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ioat(4): Add additional tracing

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These probes help track down driver bugs.

Sponsored by:	Dell EMC Isilon
This commit is contained in:
cem 2016-10-28 23:53:33 +00:00
parent 0f04e70457
commit 051b358b3f
1 changed files with 22 additions and 6 deletions
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28
sys/dev/ioat/ioat.c
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@ -693,8 +693,8 @@ ioat_process_events(struct ioat_softc *ioat)
while (desc->hw_desc_bus_addr != status && ioat_get_active(ioat) > 0) {
desc = ioat_get_ring_entry(ioat, ioat->tail);
dmadesc = &desc->bus_dmadesc;
CTR4(KTR_IOAT, "channel=%u completing desc %u ok cb %p(%p)",
ioat->chan_idx, ioat->tail, dmadesc->callback_fn,
CTR5(KTR_IOAT, "channel=%u completing desc idx %u (%p) ok cb %p(%p)",
ioat->chan_idx, ioat->tail, dmadesc, dmadesc->callback_fn,
dmadesc->callback_arg);
if (dmadesc->callback_fn != NULL)
@ -703,6 +703,8 @@ ioat_process_events(struct ioat_softc *ioat)
completed++;
ioat->tail++;
}
CTR5(KTR_IOAT, "%s channel=%u head=%u tail=%u active=%u", __func__,
ioat->chan_idx, ioat->head, ioat->tail, ioat_get_active(ioat));
if (completed != 0) {
ioat->last_seen = desc->hw_desc_bus_addr;
@ -760,8 +762,8 @@ ioat_process_events(struct ioat_softc *ioat)
while (ioat_get_active(ioat) > 0) {
desc = ioat_get_ring_entry(ioat, ioat->tail);
dmadesc = &desc->bus_dmadesc;
CTR4(KTR_IOAT, "channel=%u completing desc %u err cb %p(%p)",
ioat->chan_idx, ioat->tail, dmadesc->callback_fn,
CTR5(KTR_IOAT, "channel=%u completing desc idx %u (%p) err cb %p(%p)",
ioat->chan_idx, ioat->tail, dmadesc, dmadesc->callback_fn,
dmadesc->callback_arg);
if (dmadesc->callback_fn != NULL)
@ -773,6 +775,8 @@ ioat_process_events(struct ioat_softc *ioat)
ioat->stats.descriptors_processed++;
ioat->stats.descriptors_error++;
}
CTR5(KTR_IOAT, "%s channel=%u head=%u tail=%u active=%u", __func__,
ioat->chan_idx, ioat->head, ioat->tail, ioat_get_active(ioat));
if (ioat->is_completion_pending) {
ioat->is_completion_pending = FALSE;
@ -947,7 +951,8 @@ ioat_release(bus_dmaengine_t dmaengine)
struct ioat_softc *ioat;
ioat = to_ioat_softc(dmaengine);
CTR2(KTR_IOAT, "%s channel=%u", __func__, ioat->chan_idx);
CTR3(KTR_IOAT, "%s channel=%u dispatch hw_head=%u", __func__,
ioat->chan_idx, ioat->hw_head & UINT16_MAX);
ioat_write_2(ioat, IOAT_DMACOUNT_OFFSET, (uint16_t)ioat->hw_head);
if (!ioat->is_completion_pending) {
@ -1040,7 +1045,6 @@ ioat_copy(bus_dmaengine_t dmaengine, bus_addr_t dst,
struct ioat_softc *ioat;
ioat = to_ioat_softc(dmaengine);
CTR2(KTR_IOAT, "%s channel=%u", __func__, ioat->chan_idx);
if (((src | dst) & (0xffffull << 48)) != 0) {
ioat_log_message(0, "%s: High 16 bits of src/dst invalid\n",
@ -1058,6 +1062,8 @@ ioat_copy(bus_dmaengine_t dmaengine, bus_addr_t dst,
dump_descriptor(hw_desc);
ioat_submit_single(ioat);
CTR6(KTR_IOAT, "%s channel=%u desc=%p dest=%lx src=%lx len=%lx",
__func__, ioat->chan_idx, &desc->bus_dmadesc, dst, src, len);
return (&desc->bus_dmadesc);
}
@ -1414,11 +1420,16 @@ ioat_reserve_space(struct ioat_softc *ioat, uint32_t num_descs, int mflags)
if (ioat_get_ring_space(ioat) >= num_descs)
goto out;
CTR3(KTR_IOAT, "%s channel=%u starved (%u)", __func__,
ioat->chan_idx, num_descs);
if (!dug && !ioat->is_submitter_processing &&
(1 << ioat->ring_size_order) > num_descs) {
ioat->is_submitter_processing = TRUE;
mtx_unlock(&ioat->submit_lock);
CTR2(KTR_IOAT, "%s channel=%u attempting to process events",
__func__, ioat->chan_idx);
ioat_process_events(ioat);
mtx_lock(&ioat->submit_lock);
@ -1433,6 +1444,8 @@ ioat_reserve_space(struct ioat_softc *ioat, uint32_t num_descs, int mflags)
order = ioat->ring_size_order;
if (ioat->is_resize_pending || order == IOAT_MAX_ORDER) {
if ((mflags & M_WAITOK) != 0) {
CTR2(KTR_IOAT, "%s channel=%u blocking on completions",
__func__, ioat->chan_idx);
msleep(&ioat->tail, &ioat->submit_lock, 0,
"ioat_rsz", 0);
continue;
@ -1794,6 +1807,9 @@ ioat_submit_single(struct ioat_softc *ioat)
ioat_get(ioat, IOAT_ACTIVE_DESCR_REF);
atomic_add_rel_int(&ioat->head, 1);
atomic_add_rel_int(&ioat->hw_head, 1);
CTR5(KTR_IOAT, "%s channel=%u head=%u hw_head=%u tail=%u", __func__,
ioat->chan_idx, ioat->head, ioat->hw_head & UINT16_MAX,
ioat->tail);
ioat->stats.descriptors_submitted++;
}