[PATCH] irq-flags: SPARC: Use the new IRQF_ constants
[linux-2.6.git] / arch / sparc / kernel / sun4d_irq.c
1 /*  $Id: sun4d_irq.c,v 1.29 2001/12/11 04:55:51 davem Exp $
2  *  arch/sparc/kernel/sun4d_irq.c:
3  *                      SS1000/SC2000 interrupt handling.
4  *
5  *  Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
6  *  Heavily based on arch/sparc/kernel/irq.c.
7  */
8
9 #include <linux/errno.h>
10 #include <linux/linkage.h>
11 #include <linux/kernel_stat.h>
12 #include <linux/signal.h>
13 #include <linux/sched.h>
14 #include <linux/ptrace.h>
15 #include <linux/interrupt.h>
16 #include <linux/slab.h>
17 #include <linux/random.h>
18 #include <linux/init.h>
19 #include <linux/smp.h>
20 #include <linux/smp_lock.h>
21 #include <linux/spinlock.h>
22 #include <linux/seq_file.h>
23
24 #include <asm/ptrace.h>
25 #include <asm/processor.h>
26 #include <asm/system.h>
27 #include <asm/psr.h>
28 #include <asm/smp.h>
29 #include <asm/vaddrs.h>
30 #include <asm/timer.h>
31 #include <asm/openprom.h>
32 #include <asm/oplib.h>
33 #include <asm/traps.h>
34 #include <asm/irq.h>
35 #include <asm/io.h>
36 #include <asm/pgalloc.h>
37 #include <asm/pgtable.h>
38 #include <asm/sbus.h>
39 #include <asm/sbi.h>
40 #include <asm/cacheflush.h>
41
42 /* If you trust current SCSI layer to handle different SCSI IRQs, enable this. I don't trust it... -jj */
43 /* #define DISTRIBUTE_IRQS */
44
45 struct sun4d_timer_regs *sun4d_timers;
46 #define TIMER_IRQ       10
47
48 #define MAX_STATIC_ALLOC        4
49 extern struct irqaction static_irqaction[MAX_STATIC_ALLOC];
50 extern int static_irq_count;
51 unsigned char cpu_leds[32];
52 #ifdef CONFIG_SMP
53 unsigned char sbus_tid[32];
54 #endif
55
56 static struct irqaction *irq_action[NR_IRQS];
57 extern spinlock_t irq_action_lock;
58
59 struct sbus_action {
60         struct irqaction *action;
61         /* For SMP this needs to be extended */
62 } *sbus_actions;
63
64 static int pil_to_sbus[] = {
65         0, 0, 1, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 0,
66 };
67
68 static int sbus_to_pil[] = {
69         0, 2, 3, 5, 7, 9, 11, 13,
70 };
71
72 static int nsbi;
73 #ifdef CONFIG_SMP
74 DEFINE_SPINLOCK(sun4d_imsk_lock);
75 #endif
76
77 int show_sun4d_interrupts(struct seq_file *p, void *v)
78 {
79         int i = *(loff_t *) v, j = 0, k = 0, sbusl;
80         struct irqaction * action;
81         unsigned long flags;
82 #ifdef CONFIG_SMP
83         int x;
84 #endif
85
86         spin_lock_irqsave(&irq_action_lock, flags);
87         if (i < NR_IRQS) {
88                 sbusl = pil_to_sbus[i];
89                 if (!sbusl) {
90                         action = *(i + irq_action);
91                         if (!action) 
92                                 goto out_unlock;
93                 } else {
94                         for (j = 0; j < nsbi; j++) {
95                                 for (k = 0; k < 4; k++)
96                                         if ((action = sbus_actions [(j << 5) + (sbusl << 2) + k].action))
97                                                 goto found_it;
98                         }
99                         goto out_unlock;
100                 }
101 found_it:       seq_printf(p, "%3d: ", i);
102 #ifndef CONFIG_SMP
103                 seq_printf(p, "%10u ", kstat_irqs(i));
104 #else
105                 for_each_online_cpu(x)
106                         seq_printf(p, "%10u ",
107                                kstat_cpu(cpu_logical_map(x)).irqs[i]);
108 #endif
109                 seq_printf(p, "%c %s",
110                         (action->flags & IRQF_DISABLED) ? '+' : ' ',
111                         action->name);
112                 action = action->next;
113                 for (;;) {
114                         for (; action; action = action->next) {
115                                 seq_printf(p, ",%s %s",
116                                         (action->flags & IRQF_DISABLED) ? " +" : "",
117                                         action->name);
118                         }
119                         if (!sbusl) break;
120                         k++;
121                         if (k < 4)
122                                 action = sbus_actions [(j << 5) + (sbusl << 2) + k].action;
123                         else {
124                                 j++;
125                                 if (j == nsbi) break;
126                                 k = 0;
127                                 action = sbus_actions [(j << 5) + (sbusl << 2)].action;
128                         }
129                 }
130                 seq_putc(p, '\n');
131         }
132 out_unlock:
133         spin_unlock_irqrestore(&irq_action_lock, flags);
134         return 0;
135 }
136
137 void sun4d_free_irq(unsigned int irq, void *dev_id)
138 {
139         struct irqaction *action, **actionp;
140         struct irqaction *tmp = NULL;
141         unsigned long flags;
142
143         spin_lock_irqsave(&irq_action_lock, flags);
144         if (irq < 15)
145                 actionp = irq + irq_action;
146         else
147                 actionp = &(sbus_actions[irq - (1 << 5)].action);
148         action = *actionp;
149         if (!action) {
150                 printk("Trying to free free IRQ%d\n",irq);
151                 goto out_unlock;
152         }
153         if (dev_id) {
154                 for (; action; action = action->next) {
155                         if (action->dev_id == dev_id)
156                                 break;
157                         tmp = action;
158                 }
159                 if (!action) {
160                         printk("Trying to free free shared IRQ%d\n",irq);
161                         goto out_unlock;
162                 }
163         } else if (action->flags & IRQF_SHARED) {
164                 printk("Trying to free shared IRQ%d with NULL device ID\n", irq);
165                 goto out_unlock;
166         }
167         if (action->flags & SA_STATIC_ALLOC)
168         {
169                 /* This interrupt is marked as specially allocated
170                  * so it is a bad idea to free it.
171                  */
172                 printk("Attempt to free statically allocated IRQ%d (%s)\n",
173                        irq, action->name);
174                 goto out_unlock;
175         }
176         
177         if (action && tmp)
178                 tmp->next = action->next;
179         else
180                 *actionp = action->next;
181
182         spin_unlock_irqrestore(&irq_action_lock, flags);
183
184         synchronize_irq(irq);
185
186         spin_lock_irqsave(&irq_action_lock, flags);
187
188         kfree(action);
189
190         if (!(*actionp))
191                 disable_irq(irq);
192
193 out_unlock:
194         spin_unlock_irqrestore(&irq_action_lock, flags);
195 }
196
197 extern void unexpected_irq(int, void *, struct pt_regs *);
198
199 void sun4d_handler_irq(int irq, struct pt_regs * regs)
200 {
201         struct irqaction * action;
202         int cpu = smp_processor_id();
203         /* SBUS IRQ level (1 - 7) */
204         int sbusl = pil_to_sbus[irq];
205         
206         /* FIXME: Is this necessary?? */
207         cc_get_ipen();
208         
209         cc_set_iclr(1 << irq);
210         
211         irq_enter();
212         kstat_cpu(cpu).irqs[irq]++;
213         if (!sbusl) {
214                 action = *(irq + irq_action);
215                 if (!action)
216                         unexpected_irq(irq, NULL, regs);
217                 do {
218                         action->handler(irq, action->dev_id, regs);
219                         action = action->next;
220                 } while (action);
221         } else {
222                 int bus_mask = bw_get_intr_mask(sbusl) & 0x3ffff;
223                 int sbino;
224                 struct sbus_action *actionp;
225                 unsigned mask, slot;
226                 int sbil = (sbusl << 2);
227                 
228                 bw_clear_intr_mask(sbusl, bus_mask);
229                 
230                 /* Loop for each pending SBI */
231                 for (sbino = 0; bus_mask; sbino++, bus_mask >>= 1)
232                         if (bus_mask & 1) {
233                                 mask = acquire_sbi(SBI2DEVID(sbino), 0xf << sbil);
234                                 mask &= (0xf << sbil);
235                                 actionp = sbus_actions + (sbino << 5) + (sbil);
236                                 /* Loop for each pending SBI slot */
237                                 for (slot = (1 << sbil); mask; slot <<= 1, actionp++)
238                                         if (mask & slot) {
239                                                 mask &= ~slot;
240                                                 action = actionp->action;
241                                                 
242                                                 if (!action)
243                                                         unexpected_irq(irq, NULL, regs);
244                                                 do {
245                                                         action->handler(irq, action->dev_id, regs);
246                                                         action = action->next;
247                                                 } while (action);
248                                                 release_sbi(SBI2DEVID(sbino), slot);
249                                         }
250                         }
251         }
252         irq_exit();
253 }
254
255 unsigned int sun4d_build_irq(struct sbus_dev *sdev, int irq)
256 {
257         int sbusl = pil_to_sbus[irq];
258
259         if (sbusl)
260                 return ((sdev->bus->board + 1) << 5) + (sbusl << 2) + sdev->slot;
261         else
262                 return irq;
263 }
264
265 unsigned int sun4d_sbint_to_irq(struct sbus_dev *sdev, unsigned int sbint)
266 {
267         if (sbint >= sizeof(sbus_to_pil)) {
268                 printk(KERN_ERR "%s: bogus SBINT %d\n", sdev->prom_name, sbint);
269                 BUG();
270         }
271         return sun4d_build_irq(sdev, sbus_to_pil[sbint]);
272 }
273
274 int sun4d_request_irq(unsigned int irq,
275                 irqreturn_t (*handler)(int, void *, struct pt_regs *),
276                 unsigned long irqflags, const char * devname, void *dev_id)
277 {
278         struct irqaction *action, *tmp = NULL, **actionp;
279         unsigned long flags;
280         int ret;
281         
282         if(irq > 14 && irq < (1 << 5)) {
283                 ret = -EINVAL;
284                 goto out;
285         }
286
287         if (!handler) {
288                 ret = -EINVAL;
289                 goto out;
290         }
291
292         spin_lock_irqsave(&irq_action_lock, flags);
293
294         if (irq >= (1 << 5))
295                 actionp = &(sbus_actions[irq - (1 << 5)].action);
296         else
297                 actionp = irq + irq_action;
298         action = *actionp;
299         
300         if (action) {
301                 if ((action->flags & IRQF_SHARED) && (irqflags & IRQF_SHARED)) {
302                         for (tmp = action; tmp->next; tmp = tmp->next);
303                 } else {
304                         ret = -EBUSY;
305                         goto out_unlock;
306                 }
307                 if ((action->flags & IRQF_DISABLED) ^ (irqflags & IRQF_DISABLED)) {
308                         printk("Attempt to mix fast and slow interrupts on IRQ%d denied\n", irq);
309                         ret = -EBUSY;
310                         goto out_unlock;
311                 }
312                 action = NULL;          /* Or else! */
313         }
314
315         /* If this is flagged as statically allocated then we use our
316          * private struct which is never freed.
317          */
318         if (irqflags & SA_STATIC_ALLOC) {
319                 if (static_irq_count < MAX_STATIC_ALLOC)
320                         action = &static_irqaction[static_irq_count++];
321                 else
322                         printk("Request for IRQ%d (%s) SA_STATIC_ALLOC failed using kmalloc\n", irq, devname);
323         }
324         
325         if (action == NULL)
326                 action = (struct irqaction *)kmalloc(sizeof(struct irqaction),
327                                                      GFP_ATOMIC);
328         
329         if (!action) { 
330                 ret = -ENOMEM;
331                 goto out_unlock;
332         }
333
334         action->handler = handler;
335         action->flags = irqflags;
336         cpus_clear(action->mask);
337         action->name = devname;
338         action->next = NULL;
339         action->dev_id = dev_id;
340
341         if (tmp)
342                 tmp->next = action;
343         else
344                 *actionp = action;
345                 
346         enable_irq(irq);
347
348         ret = 0;
349 out_unlock:
350         spin_unlock_irqrestore(&irq_action_lock, flags);
351 out:
352         return ret;
353 }
354
355 static void sun4d_disable_irq(unsigned int irq)
356 {
357 #ifdef CONFIG_SMP
358         int tid = sbus_tid[(irq >> 5) - 1];
359         unsigned long flags;
360 #endif  
361         
362         if (irq < NR_IRQS) return;
363 #ifdef CONFIG_SMP
364         spin_lock_irqsave(&sun4d_imsk_lock, flags);
365         cc_set_imsk_other(tid, cc_get_imsk_other(tid) | (1 << sbus_to_pil[(irq >> 2) & 7]));
366         spin_unlock_irqrestore(&sun4d_imsk_lock, flags);
367 #else           
368         cc_set_imsk(cc_get_imsk() | (1 << sbus_to_pil[(irq >> 2) & 7]));
369 #endif
370 }
371
372 static void sun4d_enable_irq(unsigned int irq)
373 {
374 #ifdef CONFIG_SMP
375         int tid = sbus_tid[(irq >> 5) - 1];
376         unsigned long flags;
377 #endif  
378         
379         if (irq < NR_IRQS) return;
380 #ifdef CONFIG_SMP
381         spin_lock_irqsave(&sun4d_imsk_lock, flags);
382         cc_set_imsk_other(tid, cc_get_imsk_other(tid) & ~(1 << sbus_to_pil[(irq >> 2) & 7]));
383         spin_unlock_irqrestore(&sun4d_imsk_lock, flags);
384 #else           
385         cc_set_imsk(cc_get_imsk() & ~(1 << sbus_to_pil[(irq >> 2) & 7]));
386 #endif
387 }
388
389 #ifdef CONFIG_SMP
390 static void sun4d_set_cpu_int(int cpu, int level)
391 {
392         sun4d_send_ipi(cpu, level);
393 }
394
395 static void sun4d_clear_ipi(int cpu, int level)
396 {
397 }
398
399 static void sun4d_set_udt(int cpu)
400 {
401 }
402
403 /* Setup IRQ distribution scheme. */
404 void __init sun4d_distribute_irqs(void)
405 {
406 #ifdef DISTRIBUTE_IRQS
407         struct sbus_bus *sbus;
408         unsigned long sbus_serving_map;
409
410         sbus_serving_map = cpu_present_map;
411         for_each_sbus(sbus) {
412                 if ((sbus->board * 2) == boot_cpu_id && (cpu_present_map & (1 << (sbus->board * 2 + 1))))
413                         sbus_tid[sbus->board] = (sbus->board * 2 + 1);
414                 else if (cpu_present_map & (1 << (sbus->board * 2)))
415                         sbus_tid[sbus->board] = (sbus->board * 2);
416                 else if (cpu_present_map & (1 << (sbus->board * 2 + 1)))
417                         sbus_tid[sbus->board] = (sbus->board * 2 + 1);
418                 else
419                         sbus_tid[sbus->board] = 0xff;
420                 if (sbus_tid[sbus->board] != 0xff)
421                         sbus_serving_map &= ~(1 << sbus_tid[sbus->board]);
422         }
423         for_each_sbus(sbus)
424                 if (sbus_tid[sbus->board] == 0xff) {
425                         int i = 31;
426                                 
427                         if (!sbus_serving_map)
428                                 sbus_serving_map = cpu_present_map;
429                         while (!(sbus_serving_map & (1 << i)))
430                                 i--;
431                         sbus_tid[sbus->board] = i;
432                         sbus_serving_map &= ~(1 << i);
433                 }
434         for_each_sbus(sbus) {
435                 printk("sbus%d IRQs directed to CPU%d\n", sbus->board, sbus_tid[sbus->board]);
436                 set_sbi_tid(sbus->devid, sbus_tid[sbus->board] << 3);
437         }
438 #else
439         struct sbus_bus *sbus;
440         int cpuid = cpu_logical_map(1);
441
442         if (cpuid == -1)
443                 cpuid = cpu_logical_map(0);
444         for_each_sbus(sbus) {
445                 sbus_tid[sbus->board] = cpuid;
446                 set_sbi_tid(sbus->devid, cpuid << 3);
447         }
448         printk("All sbus IRQs directed to CPU%d\n", cpuid);
449 #endif
450 }
451 #endif
452  
453 static void sun4d_clear_clock_irq(void)
454 {
455         volatile unsigned int clear_intr;
456         clear_intr = sun4d_timers->l10_timer_limit;
457 }
458
459 static void sun4d_clear_profile_irq(int cpu)
460 {
461         bw_get_prof_limit(cpu);
462 }
463
464 static void sun4d_load_profile_irq(int cpu, unsigned int limit)
465 {
466         bw_set_prof_limit(cpu, limit);
467 }
468
469 static void __init sun4d_init_timers(irqreturn_t (*counter_fn)(int, void *, struct pt_regs *))
470 {
471         int irq;
472         int cpu;
473         struct resource r;
474         int mid;
475
476         /* Map the User Timer registers. */
477         memset(&r, 0, sizeof(r));
478 #ifdef CONFIG_SMP
479         r.start = CSR_BASE(boot_cpu_id)+BW_TIMER_LIMIT;
480 #else
481         r.start = CSR_BASE(0)+BW_TIMER_LIMIT;
482 #endif
483         r.flags = 0xf;
484         sun4d_timers = (struct sun4d_timer_regs *) sbus_ioremap(&r, 0,
485             PAGE_SIZE, "user timer");
486
487         sun4d_timers->l10_timer_limit =  (((1000000/HZ) + 1) << 10);
488         master_l10_counter = &sun4d_timers->l10_cur_count;
489         master_l10_limit = &sun4d_timers->l10_timer_limit;
490
491         irq = request_irq(TIMER_IRQ,
492                           counter_fn,
493                           (IRQF_DISABLED | SA_STATIC_ALLOC),
494                           "timer", NULL);
495         if (irq) {
496                 prom_printf("time_init: unable to attach IRQ%d\n",TIMER_IRQ);
497                 prom_halt();
498         }
499         
500         /* Enable user timer free run for CPU 0 in BW */
501         /* bw_set_ctrl(0, bw_get_ctrl(0) | BW_CTRL_USER_TIMER); */
502
503         cpu = 0;
504         while (!cpu_find_by_instance(cpu, NULL, &mid)) {
505                 sun4d_load_profile_irq(mid >> 3, 0);
506                 cpu++;
507         }
508                 
509 #ifdef CONFIG_SMP
510         {
511                 unsigned long flags;
512                 extern unsigned long lvl14_save[4];
513                 struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (14 - 1)];
514                 extern unsigned int real_irq_entry[], smp4d_ticker[];
515                 extern unsigned int patchme_maybe_smp_msg[];
516
517                 /* Adjust so that we jump directly to smp4d_ticker */
518                 lvl14_save[2] += smp4d_ticker - real_irq_entry;
519
520                 /* For SMP we use the level 14 ticker, however the bootup code
521                  * has copied the firmwares level 14 vector into boot cpu's
522                  * trap table, we must fix this now or we get squashed.
523                  */
524                 local_irq_save(flags);
525                 patchme_maybe_smp_msg[0] = 0x01000000; /* NOP out the branch */
526                 trap_table->inst_one = lvl14_save[0];
527                 trap_table->inst_two = lvl14_save[1];
528                 trap_table->inst_three = lvl14_save[2];
529                 trap_table->inst_four = lvl14_save[3];
530                 local_flush_cache_all();
531                 local_irq_restore(flags);
532         }
533 #endif
534 }
535
536 void __init sun4d_init_sbi_irq(void)
537 {
538         struct sbus_bus *sbus;
539         unsigned mask;
540
541         nsbi = 0;
542         for_each_sbus(sbus)
543                 nsbi++;
544         sbus_actions = (struct sbus_action *)kmalloc (nsbi * 8 * 4 * sizeof(struct sbus_action), GFP_ATOMIC);
545         memset (sbus_actions, 0, (nsbi * 8 * 4 * sizeof(struct sbus_action)));
546         for_each_sbus(sbus) {
547 #ifdef CONFIG_SMP       
548                 extern unsigned char boot_cpu_id;
549                 
550                 set_sbi_tid(sbus->devid, boot_cpu_id << 3);
551                 sbus_tid[sbus->board] = boot_cpu_id;
552 #endif
553                 /* Get rid of pending irqs from PROM */
554                 mask = acquire_sbi(sbus->devid, 0xffffffff);
555                 if (mask) {
556                         printk ("Clearing pending IRQs %08x on SBI %d\n", mask, sbus->board);
557                         release_sbi(sbus->devid, mask);
558                 }
559         }
560 }
561
562 void __init sun4d_init_IRQ(void)
563 {
564         local_irq_disable();
565
566         BTFIXUPSET_CALL(sbint_to_irq, sun4d_sbint_to_irq, BTFIXUPCALL_NORM);
567         BTFIXUPSET_CALL(enable_irq, sun4d_enable_irq, BTFIXUPCALL_NORM);
568         BTFIXUPSET_CALL(disable_irq, sun4d_disable_irq, BTFIXUPCALL_NORM);
569         BTFIXUPSET_CALL(clear_clock_irq, sun4d_clear_clock_irq, BTFIXUPCALL_NORM);
570         BTFIXUPSET_CALL(clear_profile_irq, sun4d_clear_profile_irq, BTFIXUPCALL_NORM);
571         BTFIXUPSET_CALL(load_profile_irq, sun4d_load_profile_irq, BTFIXUPCALL_NORM);
572         sparc_init_timers = sun4d_init_timers;
573 #ifdef CONFIG_SMP
574         BTFIXUPSET_CALL(set_cpu_int, sun4d_set_cpu_int, BTFIXUPCALL_NORM);
575         BTFIXUPSET_CALL(clear_cpu_int, sun4d_clear_ipi, BTFIXUPCALL_NOP);
576         BTFIXUPSET_CALL(set_irq_udt, sun4d_set_udt, BTFIXUPCALL_NOP);
577 #endif
578         /* Cannot enable interrupts until OBP ticker is disabled. */
579 }