1 files changed, 164 insertions, 61 deletions

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 92c55e1a5507..98d5cd313fdd 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -66,6 +66,8 @@
 #include <linux/mfd/syscon.h>
 #include <linux/regmap.h>
 #include <soc/imx/cpuidle.h>
+#include <linux/filter.h>
+#include <linux/bpf.h>
 
 #include <asm/cacheflush.h>
 
@@ -156,6 +158,13 @@ static const struct fec_devinfo fec_imx8qm_info = {
 		  FEC_QUIRK_DELAYED_CLKS_SUPPORT,
 };
 
+static const struct fec_devinfo fec_s32v234_info = {
+	.quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
+		  FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
+		  FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB |
+		  FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE,
+};
+
 static struct platform_device_id fec_devtype[] = {
 	{
 		/* keep it for coldfire */
@@ -189,6 +198,9 @@ static struct platform_device_id fec_devtype[] = {
 		.name = "imx8qm-fec",
 		.driver_data = (kernel_ulong_t)&fec_imx8qm_info,
 	}, {
+		.name = "s32v234-fec",
+		.driver_data = (kernel_ulong_t)&fec_s32v234_info,
+	}, {
 		/* sentinel */
 	}
 };
@@ -204,6 +216,7 @@ enum imx_fec_type {
 	IMX6UL_FEC,
 	IMX8MQ_FEC,
 	IMX8QM_FEC,
+	S32V234_FEC,
 };
 
 static const struct of_device_id fec_dt_ids[] = {
@@ -216,6 +229,7 @@ static const struct of_device_id fec_dt_ids[] = {
 	{ .compatible = "fsl,imx6ul-fec", .data = &fec_devtype[IMX6UL_FEC], },
 	{ .compatible = "fsl,imx8mq-fec", .data = &fec_devtype[IMX8MQ_FEC], },
 	{ .compatible = "fsl,imx8qm-fec", .data = &fec_devtype[IMX8QM_FEC], },
+	{ .compatible = "fsl,s32v234-fec", .data = &fec_devtype[S32V234_FEC], },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, fec_dt_ids);
@@ -410,6 +424,48 @@ fec_enet_clear_csum(struct sk_buff *skb, struct net_device *ndev)
 	return 0;
 }
 
+static int
+fec_enet_create_page_pool(struct fec_enet_private *fep,
+			  struct fec_enet_priv_rx_q *rxq, int size)
+{
+	struct page_pool_params pp_params = {
+		.order = 0,
+		.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV,
+		.pool_size = size,
+		.nid = dev_to_node(&fep->pdev->dev),
+		.dev = &fep->pdev->dev,
+		.dma_dir = DMA_FROM_DEVICE,
+		.offset = FEC_ENET_XDP_HEADROOM,
+		.max_len = FEC_ENET_RX_FRSIZE,
+	};
+	int err;
+
+	rxq->page_pool = page_pool_create(&pp_params);
+	if (IS_ERR(rxq->page_pool)) {
+		err = PTR_ERR(rxq->page_pool);
+		rxq->page_pool = NULL;
+		return err;
+	}
+
+	err = xdp_rxq_info_reg(&rxq->xdp_rxq, fep->netdev, rxq->id, 0);
+	if (err < 0)
+		goto err_free_pp;
+
+	err = xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL,
+					 rxq->page_pool);
+	if (err)
+		goto err_unregister_rxq;
+
+	return 0;
+
+err_unregister_rxq:
+	xdp_rxq_info_unreg(&rxq->xdp_rxq);
+err_free_pp:
+	page_pool_destroy(rxq->page_pool);
+	rxq->page_pool = NULL;
+	return err;
+}
+
 static struct bufdesc *
 fec_enet_txq_submit_frag_skb(struct fec_enet_priv_tx_q *txq,
 			     struct sk_buff *skb,
@@ -1168,6 +1224,34 @@ fec_restart(struct net_device *ndev)
 
 }
 
+static int fec_enet_ipc_handle_init(struct fec_enet_private *fep)
+{
+	if (!(of_machine_is_compatible("fsl,imx8qm") ||
+	      of_machine_is_compatible("fsl,imx8qxp") ||
+	      of_machine_is_compatible("fsl,imx8dxl")))
+		return 0;
+
+	return imx_scu_get_handle(&fep->ipc_handle);
+}
+
+static void fec_enet_ipg_stop_set(struct fec_enet_private *fep, bool enabled)
+{
+	struct device_node *np = fep->pdev->dev.of_node;
+	u32 rsrc_id, val;
+	int idx;
+
+	if (!np || !fep->ipc_handle)
+		return;
+
+	idx = of_alias_get_id(np, "ethernet");
+	if (idx < 0)
+		idx = 0;
+	rsrc_id = idx ? IMX_SC_R_ENET_1 : IMX_SC_R_ENET_0;
+
+	val = enabled ? 1 : 0;
+	imx_sc_misc_set_control(fep->ipc_handle, rsrc_id, IMX_SC_C_IPG_STOP, val);
+}
+
 static void fec_enet_stop_mode(struct fec_enet_private *fep, bool enabled)
 {
 	struct fec_platform_data *pdata = fep->pdev->dev.platform_data;
@@ -1183,6 +1267,8 @@ static void fec_enet_stop_mode(struct fec_enet_private *fep, bool enabled)
 					   BIT(stop_gpr->bit), 0);
 	} else if (pdata && pdata->sleep_mode_enable) {
 		pdata->sleep_mode_enable(enabled);
+	} else {
+		fec_enet_ipg_stop_set(fep, enabled);
 	}
 }
 
@@ -1408,7 +1494,7 @@ static void fec_enet_tx(struct net_device *ndev)
 		fec_enet_tx_queue(ndev, i);
 }
 
-static int
+static int __maybe_unused
 fec_enet_new_rxbdp(struct net_device *ndev, struct bufdesc *bdp, struct sk_buff *skb)
 {
 	struct  fec_enet_private *fep = netdev_priv(ndev);
@@ -1428,8 +1514,9 @@ fec_enet_new_rxbdp(struct net_device *ndev, struct bufdesc *bdp, struct sk_buff
 	return 0;
 }
 
-static bool fec_enet_copybreak(struct net_device *ndev, struct sk_buff **skb,
-			       struct bufdesc *bdp, u32 length, bool swap)
+static bool __maybe_unused
+fec_enet_copybreak(struct net_device *ndev, struct sk_buff **skb,
+		   struct bufdesc *bdp, u32 length, bool swap)
 {
 	struct  fec_enet_private *fep = netdev_priv(ndev);
 	struct sk_buff *new_skb;
@@ -1454,6 +1541,21 @@ static bool fec_enet_copybreak(struct net_device *ndev, struct sk_buff **skb,
 	return true;
 }
 
+static void fec_enet_update_cbd(struct fec_enet_priv_rx_q *rxq,
+				struct bufdesc *bdp, int index)
+{
+	struct page *new_page;
+	dma_addr_t phys_addr;
+
+	new_page = page_pool_dev_alloc_pages(rxq->page_pool);
+	WARN_ON(!new_page);
+	rxq->rx_skb_info[index].page = new_page;
+
+	rxq->rx_skb_info[index].offset = FEC_ENET_XDP_HEADROOM;
+	phys_addr = page_pool_get_dma_addr(new_page) + FEC_ENET_XDP_HEADROOM;
+	bdp->cbd_bufaddr = cpu_to_fec32(phys_addr);
+}
+
 /* During a receive, the bd_rx.cur points to the current incoming buffer.
  * When we update through the ring, if the next incoming buffer has
  * not been given to the system, we just set the empty indicator,
@@ -1466,7 +1568,6 @@ fec_enet_rx_queue(struct net_device *ndev, int budget, u16 queue_id)
 	struct fec_enet_priv_rx_q *rxq;
 	struct bufdesc *bdp;
 	unsigned short status;
-	struct  sk_buff *skb_new = NULL;
 	struct  sk_buff *skb;
 	ushort	pkt_len;
 	__u8 *data;
@@ -1475,8 +1576,8 @@ fec_enet_rx_queue(struct net_device *ndev, int budget, u16 queue_id)
 	bool	vlan_packet_rcvd = false;
 	u16	vlan_tag;
 	int	index = 0;
-	bool	is_copybreak;
 	bool	need_swap = fep->quirks & FEC_QUIRK_SWAP_FRAME;
+	struct page *page;
 
 #ifdef CONFIG_M532x
 	flush_cache_all();
@@ -1528,31 +1629,25 @@ fec_enet_rx_queue(struct net_device *ndev, int budget, u16 queue_id)
 		ndev->stats.rx_bytes += pkt_len;
 
 		index = fec_enet_get_bd_index(bdp, &rxq->bd);
-		skb = rxq->rx_skbuff[index];
+		page = rxq->rx_skb_info[index].page;
+		dma_sync_single_for_cpu(&fep->pdev->dev,
+					fec32_to_cpu(bdp->cbd_bufaddr),
+					pkt_len,
+					DMA_FROM_DEVICE);
+		prefetch(page_address(page));
+		fec_enet_update_cbd(rxq, bdp, index);
 
 		/* The packet length includes FCS, but we don't want to
 		 * include that when passing upstream as it messes up
 		 * bridging applications.
 		 */
-		is_copybreak = fec_enet_copybreak(ndev, &skb, bdp, pkt_len - 4,
-						  need_swap);
-		if (!is_copybreak) {
-			skb_new = netdev_alloc_skb(ndev, FEC_ENET_RX_FRSIZE);
-			if (unlikely(!skb_new)) {
-				ndev->stats.rx_dropped++;
-				goto rx_processing_done;
-			}
-			dma_unmap_single(&fep->pdev->dev,
-					 fec32_to_cpu(bdp->cbd_bufaddr),
-					 FEC_ENET_RX_FRSIZE - fep->rx_align,
-					 DMA_FROM_DEVICE);
-		}
-
-		prefetch(skb->data - NET_IP_ALIGN);
+		skb = build_skb(page_address(page), PAGE_SIZE);
+		skb_reserve(skb, FEC_ENET_XDP_HEADROOM);
 		skb_put(skb, pkt_len - 4);
+		skb_mark_for_recycle(skb);
 		data = skb->data;
 
-		if (!is_copybreak && need_swap)
+		if (need_swap)
 			swap_buffer(data, pkt_len);
 
 #if !defined(CONFIG_M5272)
@@ -1607,16 +1702,6 @@ fec_enet_rx_queue(struct net_device *ndev, int budget, u16 queue_id)
 		skb_record_rx_queue(skb, queue_id);
 		napi_gro_receive(&fep->napi, skb);
 
-		if (is_copybreak) {
-			dma_sync_single_for_device(&fep->pdev->dev,
-						   fec32_to_cpu(bdp->cbd_bufaddr),
-						   FEC_ENET_RX_FRSIZE - fep->rx_align,
-						   DMA_FROM_DEVICE);
-		} else {
-			rxq->rx_skbuff[index] = skb_new;
-			fec_enet_new_rxbdp(ndev, bdp, skb_new);
-		}
-
 rx_processing_done:
 		/* Clear the status flags for this buffer */
 		status &= ~BD_ENET_RX_STATS;
@@ -2105,13 +2190,13 @@ static int fec_enet_mii_probe(struct net_device *ndev)
 				continue;
 			if (dev_id--)
 				continue;
-			strlcpy(mdio_bus_id, fep->mii_bus->id, MII_BUS_ID_SIZE);
+			strscpy(mdio_bus_id, fep->mii_bus->id, MII_BUS_ID_SIZE);
 			break;
 		}
 
 		if (phy_id >= PHY_MAX_ADDR) {
 			netdev_info(ndev, "no PHY, assuming direct connection to switch\n");
-			strlcpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE);
+			strscpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE);
 			phy_id = 0;
 		}
 
@@ -2295,9 +2380,9 @@ static void fec_enet_get_drvinfo(struct net_device *ndev,
 {
 	struct fec_enet_private *fep = netdev_priv(ndev);
 
-	strlcpy(info->driver, fep->pdev->dev.driver->name,
+	strscpy(info->driver, fep->pdev->dev.driver->name,
 		sizeof(info->driver));
-	strlcpy(info->bus_info, dev_name(&ndev->dev), sizeof(info->bus_info));
+	strscpy(info->bus_info, dev_name(&ndev->dev), sizeof(info->bus_info));
 }
 
 static int fec_enet_get_regs_len(struct net_device *ndev)
@@ -2960,26 +3045,19 @@ static void fec_enet_free_buffers(struct net_device *ndev)
 	struct fec_enet_private *fep = netdev_priv(ndev);
 	unsigned int i;
 	struct sk_buff *skb;
-	struct bufdesc	*bdp;
 	struct fec_enet_priv_tx_q *txq;
 	struct fec_enet_priv_rx_q *rxq;
 	unsigned int q;
 
 	for (q = 0; q < fep->num_rx_queues; q++) {
 		rxq = fep->rx_queue[q];
-		bdp = rxq->bd.base;
-		for (i = 0; i < rxq->bd.ring_size; i++) {
-			skb = rxq->rx_skbuff[i];
-			rxq->rx_skbuff[i] = NULL;
-			if (skb) {
-				dma_unmap_single(&fep->pdev->dev,
-						 fec32_to_cpu(bdp->cbd_bufaddr),
-						 FEC_ENET_RX_FRSIZE - fep->rx_align,
-						 DMA_FROM_DEVICE);
-				dev_kfree_skb(skb);
-			}
-			bdp = fec_enet_get_nextdesc(bdp, &rxq->bd);
-		}
+		for (i = 0; i < rxq->bd.ring_size; i++)
+			page_pool_release_page(rxq->page_pool, rxq->rx_skb_info[i].page);
+
+		if (xdp_rxq_info_is_reg(&rxq->xdp_rxq))
+			xdp_rxq_info_unreg(&rxq->xdp_rxq);
+		page_pool_destroy(rxq->page_pool);
+		rxq->page_pool = NULL;
 	}
 
 	for (q = 0; q < fep->num_tx_queues; q++) {
@@ -3069,24 +3147,31 @@ static int
 fec_enet_alloc_rxq_buffers(struct net_device *ndev, unsigned int queue)
 {
 	struct fec_enet_private *fep = netdev_priv(ndev);
-	unsigned int i;
-	struct sk_buff *skb;
-	struct bufdesc	*bdp;
 	struct fec_enet_priv_rx_q *rxq;
+	dma_addr_t phys_addr;
+	struct bufdesc	*bdp;
+	struct page *page;
+	int i, err;
 
 	rxq = fep->rx_queue[queue];
 	bdp = rxq->bd.base;
+
+	err = fec_enet_create_page_pool(fep, rxq, rxq->bd.ring_size);
+	if (err < 0) {
+		netdev_err(ndev, "%s failed queue %d (%d)\n", __func__, queue, err);
+		return err;
+	}
+
 	for (i = 0; i < rxq->bd.ring_size; i++) {
-		skb = __netdev_alloc_skb(ndev, FEC_ENET_RX_FRSIZE, GFP_KERNEL);
-		if (!skb)
+		page = page_pool_dev_alloc_pages(rxq->page_pool);
+		if (!page)
 			goto err_alloc;
 
-		if (fec_enet_new_rxbdp(ndev, bdp, skb)) {
-			dev_kfree_skb(skb);
-			goto err_alloc;
-		}
+		phys_addr = page_pool_get_dma_addr(page) + FEC_ENET_XDP_HEADROOM;
+		bdp->cbd_bufaddr = cpu_to_fec32(phys_addr);
 
-		rxq->rx_skbuff[i] = skb;
+		rxq->rx_skb_info[i].page = page;
+		rxq->rx_skb_info[i].offset = FEC_ENET_XDP_HEADROOM;
 		bdp->cbd_sc = cpu_to_fec16(BD_ENET_RX_EMPTY);
 
 		if (fep->bufdesc_ex) {
@@ -3566,7 +3651,7 @@ static int fec_enet_init(struct net_device *ndev)
 	ndev->ethtool_ops = &fec_enet_ethtool_ops;
 
 	writel(FEC_RX_DISABLED_IMASK, fep->hwp + FEC_IMASK);
-	netif_napi_add(ndev, &fep->napi, fec_enet_rx_napi, NAPI_POLL_WEIGHT);
+	netif_napi_add(ndev, &fep->napi, fec_enet_rx_napi);
 
 	if (fep->quirks & FEC_QUIRK_HAS_VLAN)
 		/* enable hw VLAN support */
@@ -3824,6 +3909,10 @@ fec_probe(struct platform_device *pdev)
 	    !of_property_read_bool(np, "fsl,err006687-workaround-present"))
 		fep->quirks |= FEC_QUIRK_ERR006687;
 
+	ret = fec_enet_ipc_handle_init(fep);
+	if (ret)
+		goto failed_ipc_init;
+
 	if (of_get_property(np, "fsl,magic-packet", NULL))
 		fep->wol_flag |= FEC_WOL_HAS_MAGIC_PACKET;
 
@@ -4021,6 +4110,7 @@ failed_rgmii_delay:
 		of_phy_deregister_fixed_link(np);
 	of_node_put(phy_node);
 failed_stop_mode:
+failed_ipc_init:
 failed_phy:
 	dev_id--;
 failed_ioremap:
@@ -4065,6 +4155,7 @@ static int __maybe_unused fec_suspend(struct device *dev)
 {
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct fec_enet_private *fep = netdev_priv(ndev);
+	int ret;
 
 	rtnl_lock();
 	if (netif_running(ndev)) {
@@ -4089,6 +4180,15 @@ static int __maybe_unused fec_suspend(struct device *dev)
 		}
 		/* It's safe to disable clocks since interrupts are masked */
 		fec_enet_clk_enable(ndev, false);
+
+		fep->rpm_active = !pm_runtime_status_suspended(dev);
+		if (fep->rpm_active) {
+			ret = pm_runtime_force_suspend(dev);
+			if (ret < 0) {
+				rtnl_unlock();
+				return ret;
+			}
+		}
 	}
 	rtnl_unlock();
 
@@ -4119,6 +4219,9 @@ static int __maybe_unused fec_resume(struct device *dev)
 
 	rtnl_lock();
 	if (netif_running(ndev)) {
+		if (fep->rpm_active)
+			pm_runtime_force_resume(dev);
+
 		ret = fec_enet_clk_enable(ndev, true);
 		if (ret) {
 			rtnl_unlock();