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path: root/drivers/s390/net/lcs.c
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Diffstat (limited to 'drivers/s390/net/lcs.c')
-rw-r--r--drivers/s390/net/lcs.c970
1 files changed, 558 insertions, 412 deletions
diff --git a/drivers/s390/net/lcs.c b/drivers/s390/net/lcs.c
index da8c515743e..0a7d87c372b 100644
--- a/drivers/s390/net/lcs.c
+++ b/drivers/s390/net/lcs.c
@@ -1,17 +1,12 @@
/*
- * linux/drivers/s390/net/lcs.c
- *
* Linux for S/390 Lan Channel Station Network Driver
*
- * Copyright (C) 1999-2001 IBM Deutschland Entwicklung GmbH,
- * IBM Corporation
- * Author(s): Original Code written by
- * DJ Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
- * Rewritten by
- * Frank Pavlic (fpavlic@de.ibm.com) and
- * Martin Schwidefsky <schwidefsky@de.ibm.com>
- *
- * $Revision: 1.99 $ $Date: 2005/05/11 08:10:17 $
+ * Copyright IBM Corp. 1999, 2009
+ * Author(s): Original Code written by
+ * DJ Barrow <djbarrow@de.ibm.com,barrow_dj@yahoo.com>
+ * Rewritten by
+ * Frank Pavlic <fpavlic@de.ibm.com> and
+ * Martin Schwidefsky <schwidefsky@de.ibm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -28,16 +23,20 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#define KMSG_COMPONENT "lcs"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
#include <linux/module.h>
#include <linux/if.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
-#include <linux/trdevice.h>
#include <linux/fddidevice.h>
#include <linux/inetdevice.h>
#include <linux/in.h>
#include <linux/igmp.h>
#include <linux/delay.h>
+#include <linux/kthread.h>
+#include <linux/slab.h>
#include <net/arp.h>
#include <net/ip.h>
@@ -48,33 +47,38 @@
#include <asm/ccwgroup.h>
#include "lcs.h"
-#include "cu3088.h"
-#if !defined(CONFIG_NET_ETHERNET) && \
- !defined(CONFIG_TR) && !defined(CONFIG_FDDI)
+#if !defined(CONFIG_ETHERNET) && !defined(CONFIG_FDDI)
#error Cannot compile lcs.c without some net devices switched on.
#endif
/**
* initialization string for output
*/
-#define VERSION_LCS_C "$Revision: 1.99 $"
-static char version[] __initdata = "LCS driver ("VERSION_LCS_C "/" VERSION_LCS_H ")";
-static char debug_buffer[255];
+static char version[] __initdata = "LCS driver";
+
+/**
+ * the root device for lcs group devices
+ */
+static struct device *lcs_root_dev;
/**
* Some prototypes.
*/
static void lcs_tasklet(unsigned long);
-static void lcs_start_kernel_thread(struct lcs_card *card);
+static void lcs_start_kernel_thread(struct work_struct *);
static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *);
+#ifdef CONFIG_IP_MULTICAST
static int lcs_send_delipm(struct lcs_card *, struct lcs_ipm_list *);
+#endif /* CONFIG_IP_MULTICAST */
+static int lcs_recovery(void *ptr);
/**
* Debug Facility Stuff
*/
+static char debug_buffer[255];
static debug_info_t *lcs_dbf_setup;
static debug_info_t *lcs_dbf_trace;
@@ -94,16 +98,16 @@ static int
lcs_register_debug_facility(void)
{
lcs_dbf_setup = debug_register("lcs_setup", 2, 1, 8);
- lcs_dbf_trace = debug_register("lcs_trace", 2, 2, 8);
+ lcs_dbf_trace = debug_register("lcs_trace", 4, 1, 8);
if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) {
- PRINT_ERR("Not enough memory for debug facility.\n");
+ pr_err("Not enough memory for debug facility.\n");
lcs_unregister_debug_facility();
return -ENOMEM;
}
debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view);
- debug_set_level(lcs_dbf_setup, 4);
+ debug_set_level(lcs_dbf_setup, 2);
debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view);
- debug_set_level(lcs_dbf_trace, 4);
+ debug_set_level(lcs_dbf_trace, 2);
return 0;
}
@@ -118,12 +122,11 @@ lcs_alloc_channel(struct lcs_channel *channel)
LCS_DBF_TEXT(2, setup, "ichalloc");
for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
/* alloc memory fo iobuffer */
- channel->iob[cnt].data = (void *)
- kmalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL);
+ channel->iob[cnt].data =
+ kzalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL);
if (channel->iob[cnt].data == NULL)
break;
- memset(channel->iob[cnt].data, 0, LCS_IOBUFFERSIZE);
- channel->iob[cnt].state = BUF_STATE_EMPTY;
+ channel->iob[cnt].state = LCS_BUF_STATE_EMPTY;
}
if (cnt < LCS_NUM_BUFFS) {
/* Not all io buffers could be allocated. */
@@ -185,10 +188,9 @@ lcs_alloc_card(void)
LCS_DBF_TEXT(2, setup, "alloclcs");
- card = kmalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA);
+ card = kzalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA);
if (card == NULL)
return NULL;
- memset(card, 0, sizeof(struct lcs_card));
card->lan_type = LCS_FRAME_TYPE_AUTO;
card->pkt_seq = 0;
card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT;
@@ -240,7 +242,7 @@ lcs_setup_read_ccws(struct lcs_card *card)
((struct lcs_header *)
card->read.iob[cnt].data)->offset = LCS_ILLEGAL_OFFSET;
card->read.iob[cnt].callback = lcs_get_frames_cb;
- card->read.iob[cnt].state = BUF_STATE_READY;
+ card->read.iob[cnt].state = LCS_BUF_STATE_READY;
card->read.iob[cnt].count = LCS_IOBUFFERSIZE;
}
card->read.ccws[0].flags &= ~CCW_FLAG_PCI;
@@ -251,7 +253,7 @@ lcs_setup_read_ccws(struct lcs_card *card)
card->read.ccws[LCS_NUM_BUFFS].cda =
(__u32) __pa(card->read.ccws);
/* Setg initial state of the read channel. */
- card->read.state = CH_STATE_INIT;
+ card->read.state = LCS_CH_STATE_INIT;
card->read.io_idx = 0;
card->read.buf_idx = 0;
@@ -280,7 +282,7 @@ lcs_setup_write_ccws(struct lcs_card *card)
LCS_DBF_TEXT(3, setup, "iwritccw");
/* Setup write ccws. */
- memset(card->write.ccws, 0, sizeof(struct ccw1) * LCS_NUM_BUFFS + 1);
+ memset(card->write.ccws, 0, sizeof(struct ccw1) * (LCS_NUM_BUFFS + 1));
for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
card->write.ccws[cnt].cmd_code = LCS_CCW_WRITE;
card->write.ccws[cnt].count = 0;
@@ -298,7 +300,7 @@ lcs_setup_write_ccws(struct lcs_card *card)
card->write.ccws[LCS_NUM_BUFFS].cda =
(__u32) __pa(card->write.ccws);
/* Set initial state of the write channel. */
- card->read.state = CH_STATE_INIT;
+ card->read.state = LCS_CH_STATE_INIT;
card->write.io_idx = 0;
card->write.buf_idx = 0;
@@ -434,12 +436,6 @@ lcs_setup_card(struct lcs_card *card)
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);
@@ -500,17 +496,20 @@ lcs_start_channel(struct lcs_channel *channel)
unsigned long flags;
int rc;
- LCS_DBF_TEXT_(4,trace,"ssch%s", channel->ccwdev->dev.bus_id);
+ LCS_DBF_TEXT_(4, trace,"ssch%s", dev_name(&channel->ccwdev->dev));
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
rc = ccw_device_start(channel->ccwdev,
channel->ccws + channel->io_idx, 0, 0,
DOIO_DENY_PREFETCH | DOIO_ALLOW_SUSPEND);
if (rc == 0)
- channel->state = CH_STATE_RUNNING;
+ channel->state = LCS_CH_STATE_RUNNING;
spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
if (rc) {
- LCS_DBF_TEXT_(4,trace,"essh%s", channel->ccwdev->dev.bus_id);
- PRINT_ERR("Error in starting channel, rc=%d!\n", rc);
+ LCS_DBF_TEXT_(4,trace,"essh%s",
+ dev_name(&channel->ccwdev->dev));
+ dev_err(&channel->ccwdev->dev,
+ "Starting an LCS device resulted in an error,"
+ " rc=%d!\n", rc);
}
return rc;
}
@@ -522,16 +521,17 @@ lcs_clear_channel(struct lcs_channel *channel)
int rc;
LCS_DBF_TEXT(4,trace,"clearch");
- LCS_DBF_TEXT_(4,trace,"%s", channel->ccwdev->dev.bus_id);
+ LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev));
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
rc = ccw_device_clear(channel->ccwdev, (addr_t) channel);
spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
if (rc) {
- LCS_DBF_TEXT_(4,trace,"ecsc%s", channel->ccwdev->dev.bus_id);
+ LCS_DBF_TEXT_(4, trace, "ecsc%s",
+ dev_name(&channel->ccwdev->dev));
return rc;
}
- wait_event(channel->wait_q, (channel->state == CH_STATE_CLEARED));
- channel->state = CH_STATE_STOPPED;
+ wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_CLEARED));
+ channel->state = LCS_CH_STATE_STOPPED;
return rc;
}
@@ -545,20 +545,21 @@ lcs_stop_channel(struct lcs_channel *channel)
unsigned long flags;
int rc;
- if (channel->state == CH_STATE_STOPPED)
+ if (channel->state == LCS_CH_STATE_STOPPED)
return 0;
LCS_DBF_TEXT(4,trace,"haltsch");
- LCS_DBF_TEXT_(4,trace,"%s", channel->ccwdev->dev.bus_id);
- channel->state = CH_STATE_INIT;
+ LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev));
+ channel->state = LCS_CH_STATE_INIT;
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
rc = ccw_device_halt(channel->ccwdev, (addr_t) channel);
spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
if (rc) {
- LCS_DBF_TEXT_(4,trace,"ehsc%s", channel->ccwdev->dev.bus_id);
+ LCS_DBF_TEXT_(4, trace, "ehsc%s",
+ dev_name(&channel->ccwdev->dev));
return rc;
}
/* Asynchronous halt initialted. Wait for its completion. */
- wait_event(channel->wait_q, (channel->state == CH_STATE_HALTED));
+ wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_HALTED));
lcs_clear_channel(channel);
return 0;
}
@@ -606,8 +607,8 @@ __lcs_get_buffer(struct lcs_channel *channel)
LCS_DBF_TEXT(5, trace, "_getbuff");
index = channel->io_idx;
do {
- if (channel->iob[index].state == BUF_STATE_EMPTY) {
- channel->iob[index].state = BUF_STATE_LOCKED;
+ if (channel->iob[index].state == LCS_BUF_STATE_EMPTY) {
+ channel->iob[index].state = LCS_BUF_STATE_LOCKED;
return channel->iob + index;
}
index = (index + 1) & (LCS_NUM_BUFFS - 1);
@@ -636,17 +637,20 @@ __lcs_resume_channel(struct lcs_channel *channel)
{
int rc;
- if (channel->state != CH_STATE_SUSPENDED)
+ if (channel->state != LCS_CH_STATE_SUSPENDED)
return 0;
if (channel->ccws[channel->io_idx].flags & CCW_FLAG_SUSPEND)
return 0;
- LCS_DBF_TEXT_(5, trace, "rsch%s", channel->ccwdev->dev.bus_id);
+ LCS_DBF_TEXT_(5, trace, "rsch%s", dev_name(&channel->ccwdev->dev));
rc = ccw_device_resume(channel->ccwdev);
if (rc) {
- LCS_DBF_TEXT_(4, trace, "ersc%s", channel->ccwdev->dev.bus_id);
- PRINT_ERR("Error in lcs_resume_channel: rc=%d\n",rc);
+ LCS_DBF_TEXT_(4, trace, "ersc%s",
+ dev_name(&channel->ccwdev->dev));
+ dev_err(&channel->ccwdev->dev,
+ "Sending data from the LCS device to the LAN failed"
+ " with rc=%d\n",rc);
} else
- channel->state = CH_STATE_RUNNING;
+ channel->state = LCS_CH_STATE_RUNNING;
return rc;
}
@@ -680,11 +684,10 @@ lcs_ready_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
int index, rc;
LCS_DBF_TEXT(5, trace, "rdybuff");
- if (buffer->state != BUF_STATE_LOCKED &&
- buffer->state != BUF_STATE_PROCESSED)
- BUG();
+ BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED &&
+ buffer->state != LCS_BUF_STATE_PROCESSED);
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
- buffer->state = BUF_STATE_READY;
+ buffer->state = LCS_BUF_STATE_READY;
index = buffer - channel->iob;
/* Set length. */
channel->ccws[index].count = buffer->count;
@@ -706,9 +709,8 @@ __lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
int index, prev, next;
LCS_DBF_TEXT(5, trace, "prcsbuff");
- if (buffer->state != BUF_STATE_READY)
- BUG();
- buffer->state = BUF_STATE_PROCESSED;
+ BUG_ON(buffer->state != LCS_BUF_STATE_READY);
+ buffer->state = LCS_BUF_STATE_PROCESSED;
index = buffer - channel->iob;
prev = (index - 1) & (LCS_NUM_BUFFS - 1);
next = (index + 1) & (LCS_NUM_BUFFS - 1);
@@ -716,7 +718,7 @@ __lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
channel->ccws[index].flags |= CCW_FLAG_SUSPEND;
channel->ccws[index].flags &= ~CCW_FLAG_PCI;
/* Check the suspend bit of the previous buffer. */
- if (channel->iob[prev].state == BUF_STATE_READY) {
+ if (channel->iob[prev].state == LCS_BUF_STATE_READY) {
/*
* Previous buffer is in state ready. It might have
* happened in lcs_ready_buffer that the suspend bit
@@ -739,11 +741,10 @@ lcs_release_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
unsigned long flags;
LCS_DBF_TEXT(5, trace, "relbuff");
- if (buffer->state != BUF_STATE_LOCKED &&
- buffer->state != BUF_STATE_PROCESSED)
- BUG();
+ BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED &&
+ buffer->state != LCS_BUF_STATE_PROCESSED);
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
- buffer->state = BUF_STATE_EMPTY;
+ buffer->state = LCS_BUF_STATE_EMPTY;
spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
}
@@ -796,10 +797,9 @@ lcs_alloc_reply(struct lcs_cmd *cmd)
LCS_DBF_TEXT(4, trace, "getreply");
- reply = kmalloc(sizeof(struct lcs_reply), GFP_ATOMIC);
+ reply = kzalloc(sizeof(struct lcs_reply), GFP_ATOMIC);
if (!reply)
return NULL;
- memset(reply,0,sizeof(struct lcs_reply));
atomic_set(&reply->refcnt,1);
reply->sequence_no = cmd->sequence_no;
reply->received = 0;
@@ -838,9 +838,9 @@ lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd)
}
/**
- * Emit buffer of a lan comand.
+ * Emit buffer of a lan command.
*/
-void
+static void
lcs_lancmd_timeout(unsigned long data)
{
struct lcs_reply *reply, *list_reply, *r;
@@ -892,13 +892,14 @@ lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer,
rc = lcs_ready_buffer(&card->write, buffer);
if (rc)
return rc;
- init_timer(&timer);
+ init_timer_on_stack(&timer);
timer.function = lcs_lancmd_timeout;
timer.data = (unsigned long) reply;
timer.expires = jiffies + HZ*card->lancmd_timeout;
add_timer(&timer);
wait_event(reply->wait_q, reply->received);
del_timer_sync(&timer);
+ destroy_timer_on_stack(&timer);
LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc);
rc = reply->rc;
lcs_put_reply(reply);
@@ -1094,7 +1095,7 @@ lcs_check_multicast_support(struct lcs_card *card)
cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
rc = lcs_send_lancmd(card, buffer, __lcs_check_multicast_cb);
if (rc != 0) {
- PRINT_ERR("Query IPAssist failed. Assuming unsupported!\n");
+ pr_err("Query IPAssist failed. Assuming unsupported!\n");
return -EOPNOTSUPP;
}
if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT)
@@ -1120,15 +1121,15 @@ list_modified:
list_for_each_entry_safe(ipm, tmp, &card->ipm_list, list){
switch (ipm->ipm_state) {
case LCS_IPM_STATE_SET_REQUIRED:
- /* del from ipm_list so noone else can tamper with
+ /* del from ipm_list so no one else can tamper with
* this entry */
list_del_init(&ipm->list);
spin_unlock_irqrestore(&card->ipm_lock, flags);
rc = lcs_send_setipm(card, ipm);
spin_lock_irqsave(&card->ipm_lock, flags);
if (rc) {
- PRINT_INFO("Adding multicast address failed."
- "Table possibly full!\n");
+ pr_info("Adding multicast address failed."
+ " Table possibly full!\n");
/* store ipm in failed list -> will be added
* to ipm_list again, so a retry will be done
* during the next call of this function */
@@ -1151,26 +1152,20 @@ list_modified:
}
}
/* re-insert all entries from the failed_list into ipm_list */
- list_for_each_entry_safe(ipm, tmp, &failed_list, list) {
- list_del_init(&ipm->list);
- list_add_tail(&ipm->list, &card->ipm_list);
- }
+ list_for_each_entry_safe(ipm, tmp, &failed_list, list)
+ list_move_tail(&ipm->list, &card->ipm_list);
+
spin_unlock_irqrestore(&card->ipm_lock, flags);
- if (card->state == DEV_STATE_UP)
- netif_wake_queue(card->dev);
}
/**
* get mac address for the relevant Multicast address
*/
static void
-lcs_get_mac_for_ipm(__u32 ipm, char *mac, struct net_device *dev)
+lcs_get_mac_for_ipm(__be32 ipm, char *mac, struct net_device *dev)
{
LCS_DBF_TEXT(4,trace, "getmac");
- if (dev->type == ARPHRD_IEEE802_TR)
- ip_tr_mc_map(ipm, mac);
- else
- ip_eth_mc_map(ipm, mac);
+ ip_eth_mc_map(ipm, mac);
}
/**
@@ -1189,7 +1184,8 @@ lcs_remove_mc_addresses(struct lcs_card *card, struct in_device *in4_dev)
spin_lock_irqsave(&card->ipm_lock, flags);
list_for_each(l, &card->ipm_list) {
ipm = list_entry(l, struct lcs_ipm_list, list);
- for (im4 = in4_dev->mc_list; im4 != NULL; im4 = im4->next) {
+ for (im4 = rcu_dereference(in4_dev->mc_list);
+ im4 != NULL; im4 = rcu_dereference(im4->next_rcu)) {
lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev);
if ( (ipm->ipm.ip_addr == im4->multiaddr) &&
(memcmp(buf, &ipm->ipm.mac_addr,
@@ -1234,23 +1230,23 @@ lcs_set_mc_addresses(struct lcs_card *card, struct in_device *in4_dev)
unsigned long flags;
LCS_DBF_TEXT(4, trace, "setmclst");
- for (im4 = in4_dev->mc_list; im4; im4 = im4->next) {
+ for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL;
+ im4 = rcu_dereference(im4->next_rcu)) {
lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev);
ipm = lcs_check_addr_entry(card, im4, buf);
if (ipm != NULL)
continue; /* Address already in list. */
- ipm = (struct lcs_ipm_list *)
- kmalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC);
+ ipm = kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC);
if (ipm == NULL) {
- PRINT_INFO("Not enough memory to add "
- "new multicast entry!\n");
+ pr_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);
}
@@ -1263,7 +1259,6 @@ lcs_register_mc_addresses(void *data)
struct in_device *in4_dev;
card = (struct lcs_card *) data;
- daemonize("regipm");
if (!lcs_do_run_thread(card, LCS_SET_MC_THREAD))
return 0;
@@ -1272,17 +1267,27 @@ lcs_register_mc_addresses(void *data)
in4_dev = in_dev_get(card->dev);
if (in4_dev == NULL)
goto out;
- read_lock(&in4_dev->mc_list_lock);
+ rcu_read_lock();
lcs_remove_mc_addresses(card,in4_dev);
lcs_set_mc_addresses(card, in4_dev);
- read_unlock(&in4_dev->mc_list_lock);
+ rcu_read_unlock();
in_dev_put(in4_dev);
+ netif_carrier_off(card->dev);
+ netif_tx_disable(card->dev);
+ wait_event(card->write.wait_q,
+ (card->write.state != LCS_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;
}
+#endif /* CONFIG_IP_MULTICAST */
+
/**
* function called by net device to
* handle multicast address relevant things
@@ -1290,17 +1295,16 @@ out:
static void
lcs_set_multicast_list(struct net_device *dev)
{
+#ifdef CONFIG_IP_MULTICAST
struct lcs_card *card;
LCS_DBF_TEXT(4, trace, "setmulti");
- card = (struct lcs_card *) dev->priv;
+ card = (struct lcs_card *) dev->ml_priv;
- if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD)) {
+ if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD))
schedule_work(&card->kernel_thread_starter);
- }
-}
-
#endif /* CONFIG_IP_MULTICAST */
+}
static long
lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb)
@@ -1310,24 +1314,74 @@ lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb)
switch (PTR_ERR(irb)) {
case -EIO:
- PRINT_WARN("i/o-error on device %s\n", cdev->dev.bus_id);
+ dev_warn(&cdev->dev,
+ "An I/O-error occurred on the LCS device\n");
LCS_DBF_TEXT(2, trace, "ckirberr");
LCS_DBF_TEXT_(2, trace, " rc%d", -EIO);
break;
case -ETIMEDOUT:
- PRINT_WARN("timeout on device %s\n", cdev->dev.bus_id);
+ dev_warn(&cdev->dev,
+ "A command timed out on the LCS device\n");
LCS_DBF_TEXT(2, trace, "ckirberr");
LCS_DBF_TEXT_(2, trace, " rc%d", -ETIMEDOUT);
break;
default:
- PRINT_WARN("unknown error %ld on device %s\n", PTR_ERR(irb),
- cdev->dev.bus_id);
+ dev_warn(&cdev->dev,
+ "An error occurred on the LCS device, rc=%ld\n",
+ PTR_ERR(irb));
LCS_DBF_TEXT(2, trace, "ckirberr");
LCS_DBF_TEXT(2, trace, " rc???");
}
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.cmd.cstat;
+ dstat = irb->scsw.cmd.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;
+}
+
+static 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
@@ -1337,7 +1391,8 @@ lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
{
struct lcs_card *card;
struct lcs_channel *channel;
- int index;
+ int rc, index;
+ int cstat, dstat;
if (lcs_check_irb_error(cdev, irb))
return;
@@ -1348,17 +1403,38 @@ lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
else
channel = &card->write;
- 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);
-
+ cstat = irb->scsw.cmd.cstat;
+ dstat = irb->scsw.cmd.dstat;
+ LCS_DBF_TEXT_(5, trace, "Rint%s", dev_name(&cdev->dev));
+ LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.cstat,
+ irb->scsw.cmd.dstat);
+ LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.fctl,
+ irb->scsw.cmd.actl);
+
+ /* Check for channel and device errors presented */
+ rc = lcs_get_problem(cdev, irb);
+ if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) {
+ dev_warn(&cdev->dev,
+ "The LCS device stopped because of an error,"
+ " dstat=0x%X, cstat=0x%X \n",
+ dstat, cstat);
+ if (rc) {
+ channel->state = LCS_CH_STATE_ERROR;
+ }
+ }
+ if (channel->state == LCS_CH_STATE_ERROR) {
+ 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)) {
- index = (struct ccw1 *) __va((addr_t) irb->scsw.cpa)
+ if ((channel->state != LCS_CH_STATE_INIT) &&
+ (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) &&
+ (irb->scsw.cmd.cpa != 0)) {
+ index = (struct ccw1 *) __va((addr_t) irb->scsw.cmd.cpa)
- channel->ccws;
- if ((irb->scsw.actl & SCSW_ACTL_SUSPENDED) ||
- (irb->scsw.cstat | SCHN_STAT_PCI))
+ if ((irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) ||
+ (irb->scsw.cmd.cstat & SCHN_STAT_PCI))
/* Bloody io subsystem tells us lies about cpa... */
index = (index - 1) & (LCS_NUM_BUFFS - 1);
while (channel->io_idx != index) {
@@ -1369,27 +1445,24 @@ lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
}
}
- if ((irb->scsw.dstat & DEV_STAT_DEV_END) ||
- (irb->scsw.dstat & DEV_STAT_CHN_END) ||
- (irb->scsw.dstat & DEV_STAT_UNIT_CHECK))
+ if ((irb->scsw.cmd.dstat & DEV_STAT_DEV_END) ||
+ (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) ||
+ (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK))
/* Mark channel as stopped. */
- channel->state = CH_STATE_STOPPED;
- else if (irb->scsw.actl & SCSW_ACTL_SUSPENDED)
+ channel->state = LCS_CH_STATE_STOPPED;
+ else if (irb->scsw.cmd.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) {
+ channel->state = LCS_CH_STATE_SUSPENDED;
+ if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
+ if (irb->scsw.cmd.cc != 0) {
ccw_device_halt(channel->ccwdev, (addr_t) channel);
return;
}
/* 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;
+ channel->state = LCS_CH_STATE_HALTED;
}
+ if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC)
+ channel->state = LCS_CH_STATE_CLEARED;
/* Do the rest in the tasklet. */
tasklet_schedule(&channel->irq_tasklet);
}
@@ -1404,15 +1477,14 @@ lcs_tasklet(unsigned long data)
struct lcs_channel *channel;
struct lcs_buffer *iob;
int buf_idx;
- int rc;
channel = (struct lcs_channel *) data;
- LCS_DBF_TEXT_(5, trace, "tlet%s",channel->ccwdev->dev.bus_id);
+ LCS_DBF_TEXT_(5, trace, "tlet%s", dev_name(&channel->ccwdev->dev));
/* Check for processed buffers. */
iob = channel->iob;
buf_idx = channel->buf_idx;
- while (iob[buf_idx].state == BUF_STATE_PROCESSED) {
+ while (iob[buf_idx].state == LCS_BUF_STATE_PROCESSED) {
/* Do the callback thing. */
if (iob[buf_idx].callback != NULL)
iob[buf_idx].callback(channel, iob + buf_idx);
@@ -1420,15 +1492,12 @@ lcs_tasklet(unsigned long data)
}
channel->buf_idx = buf_idx;
- if (channel->state == CH_STATE_STOPPED)
- // FIXME: what if rc != 0 ??
- rc = lcs_start_channel(channel);
+ if (channel->state == LCS_CH_STATE_STOPPED)
+ lcs_start_channel(channel);
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
- if (channel->state == CH_STATE_SUSPENDED &&
- channel->iob[channel->io_idx].state == BUF_STATE_READY) {
- // FIXME: what if rc != 0 ??
- rc = __lcs_resume_channel(channel);
- }
+ if (channel->state == LCS_CH_STATE_SUSPENDED &&
+ channel->iob[channel->io_idx].state == LCS_BUF_STATE_READY)
+ __lcs_resume_channel(channel);
spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
/* Something happened on the channel. Wake up waiters. */
@@ -1460,8 +1529,9 @@ lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
LCS_DBF_TEXT(5, trace, "txbuffcb");
/* Put buffer back to pool. */
lcs_release_buffer(channel, buffer);
- card = (struct lcs_card *)
- ((char *) channel - offsetof(struct lcs_card, write));
+ card = container_of(channel, struct lcs_card, write);
+ if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev))
+ netif_wake_queue(card->dev);
spin_lock(&card->lock);
card->tx_emitted--;
if (card->tx_emitted <= 0 && card->tx_buffer != NULL)
@@ -1481,24 +1551,27 @@ __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb,
struct net_device *dev)
{
struct lcs_header *header;
+ int rc = NETDEV_TX_OK;
LCS_DBF_TEXT(5, trace, "hardxmit");
if (skb == NULL) {
card->stats.tx_dropped++;
card->stats.tx_errors++;
- return -EIO;
+ return NETDEV_TX_OK;
}
if (card->state != DEV_STATE_UP) {
dev_kfree_skb(skb);
card->stats.tx_dropped++;
card->stats.tx_errors++;
card->stats.tx_carrier_errors++;
- return 0;
+ return NETDEV_TX_OK;
}
- if (netif_queue_stopped(dev) ) {
- card->stats.tx_dropped++;
- return -EBUSY;
+ if (skb->protocol == htons(ETH_P_IPV6)) {
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
}
+ netif_stop_queue(card->dev);
+ spin_lock(&card->lock);
if (card->tx_buffer != NULL &&
card->tx_buffer->count + sizeof(struct lcs_header) +
skb->len + sizeof(u16) > LCS_IOBUFFERSIZE)
@@ -1509,7 +1582,8 @@ __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb,
card->tx_buffer = lcs_get_buffer(&card->write);
if (card->tx_buffer == NULL) {
card->stats.tx_dropped++;
- return -EBUSY;
+ rc = NETDEV_TX_BUSY;
+ goto out;
}
card->tx_buffer->callback = lcs_txbuffer_cb;
card->tx_buffer->count = 0;
@@ -1520,14 +1594,19 @@ __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb,
header->offset = card->tx_buffer->count;
header->type = card->lan_type;
header->slot = card->portno;
- memcpy(header + 1, skb->data, skb->len);
+ skb_copy_from_linear_data(skb, header + 1, skb->len);
+ spin_unlock(&card->lock);
card->stats.tx_bytes += skb->len;
card->stats.tx_packets++;
dev_kfree_skb(skb);
- if (card->tx_emitted <= 0)
+ netif_wake_queue(card->dev);
+ spin_lock(&card->lock);
+ if (card->tx_emitted <= 0 && card->tx_buffer != NULL)
/* If this is the first tx buffer emit it immediately. */
__lcs_emit_txbuffer(card);
- return 0;
+out:
+ spin_unlock(&card->lock);
+ return rc;
}
static int
@@ -1537,10 +1616,8 @@ lcs_start_xmit(struct sk_buff *skb, struct net_device *dev)
int rc;
LCS_DBF_TEXT(5, trace, "pktxmit");
- card = (struct lcs_card *) dev->priv;
- spin_lock(&card->lock);
+ card = (struct lcs_card *) dev->ml_priv;
rc = __lcs_start_xmit(card, skb, dev);
- spin_unlock(&card->lock);
return rc;
}
@@ -1553,19 +1630,13 @@ lcs_startlan_auto(struct lcs_card *card)
int rc;
LCS_DBF_TEXT(2, trace, "strtauto");
-#ifdef CONFIG_NET_ETHERNET
+#ifdef CONFIG_ETHERNET
card->lan_type = LCS_FRAME_TYPE_ENET;
rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
if (rc == 0)
return 0;
#endif
-#ifdef CONFIG_TR
- card->lan_type = LCS_FRAME_TYPE_TR;
- rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
- if (rc == 0)
- return 0;
-#endif
#ifdef CONFIG_FDDI
card->lan_type = LCS_FRAME_TYPE_FDDI;
rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
@@ -1631,37 +1702,13 @@ lcs_detect(struct lcs_card *card)
card->state = DEV_STATE_UP;
} else {
card->state = DEV_STATE_DOWN;
- card->write.state = CH_STATE_INIT;
- card->read.state = CH_STATE_INIT;
+ card->write.state = LCS_CH_STATE_INIT;
+ card->read.state = LCS_CH_STATE_INIT;
}
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
*/
static int
@@ -1671,8 +1718,10 @@ lcs_stopcard(struct lcs_card *card)
LCS_DBF_TEXT(3, setup, "stopcard");
- if (card->read.state != CH_STATE_STOPPED &&
- card->write.state != CH_STATE_STOPPED &&
+ if (card->read.state != LCS_CH_STATE_STOPPED &&
+ card->write.state != LCS_CH_STATE_STOPPED &&
+ card->read.state != LCS_CH_STATE_ERROR &&
+ card->write.state != LCS_CH_STATE_ERROR &&
card->state == DEV_STATE_UP) {
lcs_clear_multicast_list(card);
rc = lcs_send_stoplan(card,LCS_INITIATOR_TCPIP);
@@ -1685,126 +1734,18 @@ lcs_stopcard(struct lcs_card *card)
}
/**
- * 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
*/
static void
-lcs_start_kernel_thread(struct lcs_card *card)
+lcs_start_kernel_thread(struct work_struct *work)
{
+ struct lcs_card *card = container_of(work, struct lcs_card, kernel_thread_starter);
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))
+ kthread_run(lcs_recovery, card, "lcs_recover");
#ifdef CONFIG_IP_MULTICAST
if (lcs_do_start_thread(card, LCS_SET_MC_THREAD))
- kernel_thread(lcs_register_mc_addresses, (void *) card, SIGCHLD);
+ kthread_run(lcs_register_mc_addresses, card, "regipm");
#endif
}
@@ -1818,22 +1759,17 @@ lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd)
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);
+ pr_warning("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(5, trace, "noLGWcmd");
break;
}
} else
@@ -1856,17 +1792,18 @@ lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len)
skb = dev_alloc_skb(skb_len);
if (skb == NULL) {
- PRINT_ERR("LCS: alloc_skb failed for device=%s\n",
+ dev_err(&card->dev->dev,
+ " Allocating a socket buffer to interface %s failed\n",
card->dev->name);
card->stats.rx_dropped++;
return;
}
- skb->dev = card->dev;
memcpy(skb_put(skb, skb_len), skb_data, skb_len);
skb->protocol = card->lan_type_trans(skb, card->dev);
card->stats.rx_bytes += skb_len;
card->stats.rx_packets++;
- *((__u32 *)skb->cb) = ++card->pkt_seq;
+ if (skb->protocol == htons(ETH_P_802_2))
+ *((__u32 *)skb->cb) = ++card->pkt_seq;
netif_rx(skb);
}
@@ -1886,8 +1823,7 @@ lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
LCS_DBF_TEXT(4, trace, "-eiogpkt");
return;
}
- card = (struct lcs_card *)
- ((char *) channel - offsetof(struct lcs_card, read));
+ card = container_of(channel, struct lcs_card, read);
offset = 0;
while (lcs_hdr->offset != 0) {
if (lcs_hdr->offset <= 0 ||
@@ -1930,7 +1866,7 @@ lcs_getstats(struct net_device *dev)
struct lcs_card *card;
LCS_DBF_TEXT(4, trace, "netstats");
- card = (struct lcs_card *) dev->priv;
+ card = (struct lcs_card *) dev->ml_priv;
return &card->stats;
}
@@ -1945,12 +1881,16 @@ lcs_stop_device(struct net_device *dev)
int rc;
LCS_DBF_TEXT(2, trace, "stopdev");
- card = (struct lcs_card *) dev->priv;
- netif_stop_queue(dev);
+ card = (struct lcs_card *) dev->ml_priv;
+ netif_carrier_off(dev);
+ netif_tx_disable(dev);
dev->flags &= ~IFF_UP;
+ wait_event(card->write.wait_q,
+ (card->write.state != LCS_CH_STATE_RUNNING));
rc = lcs_stopcard(card);
if (rc)
- PRINT_ERR("Try it again!\n ");
+ dev_err(&card->dev->dev,
+ " Shutting down the LCS device failed\n ");
return rc;
}
@@ -1965,14 +1905,15 @@ lcs_open_device(struct net_device *dev)
int rc;
LCS_DBF_TEXT(2, trace, "opendev");
- card = (struct lcs_card *) dev->priv;
+ card = (struct lcs_card *) dev->ml_priv;
/* initialize statistics */
rc = lcs_detect(card);
if (rc) {
- PRINT_ERR("LCS:Error in opening device!\n");
+ pr_err("Error in opening device!\n");
} else {
dev->flags |= IFF_UP;
+ netif_carrier_on(dev);
netif_wake_queue(dev);
card->state = DEV_STATE_UP;
}
@@ -1987,7 +1928,7 @@ lcs_portno_show (struct device *dev, struct device_attribute *attr, char *buf)
{
struct lcs_card *card;
- card = (struct lcs_card *)dev->driver_data;
+ card = dev_get_drvdata(dev);
if (!card)
return 0;
@@ -2002,14 +1943,16 @@ static ssize_t
lcs_portno_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct lcs_card *card;
- int value;
+ int value, rc;
- card = (struct lcs_card *)dev->driver_data;
+ card = dev_get_drvdata(dev);
if (!card)
return 0;
- sscanf(buf, "%u", &value);
+ rc = sscanf(buf, "%d", &value);
+ if (rc != 1)
+ return -EINVAL;
/* TODO: sanity checks */
card->portno = value;
@@ -2019,6 +1962,15 @@ lcs_portno_store (struct device *dev, struct device_attribute *attr, const char
static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store);
+static const char *lcs_type[] = {
+ "not a channel",
+ "2216 parallel",
+ "2216 channel",
+ "OSA LCS card",
+ "unknown channel type",
+ "unsupported channel type",
+};
+
static ssize_t
lcs_type_show(struct device *dev, struct device_attribute *attr, char *buf)
{
@@ -2028,7 +1980,7 @@ lcs_type_show(struct device *dev, struct device_attribute *attr, char *buf)
if (!cgdev)
return -ENODEV;
- return sprintf(buf, "%s\n", cu3088_type[cgdev->cdev[0]->id.driver_info]);
+ return sprintf(buf, "%s\n", lcs_type[cgdev->cdev[0]->id.driver_info]);
}
static DEVICE_ATTR(type, 0444, lcs_type_show, NULL);
@@ -2038,7 +1990,7 @@ lcs_timeout_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct lcs_card *card;
- card = (struct lcs_card *)dev->driver_data;
+ card = dev_get_drvdata(dev);
return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0;
}
@@ -2047,14 +1999,17 @@ static ssize_t
lcs_timeout_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct lcs_card *card;
- int value;
+ unsigned int value;
+ int rc;
- card = (struct lcs_card *)dev->driver_data;
+ card = dev_get_drvdata(dev);
if (!card)
return 0;
- sscanf(buf, "%u", &value);
+ rc = sscanf(buf, "%u", &value);
+ if (rc != 1)
+ return -EINVAL;
/* TODO: sanity checks */
card->lancmd_timeout = value;
@@ -2062,18 +2017,46 @@ lcs_timeout_store (struct device *dev, struct device_attribute *attr, const char
}
-DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store);
+static 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_get_drvdata(dev);
+ 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,
};
-
static struct attribute_group lcs_attr_group = {
.attrs = lcs_attrs,
};
+static const struct attribute_group *lcs_attr_groups[] = {
+ &lcs_attr_group,
+ NULL,
+};
+static const struct device_type lcs_devtype = {
+ .name = "lcs",
+ .groups = lcs_attr_groups,
+};
/**
* lcs_probe_device is called on establishing a new ccwgroup_device.
@@ -2082,7 +2065,6 @@ static int
lcs_probe_device(struct ccwgroup_device *ccwgdev)
{
struct lcs_card *card;
- int ret;
if (!get_device(&ccwgdev->dev))
return -ENODEV;
@@ -2090,21 +2072,21 @@ lcs_probe_device(struct ccwgroup_device *ccwgdev)
LCS_DBF_TEXT(2, setup, "add_dev");
card = lcs_alloc_card();
if (!card) {
- PRINT_ERR("Allocation of lcs card failed\n");
+ LCS_DBF_TEXT_(2, setup, " rc%d", -ENOMEM);
put_device(&ccwgdev->dev);
return -ENOMEM;
}
- ret = sysfs_create_group(&ccwgdev->dev.kobj, &lcs_attr_group);
- if (ret) {
- PRINT_ERR("Creating attributes failed");
- lcs_free_card(card);
- put_device(&ccwgdev->dev);
- return ret;
- }
- ccwgdev->dev.driver_data = card;
+ dev_set_drvdata(&ccwgdev->dev, card);
ccwgdev->cdev[0]->handler = lcs_irq;
ccwgdev->cdev[1]->handler = lcs_irq;
- return 0;
+ card->gdev = ccwgdev;
+ INIT_WORK(&card->kernel_thread_starter, lcs_start_kernel_thread);
+ card->thread_start_mask = 0;
+ card->thread_allowed_mask = 0;
+ card->thread_running_mask = 0;
+ ccwgdev->dev.type = &lcs_devtype;
+
+ return 0;
}
static int
@@ -2113,7 +2095,7 @@ lcs_register_netdev(struct ccwgroup_device *ccwgdev)
struct lcs_card *card;
LCS_DBF_TEXT(2, setup, "regnetdv");
- card = (struct lcs_card *)ccwgdev->dev.driver_data;
+ card = dev_get_drvdata(&ccwgdev->dev);
if (card->dev->reg_state != NETREG_UNINITIALIZED)
return 0;
SET_NETDEV_DEV(card->dev, &ccwgdev->dev);
@@ -2123,6 +2105,20 @@ lcs_register_netdev(struct ccwgroup_device *ccwgdev)
/**
* lcs_new_device will be called by setting the group device online.
*/
+static const struct net_device_ops lcs_netdev_ops = {
+ .ndo_open = lcs_open_device,
+ .ndo_stop = lcs_stop_device,
+ .ndo_get_stats = lcs_getstats,
+ .ndo_start_xmit = lcs_start_xmit,
+};
+
+static const struct net_device_ops lcs_mc_netdev_ops = {
+ .ndo_open = lcs_open_device,
+ .ndo_stop = lcs_stop_device,
+ .ndo_get_stats = lcs_getstats,
+ .ndo_start_xmit = lcs_start_xmit,
+ .ndo_set_rx_mode = lcs_set_multicast_list,
+};
static int
lcs_new_device(struct ccwgroup_device *ccwgdev)
@@ -2132,7 +2128,7 @@ lcs_new_device(struct ccwgroup_device *ccwgdev)
enum lcs_dev_states recover_state;
int rc;
- card = (struct lcs_card *)ccwgdev->dev.driver_data;
+ card = dev_get_drvdata(&ccwgdev->dev);
if (!card)
return -ENODEV;
@@ -2142,8 +2138,12 @@ lcs_new_device(struct ccwgroup_device *ccwgdev)
card->write.ccwdev = ccwgdev->cdev[1];
recover_state = card->state;
- ccw_device_set_online(card->read.ccwdev);
- ccw_device_set_online(card->write.ccwdev);
+ rc = ccw_device_set_online(card->read.ccwdev);
+ if (rc)
+ goto out_err;
+ rc = ccw_device_set_online(card->write.ccwdev);
+ if (rc)
+ goto out_werr;
LCS_DBF_TEXT(3, setup, "lcsnewdv");
@@ -2151,8 +2151,9 @@ lcs_new_device(struct ccwgroup_device *ccwgdev)
rc = lcs_detect(card);
if (rc) {
LCS_DBF_TEXT(2, setup, "dtctfail");
- PRINT_WARN("Detection of LCS card failed with return code "
- "%d (0x%x)\n", rc, rc);
+ dev_err(&card->dev->dev,
+ "Detecting a network adapter for LCS devices"
+ " failed with rc=%d (0x%x)\n", rc, rc);
lcs_stopcard(card);
goto out;
}
@@ -2162,18 +2163,12 @@ lcs_new_device(struct ccwgroup_device *ccwgdev)
goto netdev_out;
}
switch (card->lan_type) {
-#ifdef CONFIG_NET_ETHERNET
+#ifdef CONFIG_ETHERNET
case LCS_FRAME_TYPE_ENET:
card->lan_type_trans = eth_type_trans;
dev = alloc_etherdev(0);
break;
#endif
-#ifdef CONFIG_TR
- case LCS_FRAME_TYPE_TR:
- card->lan_type_trans = tr_type_trans;
- dev = alloc_trdev(0);
- break;
-#endif
#ifdef CONFIG_FDDI
case LCS_FRAME_TYPE_FDDI:
card->lan_type_trans = fddi_type_trans;
@@ -2182,29 +2177,25 @@ lcs_new_device(struct ccwgroup_device *ccwgdev)
#endif
default:
LCS_DBF_TEXT(3, setup, "errinit");
- PRINT_ERR("LCS: Initialization failed\n");
- PRINT_ERR("LCS: No device found!\n");
+ pr_err(" Initialization failed\n");
goto out;
}
if (!dev)
goto out;
card->dev = dev;
- card->dev->priv = card;
- card->dev->open = lcs_open_device;
- card->dev->stop = lcs_stop_device;
- card->dev->hard_start_xmit = lcs_start_xmit;
- card->dev->get_stats = lcs_getstats;
- SET_MODULE_OWNER(dev);
+ card->dev->ml_priv = card;
+ card->dev->netdev_ops = &lcs_netdev_ops;
memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH);
#ifdef CONFIG_IP_MULTICAST
if (!lcs_check_multicast_support(card))
- card->dev->set_multicast_list = lcs_set_multicast_list;
+ card->dev->netdev_ops = &lcs_mc_netdev_ops;
#endif
netdev_out:
lcs_set_allowed_threads(card,0xffffffff);
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 {
@@ -2215,18 +2206,20 @@ netdev_out:
goto out;
/* Print out supported assists: IPv6 */
- PRINT_INFO("LCS device %s %s IPv6 support\n", card->dev->name,
- (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ?
- "with" : "without");
+ pr_info("LCS device %s %s IPv6 support\n", card->dev->name,
+ (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ?
+ "with" : "without");
/* Print out supported assist: Multicast */
- PRINT_INFO("LCS device %s %s Multicast support\n", card->dev->name,
- (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ?
- "with" : "without");
+ pr_info("LCS device %s %s Multicast support\n", card->dev->name,
+ (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ?
+ "with" : "without");
return 0;
out:
- ccw_device_set_offline(card->read.ccwdev);
ccw_device_set_offline(card->write.ccwdev);
+out_werr:
+ ccw_device_set_offline(card->read.ccwdev);
+out_err:
return -ENODEV;
}
@@ -2234,30 +2227,71 @@ out:
* 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;
- int ret;
+ int ret = 0, ret2 = 0, ret3 = 0;
LCS_DBF_TEXT(3, setup, "shtdndev");
- card = (struct lcs_card *)ccwgdev->dev.driver_data;
+ card = dev_get_drvdata(&ccwgdev->dev);
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;
ret = lcs_stop_device(card->dev);
- ret = ccw_device_set_offline(card->read.ccwdev);
- ret = ccw_device_set_offline(card->write.ccwdev);
+ ret2 = ccw_device_set_offline(card->read.ccwdev);
+ ret3 = ccw_device_set_offline(card->write.ccwdev);
+ if (!ret)
+ ret = (ret2) ? ret2 : ret3;
+ if (ret)
+ LCS_DBF_TEXT_(3, setup, "1err:%d", ret);
if (recover_state == DEV_STATE_UP) {
card->state = DEV_STATE_RECOVER;
}
- if (ret)
- return ret;
+ 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;
+
+ 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;
+ dev_warn(&gdev->dev,
+ "A recovery process has been started for the LCS device\n");
+ rc = __lcs_shutdown_device(gdev, 1);
+ rc = lcs_new_device(gdev);
+ if (!rc)
+ pr_info("Device %s successfully recovered!\n",
+ card->dev->name);
+ else
+ pr_info("Device %s could not be recovered!\n",
+ card->dev->name);
+ lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD);
return 0;
}
@@ -2269,11 +2303,10 @@ lcs_remove_device(struct ccwgroup_device *ccwgdev)
{
struct lcs_card *card;
- card = (struct lcs_card *)ccwgdev->dev.driver_data;
+ card = dev_get_drvdata(&ccwgdev->dev);
if (!card)
return;
- PRINT_INFO("Removing lcs group device ....\n");
LCS_DBF_TEXT(3, setup, "remdev");
LCS_DBF_HEX(3, setup, &card, sizeof(void*));
if (ccwgdev->state == CCWGROUP_ONLINE) {
@@ -2281,24 +2314,123 @@ lcs_remove_device(struct ccwgroup_device *ccwgdev)
}
if (card->dev)
unregister_netdev(card->dev);
- sysfs_remove_group(&ccwgdev->dev.kobj, &lcs_attr_group);
lcs_cleanup_card(card);
lcs_free_card(card);
+ dev_set_drvdata(&ccwgdev->dev, NULL);
put_device(&ccwgdev->dev);
}
+static int lcs_pm_suspend(struct lcs_card *card)
+{
+ if (card->dev)
+ netif_device_detach(card->dev);
+ lcs_set_allowed_threads(card, 0);
+ lcs_wait_for_threads(card, 0xffffffff);
+ if (card->state != DEV_STATE_DOWN)
+ __lcs_shutdown_device(card->gdev, 1);
+ return 0;
+}
+
+static int lcs_pm_resume(struct lcs_card *card)
+{
+ int rc = 0;
+
+ if (card->state == DEV_STATE_RECOVER)
+ rc = lcs_new_device(card->gdev);
+ if (card->dev)
+ netif_device_attach(card->dev);
+ if (rc) {
+ dev_warn(&card->gdev->dev, "The lcs device driver "
+ "failed to recover the device\n");
+ }
+ return rc;
+}
+
+static int lcs_prepare(struct ccwgroup_device *gdev)
+{
+ return 0;
+}
+
+static void lcs_complete(struct ccwgroup_device *gdev)
+{
+ return;
+}
+
+static int lcs_freeze(struct ccwgroup_device *gdev)
+{
+ struct lcs_card *card = dev_get_drvdata(&gdev->dev);
+ return lcs_pm_suspend(card);
+}
+
+static int lcs_thaw(struct ccwgroup_device *gdev)
+{
+ struct lcs_card *card = dev_get_drvdata(&gdev->dev);
+ return lcs_pm_resume(card);
+}
+
+static int lcs_restore(struct ccwgroup_device *gdev)
+{
+ struct lcs_card *card = dev_get_drvdata(&gdev->dev);
+ return lcs_pm_resume(card);
+}
+
+static struct ccw_device_id lcs_ids[] = {
+ {CCW_DEVICE(0x3088, 0x08), .driver_info = lcs_channel_type_parallel},
+ {CCW_DEVICE(0x3088, 0x1f), .driver_info = lcs_channel_type_2216},
+ {CCW_DEVICE(0x3088, 0x60), .driver_info = lcs_channel_type_osa2},
+ {},
+};
+MODULE_DEVICE_TABLE(ccw, lcs_ids);
+
+static struct ccw_driver lcs_ccw_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "lcs",
+ },
+ .ids = lcs_ids,
+ .probe = ccwgroup_probe_ccwdev,
+ .remove = ccwgroup_remove_ccwdev,
+ .int_class = IRQIO_LCS,
+};
+
/**
* LCS ccwgroup driver registration
*/
static struct ccwgroup_driver lcs_group_driver = {
- .owner = THIS_MODULE,
- .name = "lcs",
- .max_slaves = 2,
- .driver_id = 0xD3C3E2,
- .probe = lcs_probe_device,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "lcs",
+ },
+ .setup = lcs_probe_device,
.remove = lcs_remove_device,
.set_online = lcs_new_device,
.set_offline = lcs_shutdown_device,
+ .prepare = lcs_prepare,
+ .complete = lcs_complete,
+ .freeze = lcs_freeze,
+ .thaw = lcs_thaw,
+ .restore = lcs_restore,
+};
+
+static ssize_t lcs_driver_group_store(struct device_driver *ddrv,
+ const char *buf, size_t count)
+{
+ int err;
+ err = ccwgroup_create_dev(lcs_root_dev, &lcs_group_driver, 2, buf);
+ return err ? err : count;
+}
+static DRIVER_ATTR(group, 0200, NULL, lcs_driver_group_store);
+
+static struct attribute *lcs_drv_attrs[] = {
+ &driver_attr_group.attr,
+ NULL,
+};
+static struct attribute_group lcs_drv_attr_group = {
+ .attrs = lcs_drv_attrs,
+};
+static const struct attribute_group *lcs_drv_attr_groups[] = {
+ &lcs_drv_attr_group,
+ NULL,
};
/**
@@ -2309,21 +2441,33 @@ __init lcs_init_module(void)
{
int rc;
- PRINT_INFO("Loading %s\n",version);
+ pr_info("Loading %s\n", version);
rc = lcs_register_debug_facility();
LCS_DBF_TEXT(0, setup, "lcsinit");
- if (rc) {
- PRINT_ERR("Initialization failed\n");
- return rc;
- }
-
- rc = register_cu3088_discipline(&lcs_group_driver);
- if (rc) {
- PRINT_ERR("Initialization failed\n");
- return rc;
- }
-
+ if (rc)
+ goto out_err;
+ lcs_root_dev = root_device_register("lcs");
+ rc = PTR_ERR_OR_ZERO(lcs_root_dev);
+ if (rc)
+ goto register_err;
+ rc = ccw_driver_register(&lcs_ccw_driver);
+ if (rc)
+ goto ccw_err;
+ lcs_group_driver.driver.groups = lcs_drv_attr_groups;
+ rc = ccwgroup_driver_register(&lcs_group_driver);
+ if (rc)
+ goto ccwgroup_err;
return 0;
+
+ccwgroup_err:
+ ccw_driver_unregister(&lcs_ccw_driver);
+ccw_err:
+ root_device_unregister(lcs_root_dev);
+register_err:
+ lcs_unregister_debug_facility();
+out_err:
+ pr_err("Initializing the lcs device driver failed\n");
+ return rc;
}
@@ -2333,9 +2477,11 @@ __init lcs_init_module(void)
static void
__exit lcs_cleanup_module(void)
{
- PRINT_INFO("Terminating lcs module.\n");
+ pr_info("Terminating lcs module.\n");
LCS_DBF_TEXT(0, trace, "cleanup");
- unregister_cu3088_discipline(&lcs_group_driver);
+ ccwgroup_driver_unregister(&lcs_group_driver);
+ ccw_driver_unregister(&lcs_ccw_driver);
+ root_device_unregister(lcs_root_dev);
lcs_unregister_debug_facility();
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 18:34:00 +0000