Commit fcef709c authored by Sunil Goutham's avatar Sunil Goutham Committed by David S. Miller
Browse files

octeontx2-af: Do NIX_RX_SW_SYNC twice 



NIX_RX_SW_SYNC ensures all existing transactions are finished and
pkts are written to LLC/DRAM, queues should be teared down after
successful SW_SYNC. Due to a HW errata, in some rare scenarios
an existing transaction might end after SW_SYNC operation. To
ensure operation is fully done, do the SW_SYNC twice.

Signed-off-by: default avatarSunil Goutham <sgoutham@marvell.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 758684e4

drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c

+13 −2
Original line number Diff line number Diff line
@@ -200,7 +200,18 @@ static void nix_rx_sync(struct rvu *rvu, int blkaddr) 
	rvu_write64(rvu, blkaddr, NIX_AF_RX_SW_SYNC, BIT_ULL(0));

	err = rvu_poll_reg(rvu, blkaddr, NIX_AF_RX_SW_SYNC, BIT_ULL(0), true);

	if (err)

		dev_err(rvu->dev, "NIX RX software sync failed\n");

		dev_err(rvu->dev, "SYNC1: NIX RX software sync failed\n");



	/* SW_SYNC ensures all existing transactions are finished and pkts

	 * are written to LLC/DRAM, queues should be teared down after

	 * successful SW_SYNC. Due to a HW errata, in some rare scenarios

	 * an existing transaction might end after SW_SYNC operation. To

	 * ensure operation is fully done, do the SW_SYNC twice.

	 */

	rvu_write64(rvu, blkaddr, NIX_AF_RX_SW_SYNC, BIT_ULL(0));

	err = rvu_poll_reg(rvu, blkaddr, NIX_AF_RX_SW_SYNC, BIT_ULL(0), true);

	if (err)

		dev_err(rvu->dev, "SYNC2: NIX RX software sync failed\n");

}



static bool is_valid_txschq(struct rvu *rvu, int blkaddr,