diff options
| author | Aravindhan Gunasekaran <aravindhan.gunasekaran@intel.com> | 2021-08-09 20:23:40 +0530 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2021-08-27 09:31:09 -0700 |
| commit | 1ab011b0bf073ef02abf15344bb59e383aa15457 (patch) | |
| tree | 83e2df411d34dcf982dccec4c1bf2d9bca26b853 /drivers/net/ethernet/intel/igc/igc.h | |
| parent | 61572d5f8f91d8603d8db028e1ec9e18fc0ca245 (diff) | |
igc: Add support for CBS offloading
Implement support for Credit-based shaper(CBS) Qdisc hardware
offload mode in the driver. There are two sets of IEEE802.1Qav
(CBS) HW logic in i225 controller and this patch supports
enabling them in the top two priority TX queues.
Driver implemented as recommended by Foxville External
Architecture Specification v0.993. Idleslope and Hi-credit are
the CBS tunable parameters for i225 NIC, programmed in TQAVCC
and TQAVHC registers respectively.
In-order for IEEE802.1Qav (CBS) algorithm to work as intended
and provide BW reservation CBS should be enabled in highest
priority queue first. If we enable CBS on any of low priority
queues, the traffic in high priority queue does not allow low
priority queue to be selected for transmission and bandwidth
reservation is not guaranteed.
Signed-off-by: Aravindhan Gunasekaran <aravindhan.gunasekaran@intel.com>
Signed-off-by: Mallikarjuna Chilakala <mallikarjuna.chilakala@intel.com>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/igc/igc.h')
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h index b561beb1e623..3e386c38d016 100644 --- a/drivers/net/ethernet/intel/igc/igc.h +++ b/drivers/net/ethernet/intel/igc/igc.h @@ -98,6 +98,13 @@ struct igc_ring { u32 start_time; u32 end_time; + /* CBS parameters */ + bool cbs_enable; /* indicates if CBS is enabled */ + s32 idleslope; /* idleSlope in kbps */ + s32 sendslope; /* sendSlope in kbps */ + s32 hicredit; /* hiCredit in bytes */ + s32 locredit; /* loCredit in bytes */ + /* everything past this point are written often */ u16 next_to_clean; u16 next_to_use; @@ -290,8 +297,10 @@ extern char igc_driver_name[]; #define IGC_FLAG_VLAN_PROMISC BIT(15) #define IGC_FLAG_RX_LEGACY BIT(16) #define IGC_FLAG_TSN_QBV_ENABLED BIT(17) +#define IGC_FLAG_TSN_QAV_ENABLED BIT(18) -#define IGC_FLAG_TSN_ANY_ENABLED IGC_FLAG_TSN_QBV_ENABLED +#define IGC_FLAG_TSN_ANY_ENABLED \ + (IGC_FLAG_TSN_QBV_ENABLED | IGC_FLAG_TSN_QAV_ENABLED) #define IGC_FLAG_RSS_FIELD_IPV4_UDP BIT(6) #define IGC_FLAG_RSS_FIELD_IPV6_UDP BIT(7) |