[PATCH net-next 3/5] bnxt_en: Propagate trusted VF attribute to firmware.

[Michael Chan <michael.chan@broadcom.com>]

Newer firmware understands the concept of a trusted VF, so propagate the
trusted VF attribute set by the PF admin. to the firmware.  Also, check
the firmware trusted setting when considering the VF MAC address change
and reporting the trusted setting to the user.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c       |  4 ++
 drivers/net/ethernet/broadcom/bnxt/bnxt.h       |  2 +
 drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c | 58 +++++++++++++++++++++++--
 3 files changed, 60 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 0f7a34a..9700891 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -6683,6 +6683,10 @@ static int bnxt_hwrm_ver_get(struct bnxt *bp)
 	    VER_GET_RESP_DEV_CAPS_CFG_FLOW_HANDLE_64BIT_SUPPORTED)
 		bp->fw_cap |= BNXT_FW_CAP_OVS_64BIT_HANDLE;
 
+	if (dev_caps_cfg &
+	    VER_GET_RESP_DEV_CAPS_CFG_TRUSTED_VF_SUPPORTED)
+		bp->fw_cap |= BNXT_FW_CAP_TRUSTED_VF;
+
 hwrm_ver_get_exit:
 	mutex_unlock(&bp->hwrm_cmd_lock);
 	return rc;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 17554d4..ecbe7d2 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -945,6 +945,7 @@ struct bnxt_vf_info {
 					 * stored by PF.
 					 */
 	u16	vlan;
+	u16	func_qcfg_flags;
 	u32	flags;
 #define BNXT_VF_QOS		0x1
 #define BNXT_VF_SPOOFCHK	0x2
@@ -1478,6 +1479,7 @@ struct bnxt {
 	#define BNXT_FW_CAP_IF_CHANGE			0x00000010
 	#define BNXT_FW_CAP_KONG_MB_CHNL		0x00000080
 	#define BNXT_FW_CAP_OVS_64BIT_HANDLE		0x00000400
+	#define BNXT_FW_CAP_TRUSTED_VF			0x00000800
 
 #define BNXT_NEW_RM(bp)		((bp)->fw_cap & BNXT_FW_CAP_NEW_RM)
 	u32			hwrm_spec_code;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
index d80f5c9..2b90a2b 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
@@ -121,6 +121,54 @@ int bnxt_set_vf_spoofchk(struct net_device *dev, int vf_id, bool setting)
 	return rc;
 }
 
+static int bnxt_hwrm_func_qcfg_flags(struct bnxt *bp, struct bnxt_vf_info *vf)
+{
+	struct hwrm_func_qcfg_output *resp = bp->hwrm_cmd_resp_addr;
+	struct hwrm_func_qcfg_input req = {0};
+	int rc;
+
+	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_QCFG, -1, -1);
+	req.fid = cpu_to_le16(vf->fw_fid);
+	mutex_lock(&bp->hwrm_cmd_lock);
+	rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
+	if (rc) {
+		mutex_unlock(&bp->hwrm_cmd_lock);
+		return -EIO;
+	}
+	vf->func_qcfg_flags = le16_to_cpu(resp->flags);
+	mutex_unlock(&bp->hwrm_cmd_lock);
+	return 0;
+}
+
+static bool bnxt_is_trusted_vf(struct bnxt *bp, struct bnxt_vf_info *vf)
+{
+	if (!(bp->fw_cap & BNXT_FW_CAP_TRUSTED_VF))
+		return !!(vf->flags & BNXT_VF_TRUST);
+
+	bnxt_hwrm_func_qcfg_flags(bp, vf);
+	return !!(vf->func_qcfg_flags & FUNC_QCFG_RESP_FLAGS_TRUSTED_VF);
+}
+
+static int bnxt_hwrm_set_trusted_vf(struct bnxt *bp, struct bnxt_vf_info *vf)
+{
+	struct hwrm_func_cfg_input req = {0};
+	int rc;
+
+	if (!(bp->fw_cap & BNXT_FW_CAP_TRUSTED_VF))
+		return 0;
+
+	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_CFG, -1, -1);
+	req.fid = cpu_to_le16(vf->fw_fid);
+	if (vf->flags & BNXT_VF_TRUST)
+		req.flags = cpu_to_le32(FUNC_CFG_REQ_FLAGS_TRUSTED_VF_ENABLE);
+	else
+		req.flags = cpu_to_le32(FUNC_CFG_REQ_FLAGS_TRUSTED_VF_DISABLE);
+	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
+	if (rc)
+		return -EIO;
+	return 0;
+}
+
 int bnxt_set_vf_trust(struct net_device *dev, int vf_id, bool trusted)
 {
 	struct bnxt *bp = netdev_priv(dev);
@@ -135,6 +183,7 @@ int bnxt_set_vf_trust(struct net_device *dev, int vf_id, bool trusted)
 	else
 		vf->flags &= ~BNXT_VF_TRUST;
 
+	bnxt_hwrm_set_trusted_vf(bp, vf);
 	return 0;
 }
 
@@ -164,7 +213,7 @@ int bnxt_get_vf_config(struct net_device *dev, int vf_id,
 	else
 		ivi->qos = 0;
 	ivi->spoofchk = !!(vf->flags & BNXT_VF_SPOOFCHK);
-	ivi->trusted = !!(vf->flags & BNXT_VF_TRUST);
+	ivi->trusted = bnxt_is_trusted_vf(bp, vf);
 	if (!(vf->flags & BNXT_VF_LINK_FORCED))
 		ivi->linkstate = IFLA_VF_LINK_STATE_AUTO;
 	else if (vf->flags & BNXT_VF_LINK_UP)
@@ -935,9 +984,10 @@ static int bnxt_vf_configure_mac(struct bnxt *bp, struct bnxt_vf_info *vf)
 	 * if the PF assigned MAC address is zero
 	 */
 	if (req->enables & cpu_to_le32(FUNC_VF_CFG_REQ_ENABLES_DFLT_MAC_ADDR)) {
+		bool trust = bnxt_is_trusted_vf(bp, vf);
+
 		if (is_valid_ether_addr(req->dflt_mac_addr) &&
-		    ((vf->flags & BNXT_VF_TRUST) ||
-		     !is_valid_ether_addr(vf->mac_addr) ||
+		    (trust || !is_valid_ether_addr(vf->mac_addr) ||
 		     ether_addr_equal(req->dflt_mac_addr, vf->mac_addr))) {
 			ether_addr_copy(vf->vf_mac_addr, req->dflt_mac_addr);
 			return bnxt_hwrm_exec_fwd_resp(bp, vf, msg_size);
@@ -962,7 +1012,7 @@ static int bnxt_vf_validate_set_mac(struct bnxt *bp, struct bnxt_vf_info *vf)
 	 * Otherwise, it must match the VF MAC address if firmware spec >=
 	 * 1.2.2
 	 */
-	if (vf->flags & BNXT_VF_TRUST) {
+	if (bnxt_is_trusted_vf(bp, vf)) {
 		mac_ok = true;
 	} else if (is_valid_ether_addr(vf->mac_addr)) {
 		if (ether_addr_equal((const u8 *)req->l2_addr, vf->mac_addr))
-- 
2.5.1