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authorChristopher Bednarz <christopher.n.bednarz@intel.com>2017-10-16 15:46:03 -0500
committerDoug Ledford <dledford@redhat.com>2017-10-18 13:28:46 -0400
commit56b2f52310f9fdfc1ea7b99702f827f84ad16801 (patch)
treead0caecc68a56fb550b2b6043bc4c367da1313eb
parent1196923838cf1d2b7abcb9a1007eede09ad93acd (diff)
i40iw: Clear CQP Head/Tail during initialization
Clear Control Queue Pair (CQP) Head/Tail on CQP initialization as during an adapter reset, these values are not reinitialized. Tail is cleared by writing 0 to CQP's tail register. Head is cleared by writing 0 to CQP's doorbell register. Fixes: 86dbcd0f12e9 ("i40iw: add file to handle cqp calls") Signed-off-by: Christopher Bednarz <christopher.n.bednarz@intel.com> Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
-rw-r--r--drivers/infiniband/hw/i40iw/i40iw_ctrl.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/i40iw/i40iw_ctrl.c b/drivers/infiniband/hw/i40iw/i40iw_ctrl.c
index 3b6d12176413..e5c8f579e67b 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_ctrl.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_ctrl.c
@@ -483,6 +483,9 @@ static enum i40iw_status_code i40iw_sc_cqp_init(struct i40iw_sc_cqp *cqp,
cqp->dev->cqp_cmd_stats[OP_REQUESTED_COMMANDS] = 0;
cqp->dev->cqp_cmd_stats[OP_COMPLETED_COMMANDS] = 0;
+ i40iw_wr32(cqp->dev->hw, I40E_PFPE_CQPTAIL, 0);
+ i40iw_wr32(cqp->dev->hw, I40E_PFPE_CQPDB, 0);
+
i40iw_debug(cqp->dev, I40IW_DEBUG_WQE,
"%s: sq_size[%04d] hw_sq_size[%04d] sq_base[%p] sq_pa[%llxh] cqp[%p] polarity[x%04X]\n",
__func__, cqp->sq_size, cqp->hw_sq_size,

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