Commit 184fe6f2 authored by Michael Chan's avatar Michael Chan Committed by Leon Romanovsky
Browse files

bnxt_en: Add ULP call to notify async events 



When the driver receives an async event notification from the Firmware,
we make the new ulp_async_notifier() call to inform the RDMA driver that
a firmware async event has been received. RDMA driver can then take
necessary actions based on the event type.

In the next patch, we will implement the ulp_async_notifier() callbacks
in the RDMA driver.

Signed-off-by: default avatarMichael Chan <michael.chan@broadcom.com>
Signed-off-by: default avatarSelvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: default avatarKalesh AP <kalesh-anakkur.purayil@broadcom.com>
Link: https://patch.msgid.link/20250107024553.2926983-2-kalesh-anakkur.purayil@broadcom.com


Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
parent 235f2384

drivers/net/ethernet/broadcom/bnxt/bnxt.c

+1 −0
Original line number Diff line number Diff line
@@ -2857,6 +2857,7 @@ static int bnxt_async_event_process(struct bnxt *bp, 
	}

	__bnxt_queue_sp_work(bp);

async_event_process_exit:

	bnxt_ulp_async_events(bp, cmpl);

	return 0;

}

drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c

+28 −0
Original line number Diff line number Diff line
@@ -345,6 +345,34 @@ void bnxt_ulp_irq_restart(struct bnxt *bp, int err) 
	}

}



void bnxt_ulp_async_events(struct bnxt *bp, struct hwrm_async_event_cmpl *cmpl)

{

	u16 event_id = le16_to_cpu(cmpl->event_id);

	struct bnxt_en_dev *edev = bp->edev;

	struct bnxt_ulp_ops *ops;

	struct bnxt_ulp *ulp;



	if (!bnxt_ulp_registered(edev))

		return;

	ulp = edev->ulp_tbl;



	rcu_read_lock();



	ops = rcu_dereference(ulp->ulp_ops);

	if (!ops || !ops->ulp_async_notifier)

		goto exit_unlock_rcu;

	if (!ulp->async_events_bmap || event_id > ulp->max_async_event_id)

		goto exit_unlock_rcu;



	/* Read max_async_event_id first before testing the bitmap. */

	smp_rmb();



	if (test_bit(event_id, ulp->async_events_bmap))

		ops->ulp_async_notifier(ulp->handle, cmpl);

exit_unlock_rcu:

	rcu_read_unlock();

}



int bnxt_register_async_events(struct bnxt_en_dev *edev,

			       unsigned long *events_bmap,

			       u16 max_id)

drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h

+2 −0
Original line number Diff line number Diff line
@@ -30,6 +30,8 @@ struct bnxt_msix_entry { 
};



struct bnxt_ulp_ops {

	/* async_notifier() cannot sleep (in BH context) */

	void (*ulp_async_notifier)(void *, struct hwrm_async_event_cmpl *);

	void (*ulp_irq_stop)(void *);

	void (*ulp_irq_restart)(void *, struct bnxt_msix_entry *);

};