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(fmt...) udbg_printf(fmt)
35 #define DBG(fmt...) do{if(0)printk(fmt);}while(0)
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 * @node: HV logical_ppe_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: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
110 local_irq_save(flags);
116 : "=&r" (old), "+m" (*p)
120 lv1_did_update_interrupt_mask(pd->node, pd->cpu);
121 local_irq_restore(flags);
125 * ps3_chip_unmask - Clear an interrupt mask bit in ps3_bmp.
126 * @virq: The assigned Linux virq.
128 * Clears ps3_bmp.mask and calls lv1_did_update_interrupt_mask().
131 static void ps3_chip_unmask(unsigned int virq)
133 struct ps3_private *pd = get_irq_chip_data(virq);
134 u64 bit = 0x8000000000000000UL >> virq;
135 u64 *p = &pd->bmp.mask;
139 pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
141 local_irq_save(flags);
147 : "=&r" (old), "+m" (*p)
151 lv1_did_update_interrupt_mask(pd->node, pd->cpu);
152 local_irq_restore(flags);
156 * ps3_chip_eoi - HV end-of-interrupt.
157 * @virq: The assigned Linux virq.
159 * Calls lv1_end_of_interrupt_ext().
162 static void ps3_chip_eoi(unsigned int virq)
164 const struct ps3_private *pd = get_irq_chip_data(virq);
165 lv1_end_of_interrupt_ext(pd->node, pd->cpu, virq);
169 * ps3_irq_chip - Represents the ps3_bmp as a Linux struct irq_chip.
172 static struct irq_chip ps3_irq_chip = {
174 .mask = ps3_chip_mask,
175 .unmask = ps3_chip_unmask,
180 * ps3_virq_setup - virq related setup.
181 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
183 * @outlet: The HV outlet from the various create outlet routines.
184 * @virq: The assigned Linux virq.
186 * Calls irq_create_mapping() to get a virq and sets the chip data to
190 int ps3_virq_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
194 struct ps3_private *pd;
196 /* This defines the default interrupt distribution policy. */
198 if (cpu == PS3_BINDING_CPU_ANY)
201 pd = &per_cpu(ps3_private, cpu);
203 *virq = irq_create_mapping(NULL, outlet);
205 if (*virq == NO_IRQ) {
206 pr_debug("%s:%d: irq_create_mapping failed: outlet %lu\n",
207 __func__, __LINE__, outlet);
212 pr_debug("%s:%d: outlet %lu => cpu %u, virq %u\n", __func__, __LINE__,
215 result = set_irq_chip_data(*virq, pd);
218 pr_debug("%s:%d: set_irq_chip_data failed\n",
226 irq_dispose_mapping(*virq);
232 * ps3_virq_destroy - virq related teardown.
233 * @virq: The assigned Linux virq.
235 * Clears chip data and calls irq_dispose_mapping() for the virq.
238 int ps3_virq_destroy(unsigned int virq)
240 const struct ps3_private *pd = get_irq_chip_data(virq);
242 pr_debug("%s:%d: node %lu, cpu %d, virq %u\n", __func__, __LINE__,
243 pd->node, pd->cpu, virq);
245 set_irq_chip_data(virq, NULL);
246 irq_dispose_mapping(virq);
248 pr_debug("%s:%d <-\n", __func__, __LINE__);
253 * ps3_irq_plug_setup - Generic outlet and virq related setup.
254 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
256 * @outlet: The HV outlet from the various create outlet routines.
257 * @virq: The assigned Linux virq.
259 * Sets up virq and connects the irq plug.
262 int ps3_irq_plug_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
266 struct ps3_private *pd;
268 result = ps3_virq_setup(cpu, outlet, virq);
271 pr_debug("%s:%d: ps3_virq_setup failed\n", __func__, __LINE__);
275 pd = get_irq_chip_data(*virq);
277 /* Binds outlet to cpu + virq. */
279 result = lv1_connect_irq_plug_ext(pd->node, pd->cpu, *virq, outlet, 0);
282 pr_info("%s:%d: lv1_connect_irq_plug_ext failed: %s\n",
283 __func__, __LINE__, ps3_result(result));
291 ps3_virq_destroy(*virq);
295 EXPORT_SYMBOL_GPL(ps3_irq_plug_setup);
298 * ps3_irq_plug_destroy - Generic outlet and virq related teardown.
299 * @virq: The assigned Linux virq.
301 * Disconnects the irq plug and tears down virq.
302 * Do not call for system bus event interrupts setup with
303 * ps3_sb_event_receive_port_setup().
306 int ps3_irq_plug_destroy(unsigned int virq)
309 const struct ps3_private *pd = get_irq_chip_data(virq);
311 pr_debug("%s:%d: node %lu, cpu %d, virq %u\n", __func__, __LINE__,
312 pd->node, pd->cpu, virq);
314 result = lv1_disconnect_irq_plug_ext(pd->node, pd->cpu, virq);
317 pr_info("%s:%d: lv1_disconnect_irq_plug_ext failed: %s\n",
318 __func__, __LINE__, ps3_result(result));
320 ps3_virq_destroy(virq);
324 EXPORT_SYMBOL_GPL(ps3_irq_plug_destroy);
327 * ps3_event_receive_port_setup - Setup an event receive port.
328 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
330 * @virq: The assigned Linux virq.
332 * The virq can be used with lv1_connect_interrupt_event_receive_port() to
333 * arrange to receive interrupts from system-bus devices, or with
334 * ps3_send_event_locally() to signal events.
337 int ps3_event_receive_port_setup(enum ps3_cpu_binding cpu, unsigned int *virq)
340 unsigned long outlet;
342 result = lv1_construct_event_receive_port(&outlet);
345 pr_debug("%s:%d: lv1_construct_event_receive_port failed: %s\n",
346 __func__, __LINE__, ps3_result(result));
351 result = ps3_irq_plug_setup(cpu, outlet, virq);
356 EXPORT_SYMBOL_GPL(ps3_event_receive_port_setup);
359 * ps3_event_receive_port_destroy - Destroy an event receive port.
360 * @virq: The assigned Linux virq.
362 * Since ps3_event_receive_port_destroy destroys the receive port outlet,
363 * SB devices need to call disconnect_interrupt_event_receive_port() before
367 int ps3_event_receive_port_destroy(unsigned int virq)
371 pr_debug(" -> %s:%d virq: %u\n", __func__, __LINE__, virq);
373 result = lv1_destruct_event_receive_port(virq_to_hw(virq));
376 pr_debug("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
377 __func__, __LINE__, ps3_result(result));
379 /* lv1_destruct_event_receive_port() destroys the IRQ plug,
380 * so don't call ps3_irq_plug_destroy() here.
383 result = ps3_virq_destroy(virq);
386 pr_debug(" <- %s:%d\n", __func__, __LINE__);
389 EXPORT_SYMBOL_GPL(ps3_event_receive_port_destroy);
391 int ps3_send_event_locally(unsigned int virq)
393 return lv1_send_event_locally(virq_to_hw(virq));
397 * ps3_sb_event_receive_port_setup - Setup a system bus event receive port.
398 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
400 * @did: The HV device identifier read from the system repository.
401 * @interrupt_id: The device interrupt id read from the system repository.
402 * @virq: The assigned Linux virq.
404 * An event irq represents a virtual device interrupt. The interrupt_id
405 * coresponds to the software interrupt number.
408 int ps3_sb_event_receive_port_setup(enum ps3_cpu_binding cpu,
409 const struct ps3_device_id *did, unsigned int interrupt_id,
412 /* this should go in system-bus.c */
416 result = ps3_event_receive_port_setup(cpu, virq);
421 result = lv1_connect_interrupt_event_receive_port(did->bus_id,
422 did->dev_id, virq_to_hw(*virq), interrupt_id);
425 pr_debug("%s:%d: lv1_connect_interrupt_event_receive_port"
426 " failed: %s\n", __func__, __LINE__,
428 ps3_event_receive_port_destroy(*virq);
433 pr_debug("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
434 interrupt_id, *virq);
438 EXPORT_SYMBOL(ps3_sb_event_receive_port_setup);
440 int ps3_sb_event_receive_port_destroy(const struct ps3_device_id *did,
441 unsigned int interrupt_id, unsigned int virq)
443 /* this should go in system-bus.c */
447 pr_debug(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
450 result = lv1_disconnect_interrupt_event_receive_port(did->bus_id,
451 did->dev_id, virq_to_hw(virq), interrupt_id);
454 pr_debug("%s:%d: lv1_disconnect_interrupt_event_receive_port"
455 " failed: %s\n", __func__, __LINE__,
458 result = ps3_event_receive_port_destroy(virq);
461 pr_debug(" <- %s:%d\n", __func__, __LINE__);
464 EXPORT_SYMBOL(ps3_sb_event_receive_port_destroy);
467 * ps3_io_irq_setup - Setup a system bus io irq.
468 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
470 * @interrupt_id: The device interrupt id read from the system repository.
471 * @virq: The assigned Linux virq.
473 * An io irq represents a non-virtualized device interrupt. interrupt_id
474 * coresponds to the interrupt number of the interrupt controller.
477 int ps3_io_irq_setup(enum ps3_cpu_binding cpu, unsigned int interrupt_id,
481 unsigned long outlet;
483 result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
486 pr_debug("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
487 __func__, __LINE__, ps3_result(result));
491 result = ps3_irq_plug_setup(cpu, outlet, virq);
496 EXPORT_SYMBOL_GPL(ps3_io_irq_setup);
498 int ps3_io_irq_destroy(unsigned int virq)
502 result = lv1_destruct_io_irq_outlet(virq_to_hw(virq));
505 pr_debug("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
506 __func__, __LINE__, ps3_result(result));
508 result = ps3_irq_plug_destroy(virq);
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,
530 unsigned long outlet;
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);
551 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);
570 * ps3_spe_irq_setup - Setup an spe virq.
571 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
573 * @spe_id: The spe_id returned from lv1_construct_logical_spe().
574 * @class: The spe interrupt class {0,1,2}.
575 * @virq: The assigned Linux virq.
579 int ps3_spe_irq_setup(enum ps3_cpu_binding cpu, unsigned long spe_id,
580 unsigned int class, unsigned int *virq)
583 unsigned long outlet;
587 result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
590 pr_debug("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
591 __func__, __LINE__, ps3_result(result));
595 result = ps3_irq_plug_setup(cpu, outlet, virq);
601 int ps3_spe_irq_destroy(unsigned int virq)
603 int result = ps3_irq_plug_destroy(virq);
609 #define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
610 #define PS3_PLUG_MAX 63
613 static void _dump_64_bmp(const char *header, const u64 *p, unsigned cpu,
614 const char* func, int line)
616 pr_debug("%s:%d: %s %u {%04lx_%04lx_%04lx_%04lx}\n",
617 func, line, header, cpu,
618 *p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff,
622 static void __maybe_unused _dump_256_bmp(const char *header,
623 const u64 *p, unsigned cpu, const char* func, int line)
625 pr_debug("%s:%d: %s %u {%016lx:%016lx:%016lx:%016lx}\n",
626 func, line, header, cpu, p[0], p[1], p[2], p[3]);
629 #define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
630 static void _dump_bmp(struct ps3_private* pd, const char* func, int line)
634 spin_lock_irqsave(&pd->bmp.lock, flags);
635 _dump_64_bmp("stat", &pd->bmp.status, pd->cpu, func, line);
636 _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
637 spin_unlock_irqrestore(&pd->bmp.lock, flags);
640 #define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
641 static void __maybe_unused _dump_mask(struct ps3_private *pd,
642 const char* func, int line)
646 spin_lock_irqsave(&pd->bmp.lock, flags);
647 _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
648 spin_unlock_irqrestore(&pd->bmp.lock, flags);
651 static void dump_bmp(struct ps3_private* pd) {};
652 #endif /* defined(DEBUG) */
654 static void ps3_host_unmap(struct irq_host *h, unsigned int virq)
656 set_irq_chip_data(virq, NULL);
659 static int ps3_host_map(struct irq_host *h, unsigned int virq,
660 irq_hw_number_t hwirq)
662 pr_debug("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq,
665 set_irq_chip_and_handler(virq, &irq_chip, handle_fasteoi_irq);
670 static struct irq_host_ops ps3_host_ops = {
672 .unmap = ps3_host_unmap,
675 void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
677 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
679 pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq;
681 pr_debug("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__,
682 cpu, virq, pd->bmp.ipi_debug_brk_mask);
685 unsigned int ps3_get_irq(void)
687 struct ps3_private *pd = &__get_cpu_var(ps3_private);
688 u64 x = (pd->bmp.status & pd->bmp.mask);
691 /* check for ipi break first to stop this cpu ASAP */
693 if (x & pd->bmp.ipi_debug_brk_mask)
694 x &= pd->bmp.ipi_debug_brk_mask;
696 asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x));
699 if (unlikely(plug) == NO_IRQ) {
700 pr_debug("%s:%d: no plug found: cpu %u\n", __func__, __LINE__,
702 dump_bmp(&per_cpu(ps3_private, 0));
703 dump_bmp(&per_cpu(ps3_private, 1));
708 if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) {
709 dump_bmp(&per_cpu(ps3_private, 0));
710 dump_bmp(&per_cpu(ps3_private, 1));
717 void __init ps3_init_IRQ(void)
721 struct irq_host *host;
723 host = irq_alloc_host(IRQ_HOST_MAP_NOMAP, 0, &ps3_host_ops,
725 irq_set_default_host(host);
726 irq_set_virq_count(PS3_PLUG_MAX + 1);
728 for_each_possible_cpu(cpu) {
729 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
731 lv1_get_logical_ppe_id(&pd->node);
732 pd->cpu = get_hard_smp_processor_id(cpu);
733 spin_lock_init(&pd->bmp.lock);
735 pr_debug("%s:%d: node %lu, cpu %d, bmp %lxh\n", __func__,
736 __LINE__, pd->node, pd->cpu,
737 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
739 result = lv1_configure_irq_state_bitmap(pd->node, pd->cpu,
740 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
743 pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
744 " %s\n", __func__, __LINE__,
748 ppc_md.get_irq = ps3_get_irq;