diff options
Diffstat (limited to 'drivers/net/ethernet/ti/cpsw.c')
| -rw-r--r-- | drivers/net/ethernet/ti/cpsw.c | 1806 |
1 files changed, 1806 insertions, 0 deletions
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c new file mode 100644 index 0000000000..ca4d4548f8 --- /dev/null +++ b/drivers/net/ethernet/ti/cpsw.c @@ -0,0 +1,1806 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Texas Instruments Ethernet Switch Driver + * + * Copyright (C) 2012 Texas Instruments + * + */ + +#include <linux/kernel.h> +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/timer.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/irqreturn.h> +#include <linux/interrupt.h> +#include <linux/if_ether.h> +#include <linux/etherdevice.h> +#include <linux/netdevice.h> +#include <linux/net_tstamp.h> +#include <linux/phy.h> +#include <linux/phy/phy.h> +#include <linux/workqueue.h> +#include <linux/delay.h> +#include <linux/pm_runtime.h> +#include <linux/gpio/consumer.h> +#include <linux/of.h> +#include <linux/of_mdio.h> +#include <linux/of_net.h> +#include <linux/of_platform.h> +#include <linux/if_vlan.h> +#include <linux/kmemleak.h> +#include <linux/sys_soc.h> +#include <net/page_pool/helpers.h> +#include <linux/bpf.h> +#include <linux/bpf_trace.h> + +#include <linux/pinctrl/consumer.h> +#include <net/pkt_cls.h> + +#include "cpsw.h" +#include "cpsw_ale.h" +#include "cpsw_priv.h" +#include "cpsw_sl.h" +#include "cpts.h" +#include "davinci_cpdma.h" + +#include <net/pkt_sched.h> + +static int debug_level; +module_param(debug_level, int, 0); +MODULE_PARM_DESC(debug_level, "cpsw debug level (NETIF_MSG bits)"); + +static int ale_ageout = 10; +module_param(ale_ageout, int, 0); +MODULE_PARM_DESC(ale_ageout, "cpsw ale ageout interval (seconds)"); + +static int rx_packet_max = CPSW_MAX_PACKET_SIZE; +module_param(rx_packet_max, int, 0); +MODULE_PARM_DESC(rx_packet_max, "maximum receive packet size (bytes)"); + +static int descs_pool_size = CPSW_CPDMA_DESCS_POOL_SIZE_DEFAULT; +module_param(descs_pool_size, int, 0444); +MODULE_PARM_DESC(descs_pool_size, "Number of CPDMA CPPI descriptors in pool"); + +#define for_each_slave(priv, func, arg...) \ + do { \ + struct cpsw_slave *slave; \ + struct cpsw_common *cpsw = (priv)->cpsw; \ + int n; \ + if (cpsw->data.dual_emac) \ + (func)((cpsw)->slaves + priv->emac_port, ##arg);\ + else \ + for (n = cpsw->data.slaves, \ + slave = cpsw->slaves; \ + n; n--) \ + (func)(slave++, ##arg); \ + } while (0) + +static int cpsw_slave_index_priv(struct cpsw_common *cpsw, + struct cpsw_priv *priv) +{ + return cpsw->data.dual_emac ? priv->emac_port : cpsw->data.active_slave; +} + +static int cpsw_get_slave_port(u32 slave_num) +{ + return slave_num + 1; +} + +static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev, + __be16 proto, u16 vid); + +static void cpsw_set_promiscious(struct net_device *ndev, bool enable) +{ + struct cpsw_common *cpsw = ndev_to_cpsw(ndev); + struct cpsw_ale *ale = cpsw->ale; + int i; + + if (cpsw->data.dual_emac) { + bool flag = false; + + /* Enabling promiscuous mode for one interface will be + * common for both the interface as the interface shares + * the same hardware resource. + */ + for (i = 0; i < cpsw->data.slaves; i++) + if (cpsw->slaves[i].ndev->flags & IFF_PROMISC) + flag = true; + + if (!enable && flag) { + enable = true; + dev_err(&ndev->dev, "promiscuity not disabled as the other interface is still in promiscuity mode\n"); + } + + if (enable) { + /* Enable Bypass */ + cpsw_ale_control_set(ale, 0, ALE_BYPASS, 1); + + dev_dbg(&ndev->dev, "promiscuity enabled\n"); + } else { + /* Disable Bypass */ + cpsw_ale_control_set(ale, 0, ALE_BYPASS, 0); + dev_dbg(&ndev->dev, "promiscuity disabled\n"); + } + } else { + if (enable) { + unsigned long timeout = jiffies + HZ; + + /* Disable Learn for all ports (host is port 0 and slaves are port 1 and up */ + for (i = 0; i <= cpsw->data.slaves; i++) { + cpsw_ale_control_set(ale, i, + ALE_PORT_NOLEARN, 1); + cpsw_ale_control_set(ale, i, + ALE_PORT_NO_SA_UPDATE, 1); + } + + /* Clear All Untouched entries */ + cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1); + do { + cpu_relax(); + if (cpsw_ale_control_get(ale, 0, ALE_AGEOUT)) + break; + } while (time_after(timeout, jiffies)); + cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1); + + /* Clear all mcast from ALE */ + cpsw_ale_flush_multicast(ale, ALE_ALL_PORTS, -1); + __hw_addr_ref_unsync_dev(&ndev->mc, ndev, NULL); + + /* Flood All Unicast Packets to Host port */ + cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 1); + dev_dbg(&ndev->dev, "promiscuity enabled\n"); + } else { + /* Don't Flood All Unicast Packets to Host port */ + cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 0); + + /* Enable Learn for all ports (host is port 0 and slaves are port 1 and up */ + for (i = 0; i <= cpsw->data.slaves; i++) { + cpsw_ale_control_set(ale, i, + ALE_PORT_NOLEARN, 0); + cpsw_ale_control_set(ale, i, + ALE_PORT_NO_SA_UPDATE, 0); + } + dev_dbg(&ndev->dev, "promiscuity disabled\n"); + } + } +} + +/** + * cpsw_set_mc - adds multicast entry to the table if it's not added or deletes + * if it's not deleted + * @ndev: device to sync + * @addr: address to be added or deleted + * @vid: vlan id, if vid < 0 set/unset address for real device + * @add: add address if the flag is set or remove otherwise + */ +static int cpsw_set_mc(struct net_device *ndev, const u8 *addr, + int vid, int add) +{ + struct cpsw_priv *priv = netdev_priv(ndev); + struct cpsw_common *cpsw = priv->cpsw; + int mask, flags, ret; + + if (vid < 0) { + if (cpsw->data.dual_emac) + vid = cpsw->slaves[priv->emac_port].port_vlan; + else + vid = 0; + } + + mask = cpsw->data.dual_emac ? ALE_PORT_HOST : ALE_ALL_PORTS; + flags = vid ? ALE_VLAN : 0; + + if (add) + ret = cpsw_ale_add_mcast(cpsw->ale, addr, mask, flags, vid, 0); + else + ret = cpsw_ale_del_mcast(cpsw->ale, addr, 0, flags, vid); + + return ret; +} + +static int cpsw_update_vlan_mc(struct net_device *vdev, int vid, void *ctx) +{ + struct addr_sync_ctx *sync_ctx = ctx; + struct netdev_hw_addr *ha; + int found = 0, ret = 0; + + if (!vdev || !(vdev->flags & IFF_UP)) + return 0; + + /* vlan address is relevant if its sync_cnt != 0 */ + netdev_for_each_mc_addr(ha, vdev) { + if (ether_addr_equal(ha->addr, sync_ctx->addr)) { + found = ha->sync_cnt; + break; + } + } + + if (found) + sync_ctx->consumed++; + + if (sync_ctx->flush) { + if (!found) + cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0); + return 0; + } + + if (found) + ret = cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 1); + + return ret; +} + +static int cpsw_add_mc_addr(struct net_device *ndev, const u8 *addr, int num) +{ + struct addr_sync_ctx sync_ctx; + int ret; + + sync_ctx.consumed = 0; + sync_ctx.addr = addr; + sync_ctx.ndev = ndev; + sync_ctx.flush = 0; + + ret = vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx); + if (sync_ctx.consumed < num && !ret) + ret = cpsw_set_mc(ndev, addr, -1, 1); + + return ret; +} + +static int cpsw_del_mc_addr(struct net_device *ndev, const u8 *addr, int num) +{ + struct addr_sync_ctx sync_ctx; + + sync_ctx.consumed = 0; + sync_ctx.addr = addr; + sync_ctx.ndev = ndev; + sync_ctx.flush = 1; + + vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx); + if (sync_ctx.consumed == num) + cpsw_set_mc(ndev, addr, -1, 0); + + return 0; +} + +static int cpsw_purge_vlan_mc(struct net_device *vdev, int vid, void *ctx) +{ + struct addr_sync_ctx *sync_ctx = ctx; + struct netdev_hw_addr *ha; + int found = 0; + + if (!vdev || !(vdev->flags & IFF_UP)) + return 0; + + /* vlan address is relevant if its sync_cnt != 0 */ + netdev_for_each_mc_addr(ha, vdev) { + if (ether_addr_equal(ha->addr, sync_ctx->addr)) { + found = ha->sync_cnt; + break; + } + } + + if (!found) + return 0; + + sync_ctx->consumed++; + cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0); + return 0; +} + +static int cpsw_purge_all_mc(struct net_device *ndev, const u8 *addr, int num) +{ + struct addr_sync_ctx sync_ctx; + + sync_ctx.addr = addr; + sync_ctx.ndev = ndev; + sync_ctx.consumed = 0; + + vlan_for_each(ndev, cpsw_purge_vlan_mc, &sync_ctx); + if (sync_ctx.consumed < num) + cpsw_set_mc(ndev, addr, -1, 0); + + return 0; +} + +static void cpsw_ndo_set_rx_mode(struct net_device *ndev) +{ + struct cpsw_priv *priv = netdev_priv(ndev); + struct cpsw_common *cpsw = priv->cpsw; + int slave_port = -1; + + if (cpsw->data.dual_emac) + slave_port = priv->emac_port + 1; + + if (ndev->flags & IFF_PROMISC) { + /* Enable promiscuous mode */ + cpsw_set_promiscious(ndev, true); + cpsw_ale_set_allmulti(cpsw->ale, IFF_ALLMULTI, slave_port); + return; + } else { + /* Disable promiscuous mode */ + cpsw_set_promiscious(ndev, false); + } + + /* Restore allmulti on vlans if necessary */ + cpsw_ale_set_allmulti(cpsw->ale, + ndev->flags & IFF_ALLMULTI, slave_port); + + /* add/remove mcast address either for real netdev or for vlan */ + __hw_addr_ref_sync_dev(&ndev->mc, ndev, cpsw_add_mc_addr, + cpsw_del_mc_addr); +} + +static unsigned int cpsw_rxbuf_total_len(unsigned int len) +{ + len += CPSW_HEADROOM_NA; + len += SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); + + return SKB_DATA_ALIGN(len); +} + +static void cpsw_rx_handler(void *token, int len, int status) +{ + struct page *new_page, *page = token; + void *pa = page_address(page); + struct cpsw_meta_xdp *xmeta = pa + CPSW_XMETA_OFFSET; + struct cpsw_common *cpsw = ndev_to_cpsw(xmeta->ndev); + int pkt_size = cpsw->rx_packet_max; + int ret = 0, port, ch = xmeta->ch; + int headroom = CPSW_HEADROOM_NA; + struct net_device *ndev = xmeta->ndev; + struct cpsw_priv *priv; + struct page_pool *pool; + struct sk_buff *skb; + struct xdp_buff xdp; + dma_addr_t dma; + + if (cpsw->data.dual_emac && status >= 0) { + port = CPDMA_RX_SOURCE_PORT(status); + if (port) + ndev = cpsw->slaves[--port].ndev; + } + + priv = netdev_priv(ndev); + pool = cpsw->page_pool[ch]; + if (unlikely(status < 0) || unlikely(!netif_running(ndev))) { + /* In dual emac mode check for all interfaces */ + if (cpsw->data.dual_emac && cpsw->usage_count && + (status >= 0)) { + /* The packet received is for the interface which + * is already down and the other interface is up + * and running, instead of freeing which results + * in reducing of the number of rx descriptor in + * DMA engine, requeue page back to cpdma. + */ + new_page = page; + goto requeue; + } + + /* the interface is going down, pages are purged */ + page_pool_recycle_direct(pool, page); + return; + } + + new_page = page_pool_dev_alloc_pages(pool); + if (unlikely(!new_page)) { + new_page = page; + ndev->stats.rx_dropped++; + goto requeue; + } + + if (priv->xdp_prog) { + int size = len; + + xdp_init_buff(&xdp, PAGE_SIZE, &priv->xdp_rxq[ch]); + if (status & CPDMA_RX_VLAN_ENCAP) { + headroom += CPSW_RX_VLAN_ENCAP_HDR_SIZE; + size -= CPSW_RX_VLAN_ENCAP_HDR_SIZE; + } + + xdp_prepare_buff(&xdp, pa, headroom, size, false); + + port = priv->emac_port + cpsw->data.dual_emac; + ret = cpsw_run_xdp(priv, ch, &xdp, page, port, &len); + if (ret != CPSW_XDP_PASS) + goto requeue; + + headroom = xdp.data - xdp.data_hard_start; + + /* XDP prog can modify vlan tag, so can't use encap header */ + status &= ~CPDMA_RX_VLAN_ENCAP; + } + + /* pass skb to netstack if no XDP prog or returned XDP_PASS */ + skb = build_skb(pa, cpsw_rxbuf_total_len(pkt_size)); + if (!skb) { + ndev->stats.rx_dropped++; + page_pool_recycle_direct(pool, page); + goto requeue; + } + + skb_reserve(skb, headroom); + skb_put(skb, len); + skb->dev = ndev; + if (status & CPDMA_RX_VLAN_ENCAP) + cpsw_rx_vlan_encap(skb); + if (priv->rx_ts_enabled) + cpts_rx_timestamp(cpsw->cpts, skb); + skb->protocol = eth_type_trans(skb, ndev); + + /* mark skb for recycling */ + skb_mark_for_recycle(skb); + netif_receive_skb(skb); + + ndev->stats.rx_bytes += len; + ndev->stats.rx_packets++; + +requeue: + xmeta = page_address(new_page) + CPSW_XMETA_OFFSET; + xmeta->ndev = ndev; + xmeta->ch = ch; + + dma = page_pool_get_dma_addr(new_page) + CPSW_HEADROOM_NA; + ret = cpdma_chan_submit_mapped(cpsw->rxv[ch].ch, new_page, dma, + pkt_size, 0); + if (ret < 0) { + WARN_ON(ret == -ENOMEM); + page_pool_recycle_direct(pool, new_page); + } +} + +static void _cpsw_adjust_link(struct cpsw_slave *slave, + struct cpsw_priv *priv, bool *link) +{ + struct phy_device *phy = slave->phy; + u32 mac_control = 0; + u32 slave_port; + struct cpsw_common *cpsw = priv->cpsw; + + if (!phy) + return; + + slave_port = cpsw_get_slave_port(slave->slave_num); + + if (phy->link) { + mac_control = CPSW_SL_CTL_GMII_EN; + + if (phy->speed == 1000) + mac_control |= CPSW_SL_CTL_GIG; + if (phy->duplex) + mac_control |= CPSW_SL_CTL_FULLDUPLEX; + + /* set speed_in input in case RMII mode is used in 100Mbps */ + if (phy->speed == 100) + mac_control |= CPSW_SL_CTL_IFCTL_A; + /* in band mode only works in 10Mbps RGMII mode */ + else if ((phy->speed == 10) && phy_interface_is_rgmii(phy)) + mac_control |= CPSW_SL_CTL_EXT_EN; /* In Band mode */ + + if (priv->rx_pause) + mac_control |= CPSW_SL_CTL_RX_FLOW_EN; + + if (priv->tx_pause) + mac_control |= CPSW_SL_CTL_TX_FLOW_EN; + + if (mac_control != slave->mac_control) + cpsw_sl_ctl_set(slave->mac_sl, mac_control); + + /* enable forwarding */ + cpsw_ale_control_set(cpsw->ale, slave_port, + ALE_PORT_STATE, ALE_PORT_STATE_FORWARD); + + *link = true; + + if (priv->shp_cfg_speed && + priv->shp_cfg_speed != slave->phy->speed && + !cpsw_shp_is_off(priv)) + dev_warn(priv->dev, + "Speed was changed, CBS shaper speeds are changed!"); + } else { + mac_control = 0; + /* disable forwarding */ + cpsw_ale_control_set(cpsw->ale, slave_port, + ALE_PORT_STATE, ALE_PORT_STATE_DISABLE); + + cpsw_sl_wait_for_idle(slave->mac_sl, 100); + + cpsw_sl_ctl_reset(slave->mac_sl); + } + + if (mac_control != slave->mac_control) + phy_print_status(phy); + + slave->mac_control = mac_control; +} + +static void cpsw_adjust_link(struct net_device *ndev) +{ + struct cpsw_priv *priv = netdev_priv(ndev); + struct cpsw_common *cpsw = priv->cpsw; + bool link = false; + + for_each_slave(priv, _cpsw_adjust_link, priv, &link); + + if (link) { + if (cpsw_need_resplit(cpsw)) + cpsw_split_res(cpsw); + + netif_carrier_on(ndev); + if (netif_running(ndev)) + netif_tx_wake_all_queues(ndev); + } else { + netif_carrier_off(ndev); + netif_tx_stop_all_queues(ndev); + } +} + +static inline void cpsw_add_dual_emac_def_ale_entries( + struct cpsw_priv *priv, struct cpsw_slave *slave, + u32 slave_port) +{ + struct cpsw_common *cpsw = priv->cpsw; + u32 port_mask = 1 << slave_port | ALE_PORT_HOST; + + if (cpsw->version == CPSW_VERSION_1) + slave_write(slave, slave->port_vlan, CPSW1_PORT_VLAN); + else + slave_write(slave, slave->port_vlan, CPSW2_PORT_VLAN); + cpsw_ale_add_vlan(cpsw->ale, slave->port_vlan, port_mask, + port_mask, port_mask, 0); + cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast, + ALE_PORT_HOST, ALE_VLAN, slave->port_vlan, 0); + cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr, + HOST_PORT_NUM, ALE_VLAN | + ALE_SECURE, slave->port_vlan); + cpsw_ale_control_set(cpsw->ale, slave_port, + ALE_PORT_DROP_UNKNOWN_VLAN, 1); +} + +static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv) +{ + u32 slave_port; + struct phy_device *phy; + struct cpsw_common *cpsw = priv->cpsw; + + cpsw_sl_reset(slave->mac_sl, 100); + cpsw_sl_ctl_reset(slave->mac_sl); + + /* setup priority mapping */ + cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_PRI_MAP, + RX_PRIORITY_MAPPING); + + switch (cpsw->version) { + case CPSW_VERSION_1: + slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP); + /* Increase RX FIFO size to 5 for supporting fullduplex + * flow control mode + */ + slave_write(slave, + (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) | + CPSW_MAX_BLKS_RX, CPSW1_MAX_BLKS); + break; + case CPSW_VERSION_2: + case CPSW_VERSION_3: + case CPSW_VERSION_4: + slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP); + /* Increase RX FIFO size to 5 for supporting fullduplex + * flow control mode + */ + slave_write(slave, + (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) | + CPSW_MAX_BLKS_RX, CPSW2_MAX_BLKS); + break; + } + + /* setup max packet size, and mac address */ + cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_MAXLEN, + cpsw->rx_packet_max); + cpsw_set_slave_mac(slave, priv); + + slave->mac_control = 0; /* no link yet */ + + slave_port = cpsw_get_slave_port(slave->slave_num); + + if (cpsw->data.dual_emac) + cpsw_add_dual_emac_def_ale_entries(priv, slave, slave_port); + else + cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast, + 1 << slave_port, 0, 0, ALE_MCAST_FWD_2); + + if (slave->data->phy_node) { + phy = of_phy_connect(priv->ndev, slave->data->phy_node, + &cpsw_adjust_link, 0, slave->data->phy_if); + if (!phy) { + dev_err(priv->dev, "phy \"%pOF\" not found on slave %d\n", + slave->data->phy_node, + slave->slave_num); + return; + } + } else { + phy = phy_connect(priv->ndev, slave->data->phy_id, + &cpsw_adjust_link, slave->data->phy_if); + if (IS_ERR(phy)) { + dev_err(priv->dev, + "phy \"%s\" not found on slave %d, err %ld\n", + slave->data->phy_id, slave->slave_num, + PTR_ERR(phy)); + return; + } + } + + slave->phy = phy; + + phy_attached_info(slave->phy); + + phy_start(slave->phy); + + /* Configure GMII_SEL register */ + if (!IS_ERR(slave->data->ifphy)) + phy_set_mode_ext(slave->data->ifphy, PHY_MODE_ETHERNET, + slave->data->phy_if); + else + cpsw_phy_sel(cpsw->dev, slave->phy->interface, + slave->slave_num); +} + +static inline void cpsw_add_default_vlan(struct cpsw_priv *priv) +{ + struct cpsw_common *cpsw = priv->cpsw; + const int vlan = cpsw->data.default_vlan; + u32 reg; + int i; + int unreg_mcast_mask; + + reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN : + CPSW2_PORT_VLAN; + + writel(vlan, &cpsw->host_port_regs->port_vlan); + + for (i = 0; i < cpsw->data.slaves; i++) + slave_write(cpsw->slaves + i, vlan, reg); + + if (priv->ndev->flags & IFF_ALLMULTI) + unreg_mcast_mask = ALE_ALL_PORTS; + else + unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2; + + cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS, + ALE_ALL_PORTS, ALE_ALL_PORTS, + unreg_mcast_mask); +} + +static void cpsw_init_host_port(struct cpsw_priv *priv) +{ + u32 fifo_mode; + u32 control_reg; + struct cpsw_common *cpsw = priv->cpsw; + + /* soft reset the controller and initialize ale */ + soft_reset("cpsw", &cpsw->regs->soft_reset); + cpsw_ale_start(cpsw->ale); + + /* switch to vlan unaware mode */ + cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_VLAN_AWARE, + CPSW_ALE_VLAN_AWARE); + control_reg = readl(&cpsw->regs->control); + control_reg |= CPSW_VLAN_AWARE | CPSW_RX_VLAN_ENCAP; + writel(control_reg, &cpsw->regs->control); + fifo_mode = (cpsw->data.dual_emac) ? CPSW_FIFO_DUAL_MAC_MODE : + CPSW_FIFO_NORMAL_MODE; + writel(fifo_mode, &cpsw->host_port_regs->tx_in_ctl); + + /* setup host port priority mapping */ + writel_relaxed(CPDMA_TX_PRIORITY_MAP, + &cpsw->host_port_regs->cpdma_tx_pri_map); + writel_relaxed(0, &cpsw->host_port_regs->cpdma_rx_chan_map); + + cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, + ALE_PORT_STATE, ALE_PORT_STATE_FORWARD); + + if (!cpsw->data.dual_emac) { + cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM, + 0, 0); + cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast, + ALE_PORT_HOST, 0, 0, ALE_MCAST_FWD_2); + } +} + +static void cpsw_slave_stop(struct cpsw_slave *slave, struct cpsw_common *cpsw) +{ + u32 slave_port; + + slave_port = cpsw_get_slave_port(slave->slave_num); + + if (!slave->phy) + return; + phy_stop(slave->phy); + phy_disconnect(slave->phy); + slave->phy = NULL; + cpsw_ale_control_set(cpsw->ale, slave_port, + ALE_PORT_STATE, ALE_PORT_STATE_DISABLE); + cpsw_sl_reset(slave->mac_sl, 100); + cpsw_sl_ctl_reset(slave->mac_sl); +} + +static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg) +{ + struct cpsw_priv *priv = arg; + + if (!vdev) + return 0; + + cpsw_ndo_vlan_rx_add_vid(priv->ndev, 0, vid); + return 0; +} + +/* restore resources after port reset */ +static void cpsw_restore(struct cpsw_priv *priv) +{ + /* restore vlan configurations */ + vlan_for_each(priv->ndev, cpsw_restore_vlans, priv); + + /* restore MQPRIO offload */ + for_each_slave(priv, cpsw_mqprio_resume, priv); + + /* restore CBS offload */ + for_each_slave(priv, cpsw_cbs_resume, priv); +} + +static int cpsw_ndo_open(struct net_device *ndev) +{ + struct cpsw_priv *priv = netdev_priv(ndev); + struct cpsw_common *cpsw = priv->cpsw; + int ret; + u32 reg; + + ret = pm_runtime_resume_and_get(cpsw->dev); + if (ret < 0) + return ret; + + netif_carrier_off(ndev); + + /* Notify the stack of the actual queue counts. */ + ret = netif_set_real_num_tx_queues(ndev, cpsw->tx_ch_num); + if (ret) { + dev_err(priv->dev, "cannot set real number of tx queues\n"); + goto err_cleanup; + } + + ret = netif_set_real_num_rx_queues(ndev, cpsw->rx_ch_num); + if (ret) { + dev_err(priv->dev, "cannot set real number of rx queues\n"); + goto err_cleanup; + } + + reg = cpsw->version; + + dev_info(priv->dev, "initializing cpsw version %d.%d (%d)\n", + CPSW_MAJOR_VERSION(reg), CPSW_MINOR_VERSION(reg), + CPSW_RTL_VERSION(reg)); + + /* Initialize host and slave ports */ + if (!cpsw->usage_count) + cpsw_init_host_port(priv); + for_each_slave(priv, cpsw_slave_open, priv); + + /* Add default VLAN */ + if (!cpsw->data.dual_emac) + cpsw_add_default_vlan(priv); + else + cpsw_ale_add_vlan(cpsw->ale, cpsw->data.default_vlan, + ALE_ALL_PORTS, ALE_ALL_PORTS, 0, 0); + + /* initialize shared resources for every ndev */ + if (!cpsw->usage_count) { + /* disable priority elevation */ + writel_relaxed(0, &cpsw->regs->ptype); + + /* enable statistics collection only on all ports */ + writel_relaxed(0x7, &cpsw->regs->stat_port_en); + + /* Enable internal fifo flow control */ + writel(0x7, &cpsw->regs->flow_control); + + napi_enable(&cpsw->napi_rx); + napi_enable(&cpsw->napi_tx); + + if (cpsw->tx_irq_disabled) { + cpsw->tx_irq_disabled = false; + enable_irq(cpsw->irqs_table[1]); + } + + if (cpsw->rx_irq_disabled) { + cpsw->rx_irq_disabled = false; + enable_irq(cpsw->irqs_table[0]); + } + + /* create rxqs for both infs in dual mac as they use same pool + * and must be destroyed together when no users. + */ + ret = cpsw_create_xdp_rxqs(cpsw); + if (ret < 0) + goto err_cleanup; + + ret = cpsw_fill_rx_channels(priv); + if (ret < 0) + goto err_cleanup; + + if (cpsw->cpts) { + if (cpts_register(cpsw->cpts)) + dev_err(priv->dev, "error registering cpts device\n"); + else + writel(0x10, &cpsw->wr_regs->misc_en); + } + } + + cpsw_restore(priv); + + /* Enable Interrupt pacing if configured */ + if (cpsw->coal_intvl != 0) { + struct ethtool_coalesce coal; + + coal.rx_coalesce_usecs = cpsw->coal_intvl; + cpsw_set_coalesce(ndev, &coal, NULL, NULL); + } + + cpdma_ctlr_start(cpsw->dma); + cpsw_intr_enable(cpsw); + cpsw->usage_count++; + + return 0; + +err_cleanup: + if (!cpsw->usage_count) { + napi_disable(&cpsw->napi_rx); + napi_disable(&cpsw->napi_tx); + cpdma_ctlr_stop(cpsw->dma); + cpsw_destroy_xdp_rxqs(cpsw); + } + + for_each_slave(priv, cpsw_slave_stop, cpsw); + pm_runtime_put_sync(cpsw->dev); + netif_carrier_off(priv->ndev); + return ret; +} + +static int cpsw_ndo_stop(struct net_device *ndev) +{ + struct cpsw_priv *priv = netdev_priv(ndev); + struct cpsw_common *cpsw = priv->cpsw; + + cpsw_info(priv, ifdown, "shutting down cpsw device\n"); + __hw_addr_ref_unsync_dev(&ndev->mc, ndev, cpsw_purge_all_mc); + netif_tx_stop_all_queues(priv->ndev); + netif_carrier_off(priv->ndev); + + if (cpsw->usage_count <= 1) { + napi_disable(&cpsw->napi_rx); + napi_disable(&cpsw->napi_tx); + cpts_unregister(cpsw->cpts); + cpsw_intr_disable(cpsw); + cpdma_ctlr_stop(cpsw->dma); + cpsw_ale_stop(cpsw->ale); + cpsw_destroy_xdp_rxqs(cpsw); + } + for_each_slave(priv, cpsw_slave_stop, cpsw); + + if (cpsw_need_resplit(cpsw)) + cpsw_split_res(cpsw); + + cpsw->usage_count--; + pm_runtime_put_sync(cpsw->dev); + return 0; +} + +static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb, + struct net_device *ndev) +{ + struct cpsw_priv *priv = netdev_priv(ndev); + struct cpsw_common *cpsw = priv->cpsw; + struct cpts *cpts = cpsw->cpts; + struct netdev_queue *txq; + struct cpdma_chan *txch; + int ret, q_idx; + + if (skb_put_padto(skb, CPSW_MIN_PACKET_SIZE)) { + cpsw_err(priv, tx_err, "packet pad failed\n"); + ndev->stats.tx_dropped++; + return NET_XMIT_DROP; + } + + if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP && + priv->tx_ts_enabled && cpts_can_timestamp(cpts, skb)) + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + + q_idx = skb_get_queue_mapping(skb); + if (q_idx >= cpsw->tx_ch_num) + q_idx = q_idx % cpsw->tx_ch_num; + + txch = cpsw->txv[q_idx].ch; + txq = netdev_get_tx_queue(ndev, q_idx); + skb_tx_timestamp(skb); + ret = cpdma_chan_submit(txch, skb, skb->data, skb->len, + priv->emac_port + cpsw->data.dual_emac); + if (unlikely(ret != 0)) { + cpsw_err(priv, tx_err, "desc submit failed\n"); + goto fail; + } + + /* If there is no more tx desc left free then we need to + * tell the kernel to stop sending us tx frames. + */ + if (unlikely(!cpdma_check_free_tx_desc(txch))) { + netif_tx_stop_queue(txq); + + /* Barrier, so that stop_queue visible to other cpus */ + smp_mb__after_atomic(); + + if (cpdma_check_free_tx_desc(txch)) + netif_tx_wake_queue(txq); + } + + return NETDEV_TX_OK; +fail: + ndev->stats.tx_dropped++; + netif_tx_stop_queue(txq); + + /* Barrier, so that stop_queue visible to other cpus */ + smp_mb__after_atomic(); + + if (cpdma_check_free_tx_desc(txch)) + netif_tx_wake_queue(txq); + + return NETDEV_TX_BUSY; +} + +static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p) +{ + struct cpsw_priv *priv = netdev_priv(ndev); + struct sockaddr *addr = (struct sockaddr *)p; + struct cpsw_common *cpsw = priv->cpsw; + int flags = 0; + u16 vid = 0; + int ret; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + + ret = pm_runtime_resume_and_get(cpsw->dev); + if (ret < 0) + return ret; + + if (cpsw->data.dual_emac) { + vid = cpsw->slaves[priv->emac_port].port_vlan; + flags = ALE_VLAN; + } + + cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM, + flags, vid); + cpsw_ale_add_ucast(cpsw->ale, addr->sa_data, HOST_PORT_NUM, + flags, vid); + + memcpy(priv->mac_addr, addr->sa_data, ETH_ALEN); + eth_hw_addr_set(ndev, priv->mac_addr); + for_each_slave(priv, cpsw_set_slave_mac, priv); + + pm_runtime_put(cpsw->dev); + + return 0; +} + +static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv, + unsigned short vid) +{ + int ret; + int unreg_mcast_mask = 0; + int mcast_mask; + u32 port_mask; + struct cpsw_common *cpsw = priv->cpsw; + + if (cpsw->data.dual_emac) { + port_mask = (1 << (priv->emac_port + 1)) | ALE_PORT_HOST; + + mcast_mask = ALE_PORT_HOST; + if (priv->ndev->flags & IFF_ALLMULTI) + unreg_mcast_mask = mcast_mask; + } else { + port_mask = ALE_ALL_PORTS; + mcast_mask = port_mask; + + if (priv->ndev->flags & IFF_ALLMULTI) + unreg_mcast_mask = ALE_ALL_PORTS; + else + unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2; + } + + ret = cpsw_ale_add_vlan(cpsw->ale, vid, port_mask, 0, port_mask, + unreg_mcast_mask); + if (ret != 0) + return ret; + + ret = cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr, + HOST_PORT_NUM, ALE_VLAN, vid); + if (ret != 0) + goto clean_vid; + + ret = cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast, + mcast_mask, ALE_VLAN, vid, 0); + if (ret != 0) + goto clean_vlan_ucast; + return 0; + +clean_vlan_ucast: + cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, + HOST_PORT_NUM, ALE_VLAN, vid); +clean_vid: + cpsw_ale_del_vlan(cpsw->ale, vid, 0); + return ret; +} + +static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev, + __be16 proto, u16 vid) +{ + struct cpsw_priv *priv = netdev_priv(ndev); + struct cpsw_common *cpsw = priv->cpsw; + int ret; + + if (vid == cpsw->data.default_vlan) + return 0; + + ret = pm_runtime_resume_and_get(cpsw->dev); + if (ret < 0) + return ret; + + if (cpsw->data.dual_emac) { + /* In dual EMAC, reserved VLAN id should not be used for + * creating VLAN interfaces as this can break the dual + * EMAC port separation + */ + int i; + + for (i = 0; i < cpsw->data.slaves; i++) { + if (vid == cpsw->slaves[i].port_vlan) { + ret = -EINVAL; + goto err; + } + } + } + + dev_info(priv->dev, "Adding vlanid %d to vlan filter\n", vid); + ret = cpsw_add_vlan_ale_entry(priv, vid); +err: + pm_runtime_put(cpsw->dev); + return ret; +} + +static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev, + __be16 proto, u16 vid) +{ + struct cpsw_priv *priv = netdev_priv(ndev); + struct cpsw_common *cpsw = priv->cpsw; + int ret; + + if (vid == cpsw->data.default_vlan) + return 0; + + ret = pm_runtime_resume_and_get(cpsw->dev); + if (ret < 0) + return ret; + + if (cpsw->data.dual_emac) { + int i; + + for (i = 0; i < cpsw->data.slaves; i++) { + if (vid == cpsw->slaves[i].port_vlan) + goto err; + } + } + + dev_info(priv->dev, "removing vlanid %d from vlan filter\n", vid); + ret = cpsw_ale_del_vlan(cpsw->ale, vid, 0); + ret |= cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, + HOST_PORT_NUM, ALE_VLAN, vid); + ret |= cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast, + 0, ALE_VLAN, vid); + ret |= cpsw_ale_flush_multicast(cpsw->ale, ALE_PORT_HOST, vid); +err: + pm_runtime_put(cpsw->dev); + return ret; +} + +static int cpsw_ndo_xdp_xmit(struct net_device *ndev, int n, + struct xdp_frame **frames, u32 flags) +{ + struct cpsw_priv *priv = netdev_priv(ndev); + struct cpsw_common *cpsw = priv->cpsw; + struct xdp_frame *xdpf; + int i, nxmit = 0, port; + + if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) + return -EINVAL; + + for (i = 0; i < n; i++) { + xdpf = frames[i]; + if (xdpf->len < CPSW_MIN_PACKET_SIZE) + break; + + port = priv->emac_port + cpsw->data.dual_emac; + if (cpsw_xdp_tx_frame(priv, xdpf, NULL, port)) + break; + nxmit++; + } + + return nxmit; +} + +#ifdef CONFIG_NET_POLL_CONTROLLER +static void cpsw_ndo_poll_controller(struct net_device *ndev) +{ + struct cpsw_common *cpsw = ndev_to_cpsw(ndev); + + cpsw_intr_disable(cpsw); + cpsw_rx_interrupt(cpsw->irqs_table[0], cpsw); + cpsw_tx_interrupt(cpsw->irqs_table[1], cpsw); + cpsw_intr_enable(cpsw); +} +#endif + +static const struct net_device_ops cpsw_netdev_ops = { + .ndo_open = cpsw_ndo_open, + .ndo_stop = cpsw_ndo_stop, + .ndo_start_xmit = cpsw_ndo_start_xmit, + .ndo_set_mac_address = cpsw_ndo_set_mac_address, + .ndo_eth_ioctl = cpsw_ndo_ioctl, + .ndo_validate_addr = eth_validate_addr, + .ndo_tx_timeout = cpsw_ndo_tx_timeout, + .ndo_set_rx_mode = cpsw_ndo_set_rx_mode, + .ndo_set_tx_maxrate = cpsw_ndo_set_tx_maxrate, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = cpsw_ndo_poll_controller, +#endif + .ndo_vlan_rx_add_vid = cpsw_ndo_vlan_rx_add_vid, + .ndo_vlan_rx_kill_vid = cpsw_ndo_vlan_rx_kill_vid, + .ndo_setup_tc = cpsw_ndo_setup_tc, + .ndo_bpf = cpsw_ndo_bpf, + .ndo_xdp_xmit = cpsw_ndo_xdp_xmit, +}; + +static void cpsw_get_drvinfo(struct net_device *ndev, + struct ethtool_drvinfo *info) +{ + struct cpsw_common *cpsw = ndev_to_cpsw(ndev); + struct platform_device *pdev = to_platform_device(cpsw->dev); + + strscpy(info->driver, "cpsw", sizeof(info->driver)); + strscpy(info->version, "1.0", sizeof(info->version)); + strscpy(info->bus_info, pdev->name, sizeof(info->bus_info)); +} + +static int cpsw_set_pauseparam(struct net_device *ndev, + struct ethtool_pauseparam *pause) +{ + struct cpsw_priv *priv = netdev_priv(ndev); + bool link; + + priv->rx_pause = pause->rx_pause ? true : false; + priv->tx_pause = pause->tx_pause ? true : false; + + for_each_slave(priv, _cpsw_adjust_link, priv, &link); + return 0; +} + +static int cpsw_set_channels(struct net_device *ndev, + struct ethtool_channels *chs) +{ + return cpsw_set_channels_common(ndev, chs, cpsw_rx_handler); +} + +static const struct ethtool_ops cpsw_ethtool_ops = { + .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS, + .get_drvinfo = cpsw_get_drvinfo, + .get_msglevel = cpsw_get_msglevel, + .set_msglevel = cpsw_set_msglevel, + .get_link = ethtool_op_get_link, + .get_ts_info = cpsw_get_ts_info, + .get_coalesce = cpsw_get_coalesce, + .set_coalesce = cpsw_set_coalesce, + .get_sset_count = cpsw_get_sset_count, + .get_strings = cpsw_get_strings, + .get_ethtool_stats = cpsw_get_ethtool_stats, + .get_pauseparam = cpsw_get_pauseparam, + .set_pauseparam = cpsw_set_pauseparam, + .get_wol = cpsw_get_wol, + .set_wol = cpsw_set_wol, + .get_regs_len = cpsw_get_regs_len, + .get_regs = cpsw_get_regs, + .begin = cpsw_ethtool_op_begin, + .complete = cpsw_ethtool_op_complete, + .get_channels = cpsw_get_channels, + .set_channels = cpsw_set_channels, + .get_link_ksettings = cpsw_get_link_ksettings, + .set_link_ksettings = cpsw_set_link_ksettings, + .get_eee = cpsw_get_eee, + .set_eee = cpsw_set_eee, + .nway_reset = cpsw_nway_reset, + .get_ringparam = cpsw_get_ringparam, + .set_ringparam = cpsw_set_ringparam, +}; + +static int cpsw_probe_dt(struct cpsw_platform_data *data, + struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + struct device_node *slave_node; + int i = 0, ret; + u32 prop; + + if (!node) + return -EINVAL; + + if (of_property_read_u32(node, "slaves", &prop)) { + dev_err(&pdev->dev, "Missing slaves property in the DT.\n"); + return -EINVAL; + } + data->slaves = prop; + + if (of_property_read_u32(node, "active_slave", &prop)) { + dev_err(&pdev->dev, "Missing active_slave property in the DT.\n"); + return -EINVAL; + } + data->active_slave = prop; + + data->slave_data = devm_kcalloc(&pdev->dev, + data->slaves, + sizeof(struct cpsw_slave_data), + GFP_KERNEL); + if (!data->slave_data) + return -ENOMEM; + + if (of_property_read_u32(node, "cpdma_channels", &prop)) { + dev_err(&pdev->dev, "Missing cpdma_channels property in the DT.\n"); + return -EINVAL; + } + data->channels = prop; + + if (of_property_read_u32(node, "bd_ram_size", &prop)) { + dev_err(&pdev->dev, "Missing bd_ram_size property in the DT.\n"); + return -EINVAL; + } + data->bd_ram_size = prop; + + if (of_property_read_u32(node, "mac_control", &prop)) { + dev_err(&pdev->dev, "Missing mac_control property in the DT.\n"); + return -EINVAL; + } + data->mac_control = prop; + + if (of_property_read_bool(node, "dual_emac")) + data->dual_emac = true; + + /* + * Populate all the child nodes here... + */ + ret = of_platform_populate(node, NULL, NULL, &pdev->dev); + /* We do not want to force this, as in some cases may not have child */ + if (ret) + dev_warn(&pdev->dev, "Doesn't have any child node\n"); + + for_each_available_child_of_node(node, slave_node) { + struct cpsw_slave_data *slave_data = data->slave_data + i; + int lenp; + const __be32 *parp; + + /* This is no slave child node, continue */ + if (!of_node_name_eq(slave_node, "slave")) + continue; + + slave_data->ifphy = devm_of_phy_get(&pdev->dev, slave_node, + NULL); + if (!IS_ENABLED(CONFIG_TI_CPSW_PHY_SEL) && + IS_ERR(slave_data->ifphy)) { + ret = PTR_ERR(slave_data->ifphy); + dev_err(&pdev->dev, + "%d: Error retrieving port phy: %d\n", i, ret); + goto err_node_put; + } + + slave_data->slave_node = slave_node; + slave_data->phy_node = of_parse_phandle(slave_node, + "phy-handle", 0); + parp = of_get_property(slave_node, "phy_id", &lenp); + if (slave_data->phy_node) { + dev_dbg(&pdev->dev, + "slave[%d] using phy-handle=\"%pOF\"\n", + i, slave_data->phy_node); + } else if (of_phy_is_fixed_link(slave_node)) { + /* In the case of a fixed PHY, the DT node associated + * to the PHY is the Ethernet MAC DT node. + */ + ret = of_phy_register_fixed_link(slave_node); + if (ret) { + dev_err_probe(&pdev->dev, ret, "failed to register fixed-link phy\n"); + goto err_node_put; + } + slave_data->phy_node = of_node_get(slave_node); + } else if (parp) { + u32 phyid; + struct device_node *mdio_node; + struct platform_device *mdio; + + if (lenp != (sizeof(__be32) * 2)) { + dev_err(&pdev->dev, "Invalid slave[%d] phy_id property\n", i); + goto no_phy_slave; + } + mdio_node = of_find_node_by_phandle(be32_to_cpup(parp)); + phyid = be32_to_cpup(parp+1); + mdio = of_find_device_by_node(mdio_node); + of_node_put(mdio_node); + if (!mdio) { + dev_err(&pdev->dev, "Missing mdio platform device\n"); + ret = -EINVAL; + goto err_node_put; + } + snprintf(slave_data->phy_id, sizeof(slave_data->phy_id), + PHY_ID_FMT, mdio->name, phyid); + put_device(&mdio->dev); + } else { + dev_err(&pdev->dev, + "No slave[%d] phy_id, phy-handle, or fixed-link property\n", + i); + goto no_phy_slave; + } + ret = of_get_phy_mode(slave_node, &slave_data->phy_if); + if (ret) { + dev_err(&pdev->dev, "Missing or malformed slave[%d] phy-mode property\n", + i); + goto err_node_put; + } + +no_phy_slave: + ret = of_get_mac_address(slave_node, slave_data->mac_addr); + if (ret) { + ret = ti_cm_get_macid(&pdev->dev, i, + slave_data->mac_addr); + if (ret) + goto err_node_put; + } + if (data->dual_emac) { + if (of_property_read_u32(slave_node, "dual_emac_res_vlan", + &prop)) { + dev_err(&pdev->dev, "Missing dual_emac_res_vlan in DT.\n"); + slave_data->dual_emac_res_vlan = i+1; + dev_err(&pdev->dev, "Using %d as Reserved VLAN for %d slave\n", + slave_data->dual_emac_res_vlan, i); + } else { + slave_data->dual_emac_res_vlan = prop; + } + } + + i++; + if (i == data->slaves) { + ret = 0; + goto err_node_put; + } + } + + return 0; + +err_node_put: + of_node_put(slave_node); + return ret; +} + +static void cpsw_remove_dt(struct platform_device *pdev) +{ + struct cpsw_common *cpsw = platform_get_drvdata(pdev); + struct cpsw_platform_data *data = &cpsw->data; + struct device_node *node = pdev->dev.of_node; + struct device_node *slave_node; + int i = 0; + + for_each_available_child_of_node(node, slave_node) { + struct cpsw_slave_data *slave_data = &data->slave_data[i]; + + if (!of_node_name_eq(slave_node, "slave")) + continue; + + if (of_phy_is_fixed_link(slave_node)) + of_phy_deregister_fixed_link(slave_node); + + of_node_put(slave_data->phy_node); + + i++; + if (i == data->slaves) { + of_node_put(slave_node); + break; + } + } + + of_platform_depopulate(&pdev->dev); +} + +static int cpsw_probe_dual_emac(struct cpsw_priv *priv) +{ + struct cpsw_common *cpsw = priv->cpsw; + struct cpsw_platform_data *data = &cpsw->data; + struct net_device *ndev; + struct cpsw_priv *priv_sl2; + int ret = 0; + + ndev = devm_alloc_etherdev_mqs(cpsw->dev, sizeof(struct cpsw_priv), + CPSW_MAX_QUEUES, CPSW_MAX_QUEUES); + if (!ndev) { + dev_err(cpsw->dev, "cpsw: error allocating net_device\n"); + return -ENOMEM; + } + + priv_sl2 = netdev_priv(ndev); + priv_sl2->cpsw = cpsw; + priv_sl2->ndev = ndev; + priv_sl2->dev = &ndev->dev; + priv_sl2->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG); + + if (is_valid_ether_addr(data->slave_data[1].mac_addr)) { + memcpy(priv_sl2->mac_addr, data->slave_data[1].mac_addr, + ETH_ALEN); + dev_info(cpsw->dev, "cpsw: Detected MACID = %pM\n", + priv_sl2->mac_addr); + } else { + eth_random_addr(priv_sl2->mac_addr); + dev_info(cpsw->dev, "cpsw: Random MACID = %pM\n", + priv_sl2->mac_addr); + } + eth_hw_addr_set(ndev, priv_sl2->mac_addr); + + priv_sl2->emac_port = 1; + cpsw->slaves[1].ndev = ndev; + ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX; + ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT | + NETDEV_XDP_ACT_NDO_XMIT; + + ndev->netdev_ops = &cpsw_netdev_ops; + ndev->ethtool_ops = &cpsw_ethtool_ops; + + /* register the network device */ + SET_NETDEV_DEV(ndev, cpsw->dev); + ndev->dev.of_node = cpsw->slaves[1].data->slave_node; + ret = register_netdev(ndev); + if (ret) + dev_err(cpsw->dev, "cpsw: error registering net device\n"); + + return ret; +} + +static const struct of_device_id cpsw_of_mtable[] = { + { .compatible = "ti,cpsw"}, + { .compatible = "ti,am335x-cpsw"}, + { .compatible = "ti,am4372-cpsw"}, + { .compatible = "ti,dra7-cpsw"}, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, cpsw_of_mtable); + +static const struct soc_device_attribute cpsw_soc_devices[] = { + { .family = "AM33xx", .revision = "ES1.0"}, + { /* sentinel */ } +}; + +static int cpsw_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct clk *clk; + struct cpsw_platform_data *data; + struct net_device *ndev; + struct cpsw_priv *priv; + void __iomem *ss_regs; + struct resource *ss_res; + struct gpio_descs *mode; + const struct soc_device_attribute *soc; + struct cpsw_common *cpsw; + int ret = 0, ch; + int irq; + + cpsw = devm_kzalloc(dev, sizeof(struct cpsw_common), GFP_KERNEL); + if (!cpsw) + return -ENOMEM; + + platform_set_drvdata(pdev, cpsw); + cpsw_slave_index = cpsw_slave_index_priv; + + cpsw->dev = dev; + + mode = devm_gpiod_get_array_optional(dev, "mode", GPIOD_OUT_LOW); + if (IS_ERR(mode)) { + ret = PTR_ERR(mode); + dev_err(dev, "gpio request failed, ret %d\n", ret); + return ret; + } + + clk = devm_clk_get(dev, "fck"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + dev_err(dev, "fck is not found %d\n", ret); + return ret; + } + cpsw->bus_freq_mhz = clk_get_rate(clk) / 1000000; + + ss_regs = devm_platform_get_and_ioremap_resource(pdev, 0, &ss_res); + if (IS_ERR(ss_regs)) + return PTR_ERR(ss_regs); + cpsw->regs = ss_regs; + + cpsw->wr_regs = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(cpsw->wr_regs)) + return PTR_ERR(cpsw->wr_regs); + + /* RX IRQ */ + irq = platform_get_irq(pdev, 1); + if (irq < 0) + return irq; + cpsw->irqs_table[0] = irq; + + /* TX IRQ */ + irq = platform_get_irq(pdev, 2); + if (irq < 0) + return irq; + cpsw->irqs_table[1] = irq; + + /* get misc irq*/ + irq = platform_get_irq(pdev, 3); + if (irq <= 0) + return irq; + cpsw->misc_irq = irq; + + /* + * This may be required here for child devices. + */ + pm_runtime_enable(dev); + + /* Need to enable clocks with runtime PM api to access module + * registers + */ + ret = pm_runtime_resume_and_get(dev); + if (ret < 0) + goto clean_runtime_disable_ret; + + ret = cpsw_probe_dt(&cpsw->data, pdev); + if (ret) + goto clean_dt_ret; + + soc = soc_device_match(cpsw_soc_devices); + if (soc) + cpsw->quirk_irq = true; + + data = &cpsw->data; + cpsw->slaves = devm_kcalloc(dev, + data->slaves, sizeof(struct cpsw_slave), + GFP_KERNEL); + if (!cpsw->slaves) { + ret = -ENOMEM; + goto clean_dt_ret; + } + + cpsw->rx_packet_max = max(rx_packet_max, CPSW_MAX_PACKET_SIZE); + cpsw->descs_pool_size = descs_pool_size; + + ret = cpsw_init_common(cpsw, ss_regs, ale_ageout, + ss_res->start + CPSW2_BD_OFFSET, + descs_pool_size); + if (ret) + goto clean_dt_ret; + + ch = cpsw->quirk_irq ? 0 : 7; + cpsw->txv[0].ch = cpdma_chan_create(cpsw->dma, ch, cpsw_tx_handler, 0); + if (IS_ERR(cpsw->txv[0].ch)) { + dev_err(dev, "error initializing tx dma channel\n"); + ret = PTR_ERR(cpsw->txv[0].ch); + goto clean_cpts; + } + + cpsw->rxv[0].ch = cpdma_chan_create(cpsw->dma, 0, cpsw_rx_handler, 1); + if (IS_ERR(cpsw->rxv[0].ch)) { + dev_err(dev, "error initializing rx dma channel\n"); + ret = PTR_ERR(cpsw->rxv[0].ch); + goto clean_cpts; + } + cpsw_split_res(cpsw); + + /* setup netdev */ + ndev = devm_alloc_etherdev_mqs(dev, sizeof(struct cpsw_priv), + CPSW_MAX_QUEUES, CPSW_MAX_QUEUES); + if (!ndev) { + dev_err(dev, "error allocating net_device\n"); + ret = -ENOMEM; + goto clean_cpts; + } + + priv = netdev_priv(ndev); + priv->cpsw = cpsw; + priv->ndev = ndev; + priv->dev = dev; + priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG); + priv->emac_port = 0; + + if (is_valid_ether_addr(data->slave_data[0].mac_addr)) { + memcpy(priv->mac_addr, data->slave_data[0].mac_addr, ETH_ALEN); + dev_info(dev, "Detected MACID = %pM\n", priv->mac_addr); + } else { + eth_random_addr(priv->mac_addr); + dev_info(dev, "Random MACID = %pM\n", priv->mac_addr); + } + + eth_hw_addr_set(ndev, priv->mac_addr); + + cpsw->slaves[0].ndev = ndev; + + ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX; + ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT | + NETDEV_XDP_ACT_NDO_XMIT; + + ndev->netdev_ops = &cpsw_netdev_ops; + ndev->ethtool_ops = &cpsw_ethtool_ops; + netif_napi_add(ndev, &cpsw->napi_rx, + cpsw->quirk_irq ? cpsw_rx_poll : cpsw_rx_mq_poll); + netif_napi_add_tx(ndev, &cpsw->napi_tx, + cpsw->quirk_irq ? cpsw_tx_poll : cpsw_tx_mq_poll); + + /* register the network device */ + SET_NETDEV_DEV(ndev, dev); + ndev->dev.of_node = cpsw->slaves[0].data->slave_node; + ret = register_netdev(ndev); + if (ret) { + dev_err(dev, "error registering net device\n"); + ret = -ENODEV; + goto clean_cpts; + } + + if (cpsw->data.dual_emac) { + ret = cpsw_probe_dual_emac(priv); + if (ret) { + cpsw_err(priv, probe, "error probe slave 2 emac interface\n"); + goto clean_unregister_netdev_ret; + } + } + + /* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and + * MISC IRQs which are always kept disabled with this driver so + * we will not request them. + * + * If anyone wants to implement support for those, make sure to + * first request and append them to irqs_table array. + */ + ret = devm_request_irq(dev, cpsw->irqs_table[0], cpsw_rx_interrupt, + 0, dev_name(dev), cpsw); + if (ret < 0) { + dev_err(dev, "error attaching irq (%d)\n", ret); + goto clean_unregister_netdev_ret; + } + + + ret = devm_request_irq(dev, cpsw->irqs_table[1], cpsw_tx_interrupt, + 0, dev_name(&pdev->dev), cpsw); + if (ret < 0) { + dev_err(dev, "error attaching irq (%d)\n", ret); + goto clean_unregister_netdev_ret; + } + + if (!cpsw->cpts) + goto skip_cpts; + + ret = devm_request_irq(&pdev->dev, cpsw->misc_irq, cpsw_misc_interrupt, + 0, dev_name(&pdev->dev), cpsw); + if (ret < 0) { + dev_err(dev, "error attaching misc irq (%d)\n", ret); + goto clean_unregister_netdev_ret; + } + + /* Enable misc CPTS evnt_pend IRQ */ + cpts_set_irqpoll(cpsw->cpts, false); + +skip_cpts: + cpsw_notice(priv, probe, + "initialized device (regs %pa, irq %d, pool size %d)\n", + &ss_res->start, cpsw->irqs_table[0], descs_pool_size); + + pm_runtime_put(&pdev->dev); + + return 0; + +clean_unregister_netdev_ret: + unregister_netdev(ndev); +clean_cpts: + cpts_release(cpsw->cpts); + cpdma_ctlr_destroy(cpsw->dma); +clean_dt_ret: + cpsw_remove_dt(pdev); + pm_runtime_put_sync(&pdev->dev); +clean_runtime_disable_ret: + pm_runtime_disable(&pdev->dev); + return ret; +} + +static int cpsw_remove(struct platform_device *pdev) +{ + struct cpsw_common *cpsw = platform_get_drvdata(pdev); + int i, ret; + + ret = pm_runtime_resume_and_get(&pdev->dev); + if (ret < 0) + return ret; + + for (i = 0; i < cpsw->data.slaves; i++) + if (cpsw->slaves[i].ndev) + unregister_netdev(cpsw->slaves[i].ndev); + + cpts_release(cpsw->cpts); + cpdma_ctlr_destroy(cpsw->dma); + cpsw_remove_dt(pdev); + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int cpsw_suspend(struct device *dev) +{ + struct cpsw_common *cpsw = dev_get_drvdata(dev); + int i; + + rtnl_lock(); + + for (i = 0; i < cpsw->data.slaves; i++) + if (cpsw->slaves[i].ndev) + if (netif_running(cpsw->slaves[i].ndev)) + cpsw_ndo_stop(cpsw->slaves[i].ndev); + + rtnl_unlock(); + + /* Select sleep pin state */ + pinctrl_pm_select_sleep_state(dev); + + return 0; +} + +static int cpsw_resume(struct device *dev) +{ + struct cpsw_common *cpsw = dev_get_drvdata(dev); + int i; + + /* Select default pin state */ + pinctrl_pm_select_default_state(dev); + + /* shut up ASSERT_RTNL() warning in netif_set_real_num_tx/rx_queues */ + rtnl_lock(); + + for (i = 0; i < cpsw->data.slaves; i++) + if (cpsw->slaves[i].ndev) + if (netif_running(cpsw->slaves[i].ndev)) + cpsw_ndo_open(cpsw->slaves[i].ndev); + + rtnl_unlock(); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume); + +static struct platform_driver cpsw_driver = { + .driver = { + .name = "cpsw", + .pm = &cpsw_pm_ops, + .of_match_table = cpsw_of_mtable, + }, + .probe = cpsw_probe, + .remove = cpsw_remove, +}; + +module_platform_driver(cpsw_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Cyril Chemparathy <cyril@ti.com>"); +MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>"); +MODULE_DESCRIPTION("TI CPSW Ethernet driver"); |