From: Qi Zhang <qi.z.zhang@intel.com>
Date: Wed, 8 Mar 2017 06:18:56 +0000 (-0500)
Subject: net/fm10k/base: use different name for override bit
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=99cb088c1ee453df184b57b0ef978c48466c5c63;p=dpdk.git

net/fm10k/base: use different name for override bit

Use a new #define FM10K_VLAN_OVERRIDE even though we're using
the exact same bit. The reason for this is clarity in the code,
otherwise you can read FM10K_VLAN_CLEAR and think it should be
removed. Also add a comment explaining why the FM10K_VLAN_OVERRIDE
bit is set.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
---

diff --git a/drivers/net/fm10k/base/fm10k_pf.c b/drivers/net/fm10k/base/fm10k_pf.c
index 856cb8abb7..878d46edf2 100644
--- a/drivers/net/fm10k/base/fm10k_pf.c
+++ b/drivers/net/fm10k/base/fm10k_pf.c
@@ -912,13 +912,13 @@ STATIC s32 fm10k_iov_assign_default_mac_vlan_pf(struct fm10k_hw *hw,
 	vf_q_idx = fm10k_vf_queue_index(hw, vf_idx);
 	qmap_idx = qmap_stride * vf_idx;
 
-	/* MAP Tx queue back to 0 temporarily, and disable it */
-	FM10K_WRITE_REG(hw, FM10K_TQMAP(qmap_idx), 0);
-	FM10K_WRITE_REG(hw, FM10K_TXDCTL(vf_q_idx), 0);
-
-	/* determine correct default VLAN ID */
+	/* Determine correct default VLAN ID. The FM10K_VLAN_OVERRIDE bit is
+	 * used here to indicate to the VF that it will not have privilege to
+	 * write VLAN_TABLE. All policy is enforced on the PF but this allows
+	 * the VF to correctly report errors to userspace rqeuests.
+	 */
 	if (vf_info->pf_vid)
-		vf_vid = vf_info->pf_vid | FM10K_VLAN_CLEAR;
+		vf_vid = vf_info->pf_vid | FM10K_VLAN_OVERRIDE;
 	else
 		vf_vid = vf_info->sw_vid;
 
diff --git a/drivers/net/fm10k/base/fm10k_type.h b/drivers/net/fm10k/base/fm10k_type.h
index 2ae77ad5e3..eedfe7408b 100644
--- a/drivers/net/fm10k/base/fm10k_type.h
+++ b/drivers/net/fm10k/base/fm10k_type.h
@@ -393,6 +393,7 @@ struct fm10k_hw;
 #define FM10K_VLAN_TABLE_VSI_MAX		64
 #define FM10K_VLAN_LENGTH_SHIFT			16
 #define FM10K_VLAN_CLEAR			BIT(15)
+#define FM10K_VLAN_OVERRIDE			FM10K_VLAN_CLEAR
 #define FM10K_VLAN_ALL \
 	((FM10K_VLAN_TABLE_VID_MAX - 1) << FM10K_VLAN_LENGTH_SHIFT)
 
diff --git a/drivers/net/fm10k/base/fm10k_vf.c b/drivers/net/fm10k/base/fm10k_vf.c
index efbdbd1e73..533dfeb9a9 100644
--- a/drivers/net/fm10k/base/fm10k_vf.c
+++ b/drivers/net/fm10k/base/fm10k_vf.c
@@ -268,7 +268,7 @@ s32 fm10k_msg_mac_vlan_vf(struct fm10k_hw *hw, u32 **results,
 
 	memcpy(hw->mac.perm_addr, perm_addr, ETH_ALEN);
 	hw->mac.default_vid = vid & (FM10K_VLAN_TABLE_VID_MAX - 1);
-	hw->mac.vlan_override = !!(vid & FM10K_VLAN_CLEAR);
+	hw->mac.vlan_override = !!(vid & FM10K_VLAN_OVERRIDE);
 
 	return FM10K_SUCCESS;
 }