qed: Revise QM cofiguration

Refactor and clean up the queue manager initialization logic.
Also, this adds support for RoC low latency queues, which later
would be used for improving RoCE latency in high throughput scenarios.
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -271,9 +271,14 @@ struct qed_hw_info {
 				 RESC_NUM(_p_hwfn, resc))
 #define FEAT_NUM(_p_hwfn, resc) ((_p_hwfn)->hw_info.feat_num[resc])
 
-	u8				num_tc;
+	/* Amount of traffic classes HW supports */
+	u8 num_hw_tc;
+
+	/* Amount of TCs which should be active according to DCBx or upper
+	 * layer driver configuration.
+	 */
+	u8 num_active_tc;
 	u8				offload_tc;
-	u8				non_offload_tc;
 
 	u32				concrete_fid;
 	u16				opaque_fid;
@@ -336,15 +341,19 @@ struct qed_qm_info {
 	struct init_qm_port_params	*qm_port_params;
 	u16				start_pq;
 	u8				start_vport;
-	u8				pure_lb_pq;
-	u8				offload_pq;
-	u8				pure_ack_pq;
-	u8 ooo_pq;
-	u8				vf_queues_offset;
+	u16				 pure_lb_pq;
+	u16				offload_pq;
+	u16				low_latency_pq;
+	u16				pure_ack_pq;
+	u16				ooo_pq;
+	u16				first_vf_pq;
+	u16				first_mcos_pq;
+	u16				first_rl_pq;
 	u16				num_pqs;
 	u16				num_vf_pqs;
 	u8				num_vports;
 	u8				max_phys_tcs_per_port;
+	u8				ooo_tc;
 	bool				pf_rl_en;
 	bool				pf_wfq_en;
 	bool				vport_rl_en;
@@ -729,9 +738,27 @@ void qed_configure_vp_wfq_on_link_change(struct qed_dev *cdev,
 					 u32 min_pf_rate);
 
 void qed_clean_wfq_db(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
-#define QED_LEADING_HWFN(dev)   (&dev->hwfns[0])
 int qed_device_num_engines(struct qed_dev *cdev);
 
+#define QED_LEADING_HWFN(dev)   (&dev->hwfns[0])
+
+/* Flags for indication of required queues */
+#define PQ_FLAGS_RLS    (BIT(0))
+#define PQ_FLAGS_MCOS   (BIT(1))
+#define PQ_FLAGS_LB     (BIT(2))
+#define PQ_FLAGS_OOO    (BIT(3))
+#define PQ_FLAGS_ACK    (BIT(4))
+#define PQ_FLAGS_OFLD   (BIT(5))
+#define PQ_FLAGS_VFS    (BIT(6))
+#define PQ_FLAGS_LLT    (BIT(7))
+
+/* physical queue index for cm context intialization */
+u16 qed_get_cm_pq_idx(struct qed_hwfn *p_hwfn, u32 pq_flags);
+u16 qed_get_cm_pq_idx_mcos(struct qed_hwfn *p_hwfn, u8 tc);
+u16 qed_get_cm_pq_idx_vf(struct qed_hwfn *p_hwfn, u16 vf);
+
+#define QED_LEADING_HWFN(dev)   (&dev->hwfns[0])
+
 /* Other Linux specific common definitions */
 #define DP_NAME(cdev) ((cdev)->name)
 

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

@@ -1396,18 +1396,11 @@ void qed_qm_init_pf(struct qed_hwfn *p_hwfn)
 }
 
 /* CM PF */
-static int qed_cm_init_pf(struct qed_hwfn *p_hwfn)
+void qed_cm_init_pf(struct qed_hwfn *p_hwfn)
 {
-	union qed_qm_pq_params pq_params;
-	u16 pq;
-
 	/* XCM pure-LB queue */
-	memset(&pq_params, 0, sizeof(pq_params));
-	pq_params.core.tc = LB_TC;
-	pq = qed_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params);
-	STORE_RT_REG(p_hwfn, XCM_REG_CON_PHY_Q3_RT_OFFSET, pq);
-
-	return 0;
+	STORE_RT_REG(p_hwfn, XCM_REG_CON_PHY_Q3_RT_OFFSET,
+		     qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB));
 }
 
 /* DQ PF */

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

@@ -183,7 +183,7 @@ qed_dcbx_dp_protocol(struct qed_hwfn *p_hwfn, struct qed_dcbx_results *p_data)
 			   "%s info: update %d, enable %d, prio %d, tc %d, num_tc %d\n",
 			   qed_dcbx_app_update[i].name, p_data->arr[id].update,
 			   p_data->arr[id].enable, p_data->arr[id].priority,
-			   p_data->arr[id].tc, p_hwfn->hw_info.num_tc);
+			   p_data->arr[id].tc, p_hwfn->hw_info.num_active_tc);
 	}
 }
 
@@ -204,12 +204,8 @@ qed_dcbx_set_params(struct qed_dcbx_results *p_data,
 	p_data->arr[type].tc = tc;
 
 	/* QM reconf data */
-	if (p_info->personality == personality) {
-		if (personality == QED_PCI_ETH)
-			p_info->non_offload_tc = tc;
-		else
-			p_info->offload_tc = tc;
-	}
+	if (p_info->personality == personality)
+		p_info->offload_tc = tc;
 }
 
 /* Update app protocol data and hw_info fields with the TLV info */
@@ -376,7 +372,9 @@ static int qed_dcbx_process_mib_info(struct qed_hwfn *p_hwfn)
 	if (rc)
 		return rc;
 
-	p_info->num_tc = QED_MFW_GET_FIELD(p_ets->flags, DCBX_ETS_MAX_TCS);
+	p_info->num_active_tc = QED_MFW_GET_FIELD(p_ets->flags,
+						  DCBX_ETS_MAX_TCS);
+	p_hwfn->qm_info.ooo_tc = QED_MFW_GET_FIELD(p_ets->flags, DCBX_OOO_TC);
 	data.pf_id = p_hwfn->rel_pf_id;
 	data.dcbx_enabled = !!dcbx_version;
 

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

@@ -241,7 +241,7 @@ qed_sp_fcoe_conn_offload(struct qed_hwfn *p_hwfn,
 	struct fcoe_conn_offload_ramrod_data *p_data;
 	struct qed_spq_entry *p_ent = NULL;
 	struct qed_sp_init_data init_data;
-	u16 pq_id = 0, tmp;
+	u16 physical_q0, tmp;
 	int rc;
 
 	/* Get SPQ entry */
@@ -261,9 +261,9 @@ qed_sp_fcoe_conn_offload(struct qed_hwfn *p_hwfn,
 	p_data = &p_ramrod->offload_ramrod_data;
 
 	/* Transmission PQ is the first of the PF */
-	pq_id = qed_get_qm_pq(p_hwfn, PROTOCOLID_FCOE, NULL);
-	p_conn->physical_q0 = cpu_to_le16(pq_id);
-	p_data->physical_q0 = cpu_to_le16(pq_id);
+	physical_q0 = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
+	p_conn->physical_q0 = cpu_to_le16(physical_q0);
+	p_data->physical_q0 = cpu_to_le16(physical_q0);
 
 	p_data->conn_id = cpu_to_le16(p_conn->conn_id);
 	DMA_REGPAIR_LE(p_data->sq_pbl_addr, p_conn->sq_pbl_addr);

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

@@ -9578,12 +9578,12 @@ struct dcbx_ets_feature {
 #define DCBX_ETS_CBS_SHIFT	3
 #define DCBX_ETS_MAX_TCS_MASK	0x000000f0
 #define DCBX_ETS_MAX_TCS_SHIFT	4
-#define DCBX_ISCSI_OOO_TC_MASK	0x00000f00
-#define DCBX_ISCSI_OOO_TC_SHIFT	8
+#define DCBX_OOO_TC_MASK	0x00000f00
+#define DCBX_OOO_TC_SHIFT	8
 	u32 pri_tc_tbl[1];
-#define DCBX_ISCSI_OOO_TC	(4)
+#define DCBX_TCP_OOO_TC		(4)
 
-#define NIG_ETS_ISCSI_OOO_CLIENT_OFFSET	(DCBX_ISCSI_OOO_TC + 1)
+#define NIG_ETS_ISCSI_OOO_CLIENT_OFFSET	(DCBX_TCP_OOO_TC + 1)
 #define DCBX_CEE_STRICT_PRIORITY	0xf
 	u32 tc_bw_tbl[2];
 	u32 tc_tsa_tbl[2];
@@ -9592,6 +9592,9 @@ struct dcbx_ets_feature {
 #define DCBX_ETS_TSA_ETS	2
 };
 
+#define DCBX_TCP_OOO_TC			(4)
+#define DCBX_TCP_OOO_K2_4PORT_TC	(3)
+
 struct dcbx_app_priority_entry {
 	u32 entry;
 #define DCBX_APP_PRI_MAP_MASK		0x000000ff

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

@@ -800,55 +800,3 @@ int qed_dmae_host2host(struct qed_hwfn *p_hwfn,
 	return rc;
 }
 
-u16 qed_get_qm_pq(struct qed_hwfn *p_hwfn,
-		  enum protocol_type proto, union qed_qm_pq_params *p_params)
-{
-	u16 pq_id = 0;
-
-	if ((proto == PROTOCOLID_CORE ||
-	     proto == PROTOCOLID_ETH ||
-	     proto == PROTOCOLID_ISCSI ||
-	     proto == PROTOCOLID_ROCE) && !p_params) {
-		DP_NOTICE(p_hwfn,
-			  "Protocol %d received NULL PQ params\n", proto);
-		return 0;
-	}
-
-	switch (proto) {
-	case PROTOCOLID_CORE:
-		if (p_params->core.tc == LB_TC)
-			pq_id = p_hwfn->qm_info.pure_lb_pq;
-		else if (p_params->core.tc == OOO_LB_TC)
-			pq_id = p_hwfn->qm_info.ooo_pq;
-		else
-			pq_id = p_hwfn->qm_info.offload_pq;
-		break;
-	case PROTOCOLID_ETH:
-		pq_id = p_params->eth.tc;
-		if (p_params->eth.is_vf)
-			pq_id += p_hwfn->qm_info.vf_queues_offset +
-				 p_params->eth.vf_id;
-		break;
-	case PROTOCOLID_ISCSI:
-		if (p_params->iscsi.q_idx == 1)
-			pq_id = p_hwfn->qm_info.pure_ack_pq;
-		break;
-	case PROTOCOLID_ROCE:
-		if (p_params->roce.dcqcn)
-			pq_id = p_params->roce.qpid;
-		else
-			pq_id = p_hwfn->qm_info.offload_pq;
-		if (pq_id > p_hwfn->qm_info.num_pf_rls)
-			pq_id = p_hwfn->qm_info.offload_pq;
-		break;
-	case PROTOCOLID_FCOE:
-		pq_id = p_hwfn->qm_info.offload_pq;
-		break;
-	default:
-		pq_id = 0;
-	}
-
-	pq_id = CM_TX_PQ_BASE + pq_id + RESC_START(p_hwfn, QED_PQ);
-
-	return pq_id;
-}

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

@@ -297,9 +297,6 @@ union qed_qm_pq_params {
 	} roce;
 };
 
-u16 qed_get_qm_pq(struct qed_hwfn *p_hwfn,
-		  enum protocol_type proto, union qed_qm_pq_params *params);
-
 int qed_init_fw_data(struct qed_dev *cdev,
 		     const u8 *fw_data);
 #endif

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

@@ -2500,8 +2500,9 @@ void qed_int_cau_conf_sb(struct qed_hwfn *p_hwfn,
 
 	/* Configure pi coalescing if set */
 	if (p_hwfn->cdev->int_coalescing_mode == QED_COAL_MODE_ENABLE) {
+		u8 num_tc = p_hwfn->hw_info.num_hw_tc;
 		u8 timeset, timer_res;
-		u8 num_tc = 1, i;
+		u8 i;
 
 		/* timeset = (coalesce >> timer-res), timeset is 7bit wide */
 		if (p_hwfn->cdev->rx_coalesce_usecs <= 0x7F)

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

@@ -270,11 +270,10 @@ static int qed_sp_iscsi_conn_offload(struct qed_hwfn *p_hwfn,
 	struct tcp_offload_params *p_tcp = NULL;
 	struct qed_spq_entry *p_ent = NULL;
 	struct qed_sp_init_data init_data;
-	union qed_qm_pq_params pq_params;
-	u16 pq0_id = 0, pq1_id = 0;
 	dma_addr_t r2tq_pbl_addr;
 	dma_addr_t xhq_pbl_addr;
 	dma_addr_t uhq_pbl_addr;
+	u16 physical_q;
 	int rc = 0;
 	u32 dval;
 	u16 wval;
@@ -297,16 +296,14 @@ static int qed_sp_iscsi_conn_offload(struct qed_hwfn *p_hwfn,
 	p_ramrod = &p_ent->ramrod.iscsi_conn_offload;
 
 	/* Transmission PQ is the first of the PF */
-	memset(&pq_params, 0, sizeof(pq_params));
-	pq0_id = qed_get_qm_pq(p_hwfn, PROTOCOLID_ISCSI, &pq_params);
-	p_conn->physical_q0 = cpu_to_le16(pq0_id);
-	p_ramrod->iscsi.physical_q0 = cpu_to_le16(pq0_id);
+	physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
+	p_conn->physical_q0 = cpu_to_le16(physical_q);
+	p_ramrod->iscsi.physical_q0 = cpu_to_le16(physical_q);
 
 	/* iSCSI Pure-ACK PQ */
-	pq_params.iscsi.q_idx = 1;
-	pq1_id = qed_get_qm_pq(p_hwfn, PROTOCOLID_ISCSI, &pq_params);
-	p_conn->physical_q1 = cpu_to_le16(pq1_id);
-	p_ramrod->iscsi.physical_q1 = cpu_to_le16(pq1_id);
+	physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
+	p_conn->physical_q1 = cpu_to_le16(physical_q);
+	p_ramrod->iscsi.physical_q1 = cpu_to_le16(physical_q);
 
 	p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_OFFLOAD_CONN;
 	SET_FIELD(p_ramrod->hdr.flags, ISCSI_SLOW_PATH_HDR_LAYER_CODE,

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

@@ -938,15 +938,12 @@ qed_eth_pf_tx_queue_start(struct qed_hwfn *p_hwfn,
 			  dma_addr_t pbl_addr,
 			  u16 pbl_size, void __iomem **pp_doorbell)
 {
-	union qed_qm_pq_params pq_params;
 	int rc;
 
-	memset(&pq_params, 0, sizeof(pq_params));
 
 	rc = qed_eth_txq_start_ramrod(p_hwfn, p_cid,
 				      pbl_addr, pbl_size,
-				      qed_get_qm_pq(p_hwfn, PROTOCOLID_ETH,
-						    &pq_params));
+				      qed_get_cm_pq_idx_mcos(p_hwfn, tc));
 	if (rc)
 		return rc;
 

drivers/net/ethernet/qlogic/qed/qed_ll2.c

@@ -1090,7 +1090,6 @@ static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
 	struct core_tx_start_ramrod_data *p_ramrod = NULL;
 	struct qed_spq_entry *p_ent = NULL;
 	struct qed_sp_init_data init_data;
-	union qed_qm_pq_params pq_params;
 	u16 pq_id = 0, pbl_size;
 	int rc = -EINVAL;
 
@@ -1127,9 +1126,17 @@ static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
 	pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain);
 	p_ramrod->pbl_size = cpu_to_le16(pbl_size);
 
-	memset(&pq_params, 0, sizeof(pq_params));
-	pq_params.core.tc = p_ll2_conn->conn.tx_tc;
-	pq_id = qed_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params);
+	switch (p_ll2_conn->conn.tx_tc) {
+	case LB_TC:
+		pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
+		break;
+	case OOO_LB_TC:
+		pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO);
+	default:
+		pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
+		break;
+	}
+
 	p_ramrod->qm_pq_id = cpu_to_le16(pq_id);
 
 	switch (conn_type) {

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

@@ -1224,7 +1224,6 @@ static int qed_roce_sp_create_responder(struct qed_hwfn *p_hwfn,
 {
 	struct roce_create_qp_resp_ramrod_data *p_ramrod;
 	struct qed_sp_init_data init_data;
-	union qed_qm_pq_params qm_params;
 	enum roce_flavor roce_flavor;
 	struct qed_spq_entry *p_ent;
 	u16 regular_latency_queue;
@@ -1313,10 +1312,7 @@ static int qed_roce_sp_create_responder(struct qed_hwfn *p_hwfn,
 	p_ramrod->cq_cid = cpu_to_le32((p_hwfn->hw_info.opaque_fid << 16) |
 				       qp->rq_cq_id);
 
-	memset(&qm_params, 0, sizeof(qm_params));
-	qm_params.roce.qpid = qp->icid >> 1;
-	regular_latency_queue = qed_get_qm_pq(p_hwfn, PROTOCOLID_ROCE,
-					      &qm_params);
+	regular_latency_queue = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
 
 	p_ramrod->regular_latency_phy_queue =
 	    cpu_to_le16(regular_latency_queue);
@@ -1368,7 +1364,6 @@ static int qed_roce_sp_create_requester(struct qed_hwfn *p_hwfn,
 {
 	struct roce_create_qp_req_ramrod_data *p_ramrod;
 	struct qed_sp_init_data init_data;
-	union qed_qm_pq_params qm_params;
 	enum roce_flavor roce_flavor;
 	struct qed_spq_entry *p_ent;
 	u16 regular_latency_queue;
@@ -1446,10 +1441,7 @@ static int qed_roce_sp_create_requester(struct qed_hwfn *p_hwfn,
 	p_ramrod->cq_cid =
 	    cpu_to_le32((p_hwfn->hw_info.opaque_fid << 16) | qp->sq_cq_id);
 
-	memset(&qm_params, 0, sizeof(qm_params));
-	qm_params.roce.qpid = qp->icid >> 1;
-	regular_latency_queue = qed_get_qm_pq(p_hwfn, PROTOCOLID_ROCE,
-					      &qm_params);
+	regular_latency_queue = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
 
 	p_ramrod->regular_latency_phy_queue =
 	    cpu_to_le16(regular_latency_queue);

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

@@ -205,11 +205,10 @@ static int qed_spq_fill_entry(struct qed_hwfn *p_hwfn,
 static void qed_spq_hw_initialize(struct qed_hwfn *p_hwfn,
 				  struct qed_spq *p_spq)
 {
-	u16				pq;
-	struct qed_cxt_info		cxt_info;
-	struct core_conn_context	*p_cxt;
-	union qed_qm_pq_params		pq_params;
-	int				rc;
+	struct core_conn_context *p_cxt;
+	struct qed_cxt_info cxt_info;
+	u16 physical_q;
+	int rc;
 
 	cxt_info.iid = p_spq->cid;
 
@@ -231,10 +230,8 @@ static void qed_spq_hw_initialize(struct qed_hwfn *p_hwfn,
 		  XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1);
 
 	/* QM physical queue */
-	memset(&pq_params, 0, sizeof(pq_params));
-	pq_params.core.tc = LB_TC;
-	pq = qed_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params);
-	p_cxt->xstorm_ag_context.physical_q0 = cpu_to_le16(pq);
+	physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
+	p_cxt->xstorm_ag_context.physical_q0 = cpu_to_le16(physical_q);
 
 	p_cxt->xstorm_st_context.spq_base_lo =
 		DMA_LO_LE(p_spq->chain.p_phys_addr);

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

@@ -2066,17 +2066,11 @@ static void qed_iov_vf_mbx_start_txq(struct qed_hwfn *p_hwfn,
 	struct qed_queue_start_common_params params;
 	struct qed_iov_vf_mbx *mbx = &vf->vf_mbx;
 	u8 status = PFVF_STATUS_NO_RESOURCE;
-	union qed_qm_pq_params pq_params;
 	struct vfpf_start_txq_tlv *req;
 	struct qed_vf_q_info *p_queue;
 	int rc;
 	u16 pq;
 
-	/* Prepare the parameters which would choose the right PQ */
-	memset(&pq_params, 0, sizeof(pq_params));
-	pq_params.eth.is_vf = 1;
-	pq_params.eth.vf_id = vf->relative_vf_id;
-
 	memset(&params, 0, sizeof(params));
 	req = &mbx->req_virt->start_txq;
 
@@ -2101,7 +2095,7 @@ static void qed_iov_vf_mbx_start_txq(struct qed_hwfn *p_hwfn,
 	if (!p_queue->p_tx_cid)
 		goto out;
 
-	pq = qed_get_qm_pq(p_hwfn, PROTOCOLID_ETH, &pq_params);
+	pq = qed_get_cm_pq_idx_vf(p_hwfn, vf->relative_vf_id);
 	rc = qed_eth_txq_start_ramrod(p_hwfn, p_queue->p_tx_cid,
 				      req->pbl_addr, req->pbl_size, pq);
 	if (rc) {