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);
93 * ps3_virq_setup - virq related setup.
94 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
96 * @outlet: The HV outlet from the various create outlet routines.
97 * @virq: The assigned Linux virq.
99 * Calls irq_create_mapping() to get a virq and sets the chip data to
103 int ps3_virq_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
107 struct ps3_private *pd;
109 /* This defines the default interrupt distribution policy. */
111 if (cpu == PS3_BINDING_CPU_ANY)
114 pd = &per_cpu(ps3_private, cpu);
116 *virq = irq_create_mapping(NULL, outlet);
118 if (*virq == NO_IRQ) {
119 pr_debug("%s:%d: irq_create_mapping failed: outlet %lu\n",
120 __func__, __LINE__, outlet);
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 irq_dispose_mapping(*virq);
145 * ps3_virq_destroy - virq related teardown.
146 * @virq: The assigned Linux virq.
148 * Clears chip data and calls irq_dispose_mapping() for the virq.
151 int ps3_virq_destroy(unsigned int virq)
153 const struct ps3_private *pd = get_irq_chip_data(virq);
155 pr_debug("%s:%d: node %lu, cpu %d, virq %u\n", __func__, __LINE__,
156 pd->node, pd->cpu, virq);
158 set_irq_chip_data(virq, NULL);
159 irq_dispose_mapping(virq);
161 pr_debug("%s:%d <-\n", __func__, __LINE__);
166 * ps3_irq_plug_setup - Generic outlet and virq related setup.
167 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
169 * @outlet: The HV outlet from the various create outlet routines.
170 * @virq: The assigned Linux virq.
172 * Sets up virq and connects the irq plug.
175 int ps3_irq_plug_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
179 struct ps3_private *pd;
181 result = ps3_virq_setup(cpu, outlet, virq);
184 pr_debug("%s:%d: ps3_virq_setup failed\n", __func__, __LINE__);
188 pd = get_irq_chip_data(*virq);
190 /* Binds outlet to cpu + virq. */
192 result = lv1_connect_irq_plug_ext(pd->node, pd->cpu, *virq, outlet, 0);
195 pr_info("%s:%d: lv1_connect_irq_plug_ext failed: %s\n",
196 __func__, __LINE__, ps3_result(result));
204 ps3_virq_destroy(*virq);
208 EXPORT_SYMBOL_GPL(ps3_irq_plug_setup);
211 * ps3_irq_plug_destroy - Generic outlet and virq related teardown.
212 * @virq: The assigned Linux virq.
214 * Disconnects the irq plug and tears down virq.
215 * Do not call for system bus event interrupts setup with
216 * ps3_sb_event_receive_port_setup().
219 int ps3_irq_plug_destroy(unsigned int virq)
222 const struct ps3_private *pd = get_irq_chip_data(virq);
224 pr_debug("%s:%d: node %lu, cpu %d, virq %u\n", __func__, __LINE__,
225 pd->node, pd->cpu, virq);
227 result = lv1_disconnect_irq_plug_ext(pd->node, pd->cpu, virq);
230 pr_info("%s:%d: lv1_disconnect_irq_plug_ext failed: %s\n",
231 __func__, __LINE__, ps3_result(result));
233 ps3_virq_destroy(virq);
237 EXPORT_SYMBOL_GPL(ps3_irq_plug_destroy);
240 * ps3_event_receive_port_setup - Setup an event receive port.
241 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
243 * @virq: The assigned Linux virq.
245 * The virq can be used with lv1_connect_interrupt_event_receive_port() to
246 * arrange to receive interrupts from system-bus devices, or with
247 * ps3_send_event_locally() to signal events.
250 int ps3_event_receive_port_setup(enum ps3_cpu_binding cpu, unsigned int *virq)
253 unsigned long outlet;
255 result = lv1_construct_event_receive_port(&outlet);
258 pr_debug("%s:%d: lv1_construct_event_receive_port failed: %s\n",
259 __func__, __LINE__, ps3_result(result));
264 result = ps3_irq_plug_setup(cpu, outlet, virq);
269 EXPORT_SYMBOL_GPL(ps3_event_receive_port_setup);
272 * ps3_event_receive_port_destroy - Destroy an event receive port.
273 * @virq: The assigned Linux virq.
275 * Since ps3_event_receive_port_destroy destroys the receive port outlet,
276 * SB devices need to call disconnect_interrupt_event_receive_port() before
280 int ps3_event_receive_port_destroy(unsigned int virq)
284 pr_debug(" -> %s:%d virq: %u\n", __func__, __LINE__, virq);
286 result = lv1_destruct_event_receive_port(virq_to_hw(virq));
289 pr_debug("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
290 __func__, __LINE__, ps3_result(result));
292 /* lv1_destruct_event_receive_port() destroys the IRQ plug,
293 * so don't call ps3_irq_plug_destroy() here.
296 result = ps3_virq_destroy(virq);
299 pr_debug(" <- %s:%d\n", __func__, __LINE__);
302 EXPORT_SYMBOL_GPL(ps3_event_receive_port_destroy);
304 int ps3_send_event_locally(unsigned int virq)
306 return lv1_send_event_locally(virq_to_hw(virq));
310 * ps3_sb_event_receive_port_setup - Setup a system bus event receive port.
311 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
313 * @did: The HV device identifier read from the system repository.
314 * @interrupt_id: The device interrupt id read from the system repository.
315 * @virq: The assigned Linux virq.
317 * An event irq represents a virtual device interrupt. The interrupt_id
318 * coresponds to the software interrupt number.
321 int ps3_sb_event_receive_port_setup(enum ps3_cpu_binding cpu,
322 const struct ps3_device_id *did, unsigned int interrupt_id,
325 /* this should go in system-bus.c */
329 result = ps3_event_receive_port_setup(cpu, virq);
334 result = lv1_connect_interrupt_event_receive_port(did->bus_id,
335 did->dev_id, virq_to_hw(*virq), interrupt_id);
338 pr_debug("%s:%d: lv1_connect_interrupt_event_receive_port"
339 " failed: %s\n", __func__, __LINE__,
341 ps3_event_receive_port_destroy(*virq);
346 pr_debug("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
347 interrupt_id, *virq);
351 EXPORT_SYMBOL(ps3_sb_event_receive_port_setup);
353 int ps3_sb_event_receive_port_destroy(const struct ps3_device_id *did,
354 unsigned int interrupt_id, unsigned int virq)
356 /* this should go in system-bus.c */
360 pr_debug(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
363 result = lv1_disconnect_interrupt_event_receive_port(did->bus_id,
364 did->dev_id, virq_to_hw(virq), interrupt_id);
367 pr_debug("%s:%d: lv1_disconnect_interrupt_event_receive_port"
368 " failed: %s\n", __func__, __LINE__,
371 result = ps3_event_receive_port_destroy(virq);
374 pr_debug(" <- %s:%d\n", __func__, __LINE__);
377 EXPORT_SYMBOL(ps3_sb_event_receive_port_destroy);
380 * ps3_io_irq_setup - Setup a system bus io irq.
381 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
383 * @interrupt_id: The device interrupt id read from the system repository.
384 * @virq: The assigned Linux virq.
386 * An io irq represents a non-virtualized device interrupt. interrupt_id
387 * coresponds to the interrupt number of the interrupt controller.
390 int ps3_io_irq_setup(enum ps3_cpu_binding cpu, unsigned int interrupt_id,
394 unsigned long outlet;
396 result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
399 pr_debug("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
400 __func__, __LINE__, ps3_result(result));
404 result = ps3_irq_plug_setup(cpu, outlet, virq);
409 EXPORT_SYMBOL_GPL(ps3_io_irq_setup);
411 int ps3_io_irq_destroy(unsigned int virq)
415 result = lv1_destruct_io_irq_outlet(virq_to_hw(virq));
418 pr_debug("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
419 __func__, __LINE__, ps3_result(result));
421 result = ps3_irq_plug_destroy(virq);
426 EXPORT_SYMBOL_GPL(ps3_io_irq_destroy);
429 * ps3_vuart_irq_setup - Setup the system virtual uart virq.
430 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
432 * @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap.
433 * @virq: The assigned Linux virq.
435 * The system supports only a single virtual uart, so multiple calls without
436 * freeing the interrupt will return a wrong state error.
439 int ps3_vuart_irq_setup(enum ps3_cpu_binding cpu, void* virt_addr_bmp,
443 unsigned long outlet;
446 BUG_ON(!is_kernel_addr((u64)virt_addr_bmp));
448 lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp));
450 result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet);
453 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
454 __func__, __LINE__, ps3_result(result));
458 result = ps3_irq_plug_setup(cpu, outlet, virq);
464 int ps3_vuart_irq_destroy(unsigned int virq)
468 result = lv1_deconfigure_virtual_uart_irq();
471 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
472 __func__, __LINE__, ps3_result(result));
476 result = ps3_irq_plug_destroy(virq);
483 * ps3_spe_irq_setup - Setup an spe virq.
484 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
486 * @spe_id: The spe_id returned from lv1_construct_logical_spe().
487 * @class: The spe interrupt class {0,1,2}.
488 * @virq: The assigned Linux virq.
492 int ps3_spe_irq_setup(enum ps3_cpu_binding cpu, unsigned long spe_id,
493 unsigned int class, unsigned int *virq)
496 unsigned long outlet;
500 result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
503 pr_debug("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
504 __func__, __LINE__, ps3_result(result));
508 result = ps3_irq_plug_setup(cpu, outlet, virq);
514 int ps3_spe_irq_destroy(unsigned int virq)
516 int result = ps3_irq_plug_destroy(virq);
522 #define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
523 #define PS3_PLUG_MAX 63
526 static void _dump_64_bmp(const char *header, const u64 *p, unsigned cpu,
527 const char* func, int line)
529 pr_debug("%s:%d: %s %u {%04lx_%04lx_%04lx_%04lx}\n",
530 func, line, header, cpu,
531 *p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff,
535 static void __attribute__ ((unused)) _dump_256_bmp(const char *header,
536 const u64 *p, unsigned cpu, const char* func, int line)
538 pr_debug("%s:%d: %s %u {%016lx:%016lx:%016lx:%016lx}\n",
539 func, line, header, cpu, p[0], p[1], p[2], p[3]);
542 #define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
543 static void _dump_bmp(struct ps3_private* pd, const char* func, int line)
547 spin_lock_irqsave(&pd->bmp.lock, flags);
548 _dump_64_bmp("stat", &pd->bmp.status, pd->cpu, func, line);
549 _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
550 spin_unlock_irqrestore(&pd->bmp.lock, flags);
553 #define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
554 static void __attribute__ ((unused)) _dump_mask(struct ps3_private* pd,
555 const char* func, int line)
559 spin_lock_irqsave(&pd->bmp.lock, flags);
560 _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
561 spin_unlock_irqrestore(&pd->bmp.lock, flags);
564 static void dump_bmp(struct ps3_private* pd) {};
565 #endif /* defined(DEBUG) */
567 static void ps3_chip_mask(unsigned int virq)
569 struct ps3_private *pd = get_irq_chip_data(virq);
570 u64 bit = 0x8000000000000000UL >> virq;
571 u64 *p = &pd->bmp.mask;
575 pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
577 local_irq_save(flags);
583 : "=&r" (old), "+m" (*p)
587 lv1_did_update_interrupt_mask(pd->node, pd->cpu);
588 local_irq_restore(flags);
591 static void ps3_chip_unmask(unsigned int virq)
593 struct ps3_private *pd = get_irq_chip_data(virq);
594 u64 bit = 0x8000000000000000UL >> virq;
595 u64 *p = &pd->bmp.mask;
599 pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
601 local_irq_save(flags);
607 : "=&r" (old), "+m" (*p)
611 lv1_did_update_interrupt_mask(pd->node, pd->cpu);
612 local_irq_restore(flags);
615 static void ps3_chip_eoi(unsigned int virq)
617 const struct ps3_private *pd = get_irq_chip_data(virq);
618 lv1_end_of_interrupt_ext(pd->node, pd->cpu, virq);
621 static struct irq_chip irq_chip = {
623 .mask = ps3_chip_mask,
624 .unmask = ps3_chip_unmask,
628 static void ps3_host_unmap(struct irq_host *h, unsigned int virq)
630 set_irq_chip_data(virq, NULL);
633 static int ps3_host_map(struct irq_host *h, unsigned int virq,
634 irq_hw_number_t hwirq)
636 pr_debug("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq,
639 set_irq_chip_and_handler(virq, &irq_chip, handle_fasteoi_irq);
644 static struct irq_host_ops ps3_host_ops = {
646 .unmap = ps3_host_unmap,
649 void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
651 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
653 pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq;
655 pr_debug("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__,
656 cpu, virq, pd->bmp.ipi_debug_brk_mask);
659 unsigned int ps3_get_irq(void)
661 struct ps3_private *pd = &__get_cpu_var(ps3_private);
662 u64 x = (pd->bmp.status & pd->bmp.mask);
665 /* check for ipi break first to stop this cpu ASAP */
667 if (x & pd->bmp.ipi_debug_brk_mask)
668 x &= pd->bmp.ipi_debug_brk_mask;
670 asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x));
673 if (unlikely(plug) == NO_IRQ) {
674 pr_debug("%s:%d: no plug found: cpu %u\n", __func__, __LINE__,
676 dump_bmp(&per_cpu(ps3_private, 0));
677 dump_bmp(&per_cpu(ps3_private, 1));
682 if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) {
683 dump_bmp(&per_cpu(ps3_private, 0));
684 dump_bmp(&per_cpu(ps3_private, 1));
691 void __init ps3_init_IRQ(void)
695 struct irq_host *host;
697 host = irq_alloc_host(IRQ_HOST_MAP_NOMAP, 0, &ps3_host_ops,
699 irq_set_default_host(host);
700 irq_set_virq_count(PS3_PLUG_MAX + 1);
702 for_each_possible_cpu(cpu) {
703 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
705 lv1_get_logical_ppe_id(&pd->node);
706 pd->cpu = get_hard_smp_processor_id(cpu);
707 spin_lock_init(&pd->bmp.lock);
709 pr_debug("%s:%d: node %lu, cpu %d, bmp %lxh\n", __func__,
710 __LINE__, pd->node, pd->cpu,
711 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
713 result = lv1_configure_irq_state_bitmap(pd->node, pd->cpu,
714 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
717 pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
718 " %s\n", __func__, __LINE__,
722 ppc_md.get_irq = ps3_get_irq;