530 lines
12 KiB
C
530 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* spu management operations for of based platforms
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*
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* (C) Copyright IBM Deutschland Entwicklung GmbH 2005
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* Copyright 2006 Sony Corp.
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* (C) Copyright 2007 TOSHIBA CORPORATION
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*/
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#include <linux/interrupt.h>
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#include <linux/list.h>
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#include <linux/export.h>
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#include <linux/ptrace.h>
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#include <linux/wait.h>
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#include <linux/mm.h>
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#include <linux/io.h>
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#include <linux/mutex.h>
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#include <linux/device.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <asm/spu.h>
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#include <asm/spu_priv1.h>
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#include <asm/firmware.h>
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#include "spufs/spufs.h"
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#include "interrupt.h"
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struct device_node *spu_devnode(struct spu *spu)
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{
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return spu->devnode;
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}
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EXPORT_SYMBOL_GPL(spu_devnode);
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static u64 __init find_spu_unit_number(struct device_node *spe)
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{
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const unsigned int *prop;
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int proplen;
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/* new device trees should provide the physical-id attribute */
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prop = of_get_property(spe, "physical-id", &proplen);
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if (proplen == 4)
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return (u64)*prop;
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/* celleb device tree provides the unit-id */
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prop = of_get_property(spe, "unit-id", &proplen);
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if (proplen == 4)
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return (u64)*prop;
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/* legacy device trees provide the id in the reg attribute */
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prop = of_get_property(spe, "reg", &proplen);
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if (proplen == 4)
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return (u64)*prop;
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return 0;
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}
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static void spu_unmap(struct spu *spu)
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{
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if (!firmware_has_feature(FW_FEATURE_LPAR))
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iounmap(spu->priv1);
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iounmap(spu->priv2);
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iounmap(spu->problem);
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iounmap((__force u8 __iomem *)spu->local_store);
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}
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static int __init spu_map_interrupts_old(struct spu *spu,
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struct device_node *np)
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{
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unsigned int isrc;
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const u32 *tmp;
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int nid;
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/* Get the interrupt source unit from the device-tree */
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tmp = of_get_property(np, "isrc", NULL);
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if (!tmp)
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return -ENODEV;
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isrc = tmp[0];
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tmp = of_get_property(np->parent->parent, "node-id", NULL);
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if (!tmp) {
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printk(KERN_WARNING "%s: can't find node-id\n", __func__);
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nid = spu->node;
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} else
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nid = tmp[0];
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/* Add the node number */
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isrc |= nid << IIC_IRQ_NODE_SHIFT;
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/* Now map interrupts of all 3 classes */
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spu->irqs[0] = irq_create_mapping(NULL, IIC_IRQ_CLASS_0 | isrc);
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spu->irqs[1] = irq_create_mapping(NULL, IIC_IRQ_CLASS_1 | isrc);
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spu->irqs[2] = irq_create_mapping(NULL, IIC_IRQ_CLASS_2 | isrc);
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/* Right now, we only fail if class 2 failed */
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if (!spu->irqs[2])
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return -EINVAL;
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return 0;
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}
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static void __iomem * __init spu_map_prop_old(struct spu *spu,
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struct device_node *n,
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const char *name)
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{
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const struct address_prop {
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unsigned long address;
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unsigned int len;
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} __attribute__((packed)) *prop;
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int proplen;
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prop = of_get_property(n, name, &proplen);
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if (prop == NULL || proplen != sizeof (struct address_prop))
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return NULL;
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return ioremap(prop->address, prop->len);
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}
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static int __init spu_map_device_old(struct spu *spu)
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{
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struct device_node *node = spu->devnode;
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const char *prop;
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int ret;
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ret = -ENODEV;
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spu->name = of_get_property(node, "name", NULL);
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if (!spu->name)
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goto out;
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prop = of_get_property(node, "local-store", NULL);
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if (!prop)
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goto out;
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spu->local_store_phys = *(unsigned long *)prop;
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/* we use local store as ram, not io memory */
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spu->local_store = (void __force *)
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spu_map_prop_old(spu, node, "local-store");
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if (!spu->local_store)
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goto out;
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prop = of_get_property(node, "problem", NULL);
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if (!prop)
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goto out_unmap;
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spu->problem_phys = *(unsigned long *)prop;
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spu->problem = spu_map_prop_old(spu, node, "problem");
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if (!spu->problem)
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goto out_unmap;
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spu->priv2 = spu_map_prop_old(spu, node, "priv2");
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if (!spu->priv2)
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goto out_unmap;
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if (!firmware_has_feature(FW_FEATURE_LPAR)) {
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spu->priv1 = spu_map_prop_old(spu, node, "priv1");
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if (!spu->priv1)
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goto out_unmap;
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}
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ret = 0;
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goto out;
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out_unmap:
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spu_unmap(spu);
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out:
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return ret;
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}
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static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
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{
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int i;
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for (i=0; i < 3; i++) {
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spu->irqs[i] = irq_of_parse_and_map(np, i);
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if (!spu->irqs[i])
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goto err;
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}
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return 0;
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err:
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pr_debug("failed to map irq %x for spu %s\n", i, spu->name);
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for (; i >= 0; i--) {
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if (spu->irqs[i])
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irq_dispose_mapping(spu->irqs[i]);
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}
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return -EINVAL;
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}
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static int __init spu_map_resource(struct spu *spu, int nr,
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void __iomem** virt, unsigned long *phys)
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{
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struct device_node *np = spu->devnode;
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struct resource resource = { };
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unsigned long len;
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int ret;
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ret = of_address_to_resource(np, nr, &resource);
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if (ret)
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return ret;
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if (phys)
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*phys = resource.start;
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len = resource_size(&resource);
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*virt = ioremap(resource.start, len);
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if (!*virt)
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return -EINVAL;
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return 0;
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}
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static int __init spu_map_device(struct spu *spu)
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{
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struct device_node *np = spu->devnode;
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int ret = -ENODEV;
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spu->name = of_get_property(np, "name", NULL);
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if (!spu->name)
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goto out;
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ret = spu_map_resource(spu, 0, (void __iomem**)&spu->local_store,
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&spu->local_store_phys);
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if (ret) {
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pr_debug("spu_new: failed to map %pOF resource 0\n",
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np);
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goto out;
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}
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ret = spu_map_resource(spu, 1, (void __iomem**)&spu->problem,
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&spu->problem_phys);
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if (ret) {
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pr_debug("spu_new: failed to map %pOF resource 1\n",
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np);
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goto out_unmap;
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}
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ret = spu_map_resource(spu, 2, (void __iomem**)&spu->priv2, NULL);
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if (ret) {
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pr_debug("spu_new: failed to map %pOF resource 2\n",
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np);
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goto out_unmap;
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}
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if (!firmware_has_feature(FW_FEATURE_LPAR))
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ret = spu_map_resource(spu, 3,
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(void __iomem**)&spu->priv1, NULL);
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if (ret) {
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pr_debug("spu_new: failed to map %pOF resource 3\n",
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np);
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goto out_unmap;
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}
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pr_debug("spu_new: %pOF maps:\n", np);
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pr_debug(" local store : 0x%016lx -> 0x%p\n",
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spu->local_store_phys, spu->local_store);
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pr_debug(" problem state : 0x%016lx -> 0x%p\n",
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spu->problem_phys, spu->problem);
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pr_debug(" priv2 : 0x%p\n", spu->priv2);
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pr_debug(" priv1 : 0x%p\n", spu->priv1);
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return 0;
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out_unmap:
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spu_unmap(spu);
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out:
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pr_debug("failed to map spe %s: %d\n", spu->name, ret);
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return ret;
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}
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static int __init of_enumerate_spus(int (*fn)(void *data))
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{
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int ret;
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struct device_node *node;
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unsigned int n = 0;
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ret = -ENODEV;
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for_each_node_by_type(node, "spe") {
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ret = fn(node);
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if (ret) {
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printk(KERN_WARNING "%s: Error initializing %pOFn\n",
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__func__, node);
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of_node_put(node);
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break;
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}
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n++;
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}
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return ret ? ret : n;
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}
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static int __init of_create_spu(struct spu *spu, void *data)
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{
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int ret;
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struct device_node *spe = (struct device_node *)data;
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static int legacy_map = 0, legacy_irq = 0;
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spu->devnode = of_node_get(spe);
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spu->spe_id = find_spu_unit_number(spe);
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spu->node = of_node_to_nid(spe);
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if (spu->node >= MAX_NUMNODES) {
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printk(KERN_WARNING "SPE %pOF on node %d ignored,"
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" node number too big\n", spe, spu->node);
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printk(KERN_WARNING "Check if CONFIG_NUMA is enabled.\n");
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ret = -ENODEV;
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goto out;
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}
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ret = spu_map_device(spu);
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if (ret) {
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if (!legacy_map) {
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legacy_map = 1;
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printk(KERN_WARNING "%s: Legacy device tree found, "
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"trying to map old style\n", __func__);
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}
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ret = spu_map_device_old(spu);
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if (ret) {
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printk(KERN_ERR "Unable to map %s\n",
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spu->name);
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goto out;
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}
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}
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ret = spu_map_interrupts(spu, spe);
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if (ret) {
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if (!legacy_irq) {
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legacy_irq = 1;
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printk(KERN_WARNING "%s: Legacy device tree found, "
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"trying old style irq\n", __func__);
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}
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ret = spu_map_interrupts_old(spu, spe);
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if (ret) {
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printk(KERN_ERR "%s: could not map interrupts\n",
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spu->name);
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goto out_unmap;
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}
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}
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pr_debug("Using SPE %s %p %p %p %p %d\n", spu->name,
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spu->local_store, spu->problem, spu->priv1,
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spu->priv2, spu->number);
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goto out;
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out_unmap:
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spu_unmap(spu);
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out:
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return ret;
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}
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static int of_destroy_spu(struct spu *spu)
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{
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spu_unmap(spu);
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of_node_put(spu->devnode);
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return 0;
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}
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static void enable_spu_by_master_run(struct spu_context *ctx)
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{
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ctx->ops->master_start(ctx);
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}
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static void disable_spu_by_master_run(struct spu_context *ctx)
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{
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ctx->ops->master_stop(ctx);
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}
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/* Hardcoded affinity idxs for qs20 */
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#define QS20_SPES_PER_BE 8
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static int qs20_reg_idxs[QS20_SPES_PER_BE] = { 0, 2, 4, 6, 7, 5, 3, 1 };
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static int qs20_reg_memory[QS20_SPES_PER_BE] = { 1, 1, 0, 0, 0, 0, 0, 0 };
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static struct spu *__init spu_lookup_reg(int node, u32 reg)
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{
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struct spu *spu;
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const u32 *spu_reg;
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list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) {
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spu_reg = of_get_property(spu_devnode(spu), "reg", NULL);
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if (*spu_reg == reg)
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return spu;
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}
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return NULL;
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}
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static void __init init_affinity_qs20_harcoded(void)
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{
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int node, i;
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struct spu *last_spu, *spu;
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u32 reg;
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for (node = 0; node < MAX_NUMNODES; node++) {
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last_spu = NULL;
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for (i = 0; i < QS20_SPES_PER_BE; i++) {
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reg = qs20_reg_idxs[i];
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spu = spu_lookup_reg(node, reg);
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if (!spu)
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continue;
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spu->has_mem_affinity = qs20_reg_memory[reg];
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if (last_spu)
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list_add_tail(&spu->aff_list,
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&last_spu->aff_list);
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last_spu = spu;
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}
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}
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}
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static int __init of_has_vicinity(void)
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{
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struct device_node *dn;
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for_each_node_by_type(dn, "spe") {
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if (of_property_present(dn, "vicinity")) {
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of_node_put(dn);
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return 1;
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}
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}
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return 0;
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}
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static struct spu *__init devnode_spu(int cbe, struct device_node *dn)
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{
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struct spu *spu;
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list_for_each_entry(spu, &cbe_spu_info[cbe].spus, cbe_list)
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if (spu_devnode(spu) == dn)
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return spu;
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return NULL;
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}
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static struct spu * __init
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neighbour_spu(int cbe, struct device_node *target, struct device_node *avoid)
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{
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struct spu *spu;
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struct device_node *spu_dn;
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const phandle *vic_handles;
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int lenp, i;
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list_for_each_entry(spu, &cbe_spu_info[cbe].spus, cbe_list) {
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spu_dn = spu_devnode(spu);
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if (spu_dn == avoid)
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continue;
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vic_handles = of_get_property(spu_dn, "vicinity", &lenp);
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for (i=0; i < (lenp / sizeof(phandle)); i++) {
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if (vic_handles[i] == target->phandle)
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return spu;
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}
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}
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return NULL;
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}
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static void __init init_affinity_node(int cbe)
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{
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struct spu *spu, *last_spu;
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struct device_node *vic_dn, *last_spu_dn;
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phandle avoid_ph;
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const phandle *vic_handles;
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int lenp, i, added;
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last_spu = list_first_entry(&cbe_spu_info[cbe].spus, struct spu,
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cbe_list);
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avoid_ph = 0;
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for (added = 1; added < cbe_spu_info[cbe].n_spus; added++) {
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last_spu_dn = spu_devnode(last_spu);
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vic_handles = of_get_property(last_spu_dn, "vicinity", &lenp);
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/*
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* Walk through each phandle in vicinity property of the spu
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* (typically two vicinity phandles per spe node)
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*/
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for (i = 0; i < (lenp / sizeof(phandle)); i++) {
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if (vic_handles[i] == avoid_ph)
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continue;
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vic_dn = of_find_node_by_phandle(vic_handles[i]);
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if (!vic_dn)
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continue;
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if (of_node_name_eq(vic_dn, "spe") ) {
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spu = devnode_spu(cbe, vic_dn);
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avoid_ph = last_spu_dn->phandle;
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} else {
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/*
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* "mic-tm" and "bif0" nodes do not have
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* vicinity property. So we need to find the
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* spe which has vic_dn as neighbour, but
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* skipping the one we came from (last_spu_dn)
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*/
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spu = neighbour_spu(cbe, vic_dn, last_spu_dn);
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if (!spu)
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continue;
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if (of_node_name_eq(vic_dn, "mic-tm")) {
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last_spu->has_mem_affinity = 1;
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spu->has_mem_affinity = 1;
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}
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avoid_ph = vic_dn->phandle;
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}
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of_node_put(vic_dn);
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list_add_tail(&spu->aff_list, &last_spu->aff_list);
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last_spu = spu;
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break;
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}
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}
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}
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static void __init init_affinity_fw(void)
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{
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int cbe;
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for (cbe = 0; cbe < MAX_NUMNODES; cbe++)
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init_affinity_node(cbe);
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}
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static int __init init_affinity(void)
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{
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if (of_has_vicinity()) {
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init_affinity_fw();
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} else {
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if (of_machine_is_compatible("IBM,CPBW-1.0"))
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init_affinity_qs20_harcoded();
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else
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printk("No affinity configuration found\n");
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}
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|
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,
|
|
};
|