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Date: Mon, 2 Nov 2015 17:25:04 +0000
From: "Nelson, Shannon" <shannon.nelson@...el.com>
To: Sowmini Varadhan <sowmini.varadhan@...cle.com>,
"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC: "Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
"Wyborny, Carolyn" <carolyn.wyborny@...el.com>,
"Skidmore, Donald C" <donald.c.skidmore@...el.com>,
"Vick, Matthew" <matthew.vick@...el.com>,
"Ronciak, John" <john.ronciak@...el.com>,
"Williams, Mitch A" <mitch.a.williams@...el.com>,
"andy.shevchenko@...il.com" <andy.shevchenko@...il.com>
Subject: RE: [PATCH v4 RFC net] i40e: Look up MAC address in Open Firmware
or IDPROM
> -----Original Message-----
> From: Sowmini Varadhan [mailto:sowmini.varadhan@...cle.com]
> Sent: Sunday, November 01, 2015 8:25 AM
>
> This is the i40e equivalent of commit c762dff24c06 ("ixgbe: Look up MAC
> address in Open Firmware or IDPROM").
>
> As with that fix, attempt to look up the MAC address in Open Firmware
> on systems that support it, and use IDPROM on SPARC if no OF address
> is found.
>
> In the case of the i40e there is an assumption that the default mac
> address has already been set up as the primary mac filter on probe,
> so if this filter is obtained from the Open Firmware or IDPROM, an
> explicit write is needed via i40e_aq_mac_address_write() and
> i40e_aq_add_macvlan() invocation.
>
> Reviewers: please check if invoking i40e_macaddr_init() on
> platforms that use the default mac address (i.e., when it is not from
> OF or idprom) will cause harm, and if it is necessary/possible to
> move this invocation to an earlier point in i40e_probe().
>
> Reviewed-by: Martin K. Petersen <martin.petersen@...cle.com>
> Signed-off-by: Sowmini Varadhan <sowmini.varadhan@...cle.com>
> ---
> v2, v3: Andy Shevchenko comments
> v4:
Thanks, Sowmini, this looks reasonable to me, aside from a few simple stylistic comments below.
sln
>
> drivers/net/ethernet/intel/i40e/i40e_main.c | 53
> ++++++++++++++++++++++++++-
> 1 files changed, 52 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
> b/drivers/net/ethernet/intel/i40e/i40e_main.c
> index b825f97..3c81c0c 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> @@ -24,6 +24,15 @@
> *
>
> **************************************************************************
> ****/
>
> +#include <linux/etherdevice.h>
> +#include <linux/of_net.h>
> +#include <linux/pci.h>
> +
> +#ifdef CONFIG_SPARC
> +#include <asm/idprom.h>
> +#include <asm/prom.h>
> +#endif
> +
> /* Local includes */
> #include "i40e.h"
> #include "i40e_diag.h"
> @@ -9212,6 +9221,25 @@ static struct i40e_vsi
> *i40e_vsi_reinit_setup(struct i40e_vsi *vsi)
> return NULL;
> }
>
Please add a function comment in the style of the rest of the code.
> +static int i40e_macaddr_init( struct i40e_vsi *vsi, u8 *macaddr)
No space between '(' and 'struct'
> +{
> + int ret;
> + struct i40e_aqc_add_macvlan_element_data element;
> +
> + ret = i40e_aq_mac_address_write(&vsi->back->hw,
> + I40E_AQC_WRITE_TYPE_LAA_WOL,
> + macaddr, NULL);
> + if (ret)
> + return -EADDRNOTAVAIL;
Please report the AQ error here as we do elsewhere in the code
> +
> + memset(&element, 0, sizeof(element));
> + ether_addr_copy(element.mac_addr, macaddr);
> + element.flags = cpu_to_le16(I40E_AQC_MACVLAN_ADD_PERFECT_MATCH);
> + i40e_aq_add_macvlan(&vsi->back->hw, vsi->seid, &element, 1, NULL);
Please check for and report any AQ error returned from this call as we do elsewhere in the code.
> +
> + return ret;
> +}
> +
> /**
> * i40e_vsi_setup - Set up a VSI by a given type
> * @pf: board private structure
> @@ -9341,6 +9369,9 @@ struct i40e_vsi *i40e_vsi_setup(struct i40e_pf *pf,
> u8 type,
> ret = i40e_config_netdev(vsi);
> if (ret)
> goto err_netdev;
> + ret = i40e_macaddr_init(vsi, pf->hw.mac.addr);
> + if (ret)
> + goto err_netdev;
> ret = register_netdev(vsi->netdev);
> if (ret)
> goto err_netdev;
> @@ -10162,6 +10193,24 @@ static void i40e_print_features(struct i40e_pf
> *pf)
> kfree(string);
> }
>
Function comment needed
> +static int i40e_get_platform_mac_addr(struct pci_dev *pdev, u8 *mac_addr)
> +{
> + struct device_node *dp = pci_device_to_OF_node(pdev);
> + const unsigned char *addr;
> +
> + addr = of_get_mac_address(dp);
> + if (addr) {
> + ether_addr_copy(mac_addr, addr);
> + return 0;
> + }
> +#ifdef CONFIG_SPARC
> + ether_addr_copy(mac_addr, idprom->id_ethaddr);
> + return 0;
> +#else
> + return -EINVAL;
> +#endif /* CONFIG_SPARC */
> +}
> +
> /**
> * i40e_probe - Device initialization routine
> * @pdev: PCI device information struct
> @@ -10360,7 +10409,9 @@ static int i40e_probe(struct pci_dev *pdev, const
> struct pci_device_id *ent)
> i40e_aq_stop_lldp(hw, true, NULL);
> }
>
> - i40e_get_mac_addr(hw, hw->mac.addr);
> + err = i40e_get_platform_mac_addr(pdev, hw->mac.addr);
> + if (err)
> + i40e_get_mac_addr(hw, hw->mac.addr);
> if (!is_valid_ether_addr(hw->mac.addr)) {
> dev_info(&pdev->dev, "invalid MAC address %pM\n", hw-
> >mac.addr);
> err = -EIO;
> --
> 1.7.1
--
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