[dpdk-dev] [PATCH 11/16] fm10k: Re-map all possible VF queues after a VFLR

[Wang Xiao W <xiao.w.wang@intel.com>]

During initialization, the VF counts its rings by walking the TQDLOC
registers. This only works if the TQMAP/RQMAP registers are set to map
the out-of-bound rings to the first one, so the VF driver can detect when
it has run out of queues cleanly. Update the PF to reset the empty
TQMAP/RQMAP registers post-VFLR to prevent innocent VF drivers from
triggering malicious events.

Signed-off-by: Wang Xiao W <xiao.w.wang@intel.com>
---
 drivers/net/fm10k/base/fm10k_pf.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/fm10k/base/fm10k_pf.c b/drivers/net/fm10k/base/fm10k_pf.c
index 1004018..eb1adc9 100644
--- a/drivers/net/fm10k/base/fm10k_pf.c
+++ b/drivers/net/fm10k/base/fm10k_pf.c
@@ -1102,6 +1102,12 @@ STATIC s32 fm10k_iov_reset_resources_pf(struct fm10k_hw *hw,
 		FM10K_WRITE_REG(hw, FM10K_RQMAP(qmap_idx + i), vf_q_idx + i);
 	}
 
+	/* repeat the first ring for all of the remaining VF rings */
+	for (i = queues_per_pool; i < qmap_stride; i++) {
+		FM10K_WRITE_REG(hw, FM10K_TQMAP(qmap_idx + i), vf_q_idx);
+		FM10K_WRITE_REG(hw, FM10K_RQMAP(qmap_idx + i), vf_q_idx);
+	}
+
 	return FM10K_SUCCESS;
 }
 
-- 
1.9.3