qed: Add support for multi function mode with 802.1ad tagging.

The patch adds support for new Multi function mode wherein the traffic
classification is done based on the 802.1ad tagging and the outer vlan tag
provided by the management firmware.

Signed-off-by: Sudarsana Reddy Kalluru <[email protected]>
Signed-off-by: Ariel Elior <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Sudarsana Reddy Kalluru

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

@@ -1668,6 +1668,18 @@ int qed_hw_init(struct qed_dev *cdev, struct qed_hw_init_params *p_params)
 		if (rc)
 			return rc;
 
+		if (IS_PF(cdev) && test_bit(QED_MF_8021AD_TAGGING,
+					    &cdev->mf_bits)) {
+			STORE_RT_REG(p_hwfn, PRS_REG_TAG_ETHERTYPE_0_RT_OFFSET,
+				     ETH_P_8021AD);
+			STORE_RT_REG(p_hwfn, NIG_REG_TAG_ETHERTYPE_0_RT_OFFSET,
+				     ETH_P_8021AD);
+			STORE_RT_REG(p_hwfn, PBF_REG_TAG_ETHERTYPE_0_RT_OFFSET,
+				     ETH_P_8021AD);
+			STORE_RT_REG(p_hwfn, DORQ_REG_TAG1_ETHERTYPE_RT_OFFSET,
+				     ETH_P_8021AD);
+		}
+
 		qed_fill_load_req_params(&load_req_params,
 					 p_params->p_drv_load_params);
 		rc = qed_mcp_load_req(p_hwfn, p_hwfn->p_main_ptt,
@@ -2630,39 +2642,51 @@ static int qed_hw_get_nvm_info(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 		   link->pause.autoneg,
 		   p_caps->default_eee, p_caps->eee_lpi_timer);
 
-	/* Read Multi-function information from shmem */
-	addr = MCP_REG_SCRATCH + nvm_cfg1_offset +
-	       offsetof(struct nvm_cfg1, glob) +
-	       offsetof(struct nvm_cfg1_glob, generic_cont0);
+	if (IS_LEAD_HWFN(p_hwfn)) {
+		struct qed_dev *cdev = p_hwfn->cdev;
 
-	generic_cont0 = qed_rd(p_hwfn, p_ptt, addr);
+		/* Read Multi-function information from shmem */
+		addr = MCP_REG_SCRATCH + nvm_cfg1_offset +
+		       offsetof(struct nvm_cfg1, glob) +
+		       offsetof(struct nvm_cfg1_glob, generic_cont0);
 
-	mf_mode = (generic_cont0 & NVM_CFG1_GLOB_MF_MODE_MASK) >>
-		  NVM_CFG1_GLOB_MF_MODE_OFFSET;
+		generic_cont0 = qed_rd(p_hwfn, p_ptt, addr);
 
-	switch (mf_mode) {
-	case NVM_CFG1_GLOB_MF_MODE_MF_ALLOWED:
-		p_hwfn->cdev->mf_bits = BIT(QED_MF_OVLAN_CLSS);
-		break;
-	case NVM_CFG1_GLOB_MF_MODE_NPAR1_0:
-		p_hwfn->cdev->mf_bits = BIT(QED_MF_LLH_MAC_CLSS) |
+		mf_mode = (generic_cont0 & NVM_CFG1_GLOB_MF_MODE_MASK) >>
+			  NVM_CFG1_GLOB_MF_MODE_OFFSET;
+
+		switch (mf_mode) {
+		case NVM_CFG1_GLOB_MF_MODE_MF_ALLOWED:
+			cdev->mf_bits = BIT(QED_MF_OVLAN_CLSS);
+			break;
+		case NVM_CFG1_GLOB_MF_MODE_BD:
+			cdev->mf_bits = BIT(QED_MF_OVLAN_CLSS) |
+					BIT(QED_MF_LLH_PROTO_CLSS) |
+					BIT(QED_MF_8021AD_TAGGING);
+			break;
+		case NVM_CFG1_GLOB_MF_MODE_NPAR1_0:
+			cdev->mf_bits = BIT(QED_MF_LLH_MAC_CLSS) |
 					BIT(QED_MF_LLH_PROTO_CLSS) |
 					BIT(QED_MF_LL2_NON_UNICAST) |
 					BIT(QED_MF_INTER_PF_SWITCH);
-		break;
-	case NVM_CFG1_GLOB_MF_MODE_DEFAULT:
-		p_hwfn->cdev->mf_bits = BIT(QED_MF_LLH_MAC_CLSS) |
+			break;
+		case NVM_CFG1_GLOB_MF_MODE_DEFAULT:
+			cdev->mf_bits = BIT(QED_MF_LLH_MAC_CLSS) |
 					BIT(QED_MF_LLH_PROTO_CLSS) |
 					BIT(QED_MF_LL2_NON_UNICAST);
-		if (QED_IS_BB(p_hwfn->cdev))
-			p_hwfn->cdev->mf_bits |= BIT(QED_MF_NEED_DEF_PF);
-		break;
+			if (QED_IS_BB(p_hwfn->cdev))
+				cdev->mf_bits |= BIT(QED_MF_NEED_DEF_PF);
+			break;
+		}
+
+		DP_INFO(p_hwfn, "Multi function mode is 0x%lx\n",
+			cdev->mf_bits);
 	}
 
 	DP_INFO(p_hwfn, "Multi function mode is 0x%lx\n",
 		p_hwfn->cdev->mf_bits);
 
-	/* Read Multi-function information from shmem */
+	/* Read device capabilities information from shmem */
 	addr = MCP_REG_SCRATCH + nvm_cfg1_offset +
 		offsetof(struct nvm_cfg1, glob) +
 		offsetof(struct nvm_cfg1_glob, device_capabilities);

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

@@ -346,6 +346,11 @@ int qed_sp_pf_start(struct qed_hwfn *p_hwfn,
 
 	p_ramrod->outer_tag_config.outer_tag.tci =
 		cpu_to_le16(p_hwfn->hw_info.ovlan);
+	if (test_bit(QED_MF_8021AD_TAGGING, &p_hwfn->cdev->mf_bits)) {
+		p_ramrod->outer_tag_config.outer_tag.tpid = ETH_P_8021AD;
+		p_ramrod->outer_tag_config.enable_stag_pri_change = 1;
+	}
+
 
 	/* Place EQ address in RAMROD */
 	DMA_REGPAIR_LE(p_ramrod->event_ring_pbl_addr,