![Grant Likely](/assets/img/avatar_default.png)
struct of_irq and struct of_phandle_args are exactly the same structure. This patch makes the kernel use of_phandle_args everywhere. This in itself isn't a big deal, but it makes some follow-on patches simpler. Signed-off-by: Grant Likely <grant.likely@linaro.org> Acked-by: Michal Simek <monstr@monstr.eu> Acked-by: Tony Lindgren <tony@atomide.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
/*
|
|
* Copyright 2006-2007, Michael Ellerman, IBM Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; version 2 of the
|
|
* License.
|
|
*
|
|
*/
|
|
|
|
#include <linux/irq.h>
|
|
#include <linux/bitmap.h>
|
|
#include <linux/msi.h>
|
|
#include <asm/mpic.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/hw_irq.h>
|
|
#include <asm/ppc-pci.h>
|
|
#include <asm/msi_bitmap.h>
|
|
|
|
#include <sysdev/mpic.h>
|
|
|
|
void mpic_msi_reserve_hwirq(struct mpic *mpic, irq_hw_number_t hwirq)
|
|
{
|
|
/* The mpic calls this even when there is no allocator setup */
|
|
if (!mpic->msi_bitmap.bitmap)
|
|
return;
|
|
|
|
msi_bitmap_reserve_hwirq(&mpic->msi_bitmap, hwirq);
|
|
}
|
|
|
|
#ifdef CONFIG_MPIC_U3_HT_IRQS
|
|
static int mpic_msi_reserve_u3_hwirqs(struct mpic *mpic)
|
|
{
|
|
irq_hw_number_t hwirq;
|
|
const struct irq_domain_ops *ops = mpic->irqhost->ops;
|
|
struct device_node *np;
|
|
int flags, index, i;
|
|
struct of_phandle_args oirq;
|
|
|
|
pr_debug("mpic: found U3, guessing msi allocator setup\n");
|
|
|
|
/* Reserve source numbers we know are reserved in the HW.
|
|
*
|
|
* This is a bit of a mix of U3 and U4 reserves but that's going
|
|
* to work fine, we have plenty enugh numbers left so let's just
|
|
* mark anything we don't like reserved.
|
|
*/
|
|
for (i = 0; i < 8; i++)
|
|
msi_bitmap_reserve_hwirq(&mpic->msi_bitmap, i);
|
|
|
|
for (i = 42; i < 46; i++)
|
|
msi_bitmap_reserve_hwirq(&mpic->msi_bitmap, i);
|
|
|
|
for (i = 100; i < 105; i++)
|
|
msi_bitmap_reserve_hwirq(&mpic->msi_bitmap, i);
|
|
|
|
for (i = 124; i < mpic->num_sources; i++)
|
|
msi_bitmap_reserve_hwirq(&mpic->msi_bitmap, i);
|
|
|
|
|
|
np = NULL;
|
|
while ((np = of_find_all_nodes(np))) {
|
|
pr_debug("mpic: mapping hwirqs for %s\n", np->full_name);
|
|
|
|
index = 0;
|
|
while (of_irq_parse_one(np, index++, &oirq) == 0) {
|
|
ops->xlate(mpic->irqhost, NULL, oirq.args,
|
|
oirq.args_count, &hwirq, &flags);
|
|
msi_bitmap_reserve_hwirq(&mpic->msi_bitmap, hwirq);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
static int mpic_msi_reserve_u3_hwirqs(struct mpic *mpic)
|
|
{
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
int mpic_msi_init_allocator(struct mpic *mpic)
|
|
{
|
|
int rc;
|
|
|
|
rc = msi_bitmap_alloc(&mpic->msi_bitmap, mpic->num_sources,
|
|
mpic->irqhost->of_node);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = msi_bitmap_reserve_dt_hwirqs(&mpic->msi_bitmap);
|
|
if (rc > 0) {
|
|
if (mpic->flags & MPIC_U3_HT_IRQS)
|
|
rc = mpic_msi_reserve_u3_hwirqs(mpic);
|
|
|
|
if (rc) {
|
|
msi_bitmap_free(&mpic->msi_bitmap);
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|