From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 6DC1B20954CBD for ; Thu, 22 Feb 2018 11:52:17 -0800 (PST) From: Tony Luck Subject: [PATCH 4/5] firmware: dmi: Add function to look up a handle and return DIMM size Date: Thu, 22 Feb 2018 11:58:10 -0800 Message-Id: <20180222195811.27237-5-tony.luck@intel.com> In-Reply-To: <20180222195811.27237-1-tony.luck@intel.com> References: <20180222195811.27237-1-tony.luck@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" To: Borislav Petkov Cc: Jean Delvare , linux-nvdimm@lists.01.org, Aristeu Rozanski , "Rafael J. Wysocki" , Qiuxu Zhuo , linux-acpi@vger.kernel.org, Tony Luck , Borislav Petkov , Lv Zheng , Mauro Carvalho Chehab , Len Brown List-ID: When we first scan the SMBIOS table, save the size of the DIMM. Provide a function for other code (EDAC driver) to look up the size of a DIMM from its SMBIOS handle. Signed-off-by: Tony Luck --- drivers/firmware/dmi_scan.c | 31 +++++++++++++++++++++++++++++++ include/linux/dmi.h | 2 ++ 2 files changed, 33 insertions(+) diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index e763e1484331..9947f1f6ef7b 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -32,6 +32,7 @@ static char dmi_ids_string[128] __initdata; static struct dmi_memdev_info { const char *device; const char *bank; + u64 size; u16 handle; } *dmi_memdev; static int dmi_memdev_nr; @@ -386,6 +387,8 @@ static void __init save_mem_devices(const struct dmi_header *dm, void *v) { const char *d = (const char *)dm; static int nr; + u64 bytes; + u16 size; if (dm->type != DMI_ENTRY_MEM_DEVICE || dm->length < 0x12) return; @@ -396,6 +399,20 @@ static void __init save_mem_devices(const struct dmi_header *dm, void *v) dmi_memdev[nr].handle = get_unaligned(&dm->handle); dmi_memdev[nr].device = dmi_string(dm, d[0x10]); dmi_memdev[nr].bank = dmi_string(dm, d[0x11]); + + size = get_unaligned((u16 *)&d[0xC]); + if (size == 0) + bytes = 0; + else if (size == 0xffff) + bytes = ~0ul; + else if (size & 0x8000) + bytes = (u64)(size & 0x7fff) << 10; + else if (size != 0x7fff) + bytes = (u64)size << 20; + else + bytes = (u64)get_unaligned((u32 *)&d[0x1C]) << 20; + + dmi_memdev[nr].size = bytes; nr++; } @@ -1065,3 +1082,17 @@ void dmi_memdev_name(u16 handle, const char **bank, const char **device) } } EXPORT_SYMBOL_GPL(dmi_memdev_name); + +u64 dmi_memdev_size(u16 handle) +{ + int n; + + if (dmi_memdev) { + for (n = 0; n < dmi_memdev_nr; n++) { + if (handle == dmi_memdev[n].handle) + return dmi_memdev[n].size; + } + } + return ~0ul; +} +EXPORT_SYMBOL_GPL(dmi_memdev_size); diff --git a/include/linux/dmi.h b/include/linux/dmi.h index 46e151172d95..7f5929123b69 100644 --- a/include/linux/dmi.h +++ b/include/linux/dmi.h @@ -113,6 +113,7 @@ extern int dmi_walk(void (*decode)(const struct dmi_header *, void *), void *private_data); extern bool dmi_match(enum dmi_field f, const char *str); extern void dmi_memdev_name(u16 handle, const char **bank, const char **device); +extern u64 dmi_memdev_size(u16 handle); #else @@ -142,6 +143,7 @@ static inline bool dmi_match(enum dmi_field f, const char *str) { return false; } static inline void dmi_memdev_name(u16 handle, const char **bank, const char **device) { } +static inline u64 dmi_memdev_size(u16 handle) { return ~0ul; } static inline const struct dmi_system_id * dmi_first_match(const struct dmi_system_id *list) { return NULL; } -- 2.14.1 _______________________________________________ Linux-nvdimm mailing list Linux-nvdimm@lists.01.org https://lists.01.org/mailman/listinfo/linux-nvdimm