From: Brett Creeley <brett.creeley@intel.com>
Date: Fri, 26 Feb 2021 13:19:21 -0800
Subject: ice: Fix VFR issues for AVF drivers that expect ATQLEN cleared
Patch-mainline: v5.13-rc5
Git-commit: 8679f07a9922068b9b6be81b632f52cac45d1b91
References: git-fixes
Some AVF drivers expect the VF_MBX_ATQLEN register to be cleared for any
type of VFR/VFLR. Fix this by clearing the VF_MBX_ATQLEN register at the
same time as VF_MBX_ARQLEN.
Fixes: 82ba01282cf8 ("ice: clear VF ARQLEN register on reset")
Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/intel/ice/ice_hw_autogen.h | 1 +
drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c | 12 +++++++-----
2 files changed, 8 insertions(+), 5 deletions(-)
--- a/drivers/net/ethernet/intel/ice/ice_hw_autogen.h
+++ b/drivers/net/ethernet/intel/ice/ice_hw_autogen.h
@@ -34,6 +34,7 @@
#define PF_FW_ATQLEN_ATQOVFL_M BIT(29)
#define PF_FW_ATQLEN_ATQCRIT_M BIT(30)
#define VF_MBX_ARQLEN(_VF) (0x0022BC00 + ((_VF) * 4))
+#define VF_MBX_ATQLEN(_VF) (0x0022A800 + ((_VF) * 4))
#define PF_FW_ATQLEN_ATQENABLE_M BIT(31)
#define PF_FW_ATQT 0x00080400
#define PF_MBX_ARQBAH 0x0022E400
--- a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
@@ -370,13 +370,15 @@ static void ice_trigger_vf_reset(struct
*/
clear_bit(ICE_VF_STATE_INIT, vf->vf_states);
- /* VF_MBX_ARQLEN is cleared by PFR, so the driver needs to clear it
- * in the case of VFR. If this is done for PFR, it can mess up VF
- * resets because the VF driver may already have started cleanup
- * by the time we get here.
+ /* VF_MBX_ARQLEN and VF_MBX_ATQLEN are cleared by PFR, so the driver
+ * needs to clear them in the case of VFR/VFLR. If this is done for
+ * PFR, it can mess up VF resets because the VF driver may already
+ * have started cleanup by the time we get here.
*/
- if (!is_pfr)
+ if (!is_pfr) {
wr32(hw, VF_MBX_ARQLEN(vf->vf_id), 0);
+ wr32(hw, VF_MBX_ATQLEN(vf->vf_id), 0);
+ }
/* In the case of a VFLR, the HW has already reset the VF and we
* just need to clean up, so don't hit the VFRTRIG register.