netdev - [PATCH net] i40e/iavf: Fix msg interface between VF and PF

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Date:   Mon, 4 Nov 2019 05:32:25 +0000
From:   Arkady Gilinsky <arkady.gilinsky@...monicinc.com>
To:     "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "jeffrey.t.kirsher@...el.com" <jeffrey.t.kirsher@...el.com>
CC:     Arkady Gilinsky <arcadyg@...il.com>
Subject: [PATCH net] i40e/iavf: Fix msg interface between VF and PF

>From af5ab2aaa51882bb7111b026882fe217ed81c15b Mon Sep 17 00:00:00 2001
From: Arkady Gilinsky <arkady.gilinsky@...monicinc
.com>
Date: Sun, 3 Nov 2019 20:37:21 +0200
Subject: [PATCH net] i40e/iavf: Fix msg interface between VF and PF

 * The original issue was that iavf driver passing TX/RX queues
   as bitmap in iavf_disable_queues and the i40e driver
   interprets this message as an absolute number in
   i40e_vc_disable_queues_msg, so the validation in the
   latter function always fail.
   This commit reorganize the msg interface between i40e and iavf
   between the iavf_disable_queues and i40e_vc_disable_queues_msg
   functions (also for iavf_enable_queues and i40e_vc_enable_queues_msg).
   Now both drivers operate with number of queues instead of
   bitmap. Also the commit introduces range check in
   i40e_vc_enable_queues_msg function.

Signed-off-by: Arkady Gilinsky <arkady.gilinsky@...monicinc.com>
---
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 23 ++++++++++++++++------
 drivers/net/ethernet/intel/iavf/iavf_virtchnl.c    |  6 ++++--
 2 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 3d2440838822..c650eb91982a 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -2352,13 +2352,22 @@ static int i40e_vc_enable_queues_msg(struct i40e_vf *vf, u8 *msg)
 		goto error_param;
 	}
 
-	/* Use the queue bit map sent by the VF */
-	if (i40e_ctrl_vf_rx_rings(pf->vsi[vf->lan_vsi_idx], vqs->rx_queues,
+	if ((vqs->rx_queues == 0 && vqs->tx_queues == 0) ||
+	    vqs->rx_queues > I40E_MAX_VF_QUEUES ||
+	    vqs->tx_queues > I40E_MAX_VF_QUEUES) {
+		aq_ret = I40E_ERR_PARAM;
+		goto error_param;
+	}
+
+	/* Build the queue bit map from value sent by the VF */
+	if (i40e_ctrl_vf_rx_rings(pf->vsi[vf->lan_vsi_idx],
+				  BIT(vqs->rx_queues) - 1,
 				  true)) {
 		aq_ret = I40E_ERR_TIMEOUT;
 		goto error_param;
 	}
-	if (i40e_ctrl_vf_tx_rings(pf->vsi[vf->lan_vsi_idx], vqs->tx_queues,
+	if (i40e_ctrl_vf_tx_rings(pf->vsi[vf->lan_vsi_idx],
+				  BIT(vqs->tx_queues) - 1,
 				  true)) {
 		aq_ret = I40E_ERR_TIMEOUT;
 		goto error_param;
@@ -2416,13 +2425,15 @@ static int i40e_vc_disable_queues_msg(struct i40e_vf *vf, u8 *msg)
 		goto error_param;
 	}
 
-	/* Use the queue bit map sent by the VF */
-	if (i40e_ctrl_vf_tx_rings(pf->vsi[vf->lan_vsi_idx], vqs->tx_queues,
+	/* Build the queue bit map from value sent by the VF */
+	if (i40e_ctrl_vf_tx_rings(pf->vsi[vf->lan_vsi_idx],
+				  BIT(vqs->tx_queues) - 1,
 				  false)) {
 		aq_ret = I40E_ERR_TIMEOUT;
 		goto error_param;
 	}
-	if (i40e_ctrl_vf_rx_rings(pf->vsi[vf->lan_vsi_idx], vqs->rx_queues,
+	if (i40e_ctrl_vf_rx_rings(pf->vsi[vf->lan_vsi_idx],
+				  BIT(vqs->rx_queues) - 1,
 				  false)) {
 		aq_ret = I40E_ERR_TIMEOUT;
 		goto error_param;
diff --git a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
index c46770eba320..271f144bf05b 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
@@ -308,7 +308,8 @@ void iavf_enable_queues(struct iavf_adapter *adapter)
 	}
 	adapter->current_op = VIRTCHNL_OP_ENABLE_QUEUES;
 	vqs.vsi_id = adapter->vsi_res->vsi_id;
-	vqs.tx_queues = BIT(adapter->num_active_queues) - 1;
+	/* Send the queues number to PF */
+	vqs.tx_queues = adapter->num_active_queues;
 	vqs.rx_queues = vqs.tx_queues;
 	adapter->aq_required &= ~IAVF_FLAG_AQ_ENABLE_QUEUES;
 	iavf_send_pf_msg(adapter, VIRTCHNL_OP_ENABLE_QUEUES,
@@ -333,7 +334,8 @@ void iavf_disable_queues(struct iavf_adapter *adapter)
 	}
 	adapter->current_op = VIRTCHNL_OP_DISABLE_QUEUES;
 	vqs.vsi_id = adapter->vsi_res->vsi_id;
-	vqs.tx_queues = BIT(adapter->num_active_queues) - 1;
+	/* Send the queues number to PF */
+	vqs.tx_queues = adapter->num_active_queues;
 	vqs.rx_queues = vqs.tx_queues;
 	adapter->aq_required &= ~IAVF_FLAG_AQ_DISABLE_QUEUES;
 	iavf_send_pf_msg(adapter, VIRTCHNL_OP_DISABLE_QUEUES,
-- 
2.11.0