[net-next v2 PATCH] octeontx2-pf: Add XDP support to netdev PF

Geetha sowjanya
2021-09-29T09:55:23Z

Adds XDP_PASS, XDP_TX, XDP_DROP and XDP_REDIRECT support
for netdev PF.

Signed-off-by: Geetha sowjanya <gakula@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
---
v1-v2:
-Fixed compilation warnings.

.../marvell/octeontx2/nic/otx2_common.c | 35 ++--
.../marvell/octeontx2/nic/otx2_common.h | 4 +
.../ethernet/marvell/octeontx2/nic/otx2_pf.c | 135 +++++++++++++-
.../marvell/octeontx2/nic/otx2_txrx.c | 174 ++++++++++++++++--
.../marvell/octeontx2/nic/otx2_txrx.h | 7 +-
.../ethernet/marvell/octeontx2/nic/otx2_vf.c | 1 +
6 files changed, 322 insertions(+), 34 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
index 4c3dbade8cfb..0aa88cea1676 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
@@ -718,7 +718,7 @@ void otx2_sqb_flush(struct otx2_nic *pfvf)
int timeout = 1000;

ptr = (u64 *)otx2_get_regaddr(pfvf, NIX_LF_SQ_OP_STATUS);
- for (qidx = 0; qidx < pfvf->hw.tx_queues; qidx++) {
+ for (qidx = 0; qidx < pfvf->hw.tot_tx_queues; qidx++) {
incr = (u64)qidx << 32;
while (timeout) {
val = otx2_atomic64_add(incr, ptr);
@@ -835,17 +835,19 @@ static int otx2_sq_init(struct otx2_nic *pfvf, u16 qidx, u16 sqb_aura)
if (err)
return err;

- err = qmem_alloc(pfvf->dev, &sq->tso_hdrs, qset->sqe_cnt,
- TSO_HEADER_SIZE);
- if (err)
- return err;
+ if (qidx < pfvf->hw.tx_queues) {
+ err = qmem_alloc(pfvf->dev, &sq->tso_hdrs, qset->sqe_cnt,
+ TSO_HEADER_SIZE);
+ if (err)
+ return err;
+ }

sq->sqe_base = sq->sqe->base;
sq->sg = kcalloc(qset->sqe_cnt, sizeof(struct sg_list), GFP_KERNEL);
if (!sq->sg)
return -ENOMEM;

- if (pfvf->ptp) {
+ if (pfvf->ptp && qidx < pfvf->hw.tx_queues) {
err = qmem_alloc(pfvf->dev, &sq->timestamps, qset->sqe_cnt,
sizeof(*sq->timestamps));
if (err)
@@ -871,20 +873,27 @@ static int otx2_sq_init(struct otx2_nic *pfvf, u16 qidx, u16 sqb_aura)
static int otx2_cq_init(struct otx2_nic *pfvf, u16 qidx)
{
struct otx2_qset *qset = &pfvf->qset;
+ int err, pool_id, non_xdp_queues;
struct nix_aq_enq_req *aq;
struct otx2_cq_queue *cq;
- int err, pool_id;

cq = &qset->cq[qidx];
cq->cq_idx = qidx;
+ non_xdp_queues = pfvf->hw.rx_queues + pfvf->hw.tx_queues;
if (qidx < pfvf->hw.rx_queues) {
cq->cq_type = CQ_RX;
cq->cint_idx = qidx;
cq->cqe_cnt = qset->rqe_cnt;
- } else {
+ if (pfvf->xdp_prog)
+ xdp_rxq_info_reg(&cq->xdp_rxq, pfvf->netdev, qidx, 0);
+ } else if (qidx < non_xdp_queues) {
cq->cq_type = CQ_TX;
cq->cint_idx = qidx - pfvf->hw.rx_queues;
cq->cqe_cnt = qset->sqe_cnt;
+ } else {
+ cq->cq_type = CQ_XDP;
+ cq->cint_idx = qidx - non_xdp_queues;
+ cq->cqe_cnt = qset->sqe_cnt;
}
cq->cqe_size = pfvf->qset.xqe_size;

@@ -991,7 +1000,7 @@ int otx2_config_nix_queues(struct otx2_nic *pfvf)
}

/* Initialize TX queues */
- for (qidx = 0; qidx < pfvf->hw.tx_queues; qidx++) {
+ for (qidx = 0; qidx < pfvf->hw.tot_tx_queues; qidx++) {
u16 sqb_aura = otx2_get_pool_idx(pfvf, AURA_NIX_SQ, qidx);

err = otx2_sq_init(pfvf, qidx, sqb_aura);
@@ -1038,7 +1047,7 @@ int otx2_config_nix(struct otx2_nic *pfvf)

/* Set RQ/SQ/CQ counts */
nixlf->rq_cnt = pfvf->hw.rx_queues;
- nixlf->sq_cnt = pfvf->hw.tx_queues;
+ nixlf->sq_cnt = pfvf->hw.tot_tx_queues;
nixlf->cq_cnt = pfvf->qset.cq_cnt;
nixlf->rss_sz = MAX_RSS_INDIR_TBL_SIZE;
nixlf->rss_grps = MAX_RSS_GROUPS;
@@ -1076,7 +1085,7 @@ void otx2_sq_free_sqbs(struct otx2_nic *pfvf)
int sqb, qidx;
u64 iova, pa;

- for (qidx = 0; qidx < hw->tx_queues; qidx++) {
+ for (qidx = 0; qidx < hw->tot_tx_queues; qidx++) {
sq = &qset->sq[qidx];
if (!sq->sqb_ptrs)
continue;
@@ -1288,7 +1297,7 @@ int otx2_sq_aura_pool_init(struct otx2_nic *pfvf)
stack_pages =
(num_sqbs + hw->stack_pg_ptrs - 1) / hw->stack_pg_ptrs;

- for (qidx = 0; qidx < hw->tx_queues; qidx++) {
+ for (qidx = 0; qidx < hw->tot_tx_queues; qidx++) {
pool_id = otx2_get_pool_idx(pfvf, AURA_NIX_SQ, qidx);
/* Initialize aura context */
err = otx2_aura_init(pfvf, pool_id, pool_id, num_sqbs);
@@ -1308,7 +1317,7 @@ int otx2_sq_aura_pool_init(struct otx2_nic *pfvf)
goto fail;

/* Allocate pointers and free them to aura/pool */
- for (qidx = 0; qidx < hw->tx_queues; qidx++) {
+ for (qidx = 0; qidx < hw->tot_tx_queues; qidx++) {
pool_id = otx2_get_pool_idx(pfvf, AURA_NIX_SQ, qidx);
pool = &pfvf->qset.pool[pool_id];

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
index 069d1b925102..184b4f893856 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
@@ -171,6 +171,8 @@ struct otx2_hw {
struct otx2_rss_info rss_info;
u16 rx_queues;
u16 tx_queues;
+ u16 xdp_queues;
+ u16 tot_tx_queues;
u16 max_queues;
u16 pool_cnt;
u16 rqpool_cnt;
@@ -345,6 +347,7 @@ struct otx2_nic {
u64 flags;
u64 *cq_op_addr;

+ struct bpf_prog *xdp_prog;
struct otx2_qset qset;
struct otx2_hw hw;
struct pci_dev *pdev;
@@ -854,6 +857,7 @@ int otx2_del_macfilter(struct net_device *netdev, const u8 *mac);
int otx2_add_macfilter(struct net_device *netdev, const u8 *mac);
int otx2_enable_rxvlan(struct otx2_nic *pf, bool enable);
int otx2_install_rxvlan_offload_flow(struct otx2_nic *pfvf);
+bool otx2_xdp_sq_append_pkt(struct otx2_nic *pfvf, u64 iova, int len, u16 qidx);
u16 otx2_get_max_mtu(struct otx2_nic *pfvf);
/* tc support */
int otx2_init_tc(struct otx2_nic *nic);
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
index 53df7fff92c4..4d0c085dae0c 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
@@ -13,6 +13,8 @@
#include <linux/if_vlan.h>
#include <linux/iommu.h>
#include <net/ip.h>
+#include <linux/bpf.h>
+#include <linux/bpf_trace.h>

#include "otx2_reg.h"
#include "otx2_common.h"
@@ -48,9 +50,15 @@ static int otx2_config_hw_rx_tstamp(struct otx2_nic *pfvf, bool enable);

static int otx2_change_mtu(struct net_device *netdev, int new_mtu)
{
+ struct otx2_nic *pf = netdev_priv(netdev);
bool if_up = netif_running(netdev);
int err = 0;

+ if (pf->xdp_prog && new_mtu > MAX_XDP_MTU) {
+ netdev_warn(netdev, "Jumbo frames not yet supported with XDP, current MTU %d.\n",
+ netdev->mtu);
+ return -EINVAL;
+ }
if (if_up)
otx2_stop(netdev);

@@ -1180,7 +1188,7 @@ static irqreturn_t otx2_q_intr_handler(int irq, void *data)
}

/* SQ */
- for (qidx = 0; qidx < pf->hw.tx_queues; qidx++) {
+ for (qidx = 0; qidx < pf->hw.tot_tx_queues; qidx++) {
ptr = otx2_get_regaddr(pf, NIX_LF_SQ_OP_INT);
val = otx2_atomic64_add((qidx << 44), ptr);
otx2_write64(pf, NIX_LF_SQ_OP_INT, (qidx << 44) |
@@ -1283,7 +1291,7 @@ static void otx2_free_sq_res(struct otx2_nic *pf)
otx2_ctx_disable(&pf->mbox, NIX_AQ_CTYPE_SQ, false);
/* Free SQB pointers */
otx2_sq_free_sqbs(pf);
- for (qidx = 0; qidx < pf->hw.tx_queues; qidx++) {
+ for (qidx = 0; qidx < pf->hw.tot_tx_queues; qidx++) {
sq = &qset->sq[qidx];
qmem_free(pf->dev, sq->sqe);
qmem_free(pf->dev, sq->tso_hdrs);
@@ -1332,7 +1340,7 @@ static int otx2_init_hw_resources(struct otx2_nic *pf)
* so, aura count = pool count.
*/
hw->rqpool_cnt = hw->rx_queues;
- hw->sqpool_cnt = hw->tx_queues;
+ hw->sqpool_cnt = hw->tot_tx_queues;
hw->pool_cnt = hw->rqpool_cnt + hw->sqpool_cnt;

pf->max_frs = pf->netdev->mtu + OTX2_ETH_HLEN + OTX2_HW_TIMESTAMP_LEN;
@@ -1503,7 +1511,7 @@ int otx2_open(struct net_device *netdev)

netif_carrier_off(netdev);

- pf->qset.cq_cnt = pf->hw.rx_queues + pf->hw.tx_queues;
+ pf->qset.cq_cnt = pf->hw.rx_queues + pf->hw.tot_tx_queues;
/* RQ and SQs are mapped to different CQs,
* so find out max CQ IRQs (i.e CINTs) needed.
*/
@@ -1523,7 +1531,7 @@ int otx2_open(struct net_device *netdev)
if (!qset->cq)
goto err_free_mem;

- qset->sq = kcalloc(pf->hw.tx_queues,
+ qset->sq = kcalloc(pf->hw.tot_tx_queues,
sizeof(struct otx2_snd_queue), GFP_KERNEL);
if (!qset->sq)
goto err_free_mem;
@@ -1544,11 +1552,20 @@ int otx2_open(struct net_device *netdev)
/* RQ0 & SQ0 are mapped to CINT0 and so on..
* 'cq_ids[0]' points to RQ's CQ and
* 'cq_ids[1]' points to SQ's CQ and
+ * 'cq_ids[2]' points to XDP's CQ and
*/
cq_poll->cq_ids[CQ_RX] =
(qidx < pf->hw.rx_queues) ? qidx : CINT_INVALID_CQ;
cq_poll->cq_ids[CQ_TX] = (qidx < pf->hw.tx_queues) ?
qidx + pf->hw.rx_queues : CINT_INVALID_CQ;
+ if (pf->xdp_prog)
+ cq_poll->cq_ids[CQ_XDP] = (qidx < pf->hw.xdp_queues) ?
+ (qidx + pf->hw.rx_queues +
+ pf->hw.tx_queues) :
+ CINT_INVALID_CQ;
+ else
+ cq_poll->cq_ids[CQ_XDP] = CINT_INVALID_CQ;
+
cq_poll->dev = (void *)pf;
netif_napi_add(netdev, &cq_poll->napi,
otx2_napi_handler, NAPI_POLL_WEIGHT);
@@ -2281,6 +2298,111 @@ static int otx2_get_vf_config(struct net_device *netdev, int vf,
return 0;
}

+static int otx2_xdp_xmit_tx(struct otx2_nic *pf, struct xdp_frame *xdpf,
+ int qidx)
+{
+ struct page *page;
+ u64 dma_addr;
+ int err = 0;
+
+ dma_addr = otx2_dma_map_page(pf, virt_to_page(xdpf->data),
+ offset_in_page(xdpf->data), xdpf->len,
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(pf->dev, dma_addr))
+ return -ENOMEM;
+
+ err = otx2_xdp_sq_append_pkt(pf, dma_addr, xdpf->len, qidx);
+ if (!err) {
+ otx2_dma_unmap_page(pf, dma_addr, xdpf->len, DMA_TO_DEVICE);
+ page = virt_to_page(xdpf->data);
+ put_page(page);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+static int otx2_xdp_xmit(struct net_device *netdev, int n,
+ struct xdp_frame **frames, u32 flags)
+{
+ struct otx2_nic *pf = netdev_priv(netdev);
+ int qidx = smp_processor_id();
+ struct otx2_snd_queue *sq;
+ int drops = 0, i;
+
+ if (!netif_running(netdev))
+ return -ENETDOWN;
+
+ qidx += pf->hw.tx_queues;
+ sq = pf->xdp_prog ? &pf->qset.sq[qidx] : NULL;
+
+ /* Abort xmit if xdp queue is not */
+ if (unlikely(!sq))
+ return -ENXIO;
+
+ if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
+ return -EINVAL;
+
+ for (i = 0; i < n; i++) {
+ struct xdp_frame *xdpf = frames[i];
+ int err;
+
+ err = otx2_xdp_xmit_tx(pf, xdpf, qidx);
+ if (err)
+ drops++;
+ }
+ return n - drops;
+}
+
+static int otx2_xdp_setup(struct otx2_nic *pf, struct bpf_prog *prog)
+{
+ struct net_device *dev = pf->netdev;
+ bool if_up = netif_running(pf->netdev);
+ struct bpf_prog *old_prog;
+
+ if (prog && dev->mtu > MAX_XDP_MTU) {
+ netdev_warn(dev, "Jumbo frames not yet supported with XDP\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (if_up)
+ otx2_stop(pf->netdev);
+
+ old_prog = xchg(&pf->xdp_prog, prog);
+
+ if (old_prog)
+ bpf_prog_put(old_prog);
+
+ if (pf->xdp_prog)
+ bpf_prog_add(pf->xdp_prog, pf->hw.rx_queues - 1);
+
+ /* Network stack and XDP shared same rx queues.
+ * Use separate tx queues for XDP and network stack.
+ */
+ if (pf->xdp_prog)
+ pf->hw.xdp_queues = pf->hw.rx_queues;
+ else
+ pf->hw.xdp_queues = 0;
+
+ pf->hw.tot_tx_queues += pf->hw.xdp_queues;
+
+ if (if_up)
+ otx2_open(pf->netdev);
+
+ return 0;
+}
+
+static int otx2_xdp(struct net_device *netdev, struct netdev_bpf *xdp)
+{
+ struct otx2_nic *pf = netdev_priv(netdev);
+
+ switch (xdp->command) {
+ case XDP_SETUP_PROG:
+ return otx2_xdp_setup(pf, xdp->prog);
+ default:
+ return -EINVAL;
+ }
+}
+
static int otx2_set_vf_permissions(struct otx2_nic *pf, int vf,
int req_perm)
{
@@ -2348,6 +2470,8 @@ static const struct net_device_ops otx2_netdev_ops = {
.ndo_set_vf_mac = otx2_set_vf_mac,
.ndo_set_vf_vlan = otx2_set_vf_vlan,
.ndo_get_vf_config = otx2_get_vf_config,
+ .ndo_bpf = otx2_xdp,
+ .ndo_xdp_xmit = otx2_xdp_xmit,
.ndo_setup_tc = otx2_setup_tc,
.ndo_set_vf_trust = otx2_ndo_set_vf_trust,
};
@@ -2489,6 +2613,7 @@ static int otx2_probe(struct pci_dev *pdev, const struct pci_device_id *id)
hw->pdev = pdev;
hw->rx_queues = qcount;
hw->tx_queues = qcount;
+ hw->tot_tx_queues = qcount;
hw->max_queues = qcount;

num_vec = pci_msix_vec_count(pdev);
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
index 3f3ec8ffc4dd..2d2b67319340 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
@@ -8,6 +8,8 @@
#include <linux/etherdevice.h>
#include <net/ip.h>
#include <net/tso.h>
+#include <linux/bpf.h>
+#include <linux/bpf_trace.h>

#include "otx2_reg.h"
#include "otx2_common.h"
@@ -17,6 +19,10 @@
#include "cn10k.h"

#define CQE_ADDR(CQ, idx) ((CQ)->cqe_base + ((CQ)->cqe_size * (idx)))
+static bool otx2_xdp_rcv_pkt_handler(struct otx2_nic *pfvf,
+ struct bpf_prog *prog,
+ struct nix_cqe_rx_s *cqe,
+ struct otx2_cq_queue *cq);

static int otx2_nix_cq_op_status(struct otx2_nic *pfvf,
struct otx2_cq_queue *cq)
@@ -98,6 +104,24 @@ static void otx2_dma_unmap_skb_frags(struct otx2_nic *pfvf, struct sg_list *sg)
sg->num_segs = 0;
}

+static void otx2_xdp_snd_pkt_handler(struct otx2_nic *pfvf,
+ struct otx2_snd_queue *sq,
+ struct nix_cqe_tx_s *cqe)
+{
+ struct nix_send_comp_s *snd_comp = &cqe->comp;
+ struct sg_list *sg;
+ struct page *page;
+ u64 pa;
+
+ sg = &sq->sg[snd_comp->sqe_id];
+
+ pa = otx2_iova_to_phys(pfvf->iommu_domain, sg->dma_addr[0]);
+ otx2_dma_unmap_page(pfvf, sg->dma_addr[0],
+ sg->size[0], DMA_TO_DEVICE);
+ page = virt_to_page(phys_to_virt(pa));
+ put_page(page);
+}
+
static void otx2_snd_pkt_handler(struct otx2_nic *pfvf,
struct otx2_cq_queue *cq,
struct otx2_snd_queue *sq,
@@ -310,6 +334,10 @@ static void otx2_rcv_pkt_handler(struct otx2_nic *pfvf,
return;
}

+ if (pfvf->xdp_prog)
+ if (otx2_xdp_rcv_pkt_handler(pfvf, pfvf->xdp_prog, cqe, cq))
+ return;
+
skb = napi_get_frags(napi);
if (unlikely(!skb))
return;
@@ -373,11 +401,6 @@ static int otx2_rx_napi_handler(struct otx2_nic *pfvf,
otx2_write64(pfvf, NIX_LF_CQ_OP_DOOR,
((u64)cq->cq_idx << 32) | processed_cqe);

- if (unlikely(!cq->pool_ptrs))
- return 0;
- /* Refill pool with new buffers */
- pfvf->hw_ops->refill_pool_ptrs(pfvf, cq);
-
return processed_cqe;
}

@@ -397,7 +420,7 @@ void otx2_refill_pool_ptrs(void *dev, struct otx2_cq_queue *cq)
static int otx2_tx_napi_handler(struct otx2_nic *pfvf,
struct otx2_cq_queue *cq, int budget)
{
- int tx_pkts = 0, tx_bytes = 0;
+ int tx_pkts = 0, tx_bytes = 0, qidx;
struct nix_cqe_tx_s *cqe;
int processed_cqe = 0;

@@ -415,9 +438,15 @@ static int otx2_tx_napi_handler(struct otx2_nic *pfvf,
return 0;
break;
}
- otx2_snd_pkt_handler(pfvf, cq, &pfvf->qset.sq[cq->cint_idx],
- cqe, budget, &tx_pkts, &tx_bytes);
-
+ if (cq->cq_type == CQ_XDP) {
+ qidx = cq->cq_idx - pfvf->hw.rx_queues;
+ otx2_xdp_snd_pkt_handler(pfvf, &pfvf->qset.sq[qidx],
+ cqe);
+ } else {
+ otx2_snd_pkt_handler(pfvf, cq,
+ &pfvf->qset.sq[cq->cint_idx],
+ cqe, budget, &tx_pkts, &tx_bytes);
+ }
cqe->hdr.cqe_type = NIX_XQE_TYPE_INVALID;
processed_cqe++;
cq->pend_cqe--;
@@ -443,6 +472,7 @@ static int otx2_tx_napi_handler(struct otx2_nic *pfvf,

int otx2_napi_handler(struct napi_struct *napi, int budget)
{
+ struct otx2_cq_queue *rx_cq = NULL;
struct otx2_cq_poll *cq_poll;
int workdone = 0, cq_idx, i;
struct otx2_cq_queue *cq;
@@ -453,17 +483,13 @@ int otx2_napi_handler(struct napi_struct *napi, int budget)
pfvf = (struct otx2_nic *)cq_poll->dev;
qset = &pfvf->qset;

- for (i = CQS_PER_CINT - 1; i >= 0; i--) {
+ for (i = 0; i < CQS_PER_CINT; i++) {
cq_idx = cq_poll->cq_ids[i];
if (unlikely(cq_idx == CINT_INVALID_CQ))
continue;
cq = &qset->cq[cq_idx];
if (cq->cq_type == CQ_RX) {
- /* If the RQ refill WQ task is running, skip napi
- * scheduler for this queue.
- */
- if (cq->refill_task_sched)
- continue;
+ rx_cq = cq;
workdone += otx2_rx_napi_handler(pfvf, napi,
cq, budget);
} else {
@@ -471,6 +497,8 @@ int otx2_napi_handler(struct napi_struct *napi, int budget)
}
}

+ if (rx_cq && rx_cq->pool_ptrs)
+ pfvf->hw_ops->refill_pool_ptrs(pfvf, rx_cq);
/* Clear the IRQ */
otx2_write64(pfvf, NIX_LF_CINTX_INT(cq_poll->cint_idx), BIT_ULL(0));

@@ -977,6 +1005,9 @@ void otx2_cleanup_rx_cqes(struct otx2_nic *pfvf, struct otx2_cq_queue *cq)
int processed_cqe = 0;
u64 iova, pa;

+ if (pfvf->xdp_prog)
+ xdp_rxq_info_unreg(&cq->xdp_rxq);
+
if (otx2_nix_cq_op_status(pfvf, cq) || !cq->pend_cqe)
return;

@@ -1056,3 +1087,116 @@ int otx2_rxtx_enable(struct otx2_nic *pfvf, bool enable)
mutex_unlock(&pfvf->mbox.lock);
return err;
}
+
+static void otx2_xdp_sqe_add_sg(struct otx2_snd_queue *sq, u64 dma_addr,
+ int len, int *offset)
+{
+ struct nix_sqe_sg_s *sg = NULL;
+ u64 *iova = NULL;
+
+ sg = (struct nix_sqe_sg_s *)(sq->sqe_base + *offset);
+ sg->ld_type = NIX_SEND_LDTYPE_LDD;
+ sg->subdc = NIX_SUBDC_SG;
+ sg->segs = 1;
+ sg->seg1_size = len;
+ iova = (void *)sg + sizeof(*sg);
+ *iova = dma_addr;
+ *offset += sizeof(*sg) + sizeof(u64);
+
+ sq->sg[sq->head].dma_addr[0] = dma_addr;
+ sq->sg[sq->head].size[0] = len;
+ sq->sg[sq->head].num_segs = 1;
+}
+
+bool otx2_xdp_sq_append_pkt(struct otx2_nic *pfvf, u64 iova, int len, u16 qidx)
+{
+ struct nix_sqe_hdr_s *sqe_hdr;
+ struct otx2_snd_queue *sq;
+ int offset, free_sqe;
+
+ sq = &pfvf->qset.sq[qidx];
+ free_sqe = (sq->num_sqbs - *sq->aura_fc_addr) * sq->sqe_per_sqb;
+ if (free_sqe < sq->sqe_thresh)
+ return false;
+
+ memset(sq->sqe_base + 8, 0, sq->sqe_size - 8);
+
+ sqe_hdr = (struct nix_sqe_hdr_s *)(sq->sqe_base);
+
+ if (!sqe_hdr->total) {
+ sqe_hdr->aura = sq->aura_id;
+ sqe_hdr->df = 1;
+ sqe_hdr->sq = qidx;
+ sqe_hdr->pnc = 1;
+ }
+ sqe_hdr->total = len;
+ sqe_hdr->sqe_id = sq->head;
+
+ offset = sizeof(*sqe_hdr);
+
+ otx2_xdp_sqe_add_sg(sq, iova, len, &offset);
+ sqe_hdr->sizem1 = (offset / 16) - 1;
+ pfvf->hw_ops->sqe_flush(pfvf, sq, offset, qidx);
+
+ return true;
+}
+
+static bool otx2_xdp_rcv_pkt_handler(struct otx2_nic *pfvf,
+ struct bpf_prog *prog,
+ struct nix_cqe_rx_s *cqe,
+ struct otx2_cq_queue *cq)
+{
+ unsigned char *hard_start, *data;
+ int qidx = cq->cq_idx;
+ struct xdp_buff xdp;
+ struct page *page;
+ u64 iova, pa;
+ u32 act;
+ int err;
+
+ iova = cqe->sg.seg_addr - OTX2_HEAD_ROOM;
+ pa = otx2_iova_to_phys(pfvf->iommu_domain, iova);
+ page = virt_to_page(phys_to_virt(pa));
+
+ xdp_init_buff(&xdp, pfvf->rbsize, &cq->xdp_rxq);
+
+ data = (unsigned char *)phys_to_virt(pa);
+ hard_start = page_address(page);
+ xdp_prepare_buff(&xdp, hard_start, data - hard_start,
+ cqe->sg.seg_size, false);
+
+ act = bpf_prog_run_xdp(prog, &xdp);
+
+ switch (act) {
+ case XDP_PASS:
+ break;
+ case XDP_TX:
+ qidx += pfvf->hw.tx_queues;
+ cq->pool_ptrs++;
+ return otx2_xdp_sq_append_pkt(pfvf, iova,
+ cqe->sg.seg_size, qidx);
+ case XDP_REDIRECT:
+ cq->pool_ptrs++;
+ err = xdp_do_redirect(pfvf->netdev, &xdp, prog);
+
+ otx2_dma_unmap_page(pfvf, iova, pfvf->rbsize,
+ DMA_FROM_DEVICE);
+ if (!err)
+ return true;
+ put_page(page);
+ break;
+ default:
+ bpf_warn_invalid_xdp_action(act);
+ break;
+ case XDP_ABORTED:
+ trace_xdp_exception(pfvf->netdev, prog, act);
+ break;
+ case XDP_DROP:
+ otx2_dma_unmap_page(pfvf, iova, pfvf->rbsize,
+ DMA_FROM_DEVICE);
+ put_page(page);
+ cq->pool_ptrs++;
+ return true;
+ }
+ return false;
+}
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.h b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.h
index 6a97631ff226..5c05774a8d05 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.h
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.h
@@ -11,6 +11,7 @@
#include <linux/etherdevice.h>
#include <linux/iommu.h>
#include <linux/if_vlan.h>
+#include <net/xdp.h>

#define LBK_CHAN_BASE 0x000
#define SDP_CHAN_BASE 0x700
@@ -25,6 +26,8 @@
#define OTX2_MAX_GSO_SEGS 255
#define OTX2_MAX_FRAGS_IN_SQE 9

+#define MAX_XDP_MTU (1530 - OTX2_ETH_HLEN)
+
/* Rx buffer size should be in multiples of 128bytes */
#define RCV_FRAG_LEN1(x) \
((OTX2_HEAD_ROOM + OTX2_DATA_ALIGN(x)) + \
@@ -99,7 +102,8 @@ struct otx2_snd_queue {
enum cq_type {
CQ_RX,
CQ_TX,
- CQS_PER_CINT = 2, /* RQ + SQ */
+ CQ_XDP,
+ CQS_PER_CINT = 3, /* RQ + SQ + XDP */
};

struct otx2_cq_poll {
@@ -130,6 +134,7 @@ struct otx2_cq_queue {
void *cqe_base;
struct qmem *cqe;
struct otx2_pool *rbpool;
+ struct xdp_rxq_info xdp_rxq;
} ____cacheline_aligned_in_smp;

struct otx2_qset {
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
index 03b4ec630432..05d6fb3c010a 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
@@ -583,6 +583,7 @@ static int otx2vf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
hw->rx_queues = qcount;
hw->tx_queues = qcount;
hw->max_queues = qcount;
+ hw->tot_tx_queues = qcount;

hw->irq_name = devm_kmalloc_array(&hw->pdev->dev, num_vec, NAME_SIZE,
GFP_KERNEL);
--
2.17.1