1 /* ibmtr.c: A shared-memory IBM Token Ring 16/4 driver for linux
2 *
3 * Written 1993 by Mark Swanson and Peter De Schrijver.
4 * This software may be used and distributed according to the terms
5 * of the GNU General Public License, incorporated herein by reference.
6 *
7 * This device driver should work with Any IBM Token Ring Card that does
8 * not use DMA.
9 *
10 * I used Donald Becker's (becker@scyld.com) device driver work
11 * as a base for most of my initial work.
12 *
13 * Changes by Peter De Schrijver
14 * (Peter.Deschrijver@linux.cc.kuleuven.ac.be) :
15 *
16 * + changed name to ibmtr.c in anticipation of other tr boards.
17 * + changed reset code and adapter open code.
18 * + added SAP open code.
19 * + a first attempt to write interrupt, transmit and receive routines.
20 *
21 * Changes by David W. Morris (dwm@shell.portal.com) :
22 * 941003 dwm: - Restructure tok_probe for multiple adapters, devices.
23 * + Add comments, misc reorg for clarity.
24 * + Flatten interrupt handler levels.
25 *
26 * Changes by Farzad Farid (farzy@zen.via.ecp.fr)
27 * and Pascal Andre (andre@chimay.via.ecp.fr) (March 9 1995) :
28 * + multi ring support clean up.
29 * + RFC1042 compliance enhanced.
30 *
31 * Changes by Pascal Andre (andre@chimay.via.ecp.fr) (September 7 1995) :
32 * + bug correction in tr_tx
33 * + removed redundant information display
34 * + some code reworking
35 *
36 * Changes by Michel Lespinasse (walken@via.ecp.fr),
37 * Yann Doussot (doussot@via.ecp.fr) and Pascal Andre (andre@via.ecp.fr)
38 * (February 18, 1996) :
39 * + modified shared memory and mmio access port the driver to
40 * alpha platform (structure access -> readb/writeb)
41 *
42 * Changes by Steve Kipisz (bungy@ibm.net or kipisz@vnet.ibm.com)
43 * (January 18 1996):
44 * + swapped WWOR and WWCR in ibmtr.h
45 * + moved some init code from tok_probe into trdev_init. The
46 * PCMCIA code can call trdev_init to complete initializing
47 * the driver.
48 * + added -DPCMCIA to support PCMCIA
49 * + detecting PCMCIA Card Removal in interrupt handler. If
50 * ISRP is FF, then a PCMCIA card has been removed
51 * 10/2000 Burt needed a new method to avoid crashing the OS
52 *
53 * Changes by Paul Norton (pnorton@cts.com) :
54 * + restructured the READ.LOG logic to prevent the transmit SRB
55 * from being rudely overwritten before the transmit cycle is
56 * complete. (August 15 1996)
57 * + completed multiple adapter support. (November 20 1996)
58 * + implemented csum_partial_copy in tr_rx and increased receive
59 * buffer size and count. Minor fixes. (March 15, 1997)
60 *
61 * Changes by Christopher Turcksin <wabbit@rtfc.demon.co.uk>
62 * + Now compiles ok as a module again.
63 *
64 * Changes by Paul Norton (pnorton@ieee.org) :
65 * + moved the header manipulation code in tr_tx and tr_rx to
66 * net/802/tr.c. (July 12 1997)
67 * + add retry and timeout on open if cable disconnected. (May 5 1998)
68 * + lifted 2000 byte mtu limit. now depends on shared-RAM size.
69 * May 25 1998)
70 * + can't allocate 2k recv buff at 8k shared-RAM. (20 October 1998)
71 *
72 * Changes by Joel Sloan (jjs@c-me.com) :
73 * + disable verbose debug messages by default - to enable verbose
74 * debugging, edit the IBMTR_DEBUG_MESSAGES define below
75 *
76 * Changes by Mike Phillips <phillim@amtrak.com> :
77 * + Added extra #ifdef's to work with new PCMCIA Token Ring Code.
78 * The PCMCIA code now just sets up the card so it can be recognized
79 * by ibmtr_probe. Also checks allocated memory vs. on-board memory
80 * for correct figure to use.
81 *
82 * Changes by Tim Hockin (thockin@isunix.it.ilstu.edu) :
83 * + added spinlocks for SMP sanity (10 March 1999)
84 *
85 * Changes by Jochen Friedrich to enable RFC1469 Option 2 multicasting
86 * i.e. using functional address C0 00 00 04 00 00 to transmit and
87 * receive multicast packets.
88 *
89 * Changes by Mike Sullivan (based on original sram patch by Dave Grothe
90 * to support windowing into on adapter shared ram.
91 * i.e. Use LANAID to setup a PnP configuration with 16K RAM. Paging
92 * will shift this 16K window over the entire available shared RAM.
93 *
94 * Changes by Peter De Schrijver (p2@mind.be) :
95 * + fixed a problem with PCMCIA card removal
96 *
97 * Change by Mike Sullivan et al.:
98 * + added turbo card support. No need to use lanaid to configure
99 * the adapter into isa compatiblity mode.
100 *
101 * Changes by Burt Silverman to allow the computer to behave nicely when
102 * a cable is pulled or not in place, or a PCMCIA card is removed hot.
103 */
104
105 /* change the define of IBMTR_DEBUG_MESSAGES to a nonzero value
106 in the event that chatty debug messages are desired - jjs 12/30/98 */
107
108 #define IBMTR_DEBUG_MESSAGES 0
109
110 #include <linux/module.h>
111
112 #ifdef PCMCIA /* required for ibmtr_cs.c to build */
113 #undef MODULE /* yes, really */
114 #undef ENABLE_PAGING
115 #else
116 #define ENABLE_PAGING 1
117 #endif
118
119 /* changes the output format of driver initialization */
120 #define TR_VERBOSE 0
121
122 /* some 95 OS send many non UI frame; this allow removing the warning */
123 #define TR_FILTERNONUI 1
124
125 #include <linux/ioport.h>
126 #include <linux/netdevice.h>
127 #include <linux/ip.h>
128 #include <linux/trdevice.h>
129 #include <linux/ibmtr.h>
130
131 #include <net/checksum.h>
132
133 #include <asm/io.h>
134
135 #define DPRINTK(format, args...) printk("%s: " format, dev->name , ## args)
136 #define DPRINTD(format, args...) DummyCall("%s: " format, dev->name , ## args)
137
138 /* version and credits */
139 #ifndef PCMCIA
140 static char version[] __devinitdata =
141 "\nibmtr.c: v1.3.57 8/ 7/94 Peter De Schrijver and Mark Swanson\n"
142 " v2.1.125 10/20/98 Paul Norton <pnorton@ieee.org>\n"
143 " v2.2.0 12/30/98 Joel Sloan <jjs@c-me.com>\n"
144 " v2.2.1 02/08/00 Mike Sullivan <sullivam@us.ibm.com>\n"
145 " v2.2.2 07/27/00 Burt Silverman <burts@us.ibm.com>\n"
146 " v2.4.0 03/01/01 Mike Sullivan <sullivan@us.ibm.com>\n";
147 #endif
148
149 /* this allows displaying full adapter information */
150
151 static char *channel_def[] __devinitdata = { "ISA", "MCA", "ISA P&P" };
152
153 static char pcchannelid[] __devinitdata = {
154 0x05, 0x00, 0x04, 0x09,
155 0x04, 0x03, 0x04, 0x0f,
156 0x03, 0x06, 0x03, 0x01,
157 0x03, 0x01, 0x03, 0x00,
158 0x03, 0x09, 0x03, 0x09,
159 0x03, 0x00, 0x02, 0x00
160 };
161
162 static char mcchannelid[] __devinitdata = {
163 0x04, 0x0d, 0x04, 0x01,
164 0x05, 0x02, 0x05, 0x03,
165 0x03, 0x06, 0x03, 0x03,
166 0x05, 0x08, 0x03, 0x04,
167 0x03, 0x05, 0x03, 0x01,
168 0x03, 0x08, 0x02, 0x00
169 };
170
adapter_def(char type)171 static char __devinit *adapter_def(char type)
172 {
173 switch (type) {
174 case 0xF: return "PC Adapter | PC Adapter II | Adapter/A";
175 case 0xE: return "16/4 Adapter | 16/4 Adapter/A (long)";
176 case 0xD: return "16/4 Adapter/A (short) | 16/4 ISA-16 Adapter";
177 case 0xC: return "Auto 16/4 Adapter";
178 default: return "adapter (unknown type)";
179 };
180 };
181
182 #define TRC_INIT 0x01 /* Trace initialization & PROBEs */
183 #define TRC_INITV 0x02 /* verbose init trace points */
184 static unsigned char ibmtr_debug_trace = 0;
185
186 static int ibmtr_probe1(struct net_device *dev, int ioaddr);
187 static unsigned char get_sram_size(struct tok_info *adapt_info);
188 static int trdev_init(struct net_device *dev);
189 static int tok_open(struct net_device *dev);
190 static int tok_init_card(struct net_device *dev);
191 static void tok_open_adapter(unsigned long dev_addr);
192 static void open_sap(unsigned char type, struct net_device *dev);
193 static void tok_set_multicast_list(struct net_device *dev);
194 static int tok_send_packet(struct sk_buff *skb, struct net_device *dev);
195 static int tok_close(struct net_device *dev);
196 static irqreturn_t tok_interrupt(int irq, void *dev_id);
197 static void initial_tok_int(struct net_device *dev);
198 static void tr_tx(struct net_device *dev);
199 static void tr_rx(struct net_device *dev);
200 static void ibmtr_reset_timer(struct timer_list*tmr,struct net_device *dev);
201 static void tok_rerun(unsigned long dev_addr);
202 static void ibmtr_readlog(struct net_device *dev);
203 static struct net_device_stats *tok_get_stats(struct net_device *dev);
204 static int ibmtr_change_mtu(struct net_device *dev, int mtu);
205 static void find_turbo_adapters(int *iolist);
206
207 static int ibmtr_portlist[IBMTR_MAX_ADAPTERS+1] __devinitdata = {
208 0xa20, 0xa24, 0, 0, 0
209 };
210 static int __devinitdata turbo_io[IBMTR_MAX_ADAPTERS] = {0};
211 static int __devinitdata turbo_irq[IBMTR_MAX_ADAPTERS] = {0};
212 static int __devinitdata turbo_searched = 0;
213
214 #ifndef PCMCIA
215 static __u32 ibmtr_mem_base __devinitdata = 0xd0000;
216 #endif
217
PrtChanID(char * pcid,short stride)218 static void __devinit PrtChanID(char *pcid, short stride)
219 {
220 short i, j;
221 for (i = 0, j = 0; i < 24; i++, j += stride)
222 printk("%1x", ((int) pcid[j]) & 0x0f);
223 printk("\n");
224 }
225
HWPrtChanID(void __iomem * pcid,short stride)226 static void __devinit HWPrtChanID(void __iomem *pcid, short stride)
227 {
228 short i, j;
229 for (i = 0, j = 0; i < 24; i++, j += stride)
230 printk("%1x", ((int) readb(pcid + j)) & 0x0f);
231 printk("\n");
232 }
233
234 /* We have to ioremap every checked address, because isa_readb is
235 * going away.
236 */
237
find_turbo_adapters(int * iolist)238 static void __devinit find_turbo_adapters(int *iolist)
239 {
240 int ram_addr;
241 int index=0;
242 void __iomem *chanid;
243 int found_turbo=0;
244 unsigned char *tchanid, ctemp;
245 int i, j;
246 unsigned long jif;
247 void __iomem *ram_mapped ;
248
249 if (turbo_searched == 1) return;
250 turbo_searched=1;
251 for (ram_addr=0xC0000; ram_addr < 0xE0000; ram_addr+=0x2000) {
252
253 __u32 intf_tbl=0;
254
255 found_turbo=1;
256 ram_mapped = ioremap((u32)ram_addr,0x1fff) ;
257 if (ram_mapped==NULL)
258 continue ;
259 chanid=(CHANNEL_ID + ram_mapped);
260 tchanid=pcchannelid;
261 ctemp=readb(chanid) & 0x0f;
262 if (ctemp != *tchanid) continue;
263 for (i=2,j=1; i<=46; i=i+2,j++) {
264 if ((readb(chanid+i) & 0x0f) != tchanid[j]){
265 found_turbo=0;
266 break;
267 }
268 }
269 if (!found_turbo) continue;
270
271 writeb(0x90, ram_mapped+0x1E01);
272 for(i=2; i<0x0f; i++) {
273 writeb(0x00, ram_mapped+0x1E01+i);
274 }
275 writeb(0x00, ram_mapped+0x1E01);
276 for(jif=jiffies+TR_BUSY_INTERVAL; time_before_eq(jiffies,jif););
277 intf_tbl=ntohs(readw(ram_mapped+ACA_OFFSET+ACA_RW+WRBR_EVEN));
278 if (intf_tbl) {
279 #if IBMTR_DEBUG_MESSAGES
280 printk("ibmtr::find_turbo_adapters, Turbo found at "
281 "ram_addr %x\n",ram_addr);
282 printk("ibmtr::find_turbo_adapters, interface_table ");
283 for(i=0; i<6; i++) {
284 printk("%x:",readb(ram_addr+intf_tbl+i));
285 }
286 printk("\n");
287 #endif
288 turbo_io[index]=ntohs(readw(ram_mapped+intf_tbl+4));
289 turbo_irq[index]=readb(ram_mapped+intf_tbl+3);
290 outb(0, turbo_io[index] + ADAPTRESET);
291 for(jif=jiffies+TR_RST_TIME;time_before_eq(jiffies,jif););
292 outb(0, turbo_io[index] + ADAPTRESETREL);
293 index++;
294 continue;
295 }
296 #if IBMTR_DEBUG_MESSAGES
297 printk("ibmtr::find_turbo_adapters, ibmtr card found at"
298 " %x but not a Turbo model\n",ram_addr);
299 #endif
300 iounmap(ram_mapped) ;
301 } /* for */
302 for(i=0; i<IBMTR_MAX_ADAPTERS; i++) {
303 if(!turbo_io[i]) break;
304 for (j=0; j<IBMTR_MAX_ADAPTERS; j++) {
305 if ( iolist[j] && iolist[j] != turbo_io[i]) continue;
306 iolist[j]=turbo_io[i];
307 break;
308 }
309 }
310 }
311
ibmtr_cleanup_card(struct net_device * dev)312 static void ibmtr_cleanup_card(struct net_device *dev)
313 {
314 if (dev->base_addr) {
315 outb(0,dev->base_addr+ADAPTRESET);
316
317 schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */
318
319 outb(0,dev->base_addr+ADAPTRESETREL);
320 }
321
322 #ifndef PCMCIA
323 free_irq(dev->irq, dev);
324 release_region(dev->base_addr, IBMTR_IO_EXTENT);
325
326 {
327 struct tok_info *ti = netdev_priv(dev);
328 iounmap(ti->mmio);
329 iounmap(ti->sram_virt);
330 }
331 #endif
332 }
333
334 /****************************************************************************
335 * ibmtr_probe(): Routine specified in the network device structure
336 * to probe for an IBM Token Ring Adapter. Routine outline:
337 * I. Interrogate hardware to determine if an adapter exists
338 * and what the speeds and feeds are
339 * II. Setup data structures to control execution based upon
340 * adapter characteristics.
341 *
342 * We expect ibmtr_probe to be called once for each device entry
343 * which references it.
344 ****************************************************************************/
345
ibmtr_probe(struct net_device * dev)346 static int __devinit ibmtr_probe(struct net_device *dev)
347 {
348 int i;
349 int base_addr = dev->base_addr;
350
351 if (base_addr && base_addr <= 0x1ff) /* Don't probe at all. */
352 return -ENXIO;
353 if (base_addr > 0x1ff) { /* Check a single specified location. */
354 if (!ibmtr_probe1(dev, base_addr)) return 0;
355 return -ENODEV;
356 }
357 find_turbo_adapters(ibmtr_portlist);
358 for (i = 0; ibmtr_portlist[i]; i++) {
359 int ioaddr = ibmtr_portlist[i];
360
361 if (!ibmtr_probe1(dev, ioaddr)) return 0;
362 }
363 return -ENODEV;
364 }
365
ibmtr_probe_card(struct net_device * dev)366 int __devinit ibmtr_probe_card(struct net_device *dev)
367 {
368 int err = ibmtr_probe(dev);
369 if (!err) {
370 err = register_netdev(dev);
371 if (err)
372 ibmtr_cleanup_card(dev);
373 }
374 return err;
375 }
376
377 /*****************************************************************************/
378
ibmtr_probe1(struct net_device * dev,int PIOaddr)379 static int __devinit ibmtr_probe1(struct net_device *dev, int PIOaddr)
380 {
381
382 unsigned char segment, intr=0, irq=0, i, j, cardpresent=NOTOK, temp=0;
383 void __iomem * t_mmio = NULL;
384 struct tok_info *ti = netdev_priv(dev);
385 void __iomem *cd_chanid;
386 unsigned char *tchanid, ctemp;
387 #ifndef PCMCIA
388 unsigned char t_irq=0;
389 unsigned long timeout;
390 static int version_printed;
391 #endif
392
393 /* Query the adapter PIO base port which will return
394 * indication of where MMIO was placed. We also have a
395 * coded interrupt number.
396 */
397 segment = inb(PIOaddr);
398 if (segment < 0x40 || segment > 0xe0) {
399 /* Out of range values so we'll assume non-existent IO device
400 * but this is not necessarily a problem, esp if a turbo
401 * adapter is being used. */
402 #if IBMTR_DEBUG_MESSAGES
403 DPRINTK("ibmtr_probe1(): unhappy that inb(0x%X) == 0x%X, "
404 "Hardware Problem?\n",PIOaddr,segment);
405 #endif
406 return -ENODEV;
407 }
408 /*
409 * Compute the linear base address of the MMIO area
410 * as LINUX doesn't care about segments
411 */
412 t_mmio = ioremap(((__u32) (segment & 0xfc) << 11) + 0x80000,2048);
413 if (!t_mmio) {
414 DPRINTK("Cannot remap mmiobase memory area") ;
415 return -ENODEV ;
416 }
417 intr = segment & 0x03; /* low bits is coded interrupt # */
418 if (ibmtr_debug_trace & TRC_INIT)
419 DPRINTK("PIOaddr: %4hx seg/intr: %2x mmio base: %p intr: %d\n"
420 , PIOaddr, (int) segment, t_mmio, (int) intr);
421
422 /*
423 * Now we will compare expected 'channelid' strings with
424 * what we is there to learn of ISA/MCA or not TR card
425 */
426 #ifdef PCMCIA
427 iounmap(t_mmio);
428 t_mmio = ti->mmio; /*BMS to get virtual address */
429 irq = ti->irq; /*BMS to display the irq! */
430 #endif
431 cd_chanid = (CHANNEL_ID + t_mmio); /* for efficiency */
432 tchanid = pcchannelid;
433 cardpresent = TR_ISA; /* try ISA */
434
435 /* Suboptimize knowing first byte different */
436 ctemp = readb(cd_chanid) & 0x0f;
437 if (ctemp != *tchanid) { /* NOT ISA card, try MCA */
438 tchanid = mcchannelid;
439 cardpresent = TR_MCA;
440 if (ctemp != *tchanid) /* Neither ISA nor MCA */
441 cardpresent = NOTOK;
442 }
443 if (cardpresent != NOTOK) {
444 /* Know presumed type, try rest of ID */
445 for (i = 2, j = 1; i <= 46; i = i + 2, j++) {
446 if( (readb(cd_chanid+i)&0x0f) == tchanid[j]) continue;
447 /* match failed, not TR card */
448 cardpresent = NOTOK;
449 break;
450 }
451 }
452 /*
453 * If we have an ISA board check for the ISA P&P version,
454 * as it has different IRQ settings
455 */
456 if (cardpresent == TR_ISA && (readb(AIPFID + t_mmio) == 0x0e))
457 cardpresent = TR_ISAPNP;
458 if (cardpresent == NOTOK) { /* "channel_id" did not match, report */
459 if (!(ibmtr_debug_trace & TRC_INIT)) {
460 #ifndef PCMCIA
461 iounmap(t_mmio);
462 #endif
463 return -ENODEV;
464 }
465 DPRINTK( "Channel ID string not found for PIOaddr: %4hx\n",
466 PIOaddr);
467 DPRINTK("Expected for ISA: ");
468 PrtChanID(pcchannelid, 1);
469 DPRINTK(" found: ");
470 /* BMS Note that this can be misleading, when hardware is flaky, because you
471 are reading it a second time here. So with my flaky hardware, I'll see my-
472 self in this block, with the HW ID matching the ISA ID exactly! */
473 HWPrtChanID(cd_chanid, 2);
474 DPRINTK("Expected for MCA: ");
475 PrtChanID(mcchannelid, 1);
476 }
477 /* Now, setup some of the pl0 buffers for this driver.. */
478 /* If called from PCMCIA, it is already set up, so no need to
479 waste the memory, just use the existing structure */
480 #ifndef PCMCIA
481 ti->mmio = t_mmio;
482 for (i = 0; i < IBMTR_MAX_ADAPTERS; i++) {
483 if (turbo_io[i] != PIOaddr)
484 continue;
485 #if IBMTR_DEBUG_MESSAGES
486 printk("ibmtr::tr_probe1, setting PIOaddr %x to Turbo\n",
487 PIOaddr);
488 #endif
489 ti->turbo = 1;
490 t_irq = turbo_irq[i];
491 }
492 #endif /* !PCMCIA */
493 ti->readlog_pending = 0;
494 init_waitqueue_head(&ti->wait_for_reset);
495
496 /* if PCMCIA, the card can be recognized as either TR_ISA or TR_ISAPNP
497 * depending which card is inserted. */
498
499 #ifndef PCMCIA
500 switch (cardpresent) {
501 case TR_ISA:
502 if (intr == 0) irq = 9; /* irq2 really is irq9 */
503 if (intr == 1) irq = 3;
504 if (intr == 2) irq = 6;
505 if (intr == 3) irq = 7;
506 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
507 break;
508 case TR_MCA:
509 if (intr == 0) irq = 9;
510 if (intr == 1) irq = 3;
511 if (intr == 2) irq = 10;
512 if (intr == 3) irq = 11;
513 ti->global_int_enable = 0;
514 ti->adapter_int_enable = 0;
515 ti->sram_phys=(__u32)(inb(PIOaddr+ADAPTRESETREL) & 0xfe) << 12;
516 break;
517 case TR_ISAPNP:
518 if (!t_irq) {
519 if (intr == 0) irq = 9;
520 if (intr == 1) irq = 3;
521 if (intr == 2) irq = 10;
522 if (intr == 3) irq = 11;
523 } else
524 irq=t_irq;
525 timeout = jiffies + TR_SPIN_INTERVAL;
526 while (!readb(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN)){
527 if (!time_after(jiffies, timeout)) continue;
528 DPRINTK( "Hardware timeout during initialization.\n");
529 iounmap(t_mmio);
530 return -ENODEV;
531 }
532 ti->sram_phys =
533 ((__u32)readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_EVEN)<<12);
534 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
535 break;
536 } /*end switch (cardpresent) */
537 #endif /*not PCMCIA */
538
539 if (ibmtr_debug_trace & TRC_INIT) { /* just report int */
540 DPRINTK("irq=%d", irq);
541 printk(", sram_phys=0x%x", ti->sram_phys);
542 if(ibmtr_debug_trace&TRC_INITV){ /* full chat in verbose only */
543 DPRINTK(", ti->mmio=%p", ti->mmio);
544 printk(", segment=%02X", segment);
545 }
546 printk(".\n");
547 }
548
549 /* Get hw address of token ring card */
550 j = 0;
551 for (i = 0; i < 0x18; i = i + 2) {
552 /* technical reference states to do this */
553 temp = readb(ti->mmio + AIP + i) & 0x0f;
554 ti->hw_address[j] = temp;
555 if (j & 1)
556 dev->dev_addr[(j / 2)] =
557 ti->hw_address[j]+ (ti->hw_address[j - 1] << 4);
558 ++j;
559 }
560 /* get Adapter type: 'F' = Adapter/A, 'E' = 16/4 Adapter II,... */
561 ti->adapter_type = readb(ti->mmio + AIPADAPTYPE);
562
563 /* get Data Rate: F=4Mb, E=16Mb, D=4Mb & 16Mb ?? */
564 ti->data_rate = readb(ti->mmio + AIPDATARATE);
565
566 /* Get Early Token Release support?: F=no, E=4Mb, D=16Mb, C=4&16Mb */
567 ti->token_release = readb(ti->mmio + AIPEARLYTOKEN);
568
569 /* How much shared RAM is on adapter ? */
570 if (ti->turbo) {
571 ti->avail_shared_ram=127;
572 } else {
573 ti->avail_shared_ram = get_sram_size(ti);/*in 512 byte units */
574 }
575 /* We need to set or do a bunch of work here based on previous results*/
576 /* Support paging? What sizes?: F=no, E=16k, D=32k, C=16 & 32k */
577 ti->shared_ram_paging = readb(ti->mmio + AIPSHRAMPAGE);
578
579 /* Available DHB 4Mb size: F=2048, E=4096, D=4464 */
580 switch (readb(ti->mmio + AIP4MBDHB)) {
581 case 0xe: ti->dhb_size4mb = 4096; break;
582 case 0xd: ti->dhb_size4mb = 4464; break;
583 default: ti->dhb_size4mb = 2048; break;
584 }
585
586 /* Available DHB 16Mb size: F=2048, E=4096, D=8192, C=16384, B=17960 */
587 switch (readb(ti->mmio + AIP16MBDHB)) {
588 case 0xe: ti->dhb_size16mb = 4096; break;
589 case 0xd: ti->dhb_size16mb = 8192; break;
590 case 0xc: ti->dhb_size16mb = 16384; break;
591 case 0xb: ti->dhb_size16mb = 17960; break;
592 default: ti->dhb_size16mb = 2048; break;
593 }
594
595 /* We must figure out how much shared memory space this adapter
596 * will occupy so that if there are two adapters we can fit both
597 * in. Given a choice, we will limit this adapter to 32K. The
598 * maximum space will will use for two adapters is 64K so if the
599 * adapter we are working on demands 64K (it also doesn't support
600 * paging), then only one adapter can be supported.
601 */
602
603 /*
604 * determine how much of total RAM is mapped into PC space
605 */
606 ti->mapped_ram_size= /*sixteen to onehundredtwentyeight 512byte blocks*/
607 1<< ((readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03) + 4);
608 ti->page_mask = 0;
609 if (ti->turbo) ti->page_mask=0xf0;
610 else if (ti->shared_ram_paging == 0xf); /* No paging in adapter */
611 else {
612 #ifdef ENABLE_PAGING
613 unsigned char pg_size = 0;
614 /* BMS: page size: PCMCIA, use configuration register;
615 ISAPNP, use LANAIDC config tool from www.ibm.com */
616 switch (ti->shared_ram_paging) {
617 case 0xf:
618 break;
619 case 0xe:
620 ti->page_mask = (ti->mapped_ram_size == 32) ? 0xc0 : 0;
621 pg_size = 32; /* 16KB page size */
622 break;
623 case 0xd:
624 ti->page_mask = (ti->mapped_ram_size == 64) ? 0x80 : 0;
625 pg_size = 64; /* 32KB page size */
626 break;
627 case 0xc:
628 switch (ti->mapped_ram_size) {
629 case 32:
630 ti->page_mask = 0xc0;
631 pg_size = 32;
632 break;
633 case 64:
634 ti->page_mask = 0x80;
635 pg_size = 64;
636 break;
637 }
638 break;
639 default:
640 DPRINTK("Unknown shared ram paging info %01X\n",
641 ti->shared_ram_paging);
642 iounmap(t_mmio);
643 return -ENODEV;
644 break;
645 } /*end switch shared_ram_paging */
646
647 if (ibmtr_debug_trace & TRC_INIT)
648 DPRINTK("Shared RAM paging code: %02X, "
649 "mapped RAM size: %dK, shared RAM size: %dK, "
650 "page mask: %02X\n:",
651 ti->shared_ram_paging, ti->mapped_ram_size / 2,
652 ti->avail_shared_ram / 2, ti->page_mask);
653 #endif /*ENABLE_PAGING */
654 }
655
656 #ifndef PCMCIA
657 /* finish figuring the shared RAM address */
658 if (cardpresent == TR_ISA) {
659 static __u32 ram_bndry_mask[] =
660 { 0xffffe000, 0xffffc000, 0xffff8000, 0xffff0000 };
661 __u32 new_base, rrr_32, chk_base, rbm;
662
663 rrr_32=readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03;
664 rbm = ram_bndry_mask[rrr_32];
665 new_base = (ibmtr_mem_base + (~rbm)) & rbm;/* up to boundary */
666 chk_base = new_base + (ti->mapped_ram_size << 9);
667 if (chk_base > (ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE)) {
668 DPRINTK("Shared RAM for this adapter (%05x) exceeds "
669 "driver limit (%05x), adapter not started.\n",
670 chk_base, ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE);
671 iounmap(t_mmio);
672 return -ENODEV;
673 } else { /* seems cool, record what we have figured out */
674 ti->sram_base = new_base >> 12;
675 ibmtr_mem_base = chk_base;
676 }
677 }
678 else ti->sram_base = ti->sram_phys >> 12;
679
680 /* The PCMCIA has already got the interrupt line and the io port,
681 so no chance of anybody else getting it - MLP */
682 if (request_irq(dev->irq = irq, &tok_interrupt, 0, "ibmtr", dev) != 0) {
683 DPRINTK("Could not grab irq %d. Halting Token Ring driver.\n",
684 irq);
685 iounmap(t_mmio);
686 return -ENODEV;
687 }
688 /*?? Now, allocate some of the PIO PORTs for this driver.. */
689 /* record PIOaddr range as busy */
690 if (!request_region(PIOaddr, IBMTR_IO_EXTENT, "ibmtr")) {
691 DPRINTK("Could not grab PIO range. Halting driver.\n");
692 free_irq(dev->irq, dev);
693 iounmap(t_mmio);
694 return -EBUSY;
695 }
696
697 if (!version_printed++) {
698 printk(version);
699 }
700 #endif /* !PCMCIA */
701 DPRINTK("%s %s found\n",
702 channel_def[cardpresent - 1], adapter_def(ti->adapter_type));
703 DPRINTK("using irq %d, PIOaddr %hx, %dK shared RAM.\n",
704 irq, PIOaddr, ti->mapped_ram_size / 2);
705 DPRINTK("Hardware address : %pM\n", dev->dev_addr);
706 if (ti->page_mask)
707 DPRINTK("Shared RAM paging enabled. "
708 "Page size: %uK Shared Ram size %dK\n",
709 ((ti->page_mask^0xff)+1) >>2, ti->avail_shared_ram / 2);
710 else
711 DPRINTK("Shared RAM paging disabled. ti->page_mask %x\n",
712 ti->page_mask);
713
714 /* Calculate the maximum DHB we can use */
715 /* two cases where avail_shared_ram doesn't equal mapped_ram_size:
716 1. avail_shared_ram is 127 but mapped_ram_size is 128 (typical)
717 2. user has configured adapter for less than avail_shared_ram
718 but is not using paging (she should use paging, I believe)
719 */
720 if (!ti->page_mask) {
721 ti->avail_shared_ram=
722 min(ti->mapped_ram_size,ti->avail_shared_ram);
723 }
724
725 switch (ti->avail_shared_ram) {
726 case 16: /* 8KB shared RAM */
727 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)2048);
728 ti->rbuf_len4 = 1032;
729 ti->rbuf_cnt4=2;
730 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)2048);
731 ti->rbuf_len16 = 1032;
732 ti->rbuf_cnt16=2;
733 break;
734 case 32: /* 16KB shared RAM */
735 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
736 ti->rbuf_len4 = 1032;
737 ti->rbuf_cnt4=4;
738 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)4096);
739 ti->rbuf_len16 = 1032; /*1024 usable */
740 ti->rbuf_cnt16=4;
741 break;
742 case 64: /* 32KB shared RAM */
743 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
744 ti->rbuf_len4 = 1032;
745 ti->rbuf_cnt4=6;
746 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)10240);
747 ti->rbuf_len16 = 1032;
748 ti->rbuf_cnt16=6;
749 break;
750 case 127: /* 63.5KB shared RAM */
751 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
752 ti->rbuf_len4 = 1032;
753 ti->rbuf_cnt4=6;
754 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)16384);
755 ti->rbuf_len16 = 1032;
756 ti->rbuf_cnt16=16;
757 break;
758 case 128: /* 64KB shared RAM */
759 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
760 ti->rbuf_len4 = 1032;
761 ti->rbuf_cnt4=6;
762 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)17960);
763 ti->rbuf_len16 = 1032;
764 ti->rbuf_cnt16=16;
765 break;
766 default:
767 ti->dhb_size4mb = 2048;
768 ti->rbuf_len4 = 1032;
769 ti->rbuf_cnt4=2;
770 ti->dhb_size16mb = 2048;
771 ti->rbuf_len16 = 1032;
772 ti->rbuf_cnt16=2;
773 break;
774 }
775 /* this formula is not smart enough for the paging case
776 ti->rbuf_cnt<x> = (ti->avail_shared_ram * BLOCKSZ - ADAPT_PRIVATE -
777 ARBLENGTH - SSBLENGTH - DLC_MAX_SAP * SAPLENGTH -
778 DLC_MAX_STA * STALENGTH - ti->dhb_size<x>mb * NUM_DHB -
779 SRBLENGTH - ASBLENGTH) / ti->rbuf_len<x>;
780 */
781 ti->maxmtu16 = (ti->rbuf_len16 - 8) * ti->rbuf_cnt16 - TR_HLEN;
782 ti->maxmtu4 = (ti->rbuf_len4 - 8) * ti->rbuf_cnt4 - TR_HLEN;
783 /*BMS assuming 18 bytes of Routing Information (usually works) */
784 DPRINTK("Maximum Receive Internet Protocol MTU 16Mbps: %d, 4Mbps: %d\n",
785 ti->maxmtu16, ti->maxmtu4);
786
787 dev->base_addr = PIOaddr; /* set the value for device */
788 dev->mem_start = ti->sram_base << 12;
789 dev->mem_end = dev->mem_start + (ti->mapped_ram_size << 9) - 1;
790 trdev_init(dev);
791 return 0; /* Return 0 to indicate we have found a Token Ring card. */
792 } /*ibmtr_probe1() */
793
794 /*****************************************************************************/
795
796 /* query the adapter for the size of shared RAM */
797 /* the function returns the RAM size in units of 512 bytes */
798
get_sram_size(struct tok_info * adapt_info)799 static unsigned char __devinit get_sram_size(struct tok_info *adapt_info)
800 {
801 unsigned char avail_sram_code;
802 static unsigned char size_code[] = { 0, 16, 32, 64, 127, 128 };
803 /* Adapter gives
804 'F' -- use RRR bits 3,2
805 'E' -- 8kb 'D' -- 16kb
806 'C' -- 32kb 'A' -- 64KB
807 'B' - 64KB less 512 bytes at top
808 (WARNING ... must zero top bytes in INIT */
809
810 avail_sram_code = 0xf - readb(adapt_info->mmio + AIPAVAILSHRAM);
811 if (avail_sram_code) return size_code[avail_sram_code];
812 else /* for code 'F', must compute size from RRR(3,2) bits */
813 return 1 <<
814 ((readb(adapt_info->mmio+ACA_OFFSET+ACA_RW+RRR_ODD)>>2&3)+4);
815 }
816
817 /*****************************************************************************/
818
trdev_init(struct net_device * dev)819 static int __devinit trdev_init(struct net_device *dev)
820 {
821 struct tok_info *ti = netdev_priv(dev);
822
823 SET_PAGE(ti->srb_page);
824 ti->open_failure = NO ;
825 dev->open = tok_open;
826 dev->stop = tok_close;
827 dev->hard_start_xmit = tok_send_packet;
828 dev->get_stats = tok_get_stats;
829 dev->set_multicast_list = tok_set_multicast_list;
830 dev->change_mtu = ibmtr_change_mtu;
831
832 return 0;
833 }
834
835 /*****************************************************************************/
836
tok_init_card(struct net_device * dev)837 static int tok_init_card(struct net_device *dev)
838 {
839 struct tok_info *ti;
840 short PIOaddr;
841 unsigned long i;
842
843 PIOaddr = dev->base_addr;
844 ti = netdev_priv(dev);
845 /* Special processing for first interrupt after reset */
846 ti->do_tok_int = FIRST_INT;
847 /* Reset adapter */
848 writeb(~INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
849 outb(0, PIOaddr + ADAPTRESET);
850
851 schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */
852
853 outb(0, PIOaddr + ADAPTRESETREL);
854 #ifdef ENABLE_PAGING
855 if (ti->page_mask)
856 writeb(SRPR_ENABLE_PAGING,ti->mmio+ACA_OFFSET+ACA_RW+SRPR_EVEN);
857 #endif
858 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
859 i = sleep_on_timeout(&ti->wait_for_reset, 4 * HZ);
860 return i? 0 : -EAGAIN;
861 }
862
863 /*****************************************************************************/
tok_open(struct net_device * dev)864 static int tok_open(struct net_device *dev)
865 {
866 struct tok_info *ti = netdev_priv(dev);
867 int i;
868
869 /*the case we were left in a failure state during a previous open */
870 if (ti->open_failure == YES) {
871 DPRINTK("Last time you were disconnected, how about now?\n");
872 printk("You can't insert with an ICS connector half-cocked.\n");
873 }
874
875 ti->open_status = CLOSED; /* CLOSED or OPEN */
876 ti->sap_status = CLOSED; /* CLOSED or OPEN */
877 ti->open_failure = NO; /* NO or YES */
878 ti->open_mode = MANUAL; /* MANUAL or AUTOMATIC */
879
880 ti->sram_phys &= ~1; /* to reverse what we do in tok_close */
881 /* init the spinlock */
882 spin_lock_init(&ti->lock);
883 init_timer(&ti->tr_timer);
884
885 i = tok_init_card(dev);
886 if (i) return i;
887
888 while (1){
889 tok_open_adapter((unsigned long) dev);
890 i= interruptible_sleep_on_timeout(&ti->wait_for_reset, 25 * HZ);
891 /* sig catch: estimate opening adapter takes more than .5 sec*/
892 if (i>(245*HZ)/10) break; /* fancier than if (i==25*HZ) */
893 if (i==0) break;
894 if (ti->open_status == OPEN && ti->sap_status==OPEN) {
895 netif_start_queue(dev);
896 DPRINTK("Adapter is up and running\n");
897 return 0;
898 }
899 i=schedule_timeout_interruptible(TR_RETRY_INTERVAL);
900 /* wait 30 seconds */
901 if(i!=0) break; /*prob. a signal, like the i>24*HZ case above */
902 }
903 outb(0, dev->base_addr + ADAPTRESET);/* kill pending interrupts*/
904 DPRINTK("TERMINATED via signal\n"); /*BMS useful */
905 return -EAGAIN;
906 }
907
908 /*****************************************************************************/
909
910 #define COMMAND_OFST 0
911 #define OPEN_OPTIONS_OFST 8
912 #define NUM_RCV_BUF_OFST 24
913 #define RCV_BUF_LEN_OFST 26
914 #define DHB_LENGTH_OFST 28
915 #define NUM_DHB_OFST 30
916 #define DLC_MAX_SAP_OFST 32
917 #define DLC_MAX_STA_OFST 33
918
tok_open_adapter(unsigned long dev_addr)919 static void tok_open_adapter(unsigned long dev_addr)
920 {
921 struct net_device *dev = (struct net_device *) dev_addr;
922 struct tok_info *ti;
923 int i;
924
925 ti = netdev_priv(dev);
926 SET_PAGE(ti->init_srb_page);
927 writeb(~SRB_RESP_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD);
928 for (i = 0; i < sizeof(struct dir_open_adapter); i++)
929 writeb(0, ti->init_srb + i);
930 writeb(DIR_OPEN_ADAPTER, ti->init_srb + COMMAND_OFST);
931 writew(htons(OPEN_PASS_BCON_MAC), ti->init_srb + OPEN_OPTIONS_OFST);
932 if (ti->ring_speed == 16) {
933 writew(htons(ti->dhb_size16mb), ti->init_srb + DHB_LENGTH_OFST);
934 writew(htons(ti->rbuf_cnt16), ti->init_srb + NUM_RCV_BUF_OFST);
935 writew(htons(ti->rbuf_len16), ti->init_srb + RCV_BUF_LEN_OFST);
936 } else {
937 writew(htons(ti->dhb_size4mb), ti->init_srb + DHB_LENGTH_OFST);
938 writew(htons(ti->rbuf_cnt4), ti->init_srb + NUM_RCV_BUF_OFST);
939 writew(htons(ti->rbuf_len4), ti->init_srb + RCV_BUF_LEN_OFST);
940 }
941 writeb(NUM_DHB, /* always 2 */ ti->init_srb + NUM_DHB_OFST);
942 writeb(DLC_MAX_SAP, ti->init_srb + DLC_MAX_SAP_OFST);
943 writeb(DLC_MAX_STA, ti->init_srb + DLC_MAX_STA_OFST);
944 ti->srb = ti->init_srb; /* We use this one in the interrupt handler */
945 ti->srb_page = ti->init_srb_page;
946 DPRINTK("Opening adapter: Xmit bfrs: %d X %d, Rcv bfrs: %d X %d\n",
947 readb(ti->init_srb + NUM_DHB_OFST),
948 ntohs(readw(ti->init_srb + DHB_LENGTH_OFST)),
949 ntohs(readw(ti->init_srb + NUM_RCV_BUF_OFST)),
950 ntohs(readw(ti->init_srb + RCV_BUF_LEN_OFST)));
951 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
952 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
953 }
954
955 /*****************************************************************************/
956
open_sap(unsigned char type,struct net_device * dev)957 static void open_sap(unsigned char type, struct net_device *dev)
958 {
959 int i;
960 struct tok_info *ti = netdev_priv(dev);
961
962 SET_PAGE(ti->srb_page);
963 for (i = 0; i < sizeof(struct dlc_open_sap); i++)
964 writeb(0, ti->srb + i);
965
966 #define MAX_I_FIELD_OFST 14
967 #define SAP_VALUE_OFST 16
968 #define SAP_OPTIONS_OFST 17
969 #define STATION_COUNT_OFST 18
970
971 writeb(DLC_OPEN_SAP, ti->srb + COMMAND_OFST);
972 writew(htons(MAX_I_FIELD), ti->srb + MAX_I_FIELD_OFST);
973 writeb(SAP_OPEN_IND_SAP | SAP_OPEN_PRIORITY, ti->srb+ SAP_OPTIONS_OFST);
974 writeb(SAP_OPEN_STATION_CNT, ti->srb + STATION_COUNT_OFST);
975 writeb(type, ti->srb + SAP_VALUE_OFST);
976 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
977 }
978
979
980 /*****************************************************************************/
981
tok_set_multicast_list(struct net_device * dev)982 static void tok_set_multicast_list(struct net_device *dev)
983 {
984 struct tok_info *ti = netdev_priv(dev);
985 struct dev_mc_list *mclist;
986 unsigned char address[4];
987
988 int i;
989
990 /*BMS the next line is CRUCIAL or you may be sad when you */
991 /*BMS ifconfig tr down or hot unplug a PCMCIA card ??hownowbrowncow*/
992 if (/*BMSHELPdev->start == 0 ||*/ ti->open_status != OPEN) return;
993 address[0] = address[1] = address[2] = address[3] = 0;
994 mclist = dev->mc_list;
995 for (i = 0; i < dev->mc_count; i++) {
996 address[0] |= mclist->dmi_addr[2];
997 address[1] |= mclist->dmi_addr[3];
998 address[2] |= mclist->dmi_addr[4];
999 address[3] |= mclist->dmi_addr[5];
1000 mclist = mclist->next;
1001 }
1002 SET_PAGE(ti->srb_page);
1003 for (i = 0; i < sizeof(struct srb_set_funct_addr); i++)
1004 writeb(0, ti->srb + i);
1005
1006 #define FUNCT_ADDRESS_OFST 6
1007
1008 writeb(DIR_SET_FUNC_ADDR, ti->srb + COMMAND_OFST);
1009 for (i = 0; i < 4; i++)
1010 writeb(address[i], ti->srb + FUNCT_ADDRESS_OFST + i);
1011 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1012 #if TR_VERBOSE
1013 DPRINTK("Setting functional address: ");
1014 for (i=0;i<4;i++) printk("%02X ", address[i]);
1015 printk("\n");
1016 #endif
1017 }
1018
1019 /*****************************************************************************/
1020
1021 #define STATION_ID_OFST 4
1022
tok_send_packet(struct sk_buff * skb,struct net_device * dev)1023 static int tok_send_packet(struct sk_buff *skb, struct net_device *dev)
1024 {
1025 struct tok_info *ti;
1026 unsigned long flags;
1027 ti = netdev_priv(dev);
1028
1029 netif_stop_queue(dev);
1030
1031 /* lock against other CPUs */
1032 spin_lock_irqsave(&(ti->lock), flags);
1033
1034 /* Save skb; we'll need it when the adapter asks for the data */
1035 ti->current_skb = skb;
1036 SET_PAGE(ti->srb_page);
1037 writeb(XMIT_UI_FRAME, ti->srb + COMMAND_OFST);
1038 writew(ti->exsap_station_id, ti->srb + STATION_ID_OFST);
1039 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1040 spin_unlock_irqrestore(&(ti->lock), flags);
1041 dev->trans_start = jiffies;
1042 return 0;
1043 }
1044
1045 /*****************************************************************************/
1046
tok_close(struct net_device * dev)1047 static int tok_close(struct net_device *dev)
1048 {
1049 struct tok_info *ti = netdev_priv(dev);
1050
1051 /* Important for PCMCIA hot unplug, otherwise, we'll pull the card, */
1052 /* unloading the module from memory, and then if a timer pops, ouch */
1053 del_timer_sync(&ti->tr_timer);
1054 outb(0, dev->base_addr + ADAPTRESET);
1055 ti->sram_phys |= 1;
1056 ti->open_status = CLOSED;
1057
1058 netif_stop_queue(dev);
1059 DPRINTK("Adapter is closed.\n");
1060 return 0;
1061 }
1062
1063 /*****************************************************************************/
1064
1065 #define RETCODE_OFST 2
1066 #define OPEN_ERROR_CODE_OFST 6
1067 #define ASB_ADDRESS_OFST 8
1068 #define SRB_ADDRESS_OFST 10
1069 #define ARB_ADDRESS_OFST 12
1070 #define SSB_ADDRESS_OFST 14
1071
1072 static char *printphase[]= {"Lobe media test","Physical insertion",
1073 "Address verification","Roll call poll","Request Parameters"};
1074 static char *printerror[]={"Function failure","Signal loss","Reserved",
1075 "Frequency error","Timeout","Ring failure","Ring beaconing",
1076 "Duplicate node address",
1077 "Parameter request-retry count exceeded","Remove received",
1078 "IMPL force received","Duplicate modifier",
1079 "No monitor detected","Monitor contention failed for RPL"};
1080
map_address(struct tok_info * ti,unsigned index,__u8 * page)1081 static void __iomem *map_address(struct tok_info *ti, unsigned index, __u8 *page)
1082 {
1083 if (ti->page_mask) {
1084 *page = (index >> 8) & ti->page_mask;
1085 index &= ~(ti->page_mask << 8);
1086 }
1087 return ti->sram_virt + index;
1088 }
1089
dir_open_adapter(struct net_device * dev)1090 static void dir_open_adapter (struct net_device *dev)
1091 {
1092 struct tok_info *ti = netdev_priv(dev);
1093 unsigned char ret_code;
1094 __u16 err;
1095
1096 ti->srb = map_address(ti,
1097 ntohs(readw(ti->init_srb + SRB_ADDRESS_OFST)),
1098 &ti->srb_page);
1099 ti->ssb = map_address(ti,
1100 ntohs(readw(ti->init_srb + SSB_ADDRESS_OFST)),
1101 &ti->ssb_page);
1102 ti->arb = map_address(ti,
1103 ntohs(readw(ti->init_srb + ARB_ADDRESS_OFST)),
1104 &ti->arb_page);
1105 ti->asb = map_address(ti,
1106 ntohs(readw(ti->init_srb + ASB_ADDRESS_OFST)),
1107 &ti->asb_page);
1108 ti->current_skb = NULL;
1109 ret_code = readb(ti->init_srb + RETCODE_OFST);
1110 err = ntohs(readw(ti->init_srb + OPEN_ERROR_CODE_OFST));
1111 if (!ret_code) {
1112 ti->open_status = OPEN; /* TR adapter is now available */
1113 if (ti->open_mode == AUTOMATIC) {
1114 DPRINTK("Adapter reopened.\n");
1115 }
1116 writeb(~SRB_RESP_INT, ti->mmio+ACA_OFFSET+ACA_RESET+ISRP_ODD);
1117 open_sap(EXTENDED_SAP, dev);
1118 return;
1119 }
1120 ti->open_failure = YES;
1121 if (ret_code == 7){
1122 if (err == 0x24) {
1123 if (!ti->auto_speedsave) {
1124 DPRINTK("Open failed: Adapter speed must match "
1125 "ring speed if Automatic Ring Speed Save is "
1126 "disabled.\n");
1127 ti->open_action = FAIL;
1128 }else
1129 DPRINTK("Retrying open to adjust to "
1130 "ring speed, ");
1131 } else if (err == 0x2d) {
1132 DPRINTK("Physical Insertion: No Monitor Detected, ");
1133 printk("retrying after %ds delay...\n",
1134 TR_RETRY_INTERVAL/HZ);
1135 } else if (err == 0x11) {
1136 DPRINTK("Lobe Media Function Failure (0x11), ");
1137 printk(" retrying after %ds delay...\n",
1138 TR_RETRY_INTERVAL/HZ);
1139 } else {
1140 char **prphase = printphase;
1141 char **prerror = printerror;
1142 DPRINTK("TR Adapter misc open failure, error code = ");
1143 printk("0x%x, Phase: %s, Error: %s\n",
1144 err, prphase[err/16 -1], prerror[err%16 -1]);
1145 printk(" retrying after %ds delay...\n",
1146 TR_RETRY_INTERVAL/HZ);
1147 }
1148 } else DPRINTK("open failed: ret_code = %02X..., ", ret_code);
1149 if (ti->open_action != FAIL) {
1150 if (ti->open_mode==AUTOMATIC){
1151 ti->open_action = REOPEN;
1152 ibmtr_reset_timer(&(ti->tr_timer), dev);
1153 return;
1154 }
1155 wake_up(&ti->wait_for_reset);
1156 return;
1157 }
1158 DPRINTK("FAILURE, CAPUT\n");
1159 }
1160
1161 /******************************************************************************/
1162
tok_interrupt(int irq,void * dev_id)1163 static irqreturn_t tok_interrupt(int irq, void *dev_id)
1164 {
1165 unsigned char status;
1166 /* unsigned char status_even ; */
1167 struct tok_info *ti;
1168 struct net_device *dev;
1169 #ifdef ENABLE_PAGING
1170 unsigned char save_srpr;
1171 #endif
1172
1173 dev = dev_id;
1174 #if TR_VERBOSE
1175 DPRINTK("Int from tok_driver, dev : %p irq%d\n", dev,irq);
1176 #endif
1177 ti = netdev_priv(dev);
1178 if (ti->sram_phys & 1)
1179 return IRQ_NONE; /* PCMCIA card extraction flag */
1180 spin_lock(&(ti->lock));
1181 #ifdef ENABLE_PAGING
1182 save_srpr = readb(ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1183 #endif
1184
1185 /* Disable interrupts till processing is finished */
1186 writeb((~INT_ENABLE), ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1187
1188 /* Reset interrupt for ISA boards */
1189 if (ti->adapter_int_enable)
1190 outb(0, ti->adapter_int_enable);
1191 else /* used for PCMCIA cards */
1192 outb(0, ti->global_int_enable);
1193 if (ti->do_tok_int == FIRST_INT){
1194 initial_tok_int(dev);
1195 #ifdef ENABLE_PAGING
1196 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1197 #endif
1198 spin_unlock(&(ti->lock));
1199 return IRQ_HANDLED;
1200 }
1201 /* Begin interrupt handler HERE inline to avoid the extra
1202 levels of logic and call depth for the original solution. */
1203 status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_ODD);
1204 /*BMSstatus_even = readb (ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN) */
1205 /*BMSdebugprintk("tok_interrupt: ISRP_ODD = 0x%x ISRP_EVEN = 0x%x\n", */
1206 /*BMS status,status_even); */
1207
1208 if (status & ADAP_CHK_INT) {
1209 int i;
1210 void __iomem *check_reason;
1211 __u8 check_reason_page = 0;
1212 check_reason = map_address(ti,
1213 ntohs(readw(ti->mmio+ ACA_OFFSET+ACA_RW + WWCR_EVEN)),
1214 &check_reason_page);
1215 SET_PAGE(check_reason_page);
1216
1217 DPRINTK("Adapter check interrupt\n");
1218 DPRINTK("8 reason bytes follow: ");
1219 for (i = 0; i < 8; i++, check_reason++)
1220 printk("%02X ", (int) readb(check_reason));
1221 printk("\n");
1222 writeb(~ADAP_CHK_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1223 status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRA_EVEN);
1224 DPRINTK("ISRA_EVEN == 0x02%x\n",status);
1225 ti->open_status = CLOSED;
1226 ti->sap_status = CLOSED;
1227 ti->open_mode = AUTOMATIC;
1228 netif_carrier_off(dev);
1229 netif_stop_queue(dev);
1230 ti->open_action = RESTART;
1231 outb(0, dev->base_addr + ADAPTRESET);
1232 ibmtr_reset_timer(&(ti->tr_timer), dev);/*BMS try to reopen*/
1233 spin_unlock(&(ti->lock));
1234 return IRQ_HANDLED;
1235 }
1236 if (readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN)
1237 & (TCR_INT | ERR_INT | ACCESS_INT)) {
1238 DPRINTK("adapter error: ISRP_EVEN : %02x\n",
1239 (int)readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRP_EVEN));
1240 writeb(~(TCR_INT | ERR_INT | ACCESS_INT),
1241 ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1242 status= readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRA_EVEN);/*BMS*/
1243 DPRINTK("ISRA_EVEN == 0x02%x\n",status);/*BMS*/
1244 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1245 #ifdef ENABLE_PAGING
1246 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1247 #endif
1248 spin_unlock(&(ti->lock));
1249 return IRQ_HANDLED;
1250 }
1251 if (status & SRB_RESP_INT) { /* SRB response */
1252 SET_PAGE(ti->srb_page);
1253 #if TR_VERBOSE
1254 DPRINTK("SRB resp: cmd=%02X rsp=%02X\n",
1255 readb(ti->srb), readb(ti->srb + RETCODE_OFST));
1256 #endif
1257 switch (readb(ti->srb)) { /* SRB command check */
1258 case XMIT_DIR_FRAME:{
1259 unsigned char xmit_ret_code;
1260 xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1261 if (xmit_ret_code == 0xff) break;
1262 DPRINTK("error on xmit_dir_frame request: %02X\n",
1263 xmit_ret_code);
1264 if (ti->current_skb) {
1265 dev_kfree_skb_irq(ti->current_skb);
1266 ti->current_skb = NULL;
1267 }
1268 /*dev->tbusy = 0;*/
1269 netif_wake_queue(dev);
1270 if (ti->readlog_pending)
1271 ibmtr_readlog(dev);
1272 break;
1273 }
1274 case XMIT_UI_FRAME:{
1275 unsigned char xmit_ret_code;
1276
1277 xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1278 if (xmit_ret_code == 0xff) break;
1279 DPRINTK("error on xmit_ui_frame request: %02X\n",
1280 xmit_ret_code);
1281 if (ti->current_skb) {
1282 dev_kfree_skb_irq(ti->current_skb);
1283 ti->current_skb = NULL;
1284 }
1285 netif_wake_queue(dev);
1286 if (ti->readlog_pending)
1287 ibmtr_readlog(dev);
1288 break;
1289 }
1290 case DIR_OPEN_ADAPTER:
1291 dir_open_adapter(dev);
1292 break;
1293 case DLC_OPEN_SAP:
1294 if (readb(ti->srb + RETCODE_OFST)) {
1295 DPRINTK("open_sap failed: ret_code = %02X, "
1296 "retrying\n",
1297 (int) readb(ti->srb + RETCODE_OFST));
1298 ti->open_action = REOPEN;
1299 ibmtr_reset_timer(&(ti->tr_timer), dev);
1300 break;
1301 }
1302 ti->exsap_station_id = readw(ti->srb + STATION_ID_OFST);
1303 ti->sap_status = OPEN;/* TR adapter is now available */
1304 if (ti->open_mode==MANUAL){
1305 wake_up(&ti->wait_for_reset);
1306 break;
1307 }
1308 netif_wake_queue(dev);
1309 netif_carrier_on(dev);
1310 break;
1311 case DIR_INTERRUPT:
1312 case DIR_MOD_OPEN_PARAMS:
1313 case DIR_SET_GRP_ADDR:
1314 case DIR_SET_FUNC_ADDR:
1315 case DLC_CLOSE_SAP:
1316 if (readb(ti->srb + RETCODE_OFST))
1317 DPRINTK("error on %02X: %02X\n",
1318 (int) readb(ti->srb + COMMAND_OFST),
1319 (int) readb(ti->srb + RETCODE_OFST));
1320 break;
1321 case DIR_READ_LOG:
1322 if (readb(ti->srb + RETCODE_OFST)){
1323 DPRINTK("error on dir_read_log: %02X\n",
1324 (int) readb(ti->srb + RETCODE_OFST));
1325 netif_wake_queue(dev);
1326 break;
1327 }
1328 #if IBMTR_DEBUG_MESSAGES
1329
1330 #define LINE_ERRORS_OFST 0
1331 #define INTERNAL_ERRORS_OFST 1
1332 #define BURST_ERRORS_OFST 2
1333 #define AC_ERRORS_OFST 3
1334 #define ABORT_DELIMITERS_OFST 4
1335 #define LOST_FRAMES_OFST 6
1336 #define RECV_CONGEST_COUNT_OFST 7
1337 #define FRAME_COPIED_ERRORS_OFST 8
1338 #define FREQUENCY_ERRORS_OFST 9
1339 #define TOKEN_ERRORS_OFST 10
1340
1341 DPRINTK("Line errors %02X, Internal errors %02X, "
1342 "Burst errors %02X\n" "A/C errors %02X, "
1343 "Abort delimiters %02X, Lost frames %02X\n"
1344 "Receive congestion count %02X, "
1345 "Frame copied errors %02X\nFrequency errors %02X, "
1346 "Token errors %02X\n",
1347 (int) readb(ti->srb + LINE_ERRORS_OFST),
1348 (int) readb(ti->srb + INTERNAL_ERRORS_OFST),
1349 (int) readb(ti->srb + BURST_ERRORS_OFST),
1350 (int) readb(ti->srb + AC_ERRORS_OFST),
1351 (int) readb(ti->srb + ABORT_DELIMITERS_OFST),
1352 (int) readb(ti->srb + LOST_FRAMES_OFST),
1353 (int) readb(ti->srb + RECV_CONGEST_COUNT_OFST),
1354 (int) readb(ti->srb + FRAME_COPIED_ERRORS_OFST),
1355 (int) readb(ti->srb + FREQUENCY_ERRORS_OFST),
1356 (int) readb(ti->srb + TOKEN_ERRORS_OFST));
1357 #endif
1358 netif_wake_queue(dev);
1359 break;
1360 default:
1361 DPRINTK("Unknown command %02X encountered\n",
1362 (int) readb(ti->srb));
1363 } /* end switch SRB command check */
1364 writeb(~SRB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1365 } /* if SRB response */
1366 if (status & ASB_FREE_INT) { /* ASB response */
1367 SET_PAGE(ti->asb_page);
1368 #if TR_VERBOSE
1369 DPRINTK("ASB resp: cmd=%02X\n", readb(ti->asb));
1370 #endif
1371
1372 switch (readb(ti->asb)) { /* ASB command check */
1373 case REC_DATA:
1374 case XMIT_UI_FRAME:
1375 case XMIT_DIR_FRAME:
1376 break;
1377 default:
1378 DPRINTK("unknown command in asb %02X\n",
1379 (int) readb(ti->asb));
1380 } /* switch ASB command check */
1381 if (readb(ti->asb + 2) != 0xff) /* checks ret_code */
1382 DPRINTK("ASB error %02X in cmd %02X\n",
1383 (int) readb(ti->asb + 2), (int) readb(ti->asb));
1384 writeb(~ASB_FREE_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1385 } /* if ASB response */
1386
1387 #define STATUS_OFST 6
1388 #define NETW_STATUS_OFST 6
1389
1390 if (status & ARB_CMD_INT) { /* ARB response */
1391 SET_PAGE(ti->arb_page);
1392 #if TR_VERBOSE
1393 DPRINTK("ARB resp: cmd=%02X\n", readb(ti->arb));
1394 #endif
1395
1396 switch (readb(ti->arb)) { /* ARB command check */
1397 case DLC_STATUS:
1398 DPRINTK("DLC_STATUS new status: %02X on station %02X\n",
1399 ntohs(readw(ti->arb + STATUS_OFST)),
1400 ntohs(readw(ti->arb+ STATION_ID_OFST)));
1401 break;
1402 case REC_DATA:
1403 tr_rx(dev);
1404 break;
1405 case RING_STAT_CHANGE:{
1406 unsigned short ring_status;
1407 ring_status= ntohs(readw(ti->arb + NETW_STATUS_OFST));
1408 if (ibmtr_debug_trace & TRC_INIT)
1409 DPRINTK("Ring Status Change...(0x%x)\n",
1410 ring_status);
1411 if(ring_status& (REMOVE_RECV|AUTO_REMOVAL|LOBE_FAULT)){
1412 netif_stop_queue(dev);
1413 netif_carrier_off(dev);
1414 DPRINTK("Remove received, or Auto-removal error"
1415 ", or Lobe fault\n");
1416 DPRINTK("We'll try to reopen the closed adapter"
1417 " after a %d second delay.\n",
1418 TR_RETRY_INTERVAL/HZ);
1419 /*I was confused: I saw the TR reopening but */
1420 /*forgot:with an RJ45 in an RJ45/ICS adapter */
1421 /*but adapter not in the ring, the TR will */
1422 /* open, and then soon close and come here. */
1423 ti->open_mode = AUTOMATIC;
1424 ti->open_status = CLOSED; /*12/2000 BMS*/
1425 ti->open_action = REOPEN;
1426 ibmtr_reset_timer(&(ti->tr_timer), dev);
1427 } else if (ring_status & LOG_OVERFLOW) {
1428 if(netif_queue_stopped(dev))
1429 ti->readlog_pending = 1;
1430 else
1431 ibmtr_readlog(dev);
1432 }
1433 break;
1434 }
1435 case XMIT_DATA_REQ:
1436 tr_tx(dev);
1437 break;
1438 default:
1439 DPRINTK("Unknown command %02X in arb\n",
1440 (int) readb(ti->arb));
1441 break;
1442 } /* switch ARB command check */
1443 writeb(~ARB_CMD_INT, ti->mmio+ ACA_OFFSET+ACA_RESET + ISRP_ODD);
1444 writeb(ARB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1445 } /* if ARB response */
1446 if (status & SSB_RESP_INT) { /* SSB response */
1447 unsigned char retcode;
1448 SET_PAGE(ti->ssb_page);
1449 #if TR_VERBOSE
1450 DPRINTK("SSB resp: cmd=%02X rsp=%02X\n",
1451 readb(ti->ssb), readb(ti->ssb + 2));
1452 #endif
1453
1454 switch (readb(ti->ssb)) { /* SSB command check */
1455 case XMIT_DIR_FRAME:
1456 case XMIT_UI_FRAME:
1457 retcode = readb(ti->ssb + 2);
1458 if (retcode && (retcode != 0x22))/* checks ret_code */
1459 DPRINTK("xmit ret_code: %02X xmit error code: "
1460 "%02X\n",
1461 (int)retcode, (int)readb(ti->ssb + 6));
1462 else
1463 ti->tr_stats.tx_packets++;
1464 break;
1465 case XMIT_XID_CMD:
1466 DPRINTK("xmit xid ret_code: %02X\n",
1467 (int) readb(ti->ssb + 2));
1468 default:
1469 DPRINTK("Unknown command %02X in ssb\n",
1470 (int) readb(ti->ssb));
1471 } /* SSB command check */
1472 writeb(~SSB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1473 writeb(SSB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1474 } /* if SSB response */
1475 #ifdef ENABLE_PAGING
1476 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1477 #endif
1478 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1479 spin_unlock(&(ti->lock));
1480 return IRQ_HANDLED;
1481 } /*tok_interrupt */
1482
1483 /*****************************************************************************/
1484
1485 #define INIT_STATUS_OFST 1
1486 #define INIT_STATUS_2_OFST 2
1487 #define ENCODED_ADDRESS_OFST 8
1488
initial_tok_int(struct net_device * dev)1489 static void initial_tok_int(struct net_device *dev)
1490 {
1491
1492 __u32 encoded_addr, hw_encoded_addr;
1493 struct tok_info *ti;
1494 unsigned char init_status; /*BMS 12/2000*/
1495
1496 ti = netdev_priv(dev);
1497
1498 ti->do_tok_int = NOT_FIRST;
1499
1500 /* we assign the shared-ram address for ISA devices */
1501 writeb(ti->sram_base, ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN);
1502 #ifndef PCMCIA
1503 ti->sram_virt = ioremap(((__u32)ti->sram_base << 12), ti->avail_shared_ram);
1504 #endif
1505 ti->init_srb = map_address(ti,
1506 ntohs(readw(ti->mmio + ACA_OFFSET + WRBR_EVEN)),
1507 &ti->init_srb_page);
1508 if (ti->page_mask && ti->avail_shared_ram == 127) {
1509 void __iomem *last_512;
1510 __u8 last_512_page=0;
1511 int i;
1512 last_512 = map_address(ti, 0xfe00, &last_512_page);
1513 /* initialize high section of ram (if necessary) */
1514 SET_PAGE(last_512_page);
1515 for (i = 0; i < 512; i++)
1516 writeb(0, last_512 + i);
1517 }
1518 SET_PAGE(ti->init_srb_page);
1519
1520 #if TR_VERBOSE
1521 {
1522 int i;
1523
1524 DPRINTK("ti->init_srb_page=0x%x\n", ti->init_srb_page);
1525 DPRINTK("init_srb(%p):", ti->init_srb );
1526 for (i = 0; i < 20; i++)
1527 printk("%02X ", (int) readb(ti->init_srb + i));
1528 printk("\n");
1529 }
1530 #endif
1531
1532 hw_encoded_addr = readw(ti->init_srb + ENCODED_ADDRESS_OFST);
1533 encoded_addr = ntohs(hw_encoded_addr);
1534 init_status= /*BMS 12/2000 check for shallow mode possibility (Turbo)*/
1535 readb(ti->init_srb+offsetof(struct srb_init_response,init_status));
1536 /*printk("Initial interrupt: init_status= 0x%02x\n",init_status);*/
1537 ti->ring_speed = init_status & 0x01 ? 16 : 4;
1538 DPRINTK("Initial interrupt : %d Mbps, shared RAM base %08x.\n",
1539 ti->ring_speed, (unsigned int)dev->mem_start);
1540 ti->auto_speedsave = (readb(ti->init_srb+INIT_STATUS_2_OFST) & 4) != 0;
1541
1542 if (ti->open_mode == MANUAL) wake_up(&ti->wait_for_reset);
1543 else tok_open_adapter((unsigned long)dev);
1544
1545 } /*initial_tok_int() */
1546
1547 /*****************************************************************************/
1548
1549 #define CMD_CORRELATE_OFST 1
1550 #define DHB_ADDRESS_OFST 6
1551
1552 #define FRAME_LENGTH_OFST 6
1553 #define HEADER_LENGTH_OFST 8
1554 #define RSAP_VALUE_OFST 9
1555
tr_tx(struct net_device * dev)1556 static void tr_tx(struct net_device *dev)
1557 {
1558 struct tok_info *ti = netdev_priv(dev);
1559 struct trh_hdr *trhdr = (struct trh_hdr *) ti->current_skb->data;
1560 unsigned int hdr_len;
1561 __u32 dhb=0,dhb_base;
1562 void __iomem *dhbuf = NULL;
1563 unsigned char xmit_command;
1564 int i,dhb_len=0x4000,src_len,src_offset;
1565 struct trllc *llc;
1566 struct srb_xmit xsrb;
1567 __u8 dhb_page = 0;
1568 __u8 llc_ssap;
1569
1570 SET_PAGE(ti->asb_page);
1571
1572 if (readb(ti->asb+RETCODE_OFST) != 0xFF) DPRINTK("ASB not free !!!\n");
1573
1574 /* in providing the transmit interrupts, is telling us it is ready for
1575 data and providing a shared memory address for us to stuff with data.
1576 Here we compute the effective address where we will place data.
1577 */
1578 SET_PAGE(ti->arb_page);
1579 dhb=dhb_base=ntohs(readw(ti->arb + DHB_ADDRESS_OFST));
1580 if (ti->page_mask) {
1581 dhb_page = (dhb_base >> 8) & ti->page_mask;
1582 dhb=dhb_base & ~(ti->page_mask << 8);
1583 }
1584 dhbuf = ti->sram_virt + dhb;
1585
1586 /* Figure out the size of the 802.5 header */
1587 if (!(trhdr->saddr[0] & 0x80)) /* RIF present? */
1588 hdr_len = sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1589 else
1590 hdr_len = ((ntohs(trhdr->rcf) & TR_RCF_LEN_MASK) >> 8)
1591 + sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1592
1593 llc = (struct trllc *) (ti->current_skb->data + hdr_len);
1594
1595 llc_ssap = llc->ssap;
1596 SET_PAGE(ti->srb_page);
1597 memcpy_fromio(&xsrb, ti->srb, sizeof(xsrb));
1598 SET_PAGE(ti->asb_page);
1599 xmit_command = xsrb.command;
1600
1601 writeb(xmit_command, ti->asb + COMMAND_OFST);
1602 writew(xsrb.station_id, ti->asb + STATION_ID_OFST);
1603 writeb(llc_ssap, ti->asb + RSAP_VALUE_OFST);
1604 writeb(xsrb.cmd_corr, ti->asb + CMD_CORRELATE_OFST);
1605 writeb(0, ti->asb + RETCODE_OFST);
1606 if ((xmit_command == XMIT_XID_CMD) || (xmit_command == XMIT_TEST_CMD)) {
1607 writew(htons(0x11), ti->asb + FRAME_LENGTH_OFST);
1608 writeb(0x0e, ti->asb + HEADER_LENGTH_OFST);
1609 SET_PAGE(dhb_page);
1610 writeb(AC, dhbuf);
1611 writeb(LLC_FRAME, dhbuf + 1);
1612 for (i = 0; i < TR_ALEN; i++)
1613 writeb((int) 0x0FF, dhbuf + i + 2);
1614 for (i = 0; i < TR_ALEN; i++)
1615 writeb(0, dhbuf + i + TR_ALEN + 2);
1616 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1617 return;
1618 }
1619 /*
1620 * the token ring packet is copied from sk_buff to the adapter
1621 * buffer identified in the command data received with the interrupt.
1622 */
1623 writeb(hdr_len, ti->asb + HEADER_LENGTH_OFST);
1624 writew(htons(ti->current_skb->len), ti->asb + FRAME_LENGTH_OFST);
1625 src_len=ti->current_skb->len;
1626 src_offset=0;
1627 dhb=dhb_base;
1628 while(1) {
1629 if (ti->page_mask) {
1630 dhb_page=(dhb >> 8) & ti->page_mask;
1631 dhb=dhb & ~(ti->page_mask << 8);
1632 dhb_len=0x4000-dhb; /* remaining size of this page */
1633 }
1634 dhbuf = ti->sram_virt + dhb;
1635 SET_PAGE(dhb_page);
1636 if (src_len > dhb_len) {
1637 memcpy_toio(dhbuf,&ti->current_skb->data[src_offset],
1638 dhb_len);
1639 src_len -= dhb_len;
1640 src_offset += dhb_len;
1641 dhb_base+=dhb_len;
1642 dhb=dhb_base;
1643 continue;
1644 }
1645 memcpy_toio(dhbuf, &ti->current_skb->data[src_offset], src_len);
1646 break;
1647 }
1648 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1649 ti->tr_stats.tx_bytes += ti->current_skb->len;
1650 dev_kfree_skb_irq(ti->current_skb);
1651 ti->current_skb = NULL;
1652 netif_wake_queue(dev);
1653 if (ti->readlog_pending)
1654 ibmtr_readlog(dev);
1655 } /*tr_tx */
1656
1657 /*****************************************************************************/
1658
1659
1660 #define RECEIVE_BUFFER_OFST 6
1661 #define LAN_HDR_LENGTH_OFST 8
1662 #define DLC_HDR_LENGTH_OFST 9
1663
1664 #define DSAP_OFST 0
1665 #define SSAP_OFST 1
1666 #define LLC_OFST 2
1667 #define PROTID_OFST 3
1668 #define ETHERTYPE_OFST 6
1669
tr_rx(struct net_device * dev)1670 static void tr_rx(struct net_device *dev)
1671 {
1672 struct tok_info *ti = netdev_priv(dev);
1673 __u32 rbuffer;
1674 void __iomem *rbuf, *rbufdata, *llc;
1675 __u8 rbuffer_page = 0;
1676 unsigned char *data;
1677 unsigned int rbuffer_len, lan_hdr_len, hdr_len, ip_len, length;
1678 unsigned char dlc_hdr_len;
1679 struct sk_buff *skb;
1680 unsigned int skb_size = 0;
1681 int IPv4_p = 0;
1682 unsigned int chksum = 0;
1683 struct iphdr *iph;
1684 struct arb_rec_req rarb;
1685
1686 SET_PAGE(ti->arb_page);
1687 memcpy_fromio(&rarb, ti->arb, sizeof(rarb));
1688 rbuffer = ntohs(rarb.rec_buf_addr) ;
1689 rbuf = map_address(ti, rbuffer, &rbuffer_page);
1690
1691 SET_PAGE(ti->asb_page);
1692
1693 if (readb(ti->asb + RETCODE_OFST) !=0xFF) DPRINTK("ASB not free !!!\n");
1694
1695 writeb(REC_DATA, ti->asb + COMMAND_OFST);
1696 writew(rarb.station_id, ti->asb + STATION_ID_OFST);
1697 writew(rarb.rec_buf_addr, ti->asb + RECEIVE_BUFFER_OFST);
1698
1699 lan_hdr_len = rarb.lan_hdr_len;
1700 if (lan_hdr_len > sizeof(struct trh_hdr)) {
1701 DPRINTK("Linux cannot handle greater than 18 bytes RIF\n");
1702 return;
1703 } /*BMS I added this above just to be very safe */
1704 dlc_hdr_len = readb(ti->arb + DLC_HDR_LENGTH_OFST);
1705 hdr_len = lan_hdr_len + sizeof(struct trllc) + sizeof(struct iphdr);
1706
1707 SET_PAGE(rbuffer_page);
1708 llc = rbuf + offsetof(struct rec_buf, data) + lan_hdr_len;
1709
1710 #if TR_VERBOSE
1711 DPRINTK("offsetof data: %02X lan_hdr_len: %02X\n",
1712 (__u32) offsetof(struct rec_buf, data), (unsigned int) lan_hdr_len);
1713 DPRINTK("llc: %08X rec_buf_addr: %04X dev->mem_start: %lX\n",
1714 llc, ntohs(rarb.rec_buf_addr), dev->mem_start);
1715 DPRINTK("dsap: %02X, ssap: %02X, llc: %02X, protid: %02X%02X%02X, "
1716 "ethertype: %04X\n",
1717 (int) readb(llc + DSAP_OFST), (int) readb(llc + SSAP_OFST),
1718 (int) readb(llc + LLC_OFST), (int) readb(llc + PROTID_OFST),
1719 (int) readb(llc+PROTID_OFST+1),(int)readb(llc+PROTID_OFST + 2),
1720 (int) ntohs(readw(llc + ETHERTYPE_OFST)));
1721 #endif
1722 if (readb(llc + offsetof(struct trllc, llc)) != UI_CMD) {
1723 SET_PAGE(ti->asb_page);
1724 writeb(DATA_LOST, ti->asb + RETCODE_OFST);
1725 ti->tr_stats.rx_dropped++;
1726 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1727 return;
1728 }
1729 length = ntohs(rarb.frame_len);
1730 if (readb(llc + DSAP_OFST) == EXTENDED_SAP &&
1731 readb(llc + SSAP_OFST) == EXTENDED_SAP &&
1732 length >= hdr_len) IPv4_p = 1;
1733 #if TR_VERBOSE
1734 #define SADDR_OFST 8
1735 #define DADDR_OFST 2
1736
1737 if (!IPv4_p) {
1738
1739 void __iomem *trhhdr = rbuf + offsetof(struct rec_buf, data);
1740 u8 saddr[6];
1741 u8 daddr[6];
1742 int i;
1743 for (i = 0 ; i < 6 ; i++)
1744 saddr[i] = readb(trhhdr + SADDR_OFST + i);
1745 for (i = 0 ; i < 6 ; i++)
1746 daddr[i] = readb(trhhdr + DADDR_OFST + i);
1747 DPRINTK("Probably non-IP frame received.\n");
1748 DPRINTK("ssap: %02X dsap: %02X "
1749 "saddr: %pM daddr: %pM\n",
1750 readb(llc + SSAP_OFST), readb(llc + DSAP_OFST),
1751 saddr, daddr);
1752 }
1753 #endif
1754
1755 /*BMS handle the case she comes in with few hops but leaves with many */
1756 skb_size=length-lan_hdr_len+sizeof(struct trh_hdr)+sizeof(struct trllc);
1757
1758 if (!(skb = dev_alloc_skb(skb_size))) {
1759 DPRINTK("out of memory. frame dropped.\n");
1760 ti->tr_stats.rx_dropped++;
1761 SET_PAGE(ti->asb_page);
1762 writeb(DATA_LOST, ti->asb + offsetof(struct asb_rec, ret_code));
1763 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1764 return;
1765 }
1766 /*BMS again, if she comes in with few but leaves with many */
1767 skb_reserve(skb, sizeof(struct trh_hdr) - lan_hdr_len);
1768 skb_put(skb, length);
1769 data = skb->data;
1770 rbuffer_len = ntohs(readw(rbuf + offsetof(struct rec_buf, buf_len)));
1771 rbufdata = rbuf + offsetof(struct rec_buf, data);
1772
1773 if (IPv4_p) {
1774 /* Copy the headers without checksumming */
1775 memcpy_fromio(data, rbufdata, hdr_len);
1776
1777 /* Watch for padded packets and bogons */
1778 iph= (struct iphdr *)(data+ lan_hdr_len + sizeof(struct trllc));
1779 ip_len = ntohs(iph->tot_len) - sizeof(struct iphdr);
1780 length -= hdr_len;
1781 if ((ip_len <= length) && (ip_len > 7))
1782 length = ip_len;
1783 data += hdr_len;
1784 rbuffer_len -= hdr_len;
1785 rbufdata += hdr_len;
1786 }
1787 /* Copy the payload... */
1788 #define BUFFER_POINTER_OFST 2
1789 #define BUFFER_LENGTH_OFST 6
1790 for (;;) {
1791 if (ibmtr_debug_trace&TRC_INITV && length < rbuffer_len)
1792 DPRINTK("CURIOUS, length=%d < rbuffer_len=%d\n",
1793 length,rbuffer_len);
1794 if (IPv4_p)
1795 chksum=csum_partial_copy_nocheck((void*)rbufdata,
1796 data,length<rbuffer_len?length:rbuffer_len,chksum);
1797 else
1798 memcpy_fromio(data, rbufdata, rbuffer_len);
1799 rbuffer = ntohs(readw(rbuf+BUFFER_POINTER_OFST)) ;
1800 if (!rbuffer)
1801 break;
1802 rbuffer -= 2;
1803 length -= rbuffer_len;
1804 data += rbuffer_len;
1805 rbuf = map_address(ti, rbuffer, &rbuffer_page);
1806 SET_PAGE(rbuffer_page);
1807 rbuffer_len = ntohs(readw(rbuf + BUFFER_LENGTH_OFST));
1808 rbufdata = rbuf + offsetof(struct rec_buf, data);
1809 }
1810
1811 SET_PAGE(ti->asb_page);
1812 writeb(0, ti->asb + offsetof(struct asb_rec, ret_code));
1813
1814 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1815
1816 ti->tr_stats.rx_bytes += skb->len;
1817 ti->tr_stats.rx_packets++;
1818
1819 skb->protocol = tr_type_trans(skb, dev);
1820 if (IPv4_p) {
1821 skb->csum = chksum;
1822 skb->ip_summed = CHECKSUM_COMPLETE;
1823 }
1824 netif_rx(skb);
1825 } /*tr_rx */
1826
1827 /*****************************************************************************/
1828
ibmtr_reset_timer(struct timer_list * tmr,struct net_device * dev)1829 static void ibmtr_reset_timer(struct timer_list *tmr, struct net_device *dev)
1830 {
1831 tmr->expires = jiffies + TR_RETRY_INTERVAL;
1832 tmr->data = (unsigned long) dev;
1833 tmr->function = tok_rerun;
1834 init_timer(tmr);
1835 add_timer(tmr);
1836 }
1837
1838 /*****************************************************************************/
1839
tok_rerun(unsigned long dev_addr)1840 static void tok_rerun(unsigned long dev_addr)
1841 {
1842 struct net_device *dev = (struct net_device *)dev_addr;
1843 struct tok_info *ti = netdev_priv(dev);
1844
1845 if ( ti->open_action == RESTART){
1846 ti->do_tok_int = FIRST_INT;
1847 outb(0, dev->base_addr + ADAPTRESETREL);
1848 #ifdef ENABLE_PAGING
1849 if (ti->page_mask)
1850 writeb(SRPR_ENABLE_PAGING,
1851 ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1852 #endif
1853
1854 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1855 } else
1856 tok_open_adapter(dev_addr);
1857 }
1858
1859 /*****************************************************************************/
1860
ibmtr_readlog(struct net_device * dev)1861 static void ibmtr_readlog(struct net_device *dev)
1862 {
1863 struct tok_info *ti;
1864
1865 ti = netdev_priv(dev);
1866
1867 ti->readlog_pending = 0;
1868 SET_PAGE(ti->srb_page);
1869 writeb(DIR_READ_LOG, ti->srb);
1870 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1871 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1872
1873 netif_stop_queue(dev);
1874
1875 }
1876
1877 /*****************************************************************************/
1878
1879 /* tok_get_stats(): Basically a scaffold routine which will return
1880 the address of the tr_statistics structure associated with
1881 this device -- the tr.... structure is an ethnet look-alike
1882 so at least for this iteration may suffice. */
1883
tok_get_stats(struct net_device * dev)1884 static struct net_device_stats *tok_get_stats(struct net_device *dev)
1885 {
1886
1887 struct tok_info *toki;
1888 toki = netdev_priv(dev);
1889 return (struct net_device_stats *) &toki->tr_stats;
1890 }
1891
1892 /*****************************************************************************/
1893
ibmtr_change_mtu(struct net_device * dev,int mtu)1894 static int ibmtr_change_mtu(struct net_device *dev, int mtu)
1895 {
1896 struct tok_info *ti = netdev_priv(dev);
1897
1898 if (ti->ring_speed == 16 && mtu > ti->maxmtu16)
1899 return -EINVAL;
1900 if (ti->ring_speed == 4 && mtu > ti->maxmtu4)
1901 return -EINVAL;
1902 dev->mtu = mtu;
1903 return 0;
1904 }
1905
1906 /*****************************************************************************/
1907 #ifdef MODULE
1908
1909 /* 3COM 3C619C supports 8 interrupts, 32 I/O ports */
1910 static struct net_device *dev_ibmtr[IBMTR_MAX_ADAPTERS];
1911 static int io[IBMTR_MAX_ADAPTERS] = { 0xa20, 0xa24 };
1912 static int irq[IBMTR_MAX_ADAPTERS];
1913 static int mem[IBMTR_MAX_ADAPTERS];
1914
1915 MODULE_LICENSE("GPL");
1916
1917 module_param_array(io, int, NULL, 0);
1918 module_param_array(irq, int, NULL, 0);
1919 module_param_array(mem, int, NULL, 0);
1920
ibmtr_init(void)1921 static int __init ibmtr_init(void)
1922 {
1923 int i;
1924 int count=0;
1925
1926 find_turbo_adapters(io);
1927
1928 for (i = 0; io[i] && (i < IBMTR_MAX_ADAPTERS); i++) {
1929 struct net_device *dev;
1930 irq[i] = 0;
1931 mem[i] = 0;
1932 dev = alloc_trdev(sizeof(struct tok_info));
1933 if (dev == NULL) {
1934 if (i == 0)
1935 return -ENOMEM;
1936 break;
1937 }
1938 dev->base_addr = io[i];
1939 dev->irq = irq[i];
1940 dev->mem_start = mem[i];
1941
1942 if (ibmtr_probe_card(dev)) {
1943 free_netdev(dev);
1944 continue;
1945 }
1946 dev_ibmtr[i] = dev;
1947 count++;
1948 }
1949 if (count) return 0;
1950 printk("ibmtr: register_netdev() returned non-zero.\n");
1951 return -EIO;
1952 }
1953 module_init(ibmtr_init);
1954
ibmtr_cleanup(void)1955 static void __exit ibmtr_cleanup(void)
1956 {
1957 int i;
1958
1959 for (i = 0; i < IBMTR_MAX_ADAPTERS; i++){
1960 if (!dev_ibmtr[i])
1961 continue;
1962 unregister_netdev(dev_ibmtr[i]);
1963 ibmtr_cleanup_card(dev_ibmtr[i]);
1964 free_netdev(dev_ibmtr[i]);
1965 }
1966 }
1967 module_exit(ibmtr_cleanup);
1968 #endif
1969