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| author | Jacob Keller <jacob.e.keller@intel.com> | 2016-06-08 02:08:59 +0300 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2016-07-21 01:22:15 +0300 |
| commit | 0afd20e5573c4aa976f1b935b6df73592b46ded5 (patch) | |
| tree | a43dda1a43ef7e00452848462388de2fefeaea44 /drivers/net/ethernet/intel/fm10k/fm10k_pf.c | |
| parent | 9d7dbf0604d37f8cae0c6d184a646037636a8b30 (diff) | |
| download | linux-0afd20e5573c4aa976f1b935b6df73592b46ded5.tar.xz | |
fm10k: implement request_lport_map pointer
If the fm10k interface is brought up, but the switch manager software is
not running, the driver will continuously request the lport map every
few seconds in the base driver watchdog routine. Eventually after
several minutes the switch mailbox Tx fifo will fill up and the mailbox
will timeout, resulting in a reset. This reset will appear as if for no
reason, and occurs regularly every few minutes until the switch manager
software is loaded.
Prevent this from happening by only requesting the lport map after we've
verified the switch mailbox is tx_ready. In order to simplify code logic
and reduce code duplication, implement this as a new function pointer
"mac.ops.request_lport_map" which the VF will not implement. Otherwise,
we have to duplicate the tx_ready check outside of
fm10k_get_host_state_generic, or re-implement most of
fm10k_get_host_state_generic in the pf version.
The resulting code is simpler and easier to understand, and prevents the
PF from continuously requesting lport map and filling the Tx fifo of
a switch mailbox that isn't ready.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/fm10k/fm10k_pf.c')
| -rw-r--r-- | drivers/net/ethernet/intel/fm10k/fm10k_pf.c | 15 |
1 files changed, 3 insertions, 12 deletions
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c index 23f3566b17fc..682299dd0ce4 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c +++ b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c @@ -1622,25 +1622,15 @@ static s32 fm10k_request_lport_map_pf(struct fm10k_hw *hw) **/ static s32 fm10k_get_host_state_pf(struct fm10k_hw *hw, bool *switch_ready) { - s32 ret_val = 0; u32 dma_ctrl2; /* verify the switch is ready for interaction */ dma_ctrl2 = fm10k_read_reg(hw, FM10K_DMA_CTRL2); if (!(dma_ctrl2 & FM10K_DMA_CTRL2_SWITCH_READY)) - goto out; + return 0; /* retrieve generic host state info */ - ret_val = fm10k_get_host_state_generic(hw, switch_ready); - if (ret_val) - goto out; - - /* interface cannot receive traffic without logical ports */ - if (hw->mac.dglort_map == FM10K_DGLORTMAP_NONE) - ret_val = fm10k_request_lport_map_pf(hw); - -out: - return ret_val; + return fm10k_get_host_state_generic(hw, switch_ready); } /* This structure defines the attibutes to be parsed below */ @@ -1816,6 +1806,7 @@ static const struct fm10k_mac_ops mac_ops_pf = { .set_dma_mask = fm10k_set_dma_mask_pf, .get_fault = fm10k_get_fault_pf, .get_host_state = fm10k_get_host_state_pf, + .request_lport_map = fm10k_request_lport_map_pf, }; static const struct fm10k_iov_ops iov_ops_pf = { |