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[CELL] cell: add hardcoded spu vicinity information for QS20

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This patch allows the use of spu affinity on QS20, whose
original FW does not provide affinity information.
This is done through two hardcoded arrays, and by reading the reg
property from each spu.

Signed-off-by: Andre Detsch <adetsch@br.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
This commit is contained in:
Arnd Bergmann 2007-07-20 21:39:46 +02:00 committed by Arnd Bergmann
parent 9d92af621f
commit 3ad216cae8
1 changed files with 54 additions and 1 deletions
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55
arch/powerpc/platforms/cell/spu_base.c
View file

@ -35,6 +35,8 @@
#include <asm/spu.h>
#include <asm/spu_priv1.h>
#include <asm/xmon.h>
#include <asm/prom.h>
#include "spu_priv1_mmio.h"
const struct spu_management_ops *spu_management_ops;
EXPORT_SYMBOL_GPL(spu_management_ops);
@ -657,6 +659,52 @@ static SYSDEV_ATTR(stat, 0644, spu_stat_show, NULL);
struct cbe_spu_info cbe_spu_info[MAX_NUMNODES];
EXPORT_SYMBOL_GPL(cbe_spu_info);
/* Hardcoded affinity idxs for QS20 */
#define SPES_PER_BE 8
static int QS20_reg_idxs[SPES_PER_BE] = { 0, 2, 4, 6, 7, 5, 3, 1 };
static int QS20_reg_memory[SPES_PER_BE] = { 1, 1, 0, 0, 0, 0, 0, 0 };
static struct spu *spu_lookup_reg(int node, u32 reg)
{
struct spu *spu;
list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) {
if (*(u32 *)get_property(spu_devnode(spu), "reg", NULL) == reg)
return spu;
}
return NULL;
}
static void init_aff_QS20_harcoded(void)
{
int node, i;
struct spu *last_spu, *spu;
u32 reg;
for (node = 0; node < MAX_NUMNODES; node++) {
last_spu = NULL;
for (i = 0; i < SPES_PER_BE; i++) {
reg = QS20_reg_idxs[i];
spu = spu_lookup_reg(node, reg);
if (!spu)
continue;
spu->has_mem_affinity = QS20_reg_memory[reg];
if (last_spu)
list_add_tail(&spu->aff_list,
&last_spu->aff_list);
last_spu = spu;
}
}
}
static int of_has_vicinity(void)
{
struct spu* spu;
spu = list_entry(cbe_spu_info[0].spus.next, struct spu, cbe_list);
return of_find_property(spu_devnode(spu), "vicinity", NULL) != NULL;
}
static int __init init_spu_base(void)
{
int i, ret = 0;
@ -698,12 +746,17 @@ static int __init init_spu_base(void)
crash_register_spus(&spu_full_list);
spu_add_sysdev_attr(&attr_stat);
if (!of_has_vicinity()) {
long root = of_get_flat_dt_root();
if (of_flat_dt_is_compatible(root, "IBM,CPBW-1.0"))
init_aff_QS20_harcoded();
}
return 0;
out_unregister_sysdev_class:
sysdev_class_unregister(&spu_sysdev_class);
out:
return ret;
}
module_init(init_spu_base);