![Ursula Braun](/assets/img/avatar_default.png)
Remove CONFIG_QETH_PERF_STATS and use a sysfs attribute instead. We want to have the ability to turn the statistics on/off at runtime. Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
3884 lines
100 KiB
C
3884 lines
100 KiB
C
/*
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*
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* linux/drivers/s390/cio/qdio.c
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*
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* Linux for S/390 QDIO base support, Hipersocket base support
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* version 2
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*
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* Copyright 2000,2002 IBM Corporation
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* Author(s): Utz Bacher <utz.bacher@de.ibm.com>
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* 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com>
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*
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* Restriction: only 63 iqdio subchannels would have its own indicator,
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* after that, subsequent subchannels share one indicator
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*
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*
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/proc_fs.h>
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#include <linux/timer.h>
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#include <linux/mempool.h>
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#include <asm/ccwdev.h>
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#include <asm/io.h>
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#include <asm/atomic.h>
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#include <asm/semaphore.h>
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#include <asm/timex.h>
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#include <asm/debug.h>
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#include <asm/s390_rdev.h>
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#include <asm/qdio.h>
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#include "cio.h"
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#include "css.h"
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#include "device.h"
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#include "airq.h"
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#include "qdio.h"
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#include "ioasm.h"
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#include "chsc.h"
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/****************** MODULE PARAMETER VARIABLES ********************/
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MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
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MODULE_DESCRIPTION("QDIO base support version 2, " \
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"Copyright 2000 IBM Corporation");
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MODULE_LICENSE("GPL");
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/******************** HERE WE GO ***********************************/
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static const char version[] = "QDIO base support version 2";
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extern struct bus_type ccw_bus_type;
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static int qdio_performance_stats = 0;
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static int proc_perf_file_registration;
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static unsigned long i_p_c, i_p_nc, o_p_c, o_p_nc, ii_p_c, ii_p_nc;
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static struct qdio_perf_stats perf_stats;
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static int hydra_thinints;
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static int is_passthrough = 0;
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static int omit_svs;
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static int indicator_used[INDICATORS_PER_CACHELINE];
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static __u32 * volatile indicators;
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static __u32 volatile spare_indicator;
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static atomic_t spare_indicator_usecount;
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#define QDIO_MEMPOOL_SCSSC_ELEMENTS 2
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static mempool_t *qdio_mempool_scssc;
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static debug_info_t *qdio_dbf_setup;
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static debug_info_t *qdio_dbf_sbal;
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static debug_info_t *qdio_dbf_trace;
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static debug_info_t *qdio_dbf_sense;
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#ifdef CONFIG_QDIO_DEBUG
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static debug_info_t *qdio_dbf_slsb_out;
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static debug_info_t *qdio_dbf_slsb_in;
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#endif /* CONFIG_QDIO_DEBUG */
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/* iQDIO stuff: */
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static volatile struct qdio_q *tiq_list=NULL; /* volatile as it could change
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during a while loop */
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static DEFINE_SPINLOCK(ttiq_list_lock);
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static int register_thinint_result;
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static void tiqdio_tl(unsigned long);
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static DECLARE_TASKLET(tiqdio_tasklet,tiqdio_tl,0);
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/* not a macro, as one of the arguments is atomic_read */
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static inline int
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qdio_min(int a,int b)
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{
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if (a<b)
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return a;
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else
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return b;
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}
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/***************** SCRUBBER HELPER ROUTINES **********************/
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static inline __u64
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qdio_get_micros(void)
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{
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return (get_clock() >> 12); /* time>>12 is microseconds */
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}
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/*
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* unfortunately, we can't just xchg the values; in do_QDIO we want to reserve
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* the q in any case, so that we'll not be interrupted when we are in
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* qdio_mark_tiq... shouldn't have a really bad impact, as reserving almost
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* ever works (last famous words)
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*/
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static inline int
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qdio_reserve_q(struct qdio_q *q)
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{
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return atomic_add_return(1,&q->use_count) - 1;
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}
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static inline void
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qdio_release_q(struct qdio_q *q)
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{
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atomic_dec(&q->use_count);
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}
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/*check ccq */
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static inline int
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qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
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{
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char dbf_text[15];
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if (ccq == 0 || ccq == 32 || ccq == 96)
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return 0;
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if (ccq == 97)
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return 1;
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/*notify devices immediately*/
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sprintf(dbf_text,"%d", ccq);
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QDIO_DBF_TEXT2(1,trace,dbf_text);
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return -EIO;
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}
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/* EQBS: extract buffer states */
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static inline int
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qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
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unsigned int *start, unsigned int *cnt)
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{
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struct qdio_irq *irq;
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unsigned int tmp_cnt, q_no, ccq;
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int rc ;
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char dbf_text[15];
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ccq = 0;
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tmp_cnt = *cnt;
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irq = (struct qdio_irq*)q->irq_ptr;
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q_no = q->q_no;
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if(!q->is_input_q)
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q_no += irq->no_input_qs;
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again:
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ccq = do_eqbs(irq->sch_token, state, q_no, start, cnt);
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rc = qdio_check_ccq(q, ccq);
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if (rc == 1) {
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QDIO_DBF_TEXT5(1,trace,"eqAGAIN");
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goto again;
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}
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if (rc < 0) {
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QDIO_DBF_TEXT2(1,trace,"eqberr");
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sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt, *cnt, ccq, q_no);
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QDIO_DBF_TEXT2(1,trace,dbf_text);
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q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
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QDIO_STATUS_LOOK_FOR_ERROR,
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0, 0, 0, -1, -1, q->int_parm);
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return 0;
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}
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return (tmp_cnt - *cnt);
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}
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/* SQBS: set buffer states */
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static inline int
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qdio_do_sqbs(struct qdio_q *q, unsigned char state,
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unsigned int *start, unsigned int *cnt)
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{
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struct qdio_irq *irq;
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unsigned int tmp_cnt, q_no, ccq;
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int rc;
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char dbf_text[15];
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ccq = 0;
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tmp_cnt = *cnt;
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irq = (struct qdio_irq*)q->irq_ptr;
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q_no = q->q_no;
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if(!q->is_input_q)
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q_no += irq->no_input_qs;
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again:
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ccq = do_sqbs(irq->sch_token, state, q_no, start, cnt);
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rc = qdio_check_ccq(q, ccq);
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if (rc == 1) {
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QDIO_DBF_TEXT5(1,trace,"sqAGAIN");
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goto again;
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}
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if (rc < 0) {
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QDIO_DBF_TEXT3(1,trace,"sqberr");
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sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt,*cnt,ccq,q_no);
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QDIO_DBF_TEXT3(1,trace,dbf_text);
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q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
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QDIO_STATUS_LOOK_FOR_ERROR,
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0, 0, 0, -1, -1, q->int_parm);
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return 0;
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}
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return (tmp_cnt - *cnt);
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}
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static inline int
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qdio_set_slsb(struct qdio_q *q, unsigned int *bufno,
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unsigned char state, unsigned int *count)
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{
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volatile char *slsb;
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struct qdio_irq *irq;
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irq = (struct qdio_irq*)q->irq_ptr;
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if (!irq->is_qebsm) {
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slsb = (char *)&q->slsb.acc.val[(*bufno)];
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xchg(slsb, state);
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return 1;
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}
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return qdio_do_sqbs(q, state, bufno, count);
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}
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#ifdef CONFIG_QDIO_DEBUG
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static inline void
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qdio_trace_slsb(struct qdio_q *q)
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{
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if (q->queue_type==QDIO_TRACE_QTYPE) {
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if (q->is_input_q)
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QDIO_DBF_HEX2(0,slsb_in,&q->slsb,
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QDIO_MAX_BUFFERS_PER_Q);
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else
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QDIO_DBF_HEX2(0,slsb_out,&q->slsb,
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QDIO_MAX_BUFFERS_PER_Q);
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}
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}
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#endif
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static inline int
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set_slsb(struct qdio_q *q, unsigned int *bufno,
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unsigned char state, unsigned int *count)
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{
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int rc;
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#ifdef CONFIG_QDIO_DEBUG
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qdio_trace_slsb(q);
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#endif
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rc = qdio_set_slsb(q, bufno, state, count);
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#ifdef CONFIG_QDIO_DEBUG
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qdio_trace_slsb(q);
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#endif
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return rc;
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}
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static inline int
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qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
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unsigned int gpr3)
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{
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int cc;
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QDIO_DBF_TEXT4(0,trace,"sigasync");
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QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
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if (qdio_performance_stats)
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perf_stats.siga_syncs++;
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cc = do_siga_sync(q->schid, gpr2, gpr3);
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if (cc)
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QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
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return cc;
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}
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static inline int
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qdio_siga_sync_q(struct qdio_q *q)
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{
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if (q->is_input_q)
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return qdio_siga_sync(q, 0, q->mask);
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return qdio_siga_sync(q, q->mask, 0);
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}
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static int
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__do_siga_output(struct qdio_q *q, unsigned int *busy_bit)
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{
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struct qdio_irq *irq;
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unsigned int fc = 0;
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unsigned long schid;
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irq = (struct qdio_irq *) q->irq_ptr;
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if (!irq->is_qebsm)
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schid = *((u32 *)&q->schid);
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else {
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schid = irq->sch_token;
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fc |= 0x80;
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}
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return do_siga_output(schid, q->mask, busy_bit, fc);
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}
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/*
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* returns QDIO_SIGA_ERROR_ACCESS_EXCEPTION as cc, when SIGA returns
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* an access exception
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*/
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static inline int
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qdio_siga_output(struct qdio_q *q)
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{
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int cc;
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__u32 busy_bit;
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__u64 start_time=0;
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if (qdio_performance_stats)
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perf_stats.siga_outs++;
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QDIO_DBF_TEXT4(0,trace,"sigaout");
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QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
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for (;;) {
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cc = __do_siga_output(q, &busy_bit);
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//QDIO_PRINT_ERR("cc=%x, busy=%x\n",cc,busy_bit);
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if ((cc==2) && (busy_bit) && (q->is_iqdio_q)) {
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if (!start_time)
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start_time=NOW;
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if ((NOW-start_time)>QDIO_BUSY_BIT_PATIENCE)
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break;
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} else
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break;
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}
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if ((cc==2) && (busy_bit))
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cc |= QDIO_SIGA_ERROR_B_BIT_SET;
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if (cc)
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QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
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return cc;
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}
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static inline int
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qdio_siga_input(struct qdio_q *q)
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{
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int cc;
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QDIO_DBF_TEXT4(0,trace,"sigain");
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QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
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if (qdio_performance_stats)
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perf_stats.siga_ins++;
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cc = do_siga_input(q->schid, q->mask);
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if (cc)
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QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
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return cc;
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}
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/* locked by the locks in qdio_activate and qdio_cleanup */
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static __u32 *
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qdio_get_indicator(void)
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{
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int i;
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for (i=1;i<INDICATORS_PER_CACHELINE;i++)
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if (!indicator_used[i]) {
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indicator_used[i]=1;
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return indicators+i;
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}
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atomic_inc(&spare_indicator_usecount);
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return (__u32 * volatile) &spare_indicator;
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}
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/* locked by the locks in qdio_activate and qdio_cleanup */
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static void
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qdio_put_indicator(__u32 *addr)
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{
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int i;
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if ( (addr) && (addr!=&spare_indicator) ) {
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i=addr-indicators;
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indicator_used[i]=0;
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}
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if (addr == &spare_indicator)
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atomic_dec(&spare_indicator_usecount);
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}
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static inline void
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tiqdio_clear_summary_bit(__u32 *location)
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{
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QDIO_DBF_TEXT5(0,trace,"clrsummb");
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QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
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xchg(location,0);
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}
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static inline void
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tiqdio_set_summary_bit(__u32 *location)
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{
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QDIO_DBF_TEXT5(0,trace,"setsummb");
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QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
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xchg(location,-1);
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}
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static inline void
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tiqdio_sched_tl(void)
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{
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tasklet_hi_schedule(&tiqdio_tasklet);
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}
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static inline void
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qdio_mark_tiq(struct qdio_q *q)
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{
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unsigned long flags;
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QDIO_DBF_TEXT4(0,trace,"mark iq");
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QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
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spin_lock_irqsave(&ttiq_list_lock,flags);
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if (unlikely(atomic_read(&q->is_in_shutdown)))
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goto out_unlock;
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if (!q->is_input_q)
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goto out_unlock;
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if ((q->list_prev) || (q->list_next))
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goto out_unlock;
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if (!tiq_list) {
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tiq_list=q;
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q->list_prev=q;
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q->list_next=q;
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} else {
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q->list_next=tiq_list;
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q->list_prev=tiq_list->list_prev;
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tiq_list->list_prev->list_next=q;
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tiq_list->list_prev=q;
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}
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spin_unlock_irqrestore(&ttiq_list_lock,flags);
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tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
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tiqdio_sched_tl();
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return;
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out_unlock:
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spin_unlock_irqrestore(&ttiq_list_lock,flags);
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return;
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}
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static inline void
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qdio_mark_q(struct qdio_q *q)
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{
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QDIO_DBF_TEXT4(0,trace,"mark q");
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QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
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if (unlikely(atomic_read(&q->is_in_shutdown)))
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return;
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tasklet_schedule(&q->tasklet);
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}
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static inline int
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qdio_stop_polling(struct qdio_q *q)
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{
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#ifdef QDIO_USE_PROCESSING_STATE
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unsigned int tmp, gsf, count = 1;
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unsigned char state = 0;
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struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
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if (!atomic_xchg(&q->polling,0))
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return 1;
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QDIO_DBF_TEXT4(0,trace,"stoppoll");
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QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
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/* show the card that we are not polling anymore */
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if (!q->is_input_q)
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return 1;
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tmp = gsf = GET_SAVED_FRONTIER(q);
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tmp = ((tmp + QDIO_MAX_BUFFERS_PER_Q-1) & (QDIO_MAX_BUFFERS_PER_Q-1) );
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set_slsb(q, &tmp, SLSB_P_INPUT_NOT_INIT, &count);
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/*
|
|
* 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 (irq->is_qebsm) {
|
|
count = 1;
|
|
qdio_do_eqbs(q, &state, &gsf, &count);
|
|
} else
|
|
state = q->slsb.acc.val[gsf];
|
|
if (state != SLSB_P_INPUT_PRIMED)
|
|
return 1;
|
|
/*
|
|
* set our summary bit again, as otherwise there is a
|
|
* small window we can miss between resetting it and
|
|
* checking for PRIMED state
|
|
*/
|
|
if (q->is_thinint_q)
|
|
tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
|
|
return 0;
|
|
|
|
#else /* QDIO_USE_PROCESSING_STATE */
|
|
return 1;
|
|
#endif /* QDIO_USE_PROCESSING_STATE */
|
|
}
|
|
|
|
/*
|
|
* see the comment in do_QDIO and before qdio_reserve_q about the
|
|
* sophisticated locking outside of unmark_q, so that we don't need to
|
|
* disable the interrupts :-)
|
|
*/
|
|
static inline void
|
|
qdio_unmark_q(struct qdio_q *q)
|
|
{
|
|
unsigned long flags;
|
|
|
|
QDIO_DBF_TEXT4(0,trace,"unmark q");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
|
|
if ((!q->list_prev)||(!q->list_next))
|
|
return;
|
|
|
|
if ((q->is_thinint_q)&&(q->is_input_q)) {
|
|
/* iQDIO */
|
|
spin_lock_irqsave(&ttiq_list_lock,flags);
|
|
/* in case cleanup has done this already and simultanously
|
|
* qdio_unmark_q is called from the interrupt handler, we've
|
|
* got to check this in this specific case again */
|
|
if ((!q->list_prev)||(!q->list_next))
|
|
goto out;
|
|
if (q->list_next==q) {
|
|
/* q was the only interesting q */
|
|
tiq_list=NULL;
|
|
q->list_next=NULL;
|
|
q->list_prev=NULL;
|
|
} else {
|
|
q->list_next->list_prev=q->list_prev;
|
|
q->list_prev->list_next=q->list_next;
|
|
tiq_list=q->list_next;
|
|
q->list_next=NULL;
|
|
q->list_prev=NULL;
|
|
}
|
|
out:
|
|
spin_unlock_irqrestore(&ttiq_list_lock,flags);
|
|
}
|
|
}
|
|
|
|
static inline unsigned long
|
|
tiqdio_clear_global_summary(void)
|
|
{
|
|
unsigned long time;
|
|
|
|
QDIO_DBF_TEXT5(0,trace,"clrglobl");
|
|
|
|
time = do_clear_global_summary();
|
|
|
|
QDIO_DBF_HEX5(0,trace,&time,sizeof(unsigned long));
|
|
|
|
return time;
|
|
}
|
|
|
|
|
|
/************************* OUTBOUND ROUTINES *******************************/
|
|
static int
|
|
qdio_qebsm_get_outbound_buffer_frontier(struct qdio_q *q)
|
|
{
|
|
struct qdio_irq *irq;
|
|
unsigned char state;
|
|
unsigned int cnt, count, ftc;
|
|
|
|
irq = (struct qdio_irq *) q->irq_ptr;
|
|
if ((!q->is_iqdio_q) && (!q->hydra_gives_outbound_pcis))
|
|
SYNC_MEMORY;
|
|
|
|
ftc = q->first_to_check;
|
|
count = qdio_min(atomic_read(&q->number_of_buffers_used),
|
|
(QDIO_MAX_BUFFERS_PER_Q-1));
|
|
if (count == 0)
|
|
return q->first_to_check;
|
|
cnt = qdio_do_eqbs(q, &state, &ftc, &count);
|
|
if (cnt == 0)
|
|
return q->first_to_check;
|
|
switch (state) {
|
|
case SLSB_P_OUTPUT_ERROR:
|
|
QDIO_DBF_TEXT3(0,trace,"outperr");
|
|
atomic_sub(cnt , &q->number_of_buffers_used);
|
|
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;
|
|
q->first_to_check = ftc;
|
|
break;
|
|
case SLSB_P_OUTPUT_EMPTY:
|
|
QDIO_DBF_TEXT5(0,trace,"outpempt");
|
|
atomic_sub(cnt, &q->number_of_buffers_used);
|
|
q->first_to_check = ftc;
|
|
break;
|
|
case SLSB_CU_OUTPUT_PRIMED:
|
|
/* all buffers primed */
|
|
QDIO_DBF_TEXT5(0,trace,"outpprim");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
|
|
return q->first_to_check;
|
|
}
|
|
|
|
static int
|
|
qdio_qebsm_get_inbound_buffer_frontier(struct qdio_q *q)
|
|
{
|
|
struct qdio_irq *irq;
|
|
unsigned char state;
|
|
int tmp, ftc, count, cnt;
|
|
char dbf_text[15];
|
|
|
|
|
|
irq = (struct qdio_irq *) q->irq_ptr;
|
|
ftc = q->first_to_check;
|
|
count = qdio_min(atomic_read(&q->number_of_buffers_used),
|
|
(QDIO_MAX_BUFFERS_PER_Q-1));
|
|
if (count == 0)
|
|
return q->first_to_check;
|
|
cnt = qdio_do_eqbs(q, &state, &ftc, &count);
|
|
if (cnt == 0)
|
|
return q->first_to_check;
|
|
switch (state) {
|
|
case SLSB_P_INPUT_ERROR :
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
QDIO_DBF_TEXT3(1,trace,"inperr");
|
|
sprintf(dbf_text,"%2x,%2x",ftc,count);
|
|
QDIO_DBF_TEXT3(1,trace,dbf_text);
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
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;
|
|
atomic_sub(cnt, &q->number_of_buffers_used);
|
|
q->first_to_check = ftc;
|
|
break;
|
|
case SLSB_P_INPUT_PRIMED :
|
|
QDIO_DBF_TEXT3(0,trace,"inptprim");
|
|
sprintf(dbf_text,"%2x,%2x",ftc,count);
|
|
QDIO_DBF_TEXT3(1,trace,dbf_text);
|
|
tmp = 0;
|
|
ftc = q->first_to_check;
|
|
#ifdef QDIO_USE_PROCESSING_STATE
|
|
if (cnt > 1) {
|
|
cnt -= 1;
|
|
tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
|
|
if (!tmp)
|
|
break;
|
|
}
|
|
cnt = 1;
|
|
tmp += set_slsb(q, &ftc,
|
|
SLSB_P_INPUT_PROCESSING, &cnt);
|
|
atomic_set(&q->polling, 1);
|
|
#else
|
|
tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
|
|
#endif
|
|
atomic_sub(tmp, &q->number_of_buffers_used);
|
|
q->first_to_check = ftc;
|
|
break;
|
|
case SLSB_CU_INPUT_EMPTY:
|
|
case SLSB_P_INPUT_NOT_INIT:
|
|
case SLSB_P_INPUT_PROCESSING:
|
|
QDIO_DBF_TEXT5(0,trace,"inpnipro");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
|
|
return q->first_to_check;
|
|
}
|
|
|
|
static inline int
|
|
qdio_get_outbound_buffer_frontier(struct qdio_q *q)
|
|
{
|
|
struct qdio_irq *irq;
|
|
volatile char *slsb;
|
|
unsigned int count = 1;
|
|
int first_not_to_check, f, f_mod_no;
|
|
char dbf_text[15];
|
|
|
|
QDIO_DBF_TEXT4(0,trace,"getobfro");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
|
|
irq = (struct qdio_irq *) q->irq_ptr;
|
|
if (irq->is_qebsm)
|
|
return qdio_qebsm_get_outbound_buffer_frontier(q);
|
|
|
|
slsb=&q->slsb.acc.val[0];
|
|
f_mod_no=f=q->first_to_check;
|
|
/*
|
|
* f points to already processed elements, so f+no_used is correct...
|
|
* ... but: we don't check 128 buffers, as otherwise
|
|
* qdio_has_outbound_q_moved would return 0
|
|
*/
|
|
first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
|
|
(QDIO_MAX_BUFFERS_PER_Q-1));
|
|
|
|
if ((!q->is_iqdio_q)&&(!q->hydra_gives_outbound_pcis))
|
|
SYNC_MEMORY;
|
|
|
|
check_next:
|
|
if (f==first_not_to_check)
|
|
goto out;
|
|
|
|
switch(slsb[f_mod_no]) {
|
|
|
|
/* the adapter has not fetched the output yet */
|
|
case SLSB_CU_OUTPUT_PRIMED:
|
|
QDIO_DBF_TEXT5(0,trace,"outpprim");
|
|
break;
|
|
|
|
/* the adapter got it */
|
|
case SLSB_P_OUTPUT_EMPTY:
|
|
atomic_dec(&q->number_of_buffers_used);
|
|
f++;
|
|
f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
|
|
QDIO_DBF_TEXT5(0,trace,"outpempt");
|
|
goto check_next;
|
|
|
|
case SLSB_P_OUTPUT_ERROR:
|
|
QDIO_DBF_TEXT3(0,trace,"outperr");
|
|
sprintf(dbf_text,"%x-%x-%x",f_mod_no,
|
|
q->sbal[f_mod_no]->element[14].sbalf.value,
|
|
q->sbal[f_mod_no]->element[15].sbalf.value);
|
|
QDIO_DBF_TEXT3(1,trace,dbf_text);
|
|
QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
|
|
|
|
/* kind of process the buffer */
|
|
set_slsb(q, &f_mod_no, SLSB_P_OUTPUT_NOT_INIT, &count);
|
|
|
|
/*
|
|
* we increment the frontier, as this buffer
|
|
* was processed obviously
|
|
*/
|
|
atomic_dec(&q->number_of_buffers_used);
|
|
f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
|
|
|
|
if (q->qdio_error)
|
|
q->error_status_flags|=
|
|
QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
|
|
q->qdio_error=SLSB_P_OUTPUT_ERROR;
|
|
q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
|
|
|
|
break;
|
|
|
|
/* no new buffers */
|
|
default:
|
|
QDIO_DBF_TEXT5(0,trace,"outpni");
|
|
}
|
|
out:
|
|
return (q->first_to_check=f_mod_no);
|
|
}
|
|
|
|
/* all buffers are processed */
|
|
static inline int
|
|
qdio_is_outbound_q_done(struct qdio_q *q)
|
|
{
|
|
int no_used;
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
char dbf_text[15];
|
|
#endif
|
|
|
|
no_used=atomic_read(&q->number_of_buffers_used);
|
|
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
if (no_used) {
|
|
sprintf(dbf_text,"oqisnt%02x",no_used);
|
|
QDIO_DBF_TEXT4(0,trace,dbf_text);
|
|
} else {
|
|
QDIO_DBF_TEXT4(0,trace,"oqisdone");
|
|
}
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
return (no_used==0);
|
|
}
|
|
|
|
static inline int
|
|
qdio_has_outbound_q_moved(struct qdio_q *q)
|
|
{
|
|
int i;
|
|
|
|
i=qdio_get_outbound_buffer_frontier(q);
|
|
|
|
if ( (i!=GET_SAVED_FRONTIER(q)) ||
|
|
(q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
|
|
SAVE_FRONTIER(q,i);
|
|
QDIO_DBF_TEXT4(0,trace,"oqhasmvd");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
return 1;
|
|
} else {
|
|
QDIO_DBF_TEXT4(0,trace,"oqhsntmv");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
qdio_kick_outbound_q(struct qdio_q *q)
|
|
{
|
|
int result;
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
char dbf_text[15];
|
|
|
|
QDIO_DBF_TEXT4(0,trace,"kickoutq");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
|
|
if (!q->siga_out)
|
|
return;
|
|
|
|
/* here's the story with cc=2 and busy bit set (thanks, Rick):
|
|
* VM's CP could present us cc=2 and busy bit set on SIGA-write
|
|
* during reconfiguration of their Guest LAN (only in HIPERS mode,
|
|
* QDIO mode is asynchronous -- cc=2 and busy bit there will take
|
|
* the queues down immediately; and not being under VM we have a
|
|
* problem on cc=2 and busy bit set right away).
|
|
*
|
|
* Therefore qdio_siga_output will try for a short time constantly,
|
|
* if such a condition occurs. If it doesn't change, it will
|
|
* increase the busy_siga_counter and save the timestamp, and
|
|
* schedule the queue for later processing (via mark_q, using the
|
|
* queue tasklet). __qdio_outbound_processing will check out the
|
|
* counter. If non-zero, it will call qdio_kick_outbound_q as often
|
|
* as the value of the counter. This will attempt further SIGA
|
|
* instructions. For each successful SIGA, the counter is
|
|
* decreased, for failing SIGAs the counter remains the same, after
|
|
* all.
|
|
* After some time of no movement, qdio_kick_outbound_q will
|
|
* finally fail and reflect corresponding error codes to call
|
|
* the upper layer module and have it take the queues down.
|
|
*
|
|
* Note that this is a change from the original HiperSockets design
|
|
* (saying cc=2 and busy bit means take the queues down), but in
|
|
* these days Guest LAN didn't exist... excessive cc=2 with busy bit
|
|
* conditions will still take the queues down, but the threshold is
|
|
* higher due to the Guest LAN environment.
|
|
*/
|
|
|
|
|
|
result=qdio_siga_output(q);
|
|
|
|
switch (result) {
|
|
case 0:
|
|
/* went smooth this time, reset timestamp */
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
QDIO_DBF_TEXT3(0,trace,"cc2reslv");
|
|
sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
|
|
atomic_read(&q->busy_siga_counter));
|
|
QDIO_DBF_TEXT3(0,trace,dbf_text);
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
q->timing.busy_start=0;
|
|
break;
|
|
case (2|QDIO_SIGA_ERROR_B_BIT_SET):
|
|
/* cc=2 and busy bit: */
|
|
atomic_inc(&q->busy_siga_counter);
|
|
|
|
/* if the last siga was successful, save
|
|
* timestamp here */
|
|
if (!q->timing.busy_start)
|
|
q->timing.busy_start=NOW;
|
|
|
|
/* if we're in time, don't touch error_status_flags
|
|
* and siga_error */
|
|
if (NOW-q->timing.busy_start<QDIO_BUSY_BIT_GIVE_UP) {
|
|
qdio_mark_q(q);
|
|
break;
|
|
}
|
|
QDIO_DBF_TEXT2(0,trace,"cc2REPRT");
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
|
|
atomic_read(&q->busy_siga_counter));
|
|
QDIO_DBF_TEXT3(0,trace,dbf_text);
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
/* else fallthrough and report error */
|
|
default:
|
|
/* for plain cc=1, 2 or 3: */
|
|
if (q->siga_error)
|
|
q->error_status_flags|=
|
|
QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
|
|
q->error_status_flags|=
|
|
QDIO_STATUS_LOOK_FOR_ERROR;
|
|
q->siga_error=result;
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
qdio_kick_outbound_handler(struct qdio_q *q)
|
|
{
|
|
int start, end, real_end, count;
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
char dbf_text[15];
|
|
#endif
|
|
|
|
start = q->first_element_to_kick;
|
|
/* last_move_ftc was just updated */
|
|
real_end = GET_SAVED_FRONTIER(q);
|
|
end = (real_end+QDIO_MAX_BUFFERS_PER_Q-1)&
|
|
(QDIO_MAX_BUFFERS_PER_Q-1);
|
|
count = (end+QDIO_MAX_BUFFERS_PER_Q+1-start)&
|
|
(QDIO_MAX_BUFFERS_PER_Q-1);
|
|
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
QDIO_DBF_TEXT4(0,trace,"kickouth");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
|
|
sprintf(dbf_text,"s=%2xc=%2x",start,count);
|
|
QDIO_DBF_TEXT4(0,trace,dbf_text);
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
|
|
if (q->state==QDIO_IRQ_STATE_ACTIVE)
|
|
q->handler(q->cdev,QDIO_STATUS_OUTBOUND_INT|
|
|
q->error_status_flags,
|
|
q->qdio_error,q->siga_error,q->q_no,start,count,
|
|
q->int_parm);
|
|
|
|
/* for the next time: */
|
|
q->first_element_to_kick=real_end;
|
|
q->qdio_error=0;
|
|
q->siga_error=0;
|
|
q->error_status_flags=0;
|
|
}
|
|
|
|
static inline void
|
|
__qdio_outbound_processing(struct qdio_q *q)
|
|
{
|
|
int siga_attempts;
|
|
|
|
QDIO_DBF_TEXT4(0,trace,"qoutproc");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
|
|
if (unlikely(qdio_reserve_q(q))) {
|
|
qdio_release_q(q);
|
|
if (qdio_performance_stats)
|
|
o_p_c++;
|
|
/* as we're sissies, we'll check next time */
|
|
if (likely(!atomic_read(&q->is_in_shutdown))) {
|
|
qdio_mark_q(q);
|
|
QDIO_DBF_TEXT4(0,trace,"busy,agn");
|
|
}
|
|
return;
|
|
}
|
|
if (qdio_performance_stats) {
|
|
o_p_nc++;
|
|
perf_stats.tl_runs++;
|
|
}
|
|
|
|
/* see comment in qdio_kick_outbound_q */
|
|
siga_attempts=atomic_read(&q->busy_siga_counter);
|
|
while (siga_attempts) {
|
|
atomic_dec(&q->busy_siga_counter);
|
|
qdio_kick_outbound_q(q);
|
|
siga_attempts--;
|
|
}
|
|
|
|
if (qdio_has_outbound_q_moved(q))
|
|
qdio_kick_outbound_handler(q);
|
|
|
|
if (q->is_iqdio_q) {
|
|
/*
|
|
* for asynchronous queues, we better check, if the fill
|
|
* level is too high. for synchronous queues, the fill
|
|
* level will never be that high.
|
|
*/
|
|
if (atomic_read(&q->number_of_buffers_used)>
|
|
IQDIO_FILL_LEVEL_TO_POLL)
|
|
qdio_mark_q(q);
|
|
|
|
} else if (!q->hydra_gives_outbound_pcis)
|
|
if (!qdio_is_outbound_q_done(q))
|
|
qdio_mark_q(q);
|
|
|
|
qdio_release_q(q);
|
|
}
|
|
|
|
static void
|
|
qdio_outbound_processing(struct qdio_q *q)
|
|
{
|
|
__qdio_outbound_processing(q);
|
|
}
|
|
|
|
/************************* INBOUND ROUTINES *******************************/
|
|
|
|
|
|
static inline int
|
|
qdio_get_inbound_buffer_frontier(struct qdio_q *q)
|
|
{
|
|
struct qdio_irq *irq;
|
|
int f,f_mod_no;
|
|
volatile char *slsb;
|
|
unsigned int count = 1;
|
|
int first_not_to_check;
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
char dbf_text[15];
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
#ifdef QDIO_USE_PROCESSING_STATE
|
|
int last_position=-1;
|
|
#endif /* QDIO_USE_PROCESSING_STATE */
|
|
|
|
QDIO_DBF_TEXT4(0,trace,"getibfro");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
|
|
irq = (struct qdio_irq *) q->irq_ptr;
|
|
if (irq->is_qebsm)
|
|
return qdio_qebsm_get_inbound_buffer_frontier(q);
|
|
|
|
slsb=&q->slsb.acc.val[0];
|
|
f_mod_no=f=q->first_to_check;
|
|
/*
|
|
* we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
|
|
* would return 0
|
|
*/
|
|
first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
|
|
(QDIO_MAX_BUFFERS_PER_Q-1));
|
|
|
|
/*
|
|
* we don't use this one, as a PCI or we after a thin interrupt
|
|
* will sync the queues
|
|
*/
|
|
/* SYNC_MEMORY;*/
|
|
|
|
check_next:
|
|
f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
|
|
if (f==first_not_to_check)
|
|
goto out;
|
|
switch (slsb[f_mod_no]) {
|
|
|
|
/* CU_EMPTY means frontier is reached */
|
|
case SLSB_CU_INPUT_EMPTY:
|
|
QDIO_DBF_TEXT5(0,trace,"inptempt");
|
|
break;
|
|
|
|
/* P_PRIMED means set slsb to P_PROCESSING and move on */
|
|
case SLSB_P_INPUT_PRIMED:
|
|
QDIO_DBF_TEXT5(0,trace,"inptprim");
|
|
|
|
#ifdef QDIO_USE_PROCESSING_STATE
|
|
/*
|
|
* as soon as running under VM, polling the input queues will
|
|
* kill VM in terms of CP overhead
|
|
*/
|
|
if (q->siga_sync) {
|
|
set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
|
|
} 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(q, &last_position,
|
|
SLSB_P_INPUT_NOT_INIT, &count);
|
|
atomic_set(&q->polling,1);
|
|
last_position=f_mod_no;
|
|
}
|
|
#else /* QDIO_USE_PROCESSING_STATE */
|
|
set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
|
|
#endif /* QDIO_USE_PROCESSING_STATE */
|
|
/*
|
|
* not needed, as the inbound queue will be synced on the next
|
|
* siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
|
|
*/
|
|
/*SYNC_MEMORY;*/
|
|
f++;
|
|
atomic_dec(&q->number_of_buffers_used);
|
|
goto check_next;
|
|
|
|
case SLSB_P_INPUT_NOT_INIT:
|
|
case SLSB_P_INPUT_PROCESSING:
|
|
QDIO_DBF_TEXT5(0,trace,"inpnipro");
|
|
break;
|
|
|
|
/* P_ERROR means frontier is reached, break and report error */
|
|
case SLSB_P_INPUT_ERROR:
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
sprintf(dbf_text,"inperr%2x",f_mod_no);
|
|
QDIO_DBF_TEXT3(1,trace,dbf_text);
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
|
|
|
|
/* kind of process the buffer */
|
|
set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
|
|
|
|
if (q->qdio_error)
|
|
q->error_status_flags|=
|
|
QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
|
|
q->qdio_error=SLSB_P_INPUT_ERROR;
|
|
q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
|
|
|
|
/* we increment the frontier, as this buffer
|
|
* was processed obviously */
|
|
f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
|
|
atomic_dec(&q->number_of_buffers_used);
|
|
|
|
#ifdef QDIO_USE_PROCESSING_STATE
|
|
last_position=-1;
|
|
#endif /* QDIO_USE_PROCESSING_STATE */
|
|
|
|
break;
|
|
|
|
/* everything else means frontier not changed (HALTED or so) */
|
|
default:
|
|
break;
|
|
}
|
|
out:
|
|
q->first_to_check=f_mod_no;
|
|
|
|
#ifdef QDIO_USE_PROCESSING_STATE
|
|
if (last_position>=0)
|
|
set_slsb(q, &last_position, SLSB_P_INPUT_PROCESSING, &count);
|
|
#endif /* QDIO_USE_PROCESSING_STATE */
|
|
|
|
QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
|
|
|
|
return q->first_to_check;
|
|
}
|
|
|
|
static inline int
|
|
qdio_has_inbound_q_moved(struct qdio_q *q)
|
|
{
|
|
int i;
|
|
|
|
static int old_pcis=0;
|
|
static int old_thinints=0;
|
|
|
|
if (qdio_performance_stats) {
|
|
if ((old_pcis==perf_stats.pcis)&&
|
|
(old_thinints==perf_stats.thinints))
|
|
perf_stats.start_time_inbound=NOW;
|
|
else
|
|
old_pcis=perf_stats.pcis;
|
|
}
|
|
|
|
i=qdio_get_inbound_buffer_frontier(q);
|
|
if ( (i!=GET_SAVED_FRONTIER(q)) ||
|
|
(q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
|
|
SAVE_FRONTIER(q,i);
|
|
if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis))
|
|
SAVE_TIMESTAMP(q);
|
|
|
|
QDIO_DBF_TEXT4(0,trace,"inhasmvd");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
return 1;
|
|
} else {
|
|
QDIO_DBF_TEXT4(0,trace,"inhsntmv");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* means, no more buffers to be filled */
|
|
static inline int
|
|
tiqdio_is_inbound_q_done(struct qdio_q *q)
|
|
{
|
|
int no_used;
|
|
unsigned int start_buf, count;
|
|
unsigned char state = 0;
|
|
struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
|
|
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
char dbf_text[15];
|
|
#endif
|
|
|
|
no_used=atomic_read(&q->number_of_buffers_used);
|
|
|
|
/* propagate the change from 82 to 80 through VM */
|
|
SYNC_MEMORY;
|
|
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
if (no_used) {
|
|
sprintf(dbf_text,"iqisnt%02x",no_used);
|
|
QDIO_DBF_TEXT4(0,trace,dbf_text);
|
|
} else {
|
|
QDIO_DBF_TEXT4(0,trace,"iniqisdo");
|
|
}
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
|
|
if (!no_used)
|
|
return 1;
|
|
if (!q->siga_sync && !irq->is_qebsm)
|
|
/* we'll check for more primed buffers in qeth_stop_polling */
|
|
return 0;
|
|
if (irq->is_qebsm) {
|
|
count = 1;
|
|
start_buf = q->first_to_check;
|
|
qdio_do_eqbs(q, &state, &start_buf, &count);
|
|
} else
|
|
state = q->slsb.acc.val[q->first_to_check];
|
|
if (state != SLSB_P_INPUT_PRIMED)
|
|
/*
|
|
* nothing more to do, if next buffer is not PRIMED.
|
|
* note that we did a SYNC_MEMORY before, that there
|
|
* has been a sychnronization.
|
|
* we will return 0 below, as there is nothing to do
|
|
* (stop_polling not necessary, as we have not been
|
|
* using the PROCESSING state
|
|
*/
|
|
return 0;
|
|
|
|
/*
|
|
* ok, the next input buffer is primed. that means, that device state
|
|
* change indicator and adapter local summary are set, so we will find
|
|
* it next time.
|
|
* we will return 0 below, as there is nothing to do, except scheduling
|
|
* ourselves for the next time.
|
|
*/
|
|
tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
|
|
tiqdio_sched_tl();
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
qdio_is_inbound_q_done(struct qdio_q *q)
|
|
{
|
|
int no_used;
|
|
unsigned int start_buf, count;
|
|
unsigned char state = 0;
|
|
struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
|
|
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
char dbf_text[15];
|
|
#endif
|
|
|
|
no_used=atomic_read(&q->number_of_buffers_used);
|
|
|
|
/*
|
|
* we need that one for synchronization with the adapter, as it
|
|
* does a kind of PCI avoidance
|
|
*/
|
|
SYNC_MEMORY;
|
|
|
|
if (!no_used) {
|
|
QDIO_DBF_TEXT4(0,trace,"inqisdnA");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
QDIO_DBF_TEXT4(0,trace,dbf_text);
|
|
return 1;
|
|
}
|
|
if (irq->is_qebsm) {
|
|
count = 1;
|
|
start_buf = q->first_to_check;
|
|
qdio_do_eqbs(q, &state, &start_buf, &count);
|
|
} else
|
|
state = q->slsb.acc.val[q->first_to_check];
|
|
if (state == SLSB_P_INPUT_PRIMED) {
|
|
/* we got something to do */
|
|
QDIO_DBF_TEXT4(0,trace,"inqisntA");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
return 0;
|
|
}
|
|
|
|
/* on VM, we don't poll, so the q is always done here */
|
|
if (q->siga_sync)
|
|
return 1;
|
|
if (q->hydra_gives_outbound_pcis)
|
|
return 1;
|
|
|
|
/*
|
|
* at this point we know, that inbound first_to_check
|
|
* has (probably) not moved (see qdio_inbound_processing)
|
|
*/
|
|
if (NOW>GET_SAVED_TIMESTAMP(q)+q->timing.threshold) {
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
QDIO_DBF_TEXT4(0,trace,"inqisdon");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
|
|
QDIO_DBF_TEXT4(0,trace,dbf_text);
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
return 1;
|
|
} else {
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
QDIO_DBF_TEXT4(0,trace,"inqisntd");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
|
|
QDIO_DBF_TEXT4(0,trace,dbf_text);
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
qdio_kick_inbound_handler(struct qdio_q *q)
|
|
{
|
|
int count, start, end, real_end, i;
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
char dbf_text[15];
|
|
#endif
|
|
|
|
QDIO_DBF_TEXT4(0,trace,"kickinh");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
|
|
start=q->first_element_to_kick;
|
|
real_end=q->first_to_check;
|
|
end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&(QDIO_MAX_BUFFERS_PER_Q-1);
|
|
|
|
i=start;
|
|
count=0;
|
|
while (1) {
|
|
count++;
|
|
if (i==end)
|
|
break;
|
|
i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
|
|
}
|
|
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
sprintf(dbf_text,"s=%2xc=%2x",start,count);
|
|
QDIO_DBF_TEXT4(0,trace,dbf_text);
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
|
|
if (likely(q->state==QDIO_IRQ_STATE_ACTIVE))
|
|
q->handler(q->cdev,
|
|
QDIO_STATUS_INBOUND_INT|q->error_status_flags,
|
|
q->qdio_error,q->siga_error,q->q_no,start,count,
|
|
q->int_parm);
|
|
|
|
/* for the next time: */
|
|
q->first_element_to_kick=real_end;
|
|
q->qdio_error=0;
|
|
q->siga_error=0;
|
|
q->error_status_flags=0;
|
|
|
|
if (qdio_performance_stats) {
|
|
perf_stats.inbound_time+=NOW-perf_stats.start_time_inbound;
|
|
perf_stats.inbound_cnt++;
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
__tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
|
|
{
|
|
struct qdio_irq *irq_ptr;
|
|
struct qdio_q *oq;
|
|
int i;
|
|
|
|
QDIO_DBF_TEXT4(0,trace,"iqinproc");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
|
|
/*
|
|
* we first want to reserve the q, so that we know, that we don't
|
|
* interrupt ourselves and call qdio_unmark_q, as is_in_shutdown might
|
|
* be set
|
|
*/
|
|
if (unlikely(qdio_reserve_q(q))) {
|
|
qdio_release_q(q);
|
|
if (qdio_performance_stats)
|
|
ii_p_c++;
|
|
/*
|
|
* as we might just be about to stop polling, we make
|
|
* sure that we check again at least once more
|
|
*/
|
|
tiqdio_sched_tl();
|
|
return;
|
|
}
|
|
if (qdio_performance_stats)
|
|
ii_p_nc++;
|
|
if (unlikely(atomic_read(&q->is_in_shutdown))) {
|
|
qdio_unmark_q(q);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* we reset spare_ind_was_set, when the queue does not use the
|
|
* spare indicator
|
|
*/
|
|
if (spare_ind_was_set)
|
|
spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator);
|
|
|
|
if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set)
|
|
goto out;
|
|
/*
|
|
* q->dev_st_chg_ind is the indicator, be it shared or not.
|
|
* only clear it, if indicator is non-shared
|
|
*/
|
|
if (!spare_ind_was_set)
|
|
tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);
|
|
|
|
if (q->hydra_gives_outbound_pcis) {
|
|
if (!q->siga_sync_done_on_thinints) {
|
|
SYNC_MEMORY_ALL;
|
|
} else if ((!q->siga_sync_done_on_outb_tis)&&
|
|
(q->hydra_gives_outbound_pcis)) {
|
|
SYNC_MEMORY_ALL_OUTB;
|
|
}
|
|
} else {
|
|
SYNC_MEMORY;
|
|
}
|
|
/*
|
|
* maybe we have to do work on our outbound queues... at least
|
|
* we have to check the outbound-int-capable thinint-capable
|
|
* queues
|
|
*/
|
|
if (q->hydra_gives_outbound_pcis) {
|
|
irq_ptr = (struct qdio_irq*)q->irq_ptr;
|
|
for (i=0;i<irq_ptr->no_output_qs;i++) {
|
|
oq = irq_ptr->output_qs[i];
|
|
if (!qdio_is_outbound_q_done(oq)) {
|
|
if (qdio_performance_stats)
|
|
perf_stats.tl_runs--;
|
|
__qdio_outbound_processing(oq);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!qdio_has_inbound_q_moved(q))
|
|
goto out;
|
|
|
|
qdio_kick_inbound_handler(q);
|
|
if (tiqdio_is_inbound_q_done(q))
|
|
if (!qdio_stop_polling(q)) {
|
|
/*
|
|
* we set the flags to get into the stuff next time,
|
|
* see also comment in qdio_stop_polling
|
|
*/
|
|
tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
|
|
tiqdio_sched_tl();
|
|
}
|
|
out:
|
|
qdio_release_q(q);
|
|
}
|
|
|
|
static void
|
|
tiqdio_inbound_processing(struct qdio_q *q)
|
|
{
|
|
__tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount));
|
|
}
|
|
|
|
static inline void
|
|
__qdio_inbound_processing(struct qdio_q *q)
|
|
{
|
|
int q_laps=0;
|
|
|
|
QDIO_DBF_TEXT4(0,trace,"qinproc");
|
|
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
|
|
|
|
if (unlikely(qdio_reserve_q(q))) {
|
|
qdio_release_q(q);
|
|
if (qdio_performance_stats)
|
|
i_p_c++;
|
|
/* as we're sissies, we'll check next time */
|
|
if (likely(!atomic_read(&q->is_in_shutdown))) {
|
|
qdio_mark_q(q);
|
|
QDIO_DBF_TEXT4(0,trace,"busy,agn");
|
|
}
|
|
return;
|
|
}
|
|
if (qdio_performance_stats) {
|
|
i_p_nc++;
|
|
perf_stats.tl_runs++;
|
|
}
|
|
|
|
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(struct qdio_q *q)
|
|
{
|
|
__qdio_inbound_processing(q);
|
|
}
|
|
|
|
/************************* MAIN ROUTINES *******************************/
|
|
|
|
#ifdef QDIO_USE_PROCESSING_STATE
|
|
static inline int
|
|
tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
|
|
{
|
|
if (!q) {
|
|
tiqdio_sched_tl();
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* under VM, we have not used the PROCESSING state, so no
|
|
* need to stop polling
|
|
*/
|
|
if (q->siga_sync)
|
|
return 2;
|
|
|
|
if (unlikely(qdio_reserve_q(q))) {
|
|
qdio_release_q(q);
|
|
if (qdio_performance_stats)
|
|
ii_p_c++;
|
|
/*
|
|
* 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();
|
|
return 0;
|
|
}
|
|
if (qdio_stop_polling(q)) {
|
|
qdio_release_q(q);
|
|
return 2;
|
|
}
|
|
if (q_laps<QDIO_Q_LAPS-1) {
|
|
qdio_release_q(q);
|
|
return 3;
|
|
}
|
|
/*
|
|
* 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);
|
|
return 1;
|
|
|
|
}
|
|
#endif /* QDIO_USE_PROCESSING_STATE */
|
|
|
|
static inline void
|
|
tiqdio_inbound_checks(void)
|
|
{
|
|
struct qdio_q *q;
|
|
int spare_ind_was_set=0;
|
|
#ifdef QDIO_USE_PROCESSING_STATE
|
|
int q_laps=0;
|
|
#endif /* QDIO_USE_PROCESSING_STATE */
|
|
|
|
QDIO_DBF_TEXT4(0,trace,"iqdinbck");
|
|
QDIO_DBF_TEXT5(0,trace,"iqlocsum");
|
|
|
|
#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=(struct qdio_q*)tiq_list;
|
|
do {
|
|
if (!q)
|
|
break;
|
|
__tiqdio_inbound_processing(q, spare_ind_was_set);
|
|
q=(struct qdio_q*)q->list_next;
|
|
} while (q!=(struct qdio_q*)tiq_list);
|
|
|
|
#ifdef QDIO_USE_PROCESSING_STATE
|
|
q=(struct qdio_q*)tiq_list;
|
|
do {
|
|
int ret;
|
|
|
|
ret = tiqdio_reset_processing_state(q, q_laps);
|
|
switch (ret) {
|
|
case 0:
|
|
return;
|
|
case 1:
|
|
q_laps++;
|
|
case 2:
|
|
q = (struct qdio_q*)q->list_next;
|
|
break;
|
|
default:
|
|
q_laps++;
|
|
goto again;
|
|
}
|
|
} while (q!=(struct qdio_q*)tiq_list);
|
|
#endif /* QDIO_USE_PROCESSING_STATE */
|
|
}
|
|
|
|
static void
|
|
tiqdio_tl(unsigned long data)
|
|
{
|
|
QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
|
|
|
|
if (qdio_performance_stats)
|
|
perf_stats.tl_runs++;
|
|
|
|
tiqdio_inbound_checks();
|
|
}
|
|
|
|
/********************* GENERAL HELPER_ROUTINES ***********************/
|
|
|
|
static void
|
|
qdio_release_irq_memory(struct qdio_irq *irq_ptr)
|
|
{
|
|
int i;
|
|
|
|
for (i=0;i<QDIO_MAX_QUEUES_PER_IRQ;i++) {
|
|
if (!irq_ptr->input_qs[i])
|
|
goto next;
|
|
|
|
kfree(irq_ptr->input_qs[i]->slib);
|
|
kfree(irq_ptr->input_qs[i]);
|
|
|
|
next:
|
|
if (!irq_ptr->output_qs[i])
|
|
continue;
|
|
|
|
kfree(irq_ptr->output_qs[i]->slib);
|
|
kfree(irq_ptr->output_qs[i]);
|
|
|
|
}
|
|
kfree(irq_ptr->qdr);
|
|
free_page((unsigned long) irq_ptr);
|
|
}
|
|
|
|
static void
|
|
qdio_set_impl_params(struct qdio_irq *irq_ptr,
|
|
unsigned int qib_param_field_format,
|
|
/* pointer to 128 bytes or NULL, if no param field */
|
|
unsigned char *qib_param_field,
|
|
/* pointer to no_queues*128 words of data or NULL */
|
|
unsigned int no_input_qs,
|
|
unsigned int no_output_qs,
|
|
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(struct qdio_irq *irq_ptr,
|
|
int no_input_qs, int no_output_qs)
|
|
{
|
|
int i;
|
|
struct qdio_q *q;
|
|
int result=-ENOMEM;
|
|
|
|
for (i=0;i<no_input_qs;i++) {
|
|
q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
|
|
|
|
if (!q) {
|
|
QDIO_PRINT_ERR("kmalloc of q failed!\n");
|
|
goto out;
|
|
}
|
|
|
|
q->slib = kmalloc(PAGE_SIZE, GFP_KERNEL);
|
|
if (!q->slib) {
|
|
QDIO_PRINT_ERR("kmalloc of slib failed!\n");
|
|
goto out;
|
|
}
|
|
|
|
irq_ptr->input_qs[i]=q;
|
|
}
|
|
|
|
for (i=0;i<no_output_qs;i++) {
|
|
q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
|
|
|
|
if (!q) {
|
|
goto out;
|
|
}
|
|
|
|
q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
|
|
if (!q->slib) {
|
|
QDIO_PRINT_ERR("kmalloc of slib failed!\n");
|
|
goto out;
|
|
}
|
|
|
|
irq_ptr->output_qs[i]=q;
|
|
}
|
|
|
|
result=0;
|
|
out:
|
|
return result;
|
|
}
|
|
|
|
static void
|
|
qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
|
|
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)
|
|
{
|
|
struct qdio_q *q;
|
|
int i,j;
|
|
char dbf_text[20]; /* see qdio_initialize */
|
|
void *ptr;
|
|
int available;
|
|
|
|
sprintf(dbf_text,"qfqs%4x",cdev->private->schid.sch_no);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
for (i=0;i<no_input_qs;i++) {
|
|
q=irq_ptr->input_qs[i];
|
|
|
|
memset(q,0,((char*)&q->slib)-((char*)q));
|
|
sprintf(dbf_text,"in-q%4x",i);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
|
|
|
|
memset(q->slib,0,PAGE_SIZE);
|
|
q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
|
|
|
|
available=0;
|
|
|
|
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
|
|
q->sbal[j]=*(inbound_sbals_array++);
|
|
|
|
q->queue_type=q_format;
|
|
q->int_parm=int_parm;
|
|
q->schid = irq_ptr->schid;
|
|
q->irq_ptr = irq_ptr;
|
|
q->cdev = cdev;
|
|
q->mask=1<<(31-i);
|
|
q->q_no=i;
|
|
q->is_input_q=1;
|
|
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=
|
|
(unsigned long)(q->slib);
|
|
q->slib->sla=(unsigned long)(q->sl);
|
|
q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
|
|
|
|
/* fill in sl */
|
|
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
|
|
q->sl->element[j].sbal=(unsigned long)(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 */
|
|
if (!irq_ptr->is_qebsm) {
|
|
unsigned int count = 1;
|
|
for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
|
|
set_slsb(q, &j, SLSB_P_INPUT_NOT_INIT, &count);
|
|
}
|
|
}
|
|
|
|
for (i=0;i<no_output_qs;i++) {
|
|
q=irq_ptr->output_qs[i];
|
|
memset(q,0,((char*)&q->slib)-((char*)q));
|
|
|
|
sprintf(dbf_text,"outq%4x",i);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
|
|
|
|
memset(q->slib,0,PAGE_SIZE);
|
|
q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
|
|
|
|
available=0;
|
|
|
|
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
|
|
q->sbal[j]=*(outbound_sbals_array++);
|
|
|
|
q->queue_type=q_format;
|
|
q->int_parm=int_parm;
|
|
q->is_input_q=0;
|
|
q->schid = irq_ptr->schid;
|
|
q->cdev = cdev;
|
|
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=
|
|
(unsigned long)(q->slib);
|
|
q->slib->sla=(unsigned long)(q->sl);
|
|
q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
|
|
|
|
/* fill in sl */
|
|
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
|
|
q->sl->element[j].sbal=(unsigned long)(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 */
|
|
if (!irq_ptr->is_qebsm) {
|
|
unsigned int count = 1;
|
|
for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
|
|
set_slsb(q, &j, SLSB_P_OUTPUT_NOT_INIT, &count);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
qdio_fill_thresholds(struct qdio_irq *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;
|
|
struct qdio_q *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(void)
|
|
{
|
|
QDIO_DBF_TEXT4(0,trace,"thin_int");
|
|
|
|
if (qdio_performance_stats) {
|
|
perf_stats.thinints++;
|
|
perf_stats.start_time_inbound=NOW;
|
|
}
|
|
|
|
/* 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(struct qdio_irq *irq_ptr, enum qdio_irq_states state)
|
|
{
|
|
int i;
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
char dbf_text[15];
|
|
|
|
QDIO_DBF_TEXT5(0,trace,"newstate");
|
|
sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
|
|
QDIO_DBF_TEXT5(0,trace,dbf_text);
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
|
|
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 inline void
|
|
qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
|
|
{
|
|
char dbf_text[15];
|
|
|
|
if (irb->esw.esw0.erw.cons) {
|
|
sprintf(dbf_text,"sens%4x",schid.sch_no);
|
|
QDIO_DBF_TEXT2(1,trace,dbf_text);
|
|
QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN);
|
|
|
|
QDIO_PRINT_WARN("sense data available on qdio channel.\n");
|
|
QDIO_HEXDUMP16(WARN,"irb: ",irb);
|
|
QDIO_HEXDUMP16(WARN,"sense data: ",irb->ecw);
|
|
}
|
|
|
|
}
|
|
|
|
static inline void
|
|
qdio_handle_pci(struct qdio_irq *irq_ptr)
|
|
{
|
|
int i;
|
|
struct qdio_q *q;
|
|
|
|
if (qdio_performance_stats) {
|
|
perf_stats.pcis++;
|
|
perf_stats.start_time_inbound=NOW;
|
|
}
|
|
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 {
|
|
if (qdio_performance_stats)
|
|
perf_stats.tl_runs--;
|
|
__qdio_inbound_processing(q);
|
|
}
|
|
}
|
|
if (!irq_ptr->hydra_gives_outbound_pcis)
|
|
return;
|
|
for (i=0;i<irq_ptr->no_output_qs;i++) {
|
|
q=irq_ptr->output_qs[i];
|
|
if (qdio_is_outbound_q_done(q))
|
|
continue;
|
|
if (qdio_performance_stats)
|
|
perf_stats.tl_runs--;
|
|
if (!irq_ptr->sync_done_on_outb_pcis)
|
|
SYNC_MEMORY;
|
|
__qdio_outbound_processing(q);
|
|
}
|
|
}
|
|
|
|
static void qdio_establish_handle_irq(struct ccw_device*, int, int);
|
|
|
|
static inline void
|
|
qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm,
|
|
int cstat, int dstat)
|
|
{
|
|
struct qdio_irq *irq_ptr;
|
|
struct qdio_q *q;
|
|
char dbf_text[15];
|
|
|
|
irq_ptr = cdev->private->qdio_data;
|
|
|
|
QDIO_DBF_TEXT2(1, trace, "ick2");
|
|
sprintf(dbf_text,"%s", cdev->dev.bus_id);
|
|
QDIO_DBF_TEXT2(1,trace,dbf_text);
|
|
QDIO_DBF_HEX2(0,trace,&intparm,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 device %s (cs=x%x, ds=x%x).\n",
|
|
cdev->dev.bus_id, 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 for device %s!?\n",
|
|
cdev->dev.bus_id);
|
|
goto omit_handler_call;
|
|
}
|
|
q->handler(q->cdev,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);
|
|
|
|
}
|
|
|
|
static void
|
|
qdio_call_shutdown(struct work_struct *work)
|
|
{
|
|
struct ccw_device_private *priv;
|
|
struct ccw_device *cdev;
|
|
|
|
priv = container_of(work, struct ccw_device_private, kick_work);
|
|
cdev = priv->cdev;
|
|
qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
|
|
put_device(&cdev->dev);
|
|
}
|
|
|
|
static void
|
|
qdio_timeout_handler(struct ccw_device *cdev)
|
|
{
|
|
struct qdio_irq *irq_ptr;
|
|
char dbf_text[15];
|
|
|
|
QDIO_DBF_TEXT2(0, trace, "qtoh");
|
|
sprintf(dbf_text, "%s", cdev->dev.bus_id);
|
|
QDIO_DBF_TEXT2(0, trace, dbf_text);
|
|
|
|
irq_ptr = cdev->private->qdio_data;
|
|
sprintf(dbf_text, "state:%d", irq_ptr->state);
|
|
QDIO_DBF_TEXT2(0, trace, dbf_text);
|
|
|
|
switch (irq_ptr->state) {
|
|
case QDIO_IRQ_STATE_INACTIVE:
|
|
QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
|
|
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
|
|
QDIO_DBF_TEXT2(1,setup,"eq:timeo");
|
|
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
|
|
break;
|
|
case QDIO_IRQ_STATE_CLEANUP:
|
|
QDIO_PRINT_INFO("Did not get interrupt on cleanup, "
|
|
"irq=0.%x.%x.\n",
|
|
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
|
|
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
|
|
break;
|
|
case QDIO_IRQ_STATE_ESTABLISHED:
|
|
case QDIO_IRQ_STATE_ACTIVE:
|
|
/* I/O has been terminated by common I/O layer. */
|
|
QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
|
|
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
|
|
QDIO_DBF_TEXT2(1, trace, "cio:term");
|
|
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
|
|
if (get_device(&cdev->dev)) {
|
|
/* Can't call shutdown from interrupt context. */
|
|
PREPARE_WORK(&cdev->private->kick_work,
|
|
qdio_call_shutdown);
|
|
queue_work(ccw_device_work, &cdev->private->kick_work);
|
|
}
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
ccw_device_set_timeout(cdev, 0);
|
|
wake_up(&cdev->private->wait_q);
|
|
}
|
|
|
|
static void
|
|
qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
|
|
{
|
|
struct qdio_irq *irq_ptr;
|
|
int cstat,dstat;
|
|
char dbf_text[15];
|
|
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
QDIO_DBF_TEXT4(0, trace, "qint");
|
|
sprintf(dbf_text, "%s", cdev->dev.bus_id);
|
|
QDIO_DBF_TEXT4(0, trace, dbf_text);
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
|
|
if (!intparm) {
|
|
QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \
|
|
"handler, device %s\n", cdev->dev.bus_id);
|
|
return;
|
|
}
|
|
|
|
irq_ptr = cdev->private->qdio_data;
|
|
if (!irq_ptr) {
|
|
QDIO_DBF_TEXT2(1, trace, "uint");
|
|
sprintf(dbf_text,"%s", cdev->dev.bus_id);
|
|
QDIO_DBF_TEXT2(1,trace,dbf_text);
|
|
QDIO_PRINT_ERR("received interrupt on unused device %s!\n",
|
|
cdev->dev.bus_id);
|
|
return;
|
|
}
|
|
|
|
if (IS_ERR(irb)) {
|
|
/* Currently running i/o is in error. */
|
|
switch (PTR_ERR(irb)) {
|
|
case -EIO:
|
|
QDIO_PRINT_ERR("i/o error on device %s\n",
|
|
cdev->dev.bus_id);
|
|
return;
|
|
case -ETIMEDOUT:
|
|
qdio_timeout_handler(cdev);
|
|
return;
|
|
default:
|
|
QDIO_PRINT_ERR("unknown error state %ld on device %s\n",
|
|
PTR_ERR(irb), cdev->dev.bus_id);
|
|
return;
|
|
}
|
|
}
|
|
|
|
qdio_irq_check_sense(irq_ptr->schid, irb);
|
|
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
sprintf(dbf_text, "state:%d", irq_ptr->state);
|
|
QDIO_DBF_TEXT4(0, trace, dbf_text);
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
|
|
cstat = irb->scsw.cstat;
|
|
dstat = irb->scsw.dstat;
|
|
|
|
switch (irq_ptr->state) {
|
|
case QDIO_IRQ_STATE_INACTIVE:
|
|
qdio_establish_handle_irq(cdev, cstat, dstat);
|
|
break;
|
|
|
|
case QDIO_IRQ_STATE_CLEANUP:
|
|
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
|
|
break;
|
|
|
|
case QDIO_IRQ_STATE_ESTABLISHED:
|
|
case QDIO_IRQ_STATE_ACTIVE:
|
|
if (cstat & SCHN_STAT_PCI) {
|
|
qdio_handle_pci(irq_ptr);
|
|
break;
|
|
}
|
|
|
|
if ((cstat&~SCHN_STAT_PCI)||dstat) {
|
|
qdio_handle_activate_check(cdev, intparm, cstat, dstat);
|
|
break;
|
|
}
|
|
default:
|
|
QDIO_PRINT_ERR("got interrupt for queues in state %d on " \
|
|
"device %s?!\n",
|
|
irq_ptr->state, cdev->dev.bus_id);
|
|
}
|
|
wake_up(&cdev->private->wait_q);
|
|
|
|
}
|
|
|
|
int
|
|
qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
|
|
unsigned int queue_number)
|
|
{
|
|
int cc = 0;
|
|
struct qdio_q *q;
|
|
struct qdio_irq *irq_ptr;
|
|
void *ptr;
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
char dbf_text[15]="SyncXXXX";
|
|
#endif
|
|
|
|
irq_ptr = cdev->private->qdio_data;
|
|
if (!irq_ptr)
|
|
return -ENODEV;
|
|
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
*((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
|
|
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);
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
|
|
if (flags&QDIO_FLAG_SYNC_INPUT) {
|
|
q=irq_ptr->input_qs[queue_number];
|
|
if (!q)
|
|
return -EINVAL;
|
|
if (!(irq_ptr->is_qebsm))
|
|
cc = do_siga_sync(q->schid, 0, q->mask);
|
|
} else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
|
|
q=irq_ptr->output_qs[queue_number];
|
|
if (!q)
|
|
return -EINVAL;
|
|
if (!(irq_ptr->is_qebsm))
|
|
cc = do_siga_sync(q->schid, q->mask, 0);
|
|
} else
|
|
return -EINVAL;
|
|
|
|
ptr=&cc;
|
|
if (cc)
|
|
QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));
|
|
|
|
return cc;
|
|
}
|
|
|
|
static inline void
|
|
qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
|
|
unsigned long token)
|
|
{
|
|
struct qdio_q *q;
|
|
int i;
|
|
unsigned int count, start_buf;
|
|
char dbf_text[15];
|
|
|
|
/*check if QEBSM is disabled */
|
|
if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
|
|
irq_ptr->is_qebsm = 0;
|
|
irq_ptr->sch_token = 0;
|
|
irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
|
|
QDIO_DBF_TEXT0(0,setup,"noV=V");
|
|
return;
|
|
}
|
|
irq_ptr->sch_token = token;
|
|
/*input queue*/
|
|
for (i = 0; i < irq_ptr->no_input_qs;i++) {
|
|
q = irq_ptr->input_qs[i];
|
|
count = QDIO_MAX_BUFFERS_PER_Q;
|
|
start_buf = 0;
|
|
set_slsb(q, &start_buf, SLSB_P_INPUT_NOT_INIT, &count);
|
|
}
|
|
sprintf(dbf_text,"V=V:%2x",irq_ptr->is_qebsm);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
sprintf(dbf_text,"%8lx",irq_ptr->sch_token);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
/*output queue*/
|
|
for (i = 0; i < irq_ptr->no_output_qs; i++) {
|
|
q = irq_ptr->output_qs[i];
|
|
count = QDIO_MAX_BUFFERS_PER_Q;
|
|
start_buf = 0;
|
|
set_slsb(q, &start_buf, SLSB_P_OUTPUT_NOT_INIT, &count);
|
|
}
|
|
}
|
|
|
|
static void
|
|
qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
|
|
{
|
|
int result;
|
|
unsigned char qdioac;
|
|
struct {
|
|
struct chsc_header request;
|
|
u16 reserved1:10;
|
|
u16 ssid:2;
|
|
u16 fmt:4;
|
|
u16 first_sch;
|
|
u16 reserved2;
|
|
u16 last_sch;
|
|
u32 reserved3;
|
|
struct chsc_header response;
|
|
u32 reserved4;
|
|
u8 flags;
|
|
u8 reserved5;
|
|
u16 sch;
|
|
u8 qfmt;
|
|
u8 parm;
|
|
u8 qdioac1;
|
|
u8 sch_class;
|
|
u8 reserved7;
|
|
u8 icnt;
|
|
u8 reserved8;
|
|
u8 ocnt;
|
|
u8 reserved9;
|
|
u8 mbccnt;
|
|
u16 qdioac2;
|
|
u64 sch_token;
|
|
} *ssqd_area;
|
|
|
|
QDIO_DBF_TEXT0(0,setup,"getssqd");
|
|
qdioac = 0;
|
|
ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
|
|
if (!ssqd_area) {
|
|
QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
|
|
"SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
|
|
irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
|
|
CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
|
|
CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
|
|
irq_ptr->is_qebsm = 0;
|
|
irq_ptr->sch_token = 0;
|
|
irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
|
|
return;
|
|
}
|
|
|
|
ssqd_area->request = (struct chsc_header) {
|
|
.length = 0x0010,
|
|
.code = 0x0024,
|
|
};
|
|
ssqd_area->first_sch = irq_ptr->schid.sch_no;
|
|
ssqd_area->last_sch = irq_ptr->schid.sch_no;
|
|
ssqd_area->ssid = irq_ptr->schid.ssid;
|
|
result = chsc(ssqd_area);
|
|
|
|
if (result) {
|
|
QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
|
|
"SIGAs for sch 0.%x.%x.\n", result,
|
|
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
|
|
qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
|
|
CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
|
|
CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
|
|
irq_ptr->is_qebsm = 0;
|
|
goto out;
|
|
}
|
|
|
|
if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
|
|
QDIO_PRINT_WARN("response upon checking SIGA needs " \
|
|
"is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
|
|
ssqd_area->response.code,
|
|
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
|
|
qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
|
|
CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
|
|
CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
|
|
irq_ptr->is_qebsm = 0;
|
|
goto out;
|
|
}
|
|
if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
|
|
!(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
|
|
(ssqd_area->sch != irq_ptr->schid.sch_no)) {
|
|
QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
|
|
"using all SIGAs.\n",
|
|
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
|
|
qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
|
|
CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
|
|
CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
|
|
irq_ptr->is_qebsm = 0;
|
|
goto out;
|
|
}
|
|
qdioac = ssqd_area->qdioac1;
|
|
out:
|
|
qdio_check_subchannel_qebsm(irq_ptr, qdioac,
|
|
ssqd_area->sch_token);
|
|
mempool_free(ssqd_area, qdio_mempool_scssc);
|
|
irq_ptr->qdioac = qdioac;
|
|
}
|
|
|
|
static unsigned int
|
|
tiqdio_check_chsc_availability(void)
|
|
{
|
|
char dbf_text[15];
|
|
|
|
if (!css_characteristics_avail)
|
|
return -EIO;
|
|
|
|
/* Check for bit 41. */
|
|
if (!css_general_characteristics.aif) {
|
|
QDIO_PRINT_WARN("Adapter interruption facility not " \
|
|
"installed.\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* Check for bits 107 and 108. */
|
|
if (!css_chsc_characteristics.scssc ||
|
|
!css_chsc_characteristics.scsscf) {
|
|
QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
|
|
"not available.\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* Check for OSA/FCP thin interrupts (bit 67). */
|
|
hydra_thinints = css_general_characteristics.aif_osa;
|
|
sprintf(dbf_text,"hydrati%1x", hydra_thinints);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
|
|
#ifdef CONFIG_64BIT
|
|
/* Check for QEBSM support in general (bit 58). */
|
|
is_passthrough = css_general_characteristics.qebsm;
|
|
#endif
|
|
sprintf(dbf_text,"cssQBS:%1x", is_passthrough);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
|
|
/* Check for aif time delay disablement fac (bit 56). If installed,
|
|
* omit svs even under lpar (good point by rick again) */
|
|
omit_svs = css_general_characteristics.aif_tdd;
|
|
sprintf(dbf_text,"omitsvs%1x", omit_svs);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static unsigned int
|
|
tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
|
|
{
|
|
unsigned long real_addr_local_summary_bit;
|
|
unsigned long real_addr_dev_st_chg_ind;
|
|
void *ptr;
|
|
char dbf_text[15];
|
|
|
|
unsigned int resp_code;
|
|
int result;
|
|
|
|
struct {
|
|
struct chsc_header request;
|
|
u16 operation_code;
|
|
u16 reserved1;
|
|
u32 reserved2;
|
|
u32 reserved3;
|
|
u64 summary_indicator_addr;
|
|
u64 subchannel_indicator_addr;
|
|
u32 ks:4;
|
|
u32 kc:4;
|
|
u32 reserved4:21;
|
|
u32 isc:3;
|
|
u32 word_with_d_bit;
|
|
/* set to 0x10000000 to enable
|
|
* time delay disablement facility */
|
|
u32 reserved5;
|
|
struct subchannel_id schid;
|
|
u32 reserved6[1004];
|
|
struct chsc_header response;
|
|
u32 reserved7;
|
|
} *scssc_area;
|
|
|
|
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);
|
|
}
|
|
|
|
scssc_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
|
|
if (!scssc_area) {
|
|
QDIO_PRINT_WARN("No memory for setting indicators on " \
|
|
"subchannel 0.%x.%x.\n",
|
|
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
|
|
return -ENOMEM;
|
|
}
|
|
scssc_area->request = (struct chsc_header) {
|
|
.length = 0x0fe0,
|
|
.code = 0x0021,
|
|
};
|
|
scssc_area->operation_code = 0;
|
|
|
|
scssc_area->summary_indicator_addr = real_addr_local_summary_bit;
|
|
scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind;
|
|
scssc_area->ks = QDIO_STORAGE_KEY;
|
|
scssc_area->kc = QDIO_STORAGE_KEY;
|
|
scssc_area->isc = TIQDIO_THININT_ISC;
|
|
scssc_area->schid = irq_ptr->schid;
|
|
/* enables the time delay disablement facility. Don't care
|
|
* whether it is really there (i.e. we haven't checked for
|
|
* it) */
|
|
if (css_general_characteristics.aif_tdd)
|
|
scssc_area->word_with_d_bit = 0x10000000;
|
|
else
|
|
QDIO_PRINT_WARN("Time delay disablement facility " \
|
|
"not available\n");
|
|
|
|
result = chsc(scssc_area);
|
|
if (result) {
|
|
QDIO_PRINT_WARN("could not set indicators on irq 0.%x.%x, " \
|
|
"cc=%i.\n",
|
|
irq_ptr->schid.ssid, irq_ptr->schid.sch_no,result);
|
|
result = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
resp_code = scssc_area->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=&scssc_area->response;
|
|
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:
|
|
mempool_free(scssc_area, qdio_mempool_scssc);
|
|
return result;
|
|
|
|
}
|
|
|
|
static unsigned int
|
|
tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
|
|
{
|
|
unsigned int resp_code;
|
|
int result;
|
|
void *ptr;
|
|
char dbf_text[15];
|
|
|
|
struct {
|
|
struct chsc_header request;
|
|
u16 operation_code;
|
|
u16 reserved1;
|
|
u32 reserved2;
|
|
u32 reserved3;
|
|
u32 reserved4[2];
|
|
u32 delay_target;
|
|
u32 reserved5[1009];
|
|
struct chsc_header response;
|
|
u32 reserved6;
|
|
} *scsscf_area;
|
|
|
|
if (!irq_ptr->is_thinint_irq)
|
|
return -ENODEV;
|
|
|
|
scsscf_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
|
|
if (!scsscf_area) {
|
|
QDIO_PRINT_WARN("No memory for setting delay target on " \
|
|
"subchannel 0.%x.%x.\n",
|
|
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
|
|
return -ENOMEM;
|
|
}
|
|
scsscf_area->request = (struct chsc_header) {
|
|
.length = 0x0fe0,
|
|
.code = 0x1027,
|
|
};
|
|
|
|
scsscf_area->delay_target = delay_target<<16;
|
|
|
|
result=chsc(scsscf_area);
|
|
if (result) {
|
|
QDIO_PRINT_WARN("could not set delay target on irq 0.%x.%x, " \
|
|
"cc=%i. Continuing.\n",
|
|
irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
|
|
result);
|
|
result = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
resp_code = scsscf_area->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=&scsscf_area->response;
|
|
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; /* not critical */
|
|
out:
|
|
mempool_free(scsscf_area, qdio_mempool_scssc);
|
|
return result;
|
|
}
|
|
|
|
int
|
|
qdio_cleanup(struct ccw_device *cdev, int how)
|
|
{
|
|
struct qdio_irq *irq_ptr;
|
|
char dbf_text[15];
|
|
int rc;
|
|
|
|
irq_ptr = cdev->private->qdio_data;
|
|
if (!irq_ptr)
|
|
return -ENODEV;
|
|
|
|
sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
|
|
QDIO_DBF_TEXT1(0,trace,dbf_text);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
|
|
rc = qdio_shutdown(cdev, how);
|
|
if ((rc == 0) || (rc == -EINPROGRESS))
|
|
rc = qdio_free(cdev);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
qdio_shutdown(struct ccw_device *cdev, int how)
|
|
{
|
|
struct qdio_irq *irq_ptr;
|
|
int i;
|
|
int result = 0;
|
|
int rc;
|
|
unsigned long flags;
|
|
int timeout;
|
|
char dbf_text[15];
|
|
|
|
irq_ptr = cdev->private->qdio_data;
|
|
if (!irq_ptr)
|
|
return -ENODEV;
|
|
|
|
down(&irq_ptr->setting_up_sema);
|
|
|
|
sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
|
|
QDIO_DBF_TEXT1(0,trace,dbf_text);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
|
|
/* 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);
|
|
wait_event_interruptible_timeout(cdev->private->wait_q,
|
|
!atomic_read(&irq_ptr->
|
|
input_qs[i]->
|
|
use_count),
|
|
QDIO_NO_USE_COUNT_TIMEOUT);
|
|
if (atomic_read(&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);
|
|
wait_event_interruptible_timeout(cdev->private->wait_q,
|
|
!atomic_read(&irq_ptr->
|
|
output_qs[i]->
|
|
use_count),
|
|
QDIO_NO_USE_COUNT_TIMEOUT);
|
|
if (atomic_read(&irq_ptr->output_qs[i]->use_count))
|
|
result=-EINPROGRESS;
|
|
}
|
|
|
|
/* cleanup subchannel */
|
|
spin_lock_irqsave(get_ccwdev_lock(cdev),flags);
|
|
if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
|
|
rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
|
|
timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
|
|
} else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
|
|
rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
|
|
timeout=QDIO_CLEANUP_HALT_TIMEOUT;
|
|
} else { /* default behaviour */
|
|
rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
|
|
timeout=QDIO_CLEANUP_HALT_TIMEOUT;
|
|
}
|
|
if (rc == -ENODEV) {
|
|
/* No need to wait for device no longer present. */
|
|
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
|
|
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
|
|
} else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) {
|
|
/*
|
|
* Whoever put another handler there, has to cope with the
|
|
* interrupt theirself. Might happen if qdio_shutdown was
|
|
* called on already shutdown queues, but this shouldn't have
|
|
* bad side effects.
|
|
*/
|
|
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
|
|
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
|
|
} else if (rc == 0) {
|
|
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
|
|
ccw_device_set_timeout(cdev, timeout);
|
|
spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags);
|
|
|
|
wait_event(cdev->private->wait_q,
|
|
irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
|
|
irq_ptr->state == QDIO_IRQ_STATE_ERR);
|
|
} else {
|
|
QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for "
|
|
"device %s\n", result, cdev->dev.bus_id);
|
|
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
|
|
result = rc;
|
|
goto out;
|
|
}
|
|
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*)cdev->handler == (void*)qdio_handler)
|
|
cdev->handler=irq_ptr->original_int_handler;
|
|
|
|
/* Ignore errors. */
|
|
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
|
|
ccw_device_set_timeout(cdev, 0);
|
|
out:
|
|
up(&irq_ptr->setting_up_sema);
|
|
return result;
|
|
}
|
|
|
|
int
|
|
qdio_free(struct ccw_device *cdev)
|
|
{
|
|
struct qdio_irq *irq_ptr;
|
|
char dbf_text[15];
|
|
|
|
irq_ptr = cdev->private->qdio_data;
|
|
if (!irq_ptr)
|
|
return -ENODEV;
|
|
|
|
down(&irq_ptr->setting_up_sema);
|
|
|
|
sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
|
|
QDIO_DBF_TEXT1(0,trace,dbf_text);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
|
|
cdev->private->qdio_data = NULL;
|
|
|
|
up(&irq_ptr->setting_up_sema);
|
|
|
|
qdio_release_irq_memory(irq_ptr);
|
|
module_put(THIS_MODULE);
|
|
return 0;
|
|
}
|
|
|
|
static inline void
|
|
qdio_allocate_do_dbf(struct qdio_initialize *init_data)
|
|
{
|
|
char dbf_text[20]; /* if a printf printed out more than 8 chars */
|
|
|
|
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->max_input_threshold);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
sprintf(dbf_text,"miot%4x",init_data->min_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*));
|
|
}
|
|
|
|
static inline void
|
|
qdio_allocate_fill_input_desc(struct qdio_irq *irq_ptr, int i, int iqfmt)
|
|
{
|
|
irq_ptr->input_qs[i]->is_iqdio_q = iqfmt;
|
|
irq_ptr->input_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
|
|
|
|
irq_ptr->qdr->qdf0[i].sliba=(unsigned long)(irq_ptr->input_qs[i]->slib);
|
|
|
|
irq_ptr->qdr->qdf0[i].sla=(unsigned long)(irq_ptr->input_qs[i]->sl);
|
|
|
|
irq_ptr->qdr->qdf0[i].slsba=
|
|
(unsigned long)(&irq_ptr->input_qs[i]->slsb.acc.val[0]);
|
|
|
|
irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_KEY;
|
|
irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_KEY;
|
|
irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_KEY;
|
|
irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_KEY;
|
|
}
|
|
|
|
static inline void
|
|
qdio_allocate_fill_output_desc(struct qdio_irq *irq_ptr, int i,
|
|
int j, int iqfmt)
|
|
{
|
|
irq_ptr->output_qs[i]->is_iqdio_q = iqfmt;
|
|
irq_ptr->output_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
|
|
|
|
irq_ptr->qdr->qdf0[i+j].sliba=(unsigned long)(irq_ptr->output_qs[i]->slib);
|
|
|
|
irq_ptr->qdr->qdf0[i+j].sla=(unsigned long)(irq_ptr->output_qs[i]->sl);
|
|
|
|
irq_ptr->qdr->qdf0[i+j].slsba=
|
|
(unsigned long)(&irq_ptr->output_qs[i]->slsb.acc.val[0]);
|
|
|
|
irq_ptr->qdr->qdf0[i+j].akey=QDIO_STORAGE_KEY;
|
|
irq_ptr->qdr->qdf0[i+j].bkey=QDIO_STORAGE_KEY;
|
|
irq_ptr->qdr->qdf0[i+j].ckey=QDIO_STORAGE_KEY;
|
|
irq_ptr->qdr->qdf0[i+j].dkey=QDIO_STORAGE_KEY;
|
|
}
|
|
|
|
|
|
static inline void
|
|
qdio_initialize_set_siga_flags_input(struct qdio_irq *irq_ptr)
|
|
{
|
|
int i;
|
|
|
|
for (i=0;i<irq_ptr->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));
|
|
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
qdio_initialize_set_siga_flags_output(struct qdio_irq *irq_ptr)
|
|
{
|
|
int i;
|
|
|
|
for (i=0;i<irq_ptr->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));
|
|
|
|
}
|
|
}
|
|
|
|
static inline int
|
|
qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
|
|
int dstat)
|
|
{
|
|
char dbf_text[15];
|
|
struct qdio_irq *irq_ptr;
|
|
|
|
irq_ptr = cdev->private->qdio_data;
|
|
|
|
if (cstat || (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
|
|
sprintf(dbf_text,"ick1%4x",irq_ptr->schid.sch_no);
|
|
QDIO_DBF_TEXT2(1,trace,dbf_text);
|
|
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 0.%x.%x (cs=x%x, ds=x%x).\n",
|
|
irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
|
|
cstat,dstat);
|
|
qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR);
|
|
}
|
|
|
|
if (!(dstat & DEV_STAT_DEV_END)) {
|
|
QDIO_DBF_TEXT2(1,setup,"eq:no de");
|
|
QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
|
|
QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
|
|
QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: didn't get "
|
|
"device end: dstat=%02x, cstat=%02x\n",
|
|
irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
|
|
dstat, cstat);
|
|
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
|
|
return 1;
|
|
}
|
|
|
|
if (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) {
|
|
QDIO_DBF_TEXT2(1,setup,"eq:badio");
|
|
QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
|
|
QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
|
|
QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: got "
|
|
"the following devstat: dstat=%02x, "
|
|
"cstat=%02x\n", irq_ptr->schid.ssid,
|
|
irq_ptr->schid.sch_no, dstat, cstat);
|
|
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, int dstat)
|
|
{
|
|
struct qdio_irq *irq_ptr;
|
|
char dbf_text[15];
|
|
|
|
irq_ptr = cdev->private->qdio_data;
|
|
|
|
sprintf(dbf_text,"qehi%4x",cdev->private->schid.sch_no);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
QDIO_DBF_TEXT0(0,trace,dbf_text);
|
|
|
|
if (qdio_establish_irq_check_for_errors(cdev, cstat, dstat)) {
|
|
ccw_device_set_timeout(cdev, 0);
|
|
return;
|
|
}
|
|
|
|
qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED);
|
|
ccw_device_set_timeout(cdev, 0);
|
|
}
|
|
|
|
int
|
|
qdio_initialize(struct qdio_initialize *init_data)
|
|
{
|
|
int rc;
|
|
char dbf_text[15];
|
|
|
|
sprintf(dbf_text,"qini%4x",init_data->cdev->private->schid.sch_no);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
QDIO_DBF_TEXT0(0,trace,dbf_text);
|
|
|
|
rc = qdio_allocate(init_data);
|
|
if (rc == 0) {
|
|
rc = qdio_establish(init_data);
|
|
if (rc != 0)
|
|
qdio_free(init_data->cdev);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
int
|
|
qdio_allocate(struct qdio_initialize *init_data)
|
|
{
|
|
struct qdio_irq *irq_ptr;
|
|
char dbf_text[15];
|
|
|
|
sprintf(dbf_text,"qalc%4x",init_data->cdev->private->schid.sch_no);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
QDIO_DBF_TEXT0(0,trace,dbf_text);
|
|
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)) )
|
|
return -EINVAL;
|
|
|
|
if (!init_data->input_sbal_addr_array)
|
|
return -EINVAL;
|
|
|
|
if (!init_data->output_sbal_addr_array)
|
|
return -EINVAL;
|
|
|
|
qdio_allocate_do_dbf(init_data);
|
|
|
|
/* create irq */
|
|
irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | 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");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
init_MUTEX(&irq_ptr->setting_up_sema);
|
|
|
|
/* QDR must be in DMA area since CCW data address is only 32 bit */
|
|
irq_ptr->qdr=kmalloc(sizeof(struct qdr), GFP_KERNEL | GFP_DMA);
|
|
if (!(irq_ptr->qdr)) {
|
|
free_page((unsigned long) irq_ptr);
|
|
QDIO_PRINT_ERR("kmalloc of irq_ptr->qdr failed!\n");
|
|
return -ENOMEM;
|
|
}
|
|
QDIO_DBF_TEXT0(0,setup,"qdr:");
|
|
QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*));
|
|
|
|
if (qdio_alloc_qs(irq_ptr,
|
|
init_data->no_input_qs,
|
|
init_data->no_output_qs)) {
|
|
qdio_release_irq_memory(irq_ptr);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
init_data->cdev->private->qdio_data = irq_ptr;
|
|
|
|
qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int qdio_fill_irq(struct qdio_initialize *init_data)
|
|
{
|
|
int i;
|
|
char dbf_text[15];
|
|
struct ciw *ciw;
|
|
int is_iqdio;
|
|
struct qdio_irq *irq_ptr;
|
|
|
|
irq_ptr = init_data->cdev->private->qdio_data;
|
|
|
|
memset(irq_ptr,0,((char*)&irq_ptr->qdr)-((char*)irq_ptr));
|
|
|
|
/* wipes qib.ac, required by ar7063 */
|
|
memset(irq_ptr->qdr,0,sizeof(struct qdr));
|
|
|
|
irq_ptr->int_parm=init_data->int_parm;
|
|
|
|
irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
|
|
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 0.%x.%x\n",
|
|
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
|
|
qdio_release_irq_memory(irq_ptr);
|
|
return -ENOBUFS;
|
|
}
|
|
}
|
|
|
|
/* defaults */
|
|
irq_ptr->equeue.cmd=DEFAULT_ESTABLISH_QS_CMD;
|
|
irq_ptr->equeue.count=DEFAULT_ESTABLISH_QS_COUNT;
|
|
irq_ptr->aqueue.cmd=DEFAULT_ACTIVATE_QS_CMD;
|
|
irq_ptr->aqueue.count=DEFAULT_ACTIVATE_QS_COUNT;
|
|
|
|
qdio_fill_qs(irq_ptr, init_data->cdev,
|
|
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);
|
|
|
|
if (!try_module_get(THIS_MODULE)) {
|
|
QDIO_PRINT_CRIT("try_module_get() failed!\n");
|
|
qdio_release_irq_memory(irq_ptr);
|
|
return -EINVAL;
|
|
}
|
|
|
|
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(struct qdesfmt0)/4; /* size in words */
|
|
irq_ptr->qdr->oqdsz=sizeof(struct qdesfmt0)/4;
|
|
|
|
irq_ptr->qdr->qiba=(unsigned long)&irq_ptr->qib;
|
|
irq_ptr->qdr->qkey=QDIO_STORAGE_KEY;
|
|
|
|
/* fill in qib */
|
|
irq_ptr->is_qebsm = is_passthrough;
|
|
if (irq_ptr->is_qebsm)
|
|
irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
|
|
|
|
irq_ptr->qib.qfmt=init_data->q_format;
|
|
if (init_data->no_input_qs)
|
|
irq_ptr->qib.isliba=(unsigned long)(irq_ptr->input_qs[0]->slib);
|
|
if (init_data->no_output_qs)
|
|
irq_ptr->qib.osliba=(unsigned long)(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 */
|
|
is_iqdio = (init_data->q_format == QDIO_IQDIO_QFMT) ? 1 : 0;
|
|
for (i=0;i<init_data->no_input_qs;i++)
|
|
qdio_allocate_fill_input_desc(irq_ptr, i, is_iqdio);
|
|
|
|
for (i=0;i<init_data->no_output_qs;i++)
|
|
qdio_allocate_fill_output_desc(irq_ptr, i,
|
|
init_data->no_input_qs,
|
|
is_iqdio);
|
|
|
|
/* qdr, qib, sls, slsbs, slibs, sbales filled. */
|
|
|
|
/* get qdio commands */
|
|
ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
|
|
if (!ciw) {
|
|
QDIO_DBF_TEXT2(1,setup,"no eq");
|
|
QDIO_PRINT_INFO("No equeue CIW found for QDIO commands. "
|
|
"Trying to use default.\n");
|
|
} else
|
|
irq_ptr->equeue = *ciw;
|
|
ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
|
|
if (!ciw) {
|
|
QDIO_DBF_TEXT2(1,setup,"no aq");
|
|
QDIO_PRINT_INFO("No aqueue CIW found for QDIO commands. "
|
|
"Trying to use default.\n");
|
|
} else
|
|
irq_ptr->aqueue = *ciw;
|
|
|
|
/* Set new interrupt handler. */
|
|
irq_ptr->original_int_handler = init_data->cdev->handler;
|
|
init_data->cdev->handler = qdio_handler;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
qdio_establish(struct qdio_initialize *init_data)
|
|
{
|
|
struct qdio_irq *irq_ptr;
|
|
unsigned long saveflags;
|
|
int result, result2;
|
|
struct ccw_device *cdev;
|
|
char dbf_text[20];
|
|
|
|
cdev=init_data->cdev;
|
|
irq_ptr = cdev->private->qdio_data;
|
|
if (!irq_ptr)
|
|
return -EINVAL;
|
|
|
|
if (cdev->private->state != DEV_STATE_ONLINE)
|
|
return -EINVAL;
|
|
|
|
down(&irq_ptr->setting_up_sema);
|
|
|
|
qdio_fill_irq(init_data);
|
|
|
|
/* the thinint CHSC stuff */
|
|
if (irq_ptr->is_thinint_irq) {
|
|
|
|
result = tiqdio_set_subchannel_ind(irq_ptr,0);
|
|
if (result) {
|
|
up(&irq_ptr->setting_up_sema);
|
|
qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
|
|
return result;
|
|
}
|
|
tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET);
|
|
}
|
|
|
|
sprintf(dbf_text,"qest%4x",cdev->private->schid.sch_no);
|
|
QDIO_DBF_TEXT0(0,setup,dbf_text);
|
|
QDIO_DBF_TEXT0(0,trace,dbf_text);
|
|
|
|
/* establish q */
|
|
irq_ptr->ccw.cmd_code=irq_ptr->equeue.cmd;
|
|
irq_ptr->ccw.flags=CCW_FLAG_SLI;
|
|
irq_ptr->ccw.count=irq_ptr->equeue.count;
|
|
irq_ptr->ccw.cda=QDIO_GET_ADDR(irq_ptr->qdr);
|
|
|
|
spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
|
|
|
|
ccw_device_set_options(cdev, 0);
|
|
result=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
|
|
QDIO_DOING_ESTABLISH,0, 0,
|
|
QDIO_ESTABLISH_TIMEOUT);
|
|
if (result) {
|
|
result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
|
|
QDIO_DOING_ESTABLISH,0,0,
|
|
QDIO_ESTABLISH_TIMEOUT);
|
|
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 0.%x.%04x: do_IO " \
|
|
"returned %i, next try returned %i\n",
|
|
irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
|
|
result, result2);
|
|
result=result2;
|
|
if (result)
|
|
ccw_device_set_timeout(cdev, 0);
|
|
}
|
|
|
|
spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
|
|
|
|
if (result) {
|
|
up(&irq_ptr->setting_up_sema);
|
|
qdio_shutdown(cdev,QDIO_FLAG_CLEANUP_USING_CLEAR);
|
|
return result;
|
|
}
|
|
|
|
/* Timeout is cared for already by using ccw_device_start_timeout(). */
|
|
wait_event_interruptible(cdev->private->wait_q,
|
|
irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
|
|
irq_ptr->state == QDIO_IRQ_STATE_ERR);
|
|
|
|
if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED)
|
|
result = 0;
|
|
else {
|
|
up(&irq_ptr->setting_up_sema);
|
|
qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
|
|
return -EIO;
|
|
}
|
|
|
|
qdio_get_ssqd_information(irq_ptr);
|
|
/* 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,"qdioac%2x",irq_ptr->qdioac);
|
|
QDIO_DBF_TEXT2(0,setup,dbf_text);
|
|
|
|
sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac);
|
|
QDIO_DBF_TEXT2(0,setup,dbf_text);
|
|
|
|
irq_ptr->hydra_gives_outbound_pcis=
|
|
irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED;
|
|
irq_ptr->sync_done_on_outb_pcis=
|
|
irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS;
|
|
|
|
qdio_initialize_set_siga_flags_input(irq_ptr);
|
|
qdio_initialize_set_siga_flags_output(irq_ptr);
|
|
|
|
up(&irq_ptr->setting_up_sema);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
int
|
|
qdio_activate(struct ccw_device *cdev, int flags)
|
|
{
|
|
struct qdio_irq *irq_ptr;
|
|
int i,result=0,result2;
|
|
unsigned long saveflags;
|
|
char dbf_text[20]; /* see qdio_initialize */
|
|
|
|
irq_ptr = cdev->private->qdio_data;
|
|
if (!irq_ptr)
|
|
return -ENODEV;
|
|
|
|
if (cdev->private->state != DEV_STATE_ONLINE)
|
|
return -EINVAL;
|
|
|
|
down(&irq_ptr->setting_up_sema);
|
|
if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
|
|
result=-EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
sprintf(dbf_text,"qact%4x", irq_ptr->schid.sch_no);
|
|
QDIO_DBF_TEXT2(0,setup,dbf_text);
|
|
QDIO_DBF_TEXT2(0,trace,dbf_text);
|
|
|
|
/* activate q */
|
|
irq_ptr->ccw.cmd_code=irq_ptr->aqueue.cmd;
|
|
irq_ptr->ccw.flags=CCW_FLAG_SLI;
|
|
irq_ptr->ccw.count=irq_ptr->aqueue.count;
|
|
irq_ptr->ccw.cda=QDIO_GET_ADDR(0);
|
|
|
|
spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
|
|
|
|
ccw_device_set_timeout(cdev, 0);
|
|
ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
|
|
result=ccw_device_start(cdev,&irq_ptr->ccw,QDIO_DOING_ACTIVATE,
|
|
0, DOIO_DENY_PREFETCH);
|
|
if (result) {
|
|
result2=ccw_device_start(cdev,&irq_ptr->ccw,
|
|
QDIO_DOING_ACTIVATE,0,0);
|
|
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 0.%x.%04x: do_IO " \
|
|
"returned %i, next try returned %i\n",
|
|
irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
|
|
result, result2);
|
|
result=result2;
|
|
}
|
|
|
|
spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
|
|
if (result)
|
|
goto out;
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
wait_event_interruptible_timeout(cdev->private->wait_q,
|
|
((irq_ptr->state ==
|
|
QDIO_IRQ_STATE_STOPPED) ||
|
|
(irq_ptr->state ==
|
|
QDIO_IRQ_STATE_ERR)),
|
|
QDIO_ACTIVATE_TIMEOUT);
|
|
|
|
switch (irq_ptr->state) {
|
|
case QDIO_IRQ_STATE_STOPPED:
|
|
case QDIO_IRQ_STATE_ERR:
|
|
up(&irq_ptr->setting_up_sema);
|
|
qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
|
|
down(&irq_ptr->setting_up_sema);
|
|
result = -EIO;
|
|
break;
|
|
default:
|
|
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
|
|
result = 0;
|
|
}
|
|
out:
|
|
up(&irq_ptr->setting_up_sema);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* buffers filled forwards again to make Rick happy */
|
|
static inline void
|
|
qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx,
|
|
unsigned int count, struct qdio_buffer *buffers)
|
|
{
|
|
struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
|
|
qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
|
|
if (irq->is_qebsm) {
|
|
while (count)
|
|
set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
|
|
return;
|
|
}
|
|
for (;;) {
|
|
set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
|
|
count--;
|
|
if (!count) break;
|
|
qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx,
|
|
unsigned int count, struct qdio_buffer *buffers)
|
|
{
|
|
struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
|
|
|
|
qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
|
|
if (irq->is_qebsm) {
|
|
while (count)
|
|
set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
|
|
return;
|
|
}
|
|
|
|
for (;;) {
|
|
set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
|
|
count--;
|
|
if (!count) break;
|
|
qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags,
|
|
unsigned int qidx, unsigned int count,
|
|
struct qdio_buffer *buffers)
|
|
{
|
|
int used_elements;
|
|
|
|
/* This is the inbound handling of queues */
|
|
used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
|
|
|
|
qdio_do_qdio_fill_input(q,qidx,count,buffers);
|
|
|
|
if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
|
|
(callflags&QDIO_FLAG_UNDER_INTERRUPT))
|
|
atomic_xchg(&q->polling,0);
|
|
|
|
if (used_elements)
|
|
return;
|
|
if (callflags&QDIO_FLAG_DONT_SIGA)
|
|
return;
|
|
if (q->siga_in) {
|
|
int result;
|
|
|
|
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);
|
|
}
|
|
|
|
static inline void
|
|
do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
|
|
unsigned int qidx, unsigned int count,
|
|
struct qdio_buffer *buffers)
|
|
{
|
|
int used_elements;
|
|
unsigned int cnt, start_buf;
|
|
unsigned char state = 0;
|
|
struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
|
|
|
|
/* This is the outbound handling of queues */
|
|
if (qdio_performance_stats)
|
|
perf_stats.start_time_outbound=NOW;
|
|
|
|
qdio_do_qdio_fill_output(q,qidx,count,buffers);
|
|
|
|
used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
|
|
|
|
if (callflags&QDIO_FLAG_DONT_SIGA) {
|
|
if (qdio_performance_stats) {
|
|
perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
|
|
perf_stats.outbound_cnt++;
|
|
}
|
|
return;
|
|
}
|
|
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 (irq->is_qebsm) {
|
|
cnt = 1;
|
|
start_buf = ((qidx+QDIO_MAX_BUFFERS_PER_Q-1) &
|
|
(QDIO_MAX_BUFFERS_PER_Q-1));
|
|
qdio_do_eqbs(q, &state, &start_buf, &cnt);
|
|
} else
|
|
state = q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
|
|
&(QDIO_MAX_BUFFERS_PER_Q-1) ];
|
|
if (state != SLSB_CU_OUTPUT_PRIMED) {
|
|
qdio_kick_outbound_q(q);
|
|
} else {
|
|
QDIO_DBF_TEXT3(0,trace, "fast-req");
|
|
if (qdio_performance_stats)
|
|
perf_stats.fast_reqs++;
|
|
}
|
|
}
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
if (qdio_performance_stats) {
|
|
perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
|
|
perf_stats.outbound_cnt++;
|
|
}
|
|
}
|
|
|
|
/* count must be 1 in iqdio */
|
|
int
|
|
do_QDIO(struct ccw_device *cdev,unsigned int callflags,
|
|
unsigned int queue_number, unsigned int qidx,
|
|
unsigned int count,struct qdio_buffer *buffers)
|
|
{
|
|
struct qdio_irq *irq_ptr;
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
char dbf_text[20];
|
|
|
|
sprintf(dbf_text,"doQD%04x",cdev->private->schid.sch_no);
|
|
QDIO_DBF_TEXT3(0,trace,dbf_text);
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
|
|
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 = cdev->private->qdio_data;
|
|
if (!irq_ptr)
|
|
return -ENODEV;
|
|
|
|
#ifdef CONFIG_QDIO_DEBUG
|
|
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);
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
|
|
if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE)
|
|
return -EBUSY;
|
|
|
|
if (callflags&QDIO_FLAG_SYNC_INPUT)
|
|
do_qdio_handle_inbound(irq_ptr->input_qs[queue_number],
|
|
callflags, qidx, count, buffers);
|
|
else if (callflags&QDIO_FLAG_SYNC_OUTPUT)
|
|
do_qdio_handle_outbound(irq_ptr->output_qs[queue_number],
|
|
callflags, qidx, count, buffers);
|
|
else {
|
|
QDIO_DBF_TEXT3(1,trace,"doQD:inv");
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
|
|
int buffer_length, int *eof, void *data)
|
|
{
|
|
int c=0;
|
|
|
|
/* 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) : %lu\n",
|
|
perf_stats.tl_runs);
|
|
_OUTP_IT("\n");
|
|
_OUTP_IT("Number of SIGA sync's issued : %lu\n",
|
|
perf_stats.siga_syncs);
|
|
_OUTP_IT("Number of SIGA in's issued : %lu\n",
|
|
perf_stats.siga_ins);
|
|
_OUTP_IT("Number of SIGA out's issued : %lu\n",
|
|
perf_stats.siga_outs);
|
|
_OUTP_IT("Number of PCIs caught : %lu\n",
|
|
perf_stats.pcis);
|
|
_OUTP_IT("Number of adapter interrupts caught : %lu\n",
|
|
perf_stats.thinints);
|
|
_OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA) : %lu\n",
|
|
perf_stats.fast_reqs);
|
|
_OUTP_IT("\n");
|
|
_OUTP_IT("Total time of all inbound actions (us) incl. UL : %lu\n",
|
|
perf_stats.inbound_time);
|
|
_OUTP_IT("Number of inbound transfers : %lu\n",
|
|
perf_stats.inbound_cnt);
|
|
_OUTP_IT("Total time of all outbound do_QDIOs (us) : %lu\n",
|
|
perf_stats.outbound_time);
|
|
_OUTP_IT("Number of do_QDIOs outbound : %lu\n",
|
|
perf_stats.outbound_cnt);
|
|
_OUTP_IT("\n");
|
|
|
|
return c;
|
|
}
|
|
|
|
static struct proc_dir_entry *qdio_perf_proc_file;
|
|
|
|
static void
|
|
qdio_add_procfs_entry(void)
|
|
{
|
|
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);
|
|
}
|
|
|
|
static void
|
|
qdio_remove_procfs_entry(void)
|
|
{
|
|
perf_stats.tl_runs=0;
|
|
|
|
if (!proc_perf_file_registration) /* means if it went ok earlier */
|
|
remove_proc_entry(QDIO_PERF,&proc_root);
|
|
}
|
|
|
|
/**
|
|
* attributes in sysfs
|
|
*****************************************************************************/
|
|
|
|
static ssize_t
|
|
qdio_performance_stats_show(struct bus_type *bus, char *buf)
|
|
{
|
|
return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
|
|
}
|
|
|
|
static ssize_t
|
|
qdio_performance_stats_store(struct bus_type *bus, const char *buf, size_t count)
|
|
{
|
|
char *tmp;
|
|
int i;
|
|
|
|
i = simple_strtoul(buf, &tmp, 16);
|
|
if ((i == 0) || (i == 1)) {
|
|
if (i == qdio_performance_stats)
|
|
return count;
|
|
qdio_performance_stats = i;
|
|
if (i==0) {
|
|
/* reset perf. stat. info */
|
|
i_p_nc = 0;
|
|
i_p_c = 0;
|
|
ii_p_nc = 0;
|
|
ii_p_c = 0;
|
|
o_p_nc = 0;
|
|
o_p_c = 0;
|
|
memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
|
|
}
|
|
} else {
|
|
QDIO_PRINT_WARN("QDIO performance_stats: write 0 or 1 to this file!\n");
|
|
return -EINVAL;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
static BUS_ATTR(qdio_performance_stats, 0644, qdio_performance_stats_show,
|
|
qdio_performance_stats_store);
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
static void
|
|
tiqdio_unregister_thinints(void)
|
|
{
|
|
if (!register_thinint_result)
|
|
s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
|
|
}
|
|
|
|
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 = kzalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
|
|
GFP_KERNEL);
|
|
if (!indicators)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
qdio_release_qdio_memory(void)
|
|
{
|
|
kfree(indicators);
|
|
}
|
|
|
|
|
|
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 CONFIG_QDIO_DEBUG
|
|
if (qdio_dbf_slsb_out)
|
|
debug_unregister(qdio_dbf_slsb_out);
|
|
if (qdio_dbf_slsb_in)
|
|
debug_unregister(qdio_dbf_slsb_in);
|
|
#endif /* CONFIG_QDIO_DEBUG */
|
|
}
|
|
|
|
static int
|
|
qdio_register_dbf_views(void)
|
|
{
|
|
qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
|
|
QDIO_DBF_SETUP_PAGES,
|
|
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_PAGES,
|
|
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_PAGES,
|
|
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_PAGES,
|
|
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 CONFIG_QDIO_DEBUG
|
|
qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
|
|
QDIO_DBF_SLSB_OUT_PAGES,
|
|
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_PAGES,
|
|
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 /* CONFIG_QDIO_DEBUG */
|
|
return 0;
|
|
oom:
|
|
QDIO_PRINT_ERR("not enough memory for dbf.\n");
|
|
qdio_unregister_dbf_views();
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static void *qdio_mempool_alloc(gfp_t gfp_mask, void *size)
|
|
{
|
|
return (void *) get_zeroed_page(gfp_mask|GFP_DMA);
|
|
}
|
|
|
|
static void qdio_mempool_free(void *element, void *size)
|
|
{
|
|
free_page((unsigned long) element);
|
|
}
|
|
|
|
static int __init
|
|
init_QDIO(void)
|
|
{
|
|
int res;
|
|
void *ptr;
|
|
|
|
printk("qdio: loading %s\n",version);
|
|
|
|
res=qdio_get_qdio_memory();
|
|
if (res)
|
|
return res;
|
|
|
|
res = qdio_register_dbf_views();
|
|
if (res)
|
|
return res;
|
|
|
|
QDIO_DBF_TEXT0(0,setup,"initQDIO");
|
|
res = bus_create_file(&ccw_bus_type, &bus_attr_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*));
|
|
|
|
qdio_add_procfs_entry();
|
|
|
|
qdio_mempool_scssc = mempool_create(QDIO_MEMPOOL_SCSSC_ELEMENTS,
|
|
qdio_mempool_alloc,
|
|
qdio_mempool_free, NULL);
|
|
|
|
if (tiqdio_check_chsc_availability())
|
|
QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");
|
|
|
|
tiqdio_register_thinints();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit
|
|
cleanup_QDIO(void)
|
|
{
|
|
tiqdio_unregister_thinints();
|
|
qdio_remove_procfs_entry();
|
|
qdio_release_qdio_memory();
|
|
qdio_unregister_dbf_views();
|
|
mempool_destroy(qdio_mempool_scssc);
|
|
bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
|
|
printk("qdio: %s: module removed\n",version);
|
|
}
|
|
|
|
module_init(init_QDIO);
|
|
module_exit(cleanup_QDIO);
|
|
|
|
EXPORT_SYMBOL(qdio_allocate);
|
|
EXPORT_SYMBOL(qdio_establish);
|
|
EXPORT_SYMBOL(qdio_initialize);
|
|
EXPORT_SYMBOL(qdio_activate);
|
|
EXPORT_SYMBOL(do_QDIO);
|
|
EXPORT_SYMBOL(qdio_shutdown);
|
|
EXPORT_SYMBOL(qdio_free);
|
|
EXPORT_SYMBOL(qdio_cleanup);
|
|
EXPORT_SYMBOL(qdio_synchronize);
|