ctcm: infrastructure for replaced ctc driver
ctcm driver supports the channel-to-channel connections of the
old ctc driver plus an additional MPC protocol to provide SNA
connectivity.
This new ctcm driver replaces the existing ctc driver.
Signed-off-by: Peter Tiedemann <ptiedem@de.ibm.com>
Signed-off-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/s390/net/Kconfig b/drivers/s390/net/Kconfig
index 9ef029e..773f5a6 100644
--- a/drivers/s390/net/Kconfig
+++ b/drivers/s390/net/Kconfig
@@ -11,15 +11,17 @@
To compile as a module, choose M. The module name is lcs.ko.
If you do not know what it is, it's safe to choose Y.
-config CTC
- tristate "CTC device support"
+config CTCM
+ tristate "CTC and MPC SNA device support"
depends on CCW && NETDEVICES
help
Select this option if you want to use channel-to-channel
point-to-point networking on IBM System z.
This device driver supports real CTC coupling using ESCON.
It also supports virtual CTCs when running under VM.
- To compile as a module, choose M. The module name is ctc.ko.
+ This driver also supports channel-to-channel MPC SNA devices.
+ MPC is an SNA protocol device used by Communication Server for Linux.
+ To compile as a module, choose M. The module name is ctcm.ko.
To compile into the kernel, choose Y.
If you do not need any channel-to-channel connection, choose N.
@@ -84,7 +86,7 @@
802.1q VLAN support in the qeth device driver.
config CCWGROUP
- tristate
- default (LCS || CTC || QETH)
+ tristate
+ default (LCS || CTCM || QETH)
endmenu
diff --git a/drivers/s390/net/Makefile b/drivers/s390/net/Makefile
index bbe3ab2..f6d189a 100644
--- a/drivers/s390/net/Makefile
+++ b/drivers/s390/net/Makefile
@@ -2,11 +2,10 @@
# S/390 network devices
#
-ctc-objs := ctcmain.o ctcdbug.o
-
+ctcm-y += ctcm_main.o ctcm_fsms.o ctcm_mpc.o ctcm_sysfs.o ctcm_dbug.o
+obj-$(CONFIG_CTCM) += ctcm.o fsm.o cu3088.o
obj-$(CONFIG_NETIUCV) += netiucv.o fsm.o
obj-$(CONFIG_SMSGIUCV) += smsgiucv.o
-obj-$(CONFIG_CTC) += ctc.o fsm.o cu3088.o
obj-$(CONFIG_LCS) += lcs.o cu3088.o
obj-$(CONFIG_CLAW) += claw.o cu3088.o
qeth-y := qeth_main.o qeth_mpc.o qeth_sys.o qeth_eddp.o
diff --git a/drivers/s390/net/ctcm_dbug.c b/drivers/s390/net/ctcm_dbug.c
new file mode 100644
index 0000000..8eb25d0
--- /dev/null
+++ b/drivers/s390/net/ctcm_dbug.c
@@ -0,0 +1,67 @@
+/*
+ * drivers/s390/net/ctcm_dbug.c
+ *
+ * Copyright IBM Corp. 2001, 2007
+ * Authors: Peter Tiedemann (ptiedem@de.ibm.com)
+ *
+ */
+
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/ctype.h>
+#include <linux/sysctl.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/debugfs.h>
+#include "ctcm_dbug.h"
+
+/*
+ * Debug Facility Stuff
+ */
+
+DEFINE_PER_CPU(char[256], ctcm_dbf_txt_buf);
+
+struct ctcm_dbf_info ctcm_dbf[CTCM_DBF_INFOS] = {
+ [CTCM_DBF_SETUP] = {"ctc_setup", 8, 1, 64, 5, NULL},
+ [CTCM_DBF_ERROR] = {"ctc_error", 8, 1, 64, 3, NULL},
+ [CTCM_DBF_TRACE] = {"ctc_trace", 8, 1, 64, 3, NULL},
+ [CTCM_DBF_MPC_SETUP] = {"mpc_setup", 8, 1, 64, 5, NULL},
+ [CTCM_DBF_MPC_ERROR] = {"mpc_error", 8, 1, 64, 3, NULL},
+ [CTCM_DBF_MPC_TRACE] = {"mpc_trace", 8, 1, 64, 3, NULL},
+};
+
+void ctcm_unregister_dbf_views(void)
+{
+ int x;
+ for (x = 0; x < CTCM_DBF_INFOS; x++) {
+ debug_unregister(ctcm_dbf[x].id);
+ ctcm_dbf[x].id = NULL;
+ }
+}
+
+int ctcm_register_dbf_views(void)
+{
+ int x;
+ for (x = 0; x < CTCM_DBF_INFOS; x++) {
+ /* register the areas */
+ ctcm_dbf[x].id = debug_register(ctcm_dbf[x].name,
+ ctcm_dbf[x].pages,
+ ctcm_dbf[x].areas,
+ ctcm_dbf[x].len);
+ if (ctcm_dbf[x].id == NULL) {
+ ctcm_unregister_dbf_views();
+ return -ENOMEM;
+ }
+
+ /* register a view */
+ debug_register_view(ctcm_dbf[x].id, &debug_hex_ascii_view);
+ /* set a passing level */
+ debug_set_level(ctcm_dbf[x].id, ctcm_dbf[x].level);
+ }
+
+ return 0;
+}
+
diff --git a/drivers/s390/net/ctcm_dbug.h b/drivers/s390/net/ctcm_dbug.h
new file mode 100644
index 0000000..fdff34f
--- /dev/null
+++ b/drivers/s390/net/ctcm_dbug.h
@@ -0,0 +1,158 @@
+/*
+ * drivers/s390/net/ctcm_dbug.h
+ *
+ * Copyright IBM Corp. 2001, 2007
+ * Authors: Peter Tiedemann (ptiedem@de.ibm.com)
+ *
+ */
+
+#ifndef _CTCM_DBUG_H_
+#define _CTCM_DBUG_H_
+
+/*
+ * Debug Facility stuff
+ */
+
+#include <asm/debug.h>
+
+#ifdef DEBUG
+ #define do_debug 1
+#else
+ #define do_debug 0
+#endif
+#ifdef DEBUGDATA
+ #define do_debug_data 1
+#else
+ #define do_debug_data 0
+#endif
+#ifdef DEBUGCCW
+ #define do_debug_ccw 1
+#else
+ #define do_debug_ccw 0
+#endif
+
+/* define dbf debug levels similar to kernel msg levels */
+#define CTC_DBF_ALWAYS 0 /* always print this */
+#define CTC_DBF_EMERG 0 /* system is unusable */
+#define CTC_DBF_ALERT 1 /* action must be taken immediately */
+#define CTC_DBF_CRIT 2 /* critical conditions */
+#define CTC_DBF_ERROR 3 /* error conditions */
+#define CTC_DBF_WARN 4 /* warning conditions */
+#define CTC_DBF_NOTICE 5 /* normal but significant condition */
+#define CTC_DBF_INFO 5 /* informational */
+#define CTC_DBF_DEBUG 6 /* debug-level messages */
+
+DECLARE_PER_CPU(char[256], ctcm_dbf_txt_buf);
+
+enum ctcm_dbf_names {
+ CTCM_DBF_SETUP,
+ CTCM_DBF_ERROR,
+ CTCM_DBF_TRACE,
+ CTCM_DBF_MPC_SETUP,
+ CTCM_DBF_MPC_ERROR,
+ CTCM_DBF_MPC_TRACE,
+ CTCM_DBF_INFOS /* must be last element */
+};
+
+struct ctcm_dbf_info {
+ char name[DEBUG_MAX_NAME_LEN];
+ int pages;
+ int areas;
+ int len;
+ int level;
+ debug_info_t *id;
+};
+
+extern struct ctcm_dbf_info ctcm_dbf[CTCM_DBF_INFOS];
+
+int ctcm_register_dbf_views(void);
+void ctcm_unregister_dbf_views(void);
+
+static inline const char *strtail(const char *s, int n)
+{
+ int l = strlen(s);
+ return (l > n) ? s + (l - n) : s;
+}
+
+/* sort out levels early to avoid unnecessary sprintfs */
+static inline int ctcm_dbf_passes(debug_info_t *dbf_grp, int level)
+{
+ return (dbf_grp->level >= level);
+}
+
+#define CTCM_FUNTAIL strtail((char *)__func__, 16)
+
+#define CTCM_DBF_TEXT(name, level, text) \
+ do { \
+ debug_text_event(ctcm_dbf[CTCM_DBF_##name].id, level, text); \
+ } while (0)
+
+#define CTCM_DBF_HEX(name, level, addr, len) \
+ do { \
+ debug_event(ctcm_dbf[CTCM_DBF_##name].id, \
+ level, (void *)(addr), len); \
+ } while (0)
+
+#define CTCM_DBF_TEXT_(name, level, text...) \
+ do { \
+ if (ctcm_dbf_passes(ctcm_dbf[CTCM_DBF_##name].id, level)) { \
+ char *ctcm_dbf_txt_buf = \
+ get_cpu_var(ctcm_dbf_txt_buf); \
+ sprintf(ctcm_dbf_txt_buf, text); \
+ debug_text_event(ctcm_dbf[CTCM_DBF_##name].id, \
+ level, ctcm_dbf_txt_buf); \
+ put_cpu_var(ctcm_dbf_txt_buf); \
+ } \
+ } while (0)
+
+/*
+ * cat : one of {setup, mpc_setup, trace, mpc_trace, error, mpc_error}.
+ * dev : netdevice with valid name field.
+ * text: any text string.
+ */
+#define CTCM_DBF_DEV_NAME(cat, dev, text) \
+ do { \
+ CTCM_DBF_TEXT_(cat, CTC_DBF_INFO, "%s(%s) : %s", \
+ CTCM_FUNTAIL, dev->name, text); \
+ } while (0)
+
+#define MPC_DBF_DEV_NAME(cat, dev, text) \
+ do { \
+ CTCM_DBF_TEXT_(MPC_##cat, CTC_DBF_INFO, "%s(%s) : %s", \
+ CTCM_FUNTAIL, dev->name, text); \
+ } while (0)
+
+#define CTCMY_DBF_DEV_NAME(cat, dev, text) \
+ do { \
+ if (IS_MPCDEV(dev)) \
+ MPC_DBF_DEV_NAME(cat, dev, text); \
+ else \
+ CTCM_DBF_DEV_NAME(cat, dev, text); \
+ } while (0)
+
+/*
+ * cat : one of {setup, mpc_setup, trace, mpc_trace, error, mpc_error}.
+ * dev : netdevice.
+ * text: any text string.
+ */
+#define CTCM_DBF_DEV(cat, dev, text) \
+ do { \
+ CTCM_DBF_TEXT_(cat, CTC_DBF_INFO, "%s(%p) : %s", \
+ CTCM_FUNTAIL, dev, text); \
+ } while (0)
+
+#define MPC_DBF_DEV(cat, dev, text) \
+ do { \
+ CTCM_DBF_TEXT_(MPC_##cat, CTC_DBF_INFO, "%s(%p) : %s", \
+ CTCM_FUNTAIL, dev, text); \
+ } while (0)
+
+#define CTCMY_DBF_DEV(cat, dev, text) \
+ do { \
+ if (IS_MPCDEV(dev)) \
+ MPC_DBF_DEV(cat, dev, text); \
+ else \
+ CTCM_DBF_DEV(cat, dev, text); \
+ } while (0)
+
+#endif
diff --git a/drivers/s390/net/ctcm_fsms.c b/drivers/s390/net/ctcm_fsms.c
new file mode 100644
index 0000000..2a106f3
--- /dev/null
+++ b/drivers/s390/net/ctcm_fsms.c
@@ -0,0 +1,2347 @@
+/*
+ * drivers/s390/net/ctcm_fsms.c
+ *
+ * Copyright IBM Corp. 2001, 2007
+ * Authors: Fritz Elfert (felfert@millenux.com)
+ * Peter Tiedemann (ptiedem@de.ibm.com)
+ * MPC additions :
+ * Belinda Thompson (belindat@us.ibm.com)
+ * Andy Richter (richtera@us.ibm.com)
+ */
+
+#undef DEBUG
+#undef DEBUGDATA
+#undef DEBUGCCW
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/bitops.h>
+
+#include <linux/signal.h>
+#include <linux/string.h>
+
+#include <linux/ip.h>
+#include <linux/if_arp.h>
+#include <linux/tcp.h>
+#include <linux/skbuff.h>
+#include <linux/ctype.h>
+#include <net/dst.h>
+
+#include <linux/io.h>
+#include <asm/ccwdev.h>
+#include <asm/ccwgroup.h>
+#include <linux/uaccess.h>
+
+#include <asm/idals.h>
+
+#include "fsm.h"
+#include "cu3088.h"
+
+#include "ctcm_dbug.h"
+#include "ctcm_main.h"
+#include "ctcm_fsms.h"
+
+const char *dev_state_names[] = {
+ [DEV_STATE_STOPPED] = "Stopped",
+ [DEV_STATE_STARTWAIT_RXTX] = "StartWait RXTX",
+ [DEV_STATE_STARTWAIT_RX] = "StartWait RX",
+ [DEV_STATE_STARTWAIT_TX] = "StartWait TX",
+ [DEV_STATE_STOPWAIT_RXTX] = "StopWait RXTX",
+ [DEV_STATE_STOPWAIT_RX] = "StopWait RX",
+ [DEV_STATE_STOPWAIT_TX] = "StopWait TX",
+ [DEV_STATE_RUNNING] = "Running",
+};
+
+const char *dev_event_names[] = {
+ [DEV_EVENT_START] = "Start",
+ [DEV_EVENT_STOP] = "Stop",
+ [DEV_EVENT_RXUP] = "RX up",
+ [DEV_EVENT_TXUP] = "TX up",
+ [DEV_EVENT_RXDOWN] = "RX down",
+ [DEV_EVENT_TXDOWN] = "TX down",
+ [DEV_EVENT_RESTART] = "Restart",
+};
+
+const char *ctc_ch_event_names[] = {
+ [CTC_EVENT_IO_SUCCESS] = "ccw_device success",
+ [CTC_EVENT_IO_EBUSY] = "ccw_device busy",
+ [CTC_EVENT_IO_ENODEV] = "ccw_device enodev",
+ [CTC_EVENT_IO_UNKNOWN] = "ccw_device unknown",
+ [CTC_EVENT_ATTNBUSY] = "Status ATTN & BUSY",
+ [CTC_EVENT_ATTN] = "Status ATTN",
+ [CTC_EVENT_BUSY] = "Status BUSY",
+ [CTC_EVENT_UC_RCRESET] = "Unit check remote reset",
+ [CTC_EVENT_UC_RSRESET] = "Unit check remote system reset",
+ [CTC_EVENT_UC_TXTIMEOUT] = "Unit check TX timeout",
+ [CTC_EVENT_UC_TXPARITY] = "Unit check TX parity",
+ [CTC_EVENT_UC_HWFAIL] = "Unit check Hardware failure",
+ [CTC_EVENT_UC_RXPARITY] = "Unit check RX parity",
+ [CTC_EVENT_UC_ZERO] = "Unit check ZERO",
+ [CTC_EVENT_UC_UNKNOWN] = "Unit check Unknown",
+ [CTC_EVENT_SC_UNKNOWN] = "SubChannel check Unknown",
+ [CTC_EVENT_MC_FAIL] = "Machine check failure",
+ [CTC_EVENT_MC_GOOD] = "Machine check operational",
+ [CTC_EVENT_IRQ] = "IRQ normal",
+ [CTC_EVENT_FINSTAT] = "IRQ final",
+ [CTC_EVENT_TIMER] = "Timer",
+ [CTC_EVENT_START] = "Start",
+ [CTC_EVENT_STOP] = "Stop",
+ /*
+ * additional MPC events
+ */
+ [CTC_EVENT_SEND_XID] = "XID Exchange",
+ [CTC_EVENT_RSWEEP_TIMER] = "MPC Group Sweep Timer",
+};
+
+const char *ctc_ch_state_names[] = {
+ [CTC_STATE_IDLE] = "Idle",
+ [CTC_STATE_STOPPED] = "Stopped",
+ [CTC_STATE_STARTWAIT] = "StartWait",
+ [CTC_STATE_STARTRETRY] = "StartRetry",
+ [CTC_STATE_SETUPWAIT] = "SetupWait",
+ [CTC_STATE_RXINIT] = "RX init",
+ [CTC_STATE_TXINIT] = "TX init",
+ [CTC_STATE_RX] = "RX",
+ [CTC_STATE_TX] = "TX",
+ [CTC_STATE_RXIDLE] = "RX idle",
+ [CTC_STATE_TXIDLE] = "TX idle",
+ [CTC_STATE_RXERR] = "RX error",
+ [CTC_STATE_TXERR] = "TX error",
+ [CTC_STATE_TERM] = "Terminating",
+ [CTC_STATE_DTERM] = "Restarting",
+ [CTC_STATE_NOTOP] = "Not operational",
+ /*
+ * additional MPC states
+ */
+ [CH_XID0_PENDING] = "Pending XID0 Start",
+ [CH_XID0_INPROGRESS] = "In XID0 Negotiations ",
+ [CH_XID7_PENDING] = "Pending XID7 P1 Start",
+ [CH_XID7_PENDING1] = "Active XID7 P1 Exchange ",
+ [CH_XID7_PENDING2] = "Pending XID7 P2 Start ",
+ [CH_XID7_PENDING3] = "Active XID7 P2 Exchange ",
+ [CH_XID7_PENDING4] = "XID7 Complete - Pending READY ",
+};
+
+static void ctcm_action_nop(fsm_instance *fi, int event, void *arg);
+
+/*
+ * ----- static ctcm actions for channel statemachine -----
+ *
+*/
+static void chx_txdone(fsm_instance *fi, int event, void *arg);
+static void chx_rx(fsm_instance *fi, int event, void *arg);
+static void chx_rxidle(fsm_instance *fi, int event, void *arg);
+static void chx_firstio(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_start(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg);
+
+/*
+ * ----- static ctcmpc actions for ctcmpc channel statemachine -----
+ *
+*/
+static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg);
+static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg);
+static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg);
+/* shared :
+static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_start(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg);
+static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg);
+*/
+static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg);
+static void ctcmpc_chx_attnbusy(fsm_instance *, int, void *);
+static void ctcmpc_chx_resend(fsm_instance *, int, void *);
+static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg);
+
+/**
+ * Check return code of a preceeding ccw_device call, halt_IO etc...
+ *
+ * ch : The channel, the error belongs to.
+ * Returns the error code (!= 0) to inspect.
+ */
+void ctcm_ccw_check_rc(struct channel *ch, int rc, char *msg)
+{
+ CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
+ "ccw error %s (%s): %04x\n", ch->id, msg, rc);
+ switch (rc) {
+ case -EBUSY:
+ ctcm_pr_warn("%s (%s): Busy !\n", ch->id, msg);
+ fsm_event(ch->fsm, CTC_EVENT_IO_EBUSY, ch);
+ break;
+ case -ENODEV:
+ ctcm_pr_emerg("%s (%s): Invalid device called for IO\n",
+ ch->id, msg);
+ fsm_event(ch->fsm, CTC_EVENT_IO_ENODEV, ch);
+ break;
+ default:
+ ctcm_pr_emerg("%s (%s): Unknown error in do_IO %04x\n",
+ ch->id, msg, rc);
+ fsm_event(ch->fsm, CTC_EVENT_IO_UNKNOWN, ch);
+ }
+}
+
+void ctcm_purge_skb_queue(struct sk_buff_head *q)
+{
+ struct sk_buff *skb;
+
+ CTCM_DBF_TEXT(TRACE, 3, __FUNCTION__);
+
+ while ((skb = skb_dequeue(q))) {
+ atomic_dec(&skb->users);
+ dev_kfree_skb_any(skb);
+ }
+}
+
+/**
+ * NOP action for statemachines
+ */
+static void ctcm_action_nop(fsm_instance *fi, int event, void *arg)
+{
+}
+
+/*
+ * Actions for channel - statemachines.
+ */
+
+/**
+ * Normal data has been send. Free the corresponding
+ * skb (it's in io_queue), reset dev->tbusy and
+ * revert to idle state.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void chx_txdone(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct sk_buff *skb;
+ int first = 1;
+ int i;
+ unsigned long duration;
+ struct timespec done_stamp = current_kernel_time(); /* xtime */
+
+ duration =
+ (done_stamp.tv_sec - ch->prof.send_stamp.tv_sec) * 1000000 +
+ (done_stamp.tv_nsec - ch->prof.send_stamp.tv_nsec) / 1000;
+ if (duration > ch->prof.tx_time)
+ ch->prof.tx_time = duration;
+
+ if (ch->irb->scsw.count != 0)
+ ctcm_pr_debug("%s: TX not complete, remaining %d bytes\n",
+ dev->name, ch->irb->scsw.count);
+ fsm_deltimer(&ch->timer);
+ while ((skb = skb_dequeue(&ch->io_queue))) {
+ priv->stats.tx_packets++;
+ priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH;
+ if (first) {
+ priv->stats.tx_bytes += 2;
+ first = 0;
+ }
+ atomic_dec(&skb->users);
+ dev_kfree_skb_irq(skb);
+ }
+ spin_lock(&ch->collect_lock);
+ clear_normalized_cda(&ch->ccw[4]);
+ if (ch->collect_len > 0) {
+ int rc;
+
+ if (ctcm_checkalloc_buffer(ch)) {
+ spin_unlock(&ch->collect_lock);
+ return;
+ }
+ ch->trans_skb->data = ch->trans_skb_data;
+ skb_reset_tail_pointer(ch->trans_skb);
+ ch->trans_skb->len = 0;
+ if (ch->prof.maxmulti < (ch->collect_len + 2))
+ ch->prof.maxmulti = ch->collect_len + 2;
+ if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue))
+ ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue);
+ *((__u16 *)skb_put(ch->trans_skb, 2)) = ch->collect_len + 2;
+ i = 0;
+ while ((skb = skb_dequeue(&ch->collect_queue))) {
+ skb_copy_from_linear_data(skb,
+ skb_put(ch->trans_skb, skb->len), skb->len);
+ priv->stats.tx_packets++;
+ priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH;
+ atomic_dec(&skb->users);
+ dev_kfree_skb_irq(skb);
+ i++;
+ }
+ ch->collect_len = 0;
+ spin_unlock(&ch->collect_lock);
+ ch->ccw[1].count = ch->trans_skb->len;
+ fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
+ ch->prof.send_stamp = current_kernel_time(); /* xtime */
+ rc = ccw_device_start(ch->cdev, &ch->ccw[0],
+ (unsigned long)ch, 0xff, 0);
+ ch->prof.doios_multi++;
+ if (rc != 0) {
+ priv->stats.tx_dropped += i;
+ priv->stats.tx_errors += i;
+ fsm_deltimer(&ch->timer);
+ ctcm_ccw_check_rc(ch, rc, "chained TX");
+ }
+ } else {
+ spin_unlock(&ch->collect_lock);
+ fsm_newstate(fi, CTC_STATE_TXIDLE);
+ }
+ ctcm_clear_busy_do(dev);
+}
+
+/**
+ * Initial data is sent.
+ * Notify device statemachine that we are up and
+ * running.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+void ctcm_chx_txidle(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+
+ CTCM_DBF_TEXT(TRACE, 6, __FUNCTION__);
+ fsm_deltimer(&ch->timer);
+ fsm_newstate(fi, CTC_STATE_TXIDLE);
+ fsm_event(priv->fsm, DEV_EVENT_TXUP, ch->netdev);
+}
+
+/**
+ * Got normal data, check for sanity, queue it up, allocate new buffer
+ * trigger bottom half, and initiate next read.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void chx_rx(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ int len = ch->max_bufsize - ch->irb->scsw.count;
+ struct sk_buff *skb = ch->trans_skb;
+ __u16 block_len = *((__u16 *)skb->data);
+ int check_len;
+ int rc;
+
+ fsm_deltimer(&ch->timer);
+ if (len < 8) {
+ ctcm_pr_debug("%s: got packet with length %d < 8\n",
+ dev->name, len);
+ priv->stats.rx_dropped++;
+ priv->stats.rx_length_errors++;
+ goto again;
+ }
+ if (len > ch->max_bufsize) {
+ ctcm_pr_debug("%s: got packet with length %d > %d\n",
+ dev->name, len, ch->max_bufsize);
+ priv->stats.rx_dropped++;
+ priv->stats.rx_length_errors++;
+ goto again;
+ }
+
+ /*
+ * VM TCP seems to have a bug sending 2 trailing bytes of garbage.
+ */
+ switch (ch->protocol) {
+ case CTCM_PROTO_S390:
+ case CTCM_PROTO_OS390:
+ check_len = block_len + 2;
+ break;
+ default:
+ check_len = block_len;
+ break;
+ }
+ if ((len < block_len) || (len > check_len)) {
+ ctcm_pr_debug("%s: got block length %d != rx length %d\n",
+ dev->name, block_len, len);
+ if (do_debug)
+ ctcmpc_dump_skb(skb, 0);
+
+ *((__u16 *)skb->data) = len;
+ priv->stats.rx_dropped++;
+ priv->stats.rx_length_errors++;
+ goto again;
+ }
+ block_len -= 2;
+ if (block_len > 0) {
+ *((__u16 *)skb->data) = block_len;
+ ctcm_unpack_skb(ch, skb);
+ }
+ again:
+ skb->data = ch->trans_skb_data;
+ skb_reset_tail_pointer(skb);
+ skb->len = 0;
+ if (ctcm_checkalloc_buffer(ch))
+ return;
+ ch->ccw[1].count = ch->max_bufsize;
+ rc = ccw_device_start(ch->cdev, &ch->ccw[0],
+ (unsigned long)ch, 0xff, 0);
+ if (rc != 0)
+ ctcm_ccw_check_rc(ch, rc, "normal RX");
+}
+
+/**
+ * Initialize connection by sending a __u16 of value 0.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void chx_firstio(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ int rc;
+
+ CTCM_DBF_TEXT(TRACE, 6, __FUNCTION__);
+
+ if (fsm_getstate(fi) == CTC_STATE_TXIDLE)
+ ctcm_pr_debug("%s: remote side issued READ?, init.\n", ch->id);
+ fsm_deltimer(&ch->timer);
+ if (ctcm_checkalloc_buffer(ch))
+ return;
+ if ((fsm_getstate(fi) == CTC_STATE_SETUPWAIT) &&
+ (ch->protocol == CTCM_PROTO_OS390)) {
+ /* OS/390 resp. z/OS */
+ if (CHANNEL_DIRECTION(ch->flags) == READ) {
+ *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN;
+ fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC,
+ CTC_EVENT_TIMER, ch);
+ chx_rxidle(fi, event, arg);
+ } else {
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ fsm_newstate(fi, CTC_STATE_TXIDLE);
+ fsm_event(priv->fsm, DEV_EVENT_TXUP, dev);
+ }
+ return;
+ }
+
+ /*
+ * Don't setup a timer for receiving the initial RX frame
+ * if in compatibility mode, since VM TCP delays the initial
+ * frame until it has some data to send.
+ */
+ if ((CHANNEL_DIRECTION(ch->flags) == WRITE) ||
+ (ch->protocol != CTCM_PROTO_S390))
+ fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
+
+ *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN;
+ ch->ccw[1].count = 2; /* Transfer only length */
+
+ fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == READ)
+ ? CTC_STATE_RXINIT : CTC_STATE_TXINIT);
+ rc = ccw_device_start(ch->cdev, &ch->ccw[0],
+ (unsigned long)ch, 0xff, 0);
+ if (rc != 0) {
+ fsm_deltimer(&ch->timer);
+ fsm_newstate(fi, CTC_STATE_SETUPWAIT);
+ ctcm_ccw_check_rc(ch, rc, "init IO");
+ }
+ /*
+ * If in compatibility mode since we don't setup a timer, we
+ * also signal RX channel up immediately. This enables us
+ * to send packets early which in turn usually triggers some
+ * reply from VM TCP which brings up the RX channel to it's
+ * final state.
+ */
+ if ((CHANNEL_DIRECTION(ch->flags) == READ) &&
+ (ch->protocol == CTCM_PROTO_S390)) {
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ fsm_event(priv->fsm, DEV_EVENT_RXUP, dev);
+ }
+}
+
+/**
+ * Got initial data, check it. If OK,
+ * notify device statemachine that we are up and
+ * running.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void chx_rxidle(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ __u16 buflen;
+ int rc;
+
+ CTCM_DBF_TEXT(TRACE, 6, __FUNCTION__);
+ fsm_deltimer(&ch->timer);
+ buflen = *((__u16 *)ch->trans_skb->data);
+ if (do_debug)
+ ctcm_pr_debug("%s: Initial RX count %d\n", dev->name, buflen);
+
+ if (buflen >= CTCM_INITIAL_BLOCKLEN) {
+ if (ctcm_checkalloc_buffer(ch))
+ return;
+ ch->ccw[1].count = ch->max_bufsize;
+ fsm_newstate(fi, CTC_STATE_RXIDLE);
+ rc = ccw_device_start(ch->cdev, &ch->ccw[0],
+ (unsigned long)ch, 0xff, 0);
+ if (rc != 0) {
+ fsm_newstate(fi, CTC_STATE_RXINIT);
+ ctcm_ccw_check_rc(ch, rc, "initial RX");
+ } else
+ fsm_event(priv->fsm, DEV_EVENT_RXUP, dev);
+ } else {
+ if (do_debug)
+ ctcm_pr_debug("%s: Initial RX count %d not %d\n",
+ dev->name, buflen, CTCM_INITIAL_BLOCKLEN);
+ chx_firstio(fi, event, arg);
+ }
+}
+
+/**
+ * Set channel into extended mode.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ int rc;
+ unsigned long saveflags = 0;
+ int timeout = CTCM_TIME_5_SEC;
+
+ fsm_deltimer(&ch->timer);
+ if (IS_MPC(ch)) {
+ timeout = 1500;
+ if (do_debug)
+ ctcm_pr_debug("ctcm enter: %s(): cp=%i ch=0x%p id=%s\n",
+ __FUNCTION__, smp_processor_id(), ch, ch->id);
+ }
+ fsm_addtimer(&ch->timer, timeout, CTC_EVENT_TIMER, ch);
+ fsm_newstate(fi, CTC_STATE_SETUPWAIT);
+ if (do_debug_ccw && IS_MPC(ch))
+ ctcmpc_dumpit((char *)&ch->ccw[6], sizeof(struct ccw1) * 2);
+
+ if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */
+ spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
+ /* Such conditional locking is undeterministic in
+ * static view. => ignore sparse warnings here. */
+
+ rc = ccw_device_start(ch->cdev, &ch->ccw[6],
+ (unsigned long)ch, 0xff, 0);
+ if (event == CTC_EVENT_TIMER) /* see above comments */
+ spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
+ if (rc != 0) {
+ fsm_deltimer(&ch->timer);
+ fsm_newstate(fi, CTC_STATE_STARTWAIT);
+ ctcm_ccw_check_rc(ch, rc, "set Mode");
+ } else
+ ch->retry = 0;
+}
+
+/**
+ * Setup channel.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcm_chx_start(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ int rc;
+ struct net_device *dev;
+ unsigned long saveflags;
+
+ CTCM_DBF_TEXT(TRACE, 5, __FUNCTION__);
+ if (ch == NULL) {
+ ctcm_pr_warn("chx_start ch=NULL\n");
+ return;
+ }
+ if (ch->netdev == NULL) {
+ ctcm_pr_warn("chx_start dev=NULL, id=%s\n", ch->id);
+ return;
+ }
+ dev = ch->netdev;
+
+ if (do_debug)
+ ctcm_pr_debug("%s: %s channel start\n", dev->name,
+ (CHANNEL_DIRECTION(ch->flags) == READ) ? "RX" : "TX");
+
+ if (ch->trans_skb != NULL) {
+ clear_normalized_cda(&ch->ccw[1]);
+ dev_kfree_skb(ch->trans_skb);
+ ch->trans_skb = NULL;
+ }
+ if (CHANNEL_DIRECTION(ch->flags) == READ) {
+ ch->ccw[1].cmd_code = CCW_CMD_READ;
+ ch->ccw[1].flags = CCW_FLAG_SLI;
+ ch->ccw[1].count = 0;
+ } else {
+ ch->ccw[1].cmd_code = CCW_CMD_WRITE;
+ ch->ccw[1].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ ch->ccw[1].count = 0;
+ }
+ if (ctcm_checkalloc_buffer(ch)) {
+ ctcm_pr_notice("%s: %s trans_skb allocation delayed "
+ "until first transfer\n", dev->name,
+ (CHANNEL_DIRECTION(ch->flags) == READ) ? "RX" : "TX");
+ }
+
+ ch->ccw[0].cmd_code = CCW_CMD_PREPARE;
+ ch->ccw[0].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ ch->ccw[0].count = 0;
+ ch->ccw[0].cda = 0;
+ ch->ccw[2].cmd_code = CCW_CMD_NOOP; /* jointed CE + DE */
+ ch->ccw[2].flags = CCW_FLAG_SLI;
+ ch->ccw[2].count = 0;
+ ch->ccw[2].cda = 0;
+ memcpy(&ch->ccw[3], &ch->ccw[0], sizeof(struct ccw1) * 3);
+ ch->ccw[4].cda = 0;
+ ch->ccw[4].flags &= ~CCW_FLAG_IDA;
+
+ fsm_newstate(fi, CTC_STATE_STARTWAIT);
+ fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch);
+ spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
+ rc = ccw_device_halt(ch->cdev, (unsigned long)ch);
+ spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
+ if (rc != 0) {
+ if (rc != -EBUSY)
+ fsm_deltimer(&ch->timer);
+ ctcm_ccw_check_rc(ch, rc, "initial HaltIO");
+ }
+}
+
+/**
+ * Shutdown a channel.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ unsigned long saveflags = 0;
+ int rc;
+ int oldstate;
+
+ CTCM_DBF_TEXT(TRACE, 2, __FUNCTION__);
+ fsm_deltimer(&ch->timer);
+ if (IS_MPC(ch))
+ fsm_deltimer(&ch->sweep_timer);
+
+ fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
+
+ if (event == CTC_EVENT_STOP) /* only for STOP not yet locked */
+ spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
+ /* Such conditional locking is undeterministic in
+ * static view. => ignore sparse warnings here. */
+ oldstate = fsm_getstate(fi);
+ fsm_newstate(fi, CTC_STATE_TERM);
+ rc = ccw_device_halt(ch->cdev, (unsigned long)ch);
+
+ if (event == CTC_EVENT_STOP)
+ spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
+ /* see remark above about conditional locking */
+
+ if (rc != 0 && rc != -EBUSY) {
+ fsm_deltimer(&ch->timer);
+ if (event != CTC_EVENT_STOP) {
+ fsm_newstate(fi, oldstate);
+ ctcm_ccw_check_rc(ch, rc, (char *)__FUNCTION__);
+ }
+ }
+}
+
+/**
+ * Cleanup helper for chx_fail and chx_stopped
+ * cleanup channels queue and notify interface statemachine.
+ *
+ * fi An instance of a channel statemachine.
+ * state The next state (depending on caller).
+ * ch The channel to operate on.
+ */
+static void ctcm_chx_cleanup(fsm_instance *fi, int state,
+ struct channel *ch)
+{
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+
+ CTCM_DBF_TEXT(TRACE, 3, __FUNCTION__);
+
+ fsm_deltimer(&ch->timer);
+ if (IS_MPC(ch))
+ fsm_deltimer(&ch->sweep_timer);
+
+ fsm_newstate(fi, state);
+ if (state == CTC_STATE_STOPPED && ch->trans_skb != NULL) {
+ clear_normalized_cda(&ch->ccw[1]);
+ dev_kfree_skb_any(ch->trans_skb);
+ ch->trans_skb = NULL;
+ }
+
+ ch->th_seg = 0x00;
+ ch->th_seq_num = 0x00;
+ if (CHANNEL_DIRECTION(ch->flags) == READ) {
+ skb_queue_purge(&ch->io_queue);
+ fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
+ } else {
+ ctcm_purge_skb_queue(&ch->io_queue);
+ if (IS_MPC(ch))
+ ctcm_purge_skb_queue(&ch->sweep_queue);
+ spin_lock(&ch->collect_lock);
+ ctcm_purge_skb_queue(&ch->collect_queue);
+ ch->collect_len = 0;
+ spin_unlock(&ch->collect_lock);
+ fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
+ }
+}
+
+/**
+ * A channel has successfully been halted.
+ * Cleanup it's queue and notify interface statemachine.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg)
+{
+ CTCM_DBF_TEXT(TRACE, 3, __FUNCTION__);
+ ctcm_chx_cleanup(fi, CTC_STATE_STOPPED, arg);
+}
+
+/**
+ * A stop command from device statemachine arrived and we are in
+ * not operational mode. Set state to stopped.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg)
+{
+ fsm_newstate(fi, CTC_STATE_STOPPED);
+}
+
+/**
+ * A machine check for no path, not operational status or gone device has
+ * happened.
+ * Cleanup queue and notify interface statemachine.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg)
+{
+ CTCM_DBF_TEXT(TRACE, 3, __FUNCTION__);
+ ctcm_chx_cleanup(fi, CTC_STATE_NOTOP, arg);
+}
+
+/**
+ * Handle error during setup of channel.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+
+ /*
+ * Special case: Got UC_RCRESET on setmode.
+ * This means that remote side isn't setup. In this case
+ * simply retry after some 10 secs...
+ */
+ if ((fsm_getstate(fi) == CTC_STATE_SETUPWAIT) &&
+ ((event == CTC_EVENT_UC_RCRESET) ||
+ (event == CTC_EVENT_UC_RSRESET))) {
+ fsm_newstate(fi, CTC_STATE_STARTRETRY);
+ fsm_deltimer(&ch->timer);
+ fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
+ if (!IS_MPC(ch) && (CHANNEL_DIRECTION(ch->flags) == READ)) {
+ int rc = ccw_device_halt(ch->cdev, (unsigned long)ch);
+ if (rc != 0)
+ ctcm_ccw_check_rc(ch, rc,
+ "HaltIO in chx_setuperr");
+ }
+ return;
+ }
+
+ CTCM_DBF_TEXT_(ERROR, CTC_DBF_CRIT,
+ "%s : %s error during %s channel setup state=%s\n",
+ dev->name, ctc_ch_event_names[event],
+ (CHANNEL_DIRECTION(ch->flags) == READ) ? "RX" : "TX",
+ fsm_getstate_str(fi));
+
+ if (CHANNEL_DIRECTION(ch->flags) == READ) {
+ fsm_newstate(fi, CTC_STATE_RXERR);
+ fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
+ } else {
+ fsm_newstate(fi, CTC_STATE_TXERR);
+ fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
+ }
+}
+
+/**
+ * Restart a channel after an error.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ unsigned long saveflags = 0;
+ int oldstate;
+ int rc;
+
+ CTCM_DBF_TEXT(TRACE, CTC_DBF_NOTICE, __FUNCTION__);
+ fsm_deltimer(&ch->timer);
+ ctcm_pr_debug("%s: %s channel restart\n", dev->name,
+ (CHANNEL_DIRECTION(ch->flags) == READ) ? "RX" : "TX");
+ fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
+ oldstate = fsm_getstate(fi);
+ fsm_newstate(fi, CTC_STATE_STARTWAIT);
+ if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */
+ spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
+ /* Such conditional locking is a known problem for
+ * sparse because its undeterministic in static view.
+ * Warnings should be ignored here. */
+ rc = ccw_device_halt(ch->cdev, (unsigned long)ch);
+ if (event == CTC_EVENT_TIMER)
+ spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
+ if (rc != 0) {
+ if (rc != -EBUSY) {
+ fsm_deltimer(&ch->timer);
+ fsm_newstate(fi, oldstate);
+ }
+ ctcm_ccw_check_rc(ch, rc, "HaltIO in ctcm_chx_restart");
+ }
+}
+
+/**
+ * Handle error during RX initial handshake (exchange of
+ * 0-length block header)
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+
+ CTCM_DBF_TEXT(SETUP, 3, __FUNCTION__);
+ if (event == CTC_EVENT_TIMER) {
+ if (!IS_MPCDEV(dev))
+ /* TODO : check if MPC deletes timer somewhere */
+ fsm_deltimer(&ch->timer);
+ ctcm_pr_debug("%s: Timeout during RX init handshake\n",
+ dev->name);
+ if (ch->retry++ < 3)
+ ctcm_chx_restart(fi, event, arg);
+ else {
+ fsm_newstate(fi, CTC_STATE_RXERR);
+ fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
+ }
+ } else
+ ctcm_pr_warn("%s: Error during RX init handshake\n", dev->name);
+}
+
+/**
+ * Notify device statemachine if we gave up initialization
+ * of RX channel.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+
+ CTCM_DBF_TEXT(SETUP, 3, __FUNCTION__);
+ fsm_newstate(fi, CTC_STATE_RXERR);
+ ctcm_pr_warn("%s: RX busy. Initialization failed\n", dev->name);
+ fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
+}
+
+/**
+ * Handle RX Unit check remote reset (remote disconnected)
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct channel *ch2;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+
+ CTCM_DBF_DEV_NAME(TRACE, dev, "Got remote disconnect, re-initializing");
+ fsm_deltimer(&ch->timer);
+ if (do_debug)
+ ctcm_pr_debug("%s: Got remote disconnect, "
+ "re-initializing ...\n", dev->name);
+ /*
+ * Notify device statemachine
+ */
+ fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
+ fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
+
+ fsm_newstate(fi, CTC_STATE_DTERM);
+ ch2 = priv->channel[WRITE];
+ fsm_newstate(ch2->fsm, CTC_STATE_DTERM);
+
+ ccw_device_halt(ch->cdev, (unsigned long)ch);
+ ccw_device_halt(ch2->cdev, (unsigned long)ch2);
+}
+
+/**
+ * Handle error during TX channel initialization.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+
+ if (event == CTC_EVENT_TIMER) {
+ fsm_deltimer(&ch->timer);
+ CTCM_DBF_DEV_NAME(ERROR, dev,
+ "Timeout during TX init handshake");
+ if (ch->retry++ < 3)
+ ctcm_chx_restart(fi, event, arg);
+ else {
+ fsm_newstate(fi, CTC_STATE_TXERR);
+ fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
+ }
+ } else {
+ CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
+ "%s : %s error during channel setup state=%s",
+ dev->name, ctc_ch_event_names[event],
+ fsm_getstate_str(fi));
+
+ ctcm_pr_warn("%s: Error during TX init handshake\n", dev->name);
+ }
+}
+
+/**
+ * Handle TX timeout by retrying operation.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct sk_buff *skb;
+
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n",
+ __FUNCTION__, smp_processor_id(), ch, ch->id);
+
+ fsm_deltimer(&ch->timer);
+ if (ch->retry++ > 3) {
+ struct mpc_group *gptr = priv->mpcg;
+ ctcm_pr_debug("%s: TX retry failed, restarting channel\n",
+ dev->name);
+ fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
+ /* call restart if not MPC or if MPC and mpcg fsm is ready.
+ use gptr as mpc indicator */
+ if (!(gptr && (fsm_getstate(gptr->fsm) != MPCG_STATE_READY)))
+ ctcm_chx_restart(fi, event, arg);
+ goto done;
+ }
+
+ ctcm_pr_debug("%s: TX retry %d\n", dev->name, ch->retry);
+ skb = skb_peek(&ch->io_queue);
+ if (skb) {
+ int rc = 0;
+ unsigned long saveflags = 0;
+ clear_normalized_cda(&ch->ccw[4]);
+ ch->ccw[4].count = skb->len;
+ if (set_normalized_cda(&ch->ccw[4], skb->data)) {
+ ctcm_pr_debug("%s: IDAL alloc failed, chan restart\n",
+ dev->name);
+ fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
+ ctcm_chx_restart(fi, event, arg);
+ goto done;
+ }
+ fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch);
+ if (event == CTC_EVENT_TIMER) /* for TIMER not yet locked */
+ spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
+ /* Such conditional locking is a known problem for
+ * sparse because its undeterministic in static view.
+ * Warnings should be ignored here. */
+ if (do_debug_ccw)
+ ctcmpc_dumpit((char *)&ch->ccw[3],
+ sizeof(struct ccw1) * 3);
+
+ rc = ccw_device_start(ch->cdev, &ch->ccw[3],
+ (unsigned long)ch, 0xff, 0);
+ if (event == CTC_EVENT_TIMER)
+ spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev),
+ saveflags);
+ if (rc != 0) {
+ fsm_deltimer(&ch->timer);
+ ctcm_ccw_check_rc(ch, rc, "TX in chx_txretry");
+ ctcm_purge_skb_queue(&ch->io_queue);
+ }
+ }
+done:
+ return;
+}
+
+/**
+ * Handle fatal errors during an I/O command.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+
+ CTCM_DBF_TEXT(TRACE, 3, __FUNCTION__);
+ fsm_deltimer(&ch->timer);
+ ctcm_pr_warn("%s %s : unrecoverable channel error\n",
+ CTC_DRIVER_NAME, dev->name);
+ if (IS_MPC(ch)) {
+ priv->stats.tx_dropped++;
+ priv->stats.tx_errors++;
+ }
+
+ if (CHANNEL_DIRECTION(ch->flags) == READ) {
+ ctcm_pr_debug("%s: RX I/O error\n", dev->name);
+ fsm_newstate(fi, CTC_STATE_RXERR);
+ fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
+ } else {
+ ctcm_pr_debug("%s: TX I/O error\n", dev->name);
+ fsm_newstate(fi, CTC_STATE_TXERR);
+ fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
+ }
+}
+
+/*
+ * The ctcm statemachine for a channel.
+ */
+const fsm_node ch_fsm[] = {
+ { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop },
+ { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start },
+ { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop },
+ { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop },
+
+ { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop },
+ { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop },
+ { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop },
+ { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start },
+
+ { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
+ { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr },
+ { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+
+ { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode },
+ { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_action_nop },
+ { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, chx_firstio },
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode },
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+
+ { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, chx_rxidle },
+ { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr },
+ { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr },
+ { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr },
+ { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail },
+ { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, chx_firstio },
+ { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+
+ { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, chx_rx },
+ { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc },
+ { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, chx_rx },
+
+ { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle },
+ { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr },
+ { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr },
+ { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr },
+ { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+
+ { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, chx_firstio },
+ { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
+ { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
+ { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+
+ { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop },
+ { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart },
+ { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped },
+ { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
+ { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
+ { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+
+ { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart },
+ { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
+ { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
+ { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
+ { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+
+ { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_TX, CTC_EVENT_FINSTAT, chx_txdone },
+ { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_txretry },
+ { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_txretry },
+ { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry },
+ { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+
+ { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+};
+
+int ch_fsm_len = ARRAY_SIZE(ch_fsm);
+
+/*
+ * MPC actions for mpc channel statemachine
+ * handling of MPC protocol requires extra
+ * statemachine and actions which are prefixed ctcmpc_ .
+ * The ctc_ch_states and ctc_ch_state_names,
+ * ctc_ch_events and ctc_ch_event_names share the ctcm definitions
+ * which are expanded by some elements.
+ */
+
+/*
+ * Actions for mpc channel statemachine.
+ */
+
+/**
+ * Normal data has been send. Free the corresponding
+ * skb (it's in io_queue), reset dev->tbusy and
+ * revert to idle state.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+ struct sk_buff *skb;
+ int first = 1;
+ int i;
+ struct timespec done_stamp;
+ __u32 data_space;
+ unsigned long duration;
+ struct sk_buff *peekskb;
+ int rc;
+ struct th_header *header;
+ struct pdu *p_header;
+
+ if (do_debug)
+ ctcm_pr_debug("%s cp:%i enter: %s()\n",
+ dev->name, smp_processor_id(), __FUNCTION__);
+
+ done_stamp = current_kernel_time(); /* xtime */
+ duration = (done_stamp.tv_sec - ch->prof.send_stamp.tv_sec) * 1000000
+ + (done_stamp.tv_nsec - ch->prof.send_stamp.tv_nsec) / 1000;
+ if (duration > ch->prof.tx_time)
+ ch->prof.tx_time = duration;
+
+ if (ch->irb->scsw.count != 0)
+ ctcm_pr_debug("%s: TX not complete, remaining %d bytes\n",
+ dev->name, ch->irb->scsw.count);
+ fsm_deltimer(&ch->timer);
+ while ((skb = skb_dequeue(&ch->io_queue))) {
+ priv->stats.tx_packets++;
+ priv->stats.tx_bytes += skb->len - TH_HEADER_LENGTH;
+ if (first) {
+ priv->stats.tx_bytes += 2;
+ first = 0;
+ }
+ atomic_dec(&skb->users);
+ dev_kfree_skb_irq(skb);
+ }
+ spin_lock(&ch->collect_lock);
+ clear_normalized_cda(&ch->ccw[4]);
+
+ if ((ch->collect_len <= 0) || (grp->in_sweep != 0)) {
+ spin_unlock(&ch->collect_lock);
+ fsm_newstate(fi, CTC_STATE_TXIDLE);
+ goto done;
+ }
+
+ if (ctcm_checkalloc_buffer(ch)) {
+ spin_unlock(&ch->collect_lock);
+ goto done;
+ }
+ ch->trans_skb->data = ch->trans_skb_data;
+ skb_reset_tail_pointer(ch->trans_skb);
+ ch->trans_skb->len = 0;
+ if (ch->prof.maxmulti < (ch->collect_len + TH_HEADER_LENGTH))
+ ch->prof.maxmulti = ch->collect_len + TH_HEADER_LENGTH;
+ if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue))
+ ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue);
+ i = 0;
+
+ if (do_debug_data)
+ ctcm_pr_debug("ctcmpc: %s() building "
+ "trans_skb from collect_q \n", __FUNCTION__);
+
+ data_space = grp->group_max_buflen - TH_HEADER_LENGTH;
+
+ if (do_debug_data)
+ ctcm_pr_debug("ctcmpc: %s() building trans_skb from collect_q"
+ " data_space:%04x\n", __FUNCTION__, data_space);
+ p_header = NULL;
+ while ((skb = skb_dequeue(&ch->collect_queue))) {
+ memcpy(skb_put(ch->trans_skb, skb->len), skb->data, skb->len);
+ p_header = (struct pdu *)
+ (skb_tail_pointer(ch->trans_skb) - skb->len);
+ p_header->pdu_flag = 0x00;
+ if (skb->protocol == ntohs(ETH_P_SNAP))
+ p_header->pdu_flag |= 0x60;
+ else
+ p_header->pdu_flag |= 0x20;
+
+ if (do_debug_data) {
+ ctcm_pr_debug("ctcmpc: %s()trans_skb len:%04x \n",
+ __FUNCTION__, ch->trans_skb->len);
+ ctcm_pr_debug("ctcmpc: %s() pdu header and data"
+ " for up to 32 bytes sent to vtam\n",
+ __FUNCTION__);
+ ctcmpc_dumpit((char *)p_header,
+ min_t(int, skb->len, 32));
+ }
+ ch->collect_len -= skb->len;
+ data_space -= skb->len;
+ priv->stats.tx_packets++;
+ priv->stats.tx_bytes += skb->len;
+ atomic_dec(&skb->users);
+ dev_kfree_skb_any(skb);
+ peekskb = skb_peek(&ch->collect_queue);
+ if (peekskb->len > data_space)
+ break;
+ i++;
+ }
+ /* p_header points to the last one we handled */
+ if (p_header)
+ p_header->pdu_flag |= PDU_LAST; /*Say it's the last one*/
+ header = kzalloc(TH_HEADER_LENGTH, gfp_type());
+
+ if (!header) {
+ printk(KERN_WARNING "ctcmpc: OUT OF MEMORY IN %s()"
+ ": Data Lost \n", __FUNCTION__);
+ spin_unlock(&ch->collect_lock);
+ fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
+ goto done;
+ }
+
+ header->th_ch_flag = TH_HAS_PDU; /* Normal data */
+ ch->th_seq_num++;
+ header->th_seq_num = ch->th_seq_num;
+
+ if (do_debug_data)
+ ctcm_pr_debug("%s: ToVTAM_th_seq= %08x\n" ,
+ __FUNCTION__, ch->th_seq_num);
+
+ memcpy(skb_push(ch->trans_skb, TH_HEADER_LENGTH), header,
+ TH_HEADER_LENGTH); /* put the TH on the packet */
+
+ kfree(header);
+
+ if (do_debug_data) {
+ ctcm_pr_debug("ctcmpc: %s()trans_skb len:%04x \n",
+ __FUNCTION__, ch->trans_skb->len);
+
+ ctcm_pr_debug("ctcmpc: %s() up-to-50 bytes of trans_skb "
+ "data to vtam from collect_q\n", __FUNCTION__);
+ ctcmpc_dumpit((char *)ch->trans_skb->data,
+ min_t(int, ch->trans_skb->len, 50));
+ }
+
+ spin_unlock(&ch->collect_lock);
+ clear_normalized_cda(&ch->ccw[1]);
+ if (set_normalized_cda(&ch->ccw[1], ch->trans_skb->data)) {
+ dev_kfree_skb_any(ch->trans_skb);
+ ch->trans_skb = NULL;
+ printk(KERN_WARNING
+ "ctcmpc: %s()CCW failure - data lost\n",
+ __FUNCTION__);
+ fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
+ return;
+ }
+ ch->ccw[1].count = ch->trans_skb->len;
+ fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
+ ch->prof.send_stamp = current_kernel_time(); /* xtime */
+ if (do_debug_ccw)
+ ctcmpc_dumpit((char *)&ch->ccw[0], sizeof(struct ccw1) * 3);
+ rc = ccw_device_start(ch->cdev, &ch->ccw[0],
+ (unsigned long)ch, 0xff, 0);
+ ch->prof.doios_multi++;
+ if (rc != 0) {
+ priv->stats.tx_dropped += i;
+ priv->stats.tx_errors += i;
+ fsm_deltimer(&ch->timer);
+ ctcm_ccw_check_rc(ch, rc, "chained TX");
+ }
+done:
+ ctcm_clear_busy(dev);
+ ctcm_pr_debug("ctcmpc exit: %s %s()\n", dev->name, __FUNCTION__);
+ return;
+}
+
+/**
+ * Got normal data, check for sanity, queue it up, allocate new buffer
+ * trigger bottom half, and initiate next read.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+ struct sk_buff *skb = ch->trans_skb;
+ struct sk_buff *new_skb;
+ unsigned long saveflags = 0; /* avoids compiler warning */
+ int len = ch->max_bufsize - ch->irb->scsw.count;
+
+ if (do_debug_data) {
+ CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, "mpc_ch_rx %s cp:%i %s\n",
+ dev->name, smp_processor_id(), ch->id);
+ CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, "mpc_ch_rx: maxbuf: %04x "
+ "len: %04x\n", ch->max_bufsize, len);
+ }
+ fsm_deltimer(&ch->timer);
+
+ if (skb == NULL) {
+ ctcm_pr_debug("ctcmpc exit: %s() TRANS_SKB = NULL \n",
+ __FUNCTION__);
+ goto again;
+ }
+
+ if (len < TH_HEADER_LENGTH) {
+ ctcm_pr_info("%s: got packet with invalid length %d\n",
+ dev->name, len);
+ priv->stats.rx_dropped++;
+ priv->stats.rx_length_errors++;
+ } else {
+ /* must have valid th header or game over */
+ __u32 block_len = len;
+ len = TH_HEADER_LENGTH + XID2_LENGTH + 4;
+ new_skb = __dev_alloc_skb(ch->max_bufsize, GFP_ATOMIC);
+
+ if (new_skb == NULL) {
+ printk(KERN_INFO "ctcmpc:%s() NEW_SKB = NULL\n",
+ __FUNCTION__);
+ printk(KERN_WARNING "ctcmpc: %s() MEMORY ALLOC FAILED"
+ " - DATA LOST - MPC FAILED\n",
+ __FUNCTION__);
+ fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
+ goto again;
+ }
+ switch (fsm_getstate(grp->fsm)) {
+ case MPCG_STATE_RESET:
+ case MPCG_STATE_INOP:
+ dev_kfree_skb_any(new_skb);
+ break;
+ case MPCG_STATE_FLOWC:
+ case MPCG_STATE_READY:
+ memcpy(skb_put(new_skb, block_len),
+ skb->data, block_len);
+ skb_queue_tail(&ch->io_queue, new_skb);
+ tasklet_schedule(&ch->ch_tasklet);
+ break;
+ default:
+ memcpy(skb_put(new_skb, len), skb->data, len);
+ skb_queue_tail(&ch->io_queue, new_skb);
+ tasklet_hi_schedule(&ch->ch_tasklet);
+ break;
+ }
+ }
+
+again:
+ switch (fsm_getstate(grp->fsm)) {
+ int rc, dolock;
+ case MPCG_STATE_FLOWC:
+ case MPCG_STATE_READY:
+ if (ctcm_checkalloc_buffer(ch))
+ break;
+ ch->trans_skb->data = ch->trans_skb_data;
+ skb_reset_tail_pointer(ch->trans_skb);
+ ch->trans_skb->len = 0;
+ ch->ccw[1].count = ch->max_bufsize;
+ if (do_debug_ccw)
+ ctcmpc_dumpit((char *)&ch->ccw[0],
+ sizeof(struct ccw1) * 3);
+ dolock = !in_irq();
+ if (dolock)
+ spin_lock_irqsave(
+ get_ccwdev_lock(ch->cdev), saveflags);
+ rc = ccw_device_start(ch->cdev, &ch->ccw[0],
+ (unsigned long)ch, 0xff, 0);
+ if (dolock) /* see remark about conditional locking */
+ spin_unlock_irqrestore(
+ get_ccwdev_lock(ch->cdev), saveflags);
+ if (rc != 0)
+ ctcm_ccw_check_rc(ch, rc, "normal RX");
+ default:
+ break;
+ }
+
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc exit : %s %s(): ch=0x%p id=%s\n",
+ dev->name, __FUNCTION__, ch, ch->id);
+
+}
+
+/**
+ * Initialize connection by sending a __u16 of value 0.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+
+ if (do_debug) {
+ struct mpc_group *gptr = priv->mpcg;
+ ctcm_pr_debug("ctcmpc enter: %s(): ch=0x%p id=%s\n",
+ __FUNCTION__, ch, ch->id);
+ ctcm_pr_debug("%s() %s chstate:%i grpstate:%i chprotocol:%i\n",
+ __FUNCTION__, ch->id, fsm_getstate(fi),
+ fsm_getstate(gptr->fsm), ch->protocol);
+ }
+ if (fsm_getstate(fi) == CTC_STATE_TXIDLE)
+ MPC_DBF_DEV_NAME(TRACE, dev, "remote side issued READ? ");
+
+ fsm_deltimer(&ch->timer);
+ if (ctcm_checkalloc_buffer(ch))
+ goto done;
+
+ switch (fsm_getstate(fi)) {
+ case CTC_STATE_STARTRETRY:
+ case CTC_STATE_SETUPWAIT:
+ if (CHANNEL_DIRECTION(ch->flags) == READ) {
+ ctcmpc_chx_rxidle(fi, event, arg);
+ } else {
+ fsm_newstate(fi, CTC_STATE_TXIDLE);
+ fsm_event(priv->fsm, DEV_EVENT_TXUP, dev);
+ }
+ goto done;
+ default:
+ break;
+ };
+
+ fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == READ)
+ ? CTC_STATE_RXINIT : CTC_STATE_TXINIT);
+
+done:
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc exit : %s(): ch=0x%p id=%s\n",
+ __FUNCTION__, ch, ch->id);
+ return;
+}
+
+/**
+ * Got initial data, check it. If OK,
+ * notify device statemachine that we are up and
+ * running.
+ *
+ * fi An instance of a channel statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from channel * upon call.
+ */
+void ctcmpc_chx_rxidle(fsm_instance *fi, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+ int rc;
+ unsigned long saveflags = 0; /* avoids compiler warning */
+
+ fsm_deltimer(&ch->timer);
+ ctcm_pr_debug("%s cp:%i enter: %s()\n",
+ dev->name, smp_processor_id(), __FUNCTION__);
+ if (do_debug)
+ ctcm_pr_debug("%s() %s chstate:%i grpstate:%i\n",
+ __FUNCTION__, ch->id,
+ fsm_getstate(fi), fsm_getstate(grp->fsm));
+
+ fsm_newstate(fi, CTC_STATE_RXIDLE);
+ /* XID processing complete */
+
+ switch (fsm_getstate(grp->fsm)) {
+ case MPCG_STATE_FLOWC:
+ case MPCG_STATE_READY:
+ if (ctcm_checkalloc_buffer(ch))
+ goto done;
+ ch->trans_skb->data = ch->trans_skb_data;
+ skb_reset_tail_pointer(ch->trans_skb);
+ ch->trans_skb->len = 0;
+ ch->ccw[1].count = ch->max_bufsize;
+ if (do_debug_ccw)
+ ctcmpc_dumpit((char *)&ch->ccw[0],
+ sizeof(struct ccw1) * 3);
+ if (event == CTC_EVENT_START)
+ /* see remark about conditional locking */
+ spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
+ rc = ccw_device_start(ch->cdev, &ch->ccw[0],
+ (unsigned long)ch, 0xff, 0);
+ if (event == CTC_EVENT_START)
+ spin_unlock_irqrestore(
+ get_ccwdev_lock(ch->cdev), saveflags);
+ if (rc != 0) {
+ fsm_newstate(fi, CTC_STATE_RXINIT);
+ ctcm_ccw_check_rc(ch, rc, "initial RX");
+ goto done;
+ }
+ break;
+ default:
+ break;
+ }
+
+ fsm_event(priv->fsm, DEV_EVENT_RXUP, dev);
+done:
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc exit: %s %s()\n",
+ dev->name, __FUNCTION__);
+ return;
+}
+
+/*
+ * ctcmpc channel FSM action
+ * called from several points in ctcmpc_ch_fsm
+ * ctcmpc only
+ */
+static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+
+ if (do_debug) {
+ ctcm_pr_debug("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s"
+ "GrpState:%s ChState:%s\n",
+ __FUNCTION__, smp_processor_id(), ch, ch->id,
+ fsm_getstate_str(grp->fsm),
+ fsm_getstate_str(ch->fsm));
+ }
+
+ switch (fsm_getstate(grp->fsm)) {
+ case MPCG_STATE_XID2INITW:
+ /* ok..start yside xid exchanges */
+ if (!ch->in_mpcgroup)
+ break;
+ if (fsm_getstate(ch->fsm) == CH_XID0_PENDING) {
+ fsm_deltimer(&grp->timer);
+ fsm_addtimer(&grp->timer,
+ MPC_XID_TIMEOUT_VALUE,
+ MPCG_EVENT_TIMER, dev);
+ fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch);
+
+ } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1)
+ /* attn rcvd before xid0 processed via bh */
+ fsm_newstate(ch->fsm, CH_XID7_PENDING1);
+ break;
+ case MPCG_STATE_XID2INITX:
+ case MPCG_STATE_XID0IOWAIT:
+ case MPCG_STATE_XID0IOWAIX:
+ /* attn rcvd before xid0 processed on ch
+ but mid-xid0 processing for group */
+ if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1)
+ fsm_newstate(ch->fsm, CH_XID7_PENDING1);
+ break;
+ case MPCG_STATE_XID7INITW:
+ case MPCG_STATE_XID7INITX:
+ case MPCG_STATE_XID7INITI:
+ case MPCG_STATE_XID7INITZ:
+ switch (fsm_getstate(ch->fsm)) {
+ case CH_XID7_PENDING:
+ fsm_newstate(ch->fsm, CH_XID7_PENDING1);
+ break;
+ case CH_XID7_PENDING2:
+ fsm_newstate(ch->fsm, CH_XID7_PENDING3);
+ break;
+ }
+ fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev);
+ break;
+ }
+
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc exit : %s(): cp=%i ch=0x%p id=%s\n",
+ __FUNCTION__, smp_processor_id(), ch, ch->id);
+ return;
+
+}
+
+/*
+ * ctcmpc channel FSM action
+ * called from one point in ctcmpc_ch_fsm
+ * ctcmpc only
+ */
+static void ctcmpc_chx_attnbusy(fsm_instance *fsm, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+
+ ctcm_pr_debug("ctcmpc enter: %s %s() %s \nGrpState:%s ChState:%s\n",
+ dev->name,
+ __FUNCTION__, ch->id,
+ fsm_getstate_str(grp->fsm),
+ fsm_getstate_str(ch->fsm));
+
+ fsm_deltimer(&ch->timer);
+
+ switch (fsm_getstate(grp->fsm)) {
+ case MPCG_STATE_XID0IOWAIT:
+ /* vtam wants to be primary.start yside xid exchanges*/
+ /* only receive one attn-busy at a time so must not */
+ /* change state each time */
+ grp->changed_side = 1;
+ fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);
+ break;
+ case MPCG_STATE_XID2INITW:
+ if (grp->changed_side == 1) {
+ grp->changed_side = 2;
+ break;
+ }
+ /* process began via call to establish_conn */
+ /* so must report failure instead of reverting */
+ /* back to ready-for-xid passive state */
+ if (grp->estconnfunc)
+ goto done;
+ /* this attnbusy is NOT the result of xside xid */
+ /* collisions so yside must have been triggered */
+ /* by an ATTN that was not intended to start XID */
+ /* processing. Revert back to ready-for-xid and */
+ /* wait for ATTN interrupt to signal xid start */
+ if (fsm_getstate(ch->fsm) == CH_XID0_INPROGRESS) {
+ fsm_newstate(ch->fsm, CH_XID0_PENDING) ;
+ fsm_deltimer(&grp->timer);
+ goto done;
+ }
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ goto done;
+ case MPCG_STATE_XID2INITX:
+ /* XID2 was received before ATTN Busy for second
+ channel.Send yside xid for second channel.
+ */
+ if (grp->changed_side == 1) {
+ grp->changed_side = 2;
+ break;
+ }
+ case MPCG_STATE_XID0IOWAIX:
+ case MPCG_STATE_XID7INITW:
+ case MPCG_STATE_XID7INITX:
+ case MPCG_STATE_XID7INITI:
+ case MPCG_STATE_XID7INITZ:
+ default:
+ /* multiple attn-busy indicates too out-of-sync */
+ /* and they are certainly not being received as part */
+ /* of valid mpc group negotiations.. */
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ goto done;
+ }
+
+ if (grp->changed_side == 1) {
+ fsm_deltimer(&grp->timer);
+ fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE,
+ MPCG_EVENT_TIMER, dev);
+ }
+ if (ch->in_mpcgroup)
+ fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch);
+ else
+ printk(KERN_WARNING "ctcmpc: %s() Not all channels have"
+ " been added to group\n", __FUNCTION__);
+
+done:
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc exit : %s()%s ch=0x%p id=%s\n",
+ __FUNCTION__, dev->name, ch, ch->id);
+
+ return;
+
+}
+
+/*
+ * ctcmpc channel FSM action
+ * called from several points in ctcmpc_ch_fsm
+ * ctcmpc only
+ */
+static void ctcmpc_chx_resend(fsm_instance *fsm, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+
+ ctcm_pr_debug("ctcmpc enter: %s %s() %s \nGrpState:%s ChState:%s\n",
+ dev->name, __FUNCTION__, ch->id,
+ fsm_getstate_str(grp->fsm),
+ fsm_getstate_str(ch->fsm));
+
+ fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch);
+
+ return;
+}
+
+/*
+ * ctcmpc channel FSM action
+ * called from several points in ctcmpc_ch_fsm
+ * ctcmpc only
+ */
+static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg)
+{
+ struct channel *ach = arg;
+ struct net_device *dev = ach->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+ struct channel *wch = priv->channel[WRITE];
+ struct channel *rch = priv->channel[READ];
+ struct sk_buff *skb;
+ struct th_sweep *header;
+ int rc = 0;
+ unsigned long saveflags = 0;
+
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n",
+ __FUNCTION__, smp_processor_id(), ach, ach->id);
+
+ if (grp->in_sweep == 0)
+ goto done;
+
+ if (do_debug_data) {
+ ctcm_pr_debug("ctcmpc: %s() 1: ToVTAM_th_seq= %08x\n" ,
+ __FUNCTION__, wch->th_seq_num);
+ ctcm_pr_debug("ctcmpc: %s() 1: FromVTAM_th_seq= %08x\n" ,
+ __FUNCTION__, rch->th_seq_num);
+ }
+
+ if (fsm_getstate(wch->fsm) != CTC_STATE_TXIDLE) {
+ /* give the previous IO time to complete */
+ fsm_addtimer(&wch->sweep_timer,
+ 200, CTC_EVENT_RSWEEP_TIMER, wch);
+ goto done;
+ }
+
+ skb = skb_dequeue(&wch->sweep_queue);
+ if (!skb)
+ goto done;
+
+ if (set_normalized_cda(&wch->ccw[4], skb->data)) {
+ grp->in_sweep = 0;
+ ctcm_clear_busy_do(dev);
+ dev_kfree_skb_any(skb);
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ goto done;
+ } else {
+ atomic_inc(&skb->users);
+ skb_queue_tail(&wch->io_queue, skb);
+ }
+
+ /* send out the sweep */
+ wch->ccw[4].count = skb->len;
+
+ header = (struct th_sweep *)skb->data;
+ switch (header->th.th_ch_flag) {
+ case TH_SWEEP_REQ:
+ grp->sweep_req_pend_num--;
+ break;
+ case TH_SWEEP_RESP:
+ grp->sweep_rsp_pend_num--;
+ break;
+ }
+
+ header->sw.th_last_seq = wch->th_seq_num;
+
+ if (do_debug_ccw)
+ ctcmpc_dumpit((char *)&wch->ccw[3], sizeof(struct ccw1) * 3);
+
+ ctcm_pr_debug("ctcmpc: %s() sweep packet\n", __FUNCTION__);
+ ctcmpc_dumpit((char *)header, TH_SWEEP_LENGTH);
+
+ fsm_addtimer(&wch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, wch);
+ fsm_newstate(wch->fsm, CTC_STATE_TX);
+
+ spin_lock_irqsave(get_ccwdev_lock(wch->cdev), saveflags);
+ wch->prof.send_stamp = current_kernel_time(); /* xtime */
+ rc = ccw_device_start(wch->cdev, &wch->ccw[3],
+ (unsigned long) wch, 0xff, 0);
+ spin_unlock_irqrestore(get_ccwdev_lock(wch->cdev), saveflags);
+
+ if ((grp->sweep_req_pend_num == 0) &&
+ (grp->sweep_rsp_pend_num == 0)) {
+ grp->in_sweep = 0;
+ rch->th_seq_num = 0x00;
+ wch->th_seq_num = 0x00;
+ ctcm_clear_busy_do(dev);
+ }
+
+ if (do_debug_data) {
+ ctcm_pr_debug("ctcmpc: %s()2: ToVTAM_th_seq= %08x\n" ,
+ __FUNCTION__, wch->th_seq_num);
+ ctcm_pr_debug("ctcmpc: %s()2: FromVTAM_th_seq= %08x\n" ,
+ __FUNCTION__, rch->th_seq_num);
+ }
+
+ if (rc != 0)
+ ctcm_ccw_check_rc(wch, rc, "send sweep");
+
+done:
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc exit: %s() %s\n", __FUNCTION__, ach->id);
+ return;
+}
+
+
+/*
+ * The ctcmpc statemachine for a channel.
+ */
+
+const fsm_node ctcmpc_ch_fsm[] = {
+ { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop },
+ { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start },
+ { CTC_STATE_STOPPED, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop },
+ { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop },
+
+ { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop },
+ { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop },
+ { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop },
+ { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start },
+ { CTC_STATE_NOTOP, CTC_EVENT_UC_RCRESET, ctcm_chx_stop },
+ { CTC_STATE_NOTOP, CTC_EVENT_UC_RSRESET, ctcm_chx_stop },
+ { CTC_STATE_NOTOP, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+
+ { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
+ { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr },
+ { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+
+ { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode },
+ { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
+ { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CTC_STATE_STARTRETRY, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio },
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode },
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+
+ { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, ctcmpc_chx_rxidle },
+ { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr },
+ { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr },
+ { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr },
+ { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail },
+ { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, ctcmpc_chx_firstio },
+ { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+
+ { CH_XID0_PENDING, CTC_EVENT_FINSTAT, ctcm_action_nop },
+ { CH_XID0_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn },
+ { CH_XID0_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CH_XID0_PENDING, CTC_EVENT_START, ctcm_action_nop },
+ { CH_XID0_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CH_XID0_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CH_XID0_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
+ { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
+ { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
+ { CH_XID0_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
+
+ { CH_XID0_INPROGRESS, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
+ { CH_XID0_INPROGRESS, CTC_EVENT_ATTN, ctcmpc_chx_attn },
+ { CH_XID0_INPROGRESS, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CH_XID0_INPROGRESS, CTC_EVENT_START, ctcm_action_nop },
+ { CH_XID0_INPROGRESS, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CH_XID0_INPROGRESS, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CH_XID0_INPROGRESS, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
+ { CH_XID0_INPROGRESS, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
+ { CH_XID0_INPROGRESS, CTC_EVENT_ATTNBUSY, ctcmpc_chx_attnbusy },
+ { CH_XID0_INPROGRESS, CTC_EVENT_TIMER, ctcmpc_chx_resend },
+ { CH_XID0_INPROGRESS, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
+
+ { CH_XID7_PENDING, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
+ { CH_XID7_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn },
+ { CH_XID7_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CH_XID7_PENDING, CTC_EVENT_START, ctcm_action_nop },
+ { CH_XID7_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CH_XID7_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CH_XID7_PENDING, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
+ { CH_XID7_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
+ { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
+ { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
+ { CH_XID7_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
+ { CH_XID7_PENDING, CTC_EVENT_TIMER, ctcmpc_chx_resend },
+ { CH_XID7_PENDING, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
+
+ { CH_XID7_PENDING1, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
+ { CH_XID7_PENDING1, CTC_EVENT_ATTN, ctcmpc_chx_attn },
+ { CH_XID7_PENDING1, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CH_XID7_PENDING1, CTC_EVENT_START, ctcm_action_nop },
+ { CH_XID7_PENDING1, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CH_XID7_PENDING1, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CH_XID7_PENDING1, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
+ { CH_XID7_PENDING1, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
+ { CH_XID7_PENDING1, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
+ { CH_XID7_PENDING1, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
+ { CH_XID7_PENDING1, CTC_EVENT_TIMER, ctcmpc_chx_resend },
+ { CH_XID7_PENDING1, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
+
+ { CH_XID7_PENDING2, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
+ { CH_XID7_PENDING2, CTC_EVENT_ATTN, ctcmpc_chx_attn },
+ { CH_XID7_PENDING2, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CH_XID7_PENDING2, CTC_EVENT_START, ctcm_action_nop },
+ { CH_XID7_PENDING2, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CH_XID7_PENDING2, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CH_XID7_PENDING2, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
+ { CH_XID7_PENDING2, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
+ { CH_XID7_PENDING2, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
+ { CH_XID7_PENDING2, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
+ { CH_XID7_PENDING2, CTC_EVENT_TIMER, ctcmpc_chx_resend },
+ { CH_XID7_PENDING2, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
+
+ { CH_XID7_PENDING3, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
+ { CH_XID7_PENDING3, CTC_EVENT_ATTN, ctcmpc_chx_attn },
+ { CH_XID7_PENDING3, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CH_XID7_PENDING3, CTC_EVENT_START, ctcm_action_nop },
+ { CH_XID7_PENDING3, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CH_XID7_PENDING3, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CH_XID7_PENDING3, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
+ { CH_XID7_PENDING3, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
+ { CH_XID7_PENDING3, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
+ { CH_XID7_PENDING3, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
+ { CH_XID7_PENDING3, CTC_EVENT_TIMER, ctcmpc_chx_resend },
+ { CH_XID7_PENDING3, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
+
+ { CH_XID7_PENDING4, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
+ { CH_XID7_PENDING4, CTC_EVENT_ATTN, ctcmpc_chx_attn },
+ { CH_XID7_PENDING4, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CH_XID7_PENDING4, CTC_EVENT_START, ctcm_action_nop },
+ { CH_XID7_PENDING4, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CH_XID7_PENDING4, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CH_XID7_PENDING4, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
+ { CH_XID7_PENDING4, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
+ { CH_XID7_PENDING4, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
+ { CH_XID7_PENDING4, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
+ { CH_XID7_PENDING4, CTC_EVENT_TIMER, ctcmpc_chx_resend },
+ { CH_XID7_PENDING4, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
+
+ { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
+ { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc },
+ { CTC_STATE_RXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail },
+ { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
+
+ { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle },
+ { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr },
+ { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr },
+ { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr },
+ { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CTC_STATE_TXINIT, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep },
+
+ { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio },
+ { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_fail },
+ { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail },
+ { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CTC_STATE_TXIDLE, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep },
+
+ { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop },
+ { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart },
+ { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped },
+ { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
+ { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
+ { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CTC_STATE_TERM, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
+ { CTC_STATE_TERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+
+ { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart },
+ { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
+ { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
+ { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
+ { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CTC_STATE_DTERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+
+ { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop },
+ { CTC_STATE_TX, CTC_EVENT_FINSTAT, ctcmpc_chx_txdone },
+ { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_fail },
+ { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_fail },
+ { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry },
+ { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CTC_STATE_TX, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep },
+ { CTC_STATE_TX, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
+
+ { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
+ { CTC_STATE_TXERR, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
+ { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+ { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
+};
+
+int mpc_ch_fsm_len = ARRAY_SIZE(ctcmpc_ch_fsm);
+
+/*
+ * Actions for interface - statemachine.
+ */
+
+/**
+ * Startup channels by sending CTC_EVENT_START to each channel.
+ *
+ * fi An instance of an interface statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from struct net_device * upon call.
+ */
+static void dev_action_start(fsm_instance *fi, int event, void *arg)
+{
+ struct net_device *dev = arg;
+ struct ctcm_priv *priv = dev->priv;
+ int direction;
+
+ CTCMY_DBF_DEV_NAME(SETUP, dev, "");
+
+ fsm_deltimer(&priv->restart_timer);
+ fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX);
+ if (IS_MPC(priv))
+ priv->mpcg->channels_terminating = 0;
+ for (direction = READ; direction <= WRITE; direction++) {
+ struct channel *ch = priv->channel[direction];
+ fsm_event(ch->fsm, CTC_EVENT_START, ch);
+ }
+}
+
+/**
+ * Shutdown channels by sending CTC_EVENT_STOP to each channel.
+ *
+ * fi An instance of an interface statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from struct net_device * upon call.
+ */
+static void dev_action_stop(fsm_instance *fi, int event, void *arg)
+{
+ int direction;
+ struct net_device *dev = arg;
+ struct ctcm_priv *priv = dev->priv;
+
+ CTCMY_DBF_DEV_NAME(SETUP, dev, "");
+
+ fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX);
+ for (direction = READ; direction <= WRITE; direction++) {
+ struct channel *ch = priv->channel[direction];
+ fsm_event(ch->fsm, CTC_EVENT_STOP, ch);
+ ch->th_seq_num = 0x00;
+ if (do_debug)
+ ctcm_pr_debug("ctcm: %s() CH_th_seq= %08x\n",
+ __FUNCTION__, ch->th_seq_num);
+ }
+ if (IS_MPC(priv))
+ fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET);
+}
+
+static void dev_action_restart(fsm_instance *fi, int event, void *arg)
+{
+ int restart_timer;
+ struct net_device *dev = arg;
+ struct ctcm_priv *priv = dev->priv;
+
+ CTCMY_DBF_DEV_NAME(TRACE, dev, "");
+
+ if (IS_MPC(priv)) {
+ ctcm_pr_info("ctcm: %s Restarting Device and "
+ "MPC Group in 5 seconds\n",
+ dev->name);
+ restart_timer = CTCM_TIME_1_SEC;
+ } else {
+ ctcm_pr_info("%s: Restarting\n", dev->name);
+ restart_timer = CTCM_TIME_5_SEC;
+ }
+
+ dev_action_stop(fi, event, arg);
+ fsm_event(priv->fsm, DEV_EVENT_STOP, dev);
+ if (IS_MPC(priv))
+ fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET);
+
+ /* going back into start sequence too quickly can */
+ /* result in the other side becoming unreachable due */
+ /* to sense reported when IO is aborted */
+ fsm_addtimer(&priv->restart_timer, restart_timer,
+ DEV_EVENT_START, dev);
+}
+
+/**
+ * Called from channel statemachine
+ * when a channel is up and running.
+ *
+ * fi An instance of an interface statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from struct net_device * upon call.
+ */
+static void dev_action_chup(fsm_instance *fi, int event, void *arg)
+{
+ struct net_device *dev = arg;
+ struct ctcm_priv *priv = dev->priv;
+
+ CTCMY_DBF_DEV_NAME(SETUP, dev, "");
+
+ switch (fsm_getstate(fi)) {
+ case DEV_STATE_STARTWAIT_RXTX:
+ if (event == DEV_EVENT_RXUP)
+ fsm_newstate(fi, DEV_STATE_STARTWAIT_TX);
+ else
+ fsm_newstate(fi, DEV_STATE_STARTWAIT_RX);
+ break;
+ case DEV_STATE_STARTWAIT_RX:
+ if (event == DEV_EVENT_RXUP) {
+ fsm_newstate(fi, DEV_STATE_RUNNING);
+ ctcm_pr_info("%s: connected with remote side\n",
+ dev->name);
+ ctcm_clear_busy(dev);
+ }
+ break;
+ case DEV_STATE_STARTWAIT_TX:
+ if (event == DEV_EVENT_TXUP) {
+ fsm_newstate(fi, DEV_STATE_RUNNING);
+ ctcm_pr_info("%s: connected with remote side\n",
+ dev->name);
+ ctcm_clear_busy(dev);
+ }
+ break;
+ case DEV_STATE_STOPWAIT_TX:
+ if (event == DEV_EVENT_RXUP)
+ fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX);
+ break;
+ case DEV_STATE_STOPWAIT_RX:
+ if (event == DEV_EVENT_TXUP)
+ fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX);
+ break;
+ }
+
+ if (IS_MPC(priv)) {
+ if (event == DEV_EVENT_RXUP)
+ mpc_channel_action(priv->channel[READ],
+ READ, MPC_CHANNEL_ADD);
+ else
+ mpc_channel_action(priv->channel[WRITE],
+ WRITE, MPC_CHANNEL_ADD);
+ }
+}
+
+/**
+ * Called from device statemachine
+ * when a channel has been shutdown.
+ *
+ * fi An instance of an interface statemachine.
+ * event The event, just happened.
+ * arg Generic pointer, casted from struct net_device * upon call.
+ */
+static void dev_action_chdown(fsm_instance *fi, int event, void *arg)
+{
+
+ struct net_device *dev = arg;
+ struct ctcm_priv *priv = dev->priv;
+
+ CTCMY_DBF_DEV_NAME(SETUP, dev, "");
+
+ switch (fsm_getstate(fi)) {
+ case DEV_STATE_RUNNING:
+ if (event == DEV_EVENT_TXDOWN)
+ fsm_newstate(fi, DEV_STATE_STARTWAIT_TX);
+ else
+ fsm_newstate(fi, DEV_STATE_STARTWAIT_RX);
+ break;
+ case DEV_STATE_STARTWAIT_RX:
+ if (event == DEV_EVENT_TXDOWN)
+ fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX);
+ break;
+ case DEV_STATE_STARTWAIT_TX:
+ if (event == DEV_EVENT_RXDOWN)
+ fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX);
+ break;
+ case DEV_STATE_STOPWAIT_RXTX:
+ if (event == DEV_EVENT_TXDOWN)
+ fsm_newstate(fi, DEV_STATE_STOPWAIT_RX);
+ else
+ fsm_newstate(fi, DEV_STATE_STOPWAIT_TX);
+ break;
+ case DEV_STATE_STOPWAIT_RX:
+ if (event == DEV_EVENT_RXDOWN)
+ fsm_newstate(fi, DEV_STATE_STOPPED);
+ break;
+ case DEV_STATE_STOPWAIT_TX:
+ if (event == DEV_EVENT_TXDOWN)
+ fsm_newstate(fi, DEV_STATE_STOPPED);
+ break;
+ }
+ if (IS_MPC(priv)) {
+ if (event == DEV_EVENT_RXDOWN)
+ mpc_channel_action(priv->channel[READ],
+ READ, MPC_CHANNEL_REMOVE);
+ else
+ mpc_channel_action(priv->channel[WRITE],
+ WRITE, MPC_CHANNEL_REMOVE);
+ }
+}
+
+const fsm_node dev_fsm[] = {
+ { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start },
+ { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_START, dev_action_start },
+ { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown },
+ { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown },
+ { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart },
+ { DEV_STATE_STOPWAIT_RX, DEV_EVENT_START, dev_action_start },
+ { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXUP, dev_action_chup },
+ { DEV_STATE_STOPWAIT_RX, DEV_EVENT_TXUP, dev_action_chup },
+ { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXDOWN, dev_action_chdown },
+ { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RESTART, dev_action_restart },
+ { DEV_STATE_STOPWAIT_TX, DEV_EVENT_START, dev_action_start },
+ { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RXUP, dev_action_chup },
+ { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXUP, dev_action_chup },
+ { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXDOWN, dev_action_chdown },
+ { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RESTART, dev_action_restart },
+ { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_STOP, dev_action_stop },
+ { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXUP, dev_action_chup },
+ { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXUP, dev_action_chup },
+ { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown },
+ { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown },
+ { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart },
+ { DEV_STATE_STARTWAIT_TX, DEV_EVENT_STOP, dev_action_stop },
+ { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXUP, dev_action_chup },
+ { DEV_STATE_STARTWAIT_TX, DEV_EVENT_TXUP, dev_action_chup },
+ { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXDOWN, dev_action_chdown },
+ { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RESTART, dev_action_restart },
+ { DEV_STATE_STARTWAIT_RX, DEV_EVENT_STOP, dev_action_stop },
+ { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RXUP, dev_action_chup },
+ { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXUP, dev_action_chup },
+ { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXDOWN, dev_action_chdown },
+ { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RESTART, dev_action_restart },
+ { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop },
+ { DEV_STATE_RUNNING, DEV_EVENT_RXDOWN, dev_action_chdown },
+ { DEV_STATE_RUNNING, DEV_EVENT_TXDOWN, dev_action_chdown },
+ { DEV_STATE_RUNNING, DEV_EVENT_TXUP, ctcm_action_nop },
+ { DEV_STATE_RUNNING, DEV_EVENT_RXUP, ctcm_action_nop },
+ { DEV_STATE_RUNNING, DEV_EVENT_RESTART, dev_action_restart },
+};
+
+int dev_fsm_len = ARRAY_SIZE(dev_fsm);
+
+/* --- This is the END my friend --- */
+
diff --git a/drivers/s390/net/ctcm_fsms.h b/drivers/s390/net/ctcm_fsms.h
new file mode 100644
index 0000000..2326aba
--- /dev/null
+++ b/drivers/s390/net/ctcm_fsms.h
@@ -0,0 +1,359 @@
+/*
+ * drivers/s390/net/ctcm_fsms.h
+ *
+ * Copyright IBM Corp. 2001, 2007
+ * Authors: Fritz Elfert (felfert@millenux.com)
+ * Peter Tiedemann (ptiedem@de.ibm.com)
+ * MPC additions :
+ * Belinda Thompson (belindat@us.ibm.com)
+ * Andy Richter (richtera@us.ibm.com)
+ */
+#ifndef _CTCM_FSMS_H_
+#define _CTCM_FSMS_H_
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/bitops.h>
+
+#include <linux/signal.h>
+#include <linux/string.h>
+
+#include <linux/ip.h>
+#include <linux/if_arp.h>
+#include <linux/tcp.h>
+#include <linux/skbuff.h>
+#include <linux/ctype.h>
+#include <net/dst.h>
+
+#include <linux/io.h>
+#include <asm/ccwdev.h>
+#include <asm/ccwgroup.h>
+#include <linux/uaccess.h>
+
+#include <asm/idals.h>
+
+#include "fsm.h"
+#include "cu3088.h"
+#include "ctcm_main.h"
+
+/*
+ * Definitions for the channel statemachine(s) for ctc and ctcmpc
+ *
+ * To allow better kerntyping, prefix-less definitions for channel states
+ * and channel events have been replaced :
+ * ch_event... -> ctc_ch_event...
+ * CH_EVENT... -> CTC_EVENT...
+ * ch_state... -> ctc_ch_state...
+ * CH_STATE... -> CTC_STATE...
+ */
+/*
+ * Events of the channel statemachine(s) for ctc and ctcmpc
+ */
+enum ctc_ch_events {
+ /*
+ * Events, representing return code of
+ * I/O operations (ccw_device_start, ccw_device_halt et al.)
+ */
+ CTC_EVENT_IO_SUCCESS,
+ CTC_EVENT_IO_EBUSY,
+ CTC_EVENT_IO_ENODEV,
+ CTC_EVENT_IO_UNKNOWN,
+
+ CTC_EVENT_ATTNBUSY,
+ CTC_EVENT_ATTN,
+ CTC_EVENT_BUSY,
+ /*
+ * Events, representing unit-check
+ */
+ CTC_EVENT_UC_RCRESET,
+ CTC_EVENT_UC_RSRESET,
+ CTC_EVENT_UC_TXTIMEOUT,
+ CTC_EVENT_UC_TXPARITY,
+ CTC_EVENT_UC_HWFAIL,
+ CTC_EVENT_UC_RXPARITY,
+ CTC_EVENT_UC_ZERO,
+ CTC_EVENT_UC_UNKNOWN,
+ /*
+ * Events, representing subchannel-check
+ */
+ CTC_EVENT_SC_UNKNOWN,
+ /*
+ * Events, representing machine checks
+ */
+ CTC_EVENT_MC_FAIL,
+ CTC_EVENT_MC_GOOD,
+ /*
+ * Event, representing normal IRQ
+ */
+ CTC_EVENT_IRQ,
+ CTC_EVENT_FINSTAT,
+ /*
+ * Event, representing timer expiry.
+ */
+ CTC_EVENT_TIMER,
+ /*
+ * Events, representing commands from upper levels.
+ */
+ CTC_EVENT_START,
+ CTC_EVENT_STOP,
+ CTC_NR_EVENTS,
+ /*
+ * additional MPC events
+ */
+ CTC_EVENT_SEND_XID = CTC_NR_EVENTS,
+ CTC_EVENT_RSWEEP_TIMER,
+ /*
+ * MUST be always the last element!!
+ */
+ CTC_MPC_NR_EVENTS,
+};
+
+/*
+ * States of the channel statemachine(s) for ctc and ctcmpc.
+ */
+enum ctc_ch_states {
+ /*
+ * Channel not assigned to any device,
+ * initial state, direction invalid
+ */
+ CTC_STATE_IDLE,
+ /*
+ * Channel assigned but not operating
+ */
+ CTC_STATE_STOPPED,
+ CTC_STATE_STARTWAIT,
+ CTC_STATE_STARTRETRY,
+ CTC_STATE_SETUPWAIT,
+ CTC_STATE_RXINIT,
+ CTC_STATE_TXINIT,
+ CTC_STATE_RX,
+ CTC_STATE_TX,
+ CTC_STATE_RXIDLE,
+ CTC_STATE_TXIDLE,
+ CTC_STATE_RXERR,
+ CTC_STATE_TXERR,
+ CTC_STATE_TERM,
+ CTC_STATE_DTERM,
+ CTC_STATE_NOTOP,
+ CTC_NR_STATES, /* MUST be the last element of non-expanded states */
+ /*
+ * additional MPC states
+ */
+ CH_XID0_PENDING = CTC_NR_STATES,
+ CH_XID0_INPROGRESS,
+ CH_XID7_PENDING,
+ CH_XID7_PENDING1,
+ CH_XID7_PENDING2,
+ CH_XID7_PENDING3,
+ CH_XID7_PENDING4,
+ CTC_MPC_NR_STATES, /* MUST be the last element of expanded mpc states */
+};
+
+extern const char *ctc_ch_event_names[];
+
+extern const char *ctc_ch_state_names[];
+
+void ctcm_ccw_check_rc(struct channel *ch, int rc, char *msg);
+void ctcm_purge_skb_queue(struct sk_buff_head *q);
+void fsm_action_nop(fsm_instance *fi, int event, void *arg);
+
+/*
+ * ----- non-static actions for ctcm channel statemachine -----
+ *
+ */
+void ctcm_chx_txidle(fsm_instance *fi, int event, void *arg);
+
+/*
+ * ----- FSM (state/event/action) of the ctcm channel statemachine -----
+ */
+extern const fsm_node ch_fsm[];
+extern int ch_fsm_len;
+
+
+/*
+ * ----- non-static actions for ctcmpc channel statemachine ----
+ *
+ */
+/* shared :
+void ctcm_chx_txidle(fsm_instance * fi, int event, void *arg);
+ */
+void ctcmpc_chx_rxidle(fsm_instance *fi, int event, void *arg);
+
+/*
+ * ----- FSM (state/event/action) of the ctcmpc channel statemachine -----
+ */
+extern const fsm_node ctcmpc_ch_fsm[];
+extern int mpc_ch_fsm_len;
+
+/*
+ * Definitions for the device interface statemachine for ctc and mpc
+ */
+
+/*
+ * States of the device interface statemachine.
+ */
+enum dev_states {
+ DEV_STATE_STOPPED,
+ DEV_STATE_STARTWAIT_RXTX,
+ DEV_STATE_STARTWAIT_RX,
+ DEV_STATE_STARTWAIT_TX,
+ DEV_STATE_STOPWAIT_RXTX,
+ DEV_STATE_STOPWAIT_RX,
+ DEV_STATE_STOPWAIT_TX,
+ DEV_STATE_RUNNING,
+ /*
+ * MUST be always the last element!!
+ */
+ CTCM_NR_DEV_STATES
+};
+
+extern const char *dev_state_names[];
+
+/*
+ * Events of the device interface statemachine.
+ * ctcm and ctcmpc
+ */
+enum dev_events {
+ DEV_EVENT_START,
+ DEV_EVENT_STOP,
+ DEV_EVENT_RXUP,
+ DEV_EVENT_TXUP,
+ DEV_EVENT_RXDOWN,
+ DEV_EVENT_TXDOWN,
+ DEV_EVENT_RESTART,
+ /*
+ * MUST be always the last element!!
+ */
+ CTCM_NR_DEV_EVENTS
+};
+
+extern const char *dev_event_names[];
+
+/*
+ * Actions for the device interface statemachine.
+ * ctc and ctcmpc
+ */
+/*
+static void dev_action_start(fsm_instance * fi, int event, void *arg);
+static void dev_action_stop(fsm_instance * fi, int event, void *arg);
+static void dev_action_restart(fsm_instance *fi, int event, void *arg);
+static void dev_action_chup(fsm_instance * fi, int event, void *arg);
+static void dev_action_chdown(fsm_instance * fi, int event, void *arg);
+*/
+
+/*
+ * The (state/event/action) fsm table of the device interface statemachine.
+ * ctcm and ctcmpc
+ */
+extern const fsm_node dev_fsm[];
+extern int dev_fsm_len;
+
+
+/*
+ * Definitions for the MPC Group statemachine
+ */
+
+/*
+ * MPC Group Station FSM States
+
+State Name When In This State
+====================== =======================================
+MPCG_STATE_RESET Initial State When Driver Loaded
+ We receive and send NOTHING
+
+MPCG_STATE_INOP INOP Received.
+ Group level non-recoverable error
+
+MPCG_STATE_READY XID exchanges for at least 1 write and
+ 1 read channel have completed.
+ Group is ready for data transfer.
+
+States from ctc_mpc_alloc_channel
+==============================================================
+MPCG_STATE_XID2INITW Awaiting XID2(0) Initiation
+ ATTN from other side will start
+ XID negotiations.
+ Y-side protocol only.
+
+MPCG_STATE_XID2INITX XID2(0) negotiations are in progress.
+ At least 1, but not all, XID2(0)'s
+ have been received from partner.
+
+MPCG_STATE_XID7INITW XID2(0) complete
+ No XID2(7)'s have yet been received.
+ XID2(7) negotiations pending.
+
+MPCG_STATE_XID7INITX XID2(7) negotiations in progress.
+ At least 1, but not all, XID2(7)'s
+ have been received from partner.
+
+MPCG_STATE_XID7INITF XID2(7) negotiations complete.
+ Transitioning to READY.
+
+MPCG_STATE_READY Ready for Data Transfer.
+
+
+States from ctc_mpc_establish_connectivity call
+==============================================================
+MPCG_STATE_XID0IOWAIT Initiating XID2(0) negotiations.
+ X-side protocol only.
+ ATTN-BUSY from other side will convert
+ this to Y-side protocol and the
+ ctc_mpc_alloc_channel flow will begin.
+
+MPCG_STATE_XID0IOWAIX XID2(0) negotiations are in progress.
+ At least 1, but not all, XID2(0)'s
+ have been received from partner.
+
+MPCG_STATE_XID7INITI XID2(0) complete
+ No XID2(7)'s have yet been received.
+ XID2(7) negotiations pending.
+
+MPCG_STATE_XID7INITZ XID2(7) negotiations in progress.
+ At least 1, but not all, XID2(7)'s
+ have been received from partner.
+
+MPCG_STATE_XID7INITF XID2(7) negotiations complete.
+ Transitioning to READY.
+
+MPCG_STATE_READY Ready for Data Transfer.
+
+*/
+
+enum mpcg_events {
+ MPCG_EVENT_INOP,
+ MPCG_EVENT_DISCONC,
+ MPCG_EVENT_XID0DO,
+ MPCG_EVENT_XID2,
+ MPCG_EVENT_XID2DONE,
+ MPCG_EVENT_XID7DONE,
+ MPCG_EVENT_TIMER,
+ MPCG_EVENT_DOIO,
+ MPCG_NR_EVENTS,
+};
+
+enum mpcg_states {
+ MPCG_STATE_RESET,
+ MPCG_STATE_INOP,
+ MPCG_STATE_XID2INITW,
+ MPCG_STATE_XID2INITX,
+ MPCG_STATE_XID7INITW,
+ MPCG_STATE_XID7INITX,
+ MPCG_STATE_XID0IOWAIT,
+ MPCG_STATE_XID0IOWAIX,
+ MPCG_STATE_XID7INITI,
+ MPCG_STATE_XID7INITZ,
+ MPCG_STATE_XID7INITF,
+ MPCG_STATE_FLOWC,
+ MPCG_STATE_READY,
+ MPCG_NR_STATES,
+};
+
+#endif
+/* --- This is the END my friend --- */
diff --git a/drivers/s390/net/ctcm_main.c b/drivers/s390/net/ctcm_main.c
new file mode 100644
index 0000000..d52843d
--- /dev/null
+++ b/drivers/s390/net/ctcm_main.c
@@ -0,0 +1,1772 @@
+/*
+ * drivers/s390/net/ctcm_main.c
+ *
+ * Copyright IBM Corp. 2001, 2007
+ * Author(s):
+ * Original CTC driver(s):
+ * Fritz Elfert (felfert@millenux.com)
+ * Dieter Wellerdiek (wel@de.ibm.com)
+ * Martin Schwidefsky (schwidefsky@de.ibm.com)
+ * Denis Joseph Barrow (barrow_dj@yahoo.com)
+ * Jochen Roehrig (roehrig@de.ibm.com)
+ * Cornelia Huck <cornelia.huck@de.ibm.com>
+ * MPC additions:
+ * Belinda Thompson (belindat@us.ibm.com)
+ * Andy Richter (richtera@us.ibm.com)
+ * Revived by:
+ * Peter Tiedemann (ptiedem@de.ibm.com)
+ */
+
+#undef DEBUG
+#undef DEBUGDATA
+#undef DEBUGCCW
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/bitops.h>
+
+#include <linux/signal.h>
+#include <linux/string.h>
+
+#include <linux/ip.h>
+#include <linux/if_arp.h>
+#include <linux/tcp.h>
+#include <linux/skbuff.h>
+#include <linux/ctype.h>
+#include <net/dst.h>
+
+#include <linux/io.h>
+#include <asm/ccwdev.h>
+#include <asm/ccwgroup.h>
+#include <linux/uaccess.h>
+
+#include <asm/idals.h>
+
+#include "cu3088.h"
+#include "ctcm_fsms.h"
+#include "ctcm_main.h"
+
+/* Some common global variables */
+
+/*
+ * Linked list of all detected channels.
+ */
+struct channel *channels;
+
+/**
+ * Unpack a just received skb and hand it over to
+ * upper layers.
+ *
+ * ch The channel where this skb has been received.
+ * pskb The received skb.
+ */
+void ctcm_unpack_skb(struct channel *ch, struct sk_buff *pskb)
+{
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ __u16 len = *((__u16 *) pskb->data);
+
+ skb_put(pskb, 2 + LL_HEADER_LENGTH);
+ skb_pull(pskb, 2);
+ pskb->dev = dev;
+ pskb->ip_summed = CHECKSUM_UNNECESSARY;
+ while (len > 0) {
+ struct sk_buff *skb;
+ int skblen;
+ struct ll_header *header = (struct ll_header *)pskb->data;
+
+ skb_pull(pskb, LL_HEADER_LENGTH);
+ if ((ch->protocol == CTCM_PROTO_S390) &&
+ (header->type != ETH_P_IP)) {
+
+ if (!(ch->logflags & LOG_FLAG_ILLEGALPKT)) {
+ /*
+ * Check packet type only if we stick strictly
+ * to S/390's protocol of OS390. This only
+ * supports IP. Otherwise allow any packet
+ * type.
+ */
+ ctcm_pr_warn("%s Illegal packet type 0x%04x "
+ "received, dropping\n",
+ dev->name, header->type);
+ ch->logflags |= LOG_FLAG_ILLEGALPKT;
+ }
+
+ priv->stats.rx_dropped++;
+ priv->stats.rx_frame_errors++;
+ return;
+ }
+ pskb->protocol = ntohs(header->type);
+ if (header->length <= LL_HEADER_LENGTH) {
+ if (!(ch->logflags & LOG_FLAG_ILLEGALSIZE)) {
+ ctcm_pr_warn(
+ "%s Illegal packet size %d "
+ "received (MTU=%d blocklen=%d), "
+ "dropping\n", dev->name, header->length,
+ dev->mtu, len);
+ ch->logflags |= LOG_FLAG_ILLEGALSIZE;
+ }
+
+ priv->stats.rx_dropped++;
+ priv->stats.rx_length_errors++;
+ return;
+ }
+ header->length -= LL_HEADER_LENGTH;
+ len -= LL_HEADER_LENGTH;
+ if ((header->length > skb_tailroom(pskb)) ||
+ (header->length > len)) {
+ if (!(ch->logflags & LOG_FLAG_OVERRUN)) {
+ ctcm_pr_warn(
+ "%s Illegal packet size %d (beyond the"
+ " end of received data), dropping\n",
+ dev->name, header->length);
+ ch->logflags |= LOG_FLAG_OVERRUN;
+ }
+
+ priv->stats.rx_dropped++;
+ priv->stats.rx_length_errors++;
+ return;
+ }
+ skb_put(pskb, header->length);
+ skb_reset_mac_header(pskb);
+ len -= header->length;
+ skb = dev_alloc_skb(pskb->len);
+ if (!skb) {
+ if (!(ch->logflags & LOG_FLAG_NOMEM)) {
+ ctcm_pr_warn(
+ "%s Out of memory in ctcm_unpack_skb\n",
+ dev->name);
+ ch->logflags |= LOG_FLAG_NOMEM;
+ }
+ priv->stats.rx_dropped++;
+ return;
+ }
+ skb_copy_from_linear_data(pskb, skb_put(skb, pskb->len),
+ pskb->len);
+ skb_reset_mac_header(skb);
+ skb->dev = pskb->dev;
+ skb->protocol = pskb->protocol;
+ pskb->ip_summed = CHECKSUM_UNNECESSARY;
+ skblen = skb->len;
+ /*
+ * reset logflags
+ */
+ ch->logflags = 0;
+ priv->stats.rx_packets++;
+ priv->stats.rx_bytes += skblen;
+ netif_rx_ni(skb);
+ dev->last_rx = jiffies;
+ if (len > 0) {
+ skb_pull(pskb, header->length);
+ if (skb_tailroom(pskb) < LL_HEADER_LENGTH) {
+ if (!(ch->logflags & LOG_FLAG_OVERRUN)) {
+ CTCM_DBF_DEV_NAME(TRACE, dev,
+ "Overrun in ctcm_unpack_skb");
+ ch->logflags |= LOG_FLAG_OVERRUN;
+ }
+ return;
+ }
+ skb_put(pskb, LL_HEADER_LENGTH);
+ }
+ }
+}
+
+/**
+ * Release a specific channel in the channel list.
+ *
+ * ch Pointer to channel struct to be released.
+ */
+static void channel_free(struct channel *ch)
+{
+ CTCM_DBF_TEXT(TRACE, 2, __FUNCTION__);
+ ch->flags &= ~CHANNEL_FLAGS_INUSE;
+ fsm_newstate(ch->fsm, CTC_STATE_IDLE);
+}
+
+/**
+ * Remove a specific channel in the channel list.
+ *
+ * ch Pointer to channel struct to be released.
+ */
+static void channel_remove(struct channel *ch)
+{
+ struct channel **c = &channels;
+ char chid[CTCM_ID_SIZE+1];
+ int ok = 0;
+
+ if (ch == NULL)
+ return;
+ else
+ strncpy(chid, ch->id, CTCM_ID_SIZE);
+
+ channel_free(ch);
+ while (*c) {
+ if (*c == ch) {
+ *c = ch->next;
+ fsm_deltimer(&ch->timer);
+ if (IS_MPC(ch))
+ fsm_deltimer(&ch->sweep_timer);
+
+ kfree_fsm(ch->fsm);
+ clear_normalized_cda(&ch->ccw[4]);
+ if (ch->trans_skb != NULL) {
+ clear_normalized_cda(&ch->ccw[1]);
+ dev_kfree_skb_any(ch->trans_skb);
+ }
+ if (IS_MPC(ch)) {
+ tasklet_kill(&ch->ch_tasklet);
+ tasklet_kill(&ch->ch_disc_tasklet);
+ kfree(ch->discontact_th);
+ }
+ kfree(ch->ccw);
+ kfree(ch->irb);
+ kfree(ch);
+ ok = 1;
+ break;
+ }
+ c = &((*c)->next);
+ }
+
+ CTCM_DBF_TEXT_(SETUP, CTC_DBF_INFO, "%s(%s) %s", CTCM_FUNTAIL,
+ chid, ok ? "OK" : "failed");
+}
+
+/**
+ * Get a specific channel from the channel list.
+ *
+ * type Type of channel we are interested in.
+ * id Id of channel we are interested in.
+ * direction Direction we want to use this channel for.
+ *
+ * returns Pointer to a channel or NULL if no matching channel available.
+ */
+static struct channel *channel_get(enum channel_types type,
+ char *id, int direction)
+{
+ struct channel *ch = channels;
+
+ if (do_debug) {
+ char buf[64];
+ sprintf(buf, "%s(%d, %s, %d)\n",
+ CTCM_FUNTAIL, type, id, direction);
+ CTCM_DBF_TEXT(TRACE, CTC_DBF_INFO, buf);
+ }
+ while (ch && (strncmp(ch->id, id, CTCM_ID_SIZE) || (ch->type != type)))
+ ch = ch->next;
+ if (!ch) {
+ char buf[64];
+ sprintf(buf, "%s(%d, %s, %d) not found in channel list\n",
+ CTCM_FUNTAIL, type, id, direction);
+ CTCM_DBF_TEXT(ERROR, CTC_DBF_ERROR, buf);
+ } else {
+ if (ch->flags & CHANNEL_FLAGS_INUSE)
+ ch = NULL;
+ else {
+ ch->flags |= CHANNEL_FLAGS_INUSE;
+ ch->flags &= ~CHANNEL_FLAGS_RWMASK;
+ ch->flags |= (direction == WRITE)
+ ? CHANNEL_FLAGS_WRITE : CHANNEL_FLAGS_READ;
+ fsm_newstate(ch->fsm, CTC_STATE_STOPPED);
+ }
+ }
+ return ch;
+}
+
+static long ctcm_check_irb_error(struct ccw_device *cdev, struct irb *irb)
+{
+ if (!IS_ERR(irb))
+ return 0;
+
+ CTCM_DBF_TEXT_(ERROR, CTC_DBF_WARN, "irb error %ld on device %s\n",
+ PTR_ERR(irb), cdev->dev.bus_id);
+
+ switch (PTR_ERR(irb)) {
+ case -EIO:
+ ctcm_pr_warn("i/o-error on device %s\n", cdev->dev.bus_id);
+ break;
+ case -ETIMEDOUT:
+ ctcm_pr_warn("timeout on device %s\n", cdev->dev.bus_id);
+ break;
+ default:
+ ctcm_pr_warn("unknown error %ld on device %s\n",
+ PTR_ERR(irb), cdev->dev.bus_id);
+ }
+ return PTR_ERR(irb);
+}
+
+
+/**
+ * Check sense of a unit check.
+ *
+ * ch The channel, the sense code belongs to.
+ * sense The sense code to inspect.
+ */
+static inline void ccw_unit_check(struct channel *ch, unsigned char sense)
+{
+ CTCM_DBF_TEXT(TRACE, 5, __FUNCTION__);
+ if (sense & SNS0_INTERVENTION_REQ) {
+ if (sense & 0x01) {
+ ctcm_pr_debug("%s: Interface disc. or Sel. reset "
+ "(remote)\n", ch->id);
+ fsm_event(ch->fsm, CTC_EVENT_UC_RCRESET, ch);
+ } else {
+ ctcm_pr_debug("%s: System reset (remote)\n", ch->id);
+ fsm_event(ch->fsm, CTC_EVENT_UC_RSRESET, ch);
+ }
+ } else if (sense & SNS0_EQUIPMENT_CHECK) {
+ if (sense & SNS0_BUS_OUT_CHECK) {
+ ctcm_pr_warn("%s: Hardware malfunction (remote)\n",
+ ch->id);
+ fsm_event(ch->fsm, CTC_EVENT_UC_HWFAIL, ch);
+ } else {
+ ctcm_pr_warn("%s: Read-data parity error (remote)\n",
+ ch->id);
+ fsm_event(ch->fsm, CTC_EVENT_UC_RXPARITY, ch);
+ }
+ } else if (sense & SNS0_BUS_OUT_CHECK) {
+ if (sense & 0x04) {
+ ctcm_pr_warn("%s: Data-streaming timeout)\n", ch->id);
+ fsm_event(ch->fsm, CTC_EVENT_UC_TXTIMEOUT, ch);
+ } else {
+ ctcm_pr_warn("%s: Data-transfer parity error\n",
+ ch->id);
+ fsm_event(ch->fsm, CTC_EVENT_UC_TXPARITY, ch);
+ }
+ } else if (sense & SNS0_CMD_REJECT) {
+ ctcm_pr_warn("%s: Command reject\n", ch->id);
+ } else if (sense == 0) {
+ ctcm_pr_debug("%s: Unit check ZERO\n", ch->id);
+ fsm_event(ch->fsm, CTC_EVENT_UC_ZERO, ch);
+ } else {
+ ctcm_pr_warn("%s: Unit Check with sense code: %02x\n",
+ ch->id, sense);
+ fsm_event(ch->fsm, CTC_EVENT_UC_UNKNOWN, ch);
+ }
+}
+
+int ctcm_ch_alloc_buffer(struct channel *ch)
+{
+ CTCM_DBF_TEXT(TRACE, 5, __FUNCTION__);
+
+ clear_normalized_cda(&ch->ccw[1]);
+ ch->trans_skb = __dev_alloc_skb(ch->max_bufsize, GFP_ATOMIC | GFP_DMA);
+ if (ch->trans_skb == NULL) {
+ ctcm_pr_warn("%s: Couldn't alloc %s trans_skb\n",
+ ch->id,
+ (CHANNEL_DIRECTION(ch->flags) == READ) ? "RX" : "TX");
+ return -ENOMEM;
+ }
+
+ ch->ccw[1].count = ch->max_bufsize;
+ if (set_normalized_cda(&ch->ccw[1], ch->trans_skb->data)) {
+ dev_kfree_skb(ch->trans_skb);
+ ch->trans_skb = NULL;
+ ctcm_pr_warn("%s: set_normalized_cda for %s "
+ "trans_skb failed, dropping packets\n",
+ ch->id,
+ (CHANNEL_DIRECTION(ch->flags) == READ) ? "RX" : "TX");
+ return -ENOMEM;
+ }
+
+ ch->ccw[1].count = 0;
+ ch->trans_skb_data = ch->trans_skb->data;
+ ch->flags &= ~CHANNEL_FLAGS_BUFSIZE_CHANGED;
+ return 0;
+}
+
+/*
+ * Interface API for upper network layers
+ */
+
+/**
+ * Open an interface.
+ * Called from generic network layer when ifconfig up is run.
+ *
+ * dev Pointer to interface struct.
+ *
+ * returns 0 on success, -ERRNO on failure. (Never fails.)
+ */
+int ctcm_open(struct net_device *dev)
+{
+ struct ctcm_priv *priv = dev->priv;
+
+ CTCMY_DBF_DEV_NAME(SETUP, dev, "");
+ if (!IS_MPC(priv))
+ fsm_event(priv->fsm, DEV_EVENT_START, dev);
+ return 0;
+}
+
+/**
+ * Close an interface.
+ * Called from generic network layer when ifconfig down is run.
+ *
+ * dev Pointer to interface struct.
+ *
+ * returns 0 on success, -ERRNO on failure. (Never fails.)
+ */
+int ctcm_close(struct net_device *dev)
+{
+ struct ctcm_priv *priv = dev->priv;
+
+ CTCMY_DBF_DEV_NAME(SETUP, dev, "");
+ if (!IS_MPC(priv))
+ fsm_event(priv->fsm, DEV_EVENT_STOP, dev);
+ return 0;
+}
+
+
+/**
+ * Transmit a packet.
+ * This is a helper function for ctcm_tx().
+ *
+ * ch Channel to be used for sending.
+ * skb Pointer to struct sk_buff of packet to send.
+ * The linklevel header has already been set up
+ * by ctcm_tx().
+ *
+ * returns 0 on success, -ERRNO on failure. (Never fails.)
+ */
+static int ctcm_transmit_skb(struct channel *ch, struct sk_buff *skb)
+{
+ unsigned long saveflags;
+ struct ll_header header;
+ int rc = 0;
+ __u16 block_len;
+ int ccw_idx;
+ struct sk_buff *nskb;
+ unsigned long hi;
+
+ /* we need to acquire the lock for testing the state
+ * otherwise we can have an IRQ changing the state to
+ * TXIDLE after the test but before acquiring the lock.
+ */
+ spin_lock_irqsave(&ch->collect_lock, saveflags);
+ if (fsm_getstate(ch->fsm) != CTC_STATE_TXIDLE) {
+ int l = skb->len + LL_HEADER_LENGTH;
+
+ if (ch->collect_len + l > ch->max_bufsize - 2) {
+ spin_unlock_irqrestore(&ch->collect_lock, saveflags);
+ return -EBUSY;
+ } else {
+ atomic_inc(&skb->users);
+ header.length = l;
+ header.type = skb->protocol;
+ header.unused = 0;
+ memcpy(skb_push(skb, LL_HEADER_LENGTH), &header,
+ LL_HEADER_LENGTH);
+ skb_queue_tail(&ch->collect_queue, skb);
+ ch->collect_len += l;
+ }
+ spin_unlock_irqrestore(&ch->collect_lock, saveflags);
+ goto done;
+ }
+ spin_unlock_irqrestore(&ch->collect_lock, saveflags);
+ /*
+ * Protect skb against beeing free'd by upper
+ * layers.
+ */
+ atomic_inc(&skb->users);
+ ch->prof.txlen += skb->len;
+ header.length = skb->len + LL_HEADER_LENGTH;
+ header.type = skb->protocol;
+ header.unused = 0;
+ memcpy(skb_push(skb, LL_HEADER_LENGTH), &header, LL_HEADER_LENGTH);
+ block_len = skb->len + 2;
+ *((__u16 *)skb_push(skb, 2)) = block_len;
+
+ /*
+ * IDAL support in CTCM is broken, so we have to
+ * care about skb's above 2G ourselves.
+ */
+ hi = ((unsigned long)skb_tail_pointer(skb) + LL_HEADER_LENGTH) >> 31;
+ if (hi) {
+ nskb = alloc_skb(skb->len, GFP_ATOMIC | GFP_DMA);
+ if (!nskb) {
+ atomic_dec(&skb->users);
+ skb_pull(skb, LL_HEADER_LENGTH + 2);
+ ctcm_clear_busy(ch->netdev);
+ return -ENOMEM;
+ } else {
+ memcpy(skb_put(nskb, skb->len), skb->data, skb->len);
+ atomic_inc(&nskb->users);
+ atomic_dec(&skb->users);
+ dev_kfree_skb_irq(skb);
+ skb = nskb;
+ }
+ }
+
+ ch->ccw[4].count = block_len;
+ if (set_normalized_cda(&ch->ccw[4], skb->data)) {
+ /*
+ * idal allocation failed, try via copying to
+ * trans_skb. trans_skb usually has a pre-allocated
+ * idal.
+ */
+ if (ctcm_checkalloc_buffer(ch)) {
+ /*
+ * Remove our header. It gets added
+ * again on retransmit.
+ */
+ atomic_dec(&skb->users);
+ skb_pull(skb, LL_HEADER_LENGTH + 2);
+ ctcm_clear_busy(ch->netdev);
+ return -EBUSY;
+ }
+
+ skb_reset_tail_pointer(ch->trans_skb);
+ ch->trans_skb->len = 0;
+ ch->ccw[1].count = skb->len;
+ skb_copy_from_linear_data(skb,
+ skb_put(ch->trans_skb, skb->len), skb->len);
+ atomic_dec(&skb->users);
+ dev_kfree_skb_irq(skb);
+ ccw_idx = 0;
+ } else {
+ skb_queue_tail(&ch->io_queue, skb);
+ ccw_idx = 3;
+ }
+ ch->retry = 0;
+ fsm_newstate(ch->fsm, CTC_STATE_TX);
+ fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
+ spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
+ ch->prof.send_stamp = current_kernel_time(); /* xtime */
+ rc = ccw_device_start(ch->cdev, &ch->ccw[ccw_idx],
+ (unsigned long)ch, 0xff, 0);
+ spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
+ if (ccw_idx == 3)
+ ch->prof.doios_single++;
+ if (rc != 0) {
+ fsm_deltimer(&ch->timer);
+ ctcm_ccw_check_rc(ch, rc, "single skb TX");
+ if (ccw_idx == 3)
+ skb_dequeue_tail(&ch->io_queue);
+ /*
+ * Remove our header. It gets added
+ * again on retransmit.
+ */
+ skb_pull(skb, LL_HEADER_LENGTH + 2);
+ } else if (ccw_idx == 0) {
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ priv->stats.tx_packets++;
+ priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH;
+ }
+done:
+ ctcm_clear_busy(ch->netdev);
+ return rc;
+}
+
+static void ctcmpc_send_sweep_req(struct channel *rch)
+{
+ struct net_device *dev = rch->netdev;
+ struct ctcm_priv *priv;
+ struct mpc_group *grp;
+ struct th_sweep *header;
+ struct sk_buff *sweep_skb;
+ struct channel *ch;
+ int rc = 0;
+
+ priv = dev->priv;
+ grp = priv->mpcg;
+ ch = priv->channel[WRITE];
+
+ if (do_debug)
+ MPC_DBF_DEV_NAME(TRACE, dev, ch->id);
+
+ /* sweep processing is not complete until response and request */
+ /* has completed for all read channels in group */
+ if (grp->in_sweep == 0) {
+ grp->in_sweep = 1;
+ grp->sweep_rsp_pend_num = grp->active_channels[READ];
+ grp->sweep_req_pend_num = grp->active_channels[READ];
+ }
+
+ sweep_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC|GFP_DMA);
+
+ if (sweep_skb == NULL) {
+ printk(KERN_INFO "Couldn't alloc sweep_skb\n");
+ rc = -ENOMEM;
+ goto done;
+ }
+
+ header = kmalloc(TH_SWEEP_LENGTH, gfp_type());
+
+ if (!header) {
+ dev_kfree_skb_any(sweep_skb);
+ rc = -ENOMEM;
+ goto done;
+ }
+
+ header->th.th_seg = 0x00 ;
+ header->th.th_ch_flag = TH_SWEEP_REQ; /* 0x0f */
+ header->th.th_blk_flag = 0x00;
+ header->th.th_is_xid = 0x00;
+ header->th.th_seq_num = 0x00;
+ header->sw.th_last_seq = ch->th_seq_num;
+
+ memcpy(skb_put(sweep_skb, TH_SWEEP_LENGTH), header, TH_SWEEP_LENGTH);
+
+ kfree(header);
+
+ dev->trans_start = jiffies;
+ skb_queue_tail(&ch->sweep_queue, sweep_skb);
+
+ fsm_addtimer(&ch->sweep_timer, 100, CTC_EVENT_RSWEEP_TIMER, ch);
+
+ return;
+
+done:
+ if (rc != 0) {
+ grp->in_sweep = 0;
+ ctcm_clear_busy(dev);
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ }
+
+ return;
+}
+
+/*
+ * MPC mode version of transmit_skb
+ */
+static int ctcmpc_transmit_skb(struct channel *ch, struct sk_buff *skb)
+{
+ struct pdu *p_header;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+ struct th_header *header;
+ struct sk_buff *nskb;
+ int rc = 0;
+ int ccw_idx;
+ unsigned long hi;
+ unsigned long saveflags = 0; /* avoids compiler warning */
+ __u16 block_len;
+
+ if (do_debug)
+ ctcm_pr_debug(
+ "ctcm enter: %s(): %s cp=%i ch=0x%p id=%s state=%s\n",
+ __FUNCTION__, dev->name, smp_processor_id(), ch,
+ ch->id, fsm_getstate_str(ch->fsm));
+
+ if ((fsm_getstate(ch->fsm) != CTC_STATE_TXIDLE) || grp->in_sweep) {
+ spin_lock_irqsave(&ch->collect_lock, saveflags);
+ atomic_inc(&skb->users);
+ p_header = kmalloc(PDU_HEADER_LENGTH, gfp_type());
+
+ if (!p_header) {
+ printk(KERN_WARNING "ctcm: OUT OF MEMORY IN %s():"
+ " Data Lost \n", __FUNCTION__);
+
+ atomic_dec(&skb->users);
+ dev_kfree_skb_any(skb);
+ spin_unlock_irqrestore(&ch->collect_lock, saveflags);
+ fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
+ goto done;
+ }
+
+ p_header->pdu_offset = skb->len;
+ p_header->pdu_proto = 0x01;
+ p_header->pdu_flag = 0x00;
+ if (skb->protocol == ntohs(ETH_P_SNAP)) {
+ p_header->pdu_flag |= PDU_FIRST | PDU_CNTL;
+ } else {
+ p_header->pdu_flag |= PDU_FIRST;
+ }
+ p_header->pdu_seq = 0;
+ memcpy(skb_push(skb, PDU_HEADER_LENGTH), p_header,
+ PDU_HEADER_LENGTH);
+
+ if (do_debug_data) {
+ ctcm_pr_debug("ctcm: %s() Putting on collect_q"
+ " - skb len: %04x \n", __FUNCTION__, skb->len);
+ ctcm_pr_debug("ctcm: %s() pdu header and data"
+ " for up to 32 bytes\n", __FUNCTION__);
+ ctcmpc_dump32((char *)skb->data, skb->len);
+ }
+
+ skb_queue_tail(&ch->collect_queue, skb);
+ ch->collect_len += skb->len;
+ kfree(p_header);
+
+ spin_unlock_irqrestore(&ch->collect_lock, saveflags);
+ goto done;
+ }
+
+ /*
+ * Protect skb against beeing free'd by upper
+ * layers.
+ */
+ atomic_inc(&skb->users);
+
+ block_len = skb->len + TH_HEADER_LENGTH + PDU_HEADER_LENGTH;
+ /*
+ * IDAL support in CTCM is broken, so we have to
+ * care about skb's above 2G ourselves.
+ */
+ hi = ((unsigned long)skb->tail + TH_HEADER_LENGTH) >> 31;
+ if (hi) {
+ nskb = __dev_alloc_skb(skb->len, GFP_ATOMIC | GFP_DMA);
+ if (!nskb) {
+ printk(KERN_WARNING "ctcm: %s() OUT OF MEMORY"
+ "- Data Lost \n", __FUNCTION__);
+ atomic_dec(&skb->users);
+ dev_kfree_skb_any(skb);
+ fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
+ goto done;
+ } else {
+ memcpy(skb_put(nskb, skb->len), skb->data, skb->len);
+ atomic_inc(&nskb->users);
+ atomic_dec(&skb->users);
+ dev_kfree_skb_irq(skb);
+ skb = nskb;
+ }
+ }
+
+ p_header = kmalloc(PDU_HEADER_LENGTH, gfp_type());
+
+ if (!p_header) {
+ printk(KERN_WARNING "ctcm: %s() OUT OF MEMORY"
+ ": Data Lost \n", __FUNCTION__);
+
+ atomic_dec(&skb->users);
+ dev_kfree_skb_any(skb);
+ fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
+ goto done;
+ }
+
+ p_header->pdu_offset = skb->len;
+ p_header->pdu_proto = 0x01;
+ p_header->pdu_flag = 0x00;
+ p_header->pdu_seq = 0;
+ if (skb->protocol == ntohs(ETH_P_SNAP)) {
+ p_header->pdu_flag |= PDU_FIRST | PDU_CNTL;
+ } else {
+ p_header->pdu_flag |= PDU_FIRST;
+ }
+ memcpy(skb_push(skb, PDU_HEADER_LENGTH), p_header, PDU_HEADER_LENGTH);
+
+ kfree(p_header);
+
+ if (ch->collect_len > 0) {
+ spin_lock_irqsave(&ch->collect_lock, saveflags);
+ skb_queue_tail(&ch->collect_queue, skb);
+ ch->collect_len += skb->len;
+ skb = skb_dequeue(&ch->collect_queue);
+ ch->collect_len -= skb->len;
+ spin_unlock_irqrestore(&ch->collect_lock, saveflags);
+ }
+
+ p_header = (struct pdu *)skb->data;
+ p_header->pdu_flag |= PDU_LAST;
+
+ ch->prof.txlen += skb->len - PDU_HEADER_LENGTH;
+
+ header = kmalloc(TH_HEADER_LENGTH, gfp_type());
+
+ if (!header) {
+ printk(KERN_WARNING "ctcm: %s() OUT OF MEMORY: Data Lost \n",
+ __FUNCTION__);
+ atomic_dec(&skb->users);
+ dev_kfree_skb_any(skb);
+ fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
+ goto done;
+ }
+
+ header->th_seg = 0x00;
+ header->th_ch_flag = TH_HAS_PDU; /* Normal data */
+ header->th_blk_flag = 0x00;
+ header->th_is_xid = 0x00; /* Just data here */
+ ch->th_seq_num++;
+ header->th_seq_num = ch->th_seq_num;
+
+ if (do_debug_data)
+ ctcm_pr_debug("ctcm: %s() ToVTAM_th_seq= %08x\n" ,
+ __FUNCTION__, ch->th_seq_num);
+
+ /* put the TH on the packet */
+ memcpy(skb_push(skb, TH_HEADER_LENGTH), header, TH_HEADER_LENGTH);
+
+ kfree(header);
+
+ if (do_debug_data) {
+ ctcm_pr_debug("ctcm: %s(): skb len: %04x \n",
+ __FUNCTION__, skb->len);
+ ctcm_pr_debug("ctcm: %s(): pdu header and data for up to 32 "
+ "bytes sent to vtam\n", __FUNCTION__);
+ ctcmpc_dump32((char *)skb->data, skb->len);
+ }
+
+ ch->ccw[4].count = skb->len;
+ if (set_normalized_cda(&ch->ccw[4], skb->data)) {
+ /*
+ * idal allocation failed, try via copying to
+ * trans_skb. trans_skb usually has a pre-allocated
+ * idal.
+ */
+ if (ctcm_checkalloc_buffer(ch)) {
+ /*
+ * Remove our header. It gets added
+ * again on retransmit.
+ */
+ atomic_dec(&skb->users);
+ dev_kfree_skb_any(skb);
+ printk(KERN_WARNING "ctcm: %s()OUT OF MEMORY:"
+ " Data Lost \n", __FUNCTION__);
+ fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
+ goto done;
+ }
+
+ skb_reset_tail_pointer(ch->trans_skb);
+ ch->trans_skb->len = 0;
+ ch->ccw[1].count = skb->len;
+ memcpy(skb_put(ch->trans_skb, skb->len), skb->data, skb->len);
+ atomic_dec(&skb->users);
+ dev_kfree_skb_irq(skb);
+ ccw_idx = 0;
+ if (do_debug_data) {
+ ctcm_pr_debug("ctcm: %s() TRANS skb len: %d \n",
+ __FUNCTION__, ch->trans_skb->len);
+ ctcm_pr_debug("ctcm: %s up to 32 bytes of data"
+ " sent to vtam\n", __FUNCTION__);
+ ctcmpc_dump32((char *)ch->trans_skb->data,
+ ch->trans_skb->len);
+ }
+ } else {
+ skb_queue_tail(&ch->io_queue, skb);
+ ccw_idx = 3;
+ }
+ ch->retry = 0;
+ fsm_newstate(ch->fsm, CTC_STATE_TX);
+ fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
+
+ if (do_debug_ccw)
+ ctcmpc_dumpit((char *)&ch->ccw[ccw_idx],
+ sizeof(struct ccw1) * 3);
+
+ spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
+ ch->prof.send_stamp = current_kernel_time(); /* xtime */
+ rc = ccw_device_start(ch->cdev, &ch->ccw[ccw_idx],
+ (unsigned long)ch, 0xff, 0);
+ spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
+ if (ccw_idx == 3)
+ ch->prof.doios_single++;
+ if (rc != 0) {
+ fsm_deltimer(&ch->timer);
+ ctcm_ccw_check_rc(ch, rc, "single skb TX");
+ if (ccw_idx == 3)
+ skb_dequeue_tail(&ch->io_queue);
+ } else if (ccw_idx == 0) {
+ priv->stats.tx_packets++;
+ priv->stats.tx_bytes += skb->len - TH_HEADER_LENGTH;
+ }
+ if (ch->th_seq_num > 0xf0000000) /* Chose 4Billion at random. */
+ ctcmpc_send_sweep_req(ch);
+
+done:
+ if (do_debug)
+ ctcm_pr_debug("ctcm exit: %s %s()\n", dev->name, __FUNCTION__);
+ return 0;
+}
+
+/**
+ * Start transmission of a packet.
+ * Called from generic network device layer.
+ *
+ * skb Pointer to buffer containing the packet.
+ * dev Pointer to interface struct.
+ *
+ * returns 0 if packet consumed, !0 if packet rejected.
+ * Note: If we return !0, then the packet is free'd by
+ * the generic network layer.
+ */
+/* first merge version - leaving both functions separated */
+static int ctcm_tx(struct sk_buff *skb, struct net_device *dev)
+{
+ int rc = 0;
+ struct ctcm_priv *priv;
+
+ CTCM_DBF_TEXT(TRACE, 5, __FUNCTION__);
+ priv = dev->priv;
+
+ if (skb == NULL) {
+ ctcm_pr_warn("%s: NULL sk_buff passed\n", dev->name);
+ priv->stats.tx_dropped++;
+ return 0;
+ }
+ if (skb_headroom(skb) < (LL_HEADER_LENGTH + 2)) {
+ ctcm_pr_warn("%s: Got sk_buff with head room < %ld bytes\n",
+ dev->name, LL_HEADER_LENGTH + 2);
+ dev_kfree_skb(skb);
+ priv->stats.tx_dropped++;
+ return 0;
+ }
+
+ /*
+ * If channels are not running, try to restart them
+ * and throw away packet.
+ */
+ if (fsm_getstate(priv->fsm) != DEV_STATE_RUNNING) {
+ fsm_event(priv->fsm, DEV_EVENT_START, dev);
+ dev_kfree_skb(skb);
+ priv->stats.tx_dropped++;
+ priv->stats.tx_errors++;
+ priv->stats.tx_carrier_errors++;
+ return 0;
+ }
+
+ if (ctcm_test_and_set_busy(dev))
+ return -EBUSY;
+
+ dev->trans_start = jiffies;
+ if (ctcm_transmit_skb(priv->channel[WRITE], skb) != 0)
+ rc = 1;
+ return rc;
+}
+
+/* unmerged MPC variant of ctcm_tx */
+static int ctcmpc_tx(struct sk_buff *skb, struct net_device *dev)
+{
+ int len = 0;
+ struct ctcm_priv *priv = NULL;
+ struct mpc_group *grp = NULL;
+ struct sk_buff *newskb = NULL;
+
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc enter: %s(): skb:%0lx\n",
+ __FUNCTION__, (unsigned long)skb);
+
+ CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
+ "ctcmpc enter: %s(): skb:%0lx\n",
+ __FUNCTION__, (unsigned long)skb);
+
+ priv = dev->priv;
+ grp = priv->mpcg;
+ /*
+ * Some sanity checks ...
+ */
+ if (skb == NULL) {
+ ctcm_pr_warn("ctcmpc: %s: NULL sk_buff passed\n", dev->name);
+ priv->stats.tx_dropped++;
+ goto done;
+ }
+ if (skb_headroom(skb) < (TH_HEADER_LENGTH + PDU_HEADER_LENGTH)) {
+ CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_WARN,
+ "%s: Got sk_buff with head room < %ld bytes\n",
+ dev->name, TH_HEADER_LENGTH + PDU_HEADER_LENGTH);
+
+ if (do_debug_data)
+ ctcmpc_dump32((char *)skb->data, skb->len);
+
+ len = skb->len + TH_HEADER_LENGTH + PDU_HEADER_LENGTH;
+ newskb = __dev_alloc_skb(len, gfp_type() | GFP_DMA);
+
+ if (!newskb) {
+ printk(KERN_WARNING "ctcmpc: %s() OUT OF MEMORY-"
+ "Data Lost\n",
+ __FUNCTION__);
+
+ dev_kfree_skb_any(skb);
+ priv->stats.tx_dropped++;
+ priv->stats.tx_errors++;
+ priv->stats.tx_carrier_errors++;
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ goto done;
+ }
+ newskb->protocol = skb->protocol;
+ skb_reserve(newskb, TH_HEADER_LENGTH + PDU_HEADER_LENGTH);
+ memcpy(skb_put(newskb, skb->len), skb->data, skb->len);
+ dev_kfree_skb_any(skb);
+ skb = newskb;
+ }
+
+ /*
+ * If channels are not running,
+ * notify anybody about a link failure and throw
+ * away packet.
+ */
+ if ((fsm_getstate(priv->fsm) != DEV_STATE_RUNNING) ||
+ (fsm_getstate(grp->fsm) < MPCG_STATE_XID2INITW)) {
+ dev_kfree_skb_any(skb);
+ printk(KERN_INFO "ctcmpc: %s() DATA RCVD - MPC GROUP "
+ "NOT ACTIVE - DROPPED\n",
+ __FUNCTION__);
+ priv->stats.tx_dropped++;
+ priv->stats.tx_errors++;
+ priv->stats.tx_carrier_errors++;
+ goto done;
+ }
+
+ if (ctcm_test_and_set_busy(dev)) {
+ printk(KERN_WARNING "%s:DEVICE ERR - UNRECOVERABLE DATA LOSS\n",
+ __FUNCTION__);
+ dev_kfree_skb_any(skb);
+ priv->stats.tx_dropped++;
+ priv->stats.tx_errors++;
+ priv->stats.tx_carrier_errors++;
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ goto done;
+ }
+
+ dev->trans_start = jiffies;
+ if (ctcmpc_transmit_skb(priv->channel[WRITE], skb) != 0) {
+ printk(KERN_WARNING "ctcmpc: %s() DEVICE ERROR"
+ ": Data Lost \n",
+ __FUNCTION__);
+ printk(KERN_WARNING "ctcmpc: %s() DEVICE ERROR"
+ " - UNRECOVERABLE DATA LOSS\n",
+ __FUNCTION__);
+ dev_kfree_skb_any(skb);
+ priv->stats.tx_dropped++;
+ priv->stats.tx_errors++;
+ priv->stats.tx_carrier_errors++;
+ ctcm_clear_busy(dev);
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ goto done;
+ }
+ ctcm_clear_busy(dev);
+done:
+ if (do_debug)
+ MPC_DBF_DEV_NAME(TRACE, dev, "exit");
+
+ return 0; /* handle freeing of skb here */
+}
+
+
+/**
+ * Sets MTU of an interface.
+ *
+ * dev Pointer to interface struct.
+ * new_mtu The new MTU to use for this interface.
+ *
+ * returns 0 on success, -EINVAL if MTU is out of valid range.
+ * (valid range is 576 .. 65527). If VM is on the
+ * remote side, maximum MTU is 32760, however this is
+ * not checked here.
+ */
+static int ctcm_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct ctcm_priv *priv;
+ int max_bufsize;
+
+ CTCM_DBF_TEXT(SETUP, CTC_DBF_INFO, __FUNCTION__);
+
+ if (new_mtu < 576 || new_mtu > 65527)
+ return -EINVAL;
+
+ priv = dev->priv;
+ max_bufsize = priv->channel[READ]->max_bufsize;
+
+ if (IS_MPC(priv)) {
+ if (new_mtu > max_bufsize - TH_HEADER_LENGTH)
+ return -EINVAL;
+ dev->hard_header_len = TH_HEADER_LENGTH + PDU_HEADER_LENGTH;
+ } else {
+ if (new_mtu > max_bufsize - LL_HEADER_LENGTH - 2)
+ return -EINVAL;
+ dev->hard_header_len = LL_HEADER_LENGTH + 2;
+ }
+ dev->mtu = new_mtu;
+ return 0;
+}
+
+/**
+ * Returns interface statistics of a device.
+ *
+ * dev Pointer to interface struct.
+ *
+ * returns Pointer to stats struct of this interface.
+ */
+static struct net_device_stats *ctcm_stats(struct net_device *dev)
+{
+ return &((struct ctcm_priv *)dev->priv)->stats;
+}
+
+
+static void ctcm_netdev_unregister(struct net_device *dev)
+{
+ CTCM_DBF_TEXT(SETUP, CTC_DBF_INFO, __FUNCTION__);
+ if (!dev)
+ return;
+ unregister_netdev(dev);
+}
+
+static int ctcm_netdev_register(struct net_device *dev)
+{
+ CTCM_DBF_TEXT(SETUP, CTC_DBF_INFO, __FUNCTION__);
+ return register_netdev(dev);
+}
+
+static void ctcm_free_netdevice(struct net_device *dev)
+{
+ struct ctcm_priv *priv;
+ struct mpc_group *grp;
+
+ CTCM_DBF_TEXT(SETUP, CTC_DBF_INFO, __FUNCTION__);
+
+ if (!dev)
+ return;
+ priv = dev->priv;
+ if (priv) {
+ grp = priv->mpcg;
+ if (grp) {
+ if (grp->fsm)
+ kfree_fsm(grp->fsm);
+ if (grp->xid_skb)
+ dev_kfree_skb(grp->xid_skb);
+ if (grp->rcvd_xid_skb)
+ dev_kfree_skb(grp->rcvd_xid_skb);
+ tasklet_kill(&grp->mpc_tasklet2);
+ kfree(grp);
+ priv->mpcg = NULL;
+ }
+ if (priv->fsm) {
+ kfree_fsm(priv->fsm);
+ priv->fsm = NULL;
+ }
+ kfree(priv->xid);
+ priv->xid = NULL;
+ /*
+ * Note: kfree(priv); is done in "opposite" function of
+ * allocator function probe_device which is remove_device.
+ */
+ }
+#ifdef MODULE
+ free_netdev(dev);
+#endif
+}
+
+struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv);
+
+void static ctcm_dev_setup(struct net_device *dev)
+{
+ dev->open = ctcm_open;
+ dev->stop = ctcm_close;
+ dev->get_stats = ctcm_stats;
+ dev->change_mtu = ctcm_change_mtu;
+ dev->type = ARPHRD_SLIP;
+ dev->tx_queue_len = 100;
+ dev->flags = IFF_POINTOPOINT | IFF_NOARP;
+}
+
+/*
+ * Initialize everything of the net device except the name and the
+ * channel structs.
+ */
+static struct net_device *ctcm_init_netdevice(struct ctcm_priv *priv)
+{
+ struct net_device *dev;
+ struct mpc_group *grp;
+ if (!priv)
+ return NULL;
+
+ if (IS_MPC(priv))
+ dev = alloc_netdev(0, MPC_DEVICE_GENE, ctcm_dev_setup);
+ else
+ dev = alloc_netdev(0, CTC_DEVICE_GENE, ctcm_dev_setup);
+
+ if (!dev) {
+ ctcm_pr_err("%s: Out of memory\n", __FUNCTION__);
+ return NULL;
+ }
+ dev->priv = priv;
+ priv->fsm = init_fsm("ctcmdev", dev_state_names, dev_event_names,
+ CTCM_NR_DEV_STATES, CTCM_NR_DEV_EVENTS,
+ dev_fsm, dev_fsm_len, GFP_KERNEL);
+ if (priv->fsm == NULL) {
+ CTCMY_DBF_DEV(SETUP, dev, "init_fsm error");
+ kfree(dev);
+ return NULL;
+ }
+ fsm_newstate(priv->fsm, DEV_STATE_STOPPED);
+ fsm_settimer(priv->fsm, &priv->restart_timer);
+
+ if (IS_MPC(priv)) {
+ /* MPC Group Initializations */
+ grp = ctcmpc_init_mpc_group(priv);
+ if (grp == NULL) {
+ MPC_DBF_DEV(SETUP, dev, "init_mpc_group error");
+ kfree(dev);
+ return NULL;
+ }
+ tasklet_init(&grp->mpc_tasklet2,
+ mpc_group_ready, (unsigned long)dev);
+ dev->mtu = MPC_BUFSIZE_DEFAULT -
+ TH_HEADER_LENGTH - PDU_HEADER_LENGTH;
+
+ dev->hard_start_xmit = ctcmpc_tx;
+ dev->hard_header_len = TH_HEADER_LENGTH + PDU_HEADER_LENGTH;
+ priv->buffer_size = MPC_BUFSIZE_DEFAULT;
+ } else {
+ dev->mtu = CTCM_BUFSIZE_DEFAULT - LL_HEADER_LENGTH - 2;
+ dev->hard_start_xmit = ctcm_tx;
+ dev->hard_header_len = LL_HEADER_LENGTH + 2;
+ }
+
+ CTCMY_DBF_DEV(SETUP, dev, "finished");
+ return dev;
+}
+
+/**
+ * Main IRQ handler.
+ *
+ * cdev The ccw_device the interrupt is for.
+ * intparm interruption parameter.
+ * irb interruption response block.
+ */
+static void ctcm_irq_handler(struct ccw_device *cdev,
+ unsigned long intparm, struct irb *irb)
+{
+ struct channel *ch;
+ struct net_device *dev;
+ struct ctcm_priv *priv;
+ struct ccwgroup_device *cgdev;
+
+ CTCM_DBF_TEXT(TRACE, CTC_DBF_DEBUG, __FUNCTION__);
+ if (ctcm_check_irb_error(cdev, irb))
+ return;
+
+ cgdev = dev_get_drvdata(&cdev->dev);
+
+ /* Check for unsolicited interrupts. */
+ if (cgdev == NULL) {
+ ctcm_pr_warn("ctcm: Got unsolicited irq: %s c-%02x d-%02x\n",
+ cdev->dev.bus_id, irb->scsw.cstat,
+ irb->scsw.dstat);
+ return;
+ }
+
+ priv = dev_get_drvdata(&cgdev->dev);
+
+ /* Try to extract channel from driver data. */
+ if (priv->channel[READ]->cdev == cdev)
+ ch = priv->channel[READ];
+ else if (priv->channel[WRITE]->cdev == cdev)
+ ch = priv->channel[WRITE];
+ else {
+ ctcm_pr_err("ctcm: Can't determine channel for interrupt, "
+ "device %s\n", cdev->dev.bus_id);
+ return;
+ }
+
+ dev = (struct net_device *)(ch->netdev);
+ if (dev == NULL) {
+ ctcm_pr_crit("ctcm: %s dev=NULL bus_id=%s, ch=0x%p\n",
+ __FUNCTION__, cdev->dev.bus_id, ch);
+ return;
+ }
+
+ if (do_debug)
+ ctcm_pr_debug("%s: interrupt for device: %s "
+ "received c-%02x d-%02x\n",
+ dev->name,
+ ch->id,
+ irb->scsw.cstat,
+ irb->scsw.dstat);
+
+ /* Copy interruption response block. */
+ memcpy(ch->irb, irb, sizeof(struct irb));
+
+ /* Check for good subchannel return code, otherwise error message */
+ if (irb->scsw.cstat) {
+ fsm_event(ch->fsm, CTC_EVENT_SC_UNKNOWN, ch);
+ ctcm_pr_warn("%s: subchannel check for dev: %s - %02x %02x\n",
+ dev->name, ch->id, irb->scsw.cstat,
+ irb->scsw.dstat);
+ return;
+ }
+
+ /* Check the reason-code of a unit check */
+ if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
+ ccw_unit_check(ch, irb->ecw[0]);
+ return;
+ }
+ if (irb->scsw.dstat & DEV_STAT_BUSY) {
+ if (irb->scsw.dstat & DEV_STAT_ATTENTION)
+ fsm_event(ch->fsm, CTC_EVENT_ATTNBUSY, ch);
+ else
+ fsm_event(ch->fsm, CTC_EVENT_BUSY, ch);
+ return;
+ }
+ if (irb->scsw.dstat & DEV_STAT_ATTENTION) {
+ fsm_event(ch->fsm, CTC_EVENT_ATTN, ch);
+ return;
+ }
+ if ((irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
+ (irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
+ (irb->scsw.stctl ==
+ (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))
+ fsm_event(ch->fsm, CTC_EVENT_FINSTAT, ch);
+ else
+ fsm_event(ch->fsm, CTC_EVENT_IRQ, ch);
+
+}
+
+/**
+ * Add ctcm specific attributes.
+ * Add ctcm private data.
+ *
+ * cgdev pointer to ccwgroup_device just added
+ *
+ * returns 0 on success, !0 on failure.
+ */
+static int ctcm_probe_device(struct ccwgroup_device *cgdev)
+{
+ struct ctcm_priv *priv;
+ int rc;
+
+ CTCM_DBF_TEXT_(SETUP, CTC_DBF_INFO, "%s %p", __FUNCTION__, cgdev);
+
+ if (!get_device(&cgdev->dev))
+ return -ENODEV;
+
+ priv = kzalloc(sizeof(struct ctcm_priv), GFP_KERNEL);
+ if (!priv) {
+ ctcm_pr_err("%s: Out of memory\n", __FUNCTION__);
+ put_device(&cgdev->dev);
+ return -ENOMEM;
+ }
+
+ rc = ctcm_add_files(&cgdev->dev);
+ if (rc) {
+ kfree(priv);
+ put_device(&cgdev->dev);
+ return rc;
+ }
+ priv->buffer_size = CTCM_BUFSIZE_DEFAULT;
+ cgdev->cdev[0]->handler = ctcm_irq_handler;
+ cgdev->cdev[1]->handler = ctcm_irq_handler;
+ dev_set_drvdata(&cgdev->dev, priv);
+
+ return 0;
+}
+
+/**
+ * Add a new channel to the list of channels.
+ * Keeps the channel list sorted.
+ *
+ * cdev The ccw_device to be added.
+ * type The type class of the new channel.
+ * priv Points to the private data of the ccwgroup_device.
+ *
+ * returns 0 on success, !0 on error.
+ */
+static int add_channel(struct ccw_device *cdev, enum channel_types type,
+ struct ctcm_priv *priv)
+{
+ struct channel **c = &channels;
+ struct channel *ch;
+ int ccw_num;
+ int rc = 0;
+
+ CTCM_DBF_TEXT(TRACE, 2, __FUNCTION__);
+ ch = kzalloc(sizeof(struct channel), GFP_KERNEL);
+ if (ch == NULL)
+ goto nomem_return;
+
+ ch->protocol = priv->protocol;
+ if (IS_MPC(priv)) {
+ ch->discontact_th = (struct th_header *)
+ kzalloc(TH_HEADER_LENGTH, gfp_type());
+ if (ch->discontact_th == NULL)
+ goto nomem_return;
+
+ ch->discontact_th->th_blk_flag = TH_DISCONTACT;
+ tasklet_init(&ch->ch_disc_tasklet,
+ mpc_action_send_discontact, (unsigned long)ch);
+
+ tasklet_init(&ch->ch_tasklet, ctcmpc_bh, (unsigned long)ch);
+ ch->max_bufsize = (MPC_BUFSIZE_DEFAULT - 35);
+ ccw_num = 17;
+ } else
+ ccw_num = 8;
+
+ ch->ccw = (struct ccw1 *)
+ kzalloc(ccw_num * sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
+ if (ch->ccw == NULL)
+ goto nomem_return;
+
+ ch->cdev = cdev;
+ snprintf(ch->id, CTCM_ID_SIZE, "ch-%s", cdev->dev.bus_id);
+ ch->type = type;
+
+ /**
+ * "static" ccws are used in the following way:
+ *
+ * ccw[0..2] (Channel program for generic I/O):
+ * 0: prepare
+ * 1: read or write (depending on direction) with fixed
+ * buffer (idal allocated once when buffer is allocated)
+ * 2: nop
+ * ccw[3..5] (Channel program for direct write of packets)
+ * 3: prepare
+ * 4: write (idal allocated on every write).
+ * 5: nop
+ * ccw[6..7] (Channel program for initial channel setup):
+ * 6: set extended mode
+ * 7: nop
+ *
+ * ch->ccw[0..5] are initialized in ch_action_start because
+ * the channel's direction is yet unknown here.
+ *
+ * ccws used for xid2 negotiations
+ * ch-ccw[8-14] need to be used for the XID exchange either
+ * X side XID2 Processing
+ * 8: write control
+ * 9: write th
+ * 10: write XID
+ * 11: read th from secondary
+ * 12: read XID from secondary
+ * 13: read 4 byte ID
+ * 14: nop
+ * Y side XID Processing
+ * 8: sense
+ * 9: read th
+ * 10: read XID
+ * 11: write th
+ * 12: write XID
+ * 13: write 4 byte ID
+ * 14: nop
+ *
+ * ccws used for double noop due to VM timing issues
+ * which result in unrecoverable Busy on channel
+ * 15: nop
+ * 16: nop
+ */
+ ch->ccw[6].cmd_code = CCW_CMD_SET_EXTENDED;
+ ch->ccw[6].flags = CCW_FLAG_SLI;
+
+ ch->ccw[7].cmd_code = CCW_CMD_NOOP;
+ ch->ccw[7].flags = CCW_FLAG_SLI;
+
+ if (IS_MPC(priv)) {
+ ch->ccw[15].cmd_code = CCW_CMD_WRITE;
+ ch->ccw[15].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ ch->ccw[15].count = TH_HEADER_LENGTH;
+ ch->ccw[15].cda = virt_to_phys(ch->discontact_th);
+
+ ch->ccw[16].cmd_code = CCW_CMD_NOOP;
+ ch->ccw[16].flags = CCW_FLAG_SLI;
+
+ ch->fsm = init_fsm(ch->id, ctc_ch_state_names,
+ ctc_ch_event_names, CTC_MPC_NR_STATES,
+ CTC_MPC_NR_EVENTS, ctcmpc_ch_fsm,
+ mpc_ch_fsm_len, GFP_KERNEL);
+ } else {
+ ch->fsm = init_fsm(ch->id, ctc_ch_state_names,
+ ctc_ch_event_names, CTC_NR_STATES,
+ CTC_NR_EVENTS, ch_fsm,
+ ch_fsm_len, GFP_KERNEL);
+ }
+ if (ch->fsm == NULL)
+ goto free_return;
+
+ fsm_newstate(ch->fsm, CTC_STATE_IDLE);
+
+ ch->irb = kzalloc(sizeof(struct irb), GFP_KERNEL);
+ if (ch->irb == NULL)
+ goto nomem_return;
+
+ while (*c && ctcm_less_than((*c)->id, ch->id))
+ c = &(*c)->next;
+
+ if (*c && (!strncmp((*c)->id, ch->id, CTCM_ID_SIZE))) {
+ CTCM_DBF_TEXT_(SETUP, CTC_DBF_INFO,
+ "%s (%s) already in list, using old entry",
+ __FUNCTION__, (*c)->id);
+
+ goto free_return;
+ }
+
+ spin_lock_init(&ch->collect_lock);
+
+ fsm_settimer(ch->fsm, &ch->timer);
+ skb_queue_head_init(&ch->io_queue);
+ skb_queue_head_init(&ch->collect_queue);
+
+ if (IS_MPC(priv)) {
+ fsm_settimer(ch->fsm, &ch->sweep_timer);
+ skb_queue_head_init(&ch->sweep_queue);
+ }
+ ch->next = *c;
+ *c = ch;
+ return 0;
+
+nomem_return:
+ ctcm_pr_warn("ctcm: Out of memory in %s\n", __FUNCTION__);
+ rc = -ENOMEM;
+
+free_return: /* note that all channel pointers are 0 or valid */
+ kfree(ch->ccw); /* TODO: check that again */
+ kfree(ch->discontact_th);
+ kfree_fsm(ch->fsm);
+ kfree(ch->irb);
+ kfree(ch);
+ return rc;
+}
+
+/*
+ * Return type of a detected device.
+ */
+static enum channel_types get_channel_type(struct ccw_device_id *id)
+{
+ enum channel_types type;
+ type = (enum channel_types)id->driver_info;
+
+ if (type == channel_type_ficon)
+ type = channel_type_escon;
+
+ return type;
+}
+
+/**
+ *
+ * Setup an interface.
+ *
+ * cgdev Device to be setup.
+ *
+ * returns 0 on success, !0 on failure.
+ */
+static int ctcm_new_device(struct ccwgroup_device *cgdev)
+{
+ char read_id[CTCM_ID_SIZE];
+ char write_id[CTCM_ID_SIZE];
+ int direction;
+ enum channel_types type;
+ struct ctcm_priv *priv;
+ struct net_device *dev;
+ int ret;
+
+ CTCM_DBF_TEXT(SETUP, CTC_DBF_INFO, __FUNCTION__);
+
+ priv = dev_get_drvdata(&cgdev->dev);
+ if (!priv)
+ return -ENODEV;
+
+ type = get_channel_type(&cgdev->cdev[0]->id);
+
+ snprintf(read_id, CTCM_ID_SIZE, "ch-%s", cgdev->cdev[0]->dev.bus_id);
+ snprintf(write_id, CTCM_ID_SIZE, "ch-%s", cgdev->cdev[1]->dev.bus_id);
+
+ ret = add_channel(cgdev->cdev[0], type, priv);
+ if (ret)
+ return ret;
+ ret = add_channel(cgdev->cdev[1], type, priv);
+ if (ret)
+ return ret;
+
+ ret = ccw_device_set_online(cgdev->cdev[0]);
+ if (ret != 0) {
+ CTCM_DBF_TEXT(SETUP, CTC_DBF_WARN,
+ "ccw_device_set_online (cdev[0]) failed ");
+ ctcm_pr_warn("ccw_device_set_online (cdev[0]) failed "
+ "with ret = %d\n", ret);
+ }
+
+ ret = ccw_device_set_online(cgdev->cdev[1]);
+ if (ret != 0) {
+ CTCM_DBF_TEXT(SETUP, CTC_DBF_WARN,
+ "ccw_device_set_online (cdev[1]) failed ");
+ ctcm_pr_warn("ccw_device_set_online (cdev[1]) failed "
+ "with ret = %d\n", ret);
+ }
+
+ dev = ctcm_init_netdevice(priv);
+
+ if (dev == NULL) {
+ ctcm_pr_warn("ctcm_init_netdevice failed\n");
+ goto out;
+ }
+
+ for (direction = READ; direction <= WRITE; direction++) {
+ priv->channel[direction] =
+ channel_get(type, direction == READ ? read_id : write_id,
+ direction);
+ if (priv->channel[direction] == NULL) {
+ if (direction == WRITE)
+ channel_free(priv->channel[READ]);
+ ctcm_free_netdevice(dev);
+ goto out;
+ }
+ priv->channel[direction]->netdev = dev;
+ priv->channel[direction]->protocol = priv->protocol;
+ priv->channel[direction]->max_bufsize = priv->buffer_size;
+ }
+ /* sysfs magic */
+ SET_NETDEV_DEV(dev, &cgdev->dev);
+
+ if (ctcm_netdev_register(dev) != 0) {
+ ctcm_free_netdevice(dev);
+ goto out;
+ }
+
+ if (ctcm_add_attributes(&cgdev->dev)) {
+ ctcm_netdev_unregister(dev);
+/* dev->priv = NULL; why that ???? */
+ ctcm_free_netdevice(dev);
+ goto out;
+ }
+
+ strlcpy(priv->fsm->name, dev->name, sizeof(priv->fsm->name));
+
+ CTCM_DBF_TEXT_(SETUP, CTC_DBF_INFO,
+ "setup(%s) ok : r/w = %s / %s, proto : %d",
+ dev->name, priv->channel[READ]->id,
+ priv->channel[WRITE]->id, priv->protocol);
+
+ return 0;
+out:
+ ccw_device_set_offline(cgdev->cdev[1]);
+ ccw_device_set_offline(cgdev->cdev[0]);
+
+ return -ENODEV;
+}
+
+/**
+ * Shutdown an interface.
+ *
+ * cgdev Device to be shut down.
+ *
+ * returns 0 on success, !0 on failure.
+ */
+static int ctcm_shutdown_device(struct ccwgroup_device *cgdev)
+{
+ struct ctcm_priv *priv;
+ struct net_device *dev;
+
+ priv = dev_get_drvdata(&cgdev->dev);
+ if (!priv)
+ return -ENODEV;
+
+ if (priv->channel[READ]) {
+ dev = priv->channel[READ]->netdev;
+ CTCM_DBF_DEV(SETUP, dev, "");
+ /* Close the device */
+ ctcm_close(dev);
+ dev->flags &= ~IFF_RUNNING;
+ ctcm_remove_attributes(&cgdev->dev);
+ channel_free(priv->channel[READ]);
+ } else
+ dev = NULL;
+
+ if (priv->channel[WRITE])
+ channel_free(priv->channel[WRITE]);
+
+ if (dev) {
+ ctcm_netdev_unregister(dev);
+/* dev->priv = NULL; why that ??? */
+ ctcm_free_netdevice(dev);
+ }
+
+ if (priv->fsm)
+ kfree_fsm(priv->fsm);
+
+ ccw_device_set_offline(cgdev->cdev[1]);
+ ccw_device_set_offline(cgdev->cdev[0]);
+
+ if (priv->channel[READ])
+ channel_remove(priv->channel[READ]);
+ if (priv->channel[WRITE])
+ channel_remove(priv->channel[WRITE]);
+ priv->channel[READ] = priv->channel[WRITE] = NULL;
+
+ return 0;
+
+}
+
+
+static void ctcm_remove_device(struct ccwgroup_device *cgdev)
+{
+ struct ctcm_priv *priv;
+
+ CTCM_DBF_TEXT(SETUP, CTC_DBF_ERROR, __FUNCTION__);
+
+ priv = dev_get_drvdata(&cgdev->dev);
+ if (!priv)
+ return;
+ if (cgdev->state == CCWGROUP_ONLINE)
+ ctcm_shutdown_device(cgdev);
+ ctcm_remove_files(&cgdev->dev);
+ dev_set_drvdata(&cgdev->dev, NULL);
+ kfree(priv);
+ put_device(&cgdev->dev);
+}
+
+static struct ccwgroup_driver ctcm_group_driver = {
+ .owner = THIS_MODULE,
+ .name = CTC_DRIVER_NAME,
+ .max_slaves = 2,
+ .driver_id = 0xC3E3C3D4, /* CTCM */
+ .probe = ctcm_probe_device,
+ .remove = ctcm_remove_device,
+ .set_online = ctcm_new_device,
+ .set_offline = ctcm_shutdown_device,
+};
+
+
+/*
+ * Module related routines
+ */
+
+/*
+ * Prepare to be unloaded. Free IRQ's and release all resources.
+ * This is called just before this module is unloaded. It is
+ * not called, if the usage count is !0, so we don't need to check
+ * for that.
+ */
+static void __exit ctcm_exit(void)
+{
+ unregister_cu3088_discipline(&ctcm_group_driver);
+ ctcm_unregister_dbf_views();
+ ctcm_pr_info("CTCM driver unloaded\n");
+}
+
+/*
+ * Print Banner.
+ */
+static void print_banner(void)
+{
+ printk(KERN_INFO "CTCM driver initialized\n");
+}
+
+/**
+ * Initialize module.
+ * This is called just after the module is loaded.
+ *
+ * returns 0 on success, !0 on error.
+ */
+static int __init ctcm_init(void)
+{
+ int ret;
+
+ channels = NULL;
+
+ ret = ctcm_register_dbf_views();
+ if (ret) {
+ ctcm_pr_crit("ctcm_init failed with ctcm_register_dbf_views "
+ "rc = %d\n", ret);
+ return ret;
+ }
+ ret = register_cu3088_discipline(&ctcm_group_driver);
+ if (ret) {
+ ctcm_unregister_dbf_views();
+ ctcm_pr_crit("ctcm_init failed with register_cu3088_discipline "
+ "(rc = %d)\n", ret);
+ return ret;
+ }
+ print_banner();
+ return ret;
+}
+
+module_init(ctcm_init);
+module_exit(ctcm_exit);
+
+MODULE_AUTHOR("Peter Tiedemann <ptiedem@de.ibm.com>");
+MODULE_DESCRIPTION("Network driver for S/390 CTC + CTCMPC (SNA)");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/s390/net/ctcm_main.h b/drivers/s390/net/ctcm_main.h
new file mode 100644
index 0000000..95b0c0b
--- /dev/null
+++ b/drivers/s390/net/ctcm_main.h
@@ -0,0 +1,287 @@
+/*
+ * drivers/s390/net/ctcm_main.h
+ *
+ * Copyright IBM Corp. 2001, 2007
+ * Authors: Fritz Elfert (felfert@millenux.com)
+ * Peter Tiedemann (ptiedem@de.ibm.com)
+ */
+
+#ifndef _CTCM_MAIN_H_
+#define _CTCM_MAIN_H_
+
+#include <asm/ccwdev.h>
+#include <asm/ccwgroup.h>
+
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+
+#include "fsm.h"
+#include "cu3088.h"
+#include "ctcm_dbug.h"
+#include "ctcm_mpc.h"
+
+#define CTC_DRIVER_NAME "ctcm"
+#define CTC_DEVICE_NAME "ctc"
+#define CTC_DEVICE_GENE "ctc%d"
+#define MPC_DEVICE_NAME "mpc"
+#define MPC_DEVICE_GENE "mpc%d"
+
+#define CHANNEL_FLAGS_READ 0
+#define CHANNEL_FLAGS_WRITE 1
+#define CHANNEL_FLAGS_INUSE 2
+#define CHANNEL_FLAGS_BUFSIZE_CHANGED 4
+#define CHANNEL_FLAGS_FAILED 8
+#define CHANNEL_FLAGS_WAITIRQ 16
+#define CHANNEL_FLAGS_RWMASK 1
+#define CHANNEL_DIRECTION(f) (f & CHANNEL_FLAGS_RWMASK)
+
+#define LOG_FLAG_ILLEGALPKT 1
+#define LOG_FLAG_ILLEGALSIZE 2
+#define LOG_FLAG_OVERRUN 4
+#define LOG_FLAG_NOMEM 8
+
+#define ctcm_pr_debug(fmt, arg...) printk(KERN_DEBUG fmt, ##arg)
+#define ctcm_pr_info(fmt, arg...) printk(KERN_INFO fmt, ##arg)
+#define ctcm_pr_notice(fmt, arg...) printk(KERN_NOTICE fmt, ##arg)
+#define ctcm_pr_warn(fmt, arg...) printk(KERN_WARNING fmt, ##arg)
+#define ctcm_pr_emerg(fmt, arg...) printk(KERN_EMERG fmt, ##arg)
+#define ctcm_pr_err(fmt, arg...) printk(KERN_ERR fmt, ##arg)
+#define ctcm_pr_crit(fmt, arg...) printk(KERN_CRIT fmt, ##arg)
+
+/*
+ * CCW commands, used in this driver.
+ */
+#define CCW_CMD_WRITE 0x01
+#define CCW_CMD_READ 0x02
+#define CCW_CMD_NOOP 0x03
+#define CCW_CMD_TIC 0x08
+#define CCW_CMD_SENSE_CMD 0x14
+#define CCW_CMD_WRITE_CTL 0x17
+#define CCW_CMD_SET_EXTENDED 0xc3
+#define CCW_CMD_PREPARE 0xe3
+
+#define CTCM_PROTO_S390 0
+#define CTCM_PROTO_LINUX 1
+#define CTCM_PROTO_LINUX_TTY 2
+#define CTCM_PROTO_OS390 3
+#define CTCM_PROTO_MPC 4
+#define CTCM_PROTO_MAX 4
+
+#define CTCM_BUFSIZE_LIMIT 65535
+#define CTCM_BUFSIZE_DEFAULT 32768
+#define MPC_BUFSIZE_DEFAULT CTCM_BUFSIZE_LIMIT
+
+#define CTCM_TIME_1_SEC 1000
+#define CTCM_TIME_5_SEC 5000
+#define CTCM_TIME_10_SEC 10000
+
+#define CTCM_INITIAL_BLOCKLEN 2
+
+#define READ 0
+#define WRITE 1
+
+#define CTCM_ID_SIZE BUS_ID_SIZE+3
+
+struct ctcm_profile {
+ unsigned long maxmulti;
+ unsigned long maxcqueue;
+ unsigned long doios_single;
+ unsigned long doios_multi;
+ unsigned long txlen;
+ unsigned long tx_time;
+ struct timespec send_stamp;
+};
+
+/*
+ * Definition of one channel
+ */
+struct channel {
+ struct channel *next;
+ char id[CTCM_ID_SIZE];
+ struct ccw_device *cdev;
+ /*
+ * Type of this channel.
+ * CTC/A or Escon for valid channels.
+ */
+ enum channel_types type;
+ /*
+ * Misc. flags. See CHANNEL_FLAGS_... below
+ */
+ __u32 flags;
+ __u16 protocol; /* protocol of this channel (4 = MPC) */
+ /*
+ * I/O and irq related stuff
+ */
+ struct ccw1 *ccw;
+ struct irb *irb;
+ /*
+ * RX/TX buffer size
+ */
+ int max_bufsize;
+ struct sk_buff *trans_skb; /* transmit/receive buffer */
+ struct sk_buff_head io_queue; /* universal I/O queue */
+ struct tasklet_struct ch_tasklet; /* MPC ONLY */
+ /*
+ * TX queue for collecting skb's during busy.
+ */
+ struct sk_buff_head collect_queue;
+ /*
+ * Amount of data in collect_queue.
+ */
+ int collect_len;
+ /*
+ * spinlock for collect_queue and collect_len
+ */
+ spinlock_t collect_lock;
+ /*
+ * Timer for detecting unresposive
+ * I/O operations.
+ */
+ fsm_timer timer;
+ /* MPC ONLY section begin */
+ __u32 th_seq_num; /* SNA TH seq number */
+ __u8 th_seg;
+ __u32 pdu_seq;
+ struct sk_buff *xid_skb;
+ char *xid_skb_data;
+ struct th_header *xid_th;
+ struct xid2 *xid;
+ char *xid_id;
+ struct th_header *rcvd_xid_th;
+ struct xid2 *rcvd_xid;
+ char *rcvd_xid_id;
+ __u8 in_mpcgroup;
+ fsm_timer sweep_timer;
+ struct sk_buff_head sweep_queue;
+ struct th_header *discontact_th;
+ struct tasklet_struct ch_disc_tasklet;
+ /* MPC ONLY section end */
+
+ int retry; /* retry counter for misc. operations */
+ fsm_instance *fsm; /* finite state machine of this channel */
+ struct net_device *netdev; /* corresponding net_device */
+ struct ctcm_profile prof;
+ unsigned char *trans_skb_data;
+ __u16 logflags;
+};
+
+struct ctcm_priv {
+ struct net_device_stats stats;
+ unsigned long tbusy;
+
+ /* The MPC group struct of this interface */
+ struct mpc_group *mpcg; /* MPC only */
+ struct xid2 *xid; /* MPC only */
+
+ /* The finite state machine of this interface */
+ fsm_instance *fsm;
+
+ /* The protocol of this device */
+ __u16 protocol;
+
+ /* Timer for restarting after I/O Errors */
+ fsm_timer restart_timer;
+
+ int buffer_size; /* ctc only */
+
+ struct channel *channel[2];
+};
+
+int ctcm_open(struct net_device *dev);
+int ctcm_close(struct net_device *dev);
+
+/*
+ * prototypes for non-static sysfs functions
+ */
+int ctcm_add_attributes(struct device *dev);
+void ctcm_remove_attributes(struct device *dev);
+int ctcm_add_files(struct device *dev);
+void ctcm_remove_files(struct device *dev);
+
+/*
+ * Compatibility macros for busy handling
+ * of network devices.
+ */
+static inline void ctcm_clear_busy_do(struct net_device *dev)
+{
+ clear_bit(0, &(((struct ctcm_priv *)dev->priv)->tbusy));
+ netif_wake_queue(dev);
+}
+
+static inline void ctcm_clear_busy(struct net_device *dev)
+{
+ struct mpc_group *grp;
+ grp = ((struct ctcm_priv *)dev->priv)->mpcg;
+
+ if (!(grp && grp->in_sweep))
+ ctcm_clear_busy_do(dev);
+}
+
+
+static inline int ctcm_test_and_set_busy(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ return test_and_set_bit(0, &(((struct ctcm_priv *)dev->priv)->tbusy));
+}
+
+extern int loglevel;
+extern struct channel *channels;
+
+void ctcm_unpack_skb(struct channel *ch, struct sk_buff *pskb);
+
+/*
+ * Functions related to setup and device detection.
+ */
+
+static inline int ctcm_less_than(char *id1, char *id2)
+{
+ unsigned long dev1, dev2;
+
+ id1 = id1 + 5;
+ id2 = id2 + 5;
+
+ dev1 = simple_strtoul(id1, &id1, 16);
+ dev2 = simple_strtoul(id2, &id2, 16);
+
+ return (dev1 < dev2);
+}
+
+int ctcm_ch_alloc_buffer(struct channel *ch);
+
+static inline int ctcm_checkalloc_buffer(struct channel *ch)
+{
+ if (ch->trans_skb == NULL)
+ return ctcm_ch_alloc_buffer(ch);
+ if (ch->flags & CHANNEL_FLAGS_BUFSIZE_CHANGED) {
+ dev_kfree_skb(ch->trans_skb);
+ return ctcm_ch_alloc_buffer(ch);
+ }
+ return 0;
+}
+
+struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv);
+
+/* test if protocol attribute (of struct ctcm_priv or struct channel)
+ * has MPC protocol setting. Type is not checked
+ */
+#define IS_MPC(p) ((p)->protocol == CTCM_PROTO_MPC)
+
+/* test if struct ctcm_priv of struct net_device has MPC protocol setting */
+#define IS_MPCDEV(d) IS_MPC((struct ctcm_priv *)d->priv)
+
+static inline gfp_t gfp_type(void)
+{
+ return in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;
+}
+
+/*
+ * Definition of our link level header.
+ */
+struct ll_header {
+ __u16 length;
+ __u16 type;
+ __u16 unused;
+};
+#define LL_HEADER_LENGTH (sizeof(struct ll_header))
+
+#endif
diff --git a/drivers/s390/net/ctcm_mpc.c b/drivers/s390/net/ctcm_mpc.c
new file mode 100644
index 0000000..044adde
--- /dev/null
+++ b/drivers/s390/net/ctcm_mpc.c
@@ -0,0 +1,2472 @@
+/*
+ * drivers/s390/net/ctcm_mpc.c
+ *
+ * Copyright IBM Corp. 2004, 2007
+ * Authors: Belinda Thompson (belindat@us.ibm.com)
+ * Andy Richter (richtera@us.ibm.com)
+ * Peter Tiedemann (ptiedem@de.ibm.com)
+ */
+
+/*
+ This module exports functions to be used by CCS:
+ EXPORT_SYMBOL(ctc_mpc_alloc_channel);
+ EXPORT_SYMBOL(ctc_mpc_establish_connectivity);
+ EXPORT_SYMBOL(ctc_mpc_dealloc_ch);
+ EXPORT_SYMBOL(ctc_mpc_flow_control);
+*/
+
+#undef DEBUG
+#undef DEBUGDATA
+#undef DEBUGCCW
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/sched.h>
+
+#include <linux/signal.h>
+#include <linux/string.h>
+#include <linux/proc_fs.h>
+
+#include <linux/ip.h>
+#include <linux/if_arp.h>
+#include <linux/tcp.h>
+#include <linux/skbuff.h>
+#include <linux/ctype.h>
+#include <linux/netdevice.h>
+#include <net/dst.h>
+
+#include <linux/io.h> /* instead of <asm/io.h> ok ? */
+#include <asm/ccwdev.h>
+#include <asm/ccwgroup.h>
+#include <linux/bitops.h> /* instead of <asm/bitops.h> ok ? */
+#include <linux/uaccess.h> /* instead of <asm/uaccess.h> ok ? */
+#include <linux/wait.h>
+#include <linux/moduleparam.h>
+#include <asm/idals.h>
+
+#include "cu3088.h"
+#include "ctcm_mpc.h"
+#include "ctcm_main.h"
+#include "ctcm_fsms.h"
+
+static const struct xid2 init_xid = {
+ .xid2_type_id = XID_FM2,
+ .xid2_len = 0x45,
+ .xid2_adj_id = 0,
+ .xid2_rlen = 0x31,
+ .xid2_resv1 = 0,
+ .xid2_flag1 = 0,
+ .xid2_fmtt = 0,
+ .xid2_flag4 = 0x80,
+ .xid2_resv2 = 0,
+ .xid2_tgnum = 0,
+ .xid2_sender_id = 0,
+ .xid2_flag2 = 0,
+ .xid2_option = XID2_0,
+ .xid2_resv3 = "\x00",
+ .xid2_resv4 = 0,
+ .xid2_dlc_type = XID2_READ_SIDE,
+ .xid2_resv5 = 0,
+ .xid2_mpc_flag = 0,
+ .xid2_resv6 = 0,
+ .xid2_buf_len = (MPC_BUFSIZE_DEFAULT - 35),
+};
+
+static const struct th_header thnorm = {
+ .th_seg = 0x00,
+ .th_ch_flag = TH_IS_XID,
+ .th_blk_flag = TH_DATA_IS_XID,
+ .th_is_xid = 0x01,
+ .th_seq_num = 0x00000000,
+};
+
+static const struct th_header thdummy = {
+ .th_seg = 0x00,
+ .th_ch_flag = 0x00,
+ .th_blk_flag = TH_DATA_IS_XID,
+ .th_is_xid = 0x01,
+ .th_seq_num = 0x00000000,
+};
+
+/*
+ * Definition of one MPC group
+ */
+
+/*
+ * Compatibility macros for busy handling
+ * of network devices.
+ */
+
+static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb);
+
+/*
+ * MPC Group state machine actions (static prototypes)
+ */
+static void mpc_action_nop(fsm_instance *fsm, int event, void *arg);
+static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg);
+static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg);
+static void mpc_action_timeout(fsm_instance *fi, int event, void *arg);
+static int mpc_validate_xid(struct mpcg_info *mpcginfo);
+static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg);
+static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg);
+static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg);
+static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg);
+static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg);
+static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg);
+
+#ifdef DEBUGDATA
+/*-------------------------------------------------------------------*
+* Dump buffer format *
+* *
+*--------------------------------------------------------------------*/
+void ctcmpc_dumpit(char *buf, int len)
+{
+ __u32 ct, sw, rm, dup;
+ char *ptr, *rptr;
+ char tbuf[82], tdup[82];
+ #if (UTS_MACHINE == s390x)
+ char addr[22];
+ #else
+ char addr[12];
+ #endif
+ char boff[12];
+ char bhex[82], duphex[82];
+ char basc[40];
+
+ sw = 0;
+ rptr = ptr = buf;
+ rm = 16;
+ duphex[0] = 0x00;
+ dup = 0;
+
+ for (ct = 0; ct < len; ct++, ptr++, rptr++) {
+ if (sw == 0) {
+ #if (UTS_MACHINE == s390x)
+ sprintf(addr, "%16.16lx", (unsigned long)rptr);
+ #else
+ sprintf(addr, "%8.8X", (__u32)rptr);
+ #endif
+
+ sprintf(boff, "%4.4X", (__u32)ct);
+ bhex[0] = '\0';
+ basc[0] = '\0';
+ }
+ if ((sw == 4) || (sw == 12))
+ strcat(bhex, " ");
+ if (sw == 8)
+ strcat(bhex, " ");
+
+ #if (UTS_MACHINE == s390x)
+ sprintf(tbuf, "%2.2lX", (unsigned long)*ptr);
+ #else
+ sprintf(tbuf, "%2.2X", (__u32)*ptr);
+ #endif
+
+ tbuf[2] = '\0';
+ strcat(bhex, tbuf);
+ if ((0 != isprint(*ptr)) && (*ptr >= 0x20))
+ basc[sw] = *ptr;
+ else
+ basc[sw] = '.';
+
+ basc[sw+1] = '\0';
+ sw++;
+ rm--;
+ if (sw == 16) {
+ if ((strcmp(duphex, bhex)) != 0) {
+ if (dup != 0) {
+ sprintf(tdup, "Duplicate as above "
+ "to %s", addr);
+ printk(KERN_INFO " "
+ " --- %s ---\n", tdup);
+ }
+ printk(KERN_INFO " %s (+%s) : %s [%s]\n",
+ addr, boff, bhex, basc);
+ dup = 0;
+ strcpy(duphex, bhex);
+ } else
+ dup++;
+
+ sw = 0;
+ rm = 16;
+ }
+ } /* endfor */
+
+ if (sw != 0) {
+ for ( ; rm > 0; rm--, sw++) {
+ if ((sw == 4) || (sw == 12))
+ strcat(bhex, " ");
+ if (sw == 8)
+ strcat(bhex, " ");
+ strcat(bhex, " ");
+ strcat(basc, " ");
+ }
+ if (dup != 0) {
+ sprintf(tdup, "Duplicate as above to %s", addr);
+ printk(KERN_INFO " "
+ " --- %s ---\n", tdup);
+ }
+ printk(KERN_INFO " %s (+%s) : %s [%s]\n",
+ addr, boff, bhex, basc);
+ } else {
+ if (dup >= 1) {
+ sprintf(tdup, "Duplicate as above to %s", addr);
+ printk(KERN_INFO " "
+ " --- %s ---\n", tdup);
+ }
+ if (dup != 0) {
+ printk(KERN_INFO " %s (+%s) : %s [%s]\n",
+ addr, boff, bhex, basc);
+ }
+ }
+
+ return;
+
+} /* end of ctcmpc_dumpit */
+#endif
+
+#ifdef DEBUGDATA
+/*
+ * Dump header and first 16 bytes of an sk_buff for debugging purposes.
+ *
+ * skb The sk_buff to dump.
+ * offset Offset relative to skb-data, where to start the dump.
+ */
+void ctcmpc_dump_skb(struct sk_buff *skb, int offset)
+{
+ unsigned char *p = skb->data;
+ struct th_header *header;
+ struct pdu *pheader;
+ int bl = skb->len;
+ int i;
+
+ if (p == NULL)
+ return;
+
+ p += offset;
+ header = (struct th_header *)p;
+
+ printk(KERN_INFO "dump:\n");
+ printk(KERN_INFO "skb len=%d \n", skb->len);
+ if (skb->len > 2) {
+ switch (header->th_ch_flag) {
+ case TH_HAS_PDU:
+ break;
+ case 0x00:
+ case TH_IS_XID:
+ if ((header->th_blk_flag == TH_DATA_IS_XID) &&
+ (header->th_is_xid == 0x01))
+ goto dumpth;
+ case TH_SWEEP_REQ:
+ goto dumpth;
+ case TH_SWEEP_RESP:
+ goto dumpth;
+ default:
+ break;
+ }
+
+ pheader = (struct pdu *)p;
+ printk(KERN_INFO "pdu->offset: %d hex: %04x\n",
+ pheader->pdu_offset, pheader->pdu_offset);
+ printk(KERN_INFO "pdu->flag : %02x\n", pheader->pdu_flag);
+ printk(KERN_INFO "pdu->proto : %02x\n", pheader->pdu_proto);
+ printk(KERN_INFO "pdu->seq : %02x\n", pheader->pdu_seq);
+ goto dumpdata;
+
+dumpth:
+ printk(KERN_INFO "th->seg : %02x\n", header->th_seg);
+ printk(KERN_INFO "th->ch : %02x\n", header->th_ch_flag);
+ printk(KERN_INFO "th->blk_flag: %02x\n", header->th_blk_flag);
+ printk(KERN_INFO "th->type : %s\n",
+ (header->th_is_xid) ? "DATA" : "XID");
+ printk(KERN_INFO "th->seqnum : %04x\n", header->th_seq_num);
+
+ }
+dumpdata:
+ if (bl > 32)
+ bl = 32;
+ printk(KERN_INFO "data: ");
+ for (i = 0; i < bl; i++)
+ printk(KERN_INFO "%02x%s", *p++, (i % 16) ? " " : "\n<7>");
+ printk(KERN_INFO "\n");
+}
+#endif
+
+/*
+ * ctc_mpc_alloc_channel
+ * (exported interface)
+ *
+ * Device Initialization :
+ * ACTPATH driven IO operations
+ */
+int ctc_mpc_alloc_channel(int port_num, void (*callback)(int, int))
+{
+ char device[20];
+ struct net_device *dev;
+ struct mpc_group *grp;
+ struct ctcm_priv *priv;
+
+ ctcm_pr_debug("ctcmpc enter: %s()\n", __FUNCTION__);
+
+ sprintf(device, "%s%i", MPC_DEVICE_NAME, port_num);
+ dev = __dev_get_by_name(&init_net, device);
+
+ if (dev == NULL) {
+ printk(KERN_INFO "ctc_mpc_alloc_channel %s dev=NULL\n", device);
+ return 1;
+ }
+
+ priv = dev->priv;
+ grp = priv->mpcg;
+ if (!grp)
+ return 1;
+
+ grp->allochanfunc = callback;
+ grp->port_num = port_num;
+ grp->port_persist = 1;
+
+ ctcm_pr_debug("ctcmpc: %s called for device %s state=%s\n",
+ __FUNCTION__,
+ dev->name,
+ fsm_getstate_str(grp->fsm));
+
+ switch (fsm_getstate(grp->fsm)) {
+ case MPCG_STATE_INOP:
+ /* Group is in the process of terminating */
+ grp->alloc_called = 1;
+ break;
+ case MPCG_STATE_RESET:
+ /* MPC Group will transition to state */
+ /* MPCG_STATE_XID2INITW iff the minimum number */
+ /* of 1 read and 1 write channel have successfully*/
+ /* activated */
+ /*fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);*/
+ if (callback)
+ grp->send_qllc_disc = 1;
+ case MPCG_STATE_XID0IOWAIT:
+ fsm_deltimer(&grp->timer);
+ grp->outstanding_xid2 = 0;
+ grp->outstanding_xid7 = 0;
+ grp->outstanding_xid7_p2 = 0;
+ grp->saved_xid2 = NULL;
+ if (callback)
+ ctcm_open(dev);
+ fsm_event(priv->fsm, DEV_EVENT_START, dev);
+ break;
+ case MPCG_STATE_READY:
+ /* XID exchanges completed after PORT was activated */
+ /* Link station already active */
+ /* Maybe timing issue...retry callback */
+ grp->allocchan_callback_retries++;
+ if (grp->allocchan_callback_retries < 4) {
+ if (grp->allochanfunc)
+ grp->allochanfunc(grp->port_num,
+ grp->group_max_buflen);
+ } else {
+ /* there are problems...bail out */
+ /* there may be a state mismatch so restart */
+ grp->port_persist = 1;
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ grp->allocchan_callback_retries = 0;
+ }
+ break;
+ default:
+ return 0;
+
+ }
+
+ ctcm_pr_debug("ctcmpc exit: %s()\n", __FUNCTION__);
+ return 0;
+}
+EXPORT_SYMBOL(ctc_mpc_alloc_channel);
+
+/*
+ * ctc_mpc_establish_connectivity
+ * (exported interface)
+ */
+void ctc_mpc_establish_connectivity(int port_num,
+ void (*callback)(int, int, int))
+{
+ char device[20];
+ struct net_device *dev;
+ struct mpc_group *grp;
+ struct ctcm_priv *priv;
+ struct channel *rch, *wch;
+
+ ctcm_pr_debug("ctcmpc enter: %s()\n", __FUNCTION__);
+
+ sprintf(device, "%s%i", MPC_DEVICE_NAME, port_num);
+ dev = __dev_get_by_name(&init_net, device);
+
+ if (dev == NULL) {
+ printk(KERN_INFO "ctc_mpc_establish_connectivity "
+ "%s dev=NULL\n", device);
+ return;
+ }
+ priv = dev->priv;
+ rch = priv->channel[READ];
+ wch = priv->channel[WRITE];
+
+ grp = priv->mpcg;
+
+ ctcm_pr_debug("ctcmpc: %s() called for device %s state=%s\n",
+ __FUNCTION__, dev->name,
+ fsm_getstate_str(grp->fsm));
+
+ grp->estconnfunc = callback;
+ grp->port_num = port_num;
+
+ switch (fsm_getstate(grp->fsm)) {
+ case MPCG_STATE_READY:
+ /* XID exchanges completed after PORT was activated */
+ /* Link station already active */
+ /* Maybe timing issue...retry callback */
+ fsm_deltimer(&grp->timer);
+ grp->estconn_callback_retries++;
+ if (grp->estconn_callback_retries < 4) {
+ if (grp->estconnfunc) {
+ grp->estconnfunc(grp->port_num, 0,
+ grp->group_max_buflen);
+ grp->estconnfunc = NULL;
+ }
+ } else {
+ /* there are problems...bail out */
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ grp->estconn_callback_retries = 0;
+ }
+ break;
+ case MPCG_STATE_INOP:
+ case MPCG_STATE_RESET:
+ /* MPC Group is not ready to start XID - min num of */
+ /* 1 read and 1 write channel have not been acquired*/
+ printk(KERN_WARNING "ctcmpc: %s() REJECTED ACTIVE XID Req"
+ "uest - Channel Pair is not Active\n", __FUNCTION__);
+ if (grp->estconnfunc) {
+ grp->estconnfunc(grp->port_num, -1, 0);
+ grp->estconnfunc = NULL;
+ }
+ break;
+ case MPCG_STATE_XID2INITW:
+ /* alloc channel was called but no XID exchange */
+ /* has occurred. initiate xside XID exchange */
+ /* make sure yside XID0 processing has not started */
+ if ((fsm_getstate(rch->fsm) > CH_XID0_PENDING) ||
+ (fsm_getstate(wch->fsm) > CH_XID0_PENDING)) {
+ printk(KERN_WARNING "mpc: %s() ABORT ACTIVE XID"
+ " Request- PASSIVE XID in process\n"
+ , __FUNCTION__);
+ break;
+ }
+ grp->send_qllc_disc = 1;
+ fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIT);
+ fsm_deltimer(&grp->timer);
+ fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE,
+ MPCG_EVENT_TIMER, dev);
+ grp->outstanding_xid7 = 0;
+ grp->outstanding_xid7_p2 = 0;
+ grp->saved_xid2 = NULL;
+ if ((rch->in_mpcgroup) &&
+ (fsm_getstate(rch->fsm) == CH_XID0_PENDING))
+ fsm_event(grp->fsm, MPCG_EVENT_XID0DO, rch);
+ else {
+ printk(KERN_WARNING "mpc: %s() Unable to start"
+ " ACTIVE XID0 on read channel\n",
+ __FUNCTION__);
+ if (grp->estconnfunc) {
+ grp->estconnfunc(grp->port_num, -1, 0);
+ grp->estconnfunc = NULL;
+ }
+ fsm_deltimer(&grp->timer);
+ goto done;
+ }
+ if ((wch->in_mpcgroup) &&
+ (fsm_getstate(wch->fsm) == CH_XID0_PENDING))
+ fsm_event(grp->fsm, MPCG_EVENT_XID0DO, wch);
+ else {
+ printk(KERN_WARNING "mpc: %s() Unable to start"
+ " ACTIVE XID0 on write channel\n",
+ __FUNCTION__);
+ if (grp->estconnfunc) {
+ grp->estconnfunc(grp->port_num, -1, 0);
+ grp->estconnfunc = NULL;
+ }
+ fsm_deltimer(&grp->timer);
+ goto done;
+ }
+ break;
+ case MPCG_STATE_XID0IOWAIT:
+ /* already in active XID negotiations */
+ default:
+ break;
+ }
+
+done:
+ ctcm_pr_debug("ctcmpc exit: %s()\n", __FUNCTION__);
+ return;
+}
+EXPORT_SYMBOL(ctc_mpc_establish_connectivity);
+
+/*
+ * ctc_mpc_dealloc_ch
+ * (exported interface)
+ */
+void ctc_mpc_dealloc_ch(int port_num)
+{
+ struct net_device *dev;
+ char device[20];
+ struct ctcm_priv *priv;
+ struct mpc_group *grp;
+
+ ctcm_pr_debug("ctcmpc enter: %s()\n", __FUNCTION__);
+ sprintf(device, "%s%i", MPC_DEVICE_NAME, port_num);
+ dev = __dev_get_by_name(&init_net, device);
+
+ if (dev == NULL) {
+ printk(KERN_INFO "%s() %s dev=NULL\n", __FUNCTION__, device);
+ goto done;
+ }
+
+ ctcm_pr_debug("ctcmpc:%s %s() called for device %s refcount=%d\n",
+ dev->name, __FUNCTION__,
+ dev->name, atomic_read(&dev->refcnt));
+
+ priv = dev->priv;
+ if (priv == NULL) {
+ printk(KERN_INFO "%s() %s priv=NULL\n",
+ __FUNCTION__, device);
+ goto done;
+ }
+ fsm_deltimer(&priv->restart_timer);
+
+ grp = priv->mpcg;
+ if (grp == NULL) {
+ printk(KERN_INFO "%s() %s dev=NULL\n", __FUNCTION__, device);
+ goto done;
+ }
+ grp->channels_terminating = 0;
+
+ fsm_deltimer(&grp->timer);
+
+ grp->allochanfunc = NULL;
+ grp->estconnfunc = NULL;
+ grp->port_persist = 0;
+ grp->send_qllc_disc = 0;
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+
+ ctcm_close(dev);
+done:
+ ctcm_pr_debug("ctcmpc exit: %s()\n", __FUNCTION__);
+ return;
+}
+EXPORT_SYMBOL(ctc_mpc_dealloc_ch);
+
+/*
+ * ctc_mpc_flow_control
+ * (exported interface)
+ */
+void ctc_mpc_flow_control(int port_num, int flowc)
+{
+ char device[20];
+ struct ctcm_priv *priv;
+ struct mpc_group *grp;
+ struct net_device *dev;
+ struct channel *rch;
+ int mpcg_state;
+
+ ctcm_pr_debug("ctcmpc enter: %s() %i\n", __FUNCTION__, flowc);
+
+ sprintf(device, "%s%i", MPC_DEVICE_NAME, port_num);
+ dev = __dev_get_by_name(&init_net, device);
+
+ if (dev == NULL) {
+ printk(KERN_INFO "ctc_mpc_flow_control %s dev=NULL\n", device);
+ return;
+ }
+
+ ctcm_pr_debug("ctcmpc: %s %s called \n", dev->name, __FUNCTION__);
+
+ priv = dev->priv;
+ if (priv == NULL) {
+ printk(KERN_INFO "ctcmpc:%s() %s priv=NULL\n",
+ __FUNCTION__, device);
+ return;
+ }
+ grp = priv->mpcg;
+ rch = priv->channel[READ];
+
+ mpcg_state = fsm_getstate(grp->fsm);
+ switch (flowc) {
+ case 1:
+ if (mpcg_state == MPCG_STATE_FLOWC)
+ break;
+ if (mpcg_state == MPCG_STATE_READY) {
+ if (grp->flow_off_called == 1)
+ grp->flow_off_called = 0;
+ else
+ fsm_newstate(grp->fsm, MPCG_STATE_FLOWC);
+ break;
+ }
+ break;
+ case 0:
+ if (mpcg_state == MPCG_STATE_FLOWC) {
+ fsm_newstate(grp->fsm, MPCG_STATE_READY);
+ /* ensure any data that has accumulated */
+ /* on the io_queue will now be sen t */
+ tasklet_schedule(&rch->ch_tasklet);
+ }
+ /* possible race condition */
+ if (mpcg_state == MPCG_STATE_READY) {
+ grp->flow_off_called = 1;
+ break;
+ }
+ break;
+ }
+
+ ctcm_pr_debug("ctcmpc exit: %s() %i\n", __FUNCTION__, flowc);
+}
+EXPORT_SYMBOL(ctc_mpc_flow_control);
+
+static int mpc_send_qllc_discontact(struct net_device *);
+
+/*
+ * helper function of ctcmpc_unpack_skb
+*/
+static void mpc_rcvd_sweep_resp(struct mpcg_info *mpcginfo)
+{
+ struct channel *rch = mpcginfo->ch;
+ struct net_device *dev = rch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+ struct channel *ch = priv->channel[WRITE];
+
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc enter: %s(): ch=0x%p id=%s\n",
+ __FUNCTION__, ch, ch->id);
+
+ if (do_debug_data)
+ ctcmpc_dumpit((char *)mpcginfo->sweep, TH_SWEEP_LENGTH);
+
+ grp->sweep_rsp_pend_num--;
+
+ if ((grp->sweep_req_pend_num == 0) &&
+ (grp->sweep_rsp_pend_num == 0)) {
+ fsm_deltimer(&ch->sweep_timer);
+ grp->in_sweep = 0;
+ rch->th_seq_num = 0x00;
+ ch->th_seq_num = 0x00;
+ ctcm_clear_busy_do(dev);
+ }
+
+ kfree(mpcginfo);
+
+ return;
+
+}
+
+/*
+ * helper function of mpc_rcvd_sweep_req
+ * which is a helper of ctcmpc_unpack_skb
+ */
+static void ctcmpc_send_sweep_resp(struct channel *rch)
+{
+ struct net_device *dev = rch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+ int rc = 0;
+ struct th_sweep *header;
+ struct sk_buff *sweep_skb;
+ struct channel *ch = priv->channel[WRITE];
+
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc exit : %s(): ch=0x%p id=%s\n",
+ __FUNCTION__, rch, rch->id);
+
+ sweep_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT,
+ GFP_ATOMIC|GFP_DMA);
+ if (sweep_skb == NULL) {
+ printk(KERN_INFO "Couldn't alloc sweep_skb\n");
+ rc = -ENOMEM;
+ goto done;
+ }
+
+ header = (struct th_sweep *)
+ kmalloc(sizeof(struct th_sweep), gfp_type());
+
+ if (!header) {
+ dev_kfree_skb_any(sweep_skb);
+ rc = -ENOMEM;
+ goto done;
+ }
+
+ header->th.th_seg = 0x00 ;
+ header->th.th_ch_flag = TH_SWEEP_RESP;
+ header->th.th_blk_flag = 0x00;
+ header->th.th_is_xid = 0x00;
+ header->th.th_seq_num = 0x00;
+ header->sw.th_last_seq = ch->th_seq_num;
+
+ memcpy(skb_put(sweep_skb, TH_SWEEP_LENGTH), header, TH_SWEEP_LENGTH);
+
+ kfree(header);
+
+ dev->trans_start = jiffies;
+ skb_queue_tail(&ch->sweep_queue, sweep_skb);
+
+ fsm_addtimer(&ch->sweep_timer, 100, CTC_EVENT_RSWEEP_TIMER, ch);
+
+ return;
+
+done:
+ if (rc != 0) {
+ grp->in_sweep = 0;
+ ctcm_clear_busy_do(dev);
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ }
+
+ return;
+}
+
+/*
+ * helper function of ctcmpc_unpack_skb
+ */
+static void mpc_rcvd_sweep_req(struct mpcg_info *mpcginfo)
+{
+ struct channel *rch = mpcginfo->ch;
+ struct net_device *dev = rch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+ struct channel *ch = priv->channel[WRITE];
+
+ if (do_debug)
+ CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
+ " %s(): ch=0x%p id=%s\n", __FUNCTION__, ch, ch->id);
+
+ if (grp->in_sweep == 0) {
+ grp->in_sweep = 1;
+ ctcm_test_and_set_busy(dev);
+ grp->sweep_req_pend_num = grp->active_channels[READ];
+ grp->sweep_rsp_pend_num = grp->active_channels[READ];
+ }
+
+ if (do_debug_data)
+ ctcmpc_dumpit((char *)mpcginfo->sweep, TH_SWEEP_LENGTH);
+
+ grp->sweep_req_pend_num--;
+ ctcmpc_send_sweep_resp(ch);
+ kfree(mpcginfo);
+ return;
+}
+
+/*
+ * MPC Group Station FSM definitions
+ */
+static const char *mpcg_event_names[] = {
+ [MPCG_EVENT_INOP] = "INOP Condition",
+ [MPCG_EVENT_DISCONC] = "Discontact Received",
+ [MPCG_EVENT_XID0DO] = "Channel Active - Start XID",
+ [MPCG_EVENT_XID2] = "XID2 Received",
+ [MPCG_EVENT_XID2DONE] = "XID0 Complete",
+ [MPCG_EVENT_XID7DONE] = "XID7 Complete",
+ [MPCG_EVENT_TIMER] = "XID Setup Timer",
+ [MPCG_EVENT_DOIO] = "XID DoIO",
+};
+
+static const char *mpcg_state_names[] = {
+ [MPCG_STATE_RESET] = "Reset",
+ [MPCG_STATE_INOP] = "INOP",
+ [MPCG_STATE_XID2INITW] = "Passive XID- XID0 Pending Start",
+ [MPCG_STATE_XID2INITX] = "Passive XID- XID0 Pending Complete",
+ [MPCG_STATE_XID7INITW] = "Passive XID- XID7 Pending P1 Start",
+ [MPCG_STATE_XID7INITX] = "Passive XID- XID7 Pending P2 Complete",
+ [MPCG_STATE_XID0IOWAIT] = "Active XID- XID0 Pending Start",
+ [MPCG_STATE_XID0IOWAIX] = "Active XID- XID0 Pending Complete",
+ [MPCG_STATE_XID7INITI] = "Active XID- XID7 Pending Start",
+ [MPCG_STATE_XID7INITZ] = "Active XID- XID7 Pending Complete ",
+ [MPCG_STATE_XID7INITF] = "XID - XID7 Complete ",
+ [MPCG_STATE_FLOWC] = "FLOW CONTROL ON",
+ [MPCG_STATE_READY] = "READY",
+};
+
+/*
+ * The MPC Group Station FSM
+ * 22 events
+ */
+static const fsm_node mpcg_fsm[] = {
+ { MPCG_STATE_RESET, MPCG_EVENT_INOP, mpc_action_go_inop },
+ { MPCG_STATE_INOP, MPCG_EVENT_INOP, mpc_action_nop },
+ { MPCG_STATE_FLOWC, MPCG_EVENT_INOP, mpc_action_go_inop },
+
+ { MPCG_STATE_READY, MPCG_EVENT_DISCONC, mpc_action_discontact },
+ { MPCG_STATE_READY, MPCG_EVENT_INOP, mpc_action_go_inop },
+
+ { MPCG_STATE_XID2INITW, MPCG_EVENT_XID0DO, mpc_action_doxid0 },
+ { MPCG_STATE_XID2INITW, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 },
+ { MPCG_STATE_XID2INITW, MPCG_EVENT_INOP, mpc_action_go_inop },
+ { MPCG_STATE_XID2INITW, MPCG_EVENT_TIMER, mpc_action_timeout },
+ { MPCG_STATE_XID2INITW, MPCG_EVENT_DOIO, mpc_action_yside_xid },
+
+ { MPCG_STATE_XID2INITX, MPCG_EVENT_XID0DO, mpc_action_doxid0 },
+ { MPCG_STATE_XID2INITX, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 },
+ { MPCG_STATE_XID2INITX, MPCG_EVENT_INOP, mpc_action_go_inop },
+ { MPCG_STATE_XID2INITX, MPCG_EVENT_TIMER, mpc_action_timeout },
+ { MPCG_STATE_XID2INITX, MPCG_EVENT_DOIO, mpc_action_yside_xid },
+
+ { MPCG_STATE_XID7INITW, MPCG_EVENT_XID2DONE, mpc_action_doxid7 },
+ { MPCG_STATE_XID7INITW, MPCG_EVENT_DISCONC, mpc_action_discontact },
+ { MPCG_STATE_XID7INITW, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 },
+ { MPCG_STATE_XID7INITW, MPCG_EVENT_INOP, mpc_action_go_inop },
+ { MPCG_STATE_XID7INITW, MPCG_EVENT_TIMER, mpc_action_timeout },
+ { MPCG_STATE_XID7INITW, MPCG_EVENT_XID7DONE, mpc_action_doxid7 },
+ { MPCG_STATE_XID7INITW, MPCG_EVENT_DOIO, mpc_action_yside_xid },
+
+ { MPCG_STATE_XID7INITX, MPCG_EVENT_DISCONC, mpc_action_discontact },
+ { MPCG_STATE_XID7INITX, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 },
+ { MPCG_STATE_XID7INITX, MPCG_EVENT_INOP, mpc_action_go_inop },
+ { MPCG_STATE_XID7INITX, MPCG_EVENT_XID7DONE, mpc_action_doxid7 },
+ { MPCG_STATE_XID7INITX, MPCG_EVENT_TIMER, mpc_action_timeout },
+ { MPCG_STATE_XID7INITX, MPCG_EVENT_DOIO, mpc_action_yside_xid },
+
+ { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_XID0DO, mpc_action_doxid0 },
+ { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_DISCONC, mpc_action_discontact },
+ { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 },
+ { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_INOP, mpc_action_go_inop },
+ { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_TIMER, mpc_action_timeout },
+ { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_DOIO, mpc_action_xside_xid },
+
+ { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_XID0DO, mpc_action_doxid0 },
+ { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_DISCONC, mpc_action_discontact },
+ { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 },
+ { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_INOP, mpc_action_go_inop },
+ { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_TIMER, mpc_action_timeout },
+ { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_DOIO, mpc_action_xside_xid },
+
+ { MPCG_STATE_XID7INITI, MPCG_EVENT_XID2DONE, mpc_action_doxid7 },
+ { MPCG_STATE_XID7INITI, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 },
+ { MPCG_STATE_XID7INITI, MPCG_EVENT_DISCONC, mpc_action_discontact },
+ { MPCG_STATE_XID7INITI, MPCG_EVENT_INOP, mpc_action_go_inop },
+ { MPCG_STATE_XID7INITI, MPCG_EVENT_TIMER, mpc_action_timeout },
+ { MPCG_STATE_XID7INITI, MPCG_EVENT_XID7DONE, mpc_action_doxid7 },
+ { MPCG_STATE_XID7INITI, MPCG_EVENT_DOIO, mpc_action_xside_xid },
+
+ { MPCG_STATE_XID7INITZ, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 },
+ { MPCG_STATE_XID7INITZ, MPCG_EVENT_XID7DONE, mpc_action_doxid7 },
+ { MPCG_STATE_XID7INITZ, MPCG_EVENT_DISCONC, mpc_action_discontact },
+ { MPCG_STATE_XID7INITZ, MPCG_EVENT_INOP, mpc_action_go_inop },
+ { MPCG_STATE_XID7INITZ, MPCG_EVENT_TIMER, mpc_action_timeout },
+ { MPCG_STATE_XID7INITZ, MPCG_EVENT_DOIO, mpc_action_xside_xid },
+
+ { MPCG_STATE_XID7INITF, MPCG_EVENT_INOP, mpc_action_go_inop },
+ { MPCG_STATE_XID7INITF, MPCG_EVENT_XID7DONE, mpc_action_go_ready },
+};
+
+static int mpcg_fsm_len = ARRAY_SIZE(mpcg_fsm);
+
+/*
+ * MPC Group Station FSM action
+ * CTCM_PROTO_MPC only
+ */
+static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg)
+{
+ struct net_device *dev = arg;
+ struct ctcm_priv *priv = NULL;
+ struct mpc_group *grp = NULL;
+
+ if (dev == NULL) {
+ printk(KERN_INFO "%s() dev=NULL\n", __FUNCTION__);
+ return;
+ }
+
+ ctcm_pr_debug("ctcmpc enter: %s %s()\n", dev->name, __FUNCTION__);
+
+ priv = dev->priv;
+ if (priv == NULL) {
+ printk(KERN_INFO "%s() priv=NULL\n", __FUNCTION__);
+ return;
+ }
+
+ grp = priv->mpcg;
+ if (grp == NULL) {
+ printk(KERN_INFO "%s() grp=NULL\n", __FUNCTION__);
+ return;
+ }
+
+ fsm_deltimer(&grp->timer);
+
+ if (grp->saved_xid2->xid2_flag2 == 0x40) {
+ priv->xid->xid2_flag2 = 0x00;
+ if (grp->estconnfunc) {
+ grp->estconnfunc(grp->port_num, 1,
+ grp->group_max_buflen);
+ grp->estconnfunc = NULL;
+ } else if (grp->allochanfunc)
+ grp->send_qllc_disc = 1;
+ goto done;
+ }
+
+ grp->port_persist = 1;
+ grp->out_of_sequence = 0;
+ grp->estconn_called = 0;
+
+ tasklet_hi_schedule(&grp->mpc_tasklet2);
+
+ ctcm_pr_debug("ctcmpc exit: %s %s()\n", dev->name, __FUNCTION__);
+ return;
+
+done:
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+
+
+ ctcm_pr_info("ctcmpc: %s()failure occurred\n", __FUNCTION__);
+}
+
+/*
+ * helper of ctcm_init_netdevice
+ * CTCM_PROTO_MPC only
+ */
+void mpc_group_ready(unsigned long adev)
+{
+ struct net_device *dev = (struct net_device *)adev;
+ struct ctcm_priv *priv = NULL;
+ struct mpc_group *grp = NULL;
+ struct channel *ch = NULL;
+
+
+ ctcm_pr_debug("ctcmpc enter: %s()\n", __FUNCTION__);
+
+ if (dev == NULL) {
+ printk(KERN_INFO "%s() dev=NULL\n", __FUNCTION__);
+ return;
+ }
+
+ priv = dev->priv;
+ if (priv == NULL) {
+ printk(KERN_INFO "%s() priv=NULL\n", __FUNCTION__);
+ return;
+ }
+
+ grp = priv->mpcg;
+ if (grp == NULL) {
+ printk(KERN_INFO "ctcmpc:%s() grp=NULL\n", __FUNCTION__);
+ return;
+ }
+
+ printk(KERN_NOTICE "ctcmpc: %s GROUP TRANSITIONED TO READY"
+ " maxbuf:%d\n",
+ dev->name, grp->group_max_buflen);
+
+ fsm_newstate(grp->fsm, MPCG_STATE_READY);
+
+ /* Put up a read on the channel */
+ ch = priv->channel[READ];
+ ch->pdu_seq = 0;
+ if (do_debug_data)
+ ctcm_pr_debug("ctcmpc: %s() ToDCM_pdu_seq= %08x\n" ,
+ __FUNCTION__, ch->pdu_seq);
+
+ ctcmpc_chx_rxidle(ch->fsm, CTC_EVENT_START, ch);
+ /* Put the write channel in idle state */
+ ch = priv->channel[WRITE];
+ if (ch->collect_len > 0) {
+ spin_lock(&ch->collect_lock);
+ ctcm_purge_skb_queue(&ch->collect_queue);
+ ch->collect_len = 0;
+ spin_unlock(&ch->collect_lock);
+ }
+ ctcm_chx_txidle(ch->fsm, CTC_EVENT_START, ch);
+
+ ctcm_clear_busy(dev);
+
+ if (grp->estconnfunc) {
+ grp->estconnfunc(grp->port_num, 0,
+ grp->group_max_buflen);
+ grp->estconnfunc = NULL;
+ } else
+ if (grp->allochanfunc)
+ grp->allochanfunc(grp->port_num,
+ grp->group_max_buflen);
+
+ grp->send_qllc_disc = 1;
+ grp->changed_side = 0;
+
+ ctcm_pr_debug("ctcmpc exit: %s()\n", __FUNCTION__);
+ return;
+
+}
+
+/*
+ * Increment the MPC Group Active Channel Counts
+ * helper of dev_action (called from channel fsm)
+ */
+int mpc_channel_action(struct channel *ch, int direction, int action)
+{
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv;
+ struct mpc_group *grp = NULL;
+ int rc = 0;
+
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc enter: %s(): ch=0x%p id=%s\n",
+ __FUNCTION__, ch, ch->id);
+
+ if (dev == NULL) {
+ printk(KERN_INFO "ctcmpc_channel_action %i dev=NULL\n",
+ action);
+ rc = 1;
+ goto done;
+ }
+
+ priv = dev->priv;
+ if (priv == NULL) {
+ printk(KERN_INFO
+ "ctcmpc_channel_action%i priv=NULL, dev=%s\n",
+ action, dev->name);
+ rc = 2;
+ goto done;
+ }
+
+ grp = priv->mpcg;
+
+ if (grp == NULL) {
+ printk(KERN_INFO "ctcmpc: %s()%i mpcgroup=NULL, dev=%s\n",
+ __FUNCTION__, action, dev->name);
+ rc = 3;
+ goto done;
+ }
+
+ ctcm_pr_info(
+ "ctcmpc: %s() %i(): Grp:%s total_channel_paths=%i "
+ "active_channels read=%i, write=%i\n",
+ __FUNCTION__,
+ action,
+ fsm_getstate_str(grp->fsm),
+ grp->num_channel_paths,
+ grp->active_channels[READ],
+ grp->active_channels[WRITE]);
+
+ if ((action == MPC_CHANNEL_ADD) && (ch->in_mpcgroup == 0)) {
+ grp->num_channel_paths++;
+ grp->active_channels[direction]++;
+ grp->outstanding_xid2++;
+ ch->in_mpcgroup = 1;
+
+ if (ch->xid_skb != NULL)
+ dev_kfree_skb_any(ch->xid_skb);
+
+ ch->xid_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT,
+ GFP_ATOMIC | GFP_DMA);
+ if (ch->xid_skb == NULL) {
+ printk(KERN_INFO "ctcmpc: %s()"
+ "Couldn't alloc ch xid_skb\n", __FUNCTION__);
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ return 1;
+ }
+ ch->xid_skb_data = ch->xid_skb->data;
+ ch->xid_th = (struct th_header *)ch->xid_skb->data;
+ skb_put(ch->xid_skb, TH_HEADER_LENGTH);
+ ch->xid = (struct xid2 *)skb_tail_pointer(ch->xid_skb);
+ skb_put(ch->xid_skb, XID2_LENGTH);
+ ch->xid_id = skb_tail_pointer(ch->xid_skb);
+ ch->xid_skb->data = ch->xid_skb_data;
+ skb_reset_tail_pointer(ch->xid_skb);
+ ch->xid_skb->len = 0;
+
+ memcpy(skb_put(ch->xid_skb, grp->xid_skb->len),
+ grp->xid_skb->data,
+ grp->xid_skb->len);
+
+ ch->xid->xid2_dlc_type = ((CHANNEL_DIRECTION(ch->flags) == READ)
+ ? XID2_READ_SIDE : XID2_WRITE_SIDE);
+
+ if (CHANNEL_DIRECTION(ch->flags) == WRITE)
+ ch->xid->xid2_buf_len = 0x00;
+
+ ch->xid_skb->data = ch->xid_skb_data;
+ skb_reset_tail_pointer(ch->xid_skb);
+ ch->xid_skb->len = 0;
+
+ fsm_newstate(ch->fsm, CH_XID0_PENDING);
+
+ if ((grp->active_channels[READ] > 0) &&
+ (grp->active_channels[WRITE] > 0) &&
+ (fsm_getstate(grp->fsm) < MPCG_STATE_XID2INITW)) {
+ fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);
+ printk(KERN_NOTICE "ctcmpc: %s MPC GROUP "
+ "CHANNELS ACTIVE\n", dev->name);
+ }
+ } else if ((action == MPC_CHANNEL_REMOVE) &&
+ (ch->in_mpcgroup == 1)) {
+ ch->in_mpcgroup = 0;
+ grp->num_channel_paths--;
+ grp->active_channels[direction]--;
+
+ if (ch->xid_skb != NULL)
+ dev_kfree_skb_any(ch->xid_skb);
+ ch->xid_skb = NULL;
+
+ if (grp->channels_terminating)
+ goto done;
+
+ if (((grp->active_channels[READ] == 0) &&
+ (grp->active_channels[WRITE] > 0))
+ || ((grp->active_channels[WRITE] == 0) &&
+ (grp->active_channels[READ] > 0)))
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ }
+
+done:
+
+ if (do_debug) {
+ ctcm_pr_debug(
+ "ctcmpc: %s() %i Grp:%s ttl_chan_paths=%i "
+ "active_chans read=%i, write=%i\n",
+ __FUNCTION__,
+ action,
+ fsm_getstate_str(grp->fsm),
+ grp->num_channel_paths,
+ grp->active_channels[READ],
+ grp->active_channels[WRITE]);
+
+ ctcm_pr_debug("ctcmpc exit : %s(): ch=0x%p id=%s\n",
+ __FUNCTION__, ch, ch->id);
+ }
+ return rc;
+
+}
+
+/**
+ * Unpack a just received skb and hand it over to
+ * upper layers.
+ * special MPC version of unpack_skb.
+ *
+ * ch The channel where this skb has been received.
+ * pskb The received skb.
+ */
+static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb)
+{
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+ struct pdu *curr_pdu;
+ struct mpcg_info *mpcginfo;
+ struct th_header *header = NULL;
+ struct th_sweep *sweep = NULL;
+ int pdu_last_seen = 0;
+ __u32 new_len;
+ struct sk_buff *skb;
+ int skblen;
+ int sendrc = 0;
+
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc enter: %s() %s cp:%i ch:%s\n",
+ __FUNCTION__, dev->name, smp_processor_id(), ch->id);
+
+ header = (struct th_header *)pskb->data;
+ if ((header->th_seg == 0) &&
+ (header->th_ch_flag == 0) &&
+ (header->th_blk_flag == 0) &&
+ (header->th_seq_num == 0))
+ /* nothing for us */ goto done;
+
+ if (do_debug_data) {
+ ctcm_pr_debug("ctcmpc: %s() th_header\n", __FUNCTION__);
+ ctcmpc_dumpit((char *)header, TH_HEADER_LENGTH);
+ ctcm_pr_debug("ctcmpc: %s() pskb len: %04x \n",
+ __FUNCTION__, pskb->len);
+ }
+
+ pskb->dev = dev;
+ pskb->ip_summed = CHECKSUM_UNNECESSARY;
+ skb_pull(pskb, TH_HEADER_LENGTH);
+
+ if (likely(header->th_ch_flag == TH_HAS_PDU)) {
+ if (do_debug_data)
+ ctcm_pr_debug("ctcmpc: %s() came into th_has_pdu\n",
+ __FUNCTION__);
+ if ((fsm_getstate(grp->fsm) == MPCG_STATE_FLOWC) ||
+ ((fsm_getstate(grp->fsm) == MPCG_STATE_READY) &&
+ (header->th_seq_num != ch->th_seq_num + 1) &&
+ (ch->th_seq_num != 0))) {
+ /* This is NOT the next segment *
+ * we are not the correct race winner *
+ * go away and let someone else win *
+ * BUT..this only applies if xid negot *
+ * is done *
+ */
+ grp->out_of_sequence += 1;
+ __skb_push(pskb, TH_HEADER_LENGTH);
+ skb_queue_tail(&ch->io_queue, pskb);
+ if (do_debug_data)
+ ctcm_pr_debug("ctcmpc: %s() th_seq_num "
+ "expect:%08x got:%08x\n", __FUNCTION__,
+ ch->th_seq_num + 1, header->th_seq_num);
+
+ return;
+ }
+ grp->out_of_sequence = 0;
+ ch->th_seq_num = header->th_seq_num;
+
+ if (do_debug_data)
+ ctcm_pr_debug("ctcmpc: %s() FromVTAM_th_seq=%08x\n",
+ __FUNCTION__, ch->th_seq_num);
+
+ if (unlikely(fsm_getstate(grp->fsm) != MPCG_STATE_READY))
+ goto done;
+ pdu_last_seen = 0;
+ while ((pskb->len > 0) && !pdu_last_seen) {
+ curr_pdu = (struct pdu *)pskb->data;
+ if (do_debug_data) {
+ ctcm_pr_debug("ctcm: %s() pdu_header\n",
+ __FUNCTION__);
+ ctcmpc_dumpit((char *)pskb->data,
+ PDU_HEADER_LENGTH);
+ ctcm_pr_debug("ctcm: %s() pskb len: %04x \n",
+ __FUNCTION__, pskb->len);
+ }
+ skb_pull(pskb, PDU_HEADER_LENGTH);
+
+ if (curr_pdu->pdu_flag & PDU_LAST)
+ pdu_last_seen = 1;
+ if (curr_pdu->pdu_flag & PDU_CNTL)
+ pskb->protocol = htons(ETH_P_SNAP);
+ else
+ pskb->protocol = htons(ETH_P_SNA_DIX);
+
+ if ((pskb->len <= 0) || (pskb->len > ch->max_bufsize)) {
+ printk(KERN_INFO
+ "%s Illegal packet size %d "
+ "received "
+ "dropping\n", dev->name,
+ pskb->len);
+ priv->stats.rx_dropped++;
+ priv->stats.rx_length_errors++;
+ goto done;
+ }
+ skb_reset_mac_header(pskb);
+ new_len = curr_pdu->pdu_offset;
+ if (do_debug_data)
+ ctcm_pr_debug("ctcmpc: %s() new_len: %04x \n",
+ __FUNCTION__, new_len);
+ if ((new_len == 0) || (new_len > pskb->len)) {
+ /* should never happen */
+ /* pskb len must be hosed...bail out */
+ printk(KERN_INFO
+ "ctcmpc: %s(): invalid pdu"
+ " offset of %04x - data may be"
+ "lost\n", __FUNCTION__, new_len);
+ goto done;
+ }
+ skb = __dev_alloc_skb(new_len+4, GFP_ATOMIC);
+
+ if (!skb) {
+ printk(KERN_INFO
+ "ctcm: %s Out of memory in "
+ "%s()- request-len:%04x \n",
+ dev->name,
+ __FUNCTION__,
+ new_len+4);
+ priv->stats.rx_dropped++;
+ fsm_event(grp->fsm,
+ MPCG_EVENT_INOP, dev);
+ goto done;
+ }
+
+ memcpy(skb_put(skb, new_len),
+ pskb->data, new_len);
+
+ skb_reset_mac_header(skb);
+ skb->dev = pskb->dev;
+ skb->protocol = pskb->protocol;
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ *((__u32 *) skb_push(skb, 4)) = ch->pdu_seq;
+ ch->pdu_seq++;
+
+ if (do_debug_data)
+ ctcm_pr_debug("%s: ToDCM_pdu_seq= %08x\n",
+ __FUNCTION__, ch->pdu_seq);
+
+ ctcm_pr_debug("ctcm: %s() skb:%0lx "
+ "skb len: %d \n", __FUNCTION__,
+ (unsigned long)skb, skb->len);
+ if (do_debug_data) {
+ ctcm_pr_debug("ctcmpc: %s() up to 32 bytes"
+ " of pdu_data sent\n",
+ __FUNCTION__);
+ ctcmpc_dump32((char *)skb->data, skb->len);
+ }
+
+ skblen = skb->len;
+ sendrc = netif_rx(skb);
+ priv->stats.rx_packets++;
+ priv->stats.rx_bytes += skblen;
+ skb_pull(pskb, new_len); /* point to next PDU */
+ }
+ } else {
+ mpcginfo = (struct mpcg_info *)
+ kmalloc(sizeof(struct mpcg_info), gfp_type());
+ if (mpcginfo == NULL)
+ goto done;
+
+ mpcginfo->ch = ch;
+ mpcginfo->th = header;
+ mpcginfo->skb = pskb;
+ ctcm_pr_debug("ctcmpc: %s() Not PDU - may be control pkt\n",
+ __FUNCTION__);
+ /* it's a sweep? */
+ sweep = (struct th_sweep *)pskb->data;
+ mpcginfo->sweep = sweep;
+ if (header->th_ch_flag == TH_SWEEP_REQ)
+ mpc_rcvd_sweep_req(mpcginfo);
+ else if (header->th_ch_flag == TH_SWEEP_RESP)
+ mpc_rcvd_sweep_resp(mpcginfo);
+ else if (header->th_blk_flag == TH_DATA_IS_XID) {
+ struct xid2 *thisxid = (struct xid2 *)pskb->data;
+ skb_pull(pskb, XID2_LENGTH);
+ mpcginfo->xid = thisxid;
+ fsm_event(grp->fsm, MPCG_EVENT_XID2, mpcginfo);
+ } else if (header->th_blk_flag == TH_DISCONTACT)
+ fsm_event(grp->fsm, MPCG_EVENT_DISCONC, mpcginfo);
+ else if (header->th_seq_num != 0) {
+ printk(KERN_INFO "%s unexpected packet"
+ " expected control pkt\n", dev->name);
+ priv->stats.rx_dropped++;
+ /* mpcginfo only used for non-data transfers */
+ kfree(mpcginfo);
+ if (do_debug_data)
+ ctcmpc_dump_skb(pskb, -8);
+ }
+ }
+done:
+
+ dev_kfree_skb_any(pskb);
+ if (sendrc == NET_RX_DROP) {
+ printk(KERN_WARNING "%s %s() NETWORK BACKLOG EXCEEDED"
+ " - PACKET DROPPED\n", dev->name, __FUNCTION__);
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ }
+
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc exit : %s %s(): ch=0x%p id=%s\n",
+ dev->name, __FUNCTION__, ch, ch->id);
+}
+
+/**
+ * tasklet helper for mpc's skb unpacking.
+ *
+ * ch The channel to work on.
+ * Allow flow control back pressure to occur here.
+ * Throttling back channel can result in excessive
+ * channel inactivity and system deact of channel
+ */
+void ctcmpc_bh(unsigned long thischan)
+{
+ struct channel *ch = (struct channel *)thischan;
+ struct sk_buff *skb;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+
+ if (do_debug)
+ ctcm_pr_debug("%s cp:%i enter: %s() %s\n",
+ dev->name, smp_processor_id(), __FUNCTION__, ch->id);
+ /* caller has requested driver to throttle back */
+ while ((fsm_getstate(grp->fsm) != MPCG_STATE_FLOWC) &&
+ (skb = skb_dequeue(&ch->io_queue))) {
+ ctcmpc_unpack_skb(ch, skb);
+ if (grp->out_of_sequence > 20) {
+ /* assume data loss has occurred if */
+ /* missing seq_num for extended */
+ /* period of time */
+ grp->out_of_sequence = 0;
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ break;
+ }
+ if (skb == skb_peek(&ch->io_queue))
+ break;
+ }
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc exit : %s %s(): ch=0x%p id=%s\n",
+ dev->name, __FUNCTION__, ch, ch->id);
+ return;
+}
+
+/*
+ * MPC Group Initializations
+ */
+struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv)
+{
+ struct mpc_group *grp;
+
+ CTCM_DBF_TEXT(MPC_SETUP, 3, __FUNCTION__);
+
+ grp = kzalloc(sizeof(struct mpc_group), GFP_KERNEL);
+ if (grp == NULL)
+ return NULL;
+
+ grp->fsm =
+ init_fsm("mpcg", mpcg_state_names, mpcg_event_names,
+ MPCG_NR_STATES, MPCG_NR_EVENTS, mpcg_fsm,
+ mpcg_fsm_len, GFP_KERNEL);
+ if (grp->fsm == NULL) {
+ kfree(grp);
+ return NULL;
+ }
+
+ fsm_newstate(grp->fsm, MPCG_STATE_RESET);
+ fsm_settimer(grp->fsm, &grp->timer);
+
+ grp->xid_skb =
+ __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA);
+ if (grp->xid_skb == NULL) {
+ printk(KERN_INFO "Couldn't alloc MPCgroup xid_skb\n");
+ kfree_fsm(grp->fsm);
+ kfree(grp);
+ return NULL;
+ }
+ /* base xid for all channels in group */
+ grp->xid_skb_data = grp->xid_skb->data;
+ grp->xid_th = (struct th_header *)grp->xid_skb->data;
+ memcpy(skb_put(grp->xid_skb, TH_HEADER_LENGTH),
+ &thnorm, TH_HEADER_LENGTH);
+
+ grp->xid = (struct xid2 *) skb_tail_pointer(grp->xid_skb);
+ memcpy(skb_put(grp->xid_skb, XID2_LENGTH), &init_xid, XID2_LENGTH);
+ grp->xid->xid2_adj_id = jiffies | 0xfff00000;
+ grp->xid->xid2_sender_id = jiffies;
+
+ grp->xid_id = skb_tail_pointer(grp->xid_skb);
+ memcpy(skb_put(grp->xid_skb, 4), "VTAM", 4);
+
+ grp->rcvd_xid_skb =
+ __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC|GFP_DMA);
+ if (grp->rcvd_xid_skb == NULL) {
+ printk(KERN_INFO "Couldn't alloc MPCgroup rcvd_xid_skb\n");
+ kfree_fsm(grp->fsm);
+ dev_kfree_skb(grp->xid_skb);
+ kfree(grp);
+ return NULL;
+ }
+ grp->rcvd_xid_data = grp->rcvd_xid_skb->data;
+ grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data;
+ memcpy(skb_put(grp->rcvd_xid_skb, TH_HEADER_LENGTH),
+ &thnorm, TH_HEADER_LENGTH);
+ grp->saved_xid2 = NULL;
+ priv->xid = grp->xid;
+ priv->mpcg = grp;
+ return grp;
+}
+
+/*
+ * The MPC Group Station FSM
+ */
+
+/*
+ * MPC Group Station FSM actions
+ * CTCM_PROTO_MPC only
+ */
+
+/**
+ * NOP action for statemachines
+ */
+static void mpc_action_nop(fsm_instance *fi, int event, void *arg)
+{
+}
+
+/*
+ * invoked when the device transitions to dev_stopped
+ * MPC will stop each individual channel if a single XID failure
+ * occurs, or will intitiate all channels be stopped if a GROUP
+ * level failure occurs.
+ */
+static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg)
+{
+ struct net_device *dev = arg;
+ struct ctcm_priv *priv;
+ struct mpc_group *grp;
+ int rc = 0;
+ struct channel *wch, *rch;
+
+ if (dev == NULL) {
+ printk(KERN_INFO "%s() dev=NULL\n", __FUNCTION__);
+ return;
+ }
+
+ ctcm_pr_debug("ctcmpc enter: %s %s()\n", dev->name, __FUNCTION__);
+
+ priv = dev->priv;
+ grp = priv->mpcg;
+ grp->flow_off_called = 0;
+
+ fsm_deltimer(&grp->timer);
+
+ if (grp->channels_terminating)
+ goto done;
+
+ grp->channels_terminating = 1;
+
+ grp->saved_state = fsm_getstate(grp->fsm);
+ fsm_newstate(grp->fsm, MPCG_STATE_INOP);
+ if (grp->saved_state > MPCG_STATE_XID7INITF)
+ printk(KERN_NOTICE "%s:MPC GROUP INOPERATIVE\n", dev->name);
+ if ((grp->saved_state != MPCG_STATE_RESET) ||
+ /* dealloc_channel has been called */
+ ((grp->saved_state == MPCG_STATE_RESET) &&
+ (grp->port_persist == 0)))
+ fsm_deltimer(&priv->restart_timer);
+
+ wch = priv->channel[WRITE];
+ rch = priv->channel[READ];
+
+ switch (grp->saved_state) {
+ case MPCG_STATE_RESET:
+ case MPCG_STATE_INOP:
+ case MPCG_STATE_XID2INITW:
+ case MPCG_STATE_XID0IOWAIT:
+ case MPCG_STATE_XID2INITX:
+ case MPCG_STATE_XID7INITW:
+ case MPCG_STATE_XID7INITX:
+ case MPCG_STATE_XID0IOWAIX:
+ case MPCG_STATE_XID7INITI:
+ case MPCG_STATE_XID7INITZ:
+ case MPCG_STATE_XID7INITF:
+ break;
+ case MPCG_STATE_FLOWC:
+ case MPCG_STATE_READY:
+ default:
+ tasklet_hi_schedule(&wch->ch_disc_tasklet);
+ }
+
+ grp->xid2_tgnum = 0;
+ grp->group_max_buflen = 0; /*min of all received */
+ grp->outstanding_xid2 = 0;
+ grp->outstanding_xid7 = 0;
+ grp->outstanding_xid7_p2 = 0;
+ grp->saved_xid2 = NULL;
+ grp->xidnogood = 0;
+ grp->changed_side = 0;
+
+ grp->rcvd_xid_skb->data = grp->rcvd_xid_data;
+ skb_reset_tail_pointer(grp->rcvd_xid_skb);
+ grp->rcvd_xid_skb->len = 0;
+ grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data;
+ memcpy(skb_put(grp->rcvd_xid_skb, TH_HEADER_LENGTH), &thnorm,
+ TH_HEADER_LENGTH);
+
+ if (grp->send_qllc_disc == 1) {
+ grp->send_qllc_disc = 0;
+ rc = mpc_send_qllc_discontact(dev);
+ }
+
+ /* DO NOT issue DEV_EVENT_STOP directly out of this code */
+ /* This can result in INOP of VTAM PU due to halting of */
+ /* outstanding IO which causes a sense to be returned */
+ /* Only about 3 senses are allowed and then IOS/VTAM will*/
+ /* ebcome unreachable without manual intervention */
+ if ((grp->port_persist == 1) || (grp->alloc_called)) {
+ grp->alloc_called = 0;
+ fsm_deltimer(&priv->restart_timer);
+ fsm_addtimer(&priv->restart_timer,
+ 500,
+ DEV_EVENT_RESTART,
+ dev);
+ fsm_newstate(grp->fsm, MPCG_STATE_RESET);
+ if (grp->saved_state > MPCG_STATE_XID7INITF)
+ printk(KERN_NOTICE "%s:MPC GROUP RECOVERY SCHEDULED\n",
+ dev->name);
+ } else {
+ fsm_deltimer(&priv->restart_timer);
+ fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_STOP, dev);
+ fsm_newstate(grp->fsm, MPCG_STATE_RESET);
+ printk(KERN_NOTICE "%s:MPC GROUP RECOVERY NOT ATTEMPTED\n",
+ dev->name);
+ }
+
+done:
+ ctcm_pr_debug("ctcmpc exit:%s %s()\n", dev->name, __FUNCTION__);
+ return;
+}
+
+/**
+ * Handle mpc group action timeout.
+ * MPC Group Station FSM action
+ * CTCM_PROTO_MPC only
+ *
+ * fi An instance of an mpc_group fsm.
+ * event The event, just happened.
+ * arg Generic pointer, casted from net_device * upon call.
+ */
+static void mpc_action_timeout(fsm_instance *fi, int event, void *arg)
+{
+ struct net_device *dev = arg;
+ struct ctcm_priv *priv;
+ struct mpc_group *grp;
+ struct channel *wch;
+ struct channel *rch;
+
+ CTCM_DBF_TEXT(MPC_TRACE, 6, __FUNCTION__);
+
+ if (dev == NULL) {
+ CTCM_DBF_TEXT_(MPC_ERROR, 4, "%s: dev=NULL\n", __FUNCTION__);
+ return;
+ }
+
+ priv = dev->priv;
+ grp = priv->mpcg;
+ wch = priv->channel[WRITE];
+ rch = priv->channel[READ];
+
+ switch (fsm_getstate(grp->fsm)) {
+ case MPCG_STATE_XID2INITW:
+ /* Unless there is outstanding IO on the */
+ /* channel just return and wait for ATTN */
+ /* interrupt to begin XID negotiations */
+ if ((fsm_getstate(rch->fsm) == CH_XID0_PENDING) &&
+ (fsm_getstate(wch->fsm) == CH_XID0_PENDING))
+ break;
+ default:
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ }
+
+ CTCM_DBF_TEXT_(MPC_TRACE, 6, "%s: dev=%s exit",
+ __FUNCTION__, dev->name);
+ return;
+}
+
+/*
+ * MPC Group Station FSM action
+ * CTCM_PROTO_MPC only
+ */
+void mpc_action_discontact(fsm_instance *fi, int event, void *arg)
+{
+ struct mpcg_info *mpcginfo = arg;
+ struct channel *ch = mpcginfo->ch;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+
+ if (ch == NULL) {
+ printk(KERN_INFO "%s() ch=NULL\n", __FUNCTION__);
+ return;
+ }
+ if (ch->netdev == NULL) {
+ printk(KERN_INFO "%s() dev=NULL\n", __FUNCTION__);
+ return;
+ }
+
+ ctcm_pr_debug("ctcmpc enter: %s %s()\n", dev->name, __FUNCTION__);
+
+ grp->send_qllc_disc = 1;
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+
+ ctcm_pr_debug("ctcmpc exit: %s %s()\n", dev->name, __FUNCTION__);
+ return;
+}
+
+/*
+ * MPC Group Station - not part of FSM
+ * CTCM_PROTO_MPC only
+ * called from add_channel in ctcm_main.c
+ */
+void mpc_action_send_discontact(unsigned long thischan)
+{
+ struct channel *ch;
+ struct net_device *dev;
+ struct ctcm_priv *priv;
+ struct mpc_group *grp;
+ int rc = 0;
+ unsigned long saveflags;
+
+ ch = (struct channel *)thischan;
+ dev = ch->netdev;
+ priv = dev->priv;
+ grp = priv->mpcg;
+
+ ctcm_pr_info("ctcmpc: %s cp:%i enter: %s() GrpState:%s ChState:%s\n",
+ dev->name,
+ smp_processor_id(),
+ __FUNCTION__,
+ fsm_getstate_str(grp->fsm),
+ fsm_getstate_str(ch->fsm));
+ saveflags = 0; /* avoids compiler warning with
+ spin_unlock_irqrestore */
+
+ spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
+ rc = ccw_device_start(ch->cdev, &ch->ccw[15],
+ (unsigned long)ch, 0xff, 0);
+ spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
+
+ if (rc != 0) {
+ ctcm_pr_info("ctcmpc: %s() ch:%s IO failed \n",
+ __FUNCTION__,
+ ch->id);
+ ctcm_ccw_check_rc(ch, rc, "send discontact");
+ /* Not checking return code value here */
+ /* Making best effort to notify partner*/
+ /* that MPC Group is going down */
+ }
+
+ ctcm_pr_debug("ctcmpc exit: %s %s()\n", dev->name, __FUNCTION__);
+ return;
+}
+
+
+/*
+ * helper function of mpc FSM
+ * CTCM_PROTO_MPC only
+ * mpc_action_rcvd_xid7
+*/
+static int mpc_validate_xid(struct mpcg_info *mpcginfo)
+{
+ struct channel *ch = mpcginfo->ch;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+ struct xid2 *xid = mpcginfo->xid;
+ int failed = 0;
+ int rc = 0;
+ __u64 our_id, their_id = 0;
+ int len;
+
+ len = TH_HEADER_LENGTH + PDU_HEADER_LENGTH;
+
+ ctcm_pr_debug("ctcmpc enter: %s()\n", __FUNCTION__);
+
+ if (mpcginfo->xid == NULL) {
+ printk(KERN_INFO "%s() xid=NULL\n", __FUNCTION__);
+ rc = 1;
+ goto done;
+ }
+
+ ctcm_pr_debug("ctcmpc : %s xid received()\n", __FUNCTION__);
+ ctcmpc_dumpit((char *)mpcginfo->xid, XID2_LENGTH);
+
+ /*the received direction should be the opposite of ours */
+ if (((CHANNEL_DIRECTION(ch->flags) == READ) ? XID2_WRITE_SIDE :
+ XID2_READ_SIDE) != xid->xid2_dlc_type) {
+ failed = 1;
+ printk(KERN_INFO "ctcmpc:%s() XID REJECTED - READ-WRITE CH "
+ "Pairing Invalid \n", __FUNCTION__);
+ }
+
+ if (xid->xid2_dlc_type == XID2_READ_SIDE) {
+ ctcm_pr_debug("ctcmpc: %s(): grpmaxbuf:%d xid2buflen:%d\n",
+ __FUNCTION__, grp->group_max_buflen,
+ xid->xid2_buf_len);
+
+ if (grp->group_max_buflen == 0 ||
+ grp->group_max_buflen > xid->xid2_buf_len - len)
+ grp->group_max_buflen = xid->xid2_buf_len - len;
+ }
+
+
+ if (grp->saved_xid2 == NULL) {
+ grp->saved_xid2 =
+ (struct xid2 *)skb_tail_pointer(grp->rcvd_xid_skb);
+
+ memcpy(skb_put(grp->rcvd_xid_skb,
+ XID2_LENGTH), xid, XID2_LENGTH);
+ grp->rcvd_xid_skb->data = grp->rcvd_xid_data;
+
+ skb_reset_tail_pointer(grp->rcvd_xid_skb);
+ grp->rcvd_xid_skb->len = 0;
+
+ /* convert two 32 bit numbers into 1 64 bit for id compare */
+ our_id = (__u64)priv->xid->xid2_adj_id;
+ our_id = our_id << 32;
+ our_id = our_id + priv->xid->xid2_sender_id;
+ their_id = (__u64)xid->xid2_adj_id;
+ their_id = their_id << 32;
+ their_id = their_id + xid->xid2_sender_id;
+ /* lower id assume the xside role */
+ if (our_id < their_id) {
+ grp->roll = XSIDE;
+ ctcm_pr_debug("ctcmpc :%s() WE HAVE LOW ID-"
+ "TAKE XSIDE\n", __FUNCTION__);
+ } else {
+ grp->roll = YSIDE;
+ ctcm_pr_debug("ctcmpc :%s() WE HAVE HIGH ID-"
+ "TAKE YSIDE\n", __FUNCTION__);
+ }
+
+ } else {
+ if (xid->xid2_flag4 != grp->saved_xid2->xid2_flag4) {
+ failed = 1;
+ printk(KERN_INFO "%s XID REJECTED - XID Flag Byte4\n",
+ __FUNCTION__);
+ }
+ if (xid->xid2_flag2 == 0x40) {
+ failed = 1;
+ printk(KERN_INFO "%s XID REJECTED - XID NOGOOD\n",
+ __FUNCTION__);
+ }
+ if (xid->xid2_adj_id != grp->saved_xid2->xid2_adj_id) {
+ failed = 1;
+ printk(KERN_INFO "%s XID REJECTED - "
+ "Adjacent Station ID Mismatch\n",
+ __FUNCTION__);
+ }
+ if (xid->xid2_sender_id != grp->saved_xid2->xid2_sender_id) {
+ failed = 1;
+ printk(KERN_INFO "%s XID REJECTED - "
+ "Sender Address Mismatch\n", __FUNCTION__);
+
+ }
+ }
+
+ if (failed) {
+ ctcm_pr_info("ctcmpc : %s() failed\n", __FUNCTION__);
+ priv->xid->xid2_flag2 = 0x40;
+ grp->saved_xid2->xid2_flag2 = 0x40;
+ rc = 1;
+ }
+
+done:
+
+ ctcm_pr_debug("ctcmpc exit: %s()\n", __FUNCTION__);
+ return rc;
+}
+
+/*
+ * MPC Group Station FSM action
+ * CTCM_PROTO_MPC only
+ */
+static void mpc_action_side_xid(fsm_instance *fsm, void *arg, int side)
+{
+ struct channel *ch = arg;
+ struct ctcm_priv *priv;
+ struct mpc_group *grp = NULL;
+ struct net_device *dev = NULL;
+ int rc = 0;
+ int gotlock = 0;
+ unsigned long saveflags = 0; /* avoids compiler warning with
+ spin_unlock_irqrestore */
+
+ if (ch == NULL) {
+ printk(KERN_INFO "%s ch=NULL\n", __FUNCTION__);
+ goto done;
+ }
+
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n",
+ __FUNCTION__, smp_processor_id(), ch, ch->id);
+
+ dev = ch->netdev;
+ if (dev == NULL) {
+ printk(KERN_INFO "%s dev=NULL\n", __FUNCTION__);
+ goto done;
+ }
+
+ priv = dev->priv;
+ if (priv == NULL) {
+ printk(KERN_INFO "%s priv=NULL\n", __FUNCTION__);
+ goto done;
+ }
+
+ grp = priv->mpcg;
+ if (grp == NULL) {
+ printk(KERN_INFO "%s grp=NULL\n", __FUNCTION__);
+ goto done;
+ }
+
+ if (ctcm_checkalloc_buffer(ch))
+ goto done;
+
+ /* skb data-buffer referencing: */
+
+ ch->trans_skb->data = ch->trans_skb_data;
+ skb_reset_tail_pointer(ch->trans_skb);
+ ch->trans_skb->len = 0;
+ /* result of the previous 3 statements is NOT always
+ * already set after ctcm_checkalloc_buffer
+ * because of possible reuse of the trans_skb
+ */
+ memset(ch->trans_skb->data, 0, 16);
+ ch->rcvd_xid_th = (struct th_header *)ch->trans_skb_data;
+ /* check is main purpose here: */
+ skb_put(ch->trans_skb, TH_HEADER_LENGTH);
+ ch->rcvd_xid = (struct xid2 *)skb_tail_pointer(ch->trans_skb);
+ /* check is main purpose here: */
+ skb_put(ch->trans_skb, XID2_LENGTH);
+ ch->rcvd_xid_id = skb_tail_pointer(ch->trans_skb);
+ /* cleanup back to startpoint */
+ ch->trans_skb->data = ch->trans_skb_data;
+ skb_reset_tail_pointer(ch->trans_skb);
+ ch->trans_skb->len = 0;
+
+ /* non-checking rewrite of above skb data-buffer referencing: */
+ /*
+ memset(ch->trans_skb->data, 0, 16);
+ ch->rcvd_xid_th = (struct th_header *)ch->trans_skb_data;
+ ch->rcvd_xid = (struct xid2 *)(ch->trans_skb_data + TH_HEADER_LENGTH);
+ ch->rcvd_xid_id = ch->trans_skb_data + TH_HEADER_LENGTH + XID2_LENGTH;
+ */
+
+ ch->ccw[8].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ ch->ccw[8].count = 0;
+ ch->ccw[8].cda = 0x00;
+
+ if (side == XSIDE) {
+ /* mpc_action_xside_xid */
+ if (ch->xid_th == NULL) {
+ printk(KERN_INFO "%s ch->xid_th=NULL\n", __FUNCTION__);
+ goto done;
+ }
+ ch->ccw[9].cmd_code = CCW_CMD_WRITE;
+ ch->ccw[9].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ ch->ccw[9].count = TH_HEADER_LENGTH;
+ ch->ccw[9].cda = virt_to_phys(ch->xid_th);
+
+ if (ch->xid == NULL) {
+ printk(KERN_INFO "%s ch->xid=NULL\n", __FUNCTION__);
+ goto done;
+ }
+
+ ch->ccw[10].cmd_code = CCW_CMD_WRITE;
+ ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ ch->ccw[10].count = XID2_LENGTH;
+ ch->ccw[10].cda = virt_to_phys(ch->xid);
+
+ ch->ccw[11].cmd_code = CCW_CMD_READ;
+ ch->ccw[11].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ ch->ccw[11].count = TH_HEADER_LENGTH;
+ ch->ccw[11].cda = virt_to_phys(ch->rcvd_xid_th);
+
+ ch->ccw[12].cmd_code = CCW_CMD_READ;
+ ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ ch->ccw[12].count = XID2_LENGTH;
+ ch->ccw[12].cda = virt_to_phys(ch->rcvd_xid);
+
+ ch->ccw[13].cmd_code = CCW_CMD_READ;
+ ch->ccw[13].cda = virt_to_phys(ch->rcvd_xid_id);
+
+ } else { /* side == YSIDE : mpc_action_yside_xid */
+ ch->ccw[9].cmd_code = CCW_CMD_READ;
+ ch->ccw[9].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ ch->ccw[9].count = TH_HEADER_LENGTH;
+ ch->ccw[9].cda = virt_to_phys(ch->rcvd_xid_th);
+
+ ch->ccw[10].cmd_code = CCW_CMD_READ;
+ ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ ch->ccw[10].count = XID2_LENGTH;
+ ch->ccw[10].cda = virt_to_phys(ch->rcvd_xid);
+
+ if (ch->xid_th == NULL) {
+ printk(KERN_INFO "%s ch->xid_th=NULL\n", __FUNCTION__);
+ goto done;
+ }
+ ch->ccw[11].cmd_code = CCW_CMD_WRITE;
+ ch->ccw[11].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ ch->ccw[11].count = TH_HEADER_LENGTH;
+ ch->ccw[11].cda = virt_to_phys(ch->xid_th);
+
+ if (ch->xid == NULL) {
+ printk(KERN_INFO "%s ch->xid=NULL\n", __FUNCTION__);
+ goto done;
+ }
+ ch->ccw[12].cmd_code = CCW_CMD_WRITE;
+ ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ ch->ccw[12].count = XID2_LENGTH;
+ ch->ccw[12].cda = virt_to_phys(ch->xid);
+
+ if (ch->xid_id == NULL) {
+ printk(KERN_INFO "%s ch->xid_id=NULL\n", __FUNCTION__);
+ goto done;
+ }
+ ch->ccw[13].cmd_code = CCW_CMD_WRITE;
+ ch->ccw[13].cda = virt_to_phys(ch->xid_id);
+
+ }
+ ch->ccw[13].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ ch->ccw[13].count = 4;
+
+ ch->ccw[14].cmd_code = CCW_CMD_NOOP;
+ ch->ccw[14].flags = CCW_FLAG_SLI;
+ ch->ccw[14].count = 0;
+ ch->ccw[14].cda = 0;
+
+ if (do_debug_ccw)
+ ctcmpc_dumpit((char *)&ch->ccw[8], sizeof(struct ccw1) * 7);
+
+ ctcmpc_dumpit((char *)ch->xid_th, TH_HEADER_LENGTH);
+ ctcmpc_dumpit((char *)ch->xid, XID2_LENGTH);
+ ctcmpc_dumpit((char *)ch->xid_id, 4);
+ if (!in_irq()) {
+ /* Such conditional locking is a known problem for
+ * sparse because its static undeterministic.
+ * Warnings should be ignored here. */
+ spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
+ gotlock = 1;
+ }
+
+ fsm_addtimer(&ch->timer, 5000 , CTC_EVENT_TIMER, ch);
+ rc = ccw_device_start(ch->cdev, &ch->ccw[8],
+ (unsigned long)ch, 0xff, 0);
+
+ if (gotlock) /* see remark above about conditional locking */
+ spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
+
+ if (rc != 0) {
+ ctcm_pr_info("ctcmpc: %s() ch:%s IO failed \n",
+ __FUNCTION__, ch->id);
+ ctcm_ccw_check_rc(ch, rc,
+ (side == XSIDE) ? "x-side XID" : "y-side XID");
+ }
+
+done:
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc exit : %s(): ch=0x%p id=%s\n",
+ __FUNCTION__, ch, ch->id);
+ return;
+
+}
+
+/*
+ * MPC Group Station FSM action
+ * CTCM_PROTO_MPC only
+ */
+static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg)
+{
+ mpc_action_side_xid(fsm, arg, XSIDE);
+}
+
+/*
+ * MPC Group Station FSM action
+ * CTCM_PROTO_MPC only
+ */
+static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg)
+{
+ mpc_action_side_xid(fsm, arg, YSIDE);
+}
+
+/*
+ * MPC Group Station FSM action
+ * CTCM_PROTO_MPC only
+ */
+static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg)
+{
+ struct channel *ch = arg;
+ struct ctcm_priv *priv;
+ struct mpc_group *grp = NULL;
+ struct net_device *dev = NULL;
+
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n",
+ __FUNCTION__, smp_processor_id(), ch, ch->id);
+
+ if (ch == NULL) {
+ printk(KERN_WARNING "%s ch=NULL\n", __FUNCTION__);
+ goto done;
+ }
+
+ dev = ch->netdev;
+ if (dev == NULL) {
+ printk(KERN_WARNING "%s dev=NULL\n", __FUNCTION__);
+ goto done;
+ }
+
+ priv = dev->priv;
+ if (priv == NULL) {
+ printk(KERN_WARNING "%s priv=NULL\n", __FUNCTION__);
+ goto done;
+ }
+
+ grp = priv->mpcg;
+ if (grp == NULL) {
+ printk(KERN_WARNING "%s grp=NULL\n", __FUNCTION__);
+ goto done;
+ }
+
+ if (ch->xid == NULL) {
+ printk(KERN_WARNING "%s ch-xid=NULL\n", __FUNCTION__);
+ goto done;
+ }
+
+ fsm_newstate(ch->fsm, CH_XID0_INPROGRESS);
+
+ ch->xid->xid2_option = XID2_0;
+
+ switch (fsm_getstate(grp->fsm)) {
+ case MPCG_STATE_XID2INITW:
+ case MPCG_STATE_XID2INITX:
+ ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD;
+ break;
+ case MPCG_STATE_XID0IOWAIT:
+ case MPCG_STATE_XID0IOWAIX:
+ ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL;
+ break;
+ }
+
+ fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch);
+
+done:
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc exit : %s(): ch=0x%p id=%s\n",
+ __FUNCTION__, ch, ch->id);
+ return;
+
+}
+
+/*
+ * MPC Group Station FSM action
+ * CTCM_PROTO_MPC only
+*/
+static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg)
+{
+ struct net_device *dev = arg;
+ struct ctcm_priv *priv = NULL;
+ struct mpc_group *grp = NULL;
+ int direction;
+ int rc = 0;
+ int send = 0;
+
+ ctcm_pr_debug("ctcmpc enter: %s() \n", __FUNCTION__);
+
+ if (dev == NULL) {
+ printk(KERN_INFO "%s dev=NULL \n", __FUNCTION__);
+ rc = 1;
+ goto done;
+ }
+
+ priv = dev->priv;
+ if (priv == NULL) {
+ printk(KERN_INFO "%s priv=NULL \n", __FUNCTION__);
+ rc = 1;
+ goto done;
+ }
+
+ grp = priv->mpcg;
+ if (grp == NULL) {
+ printk(KERN_INFO "%s grp=NULL \n", __FUNCTION__);
+ rc = 1;
+ goto done;
+ }
+
+ for (direction = READ; direction <= WRITE; direction++) {
+ struct channel *ch = priv->channel[direction];
+ struct xid2 *thisxid = ch->xid;
+ ch->xid_skb->data = ch->xid_skb_data;
+ skb_reset_tail_pointer(ch->xid_skb);
+ ch->xid_skb->len = 0;
+ thisxid->xid2_option = XID2_7;
+ send = 0;
+
+ /* xid7 phase 1 */
+ if (grp->outstanding_xid7_p2 > 0) {
+ if (grp->roll == YSIDE) {
+ if (fsm_getstate(ch->fsm) == CH_XID7_PENDING1) {
+ fsm_newstate(ch->fsm, CH_XID7_PENDING2);
+ ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD;
+ memcpy(skb_put(ch->xid_skb,
+ TH_HEADER_LENGTH),
+ &thdummy, TH_HEADER_LENGTH);
+ send = 1;
+ }
+ } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING2) {
+ fsm_newstate(ch->fsm, CH_XID7_PENDING2);
+ ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL;
+ memcpy(skb_put(ch->xid_skb,
+ TH_HEADER_LENGTH),
+ &thnorm, TH_HEADER_LENGTH);
+ send = 1;
+ }
+ } else {
+ /* xid7 phase 2 */
+ if (grp->roll == YSIDE) {
+ if (fsm_getstate(ch->fsm) < CH_XID7_PENDING4) {
+ fsm_newstate(ch->fsm, CH_XID7_PENDING4);
+ memcpy(skb_put(ch->xid_skb,
+ TH_HEADER_LENGTH),
+ &thnorm, TH_HEADER_LENGTH);
+ ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL;
+ send = 1;
+ }
+ } else if (fsm_getstate(ch->fsm) == CH_XID7_PENDING3) {
+ fsm_newstate(ch->fsm, CH_XID7_PENDING4);
+ ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD;
+ memcpy(skb_put(ch->xid_skb, TH_HEADER_LENGTH),
+ &thdummy, TH_HEADER_LENGTH);
+ send = 1;
+ }
+ }
+
+ if (send)
+ fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch);
+ }
+
+done:
+
+ if (rc != 0)
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+
+ return;
+}
+
+/*
+ * MPC Group Station FSM action
+ * CTCM_PROTO_MPC only
+ */
+static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg)
+{
+
+ struct mpcg_info *mpcginfo = arg;
+ struct channel *ch = mpcginfo->ch;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv;
+ struct mpc_group *grp;
+
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n",
+ __FUNCTION__, smp_processor_id(), ch, ch->id);
+
+ priv = dev->priv;
+ grp = priv->mpcg;
+
+ ctcm_pr_debug("ctcmpc in:%s() %s xid2:%i xid7:%i xidt_p2:%i \n",
+ __FUNCTION__, ch->id,
+ grp->outstanding_xid2,
+ grp->outstanding_xid7,
+ grp->outstanding_xid7_p2);
+
+ if (fsm_getstate(ch->fsm) < CH_XID7_PENDING)
+ fsm_newstate(ch->fsm, CH_XID7_PENDING);
+
+ grp->outstanding_xid2--;
+ grp->outstanding_xid7++;
+ grp->outstanding_xid7_p2++;
+
+ /* must change state before validating xid to */
+ /* properly handle interim interrupts received*/
+ switch (fsm_getstate(grp->fsm)) {
+ case MPCG_STATE_XID2INITW:
+ fsm_newstate(grp->fsm, MPCG_STATE_XID2INITX);
+ mpc_validate_xid(mpcginfo);
+ break;
+ case MPCG_STATE_XID0IOWAIT:
+ fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIX);
+ mpc_validate_xid(mpcginfo);
+ break;
+ case MPCG_STATE_XID2INITX:
+ if (grp->outstanding_xid2 == 0) {
+ fsm_newstate(grp->fsm, MPCG_STATE_XID7INITW);
+ mpc_validate_xid(mpcginfo);
+ fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev);
+ }
+ break;
+ case MPCG_STATE_XID0IOWAIX:
+ if (grp->outstanding_xid2 == 0) {
+ fsm_newstate(grp->fsm, MPCG_STATE_XID7INITI);
+ mpc_validate_xid(mpcginfo);
+ fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev);
+ }
+ break;
+ }
+ kfree(mpcginfo);
+
+ if (do_debug) {
+ ctcm_pr_debug("ctcmpc:%s() %s xid2:%i xid7:%i xidt_p2:%i \n",
+ __FUNCTION__, ch->id,
+ grp->outstanding_xid2,
+ grp->outstanding_xid7,
+ grp->outstanding_xid7_p2);
+ ctcm_pr_debug("ctcmpc:%s() %s grpstate: %s chanstate: %s \n",
+ __FUNCTION__, ch->id,
+ fsm_getstate_str(grp->fsm),
+ fsm_getstate_str(ch->fsm));
+ }
+ return;
+
+}
+
+
+/*
+ * MPC Group Station FSM action
+ * CTCM_PROTO_MPC only
+ */
+static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg)
+{
+ struct mpcg_info *mpcginfo = arg;
+ struct channel *ch = mpcginfo->ch;
+ struct net_device *dev = ch->netdev;
+ struct ctcm_priv *priv = dev->priv;
+ struct mpc_group *grp = priv->mpcg;
+
+ if (do_debug) {
+ ctcm_pr_debug("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n",
+ __FUNCTION__, smp_processor_id(), ch, ch->id);
+
+ ctcm_pr_debug("ctcmpc: outstanding_xid7: %i, "
+ " outstanding_xid7_p2: %i\n",
+ grp->outstanding_xid7,
+ grp->outstanding_xid7_p2);
+ }
+
+ grp->outstanding_xid7--;
+ ch->xid_skb->data = ch->xid_skb_data;
+ skb_reset_tail_pointer(ch->xid_skb);
+ ch->xid_skb->len = 0;
+
+ switch (fsm_getstate(grp->fsm)) {
+ case MPCG_STATE_XID7INITI:
+ fsm_newstate(grp->fsm, MPCG_STATE_XID7INITZ);
+ mpc_validate_xid(mpcginfo);
+ break;
+ case MPCG_STATE_XID7INITW:
+ fsm_newstate(grp->fsm, MPCG_STATE_XID7INITX);
+ mpc_validate_xid(mpcginfo);
+ break;
+ case MPCG_STATE_XID7INITZ:
+ case MPCG_STATE_XID7INITX:
+ if (grp->outstanding_xid7 == 0) {
+ if (grp->outstanding_xid7_p2 > 0) {
+ grp->outstanding_xid7 =
+ grp->outstanding_xid7_p2;
+ grp->outstanding_xid7_p2 = 0;
+ } else
+ fsm_newstate(grp->fsm, MPCG_STATE_XID7INITF);
+
+ mpc_validate_xid(mpcginfo);
+ fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev);
+ break;
+ }
+ mpc_validate_xid(mpcginfo);
+ break;
+ }
+
+ kfree(mpcginfo);
+
+ if (do_debug)
+ ctcm_pr_debug("ctcmpc exit: %s(): cp=%i ch=0x%p id=%s\n",
+ __FUNCTION__, smp_processor_id(), ch, ch->id);
+ return;
+
+}
+
+/*
+ * mpc_action helper of an MPC Group Station FSM action
+ * CTCM_PROTO_MPC only
+ */
+static int mpc_send_qllc_discontact(struct net_device *dev)
+{
+ int rc = 0;
+ __u32 new_len = 0;
+ struct sk_buff *skb;
+ struct qllc *qllcptr;
+ struct ctcm_priv *priv;
+ struct mpc_group *grp;
+
+ ctcm_pr_debug("ctcmpc enter: %s()\n", __FUNCTION__);
+
+ if (dev == NULL) {
+ printk(KERN_INFO "%s() dev=NULL\n", __FUNCTION__);
+ rc = 1;
+ goto done;
+ }
+
+ priv = dev->priv;
+ if (priv == NULL) {
+ printk(KERN_INFO "%s() priv=NULL\n", __FUNCTION__);
+ rc = 1;
+ goto done;
+ }
+
+ grp = priv->mpcg;
+ if (grp == NULL) {
+ printk(KERN_INFO "%s() grp=NULL\n", __FUNCTION__);
+ rc = 1;
+ goto done;
+ }
+ ctcm_pr_info("ctcmpc: %s() GROUP STATE: %s\n", __FUNCTION__,
+ mpcg_state_names[grp->saved_state]);
+
+ switch (grp->saved_state) {
+ /*
+ * establish conn callback function is
+ * preferred method to report failure
+ */
+ case MPCG_STATE_XID0IOWAIT:
+ case MPCG_STATE_XID0IOWAIX:
+ case MPCG_STATE_XID7INITI:
+ case MPCG_STATE_XID7INITZ:
+ case MPCG_STATE_XID2INITW:
+ case MPCG_STATE_XID2INITX:
+ case MPCG_STATE_XID7INITW:
+ case MPCG_STATE_XID7INITX:
+ if (grp->estconnfunc) {
+ grp->estconnfunc(grp->port_num, -1, 0);
+ grp->estconnfunc = NULL;
+ break;
+ }
+ case MPCG_STATE_FLOWC:
+ case MPCG_STATE_READY:
+ grp->send_qllc_disc = 2;
+ new_len = sizeof(struct qllc);
+ qllcptr = kzalloc(new_len, gfp_type() | GFP_DMA);
+ if (qllcptr == NULL) {
+ printk(KERN_INFO
+ "ctcmpc: Out of memory in %s()\n",
+ dev->name);
+ rc = 1;
+ goto done;
+ }
+
+ qllcptr->qllc_address = 0xcc;
+ qllcptr->qllc_commands = 0x03;
+
+ skb = __dev_alloc_skb(new_len, GFP_ATOMIC);
+
+ if (skb == NULL) {
+ printk(KERN_INFO "%s Out of memory in mpc_send_qllc\n",
+ dev->name);
+ priv->stats.rx_dropped++;
+ rc = 1;
+ kfree(qllcptr);
+ goto done;
+ }
+
+ memcpy(skb_put(skb, new_len), qllcptr, new_len);
+ kfree(qllcptr);
+
+ if (skb_headroom(skb) < 4) {
+ printk(KERN_INFO "ctcmpc: %s() Unable to"
+ " build discontact for %s\n",
+ __FUNCTION__, dev->name);
+ rc = 1;
+ dev_kfree_skb_any(skb);
+ goto done;
+ }
+
+ *((__u32 *)skb_push(skb, 4)) = priv->channel[READ]->pdu_seq;
+ priv->channel[READ]->pdu_seq++;
+ if (do_debug_data)
+ ctcm_pr_debug("ctcmpc: %s ToDCM_pdu_seq= %08x\n",
+ __FUNCTION__, priv->channel[READ]->pdu_seq);
+
+ /* receipt of CC03 resets anticipated sequence number on
+ receiving side */
+ priv->channel[READ]->pdu_seq = 0x00;
+ skb_reset_mac_header(skb);
+ skb->dev = dev;
+ skb->protocol = htons(ETH_P_SNAP);
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+ ctcmpc_dumpit((char *)skb->data, (sizeof(struct qllc) + 4));
+
+ netif_rx(skb);
+ break;
+ default:
+ break;
+
+ }
+
+done:
+ ctcm_pr_debug("ctcmpc exit: %s()\n", __FUNCTION__);
+ return rc;
+}
+/* --- This is the END my friend --- */
+
diff --git a/drivers/s390/net/ctcm_mpc.h b/drivers/s390/net/ctcm_mpc.h
new file mode 100644
index 0000000..f996860
--- /dev/null
+++ b/drivers/s390/net/ctcm_mpc.h
@@ -0,0 +1,239 @@
+/*
+ * drivers/s390/net/ctcm_mpc.h
+ *
+ * Copyright IBM Corp. 2007
+ * Authors: Peter Tiedemann (ptiedem@de.ibm.com)
+ *
+ * MPC additions:
+ * Belinda Thompson (belindat@us.ibm.com)
+ * Andy Richter (richtera@us.ibm.com)
+ */
+
+#ifndef _CTC_MPC_H_
+#define _CTC_MPC_H_
+
+#include <linux/skbuff.h>
+#include "fsm.h"
+
+/*
+ * MPC external interface
+ * Note that ctc_mpc_xyz are called with a lock on ................
+ */
+
+/* port_number is the mpc device 0, 1, 2 etc mpc2 is port_number 2 */
+
+/* passive open Just wait for XID2 exchange */
+extern int ctc_mpc_alloc_channel(int port,
+ void (*callback)(int port_num, int max_write_size));
+/* active open Alloc then send XID2 */
+extern void ctc_mpc_establish_connectivity(int port,
+ void (*callback)(int port_num, int rc, int max_write_size));
+
+extern void ctc_mpc_dealloc_ch(int port);
+extern void ctc_mpc_flow_control(int port, int flowc);
+
+/*
+ * other MPC Group prototypes and structures
+ */
+
+#define ETH_P_SNA_DIX 0x80D5
+
+/*
+ * Declaration of an XID2
+ *
+ */
+#define ALLZEROS 0x0000000000000000
+
+#define XID_FM2 0x20
+#define XID2_0 0x00
+#define XID2_7 0x07
+#define XID2_WRITE_SIDE 0x04
+#define XID2_READ_SIDE 0x05
+
+struct xid2 {
+ __u8 xid2_type_id;
+ __u8 xid2_len;
+ __u32 xid2_adj_id;
+ __u8 xid2_rlen;
+ __u8 xid2_resv1;
+ __u8 xid2_flag1;
+ __u8 xid2_fmtt;
+ __u8 xid2_flag4;
+ __u16 xid2_resv2;
+ __u8 xid2_tgnum;
+ __u32 xid2_sender_id;
+ __u8 xid2_flag2;
+ __u8 xid2_option;
+ char xid2_resv3[8];
+ __u16 xid2_resv4;
+ __u8 xid2_dlc_type;
+ __u16 xid2_resv5;
+ __u8 xid2_mpc_flag;
+ __u8 xid2_resv6;
+ __u16 xid2_buf_len;
+ char xid2_buffer[255 - (13 * sizeof(__u8) +
+ 2 * sizeof(__u32) +
+ 4 * sizeof(__u16) +
+ 8 * sizeof(char))];
+} __attribute__ ((packed));
+
+#define XID2_LENGTH (sizeof(struct xid2))
+
+struct th_header {
+ __u8 th_seg;
+ __u8 th_ch_flag;
+#define TH_HAS_PDU 0xf0
+#define TH_IS_XID 0x01
+#define TH_SWEEP_REQ 0xfe
+#define TH_SWEEP_RESP 0xff
+ __u8 th_blk_flag;
+#define TH_DATA_IS_XID 0x80
+#define TH_RETRY 0x40
+#define TH_DISCONTACT 0xc0
+#define TH_SEG_BLK 0x20
+#define TH_LAST_SEG 0x10
+#define TH_PDU_PART 0x08
+ __u8 th_is_xid; /* is 0x01 if this is XID */
+ __u32 th_seq_num;
+} __attribute__ ((packed));
+
+struct th_addon {
+ __u32 th_last_seq;
+ __u32 th_resvd;
+} __attribute__ ((packed));
+
+struct th_sweep {
+ struct th_header th;
+ struct th_addon sw;
+} __attribute__ ((packed));
+
+#define TH_HEADER_LENGTH (sizeof(struct th_header))
+#define TH_SWEEP_LENGTH (sizeof(struct th_sweep))
+
+#define PDU_LAST 0x80
+#define PDU_CNTL 0x40
+#define PDU_FIRST 0x20
+
+struct pdu {
+ __u32 pdu_offset;
+ __u8 pdu_flag;
+ __u8 pdu_proto; /* 0x01 is APPN SNA */
+ __u16 pdu_seq;
+} __attribute__ ((packed));
+
+#define PDU_HEADER_LENGTH (sizeof(struct pdu))
+
+struct qllc {
+ __u8 qllc_address;
+#define QLLC_REQ 0xFF
+#define QLLC_RESP 0x00
+ __u8 qllc_commands;
+#define QLLC_DISCONNECT 0x53
+#define QLLC_UNSEQACK 0x73
+#define QLLC_SETMODE 0x93
+#define QLLC_EXCHID 0xBF
+} __attribute__ ((packed));
+
+
+/*
+ * Definition of one MPC group
+ */
+
+#define MAX_MPCGCHAN 10
+#define MPC_XID_TIMEOUT_VALUE 10000
+#define MPC_CHANNEL_ADD 0
+#define MPC_CHANNEL_REMOVE 1
+#define MPC_CHANNEL_ATTN 2
+#define XSIDE 1
+#define YSIDE 0
+
+struct mpcg_info {
+ struct sk_buff *skb;
+ struct channel *ch;
+ struct xid2 *xid;
+ struct th_sweep *sweep;
+ struct th_header *th;
+};
+
+struct mpc_group {
+ struct tasklet_struct mpc_tasklet;
+ struct tasklet_struct mpc_tasklet2;
+ int changed_side;
+ int saved_state;
+ int channels_terminating;
+ int out_of_sequence;
+ int flow_off_called;
+ int port_num;
+ int port_persist;
+ int alloc_called;
+ __u32 xid2_adj_id;
+ __u8 xid2_tgnum;
+ __u32 xid2_sender_id;
+ int num_channel_paths;
+ int active_channels[2];
+ __u16 group_max_buflen;
+ int outstanding_xid2;
+ int outstanding_xid7;
+ int outstanding_xid7_p2;
+ int sweep_req_pend_num;
+ int sweep_rsp_pend_num;
+ struct sk_buff *xid_skb;
+ char *xid_skb_data;
+ struct th_header *xid_th;
+ struct xid2 *xid;
+ char *xid_id;
+ struct th_header *rcvd_xid_th;
+ struct sk_buff *rcvd_xid_skb;
+ char *rcvd_xid_data;
+ __u8 in_sweep;
+ __u8 roll;
+ struct xid2 *saved_xid2;
+ void (*allochanfunc)(int, int);
+ int allocchan_callback_retries;
+ void (*estconnfunc)(int, int, int);
+ int estconn_callback_retries;
+ int estconn_called;
+ int xidnogood;
+ int send_qllc_disc;
+ fsm_timer timer;
+ fsm_instance *fsm; /* group xid fsm */
+};
+
+#ifdef DEBUGDATA
+void ctcmpc_dumpit(char *buf, int len);
+#else
+static inline void ctcmpc_dumpit(char *buf, int len)
+{
+}
+#endif
+
+#ifdef DEBUGDATA
+/*
+ * Dump header and first 16 bytes of an sk_buff for debugging purposes.
+ *
+ * skb The struct sk_buff to dump.
+ * offset Offset relative to skb-data, where to start the dump.
+ */
+void ctcmpc_dump_skb(struct sk_buff *skb, int offset);
+#else
+static inline void ctcmpc_dump_skb(struct sk_buff *skb, int offset)
+{}
+#endif
+
+static inline void ctcmpc_dump32(char *buf, int len)
+{
+ if (len < 32)
+ ctcmpc_dumpit(buf, len);
+ else
+ ctcmpc_dumpit(buf, 32);
+}
+
+int ctcmpc_open(struct net_device *);
+void ctcm_ccw_check_rc(struct channel *, int, char *);
+void mpc_group_ready(unsigned long adev);
+int mpc_channel_action(struct channel *ch, int direction, int action);
+void mpc_action_send_discontact(unsigned long thischan);
+void mpc_action_discontact(fsm_instance *fi, int event, void *arg);
+void ctcmpc_bh(unsigned long thischan);
+#endif
+/* --- This is the END my friend --- */
diff --git a/drivers/s390/net/ctcm_sysfs.c b/drivers/s390/net/ctcm_sysfs.c
new file mode 100644
index 0000000..bb2d137
--- /dev/null
+++ b/drivers/s390/net/ctcm_sysfs.c
@@ -0,0 +1,210 @@
+/*
+ * drivers/s390/net/ctcm_sysfs.c
+ *
+ * Copyright IBM Corp. 2007, 2007
+ * Authors: Peter Tiedemann (ptiedem@de.ibm.com)
+ *
+ */
+
+#undef DEBUG
+#undef DEBUGDATA
+#undef DEBUGCCW
+
+#include <linux/sysfs.h>
+#include "ctcm_main.h"
+
+/*
+ * sysfs attributes
+ */
+
+static ssize_t ctcm_buffer_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ctcm_priv *priv = dev_get_drvdata(dev);
+
+ if (!priv)
+ return -ENODEV;
+ return sprintf(buf, "%d\n", priv->buffer_size);
+}
+
+static ssize_t ctcm_buffer_write(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct net_device *ndev;
+ int bs1;
+ struct ctcm_priv *priv = dev_get_drvdata(dev);
+
+ if (!(priv && priv->channel[READ] &&
+ (ndev = priv->channel[READ]->netdev))) {
+ CTCM_DBF_TEXT(SETUP, CTC_DBF_ERROR, "bfnondev");
+ return -ENODEV;
+ }
+
+ sscanf(buf, "%u", &bs1);
+ if (bs1 > CTCM_BUFSIZE_LIMIT)
+ goto einval;
+ if (bs1 < (576 + LL_HEADER_LENGTH + 2))
+ goto einval;
+ priv->buffer_size = bs1; /* just to overwrite the default */
+
+ if ((ndev->flags & IFF_RUNNING) &&
+ (bs1 < (ndev->mtu + LL_HEADER_LENGTH + 2)))
+ goto einval;
+
+ priv->channel[READ]->max_bufsize = bs1;
+ priv->channel[WRITE]->max_bufsize = bs1;
+ if (!(ndev->flags & IFF_RUNNING))
+ ndev->mtu = bs1 - LL_HEADER_LENGTH - 2;
+ priv->channel[READ]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
+ priv->channel[WRITE]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
+
+ CTCM_DBF_DEV(SETUP, ndev, buf);
+ return count;
+
+einval:
+ CTCM_DBF_DEV(SETUP, ndev, "buff_err");
+ return -EINVAL;
+}
+
+static void ctcm_print_statistics(struct ctcm_priv *priv)
+{
+ char *sbuf;
+ char *p;
+
+ if (!priv)
+ return;
+ sbuf = kmalloc(2048, GFP_KERNEL);
+ if (sbuf == NULL)
+ return;
+ p = sbuf;
+
+ p += sprintf(p, " Device FSM state: %s\n",
+ fsm_getstate_str(priv->fsm));
+ p += sprintf(p, " RX channel FSM state: %s\n",
+ fsm_getstate_str(priv->channel[READ]->fsm));
+ p += sprintf(p, " TX channel FSM state: %s\n",
+ fsm_getstate_str(priv->channel[WRITE]->fsm));
+ p += sprintf(p, " Max. TX buffer used: %ld\n",
+ priv->channel[WRITE]->prof.maxmulti);
+ p += sprintf(p, " Max. chained SKBs: %ld\n",
+ priv->channel[WRITE]->prof.maxcqueue);
+ p += sprintf(p, " TX single write ops: %ld\n",
+ priv->channel[WRITE]->prof.doios_single);
+ p += sprintf(p, " TX multi write ops: %ld\n",
+ priv->channel[WRITE]->prof.doios_multi);
+ p += sprintf(p, " Netto bytes written: %ld\n",
+ priv->channel[WRITE]->prof.txlen);
+ p += sprintf(p, " Max. TX IO-time: %ld\n",
+ priv->channel[WRITE]->prof.tx_time);
+
+ printk(KERN_INFO "Statistics for %s:\n%s",
+ priv->channel[WRITE]->netdev->name, sbuf);
+ kfree(sbuf);
+ return;
+}
+
+static ssize_t stats_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ctcm_priv *priv = dev_get_drvdata(dev);
+ if (!priv)
+ return -ENODEV;
+ ctcm_print_statistics(priv);
+ return sprintf(buf, "0\n");
+}
+
+static ssize_t stats_write(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ctcm_priv *priv = dev_get_drvdata(dev);
+ if (!priv)
+ return -ENODEV;
+ /* Reset statistics */
+ memset(&priv->channel[WRITE]->prof, 0,
+ sizeof(priv->channel[WRITE]->prof));
+ return count;
+}
+
+static ssize_t ctcm_proto_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ctcm_priv *priv = dev_get_drvdata(dev);
+ if (!priv)
+ return -ENODEV;
+
+ return sprintf(buf, "%d\n", priv->protocol);
+}
+
+static ssize_t ctcm_proto_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ int value;
+ struct ctcm_priv *priv = dev_get_drvdata(dev);
+
+ if (!priv)
+ return -ENODEV;
+ sscanf(buf, "%u", &value);
+ if (!((value == CTCM_PROTO_S390) ||
+ (value == CTCM_PROTO_LINUX) ||
+ (value == CTCM_PROTO_MPC) ||
+ (value == CTCM_PROTO_OS390)))
+ return -EINVAL;
+ priv->protocol = value;
+ CTCM_DBF_DEV(SETUP, dev, buf);
+
+ return count;
+}
+
+static ssize_t ctcm_type_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ccwgroup_device *cgdev;
+
+ cgdev = to_ccwgroupdev(dev);
+ if (!cgdev)
+ return -ENODEV;
+
+ return sprintf(buf, "%s\n",
+ cu3088_type[cgdev->cdev[0]->id.driver_info]);
+}
+
+static DEVICE_ATTR(buffer, 0644, ctcm_buffer_show, ctcm_buffer_write);
+static DEVICE_ATTR(protocol, 0644, ctcm_proto_show, ctcm_proto_store);
+static DEVICE_ATTR(type, 0444, ctcm_type_show, NULL);
+static DEVICE_ATTR(stats, 0644, stats_show, stats_write);
+
+static struct attribute *ctcm_attr[] = {
+ &dev_attr_protocol.attr,
+ &dev_attr_type.attr,
+ &dev_attr_buffer.attr,
+ NULL,
+};
+
+static struct attribute_group ctcm_attr_group = {
+ .attrs = ctcm_attr,
+};
+
+int ctcm_add_attributes(struct device *dev)
+{
+ int rc;
+
+ rc = device_create_file(dev, &dev_attr_stats);
+
+ return rc;
+}
+
+void ctcm_remove_attributes(struct device *dev)
+{
+ device_remove_file(dev, &dev_attr_stats);
+}
+
+int ctcm_add_files(struct device *dev)
+{
+ return sysfs_create_group(&dev->kobj, &ctcm_attr_group);
+}
+
+void ctcm_remove_files(struct device *dev)
+{
+ sysfs_remove_group(&dev->kobj, &ctcm_attr_group);
+}
+