[PATCH net-next 0/2][pull request] 40GbE Intel Wired LAN Driver Updates 2022-07-22

[PATCH net-next 0/2][pull request] 40GbE Intel Wired LAN Driver Updates 2022-07-22

[Tony Nguyen]

This series contains updates to i40e and iavf drivers.

Przemyslaw adds a helper function for determining whether TC MQPRIO is
enabled for i40e.

Avinash utilizes the driver's bookkeeping of filters to check for
duplicate filter before sending the request to the PF for iavf.

The following are changes since commit 949d6b405e6160ae44baea39192d67b39cb7eeac:
  net: add missing includes and forward declarations under net/
and are available in the git repository at:
  git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue 40GbE

Avinash Dayanand (1):
  iavf: Check for duplicate TC flower filter before parsing

Przemyslaw Patynowski (1):
  i40e: Refactor tc mqprio checks

 drivers/net/ethernet/intel/i40e/i40e.h        | 14 +++++
 .../net/ethernet/intel/i40e/i40e_ethtool.c    |  2 +-
 drivers/net/ethernet/intel/i40e/i40e_main.c   | 20 +++----
 drivers/net/ethernet/intel/iavf/iavf_main.c   | 55 +++++++++++--------
 4 files changed, 58 insertions(+), 33 deletions(-)

-- 
2.35.1

[PATCH net-next 1/2] i40e: Refactor tc mqprio checks

[Tony Nguyen]

From: Przemyslaw Patynowski <przemyslawx.patynowski@intel.com>

Refactor bitwise checks for whether TC MQPRIO is enabled
into one single method for improved readability.

Signed-off-by: Przemyslaw Patynowski <przemyslawx.patynowski@intel.com>
Signed-off-by: Jan Sokolowski <jan.sokolowski@intel.com>
Tested-by: Bharathi Sreenivas <bharathi.sreenivas@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e.h        | 14 +++++++++++++
 .../net/ethernet/intel/i40e/i40e_ethtool.c    |  2 +-
 drivers/net/ethernet/intel/i40e/i40e_main.c   | 20 +++++++++----------
 3 files changed, 25 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 97c574a33ba0..d86b6d349ea9 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -1292,4 +1292,18 @@ int i40e_add_del_cloud_filter(struct i40e_vsi *vsi,
 int i40e_add_del_cloud_filter_big_buf(struct i40e_vsi *vsi,
 				      struct i40e_cloud_filter *filter,
 				      bool add);
+
+/**
+ * i40e_is_tc_mqprio_enabled - check if TC MQPRIO is enabled on PF
+ * @pf: pointer to a pf.
+ *
+ * Check and return value of flag I40E_FLAG_TC_MQPRIO.
+ *
+ * Return: I40E_FLAG_TC_MQPRIO set state.
+ **/
+static inline u32 i40e_is_tc_mqprio_enabled(struct i40e_pf *pf)
+{
+	return pf->flags & I40E_FLAG_TC_MQPRIO;
+}
+
 #endif /* _I40E_H_ */
diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
index d9a934ca3eba..156e92c43780 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -5021,7 +5021,7 @@ static int i40e_set_channels(struct net_device *dev,
 	/* We do not support setting channels via ethtool when TCs are
 	 * configured through mqprio
 	 */
-	if (pf->flags & I40E_FLAG_TC_MQPRIO)
+	if (i40e_is_tc_mqprio_enabled(pf))
 		return -EINVAL;
 
 	/* verify they are not requesting separate vectors */
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index fe6f25537110..fb9f476fb33c 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -5456,7 +5456,7 @@ static u8 i40e_pf_get_num_tc(struct i40e_pf *pf)
 	u8 num_tc = 0;
 	struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
 
-	if (pf->flags & I40E_FLAG_TC_MQPRIO)
+	if (i40e_is_tc_mqprio_enabled(pf))
 		return pf->vsi[pf->lan_vsi]->mqprio_qopt.qopt.num_tc;
 
 	/* If neither MQPRIO nor DCB is enabled, then always use single TC */
@@ -5488,7 +5488,7 @@ static u8 i40e_pf_get_num_tc(struct i40e_pf *pf)
  **/
 static u8 i40e_pf_get_tc_map(struct i40e_pf *pf)
 {
-	if (pf->flags & I40E_FLAG_TC_MQPRIO)
+	if (i40e_is_tc_mqprio_enabled(pf))
 		return i40e_mqprio_get_enabled_tc(pf);
 
 	/* If neither MQPRIO nor DCB is enabled for this PF then just return
@@ -5585,7 +5585,7 @@ static int i40e_vsi_configure_bw_alloc(struct i40e_vsi *vsi, u8 enabled_tc,
 	int i;
 
 	/* There is no need to reset BW when mqprio mode is on.  */
-	if (pf->flags & I40E_FLAG_TC_MQPRIO)
+	if (i40e_is_tc_mqprio_enabled(pf))
 		return 0;
 	if (!vsi->mqprio_qopt.qopt.hw && !(pf->flags & I40E_FLAG_DCB_ENABLED)) {
 		ret = i40e_set_bw_limit(vsi, vsi->seid, 0);
@@ -5657,7 +5657,7 @@ static void i40e_vsi_config_netdev_tc(struct i40e_vsi *vsi, u8 enabled_tc)
 					vsi->tc_config.tc_info[i].qoffset);
 	}
 
-	if (pf->flags & I40E_FLAG_TC_MQPRIO)
+	if (i40e_is_tc_mqprio_enabled(pf))
 		return;
 
 	/* Assign UP2TC map for the VSI */
@@ -5818,7 +5818,7 @@ static int i40e_vsi_config_tc(struct i40e_vsi *vsi, u8 enabled_tc)
 	ctxt.vf_num = 0;
 	ctxt.uplink_seid = vsi->uplink_seid;
 	ctxt.info = vsi->info;
-	if (vsi->back->flags & I40E_FLAG_TC_MQPRIO) {
+	if (i40e_is_tc_mqprio_enabled(pf)) {
 		ret = i40e_vsi_setup_queue_map_mqprio(vsi, &ctxt, enabled_tc);
 		if (ret)
 			goto out;
@@ -6542,7 +6542,7 @@ int i40e_create_queue_channel(struct i40e_vsi *vsi,
 		pf->flags |= I40E_FLAG_VEB_MODE_ENABLED;
 
 		if (vsi->type == I40E_VSI_MAIN) {
-			if (pf->flags & I40E_FLAG_TC_MQPRIO)
+			if (i40e_is_tc_mqprio_enabled(pf))
 				i40e_do_reset(pf, I40E_PF_RESET_FLAG, true);
 			else
 				i40e_do_reset_safe(pf, I40E_PF_RESET_FLAG);
@@ -7936,7 +7936,7 @@ static void *i40e_fwd_add(struct net_device *netdev, struct net_device *vdev)
 		netdev_info(netdev, "Macvlans are not supported when DCB is enabled\n");
 		return ERR_PTR(-EINVAL);
 	}
-	if ((pf->flags & I40E_FLAG_TC_MQPRIO)) {
+	if (i40e_is_tc_mqprio_enabled(pf)) {
 		netdev_info(netdev, "Macvlans are not supported when HW TC offload is on\n");
 		return ERR_PTR(-EINVAL);
 	}
@@ -8189,7 +8189,7 @@ static int i40e_setup_tc(struct net_device *netdev, void *type_data)
 	/* Quiesce VSI queues */
 	i40e_quiesce_vsi(vsi);
 
-	if (!hw && !(pf->flags & I40E_FLAG_TC_MQPRIO))
+	if (!hw && !i40e_is_tc_mqprio_enabled(pf))
 		i40e_remove_queue_channels(vsi);
 
 	/* Configure VSI for enabled TCs */
@@ -8213,7 +8213,7 @@ static int i40e_setup_tc(struct net_device *netdev, void *type_data)
 		 "Setup channel (id:%u) utilizing num_queues %d\n",
 		 vsi->seid, vsi->tc_config.tc_info[0].qcount);
 
-	if (pf->flags & I40E_FLAG_TC_MQPRIO) {
+	if (i40e_is_tc_mqprio_enabled(pf)) {
 		if (vsi->mqprio_qopt.max_rate[0]) {
 			u64 max_tx_rate = vsi->mqprio_qopt.max_rate[0];
 
@@ -10867,7 +10867,7 @@ static void i40e_rebuild(struct i40e_pf *pf, bool reinit, bool lock_acquired)
 	 * unless I40E_FLAG_TC_MQPRIO was enabled or DCB
 	 * is not supported with new link speed
 	 */
-	if (pf->flags & I40E_FLAG_TC_MQPRIO) {
+	if (i40e_is_tc_mqprio_enabled(pf)) {
 		i40e_aq_set_dcb_parameters(hw, false, NULL);
 	} else {
 		if (I40E_IS_X710TL_DEVICE(hw->device_id) &&
-- 
2.35.1

[PATCH net-next 2/2] iavf: Check for duplicate TC flower filter before parsing

[Tony Nguyen]

From: Avinash Dayanand <avinash.dayanand@intel.com>

Record of all the TC flower filters are kept for local book keeping, so
take advantage of that and check for duplicate filter even before sending
a request to the PF driver.

Signed-off-by: Avinash Dayanand <avinash.dayanand@intel.com>
Signed-off-by: Jun Zhang <xuejun.zhang@intel.com>
Tested-by: Bharathi Sreenivas <bharathi.sreenivas@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 drivers/net/ethernet/intel/iavf/iavf_main.c | 55 ++++++++++++---------
 1 file changed, 33 insertions(+), 22 deletions(-)

diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c
index 7dddf9800e2f..e78c38d02432 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -3831,6 +3831,29 @@ static int iavf_handle_tclass(struct iavf_adapter *adapter, u32 tc,
 	return 0;
 }
 
+/**
+ * iavf_find_cf - Find the cloud filter in the list
+ * @adapter: Board private structure
+ * @cookie: filter specific cookie
+ *
+ * Returns ptr to the filter object or NULL. Must be called while holding the
+ * cloud_filter_list_lock.
+ */
+static struct iavf_cloud_filter *iavf_find_cf(struct iavf_adapter *adapter,
+					      unsigned long *cookie)
+{
+	struct iavf_cloud_filter *filter = NULL;
+
+	if (!cookie)
+		return NULL;
+
+	list_for_each_entry(filter, &adapter->cloud_filter_list, list) {
+		if (!memcmp(cookie, &filter->cookie, sizeof(filter->cookie)))
+			return filter;
+	}
+	return NULL;
+}
+
 /**
  * iavf_configure_clsflower - Add tc flower filters
  * @adapter: board private structure
@@ -3862,6 +3885,15 @@ static int iavf_configure_clsflower(struct iavf_adapter *adapter,
 
 	filter->cookie = cls_flower->cookie;
 
+	/* bail out here if filter already exists */
+	spin_lock_bh(&adapter->cloud_filter_list_lock);
+	if (iavf_find_cf(adapter, &cls_flower->cookie)) {
+		dev_err(&adapter->pdev->dev, "Failed to add TC Flower filter, it already exists\n");
+		err = -EEXIST;
+		goto spin_unlock;
+	}
+	spin_unlock_bh(&adapter->cloud_filter_list_lock);
+
 	/* set the mask to all zeroes to begin with */
 	memset(&filter->f.mask.tcp_spec, 0, sizeof(struct virtchnl_l4_spec));
 	/* start out with flow type and eth type IPv4 to begin with */
@@ -3880,6 +3912,7 @@ static int iavf_configure_clsflower(struct iavf_adapter *adapter,
 	adapter->num_cloud_filters++;
 	filter->add = true;
 	adapter->aq_required |= IAVF_FLAG_AQ_ADD_CLOUD_FILTER;
+spin_unlock:
 	spin_unlock_bh(&adapter->cloud_filter_list_lock);
 err:
 	if (err)
@@ -3889,28 +3922,6 @@ static int iavf_configure_clsflower(struct iavf_adapter *adapter,
 	return err;
 }
 
-/* iavf_find_cf - Find the cloud filter in the list
- * @adapter: Board private structure
- * @cookie: filter specific cookie
- *
- * Returns ptr to the filter object or NULL. Must be called while holding the
- * cloud_filter_list_lock.
- */
-static struct iavf_cloud_filter *iavf_find_cf(struct iavf_adapter *adapter,
-					      unsigned long *cookie)
-{
-	struct iavf_cloud_filter *filter = NULL;
-
-	if (!cookie)
-		return NULL;
-
-	list_for_each_entry(filter, &adapter->cloud_filter_list, list) {
-		if (!memcmp(cookie, &filter->cookie, sizeof(filter->cookie)))
-			return filter;
-	}
-	return NULL;
-}
-
 /**
  * iavf_delete_clsflower - Remove tc flower filters
  * @adapter: board private structure
-- 
2.35.1

Re: [PATCH net-next 0/2][pull request] 40GbE Intel Wired LAN Driver Updates 2022-07-22

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (master)
by Tony Nguyen <anthony.l.nguyen@intel.com>:

On Fri, 22 Jul 2022 10:53:11 -0700 you wrote:
> This series contains updates to i40e and iavf drivers.
> 
> Przemyslaw adds a helper function for determining whether TC MQPRIO is
> enabled for i40e.
> 
> Avinash utilizes the driver's bookkeeping of filters to check for
> duplicate filter before sending the request to the PF for iavf.
> 
> [...]

Here is the summary with links:
  - [net-next,1/2] i40e: Refactor tc mqprio checks
    https://git.kernel.org/netdev/net-next/c/2313e69c84c0
  - [net-next,2/2] iavf: Check for duplicate TC flower filter before parsing
    https://git.kernel.org/netdev/net-next/c/40e589ba133c

You are awesome, thank you!
-- 
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