--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+
+/* Texas Instruments ICSSG SR1.0 Ethernet Driver
+ *
+ * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
+ * Copyright (c) Siemens AG, 2024
+ *
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/genalloc.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/phy.h>
+#include <linux/remoteproc/pruss.h>
+#include <linux/pruss_driver.h>
+
+#include "icssg_prueth.h"
+#include "icssg_mii_rt.h"
+#include "../k3-cppi-desc-pool.h"
+
+#define PRUETH_MODULE_DESCRIPTION "PRUSS ICSSG SR1.0 Ethernet driver"
+
+/* SR1: Set buffer sizes for the pools. There are 8 internal queues
+ * implemented in firmware, but only 4 tx channels/threads in the Egress
+ * direction to firmware. Need a high priority queue for management
+ * messages since they shouldn't be blocked even during high traffic
+ * situation. So use Q0-Q2 as data queues and Q3 as management queue
+ * in the max case. However for ease of configuration, use the max
+ * data queue + 1 for management message if we are not using max
+ * case.
+ *
+ * Allocate 4 MTU buffers per data queue. Firmware requires
+ * pool sizes to be set for internal queues. Set the upper 5 queue
+ * pool size to min size of 128 bytes since there are only 3 tx
+ * data channels and management queue requires only minimum buffer.
+ * i.e lower queues are used by driver and highest priority queue
+ * from that is used for management message.
+ */
+
+static int emac_egress_buf_pool_size[] = {
+ PRUETH_EMAC_BUF_POOL_SIZE_SR1, PRUETH_EMAC_BUF_POOL_SIZE_SR1,
+ PRUETH_EMAC_BUF_POOL_SIZE_SR1, PRUETH_EMAC_BUF_POOL_MIN_SIZE_SR1,
+ PRUETH_EMAC_BUF_POOL_MIN_SIZE_SR1, PRUETH_EMAC_BUF_POOL_MIN_SIZE_SR1,
+ PRUETH_EMAC_BUF_POOL_MIN_SIZE_SR1, PRUETH_EMAC_BUF_POOL_MIN_SIZE_SR1
+};
+
+static void icssg_config_sr1(struct prueth *prueth, struct prueth_emac *emac,
+ int slice)
+{
+ struct icssg_sr1_config config;
+ void __iomem *va;
+ int i, index;
+
+ memset(&config, 0, sizeof(config));
+ config.addr_lo = cpu_to_le32(lower_32_bits(prueth->msmcram.pa));
+ config.addr_hi = cpu_to_le32(upper_32_bits(prueth->msmcram.pa));
+ config.rx_flow_id = cpu_to_le32(emac->rx_flow_id_base); /* flow id for host port */
+ config.rx_mgr_flow_id = cpu_to_le32(emac->rx_mgm_flow_id_base); /* for mgm ch */
+ config.rand_seed = cpu_to_le32(get_random_u32());
+
+ for (i = PRUETH_EMAC_BUF_POOL_START_SR1; i < PRUETH_NUM_BUF_POOLS_SR1; i++) {
+ index = i - PRUETH_EMAC_BUF_POOL_START_SR1;
+ config.tx_buf_sz[i] = cpu_to_le32(emac_egress_buf_pool_size[index]);
+ }
+
+ va = prueth->shram.va + slice * ICSSG_CONFIG_OFFSET_SLICE1;
+ memcpy_toio(va, &config, sizeof(config));
+
+ emac->speed = SPEED_1000;
+ emac->duplex = DUPLEX_FULL;
+}
+
+static int emac_send_command_sr1(struct prueth_emac *emac, u32 cmd)
+{
+ struct cppi5_host_desc_t *first_desc;
+ u32 pkt_len = sizeof(emac->cmd_data);
+ __le32 *data = emac->cmd_data;
+ dma_addr_t desc_dma, buf_dma;
+ struct prueth_tx_chn *tx_chn;
+ void **swdata;
+ int ret = 0;
+ u32 *epib;
+
+ netdev_dbg(emac->ndev, "Sending cmd %x\n", cmd);
+
+ /* only one command at a time allowed to firmware */
+ mutex_lock(&emac->cmd_lock);
+ data[0] = cpu_to_le32(cmd);
+
+ /* highest priority channel for management messages */
+ tx_chn = &emac->tx_chns[emac->tx_ch_num - 1];
+
+ /* Map the linear buffer */
+ buf_dma = dma_map_single(tx_chn->dma_dev, data, pkt_len, DMA_TO_DEVICE);
+ if (dma_mapping_error(tx_chn->dma_dev, buf_dma)) {
+ netdev_err(emac->ndev, "cmd %x: failed to map cmd buffer\n", cmd);
+ ret = -EINVAL;
+ goto err_unlock;
+ }
+
+ first_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool);
+ if (!first_desc) {
+ netdev_err(emac->ndev, "cmd %x: failed to allocate descriptor\n", cmd);
+ dma_unmap_single(tx_chn->dma_dev, buf_dma, pkt_len, DMA_TO_DEVICE);
+ ret = -ENOMEM;
+ goto err_unlock;
+ }
+
+ cppi5_hdesc_init(first_desc, CPPI5_INFO0_HDESC_EPIB_PRESENT,
+ PRUETH_NAV_PS_DATA_SIZE);
+ cppi5_hdesc_set_pkttype(first_desc, PRUETH_PKT_TYPE_CMD);
+ epib = first_desc->epib;
+ epib[0] = 0;
+ epib[1] = 0;
+
+ cppi5_hdesc_attach_buf(first_desc, buf_dma, pkt_len, buf_dma, pkt_len);
+ swdata = cppi5_hdesc_get_swdata(first_desc);
+ *swdata = data;
+
+ cppi5_hdesc_set_pktlen(first_desc, pkt_len);
+ desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool, first_desc);
+
+ /* send command */
+ reinit_completion(&emac->cmd_complete);
+ ret = k3_udma_glue_push_tx_chn(tx_chn->tx_chn, first_desc, desc_dma);
+ if (ret) {
+ netdev_err(emac->ndev, "cmd %x: push failed: %d\n", cmd, ret);
+ goto free_desc;
+ }
+ ret = wait_for_completion_timeout(&emac->cmd_complete, msecs_to_jiffies(100));
+ if (!ret)
+ netdev_err(emac->ndev, "cmd %x: completion timeout\n", cmd);
+
+ mutex_unlock(&emac->cmd_lock);
+
+ return ret;
+free_desc:
+ prueth_xmit_free(tx_chn, first_desc);
+err_unlock:
+ mutex_unlock(&emac->cmd_lock);
+
+ return ret;
+}
+
+static void icssg_config_set_speed_sr1(struct prueth_emac *emac)
+{
+ u32 cmd = ICSSG_PSTATE_SPEED_DUPLEX_CMD_SR1, val;
+ struct prueth *prueth = emac->prueth;
+ int slice = prueth_emac_slice(emac);
+
+ val = icssg_rgmii_get_speed(prueth->miig_rt, slice);
+ /* firmware expects speed settings in bit 2-1 */
+ val <<= 1;
+ cmd |= val;
+
+ val = icssg_rgmii_get_fullduplex(prueth->miig_rt, slice);
+ /* firmware expects full duplex settings in bit 3 */
+ val <<= 3;
+ cmd |= val;
+
+ emac_send_command_sr1(emac, cmd);
+}
+
+/* called back by PHY layer if there is change in link state of hw port*/
+static void emac_adjust_link_sr1(struct net_device *ndev)
+{
+ struct prueth_emac *emac = netdev_priv(ndev);
+ struct phy_device *phydev = ndev->phydev;
+ struct prueth *prueth = emac->prueth;
+ bool new_state = false;
+ unsigned long flags;
+
+ if (phydev->link) {
+ /* check the mode of operation - full/half duplex */
+ if (phydev->duplex != emac->duplex) {
+ new_state = true;
+ emac->duplex = phydev->duplex;
+ }
+ if (phydev->speed != emac->speed) {
+ new_state = true;
+ emac->speed = phydev->speed;
+ }
+ if (!emac->link) {
+ new_state = true;
+ emac->link = 1;
+ }
+ } else if (emac->link) {
+ new_state = true;
+ emac->link = 0;
+
+ /* f/w should support 100 & 1000 */
+ emac->speed = SPEED_1000;
+
+ /* half duplex may not be supported by f/w */
+ emac->duplex = DUPLEX_FULL;
+ }
+
+ if (new_state) {
+ phy_print_status(phydev);
+
+ /* update RGMII and MII configuration based on PHY negotiated
+ * values
+ */
+ if (emac->link) {
+ /* Set the RGMII cfg for gig en and full duplex */
+ icssg_update_rgmii_cfg(prueth->miig_rt, emac);
+
+ /* update the Tx IPG based on 100M/1G speed */
+ spin_lock_irqsave(&emac->lock, flags);
+ icssg_config_ipg(emac);
+ spin_unlock_irqrestore(&emac->lock, flags);
+ icssg_config_set_speed_sr1(emac);
+ }
+ }
+
+ if (emac->link) {
+ /* reactivate the transmit queue */
+ netif_tx_wake_all_queues(ndev);
+ } else {
+ netif_tx_stop_all_queues(ndev);
+ prueth_cleanup_tx_ts(emac);
+ }
+}
+
+static int emac_phy_connect(struct prueth_emac *emac)
+{
+ struct prueth *prueth = emac->prueth;
+ struct net_device *ndev = emac->ndev;
+ /* connect PHY */
+ ndev->phydev = of_phy_connect(emac->ndev, emac->phy_node,
+ &emac_adjust_link_sr1, 0,
+ emac->phy_if);
+ if (!ndev->phydev) {
+ dev_err(prueth->dev, "couldn't connect to phy %s\n",
+ emac->phy_node->full_name);
+ return -ENODEV;
+ }
+
+ if (!emac->half_duplex) {
+ dev_dbg(prueth->dev, "half duplex mode is not supported\n");
+ phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
+ }
+
+ /* Remove 100Mbits half-duplex due to RGMII misreporting connection
+ * as full duplex */
+ phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
+
+ /* remove unsupported modes */
+ phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
+ phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_Pause_BIT);
+ phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_Asym_Pause_BIT);
+
+ if (emac->phy_if == PHY_INTERFACE_MODE_MII)
+ phy_set_max_speed(ndev->phydev, SPEED_100);
+
+ return 0;
+}
+
+/* get one packet from requested flow_id
+ *
+ * Returns skb pointer if packet found else NULL
+ * Caller must free the returned skb.
+ */
+static struct sk_buff *prueth_process_rx_mgm(struct prueth_emac *emac,
+ u32 flow_id)
+{
+ struct prueth_rx_chn *rx_chn = &emac->rx_mgm_chn;
+ struct net_device *ndev = emac->ndev;
+ struct cppi5_host_desc_t *desc_rx;
+ struct sk_buff *skb, *new_skb;
+ dma_addr_t desc_dma, buf_dma;
+ u32 buf_dma_len, pkt_len;
+ void **swdata;
+ int ret;
+
+ ret = k3_udma_glue_pop_rx_chn(rx_chn->rx_chn, flow_id, &desc_dma);
+ if (ret) {
+ if (ret != -ENODATA)
+ netdev_err(ndev, "rx mgm pop: failed: %d\n", ret);
+ return NULL;
+ }
+
+ if (cppi5_desc_is_tdcm(desc_dma)) /* Teardown */
+ return NULL;
+
+ desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma);
+
+ /* Fix FW bug about incorrect PSDATA size */
+ if (cppi5_hdesc_get_psdata_size(desc_rx) != PRUETH_NAV_PS_DATA_SIZE) {
+ cppi5_hdesc_update_psdata_size(desc_rx,
+ PRUETH_NAV_PS_DATA_SIZE);
+ }
+
+ swdata = cppi5_hdesc_get_swdata(desc_rx);
+ skb = *swdata;
+ cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
+ pkt_len = cppi5_hdesc_get_pktlen(desc_rx);
+
+ dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE);
+ k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
+
+ new_skb = netdev_alloc_skb_ip_align(ndev, PRUETH_MAX_PKT_SIZE);
+ /* if allocation fails we drop the packet but push the
+ * descriptor back to the ring with old skb to prevent a stall
+ */
+ if (!new_skb) {
+ netdev_err(ndev,
+ "skb alloc failed, dropped mgm pkt from flow %d\n",
+ flow_id);
+ new_skb = skb;
+ skb = NULL; /* return NULL */
+ } else {
+ /* return the filled skb */
+ skb_put(skb, pkt_len);
+ }
+
+ /* queue another DMA */
+ ret = prueth_dma_rx_push(emac, new_skb, &emac->rx_mgm_chn);
+ if (WARN_ON(ret < 0))
+ dev_kfree_skb_any(new_skb);
+
+ return skb;
+}
+
+static void prueth_tx_ts_sr1(struct prueth_emac *emac,
+ struct emac_tx_ts_response_sr1 *tsr)
+{
+ struct skb_shared_hwtstamps ssh;
+ u32 hi_ts, lo_ts, cookie;
+ struct sk_buff *skb;
+ u64 ns;
+
+ hi_ts = le32_to_cpu(tsr->hi_ts);
+ lo_ts = le32_to_cpu(tsr->lo_ts);
+
+ ns = (u64)hi_ts << 32 | lo_ts;
+
+ cookie = le32_to_cpu(tsr->cookie);
+ if (cookie >= PRUETH_MAX_TX_TS_REQUESTS) {
+ netdev_dbg(emac->ndev, "Invalid TX TS cookie 0x%x\n",
+ cookie);
+ return;
+ }
+
+ skb = emac->tx_ts_skb[cookie];
+ emac->tx_ts_skb[cookie] = NULL; /* free slot */
+
+ memset(&ssh, 0, sizeof(ssh));
+ ssh.hwtstamp = ns_to_ktime(ns);
+
+ skb_tstamp_tx(skb, &ssh);
+ dev_consume_skb_any(skb);
+}
+
+static irqreturn_t prueth_rx_mgm_ts_thread_sr1(int irq, void *dev_id)
+{
+ struct prueth_emac *emac = dev_id;
+ struct sk_buff *skb;
+
+ skb = prueth_process_rx_mgm(emac, PRUETH_RX_MGM_FLOW_TIMESTAMP_SR1);
+ if (!skb)
+ return IRQ_NONE;
+
+ prueth_tx_ts_sr1(emac, (void *)skb->data);
+ dev_kfree_skb_any(skb);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t prueth_rx_mgm_rsp_thread(int irq, void *dev_id)
+{
+ struct prueth_emac *emac = dev_id;
+ struct sk_buff *skb;
+ u32 rsp;
+
+ skb = prueth_process_rx_mgm(emac, PRUETH_RX_MGM_FLOW_RESPONSE_SR1);
+ if (!skb)
+ return IRQ_NONE;
+
+ /* Process command response */
+ rsp = le32_to_cpu(*(__le32 *)skb->data) & 0xffff0000;
+ if (rsp == ICSSG_SHUTDOWN_CMD_SR1) {
+ netdev_dbg(emac->ndev, "f/w Shutdown cmd resp %x\n", rsp);
+ complete(&emac->cmd_complete);
+ } else if (rsp == ICSSG_PSTATE_SPEED_DUPLEX_CMD_SR1) {
+ netdev_dbg(emac->ndev, "f/w Speed/Duplex cmd rsp %x\n", rsp);
+ complete(&emac->cmd_complete);
+ }
+
+ dev_kfree_skb_any(skb);
+
+ return IRQ_HANDLED;
+}
+
+static struct icssg_firmwares icssg_sr1_emac_firmwares[] = {
+ {
+ .pru = "ti-pruss/am65x-pru0-prueth-fw.elf",
+ .rtu = "ti-pruss/am65x-rtu0-prueth-fw.elf",
+ },
+ {
+ .pru = "ti-pruss/am65x-pru1-prueth-fw.elf",
+ .rtu = "ti-pruss/am65x-rtu1-prueth-fw.elf",
+ }
+};
+
+static int prueth_emac_start(struct prueth *prueth, struct prueth_emac *emac)
+{
+ struct icssg_firmwares *firmwares;
+ struct device *dev = prueth->dev;
+ int slice, ret;
+
+ firmwares = icssg_sr1_emac_firmwares;
+
+ slice = prueth_emac_slice(emac);
+ if (slice < 0) {
+ netdev_err(emac->ndev, "invalid port\n");
+ return -EINVAL;
+ }
+
+ icssg_config_sr1(prueth, emac, slice);
+
+ ret = rproc_set_firmware(prueth->pru[slice], firmwares[slice].pru);
+ ret = rproc_boot(prueth->pru[slice]);
+ if (ret) {
+ dev_err(dev, "failed to boot PRU%d: %d\n", slice, ret);
+ return -EINVAL;
+ }
+
+ ret = rproc_set_firmware(prueth->rtu[slice], firmwares[slice].rtu);
+ ret = rproc_boot(prueth->rtu[slice]);
+ if (ret) {
+ dev_err(dev, "failed to boot RTU%d: %d\n", slice, ret);
+ goto halt_pru;
+ }
+
+ emac->fw_running = 1;
+ return 0;
+
+halt_pru:
+ rproc_shutdown(prueth->pru[slice]);
+
+ return ret;
+}
+
+/**
+ * emac_ndo_open - EMAC device open
+ * @ndev: network adapter device
+ *
+ * Called when system wants to start the interface.
+ *
+ * Return: 0 for a successful open, or appropriate error code
+ */
+static int emac_ndo_open(struct net_device *ndev)
+{
+ struct prueth_emac *emac = netdev_priv(ndev);
+ int num_data_chn = emac->tx_ch_num - 1;
+ struct prueth *prueth = emac->prueth;
+ int slice = prueth_emac_slice(emac);
+ struct device *dev = prueth->dev;
+ int max_rx_flows, rx_flow;
+ int ret, i;
+
+ /* clear SMEM and MSMC settings for all slices */
+ if (!prueth->emacs_initialized) {
+ memset_io(prueth->msmcram.va, 0, prueth->msmcram.size);
+ memset_io(prueth->shram.va, 0, ICSSG_CONFIG_OFFSET_SLICE1 * PRUETH_NUM_MACS);
+ }
+
+ /* set h/w MAC as user might have re-configured */
+ ether_addr_copy(emac->mac_addr, ndev->dev_addr);
+
+ icssg_class_set_mac_addr(prueth->miig_rt, slice, emac->mac_addr);
+
+ icssg_class_default(prueth->miig_rt, slice, 0, true);
+
+ /* Notify the stack of the actual queue counts. */
+ ret = netif_set_real_num_tx_queues(ndev, num_data_chn);
+ if (ret) {
+ dev_err(dev, "cannot set real number of tx queues\n");
+ return ret;
+ }
+
+ init_completion(&emac->cmd_complete);
+ ret = prueth_init_tx_chns(emac);
+ if (ret) {
+ dev_err(dev, "failed to init tx channel: %d\n", ret);
+ return ret;
+ }
+
+ max_rx_flows = PRUETH_MAX_RX_FLOWS_SR1;
+ ret = prueth_init_rx_chns(emac, &emac->rx_chns, "rx",
+ max_rx_flows, PRUETH_MAX_RX_DESC);
+ if (ret) {
+ dev_err(dev, "failed to init rx channel: %d\n", ret);
+ goto cleanup_tx;
+ }
+
+ ret = prueth_init_rx_chns(emac, &emac->rx_mgm_chn, "rxmgm",
+ PRUETH_MAX_RX_MGM_FLOWS_SR1,
+ PRUETH_MAX_RX_MGM_DESC_SR1);
+ if (ret) {
+ dev_err(dev, "failed to init rx mgmt channel: %d\n",
+ ret);
+ goto cleanup_rx;
+ }
+
+ ret = prueth_ndev_add_tx_napi(emac);
+ if (ret)
+ goto cleanup_rx_mgm;
+
+ /* we use only the highest priority flow for now i.e. @irq[3] */
+ rx_flow = PRUETH_RX_FLOW_DATA_SR1;
+ ret = request_irq(emac->rx_chns.irq[rx_flow], prueth_rx_irq,
+ IRQF_TRIGGER_HIGH, dev_name(dev), emac);
+ if (ret) {
+ dev_err(dev, "unable to request RX IRQ\n");
+ goto cleanup_napi;
+ }
+
+ ret = request_threaded_irq(emac->rx_mgm_chn.irq[PRUETH_RX_MGM_FLOW_RESPONSE_SR1],
+ NULL, prueth_rx_mgm_rsp_thread,
+ IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
+ dev_name(dev), emac);
+ if (ret) {
+ dev_err(dev, "unable to request RX Management RSP IRQ\n");
+ goto free_rx_irq;
+ }
+
+ ret = request_threaded_irq(emac->rx_mgm_chn.irq[PRUETH_RX_MGM_FLOW_TIMESTAMP_SR1],
+ NULL, prueth_rx_mgm_ts_thread_sr1,
+ IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
+ dev_name(dev), emac);
+ if (ret) {
+ dev_err(dev, "unable to request RX Management TS IRQ\n");
+ goto free_rx_mgm_rsp_irq;
+ }
+
+ /* reset and start PRU firmware */
+ ret = prueth_emac_start(prueth, emac);
+ if (ret)
+ goto free_rx_mgmt_ts_irq;
+
+ icssg_mii_update_mtu(prueth->mii_rt, slice, ndev->max_mtu);
+
+ /* Prepare RX */
+ ret = prueth_prepare_rx_chan(emac, &emac->rx_chns, PRUETH_MAX_PKT_SIZE);
+ if (ret)
+ goto stop;
+
+ ret = prueth_prepare_rx_chan(emac, &emac->rx_mgm_chn, 64);
+ if (ret)
+ goto reset_rx_chn;
+
+ ret = k3_udma_glue_enable_rx_chn(emac->rx_mgm_chn.rx_chn);
+ if (ret)
+ goto reset_rx_chn;
+
+ ret = k3_udma_glue_enable_rx_chn(emac->rx_chns.rx_chn);
+ if (ret)
+ goto reset_rx_mgm_chn;
+
+ for (i = 0; i < emac->tx_ch_num; i++) {
+ ret = k3_udma_glue_enable_tx_chn(emac->tx_chns[i].tx_chn);
+ if (ret)
+ goto reset_tx_chan;
+ }
+
+ /* Enable NAPI in Tx and Rx direction */
+ for (i = 0; i < emac->tx_ch_num; i++)
+ napi_enable(&emac->tx_chns[i].napi_tx);
+ napi_enable(&emac->napi_rx);
+
+ /* start PHY */
+ phy_start(ndev->phydev);
+
+ prueth->emacs_initialized++;
+
+ queue_work(system_long_wq, &emac->stats_work.work);
+
+ return 0;
+
+reset_tx_chan:
+ /* Since interface is not yet up, there is wouldn't be
+ * any SKB for completion. So set false to free_skb
+ */
+ prueth_reset_tx_chan(emac, i, false);
+reset_rx_mgm_chn:
+ prueth_reset_rx_chan(&emac->rx_mgm_chn,
+ PRUETH_MAX_RX_MGM_FLOWS_SR1, true);
+reset_rx_chn:
+ prueth_reset_rx_chan(&emac->rx_chns, max_rx_flows, false);
+stop:
+ prueth_emac_stop(emac);
+free_rx_mgmt_ts_irq:
+ free_irq(emac->rx_mgm_chn.irq[PRUETH_RX_MGM_FLOW_TIMESTAMP_SR1],
+ emac);
+free_rx_mgm_rsp_irq:
+ free_irq(emac->rx_mgm_chn.irq[PRUETH_RX_MGM_FLOW_RESPONSE_SR1],
+ emac);
+free_rx_irq:
+ free_irq(emac->rx_chns.irq[rx_flow], emac);
+cleanup_napi:
+ prueth_ndev_del_tx_napi(emac, emac->tx_ch_num);
+cleanup_rx_mgm:
+ prueth_cleanup_rx_chns(emac, &emac->rx_mgm_chn,
+ PRUETH_MAX_RX_MGM_FLOWS_SR1);
+cleanup_rx:
+ prueth_cleanup_rx_chns(emac, &emac->rx_chns, max_rx_flows);
+cleanup_tx:
+ prueth_cleanup_tx_chns(emac);
+
+ return ret;
+}
+
+/**
+ * emac_ndo_stop - EMAC device stop
+ * @ndev: network adapter device
+ *
+ * Called when system wants to stop or down the interface.
+ *
+ * Return: Always 0 (Success)
+ */
+static int emac_ndo_stop(struct net_device *ndev)
+{
+ struct prueth_emac *emac = netdev_priv(ndev);
+ int rx_flow = PRUETH_RX_FLOW_DATA_SR1;
+ struct prueth *prueth = emac->prueth;
+ int max_rx_flows;
+ int ret, i;
+
+ /* inform the upper layers. */
+ netif_tx_stop_all_queues(ndev);
+
+ /* block packets from wire */
+ if (ndev->phydev)
+ phy_stop(ndev->phydev);
+
+ icssg_class_disable(prueth->miig_rt, prueth_emac_slice(emac));
+
+ emac_send_command_sr1(emac, ICSSG_SHUTDOWN_CMD_SR1);
+
+ atomic_set(&emac->tdown_cnt, emac->tx_ch_num);
+ /* ensure new tdown_cnt value is visible */
+ smp_mb__after_atomic();
+ /* tear down and disable UDMA channels */
+ reinit_completion(&emac->tdown_complete);
+ for (i = 0; i < emac->tx_ch_num; i++)
+ k3_udma_glue_tdown_tx_chn(emac->tx_chns[i].tx_chn, false);
+
+ ret = wait_for_completion_timeout(&emac->tdown_complete,
+ msecs_to_jiffies(1000));
+ if (!ret)
+ netdev_err(ndev, "tx teardown timeout\n");
+
+ prueth_reset_tx_chan(emac, emac->tx_ch_num, true);
+ for (i = 0; i < emac->tx_ch_num; i++)
+ napi_disable(&emac->tx_chns[i].napi_tx);
+
+ max_rx_flows = PRUETH_MAX_RX_FLOWS_SR1;
+ k3_udma_glue_tdown_rx_chn(emac->rx_chns.rx_chn, true);
+
+ prueth_reset_rx_chan(&emac->rx_chns, max_rx_flows, true);
+ /* Teardown RX MGM channel */
+ k3_udma_glue_tdown_rx_chn(emac->rx_mgm_chn.rx_chn, true);
+ prueth_reset_rx_chan(&emac->rx_mgm_chn,
+ PRUETH_MAX_RX_MGM_FLOWS_SR1, true);
+
+ napi_disable(&emac->napi_rx);
+
+ /* Destroying the queued work in ndo_stop() */
+ cancel_delayed_work_sync(&emac->stats_work);
+
+ /* stop PRUs */
+ prueth_emac_stop(emac);
+
+ free_irq(emac->rx_mgm_chn.irq[PRUETH_RX_MGM_FLOW_TIMESTAMP_SR1], emac);
+ free_irq(emac->rx_mgm_chn.irq[PRUETH_RX_MGM_FLOW_RESPONSE_SR1], emac);
+ free_irq(emac->rx_chns.irq[rx_flow], emac);
+ prueth_ndev_del_tx_napi(emac, emac->tx_ch_num);
+ prueth_cleanup_tx_chns(emac);
+
+ prueth_cleanup_rx_chns(emac, &emac->rx_mgm_chn, PRUETH_MAX_RX_MGM_FLOWS_SR1);
+ prueth_cleanup_rx_chns(emac, &emac->rx_chns, max_rx_flows);
+
+ prueth->emacs_initialized--;
+
+ return 0;
+}
+
+static void emac_ndo_set_rx_mode_sr1(struct net_device *ndev)
+{
+ struct prueth_emac *emac = netdev_priv(ndev);
+ bool allmulti = ndev->flags & IFF_ALLMULTI;
+ bool promisc = ndev->flags & IFF_PROMISC;
+ struct prueth *prueth = emac->prueth;
+ int slice = prueth_emac_slice(emac);
+
+ if (promisc) {
+ icssg_class_promiscuous_sr1(prueth->miig_rt, slice);
+ return;
+ }
+
+ if (allmulti) {
+ icssg_class_default(prueth->miig_rt, slice, 1, true);
+ return;
+ }
+
+ icssg_class_default(prueth->miig_rt, slice, 0, true);
+ if (!netdev_mc_empty(ndev)) {
+ /* program multicast address list into Classifier */
+ icssg_class_add_mcast_sr1(prueth->miig_rt, slice, ndev);
+ }
+}
+
+static const struct net_device_ops emac_netdev_ops = {
+ .ndo_open = emac_ndo_open,
+ .ndo_stop = emac_ndo_stop,
+ .ndo_start_xmit = emac_ndo_start_xmit,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_tx_timeout = emac_ndo_tx_timeout,
+ .ndo_set_rx_mode = emac_ndo_set_rx_mode_sr1,
+ .ndo_eth_ioctl = emac_ndo_ioctl,
+ .ndo_get_stats64 = emac_ndo_get_stats64,
+ .ndo_get_phys_port_name = emac_ndo_get_phys_port_name,
+};
+
+static int prueth_netdev_init(struct prueth *prueth,
+ struct device_node *eth_node)
+{
+ struct prueth_emac *emac;
+ struct net_device *ndev;
+ enum prueth_port port;
+ enum prueth_mac mac;
+ /* Only enable one TX channel due to timeouts when
+ * using multiple channels */
+ int num_tx_chn = 1;
+ int ret;
+
+ port = prueth_node_port(eth_node);
+ if (port == PRUETH_PORT_INVALID)
+ return -EINVAL;
+
+ mac = prueth_node_mac(eth_node);
+ if (mac == PRUETH_MAC_INVALID)
+ return -EINVAL;
+
+ ndev = alloc_etherdev_mq(sizeof(*emac), num_tx_chn);
+ if (!ndev)
+ return -ENOMEM;
+
+ emac = netdev_priv(ndev);
+ emac->is_sr1 = 1;
+ emac->prueth = prueth;
+ emac->ndev = ndev;
+ emac->port_id = port;
+ emac->cmd_wq = create_singlethread_workqueue("icssg_cmd_wq");
+ if (!emac->cmd_wq) {
+ ret = -ENOMEM;
+ goto free_ndev;
+ }
+
+ INIT_DELAYED_WORK(&emac->stats_work, emac_stats_work_handler);
+
+ ret = pruss_request_mem_region(prueth->pruss,
+ port == PRUETH_PORT_MII0 ?
+ PRUSS_MEM_DRAM0 : PRUSS_MEM_DRAM1,
+ &emac->dram);
+ if (ret) {
+ dev_err(prueth->dev, "unable to get DRAM: %d\n", ret);
+ ret = -ENOMEM;
+ goto free_wq;
+ }
+
+ /* SR1.0 uses a dedicated high priority channel
+ * to send commands to the firmware
+ */
+ emac->tx_ch_num = 2;
+
+ SET_NETDEV_DEV(ndev, prueth->dev);
+ spin_lock_init(&emac->lock);
+ mutex_init(&emac->cmd_lock);
+
+ emac->phy_node = of_parse_phandle(eth_node, "phy-handle", 0);
+ if (!emac->phy_node && !of_phy_is_fixed_link(eth_node)) {
+ dev_err(prueth->dev, "couldn't find phy-handle\n");
+ ret = -ENODEV;
+ goto free;
+ } else if (of_phy_is_fixed_link(eth_node)) {
+ ret = of_phy_register_fixed_link(eth_node);
+ if (ret) {
+ ret = dev_err_probe(prueth->dev, ret,
+ "failed to register fixed-link phy\n");
+ goto free;
+ }
+
+ emac->phy_node = eth_node;
+ }
+
+ ret = of_get_phy_mode(eth_node, &emac->phy_if);
+ if (ret) {
+ dev_err(prueth->dev, "could not get phy-mode property\n");
+ goto free;
+ }
+
+ if (emac->phy_if != PHY_INTERFACE_MODE_MII &&
+ !phy_interface_mode_is_rgmii(emac->phy_if)) {
+ dev_err(prueth->dev, "PHY mode unsupported %s\n", phy_modes(emac->phy_if));
+ ret = -EINVAL;
+ goto free;
+ }
+
+ /* AM65 SR2.0 has TX Internal delay always enabled by hardware
+ * and it is not possible to disable TX Internal delay. The below
+ * switch case block describes how we handle different phy modes
+ * based on hardware restriction.
+ */
+ switch (emac->phy_if) {
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ emac->phy_if = PHY_INTERFACE_MODE_RGMII_RXID;
+ break;
+ case PHY_INTERFACE_MODE_RGMII_TXID:
+ emac->phy_if = PHY_INTERFACE_MODE_RGMII;
+ break;
+ case PHY_INTERFACE_MODE_RGMII:
+ case PHY_INTERFACE_MODE_RGMII_RXID:
+ dev_err(prueth->dev, "RGMII mode without TX delay is not supported");
+ ret = -EINVAL;
+ goto free;
+ default:
+ break;
+ }
+
+ /* get mac address from DT and set private and netdev addr */
+ ret = of_get_ethdev_address(eth_node, ndev);
+ if (!is_valid_ether_addr(ndev->dev_addr)) {
+ eth_hw_addr_random(ndev);
+ dev_warn(prueth->dev, "port %d: using random MAC addr: %pM\n",
+ port, ndev->dev_addr);
+ }
+ ether_addr_copy(emac->mac_addr, ndev->dev_addr);
+
+ ndev->min_mtu = PRUETH_MIN_PKT_SIZE;
+ ndev->max_mtu = PRUETH_MAX_MTU;
+ ndev->netdev_ops = &emac_netdev_ops;
+ ndev->ethtool_ops = &icssg_ethtool_ops;
+ ndev->hw_features = NETIF_F_SG;
+ ndev->features = ndev->hw_features;
+
+ netif_napi_add(ndev, &emac->napi_rx, emac_napi_rx_poll);
+ prueth->emac[mac] = emac;
+
+ return 0;
+
+free:
+ pruss_release_mem_region(prueth->pruss, &emac->dram);
+free_wq:
+ destroy_workqueue(emac->cmd_wq);
+free_ndev:
+ emac->ndev = NULL;
+ prueth->emac[mac] = NULL;
+ free_netdev(ndev);
+
+ return ret;
+}
+
+static int prueth_probe(struct platform_device *pdev)
+{
+ struct device_node *eth_node, *eth_ports_node;
+ struct device_node *eth0_node = NULL;
+ struct device_node *eth1_node = NULL;
+ struct device *dev = &pdev->dev;
+ struct device_node *np;
+ struct prueth *prueth;
+ struct pruss *pruss;
+ u32 msmc_ram_size;
+ int i, ret;
+
+ np = dev->of_node;
+
+ prueth = devm_kzalloc(dev, sizeof(*prueth), GFP_KERNEL);
+ if (!prueth)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, prueth);
+ prueth->pdev = pdev;
+ prueth->pdata = *(const struct prueth_pdata *)device_get_match_data(dev);
+
+ prueth->dev = dev;
+ eth_ports_node = of_get_child_by_name(np, "ethernet-ports");
+ if (!eth_ports_node)
+ return -ENOENT;
+
+ for_each_child_of_node(eth_ports_node, eth_node) {
+ u32 reg;
+
+ if (strcmp(eth_node->name, "port"))
+ continue;
+ ret = of_property_read_u32(eth_node, "reg", ®);
+ if (ret < 0) {
+ dev_err(dev, "%pOF error reading port_id %d\n",
+ eth_node, ret);
+ }
+
+ of_node_get(eth_node);
+
+ if (reg == 0) {
+ eth0_node = eth_node;
+ if (!of_device_is_available(eth0_node)) {
+ of_node_put(eth0_node);
+ eth0_node = NULL;
+ }
+ } else if (reg == 1) {
+ eth1_node = eth_node;
+ if (!of_device_is_available(eth1_node)) {
+ of_node_put(eth1_node);
+ eth1_node = NULL;
+ }
+ } else {
+ dev_err(dev, "port reg should be 0 or 1\n");
+ }
+ }
+
+ of_node_put(eth_ports_node);
+
+ /* At least one node must be present and available else we fail */
+ if (!eth0_node && !eth1_node) {
+ dev_err(dev, "neither port0 nor port1 node available\n");
+ return -ENODEV;
+ }
+
+ if (eth0_node == eth1_node) {
+ dev_err(dev, "port0 and port1 can't have same reg\n");
+ of_node_put(eth0_node);
+ return -ENODEV;
+ }
+
+ prueth->eth_node[PRUETH_MAC0] = eth0_node;
+ prueth->eth_node[PRUETH_MAC1] = eth1_node;
+
+ prueth->miig_rt = syscon_regmap_lookup_by_phandle(np, "ti,mii-g-rt");
+ if (IS_ERR(prueth->miig_rt)) {
+ dev_err(dev, "couldn't get ti,mii-g-rt syscon regmap\n");
+ return -ENODEV;
+ }
+
+ prueth->mii_rt = syscon_regmap_lookup_by_phandle(np, "ti,mii-rt");
+ if (IS_ERR(prueth->mii_rt)) {
+ dev_err(dev, "couldn't get ti,mii-rt syscon regmap\n");
+ return -ENODEV;
+ }
+
+ if (eth0_node) {
+ ret = prueth_get_cores(prueth, ICSS_SLICE0, true);
+ if (ret)
+ goto put_cores;
+ }
+
+ if (eth1_node) {
+ ret = prueth_get_cores(prueth, ICSS_SLICE1, true);
+ if (ret)
+ goto put_cores;
+ }
+
+ pruss = pruss_get(eth0_node ?
+ prueth->pru[ICSS_SLICE0] : prueth->pru[ICSS_SLICE1]);
+ if (IS_ERR(pruss)) {
+ ret = PTR_ERR(pruss);
+ dev_err(dev, "unable to get pruss handle\n");
+ goto put_cores;
+ }
+
+ prueth->pruss = pruss;
+
+ ret = pruss_request_mem_region(pruss, PRUSS_MEM_SHRD_RAM2,
+ &prueth->shram);
+ if (ret) {
+ dev_err(dev, "unable to get PRUSS SHRD RAM2: %d\n", ret);
+ goto put_pruss;
+ }
+
+ prueth->sram_pool = of_gen_pool_get(np, "sram", 0);
+ if (!prueth->sram_pool) {
+ dev_err(dev, "unable to get SRAM pool\n");
+ ret = -ENODEV;
+
+ goto put_mem;
+ }
+
+ msmc_ram_size = MSMC_RAM_SIZE_SR1;
+
+ prueth->msmcram.va = (void __iomem *)gen_pool_alloc(prueth->sram_pool,
+ msmc_ram_size);
+
+ if (!prueth->msmcram.va) {
+ ret = -ENOMEM;
+ dev_err(dev, "unable to allocate MSMC resource\n");
+ goto put_mem;
+ }
+ prueth->msmcram.pa = gen_pool_virt_to_phys(prueth->sram_pool,
+ (unsigned long)prueth->msmcram.va);
+ prueth->msmcram.size = msmc_ram_size;
+ memset_io(prueth->msmcram.va, 0, msmc_ram_size);
+ dev_dbg(dev, "sram: pa %llx va %p size %zx\n", prueth->msmcram.pa,
+ prueth->msmcram.va, prueth->msmcram.size);
+
+ if (eth0_node) {
+ ret = prueth_netdev_init(prueth, eth0_node);
+ if (ret) {
+ dev_err_probe(dev, ret, "netdev init %s failed\n",
+ eth0_node->name);
+ goto free_pool;
+ }
+
+ if (of_find_property(eth0_node, "ti,half-duplex-capable", NULL))
+ prueth->emac[PRUETH_MAC0]->half_duplex = 1;
+ }
+
+ if (eth1_node) {
+ ret = prueth_netdev_init(prueth, eth1_node);
+ if (ret) {
+ dev_err_probe(dev, ret, "netdev init %s failed\n",
+ eth1_node->name);
+ goto netdev_exit;
+ }
+
+ if (of_find_property(eth1_node, "ti,half-duplex-capable", NULL))
+ prueth->emac[PRUETH_MAC1]->half_duplex = 1;
+ }
+
+ /* register the network devices */
+ if (eth0_node) {
+ ret = register_netdev(prueth->emac[PRUETH_MAC0]->ndev);
+ if (ret) {
+ dev_err(dev, "can't register netdev for port MII0\n");
+ goto netdev_exit;
+ }
+
+ prueth->registered_netdevs[PRUETH_MAC0] = prueth->emac[PRUETH_MAC0]->ndev;
+ emac_phy_connect(prueth->emac[PRUETH_MAC0]);
+ phy_attached_info(prueth->emac[PRUETH_MAC0]->ndev->phydev);
+ }
+
+ if (eth1_node) {
+ ret = register_netdev(prueth->emac[PRUETH_MAC1]->ndev);
+ if (ret) {
+ dev_err(dev, "can't register netdev for port MII1\n");
+ goto netdev_unregister;
+ }
+
+ prueth->registered_netdevs[PRUETH_MAC1] = prueth->emac[PRUETH_MAC1]->ndev;
+ emac_phy_connect(prueth->emac[PRUETH_MAC1]);
+ phy_attached_info(prueth->emac[PRUETH_MAC1]->ndev->phydev);
+ }
+
+ dev_info(dev, "TI PRU SR1.0 ethernet driver initialized: %s EMAC mode\n",
+ (!eth0_node || !eth1_node) ? "single" : "dual");
+
+ if (eth1_node)
+ of_node_put(eth1_node);
+ if (eth0_node)
+ of_node_put(eth0_node);
+
+ return 0;
+
+netdev_unregister:
+ for (i = 0; i < PRUETH_NUM_MACS; i++) {
+ if (!prueth->registered_netdevs[i])
+ continue;
+
+ if (prueth->emac[i]->ndev->phydev) {
+ phy_disconnect(prueth->emac[i]->ndev->phydev);
+ prueth->emac[i]->ndev->phydev = NULL;
+ }
+ unregister_netdev(prueth->registered_netdevs[i]);
+ }
+
+netdev_exit:
+ for (i = 0; i < PRUETH_NUM_MACS; i++) {
+ eth_node = prueth->eth_node[i];
+ if (!eth_node)
+ continue;
+
+ prueth_netdev_exit(prueth, eth_node);
+ }
+
+free_pool:
+ gen_pool_free(prueth->sram_pool,
+ (unsigned long)prueth->msmcram.va, msmc_ram_size);
+
+put_mem:
+ pruss_release_mem_region(prueth->pruss, &prueth->shram);
+
+put_pruss:
+ pruss_put(prueth->pruss);
+
+put_cores:
+ if (eth1_node) {
+ prueth_put_cores(prueth, ICSS_SLICE1);
+ of_node_put(eth1_node);
+ }
+
+ if (eth0_node) {
+ prueth_put_cores(prueth, ICSS_SLICE0);
+ of_node_put(eth0_node);
+ }
+
+ return ret;
+}
+
+static void prueth_remove(struct platform_device *pdev)
+{
+ struct prueth *prueth = platform_get_drvdata(pdev);
+ struct device_node *eth_node;
+ int i;
+
+ for (i = 0; i < PRUETH_NUM_MACS; i++) {
+ if (!prueth->registered_netdevs[i])
+ continue;
+ phy_stop(prueth->emac[i]->ndev->phydev);
+ phy_disconnect(prueth->emac[i]->ndev->phydev);
+ prueth->emac[i]->ndev->phydev = NULL;
+ unregister_netdev(prueth->registered_netdevs[i]);
+ }
+
+ for (i = 0; i < PRUETH_NUM_MACS; i++) {
+ eth_node = prueth->eth_node[i];
+ if (!eth_node)
+ continue;
+
+ prueth_netdev_exit(prueth, eth_node);
+ }
+
+ gen_pool_free(prueth->sram_pool,
+ (unsigned long)prueth->msmcram.va,
+ MSMC_RAM_SIZE_SR1);
+
+ pruss_release_mem_region(prueth->pruss, &prueth->shram);
+
+ pruss_put(prueth->pruss);
+
+ if (prueth->eth_node[PRUETH_MAC1])
+ prueth_put_cores(prueth, ICSS_SLICE1);
+
+ if (prueth->eth_node[PRUETH_MAC0])
+ prueth_put_cores(prueth, ICSS_SLICE0);
+}
+
+static const struct prueth_pdata am654_sr1_icssg_pdata = {
+ .fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE,
+};
+
+static const struct of_device_id prueth_dt_match[] = {
+ { .compatible = "ti,am654-sr1-icssg-prueth", .data = &am654_sr1_icssg_pdata },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, prueth_dt_match);
+
+static struct platform_driver prueth_driver = {
+ .probe = prueth_probe,
+ .remove_new = prueth_remove,
+ .driver = {
+ .name = "icssg-prueth-sr1",
+ .of_match_table = prueth_dt_match,
+ .pm = &prueth_dev_pm_ops,
+ },
+};
+module_platform_driver(prueth_driver);
+
+MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
+MODULE_AUTHOR("Md Danish Anwar <danishanwar@ti.com>");
+MODULE_AUTHOR("Diogo Ivo <diogo.ivo@siemens.com>");
+MODULE_DESCRIPTION(PRUETH_MODULE_DESCRIPTION);
+MODULE_LICENSE("GPL");
projects / linux-platform-drivers-x86.git / commitdiff