From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jean Delvare Subject: [PATCH 2/4] firmware: dmi: Add dmi_memdev_handle Date: Mon, 14 Oct 2019 11:38:57 +0200 Message-ID: <20191014113857.1166bef6@endymion> References: <20191014113636.57b5ce89@endymion> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20191014113636.57b5ce89@endymion> Sender: linux-kernel-owner@vger.kernel.org To: Linux I2C , LKML Cc: Wolfram Sang List-Id: linux-i2c@vger.kernel.org Add a utility function dmi_memdev_handle() which returns the DMI handle associated with a given memory slot. This will allow kernel drivers to iterate over the memory slots. Signed-off-by: Jean Delvare --- drivers/firmware/dmi_scan.c | 16 ++++++++++++++++ include/linux/dmi.h | 2 ++ 2 files changed, 18 insertions(+) --- linux-5.3.orig/drivers/firmware/dmi_scan.c 2019-10-10 11:33:02.871034637 +0200 +++ linux-5.3/drivers/firmware/dmi_scan.c 2019-10-10 11:45:37.275549638 +0200 @@ -1151,3 +1151,19 @@ u8 dmi_memdev_type(u16 handle) return 0x0; /* Not a valid value */ } EXPORT_SYMBOL_GPL(dmi_memdev_type); + +/** + * dmi_memdev_handle - get the DMI handle of a memory slot + * @slot: slot number + * + * Return the DMI handle associated with a given memory slot, or %0xFFFF + * if there is no such slot. + */ +u16 dmi_memdev_handle(int slot) +{ + if (dmi_memdev && slot >= 0 && slot < dmi_memdev_nr) + return dmi_memdev[slot].handle; + + return 0xffff; /* Not a valid value */ +} +EXPORT_SYMBOL_GPL(dmi_memdev_handle); --- linux-5.3.orig/include/linux/dmi.h 2019-10-10 11:33:02.871034637 +0200 +++ linux-5.3/include/linux/dmi.h 2019-10-10 11:34:46.146337207 +0200 @@ -114,6 +114,7 @@ extern bool dmi_match(enum dmi_field f, extern void dmi_memdev_name(u16 handle, const char **bank, const char **device); extern u64 dmi_memdev_size(u16 handle); extern u8 dmi_memdev_type(u16 handle); +extern u16 dmi_memdev_handle(int slot); #else @@ -144,6 +145,7 @@ static inline void dmi_memdev_name(u16 h const char **device) { } static inline u64 dmi_memdev_size(u16 handle) { return ~0ul; } static inline u8 dmi_memdev_type(u16 handle) { return 0x0; } +static inline u16 dmi_memdev_handle(int slot) { return 0xffff; } static inline const struct dmi_system_id * dmi_first_match(const struct dmi_system_id *list) { return NULL; } -- Jean Delvare SUSE L3 Support