From 375f3928a4d5aabe148fcccabc14e3d88ca77209 Mon Sep 17 00:00:00 2001 From: Vadim Bendebury Date: Sat, 28 Mar 2015 22:14:13 -0700 Subject: [PATCH] vpd: process WiFi MACs along with ethernet MACs coreboot is expected to read all MAC addresses from the VPD and put them in the coreboot table entry, depthcharge is expected to associate different MAC addresses with different kernel device tree nodes. This patch adds processing of wifi_macX keys. The order of MAC addresses in the coreboot table is such that the wifi_macX entries follow ethrnet_macX entries, ordered by X. BRANCH=none BUG=chrome-os-partner:36584 TEST=with the rest patches applied verified the contents of the kernel device tree on an urara board. Change-Id: I6523e168d2fea201a4956bc2a2d605b07ddac452 Signed-off-by: Patrick Georgi Original-Commit-Id: 36c12ee1d3ce9d2797902f0e098651067c2283ed Original-Change-Id: Ib87e4815243f34ab258325839cbc12d16120bf89 Original-Signed-off-by: Vadim Bendebury Original-Reviewed-on: https://chromium-review.googlesource.com/262843 Original-Reviewed-by: Aaron Durbin Reviewed-on: http://review.coreboot.org/9896 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer --- src/vendorcode/google/chromeos/vpd_mac.c | 118 +++++++++++++---------- 1 file changed, 69 insertions(+), 49 deletions(-) diff --git a/src/vendorcode/google/chromeos/vpd_mac.c b/src/vendorcode/google/chromeos/vpd_mac.c index ad4174c6bf..ff6ba8ebb2 100644 --- a/src/vendorcode/google/chromeos/vpd_mac.c +++ b/src/vendorcode/google/chromeos/vpd_mac.c @@ -23,68 +23,88 @@ #include +/* + * Decode string representation of the MAC address (a string of 12 hex + * symbols) into binary. 'key_name' is the name of the VPD field, it's used if + * it is necessary to report an input data format problem. + */ +static void decode_mac(struct mac_address *mac, + const char *mac_addr_str, + const char *key_name) +{ + int i; + + for (i = 0; i < sizeof(mac->mac_addr); i++) { + int j; + uint8_t n = 0; + + for (j = 0; j < 2; j++) { + char c = mac_addr_str[i * 2 + j]; + + if (isxdigit(c)) { + if (isdigit(c)) + c -= '0'; + else + c = tolower(c) - 'a' + 10; + } else { + printk(BIOS_ERR, "%s: non hexadecimal symbol " + "%#2.2x in the VPD field %s:%s\n", + __func__, (uint8_t)c, key_name, + mac_addr_str); + c = 0; + } + n <<= 4; + n |= c; + } + mac->mac_addr[i] = n; + } +} + void lb_table_add_macs_from_vpd(struct lb_header *header) { /* - * In case there is one or more MAC addresses stored in the VPD, the - * key is "ethernet_mac{0..9}", up to 10 values. + * Mac addresses in the VPD can be stored in two groups, for ethernet + * and WiFi, with keys 'ethernet_macX and wifi_macX. */ - static const char mac_addr_key_base[] = "ethernet_mac0"; - char mac_addr_key[sizeof(mac_addr_key_base)]; + const char *mac_addr_key_bases[] = {"ethernet_mac0", "wifi_mac0"}; + char mac_addr_key[20]; /* large enough for either key */ char mac_addr_str[13]; /* 12 symbols and the trailing zero. */ - int count; + int i, count; struct lb_macs *macs = NULL; - const int index_of_index = sizeof(mac_addr_key) - 2; - /* - * MAC addresses are stored in the VPD as strings of hex numbers, - * which need to be converted into binary for storing in the coreboot - * table. - */ - strcpy(mac_addr_key, mac_addr_key_base); + /* Make sure the copy is always zero terminated. */ + mac_addr_key[sizeof(mac_addr_key) - 1] = '\0'; + count = 0; - do { - int i; + for (i = 0; i < ARRAY_SIZE(mac_addr_key_bases); i++) { + int index_of_index; - if (!cros_vpd_gets(mac_addr_key, mac_addr_str, - sizeof(mac_addr_str))) - break; /* No more MAC addresses in VPD */ + strncpy(mac_addr_key, mac_addr_key_bases[i], + sizeof(mac_addr_key) - 1); + index_of_index = strlen(mac_addr_key) - 1; - if (!macs) { - macs = (struct lb_macs *)lb_new_record(header); - macs->tag = LB_TAG_MAC_ADDRS; - } + do { + /* + * If there are no more MAC addresses of this template + * in the VPD - move on. + */ + if (!cros_vpd_gets(mac_addr_key, mac_addr_str, + sizeof(mac_addr_str))) + break; - /* MAC address in symbolic form is in mac_addr_str. */ - for (i = 0; i < sizeof(macs->mac_addrs[0].mac_addr); i++) { - int j; - uint8_t n = 0; - - for (j = 0; j < 2; j++) { - char c = mac_addr_str[i * 2 + j]; - - if (isxdigit(c)) { - if (isdigit(c)) - c -= '0'; - else - c = tolower(c) - 'a' + 10; - } else { - printk(BIOS_ERR, - "%s: non hexadecimal symbol " - "%#2.2x in the VPD field %s\n", - __func__, (uint8_t)c, - mac_addr_key); - c = 0; - } - n <<= 4; - n |= c; + if (!macs) { + macs = (struct lb_macs *)lb_new_record(header); + macs->tag = LB_TAG_MAC_ADDRS; } - macs->mac_addrs[count].mac_addr[i] = n; - } - count++; - mac_addr_key[index_of_index] = '0' + count; - } while (count < 10); + decode_mac(macs->mac_addrs + count, + mac_addr_str, + mac_addr_key); + + count++; + mac_addr_key[index_of_index]++; + } while (count < 10); + } if (!count) return; /* No MAC addresses in the VPD. */