static void lcs_start_kernel_thread(struct lcs_card *card);
static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *);
static int lcs_send_delipm(struct lcs_card *, struct lcs_ipm_list *);
+static int lcs_recovery(void *ptr);
/**
* Debug Facility Stuff
card->tx_buffer = NULL;
card->tx_emitted = 0;
- /* Initialize kernel thread task used for LGW commands. */
- INIT_WORK(&card->kernel_thread_starter,
- (void *)lcs_start_kernel_thread,card);
- card->thread_start_mask = 0;
- card->thread_allowed_mask = 0;
- card->thread_running_mask = 0;
init_waitqueue_head(&card->wait_q);
spin_lock_init(&card->lock);
spin_lock_init(&card->ipm_lock);
int index, rc;
LCS_DBF_TEXT(5, trace, "rdybuff");
- BUG_ON(buffer->state != BUF_STATE_LOCKED &&
- buffer->state != BUF_STATE_PROCESSED);
+ if (buffer->state != BUF_STATE_LOCKED &&
+ buffer->state != BUF_STATE_PROCESSED)
+ BUG();
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
buffer->state = BUF_STATE_READY;
index = buffer - channel->iob;
int index, prev, next;
LCS_DBF_TEXT(5, trace, "prcsbuff");
- BUG_ON(buffer->state != BUF_STATE_READY);
+ if (buffer->state != BUF_STATE_READY)
+ BUG();
buffer->state = BUF_STATE_PROCESSED;
index = buffer - channel->iob;
prev = (index - 1) & (LCS_NUM_BUFFS - 1);
unsigned long flags;
LCS_DBF_TEXT(5, trace, "relbuff");
- BUG_ON(buffer->state != BUF_STATE_LOCKED &&
- buffer->state != BUF_STATE_PROCESSED);
+ if (buffer->state != BUF_STATE_LOCKED &&
+ buffer->state != BUF_STATE_PROCESSED)
+ BUG();
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
buffer->state = BUF_STATE_EMPTY;
spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
list_add_tail(&ipm->list, &card->ipm_list);
}
spin_unlock_irqrestore(&card->ipm_lock, flags);
- if (card->state == DEV_STATE_UP)
- netif_wake_queue(card->dev);
}
/**
if (ipm != NULL)
continue; /* Address already in list. */
ipm = (struct lcs_ipm_list *)
- kmalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC);
+ kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC);
if (ipm == NULL) {
PRINT_INFO("Not enough memory to add "
"new multicast entry!\n");
break;
}
- memset(ipm, 0, sizeof(struct lcs_ipm_list));
memcpy(&ipm->ipm.mac_addr, buf, LCS_MAC_LENGTH);
ipm->ipm.ip_addr = im4->multiaddr;
ipm->ipm_state = LCS_IPM_STATE_SET_REQUIRED;
spin_lock_irqsave(&card->ipm_lock, flags);
+ LCS_DBF_HEX(2,trace,&ipm->ipm.ip_addr,4);
list_add(&ipm->list, &card->ipm_list);
spin_unlock_irqrestore(&card->ipm_lock, flags);
}
read_unlock(&in4_dev->mc_list_lock);
in_dev_put(in4_dev);
+ netif_carrier_off(card->dev);
+ netif_tx_disable(card->dev);
+ wait_event(card->write.wait_q,
+ (card->write.state != CH_STATE_RUNNING));
lcs_fix_multicast_list(card);
+ if (card->state == DEV_STATE_UP) {
+ netif_carrier_on(card->dev);
+ netif_wake_queue(card->dev);
+ }
out:
lcs_clear_thread_running_bit(card, LCS_SET_MC_THREAD);
return 0;
return PTR_ERR(irb);
}
+static int
+lcs_get_problem(struct ccw_device *cdev, struct irb *irb)
+{
+ int dstat, cstat;
+ char *sense;
+
+ sense = (char *) irb->ecw;
+ cstat = irb->scsw.cstat;
+ dstat = irb->scsw.dstat;
+
+ if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
+ SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
+ SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
+ LCS_DBF_TEXT(2, trace, "CGENCHK");
+ return 1;
+ }
+ if (dstat & DEV_STAT_UNIT_CHECK) {
+ if (sense[LCS_SENSE_BYTE_1] &
+ LCS_SENSE_RESETTING_EVENT) {
+ LCS_DBF_TEXT(2, trace, "REVIND");
+ return 1;
+ }
+ if (sense[LCS_SENSE_BYTE_0] &
+ LCS_SENSE_CMD_REJECT) {
+ LCS_DBF_TEXT(2, trace, "CMDREJ");
+ return 0;
+ }
+ if ((!sense[LCS_SENSE_BYTE_0]) &&
+ (!sense[LCS_SENSE_BYTE_1]) &&
+ (!sense[LCS_SENSE_BYTE_2]) &&
+ (!sense[LCS_SENSE_BYTE_3])) {
+ LCS_DBF_TEXT(2, trace, "ZEROSEN");
+ return 0;
+ }
+ LCS_DBF_TEXT(2, trace, "DGENCHK");
+ return 1;
+ }
+ return 0;
+}
+
+void
+lcs_schedule_recovery(struct lcs_card *card)
+{
+ LCS_DBF_TEXT(2, trace, "startrec");
+ if (!lcs_set_thread_start_bit(card, LCS_RECOVERY_THREAD))
+ schedule_work(&card->kernel_thread_starter);
+}
/**
* IRQ Handler for LCS channels
{
struct lcs_card *card;
struct lcs_channel *channel;
- int index;
+ int rc, index;
+ int cstat, dstat;
if (lcs_check_irb_error(cdev, irb))
return;
else
channel = &card->write;
+ cstat = irb->scsw.cstat;
+ dstat = irb->scsw.dstat;
LCS_DBF_TEXT_(5, trace, "Rint%s",cdev->dev.bus_id);
LCS_DBF_TEXT_(5, trace, "%4x%4x",irb->scsw.cstat, irb->scsw.dstat);
LCS_DBF_TEXT_(5, trace, "%4x%4x",irb->scsw.fctl, irb->scsw.actl);
+ /* Check for channel and device errors presented */
+ rc = lcs_get_problem(cdev, irb);
+ if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) {
+ PRINT_WARN("check on device %s, dstat=0x%X, cstat=0x%X \n",
+ cdev->dev.bus_id, dstat, cstat);
+ if (rc) {
+ lcs_schedule_recovery(card);
+ wake_up(&card->wait_q);
+ return;
+ }
+ }
/* How far in the ccw chain have we processed? */
if ((channel->state != CH_STATE_INIT) &&
(irb->scsw.fctl & SCSW_FCTL_START_FUNC)) {
else if (irb->scsw.actl & SCSW_ACTL_SUSPENDED)
/* CCW execution stopped on a suspend bit. */
channel->state = CH_STATE_SUSPENDED;
-
if (irb->scsw.fctl & SCSW_FCTL_HALT_FUNC) {
if (irb->scsw.cc != 0) {
ccw_device_halt(channel->ccwdev, (addr_t) channel);
/* The channel has been stopped by halt_IO. */
channel->state = CH_STATE_HALTED;
}
-
if (irb->scsw.fctl & SCSW_FCTL_CLEAR_FUNC) {
channel->state = CH_STATE_CLEARED;
}
lcs_release_buffer(channel, buffer);
card = (struct lcs_card *)
((char *) channel - offsetof(struct lcs_card, write));
- if (netif_queue_stopped(card->dev))
+ if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev))
netif_wake_queue(card->dev);
spin_lock(&card->lock);
card->tx_emitted--;
card->stats.tx_carrier_errors++;
return 0;
}
+ if (skb->protocol == htons(ETH_P_IPV6)) {
+ dev_kfree_skb(skb);
+ return 0;
+ }
netif_stop_queue(card->dev);
spin_lock(&card->lock);
if (card->tx_buffer != NULL &&
return rc;
}
-/**
- * reset card
- */
-static int
-lcs_resetcard(struct lcs_card *card)
-{
- int retries;
-
- LCS_DBF_TEXT(2, trace, "rescard");
- for (retries = 0; retries < 10; retries++) {
- if (lcs_detect(card) == 0) {
- netif_wake_queue(card->dev);
- card->state = DEV_STATE_UP;
- PRINT_INFO("LCS device %s successfully restarted!\n",
- card->dev->name);
- return 0;
- }
- msleep(3000);
- }
- PRINT_ERR("Error in Reseting LCS card!\n");
- return -EIO;
-}
-
-
/**
* LCS Stop card
*/
return rc;
}
-/**
- * LGW initiated commands
- */
-static int
-lcs_lgw_startlan_thread(void *data)
-{
- struct lcs_card *card;
-
- card = (struct lcs_card *) data;
- daemonize("lgwstpln");
-
- if (!lcs_do_run_thread(card, LCS_STARTLAN_THREAD))
- return 0;
- LCS_DBF_TEXT(4, trace, "lgwstpln");
- if (card->dev)
- netif_stop_queue(card->dev);
- if (lcs_startlan(card) == 0) {
- netif_wake_queue(card->dev);
- card->state = DEV_STATE_UP;
- PRINT_INFO("LCS Startlan for device %s succeeded!\n",
- card->dev->name);
-
- } else
- PRINT_ERR("LCS Startlan for device %s failed!\n",
- card->dev->name);
- lcs_clear_thread_running_bit(card, LCS_STARTLAN_THREAD);
- return 0;
-}
-
-/**
- * Send startup command initiated by Lan Gateway
- */
-static int
-lcs_lgw_startup_thread(void *data)
-{
- int rc;
-
- struct lcs_card *card;
-
- card = (struct lcs_card *) data;
- daemonize("lgwstaln");
-
- if (!lcs_do_run_thread(card, LCS_STARTUP_THREAD))
- return 0;
- LCS_DBF_TEXT(4, trace, "lgwstaln");
- if (card->dev)
- netif_stop_queue(card->dev);
- rc = lcs_send_startup(card, LCS_INITIATOR_LGW);
- if (rc != 0) {
- PRINT_ERR("Startup for LCS device %s initiated " \
- "by LGW failed!\nReseting card ...\n",
- card->dev->name);
- /* do a card reset */
- rc = lcs_resetcard(card);
- if (rc == 0)
- goto Done;
- }
- rc = lcs_startlan(card);
- if (rc == 0) {
- netif_wake_queue(card->dev);
- card->state = DEV_STATE_UP;
- }
-Done:
- if (rc == 0)
- PRINT_INFO("LCS Startup for device %s succeeded!\n",
- card->dev->name);
- else
- PRINT_ERR("LCS Startup for device %s failed!\n",
- card->dev->name);
- lcs_clear_thread_running_bit(card, LCS_STARTUP_THREAD);
- return 0;
-}
-
-
-/**
- * send stoplan command initiated by Lan Gateway
- */
-static int
-lcs_lgw_stoplan_thread(void *data)
-{
- struct lcs_card *card;
- int rc;
-
- card = (struct lcs_card *) data;
- daemonize("lgwstop");
-
- if (!lcs_do_run_thread(card, LCS_STOPLAN_THREAD))
- return 0;
- LCS_DBF_TEXT(4, trace, "lgwstop");
- if (card->dev)
- netif_stop_queue(card->dev);
- if (lcs_send_stoplan(card, LCS_INITIATOR_LGW) == 0)
- PRINT_INFO("Stoplan for %s initiated by LGW succeeded!\n",
- card->dev->name);
- else
- PRINT_ERR("Stoplan %s initiated by LGW failed!\n",
- card->dev->name);
- /*Try to reset the card, stop it on failure */
- rc = lcs_resetcard(card);
- if (rc != 0)
- rc = lcs_stopcard(card);
- lcs_clear_thread_running_bit(card, LCS_STOPLAN_THREAD);
- return rc;
-}
-
/**
* Kernel Thread helper functions for LGW initiated commands
*/
lcs_start_kernel_thread(struct lcs_card *card)
{
LCS_DBF_TEXT(5, trace, "krnthrd");
- if (lcs_do_start_thread(card, LCS_STARTUP_THREAD))
- kernel_thread(lcs_lgw_startup_thread, (void *) card, SIGCHLD);
- if (lcs_do_start_thread(card, LCS_STARTLAN_THREAD))
- kernel_thread(lcs_lgw_startlan_thread, (void *) card, SIGCHLD);
- if (lcs_do_start_thread(card, LCS_STOPLAN_THREAD))
- kernel_thread(lcs_lgw_stoplan_thread, (void *) card, SIGCHLD);
+ if (lcs_do_start_thread(card, LCS_RECOVERY_THREAD))
+ kernel_thread(lcs_recovery, (void *) card, SIGCHLD);
#ifdef CONFIG_IP_MULTICAST
if (lcs_do_start_thread(card, LCS_SET_MC_THREAD))
- kernel_thread(lcs_register_mc_addresses, (void *) card, SIGCHLD);
+ kernel_thread(lcs_register_mc_addresses,
+ (void *) card, SIGCHLD);
#endif
}
if (cmd->initiator == LCS_INITIATOR_LGW) {
switch(cmd->cmd_code) {
case LCS_CMD_STARTUP:
- if (!lcs_set_thread_start_bit(card,
- LCS_STARTUP_THREAD))
- schedule_work(&card->kernel_thread_starter);
- break;
case LCS_CMD_STARTLAN:
- if (!lcs_set_thread_start_bit(card,
- LCS_STARTLAN_THREAD))
- schedule_work(&card->kernel_thread_starter);
+ lcs_schedule_recovery(card);
break;
case LCS_CMD_STOPLAN:
- if (!lcs_set_thread_start_bit(card,
- LCS_STOPLAN_THREAD))
- schedule_work(&card->kernel_thread_starter);
+ PRINT_WARN("Stoplan for %s initiated by LGW.\n",
+ card->dev->name);
+ if (card->dev)
+ netif_carrier_off(card->dev);
break;
default:
PRINT_INFO("UNRECOGNIZED LGW COMMAND\n");
LCS_DBF_TEXT(2, trace, "stopdev");
card = (struct lcs_card *) dev->priv;
- netif_stop_queue(dev);
+ netif_carrier_off(dev);
+ netif_tx_disable(dev);
dev->flags &= ~IFF_UP;
+ wait_event(card->write.wait_q,
+ (card->write.state != CH_STATE_RUNNING));
rc = lcs_stopcard(card);
if (rc)
PRINT_ERR("Try it again!\n ");
} else {
dev->flags |= IFF_UP;
+ netif_carrier_on(dev);
netif_wake_queue(dev);
card->state = DEV_STATE_UP;
}
DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store);
+static ssize_t
+lcs_dev_recover_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct lcs_card *card = dev->driver_data;
+ char *tmp;
+ int i;
+
+ if (!card)
+ return -EINVAL;
+ if (card->state != DEV_STATE_UP)
+ return -EPERM;
+ i = simple_strtoul(buf, &tmp, 16);
+ if (i == 1)
+ lcs_schedule_recovery(card);
+ return count;
+}
+
+static DEVICE_ATTR(recover, 0200, NULL, lcs_dev_recover_store);
+
static struct attribute * lcs_attrs[] = {
&dev_attr_portno.attr,
&dev_attr_type.attr,
&dev_attr_lancmd_timeout.attr,
+ &dev_attr_recover.attr,
NULL,
};
ccwgdev->dev.driver_data = card;
ccwgdev->cdev[0]->handler = lcs_irq;
ccwgdev->cdev[1]->handler = lcs_irq;
+ card->gdev = ccwgdev;
+ INIT_WORK(&card->kernel_thread_starter,
+ (void *) lcs_start_kernel_thread, card);
+ card->thread_start_mask = 0;
+ card->thread_allowed_mask = 0;
+ card->thread_running_mask = 0;
return 0;
}
if (recover_state == DEV_STATE_RECOVER) {
lcs_set_multicast_list(card->dev);
card->dev->flags |= IFF_UP;
+ netif_carrier_on(card->dev);
netif_wake_queue(card->dev);
card->state = DEV_STATE_UP;
} else {
* lcs_shutdown_device, called when setting the group device offline.
*/
static int
-lcs_shutdown_device(struct ccwgroup_device *ccwgdev)
+__lcs_shutdown_device(struct ccwgroup_device *ccwgdev, int recovery_mode)
{
struct lcs_card *card;
enum lcs_dev_states recover_state;
card = (struct lcs_card *)ccwgdev->dev.driver_data;
if (!card)
return -ENODEV;
- lcs_set_allowed_threads(card, 0);
- if (lcs_wait_for_threads(card, LCS_SET_MC_THREAD))
- return -ERESTARTSYS;
+ if (recovery_mode == 0) {
+ lcs_set_allowed_threads(card, 0);
+ if (lcs_wait_for_threads(card, LCS_SET_MC_THREAD))
+ return -ERESTARTSYS;
+ }
LCS_DBF_HEX(3, setup, &card, sizeof(void*));
recover_state = card->state;
return 0;
}
+static int
+lcs_shutdown_device(struct ccwgroup_device *ccwgdev)
+{
+ return __lcs_shutdown_device(ccwgdev, 0);
+}
+
+/**
+ * drive lcs recovery after startup and startlan initiated by Lan Gateway
+ */
+static int
+lcs_recovery(void *ptr)
+{
+ struct lcs_card *card;
+ struct ccwgroup_device *gdev;
+ int rc;
+
+ card = (struct lcs_card *) ptr;
+ daemonize("lcs_recover");
+
+ LCS_DBF_TEXT(4, trace, "recover1");
+ if (!lcs_do_run_thread(card, LCS_RECOVERY_THREAD))
+ return 0;
+ LCS_DBF_TEXT(4, trace, "recover2");
+ gdev = card->gdev;
+ PRINT_WARN("Recovery of device %s started...\n", gdev->dev.bus_id);
+ rc = __lcs_shutdown_device(gdev, 1);
+ rc = lcs_new_device(gdev);
+ if (!rc)
+ PRINT_INFO("Device %s successfully recovered!\n",
+ card->dev->name);
+ else
+ PRINT_INFO("Device %s could not be recovered!\n",
+ card->dev->name);
+ lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD);
+ return 0;
+}
+
/**
* lcs_remove_device, free buffers and card
*/
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff