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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.c208
1 files changed, 180 insertions, 28 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 288c9140290e..9a122280246c 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -14,6 +14,7 @@
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/gfp.h>
+#include <linux/io.h>
#include <linux/kernel_stat.h>
#include <linux/atomic.h>
#include <asm/debug.h>
@@ -77,11 +78,13 @@ static inline int do_siga_input(unsigned long schid, unsigned int mask,
* Note: For IQDC unicast queues only the highest priority queue is processed.
*/
static inline int do_siga_output(unsigned long schid, unsigned long mask,
- unsigned int *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;
+ register unsigned long __aob asm("3") = aob;
int cc = QDIO_ERROR_SIGA_ACCESS_EXCEPTION;
asm volatile(
@@ -90,7 +93,8 @@ static inline int do_siga_output(unsigned long schid, unsigned long mask,
" srl %0,28\n"
"1:\n"
EX_TABLE(0b, 1b)
- : "+d" (cc), "+d" (__fc), "+d" (__schid), "+d" (__mask)
+ : "+d" (cc), "+d" (__fc), "+d" (__schid), "+d" (__mask),
+ "+d" (__aob)
: : "cc", "memory");
*bb = ((unsigned int) __fc) >> 31;
return cc;
@@ -212,7 +216,7 @@ again:
/* 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,
- int auto_ack)
+ int auto_ack, int merge_pending)
{
unsigned char __state = 0;
int i;
@@ -224,9 +228,14 @@ static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr,
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);
}
@@ -237,7 +246,7 @@ static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr,
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, auto_ack);
+ return get_buf_states(q, bufnr, state, 1, auto_ack, 0);
}
/* wrap-around safe setting of slsb states, returns number of changed buffers */
@@ -308,19 +317,28 @@ static inline int qdio_siga_sync_q(struct qdio_q *q)
return qdio_siga_sync(q, q->mask, 0);
}
-static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit)
+static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit,
+ unsigned long aob)
{
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;
+
+ if (q->u.out.use_cq && aob != 0) {
+ fc = QDIO_SIGA_WRITEQ;
+ laob = aob;
+ }
if (is_qebsm(q)) {
schid = q->irq_ptr->sch_token;
fc |= QDIO_SIGA_QEBSM_FLAG;
}
again:
- cc = do_siga_output(schid, q->mask, busy_bit, fc);
+ 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);
/* hipersocket busy condition */
if (unlikely(*busy_bit)) {
@@ -379,7 +397,7 @@ int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
{
if (need_siga_sync(q))
qdio_siga_sync_q(q);
- return get_buf_states(q, bufnr, state, 1, 0);
+ return get_buf_states(q, bufnr, state, 1, 0, 0);
}
static inline void qdio_stop_polling(struct qdio_q *q)
@@ -507,7 +525,7 @@ static int get_inbound_buffer_frontier(struct qdio_q *q)
* 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);
+ count = get_buf_states(q, q->first_to_check, &state, count, 1, 0);
if (!count)
goto out;
@@ -590,6 +608,107 @@ static inline int qdio_inbound_q_done(struct qdio_q *q)
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_trace_aob(struct qdio_irq *irq, struct qdio_q *q,
+ int i, struct qaob *aob)
+{
+ int tmp;
+
+ DBF_DEV_EVENT(DBF_INFO, irq, "AOB%d:%lx", i,
+ (unsigned long) virt_to_phys(aob));
+ DBF_DEV_EVENT(DBF_INFO, irq, "RES00:%lx",
+ (unsigned long) aob->res0[0]);
+ DBF_DEV_EVENT(DBF_INFO, irq, "RES01:%lx",
+ (unsigned long) aob->res0[1]);
+ DBF_DEV_EVENT(DBF_INFO, irq, "RES02:%lx",
+ (unsigned long) aob->res0[2]);
+ DBF_DEV_EVENT(DBF_INFO, irq, "RES03:%lx",
+ (unsigned long) aob->res0[3]);
+ DBF_DEV_EVENT(DBF_INFO, irq, "RES04:%lx",
+ (unsigned long) aob->res0[4]);
+ DBF_DEV_EVENT(DBF_INFO, irq, "RES05:%lx",
+ (unsigned long) aob->res0[5]);
+ DBF_DEV_EVENT(DBF_INFO, irq, "RES1:%x", aob->res1);
+ DBF_DEV_EVENT(DBF_INFO, irq, "RES2:%x", aob->res2);
+ DBF_DEV_EVENT(DBF_INFO, irq, "RES3:%x", aob->res3);
+ DBF_DEV_EVENT(DBF_INFO, irq, "AORC:%u", aob->aorc);
+ DBF_DEV_EVENT(DBF_INFO, irq, "FLAGS:%u", aob->flags);
+ DBF_DEV_EVENT(DBF_INFO, irq, "CBTBS:%u", aob->cbtbs);
+ DBF_DEV_EVENT(DBF_INFO, irq, "SBC:%u", aob->sb_count);
+ for (tmp = 0; tmp < QDIO_MAX_ELEMENTS_PER_BUFFER; ++tmp) {
+ DBF_DEV_EVENT(DBF_INFO, irq, "SBA%d:%lx", tmp,
+ (unsigned long) aob->sba[tmp]);
+ DBF_DEV_EVENT(DBF_INFO, irq, "rSBA%d:%lx", tmp,
+ (unsigned long) q->sbal[i]->element[tmp].addr);
+ DBF_DEV_EVENT(DBF_INFO, irq, "DC%d:%u", tmp, aob->dcount[tmp]);
+ DBF_DEV_EVENT(DBF_INFO, irq, "rDC%d:%u", tmp,
+ q->sbal[i]->element[tmp].length);
+ }
+ DBF_DEV_EVENT(DBF_INFO, irq, "USER0:%lx", (unsigned long) aob->user0);
+ for (tmp = 0; tmp < 2; ++tmp) {
+ DBF_DEV_EVENT(DBF_INFO, irq, "RES4%d:%lx", tmp,
+ (unsigned long) aob->res4[tmp]);
+ }
+ DBF_DEV_EVENT(DBF_INFO, irq, "USER1:%lx", (unsigned long) aob->user1);
+ DBF_DEV_EVENT(DBF_INFO, irq, "USER2:%lx", (unsigned long) aob->user2);
+}
+
+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;
+
+ BUG_ON(q->u.out.sbal_state == NULL);
+ 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) {
+ BUG_ON(q->u.out.sbal_state == NULL);
+ q->u.out.sbal_state[b].aob = NULL;
+ }
+ b = next_buf(b);
+ }
+}
+
+static inline unsigned long qdio_aob_for_buffer(struct qdio_output_q *q,
+ int bufnr)
+{
+ unsigned long phys_aob = 0;
+
+ if (!q->use_cq)
+ goto out;
+
+ if (!q->aobs[bufnr]) {
+ struct qaob *aob = qdio_allocate_aob();
+ q->aobs[bufnr] = aob;
+ }
+ if (q->aobs[bufnr]) {
+ BUG_ON(q->sbal_state == NULL);
+ 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]);
+ BUG_ON(phys_aob & 0xFF);
+ }
+
+out:
+ return phys_aob;
+}
+
static void qdio_kick_handler(struct qdio_q *q)
{
int start = q->first_to_kick;
@@ -610,6 +729,8 @@ static void qdio_kick_handler(struct qdio_q *q)
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);
@@ -672,23 +793,26 @@ 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);
-
if (q->first_to_check == stop)
- return q->first_to_check;
+ goto out;
- count = get_buf_states(q, q->first_to_check, &state, count, 0);
+ 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_PENDING:
+ BUG();
case SLSB_P_OUTPUT_EMPTY:
/* the adapter got it */
- DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out empty:%1d %02x", q->nr, count);
+ 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);
if (q->irq_ptr->perf_stat_enabled)
account_sbals(q, count);
+
break;
case SLSB_P_OUTPUT_ERROR:
process_buffer_error(q, count);
@@ -701,7 +825,8 @@ static int get_outbound_buffer_frontier(struct qdio_q *q)
/* the adapter has not fetched the output yet */
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);
+ 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:
@@ -709,6 +834,8 @@ static int get_outbound_buffer_frontier(struct qdio_q *q)
default:
BUG();
}
+
+out:
return q->first_to_check;
}
@@ -732,7 +859,7 @@ static inline int qdio_outbound_q_moved(struct qdio_q *q)
return 0;
}
-static int qdio_kick_outbound_q(struct qdio_q *q)
+static int qdio_kick_outbound_q(struct qdio_q *q, unsigned long aob)
{
int retries = 0, cc;
unsigned int busy_bit;
@@ -744,7 +871,7 @@ static int qdio_kick_outbound_q(struct qdio_q *q)
retry:
qperf_inc(q, siga_write);
- cc = qdio_siga_output(q, &busy_bit);
+ cc = qdio_siga_output(q, &busy_bit, aob);
switch (cc) {
case 0:
break;
@@ -921,8 +1048,9 @@ static void qdio_int_handler_pci(struct qdio_irq *irq_ptr)
}
q->u.in.queue_start_poll(q->irq_ptr->cdev, q->nr,
q->irq_ptr->int_parm);
- } else
+ } else {
tasklet_schedule(&q->tasklet);
+ }
}
if (!pci_out_supported(q))
@@ -1236,6 +1364,26 @@ 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
@@ -1301,6 +1449,8 @@ int qdio_establish(struct qdio_initialize *init_data)
qdio_setup_ssqd_info(irq_ptr);
DBF_EVENT("qib ac:%4x", irq_ptr->qib.ac);
+ qdio_detect_hsicq(irq_ptr);
+
/* qebsm is now setup if available, initialize buffer states */
qdio_init_buf_states(irq_ptr);
@@ -1442,12 +1592,9 @@ set:
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 0;
-
if (need_siga_in(q))
return qdio_siga_input(q);
+
return 0;
}
@@ -1480,17 +1627,21 @@ static int handle_outbound(struct qdio_q *q, unsigned int callflags,
q->u.out.pci_out_enabled = 0;
if (queue_type(q) == QDIO_IQDIO_QFMT) {
- /* One SIGA-W per buffer required for unicast HiperSockets. */
+ unsigned long phys_aob = 0;
+
+ /* One SIGA-W per buffer required for unicast HSI */
WARN_ON_ONCE(count > 1 && !multicast_outbound(q));
- rc = qdio_kick_outbound_q(q);
+ phys_aob = qdio_aob_for_buffer(&q->u.out, bufnr);
+
+ 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);
+ rc = qdio_kick_outbound_q(q, 0);
else
qperf_inc(q, fast_requeue);
}
@@ -1518,6 +1669,7 @@ int do_QDIO(struct ccw_device *cdev, unsigned int callflags,
{
struct qdio_irq *irq_ptr;
+
if (bufnr >= QDIO_MAX_BUFFERS_PER_Q || count > QDIO_MAX_BUFFERS_PER_Q)
return -EINVAL;
@@ -1562,7 +1714,7 @@ int qdio_start_irq(struct ccw_device *cdev, int nr)
WARN_ON(queue_irqs_enabled(q));
- if (!shared_ind(q->irq_ptr->dsci))
+ if (!shared_ind(q))
xchg(q->irq_ptr->dsci, 0);
qdio_stop_polling(q);
@@ -1572,7 +1724,7 @@ int qdio_start_irq(struct ccw_device *cdev, int nr)
* We need to check again to not lose initiative after
* resetting the ACK state.
*/
- if (!shared_ind(q->irq_ptr->dsci) && *q->irq_ptr->dsci)
+ if (!shared_ind(q) && *q->irq_ptr->dsci)
goto rescan;
if (!qdio_inbound_q_done(q))
goto rescan;