lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
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.

Powered by blists - more mailing lists