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...@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
