Merge commit 'v2.6.28-rc2' into topic/asoc
[linux-2.6] / drivers / net / skfp / hwmtm.c
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)    (__le32)(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 = cpu_to_le32(BMU_CHECK) ;
347                 d2->r.rxd_next = &d1->r ;
348                 phys = mac_drv_virt2phys(smc,(void *)d1) ;
349                 d2->r.rxd_nrdadr = cpu_to_le32(phys) ;
350         }
351         DB_GEN("descr ring ends at = %x ",(void *)d1,0,3) ;
352         d1->r.rxd_rbctrl = cpu_to_le32(BMU_CHECK) ;
353         d1->r.rxd_next = &start->r ;
354         phys = mac_drv_virt2phys(smc,(void *)start) ;
355         d1->r.rxd_nrdadr = cpu_to_le32(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 = le32_to_cpu(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 = le32_to_cpu(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 = le32_to_cpu(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 = le32_to_cpu(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 = le32_to_cpu(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 &= ~cpu_to_le32(BMU_OWN) ;
626                         }
627                 }
628                 phys = le32_to_cpu(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 = le32_to_cpu(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 = le32_to_cpu(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 &= ~cpu_to_le32(BMU_OWN) ;
678                         }
679                 }
680                 phys = le32_to_cpu(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 = le32_to_cpu(CR_READ(r->rxd_rbctrl));
1098
1099                         if (rbctrl & BMU_OWN) {
1100                                 NDD_TRACE("RHxE",r,rfsw,rbctrl) ;
1101                                 DB_RX("End of RxDs",0,0,4) ;
1102                                 goto rx_end ;
1103                         }
1104                         /*
1105                          * out of RxD detection
1106                          */
1107                         if (!rx_used) {
1108                                 SK_BREAK() ;
1109                                 SMT_PANIC(smc,HWM_E0009,HWM_E0009_MSG) ;
1110                                 /* Either we don't have an RxD or all
1111                                  * RxDs are filled. Therefore it's allowed
1112                                  * for to set the STOPPED flag */
1113                                 smc->hw.hw_state = STOPPED ;
1114                                 mac_drv_clear_rx_queue(smc) ;
1115                                 smc->hw.hw_state = STARTED ;
1116                                 mac_drv_fill_rxd(smc) ;
1117                                 smc->os.hwm.detec_count = 0 ;
1118                                 goto rx_end ;
1119                         }
1120                         rfsw = le32_to_cpu(r->rxd_rfsw) ;
1121                         if ((rbctrl & BMU_STF) != ((rbctrl & BMU_ST_BUF) <<5)) {
1122                                 /*
1123                                  * The BMU_STF bit is deleted, 1 frame is
1124                                  * placed into more than 1 rx buffer
1125                                  *
1126                                  * skip frame by setting the rx len to 0
1127                                  *
1128                                  * if fragment count == 0
1129                                  *      The missing STF bit belongs to the
1130                                  *      current frame, search for the
1131                                  *      EOF bit to complete the frame
1132                                  * else
1133                                  *      the fragment belongs to the next frame,
1134                                  *      exit the loop and process the frame
1135                                  */
1136                                 SK_BREAK() ;
1137                                 rfsw = 0 ;
1138                                 if (frag_count) {
1139                                         break ;
1140                                 }
1141                         }
1142                         n += rbctrl & 0xffff ;
1143                         r = r->rxd_next ;
1144                         frag_count++ ;
1145                         rx_used-- ;
1146                 } while (!(rbctrl & BMU_EOF)) ;
1147                 used_frags = frag_count ;
1148                 DB_RX("EOF set in RxD, used_frags = %d ",used_frags,0,5) ;
1149
1150                 /* may be next 2 DRV_BUF_FLUSH() can be skipped, because */
1151                 /* BMU_ST_BUF will not be changed by the ASIC */
1152                 DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
1153                 while (rx_used && !(r->rxd_rbctrl & cpu_to_le32(BMU_ST_BUF))) {
1154                         DB_RX("Check STF bit in %x",(void *)r,0,5) ;
1155                         r = r->rxd_next ;
1156                         DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
1157                         frag_count++ ;
1158                         rx_used-- ;
1159                 }
1160                 DB_RX("STF bit found",0,0,5) ;
1161
1162                 /*
1163                  * The received frame is finished for the process receive
1164                  */
1165                 rxd = queue->rx_curr_get ;
1166                 queue->rx_curr_get = r ;
1167                 queue->rx_free += frag_count ;
1168                 queue->rx_used = rx_used ;
1169
1170                 /*
1171                  * ASIC Errata no. 7 (STF - Bit Bug)
1172                  */
1173                 rxd->rxd_rbctrl &= cpu_to_le32(~BMU_STF) ;
1174
1175                 for (r=rxd, i=frag_count ; i ; r=r->rxd_next, i--){
1176                         DB_RX("dma_complete for RxD %x",(void *)r,0,5) ;
1177                         dma_complete(smc,(union s_fp_descr volatile *)r,DMA_WR);
1178                 }
1179                 smc->hw.fp.err_stats.err_valid++ ;
1180                 smc->mib.m[MAC0].fddiMACCopied_Ct++ ;
1181
1182                 /* the length of the data including the FC */
1183                 len = (rfsw & RD_LENGTH) - 4 ;
1184
1185                 DB_RX("frame length = %d",len,0,4) ;
1186                 /*
1187                  * check the frame_length and all error flags
1188                  */
1189                 if (rfsw & (RX_MSRABT|RX_FS_E|RX_FS_CRC|RX_FS_IMPL)){
1190                         if (rfsw & RD_S_MSRABT) {
1191                                 DB_RX("Frame aborted by the FORMAC",0,0,2) ;
1192                                 smc->hw.fp.err_stats.err_abort++ ;
1193                         }
1194                         /*
1195                          * check frame status
1196                          */
1197                         if (rfsw & RD_S_SEAC2) {
1198                                 DB_RX("E-Indicator set",0,0,2) ;
1199                                 smc->hw.fp.err_stats.err_e_indicator++ ;
1200                         }
1201                         if (rfsw & RD_S_SFRMERR) {
1202                                 DB_RX("CRC error",0,0,2) ;
1203                                 smc->hw.fp.err_stats.err_crc++ ;
1204                         }
1205                         if (rfsw & RX_FS_IMPL) {
1206                                 DB_RX("Implementer frame",0,0,2) ;
1207                                 smc->hw.fp.err_stats.err_imp_frame++ ;
1208                         }
1209                         goto abort_frame ;
1210                 }
1211                 if (len > FDDI_RAW_MTU-4) {
1212                         DB_RX("Frame too long error",0,0,2) ;
1213                         smc->hw.fp.err_stats.err_too_long++ ;
1214                         goto abort_frame ;
1215                 }
1216                 /*
1217                  * SUPERNET 3 Bug: FORMAC delivers status words
1218                  * of aborded frames to the BMU
1219                  */
1220                 if (len <= 4) {
1221                         DB_RX("Frame length = 0",0,0,2) ;
1222                         goto abort_frame ;
1223                 }
1224
1225                 if (len != (n-4)) {
1226                         DB_RX("BMU: rx len differs: [%d:%d]",len,n,4);
1227                         smc->os.hwm.rx_len_error++ ;
1228                         goto abort_frame ;
1229                 }
1230
1231                 /*
1232                  * Check SA == MA
1233                  */
1234                 virt = (u_char far *) rxd->rxd_virt ;
1235                 DB_RX("FC = %x",*virt,0,2) ;
1236                 if (virt[12] == MA[5] &&
1237                     virt[11] == MA[4] &&
1238                     virt[10] == MA[3] &&
1239                     virt[9] == MA[2] &&
1240                     virt[8] == MA[1] &&
1241                     (virt[7] & ~GROUP_ADDR_BIT) == MA[0]) {
1242                         goto abort_frame ;
1243                 }
1244
1245                 /*
1246                  * test if LLC frame
1247                  */
1248                 if (rfsw & RX_FS_LLC) {
1249                         /*
1250                          * if pass_llc_promisc is disable
1251                          *      if DA != Multicast or Broadcast or DA!=MA
1252                          *              abort the frame
1253                          */
1254                         if (!smc->os.hwm.pass_llc_promisc) {
1255                                 if(!(virt[1] & GROUP_ADDR_BIT)) {
1256                                         if (virt[6] != MA[5] ||
1257                                             virt[5] != MA[4] ||
1258                                             virt[4] != MA[3] ||
1259                                             virt[3] != MA[2] ||
1260                                             virt[2] != MA[1] ||
1261                                             virt[1] != MA[0]) {
1262                                                 DB_RX("DA != MA and not multi- or broadcast",0,0,2) ;
1263                                                 goto abort_frame ;
1264                                         }
1265                                 }
1266                         }
1267
1268                         /*
1269                          * LLC frame received
1270                          */
1271                         DB_RX("LLC - receive",0,0,4) ;
1272                         mac_drv_rx_complete(smc,rxd,frag_count,len) ;
1273                 }
1274                 else {
1275                         if (!(mb = smt_get_mbuf(smc))) {
1276                                 smc->hw.fp.err_stats.err_no_buf++ ;
1277                                 DB_RX("No SMbuf; receive terminated",0,0,4) ;
1278                                 goto abort_frame ;
1279                         }
1280                         data = smtod(mb,char *) - 1 ;
1281
1282                         /*
1283                          * copy the frame into a SMT_MBuf
1284                          */
1285 #ifdef USE_OS_CPY
1286                         hwm_cpy_rxd2mb(rxd,data,len) ;
1287 #else
1288                         for (r=rxd, i=used_frags ; i ; r=r->rxd_next, i--){
1289                                 n = le32_to_cpu(r->rxd_rbctrl) & RD_LENGTH ;
1290                                 DB_RX("cp SMT frame to mb: len = %d",n,0,6) ;
1291                                 memcpy(data,r->rxd_virt,n) ;
1292                                 data += n ;
1293                         }
1294                         data = smtod(mb,char *) - 1 ;
1295 #endif
1296                         fc = *(char *)mb->sm_data = *data ;
1297                         mb->sm_len = len - 1 ;          /* len - fc */
1298                         data++ ;
1299
1300                         /*
1301                          * SMT frame received
1302                          */
1303                         switch(fc) {
1304                         case FC_SMT_INFO :
1305                                 smc->hw.fp.err_stats.err_smt_frame++ ;
1306                                 DB_RX("SMT frame received ",0,0,5) ;
1307
1308                                 if (smc->os.hwm.pass_SMT) {
1309                                         DB_RX("pass SMT frame ",0,0,5) ;
1310                                         mac_drv_rx_complete(smc, rxd,
1311                                                 frag_count,len) ;
1312                                 }
1313                                 else {
1314                                         DB_RX("requeue RxD",0,0,5) ;
1315                                         mac_drv_requeue_rxd(smc,rxd,frag_count);
1316                                 }
1317
1318                                 smt_received_pack(smc,mb,(int)(rfsw>>25)) ;
1319                                 break ;
1320                         case FC_SMT_NSA :
1321                                 smc->hw.fp.err_stats.err_smt_frame++ ;
1322                                 DB_RX("SMT frame received ",0,0,5) ;
1323
1324                                 /* if pass_NSA set pass the NSA frame or */
1325                                 /* pass_SMT set and the A-Indicator */
1326                                 /* is not set, pass the NSA frame */
1327                                 if (smc->os.hwm.pass_NSA ||
1328                                         (smc->os.hwm.pass_SMT &&
1329                                         !(rfsw & A_INDIC))) {
1330                                         DB_RX("pass SMT frame ",0,0,5) ;
1331                                         mac_drv_rx_complete(smc, rxd,
1332                                                 frag_count,len) ;
1333                                 }
1334                                 else {
1335                                         DB_RX("requeue RxD",0,0,5) ;
1336                                         mac_drv_requeue_rxd(smc,rxd,frag_count);
1337                                 }
1338
1339                                 smt_received_pack(smc,mb,(int)(rfsw>>25)) ;
1340                                 break ;
1341                         case FC_BEACON :
1342                                 if (smc->os.hwm.pass_DB) {
1343                                         DB_RX("pass DB frame ",0,0,5) ;
1344                                         mac_drv_rx_complete(smc, rxd,
1345                                                 frag_count,len) ;
1346                                 }
1347                                 else {
1348                                         DB_RX("requeue RxD",0,0,5) ;
1349                                         mac_drv_requeue_rxd(smc,rxd,frag_count);
1350                                 }
1351                                 smt_free_mbuf(smc,mb) ;
1352                                 break ;
1353                         default :
1354                                 /*
1355                                  * unknown FC abord the frame
1356                                  */
1357                                 DB_RX("unknown FC error",0,0,2) ;
1358                                 smt_free_mbuf(smc,mb) ;
1359                                 DB_RX("requeue RxD",0,0,5) ;
1360                                 mac_drv_requeue_rxd(smc,rxd,frag_count) ;
1361                                 if ((fc & 0xf0) == FC_MAC)
1362                                         smc->hw.fp.err_stats.err_mac_frame++ ;
1363                                 else
1364                                         smc->hw.fp.err_stats.err_imp_frame++ ;
1365
1366                                 break ;
1367                         }
1368                 }
1369
1370                 DB_RX("next RxD is %x ",queue->rx_curr_get,0,3) ;
1371                 NDD_TRACE("RHx1",queue->rx_curr_get,0,0) ;
1372
1373                 continue ;
1374         /*--------------------------------------------------------------------*/
1375 abort_frame:
1376                 DB_RX("requeue RxD",0,0,5) ;
1377                 mac_drv_requeue_rxd(smc,rxd,frag_count) ;
1378
1379                 DB_RX("next RxD is %x ",queue->rx_curr_get,0,3) ;
1380                 NDD_TRACE("RHx2",queue->rx_curr_get,0,0) ;
1381         }
1382 rx_end:
1383 #ifdef  ALL_RX_COMPLETE
1384         mac_drv_all_receives_complete(smc) ;
1385 #endif
1386         return ;        /* lint bug: needs return detect end of function */
1387 }
1388
1389 static void smt_to_llc(struct s_smc *smc, SMbuf *mb)
1390 {
1391         u_char  fc ;
1392
1393         DB_RX("send a queued frame to the llc layer",0,0,4) ;
1394         smc->os.hwm.r.len = mb->sm_len ;
1395         smc->os.hwm.r.mb_pos = smtod(mb,char *) ;
1396         fc = *smc->os.hwm.r.mb_pos ;
1397         (void)mac_drv_rx_init(smc,(int)mb->sm_len,(int)fc,
1398                 smc->os.hwm.r.mb_pos,(int)mb->sm_len) ;
1399         smt_free_mbuf(smc,mb) ;
1400 }
1401
1402 /*
1403  *      BEGIN_MANUAL_ENTRY(hwm_rx_frag)
1404  *      void hwm_rx_frag(smc,virt,phys,len,frame_status)
1405  *
1406  * function     MACRO           (hardware module, hwmtm.h)
1407  *              This function calls dma_master for preparing the
1408  *              system hardware for the DMA transfer and initializes
1409  *              the current RxD with the length and the physical and
1410  *              virtual address of the fragment. Furthermore, it sets the
1411  *              STF and EOF bits depending on the frame status byte,
1412  *              switches the OWN flag of the RxD, so that it is owned by the
1413  *              adapter and issues an rx_start.
1414  *
1415  * para virt    virtual pointer to the fragment
1416  *      len     the length of the fragment
1417  *      frame_status    status of the frame, see design description
1418  *
1419  * NOTE:        It is possible to call this function with a fragment length
1420  *              of zero.
1421  *
1422  *      END_MANUAL_ENTRY
1423  */
1424 void hwm_rx_frag(struct s_smc *smc, char far *virt, u_long phys, int len,
1425                  int frame_status)
1426 {
1427         struct s_smt_fp_rxd volatile *r ;
1428         __le32  rbctrl;
1429
1430         NDD_TRACE("RHfB",virt,len,frame_status) ;
1431         DB_RX("hwm_rx_frag: len = %d, frame_status = %x\n",len,frame_status,2) ;
1432         r = smc->hw.fp.rx_q[QUEUE_R1].rx_curr_put ;
1433         r->rxd_virt = virt ;
1434         r->rxd_rbadr = cpu_to_le32(phys) ;
1435         rbctrl = cpu_to_le32( (((__u32)frame_status &
1436                 (FIRST_FRAG|LAST_FRAG))<<26) |
1437                 (((u_long) frame_status & FIRST_FRAG) << 21) |
1438                 BMU_OWN | BMU_CHECK | BMU_EN_IRQ_EOF | len) ;
1439         r->rxd_rbctrl = rbctrl ;
1440
1441         DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORDEV) ;
1442         outpd(ADDR(B0_R1_CSR),CSR_START) ;
1443         smc->hw.fp.rx_q[QUEUE_R1].rx_free-- ;
1444         smc->hw.fp.rx_q[QUEUE_R1].rx_used++ ;
1445         smc->hw.fp.rx_q[QUEUE_R1].rx_curr_put = r->rxd_next ;
1446         NDD_TRACE("RHfE",r,le32_to_cpu(r->rxd_rbadr),0) ;
1447 }
1448
1449 /*
1450  *      BEGINN_MANUAL_ENTRY(mac_drv_clear_rx_queue)
1451  *
1452  * void mac_drv_clear_rx_queue(smc)
1453  * struct s_smc *smc ;
1454  *
1455  * function     DOWNCALL        (hardware module, hwmtm.c)
1456  *              mac_drv_clear_rx_queue is called by the OS-specific module
1457  *              after it has issued a card_stop.
1458  *              In this case, the frames in the receive queue are obsolete and
1459  *              should be removed. For removing mac_drv_clear_rx_queue
1460  *              calls dma_master for each RxD and mac_drv_clear_rxd for each
1461  *              receive buffer.
1462  *
1463  * NOTE:        calling sequence card_stop:
1464  *              CLI_FBI(), card_stop(),
1465  *              mac_drv_clear_tx_queue(), mac_drv_clear_rx_queue(),
1466  *
1467  * NOTE:        The caller is responsible that the BMUs are idle
1468  *              when this function is called.
1469  *
1470  *      END_MANUAL_ENTRY
1471  */
1472 void mac_drv_clear_rx_queue(struct s_smc *smc)
1473 {
1474         struct s_smt_fp_rxd volatile *r ;
1475         struct s_smt_fp_rxd volatile *next_rxd ;
1476         struct s_smt_rx_queue *queue ;
1477         int frag_count ;
1478         int i ;
1479
1480         if (smc->hw.hw_state != STOPPED) {
1481                 SK_BREAK() ;
1482                 SMT_PANIC(smc,HWM_E0012,HWM_E0012_MSG) ;
1483                 return ;
1484         }
1485
1486         queue = smc->hw.fp.rx[QUEUE_R1] ;
1487         DB_RX("clear_rx_queue",0,0,5) ;
1488
1489         /*
1490          * dma_complete and mac_drv_clear_rxd for all RxDs / receive buffers
1491          */
1492         r = queue->rx_curr_get ;
1493         while (queue->rx_used) {
1494                 DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
1495                 DB_RX("switch OWN bit of RxD 0x%x ",r,0,5) ;
1496                 r->rxd_rbctrl &= ~cpu_to_le32(BMU_OWN) ;
1497                 frag_count = 1 ;
1498                 DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORDEV) ;
1499                 r = r->rxd_next ;
1500                 DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
1501                 while (r != queue->rx_curr_put &&
1502                         !(r->rxd_rbctrl & cpu_to_le32(BMU_ST_BUF))) {
1503                         DB_RX("Check STF bit in %x",(void *)r,0,5) ;
1504                         r->rxd_rbctrl &= ~cpu_to_le32(BMU_OWN) ;
1505                         DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORDEV) ;
1506                         r = r->rxd_next ;
1507                         DRV_BUF_FLUSH(r,DDI_DMA_SYNC_FORCPU) ;
1508                         frag_count++ ;
1509                 }
1510                 DB_RX("STF bit found",0,0,5) ;
1511                 next_rxd = r ;
1512
1513                 for (r=queue->rx_curr_get,i=frag_count; i ; r=r->rxd_next,i--){
1514                         DB_RX("dma_complete for RxD %x",(void *)r,0,5) ;
1515                         dma_complete(smc,(union s_fp_descr volatile *)r,DMA_WR);
1516                 }
1517
1518                 DB_RX("mac_drv_clear_rxd: RxD %x frag_count %d ",
1519                         (void *)queue->rx_curr_get,frag_count,5) ;
1520                 mac_drv_clear_rxd(smc,queue->rx_curr_get,frag_count) ;
1521
1522                 queue->rx_curr_get = next_rxd ;
1523                 queue->rx_used -= frag_count ;
1524                 queue->rx_free += frag_count ;
1525         }
1526 }
1527
1528
1529 /*
1530         -------------------------------------------------------------
1531         SEND FUNCTIONS:
1532         -------------------------------------------------------------
1533 */
1534
1535 /*
1536  *      BEGIN_MANUAL_ENTRY(hwm_tx_init)
1537  *      int hwm_tx_init(smc,fc,frag_count,frame_len,frame_status)
1538  *
1539  * function     DOWN_CALL       (hardware module, hwmtm.c)
1540  *              hwm_tx_init checks if the frame can be sent through the
1541  *              corresponding send queue.
1542  *
1543  * para fc      the frame control. To determine through which
1544  *              send queue the frame should be transmitted.
1545  *              0x50 - 0x57:    asynchronous LLC frame
1546  *              0xD0 - 0xD7:    synchronous LLC frame
1547  *              0x41, 0x4F:     SMT frame to the network
1548  *              0x42:           SMT frame to the network and to the local SMT
1549  *              0x43:           SMT frame to the local SMT
1550  *      frag_count      count of the fragments for this frame
1551  *      frame_len       length of the frame
1552  *      frame_status    status of the frame, the send queue bit is already
1553  *                      specified
1554  *
1555  * return               frame_status
1556  *
1557  *      END_MANUAL_ENTRY
1558  */
1559 int hwm_tx_init(struct s_smc *smc, u_char fc, int frag_count, int frame_len,
1560                 int frame_status)
1561 {
1562         NDD_TRACE("THiB",fc,frag_count,frame_len) ;
1563         smc->os.hwm.tx_p = smc->hw.fp.tx[frame_status & QUEUE_A0] ;
1564         smc->os.hwm.tx_descr = TX_DESCRIPTOR | (((u_long)(frame_len-1)&3)<<27) ;
1565         smc->os.hwm.tx_len = frame_len ;
1566         DB_TX("hwm_tx_init: fc = %x, len = %d",fc,frame_len,3) ;
1567         if ((fc & ~(FC_SYNC_BIT|FC_LLC_PRIOR)) == FC_ASYNC_LLC) {
1568                 frame_status |= LAN_TX ;
1569         }
1570         else {
1571                 switch (fc) {
1572                 case FC_SMT_INFO :
1573                 case FC_SMT_NSA :
1574                         frame_status |= LAN_TX ;
1575                         break ;
1576                 case FC_SMT_LOC :
1577                         frame_status |= LOC_TX ;
1578                         break ;
1579                 case FC_SMT_LAN_LOC :
1580                         frame_status |= LAN_TX | LOC_TX ;
1581                         break ;
1582                 default :
1583                         SMT_PANIC(smc,HWM_E0010,HWM_E0010_MSG) ;
1584                 }
1585         }
1586         if (!smc->hw.mac_ring_is_up) {
1587                 frame_status &= ~LAN_TX ;
1588                 frame_status |= RING_DOWN ;
1589                 DB_TX("Ring is down: terminate LAN_TX",0,0,2) ;
1590         }
1591         if (frag_count > smc->os.hwm.tx_p->tx_free) {
1592 #ifndef NDIS_OS2
1593                 mac_drv_clear_txd(smc) ;
1594                 if (frag_count > smc->os.hwm.tx_p->tx_free) {
1595                         DB_TX("Out of TxDs, terminate LAN_TX",0,0,2) ;
1596                         frame_status &= ~LAN_TX ;
1597                         frame_status |= OUT_OF_TXD ;
1598                 }
1599 #else
1600                 DB_TX("Out of TxDs, terminate LAN_TX",0,0,2) ;
1601                 frame_status &= ~LAN_TX ;
1602                 frame_status |= OUT_OF_TXD ;
1603 #endif
1604         }
1605         DB_TX("frame_status = %x",frame_status,0,3) ;
1606         NDD_TRACE("THiE",frame_status,smc->os.hwm.tx_p->tx_free,0) ;
1607         return(frame_status) ;
1608 }
1609
1610 /*
1611  *      BEGIN_MANUAL_ENTRY(hwm_tx_frag)
1612  *      void hwm_tx_frag(smc,virt,phys,len,frame_status)
1613  *
1614  * function     DOWNCALL        (hardware module, hwmtm.c)
1615  *              If the frame should be sent to the LAN, this function calls
1616  *              dma_master, fills the current TxD with the virtual and the
1617  *              physical address, sets the STF and EOF bits dependent on
1618  *              the frame status, and requests the BMU to start the
1619  *              transmit.
1620  *              If the frame should be sent to the local SMT, an SMT_MBuf
1621  *              is allocated if the FIRST_FRAG bit is set in the frame_status.
1622  *              The fragment of the frame is copied into the SMT MBuf.
1623  *              The function smt_received_pack is called if the LAST_FRAG
1624  *              bit is set in the frame_status word.
1625  *
1626  * para virt    virtual pointer to the fragment
1627  *      len     the length of the fragment
1628  *      frame_status    status of the frame, see design description
1629  *
1630  * return       nothing returned, no parameter is modified
1631  *
1632  * NOTE:        It is possible to invoke this macro with a fragment length
1633  *              of zero.
1634  *
1635  *      END_MANUAL_ENTRY
1636  */
1637 void hwm_tx_frag(struct s_smc *smc, char far *virt, u_long phys, int len,
1638                  int frame_status)
1639 {
1640         struct s_smt_fp_txd volatile *t ;
1641         struct s_smt_tx_queue *queue ;
1642         __le32  tbctrl ;
1643
1644         queue = smc->os.hwm.tx_p ;
1645
1646         NDD_TRACE("THfB",virt,len,frame_status) ;
1647         /* Bug fix: AF / May 31 1999 (#missing)
1648          * snmpinfo problem reported by IBM is caused by invalid
1649          * t-pointer (txd) if LAN_TX is not set but LOC_TX only.
1650          * Set: t = queue->tx_curr_put  here !
1651          */
1652         t = queue->tx_curr_put ;
1653
1654         DB_TX("hwm_tx_frag: len = %d, frame_status = %x ",len,frame_status,2) ;
1655         if (frame_status & LAN_TX) {
1656                 /* '*t' is already defined */
1657                 DB_TX("LAN_TX: TxD = %x, virt = %x ",t,virt,3) ;
1658                 t->txd_virt = virt ;
1659                 t->txd_txdscr = cpu_to_le32(smc->os.hwm.tx_descr) ;
1660                 t->txd_tbadr = cpu_to_le32(phys) ;
1661                 tbctrl = cpu_to_le32((((__u32)frame_status &
1662                         (FIRST_FRAG|LAST_FRAG|EN_IRQ_EOF))<< 26) |
1663                         BMU_OWN|BMU_CHECK |len) ;
1664                 t->txd_tbctrl = tbctrl ;
1665
1666 #ifndef AIX
1667                 DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORDEV) ;
1668                 outpd(queue->tx_bmu_ctl,CSR_START) ;
1669 #else   /* ifndef AIX */
1670                 DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORDEV) ;
1671                 if (frame_status & QUEUE_A0) {
1672                         outpd(ADDR(B0_XA_CSR),CSR_START) ;
1673                 }
1674                 else {
1675                         outpd(ADDR(B0_XS_CSR),CSR_START) ;
1676                 }
1677 #endif
1678                 queue->tx_free-- ;
1679                 queue->tx_used++ ;
1680                 queue->tx_curr_put = t->txd_next ;
1681                 if (frame_status & LAST_FRAG) {
1682                         smc->mib.m[MAC0].fddiMACTransmit_Ct++ ;
1683                 }
1684         }
1685         if (frame_status & LOC_TX) {
1686                 DB_TX("LOC_TX: ",0,0,3) ;
1687                 if (frame_status & FIRST_FRAG) {
1688                         if(!(smc->os.hwm.tx_mb = smt_get_mbuf(smc))) {
1689                                 smc->hw.fp.err_stats.err_no_buf++ ;
1690                                 DB_TX("No SMbuf; transmit terminated",0,0,4) ;
1691                         }
1692                         else {
1693                                 smc->os.hwm.tx_data =
1694                                         smtod(smc->os.hwm.tx_mb,char *) - 1 ;
1695 #ifdef USE_OS_CPY
1696 #ifdef PASS_1ST_TXD_2_TX_COMP
1697                                 hwm_cpy_txd2mb(t,smc->os.hwm.tx_data,
1698                                         smc->os.hwm.tx_len) ;
1699 #endif
1700 #endif
1701                         }
1702                 }
1703                 if (smc->os.hwm.tx_mb) {
1704 #ifndef USE_OS_CPY
1705                         DB_TX("copy fragment into MBuf ",0,0,3) ;
1706                         memcpy(smc->os.hwm.tx_data,virt,len) ;
1707                         smc->os.hwm.tx_data += len ;
1708 #endif
1709                         if (frame_status & LAST_FRAG) {
1710 #ifdef  USE_OS_CPY
1711 #ifndef PASS_1ST_TXD_2_TX_COMP
1712                                 /*
1713                                  * hwm_cpy_txd2mb(txd,data,len) copies 'len' 
1714                                  * bytes from the virtual pointer in 'rxd'
1715                                  * to 'data'. The virtual pointer of the 
1716                                  * os-specific tx-buffer should be written
1717                                  * in the LAST txd.
1718                                  */ 
1719                                 hwm_cpy_txd2mb(t,smc->os.hwm.tx_data,
1720                                         smc->os.hwm.tx_len) ;
1721 #endif  /* nPASS_1ST_TXD_2_TX_COMP */
1722 #endif  /* USE_OS_CPY */
1723                                 smc->os.hwm.tx_data =
1724                                         smtod(smc->os.hwm.tx_mb,char *) - 1 ;
1725                                 *(char *)smc->os.hwm.tx_mb->sm_data =
1726                                         *smc->os.hwm.tx_data ;
1727                                 smc->os.hwm.tx_data++ ;
1728                                 smc->os.hwm.tx_mb->sm_len =
1729                                         smc->os.hwm.tx_len - 1 ;
1730                                 DB_TX("pass LLC frame to SMT ",0,0,3) ;
1731                                 smt_received_pack(smc,smc->os.hwm.tx_mb,
1732                                                 RD_FS_LOCAL) ;
1733                         }
1734                 }
1735         }
1736         NDD_TRACE("THfE",t,queue->tx_free,0) ;
1737 }
1738
1739
1740 /*
1741  * queues a receive for later send
1742  */
1743 static void queue_llc_rx(struct s_smc *smc, SMbuf *mb)
1744 {
1745         DB_GEN("queue_llc_rx: mb = %x",(void *)mb,0,4) ;
1746         smc->os.hwm.queued_rx_frames++ ;
1747         mb->sm_next = (SMbuf *)NULL ;
1748         if (smc->os.hwm.llc_rx_pipe == NULL) {
1749                 smc->os.hwm.llc_rx_pipe = mb ;
1750         }
1751         else {
1752                 smc->os.hwm.llc_rx_tail->sm_next = mb ;
1753         }
1754         smc->os.hwm.llc_rx_tail = mb ;
1755
1756         /*
1757          * force an timer IRQ to receive the data
1758          */
1759         if (!smc->os.hwm.isr_flag) {
1760                 smt_force_irq(smc) ;
1761         }
1762 }
1763
1764 /*
1765  * get a SMbuf from the llc_rx_queue
1766  */
1767 static SMbuf *get_llc_rx(struct s_smc *smc)
1768 {
1769         SMbuf   *mb ;
1770
1771         if ((mb = smc->os.hwm.llc_rx_pipe)) {
1772                 smc->os.hwm.queued_rx_frames-- ;
1773                 smc->os.hwm.llc_rx_pipe = mb->sm_next ;
1774         }
1775         DB_GEN("get_llc_rx: mb = 0x%x",(void *)mb,0,4) ;
1776         return(mb) ;
1777 }
1778
1779 /*
1780  * queues a transmit SMT MBuf during the time were the MBuf is
1781  * queued the TxD ring
1782  */
1783 static void queue_txd_mb(struct s_smc *smc, SMbuf *mb)
1784 {
1785         DB_GEN("_rx: queue_txd_mb = %x",(void *)mb,0,4) ;
1786         smc->os.hwm.queued_txd_mb++ ;
1787         mb->sm_next = (SMbuf *)NULL ;
1788         if (smc->os.hwm.txd_tx_pipe == NULL) {
1789                 smc->os.hwm.txd_tx_pipe = mb ;
1790         }
1791         else {
1792                 smc->os.hwm.txd_tx_tail->sm_next = mb ;
1793         }
1794         smc->os.hwm.txd_tx_tail = mb ;
1795 }
1796
1797 /*
1798  * get a SMbuf from the txd_tx_queue
1799  */
1800 static SMbuf *get_txd_mb(struct s_smc *smc)
1801 {
1802         SMbuf *mb ;
1803
1804         if ((mb = smc->os.hwm.txd_tx_pipe)) {
1805                 smc->os.hwm.queued_txd_mb-- ;
1806                 smc->os.hwm.txd_tx_pipe = mb->sm_next ;
1807         }
1808         DB_GEN("get_txd_mb: mb = 0x%x",(void *)mb,0,4) ;
1809         return(mb) ;
1810 }
1811
1812 /*
1813  *      SMT Send function
1814  */
1815 void smt_send_mbuf(struct s_smc *smc, SMbuf *mb, int fc)
1816 {
1817         char far *data ;
1818         int     len ;
1819         int     n ;
1820         int     i ;
1821         int     frag_count ;
1822         int     frame_status ;
1823         SK_LOC_DECL(char far,*virt[3]) ;
1824         int     frag_len[3] ;
1825         struct s_smt_tx_queue *queue ;
1826         struct s_smt_fp_txd volatile *t ;
1827         u_long  phys ;
1828         __le32  tbctrl;
1829
1830         NDD_TRACE("THSB",mb,fc,0) ;
1831         DB_TX("smt_send_mbuf: mb = 0x%x, fc = 0x%x",mb,fc,4) ;
1832
1833         mb->sm_off-- ;  /* set to fc */
1834         mb->sm_len++ ;  /* + fc */
1835         data = smtod(mb,char *) ;
1836         *data = fc ;
1837         if (fc == FC_SMT_LOC)
1838                 *data = FC_SMT_INFO ;
1839
1840         /*
1841          * determine the frag count and the virt addresses of the frags
1842          */
1843         frag_count = 0 ;
1844         len = mb->sm_len ;
1845         while (len) {
1846                 n = SMT_PAGESIZE - ((long)data & (SMT_PAGESIZE-1)) ;
1847                 if (n >= len) {
1848                         n = len ;
1849                 }
1850                 DB_TX("frag: virt/len = 0x%x/%d ",(void *)data,n,5) ;
1851                 virt[frag_count] = data ;
1852                 frag_len[frag_count] = n ;
1853                 frag_count++ ;
1854                 len -= n ;
1855                 data += n ;
1856         }
1857
1858         /*
1859          * determine the frame status
1860          */
1861         queue = smc->hw.fp.tx[QUEUE_A0] ;
1862         if (fc == FC_BEACON || fc == FC_SMT_LOC) {
1863                 frame_status = LOC_TX ;
1864         }
1865         else {
1866                 frame_status = LAN_TX ;
1867                 if ((smc->os.hwm.pass_NSA &&(fc == FC_SMT_NSA)) ||
1868                    (smc->os.hwm.pass_SMT &&(fc == FC_SMT_INFO)))
1869                         frame_status |= LOC_TX ;
1870         }
1871
1872         if (!smc->hw.mac_ring_is_up || frag_count > queue->tx_free) {
1873                 frame_status &= ~LAN_TX;
1874                 if (frame_status) {
1875                         DB_TX("Ring is down: terminate LAN_TX",0,0,2) ;
1876                 }
1877                 else {
1878                         DB_TX("Ring is down: terminate transmission",0,0,2) ;
1879                         smt_free_mbuf(smc,mb) ;
1880                         return ;
1881                 }
1882         }
1883         DB_TX("frame_status = 0x%x ",frame_status,0,5) ;
1884
1885         if ((frame_status & LAN_TX) && (frame_status & LOC_TX)) {
1886                 mb->sm_use_count = 2 ;
1887         }
1888
1889         if (frame_status & LAN_TX) {
1890                 t = queue->tx_curr_put ;
1891                 frame_status |= FIRST_FRAG ;
1892                 for (i = 0; i < frag_count; i++) {
1893                         DB_TX("init TxD = 0x%x",(void *)t,0,5) ;
1894                         if (i == frag_count-1) {
1895                                 frame_status |= LAST_FRAG ;
1896                                 t->txd_txdscr = cpu_to_le32(TX_DESCRIPTOR |
1897                                         (((__u32)(mb->sm_len-1)&3) << 27)) ;
1898                         }
1899                         t->txd_virt = virt[i] ;
1900                         phys = dma_master(smc, (void far *)virt[i],
1901                                 frag_len[i], DMA_RD|SMT_BUF) ;
1902                         t->txd_tbadr = cpu_to_le32(phys) ;
1903                         tbctrl = cpu_to_le32((((__u32)frame_status &
1904                                 (FIRST_FRAG|LAST_FRAG)) << 26) |
1905                                 BMU_OWN | BMU_CHECK | BMU_SMT_TX |frag_len[i]) ;
1906                         t->txd_tbctrl = tbctrl ;
1907 #ifndef AIX
1908                         DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORDEV) ;
1909                         outpd(queue->tx_bmu_ctl,CSR_START) ;
1910 #else
1911                         DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORDEV) ;
1912                         outpd(ADDR(B0_XA_CSR),CSR_START) ;
1913 #endif
1914                         frame_status &= ~FIRST_FRAG ;
1915                         queue->tx_curr_put = t = t->txd_next ;
1916                         queue->tx_free-- ;
1917                         queue->tx_used++ ;
1918                 }
1919                 smc->mib.m[MAC0].fddiMACTransmit_Ct++ ;
1920                 queue_txd_mb(smc,mb) ;
1921         }
1922
1923         if (frame_status & LOC_TX) {
1924                 DB_TX("pass Mbuf to LLC queue",0,0,5) ;
1925                 queue_llc_rx(smc,mb) ;
1926         }
1927
1928         /*
1929          * We need to unqueue the free SMT_MBUFs here, because it may
1930          * be that the SMT want's to send more than 1 frame for one down call
1931          */
1932         mac_drv_clear_txd(smc) ;
1933         NDD_TRACE("THSE",t,queue->tx_free,frag_count) ;
1934 }
1935
1936 /*      BEGIN_MANUAL_ENTRY(mac_drv_clear_txd)
1937  *      void mac_drv_clear_txd(smc)
1938  *
1939  * function     DOWNCALL        (hardware module, hwmtm.c)
1940  *              mac_drv_clear_txd searches in both send queues for TxD's
1941  *              which were finished by the adapter. It calls dma_complete
1942  *              for each TxD. If the last fragment of an LLC frame is
1943  *              reached, it calls mac_drv_tx_complete to release the
1944  *              send buffer.
1945  *
1946  * return       nothing
1947  *
1948  *      END_MANUAL_ENTRY
1949  */
1950 static void mac_drv_clear_txd(struct s_smc *smc)
1951 {
1952         struct s_smt_tx_queue *queue ;
1953         struct s_smt_fp_txd volatile *t1 ;
1954         struct s_smt_fp_txd volatile *t2 = NULL ;
1955         SMbuf *mb ;
1956         u_long  tbctrl ;
1957         int i ;
1958         int frag_count ;
1959         int n ;
1960
1961         NDD_TRACE("THcB",0,0,0) ;
1962         for (i = QUEUE_S; i <= QUEUE_A0; i++) {
1963                 queue = smc->hw.fp.tx[i] ;
1964                 t1 = queue->tx_curr_get ;
1965                 DB_TX("clear_txd: QUEUE = %d (0=sync/1=async)",i,0,5) ;
1966
1967                 for ( ; ; ) {
1968                         frag_count = 0 ;
1969
1970                         do {
1971                                 DRV_BUF_FLUSH(t1,DDI_DMA_SYNC_FORCPU) ;
1972                                 DB_TX("check OWN/EOF bit of TxD 0x%x",t1,0,5) ;
1973                                 tbctrl = le32_to_cpu(CR_READ(t1->txd_tbctrl));
1974
1975                                 if (tbctrl & BMU_OWN || !queue->tx_used){
1976                                         DB_TX("End of TxDs queue %d",i,0,4) ;
1977                                         goto free_next_queue ;  /* next queue */
1978                                 }
1979                                 t1 = t1->txd_next ;
1980                                 frag_count++ ;
1981                         } while (!(tbctrl & BMU_EOF)) ;
1982
1983                         t1 = queue->tx_curr_get ;
1984                         for (n = frag_count; n; n--) {
1985                                 tbctrl = le32_to_cpu(t1->txd_tbctrl) ;
1986                                 dma_complete(smc,
1987                                         (union s_fp_descr volatile *) t1,
1988                                         (int) (DMA_RD |
1989                                         ((tbctrl & BMU_SMT_TX) >> 18))) ;
1990                                 t2 = t1 ;
1991                                 t1 = t1->txd_next ;
1992                         }
1993
1994                         if (tbctrl & BMU_SMT_TX) {
1995                                 mb = get_txd_mb(smc) ;
1996                                 smt_free_mbuf(smc,mb) ;
1997                         }
1998                         else {
1999 #ifndef PASS_1ST_TXD_2_TX_COMP
2000                                 DB_TX("mac_drv_tx_comp for TxD 0x%x",t2,0,4) ;
2001                                 mac_drv_tx_complete(smc,t2) ;
2002 #else
2003                                 DB_TX("mac_drv_tx_comp for TxD 0x%x",
2004                                         queue->tx_curr_get,0,4) ;
2005                                 mac_drv_tx_complete(smc,queue->tx_curr_get) ;
2006 #endif
2007                         }
2008                         queue->tx_curr_get = t1 ;
2009                         queue->tx_free += frag_count ;
2010                         queue->tx_used -= frag_count ;
2011                 }
2012 free_next_queue: ;
2013         }
2014         NDD_TRACE("THcE",0,0,0) ;
2015 }
2016
2017 /*
2018  *      BEGINN_MANUAL_ENTRY(mac_drv_clear_tx_queue)
2019  *
2020  * void mac_drv_clear_tx_queue(smc)
2021  * struct s_smc *smc ;
2022  *
2023  * function     DOWNCALL        (hardware module, hwmtm.c)
2024  *              mac_drv_clear_tx_queue is called from the SMT when
2025  *              the RMT state machine has entered the ISOLATE state.
2026  *              This function is also called by the os-specific module
2027  *              after it has called the function card_stop().
2028  *              In this case, the frames in the send queues are obsolete and
2029  *              should be removed.
2030  *
2031  * note         calling sequence:
2032  *              CLI_FBI(), card_stop(),
2033  *              mac_drv_clear_tx_queue(), mac_drv_clear_rx_queue(),
2034  *
2035  * NOTE:        The caller is responsible that the BMUs are idle
2036  *              when this function is called.
2037  *
2038  *      END_MANUAL_ENTRY
2039  */
2040 void mac_drv_clear_tx_queue(struct s_smc *smc)
2041 {
2042         struct s_smt_fp_txd volatile *t ;
2043         struct s_smt_tx_queue *queue ;
2044         int tx_used ;
2045         int i ;
2046
2047         if (smc->hw.hw_state != STOPPED) {
2048                 SK_BREAK() ;
2049                 SMT_PANIC(smc,HWM_E0011,HWM_E0011_MSG) ;
2050                 return ;
2051         }
2052
2053         for (i = QUEUE_S; i <= QUEUE_A0; i++) {
2054                 queue = smc->hw.fp.tx[i] ;
2055                 DB_TX("clear_tx_queue: QUEUE = %d (0=sync/1=async)",i,0,5) ;
2056
2057                 /*
2058                  * switch the OWN bit of all pending frames to the host
2059                  */
2060                 t = queue->tx_curr_get ;
2061                 tx_used = queue->tx_used ;
2062                 while (tx_used) {
2063                         DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORCPU) ;
2064                         DB_TX("switch OWN bit of TxD 0x%x ",t,0,5) ;
2065                         t->txd_tbctrl &= ~cpu_to_le32(BMU_OWN) ;
2066                         DRV_BUF_FLUSH(t,DDI_DMA_SYNC_FORDEV) ;
2067                         t = t->txd_next ;
2068                         tx_used-- ;
2069                 }
2070         }
2071
2072         /*
2073          * release all TxD's for both send queues
2074          */
2075         mac_drv_clear_txd(smc) ;
2076
2077         for (i = QUEUE_S; i <= QUEUE_A0; i++) {
2078                 queue = smc->hw.fp.tx[i] ;
2079                 t = queue->tx_curr_get ;
2080
2081                 /*
2082                  * write the phys pointer of the NEXT descriptor into the
2083                  * BMU's current address descriptor pointer and set
2084                  * tx_curr_get and tx_curr_put to this position
2085                  */
2086                 if (i == QUEUE_S) {
2087                         outpd(ADDR(B5_XS_DA),le32_to_cpu(t->txd_ntdadr)) ;
2088                 }
2089                 else {
2090                         outpd(ADDR(B5_XA_DA),le32_to_cpu(t->txd_ntdadr)) ;
2091                 }
2092
2093                 queue->tx_curr_put = queue->tx_curr_get->txd_next ;
2094                 queue->tx_curr_get = queue->tx_curr_put ;
2095         }
2096 }
2097
2098
2099 /*
2100         -------------------------------------------------------------
2101         TEST FUNCTIONS:
2102         -------------------------------------------------------------
2103 */
2104
2105 #ifdef  DEBUG
2106 /*
2107  *      BEGIN_MANUAL_ENTRY(mac_drv_debug_lev)
2108  *      void mac_drv_debug_lev(smc,flag,lev)
2109  *
2110  * function     DOWNCALL        (drvsr.c)
2111  *              To get a special debug info the user can assign a debug level
2112  *              to any debug flag.
2113  *
2114  * para flag    debug flag, possible values are:
2115  *                      = 0:    reset all debug flags (the defined level is
2116  *                              ignored)
2117  *                      = 1:    debug.d_smtf
2118  *                      = 2:    debug.d_smt
2119  *                      = 3:    debug.d_ecm
2120  *                      = 4:    debug.d_rmt
2121  *                      = 5:    debug.d_cfm
2122  *                      = 6:    debug.d_pcm
2123  *
2124  *                      = 10:   debug.d_os.hwm_rx (hardware module receive path)
2125  *                      = 11:   debug.d_os.hwm_tx(hardware module transmit path)
2126  *                      = 12:   debug.d_os.hwm_gen(hardware module general flag)
2127  *
2128  *      lev     debug level
2129  *
2130  *      END_MANUAL_ENTRY
2131  */
2132 void mac_drv_debug_lev(struct s_smc *smc, int flag, int lev)
2133 {
2134         switch(flag) {
2135         case (int)NULL:
2136                 DB_P.d_smtf = DB_P.d_smt = DB_P.d_ecm = DB_P.d_rmt = 0 ;
2137                 DB_P.d_cfm = 0 ;
2138                 DB_P.d_os.hwm_rx = DB_P.d_os.hwm_tx = DB_P.d_os.hwm_gen = 0 ;
2139 #ifdef  SBA
2140                 DB_P.d_sba = 0 ;
2141 #endif
2142 #ifdef  ESS
2143                 DB_P.d_ess = 0 ;
2144 #endif
2145                 break ;
2146         case DEBUG_SMTF:
2147                 DB_P.d_smtf = lev ;
2148                 break ;
2149         case DEBUG_SMT:
2150                 DB_P.d_smt = lev ;
2151                 break ;
2152         case DEBUG_ECM:
2153                 DB_P.d_ecm = lev ;
2154                 break ;
2155         case DEBUG_RMT:
2156                 DB_P.d_rmt = lev ;
2157                 break ;
2158         case DEBUG_CFM:
2159                 DB_P.d_cfm = lev ;
2160                 break ;
2161         case DEBUG_PCM:
2162                 DB_P.d_pcm = lev ;
2163                 break ;
2164         case DEBUG_SBA:
2165 #ifdef  SBA
2166                 DB_P.d_sba = lev ;
2167 #endif
2168                 break ;
2169         case DEBUG_ESS:
2170 #ifdef  ESS
2171                 DB_P.d_ess = lev ;
2172 #endif
2173                 break ;
2174         case DB_HWM_RX:
2175                 DB_P.d_os.hwm_rx = lev ;
2176                 break ;
2177         case DB_HWM_TX:
2178                 DB_P.d_os.hwm_tx = lev ;
2179                 break ;
2180         case DB_HWM_GEN:
2181                 DB_P.d_os.hwm_gen = lev ;
2182                 break ;
2183         default:
2184                 break ;
2185         }
2186 }
2187 #endif