diff options
author | Jacob Keller <jacob.e.keller@intel.com> | 2016-04-02 02:17:33 +0300 |
---|---|---|
committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2016-04-21 09:06:22 +0300 |
commit | a7a7783adabc3cc7599f7dbf97fcc3b0d44087b7 (patch) | |
tree | 49eb6a052470059213ab44d000a1f8aca4490772 /drivers/net/ethernet | |
parent | 8998763a7b57583ef2e07f68ea6a7d05bcfc1cfa (diff) | |
download | linux-a7a7783adabc3cc7599f7dbf97fcc3b0d44087b7.tar.xz |
fm10k: correctly handle LPORT_MAP error
Currently, any error responses from the switch manager after an
LPORT_MAP request are silently ignored. At most the mailbox message will
be reported as an error. This can result in unexpected behavior when the
switch manager has configured a port with zero bandwidth. Add support
for reading the fm10k_swapi_error structure from LPORT_MAP responses.
If the message contains the necessary TLV and has a non-zero error code,
report link down, clear the dglort_map, and delay the next
get_host_state call by a reasonable delay. Also log an error message
indicating that the LPORT_MAP request failed.
The delay ensures preventing an interrupt storm on the switch manager,
and reduces the number of mailbox messages we send in this scenario
drastically.
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')
-rw-r--r-- | drivers/net/ethernet/intel/fm10k/fm10k.h | 1 | ||||
-rw-r--r-- | drivers/net/ethernet/intel/fm10k/fm10k_pci.c | 31 | ||||
-rw-r--r-- | drivers/net/ethernet/intel/fm10k/fm10k_pf.c | 2 | ||||
-rw-r--r-- | drivers/net/ethernet/intel/fm10k/fm10k_pf.h | 2 |
4 files changed, 35 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k.h b/drivers/net/ethernet/intel/fm10k/fm10k.h index c21fa8699fc4..5efae40698cc 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k.h +++ b/drivers/net/ethernet/intel/fm10k/fm10k.h @@ -330,6 +330,7 @@ struct fm10k_intfc { unsigned long last_reset; unsigned long link_down_event; bool host_ready; + bool lport_map_failed; u32 reta[FM10K_RETA_SIZE]; u32 rssrk[FM10K_RSSRK_SIZE]; diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c index 29e9402c4352..9055681cf34d 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c +++ b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c @@ -1263,11 +1263,40 @@ static s32 fm10k_lport_map(struct fm10k_hw *hw, u32 **results, u32 dglort_map = hw->mac.dglort_map; s32 err; + interface = container_of(hw, struct fm10k_intfc, hw); + + err = fm10k_msg_err_pf(hw, results, mbx); + if (!err && hw->swapi.status) { + /* force link down for a reasonable delay */ + interface->link_down_event = jiffies + (2 * HZ); + set_bit(__FM10K_LINK_DOWN, &interface->state); + + /* reset dglort_map back to no config */ + hw->mac.dglort_map = FM10K_DGLORTMAP_NONE; + + fm10k_service_event_schedule(interface); + + /* prevent overloading kernel message buffer */ + if (interface->lport_map_failed) + return 0; + + interface->lport_map_failed = true; + + if (hw->swapi.status == FM10K_MSG_ERR_PEP_NOT_SCHEDULED) + dev_warn(&interface->pdev->dev, + "cannot obtain link because the host interface is configured for a PCIe host interface bandwidth of zero\n"); + dev_warn(&interface->pdev->dev, + "request logical port map failed: %d\n", + hw->swapi.status); + + return 0; + } + err = fm10k_msg_lport_map_pf(hw, results, mbx); if (err) return err; - interface = container_of(hw, struct fm10k_intfc, hw); + interface->lport_map_failed = false; /* we need to reset if port count was just updated */ if (dglort_map != hw->mac.dglort_map) diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c index c8e8ce5a8327..865f5c2da9d0 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c +++ b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c @@ -1620,6 +1620,8 @@ out: /* This structure defines the attibutes to be parsed below */ const struct fm10k_tlv_attr fm10k_lport_map_msg_attr[] = { + FM10K_TLV_ATTR_LE_STRUCT(FM10K_PF_ATTR_ID_ERR, + sizeof(struct fm10k_swapi_error)), FM10K_TLV_ATTR_U32(FM10K_PF_ATTR_ID_LPORT_MAP), FM10K_TLV_ATTR_LAST }; diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pf.h b/drivers/net/ethernet/intel/fm10k/fm10k_pf.h index b78210d06213..d4a34657b861 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k_pf.h +++ b/drivers/net/ethernet/intel/fm10k/fm10k_pf.h @@ -71,6 +71,8 @@ enum fm10k_pf_tlv_attr_id_v1 { #define FM10K_MSG_UPDATE_PVID_PVID_SHIFT 16 #define FM10K_MSG_UPDATE_PVID_PVID_SIZE 16 +#define FM10K_MSG_ERR_PEP_NOT_SCHEDULED 280 + /* The following data structures are overlayed directly onto TLV mailbox * messages, and must not break 4 byte alignment. Ensure the structures line * up correctly as per their TLV definition. |