Commit bed120c6 authored by Joel H Schopp's avatar Joel H Schopp Committed by Linus Torvalds

[PATCH] spufs: fix for CONFIG_NUMA

Based on an older patch from  Mike Kravetz <kravetz@us.ibm.com>

We need to have a mem_map for high addresses in order to make fops->no_page
work on spufs mem and register files.  So far, we have used the
memory_present() function during early bootup, but that did not work when
CONFIG_NUMA was enabled.

We now use the __add_pages() function to add the mem_map when loading the
spufs module, which is a lot nicer.
Signed-off-by: default avatarArnd Bergmann <arnd.bergmann@de.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 46a66eec
......@@ -12,7 +12,8 @@ config SPU_FS
config SPUFS_MMAP
bool
depends on SPU_FS && SPARSEMEM && !PPC_64K_PAGES
depends on SPU_FS && SPARSEMEM
select MEMORY_HOTPLUG
default y
endmenu
......@@ -29,6 +29,8 @@
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/console.h>
#include <linux/mutex.h>
#include <linux/memory_hotplug.h>
#include <asm/mmu.h>
#include <asm/processor.h>
......@@ -46,6 +48,7 @@
#include <asm/cputable.h>
#include <asm/ppc-pci.h>
#include <asm/irq.h>
#include <asm/spu.h>
#include "interrupt.h"
#include "iommu.h"
......@@ -69,77 +72,6 @@ static void cell_show_cpuinfo(struct seq_file *m)
of_node_put(root);
}
#ifdef CONFIG_SPARSEMEM
static int __init find_spu_node_id(struct device_node *spe)
{
unsigned int *id;
#ifdef CONFIG_NUMA
struct device_node *cpu;
cpu = spe->parent->parent;
id = (unsigned int *)get_property(cpu, "node-id", NULL);
#else
id = NULL;
#endif
return id ? *id : 0;
}
static void __init cell_spuprop_present(struct device_node *spe,
const char *prop, int early)
{
struct address_prop {
unsigned long address;
unsigned int len;
} __attribute__((packed)) *p;
int proplen;
unsigned long start_pfn, end_pfn, pfn;
int node_id;
p = (void*)get_property(spe, prop, &proplen);
WARN_ON(proplen != sizeof (*p));
node_id = find_spu_node_id(spe);
start_pfn = p->address >> PAGE_SHIFT;
end_pfn = (p->address + p->len + PAGE_SIZE - 1) >> PAGE_SHIFT;
/* We need to call memory_present *before* the call to sparse_init,
but we can initialize the page structs only *after* that call.
Thus, we're being called twice. */
if (early)
memory_present(node_id, start_pfn, end_pfn);
else {
/* As the pages backing SPU LS and I/O are outside the range
of regular memory, their page structs were not initialized
by free_area_init. Do it here instead. */
for (pfn = start_pfn; pfn < end_pfn; pfn++) {
struct page *page = pfn_to_page(pfn);
set_page_links(page, ZONE_DMA, node_id, pfn);
init_page_count(page);
reset_page_mapcount(page);
SetPageReserved(page);
INIT_LIST_HEAD(&page->lru);
}
}
}
static void __init cell_spumem_init(int early)
{
struct device_node *node;
for (node = of_find_node_by_type(NULL, "spe");
node; node = of_find_node_by_type(node, "spe")) {
cell_spuprop_present(node, "local-store", early);
cell_spuprop_present(node, "problem", early);
cell_spuprop_present(node, "priv1", early);
cell_spuprop_present(node, "priv2", early);
}
}
#else
static void __init cell_spumem_init(int early)
{
}
#endif
static void cell_progress(char *s, unsigned short hex)
{
printk("*** %04x : %s\n", hex, s ? s : "");
......@@ -172,8 +104,6 @@ static void __init cell_setup_arch(void)
#endif
mmio_nvram_init();
cell_spumem_init(0);
}
/*
......@@ -189,8 +119,6 @@ static void __init cell_init_early(void)
ppc64_interrupt_controller = IC_CELL_PIC;
cell_spumem_init(1);
DBG(" <- cell_init_early()\n");
}
......
......@@ -520,6 +520,56 @@ void spu_irq_setaffinity(struct spu *spu, int cpu)
}
EXPORT_SYMBOL_GPL(spu_irq_setaffinity);
static int __init find_spu_node_id(struct device_node *spe)
{
unsigned int *id;
struct device_node *cpu;
cpu = spe->parent->parent;
id = (unsigned int *)get_property(cpu, "node-id", NULL);
return id ? *id : 0;
}
static int __init cell_spuprop_present(struct device_node *spe,
const char *prop)
{
static DEFINE_MUTEX(add_spumem_mutex);
struct address_prop {
unsigned long address;
unsigned int len;
} __attribute__((packed)) *p;
int proplen;
unsigned long start_pfn, nr_pages;
int node_id;
struct pglist_data *pgdata;
struct zone *zone;
int ret;
p = (void*)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;
/*
* XXX need to get the correct NUMA node in here. This may
* be different from the spe::node_id property, e.g. when
* the host firmware is not NUMA aware.
*/
node_id = 0;
pgdata = NODE_DATA(node_id);
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 device_node *n,
const char *name)
{
......@@ -530,6 +580,8 @@ static void __iomem * __init map_spe_prop(struct device_node *n,
void *p;
int proplen;
void* ret = NULL;
int err = 0;
p = get_property(n, name, &proplen);
if (proplen != sizeof (struct address_prop))
......@@ -537,7 +589,14 @@ static void __iomem * __init map_spe_prop(struct device_node *n,
prop = p;
return ioremap(prop->address, prop->len);
err = cell_spuprop_present(n, name);
if (err && (err != -EEXIST))
goto out;
ret = ioremap(prop->address, prop->len);
out:
return ret;
}
static void spu_unmap(struct spu *spu)
......@@ -597,17 +656,6 @@ static int __init spu_map_device(struct spu *spu, struct device_node *spe)
return ret;
}
static int __init find_spu_node_id(struct device_node *spe)
{
unsigned int *id;
struct device_node *cpu;
cpu = spe->parent->parent;
id = (unsigned int *)get_property(cpu, "node-id", NULL);
return id ? *id : 0;
}
static int __init create_spu(struct device_node *spe)
{
struct spu *spu;
......
......@@ -69,12 +69,16 @@ int __add_pages(struct zone *zone, unsigned long phys_start_pfn,
for (i = 0; i < nr_pages; i += PAGES_PER_SECTION) {
err = __add_section(zone, phys_start_pfn + i);
if (err)
/* We want to keep adding the rest of the
* sections if the first ones already exist
*/
if (err && (err != -EEXIST))
break;
}
return err;
}
EXPORT_SYMBOL_GPL(__add_pages);
static void grow_zone_span(struct zone *zone,
unsigned long start_pfn, unsigned long end_pfn)
......
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