qed* : Add new TLV to request PF to update MAC in bulletin board

There may be a need for VF driver to request PF to explicitly update its
bulletin with a MAC address.
e.g. When user assigns a MAC address to VF while VF is still down,
and PF's bulletin board contains different MAC address, in this case,
when VF's interface is brought up, it gets loaded with MAC address from
bulletin board which is not desirable.

To handle this corner case, we need a new TLV to request PF to update
its bulletin board with suggested MAC.

This request will be honored only for trusted VFs.

Signed-off-by: Shahed Shaikh <shahed.shaikh@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 37 insertions, 0 deletions

diff --git a/drivers/net/ethernet/qlogic/qed/qed_sriov.c b/drivers/net/ethernet/qlogic/qed/qed_sriov.c
index 77376fda8eae..f01bf52bc381 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_sriov.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_sriov.c
@@ -3820,6 +3820,40 @@ static void qed_iov_get_link(struct qed_hwfn *p_hwfn,
 		__qed_vf_get_link_caps(p_hwfn, p_caps, p_bulletin);
 }
 
+static int
+qed_iov_vf_pf_bulletin_update_mac(struct qed_hwfn *p_hwfn,
+				  struct qed_ptt *p_ptt,
+				  struct qed_vf_info *p_vf)
+{
+	struct qed_bulletin_content *p_bulletin = p_vf->bulletin.p_virt;
+	struct qed_iov_vf_mbx *mbx = &p_vf->vf_mbx;
+	struct vfpf_bulletin_update_mac_tlv *p_req;
+	u8 status = PFVF_STATUS_SUCCESS;
+	int rc = 0;
+
+	if (!p_vf->p_vf_info.is_trusted_configured) {
+		DP_VERBOSE(p_hwfn,
+			   QED_MSG_IOV,
+			   "Blocking bulletin update request from untrusted VF[%d]\n",
+			   p_vf->abs_vf_id);
+		status = PFVF_STATUS_NOT_SUPPORTED;
+		rc = -EINVAL;
+		goto send_status;
+	}
+
+	p_req = &mbx->req_virt->bulletin_update_mac;
+	ether_addr_copy(p_bulletin->mac, p_req->mac);
+	DP_VERBOSE(p_hwfn, QED_MSG_IOV,
+		   "Updated bulletin of VF[%d] with requested MAC[%pM]\n",
+		   p_vf->abs_vf_id, p_req->mac);
+
+send_status:
+	qed_iov_prepare_resp(p_hwfn, p_ptt, p_vf,
+			     CHANNEL_TLV_BULLETIN_UPDATE_MAC,
+			     sizeof(struct pfvf_def_resp_tlv), status);
+	return rc;
+}
+
 static void qed_iov_process_mbx_req(struct qed_hwfn *p_hwfn,
 				    struct qed_ptt *p_ptt, int vfid)
 {
@@ -3899,6 +3933,9 @@ static void qed_iov_process_mbx_req(struct qed_hwfn *p_hwfn,
 		case CHANNEL_TLV_COALESCE_READ:
 			qed_iov_vf_pf_get_coalesce(p_hwfn, p_ptt, p_vf);
 			break;
+		case CHANNEL_TLV_BULLETIN_UPDATE_MAC:
+			qed_iov_vf_pf_bulletin_update_mac(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,