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-rw-r--r--drivers/net/fjes/Makefile30
-rw-r--r--drivers/net/fjes/fjes.h77
-rw-r--r--drivers/net/fjes/fjes_ethtool.c137
-rw-r--r--drivers/net/fjes/fjes_hw.c1125
-rw-r--r--drivers/net/fjes/fjes_hw.h334
-rw-r--r--drivers/net/fjes/fjes_main.c1383
-rw-r--r--drivers/net/fjes/fjes_regs.h142
7 files changed, 3228 insertions, 0 deletions
diff --git a/drivers/net/fjes/Makefile b/drivers/net/fjes/Makefile
new file mode 100644
index 000000000000..523e3d7cf7aa
--- /dev/null
+++ b/drivers/net/fjes/Makefile
@@ -0,0 +1,30 @@
+################################################################################
+#
+# 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".
+#
+################################################################################
+
+
+#
+# Makefile for the FUJITSU Extended Socket network device driver
+#
+
+obj-$(CONFIG_FUJITSU_ES) += fjes.o
+
+fjes-objs := fjes_main.o fjes_hw.o fjes_ethtool.o
diff --git a/drivers/net/fjes/fjes.h b/drivers/net/fjes/fjes.h
new file mode 100644
index 000000000000..a592fe21c698
--- /dev/null
+++ b/drivers/net/fjes/fjes.h
@@ -0,0 +1,77 @@
+/*
+ * 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".
+ *
+ */
+
+#ifndef FJES_H_
+#define FJES_H_
+
+#include <linux/acpi.h>
+
+#include "fjes_hw.h"
+
+#define FJES_ACPI_SYMBOL "Extended Socket"
+#define FJES_MAX_QUEUES 1
+#define FJES_TX_RETRY_INTERVAL (20 * HZ)
+#define FJES_TX_RETRY_TIMEOUT (100)
+#define FJES_TX_TX_STALL_TIMEOUT (FJES_TX_RETRY_INTERVAL / 2)
+#define FJES_OPEN_ZONE_UPDATE_WAIT (300) /* msec */
+#define FJES_IRQ_WATCH_DELAY (HZ)
+
+/* board specific private data structure */
+struct fjes_adapter {
+ struct net_device *netdev;
+ struct platform_device *plat_dev;
+
+ struct napi_struct napi;
+ struct rtnl_link_stats64 stats64;
+
+ unsigned int tx_retry_count;
+ unsigned long tx_start_jiffies;
+ unsigned long rx_last_jiffies;
+ bool unset_rx_last;
+
+ struct work_struct force_close_task;
+ bool force_reset;
+ bool open_guard;
+
+ bool irq_registered;
+
+ struct workqueue_struct *txrx_wq;
+ struct workqueue_struct *control_wq;
+
+ struct work_struct tx_stall_task;
+ struct work_struct raise_intr_rxdata_task;
+
+ struct work_struct unshare_watch_task;
+ unsigned long unshare_watch_bitmask;
+
+ struct delayed_work interrupt_watch_task;
+ bool interrupt_watch_enable;
+
+ struct fjes_hw hw;
+};
+
+extern char fjes_driver_name[];
+extern char fjes_driver_version[];
+extern const u32 fjes_support_mtu[];
+
+void fjes_set_ethtool_ops(struct net_device *);
+
+#endif /* FJES_H_ */
diff --git a/drivers/net/fjes/fjes_ethtool.c b/drivers/net/fjes/fjes_ethtool.c
new file mode 100644
index 000000000000..0119dd199276
--- /dev/null
+++ b/drivers/net/fjes/fjes_ethtool.c
@@ -0,0 +1,137 @@
+/*
+ * 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".
+ *
+ */
+
+/* ethtool support for fjes */
+
+#include <linux/vmalloc.h>
+#include <linux/netdevice.h>
+#include <linux/ethtool.h>
+#include <linux/platform_device.h>
+
+#include "fjes.h"
+
+struct fjes_stats {
+ char stat_string[ETH_GSTRING_LEN];
+ int sizeof_stat;
+ int stat_offset;
+};
+
+#define FJES_STAT(name, stat) { \
+ .stat_string = name, \
+ .sizeof_stat = FIELD_SIZEOF(struct fjes_adapter, stat), \
+ .stat_offset = offsetof(struct fjes_adapter, stat) \
+}
+
+static const struct fjes_stats fjes_gstrings_stats[] = {
+ FJES_STAT("rx_packets", stats64.rx_packets),
+ FJES_STAT("tx_packets", stats64.tx_packets),
+ FJES_STAT("rx_bytes", stats64.rx_bytes),
+ FJES_STAT("tx_bytes", stats64.rx_bytes),
+ FJES_STAT("rx_dropped", stats64.rx_dropped),
+ FJES_STAT("tx_dropped", stats64.tx_dropped),
+};
+
+static void fjes_get_ethtool_stats(struct net_device *netdev,
+ struct ethtool_stats *stats, u64 *data)
+{
+ struct fjes_adapter *adapter = netdev_priv(netdev);
+ char *p;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(fjes_gstrings_stats); i++) {
+ p = (char *)adapter + fjes_gstrings_stats[i].stat_offset;
+ data[i] = (fjes_gstrings_stats[i].sizeof_stat == sizeof(u64))
+ ? *(u64 *)p : *(u32 *)p;
+ }
+}
+
+static void fjes_get_strings(struct net_device *netdev,
+ u32 stringset, u8 *data)
+{
+ u8 *p = data;
+ int i;
+
+ switch (stringset) {
+ case ETH_SS_STATS:
+ for (i = 0; i < ARRAY_SIZE(fjes_gstrings_stats); i++) {
+ memcpy(p, fjes_gstrings_stats[i].stat_string,
+ ETH_GSTRING_LEN);
+ p += ETH_GSTRING_LEN;
+ }
+ break;
+ }
+}
+
+static int fjes_get_sset_count(struct net_device *netdev, int sset)
+{
+ switch (sset) {
+ case ETH_SS_STATS:
+ return ARRAY_SIZE(fjes_gstrings_stats);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static void fjes_get_drvinfo(struct net_device *netdev,
+ struct ethtool_drvinfo *drvinfo)
+{
+ struct fjes_adapter *adapter = netdev_priv(netdev);
+ struct platform_device *plat_dev;
+
+ plat_dev = adapter->plat_dev;
+
+ strlcpy(drvinfo->driver, fjes_driver_name, sizeof(drvinfo->driver));
+ strlcpy(drvinfo->version, fjes_driver_version,
+ sizeof(drvinfo->version));
+
+ strlcpy(drvinfo->fw_version, "none", sizeof(drvinfo->fw_version));
+ snprintf(drvinfo->bus_info, sizeof(drvinfo->bus_info),
+ "platform:%s", plat_dev->name);
+ drvinfo->regdump_len = 0;
+ drvinfo->eedump_len = 0;
+}
+
+static int fjes_get_settings(struct net_device *netdev,
+ struct ethtool_cmd *ecmd)
+{
+ ecmd->supported = 0;
+ ecmd->advertising = 0;
+ ecmd->duplex = DUPLEX_FULL;
+ ecmd->autoneg = AUTONEG_DISABLE;
+ ecmd->transceiver = XCVR_DUMMY1;
+ ecmd->port = PORT_NONE;
+ ethtool_cmd_speed_set(ecmd, 20000); /* 20Gb/s */
+
+ return 0;
+}
+
+static const struct ethtool_ops fjes_ethtool_ops = {
+ .get_settings = fjes_get_settings,
+ .get_drvinfo = fjes_get_drvinfo,
+ .get_ethtool_stats = fjes_get_ethtool_stats,
+ .get_strings = fjes_get_strings,
+ .get_sset_count = fjes_get_sset_count,
+};
+
+void fjes_set_ethtool_ops(struct net_device *netdev)
+{
+ netdev->ethtool_ops = &fjes_ethtool_ops;
+}
diff --git a/drivers/net/fjes/fjes_hw.c b/drivers/net/fjes/fjes_hw.c
new file mode 100644
index 000000000000..b5f4a78da828
--- /dev/null
+++ b/drivers/net/fjes/fjes_hw.c
@@ -0,0 +1,1125 @@
+/*
+ * 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 "fjes_hw.h"
+#include "fjes.h"
+
+static void fjes_hw_update_zone_task(struct work_struct *);
+static void fjes_hw_epstop_task(struct work_struct *);
+
+/* supported MTU list */
+const u32 fjes_support_mtu[] = {
+ FJES_MTU_DEFINE(8 * 1024),
+ FJES_MTU_DEFINE(16 * 1024),
+ FJES_MTU_DEFINE(32 * 1024),
+ FJES_MTU_DEFINE(64 * 1024),
+ 0
+};
+
+u32 fjes_hw_rd32(struct fjes_hw *hw, u32 reg)
+{
+ u8 *base = hw->base;
+ u32 value = 0;
+
+ value = readl(&base[reg]);
+
+ return value;
+}
+
+static u8 *fjes_hw_iomap(struct fjes_hw *hw)
+{
+ u8 *base;
+
+ if (!request_mem_region(hw->hw_res.start, hw->hw_res.size,
+ fjes_driver_name)) {
+ pr_err("request_mem_region failed\n");
+ return NULL;
+ }
+
+ base = (u8 *)ioremap_nocache(hw->hw_res.start, hw->hw_res.size);
+
+ return base;
+}
+
+static void fjes_hw_iounmap(struct fjes_hw *hw)
+{
+ iounmap(hw->base);
+ release_mem_region(hw->hw_res.start, hw->hw_res.size);
+}
+
+int fjes_hw_reset(struct fjes_hw *hw)
+{
+ union REG_DCTL dctl;
+ int timeout;
+
+ dctl.reg = 0;
+ dctl.bits.reset = 1;
+ wr32(XSCT_DCTL, dctl.reg);
+
+ timeout = FJES_DEVICE_RESET_TIMEOUT * 1000;
+ dctl.reg = rd32(XSCT_DCTL);
+ while ((dctl.bits.reset == 1) && (timeout > 0)) {
+ msleep(1000);
+ dctl.reg = rd32(XSCT_DCTL);
+ timeout -= 1000;
+ }
+
+ return timeout > 0 ? 0 : -EIO;
+}
+
+static int fjes_hw_get_max_epid(struct fjes_hw *hw)
+{
+ union REG_MAX_EP info;
+
+ info.reg = rd32(XSCT_MAX_EP);
+
+ return info.bits.maxep;
+}
+
+static int fjes_hw_get_my_epid(struct fjes_hw *hw)
+{
+ union REG_OWNER_EPID info;
+
+ info.reg = rd32(XSCT_OWNER_EPID);
+
+ return info.bits.epid;
+}
+
+static int fjes_hw_alloc_shared_status_region(struct fjes_hw *hw)
+{
+ size_t size;
+
+ size = sizeof(struct fjes_device_shared_info) +
+ (sizeof(u8) * hw->max_epid);
+ hw->hw_info.share = kzalloc(size, GFP_KERNEL);
+ if (!hw->hw_info.share)
+ return -ENOMEM;
+
+ hw->hw_info.share->epnum = hw->max_epid;
+
+ return 0;
+}
+
+static void fjes_hw_free_shared_status_region(struct fjes_hw *hw)
+{
+ kfree(hw->hw_info.share);
+ hw->hw_info.share = NULL;
+}
+
+static int fjes_hw_alloc_epbuf(struct epbuf_handler *epbh)
+{
+ void *mem;
+
+ mem = vzalloc(EP_BUFFER_SIZE);
+ if (!mem)
+ return -ENOMEM;
+
+ epbh->buffer = mem;
+ epbh->size = EP_BUFFER_SIZE;
+
+ epbh->info = (union ep_buffer_info *)mem;
+ epbh->ring = (u8 *)(mem + sizeof(union ep_buffer_info));
+
+ return 0;
+}
+
+static void fjes_hw_free_epbuf(struct epbuf_handler *epbh)
+{
+ if (epbh->buffer)
+ vfree(epbh->buffer);
+
+ epbh->buffer = NULL;
+ epbh->size = 0;
+
+ epbh->info = NULL;
+ epbh->ring = NULL;
+}
+
+void fjes_hw_setup_epbuf(struct epbuf_handler *epbh, u8 *mac_addr, u32 mtu)
+{
+ union ep_buffer_info *info = epbh->info;
+ u16 vlan_id[EP_BUFFER_SUPPORT_VLAN_MAX];
+ int i;
+
+ for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++)
+ vlan_id[i] = info->v1i.vlan_id[i];
+
+ memset(info, 0, sizeof(union ep_buffer_info));
+
+ info->v1i.version = 0; /* version 0 */
+
+ for (i = 0; i < ETH_ALEN; i++)
+ info->v1i.mac_addr[i] = mac_addr[i];
+
+ info->v1i.head = 0;
+ info->v1i.tail = 1;
+
+ info->v1i.info_size = sizeof(union ep_buffer_info);
+ info->v1i.buffer_size = epbh->size - info->v1i.info_size;
+
+ info->v1i.frame_max = FJES_MTU_TO_FRAME_SIZE(mtu);
+ info->v1i.count_max =
+ EP_RING_NUM(info->v1i.buffer_size, info->v1i.frame_max);
+
+ for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++)
+ info->v1i.vlan_id[i] = vlan_id[i];
+}
+
+void
+fjes_hw_init_command_registers(struct fjes_hw *hw,
+ struct fjes_device_command_param *param)
+{
+ /* Request Buffer length */
+ wr32(XSCT_REQBL, (__le32)(param->req_len));
+ /* Response Buffer Length */
+ wr32(XSCT_RESPBL, (__le32)(param->res_len));
+
+ /* Request Buffer Address */
+ wr32(XSCT_REQBAL,
+ (__le32)(param->req_start & GENMASK_ULL(31, 0)));
+ wr32(XSCT_REQBAH,
+ (__le32)((param->req_start & GENMASK_ULL(63, 32)) >> 32));
+
+ /* Response Buffer Address */
+ wr32(XSCT_RESPBAL,
+ (__le32)(param->res_start & GENMASK_ULL(31, 0)));
+ wr32(XSCT_RESPBAH,
+ (__le32)((param->res_start & GENMASK_ULL(63, 32)) >> 32));
+
+ /* Share status address */
+ wr32(XSCT_SHSTSAL,
+ (__le32)(param->share_start & GENMASK_ULL(31, 0)));
+ wr32(XSCT_SHSTSAH,
+ (__le32)((param->share_start & GENMASK_ULL(63, 32)) >> 32));
+}
+
+static int fjes_hw_setup(struct fjes_hw *hw)
+{
+ u8 mac[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+ struct fjes_device_command_param param;
+ struct ep_share_mem_info *buf_pair;
+ size_t mem_size;
+ int result;
+ int epidx;
+ void *buf;
+
+ hw->hw_info.max_epid = &hw->max_epid;
+ hw->hw_info.my_epid = &hw->my_epid;
+
+ buf = kcalloc(hw->max_epid, sizeof(struct ep_share_mem_info),
+ GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ hw->ep_shm_info = (struct ep_share_mem_info *)buf;
+
+ mem_size = FJES_DEV_REQ_BUF_SIZE(hw->max_epid);
+ hw->hw_info.req_buf = kzalloc(mem_size, GFP_KERNEL);
+ if (!(hw->hw_info.req_buf))
+ return -ENOMEM;
+
+ hw->hw_info.req_buf_size = mem_size;
+
+ mem_size = FJES_DEV_RES_BUF_SIZE(hw->max_epid);
+ hw->hw_info.res_buf = kzalloc(mem_size, GFP_KERNEL);
+ if (!(hw->hw_info.res_buf))
+ return -ENOMEM;
+
+ hw->hw_info.res_buf_size = mem_size;
+
+ result = fjes_hw_alloc_shared_status_region(hw);
+ if (result)
+ return result;
+
+ hw->hw_info.buffer_share_bit = 0;
+ hw->hw_info.buffer_unshare_reserve_bit = 0;
+
+ for (epidx = 0; epidx < hw->max_epid; epidx++) {
+ if (epidx != hw->my_epid) {
+ buf_pair = &hw->ep_shm_info[epidx];
+
+ result = fjes_hw_alloc_epbuf(&buf_pair->tx);
+ if (result)
+ return result;
+
+ result = fjes_hw_alloc_epbuf(&buf_pair->rx);
+ if (result)
+ return result;
+
+ fjes_hw_setup_epbuf(&buf_pair->tx, mac,
+ fjes_support_mtu[0]);
+ fjes_hw_setup_epbuf(&buf_pair->rx, mac,
+ fjes_support_mtu[0]);
+ }
+ }
+
+ memset(&param, 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, &param);
+
+ return 0;
+}
+
+static void fjes_hw_cleanup(struct fjes_hw *hw)
+{
+ int epidx;
+
+ if (!hw->ep_shm_info)
+ return;
+
+ fjes_hw_free_shared_status_region(hw);
+
+ kfree(hw->hw_info.req_buf);
+ hw->hw_info.req_buf = NULL;
+
+ kfree(hw->hw_info.res_buf);
+ hw->hw_info.res_buf = NULL;
+
+ for (epidx = 0; epidx < hw->max_epid ; epidx++) {
+ if (epidx == hw->my_epid)
+ continue;
+ fjes_hw_free_epbuf(&hw->ep_shm_info[epidx].tx);
+ fjes_hw_free_epbuf(&hw->ep_shm_info[epidx].rx);
+ }
+
+ kfree(hw->ep_shm_info);
+ hw->ep_shm_info = NULL;
+}
+
+int fjes_hw_init(struct fjes_hw *hw)
+{
+ int ret;
+
+ hw->base = fjes_hw_iomap(hw);
+ if (!hw->base)
+ return -EIO;
+
+ ret = fjes_hw_reset(hw);
+ if (ret)
+ return ret;
+
+ fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
+
+ INIT_WORK(&hw->update_zone_task, fjes_hw_update_zone_task);
+ INIT_WORK(&hw->epstop_task, fjes_hw_epstop_task);
+
+ mutex_init(&hw->hw_info.lock);
+
+ hw->max_epid = fjes_hw_get_max_epid(hw);
+ hw->my_epid = fjes_hw_get_my_epid(hw);
+
+ if ((hw->max_epid == 0) || (hw->my_epid >= hw->max_epid))
+ return -ENXIO;
+
+ ret = fjes_hw_setup(hw);
+
+ return ret;
+}
+
+void fjes_hw_exit(struct fjes_hw *hw)
+{
+ int ret;
+
+ if (hw->base) {
+ ret = fjes_hw_reset(hw);
+ if (ret)
+ pr_err("%s: reset error", __func__);
+
+ fjes_hw_iounmap(hw);
+ hw->base = NULL;
+ }
+
+ fjes_hw_cleanup(hw);
+
+ cancel_work_sync(&hw->update_zone_task);
+ cancel_work_sync(&hw->epstop_task);
+}
+
+static enum fjes_dev_command_response_e
+fjes_hw_issue_request_command(struct fjes_hw *hw,
+ enum fjes_dev_command_request_type type)
+{
+ enum fjes_dev_command_response_e ret = FJES_CMD_STATUS_UNKNOWN;
+ union REG_CR cr;
+ union REG_CS cs;
+ int timeout;
+
+ cr.reg = 0;
+ cr.bits.req_start = 1;
+ cr.bits.req_code = type;
+ wr32(XSCT_CR, cr.reg);
+ cr.reg = rd32(XSCT_CR);
+
+ if (cr.bits.error == 0) {
+ timeout = FJES_COMMAND_REQ_TIMEOUT * 1000;
+ cs.reg = rd32(XSCT_CS);
+
+ while ((cs.bits.complete != 1) && timeout > 0) {
+ msleep(1000);
+ cs.reg = rd32(XSCT_CS);
+ timeout -= 1000;
+ }
+
+ if (cs.bits.complete == 1)
+ ret = FJES_CMD_STATUS_NORMAL;
+ else if (timeout <= 0)
+ ret = FJES_CMD_STATUS_TIMEOUT;
+
+ } else {
+ switch (cr.bits.err_info) {
+ case FJES_CMD_REQ_ERR_INFO_PARAM:
+ ret = FJES_CMD_STATUS_ERROR_PARAM;
+ break;
+ case FJES_CMD_REQ_ERR_INFO_STATUS:
+ ret = FJES_CMD_STATUS_ERROR_STATUS;
+ break;
+ default:
+ ret = FJES_CMD_STATUS_UNKNOWN;
+ break;
+ }
+ }
+
+ return ret;
+}
+
+int fjes_hw_request_info(struct fjes_hw *hw)
+{
+ union fjes_device_command_req *req_buf = hw->hw_info.req_buf;
+ union fjes_device_command_res *res_buf = hw->hw_info.res_buf;
+ enum fjes_dev_command_response_e ret;
+ int result;
+
+ memset(req_buf, 0, hw->hw_info.req_buf_size);
+ memset(res_buf, 0, hw->hw_info.res_buf_size);
+
+ req_buf->info.length = FJES_DEV_COMMAND_INFO_REQ_LEN;
+
+ res_buf->info.length = 0;
+ res_buf->info.code = 0;
+
+ ret = fjes_hw_issue_request_command(hw, FJES_CMD_REQ_INFO);
+
+ result = 0;
+
+ if (FJES_DEV_COMMAND_INFO_RES_LEN((*hw->hw_info.max_epid)) !=
+ res_buf->info.length) {
+ result = -ENOMSG;
+ } else if (ret == FJES_CMD_STATUS_NORMAL) {
+ switch (res_buf->info.code) {
+ case FJES_CMD_REQ_RES_CODE_NORMAL:
+ result = 0;
+ break;
+ default:
+ result = -EPERM;
+ break;
+ }
+ } else {
+ switch (ret) {
+ case FJES_CMD_STATUS_UNKNOWN:
+ result = -EPERM;
+ break;
+ case FJES_CMD_STATUS_TIMEOUT:
+ result = -EBUSY;
+ break;
+ case FJES_CMD_STATUS_ERROR_PARAM:
+ result = -EPERM;
+ break;
+ case FJES_CMD_STATUS_ERROR_STATUS:
+ result = -EPERM;
+ break;
+ default:
+ result = -EPERM;
+ break;
+ }
+ }
+
+ return result;
+}
+
+int fjes_hw_register_buff_addr(struct fjes_hw *hw, int dest_epid,
+ struct ep_share_mem_info *buf_pair)
+{
+ union fjes_device_command_req *req_buf = hw->hw_info.req_buf;
+ union fjes_device_command_res *res_buf = hw->hw_info.res_buf;
+ enum fjes_dev_command_response_e ret;
+ int page_count;
+ int timeout;
+ int i, idx;
+ void *addr;
+ int result;
+
+ if (test_bit(dest_epid, &hw->hw_info.buffer_share_bit))
+ return 0;
+
+ memset(req_buf, 0, hw->hw_info.req_buf_size);
+ memset(res_buf, 0, hw->hw_info.res_buf_size);
+
+ req_buf->share_buffer.length = FJES_DEV_COMMAND_SHARE_BUFFER_REQ_LEN(
+ buf_pair->tx.size,
+ buf_pair->rx.size);
+ req_buf->share_buffer.epid = dest_epid;
+
+ idx = 0;
+ req_buf->share_buffer.buffer[idx++] = buf_pair->tx.size;
+ page_count = buf_pair->tx.size / EP_BUFFER_INFO_SIZE;
+ for (i = 0; i < page_count; i++) {
+ addr = ((u8 *)(buf_pair->tx.buffer)) +
+ (i * EP_BUFFER_INFO_SIZE);
+ req_buf->share_buffer.buffer[idx++] =
+ (__le64)(page_to_phys(vmalloc_to_page(addr)) +
+ offset_in_page(addr));
+ }
+
+ req_buf->share_buffer.buffer[idx++] = buf_pair->rx.size;
+ page_count = buf_pair->rx.size / EP_BUFFER_INFO_SIZE;
+ for (i = 0; i < page_count; i++) {
+ addr = ((u8 *)(buf_pair->rx.buffer)) +
+ (i * EP_BUFFER_INFO_SIZE);
+ req_buf->share_buffer.buffer[idx++] =
+ (__le64)(page_to_phys(vmalloc_to_page(addr)) +
+ offset_in_page(addr));
+ }
+
+ res_buf->share_buffer.length = 0;
+ res_buf->share_buffer.code = 0;
+
+ ret = fjes_hw_issue_request_command(hw, FJES_CMD_REQ_SHARE_BUFFER);
+
+ timeout = FJES_COMMAND_REQ_BUFF_TIMEOUT * 1000;
+ while ((ret == FJES_CMD_STATUS_NORMAL) &&
+ (res_buf->share_buffer.length ==
+ FJES_DEV_COMMAND_SHARE_BUFFER_RES_LEN) &&
+ (res_buf->share_buffer.code == FJES_CMD_REQ_RES_CODE_BUSY) &&
+ (timeout > 0)) {
+ msleep(200 + hw->my_epid * 20);
+ timeout -= (200 + hw->my_epid * 20);
+
+ res_buf->share_buffer.length = 0;
+ res_buf->share_buffer.code = 0;
+
+ ret = fjes_hw_issue_request_command(
+ hw, FJES_CMD_REQ_SHARE_BUFFER);
+ }
+
+ result = 0;
+
+ if (res_buf->share_buffer.length !=
+ FJES_DEV_COMMAND_SHARE_BUFFER_RES_LEN)
+ result = -ENOMSG;
+ else if (ret == FJES_CMD_STATUS_NORMAL) {
+ switch (res_buf->share_buffer.code) {
+ case FJES_CMD_REQ_RES_CODE_NORMAL:
+ result = 0;
+ set_bit(dest_epid, &hw->hw_info.buffer_share_bit);
+ break;
+ case FJES_CMD_REQ_RES_CODE_BUSY:
+ result = -EBUSY;
+ break;
+ default:
+ result = -EPERM;
+ break;
+ }
+ } else {
+ switch (ret) {
+ case FJES_CMD_STATUS_UNKNOWN:
+ result = -EPERM;
+ break;
+ case FJES_CMD_STATUS_TIMEOUT:
+ result = -EBUSY;
+ break;
+ case FJES_CMD_STATUS_ERROR_PARAM:
+ case FJES_CMD_STATUS_ERROR_STATUS:
+ default:
+ result = -EPERM;
+ break;
+ }
+ }
+
+ return result;
+}
+
+int fjes_hw_unregister_buff_addr(struct fjes_hw *hw, int dest_epid)
+{
+ union fjes_device_command_req *req_buf = hw->hw_info.req_buf;
+ union fjes_device_command_res *res_buf = hw->hw_info.res_buf;
+ struct fjes_device_shared_info *share = hw->hw_info.share;
+ enum fjes_dev_command_response_e ret;
+ int timeout;
+ int result;
+
+ if (!hw->base)
+ return -EPERM;
+
+ if (!req_buf || !res_buf || !share)
+ return -EPERM;
+
+ if (!test_bit(dest_epid, &hw->hw_info.buffer_share_bit))
+ return 0;
+
+ memset(req_buf, 0, hw->hw_info.req_buf_size);
+ memset(res_buf, 0, hw->hw_info.res_buf_size);
+
+ req_buf->unshare_buffer.length =
+ FJES_DEV_COMMAND_UNSHARE_BUFFER_REQ_LEN;
+ req_buf->unshare_buffer.epid = dest_epid;
+
+ res_buf->unshare_buffer.length = 0;
+ res_buf->unshare_buffer.code = 0;
+
+ ret = fjes_hw_issue_request_command(hw, FJES_CMD_REQ_UNSHARE_BUFFER);
+
+ timeout = FJES_COMMAND_REQ_BUFF_TIMEOUT * 1000;
+ while ((ret == FJES_CMD_STATUS_NORMAL) &&
+ (res_buf->unshare_buffer.length ==
+ FJES_DEV_COMMAND_UNSHARE_BUFFER_RES_LEN) &&
+ (res_buf->unshare_buffer.code ==
+ FJES_CMD_REQ_RES_CODE_BUSY) &&
+ (timeout > 0)) {
+ msleep(200 + hw->my_epid * 20);
+ timeout -= (200 + hw->my_epid * 20);
+
+ res_buf->unshare_buffer.length = 0;
+ res_buf->unshare_buffer.code = 0;
+
+ ret =
+ fjes_hw_issue_request_command(hw, FJES_CMD_REQ_UNSHARE_BUFFER);
+ }
+
+ result = 0;
+
+ if (res_buf->unshare_buffer.length !=
+ FJES_DEV_COMMAND_UNSHARE_BUFFER_RES_LEN) {
+ result = -ENOMSG;
+ } else if (ret == FJES_CMD_STATUS_NORMAL) {
+ switch (res_buf->unshare_buffer.code) {
+ case FJES_CMD_REQ_RES_CODE_NORMAL:
+ result = 0;
+ clear_bit(dest_epid, &hw->hw_info.buffer_share_bit);
+ break;
+ case FJES_CMD_REQ_RES_CODE_BUSY:
+ result = -EBUSY;
+ break;
+ default:
+ result = -EPERM;
+ break;
+ }
+ } else {
+ switch (ret) {
+ case FJES_CMD_STATUS_UNKNOWN:
+ result = -EPERM;
+ break;
+ case FJES_CMD_STATUS_TIMEOUT:
+ result = -EBUSY;
+ break;
+ case FJES_CMD_STATUS_ERROR_PARAM:
+ case FJES_CMD_STATUS_ERROR_STATUS:
+ default:
+ result = -EPERM;
+ break;
+ }
+ }
+
+ return result;
+}
+
+int fjes_hw_raise_interrupt(struct fjes_hw *hw, int dest_epid,
+ enum REG_ICTL_MASK mask)
+{
+ u32 ig = mask | dest_epid;
+
+ wr32(XSCT_IG, cpu_to_le32(ig));
+
+ return 0;
+}
+
+u32 fjes_hw_capture_interrupt_status(struct fjes_hw *hw)
+{
+ u32 cur_is;
+
+ cur_is = rd32(XSCT_IS);
+
+ return cur_is;
+}
+
+void fjes_hw_set_irqmask(struct fjes_hw *hw,
+ enum REG_ICTL_MASK intr_mask, bool mask)
+{
+ if (mask)
+ wr32(XSCT_IMS, intr_mask);
+ else
+ wr32(XSCT_IMC, intr_mask);
+}
+
+bool fjes_hw_epid_is_same_zone(struct fjes_hw *hw, int epid)
+{
+ if (epid >= hw->max_epid)
+ return false;
+
+ if ((hw->ep_shm_info[epid].es_status !=
+ FJES_ZONING_STATUS_ENABLE) ||
+ (hw->ep_shm_info[hw->my_epid].zone ==
+ FJES_ZONING_ZONE_TYPE_NONE))
+ return false;
+ else
+ return (hw->ep_shm_info[epid].zone ==
+ hw->ep_shm_info[hw->my_epid].zone);
+}
+
+int fjes_hw_epid_is_shared(struct fjes_device_shared_info *share,
+ int dest_epid)
+{
+ int value = false;
+
+ if (dest_epid < share->epnum)
+ value = share->ep_status[dest_epid];
+
+ return value;
+}
+
+static bool fjes_hw_epid_is_stop_requested(struct fjes_hw *hw, int src_epid)
+{
+ return test_bit(src_epid, &hw->txrx_stop_req_bit);
+}
+
+static bool fjes_hw_epid_is_stop_process_done(struct fjes_hw *hw, int src_epid)
+{
+ return (hw->ep_shm_info[src_epid].tx.info->v1i.rx_status &
+ FJES_RX_STOP_REQ_DONE);
+}
+
+enum ep_partner_status
+fjes_hw_get_partner_ep_status(struct fjes_hw *hw, int epid)
+{
+ enum ep_partner_status status;
+
+ if (fjes_hw_epid_is_shared(hw->hw_info.share, epid)) {
+ if (fjes_hw_epid_is_stop_requested(hw, epid)) {
+ status = EP_PARTNER_WAITING;
+ } else {
+ if (fjes_hw_epid_is_stop_process_done(hw, epid))
+ status = EP_PARTNER_COMPLETE;
+ else
+ status = EP_PARTNER_SHARED;
+ }
+ } else {
+ status = EP_PARTNER_UNSHARE;
+ }
+
+ return status;
+}
+
+void fjes_hw_raise_epstop(struct fjes_hw *hw)
+{
+ enum ep_partner_status status;
+ int epidx;
+
+ for (epidx = 0; epidx < hw->max_epid; epidx++) {
+ if (epidx == hw->my_epid)
+ continue;
+
+ status = fjes_hw_get_partner_ep_status(hw, epidx);
+ switch (status) {
+ case EP_PARTNER_SHARED:
+ fjes_hw_raise_interrupt(hw, epidx,
+ REG_ICTL_MASK_TXRX_STOP_REQ);
+ break;
+ default:
+ break;
+ }
+
+ set_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
+ set_bit(epidx, &hw->txrx_stop_req_bit);
+
+ hw->ep_shm_info[epidx].tx.info->v1i.rx_status |=
+ FJES_RX_STOP_REQ_REQUEST;
+ }
+}
+
+int fjes_hw_wait_epstop(struct fjes_hw *hw)
+{
+ enum ep_partner_status status;
+ union ep_buffer_info *info;
+ int wait_time = 0;
+ int epidx;
+
+ while (hw->hw_info.buffer_unshare_reserve_bit &&
+ (wait_time < FJES_COMMAND_EPSTOP_WAIT_TIMEOUT * 1000)) {
+ for (epidx = 0; epidx < hw->max_epid; epidx++) {
+ if (epidx == hw->my_epid)
+ continue;
+ status = fjes_hw_epid_is_shared(hw->hw_info.share,
+ epidx);
+ info = hw->ep_shm_info[epidx].rx.info;
+ if ((!status ||
+ (info->v1i.rx_status &
+ FJES_RX_STOP_REQ_DONE)) &&
+ test_bit(epidx,
+ &hw->hw_info.buffer_unshare_reserve_bit)) {
+ clear_bit(epidx,
+ &hw->hw_info.buffer_unshare_reserve_bit);
+ }
+ }
+
+ msleep(100);
+ wait_time += 100;
+ }
+
+ 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))
+ clear_bit(epidx,
+ &hw->hw_info.buffer_unshare_reserve_bit);
+ }
+
+ return (wait_time < FJES_COMMAND_EPSTOP_WAIT_TIMEOUT * 1000)
+ ? 0 : -EBUSY;
+}
+
+bool fjes_hw_check_epbuf_version(struct epbuf_handler *epbh, u32 version)
+{
+ union ep_buffer_info *info = epbh->info;
+
+ return (info->common.version == version);
+}
+
+bool fjes_hw_check_mtu(struct epbuf_handler *epbh, u32 mtu)
+{
+ union ep_buffer_info *info = epbh->info;
+
+ return (info->v1i.frame_max == FJES_MTU_TO_FRAME_SIZE(mtu));
+}
+
+bool fjes_hw_check_vlan_id(struct epbuf_handler *epbh, u16 vlan_id)
+{
+ union ep_buffer_info *info = epbh->info;
+ bool ret = false;
+ int i;
+
+ if (vlan_id == 0) {
+ ret = true;
+ } else {
+ for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++) {
+ if (vlan_id == info->v1i.vlan_id[i]) {
+ ret = true;
+ break;
+ }
+ }
+ }
+ return ret;
+}
+
+bool fjes_hw_set_vlan_id(struct epbuf_handler *epbh, u16 vlan_id)
+{
+ union ep_buffer_info *info = epbh->info;
+ int i;
+
+ for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++) {
+ if (info->v1i.vlan_id[i] == 0) {
+ info->v1i.vlan_id[i] = vlan_id;
+ return true;
+ }
+ }
+ return false;
+}
+
+void fjes_hw_del_vlan_id(struct epbuf_handler *epbh, u16 vlan_id)
+{
+ union ep_buffer_info *info = epbh->info;
+ int i;
+
+ if (0 != vlan_id) {
+ for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++) {
+ if (vlan_id == info->v1i.vlan_id[i])
+ info->v1i.vlan_id[i] = 0;
+ }
+ }
+}
+
+bool fjes_hw_epbuf_rx_is_empty(struct epbuf_handler *epbh)
+{
+ union ep_buffer_info *info = epbh->info;
+
+ if (info->v1i.count_max == 0)
+ return true;
+
+ return EP_RING_EMPTY(info->v1i.head, info->v1i.tail,
+ info->v1i.count_max);
+}
+
+void *fjes_hw_epbuf_rx_curpkt_get_addr(struct epbuf_handler *epbh,
+ size_t *psize)
+{
+ union ep_buffer_info *info = epbh->info;
+ struct esmem_frame *ring_frame;
+ void *frame;
+
+ ring_frame = (struct esmem_frame *)&(epbh->ring[EP_RING_INDEX
+ (info->v1i.head,
+ info->v1i.count_max) *
+ info->v1i.frame_max]);
+
+ *psize = (size_t)ring_frame->frame_size;
+
+ frame = ring_frame->frame_data;
+
+ return frame;
+}
+
+void fjes_hw_epbuf_rx_curpkt_drop(struct epbuf_handler *epbh)
+{
+ union ep_buffer_info *info = epbh->info;
+
+ if (fjes_hw_epbuf_rx_is_empty(epbh))
+ return;
+
+ EP_RING_INDEX_INC(epbh->info->v1i.head, info->v1i.count_max);
+}
+
+int fjes_hw_epbuf_tx_pkt_send(struct epbuf_handler *epbh,
+ void *frame, size_t size)
+{
+ union ep_buffer_info *info = epbh->info;
+ struct esmem_frame *ring_frame;
+
+ if (EP_RING_FULL(info->v1i.head, info->v1i.tail, info->v1i.count_max))
+ return -ENOBUFS;
+
+ ring_frame = (struct esmem_frame *)&(epbh->ring[EP_RING_INDEX
+ (info->v1i.tail - 1,
+ info->v1i.count_max) *
+ info->v1i.frame_max]);
+
+ ring_frame->frame_size = size;
+ memcpy((void *)(ring_frame->frame_data), (void *)frame, size);
+
+ EP_RING_INDEX_INC(epbh->info->v1i.tail, info->v1i.count_max);
+
+ return 0;
+}
+
+static void fjes_hw_update_zone_task(struct work_struct *work)
+{
+ struct fjes_hw *hw = container_of(work,
+ struct fjes_hw, update_zone_task);
+
+ struct my_s {u8 es_status; u8 zone; } *info;
+ union fjes_device_command_res *res_buf;
+ enum ep_partner_status pstatus;
+
+ struct fjes_adapter *adapter;
+ struct net_device *netdev;
+
+ ulong unshare_bit = 0;
+ ulong share_bit = 0;
+ ulong irq_bit = 0;
+
+ int epidx;
+ int ret;
+
+ adapter = (struct fjes_adapter *)hw->back;
+ netdev = adapter->netdev;
+ res_buf = hw->hw_info.res_buf;
+ info = (struct my_s *)&res_buf->info.info;
+
+ mutex_lock(&hw->hw_info.lock);
+
+ ret = fjes_hw_request_info(hw);
+ switch (ret) {
+ case -ENOMSG:
+ case -EBUSY:
+ default:
+ if (!work_pending(&adapter->force_close_task)) {
+ adapter->force_reset = true;
+ schedule_work(&adapter->force_close_task);
+ }
+ break;
+
+ case 0:
+
+ for (epidx = 0; epidx < hw->max_epid; epidx++) {
+ if (epidx == hw->my_epid) {
+ hw->ep_shm_info[epidx].es_status =
+ info[epidx].es_status;
+ hw->ep_shm_info[epidx].zone =
+ info[epidx].zone;
+ continue;
+ }
+
+ pstatus = fjes_hw_get_partner_ep_status(hw, epidx);
+ switch (pstatus) {
+ case EP_PARTNER_UNSHARE:
+ default:
+ if ((info[epidx].zone !=
+ FJES_ZONING_ZONE_TYPE_NONE) &&
+ (info[epidx].es_status ==
+ FJES_ZONING_STATUS_ENABLE) &&
+ (info[epidx].zone ==
+ info[hw->my_epid].zone))
+ set_bit(epidx, &share_bit);
+ else
+ set_bit(epidx, &unshare_bit);
+ break;
+
+ case EP_PARTNER_COMPLETE:
+ case EP_PARTNER_WAITING:
+ if ((info[epidx].zone ==
+ FJES_ZONING_ZONE_TYPE_NONE) ||
+ (info[epidx].es_status !=
+ FJES_ZONING_STATUS_ENABLE) ||
+ (info[epidx].zone !=
+ info[hw->my_epid].zone)) {
+ set_bit(epidx,
+ &adapter->unshare_watch_bitmask);
+ set_bit(epidx,
+ &hw->hw_info.buffer_unshare_reserve_bit);
+ }
+ break;
+
+ case EP_PARTNER_SHARED:
+ if ((info[epidx].zone ==
+ FJES_ZONING_ZONE_TYPE_NONE) ||
+ (info[epidx].es_status !=
+ FJES_ZONING_STATUS_ENABLE) ||
+ (info[epidx].zone !=
+ info[hw->my_epid].zone))
+ set_bit(epidx, &irq_bit);
+ break;
+ }
+ }
+
+ hw->ep_shm_info[epidx].es_status = info[epidx].es_status;
+ hw->ep_shm_info[epidx].zone = info[epidx].zone;
+
+ break;
+ }
+
+ mutex_unlock(&hw->hw_info.lock);
+
+ for (epidx = 0; epidx < hw->max_epid; epidx++) {
+ if (epidx == hw->my_epid)
+ continue;
+
+ if (test_bit(epidx, &share_bit)) {
+ fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
+ netdev->dev_addr, netdev->mtu);
+
+ mutex_lock(&hw->hw_info.lock);
+
+ ret = fjes_hw_register_buff_addr(
+ hw, epidx, &hw->ep_shm_info[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);
+ }
+
+ if (test_bit(epidx, &unshare_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);
+
+ if (ret == 0)
+ fjes_hw_setup_epbuf(
+ &hw->ep_shm_info[epidx].tx,
+ netdev->dev_addr, netdev->mtu);
+ }
+
+ if (test_bit(epidx, &irq_bit)) {
+ fjes_hw_raise_interrupt(hw, epidx,
+ REG_ICTL_MASK_TXRX_STOP_REQ);
+
+ set_bit(epidx, &hw->txrx_stop_req_bit);
+ hw->ep_shm_info[epidx].tx.
+ info->v1i.rx_status |=
+ FJES_RX_STOP_REQ_REQUEST;
+ set_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
+ }
+ }
+
+ if (irq_bit || adapter->unshare_watch_bitmask) {
+ if (!work_pending(&adapter->unshare_watch_task))
+ queue_work(adapter->control_wq,
+ &adapter->unshare_watch_task);
+ }
+}
+
+static void fjes_hw_epstop_task(struct work_struct *work)
+{
+ struct fjes_hw *hw = container_of(work, struct fjes_hw, epstop_task);
+ struct fjes_adapter *adapter = (struct fjes_adapter *)hw->back;
+
+ ulong remain_bit;
+ int epid_bit;
+
+ while ((remain_bit = hw->epstop_req_bit)) {
+ for (epid_bit = 0; remain_bit; remain_bit >>= 1, epid_bit++) {
+ if (remain_bit & 1) {
+ hw->ep_shm_info[epid_bit].
+ tx.info->v1i.rx_status |=
+ FJES_RX_STOP_REQ_DONE;
+
+ clear_bit(epid_bit, &hw->epstop_req_bit);
+ set_bit(epid_bit,
+ &adapter->unshare_watch_bitmask);
+
+ if (!work_pending(&adapter->unshare_watch_task))
+ queue_work(
+ adapter->control_wq,
+ &adapter->unshare_watch_task);
+ }
+ }
+ }
+}
diff --git a/drivers/net/fjes/fjes_hw.h b/drivers/net/fjes/fjes_hw.h
new file mode 100644
index 000000000000..6d57b89a0ee8
--- /dev/null
+++ b/drivers/net/fjes/fjes_hw.h
@@ -0,0 +1,334 @@
+/*
+ * 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".
+ *
+ */
+
+#ifndef FJES_HW_H_
+#define FJES_HW_H_
+
+#include <linux/netdevice.h>
+#include <linux/if_vlan.h>
+#include <linux/vmalloc.h>
+
+#include "fjes_regs.h"
+
+struct fjes_hw;
+
+#define EP_BUFFER_SUPPORT_VLAN_MAX 4
+#define EP_BUFFER_INFO_SIZE 4096
+
+#define FJES_DEVICE_RESET_TIMEOUT ((17 + 1) * 3) /* sec */
+#define FJES_COMMAND_REQ_TIMEOUT (5 + 1) /* sec */
+#define FJES_COMMAND_REQ_BUFF_TIMEOUT (8 * 3) /* sec */
+#define FJES_COMMAND_EPSTOP_WAIT_TIMEOUT (1) /* sec */
+
+#define FJES_CMD_REQ_ERR_INFO_PARAM (0x0001)
+#define FJES_CMD_REQ_ERR_INFO_STATUS (0x0002)
+
+#define FJES_CMD_REQ_RES_CODE_NORMAL (0)
+#define FJES_CMD_REQ_RES_CODE_BUSY (1)
+
+#define FJES_ZONING_STATUS_DISABLE (0x00)
+#define FJES_ZONING_STATUS_ENABLE (0x01)
+#define FJES_ZONING_STATUS_INVALID (0xFF)
+
+#define FJES_ZONING_ZONE_TYPE_NONE (0xFF)
+
+#define FJES_TX_DELAY_SEND_NONE (0)
+#define FJES_TX_DELAY_SEND_PENDING (1)
+
+#define FJES_RX_STOP_REQ_NONE (0x0)
+#define FJES_RX_STOP_REQ_DONE (0x1)
+#define FJES_RX_STOP_REQ_REQUEST (0x2)
+#define FJES_RX_POLL_WORK (0x4)
+
+#define EP_BUFFER_SIZE \
+ (((sizeof(union ep_buffer_info) + (128 * (64 * 1024))) \
+ / EP_BUFFER_INFO_SIZE) * EP_BUFFER_INFO_SIZE)
+
+#define EP_RING_NUM(buffer_size, frame_size) \
+ (u32)((buffer_size) / (frame_size))
+#define EP_RING_INDEX(_num, _max) (((_num) + (_max)) % (_max))
+#define EP_RING_INDEX_INC(_num, _max) \
+ ((_num) = EP_RING_INDEX((_num) + 1, (_max)))
+#define EP_RING_FULL(_head, _tail, _max) \
+ (0 == EP_RING_INDEX(((_tail) - (_head)), (_max)))
+#define EP_RING_EMPTY(_head, _tail, _max) \
+ (1 == EP_RING_INDEX(((_tail) - (_head)), (_max)))
+
+#define FJES_MTU_TO_BUFFER_SIZE(mtu) \
+ (ETH_HLEN + VLAN_HLEN + (mtu) + ETH_FCS_LEN)
+#define FJES_MTU_TO_FRAME_SIZE(mtu) \
+ (sizeof(struct esmem_frame) + FJES_MTU_TO_BUFFER_SIZE(mtu))
+#define FJES_MTU_DEFINE(size) \
+ ((size) - sizeof(struct esmem_frame) - \
+ (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN))
+
+#define FJES_DEV_COMMAND_INFO_REQ_LEN (4)
+#define FJES_DEV_COMMAND_INFO_RES_LEN(epnum) (8 + 2 * (epnum))
+#define FJES_DEV_COMMAND_SHARE_BUFFER_REQ_LEN(txb, rxb) \
+ (24 + (8 * ((txb) / EP_BUFFER_INFO_SIZE + (rxb) / EP_BUFFER_INFO_SIZE)))
+#define FJES_DEV_COMMAND_SHARE_BUFFER_RES_LEN (8)
+#define FJES_DEV_COMMAND_UNSHARE_BUFFER_REQ_LEN (8)
+#define FJES_DEV_COMMAND_UNSHARE_BUFFER_RES_LEN (8)
+
+#define FJES_DEV_REQ_BUF_SIZE(maxep) \
+ FJES_DEV_COMMAND_SHARE_BUFFER_REQ_LEN(EP_BUFFER_SIZE, EP_BUFFER_SIZE)
+#define FJES_DEV_RES_BUF_SIZE(maxep) \
+ FJES_DEV_COMMAND_INFO_RES_LEN(maxep)
+
+/* Frame & MTU */
+struct esmem_frame {
+ __le32 frame_size;
+ u8 frame_data[];
+};
+
+/* EP partner status */
+enum ep_partner_status {
+ EP_PARTNER_UNSHARE,
+ EP_PARTNER_SHARED,
+ EP_PARTNER_WAITING,
+ EP_PARTNER_COMPLETE,
+ EP_PARTNER_STATUS_MAX,
+};
+
+/* shared status region */
+struct fjes_device_shared_info {
+ int epnum;
+ u8 ep_status[];
+};
+
+/* structures for command control request data*/
+union fjes_device_command_req {
+ struct {
+ __le32 length;
+ } info;
+ struct {
+ __le32 length;
+ __le32 epid;
+ __le64 buffer[];
+ } share_buffer;
+ struct {
+ __le32 length;
+ __le32 epid;
+ } unshare_buffer;
+ struct {
+ __le32 length;
+ __le32 mode;
+ __le64 buffer_len;
+ __le64 buffer[];
+ } start_trace;
+ struct {
+ __le32 length;
+ } stop_trace;
+};
+
+/* structures for command control response data */
+union fjes_device_command_res {
+ struct {
+ __le32 length;
+ __le32 code;
+ struct {
+ u8 es_status;
+ u8 zone;
+ } info[];
+ } info;
+ struct {
+ __le32 length;
+ __le32 code;
+ } share_buffer;
+ struct {
+ __le32 length;
+ __le32 code;
+ } unshare_buffer;
+ struct {
+ __le32 length;
+ __le32 code;
+ } start_trace;
+ struct {
+ __le32 length;
+ __le32 code;
+ } stop_trace;
+};
+
+/* request command type */
+enum fjes_dev_command_request_type {
+ FJES_CMD_REQ_INFO = 0x0001,
+ FJES_CMD_REQ_SHARE_BUFFER = 0x0002,
+ FJES_CMD_REQ_UNSHARE_BUFFER = 0x0004,
+};
+
+/* parameter for command control */
+struct fjes_device_command_param {
+ u32 req_len;
+ phys_addr_t req_start;
+ u32 res_len;
+ phys_addr_t res_start;
+ phys_addr_t share_start;
+};
+
+/* error code for command control */
+enum fjes_dev_command_response_e {
+ FJES_CMD_STATUS_UNKNOWN,
+ FJES_CMD_STATUS_NORMAL,
+ FJES_CMD_STATUS_TIMEOUT,
+ FJES_CMD_STATUS_ERROR_PARAM,
+ FJES_CMD_STATUS_ERROR_STATUS,
+};
+
+/* EP buffer information */
+union ep_buffer_info {
+ u8 raw[EP_BUFFER_INFO_SIZE];
+
+ struct _ep_buffer_info_common_t {
+ u32 version;
+ } common;
+
+ struct _ep_buffer_info_v1_t {
+ u32 version;
+ u32 info_size;
+
+ u32 buffer_size;
+ u16 count_max;
+
+ u16 _rsv_1;
+
+ u32 frame_max;
+ u8 mac_addr[ETH_ALEN];
+
+ u16 _rsv_2;
+ u32 _rsv_3;
+
+ u16 tx_status;
+ u16 rx_status;
+
+ u32 head;
+ u32 tail;
+
+ u16 vlan_id[EP_BUFFER_SUPPORT_VLAN_MAX];
+
+ } v1i;
+
+};
+
+/* buffer pair for Extended Partition */
+struct ep_share_mem_info {
+ struct epbuf_handler {
+ void *buffer;
+ size_t size;
+ union ep_buffer_info *info;
+ u8 *ring;
+ } tx, rx;
+
+ struct rtnl_link_stats64 net_stats;
+
+ u16 tx_status_work;
+
+ u8 es_status;
+ u8 zone;
+};
+
+struct es_device_trace {
+ u32 record_num;
+ u32 current_record;
+ u32 status_flag;
+ u32 _rsv;
+
+ struct {
+ u16 epid;
+ u16 dir_offset;
+ u32 data;
+ u64 tsc;
+ } record[];
+};
+
+struct fjes_hw_info {
+ struct fjes_device_shared_info *share;
+ union fjes_device_command_req *req_buf;
+ u64 req_buf_size;
+ union fjes_device_command_res *res_buf;
+ u64 res_buf_size;
+
+ int *my_epid;
+ int *max_epid;
+
+ struct es_device_trace *trace;
+ u64 trace_size;
+
+ struct mutex lock; /* buffer lock*/
+
+ unsigned long buffer_share_bit;
+ unsigned long buffer_unshare_reserve_bit;
+};
+
+struct fjes_hw {
+ void *back;
+
+ unsigned long txrx_stop_req_bit;
+ unsigned long epstop_req_bit;
+ struct work_struct update_zone_task;
+ struct work_struct epstop_task;
+
+ int my_epid;
+ int max_epid;
+
+ struct ep_share_mem_info *ep_shm_info;
+
+ struct fjes_hw_resource {
+ u64 start;
+ u64 size;
+ int irq;
+ } hw_res;
+
+ u8 *base;
+
+ struct fjes_hw_info hw_info;
+};
+
+int fjes_hw_init(struct fjes_hw *);
+void fjes_hw_exit(struct fjes_hw *);
+int fjes_hw_reset(struct fjes_hw *);
+int fjes_hw_request_info(struct fjes_hw *);
+int fjes_hw_register_buff_addr(struct fjes_hw *, int,
+ struct ep_share_mem_info *);
+int fjes_hw_unregister_buff_addr(struct fjes_hw *, int);
+void fjes_hw_init_command_registers(struct fjes_hw *,
+ struct fjes_device_command_param *);
+void fjes_hw_setup_epbuf(struct epbuf_handler *, u8 *, u32);
+int fjes_hw_raise_interrupt(struct fjes_hw *, int, enum REG_ICTL_MASK);
+void fjes_hw_set_irqmask(struct fjes_hw *, enum REG_ICTL_MASK, bool);
+u32 fjes_hw_capture_interrupt_status(struct fjes_hw *);
+void fjes_hw_raise_epstop(struct fjes_hw *);
+int fjes_hw_wait_epstop(struct fjes_hw *);
+enum ep_partner_status
+ fjes_hw_get_partner_ep_status(struct fjes_hw *, int);
+
+bool fjes_hw_epid_is_same_zone(struct fjes_hw *, int);
+int fjes_hw_epid_is_shared(struct fjes_device_shared_info *, int);
+bool fjes_hw_check_epbuf_version(struct epbuf_handler *, u32);
+bool fjes_hw_check_mtu(struct epbuf_handler *, u32);
+bool fjes_hw_check_vlan_id(struct epbuf_handler *, u16);
+bool fjes_hw_set_vlan_id(struct epbuf_handler *, u16);
+void fjes_hw_del_vlan_id(struct epbuf_handler *, u16);
+bool fjes_hw_epbuf_rx_is_empty(struct epbuf_handler *);
+void *fjes_hw_epbuf_rx_curpkt_get_addr(struct epbuf_handler *, size_t *);
+void fjes_hw_epbuf_rx_curpkt_drop(struct epbuf_handler *);
+int fjes_hw_epbuf_tx_pkt_send(struct epbuf_handler *, void *, size_t);
+
+#endif /* FJES_HW_H_ */
diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
new file mode 100644
index 000000000000..0ddb54fe3d91
--- /dev/null
+++ b/drivers/net/fjes/fjes_main.c
@@ -0,0 +1,1383 @@
+/*
+ * 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 *)&param, 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, &param);
+ }
+}
+
+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);
diff --git a/drivers/net/fjes/fjes_regs.h b/drivers/net/fjes/fjes_regs.h
new file mode 100644
index 000000000000..029c924dc175
--- /dev/null
+++ b/drivers/net/fjes/fjes_regs.h
@@ -0,0 +1,142 @@
+/*
+ * 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".
+ *
+ */
+
+#ifndef FJES_REGS_H_
+#define FJES_REGS_H_
+
+#include <linux/bitops.h>
+
+#define XSCT_DEVICE_REGISTER_SIZE 0x1000
+
+/* register offset */
+/* Information registers */
+#define XSCT_OWNER_EPID 0x0000 /* Owner EPID */
+#define XSCT_MAX_EP 0x0004 /* Maximum EP */
+
+/* Device Control registers */
+#define XSCT_DCTL 0x0010 /* Device Control */
+
+/* Command Control registers */
+#define XSCT_CR 0x0020 /* Command request */
+#define XSCT_CS 0x0024 /* Command status */
+#define XSCT_SHSTSAL 0x0028 /* Share status address Low */
+#define XSCT_SHSTSAH 0x002C /* Share status address High */
+
+#define XSCT_REQBL 0x0034 /* Request Buffer length */
+#define XSCT_REQBAL 0x0038 /* Request Buffer Address Low */
+#define XSCT_REQBAH 0x003C /* Request Buffer Address High */
+
+#define XSCT_RESPBL 0x0044 /* Response Buffer Length */
+#define XSCT_RESPBAL 0x0048 /* Response Buffer Address Low */
+#define XSCT_RESPBAH 0x004C /* Response Buffer Address High */
+
+/* Interrupt Control registers */
+#define XSCT_IS 0x0080 /* Interrupt status */
+#define XSCT_IMS 0x0084 /* Interrupt mask set */
+#define XSCT_IMC 0x0088 /* Interrupt mask clear */
+#define XSCT_IG 0x008C /* Interrupt generator */
+#define XSCT_ICTL 0x0090 /* Interrupt control */
+
+/* register structure */
+/* Information registers */
+union REG_OWNER_EPID {
+ struct {
+ __le32 epid:16;
+ __le32:16;
+ } bits;
+ __le32 reg;
+};
+
+union REG_MAX_EP {
+ struct {
+ __le32 maxep:16;
+ __le32:16;
+ } bits;
+ __le32 reg;
+};
+
+/* Device Control registers */
+union REG_DCTL {
+ struct {
+ __le32 reset:1;
+ __le32 rsv0:15;
+ __le32 rsv1:16;
+ } bits;
+ __le32 reg;
+};
+
+/* Command Control registers */
+union REG_CR {
+ struct {
+ __le32 req_code:16;
+ __le32 err_info:14;
+ __le32 error:1;
+ __le32 req_start:1;
+ } bits;
+ __le32 reg;
+};
+
+union REG_CS {
+ struct {
+ __le32 req_code:16;
+ __le32 rsv0:14;
+ __le32 busy:1;
+ __le32 complete:1;
+ } bits;
+ __le32 reg;
+};
+
+/* Interrupt Control registers */
+union REG_ICTL {
+ struct {
+ __le32 automak:1;
+ __le32 rsv0:31;
+ } bits;
+ __le32 reg;
+};
+
+enum REG_ICTL_MASK {
+ REG_ICTL_MASK_INFO_UPDATE = 1 << 20,
+ REG_ICTL_MASK_DEV_STOP_REQ = 1 << 19,
+ REG_ICTL_MASK_TXRX_STOP_REQ = 1 << 18,
+ REG_ICTL_MASK_TXRX_STOP_DONE = 1 << 17,
+ REG_ICTL_MASK_RX_DATA = 1 << 16,
+ REG_ICTL_MASK_ALL = GENMASK(20, 16),
+};
+
+enum REG_IS_MASK {
+ REG_IS_MASK_IS_ASSERT = 1 << 31,
+ REG_IS_MASK_EPID = GENMASK(15, 0),
+};
+
+struct fjes_hw;
+
+u32 fjes_hw_rd32(struct fjes_hw *hw, u32 reg);
+
+#define wr32(reg, val) \
+do { \
+ u8 *base = hw->base; \
+ writel((val), &base[(reg)]); \
+} while (0)
+
+#define rd32(reg) (fjes_hw_rd32(hw, reg))
+
+#endif /* FJES_REGS_H_ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 03:01:31 +0100