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
64 * The mask is declared as unsigned long so we can use set/clear_bit on it.
67 #define PS3_BMP_MINALIGN 64
76 u64 ipi_debug_brk_mask;
81 * struct ps3_private - a per cpu data structure
82 * @bmp: ps3_bmp structure
83 * @ppe_id: HV logical_ppe_id
84 * @thread_id: HV thread_id
88 struct ps3_bmp bmp __attribute__ ((aligned (PS3_BMP_MINALIGN)));
93 static DEFINE_PER_CPU(struct ps3_private, ps3_private);
96 * ps3_chip_mask - Set an interrupt mask bit in ps3_bmp.
97 * @virq: The assigned Linux virq.
99 * Sets ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
102 static void ps3_chip_mask(unsigned int virq)
104 struct ps3_private *pd = get_irq_chip_data(virq);
107 pr_debug("%s:%d: thread_id %llu, virq %d\n", __func__, __LINE__,
108 pd->thread_id, virq);
110 local_irq_save(flags);
111 clear_bit(63 - virq, &pd->bmp.mask);
112 lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
113 local_irq_restore(flags);
117 * ps3_chip_unmask - Clear an interrupt mask bit in ps3_bmp.
118 * @virq: The assigned Linux virq.
120 * Clears ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
123 static void ps3_chip_unmask(unsigned int virq)
125 struct ps3_private *pd = get_irq_chip_data(virq);
128 pr_debug("%s:%d: thread_id %llu, virq %d\n", __func__, __LINE__,
129 pd->thread_id, virq);
131 local_irq_save(flags);
132 set_bit(63 - virq, &pd->bmp.mask);
133 lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
134 local_irq_restore(flags);
138 * ps3_chip_eoi - HV end-of-interrupt.
139 * @virq: The assigned Linux virq.
141 * Calls lv1_end_of_interrupt_ext().
144 static void ps3_chip_eoi(unsigned int virq)
146 const struct ps3_private *pd = get_irq_chip_data(virq);
147 lv1_end_of_interrupt_ext(pd->ppe_id, pd->thread_id, virq);
151 * ps3_irq_chip - Represents the ps3_bmp as a Linux struct irq_chip.
154 static struct irq_chip ps3_irq_chip = {
156 .mask = ps3_chip_mask,
157 .unmask = ps3_chip_unmask,
162 * ps3_virq_setup - virq related setup.
163 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
165 * @outlet: The HV outlet from the various create outlet routines.
166 * @virq: The assigned Linux virq.
168 * Calls irq_create_mapping() to get a virq and sets the chip data to
172 static int ps3_virq_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
176 struct ps3_private *pd;
178 /* This defines the default interrupt distribution policy. */
180 if (cpu == PS3_BINDING_CPU_ANY)
183 pd = &per_cpu(ps3_private, cpu);
185 *virq = irq_create_mapping(NULL, outlet);
187 if (*virq == NO_IRQ) {
188 pr_debug("%s:%d: irq_create_mapping failed: outlet %lu\n",
189 __func__, __LINE__, outlet);
194 pr_debug("%s:%d: outlet %lu => cpu %u, virq %u\n", __func__, __LINE__,
197 result = set_irq_chip_data(*virq, pd);
200 pr_debug("%s:%d: set_irq_chip_data failed\n",
205 ps3_chip_mask(*virq);
210 irq_dispose_mapping(*virq);
216 * ps3_virq_destroy - virq related teardown.
217 * @virq: The assigned Linux virq.
219 * Clears chip data and calls irq_dispose_mapping() for the virq.
222 static int ps3_virq_destroy(unsigned int virq)
224 const struct ps3_private *pd = get_irq_chip_data(virq);
226 pr_debug("%s:%d: ppe_id %llu, thread_id %llu, virq %u\n", __func__,
227 __LINE__, pd->ppe_id, pd->thread_id, virq);
229 set_irq_chip_data(virq, NULL);
230 irq_dispose_mapping(virq);
232 pr_debug("%s:%d <-\n", __func__, __LINE__);
237 * ps3_irq_plug_setup - Generic outlet and virq related setup.
238 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
240 * @outlet: The HV outlet from the various create outlet routines.
241 * @virq: The assigned Linux virq.
243 * Sets up virq and connects the irq plug.
246 int ps3_irq_plug_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
250 struct ps3_private *pd;
252 result = ps3_virq_setup(cpu, outlet, virq);
255 pr_debug("%s:%d: ps3_virq_setup failed\n", __func__, __LINE__);
259 pd = get_irq_chip_data(*virq);
261 /* Binds outlet to cpu + virq. */
263 result = lv1_connect_irq_plug_ext(pd->ppe_id, pd->thread_id, *virq,
267 pr_info("%s:%d: lv1_connect_irq_plug_ext failed: %s\n",
268 __func__, __LINE__, ps3_result(result));
276 ps3_virq_destroy(*virq);
280 EXPORT_SYMBOL_GPL(ps3_irq_plug_setup);
283 * ps3_irq_plug_destroy - Generic outlet and virq related teardown.
284 * @virq: The assigned Linux virq.
286 * Disconnects the irq plug and tears down virq.
287 * Do not call for system bus event interrupts setup with
288 * ps3_sb_event_receive_port_setup().
291 int ps3_irq_plug_destroy(unsigned int virq)
294 const struct ps3_private *pd = get_irq_chip_data(virq);
296 pr_debug("%s:%d: ppe_id %llu, thread_id %llu, virq %u\n", __func__,
297 __LINE__, pd->ppe_id, pd->thread_id, virq);
301 result = lv1_disconnect_irq_plug_ext(pd->ppe_id, pd->thread_id, virq);
304 pr_info("%s:%d: lv1_disconnect_irq_plug_ext failed: %s\n",
305 __func__, __LINE__, ps3_result(result));
307 ps3_virq_destroy(virq);
311 EXPORT_SYMBOL_GPL(ps3_irq_plug_destroy);
314 * ps3_event_receive_port_setup - Setup an event receive port.
315 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
317 * @virq: The assigned Linux virq.
319 * The virq can be used with lv1_connect_interrupt_event_receive_port() to
320 * arrange to receive interrupts from system-bus devices, or with
321 * ps3_send_event_locally() to signal events.
324 int ps3_event_receive_port_setup(enum ps3_cpu_binding cpu, unsigned int *virq)
329 result = lv1_construct_event_receive_port(&outlet);
332 pr_debug("%s:%d: lv1_construct_event_receive_port failed: %s\n",
333 __func__, __LINE__, ps3_result(result));
338 result = ps3_irq_plug_setup(cpu, outlet, virq);
343 EXPORT_SYMBOL_GPL(ps3_event_receive_port_setup);
346 * ps3_event_receive_port_destroy - Destroy an event receive port.
347 * @virq: The assigned Linux virq.
349 * Since ps3_event_receive_port_destroy destroys the receive port outlet,
350 * SB devices need to call disconnect_interrupt_event_receive_port() before
354 int ps3_event_receive_port_destroy(unsigned int virq)
358 pr_debug(" -> %s:%d virq %u\n", __func__, __LINE__, virq);
362 result = lv1_destruct_event_receive_port(virq_to_hw(virq));
365 pr_debug("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
366 __func__, __LINE__, ps3_result(result));
369 * Don't call ps3_virq_destroy() here since ps3_smp_cleanup_cpu()
370 * calls from interrupt context (smp_call_function) when kexecing.
373 pr_debug(" <- %s:%d\n", __func__, __LINE__);
377 int ps3_send_event_locally(unsigned int virq)
379 return lv1_send_event_locally(virq_to_hw(virq));
383 * ps3_sb_event_receive_port_setup - Setup a system bus event receive port.
384 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
386 * @dev: The system bus device instance.
387 * @virq: The assigned Linux virq.
389 * An event irq represents a virtual device interrupt. The interrupt_id
390 * coresponds to the software interrupt number.
393 int ps3_sb_event_receive_port_setup(struct ps3_system_bus_device *dev,
394 enum ps3_cpu_binding cpu, unsigned int *virq)
396 /* this should go in system-bus.c */
400 result = ps3_event_receive_port_setup(cpu, virq);
405 result = lv1_connect_interrupt_event_receive_port(dev->bus_id,
406 dev->dev_id, virq_to_hw(*virq), dev->interrupt_id);
409 pr_debug("%s:%d: lv1_connect_interrupt_event_receive_port"
410 " failed: %s\n", __func__, __LINE__,
412 ps3_event_receive_port_destroy(*virq);
417 pr_debug("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
418 dev->interrupt_id, *virq);
422 EXPORT_SYMBOL(ps3_sb_event_receive_port_setup);
424 int ps3_sb_event_receive_port_destroy(struct ps3_system_bus_device *dev,
427 /* this should go in system-bus.c */
431 pr_debug(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
432 dev->interrupt_id, virq);
434 result = lv1_disconnect_interrupt_event_receive_port(dev->bus_id,
435 dev->dev_id, virq_to_hw(virq), dev->interrupt_id);
438 pr_debug("%s:%d: lv1_disconnect_interrupt_event_receive_port"
439 " failed: %s\n", __func__, __LINE__,
442 result = ps3_event_receive_port_destroy(virq);
446 * ps3_event_receive_port_destroy() destroys the IRQ plug,
447 * so don't call ps3_irq_plug_destroy() here.
450 result = ps3_virq_destroy(virq);
453 pr_debug(" <- %s:%d\n", __func__, __LINE__);
456 EXPORT_SYMBOL(ps3_sb_event_receive_port_destroy);
459 * ps3_io_irq_setup - Setup a system bus io irq.
460 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
462 * @interrupt_id: The device interrupt id read from the system repository.
463 * @virq: The assigned Linux virq.
465 * An io irq represents a non-virtualized device interrupt. interrupt_id
466 * coresponds to the interrupt number of the interrupt controller.
469 int ps3_io_irq_setup(enum ps3_cpu_binding cpu, unsigned int interrupt_id,
475 result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
478 pr_debug("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
479 __func__, __LINE__, ps3_result(result));
483 result = ps3_irq_plug_setup(cpu, outlet, virq);
488 EXPORT_SYMBOL_GPL(ps3_io_irq_setup);
490 int ps3_io_irq_destroy(unsigned int virq)
493 unsigned long outlet = virq_to_hw(virq);
498 * lv1_destruct_io_irq_outlet() will destroy the IRQ plug,
499 * so call ps3_irq_plug_destroy() first.
502 result = ps3_irq_plug_destroy(virq);
505 result = lv1_destruct_io_irq_outlet(outlet);
508 pr_debug("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
509 __func__, __LINE__, ps3_result(result));
513 EXPORT_SYMBOL_GPL(ps3_io_irq_destroy);
516 * ps3_vuart_irq_setup - Setup the system virtual uart virq.
517 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
519 * @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap.
520 * @virq: The assigned Linux virq.
522 * The system supports only a single virtual uart, so multiple calls without
523 * freeing the interrupt will return a wrong state error.
526 int ps3_vuart_irq_setup(enum ps3_cpu_binding cpu, void* virt_addr_bmp,
533 BUG_ON(!is_kernel_addr((u64)virt_addr_bmp));
535 lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp));
537 result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet);
540 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
541 __func__, __LINE__, ps3_result(result));
545 result = ps3_irq_plug_setup(cpu, outlet, virq);
550 EXPORT_SYMBOL_GPL(ps3_vuart_irq_setup);
552 int ps3_vuart_irq_destroy(unsigned int virq)
557 result = lv1_deconfigure_virtual_uart_irq();
560 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
561 __func__, __LINE__, ps3_result(result));
565 result = ps3_irq_plug_destroy(virq);
570 EXPORT_SYMBOL_GPL(ps3_vuart_irq_destroy);
573 * ps3_spe_irq_setup - Setup an spe virq.
574 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
576 * @spe_id: The spe_id returned from lv1_construct_logical_spe().
577 * @class: The spe interrupt class {0,1,2}.
578 * @virq: The assigned Linux virq.
582 int ps3_spe_irq_setup(enum ps3_cpu_binding cpu, unsigned long spe_id,
583 unsigned int class, unsigned int *virq)
590 result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
593 pr_debug("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
594 __func__, __LINE__, ps3_result(result));
598 result = ps3_irq_plug_setup(cpu, outlet, virq);
604 int ps3_spe_irq_destroy(unsigned int virq)
610 result = ps3_irq_plug_destroy(virq);
617 #define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
618 #define PS3_PLUG_MAX 63
621 static void _dump_64_bmp(const char *header, const u64 *p, unsigned cpu,
622 const char* func, int line)
624 pr_debug("%s:%d: %s %u {%04lx_%04lx_%04lx_%04lx}\n",
625 func, line, header, cpu,
626 *p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff,
630 static void __maybe_unused _dump_256_bmp(const char *header,
631 const u64 *p, unsigned cpu, const char* func, int line)
633 pr_debug("%s:%d: %s %u {%016lx:%016lx:%016lx:%016lx}\n",
634 func, line, header, cpu, p[0], p[1], p[2], p[3]);
637 #define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
638 static void _dump_bmp(struct ps3_private* pd, const char* func, int line)
642 spin_lock_irqsave(&pd->bmp.lock, flags);
643 _dump_64_bmp("stat", &pd->bmp.status, pd->thread_id, func, line);
644 _dump_64_bmp("mask", &pd->bmp.mask, pd->thread_id, func, line);
645 spin_unlock_irqrestore(&pd->bmp.lock, flags);
648 #define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
649 static void __maybe_unused _dump_mask(struct ps3_private *pd,
650 const char* func, int line)
654 spin_lock_irqsave(&pd->bmp.lock, flags);
655 _dump_64_bmp("mask", &pd->bmp.mask, pd->thread_id, func, line);
656 spin_unlock_irqrestore(&pd->bmp.lock, flags);
659 static void dump_bmp(struct ps3_private* pd) {};
660 #endif /* defined(DEBUG) */
662 static void ps3_host_unmap(struct irq_host *h, unsigned int virq)
664 set_irq_chip_data(virq, NULL);
667 static int ps3_host_map(struct irq_host *h, unsigned int virq,
668 irq_hw_number_t hwirq)
670 pr_debug("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq,
673 set_irq_chip_and_handler(virq, &ps3_irq_chip, handle_fasteoi_irq);
678 static int ps3_host_match(struct irq_host *h, struct device_node *np)
684 static struct irq_host_ops ps3_host_ops = {
686 .unmap = ps3_host_unmap,
687 .match = ps3_host_match,
690 void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
692 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
694 pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq;
696 pr_debug("%s:%d: cpu %u, virq %u, mask %llxh\n", __func__, __LINE__,
697 cpu, virq, pd->bmp.ipi_debug_brk_mask);
700 static unsigned int ps3_get_irq(void)
702 struct ps3_private *pd = &__get_cpu_var(ps3_private);
703 u64 x = (pd->bmp.status & pd->bmp.mask);
706 /* check for ipi break first to stop this cpu ASAP */
708 if (x & pd->bmp.ipi_debug_brk_mask)
709 x &= pd->bmp.ipi_debug_brk_mask;
711 asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x));
714 if (unlikely(plug == NO_IRQ)) {
715 pr_debug("%s:%d: no plug found: thread_id %llu\n", __func__,
716 __LINE__, pd->thread_id);
717 dump_bmp(&per_cpu(ps3_private, 0));
718 dump_bmp(&per_cpu(ps3_private, 1));
723 if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) {
724 dump_bmp(&per_cpu(ps3_private, 0));
725 dump_bmp(&per_cpu(ps3_private, 1));
732 void __init ps3_init_IRQ(void)
736 struct irq_host *host;
738 host = irq_alloc_host(NULL, IRQ_HOST_MAP_NOMAP, 0, &ps3_host_ops,
740 irq_set_default_host(host);
741 irq_set_virq_count(PS3_PLUG_MAX + 1);
743 for_each_possible_cpu(cpu) {
744 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
746 lv1_get_logical_ppe_id(&pd->ppe_id);
747 pd->thread_id = get_hard_smp_processor_id(cpu);
748 spin_lock_init(&pd->bmp.lock);
750 pr_debug("%s:%d: ppe_id %llu, thread_id %llu, bmp %lxh\n",
751 __func__, __LINE__, pd->ppe_id, pd->thread_id,
752 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
754 result = lv1_configure_irq_state_bitmap(pd->ppe_id,
755 pd->thread_id, ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
758 pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
759 " %s\n", __func__, __LINE__,
763 ppc_md.get_irq = ps3_get_irq;
766 void ps3_shutdown_IRQ(int cpu)
770 u64 thread_id = get_hard_smp_processor_id(cpu);
772 lv1_get_logical_ppe_id(&ppe_id);
773 result = lv1_configure_irq_state_bitmap(ppe_id, thread_id, 0);
775 DBG("%s:%d: lv1_configure_irq_state_bitmap (%llu:%llu/%d) %s\n", __func__,
776 __LINE__, ppe_id, thread_id, cpu, ps3_result(result));