F: include/linux/platform_data/dma-dw.h
F: drivers/dma/dw/
+SYNOPSYS DESIGNWARE ENTERPRISE ETHERNET DRIVER
+M: Jie Deng <jiedeng@synopsys.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/synopsys/
+
SYNOPSYS DESIGNWARE I2C DRIVER
M: Jarkko Nikula <jarkko.nikula@linux.intel.com>
R: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
source "drivers/net/ethernet/wiznet/Kconfig"
source "drivers/net/ethernet/xilinx/Kconfig"
source "drivers/net/ethernet/xircom/Kconfig"
+source "drivers/net/ethernet/synopsys/Kconfig"
endif # ETHERNET
obj-$(CONFIG_NET_VENDOR_WIZNET) += wiznet/
obj-$(CONFIG_NET_VENDOR_XILINX) += xilinx/
obj-$(CONFIG_NET_VENDOR_XIRCOM) += xircom/
+obj-$(CONFIG_NET_VENDOR_SYNOPSYS) += synopsys/
--- /dev/null
+#
+# Synopsys network device configuration
+#
+
+config NET_VENDOR_SYNOPSYS
+ bool "Synopsys devices"
+ default y
+ ---help---
+ If you have a network (Ethernet) device belonging to this class, say Y.
+
+ Note that the answer to this question doesn't directly affect the
+ kernel: saying N will just cause the configurator to skip all
+ the questions about Synopsys devices. If you say Y, you will be asked
+ for your specific device in the following questions.
+
+if NET_VENDOR_SYNOPSYS
+
+config DWC_XLGMAC
+ tristate "Synopsys DWC Enterprise Ethernet (XLGMAC) driver support"
+ depends on HAS_IOMEM && HAS_DMA
+ select BITREVERSE
+ select CRC32
+ ---help---
+ This driver supports the Synopsys DesignWare Cores Enterprise
+ Ethernet (dwc-xlgmac).
+
+if DWC_XLGMAC
+
+config DWC_XLGMAC_PCI
+ tristate "XLGMAC PCI bus support"
+ depends on DWC_XLGMAC && PCI
+ ---help---
+ This selects the pci bus support for the dwc-xlgmac driver.
+ This driver was tested on Synopsys XLGMAC IP Prototyping Kit.
+
+ If you have a controller with this interface, say Y or M here.
+ If unsure, say N.
+
+endif # DWC_XLGMAC
+
+endif # NET_VENDOR_SYNOPSYS
--- /dev/null
+#
+# Makefile for the Synopsys network device drivers.
+#
+
+obj-$(CONFIG_DWC_XLGMAC) += dwc-xlgmac.o
+dwc-xlgmac-objs := dwc-xlgmac-net.o dwc-xlgmac-desc.o \
+ dwc-xlgmac-hw.o dwc-xlgmac-common.o
+
+dwc-xlgmac-$(CONFIG_DWC_XLGMAC_PCI) += dwc-xlgmac-pci.o
--- /dev/null
+/* Synopsys DesignWare Core Enterprise Ethernet (XLGMAC) Driver
+ *
+ * Copyright (c) 2017 Synopsys, Inc. (www.synopsys.com)
+ *
+ * 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; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This Synopsys DWC XLGMAC software driver and associated documentation
+ * (hereinafter the "Software") is an unsupported proprietary work of
+ * Synopsys, Inc. unless otherwise expressly agreed to in writing between
+ * Synopsys and you. The Software IS NOT an item of Licensed Software or a
+ * Licensed Product under any End User Software License Agreement or
+ * Agreement for Licensed Products with Synopsys or any supplement thereto.
+ * Synopsys is a registered trademark of Synopsys, Inc. Other names included
+ * in the SOFTWARE may be the trademarks of their respective owners.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include "dwc-xlgmac.h"
+#include "dwc-xlgmac-reg.h"
+
+static int debug = -1;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "DWC ethernet debug level (0=none,...,16=all)");
+static const u32 default_msg_level = (NETIF_MSG_LINK | NETIF_MSG_IFDOWN |
+ NETIF_MSG_IFUP);
+
+static unsigned char dev_addr[6] = {0, 0x55, 0x7b, 0xb5, 0x7d, 0xf7};
+
+static void xlgmac_read_mac_addr(struct xlgmac_pdata *pdata)
+{
+ struct net_device *netdev = pdata->netdev;
+
+ /* Currently it uses a static mac address for test */
+ memcpy(pdata->mac_addr, dev_addr, netdev->addr_len);
+}
+
+static void xlgmac_default_config(struct xlgmac_pdata *pdata)
+{
+ pdata->tx_osp_mode = DMA_OSP_ENABLE;
+ pdata->tx_sf_mode = MTL_TSF_ENABLE;
+ pdata->rx_sf_mode = MTL_RSF_DISABLE;
+ pdata->pblx8 = DMA_PBL_X8_ENABLE;
+ pdata->tx_pbl = DMA_PBL_32;
+ pdata->rx_pbl = DMA_PBL_32;
+ pdata->tx_threshold = MTL_TX_THRESHOLD_128;
+ pdata->rx_threshold = MTL_RX_THRESHOLD_128;
+ pdata->tx_pause = 1;
+ pdata->rx_pause = 1;
+ pdata->phy_speed = SPEED_25000;
+ pdata->sysclk_rate = XLGMAC_SYSCLOCK;
+
+ strlcpy(pdata->drv_name, XLGMAC_DRV_NAME, sizeof(pdata->drv_name));
+ strlcpy(pdata->drv_ver, XLGMAC_DRV_VERSION, sizeof(pdata->drv_ver));
+}
+
+static void xlgmac_init_all_ops(struct xlgmac_pdata *pdata)
+{
+ xlgmac_init_desc_ops(&pdata->desc_ops);
+ xlgmac_init_hw_ops(&pdata->hw_ops);
+}
+
+static int xlgmac_init(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
+ struct net_device *netdev = pdata->netdev;
+ unsigned int i;
+ int ret;
+
+ /* Set default configuration data */
+ xlgmac_default_config(pdata);
+
+ /* Set irq, base_addr, MAC address, */
+ netdev->irq = pdata->dev_irq;
+ netdev->base_addr = (unsigned long)pdata->mac_regs;
+ xlgmac_read_mac_addr(pdata);
+ memcpy(netdev->dev_addr, pdata->mac_addr, netdev->addr_len);
+
+ /* Set all the function pointers */
+ xlgmac_init_all_ops(pdata);
+
+ /* Issue software reset to device */
+ hw_ops->exit(pdata);
+
+ /* Populate the hardware features */
+ xlgmac_get_all_hw_features(pdata);
+ xlgmac_print_all_hw_features(pdata);
+
+ /* TODO: Set the PHY mode to XLGMII */
+
+ /* Set the DMA mask */
+ ret = dma_set_mask_and_coherent(pdata->dev,
+ DMA_BIT_MASK(pdata->hw_feat.dma_width));
+ if (ret) {
+ dev_err(pdata->dev, "dma_set_mask_and_coherent failed\n");
+ return ret;
+ }
+
+ /* Channel and ring params initializtion
+ * pdata->channel_count;
+ * pdata->tx_ring_count;
+ * pdata->rx_ring_count;
+ * pdata->tx_desc_count;
+ * pdata->rx_desc_count;
+ */
+ BUILD_BUG_ON_NOT_POWER_OF_2(XLGMAC_TX_DESC_CNT);
+ pdata->tx_desc_count = XLGMAC_TX_DESC_CNT;
+ if (pdata->tx_desc_count & (pdata->tx_desc_count - 1)) {
+ dev_err(pdata->dev, "tx descriptor count (%d) is not valid\n",
+ pdata->tx_desc_count);
+ ret = -EINVAL;
+ return ret;
+ }
+ BUILD_BUG_ON_NOT_POWER_OF_2(XLGMAC_RX_DESC_CNT);
+ pdata->rx_desc_count = XLGMAC_RX_DESC_CNT;
+ if (pdata->rx_desc_count & (pdata->rx_desc_count - 1)) {
+ dev_err(pdata->dev, "rx descriptor count (%d) is not valid\n",
+ pdata->rx_desc_count);
+ ret = -EINVAL;
+ return ret;
+ }
+
+ pdata->tx_ring_count = min_t(unsigned int, num_online_cpus(),
+ pdata->hw_feat.tx_ch_cnt);
+ pdata->tx_ring_count = min_t(unsigned int, pdata->tx_ring_count,
+ pdata->hw_feat.tx_q_cnt);
+ pdata->tx_q_count = pdata->tx_ring_count;
+ ret = netif_set_real_num_tx_queues(netdev, pdata->tx_q_count);
+ if (ret) {
+ dev_err(pdata->dev, "error setting real tx queue count\n");
+ return ret;
+ }
+
+ pdata->rx_ring_count = min_t(unsigned int,
+ netif_get_num_default_rss_queues(),
+ pdata->hw_feat.rx_ch_cnt);
+ pdata->rx_ring_count = min_t(unsigned int, pdata->rx_ring_count,
+ pdata->hw_feat.rx_q_cnt);
+ pdata->rx_q_count = pdata->rx_ring_count;
+ ret = netif_set_real_num_rx_queues(netdev, pdata->rx_q_count);
+ if (ret) {
+ dev_err(pdata->dev, "error setting real rx queue count\n");
+ return ret;
+ }
+
+ pdata->channel_count =
+ max_t(unsigned int, pdata->tx_ring_count, pdata->rx_ring_count);
+
+ /* Initialize RSS hash key and lookup table */
+ netdev_rss_key_fill(pdata->rss_key, sizeof(pdata->rss_key));
+
+ for (i = 0; i < XLGMAC_RSS_MAX_TABLE_SIZE; i++)
+ pdata->rss_table[i] = XLGMAC_SET_REG_BITS(
+ pdata->rss_table[i],
+ MAC_RSSDR_DMCH_POS,
+ MAC_RSSDR_DMCH_LEN,
+ i % pdata->rx_ring_count);
+
+ pdata->rss_options = XLGMAC_SET_REG_BITS(
+ pdata->rss_options,
+ MAC_RSSCR_IP2TE_POS,
+ MAC_RSSCR_IP2TE_LEN, 1);
+ pdata->rss_options = XLGMAC_SET_REG_BITS(
+ pdata->rss_options,
+ MAC_RSSCR_TCP4TE_POS,
+ MAC_RSSCR_TCP4TE_LEN, 1);
+ pdata->rss_options = XLGMAC_SET_REG_BITS(
+ pdata->rss_options,
+ MAC_RSSCR_UDP4TE_POS,
+ MAC_RSSCR_UDP4TE_LEN, 1);
+
+ /* Set device operations */
+ netdev->netdev_ops = xlgmac_get_netdev_ops();
+
+ /* Set device features */
+ if (pdata->hw_feat.tso) {
+ netdev->hw_features = NETIF_F_TSO;
+ netdev->hw_features |= NETIF_F_TSO6;
+ netdev->hw_features |= NETIF_F_SG;
+ netdev->hw_features |= NETIF_F_IP_CSUM;
+ netdev->hw_features |= NETIF_F_IPV6_CSUM;
+ } else if (pdata->hw_feat.tx_coe) {
+ netdev->hw_features = NETIF_F_IP_CSUM;
+ netdev->hw_features |= NETIF_F_IPV6_CSUM;
+ }
+
+ if (pdata->hw_feat.rx_coe) {
+ netdev->hw_features |= NETIF_F_RXCSUM;
+ netdev->hw_features |= NETIF_F_GRO;
+ }
+
+ if (pdata->hw_feat.rss)
+ netdev->hw_features |= NETIF_F_RXHASH;
+
+ netdev->vlan_features |= netdev->hw_features;
+
+ netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
+ if (pdata->hw_feat.sa_vlan_ins)
+ netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX;
+ if (pdata->hw_feat.vlhash)
+ netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+
+ netdev->features |= netdev->hw_features;
+ pdata->netdev_features = netdev->features;
+
+ netdev->priv_flags |= IFF_UNICAST_FLT;
+
+ /* Use default watchdog timeout */
+ netdev->watchdog_timeo = 0;
+
+ /* Tx coalesce parameters initialization */
+ pdata->tx_usecs = XLGMAC_INIT_DMA_TX_USECS;
+ pdata->tx_frames = XLGMAC_INIT_DMA_TX_FRAMES;
+
+ /* Rx coalesce parameters initialization */
+ pdata->rx_riwt = hw_ops->usec_to_riwt(pdata, XLGMAC_INIT_DMA_RX_USECS);
+ pdata->rx_usecs = XLGMAC_INIT_DMA_RX_USECS;
+ pdata->rx_frames = XLGMAC_INIT_DMA_RX_FRAMES;
+
+ return 0;
+}
+
+int xlgmac_drv_probe(struct device *dev, struct xlgmac_resources *res)
+{
+ struct xlgmac_pdata *pdata;
+ struct net_device *netdev;
+ int ret;
+
+ netdev = alloc_etherdev_mq(sizeof(struct xlgmac_pdata),
+ XLGMAC_MAX_DMA_CHANNELS);
+
+ if (!netdev) {
+ dev_err(dev, "alloc_etherdev failed\n");
+ return -ENOMEM;
+ }
+
+ SET_NETDEV_DEV(netdev, dev);
+ dev_set_drvdata(dev, netdev);
+ pdata = netdev_priv(netdev);
+ pdata->dev = dev;
+ pdata->netdev = netdev;
+
+ pdata->dev_irq = res->irq;
+ pdata->mac_regs = res->addr;
+
+ mutex_init(&pdata->rss_mutex);
+ pdata->msg_enable = netif_msg_init(debug, default_msg_level);
+
+ ret = xlgmac_init(pdata);
+ if (ret) {
+ dev_err(dev, "xlgmac init failed\n");
+ goto err_free_netdev;
+ }
+
+ ret = register_netdev(netdev);
+ if (ret) {
+ dev_err(dev, "net device registration failed\n");
+ goto err_free_netdev;
+ }
+
+ return 0;
+
+err_free_netdev:
+ free_netdev(netdev);
+
+ return ret;
+}
+
+int xlgmac_drv_remove(struct device *dev)
+{
+ struct net_device *netdev = dev_get_drvdata(dev);
+
+ unregister_netdev(netdev);
+ free_netdev(netdev);
+
+ return 0;
+}
+
+void xlgmac_dump_tx_desc(struct xlgmac_pdata *pdata,
+ struct xlgmac_ring *ring,
+ unsigned int idx,
+ unsigned int count,
+ unsigned int flag)
+{
+ struct xlgmac_desc_data *desc_data;
+ struct xlgmac_dma_desc *dma_desc;
+
+ while (count--) {
+ desc_data = XLGMAC_GET_DESC_DATA(ring, idx);
+ dma_desc = desc_data->dma_desc;
+
+ netdev_dbg(pdata->netdev, "TX: dma_desc=%p, dma_desc_addr=%pad\n",
+ desc_data->dma_desc, &desc_data->dma_desc_addr);
+ netdev_dbg(pdata->netdev,
+ "TX_NORMAL_DESC[%d %s] = %08x:%08x:%08x:%08x\n", idx,
+ (flag == 1) ? "QUEUED FOR TX" : "TX BY DEVICE",
+ le32_to_cpu(dma_desc->desc0),
+ le32_to_cpu(dma_desc->desc1),
+ le32_to_cpu(dma_desc->desc2),
+ le32_to_cpu(dma_desc->desc3));
+
+ idx++;
+ }
+}
+
+void xlgmac_dump_rx_desc(struct xlgmac_pdata *pdata,
+ struct xlgmac_ring *ring,
+ unsigned int idx)
+{
+ struct xlgmac_desc_data *desc_data;
+ struct xlgmac_dma_desc *dma_desc;
+
+ desc_data = XLGMAC_GET_DESC_DATA(ring, idx);
+ dma_desc = desc_data->dma_desc;
+
+ netdev_dbg(pdata->netdev, "RX: dma_desc=%p, dma_desc_addr=%pad\n",
+ desc_data->dma_desc, &desc_data->dma_desc_addr);
+ netdev_dbg(pdata->netdev,
+ "RX_NORMAL_DESC[%d RX BY DEVICE] = %08x:%08x:%08x:%08x\n",
+ idx,
+ le32_to_cpu(dma_desc->desc0),
+ le32_to_cpu(dma_desc->desc1),
+ le32_to_cpu(dma_desc->desc2),
+ le32_to_cpu(dma_desc->desc3));
+}
+
+void xlgmac_print_pkt(struct net_device *netdev,
+ struct sk_buff *skb, bool tx_rx)
+{
+ struct ethhdr *eth = (struct ethhdr *)skb->data;
+ unsigned char *buf = skb->data;
+ unsigned char buffer[128];
+ unsigned int i, j;
+
+ netdev_dbg(netdev, "\n************** SKB dump ****************\n");
+
+ netdev_dbg(netdev, "%s packet of %d bytes\n",
+ (tx_rx ? "TX" : "RX"), skb->len);
+
+ netdev_dbg(netdev, "Dst MAC addr: %pM\n", eth->h_dest);
+ netdev_dbg(netdev, "Src MAC addr: %pM\n", eth->h_source);
+ netdev_dbg(netdev, "Protocol: %#06hx\n", ntohs(eth->h_proto));
+
+ for (i = 0, j = 0; i < skb->len;) {
+ j += snprintf(buffer + j, sizeof(buffer) - j, "%02hhx",
+ buf[i++]);
+
+ if ((i % 32) == 0) {
+ netdev_dbg(netdev, " %#06x: %s\n", i - 32, buffer);
+ j = 0;
+ } else if ((i % 16) == 0) {
+ buffer[j++] = ' ';
+ buffer[j++] = ' ';
+ } else if ((i % 4) == 0) {
+ buffer[j++] = ' ';
+ }
+ }
+ if (i % 32)
+ netdev_dbg(netdev, " %#06x: %s\n", i - (i % 32), buffer);
+
+ netdev_dbg(netdev, "\n************** SKB dump ****************\n");
+}
+
+void xlgmac_get_all_hw_features(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_hw_features *hw_feat = &pdata->hw_feat;
+ unsigned int mac_hfr0, mac_hfr1, mac_hfr2;
+
+ mac_hfr0 = readl(pdata->mac_regs + MAC_HWF0R);
+ mac_hfr1 = readl(pdata->mac_regs + MAC_HWF1R);
+ mac_hfr2 = readl(pdata->mac_regs + MAC_HWF2R);
+
+ memset(hw_feat, 0, sizeof(*hw_feat));
+
+ hw_feat->version = readl(pdata->mac_regs + MAC_VR);
+
+ /* Hardware feature register 0 */
+ hw_feat->phyifsel = XLGMAC_GET_REG_BITS(mac_hfr0,
+ MAC_HWF0R_PHYIFSEL_POS,
+ MAC_HWF0R_PHYIFSEL_LEN);
+ hw_feat->vlhash = XLGMAC_GET_REG_BITS(mac_hfr0,
+ MAC_HWF0R_VLHASH_POS,
+ MAC_HWF0R_VLHASH_LEN);
+ hw_feat->sma = XLGMAC_GET_REG_BITS(mac_hfr0,
+ MAC_HWF0R_SMASEL_POS,
+ MAC_HWF0R_SMASEL_LEN);
+ hw_feat->rwk = XLGMAC_GET_REG_BITS(mac_hfr0,
+ MAC_HWF0R_RWKSEL_POS,
+ MAC_HWF0R_RWKSEL_LEN);
+ hw_feat->mgk = XLGMAC_GET_REG_BITS(mac_hfr0,
+ MAC_HWF0R_MGKSEL_POS,
+ MAC_HWF0R_MGKSEL_LEN);
+ hw_feat->mmc = XLGMAC_GET_REG_BITS(mac_hfr0,
+ MAC_HWF0R_MMCSEL_POS,
+ MAC_HWF0R_MMCSEL_LEN);
+ hw_feat->aoe = XLGMAC_GET_REG_BITS(mac_hfr0,
+ MAC_HWF0R_ARPOFFSEL_POS,
+ MAC_HWF0R_ARPOFFSEL_LEN);
+ hw_feat->ts = XLGMAC_GET_REG_BITS(mac_hfr0,
+ MAC_HWF0R_TSSEL_POS,
+ MAC_HWF0R_TSSEL_LEN);
+ hw_feat->eee = XLGMAC_GET_REG_BITS(mac_hfr0,
+ MAC_HWF0R_EEESEL_POS,
+ MAC_HWF0R_EEESEL_LEN);
+ hw_feat->tx_coe = XLGMAC_GET_REG_BITS(mac_hfr0,
+ MAC_HWF0R_TXCOESEL_POS,
+ MAC_HWF0R_TXCOESEL_LEN);
+ hw_feat->rx_coe = XLGMAC_GET_REG_BITS(mac_hfr0,
+ MAC_HWF0R_RXCOESEL_POS,
+ MAC_HWF0R_RXCOESEL_LEN);
+ hw_feat->addn_mac = XLGMAC_GET_REG_BITS(mac_hfr0,
+ MAC_HWF0R_ADDMACADRSEL_POS,
+ MAC_HWF0R_ADDMACADRSEL_LEN);
+ hw_feat->ts_src = XLGMAC_GET_REG_BITS(mac_hfr0,
+ MAC_HWF0R_TSSTSSEL_POS,
+ MAC_HWF0R_TSSTSSEL_LEN);
+ hw_feat->sa_vlan_ins = XLGMAC_GET_REG_BITS(mac_hfr0,
+ MAC_HWF0R_SAVLANINS_POS,
+ MAC_HWF0R_SAVLANINS_LEN);
+
+ /* Hardware feature register 1 */
+ hw_feat->rx_fifo_size = XLGMAC_GET_REG_BITS(mac_hfr1,
+ MAC_HWF1R_RXFIFOSIZE_POS,
+ MAC_HWF1R_RXFIFOSIZE_LEN);
+ hw_feat->tx_fifo_size = XLGMAC_GET_REG_BITS(mac_hfr1,
+ MAC_HWF1R_TXFIFOSIZE_POS,
+ MAC_HWF1R_TXFIFOSIZE_LEN);
+ hw_feat->adv_ts_hi = XLGMAC_GET_REG_BITS(mac_hfr1,
+ MAC_HWF1R_ADVTHWORD_POS,
+ MAC_HWF1R_ADVTHWORD_LEN);
+ hw_feat->dma_width = XLGMAC_GET_REG_BITS(mac_hfr1,
+ MAC_HWF1R_ADDR64_POS,
+ MAC_HWF1R_ADDR64_LEN);
+ hw_feat->dcb = XLGMAC_GET_REG_BITS(mac_hfr1,
+ MAC_HWF1R_DCBEN_POS,
+ MAC_HWF1R_DCBEN_LEN);
+ hw_feat->sph = XLGMAC_GET_REG_BITS(mac_hfr1,
+ MAC_HWF1R_SPHEN_POS,
+ MAC_HWF1R_SPHEN_LEN);
+ hw_feat->tso = XLGMAC_GET_REG_BITS(mac_hfr1,
+ MAC_HWF1R_TSOEN_POS,
+ MAC_HWF1R_TSOEN_LEN);
+ hw_feat->dma_debug = XLGMAC_GET_REG_BITS(mac_hfr1,
+ MAC_HWF1R_DBGMEMA_POS,
+ MAC_HWF1R_DBGMEMA_LEN);
+ hw_feat->rss = XLGMAC_GET_REG_BITS(mac_hfr1,
+ MAC_HWF1R_RSSEN_POS,
+ MAC_HWF1R_RSSEN_LEN);
+ hw_feat->tc_cnt = XLGMAC_GET_REG_BITS(mac_hfr1,
+ MAC_HWF1R_NUMTC_POS,
+ MAC_HWF1R_NUMTC_LEN);
+ hw_feat->hash_table_size = XLGMAC_GET_REG_BITS(mac_hfr1,
+ MAC_HWF1R_HASHTBLSZ_POS,
+ MAC_HWF1R_HASHTBLSZ_LEN);
+ hw_feat->l3l4_filter_num = XLGMAC_GET_REG_BITS(mac_hfr1,
+ MAC_HWF1R_L3L4FNUM_POS,
+ MAC_HWF1R_L3L4FNUM_LEN);
+
+ /* Hardware feature register 2 */
+ hw_feat->rx_q_cnt = XLGMAC_GET_REG_BITS(mac_hfr2,
+ MAC_HWF2R_RXQCNT_POS,
+ MAC_HWF2R_RXQCNT_LEN);
+ hw_feat->tx_q_cnt = XLGMAC_GET_REG_BITS(mac_hfr2,
+ MAC_HWF2R_TXQCNT_POS,
+ MAC_HWF2R_TXQCNT_LEN);
+ hw_feat->rx_ch_cnt = XLGMAC_GET_REG_BITS(mac_hfr2,
+ MAC_HWF2R_RXCHCNT_POS,
+ MAC_HWF2R_RXCHCNT_LEN);
+ hw_feat->tx_ch_cnt = XLGMAC_GET_REG_BITS(mac_hfr2,
+ MAC_HWF2R_TXCHCNT_POS,
+ MAC_HWF2R_TXCHCNT_LEN);
+ hw_feat->pps_out_num = XLGMAC_GET_REG_BITS(mac_hfr2,
+ MAC_HWF2R_PPSOUTNUM_POS,
+ MAC_HWF2R_PPSOUTNUM_LEN);
+ hw_feat->aux_snap_num = XLGMAC_GET_REG_BITS(mac_hfr2,
+ MAC_HWF2R_AUXSNAPNUM_POS,
+ MAC_HWF2R_AUXSNAPNUM_LEN);
+
+ /* Translate the Hash Table size into actual number */
+ switch (hw_feat->hash_table_size) {
+ case 0:
+ break;
+ case 1:
+ hw_feat->hash_table_size = 64;
+ break;
+ case 2:
+ hw_feat->hash_table_size = 128;
+ break;
+ case 3:
+ hw_feat->hash_table_size = 256;
+ break;
+ }
+
+ /* Translate the address width setting into actual number */
+ switch (hw_feat->dma_width) {
+ case 0:
+ hw_feat->dma_width = 32;
+ break;
+ case 1:
+ hw_feat->dma_width = 40;
+ break;
+ case 2:
+ hw_feat->dma_width = 48;
+ break;
+ default:
+ hw_feat->dma_width = 32;
+ }
+
+ /* The Queue, Channel and TC counts are zero based so increment them
+ * to get the actual number
+ */
+ hw_feat->rx_q_cnt++;
+ hw_feat->tx_q_cnt++;
+ hw_feat->rx_ch_cnt++;
+ hw_feat->tx_ch_cnt++;
+ hw_feat->tc_cnt++;
+}
+
+void xlgmac_print_all_hw_features(struct xlgmac_pdata *pdata)
+{
+ char *str = NULL;
+
+ XLGMAC_PR("\n");
+ XLGMAC_PR("=====================================================\n");
+ XLGMAC_PR("\n");
+ XLGMAC_PR("HW support following features\n");
+ XLGMAC_PR("\n");
+ /* HW Feature Register0 */
+ XLGMAC_PR("VLAN Hash Filter Selected : %s\n",
+ pdata->hw_feat.vlhash ? "YES" : "NO");
+ XLGMAC_PR("SMA (MDIO) Interface : %s\n",
+ pdata->hw_feat.sma ? "YES" : "NO");
+ XLGMAC_PR("PMT Remote Wake-up Packet Enable : %s\n",
+ pdata->hw_feat.rwk ? "YES" : "NO");
+ XLGMAC_PR("PMT Magic Packet Enable : %s\n",
+ pdata->hw_feat.mgk ? "YES" : "NO");
+ XLGMAC_PR("RMON/MMC Module Enable : %s\n",
+ pdata->hw_feat.mmc ? "YES" : "NO");
+ XLGMAC_PR("ARP Offload Enabled : %s\n",
+ pdata->hw_feat.aoe ? "YES" : "NO");
+ XLGMAC_PR("IEEE 1588-2008 Timestamp Enabled : %s\n",
+ pdata->hw_feat.ts ? "YES" : "NO");
+ XLGMAC_PR("Energy Efficient Ethernet Enabled : %s\n",
+ pdata->hw_feat.eee ? "YES" : "NO");
+ XLGMAC_PR("Transmit Checksum Offload Enabled : %s\n",
+ pdata->hw_feat.tx_coe ? "YES" : "NO");
+ XLGMAC_PR("Receive Checksum Offload Enabled : %s\n",
+ pdata->hw_feat.rx_coe ? "YES" : "NO");
+ XLGMAC_PR("Additional MAC Addresses 1-31 Selected : %s\n",
+ pdata->hw_feat.addn_mac ? "YES" : "NO");
+
+ switch (pdata->hw_feat.ts_src) {
+ case 0:
+ str = "RESERVED";
+ break;
+ case 1:
+ str = "INTERNAL";
+ break;
+ case 2:
+ str = "EXTERNAL";
+ break;
+ case 3:
+ str = "BOTH";
+ break;
+ }
+ XLGMAC_PR("Timestamp System Time Source : %s\n", str);
+
+ XLGMAC_PR("Source Address or VLAN Insertion Enable : %s\n",
+ pdata->hw_feat.sa_vlan_ins ? "YES" : "NO");
+
+ /* HW Feature Register1 */
+ switch (pdata->hw_feat.rx_fifo_size) {
+ case 0:
+ str = "128 bytes";
+ break;
+ case 1:
+ str = "256 bytes";
+ break;
+ case 2:
+ str = "512 bytes";
+ break;
+ case 3:
+ str = "1 KBytes";
+ break;
+ case 4:
+ str = "2 KBytes";
+ break;
+ case 5:
+ str = "4 KBytes";
+ break;
+ case 6:
+ str = "8 KBytes";
+ break;
+ case 7:
+ str = "16 KBytes";
+ break;
+ case 8:
+ str = "32 kBytes";
+ break;
+ case 9:
+ str = "64 KBytes";
+ break;
+ case 10:
+ str = "128 KBytes";
+ break;
+ case 11:
+ str = "256 KBytes";
+ break;
+ default:
+ str = "RESERVED";
+ }
+ XLGMAC_PR("MTL Receive FIFO Size : %s\n", str);
+
+ switch (pdata->hw_feat.tx_fifo_size) {
+ case 0:
+ str = "128 bytes";
+ break;
+ case 1:
+ str = "256 bytes";
+ break;
+ case 2:
+ str = "512 bytes";
+ break;
+ case 3:
+ str = "1 KBytes";
+ break;
+ case 4:
+ str = "2 KBytes";
+ break;
+ case 5:
+ str = "4 KBytes";
+ break;
+ case 6:
+ str = "8 KBytes";
+ break;
+ case 7:
+ str = "16 KBytes";
+ break;
+ case 8:
+ str = "32 kBytes";
+ break;
+ case 9:
+ str = "64 KBytes";
+ break;
+ case 10:
+ str = "128 KBytes";
+ break;
+ case 11:
+ str = "256 KBytes";
+ break;
+ default:
+ str = "RESERVED";
+ }
+ XLGMAC_PR("MTL Transmit FIFO Size : %s\n", str);
+
+ XLGMAC_PR("IEEE 1588 High Word Register Enable : %s\n",
+ pdata->hw_feat.adv_ts_hi ? "YES" : "NO");
+ XLGMAC_PR("Address width : %u\n",
+ pdata->hw_feat.dma_width);
+ XLGMAC_PR("DCB Feature Enable : %s\n",
+ pdata->hw_feat.dcb ? "YES" : "NO");
+ XLGMAC_PR("Split Header Feature Enable : %s\n",
+ pdata->hw_feat.sph ? "YES" : "NO");
+ XLGMAC_PR("TCP Segmentation Offload Enable : %s\n",
+ pdata->hw_feat.tso ? "YES" : "NO");
+ XLGMAC_PR("DMA Debug Registers Enabled : %s\n",
+ pdata->hw_feat.dma_debug ? "YES" : "NO");
+ XLGMAC_PR("RSS Feature Enabled : %s\n",
+ pdata->hw_feat.rss ? "YES" : "NO");
+ XLGMAC_PR("Number of Traffic classes : %u\n",
+ (pdata->hw_feat.tc_cnt));
+ XLGMAC_PR("Hash Table Size : %u\n",
+ pdata->hw_feat.hash_table_size);
+ XLGMAC_PR("Total number of L3 or L4 Filters : %u\n",
+ pdata->hw_feat.l3l4_filter_num);
+
+ /* HW Feature Register2 */
+ XLGMAC_PR("Number of MTL Receive Queues : %u\n",
+ pdata->hw_feat.rx_q_cnt);
+ XLGMAC_PR("Number of MTL Transmit Queues : %u\n",
+ pdata->hw_feat.tx_q_cnt);
+ XLGMAC_PR("Number of DMA Receive Channels : %u\n",
+ pdata->hw_feat.rx_ch_cnt);
+ XLGMAC_PR("Number of DMA Transmit Channels : %u\n",
+ pdata->hw_feat.tx_ch_cnt);
+
+ switch (pdata->hw_feat.pps_out_num) {
+ case 0:
+ str = "No PPS output";
+ break;
+ case 1:
+ str = "1 PPS output";
+ break;
+ case 2:
+ str = "2 PPS output";
+ break;
+ case 3:
+ str = "3 PPS output";
+ break;
+ case 4:
+ str = "4 PPS output";
+ break;
+ default:
+ str = "RESERVED";
+ }
+ XLGMAC_PR("Number of PPS Outputs : %s\n", str);
+
+ switch (pdata->hw_feat.aux_snap_num) {
+ case 0:
+ str = "No auxiliary input";
+ break;
+ case 1:
+ str = "1 auxiliary input";
+ break;
+ case 2:
+ str = "2 auxiliary input";
+ break;
+ case 3:
+ str = "3 auxiliary input";
+ break;
+ case 4:
+ str = "4 auxiliary input";
+ break;
+ default:
+ str = "RESERVED";
+ }
+ XLGMAC_PR("Number of Auxiliary Snapshot Inputs : %s", str);
+
+ XLGMAC_PR("\n");
+ XLGMAC_PR("=====================================================\n");
+ XLGMAC_PR("\n");
+}
--- /dev/null
+/* Synopsys DesignWare Core Enterprise Ethernet (XLGMAC) Driver
+ *
+ * Copyright (c) 2017 Synopsys, Inc. (www.synopsys.com)
+ *
+ * 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; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This Synopsys DWC XLGMAC software driver and associated documentation
+ * (hereinafter the "Software") is an unsupported proprietary work of
+ * Synopsys, Inc. unless otherwise expressly agreed to in writing between
+ * Synopsys and you. The Software IS NOT an item of Licensed Software or a
+ * Licensed Product under any End User Software License Agreement or
+ * Agreement for Licensed Products with Synopsys or any supplement thereto.
+ * Synopsys is a registered trademark of Synopsys, Inc. Other names included
+ * in the SOFTWARE may be the trademarks of their respective owners.
+ */
+
+#include "dwc-xlgmac.h"
+#include "dwc-xlgmac-reg.h"
+
+static void xlgmac_unmap_desc_data(struct xlgmac_pdata *pdata,
+ struct xlgmac_desc_data *desc_data)
+{
+ if (desc_data->skb_dma) {
+ if (desc_data->mapped_as_page) {
+ dma_unmap_page(pdata->dev, desc_data->skb_dma,
+ desc_data->skb_dma_len, DMA_TO_DEVICE);
+ } else {
+ dma_unmap_single(pdata->dev, desc_data->skb_dma,
+ desc_data->skb_dma_len, DMA_TO_DEVICE);
+ }
+ desc_data->skb_dma = 0;
+ desc_data->skb_dma_len = 0;
+ }
+
+ if (desc_data->skb) {
+ dev_kfree_skb_any(desc_data->skb);
+ desc_data->skb = NULL;
+ }
+
+ if (desc_data->rx.hdr.pa.pages)
+ put_page(desc_data->rx.hdr.pa.pages);
+
+ if (desc_data->rx.hdr.pa_unmap.pages) {
+ dma_unmap_page(pdata->dev, desc_data->rx.hdr.pa_unmap.pages_dma,
+ desc_data->rx.hdr.pa_unmap.pages_len,
+ DMA_FROM_DEVICE);
+ put_page(desc_data->rx.hdr.pa_unmap.pages);
+ }
+
+ if (desc_data->rx.buf.pa.pages)
+ put_page(desc_data->rx.buf.pa.pages);
+
+ if (desc_data->rx.buf.pa_unmap.pages) {
+ dma_unmap_page(pdata->dev, desc_data->rx.buf.pa_unmap.pages_dma,
+ desc_data->rx.buf.pa_unmap.pages_len,
+ DMA_FROM_DEVICE);
+ put_page(desc_data->rx.buf.pa_unmap.pages);
+ }
+
+ memset(&desc_data->tx, 0, sizeof(desc_data->tx));
+ memset(&desc_data->rx, 0, sizeof(desc_data->rx));
+
+ desc_data->mapped_as_page = 0;
+
+ if (desc_data->state_saved) {
+ desc_data->state_saved = 0;
+ desc_data->state.skb = NULL;
+ desc_data->state.len = 0;
+ desc_data->state.error = 0;
+ }
+}
+
+static void xlgmac_free_ring(struct xlgmac_pdata *pdata,
+ struct xlgmac_ring *ring)
+{
+ struct xlgmac_desc_data *desc_data;
+ unsigned int i;
+
+ if (!ring)
+ return;
+
+ if (ring->desc_data_head) {
+ for (i = 0; i < ring->dma_desc_count; i++) {
+ desc_data = XLGMAC_GET_DESC_DATA(ring, i);
+ xlgmac_unmap_desc_data(pdata, desc_data);
+ }
+
+ kfree(ring->desc_data_head);
+ ring->desc_data_head = NULL;
+ }
+
+ if (ring->rx_hdr_pa.pages) {
+ dma_unmap_page(pdata->dev, ring->rx_hdr_pa.pages_dma,
+ ring->rx_hdr_pa.pages_len, DMA_FROM_DEVICE);
+ put_page(ring->rx_hdr_pa.pages);
+
+ ring->rx_hdr_pa.pages = NULL;
+ ring->rx_hdr_pa.pages_len = 0;
+ ring->rx_hdr_pa.pages_offset = 0;
+ ring->rx_hdr_pa.pages_dma = 0;
+ }
+
+ if (ring->rx_buf_pa.pages) {
+ dma_unmap_page(pdata->dev, ring->rx_buf_pa.pages_dma,
+ ring->rx_buf_pa.pages_len, DMA_FROM_DEVICE);
+ put_page(ring->rx_buf_pa.pages);
+
+ ring->rx_buf_pa.pages = NULL;
+ ring->rx_buf_pa.pages_len = 0;
+ ring->rx_buf_pa.pages_offset = 0;
+ ring->rx_buf_pa.pages_dma = 0;
+ }
+
+ if (ring->dma_desc_head) {
+ dma_free_coherent(pdata->dev,
+ (sizeof(struct xlgmac_dma_desc) *
+ ring->dma_desc_count),
+ ring->dma_desc_head,
+ ring->dma_desc_head_addr);
+ ring->dma_desc_head = NULL;
+ }
+}
+
+static int xlgmac_init_ring(struct xlgmac_pdata *pdata,
+ struct xlgmac_ring *ring,
+ unsigned int dma_desc_count)
+{
+ if (!ring)
+ return 0;
+
+ /* Descriptors */
+ ring->dma_desc_count = dma_desc_count;
+ ring->dma_desc_head = dma_alloc_coherent(pdata->dev,
+ (sizeof(struct xlgmac_dma_desc) *
+ dma_desc_count),
+ &ring->dma_desc_head_addr,
+ GFP_KERNEL);
+ if (!ring->dma_desc_head)
+ return -ENOMEM;
+
+ /* Array of descriptor data */
+ ring->desc_data_head = kcalloc(dma_desc_count,
+ sizeof(struct xlgmac_desc_data),
+ GFP_KERNEL);
+ if (!ring->desc_data_head)
+ return -ENOMEM;
+
+ netif_dbg(pdata, drv, pdata->netdev,
+ "dma_desc_head=%p, dma_desc_head_addr=%pad, desc_data_head=%p\n",
+ ring->dma_desc_head,
+ &ring->dma_desc_head_addr,
+ ring->desc_data_head);
+
+ return 0;
+}
+
+static void xlgmac_free_rings(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+
+ if (!pdata->channel_head)
+ return;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ xlgmac_free_ring(pdata, channel->tx_ring);
+ xlgmac_free_ring(pdata, channel->rx_ring);
+ }
+}
+
+static int xlgmac_alloc_rings(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+ int ret;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ netif_dbg(pdata, drv, pdata->netdev, "%s - Tx ring:\n",
+ channel->name);
+
+ ret = xlgmac_init_ring(pdata, channel->tx_ring,
+ pdata->tx_desc_count);
+
+ if (ret) {
+ netdev_alert(pdata->netdev,
+ "error initializing Tx ring");
+ goto err_init_ring;
+ }
+
+ netif_dbg(pdata, drv, pdata->netdev, "%s - Rx ring:\n",
+ channel->name);
+
+ ret = xlgmac_init_ring(pdata, channel->rx_ring,
+ pdata->rx_desc_count);
+ if (ret) {
+ netdev_alert(pdata->netdev,
+ "error initializing Rx ring\n");
+ goto err_init_ring;
+ }
+ }
+
+ return 0;
+
+err_init_ring:
+ xlgmac_free_rings(pdata);
+
+ return ret;
+}
+
+static void xlgmac_free_channels(struct xlgmac_pdata *pdata)
+{
+ if (!pdata->channel_head)
+ return;
+
+ kfree(pdata->channel_head->tx_ring);
+ pdata->channel_head->tx_ring = NULL;
+
+ kfree(pdata->channel_head->rx_ring);
+ pdata->channel_head->rx_ring = NULL;
+
+ kfree(pdata->channel_head);
+
+ pdata->channel_head = NULL;
+ pdata->channel_count = 0;
+}
+
+static int xlgmac_alloc_channels(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel_head, *channel;
+ struct xlgmac_ring *tx_ring, *rx_ring;
+ int ret = -ENOMEM;
+ unsigned int i;
+
+ channel_head = kcalloc(pdata->channel_count,
+ sizeof(struct xlgmac_channel), GFP_KERNEL);
+ if (!channel_head)
+ return ret;
+
+ netif_dbg(pdata, drv, pdata->netdev,
+ "channel_head=%p\n", channel_head);
+
+ tx_ring = kcalloc(pdata->tx_ring_count, sizeof(struct xlgmac_ring),
+ GFP_KERNEL);
+ if (!tx_ring)
+ goto err_tx_ring;
+
+ rx_ring = kcalloc(pdata->rx_ring_count, sizeof(struct xlgmac_ring),
+ GFP_KERNEL);
+ if (!rx_ring)
+ goto err_rx_ring;
+
+ for (i = 0, channel = channel_head; i < pdata->channel_count;
+ i++, channel++) {
+ snprintf(channel->name, sizeof(channel->name), "channel-%u", i);
+ channel->pdata = pdata;
+ channel->queue_index = i;
+ channel->dma_regs = pdata->mac_regs + DMA_CH_BASE +
+ (DMA_CH_INC * i);
+
+ if (pdata->per_channel_irq) {
+ /* Get the per DMA interrupt */
+ ret = pdata->channel_irq[i];
+ if (ret < 0) {
+ netdev_err(pdata->netdev,
+ "get_irq %u failed\n",
+ i + 1);
+ goto err_irq;
+ }
+ channel->dma_irq = ret;
+ }
+
+ if (i < pdata->tx_ring_count)
+ channel->tx_ring = tx_ring++;
+
+ if (i < pdata->rx_ring_count)
+ channel->rx_ring = rx_ring++;
+
+ netif_dbg(pdata, drv, pdata->netdev,
+ "%s: dma_regs=%p, tx_ring=%p, rx_ring=%p\n",
+ channel->name, channel->dma_regs,
+ channel->tx_ring, channel->rx_ring);
+ }
+
+ pdata->channel_head = channel_head;
+
+ return 0;
+
+err_irq:
+ kfree(rx_ring);
+
+err_rx_ring:
+ kfree(tx_ring);
+
+err_tx_ring:
+ kfree(channel_head);
+
+ return ret;
+}
+
+static void xlgmac_free_channels_and_rings(struct xlgmac_pdata *pdata)
+{
+ xlgmac_free_rings(pdata);
+
+ xlgmac_free_channels(pdata);
+}
+
+static int xlgmac_alloc_channels_and_rings(struct xlgmac_pdata *pdata)
+{
+ int ret;
+
+ ret = xlgmac_alloc_channels(pdata);
+ if (ret)
+ goto err_alloc;
+
+ ret = xlgmac_alloc_rings(pdata);
+ if (ret)
+ goto err_alloc;
+
+ return 0;
+
+err_alloc:
+ xlgmac_free_channels_and_rings(pdata);
+
+ return ret;
+}
+
+static int xlgmac_alloc_pages(struct xlgmac_pdata *pdata,
+ struct xlgmac_page_alloc *pa,
+ gfp_t gfp, int order)
+{
+ struct page *pages = NULL;
+ dma_addr_t pages_dma;
+ int ret;
+
+ /* Try to obtain pages, decreasing order if necessary */
+ gfp |= __GFP_COLD | __GFP_COMP | __GFP_NOWARN;
+ while (order >= 0) {
+ pages = alloc_pages(gfp, order);
+ if (pages)
+ break;
+
+ order--;
+ }
+ if (!pages)
+ return -ENOMEM;
+
+ /* Map the pages */
+ pages_dma = dma_map_page(pdata->dev, pages, 0,
+ PAGE_SIZE << order, DMA_FROM_DEVICE);
+ ret = dma_mapping_error(pdata->dev, pages_dma);
+ if (ret) {
+ put_page(pages);
+ return ret;
+ }
+
+ pa->pages = pages;
+ pa->pages_len = PAGE_SIZE << order;
+ pa->pages_offset = 0;
+ pa->pages_dma = pages_dma;
+
+ return 0;
+}
+
+static void xlgmac_set_buffer_data(struct xlgmac_buffer_data *bd,
+ struct xlgmac_page_alloc *pa,
+ unsigned int len)
+{
+ get_page(pa->pages);
+ bd->pa = *pa;
+
+ bd->dma_base = pa->pages_dma;
+ bd->dma_off = pa->pages_offset;
+ bd->dma_len = len;
+
+ pa->pages_offset += len;
+ if ((pa->pages_offset + len) > pa->pages_len) {
+ /* This data descriptor is responsible for unmapping page(s) */
+ bd->pa_unmap = *pa;
+
+ /* Get a new allocation next time */
+ pa->pages = NULL;
+ pa->pages_len = 0;
+ pa->pages_offset = 0;
+ pa->pages_dma = 0;
+ }
+}
+
+static int xlgmac_map_rx_buffer(struct xlgmac_pdata *pdata,
+ struct xlgmac_ring *ring,
+ struct xlgmac_desc_data *desc_data)
+{
+ int order, ret;
+
+ if (!ring->rx_hdr_pa.pages) {
+ ret = xlgmac_alloc_pages(pdata, &ring->rx_hdr_pa,
+ GFP_ATOMIC, 0);
+ if (ret)
+ return ret;
+ }
+
+ if (!ring->rx_buf_pa.pages) {
+ order = max_t(int, PAGE_ALLOC_COSTLY_ORDER - 1, 0);
+ ret = xlgmac_alloc_pages(pdata, &ring->rx_buf_pa,
+ GFP_ATOMIC, order);
+ if (ret)
+ return ret;
+ }
+
+ /* Set up the header page info */
+ xlgmac_set_buffer_data(&desc_data->rx.hdr, &ring->rx_hdr_pa,
+ XLGMAC_SKB_ALLOC_SIZE);
+
+ /* Set up the buffer page info */
+ xlgmac_set_buffer_data(&desc_data->rx.buf, &ring->rx_buf_pa,
+ pdata->rx_buf_size);
+
+ return 0;
+}
+
+static void xlgmac_tx_desc_init(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
+ struct xlgmac_desc_data *desc_data;
+ struct xlgmac_dma_desc *dma_desc;
+ struct xlgmac_channel *channel;
+ struct xlgmac_ring *ring;
+ dma_addr_t dma_desc_addr;
+ unsigned int i, j;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ ring = channel->tx_ring;
+ if (!ring)
+ break;
+
+ dma_desc = ring->dma_desc_head;
+ dma_desc_addr = ring->dma_desc_head_addr;
+
+ for (j = 0; j < ring->dma_desc_count; j++) {
+ desc_data = XLGMAC_GET_DESC_DATA(ring, j);
+
+ desc_data->dma_desc = dma_desc;
+ desc_data->dma_desc_addr = dma_desc_addr;
+
+ dma_desc++;
+ dma_desc_addr += sizeof(struct xlgmac_dma_desc);
+ }
+
+ ring->cur = 0;
+ ring->dirty = 0;
+ memset(&ring->tx, 0, sizeof(ring->tx));
+
+ hw_ops->tx_desc_init(channel);
+ }
+}
+
+static void xlgmac_rx_desc_init(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
+ struct xlgmac_desc_data *desc_data;
+ struct xlgmac_dma_desc *dma_desc;
+ struct xlgmac_channel *channel;
+ struct xlgmac_ring *ring;
+ dma_addr_t dma_desc_addr;
+ unsigned int i, j;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ ring = channel->rx_ring;
+ if (!ring)
+ break;
+
+ dma_desc = ring->dma_desc_head;
+ dma_desc_addr = ring->dma_desc_head_addr;
+
+ for (j = 0; j < ring->dma_desc_count; j++) {
+ desc_data = XLGMAC_GET_DESC_DATA(ring, j);
+
+ desc_data->dma_desc = dma_desc;
+ desc_data->dma_desc_addr = dma_desc_addr;
+
+ if (xlgmac_map_rx_buffer(pdata, ring, desc_data))
+ break;
+
+ dma_desc++;
+ dma_desc_addr += sizeof(struct xlgmac_dma_desc);
+ }
+
+ ring->cur = 0;
+ ring->dirty = 0;
+
+ hw_ops->rx_desc_init(channel);
+ }
+}
+
+static int xlgmac_map_tx_skb(struct xlgmac_channel *channel,
+ struct sk_buff *skb)
+{
+ struct xlgmac_pdata *pdata = channel->pdata;
+ struct xlgmac_ring *ring = channel->tx_ring;
+ unsigned int start_index, cur_index;
+ struct xlgmac_desc_data *desc_data;
+ unsigned int offset, datalen, len;
+ struct xlgmac_pkt_info *pkt_info;
+ struct skb_frag_struct *frag;
+ unsigned int tso, vlan;
+ dma_addr_t skb_dma;
+ unsigned int i;
+
+ offset = 0;
+ start_index = ring->cur;
+ cur_index = ring->cur;
+
+ pkt_info = &ring->pkt_info;
+ pkt_info->desc_count = 0;
+ pkt_info->length = 0;
+
+ tso = XLGMAC_GET_REG_BITS(pkt_info->attributes,
+ TX_PACKET_ATTRIBUTES_TSO_ENABLE_POS,
+ TX_PACKET_ATTRIBUTES_TSO_ENABLE_LEN);
+ vlan = XLGMAC_GET_REG_BITS(pkt_info->attributes,
+ TX_PACKET_ATTRIBUTES_VLAN_CTAG_POS,
+ TX_PACKET_ATTRIBUTES_VLAN_CTAG_LEN);
+
+ /* Save space for a context descriptor if needed */
+ if ((tso && (pkt_info->mss != ring->tx.cur_mss)) ||
+ (vlan && (pkt_info->vlan_ctag != ring->tx.cur_vlan_ctag)))
+ cur_index++;
+ desc_data = XLGMAC_GET_DESC_DATA(ring, cur_index);
+
+ if (tso) {
+ /* Map the TSO header */
+ skb_dma = dma_map_single(pdata->dev, skb->data,
+ pkt_info->header_len, DMA_TO_DEVICE);
+ if (dma_mapping_error(pdata->dev, skb_dma)) {
+ netdev_alert(pdata->netdev, "dma_map_single failed\n");
+ goto err_out;
+ }
+ desc_data->skb_dma = skb_dma;
+ desc_data->skb_dma_len = pkt_info->header_len;
+ netif_dbg(pdata, tx_queued, pdata->netdev,
+ "skb header: index=%u, dma=%pad, len=%u\n",
+ cur_index, &skb_dma, pkt_info->header_len);
+
+ offset = pkt_info->header_len;
+
+ pkt_info->length += pkt_info->header_len;
+
+ cur_index++;
+ desc_data = XLGMAC_GET_DESC_DATA(ring, cur_index);
+ }
+
+ /* Map the (remainder of the) packet */
+ for (datalen = skb_headlen(skb) - offset; datalen; ) {
+ len = min_t(unsigned int, datalen, XLGMAC_TX_MAX_BUF_SIZE);
+
+ skb_dma = dma_map_single(pdata->dev, skb->data + offset, len,
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(pdata->dev, skb_dma)) {
+ netdev_alert(pdata->netdev, "dma_map_single failed\n");
+ goto err_out;
+ }
+ desc_data->skb_dma = skb_dma;
+ desc_data->skb_dma_len = len;
+ netif_dbg(pdata, tx_queued, pdata->netdev,
+ "skb data: index=%u, dma=%pad, len=%u\n",
+ cur_index, &skb_dma, len);
+
+ datalen -= len;
+ offset += len;
+
+ pkt_info->length += len;
+
+ cur_index++;
+ desc_data = XLGMAC_GET_DESC_DATA(ring, cur_index);
+ }
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ netif_dbg(pdata, tx_queued, pdata->netdev,
+ "mapping frag %u\n", i);
+
+ frag = &skb_shinfo(skb)->frags[i];
+ offset = 0;
+
+ for (datalen = skb_frag_size(frag); datalen; ) {
+ len = min_t(unsigned int, datalen,
+ XLGMAC_TX_MAX_BUF_SIZE);
+
+ skb_dma = skb_frag_dma_map(pdata->dev, frag, offset,
+ len, DMA_TO_DEVICE);
+ if (dma_mapping_error(pdata->dev, skb_dma)) {
+ netdev_alert(pdata->netdev,
+ "skb_frag_dma_map failed\n");
+ goto err_out;
+ }
+ desc_data->skb_dma = skb_dma;
+ desc_data->skb_dma_len = len;
+ desc_data->mapped_as_page = 1;
+ netif_dbg(pdata, tx_queued, pdata->netdev,
+ "skb frag: index=%u, dma=%pad, len=%u\n",
+ cur_index, &skb_dma, len);
+
+ datalen -= len;
+ offset += len;
+
+ pkt_info->length += len;
+
+ cur_index++;
+ desc_data = XLGMAC_GET_DESC_DATA(ring, cur_index);
+ }
+ }
+
+ /* Save the skb address in the last entry. We always have some data
+ * that has been mapped so desc_data is always advanced past the last
+ * piece of mapped data - use the entry pointed to by cur_index - 1.
+ */
+ desc_data = XLGMAC_GET_DESC_DATA(ring, cur_index - 1);
+ desc_data->skb = skb;
+
+ /* Save the number of descriptor entries used */
+ pkt_info->desc_count = cur_index - start_index;
+
+ return pkt_info->desc_count;
+
+err_out:
+ while (start_index < cur_index) {
+ desc_data = XLGMAC_GET_DESC_DATA(ring, start_index++);
+ xlgmac_unmap_desc_data(pdata, desc_data);
+ }
+
+ return 0;
+}
+
+void xlgmac_init_desc_ops(struct xlgmac_desc_ops *desc_ops)
+{
+ desc_ops->alloc_channles_and_rings = xlgmac_alloc_channels_and_rings;
+ desc_ops->free_channels_and_rings = xlgmac_free_channels_and_rings;
+ desc_ops->map_tx_skb = xlgmac_map_tx_skb;
+ desc_ops->map_rx_buffer = xlgmac_map_rx_buffer;
+ desc_ops->unmap_desc_data = xlgmac_unmap_desc_data;
+ desc_ops->tx_desc_init = xlgmac_tx_desc_init;
+ desc_ops->rx_desc_init = xlgmac_rx_desc_init;
+}
--- /dev/null
+/* Synopsys DesignWare Core Enterprise Ethernet (XLGMAC) Driver
+ *
+ * Copyright (c) 2017 Synopsys, Inc. (www.synopsys.com)
+ *
+ * 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; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This Synopsys DWC XLGMAC software driver and associated documentation
+ * (hereinafter the "Software") is an unsupported proprietary work of
+ * Synopsys, Inc. unless otherwise expressly agreed to in writing between
+ * Synopsys and you. The Software IS NOT an item of Licensed Software or a
+ * Licensed Product under any End User Software License Agreement or
+ * Agreement for Licensed Products with Synopsys or any supplement thereto.
+ * Synopsys is a registered trademark of Synopsys, Inc. Other names included
+ * in the SOFTWARE may be the trademarks of their respective owners.
+ */
+
+#include <linux/phy.h>
+#include <linux/mdio.h>
+#include <linux/clk.h>
+#include <linux/bitrev.h>
+#include <linux/crc32.h>
+
+#include "dwc-xlgmac.h"
+#include "dwc-xlgmac-reg.h"
+
+static int xlgmac_tx_complete(struct xlgmac_dma_desc *dma_desc)
+{
+ return !XLGMAC_GET_REG_BITS_LE(dma_desc->desc3,
+ TX_NORMAL_DESC3_OWN_POS,
+ TX_NORMAL_DESC3_OWN_LEN);
+}
+
+static int xlgmac_disable_rx_csum(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = readl(pdata->mac_regs + MAC_RCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RCR_IPC_POS,
+ MAC_RCR_IPC_LEN, 0);
+ writel(regval, pdata->mac_regs + MAC_RCR);
+
+ return 0;
+}
+
+static int xlgmac_enable_rx_csum(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = readl(pdata->mac_regs + MAC_RCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RCR_IPC_POS,
+ MAC_RCR_IPC_LEN, 1);
+ writel(regval, pdata->mac_regs + MAC_RCR);
+
+ return 0;
+}
+
+static int xlgmac_set_mac_address(struct xlgmac_pdata *pdata, u8 *addr)
+{
+ unsigned int mac_addr_hi, mac_addr_lo;
+
+ mac_addr_hi = (addr[5] << 8) | (addr[4] << 0);
+ mac_addr_lo = (addr[3] << 24) | (addr[2] << 16) |
+ (addr[1] << 8) | (addr[0] << 0);
+
+ writel(mac_addr_hi, pdata->mac_regs + MAC_MACA0HR);
+ writel(mac_addr_lo, pdata->mac_regs + MAC_MACA0LR);
+
+ return 0;
+}
+
+static void xlgmac_set_mac_reg(struct xlgmac_pdata *pdata,
+ struct netdev_hw_addr *ha,
+ unsigned int *mac_reg)
+{
+ unsigned int mac_addr_hi, mac_addr_lo;
+ u8 *mac_addr;
+
+ mac_addr_lo = 0;
+ mac_addr_hi = 0;
+
+ if (ha) {
+ mac_addr = (u8 *)&mac_addr_lo;
+ mac_addr[0] = ha->addr[0];
+ mac_addr[1] = ha->addr[1];
+ mac_addr[2] = ha->addr[2];
+ mac_addr[3] = ha->addr[3];
+ mac_addr = (u8 *)&mac_addr_hi;
+ mac_addr[0] = ha->addr[4];
+ mac_addr[1] = ha->addr[5];
+
+ netif_dbg(pdata, drv, pdata->netdev,
+ "adding mac address %pM at %#x\n",
+ ha->addr, *mac_reg);
+
+ mac_addr_hi = XLGMAC_SET_REG_BITS(mac_addr_hi,
+ MAC_MACA1HR_AE_POS,
+ MAC_MACA1HR_AE_LEN,
+ 1);
+ }
+
+ writel(mac_addr_hi, pdata->mac_regs + *mac_reg);
+ *mac_reg += MAC_MACA_INC;
+ writel(mac_addr_lo, pdata->mac_regs + *mac_reg);
+ *mac_reg += MAC_MACA_INC;
+}
+
+static int xlgmac_enable_rx_vlan_stripping(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = readl(pdata->mac_regs + MAC_VLANTR);
+ /* Put the VLAN tag in the Rx descriptor */
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_VLANTR_EVLRXS_POS,
+ MAC_VLANTR_EVLRXS_LEN, 1);
+ /* Don't check the VLAN type */
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_VLANTR_DOVLTC_POS,
+ MAC_VLANTR_DOVLTC_LEN, 1);
+ /* Check only C-TAG (0x8100) packets */
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_VLANTR_ERSVLM_POS,
+ MAC_VLANTR_ERSVLM_LEN, 0);
+ /* Don't consider an S-TAG (0x88A8) packet as a VLAN packet */
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_VLANTR_ESVL_POS,
+ MAC_VLANTR_ESVL_LEN, 0);
+ /* Enable VLAN tag stripping */
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_VLANTR_EVLS_POS,
+ MAC_VLANTR_EVLS_LEN, 0x3);
+ writel(regval, pdata->mac_regs + MAC_VLANTR);
+
+ return 0;
+}
+
+static int xlgmac_disable_rx_vlan_stripping(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = readl(pdata->mac_regs + MAC_VLANTR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_VLANTR_EVLS_POS,
+ MAC_VLANTR_EVLS_LEN, 0);
+ writel(regval, pdata->mac_regs + MAC_VLANTR);
+
+ return 0;
+}
+
+static int xlgmac_enable_rx_vlan_filtering(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = readl(pdata->mac_regs + MAC_PFR);
+ /* Enable VLAN filtering */
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_PFR_VTFE_POS,
+ MAC_PFR_VTFE_LEN, 1);
+ writel(regval, pdata->mac_regs + MAC_PFR);
+
+ regval = readl(pdata->mac_regs + MAC_VLANTR);
+ /* Enable VLAN Hash Table filtering */
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_VLANTR_VTHM_POS,
+ MAC_VLANTR_VTHM_LEN, 1);
+ /* Disable VLAN tag inverse matching */
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_VLANTR_VTIM_POS,
+ MAC_VLANTR_VTIM_LEN, 0);
+ /* Only filter on the lower 12-bits of the VLAN tag */
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_VLANTR_ETV_POS,
+ MAC_VLANTR_ETV_LEN, 1);
+ /* In order for the VLAN Hash Table filtering to be effective,
+ * the VLAN tag identifier in the VLAN Tag Register must not
+ * be zero. Set the VLAN tag identifier to "1" to enable the
+ * VLAN Hash Table filtering. This implies that a VLAN tag of
+ * 1 will always pass filtering.
+ */
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_VLANTR_VL_POS,
+ MAC_VLANTR_VL_LEN, 1);
+ writel(regval, pdata->mac_regs + MAC_VLANTR);
+
+ return 0;
+}
+
+static int xlgmac_disable_rx_vlan_filtering(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = readl(pdata->mac_regs + MAC_PFR);
+ /* Disable VLAN filtering */
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_PFR_VTFE_POS,
+ MAC_PFR_VTFE_LEN, 0);
+ writel(regval, pdata->mac_regs + MAC_PFR);
+
+ return 0;
+}
+
+static u32 xlgmac_vid_crc32_le(__le16 vid_le)
+{
+ unsigned char *data = (unsigned char *)&vid_le;
+ unsigned char data_byte = 0;
+ u32 poly = 0xedb88320;
+ u32 crc = ~0;
+ u32 temp = 0;
+ int i, bits;
+
+ bits = get_bitmask_order(VLAN_VID_MASK);
+ for (i = 0; i < bits; i++) {
+ if ((i % 8) == 0)
+ data_byte = data[i / 8];
+
+ temp = ((crc & 1) ^ data_byte) & 1;
+ crc >>= 1;
+ data_byte >>= 1;
+
+ if (temp)
+ crc ^= poly;
+ }
+
+ return crc;
+}
+
+static int xlgmac_update_vlan_hash_table(struct xlgmac_pdata *pdata)
+{
+ u16 vlan_hash_table = 0;
+ __le16 vid_le;
+ u32 regval;
+ u32 crc;
+ u16 vid;
+
+ /* Generate the VLAN Hash Table value */
+ for_each_set_bit(vid, pdata->active_vlans, VLAN_N_VID) {
+ /* Get the CRC32 value of the VLAN ID */
+ vid_le = cpu_to_le16(vid);
+ crc = bitrev32(~xlgmac_vid_crc32_le(vid_le)) >> 28;
+
+ vlan_hash_table |= (1 << crc);
+ }
+
+ regval = readl(pdata->mac_regs + MAC_VLANHTR);
+ /* Set the VLAN Hash Table filtering register */
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_VLANHTR_VLHT_POS,
+ MAC_VLANHTR_VLHT_LEN, vlan_hash_table);
+ writel(regval, pdata->mac_regs + MAC_VLANHTR);
+
+ return 0;
+}
+
+static int xlgmac_set_promiscuous_mode(struct xlgmac_pdata *pdata,
+ unsigned int enable)
+{
+ unsigned int val = enable ? 1 : 0;
+ u32 regval;
+
+ regval = XLGMAC_GET_REG_BITS(readl(pdata->mac_regs + MAC_PFR),
+ MAC_PFR_PR_POS, MAC_PFR_PR_LEN);
+ if (regval == val)
+ return 0;
+
+ netif_dbg(pdata, drv, pdata->netdev, "%s promiscuous mode\n",
+ enable ? "entering" : "leaving");
+
+ regval = readl(pdata->mac_regs + MAC_PFR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_PFR_PR_POS,
+ MAC_PFR_PR_LEN, val);
+ writel(regval, pdata->mac_regs + MAC_PFR);
+
+ /* Hardware will still perform VLAN filtering in promiscuous mode */
+ if (enable) {
+ xlgmac_disable_rx_vlan_filtering(pdata);
+ } else {
+ if (pdata->netdev->features & NETIF_F_HW_VLAN_CTAG_FILTER)
+ xlgmac_enable_rx_vlan_filtering(pdata);
+ }
+
+ return 0;
+}
+
+static int xlgmac_set_all_multicast_mode(struct xlgmac_pdata *pdata,
+ unsigned int enable)
+{
+ unsigned int val = enable ? 1 : 0;
+ u32 regval;
+
+ regval = XLGMAC_GET_REG_BITS(readl(pdata->mac_regs + MAC_PFR),
+ MAC_PFR_PM_POS, MAC_PFR_PM_LEN);
+ if (regval == val)
+ return 0;
+
+ netif_dbg(pdata, drv, pdata->netdev, "%s allmulti mode\n",
+ enable ? "entering" : "leaving");
+
+ regval = readl(pdata->mac_regs + MAC_PFR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_PFR_PM_POS,
+ MAC_PFR_PM_LEN, val);
+ writel(regval, pdata->mac_regs + MAC_PFR);
+
+ return 0;
+}
+
+static void xlgmac_set_mac_addn_addrs(struct xlgmac_pdata *pdata)
+{
+ struct net_device *netdev = pdata->netdev;
+ struct netdev_hw_addr *ha;
+ unsigned int addn_macs;
+ unsigned int mac_reg;
+
+ mac_reg = MAC_MACA1HR;
+ addn_macs = pdata->hw_feat.addn_mac;
+
+ if (netdev_uc_count(netdev) > addn_macs) {
+ xlgmac_set_promiscuous_mode(pdata, 1);
+ } else {
+ netdev_for_each_uc_addr(ha, netdev) {
+ xlgmac_set_mac_reg(pdata, ha, &mac_reg);
+ addn_macs--;
+ }
+
+ if (netdev_mc_count(netdev) > addn_macs) {
+ xlgmac_set_all_multicast_mode(pdata, 1);
+ } else {
+ netdev_for_each_mc_addr(ha, netdev) {
+ xlgmac_set_mac_reg(pdata, ha, &mac_reg);
+ addn_macs--;
+ }
+ }
+ }
+
+ /* Clear remaining additional MAC address entries */
+ while (addn_macs--)
+ xlgmac_set_mac_reg(pdata, NULL, &mac_reg);
+}
+
+static void xlgmac_set_mac_hash_table(struct xlgmac_pdata *pdata)
+{
+ unsigned int hash_table_shift, hash_table_count;
+ u32 hash_table[XLGMAC_MAC_HASH_TABLE_SIZE];
+ struct net_device *netdev = pdata->netdev;
+ struct netdev_hw_addr *ha;
+ unsigned int hash_reg;
+ unsigned int i;
+ u32 crc;
+
+ hash_table_shift = 26 - (pdata->hw_feat.hash_table_size >> 7);
+ hash_table_count = pdata->hw_feat.hash_table_size / 32;
+ memset(hash_table, 0, sizeof(hash_table));
+
+ /* Build the MAC Hash Table register values */
+ netdev_for_each_uc_addr(ha, netdev) {
+ crc = bitrev32(~crc32_le(~0, ha->addr, ETH_ALEN));
+ crc >>= hash_table_shift;
+ hash_table[crc >> 5] |= (1 << (crc & 0x1f));
+ }
+
+ netdev_for_each_mc_addr(ha, netdev) {
+ crc = bitrev32(~crc32_le(~0, ha->addr, ETH_ALEN));
+ crc >>= hash_table_shift;
+ hash_table[crc >> 5] |= (1 << (crc & 0x1f));
+ }
+
+ /* Set the MAC Hash Table registers */
+ hash_reg = MAC_HTR0;
+ for (i = 0; i < hash_table_count; i++) {
+ writel(hash_table[i], pdata->mac_regs + hash_reg);
+ hash_reg += MAC_HTR_INC;
+ }
+}
+
+static int xlgmac_add_mac_addresses(struct xlgmac_pdata *pdata)
+{
+ if (pdata->hw_feat.hash_table_size)
+ xlgmac_set_mac_hash_table(pdata);
+ else
+ xlgmac_set_mac_addn_addrs(pdata);
+
+ return 0;
+}
+
+static void xlgmac_config_mac_address(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ xlgmac_set_mac_address(pdata, pdata->netdev->dev_addr);
+
+ /* Filtering is done using perfect filtering and hash filtering */
+ if (pdata->hw_feat.hash_table_size) {
+ regval = readl(pdata->mac_regs + MAC_PFR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_PFR_HPF_POS,
+ MAC_PFR_HPF_LEN, 1);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_PFR_HUC_POS,
+ MAC_PFR_HUC_LEN, 1);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_PFR_HMC_POS,
+ MAC_PFR_HMC_LEN, 1);
+ writel(regval, pdata->mac_regs + MAC_PFR);
+ }
+}
+
+static void xlgmac_config_jumbo_enable(struct xlgmac_pdata *pdata)
+{
+ unsigned int val;
+ u32 regval;
+
+ val = (pdata->netdev->mtu > XLGMAC_STD_PACKET_MTU) ? 1 : 0;
+
+ regval = readl(pdata->mac_regs + MAC_RCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RCR_JE_POS,
+ MAC_RCR_JE_LEN, val);
+ writel(regval, pdata->mac_regs + MAC_RCR);
+}
+
+static void xlgmac_config_checksum_offload(struct xlgmac_pdata *pdata)
+{
+ if (pdata->netdev->features & NETIF_F_RXCSUM)
+ xlgmac_enable_rx_csum(pdata);
+ else
+ xlgmac_disable_rx_csum(pdata);
+}
+
+static void xlgmac_config_vlan_support(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = readl(pdata->mac_regs + MAC_VLANIR);
+ /* Indicate that VLAN Tx CTAGs come from context descriptors */
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_VLANIR_CSVL_POS,
+ MAC_VLANIR_CSVL_LEN, 0);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_VLANIR_VLTI_POS,
+ MAC_VLANIR_VLTI_LEN, 1);
+ writel(regval, pdata->mac_regs + MAC_VLANIR);
+
+ /* Set the current VLAN Hash Table register value */
+ xlgmac_update_vlan_hash_table(pdata);
+
+ if (pdata->netdev->features & NETIF_F_HW_VLAN_CTAG_FILTER)
+ xlgmac_enable_rx_vlan_filtering(pdata);
+ else
+ xlgmac_disable_rx_vlan_filtering(pdata);
+
+ if (pdata->netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
+ xlgmac_enable_rx_vlan_stripping(pdata);
+ else
+ xlgmac_disable_rx_vlan_stripping(pdata);
+}
+
+static int xlgmac_config_rx_mode(struct xlgmac_pdata *pdata)
+{
+ struct net_device *netdev = pdata->netdev;
+ unsigned int pr_mode, am_mode;
+
+ pr_mode = ((netdev->flags & IFF_PROMISC) != 0);
+ am_mode = ((netdev->flags & IFF_ALLMULTI) != 0);
+
+ xlgmac_set_promiscuous_mode(pdata, pr_mode);
+ xlgmac_set_all_multicast_mode(pdata, am_mode);
+
+ xlgmac_add_mac_addresses(pdata);
+
+ return 0;
+}
+
+static void xlgmac_prepare_tx_stop(struct xlgmac_pdata *pdata,
+ struct xlgmac_channel *channel)
+{
+ unsigned int tx_dsr, tx_pos, tx_qidx;
+ unsigned long tx_timeout;
+ unsigned int tx_status;
+
+ /* Calculate the status register to read and the position within */
+ if (channel->queue_index < DMA_DSRX_FIRST_QUEUE) {
+ tx_dsr = DMA_DSR0;
+ tx_pos = (channel->queue_index * DMA_DSR_Q_LEN) +
+ DMA_DSR0_TPS_START;
+ } else {
+ tx_qidx = channel->queue_index - DMA_DSRX_FIRST_QUEUE;
+
+ tx_dsr = DMA_DSR1 + ((tx_qidx / DMA_DSRX_QPR) * DMA_DSRX_INC);
+ tx_pos = ((tx_qidx % DMA_DSRX_QPR) * DMA_DSR_Q_LEN) +
+ DMA_DSRX_TPS_START;
+ }
+
+ /* The Tx engine cannot be stopped if it is actively processing
+ * descriptors. Wait for the Tx engine to enter the stopped or
+ * suspended state. Don't wait forever though...
+ */
+ tx_timeout = jiffies + (XLGMAC_DMA_STOP_TIMEOUT * HZ);
+ while (time_before(jiffies, tx_timeout)) {
+ tx_status = readl(pdata->mac_regs + tx_dsr);
+ tx_status = XLGMAC_GET_REG_BITS(tx_status, tx_pos,
+ DMA_DSR_TPS_LEN);
+ if ((tx_status == DMA_TPS_STOPPED) ||
+ (tx_status == DMA_TPS_SUSPENDED))
+ break;
+
+ usleep_range(500, 1000);
+ }
+
+ if (!time_before(jiffies, tx_timeout))
+ netdev_info(pdata->netdev,
+ "timed out waiting for Tx DMA channel %u to stop\n",
+ channel->queue_index);
+}
+
+static void xlgmac_enable_tx(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+ u32 regval;
+
+ /* Enable each Tx DMA channel */
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (!channel->tx_ring)
+ break;
+
+ regval = readl(XLGMAC_DMA_REG(channel, DMA_CH_TCR));
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_CH_TCR_ST_POS,
+ DMA_CH_TCR_ST_LEN, 1);
+ writel(regval, XLGMAC_DMA_REG(channel, DMA_CH_TCR));
+ }
+
+ /* Enable each Tx queue */
+ for (i = 0; i < pdata->tx_q_count; i++) {
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_TQOMR));
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_Q_TQOMR_TXQEN_POS,
+ MTL_Q_TQOMR_TXQEN_LEN,
+ MTL_Q_ENABLED);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_Q_TQOMR));
+ }
+
+ /* Enable MAC Tx */
+ regval = readl(pdata->mac_regs + MAC_TCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_TCR_TE_POS,
+ MAC_TCR_TE_LEN, 1);
+ writel(regval, pdata->mac_regs + MAC_TCR);
+}
+
+static void xlgmac_disable_tx(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+ u32 regval;
+
+ /* Prepare for Tx DMA channel stop */
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (!channel->tx_ring)
+ break;
+
+ xlgmac_prepare_tx_stop(pdata, channel);
+ }
+
+ /* Disable MAC Tx */
+ regval = readl(pdata->mac_regs + MAC_TCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_TCR_TE_POS,
+ MAC_TCR_TE_LEN, 0);
+ writel(regval, pdata->mac_regs + MAC_TCR);
+
+ /* Disable each Tx queue */
+ for (i = 0; i < pdata->tx_q_count; i++) {
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_TQOMR));
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_Q_TQOMR_TXQEN_POS,
+ MTL_Q_TQOMR_TXQEN_LEN, 0);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_Q_TQOMR));
+ }
+
+ /* Disable each Tx DMA channel */
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (!channel->tx_ring)
+ break;
+
+ regval = readl(XLGMAC_DMA_REG(channel, DMA_CH_TCR));
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_CH_TCR_ST_POS,
+ DMA_CH_TCR_ST_LEN, 0);
+ writel(regval, XLGMAC_DMA_REG(channel, DMA_CH_TCR));
+ }
+}
+
+static void xlgmac_prepare_rx_stop(struct xlgmac_pdata *pdata,
+ unsigned int queue)
+{
+ unsigned int rx_status, prxq, rxqsts;
+ unsigned long rx_timeout;
+
+ /* The Rx engine cannot be stopped if it is actively processing
+ * packets. Wait for the Rx queue to empty the Rx fifo. Don't
+ * wait forever though...
+ */
+ rx_timeout = jiffies + (XLGMAC_DMA_STOP_TIMEOUT * HZ);
+ while (time_before(jiffies, rx_timeout)) {
+ rx_status = readl(XLGMAC_MTL_REG(pdata, queue, MTL_Q_RQDR));
+ prxq = XLGMAC_GET_REG_BITS(rx_status, MTL_Q_RQDR_PRXQ_POS,
+ MTL_Q_RQDR_PRXQ_LEN);
+ rxqsts = XLGMAC_GET_REG_BITS(rx_status, MTL_Q_RQDR_RXQSTS_POS,
+ MTL_Q_RQDR_RXQSTS_LEN);
+ if ((prxq == 0) && (rxqsts == 0))
+ break;
+
+ usleep_range(500, 1000);
+ }
+
+ if (!time_before(jiffies, rx_timeout))
+ netdev_info(pdata->netdev,
+ "timed out waiting for Rx queue %u to empty\n",
+ queue);
+}
+
+static void xlgmac_enable_rx(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int regval, i;
+
+ /* Enable each Rx DMA channel */
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (!channel->rx_ring)
+ break;
+
+ regval = readl(XLGMAC_DMA_REG(channel, DMA_CH_RCR));
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_CH_RCR_SR_POS,
+ DMA_CH_RCR_SR_LEN, 1);
+ writel(regval, XLGMAC_DMA_REG(channel, DMA_CH_RCR));
+ }
+
+ /* Enable each Rx queue */
+ regval = 0;
+ for (i = 0; i < pdata->rx_q_count; i++)
+ regval |= (0x02 << (i << 1));
+ writel(regval, pdata->mac_regs + MAC_RQC0R);
+
+ /* Enable MAC Rx */
+ regval = readl(pdata->mac_regs + MAC_RCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RCR_DCRCC_POS,
+ MAC_RCR_DCRCC_LEN, 1);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RCR_CST_POS,
+ MAC_RCR_CST_LEN, 1);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RCR_ACS_POS,
+ MAC_RCR_ACS_LEN, 1);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RCR_RE_POS,
+ MAC_RCR_RE_LEN, 1);
+ writel(regval, pdata->mac_regs + MAC_RCR);
+}
+
+static void xlgmac_disable_rx(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+ u32 regval;
+
+ /* Disable MAC Rx */
+ regval = readl(pdata->mac_regs + MAC_RCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RCR_DCRCC_POS,
+ MAC_RCR_DCRCC_LEN, 0);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RCR_CST_POS,
+ MAC_RCR_CST_LEN, 0);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RCR_ACS_POS,
+ MAC_RCR_ACS_LEN, 0);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RCR_RE_POS,
+ MAC_RCR_RE_LEN, 0);
+ writel(regval, pdata->mac_regs + MAC_RCR);
+
+ /* Prepare for Rx DMA channel stop */
+ for (i = 0; i < pdata->rx_q_count; i++)
+ xlgmac_prepare_rx_stop(pdata, i);
+
+ /* Disable each Rx queue */
+ writel(0, pdata->mac_regs + MAC_RQC0R);
+
+ /* Disable each Rx DMA channel */
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (!channel->rx_ring)
+ break;
+
+ regval = readl(XLGMAC_DMA_REG(channel, DMA_CH_RCR));
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_CH_RCR_SR_POS,
+ DMA_CH_RCR_SR_LEN, 0);
+ writel(regval, XLGMAC_DMA_REG(channel, DMA_CH_RCR));
+ }
+}
+
+static void xlgmac_tx_start_xmit(struct xlgmac_channel *channel,
+ struct xlgmac_ring *ring)
+{
+ struct xlgmac_pdata *pdata = channel->pdata;
+ struct xlgmac_desc_data *desc_data;
+
+ /* Make sure everything is written before the register write */
+ wmb();
+
+ /* Issue a poll command to Tx DMA by writing address
+ * of next immediate free descriptor
+ */
+ desc_data = XLGMAC_GET_DESC_DATA(ring, ring->cur);
+ writel(lower_32_bits(desc_data->dma_desc_addr),
+ XLGMAC_DMA_REG(channel, DMA_CH_TDTR_LO));
+
+ /* Start the Tx timer */
+ if (pdata->tx_usecs && !channel->tx_timer_active) {
+ channel->tx_timer_active = 1;
+ mod_timer(&channel->tx_timer,
+ jiffies + usecs_to_jiffies(pdata->tx_usecs));
+ }
+
+ ring->tx.xmit_more = 0;
+}
+
+static void xlgmac_dev_xmit(struct xlgmac_channel *channel)
+{
+ struct xlgmac_pdata *pdata = channel->pdata;
+ struct xlgmac_ring *ring = channel->tx_ring;
+ unsigned int tso_context, vlan_context;
+ struct xlgmac_desc_data *desc_data;
+ struct xlgmac_dma_desc *dma_desc;
+ struct xlgmac_pkt_info *pkt_info;
+ unsigned int csum, tso, vlan;
+ int start_index = ring->cur;
+ int cur_index = ring->cur;
+ unsigned int tx_set_ic;
+ int i;
+
+ pkt_info = &ring->pkt_info;
+ csum = XLGMAC_GET_REG_BITS(pkt_info->attributes,
+ TX_PACKET_ATTRIBUTES_CSUM_ENABLE_POS,
+ TX_PACKET_ATTRIBUTES_CSUM_ENABLE_LEN);
+ tso = XLGMAC_GET_REG_BITS(pkt_info->attributes,
+ TX_PACKET_ATTRIBUTES_TSO_ENABLE_POS,
+ TX_PACKET_ATTRIBUTES_TSO_ENABLE_LEN);
+ vlan = XLGMAC_GET_REG_BITS(pkt_info->attributes,
+ TX_PACKET_ATTRIBUTES_VLAN_CTAG_POS,
+ TX_PACKET_ATTRIBUTES_VLAN_CTAG_LEN);
+
+ if (tso && (pkt_info->mss != ring->tx.cur_mss))
+ tso_context = 1;
+ else
+ tso_context = 0;
+
+ if (vlan && (pkt_info->vlan_ctag != ring->tx.cur_vlan_ctag))
+ vlan_context = 1;
+ else
+ vlan_context = 0;
+
+ /* Determine if an interrupt should be generated for this Tx:
+ * Interrupt:
+ * - Tx frame count exceeds the frame count setting
+ * - Addition of Tx frame count to the frame count since the
+ * last interrupt was set exceeds the frame count setting
+ * No interrupt:
+ * - No frame count setting specified (ethtool -C ethX tx-frames 0)
+ * - Addition of Tx frame count to the frame count since the
+ * last interrupt was set does not exceed the frame count setting
+ */
+ ring->coalesce_count += pkt_info->tx_packets;
+ if (!pdata->tx_frames)
+ tx_set_ic = 0;
+ else if (pkt_info->tx_packets > pdata->tx_frames)
+ tx_set_ic = 1;
+ else if ((ring->coalesce_count % pdata->tx_frames) <
+ pkt_info->tx_packets)
+ tx_set_ic = 1;
+ else
+ tx_set_ic = 0;
+
+ desc_data = XLGMAC_GET_DESC_DATA(ring, cur_index);
+ dma_desc = desc_data->dma_desc;
+
+ /* Create a context descriptor if this is a TSO pkt_info */
+ if (tso_context || vlan_context) {
+ if (tso_context) {
+ netif_dbg(pdata, tx_queued, pdata->netdev,
+ "TSO context descriptor, mss=%u\n",
+ pkt_info->mss);
+
+ /* Set the MSS size */
+ dma_desc->desc2 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc2,
+ TX_CONTEXT_DESC2_MSS_POS,
+ TX_CONTEXT_DESC2_MSS_LEN,
+ pkt_info->mss);
+
+ /* Mark it as a CONTEXT descriptor */
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_CONTEXT_DESC3_CTXT_POS,
+ TX_CONTEXT_DESC3_CTXT_LEN,
+ 1);
+
+ /* Indicate this descriptor contains the MSS */
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_CONTEXT_DESC3_TCMSSV_POS,
+ TX_CONTEXT_DESC3_TCMSSV_LEN,
+ 1);
+
+ ring->tx.cur_mss = pkt_info->mss;
+ }
+
+ if (vlan_context) {
+ netif_dbg(pdata, tx_queued, pdata->netdev,
+ "VLAN context descriptor, ctag=%u\n",
+ pkt_info->vlan_ctag);
+
+ /* Mark it as a CONTEXT descriptor */
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_CONTEXT_DESC3_CTXT_POS,
+ TX_CONTEXT_DESC3_CTXT_LEN,
+ 1);
+
+ /* Set the VLAN tag */
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_CONTEXT_DESC3_VT_POS,
+ TX_CONTEXT_DESC3_VT_LEN,
+ pkt_info->vlan_ctag);
+
+ /* Indicate this descriptor contains the VLAN tag */
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_CONTEXT_DESC3_VLTV_POS,
+ TX_CONTEXT_DESC3_VLTV_LEN,
+ 1);
+
+ ring->tx.cur_vlan_ctag = pkt_info->vlan_ctag;
+ }
+
+ cur_index++;
+ desc_data = XLGMAC_GET_DESC_DATA(ring, cur_index);
+ dma_desc = desc_data->dma_desc;
+ }
+
+ /* Update buffer address (for TSO this is the header) */
+ dma_desc->desc0 = cpu_to_le32(lower_32_bits(desc_data->skb_dma));
+ dma_desc->desc1 = cpu_to_le32(upper_32_bits(desc_data->skb_dma));
+
+ /* Update the buffer length */
+ dma_desc->desc2 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc2,
+ TX_NORMAL_DESC2_HL_B1L_POS,
+ TX_NORMAL_DESC2_HL_B1L_LEN,
+ desc_data->skb_dma_len);
+
+ /* VLAN tag insertion check */
+ if (vlan)
+ dma_desc->desc2 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc2,
+ TX_NORMAL_DESC2_VTIR_POS,
+ TX_NORMAL_DESC2_VTIR_LEN,
+ TX_NORMAL_DESC2_VLAN_INSERT);
+
+ /* Timestamp enablement check */
+ if (XLGMAC_GET_REG_BITS(pkt_info->attributes,
+ TX_PACKET_ATTRIBUTES_PTP_POS,
+ TX_PACKET_ATTRIBUTES_PTP_LEN))
+ dma_desc->desc2 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc2,
+ TX_NORMAL_DESC2_TTSE_POS,
+ TX_NORMAL_DESC2_TTSE_LEN,
+ 1);
+
+ /* Mark it as First Descriptor */
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_NORMAL_DESC3_FD_POS,
+ TX_NORMAL_DESC3_FD_LEN,
+ 1);
+
+ /* Mark it as a NORMAL descriptor */
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_NORMAL_DESC3_CTXT_POS,
+ TX_NORMAL_DESC3_CTXT_LEN,
+ 0);
+
+ /* Set OWN bit if not the first descriptor */
+ if (cur_index != start_index)
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_NORMAL_DESC3_OWN_POS,
+ TX_NORMAL_DESC3_OWN_LEN,
+ 1);
+
+ if (tso) {
+ /* Enable TSO */
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_NORMAL_DESC3_TSE_POS,
+ TX_NORMAL_DESC3_TSE_LEN, 1);
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_NORMAL_DESC3_TCPPL_POS,
+ TX_NORMAL_DESC3_TCPPL_LEN,
+ pkt_info->tcp_payload_len);
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_NORMAL_DESC3_TCPHDRLEN_POS,
+ TX_NORMAL_DESC3_TCPHDRLEN_LEN,
+ pkt_info->tcp_header_len / 4);
+
+ pdata->stats.tx_tso_packets++;
+ } else {
+ /* Enable CRC and Pad Insertion */
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_NORMAL_DESC3_CPC_POS,
+ TX_NORMAL_DESC3_CPC_LEN, 0);
+
+ /* Enable HW CSUM */
+ if (csum)
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_NORMAL_DESC3_CIC_POS,
+ TX_NORMAL_DESC3_CIC_LEN,
+ 0x3);
+
+ /* Set the total length to be transmitted */
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_NORMAL_DESC3_FL_POS,
+ TX_NORMAL_DESC3_FL_LEN,
+ pkt_info->length);
+ }
+
+ for (i = cur_index - start_index + 1; i < pkt_info->desc_count; i++) {
+ cur_index++;
+ desc_data = XLGMAC_GET_DESC_DATA(ring, cur_index);
+ dma_desc = desc_data->dma_desc;
+
+ /* Update buffer address */
+ dma_desc->desc0 =
+ cpu_to_le32(lower_32_bits(desc_data->skb_dma));
+ dma_desc->desc1 =
+ cpu_to_le32(upper_32_bits(desc_data->skb_dma));
+
+ /* Update the buffer length */
+ dma_desc->desc2 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc2,
+ TX_NORMAL_DESC2_HL_B1L_POS,
+ TX_NORMAL_DESC2_HL_B1L_LEN,
+ desc_data->skb_dma_len);
+
+ /* Set OWN bit */
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_NORMAL_DESC3_OWN_POS,
+ TX_NORMAL_DESC3_OWN_LEN, 1);
+
+ /* Mark it as NORMAL descriptor */
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_NORMAL_DESC3_CTXT_POS,
+ TX_NORMAL_DESC3_CTXT_LEN, 0);
+
+ /* Enable HW CSUM */
+ if (csum)
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_NORMAL_DESC3_CIC_POS,
+ TX_NORMAL_DESC3_CIC_LEN,
+ 0x3);
+ }
+
+ /* Set LAST bit for the last descriptor */
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_NORMAL_DESC3_LD_POS,
+ TX_NORMAL_DESC3_LD_LEN, 1);
+
+ /* Set IC bit based on Tx coalescing settings */
+ if (tx_set_ic)
+ dma_desc->desc2 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc2,
+ TX_NORMAL_DESC2_IC_POS,
+ TX_NORMAL_DESC2_IC_LEN, 1);
+
+ /* Save the Tx info to report back during cleanup */
+ desc_data->tx.packets = pkt_info->tx_packets;
+ desc_data->tx.bytes = pkt_info->tx_bytes;
+
+ /* In case the Tx DMA engine is running, make sure everything
+ * is written to the descriptor(s) before setting the OWN bit
+ * for the first descriptor
+ */
+ dma_wmb();
+
+ /* Set OWN bit for the first descriptor */
+ desc_data = XLGMAC_GET_DESC_DATA(ring, start_index);
+ dma_desc = desc_data->dma_desc;
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ TX_NORMAL_DESC3_OWN_POS,
+ TX_NORMAL_DESC3_OWN_LEN, 1);
+
+ if (netif_msg_tx_queued(pdata))
+ xlgmac_dump_tx_desc(pdata, ring, start_index,
+ pkt_info->desc_count, 1);
+
+ /* Make sure ownership is written to the descriptor */
+ smp_wmb();
+
+ ring->cur = cur_index + 1;
+ if (!pkt_info->skb->xmit_more ||
+ netif_xmit_stopped(netdev_get_tx_queue(pdata->netdev,
+ channel->queue_index)))
+ xlgmac_tx_start_xmit(channel, ring);
+ else
+ ring->tx.xmit_more = 1;
+
+ XLGMAC_PR("%s: descriptors %u to %u written\n",
+ channel->name, start_index & (ring->dma_desc_count - 1),
+ (ring->cur - 1) & (ring->dma_desc_count - 1));
+}
+
+static void xlgmac_get_rx_tstamp(struct xlgmac_pkt_info *pkt_info,
+ struct xlgmac_dma_desc *dma_desc)
+{
+ u32 tsa, tsd;
+ u64 nsec;
+
+ tsa = XLGMAC_GET_REG_BITS_LE(dma_desc->desc3,
+ RX_CONTEXT_DESC3_TSA_POS,
+ RX_CONTEXT_DESC3_TSA_LEN);
+ tsd = XLGMAC_GET_REG_BITS_LE(dma_desc->desc3,
+ RX_CONTEXT_DESC3_TSD_POS,
+ RX_CONTEXT_DESC3_TSD_LEN);
+ if (tsa && !tsd) {
+ nsec = le32_to_cpu(dma_desc->desc1);
+ nsec <<= 32;
+ nsec |= le32_to_cpu(dma_desc->desc0);
+ if (nsec != 0xffffffffffffffffULL) {
+ pkt_info->rx_tstamp = nsec;
+ pkt_info->attributes = XLGMAC_SET_REG_BITS(
+ pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_RX_TSTAMP_POS,
+ RX_PACKET_ATTRIBUTES_RX_TSTAMP_LEN,
+ 1);
+ }
+ }
+}
+
+static void xlgmac_tx_desc_reset(struct xlgmac_desc_data *desc_data)
+{
+ struct xlgmac_dma_desc *dma_desc = desc_data->dma_desc;
+
+ /* Reset the Tx descriptor
+ * Set buffer 1 (lo) address to zero
+ * Set buffer 1 (hi) address to zero
+ * Reset all other control bits (IC, TTSE, B2L & B1L)
+ * Reset all other control bits (OWN, CTXT, FD, LD, CPC, CIC, etc)
+ */
+ dma_desc->desc0 = 0;
+ dma_desc->desc1 = 0;
+ dma_desc->desc2 = 0;
+ dma_desc->desc3 = 0;
+
+ /* Make sure ownership is written to the descriptor */
+ dma_wmb();
+}
+
+static void xlgmac_tx_desc_init(struct xlgmac_channel *channel)
+{
+ struct xlgmac_ring *ring = channel->tx_ring;
+ struct xlgmac_desc_data *desc_data;
+ int start_index = ring->cur;
+ int i;
+
+ /* Initialze all descriptors */
+ for (i = 0; i < ring->dma_desc_count; i++) {
+ desc_data = XLGMAC_GET_DESC_DATA(ring, i);
+
+ /* Initialize Tx descriptor */
+ xlgmac_tx_desc_reset(desc_data);
+ }
+
+ /* Update the total number of Tx descriptors */
+ writel(ring->dma_desc_count - 1, XLGMAC_DMA_REG(channel, DMA_CH_TDRLR));
+
+ /* Update the starting address of descriptor ring */
+ desc_data = XLGMAC_GET_DESC_DATA(ring, start_index);
+ writel(upper_32_bits(desc_data->dma_desc_addr),
+ XLGMAC_DMA_REG(channel, DMA_CH_TDLR_HI));
+ writel(lower_32_bits(desc_data->dma_desc_addr),
+ XLGMAC_DMA_REG(channel, DMA_CH_TDLR_LO));
+}
+
+static void xlgmac_rx_desc_reset(struct xlgmac_pdata *pdata,
+ struct xlgmac_desc_data *desc_data,
+ unsigned int index)
+{
+ struct xlgmac_dma_desc *dma_desc = desc_data->dma_desc;
+ unsigned int rx_frames = pdata->rx_frames;
+ unsigned int rx_usecs = pdata->rx_usecs;
+ dma_addr_t hdr_dma, buf_dma;
+ unsigned int inte;
+
+ if (!rx_usecs && !rx_frames) {
+ /* No coalescing, interrupt for every descriptor */
+ inte = 1;
+ } else {
+ /* Set interrupt based on Rx frame coalescing setting */
+ if (rx_frames && !((index + 1) % rx_frames))
+ inte = 1;
+ else
+ inte = 0;
+ }
+
+ /* Reset the Rx descriptor
+ * Set buffer 1 (lo) address to header dma address (lo)
+ * Set buffer 1 (hi) address to header dma address (hi)
+ * Set buffer 2 (lo) address to buffer dma address (lo)
+ * Set buffer 2 (hi) address to buffer dma address (hi) and
+ * set control bits OWN and INTE
+ */
+ hdr_dma = desc_data->rx.hdr.dma_base + desc_data->rx.hdr.dma_off;
+ buf_dma = desc_data->rx.buf.dma_base + desc_data->rx.buf.dma_off;
+ dma_desc->desc0 = cpu_to_le32(lower_32_bits(hdr_dma));
+ dma_desc->desc1 = cpu_to_le32(upper_32_bits(hdr_dma));
+ dma_desc->desc2 = cpu_to_le32(lower_32_bits(buf_dma));
+ dma_desc->desc3 = cpu_to_le32(upper_32_bits(buf_dma));
+
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ RX_NORMAL_DESC3_INTE_POS,
+ RX_NORMAL_DESC3_INTE_LEN,
+ inte);
+
+ /* Since the Rx DMA engine is likely running, make sure everything
+ * is written to the descriptor(s) before setting the OWN bit
+ * for the descriptor
+ */
+ dma_wmb();
+
+ dma_desc->desc3 = XLGMAC_SET_REG_BITS_LE(
+ dma_desc->desc3,
+ RX_NORMAL_DESC3_OWN_POS,
+ RX_NORMAL_DESC3_OWN_LEN,
+ 1);
+
+ /* Make sure ownership is written to the descriptor */
+ dma_wmb();
+}
+
+static void xlgmac_rx_desc_init(struct xlgmac_channel *channel)
+{
+ struct xlgmac_pdata *pdata = channel->pdata;
+ struct xlgmac_ring *ring = channel->rx_ring;
+ unsigned int start_index = ring->cur;
+ struct xlgmac_desc_data *desc_data;
+ unsigned int i;
+
+ /* Initialize all descriptors */
+ for (i = 0; i < ring->dma_desc_count; i++) {
+ desc_data = XLGMAC_GET_DESC_DATA(ring, i);
+
+ /* Initialize Rx descriptor */
+ xlgmac_rx_desc_reset(pdata, desc_data, i);
+ }
+
+ /* Update the total number of Rx descriptors */
+ writel(ring->dma_desc_count - 1, XLGMAC_DMA_REG(channel, DMA_CH_RDRLR));
+
+ /* Update the starting address of descriptor ring */
+ desc_data = XLGMAC_GET_DESC_DATA(ring, start_index);
+ writel(upper_32_bits(desc_data->dma_desc_addr),
+ XLGMAC_DMA_REG(channel, DMA_CH_RDLR_HI));
+ writel(lower_32_bits(desc_data->dma_desc_addr),
+ XLGMAC_DMA_REG(channel, DMA_CH_RDLR_LO));
+
+ /* Update the Rx Descriptor Tail Pointer */
+ desc_data = XLGMAC_GET_DESC_DATA(ring, start_index +
+ ring->dma_desc_count - 1);
+ writel(lower_32_bits(desc_data->dma_desc_addr),
+ XLGMAC_DMA_REG(channel, DMA_CH_RDTR_LO));
+}
+
+static int xlgmac_is_context_desc(struct xlgmac_dma_desc *dma_desc)
+{
+ /* Rx and Tx share CTXT bit, so check TDES3.CTXT bit */
+ return XLGMAC_GET_REG_BITS_LE(dma_desc->desc3,
+ TX_NORMAL_DESC3_CTXT_POS,
+ TX_NORMAL_DESC3_CTXT_LEN);
+}
+
+static int xlgmac_is_last_desc(struct xlgmac_dma_desc *dma_desc)
+{
+ /* Rx and Tx share LD bit, so check TDES3.LD bit */
+ return XLGMAC_GET_REG_BITS_LE(dma_desc->desc3,
+ TX_NORMAL_DESC3_LD_POS,
+ TX_NORMAL_DESC3_LD_LEN);
+}
+
+static int xlgmac_disable_tx_flow_control(struct xlgmac_pdata *pdata)
+{
+ unsigned int max_q_count, q_count;
+ unsigned int reg, regval;
+ unsigned int i;
+
+ /* Clear MTL flow control */
+ for (i = 0; i < pdata->rx_q_count; i++) {
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_RQOMR));
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_Q_RQOMR_EHFC_POS,
+ MTL_Q_RQOMR_EHFC_LEN, 0);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_Q_RQOMR));
+ }
+
+ /* Clear MAC flow control */
+ max_q_count = XLGMAC_MAX_FLOW_CONTROL_QUEUES;
+ q_count = min_t(unsigned int, pdata->tx_q_count, max_q_count);
+ reg = MAC_Q0TFCR;
+ for (i = 0; i < q_count; i++) {
+ regval = readl(pdata->mac_regs + reg);
+ regval = XLGMAC_SET_REG_BITS(regval,
+ MAC_Q0TFCR_TFE_POS,
+ MAC_Q0TFCR_TFE_LEN,
+ 0);
+ writel(regval, pdata->mac_regs + reg);
+
+ reg += MAC_QTFCR_INC;
+ }
+
+ return 0;
+}
+
+static int xlgmac_enable_tx_flow_control(struct xlgmac_pdata *pdata)
+{
+ unsigned int max_q_count, q_count;
+ unsigned int reg, regval;
+ unsigned int i;
+
+ /* Set MTL flow control */
+ for (i = 0; i < pdata->rx_q_count; i++) {
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_RQOMR));
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_Q_RQOMR_EHFC_POS,
+ MTL_Q_RQOMR_EHFC_LEN, 1);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_Q_RQOMR));
+ }
+
+ /* Set MAC flow control */
+ max_q_count = XLGMAC_MAX_FLOW_CONTROL_QUEUES;
+ q_count = min_t(unsigned int, pdata->tx_q_count, max_q_count);
+ reg = MAC_Q0TFCR;
+ for (i = 0; i < q_count; i++) {
+ regval = readl(pdata->mac_regs + reg);
+
+ /* Enable transmit flow control */
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_Q0TFCR_TFE_POS,
+ MAC_Q0TFCR_TFE_LEN, 1);
+ /* Set pause time */
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_Q0TFCR_PT_POS,
+ MAC_Q0TFCR_PT_LEN, 0xffff);
+
+ writel(regval, pdata->mac_regs + reg);
+
+ reg += MAC_QTFCR_INC;
+ }
+
+ return 0;
+}
+
+static int xlgmac_disable_rx_flow_control(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = readl(pdata->mac_regs + MAC_RFCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RFCR_RFE_POS,
+ MAC_RFCR_RFE_LEN, 0);
+ writel(regval, pdata->mac_regs + MAC_RFCR);
+
+ return 0;
+}
+
+static int xlgmac_enable_rx_flow_control(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = readl(pdata->mac_regs + MAC_RFCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RFCR_RFE_POS,
+ MAC_RFCR_RFE_LEN, 1);
+ writel(regval, pdata->mac_regs + MAC_RFCR);
+
+ return 0;
+}
+
+static int xlgmac_config_tx_flow_control(struct xlgmac_pdata *pdata)
+{
+ if (pdata->tx_pause)
+ xlgmac_enable_tx_flow_control(pdata);
+ else
+ xlgmac_disable_tx_flow_control(pdata);
+
+ return 0;
+}
+
+static int xlgmac_config_rx_flow_control(struct xlgmac_pdata *pdata)
+{
+ if (pdata->rx_pause)
+ xlgmac_enable_rx_flow_control(pdata);
+ else
+ xlgmac_disable_rx_flow_control(pdata);
+
+ return 0;
+}
+
+static int xlgmac_config_rx_coalesce(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+ u32 regval;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (!channel->rx_ring)
+ break;
+
+ regval = readl(XLGMAC_DMA_REG(channel, DMA_CH_RIWT));
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_CH_RIWT_RWT_POS,
+ DMA_CH_RIWT_RWT_LEN,
+ pdata->rx_riwt);
+ writel(regval, XLGMAC_DMA_REG(channel, DMA_CH_RIWT));
+ }
+
+ return 0;
+}
+
+static void xlgmac_config_flow_control(struct xlgmac_pdata *pdata)
+{
+ xlgmac_config_tx_flow_control(pdata);
+ xlgmac_config_rx_flow_control(pdata);
+}
+
+static void xlgmac_config_rx_fep_enable(struct xlgmac_pdata *pdata)
+{
+ unsigned int i;
+ u32 regval;
+
+ for (i = 0; i < pdata->rx_q_count; i++) {
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_RQOMR));
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_Q_RQOMR_FEP_POS,
+ MTL_Q_RQOMR_FEP_LEN, 1);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_Q_RQOMR));
+ }
+}
+
+static void xlgmac_config_rx_fup_enable(struct xlgmac_pdata *pdata)
+{
+ unsigned int i;
+ u32 regval;
+
+ for (i = 0; i < pdata->rx_q_count; i++) {
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_RQOMR));
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_Q_RQOMR_FUP_POS,
+ MTL_Q_RQOMR_FUP_LEN, 1);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_Q_RQOMR));
+ }
+}
+
+static int xlgmac_config_tx_coalesce(struct xlgmac_pdata *pdata)
+{
+ return 0;
+}
+
+static void xlgmac_config_rx_buffer_size(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+ u32 regval;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (!channel->rx_ring)
+ break;
+
+ regval = readl(XLGMAC_DMA_REG(channel, DMA_CH_RCR));
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_CH_RCR_RBSZ_POS,
+ DMA_CH_RCR_RBSZ_LEN,
+ pdata->rx_buf_size);
+ writel(regval, XLGMAC_DMA_REG(channel, DMA_CH_RCR));
+ }
+}
+
+static void xlgmac_config_tso_mode(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+ u32 regval;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (!channel->tx_ring)
+ break;
+
+ if (pdata->hw_feat.tso) {
+ regval = readl(XLGMAC_DMA_REG(channel, DMA_CH_TCR));
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_CH_TCR_TSE_POS,
+ DMA_CH_TCR_TSE_LEN, 1);
+ writel(regval, XLGMAC_DMA_REG(channel, DMA_CH_TCR));
+ }
+ }
+}
+
+static void xlgmac_config_sph_mode(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+ u32 regval;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (!channel->rx_ring)
+ break;
+
+ regval = readl(XLGMAC_DMA_REG(channel, DMA_CH_CR));
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_CH_CR_SPH_POS,
+ DMA_CH_CR_SPH_LEN, 1);
+ writel(regval, XLGMAC_DMA_REG(channel, DMA_CH_CR));
+ }
+
+ regval = readl(pdata->mac_regs + MAC_RCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RCR_HDSMS_POS,
+ MAC_RCR_HDSMS_LEN,
+ XLGMAC_SPH_HDSMS_SIZE);
+ writel(regval, pdata->mac_regs + MAC_RCR);
+}
+
+static unsigned int xlgmac_usec_to_riwt(struct xlgmac_pdata *pdata,
+ unsigned int usec)
+{
+ unsigned long rate;
+ unsigned int ret;
+
+ rate = pdata->sysclk_rate;
+
+ /* Convert the input usec value to the watchdog timer value. Each
+ * watchdog timer value is equivalent to 256 clock cycles.
+ * Calculate the required value as:
+ * ( usec * ( system_clock_mhz / 10^6 ) / 256
+ */
+ ret = (usec * (rate / 1000000)) / 256;
+
+ return ret;
+}
+
+static unsigned int xlgmac_riwt_to_usec(struct xlgmac_pdata *pdata,
+ unsigned int riwt)
+{
+ unsigned long rate;
+ unsigned int ret;
+
+ rate = pdata->sysclk_rate;
+
+ /* Convert the input watchdog timer value to the usec value. Each
+ * watchdog timer value is equivalent to 256 clock cycles.
+ * Calculate the required value as:
+ * ( riwt * 256 ) / ( system_clock_mhz / 10^6 )
+ */
+ ret = (riwt * 256) / (rate / 1000000);
+
+ return ret;
+}
+
+static int xlgmac_config_rx_threshold(struct xlgmac_pdata *pdata,
+ unsigned int val)
+{
+ unsigned int i;
+ u32 regval;
+
+ for (i = 0; i < pdata->rx_q_count; i++) {
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_RQOMR));
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_Q_RQOMR_RTC_POS,
+ MTL_Q_RQOMR_RTC_LEN, val);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_Q_RQOMR));
+ }
+
+ return 0;
+}
+
+static void xlgmac_config_mtl_mode(struct xlgmac_pdata *pdata)
+{
+ unsigned int i;
+ u32 regval;
+
+ /* Set Tx to weighted round robin scheduling algorithm */
+ regval = readl(pdata->mac_regs + MTL_OMR);
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_OMR_ETSALG_POS,
+ MTL_OMR_ETSALG_LEN, MTL_ETSALG_WRR);
+ writel(regval, pdata->mac_regs + MTL_OMR);
+
+ /* Set Tx traffic classes to use WRR algorithm with equal weights */
+ for (i = 0; i < pdata->hw_feat.tc_cnt; i++) {
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_TC_ETSCR));
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_TC_ETSCR_TSA_POS,
+ MTL_TC_ETSCR_TSA_LEN, MTL_TSA_ETS);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_TC_ETSCR));
+
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_TC_QWR));
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_TC_QWR_QW_POS,
+ MTL_TC_QWR_QW_LEN, 1);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_TC_QWR));
+ }
+
+ /* Set Rx to strict priority algorithm */
+ regval = readl(pdata->mac_regs + MTL_OMR);
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_OMR_RAA_POS,
+ MTL_OMR_RAA_LEN, MTL_RAA_SP);
+ writel(regval, pdata->mac_regs + MTL_OMR);
+}
+
+static void xlgmac_config_queue_mapping(struct xlgmac_pdata *pdata)
+{
+ unsigned int ppq, ppq_extra, prio, prio_queues;
+ unsigned int qptc, qptc_extra, queue;
+ unsigned int reg, regval;
+ unsigned int mask;
+ unsigned int i, j;
+
+ /* Map the MTL Tx Queues to Traffic Classes
+ * Note: Tx Queues >= Traffic Classes
+ */
+ qptc = pdata->tx_q_count / pdata->hw_feat.tc_cnt;
+ qptc_extra = pdata->tx_q_count % pdata->hw_feat.tc_cnt;
+
+ for (i = 0, queue = 0; i < pdata->hw_feat.tc_cnt; i++) {
+ for (j = 0; j < qptc; j++) {
+ netif_dbg(pdata, drv, pdata->netdev,
+ "TXq%u mapped to TC%u\n", queue, i);
+ regval = readl(XLGMAC_MTL_REG(pdata, queue,
+ MTL_Q_TQOMR));
+ regval = XLGMAC_SET_REG_BITS(regval,
+ MTL_Q_TQOMR_Q2TCMAP_POS,
+ MTL_Q_TQOMR_Q2TCMAP_LEN,
+ i);
+ writel(regval, XLGMAC_MTL_REG(pdata, queue,
+ MTL_Q_TQOMR));
+ queue++;
+ }
+
+ if (i < qptc_extra) {
+ netif_dbg(pdata, drv, pdata->netdev,
+ "TXq%u mapped to TC%u\n", queue, i);
+ regval = readl(XLGMAC_MTL_REG(pdata, queue,
+ MTL_Q_TQOMR));
+ regval = XLGMAC_SET_REG_BITS(regval,
+ MTL_Q_TQOMR_Q2TCMAP_POS,
+ MTL_Q_TQOMR_Q2TCMAP_LEN,
+ i);
+ writel(regval, XLGMAC_MTL_REG(pdata, queue,
+ MTL_Q_TQOMR));
+ queue++;
+ }
+ }
+
+ /* Map the 8 VLAN priority values to available MTL Rx queues */
+ prio_queues = min_t(unsigned int, IEEE_8021QAZ_MAX_TCS,
+ pdata->rx_q_count);
+ ppq = IEEE_8021QAZ_MAX_TCS / prio_queues;
+ ppq_extra = IEEE_8021QAZ_MAX_TCS % prio_queues;
+
+ reg = MAC_RQC2R;
+ regval = 0;
+ for (i = 0, prio = 0; i < prio_queues;) {
+ mask = 0;
+ for (j = 0; j < ppq; j++) {
+ netif_dbg(pdata, drv, pdata->netdev,
+ "PRIO%u mapped to RXq%u\n", prio, i);
+ mask |= (1 << prio);
+ prio++;
+ }
+
+ if (i < ppq_extra) {
+ netif_dbg(pdata, drv, pdata->netdev,
+ "PRIO%u mapped to RXq%u\n", prio, i);
+ mask |= (1 << prio);
+ prio++;
+ }
+
+ regval |= (mask << ((i++ % MAC_RQC2_Q_PER_REG) << 3));
+
+ if ((i % MAC_RQC2_Q_PER_REG) && (i != prio_queues))
+ continue;
+
+ writel(regval, pdata->mac_regs + reg);
+ reg += MAC_RQC2_INC;
+ regval = 0;
+ }
+
+ /* Configure one to one, MTL Rx queue to DMA Rx channel mapping
+ * ie Q0 <--> CH0, Q1 <--> CH1 ... Q11 <--> CH11
+ */
+ reg = MTL_RQDCM0R;
+ regval = readl(pdata->mac_regs + reg);
+ regval |= (MTL_RQDCM0R_Q0MDMACH | MTL_RQDCM0R_Q1MDMACH |
+ MTL_RQDCM0R_Q2MDMACH | MTL_RQDCM0R_Q3MDMACH);
+ writel(regval, pdata->mac_regs + reg);
+
+ reg += MTL_RQDCM_INC;
+ regval = readl(pdata->mac_regs + reg);
+ regval |= (MTL_RQDCM1R_Q4MDMACH | MTL_RQDCM1R_Q5MDMACH |
+ MTL_RQDCM1R_Q6MDMACH | MTL_RQDCM1R_Q7MDMACH);
+ writel(regval, pdata->mac_regs + reg);
+
+ reg += MTL_RQDCM_INC;
+ regval = readl(pdata->mac_regs + reg);
+ regval |= (MTL_RQDCM2R_Q8MDMACH | MTL_RQDCM2R_Q9MDMACH |
+ MTL_RQDCM2R_Q10MDMACH | MTL_RQDCM2R_Q11MDMACH);
+ writel(regval, pdata->mac_regs + reg);
+}
+
+static unsigned int xlgmac_calculate_per_queue_fifo(
+ unsigned int fifo_size,
+ unsigned int queue_count)
+{
+ unsigned int q_fifo_size;
+ unsigned int p_fifo;
+
+ /* Calculate the configured fifo size */
+ q_fifo_size = 1 << (fifo_size + 7);
+
+ /* The configured value may not be the actual amount of fifo RAM */
+ q_fifo_size = min_t(unsigned int, XLGMAC_MAX_FIFO, q_fifo_size);
+
+ q_fifo_size = q_fifo_size / queue_count;
+
+ /* Each increment in the queue fifo size represents 256 bytes of
+ * fifo, with 0 representing 256 bytes. Distribute the fifo equally
+ * between the queues.
+ */
+ p_fifo = q_fifo_size / 256;
+ if (p_fifo)
+ p_fifo--;
+
+ return p_fifo;
+}
+
+static void xlgmac_config_tx_fifo_size(struct xlgmac_pdata *pdata)
+{
+ unsigned int fifo_size;
+ unsigned int i;
+ u32 regval;
+
+ fifo_size = xlgmac_calculate_per_queue_fifo(
+ pdata->hw_feat.tx_fifo_size,
+ pdata->tx_q_count);
+
+ for (i = 0; i < pdata->tx_q_count; i++) {
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_TQOMR));
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_Q_TQOMR_TQS_POS,
+ MTL_Q_TQOMR_TQS_LEN, fifo_size);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_Q_TQOMR));
+ }
+
+ netif_info(pdata, drv, pdata->netdev,
+ "%d Tx hardware queues, %d byte fifo per queue\n",
+ pdata->tx_q_count, ((fifo_size + 1) * 256));
+}
+
+static void xlgmac_config_rx_fifo_size(struct xlgmac_pdata *pdata)
+{
+ unsigned int fifo_size;
+ unsigned int i;
+ u32 regval;
+
+ fifo_size = xlgmac_calculate_per_queue_fifo(
+ pdata->hw_feat.rx_fifo_size,
+ pdata->rx_q_count);
+
+ for (i = 0; i < pdata->rx_q_count; i++) {
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_RQOMR));
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_Q_RQOMR_RQS_POS,
+ MTL_Q_RQOMR_RQS_LEN, fifo_size);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_Q_RQOMR));
+ }
+
+ netif_info(pdata, drv, pdata->netdev,
+ "%d Rx hardware queues, %d byte fifo per queue\n",
+ pdata->rx_q_count, ((fifo_size + 1) * 256));
+}
+
+static void xlgmac_config_flow_control_threshold(struct xlgmac_pdata *pdata)
+{
+ unsigned int i;
+ u32 regval;
+
+ for (i = 0; i < pdata->rx_q_count; i++) {
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_RQFCR));
+ /* Activate flow control when less than 4k left in fifo */
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_Q_RQFCR_RFA_POS,
+ MTL_Q_RQFCR_RFA_LEN, 2);
+ /* De-activate flow control when more than 6k left in fifo */
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_Q_RQFCR_RFD_POS,
+ MTL_Q_RQFCR_RFD_LEN, 4);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_Q_RQFCR));
+ }
+}
+
+static int xlgmac_config_tx_threshold(struct xlgmac_pdata *pdata,
+ unsigned int val)
+{
+ unsigned int i;
+ u32 regval;
+
+ for (i = 0; i < pdata->tx_q_count; i++) {
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_TQOMR));
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_Q_TQOMR_TTC_POS,
+ MTL_Q_TQOMR_TTC_LEN, val);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_Q_TQOMR));
+ }
+
+ return 0;
+}
+
+static int xlgmac_config_rsf_mode(struct xlgmac_pdata *pdata,
+ unsigned int val)
+{
+ unsigned int i;
+ u32 regval;
+
+ for (i = 0; i < pdata->rx_q_count; i++) {
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_RQOMR));
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_Q_RQOMR_RSF_POS,
+ MTL_Q_RQOMR_RSF_LEN, val);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_Q_RQOMR));
+ }
+
+ return 0;
+}
+
+static int xlgmac_config_tsf_mode(struct xlgmac_pdata *pdata,
+ unsigned int val)
+{
+ unsigned int i;
+ u32 regval;
+
+ for (i = 0; i < pdata->tx_q_count; i++) {
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_TQOMR));
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_Q_TQOMR_TSF_POS,
+ MTL_Q_TQOMR_TSF_LEN, val);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_Q_TQOMR));
+ }
+
+ return 0;
+}
+
+static int xlgmac_config_osp_mode(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+ u32 regval;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (!channel->tx_ring)
+ break;
+
+ regval = readl(XLGMAC_DMA_REG(channel, DMA_CH_TCR));
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_CH_TCR_OSP_POS,
+ DMA_CH_TCR_OSP_LEN,
+ pdata->tx_osp_mode);
+ writel(regval, XLGMAC_DMA_REG(channel, DMA_CH_TCR));
+ }
+
+ return 0;
+}
+
+static int xlgmac_config_pblx8(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+ u32 regval;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ regval = readl(XLGMAC_DMA_REG(channel, DMA_CH_CR));
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_CH_CR_PBLX8_POS,
+ DMA_CH_CR_PBLX8_LEN,
+ pdata->pblx8);
+ writel(regval, XLGMAC_DMA_REG(channel, DMA_CH_CR));
+ }
+
+ return 0;
+}
+
+static int xlgmac_get_tx_pbl_val(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = readl(XLGMAC_DMA_REG(pdata->channel_head, DMA_CH_TCR));
+ regval = XLGMAC_GET_REG_BITS(regval, DMA_CH_TCR_PBL_POS,
+ DMA_CH_TCR_PBL_LEN);
+ return regval;
+}
+
+static int xlgmac_config_tx_pbl_val(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+ u32 regval;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (!channel->tx_ring)
+ break;
+
+ regval = readl(XLGMAC_DMA_REG(channel, DMA_CH_TCR));
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_CH_TCR_PBL_POS,
+ DMA_CH_TCR_PBL_LEN,
+ pdata->tx_pbl);
+ writel(regval, XLGMAC_DMA_REG(channel, DMA_CH_TCR));
+ }
+
+ return 0;
+}
+
+static int xlgmac_get_rx_pbl_val(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = readl(XLGMAC_DMA_REG(pdata->channel_head, DMA_CH_RCR));
+ regval = XLGMAC_GET_REG_BITS(regval, DMA_CH_RCR_PBL_POS,
+ DMA_CH_RCR_PBL_LEN);
+ return regval;
+}
+
+static int xlgmac_config_rx_pbl_val(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+ u32 regval;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (!channel->rx_ring)
+ break;
+
+ regval = readl(XLGMAC_DMA_REG(channel, DMA_CH_RCR));
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_CH_RCR_PBL_POS,
+ DMA_CH_RCR_PBL_LEN,
+ pdata->rx_pbl);
+ writel(regval, XLGMAC_DMA_REG(channel, DMA_CH_RCR));
+ }
+
+ return 0;
+}
+
+static u64 xlgmac_mmc_read(struct xlgmac_pdata *pdata, unsigned int reg_lo)
+{
+ bool read_hi;
+ u64 val;
+
+ switch (reg_lo) {
+ /* These registers are always 64 bit */
+ case MMC_TXOCTETCOUNT_GB_LO:
+ case MMC_TXOCTETCOUNT_G_LO:
+ case MMC_RXOCTETCOUNT_GB_LO:
+ case MMC_RXOCTETCOUNT_G_LO:
+ read_hi = true;
+ break;
+
+ default:
+ read_hi = false;
+ }
+
+ val = (u64)readl(pdata->mac_regs + reg_lo);
+
+ if (read_hi)
+ val |= ((u64)readl(pdata->mac_regs + reg_lo + 4) << 32);
+
+ return val;
+}
+
+static void xlgmac_tx_mmc_int(struct xlgmac_pdata *pdata)
+{
+ unsigned int mmc_isr = readl(pdata->mac_regs + MMC_TISR);
+ struct xlgmac_stats *stats = &pdata->stats;
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TXOCTETCOUNT_GB_POS,
+ MMC_TISR_TXOCTETCOUNT_GB_LEN))
+ stats->txoctetcount_gb +=
+ xlgmac_mmc_read(pdata, MMC_TXOCTETCOUNT_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TXFRAMECOUNT_GB_POS,
+ MMC_TISR_TXFRAMECOUNT_GB_LEN))
+ stats->txframecount_gb +=
+ xlgmac_mmc_read(pdata, MMC_TXFRAMECOUNT_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TXBROADCASTFRAMES_G_POS,
+ MMC_TISR_TXBROADCASTFRAMES_G_LEN))
+ stats->txbroadcastframes_g +=
+ xlgmac_mmc_read(pdata, MMC_TXBROADCASTFRAMES_G_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TXMULTICASTFRAMES_G_POS,
+ MMC_TISR_TXMULTICASTFRAMES_G_LEN))
+ stats->txmulticastframes_g +=
+ xlgmac_mmc_read(pdata, MMC_TXMULTICASTFRAMES_G_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TX64OCTETS_GB_POS,
+ MMC_TISR_TX64OCTETS_GB_LEN))
+ stats->tx64octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_TX64OCTETS_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TX65TO127OCTETS_GB_POS,
+ MMC_TISR_TX65TO127OCTETS_GB_LEN))
+ stats->tx65to127octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_TX65TO127OCTETS_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TX128TO255OCTETS_GB_POS,
+ MMC_TISR_TX128TO255OCTETS_GB_LEN))
+ stats->tx128to255octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_TX128TO255OCTETS_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TX256TO511OCTETS_GB_POS,
+ MMC_TISR_TX256TO511OCTETS_GB_LEN))
+ stats->tx256to511octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_TX256TO511OCTETS_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TX512TO1023OCTETS_GB_POS,
+ MMC_TISR_TX512TO1023OCTETS_GB_LEN))
+ stats->tx512to1023octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_TX512TO1023OCTETS_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TX1024TOMAXOCTETS_GB_POS,
+ MMC_TISR_TX1024TOMAXOCTETS_GB_LEN))
+ stats->tx1024tomaxoctets_gb +=
+ xlgmac_mmc_read(pdata, MMC_TX1024TOMAXOCTETS_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TXUNICASTFRAMES_GB_POS,
+ MMC_TISR_TXUNICASTFRAMES_GB_LEN))
+ stats->txunicastframes_gb +=
+ xlgmac_mmc_read(pdata, MMC_TXUNICASTFRAMES_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TXMULTICASTFRAMES_GB_POS,
+ MMC_TISR_TXMULTICASTFRAMES_GB_LEN))
+ stats->txmulticastframes_gb +=
+ xlgmac_mmc_read(pdata, MMC_TXMULTICASTFRAMES_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TXBROADCASTFRAMES_GB_POS,
+ MMC_TISR_TXBROADCASTFRAMES_GB_LEN))
+ stats->txbroadcastframes_g +=
+ xlgmac_mmc_read(pdata, MMC_TXBROADCASTFRAMES_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TXUNDERFLOWERROR_POS,
+ MMC_TISR_TXUNDERFLOWERROR_LEN))
+ stats->txunderflowerror +=
+ xlgmac_mmc_read(pdata, MMC_TXUNDERFLOWERROR_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TXOCTETCOUNT_G_POS,
+ MMC_TISR_TXOCTETCOUNT_G_LEN))
+ stats->txoctetcount_g +=
+ xlgmac_mmc_read(pdata, MMC_TXOCTETCOUNT_G_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TXFRAMECOUNT_G_POS,
+ MMC_TISR_TXFRAMECOUNT_G_LEN))
+ stats->txframecount_g +=
+ xlgmac_mmc_read(pdata, MMC_TXFRAMECOUNT_G_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TXPAUSEFRAMES_POS,
+ MMC_TISR_TXPAUSEFRAMES_LEN))
+ stats->txpauseframes +=
+ xlgmac_mmc_read(pdata, MMC_TXPAUSEFRAMES_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_TISR_TXVLANFRAMES_G_POS,
+ MMC_TISR_TXVLANFRAMES_G_LEN))
+ stats->txvlanframes_g +=
+ xlgmac_mmc_read(pdata, MMC_TXVLANFRAMES_G_LO);
+}
+
+static void xlgmac_rx_mmc_int(struct xlgmac_pdata *pdata)
+{
+ unsigned int mmc_isr = readl(pdata->mac_regs + MMC_RISR);
+ struct xlgmac_stats *stats = &pdata->stats;
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXFRAMECOUNT_GB_POS,
+ MMC_RISR_RXFRAMECOUNT_GB_LEN))
+ stats->rxframecount_gb +=
+ xlgmac_mmc_read(pdata, MMC_RXFRAMECOUNT_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXOCTETCOUNT_GB_POS,
+ MMC_RISR_RXOCTETCOUNT_GB_LEN))
+ stats->rxoctetcount_gb +=
+ xlgmac_mmc_read(pdata, MMC_RXOCTETCOUNT_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXOCTETCOUNT_G_POS,
+ MMC_RISR_RXOCTETCOUNT_G_LEN))
+ stats->rxoctetcount_g +=
+ xlgmac_mmc_read(pdata, MMC_RXOCTETCOUNT_G_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXBROADCASTFRAMES_G_POS,
+ MMC_RISR_RXBROADCASTFRAMES_G_LEN))
+ stats->rxbroadcastframes_g +=
+ xlgmac_mmc_read(pdata, MMC_RXBROADCASTFRAMES_G_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXMULTICASTFRAMES_G_POS,
+ MMC_RISR_RXMULTICASTFRAMES_G_LEN))
+ stats->rxmulticastframes_g +=
+ xlgmac_mmc_read(pdata, MMC_RXMULTICASTFRAMES_G_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXCRCERROR_POS,
+ MMC_RISR_RXCRCERROR_LEN))
+ stats->rxcrcerror +=
+ xlgmac_mmc_read(pdata, MMC_RXCRCERROR_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXRUNTERROR_POS,
+ MMC_RISR_RXRUNTERROR_LEN))
+ stats->rxrunterror +=
+ xlgmac_mmc_read(pdata, MMC_RXRUNTERROR);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXJABBERERROR_POS,
+ MMC_RISR_RXJABBERERROR_LEN))
+ stats->rxjabbererror +=
+ xlgmac_mmc_read(pdata, MMC_RXJABBERERROR);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXUNDERSIZE_G_POS,
+ MMC_RISR_RXUNDERSIZE_G_LEN))
+ stats->rxundersize_g +=
+ xlgmac_mmc_read(pdata, MMC_RXUNDERSIZE_G);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXOVERSIZE_G_POS,
+ MMC_RISR_RXOVERSIZE_G_LEN))
+ stats->rxoversize_g +=
+ xlgmac_mmc_read(pdata, MMC_RXOVERSIZE_G);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RX64OCTETS_GB_POS,
+ MMC_RISR_RX64OCTETS_GB_LEN))
+ stats->rx64octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_RX64OCTETS_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RX65TO127OCTETS_GB_POS,
+ MMC_RISR_RX65TO127OCTETS_GB_LEN))
+ stats->rx65to127octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_RX65TO127OCTETS_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RX128TO255OCTETS_GB_POS,
+ MMC_RISR_RX128TO255OCTETS_GB_LEN))
+ stats->rx128to255octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_RX128TO255OCTETS_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RX256TO511OCTETS_GB_POS,
+ MMC_RISR_RX256TO511OCTETS_GB_LEN))
+ stats->rx256to511octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_RX256TO511OCTETS_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RX512TO1023OCTETS_GB_POS,
+ MMC_RISR_RX512TO1023OCTETS_GB_LEN))
+ stats->rx512to1023octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_RX512TO1023OCTETS_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RX1024TOMAXOCTETS_GB_POS,
+ MMC_RISR_RX1024TOMAXOCTETS_GB_LEN))
+ stats->rx1024tomaxoctets_gb +=
+ xlgmac_mmc_read(pdata, MMC_RX1024TOMAXOCTETS_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXUNICASTFRAMES_G_POS,
+ MMC_RISR_RXUNICASTFRAMES_G_LEN))
+ stats->rxunicastframes_g +=
+ xlgmac_mmc_read(pdata, MMC_RXUNICASTFRAMES_G_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXLENGTHERROR_POS,
+ MMC_RISR_RXLENGTHERROR_LEN))
+ stats->rxlengtherror +=
+ xlgmac_mmc_read(pdata, MMC_RXLENGTHERROR_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXOUTOFRANGETYPE_POS,
+ MMC_RISR_RXOUTOFRANGETYPE_LEN))
+ stats->rxoutofrangetype +=
+ xlgmac_mmc_read(pdata, MMC_RXOUTOFRANGETYPE_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXPAUSEFRAMES_POS,
+ MMC_RISR_RXPAUSEFRAMES_LEN))
+ stats->rxpauseframes +=
+ xlgmac_mmc_read(pdata, MMC_RXPAUSEFRAMES_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXFIFOOVERFLOW_POS,
+ MMC_RISR_RXFIFOOVERFLOW_LEN))
+ stats->rxfifooverflow +=
+ xlgmac_mmc_read(pdata, MMC_RXFIFOOVERFLOW_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXVLANFRAMES_GB_POS,
+ MMC_RISR_RXVLANFRAMES_GB_LEN))
+ stats->rxvlanframes_gb +=
+ xlgmac_mmc_read(pdata, MMC_RXVLANFRAMES_GB_LO);
+
+ if (XLGMAC_GET_REG_BITS(mmc_isr,
+ MMC_RISR_RXWATCHDOGERROR_POS,
+ MMC_RISR_RXWATCHDOGERROR_LEN))
+ stats->rxwatchdogerror +=
+ xlgmac_mmc_read(pdata, MMC_RXWATCHDOGERROR);
+}
+
+static void xlgmac_read_mmc_stats(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_stats *stats = &pdata->stats;
+ u32 regval;
+
+ /* Freeze counters */
+ regval = readl(pdata->mac_regs + MMC_CR);
+ regval = XLGMAC_SET_REG_BITS(regval, MMC_CR_MCF_POS,
+ MMC_CR_MCF_LEN, 1);
+ writel(regval, pdata->mac_regs + MMC_CR);
+
+ stats->txoctetcount_gb +=
+ xlgmac_mmc_read(pdata, MMC_TXOCTETCOUNT_GB_LO);
+
+ stats->txframecount_gb +=
+ xlgmac_mmc_read(pdata, MMC_TXFRAMECOUNT_GB_LO);
+
+ stats->txbroadcastframes_g +=
+ xlgmac_mmc_read(pdata, MMC_TXBROADCASTFRAMES_G_LO);
+
+ stats->txmulticastframes_g +=
+ xlgmac_mmc_read(pdata, MMC_TXMULTICASTFRAMES_G_LO);
+
+ stats->tx64octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_TX64OCTETS_GB_LO);
+
+ stats->tx65to127octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_TX65TO127OCTETS_GB_LO);
+
+ stats->tx128to255octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_TX128TO255OCTETS_GB_LO);
+
+ stats->tx256to511octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_TX256TO511OCTETS_GB_LO);
+
+ stats->tx512to1023octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_TX512TO1023OCTETS_GB_LO);
+
+ stats->tx1024tomaxoctets_gb +=
+ xlgmac_mmc_read(pdata, MMC_TX1024TOMAXOCTETS_GB_LO);
+
+ stats->txunicastframes_gb +=
+ xlgmac_mmc_read(pdata, MMC_TXUNICASTFRAMES_GB_LO);
+
+ stats->txmulticastframes_gb +=
+ xlgmac_mmc_read(pdata, MMC_TXMULTICASTFRAMES_GB_LO);
+
+ stats->txbroadcastframes_g +=
+ xlgmac_mmc_read(pdata, MMC_TXBROADCASTFRAMES_GB_LO);
+
+ stats->txunderflowerror +=
+ xlgmac_mmc_read(pdata, MMC_TXUNDERFLOWERROR_LO);
+
+ stats->txoctetcount_g +=
+ xlgmac_mmc_read(pdata, MMC_TXOCTETCOUNT_G_LO);
+
+ stats->txframecount_g +=
+ xlgmac_mmc_read(pdata, MMC_TXFRAMECOUNT_G_LO);
+
+ stats->txpauseframes +=
+ xlgmac_mmc_read(pdata, MMC_TXPAUSEFRAMES_LO);
+
+ stats->txvlanframes_g +=
+ xlgmac_mmc_read(pdata, MMC_TXVLANFRAMES_G_LO);
+
+ stats->rxframecount_gb +=
+ xlgmac_mmc_read(pdata, MMC_RXFRAMECOUNT_GB_LO);
+
+ stats->rxoctetcount_gb +=
+ xlgmac_mmc_read(pdata, MMC_RXOCTETCOUNT_GB_LO);
+
+ stats->rxoctetcount_g +=
+ xlgmac_mmc_read(pdata, MMC_RXOCTETCOUNT_G_LO);
+
+ stats->rxbroadcastframes_g +=
+ xlgmac_mmc_read(pdata, MMC_RXBROADCASTFRAMES_G_LO);
+
+ stats->rxmulticastframes_g +=
+ xlgmac_mmc_read(pdata, MMC_RXMULTICASTFRAMES_G_LO);
+
+ stats->rxcrcerror +=
+ xlgmac_mmc_read(pdata, MMC_RXCRCERROR_LO);
+
+ stats->rxrunterror +=
+ xlgmac_mmc_read(pdata, MMC_RXRUNTERROR);
+
+ stats->rxjabbererror +=
+ xlgmac_mmc_read(pdata, MMC_RXJABBERERROR);
+
+ stats->rxundersize_g +=
+ xlgmac_mmc_read(pdata, MMC_RXUNDERSIZE_G);
+
+ stats->rxoversize_g +=
+ xlgmac_mmc_read(pdata, MMC_RXOVERSIZE_G);
+
+ stats->rx64octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_RX64OCTETS_GB_LO);
+
+ stats->rx65to127octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_RX65TO127OCTETS_GB_LO);
+
+ stats->rx128to255octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_RX128TO255OCTETS_GB_LO);
+
+ stats->rx256to511octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_RX256TO511OCTETS_GB_LO);
+
+ stats->rx512to1023octets_gb +=
+ xlgmac_mmc_read(pdata, MMC_RX512TO1023OCTETS_GB_LO);
+
+ stats->rx1024tomaxoctets_gb +=
+ xlgmac_mmc_read(pdata, MMC_RX1024TOMAXOCTETS_GB_LO);
+
+ stats->rxunicastframes_g +=
+ xlgmac_mmc_read(pdata, MMC_RXUNICASTFRAMES_G_LO);
+
+ stats->rxlengtherror +=
+ xlgmac_mmc_read(pdata, MMC_RXLENGTHERROR_LO);
+
+ stats->rxoutofrangetype +=
+ xlgmac_mmc_read(pdata, MMC_RXOUTOFRANGETYPE_LO);
+
+ stats->rxpauseframes +=
+ xlgmac_mmc_read(pdata, MMC_RXPAUSEFRAMES_LO);
+
+ stats->rxfifooverflow +=
+ xlgmac_mmc_read(pdata, MMC_RXFIFOOVERFLOW_LO);
+
+ stats->rxvlanframes_gb +=
+ xlgmac_mmc_read(pdata, MMC_RXVLANFRAMES_GB_LO);
+
+ stats->rxwatchdogerror +=
+ xlgmac_mmc_read(pdata, MMC_RXWATCHDOGERROR);
+
+ /* Un-freeze counters */
+ regval = readl(pdata->mac_regs + MMC_CR);
+ regval = XLGMAC_SET_REG_BITS(regval, MMC_CR_MCF_POS,
+ MMC_CR_MCF_LEN, 0);
+ writel(regval, pdata->mac_regs + MMC_CR);
+}
+
+static void xlgmac_config_mmc(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = readl(pdata->mac_regs + MMC_CR);
+ /* Set counters to reset on read */
+ regval = XLGMAC_SET_REG_BITS(regval, MMC_CR_ROR_POS,
+ MMC_CR_ROR_LEN, 1);
+ /* Reset the counters */
+ regval = XLGMAC_SET_REG_BITS(regval, MMC_CR_CR_POS,
+ MMC_CR_CR_LEN, 1);
+ writel(regval, pdata->mac_regs + MMC_CR);
+}
+
+static int xlgmac_write_rss_reg(struct xlgmac_pdata *pdata, unsigned int type,
+ unsigned int index, unsigned int val)
+{
+ unsigned int wait;
+ int ret = 0;
+ u32 regval;
+
+ mutex_lock(&pdata->rss_mutex);
+
+ regval = XLGMAC_GET_REG_BITS(readl(pdata->mac_regs + MAC_RSSAR),
+ MAC_RSSAR_OB_POS, MAC_RSSAR_OB_LEN);
+ if (regval) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ writel(val, pdata->mac_regs + MAC_RSSDR);
+
+ regval = readl(pdata->mac_regs + MAC_RSSAR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RSSAR_RSSIA_POS,
+ MAC_RSSAR_RSSIA_LEN, index);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RSSAR_ADDRT_POS,
+ MAC_RSSAR_ADDRT_LEN, type);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RSSAR_CT_POS,
+ MAC_RSSAR_CT_LEN, 0);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RSSAR_OB_POS,
+ MAC_RSSAR_OB_LEN, 1);
+ writel(regval, pdata->mac_regs + MAC_RSSAR);
+
+ wait = 1000;
+ while (wait--) {
+ regval = XLGMAC_GET_REG_BITS(readl(pdata->mac_regs + MAC_RSSAR),
+ MAC_RSSAR_OB_POS,
+ MAC_RSSAR_OB_LEN);
+ if (!regval)
+ goto unlock;
+
+ usleep_range(1000, 1500);
+ }
+
+ ret = -EBUSY;
+
+unlock:
+ mutex_unlock(&pdata->rss_mutex);
+
+ return ret;
+}
+
+static int xlgmac_write_rss_hash_key(struct xlgmac_pdata *pdata)
+{
+ unsigned int key_regs = sizeof(pdata->rss_key) / sizeof(u32);
+ unsigned int *key = (unsigned int *)&pdata->rss_key;
+ int ret;
+
+ while (key_regs--) {
+ ret = xlgmac_write_rss_reg(pdata, XLGMAC_RSS_HASH_KEY_TYPE,
+ key_regs, *key++);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int xlgmac_write_rss_lookup_table(struct xlgmac_pdata *pdata)
+{
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < ARRAY_SIZE(pdata->rss_table); i++) {
+ ret = xlgmac_write_rss_reg(pdata,
+ XLGMAC_RSS_LOOKUP_TABLE_TYPE, i,
+ pdata->rss_table[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int xlgmac_set_rss_hash_key(struct xlgmac_pdata *pdata, const u8 *key)
+{
+ memcpy(pdata->rss_key, key, sizeof(pdata->rss_key));
+
+ return xlgmac_write_rss_hash_key(pdata);
+}
+
+static int xlgmac_set_rss_lookup_table(struct xlgmac_pdata *pdata,
+ const u32 *table)
+{
+ unsigned int i;
+ u32 tval;
+
+ for (i = 0; i < ARRAY_SIZE(pdata->rss_table); i++) {
+ tval = table[i];
+ pdata->rss_table[i] = XLGMAC_SET_REG_BITS(
+ pdata->rss_table[i],
+ MAC_RSSDR_DMCH_POS,
+ MAC_RSSDR_DMCH_LEN,
+ tval);
+ }
+
+ return xlgmac_write_rss_lookup_table(pdata);
+}
+
+static int xlgmac_enable_rss(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+ int ret;
+
+ if (!pdata->hw_feat.rss)
+ return -EOPNOTSUPP;
+
+ /* Program the hash key */
+ ret = xlgmac_write_rss_hash_key(pdata);
+ if (ret)
+ return ret;
+
+ /* Program the lookup table */
+ ret = xlgmac_write_rss_lookup_table(pdata);
+ if (ret)
+ return ret;
+
+ /* Set the RSS options */
+ writel(pdata->rss_options, pdata->mac_regs + MAC_RSSCR);
+
+ /* Enable RSS */
+ regval = readl(pdata->mac_regs + MAC_RSSCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RSSCR_RSSE_POS,
+ MAC_RSSCR_RSSE_LEN, 1);
+ writel(regval, pdata->mac_regs + MAC_RSSCR);
+
+ return 0;
+}
+
+static int xlgmac_disable_rss(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ if (!pdata->hw_feat.rss)
+ return -EOPNOTSUPP;
+
+ regval = readl(pdata->mac_regs + MAC_RSSCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_RSSCR_RSSE_POS,
+ MAC_RSSCR_RSSE_LEN, 0);
+ writel(regval, pdata->mac_regs + MAC_RSSCR);
+
+ return 0;
+}
+
+static void xlgmac_config_rss(struct xlgmac_pdata *pdata)
+{
+ int ret;
+
+ if (!pdata->hw_feat.rss)
+ return;
+
+ if (pdata->netdev->features & NETIF_F_RXHASH)
+ ret = xlgmac_enable_rss(pdata);
+ else
+ ret = xlgmac_disable_rss(pdata);
+
+ if (ret)
+ netdev_err(pdata->netdev,
+ "error configuring RSS, RSS disabled\n");
+}
+
+static void xlgmac_enable_dma_interrupts(struct xlgmac_pdata *pdata)
+{
+ unsigned int dma_ch_isr, dma_ch_ier;
+ struct xlgmac_channel *channel;
+ unsigned int i;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ /* Clear all the interrupts which are set */
+ dma_ch_isr = readl(XLGMAC_DMA_REG(channel, DMA_CH_SR));
+ writel(dma_ch_isr, XLGMAC_DMA_REG(channel, DMA_CH_SR));
+
+ /* Clear all interrupt enable bits */
+ dma_ch_ier = 0;
+
+ /* Enable following interrupts
+ * NIE - Normal Interrupt Summary Enable
+ * AIE - Abnormal Interrupt Summary Enable
+ * FBEE - Fatal Bus Error Enable
+ */
+ dma_ch_ier = XLGMAC_SET_REG_BITS(dma_ch_ier,
+ DMA_CH_IER_NIE_POS,
+ DMA_CH_IER_NIE_LEN, 1);
+ dma_ch_ier = XLGMAC_SET_REG_BITS(dma_ch_ier,
+ DMA_CH_IER_AIE_POS,
+ DMA_CH_IER_AIE_LEN, 1);
+ dma_ch_ier = XLGMAC_SET_REG_BITS(dma_ch_ier,
+ DMA_CH_IER_FBEE_POS,
+ DMA_CH_IER_FBEE_LEN, 1);
+
+ if (channel->tx_ring) {
+ /* Enable the following Tx interrupts
+ * TIE - Transmit Interrupt Enable (unless using
+ * per channel interrupts)
+ */
+ if (!pdata->per_channel_irq)
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier,
+ DMA_CH_IER_TIE_POS,
+ DMA_CH_IER_TIE_LEN,
+ 1);
+ }
+ if (channel->rx_ring) {
+ /* Enable following Rx interrupts
+ * RBUE - Receive Buffer Unavailable Enable
+ * RIE - Receive Interrupt Enable (unless using
+ * per channel interrupts)
+ */
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier,
+ DMA_CH_IER_RBUE_POS,
+ DMA_CH_IER_RBUE_LEN,
+ 1);
+ if (!pdata->per_channel_irq)
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier,
+ DMA_CH_IER_RIE_POS,
+ DMA_CH_IER_RIE_LEN,
+ 1);
+ }
+
+ writel(dma_ch_isr, XLGMAC_DMA_REG(channel, DMA_CH_IER));
+ }
+}
+
+static void xlgmac_enable_mtl_interrupts(struct xlgmac_pdata *pdata)
+{
+ unsigned int q_count, i;
+ unsigned int mtl_q_isr;
+
+ q_count = max(pdata->hw_feat.tx_q_cnt, pdata->hw_feat.rx_q_cnt);
+ for (i = 0; i < q_count; i++) {
+ /* Clear all the interrupts which are set */
+ mtl_q_isr = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_ISR));
+ writel(mtl_q_isr, XLGMAC_MTL_REG(pdata, i, MTL_Q_ISR));
+
+ /* No MTL interrupts to be enabled */
+ writel(0, XLGMAC_MTL_REG(pdata, i, MTL_Q_IER));
+ }
+}
+
+static void xlgmac_enable_mac_interrupts(struct xlgmac_pdata *pdata)
+{
+ unsigned int mac_ier = 0;
+ u32 regval;
+
+ /* Enable Timestamp interrupt */
+ mac_ier = XLGMAC_SET_REG_BITS(mac_ier, MAC_IER_TSIE_POS,
+ MAC_IER_TSIE_LEN, 1);
+
+ writel(mac_ier, pdata->mac_regs + MAC_IER);
+
+ /* Enable all counter interrupts */
+ regval = readl(pdata->mac_regs + MMC_RIER);
+ regval = XLGMAC_SET_REG_BITS(regval, MMC_RIER_ALL_INTERRUPTS_POS,
+ MMC_RIER_ALL_INTERRUPTS_LEN, 0xffffffff);
+ writel(regval, pdata->mac_regs + MMC_RIER);
+ regval = readl(pdata->mac_regs + MMC_TIER);
+ regval = XLGMAC_SET_REG_BITS(regval, MMC_TIER_ALL_INTERRUPTS_POS,
+ MMC_TIER_ALL_INTERRUPTS_LEN, 0xffffffff);
+ writel(regval, pdata->mac_regs + MMC_TIER);
+}
+
+static int xlgmac_set_xlgmii_25000_speed(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = XLGMAC_GET_REG_BITS(readl(pdata->mac_regs + MAC_TCR),
+ MAC_TCR_SS_POS, MAC_TCR_SS_LEN);
+ if (regval == 0x1)
+ return 0;
+
+ regval = readl(pdata->mac_regs + MAC_TCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_TCR_SS_POS,
+ MAC_TCR_SS_LEN, 0x1);
+ writel(regval, pdata->mac_regs + MAC_TCR);
+
+ return 0;
+}
+
+static int xlgmac_set_xlgmii_40000_speed(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = XLGMAC_GET_REG_BITS(readl(pdata->mac_regs + MAC_TCR),
+ MAC_TCR_SS_POS, MAC_TCR_SS_LEN);
+ if (regval == 0)
+ return 0;
+
+ regval = readl(pdata->mac_regs + MAC_TCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_TCR_SS_POS,
+ MAC_TCR_SS_LEN, 0);
+ writel(regval, pdata->mac_regs + MAC_TCR);
+
+ return 0;
+}
+
+static int xlgmac_set_xlgmii_50000_speed(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = XLGMAC_GET_REG_BITS(readl(pdata->mac_regs + MAC_TCR),
+ MAC_TCR_SS_POS, MAC_TCR_SS_LEN);
+ if (regval == 0x2)
+ return 0;
+
+ regval = readl(pdata->mac_regs + MAC_TCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_TCR_SS_POS,
+ MAC_TCR_SS_LEN, 0x2);
+ writel(regval, pdata->mac_regs + MAC_TCR);
+
+ return 0;
+}
+
+static int xlgmac_set_xlgmii_100000_speed(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = XLGMAC_GET_REG_BITS(readl(pdata->mac_regs + MAC_TCR),
+ MAC_TCR_SS_POS, MAC_TCR_SS_LEN);
+ if (regval == 0x3)
+ return 0;
+
+ regval = readl(pdata->mac_regs + MAC_TCR);
+ regval = XLGMAC_SET_REG_BITS(regval, MAC_TCR_SS_POS,
+ MAC_TCR_SS_LEN, 0x3);
+ writel(regval, pdata->mac_regs + MAC_TCR);
+
+ return 0;
+}
+
+static void xlgmac_config_mac_speed(struct xlgmac_pdata *pdata)
+{
+ switch (pdata->phy_speed) {
+ case SPEED_100000:
+ xlgmac_set_xlgmii_100000_speed(pdata);
+ break;
+
+ case SPEED_50000:
+ xlgmac_set_xlgmii_50000_speed(pdata);
+ break;
+
+ case SPEED_40000:
+ xlgmac_set_xlgmii_40000_speed(pdata);
+ break;
+
+ case SPEED_25000:
+ xlgmac_set_xlgmii_25000_speed(pdata);
+ break;
+ }
+}
+
+static int xlgmac_dev_read(struct xlgmac_channel *channel)
+{
+ struct xlgmac_pdata *pdata = channel->pdata;
+ struct xlgmac_ring *ring = channel->rx_ring;
+ struct net_device *netdev = pdata->netdev;
+ struct xlgmac_desc_data *desc_data;
+ struct xlgmac_dma_desc *dma_desc;
+ struct xlgmac_pkt_info *pkt_info;
+ unsigned int err, etlt, l34t;
+
+ desc_data = XLGMAC_GET_DESC_DATA(ring, ring->cur);
+ dma_desc = desc_data->dma_desc;
+ pkt_info = &ring->pkt_info;
+
+ /* Check for data availability */
+ if (XLGMAC_GET_REG_BITS_LE(dma_desc->desc3,
+ RX_NORMAL_DESC3_OWN_POS,
+ RX_NORMAL_DESC3_OWN_LEN))
+ return 1;
+
+ /* Make sure descriptor fields are read after reading the OWN bit */
+ dma_rmb();
+
+ if (netif_msg_rx_status(pdata))
+ xlgmac_dump_rx_desc(pdata, ring, ring->cur);
+
+ if (XLGMAC_GET_REG_BITS_LE(dma_desc->desc3,
+ RX_NORMAL_DESC3_CTXT_POS,
+ RX_NORMAL_DESC3_CTXT_LEN)) {
+ /* Timestamp Context Descriptor */
+ xlgmac_get_rx_tstamp(pkt_info, dma_desc);
+
+ pkt_info->attributes = XLGMAC_SET_REG_BITS(
+ pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_CONTEXT_POS,
+ RX_PACKET_ATTRIBUTES_CONTEXT_LEN,
+ 1);
+ pkt_info->attributes = XLGMAC_SET_REG_BITS(
+ pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_CONTEXT_NEXT_POS,
+ RX_PACKET_ATTRIBUTES_CONTEXT_NEXT_LEN,
+ 0);
+ return 0;
+ }
+
+ /* Normal Descriptor, be sure Context Descriptor bit is off */
+ pkt_info->attributes = XLGMAC_SET_REG_BITS(
+ pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_CONTEXT_POS,
+ RX_PACKET_ATTRIBUTES_CONTEXT_LEN,
+ 0);
+
+ /* Indicate if a Context Descriptor is next */
+ if (XLGMAC_GET_REG_BITS_LE(dma_desc->desc3,
+ RX_NORMAL_DESC3_CDA_POS,
+ RX_NORMAL_DESC3_CDA_LEN))
+ pkt_info->attributes = XLGMAC_SET_REG_BITS(
+ pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_CONTEXT_NEXT_POS,
+ RX_PACKET_ATTRIBUTES_CONTEXT_NEXT_LEN,
+ 1);
+
+ /* Get the header length */
+ if (XLGMAC_GET_REG_BITS_LE(dma_desc->desc3,
+ RX_NORMAL_DESC3_FD_POS,
+ RX_NORMAL_DESC3_FD_LEN)) {
+ desc_data->rx.hdr_len = XLGMAC_GET_REG_BITS_LE(dma_desc->desc2,
+ RX_NORMAL_DESC2_HL_POS,
+ RX_NORMAL_DESC2_HL_LEN);
+ if (desc_data->rx.hdr_len)
+ pdata->stats.rx_split_header_packets++;
+ }
+
+ /* Get the RSS hash */
+ if (XLGMAC_GET_REG_BITS_LE(dma_desc->desc3,
+ RX_NORMAL_DESC3_RSV_POS,
+ RX_NORMAL_DESC3_RSV_LEN)) {
+ pkt_info->attributes = XLGMAC_SET_REG_BITS(
+ pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_RSS_HASH_POS,
+ RX_PACKET_ATTRIBUTES_RSS_HASH_LEN,
+ 1);
+
+ pkt_info->rss_hash = le32_to_cpu(dma_desc->desc1);
+
+ l34t = XLGMAC_GET_REG_BITS_LE(dma_desc->desc3,
+ RX_NORMAL_DESC3_L34T_POS,
+ RX_NORMAL_DESC3_L34T_LEN);
+ switch (l34t) {
+ case RX_DESC3_L34T_IPV4_TCP:
+ case RX_DESC3_L34T_IPV4_UDP:
+ case RX_DESC3_L34T_IPV6_TCP:
+ case RX_DESC3_L34T_IPV6_UDP:
+ pkt_info->rss_hash_type = PKT_HASH_TYPE_L4;
+ break;
+ default:
+ pkt_info->rss_hash_type = PKT_HASH_TYPE_L3;
+ }
+ }
+
+ /* Get the pkt_info length */
+ desc_data->rx.len = XLGMAC_GET_REG_BITS_LE(dma_desc->desc3,
+ RX_NORMAL_DESC3_PL_POS,
+ RX_NORMAL_DESC3_PL_LEN);
+
+ if (!XLGMAC_GET_REG_BITS_LE(dma_desc->desc3,
+ RX_NORMAL_DESC3_LD_POS,
+ RX_NORMAL_DESC3_LD_LEN)) {
+ /* Not all the data has been transferred for this pkt_info */
+ pkt_info->attributes = XLGMAC_SET_REG_BITS(
+ pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_INCOMPLETE_POS,
+ RX_PACKET_ATTRIBUTES_INCOMPLETE_LEN,
+ 1);
+ return 0;
+ }
+
+ /* This is the last of the data for this pkt_info */
+ pkt_info->attributes = XLGMAC_SET_REG_BITS(
+ pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_INCOMPLETE_POS,
+ RX_PACKET_ATTRIBUTES_INCOMPLETE_LEN,
+ 0);
+
+ /* Set checksum done indicator as appropriate */
+ if (netdev->features & NETIF_F_RXCSUM)
+ pkt_info->attributes = XLGMAC_SET_REG_BITS(
+ pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_CSUM_DONE_POS,
+ RX_PACKET_ATTRIBUTES_CSUM_DONE_LEN,
+ 1);
+
+ /* Check for errors (only valid in last descriptor) */
+ err = XLGMAC_GET_REG_BITS_LE(dma_desc->desc3,
+ RX_NORMAL_DESC3_ES_POS,
+ RX_NORMAL_DESC3_ES_LEN);
+ etlt = XLGMAC_GET_REG_BITS_LE(dma_desc->desc3,
+ RX_NORMAL_DESC3_ETLT_POS,
+ RX_NORMAL_DESC3_ETLT_LEN);
+ netif_dbg(pdata, rx_status, netdev, "err=%u, etlt=%#x\n", err, etlt);
+
+ if (!err || !etlt) {
+ /* No error if err is 0 or etlt is 0 */
+ if ((etlt == 0x09) &&
+ (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)) {
+ pkt_info->attributes = XLGMAC_SET_REG_BITS(
+ pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_VLAN_CTAG_POS,
+ RX_PACKET_ATTRIBUTES_VLAN_CTAG_LEN,
+ 1);
+ pkt_info->vlan_ctag =
+ XLGMAC_GET_REG_BITS_LE(dma_desc->desc0,
+ RX_NORMAL_DESC0_OVT_POS,
+ RX_NORMAL_DESC0_OVT_LEN);
+ netif_dbg(pdata, rx_status, netdev, "vlan-ctag=%#06x\n",
+ pkt_info->vlan_ctag);
+ }
+ } else {
+ if ((etlt == 0x05) || (etlt == 0x06))
+ pkt_info->attributes = XLGMAC_SET_REG_BITS(
+ pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_CSUM_DONE_POS,
+ RX_PACKET_ATTRIBUTES_CSUM_DONE_LEN,
+ 0);
+ else
+ pkt_info->errors = XLGMAC_SET_REG_BITS(
+ pkt_info->errors,
+ RX_PACKET_ERRORS_FRAME_POS,
+ RX_PACKET_ERRORS_FRAME_LEN,
+ 1);
+ }
+
+ XLGMAC_PR("%s - descriptor=%u (cur=%d)\n", channel->name,
+ ring->cur & (ring->dma_desc_count - 1), ring->cur);
+
+ return 0;
+}
+
+static int xlgmac_enable_int(struct xlgmac_channel *channel,
+ enum xlgmac_int int_id)
+{
+ unsigned int dma_ch_ier;
+
+ dma_ch_ier = readl(XLGMAC_DMA_REG(channel, DMA_CH_IER));
+
+ switch (int_id) {
+ case XLGMAC_INT_DMA_CH_SR_TI:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_TIE_POS,
+ DMA_CH_IER_TIE_LEN, 1);
+ break;
+ case XLGMAC_INT_DMA_CH_SR_TPS:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_TXSE_POS,
+ DMA_CH_IER_TXSE_LEN, 1);
+ break;
+ case XLGMAC_INT_DMA_CH_SR_TBU:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_TBUE_POS,
+ DMA_CH_IER_TBUE_LEN, 1);
+ break;
+ case XLGMAC_INT_DMA_CH_SR_RI:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_RIE_POS,
+ DMA_CH_IER_RIE_LEN, 1);
+ break;
+ case XLGMAC_INT_DMA_CH_SR_RBU:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_RBUE_POS,
+ DMA_CH_IER_RBUE_LEN, 1);
+ break;
+ case XLGMAC_INT_DMA_CH_SR_RPS:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_RSE_POS,
+ DMA_CH_IER_RSE_LEN, 1);
+ break;
+ case XLGMAC_INT_DMA_CH_SR_TI_RI:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_TIE_POS,
+ DMA_CH_IER_TIE_LEN, 1);
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_RIE_POS,
+ DMA_CH_IER_RIE_LEN, 1);
+ break;
+ case XLGMAC_INT_DMA_CH_SR_FBE:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_FBEE_POS,
+ DMA_CH_IER_FBEE_LEN, 1);
+ break;
+ case XLGMAC_INT_DMA_ALL:
+ dma_ch_ier |= channel->saved_ier;
+ break;
+ default:
+ return -1;
+ }
+
+ writel(dma_ch_ier, XLGMAC_DMA_REG(channel, DMA_CH_IER));
+
+ return 0;
+}
+
+static int xlgmac_disable_int(struct xlgmac_channel *channel,
+ enum xlgmac_int int_id)
+{
+ unsigned int dma_ch_ier;
+
+ dma_ch_ier = readl(XLGMAC_DMA_REG(channel, DMA_CH_IER));
+
+ switch (int_id) {
+ case XLGMAC_INT_DMA_CH_SR_TI:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_TIE_POS,
+ DMA_CH_IER_TIE_LEN, 0);
+ break;
+ case XLGMAC_INT_DMA_CH_SR_TPS:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_TXSE_POS,
+ DMA_CH_IER_TXSE_LEN, 0);
+ break;
+ case XLGMAC_INT_DMA_CH_SR_TBU:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_TBUE_POS,
+ DMA_CH_IER_TBUE_LEN, 0);
+ break;
+ case XLGMAC_INT_DMA_CH_SR_RI:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_RIE_POS,
+ DMA_CH_IER_RIE_LEN, 0);
+ break;
+ case XLGMAC_INT_DMA_CH_SR_RBU:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_RBUE_POS,
+ DMA_CH_IER_RBUE_LEN, 0);
+ break;
+ case XLGMAC_INT_DMA_CH_SR_RPS:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_RSE_POS,
+ DMA_CH_IER_RSE_LEN, 0);
+ break;
+ case XLGMAC_INT_DMA_CH_SR_TI_RI:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_TIE_POS,
+ DMA_CH_IER_TIE_LEN, 0);
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_RIE_POS,
+ DMA_CH_IER_RIE_LEN, 0);
+ break;
+ case XLGMAC_INT_DMA_CH_SR_FBE:
+ dma_ch_ier = XLGMAC_SET_REG_BITS(
+ dma_ch_ier, DMA_CH_IER_FBEE_POS,
+ DMA_CH_IER_FBEE_LEN, 0);
+ break;
+ case XLGMAC_INT_DMA_ALL:
+ channel->saved_ier = dma_ch_ier & XLGMAC_DMA_INTERRUPT_MASK;
+ dma_ch_ier &= ~XLGMAC_DMA_INTERRUPT_MASK;
+ break;
+ default:
+ return -1;
+ }
+
+ writel(dma_ch_ier, XLGMAC_DMA_REG(channel, DMA_CH_IER));
+
+ return 0;
+}
+
+static int xlgmac_flush_tx_queues(struct xlgmac_pdata *pdata)
+{
+ unsigned int i, count;
+ u32 regval;
+
+ for (i = 0; i < pdata->tx_q_count; i++) {
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_TQOMR));
+ regval = XLGMAC_SET_REG_BITS(regval, MTL_Q_TQOMR_FTQ_POS,
+ MTL_Q_TQOMR_FTQ_LEN, 1);
+ writel(regval, XLGMAC_MTL_REG(pdata, i, MTL_Q_TQOMR));
+ }
+
+ /* Poll Until Poll Condition */
+ for (i = 0; i < pdata->tx_q_count; i++) {
+ count = 2000;
+ regval = readl(XLGMAC_MTL_REG(pdata, i, MTL_Q_TQOMR));
+ regval = XLGMAC_GET_REG_BITS(regval, MTL_Q_TQOMR_FTQ_POS,
+ MTL_Q_TQOMR_FTQ_LEN);
+ while (--count && regval)
+ usleep_range(500, 600);
+
+ if (!count)
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+static void xlgmac_config_dma_bus(struct xlgmac_pdata *pdata)
+{
+ u32 regval;
+
+ regval = readl(pdata->mac_regs + DMA_SBMR);
+ /* Set enhanced addressing mode */
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_SBMR_EAME_POS,
+ DMA_SBMR_EAME_LEN, 1);
+ /* Set the System Bus mode */
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_SBMR_UNDEF_POS,
+ DMA_SBMR_UNDEF_LEN, 1);
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_SBMR_BLEN_256_POS,
+ DMA_SBMR_BLEN_256_LEN, 1);
+ writel(regval, pdata->mac_regs + DMA_SBMR);
+}
+
+static int xlgmac_hw_init(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_desc_ops *desc_ops = &pdata->desc_ops;
+ int ret;
+
+ /* Flush Tx queues */
+ ret = xlgmac_flush_tx_queues(pdata);
+ if (ret)
+ return ret;
+
+ /* Initialize DMA related features */
+ xlgmac_config_dma_bus(pdata);
+ xlgmac_config_osp_mode(pdata);
+ xlgmac_config_pblx8(pdata);
+ xlgmac_config_tx_pbl_val(pdata);
+ xlgmac_config_rx_pbl_val(pdata);
+ xlgmac_config_rx_coalesce(pdata);
+ xlgmac_config_tx_coalesce(pdata);
+ xlgmac_config_rx_buffer_size(pdata);
+ xlgmac_config_tso_mode(pdata);
+ xlgmac_config_sph_mode(pdata);
+ xlgmac_config_rss(pdata);
+ desc_ops->tx_desc_init(pdata);
+ desc_ops->rx_desc_init(pdata);
+ xlgmac_enable_dma_interrupts(pdata);
+
+ /* Initialize MTL related features */
+ xlgmac_config_mtl_mode(pdata);
+ xlgmac_config_queue_mapping(pdata);
+ xlgmac_config_tsf_mode(pdata, pdata->tx_sf_mode);
+ xlgmac_config_rsf_mode(pdata, pdata->rx_sf_mode);
+ xlgmac_config_tx_threshold(pdata, pdata->tx_threshold);
+ xlgmac_config_rx_threshold(pdata, pdata->rx_threshold);
+ xlgmac_config_tx_fifo_size(pdata);
+ xlgmac_config_rx_fifo_size(pdata);
+ xlgmac_config_flow_control_threshold(pdata);
+ xlgmac_config_rx_fep_enable(pdata);
+ xlgmac_config_rx_fup_enable(pdata);
+ xlgmac_enable_mtl_interrupts(pdata);
+
+ /* Initialize MAC related features */
+ xlgmac_config_mac_address(pdata);
+ xlgmac_config_rx_mode(pdata);
+ xlgmac_config_jumbo_enable(pdata);
+ xlgmac_config_flow_control(pdata);
+ xlgmac_config_mac_speed(pdata);
+ xlgmac_config_checksum_offload(pdata);
+ xlgmac_config_vlan_support(pdata);
+ xlgmac_config_mmc(pdata);
+ xlgmac_enable_mac_interrupts(pdata);
+
+ return 0;
+}
+
+static int xlgmac_hw_exit(struct xlgmac_pdata *pdata)
+{
+ unsigned int count = 2000;
+ u32 regval;
+
+ /* Issue a software reset */
+ regval = readl(pdata->mac_regs + DMA_MR);
+ regval = XLGMAC_SET_REG_BITS(regval, DMA_MR_SWR_POS,
+ DMA_MR_SWR_LEN, 1);
+ writel(regval, pdata->mac_regs + DMA_MR);
+ usleep_range(10, 15);
+
+ /* Poll Until Poll Condition */
+ while (--count &&
+ XLGMAC_GET_REG_BITS(readl(pdata->mac_regs + DMA_MR),
+ DMA_MR_SWR_POS, DMA_MR_SWR_LEN))
+ usleep_range(500, 600);
+
+ if (!count)
+ return -EBUSY;
+
+ return 0;
+}
+
+void xlgmac_init_hw_ops(struct xlgmac_hw_ops *hw_ops)
+{
+ hw_ops->init = xlgmac_hw_init;
+ hw_ops->exit = xlgmac_hw_exit;
+
+ hw_ops->tx_complete = xlgmac_tx_complete;
+
+ hw_ops->enable_tx = xlgmac_enable_tx;
+ hw_ops->disable_tx = xlgmac_disable_tx;
+ hw_ops->enable_rx = xlgmac_enable_rx;
+ hw_ops->disable_rx = xlgmac_disable_rx;
+
+ hw_ops->dev_xmit = xlgmac_dev_xmit;
+ hw_ops->dev_read = xlgmac_dev_read;
+ hw_ops->enable_int = xlgmac_enable_int;
+ hw_ops->disable_int = xlgmac_disable_int;
+
+ hw_ops->set_mac_address = xlgmac_set_mac_address;
+ hw_ops->config_rx_mode = xlgmac_config_rx_mode;
+ hw_ops->enable_rx_csum = xlgmac_enable_rx_csum;
+ hw_ops->disable_rx_csum = xlgmac_disable_rx_csum;
+
+ /* For MII speed configuration */
+ hw_ops->set_xlgmii_25000_speed = xlgmac_set_xlgmii_25000_speed;
+ hw_ops->set_xlgmii_40000_speed = xlgmac_set_xlgmii_40000_speed;
+ hw_ops->set_xlgmii_50000_speed = xlgmac_set_xlgmii_50000_speed;
+ hw_ops->set_xlgmii_100000_speed = xlgmac_set_xlgmii_100000_speed;
+
+ /* For descriptor related operation */
+ hw_ops->tx_desc_init = xlgmac_tx_desc_init;
+ hw_ops->rx_desc_init = xlgmac_rx_desc_init;
+ hw_ops->tx_desc_reset = xlgmac_tx_desc_reset;
+ hw_ops->rx_desc_reset = xlgmac_rx_desc_reset;
+ hw_ops->is_last_desc = xlgmac_is_last_desc;
+ hw_ops->is_context_desc = xlgmac_is_context_desc;
+ hw_ops->tx_start_xmit = xlgmac_tx_start_xmit;
+
+ /* For Flow Control */
+ hw_ops->config_tx_flow_control = xlgmac_config_tx_flow_control;
+ hw_ops->config_rx_flow_control = xlgmac_config_rx_flow_control;
+
+ /* For Vlan related config */
+ hw_ops->enable_rx_vlan_stripping = xlgmac_enable_rx_vlan_stripping;
+ hw_ops->disable_rx_vlan_stripping = xlgmac_disable_rx_vlan_stripping;
+ hw_ops->enable_rx_vlan_filtering = xlgmac_enable_rx_vlan_filtering;
+ hw_ops->disable_rx_vlan_filtering = xlgmac_disable_rx_vlan_filtering;
+ hw_ops->update_vlan_hash_table = xlgmac_update_vlan_hash_table;
+
+ /* For RX coalescing */
+ hw_ops->config_rx_coalesce = xlgmac_config_rx_coalesce;
+ hw_ops->config_tx_coalesce = xlgmac_config_tx_coalesce;
+ hw_ops->usec_to_riwt = xlgmac_usec_to_riwt;
+ hw_ops->riwt_to_usec = xlgmac_riwt_to_usec;
+
+ /* For RX and TX threshold config */
+ hw_ops->config_rx_threshold = xlgmac_config_rx_threshold;
+ hw_ops->config_tx_threshold = xlgmac_config_tx_threshold;
+
+ /* For RX and TX Store and Forward Mode config */
+ hw_ops->config_rsf_mode = xlgmac_config_rsf_mode;
+ hw_ops->config_tsf_mode = xlgmac_config_tsf_mode;
+
+ /* For TX DMA Operating on Second Frame config */
+ hw_ops->config_osp_mode = xlgmac_config_osp_mode;
+
+ /* For RX and TX PBL config */
+ hw_ops->config_rx_pbl_val = xlgmac_config_rx_pbl_val;
+ hw_ops->get_rx_pbl_val = xlgmac_get_rx_pbl_val;
+ hw_ops->config_tx_pbl_val = xlgmac_config_tx_pbl_val;
+ hw_ops->get_tx_pbl_val = xlgmac_get_tx_pbl_val;
+ hw_ops->config_pblx8 = xlgmac_config_pblx8;
+
+ /* For MMC statistics support */
+ hw_ops->tx_mmc_int = xlgmac_tx_mmc_int;
+ hw_ops->rx_mmc_int = xlgmac_rx_mmc_int;
+ hw_ops->read_mmc_stats = xlgmac_read_mmc_stats;
+
+ /* For Receive Side Scaling */
+ hw_ops->enable_rss = xlgmac_enable_rss;
+ hw_ops->disable_rss = xlgmac_disable_rss;
+ hw_ops->set_rss_hash_key = xlgmac_set_rss_hash_key;
+ hw_ops->set_rss_lookup_table = xlgmac_set_rss_lookup_table;
+}
--- /dev/null
+/* Synopsys DesignWare Core Enterprise Ethernet (XLGMAC) Driver
+ *
+ * Copyright (c) 2017 Synopsys, Inc. (www.synopsys.com)
+ *
+ * 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; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This Synopsys DWC XLGMAC software driver and associated documentation
+ * (hereinafter the "Software") is an unsupported proprietary work of
+ * Synopsys, Inc. unless otherwise expressly agreed to in writing between
+ * Synopsys and you. The Software IS NOT an item of Licensed Software or a
+ * Licensed Product under any End User Software License Agreement or
+ * Agreement for Licensed Products with Synopsys or any supplement thereto.
+ * Synopsys is a registered trademark of Synopsys, Inc. Other names included
+ * in the SOFTWARE may be the trademarks of their respective owners.
+ */
+
+#include <linux/netdevice.h>
+#include <linux/tcp.h>
+
+#include "dwc-xlgmac.h"
+#include "dwc-xlgmac-reg.h"
+
+static int xlgmac_one_poll(struct napi_struct *, int);
+static int xlgmac_all_poll(struct napi_struct *, int);
+
+static inline unsigned int xlgmac_tx_avail_desc(struct xlgmac_ring *ring)
+{
+ return (ring->dma_desc_count - (ring->cur - ring->dirty));
+}
+
+static inline unsigned int xlgmac_rx_dirty_desc(struct xlgmac_ring *ring)
+{
+ return (ring->cur - ring->dirty);
+}
+
+static int xlgmac_maybe_stop_tx_queue(
+ struct xlgmac_channel *channel,
+ struct xlgmac_ring *ring,
+ unsigned int count)
+{
+ struct xlgmac_pdata *pdata = channel->pdata;
+
+ if (count > xlgmac_tx_avail_desc(ring)) {
+ netif_info(pdata, drv, pdata->netdev,
+ "Tx queue stopped, not enough descriptors available\n");
+ netif_stop_subqueue(pdata->netdev, channel->queue_index);
+ ring->tx.queue_stopped = 1;
+
+ /* If we haven't notified the hardware because of xmit_more
+ * support, tell it now
+ */
+ if (ring->tx.xmit_more)
+ pdata->hw_ops.tx_start_xmit(channel, ring);
+
+ return NETDEV_TX_BUSY;
+ }
+
+ return 0;
+}
+
+static void xlgmac_prep_vlan(struct sk_buff *skb,
+ struct xlgmac_pkt_info *pkt_info)
+{
+ if (skb_vlan_tag_present(skb))
+ pkt_info->vlan_ctag = skb_vlan_tag_get(skb);
+}
+
+static int xlgmac_prep_tso(struct sk_buff *skb,
+ struct xlgmac_pkt_info *pkt_info)
+{
+ int ret;
+
+ if (!XLGMAC_GET_REG_BITS(pkt_info->attributes,
+ TX_PACKET_ATTRIBUTES_TSO_ENABLE_POS,
+ TX_PACKET_ATTRIBUTES_TSO_ENABLE_LEN))
+ return 0;
+
+ ret = skb_cow_head(skb, 0);
+ if (ret)
+ return ret;
+
+ pkt_info->header_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+ pkt_info->tcp_header_len = tcp_hdrlen(skb);
+ pkt_info->tcp_payload_len = skb->len - pkt_info->header_len;
+ pkt_info->mss = skb_shinfo(skb)->gso_size;
+
+ XLGMAC_PR("header_len=%u\n", pkt_info->header_len);
+ XLGMAC_PR("tcp_header_len=%u, tcp_payload_len=%u\n",
+ pkt_info->tcp_header_len, pkt_info->tcp_payload_len);
+ XLGMAC_PR("mss=%u\n", pkt_info->mss);
+
+ /* Update the number of packets that will ultimately be transmitted
+ * along with the extra bytes for each extra packet
+ */
+ pkt_info->tx_packets = skb_shinfo(skb)->gso_segs;
+ pkt_info->tx_bytes += (pkt_info->tx_packets - 1) * pkt_info->header_len;
+
+ return 0;
+}
+
+static int xlgmac_is_tso(struct sk_buff *skb)
+{
+ if (skb->ip_summed != CHECKSUM_PARTIAL)
+ return 0;
+
+ if (!skb_is_gso(skb))
+ return 0;
+
+ return 1;
+}
+
+static void xlgmac_prep_tx_pkt(struct xlgmac_pdata *pdata,
+ struct xlgmac_ring *ring,
+ struct sk_buff *skb,
+ struct xlgmac_pkt_info *pkt_info)
+{
+ struct skb_frag_struct *frag;
+ unsigned int context_desc;
+ unsigned int len;
+ unsigned int i;
+
+ pkt_info->skb = skb;
+
+ context_desc = 0;
+ pkt_info->desc_count = 0;
+
+ pkt_info->tx_packets = 1;
+ pkt_info->tx_bytes = skb->len;
+
+ if (xlgmac_is_tso(skb)) {
+ /* TSO requires an extra descriptor if mss is different */
+ if (skb_shinfo(skb)->gso_size != ring->tx.cur_mss) {
+ context_desc = 1;
+ pkt_info->desc_count++;
+ }
+
+ /* TSO requires an extra descriptor for TSO header */
+ pkt_info->desc_count++;
+
+ pkt_info->attributes = XLGMAC_SET_REG_BITS(
+ pkt_info->attributes,
+ TX_PACKET_ATTRIBUTES_TSO_ENABLE_POS,
+ TX_PACKET_ATTRIBUTES_TSO_ENABLE_LEN,
+ 1);
+ pkt_info->attributes = XLGMAC_SET_REG_BITS(
+ pkt_info->attributes,
+ TX_PACKET_ATTRIBUTES_CSUM_ENABLE_POS,
+ TX_PACKET_ATTRIBUTES_CSUM_ENABLE_LEN,
+ 1);
+ } else if (skb->ip_summed == CHECKSUM_PARTIAL)
+ pkt_info->attributes = XLGMAC_SET_REG_BITS(
+ pkt_info->attributes,
+ TX_PACKET_ATTRIBUTES_CSUM_ENABLE_POS,
+ TX_PACKET_ATTRIBUTES_CSUM_ENABLE_LEN,
+ 1);
+
+ if (skb_vlan_tag_present(skb)) {
+ /* VLAN requires an extra descriptor if tag is different */
+ if (skb_vlan_tag_get(skb) != ring->tx.cur_vlan_ctag)
+ /* We can share with the TSO context descriptor */
+ if (!context_desc) {
+ context_desc = 1;
+ pkt_info->desc_count++;
+ }
+
+ pkt_info->attributes = XLGMAC_SET_REG_BITS(
+ pkt_info->attributes,
+ TX_PACKET_ATTRIBUTES_VLAN_CTAG_POS,
+ TX_PACKET_ATTRIBUTES_VLAN_CTAG_LEN,
+ 1);
+ }
+
+ for (len = skb_headlen(skb); len;) {
+ pkt_info->desc_count++;
+ len -= min_t(unsigned int, len, XLGMAC_TX_MAX_BUF_SIZE);
+ }
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ frag = &skb_shinfo(skb)->frags[i];
+ for (len = skb_frag_size(frag); len; ) {
+ pkt_info->desc_count++;
+ len -= min_t(unsigned int, len, XLGMAC_TX_MAX_BUF_SIZE);
+ }
+ }
+}
+
+static int xlgmac_calc_rx_buf_size(struct net_device *netdev, unsigned int mtu)
+{
+ unsigned int rx_buf_size;
+
+ if (mtu > XLGMAC_JUMBO_PACKET_MTU) {
+ netdev_alert(netdev, "MTU exceeds maximum supported value\n");
+ return -EINVAL;
+ }
+
+ rx_buf_size = mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
+ rx_buf_size = clamp_val(rx_buf_size, XLGMAC_RX_MIN_BUF_SIZE, PAGE_SIZE);
+
+ rx_buf_size = (rx_buf_size + XLGMAC_RX_BUF_ALIGN - 1) &
+ ~(XLGMAC_RX_BUF_ALIGN - 1);
+
+ return rx_buf_size;
+}
+
+static void xlgmac_enable_rx_tx_ints(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
+ struct xlgmac_channel *channel;
+ enum xlgmac_int int_id;
+ unsigned int i;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (channel->tx_ring && channel->rx_ring)
+ int_id = XLGMAC_INT_DMA_CH_SR_TI_RI;
+ else if (channel->tx_ring)
+ int_id = XLGMAC_INT_DMA_CH_SR_TI;
+ else if (channel->rx_ring)
+ int_id = XLGMAC_INT_DMA_CH_SR_RI;
+ else
+ continue;
+
+ hw_ops->enable_int(channel, int_id);
+ }
+}
+
+static void xlgmac_disable_rx_tx_ints(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
+ struct xlgmac_channel *channel;
+ enum xlgmac_int int_id;
+ unsigned int i;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (channel->tx_ring && channel->rx_ring)
+ int_id = XLGMAC_INT_DMA_CH_SR_TI_RI;
+ else if (channel->tx_ring)
+ int_id = XLGMAC_INT_DMA_CH_SR_TI;
+ else if (channel->rx_ring)
+ int_id = XLGMAC_INT_DMA_CH_SR_RI;
+ else
+ continue;
+
+ hw_ops->disable_int(channel, int_id);
+ }
+}
+
+static irqreturn_t xlgmac_isr(int irq, void *data)
+{
+ unsigned int dma_isr, dma_ch_isr, mac_isr;
+ struct xlgmac_pdata *pdata = data;
+ struct xlgmac_channel *channel;
+ struct xlgmac_hw_ops *hw_ops;
+ unsigned int i, ti, ri;
+
+ hw_ops = &pdata->hw_ops;
+
+ /* The DMA interrupt status register also reports MAC and MTL
+ * interrupts. So for polling mode, we just need to check for
+ * this register to be non-zero
+ */
+ dma_isr = readl(pdata->mac_regs + DMA_ISR);
+ if (!dma_isr)
+ return IRQ_HANDLED;
+
+ netif_dbg(pdata, intr, pdata->netdev, "DMA_ISR=%#010x\n", dma_isr);
+
+ for (i = 0; i < pdata->channel_count; i++) {
+ if (!(dma_isr & (1 << i)))
+ continue;
+
+ channel = pdata->channel_head + i;
+
+ dma_ch_isr = readl(XLGMAC_DMA_REG(channel, DMA_CH_SR));
+ netif_dbg(pdata, intr, pdata->netdev, "DMA_CH%u_ISR=%#010x\n",
+ i, dma_ch_isr);
+
+ /* The TI or RI interrupt bits may still be set even if using
+ * per channel DMA interrupts. Check to be sure those are not
+ * enabled before using the private data napi structure.
+ */
+ ti = XLGMAC_GET_REG_BITS(dma_ch_isr, DMA_CH_SR_TI_POS,
+ DMA_CH_SR_TI_LEN);
+ ri = XLGMAC_GET_REG_BITS(dma_ch_isr, DMA_CH_SR_RI_POS,
+ DMA_CH_SR_RI_LEN);
+ if (!pdata->per_channel_irq && (ti || ri)) {
+ if (napi_schedule_prep(&pdata->napi)) {
+ /* Disable Tx and Rx interrupts */
+ xlgmac_disable_rx_tx_ints(pdata);
+
+ /* Turn on polling */
+ __napi_schedule_irqoff(&pdata->napi);
+ }
+ }
+
+ if (XLGMAC_GET_REG_BITS(dma_ch_isr, DMA_CH_SR_RBU_POS,
+ DMA_CH_SR_RBU_LEN))
+ pdata->stats.rx_buffer_unavailable++;
+
+ /* Restart the device on a Fatal Bus Error */
+ if (XLGMAC_GET_REG_BITS(dma_ch_isr, DMA_CH_SR_FBE_POS,
+ DMA_CH_SR_FBE_LEN))
+ schedule_work(&pdata->restart_work);
+
+ /* Clear all interrupt signals */
+ writel(dma_ch_isr, XLGMAC_DMA_REG(channel, DMA_CH_SR));
+ }
+
+ if (XLGMAC_GET_REG_BITS(dma_isr, DMA_ISR_MACIS_POS,
+ DMA_ISR_MACIS_LEN)) {
+ mac_isr = readl(pdata->mac_regs + MAC_ISR);
+
+ if (XLGMAC_GET_REG_BITS(mac_isr, MAC_ISR_MMCTXIS_POS,
+ MAC_ISR_MMCTXIS_LEN))
+ hw_ops->tx_mmc_int(pdata);
+
+ if (XLGMAC_GET_REG_BITS(mac_isr, MAC_ISR_MMCRXIS_POS,
+ MAC_ISR_MMCRXIS_LEN))
+ hw_ops->rx_mmc_int(pdata);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t xlgmac_dma_isr(int irq, void *data)
+{
+ struct xlgmac_channel *channel = data;
+
+ /* Per channel DMA interrupts are enabled, so we use the per
+ * channel napi structure and not the private data napi structure
+ */
+ if (napi_schedule_prep(&channel->napi)) {
+ /* Disable Tx and Rx interrupts */
+ disable_irq_nosync(channel->dma_irq);
+
+ /* Turn on polling */
+ __napi_schedule_irqoff(&channel->napi);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static void xlgmac_tx_timer(unsigned long data)
+{
+ struct xlgmac_channel *channel = (struct xlgmac_channel *)data;
+ struct xlgmac_pdata *pdata = channel->pdata;
+ struct napi_struct *napi;
+
+ napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi;
+
+ if (napi_schedule_prep(napi)) {
+ /* Disable Tx and Rx interrupts */
+ if (pdata->per_channel_irq)
+ disable_irq_nosync(channel->dma_irq);
+ else
+ xlgmac_disable_rx_tx_ints(pdata);
+
+ /* Turn on polling */
+ __napi_schedule(napi);
+ }
+
+ channel->tx_timer_active = 0;
+}
+
+static void xlgmac_init_timers(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (!channel->tx_ring)
+ break;
+
+ setup_timer(&channel->tx_timer, xlgmac_tx_timer,
+ (unsigned long)channel);
+ }
+}
+
+static void xlgmac_stop_timers(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (!channel->tx_ring)
+ break;
+
+ del_timer_sync(&channel->tx_timer);
+ }
+}
+
+static void xlgmac_napi_enable(struct xlgmac_pdata *pdata, unsigned int add)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+
+ if (pdata->per_channel_irq) {
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (add)
+ netif_napi_add(pdata->netdev, &channel->napi,
+ xlgmac_one_poll,
+ NAPI_POLL_WEIGHT);
+
+ napi_enable(&channel->napi);
+ }
+ } else {
+ if (add)
+ netif_napi_add(pdata->netdev, &pdata->napi,
+ xlgmac_all_poll, NAPI_POLL_WEIGHT);
+
+ napi_enable(&pdata->napi);
+ }
+}
+
+static void xlgmac_napi_disable(struct xlgmac_pdata *pdata, unsigned int del)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+
+ if (pdata->per_channel_irq) {
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ napi_disable(&channel->napi);
+
+ if (del)
+ netif_napi_del(&channel->napi);
+ }
+ } else {
+ napi_disable(&pdata->napi);
+
+ if (del)
+ netif_napi_del(&pdata->napi);
+ }
+}
+
+static int xlgmac_request_irqs(struct xlgmac_pdata *pdata)
+{
+ struct net_device *netdev = pdata->netdev;
+ struct xlgmac_channel *channel;
+ unsigned int i;
+ int ret;
+
+ ret = devm_request_irq(pdata->dev, pdata->dev_irq, xlgmac_isr,
+ IRQF_SHARED, netdev->name, pdata);
+ if (ret) {
+ netdev_alert(netdev, "error requesting irq %d\n",
+ pdata->dev_irq);
+ return ret;
+ }
+
+ if (!pdata->per_channel_irq)
+ return 0;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ snprintf(channel->dma_irq_name,
+ sizeof(channel->dma_irq_name) - 1,
+ "%s-TxRx-%u", netdev_name(netdev),
+ channel->queue_index);
+
+ ret = devm_request_irq(pdata->dev, channel->dma_irq,
+ xlgmac_dma_isr, 0,
+ channel->dma_irq_name, channel);
+ if (ret) {
+ netdev_alert(netdev, "error requesting irq %d\n",
+ channel->dma_irq);
+ goto err_irq;
+ }
+ }
+
+ return 0;
+
+err_irq:
+ /* Using an unsigned int, 'i' will go to UINT_MAX and exit */
+ for (i--, channel--; i < pdata->channel_count; i--, channel--)
+ devm_free_irq(pdata->dev, channel->dma_irq, channel);
+
+ devm_free_irq(pdata->dev, pdata->dev_irq, pdata);
+
+ return ret;
+}
+
+static void xlgmac_free_irqs(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_channel *channel;
+ unsigned int i;
+
+ devm_free_irq(pdata->dev, pdata->dev_irq, pdata);
+
+ if (!pdata->per_channel_irq)
+ return;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++)
+ devm_free_irq(pdata->dev, channel->dma_irq, channel);
+}
+
+static void xlgmac_free_tx_data(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_desc_ops *desc_ops = &pdata->desc_ops;
+ struct xlgmac_desc_data *desc_data;
+ struct xlgmac_channel *channel;
+ struct xlgmac_ring *ring;
+ unsigned int i, j;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ ring = channel->tx_ring;
+ if (!ring)
+ break;
+
+ for (j = 0; j < ring->dma_desc_count; j++) {
+ desc_data = XLGMAC_GET_DESC_DATA(ring, j);
+ desc_ops->unmap_desc_data(pdata, desc_data);
+ }
+ }
+}
+
+static void xlgmac_free_rx_data(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_desc_ops *desc_ops = &pdata->desc_ops;
+ struct xlgmac_desc_data *desc_data;
+ struct xlgmac_channel *channel;
+ struct xlgmac_ring *ring;
+ unsigned int i, j;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ ring = channel->rx_ring;
+ if (!ring)
+ break;
+
+ for (j = 0; j < ring->dma_desc_count; j++) {
+ desc_data = XLGMAC_GET_DESC_DATA(ring, j);
+ desc_ops->unmap_desc_data(pdata, desc_data);
+ }
+ }
+}
+
+static int xlgmac_start(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
+ struct net_device *netdev = pdata->netdev;
+ int ret;
+
+ hw_ops->init(pdata);
+ xlgmac_napi_enable(pdata, 1);
+
+ ret = xlgmac_request_irqs(pdata);
+ if (ret)
+ goto err_napi;
+
+ hw_ops->enable_tx(pdata);
+ hw_ops->enable_rx(pdata);
+ netif_tx_start_all_queues(netdev);
+
+ return 0;
+
+err_napi:
+ xlgmac_napi_disable(pdata, 1);
+ hw_ops->exit(pdata);
+
+ return ret;
+}
+
+static void xlgmac_stop(struct xlgmac_pdata *pdata)
+{
+ struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
+ struct net_device *netdev = pdata->netdev;
+ struct xlgmac_channel *channel;
+ struct netdev_queue *txq;
+ unsigned int i;
+
+ netif_tx_stop_all_queues(netdev);
+ xlgmac_stop_timers(pdata);
+ hw_ops->disable_tx(pdata);
+ hw_ops->disable_rx(pdata);
+ xlgmac_free_irqs(pdata);
+ xlgmac_napi_disable(pdata, 1);
+ hw_ops->exit(pdata);
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ if (!channel->tx_ring)
+ continue;
+
+ txq = netdev_get_tx_queue(netdev, channel->queue_index);
+ netdev_tx_reset_queue(txq);
+ }
+}
+
+static void xlgmac_restart_dev(struct xlgmac_pdata *pdata)
+{
+ /* If not running, "restart" will happen on open */
+ if (!netif_running(pdata->netdev))
+ return;
+
+ xlgmac_stop(pdata);
+
+ xlgmac_free_tx_data(pdata);
+ xlgmac_free_rx_data(pdata);
+
+ xlgmac_start(pdata);
+}
+
+static void xlgmac_restart(struct work_struct *work)
+{
+ struct xlgmac_pdata *pdata = container_of(work,
+ struct xlgmac_pdata,
+ restart_work);
+
+ rtnl_lock();
+
+ xlgmac_restart_dev(pdata);
+
+ rtnl_unlock();
+}
+
+static int xlgmac_open(struct net_device *netdev)
+{
+ struct xlgmac_pdata *pdata = netdev_priv(netdev);
+ struct xlgmac_desc_ops *desc_ops;
+ int ret;
+
+ desc_ops = &pdata->desc_ops;
+
+ /* TODO: Initialize the phy */
+
+ /* Calculate the Rx buffer size before allocating rings */
+ ret = xlgmac_calc_rx_buf_size(netdev, netdev->mtu);
+ if (ret < 0)
+ return ret;
+ pdata->rx_buf_size = ret;
+
+ /* Allocate the channels and rings */
+ ret = desc_ops->alloc_channles_and_rings(pdata);
+ if (ret)
+ return ret;
+
+ INIT_WORK(&pdata->restart_work, xlgmac_restart);
+ xlgmac_init_timers(pdata);
+
+ ret = xlgmac_start(pdata);
+ if (ret)
+ goto err_channels_and_rings;
+
+ return 0;
+
+err_channels_and_rings:
+ desc_ops->free_channels_and_rings(pdata);
+
+ return ret;
+}
+
+static int xlgmac_close(struct net_device *netdev)
+{
+ struct xlgmac_pdata *pdata = netdev_priv(netdev);
+ struct xlgmac_desc_ops *desc_ops;
+
+ desc_ops = &pdata->desc_ops;
+
+ /* Stop the device */
+ xlgmac_stop(pdata);
+
+ /* Free the channels and rings */
+ desc_ops->free_channels_and_rings(pdata);
+
+ return 0;
+}
+
+static void xlgmac_tx_timeout(struct net_device *netdev)
+{
+ struct xlgmac_pdata *pdata = netdev_priv(netdev);
+
+ netdev_warn(netdev, "tx timeout, device restarting\n");
+ schedule_work(&pdata->restart_work);
+}
+
+static int xlgmac_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+ struct xlgmac_pdata *pdata = netdev_priv(netdev);
+ struct xlgmac_pkt_info *tx_pkt_info;
+ struct xlgmac_desc_ops *desc_ops;
+ struct xlgmac_channel *channel;
+ struct xlgmac_hw_ops *hw_ops;
+ struct netdev_queue *txq;
+ struct xlgmac_ring *ring;
+ int ret;
+
+ desc_ops = &pdata->desc_ops;
+ hw_ops = &pdata->hw_ops;
+
+ XLGMAC_PR("skb->len = %d\n", skb->len);
+
+ channel = pdata->channel_head + skb->queue_mapping;
+ txq = netdev_get_tx_queue(netdev, channel->queue_index);
+ ring = channel->tx_ring;
+ tx_pkt_info = &ring->pkt_info;
+
+ if (skb->len == 0) {
+ netif_err(pdata, tx_err, netdev,
+ "empty skb received from stack\n");
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+ }
+
+ /* Prepare preliminary packet info for TX */
+ memset(tx_pkt_info, 0, sizeof(*tx_pkt_info));
+ xlgmac_prep_tx_pkt(pdata, ring, skb, tx_pkt_info);
+
+ /* Check that there are enough descriptors available */
+ ret = xlgmac_maybe_stop_tx_queue(channel, ring,
+ tx_pkt_info->desc_count);
+ if (ret)
+ return ret;
+
+ ret = xlgmac_prep_tso(skb, tx_pkt_info);
+ if (ret) {
+ netif_err(pdata, tx_err, netdev,
+ "error processing TSO packet\n");
+ dev_kfree_skb_any(skb);
+ return ret;
+ }
+ xlgmac_prep_vlan(skb, tx_pkt_info);
+
+ if (!desc_ops->map_tx_skb(channel, skb)) {
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+ }
+
+ /* Report on the actual number of bytes (to be) sent */
+ netdev_tx_sent_queue(txq, tx_pkt_info->tx_bytes);
+
+ /* Configure required descriptor fields for transmission */
+ hw_ops->dev_xmit(channel);
+
+ if (netif_msg_pktdata(pdata))
+ xlgmac_print_pkt(netdev, skb, true);
+
+ /* Stop the queue in advance if there may not be enough descriptors */
+ xlgmac_maybe_stop_tx_queue(channel, ring, XLGMAC_TX_MAX_DESC_NR);
+
+ return NETDEV_TX_OK;
+}
+
+static void xlgmac_get_stats64(struct net_device *netdev,
+ struct rtnl_link_stats64 *s)
+{
+ struct xlgmac_pdata *pdata = netdev_priv(netdev);
+ struct xlgmac_stats *pstats = &pdata->stats;
+
+ pdata->hw_ops.read_mmc_stats(pdata);
+
+ s->rx_packets = pstats->rxframecount_gb;
+ s->rx_bytes = pstats->rxoctetcount_gb;
+ s->rx_errors = pstats->rxframecount_gb -
+ pstats->rxbroadcastframes_g -
+ pstats->rxmulticastframes_g -
+ pstats->rxunicastframes_g;
+ s->multicast = pstats->rxmulticastframes_g;
+ s->rx_length_errors = pstats->rxlengtherror;
+ s->rx_crc_errors = pstats->rxcrcerror;
+ s->rx_fifo_errors = pstats->rxfifooverflow;
+
+ s->tx_packets = pstats->txframecount_gb;
+ s->tx_bytes = pstats->txoctetcount_gb;
+ s->tx_errors = pstats->txframecount_gb - pstats->txframecount_g;
+ s->tx_dropped = netdev->stats.tx_dropped;
+}
+
+static int xlgmac_set_mac_address(struct net_device *netdev, void *addr)
+{
+ struct xlgmac_pdata *pdata = netdev_priv(netdev);
+ struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
+ struct sockaddr *saddr = addr;
+
+ if (!is_valid_ether_addr(saddr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ memcpy(netdev->dev_addr, saddr->sa_data, netdev->addr_len);
+
+ hw_ops->set_mac_address(pdata, netdev->dev_addr);
+
+ return 0;
+}
+
+static int xlgmac_ioctl(struct net_device *netdev,
+ struct ifreq *ifreq, int cmd)
+{
+ if (!netif_running(netdev))
+ return -ENODEV;
+
+ return 0;
+}
+
+static int xlgmac_change_mtu(struct net_device *netdev, int mtu)
+{
+ struct xlgmac_pdata *pdata = netdev_priv(netdev);
+ int ret;
+
+ ret = xlgmac_calc_rx_buf_size(netdev, mtu);
+ if (ret < 0)
+ return ret;
+
+ pdata->rx_buf_size = ret;
+ netdev->mtu = mtu;
+
+ xlgmac_restart_dev(pdata);
+
+ return 0;
+}
+
+static int xlgmac_vlan_rx_add_vid(struct net_device *netdev,
+ __be16 proto,
+ u16 vid)
+{
+ struct xlgmac_pdata *pdata = netdev_priv(netdev);
+ struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
+
+ set_bit(vid, pdata->active_vlans);
+ hw_ops->update_vlan_hash_table(pdata);
+
+ return 0;
+}
+
+static int xlgmac_vlan_rx_kill_vid(struct net_device *netdev,
+ __be16 proto,
+ u16 vid)
+{
+ struct xlgmac_pdata *pdata = netdev_priv(netdev);
+ struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
+
+ clear_bit(vid, pdata->active_vlans);
+ hw_ops->update_vlan_hash_table(pdata);
+
+ return 0;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void xlgmac_poll_controller(struct net_device *netdev)
+{
+ struct xlgmac_pdata *pdata = netdev_priv(netdev);
+ struct xlgmac_channel *channel;
+ unsigned int i;
+
+ if (pdata->per_channel_irq) {
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++)
+ xlgmac_dma_isr(channel->dma_irq, channel);
+ } else {
+ disable_irq(pdata->dev_irq);
+ xlgmac_isr(pdata->dev_irq, pdata);
+ enable_irq(pdata->dev_irq);
+ }
+}
+#endif /* CONFIG_NET_POLL_CONTROLLER */
+
+static int xlgmac_set_features(struct net_device *netdev,
+ netdev_features_t features)
+{
+ netdev_features_t rxhash, rxcsum, rxvlan, rxvlan_filter;
+ struct xlgmac_pdata *pdata = netdev_priv(netdev);
+ struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
+ int ret = 0;
+
+ rxhash = pdata->netdev_features & NETIF_F_RXHASH;
+ rxcsum = pdata->netdev_features & NETIF_F_RXCSUM;
+ rxvlan = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_RX;
+ rxvlan_filter = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_FILTER;
+
+ if ((features & NETIF_F_RXHASH) && !rxhash)
+ ret = hw_ops->enable_rss(pdata);
+ else if (!(features & NETIF_F_RXHASH) && rxhash)
+ ret = hw_ops->disable_rss(pdata);
+ if (ret)
+ return ret;
+
+ if ((features & NETIF_F_RXCSUM) && !rxcsum)
+ hw_ops->enable_rx_csum(pdata);
+ else if (!(features & NETIF_F_RXCSUM) && rxcsum)
+ hw_ops->disable_rx_csum(pdata);
+
+ if ((features & NETIF_F_HW_VLAN_CTAG_RX) && !rxvlan)
+ hw_ops->enable_rx_vlan_stripping(pdata);
+ else if (!(features & NETIF_F_HW_VLAN_CTAG_RX) && rxvlan)
+ hw_ops->disable_rx_vlan_stripping(pdata);
+
+ if ((features & NETIF_F_HW_VLAN_CTAG_FILTER) && !rxvlan_filter)
+ hw_ops->enable_rx_vlan_filtering(pdata);
+ else if (!(features & NETIF_F_HW_VLAN_CTAG_FILTER) && rxvlan_filter)
+ hw_ops->disable_rx_vlan_filtering(pdata);
+
+ pdata->netdev_features = features;
+
+ return 0;
+}
+
+static void xlgmac_set_rx_mode(struct net_device *netdev)
+{
+ struct xlgmac_pdata *pdata = netdev_priv(netdev);
+ struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
+
+ hw_ops->config_rx_mode(pdata);
+}
+
+static const struct net_device_ops xlgmac_netdev_ops = {
+ .ndo_open = xlgmac_open,
+ .ndo_stop = xlgmac_close,
+ .ndo_start_xmit = xlgmac_xmit,
+ .ndo_tx_timeout = xlgmac_tx_timeout,
+ .ndo_get_stats64 = xlgmac_get_stats64,
+ .ndo_change_mtu = xlgmac_change_mtu,
+ .ndo_set_mac_address = xlgmac_set_mac_address,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_do_ioctl = xlgmac_ioctl,
+ .ndo_vlan_rx_add_vid = xlgmac_vlan_rx_add_vid,
+ .ndo_vlan_rx_kill_vid = xlgmac_vlan_rx_kill_vid,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = xlgmac_poll_controller,
+#endif
+ .ndo_set_features = xlgmac_set_features,
+ .ndo_set_rx_mode = xlgmac_set_rx_mode,
+};
+
+const struct net_device_ops *xlgmac_get_netdev_ops(void)
+{
+ return &xlgmac_netdev_ops;
+}
+
+static void xlgmac_rx_refresh(struct xlgmac_channel *channel)
+{
+ struct xlgmac_pdata *pdata = channel->pdata;
+ struct xlgmac_ring *ring = channel->rx_ring;
+ struct xlgmac_desc_data *desc_data;
+ struct xlgmac_desc_ops *desc_ops;
+ struct xlgmac_hw_ops *hw_ops;
+
+ desc_ops = &pdata->desc_ops;
+ hw_ops = &pdata->hw_ops;
+
+ while (ring->dirty != ring->cur) {
+ desc_data = XLGMAC_GET_DESC_DATA(ring, ring->dirty);
+
+ /* Reset desc_data values */
+ desc_ops->unmap_desc_data(pdata, desc_data);
+
+ if (desc_ops->map_rx_buffer(pdata, ring, desc_data))
+ break;
+
+ hw_ops->rx_desc_reset(pdata, desc_data, ring->dirty);
+
+ ring->dirty++;
+ }
+
+ /* Make sure everything is written before the register write */
+ wmb();
+
+ /* Update the Rx Tail Pointer Register with address of
+ * the last cleaned entry
+ */
+ desc_data = XLGMAC_GET_DESC_DATA(ring, ring->dirty - 1);
+ writel(lower_32_bits(desc_data->dma_desc_addr),
+ XLGMAC_DMA_REG(channel, DMA_CH_RDTR_LO));
+}
+
+static struct sk_buff *xlgmac_create_skb(struct xlgmac_pdata *pdata,
+ struct napi_struct *napi,
+ struct xlgmac_desc_data *desc_data,
+ unsigned int len)
+{
+ unsigned int copy_len;
+ struct sk_buff *skb;
+ u8 *packet;
+
+ skb = napi_alloc_skb(napi, desc_data->rx.hdr.dma_len);
+ if (!skb)
+ return NULL;
+
+ /* Start with the header buffer which may contain just the header
+ * or the header plus data
+ */
+ dma_sync_single_range_for_cpu(pdata->dev, desc_data->rx.hdr.dma_base,
+ desc_data->rx.hdr.dma_off,
+ desc_data->rx.hdr.dma_len,
+ DMA_FROM_DEVICE);
+
+ packet = page_address(desc_data->rx.hdr.pa.pages) +
+ desc_data->rx.hdr.pa.pages_offset;
+ copy_len = (desc_data->rx.hdr_len) ? desc_data->rx.hdr_len : len;
+ copy_len = min(desc_data->rx.hdr.dma_len, copy_len);
+ skb_copy_to_linear_data(skb, packet, copy_len);
+ skb_put(skb, copy_len);
+
+ len -= copy_len;
+ if (len) {
+ /* Add the remaining data as a frag */
+ dma_sync_single_range_for_cpu(pdata->dev,
+ desc_data->rx.buf.dma_base,
+ desc_data->rx.buf.dma_off,
+ desc_data->rx.buf.dma_len,
+ DMA_FROM_DEVICE);
+
+ skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
+ desc_data->rx.buf.pa.pages,
+ desc_data->rx.buf.pa.pages_offset,
+ len, desc_data->rx.buf.dma_len);
+ desc_data->rx.buf.pa.pages = NULL;
+ }
+
+ return skb;
+}
+
+static int xlgmac_tx_poll(struct xlgmac_channel *channel)
+{
+ struct xlgmac_pdata *pdata = channel->pdata;
+ struct xlgmac_ring *ring = channel->tx_ring;
+ struct net_device *netdev = pdata->netdev;
+ unsigned int tx_packets = 0, tx_bytes = 0;
+ struct xlgmac_desc_data *desc_data;
+ struct xlgmac_dma_desc *dma_desc;
+ struct xlgmac_desc_ops *desc_ops;
+ struct xlgmac_hw_ops *hw_ops;
+ struct netdev_queue *txq;
+ int processed = 0;
+ unsigned int cur;
+
+ desc_ops = &pdata->desc_ops;
+ hw_ops = &pdata->hw_ops;
+
+ /* Nothing to do if there isn't a Tx ring for this channel */
+ if (!ring)
+ return 0;
+
+ cur = ring->cur;
+
+ /* Be sure we get ring->cur before accessing descriptor data */
+ smp_rmb();
+
+ txq = netdev_get_tx_queue(netdev, channel->queue_index);
+
+ while ((processed < XLGMAC_TX_DESC_MAX_PROC) &&
+ (ring->dirty != cur)) {
+ desc_data = XLGMAC_GET_DESC_DATA(ring, ring->dirty);
+ dma_desc = desc_data->dma_desc;
+
+ if (!hw_ops->tx_complete(dma_desc))
+ break;
+
+ /* Make sure descriptor fields are read after reading
+ * the OWN bit
+ */
+ dma_rmb();
+
+ if (netif_msg_tx_done(pdata))
+ xlgmac_dump_tx_desc(pdata, ring, ring->dirty, 1, 0);
+
+ if (hw_ops->is_last_desc(dma_desc)) {
+ tx_packets += desc_data->tx.packets;
+ tx_bytes += desc_data->tx.bytes;
+ }
+
+ /* Free the SKB and reset the descriptor for re-use */
+ desc_ops->unmap_desc_data(pdata, desc_data);
+ hw_ops->tx_desc_reset(desc_data);
+
+ processed++;
+ ring->dirty++;
+ }
+
+ if (!processed)
+ return 0;
+
+ netdev_tx_completed_queue(txq, tx_packets, tx_bytes);
+
+ if ((ring->tx.queue_stopped == 1) &&
+ (xlgmac_tx_avail_desc(ring) > XLGMAC_TX_DESC_MIN_FREE)) {
+ ring->tx.queue_stopped = 0;
+ netif_tx_wake_queue(txq);
+ }
+
+ XLGMAC_PR("processed=%d\n", processed);
+
+ return processed;
+}
+
+static int xlgmac_rx_poll(struct xlgmac_channel *channel, int budget)
+{
+ struct xlgmac_pdata *pdata = channel->pdata;
+ struct xlgmac_ring *ring = channel->rx_ring;
+ struct net_device *netdev = pdata->netdev;
+ unsigned int len, dma_desc_len, max_len;
+ unsigned int context_next, context;
+ struct xlgmac_desc_data *desc_data;
+ struct xlgmac_pkt_info *pkt_info;
+ unsigned int incomplete, error;
+ struct xlgmac_hw_ops *hw_ops;
+ unsigned int received = 0;
+ struct napi_struct *napi;
+ struct sk_buff *skb;
+ int packet_count = 0;
+
+ hw_ops = &pdata->hw_ops;
+
+ /* Nothing to do if there isn't a Rx ring for this channel */
+ if (!ring)
+ return 0;
+
+ incomplete = 0;
+ context_next = 0;
+
+ napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi;
+
+ desc_data = XLGMAC_GET_DESC_DATA(ring, ring->cur);
+ pkt_info = &ring->pkt_info;
+ while (packet_count < budget) {
+ /* First time in loop see if we need to restore state */
+ if (!received && desc_data->state_saved) {
+ skb = desc_data->state.skb;
+ error = desc_data->state.error;
+ len = desc_data->state.len;
+ } else {
+ memset(pkt_info, 0, sizeof(*pkt_info));
+ skb = NULL;
+ error = 0;
+ len = 0;
+ }
+
+read_again:
+ desc_data = XLGMAC_GET_DESC_DATA(ring, ring->cur);
+
+ if (xlgmac_rx_dirty_desc(ring) > XLGMAC_RX_DESC_MAX_DIRTY)
+ xlgmac_rx_refresh(channel);
+
+ if (hw_ops->dev_read(channel))
+ break;
+
+ received++;
+ ring->cur++;
+
+ incomplete = XLGMAC_GET_REG_BITS(
+ pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_INCOMPLETE_POS,
+ RX_PACKET_ATTRIBUTES_INCOMPLETE_LEN);
+ context_next = XLGMAC_GET_REG_BITS(
+ pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_CONTEXT_NEXT_POS,
+ RX_PACKET_ATTRIBUTES_CONTEXT_NEXT_LEN);
+ context = XLGMAC_GET_REG_BITS(
+ pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_CONTEXT_POS,
+ RX_PACKET_ATTRIBUTES_CONTEXT_LEN);
+
+ /* Earlier error, just drain the remaining data */
+ if ((incomplete || context_next) && error)
+ goto read_again;
+
+ if (error || pkt_info->errors) {
+ if (pkt_info->errors)
+ netif_err(pdata, rx_err, netdev,
+ "error in received packet\n");
+ dev_kfree_skb(skb);
+ goto next_packet;
+ }
+
+ if (!context) {
+ /* Length is cumulative, get this descriptor's length */
+ dma_desc_len = desc_data->rx.len - len;
+ len += dma_desc_len;
+
+ if (dma_desc_len && !skb) {
+ skb = xlgmac_create_skb(pdata, napi, desc_data,
+ dma_desc_len);
+ if (!skb)
+ error = 1;
+ } else if (dma_desc_len) {
+ dma_sync_single_range_for_cpu(
+ pdata->dev,
+ desc_data->rx.buf.dma_base,
+ desc_data->rx.buf.dma_off,
+ desc_data->rx.buf.dma_len,
+ DMA_FROM_DEVICE);
+
+ skb_add_rx_frag(
+ skb, skb_shinfo(skb)->nr_frags,
+ desc_data->rx.buf.pa.pages,
+ desc_data->rx.buf.pa.pages_offset,
+ dma_desc_len,
+ desc_data->rx.buf.dma_len);
+ desc_data->rx.buf.pa.pages = NULL;
+ }
+ }
+
+ if (incomplete || context_next)
+ goto read_again;
+
+ if (!skb)
+ goto next_packet;
+
+ /* Be sure we don't exceed the configured MTU */
+ max_len = netdev->mtu + ETH_HLEN;
+ if (!(netdev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
+ (skb->protocol == htons(ETH_P_8021Q)))
+ max_len += VLAN_HLEN;
+
+ if (skb->len > max_len) {
+ netif_err(pdata, rx_err, netdev,
+ "packet length exceeds configured MTU\n");
+ dev_kfree_skb(skb);
+ goto next_packet;
+ }
+
+ if (netif_msg_pktdata(pdata))
+ xlgmac_print_pkt(netdev, skb, false);
+
+ skb_checksum_none_assert(skb);
+ if (XLGMAC_GET_REG_BITS(pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_CSUM_DONE_POS,
+ RX_PACKET_ATTRIBUTES_CSUM_DONE_LEN))
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+ if (XLGMAC_GET_REG_BITS(pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_VLAN_CTAG_POS,
+ RX_PACKET_ATTRIBUTES_VLAN_CTAG_LEN))
+ __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
+ pkt_info->vlan_ctag);
+
+ if (XLGMAC_GET_REG_BITS(pkt_info->attributes,
+ RX_PACKET_ATTRIBUTES_RSS_HASH_POS,
+ RX_PACKET_ATTRIBUTES_RSS_HASH_LEN))
+ skb_set_hash(skb, pkt_info->rss_hash,
+ pkt_info->rss_hash_type);
+
+ skb->dev = netdev;
+ skb->protocol = eth_type_trans(skb, netdev);
+ skb_record_rx_queue(skb, channel->queue_index);
+
+ napi_gro_receive(napi, skb);
+
+next_packet:
+ packet_count++;
+ }
+
+ /* Check if we need to save state before leaving */
+ if (received && (incomplete || context_next)) {
+ desc_data = XLGMAC_GET_DESC_DATA(ring, ring->cur);
+ desc_data->state_saved = 1;
+ desc_data->state.skb = skb;
+ desc_data->state.len = len;
+ desc_data->state.error = error;
+ }
+
+ XLGMAC_PR("packet_count = %d\n", packet_count);
+
+ return packet_count;
+}
+
+static int xlgmac_one_poll(struct napi_struct *napi, int budget)
+{
+ struct xlgmac_channel *channel = container_of(napi,
+ struct xlgmac_channel,
+ napi);
+ int processed = 0;
+
+ XLGMAC_PR("budget=%d\n", budget);
+
+ /* Cleanup Tx ring first */
+ xlgmac_tx_poll(channel);
+
+ /* Process Rx ring next */
+ processed = xlgmac_rx_poll(channel, budget);
+
+ /* If we processed everything, we are done */
+ if (processed < budget) {
+ /* Turn off polling */
+ napi_complete_done(napi, processed);
+
+ /* Enable Tx and Rx interrupts */
+ enable_irq(channel->dma_irq);
+ }
+
+ XLGMAC_PR("received = %d\n", processed);
+
+ return processed;
+}
+
+static int xlgmac_all_poll(struct napi_struct *napi, int budget)
+{
+ struct xlgmac_pdata *pdata = container_of(napi,
+ struct xlgmac_pdata,
+ napi);
+ struct xlgmac_channel *channel;
+ int processed, last_processed;
+ int ring_budget;
+ unsigned int i;
+
+ XLGMAC_PR("budget=%d\n", budget);
+
+ processed = 0;
+ ring_budget = budget / pdata->rx_ring_count;
+ do {
+ last_processed = processed;
+
+ channel = pdata->channel_head;
+ for (i = 0; i < pdata->channel_count; i++, channel++) {
+ /* Cleanup Tx ring first */
+ xlgmac_tx_poll(channel);
+
+ /* Process Rx ring next */
+ if (ring_budget > (budget - processed))
+ ring_budget = budget - processed;
+ processed += xlgmac_rx_poll(channel, ring_budget);
+ }
+ } while ((processed < budget) && (processed != last_processed));
+
+ /* If we processed everything, we are done */
+ if (processed < budget) {
+ /* Turn off polling */
+ napi_complete_done(napi, processed);
+
+ /* Enable Tx and Rx interrupts */
+ xlgmac_enable_rx_tx_ints(pdata);
+ }
+
+ XLGMAC_PR("received = %d\n", processed);
+
+ return processed;
+}
--- /dev/null
+/* Synopsys DesignWare Core Enterprise Ethernet (XLGMAC) Driver
+ *
+ * Copyright (c) 2017 Synopsys, Inc. (www.synopsys.com)
+ *
+ * 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; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This Synopsys DWC XLGMAC software driver and associated documentation
+ * (hereinafter the "Software") is an unsupported proprietary work of
+ * Synopsys, Inc. unless otherwise expressly agreed to in writing between
+ * Synopsys and you. The Software IS NOT an item of Licensed Software or a
+ * Licensed Product under any End User Software License Agreement or
+ * Agreement for Licensed Products with Synopsys or any supplement thereto.
+ * Synopsys is a registered trademark of Synopsys, Inc. Other names included
+ * in the SOFTWARE may be the trademarks of their respective owners.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+
+#include "dwc-xlgmac.h"
+#include "dwc-xlgmac-reg.h"
+
+static int xlgmac_probe(struct pci_dev *pcidev, const struct pci_device_id *id)
+{
+ struct device *dev = &pcidev->dev;
+ struct xlgmac_resources res;
+ int i, ret;
+
+ ret = pcim_enable_device(pcidev);
+ if (ret) {
+ dev_err(dev, "ERROR: failed to enable device\n");
+ return ret;
+ }
+
+ for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
+ if (pci_resource_len(pcidev, i) == 0)
+ continue;
+ ret = pcim_iomap_regions(pcidev, BIT(i), XLGMAC_DRV_NAME);
+ if (ret)
+ return ret;
+ break;
+ }
+
+ pci_set_master(pcidev);
+
+ memset(&res, 0, sizeof(res));
+ res.irq = pcidev->irq;
+ res.addr = pcim_iomap_table(pcidev)[i];
+
+ return xlgmac_drv_probe(&pcidev->dev, &res);
+}
+
+static void xlgmac_remove(struct pci_dev *pcidev)
+{
+ xlgmac_drv_remove(&pcidev->dev);
+}
+
+static const struct pci_device_id xlgmac_pci_tbl[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 0x7302) },
+ { 0 }
+};
+MODULE_DEVICE_TABLE(pci, xlgmac_pci_tbl);
+
+static struct pci_driver xlgmac_pci_driver = {
+ .name = XLGMAC_DRV_NAME,
+ .id_table = xlgmac_pci_tbl,
+ .probe = xlgmac_probe,
+ .remove = xlgmac_remove,
+};
+
+module_pci_driver(xlgmac_pci_driver);
+
+MODULE_DESCRIPTION(XLGMAC_DRV_DESC);
+MODULE_VERSION(XLGMAC_DRV_VERSION);
+MODULE_AUTHOR("Jie Deng <jiedeng@synopsys.com>");
+MODULE_LICENSE("Dual BSD/GPL");
--- /dev/null
+/* Synopsys DesignWare Core Enterprise Ethernet (XLGMAC) Driver
+ *
+ * Copyright (c) 2017 Synopsys, Inc. (www.synopsys.com)
+ *
+ * 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; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This Synopsys DWC XLGMAC software driver and associated documentation
+ * (hereinafter the "Software") is an unsupported proprietary work of
+ * Synopsys, Inc. unless otherwise expressly agreed to in writing between
+ * Synopsys and you. The Software IS NOT an item of Licensed Software or a
+ * Licensed Product under any End User Software License Agreement or
+ * Agreement for Licensed Products with Synopsys or any supplement thereto.
+ * Synopsys is a registered trademark of Synopsys, Inc. Other names included
+ * in the SOFTWARE may be the trademarks of their respective owners.
+ */
+
+#ifndef __DWC_XLGMAC_REG_H__
+#define __DWC_XLGMAC_REG_H__
+
+/* MAC register offsets */
+#define MAC_TCR 0x0000
+#define MAC_RCR 0x0004
+#define MAC_PFR 0x0008
+#define MAC_HTR0 0x0010
+#define MAC_VLANTR 0x0050
+#define MAC_VLANHTR 0x0058
+#define MAC_VLANIR 0x0060
+#define MAC_Q0TFCR 0x0070
+#define MAC_RFCR 0x0090
+#define MAC_RQC0R 0x00a0
+#define MAC_RQC1R 0x00a4
+#define MAC_RQC2R 0x00a8
+#define MAC_RQC3R 0x00ac
+#define MAC_ISR 0x00b0
+#define MAC_IER 0x00b4
+#define MAC_VR 0x0110
+#define MAC_HWF0R 0x011c
+#define MAC_HWF1R 0x0120
+#define MAC_HWF2R 0x0124
+#define MAC_MACA0HR 0x0300
+#define MAC_MACA0LR 0x0304
+#define MAC_MACA1HR 0x0308
+#define MAC_MACA1LR 0x030c
+#define MAC_RSSCR 0x0c80
+#define MAC_RSSAR 0x0c88
+#define MAC_RSSDR 0x0c8c
+
+#define MAC_QTFCR_INC 4
+#define MAC_MACA_INC 4
+#define MAC_HTR_INC 4
+#define MAC_RQC2_INC 4
+#define MAC_RQC2_Q_PER_REG 4
+
+/* MAC register entry bit positions and sizes */
+#define MAC_HWF0R_ADDMACADRSEL_POS 18
+#define MAC_HWF0R_ADDMACADRSEL_LEN 5
+#define MAC_HWF0R_ARPOFFSEL_POS 9
+#define MAC_HWF0R_ARPOFFSEL_LEN 1
+#define MAC_HWF0R_EEESEL_POS 13
+#define MAC_HWF0R_EEESEL_LEN 1
+#define MAC_HWF0R_PHYIFSEL_POS 1
+#define MAC_HWF0R_PHYIFSEL_LEN 2
+#define MAC_HWF0R_MGKSEL_POS 7
+#define MAC_HWF0R_MGKSEL_LEN 1
+#define MAC_HWF0R_MMCSEL_POS 8
+#define MAC_HWF0R_MMCSEL_LEN 1
+#define MAC_HWF0R_RWKSEL_POS 6
+#define MAC_HWF0R_RWKSEL_LEN 1
+#define MAC_HWF0R_RXCOESEL_POS 16
+#define MAC_HWF0R_RXCOESEL_LEN 1
+#define MAC_HWF0R_SAVLANINS_POS 27
+#define MAC_HWF0R_SAVLANINS_LEN 1
+#define MAC_HWF0R_SMASEL_POS 5
+#define MAC_HWF0R_SMASEL_LEN 1
+#define MAC_HWF0R_TSSEL_POS 12
+#define MAC_HWF0R_TSSEL_LEN 1
+#define MAC_HWF0R_TSSTSSEL_POS 25
+#define MAC_HWF0R_TSSTSSEL_LEN 2
+#define MAC_HWF0R_TXCOESEL_POS 14
+#define MAC_HWF0R_TXCOESEL_LEN 1
+#define MAC_HWF0R_VLHASH_POS 4
+#define MAC_HWF0R_VLHASH_LEN 1
+#define MAC_HWF1R_ADDR64_POS 14
+#define MAC_HWF1R_ADDR64_LEN 2
+#define MAC_HWF1R_ADVTHWORD_POS 13
+#define MAC_HWF1R_ADVTHWORD_LEN 1
+#define MAC_HWF1R_DBGMEMA_POS 19
+#define MAC_HWF1R_DBGMEMA_LEN 1
+#define MAC_HWF1R_DCBEN_POS 16
+#define MAC_HWF1R_DCBEN_LEN 1
+#define MAC_HWF1R_HASHTBLSZ_POS 24
+#define MAC_HWF1R_HASHTBLSZ_LEN 3
+#define MAC_HWF1R_L3L4FNUM_POS 27
+#define MAC_HWF1R_L3L4FNUM_LEN 4
+#define MAC_HWF1R_NUMTC_POS 21
+#define MAC_HWF1R_NUMTC_LEN 3
+#define MAC_HWF1R_RSSEN_POS 20
+#define MAC_HWF1R_RSSEN_LEN 1
+#define MAC_HWF1R_RXFIFOSIZE_POS 0
+#define MAC_HWF1R_RXFIFOSIZE_LEN 5
+#define MAC_HWF1R_SPHEN_POS 17
+#define MAC_HWF1R_SPHEN_LEN 1
+#define MAC_HWF1R_TSOEN_POS 18
+#define MAC_HWF1R_TSOEN_LEN 1
+#define MAC_HWF1R_TXFIFOSIZE_POS 6
+#define MAC_HWF1R_TXFIFOSIZE_LEN 5
+#define MAC_HWF2R_AUXSNAPNUM_POS 28
+#define MAC_HWF2R_AUXSNAPNUM_LEN 3
+#define MAC_HWF2R_PPSOUTNUM_POS 24
+#define MAC_HWF2R_PPSOUTNUM_LEN 3
+#define MAC_HWF2R_RXCHCNT_POS 12
+#define MAC_HWF2R_RXCHCNT_LEN 4
+#define MAC_HWF2R_RXQCNT_POS 0
+#define MAC_HWF2R_RXQCNT_LEN 4
+#define MAC_HWF2R_TXCHCNT_POS 18
+#define MAC_HWF2R_TXCHCNT_LEN 4
+#define MAC_HWF2R_TXQCNT_POS 6
+#define MAC_HWF2R_TXQCNT_LEN 4
+#define MAC_IER_TSIE_POS 12
+#define MAC_IER_TSIE_LEN 1
+#define MAC_ISR_MMCRXIS_POS 9
+#define MAC_ISR_MMCRXIS_LEN 1
+#define MAC_ISR_MMCTXIS_POS 10
+#define MAC_ISR_MMCTXIS_LEN 1
+#define MAC_ISR_PMTIS_POS 4
+#define MAC_ISR_PMTIS_LEN 1
+#define MAC_ISR_TSIS_POS 12
+#define MAC_ISR_TSIS_LEN 1
+#define MAC_MACA1HR_AE_POS 31
+#define MAC_MACA1HR_AE_LEN 1
+#define MAC_PFR_HMC_POS 2
+#define MAC_PFR_HMC_LEN 1
+#define MAC_PFR_HPF_POS 10
+#define MAC_PFR_HPF_LEN 1
+#define MAC_PFR_HUC_POS 1
+#define MAC_PFR_HUC_LEN 1
+#define MAC_PFR_PM_POS 4
+#define MAC_PFR_PM_LEN 1
+#define MAC_PFR_PR_POS 0
+#define MAC_PFR_PR_LEN 1
+#define MAC_PFR_VTFE_POS 16
+#define MAC_PFR_VTFE_LEN 1
+#define MAC_Q0TFCR_PT_POS 16
+#define MAC_Q0TFCR_PT_LEN 16
+#define MAC_Q0TFCR_TFE_POS 1
+#define MAC_Q0TFCR_TFE_LEN 1
+#define MAC_RCR_ACS_POS 1
+#define MAC_RCR_ACS_LEN 1
+#define MAC_RCR_CST_POS 2
+#define MAC_RCR_CST_LEN 1
+#define MAC_RCR_DCRCC_POS 3
+#define MAC_RCR_DCRCC_LEN 1
+#define MAC_RCR_HDSMS_POS 12
+#define MAC_RCR_HDSMS_LEN 3
+#define MAC_RCR_IPC_POS 9
+#define MAC_RCR_IPC_LEN 1
+#define MAC_RCR_JE_POS 8
+#define MAC_RCR_JE_LEN 1
+#define MAC_RCR_LM_POS 10
+#define MAC_RCR_LM_LEN 1
+#define MAC_RCR_RE_POS 0
+#define MAC_RCR_RE_LEN 1
+#define MAC_RFCR_PFCE_POS 8
+#define MAC_RFCR_PFCE_LEN 1
+#define MAC_RFCR_RFE_POS 0
+#define MAC_RFCR_RFE_LEN 1
+#define MAC_RFCR_UP_POS 1
+#define MAC_RFCR_UP_LEN 1
+#define MAC_RQC0R_RXQ0EN_POS 0
+#define MAC_RQC0R_RXQ0EN_LEN 2
+#define MAC_RSSAR_ADDRT_POS 2
+#define MAC_RSSAR_ADDRT_LEN 1
+#define MAC_RSSAR_CT_POS 1
+#define MAC_RSSAR_CT_LEN 1
+#define MAC_RSSAR_OB_POS 0
+#define MAC_RSSAR_OB_LEN 1
+#define MAC_RSSAR_RSSIA_POS 8
+#define MAC_RSSAR_RSSIA_LEN 8
+#define MAC_RSSCR_IP2TE_POS 1
+#define MAC_RSSCR_IP2TE_LEN 1
+#define MAC_RSSCR_RSSE_POS 0
+#define MAC_RSSCR_RSSE_LEN 1
+#define MAC_RSSCR_TCP4TE_POS 2
+#define MAC_RSSCR_TCP4TE_LEN 1
+#define MAC_RSSCR_UDP4TE_POS 3
+#define MAC_RSSCR_UDP4TE_LEN 1
+#define MAC_RSSDR_DMCH_POS 0
+#define MAC_RSSDR_DMCH_LEN 4
+#define MAC_TCR_SS_POS 28
+#define MAC_TCR_SS_LEN 3
+#define MAC_TCR_TE_POS 0
+#define MAC_TCR_TE_LEN 1
+#define MAC_VLANHTR_VLHT_POS 0
+#define MAC_VLANHTR_VLHT_LEN 16
+#define MAC_VLANIR_VLTI_POS 20
+#define MAC_VLANIR_VLTI_LEN 1
+#define MAC_VLANIR_CSVL_POS 19
+#define MAC_VLANIR_CSVL_LEN 1
+#define MAC_VLANTR_DOVLTC_POS 20
+#define MAC_VLANTR_DOVLTC_LEN 1
+#define MAC_VLANTR_ERSVLM_POS 19
+#define MAC_VLANTR_ERSVLM_LEN 1
+#define MAC_VLANTR_ESVL_POS 18
+#define MAC_VLANTR_ESVL_LEN 1
+#define MAC_VLANTR_ETV_POS 16
+#define MAC_VLANTR_ETV_LEN 1
+#define MAC_VLANTR_EVLS_POS 21
+#define MAC_VLANTR_EVLS_LEN 2
+#define MAC_VLANTR_EVLRXS_POS 24
+#define MAC_VLANTR_EVLRXS_LEN 1
+#define MAC_VLANTR_VL_POS 0
+#define MAC_VLANTR_VL_LEN 16
+#define MAC_VLANTR_VTHM_POS 25
+#define MAC_VLANTR_VTHM_LEN 1
+#define MAC_VLANTR_VTIM_POS 17
+#define MAC_VLANTR_VTIM_LEN 1
+#define MAC_VR_DEVID_POS 8
+#define MAC_VR_DEVID_LEN 8
+#define MAC_VR_SNPSVER_POS 0
+#define MAC_VR_SNPSVER_LEN 8
+#define MAC_VR_USERVER_POS 16
+#define MAC_VR_USERVER_LEN 8
+
+/* MMC register offsets */
+#define MMC_CR 0x0800
+#define MMC_RISR 0x0804
+#define MMC_TISR 0x0808
+#define MMC_RIER 0x080c
+#define MMC_TIER 0x0810
+#define MMC_TXOCTETCOUNT_GB_LO 0x0814
+#define MMC_TXFRAMECOUNT_GB_LO 0x081c
+#define MMC_TXBROADCASTFRAMES_G_LO 0x0824
+#define MMC_TXMULTICASTFRAMES_G_LO 0x082c
+#define MMC_TX64OCTETS_GB_LO 0x0834
+#define MMC_TX65TO127OCTETS_GB_LO 0x083c
+#define MMC_TX128TO255OCTETS_GB_LO 0x0844
+#define MMC_TX256TO511OCTETS_GB_LO 0x084c
+#define MMC_TX512TO1023OCTETS_GB_LO 0x0854
+#define MMC_TX1024TOMAXOCTETS_GB_LO 0x085c
+#define MMC_TXUNICASTFRAMES_GB_LO 0x0864
+#define MMC_TXMULTICASTFRAMES_GB_LO 0x086c
+#define MMC_TXBROADCASTFRAMES_GB_LO 0x0874
+#define MMC_TXUNDERFLOWERROR_LO 0x087c
+#define MMC_TXOCTETCOUNT_G_LO 0x0884
+#define MMC_TXFRAMECOUNT_G_LO 0x088c
+#define MMC_TXPAUSEFRAMES_LO 0x0894
+#define MMC_TXVLANFRAMES_G_LO 0x089c
+#define MMC_RXFRAMECOUNT_GB_LO 0x0900
+#define MMC_RXOCTETCOUNT_GB_LO 0x0908
+#define MMC_RXOCTETCOUNT_G_LO 0x0910
+#define MMC_RXBROADCASTFRAMES_G_LO 0x0918
+#define MMC_RXMULTICASTFRAMES_G_LO 0x0920
+#define MMC_RXCRCERROR_LO 0x0928
+#define MMC_RXRUNTERROR 0x0930
+#define MMC_RXJABBERERROR 0x0934
+#define MMC_RXUNDERSIZE_G 0x0938
+#define MMC_RXOVERSIZE_G 0x093c
+#define MMC_RX64OCTETS_GB_LO 0x0940
+#define MMC_RX65TO127OCTETS_GB_LO 0x0948
+#define MMC_RX128TO255OCTETS_GB_LO 0x0950
+#define MMC_RX256TO511OCTETS_GB_LO 0x0958
+#define MMC_RX512TO1023OCTETS_GB_LO 0x0960
+#define MMC_RX1024TOMAXOCTETS_GB_LO 0x0968
+#define MMC_RXUNICASTFRAMES_G_LO 0x0970
+#define MMC_RXLENGTHERROR_LO 0x0978
+#define MMC_RXOUTOFRANGETYPE_LO 0x0980
+#define MMC_RXPAUSEFRAMES_LO 0x0988
+#define MMC_RXFIFOOVERFLOW_LO 0x0990
+#define MMC_RXVLANFRAMES_GB_LO 0x0998
+#define MMC_RXWATCHDOGERROR 0x09a0
+
+/* MMC register entry bit positions and sizes */
+#define MMC_CR_CR_POS 0
+#define MMC_CR_CR_LEN 1
+#define MMC_CR_CSR_POS 1
+#define MMC_CR_CSR_LEN 1
+#define MMC_CR_ROR_POS 2
+#define MMC_CR_ROR_LEN 1
+#define MMC_CR_MCF_POS 3
+#define MMC_CR_MCF_LEN 1
+#define MMC_CR_MCT_POS 4
+#define MMC_CR_MCT_LEN 2
+#define MMC_RIER_ALL_INTERRUPTS_POS 0
+#define MMC_RIER_ALL_INTERRUPTS_LEN 23
+#define MMC_RISR_RXFRAMECOUNT_GB_POS 0
+#define MMC_RISR_RXFRAMECOUNT_GB_LEN 1
+#define MMC_RISR_RXOCTETCOUNT_GB_POS 1
+#define MMC_RISR_RXOCTETCOUNT_GB_LEN 1
+#define MMC_RISR_RXOCTETCOUNT_G_POS 2
+#define MMC_RISR_RXOCTETCOUNT_G_LEN 1
+#define MMC_RISR_RXBROADCASTFRAMES_G_POS 3
+#define MMC_RISR_RXBROADCASTFRAMES_G_LEN 1
+#define MMC_RISR_RXMULTICASTFRAMES_G_POS 4
+#define MMC_RISR_RXMULTICASTFRAMES_G_LEN 1
+#define MMC_RISR_RXCRCERROR_POS 5
+#define MMC_RISR_RXCRCERROR_LEN 1
+#define MMC_RISR_RXRUNTERROR_POS 6
+#define MMC_RISR_RXRUNTERROR_LEN 1
+#define MMC_RISR_RXJABBERERROR_POS 7
+#define MMC_RISR_RXJABBERERROR_LEN 1
+#define MMC_RISR_RXUNDERSIZE_G_POS 8
+#define MMC_RISR_RXUNDERSIZE_G_LEN 1
+#define MMC_RISR_RXOVERSIZE_G_POS 9
+#define MMC_RISR_RXOVERSIZE_G_LEN 1
+#define MMC_RISR_RX64OCTETS_GB_POS 10
+#define MMC_RISR_RX64OCTETS_GB_LEN 1
+#define MMC_RISR_RX65TO127OCTETS_GB_POS 11
+#define MMC_RISR_RX65TO127OCTETS_GB_LEN 1
+#define MMC_RISR_RX128TO255OCTETS_GB_POS 12
+#define MMC_RISR_RX128TO255OCTETS_GB_LEN 1
+#define MMC_RISR_RX256TO511OCTETS_GB_POS 13
+#define MMC_RISR_RX256TO511OCTETS_GB_LEN 1
+#define MMC_RISR_RX512TO1023OCTETS_GB_POS 14
+#define MMC_RISR_RX512TO1023OCTETS_GB_LEN 1
+#define MMC_RISR_RX1024TOMAXOCTETS_GB_POS 15
+#define MMC_RISR_RX1024TOMAXOCTETS_GB_LEN 1
+#define MMC_RISR_RXUNICASTFRAMES_G_POS 16
+#define MMC_RISR_RXUNICASTFRAMES_G_LEN 1
+#define MMC_RISR_RXLENGTHERROR_POS 17
+#define MMC_RISR_RXLENGTHERROR_LEN 1
+#define MMC_RISR_RXOUTOFRANGETYPE_POS 18
+#define MMC_RISR_RXOUTOFRANGETYPE_LEN 1
+#define MMC_RISR_RXPAUSEFRAMES_POS 19
+#define MMC_RISR_RXPAUSEFRAMES_LEN 1
+#define MMC_RISR_RXFIFOOVERFLOW_POS 20
+#define MMC_RISR_RXFIFOOVERFLOW_LEN 1
+#define MMC_RISR_RXVLANFRAMES_GB_POS 21
+#define MMC_RISR_RXVLANFRAMES_GB_LEN 1
+#define MMC_RISR_RXWATCHDOGERROR_POS 22
+#define MMC_RISR_RXWATCHDOGERROR_LEN 1
+#define MMC_TIER_ALL_INTERRUPTS_POS 0
+#define MMC_TIER_ALL_INTERRUPTS_LEN 18
+#define MMC_TISR_TXOCTETCOUNT_GB_POS 0
+#define MMC_TISR_TXOCTETCOUNT_GB_LEN 1
+#define MMC_TISR_TXFRAMECOUNT_GB_POS 1
+#define MMC_TISR_TXFRAMECOUNT_GB_LEN 1
+#define MMC_TISR_TXBROADCASTFRAMES_G_POS 2
+#define MMC_TISR_TXBROADCASTFRAMES_G_LEN 1
+#define MMC_TISR_TXMULTICASTFRAMES_G_POS 3
+#define MMC_TISR_TXMULTICASTFRAMES_G_LEN 1
+#define MMC_TISR_TX64OCTETS_GB_POS 4
+#define MMC_TISR_TX64OCTETS_GB_LEN 1
+#define MMC_TISR_TX65TO127OCTETS_GB_POS 5
+#define MMC_TISR_TX65TO127OCTETS_GB_LEN 1
+#define MMC_TISR_TX128TO255OCTETS_GB_POS 6
+#define MMC_TISR_TX128TO255OCTETS_GB_LEN 1
+#define MMC_TISR_TX256TO511OCTETS_GB_POS 7
+#define MMC_TISR_TX256TO511OCTETS_GB_LEN 1
+#define MMC_TISR_TX512TO1023OCTETS_GB_POS 8
+#define MMC_TISR_TX512TO1023OCTETS_GB_LEN 1
+#define MMC_TISR_TX1024TOMAXOCTETS_GB_POS 9
+#define MMC_TISR_TX1024TOMAXOCTETS_GB_LEN 1
+#define MMC_TISR_TXUNICASTFRAMES_GB_POS 10
+#define MMC_TISR_TXUNICASTFRAMES_GB_LEN 1
+#define MMC_TISR_TXMULTICASTFRAMES_GB_POS 11
+#define MMC_TISR_TXMULTICASTFRAMES_GB_LEN 1
+#define MMC_TISR_TXBROADCASTFRAMES_GB_POS 12
+#define MMC_TISR_TXBROADCASTFRAMES_GB_LEN 1
+#define MMC_TISR_TXUNDERFLOWERROR_POS 13
+#define MMC_TISR_TXUNDERFLOWERROR_LEN 1
+#define MMC_TISR_TXOCTETCOUNT_G_POS 14
+#define MMC_TISR_TXOCTETCOUNT_G_LEN 1
+#define MMC_TISR_TXFRAMECOUNT_G_POS 15
+#define MMC_TISR_TXFRAMECOUNT_G_LEN 1
+#define MMC_TISR_TXPAUSEFRAMES_POS 16
+#define MMC_TISR_TXPAUSEFRAMES_LEN 1
+#define MMC_TISR_TXVLANFRAMES_G_POS 17
+#define MMC_TISR_TXVLANFRAMES_G_LEN 1
+
+/* MTL register offsets */
+#define MTL_OMR 0x1000
+#define MTL_FDDR 0x1010
+#define MTL_RQDCM0R 0x1030
+
+#define MTL_RQDCM_INC 4
+#define MTL_RQDCM_Q_PER_REG 4
+
+/* MTL register entry bit positions and sizes */
+#define MTL_OMR_ETSALG_POS 5
+#define MTL_OMR_ETSALG_LEN 2
+#define MTL_OMR_RAA_POS 2
+#define MTL_OMR_RAA_LEN 1
+
+/* MTL queue register offsets
+ * Multiple queues can be active. The first queue has registers
+ * that begin at 0x1100. Each subsequent queue has registers that
+ * are accessed using an offset of 0x80 from the previous queue.
+ */
+#define MTL_Q_BASE 0x1100
+#define MTL_Q_INC 0x80
+
+#define MTL_Q_TQOMR 0x00
+#define MTL_Q_RQOMR 0x40
+#define MTL_Q_RQDR 0x48
+#define MTL_Q_RQFCR 0x50
+#define MTL_Q_IER 0x70
+#define MTL_Q_ISR 0x74
+
+/* MTL queue register entry bit positions and sizes */
+#define MTL_Q_RQDR_PRXQ_POS 16
+#define MTL_Q_RQDR_PRXQ_LEN 14
+#define MTL_Q_RQDR_RXQSTS_POS 4
+#define MTL_Q_RQDR_RXQSTS_LEN 2
+#define MTL_Q_RQFCR_RFA_POS 1
+#define MTL_Q_RQFCR_RFA_LEN 6
+#define MTL_Q_RQFCR_RFD_POS 17
+#define MTL_Q_RQFCR_RFD_LEN 6
+#define MTL_Q_RQOMR_EHFC_POS 7
+#define MTL_Q_RQOMR_EHFC_LEN 1
+#define MTL_Q_RQOMR_RQS_POS 16
+#define MTL_Q_RQOMR_RQS_LEN 9
+#define MTL_Q_RQOMR_RSF_POS 5
+#define MTL_Q_RQOMR_RSF_LEN 1
+#define MTL_Q_RQOMR_FEP_POS 4
+#define MTL_Q_RQOMR_FEP_LEN 1
+#define MTL_Q_RQOMR_FUP_POS 3
+#define MTL_Q_RQOMR_FUP_LEN 1
+#define MTL_Q_RQOMR_RTC_POS 0
+#define MTL_Q_RQOMR_RTC_LEN 2
+#define MTL_Q_TQOMR_FTQ_POS 0
+#define MTL_Q_TQOMR_FTQ_LEN 1
+#define MTL_Q_TQOMR_Q2TCMAP_POS 8
+#define MTL_Q_TQOMR_Q2TCMAP_LEN 3
+#define MTL_Q_TQOMR_TQS_POS 16
+#define MTL_Q_TQOMR_TQS_LEN 10
+#define MTL_Q_TQOMR_TSF_POS 1
+#define MTL_Q_TQOMR_TSF_LEN 1
+#define MTL_Q_TQOMR_TTC_POS 4
+#define MTL_Q_TQOMR_TTC_LEN 3
+#define MTL_Q_TQOMR_TXQEN_POS 2
+#define MTL_Q_TQOMR_TXQEN_LEN 2
+
+/* MTL queue register value */
+#define MTL_RSF_DISABLE 0x00
+#define MTL_RSF_ENABLE 0x01
+#define MTL_TSF_DISABLE 0x00
+#define MTL_TSF_ENABLE 0x01
+
+#define MTL_RX_THRESHOLD_64 0x00
+#define MTL_RX_THRESHOLD_96 0x02
+#define MTL_RX_THRESHOLD_128 0x03
+#define MTL_TX_THRESHOLD_64 0x00
+#define MTL_TX_THRESHOLD_96 0x02
+#define MTL_TX_THRESHOLD_128 0x03
+#define MTL_TX_THRESHOLD_192 0x04
+#define MTL_TX_THRESHOLD_256 0x05
+#define MTL_TX_THRESHOLD_384 0x06
+#define MTL_TX_THRESHOLD_512 0x07
+
+#define MTL_ETSALG_WRR 0x00
+#define MTL_ETSALG_WFQ 0x01
+#define MTL_ETSALG_DWRR 0x02
+#define MTL_RAA_SP 0x00
+#define MTL_RAA_WSP 0x01
+
+#define MTL_Q_DISABLED 0x00
+#define MTL_Q_ENABLED 0x02
+
+#define MTL_RQDCM0R_Q0MDMACH 0x0
+#define MTL_RQDCM0R_Q1MDMACH 0x00000100
+#define MTL_RQDCM0R_Q2MDMACH 0x00020000
+#define MTL_RQDCM0R_Q3MDMACH 0x03000000
+#define MTL_RQDCM1R_Q4MDMACH 0x00000004
+#define MTL_RQDCM1R_Q5MDMACH 0x00000500
+#define MTL_RQDCM1R_Q6MDMACH 0x00060000
+#define MTL_RQDCM1R_Q7MDMACH 0x07000000
+#define MTL_RQDCM2R_Q8MDMACH 0x00000008
+#define MTL_RQDCM2R_Q9MDMACH 0x00000900
+#define MTL_RQDCM2R_Q10MDMACH 0x000A0000
+#define MTL_RQDCM2R_Q11MDMACH 0x0B000000
+
+/* MTL traffic class register offsets
+ * Multiple traffic classes can be active. The first class has registers
+ * that begin at 0x1100. Each subsequent queue has registers that
+ * are accessed using an offset of 0x80 from the previous queue.
+ */
+#define MTL_TC_BASE MTL_Q_BASE
+#define MTL_TC_INC MTL_Q_INC
+
+#define MTL_TC_ETSCR 0x10
+#define MTL_TC_ETSSR 0x14
+#define MTL_TC_QWR 0x18
+
+/* MTL traffic class register entry bit positions and sizes */
+#define MTL_TC_ETSCR_TSA_POS 0
+#define MTL_TC_ETSCR_TSA_LEN 2
+#define MTL_TC_QWR_QW_POS 0
+#define MTL_TC_QWR_QW_LEN 21
+
+/* MTL traffic class register value */
+#define MTL_TSA_SP 0x00
+#define MTL_TSA_ETS 0x02
+
+/* DMA register offsets */
+#define DMA_MR 0x3000
+#define DMA_SBMR 0x3004
+#define DMA_ISR 0x3008
+#define DMA_DSR0 0x3020
+#define DMA_DSR1 0x3024
+
+/* DMA register entry bit positions and sizes */
+#define DMA_ISR_MACIS_POS 17
+#define DMA_ISR_MACIS_LEN 1
+#define DMA_ISR_MTLIS_POS 16
+#define DMA_ISR_MTLIS_LEN 1
+#define DMA_MR_SWR_POS 0
+#define DMA_MR_SWR_LEN 1
+#define DMA_SBMR_EAME_POS 11
+#define DMA_SBMR_EAME_LEN 1
+#define DMA_SBMR_BLEN_64_POS 5
+#define DMA_SBMR_BLEN_64_LEN 1
+#define DMA_SBMR_BLEN_128_POS 6
+#define DMA_SBMR_BLEN_128_LEN 1
+#define DMA_SBMR_BLEN_256_POS 7
+#define DMA_SBMR_BLEN_256_LEN 1
+#define DMA_SBMR_UNDEF_POS 0
+#define DMA_SBMR_UNDEF_LEN 1
+
+/* DMA register values */
+#define DMA_DSR_RPS_LEN 4
+#define DMA_DSR_TPS_LEN 4
+#define DMA_DSR_Q_LEN (DMA_DSR_RPS_LEN + DMA_DSR_TPS_LEN)
+#define DMA_DSR0_TPS_START 12
+#define DMA_DSRX_FIRST_QUEUE 3
+#define DMA_DSRX_INC 4
+#define DMA_DSRX_QPR 4
+#define DMA_DSRX_TPS_START 4
+#define DMA_TPS_STOPPED 0x00
+#define DMA_TPS_SUSPENDED 0x06
+
+/* DMA channel register offsets
+ * Multiple channels can be active. The first channel has registers
+ * that begin at 0x3100. Each subsequent channel has registers that
+ * are accessed using an offset of 0x80 from the previous channel.
+ */
+#define DMA_CH_BASE 0x3100
+#define DMA_CH_INC 0x80
+
+#define DMA_CH_CR 0x00
+#define DMA_CH_TCR 0x04
+#define DMA_CH_RCR 0x08
+#define DMA_CH_TDLR_HI 0x10
+#define DMA_CH_TDLR_LO 0x14
+#define DMA_CH_RDLR_HI 0x18
+#define DMA_CH_RDLR_LO 0x1c
+#define DMA_CH_TDTR_LO 0x24
+#define DMA_CH_RDTR_LO 0x2c
+#define DMA_CH_TDRLR 0x30
+#define DMA_CH_RDRLR 0x34
+#define DMA_CH_IER 0x38
+#define DMA_CH_RIWT 0x3c
+#define DMA_CH_SR 0x60
+
+/* DMA channel register entry bit positions and sizes */
+#define DMA_CH_CR_PBLX8_POS 16
+#define DMA_CH_CR_PBLX8_LEN 1
+#define DMA_CH_CR_SPH_POS 24
+#define DMA_CH_CR_SPH_LEN 1
+#define DMA_CH_IER_AIE_POS 15
+#define DMA_CH_IER_AIE_LEN 1
+#define DMA_CH_IER_FBEE_POS 12
+#define DMA_CH_IER_FBEE_LEN 1
+#define DMA_CH_IER_NIE_POS 16
+#define DMA_CH_IER_NIE_LEN 1
+#define DMA_CH_IER_RBUE_POS 7
+#define DMA_CH_IER_RBUE_LEN 1
+#define DMA_CH_IER_RIE_POS 6
+#define DMA_CH_IER_RIE_LEN 1
+#define DMA_CH_IER_RSE_POS 8
+#define DMA_CH_IER_RSE_LEN 1
+#define DMA_CH_IER_TBUE_POS 2
+#define DMA_CH_IER_TBUE_LEN 1
+#define DMA_CH_IER_TIE_POS 0
+#define DMA_CH_IER_TIE_LEN 1
+#define DMA_CH_IER_TXSE_POS 1
+#define DMA_CH_IER_TXSE_LEN 1
+#define DMA_CH_RCR_PBL_POS 16
+#define DMA_CH_RCR_PBL_LEN 6
+#define DMA_CH_RCR_RBSZ_POS 1
+#define DMA_CH_RCR_RBSZ_LEN 14
+#define DMA_CH_RCR_SR_POS 0
+#define DMA_CH_RCR_SR_LEN 1
+#define DMA_CH_RIWT_RWT_POS 0
+#define DMA_CH_RIWT_RWT_LEN 8
+#define DMA_CH_SR_FBE_POS 12
+#define DMA_CH_SR_FBE_LEN 1
+#define DMA_CH_SR_RBU_POS 7
+#define DMA_CH_SR_RBU_LEN 1
+#define DMA_CH_SR_RI_POS 6
+#define DMA_CH_SR_RI_LEN 1
+#define DMA_CH_SR_RPS_POS 8
+#define DMA_CH_SR_RPS_LEN 1
+#define DMA_CH_SR_TBU_POS 2
+#define DMA_CH_SR_TBU_LEN 1
+#define DMA_CH_SR_TI_POS 0
+#define DMA_CH_SR_TI_LEN 1
+#define DMA_CH_SR_TPS_POS 1
+#define DMA_CH_SR_TPS_LEN 1
+#define DMA_CH_TCR_OSP_POS 4
+#define DMA_CH_TCR_OSP_LEN 1
+#define DMA_CH_TCR_PBL_POS 16
+#define DMA_CH_TCR_PBL_LEN 6
+#define DMA_CH_TCR_ST_POS 0
+#define DMA_CH_TCR_ST_LEN 1
+#define DMA_CH_TCR_TSE_POS 12
+#define DMA_CH_TCR_TSE_LEN 1
+
+/* DMA channel register values */
+#define DMA_OSP_DISABLE 0x00
+#define DMA_OSP_ENABLE 0x01
+#define DMA_PBL_1 1
+#define DMA_PBL_2 2
+#define DMA_PBL_4 4
+#define DMA_PBL_8 8
+#define DMA_PBL_16 16
+#define DMA_PBL_32 32
+#define DMA_PBL_64 64
+#define DMA_PBL_128 128
+#define DMA_PBL_256 256
+#define DMA_PBL_X8_DISABLE 0x00
+#define DMA_PBL_X8_ENABLE 0x01
+
+/* Descriptor/Packet entry bit positions and sizes */
+#define RX_PACKET_ERRORS_CRC_POS 2
+#define RX_PACKET_ERRORS_CRC_LEN 1
+#define RX_PACKET_ERRORS_FRAME_POS 3
+#define RX_PACKET_ERRORS_FRAME_LEN 1
+#define RX_PACKET_ERRORS_LENGTH_POS 0
+#define RX_PACKET_ERRORS_LENGTH_LEN 1
+#define RX_PACKET_ERRORS_OVERRUN_POS 1
+#define RX_PACKET_ERRORS_OVERRUN_LEN 1
+
+#define RX_PACKET_ATTRIBUTES_CSUM_DONE_POS 0
+#define RX_PACKET_ATTRIBUTES_CSUM_DONE_LEN 1
+#define RX_PACKET_ATTRIBUTES_VLAN_CTAG_POS 1
+#define RX_PACKET_ATTRIBUTES_VLAN_CTAG_LEN 1
+#define RX_PACKET_ATTRIBUTES_INCOMPLETE_POS 2
+#define RX_PACKET_ATTRIBUTES_INCOMPLETE_LEN 1
+#define RX_PACKET_ATTRIBUTES_CONTEXT_NEXT_POS 3
+#define RX_PACKET_ATTRIBUTES_CONTEXT_NEXT_LEN 1
+#define RX_PACKET_ATTRIBUTES_CONTEXT_POS 4
+#define RX_PACKET_ATTRIBUTES_CONTEXT_LEN 1
+#define RX_PACKET_ATTRIBUTES_RX_TSTAMP_POS 5
+#define RX_PACKET_ATTRIBUTES_RX_TSTAMP_LEN 1
+#define RX_PACKET_ATTRIBUTES_RSS_HASH_POS 6
+#define RX_PACKET_ATTRIBUTES_RSS_HASH_LEN 1
+
+#define RX_NORMAL_DESC0_OVT_POS 0
+#define RX_NORMAL_DESC0_OVT_LEN 16
+#define RX_NORMAL_DESC2_HL_POS 0
+#define RX_NORMAL_DESC2_HL_LEN 10
+#define RX_NORMAL_DESC3_CDA_POS 27
+#define RX_NORMAL_DESC3_CDA_LEN 1
+#define RX_NORMAL_DESC3_CTXT_POS 30
+#define RX_NORMAL_DESC3_CTXT_LEN 1
+#define RX_NORMAL_DESC3_ES_POS 15
+#define RX_NORMAL_DESC3_ES_LEN 1
+#define RX_NORMAL_DESC3_ETLT_POS 16
+#define RX_NORMAL_DESC3_ETLT_LEN 4
+#define RX_NORMAL_DESC3_FD_POS 29
+#define RX_NORMAL_DESC3_FD_LEN 1
+#define RX_NORMAL_DESC3_INTE_POS 30
+#define RX_NORMAL_DESC3_INTE_LEN 1
+#define RX_NORMAL_DESC3_L34T_POS 20
+#define RX_NORMAL_DESC3_L34T_LEN 4
+#define RX_NORMAL_DESC3_LD_POS 28
+#define RX_NORMAL_DESC3_LD_LEN 1
+#define RX_NORMAL_DESC3_OWN_POS 31
+#define RX_NORMAL_DESC3_OWN_LEN 1
+#define RX_NORMAL_DESC3_PL_POS 0
+#define RX_NORMAL_DESC3_PL_LEN 14
+#define RX_NORMAL_DESC3_RSV_POS 26
+#define RX_NORMAL_DESC3_RSV_LEN 1
+
+#define RX_DESC3_L34T_IPV4_TCP 1
+#define RX_DESC3_L34T_IPV4_UDP 2
+#define RX_DESC3_L34T_IPV4_ICMP 3
+#define RX_DESC3_L34T_IPV6_TCP 9
+#define RX_DESC3_L34T_IPV6_UDP 10
+#define RX_DESC3_L34T_IPV6_ICMP 11
+
+#define RX_CONTEXT_DESC3_TSA_POS 4
+#define RX_CONTEXT_DESC3_TSA_LEN 1
+#define RX_CONTEXT_DESC3_TSD_POS 6
+#define RX_CONTEXT_DESC3_TSD_LEN 1
+
+#define TX_PACKET_ATTRIBUTES_CSUM_ENABLE_POS 0
+#define TX_PACKET_ATTRIBUTES_CSUM_ENABLE_LEN 1
+#define TX_PACKET_ATTRIBUTES_TSO_ENABLE_POS 1
+#define TX_PACKET_ATTRIBUTES_TSO_ENABLE_LEN 1
+#define TX_PACKET_ATTRIBUTES_VLAN_CTAG_POS 2
+#define TX_PACKET_ATTRIBUTES_VLAN_CTAG_LEN 1
+#define TX_PACKET_ATTRIBUTES_PTP_POS 3
+#define TX_PACKET_ATTRIBUTES_PTP_LEN 1
+
+#define TX_CONTEXT_DESC2_MSS_POS 0
+#define TX_CONTEXT_DESC2_MSS_LEN 15
+#define TX_CONTEXT_DESC3_CTXT_POS 30
+#define TX_CONTEXT_DESC3_CTXT_LEN 1
+#define TX_CONTEXT_DESC3_TCMSSV_POS 26
+#define TX_CONTEXT_DESC3_TCMSSV_LEN 1
+#define TX_CONTEXT_DESC3_VLTV_POS 16
+#define TX_CONTEXT_DESC3_VLTV_LEN 1
+#define TX_CONTEXT_DESC3_VT_POS 0
+#define TX_CONTEXT_DESC3_VT_LEN 16
+
+#define TX_NORMAL_DESC2_HL_B1L_POS 0
+#define TX_NORMAL_DESC2_HL_B1L_LEN 14
+#define TX_NORMAL_DESC2_IC_POS 31
+#define TX_NORMAL_DESC2_IC_LEN 1
+#define TX_NORMAL_DESC2_TTSE_POS 30
+#define TX_NORMAL_DESC2_TTSE_LEN 1
+#define TX_NORMAL_DESC2_VTIR_POS 14
+#define TX_NORMAL_DESC2_VTIR_LEN 2
+#define TX_NORMAL_DESC3_CIC_POS 16
+#define TX_NORMAL_DESC3_CIC_LEN 2
+#define TX_NORMAL_DESC3_CPC_POS 26
+#define TX_NORMAL_DESC3_CPC_LEN 2
+#define TX_NORMAL_DESC3_CTXT_POS 30
+#define TX_NORMAL_DESC3_CTXT_LEN 1
+#define TX_NORMAL_DESC3_FD_POS 29
+#define TX_NORMAL_DESC3_FD_LEN 1
+#define TX_NORMAL_DESC3_FL_POS 0
+#define TX_NORMAL_DESC3_FL_LEN 15
+#define TX_NORMAL_DESC3_LD_POS 28
+#define TX_NORMAL_DESC3_LD_LEN 1
+#define TX_NORMAL_DESC3_OWN_POS 31
+#define TX_NORMAL_DESC3_OWN_LEN 1
+#define TX_NORMAL_DESC3_TCPHDRLEN_POS 19
+#define TX_NORMAL_DESC3_TCPHDRLEN_LEN 4
+#define TX_NORMAL_DESC3_TCPPL_POS 0
+#define TX_NORMAL_DESC3_TCPPL_LEN 18
+#define TX_NORMAL_DESC3_TSE_POS 18
+#define TX_NORMAL_DESC3_TSE_LEN 1
+
+#define TX_NORMAL_DESC2_VLAN_INSERT 0x2
+
+#define XLGMAC_MTL_REG(pdata, n, reg) \
+ ((pdata)->mac_regs + MTL_Q_BASE + ((n) * MTL_Q_INC) + (reg))
+
+#define XLGMAC_DMA_REG(channel, reg) ((channel)->dma_regs + (reg))
+
+#endif /* __DWC_XLGMAC_REG_H__ */
--- /dev/null
+/* Synopsys DesignWare Core Enterprise Ethernet (XLGMAC) Driver
+ *
+ * Copyright (c) 2017 Synopsys, Inc. (www.synopsys.com)
+ *
+ * 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; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This Synopsys DWC XLGMAC software driver and associated documentation
+ * (hereinafter the "Software") is an unsupported proprietary work of
+ * Synopsys, Inc. unless otherwise expressly agreed to in writing between
+ * Synopsys and you. The Software IS NOT an item of Licensed Software or a
+ * Licensed Product under any End User Software License Agreement or
+ * Agreement for Licensed Products with Synopsys or any supplement thereto.
+ * Synopsys is a registered trademark of Synopsys, Inc. Other names included
+ * in the SOFTWARE may be the trademarks of their respective owners.
+ */
+
+#ifndef __DWC_XLGMAC_H__
+#define __DWC_XLGMAC_H__
+
+#include <linux/dma-mapping.h>
+#include <linux/netdevice.h>
+#include <linux/workqueue.h>
+#include <linux/phy.h>
+#include <linux/if_vlan.h>
+#include <linux/bitops.h>
+#include <linux/timecounter.h>
+
+#define XLGMAC_DRV_NAME "dwc-xlgmac"
+#define XLGMAC_DRV_VERSION "1.0.0"
+#define XLGMAC_DRV_DESC "Synopsys DWC XLGMAC Driver"
+
+/* Descriptor related parameters */
+#define XLGMAC_TX_DESC_CNT 1024
+#define XLGMAC_TX_DESC_MIN_FREE (XLGMAC_TX_DESC_CNT >> 3)
+#define XLGMAC_TX_DESC_MAX_PROC (XLGMAC_TX_DESC_CNT >> 1)
+#define XLGMAC_RX_DESC_CNT 1024
+#define XLGMAC_RX_DESC_MAX_DIRTY (XLGMAC_RX_DESC_CNT >> 3)
+
+/* Descriptors required for maximum contiguous TSO/GSO packet */
+#define XLGMAC_TX_MAX_SPLIT ((GSO_MAX_SIZE / XLGMAC_TX_MAX_BUF_SIZE) + 1)
+
+/* Maximum possible descriptors needed for a SKB */
+#define XLGMAC_TX_MAX_DESC_NR (MAX_SKB_FRAGS + XLGMAC_TX_MAX_SPLIT + 2)
+
+#define XLGMAC_TX_MAX_BUF_SIZE (0x3fff & ~(64 - 1))
+#define XLGMAC_RX_MIN_BUF_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN + VLAN_HLEN)
+#define XLGMAC_RX_BUF_ALIGN 64
+
+/* Maximum Size for Splitting the Header Data
+ * Keep in sync with SKB_ALLOC_SIZE
+ * 3'b000: 64 bytes, 3'b001: 128 bytes
+ * 3'b010: 256 bytes, 3'b011: 512 bytes
+ * 3'b100: 1023 bytes , 3'b101'3'b111: Reserved
+ */
+#define XLGMAC_SPH_HDSMS_SIZE 3
+#define XLGMAC_SKB_ALLOC_SIZE 512
+
+#define XLGMAC_MAX_FIFO 81920
+
+#define XLGMAC_MAX_DMA_CHANNELS 16
+#define XLGMAC_DMA_STOP_TIMEOUT 5
+#define XLGMAC_DMA_INTERRUPT_MASK 0x31c7
+
+/* Default coalescing parameters */
+#define XLGMAC_INIT_DMA_TX_USECS 1000
+#define XLGMAC_INIT_DMA_TX_FRAMES 25
+#define XLGMAC_INIT_DMA_RX_USECS 30
+#define XLGMAC_INIT_DMA_RX_FRAMES 25
+
+/* Flow control queue count */
+#define XLGMAC_MAX_FLOW_CONTROL_QUEUES 8
+
+/* System clock is 125 MHz */
+#define XLGMAC_SYSCLOCK 125000000
+
+/* Maximum MAC address hash table size (256 bits = 8 bytes) */
+#define XLGMAC_MAC_HASH_TABLE_SIZE 8
+
+/* Receive Side Scaling */
+#define XLGMAC_RSS_HASH_KEY_SIZE 40
+#define XLGMAC_RSS_MAX_TABLE_SIZE 256
+#define XLGMAC_RSS_LOOKUP_TABLE_TYPE 0
+#define XLGMAC_RSS_HASH_KEY_TYPE 1
+
+#define XLGMAC_STD_PACKET_MTU 1500
+#define XLGMAC_JUMBO_PACKET_MTU 9000
+
+/* Helper macro for descriptor handling
+ * Always use XLGMAC_GET_DESC_DATA to access the descriptor data
+ */
+#define XLGMAC_GET_DESC_DATA(ring, idx) ({ \
+ typeof(ring) _ring = (ring); \
+ ((_ring)->desc_data_head + \
+ ((idx) & ((_ring)->dma_desc_count - 1))); \
+})
+
+#define XLGMAC_GET_REG_BITS(var, pos, len) ({ \
+ typeof(pos) _pos = (pos); \
+ typeof(len) _len = (len); \
+ ((var) & GENMASK(_pos + _len - 1, _pos)) >> (_pos); \
+})
+
+#define XLGMAC_GET_REG_BITS_LE(var, pos, len) ({ \
+ typeof(pos) _pos = (pos); \
+ typeof(len) _len = (len); \
+ typeof(var) _var = le32_to_cpu((var)); \
+ ((_var) & GENMASK(_pos + _len - 1, _pos)) >> (_pos); \
+})
+
+#define XLGMAC_SET_REG_BITS(var, pos, len, val) ({ \
+ typeof(var) _var = (var); \
+ typeof(pos) _pos = (pos); \
+ typeof(len) _len = (len); \
+ typeof(val) _val = (val); \
+ _val = (_val << _pos) & GENMASK(_pos + _len - 1, _pos); \
+ _var = (_var & ~GENMASK(_pos + _len - 1, _pos)) | _val; \
+})
+
+#define XLGMAC_SET_REG_BITS_LE(var, pos, len, val) ({ \
+ typeof(var) _var = (var); \
+ typeof(pos) _pos = (pos); \
+ typeof(len) _len = (len); \
+ typeof(val) _val = (val); \
+ _val = (_val << _pos) & GENMASK(_pos + _len - 1, _pos); \
+ _var = (_var & ~GENMASK(_pos + _len - 1, _pos)) | _val; \
+ cpu_to_le32(_var); \
+})
+
+struct xlgmac_pdata;
+
+enum xlgmac_int {
+ XLGMAC_INT_DMA_CH_SR_TI,
+ XLGMAC_INT_DMA_CH_SR_TPS,
+ XLGMAC_INT_DMA_CH_SR_TBU,
+ XLGMAC_INT_DMA_CH_SR_RI,
+ XLGMAC_INT_DMA_CH_SR_RBU,
+ XLGMAC_INT_DMA_CH_SR_RPS,
+ XLGMAC_INT_DMA_CH_SR_TI_RI,
+ XLGMAC_INT_DMA_CH_SR_FBE,
+ XLGMAC_INT_DMA_ALL,
+};
+
+struct xlgmac_stats {
+ /* MMC TX counters */
+ u64 txoctetcount_gb;
+ u64 txframecount_gb;
+ u64 txbroadcastframes_g;
+ u64 txmulticastframes_g;
+ u64 tx64octets_gb;
+ u64 tx65to127octets_gb;
+ u64 tx128to255octets_gb;
+ u64 tx256to511octets_gb;
+ u64 tx512to1023octets_gb;
+ u64 tx1024tomaxoctets_gb;
+ u64 txunicastframes_gb;
+ u64 txmulticastframes_gb;
+ u64 txbroadcastframes_gb;
+ u64 txunderflowerror;
+ u64 txoctetcount_g;
+ u64 txframecount_g;
+ u64 txpauseframes;
+ u64 txvlanframes_g;
+
+ /* MMC RX counters */
+ u64 rxframecount_gb;
+ u64 rxoctetcount_gb;
+ u64 rxoctetcount_g;
+ u64 rxbroadcastframes_g;
+ u64 rxmulticastframes_g;
+ u64 rxcrcerror;
+ u64 rxrunterror;
+ u64 rxjabbererror;
+ u64 rxundersize_g;
+ u64 rxoversize_g;
+ u64 rx64octets_gb;
+ u64 rx65to127octets_gb;
+ u64 rx128to255octets_gb;
+ u64 rx256to511octets_gb;
+ u64 rx512to1023octets_gb;
+ u64 rx1024tomaxoctets_gb;
+ u64 rxunicastframes_g;
+ u64 rxlengtherror;
+ u64 rxoutofrangetype;
+ u64 rxpauseframes;
+ u64 rxfifooverflow;
+ u64 rxvlanframes_gb;
+ u64 rxwatchdogerror;
+
+ /* Extra counters */
+ u64 tx_tso_packets;
+ u64 rx_split_header_packets;
+ u64 rx_buffer_unavailable;
+};
+
+struct xlgmac_ring_buf {
+ struct sk_buff *skb;
+ dma_addr_t skb_dma;
+ unsigned int skb_len;
+};
+
+/* Common Tx and Rx DMA hardware descriptor */
+struct xlgmac_dma_desc {
+ __le32 desc0;
+ __le32 desc1;
+ __le32 desc2;
+ __le32 desc3;
+};
+
+/* Page allocation related values */
+struct xlgmac_page_alloc {
+ struct page *pages;
+ unsigned int pages_len;
+ unsigned int pages_offset;
+
+ dma_addr_t pages_dma;
+};
+
+/* Ring entry buffer data */
+struct xlgmac_buffer_data {
+ struct xlgmac_page_alloc pa;
+ struct xlgmac_page_alloc pa_unmap;
+
+ dma_addr_t dma_base;
+ unsigned long dma_off;
+ unsigned int dma_len;
+};
+
+/* Tx-related desc data */
+struct xlgmac_tx_desc_data {
+ unsigned int packets; /* BQL packet count */
+ unsigned int bytes; /* BQL byte count */
+};
+
+/* Rx-related desc data */
+struct xlgmac_rx_desc_data {
+ struct xlgmac_buffer_data hdr; /* Header locations */
+ struct xlgmac_buffer_data buf; /* Payload locations */
+
+ unsigned short hdr_len; /* Length of received header */
+ unsigned short len; /* Length of received packet */
+};
+
+struct xlgmac_pkt_info {
+ struct sk_buff *skb;
+
+ unsigned int attributes;
+
+ unsigned int errors;
+
+ /* descriptors needed for this packet */
+ unsigned int desc_count;
+ unsigned int length;
+
+ unsigned int tx_packets;
+ unsigned int tx_bytes;
+
+ unsigned int header_len;
+ unsigned int tcp_header_len;
+ unsigned int tcp_payload_len;
+ unsigned short mss;
+
+ unsigned short vlan_ctag;
+
+ u64 rx_tstamp;
+
+ u32 rss_hash;
+ enum pkt_hash_types rss_hash_type;
+};
+
+struct xlgmac_desc_data {
+ /* dma_desc: Virtual address of descriptor
+ * dma_desc_addr: DMA address of descriptor
+ */
+ struct xlgmac_dma_desc *dma_desc;
+ dma_addr_t dma_desc_addr;
+
+ /* skb: Virtual address of SKB
+ * skb_dma: DMA address of SKB data
+ * skb_dma_len: Length of SKB DMA area
+ */
+ struct sk_buff *skb;
+ dma_addr_t skb_dma;
+ unsigned int skb_dma_len;
+
+ /* Tx/Rx -related data */
+ struct xlgmac_tx_desc_data tx;
+ struct xlgmac_rx_desc_data rx;
+
+ unsigned int mapped_as_page;
+
+ /* Incomplete receive save location. If the budget is exhausted
+ * or the last descriptor (last normal descriptor or a following
+ * context descriptor) has not been DMA'd yet the current state
+ * of the receive processing needs to be saved.
+ */
+ unsigned int state_saved;
+ struct {
+ struct sk_buff *skb;
+ unsigned int len;
+ unsigned int error;
+ } state;
+};
+
+struct xlgmac_ring {
+ /* Per packet related information */
+ struct xlgmac_pkt_info pkt_info;
+
+ /* Virtual/DMA addresses of DMA descriptor list and the total count */
+ struct xlgmac_dma_desc *dma_desc_head;
+ dma_addr_t dma_desc_head_addr;
+ unsigned int dma_desc_count;
+
+ /* Array of descriptor data corresponding the DMA descriptor
+ * (always use the XLGMAC_GET_DESC_DATA macro to access this data)
+ */
+ struct xlgmac_desc_data *desc_data_head;
+
+ /* Page allocation for RX buffers */
+ struct xlgmac_page_alloc rx_hdr_pa;
+ struct xlgmac_page_alloc rx_buf_pa;
+
+ /* Ring index values
+ * cur - Tx: index of descriptor to be used for current transfer
+ * Rx: index of descriptor to check for packet availability
+ * dirty - Tx: index of descriptor to check for transfer complete
+ * Rx: index of descriptor to check for buffer reallocation
+ */
+ unsigned int cur;
+ unsigned int dirty;
+
+ /* Coalesce frame count used for interrupt bit setting */
+ unsigned int coalesce_count;
+
+ union {
+ struct {
+ unsigned int xmit_more;
+ unsigned int queue_stopped;
+ unsigned short cur_mss;
+ unsigned short cur_vlan_ctag;
+ } tx;
+ };
+} ____cacheline_aligned;
+
+struct xlgmac_channel {
+ char name[16];
+
+ /* Address of private data area for device */
+ struct xlgmac_pdata *pdata;
+
+ /* Queue index and base address of queue's DMA registers */
+ unsigned int queue_index;
+ void __iomem *dma_regs;
+
+ /* Per channel interrupt irq number */
+ int dma_irq;
+ char dma_irq_name[IFNAMSIZ + 32];
+
+ /* Netdev related settings */
+ struct napi_struct napi;
+
+ unsigned int saved_ier;
+
+ unsigned int tx_timer_active;
+ struct timer_list tx_timer;
+
+ struct xlgmac_ring *tx_ring;
+ struct xlgmac_ring *rx_ring;
+} ____cacheline_aligned;
+
+struct xlgmac_desc_ops {
+ int (*alloc_channles_and_rings)(struct xlgmac_pdata *pdata);
+ void (*free_channels_and_rings)(struct xlgmac_pdata *pdata);
+ int (*map_tx_skb)(struct xlgmac_channel *channel,
+ struct sk_buff *skb);
+ int (*map_rx_buffer)(struct xlgmac_pdata *pdata,
+ struct xlgmac_ring *ring,
+ struct xlgmac_desc_data *desc_data);
+ void (*unmap_desc_data)(struct xlgmac_pdata *pdata,
+ struct xlgmac_desc_data *desc_data);
+ void (*tx_desc_init)(struct xlgmac_pdata *pdata);
+ void (*rx_desc_init)(struct xlgmac_pdata *pdata);
+};
+
+struct xlgmac_hw_ops {
+ int (*init)(struct xlgmac_pdata *pdata);
+ int (*exit)(struct xlgmac_pdata *pdata);
+
+ int (*tx_complete)(struct xlgmac_dma_desc *dma_desc);
+
+ void (*enable_tx)(struct xlgmac_pdata *pdata);
+ void (*disable_tx)(struct xlgmac_pdata *pdata);
+ void (*enable_rx)(struct xlgmac_pdata *pdata);
+ void (*disable_rx)(struct xlgmac_pdata *pdata);
+
+ int (*enable_int)(struct xlgmac_channel *channel,
+ enum xlgmac_int int_id);
+ int (*disable_int)(struct xlgmac_channel *channel,
+ enum xlgmac_int int_id);
+ void (*dev_xmit)(struct xlgmac_channel *channel);
+ int (*dev_read)(struct xlgmac_channel *channel);
+
+ int (*set_mac_address)(struct xlgmac_pdata *pdata, u8 *addr);
+ int (*config_rx_mode)(struct xlgmac_pdata *pdata);
+ int (*enable_rx_csum)(struct xlgmac_pdata *pdata);
+ int (*disable_rx_csum)(struct xlgmac_pdata *pdata);
+
+ /* For MII speed configuration */
+ int (*set_xlgmii_25000_speed)(struct xlgmac_pdata *pdata);
+ int (*set_xlgmii_40000_speed)(struct xlgmac_pdata *pdata);
+ int (*set_xlgmii_50000_speed)(struct xlgmac_pdata *pdata);
+ int (*set_xlgmii_100000_speed)(struct xlgmac_pdata *pdata);
+
+ /* For descriptor related operation */
+ void (*tx_desc_init)(struct xlgmac_channel *channel);
+ void (*rx_desc_init)(struct xlgmac_channel *channel);
+ void (*tx_desc_reset)(struct xlgmac_desc_data *desc_data);
+ void (*rx_desc_reset)(struct xlgmac_pdata *pdata,
+ struct xlgmac_desc_data *desc_data,
+ unsigned int index);
+ int (*is_last_desc)(struct xlgmac_dma_desc *dma_desc);
+ int (*is_context_desc)(struct xlgmac_dma_desc *dma_desc);
+ void (*tx_start_xmit)(struct xlgmac_channel *channel,
+ struct xlgmac_ring *ring);
+
+ /* For Flow Control */
+ int (*config_tx_flow_control)(struct xlgmac_pdata *pdata);
+ int (*config_rx_flow_control)(struct xlgmac_pdata *pdata);
+
+ /* For Vlan related config */
+ int (*enable_rx_vlan_stripping)(struct xlgmac_pdata *pdata);
+ int (*disable_rx_vlan_stripping)(struct xlgmac_pdata *pdata);
+ int (*enable_rx_vlan_filtering)(struct xlgmac_pdata *pdata);
+ int (*disable_rx_vlan_filtering)(struct xlgmac_pdata *pdata);
+ int (*update_vlan_hash_table)(struct xlgmac_pdata *pdata);
+
+ /* For RX coalescing */
+ int (*config_rx_coalesce)(struct xlgmac_pdata *pdata);
+ int (*config_tx_coalesce)(struct xlgmac_pdata *pdata);
+ unsigned int (*usec_to_riwt)(struct xlgmac_pdata *pdata,
+ unsigned int usec);
+ unsigned int (*riwt_to_usec)(struct xlgmac_pdata *pdata,
+ unsigned int riwt);
+
+ /* For RX and TX threshold config */
+ int (*config_rx_threshold)(struct xlgmac_pdata *pdata,
+ unsigned int val);
+ int (*config_tx_threshold)(struct xlgmac_pdata *pdata,
+ unsigned int val);
+
+ /* For RX and TX Store and Forward Mode config */
+ int (*config_rsf_mode)(struct xlgmac_pdata *pdata,
+ unsigned int val);
+ int (*config_tsf_mode)(struct xlgmac_pdata *pdata,
+ unsigned int val);
+
+ /* For TX DMA Operate on Second Frame config */
+ int (*config_osp_mode)(struct xlgmac_pdata *pdata);
+
+ /* For RX and TX PBL config */
+ int (*config_rx_pbl_val)(struct xlgmac_pdata *pdata);
+ int (*get_rx_pbl_val)(struct xlgmac_pdata *pdata);
+ int (*config_tx_pbl_val)(struct xlgmac_pdata *pdata);
+ int (*get_tx_pbl_val)(struct xlgmac_pdata *pdata);
+ int (*config_pblx8)(struct xlgmac_pdata *pdata);
+
+ /* For MMC statistics */
+ void (*rx_mmc_int)(struct xlgmac_pdata *pdata);
+ void (*tx_mmc_int)(struct xlgmac_pdata *pdata);
+ void (*read_mmc_stats)(struct xlgmac_pdata *pdata);
+
+ /* For Receive Side Scaling */
+ int (*enable_rss)(struct xlgmac_pdata *pdata);
+ int (*disable_rss)(struct xlgmac_pdata *pdata);
+ int (*set_rss_hash_key)(struct xlgmac_pdata *pdata,
+ const u8 *key);
+ int (*set_rss_lookup_table)(struct xlgmac_pdata *pdata,
+ const u32 *table);
+};
+
+/* This structure contains flags that indicate what hardware features
+ * or configurations are present in the device.
+ */
+struct xlgmac_hw_features {
+ /* HW Version */
+ unsigned int version;
+
+ /* HW Feature Register0 */
+ unsigned int phyifsel; /* PHY interface support */
+ unsigned int vlhash; /* VLAN Hash Filter */
+ unsigned int sma; /* SMA(MDIO) Interface */
+ unsigned int rwk; /* PMT remote wake-up packet */
+ unsigned int mgk; /* PMT magic packet */
+ unsigned int mmc; /* RMON module */
+ unsigned int aoe; /* ARP Offload */
+ unsigned int ts; /* IEEE 1588-2008 Advanced Timestamp */
+ unsigned int eee; /* Energy Efficient Ethernet */
+ unsigned int tx_coe; /* Tx Checksum Offload */
+ unsigned int rx_coe; /* Rx Checksum Offload */
+ unsigned int addn_mac; /* Additional MAC Addresses */
+ unsigned int ts_src; /* Timestamp Source */
+ unsigned int sa_vlan_ins; /* Source Address or VLAN Insertion */
+
+ /* HW Feature Register1 */
+ unsigned int rx_fifo_size; /* MTL Receive FIFO Size */
+ unsigned int tx_fifo_size; /* MTL Transmit FIFO Size */
+ unsigned int adv_ts_hi; /* Advance Timestamping High Word */
+ unsigned int dma_width; /* DMA width */
+ unsigned int dcb; /* DCB Feature */
+ unsigned int sph; /* Split Header Feature */
+ unsigned int tso; /* TCP Segmentation Offload */
+ unsigned int dma_debug; /* DMA Debug Registers */
+ unsigned int rss; /* Receive Side Scaling */
+ unsigned int tc_cnt; /* Number of Traffic Classes */
+ unsigned int hash_table_size; /* Hash Table Size */
+ unsigned int l3l4_filter_num; /* Number of L3-L4 Filters */
+
+ /* HW Feature Register2 */
+ unsigned int rx_q_cnt; /* Number of MTL Receive Queues */
+ unsigned int tx_q_cnt; /* Number of MTL Transmit Queues */
+ unsigned int rx_ch_cnt; /* Number of DMA Receive Channels */
+ unsigned int tx_ch_cnt; /* Number of DMA Transmit Channels */
+ unsigned int pps_out_num; /* Number of PPS outputs */
+ unsigned int aux_snap_num; /* Number of Aux snapshot inputs */
+};
+
+struct xlgmac_resources {
+ void __iomem *addr;
+ int irq;
+};
+
+struct xlgmac_pdata {
+ struct net_device *netdev;
+ struct device *dev;
+
+ struct xlgmac_hw_ops hw_ops;
+ struct xlgmac_desc_ops desc_ops;
+
+ /* Device statistics */
+ struct xlgmac_stats stats;
+
+ u32 msg_enable;
+
+ /* MAC registers base */
+ void __iomem *mac_regs;
+
+ /* Hardware features of the device */
+ struct xlgmac_hw_features hw_feat;
+
+ struct work_struct restart_work;
+
+ /* Rings for Tx/Rx on a DMA channel */
+ struct xlgmac_channel *channel_head;
+ unsigned int channel_count;
+ unsigned int tx_ring_count;
+ unsigned int rx_ring_count;
+ unsigned int tx_desc_count;
+ unsigned int rx_desc_count;
+ unsigned int tx_q_count;
+ unsigned int rx_q_count;
+
+ /* Tx/Rx common settings */
+ unsigned int pblx8;
+
+ /* Tx settings */
+ unsigned int tx_sf_mode;
+ unsigned int tx_threshold;
+ unsigned int tx_pbl;
+ unsigned int tx_osp_mode;
+
+ /* Rx settings */
+ unsigned int rx_sf_mode;
+ unsigned int rx_threshold;
+ unsigned int rx_pbl;
+
+ /* Tx coalescing settings */
+ unsigned int tx_usecs;
+ unsigned int tx_frames;
+
+ /* Rx coalescing settings */
+ unsigned int rx_riwt;
+ unsigned int rx_usecs;
+ unsigned int rx_frames;
+
+ /* Current Rx buffer size */
+ unsigned int rx_buf_size;
+
+ /* Flow control settings */
+ unsigned int tx_pause;
+ unsigned int rx_pause;
+
+ /* Device interrupt number */
+ int dev_irq;
+ unsigned int per_channel_irq;
+ int channel_irq[XLGMAC_MAX_DMA_CHANNELS];
+
+ /* Netdev related settings */
+ unsigned char mac_addr[ETH_ALEN];
+ netdev_features_t netdev_features;
+ struct napi_struct napi;
+
+ /* Filtering support */
+ unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
+
+ /* Device clocks */
+ unsigned long sysclk_rate;
+
+ /* RSS addressing mutex */
+ struct mutex rss_mutex;
+
+ /* Receive Side Scaling settings */
+ u8 rss_key[XLGMAC_RSS_HASH_KEY_SIZE];
+ u32 rss_table[XLGMAC_RSS_MAX_TABLE_SIZE];
+ u32 rss_options;
+
+ int phy_speed;
+
+ char drv_name[32];
+ char drv_ver[32];
+};
+
+void xlgmac_init_desc_ops(struct xlgmac_desc_ops *desc_ops);
+void xlgmac_init_hw_ops(struct xlgmac_hw_ops *hw_ops);
+const struct net_device_ops *xlgmac_get_netdev_ops(void);
+void xlgmac_dump_tx_desc(struct xlgmac_pdata *pdata,
+ struct xlgmac_ring *ring,
+ unsigned int idx,
+ unsigned int count,
+ unsigned int flag);
+void xlgmac_dump_rx_desc(struct xlgmac_pdata *pdata,
+ struct xlgmac_ring *ring,
+ unsigned int idx);
+void xlgmac_print_pkt(struct net_device *netdev,
+ struct sk_buff *skb, bool tx_rx);
+void xlgmac_get_all_hw_features(struct xlgmac_pdata *pdata);
+void xlgmac_print_all_hw_features(struct xlgmac_pdata *pdata);
+int xlgmac_drv_probe(struct device *dev,
+ struct xlgmac_resources *res);
+int xlgmac_drv_remove(struct device *dev);
+
+/* For debug prints */
+#ifdef XLGMAC_DEBUG
+#define XLGMAC_PR(fmt, args...) \
+ pr_alert("[%s,%d]:" fmt, __func__, __LINE__, ## args)
+#else
+#define XLGMAC_PR(x...) do { } while (0)
+#endif
+
+#endif /* __DWC_XLGMAC_H__ */
projects / linux-2.6-microblaze.git / commitdiff