Commit f00b0da7 authored by Lior Levy's avatar Lior Levy Committed by Jeff Kirsher
Browse files

igb: A fix to VF TX rate limit 



There is a need to configure MMW_SIZE in register RTTBCNRM with a correct
value. For 82576 device, the value should be 0x14.

Signed-off-by: default avatarLior Levy <lior.levy@intel.com>
Tested-by: default avatarJeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 7500673b

drivers/net/ethernet/intel/igb/e1000_regs.h

+1 −0
Original line number Diff line number Diff line
@@ -117,6 +117,7 @@ 


/* TX Rate Limit Registers */

#define E1000_RTTDQSEL	0x3604	/* Tx Desc Plane Queue Select - WO */

#define E1000_RTTBCNRM	0x3690	/* Tx BCN Rate-scheduler MMW */

#define E1000_RTTBCNRC	0x36B0	/* Tx BCN Rate-Scheduler Config - WO */



/* Split and Replication RX Control - RW */

drivers/net/ethernet/intel/igb/igb_main.c

+5 −0
Original line number Diff line number Diff line
@@ -6997,6 +6997,11 @@ static void igb_set_vf_rate_limit(struct e1000_hw *hw, int vf, int tx_rate, 
	}



	wr32(E1000_RTTDQSEL, vf); /* vf X uses queue X */

	/*

	 * Set global transmit compensation time to the MMW_SIZE in RTTBCNRM

	 * register. MMW_SIZE=0x014 if 9728-byte jumbo is supported.

	 */

	wr32(E1000_RTTBCNRM, 0x14);

	wr32(E1000_RTTBCNRC, bcnrc_val);

}