2 * PS3 interrupt routines.
4 * Copyright (C) 2006 Sony Computer Entertainment Inc.
5 * Copyright 2006 Sony Corp.
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.
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.
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
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/irq.h>
25 #include <asm/machdep.h>
28 #include <asm/lv1call.h>
33 #define DBG(fmt...) udbg_printf(fmt)
35 #define DBG(fmt...) do{if(0)printk(fmt);}while(0)
39 * ps3_alloc_io_irq - Assign a virq to a system bus device.
40 * interrupt_id: The device interrupt id read from the system repository.
41 * @virq: The assigned Linux virq.
43 * An io irq represents a non-virtualized device interrupt. interrupt_id
44 * coresponds to the interrupt number of the interrupt controller.
47 int ps3_alloc_io_irq(unsigned int interrupt_id, unsigned int *virq)
52 result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
55 pr_debug("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
56 __func__, __LINE__, ps3_result(result));
60 *virq = irq_create_mapping(NULL, outlet);
62 pr_debug("%s:%d: interrupt_id %u => outlet %lu, virq %u\n",
63 __func__, __LINE__, interrupt_id, outlet, *virq);
68 int ps3_free_io_irq(unsigned int virq)
72 result = lv1_destruct_io_irq_outlet(virq_to_hw(virq));
75 pr_debug("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
76 __func__, __LINE__, ps3_result(result));
78 irq_dispose_mapping(virq);
84 * ps3_alloc_event_irq - Allocate a virq for use with a system event.
85 * @virq: The assigned Linux virq.
87 * The virq can be used with lv1_connect_interrupt_event_receive_port() to
88 * arrange to receive events, or with ps3_send_event_locally() to signal
92 int ps3_alloc_event_irq(unsigned int *virq)
97 result = lv1_construct_event_receive_port(&outlet);
100 pr_debug("%s:%d: lv1_construct_event_receive_port failed: %s\n",
101 __func__, __LINE__, ps3_result(result));
106 *virq = irq_create_mapping(NULL, outlet);
108 pr_debug("%s:%d: outlet %lu, virq %u\n", __func__, __LINE__, outlet,
114 int ps3_free_event_irq(unsigned int virq)
118 pr_debug(" -> %s:%d\n", __func__, __LINE__);
120 result = lv1_destruct_event_receive_port(virq_to_hw(virq));
123 pr_debug("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
124 __func__, __LINE__, ps3_result(result));
126 irq_dispose_mapping(virq);
128 pr_debug(" <- %s:%d\n", __func__, __LINE__);
132 int ps3_send_event_locally(unsigned int virq)
134 return lv1_send_event_locally(virq_to_hw(virq));
138 * ps3_connect_event_irq - Assign a virq to a system bus device.
139 * @did: The HV device identifier read from the system repository.
140 * @interrupt_id: The device interrupt id read from the system repository.
141 * @virq: The assigned Linux virq.
143 * An event irq represents a virtual device interrupt. The interrupt_id
144 * coresponds to the software interrupt number.
147 int ps3_connect_event_irq(const struct ps3_device_id *did,
148 unsigned int interrupt_id, unsigned int *virq)
152 result = ps3_alloc_event_irq(virq);
157 result = lv1_connect_interrupt_event_receive_port(did->bus_id,
158 did->dev_id, virq_to_hw(*virq), interrupt_id);
161 pr_debug("%s:%d: lv1_connect_interrupt_event_receive_port"
162 " failed: %s\n", __func__, __LINE__,
164 ps3_free_event_irq(*virq);
169 pr_debug("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
170 interrupt_id, *virq);
175 int ps3_disconnect_event_irq(const struct ps3_device_id *did,
176 unsigned int interrupt_id, unsigned int virq)
180 pr_debug(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
183 result = lv1_disconnect_interrupt_event_receive_port(did->bus_id,
184 did->dev_id, virq_to_hw(virq), interrupt_id);
187 pr_debug("%s:%d: lv1_disconnect_interrupt_event_receive_port"
188 " failed: %s\n", __func__, __LINE__,
191 ps3_free_event_irq(virq);
193 pr_debug(" <- %s:%d\n", __func__, __LINE__);
198 * ps3_alloc_vuart_irq - Configure the system virtual uart virq.
199 * @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap.
200 * @virq: The assigned Linux virq.
202 * The system supports only a single virtual uart, so multiple calls without
203 * freeing the interrupt will return a wrong state error.
206 int ps3_alloc_vuart_irq(void* virt_addr_bmp, unsigned int *virq)
209 unsigned long outlet;
210 unsigned long lpar_addr;
212 BUG_ON(!is_kernel_addr((unsigned long)virt_addr_bmp));
214 lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp));
216 result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet);
219 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
220 __func__, __LINE__, ps3_result(result));
224 *virq = irq_create_mapping(NULL, outlet);
226 pr_debug("%s:%d: outlet %lu, virq %u\n", __func__, __LINE__,
232 int ps3_free_vuart_irq(unsigned int virq)
236 result = lv1_deconfigure_virtual_uart_irq();
239 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
240 __func__, __LINE__, ps3_result(result));
244 irq_dispose_mapping(virq);
250 * ps3_alloc_spe_irq - Configure an spe virq.
251 * @spe_id: The spe_id returned from lv1_construct_logical_spe().
252 * @class: The spe interrupt class {0,1,2}.
253 * @virq: The assigned Linux virq.
257 int ps3_alloc_spe_irq(unsigned long spe_id, unsigned int class,
261 unsigned long outlet;
265 result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
268 pr_debug("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
269 __func__, __LINE__, ps3_result(result));
273 *virq = irq_create_mapping(NULL, outlet);
275 pr_debug("%s:%d: spe_id %lu, class %u, outlet %lu, virq %u\n",
276 __func__, __LINE__, spe_id, class, outlet, *virq);
281 int ps3_free_spe_irq(unsigned int virq)
283 irq_dispose_mapping(virq);
287 #define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
288 #define PS3_PLUG_MAX 63
291 * struct ps3_bmp - a per cpu irq status and mask bitmap structure
292 * @status: 256 bit status bitmap indexed by plug
294 * @mask: 256 bit mask bitmap indexed by plug
297 * @ipi_debug_brk_mask:
299 * The HV mantains per SMT thread mappings of HV outlet to HV plug on
300 * behalf of the guest. These mappings are implemented as 256 bit guest
301 * supplied bitmaps indexed by plug number. The address of the bitmaps are
302 * registered with the HV through lv1_configure_irq_state_bitmap().
304 * The HV supports 256 plugs per thread, assigned as {0..255}, for a total
305 * of 512 plugs supported on a processor. To simplify the logic this
306 * implementation equates HV plug value to linux virq value, constrains each
307 * interrupt to have a system wide unique plug number, and limits the range
308 * of the plug values to map into the first dword of the bitmaps. This
309 * gives a usable range of plug values of {NUM_ISA_INTERRUPTS..63}. Note
310 * that there is no constraint on how many in this set an individual thread
316 unsigned long status;
317 unsigned long unused_1[3];
319 unsigned long unused_2[3];
320 } __attribute__ ((aligned (64)));
323 unsigned long ipi_debug_brk_mask;
327 * struct ps3_private - a per cpu data structure
328 * @bmp: ps3_bmp structure
329 * @node: HV logical_ppe_id
340 static void _dump_64_bmp(const char *header, const unsigned long *p, unsigned cpu,
341 const char* func, int line)
343 pr_debug("%s:%d: %s %u {%04lx_%04lx_%04lx_%04lx}\n",
344 func, line, header, cpu,
345 *p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff,
349 static void __attribute__ ((unused)) _dump_256_bmp(const char *header,
350 const unsigned long *p, unsigned cpu, const char* func, int line)
352 pr_debug("%s:%d: %s %u {%016lx:%016lx:%016lx:%016lx}\n",
353 func, line, header, cpu, p[0], p[1], p[2], p[3]);
356 #define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
357 static void _dump_bmp(struct ps3_private* pd, const char* func, int line)
361 spin_lock_irqsave(&pd->bmp.lock, flags);
362 _dump_64_bmp("stat", &pd->bmp.status, pd->cpu, func, line);
363 _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
364 spin_unlock_irqrestore(&pd->bmp.lock, flags);
367 #define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
368 static void __attribute__ ((unused)) _dump_mask(struct ps3_private* pd,
369 const char* func, int line)
373 spin_lock_irqsave(&pd->bmp.lock, flags);
374 _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
375 spin_unlock_irqrestore(&pd->bmp.lock, flags);
378 static void dump_bmp(struct ps3_private* pd) {};
379 #endif /* defined(DEBUG) */
381 static void ps3_chip_mask(unsigned int virq)
384 struct ps3_private *pd = get_irq_chip_data(virq);
386 pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
388 BUG_ON(virq < NUM_ISA_INTERRUPTS);
389 BUG_ON(virq > PS3_PLUG_MAX);
391 spin_lock_irqsave(&pd->bmp.lock, flags);
392 pd->bmp.mask &= ~(0x8000000000000000UL >> virq);
393 lv1_did_update_interrupt_mask(pd->node, pd->cpu);
394 spin_unlock_irqrestore(&pd->bmp.lock, flags);
397 static void ps3_chip_unmask(unsigned int virq)
400 struct ps3_private *pd = get_irq_chip_data(virq);
402 pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
404 BUG_ON(virq < NUM_ISA_INTERRUPTS);
405 BUG_ON(virq > PS3_PLUG_MAX);
407 spin_lock_irqsave(&pd->bmp.lock, flags);
408 pd->bmp.mask |= (0x8000000000000000UL >> virq);
409 lv1_did_update_interrupt_mask(pd->node, pd->cpu);
410 spin_unlock_irqrestore(&pd->bmp.lock, flags);
413 static void ps3_chip_eoi(unsigned int virq)
415 const struct ps3_private *pd = get_irq_chip_data(virq);
416 lv1_end_of_interrupt_ext(pd->node, pd->cpu, virq);
419 static struct irq_chip irq_chip = {
421 .mask = ps3_chip_mask,
422 .unmask = ps3_chip_unmask,
426 static void ps3_host_unmap(struct irq_host *h, unsigned int virq)
429 const struct ps3_private *pd = get_irq_chip_data(virq);
431 pr_debug("%s:%d: node %lu, cpu %d, virq %u\n", __func__, __LINE__,
432 pd->node, pd->cpu, virq);
434 lv1_disconnect_irq_plug_ext(pd->node, pd->cpu, virq);
436 result = set_irq_chip_data(virq, NULL);
440 static DEFINE_PER_CPU(struct ps3_private, ps3_private);
442 static int ps3_host_map(struct irq_host *h, unsigned int virq,
443 irq_hw_number_t hwirq)
446 struct ps3_private *pd = &__get_cpu_var(ps3_private);
448 pr_debug("%s:%d: node %lu, cpu %d, hwirq %lu => virq %u\n", __func__,
449 __LINE__, pd->node, pd->cpu, hwirq, virq);
451 /* Binds this virq to pd->cpu (current cpu) */
453 result = lv1_connect_irq_plug_ext(pd->node, pd->cpu, virq, hwirq, 0);
456 pr_info("%s:%d: lv1_connect_irq_plug_ext failed:"
457 " %s\n", __func__, __LINE__, ps3_result(result));
461 result = set_irq_chip_data(virq, pd);
464 set_irq_chip_and_handler(virq, &irq_chip, handle_fasteoi_irq);
469 static struct irq_host_ops ps3_host_ops = {
471 .unmap = ps3_host_unmap,
474 void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
476 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
478 pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq;
480 pr_debug("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__,
481 cpu, virq, pd->bmp.ipi_debug_brk_mask);
484 static int bmp_get_and_clear_status_bit(struct ps3_bmp *m)
490 spin_lock_irqsave(&m->lock, flags);
492 /* check for ipi break first to stop this cpu ASAP */
494 if (m->status & m->ipi_debug_brk_mask) {
495 m->status &= ~m->ipi_debug_brk_mask;
496 spin_unlock_irqrestore(&m->lock, flags);
497 return __ilog2(m->ipi_debug_brk_mask);
500 x = (m->status & m->mask);
502 for (bit = NUM_ISA_INTERRUPTS, x <<= bit; x; bit++, x <<= 1)
503 if (x & 0x8000000000000000UL) {
504 m->status &= ~(0x8000000000000000UL >> bit);
505 spin_unlock_irqrestore(&m->lock, flags);
509 spin_unlock_irqrestore(&m->lock, flags);
511 pr_debug("%s:%d: not found\n", __func__, __LINE__);
515 unsigned int ps3_get_irq(void)
519 struct ps3_private *pd = &__get_cpu_var(ps3_private);
521 plug = bmp_get_and_clear_status_bit(&pd->bmp);
524 pr_debug("%s:%d: no plug found: cpu %u\n", __func__, __LINE__,
526 dump_bmp(&per_cpu(ps3_private, 0));
527 dump_bmp(&per_cpu(ps3_private, 1));
532 if (plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX) {
533 dump_bmp(&per_cpu(ps3_private, 0));
534 dump_bmp(&per_cpu(ps3_private, 1));
541 void __init ps3_init_IRQ(void)
545 struct irq_host *host;
547 host = irq_alloc_host(IRQ_HOST_MAP_NOMAP, 0, &ps3_host_ops,
549 irq_set_default_host(host);
550 irq_set_virq_count(PS3_PLUG_MAX + 1);
552 for_each_possible_cpu(cpu) {
553 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
555 lv1_get_logical_ppe_id(&pd->node);
556 pd->cpu = get_hard_smp_processor_id(cpu);
557 spin_lock_init(&pd->bmp.lock);
559 pr_debug("%s:%d: node %lu, cpu %d, bmp %lxh\n", __func__,
560 __LINE__, pd->node, pd->cpu,
561 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
563 result = lv1_configure_irq_state_bitmap(pd->node, pd->cpu,
564 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
567 pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
568 " %s\n", __func__, __LINE__,
572 ppc_md.get_irq = ps3_get_irq;