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1da177e4
LT		 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
106in 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#define FALSE 0
120#define TRUE (!FALSE)
121
122/* changes the output format of driver initialization */
123#define TR_VERBOSE 0
124
125/* some 95 OS send many non UI frame; this allow removing the warning */
126#define TR_FILTERNONUI 1
127
128#include <linux/ioport.h>
129#include <linux/netdevice.h>
130#include <linux/ip.h>
131#include <linux/trdevice.h>
132#include <linux/ibmtr.h>
133
134#include <net/checksum.h>
135
136#include <asm/io.h>
137
138#define DPRINTK(format, args...) printk("%s: " format, dev->name , ## args)
139#define DPRINTD(format, args...) DummyCall("%s: " format, dev->name , ## args)
140
141/* version and credits */
142#ifndef PCMCIA
143static char version[] __initdata =
144 "\nibmtr.c: v1.3.57 8/ 7/94 Peter De Schrijver and Mark Swanson\n"
145 " v2.1.125 10/20/98 Paul Norton <pnorton@ieee.org>\n"
146 " v2.2.0 12/30/98 Joel Sloan <jjs@c-me.com>\n"
147 " v2.2.1 02/08/00 Mike Sullivan <sullivam@us.ibm.com>\n"
148 " v2.2.2 07/27/00 Burt Silverman <burts@us.ibm.com>\n"
149 " v2.4.0 03/01/01 Mike Sullivan <sullivan@us.ibm.com>\n";
150#endif
151
152/* this allows displaying full adapter information */
153
de70b4c8 154static char *channel_def[] __devinitdata = { "ISA", "MCA", "ISA P&P" };
1da177e4
LT		 155
156static char pcchannelid[] __devinitdata = {
157 0x05, 0x00, 0x04, 0x09,
158 0x04, 0x03, 0x04, 0x0f,
159 0x03, 0x06, 0x03, 0x01,
160 0x03, 0x01, 0x03, 0x00,
161 0x03, 0x09, 0x03, 0x09,
162 0x03, 0x00, 0x02, 0x00
163};
164
165static char mcchannelid[] __devinitdata = {
166 0x04, 0x0d, 0x04, 0x01,
167 0x05, 0x02, 0x05, 0x03,
168 0x03, 0x06, 0x03, 0x03,
169 0x05, 0x08, 0x03, 0x04,
170 0x03, 0x05, 0x03, 0x01,
171 0x03, 0x08, 0x02, 0x00
172};
173
de70b4c8 174static char __devinit *adapter_def(char type)
1da177e4
LT		 175{
176 switch (type) {
177 case 0xF: return "PC Adapter | PC Adapter II | Adapter/A";
178 case 0xE: return "16/4 Adapter | 16/4 Adapter/A (long)";
179 case 0xD: return "16/4 Adapter/A (short) | 16/4 ISA-16 Adapter";
180 case 0xC: return "Auto 16/4 Adapter";
181 default: return "adapter (unknown type)";
182 };
183};
184
185#define TRC_INIT 0x01 /* Trace initialization & PROBEs */
186#define TRC_INITV 0x02 /* verbose init trace points */
de70b4c8 187static unsigned char ibmtr_debug_trace = 0;
1da177e4
LT		 188
189static int ibmtr_probe(struct net_device *dev);
190static int ibmtr_probe1(struct net_device *dev, int ioaddr);
191static unsigned char get_sram_size(struct tok_info *adapt_info);
192static int trdev_init(struct net_device *dev);
193static int tok_open(struct net_device *dev);
194static int tok_init_card(struct net_device *dev);
de70b4c8 195static void tok_open_adapter(unsigned long dev_addr);
1da177e4
LT		 196static void open_sap(unsigned char type, struct net_device *dev);
197static void tok_set_multicast_list(struct net_device *dev);
198static int tok_send_packet(struct sk_buff *skb, struct net_device *dev);
199static int tok_close(struct net_device *dev);
de70b4c8 200static irqreturn_t tok_interrupt(int irq, void *dev_id, struct pt_regs *regs);
1da177e4
LT		 201static void initial_tok_int(struct net_device *dev);
202static void tr_tx(struct net_device *dev);
203static void tr_rx(struct net_device *dev);
de70b4c8 204static void ibmtr_reset_timer(struct timer_list*tmr,struct net_device *dev);
1da177e4 205static void tok_rerun(unsigned long dev_addr);
de70b4c8 206static void ibmtr_readlog(struct net_device *dev);
1da177e4 207static struct net_device_stats *tok_get_stats(struct net_device *dev);
de70b4c8 208static int ibmtr_change_mtu(struct net_device *dev, int mtu);
1da177e4
LT		 209static void find_turbo_adapters(int *iolist);
210
211static int ibmtr_portlist[IBMTR_MAX_ADAPTERS+1] __devinitdata = {
212 0xa20, 0xa24, 0, 0, 0
213};
214static int __devinitdata turbo_io[IBMTR_MAX_ADAPTERS] = {0};
215static int __devinitdata turbo_irq[IBMTR_MAX_ADAPTERS] = {0};
216static int __devinitdata turbo_searched = 0;
217
218#ifndef PCMCIA
219static __u32 ibmtr_mem_base __initdata = 0xd0000;
220#endif
221
222static void __devinit PrtChanID(char *pcid, short stride)
223{
224 short i, j;
225 for (i = 0, j = 0; i < 24; i++, j += stride)
226 printk("%1x", ((int) pcid[j]) & 0x0f);
227 printk("\n");
228}
229
230static void __devinit HWPrtChanID(void __iomem *pcid, short stride)
231{
232 short i, j;
233 for (i = 0, j = 0; i < 24; i++, j += stride)
234 printk("%1x", ((int) readb(pcid + j)) & 0x0f);
235 printk("\n");
236}
237
238/* We have to ioremap every checked address, because isa_readb is
239 * going away.
240 */
241
242static void __devinit find_turbo_adapters(int *iolist)
243{
244 int ram_addr;
245 int index=0;
246 void __iomem *chanid;
247 int found_turbo=0;
248 unsigned char *tchanid, ctemp;
249 int i, j;
250 unsigned long jif;
251 void __iomem *ram_mapped ;
252
253 if (turbo_searched == 1) return;
254 turbo_searched=1;
255 for (ram_addr=0xC0000; ram_addr < 0xE0000; ram_addr+=0x2000) {
256
257 __u32 intf_tbl=0;
258
259 found_turbo=1;
260 ram_mapped = ioremap((u32)ram_addr,0x1fff) ;
261 if (ram_mapped==NULL)
262 continue ;
263 chanid=(CHANNEL_ID + ram_mapped);
264 tchanid=pcchannelid;
265 ctemp=readb(chanid) & 0x0f;
266 if (ctemp != *tchanid) continue;
267 for (i=2,j=1; i<=46; i=i+2,j++) {
268 if ((readb(chanid+i) & 0x0f) != tchanid[j]){
269 found_turbo=0;
270 break;
271 }
272 }
273 if (!found_turbo) continue;
274
275 writeb(0x90, ram_mapped+0x1E01);
276 for(i=2; i<0x0f; i++) {
277 writeb(0x00, ram_mapped+0x1E01+i);
278 }
279 writeb(0x00, ram_mapped+0x1E01);
280 for(jif=jiffies+TR_BUSY_INTERVAL; time_before_eq(jiffies,jif););
281 intf_tbl=ntohs(readw(ram_mapped+ACA_OFFSET+ACA_RW+WRBR_EVEN));
282 if (intf_tbl) {
283#if IBMTR_DEBUG_MESSAGES
284 printk("ibmtr::find_turbo_adapters, Turbo found at "
285 "ram_addr %x\n",ram_addr);
286 printk("ibmtr::find_turbo_adapters, interface_table ");
287 for(i=0; i<6; i++) {
288 printk("%x:",readb(ram_addr+intf_tbl+i));
289 }
290 printk("\n");
291#endif
292 turbo_io[index]=ntohs(readw(ram_mapped+intf_tbl+4));
293 turbo_irq[index]=readb(ram_mapped+intf_tbl+3);
294 outb(0, turbo_io[index] + ADAPTRESET);
295 for(jif=jiffies+TR_RST_TIME;time_before_eq(jiffies,jif););
296 outb(0, turbo_io[index] + ADAPTRESETREL);
297 index++;
298 continue;
299 }
300#if IBMTR_DEBUG_MESSAGES
301 printk("ibmtr::find_turbo_adapters, ibmtr card found at"
302 " %x but not a Turbo model\n",ram_addr);
303#endif
304 iounmap(ram_mapped) ;
305 } /* for */
306 for(i=0; i<IBMTR_MAX_ADAPTERS; i++) {
307 if(!turbo_io[i]) break;
308 for (j=0; j<IBMTR_MAX_ADAPTERS; j++) {
309 if ( iolist[j] && iolist[j] != turbo_io[i]) continue;
310 iolist[j]=turbo_io[i];
311 break;
312 }
313 }
314}
315
316static void ibmtr_cleanup_card(struct net_device *dev)
317{
318 if (dev->base_addr) {
319 outb(0,dev->base_addr+ADAPTRESET);
320
3173c890 321 schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */
1da177e4
LT		 322
323 outb(0,dev->base_addr+ADAPTRESETREL);
324 }
325
326#ifndef PCMCIA
327 free_irq(dev->irq, dev);
328 release_region(dev->base_addr, IBMTR_IO_EXTENT);
329
330 {
331 struct tok_info *ti = (struct tok_info *) dev->priv;
332 iounmap(ti->mmio);
333 iounmap(ti->sram_virt);
334 }
335#endif
336}
337
338int ibmtr_probe_card(struct net_device *dev)
339{
340 int err = ibmtr_probe(dev);
341 if (!err) {
342 err = register_netdev(dev);
343 if (err)
344 ibmtr_cleanup_card(dev);
345 }
346 return err;
347}
348
349/****************************************************************************
350 * ibmtr_probe(): Routine specified in the network device structure
351 * to probe for an IBM Token Ring Adapter. Routine outline:
352 * I. Interrogate hardware to determine if an adapter exists
353 * and what the speeds and feeds are
354 * II. Setup data structures to control execution based upon
355 * adapter characteristics.
356 *
357 * We expect ibmtr_probe to be called once for each device entry
358 * which references it.
359 ****************************************************************************/
360
361static int ibmtr_probe(struct net_device *dev)
362{
363 int i;
364 int base_addr = dev->base_addr;
365
366 if (base_addr && base_addr <= 0x1ff) /* Don't probe at all. */
367 return -ENXIO;
368 if (base_addr > 0x1ff) { /* Check a single specified location. */
369 if (!ibmtr_probe1(dev, base_addr)) return 0;
370 return -ENODEV;
371 }
372 find_turbo_adapters(ibmtr_portlist);
373 for (i = 0; ibmtr_portlist[i]; i++) {
374 int ioaddr = ibmtr_portlist[i];
375
376 if (!ibmtr_probe1(dev, ioaddr)) return 0;
377 }
378 return -ENODEV;
379}
380
381/*****************************************************************************/
382
383static int __devinit ibmtr_probe1(struct net_device *dev, int PIOaddr)
384{
385
386 unsigned char segment, intr=0, irq=0, i, j, cardpresent=NOTOK, temp=0;
387 void __iomem * t_mmio = NULL;
388 struct tok_info *ti = dev->priv;
389 void __iomem *cd_chanid;
390 unsigned char *tchanid, ctemp;
391#ifndef PCMCIA
392 unsigned char t_irq=0;
393 unsigned long timeout;
394 static int version_printed;
395#endif
396
397 /* Query the adapter PIO base port which will return
398 * indication of where MMIO was placed. We also have a
399 * coded interrupt number.
400 */
401 segment = inb(PIOaddr);
402 if (segment < 0x40 || segment > 0xe0) {
403 /* Out of range values so we'll assume non-existent IO device
404 * but this is not necessarily a problem, esp if a turbo
405 * adapter is being used. */
406#if IBMTR_DEBUG_MESSAGES
407 DPRINTK("ibmtr_probe1(): unhappy that inb(0x%X) == 0x%X, "
408 "Hardware Problem?\n",PIOaddr,segment);
409#endif
410 return -ENODEV;
411 }
412 /*
413 * Compute the linear base address of the MMIO area
414 * as LINUX doesn't care about segments
415 */
416 t_mmio = ioremap(((__u32) (segment & 0xfc) << 11) + 0x80000,2048);
417 if (!t_mmio) {
418 DPRINTK("Cannot remap mmiobase memory area") ;
419 return -ENODEV ;
420 }
421 intr = segment & 0x03; /* low bits is coded interrupt # */
422 if (ibmtr_debug_trace & TRC_INIT)
423 DPRINTK("PIOaddr: %4hx seg/intr: %2x mmio base: %p intr: %d\n"
424 , PIOaddr, (int) segment, t_mmio, (int) intr);
425
426 /*
427 * Now we will compare expected 'channelid' strings with
428 * what we is there to learn of ISA/MCA or not TR card
429 */
430#ifdef PCMCIA
431 iounmap(t_mmio);
432 t_mmio = ti->mmio; /*BMS to get virtual address */
433 irq = ti->irq; /*BMS to display the irq! */
434#endif
435 cd_chanid = (CHANNEL_ID + t_mmio); /* for efficiency */
436 tchanid = pcchannelid;
437 cardpresent = TR_ISA; /* try ISA */
438
439 /* Suboptimize knowing first byte different */
440 ctemp = readb(cd_chanid) & 0x0f;
441 if (ctemp != *tchanid) { /* NOT ISA card, try MCA */
442 tchanid = mcchannelid;
443 cardpresent = TR_MCA;
444 if (ctemp != *tchanid) /* Neither ISA nor MCA */
445 cardpresent = NOTOK;
446 }
447 if (cardpresent != NOTOK) {
448 /* Know presumed type, try rest of ID */
449 for (i = 2, j = 1; i <= 46; i = i + 2, j++) {
450 if( (readb(cd_chanid+i)&0x0f) == tchanid[j]) continue;
451 /* match failed, not TR card */
452 cardpresent = NOTOK;
453 break;
454 }
455 }
456 /*
457 * If we have an ISA board check for the ISA P&P version,
458 * as it has different IRQ settings
459 */
460 if (cardpresent == TR_ISA && (readb(AIPFID + t_mmio) == 0x0e))
461 cardpresent = TR_ISAPNP;
462 if (cardpresent == NOTOK) { /* "channel_id" did not match, report */
463 if (!(ibmtr_debug_trace & TRC_INIT)) {
464#ifndef PCMCIA
465 iounmap(t_mmio);
466#endif
467 return -ENODEV;
468 }
469 DPRINTK( "Channel ID string not found for PIOaddr: %4hx\n",
470 PIOaddr);
471 DPRINTK("Expected for ISA: ");
472 PrtChanID(pcchannelid, 1);
473 DPRINTK(" found: ");
474/* BMS Note that this can be misleading, when hardware is flaky, because you
475 are reading it a second time here. So with my flaky hardware, I'll see my-
476 self in this block, with the HW ID matching the ISA ID exactly! */
477 HWPrtChanID(cd_chanid, 2);
478 DPRINTK("Expected for MCA: ");
479 PrtChanID(mcchannelid, 1);
480 }
481 /* Now, setup some of the pl0 buffers for this driver.. */
482 /* If called from PCMCIA, it is already set up, so no need to
483 waste the memory, just use the existing structure */
484#ifndef PCMCIA
485 ti->mmio = t_mmio;
486 for (i = 0; i < IBMTR_MAX_ADAPTERS; i++) {
487 if (turbo_io[i] != PIOaddr)
488 continue;
489#if IBMTR_DEBUG_MESSAGES
490 printk("ibmtr::tr_probe1, setting PIOaddr %x to Turbo\n",
491 PIOaddr);
492#endif
493 ti->turbo = 1;
494 t_irq = turbo_irq[i];
495 }
496#endif /* !PCMCIA */
497 ti->readlog_pending = 0;
498 init_waitqueue_head(&ti->wait_for_reset);
499
500 /* if PCMCIA, the card can be recognized as either TR_ISA or TR_ISAPNP
501 * depending which card is inserted. */
502
503#ifndef PCMCIA
504 switch (cardpresent) {
505 case TR_ISA:
506 if (intr == 0) irq = 9; /* irq2 really is irq9 */
507 if (intr == 1) irq = 3;
508 if (intr == 2) irq = 6;
509 if (intr == 3) irq = 7;
510 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
511 break;
512 case TR_MCA:
513 if (intr == 0) irq = 9;
514 if (intr == 1) irq = 3;
515 if (intr == 2) irq = 10;
516 if (intr == 3) irq = 11;
517 ti->global_int_enable = 0;
518 ti->adapter_int_enable = 0;
519 ti->sram_phys=(__u32)(inb(PIOaddr+ADAPTRESETREL) & 0xfe) << 12;
520 break;
521 case TR_ISAPNP:
522 if (!t_irq) {
523 if (intr == 0) irq = 9;
524 if (intr == 1) irq = 3;
525 if (intr == 2) irq = 10;
526 if (intr == 3) irq = 11;
527 } else
528 irq=t_irq;
529 timeout = jiffies + TR_SPIN_INTERVAL;
530 while (!readb(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN)){
531 if (!time_after(jiffies, timeout)) continue;
532 DPRINTK( "Hardware timeout during initialization.\n");
533 iounmap(t_mmio);
534 kfree(ti);
535 return -ENODEV;
536 }
537 ti->sram_phys =
538 ((__u32)readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_EVEN)<<12);
539 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
540 break;
541 } /*end switch (cardpresent) */
542#endif /*not PCMCIA */
543
544 if (ibmtr_debug_trace & TRC_INIT) { /* just report int */
545 DPRINTK("irq=%d", irq);
546 printk(", sram_phys=0x%x", ti->sram_phys);
547 if(ibmtr_debug_trace&TRC_INITV){ /* full chat in verbose only */
548 DPRINTK(", ti->mmio=%p", ti->mmio);
549 printk(", segment=%02X", segment);
550 }
551 printk(".\n");
552 }
553
554 /* Get hw address of token ring card */
555 j = 0;
556 for (i = 0; i < 0x18; i = i + 2) {
557 /* technical reference states to do this */
558 temp = readb(ti->mmio + AIP + i) & 0x0f;
559 ti->hw_address[j] = temp;
560 if (j & 1)
561 dev->dev_addr[(j / 2)] =
562 ti->hw_address[j]+ (ti->hw_address[j - 1] << 4);
563 ++j;
564 }
565 /* get Adapter type: 'F' = Adapter/A, 'E' = 16/4 Adapter II,... */
566 ti->adapter_type = readb(ti->mmio + AIPADAPTYPE);
567
568 /* get Data Rate: F=4Mb, E=16Mb, D=4Mb & 16Mb ?? */
569 ti->data_rate = readb(ti->mmio + AIPDATARATE);
570
571 /* Get Early Token Release support?: F=no, E=4Mb, D=16Mb, C=4&16Mb */
572 ti->token_release = readb(ti->mmio + AIPEARLYTOKEN);
573
574 /* How much shared RAM is on adapter ? */
575 if (ti->turbo) {
576 ti->avail_shared_ram=127;
577 } else {
578 ti->avail_shared_ram = get_sram_size(ti);/*in 512 byte units */
579 }
580 /* We need to set or do a bunch of work here based on previous results*/
581 /* Support paging? What sizes?: F=no, E=16k, D=32k, C=16 & 32k */
582 ti->shared_ram_paging = readb(ti->mmio + AIPSHRAMPAGE);
583
584 /* Available DHB 4Mb size: F=2048, E=4096, D=4464 */
585 switch (readb(ti->mmio + AIP4MBDHB)) {
586 case 0xe: ti->dhb_size4mb = 4096; break;
587 case 0xd: ti->dhb_size4mb = 4464; break;
588 default: ti->dhb_size4mb = 2048; break;
589 }
590
591 /* Available DHB 16Mb size: F=2048, E=4096, D=8192, C=16384, B=17960 */
592 switch (readb(ti->mmio + AIP16MBDHB)) {
593 case 0xe: ti->dhb_size16mb = 4096; break;
594 case 0xd: ti->dhb_size16mb = 8192; break;
595 case 0xc: ti->dhb_size16mb = 16384; break;
596 case 0xb: ti->dhb_size16mb = 17960; break;
597 default: ti->dhb_size16mb = 2048; break;
598 }
599
600 /* We must figure out how much shared memory space this adapter
601 * will occupy so that if there are two adapters we can fit both
602 * in. Given a choice, we will limit this adapter to 32K. The
603 * maximum space will will use for two adapters is 64K so if the
604 * adapter we are working on demands 64K (it also doesn't support
605 * paging), then only one adapter can be supported.
606 */
607
608 /*
609 * determine how much of total RAM is mapped into PC space
610 */
611 ti->mapped_ram_size= /*sixteen to onehundredtwentyeight 512byte blocks*/
612 1<< ((readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03) + 4);
613 ti->page_mask = 0;
614 if (ti->turbo) ti->page_mask=0xf0;
615 else if (ti->shared_ram_paging == 0xf); /* No paging in adapter */
616 else {
617#ifdef ENABLE_PAGING
618 unsigned char pg_size = 0;
619 /* BMS: page size: PCMCIA, use configuration register;
620 ISAPNP, use LANAIDC config tool from www.ibm.com */
621 switch (ti->shared_ram_paging) {
622 case 0xf:
623 break;
624 case 0xe:
625 ti->page_mask = (ti->mapped_ram_size == 32) ? 0xc0 : 0;
626 pg_size = 32; /* 16KB page size */
627 break;
628 case 0xd:
629 ti->page_mask = (ti->mapped_ram_size == 64) ? 0x80 : 0;
630 pg_size = 64; /* 32KB page size */
631 break;
632 case 0xc:
633 switch (ti->mapped_ram_size) {
634 case 32:
635 ti->page_mask = 0xc0;
636 pg_size = 32;
637 break;
638 case 64:
639 ti->page_mask = 0x80;
640 pg_size = 64;
641 break;
642 }
643 break;
644 default:
645 DPRINTK("Unknown shared ram paging info %01X\n",
646 ti->shared_ram_paging);
647 iounmap(t_mmio);
648 kfree(ti);
649 return -ENODEV;
650 break;
651 } /*end switch shared_ram_paging */
652
653 if (ibmtr_debug_trace & TRC_INIT)
654 DPRINTK("Shared RAM paging code: %02X, "
655 "mapped RAM size: %dK, shared RAM size: %dK, "
656 "page mask: %02X\n:",
657 ti->shared_ram_paging, ti->mapped_ram_size / 2,
658 ti->avail_shared_ram / 2, ti->page_mask);
659#endif /*ENABLE_PAGING */
660 }
661
662#ifndef PCMCIA
663 /* finish figuring the shared RAM address */
664 if (cardpresent == TR_ISA) {
665 static __u32 ram_bndry_mask[] =
666 { 0xffffe000, 0xffffc000, 0xffff8000, 0xffff0000 };
667 __u32 new_base, rrr_32, chk_base, rbm;
668
669 rrr_32=readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03;
670 rbm = ram_bndry_mask[rrr_32];
671 new_base = (ibmtr_mem_base + (~rbm)) & rbm;/* up to boundary */
672 chk_base = new_base + (ti->mapped_ram_size << 9);
673 if (chk_base > (ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE)) {
674 DPRINTK("Shared RAM for this adapter (%05x) exceeds "
675 "driver limit (%05x), adapter not started.\n",
676 chk_base, ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE);
677 iounmap(t_mmio);
678 kfree(ti);
679 return -ENODEV;
680 } else { /* seems cool, record what we have figured out */
681 ti->sram_base = new_base >> 12;
682 ibmtr_mem_base = chk_base;
683 }
684 }
685 else ti->sram_base = ti->sram_phys >> 12;
686
687 /* The PCMCIA has already got the interrupt line and the io port,
688 so no chance of anybody else getting it - MLP */
689 if (request_irq(dev->irq = irq, &tok_interrupt, 0, "ibmtr", dev) != 0) {
690 DPRINTK("Could not grab irq %d. Halting Token Ring driver.\n",
691 irq);
692 iounmap(t_mmio);
693 kfree(ti);
694 return -ENODEV;
695 }
696 /*?? Now, allocate some of the PIO PORTs for this driver.. */
697 /* record PIOaddr range as busy */
698 if (!request_region(PIOaddr, IBMTR_IO_EXTENT, "ibmtr")) {
699 DPRINTK("Could not grab PIO range. Halting driver.\n");
700 free_irq(dev->irq, dev);
701 iounmap(t_mmio);
702 kfree(ti);
703 return -EBUSY;
704 }
705
706 if (!version_printed++) {
707 printk(version);
708 }
709#endif /* !PCMCIA */
710 DPRINTK("%s %s found\n",
711 channel_def[cardpresent - 1], adapter_def(ti->adapter_type));
712 DPRINTK("using irq %d, PIOaddr %hx, %dK shared RAM.\n",
713 irq, PIOaddr, ti->mapped_ram_size / 2);
714 DPRINTK("Hardware address : %02X:%02X:%02X:%02X:%02X:%02X\n",
715 dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
716 dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
717 if (ti->page_mask)
718 DPRINTK("Shared RAM paging enabled. "
719 "Page size: %uK Shared Ram size %dK\n",
720 ((ti->page_mask^0xff)+1) >>2, ti->avail_shared_ram / 2);
721 else
722 DPRINTK("Shared RAM paging disabled. ti->page_mask %x\n",
723 ti->page_mask);
724
725 /* Calculate the maximum DHB we can use */
726 /* two cases where avail_shared_ram doesn't equal mapped_ram_size:
727 1. avail_shared_ram is 127 but mapped_ram_size is 128 (typical)
728 2. user has configured adapter for less than avail_shared_ram
729 but is not using paging (she should use paging, I believe)
730 */
731 if (!ti->page_mask) {
732 ti->avail_shared_ram=
733 min(ti->mapped_ram_size,ti->avail_shared_ram);
734 }
735
736 switch (ti->avail_shared_ram) {
737 case 16: /* 8KB shared RAM */
738 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)2048);
739 ti->rbuf_len4 = 1032;
740 ti->rbuf_cnt4=2;
741 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)2048);
742 ti->rbuf_len16 = 1032;
743 ti->rbuf_cnt16=2;
744 break;
745 case 32: /* 16KB shared RAM */
746 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
747 ti->rbuf_len4 = 1032;
748 ti->rbuf_cnt4=4;
749 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)4096);
750 ti->rbuf_len16 = 1032; /*1024 usable */
751 ti->rbuf_cnt16=4;
752 break;
753 case 64: /* 32KB shared RAM */
754 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
755 ti->rbuf_len4 = 1032;
756 ti->rbuf_cnt4=6;
757 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)10240);
758 ti->rbuf_len16 = 1032;
759 ti->rbuf_cnt16=6;
760 break;
761 case 127: /* 63.5KB shared RAM */
762 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
763 ti->rbuf_len4 = 1032;
764 ti->rbuf_cnt4=6;
765 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)16384);
766 ti->rbuf_len16 = 1032;
767 ti->rbuf_cnt16=16;
768 break;
769 case 128: /* 64KB shared RAM */
770 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
771 ti->rbuf_len4 = 1032;
772 ti->rbuf_cnt4=6;
773 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)17960);
774 ti->rbuf_len16 = 1032;
775 ti->rbuf_cnt16=16;
776 break;
777 default:
778 ti->dhb_size4mb = 2048;
779 ti->rbuf_len4 = 1032;
780 ti->rbuf_cnt4=2;
781 ti->dhb_size16mb = 2048;
782 ti->rbuf_len16 = 1032;
783 ti->rbuf_cnt16=2;
784 break;
785 }
786 /* this formula is not smart enough for the paging case
787 ti->rbuf_cnt<x> = (ti->avail_shared_ram * BLOCKSZ - ADAPT_PRIVATE -
788 ARBLENGTH - SSBLENGTH - DLC_MAX_SAP * SAPLENGTH -
789 DLC_MAX_STA * STALENGTH - ti->dhb_size<x>mb * NUM_DHB -
790 SRBLENGTH - ASBLENGTH) / ti->rbuf_len<x>;
791 */
792 ti->maxmtu16 = (ti->rbuf_len16 - 8) * ti->rbuf_cnt16 - TR_HLEN;
793 ti->maxmtu4 = (ti->rbuf_len4 - 8) * ti->rbuf_cnt4 - TR_HLEN;
794 /*BMS assuming 18 bytes of Routing Information (usually works) */
795 DPRINTK("Maximum Receive Internet Protocol MTU 16Mbps: %d, 4Mbps: %d\n",
796 ti->maxmtu16, ti->maxmtu4);
797
798 dev->base_addr = PIOaddr; /* set the value for device */
799 dev->mem_start = ti->sram_base << 12;
800 dev->mem_end = dev->mem_start + (ti->mapped_ram_size << 9) - 1;
801 trdev_init(dev);
802 return 0; /* Return 0 to indicate we have found a Token Ring card. */
803} /*ibmtr_probe1() */
804
805/*****************************************************************************/
806
807/* query the adapter for the size of shared RAM */
808/* the function returns the RAM size in units of 512 bytes */
809
810static unsigned char __devinit get_sram_size(struct tok_info *adapt_info)
811{
812 unsigned char avail_sram_code;
813 static unsigned char size_code[] = { 0, 16, 32, 64, 127, 128 };
814 /* Adapter gives
815 'F' -- use RRR bits 3,2
816 'E' -- 8kb 'D' -- 16kb
817 'C' -- 32kb 'A' -- 64KB
818 'B' - 64KB less 512 bytes at top
819 (WARNING ... must zero top bytes in INIT */
820
821 avail_sram_code = 0xf - readb(adapt_info->mmio + AIPAVAILSHRAM);
822 if (avail_sram_code) return size_code[avail_sram_code];
823 else /* for code 'F', must compute size from RRR(3,2) bits */
824 return 1 <<
825 ((readb(adapt_info->mmio+ACA_OFFSET+ACA_RW+RRR_ODD)>>2&3)+4);
826}
827
828/*****************************************************************************/
829
830static int __devinit trdev_init(struct net_device *dev)
831{
832 struct tok_info *ti = (struct tok_info *) dev->priv;
833
834 SET_PAGE(ti->srb_page);
835 ti->open_failure = NO ;
836 dev->open = tok_open;
837 dev->stop = tok_close;
838 dev->hard_start_xmit = tok_send_packet;
839 dev->get_stats = tok_get_stats;
840 dev->set_multicast_list = tok_set_multicast_list;
841 dev->change_mtu = ibmtr_change_mtu;
842
843 return 0;
844}
845
846/*****************************************************************************/
847
848static int tok_init_card(struct net_device *dev)
849{
850 struct tok_info *ti;
851 short PIOaddr;
852 unsigned long i;
853
854 PIOaddr = dev->base_addr;
855 ti = (struct tok_info *) dev->priv;
856 /* Special processing for first interrupt after reset */
857 ti->do_tok_int = FIRST_INT;
858 /* Reset adapter */
859 writeb(~INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
860 outb(0, PIOaddr + ADAPTRESET);
861
3173c890 862 schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */
1da177e4
LT		 863
864 outb(0, PIOaddr + ADAPTRESETREL);
865#ifdef ENABLE_PAGING
866 if (ti->page_mask)
867 writeb(SRPR_ENABLE_PAGING,ti->mmio+ACA_OFFSET+ACA_RW+SRPR_EVEN);
868#endif
869 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
870 i = sleep_on_timeout(&ti->wait_for_reset, 4 * HZ);
871 return i? 0 : -EAGAIN;
872}
873
874/*****************************************************************************/
875static int tok_open(struct net_device *dev)
876{
877 struct tok_info *ti = (struct tok_info *) dev->priv;
878 int i;
879
880 /*the case we were left in a failure state during a previous open */
881 if (ti->open_failure == YES) {
882 DPRINTK("Last time you were disconnected, how about now?\n");
883 printk("You can't insert with an ICS connector half-cocked.\n");
884 }
885
886 ti->open_status = CLOSED; /* CLOSED or OPEN */
887 ti->sap_status = CLOSED; /* CLOSED or OPEN */
888 ti->open_failure = NO; /* NO or YES */
889 ti->open_mode = MANUAL; /* MANUAL or AUTOMATIC */
1da177e4
LT		 890
891 ti->sram_phys &= ~1; /* to reverse what we do in tok_close */
892 /* init the spinlock */
893 spin_lock_init(&ti->lock);
894 init_timer(&ti->tr_timer);
895
896 i = tok_init_card(dev);
897 if (i) return i;
898
899 while (1){
900 tok_open_adapter((unsigned long) dev);
901 i= interruptible_sleep_on_timeout(&ti->wait_for_reset, 25 * HZ);
902 /* sig catch: estimate opening adapter takes more than .5 sec*/
903 if (i>(245*HZ)/10) break; /* fancier than if (i==25*HZ) */
904 if (i==0) break;
905 if (ti->open_status == OPEN && ti->sap_status==OPEN) {
906 netif_start_queue(dev);
907 DPRINTK("Adapter is up and running\n");
908 return 0;
909 }
3173c890
NA		 910 i=schedule_timeout_interruptible(TR_RETRY_INTERVAL);
911 /* wait 30 seconds */
1da177e4
LT		 912 if(i!=0) break; /*prob. a signal, like the i>24*HZ case above */
913 }
914 outb(0, dev->base_addr + ADAPTRESET);/* kill pending interrupts*/
915 DPRINTK("TERMINATED via signal\n"); /*BMS useful */
916 return -EAGAIN;
917}
918
919/*****************************************************************************/
920
921#define COMMAND_OFST 0
922#define OPEN_OPTIONS_OFST 8
923#define NUM_RCV_BUF_OFST 24
924#define RCV_BUF_LEN_OFST 26
925#define DHB_LENGTH_OFST 28
926#define NUM_DHB_OFST 30
927#define DLC_MAX_SAP_OFST 32
928#define DLC_MAX_STA_OFST 33
929
de70b4c8 930static void tok_open_adapter(unsigned long dev_addr)
1da177e4
LT		 931{
932 struct net_device *dev = (struct net_device *) dev_addr;
933 struct tok_info *ti;
934 int i;
935
936 ti = (struct tok_info *) dev->priv;
937 SET_PAGE(ti->init_srb_page);
938 writeb(~SRB_RESP_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD);
939 for (i = 0; i < sizeof(struct dir_open_adapter); i++)
940 writeb(0, ti->init_srb + i);
941 writeb(DIR_OPEN_ADAPTER, ti->init_srb + COMMAND_OFST);
942 writew(htons(OPEN_PASS_BCON_MAC), ti->init_srb + OPEN_OPTIONS_OFST);
943 if (ti->ring_speed == 16) {
944 writew(htons(ti->dhb_size16mb), ti->init_srb + DHB_LENGTH_OFST);
945 writew(htons(ti->rbuf_cnt16), ti->init_srb + NUM_RCV_BUF_OFST);
946 writew(htons(ti->rbuf_len16), ti->init_srb + RCV_BUF_LEN_OFST);
947 } else {
948 writew(htons(ti->dhb_size4mb), ti->init_srb + DHB_LENGTH_OFST);
949 writew(htons(ti->rbuf_cnt4), ti->init_srb + NUM_RCV_BUF_OFST);
950 writew(htons(ti->rbuf_len4), ti->init_srb + RCV_BUF_LEN_OFST);
951 }
952 writeb(NUM_DHB, /* always 2 */ ti->init_srb + NUM_DHB_OFST);
953 writeb(DLC_MAX_SAP, ti->init_srb + DLC_MAX_SAP_OFST);
954 writeb(DLC_MAX_STA, ti->init_srb + DLC_MAX_STA_OFST);
955 ti->srb = ti->init_srb; /* We use this one in the interrupt handler */
956 ti->srb_page = ti->init_srb_page;
957 DPRINTK("Opening adapter: Xmit bfrs: %d X %d, Rcv bfrs: %d X %d\n",
958 readb(ti->init_srb + NUM_DHB_OFST),
959 ntohs(readw(ti->init_srb + DHB_LENGTH_OFST)),
960 ntohs(readw(ti->init_srb + NUM_RCV_BUF_OFST)),
961 ntohs(readw(ti->init_srb + RCV_BUF_LEN_OFST)));
962 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
963 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
964}
965
966/*****************************************************************************/
967
968static void open_sap(unsigned char type, struct net_device *dev)
969{
970 int i;
971 struct tok_info *ti = (struct tok_info *) dev->priv;
972
973 SET_PAGE(ti->srb_page);
974 for (i = 0; i < sizeof(struct dlc_open_sap); i++)
975 writeb(0, ti->srb + i);
976
977#define MAX_I_FIELD_OFST 14
978#define SAP_VALUE_OFST 16
979#define SAP_OPTIONS_OFST 17
980#define STATION_COUNT_OFST 18
981
982 writeb(DLC_OPEN_SAP, ti->srb + COMMAND_OFST);
983 writew(htons(MAX_I_FIELD), ti->srb + MAX_I_FIELD_OFST);
984 writeb(SAP_OPEN_IND_SAP | SAP_OPEN_PRIORITY, ti->srb+ SAP_OPTIONS_OFST);
985 writeb(SAP_OPEN_STATION_CNT, ti->srb + STATION_COUNT_OFST);
986 writeb(type, ti->srb + SAP_VALUE_OFST);
987 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
988}
989
990
991/*****************************************************************************/
992
993static void tok_set_multicast_list(struct net_device *dev)
994{
995 struct tok_info *ti = (struct tok_info *) dev->priv;
996 struct dev_mc_list *mclist;
997 unsigned char address[4];
998
999 int i;
1000
1001 /*BMS the next line is CRUCIAL or you may be sad when you */
1002 /*BMS ifconfig tr down or hot unplug a PCMCIA card ??hownowbrowncow*/
1003 if (/*BMSHELPdev->start == 0 ||*/ ti->open_status != OPEN) return;
1004 address[0] = address[1] = address[2] = address[3] = 0;
1005 mclist = dev->mc_list;
1006 for (i = 0; i < dev->mc_count; i++) {
1007 address[0] |= mclist->dmi_addr[2];
1008 address[1] |= mclist->dmi_addr[3];
1009 address[2] |= mclist->dmi_addr[4];
1010 address[3] |= mclist->dmi_addr[5];
1011 mclist = mclist->next;
1012 }
1013 SET_PAGE(ti->srb_page);
1014 for (i = 0; i < sizeof(struct srb_set_funct_addr); i++)
1015 writeb(0, ti->srb + i);
1016
1017#define FUNCT_ADDRESS_OFST 6
1018
1019 writeb(DIR_SET_FUNC_ADDR, ti->srb + COMMAND_OFST);
1020 for (i = 0; i < 4; i++)
1021 writeb(address[i], ti->srb + FUNCT_ADDRESS_OFST + i);
1022 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1023#if TR_VERBOSE
1024 DPRINTK("Setting functional address: ");
1025 for (i=0;i<4;i++) printk("%02X ", address[i]);
1026 printk("\n");
1027#endif
1028}
1029
1030/*****************************************************************************/
1031
1032#define STATION_ID_OFST 4
1033
1034static int tok_send_packet(struct sk_buff *skb, struct net_device *dev)
1035{
1036 struct tok_info *ti;
1037 unsigned long flags;
1038 ti = (struct tok_info *) dev->priv;
1039
1040 netif_stop_queue(dev);
1041
1042 /* lock against other CPUs */
1043 spin_lock_irqsave(&(ti->lock), flags);
1044
1045 /* Save skb; we'll need it when the adapter asks for the data */
1046 ti->current_skb = skb;
1047 SET_PAGE(ti->srb_page);
1048 writeb(XMIT_UI_FRAME, ti->srb + COMMAND_OFST);
1049 writew(ti->exsap_station_id, ti->srb + STATION_ID_OFST);
1050 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1051 spin_unlock_irqrestore(&(ti->lock), flags);
1052 dev->trans_start = jiffies;
1053 return 0;
1054}
1055
1056/*****************************************************************************/
1057
1058static int tok_close(struct net_device *dev)
1059{
1060 struct tok_info *ti = (struct tok_info *) dev->priv;
1061
1062 /* Important for PCMCIA hot unplug, otherwise, we'll pull the card, */
1063 /* unloading the module from memory, and then if a timer pops, ouch */
1064 del_timer_sync(&ti->tr_timer);
1065 outb(0, dev->base_addr + ADAPTRESET);
1066 ti->sram_phys |= 1;
1067 ti->open_status = CLOSED;
1068
1069 netif_stop_queue(dev);
1070 DPRINTK("Adapter is closed.\n");
1071 return 0;
1072}
1073
1074/*****************************************************************************/
1075
1076#define RETCODE_OFST 2
1077#define OPEN_ERROR_CODE_OFST 6
1078#define ASB_ADDRESS_OFST 8
1079#define SRB_ADDRESS_OFST 10
1080#define ARB_ADDRESS_OFST 12
1081#define SSB_ADDRESS_OFST 14
1082
1083static char *printphase[]= {"Lobe media test","Physical insertion",
1084 "Address verification","Roll call poll","Request Parameters"};
1085static char *printerror[]={"Function failure","Signal loss","Reserved",
1086 "Frequency error","Timeout","Ring failure","Ring beaconing",
1087 "Duplicate node address",
1088 "Parameter request-retry count exceeded","Remove received",
1089 "IMPL force received","Duplicate modifier",
1090 "No monitor detected","Monitor contention failed for RPL"};
1091
1092static void __iomem *map_address(struct tok_info *ti, unsigned index, __u8 *page)
1093{
1094 if (ti->page_mask) {
1095 *page = (index >> 8) & ti->page_mask;
1096 index &= ~(ti->page_mask << 8);
1097 }
1098 return ti->sram_virt + index;
1099}
1100
de70b4c8 1101static void dir_open_adapter (struct net_device *dev)
1da177e4
LT		 1102{
1103 struct tok_info *ti = (struct tok_info *) dev->priv;
1104 unsigned char ret_code;
1105 __u16 err;
1106
1107 ti->srb = map_address(ti,
1108 ntohs(readw(ti->init_srb + SRB_ADDRESS_OFST)),
1109 &ti->srb_page);
1110 ti->ssb = map_address(ti,
1111 ntohs(readw(ti->init_srb + SSB_ADDRESS_OFST)),
1112 &ti->ssb_page);
1113 ti->arb = map_address(ti,
1114 ntohs(readw(ti->init_srb + ARB_ADDRESS_OFST)),
1115 &ti->arb_page);
1116 ti->asb = map_address(ti,
1117 ntohs(readw(ti->init_srb + ASB_ADDRESS_OFST)),
1118 &ti->asb_page);
1119 ti->current_skb = NULL;
1120 ret_code = readb(ti->init_srb + RETCODE_OFST);
1121 err = ntohs(readw(ti->init_srb + OPEN_ERROR_CODE_OFST));
1122 if (!ret_code) {
1123 ti->open_status = OPEN; /* TR adapter is now available */
1124 if (ti->open_mode == AUTOMATIC) {
1125 DPRINTK("Adapter reopened.\n");
1126 }
1127 writeb(~SRB_RESP_INT, ti->mmio+ACA_OFFSET+ACA_RESET+ISRP_ODD);
1128 open_sap(EXTENDED_SAP, dev);
1129 return;
1130 }
1131 ti->open_failure = YES;
1132 if (ret_code == 7){
1133 if (err == 0x24) {
1134 if (!ti->auto_speedsave) {
1135 DPRINTK("Open failed: Adapter speed must match "
1136 "ring speed if Automatic Ring Speed Save is "
1137 "disabled.\n");
1138 ti->open_action = FAIL;
1139 }else
1140 DPRINTK("Retrying open to adjust to "
1141 "ring speed, ");
1142 } else if (err == 0x2d) {
1143 DPRINTK("Physical Insertion: No Monitor Detected, ");
1144 printk("retrying after %ds delay...\n",
1145 TR_RETRY_INTERVAL/HZ);
1146 } else if (err == 0x11) {
1147 DPRINTK("Lobe Media Function Failure (0x11), ");
1148 printk(" retrying after %ds delay...\n",
1149 TR_RETRY_INTERVAL/HZ);
1150 } else {
1151 char **prphase = printphase;
1152 char **prerror = printerror;
1153 DPRINTK("TR Adapter misc open failure, error code = ");
1154 printk("0x%x, Phase: %s, Error: %s\n",
1155 err, prphase[err/16 -1], prerror[err%16 -1]);
1156 printk(" retrying after %ds delay...\n",
1157 TR_RETRY_INTERVAL/HZ);
1158 }
1159 } else DPRINTK("open failed: ret_code = %02X..., ", ret_code);
1160 if (ti->open_action != FAIL) {
1161 if (ti->open_mode==AUTOMATIC){
1162 ti->open_action = REOPEN;
1163 ibmtr_reset_timer(&(ti->tr_timer), dev);
1164 return;
1165 }
1166 wake_up(&ti->wait_for_reset);
1167 return;
1168 }
1169 DPRINTK("FAILURE, CAPUT\n");
1170}
1171
1172/******************************************************************************/
1173
de70b4c8 1174static irqreturn_t tok_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1da177e4
LT		 1175{
1176 unsigned char status;
1177 /* unsigned char status_even ; */
1178 struct tok_info *ti;
1179 struct net_device *dev;
1180#ifdef ENABLE_PAGING
1181 unsigned char save_srpr;
1182#endif
1183
1184 dev = dev_id;
1185#if TR_VERBOSE
1186 DPRINTK("Int from tok_driver, dev : %p irq%d regs=%p\n", dev,irq,regs);
1187#endif
1188 ti = (struct tok_info *) dev->priv;
1189 if (ti->sram_phys & 1)
1190 return IRQ_NONE; /* PCMCIA card extraction flag */
1191 spin_lock(&(ti->lock));
1192#ifdef ENABLE_PAGING
1193 save_srpr = readb(ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1194#endif
1195
1196 /* Disable interrupts till processing is finished */
1197 writeb((~INT_ENABLE), ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1198
1199 /* Reset interrupt for ISA boards */
1200 if (ti->adapter_int_enable)
1201 outb(0, ti->adapter_int_enable);
1202 else /* used for PCMCIA cards */
1203 outb(0, ti->global_int_enable);
1204 if (ti->do_tok_int == FIRST_INT){
1205 initial_tok_int(dev);
1206#ifdef ENABLE_PAGING
1207 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1208#endif
1209 spin_unlock(&(ti->lock));
1210 return IRQ_HANDLED;
1211 }
1212 /* Begin interrupt handler HERE inline to avoid the extra
1213 levels of logic and call depth for the original solution. */
1214 status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_ODD);
1215 /*BMSstatus_even = readb (ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN) */
1216 /*BMSdebugprintk("tok_interrupt: ISRP_ODD = 0x%x ISRP_EVEN = 0x%x\n", */
1217 /*BMS status,status_even); */
1218
1219 if (status & ADAP_CHK_INT) {
1220 int i;
1221 void __iomem *check_reason;
1222 __u8 check_reason_page = 0;
1223 check_reason = map_address(ti,
1224 ntohs(readw(ti->mmio+ ACA_OFFSET+ACA_RW + WWCR_EVEN)),
1225 &check_reason_page);
1226 SET_PAGE(check_reason_page);
1227
1228 DPRINTK("Adapter check interrupt\n");
1229 DPRINTK("8 reason bytes follow: ");
1230 for (i = 0; i < 8; i++, check_reason++)
1231 printk("%02X ", (int) readb(check_reason));
1232 printk("\n");
1233 writeb(~ADAP_CHK_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1234 status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRA_EVEN);
1235 DPRINTK("ISRA_EVEN == 0x02%x\n",status);
1236 ti->open_status = CLOSED;
1237 ti->sap_status = CLOSED;
1238 ti->open_mode = AUTOMATIC;
7d17c1d6 1239 netif_carrier_off(dev);
1da177e4
LT		 1240 netif_stop_queue(dev);
1241 ti->open_action = RESTART;
1242 outb(0, dev->base_addr + ADAPTRESET);
1243 ibmtr_reset_timer(&(ti->tr_timer), dev);/*BMS try to reopen*/
1244 spin_unlock(&(ti->lock));
1245 return IRQ_HANDLED;
1246 }
1247 if (readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN)
1248 & (TCR_INT | ERR_INT | ACCESS_INT)) {
1249 DPRINTK("adapter error: ISRP_EVEN : %02x\n",
1250 (int)readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRP_EVEN));
1251 writeb(~(TCR_INT | ERR_INT | ACCESS_INT),
1252 ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1253 status= readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRA_EVEN);/*BMS*/
1254 DPRINTK("ISRA_EVEN == 0x02%x\n",status);/*BMS*/
1255 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1256#ifdef ENABLE_PAGING
1257 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1258#endif
1259 spin_unlock(&(ti->lock));
1260 return IRQ_HANDLED;
1261 }
1262 if (status & SRB_RESP_INT) { /* SRB response */
1263 SET_PAGE(ti->srb_page);
1264#if TR_VERBOSE
1265 DPRINTK("SRB resp: cmd=%02X rsp=%02X\n",
1266 readb(ti->srb), readb(ti->srb + RETCODE_OFST));
1267#endif
1268 switch (readb(ti->srb)) { /* SRB command check */
1269 case XMIT_DIR_FRAME:{
1270 unsigned char xmit_ret_code;
1271 xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1272 if (xmit_ret_code == 0xff) break;
1273 DPRINTK("error on xmit_dir_frame request: %02X\n",
1274 xmit_ret_code);
1275 if (ti->current_skb) {
1276 dev_kfree_skb_irq(ti->current_skb);
1277 ti->current_skb = NULL;
1278 }
1279 /*dev->tbusy = 0;*/
1280 netif_wake_queue(dev);
1281 if (ti->readlog_pending)
1282 ibmtr_readlog(dev);
1283 break;
1284 }
1285 case XMIT_UI_FRAME:{
1286 unsigned char xmit_ret_code;
1287
1288 xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1289 if (xmit_ret_code == 0xff) break;
1290 DPRINTK("error on xmit_ui_frame request: %02X\n",
1291 xmit_ret_code);
1292 if (ti->current_skb) {
1293 dev_kfree_skb_irq(ti->current_skb);
1294 ti->current_skb = NULL;
1295 }
1296 netif_wake_queue(dev);
1297 if (ti->readlog_pending)
1298 ibmtr_readlog(dev);
1299 break;
1300 }
1301 case DIR_OPEN_ADAPTER:
1302 dir_open_adapter(dev);
1303 break;
1304 case DLC_OPEN_SAP:
1305 if (readb(ti->srb + RETCODE_OFST)) {
1306 DPRINTK("open_sap failed: ret_code = %02X, "
1307 "retrying\n",
1308 (int) readb(ti->srb + RETCODE_OFST));
1309 ti->open_action = REOPEN;
1310 ibmtr_reset_timer(&(ti->tr_timer), dev);
1311 break;
1312 }
1313 ti->exsap_station_id = readw(ti->srb + STATION_ID_OFST);
1314 ti->sap_status = OPEN;/* TR adapter is now available */
1315 if (ti->open_mode==MANUAL){
1316 wake_up(&ti->wait_for_reset);
1317 break;
1318 }
1319 netif_wake_queue(dev);
7d17c1d6 1320 netif_carrier_on(dev);
1da177e4
LT		 1321 break;
1322 case DIR_INTERRUPT:
1323 case DIR_MOD_OPEN_PARAMS:
1324 case DIR_SET_GRP_ADDR:
1325 case DIR_SET_FUNC_ADDR:
1326 case DLC_CLOSE_SAP:
1327 if (readb(ti->srb + RETCODE_OFST))
1328 DPRINTK("error on %02X: %02X\n",
1329 (int) readb(ti->srb + COMMAND_OFST),
1330 (int) readb(ti->srb + RETCODE_OFST));
1331 break;
1332 case DIR_READ_LOG:
1333 if (readb(ti->srb + RETCODE_OFST)){
1334 DPRINTK("error on dir_read_log: %02X\n",
1335 (int) readb(ti->srb + RETCODE_OFST));
1336 netif_wake_queue(dev);
1337 break;
1338 }
1339#if IBMTR_DEBUG_MESSAGES
1340
1341#define LINE_ERRORS_OFST 0
1342#define INTERNAL_ERRORS_OFST 1
1343#define BURST_ERRORS_OFST 2
1344#define AC_ERRORS_OFST 3
1345#define ABORT_DELIMITERS_OFST 4
1346#define LOST_FRAMES_OFST 6
1347#define RECV_CONGEST_COUNT_OFST 7
1348#define FRAME_COPIED_ERRORS_OFST 8
1349#define FREQUENCY_ERRORS_OFST 9
1350#define TOKEN_ERRORS_OFST 10
1351
1352 DPRINTK("Line errors %02X, Internal errors %02X, "
1353 "Burst errors %02X\n" "A/C errors %02X, "
1354 "Abort delimiters %02X, Lost frames %02X\n"
1355 "Receive congestion count %02X, "
1356 "Frame copied errors %02X\nFrequency errors %02X, "
1357 "Token errors %02X\n",
1358 (int) readb(ti->srb + LINE_ERRORS_OFST),
1359 (int) readb(ti->srb + INTERNAL_ERRORS_OFST),
1360 (int) readb(ti->srb + BURST_ERRORS_OFST),
1361 (int) readb(ti->srb + AC_ERRORS_OFST),
1362 (int) readb(ti->srb + ABORT_DELIMITERS_OFST),
1363 (int) readb(ti->srb + LOST_FRAMES_OFST),
1364 (int) readb(ti->srb + RECV_CONGEST_COUNT_OFST),
1365 (int) readb(ti->srb + FRAME_COPIED_ERRORS_OFST),
1366 (int) readb(ti->srb + FREQUENCY_ERRORS_OFST),
1367 (int) readb(ti->srb + TOKEN_ERRORS_OFST));
1368#endif
1369 netif_wake_queue(dev);
1370 break;
1371 default:
1372 DPRINTK("Unknown command %02X encountered\n",
1373 (int) readb(ti->srb));
1374 } /* end switch SRB command check */
1375 writeb(~SRB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1376 } /* if SRB response */
1377 if (status & ASB_FREE_INT) { /* ASB response */
1378 SET_PAGE(ti->asb_page);
1379#if TR_VERBOSE
1380 DPRINTK("ASB resp: cmd=%02X\n", readb(ti->asb));
1381#endif
1382
1383 switch (readb(ti->asb)) { /* ASB command check */
1384 case REC_DATA:
1385 case XMIT_UI_FRAME:
1386 case XMIT_DIR_FRAME:
1387 break;
1388 default:
1389 DPRINTK("unknown command in asb %02X\n",
1390 (int) readb(ti->asb));
1391 } /* switch ASB command check */
1392 if (readb(ti->asb + 2) != 0xff) /* checks ret_code */
1393 DPRINTK("ASB error %02X in cmd %02X\n",
1394 (int) readb(ti->asb + 2), (int) readb(ti->asb));
1395 writeb(~ASB_FREE_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1396 } /* if ASB response */
1397
1398#define STATUS_OFST 6
1399#define NETW_STATUS_OFST 6
1400
1401 if (status & ARB_CMD_INT) { /* ARB response */
1402 SET_PAGE(ti->arb_page);
1403#if TR_VERBOSE
1404 DPRINTK("ARB resp: cmd=%02X\n", readb(ti->arb));
1405#endif
1406
1407 switch (readb(ti->arb)) { /* ARB command check */
1408 case DLC_STATUS:
1409 DPRINTK("DLC_STATUS new status: %02X on station %02X\n",
1410 ntohs(readw(ti->arb + STATUS_OFST)),
1411 ntohs(readw(ti->arb+ STATION_ID_OFST)));
1412 break;
1413 case REC_DATA:
1414 tr_rx(dev);
1415 break;
1416 case RING_STAT_CHANGE:{
1417 unsigned short ring_status;
1418 ring_status= ntohs(readw(ti->arb + NETW_STATUS_OFST));
1419 if (ibmtr_debug_trace & TRC_INIT)
1420 DPRINTK("Ring Status Change...(0x%x)\n",
1421 ring_status);
1422 if(ring_status& (REMOVE_RECV|AUTO_REMOVAL|LOBE_FAULT)){
1423 netif_stop_queue(dev);
7d17c1d6 1424 netif_carrier_off(dev);
1da177e4
LT		 1425 DPRINTK("Remove received, or Auto-removal error"
1426 ", or Lobe fault\n");
1427 DPRINTK("We'll try to reopen the closed adapter"
1428 " after a %d second delay.\n",
1429 TR_RETRY_INTERVAL/HZ);
1430 /*I was confused: I saw the TR reopening but */
1431 /*forgot:with an RJ45 in an RJ45/ICS adapter */
1432 /*but adapter not in the ring, the TR will */
1433 /* open, and then soon close and come here. */
1434 ti->open_mode = AUTOMATIC;
1435 ti->open_status = CLOSED; /*12/2000 BMS*/
1436 ti->open_action = REOPEN;
1437 ibmtr_reset_timer(&(ti->tr_timer), dev);
1438 } else if (ring_status & LOG_OVERFLOW) {
1439 if(netif_queue_stopped(dev))
1440 ti->readlog_pending = 1;
1441 else
1442 ibmtr_readlog(dev);
1443 }
1444 break;
1445 }
1446 case XMIT_DATA_REQ:
1447 tr_tx(dev);
1448 break;
1449 default:
1450 DPRINTK("Unknown command %02X in arb\n",
1451 (int) readb(ti->arb));
1452 break;
1453 } /* switch ARB command check */
1454 writeb(~ARB_CMD_INT, ti->mmio+ ACA_OFFSET+ACA_RESET + ISRP_ODD);
1455 writeb(ARB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1456 } /* if ARB response */
1457 if (status & SSB_RESP_INT) { /* SSB response */
1458 unsigned char retcode;
1459 SET_PAGE(ti->ssb_page);
1460#if TR_VERBOSE
1461 DPRINTK("SSB resp: cmd=%02X rsp=%02X\n",
1462 readb(ti->ssb), readb(ti->ssb + 2));
1463#endif
1464
1465 switch (readb(ti->ssb)) { /* SSB command check */
1466 case XMIT_DIR_FRAME:
1467 case XMIT_UI_FRAME:
1468 retcode = readb(ti->ssb + 2);
1469 if (retcode && (retcode != 0x22))/* checks ret_code */
1470 DPRINTK("xmit ret_code: %02X xmit error code: "
1471 "%02X\n",
1472 (int)retcode, (int)readb(ti->ssb + 6));
1473 else
1474 ti->tr_stats.tx_packets++;
1475 break;
1476 case XMIT_XID_CMD:
1477 DPRINTK("xmit xid ret_code: %02X\n",
1478 (int) readb(ti->ssb + 2));
1479 default:
1480 DPRINTK("Unknown command %02X in ssb\n",
1481 (int) readb(ti->ssb));
1482 } /* SSB command check */
1483 writeb(~SSB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1484 writeb(SSB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1485 } /* if SSB response */
1486#ifdef ENABLE_PAGING
1487 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1488#endif
1489 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1490 spin_unlock(&(ti->lock));
1491 return IRQ_HANDLED;
1492} /*tok_interrupt */
1493
1494/*****************************************************************************/
1495
1496#define INIT_STATUS_OFST 1
1497#define INIT_STATUS_2_OFST 2
1498#define ENCODED_ADDRESS_OFST 8
1499
1500static void initial_tok_int(struct net_device *dev)
1501{
1502
1503 __u32 encoded_addr, hw_encoded_addr;
1504 struct tok_info *ti;
1505 unsigned char init_status; /*BMS 12/2000*/
1506
1507 ti = (struct tok_info *) dev->priv;
1508
1509 ti->do_tok_int = NOT_FIRST;
1510
1511 /* we assign the shared-ram address for ISA devices */
1512 writeb(ti->sram_base, ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN);
1513#ifndef PCMCIA
1514 ti->sram_virt = ioremap(((__u32)ti->sram_base << 12), ti->avail_shared_ram);
1515#endif
1516 ti->init_srb = map_address(ti,
1517 ntohs(readw(ti->mmio + ACA_OFFSET + WRBR_EVEN)),
1518 &ti->init_srb_page);
1519 if (ti->page_mask && ti->avail_shared_ram == 127) {
1520 void __iomem *last_512;
1521 __u8 last_512_page=0;
1522 int i;
1523 last_512 = map_address(ti, 0xfe00, &last_512_page);
1524 /* initialize high section of ram (if necessary) */
1525 SET_PAGE(last_512_page);
1526 for (i = 0; i < 512; i++)
1527 writeb(0, last_512 + i);
1528 }
1529 SET_PAGE(ti->init_srb_page);
1530
1531#if TR_VERBOSE
1532 {
1533 int i;
1534
1535 DPRINTK("ti->init_srb_page=0x%x\n", ti->init_srb_page);
1536 DPRINTK("init_srb(%p):", ti->init_srb );
1537 for (i = 0; i < 20; i++)
1538 printk("%02X ", (int) readb(ti->init_srb + i));
1539 printk("\n");
1540 }
1541#endif
1542
1543 hw_encoded_addr = readw(ti->init_srb + ENCODED_ADDRESS_OFST);
1544 encoded_addr = ntohs(hw_encoded_addr);
1545 init_status= /*BMS 12/2000 check for shallow mode possibility (Turbo)*/
1546 readb(ti->init_srb+offsetof(struct srb_init_response,init_status));
1547 /*printk("Initial interrupt: init_status= 0x%02x\n",init_status);*/
1548 ti->ring_speed = init_status & 0x01 ? 16 : 4;
1549 DPRINTK("Initial interrupt : %d Mbps, shared RAM base %08x.\n",
1550 ti->ring_speed, (unsigned int)dev->mem_start);
1551 ti->auto_speedsave=readb(ti->init_srb+INIT_STATUS_2_OFST)&4?TRUE:FALSE;
1552
1553 if (ti->open_mode == MANUAL) wake_up(&ti->wait_for_reset);
1554 else tok_open_adapter((unsigned long)dev);
1555
1556} /*initial_tok_int() */
1557
1558/*****************************************************************************/
1559
1560#define CMD_CORRELATE_OFST 1
1561#define DHB_ADDRESS_OFST 6
1562
1563#define FRAME_LENGTH_OFST 6
1564#define HEADER_LENGTH_OFST 8
1565#define RSAP_VALUE_OFST 9
1566
1567static void tr_tx(struct net_device *dev)
1568{
1569 struct tok_info *ti = (struct tok_info *) dev->priv;
1570 struct trh_hdr *trhdr = (struct trh_hdr *) ti->current_skb->data;
1571 unsigned int hdr_len;
1572 __u32 dhb=0,dhb_base;
1573 void __iomem *dhbuf = NULL;
1574 unsigned char xmit_command;
1575 int i,dhb_len=0x4000,src_len,src_offset;
1576 struct trllc *llc;
1577 struct srb_xmit xsrb;
1578 __u8 dhb_page = 0;
1579 __u8 llc_ssap;
1580
1581 SET_PAGE(ti->asb_page);
1582
1583 if (readb(ti->asb+RETCODE_OFST) != 0xFF) DPRINTK("ASB not free !!!\n");
1584
1585 /* in providing the transmit interrupts, is telling us it is ready for
1586 data and providing a shared memory address for us to stuff with data.
1587 Here we compute the effective address where we will place data.
1588 */
1589 SET_PAGE(ti->arb_page);
1590 dhb=dhb_base=ntohs(readw(ti->arb + DHB_ADDRESS_OFST));
1591 if (ti->page_mask) {
1592 dhb_page = (dhb_base >> 8) & ti->page_mask;
1593 dhb=dhb_base & ~(ti->page_mask << 8);
1594 }
1595 dhbuf = ti->sram_virt + dhb;
1596
1597 /* Figure out the size of the 802.5 header */
1598 if (!(trhdr->saddr[0] & 0x80)) /* RIF present? */
1599 hdr_len = sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1600 else
1601 hdr_len = ((ntohs(trhdr->rcf) & TR_RCF_LEN_MASK) >> 8)
1602 + sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1603
1604 llc = (struct trllc *) (ti->current_skb->data + hdr_len);
1605
1606 llc_ssap = llc->ssap;
1607 SET_PAGE(ti->srb_page);
1608 memcpy_fromio(&xsrb, ti->srb, sizeof(xsrb));
1609 SET_PAGE(ti->asb_page);
1610 xmit_command = xsrb.command;
1611
1612 writeb(xmit_command, ti->asb + COMMAND_OFST);
1613 writew(xsrb.station_id, ti->asb + STATION_ID_OFST);
1614 writeb(llc_ssap, ti->asb + RSAP_VALUE_OFST);
1615 writeb(xsrb.cmd_corr, ti->asb + CMD_CORRELATE_OFST);
1616 writeb(0, ti->asb + RETCODE_OFST);
1617 if ((xmit_command == XMIT_XID_CMD) || (xmit_command == XMIT_TEST_CMD)) {
1618 writew(htons(0x11), ti->asb + FRAME_LENGTH_OFST);
1619 writeb(0x0e, ti->asb + HEADER_LENGTH_OFST);
1620 SET_PAGE(dhb_page);
1621 writeb(AC, dhbuf);
1622 writeb(LLC_FRAME, dhbuf + 1);
1623 for (i = 0; i < TR_ALEN; i++)
1624 writeb((int) 0x0FF, dhbuf + i + 2);
1625 for (i = 0; i < TR_ALEN; i++)
1626 writeb(0, dhbuf + i + TR_ALEN + 2);
1627 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1628 return;
1629 }
1630 /*
1631 * the token ring packet is copied from sk_buff to the adapter
1632 * buffer identified in the command data received with the interrupt.
1633 */
1634 writeb(hdr_len, ti->asb + HEADER_LENGTH_OFST);
1635 writew(htons(ti->current_skb->len), ti->asb + FRAME_LENGTH_OFST);
1636 src_len=ti->current_skb->len;
1637 src_offset=0;
1638 dhb=dhb_base;
1639 while(1) {
1640 if (ti->page_mask) {
1641 dhb_page=(dhb >> 8) & ti->page_mask;
1642 dhb=dhb & ~(ti->page_mask << 8);
1643 dhb_len=0x4000-dhb; /* remaining size of this page */
1644 }
1645 dhbuf = ti->sram_virt + dhb;
1646 SET_PAGE(dhb_page);
1647 if (src_len > dhb_len) {
1648 memcpy_toio(dhbuf,&ti->current_skb->data[src_offset],
1649 dhb_len);
1650 src_len -= dhb_len;
1651 src_offset += dhb_len;
1652 dhb_base+=dhb_len;
1653 dhb=dhb_base;
1654 continue;
1655 }
1656 memcpy_toio(dhbuf, &ti->current_skb->data[src_offset], src_len);
1657 break;
1658 }
1659 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1660 ti->tr_stats.tx_bytes += ti->current_skb->len;
1661 dev_kfree_skb_irq(ti->current_skb);
1662 ti->current_skb = NULL;
1663 netif_wake_queue(dev);
1664 if (ti->readlog_pending)
1665 ibmtr_readlog(dev);
1666} /*tr_tx */
1667
1668/*****************************************************************************/
1669
1670
1671#define RECEIVE_BUFFER_OFST 6
1672#define LAN_HDR_LENGTH_OFST 8
1673#define DLC_HDR_LENGTH_OFST 9
1674
1675#define DSAP_OFST 0
1676#define SSAP_OFST 1
1677#define LLC_OFST 2
1678#define PROTID_OFST 3
1679#define ETHERTYPE_OFST 6
1680
1681static void tr_rx(struct net_device *dev)
1682{
1683 struct tok_info *ti = (struct tok_info *) dev->priv;
1684 __u32 rbuffer;
1685 void __iomem *rbuf, *rbufdata, *llc;
1686 __u8 rbuffer_page = 0;
1687 unsigned char *data;
1688 unsigned int rbuffer_len, lan_hdr_len, hdr_len, ip_len, length;
1689 unsigned char dlc_hdr_len;
1690 struct sk_buff *skb;
1691 unsigned int skb_size = 0;
1692 int IPv4_p = 0;
1693 unsigned int chksum = 0;
1694 struct iphdr *iph;
1695 struct arb_rec_req rarb;
1696
1697 SET_PAGE(ti->arb_page);
1698 memcpy_fromio(&rarb, ti->arb, sizeof(rarb));
1699 rbuffer = ntohs(rarb.rec_buf_addr) ;
1700 rbuf = map_address(ti, rbuffer, &rbuffer_page);
1701
1702 SET_PAGE(ti->asb_page);
1703
1704 if (readb(ti->asb + RETCODE_OFST) !=0xFF) DPRINTK("ASB not free !!!\n");
1705
1706 writeb(REC_DATA, ti->asb + COMMAND_OFST);
1707 writew(rarb.station_id, ti->asb + STATION_ID_OFST);
1708 writew(rarb.rec_buf_addr, ti->asb + RECEIVE_BUFFER_OFST);
1709
1710 lan_hdr_len = rarb.lan_hdr_len;
1711 if (lan_hdr_len > sizeof(struct trh_hdr)) {
1712 DPRINTK("Linux cannot handle greater than 18 bytes RIF\n");
1713 return;
1714 } /*BMS I added this above just to be very safe */
1715 dlc_hdr_len = readb(ti->arb + DLC_HDR_LENGTH_OFST);
1716 hdr_len = lan_hdr_len + sizeof(struct trllc) + sizeof(struct iphdr);
1717
1718 SET_PAGE(rbuffer_page);
1719 llc = rbuf + offsetof(struct rec_buf, data) + lan_hdr_len;
1720
1721#if TR_VERBOSE
1722 DPRINTK("offsetof data: %02X lan_hdr_len: %02X\n",
1723 (__u32) offsetof(struct rec_buf, data), (unsigned int) lan_hdr_len);
1724 DPRINTK("llc: %08X rec_buf_addr: %04X dev->mem_start: %lX\n",
1725 llc, ntohs(rarb.rec_buf_addr), dev->mem_start);
1726 DPRINTK("dsap: %02X, ssap: %02X, llc: %02X, protid: %02X%02X%02X, "
1727 "ethertype: %04X\n",
1728 (int) readb(llc + DSAP_OFST), (int) readb(llc + SSAP_OFST),
1729 (int) readb(llc + LLC_OFST), (int) readb(llc + PROTID_OFST),
1730 (int) readb(llc+PROTID_OFST+1),(int)readb(llc+PROTID_OFST + 2),
1731 (int) ntohs(readw(llc + ETHERTYPE_OFST)));
1732#endif
1733 if (readb(llc + offsetof(struct trllc, llc)) != UI_CMD) {
1734 SET_PAGE(ti->asb_page);
1735 writeb(DATA_LOST, ti->asb + RETCODE_OFST);
1736 ti->tr_stats.rx_dropped++;
1737 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1738 return;
1739 }
1740 length = ntohs(rarb.frame_len);
1741 if (readb(llc + DSAP_OFST) == EXTENDED_SAP &&
1742 readb(llc + SSAP_OFST) == EXTENDED_SAP &&
1743 length >= hdr_len) IPv4_p = 1;
1744#if TR_VERBOSE
1745#define SADDR_OFST 8
1746#define DADDR_OFST 2
1747
1748 if (!IPv4_p) {
1749
1750 void __iomem *trhhdr = rbuf + offsetof(struct rec_buf, data);
1751
1752 DPRINTK("Probably non-IP frame received.\n");
1753 DPRINTK("ssap: %02X dsap: %02X "
1754 "saddr: %02X:%02X:%02X:%02X:%02X:%02X "
1755 "daddr: %02X:%02X:%02X:%02X:%02X:%02X\n",
1756 readb(llc + SSAP_OFST), readb(llc + DSAP_OFST),
1757 readb(trhhdr+SADDR_OFST), readb(trhhdr+ SADDR_OFST+1),
1758 readb(trhhdr+SADDR_OFST+2), readb(trhhdr+SADDR_OFST+3),
1759 readb(trhhdr+SADDR_OFST+4), readb(trhhdr+SADDR_OFST+5),
1760 readb(trhhdr+DADDR_OFST), readb(trhhdr+DADDR_OFST + 1),
1761 readb(trhhdr+DADDR_OFST+2), readb(trhhdr+DADDR_OFST+3),
1762 readb(trhhdr+DADDR_OFST+4), readb(trhhdr+DADDR_OFST+5));
1763 }
1764#endif
1765
1766 /*BMS handle the case she comes in with few hops but leaves with many */
1767 skb_size=length-lan_hdr_len+sizeof(struct trh_hdr)+sizeof(struct trllc);
1768
1769 if (!(skb = dev_alloc_skb(skb_size))) {
1770 DPRINTK("out of memory. frame dropped.\n");
1771 ti->tr_stats.rx_dropped++;
1772 SET_PAGE(ti->asb_page);
1773 writeb(DATA_LOST, ti->asb + offsetof(struct asb_rec, ret_code));
1774 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1775 return;
1776 }
1777 /*BMS again, if she comes in with few but leaves with many */
1778 skb_reserve(skb, sizeof(struct trh_hdr) - lan_hdr_len);
1779 skb_put(skb, length);
1780 skb->dev = dev;
1781 data = skb->data;
1782 rbuffer_len = ntohs(readw(rbuf + offsetof(struct rec_buf, buf_len)));
1783 rbufdata = rbuf + offsetof(struct rec_buf, data);
1784
1785 if (IPv4_p) {
1786 /* Copy the headers without checksumming */
1787 memcpy_fromio(data, rbufdata, hdr_len);
1788
1789 /* Watch for padded packets and bogons */
1790 iph= (struct iphdr *)(data+ lan_hdr_len + sizeof(struct trllc));
1791 ip_len = ntohs(iph->tot_len) - sizeof(struct iphdr);
1792 length -= hdr_len;
1793 if ((ip_len <= length) && (ip_len > 7))
1794 length = ip_len;
1795 data += hdr_len;
1796 rbuffer_len -= hdr_len;
1797 rbufdata += hdr_len;
1798 }
1799 /* Copy the payload... */
1800#define BUFFER_POINTER_OFST 2
1801#define BUFFER_LENGTH_OFST 6
1802 for (;;) {
1803 if (ibmtr_debug_trace&TRC_INITV && length < rbuffer_len)
1804 DPRINTK("CURIOUS, length=%d < rbuffer_len=%d\n",
1805 length,rbuffer_len);
1806 if (IPv4_p)
1807 chksum=csum_partial_copy_nocheck((void*)rbufdata,
1808 data,length<rbuffer_len?length:rbuffer_len,chksum);
1809 else
1810 memcpy_fromio(data, rbufdata, rbuffer_len);
1811 rbuffer = ntohs(readw(rbuf+BUFFER_POINTER_OFST)) ;
1812 if (!rbuffer)
1813 break;
1814 rbuffer -= 2;
1815 length -= rbuffer_len;
1816 data += rbuffer_len;
1817 rbuf = map_address(ti, rbuffer, &rbuffer_page);
1818 SET_PAGE(rbuffer_page);
1819 rbuffer_len = ntohs(readw(rbuf + BUFFER_LENGTH_OFST));
1820 rbufdata = rbuf + offsetof(struct rec_buf, data);
1821 }
1822
1823 SET_PAGE(ti->asb_page);
1824 writeb(0, ti->asb + offsetof(struct asb_rec, ret_code));
1825
1826 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1827
1828 ti->tr_stats.rx_bytes += skb->len;
1829 ti->tr_stats.rx_packets++;
1830
1831 skb->protocol = tr_type_trans(skb, dev);
1832 if (IPv4_p) {
1833 skb->csum = chksum;
1834 skb->ip_summed = 1;
1835 }
1836 netif_rx(skb);
1837 dev->last_rx = jiffies;
1838} /*tr_rx */
1839
1840/*****************************************************************************/
1841
de70b4c8 1842static void ibmtr_reset_timer(struct timer_list *tmr, struct net_device *dev)
1da177e4
LT		 1843{
1844 tmr->expires = jiffies + TR_RETRY_INTERVAL;
1845 tmr->data = (unsigned long) dev;
1846 tmr->function = tok_rerun;
1847 init_timer(tmr);
1848 add_timer(tmr);
1849}
1850
1851/*****************************************************************************/
1852
1853void tok_rerun(unsigned long dev_addr){
1854
1855 struct net_device *dev = (struct net_device *)dev_addr;
1856 struct tok_info *ti = (struct tok_info *) dev->priv;
1857
1858 if ( ti->open_action == RESTART){
1859 ti->do_tok_int = FIRST_INT;
1860 outb(0, dev->base_addr + ADAPTRESETREL);
1861#ifdef ENABLE_PAGING
1862 if (ti->page_mask)
1863 writeb(SRPR_ENABLE_PAGING,
1864 ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1865#endif
1866
1867 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1868 } else
1869 tok_open_adapter(dev_addr);
1870}
1871
1872/*****************************************************************************/
1873
de70b4c8 1874static void ibmtr_readlog(struct net_device *dev)
1da177e4
LT		 1875{
1876 struct tok_info *ti;
1877
1878 ti = (struct tok_info *) dev->priv;
1879
1880 ti->readlog_pending = 0;
1881 SET_PAGE(ti->srb_page);
1882 writeb(DIR_READ_LOG, ti->srb);
1883 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1884 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1885
1886 netif_stop_queue(dev);
1887
1888}
1889
1890/*****************************************************************************/
1891
1892/* tok_get_stats(): Basically a scaffold routine which will return
1893 the address of the tr_statistics structure associated with
1894 this device -- the tr.... structure is an ethnet look-alike
1895 so at least for this iteration may suffice. */
1896
1897static struct net_device_stats *tok_get_stats(struct net_device *dev)
1898{
1899
1900 struct tok_info *toki;
1901 toki = (struct tok_info *) dev->priv;
1902 return (struct net_device_stats *) &toki->tr_stats;
1903}
1904
1905/*****************************************************************************/
1906
de70b4c8 1907static int ibmtr_change_mtu(struct net_device *dev, int mtu)
1da177e4
LT		 1908{
1909 struct tok_info *ti = (struct tok_info *) dev->priv;
1910
1911 if (ti->ring_speed == 16 && mtu > ti->maxmtu16)
1912 return -EINVAL;
1913 if (ti->ring_speed == 4 && mtu > ti->maxmtu4)
1914 return -EINVAL;
1915 dev->mtu = mtu;
1916 return 0;
1917}
1918
1919/*****************************************************************************/
1920#ifdef MODULE
1921
1922/* 3COM 3C619C supports 8 interrupts, 32 I/O ports */
1923static struct net_device *dev_ibmtr[IBMTR_MAX_ADAPTERS];
1924static int io[IBMTR_MAX_ADAPTERS] = { 0xa20, 0xa24 };
1925static int irq[IBMTR_MAX_ADAPTERS];
1926static int mem[IBMTR_MAX_ADAPTERS];
1927
1928MODULE_LICENSE("GPL");
1929
1930module_param_array(io, int, NULL, 0);
1931module_param_array(irq, int, NULL, 0);
1932module_param_array(mem, int, NULL, 0);
1933
1934static int __init ibmtr_init(void)
1935{
1936 int i;
1937 int count=0;
1938
1939 find_turbo_adapters(io);
1940
1941 for (i = 0; io[i] && (i < IBMTR_MAX_ADAPTERS); i++) {
1942 struct net_device *dev;
1943 irq[i] = 0;
1944 mem[i] = 0;
1945 dev = alloc_trdev(sizeof(struct tok_info));
1946 if (dev == NULL) {
1947 if (i == 0)
1948 return -ENOMEM;
1949 break;
1950 }
1951 dev->base_addr = io[i];
1952 dev->irq = irq[i];
1953 dev->mem_start = mem[i];
1954
1955 if (ibmtr_probe_card(dev)) {
1956 free_netdev(dev);
1957 continue;
1958 }
1959 dev_ibmtr[i] = dev;
1960 count++;
1961 }
1962 if (count) return 0;
1963 printk("ibmtr: register_netdev() returned non-zero.\n");
1964 return -EIO;
1965}
1966module_init(ibmtr_init);
1967
1968static void __exit ibmtr_cleanup(void)
1969{
1970 int i;
1971
1972 for (i = 0; i < IBMTR_MAX_ADAPTERS; i++){
1973 if (!dev_ibmtr[i])
1974 continue;
1975 unregister_netdev(dev_ibmtr[i]);
1976 ibmtr_cleanup_card(dev_ibmtr[i]);
1977 free_netdev(dev_ibmtr[i]);
1978 }
1979}
1980module_exit(ibmtr_cleanup);
1981#endif
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