Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 3468 insertions, 0 deletions

diff --git a/drivers/s390/cio/qdio.c b/drivers/s390/cio/qdio.c
new file mode 100644
index 00000000000..bbe9f45d143
--- /dev/null
+++ b/drivers/s390/cio/qdio.c
@@ -0,0 +1,3468 @@
+/*
+ *
+ * linux/drivers/s390/cio/qdio.c
+ *
+ * Linux for S/390 QDIO base support, Hipersocket base support
+ * version 2
+ *
+ * Copyright 2000,2002 IBM Corporation
+ * Author(s):             Utz Bacher <utz.bacher@de.ibm.com>
+ * 2.6 cio integration by Cornelia Huck <cohuck@de.ibm.com>
+ *
+ * Restriction: only 63 iqdio subchannels would have its own indicator,
+ * after that, subsequent subchannels share one indicator
+ *
+ *
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/proc_fs.h>
+#include <linux/timer.h>
+
+#include <asm/ccwdev.h>
+#include <asm/io.h>
+#include <asm/atomic.h>
+#include <asm/semaphore.h>
+#include <asm/timex.h>
+
+#include <asm/debug.h>
+#include <asm/qdio.h>
+
+#include "cio.h"
+#include "css.h"
+#include "device.h"
+#include "airq.h"
+#include "qdio.h"
+#include "ioasm.h"
+#include "chsc.h"
+
+#define VERSION_QDIO_C "$Revision: 1.98 $"
+
+/****************** MODULE PARAMETER VARIABLES ********************/
+MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
+MODULE_DESCRIPTION("QDIO base support version 2, " \
+		   "Copyright 2000 IBM Corporation");
+MODULE_LICENSE("GPL");
+
+/******************** HERE WE GO ***********************************/
+
+static const char version[] = "QDIO base support version 2 ("
+	VERSION_QDIO_C "/" VERSION_QDIO_H  "/" VERSION_CIO_QDIO_H ")";
+
+#ifdef QDIO_PERFORMANCE_STATS
+static int proc_perf_file_registration;
+static unsigned long i_p_c, i_p_nc, o_p_c, o_p_nc, ii_p_c, ii_p_nc;
+static struct qdio_perf_stats perf_stats;
+#endif /* QDIO_PERFORMANCE_STATS */
+
+static int hydra_thinints;
+static int omit_svs;
+
+static int indicator_used[INDICATORS_PER_CACHELINE];
+static __u32 * volatile indicators;
+static __u32 volatile spare_indicator;
+static atomic_t spare_indicator_usecount;
+
+static debug_info_t *qdio_dbf_setup;
+static debug_info_t *qdio_dbf_sbal;
+static debug_info_t *qdio_dbf_trace;
+static debug_info_t *qdio_dbf_sense;
+#ifdef CONFIG_QDIO_DEBUG
+static debug_info_t *qdio_dbf_slsb_out;
+static debug_info_t *qdio_dbf_slsb_in;
+#endif /* CONFIG_QDIO_DEBUG */
+
+/* iQDIO stuff: */
+static volatile struct qdio_q *tiq_list=NULL; /* volatile as it could change
+						 during a while loop */
+static DEFINE_SPINLOCK(ttiq_list_lock);
+static int register_thinint_result;
+static void tiqdio_tl(unsigned long);
+static DECLARE_TASKLET(tiqdio_tasklet,tiqdio_tl,0);
+
+/* not a macro, as one of the arguments is atomic_read */
+static inline int 
+qdio_min(int a,int b)
+{
+	if (a<b)
+		return a;
+	else
+		return b;
+}
+
+/***************** SCRUBBER HELPER ROUTINES **********************/
+
+static inline volatile __u64 
+qdio_get_micros(void)
+{
+        return (get_clock() >> 10); /* time>>12 is microseconds */
+}
+
+/* 
+ * unfortunately, we can't just xchg the values; in do_QDIO we want to reserve
+ * the q in any case, so that we'll not be interrupted when we are in
+ * qdio_mark_tiq... shouldn't have a really bad impact, as reserving almost
+ * ever works (last famous words) 
+ */
+static inline int 
+qdio_reserve_q(struct qdio_q *q)
+{
+	return atomic_add_return(1,&q->use_count) - 1;
+}
+
+static inline void 
+qdio_release_q(struct qdio_q *q)
+{
+	atomic_dec(&q->use_count);
+}
+
+static volatile inline void 
+qdio_set_slsb(volatile char *slsb, unsigned char value)
+{
+	xchg((char*)slsb,value);
+}
+
+static inline int 
+qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
+	       unsigned int gpr3)
+{
+	int cc;
+
+	QDIO_DBF_TEXT4(0,trace,"sigasync");
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+
+#ifdef QDIO_PERFORMANCE_STATS
+	perf_stats.siga_syncs++;
+#endif /* QDIO_PERFORMANCE_STATS */
+
+	cc = do_siga_sync(q->irq, gpr2, gpr3);
+	if (cc)
+		QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
+
+	return cc;
+}
+
+static inline int
+qdio_siga_sync_q(struct qdio_q *q)
+{
+	if (q->is_input_q)
+		return qdio_siga_sync(q, 0, q->mask);
+	return qdio_siga_sync(q, q->mask, 0);
+}
+
+/* 
+ * returns QDIO_SIGA_ERROR_ACCESS_EXCEPTION as cc, when SIGA returns
+ * an access exception 
+ */
+static inline int 
+qdio_siga_output(struct qdio_q *q)
+{
+	int cc;
+	__u32 busy_bit;
+	__u64 start_time=0;
+
+#ifdef QDIO_PERFORMANCE_STATS
+	perf_stats.siga_outs++;
+#endif /* QDIO_PERFORMANCE_STATS */
+
+	QDIO_DBF_TEXT4(0,trace,"sigaout");
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+
+	for (;;) {
+		cc = do_siga_output(q->irq, q->mask, &busy_bit);
+//QDIO_PRINT_ERR("cc=%x, busy=%x\n",cc,busy_bit);
+		if ((cc==2) && (busy_bit) && (q->is_iqdio_q)) {
+			if (!start_time) 
+				start_time=NOW;
+			if ((NOW-start_time)>QDIO_BUSY_BIT_PATIENCE)
+				break;
+		} else
+			break;
+	}
+	
+	if ((cc==2) && (busy_bit)) 
+		cc |= QDIO_SIGA_ERROR_B_BIT_SET;
+
+	if (cc)
+		QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
+
+	return cc;
+}
+
+static inline int 
+qdio_siga_input(struct qdio_q *q)
+{
+	int cc;
+
+	QDIO_DBF_TEXT4(0,trace,"sigain");
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+
+#ifdef QDIO_PERFORMANCE_STATS
+	perf_stats.siga_ins++;
+#endif /* QDIO_PERFORMANCE_STATS */
+
+	cc = do_siga_input(q->irq, q->mask);
+	
+	if (cc)
+		QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
+
+	return cc;
+}
+
+/* locked by the locks in qdio_activate and qdio_cleanup */
+static __u32 * volatile 
+qdio_get_indicator(void)
+{
+	int i;
+
+	for (i=1;i<INDICATORS_PER_CACHELINE;i++)
+		if (!indicator_used[i]) {
+			indicator_used[i]=1;
+			return indicators+i;
+		}
+	atomic_inc(&spare_indicator_usecount);
+	return (__u32 * volatile) &spare_indicator;
+}
+
+/* locked by the locks in qdio_activate and qdio_cleanup */
+static void 
+qdio_put_indicator(__u32 *addr)
+{
+	int i;
+
+	if ( (addr) && (addr!=&spare_indicator) ) {
+		i=addr-indicators;
+		indicator_used[i]=0;
+	}
+	if (addr == &spare_indicator)
+		atomic_dec(&spare_indicator_usecount);
+}
+
+static inline volatile void 
+tiqdio_clear_summary_bit(__u32 *location)
+{
+	QDIO_DBF_TEXT5(0,trace,"clrsummb");
+	QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
+
+	xchg(location,0);
+}
+
+static inline volatile void
+tiqdio_set_summary_bit(__u32 *location)
+{
+	QDIO_DBF_TEXT5(0,trace,"setsummb");
+	QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
+
+	xchg(location,-1);
+}
+
+static inline void 
+tiqdio_sched_tl(void)
+{
+	tasklet_hi_schedule(&tiqdio_tasklet);
+}
+
+static inline void
+qdio_mark_tiq(struct qdio_q *q)
+{
+	unsigned long flags;
+
+	QDIO_DBF_TEXT4(0,trace,"mark iq");
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+
+	spin_lock_irqsave(&ttiq_list_lock,flags);
+	if (unlikely(atomic_read(&q->is_in_shutdown)))
+		goto out_unlock;
+
+	if (!q->is_input_q)
+		goto out_unlock;
+
+	if ((q->list_prev) || (q->list_next)) 
+		goto out_unlock;
+
+	if (!tiq_list) {
+		tiq_list=q;
+		q->list_prev=q;
+		q->list_next=q;
+	} else {
+		q->list_next=tiq_list;
+		q->list_prev=tiq_list->list_prev;
+		tiq_list->list_prev->list_next=q;
+		tiq_list->list_prev=q;
+	}
+	spin_unlock_irqrestore(&ttiq_list_lock,flags);
+
+	tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
+	tiqdio_sched_tl();
+	return;
+out_unlock:
+	spin_unlock_irqrestore(&ttiq_list_lock,flags);
+	return;
+}
+
+static inline void
+qdio_mark_q(struct qdio_q *q)
+{
+	QDIO_DBF_TEXT4(0,trace,"mark q");
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+
+	if (unlikely(atomic_read(&q->is_in_shutdown)))
+		return;
+
+	tasklet_schedule(&q->tasklet);
+}
+
+static inline int
+qdio_stop_polling(struct qdio_q *q)
+{
+#ifdef QDIO_USE_PROCESSING_STATE
+	int gsf;
+
+	if (!atomic_swap(&q->polling,0)) 
+		return 1;
+
+	QDIO_DBF_TEXT4(0,trace,"stoppoll");
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+
+	/* show the card that we are not polling anymore */
+	if (!q->is_input_q)
+		return 1;
+
+	gsf=GET_SAVED_FRONTIER(q);
+	set_slsb(&q->slsb.acc.val[(gsf+QDIO_MAX_BUFFERS_PER_Q-1)&
+				  (QDIO_MAX_BUFFERS_PER_Q-1)],
+		 SLSB_P_INPUT_NOT_INIT);
+	/* 
+	 * we don't issue this SYNC_MEMORY, as we trust Rick T and
+	 * moreover will not use the PROCESSING state under VM, so
+	 * q->polling was 0 anyway
+	 */
+	/*SYNC_MEMORY;*/
+	if (q->slsb.acc.val[gsf]!=SLSB_P_INPUT_PRIMED)
+		return 1;
+	/* 
+	 * set our summary bit again, as otherwise there is a
+	 * small window we can miss between resetting it and
+	 * checking for PRIMED state 
+	 */
+	if (q->is_thinint_q)
+		tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
+	return 0;
+
+#else /* QDIO_USE_PROCESSING_STATE */
+	return 1;
+#endif /* QDIO_USE_PROCESSING_STATE */
+}
+
+/* 
+ * see the comment in do_QDIO and before qdio_reserve_q about the
+ * sophisticated locking outside of unmark_q, so that we don't need to
+ * disable the interrupts :-) 
+*/
+static inline void
+qdio_unmark_q(struct qdio_q *q)
+{
+	unsigned long flags;
+
+	QDIO_DBF_TEXT4(0,trace,"unmark q");
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+
+	if ((!q->list_prev)||(!q->list_next))
+		return;
+
+	if ((q->is_thinint_q)&&(q->is_input_q)) {
+		/* iQDIO */
+		spin_lock_irqsave(&ttiq_list_lock,flags);
+		/* in case cleanup has done this already and simultanously
+		 * qdio_unmark_q is called from the interrupt handler, we've
+		 * got to check this in this specific case again */
+		if ((!q->list_prev)||(!q->list_next))
+			goto out;
+		if (q->list_next==q) {
+			/* q was the only interesting q */
+			tiq_list=NULL;
+			q->list_next=NULL;
+			q->list_prev=NULL;
+		} else {
+			q->list_next->list_prev=q->list_prev;
+			q->list_prev->list_next=q->list_next;
+			tiq_list=q->list_next;
+			q->list_next=NULL;
+			q->list_prev=NULL;
+		}
+out:
+		spin_unlock_irqrestore(&ttiq_list_lock,flags);
+	}
+}
+
+static inline unsigned long 
+tiqdio_clear_global_summary(void)
+{
+	unsigned long time;
+
+	QDIO_DBF_TEXT5(0,trace,"clrglobl");
+	
+	time = do_clear_global_summary();
+
+	QDIO_DBF_HEX5(0,trace,&time,sizeof(unsigned long));
+
+	return time;
+}
+
+
+/************************* OUTBOUND ROUTINES *******************************/
+
+inline static int
+qdio_get_outbound_buffer_frontier(struct qdio_q *q)
+{
+	int f,f_mod_no;
+	volatile char *slsb;
+	int first_not_to_check;
+	char dbf_text[15];
+
+	QDIO_DBF_TEXT4(0,trace,"getobfro");
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+
+	slsb=&q->slsb.acc.val[0];
+	f_mod_no=f=q->first_to_check;
+	/* 
+	 * f points to already processed elements, so f+no_used is correct...
+	 * ... but: we don't check 128 buffers, as otherwise
+	 * qdio_has_outbound_q_moved would return 0 
+	 */
+	first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
+				      (QDIO_MAX_BUFFERS_PER_Q-1));
+
+	if ((!q->is_iqdio_q)&&(!q->hydra_gives_outbound_pcis))
+		SYNC_MEMORY;
+
+check_next:
+	if (f==first_not_to_check) 
+		goto out;
+
+	switch(slsb[f_mod_no]) {
+
+        /* the adapter has not fetched the output yet */
+	case SLSB_CU_OUTPUT_PRIMED:
+		QDIO_DBF_TEXT5(0,trace,"outpprim");
+		break;
+
+	/* the adapter got it */
+	case SLSB_P_OUTPUT_EMPTY:
+		atomic_dec(&q->number_of_buffers_used);
+		f++;
+		f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
+		QDIO_DBF_TEXT5(0,trace,"outpempt");
+		goto check_next;
+
+	case SLSB_P_OUTPUT_ERROR:
+		QDIO_DBF_TEXT3(0,trace,"outperr");
+		sprintf(dbf_text,"%x-%x-%x",f_mod_no,
+			q->sbal[f_mod_no]->element[14].sbalf.value,
+			q->sbal[f_mod_no]->element[15].sbalf.value);
+		QDIO_DBF_TEXT3(1,trace,dbf_text);
+		QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
+
+		/* kind of process the buffer */
+		set_slsb(&q->slsb.acc.val[f_mod_no], SLSB_P_OUTPUT_NOT_INIT);
+
+		/* 
+		 * we increment the frontier, as this buffer
+		 * was processed obviously 
+		 */
+		atomic_dec(&q->number_of_buffers_used);
+		f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
+
+		if (q->qdio_error)
+			q->error_status_flags|=
+				QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
+		q->qdio_error=SLSB_P_OUTPUT_ERROR;
+		q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
+
+		break;
+
+	/* no new buffers */
+	default:
+		QDIO_DBF_TEXT5(0,trace,"outpni");
+	}
+out:
+	return (q->first_to_check=f_mod_no);
+}
+
+/* all buffers are processed */
+inline static int
+qdio_is_outbound_q_done(struct qdio_q *q)
+{
+	int no_used;
+#ifdef CONFIG_QDIO_DEBUG
+	char dbf_text[15];
+#endif
+
+	no_used=atomic_read(&q->number_of_buffers_used);
+
+#ifdef CONFIG_QDIO_DEBUG
+	if (no_used) {
+		sprintf(dbf_text,"oqisnt%02x",no_used);
+		QDIO_DBF_TEXT4(0,trace,dbf_text);
+	} else {
+		QDIO_DBF_TEXT4(0,trace,"oqisdone");
+	}
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+#endif /* CONFIG_QDIO_DEBUG */
+	return (no_used==0);
+}
+
+inline static int
+qdio_has_outbound_q_moved(struct qdio_q *q)
+{
+	int i;
+
+	i=qdio_get_outbound_buffer_frontier(q);
+
+	if ( (i!=GET_SAVED_FRONTIER(q)) ||
+	     (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
+		SAVE_FRONTIER(q,i);
+		QDIO_DBF_TEXT4(0,trace,"oqhasmvd");
+		QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+		return 1;
+	} else {
+		QDIO_DBF_TEXT4(0,trace,"oqhsntmv");
+		QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+		return 0;
+	}
+}
+
+inline static void
+qdio_kick_outbound_q(struct qdio_q *q)
+{
+	int result;
+#ifdef CONFIG_QDIO_DEBUG
+	char dbf_text[15];
+
+	QDIO_DBF_TEXT4(0,trace,"kickoutq");
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+#endif /* CONFIG_QDIO_DEBUG */
+
+	if (!q->siga_out)
+		return;
+
+	/* here's the story with cc=2 and busy bit set (thanks, Rick):
+	 * VM's CP could present us cc=2 and busy bit set on SIGA-write
+	 * during reconfiguration of their Guest LAN (only in HIPERS mode,
+	 * QDIO mode is asynchronous -- cc=2 and busy bit there will take
+	 * the queues down immediately; and not being under VM we have a
+	 * problem on cc=2 and busy bit set right away).
+	 *
+	 * Therefore qdio_siga_output will try for a short time constantly,
+	 * if such a condition occurs. If it doesn't change, it will
+	 * increase the busy_siga_counter and save the timestamp, and
+	 * schedule the queue for later processing (via mark_q, using the
+	 * queue tasklet). __qdio_outbound_processing will check out the
+	 * counter. If non-zero, it will call qdio_kick_outbound_q as often
+	 * as the value of the counter. This will attempt further SIGA
+	 * instructions. For each successful SIGA, the counter is
+	 * decreased, for failing SIGAs the counter remains the same, after
+	 * all.
+	 * After some time of no movement, qdio_kick_outbound_q will
+	 * finally fail and reflect corresponding error codes to call
+	 * the upper layer module and have it take the queues down.
+	 *
+	 * Note that this is a change from the original HiperSockets design
+	 * (saying cc=2 and busy bit means take the queues down), but in
+	 * these days Guest LAN didn't exist... excessive cc=2 with busy bit
+	 * conditions will still take the queues down, but the threshold is
+	 * higher due to the Guest LAN environment.
+	 */
+
+
+	result=qdio_siga_output(q);
+
+		switch (result) {
+		case 0:
+			/* went smooth this time, reset timestamp */
+#ifdef CONFIG_QDIO_DEBUG
+			QDIO_DBF_TEXT3(0,trace,"cc2reslv");
+			sprintf(dbf_text,"%4x%2x%2x",q->irq,q->q_no,
+				atomic_read(&q->busy_siga_counter));
+			QDIO_DBF_TEXT3(0,trace,dbf_text);
+#endif /* CONFIG_QDIO_DEBUG */
+			q->timing.busy_start=0;
+			break;
+		case (2|QDIO_SIGA_ERROR_B_BIT_SET):
+			/* cc=2 and busy bit: */
+			atomic_inc(&q->busy_siga_counter);
+
+			/* if the last siga was successful, save
+			 * timestamp here */
+			if (!q->timing.busy_start)
+				q->timing.busy_start=NOW;
+
+			/* if we're in time, don't touch error_status_flags
+			 * and siga_error */
+			if (NOW-q->timing.busy_start<QDIO_BUSY_BIT_GIVE_UP) {
+				qdio_mark_q(q);
+				break;
+			}
+			QDIO_DBF_TEXT2(0,trace,"cc2REPRT");
+#ifdef CONFIG_QDIO_DEBUG
+			sprintf(dbf_text,"%4x%2x%2x",q->irq,q->q_no,
+				atomic_read(&q->busy_siga_counter));
+			QDIO_DBF_TEXT3(0,trace,dbf_text);
+#endif /* CONFIG_QDIO_DEBUG */
+			/* else fallthrough and report error */
+		default:
+			/* for plain cc=1, 2 or 3: */
+			if (q->siga_error)
+				q->error_status_flags|=
+					QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
+			q->error_status_flags|=
+				QDIO_STATUS_LOOK_FOR_ERROR;
+			q->siga_error=result;
+		}
+}
+
+inline static void
+qdio_kick_outbound_handler(struct qdio_q *q)
+{
+	int start, end, real_end, count;
+#ifdef CONFIG_QDIO_DEBUG
+	char dbf_text[15];
+#endif
+
+	start = q->first_element_to_kick;
+	/* last_move_ftc was just updated */
+	real_end = GET_SAVED_FRONTIER(q);
+	end = (real_end+QDIO_MAX_BUFFERS_PER_Q-1)&
+		(QDIO_MAX_BUFFERS_PER_Q-1);
+	count = (end+QDIO_MAX_BUFFERS_PER_Q+1-start)&
+		(QDIO_MAX_BUFFERS_PER_Q-1);
+
+#ifdef CONFIG_QDIO_DEBUG
+	QDIO_DBF_TEXT4(0,trace,"kickouth");
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+
+	sprintf(dbf_text,"s=%2xc=%2x",start,count);
+	QDIO_DBF_TEXT4(0,trace,dbf_text);
+#endif /* CONFIG_QDIO_DEBUG */
+
+	if (q->state==QDIO_IRQ_STATE_ACTIVE)
+		q->handler(q->cdev,QDIO_STATUS_OUTBOUND_INT|
+			   q->error_status_flags,
+			   q->qdio_error,q->siga_error,q->q_no,start,count,
+			   q->int_parm);
+
+	/* for the next time: */
+	q->first_element_to_kick=real_end;
+	q->qdio_error=0;
+	q->siga_error=0;
+	q->error_status_flags=0;
+}
+
+static inline void
+__qdio_outbound_processing(struct qdio_q *q)
+{
+	int siga_attempts;
+
+	QDIO_DBF_TEXT4(0,trace,"qoutproc");
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+
+	if (unlikely(qdio_reserve_q(q))) {
+		qdio_release_q(q);
+#ifdef QDIO_PERFORMANCE_STATS
+		o_p_c++;
+#endif /* QDIO_PERFORMANCE_STATS */
+		/* as we're sissies, we'll check next time */
+		if (likely(!atomic_read(&q->is_in_shutdown))) {
+			qdio_mark_q(q);
+			QDIO_DBF_TEXT4(0,trace,"busy,agn");
+		}
+		return;
+	}
+#ifdef QDIO_PERFORMANCE_STATS
+	o_p_nc++;
+	perf_stats.tl_runs++;
+#endif /* QDIO_PERFORMANCE_STATS */
+
+	/* see comment in qdio_kick_outbound_q */
+	siga_attempts=atomic_read(&q->busy_siga_counter);
+	while (siga_attempts) {
+		atomic_dec(&q->busy_siga_counter);
+		qdio_kick_outbound_q(q);
+		siga_attempts--;
+	}
+
+	if (qdio_has_outbound_q_moved(q))
+		qdio_kick_outbound_handler(q);
+
+	if (q->is_iqdio_q) {
+		/* 
+		 * for asynchronous queues, we better check, if the fill
+		 * level is too high. for synchronous queues, the fill
+		 * level will never be that high. 
+		 */
+		if (atomic_read(&q->number_of_buffers_used)>
+		    IQDIO_FILL_LEVEL_TO_POLL)
+			qdio_mark_q(q);
+
+	} else if (!q->hydra_gives_outbound_pcis)
+		if (!qdio_is_outbound_q_done(q))
+			qdio_mark_q(q);
+
+	qdio_release_q(q);
+}
+
+static void
+qdio_outbound_processing(struct qdio_q *q)
+{
+	__qdio_outbound_processing(q);
+}
+
+/************************* INBOUND ROUTINES *******************************/
+
+
+inline static int
+qdio_get_inbound_buffer_frontier(struct qdio_q *q)
+{
+	int f,f_mod_no;
+	volatile char *slsb;
+	int first_not_to_check;
+#ifdef CONFIG_QDIO_DEBUG
+	char dbf_text[15];
+#endif /* CONFIG_QDIO_DEBUG */
+#ifdef QDIO_USE_PROCESSING_STATE
+	int last_position=-1;
+#endif /* QDIO_USE_PROCESSING_STATE */
+
+	QDIO_DBF_TEXT4(0,trace,"getibfro");
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+
+	slsb=&q->slsb.acc.val[0];
+	f_mod_no=f=q->first_to_check;
+	/* 
+	 * we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
+	 * would return 0 
+	 */
+	first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
+				      (QDIO_MAX_BUFFERS_PER_Q-1));
+
+	/* 
+	 * we don't use this one, as a PCI or we after a thin interrupt
+	 * will sync the queues
+	 */
+	/* SYNC_MEMORY;*/
+
+check_next:
+	f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
+	if (f==first_not_to_check) 
+		goto out;
+	switch (slsb[f_mod_no]) {
+
+	/* CU_EMPTY means frontier is reached */
+	case SLSB_CU_INPUT_EMPTY:
+		QDIO_DBF_TEXT5(0,trace,"inptempt");
+		break;
+
+	/* P_PRIMED means set slsb to P_PROCESSING and move on */
+	case SLSB_P_INPUT_PRIMED:
+		QDIO_DBF_TEXT5(0,trace,"inptprim");
+
+#ifdef QDIO_USE_PROCESSING_STATE
+		/* 
+		 * as soon as running under VM, polling the input queues will
+		 * kill VM in terms of CP overhead 
+		 */
+		if (q->siga_sync) {
+			set_slsb(&slsb[f_mod_no],SLSB_P_INPUT_NOT_INIT);
+		} else {
+			/* set the previous buffer to NOT_INIT. The current
+			 * buffer will be set to PROCESSING at the end of
+			 * this function to avoid further interrupts. */
+			if (last_position>=0)
+				set_slsb(&slsb[last_position],
+					 SLSB_P_INPUT_NOT_INIT);
+			atomic_set(&q->polling,1);
+			last_position=f_mod_no;
+		}
+#else /* QDIO_USE_PROCESSING_STATE */
+		set_slsb(&slsb[f_mod_no],SLSB_P_INPUT_NOT_INIT);
+#endif /* QDIO_USE_PROCESSING_STATE */
+		/* 
+		 * not needed, as the inbound queue will be synced on the next
+		 * siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
+		 */
+		/*SYNC_MEMORY;*/
+		f++;
+		atomic_dec(&q->number_of_buffers_used);
+		goto check_next;
+
+	case SLSB_P_INPUT_NOT_INIT:
+	case SLSB_P_INPUT_PROCESSING:
+		QDIO_DBF_TEXT5(0,trace,"inpnipro");
+		break;
+
+	/* P_ERROR means frontier is reached, break and report error */
+	case SLSB_P_INPUT_ERROR:
+#ifdef CONFIG_QDIO_DEBUG
+		sprintf(dbf_text,"inperr%2x",f_mod_no);
+		QDIO_DBF_TEXT3(1,trace,dbf_text);
+#endif /* CONFIG_QDIO_DEBUG */
+		QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
+
+		/* kind of process the buffer */
+		set_slsb(&slsb[f_mod_no],SLSB_P_INPUT_NOT_INIT);
+
+		if (q->qdio_error)
+			q->error_status_flags|=
+				QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
+		q->qdio_error=SLSB_P_INPUT_ERROR;
+		q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
+
+		/* we increment the frontier, as this buffer
+		 * was processed obviously */
+		f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
+		atomic_dec(&q->number_of_buffers_used);
+
+#ifdef QDIO_USE_PROCESSING_STATE
+		last_position=-1;
+#endif /* QDIO_USE_PROCESSING_STATE */
+
+		break;
+
+	/* everything else means frontier not changed (HALTED or so) */
+	default: 
+		break;
+	}
+out:
+	q->first_to_check=f_mod_no;
+
+#ifdef QDIO_USE_PROCESSING_STATE
+	if (last_position>=0)
+		set_slsb(&slsb[last_position],SLSB_P_INPUT_PROCESSING);
+#endif /* QDIO_USE_PROCESSING_STATE */
+
+	QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
+
+	return q->first_to_check;
+}
+
+inline static int
+qdio_has_inbound_q_moved(struct qdio_q *q)
+{
+	int i;
+
+#ifdef QDIO_PERFORMANCE_STATS
+	static int old_pcis=0;
+	static int old_thinints=0;
+
+	if ((old_pcis==perf_stats.pcis)&&(old_thinints==perf_stats.thinints))
+		perf_stats.start_time_inbound=NOW;
+	else
+		old_pcis=perf_stats.pcis;
+#endif /* QDIO_PERFORMANCE_STATS */
+
+	i=qdio_get_inbound_buffer_frontier(q);
+	if ( (i!=GET_SAVED_FRONTIER(q)) ||
+	     (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
+		SAVE_FRONTIER(q,i);
+		if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis))
+			SAVE_TIMESTAMP(q);
+
+		QDIO_DBF_TEXT4(0,trace,"inhasmvd");
+		QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+		return 1;
+	} else {
+		QDIO_DBF_TEXT4(0,trace,"inhsntmv");
+		QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+		return 0;
+	}
+}
+
+/* means, no more buffers to be filled */
+inline static int
+tiqdio_is_inbound_q_done(struct qdio_q *q)
+{
+	int no_used;
+#ifdef CONFIG_QDIO_DEBUG
+	char dbf_text[15];
+#endif
+
+	no_used=atomic_read(&q->number_of_buffers_used);
+
+	/* propagate the change from 82 to 80 through VM */
+	SYNC_MEMORY;
+
+#ifdef CONFIG_QDIO_DEBUG
+	if (no_used) {
+		sprintf(dbf_text,"iqisnt%02x",no_used);
+		QDIO_DBF_TEXT4(0,trace,dbf_text);
+	} else {
+		QDIO_DBF_TEXT4(0,trace,"iniqisdo");
+	}
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+#endif /* CONFIG_QDIO_DEBUG */
+
+	if (!no_used)
+		return 1;
+
+	if (!q->siga_sync)
+		/* we'll check for more primed buffers in qeth_stop_polling */
+		return 0;
+
+	if (q->slsb.acc.val[q->first_to_check]!=SLSB_P_INPUT_PRIMED)
+		/* 
+		 * nothing more to do, if next buffer is not PRIMED.
+		 * note that we did a SYNC_MEMORY before, that there
+		 * has been a sychnronization.
+		 * we will return 0 below, as there is nothing to do
+		 * (stop_polling not necessary, as we have not been
+		 * using the PROCESSING state 
+		 */
+		return 0;
+
+	/* 
+	 * ok, the next input buffer is primed. that means, that device state 
+	 * change indicator and adapter local summary are set, so we will find
+	 * it next time.
+	 * we will return 0 below, as there is nothing to do, except scheduling
+	 * ourselves for the next time. 
+	 */
+	tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
+	tiqdio_sched_tl();
+	return 0;
+}
+
+inline static int
+qdio_is_inbound_q_done(struct qdio_q *q)
+{
+	int no_used;
+#ifdef CONFIG_QDIO_DEBUG
+	char dbf_text[15];
+#endif
+
+	no_used=atomic_read(&q->number_of_buffers_used);
+
+	/* 
+	 * we need that one for synchronization with the adapter, as it
+	 * does a kind of PCI avoidance 
+	 */
+	SYNC_MEMORY;
+
+	if (!no_used) {
+		QDIO_DBF_TEXT4(0,trace,"inqisdnA");
+		QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+		QDIO_DBF_TEXT4(0,trace,dbf_text);
+		return 1;
+	}
+
+	if (q->slsb.acc.val[q->first_to_check]==SLSB_P_INPUT_PRIMED) {
+		/* we got something to do */
+		QDIO_DBF_TEXT4(0,trace,"inqisntA");
+		QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+		return 0;
+	}
+
+	/* on VM, we don't poll, so the q is always done here */
+	if (q->siga_sync)
+		return 1;
+	if (q->hydra_gives_outbound_pcis)
+		return 1;
+
+	/* 
+	 * at this point we know, that inbound first_to_check
+	 * has (probably) not moved (see qdio_inbound_processing) 
+	 */
+	if (NOW>GET_SAVED_TIMESTAMP(q)+q->timing.threshold) {
+#ifdef CONFIG_QDIO_DEBUG
+		QDIO_DBF_TEXT4(0,trace,"inqisdon");
+		QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+		sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
+		QDIO_DBF_TEXT4(0,trace,dbf_text);
+#endif /* CONFIG_QDIO_DEBUG */
+		return 1;
+	} else {
+#ifdef CONFIG_QDIO_DEBUG
+		QDIO_DBF_TEXT4(0,trace,"inqisntd");
+		QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+		sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
+		QDIO_DBF_TEXT4(0,trace,dbf_text);
+#endif /* CONFIG_QDIO_DEBUG */
+		return 0;
+	}
+}
+
+inline static void
+qdio_kick_inbound_handler(struct qdio_q *q)
+{
+	int count, start, end, real_end, i;
+#ifdef CONFIG_QDIO_DEBUG
+	char dbf_text[15];
+#endif
+
+	QDIO_DBF_TEXT4(0,trace,"kickinh");
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+
+  	start=q->first_element_to_kick;
+ 	real_end=q->first_to_check;
+ 	end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&(QDIO_MAX_BUFFERS_PER_Q-1);
+ 
+ 	i=start;
+	count=0;
+ 	while (1) {
+ 		count++;
+ 		if (i==end)
+			break;
+ 		i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
+ 	}
+
+#ifdef CONFIG_QDIO_DEBUG
+	sprintf(dbf_text,"s=%2xc=%2x",start,count);
+	QDIO_DBF_TEXT4(0,trace,dbf_text);
+#endif /* CONFIG_QDIO_DEBUG */
+
+	if (likely(q->state==QDIO_IRQ_STATE_ACTIVE))
+		q->handler(q->cdev,
+			   QDIO_STATUS_INBOUND_INT|q->error_status_flags,
+			   q->qdio_error,q->siga_error,q->q_no,start,count,
+			   q->int_parm);
+
+	/* for the next time: */
+	q->first_element_to_kick=real_end;
+	q->qdio_error=0;
+	q->siga_error=0;
+	q->error_status_flags=0;
+
+#ifdef QDIO_PERFORMANCE_STATS
+	perf_stats.inbound_time+=NOW-perf_stats.start_time_inbound;
+	perf_stats.inbound_cnt++;
+#endif /* QDIO_PERFORMANCE_STATS */
+}
+
+static inline void
+__tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
+{
+	struct qdio_irq *irq_ptr;
+	struct qdio_q *oq;
+	int i;
+
+	QDIO_DBF_TEXT4(0,trace,"iqinproc");
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+
+	/* 
+	 * we first want to reserve the q, so that we know, that we don't
+	 * interrupt ourselves and call qdio_unmark_q, as is_in_shutdown might
+	 * be set 
+	 */
+	if (unlikely(qdio_reserve_q(q))) {
+		qdio_release_q(q);
+#ifdef QDIO_PERFORMANCE_STATS
+		ii_p_c++;
+#endif /* QDIO_PERFORMANCE_STATS */
+		/* 
+		 * as we might just be about to stop polling, we make
+		 * sure that we check again at least once more 
+		 */
+		tiqdio_sched_tl();
+		return;
+	}
+#ifdef QDIO_PERFORMANCE_STATS
+	ii_p_nc++;
+#endif /* QDIO_PERFORMANCE_STATS */
+	if (unlikely(atomic_read(&q->is_in_shutdown))) {
+		qdio_unmark_q(q);
+		goto out;
+	}
+
+	/* 
+	 * we reset spare_ind_was_set, when the queue does not use the
+	 * spare indicator
+	 */
+	if (spare_ind_was_set)
+		spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator);
+
+	if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set)
+		goto out;
+	/*
+	 * q->dev_st_chg_ind is the indicator, be it shared or not.
+	 * only clear it, if indicator is non-shared
+	 */
+	if (!spare_ind_was_set)
+		tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);
+
+	if (q->hydra_gives_outbound_pcis) {
+		if (!q->siga_sync_done_on_thinints) {
+			SYNC_MEMORY_ALL;
+		} else if ((!q->siga_sync_done_on_outb_tis)&&
+			 (q->hydra_gives_outbound_pcis)) {
+			SYNC_MEMORY_ALL_OUTB;
+		}
+	} else {
+		SYNC_MEMORY;
+	}
+	/*
+	 * maybe we have to do work on our outbound queues... at least
+	 * we have to check the outbound-int-capable thinint-capable
+	 * queues
+	 */
+	if (q->hydra_gives_outbound_pcis) {
+		irq_ptr = (struct qdio_irq*)q->irq_ptr;
+		for (i=0;i<irq_ptr->no_output_qs;i++) {
+			oq = irq_ptr->output_qs[i];
+#ifdef QDIO_PERFORMANCE_STATS
+			perf_stats.tl_runs--;
+#endif /* QDIO_PERFORMANCE_STATS */
+			if (!qdio_is_outbound_q_done(oq))
+				__qdio_outbound_processing(oq);
+		}
+	}
+
+	if (!qdio_has_inbound_q_moved(q))
+		goto out;
+
+	qdio_kick_inbound_handler(q);
+	if (tiqdio_is_inbound_q_done(q))
+		if (!qdio_stop_polling(q)) {
+			/* 
+			 * we set the flags to get into the stuff next time,
+			 * see also comment in qdio_stop_polling 
+			 */
+			tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
+			tiqdio_sched_tl();
+		}
+out:
+	qdio_release_q(q);
+}
+
+static void
+tiqdio_inbound_processing(struct qdio_q *q)
+{
+	__tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount));
+}
+
+static inline void
+__qdio_inbound_processing(struct qdio_q *q)
+{
+	int q_laps=0;
+
+	QDIO_DBF_TEXT4(0,trace,"qinproc");
+	QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
+
+	if (unlikely(qdio_reserve_q(q))) {
+		qdio_release_q(q);
+#ifdef QDIO_PERFORMANCE_STATS
+		i_p_c++;
+#endif /* QDIO_PERFORMANCE_STATS */
+		/* as we're sissies, we'll check next time */
+		if (likely(!atomic_read(&q->is_in_shutdown))) {
+			qdio_mark_q(q);
+			QDIO_DBF_TEXT4(0,trace,"busy,agn");
+		}
+		return;
+	}
+#ifdef QDIO_PERFORMANCE_STATS
+	i_p_nc++;
+	perf_stats.tl_runs++;
+#endif /* QDIO_PERFORMANCE_STATS */
+
+again:
+	if (qdio_has_inbound_q_moved(q)) {
+		qdio_kick_inbound_handler(q);
+		if (!qdio_stop_polling(q)) {
+			q_laps++;
+			if (q_laps<QDIO_Q_LAPS) 
+				goto again;
+		}
+		qdio_mark_q(q);
+	} else {
+		if (!qdio_is_inbound_q_done(q))