bnxt_en: Support QOS and TPID settings for the SRIOV VLAN

With recent changes in the .ndo_set_vf_*() guidelines, resubmitting
this patch that was reverted eariler in 2023:

c2715368 ("Revert "bnxt_en: Support QOS and TPID settings for the SRIOV VLAN")

Add these missing settings in the .ndo_set_vf_vlan() method.
Older firmware does not support the TPID setting so check for
proper support.

Remove the unused BNXT_VF_QOS flag.
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20240828183235.128948-4-michael.chan@broadcom.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -9196,6 +9196,8 @@ static int __bnxt_hwrm_func_qcaps(struct bnxt *bp)
 		bp->fw_cap |= BNXT_FW_CAP_HOT_RESET_IF;
 	if (BNXT_PF(bp) && (flags_ext & FUNC_QCAPS_RESP_FLAGS_EXT_FW_LIVEPATCH_SUPPORTED))
 		bp->fw_cap |= BNXT_FW_CAP_LIVEPATCH;
+	if (BNXT_PF(bp) && (flags_ext & FUNC_QCAPS_RESP_FLAGS_EXT_DFLT_VLAN_TPID_PCP_SUPPORTED))
+		bp->fw_cap |= BNXT_FW_CAP_DFLT_VLAN_TPID_PCP;
 	if (flags_ext & FUNC_QCAPS_RESP_FLAGS_EXT_BS_V2_SUPPORTED)
 		bp->fw_cap |= BNXT_FW_CAP_BACKING_STORE_V2;
 	if (flags_ext & FUNC_QCAPS_RESP_FLAGS_EXT_TX_COAL_CMPL_CAP)

drivers/net/ethernet/broadcom/bnxt/bnxt.h

@@ -1356,7 +1356,6 @@ struct bnxt_vf_info {
 	u16	vlan;
 	u16	func_qcfg_flags;
 	u32	flags;
-#define BNXT_VF_QOS		0x1
 #define BNXT_VF_SPOOFCHK	0x2
 #define BNXT_VF_LINK_FORCED	0x4
 #define BNXT_VF_LINK_UP		0x8

drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c

@@ -15,6 +15,7 @@
 #include <linux/if_vlan.h>
 #include <linux/interrupt.h>
 #include <linux/etherdevice.h>
+#include <net/dcbnl.h>
 #include "bnxt_hsi.h"
 #include "bnxt.h"
 #include "bnxt_hwrm.h"
@@ -196,11 +197,8 @@ int bnxt_get_vf_config(struct net_device *dev, int vf_id,
 		memcpy(&ivi->mac, vf->vf_mac_addr, ETH_ALEN);
 	ivi->max_tx_rate = vf->max_tx_rate;
 	ivi->min_tx_rate = vf->min_tx_rate;
-	ivi->vlan = vf->vlan;
-	if (vf->flags & BNXT_VF_QOS)
-		ivi->qos = vf->vlan >> VLAN_PRIO_SHIFT;
-	else
-		ivi->qos = 0;
+	ivi->vlan = vf->vlan & VLAN_VID_MASK;
+	ivi->qos = vf->vlan >> VLAN_PRIO_SHIFT;
 	ivi->spoofchk = !!(vf->flags & BNXT_VF_SPOOFCHK);
 	ivi->trusted = bnxt_is_trusted_vf(bp, vf);
 	if (!(vf->flags & BNXT_VF_LINK_FORCED))
@@ -256,21 +254,21 @@ int bnxt_set_vf_vlan(struct net_device *dev, int vf_id, u16 vlan_id, u8 qos,
 	if (bp->hwrm_spec_code < 0x10201)
 		return -ENOTSUPP;
 
-	if (vlan_proto != htons(ETH_P_8021Q))
+	if (vlan_proto != htons(ETH_P_8021Q) &&
+	    (vlan_proto != htons(ETH_P_8021AD) ||
+	     !(bp->fw_cap & BNXT_FW_CAP_DFLT_VLAN_TPID_PCP)))
 		return -EPROTONOSUPPORT;
 
 	rc = bnxt_vf_ndo_prep(bp, vf_id);
 	if (rc)
 		return rc;
 
-	/* TODO: needed to implement proper handling of user priority,
-	 * currently fail the command if there is valid priority
-	 */
-	if (vlan_id > 4095 || qos)
+	if (vlan_id >= VLAN_N_VID || qos >= IEEE_8021Q_MAX_PRIORITIES ||
+	    (!vlan_id && qos))
 		return -EINVAL;
 
 	vf = &bp->pf.vf[vf_id];
-	vlan_tag = vlan_id;
+	vlan_tag = vlan_id | (u16)qos << VLAN_PRIO_SHIFT;
 	if (vlan_tag == vf->vlan)
 		return 0;
 
@@ -279,6 +277,10 @@ int bnxt_set_vf_vlan(struct net_device *dev, int vf_id, u16 vlan_id, u8 qos,
 		req->fid = cpu_to_le16(vf->fw_fid);
 		req->dflt_vlan = cpu_to_le16(vlan_tag);
 		req->enables = cpu_to_le32(FUNC_CFG_REQ_ENABLES_DFLT_VLAN);
+		if (bp->fw_cap & BNXT_FW_CAP_DFLT_VLAN_TPID_PCP) {
+			req->enables |= cpu_to_le32(FUNC_CFG_REQ_ENABLES_TPID);
+			req->tpid = vlan_proto;
+		}
 		rc = hwrm_req_send(bp, req);
 		if (!rc)
 			vf->vlan = vlan_tag;