Commit 2bbba79e authored by Justin Lai's avatar Justin Lai Committed by Jakub Kicinski
Browse files

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: default avatarJustin Lai <justinlai0215@realtek.com>
Link: https://patch.msgid.link/20240904032114.247117-5-justinlai0215@realtek.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 5a2a2f15

drivers/net/ethernet/realtek/rtase/rtase_main.c

+69 −0
Original line number Diff line number Diff line
@@ -571,6 +571,75 @@ 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);