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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / net / tokenring / ibmtr.c
blobb5c8c18f504608e5e884ac8f232986a8ff1056c9
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 compatibility 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 #include <linux/sched.h>
112
113 #ifdef PCMCIA /* required for ibmtr_cs.c to build */
114 #undef MODULE /* yes, really */
115 #undef ENABLE_PAGING
116 #else
117 #define ENABLE_PAGING 1
118 #endif
119
120 /* changes the output format of driver initialization */
121 #define TR_VERBOSE 0
122
123 /* some 95 OS send many non UI frame; this allow removing the warning */
124 #define TR_FILTERNONUI 1
125
126 #include <linux/interrupt.h>
127 #include <linux/ioport.h>
128 #include <linux/netdevice.h>
129 #include <linux/ip.h>
130 #include <linux/trdevice.h>
131 #include <linux/ibmtr.h>
132
133 #include <net/checksum.h>
134
135 #include <asm/io.h>
136
137 #define DPRINTK(format, args...) printk("%s: " format, dev->name , ## args)
138 #define DPRINTD(format, args...) DummyCall("%s: " format, dev->name , ## args)
139
140 /* version and credits */
141 #ifndef PCMCIA
142 static char version[] __devinitdata =
143 "\nibmtr.c: v1.3.57 8/ 7/94 Peter De Schrijver and Mark Swanson\n"
144 " v2.1.125 10/20/98 Paul Norton <pnorton@ieee.org>\n"
145 " v2.2.0 12/30/98 Joel Sloan <jjs@c-me.com>\n"
146 " v2.2.1 02/08/00 Mike Sullivan <sullivam@us.ibm.com>\n"
147 " v2.2.2 07/27/00 Burt Silverman <burts@us.ibm.com>\n"
148 " v2.4.0 03/01/01 Mike Sullivan <sullivan@us.ibm.com>\n";
149 #endif
150
151 /* this allows displaying full adapter information */
152
153 static char *channel_def[] __devinitdata = { "ISA", "MCA", "ISA P&P" };
154
155 static char pcchannelid[] __devinitdata = {
156 0x05, 0x00, 0x04, 0x09,
157 0x04, 0x03, 0x04, 0x0f,
158 0x03, 0x06, 0x03, 0x01,
159 0x03, 0x01, 0x03, 0x00,
160 0x03, 0x09, 0x03, 0x09,
161 0x03, 0x00, 0x02, 0x00
162 };
163
164 static char mcchannelid[] __devinitdata = {
165 0x04, 0x0d, 0x04, 0x01,
166 0x05, 0x02, 0x05, 0x03,
167 0x03, 0x06, 0x03, 0x03,
168 0x05, 0x08, 0x03, 0x04,
169 0x03, 0x05, 0x03, 0x01,
170 0x03, 0x08, 0x02, 0x00
171 };
172
173 static char __devinit *adapter_def(char type)
174 {
175 switch (type) {
176 case 0xF: return "PC Adapter | PC Adapter II | Adapter/A";
177 case 0xE: return "16/4 Adapter | 16/4 Adapter/A (long)";
178 case 0xD: return "16/4 Adapter/A (short) | 16/4 ISA-16 Adapter";
179 case 0xC: return "Auto 16/4 Adapter";
180 default: return "adapter (unknown type)";
181 }
182 };
183
184 #define TRC_INIT 0x01 /* Trace initialization & PROBEs */
185 #define TRC_INITV 0x02 /* verbose init trace points */
186 static unsigned char ibmtr_debug_trace = 0;
187
188 static int ibmtr_probe1(struct net_device *dev, int ioaddr);
189 static unsigned char get_sram_size(struct tok_info *adapt_info);
190 static int trdev_init(struct net_device *dev);
191 static int tok_open(struct net_device *dev);
192 static int tok_init_card(struct net_device *dev);
193 static void tok_open_adapter(unsigned long dev_addr);
194 static void open_sap(unsigned char type, struct net_device *dev);
195 static void tok_set_multicast_list(struct net_device *dev);
196 static netdev_tx_t tok_send_packet(struct sk_buff *skb,
197 struct net_device *dev);
198 static int tok_close(struct net_device *dev);
199 static irqreturn_t tok_interrupt(int irq, void *dev_id);
200 static void initial_tok_int(struct net_device *dev);
201 static void tr_tx(struct net_device *dev);
202 static void tr_rx(struct net_device *dev);
203 static void ibmtr_reset_timer(struct timer_list*tmr,struct net_device *dev);
204 static void tok_rerun(unsigned long dev_addr);
205 static void ibmtr_readlog(struct net_device *dev);
206 static int ibmtr_change_mtu(struct net_device *dev, int mtu);
207 static void find_turbo_adapters(int *iolist);
208
209 static int ibmtr_portlist[IBMTR_MAX_ADAPTERS+1] __devinitdata = {
210 0xa20, 0xa24, 0, 0, 0
211 };
212 static int __devinitdata turbo_io[IBMTR_MAX_ADAPTERS] = {0};
213 static int __devinitdata turbo_irq[IBMTR_MAX_ADAPTERS] = {0};
214 static int __devinitdata turbo_searched = 0;
215
216 #ifndef PCMCIA
217 static __u32 ibmtr_mem_base __devinitdata = 0xd0000;
218 #endif
219
220 static void __devinit PrtChanID(char *pcid, short stride)
221 {
222 short i, j;
223 for (i = 0, j = 0; i < 24; i++, j += stride)
224 printk("%1x", ((int) pcid[j]) & 0x0f);
225 printk("\n");
226 }
227
228 static void __devinit HWPrtChanID(void __iomem *pcid, short stride)
229 {
230 short i, j;
231 for (i = 0, j = 0; i < 24; i++, j += stride)
232 printk("%1x", ((int) readb(pcid + j)) & 0x0f);
233 printk("\n");
234 }
235
236 /* We have to ioremap every checked address, because isa_readb is
237 * going away.
238 */
239
240 static void __devinit find_turbo_adapters(int *iolist)
241 {
242 int ram_addr;
243 int index=0;
244 void __iomem *chanid;
245 int found_turbo=0;
246 unsigned char *tchanid, ctemp;
247 int i, j;
248 unsigned long jif;
249 void __iomem *ram_mapped ;
250
251 if (turbo_searched == 1) return;
252 turbo_searched=1;
253 for (ram_addr=0xC0000; ram_addr < 0xE0000; ram_addr+=0x2000) {
254
255 __u32 intf_tbl=0;
256
257 found_turbo=1;
258 ram_mapped = ioremap((u32)ram_addr,0x1fff) ;
259 if (ram_mapped==NULL)
260 continue ;
261 chanid=(CHANNEL_ID + ram_mapped);
262 tchanid=pcchannelid;
263 ctemp=readb(chanid) & 0x0f;
264 if (ctemp != *tchanid) continue;
265 for (i=2,j=1; i<=46; i=i+2,j++) {
266 if ((readb(chanid+i) & 0x0f) != tchanid[j]){
267 found_turbo=0;
268 break;
269 }
270 }
271 if (!found_turbo) continue;
272
273 writeb(0x90, ram_mapped+0x1E01);
274 for(i=2; i<0x0f; i++) {
275 writeb(0x00, ram_mapped+0x1E01+i);
276 }
277 writeb(0x00, ram_mapped+0x1E01);
278 for(jif=jiffies+TR_BUSY_INTERVAL; time_before_eq(jiffies,jif););
279 intf_tbl=ntohs(readw(ram_mapped+ACA_OFFSET+ACA_RW+WRBR_EVEN));
280 if (intf_tbl) {
281 #if IBMTR_DEBUG_MESSAGES
282 printk("ibmtr::find_turbo_adapters, Turbo found at "
283 "ram_addr %x\n",ram_addr);
284 printk("ibmtr::find_turbo_adapters, interface_table ");
285 for(i=0; i<6; i++) {
286 printk("%x:",readb(ram_addr+intf_tbl+i));
287 }
288 printk("\n");
289 #endif
290 turbo_io[index]=ntohs(readw(ram_mapped+intf_tbl+4));
291 turbo_irq[index]=readb(ram_mapped+intf_tbl+3);
292 outb(0, turbo_io[index] + ADAPTRESET);
293 for(jif=jiffies+TR_RST_TIME;time_before_eq(jiffies,jif););
294 outb(0, turbo_io[index] + ADAPTRESETREL);
295 index++;
296 continue;
297 }
298 #if IBMTR_DEBUG_MESSAGES
299 printk("ibmtr::find_turbo_adapters, ibmtr card found at"
300 " %x but not a Turbo model\n",ram_addr);
301 #endif
302 iounmap(ram_mapped) ;
303 } /* for */
304 for(i=0; i<IBMTR_MAX_ADAPTERS; i++) {
305 if(!turbo_io[i]) break;
306 for (j=0; j<IBMTR_MAX_ADAPTERS; j++) {
307 if ( iolist[j] && iolist[j] != turbo_io[i]) continue;
308 iolist[j]=turbo_io[i];
309 break;
310 }
311 }
312 }
313
314 static void ibmtr_cleanup_card(struct net_device *dev)
315 {
316 if (dev->base_addr) {
317 outb(0,dev->base_addr+ADAPTRESET);
318
319 schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */
320
321 outb(0,dev->base_addr+ADAPTRESETREL);
322 }
323
324 #ifndef PCMCIA
325 free_irq(dev->irq, dev);
326 release_region(dev->base_addr, IBMTR_IO_EXTENT);
327
328 {
329 struct tok_info *ti = netdev_priv(dev);
330 iounmap(ti->mmio);
331 iounmap(ti->sram_virt);
332 }
333 #endif
334 }
335
336 /****************************************************************************
337 * ibmtr_probe(): Routine specified in the network device structure
338 * to probe for an IBM Token Ring Adapter. Routine outline:
339 * I. Interrogate hardware to determine if an adapter exists
340 * and what the speeds and feeds are
341 * II. Setup data structures to control execution based upon
342 * adapter characteristics.
343 *
344 * We expect ibmtr_probe to be called once for each device entry
345 * which references it.
346 ****************************************************************************/
347
348 static int __devinit ibmtr_probe(struct net_device *dev)
349 {
350 int i;
351 int base_addr = dev->base_addr;
352
353 if (base_addr && base_addr <= 0x1ff) /* Don't probe at all. */
354 return -ENXIO;
355 if (base_addr > 0x1ff) { /* Check a single specified location. */
356 if (!ibmtr_probe1(dev, base_addr)) return 0;
357 return -ENODEV;
358 }
359 find_turbo_adapters(ibmtr_portlist);
360 for (i = 0; ibmtr_portlist[i]; i++) {
361 int ioaddr = ibmtr_portlist[i];
362
363 if (!ibmtr_probe1(dev, ioaddr)) return 0;
364 }
365 return -ENODEV;
366 }
367
368 int __devinit ibmtr_probe_card(struct net_device *dev)
369 {
370 int err = ibmtr_probe(dev);
371 if (!err) {
372 err = register_netdev(dev);
373 if (err)
374 ibmtr_cleanup_card(dev);
375 }
376 return err;
377 }
378
379 /*****************************************************************************/
380
381 static int __devinit ibmtr_probe1(struct net_device *dev, int PIOaddr)
382 {
383
384 unsigned char segment, intr=0, irq=0, i, j, cardpresent=NOTOK, temp=0;
385 void __iomem * t_mmio = NULL;
386 struct tok_info *ti = netdev_priv(dev);
387 void __iomem *cd_chanid;
388 unsigned char *tchanid, ctemp;
389 #ifndef PCMCIA
390 unsigned char t_irq=0;
391 unsigned long timeout;
392 static int version_printed;
393 #endif
394
395 /* Query the adapter PIO base port which will return
396 * indication of where MMIO was placed. We also have a
397 * coded interrupt number.
398 */
399 segment = inb(PIOaddr);
400 if (segment < 0x40 || segment > 0xe0) {
401 /* Out of range values so we'll assume non-existent IO device
402 * but this is not necessarily a problem, esp if a turbo
403 * adapter is being used. */
404 #if IBMTR_DEBUG_MESSAGES
405 DPRINTK("ibmtr_probe1(): unhappy that inb(0x%X) == 0x%X, "
406 "Hardware Problem?\n",PIOaddr,segment);
407 #endif
408 return -ENODEV;
409 }
410 /*
411 * Compute the linear base address of the MMIO area
412 * as LINUX doesn't care about segments
413 */
414 t_mmio = ioremap(((__u32) (segment & 0xfc) << 11) + 0x80000,2048);
415 if (!t_mmio) {
416 DPRINTK("Cannot remap mmiobase memory area") ;
417 return -ENODEV ;
418 }
419 intr = segment & 0x03; /* low bits is coded interrupt # */
420 if (ibmtr_debug_trace & TRC_INIT)
421 DPRINTK("PIOaddr: %4hx seg/intr: %2x mmio base: %p intr: %d\n"
422 , PIOaddr, (int) segment, t_mmio, (int) intr);
423
424 /*
425 * Now we will compare expected 'channelid' strings with
426 * what we is there to learn of ISA/MCA or not TR card
427 */
428 #ifdef PCMCIA
429 iounmap(t_mmio);
430 t_mmio = ti->mmio; /*BMS to get virtual address */
431 irq = ti->irq; /*BMS to display the irq! */
432 #endif
433 cd_chanid = (CHANNEL_ID + t_mmio); /* for efficiency */
434 tchanid = pcchannelid;
435 cardpresent = TR_ISA; /* try ISA */
436
437 /* Suboptimize knowing first byte different */
438 ctemp = readb(cd_chanid) & 0x0f;
439 if (ctemp != *tchanid) { /* NOT ISA card, try MCA */
440 tchanid = mcchannelid;
441 cardpresent = TR_MCA;
442 if (ctemp != *tchanid) /* Neither ISA nor MCA */
443 cardpresent = NOTOK;
444 }
445 if (cardpresent != NOTOK) {
446 /* Know presumed type, try rest of ID */
447 for (i = 2, j = 1; i <= 46; i = i + 2, j++) {
448 if( (readb(cd_chanid+i)&0x0f) == tchanid[j]) continue;
449 /* match failed, not TR card */
450 cardpresent = NOTOK;
451 break;
452 }
453 }
454 /*
455 * If we have an ISA board check for the ISA P&P version,
456 * as it has different IRQ settings
457 */
458 if (cardpresent == TR_ISA && (readb(AIPFID + t_mmio) == 0x0e))
459 cardpresent = TR_ISAPNP;
460 if (cardpresent == NOTOK) { /* "channel_id" did not match, report */
461 if (!(ibmtr_debug_trace & TRC_INIT)) {
462 #ifndef PCMCIA
463 iounmap(t_mmio);
464 #endif
465 return -ENODEV;
466 }
467 DPRINTK( "Channel ID string not found for PIOaddr: %4hx\n",
468 PIOaddr);
469 DPRINTK("Expected for ISA: ");
470 PrtChanID(pcchannelid, 1);
471 DPRINTK(" found: ");
472 /* BMS Note that this can be misleading, when hardware is flaky, because you
473 are reading it a second time here. So with my flaky hardware, I'll see my-
474 self in this block, with the HW ID matching the ISA ID exactly! */
475 HWPrtChanID(cd_chanid, 2);
476 DPRINTK("Expected for MCA: ");
477 PrtChanID(mcchannelid, 1);
478 }
479 /* Now, setup some of the pl0 buffers for this driver.. */
480 /* If called from PCMCIA, it is already set up, so no need to
481 waste the memory, just use the existing structure */
482 #ifndef PCMCIA
483 ti->mmio = t_mmio;
484 for (i = 0; i < IBMTR_MAX_ADAPTERS; i++) {
485 if (turbo_io[i] != PIOaddr)
486 continue;
487 #if IBMTR_DEBUG_MESSAGES
488 printk("ibmtr::tr_probe1, setting PIOaddr %x to Turbo\n",
489 PIOaddr);
490 #endif
491 ti->turbo = 1;
492 t_irq = turbo_irq[i];
493 }
494 #endif /* !PCMCIA */
495 ti->readlog_pending = 0;
496 init_waitqueue_head(&ti->wait_for_reset);
497
498 /* if PCMCIA, the card can be recognized as either TR_ISA or TR_ISAPNP
499 * depending which card is inserted. */
500
501 #ifndef PCMCIA
502 switch (cardpresent) {
503 case TR_ISA:
504 if (intr == 0) irq = 9; /* irq2 really is irq9 */
505 if (intr == 1) irq = 3;
506 if (intr == 2) irq = 6;
507 if (intr == 3) irq = 7;
508 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
509 break;
510 case TR_MCA:
511 if (intr == 0) irq = 9;
512 if (intr == 1) irq = 3;
513 if (intr == 2) irq = 10;
514 if (intr == 3) irq = 11;
515 ti->global_int_enable = 0;
516 ti->adapter_int_enable = 0;
517 ti->sram_phys=(__u32)(inb(PIOaddr+ADAPTRESETREL) & 0xfe) << 12;
518 break;
519 case TR_ISAPNP:
520 if (!t_irq) {
521 if (intr == 0) irq = 9;
522 if (intr == 1) irq = 3;
523 if (intr == 2) irq = 10;
524 if (intr == 3) irq = 11;
525 } else
526 irq=t_irq;
527 timeout = jiffies + TR_SPIN_INTERVAL;
528 while (!readb(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN)){
529 if (!time_after(jiffies, timeout)) continue;
530 DPRINTK( "Hardware timeout during initialization.\n");
531 iounmap(t_mmio);
532 return -ENODEV;
533 }
534 ti->sram_phys =
535 ((__u32)readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_EVEN)<<12);
536 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
537 break;
538 } /*end switch (cardpresent) */
539 #endif /*not PCMCIA */
540
541 if (ibmtr_debug_trace & TRC_INIT) { /* just report int */
542 DPRINTK("irq=%d", irq);
543 printk(", sram_phys=0x%x", ti->sram_phys);
544 if(ibmtr_debug_trace&TRC_INITV){ /* full chat in verbose only */
545 DPRINTK(", ti->mmio=%p", ti->mmio);
546 printk(", segment=%02X", segment);
547 }
548 printk(".\n");
549 }
550
551 /* Get hw address of token ring card */
552 j = 0;
553 for (i = 0; i < 0x18; i = i + 2) {
554 /* technical reference states to do this */
555 temp = readb(ti->mmio + AIP + i) & 0x0f;
556 ti->hw_address[j] = temp;
557 if (j & 1)
558 dev->dev_addr[(j / 2)] =
559 ti->hw_address[j]+ (ti->hw_address[j - 1] << 4);
560 ++j;
561 }
562 /* get Adapter type: 'F' = Adapter/A, 'E' = 16/4 Adapter II,... */
563 ti->adapter_type = readb(ti->mmio + AIPADAPTYPE);
564
565 /* get Data Rate: F=4Mb, E=16Mb, D=4Mb & 16Mb ?? */
566 ti->data_rate = readb(ti->mmio + AIPDATARATE);
567
568 /* Get Early Token Release support?: F=no, E=4Mb, D=16Mb, C=4&16Mb */
569 ti->token_release = readb(ti->mmio + AIPEARLYTOKEN);
570
571 /* How much shared RAM is on adapter ? */
572 if (ti->turbo) {
573 ti->avail_shared_ram=127;
574 } else {
575 ti->avail_shared_ram = get_sram_size(ti);/*in 512 byte units */
576 }
577 /* We need to set or do a bunch of work here based on previous results*/
578 /* Support paging? What sizes?: F=no, E=16k, D=32k, C=16 & 32k */
579 ti->shared_ram_paging = readb(ti->mmio + AIPSHRAMPAGE);
580
581 /* Available DHB 4Mb size: F=2048, E=4096, D=4464 */
582 switch (readb(ti->mmio + AIP4MBDHB)) {
583 case 0xe: ti->dhb_size4mb = 4096; break;
584 case 0xd: ti->dhb_size4mb = 4464; break;
585 default: ti->dhb_size4mb = 2048; break;
586 }
587
588 /* Available DHB 16Mb size: F=2048, E=4096, D=8192, C=16384, B=17960 */
589 switch (readb(ti->mmio + AIP16MBDHB)) {
590 case 0xe: ti->dhb_size16mb = 4096; break;
591 case 0xd: ti->dhb_size16mb = 8192; break;
592 case 0xc: ti->dhb_size16mb = 16384; break;
593 case 0xb: ti->dhb_size16mb = 17960; break;
594 default: ti->dhb_size16mb = 2048; break;
595 }
596
597 /* We must figure out how much shared memory space this adapter
598 * will occupy so that if there are two adapters we can fit both
599 * in. Given a choice, we will limit this adapter to 32K. The
600 * maximum space will will use for two adapters is 64K so if the
601 * adapter we are working on demands 64K (it also doesn't support
602 * paging), then only one adapter can be supported.
603 */
604
605 /*
606 * determine how much of total RAM is mapped into PC space
607 */
608 ti->mapped_ram_size= /*sixteen to onehundredtwentyeight 512byte blocks*/
609 1<< ((readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03) + 4);
610 ti->page_mask = 0;
611 if (ti->turbo) ti->page_mask=0xf0;
612 else if (ti->shared_ram_paging == 0xf); /* No paging in adapter */
613 else {
614 #ifdef ENABLE_PAGING
615 unsigned char pg_size = 0;
616 /* BMS: page size: PCMCIA, use configuration register;
617 ISAPNP, use LANAIDC config tool from www.ibm.com */
618 switch (ti->shared_ram_paging) {
619 case 0xf:
620 break;
621 case 0xe:
622 ti->page_mask = (ti->mapped_ram_size == 32) ? 0xc0 : 0;
623 pg_size = 32; /* 16KB page size */
624 break;
625 case 0xd:
626 ti->page_mask = (ti->mapped_ram_size == 64) ? 0x80 : 0;
627 pg_size = 64; /* 32KB page size */
628 break;
629 case 0xc:
630 switch (ti->mapped_ram_size) {
631 case 32:
632 ti->page_mask = 0xc0;
633 pg_size = 32;
634 break;
635 case 64:
636 ti->page_mask = 0x80;
637 pg_size = 64;
638 break;
639 }
640 break;
641 default:
642 DPRINTK("Unknown shared ram paging info %01X\n",
643 ti->shared_ram_paging);
644 iounmap(t_mmio);
645 return -ENODEV;
646 break;
647 } /*end switch shared_ram_paging */
648
649 if (ibmtr_debug_trace & TRC_INIT)
650 DPRINTK("Shared RAM paging code: %02X, "
651 "mapped RAM size: %dK, shared RAM size: %dK, "
652 "page mask: %02X\n:",
653 ti->shared_ram_paging, ti->mapped_ram_size / 2,
654 ti->avail_shared_ram / 2, ti->page_mask);
655 #endif /*ENABLE_PAGING */
656 }
657
658 #ifndef PCMCIA
659 /* finish figuring the shared RAM address */
660 if (cardpresent == TR_ISA) {
661 static const __u32 ram_bndry_mask[] = {
662 0xffffe000, 0xffffc000, 0xffff8000, 0xffff0000
663 };
664 __u32 new_base, rrr_32, chk_base, rbm;
665
666 rrr_32=readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03;
667 rbm = ram_bndry_mask[rrr_32];
668 new_base = (ibmtr_mem_base + (~rbm)) & rbm;/* up to boundary */
669 chk_base = new_base + (ti->mapped_ram_size << 9);
670 if (chk_base > (ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE)) {
671 DPRINTK("Shared RAM for this adapter (%05x) exceeds "
672 "driver limit (%05x), adapter not started.\n",
673 chk_base, ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE);
674 iounmap(t_mmio);
675 return -ENODEV;
676 } else { /* seems cool, record what we have figured out */
677 ti->sram_base = new_base >> 12;
678 ibmtr_mem_base = chk_base;
679 }
680 }
681 else ti->sram_base = ti->sram_phys >> 12;
682
683 /* The PCMCIA has already got the interrupt line and the io port,
684 so no chance of anybody else getting it - MLP */
685 if (request_irq(dev->irq = irq, tok_interrupt, 0, "ibmtr", dev) != 0) {
686 DPRINTK("Could not grab irq %d. Halting Token Ring driver.\n",
687 irq);
688 iounmap(t_mmio);
689 return -ENODEV;
690 }
691 /*?? Now, allocate some of the PIO PORTs for this driver.. */
692 /* record PIOaddr range as busy */
693 if (!request_region(PIOaddr, IBMTR_IO_EXTENT, "ibmtr")) {
694 DPRINTK("Could not grab PIO range. Halting driver.\n");
695 free_irq(dev->irq, dev);
696 iounmap(t_mmio);
697 return -EBUSY;
698 }
699
700 if (!version_printed++) {
701 printk(version);
702 }
703 #endif /* !PCMCIA */
704 DPRINTK("%s %s found\n",
705 channel_def[cardpresent - 1], adapter_def(ti->adapter_type));
706 DPRINTK("using irq %d, PIOaddr %hx, %dK shared RAM.\n",
707 irq, PIOaddr, ti->mapped_ram_size / 2);
708 DPRINTK("Hardware address : %pM\n", dev->dev_addr);
709 if (ti->page_mask)
710 DPRINTK("Shared RAM paging enabled. "
711 "Page size: %uK Shared Ram size %dK\n",
712 ((ti->page_mask^0xff)+1) >>2, ti->avail_shared_ram / 2);
713 else
714 DPRINTK("Shared RAM paging disabled. ti->page_mask %x\n",
715 ti->page_mask);
716
717 /* Calculate the maximum DHB we can use */
718 /* two cases where avail_shared_ram doesn't equal mapped_ram_size:
719 1. avail_shared_ram is 127 but mapped_ram_size is 128 (typical)
720 2. user has configured adapter for less than avail_shared_ram
721 but is not using paging (she should use paging, I believe)
722 */
723 if (!ti->page_mask) {
724 ti->avail_shared_ram=
725 min(ti->mapped_ram_size,ti->avail_shared_ram);
726 }
727
728 switch (ti->avail_shared_ram) {
729 case 16: /* 8KB shared RAM */
730 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)2048);
731 ti->rbuf_len4 = 1032;
732 ti->rbuf_cnt4=2;
733 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)2048);
734 ti->rbuf_len16 = 1032;
735 ti->rbuf_cnt16=2;
736 break;
737 case 32: /* 16KB shared RAM */
738 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
739 ti->rbuf_len4 = 1032;
740 ti->rbuf_cnt4=4;
741 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)4096);
742 ti->rbuf_len16 = 1032; /*1024 usable */
743 ti->rbuf_cnt16=4;
744 break;
745 case 64: /* 32KB shared RAM */
746 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
747 ti->rbuf_len4 = 1032;
748 ti->rbuf_cnt4=6;
749 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)10240);
750 ti->rbuf_len16 = 1032;
751 ti->rbuf_cnt16=6;
752 break;
753 case 127: /* 63.5KB 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)16384);
758 ti->rbuf_len16 = 1032;
759 ti->rbuf_cnt16=16;
760 break;
761 case 128: /* 64KB 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)17960);
766 ti->rbuf_len16 = 1032;
767 ti->rbuf_cnt16=16;
768 break;
769 default:
770 ti->dhb_size4mb = 2048;
771 ti->rbuf_len4 = 1032;
772 ti->rbuf_cnt4=2;
773 ti->dhb_size16mb = 2048;
774 ti->rbuf_len16 = 1032;
775 ti->rbuf_cnt16=2;
776 break;
777 }
778 /* this formula is not smart enough for the paging case
779 ti->rbuf_cnt<x> = (ti->avail_shared_ram * BLOCKSZ - ADAPT_PRIVATE -
780 ARBLENGTH - SSBLENGTH - DLC_MAX_SAP * SAPLENGTH -
781 DLC_MAX_STA * STALENGTH - ti->dhb_size<x>mb * NUM_DHB -
782 SRBLENGTH - ASBLENGTH) / ti->rbuf_len<x>;
783 */
784 ti->maxmtu16 = (ti->rbuf_len16 - 8) * ti->rbuf_cnt16 - TR_HLEN;
785 ti->maxmtu4 = (ti->rbuf_len4 - 8) * ti->rbuf_cnt4 - TR_HLEN;
786 /*BMS assuming 18 bytes of Routing Information (usually works) */
787 DPRINTK("Maximum Receive Internet Protocol MTU 16Mbps: %d, 4Mbps: %d\n",
788 ti->maxmtu16, ti->maxmtu4);
789
790 dev->base_addr = PIOaddr; /* set the value for device */
791 dev->mem_start = ti->sram_base << 12;
792 dev->mem_end = dev->mem_start + (ti->mapped_ram_size << 9) - 1;
793 trdev_init(dev);
794 return 0; /* Return 0 to indicate we have found a Token Ring card. */
795 } /*ibmtr_probe1() */
796
797 /*****************************************************************************/
798
799 /* query the adapter for the size of shared RAM */
800 /* the function returns the RAM size in units of 512 bytes */
801
802 static unsigned char __devinit get_sram_size(struct tok_info *adapt_info)
803 {
804 unsigned char avail_sram_code;
805 static unsigned char size_code[] = { 0, 16, 32, 64, 127, 128 };
806 /* Adapter gives
807 'F' -- use RRR bits 3,2
808 'E' -- 8kb 'D' -- 16kb
809 'C' -- 32kb 'A' -- 64KB
810 'B' - 64KB less 512 bytes at top
811 (WARNING ... must zero top bytes in INIT */
812
813 avail_sram_code = 0xf - readb(adapt_info->mmio + AIPAVAILSHRAM);
814 if (avail_sram_code) return size_code[avail_sram_code];
815 else /* for code 'F', must compute size from RRR(3,2) bits */
816 return 1 <<
817 ((readb(adapt_info->mmio+ACA_OFFSET+ACA_RW+RRR_ODD)>>2&3)+4);
818 }
819
820 /*****************************************************************************/
821
822 static const struct net_device_ops trdev_netdev_ops = {
823 .ndo_open = tok_open,
824 .ndo_stop = tok_close,
825 .ndo_start_xmit = tok_send_packet,
826 .ndo_set_rx_mode = tok_set_multicast_list,
827 .ndo_change_mtu = ibmtr_change_mtu,
828 };
829
830 static int __devinit trdev_init(struct net_device *dev)
831 {
832 struct tok_info *ti = netdev_priv(dev);
833
834 SET_PAGE(ti->srb_page);
835 ti->open_failure = NO ;
836 dev->netdev_ops = &trdev_netdev_ops;
837
838 return 0;
839 }
840
841 /*****************************************************************************/
842
843 static int tok_init_card(struct net_device *dev)
844 {
845 struct tok_info *ti;
846 short PIOaddr;
847 unsigned long i;
848
849 PIOaddr = dev->base_addr;
850 ti = netdev_priv(dev);
851 /* Special processing for first interrupt after reset */
852 ti->do_tok_int = FIRST_INT;
853 /* Reset adapter */
854 writeb(~INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
855 outb(0, PIOaddr + ADAPTRESET);
856
857 schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */
858
859 outb(0, PIOaddr + ADAPTRESETREL);
860 #ifdef ENABLE_PAGING
861 if (ti->page_mask)
862 writeb(SRPR_ENABLE_PAGING,ti->mmio+ACA_OFFSET+ACA_RW+SRPR_EVEN);
863 #endif
864 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
865 i = sleep_on_timeout(&ti->wait_for_reset, 4 * HZ);
866 return i? 0 : -EAGAIN;
867 }
868
869 /*****************************************************************************/
870 static int tok_open(struct net_device *dev)
871 {
872 struct tok_info *ti = netdev_priv(dev);
873 int i;
874
875 /*the case we were left in a failure state during a previous open */
876 if (ti->open_failure == YES) {
877 DPRINTK("Last time you were disconnected, how about now?\n");
878 printk("You can't insert with an ICS connector half-cocked.\n");
879 }
880
881 ti->open_status = CLOSED; /* CLOSED or OPEN */
882 ti->sap_status = CLOSED; /* CLOSED or OPEN */
883 ti->open_failure = NO; /* NO or YES */
884 ti->open_mode = MANUAL; /* MANUAL or AUTOMATIC */
885
886 ti->sram_phys &= ~1; /* to reverse what we do in tok_close */
887 /* init the spinlock */
888 spin_lock_init(&ti->lock);
889 init_timer(&ti->tr_timer);
890
891 i = tok_init_card(dev);
892 if (i) return i;
893
894 while (1){
895 tok_open_adapter((unsigned long) dev);
896 i= interruptible_sleep_on_timeout(&ti->wait_for_reset, 25 * HZ);
897 /* sig catch: estimate opening adapter takes more than .5 sec*/
898 if (i>(245*HZ)/10) break; /* fancier than if (i==25*HZ) */
899 if (i==0) break;
900 if (ti->open_status == OPEN && ti->sap_status==OPEN) {
901 netif_start_queue(dev);
902 DPRINTK("Adapter is up and running\n");
903 return 0;
904 }
905 i=schedule_timeout_interruptible(TR_RETRY_INTERVAL);
906 /* wait 30 seconds */
907 if(i!=0) break; /*prob. a signal, like the i>24*HZ case above */
908 }
909 outb(0, dev->base_addr + ADAPTRESET);/* kill pending interrupts*/
910 DPRINTK("TERMINATED via signal\n"); /*BMS useful */
911 return -EAGAIN;
912 }
913
914 /*****************************************************************************/
915
916 #define COMMAND_OFST 0
917 #define OPEN_OPTIONS_OFST 8
918 #define NUM_RCV_BUF_OFST 24
919 #define RCV_BUF_LEN_OFST 26
920 #define DHB_LENGTH_OFST 28
921 #define NUM_DHB_OFST 30
922 #define DLC_MAX_SAP_OFST 32
923 #define DLC_MAX_STA_OFST 33
924
925 static void tok_open_adapter(unsigned long dev_addr)
926 {
927 struct net_device *dev = (struct net_device *) dev_addr;
928 struct tok_info *ti;
929 int i;
930
931 ti = netdev_priv(dev);
932 SET_PAGE(ti->init_srb_page);
933 writeb(~SRB_RESP_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD);
934 for (i = 0; i < sizeof(struct dir_open_adapter); i++)
935 writeb(0, ti->init_srb + i);
936 writeb(DIR_OPEN_ADAPTER, ti->init_srb + COMMAND_OFST);
937 writew(htons(OPEN_PASS_BCON_MAC), ti->init_srb + OPEN_OPTIONS_OFST);
938 if (ti->ring_speed == 16) {
939 writew(htons(ti->dhb_size16mb), ti->init_srb + DHB_LENGTH_OFST);
940 writew(htons(ti->rbuf_cnt16), ti->init_srb + NUM_RCV_BUF_OFST);
941 writew(htons(ti->rbuf_len16), ti->init_srb + RCV_BUF_LEN_OFST);
942 } else {
943 writew(htons(ti->dhb_size4mb), ti->init_srb + DHB_LENGTH_OFST);
944 writew(htons(ti->rbuf_cnt4), ti->init_srb + NUM_RCV_BUF_OFST);
945 writew(htons(ti->rbuf_len4), ti->init_srb + RCV_BUF_LEN_OFST);
946 }
947 writeb(NUM_DHB, /* always 2 */ ti->init_srb + NUM_DHB_OFST);
948 writeb(DLC_MAX_SAP, ti->init_srb + DLC_MAX_SAP_OFST);
949 writeb(DLC_MAX_STA, ti->init_srb + DLC_MAX_STA_OFST);
950 ti->srb = ti->init_srb; /* We use this one in the interrupt handler */
951 ti->srb_page = ti->init_srb_page;
952 DPRINTK("Opening adapter: Xmit bfrs: %d X %d, Rcv bfrs: %d X %d\n",
953 readb(ti->init_srb + NUM_DHB_OFST),
954 ntohs(readw(ti->init_srb + DHB_LENGTH_OFST)),
955 ntohs(readw(ti->init_srb + NUM_RCV_BUF_OFST)),
956 ntohs(readw(ti->init_srb + RCV_BUF_LEN_OFST)));
957 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
958 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
959 }
960
961 /*****************************************************************************/
962
963 static void open_sap(unsigned char type, struct net_device *dev)
964 {
965 int i;
966 struct tok_info *ti = netdev_priv(dev);
967
968 SET_PAGE(ti->srb_page);
969 for (i = 0; i < sizeof(struct dlc_open_sap); i++)
970 writeb(0, ti->srb + i);
971
972 #define MAX_I_FIELD_OFST 14
973 #define SAP_VALUE_OFST 16
974 #define SAP_OPTIONS_OFST 17
975 #define STATION_COUNT_OFST 18
976
977 writeb(DLC_OPEN_SAP, ti->srb + COMMAND_OFST);
978 writew(htons(MAX_I_FIELD), ti->srb + MAX_I_FIELD_OFST);
979 writeb(SAP_OPEN_IND_SAP | SAP_OPEN_PRIORITY, ti->srb+ SAP_OPTIONS_OFST);
980 writeb(SAP_OPEN_STATION_CNT, ti->srb + STATION_COUNT_OFST);
981 writeb(type, ti->srb + SAP_VALUE_OFST);
982 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
983 }
984
985
986 /*****************************************************************************/
987
988 static void tok_set_multicast_list(struct net_device *dev)
989 {
990 struct tok_info *ti = netdev_priv(dev);
991 struct netdev_hw_addr *ha;
992 unsigned char address[4];
993
994 int i;
995
996 /*BMS the next line is CRUCIAL or you may be sad when you */
997 /*BMS ifconfig tr down or hot unplug a PCMCIA card ??hownowbrowncow*/
998 if (/*BMSHELPdev->start == 0 ||*/ ti->open_status != OPEN) return;
999 address[0] = address[1] = address[2] = address[3] = 0;
1000 netdev_for_each_mc_addr(ha, dev) {
1001 address[0] |= ha->addr[2];
1002 address[1] |= ha->addr[3];
1003 address[2] |= ha->addr[4];
1004 address[3] |= ha->addr[5];
1005 }
1006 SET_PAGE(ti->srb_page);
1007 for (i = 0; i < sizeof(struct srb_set_funct_addr); i++)
1008 writeb(0, ti->srb + i);
1009
1010 #define FUNCT_ADDRESS_OFST 6
1011
1012 writeb(DIR_SET_FUNC_ADDR, ti->srb + COMMAND_OFST);
1013 for (i = 0; i < 4; i++)
1014 writeb(address[i], ti->srb + FUNCT_ADDRESS_OFST + i);
1015 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1016 #if TR_VERBOSE
1017 DPRINTK("Setting functional address: ");
1018 for (i=0;i<4;i++) printk("%02X ", address[i]);
1019 printk("\n");
1020 #endif
1021 }
1022
1023 /*****************************************************************************/
1024
1025 #define STATION_ID_OFST 4
1026
1027 static netdev_tx_t tok_send_packet(struct sk_buff *skb,
1028 struct net_device *dev)
1029 {
1030 struct tok_info *ti;
1031 unsigned long flags;
1032 ti = netdev_priv(dev);
1033
1034 netif_stop_queue(dev);
1035
1036 /* lock against other CPUs */
1037 spin_lock_irqsave(&(ti->lock), flags);
1038
1039 /* Save skb; we'll need it when the adapter asks for the data */
1040 ti->current_skb = skb;
1041 SET_PAGE(ti->srb_page);
1042 writeb(XMIT_UI_FRAME, ti->srb + COMMAND_OFST);
1043 writew(ti->exsap_station_id, ti->srb + STATION_ID_OFST);
1044 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1045 spin_unlock_irqrestore(&(ti->lock), flags);
1046 return NETDEV_TX_OK;
1047 }
1048
1049 /*****************************************************************************/
1050
1051 static int tok_close(struct net_device *dev)
1052 {
1053 struct tok_info *ti = netdev_priv(dev);
1054
1055 /* Important for PCMCIA hot unplug, otherwise, we'll pull the card, */
1056 /* unloading the module from memory, and then if a timer pops, ouch */
1057 del_timer_sync(&ti->tr_timer);
1058 outb(0, dev->base_addr + ADAPTRESET);
1059 ti->sram_phys |= 1;
1060 ti->open_status = CLOSED;
1061
1062 netif_stop_queue(dev);
1063 DPRINTK("Adapter is closed.\n");
1064 return 0;
1065 }
1066
1067 /*****************************************************************************/
1068
1069 #define RETCODE_OFST 2
1070 #define OPEN_ERROR_CODE_OFST 6
1071 #define ASB_ADDRESS_OFST 8
1072 #define SRB_ADDRESS_OFST 10
1073 #define ARB_ADDRESS_OFST 12
1074 #define SSB_ADDRESS_OFST 14
1075
1076 static char *printphase[]= {"Lobe media test","Physical insertion",
1077 "Address verification","Roll call poll","Request Parameters"};
1078 static char *printerror[]={"Function failure","Signal loss","Reserved",
1079 "Frequency error","Timeout","Ring failure","Ring beaconing",
1080 "Duplicate node address",
1081 "Parameter request-retry count exceeded","Remove received",
1082 "IMPL force received","Duplicate modifier",
1083 "No monitor detected","Monitor contention failed for RPL"};
1084
1085 static void __iomem *map_address(struct tok_info *ti, unsigned index, __u8 *page)
1086 {
1087 if (ti->page_mask) {
1088 *page = (index >> 8) & ti->page_mask;
1089 index &= ~(ti->page_mask << 8);
1090 }
1091 return ti->sram_virt + index;
1092 }
1093
1094 static void dir_open_adapter (struct net_device *dev)
1095 {
1096 struct tok_info *ti = netdev_priv(dev);
1097 unsigned char ret_code;
1098 __u16 err;
1099
1100 ti->srb = map_address(ti,
1101 ntohs(readw(ti->init_srb + SRB_ADDRESS_OFST)),
1102 &ti->srb_page);
1103 ti->ssb = map_address(ti,
1104 ntohs(readw(ti->init_srb + SSB_ADDRESS_OFST)),
1105 &ti->ssb_page);
1106 ti->arb = map_address(ti,
1107 ntohs(readw(ti->init_srb + ARB_ADDRESS_OFST)),
1108 &ti->arb_page);
1109 ti->asb = map_address(ti,
1110 ntohs(readw(ti->init_srb + ASB_ADDRESS_OFST)),
1111 &ti->asb_page);
1112 ti->current_skb = NULL;
1113 ret_code = readb(ti->init_srb + RETCODE_OFST);
1114 err = ntohs(readw(ti->init_srb + OPEN_ERROR_CODE_OFST));
1115 if (!ret_code) {
1116 ti->open_status = OPEN; /* TR adapter is now available */
1117 if (ti->open_mode == AUTOMATIC) {
1118 DPRINTK("Adapter reopened.\n");
1119 }
1120 writeb(~SRB_RESP_INT, ti->mmio+ACA_OFFSET+ACA_RESET+ISRP_ODD);
1121 open_sap(EXTENDED_SAP, dev);
1122 return;
1123 }
1124 ti->open_failure = YES;
1125 if (ret_code == 7){
1126 if (err == 0x24) {
1127 if (!ti->auto_speedsave) {
1128 DPRINTK("Open failed: Adapter speed must match "
1129 "ring speed if Automatic Ring Speed Save is "
1130 "disabled.\n");
1131 ti->open_action = FAIL;
1132 }else
1133 DPRINTK("Retrying open to adjust to "
1134 "ring speed, ");
1135 } else if (err == 0x2d) {
1136 DPRINTK("Physical Insertion: No Monitor Detected, ");
1137 printk("retrying after %ds delay...\n",
1138 TR_RETRY_INTERVAL/HZ);
1139 } else if (err == 0x11) {
1140 DPRINTK("Lobe Media Function Failure (0x11), ");
1141 printk(" retrying after %ds delay...\n",
1142 TR_RETRY_INTERVAL/HZ);
1143 } else {
1144 char **prphase = printphase;
1145 char **prerror = printerror;
1146 int pnr = err / 16 - 1;
1147 int enr = err % 16 - 1;
1148 DPRINTK("TR Adapter misc open failure, error code = ");
1149 if (pnr < 0 || pnr >= ARRAY_SIZE(printphase) ||
1150 enr < 0 ||
1151 enr >= ARRAY_SIZE(printerror))
1152 printk("0x%x, invalid Phase/Error.", err);
1153 else
1154 printk("0x%x, Phase: %s, Error: %s\n", err,
1155 prphase[pnr], prerror[enr]);
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
1174 static irqreturn_t tok_interrupt(int irq, void *dev_id)
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\n", dev,irq);
1187 #endif
1188 ti = netdev_priv(dev);
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;
1239 netif_carrier_off(dev);
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);
1320 netif_carrier_on(dev);
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);
1424 netif_carrier_off(dev);
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 dev->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
1500 static 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 = netdev_priv(dev);
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) != 0;
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
1567 static void tr_tx(struct net_device *dev)
1568 {
1569 struct tok_info *ti = netdev_priv(dev);
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 dev->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
1681 static void tr_rx(struct net_device *dev)
1682 {
1683 struct tok_info *ti = netdev_priv(dev);
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 dev->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 u8 saddr[6];
1752 u8 daddr[6];
1753 int i;
1754 for (i = 0 ; i < 6 ; i++)
1755 saddr[i] = readb(trhhdr + SADDR_OFST + i);
1756 for (i = 0 ; i < 6 ; i++)
1757 daddr[i] = readb(trhhdr + DADDR_OFST + i);
1758 DPRINTK("Probably non-IP frame received.\n");
1759 DPRINTK("ssap: %02X dsap: %02X "
1760 "saddr: %pM daddr: %pM\n",
1761 readb(llc + SSAP_OFST), readb(llc + DSAP_OFST),
1762 saddr, daddr);
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 dev->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 data = skb->data;
1781 rbuffer_len = ntohs(readw(rbuf + offsetof(struct rec_buf, buf_len)));
1782 rbufdata = rbuf + offsetof(struct rec_buf, data);
1783
1784 if (IPv4_p) {
1785 /* Copy the headers without checksumming */
1786 memcpy_fromio(data, rbufdata, hdr_len);
1787
1788 /* Watch for padded packets and bogons */
1789 iph= (struct iphdr *)(data+ lan_hdr_len + sizeof(struct trllc));
1790 ip_len = ntohs(iph->tot_len) - sizeof(struct iphdr);
1791 length -= hdr_len;
1792 if ((ip_len <= length) && (ip_len > 7))
1793 length = ip_len;
1794 data += hdr_len;
1795 rbuffer_len -= hdr_len;
1796 rbufdata += hdr_len;
1797 }
1798 /* Copy the payload... */
1799 #define BUFFER_POINTER_OFST 2
1800 #define BUFFER_LENGTH_OFST 6
1801 for (;;) {
1802 if (ibmtr_debug_trace&TRC_INITV && length < rbuffer_len)
1803 DPRINTK("CURIOUS, length=%d < rbuffer_len=%d\n",
1804 length,rbuffer_len);
1805 if (IPv4_p)
1806 chksum=csum_partial_copy_nocheck((void*)rbufdata,
1807 data,length<rbuffer_len?length:rbuffer_len,chksum);
1808 else
1809 memcpy_fromio(data, rbufdata, rbuffer_len);
1810 rbuffer = ntohs(readw(rbuf+BUFFER_POINTER_OFST)) ;
1811 if (!rbuffer)
1812 break;
1813 rbuffer -= 2;
1814 length -= rbuffer_len;
1815 data += rbuffer_len;
1816 rbuf = map_address(ti, rbuffer, &rbuffer_page);
1817 SET_PAGE(rbuffer_page);
1818 rbuffer_len = ntohs(readw(rbuf + BUFFER_LENGTH_OFST));
1819 rbufdata = rbuf + offsetof(struct rec_buf, data);
1820 }
1821
1822 SET_PAGE(ti->asb_page);
1823 writeb(0, ti->asb + offsetof(struct asb_rec, ret_code));
1824
1825 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1826
1827 dev->stats.rx_bytes += skb->len;
1828 dev->stats.rx_packets++;
1829
1830 skb->protocol = tr_type_trans(skb, dev);
1831 if (IPv4_p) {
1832 skb->csum = chksum;
1833 skb->ip_summed = CHECKSUM_COMPLETE;
1834 }
1835 netif_rx(skb);
1836 } /*tr_rx */
1837
1838 /*****************************************************************************/
1839
1840 static void ibmtr_reset_timer(struct timer_list *tmr, struct net_device *dev)
1841 {
1842 tmr->expires = jiffies + TR_RETRY_INTERVAL;
1843 tmr->data = (unsigned long) dev;
1844 tmr->function = tok_rerun;
1845 init_timer(tmr);
1846 add_timer(tmr);
1847 }
1848
1849 /*****************************************************************************/
1850
1851 static void tok_rerun(unsigned long dev_addr)
1852 {
1853 struct net_device *dev = (struct net_device *)dev_addr;
1854 struct tok_info *ti = netdev_priv(dev);
1855
1856 if ( ti->open_action == RESTART){
1857 ti->do_tok_int = FIRST_INT;
1858 outb(0, dev->base_addr + ADAPTRESETREL);
1859 #ifdef ENABLE_PAGING
1860 if (ti->page_mask)
1861 writeb(SRPR_ENABLE_PAGING,
1862 ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1863 #endif
1864
1865 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1866 } else
1867 tok_open_adapter(dev_addr);
1868 }
1869
1870 /*****************************************************************************/
1871
1872 static void ibmtr_readlog(struct net_device *dev)
1873 {
1874 struct tok_info *ti;
1875
1876 ti = netdev_priv(dev);
1877
1878 ti->readlog_pending = 0;
1879 SET_PAGE(ti->srb_page);
1880 writeb(DIR_READ_LOG, ti->srb);
1881 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1882 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1883
1884 netif_stop_queue(dev);
1885
1886 }
1887
1888 /*****************************************************************************/
1889
1890 static int ibmtr_change_mtu(struct net_device *dev, int mtu)
1891 {
1892 struct tok_info *ti = netdev_priv(dev);
1893
1894 if (ti->ring_speed == 16 && mtu > ti->maxmtu16)
1895 return -EINVAL;
1896 if (ti->ring_speed == 4 && mtu > ti->maxmtu4)
1897 return -EINVAL;
1898 dev->mtu = mtu;
1899 return 0;
1900 }
1901
1902 /*****************************************************************************/
1903 #ifdef MODULE
1904
1905 /* 3COM 3C619C supports 8 interrupts, 32 I/O ports */
1906 static struct net_device *dev_ibmtr[IBMTR_MAX_ADAPTERS];
1907 static int io[IBMTR_MAX_ADAPTERS] = { 0xa20, 0xa24 };
1908 static int irq[IBMTR_MAX_ADAPTERS];
1909 static int mem[IBMTR_MAX_ADAPTERS];
1910
1911 MODULE_LICENSE("GPL");
1912
1913 module_param_array(io, int, NULL, 0);
1914 module_param_array(irq, int, NULL, 0);
1915 module_param_array(mem, int, NULL, 0);
1916
1917 static int __init ibmtr_init(void)
1918 {
1919 int i;
1920 int count=0;
1921
1922 find_turbo_adapters(io);
1923
1924 for (i = 0; i < IBMTR_MAX_ADAPTERS && io[i]; i++) {
1925 struct net_device *dev;
1926 irq[i] = 0;
1927 mem[i] = 0;
1928 dev = alloc_trdev(sizeof(struct tok_info));
1929 if (dev == NULL) {
1930 if (i == 0)
1931 return -ENOMEM;
1932 break;
1933 }
1934 dev->base_addr = io[i];
1935 dev->irq = irq[i];
1936 dev->mem_start = mem[i];
1937
1938 if (ibmtr_probe_card(dev)) {
1939 free_netdev(dev);
1940 continue;
1941 }
1942 dev_ibmtr[i] = dev;
1943 count++;
1944 }
1945 if (count) return 0;
1946 printk("ibmtr: register_netdev() returned non-zero.\n");
1947 return -EIO;
1948 }
1949 module_init(ibmtr_init);
1950
1951 static void __exit ibmtr_cleanup(void)
1952 {
1953 int i;
1954
1955 for (i = 0; i < IBMTR_MAX_ADAPTERS; i++){
1956 if (!dev_ibmtr[i])
1957 continue;
1958 unregister_netdev(dev_ibmtr[i]);
1959 ibmtr_cleanup_card(dev_ibmtr[i]);
1960 free_netdev(dev_ibmtr[i]);
1961 }
1962 }
1963 module_exit(ibmtr_cleanup);
1964 #endif