/*
* spu management operations for of based platforms
*
* (C) Copyright IBM Deutschland Entwicklung GmbH 2005
* Copyright 2006 Sony Corp.
* (C) Copyright 2007 TOSHIBA 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/wait.h>
#include <linux/mm.h>
#include <linux/io.h>
#include <linux/mutex.h>
#include <linux/device.h>
#include <asm/spu.h>
#include <asm/spu_priv1.h>
#include <asm/firmware.h>
#include <asm/prom.h>
#include "interrupt.h"
struct device_node *spu_devnode(struct spu *spu)
{
return spu->devnode;
}
EXPORT_SYMBOL_GPL(spu_devnode);
static u64 __init find_spu_unit_number(struct device_node *spe)
{
const unsigned int *prop;
int proplen;
prop = get_property(spe, "unit-id", &proplen);
if (proplen == 4)
return (u64)*prop;
prop = get_property(spe, "reg", &proplen);
if (proplen == 4)
return (u64)*prop;
return 0;
}
static int __init cell_spuprop_present(struct spu *spu, struct device_node *spe,
const char *prop)
{
const struct address_prop {
unsigned long address;
unsigned int len;
} __attribute__((packed)) *p;
int proplen;
unsigned long start_pfn, nr_pages;
struct pglist_data *pgdata;
struct zone *zone;
int ret;
p = get_property(spe, prop, &proplen);
WARN_ON(proplen != sizeof (*p));
start_pfn = p->address >> PAGE_SHIFT;
nr_pages = ((unsigned long)p->len + PAGE_SIZE - 1) >> PAGE_SHIFT;
pgdata = NODE_DATA(spu->node);
zone = pgdata->node_zones;
ret = __add_pages(zone, start_pfn, nr_pages);
return ret;
}
static void __iomem * __init map_spe_prop(struct spu *spu,
struct device_node *n, const char *name)
{
const struct address_prop {
unsigned long address;
unsigned int len;
} __attribute__((packed)) *prop;
const void *p;
int proplen;
void __iomem *ret = NULL;
int err = 0;
p = get_property(n, name, &proplen);
if (proplen != sizeof (struct address_prop))
return NULL;
prop = p;
err = cell_spuprop_present(spu, n, name);
if (err && (err != -EEXIST))
goto out;
ret = ioremap(prop->address, prop->len);
out:
return ret;
}
static void spu_unmap(struct spu *spu)
{
if (!firmware_has_feature(FW_FEATURE_LPAR))
iounmap(spu->priv1);
iounmap(spu->priv2);
iounmap(spu->problem);
iounmap((__force u8 __iomem *)spu->local_store);
}
static int __init spu_map_interrupts_old(struct spu *spu,
struct device_node *np)
{
unsigned int isrc;
const u32 *tmp;
int nid;
/* Get the interrupt source unit from the device-tree */
tmp = get_property(np, "isrc", NULL);
if (!tmp)
return -ENODEV;
isrc = tmp[0];
tmp = get_property(np->parent->parent, "node-id", NULL);
if (!tmp) {
printk(KERN_WARNING "%s: can't find node-id\n", __FUNCTION__);
nid = spu->node;
} else
nid = tmp[0];
/* Add the node number */
isrc |= nid << IIC_IRQ_NODE_SHIFT;
/* Now map interrupts of all 3 classes */
spu->irqs[0] = irq_create_mapping(NULL, IIC_IRQ_CLASS_0 | isrc);
spu->irqs[1] = irq_create_mapping(NULL, IIC_IRQ_CLASS_1 | isrc);
spu->irqs[2] = irq_create_mapping(NULL, IIC_IRQ_CLASS_2 | isrc);
/* Right now, we only fail if class 2 failed */
return spu->irqs[2] == NO_IRQ ? -EINVAL : 0;
}
static int __init spu_map_device_old(struct spu *spu)
{
struct device_node *node = spu->devnode;
const char *prop;
int ret;
ret = -ENODEV;
spu->name = get_property(node, "name", NULL);
if (!spu->name)
goto out;
prop = get_property(node, "local-store", NULL);
if (!prop)
goto out;
spu->local_store_phys = *(unsigned long *)prop;
/* we use local store as ram, not io memory */
spu->local_store = (void __force *)
map_spe_prop(spu, node, "local-store");
if (!spu->local_store)
goto out;
prop = get_property(node, "problem", NULL);
if (!prop)
goto out_unmap;
spu->problem_phys = *(unsigned long *)prop;
spu->problem = map_spe_prop(spu, node, "problem");
if (!spu->problem)
goto out_unmap;
spu->priv2 = map_spe_prop(spu, node, "priv2");
if (!spu->priv2)
goto out_unmap;
if (!firmware_has_feature(FW_FEATURE_LPAR)) {
spu->priv1 = map_spe_prop(spu, node, "priv1");
if (!spu->priv1)
goto out_unmap;
}
ret = 0;
goto out;
out_unmap:
spu_unmap(spu);
out:
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) {
pr_debug("spu_new: failed to get irq %d\n", i);
goto err;
}
ret = -EINVAL;
pr_debug(" irq %d no 0x%x on %s\n", i, oirq.specifier[0],
oirq.controller->full_name);
spu->irqs[i] = irq_create_of_mapping(oirq.controller,
oirq.specifier, oirq.size);
if (spu->irqs[i] == NO_IRQ) {
pr_debug("spu_new: failed to map it !\n");
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 spu *spu, int nr,
void __iomem** virt, unsigned long *phys)
{
struct device_node *np = spu->devnode;
unsigned long start_pfn, nr_pages;
struct pglist_data *pgdata;
struct zone *zone;
struct resource resource = { };
unsigned long len;
int ret;
ret = of_address_to_resource(np, nr, &resource);
if (ret)
goto out;
if (phys)
*phys = resource.start;
len = resource.end - resource.start + 1;
*virt = ioremap(resource.start, len);
if (!*virt)
ret = -EINVAL;
start_pfn = resource.start >> PAGE_SHIFT;
nr_pages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT;
pgdata = NODE_DATA(spu->node);
zone = pgdata->node_zones;
ret = __add_pages(zone, start_pfn, nr_pages);
out:
return ret;
}
static int __init spu_map_device(struct spu *spu)
{
struct device_node *np = spu->devnode;
int ret = -ENODEV;
spu->name = get_property(np, "name", NULL);
if (!spu->name)
goto out;
ret = spu_map_resource(spu, 0, (void __iomem**)&spu->local_store,
&spu->local_store_phys);
if (ret) {
pr_debug("spu_new: failed to map %s resource 0\n",
np->full_name);
goto out;
}
ret = spu_map_resource(spu, 1, (void __iomem**)&spu->problem,
&spu->problem_phys);
if (ret) {
pr_debug("spu_new: failed to map %s resource 1\n",
np->full_name);
goto out_unmap;
}
ret = spu_map_resource(spu, 2, (void __iomem**)&spu->priv2, NULL);
if (ret) {
pr_debug("spu_new: failed to map %s resource 2\n",
np->full_name);
goto out_unmap;
}
if (!firmware_has_feature(FW_FEATURE_LPAR))
ret = spu_map_resource(spu, 3,
(void __iomem**)&spu->priv1, NULL);
if (ret) {
pr_debug("spu_new: failed to map %s resource 3\n",
np->full_name);
goto out_unmap;
}
pr_debug("spu_new: %s maps:\n", np->full_name);
pr_debug(" local store : 0x%016lx -> 0x%p\n",
spu->local_store_phys, spu->local_store);
pr_debug(" problem state : 0x%016lx -> 0x%p\n",
spu->problem_phys, spu->problem);
pr_debug(" priv2 : 0x%p\n", spu->priv2);
pr_debug(" priv1 : 0x%p\n", spu->priv1);
return 0;
out_unmap:
spu_unmap(spu);
out:
pr_debug("failed to map spe %s: %d\n", spu->name, ret);
return ret;
}
static int __init of_enumerate_spus(int (*fn)(void *data))
{
int ret;
struct device_node *node;
ret = -ENODEV;
for (node = of_find_node_by_type(NULL, "spe");
node; node = of_find_node_by_type(node, "spe")) {
ret = fn(node);
if (ret) {
printk(KERN_WARNING "%s: Error initializing %s\n",
__FUNCTION__, node->name);
break;
}
}
return ret;
}
static int __init of_create_spu(struct spu *spu, void *data)
{
int ret;
struct device_node *spe = (struct device_node *)data;
static int legacy_map = 0, legacy_irq = 0;
spu->devnode = of_node_get(spe);
spu->spe_id = find_spu_unit_number(spe);
spu->node = of_node_to_nid(spe);
if (spu->node >= MAX_NUMNODES) {
printk(KERN_WARNING "SPE %s on node %d ignored,"
" node number too big\n", spe->full_name, spu->node);
printk(KERN_WARNING "Check if CONFIG_NUMA is enabled.\n");
ret = -ENODEV;
goto out;
}
ret = spu_map_device(spu);
if (ret) {
if (!legacy_map) {
legacy_map = 1;
printk(KERN_WARNING "%s: Legacy device tree found, "
"trying to map old style\n", __FUNCTION__);
}
ret = spu_map_device_old(spu);
if (ret) {
printk(KERN_ERR "Unable to map %s\n",
spu->name);
goto out;
}
}
ret = spu_map_interrupts(spu, spe);
if (ret) {
if (!legacy_irq) {
legacy_irq = 1;
printk(KERN_WARNING "%s: Legacy device tree found, "
"trying old style irq\n", __FUNCTION__);
}
ret = spu_map_interrupts_old(spu, spe);
if (ret) {
printk(KERN_ERR "%s: could not map interrupts",
spu->name);
goto out_unmap;
}
}
pr_debug("Using SPE %s %p %p %p %p %d\n", spu->name,
spu->local_store, spu->problem, spu->priv1,
spu->priv2, spu->number);
goto out;
out_unmap:
spu_unmap(spu);
out:
return ret;
}
static int of_destroy_spu(struct spu *spu)
{
spu_unmap(spu);
of_node_put(spu->devnode);
return 0;
}
const struct spu_management_ops spu_management_of_ops = {
.enumerate_spus = of_enumerate_spus,
.create_spu = of_create_spu,
.destroy_spu = of_destroy_spu,
};
