1 files changed, 420 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spu_manage.c b/arch/powerpc/platforms/cell/spu_manage.c
new file mode 100644
index 000000000000..d8b39fe39cdd
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spu_manage.c
@@ -0,0 +1,420 @@
+/*
+ * 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,
+};