From: Jean Delvare <jdelvare@suse.de>
To: Linux I2C <linux-i2c@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Cc: Wolfram Sang <wsa@the-dreams.de>
Subject: [PATCH 2/4] firmware: dmi: Add dmi_memdev_handle
Date: Mon, 18 Nov 2019 10:26:06 +0100 [thread overview]
Message-ID: <20191118102606.6dbccfdf@endymion> (raw)
In-Reply-To: <20191118102410.78cd8e6e@endymion>
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 <jdelvare@suse.de>
---
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
next prev parent reply other threads:[~2019-11-18 9:26 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-18 9:24 [PATCH 0/4 v2] Instantiate SPD EEPROMs at boot on x86 Jean Delvare
2019-11-18 9:25 ` [PATCH 1/4] firmware: dmi: Remember the memory type Jean Delvare
2019-11-18 9:26 ` Jean Delvare [this message]
2019-11-18 9:27 ` [PATCH 3/4 v2] i2c: smbus: Add a way to instantiate SPD EEPROMs automatically Jean Delvare
2019-11-18 9:28 ` [PATCH 4/4 v2] i2c: i801: Instantiate " Jean Delvare
-- strict thread matches above, loose matches on Subject: below --
2019-10-14 9:36 [PATCH 0/4] Instantiate SPD EEPROMs at boot on x86 Jean Delvare
2019-10-14 9:38 ` [PATCH 2/4] firmware: dmi: Add dmi_memdev_handle Jean Delvare
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