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>
27 #include <asm/lv1call.h>
32 #define DBG(fmt...) udbg_printf(fmt)
34 #define DBG(fmt...) do{if(0)printk(fmt);}while(0)
38 * struct ps3_bmp - a per cpu irq status and mask bitmap structure
39 * @status: 256 bit status bitmap indexed by plug
41 * @mask: 256 bit mask bitmap indexed by plug
44 * @ipi_debug_brk_mask:
46 * The HV mantains per SMT thread mappings of HV outlet to HV plug on
47 * behalf of the guest. These mappings are implemented as 256 bit guest
48 * supplied bitmaps indexed by plug number. The addresses of the bitmaps
49 * are registered with the HV through lv1_configure_irq_state_bitmap().
50 * The HV requires that the 512 bits of status + mask not cross a page
51 * boundary. PS3_BMP_MINALIGN is used to define this minimal 64 byte
54 * The HV supports 256 plugs per thread, assigned as {0..255}, for a total
55 * of 512 plugs supported on a processor. To simplify the logic this
56 * implementation equates HV plug value to Linux virq value, constrains each
57 * interrupt to have a system wide unique plug number, and limits the range
58 * of the plug values to map into the first dword of the bitmaps. This
59 * gives a usable range of plug values of {NUM_ISA_INTERRUPTS..63}. Note
60 * that there is no constraint on how many in this set an individual thread
64 #define PS3_BMP_MINALIGN 64
73 u64 ipi_debug_brk_mask;
78 * struct ps3_private - a per cpu data structure
79 * @bmp: ps3_bmp structure
80 * @node: HV logical_ppe_id
85 struct ps3_bmp bmp __attribute__ ((aligned (PS3_BMP_MINALIGN)));
90 static DEFINE_PER_CPU(struct ps3_private, ps3_private);
92 int ps3_alloc_irq(enum ps3_cpu_binding cpu, unsigned long outlet,
96 struct ps3_private *pd;
98 /* This defines the default interrupt distribution policy. */
100 if (cpu == PS3_BINDING_CPU_ANY)
103 pd = &per_cpu(ps3_private, cpu);
105 *virq = irq_create_mapping(NULL, outlet);
107 if (*virq == NO_IRQ) {
108 pr_debug("%s:%d: irq_create_mapping failed: outlet %lu\n",
109 __func__, __LINE__, outlet);
114 /* Binds outlet to cpu + virq. */
116 result = lv1_connect_irq_plug_ext(pd->node, pd->cpu, *virq, outlet, 0);
119 pr_info("%s:%d: lv1_connect_irq_plug_ext failed: %s\n",
120 __func__, __LINE__, ps3_result(result));
125 pr_debug("%s:%d: outlet %lu => cpu %u, virq %u\n", __func__, __LINE__,
128 result = set_irq_chip_data(*virq, pd);
131 pr_debug("%s:%d: set_irq_chip_data failed\n",
139 lv1_disconnect_irq_plug_ext(pd->node, pd->cpu, *virq);
141 irq_dispose_mapping(*virq);
145 EXPORT_SYMBOL_GPL(ps3_alloc_irq);
147 int ps3_free_irq(unsigned int virq)
150 const struct ps3_private *pd = get_irq_chip_data(virq);
152 pr_debug("%s:%d: node %lu, cpu %d, virq %u\n", __func__, __LINE__,
153 pd->node, pd->cpu, virq);
155 result = lv1_disconnect_irq_plug_ext(pd->node, pd->cpu, virq);
158 pr_info("%s:%d: lv1_disconnect_irq_plug_ext failed: %s\n",
159 __func__, __LINE__, ps3_result(result));
161 set_irq_chip_data(virq, NULL);
162 irq_dispose_mapping(virq);
165 EXPORT_SYMBOL_GPL(ps3_free_irq);
168 * ps3_alloc_io_irq - Assign a virq to a system bus device.
169 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
171 * @interrupt_id: The device interrupt id read from the system repository.
172 * @virq: The assigned Linux virq.
174 * An io irq represents a non-virtualized device interrupt. interrupt_id
175 * coresponds to the interrupt number of the interrupt controller.
178 int ps3_alloc_io_irq(enum ps3_cpu_binding cpu, unsigned int interrupt_id,
182 unsigned long outlet;
184 result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
187 pr_debug("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
188 __func__, __LINE__, ps3_result(result));
192 result = ps3_alloc_irq(cpu, outlet, virq);
197 EXPORT_SYMBOL_GPL(ps3_alloc_io_irq);
199 int ps3_free_io_irq(unsigned int virq)
203 result = lv1_destruct_io_irq_outlet(virq_to_hw(virq));
206 pr_debug("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
207 __func__, __LINE__, ps3_result(result));
213 EXPORT_SYMBOL_GPL(ps3_free_io_irq);
216 * ps3_alloc_event_irq - Allocate a virq for use with a system event.
217 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
219 * @virq: The assigned Linux virq.
221 * The virq can be used with lv1_connect_interrupt_event_receive_port() to
222 * arrange to receive events, or with ps3_send_event_locally() to signal
226 int ps3_alloc_event_irq(enum ps3_cpu_binding cpu, unsigned int *virq)
229 unsigned long outlet;
231 result = lv1_construct_event_receive_port(&outlet);
234 pr_debug("%s:%d: lv1_construct_event_receive_port failed: %s\n",
235 __func__, __LINE__, ps3_result(result));
240 result = ps3_alloc_irq(cpu, outlet, virq);
246 int ps3_free_event_irq(unsigned int virq)
250 pr_debug(" -> %s:%d\n", __func__, __LINE__);
252 result = lv1_destruct_event_receive_port(virq_to_hw(virq));
255 pr_debug("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
256 __func__, __LINE__, ps3_result(result));
260 pr_debug(" <- %s:%d\n", __func__, __LINE__);
264 int ps3_send_event_locally(unsigned int virq)
266 return lv1_send_event_locally(virq_to_hw(virq));
270 * ps3_connect_event_irq - Assign a virq to a system bus device.
271 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
273 * @did: The HV device identifier read from the system repository.
274 * @interrupt_id: The device interrupt id read from the system repository.
275 * @virq: The assigned Linux virq.
277 * An event irq represents a virtual device interrupt. The interrupt_id
278 * coresponds to the software interrupt number.
281 int ps3_connect_event_irq(enum ps3_cpu_binding cpu,
282 const struct ps3_device_id *did, unsigned int interrupt_id,
287 result = ps3_alloc_event_irq(cpu, virq);
292 result = lv1_connect_interrupt_event_receive_port(did->bus_id,
293 did->dev_id, virq_to_hw(*virq), interrupt_id);
296 pr_debug("%s:%d: lv1_connect_interrupt_event_receive_port"
297 " failed: %s\n", __func__, __LINE__,
299 ps3_free_event_irq(*virq);
304 pr_debug("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
305 interrupt_id, *virq);
310 int ps3_disconnect_event_irq(const struct ps3_device_id *did,
311 unsigned int interrupt_id, unsigned int virq)
315 pr_debug(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
318 result = lv1_disconnect_interrupt_event_receive_port(did->bus_id,
319 did->dev_id, virq_to_hw(virq), interrupt_id);
322 pr_debug("%s:%d: lv1_disconnect_interrupt_event_receive_port"
323 " failed: %s\n", __func__, __LINE__,
326 ps3_free_event_irq(virq);
328 pr_debug(" <- %s:%d\n", __func__, __LINE__);
333 * ps3_alloc_vuart_irq - Configure the system virtual uart virq.
334 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
336 * @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap.
337 * @virq: The assigned Linux virq.
339 * The system supports only a single virtual uart, so multiple calls without
340 * freeing the interrupt will return a wrong state error.
343 int ps3_alloc_vuart_irq(enum ps3_cpu_binding cpu, void* virt_addr_bmp,
347 unsigned long outlet;
350 BUG_ON(!is_kernel_addr((u64)virt_addr_bmp));
352 lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp));
354 result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet);
357 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
358 __func__, __LINE__, ps3_result(result));
362 result = ps3_alloc_irq(cpu, outlet, virq);
368 int ps3_free_vuart_irq(unsigned int virq)
372 result = lv1_deconfigure_virtual_uart_irq();
375 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
376 __func__, __LINE__, ps3_result(result));
386 * ps3_alloc_spe_irq - Configure an spe virq.
387 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
389 * @spe_id: The spe_id returned from lv1_construct_logical_spe().
390 * @class: The spe interrupt class {0,1,2}.
391 * @virq: The assigned Linux virq.
395 int ps3_alloc_spe_irq(enum ps3_cpu_binding cpu, unsigned long spe_id,
396 unsigned int class, unsigned int *virq)
399 unsigned long outlet;
403 result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
406 pr_debug("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
407 __func__, __LINE__, ps3_result(result));
411 result = ps3_alloc_irq(cpu, outlet, virq);
417 int ps3_free_spe_irq(unsigned int virq)
424 #define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
425 #define PS3_PLUG_MAX 63
428 static void _dump_64_bmp(const char *header, const u64 *p, unsigned cpu,
429 const char* func, int line)
431 pr_debug("%s:%d: %s %u {%04lx_%04lx_%04lx_%04lx}\n",
432 func, line, header, cpu,
433 *p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff,
437 static void __attribute__ ((unused)) _dump_256_bmp(const char *header,
438 const u64 *p, unsigned cpu, const char* func, int line)
440 pr_debug("%s:%d: %s %u {%016lx:%016lx:%016lx:%016lx}\n",
441 func, line, header, cpu, p[0], p[1], p[2], p[3]);
444 #define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
445 static void _dump_bmp(struct ps3_private* pd, const char* func, int line)
449 spin_lock_irqsave(&pd->bmp.lock, flags);
450 _dump_64_bmp("stat", &pd->bmp.status, pd->cpu, func, line);
451 _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
452 spin_unlock_irqrestore(&pd->bmp.lock, flags);
455 #define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
456 static void __attribute__ ((unused)) _dump_mask(struct ps3_private* pd,
457 const char* func, int line)
461 spin_lock_irqsave(&pd->bmp.lock, flags);
462 _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
463 spin_unlock_irqrestore(&pd->bmp.lock, flags);
466 static void dump_bmp(struct ps3_private* pd) {};
467 #endif /* defined(DEBUG) */
469 static void ps3_chip_mask(unsigned int virq)
471 struct ps3_private *pd = get_irq_chip_data(virq);
472 u64 bit = 0x8000000000000000UL >> virq;
473 u64 *p = &pd->bmp.mask;
477 pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
479 local_irq_save(flags);
485 : "=&r" (old), "+m" (*p)
489 lv1_did_update_interrupt_mask(pd->node, pd->cpu);
490 local_irq_restore(flags);
493 static void ps3_chip_unmask(unsigned int virq)
495 struct ps3_private *pd = get_irq_chip_data(virq);
496 u64 bit = 0x8000000000000000UL >> virq;
497 u64 *p = &pd->bmp.mask;
501 pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
503 local_irq_save(flags);
509 : "=&r" (old), "+m" (*p)
513 lv1_did_update_interrupt_mask(pd->node, pd->cpu);
514 local_irq_restore(flags);
517 static void ps3_chip_eoi(unsigned int virq)
519 const struct ps3_private *pd = get_irq_chip_data(virq);
520 lv1_end_of_interrupt_ext(pd->node, pd->cpu, virq);
523 static struct irq_chip irq_chip = {
525 .mask = ps3_chip_mask,
526 .unmask = ps3_chip_unmask,
530 static void ps3_host_unmap(struct irq_host *h, unsigned int virq)
532 set_irq_chip_data(virq, NULL);
535 static int ps3_host_map(struct irq_host *h, unsigned int virq,
536 irq_hw_number_t hwirq)
538 pr_debug("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq,
541 set_irq_chip_and_handler(virq, &irq_chip, handle_fasteoi_irq);
546 static struct irq_host_ops ps3_host_ops = {
548 .unmap = ps3_host_unmap,
551 void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
553 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
555 pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq;
557 pr_debug("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__,
558 cpu, virq, pd->bmp.ipi_debug_brk_mask);
561 unsigned int ps3_get_irq(void)
563 struct ps3_private *pd = &__get_cpu_var(ps3_private);
564 u64 x = (pd->bmp.status & pd->bmp.mask);
567 /* check for ipi break first to stop this cpu ASAP */
569 if (x & pd->bmp.ipi_debug_brk_mask)
570 x &= pd->bmp.ipi_debug_brk_mask;
572 asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x));
575 if (unlikely(plug) == NO_IRQ) {
576 pr_debug("%s:%d: no plug found: cpu %u\n", __func__, __LINE__,
578 dump_bmp(&per_cpu(ps3_private, 0));
579 dump_bmp(&per_cpu(ps3_private, 1));
584 if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) {
585 dump_bmp(&per_cpu(ps3_private, 0));
586 dump_bmp(&per_cpu(ps3_private, 1));
593 void __init ps3_init_IRQ(void)
597 struct irq_host *host;
599 host = irq_alloc_host(IRQ_HOST_MAP_NOMAP, 0, &ps3_host_ops,
601 irq_set_default_host(host);
602 irq_set_virq_count(PS3_PLUG_MAX + 1);
604 for_each_possible_cpu(cpu) {
605 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
607 lv1_get_logical_ppe_id(&pd->node);
608 pd->cpu = get_hard_smp_processor_id(cpu);
609 spin_lock_init(&pd->bmp.lock);
611 pr_debug("%s:%d: node %lu, cpu %d, bmp %lxh\n", __func__,
612 __LINE__, pd->node, pd->cpu,
613 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
615 result = lv1_configure_irq_state_bitmap(pd->node, pd->cpu,
616 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
619 pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
620 " %s\n", __func__, __LINE__,
624 ppc_md.get_irq = ps3_get_irq;