linux-kernel - [v4, net-next 3/7] bng_en: Handle an HWRM completion request

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Message-ID: <20260105072143.19447-4-bhargava.marreddy@broadcom.com>
Date: Mon,  5 Jan 2026 12:51:39 +0530
From: Bhargava Marreddy <bhargava.marreddy@...adcom.com>
To: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	andrew+netdev@...n.ch,
	horms@...nel.org
Cc: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	michael.chan@...adcom.com,
	pavan.chebbi@...adcom.com,
	vsrama-krishna.nemani@...adcom.com,
	vikas.gupta@...adcom.com,
	Bhargava Marreddy <bhargava.marreddy@...adcom.com>,
	Rajashekar Hudumula <rajashekar.hudumula@...adcom.com>
Subject: [v4, net-next 3/7] bng_en: Handle an HWRM completion request

Since the HWRM completion for a sent request lands on the NQ,
add functions to handle the HWRM completion event.

Signed-off-by: Bhargava Marreddy <bhargava.marreddy@...adcom.com>
Reviewed-by: Vikas Gupta <vikas.gupta@...adcom.com>
Reviewed-by: Rajashekar Hudumula <rajashekar.hudumula@...adcom.com>
---
 .../net/ethernet/broadcom/bnge/bnge_netdev.c  |  3 +-
 .../net/ethernet/broadcom/bnge/bnge_netdev.h  |  1 +
 .../net/ethernet/broadcom/bnge/bnge_txrx.c    | 44 ++++++++++++++++++-
 3 files changed, 45 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c b/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c
index 7533c382714e..ad29c489cc88 100644
--- a/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c
+++ b/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c
@@ -2299,8 +2299,7 @@ static int bnge_open(struct net_device *dev)
 
 static int bnge_shutdown_nic(struct bnge_net *bn)
 {
-	/* TODO: close_path = 0 until we make NAPI functional */
-	bnge_hwrm_resource_free(bn, 0);
+	bnge_hwrm_resource_free(bn, 1);
 	return 0;
 }
 
diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_netdev.h b/drivers/net/ethernet/broadcom/bnge/bnge_netdev.h
index 04989908b133..b5c3284ee0b6 100644
--- a/drivers/net/ethernet/broadcom/bnge/bnge_netdev.h
+++ b/drivers/net/ethernet/broadcom/bnge/bnge_netdev.h
@@ -77,6 +77,7 @@ struct tx_cmp {
 	#define CMPL_BASE_TYPE_HWRM_FWD_REQ			0x22UL
 	#define CMPL_BASE_TYPE_HWRM_FWD_RESP			0x24UL
 	#define CMPL_BASE_TYPE_HWRM_ASYNC_EVENT			0x2eUL
+	#define CMPL_BA_TY_HWRM_ASY_EVT	CMPL_BASE_TYPE_HWRM_ASYNC_EVENT
 	#define TX_CMP_FLAGS_ERROR				(1 << 6)
 	#define TX_CMP_FLAGS_PUSH				(1 << 7)
 	u32 tx_cmp_opaque;
diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_txrx.c b/drivers/net/ethernet/broadcom/bnge/bnge_txrx.c
index db49a92542c0..fb29465f3c72 100644
--- a/drivers/net/ethernet/broadcom/bnge/bnge_txrx.c
+++ b/drivers/net/ethernet/broadcom/bnge/bnge_txrx.c
@@ -390,6 +390,43 @@ static void __bnge_poll_work_done(struct bnge_net *bn, struct bnge_napi *bnapi,
 	}
 }
 
+static void
+bnge_hwrm_update_token(struct bnge_dev *bd, u16 seq_id,
+		       enum bnge_hwrm_wait_state state)
+{
+	struct bnge_hwrm_wait_token *token;
+
+	rcu_read_lock();
+	hlist_for_each_entry_rcu(token, &bd->hwrm_pending_list, node) {
+		if (token->seq_id == seq_id) {
+			WRITE_ONCE(token->state, state);
+			rcu_read_unlock();
+			return;
+		}
+	}
+	rcu_read_unlock();
+	dev_err(bd->dev, "Invalid hwrm seq id %d\n", seq_id);
+}
+
+static int bnge_hwrm_handler(struct bnge_dev *bd, struct tx_cmp *txcmp)
+{
+	struct hwrm_cmpl *h_cmpl = (struct hwrm_cmpl *)txcmp;
+	u16 cmpl_type = TX_CMP_TYPE(txcmp), seq_id;
+
+	switch (cmpl_type) {
+	case CMPL_BASE_TYPE_HWRM_DONE:
+		seq_id = le16_to_cpu(h_cmpl->sequence_id);
+		bnge_hwrm_update_token(bd, seq_id, BNGE_HWRM_COMPLETE);
+		break;
+
+	case CMPL_BASE_TYPE_HWRM_ASYNC_EVENT:
+	default:
+		break;
+	}
+
+	return 0;
+}
+
 static int __bnge_poll_work(struct bnge_net *bn, struct bnge_cp_ring_info *cpr,
 			    int budget)
 {
@@ -440,8 +477,11 @@ static int __bnge_poll_work(struct bnge_net *bn, struct bnge_cp_ring_info *cpr,
 				rx_pkts++;
 			else if (rc == -EBUSY)	/* partial completion */
 				break;
+		} else if (unlikely(cmp_type == CMPL_BASE_TYPE_HWRM_DONE ||
+				    cmp_type == CMPL_BASE_TYPE_HWRM_FWD_REQ ||
+				    cmp_type == CMPL_BA_TY_HWRM_ASY_EVT)) {
+			bnge_hwrm_handler(bn->bd, txcmp);
 		}
-
 		raw_cons = NEXT_RAW_CMP(raw_cons);
 
 		if (rx_pkts && rx_pkts == budget) {
@@ -559,6 +599,8 @@ int bnge_napi_poll(struct napi_struct *napi, int budget)
 			work_done += __bnge_poll_work(bn, cpr,
 						      budget - work_done);
 			nqr->has_more_work |= cpr->has_more_work;
+		} else {
+			bnge_hwrm_handler(bn->bd, (struct tx_cmp *)nqcmp);
 		}
 		raw_cons = NEXT_RAW_CMP(raw_cons);
 	}
-- 
2.47.3