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cmd64x: don't clear the other channel's interrupt
[linux-2.6/linux-mips/linux-dm7025.git] / drivers / net / skfp / hwmtm.c
blob438f424e63611ca73f372aa74207713507d34bb5
1 /******************************************************************************
2 *
3 * (C)Copyright 1998,1999 SysKonnect,
4 * a business unit of Schneider & Koch & Co. Datensysteme GmbH.
5 *
6 * See the file "skfddi.c" for further information.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * The information in this file is provided "AS IS" without warranty.
14 *
15 ******************************************************************************/
16
17 #ifndef lint
18 static char const ID_sccs[] = "@(#)hwmtm.c 1.40 99/05/31 (C) SK" ;
19 #endif
20
21 #define HWMTM
22
23 #ifndef FDDI
24 #define FDDI
25 #endif
26
27 #include "h/types.h"
28 #include "h/fddi.h"
29 #include "h/smc.h"
30 #include "h/supern_2.h"
31 #include "h/skfbiinc.h"
32
33 /*
34 -------------------------------------------------------------
35 DOCUMENTATION
36 -------------------------------------------------------------
37 BEGIN_MANUAL_ENTRY(DOCUMENTATION)
38
39 T B D
40
41 END_MANUAL_ENTRY
42 */
43 /*
44 -------------------------------------------------------------
45 LOCAL VARIABLES:
46 -------------------------------------------------------------
47 */
48 #ifdef COMMON_MB_POOL
49 static SMbuf *mb_start = 0 ;
50 static SMbuf *mb_free = 0 ;
51 static int mb_init = FALSE ;
52 static int call_count = 0 ;
53 #endif
54
55 /*
56 -------------------------------------------------------------
57 EXTERNE VARIABLES:
58 -------------------------------------------------------------
59 */
60
61 #ifdef DEBUG
62 #ifndef DEBUG_BRD
63 extern struct smt_debug debug ;
64 #endif
65 #endif
66
67 #ifdef NDIS_OS2
68 extern u_char offDepth ;
69 extern u_char force_irq_pending ;
70 #endif
71
72 /*
73 -------------------------------------------------------------
74 LOCAL FUNCTIONS:
75 -------------------------------------------------------------
76 */
77
78 static void queue_llc_rx(struct s_smc *smc, SMbuf *mb);
79 static void smt_to_llc(struct s_smc *smc, SMbuf *mb);
80 static void init_txd_ring(struct s_smc *smc);
81 static void init_rxd_ring(struct s_smc *smc);
82 static void queue_txd_mb(struct s_smc *smc, SMbuf *mb);
83 static u_long init_descr_ring(struct s_smc *smc, union s_fp_descr volatile *start,
84 int count);
85 static u_long repair_txd_ring(struct s_smc *smc, struct s_smt_tx_queue *queue);
86 static u_long repair_rxd_ring(struct s_smc *smc, struct s_smt_rx_queue *queue);
87 static SMbuf* get_llc_rx(struct s_smc *smc);
88 static SMbuf* get_txd_mb(struct s_smc *smc);
89 static void mac_drv_clear_txd(struct s_smc *smc);
90
91 /*
92 -------------------------------------------------------------
93 EXTERNAL FUNCTIONS:
94 -------------------------------------------------------------
95 */
96 /* The external SMT functions are listed in cmtdef.h */
97
98 extern void* mac_drv_get_space(struct s_smc *smc, unsigned int size);
99 extern void* mac_drv_get_desc_mem(struct s_smc *smc, unsigned int size);
100 extern void init_board(struct s_smc *smc, u_char *mac_addr);
101 extern void mac_drv_fill_rxd(struct s_smc *smc);
102 extern void plc1_irq(struct s_smc *smc);
103 extern void mac_drv_tx_complete(struct s_smc *smc,
104 volatile struct s_smt_fp_txd *txd);
105 extern void plc2_irq(struct s_smc *smc);
106 extern void mac1_irq(struct s_smc *smc, u_short stu, u_short stl);
107 extern void mac2_irq(struct s_smc *smc, u_short code_s2u, u_short code_s2l);
108 extern void mac3_irq(struct s_smc *smc, u_short code_s3u, u_short code_s3l);
109 extern void timer_irq(struct s_smc *smc);
110 extern void mac_drv_rx_complete(struct s_smc *smc,
111 volatile struct s_smt_fp_rxd *rxd,
112 int frag_count, int len);
113 extern void mac_drv_requeue_rxd(struct s_smc *smc,
114 volatile struct s_smt_fp_rxd *rxd,
115 int frag_count);
116 extern void init_plc(struct s_smc *smc);
117 extern void mac_drv_clear_rxd(struct s_smc *smc,
118 volatile struct s_smt_fp_rxd *rxd, int frag_count);
119
120 #ifdef USE_OS_CPY
121 extern void hwm_cpy_rxd2mb(void);
122 extern void hwm_cpy_txd2mb(void);
123 #endif
124
125 #ifdef ALL_RX_COMPLETE
126 extern void mac_drv_all_receives_complete(void);
127 #endif
128
129 extern u_long mac_drv_virt2phys(struct s_smc *smc, void *virt);
130 extern u_long dma_master(struct s_smc *smc, void *virt, int len, int flag);
131
132 #ifdef NDIS_OS2
133 extern void post_proc(void);
134 #else
135 extern void dma_complete(struct s_smc *smc, volatile union s_fp_descr *descr,
136 int flag);
137 #endif
138
139 extern int init_fplus(struct s_smc *smc);
140 extern int mac_drv_rx_init(struct s_smc *smc, int len, int fc, char *look_ahead,
141 int la_len);
142
143 /*
144 -------------------------------------------------------------
145 PUBLIC FUNCTIONS:
146 -------------------------------------------------------------
147 */
148 void process_receive(struct s_smc *smc);
149 void fddi_isr(struct s_smc *smc);
150 void smt_free_mbuf(struct s_smc *smc, SMbuf *mb);
151 void init_driver_fplus(struct s_smc *smc);
152 void mac_drv_rx_mode(struct s_smc *smc, int mode);
153 void init_fddi_driver(struct s_smc *smc, u_char *mac_addr);
154 void mac_drv_clear_tx_queue(struct s_smc *smc);
155 void mac_drv_clear_rx_queue(struct s_smc *smc);
156 void hwm_tx_frag(struct s_smc *smc, char far *virt, u_long phys, int len,
157 int frame_status);
158 void hwm_rx_frag(struct s_smc *smc, char far *virt, u_long phys, int len,
159 int frame_status);
160
161 int mac_drv_init(struct s_smc *smc);
162 int hwm_tx_init(struct s_smc *smc, u_char fc, int frag_count, int frame_len,
163 int frame_status);
164
165 u_int mac_drv_check_space(void);
166
167 SMbuf* smt_get_mbuf(struct s_smc *smc);
168
169 #ifdef DEBUG
170 void mac_drv_debug_lev(void);
171 #endif
172
173 /*
174 -------------------------------------------------------------
175 MACROS:
176 -------------------------------------------------------------
177 */
178 #ifndef UNUSED
179 #ifdef lint
180 #define UNUSED(x) (x) = (x)
181 #else
182 #define UNUSED(x)
183 #endif
184 #endif
185
186 #ifdef USE_CAN_ADDR
187 #define MA smc->hw.fddi_canon_addr.a
188 #define GROUP_ADDR_BIT 0x01
189 #else
190 #define MA smc->hw.fddi_home_addr.a
191 #define GROUP_ADDR_BIT 0x80
192 #endif
193
194 #define RXD_TXD_COUNT (HWM_ASYNC_TXD_COUNT+HWM_SYNC_TXD_COUNT+\
195 SMT_R1_RXD_COUNT+SMT_R2_RXD_COUNT)
196
197 #ifdef MB_OUTSIDE_SMC
198 #define EXT_VIRT_MEM ((RXD_TXD_COUNT+1)*sizeof(struct s_smt_fp_txd) +\
199 MAX_MBUF*sizeof(SMbuf))
200 #define EXT_VIRT_MEM_2 ((RXD_TXD_COUNT+1)*sizeof(struct s_smt_fp_txd))
201 #else
202 #define EXT_VIRT_MEM ((RXD_TXD_COUNT+1)*sizeof(struct s_smt_fp_txd))
203 #endif
204
205 /*
206 * define critical read for 16 Bit drivers
207 */
208 #if defined(NDIS_OS2) || defined(ODI2)
209 #define CR_READ(var) ((var) & 0xffff0000 | ((var) & 0xffff))
210 #else
211 #define CR_READ(var) (u_long)(var)
212 #endif
213
214 #define IMASK_SLOW (IS_PLINT1 | IS_PLINT2 | IS_TIMINT | IS_TOKEN | \
215 IS_MINTR1 | IS_MINTR2 | IS_MINTR3 | IS_R1_P | \
216 IS_R1_C | IS_XA_C | IS_XS_C)
217
218 /*
219 -------------------------------------------------------------
220 INIT- AND SMT FUNCTIONS:
221 -------------------------------------------------------------
222 */
223
224
225 /*
226 * BEGIN_MANUAL_ENTRY(mac_drv_check_space)
227 * u_int mac_drv_check_space()
228 *
229 * function DOWNCALL (drvsr.c)
230 * This function calculates the needed non virtual
231 * memory for MBufs, RxD and TxD descriptors etc.
232 * needed by the driver.
233 *
234 * return u_int memory in bytes
235 *
236 * END_MANUAL_ENTRY
237 */
238 u_int mac_drv_check_space(void)
239 {
240 #ifdef MB_OUTSIDE_SMC
241 #ifdef COMMON_MB_POOL
242 call_count++ ;
243 if (call_count == 1) {
244 return(EXT_VIRT_MEM) ;
245 }
246 else {
247 return(EXT_VIRT_MEM_2) ;
248 }
249 #else
250 return (EXT_VIRT_MEM) ;
251 #endif
252 #else
253 return (0) ;
254 #endif
255 }
256
257 /*
258 * BEGIN_MANUAL_ENTRY(mac_drv_init)
259 * void mac_drv_init(smc)
260 *
261 * function DOWNCALL (drvsr.c)
262 * In this function the hardware module allocates it's
263 * memory.
264 * The operating system dependent module should call
265 * mac_drv_init once, after the adatper is detected.
266 * END_MANUAL_ENTRY
267 */
268 int mac_drv_init(struct s_smc *smc)
269 {
270 if (sizeof(struct s_smt_fp_rxd) % 16) {
271 SMT_PANIC(smc,HWM_E0001,HWM_E0001_MSG) ;
272 }
273 if (sizeof(struct s_smt_fp_txd) % 16) {
274 SMT_PANIC(smc,HWM_E0002,HWM_E0002_MSG) ;
275 }
276
277 /*
278 * get the required memory for the RxDs and TxDs
279 */
280 if (!(smc->os.hwm.descr_p = (union s_fp_descr volatile *)
281 mac_drv_get_desc_mem(smc,(u_int)
282 (RXD_TXD_COUNT+1)*sizeof(struct s_smt_fp_txd)))) {
283 return(1) ; /* no space the hwm modul can't work */
284 }
285
286 /*
287 * get the memory for the SMT MBufs
288 */
289 #ifndef MB_OUTSIDE_SMC
290 smc->os.hwm.mbuf_pool.mb_start=(SMbuf *)(&smc->os.hwm.mbuf_pool.mb[0]) ;
291 #else
292 #ifndef COMMON_MB_POOL
293 if (!(smc->os.hwm.mbuf_pool.mb_start = (SMbuf *) mac_drv_get_space(smc,
294 MAX_MBUF*sizeof(SMbuf)))) {
295 return(1) ; /* no space the hwm modul can't work */
296 }
297 #else
298 if (!mb_start) {
299 if (!(mb_start = (SMbuf *) mac_drv_get_space(smc,
300 MAX_MBUF*sizeof(SMbuf)))) {
301 return(1) ; /* no space the hwm modul can't work */
302 }
303 }
304 #endif
305 #endif
306 return (0) ;
307 }
308
309 /*
310 * BEGIN_MANUAL_ENTRY(init_driver_fplus)
311 * init_driver_fplus(smc)
312 *
313 * Sets hardware modul specific values for the mode register 2
314 * (e.g. the byte alignment for the received frames, the position of the
315 * least significant byte etc.)
316 * END_MANUAL_ENTRY
317 */
318 void init_driver_fplus(struct s_smc *smc)
319 {
320 smc->hw.fp.mdr2init = FM_LSB | FM_BMMODE | FM_ENNPRQ | FM_ENHSRQ | 3 ;
321
322 #ifdef PCI
323 smc->hw.fp.mdr2init |= FM_CHKPAR | FM_PARITY ;
324 #endif
325 smc->hw.fp.mdr3init = FM_MENRQAUNLCK | FM_MENRS ;
326
327 #ifdef USE_CAN_ADDR
328 /* enable address bit swapping */
329 smc->hw.fp.frselreg_init = FM_ENXMTADSWAP | FM_ENRCVADSWAP ;
330 #endif
331 }
332
333 static u_long init_descr_ring(struct s_smc *smc,
334 union s_fp_descr volatile *start,
335 int count)
336 {
337 int i ;
338 union s_fp_descr volatile *d1 ;
339 union s_fp_descr volatile *d2 ;
340 u_long phys ;
341
342 DB_GEN("descr ring starts at = %x ",(void *)start,0,3) ;
343 for (i=count-1, d1=start; i ; i--) {
344 d2 = d1 ;
345 d1++ ; /* descr is owned by the host */
346 d2->r.rxd_rbctrl = AIX_REVERSE(BMU_CHECK) ;
347 d2->r.rxd_next = &d1->r ;
348 phys = mac_drv_virt2phys(smc,(void *)d1) ;
349 d2->r.rxd_nrdadr = AIX_REVERSE(phys) ;
350 }
351 DB_GEN("descr ring ends at = %x ",(void *)d1,0,3) ;
352 d1->r.rxd_rbctrl = AIX_REVERSE(BMU_CHECK) ;
353 d1->r.rxd_next = &start->r ;
354 phys = mac_drv_virt2phys(smc,(void *)start) ;
355 d1->r.rxd_nrdadr = AIX_REVERSE(phys) ;
356
357 for (i=count, d1=start; i ; i--) {
358 DRV_BUF_FLUSH(&d1->r,DDI_DMA_SYNC_FORDEV) ;
359 d1++;
360 }
361 return(phys) ;
362 }
363
364 static void init_txd_ring(struct s_smc *smc)
365 {
366 struct s_smt_fp_txd volatile *ds ;
367 struct s_smt_tx_queue *queue ;
368 u_long phys ;
369
370 /*
371 * initialize the transmit descriptors
372 */
373 ds = (struct s_smt_fp_txd volatile *) ((char *)smc->os.hwm.descr_p +
374 SMT_R1_RXD_COUNT*sizeof(struct s_smt_fp_rxd)) ;
375 queue = smc->hw.fp.tx[QUEUE_A0] ;
376 DB_GEN("Init async TxD ring, %d TxDs ",HWM_ASYNC_TXD_COUNT,0,3) ;
377 (void)init_descr_ring(smc,(union s_fp_descr volatile *)ds,
378 HWM_ASYNC_TXD_COUNT) ;
379 phys = AIX_REVERSE(ds->txd_ntdadr) ;
380 ds++ ;
381 queue->tx_curr_put = queue->tx_curr_get = ds ;
382 ds-- ;
383 queue->tx_free = HWM_ASYNC_TXD_COUNT ;
384 queue->tx_used = 0 ;
385 outpd(ADDR(B5_XA_DA),phys) ;
386
387 ds = (struct s_smt_fp_txd volatile *) ((char *)ds +
388 HWM_ASYNC_TXD_COUNT*sizeof(struct s_smt_fp_txd)) ;
389 queue = smc->hw.fp.tx[QUEUE_S] ;
390 DB_GEN("Init sync TxD ring, %d TxDs ",HWM_SYNC_TXD_COUNT,0,3) ;
391 (void)init_descr_ring(smc,(union s_fp_descr volatile *)ds,
392 HWM_SYNC_TXD_COUNT) ;
393 phys = AIX_REVERSE(ds->txd_ntdadr) ;
394 ds++ ;
395 queue->tx_curr_put = queue->tx_curr_get = ds ;
396 queue->tx_free = HWM_SYNC_TXD_COUNT ;
397 queue->tx_used = 0 ;
398 outpd(ADDR(B5_XS_DA),phys) ;
399 }
400
401 static void init_rxd_ring(struct s_smc *smc)
402 {
403 struct s_smt_fp_rxd volatile *ds ;
404 struct s_smt_rx_queue *queue ;
405 u_long phys ;
406
407 /*
408 * initialize the receive descriptors
409 */
410 ds = (struct s_smt_fp_rxd volatile *) smc->os.hwm.descr_p ;
411 queue = smc->hw.fp.rx[QUEUE_R1] ;
412 DB_GEN("Init RxD ring, %d RxDs ",SMT_R1_RXD_COUNT,0,3) ;
413 (void)init_descr_ring(smc,(union s_fp_descr volatile *)ds,
414 SMT_R1_RXD_COUNT) ;
415 phys = AIX_REVERSE(ds->rxd_nrdadr) ;
416 ds++ ;
417 queue->rx_curr_put = queue->rx_curr_get = ds ;
418 queue->rx_free = SMT_R1_RXD_COUNT ;
419 queue->rx_used = 0 ;
420 outpd(ADDR(B4_R1_DA),phys) ;
421 }
422
423 /*
424 * BEGIN_MANUAL_ENTRY(init_fddi_driver)
425 * void init_fddi_driver(smc,mac_addr)
426 *
427 * initializes the driver and it's variables
428 *
429 * END_MANUAL_ENTRY
430 */
431 void init_fddi_driver(struct s_smc *smc, u_char *mac_addr)
432 {
433 SMbuf *mb ;
434 int i ;
435
436 init_board(smc,mac_addr) ;
437 (void)init_fplus(smc) ;
438
439 /*
440 * initialize the SMbufs for the SMT
441 */
442 #ifndef COMMON_MB_POOL
443 mb = smc->os.hwm.mbuf_pool.mb_start ;
444 smc->os.hwm.mbuf_pool.mb_free = (SMbuf *)NULL ;
445 for (i = 0; i < MAX_MBUF; i++) {
446 mb->sm_use_count = 1 ;
447 smt_free_mbuf(smc,mb) ;
448 mb++ ;
449 }
450 #else
451 mb = mb_start ;
452 if (!mb_init) {
453 mb_free = 0 ;
454 for (i = 0; i < MAX_MBUF; i++) {
455 mb->sm_use_count = 1 ;
456 smt_free_mbuf(smc,mb) ;
457 mb++ ;
458 }
459 mb_init = TRUE ;
460 }
461 #endif
462
463 /*
464 * initialize the other variables
465 */
466 smc->os.hwm.llc_rx_pipe = smc->os.hwm.llc_rx_tail = (SMbuf *)NULL ;
467 smc->os.hwm.txd_tx_pipe = smc->os.hwm.txd_tx_tail = NULL ;
468 smc->os.hwm.pass_SMT = smc->os.hwm.pass_NSA = smc->os.hwm.pass_DB = 0 ;
469 smc->os.hwm.pass_llc_promisc = TRUE ;
470 smc->os.hwm.queued_rx_frames = smc->os.hwm.queued_txd_mb = 0 ;
471 smc->os.hwm.detec_count = 0 ;
472 smc->os.hwm.rx_break = 0 ;
473 smc->os.hwm.rx_len_error = 0 ;
474 smc->os.hwm.isr_flag = FALSE ;
475
476 /*
477 * make sure that the start pointer is 16 byte aligned
478 */
479 i = 16 - ((long)smc->os.hwm.descr_p & 0xf) ;
480 if (i != 16) {
481 DB_GEN("i = %d",i,0,3) ;
482 smc->os.hwm.descr_p = (union s_fp_descr volatile *)
483 ((char *)smc->os.hwm.descr_p+i) ;
484 }
485 DB_GEN("pt to descr area = %x",(void *)smc->os.hwm.descr_p,0,3) ;
486
487 init_txd_ring(smc) ;
488 init_rxd_ring(smc) ;
489 mac_drv_fill_rxd(smc) ;
490
491 init_plc(smc) ;
492 }
493
494
495 SMbuf *smt_get_mbuf(struct s_smc *smc)
496 {
497 register SMbuf *mb ;
498
499 #ifndef COMMON_MB_POOL
500 mb = smc->os.hwm.mbuf_pool.mb_free ;
501 #else
502 mb = mb_free ;
503 #endif
504 if (mb) {
505 #ifndef COMMON_MB_POOL
506 smc->os.hwm.mbuf_pool.mb_free = mb->sm_next ;
507 #else
508 mb_free = mb->sm_next ;
509 #endif
510 mb->sm_off = 8 ;
511 mb->sm_use_count = 1 ;
512 }
513 DB_GEN("get SMbuf: mb = %x",(void *)mb,0,3) ;
514 return (mb) ; /* May be NULL */
515 }
516
517 void smt_free_mbuf(struct s_smc *smc, SMbuf *mb)
518 {
519
520 if (mb) {
521 mb->sm_use_count-- ;
522 DB_GEN("free_mbuf: sm_use_count = %d",mb->sm_use_count,0,3) ;
523 /*
524 * If the use_count is != zero the MBuf is queued
525 * more than once and must not queued into the
526 * free MBuf queue
527 */
528 if (!mb->sm_use_count) {
529 DB_GEN("free SMbuf: mb = %x",(void *)mb,0,3) ;
530 #ifndef COMMON_MB_POOL
531 mb->sm_next = smc->os.hwm.mbuf_pool.mb_free ;
532 smc->os.hwm.mbuf_pool.mb_free = mb ;
533 #else
534 mb->sm_next = mb_free ;
535 mb_free = mb ;
536 #endif
537 }
538 }
539 else
540 SMT_PANIC(smc,HWM_E0003,HWM_E0003_MSG) ;
541 }
542
543
544 /*
545 * BEGIN_MANUAL_ENTRY(mac_drv_repair_descr)
546 * void mac_drv_repair_descr(smc)
547 *
548 * function called from SMT (HWM / hwmtm.c)
549 * The BMU is idle when this function is called.
550 * Mac_drv_repair_descr sets up the physical address
551 * for all receive and transmit queues where the BMU
552 * should continue.
553 * It may be that the BMU was reseted during a fragmented
554 * transfer. In this case there are some fragments which will
555 * never completed by the BMU. The OWN bit of this fragments
556 * must be switched to be owned by the host.
557 *
558 * Give a start command to the receive BMU.
559 * Start the transmit BMUs if transmit frames pending.
560 *
561 * END_MANUAL_ENTRY
562 */
563 void mac_drv_repair_descr(struct s_smc *smc)
564 {
565 u_long phys ;
566
567 if (smc->hw.hw_state != STOPPED) {
568 SK_BREAK() ;
569 SMT_PANIC(smc,HWM_E0013,HWM_E0013_MSG) ;
570 return ;
571 }
572
573 /*
574 * repair tx queues: don't start
575 */
576 phys = repair_txd_ring(smc,smc->hw.fp.tx[QUEUE_A0]) ;
577 outpd(ADDR(B5_XA_DA),phys) ;
578 if (smc->hw.fp.tx_q[QUEUE_A0].tx_used) {
579 outpd(ADDR(B0_XA_CSR),CSR_START) ;
580 }
581 phys = repair_txd_ring(smc,smc->hw.fp.tx[QUEUE_S]) ;
582 outpd(ADDR(B5_XS_DA),phys) ;
583 if (smc->hw.fp.tx_q[QUEUE_S].tx_used) {
584 outpd(ADDR(B0_XS_CSR),CSR_START) ;
585 }
586
587 /*
588 * repair rx queues
589 */
590 phys = repair_rxd_ring(smc,smc->hw.fp.rx[QUEUE_R1]) ;
591 outpd(ADDR(B4_R1_DA),phys) ;
592 outpd(ADDR(B0_R1_CSR),CSR_START) ;
593 }
594
595 static u_long repair_txd_ring(struct s_smc *smc, struct s_smt_tx_queue *queue)
596 {
597 int i ;
598 int tx_used ;
599 u_long phys ;
600 u_long tbctrl ;
601 struct s_smt_fp_txd volatile *t ;
602
603 SK_UNUSED(smc) ;
604
605 t = queue->tx_curr_get ;
606 tx_used = queue->tx_used ;
607 for (i = tx_used+queue->tx_free-1 ; i ; i-- ) {
608 t = t->txd_next ;
609 }
610 phys = AIX_REVERSE(t->txd_ntdadr) ;
611
612 t = queue->tx_curr_get ;
613 while (tx_used) {
614 DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORCPU) ;
615 tbctrl = AIX_REVERSE(t->txd_tbctrl) ;
616
617 if (tbctrl & BMU_OWN) {
618 if (tbctrl & BMU_STF) {
619 break ; /* exit the loop */
620 }
621 else {
622 /*
623 * repair the descriptor
624 */
625 t->txd_tbctrl &= AIX_REVERSE(~BMU_OWN) ;
626 }
627 }
628 phys = AIX_REVERSE(t->txd_ntdadr) ;
629 DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORDEV) ;
630 t = t->txd_next ;
631 tx_used-- ;
632 }
633 return(phys) ;
634 }
635
636 /*
637 * Repairs the receive descriptor ring and returns the physical address
638 * where the BMU should continue working.
639 *
640 * o The physical address where the BMU was stopped has to be
641 * determined. This is the next RxD after rx_curr_get with an OWN
642 * bit set.
643 * o The BMU should start working at beginning of the next frame.
644 * RxDs with an OWN bit set but with a reset STF bit should be
645 * skipped and owned by the driver (OWN = 0).
646 */
647 static u_long repair_rxd_ring(struct s_smc *smc, struct s_smt_rx_queue *queue)
648 {
649 int i ;
650 int rx_used ;
651 u_long phys ;
652 u_long rbctrl ;
653 struct s_smt_fp_rxd volatile *r ;
654
655 SK_UNUSED(smc) ;
656
657 r = queue->rx_curr_get ;
658 rx_used = queue->rx_used ;
659 for (i = SMT_R1_RXD_COUNT-1 ; i ; i-- ) {
660 r = r->rxd_next ;
661 }
662 phys = AIX_REVERSE(r->rxd_nrdadr) ;
663
664 r = queue->rx_curr_get ;
665 while (rx_used) {
666 DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
667 rbctrl = AIX_REVERSE(r->rxd_rbctrl) ;
668
669 if (rbctrl & BMU_OWN) {
670 if (rbctrl & BMU_STF) {
671 break ; /* exit the loop */
672 }
673 else {
674 /*
675 * repair the descriptor
676 */
677 r->rxd_rbctrl &= AIX_REVERSE(~BMU_OWN) ;
678 }
679 }
680 phys = AIX_REVERSE(r->rxd_nrdadr) ;
681 DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORDEV) ;
682 r = r->rxd_next ;
683 rx_used-- ;
684 }
685 return(phys) ;
686 }
687
688
689 /*
690 -------------------------------------------------------------
691 INTERRUPT SERVICE ROUTINE:
692 -------------------------------------------------------------
693 */
694
695 /*
696 * BEGIN_MANUAL_ENTRY(fddi_isr)
697 * void fddi_isr(smc)
698 *
699 * function DOWNCALL (drvsr.c)
700 * interrupt service routine, handles the interrupt requests
701 * generated by the FDDI adapter.
702 *
703 * NOTE: The operating system dependent module must garantee that the
704 * interrupts of the adapter are disabled when it calls fddi_isr.
705 *
706 * About the USE_BREAK_ISR mechanismn:
707 *
708 * The main requirement of this mechanismn is to force an timer IRQ when
709 * leaving process_receive() with leave_isr set. process_receive() may
710 * be called at any time from anywhere!
711 * To be sure we don't miss such event we set 'force_irq' per default.
712 * We have to force and Timer IRQ if 'smc->os.hwm.leave_isr' AND
713 * 'force_irq' are set. 'force_irq' may be reset if a receive complete
714 * IRQ is pending.
715 *
716 * END_MANUAL_ENTRY
717 */
718 void fddi_isr(struct s_smc *smc)
719 {
720 u_long is ; /* ISR source */
721 u_short stu, stl ;
722 SMbuf *mb ;
723
724 #ifdef USE_BREAK_ISR
725 int force_irq ;
726 #endif
727
728 #ifdef ODI2
729 if (smc->os.hwm.rx_break) {
730 mac_drv_fill_rxd(smc) ;
731 if (smc->hw.fp.rx_q[QUEUE_R1].rx_used > 0) {
732 smc->os.hwm.rx_break = 0 ;
733 process_receive(smc) ;
734 }
735 else {
736 smc->os.hwm.detec_count = 0 ;
737 smt_force_irq(smc) ;
738 }
739 }
740 #endif
741 smc->os.hwm.isr_flag = TRUE ;
742
743 #ifdef USE_BREAK_ISR
744 force_irq = TRUE ;
745 if (smc->os.hwm.leave_isr) {
746 smc->os.hwm.leave_isr = FALSE ;
747 process_receive(smc) ;
748 }
749 #endif
750
751 while ((is = GET_ISR() & ISR_MASK)) {
752 NDD_TRACE("CH0B",is,0,0) ;
753 DB_GEN("ISA = 0x%x",is,0,7) ;
754
755 if (is & IMASK_SLOW) {
756 NDD_TRACE("CH1b",is,0,0) ;
757 if (is & IS_PLINT1) { /* PLC1 */
758 plc1_irq(smc) ;
759 }
760 if (is & IS_PLINT2) { /* PLC2 */
761 plc2_irq(smc) ;
762 }
763 if (is & IS_MINTR1) { /* FORMAC+ STU1(U/L) */
764 stu = inpw(FM_A(FM_ST1U)) ;
765 stl = inpw(FM_A(FM_ST1L)) ;
766 DB_GEN("Slow transmit complete",0,0,6) ;
767 mac1_irq(smc,stu,stl) ;
768 }
769 if (is & IS_MINTR2) { /* FORMAC+ STU2(U/L) */
770 stu= inpw(FM_A(FM_ST2U)) ;
771 stl= inpw(FM_A(FM_ST2L)) ;
772 DB_GEN("Slow receive complete",0,0,6) ;
773 DB_GEN("stl = %x : stu = %x",stl,stu,7) ;
774 mac2_irq(smc,stu,stl) ;
775 }
776 if (is & IS_MINTR3) { /* FORMAC+ STU3(U/L) */
777 stu= inpw(FM_A(FM_ST3U)) ;
778 stl= inpw(FM_A(FM_ST3L)) ;
779 DB_GEN("FORMAC Mode Register 3",0,0,6) ;
780 mac3_irq(smc,stu,stl) ;
781 }
782 if (is & IS_TIMINT) { /* Timer 82C54-2 */
783 timer_irq(smc) ;
784 #ifdef NDIS_OS2
785 force_irq_pending = 0 ;
786 #endif
787 /*
788 * out of RxD detection
789 */
790 if (++smc->os.hwm.detec_count > 4) {
791 /*
792 * check out of RxD condition
793 */
794 process_receive(smc) ;
795 }
796 }
797 if (is & IS_TOKEN) { /* Restricted Token Monitor */
798 rtm_irq(smc) ;
799 }
800 if (is & IS_R1_P) { /* Parity error rx queue 1 */
801 /* clear IRQ */
802 outpd(ADDR(B4_R1_CSR),CSR_IRQ_CL_P) ;
803 SMT_PANIC(smc,HWM_E0004,HWM_E0004_MSG) ;
804 }
805 if (is & IS_R1_C) { /* Encoding error rx queue 1 */
806 /* clear IRQ */
807 outpd(ADDR(B4_R1_CSR),CSR_IRQ_CL_C) ;
808 SMT_PANIC(smc,HWM_E0005,HWM_E0005_MSG) ;
809 }
810 if (is & IS_XA_C) { /* Encoding error async tx q */
811 /* clear IRQ */
812 outpd(ADDR(B5_XA_CSR),CSR_IRQ_CL_C) ;
813 SMT_PANIC(smc,HWM_E0006,HWM_E0006_MSG) ;
814 }
815 if (is & IS_XS_C) { /* Encoding error sync tx q */
816 /* clear IRQ */
817 outpd(ADDR(B5_XS_CSR),CSR_IRQ_CL_C) ;
818 SMT_PANIC(smc,HWM_E0007,HWM_E0007_MSG) ;
819 }
820 }
821
822 /*
823 * Fast Tx complete Async/Sync Queue (BMU service)
824 */
825 if (is & (IS_XS_F|IS_XA_F)) {
826 DB_GEN("Fast tx complete queue",0,0,6) ;
827 /*
828 * clear IRQ, Note: no IRQ is lost, because
829 * we always service both queues
830 */
831 outpd(ADDR(B5_XS_CSR),CSR_IRQ_CL_F) ;
832 outpd(ADDR(B5_XA_CSR),CSR_IRQ_CL_F) ;
833 mac_drv_clear_txd(smc) ;
834 llc_restart_tx(smc) ;
835 }
836
837 /*
838 * Fast Rx Complete (BMU service)
839 */
840 if (is & IS_R1_F) {
841 DB_GEN("Fast receive complete",0,0,6) ;
842 /* clear IRQ */
843 #ifndef USE_BREAK_ISR
844 outpd(ADDR(B4_R1_CSR),CSR_IRQ_CL_F) ;
845 process_receive(smc) ;
846 #else
847 process_receive(smc) ;
848 if (smc->os.hwm.leave_isr) {
849 force_irq = FALSE ;
850 } else {
851 outpd(ADDR(B4_R1_CSR),CSR_IRQ_CL_F) ;
852 process_receive(smc) ;
853 }
854 #endif
855 }
856
857 #ifndef NDIS_OS2
858 while ((mb = get_llc_rx(smc))) {
859 smt_to_llc(smc,mb) ;
860 }
861 #else
862 if (offDepth)
863 post_proc() ;
864
865 while (!offDepth && (mb = get_llc_rx(smc))) {
866 smt_to_llc(smc,mb) ;
867 }
868
869 if (!offDepth && smc->os.hwm.rx_break) {
870 process_receive(smc) ;
871 }
872 #endif
873 if (smc->q.ev_get != smc->q.ev_put) {
874 NDD_TRACE("CH2a",0,0,0) ;
875 ev_dispatcher(smc) ;
876 }
877 #ifdef NDIS_OS2
878 post_proc() ;
879 if (offDepth) { /* leave fddi_isr because */
880 break ; /* indications not allowed */
881 }
882 #endif
883 #ifdef USE_BREAK_ISR
884 if (smc->os.hwm.leave_isr) {
885 break ; /* leave fddi_isr */
886 }
887 #endif
888
889 /* NOTE: when the isr is left, no rx is pending */
890 } /* end of interrupt source polling loop */
891
892 #ifdef USE_BREAK_ISR
893 if (smc->os.hwm.leave_isr && force_irq) {
894 smt_force_irq(smc) ;
895 }
896 #endif
897 smc->os.hwm.isr_flag = FALSE ;
898 NDD_TRACE("CH0E",0,0,0) ;
899 }
900
901
902 /*
903 -------------------------------------------------------------
904 RECEIVE FUNCTIONS:
905 -------------------------------------------------------------
906 */
907
908 #ifndef NDIS_OS2
909 /*
910 * BEGIN_MANUAL_ENTRY(mac_drv_rx_mode)
911 * void mac_drv_rx_mode(smc,mode)
912 *
913 * function DOWNCALL (fplus.c)
914 * Corresponding to the parameter mode, the operating system
915 * dependent module can activate several receive modes.
916 *
917 * para mode = 1: RX_ENABLE_ALLMULTI enable all multicasts
918 * = 2: RX_DISABLE_ALLMULTI disable "enable all multicasts"
919 * = 3: RX_ENABLE_PROMISC enable promiscuous
920 * = 4: RX_DISABLE_PROMISC disable promiscuous
921 * = 5: RX_ENABLE_NSA enable rec. of all NSA frames
922 * (disabled after 'driver reset' & 'set station address')
923 * = 6: RX_DISABLE_NSA disable rec. of all NSA frames
924 *
925 * = 21: RX_ENABLE_PASS_SMT ( see description )
926 * = 22: RX_DISABLE_PASS_SMT ( " " )
927 * = 23: RX_ENABLE_PASS_NSA ( " " )
928 * = 24: RX_DISABLE_PASS_NSA ( " " )
929 * = 25: RX_ENABLE_PASS_DB ( " " )
930 * = 26: RX_DISABLE_PASS_DB ( " " )
931 * = 27: RX_DISABLE_PASS_ALL ( " " )
932 * = 28: RX_DISABLE_LLC_PROMISC ( " " )
933 * = 29: RX_ENABLE_LLC_PROMISC ( " " )
934 *
935 *
936 * RX_ENABLE_PASS_SMT / RX_DISABLE_PASS_SMT
937 *
938 * If the operating system dependent module activates the
939 * mode RX_ENABLE_PASS_SMT, the hardware module
940 * duplicates all SMT frames with the frame control
941 * FC_SMT_INFO and passes them to the LLC receive channel
942 * by calling mac_drv_rx_init.
943 * The SMT Frames which are sent by the local SMT and the NSA
944 * frames whose A- and C-Indicator is not set are also duplicated
945 * and passed.
946 * The receive mode RX_DISABLE_PASS_SMT disables the passing
947 * of SMT frames.
948 *
949 * RX_ENABLE_PASS_NSA / RX_DISABLE_PASS_NSA
950 *
951 * If the operating system dependent module activates the
952 * mode RX_ENABLE_PASS_NSA, the hardware module
953 * duplicates all NSA frames with frame control FC_SMT_NSA
954 * and a set A-Indicator and passed them to the LLC
955 * receive channel by calling mac_drv_rx_init.
956 * All NSA Frames which are sent by the local SMT
957 * are also duplicated and passed.
958 * The receive mode RX_DISABLE_PASS_NSA disables the passing
959 * of NSA frames with the A- or C-Indicator set.
960 *
961 * NOTE: For fear that the hardware module receives NSA frames with
962 * a reset A-Indicator, the operating system dependent module
963 * has to call mac_drv_rx_mode with the mode RX_ENABLE_NSA
964 * before activate the RX_ENABLE_PASS_NSA mode and after every
965 * 'driver reset' and 'set station address'.
966 *
967 * RX_ENABLE_PASS_DB / RX_DISABLE_PASS_DB
968 *
969 * If the operating system dependent module activates the
970 * mode RX_ENABLE_PASS_DB, direct BEACON frames
971 * (FC_BEACON frame control) are passed to the LLC receive
972 * channel by mac_drv_rx_init.
973 * The receive mode RX_DISABLE_PASS_DB disables the passing
974 * of direct BEACON frames.
975 *
976 * RX_DISABLE_PASS_ALL
977 *
978 * Disables all special receives modes. It is equal to
979 * call mac_drv_set_rx_mode successively with the
980 * parameters RX_DISABLE_NSA, RX_DISABLE_PASS_SMT,
981 * RX_DISABLE_PASS_NSA and RX_DISABLE_PASS_DB.
982 *
983 * RX_ENABLE_LLC_PROMISC
984 *
985 * (default) all received LLC frames and all SMT/NSA/DBEACON
986 * frames depending on the attitude of the flags
987 * PASS_SMT/PASS_NSA/PASS_DBEACON will be delivered to the
988 * LLC layer
989 *
990 * RX_DISABLE_LLC_PROMISC
991 *
992 * all received SMT/NSA/DBEACON frames depending on the
993 * attitude of the flags PASS_SMT/PASS_NSA/PASS_DBEACON
994 * will be delivered to the LLC layer.
995 * all received LLC frames with a directed address, Multicast
996 * or Broadcast address will be delivered to the LLC
997 * layer too.
998 *
999 * END_MANUAL_ENTRY
1000 */
1001 void mac_drv_rx_mode(struct s_smc *smc, int mode)
1002 {
1003 switch(mode) {
1004 case RX_ENABLE_PASS_SMT:
1005 smc->os.hwm.pass_SMT = TRUE ;
1006 break ;
1007 case RX_DISABLE_PASS_SMT:
1008 smc->os.hwm.pass_SMT = FALSE ;
1009 break ;
1010 case RX_ENABLE_PASS_NSA:
1011 smc->os.hwm.pass_NSA = TRUE ;
1012 break ;
1013 case RX_DISABLE_PASS_NSA:
1014 smc->os.hwm.pass_NSA = FALSE ;
1015 break ;
1016 case RX_ENABLE_PASS_DB:
1017 smc->os.hwm.pass_DB = TRUE ;
1018 break ;
1019 case RX_DISABLE_PASS_DB:
1020 smc->os.hwm.pass_DB = FALSE ;
1021 break ;
1022 case RX_DISABLE_PASS_ALL:
1023 smc->os.hwm.pass_SMT = smc->os.hwm.pass_NSA = FALSE ;
1024 smc->os.hwm.pass_DB = FALSE ;
1025 smc->os.hwm.pass_llc_promisc = TRUE ;
1026 mac_set_rx_mode(smc,RX_DISABLE_NSA) ;
1027 break ;
1028 case RX_DISABLE_LLC_PROMISC:
1029 smc->os.hwm.pass_llc_promisc = FALSE ;
1030 break ;
1031 case RX_ENABLE_LLC_PROMISC:
1032 smc->os.hwm.pass_llc_promisc = TRUE ;
1033 break ;
1034 case RX_ENABLE_ALLMULTI:
1035 case RX_DISABLE_ALLMULTI:
1036 case RX_ENABLE_PROMISC:
1037 case RX_DISABLE_PROMISC:
1038 case RX_ENABLE_NSA:
1039 case RX_DISABLE_NSA:
1040 default:
1041 mac_set_rx_mode(smc,mode) ;
1042 break ;
1043 }
1044 }
1045 #endif /* ifndef NDIS_OS2 */
1046
1047 /*
1048 * process receive queue
1049 */
1050 void process_receive(struct s_smc *smc)
1051 {
1052 int i ;
1053 int n ;
1054 int frag_count ; /* number of RxDs of the curr rx buf */
1055 int used_frags ; /* number of RxDs of the curr frame */
1056 struct s_smt_rx_queue *queue ; /* points to the queue ctl struct */
1057 struct s_smt_fp_rxd volatile *r ; /* rxd pointer */
1058 struct s_smt_fp_rxd volatile *rxd ; /* first rxd of rx frame */
1059 u_long rbctrl ; /* receive buffer control word */
1060 u_long rfsw ; /* receive frame status word */
1061 u_short rx_used ;
1062 u_char far *virt ;
1063 char far *data ;
1064 SMbuf *mb ;
1065 u_char fc ; /* Frame control */
1066 int len ; /* Frame length */
1067
1068 smc->os.hwm.detec_count = 0 ;
1069 queue = smc->hw.fp.rx[QUEUE_R1] ;
1070 NDD_TRACE("RHxB",0,0,0) ;
1071 for ( ; ; ) {
1072 r = queue->rx_curr_get ;
1073 rx_used = queue->rx_used ;
1074 frag_count = 0 ;
1075
1076 #ifdef USE_BREAK_ISR
1077 if (smc->os.hwm.leave_isr) {
1078 goto rx_end ;
1079 }
1080 #endif
1081 #ifdef NDIS_OS2
1082 if (offDepth) {
1083 smc->os.hwm.rx_break = 1 ;
1084 goto rx_end ;
1085 }
1086 smc->os.hwm.rx_break = 0 ;
1087 #endif
1088 #ifdef ODI2
1089 if (smc->os.hwm.rx_break) {
1090 goto rx_end ;
1091 }
1092 #endif
1093 n = 0 ;
1094 do {
1095 DB_RX("Check RxD %x for OWN and EOF",(void *)r,0,5) ;
1096 DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
1097 rbctrl = CR_READ(r->rxd_rbctrl) ;
1098 rbctrl = AIX_REVERSE(rbctrl) ;
1099
1100 if (rbctrl & BMU_OWN) {
1101 NDD_TRACE("RHxE",r,rfsw,rbctrl) ;
1102 DB_RX("End of RxDs",0,0,4) ;
1103 goto rx_end ;
1104 }
1105 /*
1106 * out of RxD detection
1107 */
1108 if (!rx_used) {
1109 SK_BREAK() ;
1110 SMT_PANIC(smc,HWM_E0009,HWM_E0009_MSG) ;
1111 /* Either we don't have an RxD or all
1112 * RxDs are filled. Therefore it's allowed
1113 * for to set the STOPPED flag */
1114 smc->hw.hw_state = STOPPED ;
1115 mac_drv_clear_rx_queue(smc) ;
1116 smc->hw.hw_state = STARTED ;
1117 mac_drv_fill_rxd(smc) ;
1118 smc->os.hwm.detec_count = 0 ;
1119 goto rx_end ;
1120 }
1121 rfsw = AIX_REVERSE(r->rxd_rfsw) ;
1122 if ((rbctrl & BMU_STF) != ((rbctrl & BMU_ST_BUF) <<5)) {
1123 /*
1124 * The BMU_STF bit is deleted, 1 frame is
1125 * placed into more than 1 rx buffer
1126 *
1127 * skip frame by setting the rx len to 0
1128 *
1129 * if fragment count == 0
1130 * The missing STF bit belongs to the
1131 * current frame, search for the
1132 * EOF bit to complete the frame
1133 * else
1134 * the fragment belongs to the next frame,
1135 * exit the loop and process the frame
1136 */
1137 SK_BREAK() ;
1138 rfsw = 0 ;
1139 if (frag_count) {
1140 break ;
1141 }
1142 }
1143 n += rbctrl & 0xffff ;
1144 r = r->rxd_next ;
1145 frag_count++ ;
1146 rx_used-- ;
1147 } while (!(rbctrl & BMU_EOF)) ;
1148 used_frags = frag_count ;
1149 DB_RX("EOF set in RxD, used_frags = %d ",used_frags,0,5) ;
1150
1151 /* may be next 2 DRV_BUF_FLUSH() can be skipped, because */
1152 /* BMU_ST_BUF will not be changed by the ASIC */
1153 DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
1154 while (rx_used && !(r->rxd_rbctrl & AIX_REVERSE(BMU_ST_BUF))) {
1155 DB_RX("Check STF bit in %x",(void *)r,0,5) ;
1156 r = r->rxd_next ;
1157 DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
1158 frag_count++ ;
1159 rx_used-- ;
1160 }
1161 DB_RX("STF bit found",0,0,5) ;
1162
1163 /*
1164 * The received frame is finished for the process receive
1165 */
1166 rxd = queue->rx_curr_get ;
1167 queue->rx_curr_get = r ;
1168 queue->rx_free += frag_count ;
1169 queue->rx_used = rx_used ;
1170
1171 /*
1172 * ASIC Errata no. 7 (STF - Bit Bug)
1173 */
1174 rxd->rxd_rbctrl &= AIX_REVERSE(~BMU_STF) ;
1175
1176 for (r=rxd, i=frag_count ; i ; r=r->rxd_next, i--){
1177 DB_RX("dma_complete for RxD %x",(void *)r,0,5) ;
1178 dma_complete(smc,(union s_fp_descr volatile *)r,DMA_WR);
1179 }
1180 smc->hw.fp.err_stats.err_valid++ ;
1181 smc->mib.m[MAC0].fddiMACCopied_Ct++ ;
1182
1183 /* the length of the data including the FC */
1184 len = (rfsw & RD_LENGTH) - 4 ;
1185
1186 DB_RX("frame length = %d",len,0,4) ;
1187 /*
1188 * check the frame_lenght and all error flags
1189 */
1190 if (rfsw & (RX_MSRABT|RX_FS_E|RX_FS_CRC|RX_FS_IMPL)){
1191 if (rfsw & RD_S_MSRABT) {
1192 DB_RX("Frame aborted by the FORMAC",0,0,2) ;
1193 smc->hw.fp.err_stats.err_abort++ ;
1194 }
1195 /*
1196 * check frame status
1197 */
1198 if (rfsw & RD_S_SEAC2) {
1199 DB_RX("E-Indicator set",0,0,2) ;
1200 smc->hw.fp.err_stats.err_e_indicator++ ;
1201 }
1202 if (rfsw & RD_S_SFRMERR) {
1203 DB_RX("CRC error",0,0,2) ;
1204 smc->hw.fp.err_stats.err_crc++ ;
1205 }
1206 if (rfsw & RX_FS_IMPL) {
1207 DB_RX("Implementer frame",0,0,2) ;
1208 smc->hw.fp.err_stats.err_imp_frame++ ;
1209 }
1210 goto abort_frame ;
1211 }
1212 if (len > FDDI_RAW_MTU-4) {
1213 DB_RX("Frame too long error",0,0,2) ;
1214 smc->hw.fp.err_stats.err_too_long++ ;
1215 goto abort_frame ;
1216 }
1217 /*
1218 * SUPERNET 3 Bug: FORMAC delivers status words
1219 * of aborded frames to the BMU
1220 */
1221 if (len <= 4) {
1222 DB_RX("Frame length = 0",0,0,2) ;
1223 goto abort_frame ;
1224 }
1225
1226 if (len != (n-4)) {
1227 DB_RX("BMU: rx len differs: [%d:%d]",len,n,4);
1228 smc->os.hwm.rx_len_error++ ;
1229 goto abort_frame ;
1230 }
1231
1232 /*
1233 * Check SA == MA
1234 */
1235 virt = (u_char far *) rxd->rxd_virt ;
1236 DB_RX("FC = %x",*virt,0,2) ;
1237 if (virt[12] == MA[5] &&
1238 virt[11] == MA[4] &&
1239 virt[10] == MA[3] &&
1240 virt[9] == MA[2] &&
1241 virt[8] == MA[1] &&
1242 (virt[7] & ~GROUP_ADDR_BIT) == MA[0]) {
1243 goto abort_frame ;
1244 }
1245
1246 /*
1247 * test if LLC frame
1248 */
1249 if (rfsw & RX_FS_LLC) {
1250 /*
1251 * if pass_llc_promisc is disable
1252 * if DA != Multicast or Broadcast or DA!=MA
1253 * abort the frame
1254 */
1255 if (!smc->os.hwm.pass_llc_promisc) {
1256 if(!(virt[1] & GROUP_ADDR_BIT)) {
1257 if (virt[6] != MA[5] ||
1258 virt[5] != MA[4] ||
1259 virt[4] != MA[3] ||
1260 virt[3] != MA[2] ||
1261 virt[2] != MA[1] ||
1262 virt[1] != MA[0]) {
1263 DB_RX("DA != MA and not multi- or broadcast",0,0,2) ;
1264 goto abort_frame ;
1265 }
1266 }
1267 }
1268
1269 /*
1270 * LLC frame received
1271 */
1272 DB_RX("LLC - receive",0,0,4) ;
1273 mac_drv_rx_complete(smc,rxd,frag_count,len) ;
1274 }
1275 else {
1276 if (!(mb = smt_get_mbuf(smc))) {
1277 smc->hw.fp.err_stats.err_no_buf++ ;
1278 DB_RX("No SMbuf; receive terminated",0,0,4) ;
1279 goto abort_frame ;
1280 }
1281 data = smtod(mb,char *) - 1 ;
1282
1283 /*
1284 * copy the frame into a SMT_MBuf
1285 */
1286 #ifdef USE_OS_CPY
1287 hwm_cpy_rxd2mb(rxd,data,len) ;
1288 #else
1289 for (r=rxd, i=used_frags ; i ; r=r->rxd_next, i--){
1290 n = AIX_REVERSE(r->rxd_rbctrl) & RD_LENGTH ;
1291 DB_RX("cp SMT frame to mb: len = %d",n,0,6) ;
1292 memcpy(data,r->rxd_virt,n) ;
1293 data += n ;
1294 }
1295 data = smtod(mb,char *) - 1 ;
1296 #endif
1297 fc = *(char *)mb->sm_data = *data ;
1298 mb->sm_len = len - 1 ; /* len - fc */
1299 data++ ;
1300
1301 /*
1302 * SMT frame received
1303 */
1304 switch(fc) {
1305 case FC_SMT_INFO :
1306 smc->hw.fp.err_stats.err_smt_frame++ ;
1307 DB_RX("SMT frame received ",0,0,5) ;
1308
1309 if (smc->os.hwm.pass_SMT) {
1310 DB_RX("pass SMT frame ",0,0,5) ;
1311 mac_drv_rx_complete(smc, rxd,
1312 frag_count,len) ;
1313 }
1314 else {
1315 DB_RX("requeue RxD",0,0,5) ;
1316 mac_drv_requeue_rxd(smc,rxd,frag_count);
1317 }
1318
1319 smt_received_pack(smc,mb,(int)(rfsw>>25)) ;
1320 break ;
1321 case FC_SMT_NSA :
1322 smc->hw.fp.err_stats.err_smt_frame++ ;
1323 DB_RX("SMT frame received ",0,0,5) ;
1324
1325 /* if pass_NSA set pass the NSA frame or */
1326 /* pass_SMT set and the A-Indicator */
1327 /* is not set, pass the NSA frame */
1328 if (smc->os.hwm.pass_NSA ||
1329 (smc->os.hwm.pass_SMT &&
1330 !(rfsw & A_INDIC))) {
1331 DB_RX("pass SMT frame ",0,0,5) ;
1332 mac_drv_rx_complete(smc, rxd,
1333 frag_count,len) ;
1334 }
1335 else {
1336 DB_RX("requeue RxD",0,0,5) ;
1337 mac_drv_requeue_rxd(smc,rxd,frag_count);
1338 }
1339
1340 smt_received_pack(smc,mb,(int)(rfsw>>25)) ;
1341 break ;
1342 case FC_BEACON :
1343 if (smc->os.hwm.pass_DB) {
1344 DB_RX("pass DB frame ",0,0,5) ;
1345 mac_drv_rx_complete(smc, rxd,
1346 frag_count,len) ;
1347 }
1348 else {
1349 DB_RX("requeue RxD",0,0,5) ;
1350 mac_drv_requeue_rxd(smc,rxd,frag_count);
1351 }
1352 smt_free_mbuf(smc,mb) ;
1353 break ;
1354 default :
1355 /*
1356 * unknown FC abord the frame
1357 */
1358 DB_RX("unknown FC error",0,0,2) ;
1359 smt_free_mbuf(smc,mb) ;
1360 DB_RX("requeue RxD",0,0,5) ;
1361 mac_drv_requeue_rxd(smc,rxd,frag_count) ;
1362 if ((fc & 0xf0) == FC_MAC)
1363 smc->hw.fp.err_stats.err_mac_frame++ ;
1364 else
1365 smc->hw.fp.err_stats.err_imp_frame++ ;
1366
1367 break ;
1368 }
1369 }
1370
1371 DB_RX("next RxD is %x ",queue->rx_curr_get,0,3) ;
1372 NDD_TRACE("RHx1",queue->rx_curr_get,0,0) ;
1373
1374 continue ;
1375 /*--------------------------------------------------------------------*/
1376 abort_frame:
1377 DB_RX("requeue RxD",0,0,5) ;
1378 mac_drv_requeue_rxd(smc,rxd,frag_count) ;
1379
1380 DB_RX("next RxD is %x ",queue->rx_curr_get,0,3) ;
1381 NDD_TRACE("RHx2",queue->rx_curr_get,0,0) ;
1382 }
1383 rx_end:
1384 #ifdef ALL_RX_COMPLETE
1385 mac_drv_all_receives_complete(smc) ;
1386 #endif
1387 return ; /* lint bug: needs return detect end of function */
1388 }
1389
1390 static void smt_to_llc(struct s_smc *smc, SMbuf *mb)
1391 {
1392 u_char fc ;
1393
1394 DB_RX("send a queued frame to the llc layer",0,0,4) ;
1395 smc->os.hwm.r.len = mb->sm_len ;
1396 smc->os.hwm.r.mb_pos = smtod(mb,char *) ;
1397 fc = *smc->os.hwm.r.mb_pos ;
1398 (void)mac_drv_rx_init(smc,(int)mb->sm_len,(int)fc,
1399 smc->os.hwm.r.mb_pos,(int)mb->sm_len) ;
1400 smt_free_mbuf(smc,mb) ;
1401 }
1402
1403 /*
1404 * BEGIN_MANUAL_ENTRY(hwm_rx_frag)
1405 * void hwm_rx_frag(smc,virt,phys,len,frame_status)
1406 *
1407 * function MACRO (hardware module, hwmtm.h)
1408 * This function calls dma_master for preparing the
1409 * system hardware for the DMA transfer and initializes
1410 * the current RxD with the length and the physical and
1411 * virtual address of the fragment. Furthermore, it sets the
1412 * STF and EOF bits depending on the frame status byte,
1413 * switches the OWN flag of the RxD, so that it is owned by the
1414 * adapter and issues an rx_start.
1415 *
1416 * para virt virtual pointer to the fragment
1417 * len the length of the fragment
1418 * frame_status status of the frame, see design description
1419 *
1420 * NOTE: It is possible to call this function with a fragment length
1421 * of zero.
1422 *
1423 * END_MANUAL_ENTRY
1424 */
1425 void hwm_rx_frag(struct s_smc *smc, char far *virt, u_long phys, int len,
1426 int frame_status)
1427 {
1428 struct s_smt_fp_rxd volatile *r ;
1429 u_int rbctrl ;
1430
1431 NDD_TRACE("RHfB",virt,len,frame_status) ;
1432 DB_RX("hwm_rx_frag: len = %d, frame_status = %x\n",len,frame_status,2) ;
1433 r = smc->hw.fp.rx_q[QUEUE_R1].rx_curr_put ;
1434 r->rxd_virt = virt ;
1435 r->rxd_rbadr = AIX_REVERSE(phys) ;
1436 rbctrl = AIX_REVERSE( (((u_long)frame_status &
1437 (FIRST_FRAG|LAST_FRAG))<<26) |
1438 (((u_long) frame_status & FIRST_FRAG) << 21) |
1439 BMU_OWN | BMU_CHECK | BMU_EN_IRQ_EOF | len) ;
1440 r->rxd_rbctrl = rbctrl ;
1441
1442 DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORDEV) ;
1443 outpd(ADDR(B0_R1_CSR),CSR_START) ;
1444 smc->hw.fp.rx_q[QUEUE_R1].rx_free-- ;
1445 smc->hw.fp.rx_q[QUEUE_R1].rx_used++ ;
1446 smc->hw.fp.rx_q[QUEUE_R1].rx_curr_put = r->rxd_next ;
1447 NDD_TRACE("RHfE",r,AIX_REVERSE(r->rxd_rbadr),0) ;
1448 }
1449
1450 /*
1451 * BEGINN_MANUAL_ENTRY(mac_drv_clear_rx_queue)
1452 *
1453 * void mac_drv_clear_rx_queue(smc)
1454 * struct s_smc *smc ;
1455 *
1456 * function DOWNCALL (hardware module, hwmtm.c)
1457 * mac_drv_clear_rx_queue is called by the OS-specific module
1458 * after it has issued a card_stop.
1459 * In this case, the frames in the receive queue are obsolete and
1460 * should be removed. For removing mac_drv_clear_rx_queue
1461 * calls dma_master for each RxD and mac_drv_clear_rxd for each
1462 * receive buffer.
1463 *
1464 * NOTE: calling sequence card_stop:
1465 * CLI_FBI(), card_stop(),
1466 * mac_drv_clear_tx_queue(), mac_drv_clear_rx_queue(),
1467 *
1468 * NOTE: The caller is responsible that the BMUs are idle
1469 * when this function is called.
1470 *
1471 * END_MANUAL_ENTRY
1472 */
1473 void mac_drv_clear_rx_queue(struct s_smc *smc)
1474 {
1475 struct s_smt_fp_rxd volatile *r ;
1476 struct s_smt_fp_rxd volatile *next_rxd ;
1477 struct s_smt_rx_queue *queue ;
1478 int frag_count ;
1479 int i ;
1480
1481 if (smc->hw.hw_state != STOPPED) {
1482 SK_BREAK() ;
1483 SMT_PANIC(smc,HWM_E0012,HWM_E0012_MSG) ;
1484 return ;
1485 }
1486
1487 queue = smc->hw.fp.rx[QUEUE_R1] ;
1488 DB_RX("clear_rx_queue",0,0,5) ;
1489
1490 /*
1491 * dma_complete and mac_drv_clear_rxd for all RxDs / receive buffers
1492 */
1493 r = queue->rx_curr_get ;
1494 while (queue->rx_used) {
1495 DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
1496 DB_RX("switch OWN bit of RxD 0x%x ",r,0,5) ;
1497 r->rxd_rbctrl &= AIX_REVERSE(~BMU_OWN) ;
1498 frag_count = 1 ;
1499 DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORDEV) ;
1500 r = r->rxd_next ;
1501 DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
1502 while (r != queue->rx_curr_put &&
1503 !(r->rxd_rbctrl & AIX_REVERSE(BMU_ST_BUF))) {
1504 DB_RX("Check STF bit in %x",(void *)r,0,5) ;
1505 r->rxd_rbctrl &= AIX_REVERSE(~BMU_OWN) ;
1506 DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORDEV) ;
1507 r = r->rxd_next ;
1508 DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
1509 frag_count++ ;
1510 }
1511 DB_RX("STF bit found",0,0,5) ;
1512 next_rxd = r ;
1513
1514 for (r=queue->rx_curr_get,i=frag_count; i ; r=r->rxd_next,i--){
1515 DB_RX("dma_complete for RxD %x",(void *)r,0,5) ;
1516 dma_complete(smc,(union s_fp_descr volatile *)r,DMA_WR);
1517 }
1518
1519 DB_RX("mac_drv_clear_rxd: RxD %x frag_count %d ",
1520 (void *)queue->rx_curr_get,frag_count,5) ;
1521 mac_drv_clear_rxd(smc,queue->rx_curr_get,frag_count) ;
1522
1523 queue->rx_curr_get = next_rxd ;
1524 queue->rx_used -= frag_count ;
1525 queue->rx_free += frag_count ;
1526 }
1527 }
1528
1529
1530 /*
1531 -------------------------------------------------------------
1532 SEND FUNCTIONS:
1533 -------------------------------------------------------------
1534 */
1535
1536 /*
1537 * BEGIN_MANUAL_ENTRY(hwm_tx_init)
1538 * int hwm_tx_init(smc,fc,frag_count,frame_len,frame_status)
1539 *
1540 * function DOWN_CALL (hardware module, hwmtm.c)
1541 * hwm_tx_init checks if the frame can be sent through the
1542 * corresponding send queue.
1543 *
1544 * para fc the frame control. To determine through which
1545 * send queue the frame should be transmitted.
1546 * 0x50 - 0x57: asynchronous LLC frame
1547 * 0xD0 - 0xD7: synchronous LLC frame
1548 * 0x41, 0x4F: SMT frame to the network
1549 * 0x42: SMT frame to the network and to the local SMT
1550 * 0x43: SMT frame to the local SMT
1551 * frag_count count of the fragments for this frame
1552 * frame_len length of the frame
1553 * frame_status status of the frame, the send queue bit is already
1554 * specified
1555 *
1556 * return frame_status
1557 *
1558 * END_MANUAL_ENTRY
1559 */
1560 int hwm_tx_init(struct s_smc *smc, u_char fc, int frag_count, int frame_len,
1561 int frame_status)
1562 {
1563 NDD_TRACE("THiB",fc,frag_count,frame_len) ;
1564 smc->os.hwm.tx_p = smc->hw.fp.tx[frame_status & QUEUE_A0] ;
1565 smc->os.hwm.tx_descr = TX_DESCRIPTOR | (((u_long)(frame_len-1)&3)<<27) ;
1566 smc->os.hwm.tx_len = frame_len ;
1567 DB_TX("hwm_tx_init: fc = %x, len = %d",fc,frame_len,3) ;
1568 if ((fc & ~(FC_SYNC_BIT|FC_LLC_PRIOR)) == FC_ASYNC_LLC) {
1569 frame_status |= LAN_TX ;
1570 }
1571 else {
1572 switch (fc) {
1573 case FC_SMT_INFO :
1574 case FC_SMT_NSA :
1575 frame_status |= LAN_TX ;
1576 break ;
1577 case FC_SMT_LOC :
1578 frame_status |= LOC_TX ;
1579 break ;
1580 case FC_SMT_LAN_LOC :
1581 frame_status |= LAN_TX | LOC_TX ;
1582 break ;
1583 default :
1584 SMT_PANIC(smc,HWM_E0010,HWM_E0010_MSG) ;
1585 }
1586 }
1587 if (!smc->hw.mac_ring_is_up) {
1588 frame_status &= ~LAN_TX ;
1589 frame_status |= RING_DOWN ;
1590 DB_TX("Ring is down: terminate LAN_TX",0,0,2) ;
1591 }
1592 if (frag_count > smc->os.hwm.tx_p->tx_free) {
1593 #ifndef NDIS_OS2
1594 mac_drv_clear_txd(smc) ;
1595 if (frag_count > smc->os.hwm.tx_p->tx_free) {
1596 DB_TX("Out of TxDs, terminate LAN_TX",0,0,2) ;
1597 frame_status &= ~LAN_TX ;
1598 frame_status |= OUT_OF_TXD ;
1599 }
1600 #else
1601 DB_TX("Out of TxDs, terminate LAN_TX",0,0,2) ;
1602 frame_status &= ~LAN_TX ;
1603 frame_status |= OUT_OF_TXD ;
1604 #endif
1605 }
1606 DB_TX("frame_status = %x",frame_status,0,3) ;
1607 NDD_TRACE("THiE",frame_status,smc->os.hwm.tx_p->tx_free,0) ;
1608 return(frame_status) ;
1609 }
1610
1611 /*
1612 * BEGIN_MANUAL_ENTRY(hwm_tx_frag)
1613 * void hwm_tx_frag(smc,virt,phys,len,frame_status)
1614 *
1615 * function DOWNCALL (hardware module, hwmtm.c)
1616 * If the frame should be sent to the LAN, this function calls
1617 * dma_master, fills the current TxD with the virtual and the
1618 * physical address, sets the STF and EOF bits dependent on
1619 * the frame status, and requests the BMU to start the
1620 * transmit.
1621 * If the frame should be sent to the local SMT, an SMT_MBuf
1622 * is allocated if the FIRST_FRAG bit is set in the frame_status.
1623 * The fragment of the frame is copied into the SMT MBuf.
1624 * The function smt_received_pack is called if the LAST_FRAG
1625 * bit is set in the frame_status word.
1626 *
1627 * para virt virtual pointer to the fragment
1628 * len the length of the fragment
1629 * frame_status status of the frame, see design description
1630 *
1631 * return nothing returned, no parameter is modified
1632 *
1633 * NOTE: It is possible to invoke this macro with a fragment length
1634 * of zero.
1635 *
1636 * END_MANUAL_ENTRY
1637 */
1638 void hwm_tx_frag(struct s_smc *smc, char far *virt, u_long phys, int len,
1639 int frame_status)
1640 {
1641 struct s_smt_fp_txd volatile *t ;
1642 struct s_smt_tx_queue *queue ;
1643 u_int tbctrl ;
1644
1645 queue = smc->os.hwm.tx_p ;
1646
1647 NDD_TRACE("THfB",virt,len,frame_status) ;
1648 /* Bug fix: AF / May 31 1999 (#missing)
1649 * snmpinfo problem reported by IBM is caused by invalid
1650 * t-pointer (txd) if LAN_TX is not set but LOC_TX only.
1651 * Set: t = queue->tx_curr_put here !
1652 */
1653 t = queue->tx_curr_put ;
1654
1655 DB_TX("hwm_tx_frag: len = %d, frame_status = %x ",len,frame_status,2) ;
1656 if (frame_status & LAN_TX) {
1657 /* '*t' is already defined */
1658 DB_TX("LAN_TX: TxD = %x, virt = %x ",t,virt,3) ;
1659 t->txd_virt = virt ;
1660 t->txd_txdscr = AIX_REVERSE(smc->os.hwm.tx_descr) ;
1661 t->txd_tbadr = AIX_REVERSE(phys) ;
1662 tbctrl = AIX_REVERSE((((u_long)frame_status &
1663 (FIRST_FRAG|LAST_FRAG|EN_IRQ_EOF))<< 26) |
1664 BMU_OWN|BMU_CHECK |len) ;
1665 t->txd_tbctrl = tbctrl ;
1666
1667 #ifndef AIX
1668 DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORDEV) ;
1669 outpd(queue->tx_bmu_ctl,CSR_START) ;
1670 #else /* ifndef AIX */
1671 DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORDEV) ;
1672 if (frame_status & QUEUE_A0) {
1673 outpd(ADDR(B0_XA_CSR),CSR_START) ;
1674 }
1675 else {
1676 outpd(ADDR(B0_XS_CSR),CSR_START) ;
1677 }
1678 #endif
1679 queue->tx_free-- ;
1680 queue->tx_used++ ;
1681 queue->tx_curr_put = t->txd_next ;
1682 if (frame_status & LAST_FRAG) {
1683 smc->mib.m[MAC0].fddiMACTransmit_Ct++ ;
1684 }
1685 }
1686 if (frame_status & LOC_TX) {
1687 DB_TX("LOC_TX: ",0,0,3) ;
1688 if (frame_status & FIRST_FRAG) {
1689 if(!(smc->os.hwm.tx_mb = smt_get_mbuf(smc))) {
1690 smc->hw.fp.err_stats.err_no_buf++ ;
1691 DB_TX("No SMbuf; transmit terminated",0,0,4) ;
1692 }
1693 else {
1694 smc->os.hwm.tx_data =
1695 smtod(smc->os.hwm.tx_mb,char *) - 1 ;
1696 #ifdef USE_OS_CPY
1697 #ifdef PASS_1ST_TXD_2_TX_COMP
1698 hwm_cpy_txd2mb(t,smc->os.hwm.tx_data,
1699 smc->os.hwm.tx_len) ;
1700 #endif
1701 #endif
1702 }
1703 }
1704 if (smc->os.hwm.tx_mb) {
1705 #ifndef USE_OS_CPY
1706 DB_TX("copy fragment into MBuf ",0,0,3) ;
1707 memcpy(smc->os.hwm.tx_data,virt,len) ;
1708 smc->os.hwm.tx_data += len ;
1709 #endif
1710 if (frame_status & LAST_FRAG) {
1711 #ifdef USE_OS_CPY
1712 #ifndef PASS_1ST_TXD_2_TX_COMP
1713 /*
1714 * hwm_cpy_txd2mb(txd,data,len) copies 'len'
1715 * bytes from the virtual pointer in 'rxd'
1716 * to 'data'. The virtual pointer of the
1717 * os-specific tx-buffer should be written
1718 * in the LAST txd.
1719 */
1720 hwm_cpy_txd2mb(t,smc->os.hwm.tx_data,
1721 smc->os.hwm.tx_len) ;
1722 #endif /* nPASS_1ST_TXD_2_TX_COMP */
1723 #endif /* USE_OS_CPY */
1724 smc->os.hwm.tx_data =
1725 smtod(smc->os.hwm.tx_mb,char *) - 1 ;
1726 *(char *)smc->os.hwm.tx_mb->sm_data =
1727 *smc->os.hwm.tx_data ;
1728 smc->os.hwm.tx_data++ ;
1729 smc->os.hwm.tx_mb->sm_len =
1730 smc->os.hwm.tx_len - 1 ;
1731 DB_TX("pass LLC frame to SMT ",0,0,3) ;
1732 smt_received_pack(smc,smc->os.hwm.tx_mb,
1733 RD_FS_LOCAL) ;
1734 }
1735 }
1736 }
1737 NDD_TRACE("THfE",t,queue->tx_free,0) ;
1738 }
1739
1740
1741 /*
1742 * queues a receive for later send
1743 */
1744 static void queue_llc_rx(struct s_smc *smc, SMbuf *mb)
1745 {
1746 DB_GEN("queue_llc_rx: mb = %x",(void *)mb,0,4) ;
1747 smc->os.hwm.queued_rx_frames++ ;
1748 mb->sm_next = (SMbuf *)NULL ;
1749 if (smc->os.hwm.llc_rx_pipe == 0) {
1750 smc->os.hwm.llc_rx_pipe = mb ;
1751 }
1752 else {
1753 smc->os.hwm.llc_rx_tail->sm_next = mb ;
1754 }
1755 smc->os.hwm.llc_rx_tail = mb ;
1756
1757 /*
1758 * force an timer IRQ to receive the data
1759 */
1760 if (!smc->os.hwm.isr_flag) {
1761 smt_force_irq(smc) ;
1762 }
1763 }
1764
1765 /*
1766 * get a SMbuf from the llc_rx_queue
1767 */
1768 static SMbuf *get_llc_rx(struct s_smc *smc)
1769 {
1770 SMbuf *mb ;
1771
1772 if ((mb = smc->os.hwm.llc_rx_pipe)) {
1773 smc->os.hwm.queued_rx_frames-- ;
1774 smc->os.hwm.llc_rx_pipe = mb->sm_next ;
1775 }
1776 DB_GEN("get_llc_rx: mb = 0x%x",(void *)mb,0,4) ;
1777 return(mb) ;
1778 }
1779
1780 /*
1781 * queues a transmit SMT MBuf during the time were the MBuf is
1782 * queued the TxD ring
1783 */
1784 static void queue_txd_mb(struct s_smc *smc, SMbuf *mb)
1785 {
1786 DB_GEN("_rx: queue_txd_mb = %x",(void *)mb,0,4) ;
1787 smc->os.hwm.queued_txd_mb++ ;
1788 mb->sm_next = (SMbuf *)NULL ;
1789 if (smc->os.hwm.txd_tx_pipe == 0) {
1790 smc->os.hwm.txd_tx_pipe = mb ;
1791 }
1792 else {
1793 smc->os.hwm.txd_tx_tail->sm_next = mb ;
1794 }
1795 smc->os.hwm.txd_tx_tail = mb ;
1796 }
1797
1798 /*
1799 * get a SMbuf from the txd_tx_queue
1800 */
1801 static SMbuf *get_txd_mb(struct s_smc *smc)
1802 {
1803 SMbuf *mb ;
1804
1805 if ((mb = smc->os.hwm.txd_tx_pipe)) {
1806 smc->os.hwm.queued_txd_mb-- ;
1807 smc->os.hwm.txd_tx_pipe = mb->sm_next ;
1808 }
1809 DB_GEN("get_txd_mb: mb = 0x%x",(void *)mb,0,4) ;
1810 return(mb) ;
1811 }
1812
1813 /*
1814 * SMT Send function
1815 */
1816 void smt_send_mbuf(struct s_smc *smc, SMbuf *mb, int fc)
1817 {
1818 char far *data ;
1819 int len ;
1820 int n ;
1821 int i ;
1822 int frag_count ;
1823 int frame_status ;
1824 SK_LOC_DECL(char far,*virt[3]) ;
1825 int frag_len[3] ;
1826 struct s_smt_tx_queue *queue ;
1827 struct s_smt_fp_txd volatile *t ;
1828 u_long phys ;
1829 u_int tbctrl ;
1830
1831 NDD_TRACE("THSB",mb,fc,0) ;
1832 DB_TX("smt_send_mbuf: mb = 0x%x, fc = 0x%x",mb,fc,4) ;
1833
1834 mb->sm_off-- ; /* set to fc */
1835 mb->sm_len++ ; /* + fc */
1836 data = smtod(mb,char *) ;
1837 *data = fc ;
1838 if (fc == FC_SMT_LOC)
1839 *data = FC_SMT_INFO ;
1840
1841 /*
1842 * determine the frag count and the virt addresses of the frags
1843 */
1844 frag_count = 0 ;
1845 len = mb->sm_len ;
1846 while (len) {
1847 n = SMT_PAGESIZE - ((long)data & (SMT_PAGESIZE-1)) ;
1848 if (n >= len) {
1849 n = len ;
1850 }
1851 DB_TX("frag: virt/len = 0x%x/%d ",(void *)data,n,5) ;
1852 virt[frag_count] = data ;
1853 frag_len[frag_count] = n ;
1854 frag_count++ ;
1855 len -= n ;
1856 data += n ;
1857 }
1858
1859 /*
1860 * determine the frame status
1861 */
1862 queue = smc->hw.fp.tx[QUEUE_A0] ;
1863 if (fc == FC_BEACON || fc == FC_SMT_LOC) {
1864 frame_status = LOC_TX ;
1865 }
1866 else {
1867 frame_status = LAN_TX ;
1868 if ((smc->os.hwm.pass_NSA &&(fc == FC_SMT_NSA)) ||
1869 (smc->os.hwm.pass_SMT &&(fc == FC_SMT_INFO)))
1870 frame_status |= LOC_TX ;
1871 }
1872
1873 if (!smc->hw.mac_ring_is_up || frag_count > queue->tx_free) {
1874 frame_status &= ~LAN_TX;
1875 if (frame_status) {
1876 DB_TX("Ring is down: terminate LAN_TX",0,0,2) ;
1877 }
1878 else {
1879 DB_TX("Ring is down: terminate transmission",0,0,2) ;
1880 smt_free_mbuf(smc,mb) ;
1881 return ;
1882 }
1883 }
1884 DB_TX("frame_status = 0x%x ",frame_status,0,5) ;
1885
1886 if ((frame_status & LAN_TX) && (frame_status & LOC_TX)) {
1887 mb->sm_use_count = 2 ;
1888 }
1889
1890 if (frame_status & LAN_TX) {
1891 t = queue->tx_curr_put ;
1892 frame_status |= FIRST_FRAG ;
1893 for (i = 0; i < frag_count; i++) {
1894 DB_TX("init TxD = 0x%x",(void *)t,0,5) ;
1895 if (i == frag_count-1) {
1896 frame_status |= LAST_FRAG ;
1897 t->txd_txdscr = AIX_REVERSE(TX_DESCRIPTOR |
1898 (((u_long)(mb->sm_len-1)&3) << 27)) ;
1899 }
1900 t->txd_virt = virt[i] ;
1901 phys = dma_master(smc, (void far *)virt[i],
1902 frag_len[i], DMA_RD|SMT_BUF) ;
1903 t->txd_tbadr = AIX_REVERSE(phys) ;
1904 tbctrl = AIX_REVERSE((((u_long) frame_status &
1905 (FIRST_FRAG|LAST_FRAG)) << 26) |
1906 BMU_OWN | BMU_CHECK | BMU_SMT_TX |frag_len[i]) ;
1907 t->txd_tbctrl = tbctrl ;
1908 #ifndef AIX
1909 DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORDEV) ;
1910 outpd(queue->tx_bmu_ctl,CSR_START) ;
1911 #else
1912 DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORDEV) ;
1913 outpd(ADDR(B0_XA_CSR),CSR_START) ;
1914 #endif
1915 frame_status &= ~FIRST_FRAG ;
1916 queue->tx_curr_put = t = t->txd_next ;
1917 queue->tx_free-- ;
1918 queue->tx_used++ ;
1919 }
1920 smc->mib.m[MAC0].fddiMACTransmit_Ct++ ;
1921 queue_txd_mb(smc,mb) ;
1922 }
1923
1924 if (frame_status & LOC_TX) {
1925 DB_TX("pass Mbuf to LLC queue",0,0,5) ;
1926 queue_llc_rx(smc,mb) ;
1927 }
1928
1929 /*
1930 * We need to unqueue the free SMT_MBUFs here, because it may
1931 * be that the SMT want's to send more than 1 frame for one down call
1932 */
1933 mac_drv_clear_txd(smc) ;
1934 NDD_TRACE("THSE",t,queue->tx_free,frag_count) ;
1935 }
1936
1937 /* BEGIN_MANUAL_ENTRY(mac_drv_clear_txd)
1938 * void mac_drv_clear_txd(smc)
1939 *
1940 * function DOWNCALL (hardware module, hwmtm.c)
1941 * mac_drv_clear_txd searches in both send queues for TxD's
1942 * which were finished by the adapter. It calls dma_complete
1943 * for each TxD. If the last fragment of an LLC frame is
1944 * reached, it calls mac_drv_tx_complete to release the
1945 * send buffer.
1946 *
1947 * return nothing
1948 *
1949 * END_MANUAL_ENTRY
1950 */
1951 static void mac_drv_clear_txd(struct s_smc *smc)
1952 {
1953 struct s_smt_tx_queue *queue ;
1954 struct s_smt_fp_txd volatile *t1 ;
1955 struct s_smt_fp_txd volatile *t2 = NULL ;
1956 SMbuf *mb ;
1957 u_long tbctrl ;
1958 int i ;
1959 int frag_count ;
1960 int n ;
1961
1962 NDD_TRACE("THcB",0,0,0) ;
1963 for (i = QUEUE_S; i <= QUEUE_A0; i++) {
1964 queue = smc->hw.fp.tx[i] ;
1965 t1 = queue->tx_curr_get ;
1966 DB_TX("clear_txd: QUEUE = %d (0=sync/1=async)",i,0,5) ;
1967
1968 for ( ; ; ) {
1969 frag_count = 0 ;
1970
1971 do {
1972 DRV_BUF_FLUSH(t1,DDI_DMA_SYNC_FORCPU) ;
1973 DB_TX("check OWN/EOF bit of TxD 0x%x",t1,0,5) ;
1974 tbctrl = CR_READ(t1->txd_tbctrl) ;
1975 tbctrl = AIX_REVERSE(tbctrl) ;
1976
1977 if (tbctrl & BMU_OWN || !queue->tx_used){
1978 DB_TX("End of TxDs queue %d",i,0,4) ;
1979 goto free_next_queue ; /* next queue */
1980 }
1981 t1 = t1->txd_next ;
1982 frag_count++ ;
1983 } while (!(tbctrl & BMU_EOF)) ;
1984
1985 t1 = queue->tx_curr_get ;
1986 for (n = frag_count; n; n--) {
1987 tbctrl = AIX_REVERSE(t1->txd_tbctrl) ;
1988 dma_complete(smc,
1989 (union s_fp_descr volatile *) t1,
1990 (int) (DMA_RD |
1991 ((tbctrl & BMU_SMT_TX) >> 18))) ;
1992 t2 = t1 ;
1993 t1 = t1->txd_next ;
1994 }
1995
1996 if (tbctrl & BMU_SMT_TX) {
1997 mb = get_txd_mb(smc) ;
1998 smt_free_mbuf(smc,mb) ;
1999 }
2000 else {
2001 #ifndef PASS_1ST_TXD_2_TX_COMP
2002 DB_TX("mac_drv_tx_comp for TxD 0x%x",t2,0,4) ;
2003 mac_drv_tx_complete(smc,t2) ;
2004 #else
2005 DB_TX("mac_drv_tx_comp for TxD 0x%x",
2006 queue->tx_curr_get,0,4) ;
2007 mac_drv_tx_complete(smc,queue->tx_curr_get) ;
2008 #endif
2009 }
2010 queue->tx_curr_get = t1 ;
2011 queue->tx_free += frag_count ;
2012 queue->tx_used -= frag_count ;
2013 }
2014 free_next_queue: ;
2015 }
2016 NDD_TRACE("THcE",0,0,0) ;
2017 }
2018
2019 /*
2020 * BEGINN_MANUAL_ENTRY(mac_drv_clear_tx_queue)
2021 *
2022 * void mac_drv_clear_tx_queue(smc)
2023 * struct s_smc *smc ;
2024 *
2025 * function DOWNCALL (hardware module, hwmtm.c)
2026 * mac_drv_clear_tx_queue is called from the SMT when
2027 * the RMT state machine has entered the ISOLATE state.
2028 * This function is also called by the os-specific module
2029 * after it has called the function card_stop().
2030 * In this case, the frames in the send queues are obsolete and
2031 * should be removed.
2032 *
2033 * note calling sequence:
2034 * CLI_FBI(), card_stop(),
2035 * mac_drv_clear_tx_queue(), mac_drv_clear_rx_queue(),
2036 *
2037 * NOTE: The caller is responsible that the BMUs are idle
2038 * when this function is called.
2039 *
2040 * END_MANUAL_ENTRY
2041 */
2042 void mac_drv_clear_tx_queue(struct s_smc *smc)
2043 {
2044 struct s_smt_fp_txd volatile *t ;
2045 struct s_smt_tx_queue *queue ;
2046 int tx_used ;
2047 int i ;
2048
2049 if (smc->hw.hw_state != STOPPED) {
2050 SK_BREAK() ;
2051 SMT_PANIC(smc,HWM_E0011,HWM_E0011_MSG) ;
2052 return ;
2053 }
2054
2055 for (i = QUEUE_S; i <= QUEUE_A0; i++) {
2056 queue = smc->hw.fp.tx[i] ;
2057 DB_TX("clear_tx_queue: QUEUE = %d (0=sync/1=async)",i,0,5) ;
2058
2059 /*
2060 * switch the OWN bit of all pending frames to the host
2061 */
2062 t = queue->tx_curr_get ;
2063 tx_used = queue->tx_used ;
2064 while (tx_used) {
2065 DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORCPU) ;
2066 DB_TX("switch OWN bit of TxD 0x%x ",t,0,5) ;
2067 t->txd_tbctrl &= AIX_REVERSE(~BMU_OWN) ;
2068 DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORDEV) ;
2069 t = t->txd_next ;
2070 tx_used-- ;
2071 }
2072 }
2073
2074 /*
2075 * release all TxD's for both send queues
2076 */
2077 mac_drv_clear_txd(smc) ;
2078
2079 for (i = QUEUE_S; i <= QUEUE_A0; i++) {
2080 queue = smc->hw.fp.tx[i] ;
2081 t = queue->tx_curr_get ;
2082
2083 /*
2084 * write the phys pointer of the NEXT descriptor into the
2085 * BMU's current address descriptor pointer and set
2086 * tx_curr_get and tx_curr_put to this position
2087 */
2088 if (i == QUEUE_S) {
2089 outpd(ADDR(B5_XS_DA),AIX_REVERSE(t->txd_ntdadr)) ;
2090 }
2091 else {
2092 outpd(ADDR(B5_XA_DA),AIX_REVERSE(t->txd_ntdadr)) ;
2093 }
2094
2095 queue->tx_curr_put = queue->tx_curr_get->txd_next ;
2096 queue->tx_curr_get = queue->tx_curr_put ;
2097 }
2098 }
2099
2100
2101 /*
2102 -------------------------------------------------------------
2103 TEST FUNCTIONS:
2104 -------------------------------------------------------------
2105 */
2106
2107 #ifdef DEBUG
2108 /*
2109 * BEGIN_MANUAL_ENTRY(mac_drv_debug_lev)
2110 * void mac_drv_debug_lev(smc,flag,lev)
2111 *
2112 * function DOWNCALL (drvsr.c)
2113 * To get a special debug info the user can assign a debug level
2114 * to any debug flag.
2115 *
2116 * para flag debug flag, possible values are:
2117 * = 0: reset all debug flags (the defined level is
2118 * ignored)
2119 * = 1: debug.d_smtf
2120 * = 2: debug.d_smt
2121 * = 3: debug.d_ecm
2122 * = 4: debug.d_rmt
2123 * = 5: debug.d_cfm
2124 * = 6: debug.d_pcm
2125 *
2126 * = 10: debug.d_os.hwm_rx (hardware module receive path)
2127 * = 11: debug.d_os.hwm_tx(hardware module transmit path)
2128 * = 12: debug.d_os.hwm_gen(hardware module general flag)
2129 *
2130 * lev debug level
2131 *
2132 * END_MANUAL_ENTRY
2133 */
2134 void mac_drv_debug_lev(struct s_smc *smc, int flag, int lev)
2135 {
2136 switch(flag) {
2137 case (int)NULL:
2138 DB_P.d_smtf = DB_P.d_smt = DB_P.d_ecm = DB_P.d_rmt = 0 ;
2139 DB_P.d_cfm = 0 ;
2140 DB_P.d_os.hwm_rx = DB_P.d_os.hwm_tx = DB_P.d_os.hwm_gen = 0 ;
2141 #ifdef SBA
2142 DB_P.d_sba = 0 ;
2143 #endif
2144 #ifdef ESS
2145 DB_P.d_ess = 0 ;
2146 #endif
2147 break ;
2148 case DEBUG_SMTF:
2149 DB_P.d_smtf = lev ;
2150 break ;
2151 case DEBUG_SMT:
2152 DB_P.d_smt = lev ;
2153 break ;
2154 case DEBUG_ECM:
2155 DB_P.d_ecm = lev ;
2156 break ;
2157 case DEBUG_RMT:
2158 DB_P.d_rmt = lev ;
2159 break ;
2160 case DEBUG_CFM:
2161 DB_P.d_cfm = lev ;
2162 break ;
2163 case DEBUG_PCM:
2164 DB_P.d_pcm = lev ;
2165 break ;
2166 case DEBUG_SBA:
2167 #ifdef SBA
2168 DB_P.d_sba = lev ;
2169 #endif
2170 break ;
2171 case DEBUG_ESS:
2172 #ifdef ESS
2173 DB_P.d_ess = lev ;
2174 #endif
2175 break ;
2176 case DB_HWM_RX:
2177 DB_P.d_os.hwm_rx = lev ;
2178 break ;
2179 case DB_HWM_TX:
2180 DB_P.d_os.hwm_tx = lev ;
2181 break ;
2182 case DB_HWM_GEN:
2183 DB_P.d_os.hwm_gen = lev ;
2184 break ;
2185 default:
2186 break ;
2187 }
2188 }
2189 #endif
A Kernel for the Dreambox dm7025.