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Message-ID: <bf1a98e1-399f-47b0-bc2e-ae978c28d26c@pp.inet.fi>
Date: Mon, 13 Apr 2020 14:40:43 +0300
From: Lauri Jakku <lauri.jakku@...inet.fi>
To: Heiner Kallweit <hkallweit1@...il.com>,
Leon Romanovsky <leon@...nel.org>
Cc: netdev@...r.kernel.org, nic_swsd@...ltek.com
Subject: Re: NET: r8168/r8169 identifying fix
Hi,
What i did was fix my problem: The old way of just checking the pointer, did not work correctly. I do have
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 03)
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 03)
NIC's integrated to motherboard. Without this patch: They will not get recognised: at boot, or with rmmod/modprobe cycle, neither
works.
--> The oldway is not what has been documented sequence.
On 2020-04-13 14:28, Heiner Kallweit wrote:
> On 13.04.2020 13:06, Lauri Jakku wrote:
>> Hi,
>>
>> Modified as suggested:
>>
>> >From f4fba16025260bf08f0df867c3de51803ddb78ef Mon Sep 17 00:00:00 2001
>> From: Lauri Jakku <lja@....fi>
>> Date: Mon, 13 Apr 2020 13:18:35 +0300
>> Subject: [PATCH] NET: r8168/r8169 identifying fix
>>
>> The driver installation determination made properly by
>> checking PHY vs DRIVER id's.
>> ---
>> drivers/net/ethernet/realtek/r8169_main.c | 70 ++++++++++++++++++++---
>> drivers/net/phy/mdio_bus.c | 11 +++-
>> 2 files changed, 72 insertions(+), 9 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
>> index bf5bf05970a2..2384da7d2988 100644
>> --- a/drivers/net/ethernet/realtek/r8169_main.c
>> +++ b/drivers/net/ethernet/realtek/r8169_main.c
>> @@ -5149,6 +5149,9 @@ static int r8169_mdio_register(struct rtl8169_private *tp)
>> {
>> struct pci_dev *pdev = tp->pci_dev;
>> struct mii_bus *new_bus;
>> + u32 phydev_id = 0;
>> + u32 phydrv_id = 0;
>> + u32 phydrv_id_mask = 0;
>> int ret;
>>
>> new_bus = devm_mdiobus_alloc(&pdev->dev);
>> @@ -5165,20 +5168,62 @@ static int r8169_mdio_register(struct rtl8169_private *tp)
>> new_bus->write = r8169_mdio_write_reg;
>>
>> ret = mdiobus_register(new_bus);
>> + dev_info(&pdev->dev,
>> + "mdiobus_register: %s, %d\n",
>> + new_bus->id, ret);
>> if (ret)
>> return ret;
>>
>> tp->phydev = mdiobus_get_phy(new_bus, 0);
>> +
>> if (!tp->phydev) {
>> mdiobus_unregister(new_bus);
>> return -ENODEV;
>> - } else if (!tp->phydev->drv) {
>> - /* Most chip versions fail with the genphy driver.
>> - * Therefore ensure that the dedicated PHY driver is loaded.
>> - */
>> - dev_err(&pdev->dev, "realtek.ko not loaded, maybe it needs to be added to initramfs?\n");
>> - mdiobus_unregister(new_bus);
>> - return -EUNATCH;
>> + } else {
>> + /* tp -> phydev ok */
>> + int everything_OK = 0;
>> +
>> + /* Check driver id versus phy */
>> +
>> + if (tp->phydev->drv) {
>> + u32 phydev_masked = 0xBEEFDEAD;
>> + u32 drv_masked = ~0;
>> + u32 phydev_match = ~0;
>> + u32 drv_match = 0xDEADBEEF;
>> +
>> + phydev_id = tp->phydev->phy_id;
>> + phydrv_id = tp->phydev->drv->phy_id;
>> + phydrv_id_mask = tp->phydev->drv->phy_id_mask;
>> +
>> + drv_masked = phydrv_id & phydrv_id_mask;
>> + phydev_masked = phydev_id & phydrv_id_mask;
>> +
>> + dev_debug(&pdev->dev,
>> + "%s: ID Check: (%x -> %x), drv (%x -> %x)\n",
>> + new_bus->id, phydev_id, phydev_masked,
>> + phydrv_id, drv_masked);
>> +
>> + phydev_match = phydev_masked & drv_masked;
>> + phydev_match = phydev_match == phydev_masked;
>> +
>> + drv_match = phydev_masked & drv_masked;
>> + drv_match = drv_match == drv_masked;
>> +
>> + dev_debug(&pdev->dev, "%s: ID Check: %x == %x\n",
>> + new_bus->id, phydev_match, drv_match);
>> +
>> + everything_OK = (phydev_match == drv_match);
>
> You're doing again what phy_bus_match() did. It's unclear what this should
> be good for. Also it would be helpful if you could explain what the actual
> issue is you're trying to fix, incl. the commit that caused the regression.
> There is one known issue in 5.4.31 with chip versions with RTL8208 PHY.
> This is fixed in 5.4.32.
> Apart from that having r8169 in initramfs can cause issues if realtek.ko
> isn't included too. Most distro's take care by checking softdeps in their
> initramfs mgmt tools. One known exception is Gentoo, as their genkernel
> tool doesn't check softdeps.
>
>
>> + }
>> +
>> + if (!everything_OK) {
>> + /* Most chip versions fail with the genphy driver.
>> + * Therefore ensure that the dedicated PHY driver
>> + * is loaded.
>> + */
>> + dev_err(&pdev->dev, "realtek.ko not loaded, maybe it needs to be added to initramfs?\n");
>> + mdiobus_unregister(new_bus);
>> + return -EUNATCH;
>> + }
>> }
>>
>> /* PHY will be woken up in rtl_open() */
>> @@ -5435,6 +5480,7 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
>> u64_stats_init(&tp->rx_stats.syncp);
>> u64_stats_init(&tp->tx_stats.syncp);
>>
>> + dev_dbg(&pdev->dev, "init: MAC\n");
>> rtl_init_mac_address(tp);
>>
>> dev->ethtool_ops = &rtl8169_ethtool_ops;
>> @@ -5483,12 +5529,15 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
>> dev->hw_features |= NETIF_F_RXFCS;
>>
>> jumbo_max = rtl_jumbo_max(tp);
>> + dev_dbg(&pdev->dev, "init: jumbo max: %d\n", jumbo_max);
>> if (jumbo_max)
>> dev->max_mtu = jumbo_max;
>>
>> + dev_dbg(&pdev->dev, "init: irq mask\n");
>> rtl_set_irq_mask(tp);
>>
>> tp->fw_name = rtl_chip_infos[chipset].fw_name;
>> + dev_dbg(&pdev->dev, "init: FW name: %s\n", tp->fw_name);
>>
>> tp->counters = dmam_alloc_coherent (&pdev->dev, sizeof(*tp->counters),
>> &tp->counters_phys_addr,
>> @@ -5496,16 +5545,21 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
>> if (!tp->counters)
>> return -ENOMEM;
>>
>> + dev_dbg(&pdev->dev, "init: set driver data\n");
>> pci_set_drvdata(pdev, dev);
>>
>> + dev_dbg(&pdev->dev, "init: register mdio\n");
>> rc = r8169_mdio_register(tp);
>> + dev_dbg(&pdev->dev, "init: mdio register: %d\n", rc);
>> if (rc)
>> return rc;
>>
>> /* chip gets powered up in rtl_open() */
>> + dev_dbg(&pdev->dev, "init: pll pwr down\n");
>> rtl_pll_power_down(tp);
>>
>> rc = register_netdev(dev);
>> + dev_dbg(&pdev->dev, "init: netdev register: %d\n", rc);
>> if (rc)
>> goto err_mdio_unregister;
>>
>> @@ -5525,6 +5579,8 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
>> if (pci_dev_run_wake(pdev))
>> pm_runtime_put_sync(&pdev->dev);
>>
>> + dev_dbg(&pdev->dev, "init: ALL DONE!\n");
>> +
>> return 0;
>>
>> err_mdio_unregister:
>> diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
>> index 522760c8bca6..719ea48164f6 100644
>> --- a/drivers/net/phy/mdio_bus.c
>> +++ b/drivers/net/phy/mdio_bus.c
>> @@ -112,6 +112,9 @@ EXPORT_SYMBOL(mdiobus_unregister_device);
>> struct phy_device *mdiobus_get_phy(struct mii_bus *bus, int addr)
>> {
>> struct mdio_device *mdiodev = bus->mdio_map[addr];
>> + struct phy_device *rv = NULL;
>> +
>> + pr_debug("mii_bus %s addr %d, %p\n", bus->id, addr, mdiodev);
>>
>> if (!mdiodev)
>> return NULL;
>> @@ -119,7 +122,10 @@ struct phy_device *mdiobus_get_phy(struct mii_bus *bus, int addr)
>> if (!(mdiodev->flags & MDIO_DEVICE_FLAG_PHY))
>> return NULL;
>>
>> - return container_of(mdiodev, struct phy_device, mdio);
>> + rv = container_of(mdiodev, struct phy_device, mdio);
>> + pr_debug("mii_bus OK? %s addr %d, %p -> %p\n",
>> + bus->id, addr, mdiodev, rv);
>> + return rv;
>> }
>> EXPORT_SYMBOL(mdiobus_get_phy);
>>
>> @@ -645,10 +651,11 @@ int __mdiobus_register(struct mii_bus *bus, struct module *owner)
>> mdiobus_setup_mdiodev_from_board_info(bus, mdiobus_create_device);
>>
>> bus->state = MDIOBUS_REGISTERED;
>> - pr_info("%s: probed\n", bus->name);
>> + pr_info("%s: probed (mdiobus_register)\n", bus->name);
>> return 0;
>>
>> error:
>> + pr_err("%s: Error while in mdiobus_register: %d\n", bus->name, err);
>> while (--i >= 0) {
>> mdiodev = bus->mdio_map[i];
>> if (!mdiodev)
>>
>
--
Br,
Lauri J.
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