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);
103 u64 bit = 0x8000000000000000UL >> virq;
104 u64 *p = &pd->bmp.mask;
108 pr_debug("%s:%d: thread_id %lu, virq %d\n", __func__, __LINE__,
109 pd->thread_id, virq);
111 local_irq_save(flags);
117 : "=&r" (old), "+m" (*p)
121 lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
122 local_irq_restore(flags);
126 * ps3_chip_unmask - Clear an interrupt mask bit in ps3_bmp.
127 * @virq: The assigned Linux virq.
129 * Clears ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
132 static void ps3_chip_unmask(unsigned int virq)
134 struct ps3_private *pd = get_irq_chip_data(virq);
135 u64 bit = 0x8000000000000000UL >> virq;
136 u64 *p = &pd->bmp.mask;
140 pr_debug("%s:%d: thread_id %lu, virq %d\n", __func__, __LINE__,
141 pd->thread_id, virq);
143 local_irq_save(flags);
149 : "=&r" (old), "+m" (*p)
153 lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id);
154 local_irq_restore(flags);
158 * ps3_chip_eoi - HV end-of-interrupt.
159 * @virq: The assigned Linux virq.
161 * Calls lv1_end_of_interrupt_ext().
164 static void ps3_chip_eoi(unsigned int virq)
166 const struct ps3_private *pd = get_irq_chip_data(virq);
167 lv1_end_of_interrupt_ext(pd->ppe_id, pd->thread_id, virq);
171 * ps3_irq_chip - Represents the ps3_bmp as a Linux struct irq_chip.
174 static struct irq_chip ps3_irq_chip = {
176 .mask = ps3_chip_mask,
177 .unmask = ps3_chip_unmask,
182 * ps3_virq_setup - virq related setup.
183 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
185 * @outlet: The HV outlet from the various create outlet routines.
186 * @virq: The assigned Linux virq.
188 * Calls irq_create_mapping() to get a virq and sets the chip data to
192 int ps3_virq_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
196 struct ps3_private *pd;
198 /* This defines the default interrupt distribution policy. */
200 if (cpu == PS3_BINDING_CPU_ANY)
203 pd = &per_cpu(ps3_private, cpu);
205 *virq = irq_create_mapping(NULL, outlet);
207 if (*virq == NO_IRQ) {
208 pr_debug("%s:%d: irq_create_mapping failed: outlet %lu\n",
209 __func__, __LINE__, outlet);
214 pr_debug("%s:%d: outlet %lu => cpu %u, virq %u\n", __func__, __LINE__,
217 result = set_irq_chip_data(*virq, pd);
220 pr_debug("%s:%d: set_irq_chip_data failed\n",
225 ps3_chip_mask(*virq);
230 irq_dispose_mapping(*virq);
236 * ps3_virq_destroy - virq related teardown.
237 * @virq: The assigned Linux virq.
239 * Clears chip data and calls irq_dispose_mapping() for the virq.
242 int ps3_virq_destroy(unsigned int virq)
244 const struct ps3_private *pd = get_irq_chip_data(virq);
246 pr_debug("%s:%d: ppe_id %lu, thread_id %lu, virq %u\n", __func__,
247 __LINE__, pd->ppe_id, pd->thread_id, virq);
249 set_irq_chip_data(virq, NULL);
250 irq_dispose_mapping(virq);
252 pr_debug("%s:%d <-\n", __func__, __LINE__);
257 * ps3_irq_plug_setup - Generic outlet and virq related setup.
258 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
260 * @outlet: The HV outlet from the various create outlet routines.
261 * @virq: The assigned Linux virq.
263 * Sets up virq and connects the irq plug.
266 int ps3_irq_plug_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
270 struct ps3_private *pd;
272 result = ps3_virq_setup(cpu, outlet, virq);
275 pr_debug("%s:%d: ps3_virq_setup failed\n", __func__, __LINE__);
279 pd = get_irq_chip_data(*virq);
281 /* Binds outlet to cpu + virq. */
283 result = lv1_connect_irq_plug_ext(pd->ppe_id, pd->thread_id, *virq,
287 pr_info("%s:%d: lv1_connect_irq_plug_ext failed: %s\n",
288 __func__, __LINE__, ps3_result(result));
296 ps3_virq_destroy(*virq);
300 EXPORT_SYMBOL_GPL(ps3_irq_plug_setup);
303 * ps3_irq_plug_destroy - Generic outlet and virq related teardown.
304 * @virq: The assigned Linux virq.
306 * Disconnects the irq plug and tears down virq.
307 * Do not call for system bus event interrupts setup with
308 * ps3_sb_event_receive_port_setup().
311 int ps3_irq_plug_destroy(unsigned int virq)
314 const struct ps3_private *pd = get_irq_chip_data(virq);
316 pr_debug("%s:%d: ppe_id %lu, thread_id %lu, virq %u\n", __func__,
317 __LINE__, pd->ppe_id, pd->thread_id, virq);
321 result = lv1_disconnect_irq_plug_ext(pd->ppe_id, pd->thread_id, virq);
324 pr_info("%s:%d: lv1_disconnect_irq_plug_ext failed: %s\n",
325 __func__, __LINE__, ps3_result(result));
327 ps3_virq_destroy(virq);
331 EXPORT_SYMBOL_GPL(ps3_irq_plug_destroy);
334 * ps3_event_receive_port_setup - Setup an event receive port.
335 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
337 * @virq: The assigned Linux virq.
339 * The virq can be used with lv1_connect_interrupt_event_receive_port() to
340 * arrange to receive interrupts from system-bus devices, or with
341 * ps3_send_event_locally() to signal events.
344 int ps3_event_receive_port_setup(enum ps3_cpu_binding cpu, unsigned int *virq)
347 unsigned long outlet;
349 result = lv1_construct_event_receive_port(&outlet);
352 pr_debug("%s:%d: lv1_construct_event_receive_port failed: %s\n",
353 __func__, __LINE__, ps3_result(result));
358 result = ps3_irq_plug_setup(cpu, outlet, virq);
363 EXPORT_SYMBOL_GPL(ps3_event_receive_port_setup);
366 * ps3_event_receive_port_destroy - Destroy an event receive port.
367 * @virq: The assigned Linux virq.
369 * Since ps3_event_receive_port_destroy destroys the receive port outlet,
370 * SB devices need to call disconnect_interrupt_event_receive_port() before
374 int ps3_event_receive_port_destroy(unsigned int virq)
378 pr_debug(" -> %s:%d virq %u\n", __func__, __LINE__, virq);
382 result = lv1_destruct_event_receive_port(virq_to_hw(virq));
385 pr_debug("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
386 __func__, __LINE__, ps3_result(result));
389 * Don't call ps3_virq_destroy() here since ps3_smp_cleanup_cpu()
390 * calls from interrupt context (smp_call_function) when kexecing.
393 pr_debug(" <- %s:%d\n", __func__, __LINE__);
397 int ps3_send_event_locally(unsigned int virq)
399 return lv1_send_event_locally(virq_to_hw(virq));
403 * ps3_sb_event_receive_port_setup - Setup a system bus event receive port.
404 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
406 * @dev: The system bus device instance.
407 * @virq: The assigned Linux virq.
409 * An event irq represents a virtual device interrupt. The interrupt_id
410 * coresponds to the software interrupt number.
413 int ps3_sb_event_receive_port_setup(struct ps3_system_bus_device *dev,
414 enum ps3_cpu_binding cpu, unsigned int *virq)
416 /* this should go in system-bus.c */
420 result = ps3_event_receive_port_setup(cpu, virq);
425 result = lv1_connect_interrupt_event_receive_port(dev->bus_id,
426 dev->dev_id, virq_to_hw(*virq), dev->interrupt_id);
429 pr_debug("%s:%d: lv1_connect_interrupt_event_receive_port"
430 " failed: %s\n", __func__, __LINE__,
432 ps3_event_receive_port_destroy(*virq);
437 pr_debug("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
438 dev->interrupt_id, *virq);
442 EXPORT_SYMBOL(ps3_sb_event_receive_port_setup);
444 int ps3_sb_event_receive_port_destroy(struct ps3_system_bus_device *dev,
447 /* this should go in system-bus.c */
451 pr_debug(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
452 dev->interrupt_id, virq);
454 result = lv1_disconnect_interrupt_event_receive_port(dev->bus_id,
455 dev->dev_id, virq_to_hw(virq), dev->interrupt_id);
458 pr_debug("%s:%d: lv1_disconnect_interrupt_event_receive_port"
459 " failed: %s\n", __func__, __LINE__,
462 result = ps3_event_receive_port_destroy(virq);
466 * ps3_event_receive_port_destroy() destroys the IRQ plug,
467 * so don't call ps3_irq_plug_destroy() here.
470 result = ps3_virq_destroy(virq);
473 pr_debug(" <- %s:%d\n", __func__, __LINE__);
476 EXPORT_SYMBOL(ps3_sb_event_receive_port_destroy);
479 * ps3_io_irq_setup - Setup a system bus io irq.
480 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
482 * @interrupt_id: The device interrupt id read from the system repository.
483 * @virq: The assigned Linux virq.
485 * An io irq represents a non-virtualized device interrupt. interrupt_id
486 * coresponds to the interrupt number of the interrupt controller.
489 int ps3_io_irq_setup(enum ps3_cpu_binding cpu, unsigned int interrupt_id,
493 unsigned long outlet;
495 result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
498 pr_debug("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
499 __func__, __LINE__, ps3_result(result));
503 result = ps3_irq_plug_setup(cpu, outlet, virq);
508 EXPORT_SYMBOL_GPL(ps3_io_irq_setup);
510 int ps3_io_irq_destroy(unsigned int virq)
513 unsigned long outlet = virq_to_hw(virq);
518 * lv1_destruct_io_irq_outlet() will destroy the IRQ plug,
519 * so call ps3_irq_plug_destroy() first.
522 result = ps3_irq_plug_destroy(virq);
525 result = lv1_destruct_io_irq_outlet(outlet);
528 pr_debug("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
529 __func__, __LINE__, ps3_result(result));
533 EXPORT_SYMBOL_GPL(ps3_io_irq_destroy);
536 * ps3_vuart_irq_setup - Setup the system virtual uart virq.
537 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
539 * @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap.
540 * @virq: The assigned Linux virq.
542 * The system supports only a single virtual uart, so multiple calls without
543 * freeing the interrupt will return a wrong state error.
546 int ps3_vuart_irq_setup(enum ps3_cpu_binding cpu, void* virt_addr_bmp,
550 unsigned long outlet;
553 BUG_ON(!is_kernel_addr((u64)virt_addr_bmp));
555 lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp));
557 result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet);
560 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
561 __func__, __LINE__, ps3_result(result));
565 result = ps3_irq_plug_setup(cpu, outlet, virq);
570 EXPORT_SYMBOL_GPL(ps3_vuart_irq_setup);
572 int ps3_vuart_irq_destroy(unsigned int virq)
577 result = lv1_deconfigure_virtual_uart_irq();
580 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
581 __func__, __LINE__, ps3_result(result));
585 result = ps3_irq_plug_destroy(virq);
590 EXPORT_SYMBOL_GPL(ps3_vuart_irq_destroy);
593 * ps3_spe_irq_setup - Setup an spe virq.
594 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
596 * @spe_id: The spe_id returned from lv1_construct_logical_spe().
597 * @class: The spe interrupt class {0,1,2}.
598 * @virq: The assigned Linux virq.
602 int ps3_spe_irq_setup(enum ps3_cpu_binding cpu, unsigned long spe_id,
603 unsigned int class, unsigned int *virq)
606 unsigned long outlet;
610 result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
613 pr_debug("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
614 __func__, __LINE__, ps3_result(result));
618 result = ps3_irq_plug_setup(cpu, outlet, virq);
624 int ps3_spe_irq_destroy(unsigned int virq)
630 result = ps3_irq_plug_destroy(virq);
637 #define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
638 #define PS3_PLUG_MAX 63
641 static void _dump_64_bmp(const char *header, const u64 *p, unsigned cpu,
642 const char* func, int line)
644 pr_debug("%s:%d: %s %u {%04lx_%04lx_%04lx_%04lx}\n",
645 func, line, header, cpu,
646 *p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff,
650 static void __maybe_unused _dump_256_bmp(const char *header,
651 const u64 *p, unsigned cpu, const char* func, int line)
653 pr_debug("%s:%d: %s %u {%016lx:%016lx:%016lx:%016lx}\n",
654 func, line, header, cpu, p[0], p[1], p[2], p[3]);
657 #define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
658 static void _dump_bmp(struct ps3_private* pd, const char* func, int line)
662 spin_lock_irqsave(&pd->bmp.lock, flags);
663 _dump_64_bmp("stat", &pd->bmp.status, pd->thread_id, func, line);
664 _dump_64_bmp("mask", &pd->bmp.mask, pd->thread_id, func, line);
665 spin_unlock_irqrestore(&pd->bmp.lock, flags);
668 #define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
669 static void __maybe_unused _dump_mask(struct ps3_private *pd,
670 const char* func, int line)
674 spin_lock_irqsave(&pd->bmp.lock, flags);
675 _dump_64_bmp("mask", &pd->bmp.mask, pd->thread_id, func, line);
676 spin_unlock_irqrestore(&pd->bmp.lock, flags);
679 static void dump_bmp(struct ps3_private* pd) {};
680 #endif /* defined(DEBUG) */
682 static void ps3_host_unmap(struct irq_host *h, unsigned int virq)
684 set_irq_chip_data(virq, NULL);
687 static int ps3_host_map(struct irq_host *h, unsigned int virq,
688 irq_hw_number_t hwirq)
690 pr_debug("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq,
693 set_irq_chip_and_handler(virq, &ps3_irq_chip, handle_fasteoi_irq);
698 static struct irq_host_ops ps3_host_ops = {
700 .unmap = ps3_host_unmap,
703 void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
705 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
707 pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq;
709 pr_debug("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__,
710 cpu, virq, pd->bmp.ipi_debug_brk_mask);
713 static unsigned int ps3_get_irq(void)
715 struct ps3_private *pd = &__get_cpu_var(ps3_private);
716 u64 x = (pd->bmp.status & pd->bmp.mask);
719 /* check for ipi break first to stop this cpu ASAP */
721 if (x & pd->bmp.ipi_debug_brk_mask)
722 x &= pd->bmp.ipi_debug_brk_mask;
724 asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x));
727 if (unlikely(plug) == NO_IRQ) {
728 pr_debug("%s:%d: no plug found: thread_id %lu\n", __func__,
729 __LINE__, pd->thread_id);
730 dump_bmp(&per_cpu(ps3_private, 0));
731 dump_bmp(&per_cpu(ps3_private, 1));
736 if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) {
737 dump_bmp(&per_cpu(ps3_private, 0));
738 dump_bmp(&per_cpu(ps3_private, 1));
745 void __init ps3_init_IRQ(void)
749 struct irq_host *host;
751 host = irq_alloc_host(IRQ_HOST_MAP_NOMAP, 0, &ps3_host_ops,
753 irq_set_default_host(host);
754 irq_set_virq_count(PS3_PLUG_MAX + 1);
756 for_each_possible_cpu(cpu) {
757 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
759 lv1_get_logical_ppe_id(&pd->ppe_id);
760 pd->thread_id = get_hard_smp_processor_id(cpu);
761 spin_lock_init(&pd->bmp.lock);
763 pr_debug("%s:%d: ppe_id %lu, thread_id %lu, bmp %lxh\n",
764 __func__, __LINE__, pd->ppe_id, pd->thread_id,
765 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
767 result = lv1_configure_irq_state_bitmap(pd->ppe_id,
768 pd->thread_id, ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
771 pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
772 " %s\n", __func__, __LINE__,
776 ppc_md.get_irq = ps3_get_irq;
779 void ps3_shutdown_IRQ(int cpu)
783 u64 thread_id = get_hard_smp_processor_id(cpu);
785 lv1_get_logical_ppe_id(&ppe_id);
786 result = lv1_configure_irq_state_bitmap(ppe_id, thread_id, 0);
788 DBG("%s:%d: lv1_configure_irq_state_bitmap (%lu:%lu/%d) %s\n", __func__,
789 __LINE__, ppe_id, thread_id, cpu, ps3_result(result));