/*
* 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 "spufs/spufs.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;
/* new device trees should provide the physical-id attribute */
prop = of_get_property(spe, "physical-id", &proplen);
if (proplen == 4)
return (u64)*prop;
/* celleb device tree provides the unit-id */
prop = of_get_property(spe, "unit-id", &proplen);
if (proplen == 4)
return (u64)*prop;
/* legacy device trees provide the id in the reg attribute */
prop = of_get_property(spe, "reg", &proplen);
if (proplen == 4)
return (u64)*prop;
return 0;
}
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 = of_get_property(np, "isrc", NULL);
if (!tmp)
return -ENODEV;
isrc = tmp[0];
tmp = of_get_property(np->parent->parent, "node-id", NULL);
if (!tmp) {
printk(KERN_WARNING "%s: can't find node-id\n", __func__);
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 void __iomem * __init spu_map_prop_old(struct spu *spu,
struct device_node *n,
const char *name)
{
const struct address_prop {
unsigned long address;
unsigned int len;
} __attribute__((packed)) *prop;
int proplen;
prop = of_get_property(n, name, &proplen);
if (prop == NULL || proplen != sizeof (struct address_prop))
return NULL;
return ioremap(prop->address, prop->len);
}
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 = of_get_property(node, "name", NULL);
if (!spu->name)
goto out;
prop = of_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 *)
spu_map_prop_old(spu, node, "local-store");
if (!spu->local_store)
goto out;
prop = of_get_property(node, "problem", NULL);
if (!prop)
goto out_unmap;
spu->problem_phys = *(unsigned long *)prop;
spu->problem = spu_map_prop_old(spu, node, "problem");
if (!spu->problem)
goto out_unmap;
spu->priv2 = spu_map_prop_old(spu, node, "priv2");
if (!spu->priv2)
goto out_unmap;
if (!firmware_has_feature(FW_FEATURE_LPAR)) {
spu->priv1 = spu_map_prop_old(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;
struct resource resource = { };
unsigned long len;
int ret;
ret = of_address_to_resource(np, nr, &resource);
if (ret)
return ret;
if (phys)
*phys = resource.start;
len = resource.end - resource.start + 1;
*virt = ioremap(resource.start, len);
if (!*virt)
return -EINVAL;
return 0;
}
static int __init spu_map_device(struct spu *spu)
{
struct device_node *np = spu->devnode;
int ret = -ENODEV;
spu->name = of_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;
unsigned int n = 0;
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",
__func__, node->name);
break;
}
n++;
}
return ret ? ret : n;
}
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", __func__);
}
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", __func__);
}
ret = spu_map_interrupts_old(spu, spe);
if (ret) {
printk(KERN_ERR "%s: could not map interrupts\n",
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;
}
static void enable_spu_by_master_run(struct spu_context *ctx)
{
ctx->ops->master_start(ctx);
}
static void disable_spu_by_master_run(struct spu_context *ctx)
{
ctx->ops->master_stop(ctx);
}
/* Hardcoded affinity idxs for qs20 */
#define QS20_SPES_PER_BE 8
static int qs20_reg_idxs[QS20_SPES_PER_BE] = { 0, 2, 4, 6, 7, 5, 3, 1 };
static int qs20_reg_memory[QS20_SPES_PER_BE] = { 1, 1, 0, 0, 0, 0, 0, 0 };
static struct spu *spu_lookup_reg(int node, u32 reg)
{
struct spu *spu;
const u32 *spu_reg;
list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) {
spu_reg = of_get_property(spu_devnode(spu), "reg", NULL);
if (*spu_reg == reg)
return spu;
}
return NULL;
}
static void init_affinity_qs20_harcoded(void)
{
int node, i;
struct spu *last_spu, *spu;
u32 reg;
for (node = 0; node < MAX_NUMNODES; node++) {
last_spu = NULL;
for (i = 0; i < QS20_SPES_PER_BE; i++) {
reg = qs20_reg_idxs[i];
spu = spu_lookup_reg(node, reg);
if (!spu)
continue;
spu->has_mem_affinity = qs20_reg_memory[reg];
if (last_spu)
list_add_tail(&spu->aff_list,
&last_spu->aff_list);
last_spu = spu;
}
}
}
static int of_has_vicinity(void)
{
struct device_node *dn;
for_each_node_by_type(dn, "spe") {
if (of_find_property(dn, "vicinity", NULL)) {
of_node_put(dn);
return 1;
}
}
return 0;
}
static struct spu *devnode_spu(int cbe, struct device_node *dn)
{
struct spu *spu;
list_for_each_entry(spu, &cbe_spu_info[cbe].spus, cbe_list)
if (spu_devnode(spu) == dn)
return spu;
return NULL;
}
static struct spu *
neighbour_spu(int cbe, struct device_node *target, struct device_node *avoid)
{
struct spu *spu;
struct device_node *spu_dn;
const phandle *vic_handles;
int lenp, i;
list_for_each_entry(spu, &cbe_spu_info[cbe].spus, cbe_list) {
spu_dn = spu_devnode(spu);
if (spu_dn == avoid)
continue;
vic_handles = of_get_property(spu_dn, "vicinity", &lenp);
for (i=0; i < (lenp / sizeof(phandle)); i++) {
if (vic_handles[i] == target->phandle)
return spu;
}
}
return NULL;
}
static void init_affinity_node(int cbe)
{
struct spu *spu, *last_spu;
struct device_node *vic_dn, *last_spu_dn;
phandle avoid_ph;
const phandle *vic_handles;
const char *name;
int lenp, i, added;
last_spu = list_first_entry(&cbe_spu_info[cbe].spus, struct spu,
cbe_list);
avoid_ph = 0;
for (added = 1; added < cbe_spu_info[cbe].n_spus; added++) {
last_spu_dn = spu_devnode(last_spu);
vic_handles = of_get_property(last_spu_dn, "vicinity", &lenp);
/*
* Walk through each phandle in vicinity property of the spu
* (tipically two vicinity phandles per spe node)
*/
for (i = 0; i < (lenp / sizeof(phandle)); i++) {
if (vic_handles[i] == avoid_ph)
continue;
vic_dn = of_find_node_by_phandle(vic_handles[i]);
if (!vic_dn)
continue;
/* a neighbour might be spe, mic-tm, or bif0 */
name = of_get_property(vic_dn, "name", NULL);
if (!name)
continue;
if (strcmp(name, "spe") == 0) {
spu = devnode_spu(cbe, vic_dn);
avoid_ph = last_spu_dn->phandle;
} else {
/*
* "mic-tm" and "bif0" nodes do not have
* vicinity property. So we need to find the
* spe which has vic_dn as neighbour, but
* skipping the one we came from (last_spu_dn)
*/
spu = neighbour_spu(cbe, vic_dn, last_spu_dn);
if (!spu)
continue;
if (!strcmp(name, "mic-tm")) {
last_spu->has_mem_affinity = 1;
spu->has_mem_affinity = 1;
}
avoid_ph = vic_dn->phandle;
}
list_add_tail(&spu->aff_list, &last_spu->aff_list);
last_spu = spu;
break;
}
}
}
static void init_affinity_fw(void)
{
int cbe;
for (cbe = 0; cbe < MAX_NUMNODES; cbe++)
init_affinity_node(cbe);
}
static int __init init_affinity(void)
{
if (of_has_vicinity()) {
init_affinity_fw();
} else {
long root = of_get_flat_dt_root();
if (of_flat_dt_is_compatible(root, "IBM,CPBW-1.0"))
init_affinity_qs20_harcoded();
else
printk("No affinity configuration found\n");
}
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,
.enable_spu = enable_spu_by_master_run,
.disable_spu = disable_spu_by_master_run,
.init_affinity = init_affinity,
};
