fjes_main.c 37.2 KB
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/*
 *  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>
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#include <linux/netdevice.h>
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#include <linux/interrupt.h>
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#include "fjes.h"

#define MAJ 1
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#define MIN 1
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#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);

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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 *);
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static netdev_tx_t fjes_xmit_frame(struct sk_buff *, struct net_device *);
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static void fjes_raise_intr_rxdata_task(struct work_struct *);
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static void fjes_tx_stall_task(struct work_struct *);
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static void fjes_force_close_task(struct work_struct *);
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static irqreturn_t fjes_intr(int, void*);
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static struct rtnl_link_stats64 *
fjes_get_stats64(struct net_device *, struct rtnl_link_stats64 *);
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static int fjes_change_mtu(struct net_device *, int);
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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);
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static void fjes_tx_retry(struct net_device *);
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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 *);

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static int fjes_sw_init(struct fjes_adapter *);
static void fjes_netdev_setup(struct net_device *);
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static void fjes_irq_watch_task(struct work_struct *);
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static void fjes_watch_unshare_task(struct work_struct *);
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static void fjes_rx_irq(struct fjes_adapter *, int);
static int fjes_poll(struct napi_struct *, int);

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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,
	},
	.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;
}

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static int fjes_request_irq(struct fjes_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	int result = -1;

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	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);
	}

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	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;

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	adapter->interrupt_watch_enable = false;
	cancel_delayed_work_sync(&adapter->interrupt_watch_task);

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	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;
	}
}

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static const struct net_device_ops fjes_netdev_ops = {
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	.ndo_open		= fjes_open,
	.ndo_stop		= fjes_close,
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	.ndo_start_xmit		= fjes_xmit_frame,
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	.ndo_get_stats64	= fjes_get_stats64,
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	.ndo_change_mtu		= fjes_change_mtu,
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	.ndo_tx_timeout		= fjes_tx_retry,
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	.ndo_vlan_rx_add_vid	= fjes_vlan_rx_add_vid,
	.ndo_vlan_rx_kill_vid = fjes_vlan_rx_kill_vid,
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};

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/* 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;

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	napi_enable(&adapter->napi);

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	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);
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	napi_disable(&adapter->napi);
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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;
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	unsigned long flags;
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	int epidx;

	netif_tx_stop_all_queues(netdev);
	netif_carrier_off(netdev);

	fjes_hw_raise_epstop(hw);

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	napi_disable(&adapter->napi);

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	spin_lock_irqsave(&hw->rx_status_lock, flags);
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	for (epidx = 0; epidx < hw->max_epid; epidx++) {
		if (epidx == hw->my_epid)
			continue;

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		if (fjes_hw_get_partner_ep_status(hw, epidx) ==
		    EP_PARTNER_SHARED)
			adapter->hw.ep_shm_info[epidx]
				   .tx.info->v1i.rx_status &=
				~FJES_RX_POLL_WORK;
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	}
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	spin_unlock_irqrestore(&hw->rx_status_lock, flags);
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	fjes_free_irq(adapter);

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	cancel_delayed_work_sync(&adapter->interrupt_watch_task);
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	cancel_work_sync(&adapter->unshare_watch_task);
	adapter->unshare_watch_bitmask = 0;
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	cancel_work_sync(&adapter->raise_intr_rxdata_task);
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	cancel_work_sync(&adapter->tx_stall_task);
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	cancel_work_sync(&hw->update_zone_task);
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	cancel_work_sync(&hw->epstop_task);
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	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;
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	unsigned long flags;
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	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);
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			hw->ep_shm_info[epidx].ep_stats
				.send_intr_zoneupdate += 1;
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		}
	}

	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];

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		spin_lock_irqsave(&hw->rx_status_lock, flags);
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		fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr,
				    netdev->mtu);
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		spin_unlock_irqrestore(&hw->rx_status_lock, flags);
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		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;
			}
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			hw->ep_shm_info[epidx].ep_stats
				.com_regist_buf_exec += 1;
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		}
	}

	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;
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	unsigned long flags;
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	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);

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		hw->ep_shm_info[epidx].ep_stats.com_unregist_buf_exec += 1;

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		if (result)
			reset_flag = true;

		buf_pair = &hw->ep_shm_info[epidx];

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		spin_lock_irqsave(&hw->rx_status_lock, flags);
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		fjes_hw_setup_epbuf(&buf_pair->tx,
				    netdev->dev_addr, netdev->mtu);
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		spin_unlock_irqrestore(&hw->rx_status_lock, flags);
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		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);
	}
}

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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 -
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		dev_trans_start(netdev)) > FJES_TX_TX_STALL_TIMEOUT) {
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		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;

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			if (!(info->v1i.rx_status & FJES_RX_MTU_CHANGING_DONE))
				return;

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			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);
}

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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();
}

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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) &&
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		    !(hw->ep_shm_info[epid].rx.info->v1i.rx_status &
		      FJES_RX_POLL_WORK)) {
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			fjes_hw_raise_interrupt(hw, epid,
						REG_ICTL_MASK_RX_DATA);
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			hw->ep_shm_info[epid].ep_stats.send_intr_rx += 1;
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		}
	}

	usleep_range(500, 1000);
}

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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;
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	if (!work_pending(&adapter->raise_intr_rxdata_task))
		queue_work(adapter->txrx_wq,
			   &adapter->raise_intr_rxdata_task);
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	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) {
674 675 676
			if (!is_multi)
				hw->ep_shm_info[dest_epid].ep_stats
					.tx_dropped_not_shared += 1;
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			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;
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			hw->ep_shm_info[dest_epid].net_stats
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						.tx_carrier_errors += 1;
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			hw->ep_shm_info[dest_epid].ep_stats
					.tx_dropped_ver_mismatch += 1;
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			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;
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			hw->ep_shm_info[dest_epid].net_stats.tx_dropped += 1;
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			adapter->stats64.tx_errors += 1;
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			hw->ep_shm_info[dest_epid].net_stats.tx_errors += 1;
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			hw->ep_shm_info[dest_epid].ep_stats
					.tx_dropped_buf_size_mismatch += 1;
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			ret = NETDEV_TX_OK;
		} else if (vlan &&
			   !fjes_hw_check_vlan_id(
				&adapter->hw.ep_shm_info[dest_epid].rx,
				vlan_id)) {
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			hw->ep_shm_info[dest_epid].ep_stats
				.tx_dropped_vlanid_mismatch += 1;
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			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;
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					hw->ep_shm_info[dest_epid].net_stats
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								.tx_fifo_errors += 1;
					adapter->stats64.tx_errors += 1;
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					hw->ep_shm_info[dest_epid].net_stats
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								.tx_errors += 1;

					ret = NETDEV_TX_OK;
				} else {
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					netif_trans_update(netdev);
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					hw->ep_shm_info[dest_epid].ep_stats
						.tx_buffer_full += 1;
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					netif_tx_stop_queue(cur_queue);

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					if (!work_pending(&adapter->tx_stall_task))
						queue_work(adapter->txrx_wq,
							   &adapter->tx_stall_task);

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					ret = NETDEV_TX_BUSY;
				}
			} else {
				if (!is_multi) {
					adapter->stats64.tx_packets += 1;
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					hw->ep_shm_info[dest_epid].net_stats
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								.tx_packets += 1;
					adapter->stats64.tx_bytes += len;
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					hw->ep_shm_info[dest_epid].net_stats
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								.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;
}

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static void fjes_tx_retry(struct net_device *netdev)
{
	struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0);

	netif_tx_wake_queue(queue);
}

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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;
}

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static int fjes_change_mtu(struct net_device *netdev, int new_mtu)
{
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	struct fjes_adapter *adapter = netdev_priv(netdev);
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	bool running = netif_running(netdev);
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	struct fjes_hw *hw = &adapter->hw;
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	unsigned long flags;
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	int ret = -EINVAL;
	int idx, epidx;
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	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;

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			ret = 0;
			break;
		}
	}

	if (ret)
		return ret;
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	if (running) {
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		spin_lock_irqsave(&hw->rx_status_lock, flags);
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		for (epidx = 0; epidx < hw->max_epid; epidx++) {
			if (epidx == hw->my_epid)
				continue;
			hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
				~FJES_RX_MTU_CHANGING_DONE;
		}
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		spin_unlock_irqrestore(&hw->rx_status_lock, flags);

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		netif_tx_stop_all_queues(netdev);
		netif_carrier_off(netdev);
		cancel_work_sync(&adapter->tx_stall_task);
		napi_disable(&adapter->napi);
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		msleep(1000);
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		netif_tx_stop_all_queues(netdev);
	}

	netdev->mtu = new_mtu;

	if (running) {
		for (epidx = 0; epidx < hw->max_epid; epidx++) {
			if (epidx == hw->my_epid)
				continue;

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			spin_lock_irqsave(&hw->rx_status_lock, flags);
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			fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
					    netdev->dev_addr,
					    netdev->mtu);

			hw->ep_shm_info[epidx].tx.info->v1i.rx_status |=
				FJES_RX_MTU_CHANGING_DONE;
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			spin_unlock_irqrestore(&hw->rx_status_lock, flags);
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		}
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		netif_tx_wake_all_queues(netdev);
		netif_carrier_on(netdev);
		napi_enable(&adapter->napi);
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		napi_schedule(&adapter->napi);
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	}

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	return ret;
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}

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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;
}

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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;
904
	unsigned long flags;
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	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) {
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			spin_lock_irqsave(&hw->rx_status_lock, flags);
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			hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
				FJES_RX_STOP_REQ_DONE;
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			spin_unlock_irqrestore(&hw->rx_status_lock, flags);
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			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;
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	unsigned long flags;
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	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:
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		spin_lock_irqsave(&hw->rx_status_lock, flags);
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		hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
				FJES_RX_STOP_REQ_DONE;
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		spin_unlock_irqrestore(&hw->rx_status_lock, flags);
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		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;
	}
}

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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);
}

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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);

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	if (icr & REG_IS_MASK_IS_ASSERT) {
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		if (icr & REG_ICTL_MASK_RX_DATA) {
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			fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID);
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			hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
				.recv_intr_rx += 1;
		}
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		if (icr & REG_ICTL_MASK_DEV_STOP_REQ) {
999
			fjes_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
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			hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
				.recv_intr_stop += 1;
		}
1003

1004
		if (icr & REG_ICTL_MASK_TXRX_STOP_REQ) {
1005
			fjes_txrx_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
1006 1007 1008
			hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
				.recv_intr_unshare += 1;
		}
1009 1010 1011 1012 1013

		if (icr & REG_ICTL_MASK_TXRX_STOP_DONE)
			fjes_hw_set_irqmask(hw,
					    REG_ICTL_MASK_TXRX_STOP_DONE, true);

1014
		if (icr & REG_ICTL_MASK_INFO_UPDATE) {
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			fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID);
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			hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
				.recv_intr_zoneupdate += 1;
		}
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		ret = IRQ_HANDLED;
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	} else {
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		ret = IRQ_NONE;
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	}
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	return ret;
}

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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;

1098
	spin_lock(&hw->rx_status_lock);
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	for (epidx = 0; epidx < hw->max_epid; epidx++) {
		if (epidx == hw->my_epid)
			continue;

1103 1104 1105 1106
		if (fjes_hw_get_partner_ep_status(hw, epidx) ==
		    EP_PARTNER_SHARED)
			adapter->hw.ep_shm_info[epidx]
				   .tx.info->v1i.rx_status |= FJES_RX_POLL_WORK;
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	}
1108
	spin_unlock(&hw->rx_status_lock);
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	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 {
1166
			spin_lock(&hw->rx_status_lock);
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			for (epidx = 0; epidx < hw->max_epid; epidx++) {
				if (epidx == hw->my_epid)
					continue;
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				if (fjes_hw_get_partner_ep_status(hw, epidx) ==
				    EP_PARTNER_SHARED)
					adapter->hw.ep_shm_info[epidx].tx
						   .info->v1i.rx_status &=
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						~FJES_RX_POLL_WORK;
			}
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			spin_unlock(&hw->rx_status_lock);
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			fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, false);
		}
	}

	return work_done;
}

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/* fjes_probe - Device Initialization Routine */
static int fjes_probe(struct platform_device *plat_dev)
{
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	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;

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	INIT_WORK(&adapter->force_close_task, fjes_force_close_task);
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	adapter->force_reset = false;
	adapter->open_guard = false;

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	adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
	adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
					      WQ_MEM_RECLAIM, 0);
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	INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
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	INIT_WORK(&adapter->raise_intr_rxdata_task,
		  fjes_raise_intr_rxdata_task);
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	INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task);
	adapter->unshare_watch_bitmask = 0;
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	INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task);
	adapter->interrupt_watch_enable = false;

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	res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
	hw->hw_res.start = res->start;
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	hw->hw_res.size = resource_size(res);
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	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);

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	return 0;
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err_hw_exit:
	fjes_hw_exit(&adapter->hw);
err_free_netdev:
	free_netdev(netdev);
err_out:
	return err;
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}

/* fjes_remove - Device Removal Routine */
static int fjes_remove(struct platform_device *plat_dev)
{
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	struct net_device *netdev = dev_get_drvdata(&plat_dev->dev);
	struct fjes_adapter *adapter = netdev_priv(netdev);
	struct fjes_hw *hw = &adapter->hw;

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	cancel_delayed_work_sync(&adapter->interrupt_watch_task);
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	cancel_work_sync(&adapter->unshare_watch_task);
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	cancel_work_sync(&adapter->raise_intr_rxdata_task);
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	cancel_work_sync(&adapter->tx_stall_task);
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	if (adapter->control_wq)
		destroy_workqueue(adapter->control_wq);
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	if (adapter->txrx_wq)
		destroy_workqueue(adapter->txrx_wq);

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	unregister_netdev(netdev);

	fjes_hw_exit(hw);

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	netif_napi_del(&adapter->napi);

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	free_netdev(netdev);

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	return 0;
}

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static int fjes_sw_init(struct fjes_adapter *adapter)
{
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	struct net_device *netdev = adapter->netdev;

	netif_napi_add(netdev, &adapter->napi, fjes_poll, 64);

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	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;
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	fjes_set_ethtool_ops(netdev);
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	netdev->mtu = fjes_support_mtu[3];
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	netdev->flags |= IFF_BROADCAST;
	netdev->features |= NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_FILTER;
}

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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);
	}
}

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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;
1346
	unsigned long flags;
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	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);
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			hw->ep_shm_info[epidx].ep_stats
					.com_unregist_buf_exec += 1;
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1401
			spin_lock_irqsave(&hw->rx_status_lock, flags);
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			fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
					    netdev->dev_addr, netdev->mtu);
1404
			spin_unlock_irqrestore(&hw->rx_status_lock, flags);
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			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);

1442 1443 1444
				hw->ep_shm_info[epidx].ep_stats
					.com_unregist_buf_exec += 1;

1445
				spin_lock_irqsave(&hw->rx_status_lock, flags);
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				fjes_hw_setup_epbuf(
					&hw->ep_shm_info[epidx].tx,
					netdev->dev_addr, netdev->mtu);
1449 1450
				spin_unlock_irqrestore(&hw->rx_status_lock,
						       flags);
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				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)) {
1458
				spin_lock_irqsave(&hw->rx_status_lock, flags);
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				hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
						~FJES_RX_STOP_REQ_DONE;
1461 1462
				spin_unlock_irqrestore(&hw->rx_status_lock,
						       flags);
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			}
		}
	}
}

1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500
/* 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);