Commit 7650f2f2 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Paul Mackerras

[POWERPC] spufs: support new OF device tree format

The properties we used traditionally in the device tree are somewhat
nonstandard.  This adds support for a more conventional format using
'interrupts' and 'reg' properties.

The interrupts are specified in three cells (class 0, 1 and 2) and
registered at the interrupt-parent.

The reg property contains either three or four register areas in the
order 'local-store', 'problem', 'priv2', and 'priv1', so the priv1 one
can be left out in case of hypervisor driven systems that access these
through hcalls.
Signed-off-by: default avatarArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent e1dbff2b
......@@ -25,11 +25,13 @@
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/poll.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/wait.h>
#include <asm/firmware.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <linux/mutex.h>
......@@ -576,7 +578,7 @@ static void spu_unmap(struct spu *spu)
}
/* This function shall be abstracted for HV platforms */
static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
static int __init spu_map_interrupts_old(struct spu *spu, struct device_node *np)
{
unsigned int isrc;
const u32 *tmp;
......@@ -600,7 +602,7 @@ static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
return spu->irqs[2] == NO_IRQ ? -EINVAL : 0;
}
static int __init spu_map_device(struct spu *spu, struct device_node *node)
static int __init spu_map_device_old(struct spu *spu, struct device_node *node)
{
const char *prop;
int ret;
......@@ -645,6 +647,88 @@ static int __init spu_map_device(struct spu *spu, struct device_node *node)
return ret;
}
static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
{
struct of_irq oirq;
int ret;
int i;
for (i=0; i < 3; i++) {
ret = of_irq_map_one(np, i, &oirq);
if (ret)
goto err;
ret = -EINVAL;
spu->irqs[i] = irq_create_of_mapping(oirq.controller,
oirq.specifier, oirq.size);
if (spu->irqs[i] == NO_IRQ)
goto err;
}
return 0;
err:
pr_debug("failed to map irq %x for spu %s\n", *oirq.specifier, spu->name);
for (; i >= 0; i--) {
if (spu->irqs[i] != NO_IRQ)
irq_dispose_mapping(spu->irqs[i]);
}
return ret;
}
static int spu_map_resource(struct device_node *node, int nr,
void __iomem** virt, unsigned long *phys)
{
struct resource resource = { };
int ret;
ret = of_address_to_resource(node, 0, &resource);
if (ret)
goto out;
if (phys)
*phys = resource.start;
*virt = ioremap(resource.start, resource.end - resource.start);
if (!*virt)
ret = -EINVAL;
out:
return ret;
}
static int __init spu_map_device(struct spu *spu, struct device_node *node)
{
int ret = -ENODEV;
spu->name = get_property(node, "name", NULL);
if (!spu->name)
goto out;
ret = spu_map_resource(node, 0, (void __iomem**)&spu->local_store,
&spu->local_store_phys);
if (ret)
goto out;
ret = spu_map_resource(node, 1, (void __iomem**)&spu->problem,
&spu->problem_phys);
if (ret)
goto out_unmap;
ret = spu_map_resource(node, 2, (void __iomem**)&spu->priv2,
NULL);
if (ret)
goto out_unmap;
if (!firmware_has_feature(FW_FEATURE_LPAR))
ret = spu_map_resource(node, 3, (void __iomem**)&spu->priv1,
NULL);
if (ret)
goto out_unmap;
return 0;
out_unmap:
spu_unmap(spu);
out:
pr_debug("failed to map spe %s: %d\n", spu->name, ret);
return ret;
}
struct sysdev_class spu_sysdev_class = {
set_kset_name("spu")
};
......@@ -698,6 +782,9 @@ static int __init create_spu(struct device_node *spe)
goto out;
ret = spu_map_device(spu, spe);
/* try old method */
if (ret)
ret = spu_map_device_old(spu, spe);
if (ret)
goto out_free;
......@@ -706,6 +793,8 @@ static int __init create_spu(struct device_node *spe)
if (spu->nid == -1)
spu->nid = 0;
ret = spu_map_interrupts(spu, spe);
if (ret)
ret = spu_map_interrupts_old(spu, spe);
if (ret)
goto out_unmap;
spin_lock_init(&spu->register_lock);
......@@ -716,7 +805,7 @@ static int __init create_spu(struct device_node *spe)
spu->number = number++;
ret = spu_request_irqs(spu);
if (ret)
goto out_unmap;
goto out_unlock;
ret = spu_create_sysdev(spu);
if (ret)
......@@ -732,9 +821,9 @@ static int __init create_spu(struct device_node *spe)
out_free_irqs:
spu_free_irqs(spu);
out_unmap:
out_unlock:
mutex_unlock(&spu_mutex);
out_unmap:
spu_unmap(spu);
out_free:
kfree(spu);
......
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