diff options
Diffstat (limited to 'target/linux/bcm4908/patches-5.4/073-v5.12-0009-net-broadcom-bcm4908_enet-set-MTU-on-open-on-request.patch')
| -rw-r--r-- | target/linux/bcm4908/patches-5.4/073-v5.12-0009-net-broadcom-bcm4908_enet-set-MTU-on-open-on-request.patch | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/target/linux/bcm4908/patches-5.4/073-v5.12-0009-net-broadcom-bcm4908_enet-set-MTU-on-open-on-request.patch b/target/linux/bcm4908/patches-5.4/073-v5.12-0009-net-broadcom-bcm4908_enet-set-MTU-on-open-on-request.patch deleted file mode 100644 index 0201bfeda3..0000000000 --- a/target/linux/bcm4908/patches-5.4/073-v5.12-0009-net-broadcom-bcm4908_enet-set-MTU-on-open-on-request.patch +++ /dev/null @@ -1,119 +0,0 @@ -From 14b3b46a67f78ade99eafcbf320105615e948569 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> -Date: Fri, 12 Feb 2021 16:21:35 +0100 -Subject: [PATCH] net: broadcom: bcm4908_enet: set MTU on open & on request -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Hardware comes up with default max frame size set to 1518. When using it -with switch it results in actual Ethernet MTU 1492: -1518 - 14 (Ethernet header) - 4 (Broadcom's tag) - 4 (802.1q) - 4 (FCS) - -Above means hardware in its default state can't handle standard Ethernet -traffic (MTU 1500). - -Define maximum possible Ethernet overhead and always set MAC max frame -length accordingly. This change fixes handling Ethernet frames of length -1506 - 1514. - -Signed-off-by: Rafał Miłecki <rafal@milecki.pl> -Signed-off-by: David S. Miller <davem@davemloft.net> ---- - drivers/net/ethernet/broadcom/bcm4908_enet.c | 31 ++++++++++++++++---- - 1 file changed, 25 insertions(+), 6 deletions(-) - ---- a/drivers/net/ethernet/broadcom/bcm4908_enet.c -+++ b/drivers/net/ethernet/broadcom/bcm4908_enet.c -@@ -5,6 +5,7 @@ - - #include <linux/delay.h> - #include <linux/etherdevice.h> -+#include <linux/if_vlan.h> - #include <linux/interrupt.h> - #include <linux/module.h> - #include <linux/of.h> -@@ -29,9 +30,10 @@ - ENET_DMA_CH_CFG_INT_BUFF_DONE) - #define ENET_DMA_MAX_BURST_LEN 8 /* in 64 bit words */ - --#define ENET_MTU_MIN 60 --#define ENET_MTU_MAX 1500 /* Is it possible to support 2044? */ --#define ENET_MTU_MAX_EXTRA_SIZE 32 /* L2 */ -+#define ENET_MTU_MAX ETH_DATA_LEN /* Is it possible to support 2044? */ -+#define BRCM_MAX_TAG_LEN 6 -+#define ENET_MAX_ETH_OVERHEAD (ETH_HLEN + BRCM_MAX_TAG_LEN + VLAN_HLEN + \ -+ ETH_FCS_LEN + 4) /* 32 */ - - struct bcm4908_enet_dma_ring_bd { - __le32 ctl; -@@ -135,6 +137,11 @@ static void bcm4908_enet_intrs_ack(struc - enet_write(enet, ENET_DMA_CH_RX_CFG + ENET_DMA_CH_CFG_INT_STAT, ENET_DMA_INT_DEFAULTS); - } - -+static void bcm4908_enet_set_mtu(struct bcm4908_enet *enet, int mtu) -+{ -+ enet_umac_write(enet, UMAC_MAX_FRAME_LEN, mtu + ENET_MAX_ETH_OVERHEAD); -+} -+ - /*** - * DMA - */ -@@ -246,7 +253,7 @@ static int bcm4908_enet_dma_alloc_rx_buf - u32 tmp; - int err; - -- slot->len = ENET_MTU_MAX + ENET_MTU_MAX_EXTRA_SIZE; -+ slot->len = ENET_MTU_MAX + ENET_MAX_ETH_OVERHEAD; - - slot->skb = netdev_alloc_skb(enet->netdev, slot->len); - if (!slot->skb) -@@ -374,6 +381,8 @@ static void bcm4908_enet_gmac_init(struc - { - u32 cmd; - -+ bcm4908_enet_set_mtu(enet, enet->netdev->mtu); -+ - cmd = enet_umac_read(enet, UMAC_CMD); - enet_umac_write(enet, UMAC_CMD, cmd | CMD_SW_RESET); - enet_umac_write(enet, UMAC_CMD, cmd & ~CMD_SW_RESET); -@@ -559,7 +568,7 @@ static int bcm4908_enet_poll(struct napi - - len = (ctl & DMA_CTL_LEN_DESC_BUFLENGTH) >> DMA_CTL_LEN_DESC_BUFLENGTH_SHIFT; - -- if (len < ENET_MTU_MIN || -+ if (len < ETH_ZLEN || - (ctl & (DMA_CTL_STATUS_SOP | DMA_CTL_STATUS_EOP)) != (DMA_CTL_STATUS_SOP | DMA_CTL_STATUS_EOP)) { - enet->netdev->stats.rx_dropped++; - break; -@@ -583,11 +592,21 @@ static int bcm4908_enet_poll(struct napi - return handled; - } - -+static int bcm4908_enet_change_mtu(struct net_device *netdev, int new_mtu) -+{ -+ struct bcm4908_enet *enet = netdev_priv(netdev); -+ -+ bcm4908_enet_set_mtu(enet, new_mtu); -+ -+ return 0; -+} -+ - static const struct net_device_ops bcm4908_enet_netdev_ops = { - .ndo_open = bcm4908_enet_open, - .ndo_stop = bcm4908_enet_stop, - .ndo_start_xmit = bcm4908_enet_start_xmit, - .ndo_set_mac_address = eth_mac_addr, -+ .ndo_change_mtu = bcm4908_enet_change_mtu, - }; - - static int bcm4908_enet_probe(struct platform_device *pdev) -@@ -625,7 +644,7 @@ static int bcm4908_enet_probe(struct pla - eth_hw_addr_random(netdev); - netdev->netdev_ops = &bcm4908_enet_netdev_ops; - netdev->min_mtu = ETH_ZLEN; -- netdev->mtu = ENET_MTU_MAX; -+ netdev->mtu = ETH_DATA_LEN; - netdev->max_mtu = ENET_MTU_MAX; - netif_napi_add(netdev, &enet->napi, bcm4908_enet_poll, 64); - |