Merge branch 'qed-next'

Yuval Basson says:

====================
qed: Add xrc core support for RoCE

This patch adds support for configuring XRC and provides the necessary
APIs for rdma upper layer driver (qedr) to enable the XRC feature.
====================

Signed-off-by: David S. Miller <[email protected]>

Author: davem330

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

@@ -110,6 +110,7 @@ struct src_ent {
 	ALIGNED_TYPE_SIZE(union conn_context, p_hwfn)
 
 #define SRQ_CXT_SIZE (sizeof(struct rdma_srq_context))
+#define XRC_SRQ_CXT_SIZE (sizeof(struct rdma_xrc_srq_context))
 
 #define TYPE0_TASK_CXT_SIZE(p_hwfn) \
 	ALIGNED_TYPE_SIZE(union type0_task_context, p_hwfn)
@@ -293,18 +294,40 @@ static struct qed_tid_seg *qed_cxt_tid_seg_info(struct qed_hwfn *p_hwfn,
 	return NULL;
 }
 
-static void qed_cxt_set_srq_count(struct qed_hwfn *p_hwfn, u32 num_srqs)
+static void qed_cxt_set_srq_count(struct qed_hwfn *p_hwfn,
+				  u32 num_srqs, u32 num_xrc_srqs)
 {
 	struct qed_cxt_mngr *p_mgr = p_hwfn->p_cxt_mngr;
 
 	p_mgr->srq_count = num_srqs;
+	p_mgr->xrc_srq_count = num_xrc_srqs;
 }
 
-u32 qed_cxt_get_srq_count(struct qed_hwfn *p_hwfn)
+u32 qed_cxt_get_ilt_page_size(struct qed_hwfn *p_hwfn,
+			      enum ilt_clients ilt_client)
+{
+	struct qed_cxt_mngr *p_mngr = p_hwfn->p_cxt_mngr;
+	struct qed_ilt_client_cfg *p_cli = &p_mngr->clients[ilt_client];
+
+	return ILT_PAGE_IN_BYTES(p_cli->p_size.val);
+}
+
+static u32 qed_cxt_xrc_srqs_per_page(struct qed_hwfn *p_hwfn)
+{
+	u32 page_size;
+
+	page_size = qed_cxt_get_ilt_page_size(p_hwfn, ILT_CLI_TSDM);
+	return page_size / XRC_SRQ_CXT_SIZE;
+}
+
+u32 qed_cxt_get_total_srq_count(struct qed_hwfn *p_hwfn)
 {
 	struct qed_cxt_mngr *p_mgr = p_hwfn->p_cxt_mngr;
+	u32 total_srqs;
+
+	total_srqs = p_mgr->srq_count + p_mgr->xrc_srq_count;
 
-	return p_mgr->srq_count;
+	return total_srqs;
 }
 
 /* set the iids count per protocol */
@@ -692,7 +715,7 @@ int qed_cxt_cfg_ilt_compute(struct qed_hwfn *p_hwfn, u32 *line_count)
 	}
 
 	/* TSDM (SRQ CONTEXT) */
-	total = qed_cxt_get_srq_count(p_hwfn);
+	total = qed_cxt_get_total_srq_count(p_hwfn);
 
 	if (total) {
 		p_cli = qed_cxt_set_cli(&p_mngr->clients[ILT_CLI_TSDM]);
@@ -1962,11 +1985,9 @@ static void qed_rdma_set_pf_params(struct qed_hwfn *p_hwfn,
 				   struct qed_rdma_pf_params *p_params,
 				   u32 num_tasks)
 {
-	u32 num_cons, num_qps, num_srqs;
+	u32 num_cons, num_qps;
 	enum protocol_type proto;
 
-	num_srqs = min_t(u32, QED_RDMA_MAX_SRQS, p_params->num_srqs);
-
 	if (p_hwfn->mcp_info->func_info.protocol == QED_PCI_ETH_RDMA) {
 		DP_NOTICE(p_hwfn,
 			  "Current day drivers don't support RoCE & iWARP simultaneously on the same PF. Default to RoCE-only\n");
@@ -1989,6 +2010,8 @@ static void qed_rdma_set_pf_params(struct qed_hwfn *p_hwfn,
 	}
 
 	if (num_cons && num_tasks) {
+		u32 num_srqs, num_xrc_srqs;
+
 		qed_cxt_set_proto_cid_count(p_hwfn, proto, num_cons, 0);
 
 		/* Deliberatly passing ROCE for tasks id. This is because
@@ -1997,7 +2020,13 @@ static void qed_rdma_set_pf_params(struct qed_hwfn *p_hwfn,
 		qed_cxt_set_proto_tid_count(p_hwfn, PROTOCOLID_ROCE,
 					    QED_CXT_ROCE_TID_SEG, 1,
 					    num_tasks, false);
-		qed_cxt_set_srq_count(p_hwfn, num_srqs);
+
+		num_srqs = min_t(u32, QED_RDMA_MAX_SRQS, p_params->num_srqs);
+
+		/* XRC SRQs populate a single ILT page */
+		num_xrc_srqs = qed_cxt_xrc_srqs_per_page(p_hwfn);
+
+		qed_cxt_set_srq_count(p_hwfn, num_srqs, num_xrc_srqs);
 	} else {
 		DP_INFO(p_hwfn->cdev,
 			"RDMA personality used without setting params!\n");
@@ -2163,10 +2192,17 @@ qed_cxt_dynamic_ilt_alloc(struct qed_hwfn *p_hwfn,
 		p_blk = &p_cli->pf_blks[CDUC_BLK];
 		break;
 	case QED_ELEM_SRQ:
+		/* The first ILT page is not used for regular SRQs. Skip it. */
+		iid += p_hwfn->p_cxt_mngr->xrc_srq_count;
 		p_cli = &p_hwfn->p_cxt_mngr->clients[ILT_CLI_TSDM];
 		elem_size = SRQ_CXT_SIZE;
 		p_blk = &p_cli->pf_blks[SRQ_BLK];
 		break;
+	case QED_ELEM_XRC_SRQ:
+		p_cli = &p_hwfn->p_cxt_mngr->clients[ILT_CLI_TSDM];
+		elem_size = XRC_SRQ_CXT_SIZE;
+		p_blk = &p_cli->pf_blks[SRQ_BLK];
+		break;
 	case QED_ELEM_TASK:
 		p_cli = &p_hwfn->p_cxt_mngr->clients[ILT_CLI_CDUT];
 		elem_size = TYPE1_TASK_CXT_SIZE(p_hwfn);
@@ -2386,8 +2422,12 @@ int qed_cxt_free_proto_ilt(struct qed_hwfn *p_hwfn, enum protocol_type proto)
 		return rc;
 
 	/* Free TSDM CXT */
-	rc = qed_cxt_free_ilt_range(p_hwfn, QED_ELEM_SRQ, 0,
-				    qed_cxt_get_srq_count(p_hwfn));
+	rc = qed_cxt_free_ilt_range(p_hwfn, QED_ELEM_XRC_SRQ, 0,
+				    p_hwfn->p_cxt_mngr->xrc_srq_count);
+
+	rc = qed_cxt_free_ilt_range(p_hwfn, QED_ELEM_SRQ,
+				    p_hwfn->p_cxt_mngr->xrc_srq_count,
+				    p_hwfn->p_cxt_mngr->srq_count);
 
 	return rc;
 }

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

@@ -82,7 +82,8 @@ int qed_cxt_get_tid_mem_info(struct qed_hwfn *p_hwfn,
 enum qed_cxt_elem_type {
 	QED_ELEM_CXT,
 	QED_ELEM_SRQ,
-	QED_ELEM_TASK
+	QED_ELEM_TASK,
+	QED_ELEM_XRC_SRQ,
 };
 
 u32 qed_cxt_get_proto_cid_count(struct qed_hwfn *p_hwfn,
@@ -235,7 +236,6 @@ u32 qed_cxt_get_proto_tid_count(struct qed_hwfn *p_hwfn,
 				enum protocol_type type);
 u32 qed_cxt_get_proto_cid_start(struct qed_hwfn *p_hwfn,
 				enum protocol_type type);
-u32 qed_cxt_get_srq_count(struct qed_hwfn *p_hwfn);
 int qed_cxt_free_proto_ilt(struct qed_hwfn *p_hwfn, enum protocol_type proto);
 
 #define QED_CTX_WORKING_MEM 0
@@ -358,6 +358,7 @@ struct qed_cxt_mngr {
 
 	/* total number of SRQ's for this hwfn */
 	u32 srq_count;
+	u32 xrc_srq_count;
 
 	/* Maximal number of L2 steering filters */
 	u32 arfs_count;
@@ -372,4 +373,9 @@ u16 qed_get_cdut_num_vf_init_pages(struct qed_hwfn *p_hwfn);
 u16 qed_get_cdut_num_pf_work_pages(struct qed_hwfn *p_hwfn);
 u16 qed_get_cdut_num_vf_work_pages(struct qed_hwfn *p_hwfn);
 
+u32 qed_cxt_get_ilt_page_size(struct qed_hwfn *p_hwfn,
+			      enum ilt_clients ilt_client);
+
+u32 qed_cxt_get_total_srq_count(struct qed_hwfn *p_hwfn);
+
 #endif

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

@@ -2269,6 +2269,7 @@ int qed_resc_alloc(struct qed_dev *cdev)
 		/* EQ */
 		n_eqes = qed_chain_get_capacity(&p_hwfn->p_spq->chain);
 		if (QED_IS_RDMA_PERSONALITY(p_hwfn)) {
+			u32 n_srq = qed_cxt_get_total_srq_count(p_hwfn);
 			enum protocol_type rdma_proto;
 
 			if (QED_IS_ROCE_PERSONALITY(p_hwfn))
@@ -2279,7 +2280,10 @@ int qed_resc_alloc(struct qed_dev *cdev)
 			num_cons = qed_cxt_get_proto_cid_count(p_hwfn,
 							       rdma_proto,
 							       NULL) * 2;
-			n_eqes += num_cons + 2 * MAX_NUM_VFS_BB;
+			/* EQ should be able to get events from all SRQ's
+			 * at the same time
+			 */
+			n_eqes += num_cons + 2 * MAX_NUM_VFS_BB + n_srq;
 		} else if (p_hwfn->hw_info.personality == QED_PCI_ISCSI) {
 			num_cons =
 			    qed_cxt_get_proto_cid_count(p_hwfn,