From 127c3393b44830987e83ce8c8e7a77f79dd4f5c1 Mon Sep 17 00:00:00 2001 From: Vadim Bendebury Date: Wed, 22 Oct 2014 17:39:24 -0700 Subject: [PATCH] chromeos: add another VPD access API The new API allows to find VPD objects in the VPD cache. There is no need for the caller to allocate or free the per object memory. The existing API (cros_vpd_gets) now uses the new function as well. BRANCH=storm BUG=chrome-os-partner:32611 TEST=verified that MAC addresses still show up in the device tree on the booted storm device Change-Id: Id06be315981cdaa2285fc1ec61b96b62b1178a4b Signed-off-by: Patrick Georgi Original-Commit-Id: 99a34344448a5521cee8ad3918aefb1fde28417d Original-Change-Id: I6c0b11bb844d6235930124d642da632319142d88 Original-Signed-off-by: Vadim Bendebury Original-Reviewed-on: https://chromium-review.googlesource.com/225258 Original-Reviewed-by: Hung-Te Lin Reviewed-on: http://review.coreboot.org/9403 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer --- src/vendorcode/google/chromeos/cros_vpd.c | 26 ++++++++++++++++++----- src/vendorcode/google/chromeos/cros_vpd.h | 16 ++++++++++++++ 2 files changed, 37 insertions(+), 5 deletions(-) diff --git a/src/vendorcode/google/chromeos/cros_vpd.c b/src/vendorcode/google/chromeos/cros_vpd.c index df2b5bf667..c0e483019b 100644 --- a/src/vendorcode/google/chromeos/cros_vpd.c +++ b/src/vendorcode/google/chromeos/cros_vpd.c @@ -99,7 +99,7 @@ static int vpd_gets_callback(const uint8_t *key, int32_t key_len, return VPD_FAIL; } -char *cros_vpd_gets(const char *key, char *buffer, int size) +const void *cros_vpd_find(const char *key, int *size) { uint8_t *vpd_address = NULL; int32_t vpd_size = 0; @@ -121,10 +121,26 @@ char *cros_vpd_gets(const char *key, char *buffer, int size) if (!arg.matched) return NULL; - if (size < arg.value_len + 1) - size = arg.value_len + 1; - memcpy(buffer, arg.value, size - 1); - buffer[size - 1] = '\0'; + *size = arg.value_len; + return arg.value; +} + +char *cros_vpd_gets(const char *key, char *buffer, int size) +{ + const void *string_address; + int string_size; + + string_address = cros_vpd_find(key, &string_size); + + if (!string_address) + return NULL; + + if (size > (string_size + 1)) { + strcpy(buffer, string_address); + } else { + memcpy(buffer, string_address, size - 1); + buffer[size - 1] = '\0'; + } return buffer; } diff --git a/src/vendorcode/google/chromeos/cros_vpd.h b/src/vendorcode/google/chromeos/cros_vpd.h index 674dbf65d9..19658c2940 100644 --- a/src/vendorcode/google/chromeos/cros_vpd.h +++ b/src/vendorcode/google/chromeos/cros_vpd.h @@ -18,4 +18,20 @@ */ char *cros_vpd_gets(const char *key, char *buffer, int size); +/* + * Find VPD value by key. + * + * Searches for a VPD entry in the VPD cache. If found, places the size of the + * entry into '*size' and returns the pointer to the entry data. + * + * This function presumes that VPD is cached in DRAM (which is the case in the + * current implementation) and as such returns the pointer into the cache. The + * user is not supposed to modify the data, and does not have to free the + * memory. + * + * Returns NULL if key is not found. + */ + +const void *cros_vpd_find(const char *key, int *size); + #endif /* __CROS_VPD_H__ */