drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c - linux - Git at Google

 /* Broadcom NetXtreme-C/E network driver.
  *
  * Copyright (c) 2016-2017 Broadcom Limited
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation.
  */
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/pci.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/if_vlan.h>
 #include <linux/bpf.h>
 #include <linux/bpf_trace.h>
 #include <linux/filter.h>
 #include <net/page_pool.h>
 #include "bnxt_hsi.h"
 #include "bnxt.h"
 #include "bnxt_xdp.h"

 struct bnxt_sw_tx_bd *bnxt_xmit_bd(struct bnxt *bp,
 				   struct bnxt_tx_ring_info *txr,
 				   dma_addr_t mapping, u32 len)
 {
 	struct bnxt_sw_tx_bd *tx_buf;
 	struct tx_bd *txbd;
 	u32 flags;
 	u16 prod;

 	prod = txr->tx_prod;
 	tx_buf = &txr->tx_buf_ring[prod];

 	txbd = &txr->tx_desc_ring[TX_RING(prod)][TX_IDX(prod)];
 	flags = (len << TX_BD_LEN_SHIFT) | (1 << TX_BD_FLAGS_BD_CNT_SHIFT) |
 		TX_BD_FLAGS_PACKET_END | bnxt_lhint_arr[len >> 9];
 	txbd->tx_bd_len_flags_type = cpu_to_le32(flags);
 	txbd->tx_bd_opaque = prod;
 	txbd->tx_bd_haddr = cpu_to_le64(mapping);

 	prod = NEXT_TX(prod);
 	txr->tx_prod = prod;
 	return tx_buf;
 }

 static void __bnxt_xmit_xdp(struct bnxt *bp, struct bnxt_tx_ring_info *txr,
 			    dma_addr_t mapping, u32 len, u16 rx_prod)
 {
 	struct bnxt_sw_tx_bd *tx_buf;

 	tx_buf = bnxt_xmit_bd(bp, txr, mapping, len);
 	tx_buf->rx_prod = rx_prod;
 	tx_buf->action = XDP_TX;
 }

 static void __bnxt_xmit_xdp_redirect(struct bnxt *bp,
 				     struct bnxt_tx_ring_info *txr,
 				     dma_addr_t mapping, u32 len,
 				     struct xdp_frame *xdpf)
 {
 	struct bnxt_sw_tx_bd *tx_buf;

 	tx_buf = bnxt_xmit_bd(bp, txr, mapping, len);
 	tx_buf->action = XDP_REDIRECT;
 	tx_buf->xdpf = xdpf;
 	dma_unmap_addr_set(tx_buf, mapping, mapping);
 	dma_unmap_len_set(tx_buf, len, 0);
 }

 void bnxt_tx_int_xdp(struct bnxt *bp, struct bnxt_napi *bnapi, int nr_pkts)
 {
 	struct bnxt_tx_ring_info *txr = bnapi->tx_ring;
 	struct bnxt_rx_ring_info *rxr = bnapi->rx_ring;
 	bool rx_doorbell_needed = false;
 	struct bnxt_sw_tx_bd *tx_buf;
 	u16 tx_cons = txr->tx_cons;
 	u16 last_tx_cons = tx_cons;
 	int i;

 	for (i = 0; i < nr_pkts; i++) {
 		tx_buf = &txr->tx_buf_ring[tx_cons];

 		if (tx_buf->action == XDP_REDIRECT) {
 			struct pci_dev *pdev = bp->pdev;

 			dma_unmap_single(&pdev->dev,
 					 dma_unmap_addr(tx_buf, mapping),
 					 dma_unmap_len(tx_buf, len),
 					 DMA_TO_DEVICE);
 			xdp_return_frame(tx_buf->xdpf);
 			tx_buf->action = 0;
 			tx_buf->xdpf = NULL;
 		} else if (tx_buf->action == XDP_TX) {
 			rx_doorbell_needed = true;
 			last_tx_cons = tx_cons;
 		}
 		tx_cons = NEXT_TX(tx_cons);
 	}
 	txr->tx_cons = tx_cons;
 	if (rx_doorbell_needed) {
 		tx_buf = &txr->tx_buf_ring[last_tx_cons];
 		bnxt_db_write(bp, &rxr->rx_db, tx_buf->rx_prod);
 	}
 }

 /* returns the following:
  * true    - packet consumed by XDP and new buffer is allocated.
  * false   - packet should be passed to the stack.
  */
 bool bnxt_rx_xdp(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons,
 		 struct page *page, u8 **data_ptr, unsigned int *len, u8 *event)
 {
 	struct bpf_prog *xdp_prog = READ_ONCE(rxr->xdp_prog);
 	struct bnxt_tx_ring_info *txr;
 	struct bnxt_sw_rx_bd *rx_buf;
 	struct pci_dev *pdev;
 	struct xdp_buff xdp;
 	dma_addr_t mapping;
 	void *orig_data;
 	u32 tx_avail;
 	u32 offset;
 	u32 act;

 	if (!xdp_prog)
 		return false;

 	pdev = bp->pdev;
 	rx_buf = &rxr->rx_buf_ring[cons];
 	offset = bp->rx_offset;

 	mapping = rx_buf->mapping - bp->rx_dma_offset;
 	dma_sync_single_for_cpu(&pdev->dev, mapping + offset, *len, bp->rx_dir);

 	txr = rxr->bnapi->tx_ring;
 	/* BNXT_RX_PAGE_MODE(bp) when XDP enabled */
 	xdp_init_buff(&xdp, PAGE_SIZE, &rxr->xdp_rxq);
 	xdp_prepare_buff(&xdp, *data_ptr - offset, offset, *len, false);
 	orig_data = xdp.data;

 	act = bpf_prog_run_xdp(xdp_prog, &xdp);

 	tx_avail = bnxt_tx_avail(bp, txr);
 	/* If the tx ring is not full, we must not update the rx producer yet
 	 * because we may still be transmitting on some BDs.
 	 */
 	if (tx_avail != bp->tx_ring_size)
 		*event &= ~BNXT_RX_EVENT;

 	*len = xdp.data_end - xdp.data;
 	if (orig_data != xdp.data) {
 		offset = xdp.data - xdp.data_hard_start;
 		*data_ptr = xdp.data_hard_start + offset;
 	}
 	switch (act) {
 	case XDP_PASS:
 		return false;

 	case XDP_TX:
 		if (tx_avail < 1) {
 			trace_xdp_exception(bp->dev, xdp_prog, act);
 			bnxt_reuse_rx_data(rxr, cons, page);
 			return true;
 		}

 		*event = BNXT_TX_EVENT;
 		dma_sync_single_for_device(&pdev->dev, mapping + offset, *len,
 					   bp->rx_dir);
 		__bnxt_xmit_xdp(bp, txr, mapping + offset, *len,
 				NEXT_RX(rxr->rx_prod));
 		bnxt_reuse_rx_data(rxr, cons, page);
 		return true;
 	case XDP_REDIRECT:
 		/* if we are calling this here then we know that the
 		 * redirect is coming from a frame received by the
 		 * bnxt_en driver.
 		 */
 		dma_unmap_page_attrs(&pdev->dev, mapping,
 				     PAGE_SIZE, bp->rx_dir,
 				     DMA_ATTR_WEAK_ORDERING);

 		/* if we are unable to allocate a new buffer, abort and reuse */
 		if (bnxt_alloc_rx_data(bp, rxr, rxr->rx_prod, GFP_ATOMIC)) {
 			trace_xdp_exception(bp->dev, xdp_prog, act);
 			bnxt_reuse_rx_data(rxr, cons, page);
 			return true;
 		}

 		if (xdp_do_redirect(bp->dev, &xdp, xdp_prog)) {
 			trace_xdp_exception(bp->dev, xdp_prog, act);
 			page_pool_recycle_direct(rxr->page_pool, page);
 			return true;
 		}

 		*event |= BNXT_REDIRECT_EVENT;
 		break;
 	default:
 		bpf_warn_invalid_xdp_action(bp->dev, xdp_prog, act);
 		fallthrough;
 	case XDP_ABORTED:
 		trace_xdp_exception(bp->dev, xdp_prog, act);
 		fallthrough;
 	case XDP_DROP:
 		bnxt_reuse_rx_data(rxr, cons, page);
 		break;
 	}
 	return true;
 }

 int bnxt_xdp_xmit(struct net_device *dev, int num_frames,
 		  struct xdp_frame **frames, u32 flags)
 {
 	struct bnxt *bp = netdev_priv(dev);
 	struct bpf_prog *xdp_prog = READ_ONCE(bp->xdp_prog);
 	struct pci_dev *pdev = bp->pdev;
 	struct bnxt_tx_ring_info *txr;
 	dma_addr_t mapping;
 	int nxmit = 0;
 	int ring;
 	int i;

 	if (!test_bit(BNXT_STATE_OPEN, &bp->state) ||
 	    !bp->tx_nr_rings_xdp ||
 	    !xdp_prog)
 		return -EINVAL;

 	ring = smp_processor_id() % bp->tx_nr_rings_xdp;
 	txr = &bp->tx_ring[ring];

 	for (i = 0; i < num_frames; i++) {
 		struct xdp_frame *xdp = frames[i];

 		if (!txr || !bnxt_tx_avail(bp, txr) ||
 		    !(bp->bnapi[ring]->flags & BNXT_NAPI_FLAG_XDP))
 			break;

 		mapping = dma_map_single(&pdev->dev, xdp->data, xdp->len,
 					 DMA_TO_DEVICE);

 		if (dma_mapping_error(&pdev->dev, mapping))
 			break;

 		__bnxt_xmit_xdp_redirect(bp, txr, mapping, xdp->len, xdp);
 		nxmit++;
 	}

 	if (flags & XDP_XMIT_FLUSH) {
 		/* Sync BD data before updating doorbell */
 		wmb();
 		bnxt_db_write(bp, &txr->tx_db, txr->tx_prod);
 	}

 	return nxmit;
 }

 /* Under rtnl_lock */
 static int bnxt_xdp_set(struct bnxt *bp, struct bpf_prog *prog)
 {
 	struct net_device *dev = bp->dev;
 	int tx_xdp = 0, rc, tc;
 	struct bpf_prog *old;

 	if (prog && bp->dev->mtu > BNXT_MAX_PAGE_MODE_MTU) {
 		netdev_warn(dev, "MTU %d larger than largest XDP supported MTU %d.\n",
 			    bp->dev->mtu, BNXT_MAX_PAGE_MODE_MTU);
 		return -EOPNOTSUPP;
 	}
 	if (!(bp->flags & BNXT_FLAG_SHARED_RINGS)) {
 		netdev_warn(dev, "ethtool rx/tx channels must be combined to support XDP.\n");
 		return -EOPNOTSUPP;
 	}
 	if (prog)
 		tx_xdp = bp->rx_nr_rings;

 	tc = netdev_get_num_tc(dev);
 	if (!tc)
 		tc = 1;
 	rc = bnxt_check_rings(bp, bp->tx_nr_rings_per_tc, bp->rx_nr_rings,
 			      true, tc, tx_xdp);
 	if (rc) {
 		netdev_warn(dev, "Unable to reserve enough TX rings to support XDP.\n");
 		return rc;
 	}
 	if (netif_running(dev))
 		bnxt_close_nic(bp, true, false);

 	old = xchg(&bp->xdp_prog, prog);
 	if (old)
 		bpf_prog_put(old);

 	if (prog) {
 		bnxt_set_rx_skb_mode(bp, true);
 	} else {
 		int rx, tx;

 		bnxt_set_rx_skb_mode(bp, false);
 		bnxt_get_max_rings(bp, &rx, &tx, true);
 		if (rx > 1) {
 			bp->flags &= ~BNXT_FLAG_NO_AGG_RINGS;
 			bp->dev->hw_features |= NETIF_F_LRO;
 		}
 	}
 	bp->tx_nr_rings_xdp = tx_xdp;
 	bp->tx_nr_rings = bp->tx_nr_rings_per_tc * tc + tx_xdp;
 	bp->cp_nr_rings = max_t(int, bp->tx_nr_rings, bp->rx_nr_rings);
 	bnxt_set_tpa_flags(bp);
 	bnxt_set_ring_params(bp);

 	if (netif_running(dev))
 		return bnxt_open_nic(bp, true, false);

 	return 0;
 }

 int bnxt_xdp(struct net_device *dev, struct netdev_bpf *xdp)
 {
 	struct bnxt *bp = netdev_priv(dev);
 	int rc;

 	switch (xdp->command) {
 	case XDP_SETUP_PROG:
 		rc = bnxt_xdp_set(bp, xdp->prog);
 		break;
 	default:
 		rc = -EINVAL;
 		break;
 	}
 	return rc;
 }
	/* Broadcom NetXtreme-C/E network driver.
	*
	* Copyright (c) 2016-2017 Broadcom Limited
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation.
	*/
	#include <linux/kernel.h>
	#include <linux/errno.h>
	#include <linux/pci.h>
	#include <linux/netdevice.h>
	#include <linux/etherdevice.h>
	#include <linux/if_vlan.h>
	#include <linux/bpf.h>
	#include <linux/bpf_trace.h>
	#include <linux/filter.h>
	#include <net/page_pool.h>
	#include "bnxt_hsi.h"
	#include "bnxt.h"
	#include "bnxt_xdp.h"

	struct bnxt_sw_tx_bd bnxt_xmit_bd(struct bnxt bp,
	struct bnxt_tx_ring_info *txr,
	dma_addr_t mapping, u32 len)
	{
	struct bnxt_sw_tx_bd *tx_buf;
	struct tx_bd *txbd;
	u32 flags;
	u16 prod;

	prod = txr->tx_prod;
	tx_buf = &txr->tx_buf_ring[prod];

	txbd = &txr->tx_desc_ring[TX_RING(prod)][TX_IDX(prod)];
	flags = (len << TX_BD_LEN_SHIFT) \| (1 << TX_BD_FLAGS_BD_CNT_SHIFT) \|
	TX_BD_FLAGS_PACKET_END \| bnxt_lhint_arr[len >> 9];
	txbd->tx_bd_len_flags_type = cpu_to_le32(flags);
	txbd->tx_bd_opaque = prod;
	txbd->tx_bd_haddr = cpu_to_le64(mapping);

	prod = NEXT_TX(prod);
	txr->tx_prod = prod;
	return tx_buf;
	}

	static void __bnxt_xmit_xdp(struct bnxt bp, struct bnxt_tx_ring_info txr,
	dma_addr_t mapping, u32 len, u16 rx_prod)
	{
	struct bnxt_sw_tx_bd *tx_buf;

	tx_buf = bnxt_xmit_bd(bp, txr, mapping, len);
	tx_buf->rx_prod = rx_prod;
	tx_buf->action = XDP_TX;
	}

	static void __bnxt_xmit_xdp_redirect(struct bnxt *bp,
	struct bnxt_tx_ring_info *txr,
	dma_addr_t mapping, u32 len,
	struct xdp_frame *xdpf)
	{
	struct bnxt_sw_tx_bd *tx_buf;

	tx_buf = bnxt_xmit_bd(bp, txr, mapping, len);
	tx_buf->action = XDP_REDIRECT;
	tx_buf->xdpf = xdpf;
	dma_unmap_addr_set(tx_buf, mapping, mapping);
	dma_unmap_len_set(tx_buf, len, 0);
	}

	void bnxt_tx_int_xdp(struct bnxt bp, struct bnxt_napi bnapi, int nr_pkts)
	{
	struct bnxt_tx_ring_info *txr = bnapi->tx_ring;
	struct bnxt_rx_ring_info *rxr = bnapi->rx_ring;
	bool rx_doorbell_needed = false;
	struct bnxt_sw_tx_bd *tx_buf;
	u16 tx_cons = txr->tx_cons;
	u16 last_tx_cons = tx_cons;
	int i;

	for (i = 0; i < nr_pkts; i++) {
	tx_buf = &txr->tx_buf_ring[tx_cons];

	if (tx_buf->action == XDP_REDIRECT) {
	struct pci_dev *pdev = bp->pdev;

	dma_unmap_single(&pdev->dev,
	dma_unmap_addr(tx_buf, mapping),
	dma_unmap_len(tx_buf, len),
	DMA_TO_DEVICE);
	xdp_return_frame(tx_buf->xdpf);
	tx_buf->action = 0;
	tx_buf->xdpf = NULL;
	} else if (tx_buf->action == XDP_TX) {
	rx_doorbell_needed = true;
	last_tx_cons = tx_cons;
	}
	tx_cons = NEXT_TX(tx_cons);
	}
	txr->tx_cons = tx_cons;
	if (rx_doorbell_needed) {
	tx_buf = &txr->tx_buf_ring[last_tx_cons];
	bnxt_db_write(bp, &rxr->rx_db, tx_buf->rx_prod);
	}
	}

	/* returns the following:
	* true - packet consumed by XDP and new buffer is allocated.
	* false - packet should be passed to the stack.
	*/
	bool bnxt_rx_xdp(struct bnxt bp, struct bnxt_rx_ring_info rxr, u16 cons,
	struct page page, u8 data_ptr, unsigned int len, u8 *event)
	{
	struct bpf_prog *xdp_prog = READ_ONCE(rxr->xdp_prog);
	struct bnxt_tx_ring_info *txr;
	struct bnxt_sw_rx_bd *rx_buf;
	struct pci_dev *pdev;
	struct xdp_buff xdp;
	dma_addr_t mapping;
	void *orig_data;
	u32 tx_avail;
	u32 offset;
	u32 act;

	if (!xdp_prog)
	return false;

	pdev = bp->pdev;
	rx_buf = &rxr->rx_buf_ring[cons];
	offset = bp->rx_offset;

	mapping = rx_buf->mapping - bp->rx_dma_offset;
	dma_sync_single_for_cpu(&pdev->dev, mapping + offset, *len, bp->rx_dir);

	txr = rxr->bnapi->tx_ring;
	/* BNXT_RX_PAGE_MODE(bp) when XDP enabled */
	xdp_init_buff(&xdp, PAGE_SIZE, &rxr->xdp_rxq);
	xdp_prepare_buff(&xdp, data_ptr - offset, offset, len, false);
	orig_data = xdp.data;

	act = bpf_prog_run_xdp(xdp_prog, &xdp);

	tx_avail = bnxt_tx_avail(bp, txr);
	/* If the tx ring is not full, we must not update the rx producer yet
	* because we may still be transmitting on some BDs.
	*/
	if (tx_avail != bp->tx_ring_size)
	*event &= ~BNXT_RX_EVENT;

	*len = xdp.data_end - xdp.data;
	if (orig_data != xdp.data) {
	offset = xdp.data - xdp.data_hard_start;
	*data_ptr = xdp.data_hard_start + offset;
	}
	switch (act) {
	case XDP_PASS:
	return false;

	case XDP_TX:
	if (tx_avail < 1) {
	trace_xdp_exception(bp->dev, xdp_prog, act);
	bnxt_reuse_rx_data(rxr, cons, page);
	return true;
	}

	*event = BNXT_TX_EVENT;
	dma_sync_single_for_device(&pdev->dev, mapping + offset, *len,
	bp->rx_dir);
	__bnxt_xmit_xdp(bp, txr, mapping + offset, *len,
	NEXT_RX(rxr->rx_prod));
	bnxt_reuse_rx_data(rxr, cons, page);
	return true;
	case XDP_REDIRECT:
	/* if we are calling this here then we know that the
	* redirect is coming from a frame received by the
	* bnxt_en driver.
	*/
	dma_unmap_page_attrs(&pdev->dev, mapping,
	PAGE_SIZE, bp->rx_dir,
	DMA_ATTR_WEAK_ORDERING);

	/* if we are unable to allocate a new buffer, abort and reuse */
	if (bnxt_alloc_rx_data(bp, rxr, rxr->rx_prod, GFP_ATOMIC)) {
	trace_xdp_exception(bp->dev, xdp_prog, act);
	bnxt_reuse_rx_data(rxr, cons, page);
	return true;
	}

	if (xdp_do_redirect(bp->dev, &xdp, xdp_prog)) {
	trace_xdp_exception(bp->dev, xdp_prog, act);
	page_pool_recycle_direct(rxr->page_pool, page);
	return true;
	}

	*event \|= BNXT_REDIRECT_EVENT;
	break;
	default:
	bpf_warn_invalid_xdp_action(bp->dev, xdp_prog, act);
	fallthrough;
	case XDP_ABORTED:
	trace_xdp_exception(bp->dev, xdp_prog, act);
	fallthrough;
	case XDP_DROP:
	bnxt_reuse_rx_data(rxr, cons, page);
	break;
	}
	return true;
	}

	int bnxt_xdp_xmit(struct net_device *dev, int num_frames,
	struct xdp_frame **frames, u32 flags)
	{
	struct bnxt *bp = netdev_priv(dev);
	struct bpf_prog *xdp_prog = READ_ONCE(bp->xdp_prog);
	struct pci_dev *pdev = bp->pdev;
	struct bnxt_tx_ring_info *txr;
	dma_addr_t mapping;
	int nxmit = 0;
	int ring;
	int i;

	if (!test_bit(BNXT_STATE_OPEN, &bp->state) \|\|
	!bp->tx_nr_rings_xdp \|\|
	!xdp_prog)
	return -EINVAL;

	ring = smp_processor_id() % bp->tx_nr_rings_xdp;
	txr = &bp->tx_ring[ring];

	for (i = 0; i < num_frames; i++) {
	struct xdp_frame *xdp = frames[i];

	if (!txr \|\| !bnxt_tx_avail(bp, txr) \|\|
	!(bp->bnapi[ring]->flags & BNXT_NAPI_FLAG_XDP))
	break;

	mapping = dma_map_single(&pdev->dev, xdp->data, xdp->len,
	DMA_TO_DEVICE);

	if (dma_mapping_error(&pdev->dev, mapping))
	break;

	__bnxt_xmit_xdp_redirect(bp, txr, mapping, xdp->len, xdp);
	nxmit++;
	}

	if (flags & XDP_XMIT_FLUSH) {
	/* Sync BD data before updating doorbell */
	wmb();
	bnxt_db_write(bp, &txr->tx_db, txr->tx_prod);
	}

	return nxmit;
	}

	/* Under rtnl_lock */
	static int bnxt_xdp_set(struct bnxt bp, struct bpf_prog prog)
	{
	struct net_device *dev = bp->dev;
	int tx_xdp = 0, rc, tc;
	struct bpf_prog *old;

	if (prog && bp->dev->mtu > BNXT_MAX_PAGE_MODE_MTU) {
	netdev_warn(dev, "MTU %d larger than largest XDP supported MTU %d.\n",
	bp->dev->mtu, BNXT_MAX_PAGE_MODE_MTU);
	return -EOPNOTSUPP;
	}
	if (!(bp->flags & BNXT_FLAG_SHARED_RINGS)) {
	netdev_warn(dev, "ethtool rx/tx channels must be combined to support XDP.\n");
	return -EOPNOTSUPP;
	}
	if (prog)
	tx_xdp = bp->rx_nr_rings;

	tc = netdev_get_num_tc(dev);
	if (!tc)
	tc = 1;
	rc = bnxt_check_rings(bp, bp->tx_nr_rings_per_tc, bp->rx_nr_rings,
	true, tc, tx_xdp);
	if (rc) {
	netdev_warn(dev, "Unable to reserve enough TX rings to support XDP.\n");
	return rc;
	}
	if (netif_running(dev))
	bnxt_close_nic(bp, true, false);

	old = xchg(&bp->xdp_prog, prog);
	if (old)
	bpf_prog_put(old);

	if (prog) {
	bnxt_set_rx_skb_mode(bp, true);
	} else {
	int rx, tx;

	bnxt_set_rx_skb_mode(bp, false);
	bnxt_get_max_rings(bp, &rx, &tx, true);
	if (rx > 1) {
	bp->flags &= ~BNXT_FLAG_NO_AGG_RINGS;
	bp->dev->hw_features \|= NETIF_F_LRO;
	}
	}
	bp->tx_nr_rings_xdp = tx_xdp;
	bp->tx_nr_rings = bp->tx_nr_rings_per_tc * tc + tx_xdp;
	bp->cp_nr_rings = max_t(int, bp->tx_nr_rings, bp->rx_nr_rings);
	bnxt_set_tpa_flags(bp);
	bnxt_set_ring_params(bp);

	if (netif_running(dev))
	return bnxt_open_nic(bp, true, false);

	return 0;
	}

	int bnxt_xdp(struct net_device dev, struct netdev_bpf xdp)
	{
	struct bnxt *bp = netdev_priv(dev);
	int rc;

	switch (xdp->command) {
	case XDP_SETUP_PROG:
	rc = bnxt_xdp_set(bp, xdp->prog);
	break;
	default:
	rc = -EINVAL;
	break;
	}
	return rc;
	}