Re: dev Digest, Vol 132, Issue 84

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 55fd344..5155b25 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c

@@ -110,6 +110,7 @@ static int i40evf_dev_link_update(struct rte_eth_dev *dev,
 				  __rte_unused int wait_to_complete);  static void i40evf_dev_stats_get(struct rte_eth_dev *dev,
 				struct rte_eth_stats *stats);
+static void i40evf_dev_stats_reset(struct rte_eth_dev *dev);
 static int i40evf_dev_xstats_get(struct rte_eth_dev *dev,
 				 struct rte_eth_xstat *xstats, unsigned n);  static int i40evf_dev_xstats_get_names(struct rte_eth_dev *dev, @@ -199,6 +200,7 @@ static const struct eth_dev_ops i40evf_eth_dev_ops = {
 	.allmulticast_disable = i40evf_dev_allmulticast_disable,
 	.link_update          = i40evf_dev_link_update,
 	.stats_get            = i40evf_dev_stats_get,
+	.stats_reset          = i40evf_dev_stats_reset,
 	.xstats_get           = i40evf_dev_xstats_get,
 	.xstats_get_names     = i40evf_dev_xstats_get_names,
 	.xstats_reset         = i40evf_dev_xstats_reset,

@@ -988,6 +990,27 @@ i40evf_get_statistics(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 	return 0;
 }
 
+static int
+i40evf_reset_statistics(struct rte_eth_dev *dev) {
+	struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
+	int err;
+	struct vf_cmd_info args;
+	u16 vsi_id = vf->vsi_res->vsi_id;
+
+	args.ops = (enum i40e_virtchnl_ops)I40E_VIRTCHNL_OP_RESET_STATS;
+	args.in_args = (uint8_t *)&vsi_id;
+	args.in_args_size = sizeof(vsi_id);
+	args.out_buffer = vf->aq_resp;
+	args.out_size = I40E_AQ_BUF_SZ;
+
+	err = i40evf_execute_vf_cmd(dev, &args);
+	if (err)
+		PMD_DRV_LOG(ERR, "fail to execute command CFG_VLAN_OFFLOAD");
+
+	return err;
+}
+
 static void
 i40evf_dev_xstats_reset(struct rte_eth_dev *dev)  { @@ -2310,6 +2333,17 @@ i40evf_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)  }
 
 static void
+i40evf_dev_stats_reset(struct rte_eth_dev *dev) {
+	struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
+	/* only DPDK PF support this */
+	if (vf->version_major == I40E_DPDK_VERSION_MAJOR) {
+		if (i40evf_reset_statistics(dev))
+			PMD_DRV_LOG(ERR, "Reset statistics failed");
+	}
+}
+
+static void
 i40evf_dev_close(struct rte_eth_dev *dev)  {
 	struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);

diff --git a/drivers/net/i40e/i40e_pf.c b/drivers/net/i40e/i40e_pf.c index f771dfb..62d2bfd 100644
--- a/drivers/net/i40e/i40e_pf.c
+++ b/drivers/net/i40e/i40e_pf.c

@@ -1155,6 +1155,27 @@ i40e_pf_host_process_cmd_cfg_pvid(struct i40e_pf_vf *vf,
 	return ret;
 }
 
+static int
+i40e_pf_host_process_cmd_reset_stats(struct i40e_pf_vf *vf,
+					bool b_op)
+{
+	vf->vsi->offset_loaded = false;
+	i40e_update_vsi_stats(vf->vsi);
+
+	if (b_op)
+		i40e_pf_host_send_msg_to_vf(vf, I40E_VIRTCHNL_OP_RESET_STATS,
+					    I40E_SUCCESS,
+					    NULL,
+					    0);
+	else
+		i40e_pf_host_send_msg_to_vf(vf, I40E_VIRTCHNL_OP_RESET_STATS,
+					    I40E_NOT_SUPPORTED,
+					    NULL,
+					    0);
+
+	return I40E_SUCCESS;
+}
+
 void
 i40e_notify_vf_link_status(struct rte_eth_dev *dev, struct i40e_pf_vf *vf)  { @@ -1300,6 +1321,10 @@ i40e_pf_host_handle_vf_msg(struct rte_eth_dev *dev,
 		PMD_DRV_LOG(INFO, "OP_CFG_VLAN_PVID received");
 		i40e_pf_host_process_cmd_cfg_pvid(vf, msg, msglen, b_op);
 		break;
+	case I40E_VIRTCHNL_OP_RESET_STATS:
+		PMD_DRV_LOG(INFO, "OP_RESET_STATS received");
+		i40e_pf_host_process_cmd_reset_stats(vf, b_op);
+		break;
 	/* Don't add command supported below, which will
 	 * return an error code.
 	 */

diff --git a/drivers/net/i40e/i40e_pf.h b/drivers/net/i40e/i40e_pf.h index b4c2287..69ef873 100644
--- a/drivers/net/i40e/i40e_pf.h
+++ b/drivers/net/i40e/i40e_pf.h

@@ -58,6 +58,7 @@ enum i40e_virtchnl_ops_dpdk {
 						I40E_DPDK_OFFSET,
 	I40E_VIRTCHNL_OP_CFG_VLAN_PVID,
 	I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES_EXT,
+	I40E_VIRTCHNL_OP_RESET_STATS,
 };
 
 /* A structure to support extended info of a receive queue. */
--

diff --git a/doc/guides/rel_notes/release_17_05.rst b/doc/guides/rel_notes/release_17_05.rst
index e25ea9f..f41a839 100644
--- a/doc/guides/rel_notes/release_17_05.rst
+++ b/doc/guides/rel_notes/release_17_05.rst

@@ -41,6 +41,9 @@ New Features
      Also, make sure to start the actual text at the margin.
      =========================================================
 
+* **Added VF max bandwidth setting on i40e.**
+
+  i40e HW supports to set the max bandwidth for a VF. Enable this capability.
 
 Resolved Issues
 ---------------

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 508fcc8..cb8f1a4 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c

@@ -243,6 +243,11 @@
 /* Bit mask of Extended Tag enable/disable */
 #define PCI_DEV_CTRL_EXT_TAG_MASK  (1 << PCI_DEV_CTRL_EXT_TAG_SHIFT)
 
+/* The max bandwidth of i40e is 40Gbps. */
+#define I40E_QOS_BW_MAX 40000
+/* The bandwidth should be the multiple of 50Mbps. */
+#define I40E_QOS_BW_GRANULARITY 50
+
 static int eth_i40e_dev_init(struct rte_eth_dev *eth_dev);
 static int eth_i40e_dev_uninit(struct rte_eth_dev *eth_dev);
 static int i40e_dev_configure(struct rte_eth_dev *dev);

@@ -11219,3 +11224,92 @@ int rte_pmd_i40e_set_vf_vlan_filter(uint8_t port, uint16_t vlan_id,
 
 	return 0;
 }
+
+int
+rte_pmd_i40e_set_vf_max_bw(uint8_t port, uint16_t vf_id, uint32_t bw)
+{
+	struct rte_eth_dev *dev;
+	struct i40e_pf *pf;
+	struct i40e_vsi *vsi;
+	struct i40e_hw *hw;
+	int ret = 0;
+	int i;
+
+	RTE_ETH_VALID_PORTID_OR_ERR_RET(port, -ENODEV);
+
+	dev = &rte_eth_devices[port];
+
+	if (!is_device_supported(dev, &rte_i40e_pmd))
+		return -ENOTSUP;
+
+	pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
+
+	if (vf_id >= pf->vf_num || !pf->vfs) {
+		PMD_DRV_LOG(ERR, "Invalid VF ID.");
+		return -EINVAL;
+	}
+
+	vsi = pf->vfs[vf_id].vsi;
+	if (!vsi) {
+		PMD_DRV_LOG(ERR, "Invalid VSI.");
+		return -EINVAL;
+	}
+
+	if (bw > I40E_QOS_BW_MAX) {
+		PMD_DRV_LOG(ERR, "Bandwidth should not be larger than %dMbps.",
+			    I40E_QOS_BW_MAX);
+		return -EINVAL;
+	}
+
+	if (bw % I40E_QOS_BW_GRANULARITY) {
+		PMD_DRV_LOG(ERR, "Bandwidth should be the multiple of %dMbps.",
+			    I40E_QOS_BW_GRANULARITY);
+		return -EINVAL;
+	}
+
+	bw /= I40E_QOS_BW_GRANULARITY;
+
+	hw = I40E_VSI_TO_HW(vsi);
+
+	/* No change. */
+	if (bw == vsi->bw_info.bw_limit) {
+		PMD_DRV_LOG(INFO,
+			    "No change for VF max bandwidth. Nothing to do.");
+		return 0;
+	}
+
+	/**
+	 * VF bandwidth limitation and TC bandwidth limitation cannot be
+	 * enabled in parallel, quit if TC bandwidth limitation is enabled.
+	 *
+	 * If bw is 0, means disable bandwidth limitation. Then no need to
+	 * check TC bandwidth limitation.
+	 */
+	if (bw) {
+		for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
+			if ((vsi->enabled_tc & BIT_ULL(i)) &&
+			    vsi->bw_info.bw_ets_credits[i])
+				break;
+		}
+		if (i != I40E_MAX_TRAFFIC_CLASS) {
+			PMD_DRV_LOG(ERR,
+				    "TC max bandwidth has been set on this VF,"
+				    " please disable it first.");
+			return -EINVAL;
+		}
+	}
+
+	ret = i40e_aq_config_vsi_bw_limit(hw, vsi->seid, (uint16_t)bw, 0, NULL);
+	if (ret) {
+		PMD_DRV_LOG(ERR,
+			    "Failed to set VF %d bandwidth, err(%d).",
+			    vf_id, ret);
+		return -EINVAL;
+	}
+
+	/* Store the configuration. */
+	vsi->bw_info.bw_limit = (uint16_t)bw;
+	vsi->bw_info.bw_max = 0;
+
+	return 0;
+}

diff --git a/drivers/net/i40e/rte_pmd_i40e.h b/drivers/net/i40e/rte_pmd_i40e.h
index a0ad88c..224ec4f 100644
--- a/drivers/net/i40e/rte_pmd_i40e.h
+++ b/drivers/net/i40e/rte_pmd_i40e.h

@@ -332,4 +332,27 @@ int rte_pmd_i40e_get_vf_stats(uint8_t port,
 int rte_pmd_i40e_reset_vf_stats(uint8_t port,
 				uint16_t vf_id);
 
+/**
+ * Set VF's max bandwidth.
+ *
+ * Per VF bandwidth limitation and per TC bandwidth limitation cannot
+ * be enabled in parallel. If per TC bandwidth is enabled, this function
+ * will disable it.
+ *
+ * @param port
+ *    The port identifier of the Ethernet device.
+ * @param vf_id
+ *    ID specifying VF.
+ * @param bw
+ *    Bandwidth for this VF.
+ * @return
+ *   - (0) if successful.
+ *   - (-ENODEV) if *port* invalid.
+ *   - (-EINVAL) if bad parameter.
+ *   - (-ENOTSUP) not supported by firmware.
+ */
+int rte_pmd_i40e_set_vf_max_bw(uint8_t port,
+			       uint16_t vf_id,
+			       uint32_t bw);
+
 #endif /* _PMD_I40E_H_ */

diff --git a/drivers/net/i40e/rte_pmd_i40e_version.map b/drivers/net/i40e/rte_pmd_i40e_version.map
index 7a5d211..1d9dcf8 100644
--- a/drivers/net/i40e/rte_pmd_i40e_version.map
+++ b/drivers/net/i40e/rte_pmd_i40e_version.map

@@ -22,3 +22,10 @@ DPDK_17.02 {
 	rte_pmd_i40e_set_vf_vlan_tag;
 
 } DPDK_2.0;
+
+DPDK_17.05 {
+	global:
+
+	rte_pmd_i40e_set_vf_max_bw;
+
+} DPDK_17.02;

-- 
1.9.3



------------------------------

Message: 5
Date: Fri, 24 Feb 2017 11:24:29 +0800
From: Wenzhuo Lu <wenzhuo.lu@intel.com>
To: dev@dpdk.org
Cc: Wenzhuo Lu <wenzhuo.lu@intel.com>
Subject: [dpdk-dev] [PATCH 2/8] net/i40e: allocate VF TC bandwidth
	from PF
Message-ID: <1487906675-54260-3-git-send-email-wenzhuo.lu@intel.com>

Allocate all TCs' relative bandwidth (percentage) on
a specific VF.
It can be taken as relative min bandwidth setting.
User can call the API to set VF TC's min bandwidth
from PF.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
 doc/guides/rel_notes/release_17_05.rst    |   5 ++
 drivers/net/i40e/i40e_ethdev.c            | 118 ++++++++++++++++++++++++++++++
 drivers/net/i40e/rte_pmd_i40e.h           |  26 +++++++
 drivers/net/i40e/rte_pmd_i40e_version.map |   1 +
 4 files changed, 150 insertions(+)

diff --git a/doc/guides/rel_notes/release_17_05.rst b/doc/guides/rel_notes/release_17_05.rst
index f41a839..a726138 100644
--- a/doc/guides/rel_notes/release_17_05.rst
+++ b/doc/guides/rel_notes/release_17_05.rst
@@ -45,6 +45,11 @@ New Features
 
   i40e HW supports to set the max bandwidth for a VF. Enable this capability.
 
+* **Added VF TC min bandwidth setting on i40e.**
+
+  i40e HW supports to set the allocated bandwidth for a TC on a VF. Enable this
+  capability.
+
 Resolved Issues
 ---------------
 
diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index cb8f1a4..5a46737 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -247,6 +247,10 @@
 #define I40E_QOS_BW_MAX 40000
 /* The bandwidth should be the multiple of 50Mbps. */
 #define I40E_QOS_BW_GRANULARITY 50
+/* The min bandwidth weight is 1. */
+#define I40E_QOS_BW_WEIGHT_MIN 1
+/* The max bandwidth weight is 127. */
+#define I40E_QOS_BW_WEIGHT_MAX 127
 
 static int eth_i40e_dev_init(struct rte_eth_dev *eth_dev);
 static int eth_i40e_dev_uninit(struct rte_eth_dev *eth_dev);
@@ -11313,3 +11317,117 @@ int rte_pmd_i40e_set_vf_vlan_filter(uint8_t port, uint16_t vlan_id,
 
 	return 0;
 }
+
+int
+rte_pmd_i40e_set_vf_tc_bw_alloc(uint8_t port, uint16_t vf_id,
+				uint8_t tc_num, uint8_t *bw_weight)
+{
+	struct rte_eth_dev *dev;
+	struct i40e_pf *pf;
+	struct i40e_vsi *vsi;
+	struct i40e_hw *hw;
+	struct i40e_aqc_configure_vsi_tc_bw_data tc_bw;
+	int ret = 0;
+	int i, j;
+	uint16_t sum;
+	bool b_change = false;
+
+	RTE_ETH_VALID_PORTID_OR_ERR_RET(port, -ENODEV);
+
+	dev = &rte_eth_devices[port];
+
+	if (!is_device_supported(dev, &rte_i40e_pmd))
+		return -ENOTSUP;
+
+	pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
+
+	if (vf_id >= pf->vf_num || !pf->vfs) {
+		PMD_DRV_LOG(ERR, "Invalid VF ID.");
+		return -EINVAL;
+	}
+
+	vsi = pf->vfs[vf_id].vsi;
+	if (!vsi) {
+		PMD_DRV_LOG(ERR, "Invalid VSI.");
+		return -EINVAL;
+	}
+
+	if (tc_num > I40E_MAX_TRAFFIC_CLASS) {
+		PMD_DRV_LOG(ERR, "TCs should be no more than %d.",
+			    I40E_MAX_TRAFFIC_CLASS);
+		return -EINVAL;
+	}
+
+	sum = 0;
+	for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
+		if (vsi->enabled_tc & BIT_ULL(i))
+			sum++;
+	}
+	if (sum != tc_num) {
+		PMD_DRV_LOG(ERR,
+			    "Weight should be set for all %d enabled TCs.",
+			    sum);
+		return -EINVAL;
+	}
+
+	sum = 0;
+	for (i = 0; i < tc_num; i++) {
+		if (!bw_weight[i]) {
+			PMD_DRV_LOG(ERR,
+				    "The weight should be 1 at least.");
+			return -EINVAL;
+		}
+		sum += bw_weight[i];
+	}
+	if (sum != 100) {
+		PMD_DRV_LOG(ERR,
+			    "The summary of the TC weight should be 100.");
+		return -EINVAL;
+	}
+
+	/**
+	 * Create the configuration for all the TCs.
+	 */
+	memset(&tc_bw, 0, sizeof(tc_bw));
+	tc_bw.tc_valid_bits = vsi->enabled_tc;
+	j = 0;
+	for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
+		if (vsi->enabled_tc & BIT_ULL(i)) {
+			if (bw_weight[j] !=
+				vsi->bw_info.bw_ets_share_credits[i])
+				b_change = true;
+
+			tc_bw.tc_bw_credits[i] = bw_weight[j];
+			j++;
+		}
+	}
+
+	/* No change. */
+	if (!b_change) {
+		PMD_DRV_LOG(INFO,
+			    "No change for TC allocated bandwidth."
+			    " Nothing to do.");
+		return 0;
+	}
+
+	hw = I40E_VSI_TO_HW(vsi);
+
+	ret = i40e_aq_config_vsi_tc_bw(hw, vsi->seid, &tc_bw, NULL);
+	if (ret) {
+		PMD_DRV_LOG(ERR,
+			    "Failed to set VF %d TC bandwidth weight, err(%d).",
+			    vf_id, ret);
+		return -EINVAL;
+	}
+
+	/* Store the configuration. */
+	j = 0;
+	for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
+		if (vsi->enabled_tc & BIT_ULL(i)) {
+			vsi->bw_info.bw_ets_share_credits[i] = bw_weight[j];
+			j++;
+		}
+	}
+
+	return 0;
+}
diff --git a/drivers/net/i40e/rte_pmd_i40e.h b/drivers/net/i40e/rte_pmd_i40e.h
index 224ec4f..9fdb447 100644
--- a/drivers/net/i40e/rte_pmd_i40e.h
+++ b/drivers/net/i40e/rte_pmd_i40e.h
@@ -355,4 +355,30 @@ int rte_pmd_i40e_set_vf_max_bw(uint8_t port,
 			       uint16_t vf_id,
 			       uint32_t bw);
 
+/**
+ * Set all the TCs' bandwidth weight on a specific VF.
+ *
+ * The bw_weight means the percentage occupied by the TC.
+ * It can be taken as the relative min bandwidth setting.
+ *
+ * @param port
+ *    The port identifier of the Ethernet device.
+ * @param vf_id
+ *    ID specifying VF.
+ * @param tc_num
+ *    Number of TCs.
+ * @param bw_weight
+ *    An array of relative bandwidth weight for all the TCs.
+ *    The summary of the bw_weight should be 100.
+ * @return
+ *   - (0) if successful.
+ *   - (-ENODEV) if *port* invalid.
+ *   - (-EINVAL) if bad parameter.
+ *   - (-ENOTSUP) not supported by firmware.
+ */
+int rte_pmd_i40e_set_vf_tc_bw_alloc(uint8_t port,
+				    uint16_t vf_id,
+				    uint8_t tc_num,
+				    uint8_t *bw_weight);
+
 #endif /* _PMD_I40E_H_ */
diff --git a/drivers/net/i40e/rte_pmd_i40e_version.map b/drivers/net/i40e/rte_pmd_i40e_version.map
index 1d9dcf8..85bc41d 100644
--- a/drivers/net/i40e/rte_pmd_i40e_version.map
+++ b/drivers/net/i40e/rte_pmd_i40e_version.map
@@ -27,5 +27,6 @@ DPDK_17.05 {
 	global:
 
 	rte_pmd_i40e_set_vf_max_bw;
+	rte_pmd_i40e_set_vf_tc_bw_alloc;
 
 } DPDK_17.02;
-- 
1.9.3



------------------------------

Message: 6
Date: Fri, 24 Feb 2017 11:24:30 +0800
From: Wenzhuo Lu <wenzhuo.lu@intel.com>
To: dev@dpdk.org
Cc: Wenzhuo Lu <wenzhuo.lu@intel.com>
Subject: [dpdk-dev] [PATCH 3/8] net/i40e: set VF TC max bandwidth from
	PF
Message-ID: <1487906675-54260-4-git-send-email-wenzhuo.lu@intel.com>

Set a specific TC's max bandwidth on a VF.
User can call the API to set VF TC's max bandwidth
from PF.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
 doc/guides/nics/i40e.rst                  |  11 +++
 doc/guides/rel_notes/release_17_05.rst    |   5 ++
 drivers/net/i40e/i40e_ethdev.c            | 118 ++++++++++++++++++++++++++++++
 drivers/net/i40e/rte_pmd_i40e.h           |  22 ++++++
 drivers/net/i40e/rte_pmd_i40e_version.map |   1 +
 5 files changed, 157 insertions(+)

diff --git a/doc/guides/nics/i40e.rst b/doc/guides/nics/i40e.rst
index b890613..260287e 100644
--- a/doc/guides/nics/i40e.rst
+++ b/doc/guides/nics/i40e.rst
@@ -467,3 +467,14 @@ Incorrect Rx statistics when packet is oversize
 When a packet is over maximum frame size, the packet is dropped.
 However the Rx statistics, when calling `rte_eth_stats_get` incorrectly
 shows it as received.
+
+VF & TC max bandwidth setting
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The per VF max bandwidth and per TC max bandwidth cannot be enabled in parallel.
+The dehavior is different when handling per VF and per TC max bandwidth setting.
+When enabling per VF max bandwidth, SW will check if per TC max bandwidth is
+enabled. If so, return failure.
+When enabling per TC max bandwidth, SW will check if per VF max bandwidth
+is enabled. If so, disable per VF max bandwidth and continue with per TC max
+bandwidth setting.
diff --git a/doc/guides/rel_notes/release_17_05.rst b/doc/guides/rel_notes/release_17_05.rst
index a726138..d31435c 100644
--- a/doc/guides/rel_notes/release_17_05.rst
+++ b/doc/guides/rel_notes/release_17_05.rst
@@ -50,6 +50,11 @@ New Features
   i40e HW supports to set the allocated bandwidth for a TC on a VF. Enable this
   capability.
 
+* **Added VF TC max bandwidth setting on i40e.**
+
+  i40e HW supports to set the max bandwidth for a TC on a VF. Enable this
+  capability.
+
 Resolved Issues
 ---------------
 
diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 5a46737..2df9587 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -11431,3 +11431,121 @@ int rte_pmd_i40e_set_vf_vlan_filter(uint8_t port, uint16_t vlan_id,
 
 	return 0;
 }
+
+int
+rte_pmd_i40e_set_vf_tc_max_bw(uint8_t port, uint16_t vf_id,
+			      uint8_t tc_no, uint32_t bw)
+{
+	struct rte_eth_dev *dev;
+	struct i40e_pf *pf;
+	struct i40e_vsi *vsi;
+	struct i40e_hw *hw;
+	struct i40e_aqc_configure_vsi_ets_sla_bw_data tc_bw;
+	int ret = 0;
+	int i;
+
+	RTE_ETH_VALID_PORTID_OR_ERR_RET(port, -ENODEV);
+
+	dev = &rte_eth_devices[port];
+
+	if (!is_device_supported(dev, &rte_i40e_pmd))
+		return -ENOTSUP;
+
+	pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
+
+	if (vf_id >= pf->vf_num || !pf->vfs) {
+		PMD_DRV_LOG(ERR, "Invalid VF ID.");
+		return -EINVAL;
+	}
+
+	vsi = pf->vfs[vf_id].vsi;
+	if (!vsi) {
+		PMD_DRV_LOG(ERR, "Invalid VSI.");
+		return -EINVAL;
+	}
+
+	if (bw > I40E_QOS_BW_MAX) {
+		PMD_DRV_LOG(ERR, "Bandwidth should not be larger than %dMbps.",
+			    I40E_QOS_BW_MAX);
+		return -EINVAL;
+	}
+
+	if (bw % I40E_QOS_BW_GRANULARITY) {
+		PMD_DRV_LOG(ERR, "Bandwidth should be the multiple of %dMbps.",
+			    I40E_QOS_BW_GRANULARITY);
+		return -EINVAL;
+	}
+
+	bw /= I40E_QOS_BW_GRANULARITY;
+
+	if (tc_no >= I40E_MAX_TRAFFIC_CLASS) {
+		PMD_DRV_LOG(ERR, "TC No. should be less than %d.",
+			    I40E_MAX_TRAFFIC_CLASS);
+		return -EINVAL;
+	}
+
+	hw = I40E_VSI_TO_HW(vsi);
+
+	if (!(vsi->enabled_tc & BIT_ULL(tc_no))) {
+		PMD_DRV_LOG(ERR, "VF %d TC %d isn't enabled.",
+			    vf_id, tc_no);
+		return -EINVAL;
+	}
+
+	/* No change. */
+	if (bw == vsi->bw_info.bw_ets_credits[tc_no]) {
+		PMD_DRV_LOG(INFO,
+			    "No change for TC max bandwidth. Nothing to do.");
+		return 0;
+	}
+
+	/**
+	 * VF bandwidth limitation and TC bandwidth limitation cannot be
+	 * enabled in parallel, disable VF bandwidth limitation if it's
+	 * enabled.
+	 * If bw is 0, means disable bandwidth limitation. Then no need to
+	 * care about VF bandwidth limitation configuration.
+	 */
+	if (bw && vsi->bw_info.bw_limit) {
+		ret = i40e_aq_config_vsi_bw_limit(hw, vsi->seid, 0, 0, NULL);
+		if (ret) {
+			PMD_DRV_LOG(ERR,
+				    "Failed to disable VF(%d)"
+				    " bandwidth limitation, err(%d).",
+				    vf_id, ret);
+			return -EINVAL;
+		}
+
+		PMD_DRV_LOG(INFO,
+			    "VF max bandwidth is disabled according"
+			    " to TC max bandwidth setting.");
+	}
+
+	/**
+	 * Get all the TCs' info to create a whole picture.
+	 * Because the incremental change isn't permitted.
+	 */
+	memset(&tc_bw, 0, sizeof(tc_bw));
+	tc_bw.tc_valid_bits = vsi->enabled_tc;
+	for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
+		if (vsi->enabled_tc & BIT_ULL(i)) {
+			tc_bw.tc_bw_credits[i] =
+				rte_cpu_to_le_16(
+					vsi->bw_info.bw_ets_credits[i]);
+		}
+	}
+	tc_bw.tc_bw_credits[tc_no] = rte_cpu_to_le_16((uint16_t)bw);
+
+	ret = i40e_aq_config_vsi_ets_sla_bw_limit(hw, vsi->seid, &tc_bw, NULL);
+	if (ret) {
+		PMD_DRV_LOG(ERR,
+			    "Failed to set VF %d TC %d max bandwidth, err(%d).",
+			    vf_id, tc_no, ret);
+		return -EINVAL;
+	}
+
+	/* Store the configuration. */
+	vsi->bw_info.bw_ets_credits[tc_no] = (uint16_t)bw;
+
+	return 0;
+}
diff --git a/drivers/net/i40e/rte_pmd_i40e.h b/drivers/net/i40e/rte_pmd_i40e.h
index 9fdb447..08ee2b0 100644
--- a/drivers/net/i40e/rte_pmd_i40e.h
+++ b/drivers/net/i40e/rte_pmd_i40e.h
@@ -381,4 +381,26 @@ int rte_pmd_i40e_set_vf_tc_bw_alloc(uint8_t port,
 				    uint8_t tc_num,
 				    uint8_t *bw_weight);
 
+/**
+ * Set a specific TC's max bandwidth on a specific VF.
+ *
+ * @param port
+ *    The port identifier of the Ethernet device.
+ * @param vf_id
+ *    ID specifying VF.
+ * @param tc_no
+ *    Number specifying TC.
+ * @param bw
+ *    Max bandwidth for this TC.
+ * @return
+ *   - (0) if successful.
+ *   - (-ENODEV) if *port* invalid.
+ *   - (-EINVAL) if bad parameter.
+ *   - (-ENOTSUP) not supported by firmware.
+ */
+int rte_pmd_i40e_set_vf_tc_max_bw(uint8_t port,
+				  uint16_t vf_id,
+				  uint8_t tc_no,
+				  uint32_t bw);
+
 #endif /* _PMD_I40E_H_ */
diff --git a/drivers/net/i40e/rte_pmd_i40e_version.map b/drivers/net/i40e/rte_pmd_i40e_version.map
index 85bc41d..bd657ab 100644
--- a/drivers/net/i40e/rte_pmd_i40e_version.map
+++ b/drivers/net/i40e/rte_pmd_i40e_version.map
@@ -28,5 +28,6 @@ DPDK_17.05 {
 
 	rte_pmd_i40e_set_vf_max_bw;
 	rte_pmd_i40e_set_vf_tc_bw_alloc;
+	rte_pmd_i40e_set_vf_tc_max_bw;
 
 } DPDK_17.02;
-- 
1.9.3



End of dev Digest, Vol 132, Issue 84
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