[dpdk-dev] [PATCH v2 22/57] net/octeontx2: alloc and free TM HW resources

[<jerinj@marvell.com>]

From: Krzysztof Kanas <kkanas@marvell.com>

Allocate and free shaper/scheduler hardware resources for
nodes of hirearchy levels in sw.

Signed-off-by: Krzysztof Kanas <kkanas@marvell.com>
Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
---
 drivers/net/octeontx2/otx2_tm.c | 350 ++++++++++++++++++++++++++++++++
 1 file changed, 350 insertions(+)

diff --git a/drivers/net/octeontx2/otx2_tm.c b/drivers/net/octeontx2/otx2_tm.c
index bc0474242..91f31df05 100644
--- a/drivers/net/octeontx2/otx2_tm.c
+++ b/drivers/net/octeontx2/otx2_tm.c
@@ -54,6 +54,69 @@ nix_tm_node_search(struct otx2_eth_dev *dev,
 	return NULL;
 }
 
+static uint32_t
+check_rr(struct otx2_eth_dev *dev, uint32_t priority, uint32_t parent_id)
+{
+	struct otx2_nix_tm_node *tm_node;
+	uint32_t rr_num = 0;
+
+	TAILQ_FOREACH(tm_node, &dev->node_list, node) {
+		if (!tm_node->parent)
+			continue;
+
+		if (!(tm_node->parent->id == parent_id))
+			continue;
+
+		if (tm_node->priority == priority)
+			rr_num++;
+	}
+	return rr_num;
+}
+
+static int
+nix_tm_update_parent_info(struct otx2_eth_dev *dev)
+{
+	struct otx2_nix_tm_node *tm_node_child;
+	struct otx2_nix_tm_node *tm_node;
+	struct otx2_nix_tm_node *parent;
+	uint32_t rr_num = 0;
+	uint32_t priority;
+
+	TAILQ_FOREACH(tm_node, &dev->node_list, node) {
+		if (!tm_node->parent)
+			continue;
+		/* Count group of children of same priority i.e are RR */
+		parent = tm_node->parent;
+		priority = tm_node->priority;
+		rr_num = check_rr(dev, priority, parent->id);
+
+		/* Assuming that multiple RR groups are
+		 * not configured based on capability.
+		 */
+		if (rr_num > 1) {
+			parent->rr_prio = priority;
+			parent->rr_num = rr_num;
+		}
+
+		/* Find out static priority children that are not in RR */
+		TAILQ_FOREACH(tm_node_child, &dev->node_list, node) {
+			if (!tm_node_child->parent)
+				continue;
+			if (parent->id != tm_node_child->parent->id)
+				continue;
+			if (parent->max_prio == UINT32_MAX &&
+			    tm_node_child->priority != parent->rr_prio)
+				parent->max_prio = 0;
+
+			if (parent->max_prio < tm_node_child->priority &&
+			    parent->rr_prio != tm_node_child->priority)
+				parent->max_prio = tm_node_child->priority;
+		}
+	}
+
+	return 0;
+}
+
 static int
 nix_tm_node_add_to_list(struct otx2_eth_dev *dev, uint32_t node_id,
 			uint32_t parent_node_id, uint32_t priority,
@@ -115,6 +178,274 @@ nix_tm_clear_shaper_profiles(struct otx2_eth_dev *dev)
 	return 0;
 }
 
+static int
+nix_tm_free_resources(struct otx2_eth_dev *dev, uint32_t flags_mask,
+		      uint32_t flags, bool hw_only)
+{
+	struct otx2_nix_tm_shaper_profile *shaper_profile;
+	struct otx2_nix_tm_node *tm_node, *next_node;
+	struct otx2_mbox *mbox = dev->mbox;
+	struct nix_txsch_free_req *req;
+	uint32_t shaper_profile_id;
+	bool skip_node = false;
+	int rc = 0;
+
+	next_node = TAILQ_FIRST(&dev->node_list);
+	while (next_node) {
+		tm_node = next_node;
+		next_node = TAILQ_NEXT(tm_node, node);
+
+		/* Check for only requested nodes */
+		if ((tm_node->flags & flags_mask) != flags)
+			continue;
+
+		if (nix_tm_have_tl1_access(dev) &&
+		    tm_node->hw_lvl_id ==  NIX_TXSCH_LVL_TL1)
+			skip_node = true;
+
+		otx2_tm_dbg("Free hwres for node %u, hwlvl %u, hw_id %u (%p)",
+			    tm_node->id,  tm_node->hw_lvl_id,
+			    tm_node->hw_id, tm_node);
+		/* Free specific HW resource if requested */
+		if (!skip_node && flags_mask &&
+		    tm_node->flags & NIX_TM_NODE_HWRES) {
+			req = otx2_mbox_alloc_msg_nix_txsch_free(mbox);
+			req->flags = 0;
+			req->schq_lvl = tm_node->hw_lvl_id;
+			req->schq = tm_node->hw_id;
+			rc = otx2_mbox_process(mbox);
+			if (rc)
+				break;
+		} else {
+			skip_node = false;
+		}
+		tm_node->flags &= ~NIX_TM_NODE_HWRES;
+
+		/* Leave software elements if needed */
+		if (hw_only)
+			continue;
+
+		shaper_profile_id = tm_node->params.shaper_profile_id;
+		shaper_profile =
+			nix_tm_shaper_profile_search(dev, shaper_profile_id);
+		if (shaper_profile)
+			shaper_profile->reference_count--;
+
+		TAILQ_REMOVE(&dev->node_list, tm_node, node);
+		rte_free(tm_node);
+	}
+
+	if (!flags_mask) {
+		/* Free all hw resources */
+		req = otx2_mbox_alloc_msg_nix_txsch_free(mbox);
+		req->flags = TXSCHQ_FREE_ALL;
+
+		return otx2_mbox_process(mbox);
+	}
+
+	return rc;
+}
+
+static uint8_t
+nix_tm_copy_rsp_to_dev(struct otx2_eth_dev *dev,
+		       struct nix_txsch_alloc_rsp *rsp)
+{
+	uint16_t schq;
+	uint8_t lvl;
+
+	for (lvl = 0; lvl < NIX_TXSCH_LVL_CNT; lvl++) {
+		for (schq = 0; schq < MAX_TXSCHQ_PER_FUNC; schq++) {
+			dev->txschq_list[lvl][schq] = rsp->schq_list[lvl][schq];
+			dev->txschq_contig_list[lvl][schq] =
+				rsp->schq_contig_list[lvl][schq];
+		}
+
+		dev->txschq[lvl] = rsp->schq[lvl];
+		dev->txschq_contig[lvl] = rsp->schq_contig[lvl];
+	}
+	return 0;
+}
+
+static int
+nix_tm_assign_id_to_node(struct otx2_eth_dev *dev,
+			 struct otx2_nix_tm_node *child,
+			 struct otx2_nix_tm_node *parent)
+{
+	uint32_t hw_id, schq_con_index, prio_offset;
+	uint32_t l_id, schq_index;
+
+	otx2_tm_dbg("Assign hw id for child node %u, lvl %u, hw_lvl %u (%p)",
+		    child->id, child->level_id, child->hw_lvl_id, child);
+
+	child->flags |= NIX_TM_NODE_HWRES;
+
+	/* Process root nodes */
+	if (dev->otx2_tm_root_lvl == NIX_TXSCH_LVL_TL2 &&
+	    child->hw_lvl_id == dev->otx2_tm_root_lvl && !parent) {
+		int idx = 0;
+		uint32_t tschq_con_index;
+
+		l_id = child->hw_lvl_id;
+		tschq_con_index = dev->txschq_contig_index[l_id];
+		hw_id = dev->txschq_contig_list[l_id][tschq_con_index];
+		child->hw_id = hw_id;
+		dev->txschq_contig_index[l_id]++;
+		/* Update TL1 hw_id for its parent for config purpose */
+		idx = dev->txschq_index[NIX_TXSCH_LVL_TL1]++;
+		hw_id = dev->txschq_list[NIX_TXSCH_LVL_TL1][idx];
+		child->parent_hw_id = hw_id;
+		return 0;
+	}
+	if (dev->otx2_tm_root_lvl == NIX_TXSCH_LVL_TL1 &&
+	    child->hw_lvl_id == dev->otx2_tm_root_lvl && !parent) {
+		uint32_t tschq_con_index;
+
+		l_id = child->hw_lvl_id;
+		tschq_con_index = dev->txschq_index[l_id];
+		hw_id = dev->txschq_list[l_id][tschq_con_index];
+		child->hw_id = hw_id;
+		dev->txschq_index[l_id]++;
+		return 0;
+	}
+
+	/* Process children with parents */
+	l_id = child->hw_lvl_id;
+	schq_index = dev->txschq_index[l_id];
+	schq_con_index = dev->txschq_contig_index[l_id];
+
+	if (child->priority == parent->rr_prio) {
+		hw_id = dev->txschq_list[l_id][schq_index];
+		child->hw_id = hw_id;
+		child->parent_hw_id = parent->hw_id;
+		dev->txschq_index[l_id]++;
+	} else {
+		prio_offset = schq_con_index + child->priority;
+		hw_id = dev->txschq_contig_list[l_id][prio_offset];
+		child->hw_id = hw_id;
+	}
+	return 0;
+}
+
+static int
+nix_tm_assign_hw_id(struct otx2_eth_dev *dev)
+{
+	struct otx2_nix_tm_node *parent, *child;
+	uint32_t child_hw_lvl, con_index_inc, i;
+
+	for (i = NIX_TXSCH_LVL_TL1; i > 0; i--) {
+		TAILQ_FOREACH(parent, &dev->node_list, node) {
+			child_hw_lvl = parent->hw_lvl_id - 1;
+			if (parent->hw_lvl_id != i)
+				continue;
+			TAILQ_FOREACH(child, &dev->node_list, node) {
+				if (!child->parent)
+					continue;
+				if (child->parent->id != parent->id)
+					continue;
+				nix_tm_assign_id_to_node(dev, child, parent);
+			}
+
+			con_index_inc = parent->max_prio + 1;
+			dev->txschq_contig_index[child_hw_lvl] += con_index_inc;
+
+			/*
+			 * Explicitly assign id to parent node if it
+			 * doesn't have a parent
+			 */
+			if (parent->hw_lvl_id == dev->otx2_tm_root_lvl)
+				nix_tm_assign_id_to_node(dev, parent, NULL);
+		}
+	}
+	return 0;
+}
+
+static uint8_t
+nix_tm_count_req_schq(struct otx2_eth_dev *dev,
+		      struct nix_txsch_alloc_req *req, uint8_t lvl)
+{
+	struct otx2_nix_tm_node *tm_node;
+	uint8_t contig_count;
+
+	TAILQ_FOREACH(tm_node, &dev->node_list, node) {
+		if (lvl == tm_node->hw_lvl_id) {
+			req->schq[lvl - 1] += tm_node->rr_num;
+			if (tm_node->max_prio != UINT32_MAX) {
+				contig_count = tm_node->max_prio + 1;
+				req->schq_contig[lvl - 1] += contig_count;
+			}
+		}
+		if (lvl == dev->otx2_tm_root_lvl &&
+		    dev->otx2_tm_root_lvl && lvl == NIX_TXSCH_LVL_TL2 &&
+		    tm_node->hw_lvl_id == dev->otx2_tm_root_lvl) {
+			req->schq_contig[dev->otx2_tm_root_lvl]++;
+		}
+	}
+
+	req->schq[NIX_TXSCH_LVL_TL1] = 1;
+	req->schq_contig[NIX_TXSCH_LVL_TL1] = 0;
+
+	return 0;
+}
+
+static int
+nix_tm_prepare_txschq_req(struct otx2_eth_dev *dev,
+			  struct nix_txsch_alloc_req *req)
+{
+	uint8_t i;
+
+	for (i = NIX_TXSCH_LVL_TL1; i > 0; i--)
+		nix_tm_count_req_schq(dev, req, i);
+
+	for (i = 0; i < NIX_TXSCH_LVL_CNT; i++) {
+		dev->txschq_index[i] = 0;
+		dev->txschq_contig_index[i] = 0;
+	}
+	return 0;
+}
+
+static int
+nix_tm_send_txsch_alloc_msg(struct otx2_eth_dev *dev)
+{
+	struct otx2_mbox *mbox = dev->mbox;
+	struct nix_txsch_alloc_req *req;
+	struct nix_txsch_alloc_rsp *rsp;
+	int rc;
+
+	req = otx2_mbox_alloc_msg_nix_txsch_alloc(mbox);
+
+	rc = nix_tm_prepare_txschq_req(dev, req);
+	if (rc)
+		return rc;
+
+	rc = otx2_mbox_process_msg(mbox, (void *)&rsp);
+	if (rc)
+		return rc;
+
+	nix_tm_copy_rsp_to_dev(dev, rsp);
+
+	nix_tm_assign_hw_id(dev);
+	return 0;
+}
+
+static int
+nix_tm_alloc_resources(struct rte_eth_dev *eth_dev, bool xmit_enable)
+{
+	struct otx2_eth_dev *dev = otx2_eth_pmd_priv(eth_dev);
+	int rc;
+
+	RTE_SET_USED(xmit_enable);
+
+	nix_tm_update_parent_info(dev);
+
+	rc = nix_tm_send_txsch_alloc_msg(dev);
+	if (rc) {
+		otx2_err("TM failed to alloc tm resources=%d", rc);
+		return rc;
+	}
+
+	return 0;
+}
+
 static int
 nix_tm_prepare_default_tree(struct rte_eth_dev *eth_dev)
 {
@@ -226,6 +557,13 @@ int otx2_nix_tm_init_default(struct rte_eth_dev *eth_dev)
 	uint16_t sq_cnt = eth_dev->data->nb_tx_queues;
 	int rc;
 
+	/* Free up all resources already held */
+	rc = nix_tm_free_resources(dev, 0, 0, false);
+	if (rc) {
+		otx2_err("Failed to freeup existing resources,rc=%d", rc);
+		return rc;
+	}
+
 	/* Clear shaper profiles */
 	nix_tm_clear_shaper_profiles(dev);
 	dev->tm_flags = NIX_TM_DEFAULT_TREE;
@@ -234,6 +572,9 @@ int otx2_nix_tm_init_default(struct rte_eth_dev *eth_dev)
 	if (rc != 0)
 		return rc;
 
+	rc = nix_tm_alloc_resources(eth_dev, false);
+	if (rc != 0)
+		return rc;
 	dev->tm_leaf_cnt = sq_cnt;
 
 	return 0;
@@ -243,6 +584,15 @@ int
 otx2_nix_tm_fini(struct rte_eth_dev *eth_dev)
 {
 	struct otx2_eth_dev *dev = otx2_eth_pmd_priv(eth_dev);
+	int rc;
+
+	/* Xmit is assumed to be disabled */
+	/* Free up resources already held */
+	rc = nix_tm_free_resources(dev, 0, 0, false);
+	if (rc) {
+		otx2_err("Failed to freeup existing resources,rc=%d", rc);
+		return rc;
+	}
 
 	/* Clear shaper profiles */
 	nix_tm_clear_shaper_profiles(dev);
-- 
2.21.0