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OpenCloudOS-Kernel/drivers/net/fjes/fjes_main.c

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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>
#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);
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