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>
33 #define DBG udbg_printf
39 * struct ps3_bmp - a per cpu irq status and mask bitmap structure
40 * @status: 256 bit status bitmap indexed by plug
42 * @mask: 256 bit mask bitmap indexed by plug
45 * @ipi_debug_brk_mask:
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().
51 * 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
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
65 #define PS3_BMP_MINALIGN 64
74 u64 ipi_debug_brk_mask;
79 * struct ps3_private - a per cpu data structure
80 * @bmp: ps3_bmp structure
81 * @ppe_id: HV logical_ppe_id
82 * @thread_id: HV thread_id
86 struct ps3_bmp bmp __attribute__ ((aligned (PS3_BMP_MINALIGN)));
91 static DEFINE_PER_CPU(struct ps3_private, ps3_private);
94 * ps3_chip_mask - Set an interrupt mask bit in ps3_bmp.
95 * @virq: The assigned Linux virq.
97 * Sets ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
100 static void ps3_chip_mask(unsigned int virq)
102 struct ps3_private *pd = get_irq_chip_data(virq);
105 pr_debug("%s:%d: thread_id %lu, virq %d\n", __func__, __LINE__,
106 pd->thread_id, virq);
108 local_irq_save(flags);
109 clear_bit(63 - virq, &pd->bmp.mask);
110 lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
111 local_irq_restore(flags);
115 * ps3_chip_unmask - Clear an interrupt mask bit in ps3_bmp.
116 * @virq: The assigned Linux virq.
118 * Clears ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
121 static void ps3_chip_unmask(unsigned int virq)
123 struct ps3_private *pd = get_irq_chip_data(virq);
126 pr_debug("%s:%d: thread_id %lu, virq %d\n", __func__, __LINE__,
127 pd->thread_id, virq);
129 local_irq_save(flags);
130 set_bit(63 - virq, &pd->bmp.mask);
131 lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
132 local_irq_restore(flags);
136 * ps3_chip_eoi - HV end-of-interrupt.
137 * @virq: The assigned Linux virq.
139 * Calls lv1_end_of_interrupt_ext().
142 static void ps3_chip_eoi(unsigned int virq)
144 const struct ps3_private *pd = get_irq_chip_data(virq);
145 lv1_end_of_interrupt_ext(pd->ppe_id, pd->thread_id, virq);
149 * ps3_irq_chip - Represents the ps3_bmp as a Linux struct irq_chip.
152 static struct irq_chip ps3_irq_chip = {
154 .mask = ps3_chip_mask,
155 .unmask = ps3_chip_unmask,
160 * ps3_virq_setup - virq related setup.
161 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
163 * @outlet: The HV outlet from the various create outlet routines.
164 * @virq: The assigned Linux virq.
166 * Calls irq_create_mapping() to get a virq and sets the chip data to
170 int ps3_virq_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
174 struct ps3_private *pd;
176 /* This defines the default interrupt distribution policy. */
178 if (cpu == PS3_BINDING_CPU_ANY)
181 pd = &per_cpu(ps3_private, cpu);
183 *virq = irq_create_mapping(NULL, outlet);
185 if (*virq == NO_IRQ) {
186 pr_debug("%s:%d: irq_create_mapping failed: outlet %lu\n",
187 __func__, __LINE__, outlet);
192 pr_debug("%s:%d: outlet %lu => cpu %u, virq %u\n", __func__, __LINE__,
195 result = set_irq_chip_data(*virq, pd);
198 pr_debug("%s:%d: set_irq_chip_data failed\n",
203 ps3_chip_mask(*virq);
208 irq_dispose_mapping(*virq);
214 * ps3_virq_destroy - virq related teardown.
215 * @virq: The assigned Linux virq.
217 * Clears chip data and calls irq_dispose_mapping() for the virq.
220 int ps3_virq_destroy(unsigned int virq)
222 const struct ps3_private *pd = get_irq_chip_data(virq);
224 pr_debug("%s:%d: ppe_id %lu, thread_id %lu, virq %u\n", __func__,
225 __LINE__, pd->ppe_id, pd->thread_id, virq);
227 set_irq_chip_data(virq, NULL);
228 irq_dispose_mapping(virq);
230 pr_debug("%s:%d <-\n", __func__, __LINE__);
235 * ps3_irq_plug_setup - Generic outlet and virq related setup.
236 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
238 * @outlet: The HV outlet from the various create outlet routines.
239 * @virq: The assigned Linux virq.
241 * Sets up virq and connects the irq plug.
244 int ps3_irq_plug_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
248 struct ps3_private *pd;
250 result = ps3_virq_setup(cpu, outlet, virq);
253 pr_debug("%s:%d: ps3_virq_setup failed\n", __func__, __LINE__);
257 pd = get_irq_chip_data(*virq);
259 /* Binds outlet to cpu + virq. */
261 result = lv1_connect_irq_plug_ext(pd->ppe_id, pd->thread_id, *virq,
265 pr_info("%s:%d: lv1_connect_irq_plug_ext failed: %s\n",
266 __func__, __LINE__, ps3_result(result));
274 ps3_virq_destroy(*virq);
278 EXPORT_SYMBOL_GPL(ps3_irq_plug_setup);
281 * ps3_irq_plug_destroy - Generic outlet and virq related teardown.
282 * @virq: The assigned Linux virq.
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().
289 int ps3_irq_plug_destroy(unsigned int virq)
292 const struct ps3_private *pd = get_irq_chip_data(virq);
294 pr_debug("%s:%d: ppe_id %lu, thread_id %lu, virq %u\n", __func__,
295 __LINE__, pd->ppe_id, pd->thread_id, virq);
299 result = lv1_disconnect_irq_plug_ext(pd->ppe_id, pd->thread_id, virq);
302 pr_info("%s:%d: lv1_disconnect_irq_plug_ext failed: %s\n",
303 __func__, __LINE__, ps3_result(result));
305 ps3_virq_destroy(virq);
309 EXPORT_SYMBOL_GPL(ps3_irq_plug_destroy);
312 * ps3_event_receive_port_setup - Setup an event receive port.
313 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
315 * @virq: The assigned Linux virq.
317 * The virq can be used with lv1_connect_interrupt_event_receive_port() to
318 * arrange to receive interrupts from system-bus devices, or with
319 * ps3_send_event_locally() to signal events.
322 int ps3_event_receive_port_setup(enum ps3_cpu_binding cpu, unsigned int *virq)
325 unsigned long outlet;
327 result = lv1_construct_event_receive_port(&outlet);
330 pr_debug("%s:%d: lv1_construct_event_receive_port failed: %s\n",
331 __func__, __LINE__, ps3_result(result));
336 result = ps3_irq_plug_setup(cpu, outlet, virq);
341 EXPORT_SYMBOL_GPL(ps3_event_receive_port_setup);
344 * ps3_event_receive_port_destroy - Destroy an event receive port.
345 * @virq: The assigned Linux virq.
347 * Since ps3_event_receive_port_destroy destroys the receive port outlet,
348 * SB devices need to call disconnect_interrupt_event_receive_port() before
352 int ps3_event_receive_port_destroy(unsigned int virq)
356 pr_debug(" -> %s:%d virq %u\n", __func__, __LINE__, virq);
360 result = lv1_destruct_event_receive_port(virq_to_hw(virq));
363 pr_debug("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
364 __func__, __LINE__, ps3_result(result));
367 * Don't call ps3_virq_destroy() here since ps3_smp_cleanup_cpu()
368 * calls from interrupt context (smp_call_function) when kexecing.
371 pr_debug(" <- %s:%d\n", __func__, __LINE__);
375 int ps3_send_event_locally(unsigned int virq)
377 return lv1_send_event_locally(virq_to_hw(virq));
381 * ps3_sb_event_receive_port_setup - Setup a system bus event receive port.
382 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
384 * @dev: The system bus device instance.
385 * @virq: The assigned Linux virq.
387 * An event irq represents a virtual device interrupt. The interrupt_id
388 * coresponds to the software interrupt number.
391 int ps3_sb_event_receive_port_setup(struct ps3_system_bus_device *dev,
392 enum ps3_cpu_binding cpu, unsigned int *virq)
394 /* this should go in system-bus.c */
398 result = ps3_event_receive_port_setup(cpu, virq);
403 result = lv1_connect_interrupt_event_receive_port(dev->bus_id,
404 dev->dev_id, virq_to_hw(*virq), dev->interrupt_id);
407 pr_debug("%s:%d: lv1_connect_interrupt_event_receive_port"
408 " failed: %s\n", __func__, __LINE__,
410 ps3_event_receive_port_destroy(*virq);
415 pr_debug("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
416 dev->interrupt_id, *virq);
420 EXPORT_SYMBOL(ps3_sb_event_receive_port_setup);
422 int ps3_sb_event_receive_port_destroy(struct ps3_system_bus_device *dev,
425 /* this should go in system-bus.c */
429 pr_debug(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
430 dev->interrupt_id, virq);
432 result = lv1_disconnect_interrupt_event_receive_port(dev->bus_id,
433 dev->dev_id, virq_to_hw(virq), dev->interrupt_id);
436 pr_debug("%s:%d: lv1_disconnect_interrupt_event_receive_port"
437 " failed: %s\n", __func__, __LINE__,
440 result = ps3_event_receive_port_destroy(virq);
444 * ps3_event_receive_port_destroy() destroys the IRQ plug,
445 * so don't call ps3_irq_plug_destroy() here.
448 result = ps3_virq_destroy(virq);
451 pr_debug(" <- %s:%d\n", __func__, __LINE__);
454 EXPORT_SYMBOL(ps3_sb_event_receive_port_destroy);
457 * ps3_io_irq_setup - Setup a system bus io irq.
458 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
460 * @interrupt_id: The device interrupt id read from the system repository.
461 * @virq: The assigned Linux virq.
463 * An io irq represents a non-virtualized device interrupt. interrupt_id
464 * coresponds to the interrupt number of the interrupt controller.
467 int ps3_io_irq_setup(enum ps3_cpu_binding cpu, unsigned int interrupt_id,
471 unsigned long outlet;
473 result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
476 pr_debug("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
477 __func__, __LINE__, ps3_result(result));
481 result = ps3_irq_plug_setup(cpu, outlet, virq);
486 EXPORT_SYMBOL_GPL(ps3_io_irq_setup);
488 int ps3_io_irq_destroy(unsigned int virq)
491 unsigned long outlet = virq_to_hw(virq);
496 * lv1_destruct_io_irq_outlet() will destroy the IRQ plug,
497 * so call ps3_irq_plug_destroy() first.
500 result = ps3_irq_plug_destroy(virq);
503 result = lv1_destruct_io_irq_outlet(outlet);
506 pr_debug("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
507 __func__, __LINE__, ps3_result(result));
511 EXPORT_SYMBOL_GPL(ps3_io_irq_destroy);
514 * ps3_vuart_irq_setup - Setup the system virtual uart virq.
515 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
517 * @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap.
518 * @virq: The assigned Linux virq.
520 * The system supports only a single virtual uart, so multiple calls without
521 * freeing the interrupt will return a wrong state error.
524 int ps3_vuart_irq_setup(enum ps3_cpu_binding cpu, void* virt_addr_bmp,
528 unsigned long outlet;
531 BUG_ON(!is_kernel_addr((u64)virt_addr_bmp));
533 lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp));
535 result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet);
538 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
539 __func__, __LINE__, ps3_result(result));
543 result = ps3_irq_plug_setup(cpu, outlet, virq);
548 EXPORT_SYMBOL_GPL(ps3_vuart_irq_setup);
550 int ps3_vuart_irq_destroy(unsigned int virq)
555 result = lv1_deconfigure_virtual_uart_irq();
558 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
559 __func__, __LINE__, ps3_result(result));
563 result = ps3_irq_plug_destroy(virq);
568 EXPORT_SYMBOL_GPL(ps3_vuart_irq_destroy);
571 * ps3_spe_irq_setup - Setup an spe virq.
572 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
574 * @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.
580 int ps3_spe_irq_setup(enum ps3_cpu_binding cpu, unsigned long spe_id,
581 unsigned int class, unsigned int *virq)
584 unsigned long outlet;
588 result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
591 pr_debug("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
592 __func__, __LINE__, ps3_result(result));
596 result = ps3_irq_plug_setup(cpu, outlet, virq);
602 int ps3_spe_irq_destroy(unsigned int virq)
608 result = ps3_irq_plug_destroy(virq);
615 #define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
616 #define PS3_PLUG_MAX 63
619 static void _dump_64_bmp(const char *header, const u64 *p, unsigned cpu,
620 const char* func, int line)
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,
628 static void __maybe_unused _dump_256_bmp(const char *header,
629 const u64 *p, unsigned cpu, const char* func, int line)
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]);
635 #define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
636 static void _dump_bmp(struct ps3_private* pd, const char* func, int line)
640 spin_lock_irqsave(&pd->bmp.lock, flags);
641 _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);
643 spin_unlock_irqrestore(&pd->bmp.lock, flags);
646 #define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
647 static void __maybe_unused _dump_mask(struct ps3_private *pd,
648 const char* func, int line)
652 spin_lock_irqsave(&pd->bmp.lock, flags);
653 _dump_64_bmp("mask", &pd->bmp.mask, pd->thread_id, func, line);
654 spin_unlock_irqrestore(&pd->bmp.lock, flags);
657 static void dump_bmp(struct ps3_private* pd) {};
658 #endif /* defined(DEBUG) */
660 static void ps3_host_unmap(struct irq_host *h, unsigned int virq)
662 set_irq_chip_data(virq, NULL);
665 static int ps3_host_map(struct irq_host *h, unsigned int virq,
666 irq_hw_number_t hwirq)
668 pr_debug("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq,
671 set_irq_chip_and_handler(virq, &ps3_irq_chip, handle_fasteoi_irq);
676 static int ps3_host_match(struct irq_host *h, struct device_node *np)
682 static struct irq_host_ops ps3_host_ops = {
684 .unmap = ps3_host_unmap,
685 .match = ps3_host_match,
688 void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
690 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
692 pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq;
694 pr_debug("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__,
695 cpu, virq, pd->bmp.ipi_debug_brk_mask);
698 static unsigned int ps3_get_irq(void)
700 struct ps3_private *pd = &__get_cpu_var(ps3_private);
701 u64 x = (pd->bmp.status & pd->bmp.mask);
704 /* check for ipi break first to stop this cpu ASAP */
706 if (x & pd->bmp.ipi_debug_brk_mask)
707 x &= pd->bmp.ipi_debug_brk_mask;
709 asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x));
712 if (unlikely(plug) == NO_IRQ) {
713 pr_debug("%s:%d: no plug found: thread_id %lu\n", __func__,
714 __LINE__, pd->thread_id);
715 dump_bmp(&per_cpu(ps3_private, 0));
716 dump_bmp(&per_cpu(ps3_private, 1));
721 if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) {
722 dump_bmp(&per_cpu(ps3_private, 0));
723 dump_bmp(&per_cpu(ps3_private, 1));
730 void __init ps3_init_IRQ(void)
734 struct irq_host *host;
736 host = irq_alloc_host(NULL, IRQ_HOST_MAP_NOMAP, 0, &ps3_host_ops,
738 irq_set_default_host(host);
739 irq_set_virq_count(PS3_PLUG_MAX + 1);
741 for_each_possible_cpu(cpu) {
742 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
744 lv1_get_logical_ppe_id(&pd->ppe_id);
745 pd->thread_id = get_hard_smp_processor_id(cpu);
746 spin_lock_init(&pd->bmp.lock);
748 pr_debug("%s:%d: ppe_id %lu, thread_id %lu, bmp %lxh\n",
749 __func__, __LINE__, pd->ppe_id, pd->thread_id,
750 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
752 result = lv1_configure_irq_state_bitmap(pd->ppe_id,
753 pd->thread_id, ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
756 pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
757 " %s\n", __func__, __LINE__,
761 ppc_md.get_irq = ps3_get_irq;
764 void ps3_shutdown_IRQ(int cpu)
768 u64 thread_id = get_hard_smp_processor_id(cpu);
770 lv1_get_logical_ppe_id(&ppe_id);
771 result = lv1_configure_irq_state_bitmap(ppe_id, thread_id, 0);
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));