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memory hotplug: Define memory_block_size_bytes for powerpc/pseries 

Define a version of memory_block_size_bytes() for powerpc/pseries such that
a memory block spans an entire lmb.

Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com>
Reviewed-by: Robin Holt <holt@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Nathan Fontenot 2011-01-20 10:45:20 -06:00 committed by Greg Kroah-Hartman
parent d33601644c
commit c540ada262
1 changed files with 53 additions and 13 deletions
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66
arch/powerpc/platforms/pseries/hotplug-memory.c
View File

@ -17,6 +17,54 @@
#include <asm/pSeries_reconfig.h>
#include <asm/sparsemem.h>
static unsigned long get_memblock_size(void)
{
struct device_node *np;
unsigned int memblock_size = 0;
np = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
if (np) {
const unsigned long *size;
size = of_get_property(np, "ibm,lmb-size", NULL);
memblock_size = size ? *size : 0;
of_node_put(np);
} else {
unsigned int memzero_size = 0;
const unsigned int *regs;
np = of_find_node_by_path("/memory@0");
if (np) {
regs = of_get_property(np, "reg", NULL);
memzero_size = regs ? regs[3] : 0;
of_node_put(np);
}
if (memzero_size) {
/* We now know the size of memory@0, use this to find
* the first memoryblock and get its size.
*/
char buf[64];
sprintf(buf, "/memory@%x", memzero_size);
np = of_find_node_by_path(buf);
if (np) {
regs = of_get_property(np, "reg", NULL);
memblock_size = regs ? regs[3] : 0;
of_node_put(np);
}
}
}
return memblock_size;
}
unsigned long memory_block_size_bytes(void)
{
return get_memblock_size();
}
static int pseries_remove_memblock(unsigned long base, unsigned int memblock_size)
{
unsigned long start, start_pfn;
@ -127,30 +175,22 @@ static int pseries_add_memory(struct device_node *np)
static int pseries_drconf_memory(unsigned long *base, unsigned int action)
{
struct device_node *np;
const unsigned long *lmb_size;
unsigned long memblock_size;
int rc;
np = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
if (!np)
memblock_size = get_memblock_size();
if (!memblock_size)
return -EINVAL;
lmb_size = of_get_property(np, "ibm,lmb-size", NULL);
if (!lmb_size) {
of_node_put(np);
return -EINVAL;
}
if (action == PSERIES_DRCONF_MEM_ADD) {
rc = memblock_add(*base, *lmb_size);
rc = memblock_add(*base, memblock_size);
rc = (rc < 0) ? -EINVAL : 0;
} else if (action == PSERIES_DRCONF_MEM_REMOVE) {
rc = pseries_remove_memblock(*base, *lmb_size);
rc = pseries_remove_memblock(*base, memblock_size);
} else {
rc = -EINVAL;
}
of_node_put(np);
return rc;
}