Re: [dpdk-dev] [PATCH 2/2 v3] i40e: Add floating VEB support in i40e

["Xu, Qian Q" <qian.q.xu@intel.com>]

Suggest to add document for why to have it, the basic usage and the sample of how to use it. 

Thanks
Qian

-----Original Message-----
From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Zhe Tao
Sent: Thursday, February 25, 2016 2:32 PM
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH 2/2 v3] i40e: Add floating VEB support in i40e

This patch add the support for floating VEB in i40e.
All the VFs VSIs can decide whether to connect to the legacy VEB/VEPA or  the floating VEB. When connect to the floating VEB a new floating VEB is  created. Now all the VFs need to connect to floating VEB or legacy VEB,  cannot connect to both of them. The PF and VMDQ,FD VSIs still connect to the old legacy VEB/VEPA.

All the VEB/VEPA concepts are not specific for FVL, they are defined in the 802.1Qbg spec.

Signed-off-by: Zhe Tao <zhe.tao@intel.com>
---
 doc/guides/rel_notes/release_16_04.rst |   2 +
 drivers/net/i40e/Makefile              |   2 +-
 drivers/net/i40e/i40e_ethdev.c         | 105 +++++++++++++++++++++++++++------
 drivers/net/i40e/i40e_ethdev.h         |   4 ++
 drivers/net/i40e/i40e_pf.c             |  11 +++-
 5 files changed, 103 insertions(+), 21 deletions(-)

diff --git a/doc/guides/rel_notes/release_16_04.rst b/doc/guides/rel_notes/release_16_04.rst
index 5786f74..446112c 100644
--- a/doc/guides/rel_notes/release_16_04.rst
+++ b/doc/guides/rel_notes/release_16_04.rst
@@ -46,6 +46,8 @@ This section should contain new features added in this release. Sample format:
 
 * **Added vhost-user live migration support.**
 
+* **Added floating VEB support for FVL.**
+
 
 Resolved Issues
 ---------------
diff --git a/drivers/net/i40e/Makefile b/drivers/net/i40e/Makefile index 033ee4a..2e01d45 100644
--- a/drivers/net/i40e/Makefile
+++ b/drivers/net/i40e/Makefile
@@ -39,7 +39,7 @@ LIB = librte_pmd_i40e.a  CFLAGS += -O3  CFLAGS += $(WERROR_FLAGS) -DPF_DRIVER -DVF_DRIVER -DINTEGRATED_VF  CFLAGS += -DX722_SUPPORT -DX722_A0_SUPPORT
-
+CFLAGS += -I$(RTE_SDK)/lib/librte_eal/common
 EXPORT_MAP := rte_pmd_i40e_version.map
 
 LIBABIVER := 1
diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c index ef24122..f8554c9 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -744,6 +744,7 @@ eth_i40e_dev_init(struct rte_eth_dev *dev)
 	pf->adapter = I40E_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
 	pf->adapter->eth_dev = dev;
 	pf->dev_data = dev->data;
+	pf->floating = internal_config.floating;
 
 	hw->back = I40E_PF_TO_ADAPTER(pf);
 	hw->hw_addr = (uint8_t *)(pci_dev->mem_resource[0].addr);
@@ -3592,21 +3593,27 @@ i40e_veb_release(struct i40e_veb *veb)
 	struct i40e_vsi *vsi;
 	struct i40e_hw *hw;
 
-	if (veb == NULL || veb->associate_vsi == NULL)
+	if (veb == NULL)
 		return -EINVAL;
 
 	if (!TAILQ_EMPTY(&veb->head)) {
 		PMD_DRV_LOG(ERR, "VEB still has VSI attached, can't remove");
 		return -EACCES;
 	}
+	/* associate_vsi field is NULL for floating VEB */
+	if (veb->associate_vsi != NULL) {
+		vsi = veb->associate_vsi;
+		hw = I40E_VSI_TO_HW(vsi);
 
-	vsi = veb->associate_vsi;
-	hw = I40E_VSI_TO_HW(vsi);
+		vsi->uplink_seid = veb->uplink_seid;
+		vsi->veb = NULL;
+	} else {
+		veb->associate_pf->main_vsi->floating_veb = NULL;
+		hw = I40E_VSI_TO_HW(veb->associate_pf->main_vsi);
+	}
 
-	vsi->uplink_seid = veb->uplink_seid;
 	i40e_aq_delete_element(hw, veb->seid, NULL);
 	rte_free(veb);
-	vsi->veb = NULL;
 	return I40E_SUCCESS;
 }
 
@@ -3618,9 +3625,9 @@ i40e_veb_setup(struct i40e_pf *pf, struct i40e_vsi *vsi)
 	int ret;
 	struct i40e_hw *hw;
 
-	if (NULL == pf || vsi == NULL) {
+	if (NULL == pf) {
 		PMD_DRV_LOG(ERR, "veb setup failed, "
-			    "associated VSI shouldn't null");
+			    "associated PF shouldn't null");
 		return NULL;
 	}
 	hw = I40E_PF_TO_HW(pf);
@@ -3632,11 +3639,19 @@ i40e_veb_setup(struct i40e_pf *pf, struct i40e_vsi *vsi)
 	}
 
 	veb->associate_vsi = vsi;
+	veb->associate_pf = pf;
 	TAILQ_INIT(&veb->head);
-	veb->uplink_seid = vsi->uplink_seid;
+	veb->uplink_seid = vsi ? vsi->uplink_seid : 0;
 
-	ret = i40e_aq_add_veb(hw, veb->uplink_seid, vsi->seid,
-		I40E_DEFAULT_TCMAP, false, false, &veb->seid, NULL);
+	/* create floating veb if vsi is NULL */
+	if (vsi != NULL) {
+		ret = i40e_aq_add_veb(hw, veb->uplink_seid, vsi->seid,
+				      I40E_DEFAULT_TCMAP, false, false,
+				      &veb->seid, NULL);
+	} else {
+		ret = i40e_aq_add_veb(hw, 0, 0, I40E_DEFAULT_TCMAP,
+				      false, false, &veb->seid, NULL);
+	}
 
 	if (ret != I40E_SUCCESS) {
 		PMD_DRV_LOG(ERR, "Add veb failed, aq_err: %d", @@ -3688,12 +3703,22 @@ i40e_vsi_release(struct i40e_vsi *vsi)
 		i40e_veb_release(vsi->veb);
 	}
 
+	if (vsi->floating_veb) {
+		TAILQ_FOREACH(vsi_list, &vsi->floating_veb->head, list) {
+			if (i40e_vsi_release(vsi_list->vsi) != I40E_SUCCESS)
+				return -1;
+			TAILQ_REMOVE(&vsi->floating_veb->head, vsi_list, list);
+		}
+		i40e_veb_release(vsi->floating_veb);
+	}
+
 	/* Remove all macvlan filters of the VSI */
 	i40e_vsi_remove_all_macvlan_filter(vsi);
 	TAILQ_FOREACH(f, &vsi->mac_list, next)
 		rte_free(f);
 
-	if (vsi->type != I40E_VSI_MAIN) {
+	if (vsi->type != I40E_VSI_MAIN &&
+	    ((vsi->type != I40E_VSI_SRIOV) || !pf->floating)) {
 		/* Remove vsi from parent's sibling list */
 		if (vsi->parent_vsi == NULL || vsi->parent_vsi->veb == NULL) {
 			PMD_DRV_LOG(ERR, "VSI's parent VSI is NULL"); @@ -3707,6 +3732,23 @@ i40e_vsi_release(struct i40e_vsi *vsi)
 		if (ret != I40E_SUCCESS)
 			PMD_DRV_LOG(ERR, "Failed to delete element");
 	}
+
+	if ((vsi->type == I40E_VSI_SRIOV) && pf->floating) {
+		/* Remove vsi from parent's sibling list */
+		if (vsi->parent_vsi == NULL ||
+		    vsi->parent_vsi->floating_veb == NULL) {
+			PMD_DRV_LOG(ERR, "VSI's parent VSI is NULL");
+			return I40E_ERR_PARAM;
+		}
+		TAILQ_REMOVE(&vsi->parent_vsi->floating_veb->head,
+			     &vsi->sib_vsi_list, list);
+
+		/* Remove all switch element of the VSI */
+		ret = i40e_aq_delete_element(hw, vsi->seid, NULL);
+		if (ret != I40E_SUCCESS)
+			PMD_DRV_LOG(ERR, "Failed to delete element");
+	}
+
 	i40e_res_pool_free(&pf->qp_pool, vsi->base_queue);
 
 	if (vsi->type != I40E_VSI_SRIOV)
@@ -3837,7 +3879,8 @@ i40e_vsi_setup(struct i40e_pf *pf,
 	struct ether_addr broadcast =
 		{.addr_bytes = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}};
 
-	if (type != I40E_VSI_MAIN && uplink_vsi == NULL) {
+	if (type != I40E_VSI_MAIN && type != I40E_VSI_SRIOV &&
+	    uplink_vsi == NULL) {
 		PMD_DRV_LOG(ERR, "VSI setup failed, "
 			    "VSI link shouldn't be NULL");
 		return NULL;
@@ -3849,11 +3892,28 @@ i40e_vsi_setup(struct i40e_pf *pf,
 		return NULL;
 	}
 
-	/* If uplink vsi didn't setup VEB, create one first */
-	if (type != I40E_VSI_MAIN && uplink_vsi->veb == NULL) {
+	/* two situations
+	 * 1.type is not MAIN and uplink vsi is not NULL
+	 * If uplink vsi didn't setup VEB, create one first under veb field
+	 * 2.type is SRIOV and the uplink is NULL
+	 * If floating VEB is NULL, create one veb under floating veb field
+	 */
+
+	if (type != I40E_VSI_MAIN && uplink_vsi != NULL &&
+	    uplink_vsi->veb == NULL) {
 		uplink_vsi->veb = i40e_veb_setup(pf, uplink_vsi);
 
-		if (NULL == uplink_vsi->veb) {
+		if (uplink_vsi->veb == NULL) {
+			PMD_DRV_LOG(ERR, "VEB setup failed");
+			return NULL;
+		}
+	}
+
+	if (type == I40E_VSI_SRIOV && uplink_vsi == NULL &&
+	    pf->main_vsi->floating_veb == NULL) {
+		pf->main_vsi->floating_veb = i40e_veb_setup(pf, uplink_vsi);
+
+		if (pf->main_vsi->floating_veb == NULL) {
 			PMD_DRV_LOG(ERR, "VEB setup failed");
 			return NULL;
 		}
@@ -4022,7 +4082,11 @@ i40e_vsi_setup(struct i40e_pf *pf,
 		 * For other VSI, the uplink_seid equals to uplink VSI's
 		 * uplink_seid since they share same VEB
 		 */
-		vsi->uplink_seid = uplink_vsi->uplink_seid;
+		if (uplink_vsi == NULL) {
+			vsi->uplink_seid = pf->main_vsi->floating_veb->seid;
+		} else {
+			vsi->uplink_seid = uplink_vsi->uplink_seid;
+		}
 		ctxt.pf_num = hw->pf_id;
 		ctxt.vf_num = hw->func_caps.vf_base_id + user_param;
 		ctxt.uplink_seid = vsi->uplink_seid;
@@ -4130,8 +4194,13 @@ i40e_vsi_setup(struct i40e_pf *pf,
 		vsi->seid = ctxt.seid;
 		vsi->vsi_id = ctxt.vsi_number;
 		vsi->sib_vsi_list.vsi = vsi;
-		TAILQ_INSERT_TAIL(&uplink_vsi->veb->head,
-				&vsi->sib_vsi_list, list);
+		if (vsi->type == I40E_VSI_SRIOV && uplink_vsi == NULL) {
+			TAILQ_INSERT_TAIL(&pf->main_vsi->floating_veb->head,
+					  &vsi->sib_vsi_list, list);
+		} else {
+			TAILQ_INSERT_TAIL(&uplink_vsi->veb->head,
+					  &vsi->sib_vsi_list, list);
+		}
 	}
 
 	/* MAC/VLAN configuration */
diff --git a/drivers/net/i40e/i40e_ethdev.h b/drivers/net/i40e/i40e_ethdev.h index 6edd7dd..3bac60a 100644
--- a/drivers/net/i40e/i40e_ethdev.h
+++ b/drivers/net/i40e/i40e_ethdev.h
@@ -36,6 +36,7 @@
 
 #include <rte_eth_ctrl.h>
 #include <rte_time.h>
+#include <eal_internal_cfg.h>
 
 #define I40E_VLAN_TAG_SIZE        4
 
@@ -203,6 +204,7 @@ struct i40e_tx_queue;  struct i40e_veb {
 	struct i40e_vsi_list_head head;
 	struct i40e_vsi *associate_vsi; /* Associate VSI who owns the VEB */
+	struct i40e_pf *associate_pf; /* Associate PF who owns the VEB */
 	uint16_t seid; /* The seid of VEB itself */
 	uint16_t uplink_seid; /* The uplink seid of this VEB */
 	uint16_t stats_idx;
@@ -254,6 +256,7 @@ struct i40e_vsi {
 	struct i40e_vsi_list sib_vsi_list; /* sibling vsi list */
 	struct i40e_vsi *parent_vsi;
 	struct i40e_veb *veb;    /* Associated veb, could be null */
+	struct i40e_veb *floating_veb; /* Associated floating veb */
 	bool offset_loaded;
 	enum i40e_vsi_type type; /* VSI types */
 	uint16_t vlan_num;       /* Total VLAN number */
@@ -440,6 +443,7 @@ struct i40e_pf {
 	struct i40e_fc_conf fc_conf; /* Flow control conf */
 	struct i40e_mirror_rule_list mirror_list;
 	uint16_t nb_mirror_rule;   /* The number of mirror rules */
+	uint16_t floating; /* The flag to use the floating VEB */
 };
 
 enum pending_msg {
diff --git a/drivers/net/i40e/i40e_pf.c b/drivers/net/i40e/i40e_pf.c index cbf4e5b..7ce399b 100644
--- a/drivers/net/i40e/i40e_pf.c
+++ b/drivers/net/i40e/i40e_pf.c
@@ -124,6 +124,7 @@ i40e_pf_host_vf_reset(struct i40e_pf_vf *vf, bool do_hw_reset)  {
 	uint32_t val, i;
 	struct i40e_hw *hw = I40E_PF_TO_HW(vf->pf);
+	struct i40e_pf *pf = vf->pf;
 	uint16_t vf_id, abs_vf_id, vf_msix_num;
 	int ret;
 	struct i40e_virtchnl_queue_select qsel; @@ -223,9 +224,15 @@ i40e_pf_host_vf_reset(struct i40e_pf_vf *vf, bool do_hw_reset)
 	vf->reset_cnt++;
 	I40E_WRITE_FLUSH(hw);
 
+	if (pf->floating == true) {
+		vf->vsi = i40e_vsi_setup(vf->pf, I40E_VSI_SRIOV,
+			NULL, vf->vf_idx);
+	} else {
 	/* Allocate resource again */
-	vf->vsi = i40e_vsi_setup(vf->pf, I40E_VSI_SRIOV,
-			vf->pf->main_vsi, vf->vf_idx);
+		vf->vsi = i40e_vsi_setup(vf->pf, I40E_VSI_SRIOV,
+				vf->pf->main_vsi, vf->vf_idx);
+	}
+
 	if (vf->vsi == NULL) {
 		PMD_DRV_LOG(ERR, "Add vsi failed");
 		return -EFAULT;
--
2.1.4