xics-common.c (b6aa39228966e0d3f0bc3306be1892f87792903a) xics-common.c (880a3d6afd068682d6386a0528be1217541d3d8e)
1/*
2 * Copyright 2011 IBM Corporation.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *

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323
324static int xics_host_map(struct irq_domain *h, unsigned int virq,
325 irq_hw_number_t hw)
326{
327 struct ics *ics;
328
329 pr_devel("xics: map virq %d, hwirq 0x%lx\n", virq, hw);
330
1/*
2 * Copyright 2011 IBM Corporation.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *

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323
324static int xics_host_map(struct irq_domain *h, unsigned int virq,
325 irq_hw_number_t hw)
326{
327 struct ics *ics;
328
329 pr_devel("xics: map virq %d, hwirq 0x%lx\n", virq, hw);
330
331 /* They aren't all level sensitive but we just don't really know */
332 irq_set_status_flags(virq, IRQ_LEVEL);
331 /*
332 * Mark interrupts as edge sensitive by default so that resend
333 * actually works. The device-tree parsing will turn the LSIs
334 * back to level.
335 */
336 irq_clear_status_flags(virq, IRQ_LEVEL);
333
334 /* Don't call into ICS for IPIs */
335 if (hw == XICS_IPI) {
336 irq_set_chip_and_handler(virq, &xics_ipi_chip,
337 handle_percpu_irq);
338 return 0;
339 }
340

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346 return -EINVAL;
347}
348
349static int xics_host_xlate(struct irq_domain *h, struct device_node *ct,
350 const u32 *intspec, unsigned int intsize,
351 irq_hw_number_t *out_hwirq, unsigned int *out_flags)
352
353{
337
338 /* Don't call into ICS for IPIs */
339 if (hw == XICS_IPI) {
340 irq_set_chip_and_handler(virq, &xics_ipi_chip,
341 handle_percpu_irq);
342 return 0;
343 }
344

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350 return -EINVAL;
351}
352
353static int xics_host_xlate(struct irq_domain *h, struct device_node *ct,
354 const u32 *intspec, unsigned int intsize,
355 irq_hw_number_t *out_hwirq, unsigned int *out_flags)
356
357{
354 /* Current xics implementation translates everything
355 * to level. It is not technically right for MSIs but this
356 * is irrelevant at this point. We might get smarter in the future
357 */
358 *out_hwirq = intspec[0];
358 *out_hwirq = intspec[0];
359 *out_flags = IRQ_TYPE_LEVEL_LOW;
360
359
360 /*
361 * If intsize is at least 2, we look for the type in the second cell,
362 * we assume the LSB indicates a level interrupt.
363 */
364 if (intsize > 1) {
365 if (intspec[1] & 1)
366 *out_flags = IRQ_TYPE_LEVEL_LOW;
367 else
368 *out_flags = IRQ_TYPE_EDGE_RISING;
369 } else
370 *out_flags = IRQ_TYPE_LEVEL_LOW;
371
361 return 0;
362}
363
372 return 0;
373}
374
375int xics_set_irq_type(struct irq_data *d, unsigned int flow_type)
376{
377 /*
378 * We only support these. This has really no effect other than setting
379 * the corresponding descriptor bits mind you but those will in turn
380 * affect the resend function when re-enabling an edge interrupt.
381 *
382 * Set set the default to edge as explained in map().
383 */
384 if (flow_type == IRQ_TYPE_DEFAULT || flow_type == IRQ_TYPE_NONE)
385 flow_type = IRQ_TYPE_EDGE_RISING;
386
387 if (flow_type != IRQ_TYPE_EDGE_RISING &&
388 flow_type != IRQ_TYPE_LEVEL_LOW)
389 return -EINVAL;
390
391 irqd_set_trigger_type(d, flow_type);
392
393 return IRQ_SET_MASK_OK_NOCOPY;
394}
395
396int xics_retrigger(struct irq_data *data)
397{
398 /*
399 * We need to push a dummy CPPR when retriggering, since the subsequent
400 * EOI will try to pop it. Passing 0 works, as the function hard codes
401 * the priority value anyway.
402 */
403 xics_push_cppr(0);
404
405 /* Tell the core to do a soft retrigger */
406 return 0;
407}
408
364static const struct irq_domain_ops xics_host_ops = {
365 .match = xics_host_match,
366 .map = xics_host_map,
367 .xlate = xics_host_xlate,
368};
369
370static void __init xics_init_host(void)
371{

--- 64 unchanged lines hidden --- 		409static const struct irq_domain_ops xics_host_ops = {
410 .match = xics_host_match,
411 .map = xics_host_map,
412 .xlate = xics_host_xlate,
413};
414
415static void __init xics_init_host(void)
416{

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