mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 19:53:59 +08:00
25235f712b
This affects the U3 MSI code as well as the PASEMI MSI code. We keep some of the MPIC routines as helpers, and also the U3 best-guess reservation logic. The rest is replaced by the generic code. And a few printk format changes due to hwirq type change. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
95 lines
2.1 KiB
C
95 lines
2.1 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;
|
|
struct irq_host_ops *ops = mpic->irqhost->ops;
|
|
struct device_node *np;
|
|
int flags, index, i;
|
|
struct of_irq oirq;
|
|
|
|
pr_debug("mpic: found U3, guessing msi allocator setup\n");
|
|
|
|
/* Reserve source numbers we know are reserved in the HW */
|
|
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);
|
|
|
|
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_map_one(np, index++, &oirq) == 0) {
|
|
ops->xlate(mpic->irqhost, NULL, oirq.specifier,
|
|
oirq.size, &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->irq_count,
|
|
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;
|
|
}
|