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>
28 #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);
93 int ps3_alloc_irq(enum ps3_cpu_binding cpu, unsigned long outlet,
97 struct ps3_private *pd;
99 /* This defines the default interrupt distribution policy. */
101 if (cpu == PS3_BINDING_CPU_ANY)
104 pd = &per_cpu(ps3_private, cpu);
106 *virq = irq_create_mapping(NULL, outlet);
108 if (*virq == NO_IRQ) {
109 pr_debug("%s:%d: irq_create_mapping failed: outlet %lu\n",
110 __func__, __LINE__, outlet);
115 /* Binds outlet to cpu + virq. */
117 result = lv1_connect_irq_plug_ext(pd->node, pd->cpu, *virq, outlet, 0);
120 pr_info("%s:%d: lv1_connect_irq_plug_ext failed: %s\n",
121 __func__, __LINE__, ps3_result(result));
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 lv1_disconnect_irq_plug_ext(pd->node, pd->cpu, *virq);
142 irq_dispose_mapping(*virq);
146 EXPORT_SYMBOL_GPL(ps3_alloc_irq);
148 int ps3_free_irq(unsigned int virq)
151 const struct ps3_private *pd = get_irq_chip_data(virq);
153 pr_debug("%s:%d: node %lu, cpu %d, virq %u\n", __func__, __LINE__,
154 pd->node, pd->cpu, virq);
156 result = lv1_disconnect_irq_plug_ext(pd->node, pd->cpu, virq);
159 pr_info("%s:%d: lv1_disconnect_irq_plug_ext failed: %s\n",
160 __func__, __LINE__, ps3_result(result));
162 set_irq_chip_data(virq, NULL);
163 irq_dispose_mapping(virq);
166 EXPORT_SYMBOL_GPL(ps3_free_irq);
169 * ps3_alloc_io_irq - Assign a virq to a system bus device.
170 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
172 * @interrupt_id: The device interrupt id read from the system repository.
173 * @virq: The assigned Linux virq.
175 * An io irq represents a non-virtualized device interrupt. interrupt_id
176 * coresponds to the interrupt number of the interrupt controller.
179 int ps3_alloc_io_irq(enum ps3_cpu_binding cpu, unsigned int interrupt_id,
183 unsigned long outlet;
185 result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
188 pr_debug("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
189 __func__, __LINE__, ps3_result(result));
193 result = ps3_alloc_irq(cpu, outlet, virq);
199 int ps3_free_io_irq(unsigned int virq)
203 result = lv1_destruct_io_irq_outlet(virq_to_hw(virq));
206 pr_debug("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
207 __func__, __LINE__, ps3_result(result));
215 * ps3_alloc_event_irq - Allocate a virq for use with a system event.
216 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
218 * @virq: The assigned Linux virq.
220 * The virq can be used with lv1_connect_interrupt_event_receive_port() to
221 * arrange to receive events, or with ps3_send_event_locally() to signal
225 int ps3_alloc_event_irq(enum ps3_cpu_binding cpu, unsigned int *virq)
228 unsigned long outlet;
230 result = lv1_construct_event_receive_port(&outlet);
233 pr_debug("%s:%d: lv1_construct_event_receive_port failed: %s\n",
234 __func__, __LINE__, ps3_result(result));
239 result = ps3_alloc_irq(cpu, outlet, virq);
245 int ps3_free_event_irq(unsigned int virq)
249 pr_debug(" -> %s:%d\n", __func__, __LINE__);
251 result = lv1_destruct_event_receive_port(virq_to_hw(virq));
254 pr_debug("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
255 __func__, __LINE__, ps3_result(result));
259 pr_debug(" <- %s:%d\n", __func__, __LINE__);
263 int ps3_send_event_locally(unsigned int virq)
265 return lv1_send_event_locally(virq_to_hw(virq));
269 * ps3_connect_event_irq - Assign a virq to a system bus device.
270 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
272 * @did: The HV device identifier read from the system repository.
273 * @interrupt_id: The device interrupt id read from the system repository.
274 * @virq: The assigned Linux virq.
276 * An event irq represents a virtual device interrupt. The interrupt_id
277 * coresponds to the software interrupt number.
280 int ps3_connect_event_irq(enum ps3_cpu_binding cpu,
281 const struct ps3_device_id *did, unsigned int interrupt_id,
286 result = ps3_alloc_event_irq(cpu, virq);
291 result = lv1_connect_interrupt_event_receive_port(did->bus_id,
292 did->dev_id, virq_to_hw(*virq), interrupt_id);
295 pr_debug("%s:%d: lv1_connect_interrupt_event_receive_port"
296 " failed: %s\n", __func__, __LINE__,
298 ps3_free_event_irq(*virq);
303 pr_debug("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
304 interrupt_id, *virq);
309 int ps3_disconnect_event_irq(const struct ps3_device_id *did,
310 unsigned int interrupt_id, unsigned int virq)
314 pr_debug(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
317 result = lv1_disconnect_interrupt_event_receive_port(did->bus_id,
318 did->dev_id, virq_to_hw(virq), interrupt_id);
321 pr_debug("%s:%d: lv1_disconnect_interrupt_event_receive_port"
322 " failed: %s\n", __func__, __LINE__,
325 ps3_free_event_irq(virq);
327 pr_debug(" <- %s:%d\n", __func__, __LINE__);
332 * ps3_alloc_vuart_irq - Configure the system virtual uart virq.
333 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
335 * @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap.
336 * @virq: The assigned Linux virq.
338 * The system supports only a single virtual uart, so multiple calls without
339 * freeing the interrupt will return a wrong state error.
342 int ps3_alloc_vuart_irq(enum ps3_cpu_binding cpu, void* virt_addr_bmp,
346 unsigned long outlet;
349 BUG_ON(!is_kernel_addr((u64)virt_addr_bmp));
351 lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp));
353 result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet);
356 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
357 __func__, __LINE__, ps3_result(result));
361 result = ps3_alloc_irq(cpu, outlet, virq);
367 int ps3_free_vuart_irq(unsigned int virq)
371 result = lv1_deconfigure_virtual_uart_irq();
374 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
375 __func__, __LINE__, ps3_result(result));
385 * ps3_alloc_spe_irq - Configure an spe virq.
386 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
388 * @spe_id: The spe_id returned from lv1_construct_logical_spe().
389 * @class: The spe interrupt class {0,1,2}.
390 * @virq: The assigned Linux virq.
394 int ps3_alloc_spe_irq(enum ps3_cpu_binding cpu, unsigned long spe_id,
395 unsigned int class, unsigned int *virq)
398 unsigned long outlet;
402 result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
405 pr_debug("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
406 __func__, __LINE__, ps3_result(result));
410 result = ps3_alloc_irq(cpu, outlet, virq);
416 int ps3_free_spe_irq(unsigned int virq)
423 #define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
424 #define PS3_PLUG_MAX 63
427 static void _dump_64_bmp(const char *header, const u64 *p, unsigned cpu,
428 const char* func, int line)
430 pr_debug("%s:%d: %s %u {%04lx_%04lx_%04lx_%04lx}\n",
431 func, line, header, cpu,
432 *p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff,
436 static void __attribute__ ((unused)) _dump_256_bmp(const char *header,
437 const u64 *p, unsigned cpu, const char* func, int line)
439 pr_debug("%s:%d: %s %u {%016lx:%016lx:%016lx:%016lx}\n",
440 func, line, header, cpu, p[0], p[1], p[2], p[3]);
443 #define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
444 static void _dump_bmp(struct ps3_private* pd, const char* func, int line)
448 spin_lock_irqsave(&pd->bmp.lock, flags);
449 _dump_64_bmp("stat", &pd->bmp.status, pd->cpu, func, line);
450 _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
451 spin_unlock_irqrestore(&pd->bmp.lock, flags);
454 #define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
455 static void __attribute__ ((unused)) _dump_mask(struct ps3_private* pd,
456 const char* func, int line)
460 spin_lock_irqsave(&pd->bmp.lock, flags);
461 _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
462 spin_unlock_irqrestore(&pd->bmp.lock, flags);
465 static void dump_bmp(struct ps3_private* pd) {};
466 #endif /* defined(DEBUG) */
468 static void ps3_chip_mask(unsigned int virq)
470 struct ps3_private *pd = get_irq_chip_data(virq);
471 u64 bit = 0x8000000000000000UL >> virq;
472 u64 *p = &pd->bmp.mask;
476 pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
478 local_irq_save(flags);
484 : "=&r" (old), "+m" (*p)
488 lv1_did_update_interrupt_mask(pd->node, pd->cpu);
489 local_irq_restore(flags);
492 static void ps3_chip_unmask(unsigned int virq)
494 struct ps3_private *pd = get_irq_chip_data(virq);
495 u64 bit = 0x8000000000000000UL >> virq;
496 u64 *p = &pd->bmp.mask;
500 pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
502 local_irq_save(flags);
508 : "=&r" (old), "+m" (*p)
512 lv1_did_update_interrupt_mask(pd->node, pd->cpu);
513 local_irq_restore(flags);
516 static void ps3_chip_eoi(unsigned int virq)
518 const struct ps3_private *pd = get_irq_chip_data(virq);
519 lv1_end_of_interrupt_ext(pd->node, pd->cpu, virq);
522 static struct irq_chip irq_chip = {
524 .mask = ps3_chip_mask,
525 .unmask = ps3_chip_unmask,
529 static void ps3_host_unmap(struct irq_host *h, unsigned int virq)
531 set_irq_chip_data(virq, NULL);
534 static int ps3_host_map(struct irq_host *h, unsigned int virq,
535 irq_hw_number_t hwirq)
537 pr_debug("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq,
540 set_irq_chip_and_handler(virq, &irq_chip, handle_fasteoi_irq);
545 static struct irq_host_ops ps3_host_ops = {
547 .unmap = ps3_host_unmap,
550 void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
552 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
554 pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq;
556 pr_debug("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__,
557 cpu, virq, pd->bmp.ipi_debug_brk_mask);
560 unsigned int ps3_get_irq(void)
562 struct ps3_private *pd = &__get_cpu_var(ps3_private);
563 u64 x = (pd->bmp.status & pd->bmp.mask);
566 /* check for ipi break first to stop this cpu ASAP */
568 if (x & pd->bmp.ipi_debug_brk_mask)
569 x &= pd->bmp.ipi_debug_brk_mask;
571 asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x));
574 if (unlikely(plug) == NO_IRQ) {
575 pr_debug("%s:%d: no plug found: cpu %u\n", __func__, __LINE__,
577 dump_bmp(&per_cpu(ps3_private, 0));
578 dump_bmp(&per_cpu(ps3_private, 1));
583 if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) {
584 dump_bmp(&per_cpu(ps3_private, 0));
585 dump_bmp(&per_cpu(ps3_private, 1));
592 void __init ps3_init_IRQ(void)
596 struct irq_host *host;
598 host = irq_alloc_host(IRQ_HOST_MAP_NOMAP, 0, &ps3_host_ops,
600 irq_set_default_host(host);
601 irq_set_virq_count(PS3_PLUG_MAX + 1);
603 for_each_possible_cpu(cpu) {
604 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
606 lv1_get_logical_ppe_id(&pd->node);
607 pd->cpu = get_hard_smp_processor_id(cpu);
608 spin_lock_init(&pd->bmp.lock);
610 pr_debug("%s:%d: node %lu, cpu %d, bmp %lxh\n", __func__,
611 __LINE__, pd->node, pd->cpu,
612 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
614 result = lv1_configure_irq_state_bitmap(pd->node, pd->cpu,
615 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
618 pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
619 " %s\n", __func__, __LINE__,
623 ppc_md.get_irq = ps3_get_irq;