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ice: Always clear the QRXFLXP_CNTXT register for VF Rx queues 

Currently when the PF reduces its number of channels via ethtool and
then VFs are created there may be stale data for some of the Rx queues
belonging to VFs. This happens when a VF reuses an Rx queue that was
previously used by the PF. Specifically, the QRXFLXP_CNTXT register
will have incorrect values. Fix this by always clearing the relevant
values in the QRXFLXP_CNTXT register for VF queues.

Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Brett Creeley 2020-02-13 13:31:18 -08:00 committed by Jeff Kirsher
parent a6892c96fc
commit 36be2baa09
2 changed files with 7 additions and 2 deletions
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8
drivers/net/ethernet/intel/ice/ice_base.c
View File

@ -386,8 +386,8 @@ int ice_setup_rx_ctx(struct ice_ring *ring)
/* Enable Flexible Descriptors in the queue context which
* allows this driver to select a specific receive descriptor format
*/
regval = rd32(hw, QRXFLXP_CNTXT(pf_q));
if (vsi->type != ICE_VSI_VF) {
regval = rd32(hw, QRXFLXP_CNTXT(pf_q));
regval |= (rxdid << QRXFLXP_CNTXT_RXDID_IDX_S) &
QRXFLXP_CNTXT_RXDID_IDX_M;
@ -398,8 +398,12 @@ int ice_setup_rx_ctx(struct ice_ring *ring)
regval |= (0x03 << QRXFLXP_CNTXT_RXDID_PRIO_S) &
QRXFLXP_CNTXT_RXDID_PRIO_M;
wr32(hw, QRXFLXP_CNTXT(pf_q), regval);
} else {
regval &= ~(QRXFLXP_CNTXT_RXDID_IDX_M |
QRXFLXP_CNTXT_RXDID_PRIO_M |
QRXFLXP_CNTXT_TS_M);
}
wr32(hw, QRXFLXP_CNTXT(pf_q), regval);
/* Absolute queue number out of 2K needs to be passed */
err = ice_write_rxq_ctx(hw, &rlan_ctx, pf_q);

1
drivers/net/ethernet/intel/ice/ice_hw_autogen.h
View File

@ -85,6 +85,7 @@
#define QRXFLXP_CNTXT_RXDID_IDX_M ICE_M(0x3F, 0)
#define QRXFLXP_CNTXT_RXDID_PRIO_S 8
#define QRXFLXP_CNTXT_RXDID_PRIO_M ICE_M(0x7, 8)
#define QRXFLXP_CNTXT_TS_M BIT(11)
#define GLGEN_RSTAT 0x000B8188
#define GLGEN_RSTAT_DEVSTATE_M ICE_M(0x3, 0)
#define GLGEN_RSTCTL 0x000B8180