lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Mon, 3 Jun 2013 18:41:47 +0200 From: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com> To: "David S. Miller" <davem@...emloft.net> Cc: netdev@...r.kernel.org, Jason Cooper <jason@...edaemon.net>, Gregory Clement <gregory.clement@...e-electrons.com>, Andrew Lunn <andrew@...n.ch>, Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>, Lior Amsalem <alior@...vell.com>, linux-arm-kernel@...ts.infradead.org Subject: [PATCH] net: mvneta: read MAC address from hardware when available This patch improves the logic used by the mvneta driver to find a MAC address for a particular interface. Until now, it was only looking at the Device Tree, and if no address was found, was falling back to generating a random MAC address. This patch adds the intermediate solution of reading the MAC address from the hardware registers, in case it has been set by the bootloader. So the order is now: 1) MAC address from the Device Tree 2) MAC address from the hardware registers 3) Random MAC address This requires moving the MAC address initialization a little bit later in the ->probe() code, because it now requires the hardware registers to be remapped. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com> --- drivers/net/ethernet/marvell/mvneta.c | 35 +++++++++++++++++++++++++++-------- 1 file changed, 27 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index c966785..8c05cc5 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -2251,6 +2251,20 @@ static int mvneta_change_mtu(struct net_device *dev, int mtu) return 0; } +/* Get mac address */ +static void mvneta_get_mac_addr(struct mvneta_port *pp, unsigned char *addr) +{ + u32 mac_addr_l, mac_addr_h; + mac_addr_l = mvreg_read(pp, MVNETA_MAC_ADDR_LOW); + mac_addr_h = mvreg_read(pp, MVNETA_MAC_ADDR_HIGH); + addr[0] = (mac_addr_h >> 24) & 0xFF; + addr[1] = (mac_addr_h >> 16) & 0xFF; + addr[2] = (mac_addr_h >> 8) & 0xFF; + addr[3] = mac_addr_h & 0xFF; + addr[4] = (mac_addr_l >> 8) & 0xFF; + addr[5] = mac_addr_l & 0xFF; +} + /* Handle setting mac address */ static int mvneta_set_mac_addr(struct net_device *dev, void *addr) { @@ -2667,7 +2681,8 @@ static int mvneta_probe(struct platform_device *pdev) u32 phy_addr; struct mvneta_port *pp; struct net_device *dev; - const char *mac_addr; + const char *dt_mac_addr; + char hw_mac_addr[ETH_ALEN]; int phy_mode; int err; @@ -2703,13 +2718,6 @@ static int mvneta_probe(struct platform_device *pdev) goto err_free_irq; } - mac_addr = of_get_mac_address(dn); - - if (!mac_addr || !is_valid_ether_addr(mac_addr)) - eth_hw_addr_random(dev); - else - memcpy(dev->dev_addr, mac_addr, ETH_ALEN); - dev->tx_queue_len = MVNETA_MAX_TXD; dev->watchdog_timeo = 5 * HZ; dev->netdev_ops = &mvneta_netdev_ops; @@ -2740,6 +2748,17 @@ static int mvneta_probe(struct platform_device *pdev) clk_prepare_enable(pp->clk); + dt_mac_addr = of_get_mac_address(dn); + if (dt_mac_addr && is_valid_ether_addr(dt_mac_addr)) + memcpy(dev->dev_addr, dt_mac_addr, ETH_ALEN); + else { + mvneta_get_mac_addr(pp, hw_mac_addr); + if (is_valid_ether_addr(hw_mac_addr)) + memcpy(dev->dev_addr, hw_mac_addr, ETH_ALEN); + else + eth_hw_addr_random(dev); + } + pp->tx_done_timer.data = (unsigned long)dev; pp->tx_ring_size = MVNETA_MAX_TXD; -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists