blob: 3a6db04aa9405a87d7098a41c945a77ba950f143 [file] [log] [blame]
Geoff Levand2832a812006-11-23 00:46:56 +01001/*
2 * PS3 interrupt routines.
3 *
4 * Copyright (C) 2006 Sony Computer Entertainment Inc.
5 * Copyright 2006 Sony Corp.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include <linux/kernel.h>
22#include <linux/module.h>
23#include <linux/irq.h>
24
25#include <asm/machdep.h>
26#include <asm/udbg.h>
Geoff Levand2832a812006-11-23 00:46:56 +010027#include <asm/lv1call.h>
Stephen Rothwell42d284bc2007-05-28 10:19:08 +100028#include <asm/smp.h>
Geoff Levand2832a812006-11-23 00:46:56 +010029
30#include "platform.h"
31
32#if defined(DEBUG)
Geert Uytterhoeven83bb6432007-06-16 07:19:23 +100033#define DBG udbg_printf
Geoff Levand2832a812006-11-23 00:46:56 +010034#else
Geert Uytterhoeven83bb6432007-06-16 07:19:23 +100035#define DBG pr_debug
Geoff Levand2832a812006-11-23 00:46:56 +010036#endif
37
38/**
Geoff Levand861be322007-01-26 19:08:08 -080039 * struct ps3_bmp - a per cpu irq status and mask bitmap structure
40 * @status: 256 bit status bitmap indexed by plug
41 * @unused_1:
42 * @mask: 256 bit mask bitmap indexed by plug
43 * @unused_2:
44 * @lock:
45 * @ipi_debug_brk_mask:
46 *
47 * The HV mantains per SMT thread mappings of HV outlet to HV plug on
48 * behalf of the guest. These mappings are implemented as 256 bit guest
49 * supplied bitmaps indexed by plug number. The addresses of the bitmaps
50 * are registered with the HV through lv1_configure_irq_state_bitmap().
Geoff Levand57715762007-01-26 19:08:16 -080051 * The HV requires that the 512 bits of status + mask not cross a page
52 * boundary. PS3_BMP_MINALIGN is used to define this minimal 64 byte
53 * alignment.
Geoff Levand861be322007-01-26 19:08:08 -080054 *
55 * The HV supports 256 plugs per thread, assigned as {0..255}, for a total
56 * of 512 plugs supported on a processor. To simplify the logic this
57 * implementation equates HV plug value to Linux virq value, constrains each
58 * interrupt to have a system wide unique plug number, and limits the range
59 * of the plug values to map into the first dword of the bitmaps. This
60 * gives a usable range of plug values of {NUM_ISA_INTERRUPTS..63}. Note
61 * that there is no constraint on how many in this set an individual thread
62 * can acquire.
63 */
64
Geoff Levand57715762007-01-26 19:08:16 -080065#define PS3_BMP_MINALIGN 64
66
Geoff Levand861be322007-01-26 19:08:08 -080067struct ps3_bmp {
68 struct {
69 u64 status;
70 u64 unused_1[3];
71 u64 mask;
72 u64 unused_2[3];
73 };
74 u64 ipi_debug_brk_mask;
75 spinlock_t lock;
76};
77
78/**
79 * struct ps3_private - a per cpu data structure
80 * @bmp: ps3_bmp structure
Geoff Levandaab83502007-06-16 08:06:04 +100081 * @ppe_id: HV logical_ppe_id
82 * @thread_id: HV thread_id
Geoff Levand861be322007-01-26 19:08:08 -080083 */
84
85struct ps3_private {
Geoff Levand57715762007-01-26 19:08:16 -080086 struct ps3_bmp bmp __attribute__ ((aligned (PS3_BMP_MINALIGN)));
Geoff Levandaab83502007-06-16 08:06:04 +100087 u64 ppe_id;
88 u64 thread_id;
Geoff Levand861be322007-01-26 19:08:08 -080089};
90
91static DEFINE_PER_CPU(struct ps3_private, ps3_private);
92
Geoff Levanddc4f60c2007-05-01 07:01:01 +100093/**
Geoff Levand743c1bb2007-06-16 07:19:18 +100094 * ps3_chip_mask - Set an interrupt mask bit in ps3_bmp.
95 * @virq: The assigned Linux virq.
96 *
97 * Sets ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
98 */
99
100static void ps3_chip_mask(unsigned int virq)
101{
102 struct ps3_private *pd = get_irq_chip_data(virq);
Geoff Levand743c1bb2007-06-16 07:19:18 +1000103 unsigned long flags;
104
Geoff Levandaab83502007-06-16 08:06:04 +1000105 pr_debug("%s:%d: thread_id %lu, virq %d\n", __func__, __LINE__,
106 pd->thread_id, virq);
Geoff Levand743c1bb2007-06-16 07:19:18 +1000107
108 local_irq_save(flags);
Geoff Levanda354ab82007-06-16 08:06:09 +1000109 clear_bit(63 - virq, &pd->bmp.mask);
Geoff Levandaab83502007-06-16 08:06:04 +1000110 lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
Geoff Levand743c1bb2007-06-16 07:19:18 +1000111 local_irq_restore(flags);
112}
113
114/**
115 * ps3_chip_unmask - Clear an interrupt mask bit in ps3_bmp.
116 * @virq: The assigned Linux virq.
117 *
118 * Clears ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
119 */
120
121static void ps3_chip_unmask(unsigned int virq)
122{
123 struct ps3_private *pd = get_irq_chip_data(virq);
Geoff Levand743c1bb2007-06-16 07:19:18 +1000124 unsigned long flags;
125
Geoff Levandaab83502007-06-16 08:06:04 +1000126 pr_debug("%s:%d: thread_id %lu, virq %d\n", __func__, __LINE__,
127 pd->thread_id, virq);
Geoff Levand743c1bb2007-06-16 07:19:18 +1000128
129 local_irq_save(flags);
Geoff Levanda354ab82007-06-16 08:06:09 +1000130 set_bit(63 - virq, &pd->bmp.mask);
Geoff Levandaab83502007-06-16 08:06:04 +1000131 lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
Geoff Levand743c1bb2007-06-16 07:19:18 +1000132 local_irq_restore(flags);
133}
134
135/**
136 * ps3_chip_eoi - HV end-of-interrupt.
137 * @virq: The assigned Linux virq.
138 *
139 * Calls lv1_end_of_interrupt_ext().
140 */
141
142static void ps3_chip_eoi(unsigned int virq)
143{
144 const struct ps3_private *pd = get_irq_chip_data(virq);
Geoff Levandaab83502007-06-16 08:06:04 +1000145 lv1_end_of_interrupt_ext(pd->ppe_id, pd->thread_id, virq);
Geoff Levand743c1bb2007-06-16 07:19:18 +1000146}
147
148/**
149 * ps3_irq_chip - Represents the ps3_bmp as a Linux struct irq_chip.
150 */
151
152static struct irq_chip ps3_irq_chip = {
153 .typename = "ps3",
154 .mask = ps3_chip_mask,
155 .unmask = ps3_chip_unmask,
156 .eoi = ps3_chip_eoi,
157};
158
159/**
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000160 * ps3_virq_setup - virq related setup.
161 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
162 * serviced on.
163 * @outlet: The HV outlet from the various create outlet routines.
164 * @virq: The assigned Linux virq.
165 *
166 * Calls irq_create_mapping() to get a virq and sets the chip data to
167 * ps3_private data.
168 */
169
170int ps3_virq_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
Geoff Levand861be322007-01-26 19:08:08 -0800171 unsigned int *virq)
172{
173 int result;
174 struct ps3_private *pd;
175
176 /* This defines the default interrupt distribution policy. */
177
178 if (cpu == PS3_BINDING_CPU_ANY)
179 cpu = 0;
180
181 pd = &per_cpu(ps3_private, cpu);
182
183 *virq = irq_create_mapping(NULL, outlet);
184
185 if (*virq == NO_IRQ) {
186 pr_debug("%s:%d: irq_create_mapping failed: outlet %lu\n",
187 __func__, __LINE__, outlet);
188 result = -ENOMEM;
189 goto fail_create;
190 }
191
Geoff Levand861be322007-01-26 19:08:08 -0800192 pr_debug("%s:%d: outlet %lu => cpu %u, virq %u\n", __func__, __LINE__,
193 outlet, cpu, *virq);
194
195 result = set_irq_chip_data(*virq, pd);
196
197 if (result) {
198 pr_debug("%s:%d: set_irq_chip_data failed\n",
199 __func__, __LINE__);
200 goto fail_set;
201 }
202
Geoff Levand9263e852007-06-16 07:19:32 +1000203 ps3_chip_mask(*virq);
204
Geoff Levand861be322007-01-26 19:08:08 -0800205 return result;
206
207fail_set:
Geoff Levand861be322007-01-26 19:08:08 -0800208 irq_dispose_mapping(*virq);
209fail_create:
210 return result;
211}
212
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000213/**
214 * ps3_virq_destroy - virq related teardown.
215 * @virq: The assigned Linux virq.
216 *
217 * Clears chip data and calls irq_dispose_mapping() for the virq.
218 */
219
220int ps3_virq_destroy(unsigned int virq)
221{
222 const struct ps3_private *pd = get_irq_chip_data(virq);
223
Geoff Levandaab83502007-06-16 08:06:04 +1000224 pr_debug("%s:%d: ppe_id %lu, thread_id %lu, virq %u\n", __func__,
225 __LINE__, pd->ppe_id, pd->thread_id, virq);
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000226
227 set_irq_chip_data(virq, NULL);
228 irq_dispose_mapping(virq);
229
230 pr_debug("%s:%d <-\n", __func__, __LINE__);
231 return 0;
232}
233
234/**
235 * ps3_irq_plug_setup - Generic outlet and virq related setup.
236 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
237 * serviced on.
238 * @outlet: The HV outlet from the various create outlet routines.
239 * @virq: The assigned Linux virq.
240 *
241 * Sets up virq and connects the irq plug.
242 */
243
244int ps3_irq_plug_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
245 unsigned int *virq)
246{
247 int result;
248 struct ps3_private *pd;
249
250 result = ps3_virq_setup(cpu, outlet, virq);
251
252 if (result) {
253 pr_debug("%s:%d: ps3_virq_setup failed\n", __func__, __LINE__);
254 goto fail_setup;
255 }
256
257 pd = get_irq_chip_data(*virq);
258
259 /* Binds outlet to cpu + virq. */
260
Geoff Levandaab83502007-06-16 08:06:04 +1000261 result = lv1_connect_irq_plug_ext(pd->ppe_id, pd->thread_id, *virq,
262 outlet, 0);
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000263
264 if (result) {
265 pr_info("%s:%d: lv1_connect_irq_plug_ext failed: %s\n",
266 __func__, __LINE__, ps3_result(result));
267 result = -EPERM;
268 goto fail_connect;
269 }
270
271 return result;
272
273fail_connect:
274 ps3_virq_destroy(*virq);
275fail_setup:
276 return result;
277}
278EXPORT_SYMBOL_GPL(ps3_irq_plug_setup);
279
280/**
281 * ps3_irq_plug_destroy - Generic outlet and virq related teardown.
282 * @virq: The assigned Linux virq.
283 *
284 * Disconnects the irq plug and tears down virq.
285 * Do not call for system bus event interrupts setup with
286 * ps3_sb_event_receive_port_setup().
287 */
288
289int ps3_irq_plug_destroy(unsigned int virq)
Geoff Levand861be322007-01-26 19:08:08 -0800290{
291 int result;
292 const struct ps3_private *pd = get_irq_chip_data(virq);
293
Geoff Levandaab83502007-06-16 08:06:04 +1000294 pr_debug("%s:%d: ppe_id %lu, thread_id %lu, virq %u\n", __func__,
295 __LINE__, pd->ppe_id, pd->thread_id, virq);
Geoff Levand861be322007-01-26 19:08:08 -0800296
Geoff Levand9263e852007-06-16 07:19:32 +1000297 ps3_chip_mask(virq);
298
Geoff Levandaab83502007-06-16 08:06:04 +1000299 result = lv1_disconnect_irq_plug_ext(pd->ppe_id, pd->thread_id, virq);
Geoff Levand861be322007-01-26 19:08:08 -0800300
301 if (result)
302 pr_info("%s:%d: lv1_disconnect_irq_plug_ext failed: %s\n",
303 __func__, __LINE__, ps3_result(result));
304
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000305 ps3_virq_destroy(virq);
306
Geert Uytterhoevenb1eeb382007-01-26 19:08:12 -0800307 return result;
Geoff Levand861be322007-01-26 19:08:08 -0800308}
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000309EXPORT_SYMBOL_GPL(ps3_irq_plug_destroy);
Geoff Levand861be322007-01-26 19:08:08 -0800310
311/**
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000312 * ps3_event_receive_port_setup - Setup an event receive port.
Geoff Levand861be322007-01-26 19:08:08 -0800313 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
314 * serviced on.
Geoff Levand2832a812006-11-23 00:46:56 +0100315 * @virq: The assigned Linux virq.
316 *
317 * The virq can be used with lv1_connect_interrupt_event_receive_port() to
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000318 * arrange to receive interrupts from system-bus devices, or with
319 * ps3_send_event_locally() to signal events.
Geoff Levand2832a812006-11-23 00:46:56 +0100320 */
321
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000322int ps3_event_receive_port_setup(enum ps3_cpu_binding cpu, unsigned int *virq)
Geoff Levand2832a812006-11-23 00:46:56 +0100323{
324 int result;
325 unsigned long outlet;
326
327 result = lv1_construct_event_receive_port(&outlet);
328
329 if (result) {
330 pr_debug("%s:%d: lv1_construct_event_receive_port failed: %s\n",
331 __func__, __LINE__, ps3_result(result));
332 *virq = NO_IRQ;
333 return result;
334 }
335
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000336 result = ps3_irq_plug_setup(cpu, outlet, virq);
Geoff Levand861be322007-01-26 19:08:08 -0800337 BUG_ON(result);
Geoff Levand2832a812006-11-23 00:46:56 +0100338
Geoff Levand861be322007-01-26 19:08:08 -0800339 return result;
Geoff Levand2832a812006-11-23 00:46:56 +0100340}
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000341EXPORT_SYMBOL_GPL(ps3_event_receive_port_setup);
Geoff Levand2832a812006-11-23 00:46:56 +0100342
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000343/**
344 * ps3_event_receive_port_destroy - Destroy an event receive port.
345 * @virq: The assigned Linux virq.
346 *
347 * Since ps3_event_receive_port_destroy destroys the receive port outlet,
348 * SB devices need to call disconnect_interrupt_event_receive_port() before
349 * this.
350 */
351
352int ps3_event_receive_port_destroy(unsigned int virq)
Geoff Levand2832a812006-11-23 00:46:56 +0100353{
354 int result;
355
Geoff Levand9263e852007-06-16 07:19:32 +1000356 pr_debug(" -> %s:%d virq %u\n", __func__, __LINE__, virq);
357
358 ps3_chip_mask(virq);
Geoff Levand2832a812006-11-23 00:46:56 +0100359
360 result = lv1_destruct_event_receive_port(virq_to_hw(virq));
361
362 if (result)
363 pr_debug("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
364 __func__, __LINE__, ps3_result(result));
365
Geoff Levand9263e852007-06-16 07:19:32 +1000366 /*
367 * Don't call ps3_virq_destroy() here since ps3_smp_cleanup_cpu()
368 * calls from interrupt context (smp_call_function) when kexecing.
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000369 */
370
Geoff Levand2832a812006-11-23 00:46:56 +0100371 pr_debug(" <- %s:%d\n", __func__, __LINE__);
372 return result;
373}
374
375int ps3_send_event_locally(unsigned int virq)
376{
377 return lv1_send_event_locally(virq_to_hw(virq));
378}
379
380/**
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000381 * ps3_sb_event_receive_port_setup - Setup a system bus event receive port.
Geoff Levand861be322007-01-26 19:08:08 -0800382 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
383 * serviced on.
Geoff Levand6bb5cf12007-06-16 07:52:02 +1000384 * @dev: The system bus device instance.
Geoff Levand2832a812006-11-23 00:46:56 +0100385 * @virq: The assigned Linux virq.
386 *
387 * An event irq represents a virtual device interrupt. The interrupt_id
388 * coresponds to the software interrupt number.
389 */
390
Geoff Levand6bb5cf12007-06-16 07:52:02 +1000391int ps3_sb_event_receive_port_setup(struct ps3_system_bus_device *dev,
392 enum ps3_cpu_binding cpu, unsigned int *virq)
Geoff Levand2832a812006-11-23 00:46:56 +0100393{
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000394 /* this should go in system-bus.c */
395
Geoff Levand2832a812006-11-23 00:46:56 +0100396 int result;
397
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000398 result = ps3_event_receive_port_setup(cpu, virq);
Geoff Levand2832a812006-11-23 00:46:56 +0100399
400 if (result)
401 return result;
402
Geoff Levand6bb5cf12007-06-16 07:52:02 +1000403 result = lv1_connect_interrupt_event_receive_port(dev->bus_id,
404 dev->dev_id, virq_to_hw(*virq), dev->interrupt_id);
Geoff Levand2832a812006-11-23 00:46:56 +0100405
406 if (result) {
407 pr_debug("%s:%d: lv1_connect_interrupt_event_receive_port"
408 " failed: %s\n", __func__, __LINE__,
409 ps3_result(result));
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000410 ps3_event_receive_port_destroy(*virq);
Geoff Levand2832a812006-11-23 00:46:56 +0100411 *virq = NO_IRQ;
412 return result;
413 }
414
415 pr_debug("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
Geoff Levand6bb5cf12007-06-16 07:52:02 +1000416 dev->interrupt_id, *virq);
Geoff Levand2832a812006-11-23 00:46:56 +0100417
418 return 0;
419}
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000420EXPORT_SYMBOL(ps3_sb_event_receive_port_setup);
Geoff Levand2832a812006-11-23 00:46:56 +0100421
Geoff Levand6bb5cf12007-06-16 07:52:02 +1000422int ps3_sb_event_receive_port_destroy(struct ps3_system_bus_device *dev,
423 unsigned int virq)
Geoff Levand2832a812006-11-23 00:46:56 +0100424{
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000425 /* this should go in system-bus.c */
426
Geoff Levand2832a812006-11-23 00:46:56 +0100427 int result;
428
429 pr_debug(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
Geoff Levand6bb5cf12007-06-16 07:52:02 +1000430 dev->interrupt_id, virq);
Geoff Levand2832a812006-11-23 00:46:56 +0100431
Geoff Levand6bb5cf12007-06-16 07:52:02 +1000432 result = lv1_disconnect_interrupt_event_receive_port(dev->bus_id,
433 dev->dev_id, virq_to_hw(virq), dev->interrupt_id);
Geoff Levand2832a812006-11-23 00:46:56 +0100434
435 if (result)
436 pr_debug("%s:%d: lv1_disconnect_interrupt_event_receive_port"
437 " failed: %s\n", __func__, __LINE__,
438 ps3_result(result));
439
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000440 result = ps3_event_receive_port_destroy(virq);
441 BUG_ON(result);
Geoff Levand2832a812006-11-23 00:46:56 +0100442
Geoff Levand9263e852007-06-16 07:19:32 +1000443 /*
444 * ps3_event_receive_port_destroy() destroys the IRQ plug,
445 * so don't call ps3_irq_plug_destroy() here.
446 */
447
448 result = ps3_virq_destroy(virq);
449 BUG_ON(result);
450
Geoff Levand2832a812006-11-23 00:46:56 +0100451 pr_debug(" <- %s:%d\n", __func__, __LINE__);
452 return result;
453}
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000454EXPORT_SYMBOL(ps3_sb_event_receive_port_destroy);
Geoff Levand2832a812006-11-23 00:46:56 +0100455
456/**
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000457 * ps3_io_irq_setup - Setup a system bus io irq.
458 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
459 * serviced on.
460 * @interrupt_id: The device interrupt id read from the system repository.
461 * @virq: The assigned Linux virq.
462 *
463 * An io irq represents a non-virtualized device interrupt. interrupt_id
464 * coresponds to the interrupt number of the interrupt controller.
465 */
466
467int ps3_io_irq_setup(enum ps3_cpu_binding cpu, unsigned int interrupt_id,
468 unsigned int *virq)
469{
470 int result;
471 unsigned long outlet;
472
473 result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
474
475 if (result) {
476 pr_debug("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
477 __func__, __LINE__, ps3_result(result));
478 return result;
479 }
480
481 result = ps3_irq_plug_setup(cpu, outlet, virq);
482 BUG_ON(result);
483
484 return result;
485}
486EXPORT_SYMBOL_GPL(ps3_io_irq_setup);
487
488int ps3_io_irq_destroy(unsigned int virq)
489{
490 int result;
Geoff Levand9263e852007-06-16 07:19:32 +1000491 unsigned long outlet = virq_to_hw(virq);
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000492
Geoff Levand9263e852007-06-16 07:19:32 +1000493 ps3_chip_mask(virq);
494
495 /*
496 * lv1_destruct_io_irq_outlet() will destroy the IRQ plug,
497 * so call ps3_irq_plug_destroy() first.
498 */
499
500 result = ps3_irq_plug_destroy(virq);
501 BUG_ON(result);
502
503 result = lv1_destruct_io_irq_outlet(outlet);
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000504
505 if (result)
506 pr_debug("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
507 __func__, __LINE__, ps3_result(result));
508
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000509 return result;
510}
511EXPORT_SYMBOL_GPL(ps3_io_irq_destroy);
512
513/**
514 * ps3_vuart_irq_setup - Setup the system virtual uart virq.
Geoff Levand861be322007-01-26 19:08:08 -0800515 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
516 * serviced on.
Geoff Levand2832a812006-11-23 00:46:56 +0100517 * @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap.
518 * @virq: The assigned Linux virq.
519 *
520 * The system supports only a single virtual uart, so multiple calls without
521 * freeing the interrupt will return a wrong state error.
522 */
523
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000524int ps3_vuart_irq_setup(enum ps3_cpu_binding cpu, void* virt_addr_bmp,
Geoff Levand861be322007-01-26 19:08:08 -0800525 unsigned int *virq)
Geoff Levand2832a812006-11-23 00:46:56 +0100526{
527 int result;
528 unsigned long outlet;
Geoff Levand861be322007-01-26 19:08:08 -0800529 u64 lpar_addr;
Geoff Levand2832a812006-11-23 00:46:56 +0100530
Geoff Levand861be322007-01-26 19:08:08 -0800531 BUG_ON(!is_kernel_addr((u64)virt_addr_bmp));
Geoff Levand2832a812006-11-23 00:46:56 +0100532
533 lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp));
534
535 result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet);
536
537 if (result) {
538 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
539 __func__, __LINE__, ps3_result(result));
540 return result;
541 }
542
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000543 result = ps3_irq_plug_setup(cpu, outlet, virq);
Geoff Levand861be322007-01-26 19:08:08 -0800544 BUG_ON(result);
Geoff Levand2832a812006-11-23 00:46:56 +0100545
Geoff Levand861be322007-01-26 19:08:08 -0800546 return result;
Geoff Levand2832a812006-11-23 00:46:56 +0100547}
Geoff Levand7626e782007-06-16 08:01:06 +1000548EXPORT_SYMBOL_GPL(ps3_vuart_irq_setup);
Geoff Levand2832a812006-11-23 00:46:56 +0100549
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000550int ps3_vuart_irq_destroy(unsigned int virq)
Geoff Levand2832a812006-11-23 00:46:56 +0100551{
552 int result;
553
Geoff Levand9263e852007-06-16 07:19:32 +1000554 ps3_chip_mask(virq);
Geoff Levand2832a812006-11-23 00:46:56 +0100555 result = lv1_deconfigure_virtual_uart_irq();
556
557 if (result) {
558 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
559 __func__, __LINE__, ps3_result(result));
560 return result;
561 }
562
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000563 result = ps3_irq_plug_destroy(virq);
564 BUG_ON(result);
Geoff Levand2832a812006-11-23 00:46:56 +0100565
566 return result;
567}
Geoff Levand7626e782007-06-16 08:01:06 +1000568EXPORT_SYMBOL_GPL(ps3_vuart_irq_destroy);
Geoff Levand2832a812006-11-23 00:46:56 +0100569
570/**
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000571 * ps3_spe_irq_setup - Setup an spe virq.
Geoff Levand861be322007-01-26 19:08:08 -0800572 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
573 * serviced on.
Geoff Levand2832a812006-11-23 00:46:56 +0100574 * @spe_id: The spe_id returned from lv1_construct_logical_spe().
575 * @class: The spe interrupt class {0,1,2}.
576 * @virq: The assigned Linux virq.
577 *
578 */
579
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000580int ps3_spe_irq_setup(enum ps3_cpu_binding cpu, unsigned long spe_id,
Geoff Levand861be322007-01-26 19:08:08 -0800581 unsigned int class, unsigned int *virq)
Geoff Levand2832a812006-11-23 00:46:56 +0100582{
583 int result;
584 unsigned long outlet;
585
586 BUG_ON(class > 2);
587
588 result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
589
590 if (result) {
591 pr_debug("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
592 __func__, __LINE__, ps3_result(result));
593 return result;
594 }
595
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000596 result = ps3_irq_plug_setup(cpu, outlet, virq);
Geoff Levand861be322007-01-26 19:08:08 -0800597 BUG_ON(result);
Geoff Levand2832a812006-11-23 00:46:56 +0100598
Geoff Levand861be322007-01-26 19:08:08 -0800599 return result;
Geoff Levand2832a812006-11-23 00:46:56 +0100600}
601
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000602int ps3_spe_irq_destroy(unsigned int virq)
Geoff Levand2832a812006-11-23 00:46:56 +0100603{
Geoff Levand9263e852007-06-16 07:19:32 +1000604 int result;
605
606 ps3_chip_mask(virq);
607
608 result = ps3_irq_plug_destroy(virq);
Geoff Levanddc4f60c2007-05-01 07:01:01 +1000609 BUG_ON(result);
Geoff Levand9263e852007-06-16 07:19:32 +1000610
611 return result;
Geoff Levand2832a812006-11-23 00:46:56 +0100612}
613
Geert Uytterhoevenb1eeb382007-01-26 19:08:12 -0800614
Geoff Levand2832a812006-11-23 00:46:56 +0100615#define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
616#define PS3_PLUG_MAX 63
617
Geoff Levand2832a812006-11-23 00:46:56 +0100618#if defined(DEBUG)
Geoff Levand861be322007-01-26 19:08:08 -0800619static void _dump_64_bmp(const char *header, const u64 *p, unsigned cpu,
Geoff Levand2832a812006-11-23 00:46:56 +0100620 const char* func, int line)
621{
622 pr_debug("%s:%d: %s %u {%04lx_%04lx_%04lx_%04lx}\n",
623 func, line, header, cpu,
624 *p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff,
625 *p & 0xffff);
626}
627
Geoff Levand848cfdc2007-06-16 07:18:14 +1000628static void __maybe_unused _dump_256_bmp(const char *header,
Geoff Levand861be322007-01-26 19:08:08 -0800629 const u64 *p, unsigned cpu, const char* func, int line)
Geoff Levand2832a812006-11-23 00:46:56 +0100630{
631 pr_debug("%s:%d: %s %u {%016lx:%016lx:%016lx:%016lx}\n",
632 func, line, header, cpu, p[0], p[1], p[2], p[3]);
633}
634
635#define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
Geoff Levand9633ac82007-01-26 19:07:59 -0800636static void _dump_bmp(struct ps3_private* pd, const char* func, int line)
Geoff Levand2832a812006-11-23 00:46:56 +0100637{
638 unsigned long flags;
639
640 spin_lock_irqsave(&pd->bmp.lock, flags);
Geoff Levandaab83502007-06-16 08:06:04 +1000641 _dump_64_bmp("stat", &pd->bmp.status, pd->thread_id, func, line);
642 _dump_64_bmp("mask", &pd->bmp.mask, pd->thread_id, func, line);
Geoff Levand2832a812006-11-23 00:46:56 +0100643 spin_unlock_irqrestore(&pd->bmp.lock, flags);
644}
645
646#define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
Geoff Levand848cfdc2007-06-16 07:18:14 +1000647static void __maybe_unused _dump_mask(struct ps3_private *pd,
Geoff Levand2832a812006-11-23 00:46:56 +0100648 const char* func, int line)
649{
650 unsigned long flags;
651
652 spin_lock_irqsave(&pd->bmp.lock, flags);
Geoff Levandaab83502007-06-16 08:06:04 +1000653 _dump_64_bmp("mask", &pd->bmp.mask, pd->thread_id, func, line);
Geoff Levand2832a812006-11-23 00:46:56 +0100654 spin_unlock_irqrestore(&pd->bmp.lock, flags);
655}
656#else
Geoff Levand9633ac82007-01-26 19:07:59 -0800657static void dump_bmp(struct ps3_private* pd) {};
Geoff Levand2832a812006-11-23 00:46:56 +0100658#endif /* defined(DEBUG) */
659
Geoff Levand9633ac82007-01-26 19:07:59 -0800660static void ps3_host_unmap(struct irq_host *h, unsigned int virq)
Geoff Levand2832a812006-11-23 00:46:56 +0100661{
Geoff Levand861be322007-01-26 19:08:08 -0800662 set_irq_chip_data(virq, NULL);
Geoff Levand2832a812006-11-23 00:46:56 +0100663}
664
Geoff Levand9633ac82007-01-26 19:07:59 -0800665static int ps3_host_map(struct irq_host *h, unsigned int virq,
Geoff Levand2832a812006-11-23 00:46:56 +0100666 irq_hw_number_t hwirq)
667{
Geoff Levand861be322007-01-26 19:08:08 -0800668 pr_debug("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq,
669 virq);
Geoff Levand2832a812006-11-23 00:46:56 +0100670
Geoff Levand9263e852007-06-16 07:19:32 +1000671 set_irq_chip_and_handler(virq, &ps3_irq_chip, handle_fasteoi_irq);
Geoff Levand2832a812006-11-23 00:46:56 +0100672
Geoff Levand861be322007-01-26 19:08:08 -0800673 return 0;
Geoff Levand2832a812006-11-23 00:46:56 +0100674}
675
Michael Ellerman8528ab82007-08-28 18:47:55 +1000676static int ps3_host_match(struct irq_host *h, struct device_node *np)
677{
678 /* Match all */
679 return 1;
680}
681
Geoff Levand9633ac82007-01-26 19:07:59 -0800682static struct irq_host_ops ps3_host_ops = {
683 .map = ps3_host_map,
684 .unmap = ps3_host_unmap,
Michael Ellerman8528ab82007-08-28 18:47:55 +1000685 .match = ps3_host_match,
Geoff Levand2832a812006-11-23 00:46:56 +0100686};
687
688void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
689{
Geoff Levand9633ac82007-01-26 19:07:59 -0800690 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
Geoff Levand2832a812006-11-23 00:46:56 +0100691
692 pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq;
693
694 pr_debug("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__,
695 cpu, virq, pd->bmp.ipi_debug_brk_mask);
696}
697
Geoff Levand9263e852007-06-16 07:19:32 +1000698static unsigned int ps3_get_irq(void)
Geoff Levand2832a812006-11-23 00:46:56 +0100699{
Benjamin Herrenschmidt9cf9e192007-01-26 19:08:05 -0800700 struct ps3_private *pd = &__get_cpu_var(ps3_private);
Geoff Levand861be322007-01-26 19:08:08 -0800701 u64 x = (pd->bmp.status & pd->bmp.mask);
Benjamin Herrenschmidt9cf9e192007-01-26 19:08:05 -0800702 unsigned int plug;
Geoff Levand2832a812006-11-23 00:46:56 +0100703
704 /* check for ipi break first to stop this cpu ASAP */
705
Benjamin Herrenschmidt9cf9e192007-01-26 19:08:05 -0800706 if (x & pd->bmp.ipi_debug_brk_mask)
707 x &= pd->bmp.ipi_debug_brk_mask;
Geoff Levand2832a812006-11-23 00:46:56 +0100708
Benjamin Herrenschmidt9cf9e192007-01-26 19:08:05 -0800709 asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x));
710 plug &= 0x3f;
Geoff Levand2832a812006-11-23 00:46:56 +0100711
Benjamin Herrenschmidt9cf9e192007-01-26 19:08:05 -0800712 if (unlikely(plug) == NO_IRQ) {
Geoff Levandaab83502007-06-16 08:06:04 +1000713 pr_debug("%s:%d: no plug found: thread_id %lu\n", __func__,
714 __LINE__, pd->thread_id);
Geoff Levand9633ac82007-01-26 19:07:59 -0800715 dump_bmp(&per_cpu(ps3_private, 0));
716 dump_bmp(&per_cpu(ps3_private, 1));
Geoff Levand2832a812006-11-23 00:46:56 +0100717 return NO_IRQ;
718 }
719
720#if defined(DEBUG)
Benjamin Herrenschmidt9cf9e192007-01-26 19:08:05 -0800721 if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) {
Geoff Levand9633ac82007-01-26 19:07:59 -0800722 dump_bmp(&per_cpu(ps3_private, 0));
723 dump_bmp(&per_cpu(ps3_private, 1));
Geoff Levand2832a812006-11-23 00:46:56 +0100724 BUG();
725 }
726#endif
727 return plug;
728}
729
730void __init ps3_init_IRQ(void)
731{
732 int result;
Geoff Levand2832a812006-11-23 00:46:56 +0100733 unsigned cpu;
734 struct irq_host *host;
735
Michael Ellerman52964f82007-08-28 18:47:54 +1000736 host = irq_alloc_host(NULL, IRQ_HOST_MAP_NOMAP, 0, &ps3_host_ops,
Geoff Levand2832a812006-11-23 00:46:56 +0100737 PS3_INVALID_OUTLET);
738 irq_set_default_host(host);
739 irq_set_virq_count(PS3_PLUG_MAX + 1);
740
741 for_each_possible_cpu(cpu) {
Geoff Levand9633ac82007-01-26 19:07:59 -0800742 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
Geoff Levand2832a812006-11-23 00:46:56 +0100743
Geoff Levandaab83502007-06-16 08:06:04 +1000744 lv1_get_logical_ppe_id(&pd->ppe_id);
745 pd->thread_id = get_hard_smp_processor_id(cpu);
Geoff Levand2832a812006-11-23 00:46:56 +0100746 spin_lock_init(&pd->bmp.lock);
747
Geoff Levandaab83502007-06-16 08:06:04 +1000748 pr_debug("%s:%d: ppe_id %lu, thread_id %lu, bmp %lxh\n",
749 __func__, __LINE__, pd->ppe_id, pd->thread_id,
Geoff Levand407e24a2007-01-26 19:08:02 -0800750 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
751
Geoff Levandaab83502007-06-16 08:06:04 +1000752 result = lv1_configure_irq_state_bitmap(pd->ppe_id,
753 pd->thread_id, ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
Geoff Levand2832a812006-11-23 00:46:56 +0100754
755 if (result)
756 pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
757 " %s\n", __func__, __LINE__,
758 ps3_result(result));
759 }
760
761 ppc_md.get_irq = ps3_get_irq;
762}
Geoff Levand9263e852007-06-16 07:19:32 +1000763
764void ps3_shutdown_IRQ(int cpu)
765{
766 int result;
767 u64 ppe_id;
768 u64 thread_id = get_hard_smp_processor_id(cpu);
769
770 lv1_get_logical_ppe_id(&ppe_id);
771 result = lv1_configure_irq_state_bitmap(ppe_id, thread_id, 0);
772
773 DBG("%s:%d: lv1_configure_irq_state_bitmap (%lu:%lu/%d) %s\n", __func__,
774 __LINE__, ppe_id, thread_id, cpu, ps3_result(result));
775}