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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.c79
1 files changed, 34 insertions, 45 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index f8b897b7e78b..02ced5949287 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -393,19 +393,15 @@ int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
static inline void qdio_stop_polling(struct qdio_q *q)
{
- if (!q->u.in.polling)
+ if (!q->u.in.ack_count)
return;
- q->u.in.polling = 0;
qperf_inc(q, stop_polling);
/* show the card that we are not polling anymore */
- 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);
+ 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;
}
static inline void account_sbals(struct qdio_q *q, unsigned int count)
@@ -451,8 +447,7 @@ static inline void inbound_primed(struct qdio_q *q, unsigned int start,
/* for QEBSM the ACK was already set by EQBS */
if (is_qebsm(q)) {
- if (!q->u.in.polling) {
- q->u.in.polling = 1;
+ if (!q->u.in.ack_count) {
q->u.in.ack_count = count;
q->u.in.ack_start = start;
return;
@@ -471,12 +466,12 @@ static inline void inbound_primed(struct qdio_q *q, unsigned int start,
* or by the next inbound run.
*/
new = add_buf(start, count - 1);
- if (q->u.in.polling) {
+ if (q->u.in.ack_count) {
/* 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;
+ q->u.in.ack_count = 1;
set_buf_state(q, new, SLSB_P_INPUT_ACK);
}
@@ -955,19 +950,14 @@ static void qdio_int_handler_pci(struct qdio_irq *irq_ptr)
if (unlikely(irq_ptr->state != QDIO_IRQ_STATE_ACTIVE))
return;
- 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)) {
- QDIO_PERF_STAT_INC(irq_ptr, int_discarded);
- continue;
- }
- q->u.in.queue_start_poll(q->irq_ptr->cdev, q->nr,
- q->irq_ptr->int_parm);
- } else {
+ if (irq_ptr->irq_poll) {
+ if (!test_and_set_bit(QDIO_IRQ_DISABLED, &irq_ptr->poll_state))
+ irq_ptr->irq_poll(irq_ptr->cdev, irq_ptr->int_parm);
+ else
+ QDIO_PERF_STAT_INC(irq_ptr, int_discarded);
+ } else {
+ for_each_input_queue(irq_ptr, q, i)
tasklet_schedule(&q->tasklet);
- }
}
if (!pci_out_supported(irq_ptr) || !irq_ptr->scan_threshold)
@@ -1479,13 +1469,12 @@ static int handle_inbound(struct qdio_q *q, unsigned int callflags,
qperf_inc(q, inbound_call);
- if (!q->u.in.polling)
+ if (!q->u.in.ack_count)
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)) {
@@ -1495,15 +1484,14 @@ static int handle_inbound(struct qdio_q *q, unsigned int callflags,
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 */
+ q->u.in.ack_count = 0;
}
- else
- /* the only ACK will be deleted, so stop polling */
- q->u.in.polling = 0;
}
set:
@@ -1617,24 +1605,26 @@ 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)
+int qdio_start_irq(struct ccw_device *cdev)
{
struct qdio_q *q;
struct qdio_irq *irq_ptr = cdev->private->qdio_data;
+ unsigned int i;
if (!irq_ptr)
return -ENODEV;
- q = irq_ptr->input_qs[nr];
clear_nonshared_ind(irq_ptr);
- qdio_stop_polling(q);
- clear_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state);
+
+ for_each_input_queue(irq_ptr, q, i)
+ qdio_stop_polling(q);
+
+ clear_bit(QDIO_IRQ_DISABLED, &irq_ptr->poll_state);
/*
* We need to check again to not lose initiative after
@@ -1642,13 +1632,16 @@ int qdio_start_irq(struct ccw_device *cdev, int nr)
*/
if (test_nonshared_ind(irq_ptr))
goto rescan;
- if (!qdio_inbound_q_done(q, q->first_to_check))
- goto rescan;
+
+ for_each_input_queue(irq_ptr, q, i) {
+ if (!qdio_inbound_q_done(q, q->first_to_check))
+ goto rescan;
+ }
+
return 0;
rescan:
- if (test_and_set_bit(QDIO_QUEUE_IRQS_DISABLED,
- &q->u.in.queue_irq_state))
+ if (test_and_set_bit(QDIO_IRQ_DISABLED, &irq_ptr->poll_state))
return 0;
else
return 1;
@@ -1736,23 +1729,19 @@ 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)
+int qdio_stop_irq(struct ccw_device *cdev)
{
- 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))
+ if (test_and_set_bit(QDIO_IRQ_DISABLED, &irq_ptr->poll_state))
return 0;
else
return 1;
generated by cgit v1.2.3 (git 2.39.0) at 2025-08-05 03:12:12 +0300