: * unexpected errors that need a reset
! 2359: */
! 2360:
! 2361: if ((reg & (MID_INT_IDENT|MID_INT_LERR|MID_INT_DMA_ERR|MID_INT_SUNI)) != 0) {
! 2362: printf("%s: unexpected interrupt=0x%b, resetting card\n",
! 2363: sc->sc_dev.dv_xname, reg, MID_INTBITS);
! 2364: #ifdef EN_DEBUG
! 2365: #ifdef DDB
! 2366: Debugger();
! 2367: #endif /* DDB */
! 2368: sc->enif.if_flags &= ~IFF_RUNNING; /* FREEZE! */
! 2369: #else
! 2370: en_reset(sc);
! 2371: en_init(sc);
! 2372: #endif
! 2373: EN_INTR_RET(1); /* for us */
! 2374: }
! 2375:
! 2376: /*******************
! 2377: * xmit interrupts *
! 2378: ******************/
! 2379:
! 2380: kick = 0; /* bitmask of channels to kick */
! 2381: if (reg & MID_INT_TX) { /* TX done! */
! 2382:
! 2383: /*
! 2384: * check for tx complete, if detected then this means that some space
! 2385: * has come free on the card. we must account for it and arrange to
! 2386: * kick the channel to life (in case it is stalled waiting on the card).
! 2387: */
! 2388: for (mask = 1, lcv = 0 ; lcv < EN_NTX ; lcv++, mask = mask * 2) {
! 2389: if (reg & MID_TXCHAN(lcv)) {
! 2390: kick = kick | mask; /* want to kick later */
! 2391: val = EN_READ(sc, MIDX_READPTR(lcv)); /* current read pointer */
! 2392: val = (val * sizeof(u_int32_t)) + sc->txslot[lcv].start;
! 2393: /* convert to offset */
! 2394: if (val > sc->txslot[lcv].cur)
! 2395: sc->txslot[lcv].bfree = val - sc->txslot[lcv].cur;
! 2396: else
! 2397: sc->txslot[lcv].bfree = (val + (EN_TXSZ*1024)) - sc->txslot[lcv].cur;
! 2398: #ifdef EN_DEBUG
! 2399: printf("%s: tx%d: transmit done. %d bytes now free in buffer\n",
! 2400: sc->sc_dev.dv_xname, lcv, sc->txslot[lcv].bfree);
! 2401: #endif
! 2402: }
! 2403: }
! 2404: }
! 2405:
! 2406: if (reg & MID_INT_DMA_TX) { /* TX DMA done! */
! 2407:
! 2408: /*
! 2409: * check for TX DMA complete, if detected then this means that some DTQs
! 2410: * are now free. it also means some indma mbufs can be freed.
! 2411: * if we needed DTQs, kick all channels.
! 2412: */
! 2413: val = EN_READ(sc, MID_DMA_RDTX); /* chip's current location */
! 2414: idx = MID_DTQ_A2REG(sc->dtq_chip);/* where we last saw chip */
! 2415: if (sc->need_dtqs) {
! 2416: kick = MID_NTX_CH - 1; /* assume power of 2, kick all! */
! 2417: sc->need_dtqs = 0; /* recalculated in "kick" loop below */
! 2418: #ifdef EN_DEBUG
! 2419: printf("%s: cleared need DTQ condition\n", sc->sc_dev.dv_xname);
! 2420: #endif
! 2421: }
! 2422: while (idx != val) {
! 2423: sc->dtq_free++;
! 2424: if ((dtq = sc->dtq[idx]) != 0) {
! 2425: sc->dtq[idx] = 0; /* don't forget to zero it out when done */
! 2426: slot = EN_DQ_SLOT(dtq);
! 2427: IF_DEQUEUE(&sc->txslot[slot].indma, m);
! 2428: if (!m) panic("enintr: dtqsync");
! 2429: sc->txslot[slot].mbsize -= EN_DQ_LEN(dtq);
! 2430: #ifdef EN_DEBUG
! 2431: printf("%s: tx%d: free %d dma bytes, mbsize now %d\n",
! 2432: sc->sc_dev.dv_xname, slot, EN_DQ_LEN(dtq),
! 2433: sc->txslot[slot].mbsize);
! 2434: #endif
! 2435: m_freem(m);
! 2436: }
! 2437: EN_WRAPADD(0, MID_DTQ_N, idx, 1);
! 2438: }
! 2439: sc->dtq_chip = MID_DTQ_REG2A(val); /* sync softc */
! 2440: }
! 2441:
! 2442:
! 2443: /*
! 2444: * kick xmit channels as needed
! 2445: */
! 2446:
! 2447: if (kick) {
! 2448: #ifdef EN_DEBUG
! 2449: printf("%s: tx kick mask = 0x%x\n", sc->sc_dev.dv_xname, kick);
! 2450: #endif
! 2451: for (mask = 1, lcv = 0 ; lcv < EN_NTX ; lcv++, mask = mask * 2) {
! 2452: if ((kick & mask) && sc->txslot[lcv].q.ifq_head) {
! 2453: en_txdma(sc, lcv); /* kick it! */
! 2454: }
! 2455: } /* for each slot */
! 2456: } /* if kick */
! 2457:
! 2458:
! 2459: /*******************
! 2460: * recv interrupts *
! 2461: ******************/
! 2462:
! 2463: /*
! 2464: * check for RX DMA complete, and pass the data "upstairs"
! 2465: */
! 2466:
! 2467: if (reg & MID_INT_DMA_RX) {
! 2468: val = EN_READ(sc, MID_DMA_RDRX); /* chip's current location */
! 2469: idx = MID_DRQ_A2REG(sc->drq_chip);/* where we last saw chip */
! 2470: while (idx != val) {
! 2471: sc->drq_free++;
! 2472: if ((drq = sc->drq[idx]) != 0) {
! 2473: sc->drq[idx] = 0; /* don't forget to zero it out when done */
! 2474: slot = EN_DQ_SLOT(drq);
! 2475: if (EN_DQ_LEN(drq) == 0) { /* "JK" trash DMA? */
! 2476: m = NULL;
! 2477: } else {
! 2478: IF_DEQUEUE(&sc->rxslot[slot].indma, m);
! 2479: if (!m) {
! 2480: panic("enintr: drqsync: %s: lost mbuf in slot %d!",
! 2481: sc->sc_dev.dv_xname, slot);
! 2482: }
! 2483: }
! 2484: /* do something with this mbuf */
! 2485: if (sc->rxslot[slot].oth_flags & ENOTHER_DRAIN) { /* drain? */
! 2486: if (m)
! 2487: m_freem(m);
! 2488: vci = sc->rxslot[slot].atm_vci;
! 2489: if (sc->rxslot[slot].indma.ifq_head == NULL &&
! 2490: sc->rxslot[slot].q.ifq_head == NULL &&
! 2491: (EN_READ(sc, MID_VC(vci)) & MIDV_INSERVICE) == 0 &&
! 2492: (sc->rxslot[slot].oth_flags & ENOTHER_SWSL) == 0) {
! 2493: sc->rxslot[slot].oth_flags = ENOTHER_FREE; /* done drain */
! 2494: sc->rxslot[slot].atm_vci = RX_NONE;
! 2495: sc->rxvc2slot[vci] = RX_NONE;
! 2496: #ifdef EN_DEBUG
! 2497: printf("%s: rx%d: VCI %d now free\n", sc->sc_dev.dv_xname,
! 2498: slot, vci);
! 2499: #endif
! 2500: }
! 2501: } else if (m != NULL) {
! 2502: ATM_PH_FLAGS(&ah) = sc->rxslot[slot].atm_flags;
! 2503: ATM_PH_VPI(&ah) = 0;
! 2504: ATM_PH_SETVCI(&ah, sc->rxslot[slot].atm_vci);
! 2505: #ifdef EN_DEBUG
! 2506: printf("%s: rx%d: rxvci%d: atm_input, mbuf %p, len %d, hand %p\n",
! 2507: sc->sc_dev.dv_xname, slot, sc->rxslot[slot].atm_vci, m,
! 2508: EN_DQ_LEN(drq), sc->rxslot[slot].rxhand);
! 2509: #endif
! 2510: sc->enif.if_ipackets++;
! 2511:
! 2512: #if NBPFILTER > 0
! 2513: if (sc->enif.if_bpf)
! 2514: bpf_mtap(sc->enif.if_bpf, m, BPF_DIRECTION_IN);
! 2515: #endif
! 2516:
! 2517: atm_input(&sc->enif, &ah, m, sc->rxslot[slot].rxhand);
! 2518: }
! 2519:
! 2520: }
! 2521: EN_WRAPADD(0, MID_DRQ_N, idx, 1);
! 2522: }
! 2523: sc->drq_chip = MID_DRQ_REG2A(val); /* sync softc */
! 2524:
! 2525: if (sc->need_drqs) { /* true if we had a DRQ shortage */
! 2526: need_softserv = 1;
! 2527: sc->need_drqs = 0;
! 2528: #ifdef EN_DEBUG
! 2529: printf("%s: cleared need DRQ condition\n", sc->sc_dev.dv_xname);
! 2530: #endif
! 2531: }
! 2532: }
! 2533:
! 2534: /*
! 2535: * handle service interrupts
! 2536: */
! 2537:
! 2538: if (reg & MID_INT_SERVICE) {
! 2539: chip = MID_SL_REG2A(EN_READ(sc, MID_SERV_WRITE));
! 2540:
! 2541: while (sc->hwslistp != chip) {
! 2542:
! 2543: /* fetch and remove it from hardware service list */
! 2544: vci = EN_READ(sc, sc->hwslistp);
! 2545: EN_WRAPADD(MID_SLOFF, MID_SLEND, sc->hwslistp, 4);/* advance hw ptr */
! 2546: slot = sc->rxvc2slot[vci];
! 2547: if (slot == RX_NONE) {
! 2548: #ifdef EN_DEBUG
! 2549: printf("%s: unexpected rx interrupt on VCI %d\n",
! 2550: sc->sc_dev.dv_xname, vci);
! 2551: #endif
! 2552: EN_WRITE(sc, MID_VC(vci), MIDV_TRASH); /* rx off, damn it! */
! 2553: continue; /* next */
! 2554: }
! 2555: EN_WRITE(sc, MID_VC(vci), sc->rxslot[slot].mode); /* remove from hwsl */
! 2556: EN_COUNT(sc->hwpull);
! 2557:
! 2558: #ifdef EN_DEBUG
! 2559: printf("%s: pulled VCI %d off hwslist\n", sc->sc_dev.dv_xname, vci);
! 2560: #endif
! 2561:
! 2562: /* add it to the software service list (if needed) */
! 2563: if ((sc->rxslot[slot].oth_flags & ENOTHER_SWSL) == 0) {
! 2564: EN_COUNT(sc->swadd);
! 2565: need_softserv = 1;
! 2566: sc->rxslot[slot].oth_flags |= ENOTHER_SWSL;
! 2567: sc->swslist[sc->swsl_tail] = slot;
! 2568: EN_WRAPADD(0, MID_SL_N, sc->swsl_tail, 1);
! 2569: sc->swsl_size++;
! 2570: #ifdef EN_DEBUG
! 2571: printf("%s: added VCI %d to swslist\n", sc->sc_dev.dv_xname, vci);
! 2572: #endif
! 2573: }
! 2574: }
! 2575: }
! 2576:
! 2577: /*
! 2578: * now service (function too big to include here)
! 2579: */
! 2580:
! 2581: if (need_softserv)
! 2582: en_service(sc);
! 2583:
! 2584: /*
! 2585: * keep our stats
! 2586: */
! 2587:
! 2588: if (reg & MID_INT_DMA_OVR) {
! 2589: EN_COUNT(sc->dmaovr);
! 2590: #ifdef EN_DEBUG
! 2591: printf("%s: MID_INT_DMA_OVR\n", sc->sc_dev.dv_xname);
! 2592: #endif
! 2593: }
! 2594: reg = EN_READ(sc, MID_STAT);
! 2595: #ifdef EN_STAT
! 2596: sc->otrash += MID_OTRASH(reg);
! 2597: sc->vtrash += MID_VTRASH(reg);
! 2598: #endif
! 2599:
! 2600: EN_INTR_RET(1); /* for us */
! 2601: }
! 2602:
! 2603:
! 2604: /*
! 2605: * en_service: handle a service interrupt
! 2606: *
! 2607: * Q: why do we need a software service list?
! 2608: *
! 2609: * A: if we remove a VCI from the hardware list and we find that we are
! 2610: * out of DRQs we must defer processing until some DRQs become free.
! 2611: * so we must remember to look at this RX VCI/slot later, but we can't
! 2612: * put it back on the hardware service list (since that isn't allowed).
! 2613: * so we instead save it on the software service list. it would be nice
! 2614: * if we could peek at the VCI on top of the hwservice list without removing
! 2615: * it, however this leads to a race condition: if we peek at it and
! 2616: * decide we are done with it new data could come in before we have a
! 2617: * chance to remove it from the hwslist. by the time we get it out of
! 2618: * the list the interrupt for the new data will be lost. oops!
! 2619: *
! 2620: */
! 2621:
! 2622: STATIC void en_service(sc)
! 2623:
! 2624: struct en_softc *sc;
! 2625:
! 2626: {
! 2627: struct mbuf *m, *tmp;
! 2628: u_int32_t cur, dstart, rbd, pdu, *sav, dma, bcode, count, *data, *datastop;
! 2629: u_int32_t start, stop, cnt, needalign;
! 2630: int slot, raw, aal5, llc, vci, fill, mlen, tlen, drqneed, need, needfill, end;
! 2631:
! 2632: aal5 = 0; /* Silence gcc */
! 2633: next_vci:
! 2634: if (sc->swsl_size == 0) {
! 2635: #ifdef EN_DEBUG
! 2636: printf("%s: en_service done\n", sc->sc_dev.dv_xname);
! 2637: #endif
! 2638: return; /* >>> exit here if swsl now empty <<< */
! 2639: }
! 2640:
! 2641: /*
! 2642: * get slot/vci to service
! 2643: */
! 2644:
! 2645: slot = sc->swslist[sc->swsl_head];
! 2646: vci = sc->rxslot[slot].atm_vci;
! 2647: #ifdef EN_DIAG
! 2648: if (sc->rxvc2slot[vci] != slot) panic("en_service rx slot/vci sync");
! 2649: #endif
! 2650:
! 2651: /*
! 2652: * determine our mode and if we've got any work to do
! 2653: */
! 2654:
! 2655: raw = sc->rxslot[slot].oth_flags & ENOTHER_RAW;
! 2656: start= sc->rxslot[slot].start;
! 2657: stop= sc->rxslot[slot].stop;
! 2658: cur = sc->rxslot[slot].cur;
! 2659:
! 2660: #ifdef EN_DEBUG
! 2661: printf("%s: rx%d: service vci=%d raw=%d start/stop/cur=0x%x 0x%x 0x%x\n",
! 2662: sc->sc_dev.dv_xname, slot, vci, raw, start, stop, cur);
! 2663: #endif
! 2664:
! 2665: same_vci:
! 2666: dstart = MIDV_DSTART(EN_READ(sc, MID_DST_RP(vci)));
! 2667: dstart = (dstart * sizeof(u_int32_t)) + start;
! 2668:
! 2669: /* check to see if there is any data at all */
! 2670: if (dstart == cur) {
! 2671: defer: /* defer processing */
! 2672: EN_WRAPADD(0, MID_SL_N, sc->swsl_head, 1);
! 2673: sc->rxslot[slot].oth_flags &= ~ENOTHER_SWSL;
! 2674: sc->swsl_size--;
! 2675: /* >>> remove from swslist <<< */
! 2676: #ifdef EN_DEBUG
! 2677: printf("%s: rx%d: remove vci %d from swslist\n",
! 2678: sc->sc_dev.dv_xname, slot, vci);
! 2679: #endif
! 2680: goto next_vci;
! 2681: }
! 2682:
! 2683: /*
! 2684: * figure out how many bytes we need
! 2685: * [mlen = # bytes to go in mbufs, fill = # bytes to dump (MIDDMA_JK)]
! 2686: */
! 2687:
! 2688: if (raw) {
! 2689:
! 2690: /* raw mode (aka boodi mode) */
! 2691: fill = 0;
! 2692: if (dstart > cur)
! 2693: mlen = dstart - cur;
! 2694: else
! 2695: mlen = (dstart + (EN_RXSZ*1024)) - cur;
! 2696:
! 2697: if (mlen < sc->rxslot[slot].raw_threshold)
! 2698: goto defer; /* too little data to deal with */
! 2699:
! 2700: } else {
! 2701:
! 2702: /* normal mode */
! 2703: aal5 = (sc->rxslot[slot].atm_flags & ATM_PH_AAL5);
! 2704: llc = (aal5 && (sc->rxslot[slot].atm_flags & ATM_PH_LLCSNAP)) ? 1 : 0;
! 2705: rbd = EN_READ(sc, cur);
! 2706: if (MID_RBD_ID(rbd) != MID_RBD_STDID)
! 2707: panic("en_service: id mismatch");
! 2708:
! 2709: if (rbd & MID_RBD_T) {
! 2710: mlen = 0; /* we've got trash */
! 2711: fill = MID_RBD_SIZE;
! 2712: EN_COUNT(sc->ttrash);
! 2713: } else if (!aal5) {
! 2714: mlen = MID_RBD_SIZE + MID_CHDR_SIZE + MID_ATMDATASZ; /* 1 cell (ick!) */
! 2715: fill = 0;
! 2716: } else {
! 2717: tlen = (MID_RBD_CNT(rbd) * MID_ATMDATASZ) + MID_RBD_SIZE;
! 2718: pdu = cur + tlen - MID_PDU_SIZE;
! 2719: if (pdu >= stop)
! 2720: pdu -= (EN_RXSZ*1024);
! 2721: pdu = EN_READ(sc, pdu); /* get PDU in correct byte order */
! 2722: fill = tlen - MID_RBD_SIZE - MID_PDU_LEN(pdu);
! 2723: if (fill < 0 || (rbd & MID_RBD_CRCERR) != 0) {
! 2724: printf("%s: %s, dropping frame\n", sc->sc_dev.dv_xname,
! 2725: (rbd & MID_RBD_CRCERR) ? "CRC error" : "invalid AAL5 PDU length");
! 2726: printf("%s: got %d cells (%d bytes), AAL5 len is %d bytes (pdu=0x%x)\n",
! 2727: sc->sc_dev.dv_xname, MID_RBD_CNT(rbd), tlen - MID_RBD_SIZE,
! 2728: MID_PDU_LEN(pdu), pdu);
! 2729: fill = tlen;
! 2730: }
! 2731: mlen = tlen - fill;
! 2732: }
! 2733:
! 2734: }
! 2735:
! 2736: /*
! 2737: * now allocate mbufs for mlen bytes of data, if out of mbufs, trash all
! 2738: *
! 2739: * notes:
! 2740: * 1. it is possible that we've already allocated an mbuf for this pkt
! 2741: * but ran out of DRQs, in which case we saved the allocated mbuf on
! 2742: * "q".
! 2743: * 2. if we save an mbuf in "q" we store the "cur" (pointer) in the front
! 2744: * of the mbuf as an identity (that we can check later), and we also
! 2745: * store drqneed (so we don't have to recompute it).
! 2746: * 3. after this block of code, if m is still NULL then we ran out of mbufs
! 2747: */
! 2748:
! 2749: m = sc->rxslot[slot].q.ifq_head;
! 2750: drqneed = 1;
! 2751: if (m) {
! 2752: sav = mtod(m, u_int32_t *);
! 2753: if (sav[0] != cur) {
! 2754: #ifdef EN_DEBUG
! 2755: printf("%s: rx%d: q'ed mbuf %p not ours\n",
! 2756: sc->sc_dev.dv_xname, slot, m);
! 2757: #endif
! 2758: m = NULL; /* wasn't ours */
! 2759: EN_COUNT(sc->rxqnotus);
! 2760: } else {
! 2761: EN_COUNT(sc->rxqus);
! 2762: IF_DEQUEUE(&sc->rxslot[slot].q, m);
! 2763: drqneed = sav[1];
! 2764: #ifdef EN_DEBUG
! 2765: printf("%s: rx%d: recovered q'ed mbuf %p (drqneed=%d)\n",
! 2766: sc->sc_dev.dv_xname, slot, m, drqneed);
! 2767: #endif
! 2768: }
! 2769: }
! 2770:
! 2771: if (mlen != 0 && m == NULL) {
! 2772: m = en_mget(sc, mlen, &drqneed); /* allocate! */
! 2773: if (m == NULL) {
! 2774: fill += mlen;
! 2775: mlen = 0;
! 2776: EN_COUNT(sc->rxmbufout);
! 2777: #ifdef EN_DEBUG
! 2778: printf("%s: rx%d: out of mbufs\n", sc->sc_dev.dv_xname, slot);
! 2779: #endif
! 2780: }
! 2781: #ifdef EN_DEBUG
! 2782: printf("%s: rx%d: allocate mbuf %p, mlen=%d, drqneed=%d\n",
! 2783: sc->sc_dev.dv_xname, slot, m, mlen, drqneed);
! 2784: #endif
! 2785: }
! 2786:
! 2787: #ifdef EN_DEBUG
! 2788: printf("%s: rx%d: VCI %d, mbuf_chain %p, mlen %d, fill %d\n",
! 2789: sc->sc_dev.dv_xname, slot, vci, m, mlen, fill);
! 2790: #endif
! 2791:
! 2792: /*
! 2793: * now check to see if we've got the DRQs needed. if we are out of
! 2794: * DRQs we must quit (saving our mbuf, if we've got one).
! 2795: */
! 2796:
! 2797: needfill = (fill) ? 1 : 0;
! 2798: if (drqneed + needfill > sc->drq_free) {
! 2799: sc->need_drqs = 1; /* flag condition */
! 2800: if (m == NULL) {
! 2801: EN_COUNT(sc->rxoutboth);
! 2802: #ifdef EN_DEBUG
! 2803: printf("%s: rx%d: out of DRQs *and* mbufs!\n", sc->sc_dev.dv_xname, slot);
! 2804: #endif
! 2805: return; /* >>> exit here if out of both mbufs and DRQs <<< */
! 2806: }
! 2807: sav = mtod(m, u_int32_t *);
! 2808: sav[0] = cur;
! 2809: sav[1] = drqneed;
! 2810: IF_ENQUEUE(&sc->rxslot[slot].q, m);
! 2811: EN_COUNT(sc->rxdrqout);
! 2812: #ifdef EN_DEBUG
! 2813: printf("%s: rx%d: out of DRQs\n", sc->sc_dev.dv_xname, slot);
! 2814: #endif
! 2815: return; /* >>> exit here if out of DRQs <<< */
! 2816: }
! 2817:
! 2818: /*
! 2819: * at this point all resources have been allocated and we are commited
! 2820: * to servicing this slot.
! 2821: *
! 2822: * dma = last location we told chip about
! 2823: * cur = current location
! 2824: * mlen = space in the mbuf we want
! 2825: * need = bytes to xfer in (decrs to zero)
! 2826: * fill = how much fill we need
! 2827: * tlen = how much data to transfer to this mbuf
! 2828: * cnt/bcode/count = <same as xmit>
! 2829: *
! 2830: * 'needfill' not used after this point
! 2831: */
! 2832:
! 2833: dma = cur; /* dma = last location we told chip about */
! 2834: need = roundup(mlen, sizeof(u_int32_t));
! 2835: fill = fill - (need - mlen); /* note: may invalidate 'needfill' */
! 2836:
! 2837: for (tmp = m ; tmp != NULL && need > 0 ; tmp = tmp->m_next) {
! 2838: tlen = roundup(tmp->m_len, sizeof(u_int32_t)); /* m_len set by en_mget */
! 2839: data = mtod(tmp, u_int32_t *);
! 2840:
! 2841: #ifdef EN_DEBUG
! 2842: printf("%s: rx%d: load mbuf %p, m_len=%d, m_data=%p, tlen=%d\n",
! 2843: sc->sc_dev.dv_xname, slot, tmp, tmp->m_len, tmp->m_data, tlen);
! 2844: #endif
! 2845:
! 2846: /* copy data */
! 2847: if (EN_NORXDMA || !en_dma || tlen < EN_MINDMA) {
! 2848: datastop = (u_int32_t *)((u_char *) data + tlen);
! 2849: /* copy loop: preserve byte order!!! use READDAT */
! 2850: while (data != datastop) {
! 2851: *data = EN_READDAT(sc, cur);
! 2852: data++;
! 2853: EN_WRAPADD(start, stop, cur, 4);
! 2854: }
! 2855: need -= tlen;
! 2856: #ifdef EN_DEBUG
! 2857: printf("%s: rx%d: vci%d: copied %d bytes (%d left)\n",
! 2858: sc->sc_dev.dv_xname, slot, vci, tlen, need);
! 2859: #endif
! 2860: continue;
! 2861: }
! 2862:
! 2863: /* DMA data (check to see if we need to sync DRQ first) */
! 2864: if (dma != cur) {
! 2865: EN_DRQADD(sc, WORD_IDX(start,cur), vci, MIDDMA_JK, 0, 0, 0, 0);
! 2866: #ifdef EN_DEBUG
! 2867: printf("%s: rx%d: vci%d: drq_sync: advance pointer to %d\n",
! 2868: sc->sc_dev.dv_xname, slot, vci, cur);
! 2869: #endif
! 2870: }
! 2871:
! 2872: #if !defined(MIDWAY_ENIONLY)
! 2873:
! 2874: /*
! 2875: * the adaptec DMA engine is smart and handles everything for us.
! 2876: */
! 2877:
! 2878: if (sc->is_adaptec) {
! 2879: need -= tlen;
! 2880: EN_WRAPADD(start, stop, cur, tlen);
! 2881: #ifdef EN_DEBUG
! 2882: printf("%s: rx%d: vci%d: adp_dma %d bytes (%d left)\n",
! 2883: sc->sc_dev.dv_xname, slot, vci, tlen, need);
! 2884: #endif
! 2885: end = (need == 0 && !fill) ? MID_DMA_END : 0;
! 2886: EN_DRQADD(sc, tlen, vci, 0, vtophys(data), mlen, slot, end);
! 2887: if (end)
! 2888: goto done;
! 2889: dma = cur; /* update dma pointer */
! 2890: continue;
! 2891: }
! 2892: #endif /* !MIDWAY_ENIONLY */
! 2893:
! 2894:
! 2895: #if !defined(MIDWAY_ADPONLY)
! 2896:
! 2897: /*
! 2898: * the ENI DMA engine is not so smart and need more help from us
! 2899: */
! 2900:
! 2901: /* do we need to do a DMA op to align? */
! 2902: if (sc->alburst &&
! 2903: (needalign = (((unsigned long) data) & sc->bestburstmask)) != 0) {
! 2904: cnt = sc->bestburstlen - needalign;
! 2905: if (cnt > tlen) {
! 2906: cnt = tlen;
! 2907: count = cnt / sizeof(u_int32_t);
! 2908: bcode = MIDDMA_WORD;
! 2909: } else {
! 2910: count = cnt / sizeof(u_int32_t);
! 2911: bcode = en_dmaplan[count].bcode;
! 2912: count = cnt >> en_dmaplan[count].divshift;
! 2913: }
! 2914: need -= cnt;
! 2915: EN_WRAPADD(start, stop, cur, cnt);
! 2916: #ifdef EN_DEBUG
! 2917: printf("%s: rx%d: vci%d: al_dma %d bytes (%d left)\n",
! 2918: sc->sc_dev.dv_xname, slot, vci, cnt, need);
! 2919: #endif
! 2920: tlen -= cnt;
! 2921: end = (need == 0 && !fill) ? MID_DMA_END : 0;
! 2922: EN_DRQADD(sc, count, vci, bcode, vtophys(data), mlen, slot, end);
! 2923: if (end)
! 2924: goto done;
! 2925: data = (u_int32_t *)((u_char *) data + cnt);
! 2926: }
! 2927:
! 2928: /* do we need a max-sized burst? */
! 2929: if (tlen >= sc->bestburstlen) {
! 2930: count = tlen >> sc->bestburstshift;
! 2931: cnt = count << sc->bestburstshift;
! 2932: bcode = sc->bestburstcode;
! 2933: need -= cnt;
! 2934: EN_WRAPADD(start, stop, cur, cnt);
! 2935: #ifdef EN_DEBUG
! 2936: printf("%s: rx%d: vci%d: best_dma %d bytes (%d left)\n",
! 2937: sc->sc_dev.dv_xname, slot, vci, cnt, need);
! 2938: #endif
! 2939: tlen -= cnt;
! 2940: end = (need == 0 && !fill) ? MID_DMA_END : 0;
! 2941: EN_DRQADD(sc, count, vci, bcode, vtophys(data), mlen, slot, end);
! 2942: if (end)
! 2943: goto done;
! 2944: data = (u_int32_t *)((u_char *) data + cnt);
! 2945: }
! 2946:
! 2947: /* do we need to do a cleanup burst? */
! 2948: if (tlen) {
! 2949: count = tlen / sizeof(u_int32_t);
! 2950: bcode = en_dmaplan[count].bcode;
! 2951: count = tlen >> en_dmaplan[count].divshift;
! 2952: need -= tlen;
! 2953: EN_WRAPADD(start, stop, cur, tlen);
! 2954: #ifdef EN_DEBUG
! 2955: printf("%s: rx%d: vci%d: cleanup_dma %d bytes (%d left)\n",
! 2956: sc->sc_dev.dv_xname, slot, vci, tlen, need);
! 2957: #endif
! 2958: end = (need == 0 && !fill) ? MID_DMA_END : 0;
! 2959: EN_DRQADD(sc, count, vci, bcode, vtophys(data), mlen, slot, end);
! 2960: if (end)
! 2961: goto done;
! 2962: }
! 2963:
! 2964: dma = cur; /* update dma pointer */
! 2965:
! 2966: #endif /* !MIDWAY_ADPONLY */
! 2967:
! 2968: }
! 2969:
! 2970: /* skip the end */
! 2971: if (fill || dma != cur) {
! 2972: #ifdef EN_DEBUG
! 2973: if (fill)
! 2974: printf("%s: rx%d: vci%d: skipping %d bytes of fill\n",
! 2975: sc->sc_dev.dv_xname, slot, vci, fill);
! 2976: else
! 2977: printf("%s: rx%d: vci%d: syncing chip from 0x%x to 0x%x [cur]\n",
! 2978: sc->sc_dev.dv_xname, slot, vci, dma, cur);
! 2979: #endif
! 2980: EN_WRAPADD(start, stop, cur, fill);
! 2981: EN_DRQADD(sc, WORD_IDX(start,cur), vci, MIDDMA_JK, 0, mlen,
! 2982: slot, MID_DMA_END);
! 2983: /* dma = cur; */ /* not necessary since we are done */
! 2984: }
! 2985:
! 2986: /*
! 2987: * done, remove stuff we don't want to pass up:
! 2988: * raw mode (boodi mode): pass everything up for later processing
! 2989: * aal5: remove RBD
! 2990: * aal0: remove RBD + cell header
! 2991: */
! 2992:
! 2993: done:
! 2994: if (m) {
! 2995: if (!raw) {
! 2996: cnt = MID_RBD_SIZE;
! 2997: if (!aal5) cnt += MID_CHDR_SIZE;
! 2998: m->m_len -= cnt; /* chop! */
! 2999: m->m_pkthdr.len -= cnt;
! 3000: m->m_data += cnt;
! 3001: }
! 3002: IF_ENQUEUE(&sc->rxslot[slot].indma, m);
! 3003: }
! 3004: sc->rxslot[slot].cur = cur; /* update master copy of 'cur' */
! 3005:
! 3006: #ifdef EN_DEBUG
! 3007: printf("%s: rx%d: vci%d: DONE! cur now =0x%x\n",
! 3008: sc->sc_dev.dv_xname, slot, vci, cur);
! 3009: #endif
! 3010:
! 3011: goto same_vci; /* get next packet in this slot */
! 3012: }
! 3013:
! 3014:
! 3015: #ifdef EN_DDBHOOK
! 3016: /*
! 3017: * functions we can call from ddb
! 3018: */
! 3019:
! 3020: /*
! 3021: * en_dump: dump the state
! 3022: */
! 3023:
! 3024: #define END_SWSL 0x00000040 /* swsl state */
! 3025: #define END_DRQ 0x00000020 /* drq state */
! 3026: #define END_DTQ 0x00000010 /* dtq state */
! 3027: #define END_RX 0x00000008 /* rx state */
! 3028: #define END_TX 0x00000004 /* tx state */
! 3029: #define END_MREGS 0x00000002 /* registers */
! 3030: #define END_STATS 0x00000001 /* dump stats */
! 3031:
! 3032: #define END_BITS "\20\7SWSL\6DRQ\5DTQ\4RX\3TX\2MREGS\1STATS"
! 3033:
! 3034: int en_dump(unit, level)
! 3035:
! 3036: int unit, level;
! 3037:
! 3038: {
! 3039: struct en_softc *sc;
! 3040: int lcv, cnt, slot;
! 3041: u_int32_t ptr, reg;
! 3042:
! 3043: for (lcv = 0 ; lcv < en_cd.cd_ndevs ; lcv++) {
! 3044: sc = (struct en_softc *) en_cd.cd_devs[lcv];
! 3045: if (sc == NULL) continue;
! 3046: if (unit != -1 && unit != lcv)
! 3047: continue;
! 3048:
! 3049: printf("dumping device %s at level 0x%b\n", sc->sc_dev.dv_xname, level,
! 3050: END_BITS);
! 3051:
! 3052: if (sc->dtq_us == 0) {
! 3053: printf("<hasn't been en_init'd yet>\n");
! 3054: continue;
! 3055: }
! 3056:
! 3057: if (level & END_STATS) {
! 3058: printf(" en_stats:\n");
! 3059: printf(" %d mfix (%d failed); %d/%d head/tail byte DMAs, %d flushes\n",
! 3060: sc->mfix, sc->mfixfail, sc->headbyte, sc->tailbyte, sc->tailflush);
! 3061: printf(" %d rx dma overflow interrupts\n", sc->dmaovr);
! 3062: printf(" %d times we ran out of TX space and stalled\n",
! 3063: sc->txoutspace);
! 3064: printf(" %d times we ran out of DTQs\n", sc->txdtqout);
! 3065: printf(" %d times we launched a packet\n", sc->launch);
! 3066: printf(" %d times we launched without on-board header\n", sc->lheader);
! 3067: printf(" %d times we launched without on-board tail\n", sc->ltail);
! 3068: printf(" %d times we pulled the hw service list\n", sc->hwpull);
! 3069: printf(" %d times we pushed a vci on the sw service list\n",
! 3070: sc->swadd);
! 3071: printf(" %d times RX pulled an mbuf from Q that wasn't ours\n",
! 3072: sc->rxqnotus);
! 3073: printf(" %d times RX pulled a good mbuf from Q\n", sc->rxqus);
! 3074: printf(" %d times we ran out of mbufs *and* DRQs\n", sc->rxoutboth);
! 3075: printf(" %d times we ran out of DRQs\n", sc->rxdrqout);
! 3076:
! 3077: printf(" %d transmit packets dropped due to mbsize\n", sc->txmbovr);
! 3078: printf(" %d cells trashed due to turned off rxvc\n", sc->vtrash);
! 3079: printf(" %d cells trashed due to totally full buffer\n", sc->otrash);
! 3080: printf(" %d cells trashed due almost full buffer\n", sc->ttrash);
! 3081: printf(" %d rx mbuf allocation failures\n", sc->rxmbufout);
! 3082: #ifdef NATM
! 3083: printf(" %d drops at natmintrq\n", natmintrq.ifq_drops);
! 3084: #ifdef NATM_STAT
! 3085: printf(" natmintr so_rcv: ok/drop cnt: %d/%d, ok/drop bytes: %d/%d\n",
! 3086: natm_sookcnt, natm_sodropcnt, natm_sookbytes, natm_sodropbytes);
! 3087: #endif
! 3088: #endif
! 3089: }
! 3090:
! 3091: if (level & END_MREGS) {
! 3092: printf("mregs:\n");
! 3093: printf("resid = 0x%x\n", EN_READ(sc, MID_RESID));
! 3094: printf("interrupt status = 0x%b\n",
! 3095: EN_READ(sc, MID_INTSTAT), MID_INTBITS);
! 3096: printf("interrupt enable = 0x%b\n",
! 3097: EN_READ(sc, MID_INTENA), MID_INTBITS);
! 3098: printf("mcsr = 0x%b\n", EN_READ(sc, MID_MAST_CSR), MID_MCSRBITS);
! 3099: printf("serv_write = [chip=%d] [us=%d]\n", EN_READ(sc, MID_SERV_WRITE),
! 3100: MID_SL_A2REG(sc->hwslistp));
! 3101: printf("dma addr = 0x%x\n", EN_READ(sc, MID_DMA_ADDR));
! 3102: printf("DRQ: chip[rd=0x%x,wr=0x%x], sc[chip=0x%x,us=0x%x]\n",
! 3103: MID_DRQ_REG2A(EN_READ(sc, MID_DMA_RDRX)),
! 3104: MID_DRQ_REG2A(EN_READ(sc, MID_DMA_WRRX)), sc->drq_chip, sc->drq_us);
! 3105: printf("DTQ: chip[rd=0x%x,wr=0x%x], sc[chip=0x%x,us=0x%x]\n",
! 3106: MID_DTQ_REG2A(EN_READ(sc, MID_DMA_RDTX)),
! 3107: MID_DTQ_REG2A(EN_READ(sc, MID_DMA_WRTX)), sc->dtq_chip, sc->dtq_us);
! 3108:
! 3109: printf(" unusal txspeeds: ");
! 3110: for (cnt = 0 ; cnt < MID_N_VC ; cnt++)
! 3111: if (sc->txspeed[cnt])
! 3112: printf(" vci%d=0x%x", cnt, sc->txspeed[cnt]);
! 3113: printf("\n");
! 3114:
! 3115: printf(" rxvc slot mappings: ");
! 3116: for (cnt = 0 ; cnt < MID_N_VC ; cnt++)
! 3117: if (sc->rxvc2slot[cnt] != RX_NONE)
! 3118: printf(" %d->%d", cnt, sc->rxvc2slot[cnt]);
! 3119: printf("\n");
! 3120:
! 3121: }
! 3122:
! 3123: if (level & END_TX) {
! 3124: printf("tx:\n");
! 3125: for (slot = 0 ; slot < EN_NTX; slot++) {
! 3126: printf("tx%d: start/stop/cur=0x%x/0x%x/0x%x [%d] ", slot,
! 3127: sc->txslot[slot].start, sc->txslot[slot].stop, sc->txslot[slot].cur,
! 3128: (sc->txslot[slot].cur - sc->txslot[slot].start)/4);
! 3129: printf("mbsize=%d, bfree=%d\n", sc->txslot[slot].mbsize,
! 3130: sc->txslot[slot].bfree);
! 3131: printf("txhw: base_address=0x%x, size=%d, read=%d, descstart=%d\n",
! 3132: MIDX_BASE(EN_READ(sc, MIDX_PLACE(slot))),
! 3133: MIDX_SZ(EN_READ(sc, MIDX_PLACE(slot))),
! 3134: EN_READ(sc, MIDX_READPTR(slot)), EN_READ(sc, MIDX_DESCSTART(slot)));
! 3135: }
! 3136: }
! 3137:
! 3138: if (level & END_RX) {
! 3139: printf(" recv slots:\n");
! 3140: for (slot = 0 ; slot < sc->en_nrx; slot++) {
! 3141: printf("rx%d: vci=%d: start/stop/cur=0x%x/0x%x/0x%x ", slot,
! 3142: sc->rxslot[slot].atm_vci, sc->rxslot[slot].start,
! 3143: sc->rxslot[slot].stop, sc->rxslot[slot].cur);
! 3144: printf("mode=0x%x, atm_flags=0x%x, oth_flags=0x%x\n",
! 3145: sc->rxslot[slot].mode, sc->rxslot[slot].atm_flags,
! 3146: sc->rxslot[slot].oth_flags);
! 3147: printf("RXHW: mode=0x%x, DST_RP=0x%x, WP_ST_CNT=0x%x\n",
! 3148: EN_READ(sc, MID_VC(sc->rxslot[slot].atm_vci)),
! 3149: EN_READ(sc, MID_DST_RP(sc->rxslot[slot].atm_vci)),
! 3150: EN_READ(sc, MID_WP_ST_CNT(sc->rxslot[slot].atm_vci)));
! 3151: }
! 3152: }
! 3153:
! 3154: if (level & END_DTQ) {
! 3155: printf(" dtq [need_dtqs=%d,dtq_free=%d]:\n",
! 3156: sc->need_dtqs, sc->dtq_free);
! 3157: ptr = sc->dtq_chip;
! 3158: while (ptr != sc->dtq_us) {
! 3159: reg = EN_READ(sc, ptr);
! 3160: printf("\t0x%x=[cnt=%d, chan=%d, end=%d, type=%d @ 0x%x]\n",
! 3161: sc->dtq[MID_DTQ_A2REG(ptr)], MID_DMA_CNT(reg), MID_DMA_TXCHAN(reg),
! 3162: (reg & MID_DMA_END) != 0, MID_DMA_TYPE(reg), EN_READ(sc, ptr+4));
! 3163: EN_WRAPADD(MID_DTQOFF, MID_DTQEND, ptr, 8);
! 3164: }
! 3165: }
! 3166:
! 3167: if (level & END_DRQ) {
! 3168: printf(" drq [need_drqs=%d,drq_free=%d]:\n",
! 3169: sc->need_drqs, sc->drq_free);
! 3170: ptr = sc->drq_chip;
! 3171: while (ptr != sc->drq_us) {
! 3172: reg = EN_READ(sc, ptr);
! 3173: printf("\t0x%x=[cnt=%d, chan=%d, end=%d, type=%d @ 0x%x]\n",
! 3174: sc->drq[MID_DRQ_A2REG(ptr)], MID_DMA_CNT(reg), MID_DMA_RXVCI(reg),
! 3175: (reg & MID_DMA_END) != 0, MID_DMA_TYPE(reg), EN_READ(sc, ptr+4));
! 3176: EN_WRAPADD(MID_DRQOFF, MID_DRQEND, ptr, 8);
! 3177: }
! 3178: }
! 3179:
! 3180: if (level & END_SWSL) {
! 3181: printf(" swslist [size=%d]: ", sc->swsl_size);
! 3182: for (cnt = sc->swsl_head ; cnt != sc->swsl_tail ;
! 3183: cnt = (cnt + 1) % MID_SL_N)
! 3184: printf("0x%x ", sc->swslist[cnt]);
! 3185: printf("\n");
! 3186: }
! 3187:
! 3188: }
! 3189: return(0);
! 3190: }
! 3191:
! 3192: /*
! 3193: * en_dumpmem: dump the memory
! 3194: */
! 3195:
! 3196: int en_dumpmem(unit, addr, len)
! 3197:
! 3198: int unit, addr, len;
! 3199:
! 3200: {
! 3201: struct en_softc *sc;
! 3202: u_int32_t reg;
! 3203:
! 3204: if (unit < 0 || unit >= en_cd.cd_ndevs ||
! 3205: (sc = (struct en_softc *) en_cd.cd_devs[unit]) == NULL) {
! 3206: printf("invalid unit number: %d\n", unit);
! 3207: return(0);
! 3208: }
! 3209: addr = addr & ~3;
! 3210: if (addr < MID_RAMOFF || addr + len*4 > MID_MAXOFF || len <= 0) {
! 3211: printf("invalid addr/len number: %d, %d\n", addr, len);
! 3212: return(0);
! 3213: }
! 3214: printf("dumping %d words starting at offset 0x%x\n", len, addr);
! 3215: while (len--) {
! 3216: reg = EN_READ(sc, addr);
! 3217: printf("mem[0x%x] = 0x%x\n", addr, reg);
! 3218: addr += 4;
! 3219: }
! 3220: return(0);
! 3221: }
! 3222: #endif
! 3223:
! 3224:
! 3225: #endif /* NEN > 0 || !defined(__FreeBSD__) */
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