fjes: net_device_ops.ndo_open and .ndo_stop

This patch adds net_device_ops.ndo_open and .ndo_stop
callback. These function is called when network device
activation and deactivation.

Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Taku Izumi 2015-08-21 17:29:23 +09:00 committed by David S. Miller
parent 7950e6c5da
commit e5d486dcaa
5 changed files with 439 additions and 0 deletions

View File

@ -29,6 +29,7 @@
#define FJES_ACPI_SYMBOL "Extended Socket"
#define FJES_MAX_QUEUES 1
#define FJES_TX_RETRY_INTERVAL (20 * HZ)
#define FJES_OPEN_ZONE_UPDATE_WAIT (300) /* msec */
/* board specific private data structure */
struct fjes_adapter {

View File

@ -638,6 +638,25 @@ int fjes_hw_unregister_buff_addr(struct fjes_hw *hw, int dest_epid)
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)
{
@ -646,3 +665,129 @@ void fjes_hw_set_irqmask(struct fjes_hw *hw,
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;
}

View File

@ -36,6 +36,7 @@ struct fjes_hw;
#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)
@ -43,6 +44,17 @@ struct fjes_hw;
#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_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)
@ -77,6 +89,15 @@ struct esmem_frame {
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;
@ -278,6 +299,15 @@ 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);
#endif /* FJES_HW_H_ */

View File

@ -24,6 +24,7 @@
#include <linux/nls.h>
#include <linux/platform_device.h>
#include <linux/netdevice.h>
#include <linux/interrupt.h>
#include "fjes.h"
@ -43,6 +44,15 @@ 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 irqreturn_t fjes_intr(int, void*);
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*);
@ -170,9 +180,245 @@ fjes_get_acpi_resource(struct acpi_resource *acpi_res, void *data)
return AE_OK;
}
static int fjes_request_irq(struct fjes_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
int result = -1;
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;
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,
};
/* 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;
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);
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);
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);
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 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)
ret = IRQ_HANDLED;
else
ret = IRQ_NONE;
return ret;
}
/* fjes_probe - Device Initialization Routine */
static int fjes_probe(struct platform_device *plat_dev)
{

View File

@ -49,8 +49,11 @@
#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 */
@ -101,6 +104,15 @@ union REG_CS {
__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,
@ -110,6 +122,11 @@ enum REG_ICTL_MASK {
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);