From 890e668273745a298938c4abb39c5e5804c0cdd5 Mon Sep 17 00:00:00 2001 From: Sergey Ryazanov Date: Mon, 16 Oct 2017 02:31:19 +0300 Subject: [PATCH] ixp4xx: drop the jumbo frame support Current jumbo frame support code allocates rxbuffers of the maximum size supported by the hardware (~14KB). This happens at the device open time even if the configured MTU is lower (e.g. if it configured to standard 1500 bytes). Such behavior effectivly prevents interface start on boards with a low ammount of RAM (e.g. WRT300N v2), since the kernel simly can not allocates of ~0.8MB (14KB x 64). So remove jumbo frame support for now. Reported-by: Nerijus Baliunas Tested-by: Nerijus Baliunas Signed-off-by: Sergey Ryazanov --- .../304-ixp4xx_eth_jumboframe.patch | 80 ------------------- 1 file changed, 80 deletions(-) delete mode 100644 target/linux/ixp4xx/patches-4.4/304-ixp4xx_eth_jumboframe.patch diff --git a/target/linux/ixp4xx/patches-4.4/304-ixp4xx_eth_jumboframe.patch b/target/linux/ixp4xx/patches-4.4/304-ixp4xx_eth_jumboframe.patch deleted file mode 100644 index b16086bbc4..0000000000 --- a/target/linux/ixp4xx/patches-4.4/304-ixp4xx_eth_jumboframe.patch +++ /dev/null @@ -1,80 +0,0 @@ ---- a/drivers/net/ethernet/xscale/ixp4xx_eth.c -+++ b/drivers/net/ethernet/xscale/ixp4xx_eth.c -@@ -57,7 +57,7 @@ - - #define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS)) - #define REGS_SIZE 0x1000 --#define MAX_MRU 1536 /* 0x600 */ -+#define MAX_MRU (14320 - ETH_HLEN - ETH_FCS_LEN) - #define RX_BUFF_SIZE ALIGN((NET_IP_ALIGN) + MAX_MRU, 4) - - #define NAPI_WEIGHT 16 -@@ -1315,6 +1315,32 @@ static void destroy_queues(struct port * - } - } - -+static int eth_do_change_mtu(struct net_device *dev, int mtu) -+{ -+ struct port *port; -+ struct msg msg; -+ /* adjust for ethernet headers */ -+ int framesize = mtu + ETH_HLEN + ETH_FCS_LEN; -+ -+ port = netdev_priv(dev); -+ -+ memset(&msg, 0, sizeof(msg)); -+ msg.cmd = NPE_SETMAXFRAMELENGTHS; -+ msg.eth_id = port->id; -+ -+ /* max rx/tx 64 byte blocks */ -+ msg.byte2 = ((framesize + 63) / 64) << 8; -+ msg.byte3 = ((framesize + 63) / 64) << 8; -+ -+ msg.byte4 = msg.byte6 = framesize >> 8; -+ msg.byte5 = msg.byte7 = framesize & 0xff; -+ -+ if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAX_FRAME_LENGTH")) -+ return -EIO; -+ -+ return 0; -+} -+ - static int eth_open(struct net_device *dev) - { - struct port *port = netdev_priv(dev); -@@ -1366,6 +1392,8 @@ static int eth_open(struct net_device *d - if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE")) - return -EIO; - -+ eth_do_change_mtu(dev, dev->mtu); -+ - if ((err = request_queues(port)) != 0) - return err; - -@@ -1505,7 +1533,26 @@ static int eth_close(struct net_device * - return 0; - } - -+static int ixp_eth_change_mtu(struct net_device *dev, int mtu) -+{ -+ int ret; -+ -+ if (mtu > MAX_MRU) -+ return -EINVAL; -+ -+ if (dev->flags & IFF_UP) { -+ ret = eth_do_change_mtu(dev, mtu); -+ if (ret < 0) -+ return ret; -+ } -+ -+ dev->mtu = mtu; -+ -+ return 0; -+} -+ - static const struct net_device_ops ixp4xx_netdev_ops = { -+ .ndo_change_mtu = ixp_eth_change_mtu, - .ndo_open = eth_open, - .ndo_stop = eth_close, - .ndo_start_xmit = eth_xmit, -- 2.25.1