diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/vas.h | 9 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/vas.c | 11 |
2 files changed, 20 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/vas.h b/arch/powerpc/include/asm/vas.h index fd5963acd658..044748f547f5 100644 --- a/arch/powerpc/include/asm/vas.h +++ b/arch/powerpc/include/asm/vas.h @@ -104,6 +104,15 @@ struct vas_tx_win_attr { }; /* + * Helper to map a chip id to VAS id. + * For POWER9, this is a 1:1 mapping. In the future this maybe a 1:N + * mapping in which case, we will need to update this helper. + * + * Return the VAS id or -1 if no matching vasid is found. + */ +int chip_to_vas_id(int chipid); + +/* * Helper to initialize receive window attributes to defaults for an * NX window. */ diff --git a/arch/powerpc/platforms/powernv/vas.c b/arch/powerpc/platforms/powernv/vas.c index abb7090a22b4..cd9a733d05e2 100644 --- a/arch/powerpc/platforms/powernv/vas.c +++ b/arch/powerpc/platforms/powernv/vas.c @@ -123,6 +123,17 @@ struct vas_instance *find_vas_instance(int vasid) return NULL; } +int chip_to_vas_id(int chipid) +{ + int cpu; + + for_each_possible_cpu(cpu) { + if (cpu_to_chip_id(cpu) == chipid) + return per_cpu(cpu_vas_id, cpu); + } + return -1; +} + static int vas_probe(struct platform_device *pdev) { return init_vas_instance(pdev); |