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);
92 int ps3_alloc_irq(enum ps3_cpu_binding cpu, unsigned long outlet,
96 struct ps3_private *pd;
98 /* This defines the default interrupt distribution policy. */
100 if (cpu == PS3_BINDING_CPU_ANY)
103 pd = &per_cpu(ps3_private, cpu);
105 *virq = irq_create_mapping(NULL, outlet);
107 if (*virq == NO_IRQ) {
108 pr_debug("%s:%d: irq_create_mapping failed: outlet %lu\n",
109 __func__, __LINE__, outlet);
114 /* Binds outlet to cpu + virq. */
116 result = lv1_connect_irq_plug_ext(pd->node, pd->cpu, *virq, outlet, 0);
119 pr_info("%s:%d: lv1_connect_irq_plug_ext failed: %s\n",
120 __func__, __LINE__, ps3_result(result));
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 lv1_disconnect_irq_plug_ext(pd->node, pd->cpu, *virq);
141 irq_dispose_mapping(*virq);
145 EXPORT_SYMBOL_GPL(ps3_alloc_irq);
147 int ps3_free_irq(unsigned int virq)
150 const struct ps3_private *pd = get_irq_chip_data(virq);
152 pr_debug("%s:%d: node %lu, cpu %d, virq %u\n", __func__, __LINE__,
153 pd->node, pd->cpu, virq);
155 result = lv1_disconnect_irq_plug_ext(pd->node, pd->cpu, virq);
158 pr_info("%s:%d: lv1_disconnect_irq_plug_ext failed: %s\n",
159 __func__, __LINE__, ps3_result(result));
161 set_irq_chip_data(virq, NULL);
162 irq_dispose_mapping(virq);
165 EXPORT_SYMBOL_GPL(ps3_free_irq);
168 * ps3_alloc_io_irq - Assign a virq to a system bus device.
169 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
171 * @interrupt_id: The device interrupt id read from the system repository.
172 * @virq: The assigned Linux virq.
174 * An io irq represents a non-virtualized device interrupt. interrupt_id
175 * coresponds to the interrupt number of the interrupt controller.
178 int ps3_alloc_io_irq(enum ps3_cpu_binding cpu, unsigned int interrupt_id,
182 unsigned long outlet;
184 result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
187 pr_debug("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
188 __func__, __LINE__, ps3_result(result));
192 result = ps3_alloc_irq(cpu, outlet, virq);
198 int ps3_free_io_irq(unsigned int virq)
202 result = lv1_destruct_io_irq_outlet(virq_to_hw(virq));
205 pr_debug("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
206 __func__, __LINE__, ps3_result(result));
214 * ps3_alloc_event_irq - Allocate a virq for use with a system event.
215 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
217 * @virq: The assigned Linux virq.
219 * The virq can be used with lv1_connect_interrupt_event_receive_port() to
220 * arrange to receive events, or with ps3_send_event_locally() to signal
224 int ps3_alloc_event_irq(enum ps3_cpu_binding cpu, unsigned int *virq)
227 unsigned long outlet;
229 result = lv1_construct_event_receive_port(&outlet);
232 pr_debug("%s:%d: lv1_construct_event_receive_port failed: %s\n",
233 __func__, __LINE__, ps3_result(result));
238 result = ps3_alloc_irq(cpu, outlet, virq);
244 int ps3_free_event_irq(unsigned int virq)
248 pr_debug(" -> %s:%d\n", __func__, __LINE__);
250 result = lv1_destruct_event_receive_port(virq_to_hw(virq));
253 pr_debug("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
254 __func__, __LINE__, ps3_result(result));
258 pr_debug(" <- %s:%d\n", __func__, __LINE__);
262 int ps3_send_event_locally(unsigned int virq)
264 return lv1_send_event_locally(virq_to_hw(virq));
268 * ps3_connect_event_irq - Assign a virq to a system bus device.
269 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
271 * @did: The HV device identifier read from the system repository.
272 * @interrupt_id: The device interrupt id read from the system repository.
273 * @virq: The assigned Linux virq.
275 * An event irq represents a virtual device interrupt. The interrupt_id
276 * coresponds to the software interrupt number.
279 int ps3_connect_event_irq(enum ps3_cpu_binding cpu,
280 const struct ps3_device_id *did, unsigned int interrupt_id,
285 result = ps3_alloc_event_irq(cpu, virq);
290 result = lv1_connect_interrupt_event_receive_port(did->bus_id,
291 did->dev_id, virq_to_hw(*virq), interrupt_id);
294 pr_debug("%s:%d: lv1_connect_interrupt_event_receive_port"
295 " failed: %s\n", __func__, __LINE__,
297 ps3_free_event_irq(*virq);
302 pr_debug("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
303 interrupt_id, *virq);
308 int ps3_disconnect_event_irq(const struct ps3_device_id *did,
309 unsigned int interrupt_id, unsigned int virq)
313 pr_debug(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
316 result = lv1_disconnect_interrupt_event_receive_port(did->bus_id,
317 did->dev_id, virq_to_hw(virq), interrupt_id);
320 pr_debug("%s:%d: lv1_disconnect_interrupt_event_receive_port"
321 " failed: %s\n", __func__, __LINE__,
324 ps3_free_event_irq(virq);
326 pr_debug(" <- %s:%d\n", __func__, __LINE__);
331 * ps3_alloc_vuart_irq - Configure the system virtual uart virq.
332 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
334 * @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap.
335 * @virq: The assigned Linux virq.
337 * The system supports only a single virtual uart, so multiple calls without
338 * freeing the interrupt will return a wrong state error.
341 int ps3_alloc_vuart_irq(enum ps3_cpu_binding cpu, void* virt_addr_bmp,
345 unsigned long outlet;
348 BUG_ON(!is_kernel_addr((u64)virt_addr_bmp));
350 lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp));
352 result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet);
355 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
356 __func__, __LINE__, ps3_result(result));
360 result = ps3_alloc_irq(cpu, outlet, virq);
366 int ps3_free_vuart_irq(unsigned int virq)
370 result = lv1_deconfigure_virtual_uart_irq();
373 pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
374 __func__, __LINE__, ps3_result(result));
384 * ps3_alloc_spe_irq - Configure an spe virq.
385 * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be
387 * @spe_id: The spe_id returned from lv1_construct_logical_spe().
388 * @class: The spe interrupt class {0,1,2}.
389 * @virq: The assigned Linux virq.
393 int ps3_alloc_spe_irq(enum ps3_cpu_binding cpu, unsigned long spe_id,
394 unsigned int class, unsigned int *virq)
397 unsigned long outlet;
401 result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
404 pr_debug("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
405 __func__, __LINE__, ps3_result(result));
409 result = ps3_alloc_irq(cpu, outlet, virq);
415 int ps3_free_spe_irq(unsigned int virq)
422 #define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
423 #define PS3_PLUG_MAX 63
426 static void _dump_64_bmp(const char *header, const u64 *p, unsigned cpu,
427 const char* func, int line)
429 pr_debug("%s:%d: %s %u {%04lx_%04lx_%04lx_%04lx}\n",
430 func, line, header, cpu,
431 *p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff,
435 static void __attribute__ ((unused)) _dump_256_bmp(const char *header,
436 const u64 *p, unsigned cpu, const char* func, int line)
438 pr_debug("%s:%d: %s %u {%016lx:%016lx:%016lx:%016lx}\n",
439 func, line, header, cpu, p[0], p[1], p[2], p[3]);
442 #define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
443 static void _dump_bmp(struct ps3_private* pd, const char* func, int line)
447 spin_lock_irqsave(&pd->bmp.lock, flags);
448 _dump_64_bmp("stat", &pd->bmp.status, pd->cpu, func, line);
449 _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
450 spin_unlock_irqrestore(&pd->bmp.lock, flags);
453 #define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
454 static void __attribute__ ((unused)) _dump_mask(struct ps3_private* pd,
455 const char* func, int line)
459 spin_lock_irqsave(&pd->bmp.lock, flags);
460 _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
461 spin_unlock_irqrestore(&pd->bmp.lock, flags);
464 static void dump_bmp(struct ps3_private* pd) {};
465 #endif /* defined(DEBUG) */
467 static void ps3_chip_mask(unsigned int virq)
469 struct ps3_private *pd = get_irq_chip_data(virq);
470 u64 bit = 0x8000000000000000UL >> virq;
471 u64 *p = &pd->bmp.mask;
475 pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
477 local_irq_save(flags);
483 : "=&r" (old), "+m" (*p)
487 lv1_did_update_interrupt_mask(pd->node, pd->cpu);
488 local_irq_restore(flags);
491 static void ps3_chip_unmask(unsigned int virq)
493 struct ps3_private *pd = get_irq_chip_data(virq);
494 u64 bit = 0x8000000000000000UL >> virq;
495 u64 *p = &pd->bmp.mask;
499 pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
501 local_irq_save(flags);
507 : "=&r" (old), "+m" (*p)
511 lv1_did_update_interrupt_mask(pd->node, pd->cpu);
512 local_irq_restore(flags);
515 static void ps3_chip_eoi(unsigned int virq)
517 const struct ps3_private *pd = get_irq_chip_data(virq);
518 lv1_end_of_interrupt_ext(pd->node, pd->cpu, virq);
521 static struct irq_chip irq_chip = {
523 .mask = ps3_chip_mask,
524 .unmask = ps3_chip_unmask,
528 static void ps3_host_unmap(struct irq_host *h, unsigned int virq)
530 set_irq_chip_data(virq, NULL);
533 static int ps3_host_map(struct irq_host *h, unsigned int virq,
534 irq_hw_number_t hwirq)
536 pr_debug("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq,
539 set_irq_chip_and_handler(virq, &irq_chip, handle_fasteoi_irq);
544 static struct irq_host_ops ps3_host_ops = {
546 .unmap = ps3_host_unmap,
549 void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
551 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
553 pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq;
555 pr_debug("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__,
556 cpu, virq, pd->bmp.ipi_debug_brk_mask);
559 unsigned int ps3_get_irq(void)
561 struct ps3_private *pd = &__get_cpu_var(ps3_private);
562 u64 x = (pd->bmp.status & pd->bmp.mask);
565 /* check for ipi break first to stop this cpu ASAP */
567 if (x & pd->bmp.ipi_debug_brk_mask)
568 x &= pd->bmp.ipi_debug_brk_mask;
570 asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x));
573 if (unlikely(plug) == NO_IRQ) {
574 pr_debug("%s:%d: no plug found: cpu %u\n", __func__, __LINE__,
576 dump_bmp(&per_cpu(ps3_private, 0));
577 dump_bmp(&per_cpu(ps3_private, 1));
582 if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) {
583 dump_bmp(&per_cpu(ps3_private, 0));
584 dump_bmp(&per_cpu(ps3_private, 1));
591 void __init ps3_init_IRQ(void)
595 struct irq_host *host;
597 host = irq_alloc_host(IRQ_HOST_MAP_NOMAP, 0, &ps3_host_ops,
599 irq_set_default_host(host);
600 irq_set_virq_count(PS3_PLUG_MAX + 1);
602 for_each_possible_cpu(cpu) {
603 struct ps3_private *pd = &per_cpu(ps3_private, cpu);
605 lv1_get_logical_ppe_id(&pd->node);
606 pd->cpu = get_hard_smp_processor_id(cpu);
607 spin_lock_init(&pd->bmp.lock);
609 pr_debug("%s:%d: node %lu, cpu %d, bmp %lxh\n", __func__,
610 __LINE__, pd->node, pd->cpu,
611 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
613 result = lv1_configure_irq_state_bitmap(pd->node, pd->cpu,
614 ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
617 pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
618 " %s\n", __func__, __LINE__,
622 ppc_md.get_irq = ps3_get_irq;