1 files changed, 323 insertions, 78 deletions

diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
index e42d0fdefee1..f65041662173 100644
--- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c
+++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
@@ -47,6 +47,9 @@
 						 NETIF_F_HW_HSR_TAG_INS | \
 						 NETIF_F_HW_HSR_TAG_RM)
 
+#define PRUETH_RX_DMA_ATTR			(DMA_ATTR_SKIP_CPU_SYNC |\
+						 DMA_ATTR_WEAK_ORDERING)
+
 /* CTRLMMR_ICSSG_RGMII_CTRL register bits */
 #define ICSSG_CTRL_RGMII_ID_MODE                BIT(24)
 
@@ -392,7 +395,11 @@ static enum hrtimer_restart emac_rx_timer_callback(struct hrtimer *timer)
 			container_of(timer, struct prueth_emac, rx_hrtimer);
 	int rx_flow = PRUETH_RX_FLOW_DATA;
 
-	enable_irq(emac->rx_chns.irq[rx_flow]);
+	if (emac->rx_chns.irq_disabled) {
+		/* re-enable the RX IRQ */
+		emac->rx_chns.irq_disabled = false;
+		enable_irq(emac->rx_chns.irq[rx_flow]);
+	}
 	return HRTIMER_NORESTART;
 }
 
@@ -566,31 +573,41 @@ const struct icss_iep_clockops prueth_iep_clockops = {
 	.perout_enable = prueth_perout_enable,
 };
 
+static void prueth_destroy_xdp_rxqs(struct prueth_emac *emac)
+{
+	struct xdp_rxq_info *rxq = &emac->rx_chns.xdp_rxq;
+
+	if (xdp_rxq_info_is_reg(rxq))
+		xdp_rxq_info_unreg(rxq);
+}
+
 static int prueth_create_xdp_rxqs(struct prueth_emac *emac)
 {
 	struct xdp_rxq_info *rxq = &emac->rx_chns.xdp_rxq;
 	struct page_pool *pool = emac->rx_chns.pg_pool;
+	struct prueth_rx_chn *rx_chn = &emac->rx_chns;
 	int ret;
 
 	ret = xdp_rxq_info_reg(rxq, emac->ndev, 0, emac->napi_rx.napi_id);
 	if (ret)
 		return ret;
 
-	ret = xdp_rxq_info_reg_mem_model(rxq, MEM_TYPE_PAGE_POOL, pool);
-	if (ret)
-		xdp_rxq_info_unreg(rxq);
-
-	return ret;
-}
-
-static void prueth_destroy_xdp_rxqs(struct prueth_emac *emac)
-{
-	struct xdp_rxq_info *rxq = &emac->rx_chns.xdp_rxq;
+	if (rx_chn->xsk_pool) {
+		ret = xdp_rxq_info_reg_mem_model(rxq, MEM_TYPE_XSK_BUFF_POOL, NULL);
+		if (ret)
+			goto xdp_unreg;
+		xsk_pool_set_rxq_info(rx_chn->xsk_pool, rxq);
+	} else {
+		ret = xdp_rxq_info_reg_mem_model(rxq, MEM_TYPE_PAGE_POOL, pool);
+		if (ret)
+			goto xdp_unreg;
+	}
 
-	if (!xdp_rxq_info_is_reg(rxq))
-		return;
+	return 0;
 
-	xdp_rxq_info_unreg(rxq);
+xdp_unreg:
+	prueth_destroy_xdp_rxqs(emac);
+	return ret;
 }
 
 static int icssg_prueth_add_mcast(struct net_device *ndev, const u8 *addr)
@@ -735,6 +752,128 @@ static int icssg_update_vlan_mcast(struct net_device *vdev, int vid,
 	return 0;
 }
 
+static void prueth_set_xsk_pool(struct prueth_emac *emac, u16 queue_id)
+{
+	struct prueth_tx_chn *tx_chn = &emac->tx_chns[queue_id];
+	struct prueth_rx_chn *rx_chn = &emac->rx_chns;
+
+	if (emac->xsk_qid != queue_id) {
+		rx_chn->xsk_pool = NULL;
+		tx_chn->xsk_pool = NULL;
+	} else {
+		rx_chn->xsk_pool = xsk_get_pool_from_qid(emac->ndev, queue_id);
+		tx_chn->xsk_pool = xsk_get_pool_from_qid(emac->ndev, queue_id);
+	}
+}
+
+static void prueth_destroy_txq(struct prueth_emac *emac)
+{
+	int ret, i;
+
+	atomic_set(&emac->tdown_cnt, emac->tx_ch_num);
+	/* ensure new tdown_cnt value is visible */
+	smp_mb__after_atomic();
+	/* tear down and disable UDMA channels */
+	reinit_completion(&emac->tdown_complete);
+	for (i = 0; i < emac->tx_ch_num; i++)
+		k3_udma_glue_tdown_tx_chn(emac->tx_chns[i].tx_chn, false);
+
+	ret = wait_for_completion_timeout(&emac->tdown_complete,
+					  msecs_to_jiffies(1000));
+	if (!ret)
+		netdev_err(emac->ndev, "tx teardown timeout\n");
+
+	for (i = 0; i < emac->tx_ch_num; i++) {
+		napi_disable(&emac->tx_chns[i].napi_tx);
+		hrtimer_cancel(&emac->tx_chns[i].tx_hrtimer);
+		k3_udma_glue_reset_tx_chn(emac->tx_chns[i].tx_chn,
+					  &emac->tx_chns[i],
+					  prueth_tx_cleanup);
+		k3_udma_glue_disable_tx_chn(emac->tx_chns[i].tx_chn);
+	}
+}
+
+static void prueth_destroy_rxq(struct prueth_emac *emac)
+{
+	int i, ret;
+
+	/* tear down and disable UDMA channels */
+	reinit_completion(&emac->tdown_complete);
+	k3_udma_glue_tdown_rx_chn(emac->rx_chns.rx_chn, true);
+
+	/* When RX DMA Channel Teardown is initiated, it will result in an
+	 * interrupt and a Teardown Completion Marker (TDCM) is queued into
+	 * the RX Completion queue. Acknowledging the interrupt involves
+	 * popping the TDCM descriptor from the RX Completion queue via the
+	 * RX NAPI Handler. To avoid timing out when waiting for the TDCM to
+	 * be popped, schedule the RX NAPI handler to run immediately.
+	 */
+	if (!napi_if_scheduled_mark_missed(&emac->napi_rx)) {
+		if (napi_schedule_prep(&emac->napi_rx))
+			__napi_schedule(&emac->napi_rx);
+	}
+
+	ret = wait_for_completion_timeout(&emac->tdown_complete,
+					  msecs_to_jiffies(1000));
+	if (!ret)
+		netdev_err(emac->ndev, "rx teardown timeout\n");
+
+	for (i = 0; i < PRUETH_MAX_RX_FLOWS; i++) {
+		napi_disable(&emac->napi_rx);
+		hrtimer_cancel(&emac->rx_hrtimer);
+		k3_udma_glue_reset_rx_chn(emac->rx_chns.rx_chn, i,
+					  &emac->rx_chns,
+					  prueth_rx_cleanup);
+	}
+
+	prueth_destroy_xdp_rxqs(emac);
+	k3_udma_glue_disable_rx_chn(emac->rx_chns.rx_chn);
+}
+
+static int prueth_create_txq(struct prueth_emac *emac)
+{
+	int ret, i;
+
+	for (i = 0; i < emac->tx_ch_num; i++) {
+		ret = k3_udma_glue_enable_tx_chn(emac->tx_chns[i].tx_chn);
+		if (ret)
+			goto reset_tx_chan;
+		napi_enable(&emac->tx_chns[i].napi_tx);
+	}
+	return 0;
+
+reset_tx_chan:
+	/* Since interface is not yet up, there is wouldn't be
+	 * any SKB for completion. So set false to free_skb
+	 */
+	prueth_reset_tx_chan(emac, i, false);
+	return ret;
+}
+
+static int prueth_create_rxq(struct prueth_emac *emac)
+{
+	int ret;
+
+	ret = prueth_prepare_rx_chan(emac, &emac->rx_chns, PRUETH_MAX_PKT_SIZE);
+	if (ret)
+		return ret;
+
+	ret = k3_udma_glue_enable_rx_chn(emac->rx_chns.rx_chn);
+	if (ret)
+		goto reset_rx_chn;
+
+	ret = prueth_create_xdp_rxqs(emac);
+	if (ret)
+		goto reset_rx_chn;
+
+	napi_enable(&emac->napi_rx);
+	return 0;
+
+reset_rx_chn:
+	prueth_reset_rx_chan(&emac->rx_chns, PRUETH_MAX_RX_FLOWS, false);
+	return ret;
+}
+
 /**
  * emac_ndo_open - EMAC device open
  * @ndev: network adapter device
@@ -746,7 +885,7 @@ static int icssg_update_vlan_mcast(struct net_device *vdev, int vid,
 static int emac_ndo_open(struct net_device *ndev)
 {
 	struct prueth_emac *emac = netdev_priv(ndev);
-	int ret, i, num_data_chn = emac->tx_ch_num;
+	int ret, num_data_chn = emac->tx_ch_num;
 	struct icssg_flow_cfg __iomem *flow_cfg;
 	struct prueth *prueth = emac->prueth;
 	int slice = prueth_emac_slice(emac);
@@ -767,6 +906,7 @@ static int emac_ndo_open(struct net_device *ndev)
 		return ret;
 	}
 
+	emac->xsk_qid = -EINVAL;
 	init_completion(&emac->cmd_complete);
 	ret = prueth_init_tx_chns(emac);
 	if (ret) {
@@ -819,28 +959,13 @@ static int emac_ndo_open(struct net_device *ndev)
 		goto stop;
 
 	/* Prepare RX */
-	ret = prueth_prepare_rx_chan(emac, &emac->rx_chns, PRUETH_MAX_PKT_SIZE);
+	ret = prueth_create_rxq(emac);
 	if (ret)
 		goto free_tx_ts_irq;
 
-	ret = prueth_create_xdp_rxqs(emac);
-	if (ret)
-		goto reset_rx_chn;
-
-	ret = k3_udma_glue_enable_rx_chn(emac->rx_chns.rx_chn);
+	ret = prueth_create_txq(emac);
 	if (ret)
-		goto destroy_xdp_rxqs;
-
-	for (i = 0; i < emac->tx_ch_num; i++) {
-		ret = k3_udma_glue_enable_tx_chn(emac->tx_chns[i].tx_chn);
-		if (ret)
-			goto reset_tx_chan;
-	}
-
-	/* Enable NAPI in Tx and Rx direction */
-	for (i = 0; i < emac->tx_ch_num; i++)
-		napi_enable(&emac->tx_chns[i].napi_tx);
-	napi_enable(&emac->napi_rx);
+		goto destroy_rxq;
 
 	/* start PHY */
 	phy_start(ndev->phydev);
@@ -851,15 +976,8 @@ static int emac_ndo_open(struct net_device *ndev)
 
 	return 0;
 
-reset_tx_chan:
-	/* Since interface is not yet up, there is wouldn't be
-	 * any SKB for completion. So set false to free_skb
-	 */
-	prueth_reset_tx_chan(emac, i, false);
-destroy_xdp_rxqs:
-	prueth_destroy_xdp_rxqs(emac);
-reset_rx_chn:
-	prueth_reset_rx_chan(&emac->rx_chns, max_rx_flows, false);
+destroy_rxq:
+	prueth_destroy_rxq(emac);
 free_tx_ts_irq:
 	free_irq(emac->tx_ts_irq, emac);
 stop:
@@ -889,9 +1007,6 @@ static int emac_ndo_stop(struct net_device *ndev)
 {
 	struct prueth_emac *emac = netdev_priv(ndev);
 	struct prueth *prueth = emac->prueth;
-	int rx_flow = PRUETH_RX_FLOW_DATA;
-	int max_rx_flows;
-	int ret, i;
 
 	/* inform the upper layers. */
 	netif_tx_stop_all_queues(ndev);
@@ -905,32 +1020,8 @@ static int emac_ndo_stop(struct net_device *ndev)
 	else
 		__dev_mc_unsync(ndev, icssg_prueth_del_mcast);
 
-	atomic_set(&emac->tdown_cnt, emac->tx_ch_num);
-	/* ensure new tdown_cnt value is visible */
-	smp_mb__after_atomic();
-	/* tear down and disable UDMA channels */
-	reinit_completion(&emac->tdown_complete);
-	for (i = 0; i < emac->tx_ch_num; i++)
-		k3_udma_glue_tdown_tx_chn(emac->tx_chns[i].tx_chn, false);
-
-	ret = wait_for_completion_timeout(&emac->tdown_complete,
-					  msecs_to_jiffies(1000));
-	if (!ret)
-		netdev_err(ndev, "tx teardown timeout\n");
-
-	prueth_reset_tx_chan(emac, emac->tx_ch_num, true);
-	for (i = 0; i < emac->tx_ch_num; i++) {
-		napi_disable(&emac->tx_chns[i].napi_tx);
-		hrtimer_cancel(&emac->tx_chns[i].tx_hrtimer);
-	}
-
-	max_rx_flows = PRUETH_MAX_RX_FLOWS;
-	k3_udma_glue_tdown_rx_chn(emac->rx_chns.rx_chn, true);
-
-	prueth_reset_rx_chan(&emac->rx_chns, max_rx_flows, true);
-	prueth_destroy_xdp_rxqs(emac);
-	napi_disable(&emac->napi_rx);
-	hrtimer_cancel(&emac->rx_hrtimer);
+	prueth_destroy_txq(emac);
+	prueth_destroy_rxq(emac);
 
 	cancel_work_sync(&emac->rx_mode_work);
 
@@ -943,10 +1034,10 @@ static int emac_ndo_stop(struct net_device *ndev)
 
 	free_irq(emac->tx_ts_irq, emac);
 
-	free_irq(emac->rx_chns.irq[rx_flow], emac);
+	free_irq(emac->rx_chns.irq[PRUETH_RX_FLOW_DATA], emac);
 	prueth_ndev_del_tx_napi(emac, emac->tx_ch_num);
 
-	prueth_cleanup_rx_chns(emac, &emac->rx_chns, max_rx_flows);
+	prueth_cleanup_rx_chns(emac, &emac->rx_chns, PRUETH_MAX_RX_FLOWS);
 	prueth_cleanup_tx_chns(emac);
 
 	prueth->emacs_initialized--;
@@ -1108,7 +1199,8 @@ static int emac_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frame
 	__netif_tx_lock(netif_txq, cpu);
 	for (i = 0; i < n; i++) {
 		xdpf = frames[i];
-		err = emac_xmit_xdp_frame(emac, xdpf, NULL, q_idx);
+		err = emac_xmit_xdp_frame(emac, xdpf, q_idx,
+					  PRUETH_TX_BUFF_TYPE_XDP_NDO);
 		if (err != ICSSG_XDP_TX) {
 			ndev->stats.tx_dropped++;
 			break;
@@ -1141,6 +1233,109 @@ static int emac_xdp_setup(struct prueth_emac *emac, struct netdev_bpf *bpf)
 	return 0;
 }
 
+static int prueth_xsk_pool_enable(struct prueth_emac *emac,
+				  struct xsk_buff_pool *pool, u16 queue_id)
+{
+	struct prueth_rx_chn *rx_chn = &emac->rx_chns;
+	u32 frame_size;
+	int ret;
+
+	if (queue_id >= PRUETH_MAX_RX_FLOWS ||
+	    queue_id >= emac->tx_ch_num) {
+		netdev_err(emac->ndev, "Invalid XSK queue ID %d\n", queue_id);
+		return -EINVAL;
+	}
+
+	frame_size = xsk_pool_get_rx_frame_size(pool);
+	if (frame_size < PRUETH_MAX_PKT_SIZE)
+		return -EOPNOTSUPP;
+
+	ret = xsk_pool_dma_map(pool, rx_chn->dma_dev, PRUETH_RX_DMA_ATTR);
+	if (ret) {
+		netdev_err(emac->ndev, "Failed to map XSK pool: %d\n", ret);
+		return ret;
+	}
+
+	if (netif_running(emac->ndev)) {
+		/* stop packets from wire for graceful teardown */
+		ret = icssg_set_port_state(emac, ICSSG_EMAC_PORT_DISABLE);
+		if (ret)
+			return ret;
+		prueth_destroy_rxq(emac);
+	}
+
+	emac->xsk_qid = queue_id;
+	prueth_set_xsk_pool(emac, queue_id);
+
+	if (netif_running(emac->ndev)) {
+		ret = prueth_create_rxq(emac);
+		if (ret) {
+			netdev_err(emac->ndev, "Failed to create RX queue: %d\n", ret);
+			return ret;
+		}
+		ret = icssg_set_port_state(emac, ICSSG_EMAC_PORT_FORWARD);
+		if (ret) {
+			prueth_destroy_rxq(emac);
+			return ret;
+		}
+		ret = prueth_xsk_wakeup(emac->ndev, queue_id, XDP_WAKEUP_RX);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int prueth_xsk_pool_disable(struct prueth_emac *emac, u16 queue_id)
+{
+	struct xsk_buff_pool *pool;
+	int ret;
+
+	if (queue_id >= PRUETH_MAX_RX_FLOWS ||
+	    queue_id >= emac->tx_ch_num) {
+		netdev_err(emac->ndev, "Invalid XSK queue ID %d\n", queue_id);
+		return -EINVAL;
+	}
+
+	if (emac->xsk_qid != queue_id) {
+		netdev_err(emac->ndev, "XSK queue ID %d not registered\n", queue_id);
+		return -EINVAL;
+	}
+
+	pool = xsk_get_pool_from_qid(emac->ndev, queue_id);
+	if (!pool) {
+		netdev_err(emac->ndev, "No XSK pool registered for queue %d\n", queue_id);
+		return -EINVAL;
+	}
+
+	if (netif_running(emac->ndev)) {
+		/* stop packets from wire for graceful teardown */
+		ret = icssg_set_port_state(emac, ICSSG_EMAC_PORT_DISABLE);
+		if (ret)
+			return ret;
+		prueth_destroy_rxq(emac);
+	}
+
+	xsk_pool_dma_unmap(pool, PRUETH_RX_DMA_ATTR);
+	emac->xsk_qid = -EINVAL;
+	prueth_set_xsk_pool(emac, queue_id);
+
+	if (netif_running(emac->ndev)) {
+		ret = prueth_create_rxq(emac);
+		if (ret) {
+			netdev_err(emac->ndev, "Failed to create RX queue: %d\n", ret);
+			return ret;
+		}
+		ret = icssg_set_port_state(emac, ICSSG_EMAC_PORT_FORWARD);
+		if (ret) {
+			prueth_destroy_rxq(emac);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
 /**
  * emac_ndo_bpf - implements ndo_bpf for icssg_prueth
  * @ndev: network adapter device
@@ -1155,11 +1350,58 @@ static int emac_ndo_bpf(struct net_device *ndev, struct netdev_bpf *bpf)
 	switch (bpf->command) {
 	case XDP_SETUP_PROG:
 		return emac_xdp_setup(emac, bpf);
+	case XDP_SETUP_XSK_POOL:
+		return bpf->xsk.pool ?
+			prueth_xsk_pool_enable(emac, bpf->xsk.pool, bpf->xsk.queue_id) :
+			prueth_xsk_pool_disable(emac, bpf->xsk.queue_id);
 	default:
 		return -EINVAL;
 	}
 }
 
+int prueth_xsk_wakeup(struct net_device *ndev, u32 qid, u32 flags)
+{
+	struct prueth_emac *emac = netdev_priv(ndev);
+	struct prueth_tx_chn *tx_chn = &emac->tx_chns[qid];
+	struct prueth_rx_chn *rx_chn = &emac->rx_chns;
+
+	if (emac->xsk_qid != qid) {
+		netdev_err(ndev, "XSK queue %d not registered\n", qid);
+		return -EINVAL;
+	}
+
+	if (qid >= PRUETH_MAX_RX_FLOWS || qid >= emac->tx_ch_num) {
+		netdev_err(ndev, "Invalid XSK queue ID %d\n", qid);
+		return -EINVAL;
+	}
+
+	if (!tx_chn->xsk_pool) {
+		netdev_err(ndev, "XSK pool not registered for queue %d\n", qid);
+		return -EINVAL;
+	}
+
+	if (!rx_chn->xsk_pool) {
+		netdev_err(ndev, "XSK pool not registered for RX queue %d\n", qid);
+		return -EINVAL;
+	}
+
+	if (flags & XDP_WAKEUP_TX) {
+		if (!napi_if_scheduled_mark_missed(&tx_chn->napi_tx)) {
+			if (likely(napi_schedule_prep(&tx_chn->napi_tx)))
+				__napi_schedule(&tx_chn->napi_tx);
+		}
+	}
+
+	if (flags & XDP_WAKEUP_RX) {
+		if (!napi_if_scheduled_mark_missed(&emac->napi_rx)) {
+			if (likely(napi_schedule_prep(&emac->napi_rx)))
+				__napi_schedule(&emac->napi_rx);
+		}
+	}
+
+	return 0;
+}
+
 static const struct net_device_ops emac_netdev_ops = {
 	.ndo_open = emac_ndo_open,
 	.ndo_stop = emac_ndo_stop,
@@ -1168,7 +1410,7 @@ static const struct net_device_ops emac_netdev_ops = {
 	.ndo_validate_addr = eth_validate_addr,
 	.ndo_tx_timeout = icssg_ndo_tx_timeout,
 	.ndo_set_rx_mode = emac_ndo_set_rx_mode,
-	.ndo_eth_ioctl = icssg_ndo_ioctl,
+	.ndo_eth_ioctl = phy_do_ioctl,
 	.ndo_get_stats64 = icssg_ndo_get_stats64,
 	.ndo_get_phys_port_name = icssg_ndo_get_phys_port_name,
 	.ndo_fix_features = emac_ndo_fix_features,
@@ -1176,6 +1418,9 @@ static const struct net_device_ops emac_netdev_ops = {
 	.ndo_vlan_rx_kill_vid = emac_ndo_vlan_rx_del_vid,
 	.ndo_bpf = emac_ndo_bpf,
 	.ndo_xdp_xmit = emac_xdp_xmit,
+	.ndo_hwtstamp_get = icssg_ndo_get_ts_config,
+	.ndo_hwtstamp_set = icssg_ndo_set_ts_config,
+	.ndo_xsk_wakeup = prueth_xsk_wakeup,
 };
 
 static int prueth_netdev_init(struct prueth *prueth,
@@ -1248,8 +1493,7 @@ static int prueth_netdev_init(struct prueth *prueth,
 	} else if (of_phy_is_fixed_link(eth_node)) {
 		ret = of_phy_register_fixed_link(eth_node);
 		if (ret) {
-			ret = dev_err_probe(prueth->dev, ret,
-					    "failed to register fixed-link phy\n");
+			dev_err_probe(prueth->dev, ret, "failed to register fixed-link phy\n");
 			goto free;
 		}
 
@@ -1310,7 +1554,8 @@ static int prueth_netdev_init(struct prueth *prueth,
 	xdp_set_features_flag(ndev,
 			      NETDEV_XDP_ACT_BASIC |
 			      NETDEV_XDP_ACT_REDIRECT |
-			      NETDEV_XDP_ACT_NDO_XMIT);
+			      NETDEV_XDP_ACT_NDO_XMIT |
+			      NETDEV_XDP_ACT_XSK_ZEROCOPY);
 
 	netif_napi_add(ndev, &emac->napi_rx, icssg_napi_rx_poll);
 	hrtimer_setup(&emac->rx_hrtimer, &emac_rx_timer_callback, CLOCK_MONOTONIC,