File: [Development] / linux-2.4-xfs / drivers / s390 / qdio.c (download)
Revision 1.2, Mon Nov 22 13:43:01 2004 UTC (12 years, 11 months ago) by nathans.longdrop.melbourne.sgi.com
Branch: MAIN
CVS Tags: HEAD
Changes since 1.1: +272 -86
lines
Merge up to 2.4.28.
Merge of 2.4.x-xfs-melb:linux:20239a by kenmcd.
|
/*
*
* linux/drivers/s390/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>
*
* 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.
*/
/* we want the eyecatcher to be at the top of the code */
void volatile qdio_eyecatcher(void)
{
return;
}
#include <linux/config.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/atomic.h>
#include <asm/semaphore.h>
#include <asm/page.h>
#include <asm/debug.h>
#include <asm/qdio.h>
#define VERSION_QDIO_C "$Revision: 1.145.4.9 $"
/****************** MODULE PARAMETER VARIABLES ********************/
MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
MODULE_DESCRIPTION("QDIO base support version 2, " \
"Copyright 2000 IBM Corporation");
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,12))
MODULE_LICENSE("GPL");
#endif
/******************** HERE WE GO ***********************************/
static const char *version="QDIO base support version 2 ("
VERSION_QDIO_C "/" VERSION_QDIO_H ")";
#ifdef QDIO_PERFORMANCE_STATS
static int proc_perf_file_registration;
unsigned long i_p_c=0,i_p_nc=0,o_p_c=0,o_p_nc=0,ii_p_c=0,ii_p_nc=0;
static struct {
unsigned int tl_runs;
unsigned int siga_outs;
unsigned int siga_ins;
unsigned int siga_syncs;
unsigned int pcis;
unsigned int thinints;
unsigned int fast_reqs;
__u64 start_time_outbound;
unsigned int outbound_cnt;
unsigned int outbound_time;
__u64 start_time_inbound;
unsigned int inbound_cnt;
unsigned int inbound_time;
} perf_stats;
#endif /* QDIO_PERFORMANCE_STATS */
static int hydra_thinints=0;
static int omit_svs=0;
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=NULL;
static debug_info_t *qdio_dbf_sbal=NULL;
static debug_info_t *qdio_dbf_trace=NULL;
static debug_info_t *qdio_dbf_sense=NULL;
#ifdef QDIO_DBF_LIKE_HELL
static debug_info_t *qdio_dbf_slsb_out=NULL;
static debug_info_t *qdio_dbf_slsb_in=NULL;
#endif /* QDIO_DBF_LIKE_HELL */
static qdio_irq_t *first_irq[QDIO_IRQ_BUCKETS]={
[0 ... (QDIO_IRQ_BUCKETS-1)] = NULL
};
static rwlock_t irq_list_lock[QDIO_IRQ_BUCKETS]={
[0 ... (QDIO_IRQ_BUCKETS-1)] = RW_LOCK_UNLOCKED
};
static struct semaphore init_sema;
static qdio_chsc_area_t *chsc_area;
static spinlock_t chsc_area_lock=SPIN_LOCK_UNLOCKED;
/* iQDIO stuff: */
static volatile qdio_q_t *tiq_list=NULL; /* volatile as it could change
during a while loop */
static spinlock_t ttiq_list_lock=SPIN_LOCK_UNLOCKED;
static int register_thinint_result;
static void tiqdio_tl(unsigned long);
static DECLARE_TASKLET(tiqdio_tasklet,tiqdio_tl,0);
#define HEXDUMP16(importance,header,ptr) \
QDIO_PRINT_##importance(header "%02x %02x %02x %02x " \
"%02x %02x %02x %02x %02x %02x %02x %02x " \
"%02x %02x %02x %02x\n",*(((char*)ptr)), \
*(((char*)ptr)+1),*(((char*)ptr)+2), \
*(((char*)ptr)+3),*(((char*)ptr)+4), \
*(((char*)ptr)+5),*(((char*)ptr)+6), \
*(((char*)ptr)+7),*(((char*)ptr)+8), \
*(((char*)ptr)+9),*(((char*)ptr)+10), \
*(((char*)ptr)+11),*(((char*)ptr)+12), \
*(((char*)ptr)+13),*(((char*)ptr)+14), \
*(((char*)ptr)+15)); \
QDIO_PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \
"%02x %02x %02x %02x %02x %02x %02x %02x\n", \
*(((char*)ptr)+16),*(((char*)ptr)+17), \
*(((char*)ptr)+18),*(((char*)ptr)+19), \
*(((char*)ptr)+20),*(((char*)ptr)+21), \
*(((char*)ptr)+22),*(((char*)ptr)+23), \
*(((char*)ptr)+24),*(((char*)ptr)+25), \
*(((char*)ptr)+26),*(((char*)ptr)+27), \
*(((char*)ptr)+28),*(((char*)ptr)+29), \
*(((char*)ptr)+30),*(((char*)ptr)+31));
#define atomic_swap(a,b) xchg((int*)a.counter,b)
/* 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;
}
/* unlikely as the later the better */
#define SYNC_MEMORY if (unlikely(q->siga_sync)) qdio_siga_sync_q(q)
#define SYNC_MEMORY_ALL if (unlikely(q->siga_sync)) \
qdio_siga_sync(q,~0U,~0U)
#define SYNC_MEMORY_ALL_OUTB if (unlikely(q->siga_sync)) \
qdio_siga_sync(q,~0U,0)
#define NOW qdio_get_micros()
#define SAVE_TIMESTAMP(q) q->timing.last_transfer_time=NOW
#define GET_SAVED_TIMESTAMP(q) (q->timing.last_transfer_time)
#define SAVE_FRONTIER(q,val) q->last_move_ftc=val
#define GET_SAVED_FRONTIER(q) (q->last_move_ftc)
#define MY_MODULE_STRING(x) #x
#ifdef QDIO_32_BIT
#define QDIO_GET_32BIT_ADDR(x) ((__u32)(long)x)
#else /* QDIO_32_BIT */
#define QDIO_GET_32BIT_ADDR(x) ((__u32)(unsigned long)x)
#endif /* QDIO_32_BIT */
#define QDIO_PFIX_GET_ADDR(x) ((flags&QDIO_PFIX) ? \
pfix_get_addr(x):((unsigned long)x))
/***************** SCRUBBER HELPER ROUTINES **********************/
static inline volatile __u64 qdio_get_micros(void)
{
__u64 time;
asm volatile ("STCK %0" : "=m" (time));
return time>>12; /* time>>12 is microseconds*/
}
static inline unsigned long qdio_get_millis(void)
{
return (unsigned long)(qdio_get_micros()>>10);
}
static __inline__ int atomic_return_add (int i, atomic_t *v)
{
int old, new;
__CS_LOOP(old, new, v, i, "ar");
return old;
}
static void qdio_wait_nonbusy(unsigned int timeout)
{
unsigned int start;
char dbf_text[15];
sprintf(dbf_text,"wtnb%4x",timeout);
QDIO_DBF_TEXT3(0,trace,dbf_text);
start=qdio_get_millis();
for (;;) {
set_task_state(current,TASK_INTERRUPTIBLE);
if (qdio_get_millis()-start>timeout) {
goto out;
}
schedule_timeout(((start+timeout-qdio_get_millis())>>10)*HZ);
}
out:
set_task_state(current,TASK_RUNNING);
}
static int qdio_wait_for_no_use_count(atomic_t *use_count)
{
unsigned long start;
QDIO_DBF_TEXT3(0,trace,"wtnousec");
start=qdio_get_millis();
for (;;) {
if (qdio_get_millis()-start>QDIO_NO_USE_COUNT_TIMEOUT) {
QDIO_DBF_TEXT1(1,trace,"WTNOUSTO");
return -ETIME;
}
if (!atomic_read(use_count)) {
QDIO_DBF_TEXT3(0,trace,"wtnoused");
return 0;
}
qdio_wait_nonbusy(QDIO_NO_USE_COUNT_TIME);
}
}
/* 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(qdio_q_t *q)
{
return atomic_return_add(1,&q->use_count);
}
static inline void qdio_release_q(qdio_q_t *q)
{
atomic_dec(&q->use_count);
}
#ifdef QDIO_DBF_LIKE_HELL
#define set_slsb(x,y) \
if(q->queue_type==QDIO_TRACE_QTYPE) { \
if(q->is_input_q) { \
QDIO_DBF_HEX2(0,slsb_in,&q->slsb,QDIO_MAX_BUFFERS_PER_Q); \
} else { \
QDIO_DBF_HEX2(0,slsb_out,&q->slsb,QDIO_MAX_BUFFERS_PER_Q); \
} \
} \
qdio_set_slsb(x,y); \
if(q->queue_type==QDIO_TRACE_QTYPE) { \
if(q->is_input_q) { \
QDIO_DBF_HEX2(0,slsb_in,&q->slsb,QDIO_MAX_BUFFERS_PER_Q); \
} else { \
QDIO_DBF_HEX2(0,slsb_out,&q->slsb,QDIO_MAX_BUFFERS_PER_Q); \
} \
}
#else /* QDIO_DBF_LIKE_HELL */
#define set_slsb(x,y) qdio_set_slsb(x,y)
#endif /* QDIO_DBF_LIKE_HELL */
static volatile inline void qdio_set_slsb(volatile char *slsb,
unsigned char value)
{
xchg((char*)slsb,value);
}
static inline int qdio_siga_sync(qdio_q_t *q,
unsigned int gpr2,
unsigned int gpr3)
{
int cc;
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"sigasync");
QDIO_DBF_HEX4(0,trace,&q,sizeof(int));
QDIO_DBF_HEX4(0,trace,&gpr2,sizeof(int));
QDIO_DBF_HEX4(0,trace,&gpr3,sizeof(int));
#endif /* QDIO_DBF_LIKE_HELL */
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.siga_syncs++;
#endif /* QDIO_PERFORMANCE_STATS */
#ifdef QDIO_32_BIT
asm volatile (
"lhi 0,2 \n\t"
"lr 1,%1 \n\t"
"lr 2,%2 \n\t"
"lr 3,%3 \n\t"
"siga 0 \n\t"
"ipm %0 \n\t"
"srl %0,28 \n\t"
: "=d" (cc)
: "d" (0x10000|q->irq), "d" (gpr2), "d" (gpr3)
: "cc", "0", "1", "2", "3"
);
#else /* QDIO_32_BIT */
asm volatile (
"lghi 0,2 \n\t"
"llgfr 1,%1 \n\t"
"llgfr 2,%2 \n\t"
"llgfr 3,%3 \n\t"
"siga 0 \n\t"
"ipm %0 \n\t"
"srl %0,28 \n\t"
: "=d" (cc)
: "d" (0x10000|q->irq), "d" (gpr2), "d" (gpr3)
: "cc", "0", "1", "2", "3"
);
#endif /* QDIO_32_BIT */
if (cc) {
#ifndef QDIO_DBF_LIKE_HELL
/* when QDIO_DBF_LIKE_HELL, we put that already out */
QDIO_DBF_TEXT3(0,trace,"sigasync");
QDIO_DBF_HEX3(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
}
return cc;
}
static inline int qdio_siga_sync_q(qdio_q_t *q)
{
if (q->is_input_q) {
return qdio_siga_sync(q,0,q->mask);
} else {
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(qdio_q_t *q)
{
int cc;
__u32 busy_bit;
__u64 start_time=0;
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.siga_outs++;
#endif /* QDIO_PERFORMANCE_STATS */
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"sigaout");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
for (;;) {
#ifdef QDIO_32_BIT
asm volatile (
"lhi 0,0 \n\t"
"lr 1,%2 \n\t"
"lr 2,%3 \n\t"
"siga 0 \n\t"
"0:"
"ipm %0 \n\t"
"srl %0,28 \n\t"
"srl 0,31 \n\t"
"lr %1,0 \n\t"
"1: \n\t"
".section .fixup,\"ax\"\n\t"
"2: \n\t"
"lhi %0,%4 \n\t"
"bras 1,3f \n\t"
".long 1b \n\t"
"3: \n\t"
"l 1,0(1) \n\t"
"br 1 \n\t"
".previous \n\t"
".section __ex_table,\"a\"\n\t"
".align 4 \n\t"
".long 0b,2b \n\t"
".previous \n\t"
: "=d" (cc), "=d" (busy_bit)
: "d" (0x10000|q->irq), "d" (q->mask),
"i" (QDIO_SIGA_ERROR_ACCESS_EXCEPTION)
: "cc", "0", "1", "2", "memory"
);
#else /* QDIO_32_BIT */
asm volatile (
"lghi 0,0 \n\t"
"llgfr 1,%2 \n\t"
"llgfr 2,%3 \n\t"
"siga 0 \n\t"
"0:"
"ipm %0 \n\t"
"srl %0,28 \n\t"
"srl 0,31 \n\t"
"llgfr %1,0 \n\t"
"1: \n\t"
".section .fixup,\"ax\"\n\t"
"lghi %0,%4 \n\t"
"jg 1b \n\t"
".previous\n\t"
".section __ex_table,\"a\"\n\t"
".align 8 \n\t"
".quad 0b,1b \n\t"
".previous \n\t"
: "=d" (cc), "=d" (busy_bit)
: "d" (0x10000|q->irq), "d" (q->mask),
"i" (QDIO_SIGA_ERROR_ACCESS_EXCEPTION)
: "cc", "0", "1", "2", "memory"
);
#endif /* QDIO_32_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) {
#ifndef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT3(0,trace,"sigaout");
QDIO_DBF_HEX3(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
}
return cc;
}
static inline int qdio_siga_input(qdio_q_t *q)
{
int cc;
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"sigain");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.siga_ins++;
#endif /* QDIO_PERFORMANCE_STATS */
#ifdef QDIO_32_BIT
asm volatile (
"lhi 0,1 \n\t"
"lr 1,%1 \n\t"
"lr 2,%2 \n\t"
"siga 0 \n\t"
"ipm %0 \n\t"
"srl %0,28 \n\t"
: "=d" (cc)
: "d" (0x10000|q->irq), "d" (q->mask)
: "cc", "0", "1", "2", "memory"
);
#else /* QDIO_32_BIT */
asm volatile (
"lghi 0,1 \n\t"
"llgfr 1,%1 \n\t"
"llgfr 2,%2 \n\t"
"siga 0 \n\t"
"ipm %0 \n\t"
"srl %0,28 \n\t"
: "=d" (cc)
: "d" (0x10000|q->irq), "d" (q->mask)
: "cc", "0", "1", "2", "memory"
);
#endif /* QDIO_32_BIT */
if (cc) {
#ifndef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT3(0,trace,"sigain");
QDIO_DBF_HEX3(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
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=1;
int found=0;
while (i<INDICATORS_PER_CACHELINE) {
if (!indicator_used[i]) {
indicator_used[i]=1;
found=1;
break;
}
i++;
}
if (found)
return indicators+i;
else {
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)
{
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT5(0,trace,"clrsummb");
QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
xchg(location,0);
}
static inline volatile void tiqdio_set_summary_bit(__u32 *location)
{
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT5(0,trace,"setsummb");
QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
xchg(location,-1);
}
static inline void tiqdio_sched_tl(void)
{
tasklet_hi_schedule(&tiqdio_tasklet);
}
static inline void qdio_mark_tiq(qdio_q_t *q)
{
unsigned long flags;
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"mark iq");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
spin_lock_irqsave(&ttiq_list_lock,flags);
if (unlikely(atomic_read(&q->is_in_shutdown))) goto out_unlock;
if (q->is_input_q) {
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(qdio_q_t *q)
{
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"mark q");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
if (unlikely(atomic_read(&q->is_in_shutdown))) return;
tasklet_schedule(&q->tasklet);
}
static inline int qdio_stop_polling(qdio_q_t *q)
{
#ifdef QDIO_USE_PROCESSING_STATE
int gsf;
if (!atomic_swap(&q->polling,0)) return 1;
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"stoppoll");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
/* show the card that we are not polling anymore */
if (q->is_input_q) {
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) {
/* 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;
}
}
#endif /* QDIO_USE_PROCESSING_STATE */
return 1;
}
/* 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(qdio_q_t *q)
{
unsigned long flags;
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"unmark q");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
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 volatile unsigned long tiqdio_clear_global_summary(void)
{
unsigned long time;
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT5(0,trace,"clrglobl");
#endif /* QDIO_DBF_LIKE_HELL */
#ifdef QDIO_32_BIT
asm volatile (
"lhi 1,3 \n\t"
".insn rre,0xb2650000,2,0 \n\t"
"lr %0,3 \n\t"
: "=d" (time) : : "cc", "1", "2", "3"
);
#else /* QDIO_32_BIT */
asm volatile (
"lghi 1,3 \n\t"
".insn rre,0xb2650000,2,0 \n\t"
"lgr %0,3 \n\t"
: "=d" (time) : : "cc", "1", "2", "3"
);
#endif /* QDIO_32_BIT */
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_HEX5(0,trace,&time,sizeof(unsigned long));
#endif /* QDIO_DBF_LIKE_HELL */
return time;
}
/************************* OUTBOUND ROUTINES *******************************/
static inline void qdio_translate_buffer_back(qdio_q_t *q,int bufno)
{
if (unlikely(!q->is_0copy_sbals_q))
memcpy(q->qdio_buffers[bufno],
(void*)q->sbal[bufno],SBAL_SIZE);
}
static inline int qdio_get_outbound_buffer_frontier(qdio_q_t *q)
{
int f,f_mod_no;
volatile char *slsb;
int first_not_to_check;
char dbf_text[15];
char slsbyte;
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"getobfro");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
slsb=&q->slsb.acc.val[0];
f_mod_no=f=q->first_to_check;
/* f point 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;
slsbyte=slsb[f_mod_no];
/* the card has not fetched the output yet */
if (slsbyte==SLSB_CU_OUTPUT_PRIMED) {
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT5(0,trace,"outpprim");
#endif /* QDIO_DBF_LIKE_HELL */
goto out;
}
/* the card got it */
if (slsbyte==SLSB_P_OUTPUT_EMPTY) {
atomic_dec(&q->number_of_buffers_used);
f++;
f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT5(0,trace,"outpempt");
#endif /* QDIO_DBF_LIKE_HELL */
goto check_next;
}
if (slsbyte==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);
qdio_translate_buffer_back(q,f_mod_no);
/* 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;
goto out;
}
/* no new buffers */
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT5(0,trace,"outpni");
#endif /* QDIO_DBF_LIKE_HELL */
goto out;
out:
return (q->first_to_check=f_mod_no);
}
/* all buffers are processed */
static inline int qdio_is_outbound_q_done(qdio_q_t *q)
{
int no_used;
#ifdef QDIO_DBF_LIKE_HELL
char dbf_text[15];
#endif /* QDIO_DBF_LIKE_HELL */
no_used=atomic_read(&q->number_of_buffers_used);
#ifdef QDIO_DBF_LIKE_HELL
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 /* QDIO_DBF_LIKE_HELL */
return (no_used==0);
}
static inline int qdio_has_outbound_q_moved(qdio_q_t *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);
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"oqhasmvd");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
return 1;
} else {
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"oqhsntmv");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
return 0;
}
}
static inline void qdio_kick_outbound_q(qdio_q_t *q)
{
int result;
char dbf_text[15];
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"kickoutq");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
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.
* Every successful SIGA instruction will decrease the counter.
* 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 */
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);
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");
sprintf(dbf_text,"%4x%2x%2x",q->irq,q->q_no,
atomic_read(&q->busy_siga_counter));
QDIO_DBF_TEXT3(0,trace,dbf_text);
/* 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;
}
}
static inline void qdio_kick_outbound_handler(qdio_q_t *q)
{
#ifdef QDIO_DBF_LIKE_HELL
char dbf_text[15];
#endif /* QDIO_DBF_LIKE_HELL */
int start=q->first_element_to_kick;
/* last_move_ftc was just updated */
int real_end=GET_SAVED_FRONTIER(q);
int end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&
(QDIO_MAX_BUFFERS_PER_Q-1);
int count=(end+QDIO_MAX_BUFFERS_PER_Q+1-start)&
(QDIO_MAX_BUFFERS_PER_Q-1);
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"kickouth");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
#ifdef QDIO_DBF_LIKE_HELL
sprintf(dbf_text,"s=%2xc=%2x",start,count);
QDIO_DBF_TEXT4(0,trace,dbf_text);
#endif /* QDIO_DBF_LIKE_HELL */
if (q->state==QDIO_IRQ_STATE_ACTIVE)
q->handler(q->irq,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(qdio_q_t *q)
{
int siga_attempts;
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"qoutproc");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
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);
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"busy,agn");
#endif /* QDIO_DBF_LIKE_HELL */
}
return;
}
#ifdef QDIO_PERFORMANCE_STATS
o_p_nc++;
#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--;
}
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.tl_runs++;
#endif /* QDIO_PERFORMANCE_STATS */
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(qdio_q_t *q)
{
__qdio_outbound_processing(q);
}
/************************* INBOUND ROUTINES *******************************/
static inline int qdio_get_inbound_buffer_frontier(qdio_q_t *q)
{
int f,f_mod_no;
volatile char *slsb;
char slsbyte;
int first_not_to_check;
char dbf_text[15];
#ifdef QDIO_USE_PROCESSING_STATE
int last_position=-1;
#endif /* QDIO_USE_PROCESSING_STATE */
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"getibfro");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
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;
slsbyte=slsb[f_mod_no];
/* CU_EMPTY means frontier is reached */
if (slsbyte==SLSB_CU_INPUT_EMPTY) {
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT5(0,trace,"inptempt");
#endif /* QDIO_DBF_LIKE_HELL */
goto out;
}
/* P_PRIMED means set slsb to P_PROCESSING and move on */
if (slsbyte==SLSB_P_INPUT_PRIMED) {
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT5(0,trace,"inptprim");
#endif /* QDIO_DBF_LIKE_HELL */
#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
SYNC_MEMORY;*/
f++;
atomic_dec(&q->number_of_buffers_used);
goto check_next;
}
if ( (slsbyte==SLSB_P_INPUT_NOT_INIT) ||
(slsbyte==SLSB_P_INPUT_PROCESSING) ) {
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT5(0,trace,"inpnipro");
#endif /* QDIO_DBF_LIKE_HELL */
goto out;
}
/* P_ERROR means frontier is reached, break and report error */
if (slsbyte==SLSB_P_INPUT_ERROR) {
sprintf(dbf_text,"inperr%2x",f_mod_no);
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(&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 */
goto out;
}
/* everything else means frontier not changed (HALTED or so) */
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 */
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
#endif /* QDIO_DBF_LIKE_HELL */
return q->first_to_check;
}
static inline int qdio_has_inbound_q_moved(qdio_q_t *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);
}
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"inhasmvd");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
return 1;
} else {
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"inhsntmv");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
return 0;
}
}
/* means, no more buffers to be filled */
static inline int iqdio_is_inbound_q_done(qdio_q_t *q)
{
int no_used;
#ifdef QDIO_DBF_LIKE_HELL
char dbf_text[15];
#endif /* QDIO_DBF_LIKE_HELL */
no_used=atomic_read(&q->number_of_buffers_used);
/* propagate the change from 82 to 80 through VM */
SYNC_MEMORY;
#ifdef QDIO_DBF_LIKE_HELL
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 /* QDIO_DBF_LIKE_HELL */
if (!no_used) {
return 1;
}
if (q->siga_sync) {
if (q->slsb.acc.val[q->first_to_check]==SLSB_P_INPUT_PRIMED) {
/* 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 of scheduling ourselves for the next
* time. */
tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
tiqdio_sched_tl();
} else {
/* 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 */
}
} else {
/* we'll check for more primed buffers
* in qeth_stop_polling */
}
return 0;
}
static inline int qdio_is_inbound_q_done(qdio_q_t *q)
{
int no_used;
#ifdef QDIO_DBF_LIKE_HELL
char dbf_text[15];
#endif /* QDIO_DBF_LIKE_HELL */
no_used=atomic_read(&q->number_of_buffers_used);
/* we need that one for synchronization with the OSA/FCP card, as it
* does a kind of PCI avoidance */
SYNC_MEMORY;
if (!no_used) {
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"inqisdnA");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
QDIO_DBF_TEXT4(0,trace,dbf_text);
#endif /* QDIO_DBF_LIKE_HELL */
return 1;
}
if (q->slsb.acc.val[q->first_to_check]==SLSB_P_INPUT_PRIMED) {
/* we got something to do */
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"inqisntA");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
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 QDIO_DBF_LIKE_HELL
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 /* QDIO_DBF_LIKE_HELL */
return 1;
} else {
#ifdef QDIO_DBF_LIKE_HELL
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 /* QDIO_DBF_LIKE_HELL */
return 0;
}
}
static inline void qdio_kick_inbound_handler(qdio_q_t *q)
{
int count=0;
int start,end,real_end,i;
#ifdef QDIO_DBF_LIKE_HELL
char dbf_text[15];
QDIO_DBF_TEXT4(0,trace,"kickinh");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
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;
while (1) {
count++;
qdio_translate_buffer_back(q,i);
if (i==end) break;
i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
}
#ifdef QDIO_DBF_LIKE_HELL
sprintf(dbf_text,"s=%2xc=%2x",start,count);
QDIO_DBF_TEXT4(0,trace,dbf_text);
#endif /* QDIO_DBF_LIKE_HELL */
if (likely(q->state==QDIO_IRQ_STATE_ACTIVE))
q->handler(q->irq,
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(qdio_q_t *q,
int spare_ind_was_set)
{
qdio_irq_t *irq_ptr;
qdio_q_t *oq;
int i;
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"iqinproc");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
/* 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) ) {
/* 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 for outbound-int-capable thinint-capable
* queues */
if (q->hydra_gives_outbound_pcis) {
irq_ptr=(qdio_irq_t*)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)) {
qdio_kick_inbound_handler(q);
if (iqdio_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(qdio_q_t *q)
{
__tiqdio_inbound_processing(q,atomic_read(&spare_indicator_usecount));
}
static inline void __qdio_inbound_processing(qdio_q_t *q)
{
int q_laps=0;
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"qinproc");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* QDIO_DBF_LIKE_HELL */
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);
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"busy,agn");
#endif /* QDIO_DBF_LIKE_HELL */
}
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)) /* means poll time is
not yet over */
qdio_mark_q(q);
}
qdio_release_q(q);
}
static void qdio_inbound_processing(qdio_q_t *q)
{
__qdio_inbound_processing(q);
}
/************************* MAIN ROUTINES *******************************/
static inline void tiqdio_inbound_checks(void)
{
qdio_q_t *q;
int spare_ind_was_set=0;
#ifdef QDIO_USE_PROCESSING_STATE
int q_laps=0;
#endif /* QDIO_USE_PROCESSING_STATE */
#ifdef QDIO_DBF_LIKE_HELL
char dbf_text[15];
QDIO_DBF_TEXT4(0,trace,"iqdinbck");
#endif /* QDIO_DBF_LIKE_HELL */
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT5(0,trace,"iqlocsum");
#endif /* QDIO_DBF_LIKE_HELL */
#ifdef QDIO_USE_PROCESSING_STATE
again:
#endif /* QDIO_USE_PROCESSING_STATE */
/* when the spare indicator is used and set, save that and clear it */
if ( (atomic_read(&spare_indicator_usecount)) && (spare_indicator) ) {
spare_ind_was_set=1;
tiqdio_clear_summary_bit((__u32*)&spare_indicator);
}
q=(qdio_q_t*)tiq_list;
/* switch all active queues to processing state */
do {
if (!q) break;
__tiqdio_inbound_processing(q,spare_ind_was_set);
q=(qdio_q_t*)q->list_next;
} while (q!=(qdio_q_t*)tiq_list);
/* switch off all queues' processing state, see comments in
* qdio_get_inbound_buffer_frontier */
#ifdef QDIO_USE_PROCESSING_STATE
q=(qdio_q_t*)tiq_list;
do {
if (!q) {
tiqdio_sched_tl();
break;
}
/* under VM, we have not used the PROCESSING state, so no
* need to stop polling */
if (q->siga_sync) {
q=(qdio_q_t*)q->list_next;
continue;
}
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 */
/* sanity -- we'd get here without setting the
* dev st chg ind */
tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
tiqdio_sched_tl();
break;
}
if (!qdio_stop_polling(q)) {
q_laps++;
if (q_laps<QDIO_Q_LAPS) {
qdio_release_q(q);
goto again;
} else {
/* 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();
}
}
qdio_release_q(q);
q=(qdio_q_t*)q->list_next;
} while (q!=(qdio_q_t*)tiq_list);
#endif /* QDIO_USE_PROCESSING_STATE */
}
static void tiqdio_tl(unsigned long data)
{
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"tiqdio_tl");
#endif /* QDIO_DBF_LIKE_HELL */
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.tl_runs++;
#endif /* QDIO_PERFORMANCE_STATS */
tiqdio_inbound_checks();
}
/********************* GENERAL HELPER_ROUTINES ***********************/
static qdio_irq_t *qdio_get_irq_ptr(int irq)
{
qdio_irq_t *irq_ptr;
int bucket=irq&(QDIO_IRQ_BUCKETS-1);
read_lock(&irq_list_lock[bucket]);
irq_ptr=first_irq[bucket];
while (irq_ptr) {
if (irq_ptr->irq==irq) break;
irq_ptr=irq_ptr->next;
}
read_unlock(&irq_list_lock[bucket]);
return irq_ptr;
}
static qdio_irq_t *qdio_get_irq_ptr_wolock(int irq)
{
qdio_irq_t *irq_ptr=first_irq[irq&(QDIO_IRQ_BUCKETS-1)];
while (irq_ptr) {
if (irq_ptr->irq==irq) break;
irq_ptr=irq_ptr->next;
}
return irq_ptr;
}
/* irq_ptr->irq should be set already! */
static void qdio_insert_irq_ptr(qdio_irq_t *irq_ptr)
{
qdio_irq_t *i_p;
int irq,bucket;
if (!irq_ptr) return;
irq=irq_ptr->irq;
bucket=irq&(QDIO_IRQ_BUCKETS-1);
write_lock(&irq_list_lock[bucket]);
if (irq_ptr==qdio_get_irq_ptr_wolock(irq)) goto out;
if (!first_irq[bucket]) {
first_irq[bucket]=irq_ptr;
} else {
i_p=first_irq[bucket];
while (i_p->next)
i_p=i_p->next;
i_p->next=irq_ptr;
}
irq_ptr->next=NULL;
out:
write_unlock(&irq_list_lock[bucket]);
}
static void qdio_remove_irq_ptr(qdio_irq_t *irq_ptr)
{
qdio_irq_t *i_p;
int irq,bucket;
if (!irq_ptr) return;
irq=irq_ptr->irq;
bucket=irq&(QDIO_IRQ_BUCKETS-1);
write_lock(&irq_list_lock[bucket]);
if (!qdio_get_irq_ptr_wolock(irq)) goto out;
if (first_irq[irq&(QDIO_IRQ_BUCKETS-1)]==irq_ptr) {
first_irq[irq&(QDIO_IRQ_BUCKETS-1)]=irq_ptr->next;
} else {
for (i_p=first_irq[irq&(QDIO_IRQ_BUCKETS-1)];
i_p->next!=irq_ptr;i_p=i_p->next);
i_p->next=irq_ptr->next;
}
irq_ptr->next=NULL;
out:
write_unlock(&irq_list_lock[bucket]);
}
static void qdio_release_irq_memory(qdio_irq_t *irq_ptr)
{
int i,j;
int available;
for (i=0;i<QDIO_MAX_QUEUES_PER_IRQ;i++) {
if (!irq_ptr->input_qs[i]) goto next;
available=0;
if (!irq_ptr->input_qs[i]->is_0copy_sbals_q)
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) {
if (!available) {
if (irq_ptr->input_qs[i]->sbal[j])
kfree((void*)irq_ptr->
input_qs[i]->sbal[j]);
available=PAGE_SIZE;
}
available-=sizeof(sbal_t);
}
if (irq_ptr->input_qs[i]->slib)
kfree(irq_ptr->input_qs[i]->slib);
kfree(irq_ptr->input_qs[i]);
next:
if (!irq_ptr->output_qs[i]) continue;
available=0;
if (!irq_ptr->output_qs[i]->is_0copy_sbals_q)
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) {
if (!available) {
if (irq_ptr->output_qs[i]->sbal[j])
kfree((void*)irq_ptr->
output_qs[i]->sbal[j]);
available=PAGE_SIZE;
}
available-=sizeof(sbal_t);
}
if (irq_ptr->output_qs[i]->slib)
kfree(irq_ptr->output_qs[i]->slib);
kfree(irq_ptr->output_qs[i]);
}
kfree(irq_ptr->qdr);
kfree(irq_ptr);
}
static inline void qdio_wakeup(atomic_t *var,qdio_irq_t *irq_ptr)
{
wait_queue_head_t *wait_q;
#ifdef QDIO_DBF_LIKE_HELL
char dbf_text[20];
sprintf(dbf_text,"qwkp%4x",irq_ptr->irq);
QDIO_DBF_TEXT3(0,trace,dbf_text);
#endif /* QDIO_DBF_LIKE_HELL */
atomic_set(var,1);
if ((wait_q=&irq_ptr->wait_q))
wake_up(wait_q);
}
static int qdio_sleepon(atomic_t *var,int timeout,qdio_irq_t *irq_ptr)
{
__u64 stop;
int retval;
DECLARE_WAITQUEUE (current_wait_q,current);
#ifdef QDIO_DBF_LIKE_HELL
char dbf_text[20];
sprintf(dbf_text,"qslp%4x",irq_ptr->irq);
QDIO_DBF_TEXT3(0,trace,dbf_text);
#endif /* QDIO_DBF_LIKE_HELL */
add_wait_queue(&irq_ptr->wait_q,¤t_wait_q);
stop=(qdio_get_micros()>>10)+timeout;
for (;;) {
set_task_state(current,TASK_INTERRUPTIBLE);
if (atomic_read(var)) {
atomic_set(var,0);
retval=0;
goto out;
}
if (qdio_get_micros()>>10>stop) {
#ifdef QDIO_DBF_LIKE_HELL
sprintf(dbf_text,"%xtime",irq_ptr->irq);
QDIO_DBF_TEXT3(0,trace,dbf_text);
#endif /* QDIO_DBF_LIKE_HELL */
retval=-ETIME;
goto out;
}
schedule_timeout(((stop-(qdio_get_micros()>>10))>>10)*HZ);
}
out:
set_task_state(current,TASK_RUNNING);
remove_wait_queue(&irq_ptr->wait_q,¤t_wait_q);
return retval;
}
static void qdio_set_impl_params(qdio_irq_t *irq_ptr,
unsigned int qib_param_field_format,
/* pointer to 128 bytes or NULL, if no param field */
unsigned char *qib_param_field,
unsigned int no_input_qs,
unsigned int no_output_qs,
/* pointer to no_queues*128 words of data or NULL */
unsigned long *input_slib_elements,
unsigned long *output_slib_elements)
{
int i,j;
if (!irq_ptr) return;
irq_ptr->qib.pfmt=qib_param_field_format;
if (qib_param_field)
memcpy(irq_ptr->qib.parm,qib_param_field,
QDIO_MAX_BUFFERS_PER_Q);
if (input_slib_elements)
for (i=0;i<no_input_qs;i++) {
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
irq_ptr->input_qs[i]->slib->slibe[j].parms=
input_slib_elements[
i*QDIO_MAX_BUFFERS_PER_Q+j];
}
if (output_slib_elements)
for (i=0;i<no_output_qs;i++) {
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
irq_ptr->output_qs[i]->slib->slibe[j].parms=
output_slib_elements[
i*QDIO_MAX_BUFFERS_PER_Q+j];
}
}
static int qdio_alloc_qs(qdio_irq_t *irq_ptr,int no_input_qs,int no_output_qs,
qdio_handler_t *input_handler,
qdio_handler_t *output_handler,
unsigned long int_parm,int q_format,
unsigned long flags,
void **inbound_sbals_array,
void **outbound_sbals_array)
{
qdio_q_t *q;
int i,j,result=0;
char dbf_text[20]; /* see qdio_initialize */
void *ptr;
int available;
for (i=0;i<no_input_qs;i++) {
q=kmalloc(sizeof(qdio_q_t),GFP_KERNEL);
if (!q) {
QDIO_PRINT_ERR("kmalloc of q failed!\n");
goto out;
}
memset(q,0,sizeof(qdio_q_t));
sprintf(dbf_text,"in-q%4x",i);
QDIO_DBF_TEXT0(0,setup,dbf_text);
QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
if (!q->slib) {
QDIO_PRINT_ERR("kmalloc of slib failed!\n");
goto out;
}
memset(q->slib,0,PAGE_SIZE);
q->sl=(sl_t*)(((char*)q->slib)+PAGE_SIZE/2);
available=0;
if (flags&QDIO_INBOUND_0COPY_SBALS) {
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) {
q->sbal[j]=*(inbound_sbals_array++);
}
} else for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) {
if (!available) {
q->sbal[j]=kmalloc(PAGE_SIZE,GFP_KERNEL);
if (!q->sbal[j]) {
goto out;
}
available=PAGE_SIZE;
memset((void*)q->sbal[j],0,PAGE_SIZE);
} else {
q->sbal[j]=(volatile sbal_t *)
(((char*)q->sbal[j-1])+sizeof(sbal_t));
}
available-=sizeof(sbal_t);
}
q->queue_type=q_format;
q->int_parm=int_parm;
irq_ptr->input_qs[i]=q;
q->irq=irq_ptr->irq;
q->irq_ptr=irq_ptr;
q->mask=1<<(31-i);
q->q_no=i;
q->is_input_q=1;
q->is_0copy_sbals_q=flags&QDIO_INBOUND_0COPY_SBALS;
q->first_to_check=0;
q->last_move_ftc=0;
q->handler=input_handler;
q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind;
q->tasklet.data=(unsigned long)q;
/* q->is_thinint_q isn't valid at this time, but
* irq_ptr->is_thinint_irq is */
q->tasklet.func=(void(*)(unsigned long))
((irq_ptr->is_thinint_irq)?&tiqdio_inbound_processing:
&qdio_inbound_processing);
/* actually this is not used for inbound queues. yet. */
atomic_set(&q->busy_siga_counter,0);
q->timing.busy_start=0;
/* for (j=0;j<QDIO_STATS_NUMBER;j++)
q->timing.last_transfer_times[j]=(qdio_get_micros()/
QDIO_STATS_NUMBER)*j;
q->timing.last_transfer_index=QDIO_STATS_NUMBER-1;
*/
/* fill in slib */
if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba=
QDIO_PFIX_GET_ADDR(q->slib);
q->slib->sla=QDIO_PFIX_GET_ADDR(q->sl);
q->slib->slsba=QDIO_PFIX_GET_ADDR((void *)&q->slsb.acc.val[0]);
/* fill in sl */
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
q->sl->element[j].sbal=
QDIO_PFIX_GET_ADDR((void *)q->sbal[j]);
QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
ptr=(void*)q->sl;
QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
ptr=(void*)&q->slsb;
QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
ptr=(void*)q->sbal[0];
QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
/* fill in slsb */
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) {
set_slsb(&q->slsb.acc.val[j],
SLSB_P_INPUT_NOT_INIT);
q->sbal[j]->element[1].sbalf.i1.key=
QDIO_STORAGE_ACC_KEY;
}
}
for (i=0;i<no_output_qs;i++) {
q=kmalloc(sizeof(qdio_q_t),GFP_KERNEL);
if (!q) {
goto out;
}
memset(q,0,sizeof(qdio_q_t));
sprintf(dbf_text,"outq%4x",i);
QDIO_DBF_TEXT0(0,setup,dbf_text);
QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
if (!q->slib) {
QDIO_PRINT_ERR("kmalloc of slib failed!\n");
goto out;
}
memset(q->slib,0,PAGE_SIZE);
q->sl=(sl_t*)(((char*)q->slib)+PAGE_SIZE/2);
available=0;
if (flags&QDIO_OUTBOUND_0COPY_SBALS) {
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) {
q->sbal[j]=*(outbound_sbals_array++);
}
} else for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) {
if (!available) {
q->sbal[j]=kmalloc(PAGE_SIZE,GFP_KERNEL);
if (!q->sbal[j]) {
goto out;
}
available=PAGE_SIZE;
memset((void*)q->sbal[j],0,PAGE_SIZE);
} else {
q->sbal[j]=(volatile sbal_t *)
(((char*)q->sbal[j-1])+sizeof(sbal_t));
}
available-=sizeof(sbal_t);
}
q->queue_type=q_format;
q->int_parm=int_parm;
irq_ptr->output_qs[i]=q;
q->is_input_q=0;
q->is_0copy_sbals_q=flags&QDIO_OUTBOUND_0COPY_SBALS;
q->irq=irq_ptr->irq;
q->irq_ptr=irq_ptr;
q->mask=1<<(31-i);
q->q_no=i;
q->first_to_check=0;
q->last_move_ftc=0;
q->handler=output_handler;
q->tasklet.data=(unsigned long)q;
q->tasklet.func=(void(*)(unsigned long))
&qdio_outbound_processing;
atomic_set(&q->busy_siga_counter,0);
q->timing.busy_start=0;
/* fill in slib */
if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba=
QDIO_PFIX_GET_ADDR(q->slib);
q->slib->sla=QDIO_PFIX_GET_ADDR(q->sl);
q->slib->slsba=QDIO_PFIX_GET_ADDR((void *)&q->slsb.acc.val[0]);
/* fill in sl */
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
q->sl->element[j].sbal=
QDIO_PFIX_GET_ADDR((void *)q->sbal[j]);
QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
ptr=(void*)q->sl;
QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
ptr=(void*)&q->slsb;
QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
ptr=(void*)q->sbal[0];
QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
/* fill in slsb */
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) {
set_slsb(&q->slsb.acc.val[j],
SLSB_P_OUTPUT_NOT_INIT);
q->sbal[j]->element[1].sbalf.i1.key=
QDIO_STORAGE_ACC_KEY;
}
}
result=1;
out:
return result;
}
static void qdio_fill_thresholds(qdio_irq_t *irq_ptr,
unsigned int no_input_qs,
unsigned int no_output_qs,
unsigned int min_input_threshold,
unsigned int max_input_threshold,
unsigned int min_output_threshold,
unsigned int max_output_threshold)
{
int i;
qdio_q_t *q;
for (i=0;i<no_input_qs;i++) {
q=irq_ptr->input_qs[i];
q->timing.threshold=max_input_threshold;
/* for (j=0;j<QDIO_STATS_CLASSES;j++) {
q->threshold_classes[j].threshold=
min_input_threshold+
(max_input_threshold-min_input_threshold)/
QDIO_STATS_CLASSES;
}
qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
}
for (i=0;i<no_output_qs;i++) {
q=irq_ptr->output_qs[i];
q->timing.threshold=max_output_threshold;
/* for (j=0;j<QDIO_STATS_CLASSES;j++) {
q->threshold_classes[j].threshold=
min_output_threshold+
(max_output_threshold-min_output_threshold)/
QDIO_STATS_CLASSES;
}
qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
}
}
static int tiqdio_thinint_handler(__u32 intparm)
{
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT4(0,trace,"thin_int");
#endif /* QDIO_DBF_LIKE_HELL */
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.thinints++;
perf_stats.start_time_inbound=NOW;
#endif /* QDIO_PERFORMANCE_STATS */
/* SVS only when needed:
* issue SVS to benefit from iqdio interrupt avoidance
* (SVS clears AISOI)*/
if (!omit_svs) {
tiqdio_clear_global_summary();
}
tiqdio_inbound_checks();
return 0;
}
static void qdio_set_state(qdio_irq_t *irq_ptr,int state)
{
int i;
char dbf_text[15];
QDIO_DBF_TEXT5(0,trace,"newstate");
sprintf(dbf_text,"%4x%4x",irq_ptr->irq,state);
QDIO_DBF_TEXT5(0,trace,dbf_text);
irq_ptr->state=state;
for (i=0;i<irq_ptr->no_input_qs;i++)
irq_ptr->input_qs[i]->state=state;
for (i=0;i<irq_ptr->no_output_qs;i++)
irq_ptr->output_qs[i]->state=state;
mb();
}
static void qdio_handler(int irq,devstat_t *devstat,struct pt_regs *p)
{
qdio_irq_t *irq_ptr;
qdio_q_t *q;
int i;
int cstat,dstat;
int rqparam;
char dbf_text[15]="qintXXXX";
cstat = devstat->cstat;
dstat = devstat->dstat;
rqparam=devstat->intparm;
*((int*)(&dbf_text[4]))=irq;
QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
if (!rqparam) {
QDIO_PRINT_STUPID("got unsolicited interrupt in qdio " \
"handler, irq 0x%x\n",irq);
return;
}
irq_ptr=qdio_get_irq_ptr(irq);
if (!irq_ptr) {
sprintf(dbf_text,"uint%4x",irq);
QDIO_DBF_TEXT2(1,trace,dbf_text);
QDIO_PRINT_ERR("received interrupt on unused irq 0x%04x!\n",
irq);
return;
}
if (devstat->flag&DEVSTAT_FLAG_SENSE_AVAIL) {
sprintf(dbf_text,"sens%4x",irq);
QDIO_DBF_TEXT2(1,trace,dbf_text);
QDIO_DBF_HEX0(0,sense,&devstat->ii.irb,QDIO_DBF_SENSE_LEN);
QDIO_PRINT_WARN("sense data available on qdio channel.\n");
HEXDUMP16(WARN,"irb: ",&devstat->ii.irb);
HEXDUMP16(WARN,"sense data: ",&devstat->ii.sense.data[0]);
}
irq_ptr->io_result_cstat=ioinfo[irq]->devstat.cstat;
irq_ptr->io_result_dstat=ioinfo[irq]->devstat.dstat;
irq_ptr->io_result_flags=ioinfo[irq]->devstat.flag;
if ( (rqparam==QDIO_DOING_ACTIVATE) &&
(cstat & SCHN_STAT_PCI) ) {
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.pcis++;
perf_stats.start_time_inbound=NOW;
#endif /* QDIO_PERFORMANCE_STATS */
for (i=0;i<irq_ptr->no_input_qs;i++) {
q=irq_ptr->input_qs[i];
if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
qdio_mark_q(q);
else {
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.tl_runs--;
#endif /* QDIO_PERFORMANCE_STATS */
__qdio_inbound_processing(q);
}
}
if (irq_ptr->hydra_gives_outbound_pcis) {
for (i=0;i<irq_ptr->no_output_qs;i++) {
q=irq_ptr->output_qs[i];
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.tl_runs--;
#endif /* QDIO_PERFORMANCE_STATS */
if (!qdio_is_outbound_q_done(q)) {
if (!irq_ptr->sync_done_on_outb_pcis) {
SYNC_MEMORY;
}
__qdio_outbound_processing(q);
}
}
}
return;
}
if ( (rqparam==QDIO_DOING_ACTIVATE) &&
(!cstat) &&
(!dstat) ) {
rqparam=QDIO_DOING_CLEANUP;
}
if ( (rqparam==QDIO_DOING_ESTABLISH) &&
( (cstat) ||
(dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) ) ) {
sprintf(dbf_text,"ick1%4x",irq);
QDIO_DBF_TEXT2(1,trace,dbf_text);
QDIO_DBF_HEX2(0,trace,&rqparam,sizeof(int));
QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
QDIO_PRINT_ERR("received check condition on establish " \
"queues on irq 0x%x (cs=x%x, ds=x%x).\n",
irq,cstat,dstat);
qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
return;
}
if ( ( (rqparam==QDIO_DOING_ACTIVATE) &&
(dstat==(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) ) ||
( (rqparam==QDIO_DOING_CLEANUP) || (!rqparam) ) ) {
qdio_wakeup(&irq_ptr->interrupt_has_been_cleaned,irq_ptr);
return;
}
if ( (rqparam==QDIO_DOING_ACTIVATE) &&
( (cstat & ~SCHN_STAT_PCI) ||
(dstat) ) ) {
sprintf(dbf_text,"ick2%4x",irq);
QDIO_DBF_TEXT2(1,trace,dbf_text);
QDIO_DBF_HEX2(0,trace,&rqparam,sizeof(int));
QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
QDIO_PRINT_ERR("received check condition on activate " \
"queues on irq 0x%x (cs=x%x, ds=x%x).\n",
irq,cstat,dstat);
if (irq_ptr->no_input_qs) {
q=irq_ptr->input_qs[0];
} else if (irq_ptr->no_output_qs) {
q=irq_ptr->output_qs[0];
} else {
QDIO_PRINT_ERR("oops... no queue registered on irq " \
"0x%x!?\n",irq);
goto omit_handler_call;
}
q->handler(q->irq,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
QDIO_STATUS_LOOK_FOR_ERROR,
0,0,0,-1,-1,q->int_parm);
omit_handler_call:
qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
return;
}
qdio_wakeup(&irq_ptr->interrupt_has_arrived,irq_ptr);
}
/* this is for mp3 */
int qdio_synchronize(int irq,unsigned int flags,
unsigned int queue_number)
{
unsigned int gpr2,gpr3;
int cc;
qdio_q_t *q;
qdio_irq_t *irq_ptr;
char dbf_text[15]="SyncXXXX";
void *ptr;
*((int*)(&dbf_text[4]))=irq;
QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
*((int*)(&dbf_text[0]))=flags;
*((int*)(&dbf_text[4]))=queue_number;
QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
irq_ptr=qdio_get_irq_ptr(irq);
if (!irq_ptr) return -ENODEV;
if (flags&QDIO_FLAG_SYNC_INPUT) {
q=irq_ptr->input_qs[queue_number];
if (!q) return -EINVAL;
gpr2=0;
gpr3=q->mask;
} else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
q=irq_ptr->output_qs[queue_number];
if (!q) return -EINVAL;
gpr2=q->mask;
gpr3=0;
} else return -EINVAL;
#ifdef QDIO_32_BIT
asm volatile (
"lhi 0,2 \n\t"
"lr 1,%1 \n\t"
"lr 2,%2 \n\t"
"lr 3,%3 \n\t"
"siga 0 \n\t"
"ipm %0 \n\t"
"srl %0,28 \n\t"
: "=d" (cc)
: "d" (0x10000|q->irq), "d" (gpr2), "d" (gpr3)
: "cc", "0", "1", "2", "3"
);
#else /* QDIO_32_BIT */
asm volatile (
"lghi 0,2 \n\t"
"llgfr 1,%1 \n\t"
"llgfr 2,%2 \n\t"
"llgfr 3,%3 \n\t"
"siga 0 \n\t"
"ipm %0 \n\t"
"srl %0,28 \n\t"
: "=d" (cc)
: "d" (0x10000|q->irq), "d" (gpr2), "d" (gpr3)
: "cc", "0", "1", "2", "3"
);
#endif /* QDIO_32_BIT */
ptr=&cc;
if (cc) QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));
return cc;
}
unsigned char qdio_get_slsb_state(int irq,unsigned int flag,
unsigned int queue_number,
unsigned int qidx)
{
qdio_irq_t *irq_ptr;
qdio_q_t *q;
irq_ptr=qdio_get_irq_ptr(irq);
if (!irq_ptr) return SLSB_ERROR_DURING_LOOKUP;
if (flag&QDIO_FLAG_SYNC_INPUT) {
q=irq_ptr->input_qs[queue_number];
} else if (flag&QDIO_FLAG_SYNC_OUTPUT) {
q=irq_ptr->output_qs[queue_number];
} else return SLSB_ERROR_DURING_LOOKUP;
return q->slsb.acc.val[qidx&(QDIO_MAX_BUFFERS_PER_Q-1)];
}
static int qdio_chsc(qdio_chsc_area_t *chsc_area)
{
int cc;
#ifdef QDIO_32_BIT
asm volatile (
".insn rre,0xb25f0000,%1,0 \n\t"
"ipm %0 \n\t"
"srl %0,28 \n\t"
: "=d" (cc) : "d" (chsc_area) : "cc"
);
#else /* QDIO_32_BIT */
asm volatile (
".insn rre,0xb25f0000,%1,0 \n\t"
"ipm %0 \n\t"
"srl %0,28 \n\t"
: "=d" (cc) : "d" (chsc_area) : "cc"
);
#endif /* QDIO_32_BIT */
return cc;
}
static unsigned char qdio_check_siga_needs(int sch)
{
int resp_code,result;
unsigned long flags;
spin_lock_irqsave(&chsc_area_lock,flags);
memset(chsc_area,0,sizeof(qdio_chsc_area_t));
chsc_area->request_block.command_code1=0x0010; /* length */
chsc_area->request_block.command_code2=0x0024; /* op code */
chsc_area->request_block.first_sch=sch;
chsc_area->request_block.last_sch=sch;
result=qdio_chsc(chsc_area);
if (result) {
QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
"SIGAs for sch x%x.\n",
result,sch);
result=-1; /* all flags set */
goto out;
}
resp_code=chsc_area->request_block.operation_data_area.
store_qdio_data_response.response_code;
if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
QDIO_PRINT_WARN("response upon checking SIGA needs " \
"is 0x%x. Using all SIGAs for sch x%x.\n",
resp_code,sch);
result=-1; /* all flags set */
goto out;
}
if (
(!(chsc_area->request_block.operation_data_area.
store_qdio_data_response.flags&CHSC_FLAG_QDIO_CAPABILITY)) ||
(!(chsc_area->request_block.operation_data_area.
store_qdio_data_response.flags&CHSC_FLAG_VALIDITY)) ||
(chsc_area->request_block.operation_data_area.
store_qdio_data_response.sch!=sch)
) {
QDIO_PRINT_WARN("huh? problems checking out sch x%x... " \
"using all SIGAs.\n",sch);
result=CHSC_FLAG_SIGA_INPUT_NECESSARY |
CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
goto out;
}
result=chsc_area->request_block.operation_data_area.
store_qdio_data_response.qdioac;
out:
spin_unlock_irqrestore(&chsc_area_lock,flags);
return result;
}
static void qdio_check_for_machine_features(void)
{
int i,result;
unsigned long flags;
spin_lock_irqsave(&chsc_area_lock,flags);
memset(chsc_area,0,sizeof(qdio_chsc_area_t));
chsc_area->request_block.command_code1=0x0010;
chsc_area->request_block.command_code2=0x0010;
result=qdio_chsc(chsc_area);
if (result) {
QDIO_PRINT_WARN("CHSC returned cc %i. Won't use adapter " \
"interrupts for any QDIO device.\n",result);
result=0;
goto out;
}
i=chsc_area->request_block.operation_data_area.
store_qdio_data_response.response_code;
if (i!=1) {
QDIO_PRINT_WARN("Was not able to determine general " \
"characteristics of all QDIO devices " \
"aboard.\n");
result=0;
goto out;
}
/* 4: request block
* 2: general char
* 512: chsc char */
/* check for bit 67 */
if ( (*(((unsigned int*)(chsc_area))+4+2+2)&0x10000000)!=0x10000000) {
hydra_thinints=0;
} else {
hydra_thinints=1;
}
/* check for bit 56: if aif time delay disablement fac installed,
* omit svs even under lpar (good point by rick again) */
if ( (*(((unsigned int*)(chsc_area))+4+2+1)&0x00000080)!=0x00000080) {
omit_svs=1;
} else {
omit_svs=0;
}
out:
spin_unlock_irqrestore(&chsc_area_lock,flags);
}
/* the chsc_area is locked by the lock in qdio_activate */
static unsigned int tiqdio_check_chsc_availability(void) {
int result;
int i;
unsigned long flags;
spin_lock_irqsave(&chsc_area_lock,flags);
memset(chsc_area,0,sizeof(qdio_chsc_area_t));
chsc_area->request_block.command_code1=0x0010;
chsc_area->request_block.command_code2=0x0010;
result=qdio_chsc(chsc_area);
if (result) {
QDIO_PRINT_WARN("Was not able to determine " \
"available CHSCs, cc=%i.\n",
result);
result=-EIO;
goto exit;
}
result=0;
i=chsc_area->request_block.operation_data_area.
store_qdio_data_response.response_code;
if (i!=1) {
QDIO_PRINT_WARN("Was not able to determine " \
"available CHSCs.\n");
result=-EIO;
goto exit;
}
/* 4: request block
* 2: general char
* 512: chsc char */
/* check for bit 41 */
if ( (*(((unsigned int*)(chsc_area))+4+2+1)&0x00400000)!=0x00400000) {
QDIO_PRINT_WARN("Adapter interruption facility not " \
"installed.\n");
result=-ENOENT;
goto exit;
}
/* check for bits 107 and 108 */
if ( (*(((unsigned int*)(chsc_area))+4+512+3)&0x00180000)!=
0x00180000 ) {
QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
"not available.\n");
result=-ENOENT;
goto exit;
}
exit:
spin_unlock_irqrestore(&chsc_area_lock,flags);
return result;
}
/* the chsc_area is locked by the lock in qdio_activate */
static unsigned int tiqdio_set_subchannel_ind(qdio_irq_t *irq_ptr,
int reset_to_zero)
{
unsigned long real_addr_local_summary_bit;
unsigned long real_addr_dev_st_chg_ind;
void *ptr;
unsigned long flags;
char dbf_text[15];
unsigned int resp_code;
int result;
if (!irq_ptr->is_thinint_irq) return -ENODEV;
if (reset_to_zero) {
real_addr_local_summary_bit=0;
real_addr_dev_st_chg_ind=0;
} else {
real_addr_local_summary_bit=
virt_to_phys((volatile void *)indicators);
real_addr_dev_st_chg_ind=
virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind);
}
spin_lock_irqsave(&chsc_area_lock,flags);
memset(chsc_area,0,sizeof(qdio_chsc_area_t));
chsc_area->request_block.command_code1=0x0fe0;
chsc_area->request_block.command_code2=0x0021;
chsc_area->request_block.operation_code=0;
chsc_area->request_block.image_id=0;
chsc_area->request_block.operation_data_area.set_chsc.
summary_indicator_addr=real_addr_local_summary_bit;
chsc_area->request_block.operation_data_area.set_chsc.
subchannel_indicator_addr=real_addr_dev_st_chg_ind;
chsc_area->request_block.operation_data_area.set_chsc.
ks=QDIO_STORAGE_ACC_KEY;
chsc_area->request_block.operation_data_area.set_chsc.
kc=QDIO_STORAGE_ACC_KEY;
chsc_area->request_block.operation_data_area.set_chsc.
isc=TIQDIO_THININT_ISC;
chsc_area->request_block.operation_data_area.set_chsc.
subsystem_id=(1<<16)+irq_ptr->irq;
result=qdio_chsc(chsc_area);
if (result) {
QDIO_PRINT_WARN("could not set indicators on irq x%x, " \
"cc=%i.\n",irq_ptr->irq,result);
result=-EIO;
goto out;
}
resp_code=chsc_area->response_block.response_code;
if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
QDIO_PRINT_WARN("response upon setting indicators " \
"is 0x%x.\n",resp_code);
sprintf(dbf_text,"sidR%4x",resp_code);
QDIO_DBF_TEXT1(0,trace,dbf_text);
QDIO_DBF_TEXT1(0,setup,dbf_text);
ptr=&chsc_area->response_block;
QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN);
result=-EIO;
goto out;
}
QDIO_DBF_TEXT2(0,setup,"setscind");
QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit,
sizeof(unsigned long));
QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long));
result=0;
out:
spin_unlock_irqrestore(&chsc_area_lock,flags);
return result;
}
/* chsc_area would have to be locked if called from outside qdio_activate */
static unsigned int tiqdio_set_delay_target(qdio_irq_t *irq_ptr,
unsigned long delay_target)
{
unsigned int resp_code;
int result;
void *ptr;
unsigned long flags;
char dbf_text[15];
if (!irq_ptr->is_thinint_irq) return -ENODEV;
spin_lock_irqsave(&chsc_area_lock,flags);
memset(chsc_area,0,sizeof(qdio_chsc_area_t));
chsc_area->request_block.command_code1=0x0fe0;
chsc_area->request_block.command_code2=0x1027;
chsc_area->request_block.operation_data_area.set_chsc_fast.
delay_target=delay_target<<16;
result=qdio_chsc(chsc_area);
if (result) {
QDIO_PRINT_WARN("could not set delay target on irq x%x, " \
"cc=%i. Continuing.\n",irq_ptr->irq,result);
result=-EIO;
goto out;
}
resp_code=chsc_area->response_block.response_code;
if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
QDIO_PRINT_WARN("response upon setting delay target " \
"is 0x%x. Continuing.\n",resp_code);
sprintf(dbf_text,"sdtR%4x",resp_code);
QDIO_DBF_TEXT1(0,trace,dbf_text);
QDIO_DBF_TEXT1(0,setup,dbf_text);
ptr=&chsc_area->response_block;
QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN);
}
QDIO_DBF_TEXT2(0,trace,"delytrgt");
QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long));
result=0;
out:
spin_unlock_irqrestore(&chsc_area_lock,flags);
return result;
}
int qdio_cleanup(int irq,int how)
{
qdio_irq_t *irq_ptr;
int i,result;
int do_an_irqrestore=0;
unsigned long flags;
int timeout;
char dbf_text[15];
result=0;
sprintf(dbf_text,"qcln%4x",irq);
QDIO_DBF_TEXT1(0,trace,dbf_text);
QDIO_DBF_TEXT0(0,setup,dbf_text);
irq_ptr=qdio_get_irq_ptr(irq);
if (!irq_ptr) return -ENODEV;
down(&irq_ptr->setting_up_lock);
/* mark all qs as uninteresting */
for (i=0;i<irq_ptr->no_input_qs;i++) {
atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1);
}
for (i=0;i<irq_ptr->no_output_qs;i++) {
atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1);
}
tasklet_kill(&tiqdio_tasklet);
for (i=0;i<irq_ptr->no_input_qs;i++) {
qdio_unmark_q(irq_ptr->input_qs[i]);
tasklet_kill(&irq_ptr->input_qs[i]->tasklet);
if (qdio_wait_for_no_use_count(&irq_ptr->input_qs[i]->
use_count))
result=-EINPROGRESS;
}
for (i=0;i<irq_ptr->no_output_qs;i++) {
tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
if (qdio_wait_for_no_use_count(&irq_ptr->output_qs[i]->
use_count))
result=-EINPROGRESS;
}
atomic_set(&irq_ptr->interrupt_has_been_cleaned,0);
/* cleanup subchannel */
s390irq_spin_lock_irqsave(irq,flags);
if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
clear_IO(irq_ptr->irq,QDIO_DOING_CLEANUP,0);
timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
} else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
halt_IO(irq_ptr->irq,QDIO_DOING_CLEANUP,0);
timeout=QDIO_CLEANUP_HALT_TIMEOUT;
} else { /* default behaviour */
halt_IO(irq_ptr->irq,QDIO_DOING_CLEANUP,0);
timeout=QDIO_CLEANUP_HALT_TIMEOUT;
}
s390irq_spin_unlock_irqrestore(irq,flags);
if (qdio_sleepon(&irq_ptr->interrupt_has_been_cleaned,
timeout,irq_ptr)==-ETIME) {
s390irq_spin_lock_irqsave(irq,flags);
QDIO_PRINT_INFO("Did not get interrupt on %s_IO, " \
"irq=0x%x.\n",
(how==QDIO_FLAG_CLEANUP_USING_CLEAR)?
"clear":"halt",irq);
do_an_irqrestore=1;
}
if (irq_ptr->is_thinint_irq) {
qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind);
tiqdio_set_subchannel_ind(irq_ptr,1); /* reset adapter
interrupt indicators */
}
/* exchange int handlers, if necessary */
if ((void*)ioinfo[irq]->irq_desc.handler
==(void*)qdio_handler) {
ioinfo[irq]->irq_desc.handler=
irq_ptr->original_int_handler;
/* irq_ptr->original_int_handler=NULL; */
}
qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);
if (do_an_irqrestore)
s390irq_spin_unlock_irqrestore(irq,flags);
up(&irq_ptr->setting_up_lock);
qdio_remove_irq_ptr(irq_ptr);
qdio_release_irq_memory(irq_ptr);
QDIO_DBF_TEXT3(0,setup,"MOD_DEC_");
MOD_DEC_USE_COUNT;
return result;
}
unsigned long qdio_get_characteristics(int irq)
{
qdio_irq_t *irq_ptr;
int result=0;
irq_ptr=qdio_get_irq_ptr(irq);
if (!irq_ptr) return -ENODEV;
if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE) {
return -EBUSY;
}
if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
result|=QDIO_STATE_INACTIVE;
} else if (irq_ptr->state==QDIO_IRQ_STATE_ESTABLISHED) {
result|=QDIO_STATE_ESTABLISHED;
} else if (irq_ptr->state==QDIO_IRQ_STATE_ACTIVE) {
result|=QDIO_STATE_ACTIVE;
} else if (irq_ptr->state==QDIO_IRQ_STATE_STOPPED) {
result|=QDIO_STATE_STOPPED;
}
if (irq_ptr->hydra_gives_outbound_pcis)
result|=QDIO_STATE_MUST_USE_OUTB_PCI;
return result;
}
int qdio_initialize(qdio_initialize_t *init_data)
{
int i,ciw_cnt;
unsigned long saveflags;
qdio_irq_t *irq_ptr=NULL;
int result,result2;
int found;
unsigned long flags;
char dbf_text[20]; /* if a printf printed out more than 8 chars */
down(&init_sema);
sprintf(dbf_text,"qini%4x",init_data->irq);
QDIO_DBF_TEXT0(0,setup,dbf_text);
QDIO_DBF_TEXT0(0,trace,dbf_text);
sprintf(dbf_text,"qfmt:%x",init_data->q_format);
QDIO_DBF_TEXT0(0,setup,dbf_text);
QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8);
sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format);
QDIO_DBF_TEXT0(0,setup,dbf_text);
QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*));
QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*));
QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*));
sprintf(dbf_text,"miit%4x",init_data->min_input_threshold);
QDIO_DBF_TEXT0(0,setup,dbf_text);
sprintf(dbf_text,"mait%4x",init_data->min_input_threshold);
QDIO_DBF_TEXT0(0,setup,dbf_text);
sprintf(dbf_text,"miot%4x",init_data->max_output_threshold);
QDIO_DBF_TEXT0(0,setup,dbf_text);
sprintf(dbf_text,"maot%4x",init_data->max_output_threshold);
QDIO_DBF_TEXT0(0,setup,dbf_text);
sprintf(dbf_text,"niq:%4x",init_data->no_input_qs);
QDIO_DBF_TEXT0(0,setup,dbf_text);
sprintf(dbf_text,"noq:%4x",init_data->no_output_qs);
QDIO_DBF_TEXT0(0,setup,dbf_text);
QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*));
QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*));
QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long));
QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long));
QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*));
QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,sizeof(void*));
flags=init_data->flags;
/* sanity checks */
if (qdio_get_irq_ptr(init_data->irq)) {
result=-EBUSY;
goto out;
}
if (ioinfo[init_data->irq]==INVALID_STORAGE_AREA) {
result=-ENODEV;
goto out;
}
if (!ioinfo[init_data->irq]) {
QDIO_PRINT_WARN("ioinfo[%i] is NULL!\n",init_data->irq);
result=-ENODEV;
goto out;
}
#define DEVSTAT_FLAG_IRQ_QDIO ~0UL
if (!(ioinfo[init_data->irq]->devstat.flag&DEVSTAT_FLAG_IRQ_QDIO)) {
QDIO_PRINT_WARN("ioinfo[%i]->devstat.flag=0x%08x\n",
init_data->irq,
ioinfo[init_data->irq]->devstat.flag);
result=-ENODEV;
goto out;
}
if ( (init_data->no_input_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
(init_data->no_output_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
((init_data->no_input_qs) && (!init_data->input_handler)) ||
((init_data->no_output_qs) && (!init_data->output_handler)) ) {
result=-EINVAL;
goto out;
}
if ( (init_data->flags&QDIO_INBOUND_0COPY_SBALS)&&
(!init_data->input_sbal_addr_array) ) {
result=-EINVAL;
goto out;
}
if ( (init_data->flags&QDIO_OUTBOUND_0COPY_SBALS)&&
(!init_data->output_sbal_addr_array) ) {
result=-EINVAL;
goto out;
}
/* create irq */
irq_ptr=kmalloc(sizeof(qdio_irq_t),GFP_DMA);
QDIO_DBF_TEXT0(0,setup,"irq_ptr:");
QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));
if (!irq_ptr) {
QDIO_PRINT_ERR("kmalloc of irq_ptr failed!\n");
result=-ENOMEM;
goto out;
}
memset(irq_ptr,0,sizeof(qdio_irq_t)); /* wipes qib.ac,
required by ar7063 */
irq_ptr->qdr=kmalloc(sizeof(qdr_t),GFP_DMA);
if (!(irq_ptr->qdr)) {
kfree(irq_ptr);
QDIO_PRINT_ERR("kmalloc of irq_ptr->qdr failed!\n");
result=-ENOMEM;
goto out;
}
memset(irq_ptr->qdr,0,sizeof(qdr_t));
QDIO_DBF_TEXT0(0,setup,"qdr:");
QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*));
init_waitqueue_head(&irq_ptr->wait_q);
irq_ptr->int_parm=init_data->int_parm;
irq_ptr->irq=init_data->irq;
irq_ptr->no_input_qs=init_data->no_input_qs;
irq_ptr->no_output_qs=init_data->no_output_qs;
if (init_data->q_format==QDIO_IQDIO_QFMT) {
irq_ptr->is_iqdio_irq=1;
irq_ptr->is_thinint_irq=1;
} else {
irq_ptr->is_iqdio_irq=0;
irq_ptr->is_thinint_irq=hydra_thinints;
}
sprintf(dbf_text,"is_i_t%1x%1x",
irq_ptr->is_iqdio_irq,irq_ptr->is_thinint_irq);
QDIO_DBF_TEXT2(0,setup,dbf_text);
if (irq_ptr->is_thinint_irq) {
irq_ptr->dev_st_chg_ind=qdio_get_indicator();
QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*));
if (!irq_ptr->dev_st_chg_ind) {
QDIO_PRINT_WARN("no indicator location available " \
"for irq 0x%x\n",irq_ptr->irq);
qdio_release_irq_memory(irq_ptr);
result=-ENOBUFS;
goto out;
}
}
if (flags&QDIO_PFIX)
irq_ptr->other_flags |= QDIO_PFIX;
/* defaults */
irq_ptr->commands.eq=DEFAULT_ESTABLISH_QS_CMD;
irq_ptr->commands.count_eq=DEFAULT_ESTABLISH_QS_COUNT;
irq_ptr->commands.aq=DEFAULT_ACTIVATE_QS_CMD;
irq_ptr->commands.count_aq=DEFAULT_ACTIVATE_QS_COUNT;
if (!qdio_alloc_qs(irq_ptr,init_data->no_input_qs,
init_data->no_output_qs,
init_data->input_handler,
init_data->output_handler,init_data->int_parm,
init_data->q_format,init_data->flags,
init_data->input_sbal_addr_array,
init_data->output_sbal_addr_array)) {
qdio_release_irq_memory(irq_ptr);
result=-ENOMEM;
goto out;
}
qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);
sema_init(&irq_ptr->setting_up_lock,1);
MOD_INC_USE_COUNT;
QDIO_DBF_TEXT3(0,setup,"MOD_INC_");
down(&irq_ptr->setting_up_lock);
qdio_insert_irq_ptr(irq_ptr);
qdio_fill_thresholds(irq_ptr,init_data->no_input_qs,
init_data->no_output_qs,
init_data->min_input_threshold,
init_data->max_input_threshold,
init_data->min_output_threshold,
init_data->max_output_threshold);
/* fill in qdr */
irq_ptr->qdr->qfmt=init_data->q_format;
irq_ptr->qdr->iqdcnt=init_data->no_input_qs;
irq_ptr->qdr->oqdcnt=init_data->no_output_qs;
irq_ptr->qdr->iqdsz=sizeof(qdesfmt0_t)/4; /* size in words */
irq_ptr->qdr->oqdsz=sizeof(qdesfmt0_t)/4;
irq_ptr->qdr->qiba=QDIO_PFIX_GET_ADDR(&irq_ptr->qib);
irq_ptr->qdr->qkey=QDIO_STORAGE_ACC_KEY;
/* fill in qib */
irq_ptr->qib.qfmt=init_data->q_format;
if (init_data->no_input_qs) irq_ptr->qib.isliba=
QDIO_PFIX_GET_ADDR(irq_ptr->input_qs[0]->slib);
if (init_data->no_output_qs) irq_ptr->qib.osliba=(unsigned long)
QDIO_PFIX_GET_ADDR(irq_ptr->output_qs[0]->slib);
memcpy(irq_ptr->qib.ebcnam,init_data->adapter_name,8);
qdio_set_impl_params(irq_ptr,init_data->qib_param_field_format,
init_data->qib_param_field,
init_data->no_input_qs,
init_data->no_output_qs,
init_data->input_slib_elements,
init_data->output_slib_elements);
/* first input descriptors, then output descriptors */
for (i=0;i<init_data->no_input_qs;i++) {
irq_ptr->input_qs[i]->is_iqdio_q=
(init_data->q_format==QDIO_IQDIO_QFMT)?1:0;
irq_ptr->input_qs[i]->is_thinint_q=irq_ptr->is_thinint_irq;
irq_ptr->qdr->qdf0[i].sliba=
QDIO_PFIX_GET_ADDR(irq_ptr->input_qs[i]->slib);
irq_ptr->qdr->qdf0[i].sla=
QDIO_PFIX_GET_ADDR(irq_ptr->input_qs[i]->sl);
irq_ptr->qdr->qdf0[i].slsba=
QDIO_PFIX_GET_ADDR
((void *)&irq_ptr->input_qs[i]->slsb.acc.val[0]);
irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_ACC_KEY;
irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_ACC_KEY;
irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_ACC_KEY;
irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_ACC_KEY;
}
for (i=0;i<init_data->no_output_qs;i++) {
irq_ptr->output_qs[i]->is_iqdio_q=
(init_data->q_format==QDIO_IQDIO_QFMT)?1:0;
irq_ptr->output_qs[i]->is_thinint_q=irq_ptr->is_thinint_irq;
irq_ptr->qdr->qdf0[i+init_data->no_input_qs].sliba=
QDIO_PFIX_GET_ADDR(irq_ptr->output_qs[i]->slib);
irq_ptr->qdr->qdf0[i+init_data->no_input_qs].sla=
QDIO_PFIX_GET_ADDR(irq_ptr->output_qs[i]->sl);
irq_ptr->qdr->qdf0[i+init_data->no_input_qs].slsba=
QDIO_PFIX_GET_ADDR
((void *)&irq_ptr->output_qs[i]->slsb.acc.val[0]);
irq_ptr->qdr->qdf0[i+init_data->no_input_qs].akey=
QDIO_STORAGE_ACC_KEY;
irq_ptr->qdr->qdf0[i+init_data->no_input_qs].bkey=
QDIO_STORAGE_ACC_KEY;
irq_ptr->qdr->qdf0[i+init_data->no_input_qs].ckey=
QDIO_STORAGE_ACC_KEY;
irq_ptr->qdr->qdf0[i+init_data->no_input_qs].dkey=
QDIO_STORAGE_ACC_KEY;
}
/* qdr, qib, sls, slsbs, slibs, sbales filled. */
s390irq_spin_lock_irqsave(irq_ptr->irq,saveflags);
/* keep track of original int handler */
irq_ptr->original_int_handler=ioinfo[irq_ptr->irq]->irq_desc.handler;
/* insert qdio int handler */
ioinfo[irq_ptr->irq]->irq_desc.handler=(void*)qdio_handler;
s390irq_spin_unlock_irqrestore(irq_ptr->irq,saveflags);
#define TAKEOVER_CIW(x) irq_ptr->commands.x=ioinfo[irq_ptr->irq]->senseid.ciw[ciw_cnt].cmd; irq_ptr->commands.count_##x=ioinfo[irq_ptr->irq]->senseid.ciw[ciw_cnt].count
/* get qdio commands */
found=0;
for (ciw_cnt=0;ciw_cnt<MAX_CIWS;ciw_cnt++) {
switch (ioinfo[irq_ptr->irq]->senseid.ciw[ciw_cnt].ct) {
case CIW_TYPE_RCD: TAKEOVER_CIW(rcd); break;
case CIW_TYPE_SII: TAKEOVER_CIW(sii); break;
case CIW_TYPE_RNI: TAKEOVER_CIW(rni); break;
case CIW_TYPE_EQUEUE: TAKEOVER_CIW(eq); found++; break;
case CIW_TYPE_AQUEUE: TAKEOVER_CIW(aq); found++; break;
}
if ( (ciw_cnt>0) &&
(ioinfo[irq_ptr->irq]->senseid.ciw[ciw_cnt].ct==0) &&
(ioinfo[irq_ptr->irq]->senseid.ciw[ciw_cnt].cmd==0) &&
(ioinfo[irq_ptr->irq]->senseid.ciw[ciw_cnt].count) )
break;
}
if (found<2) {
QDIO_DBF_TEXT2(1,setup,"no ciws");
QDIO_PRINT_INFO("No CIWs found for QDIO commands. Trying to " \
"use defaults.\n");
}
/* the thinint CHSC stuff */
if (irq_ptr->is_thinint_irq) {
/* iqdio_enable_adapter_int_facility(irq_ptr);*/
if (tiqdio_check_chsc_availability()) {
QDIO_PRINT_ERR("Not all CHSCs supported. " \
"Continuing.\n");
}
result=tiqdio_set_subchannel_ind(irq_ptr,0);
if (result) {
up(&irq_ptr->setting_up_lock);
qdio_cleanup(irq_ptr->irq,
QDIO_FLAG_CLEANUP_USING_CLEAR);
goto out;
}
tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET);
}
/* establish q */
irq_ptr->ccw.cmd_code=irq_ptr->commands.eq;
irq_ptr->ccw.flags=CCW_FLAG_SLI;
irq_ptr->ccw.count=irq_ptr->commands.count_eq;
irq_ptr->ccw.cda=QDIO_GET_32BIT_ADDR(QDIO_PFIX_GET_ADDR(irq_ptr->qdr));
s390irq_spin_lock_irqsave(irq_ptr->irq,saveflags);
atomic_set(&irq_ptr->interrupt_has_arrived,0);
result=do_IO(irq_ptr->irq,&irq_ptr->ccw,QDIO_DOING_ESTABLISH,0,
((irq_ptr->other_flags&QDIO_PFIX)?DOIO_USE_DIAG98:0));
if (result) {
result2=do_IO(irq_ptr->irq,&irq_ptr->ccw,
QDIO_DOING_ESTABLISH,0,
((irq_ptr->other_flags&QDIO_PFIX)?
DOIO_USE_DIAG98:0));
sprintf(dbf_text,"eq:io%4x",result);
QDIO_DBF_TEXT2(1,setup,dbf_text);
if (result2) {
sprintf(dbf_text,"eq:io%4x",result);
QDIO_DBF_TEXT2(1,setup,dbf_text);
}
QDIO_PRINT_WARN("establish queues on irq %04x: do_IO " \
"returned %i, next try returned %i\n",
irq_ptr->irq,result,result2);
result=result2;
}
s390irq_spin_unlock_irqrestore(irq_ptr->irq,saveflags);
if (result) {
up(&irq_ptr->setting_up_lock);
qdio_cleanup(irq_ptr->irq,QDIO_FLAG_CLEANUP_USING_CLEAR);
goto out;
}
result=qdio_sleepon(&irq_ptr->interrupt_has_arrived,
QDIO_ESTABLISH_TIMEOUT,irq_ptr);
if (result) {
QDIO_PRINT_ERR("establish queues on irq %04x: timed out\n",
irq_ptr->irq);
QDIO_DBF_TEXT2(1,setup,"eq:timeo");
up(&irq_ptr->setting_up_lock);
qdio_cleanup(irq_ptr->irq,QDIO_FLAG_CLEANUP_USING_CLEAR);
goto out;
}
if (!(irq_ptr->io_result_dstat & DEV_STAT_DEV_END)) {
QDIO_DBF_TEXT2(1,setup,"eq:no de");
QDIO_DBF_HEX2(0,setup,&irq_ptr->io_result_dstat,
sizeof(irq_ptr->io_result_dstat));
QDIO_DBF_HEX2(0,setup,&irq_ptr->io_result_cstat,
sizeof(irq_ptr->io_result_cstat));
QDIO_DBF_HEX2(0,setup,&irq_ptr->io_result_flags,
sizeof(irq_ptr->io_result_flags));
QDIO_PRINT_ERR("establish queues on irq %04x: didn't get " \
"device end: dstat=%02x, cstat=%02x, " \
"flags=%02x\n",
irq_ptr->irq,irq_ptr->io_result_dstat,
irq_ptr->io_result_cstat,
irq_ptr->io_result_flags);
up(&irq_ptr->setting_up_lock);
qdio_cleanup(irq_ptr->irq,QDIO_FLAG_CLEANUP_USING_CLEAR);
result=-EIO;
goto out;
}
if (irq_ptr->io_result_dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) {
QDIO_DBF_TEXT2(1,setup,"eq:badio");
QDIO_DBF_HEX2(0,setup,&irq_ptr->io_result_dstat,
sizeof(irq_ptr->io_result_dstat));
QDIO_DBF_HEX2(0,setup,&irq_ptr->io_result_cstat,
sizeof(irq_ptr->io_result_cstat));
QDIO_DBF_HEX2(0,setup,&irq_ptr->io_result_flags,
sizeof(irq_ptr->io_result_flags));
QDIO_PRINT_ERR("establish queues on irq %04x: got " \
"the following devstat: dstat=%02x, " \
"cstat=%02x, flags=%02x\n",
irq_ptr->irq,irq_ptr->io_result_dstat,
irq_ptr->io_result_cstat,
irq_ptr->io_result_flags);
result=-EIO;
up(&irq_ptr->setting_up_lock);
goto out;
}
irq_ptr->qdioac=qdio_check_siga_needs(irq_ptr->irq);
sprintf(dbf_text,"qdioac%2x",irq_ptr->qdioac);
QDIO_DBF_TEXT2(0,setup,dbf_text);
/* if this gets set once, we're running under VM and can omit SVSes */
if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY) {
omit_svs=1;
}
sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac);
QDIO_DBF_TEXT2(0,setup,dbf_text);
if (init_data->flags&QDIO_USE_OUTBOUND_PCIS) {
irq_ptr->hydra_gives_outbound_pcis=
irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED;
} else {
irq_ptr->hydra_gives_outbound_pcis=0;
}
irq_ptr->sync_done_on_outb_pcis=
irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS;
for (i=0;i<init_data->no_input_qs;i++) {
irq_ptr->input_qs[i]->siga_sync=
irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
irq_ptr->input_qs[i]->siga_in=
irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
irq_ptr->input_qs[i]->siga_out=
irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
irq_ptr->input_qs[i]->siga_sync_done_on_thinints=
irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
irq_ptr->input_qs[i]->hydra_gives_outbound_pcis=
irq_ptr->hydra_gives_outbound_pcis;
irq_ptr->input_qs[i]->siga_sync_done_on_outb_tis=
( (irq_ptr->qdioac&
(CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
(CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS) );
}
for (i=0;i<init_data->no_output_qs;i++) {
irq_ptr->output_qs[i]->siga_sync=
irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
irq_ptr->output_qs[i]->siga_in=
irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
irq_ptr->output_qs[i]->siga_out=
irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
irq_ptr->output_qs[i]->siga_sync_done_on_thinints=
irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
irq_ptr->output_qs[i]->hydra_gives_outbound_pcis=
irq_ptr->hydra_gives_outbound_pcis;
irq_ptr->output_qs[i]->siga_sync_done_on_outb_tis=
( (irq_ptr->qdioac&
(CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
(CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS) );
}
if (init_data->qib_param_field)
memcpy(init_data->qib_param_field,irq_ptr->qib.parm,
QDIO_MAX_BUFFERS_PER_Q);
qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED);
if (irq_ptr) {
up(&irq_ptr->setting_up_lock);
}
out:
up(&init_sema);
return result;
}
int qdio_activate(int irq,int flags)
{
qdio_irq_t *irq_ptr;
int i,result=0,result2;
unsigned long saveflags;
char dbf_text[20]; /* see qdio_initialize */
irq_ptr=qdio_get_irq_ptr(irq);
if (!irq_ptr) return -ENODEV;
down(&irq_ptr->setting_up_lock);
if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
result=-EBUSY;
goto out;
}
sprintf(dbf_text,"qact%4x",irq);
QDIO_DBF_TEXT2(0,setup,dbf_text);
QDIO_DBF_TEXT2(0,trace,dbf_text);
/* activate q */
irq_ptr->ccw.cmd_code=irq_ptr->commands.aq;
irq_ptr->ccw.flags=CCW_FLAG_SLI;
irq_ptr->ccw.count=irq_ptr->commands.count_aq;
irq_ptr->ccw.cda=QDIO_GET_32BIT_ADDR(0); /* no QDIO_PFIX_GET_ADDR here,
not needed */
s390irq_spin_lock_irqsave(irq_ptr->irq,saveflags);
atomic_set(&irq_ptr->interrupt_has_arrived,0);
result=do_IO(irq_ptr->irq,&irq_ptr->ccw,QDIO_DOING_ACTIVATE,
0,DOIO_REPORT_ALL|DOIO_DENY_PREFETCH|
((irq_ptr->other_flags&QDIO_PFIX)?DOIO_USE_DIAG98:0));
if (result) {
result2=do_IO(irq_ptr->irq,&irq_ptr->ccw,
QDIO_DOING_ACTIVATE,0,DOIO_REPORT_ALL|
((irq_ptr->other_flags&QDIO_PFIX) ?
DOIO_USE_DIAG98:0));
sprintf(dbf_text,"aq:io%4x",result);
QDIO_DBF_TEXT2(1,setup,dbf_text);
if (result2) {
sprintf(dbf_text,"aq:io%4x",result);
QDIO_DBF_TEXT2(1,setup,dbf_text);
}
QDIO_PRINT_WARN("activate queues on irq %04x: do_IO " \
"returned %i, next try returned %i\n",
irq_ptr->irq,result,result2);
result=result2;
}
s390irq_spin_unlock_irqrestore(irq_ptr->irq,saveflags);
if (result) {
goto out;
}
if (!(flags&QDIO_FLAG_UNDER_INTERRUPT)) {
result=qdio_sleepon(&irq_ptr->interrupt_has_arrived,
QDIO_ACTIVATE_TIMEOUT,irq_ptr);
if (result!=-ETIME) {
QDIO_DBF_TEXT2(1,setup,"aq:badio");
QDIO_DBF_HEX2(0,setup,&irq_ptr->io_result_dstat,
sizeof(irq_ptr->io_result_dstat));
QDIO_DBF_HEX2(0,setup,&irq_ptr->io_result_cstat,
sizeof(irq_ptr->io_result_cstat));
QDIO_DBF_HEX2(0,setup,&irq_ptr->io_result_flags,
sizeof(irq_ptr->io_result_flags));
QDIO_PRINT_ERR("activate queues on irq %04x: got " \
"the following devstat: dstat=%02x, " \
"cstat=%02x, flags=%02x\n",
irq_ptr->irq,irq_ptr->io_result_dstat,
irq_ptr->io_result_cstat,
irq_ptr->io_result_flags);
result=-EIO;
goto out;
} else { /* result is -ETIME, but timeout is ok for us */
result=0;
}
} else result=0;
for (i=0;i<irq_ptr->no_input_qs;i++) {
if (irq_ptr->is_thinint_irq) {
/* that way we know, that, if we will
* get interrupted
* by tiqdio_inbound_processing,
* qdio_unmark_q will
* not be called */
qdio_reserve_q(irq_ptr->input_qs[i]);
qdio_mark_tiq(irq_ptr->input_qs[i]);
qdio_release_q(irq_ptr->input_qs[i]);
}
}
if (flags&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) {
for (i=0;i<irq_ptr->no_input_qs;i++) {
irq_ptr->input_qs[i]->is_input_q|=
QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT;
}
}
qdio_wait_nonbusy(QDIO_ACTIVATE_DELAY);
qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ACTIVE);
out:
up(&irq_ptr->setting_up_lock);
return result;
}
/* buffers filled forwards again to make Rick happy */
static inline void qdio_do_qdio_fill_input(qdio_q_t *q,unsigned int qidx,
unsigned int count,
qdio_buffer_t *buffers)
{
for (;;) {
if (!q->is_0copy_sbals_q) {
memcpy((void*)q->sbal[qidx],buffers,SBAL_SIZE);
q->qdio_buffers[qidx]=buffers;
buffers++;
}
set_slsb(&q->slsb.acc.val[qidx],SLSB_CU_INPUT_EMPTY);
count--;
if (!count) break;
qidx=(qidx+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
}
/* not necessary, as the queues are synced during the SIGA read
SYNC_MEMORY;*/
}
static inline void qdio_do_qdio_fill_output(qdio_q_t *q,unsigned int qidx,
unsigned int count,
qdio_buffer_t *buffers)
{
for (;;) {
if (!q->is_0copy_sbals_q) {
memcpy((void*)q->sbal[qidx],buffers,SBAL_SIZE);
q->qdio_buffers[qidx]=buffers;
buffers++;
}
set_slsb(&q->slsb.acc.val[qidx],SLSB_CU_OUTPUT_PRIMED);
count--;
if (!count) break;
qidx=(qidx+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
}
/* SIGA write will sync the queues
SYNC_MEMORY;*/
}
/* count must be 1 in iqdio */
int do_QDIO(int irq,unsigned int callflags,unsigned int queue_number,
unsigned int qidx,unsigned int count,qdio_buffer_t *buffers)
{
qdio_q_t *q;
qdio_irq_t *irq_ptr;
int result;
int used_elements;
#ifdef QDIO_DBF_LIKE_HELL
char dbf_text[20];
sprintf(dbf_text,"doQD%04x",irq);
QDIO_DBF_TEXT3(0,trace,dbf_text);
#endif /* QDIO_DBF_LIKE_HELL */
if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) ||
(count>QDIO_MAX_BUFFERS_PER_Q) ||
(queue_number>QDIO_MAX_QUEUES_PER_IRQ) )
return -EINVAL;
if (count==0) return 0;
irq_ptr=qdio_get_irq_ptr(irq);
if (!irq_ptr) return -ENODEV;
#ifdef QDIO_DBF_LIKE_HELL
if (callflags&QDIO_FLAG_SYNC_INPUT)
QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number],
sizeof(void*));
else
QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number],
sizeof(void*));
sprintf(dbf_text,"flag%04x",callflags);
QDIO_DBF_TEXT3(0,trace,dbf_text);
sprintf(dbf_text,"qi%02xct%02x",qidx,count);
QDIO_DBF_TEXT3(0,trace,dbf_text);
if ( ((callflags&QDIO_FLAG_SYNC_INPUT)&&
(!irq_ptr->input_qs[queue_number]->is_0copy_sbals_q)) ||
((callflags&QDIO_FLAG_SYNC_OUTPUT)&&
(!irq_ptr->output_qs[queue_number]->is_0copy_sbals_q)) )
QDIO_DBF_HEX5(0,sbal,buffers,256);
#endif /* QDIO_DBF_LIKE_HELL */
if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE) {
return -EBUSY;
}
if (callflags&QDIO_FLAG_SYNC_INPUT) {
/* This is the inbound handling of queues */
q=irq_ptr->input_qs[queue_number];
used_elements=atomic_return_add(count,
&q->number_of_buffers_used);
qdio_do_qdio_fill_input(q,qidx,count,buffers);
if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
(callflags&QDIO_FLAG_UNDER_INTERRUPT))
atomic_swap(&q->polling,0);
if (!used_elements) if (!(callflags&QDIO_FLAG_DONT_SIGA)) {
if (q->siga_in) {
result=qdio_siga_input(q);
if (result) {
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;
}
}
qdio_mark_q(q);
}
} else if (callflags&QDIO_FLAG_SYNC_OUTPUT) {
/* This is the outbound handling of queues */
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.start_time_outbound=NOW;
#endif /* QDIO_PERFORMANCE_STATS */
q=irq_ptr->output_qs[queue_number];
qdio_do_qdio_fill_output(q,qidx,count,buffers);
used_elements=atomic_return_add(count,
&q->number_of_buffers_used);
if (!(callflags&QDIO_FLAG_DONT_SIGA)) {
if (q->is_iqdio_q) {
/* one siga for every sbal */
while (count--) {
qdio_kick_outbound_q(q);
}
__qdio_outbound_processing(q);
} else {
/* under VM, we do a SIGA sync
* unconditionally */
SYNC_MEMORY;
else {
/* w/o shadow queues (else branch of
* SYNC_MEMORY :-/ ), we try to
* fast-requeue buffers */
if (q->slsb.acc.val
[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
&(QDIO_MAX_BUFFERS_PER_Q-1)]!=
SLSB_CU_OUTPUT_PRIMED) {
qdio_kick_outbound_q(q);
} else {
#ifdef QDIO_DBF_LIKE_HELL
QDIO_DBF_TEXT3(0,trace,
"fast-req");
#endif /* QDIO_DBF_LIKE_HELL */
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.fast_reqs++;
#endif /* QDIO_PERFORMANCE_STATS */
}
}
/* only marking the q could take
* too long, the upper layer
* module could do a lot of
* traffic in that time */
__qdio_outbound_processing(q);
}
}
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
perf_stats.outbound_cnt++;
#endif /* QDIO_PERFORMANCE_STATS */
} else {
QDIO_DBF_TEXT3(1,trace,"doQD:inv");
return -EINVAL;
}
return 0;
}
#ifdef QDIO_PERFORMANCE_STATS
static int qdio_perf_procfile_read(char *buffer,char **buffer_location,
off_t offset,int buffer_length,int *eof,
void *data)
{
int c=0,bucket;
qdio_irq_t *irq_ptr;
/* we are always called with buffer_length=4k, so we all
deliver on the first read */
if (offset>0) return 0;
#define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
_OUTP_IT("i_p_nc/c=%lu/%lu\n",i_p_nc,i_p_c);
_OUTP_IT("ii_p_nc/c=%lu/%lu\n",ii_p_nc,ii_p_c);
_OUTP_IT("o_p_nc/c=%lu/%lu\n",o_p_nc,o_p_c);
_OUTP_IT("Number of tasklet runs (total) : %u\n",
perf_stats.tl_runs);
_OUTP_IT("\n");
_OUTP_IT("Number of SIGA sync's issued : %u\n",
perf_stats.siga_syncs);
_OUTP_IT("Number of SIGA in's issued : %u\n",
perf_stats.siga_ins);
_OUTP_IT("Number of SIGA out's issued : %u\n",
perf_stats.siga_outs);
_OUTP_IT("Number of PCIs caught : %u\n",
perf_stats.pcis);
_OUTP_IT("Number of adapter interrupts caught : %u\n",
perf_stats.thinints);
_OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA) : %u\n",
perf_stats.fast_reqs);
_OUTP_IT("\n");
_OUTP_IT("Total time of all inbound actions (us) incl. UL : %u\n",
perf_stats.inbound_time);
_OUTP_IT("Number of inbound transfers : %u\n",
perf_stats.inbound_cnt);
_OUTP_IT("Total time of all outbound do_QDIOs (us) : %u\n",
perf_stats.outbound_time);
_OUTP_IT("Number of do_QDIOs outbound : %u\n",
perf_stats.outbound_cnt);
_OUTP_IT("\n");
for (bucket=0;bucket<QDIO_IRQ_BUCKETS;bucket++) {
irq_ptr=first_irq[bucket];
while (irq_ptr) {
_OUTP_IT("Polling time on irq %4x" \
" : %u\n",
irq_ptr->irq,irq_ptr->input_qs[0]->
timing.threshold);
irq_ptr=irq_ptr->next;
}
}
return c;
}
static struct proc_dir_entry *qdio_perf_proc_file;
#endif /* QDIO_PERFORMANCE_STATS */
static void qdio_add_procfs_entry(void)
{
#ifdef QDIO_PERFORMANCE_STATS
proc_perf_file_registration=0;
qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
S_IFREG|0444,&proc_root);
if (qdio_perf_proc_file) {
qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read;
} else proc_perf_file_registration=-1;
if (proc_perf_file_registration)
QDIO_PRINT_WARN("was not able to register perf. " \
"proc-file (%i).\n",
proc_perf_file_registration);
#endif /* QDIO_PERFORMANCE_STATS */
}
#ifdef MODULE
static void qdio_remove_procfs_entry(void)
{
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.tl_runs=0;
if (!proc_perf_file_registration) /* means if it went ok earlier */
remove_proc_entry(QDIO_PERF,&proc_root);
#endif /* QDIO_PERFORMANCE_STATS */
}
#endif /* MODULE */
static void tiqdio_register_thinints(void)
{
char dbf_text[20];
register_thinint_result=
s390_register_adapter_interrupt(&tiqdio_thinint_handler);
if (register_thinint_result) {
sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff));
QDIO_DBF_TEXT0(0,setup,dbf_text);
QDIO_PRINT_ERR("failed to register adapter handler " \
"(rc=%i).\nAdapter interrupts might " \
"not work. Continuing.\n",
register_thinint_result);
}
}
#ifdef MODULE
static void tiqdio_unregister_thinints(void)
{
if (!register_thinint_result)
s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
}
#endif /* MODULE */
static int qdio_get_qdio_memory(void)
{
int i;
indicator_used[0]=1;
for (i=1;i<INDICATORS_PER_CACHELINE;i++)
indicator_used[i]=0;
indicators=(__u32*)kmalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
GFP_KERNEL);
if (!indicators) return -ENOMEM;
memset(indicators,0,sizeof(__u32)*(INDICATORS_PER_CACHELINE));
chsc_area=(qdio_chsc_area_t *)
kmalloc(sizeof(qdio_chsc_area_t),GFP_KERNEL);
QDIO_DBF_TEXT3(0,trace,"chscarea"); \
QDIO_DBF_HEX3(0,trace,&chsc_area,sizeof(void*)); \
if (!chsc_area) {
/* ahem... let's call it data area */
QDIO_PRINT_ERR("not enough memory for data area. Cannot " \
"initialize QDIO.\n");
kfree(indicators);
return -ENOMEM;
}
memset(chsc_area,0,sizeof(qdio_chsc_area_t));
return 0;
}
#ifdef MODULE
static void qdio_release_qdio_memory(void)
{
kfree(chsc_area);
if (indicators) kfree(indicators);
}
#endif /* MODULE */
int init_module(void); /* we want to use it in init_QDIO */
static void qdio_unregister_dbf_views(void)
{
if (qdio_dbf_setup)
debug_unregister(qdio_dbf_setup);
if (qdio_dbf_sbal)
debug_unregister(qdio_dbf_sbal);
if (qdio_dbf_sense)
debug_unregister(qdio_dbf_sense);
if (qdio_dbf_trace)
debug_unregister(qdio_dbf_trace);
#ifdef QDIO_DBF_LIKE_HELL
if (qdio_dbf_slsb_out)
debug_unregister(qdio_dbf_slsb_out);
if (qdio_dbf_slsb_in)
debug_unregister(qdio_dbf_slsb_in);
#endif /* QDIO_DBF_LIKE_HELL */
}
/* this is not __initfunc, as it is called from init_module */
int init_QDIO(void)
{
char dbf_text[20];
int res;
#if defined(MODULE)||defined(QDIO_PERFORMANCE_STATS)
void *ptr;
#endif /* defined(MODULE)||defined(QDIO_PERFORMANCE_STATS) */
qdio_eyecatcher();
printk("qdio: loading %s\n",version);
res=qdio_get_qdio_memory();
if (res) return res;
sema_init(&init_sema,1);
qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
QDIO_DBF_SETUP_INDEX,
QDIO_DBF_SETUP_NR_AREAS,
QDIO_DBF_SETUP_LEN);
if (!qdio_dbf_setup) goto oom;
debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view);
debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL);
qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME,
QDIO_DBF_SBAL_INDEX,
QDIO_DBF_SBAL_NR_AREAS,
QDIO_DBF_SBAL_LEN);
if (!qdio_dbf_sbal) goto oom;
debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view);
debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL);
qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME,
QDIO_DBF_SENSE_INDEX,
QDIO_DBF_SENSE_NR_AREAS,
QDIO_DBF_SENSE_LEN);
if (!qdio_dbf_sense) goto oom;
debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view);
debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL);
qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME,
QDIO_DBF_TRACE_INDEX,
QDIO_DBF_TRACE_NR_AREAS,
QDIO_DBF_TRACE_LEN);
if (!qdio_dbf_trace) goto oom;
debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view);
debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL);
#ifdef QDIO_DBF_LIKE_HELL
qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
QDIO_DBF_SLSB_OUT_INDEX,
QDIO_DBF_SLSB_OUT_NR_AREAS,
QDIO_DBF_SLSB_OUT_LEN);
if (!qdio_dbf_slsb_out) goto oom;
debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view);
debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL);
qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME,
QDIO_DBF_SLSB_IN_INDEX,
QDIO_DBF_SLSB_IN_NR_AREAS,
QDIO_DBF_SLSB_IN_LEN);
if (!qdio_dbf_slsb_in) goto oom;
debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view);
debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL);
#endif /* QDIO_DBF_LIKE_HELL */
#ifdef QDIO_PERFORMANCE_STATS
memset((void*)&perf_stats,0,sizeof(perf_stats));
QDIO_DBF_TEXT0(0,setup,"perfstat");
ptr=&perf_stats;
QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
#endif /* QDIO_PERFORMANCE_STATS */
#ifdef MODULE
QDIO_DBF_TEXT0(0,setup,"initmodl");
ptr=&init_module;
QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
#endif /* MODULE */
qdio_add_procfs_entry();
qdio_check_for_machine_features();
sprintf(dbf_text,"hydrati%1x",hydra_thinints);
QDIO_DBF_TEXT0(0,setup,dbf_text);
sprintf(dbf_text,"omitsvs%1x",omit_svs);
QDIO_DBF_TEXT0(0,setup,dbf_text);
tiqdio_register_thinints();
return 0;
oom:
QDIO_PRINT_ERR("not enough memory for dbf.\n");
qdio_unregister_dbf_views();
return -ENOMEM;
}
#ifdef MODULE
int init_module(void)
{
return init_QDIO();
}
void cleanup_module(void)
{
tiqdio_unregister_thinints();
qdio_remove_procfs_entry();
qdio_release_qdio_memory();
qdio_unregister_dbf_views();
printk("qdio: %s: module removed\n",version);
}
#else /* MODULE */
static int __init initcall_QDIO(void)
{
return init_QDIO();
}
__initcall(initcall_QDIO);
#endif /* MODULE */
EXPORT_SYMBOL(qdio_initialize);
EXPORT_SYMBOL(qdio_activate);
EXPORT_SYMBOL(do_QDIO);
EXPORT_SYMBOL(qdio_cleanup);
EXPORT_SYMBOL(qdio_eyecatcher);
EXPORT_SYMBOL(qdio_synchronize);
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