Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:

 1) Significantly shrink the core networking routing structures. Result
    of http://vger.kernel.org/~davem/seoul2017_netdev_keynote.pdf

 2) Add netdevsim driver for testing various offloads, from Jakub
    Kicinski.

 3) Support cross-chip FDB operations in DSA, from Vivien Didelot.

 4) Add a 2nd listener hash table for TCP, similar to what was done for
    UDP. From Martin KaFai Lau.

 5) Add eBPF based queue selection to tun, from Jason Wang.

 6) Lockless qdisc support, from John Fastabend.

 7) SCTP stream interleave support, from Xin Long.

 8) Smoother TCP receive autotuning, from Eric Dumazet.

 9) Lots of erspan tunneling enhancements, from William Tu.

10) Add true function call support to BPF, from Alexei Starovoitov.

11) Add explicit support for GRO HW offloading, from Michael Chan.

12) Support extack generation in more netlink subsystems. From Alexander
    Aring, Quentin Monnet, and Jakub Kicinski.

13) Add 1000BaseX, flow control, and EEE support to mvneta driver. From
    Russell King.

14) Add flow table abstraction to netfilter, from Pablo Neira Ayuso.

15) Many improvements and simplifications to the NFP driver bpf JIT,
    from Jakub Kicinski.

16) Support for ipv6 non-equal cost multipath routing, from Ido
    Schimmel.

17) Add resource abstration to devlink, from Arkadi Sharshevsky.

18) Packet scheduler classifier shared filter block support, from Jiri
    Pirko.

19) Avoid locking in act_csum, from Davide Caratti.

20) devinet_ioctl() simplifications from Al viro.

21) More TCP bpf improvements from Lawrence Brakmo.

22) Add support for onlink ipv6 route flag, similar to ipv4, from David
    Ahern.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1925 commits)
  tls: Add support for encryption using async offload accelerator
  ip6mr: fix stale iterator
  net/sched: kconfig: Remove blank help texts
  openvswitch: meter: Use 64-bit arithmetic instead of 32-bit
  tcp_nv: fix potential integer overflow in tcpnv_acked
  r8169: fix RTL8168EP take too long to complete driver initialization.
  qmi_wwan: Add support for Quectel EP06
  rtnetlink: enable IFLA_IF_NETNSID for RTM_NEWLINK
  ipmr: Fix ptrdiff_t print formatting
  ibmvnic: Wait for device response when changing MAC
  qlcnic: fix deadlock bug
  tcp: release sk_frag.page in tcp_disconnect
  ipv4: Get the address of interface correctly.
  net_sched: gen_estimator: fix lockdep splat
  net: macb: Handle HRESP error
  net/mlx5e: IPoIB, Fix copy-paste bug in flow steering refactoring
  ipv6: addrconf: break critical section in addrconf_verify_rtnl()
  ipv6: change route cache aging logic
  i40e/i40evf: Update DESC_NEEDED value to reflect larger value
  bnxt_en: cleanup DIM work on device shutdown
  ...

1 files changed, 264 insertions, 33 deletions

diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
index a063c36..b68cde9 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
@@ -20,13 +20,15 @@
 #include <linux/bpf.h>
 #include <linux/bpf_trace.h>
 #include <linux/filter.h>
+#include <linux/net_tstamp.h>
 
 #include "nic_reg.h"
 #include "nic.h"
 #include "nicvf_queues.h"
 #include "thunder_bgx.h"
+#include "../common/cavium_ptp.h"
 
-#define DRV_NAME	"thunder-nicvf"
+#define DRV_NAME	"nicvf"
 #define DRV_VERSION	"1.0"
 
 /* Supported devices */
@@ -65,6 +67,11 @@ module_param(cpi_alg, int, S_IRUGO);
 MODULE_PARM_DESC(cpi_alg,
 		 "PFC algorithm (0=none, 1=VLAN, 2=VLAN16, 3=IP Diffserv)");
 
+struct nicvf_xdp_tx {
+	u64 dma_addr;
+	u8  qidx;
+};
+
 static inline u8 nicvf_netdev_qidx(struct nicvf *nic, u8 qidx)
 {
 	if (nic->sqs_mode)
@@ -500,14 +507,29 @@ static int nicvf_init_resources(struct nicvf *nic)
 	return 0;
 }
 
+static void nicvf_unmap_page(struct nicvf *nic, struct page *page, u64 dma_addr)
+{
+	/* Check if it's a recycled page, if not unmap the DMA mapping.
+	 * Recycled page holds an extra reference.
+	 */
+	if (page_ref_count(page) == 1) {
+		dma_addr &= PAGE_MASK;
+		dma_unmap_page_attrs(&nic->pdev->dev, dma_addr,
+				     RCV_FRAG_LEN + XDP_HEADROOM,
+				     DMA_FROM_DEVICE,
+				     DMA_ATTR_SKIP_CPU_SYNC);
+	}
+}
+
 static inline bool nicvf_xdp_rx(struct nicvf *nic, struct bpf_prog *prog,
 				struct cqe_rx_t *cqe_rx, struct snd_queue *sq,
-				struct sk_buff **skb)
+				struct rcv_queue *rq, struct sk_buff **skb)
 {
 	struct xdp_buff xdp;
 	struct page *page;
+	struct nicvf_xdp_tx *xdp_tx = NULL;
 	u32 action;
-	u16 len, offset = 0;
+	u16 len, err, offset = 0;
 	u64 dma_addr, cpu_addr;
 	void *orig_data;
 
@@ -521,10 +543,11 @@ static inline bool nicvf_xdp_rx(struct nicvf *nic, struct bpf_prog *prog,
 	cpu_addr = (u64)phys_to_virt(cpu_addr);
 	page = virt_to_page((void *)cpu_addr);
 
-	xdp.data_hard_start = page_address(page);
+	xdp.data_hard_start = page_address(page) + RCV_BUF_HEADROOM;
 	xdp.data = (void *)cpu_addr;
 	xdp_set_data_meta_invalid(&xdp);
 	xdp.data_end = xdp.data + len;
+	xdp.rxq = &rq->xdp_rxq;
 	orig_data = xdp.data;
 
 	rcu_read_lock();
@@ -540,18 +563,7 @@ static inline bool nicvf_xdp_rx(struct nicvf *nic, struct bpf_prog *prog,
 
 	switch (action) {
 	case XDP_PASS:
-		/* Check if it's a recycled page, if not
-		 * unmap the DMA mapping.
-		 *
-		 * Recycled page holds an extra reference.
-		 */
-		if (page_ref_count(page) == 1) {
-			dma_addr &= PAGE_MASK;
-			dma_unmap_page_attrs(&nic->pdev->dev, dma_addr,
-					     RCV_FRAG_LEN + XDP_PACKET_HEADROOM,
-					     DMA_FROM_DEVICE,
-					     DMA_ATTR_SKIP_CPU_SYNC);
-		}
+		nicvf_unmap_page(nic, page, dma_addr);
 
 		/* Build SKB and pass on packet to network stack */
 		*skb = build_skb(xdp.data,
@@ -564,6 +576,20 @@ static inline bool nicvf_xdp_rx(struct nicvf *nic, struct bpf_prog *prog,
 	case XDP_TX:
 		nicvf_xdp_sq_append_pkt(nic, sq, (u64)xdp.data, dma_addr, len);
 		return true;
+	case XDP_REDIRECT:
+		/* Save DMA address for use while transmitting */
+		xdp_tx = (struct nicvf_xdp_tx *)page_address(page);
+		xdp_tx->dma_addr = dma_addr;
+		xdp_tx->qidx = nicvf_netdev_qidx(nic, cqe_rx->rq_idx);
+
+		err = xdp_do_redirect(nic->pnicvf->netdev, &xdp, prog);
+		if (!err)
+			return true;
+
+		/* Free the page on error */
+		nicvf_unmap_page(nic, page, dma_addr);
+		put_page(page);
+		break;
 	default:
 		bpf_warn_invalid_xdp_action(action);
 		/* fall through */
@@ -571,24 +597,51 @@ static inline bool nicvf_xdp_rx(struct nicvf *nic, struct bpf_prog *prog,
 		trace_xdp_exception(nic->netdev, prog, action);
 		/* fall through */
 	case XDP_DROP:
-		/* Check if it's a recycled page, if not
-		 * unmap the DMA mapping.
-		 *
-		 * Recycled page holds an extra reference.
-		 */
-		if (page_ref_count(page) == 1) {
-			dma_addr &= PAGE_MASK;
-			dma_unmap_page_attrs(&nic->pdev->dev, dma_addr,
-					     RCV_FRAG_LEN + XDP_PACKET_HEADROOM,
-					     DMA_FROM_DEVICE,
-					     DMA_ATTR_SKIP_CPU_SYNC);
-		}
+		nicvf_unmap_page(nic, page, dma_addr);
 		put_page(page);
 		return true;
 	}
 	return false;
 }
 
+static void nicvf_snd_ptp_handler(struct net_device *netdev,
+				  struct cqe_send_t *cqe_tx)
+{
+	struct nicvf *nic = netdev_priv(netdev);
+	struct skb_shared_hwtstamps ts;
+	u64 ns;
+
+	nic = nic->pnicvf;
+
+	/* Sync for 'ptp_skb' */
+	smp_rmb();
+
+	/* New timestamp request can be queued now */
+	atomic_set(&nic->tx_ptp_skbs, 0);
+
+	/* Check for timestamp requested skb */
+	if (!nic->ptp_skb)
+		return;
+
+	/* Check if timestamping is timedout, which is set to 10us */
+	if (cqe_tx->send_status == CQ_TX_ERROP_TSTMP_TIMEOUT ||
+	    cqe_tx->send_status == CQ_TX_ERROP_TSTMP_CONFLICT)
+		goto no_tstamp;
+
+	/* Get the timestamp */
+	memset(&ts, 0, sizeof(ts));
+	ns = cavium_ptp_tstamp2time(nic->ptp_clock, cqe_tx->ptp_timestamp);
+	ts.hwtstamp = ns_to_ktime(ns);
+	skb_tstamp_tx(nic->ptp_skb, &ts);
+
+no_tstamp:
+	/* Free the original skb */
+	dev_kfree_skb_any(nic->ptp_skb);
+	nic->ptp_skb = NULL;
+	/* Sync 'ptp_skb' */
+	smp_wmb();
+}
+
 static void nicvf_snd_pkt_handler(struct net_device *netdev,
 				  struct cqe_send_t *cqe_tx,
 				  int budget, int *subdesc_cnt,
@@ -645,7 +698,12 @@ static void nicvf_snd_pkt_handler(struct net_device *netdev,
 		prefetch(skb);
 		(*tx_pkts)++;
 		*tx_bytes += skb->len;
-		napi_consume_skb(skb, budget);
+		/* If timestamp is requested for this skb, don't free it */
+		if (skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS &&
+		    !nic->pnicvf->ptp_skb)
+			nic->pnicvf->ptp_skb = skb;
+		else
+			napi_consume_skb(skb, budget);
 		sq->skbuff[cqe_tx->sqe_ptr] = (u64)NULL;
 	} else {
 		/* In case of SW TSO on 88xx, only last segment will have
@@ -684,9 +742,25 @@ static inline void nicvf_set_rxhash(struct net_device *netdev,
 	skb_set_hash(skb, hash, hash_type);
 }
 
+static inline void nicvf_set_rxtstamp(struct nicvf *nic, struct sk_buff *skb)
+{
+	u64 ns;
+
+	if (!nic->ptp_clock || !nic->hw_rx_tstamp)
+		return;
+
+	/* The first 8 bytes is the timestamp */
+	ns = cavium_ptp_tstamp2time(nic->ptp_clock,
+				    be64_to_cpu(*(__be64 *)skb->data));
+	skb_hwtstamps(skb)->hwtstamp = ns_to_ktime(ns);
+
+	__skb_pull(skb, 8);
+}
+
 static void nicvf_rcv_pkt_handler(struct net_device *netdev,
 				  struct napi_struct *napi,
-				  struct cqe_rx_t *cqe_rx, struct snd_queue *sq)
+				  struct cqe_rx_t *cqe_rx,
+				  struct snd_queue *sq, struct rcv_queue *rq)
 {
 	struct sk_buff *skb = NULL;
 	struct nicvf *nic = netdev_priv(netdev);
@@ -712,7 +786,7 @@ static void nicvf_rcv_pkt_handler(struct net_device *netdev,
 	/* For XDP, ignore pkts spanning multiple pages */
 	if (nic->xdp_prog && (cqe_rx->rb_cnt == 1)) {
 		/* Packet consumed by XDP */
-		if (nicvf_xdp_rx(snic, nic->xdp_prog, cqe_rx, sq, &skb))
+		if (nicvf_xdp_rx(snic, nic->xdp_prog, cqe_rx, sq, rq, &skb))
 			return;
 	} else {
 		skb = nicvf_get_rcv_skb(snic, cqe_rx,
@@ -734,6 +808,7 @@ static void nicvf_rcv_pkt_handler(struct net_device *netdev,
 		return;
 	}
 
+	nicvf_set_rxtstamp(nic, skb);
 	nicvf_set_rxhash(netdev, cqe_rx, skb);
 
 	skb_record_rx_queue(skb, rq_idx);
@@ -769,6 +844,7 @@ static int nicvf_cq_intr_handler(struct net_device *netdev, u8 cq_idx,
 	struct cqe_rx_t *cq_desc;
 	struct netdev_queue *txq;
 	struct snd_queue *sq = &qs->sq[cq_idx];
+	struct rcv_queue *rq = &qs->rq[cq_idx];
 	unsigned int tx_pkts = 0, tx_bytes = 0, txq_idx;
 
 	spin_lock_bh(&cq->lock);
@@ -799,7 +875,7 @@ loop:
 
 		switch (cq_desc->cqe_type) {
 		case CQE_TYPE_RX:
-			nicvf_rcv_pkt_handler(netdev, napi, cq_desc, sq);
+			nicvf_rcv_pkt_handler(netdev, napi, cq_desc, sq, rq);
 			work_done++;
 		break;
 		case CQE_TYPE_SEND:
@@ -808,10 +884,12 @@ loop:
 					      &tx_pkts, &tx_bytes);
 			tx_done++;
 		break;
+		case CQE_TYPE_SEND_PTP:
+			nicvf_snd_ptp_handler(netdev, (void *)cq_desc);
+		break;
 		case CQE_TYPE_INVALID:
 		case CQE_TYPE_RX_SPLIT:
 		case CQE_TYPE_RX_TCP:
-		case CQE_TYPE_SEND_PTP:
 			/* Ignore for now */
 		break;
 		}
@@ -1307,12 +1385,28 @@ int nicvf_stop(struct net_device *netdev)
 
 	nicvf_free_cq_poll(nic);
 
+	/* Free any pending SKB saved to receive timestamp */
+	if (nic->ptp_skb) {
+		dev_kfree_skb_any(nic->ptp_skb);
+		nic->ptp_skb = NULL;
+	}
+
 	/* Clear multiqset info */
 	nic->pnicvf = nic;
 
 	return 0;
 }
 
+static int nicvf_config_hw_rx_tstamp(struct nicvf *nic, bool enable)
+{
+	union nic_mbx mbx = {};
+
+	mbx.ptp.msg = NIC_MBOX_MSG_PTP_CFG;
+	mbx.ptp.enable = enable;
+
+	return nicvf_send_msg_to_pf(nic, &mbx);
+}
+
 static int nicvf_update_hw_max_frs(struct nicvf *nic, int mtu)
 {
 	union nic_mbx mbx = {};
@@ -1382,6 +1476,12 @@ int nicvf_open(struct net_device *netdev)
 	if (nic->sqs_mode)
 		nicvf_get_primary_vf_struct(nic);
 
+	/* Configure PTP timestamp */
+	if (nic->ptp_clock)
+		nicvf_config_hw_rx_tstamp(nic, nic->hw_rx_tstamp);
+	atomic_set(&nic->tx_ptp_skbs, 0);
+	nic->ptp_skb = NULL;
+
 	/* Configure receive side scaling and MTU */
 	if (!nic->sqs_mode) {
 		nicvf_rss_init(nic);
@@ -1764,6 +1864,117 @@ static int nicvf_xdp(struct net_device *netdev, struct netdev_bpf *xdp)
 	}
 }
 
+static int nicvf_xdp_xmit(struct net_device *netdev, struct xdp_buff *xdp)
+{
+	struct nicvf *nic = netdev_priv(netdev);
+	struct nicvf *snic = nic;
+	struct nicvf_xdp_tx *xdp_tx;
+	struct snd_queue *sq;
+	struct page *page;
+	int err, qidx;
+
+	if (!netif_running(netdev) || !nic->xdp_prog)
+		return -EINVAL;
+
+	page = virt_to_page(xdp->data);
+	xdp_tx = (struct nicvf_xdp_tx *)page_address(page);
+	qidx = xdp_tx->qidx;
+
+	if (xdp_tx->qidx >= nic->xdp_tx_queues)
+		return -EINVAL;
+
+	/* Get secondary Qset's info */
+	if (xdp_tx->qidx >= MAX_SND_QUEUES_PER_QS) {
+		qidx = xdp_tx->qidx / MAX_SND_QUEUES_PER_QS;
+		snic = (struct nicvf *)nic->snicvf[qidx - 1];
+		if (!snic)
+			return -EINVAL;
+		qidx = xdp_tx->qidx % MAX_SND_QUEUES_PER_QS;
+	}
+
+	sq = &snic->qs->sq[qidx];
+	err = nicvf_xdp_sq_append_pkt(snic, sq, (u64)xdp->data,
+				      xdp_tx->dma_addr,
+				      xdp->data_end - xdp->data);
+	if (err)
+		return -ENOMEM;
+
+	nicvf_xdp_sq_doorbell(snic, sq, qidx);
+	return 0;
+}
+
+static void nicvf_xdp_flush(struct net_device *dev)
+{
+	return;
+}
+
+static int nicvf_config_hwtstamp(struct net_device *netdev, struct ifreq *ifr)
+{
+	struct hwtstamp_config config;
+	struct nicvf *nic = netdev_priv(netdev);
+
+	if (!nic->ptp_clock)
+		return -ENODEV;
+
+	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
+		return -EFAULT;
+
+	/* reserved for future extensions */
+	if (config.flags)
+		return -EINVAL;
+
+	switch (config.tx_type) {
+	case HWTSTAMP_TX_OFF:
+	case HWTSTAMP_TX_ON:
+		break;
+	default:
+		return -ERANGE;
+	}
+
+	switch (config.rx_filter) {
+	case HWTSTAMP_FILTER_NONE:
+		nic->hw_rx_tstamp = false;
+		break;
+	case HWTSTAMP_FILTER_ALL:
+	case HWTSTAMP_FILTER_SOME:
+	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
+	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
+	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V2_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
+		nic->hw_rx_tstamp = true;
+		config.rx_filter = HWTSTAMP_FILTER_ALL;
+		break;
+	default:
+		return -ERANGE;
+	}
+
+	if (netif_running(netdev))
+		nicvf_config_hw_rx_tstamp(nic, nic->hw_rx_tstamp);
+
+	if (copy_to_user(ifr->ifr_data, &config, sizeof(config)))
+		return -EFAULT;
+
+	return 0;
+}
+
+static int nicvf_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
+{
+	switch (cmd) {
+	case SIOCSHWTSTAMP:
+		return nicvf_config_hwtstamp(netdev, req);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
 static const struct net_device_ops nicvf_netdev_ops = {
 	.ndo_open		= nicvf_open,
 	.ndo_stop		= nicvf_stop,
@@ -1775,6 +1986,9 @@ static const struct net_device_ops nicvf_netdev_ops = {
 	.ndo_fix_features       = nicvf_fix_features,
 	.ndo_set_features       = nicvf_set_features,
 	.ndo_bpf		= nicvf_xdp,
+	.ndo_xdp_xmit		= nicvf_xdp_xmit,
+	.ndo_xdp_flush          = nicvf_xdp_flush,
+	.ndo_do_ioctl           = nicvf_ioctl,
 };
 
 static int nicvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
@@ -1784,6 +1998,16 @@ static int nicvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	struct nicvf *nic;
 	int    err, qcount;
 	u16    sdevid;
+	struct cavium_ptp *ptp_clock;
+
+	ptp_clock = cavium_ptp_get();
+	if (IS_ERR(ptp_clock)) {
+		if (PTR_ERR(ptp_clock) == -ENODEV)
+			/* In virtualized environment we proceed without ptp */
+			ptp_clock = NULL;
+		else
+			return PTR_ERR(ptp_clock);
+	}
 
 	err = pci_enable_device(pdev);
 	if (err) {
@@ -1833,6 +2057,12 @@ static int nicvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	nic->pdev = pdev;
 	nic->pnicvf = nic;
 	nic->max_queues = qcount;
+	/* If no of CPUs are too low, there won't be any queues left
+	 * for XDP_TX, hence double it.
+	 */
+	if (!nic->t88)
+		nic->max_queues *= 2;
+	nic->ptp_clock = ptp_clock;
 
 	/* MAP VF's configuration registers */
 	nic->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0);
@@ -1946,6 +2176,7 @@ static void nicvf_remove(struct pci_dev *pdev)
 	pci_set_drvdata(pdev, NULL);
 	if (nic->drv_stats)
 		free_percpu(nic->drv_stats);
+	cavium_ptp_put(nic->ptp_clock);
 	free_netdev(netdev);
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);