--- /dev/null
+/*
+ * FUJITSU Extended Socket Network Device driver
+ * Copyright (c) 2015 FUJITSU LIMITED
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/nls.h>
+#include <linux/platform_device.h>
+#include <linux/netdevice.h>
+#include <linux/interrupt.h>
+
+#include "fjes.h"
+
+#define MAJ 1
+#define MIN 0
+#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)
+#define DRV_NAME "fjes"
+char fjes_driver_name[] = DRV_NAME;
+char fjes_driver_version[] = DRV_VERSION;
+static const char fjes_driver_string[] =
+ "FUJITSU Extended Socket Network Device Driver";
+static const char fjes_copyright[] =
+ "Copyright (c) 2015 FUJITSU LIMITED";
+
+MODULE_AUTHOR("Taku Izumi <izumi.taku@jp.fujitsu.com>");
+MODULE_DESCRIPTION("FUJITSU Extended Socket Network Device Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+
+static int fjes_request_irq(struct fjes_adapter *);
+static void fjes_free_irq(struct fjes_adapter *);
+
+static int fjes_open(struct net_device *);
+static int fjes_close(struct net_device *);
+static int fjes_setup_resources(struct fjes_adapter *);
+static void fjes_free_resources(struct fjes_adapter *);
+static netdev_tx_t fjes_xmit_frame(struct sk_buff *, struct net_device *);
+static void fjes_raise_intr_rxdata_task(struct work_struct *);
+static void fjes_tx_stall_task(struct work_struct *);
+static void fjes_force_close_task(struct work_struct *);
+static irqreturn_t fjes_intr(int, void*);
+static struct rtnl_link_stats64 *
+fjes_get_stats64(struct net_device *, struct rtnl_link_stats64 *);
+static int fjes_change_mtu(struct net_device *, int);
+static int fjes_vlan_rx_add_vid(struct net_device *, __be16 proto, u16);
+static int fjes_vlan_rx_kill_vid(struct net_device *, __be16 proto, u16);
+static void fjes_tx_retry(struct net_device *);
+
+static int fjes_acpi_add(struct acpi_device *);
+static int fjes_acpi_remove(struct acpi_device *);
+static acpi_status fjes_get_acpi_resource(struct acpi_resource *, void*);
+
+static int fjes_probe(struct platform_device *);
+static int fjes_remove(struct platform_device *);
+
+static int fjes_sw_init(struct fjes_adapter *);
+static void fjes_netdev_setup(struct net_device *);
+static void fjes_irq_watch_task(struct work_struct *);
+static void fjes_watch_unshare_task(struct work_struct *);
+static void fjes_rx_irq(struct fjes_adapter *, int);
+static int fjes_poll(struct napi_struct *, int);
+
+static const struct acpi_device_id fjes_acpi_ids[] = {
+ {"PNP0C02", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, fjes_acpi_ids);
+
+static struct acpi_driver fjes_acpi_driver = {
+ .name = DRV_NAME,
+ .class = DRV_NAME,
+ .owner = THIS_MODULE,
+ .ids = fjes_acpi_ids,
+ .ops = {
+ .add = fjes_acpi_add,
+ .remove = fjes_acpi_remove,
+ },
+};
+
+static struct platform_driver fjes_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = fjes_probe,
+ .remove = fjes_remove,
+};
+
+static struct resource fjes_resource[] = {
+ {
+ .flags = IORESOURCE_MEM,
+ .start = 0,
+ .end = 0,
+ },
+ {
+ .flags = IORESOURCE_IRQ,
+ .start = 0,
+ .end = 0,
+ },
+};
+
+static int fjes_acpi_add(struct acpi_device *device)
+{
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
+ char str_buf[sizeof(FJES_ACPI_SYMBOL) + 1];
+ struct platform_device *plat_dev;
+ union acpi_object *str;
+ acpi_status status;
+ int result;
+
+ status = acpi_evaluate_object(device->handle, "_STR", NULL, &buffer);
+ if (ACPI_FAILURE(status))
+ return -ENODEV;
+
+ str = buffer.pointer;
+ result = utf16s_to_utf8s((wchar_t *)str->string.pointer,
+ str->string.length, UTF16_LITTLE_ENDIAN,
+ str_buf, sizeof(str_buf) - 1);
+ str_buf[result] = 0;
+
+ if (strncmp(FJES_ACPI_SYMBOL, str_buf, strlen(FJES_ACPI_SYMBOL)) != 0) {
+ kfree(buffer.pointer);
+ return -ENODEV;
+ }
+ kfree(buffer.pointer);
+
+ status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
+ fjes_get_acpi_resource, fjes_resource);
+ if (ACPI_FAILURE(status))
+ return -ENODEV;
+
+ /* create platform_device */
+ plat_dev = platform_device_register_simple(DRV_NAME, 0, fjes_resource,
+ ARRAY_SIZE(fjes_resource));
+ device->driver_data = plat_dev;
+
+ return 0;
+}
+
+static int fjes_acpi_remove(struct acpi_device *device)
+{
+ struct platform_device *plat_dev;
+
+ plat_dev = (struct platform_device *)acpi_driver_data(device);
+ platform_device_unregister(plat_dev);
+
+ return 0;
+}
+
+static acpi_status
+fjes_get_acpi_resource(struct acpi_resource *acpi_res, void *data)
+{
+ struct acpi_resource_address32 *addr;
+ struct acpi_resource_irq *irq;
+ struct resource *res = data;
+
+ switch (acpi_res->type) {
+ case ACPI_RESOURCE_TYPE_ADDRESS32:
+ addr = &acpi_res->data.address32;
+ res[0].start = addr->address.minimum;
+ res[0].end = addr->address.minimum +
+ addr->address.address_length - 1;
+ break;
+
+ case ACPI_RESOURCE_TYPE_IRQ:
+ irq = &acpi_res->data.irq;
+ if (irq->interrupt_count != 1)
+ return AE_ERROR;
+ res[1].start = irq->interrupts[0];
+ res[1].end = irq->interrupts[0];
+ break;
+
+ default:
+ break;
+ }
+
+ return AE_OK;
+}
+
+static int fjes_request_irq(struct fjes_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ int result = -1;
+
+ adapter->interrupt_watch_enable = true;
+ if (!delayed_work_pending(&adapter->interrupt_watch_task)) {
+ queue_delayed_work(adapter->control_wq,
+ &adapter->interrupt_watch_task,
+ FJES_IRQ_WATCH_DELAY);
+ }
+
+ if (!adapter->irq_registered) {
+ result = request_irq(adapter->hw.hw_res.irq, fjes_intr,
+ IRQF_SHARED, netdev->name, adapter);
+ if (result)
+ adapter->irq_registered = false;
+ else
+ adapter->irq_registered = true;
+ }
+
+ return result;
+}
+
+static void fjes_free_irq(struct fjes_adapter *adapter)
+{
+ struct fjes_hw *hw = &adapter->hw;
+
+ adapter->interrupt_watch_enable = false;
+ cancel_delayed_work_sync(&adapter->interrupt_watch_task);
+
+ fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
+
+ if (adapter->irq_registered) {
+ free_irq(adapter->hw.hw_res.irq, adapter);
+ adapter->irq_registered = false;
+ }
+}
+
+static const struct net_device_ops fjes_netdev_ops = {
+ .ndo_open = fjes_open,
+ .ndo_stop = fjes_close,
+ .ndo_start_xmit = fjes_xmit_frame,
+ .ndo_get_stats64 = fjes_get_stats64,
+ .ndo_change_mtu = fjes_change_mtu,
+ .ndo_tx_timeout = fjes_tx_retry,
+ .ndo_vlan_rx_add_vid = fjes_vlan_rx_add_vid,
+ .ndo_vlan_rx_kill_vid = fjes_vlan_rx_kill_vid,
+};
+
+/* fjes_open - Called when a network interface is made active */
+static int fjes_open(struct net_device *netdev)
+{
+ struct fjes_adapter *adapter = netdev_priv(netdev);
+ struct fjes_hw *hw = &adapter->hw;
+ int result;
+
+ if (adapter->open_guard)
+ return -ENXIO;
+
+ result = fjes_setup_resources(adapter);
+ if (result)
+ goto err_setup_res;
+
+ hw->txrx_stop_req_bit = 0;
+ hw->epstop_req_bit = 0;
+
+ napi_enable(&adapter->napi);
+
+ fjes_hw_capture_interrupt_status(hw);
+
+ result = fjes_request_irq(adapter);
+ if (result)
+ goto err_req_irq;
+
+ fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, false);
+
+ netif_tx_start_all_queues(netdev);
+ netif_carrier_on(netdev);
+
+ return 0;
+
+err_req_irq:
+ fjes_free_irq(adapter);
+ napi_disable(&adapter->napi);
+
+err_setup_res:
+ fjes_free_resources(adapter);
+ return result;
+}
+
+/* fjes_close - Disables a network interface */
+static int fjes_close(struct net_device *netdev)
+{
+ struct fjes_adapter *adapter = netdev_priv(netdev);
+ struct fjes_hw *hw = &adapter->hw;
+ int epidx;
+
+ netif_tx_stop_all_queues(netdev);
+ netif_carrier_off(netdev);
+
+ fjes_hw_raise_epstop(hw);
+
+ napi_disable(&adapter->napi);
+
+ for (epidx = 0; epidx < hw->max_epid; epidx++) {
+ if (epidx == hw->my_epid)
+ continue;
+
+ adapter->hw.ep_shm_info[epidx].tx.info->v1i.rx_status &=
+ ~FJES_RX_POLL_WORK;
+ }
+
+ fjes_free_irq(adapter);
+
+ cancel_delayed_work_sync(&adapter->interrupt_watch_task);
+ cancel_work_sync(&adapter->unshare_watch_task);
+ adapter->unshare_watch_bitmask = 0;
+ cancel_work_sync(&adapter->raise_intr_rxdata_task);
+ cancel_work_sync(&adapter->tx_stall_task);
+
+ cancel_work_sync(&hw->update_zone_task);
+ cancel_work_sync(&hw->epstop_task);
+
+ fjes_hw_wait_epstop(hw);
+
+ fjes_free_resources(adapter);
+
+ return 0;
+}
+
+static int fjes_setup_resources(struct fjes_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct ep_share_mem_info *buf_pair;
+ struct fjes_hw *hw = &adapter->hw;
+ int result;
+ int epidx;
+
+ mutex_lock(&hw->hw_info.lock);
+ result = fjes_hw_request_info(hw);
+ switch (result) {
+ case 0:
+ for (epidx = 0; epidx < hw->max_epid; epidx++) {
+ hw->ep_shm_info[epidx].es_status =
+ hw->hw_info.res_buf->info.info[epidx].es_status;
+ hw->ep_shm_info[epidx].zone =
+ hw->hw_info.res_buf->info.info[epidx].zone;
+ }
+ break;
+ default:
+ case -ENOMSG:
+ case -EBUSY:
+ adapter->force_reset = true;
+
+ mutex_unlock(&hw->hw_info.lock);
+ return result;
+ }
+ mutex_unlock(&hw->hw_info.lock);
+
+ for (epidx = 0; epidx < (hw->max_epid); epidx++) {
+ if ((epidx != hw->my_epid) &&
+ (hw->ep_shm_info[epidx].es_status ==
+ FJES_ZONING_STATUS_ENABLE)) {
+ fjes_hw_raise_interrupt(hw, epidx,
+ REG_ICTL_MASK_INFO_UPDATE);
+ }
+ }
+
+ msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid);
+
+ for (epidx = 0; epidx < (hw->max_epid); epidx++) {
+ if (epidx == hw->my_epid)
+ continue;
+
+ buf_pair = &hw->ep_shm_info[epidx];
+
+ fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr,
+ netdev->mtu);
+
+ if (fjes_hw_epid_is_same_zone(hw, epidx)) {
+ mutex_lock(&hw->hw_info.lock);
+ result =
+ fjes_hw_register_buff_addr(hw, epidx, buf_pair);
+ mutex_unlock(&hw->hw_info.lock);
+
+ switch (result) {
+ case 0:
+ break;
+ case -ENOMSG:
+ case -EBUSY:
+ default:
+ adapter->force_reset = true;
+ return result;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static void fjes_free_resources(struct fjes_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct fjes_device_command_param param;
+ struct ep_share_mem_info *buf_pair;
+ struct fjes_hw *hw = &adapter->hw;
+ bool reset_flag = false;
+ int result;
+ int epidx;
+
+ for (epidx = 0; epidx < hw->max_epid; epidx++) {
+ if (epidx == hw->my_epid)
+ continue;
+
+ mutex_lock(&hw->hw_info.lock);
+ result = fjes_hw_unregister_buff_addr(hw, epidx);
+ mutex_unlock(&hw->hw_info.lock);
+
+ if (result)
+ reset_flag = true;
+
+ buf_pair = &hw->ep_shm_info[epidx];
+
+ fjes_hw_setup_epbuf(&buf_pair->tx,
+ netdev->dev_addr, netdev->mtu);
+
+ clear_bit(epidx, &hw->txrx_stop_req_bit);
+ }
+
+ if (reset_flag || adapter->force_reset) {
+ result = fjes_hw_reset(hw);
+
+ adapter->force_reset = false;
+
+ if (result)
+ adapter->open_guard = true;
+
+ hw->hw_info.buffer_share_bit = 0;
+
+ memset((void *)¶m, 0, sizeof(param));
+
+ param.req_len = hw->hw_info.req_buf_size;
+ param.req_start = __pa(hw->hw_info.req_buf);
+ param.res_len = hw->hw_info.res_buf_size;
+ param.res_start = __pa(hw->hw_info.res_buf);
+ param.share_start = __pa(hw->hw_info.share->ep_status);
+
+ fjes_hw_init_command_registers(hw, ¶m);
+ }
+}
+
+static void fjes_tx_stall_task(struct work_struct *work)
+{
+ struct fjes_adapter *adapter = container_of(work,
+ struct fjes_adapter, tx_stall_task);
+ struct net_device *netdev = adapter->netdev;
+ struct fjes_hw *hw = &adapter->hw;
+ int all_queue_available, sendable;
+ enum ep_partner_status pstatus;
+ int max_epid, my_epid, epid;
+ union ep_buffer_info *info;
+ int i;
+
+ if (((long)jiffies -
+ (long)(netdev->trans_start)) > FJES_TX_TX_STALL_TIMEOUT) {
+ netif_wake_queue(netdev);
+ return;
+ }
+
+ my_epid = hw->my_epid;
+ max_epid = hw->max_epid;
+
+ for (i = 0; i < 5; i++) {
+ all_queue_available = 1;
+
+ for (epid = 0; epid < max_epid; epid++) {
+ if (my_epid == epid)
+ continue;
+
+ pstatus = fjes_hw_get_partner_ep_status(hw, epid);
+ sendable = (pstatus == EP_PARTNER_SHARED);
+ if (!sendable)
+ continue;
+
+ info = adapter->hw.ep_shm_info[epid].tx.info;
+
+ if (EP_RING_FULL(info->v1i.head, info->v1i.tail,
+ info->v1i.count_max)) {
+ all_queue_available = 0;
+ break;
+ }
+ }
+
+ if (all_queue_available) {
+ netif_wake_queue(netdev);
+ return;
+ }
+ }
+
+ usleep_range(50, 100);
+
+ queue_work(adapter->txrx_wq, &adapter->tx_stall_task);
+}
+
+static void fjes_force_close_task(struct work_struct *work)
+{
+ struct fjes_adapter *adapter = container_of(work,
+ struct fjes_adapter, force_close_task);
+ struct net_device *netdev = adapter->netdev;
+
+ rtnl_lock();
+ dev_close(netdev);
+ rtnl_unlock();
+}
+
+static void fjes_raise_intr_rxdata_task(struct work_struct *work)
+{
+ struct fjes_adapter *adapter = container_of(work,
+ struct fjes_adapter, raise_intr_rxdata_task);
+ struct fjes_hw *hw = &adapter->hw;
+ enum ep_partner_status pstatus;
+ int max_epid, my_epid, epid;
+
+ my_epid = hw->my_epid;
+ max_epid = hw->max_epid;
+
+ for (epid = 0; epid < max_epid; epid++)
+ hw->ep_shm_info[epid].tx_status_work = 0;
+
+ for (epid = 0; epid < max_epid; epid++) {
+ if (epid == my_epid)
+ continue;
+
+ pstatus = fjes_hw_get_partner_ep_status(hw, epid);
+ if (pstatus == EP_PARTNER_SHARED) {
+ hw->ep_shm_info[epid].tx_status_work =
+ hw->ep_shm_info[epid].tx.info->v1i.tx_status;
+
+ if (hw->ep_shm_info[epid].tx_status_work ==
+ FJES_TX_DELAY_SEND_PENDING) {
+ hw->ep_shm_info[epid].tx.info->v1i.tx_status =
+ FJES_TX_DELAY_SEND_NONE;
+ }
+ }
+ }
+
+ for (epid = 0; epid < max_epid; epid++) {
+ if (epid == my_epid)
+ continue;
+
+ pstatus = fjes_hw_get_partner_ep_status(hw, epid);
+ if ((hw->ep_shm_info[epid].tx_status_work ==
+ FJES_TX_DELAY_SEND_PENDING) &&
+ (pstatus == EP_PARTNER_SHARED) &&
+ !(hw->ep_shm_info[epid].rx.info->v1i.rx_status)) {
+ fjes_hw_raise_interrupt(hw, epid,
+ REG_ICTL_MASK_RX_DATA);
+ }
+ }
+
+ usleep_range(500, 1000);
+}
+
+static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
+ void *data, size_t len)
+{
+ int retval;
+
+ retval = fjes_hw_epbuf_tx_pkt_send(&adapter->hw.ep_shm_info[dest].tx,
+ data, len);
+ if (retval)
+ return retval;
+
+ adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status =
+ FJES_TX_DELAY_SEND_PENDING;
+ if (!work_pending(&adapter->raise_intr_rxdata_task))
+ queue_work(adapter->txrx_wq,
+ &adapter->raise_intr_rxdata_task);
+
+ retval = 0;
+ return retval;
+}
+
+static netdev_tx_t
+fjes_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
+{
+ struct fjes_adapter *adapter = netdev_priv(netdev);
+ struct fjes_hw *hw = &adapter->hw;
+
+ int max_epid, my_epid, dest_epid;
+ enum ep_partner_status pstatus;
+ struct netdev_queue *cur_queue;
+ char shortpkt[VLAN_ETH_HLEN];
+ bool is_multi, vlan;
+ struct ethhdr *eth;
+ u16 queue_no = 0;
+ u16 vlan_id = 0;
+ netdev_tx_t ret;
+ char *data;
+ int len;
+
+ ret = NETDEV_TX_OK;
+ is_multi = false;
+ cur_queue = netdev_get_tx_queue(netdev, queue_no);
+
+ eth = (struct ethhdr *)skb->data;
+ my_epid = hw->my_epid;
+
+ vlan = (vlan_get_tag(skb, &vlan_id) == 0) ? true : false;
+
+ data = skb->data;
+ len = skb->len;
+
+ if (is_multicast_ether_addr(eth->h_dest)) {
+ dest_epid = 0;
+ max_epid = hw->max_epid;
+ is_multi = true;
+ } else if (is_local_ether_addr(eth->h_dest)) {
+ dest_epid = eth->h_dest[ETH_ALEN - 1];
+ max_epid = dest_epid + 1;
+
+ if ((eth->h_dest[0] == 0x02) &&
+ (0x00 == (eth->h_dest[1] | eth->h_dest[2] |
+ eth->h_dest[3] | eth->h_dest[4])) &&
+ (dest_epid < hw->max_epid)) {
+ ;
+ } else {
+ dest_epid = 0;
+ max_epid = 0;
+ ret = NETDEV_TX_OK;
+
+ adapter->stats64.tx_packets += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
+ adapter->stats64.tx_bytes += len;
+ hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
+ }
+ } else {
+ dest_epid = 0;
+ max_epid = 0;
+ ret = NETDEV_TX_OK;
+
+ adapter->stats64.tx_packets += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
+ adapter->stats64.tx_bytes += len;
+ hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
+ }
+
+ for (; dest_epid < max_epid; dest_epid++) {
+ if (my_epid == dest_epid)
+ continue;
+
+ pstatus = fjes_hw_get_partner_ep_status(hw, dest_epid);
+ if (pstatus != EP_PARTNER_SHARED) {
+ ret = NETDEV_TX_OK;
+ } else if (!fjes_hw_check_epbuf_version(
+ &adapter->hw.ep_shm_info[dest_epid].rx, 0)) {
+ /* version is NOT 0 */
+ adapter->stats64.tx_carrier_errors += 1;
+ hw->ep_shm_info[my_epid].net_stats
+ .tx_carrier_errors += 1;
+
+ ret = NETDEV_TX_OK;
+ } else if (!fjes_hw_check_mtu(
+ &adapter->hw.ep_shm_info[dest_epid].rx,
+ netdev->mtu)) {
+ adapter->stats64.tx_dropped += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_dropped += 1;
+ adapter->stats64.tx_errors += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_errors += 1;
+
+ ret = NETDEV_TX_OK;
+ } else if (vlan &&
+ !fjes_hw_check_vlan_id(
+ &adapter->hw.ep_shm_info[dest_epid].rx,
+ vlan_id)) {
+ ret = NETDEV_TX_OK;
+ } else {
+ if (len < VLAN_ETH_HLEN) {
+ memset(shortpkt, 0, VLAN_ETH_HLEN);
+ memcpy(shortpkt, skb->data, skb->len);
+ len = VLAN_ETH_HLEN;
+ data = shortpkt;
+ }
+
+ if (adapter->tx_retry_count == 0) {
+ adapter->tx_start_jiffies = jiffies;
+ adapter->tx_retry_count = 1;
+ } else {
+ adapter->tx_retry_count++;
+ }
+
+ if (fjes_tx_send(adapter, dest_epid, data, len)) {
+ if (is_multi) {
+ ret = NETDEV_TX_OK;
+ } else if (
+ ((long)jiffies -
+ (long)adapter->tx_start_jiffies) >=
+ FJES_TX_RETRY_TIMEOUT) {
+ adapter->stats64.tx_fifo_errors += 1;
+ hw->ep_shm_info[my_epid].net_stats
+ .tx_fifo_errors += 1;
+ adapter->stats64.tx_errors += 1;
+ hw->ep_shm_info[my_epid].net_stats
+ .tx_errors += 1;
+
+ ret = NETDEV_TX_OK;
+ } else {
+ netdev->trans_start = jiffies;
+ netif_tx_stop_queue(cur_queue);
+
+ if (!work_pending(&adapter->tx_stall_task))
+ queue_work(adapter->txrx_wq,
+ &adapter->tx_stall_task);
+
+ ret = NETDEV_TX_BUSY;
+ }
+ } else {
+ if (!is_multi) {
+ adapter->stats64.tx_packets += 1;
+ hw->ep_shm_info[my_epid].net_stats
+ .tx_packets += 1;
+ adapter->stats64.tx_bytes += len;
+ hw->ep_shm_info[my_epid].net_stats
+ .tx_bytes += len;
+ }
+
+ adapter->tx_retry_count = 0;
+ ret = NETDEV_TX_OK;
+ }
+ }
+ }
+
+ if (ret == NETDEV_TX_OK) {
+ dev_kfree_skb(skb);
+ if (is_multi) {
+ adapter->stats64.tx_packets += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
+ adapter->stats64.tx_bytes += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
+ }
+ }
+
+ return ret;
+}
+
+static void fjes_tx_retry(struct net_device *netdev)
+{
+ struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0);
+
+ netif_tx_wake_queue(queue);
+}
+
+static struct rtnl_link_stats64 *
+fjes_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
+{
+ struct fjes_adapter *adapter = netdev_priv(netdev);
+
+ memcpy(stats, &adapter->stats64, sizeof(struct rtnl_link_stats64));
+
+ return stats;
+}
+
+static int fjes_change_mtu(struct net_device *netdev, int new_mtu)
+{
+ bool running = netif_running(netdev);
+ int ret = 0;
+ int idx;
+
+ for (idx = 0; fjes_support_mtu[idx] != 0; idx++) {
+ if (new_mtu <= fjes_support_mtu[idx]) {
+ new_mtu = fjes_support_mtu[idx];
+ if (new_mtu == netdev->mtu)
+ return 0;
+
+ if (running)
+ fjes_close(netdev);
+
+ netdev->mtu = new_mtu;
+
+ if (running)
+ ret = fjes_open(netdev);
+
+ return ret;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int fjes_vlan_rx_add_vid(struct net_device *netdev,
+ __be16 proto, u16 vid)
+{
+ struct fjes_adapter *adapter = netdev_priv(netdev);
+ bool ret = true;
+ int epid;
+
+ for (epid = 0; epid < adapter->hw.max_epid; epid++) {
+ if (epid == adapter->hw.my_epid)
+ continue;
+
+ if (!fjes_hw_check_vlan_id(
+ &adapter->hw.ep_shm_info[epid].tx, vid))
+ ret = fjes_hw_set_vlan_id(
+ &adapter->hw.ep_shm_info[epid].tx, vid);
+ }
+
+ return ret ? 0 : -ENOSPC;
+}
+
+static int fjes_vlan_rx_kill_vid(struct net_device *netdev,
+ __be16 proto, u16 vid)
+{
+ struct fjes_adapter *adapter = netdev_priv(netdev);
+ int epid;
+
+ for (epid = 0; epid < adapter->hw.max_epid; epid++) {
+ if (epid == adapter->hw.my_epid)
+ continue;
+
+ fjes_hw_del_vlan_id(&adapter->hw.ep_shm_info[epid].tx, vid);
+ }
+
+ return 0;
+}
+
+static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter,
+ int src_epid)
+{
+ struct fjes_hw *hw = &adapter->hw;
+ enum ep_partner_status status;
+
+ status = fjes_hw_get_partner_ep_status(hw, src_epid);
+ switch (status) {
+ case EP_PARTNER_UNSHARE:
+ case EP_PARTNER_COMPLETE:
+ default:
+ break;
+ case EP_PARTNER_WAITING:
+ if (src_epid < hw->my_epid) {
+ hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
+ FJES_RX_STOP_REQ_DONE;
+
+ clear_bit(src_epid, &hw->txrx_stop_req_bit);
+ set_bit(src_epid, &adapter->unshare_watch_bitmask);
+
+ if (!work_pending(&adapter->unshare_watch_task))
+ queue_work(adapter->control_wq,
+ &adapter->unshare_watch_task);
+ }
+ break;
+ case EP_PARTNER_SHARED:
+ if (hw->ep_shm_info[src_epid].rx.info->v1i.rx_status &
+ FJES_RX_STOP_REQ_REQUEST) {
+ set_bit(src_epid, &hw->epstop_req_bit);
+ if (!work_pending(&hw->epstop_task))
+ queue_work(adapter->control_wq,
+ &hw->epstop_task);
+ }
+ break;
+ }
+}
+
+static void fjes_stop_req_irq(struct fjes_adapter *adapter, int src_epid)
+{
+ struct fjes_hw *hw = &adapter->hw;
+ enum ep_partner_status status;
+
+ set_bit(src_epid, &hw->hw_info.buffer_unshare_reserve_bit);
+
+ status = fjes_hw_get_partner_ep_status(hw, src_epid);
+ switch (status) {
+ case EP_PARTNER_WAITING:
+ hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
+ FJES_RX_STOP_REQ_DONE;
+ clear_bit(src_epid, &hw->txrx_stop_req_bit);
+ /* fall through */
+ case EP_PARTNER_UNSHARE:
+ case EP_PARTNER_COMPLETE:
+ default:
+ set_bit(src_epid, &adapter->unshare_watch_bitmask);
+ if (!work_pending(&adapter->unshare_watch_task))
+ queue_work(adapter->control_wq,
+ &adapter->unshare_watch_task);
+ break;
+ case EP_PARTNER_SHARED:
+ set_bit(src_epid, &hw->epstop_req_bit);
+
+ if (!work_pending(&hw->epstop_task))
+ queue_work(adapter->control_wq, &hw->epstop_task);
+ break;
+ }
+}
+
+static void fjes_update_zone_irq(struct fjes_adapter *adapter,
+ int src_epid)
+{
+ struct fjes_hw *hw = &adapter->hw;
+
+ if (!work_pending(&hw->update_zone_task))
+ queue_work(adapter->control_wq, &hw->update_zone_task);
+}
+
+static irqreturn_t fjes_intr(int irq, void *data)
+{
+ struct fjes_adapter *adapter = data;
+ struct fjes_hw *hw = &adapter->hw;
+ irqreturn_t ret;
+ u32 icr;
+
+ icr = fjes_hw_capture_interrupt_status(hw);
+
+ if (icr & REG_IS_MASK_IS_ASSERT) {
+ if (icr & REG_ICTL_MASK_RX_DATA)
+ fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID);
+
+ if (icr & REG_ICTL_MASK_DEV_STOP_REQ)
+ fjes_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
+
+ if (icr & REG_ICTL_MASK_TXRX_STOP_REQ)
+ fjes_txrx_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
+
+ if (icr & REG_ICTL_MASK_TXRX_STOP_DONE)
+ fjes_hw_set_irqmask(hw,
+ REG_ICTL_MASK_TXRX_STOP_DONE, true);
+
+ if (icr & REG_ICTL_MASK_INFO_UPDATE)
+ fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID);
+
+ ret = IRQ_HANDLED;
+ } else {
+ ret = IRQ_NONE;
+ }
+
+ return ret;
+}
+
+static int fjes_rxframe_search_exist(struct fjes_adapter *adapter,
+ int start_epid)
+{
+ struct fjes_hw *hw = &adapter->hw;
+ enum ep_partner_status pstatus;
+ int max_epid, cur_epid;
+ int i;
+
+ max_epid = hw->max_epid;
+ start_epid = (start_epid + 1 + max_epid) % max_epid;
+
+ for (i = 0; i < max_epid; i++) {
+ cur_epid = (start_epid + i) % max_epid;
+ if (cur_epid == hw->my_epid)
+ continue;
+
+ pstatus = fjes_hw_get_partner_ep_status(hw, cur_epid);
+ if (pstatus == EP_PARTNER_SHARED) {
+ if (!fjes_hw_epbuf_rx_is_empty(
+ &hw->ep_shm_info[cur_epid].rx))
+ return cur_epid;
+ }
+ }
+ return -1;
+}
+
+static void *fjes_rxframe_get(struct fjes_adapter *adapter, size_t *psize,
+ int *cur_epid)
+{
+ void *frame;
+
+ *cur_epid = fjes_rxframe_search_exist(adapter, *cur_epid);
+ if (*cur_epid < 0)
+ return NULL;
+
+ frame =
+ fjes_hw_epbuf_rx_curpkt_get_addr(
+ &adapter->hw.ep_shm_info[*cur_epid].rx, psize);
+
+ return frame;
+}
+
+static void fjes_rxframe_release(struct fjes_adapter *adapter, int cur_epid)
+{
+ fjes_hw_epbuf_rx_curpkt_drop(&adapter->hw.ep_shm_info[cur_epid].rx);
+}
+
+static void fjes_rx_irq(struct fjes_adapter *adapter, int src_epid)
+{
+ struct fjes_hw *hw = &adapter->hw;
+
+ fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, true);
+
+ adapter->unset_rx_last = true;
+ napi_schedule(&adapter->napi);
+}
+
+static int fjes_poll(struct napi_struct *napi, int budget)
+{
+ struct fjes_adapter *adapter =
+ container_of(napi, struct fjes_adapter, napi);
+ struct net_device *netdev = napi->dev;
+ struct fjes_hw *hw = &adapter->hw;
+ struct sk_buff *skb;
+ int work_done = 0;
+ int cur_epid = 0;
+ int epidx;
+ size_t frame_len;
+ void *frame;
+
+ for (epidx = 0; epidx < hw->max_epid; epidx++) {
+ if (epidx == hw->my_epid)
+ continue;
+
+ adapter->hw.ep_shm_info[epidx].tx.info->v1i.rx_status |=
+ FJES_RX_POLL_WORK;
+ }
+
+ while (work_done < budget) {
+ prefetch(&adapter->hw);
+ frame = fjes_rxframe_get(adapter, &frame_len, &cur_epid);
+
+ if (frame) {
+ skb = napi_alloc_skb(napi, frame_len);
+ if (!skb) {
+ adapter->stats64.rx_dropped += 1;
+ hw->ep_shm_info[cur_epid].net_stats
+ .rx_dropped += 1;
+ adapter->stats64.rx_errors += 1;
+ hw->ep_shm_info[cur_epid].net_stats
+ .rx_errors += 1;
+ } else {
+ memcpy(skb_put(skb, frame_len),
+ frame, frame_len);
+ skb->protocol = eth_type_trans(skb, netdev);
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+ netif_receive_skb(skb);
+
+ work_done++;
+
+ adapter->stats64.rx_packets += 1;
+ hw->ep_shm_info[cur_epid].net_stats
+ .rx_packets += 1;
+ adapter->stats64.rx_bytes += frame_len;
+ hw->ep_shm_info[cur_epid].net_stats
+ .rx_bytes += frame_len;
+
+ if (is_multicast_ether_addr(
+ ((struct ethhdr *)frame)->h_dest)) {
+ adapter->stats64.multicast += 1;
+ hw->ep_shm_info[cur_epid].net_stats
+ .multicast += 1;
+ }
+ }
+
+ fjes_rxframe_release(adapter, cur_epid);
+ adapter->unset_rx_last = true;
+ } else {
+ break;
+ }
+ }
+
+ if (work_done < budget) {
+ napi_complete(napi);
+
+ if (adapter->unset_rx_last) {
+ adapter->rx_last_jiffies = jiffies;
+ adapter->unset_rx_last = false;
+ }
+
+ if (((long)jiffies - (long)adapter->rx_last_jiffies) < 3) {
+ napi_reschedule(napi);
+ } else {
+ for (epidx = 0; epidx < hw->max_epid; epidx++) {
+ if (epidx == hw->my_epid)
+ continue;
+ adapter->hw.ep_shm_info[epidx]
+ .tx.info->v1i.rx_status &=
+ ~FJES_RX_POLL_WORK;
+ }
+
+ fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, false);
+ }
+ }
+
+ return work_done;
+}
+
+/* fjes_probe - Device Initialization Routine */
+static int fjes_probe(struct platform_device *plat_dev)
+{
+ struct fjes_adapter *adapter;
+ struct net_device *netdev;
+ struct resource *res;
+ struct fjes_hw *hw;
+ int err;
+
+ err = -ENOMEM;
+ netdev = alloc_netdev_mq(sizeof(struct fjes_adapter), "es%d",
+ NET_NAME_UNKNOWN, fjes_netdev_setup,
+ FJES_MAX_QUEUES);
+
+ if (!netdev)
+ goto err_out;
+
+ SET_NETDEV_DEV(netdev, &plat_dev->dev);
+
+ dev_set_drvdata(&plat_dev->dev, netdev);
+ adapter = netdev_priv(netdev);
+ adapter->netdev = netdev;
+ adapter->plat_dev = plat_dev;
+ hw = &adapter->hw;
+ hw->back = adapter;
+
+ /* setup the private structure */
+ err = fjes_sw_init(adapter);
+ if (err)
+ goto err_free_netdev;
+
+ INIT_WORK(&adapter->force_close_task, fjes_force_close_task);
+ adapter->force_reset = false;
+ adapter->open_guard = false;
+
+ adapter->txrx_wq = create_workqueue(DRV_NAME "/txrx");
+ adapter->control_wq = create_workqueue(DRV_NAME "/control");
+
+ INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
+ INIT_WORK(&adapter->raise_intr_rxdata_task,
+ fjes_raise_intr_rxdata_task);
+ INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task);
+ adapter->unshare_watch_bitmask = 0;
+
+ INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task);
+ adapter->interrupt_watch_enable = false;
+
+ res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
+ hw->hw_res.start = res->start;
+ hw->hw_res.size = res->end - res->start + 1;
+ hw->hw_res.irq = platform_get_irq(plat_dev, 0);
+ err = fjes_hw_init(&adapter->hw);
+ if (err)
+ goto err_free_netdev;
+
+ /* setup MAC address (02:00:00:00:00:[epid])*/
+ netdev->dev_addr[0] = 2;
+ netdev->dev_addr[1] = 0;
+ netdev->dev_addr[2] = 0;
+ netdev->dev_addr[3] = 0;
+ netdev->dev_addr[4] = 0;
+ netdev->dev_addr[5] = hw->my_epid; /* EPID */
+
+ err = register_netdev(netdev);
+ if (err)
+ goto err_hw_exit;
+
+ netif_carrier_off(netdev);
+
+ return 0;
+
+err_hw_exit:
+ fjes_hw_exit(&adapter->hw);
+err_free_netdev:
+ free_netdev(netdev);
+err_out:
+ return err;
+}
+
+/* fjes_remove - Device Removal Routine */
+static int fjes_remove(struct platform_device *plat_dev)
+{
+ struct net_device *netdev = dev_get_drvdata(&plat_dev->dev);
+ struct fjes_adapter *adapter = netdev_priv(netdev);
+ struct fjes_hw *hw = &adapter->hw;
+
+ cancel_delayed_work_sync(&adapter->interrupt_watch_task);
+ cancel_work_sync(&adapter->unshare_watch_task);
+ cancel_work_sync(&adapter->raise_intr_rxdata_task);
+ cancel_work_sync(&adapter->tx_stall_task);
+ if (adapter->control_wq)
+ destroy_workqueue(adapter->control_wq);
+ if (adapter->txrx_wq)
+ destroy_workqueue(adapter->txrx_wq);
+
+ unregister_netdev(netdev);
+
+ fjes_hw_exit(hw);
+
+ netif_napi_del(&adapter->napi);
+
+ free_netdev(netdev);
+
+ return 0;
+}
+
+static int fjes_sw_init(struct fjes_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+
+ netif_napi_add(netdev, &adapter->napi, fjes_poll, 64);
+
+ return 0;
+}
+
+/* fjes_netdev_setup - netdevice initialization routine */
+static void fjes_netdev_setup(struct net_device *netdev)
+{
+ ether_setup(netdev);
+
+ netdev->watchdog_timeo = FJES_TX_RETRY_INTERVAL;
+ netdev->netdev_ops = &fjes_netdev_ops;
+ fjes_set_ethtool_ops(netdev);
+ netdev->mtu = fjes_support_mtu[0];
+ netdev->flags |= IFF_BROADCAST;
+ netdev->features |= NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_FILTER;
+}
+
+static void fjes_irq_watch_task(struct work_struct *work)
+{
+ struct fjes_adapter *adapter = container_of(to_delayed_work(work),
+ struct fjes_adapter, interrupt_watch_task);
+
+ local_irq_disable();
+ fjes_intr(adapter->hw.hw_res.irq, adapter);
+ local_irq_enable();
+
+ if (fjes_rxframe_search_exist(adapter, 0) >= 0)
+ napi_schedule(&adapter->napi);
+
+ if (adapter->interrupt_watch_enable) {
+ if (!delayed_work_pending(&adapter->interrupt_watch_task))
+ queue_delayed_work(adapter->control_wq,
+ &adapter->interrupt_watch_task,
+ FJES_IRQ_WATCH_DELAY);
+ }
+}
+
+static void fjes_watch_unshare_task(struct work_struct *work)
+{
+ struct fjes_adapter *adapter =
+ container_of(work, struct fjes_adapter, unshare_watch_task);
+
+ struct net_device *netdev = adapter->netdev;
+ struct fjes_hw *hw = &adapter->hw;
+
+ int unshare_watch, unshare_reserve;
+ int max_epid, my_epid, epidx;
+ int stop_req, stop_req_done;
+ ulong unshare_watch_bitmask;
+ int wait_time = 0;
+ int is_shared;
+ int ret;
+
+ my_epid = hw->my_epid;
+ max_epid = hw->max_epid;
+
+ unshare_watch_bitmask = adapter->unshare_watch_bitmask;
+ adapter->unshare_watch_bitmask = 0;
+
+ while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) &&
+ (wait_time < 3000)) {
+ for (epidx = 0; epidx < hw->max_epid; epidx++) {
+ if (epidx == hw->my_epid)
+ continue;
+
+ is_shared = fjes_hw_epid_is_shared(hw->hw_info.share,
+ epidx);
+
+ stop_req = test_bit(epidx, &hw->txrx_stop_req_bit);
+
+ stop_req_done = hw->ep_shm_info[epidx].rx.info->v1i.rx_status &
+ FJES_RX_STOP_REQ_DONE;
+
+ unshare_watch = test_bit(epidx, &unshare_watch_bitmask);
+
+ unshare_reserve = test_bit(epidx,
+ &hw->hw_info.buffer_unshare_reserve_bit);
+
+ if ((!stop_req ||
+ (is_shared && (!is_shared || !stop_req_done))) &&
+ (is_shared || !unshare_watch || !unshare_reserve))
+ continue;
+
+ mutex_lock(&hw->hw_info.lock);
+ ret = fjes_hw_unregister_buff_addr(hw, epidx);
+ switch (ret) {
+ case 0:
+ break;
+ case -ENOMSG:
+ case -EBUSY:
+ default:
+ if (!work_pending(
+ &adapter->force_close_task)) {
+ adapter->force_reset = true;
+ schedule_work(
+ &adapter->force_close_task);
+ }
+ break;
+ }
+ mutex_unlock(&hw->hw_info.lock);
+
+ fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
+ netdev->dev_addr, netdev->mtu);
+
+ clear_bit(epidx, &hw->txrx_stop_req_bit);
+ clear_bit(epidx, &unshare_watch_bitmask);
+ clear_bit(epidx,
+ &hw->hw_info.buffer_unshare_reserve_bit);
+ }
+
+ msleep(100);
+ wait_time += 100;
+ }
+
+ if (hw->hw_info.buffer_unshare_reserve_bit) {
+ for (epidx = 0; epidx < hw->max_epid; epidx++) {
+ if (epidx == hw->my_epid)
+ continue;
+
+ if (test_bit(epidx,
+ &hw->hw_info.buffer_unshare_reserve_bit)) {
+ mutex_lock(&hw->hw_info.lock);
+
+ ret = fjes_hw_unregister_buff_addr(hw, epidx);
+ switch (ret) {
+ case 0:
+ break;
+ case -ENOMSG:
+ case -EBUSY:
+ default:
+ if (!work_pending(
+ &adapter->force_close_task)) {
+ adapter->force_reset = true;
+ schedule_work(
+ &adapter->force_close_task);
+ }
+ break;
+ }
+ mutex_unlock(&hw->hw_info.lock);
+
+ fjes_hw_setup_epbuf(
+ &hw->ep_shm_info[epidx].tx,
+ netdev->dev_addr, netdev->mtu);
+
+ clear_bit(epidx, &hw->txrx_stop_req_bit);
+ clear_bit(epidx, &unshare_watch_bitmask);
+ clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
+ }
+
+ if (test_bit(epidx, &unshare_watch_bitmask)) {
+ hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
+ ~FJES_RX_STOP_REQ_DONE;
+ }
+ }
+ }
+}
+
+/* fjes_init_module - Driver Registration Routine */
+static int __init fjes_init_module(void)
+{
+ int result;
+
+ pr_info("%s - version %s - %s\n",
+ fjes_driver_string, fjes_driver_version, fjes_copyright);
+
+ result = platform_driver_register(&fjes_driver);
+ if (result < 0)
+ return result;
+
+ result = acpi_bus_register_driver(&fjes_acpi_driver);
+ if (result < 0)
+ goto fail_acpi_driver;
+
+ return 0;
+
+fail_acpi_driver:
+ platform_driver_unregister(&fjes_driver);
+ return result;
+}
+
+module_init(fjes_init_module);
+
+/* fjes_exit_module - Driver Exit Cleanup Routine */
+static void __exit fjes_exit_module(void)
+{
+ acpi_bus_unregister_driver(&fjes_acpi_driver);
+ platform_driver_unregister(&fjes_driver);
+}
+
+module_exit(fjes_exit_module);
Code Review / kvmfornfv.git / blobdiff