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path: root/drivers/s390/cio/qdio_main.c
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Diffstat (limited to 'drivers/s390/cio/qdio_main.c')
-rw-r--r--drivers/s390/cio/qdio_main.c1731
1 files changed, 928 insertions, 803 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index d10c73cc168..848e3b64ea6 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -1,9 +1,7 @@
/*
- * linux/drivers/s390/cio/qdio_main.c
- *
* Linux for s390 qdio support, buffer handling, qdio API and module support.
*
- * Copyright 2000,2008 IBM Corp.
+ * Copyright IBM Corp. 2000, 2008
* Author(s): Utz Bacher <utz.bacher@de.ibm.com>
* Jan Glauber <jang@linux.vnet.ibm.com>
* 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com>
@@ -13,27 +11,30 @@
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/delay.h>
-#include <asm/atomic.h>
+#include <linux/gfp.h>
+#include <linux/io.h>
+#include <linux/atomic.h>
#include <asm/debug.h>
#include <asm/qdio.h>
+#include <asm/ipl.h>
#include "cio.h"
#include "css.h"
#include "device.h"
#include "qdio.h"
#include "qdio_debug.h"
-#include "qdio_perf.h"
MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>,"\
"Jan Glauber <jang@linux.vnet.ibm.com>");
MODULE_DESCRIPTION("QDIO base support");
MODULE_LICENSE("GPL");
-static inline int do_siga_sync(struct subchannel_id schid,
- unsigned int out_mask, unsigned int in_mask)
+static inline int do_siga_sync(unsigned long schid,
+ unsigned int out_mask, unsigned int in_mask,
+ unsigned int fc)
{
- register unsigned long __fc asm ("0") = 2;
- register struct subchannel_id __schid asm ("1") = schid;
+ register unsigned long __fc asm ("0") = fc;
+ register unsigned long __schid asm ("1") = schid;
register unsigned long out asm ("2") = out_mask;
register unsigned long in asm ("3") = in_mask;
int cc;
@@ -47,10 +48,11 @@ static inline int do_siga_sync(struct subchannel_id schid,
return cc;
}
-static inline int do_siga_input(struct subchannel_id schid, unsigned int mask)
+static inline int do_siga_input(unsigned long schid, unsigned int mask,
+ unsigned int fc)
{
- register unsigned long __fc asm ("0") = 1;
- register struct subchannel_id __schid asm ("1") = schid;
+ register unsigned long __fc asm ("0") = fc;
+ register unsigned long __schid asm ("1") = schid;
register unsigned long __mask asm ("2") = mask;
int cc;
@@ -59,7 +61,7 @@ static inline int do_siga_input(struct subchannel_id schid, unsigned int mask)
" ipm %0\n"
" srl %0,28\n"
: "=d" (cc)
- : "d" (__fc), "d" (__schid), "d" (__mask) : "cc", "memory");
+ : "d" (__fc), "d" (__schid), "d" (__mask) : "cc");
return cc;
}
@@ -70,42 +72,43 @@ static inline int do_siga_input(struct subchannel_id schid, unsigned int mask)
* @bb: busy bit indicator, set only if SIGA-w/wt could not access a buffer
* @fc: function code to perform
*
- * Returns cc or QDIO_ERROR_SIGA_ACCESS_EXCEPTION.
+ * Returns condition code.
* Note: For IQDC unicast queues only the highest priority queue is processed.
*/
static inline int do_siga_output(unsigned long schid, unsigned long mask,
- u32 *bb, unsigned int fc)
+ unsigned int *bb, unsigned int fc,
+ unsigned long aob)
{
register unsigned long __fc asm("0") = fc;
register unsigned long __schid asm("1") = schid;
register unsigned long __mask asm("2") = mask;
- int cc = QDIO_ERROR_SIGA_ACCESS_EXCEPTION;
+ register unsigned long __aob asm("3") = aob;
+ int cc;
asm volatile(
" siga 0\n"
- "0: ipm %0\n"
+ " ipm %0\n"
" srl %0,28\n"
- "1:\n"
- EX_TABLE(0b, 1b)
- : "+d" (cc), "+d" (__fc), "+d" (__schid), "+d" (__mask)
- : : "cc", "memory");
- *bb = ((unsigned int) __fc) >> 31;
+ : "=d" (cc), "+d" (__fc), "+d" (__aob)
+ : "d" (__schid), "d" (__mask)
+ : "cc");
+ *bb = __fc >> 31;
return cc;
}
static inline int qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
{
- char dbf_text[15];
-
/* all done or next buffer state different */
if (ccq == 0 || ccq == 32)
return 0;
- /* not all buffers processed */
- if (ccq == 96 || ccq == 97)
+ /* no buffer processed */
+ if (ccq == 97)
return 1;
+ /* not all buffers processed */
+ if (ccq == 96)
+ return 2;
/* notify devices immediately */
- sprintf(dbf_text, "%d", ccq);
- QDIO_DBF_TEXT2(1, trace, dbf_text);
+ DBF_ERROR("%4x ccq:%3d", SCH_NO(q), ccq);
return -EIO;
}
@@ -115,47 +118,52 @@ static inline int qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
* @state: state of the extracted buffers
* @start: buffer number to start at
* @count: count of buffers to examine
+ * @auto_ack: automatically acknowledge buffers
*
- * Returns the number of successfull extracted equal buffer states.
+ * Returns the number of successfully extracted equal buffer states.
* Stops processing if a state is different from the last buffers state.
*/
static int qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
- int start, int count)
+ int start, int count, int auto_ack)
{
+ int rc, tmp_count = count, tmp_start = start, nr = q->nr, retried = 0;
unsigned int ccq = 0;
- int tmp_count = count, tmp_start = start;
- int nr = q->nr;
- int rc;
- char dbf_text[15];
- BUG_ON(!q->irq_ptr->sch_token);
+ qperf_inc(q, eqbs);
if (!q->is_input_q)
nr += q->irq_ptr->nr_input_qs;
again:
- ccq = do_eqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count);
+ ccq = do_eqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count,
+ auto_ack);
rc = qdio_check_ccq(q, ccq);
+ if (!rc)
+ return count - tmp_count;
- /* At least one buffer was processed, return and extract the remaining
- * buffers later.
- */
- if ((ccq == 96) && (count != tmp_count))
- return (count - tmp_count);
if (rc == 1) {
- QDIO_DBF_TEXT5(1, trace, "eqAGAIN");
+ DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "EQBS again:%2d", ccq);
goto again;
}
- if (rc < 0) {
- QDIO_DBF_TEXT2(1, trace, "eqberr");
- sprintf(dbf_text, "%2x,%2x,%d,%d", count, tmp_count, ccq, nr);
- QDIO_DBF_TEXT2(1, trace, dbf_text);
- q->handler(q->irq_ptr->cdev,
- QDIO_ERROR_ACTIVATE_CHECK_CONDITION,
- 0, -1, -1, q->irq_ptr->int_parm);
- return 0;
+ if (rc == 2) {
+ qperf_inc(q, eqbs_partial);
+ DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "EQBS part:%02x",
+ tmp_count);
+ /*
+ * Retry once, if that fails bail out and process the
+ * extracted buffers before trying again.
+ */
+ if (!retried++)
+ goto again;
+ else
+ return count - tmp_count;
}
- return count - tmp_count;
+
+ DBF_ERROR("%4x EQBS ERROR", SCH_NO(q));
+ DBF_ERROR("%3d%3d%2d", count, tmp_count, nr);
+ q->handler(q->irq_ptr->cdev, QDIO_ERROR_GET_BUF_STATE,
+ q->nr, q->first_to_kick, count, q->irq_ptr->int_parm);
+ return 0;
}
/**
@@ -176,52 +184,54 @@ static int qdio_do_sqbs(struct qdio_q *q, unsigned char state, int start,
int tmp_count = count, tmp_start = start;
int nr = q->nr;
int rc;
- char dbf_text[15];
- BUG_ON(!q->irq_ptr->sch_token);
+ if (!count)
+ return 0;
+ qperf_inc(q, sqbs);
if (!q->is_input_q)
nr += q->irq_ptr->nr_input_qs;
again:
ccq = do_sqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count);
rc = qdio_check_ccq(q, ccq);
- if (rc == 1) {
- QDIO_DBF_TEXT5(1, trace, "sqAGAIN");
- goto again;
+ if (!rc) {
+ WARN_ON_ONCE(tmp_count);
+ return count - tmp_count;
}
- if (rc < 0) {
- QDIO_DBF_TEXT3(1, trace, "sqberr");
- sprintf(dbf_text, "%2x,%2x", count, tmp_count);
- QDIO_DBF_TEXT3(1, trace, dbf_text);
- sprintf(dbf_text, "%d,%d", ccq, nr);
- QDIO_DBF_TEXT3(1, trace, dbf_text);
-
- q->handler(q->irq_ptr->cdev,
- QDIO_ERROR_ACTIVATE_CHECK_CONDITION,
- 0, -1, -1, q->irq_ptr->int_parm);
- return 0;
+
+ if (rc == 1 || rc == 2) {
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "SQBS again:%2d", ccq);
+ qperf_inc(q, sqbs_partial);
+ goto again;
}
- WARN_ON(tmp_count);
- return count - tmp_count;
+
+ DBF_ERROR("%4x SQBS ERROR", SCH_NO(q));
+ DBF_ERROR("%3d%3d%2d", count, tmp_count, nr);
+ q->handler(q->irq_ptr->cdev, QDIO_ERROR_SET_BUF_STATE,
+ q->nr, q->first_to_kick, count, q->irq_ptr->int_parm);
+ return 0;
}
/* returns number of examined buffers and their common state in *state */
static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr,
- unsigned char *state, unsigned int count)
+ unsigned char *state, unsigned int count,
+ int auto_ack, int merge_pending)
{
unsigned char __state = 0;
int i;
- BUG_ON(bufnr > QDIO_MAX_BUFFERS_MASK);
- BUG_ON(count > QDIO_MAX_BUFFERS_PER_Q);
-
if (is_qebsm(q))
- return qdio_do_eqbs(q, state, bufnr, count);
+ return qdio_do_eqbs(q, state, bufnr, count, auto_ack);
for (i = 0; i < count; i++) {
- if (!__state)
+ if (!__state) {
__state = q->slsb.val[bufnr];
- else if (q->slsb.val[bufnr] != __state)
+ if (merge_pending && __state == SLSB_P_OUTPUT_PENDING)
+ __state = SLSB_P_OUTPUT_EMPTY;
+ } else if (merge_pending) {
+ if ((q->slsb.val[bufnr] & __state) != __state)
+ break;
+ } else if (q->slsb.val[bufnr] != __state)
break;
bufnr = next_buf(bufnr);
}
@@ -229,10 +239,10 @@ static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr,
return i;
}
-inline int get_buf_state(struct qdio_q *q, unsigned int bufnr,
- unsigned char *state)
+static inline int get_buf_state(struct qdio_q *q, unsigned int bufnr,
+ unsigned char *state, int auto_ack)
{
- return get_buf_states(q, bufnr, state, 1);
+ return get_buf_states(q, bufnr, state, 1, auto_ack, 0);
}
/* wrap-around safe setting of slsb states, returns number of changed buffers */
@@ -241,9 +251,6 @@ static inline int set_buf_states(struct qdio_q *q, int bufnr,
{
int i;
- BUG_ON(bufnr > QDIO_MAX_BUFFERS_MASK);
- BUG_ON(count > QDIO_MAX_BUFFERS_PER_Q);
-
if (is_qebsm(q))
return qdio_do_sqbs(q, state, bufnr, count);
@@ -261,7 +268,7 @@ static inline int set_buf_state(struct qdio_q *q, int bufnr,
}
/* set slsb states to initial state */
-void qdio_init_buf_states(struct qdio_irq *irq_ptr)
+static void qdio_init_buf_states(struct qdio_irq *irq_ptr)
{
struct qdio_q *q;
int i;
@@ -274,26 +281,28 @@ void qdio_init_buf_states(struct qdio_irq *irq_ptr)
QDIO_MAX_BUFFERS_PER_Q);
}
-static int qdio_siga_sync(struct qdio_q *q, unsigned int output,
+static inline int qdio_siga_sync(struct qdio_q *q, unsigned int output,
unsigned int input)
{
+ unsigned long schid = *((u32 *) &q->irq_ptr->schid);
+ unsigned int fc = QDIO_SIGA_SYNC;
int cc;
- if (!need_siga_sync(q))
- return 0;
-
- qdio_perf_stat_inc(&perf_stats.siga_sync);
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-s:%1d", q->nr);
+ qperf_inc(q, siga_sync);
- cc = do_siga_sync(q->irq_ptr->schid, output, input);
- if (cc) {
- QDIO_DBF_TEXT4(0, trace, "sigasync");
- QDIO_DBF_HEX4(0, trace, &q, sizeof(void *));
- QDIO_DBF_HEX3(0, trace, &cc, sizeof(int *));
+ if (is_qebsm(q)) {
+ schid = q->irq_ptr->sch_token;
+ fc |= QDIO_SIGA_QEBSM_FLAG;
}
- return cc;
+
+ cc = do_siga_sync(schid, output, input, fc);
+ if (unlikely(cc))
+ DBF_ERROR("%4x SIGA-S:%2d", SCH_NO(q), cc);
+ return (cc) ? -EIO : 0;
}
-inline int qdio_siga_sync_q(struct qdio_q *q)
+static inline int qdio_siga_sync_q(struct qdio_q *q)
{
if (q->is_input_q)
return qdio_siga_sync(q, 0, q->mask);
@@ -301,127 +310,200 @@ inline int qdio_siga_sync_q(struct qdio_q *q)
return qdio_siga_sync(q, q->mask, 0);
}
-static inline int qdio_siga_sync_out(struct qdio_q *q)
-{
- return qdio_siga_sync(q, ~0U, 0);
-}
-
-static inline int qdio_siga_sync_all(struct qdio_q *q)
+static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit,
+ unsigned long aob)
{
- return qdio_siga_sync(q, ~0U, ~0U);
-}
+ unsigned long schid = *((u32 *) &q->irq_ptr->schid);
+ unsigned int fc = QDIO_SIGA_WRITE;
+ u64 start_time = 0;
+ int retries = 0, cc;
+ unsigned long laob = 0;
-static inline int qdio_do_siga_output(struct qdio_q *q, unsigned int *busy_bit)
-{
- unsigned int fc = 0;
- unsigned long schid;
+ if (q->u.out.use_cq && aob != 0) {
+ fc = QDIO_SIGA_WRITEQ;
+ laob = aob;
+ }
- if (!is_qebsm(q))
- schid = *((u32 *)&q->irq_ptr->schid);
- else {
+ if (is_qebsm(q)) {
schid = q->irq_ptr->sch_token;
- fc |= 0x80;
+ fc |= QDIO_SIGA_QEBSM_FLAG;
}
- return do_siga_output(schid, q->mask, busy_bit, fc);
-}
-
-static int qdio_siga_output(struct qdio_q *q)
-{
- int cc;
- u32 busy_bit;
- u64 start_time = 0;
+again:
+ WARN_ON_ONCE((aob && queue_type(q) != QDIO_IQDIO_QFMT) ||
+ (aob && fc != QDIO_SIGA_WRITEQ));
+ cc = do_siga_output(schid, q->mask, busy_bit, fc, laob);
- QDIO_DBF_TEXT5(0, trace, "sigaout");
- QDIO_DBF_HEX5(0, trace, &q, sizeof(void *));
+ /* hipersocket busy condition */
+ if (unlikely(*busy_bit)) {
+ retries++;
- qdio_perf_stat_inc(&perf_stats.siga_out);
-again:
- cc = qdio_do_siga_output(q, &busy_bit);
- if (queue_type(q) == QDIO_IQDIO_QFMT && cc == 2 && busy_bit) {
- if (!start_time)
- start_time = get_usecs();
- else if ((get_usecs() - start_time) < QDIO_BUSY_BIT_PATIENCE)
+ if (!start_time) {
+ start_time = get_tod_clock_fast();
+ goto again;
+ }
+ if (get_tod_clock_fast() - start_time < QDIO_BUSY_BIT_PATIENCE)
goto again;
}
-
- if (cc == 2 && busy_bit)
- cc |= QDIO_ERROR_SIGA_BUSY;
- if (cc)
- QDIO_DBF_HEX3(0, trace, &cc, sizeof(int *));
+ if (retries) {
+ DBF_DEV_EVENT(DBF_WARN, q->irq_ptr,
+ "%4x cc2 BB1:%1d", SCH_NO(q), q->nr);
+ DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "count:%u", retries);
+ }
return cc;
}
static inline int qdio_siga_input(struct qdio_q *q)
{
+ unsigned long schid = *((u32 *) &q->irq_ptr->schid);
+ unsigned int fc = QDIO_SIGA_READ;
int cc;
- QDIO_DBF_TEXT4(0, trace, "sigain");
- QDIO_DBF_HEX4(0, trace, &q, sizeof(void *));
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-r:%1d", q->nr);
+ qperf_inc(q, siga_read);
- qdio_perf_stat_inc(&perf_stats.siga_in);
+ if (is_qebsm(q)) {
+ schid = q->irq_ptr->sch_token;
+ fc |= QDIO_SIGA_QEBSM_FLAG;
+ }
- cc = do_siga_input(q->irq_ptr->schid, q->mask);
- if (cc)
- QDIO_DBF_HEX3(0, trace, &cc, sizeof(int *));
- return cc;
+ cc = do_siga_input(schid, q->mask, fc);
+ if (unlikely(cc))
+ DBF_ERROR("%4x SIGA-R:%2d", SCH_NO(q), cc);
+ return (cc) ? -EIO : 0;
}
-/* called from thinint inbound handler */
-void qdio_sync_after_thinint(struct qdio_q *q)
+#define qdio_siga_sync_out(q) qdio_siga_sync(q, ~0U, 0)
+#define qdio_siga_sync_all(q) qdio_siga_sync(q, ~0U, ~0U)
+
+static inline void qdio_sync_queues(struct qdio_q *q)
{
- if (pci_out_supported(q)) {
- if (need_siga_sync_thinint(q))
- qdio_siga_sync_all(q);
- else if (need_siga_sync_out_thinint(q))
- qdio_siga_sync_out(q);
- } else
+ /* PCI capable outbound queues will also be scanned so sync them too */
+ if (pci_out_supported(q))
+ qdio_siga_sync_all(q);
+ else
qdio_siga_sync_q(q);
}
-inline void qdio_stop_polling(struct qdio_q *q)
+int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
+ unsigned char *state)
{
- spin_lock_bh(&q->u.in.lock);
- if (!q->u.in.polling) {
- spin_unlock_bh(&q->u.in.lock);
+ if (need_siga_sync(q))
+ qdio_siga_sync_q(q);
+ return get_buf_states(q, bufnr, state, 1, 0, 0);
+}
+
+static inline void qdio_stop_polling(struct qdio_q *q)
+{
+ if (!q->u.in.polling)
return;
- }
+
q->u.in.polling = 0;
- qdio_perf_stat_inc(&perf_stats.debug_stop_polling);
+ qperf_inc(q, stop_polling);
/* show the card that we are not polling anymore */
- set_buf_state(q, q->last_move_ftc, SLSB_P_INPUT_NOT_INIT);
- spin_unlock_bh(&q->u.in.lock);
+ if (is_qebsm(q)) {
+ set_buf_states(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT,
+ q->u.in.ack_count);
+ q->u.in.ack_count = 0;
+ } else
+ set_buf_state(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT);
}
-static void announce_buffer_error(struct qdio_q *q)
+static inline void account_sbals(struct qdio_q *q, unsigned int count)
{
- char dbf_text[15];
+ int pos;
- if (q->is_input_q)
- QDIO_DBF_TEXT3(1, trace, "inperr");
- else
- QDIO_DBF_TEXT3(0, trace, "outperr");
+ q->q_stats.nr_sbal_total += count;
+ if (count == QDIO_MAX_BUFFERS_MASK) {
+ q->q_stats.nr_sbals[7]++;
+ return;
+ }
+ pos = ilog2(count);
+ q->q_stats.nr_sbals[pos]++;
+}
- sprintf(dbf_text, "%x-%x-%x", q->first_to_check,
- q->sbal[q->first_to_check]->element[14].flags,
- q->sbal[q->first_to_check]->element[15].flags);
- QDIO_DBF_TEXT3(1, trace, dbf_text);
- QDIO_DBF_HEX2(1, trace, q->sbal[q->first_to_check], 256);
+static void process_buffer_error(struct qdio_q *q, int count)
+{
+ unsigned char state = (q->is_input_q) ? SLSB_P_INPUT_NOT_INIT :
+ SLSB_P_OUTPUT_NOT_INIT;
q->qdio_error = QDIO_ERROR_SLSB_STATE;
+
+ /* special handling for no target buffer empty */
+ if ((!q->is_input_q &&
+ (q->sbal[q->first_to_check]->element[15].sflags) == 0x10)) {
+ qperf_inc(q, target_full);
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "OUTFULL FTC:%02x",
+ q->first_to_check);
+ goto set;
+ }
+
+ DBF_ERROR("%4x BUF ERROR", SCH_NO(q));
+ DBF_ERROR((q->is_input_q) ? "IN:%2d" : "OUT:%2d", q->nr);
+ DBF_ERROR("FTC:%3d C:%3d", q->first_to_check, count);
+ DBF_ERROR("F14:%2x F15:%2x",
+ q->sbal[q->first_to_check]->element[14].sflags,
+ q->sbal[q->first_to_check]->element[15].sflags);
+
+set:
+ /*
+ * Interrupts may be avoided as long as the error is present
+ * so change the buffer state immediately to avoid starvation.
+ */
+ set_buf_states(q, q->first_to_check, state, count);
}
-static int get_inbound_buffer_frontier(struct qdio_q *q)
+static inline void inbound_primed(struct qdio_q *q, int count)
{
- int count, stop;
- unsigned char state;
+ int new;
+
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in prim: %02x", count);
+
+ /* for QEBSM the ACK was already set by EQBS */
+ if (is_qebsm(q)) {
+ if (!q->u.in.polling) {
+ q->u.in.polling = 1;
+ q->u.in.ack_count = count;
+ q->u.in.ack_start = q->first_to_check;
+ return;
+ }
+
+ /* delete the previous ACK's */
+ set_buf_states(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT,
+ q->u.in.ack_count);
+ q->u.in.ack_count = count;
+ q->u.in.ack_start = q->first_to_check;
+ return;
+ }
/*
- * If we still poll don't update last_move_ftc, keep the
- * previously ACK buffer there.
+ * ACK the newest buffer. The ACK will be removed in qdio_stop_polling
+ * or by the next inbound run.
*/
- if (!q->u.in.polling)
- q->last_move_ftc = q->first_to_check;
+ new = add_buf(q->first_to_check, count - 1);
+ if (q->u.in.polling) {
+ /* reset the previous ACK but first set the new one */
+ set_buf_state(q, new, SLSB_P_INPUT_ACK);
+ set_buf_state(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT);
+ } else {
+ q->u.in.polling = 1;
+ set_buf_state(q, new, SLSB_P_INPUT_ACK);
+ }
+
+ q->u.in.ack_start = new;
+ count--;
+ if (!count)
+ return;
+ /* need to change ALL buffers to get more interrupts */
+ set_buf_states(q, q->first_to_check, SLSB_P_INPUT_NOT_INIT, count);
+}
+
+static int get_inbound_buffer_frontier(struct qdio_q *q)
+{
+ int count, stop;
+ unsigned char state = 0;
+
+ q->timestamp = get_tod_clock_fast();
/*
* Don't check 128 buffers, as otherwise qdio_inbound_q_moved
@@ -430,194 +512,210 @@ static int get_inbound_buffer_frontier(struct qdio_q *q)
count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK);
stop = add_buf(q->first_to_check, count);
- /*
- * No siga sync here, as a PCI or we after a thin interrupt
- * will sync the queues.
- */
-
- /* need to set count to 1 for non-qebsm */
- if (!is_qebsm(q))
- count = 1;
-
-check_next:
if (q->first_to_check == stop)
goto out;
- count = get_buf_states(q, q->first_to_check, &state, count);
+ /*
+ * No siga sync here, as a PCI or we after a thin interrupt
+ * already sync'ed the queues.
+ */
+ count = get_buf_states(q, q->first_to_check, &state, count, 1, 0);
if (!count)
goto out;
switch (state) {
case SLSB_P_INPUT_PRIMED:
- QDIO_DBF_TEXT5(0, trace, "inptprim");
-
- /*
- * Only ACK the first buffer. The ACK will be removed in
- * qdio_stop_polling.
- */
- if (q->u.in.polling)
- state = SLSB_P_INPUT_NOT_INIT;
- else {
- q->u.in.polling = 1;
- state = SLSB_P_INPUT_ACK;
- }
- set_buf_state(q, q->first_to_check, state);
-
- /*
- * Need to change all PRIMED buffers to NOT_INIT, otherwise
- * we're loosing initiative in the thinint code.
- */
- if (count > 1)
- set_buf_states(q, next_buf(q->first_to_check),
- SLSB_P_INPUT_NOT_INIT, count - 1);
-
- /*
- * No siga-sync needed for non-qebsm here, as the inbound queue
- * will be synced on the next siga-r, resp.
- * tiqdio_is_inbound_q_done will do the siga-sync.
- */
+ inbound_primed(q, count);
q->first_to_check = add_buf(q->first_to_check, count);
- atomic_sub(count, &q->nr_buf_used);
- goto check_next;
+ if (atomic_sub_return(count, &q->nr_buf_used) == 0)
+ qperf_inc(q, inbound_queue_full);
+ if (q->irq_ptr->perf_stat_enabled)
+ account_sbals(q, count);
+ break;
case SLSB_P_INPUT_ERROR:
- announce_buffer_error(q);
- /* process the buffer, the upper layer will take care of it */
+ process_buffer_error(q, count);
q->first_to_check = add_buf(q->first_to_check, count);
atomic_sub(count, &q->nr_buf_used);
+ if (q->irq_ptr->perf_stat_enabled)
+ account_sbals_error(q, count);
break;
case SLSB_CU_INPUT_EMPTY:
case SLSB_P_INPUT_NOT_INIT:
case SLSB_P_INPUT_ACK:
- QDIO_DBF_TEXT5(0, trace, "inpnipro");
+ if (q->irq_ptr->perf_stat_enabled)
+ q->q_stats.nr_sbal_nop++;
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in nop");
break;
default:
- BUG();
+ WARN_ON_ONCE(1);
}
out:
- QDIO_DBF_HEX4(0, trace, &q->first_to_check, sizeof(int));
return q->first_to_check;
}
-int qdio_inbound_q_moved(struct qdio_q *q)
+static int qdio_inbound_q_moved(struct qdio_q *q)
{
int bufnr;
bufnr = get_inbound_buffer_frontier(q);
- if ((bufnr != q->last_move_ftc) || q->qdio_error) {
- if (!need_siga_sync(q) && !pci_out_supported(q))
- q->u.in.timestamp = get_usecs();
-
- QDIO_DBF_TEXT4(0, trace, "inhasmvd");
- QDIO_DBF_HEX4(0, trace, &q, sizeof(void *));
+ if (bufnr != q->last_move) {
+ q->last_move = bufnr;
+ if (!is_thinint_irq(q->irq_ptr) && MACHINE_IS_LPAR)
+ q->u.in.timestamp = get_tod_clock();
return 1;
} else
return 0;
}
-static int qdio_inbound_q_done(struct qdio_q *q)
+static inline int qdio_inbound_q_done(struct qdio_q *q)
{
- unsigned char state;
-#ifdef CONFIG_QDIO_DEBUG
- char dbf_text[15];
-#endif
+ unsigned char state = 0;
if (!atomic_read(&q->nr_buf_used))
return 1;
- /*
- * We need that one for synchronization with the adapter, as it
- * does a kind of PCI avoidance.
- */
- qdio_siga_sync_q(q);
+ if (need_siga_sync(q))
+ qdio_siga_sync_q(q);
+ get_buf_state(q, q->first_to_check, &state, 0);
- get_buf_state(q, q->first_to_check, &state);
- if (state == SLSB_P_INPUT_PRIMED)
- /* we got something to do */
+ if (state == SLSB_P_INPUT_PRIMED || state == SLSB_P_INPUT_ERROR)
+ /* more work coming */
return 0;
- /* on VM, we don't poll, so the q is always done here */
- if (need_siga_sync(q) || pci_out_supported(q))
+ if (is_thinint_irq(q->irq_ptr))
+ return 1;
+
+ /* don't poll under z/VM */
+ if (MACHINE_IS_VM)
return 1;
/*
* At this point we know, that inbound first_to_check
* has (probably) not moved (see qdio_inbound_processing).
*/
- if (get_usecs() > q->u.in.timestamp + QDIO_INPUT_THRESHOLD) {
-#ifdef CONFIG_QDIO_DEBUG
- QDIO_DBF_TEXT4(0, trace, "inqisdon");
- QDIO_DBF_HEX4(0, trace, &q, sizeof(void *));
- sprintf(dbf_text, "pf%02x", q->first_to_check);
- QDIO_DBF_TEXT4(0, trace, dbf_text);
-#endif /* CONFIG_QDIO_DEBUG */
+ if (get_tod_clock_fast() > q->u.in.timestamp + QDIO_INPUT_THRESHOLD) {
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in done:%02x",
+ q->first_to_check);
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%02x", q->first_to_check);
- QDIO_DBF_TEXT4(0, trace, dbf_text);
-#endif /* CONFIG_QDIO_DEBUG */
+ } else
return 0;
+}
+
+static inline int contains_aobs(struct qdio_q *q)
+{
+ return !q->is_input_q && q->u.out.use_cq;
+}
+
+static inline void qdio_handle_aobs(struct qdio_q *q, int start, int count)
+{
+ unsigned char state = 0;
+ int j, b = start;
+
+ if (!contains_aobs(q))
+ return;
+
+ for (j = 0; j < count; ++j) {
+ get_buf_state(q, b, &state, 0);
+ if (state == SLSB_P_OUTPUT_PENDING) {
+ struct qaob *aob = q->u.out.aobs[b];
+ if (aob == NULL)
+ continue;
+
+ q->u.out.sbal_state[b].flags |=
+ QDIO_OUTBUF_STATE_FLAG_PENDING;
+ q->u.out.aobs[b] = NULL;
+ } else if (state == SLSB_P_OUTPUT_EMPTY) {
+ q->u.out.sbal_state[b].aob = NULL;
+ }
+ b = next_buf(b);
}
}
-void qdio_kick_inbound_handler(struct qdio_q *q)
+static inline unsigned long qdio_aob_for_buffer(struct qdio_output_q *q,
+ int bufnr)
{
- int count, start, end;
-#ifdef CONFIG_QDIO_DEBUG
- char dbf_text[15];
-#endif
+ unsigned long phys_aob = 0;
- qdio_perf_stat_inc(&perf_stats.inbound_handler);
+ if (!q->use_cq)
+ goto out;
- start = q->first_to_kick;
- end = q->first_to_check;
- if (end >= start)
- count = end - start;
- else
- count = end + QDIO_MAX_BUFFERS_PER_Q - start;
+ if (!q->aobs[bufnr]) {
+ struct qaob *aob = qdio_allocate_aob();
+ q->aobs[bufnr] = aob;
+ }
+ if (q->aobs[bufnr]) {
+ q->sbal_state[bufnr].flags = QDIO_OUTBUF_STATE_FLAG_NONE;
+ q->sbal_state[bufnr].aob = q->aobs[bufnr];
+ q->aobs[bufnr]->user1 = (u64) q->sbal_state[bufnr].user;
+ phys_aob = virt_to_phys(q->aobs[bufnr]);
+ WARN_ON_ONCE(phys_aob & 0xFF);
+ }
-#ifdef CONFIG_QDIO_DEBUG
- sprintf(dbf_text, "s=%2xc=%2x", start, count);
- QDIO_DBF_TEXT4(0, trace, dbf_text);
-#endif /* CONFIG_QDIO_DEBUG */
+out:
+ return phys_aob;
+}
+
+static void qdio_kick_handler(struct qdio_q *q)
+{
+ int start = q->first_to_kick;
+ int end = q->first_to_check;
+ int count;
if (unlikely(q->irq_ptr->state != QDIO_IRQ_STATE_ACTIVE))
return;
- q->handler(q->irq_ptr->cdev, q->qdio_error, q->nr,
- start, count, q->irq_ptr->int_parm);
+ count = sub_buf(end, start);
+
+ if (q->is_input_q) {
+ qperf_inc(q, inbound_handler);
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "kih s:%02x c:%02x", start, count);
+ } else {
+ qperf_inc(q, outbound_handler);
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "koh: s:%02x c:%02x",
+ start, count);
+ }
+
+ qdio_handle_aobs(q, start, count);
+
+ q->handler(q->irq_ptr->cdev, q->qdio_error, q->nr, start, count,
+ q->irq_ptr->int_parm);
/* for the next time */
- q->first_to_kick = q->first_to_check;
+ q->first_to_kick = end;
q->qdio_error = 0;
}
static void __qdio_inbound_processing(struct qdio_q *q)
{
- qdio_perf_stat_inc(&perf_stats.tasklet_inbound);
-again:
+ qperf_inc(q, tasklet_inbound);
+
if (!qdio_inbound_q_moved(q))
return;
- qdio_kick_inbound_handler(q);
+ qdio_kick_handler(q);
- if (!qdio_inbound_q_done(q))
+ if (!qdio_inbound_q_done(q)) {
/* means poll time is not yet over */
- goto again;
+ qperf_inc(q, tasklet_inbound_resched);
+ if (likely(q->irq_ptr->state != QDIO_IRQ_STATE_STOPPED)) {
+ tasklet_schedule(&q->tasklet);
+ return;
+ }
+ }
qdio_stop_polling(q);
/*
* We need to check again to not lose initiative after
* resetting the ACK state.
*/
- if (!qdio_inbound_q_done(q))
- goto again;
+ if (!qdio_inbound_q_done(q)) {
+ qperf_inc(q, tasklet_inbound_resched2);
+ if (likely(q->irq_ptr->state != QDIO_IRQ_STATE_STOPPED))
+ tasklet_schedule(&q->tasklet);
+ }
}
-/* inbound tasklet */
void qdio_inbound_processing(unsigned long data)
{
struct qdio_q *q = (struct qdio_q *)data;
@@ -627,11 +725,16 @@ void qdio_inbound_processing(unsigned long data)
static int get_outbound_buffer_frontier(struct qdio_q *q)
{
int count, stop;
- unsigned char state;
+ unsigned char state = 0;
- if (((queue_type(q) != QDIO_IQDIO_QFMT) && !pci_out_supported(q)) ||
- (queue_type(q) == QDIO_IQDIO_QFMT && multicast_outbound(q)))
- qdio_siga_sync_q(q);
+ q->timestamp = get_tod_clock_fast();
+
+ if (need_siga_sync(q))
+ if (((queue_type(q) != QDIO_IQDIO_QFMT) &&
+ !pci_out_supported(q)) ||
+ (queue_type(q) == QDIO_IQDIO_QFMT &&
+ multicast_outbound(q)))
+ qdio_siga_sync_q(q);
/*
* Don't check 128 buffers, as otherwise qdio_inbound_q_moved
@@ -639,49 +742,47 @@ static int get_outbound_buffer_frontier(struct qdio_q *q)
*/
count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK);
stop = add_buf(q->first_to_check, count);
-
- /* need to set count to 1 for non-qebsm */
- if (!is_qebsm(q))
- count = 1;
-
-check_next:
if (q->first_to_check == stop)
- return q->first_to_check;
+ goto out;
- count = get_buf_states(q, q->first_to_check, &state, count);
+ count = get_buf_states(q, q->first_to_check, &state, count, 0, 1);
if (!count)
- return q->first_to_check;
+ goto out;
switch (state) {
case SLSB_P_OUTPUT_EMPTY:
/* the adapter got it */
- QDIO_DBF_TEXT5(0, trace, "outpempt");
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr,
+ "out empty:%1d %02x", q->nr, count);
atomic_sub(count, &q->nr_buf_used);
q->first_to_check = add_buf(q->first_to_check, count);
- /*
- * We fetch all buffer states at once. get_buf_states may
- * return count < stop. For QEBSM we do not loop.
- */
- if (is_qebsm(q))
- break;
- goto check_next;
+ if (q->irq_ptr->perf_stat_enabled)
+ account_sbals(q, count);
+
+ break;
case SLSB_P_OUTPUT_ERROR:
- announce_buffer_error(q);
- /* process the buffer, the upper layer will take care of it */
+ process_buffer_error(q, count);
q->first_to_check = add_buf(q->first_to_check, count);
atomic_sub(count, &q->nr_buf_used);
+ if (q->irq_ptr->perf_stat_enabled)
+ account_sbals_error(q, count);
break;
case SLSB_CU_OUTPUT_PRIMED:
/* the adapter has not fetched the output yet */
- QDIO_DBF_TEXT5(0, trace, "outpprim");
+ if (q->irq_ptr->perf_stat_enabled)
+ q->q_stats.nr_sbal_nop++;
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out primed:%1d",
+ q->nr);
break;
case SLSB_P_OUTPUT_NOT_INIT:
case SLSB_P_OUTPUT_HALTED:
break;
default:
- BUG();
+ WARN_ON_ONCE(1);
}
+
+out:
return q->first_to_check;
}
@@ -697,170 +798,87 @@ static inline int qdio_outbound_q_moved(struct qdio_q *q)
bufnr = get_outbound_buffer_frontier(q);
- if ((bufnr != q->last_move_ftc) || q->qdio_error) {
- q->last_move_ftc = bufnr;
- QDIO_DBF_TEXT4(0, trace, "oqhasmvd");
- QDIO_DBF_HEX4(0, trace, &q, sizeof(void *));
+ if (bufnr != q->last_move) {
+ q->last_move = bufnr;
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out moved:%1d", q->nr);
return 1;
} else
return 0;
}
-/*
- * VM could present us cc=2 and busy bit set on SIGA-write
- * during reconfiguration of their Guest LAN (only in iqdio mode,
- * otherwise qdio is asynchronous and cc=2 and busy bit there will take
- * the queues down immediately).
- *
- * 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. 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.
- *
- * Called from outbound tasklet and do_QDIO handler.
- */
-static void qdio_kick_outbound_q(struct qdio_q *q)
+static int qdio_kick_outbound_q(struct qdio_q *q, unsigned long aob)
{
- int rc;
-#ifdef CONFIG_QDIO_DEBUG
- char dbf_text[15];
-
- QDIO_DBF_TEXT5(0, trace, "kickoutq");
- QDIO_DBF_HEX5(0, trace, &q, sizeof(void *));
-#endif /* CONFIG_QDIO_DEBUG */
+ int retries = 0, cc;
+ unsigned int busy_bit;
if (!need_siga_out(q))
- return;
+ return 0;
- rc = qdio_siga_output(q);
- switch (rc) {
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-w:%1d", q->nr);
+retry:
+ qperf_inc(q, siga_write);
+
+ cc = qdio_siga_output(q, &busy_bit, aob);
+ switch (cc) {
case 0:
- /* went smooth this time, reset timestamp */
- q->u.out.timestamp = 0;
-
- /* TODO: improve error handling for CC=0 case */
-#ifdef CONFIG_QDIO_DEBUG
- QDIO_DBF_TEXT3(0, trace, "cc2reslv");
- sprintf(dbf_text, "%4x%2x%2x", q->irq_ptr->schid.sch_no, q->nr,
- atomic_read(&q->u.out.busy_siga_counter));
- QDIO_DBF_TEXT3(0, trace, dbf_text);
-#endif /* CONFIG_QDIO_DEBUG */
break;
- /* cc=2 and busy bit */
- case (2 | QDIO_ERROR_SIGA_BUSY):
- atomic_inc(&q->u.out.busy_siga_counter);
-
- /* if the last siga was successful, save timestamp here */
- if (!q->u.out.timestamp)
- q->u.out.timestamp = get_usecs();
-
- /* if we're in time, don't touch qdio_error */
- if (get_usecs() - q->u.out.timestamp < QDIO_BUSY_BIT_GIVE_UP) {
- tasklet_schedule(&q->tasklet);
- break;
+ case 2:
+ if (busy_bit) {
+ while (++retries < QDIO_BUSY_BIT_RETRIES) {
+ mdelay(QDIO_BUSY_BIT_RETRY_DELAY);
+ goto retry;
+ }
+ DBF_ERROR("%4x cc2 BBC:%1d", SCH_NO(q), q->nr);
+ cc = -EBUSY;
+ } else {
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-w cc2:%1d", q->nr);
+ cc = -ENOBUFS;
}
- QDIO_DBF_TEXT2(0, trace, "cc2REPRT");
-#ifdef CONFIG_QDIO_DEBUG
- sprintf(dbf_text, "%4x%2x%2x", q->irq_ptr->schid.sch_no, q->nr,
- atomic_read(&q->u.out.busy_siga_counter));
- QDIO_DBF_TEXT3(0, trace, dbf_text);
-#endif /* CONFIG_QDIO_DEBUG */
- default:
- /* for plain cc=1, 2 or 3 */
- q->qdio_error = rc;
+ break;
+ case 1:
+ case 3:
+ DBF_ERROR("%4x SIGA-W:%1d", SCH_NO(q), cc);
+ cc = -EIO;
+ break;
}
-}
-
-static void qdio_kick_outbound_handler(struct qdio_q *q)
-{
- int start, end, count;
-#ifdef CONFIG_QDIO_DEBUG
- char dbf_text[15];
-#endif
-
- start = q->first_to_kick;
- end = q->last_move_ftc;
- if (end >= start)
- count = end - start;
- else
- count = end + QDIO_MAX_BUFFERS_PER_Q - start;
-
-#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 (unlikely(q->irq_ptr->state != QDIO_IRQ_STATE_ACTIVE))
- return;
-
- q->handler(q->irq_ptr->cdev, q->qdio_error, q->nr, start, count,
- q->irq_ptr->int_parm);
-
- /* for the next time: */
- q->first_to_kick = q->last_move_ftc;
- q->qdio_error = 0;
+ if (retries) {
+ DBF_ERROR("%4x cc2 BB2:%1d", SCH_NO(q), q->nr);
+ DBF_ERROR("count:%u", retries);
+ }
+ return cc;
}
static void __qdio_outbound_processing(struct qdio_q *q)
{
- int siga_attempts;
-
- qdio_perf_stat_inc(&perf_stats.tasklet_outbound);
-
- /* see comment in qdio_kick_outbound_q */
- siga_attempts = atomic_read(&q->u.out.busy_siga_counter);
- while (siga_attempts--) {
- atomic_dec(&q->u.out.busy_siga_counter);
- qdio_kick_outbound_q(q);
- }
-
- BUG_ON(atomic_read(&q->nr_buf_used) < 0);
+ qperf_inc(q, tasklet_outbound);
+ WARN_ON_ONCE(atomic_read(&q->nr_buf_used) < 0);
if (qdio_outbound_q_moved(q))
- qdio_kick_outbound_handler(q);
+ qdio_kick_handler(q);
- if (queue_type(q) == QDIO_ZFCP_QFMT) {
+ if (queue_type(q) == QDIO_ZFCP_QFMT)
if (!pci_out_supported(q) && !qdio_outbound_q_done(q))
- tasklet_schedule(&q->tasklet);
- return;
- }
-
- /* bail out for HiperSockets unicast queues */
- if (queue_type(q) == QDIO_IQDIO_QFMT && !multicast_outbound(q))
- return;
+ goto sched;
if (q->u.out.pci_out_enabled)
return;
/*
* Now we know that queue type is either qeth without pci enabled
- * or HiperSockets multicast. Make sure buffer switch from PRIMED to
- * EMPTY is noticed and outbound_handler is called after some time.
+ * or HiperSockets. Make sure buffer switch from PRIMED to EMPTY
+ * is noticed and outbound_handler is called after some time.
*/
if (qdio_outbound_q_done(q))
del_timer(&q->u.out.timer);
- else {
- if (!timer_pending(&q->u.out.timer)) {
+ else
+ if (!timer_pending(&q->u.out.timer))
mod_timer(&q->u.out.timer, jiffies + 10 * HZ);
- qdio_perf_stat_inc(&perf_stats.debug_tl_out_timer);
- }
- }
+ return;
+
+sched:
+ if (unlikely(q->irq_ptr->state == QDIO_IRQ_STATE_STOPPED))
+ return;
+ tasklet_schedule(&q->tasklet);
}
/* outbound tasklet */
@@ -873,11 +891,13 @@ void qdio_outbound_processing(unsigned long data)
void qdio_outbound_timer(unsigned long data)
{
struct qdio_q *q = (struct qdio_q *)data;
+
+ if (unlikely(q->irq_ptr->state == QDIO_IRQ_STATE_STOPPED))
+ return;
tasklet_schedule(&q->tasklet);
}
-/* called from thinint inbound tasklet */
-void qdio_check_outbound_after_thinint(struct qdio_q *q)
+static inline void qdio_check_outbound_after_thinint(struct qdio_q *q)
{
struct qdio_q *out;
int i;
@@ -890,30 +910,64 @@ void qdio_check_outbound_after_thinint(struct qdio_q *q)
tasklet_schedule(&out->tasklet);
}
+static void __tiqdio_inbound_processing(struct qdio_q *q)
+{
+ qperf_inc(q, tasklet_inbound);
+ if (need_siga_sync(q) && need_siga_sync_after_ai(q))
+ qdio_sync_queues(q);
+
+ /*
+ * The interrupt could be caused by a PCI request. Check the
+ * PCI capable outbound queues.
+ */
+ qdio_check_outbound_after_thinint(q);
+
+ if (!qdio_inbound_q_moved(q))
+ return;
+
+ qdio_kick_handler(q);
+
+ if (!qdio_inbound_q_done(q)) {
+ qperf_inc(q, tasklet_inbound_resched);
+ if (likely(q->irq_ptr->state != QDIO_IRQ_STATE_STOPPED)) {
+ tasklet_schedule(&q->tasklet);
+ return;
+ }
+ }
+
+ qdio_stop_polling(q);
+ /*
+ * We need to check again to not lose initiative after
+ * resetting the ACK state.
+ */
+ if (!qdio_inbound_q_done(q)) {
+ qperf_inc(q, tasklet_inbound_resched2);
+ if (likely(q->irq_ptr->state != QDIO_IRQ_STATE_STOPPED))
+ tasklet_schedule(&q->tasklet);
+ }
+}
+
+void tiqdio_inbound_processing(unsigned long data)
+{
+ struct qdio_q *q = (struct qdio_q *)data;
+ __tiqdio_inbound_processing(q);
+}
+
static inline void qdio_set_state(struct qdio_irq *irq_ptr,
enum qdio_irq_states state)
{
-#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 */
+ DBF_DEV_EVENT(DBF_INFO, irq_ptr, "newstate: %1d", state);
irq_ptr->state = state;
mb();
}
-static void qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
+static void qdio_irq_check_sense(struct qdio_irq *irq_ptr, 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, trace, irb, 64);
- QDIO_DBF_HEX0(0, trace, irb->ecw, 64);
+ DBF_ERROR("%4x sense:", irq_ptr->schid.sch_no);
+ DBF_ERROR_HEX(irb, 64);
+ DBF_ERROR_HEX(irb->ecw, 64);
}
}
@@ -923,10 +977,23 @@ static void qdio_int_handler_pci(struct qdio_irq *irq_ptr)
int i;
struct qdio_q *q;
- qdio_perf_stat_inc(&perf_stats.pci_int);
+ if (unlikely(irq_ptr->state == QDIO_IRQ_STATE_STOPPED))
+ return;
- for_each_input_queue(irq_ptr, q, i)
- tasklet_schedule(&q->tasklet);
+ for_each_input_queue(irq_ptr, q, i) {
+ if (q->u.in.queue_start_poll) {
+ /* skip if polling is enabled or already in work */
+ if (test_and_set_bit(QDIO_QUEUE_IRQS_DISABLED,
+ &q->u.in.queue_irq_state)) {
+ qperf_inc(q, int_discarded);
+ continue;
+ }
+ q->u.in.queue_start_poll(q->irq_ptr->cdev, q->nr,
+ q->irq_ptr->int_parm);
+ } else {
+ tasklet_schedule(&q->tasklet);
+ }
+ }
if (!(irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED))
return;
@@ -934,10 +1001,8 @@ static void qdio_int_handler_pci(struct qdio_irq *irq_ptr)
for_each_output_queue(irq_ptr, q, i) {
if (qdio_outbound_q_done(q))
continue;
-
- if (!siga_syncs_out_pci(q))
+ if (need_siga_sync(q) && need_siga_sync_out_after_pci(q))
qdio_siga_sync_q(q);
-
tasklet_schedule(&q->tasklet);
}
}
@@ -947,14 +1012,11 @@ static void qdio_handle_activate_check(struct ccw_device *cdev,
{
struct qdio_irq *irq_ptr = cdev->private->qdio_data;
struct qdio_q *q;
- char dbf_text[15];
+ int count;
- 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));
+ DBF_ERROR("%4x ACT CHECK", irq_ptr->schid.sch_no);
+ DBF_ERROR("intp :%lx", intparm);
+ DBF_ERROR("ds: %2x cs:%2x", dstat, cstat);
if (irq_ptr->nr_input_qs) {
q = irq_ptr->input_qs[0];
@@ -964,87 +1026,39 @@ static void qdio_handle_activate_check(struct ccw_device *cdev,
dump_stack();
goto no_handler;
}
- q->handler(q->irq_ptr->cdev, QDIO_ERROR_ACTIVATE_CHECK_CONDITION,
- 0, -1, -1, irq_ptr->int_parm);
+
+ count = sub_buf(q->first_to_check, q->first_to_kick);
+ q->handler(q->irq_ptr->cdev, QDIO_ERROR_ACTIVATE,
+ q->nr, q->first_to_kick, count, irq_ptr->int_parm);
no_handler:
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
+ /*
+ * In case of z/VM LGR (Live Guest Migration) QDIO recovery will happen.
+ * Therefore we call the LGR detection function here.
+ */
+ lgr_info_log();
}
-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_int_error(struct ccw_device *cdev)
+static void qdio_establish_handle_irq(struct ccw_device *cdev, int cstat,
+ int dstat)
{
struct qdio_irq *irq_ptr = cdev->private->qdio_data;
- switch (irq_ptr->state) {
- case QDIO_IRQ_STATE_INACTIVE:
- case QDIO_IRQ_STATE_CLEANUP:
- qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
- break;
- case QDIO_IRQ_STATE_ESTABLISHED:
- case QDIO_IRQ_STATE_ACTIVE:
- 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:
- WARN_ON(1);
- }
- wake_up(&cdev->private->wait_q);
-}
-
-static int qdio_establish_check_errors(struct ccw_device *cdev, int cstat,
- int dstat)
-{
- struct qdio_irq *irq_ptr = cdev->private->qdio_data;
+ DBF_DEV_EVENT(DBF_INFO, irq_ptr, "qest irq");
- if (cstat || (dstat & ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END))) {
- QDIO_DBF_TEXT2(1, setup, "eq:ckcon");
+ if (cstat)
goto error;
- }
-
- if (!(dstat & DEV_STAT_DEV_END)) {
- QDIO_DBF_TEXT2(1, setup, "eq:no de");
+ if (dstat & ~(DEV_STAT_DEV_END | DEV_STAT_CHN_END))
goto error;
- }
-
- if (dstat & ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) {
- QDIO_DBF_TEXT2(1, setup, "eq:badio");
+ if (!(dstat & DEV_STAT_DEV_END))
goto error;
- }
- return 0;
+ qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ESTABLISHED);
+ return;
+
error:
- QDIO_DBF_HEX2(0, trace, &cstat, sizeof(int));
- QDIO_DBF_HEX2(0, trace, &dstat, sizeof(int));
+ DBF_ERROR("%4x EQ:error", irq_ptr->schid.sch_no);
+ DBF_ERROR("ds: %2x cs:%2x", dstat, cstat);
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
- return 1;
-}
-
-static void qdio_establish_handle_irq(struct ccw_device *cdev, int cstat,
- int dstat)
-{
- struct qdio_irq *irq_ptr = cdev->private->qdio_data;
- char dbf_text[15];
-
- 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_check_errors(cdev, cstat, dstat))
- qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ESTABLISHED);
}
/* qdio interrupt handler */
@@ -1053,37 +1067,22 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
{
struct qdio_irq *irq_ptr = cdev->private->qdio_data;
int cstat, dstat;
- char dbf_text[15];
-
- qdio_perf_stat_inc(&perf_stats.qdio_int);
if (!intparm || !irq_ptr) {
- sprintf(dbf_text, "qihd%4x", cdev->private->schid.sch_no);
- QDIO_DBF_TEXT2(1, setup, dbf_text);
+ DBF_ERROR("qint:%4x", cdev->private->schid.sch_no);
return;
}
+ if (irq_ptr->perf_stat_enabled)
+ irq_ptr->perf_stat.qdio_int++;
+
if (IS_ERR(irb)) {
- switch (PTR_ERR(irb)) {
- case -EIO:
- sprintf(dbf_text, "ierr%4x",
- cdev->private->schid.sch_no);
- QDIO_DBF_TEXT2(1, setup, dbf_text);
- qdio_int_error(cdev);
- return;
- case -ETIMEDOUT:
- sprintf(dbf_text, "qtoh%4x",
- cdev->private->schid.sch_no);
- QDIO_DBF_TEXT2(1, setup, dbf_text);
- qdio_int_error(cdev);
- return;
- default:
- WARN_ON(1);
- return;
- }
+ DBF_ERROR("%4x IO error", irq_ptr->schid.sch_no);
+ qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
+ wake_up(&cdev->private->wait_q);
+ return;
}
- qdio_irq_check_sense(irq_ptr->schid, irb);
-
+ qdio_irq_check_sense(irq_ptr, irb);
cstat = irb->scsw.cmd.cstat;
dstat = irb->scsw.cmd.dstat;
@@ -1091,25 +1090,23 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
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_int_handler_pci(irq_ptr);
- /* no state change so no need to wake up wait_q */
return;
}
- if ((cstat & ~SCHN_STAT_PCI) || dstat) {
+ if (cstat || dstat)
qdio_handle_activate_check(cdev, intparm, cstat,
dstat);
- break;
- }
+ break;
+ case QDIO_IRQ_STATE_STOPPED:
+ break;
default:
- WARN_ON(1);
+ WARN_ON_ONCE(1);
}
wake_up(&cdev->private->wait_q);
}
@@ -1117,53 +1114,23 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
/**
* qdio_get_ssqd_desc - get qdio subchannel description
* @cdev: ccw device to get description for
+ * @data: where to store the ssqd
*
- * Returns a pointer to the saved qdio subchannel description,
- * or NULL for not setup qdio devices.
+ * Returns 0 or an error code. The results of the chsc are stored in the
+ * specified structure.
*/
-struct qdio_ssqd_desc *qdio_get_ssqd_desc(struct ccw_device *cdev)
+int qdio_get_ssqd_desc(struct ccw_device *cdev,
+ struct qdio_ssqd_desc *data)
{
- struct qdio_irq *irq_ptr;
- QDIO_DBF_TEXT0(0, setup, "getssqd");
-
- irq_ptr = cdev->private->qdio_data;
- if (!irq_ptr)
- return NULL;
+ if (!cdev || !cdev->private)
+ return -EINVAL;
- return &irq_ptr->ssqd_desc;
+ DBF_EVENT("get ssqd:%4x", cdev->private->schid.sch_no);
+ return qdio_setup_get_ssqd(NULL, &cdev->private->schid, data);
}
EXPORT_SYMBOL_GPL(qdio_get_ssqd_desc);
-/**
- * qdio_cleanup - shutdown queues and free data structures
- * @cdev: associated ccw device
- * @how: use halt or clear to shutdown
- *
- * This function calls qdio_shutdown() for @cdev with method @how
- * and on success qdio_free() for @cdev.
- */
-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 = qdio_free(cdev);
- return rc;
-}
-EXPORT_SYMBOL_GPL(qdio_cleanup);
-
static void qdio_shutdown_queues(struct ccw_device *cdev)
{
struct qdio_irq *irq_ptr = cdev->private->qdio_data;
@@ -1171,11 +1138,11 @@ static void qdio_shutdown_queues(struct ccw_device *cdev)
int i;
for_each_input_queue(irq_ptr, q, i)
- tasklet_disable(&q->tasklet);
+ tasklet_kill(&q->tasklet);
for_each_output_queue(irq_ptr, q, i) {
- tasklet_disable(&q->tasklet);
del_timer(&q->u.out.timer);
+ tasklet_kill(&q->tasklet);
}
}
@@ -1186,15 +1153,16 @@ static void qdio_shutdown_queues(struct ccw_device *cdev)
*/
int qdio_shutdown(struct ccw_device *cdev, int how)
{
- struct qdio_irq *irq_ptr;
+ struct qdio_irq *irq_ptr = cdev->private->qdio_data;
int rc;
unsigned long flags;
- char dbf_text[15];
- irq_ptr = cdev->private->qdio_data;
if (!irq_ptr)
return -ENODEV;
+ WARN_ON_ONCE(irqs_disabled());
+ DBF_EVENT("qshutdown:%4x", cdev->private->schid.sch_no);
+
mutex_lock(&irq_ptr->setup_mutex);
/*
* Subchannel was already shot down. We cannot prevent being called
@@ -1205,13 +1173,15 @@ int qdio_shutdown(struct ccw_device *cdev, int how)
return 0;
}
- sprintf(dbf_text, "qsqs%4x", irq_ptr->schid.sch_no);
- QDIO_DBF_TEXT1(0, trace, dbf_text);
- QDIO_DBF_TEXT0(0, setup, dbf_text);
+ /*
+ * Indicate that the device is going down. Scheduling the queue
+ * tasklets is forbidden from here on.
+ */
+ qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
tiqdio_remove_input_queues(irq_ptr);
qdio_shutdown_queues(cdev);
- qdio_shutdown_debug_entries(irq_ptr, cdev);
+ qdio_shutdown_debug_entries(irq_ptr);
/* cleanup subchannel */
spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
@@ -1222,10 +1192,8 @@ int qdio_shutdown(struct ccw_device *cdev, int how)
/* default behaviour is halt */
rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
if (rc) {
- sprintf(dbf_text, "sher%4x", irq_ptr->schid.sch_no);
- QDIO_DBF_TEXT0(0, setup, dbf_text);
- sprintf(dbf_text, "rc=%d", rc);
- QDIO_DBF_TEXT0(0, setup, dbf_text);
+ DBF_ERROR("%4x SHUTD ERR", irq_ptr->schid.sch_no);
+ DBF_ERROR("rc:%4d", rc);
goto no_cleanup;
}
@@ -1247,7 +1215,6 @@ no_cleanup:
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
mutex_unlock(&irq_ptr->setup_mutex);
- module_put(THIS_MODULE);
if (rc)
return rc;
return 0;
@@ -1260,19 +1227,16 @@ EXPORT_SYMBOL_GPL(qdio_shutdown);
*/
int qdio_free(struct ccw_device *cdev)
{
- struct qdio_irq *irq_ptr;
- char dbf_text[15];
+ struct qdio_irq *irq_ptr = cdev->private->qdio_data;
- irq_ptr = cdev->private->qdio_data;
if (!irq_ptr)
return -ENODEV;
+ DBF_EVENT("qfree:%4x", cdev->private->schid.sch_no);
+ DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf abandoned");
mutex_lock(&irq_ptr->setup_mutex);
- sprintf(dbf_text, "qfqs%4x", irq_ptr->schid.sch_no);
- QDIO_DBF_TEXT1(0, trace, dbf_text);
- QDIO_DBF_TEXT0(0, setup, dbf_text);
-
+ irq_ptr->debug_area = NULL;
cdev->private->qdio_data = NULL;
mutex_unlock(&irq_ptr->setup_mutex);
@@ -1282,44 +1246,14 @@ int qdio_free(struct ccw_device *cdev)
EXPORT_SYMBOL_GPL(qdio_free);
/**
- * qdio_initialize - allocate and establish queues for a qdio subchannel
- * @init_data: initialization data
- *
- * This function first allocates queues via qdio_allocate() and on success
- * establishes them via qdio_establish().
- */
-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)
- return rc;
-
- rc = qdio_establish(init_data);
- if (rc)
- qdio_free(init_data->cdev);
- return rc;
-}
-EXPORT_SYMBOL_GPL(qdio_initialize);
-
-/**
* qdio_allocate - allocate qdio queues and associated data
* @init_data: initialization data
*/
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);
+ DBF_EVENT("qallocate:%4x", init_data->cdev->private->schid.sch_no);
if ((init_data->no_input_qs && !init_data->input_handler) ||
(init_data->no_output_qs && !init_data->output_handler))
@@ -1333,16 +1267,14 @@ int qdio_allocate(struct qdio_initialize *init_data)
(!init_data->output_sbal_addr_array))
return -EINVAL;
- qdio_allocate_do_dbf(init_data);
-
/* irq_ptr must be in GFP_DMA since it contains ccw1.cda */
irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!irq_ptr)
goto out_err;
- QDIO_DBF_TEXT0(0, setup, "irq_ptr:");
- QDIO_DBF_HEX0(0, setup, &irq_ptr, sizeof(void *));
mutex_init(&irq_ptr->setup_mutex);
+ if (qdio_allocate_dbf(init_data, irq_ptr))
+ goto out_rel;
/*
* Allocate a page for the chsc calls in qdio_establish.
@@ -1355,13 +1287,9 @@ int qdio_allocate(struct qdio_initialize *init_data)
goto out_rel;
/* qdr is used in ccw1.cda which is u32 */
- irq_ptr->qdr = kzalloc(sizeof(struct qdr), GFP_KERNEL | GFP_DMA);
+ irq_ptr->qdr = (struct qdr *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!irq_ptr->qdr)
goto out_rel;
- WARN_ON((unsigned long)irq_ptr->qdr & 0xfff);
-
- QDIO_DBF_TEXT0(0, setup, "qdr:");
- QDIO_DBF_HEX0(0, setup, &irq_ptr->qdr, sizeof(void *));
if (qdio_allocate_qs(irq_ptr, init_data->no_input_qs,
init_data->no_output_qs))
@@ -1377,18 +1305,39 @@ out_err:
}
EXPORT_SYMBOL_GPL(qdio_allocate);
+static void qdio_detect_hsicq(struct qdio_irq *irq_ptr)
+{
+ struct qdio_q *q = irq_ptr->input_qs[0];
+ int i, use_cq = 0;
+
+ if (irq_ptr->nr_input_qs > 1 && queue_type(q) == QDIO_IQDIO_QFMT)
+ use_cq = 1;
+
+ for_each_output_queue(irq_ptr, q, i) {
+ if (use_cq) {
+ if (qdio_enable_async_operation(&q->u.out) < 0) {
+ use_cq = 0;
+ continue;
+ }
+ } else
+ qdio_disable_async_operation(&q->u.out);
+ }
+ DBF_EVENT("use_cq:%d", use_cq);
+}
+
/**
* qdio_establish - establish queues on a qdio subchannel
* @init_data: initialization data
*/
int qdio_establish(struct qdio_initialize *init_data)
{
- char dbf_text[20];
struct qdio_irq *irq_ptr;
struct ccw_device *cdev = init_data->cdev;
unsigned long saveflags;
int rc;
+ DBF_EVENT("qestablish:%4x", cdev->private->schid.sch_no);
+
irq_ptr = cdev->private->qdio_data;
if (!irq_ptr)
return -ENODEV;
@@ -1396,13 +1345,6 @@ int qdio_establish(struct qdio_initialize *init_data)
if (cdev->private->state != DEV_STATE_ONLINE)
return -EINVAL;
- if (!try_module_get(THIS_MODULE))
- return -EINVAL;
-
- sprintf(dbf_text, "qest%4x", cdev->private->schid.sch_no);
- QDIO_DBF_TEXT0(0, setup, dbf_text);
- QDIO_DBF_TEXT0(0, trace, dbf_text);
-
mutex_lock(&irq_ptr->setup_mutex);
qdio_setup_irq(init_data);
@@ -1424,10 +1366,8 @@ int qdio_establish(struct qdio_initialize *init_data)
rc = ccw_device_start(cdev, &irq_ptr->ccw, QDIO_DOING_ESTABLISH, 0, 0);
if (rc) {
- sprintf(dbf_text, "eq:io%4x", irq_ptr->schid.sch_no);
- QDIO_DBF_TEXT2(1, setup, dbf_text);
- sprintf(dbf_text, "eq:rc%4x", rc);
- QDIO_DBF_TEXT2(1, setup, dbf_text);
+ DBF_ERROR("%4x est IO ERR", irq_ptr->schid.sch_no);
+ DBF_ERROR("rc:%4x", rc);
}
spin_unlock_irqrestore(get_ccwdev_lock(cdev), saveflags);
@@ -1448,8 +1388,8 @@ int qdio_establish(struct qdio_initialize *init_data)
}
qdio_setup_ssqd_info(irq_ptr);
- sprintf(dbf_text, "qib ac%2x", irq_ptr->qib.ac);
- QDIO_DBF_TEXT2(0, setup, dbf_text);
+
+ qdio_detect_hsicq(irq_ptr);
/* qebsm is now setup if available, initialize buffer states */
qdio_init_buf_states(irq_ptr);
@@ -1470,7 +1410,8 @@ int qdio_activate(struct ccw_device *cdev)
struct qdio_irq *irq_ptr;
int rc;
unsigned long saveflags;
- char dbf_text[20];
+
+ DBF_EVENT("qactivate:%4x", cdev->private->schid.sch_no);
irq_ptr = cdev->private->qdio_data;
if (!irq_ptr)
@@ -1485,10 +1426,6 @@ int qdio_activate(struct ccw_device *cdev)
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);
-
irq_ptr->ccw.cmd_code = irq_ptr->aqueue.cmd;
irq_ptr->ccw.flags = CCW_FLAG_SLI;
irq_ptr->ccw.count = irq_ptr->aqueue.count;
@@ -1500,10 +1437,8 @@ int qdio_activate(struct ccw_device *cdev)
rc = ccw_device_start(cdev, &irq_ptr->ccw, QDIO_DOING_ACTIVATE,
0, DOIO_DENY_PREFETCH);
if (rc) {
- sprintf(dbf_text, "aq:io%4x", irq_ptr->schid.sch_no);
- QDIO_DBF_TEXT2(1, setup, dbf_text);
- sprintf(dbf_text, "aq:rc%4x", rc);
- QDIO_DBF_TEXT2(1, setup, dbf_text);
+ DBF_ERROR("%4x act IO ERR", irq_ptr->schid.sch_no);
+ DBF_ERROR("rc:%4x", rc);
}
spin_unlock_irqrestore(get_ccwdev_lock(cdev), saveflags);
@@ -1519,9 +1454,8 @@ int qdio_activate(struct ccw_device *cdev)
switch (irq_ptr->state) {
case QDIO_IRQ_STATE_STOPPED:
case QDIO_IRQ_STATE_ERR:
- mutex_unlock(&irq_ptr->setup_mutex);
- qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
- return -EIO;
+ rc = -EIO;
+ break;
default:
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
rc = 0;
@@ -1558,39 +1492,48 @@ static inline int buf_in_between(int bufnr, int start, int count)
* @bufnr: first buffer to process
* @count: how many buffers are emptied
*/
-static void handle_inbound(struct qdio_q *q, unsigned int callflags,
- int bufnr, int count)
+static int handle_inbound(struct qdio_q *q, unsigned int callflags,
+ int bufnr, int count)
{
- unsigned long flags;
- int used, rc;
+ int diff;
- /*
- * do_QDIO could run in parallel with the queue tasklet so the
- * upper-layer programm could empty the ACK'ed buffer here.
- * If that happens we must clear the polling flag, otherwise
- * qdio_stop_polling() could set the buffer to NOT_INIT after
- * it was set to EMPTY which would kill us.
- */
- spin_lock_irqsave(&q->u.in.lock, flags);
- if (q->u.in.polling)
- if (buf_in_between(q->last_move_ftc, bufnr, count))
+ qperf_inc(q, inbound_call);
+
+ if (!q->u.in.polling)
+ goto set;
+
+ /* protect against stop polling setting an ACK for an emptied slsb */
+ if (count == QDIO_MAX_BUFFERS_PER_Q) {
+ /* overwriting everything, just delete polling status */
+ q->u.in.polling = 0;
+ q->u.in.ack_count = 0;
+ goto set;
+ } else if (buf_in_between(q->u.in.ack_start, bufnr, count)) {
+ if (is_qebsm(q)) {
+ /* partial overwrite, just update ack_start */
+ diff = add_buf(bufnr, count);
+ diff = sub_buf(diff, q->u.in.ack_start);
+ q->u.in.ack_count -= diff;
+ if (q->u.in.ack_count <= 0) {
+ q->u.in.polling = 0;
+ q->u.in.ack_count = 0;
+ goto set;
+ }
+ q->u.in.ack_start = add_buf(q->u.in.ack_start, diff);
+ }
+ else
+ /* the only ACK will be deleted, so stop polling */
q->u.in.polling = 0;
+ }
+set:
count = set_buf_states(q, bufnr, SLSB_CU_INPUT_EMPTY, count);
- spin_unlock_irqrestore(&q->u.in.lock, flags);
+ atomic_add(count, &q->nr_buf_used);
- used = atomic_add_return(count, &q->nr_buf_used) - count;
- BUG_ON(used + count > QDIO_MAX_BUFFERS_PER_Q);
-
- /* no need to signal as long as the adapter had free buffers */
- if (used)
- return;
+ if (need_siga_in(q))
+ return qdio_siga_input(q);
- if (need_siga_in(q)) {
- rc = qdio_siga_input(q);
- if (rc)
- q->qdio_error = rc;
- }
+ return 0;
}
/**
@@ -1600,52 +1543,54 @@ static void handle_inbound(struct qdio_q *q, unsigned int callflags,
* @bufnr: first buffer to process
* @count: how many buffers are filled
*/
-static void handle_outbound(struct qdio_q *q, unsigned int callflags,
- int bufnr, int count)
+static int handle_outbound(struct qdio_q *q, unsigned int callflags,
+ int bufnr, int count)
{
- unsigned char state;
- int used;
+ unsigned char state = 0;
+ int used, rc = 0;
- qdio_perf_stat_inc(&perf_stats.outbound_handler);
+ qperf_inc(q, outbound_call);
count = set_buf_states(q, bufnr, SLSB_CU_OUTPUT_PRIMED, count);
used = atomic_add_return(count, &q->nr_buf_used);
- BUG_ON(used > QDIO_MAX_BUFFERS_PER_Q);
- if (callflags & QDIO_FLAG_PCI_OUT)
+ if (used == QDIO_MAX_BUFFERS_PER_Q)
+ qperf_inc(q, outbound_queue_full);
+
+ if (callflags & QDIO_FLAG_PCI_OUT) {
q->u.out.pci_out_enabled = 1;
- else
+ qperf_inc(q, pci_request_int);
+ } else
q->u.out.pci_out_enabled = 0;
if (queue_type(q) == QDIO_IQDIO_QFMT) {
- if (multicast_outbound(q))
- qdio_kick_outbound_q(q);
- else
- /*
- * One siga-w per buffer required for unicast
- * HiperSockets.
- */
- while (count--)
- qdio_kick_outbound_q(q);
- goto out;
- }
+ unsigned long phys_aob = 0;
- if (need_siga_sync(q)) {
- qdio_siga_sync_q(q);
- goto out;
- }
+ /* One SIGA-W per buffer required for unicast HSI */
+ WARN_ON_ONCE(count > 1 && !multicast_outbound(q));
+
+ phys_aob = qdio_aob_for_buffer(&q->u.out, bufnr);
- /* try to fast requeue buffers */
- get_buf_state(q, prev_buf(bufnr), &state);
- if (state != SLSB_CU_OUTPUT_PRIMED)
- qdio_kick_outbound_q(q);
- else {
- QDIO_DBF_TEXT5(0, trace, "fast-req");
- qdio_perf_stat_inc(&perf_stats.fast_requeue);
+ rc = qdio_kick_outbound_q(q, phys_aob);
+ } else if (need_siga_sync(q)) {
+ rc = qdio_siga_sync_q(q);
+ } else {
+ /* try to fast requeue buffers */
+ get_buf_state(q, prev_buf(bufnr), &state, 0);
+ if (state != SLSB_CU_OUTPUT_PRIMED)
+ rc = qdio_kick_outbound_q(q, 0);
+ else
+ qperf_inc(q, fast_requeue);
}
-out:
- /* Fixme: could wait forever if called from process context */
- tasklet_schedule(&q->tasklet);
+
+ /* in case of SIGA errors we must process the error immediately */
+ if (used >= q->u.out.scan_threshold || rc)
+ tasklet_schedule(&q->tasklet);
+ else
+ /* free the SBALs in case of no further traffic */
+ if (!timer_pending(&q->u.out.timer))
+ mod_timer(&q->u.out.timer, jiffies + HZ);
+ return rc;
}
/**
@@ -1657,88 +1602,269 @@ out:
* @count: how many buffers to process
*/
int do_QDIO(struct ccw_device *cdev, unsigned int callflags,
- int q_nr, int bufnr, int count)
+ int q_nr, unsigned int bufnr, unsigned int count)
{
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 ((bufnr > QDIO_MAX_BUFFERS_PER_Q) ||
- (count > QDIO_MAX_BUFFERS_PER_Q) ||
- (q_nr > QDIO_MAX_QUEUES_PER_IRQ))
+ if (bufnr >= QDIO_MAX_BUFFERS_PER_Q || count > QDIO_MAX_BUFFERS_PER_Q)
return -EINVAL;
+ irq_ptr = cdev->private->qdio_data;
+ if (!irq_ptr)
+ return -ENODEV;
+
+ DBF_DEV_EVENT(DBF_INFO, irq_ptr,
+ "do%02x b:%02x c:%02x", callflags, bufnr, count);
+
+ if (irq_ptr->state != QDIO_IRQ_STATE_ACTIVE)
+ return -EIO;
if (!count)
return 0;
+ if (callflags & QDIO_FLAG_SYNC_INPUT)
+ return handle_inbound(irq_ptr->input_qs[q_nr],
+ callflags, bufnr, count);
+ else if (callflags & QDIO_FLAG_SYNC_OUTPUT)
+ return handle_outbound(irq_ptr->output_qs[q_nr],
+ callflags, bufnr, count);
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(do_QDIO);
+
+/**
+ * qdio_start_irq - process input buffers
+ * @cdev: associated ccw_device for the qdio subchannel
+ * @nr: input queue number
+ *
+ * Return codes
+ * 0 - success
+ * 1 - irqs not started since new data is available
+ */
+int qdio_start_irq(struct ccw_device *cdev, int nr)
+{
+ struct qdio_q *q;
+ struct qdio_irq *irq_ptr = cdev->private->qdio_data;
- irq_ptr = cdev->private->qdio_data;
if (!irq_ptr)
return -ENODEV;
+ q = irq_ptr->input_qs[nr];
-#ifdef CONFIG_QDIO_DEBUG
- if (callflags & QDIO_FLAG_SYNC_INPUT)
- QDIO_DBF_HEX3(0, trace, &irq_ptr->input_qs[q_nr],
- sizeof(void *));
+ clear_nonshared_ind(irq_ptr);
+ qdio_stop_polling(q);
+ clear_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state);
+
+ /*
+ * We need to check again to not lose initiative after
+ * resetting the ACK state.
+ */
+ if (test_nonshared_ind(irq_ptr))
+ goto rescan;
+ if (!qdio_inbound_q_done(q))
+ goto rescan;
+ return 0;
+
+rescan:
+ if (test_and_set_bit(QDIO_QUEUE_IRQS_DISABLED,
+ &q->u.in.queue_irq_state))
+ return 0;
else
- QDIO_DBF_HEX3(0, trace, &irq_ptr->output_qs[q_nr],
- sizeof(void *));
+ return 1;
- sprintf(dbf_text, "flag%04x", callflags);
- QDIO_DBF_TEXT3(0, trace, dbf_text);
- sprintf(dbf_text, "qi%02xct%02x", bufnr, count);
- QDIO_DBF_TEXT3(0, trace, dbf_text);
-#endif /* CONFIG_QDIO_DEBUG */
+}
+EXPORT_SYMBOL(qdio_start_irq);
- if (irq_ptr->state != QDIO_IRQ_STATE_ACTIVE)
- return -EBUSY;
+/**
+ * qdio_get_next_buffers - process input buffers
+ * @cdev: associated ccw_device for the qdio subchannel
+ * @nr: input queue number
+ * @bufnr: first filled buffer number
+ * @error: buffers are in error state
+ *
+ * Return codes
+ * < 0 - error
+ * = 0 - no new buffers found
+ * > 0 - number of processed buffers
+ */
+int qdio_get_next_buffers(struct ccw_device *cdev, int nr, int *bufnr,
+ int *error)
+{
+ struct qdio_q *q;
+ int start, end;
+ struct qdio_irq *irq_ptr = cdev->private->qdio_data;
- if (callflags & QDIO_FLAG_SYNC_INPUT)
- handle_inbound(irq_ptr->input_qs[q_nr],
- callflags, bufnr, count);
- else if (callflags & QDIO_FLAG_SYNC_OUTPUT)
- handle_outbound(irq_ptr->output_qs[q_nr],
- callflags, bufnr, count);
- else {
- QDIO_DBF_TEXT3(1, trace, "doQD:inv");
- return -EINVAL;
- }
- return 0;
+ if (!irq_ptr)
+ return -ENODEV;
+ q = irq_ptr->input_qs[nr];
+
+ /*
+ * Cannot rely on automatic sync after interrupt since queues may
+ * also be examined without interrupt.
+ */
+ if (need_siga_sync(q))
+ qdio_sync_queues(q);
+
+ /* check the PCI capable outbound queues. */
+ qdio_check_outbound_after_thinint(q);
+
+ if (!qdio_inbound_q_moved(q))
+ return 0;
+
+ /* Note: upper-layer MUST stop processing immediately here ... */
+ if (unlikely(q->irq_ptr->state != QDIO_IRQ_STATE_ACTIVE))
+ return -EIO;
+
+ start = q->first_to_kick;
+ end = q->first_to_check;
+ *bufnr = start;
+ *error = q->qdio_error;
+
+ /* for the next time */
+ q->first_to_kick = end;
+ q->qdio_error = 0;
+ return sub_buf(end, start);
}
-EXPORT_SYMBOL_GPL(do_QDIO);
+EXPORT_SYMBOL(qdio_get_next_buffers);
+
+/**
+ * qdio_stop_irq - disable interrupt processing for the device
+ * @cdev: associated ccw_device for the qdio subchannel
+ * @nr: input queue number
+ *
+ * Return codes
+ * 0 - interrupts were already disabled
+ * 1 - interrupts successfully disabled
+ */
+int qdio_stop_irq(struct ccw_device *cdev, int nr)
+{
+ struct qdio_q *q;
+ struct qdio_irq *irq_ptr = cdev->private->qdio_data;
+
+ if (!irq_ptr)
+ return -ENODEV;
+ q = irq_ptr->input_qs[nr];
+
+ if (test_and_set_bit(QDIO_QUEUE_IRQS_DISABLED,
+ &q->u.in.queue_irq_state))
+ return 0;
+ else
+ return 1;
+}
+EXPORT_SYMBOL(qdio_stop_irq);
+
+/**
+ * qdio_pnso_brinfo() - perform network subchannel op #0 - bridge info.
+ * @schid: Subchannel ID.
+ * @cnc: Boolean Change-Notification Control
+ * @response: Response code will be stored at this address
+ * @cb: Callback function will be executed for each element
+ * of the address list
+ * @priv: Pointer passed from the caller to qdio_pnso_brinfo()
+ * @type: Type of the address entry passed to the callback
+ * @entry: Entry containg the address of the specified type
+ * @priv: Pointer to pass to the callback function.
+ *
+ * Performs "Store-network-bridging-information list" operation and calls
+ * the callback function for every entry in the list. If "change-
+ * notification-control" is set, further changes in the address list
+ * will be reported via the IPA command.
+ */
+int qdio_pnso_brinfo(struct subchannel_id schid,
+ int cnc, u16 *response,
+ void (*cb)(void *priv, enum qdio_brinfo_entry_type type,
+ void *entry),
+ void *priv)
+{
+ struct chsc_pnso_area *rr;
+ int rc;
+ u32 prev_instance = 0;
+ int isfirstblock = 1;
+ int i, size, elems;
+
+ rr = (struct chsc_pnso_area *)get_zeroed_page(GFP_KERNEL);
+ if (rr == NULL)
+ return -ENOMEM;
+ do {
+ /* on the first iteration, naihdr.resume_token will be zero */
+ rc = chsc_pnso_brinfo(schid, rr, rr->naihdr.resume_token, cnc);
+ if (rc != 0 && rc != -EBUSY)
+ goto out;
+ if (rr->response.code != 1) {
+ rc = -EIO;
+ continue;
+ } else
+ rc = 0;
+
+ if (cb == NULL)
+ continue;
+
+ size = rr->naihdr.naids;
+ elems = (rr->response.length -
+ sizeof(struct chsc_header) -
+ sizeof(struct chsc_brinfo_naihdr)) /
+ size;
+
+ if (!isfirstblock && (rr->naihdr.instance != prev_instance)) {
+ /* Inform the caller that they need to scrap */
+ /* the data that was already reported via cb */
+ rc = -EAGAIN;
+ break;
+ }
+ isfirstblock = 0;
+ prev_instance = rr->naihdr.instance;
+ for (i = 0; i < elems; i++)
+ switch (size) {
+ case sizeof(struct qdio_brinfo_entry_l3_ipv6):
+ (*cb)(priv, l3_ipv6_addr,
+ &rr->entries.l3_ipv6[i]);
+ break;
+ case sizeof(struct qdio_brinfo_entry_l3_ipv4):
+ (*cb)(priv, l3_ipv4_addr,
+ &rr->entries.l3_ipv4[i]);
+ break;
+ case sizeof(struct qdio_brinfo_entry_l2):
+ (*cb)(priv, l2_addr_lnid,
+ &rr->entries.l2[i]);
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ rc = -EIO;
+ goto out;
+ }
+ } while (rr->response.code == 0x0107 || /* channel busy */
+ (rr->response.code == 1 && /* list stored */
+ /* resume token is non-zero => list incomplete */
+ (rr->naihdr.resume_token.t1 || rr->naihdr.resume_token.t2)));
+ (*response) = rr->response.code;
+
+out:
+ free_page((unsigned long)rr);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(qdio_pnso_brinfo);
static int __init init_QDIO(void)
{
int rc;
- rc = qdio_setup_init();
+ rc = qdio_debug_init();
if (rc)
return rc;
+ rc = qdio_setup_init();
+ if (rc)
+ goto out_debug;
rc = tiqdio_allocate_memory();
if (rc)
goto out_cache;
- rc = qdio_debug_init();
- if (rc)
- goto out_ti;
- rc = qdio_setup_perf_stats();
- if (rc)
- goto out_debug;
rc = tiqdio_register_thinints();
if (rc)
- goto out_perf;
+ goto out_ti;
return 0;
-out_perf:
- qdio_remove_perf_stats();
-out_debug:
- qdio_debug_exit();
out_ti:
tiqdio_free_memory();
out_cache:
qdio_setup_exit();
+out_debug:
+ qdio_debug_exit();
return rc;
}
@@ -1746,9 +1872,8 @@ static void __exit exit_QDIO(void)
{
tiqdio_unregister_thinints();
tiqdio_free_memory();
- qdio_remove_perf_stats();
- qdio_debug_exit();
qdio_setup_exit();
+ qdio_debug_exit();
}
module_init(init_QDIO);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-09 05:39:26 +0000