[POWERPC] cell: abstract spu management routines

This adds a platform specific spu management abstraction and the coresponding
routines to support the IBM Cell Blade.  It also removes the hypervisor only
resources that were included in struct spu.

Three new platform specific routines are introduced, spu_enumerate_spus(),
spu_create_spu() and spu_destroy_spu().  The underlying design uses a new
type, struct spu_management_ops, to hold function pointers that the platform
setup code is expected to initialize to instances appropriate to that platform.

For the IBM Cell Blade support, I put the hypervisor only resources that were
in struct spu into a platform specific data structure struct spu_pdata.

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>

1 files changed, 22 insertions, 312 deletions

diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index d4f4f396288f..841ed359802c 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -25,23 +25,17 @@
 #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/mm.h>
+#include <linux/io.h>
 #include <linux/mutex.h>
 #include <asm/spu.h>
 #include <asm/spu_priv1.h>
-#include <asm/mmu_context.h>
 #include <asm/xmon.h>
 
-#include "interrupt.h"
-
+const struct spu_management_ops *spu_management_ops;
 const struct spu_priv1_ops *spu_priv1_ops;
 
 EXPORT_SYMBOL_GPL(spu_priv1_ops);
@@ -512,261 +506,6 @@ int spu_irq_class_1_bottom(struct spu *spu)
 	return ret;
 }
 
-static int __init find_spu_node_id(struct device_node *spe)
-{
-	const unsigned int *id;
-	struct device_node *cpu;
-	cpu = spe->parent->parent;
-	id = get_property(cpu, "node-id", NULL);
-	return id ? *id : 0;
-}
-
-static int __init cell_spuprop_present(struct spu *spu, struct device_node *spe,
-		const char *prop)
-{
-	static DEFINE_MUTEX(add_spumem_mutex);
-
-	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->nid);
-	zone = pgdata->node_zones;
-
-	/* XXX rethink locking here */
-	mutex_lock(&add_spumem_mutex);
-	ret = __add_pages(zone, start_pfn, nr_pages);
-	mutex_unlock(&add_spumem_mutex);
-
-	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)
-{
-	iounmap(spu->priv2);
-	iounmap(spu->priv1);
-	iounmap(spu->problem);
-	iounmap((__force u8 __iomem *)spu->local_store);
-}
-
-/* This function shall be abstracted for HV platforms */
-static int __init spu_map_interrupts_old(struct spu *spu, struct device_node *np)
-{
-	unsigned int isrc;
-	const u32 *tmp;
-
-	/* Get the interrupt source unit from the device-tree */
-	tmp = get_property(np, "isrc", NULL);
-	if (!tmp)
-		return -ENODEV;
-	isrc = tmp[0];
-
-	/* Add the node number */
-	isrc |= spu->node << 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)
-{
-	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->priv1= map_spe_prop(spu, node, "priv1");
-	/* priv1 is not available on a hypervisor */
-
-	spu->priv2= map_spe_prop(spu, node, "priv2");
-	if (!spu->priv2)
-		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 device_node *node, int nr,
-		void __iomem** virt, unsigned long *phys)
-{
-	struct resource resource = { };
-	int ret;
-
-	ret = of_address_to_resource(node, nr, &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) {
-		pr_debug("spu_new: failed to map %s resource 0\n",
-			 node->full_name);
-		goto out;
-	}
-	ret = spu_map_resource(node, 1, (void __iomem**)&spu->problem,
-					&spu->problem_phys);
-	if (ret) {
-		pr_debug("spu_new: failed to map %s resource 1\n",
-			 node->full_name);
-		goto out_unmap;
-	}
-	ret = spu_map_resource(node, 2, (void __iomem**)&spu->priv2,
-					NULL);
-	if (ret) {
-		pr_debug("spu_new: failed to map %s resource 2\n",
-			 node->full_name);
-		goto out_unmap;
-	}
-
-	if (!firmware_has_feature(FW_FEATURE_LPAR))
-		ret = spu_map_resource(node, 3, (void __iomem**)&spu->priv1,
-					NULL);
-	if (ret) {
-		pr_debug("spu_new: failed to map %s resource 3\n",
-			 node->full_name);
-		goto out_unmap;
-	}
-	pr_debug("spu_new: %s maps:\n", node->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;
-}
-
 struct sysdev_class spu_sysdev_class = {
 	set_kset_name("spu")
 };
@@ -846,7 +585,7 @@ static void spu_destroy_sysdev(struct spu *spu)
 	sysdev_unregister(&spu->sysdev);
 }
 
-static int __init create_spu(struct device_node *spe)
+static int __init create_spu(void *data)
 {
 	struct spu *spu;
 	int ret;
@@ -857,60 +596,37 @@ static int __init create_spu(struct device_node *spe)
 	if (!spu)
 		goto out;
 
-	spu->node = find_spu_node_id(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");
-		return -ENODEV;
-	}
-	spu->nid = of_node_to_nid(spe);
-	if (spu->nid == -1)
-		spu->nid = 0;
+	spin_lock_init(&spu->register_lock);
+	mutex_lock(&spu_mutex);
+	spu->number = number++;
+	mutex_unlock(&spu_mutex);
+
+	ret = spu_create_spu(spu, data);
 
-	ret = spu_map_device(spu, spe);
-	/* try old method */
-	if (ret)
-		ret = spu_map_device_old(spu, spe);
 	if (ret)
 		goto out_free;
 
-	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);
 	spu_mfc_sdr_setup(spu);
 	spu_mfc_sr1_set(spu, 0x33);
-	mutex_lock(&spu_mutex);
-
-	spu->number = number++;
 	ret = spu_request_irqs(spu);
 	if (ret)
-		goto out_unlock;
+		goto out_destroy;
 
 	ret = spu_create_sysdev(spu);
 	if (ret)
 		goto out_free_irqs;
 
+	mutex_lock(&spu_mutex);
 	list_add(&spu->list, &spu_list[spu->node]);
 	list_add(&spu->full_list, &spu_full_list);
-	spu->devnode = of_node_get(spe);
-
 	mutex_unlock(&spu_mutex);
 
-	pr_debug(KERN_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_free_irqs:
 	spu_free_irqs(spu);
-out_unlock:
-	mutex_unlock(&spu_mutex);
-out_unmap:
-	spu_unmap(spu);
+out_destroy:
+	spu_destroy_spu(spu);
 out_free:
 	kfree(spu);
 out:
@@ -922,11 +638,9 @@ static void destroy_spu(struct spu *spu)
 	list_del_init(&spu->list);
 	list_del_init(&spu->full_list);
 
-	of_node_put(spu->devnode);
-
 	spu_destroy_sysdev(spu);
 	spu_free_irqs(spu);
-	spu_unmap(spu);
+	spu_destroy_spu(spu);
 	kfree(spu);
 }
 
@@ -947,7 +661,6 @@ module_exit(cleanup_spu_base);
 
 static int __init init_spu_base(void)
 {
-	struct device_node *node;
 	int i, ret;
 
 	/* create sysdev class for spus */
@@ -958,16 +671,13 @@ static int __init init_spu_base(void)
 	for (i = 0; i < MAX_NUMNODES; i++)
 		INIT_LIST_HEAD(&spu_list[i]);
 
-	ret = -ENODEV;
-	for (node = of_find_node_by_type(NULL, "spe");
-			node; node = of_find_node_by_type(node, "spe")) {
-		ret = create_spu(node);
-		if (ret) {
-			printk(KERN_WARNING "%s: Error initializing %s\n",
-				__FUNCTION__, node->name);
-			cleanup_spu_base();
-			break;
-		}
+	ret = spu_enumerate_spus(create_spu);
+
+	if (ret) {
+		printk(KERN_WARNING "%s: Error initializing spus\n",
+			__FUNCTION__);
+		cleanup_spu_base();
+		return ret;
 	}
 
 	xmon_register_spus(&spu_full_list);