db4550c4c8
ENOENT could not be found by the compiler when compiling again kernel 4.9. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
94 lines
2.2 KiB
Diff
94 lines
2.2 KiB
Diff
--- a/driver/nvram_stub.c
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+++ b/driver/nvram_stub.c
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@@ -5,6 +5,8 @@
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#include <siutils.h>
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#include <bcmendian.h>
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#include <bcmnvram.h>
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+#include <proto/ethernet.h>
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+#include <linux/errno.h>
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#ifdef BCMDBG_ERR
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#define NVR_MSG(x) printf x
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@@ -24,6 +26,7 @@ typedef struct _vars {
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static vars_t *vars = NULL;
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static int nvram_init_done = 0;
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extern char *nvram_buf[];
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+static void fixup_mac_addr(vars_t *new);
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int
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BCMATTACHFN(nvram_init)(void *si)
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@@ -55,6 +58,7 @@ BCMATTACHFN(nvram_init)(void *si)
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vars = new;
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bcopy((char *)(&nvh[1]), new->vars, nvs);
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+ fixup_mac_addr(new);
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return 0;
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}
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@@ -164,3 +168,65 @@ nvram_getall(char *buf, int count)
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*buf = '\0';
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return 0;
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}
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+
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+static bool nvram_is_valid_mac(struct ether_addr *mac)
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+{
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+ return mac && !(mac->octet[0] == 0x00 && mac->octet[1] == 0x90 && mac->octet[2] == 0x4c);
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+}
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+
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+static int nvram_increase_mac_addr(struct ether_addr *mac, u8 num)
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+{
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+ u8 *oui = mac->octet + ETHER_ADDR_LEN/2 - 1;
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+ u8 *p = mac->octet + ETHER_ADDR_LEN - 1;
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+
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+ do {
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+ (*p) += num;
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+ if (*p > num)
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+ break;
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+ p--;
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+ num = 1;
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+ } while (p != oui);
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+
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+ if (p == oui) {
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+ pr_err("unable to fetch mac address\n");
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+ return -ENOENT;
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+ }
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+ return 0;
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+}
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+
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+static void nvram_change_mac_addr(vars_t *new, struct ether_addr *valid, const char *name)
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+{
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+ char *macaddr_c;
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+ struct ether_addr macaddr;
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+
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+ macaddr_c = findvar(new->vars, new->vars + new->size, name);
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+ if (!macaddr_c)
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+ return;
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+
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+ bcm_ether_atoe(macaddr_c, &macaddr);
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+ if (nvram_is_valid_mac(&macaddr))
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+ return;
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+ nvram_increase_mac_addr(valid, 1);
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+ bcm_ether_ntoa(valid, macaddr_c);
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+}
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+
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+static void fixup_mac_addr(vars_t *new)
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+{
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+ char *macaddr_base_c;
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+ struct ether_addr macaddr_base;
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+
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+ macaddr_base_c = findvar(new->vars, new->vars + new->size, "et0macaddr");
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+ if (!macaddr_base_c)
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+ return;
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+
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+ bcm_ether_atoe(macaddr_base_c, &macaddr_base);
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+ if (!nvram_is_valid_mac(&macaddr_base))
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+ return;
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+
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+ /* jump over the first free address so it can be used for wan */
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+ nvram_increase_mac_addr(&macaddr_base, 1);
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+ nvram_change_mac_addr(new, &macaddr_base, "sb/1/macaddr");
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+ nvram_change_mac_addr(new, &macaddr_base, "pci/1/1/macaddr");
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+ nvram_change_mac_addr(new, &macaddr_base, "pci/1/2/macaddr");
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+ nvram_change_mac_addr(new, &macaddr_base, "pci/2/1/macaddr");
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+}
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