Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756229Ab0GLPsn (ORCPT ); Mon, 12 Jul 2010 11:48:43 -0400 Received: from e8.ny.us.ibm.com ([32.97.182.138]:37158 "EHLO e8.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755927Ab0GLPsl (ORCPT ); Mon, 12 Jul 2010 11:48:41 -0400 Message-ID: <4C3B3956.3020205@austin.ibm.com> Date: Mon, 12 Jul 2010 10:48:38 -0500 From: Nathan Fontenot User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.10) Gecko/20100527 Thunderbird/3.0.5 MIME-Version: 1.0 To: linux-kernel@vger.kernel.org CC: linuxppc-dev@ozlabs.org Subject: [PATCH 7/7] Enable multiple memory sections per sysfs memory directory for powerpc/pseries References: <4C3B3446.5090302@austin.ibm.com> In-Reply-To: <4C3B3446.5090302@austin.ibm.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2933 Lines: 108 This patch updates the powerpc/pseries code to initialize the memory sysfs directory creation to create sysfs directories that each cover an LMB's worth of memory. Signed-off-by; Nathan Fontenot --- arch/powerpc/platforms/pseries/hotplug-memory.c | 66 +++++++++++++++++++----- 1 file changed, 53 insertions(+), 13 deletions(-) Index: linux-2.6/arch/powerpc/platforms/pseries/hotplug-memory.c =================================================================== --- linux-2.6.orig/arch/powerpc/platforms/pseries/hotplug-memory.c 2010-07-09 14:36:52.000000000 -0500 +++ linux-2.6/arch/powerpc/platforms/pseries/hotplug-memory.c 2010-07-09 14:38:25.000000000 -0500 @@ -17,6 +17,54 @@ #include #include +static u32 get_lmb_size(void) +{ + struct device_node *np; + unsigned int lmb_size = 0; + + np = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory"); + if (np) { + const unsigned int *size; + + size = of_get_property(np, "ibm,lmb-size", NULL); + lmb_size = size ? *size : 0; + + of_node_put(np); + } else { + const unsigned int *regs; + + np = of_find_node_by_path("/memory@0"); + if (np) { + regs = of_get_property(np, "reg", NULL); + lmb_size = regs ? regs[3] : 0; + of_node_put(np); + } + + if (lmb_size) { + /* We now know the size of memory@0, use this to find + * the first lmb and get its size. + */ + char buf[64]; + + sprintf(buf, "/memory@%x", lmb_size); + np = of_find_node_by_path(buf); + if (np) { + regs = of_get_property(np, "reg", NULL); + lmb_size = regs ? regs[3] : 0; + of_node_put(np); + } else + lmb_size = 0; + } + } + + return lmb_size; +} + +u32 memory_block_size(void) +{ + return get_lmb_size(); +} + static int pseries_remove_lmb(unsigned long base, unsigned int lmb_size) { unsigned long start, start_pfn; @@ -127,30 +175,22 @@ static int pseries_drconf_memory(unsigned long *base, unsigned int action) { - struct device_node *np; - const unsigned long *lmb_size; + unsigned long lmb_size; int rc; - np = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory"); - if (!np) + lmb_size = get_lmb_size(); + if (!lmb_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 = lmb_add(*base, *lmb_size); + rc = lmb_add(*base, lmb_size); rc = (rc < 0) ? -EINVAL : 0; } else if (action == PSERIES_DRCONF_MEM_REMOVE) { - rc = pseries_remove_lmb(*base, *lmb_size); + rc = pseries_remove_lmb(*base, lmb_size); } else { rc = -EINVAL; } - of_node_put(np); return rc; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/