From c7472ec4a00c298d2b55c0aa945b8a4c10f6f898 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Mon, 24 Jul 2017 16:59:01 +1000 Subject: ftgmac100: Increase reset timeout We had reports of 50us not being sufficient to reset the MAC, thus hitting the "Hardware reset failed" error bringing the interface up on some AST2400 based machines. This bumps the timeout to 200us. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: David S. Miller --- drivers/net/ethernet/faraday/ftgmac100.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/net/ethernet/faraday/ftgmac100.c') diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index 95bf5e89cfd1..bfda0b2e2b82 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -125,7 +125,7 @@ static int ftgmac100_reset_mac(struct ftgmac100 *priv, u32 maccr) iowrite32(maccr, priv->base + FTGMAC100_OFFSET_MACCR); iowrite32(maccr | FTGMAC100_MACCR_SW_RST, priv->base + FTGMAC100_OFFSET_MACCR); - for (i = 0; i < 50; i++) { + for (i = 0; i < 200; i++) { unsigned int maccr; maccr = ioread32(priv->base + FTGMAC100_OFFSET_MACCR); -- cgit v1.2.3 From d57b9db1ae0cde366c9cc6b038cb1e8ff05557a1 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Mon, 24 Jul 2017 16:59:07 +1000 Subject: ftgmac100: Make the MDIO bus a child of the ethernet device Populate mii_bus->parent with our own platform device before registering, which makes it easier to locate the MDIO bus in sysfs when trying to diagnose problems. Signed-off-by: Benjamin Herrenschmidt Acked-by: Joel Stanley Signed-off-by: David S. Miller --- drivers/net/ethernet/faraday/ftgmac100.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/net/ethernet/faraday/ftgmac100.c') diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index bfda0b2e2b82..cdb979440ca5 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -1682,6 +1682,7 @@ static int ftgmac100_setup_mdio(struct net_device *netdev) priv->mii_bus->name = "ftgmac100_mdio"; snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%d", pdev->name, pdev->id); + priv->mii_bus->parent = priv->dev; priv->mii_bus->priv = priv->netdev; priv->mii_bus->read = ftgmac100_mdiobus_read; priv->mii_bus->write = ftgmac100_mdiobus_write; -- cgit v1.2.3 From 6cee9d649cd1824a4d9ce6940dd716f2bf2ef24f Mon Sep 17 00:00:00 2001 From: Joel Stanley Date: Tue, 25 Jul 2017 10:19:01 +0930 Subject: ftgmac100: return error in ftgmac100_alloc_rx_buf The error paths set err, but it's not returned. I wondered if we should fix all of the callers to check the returned value, but Ben explains why the code is this way: > Most call sites ignore it on purpose. There's nothing we can do if > we fail to get a buffer at interrupt time, so we point the buffer to > the scratch page so the HW doesn't DMA into lalaland and lose the > packet. > > The one call site that tests and can fail is the one used when brining > the interface up. If we fail to allocate at that point, we fail the > ifup. But as you noticed, I do have a bug not returning the error. Acked-by: Benjamin Herrenschmidt Signed-off-by: Joel Stanley Signed-off-by: David S. Miller --- drivers/net/ethernet/faraday/ftgmac100.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/net/ethernet/faraday/ftgmac100.c') diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index cdb979440ca5..34dae51effd4 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -392,7 +392,7 @@ static int ftgmac100_alloc_rx_buf(struct ftgmac100 *priv, unsigned int entry, struct net_device *netdev = priv->netdev; struct sk_buff *skb; dma_addr_t map; - int err; + int err = 0; skb = netdev_alloc_skb_ip_align(netdev, RX_BUF_SIZE); if (unlikely(!skb)) { @@ -428,7 +428,7 @@ static int ftgmac100_alloc_rx_buf(struct ftgmac100 *priv, unsigned int entry, else rxdes->rxdes0 = 0; - return 0; + return err; } static unsigned int ftgmac100_next_rx_pointer(struct ftgmac100 *priv, -- cgit v1.2.3 From 5160a153a00ef24dc3a47c215e21fbc197f60887 Mon Sep 17 00:00:00 2001 From: Andrew Jeffery Date: Tue, 22 Aug 2017 16:06:22 +0930 Subject: net: ftgmac100: Fix oops in probe on failure to find associated PHY netif_napi_del() should be paired with netif_napi_add(), however no such call takes place in ftgmac100_probe(). This triggers a NULL pointer dereference if e.g. no PHY is found by the MDIO probe: [ 2.770000] libphy: Fixed MDIO Bus: probed [ 2.770000] ftgmac100 1e660000.ethernet: Generated random MAC address 66:58:c0:5a:50:b8 [ 2.790000] libphy: ftgmac100_mdio: probed [ 2.790000] ftgmac100 1e660000.ethernet (unnamed net_device) (uninitialized): eth%d: no PHY found [ 2.790000] ftgmac100 1e660000.ethernet: MII Probe failed! [ 2.810000] Unable to handle kernel NULL pointer dereference at virtual address 00000004 [ 2.810000] pgd = 80004000 [ 2.810000] [00000004] *pgd=00000000 [ 2.810000] Internal error: Oops: 805 [#1] ARM [ 2.810000] CPU: 0 PID: 1 Comm: swapper Not tainted 4.10.17-1a4df30c39cf5ee0e3d2528c409787ccbb4a672a #1 [ 2.810000] Hardware name: ASpeed SoC [ 2.810000] task: 9e421b60 task.stack: 9e4a0000 [ 2.810000] PC is at netif_napi_del+0x74/0xa4 [ 2.810000] LR is at ftgmac100_probe+0x290/0x674 [ 2.810000] pc : [<80331004>] lr : [<80292b30>] psr: 60000013 [ 2.810000] sp : 9e4a1d70 ip : 9e4a1d88 fp : 9e4a1d84 [ 2.810000] r10: 9e565000 r9 : ffffffed r8 : 00000007 [ 2.810000] r7 : 9e565480 r6 : 9ec072c0 r5 : 00000000 r4 : 9e5654d8 [ 2.810000] r3 : 9e565530 r2 : 00000000 r1 : 00000000 r0 : 9e5654d8 [ 2.810000] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 2.810000] Control: 00c5387d Table: 80004008 DAC: 00000055 [ 2.810000] Process swapper (pid: 1, stack limit = 0x9e4a0188) [ 2.810000] Stack: (0x9e4a1d70 to 0x9e4a2000) [ 2.810000] 1d60: 9e565000 9e549e10 9e4a1dcc 9e4a1d88 [ 2.810000] 1d80: 80292b30 80330f9c ffffffff 9e4a1d98 80146058 9ec072c0 00009e10 00000000 [ 2.810000] 1da0: 9e549e18 9e549e10 ffffffed 805f81f4 fffffdfb 00000000 00000000 00000000 [ 2.810000] 1dc0: 9e4a1dec 9e4a1dd0 80243df8 802928ac 9e549e10 8062cbd8 8062cbe0 805f81f4 [ 2.810000] 1de0: 9e4a1e24 9e4a1df0 80242178 80243da4 803001d0 802ffa60 9e4a1e24 9e549e10 [ 2.810000] 1e00: 9e549e44 805f81f4 00000000 00000000 805b8840 8058a6b0 9e4a1e44 9e4a1e28 [ 2.810000] 1e20: 80242434 80241f04 00000000 805f81f4 80242344 00000000 9e4a1e6c 9e4a1e48 [ 2.810000] 1e40: 80240148 80242350 9e425bac 9e4fdc90 9e790e94 805f81f4 9e790e60 805f5640 [ 2.810000] 1e60: 9e4a1e7c 9e4a1e70 802425dc 802400d8 9e4a1ea4 9e4a1e80 80240ba8 802425c0 [ 2.810000] 1e80: 8050b6ac 9e4a1e90 805f81f4 ffffe000 805b8838 80616720 9e4a1ebc 9e4a1ea8 [ 2.810000] 1ea0: 80243068 80240a68 805ab24c ffffe000 9e4a1ecc 9e4a1ec0 80244a38 80242fec [ 2.810000] 1ec0: 9e4a1edc 9e4a1ed0 805ab264 80244a04 9e4a1f4c 9e4a1ee0 8058ae70 805ab258 [ 2.810000] 1ee0: 80032c68 801e3fd8 8052f800 8041af2c 9e4a1f4c 9e4a1f00 80032f90 8058a6bc [ 2.810000] 1f00: 9e4a1f2c 9e4a1f10 00000006 00000006 00000000 8052f220 805112f0 00000000 [ 2.810000] 1f20: 9e4a1f4c 00000006 80616720 805cf400 80616720 805b8838 80616720 00000057 [ 2.810000] 1f40: 9e4a1f94 9e4a1f50 8058b040 8058add0 00000006 00000006 00000000 8058a6b0 [ 2.810000] 1f60: 3940bf3d 00000007 f115c2e8 00000000 803fd158 00000000 00000000 00000000 [ 2.810000] 1f80: 00000000 00000000 9e4a1fac 9e4a1f98 803fd170 8058af38 00000000 803fd158 [ 2.810000] 1fa0: 00000000 9e4a1fb0 8000a5e8 803fd164 00000000 00000000 00000000 00000000 [ 2.810000] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 2.810000] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 d11dcae8 af8ddec5 [ 2.810000] [<80331004>] (netif_napi_del) from [<80292b30>] (ftgmac100_probe+0x290/0x674) [ 2.810000] [<80292b30>] (ftgmac100_probe) from [<80243df8>] (platform_drv_probe+0x60/0xc0) [ 2.810000] [<80243df8>] (platform_drv_probe) from [<80242178>] (driver_probe_device+0x280/0x44c) [ 2.810000] [<80242178>] (driver_probe_device) from [<80242434>] (__driver_attach+0xf0/0x104) [ 2.810000] [<80242434>] (__driver_attach) from [<80240148>] (bus_for_each_dev+0x7c/0xb0) [ 2.810000] [<80240148>] (bus_for_each_dev) from [<802425dc>] (driver_attach+0x28/0x30) [ 2.810000] [<802425dc>] (driver_attach) from [<80240ba8>] (bus_add_driver+0x14c/0x268) [ 2.810000] [<80240ba8>] (bus_add_driver) from [<80243068>] (driver_register+0x88/0x104) [ 2.810000] [<80243068>] (driver_register) from [<80244a38>] (__platform_driver_register+0x40/0x54) [ 2.810000] [<80244a38>] (__platform_driver_register) from [<805ab264>] (ftgmac100_driver_init+0x18/0x20) [ 2.810000] [<805ab264>] (ftgmac100_driver_init) from [<8058ae70>] (do_one_initcall+0xac/0x168) [ 2.810000] [<8058ae70>] (do_one_initcall) from [<8058b040>] (kernel_init_freeable+0x114/0x1cc) [ 2.810000] [<8058b040>] (kernel_init_freeable) from [<803fd170>] (kernel_init+0x18/0x104) [ 2.810000] [<803fd170>] (kernel_init) from [<8000a5e8>] (ret_from_fork+0x14/0x2c) [ 2.810000] Code: e594205c e5941058 e2843058 e3a05000 (e5812004) [ 3.210000] ---[ end trace f32811052fd3860c ]--- Signed-off-by: Andrew Jeffery Acked-by: Benjamin Herrenschmidt Signed-off-by: David S. Miller --- drivers/net/ethernet/faraday/ftgmac100.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/net/ethernet/faraday/ftgmac100.c') diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index 34dae51effd4..59da7ac3c108 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -1863,7 +1863,6 @@ err_setup_mdio: err_ioremap: release_resource(priv->res); err_req_mem: - netif_napi_del(&priv->napi); free_netdev(netdev); err_alloc_etherdev: return err; -- cgit v1.2.3 From 51564585d8c6de28931ceff51f73eb800147221d Mon Sep 17 00:00:00 2001 From: Samuel Mendoza-Jonas Date: Mon, 28 Aug 2017 16:18:43 +1000 Subject: ftgmac100: Support NCSI VLAN filtering when available Register the ndo_vlan_rx_{add,kill}_vid callbacks and set the NETIF_F_HW_VLAN_CTAG_FILTER if NCSI is available. This allows the VLAN core to notify the NCSI driver when changes occur so that the remote NCSI channel can be properly configured to filter on the set VLAN tags. Signed-off-by: Samuel Mendoza-Jonas Signed-off-by: David S. Miller --- drivers/net/ethernet/faraday/ftgmac100.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/net/ethernet/faraday/ftgmac100.c') diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index 34dae51effd4..05fe7123d5ae 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -1623,6 +1623,8 @@ static const struct net_device_ops ftgmac100_netdev_ops = { #ifdef CONFIG_NET_POLL_CONTROLLER .ndo_poll_controller = ftgmac100_poll_controller, #endif + .ndo_vlan_rx_add_vid = ncsi_vlan_rx_add_vid, + .ndo_vlan_rx_kill_vid = ncsi_vlan_rx_kill_vid, }; static int ftgmac100_setup_mdio(struct net_device *netdev) @@ -1837,6 +1839,9 @@ static int ftgmac100_probe(struct platform_device *pdev) NETIF_F_GRO | NETIF_F_SG | NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX; + if (priv->use_ncsi) + netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER; + /* AST2400 doesn't have working HW checksum generation */ if (np && (of_device_is_compatible(np, "aspeed,ast2400-mac"))) netdev->hw_features &= ~NETIF_F_HW_CSUM; -- cgit v1.2.3 From 4b70c62b9eafcee0505b440732d2e00c50f3085d Mon Sep 17 00:00:00 2001 From: Joel Stanley Date: Fri, 13 Oct 2017 12:16:38 +0800 Subject: net: ftgmac100: Request clock and set speed According to the ASPEED datasheet, gigabit speeds require a clock of 100MHz or higher. Other speeds require 25MHz or higher. This patch configures a 100MHz clock if the system has a direct-attached PHY, or 25MHz if the system is running NC-SI which is limited to 100MHz. There appear to be no other upstream users of the FTGMAC100 driver it is hard to know the clocking requirements of other platforms. Therefore a conservative approach was taken with enabling clocks. If the platform is not ASPEED, both requesting the clock and configuring the speed is skipped. Signed-off-by: Joel Stanley Tested-by: Andrew Jeffery Signed-off-by: David S. Miller --- drivers/net/ethernet/faraday/ftgmac100.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'drivers/net/ethernet/faraday/ftgmac100.c') diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index 9ed8e4b81530..78db8e62a83f 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -21,6 +21,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include #include #include #include @@ -59,6 +60,9 @@ /* Min number of tx ring entries before stopping queue */ #define TX_THRESHOLD (MAX_SKB_FRAGS + 1) +#define FTGMAC_100MHZ 100000000 +#define FTGMAC_25MHZ 25000000 + struct ftgmac100 { /* Registers */ struct resource *res; @@ -96,6 +100,7 @@ struct ftgmac100 { struct napi_struct napi; struct work_struct reset_task; struct mii_bus *mii_bus; + struct clk *clk; /* Link management */ int cur_speed; @@ -1734,6 +1739,22 @@ static void ftgmac100_ncsi_handler(struct ncsi_dev *nd) nd->link_up ? "up" : "down"); } +static void ftgmac100_setup_clk(struct ftgmac100 *priv) +{ + priv->clk = devm_clk_get(priv->dev, NULL); + if (IS_ERR(priv->clk)) + return; + + clk_prepare_enable(priv->clk); + + /* Aspeed specifies a 100MHz clock is required for up to + * 1000Mbit link speeds. As NCSI is limited to 100Mbit, 25MHz + * is sufficient + */ + clk_set_rate(priv->clk, priv->use_ncsi ? FTGMAC_25MHZ : + FTGMAC_100MHZ); +} + static int ftgmac100_probe(struct platform_device *pdev) { struct resource *res; @@ -1830,6 +1851,9 @@ static int ftgmac100_probe(struct platform_device *pdev) goto err_setup_mdio; } + if (priv->is_aspeed) + ftgmac100_setup_clk(priv); + /* Default ring sizes */ priv->rx_q_entries = priv->new_rx_q_entries = DEF_RX_QUEUE_ENTRIES; priv->tx_q_entries = priv->new_tx_q_entries = DEF_TX_QUEUE_ENTRIES; @@ -1883,6 +1907,8 @@ static int ftgmac100_remove(struct platform_device *pdev) unregister_netdev(netdev); + clk_disable_unprepare(priv->clk); + /* There's a small chance the reset task will have been re-queued, * during stop, make sure it's gone before we free the structure. */ -- cgit v1.2.3