From: Rafał Miłecki Date: Wed, 21 Sep 2022 07:24:47 +0000 (+0200) Subject: bcm4908: fix -EPROBE_DEFER support in bcm4908_enet X-Git-Tag: v22.03.1~36 X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=2a6346725abd1eac15f22ea661ffabd79be230f2;p=openwrt%2Fstaging%2Fhauke.git bcm4908: fix -EPROBE_DEFER support in bcm4908_enet Signed-off-by: Rafał Miłecki (cherry picked from commit 1722e23ffcf9038114142a2129c29eb3cdec8ff9) --- diff --git a/target/linux/bcm4908/patches-5.10/077-v5.14-net-broadcom-bcm4908_enet-reset-DMA-rings-sw-indexes.patch b/target/linux/bcm4908/patches-5.10/077-v5.14-net-broadcom-bcm4908_enet-reset-DMA-rings-sw-indexes.patch new file mode 100644 index 0000000000..02290c8e64 --- /dev/null +++ b/target/linux/bcm4908/patches-5.10/077-v5.14-net-broadcom-bcm4908_enet-reset-DMA-rings-sw-indexes.patch @@ -0,0 +1,45 @@ +From ddeacc4f6494e07cbb6f033627926623f3e7a9d0 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Tue, 22 Jun 2021 07:24:15 +0200 +Subject: [PATCH] net: broadcom: bcm4908_enet: reset DMA rings sw indexes + properly +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Resetting software indexes in bcm4908_dma_alloc_buf_descs() is not +enough as it's called during device probe only. Driver resets DMA on +every .ndo_open callback and it's required to reset indexes then. + +This fixes inconsistent rings state and stalled traffic after interface +down & up sequence. + +Fixes: 4feffeadbcb2 ("net: broadcom: bcm4908enet: add BCM4908 controller driver") +Signed-off-by: Rafał Miłecki +Signed-off-by: David S. Miller +--- + drivers/net/ethernet/broadcom/bcm4908_enet.c | 6 +++--- + 1 file changed, 3 insertions(+), 3 deletions(-) + +--- a/drivers/net/ethernet/broadcom/bcm4908_enet.c ++++ b/drivers/net/ethernet/broadcom/bcm4908_enet.c +@@ -174,9 +174,6 @@ static int bcm4908_dma_alloc_buf_descs(s + if (!ring->slots) + goto err_free_buf_descs; + +- ring->read_idx = 0; +- ring->write_idx = 0; +- + return 0; + + err_free_buf_descs: +@@ -303,6 +300,9 @@ static void bcm4908_enet_dma_ring_init(s + + enet_write(enet, ring->st_ram_block + ENET_DMA_CH_STATE_RAM_BASE_DESC_PTR, + (uint32_t)ring->dma_addr); ++ ++ ring->read_idx = 0; ++ ring->write_idx = 0; + } + + static void bcm4908_enet_dma_uninit(struct bcm4908_enet *enet) diff --git a/target/linux/bcm4908/patches-5.10/078-v6.1-net-broadcom-bcm4908_enet-handle-EPROBE_DEFER-when-g.patch b/target/linux/bcm4908/patches-5.10/078-v6.1-net-broadcom-bcm4908_enet-handle-EPROBE_DEFER-when-g.patch new file mode 100644 index 0000000000..702b7641fd --- /dev/null +++ b/target/linux/bcm4908/patches-5.10/078-v6.1-net-broadcom-bcm4908_enet-handle-EPROBE_DEFER-when-g.patch @@ -0,0 +1,55 @@ +From e93a766da57fff3273bcb618edf5dfca1fb86b89 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Thu, 15 Sep 2022 15:30:13 +0200 +Subject: [PATCH] net: broadcom: bcm4908_enet: handle -EPROBE_DEFER when + getting MAC +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Reading MAC from OF may return -EPROBE_DEFER if underlaying NVMEM device +isn't ready yet. In such case pass that error code up and "wait" to be +probed later. + +Signed-off-by: Rafał Miłecki +Link: https://lore.kernel.org/r/20220915133013.2243-1-zajec5@gmail.com +Signed-off-by: Jakub Kicinski +--- + drivers/net/ethernet/broadcom/bcm4908_enet.c | 13 +++++++++---- + 1 file changed, 9 insertions(+), 4 deletions(-) + +--- a/drivers/net/ethernet/broadcom/bcm4908_enet.c ++++ b/drivers/net/ethernet/broadcom/bcm4908_enet.c +@@ -714,7 +714,9 @@ static int bcm4908_enet_probe(struct pla + return err; + + SET_NETDEV_DEV(netdev, &pdev->dev); +- of_get_mac_address(dev->of_node, netdev->dev_addr); ++ err = of_get_mac_address(dev->of_node, netdev->dev_addr); ++ if (err == -EPROBE_DEFER) ++ goto err_dma_free; + if (!is_valid_ether_addr(netdev->dev_addr)) + eth_hw_addr_random(netdev); + netdev->netdev_ops = &bcm4908_enet_netdev_ops; +@@ -725,14 +727,17 @@ static int bcm4908_enet_probe(struct pla + netif_napi_add(netdev, &enet->rx_ring.napi, bcm4908_enet_poll_rx, NAPI_POLL_WEIGHT); + + err = register_netdev(netdev); +- if (err) { +- bcm4908_enet_dma_free(enet); +- return err; +- } ++ if (err) ++ goto err_dma_free; + + platform_set_drvdata(pdev, enet); + + return 0; ++ ++err_dma_free: ++ bcm4908_enet_dma_free(enet); ++ ++ return err; + } + + static int bcm4908_enet_remove(struct platform_device *pdev) diff --git a/target/linux/bcm4908/patches-5.10/170-net-broadcom-bcm4908_enet-reset-DMA-rings-sw-indexes.patch b/target/linux/bcm4908/patches-5.10/170-net-broadcom-bcm4908_enet-reset-DMA-rings-sw-indexes.patch deleted file mode 100644 index 7e82230f9a..0000000000 --- a/target/linux/bcm4908/patches-5.10/170-net-broadcom-bcm4908_enet-reset-DMA-rings-sw-indexes.patch +++ /dev/null @@ -1,43 +0,0 @@ -From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= -Date: Tue, 22 Jun 2021 07:05:04 +0200 -Subject: [PATCH] net: broadcom: bcm4908_enet: reset DMA rings sw indexes - properly -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Resetting software indexes in bcm4908_dma_alloc_buf_descs() is not -enough as it's called during device probe only. Driver resets DMA on -every .ndo_open callback and it's required to reset indexes then. - -This fixes inconsistent rings state and stalled traffic after interface -down & up sequence. - -Fixes: 4feffeadbcb2 ("net: broadcom: bcm4908enet: add BCM4908 controller driver") -Signed-off-by: Rafał Miłecki ---- - drivers/net/ethernet/broadcom/bcm4908_enet.c | 6 +++--- - 1 file changed, 3 insertions(+), 3 deletions(-) - ---- a/drivers/net/ethernet/broadcom/bcm4908_enet.c -+++ b/drivers/net/ethernet/broadcom/bcm4908_enet.c -@@ -174,9 +174,6 @@ static int bcm4908_dma_alloc_buf_descs(s - if (!ring->slots) - goto err_free_buf_descs; - -- ring->read_idx = 0; -- ring->write_idx = 0; -- - return 0; - - err_free_buf_descs: -@@ -303,6 +300,9 @@ static void bcm4908_enet_dma_ring_init(s - - enet_write(enet, ring->st_ram_block + ENET_DMA_CH_STATE_RAM_BASE_DESC_PTR, - (uint32_t)ring->dma_addr); -+ -+ ring->read_idx = 0; -+ ring->write_idx = 0; - } - - static void bcm4908_enet_dma_uninit(struct bcm4908_enet *enet)