diff options
| author | Todd Fujinaka <todd.fujinaka@intel.com> | 2020-05-28 22:27:12 -0700 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2020-06-25 22:25:13 -0700 |
| commit | 3a2c6ced90e18326ec64b9c4b5f68a2a127004c0 (patch) | |
| tree | eac4d649883b7d6c0ade20c43eb155b27d6bbf61 /drivers/net/ethernet/intel | |
| parent | fffeeddfcf57ebf652e80d27b416de7cb74e3507 (diff) | |
i40e: Add a check to see if MFS is set
A customer was chain-booting to provision his systems and one of the
steps was setting MFS. MFS isn't cleared by normal warm reboots
(clearing requires a GLOBR) and there was no indication of why Jumbo
Frame receives were failing.
Add a warning if MFS is set to anything lower than the default.
Signed-off-by: Todd Fujinaka <todd.fujinaka@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_main.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 841e49e1e091..12d7191c936a 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -15290,6 +15290,14 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent) i40e_stat_str(&pf->hw, err), i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status)); + /* make sure the MFS hasn't been set lower than the default */ +#define MAX_FRAME_SIZE_DEFAULT 0x2600 + val = (rd32(&pf->hw, I40E_PRTGL_SAH) & + I40E_PRTGL_SAH_MFS_MASK) >> I40E_PRTGL_SAH_MFS_SHIFT; + if (val < MAX_FRAME_SIZE_DEFAULT) + dev_warn(&pdev->dev, "MFS for port %x has been set below the default: %x\n", + i, val); + /* Add a filter to drop all Flow control frames from any VSI from being * transmitted. By doing so we stop a malicious VF from sending out * PAUSE or PFC frames and potentially controlling traffic for other |