qed - VF tunnelling support [VXLAN/GENEVE/GRE]

This patch adds hardware channel APIs support between
VF and PF for tunnelling configuration for the VFs.
According to that configuration VFs can run VXLAN/GENEVE/GRE
tunnels over it with tunnel features offloaded.

Using these APIs VF can also request for UDP ports configuration
to the PF, although PF and it's child VFs share the same port.

Signed-off-by: Manish Chopra <manish.chopra@cavium.com>
Signed-off-by: Yuval Mintz <yuval.mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 217 insertions, 0 deletions

diff --git a/drivers/net/ethernet/qlogic/qed/qed_sriov.c b/drivers/net/ethernet/qlogic/qed/qed_sriov.c
index 85672f6cf629..d5df29f787c5 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_sriov.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_sriov.c
@@ -2019,6 +2019,220 @@ out:
 	qed_iov_vf_mbx_start_rxq_resp(p_hwfn, p_ptt, vf, status, b_legacy_vf);
 }
 
+static void
+qed_iov_pf_update_tun_response(struct pfvf_update_tunn_param_tlv *p_resp,
+			       struct qed_tunnel_info *p_tun,
+			       u16 tunn_feature_mask)
+{
+	p_resp->tunn_feature_mask = tunn_feature_mask;
+	p_resp->vxlan_mode = p_tun->vxlan.b_mode_enabled;
+	p_resp->l2geneve_mode = p_tun->l2_geneve.b_mode_enabled;
+	p_resp->ipgeneve_mode = p_tun->ip_geneve.b_mode_enabled;
+	p_resp->l2gre_mode = p_tun->l2_gre.b_mode_enabled;
+	p_resp->ipgre_mode = p_tun->l2_gre.b_mode_enabled;
+	p_resp->vxlan_clss = p_tun->vxlan.tun_cls;
+	p_resp->l2gre_clss = p_tun->l2_gre.tun_cls;
+	p_resp->ipgre_clss = p_tun->ip_gre.tun_cls;
+	p_resp->l2geneve_clss = p_tun->l2_geneve.tun_cls;
+	p_resp->ipgeneve_clss = p_tun->ip_geneve.tun_cls;
+	p_resp->geneve_udp_port = p_tun->geneve_port.port;
+	p_resp->vxlan_udp_port = p_tun->vxlan_port.port;
+}
+
+static void
+__qed_iov_pf_update_tun_param(struct vfpf_update_tunn_param_tlv *p_req,
+			      struct qed_tunn_update_type *p_tun,
+			      enum qed_tunn_mode mask, u8 tun_cls)
+{
+	if (p_req->tun_mode_update_mask & BIT(mask)) {
+		p_tun->b_update_mode = true;
+
+		if (p_req->tunn_mode & BIT(mask))
+			p_tun->b_mode_enabled = true;
+	}
+
+	p_tun->tun_cls = tun_cls;
+}
+
+static void
+qed_iov_pf_update_tun_param(struct vfpf_update_tunn_param_tlv *p_req,
+			    struct qed_tunn_update_type *p_tun,
+			    struct qed_tunn_update_udp_port *p_port,
+			    enum qed_tunn_mode mask,
+			    u8 tun_cls, u8 update_port, u16 port)
+{
+	if (update_port) {
+		p_port->b_update_port = true;
+		p_port->port = port;
+	}
+
+	__qed_iov_pf_update_tun_param(p_req, p_tun, mask, tun_cls);
+}
+
+static bool
+qed_iov_pf_validate_tunn_param(struct vfpf_update_tunn_param_tlv *p_req)
+{
+	bool b_update_requested = false;
+
+	if (p_req->tun_mode_update_mask || p_req->update_tun_cls ||
+	    p_req->update_geneve_port || p_req->update_vxlan_port)
+		b_update_requested = true;
+
+	return b_update_requested;
+}
+
+static void qed_pf_validate_tunn_mode(struct qed_tunn_update_type *tun, int *rc)
+{
+	if (tun->b_update_mode && !tun->b_mode_enabled) {
+		tun->b_update_mode = false;
+		*rc = -EINVAL;
+	}
+}
+
+static int
+qed_pf_validate_modify_tunn_config(struct qed_hwfn *p_hwfn,
+				   u16 *tun_features, bool *update,
+				   struct qed_tunnel_info *tun_src)
+{
+	struct qed_eth_cb_ops *ops = p_hwfn->cdev->protocol_ops.eth;
+	struct qed_tunnel_info *tun = &p_hwfn->cdev->tunnel;
+	u16 bultn_vxlan_port, bultn_geneve_port;
+	void *cookie = p_hwfn->cdev->ops_cookie;
+	int i, rc = 0;
+
+	*tun_features = p_hwfn->cdev->tunn_feature_mask;
+	bultn_vxlan_port = tun->vxlan_port.port;
+	bultn_geneve_port = tun->geneve_port.port;
+	qed_pf_validate_tunn_mode(&tun_src->vxlan, &rc);
+	qed_pf_validate_tunn_mode(&tun_src->l2_geneve, &rc);
+	qed_pf_validate_tunn_mode(&tun_src->ip_geneve, &rc);
+	qed_pf_validate_tunn_mode(&tun_src->l2_gre, &rc);
+	qed_pf_validate_tunn_mode(&tun_src->ip_gre, &rc);
+
+	if ((tun_src->b_update_rx_cls || tun_src->b_update_tx_cls) &&
+	    (tun_src->vxlan.tun_cls != QED_TUNN_CLSS_MAC_VLAN ||
+	     tun_src->l2_geneve.tun_cls != QED_TUNN_CLSS_MAC_VLAN ||
+	     tun_src->ip_geneve.tun_cls != QED_TUNN_CLSS_MAC_VLAN ||
+	     tun_src->l2_gre.tun_cls != QED_TUNN_CLSS_MAC_VLAN ||
+	     tun_src->ip_gre.tun_cls != QED_TUNN_CLSS_MAC_VLAN)) {
+		tun_src->b_update_rx_cls = false;
+		tun_src->b_update_tx_cls = false;
+		rc = -EINVAL;
+	}
+
+	if (tun_src->vxlan_port.b_update_port) {
+		if (tun_src->vxlan_port.port == tun->vxlan_port.port) {
+			tun_src->vxlan_port.b_update_port = false;
+		} else {
+			*update = true;
+			bultn_vxlan_port = tun_src->vxlan_port.port;
+		}
+	}
+
+	if (tun_src->geneve_port.b_update_port) {
+		if (tun_src->geneve_port.port == tun->geneve_port.port) {
+			tun_src->geneve_port.b_update_port = false;
+		} else {
+			*update = true;
+			bultn_geneve_port = tun_src->geneve_port.port;
+		}
+	}
+
+	qed_for_each_vf(p_hwfn, i) {
+		qed_iov_bulletin_set_udp_ports(p_hwfn, i, bultn_vxlan_port,
+					       bultn_geneve_port);
+	}
+
+	qed_schedule_iov(p_hwfn, QED_IOV_WQ_BULLETIN_UPDATE_FLAG);
+	ops->ports_update(cookie, bultn_vxlan_port, bultn_geneve_port);
+
+	return rc;
+}
+
+static void qed_iov_vf_mbx_update_tunn_param(struct qed_hwfn *p_hwfn,
+					     struct qed_ptt *p_ptt,
+					     struct qed_vf_info *p_vf)
+{
+	struct qed_tunnel_info *p_tun = &p_hwfn->cdev->tunnel;
+	struct qed_iov_vf_mbx *mbx = &p_vf->vf_mbx;
+	struct pfvf_update_tunn_param_tlv *p_resp;
+	struct vfpf_update_tunn_param_tlv *p_req;
+	u8 status = PFVF_STATUS_SUCCESS;
+	bool b_update_required = false;
+	struct qed_tunnel_info tunn;
+	u16 tunn_feature_mask = 0;
+	int i, rc = 0;
+
+	mbx->offset = (u8 *)mbx->reply_virt;
+
+	memset(&tunn, 0, sizeof(tunn));
+	p_req = &mbx->req_virt->tunn_param_update;
+
+	if (!qed_iov_pf_validate_tunn_param(p_req)) {
+		DP_VERBOSE(p_hwfn, QED_MSG_IOV,
+			   "No tunnel update requested by VF\n");
+		status = PFVF_STATUS_FAILURE;
+		goto send_resp;
+	}
+
+	tunn.b_update_rx_cls = p_req->update_tun_cls;
+	tunn.b_update_tx_cls = p_req->update_tun_cls;
+
+	qed_iov_pf_update_tun_param(p_req, &tunn.vxlan, &tunn.vxlan_port,
+				    QED_MODE_VXLAN_TUNN, p_req->vxlan_clss,
+				    p_req->update_vxlan_port,
+				    p_req->vxlan_port);
+	qed_iov_pf_update_tun_param(p_req, &tunn.l2_geneve, &tunn.geneve_port,
+				    QED_MODE_L2GENEVE_TUNN,
+				    p_req->l2geneve_clss,
+				    p_req->update_geneve_port,
+				    p_req->geneve_port);
+	__qed_iov_pf_update_tun_param(p_req, &tunn.ip_geneve,
+				      QED_MODE_IPGENEVE_TUNN,
+				      p_req->ipgeneve_clss);
+	__qed_iov_pf_update_tun_param(p_req, &tunn.l2_gre,
+				      QED_MODE_L2GRE_TUNN, p_req->l2gre_clss);
+	__qed_iov_pf_update_tun_param(p_req, &tunn.ip_gre,
+				      QED_MODE_IPGRE_TUNN, p_req->ipgre_clss);
+
+	/* If PF modifies VF's req then it should
+	 * still return an error in case of partial configuration
+	 * or modified configuration as opposed to requested one.
+	 */
+	rc = qed_pf_validate_modify_tunn_config(p_hwfn, &tunn_feature_mask,
+						&b_update_required, &tunn);
+
+	if (rc)
+		status = PFVF_STATUS_FAILURE;
+
+	/* If QED client is willing to update anything ? */
+	if (b_update_required) {
+		u16 geneve_port;
+
+		rc = qed_sp_pf_update_tunn_cfg(p_hwfn, &tunn,
+					       QED_SPQ_MODE_EBLOCK, NULL);
+		if (rc)
+			status = PFVF_STATUS_FAILURE;
+
+		geneve_port = p_tun->geneve_port.port;
+		qed_for_each_vf(p_hwfn, i) {
+			qed_iov_bulletin_set_udp_ports(p_hwfn, i,
+						       p_tun->vxlan_port.port,
+						       geneve_port);
+		}
+	}
+
+send_resp:
+	p_resp = qed_add_tlv(p_hwfn, &mbx->offset,
+			     CHANNEL_TLV_UPDATE_TUNN_PARAM, sizeof(*p_resp));
+
+	qed_iov_pf_update_tun_response(p_resp, p_tun, tunn_feature_mask);
+	qed_add_tlv(p_hwfn, &mbx->offset, CHANNEL_TLV_LIST_END,
+		    sizeof(struct channel_list_end_tlv));
+
+	qed_iov_send_response(p_hwfn, p_ptt, p_vf, sizeof(*p_resp), status);
+}
+
 static void qed_iov_vf_mbx_start_txq_resp(struct qed_hwfn *p_hwfn,
 					  struct qed_ptt *p_ptt,
 					  struct qed_vf_info *p_vf, u8 status)
@@ -3275,6 +3489,9 @@ static void qed_iov_process_mbx_req(struct qed_hwfn *p_hwfn,
 		case CHANNEL_TLV_RELEASE:
 			qed_iov_vf_mbx_release(p_hwfn, p_ptt, p_vf);
 			break;
+		case CHANNEL_TLV_UPDATE_TUNN_PARAM:
+			qed_iov_vf_mbx_update_tunn_param(p_hwfn, p_ptt, p_vf);
+			break;
 		}
 	} else if (qed_iov_tlv_supported(mbx->first_tlv.tl.type)) {
 		DP_VERBOSE(p_hwfn, QED_MSG_IOV,