linux-kernel - [PATCH net-next v26 04/13] rtase: Implement the interrupt routine and rtase

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Message-ID: <20240807033723.485207-5-justinlai0215@realtek.com>
Date: Wed, 7 Aug 2024 11:37:14 +0800
From: Justin Lai <justinlai0215@...ltek.com>
To: <kuba@...nel.org>
CC: <davem@...emloft.net>, <edumazet@...gle.com>, <pabeni@...hat.com>,
        <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <andrew@...n.ch>, <jiri@...nulli.us>, <horms@...nel.org>,
        <rkannoth@...vell.com>, <jdamato@...tly.com>, <pkshih@...ltek.com>,
        <larry.chiu@...ltek.com>, "Justin
 Lai" <justinlai0215@...ltek.com>
Subject: [PATCH net-next v26 04/13] rtase: Implement the interrupt routine and rtase_poll

1. Implement rtase_interrupt to handle txQ0/rxQ0, txQ4~txQ7 interrupts,
and implement rtase_q_interrupt to handle txQ1/rxQ1, txQ2/rxQ2 and
txQ3/rxQ3 interrupts.
2. Implement rtase_poll to call ring_handler to process the tx or
rx packet of each ring. If the returned value is budget,it means that
there is still work of a certain ring that has not yet been completed.

Signed-off-by: Justin Lai <justinlai0215@...ltek.com>
---
 .../net/ethernet/realtek/rtase/rtase_main.c   | 69 +++++++++++++++++++
 1 file changed, 69 insertions(+)

diff --git a/drivers/net/ethernet/realtek/rtase/rtase_main.c b/drivers/net/ethernet/realtek/rtase/rtase_main.c
index da795570e9ac..17bf3927989d 100644
--- a/drivers/net/ethernet/realtek/rtase/rtase_main.c
+++ b/drivers/net/ethernet/realtek/rtase/rtase_main.c
@@ -569,6 +569,75 @@ static void rtase_hw_start(const struct net_device *dev)
 	rtase_enable_hw_interrupt(tp);
 }
 
+/*  the interrupt handler does RXQ0 and TXQ0, TXQ4~7 interrutp status
+ */
+static irqreturn_t rtase_interrupt(int irq, void *dev_instance)
+{
+	const struct rtase_private *tp;
+	struct rtase_int_vector *ivec;
+	u32 status;
+
+	ivec = dev_instance;
+	tp = ivec->tp;
+	status = rtase_r32(tp, ivec->isr_addr);
+
+	rtase_w32(tp, ivec->imr_addr, 0x0);
+	rtase_w32(tp, ivec->isr_addr, status & ~RTASE_FOVW);
+
+	if (napi_schedule_prep(&ivec->napi))
+		__napi_schedule(&ivec->napi);
+
+	return IRQ_HANDLED;
+}
+
+/*  the interrupt handler does RXQ1&TXQ1 or RXQ2&TXQ2 or RXQ3&TXQ3 interrupt
+ *  status according to interrupt vector
+ */
+static irqreturn_t rtase_q_interrupt(int irq, void *dev_instance)
+{
+	const struct rtase_private *tp;
+	struct rtase_int_vector *ivec;
+	u16 status;
+
+	ivec = dev_instance;
+	tp = ivec->tp;
+	status = rtase_r16(tp, ivec->isr_addr);
+
+	rtase_w16(tp, ivec->imr_addr, 0x0);
+	rtase_w16(tp, ivec->isr_addr, status);
+
+	if (napi_schedule_prep(&ivec->napi))
+		__napi_schedule(&ivec->napi);
+
+	return IRQ_HANDLED;
+}
+
+static int rtase_poll(struct napi_struct *napi, int budget)
+{
+	const struct rtase_int_vector *ivec;
+	const struct rtase_private *tp;
+	struct rtase_ring *ring;
+	int total_workdone = 0;
+
+	ivec = container_of(napi, struct rtase_int_vector, napi);
+	tp = ivec->tp;
+
+	list_for_each_entry(ring, &ivec->ring_list, ring_entry)
+		total_workdone += ring->ring_handler(ring, budget);
+
+	if (total_workdone >= budget)
+		return budget;
+
+	if (napi_complete_done(napi, total_workdone)) {
+		if (!ivec->index)
+			rtase_w32(tp, ivec->imr_addr, ivec->imr);
+		else
+			rtase_w16(tp, ivec->imr_addr, ivec->imr);
+	}
+
+	return total_workdone;
+}
+
 static int rtase_open(struct net_device *dev)
 {
 	struct rtase_private *tp = netdev_priv(dev);
-- 
2.34.1