Merge branch 'qed-Use-trust-mode-to-override-forced-MAC'

Shahed Shaikh says:

====================
qed* : Use trust mode to override forced MAC

This patchset adds a support to override forced MAC (MAC set by PF for a VF)
when trust mode is enabled using

First patch adds a real change to use .ndo_set_vf_trust to override forced MAC
and allow user to change VFs from VF interface itself.

Second patch takes care of a corner case, where MAC change from VF won't
take effect when VF interface is down, by introducing a new TLV
(a way to send message from VF to PF) to give a hint to PF to update
its bulletin board.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qed/qed_l2.c

@@ -2850,6 +2850,24 @@ static int qed_fp_cqe_completion(struct qed_dev *dev,
 				      cqe);
 }
 
+static int qed_req_bulletin_update_mac(struct qed_dev *cdev, u8 *mac)
+{
+	int i, ret;
+
+	if (IS_PF(cdev))
+		return 0;
+
+	for_each_hwfn(cdev, i) {
+		struct qed_hwfn *p_hwfn = &cdev->hwfns[i];
+
+		ret = qed_vf_pf_bulletin_update_mac(p_hwfn, mac);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
 #ifdef CONFIG_QED_SRIOV
 extern const struct qed_iov_hv_ops qed_iov_ops_pass;
 #endif
@@ -2887,6 +2905,7 @@ static const struct qed_eth_ops qed_eth_ops_pass = {
 	.ntuple_filter_config = &qed_ntuple_arfs_filter_config,
 	.configure_arfs_searcher = &qed_configure_arfs_searcher,
 	.get_coalesce = &qed_get_coalesce,
+	.req_bulletin_update_mac = &qed_req_bulletin_update_mac,
 };
 
 const struct qed_eth_ops *qed_get_eth_ops(void)

drivers/net/ethernet/qlogic/qed/qed_vf.c

@@ -1374,6 +1374,35 @@ int qed_vf_pf_get_coalesce(struct qed_hwfn *p_hwfn,
 	return rc;
 }
 
+int
+qed_vf_pf_bulletin_update_mac(struct qed_hwfn *p_hwfn,
+			      u8 *p_mac)
+{
+	struct qed_vf_iov *p_iov = p_hwfn->vf_iov_info;
+	struct vfpf_bulletin_update_mac_tlv *p_req;
+	struct pfvf_def_resp_tlv *p_resp;
+	int rc;
+
+	if (!p_mac)
+		return -EINVAL;
+
+	/* clear mailbox and prep header tlv */
+	p_req = qed_vf_pf_prep(p_hwfn, CHANNEL_TLV_BULLETIN_UPDATE_MAC,
+			       sizeof(*p_req));
+	ether_addr_copy(p_req->mac, p_mac);
+	DP_VERBOSE(p_hwfn, QED_MSG_IOV,
+		   "Requesting bulletin update for MAC[%pM]\n", p_mac);
+
+	/* add list termination tlv */
+	qed_add_tlv(p_hwfn, &p_iov->offset, CHANNEL_TLV_LIST_END,
+		    sizeof(struct channel_list_end_tlv));
+
+	p_resp = &p_iov->pf2vf_reply->default_resp;
+	rc = qed_send_msg2pf(p_hwfn, &p_resp->hdr.status, sizeof(*p_resp));
+	qed_vf_pf_req_end(p_hwfn, rc);
+	return rc;
+}
+
 int
 qed_vf_pf_set_coalesce(struct qed_hwfn *p_hwfn,
 		       u16 rx_coal, u16 tx_coal, struct qed_queue_cid *p_cid)

drivers/net/ethernet/qlogic/qed/qed_vf.h

@@ -518,6 +518,12 @@ struct pfvf_read_coal_resp_tlv {
 	u8 padding[6];
 };
 
+struct vfpf_bulletin_update_mac_tlv {
+	struct vfpf_first_tlv first_tlv;
+	u8 mac[ETH_ALEN];
+	u8 padding[2];
+};
+
 union vfpf_tlvs {
 	struct vfpf_first_tlv first_tlv;
 	struct vfpf_acquire_tlv acquire;
@@ -532,6 +538,7 @@ union vfpf_tlvs {
 	struct vfpf_update_tunn_param_tlv tunn_param_update;
 	struct vfpf_update_coalesce update_coalesce;
 	struct vfpf_read_coal_req_tlv read_coal_req;
+	struct vfpf_bulletin_update_mac_tlv bulletin_update_mac;
 	struct tlv_buffer_size tlv_buf_size;
 };
 
@@ -650,6 +657,7 @@ enum {
 	CHANNEL_TLV_COALESCE_UPDATE,
 	CHANNEL_TLV_QID,
 	CHANNEL_TLV_COALESCE_READ,
+	CHANNEL_TLV_BULLETIN_UPDATE_MAC,
 	CHANNEL_TLV_MAX,
 
 	/* Required for iterating over vport-update tlvs.
@@ -1042,6 +1050,13 @@ int qed_vf_pf_tunnel_param_update(struct qed_hwfn *p_hwfn,
 				  struct qed_tunnel_info *p_tunn);
 
 u32 qed_vf_hw_bar_size(struct qed_hwfn *p_hwfn, enum BAR_ID bar_id);
+/**
+ * @brief - Ask PF to update the MAC address in it's bulletin board
+ *
+ * @param p_mac - mac address to be updated in bulletin board
+ */
+int qed_vf_pf_bulletin_update_mac(struct qed_hwfn *p_hwfn, u8 *p_mac);
+
 #else
 static inline void qed_vf_get_link_params(struct qed_hwfn *p_hwfn,
 					  struct qed_mcp_link_params *params)
@@ -1228,6 +1243,12 @@ static inline int qed_vf_pf_tunnel_param_update(struct qed_hwfn *p_hwfn,
 	return -EINVAL;
 }
 
+static inline int qed_vf_pf_bulletin_update_mac(struct qed_hwfn *p_hwfn,
+						u8 *p_mac)
+{
+	return -EINVAL;
+}
+
 static inline u32
 qed_vf_hw_bar_size(struct qed_hwfn  *p_hwfn,
 		   enum BAR_ID bar_id)

drivers/net/ethernet/qlogic/qede/qede_filter.c

@@ -550,8 +550,7 @@ void qede_force_mac(void *dev, u8 *mac, bool forced)
 
 	__qede_lock(edev);
 
-	/* MAC hints take effect only if we haven't set one already */
-	if (is_valid_ether_addr(edev->ndev->dev_addr) && !forced) {
+	if (!is_valid_ether_addr(mac)) {
 		__qede_unlock(edev);
 		return;
 	}
@@ -1161,6 +1160,10 @@ int qede_set_mac_addr(struct net_device *ndev, void *p)
 	if (edev->state != QEDE_STATE_OPEN) {
 		DP_VERBOSE(edev, NETIF_MSG_IFDOWN,
 			   "The device is currently down\n");
+		/* Ask PF to explicitly update a copy in bulletin board */
+		if (IS_VF(edev) && edev->ops->req_bulletin_update_mac)
+			edev->ops->req_bulletin_update_mac(edev->cdev,
+							   ndev->dev_addr);
 		goto out;
 	}
 

include/linux/qed/qed_eth_if.h

@@ -352,6 +352,7 @@ struct qed_eth_ops {
 	int (*configure_arfs_searcher)(struct qed_dev *cdev,
 				       enum qed_filter_config_mode mode);
 	int (*get_coalesce)(struct qed_dev *cdev, u16 *coal, void *handle);
+	int (*req_bulletin_update_mac)(struct qed_dev *cdev, u8 *mac);
 };
 
 const struct qed_eth_ops *qed_get_eth_ops(void);