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_virq_setup - virq related setup.
95 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
97 * @outlet: The HV outlet from the various create outlet routines.
98 * @virq: The assigned Linux virq.
100 * Calls irq_create_mapping() to get a virq and sets the chip data to
104 int ps3_virq_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
108 struct ps3_private *pd;
110 /* This defines the default interrupt distribution policy. */
112 if (cpu == PS3_BINDING_CPU_ANY)
115 pd = &per_cpu(ps3_private, cpu);
117 *virq = irq_create_mapping(NULL, outlet);
119 if (*virq == NO_IRQ) {
120 pr_debug("%s:%d: irq_create_mapping failed: outlet %lu\n",
121 __func__, __LINE__, outlet);
126 pr_debug("%s:%d: outlet %lu => cpu %u, virq %u\n", __func__, __LINE__,
129 result = set_irq_chip_data(*virq, pd);
132 pr_debug("%s:%d: set_irq_chip_data failed\n",
140 irq_dispose_mapping(*virq);
146 * ps3_virq_destroy - virq related teardown.
147 * @virq: The assigned Linux virq.
149 * Clears chip data and calls irq_dispose_mapping() for the virq.
152 int ps3_virq_destroy(unsigned int virq)
154 const struct ps3_private *pd = get_irq_chip_data(virq);
156 pr_debug("%s:%d: node %lu, cpu %d, virq %u\n", __func__, __LINE__,
157 pd->node, pd->cpu, virq);
159 set_irq_chip_data(virq, NULL);
160 irq_dispose_mapping(virq);
162 pr_debug("%s:%d <-\n", __func__, __LINE__);
167 * ps3_irq_plug_setup - Generic outlet and virq related setup.
168 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
170 * @outlet: The HV outlet from the various create outlet routines.
171 * @virq: The assigned Linux virq.
173 * Sets up virq and connects the irq plug.
176 int ps3_irq_plug_setup(enum ps3_cpu_binding cpu, unsigned long outlet,
180 struct ps3_private *pd;
182 result = ps3_virq_setup(cpu, outlet, virq);
185 pr_debug("%s:%d: ps3_virq_setup failed\n", __func__, __LINE__);
189 pd = get_irq_chip_data(*virq);
191 /* Binds outlet to cpu + virq. */
193 result = lv1_connect_irq_plug_ext(pd->node, pd->cpu, *virq, outlet, 0);
196 pr_info("%s:%d: lv1_connect_irq_plug_ext failed: %s\n",
197 __func__, __LINE__, ps3_result(result));
205 ps3_virq_destroy(*virq);
209 EXPORT_SYMBOL_GPL(ps3_irq_plug_setup);
212 * ps3_irq_plug_destroy - Generic outlet and virq related teardown.
213 * @virq: The assigned Linux virq.
215 * Disconnects the irq plug and tears down virq.
216 * Do not call for system bus event interrupts setup with
217 * ps3_sb_event_receive_port_setup().
220 int ps3_irq_plug_destroy(unsigned int virq)
223 const struct ps3_private *pd = get_irq_chip_data(virq);
225 pr_debug("%s:%d: node %lu, cpu %d, virq %u\n", __func__, __LINE__,
226 pd->node, pd->cpu, virq);
228 result = lv1_disconnect_irq_plug_ext(pd->node, pd->cpu, virq);
231 pr_info("%s:%d: lv1_disconnect_irq_plug_ext failed: %s\n",
232 __func__, __LINE__, ps3_result(result));
234 ps3_virq_destroy(virq);
238 EXPORT_SYMBOL_GPL(ps3_irq_plug_destroy);
241 * ps3_event_receive_port_setup - Setup an event receive port.
242 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
244 * @virq: The assigned Linux virq.
246 * The virq can be used with lv1_connect_interrupt_event_receive_port() to
247 * arrange to receive interrupts from system-bus devices, or with
248 * ps3_send_event_locally() to signal events.
251 int ps3_event_receive_port_setup(enum ps3_cpu_binding cpu, unsigned int *virq)
254 unsigned long outlet;
256 result = lv1_construct_event_receive_port(&outlet);
259 pr_debug("%s:%d: lv1_construct_event_receive_port failed: %s\n",
260 __func__, __LINE__, ps3_result(result));
265 result = ps3_irq_plug_setup(cpu, outlet, virq);
270 EXPORT_SYMBOL_GPL(ps3_event_receive_port_setup);
273 * ps3_event_receive_port_destroy - Destroy an event receive port.
274 * @virq: The assigned Linux virq.
276 * Since ps3_event_receive_port_destroy destroys the receive port outlet,
277 * SB devices need to call disconnect_interrupt_event_receive_port() before
281 int ps3_event_receive_port_destroy(unsigned int virq)
285 pr_debug(" -> %s:%d virq: %u\n", __func__, __LINE__, virq);
287 result = lv1_destruct_event_receive_port(virq_to_hw(virq));
290 pr_debug("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
291 __func__, __LINE__, ps3_result(result));
293 /* lv1_destruct_event_receive_port() destroys the IRQ plug,
294 * so don't call ps3_irq_plug_destroy() here.
297 result = ps3_virq_destroy(virq);
300 pr_debug(" <- %s:%d\n", __func__, __LINE__);
303 EXPORT_SYMBOL_GPL(ps3_event_receive_port_destroy);
305 int ps3_send_event_locally(unsigned int virq)
307 return lv1_send_event_locally(virq_to_hw(virq));
311 * ps3_sb_event_receive_port_setup - Setup a system bus event receive port.
312 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
314 * @did: The HV device identifier read from the system repository.
315 * @interrupt_id: The device interrupt id read from the system repository.
316 * @virq: The assigned Linux virq.
318 * An event irq represents a virtual device interrupt. The interrupt_id
319 * coresponds to the software interrupt number.
322 int ps3_sb_event_receive_port_setup(enum ps3_cpu_binding cpu,
323 const struct ps3_device_id *did, unsigned int interrupt_id,
326 /* this should go in system-bus.c */
330 result = ps3_event_receive_port_setup(cpu, virq);
335 result = lv1_connect_interrupt_event_receive_port(did->bus_id,
336 did->dev_id, virq_to_hw(*virq), interrupt_id);
339 pr_debug("%s:%d: lv1_connect_interrupt_event_receive_port"
340 " failed: %s\n", __func__, __LINE__,
342 ps3_event_receive_port_destroy(*virq);
347 pr_debug("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
348 interrupt_id, *virq);
352 EXPORT_SYMBOL(ps3_sb_event_receive_port_setup);
354 int ps3_sb_event_receive_port_destroy(const struct ps3_device_id *did,
355 unsigned int interrupt_id, unsigned int virq)
357 /* this should go in system-bus.c */
361 pr_debug(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
364 result = lv1_disconnect_interrupt_event_receive_port(did->bus_id,
365 did->dev_id, virq_to_hw(virq), interrupt_id);
368 pr_debug("%s:%d: lv1_disconnect_interrupt_event_receive_port"
369 " failed: %s\n", __func__, __LINE__,
372 result = ps3_event_receive_port_destroy(virq);
375 pr_debug(" <- %s:%d\n", __func__, __LINE__);
378 EXPORT_SYMBOL(ps3_sb_event_receive_port_destroy);
381 * ps3_io_irq_setup - Setup a system bus io irq.
382 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
384 * @interrupt_id: The device interrupt id read from the system repository.
385 * @virq: The assigned Linux virq.
387 * An io irq represents a non-virtualized device interrupt. interrupt_id
388 * coresponds to the interrupt number of the interrupt controller.
391 int ps3_io_irq_setup(enum ps3_cpu_binding cpu, unsigned int interrupt_id,
395 unsigned long outlet;
397 result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
400 pr_debug("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
401 __func__, __LINE__, ps3_result(result));
405 result = ps3_irq_plug_setup(cpu, outlet, virq);
410 EXPORT_SYMBOL_GPL(ps3_io_irq_setup);
412 int ps3_io_irq_destroy(unsigned int virq)
416 result = lv1_destruct_io_irq_outlet(virq_to_hw(virq));
419 pr_debug("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
420 __func__, __LINE__, ps3_result(result));
422 result = ps3_irq_plug_destroy(virq);
427 EXPORT_SYMBOL_GPL(ps3_io_irq_destroy);
430 * ps3_vuart_irq_setup - Setup the system virtual uart virq.
431 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
433 * @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap.
434 * @virq: The assigned Linux virq.
436 * The system supports only a single virtual uart, so multiple calls without
437 * freeing the interrupt will return a wrong state error.
440 int ps3_vuart_irq_setup(enum ps3_cpu_binding cpu, void* virt_addr_bmp,
444 unsigned long outlet;
447 BUG_ON(!is_kernel_addr((u64)virt_addr_bmp));
449 lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp));
451 result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet);
454 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
455 __func__, __LINE__, ps3_result(result));
459 result = ps3_irq_plug_setup(cpu, outlet, virq);
465 int ps3_vuart_irq_destroy(unsigned int virq)
469 result = lv1_deconfigure_virtual_uart_irq();
472 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
473 __func__, __LINE__, ps3_result(result));
477 result = ps3_irq_plug_destroy(virq);
484 * ps3_spe_irq_setup - Setup an spe virq.
485 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
487 * @spe_id: The spe_id returned from lv1_construct_logical_spe().
488 * @class: The spe interrupt class {0,1,2}.
489 * @virq: The assigned Linux virq.
493 int ps3_spe_irq_setup(enum ps3_cpu_binding cpu, unsigned long spe_id,
494 unsigned int class, unsigned int *virq)
497 unsigned long outlet;
501 result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
504 pr_debug("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
505 __func__, __LINE__, ps3_result(result));
509 result = ps3_irq_plug_setup(cpu, outlet, virq);
515 int ps3_spe_irq_destroy(unsigned int virq)
517 int result = ps3_irq_plug_destroy(virq);
523 #define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
524 #define PS3_PLUG_MAX 63
527 static void _dump_64_bmp(const char *header, const u64 *p, unsigned cpu,
528 const char* func, int line)
530 pr_debug("%s:%d: %s %u {%04lx_%04lx_%04lx_%04lx}\n",
531 func, line, header, cpu,
532 *p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff,
536 static void __attribute__ ((unused)) _dump_256_bmp(const char *header,
537 const u64 *p, unsigned cpu, const char* func, int line)
539 pr_debug("%s:%d: %s %u {%016lx:%016lx:%016lx:%016lx}\n",
540 func, line, header, cpu, p[0], p[1], p[2], p[3]);
543 #define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
544 static void _dump_bmp(struct ps3_private* pd, const char* func, int line)
548 spin_lock_irqsave(&pd->bmp.lock, flags);
549 _dump_64_bmp("stat", &pd->bmp.status, pd->cpu, func, line);
550 _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
551 spin_unlock_irqrestore(&pd->bmp.lock, flags);
554 #define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
555 static void __attribute__ ((unused)) _dump_mask(struct ps3_private* pd,
556 const char* func, int line)
560 spin_lock_irqsave(&pd->bmp.lock, flags);
561 _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
562 spin_unlock_irqrestore(&pd->bmp.lock, flags);
565 static void dump_bmp(struct ps3_private* pd) {};
566 #endif /* defined(DEBUG) */
568 static void ps3_chip_mask(unsigned int virq)
570 struct ps3_private *pd = get_irq_chip_data(virq);
571 u64 bit = 0x8000000000000000UL >> virq;
572 u64 *p = &pd->bmp.mask;
576 pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
578 local_irq_save(flags);
584 : "=&r" (old), "+m" (*p)
588 lv1_did_update_interrupt_mask(pd->node, pd->cpu);
589 local_irq_restore(flags);
592 static void ps3_chip_unmask(unsigned int virq)
594 struct ps3_private *pd = get_irq_chip_data(virq);
595 u64 bit = 0x8000000000000000UL >> virq;
596 u64 *p = &pd->bmp.mask;
600 pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
602 local_irq_save(flags);
608 : "=&r" (old), "+m" (*p)
612 lv1_did_update_interrupt_mask(pd->node, pd->cpu);
613 local_irq_restore(flags);
616 static void ps3_chip_eoi(unsigned int virq)
618 const struct ps3_private *pd = get_irq_chip_data(virq);
619 lv1_end_of_interrupt_ext(pd->node, pd->cpu, virq);
622 static struct irq_chip irq_chip = {
624 .mask = ps3_chip_mask,
625 .unmask = ps3_chip_unmask,
629 static void ps3_host_unmap(struct irq_host *h, unsigned int virq)
631 set_irq_chip_data(virq, NULL);
634 static int ps3_host_map(struct irq_host *h, unsigned int virq,
635 irq_hw_number_t hwirq)
637 pr_debug("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq,
640 set_irq_chip_and_handler(virq, &irq_chip, handle_fasteoi_irq);
645 static struct irq_host_ops ps3_host_ops = {
647 .unmap = ps3_host_unmap,
650 void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
652 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
654 pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq;
656 pr_debug("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__,
657 cpu, virq, pd->bmp.ipi_debug_brk_mask);
660 unsigned int ps3_get_irq(void)
662 struct ps3_private *pd = &__get_cpu_var(ps3_private);
663 u64 x = (pd->bmp.status & pd->bmp.mask);
666 /* check for ipi break first to stop this cpu ASAP */
668 if (x & pd->bmp.ipi_debug_brk_mask)
669 x &= pd->bmp.ipi_debug_brk_mask;
671 asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x));
674 if (unlikely(plug) == NO_IRQ) {
675 pr_debug("%s:%d: no plug found: cpu %u\n", __func__, __LINE__,
677 dump_bmp(&per_cpu(ps3_private, 0));
678 dump_bmp(&per_cpu(ps3_private, 1));
683 if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) {
684 dump_bmp(&per_cpu(ps3_private, 0));
685 dump_bmp(&per_cpu(ps3_private, 1));
692 void __init ps3_init_IRQ(void)
696 struct irq_host *host;
698 host = irq_alloc_host(IRQ_HOST_MAP_NOMAP, 0, &ps3_host_ops,
700 irq_set_default_host(host);
701 irq_set_virq_count(PS3_PLUG_MAX + 1);
703 for_each_possible_cpu(cpu) {
704 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
706 lv1_get_logical_ppe_id(&pd->node);
707 pd->cpu = get_hard_smp_processor_id(cpu);
708 spin_lock_init(&pd->bmp.lock);
710 pr_debug("%s:%d: node %lu, cpu %d, bmp %lxh\n", __func__,
711 __LINE__, pd->node, pd->cpu,
712 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
714 result = lv1_configure_irq_state_bitmap(pd->node, pd->cpu,
715 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
718 pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
719 " %s\n", __func__, __LINE__,
723 ppc_md.get_irq = ps3_get_irq;