[Intel-gfx] [PATCH 27/57] drm/i915: Show execlists queues when dumping state
Chris Wilson
chris at chris-wilson.co.uk
Mon Feb 1 08:56:45 UTC 2021
Move the scheduler pretty printer from out of the execlists register
state to and push it to the schduler.
v2: It's not common to all, so shove it out of intel_engine_cs and
split it between scheduler front/back ends
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/gt/intel_engine_cs.c | 233 +-----------------
.../drm/i915/gt/intel_execlists_submission.c | 174 ++++++++-----
drivers/gpu/drm/i915/i915_request.c | 6 +
drivers/gpu/drm/i915/i915_scheduler.c | 180 ++++++++++++++
drivers/gpu/drm/i915/i915_scheduler.h | 8 +
drivers/gpu/drm/i915/i915_scheduler_types.h | 9 +
6 files changed, 331 insertions(+), 279 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index 5751a529b2df..9ff597ef5aca 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -1277,49 +1277,6 @@ bool intel_engine_can_store_dword(struct intel_engine_cs *engine)
}
}
-static struct intel_timeline *get_timeline(const struct i915_request *rq)
-{
- struct intel_timeline *tl;
-
- /*
- * Even though we are holding the engine->active.lock here, there
- * is no control over the submission queue per-se and we are
- * inspecting the active state at a random point in time, with an
- * unknown queue. Play safe and make sure the timeline remains valid.
- * (Only being used for pretty printing, one extra kref shouldn't
- * cause a camel stampede!)
- */
- rcu_read_lock();
- tl = rcu_dereference(rq->timeline);
- if (!kref_get_unless_zero(&tl->kref))
- tl = NULL;
- rcu_read_unlock();
-
- return tl;
-}
-
-static int print_ring(char *buf, int sz, struct i915_request *rq)
-{
- int len = 0;
-
- if (!i915_request_signaled(rq)) {
- struct intel_timeline *tl = get_timeline(rq);
-
- len = scnprintf(buf, sz,
- "ring:{start:%08x, hwsp:%08x, seqno:%08x, runtime:%llums}, ",
- i915_ggtt_offset(rq->ring->vma),
- tl ? tl->hwsp_offset : 0,
- hwsp_seqno(rq),
- DIV_ROUND_CLOSEST_ULL(intel_context_get_total_runtime_ns(rq->context),
- 1000 * 1000));
-
- if (tl)
- intel_timeline_put(tl);
- }
-
- return len;
-}
-
static void hexdump(struct drm_printer *m, const void *buf, size_t len)
{
const size_t rowsize = 8 * sizeof(u32);
@@ -1349,27 +1306,15 @@ static void hexdump(struct drm_printer *m, const void *buf, size_t len)
}
}
-static const char *repr_timer(const struct timer_list *t)
-{
- if (!READ_ONCE(t->expires))
- return "inactive";
-
- if (timer_pending(t))
- return "active";
-
- return "expired";
-}
-
static void intel_engine_print_registers(struct intel_engine_cs *engine,
struct drm_printer *m)
{
- struct drm_i915_private *dev_priv = engine->i915;
- struct intel_engine_execlists * const execlists = &engine->execlists;
+ struct drm_i915_private *i915 = engine->i915;
u64 addr;
- if (engine->id == RENDER_CLASS && IS_GEN_RANGE(dev_priv, 4, 7))
+ if (engine->id == RENDER_CLASS && IS_GEN_RANGE(i915, 4, 7))
drm_printf(m, "\tCCID: 0x%08x\n", ENGINE_READ(engine, CCID));
- if (HAS_EXECLISTS(dev_priv)) {
+ if (HAS_EXECLISTS(i915)) {
drm_printf(m, "\tEL_STAT_HI: 0x%08x\n",
ENGINE_READ(engine, RING_EXECLIST_STATUS_HI));
drm_printf(m, "\tEL_STAT_LO: 0x%08x\n",
@@ -1390,7 +1335,7 @@ static void intel_engine_print_registers(struct intel_engine_cs *engine,
ENGINE_READ(engine, RING_MI_MODE) & (MODE_IDLE) ? " [idle]" : "");
}
- if (INTEL_GEN(dev_priv) >= 6) {
+ if (INTEL_GEN(i915) >= 6) {
drm_printf(m, "\tRING_IMR: 0x%08x\n",
ENGINE_READ(engine, RING_IMR));
drm_printf(m, "\tRING_ESR: 0x%08x\n",
@@ -1407,15 +1352,15 @@ static void intel_engine_print_registers(struct intel_engine_cs *engine,
addr = intel_engine_get_last_batch_head(engine);
drm_printf(m, "\tBBADDR: 0x%08x_%08x\n",
upper_32_bits(addr), lower_32_bits(addr));
- if (INTEL_GEN(dev_priv) >= 8)
+ if (INTEL_GEN(i915) >= 8)
addr = ENGINE_READ64(engine, RING_DMA_FADD, RING_DMA_FADD_UDW);
- else if (INTEL_GEN(dev_priv) >= 4)
+ else if (INTEL_GEN(i915) >= 4)
addr = ENGINE_READ(engine, RING_DMA_FADD);
else
addr = ENGINE_READ(engine, DMA_FADD_I8XX);
drm_printf(m, "\tDMA_FADDR: 0x%08x_%08x\n",
upper_32_bits(addr), lower_32_bits(addr));
- if (INTEL_GEN(dev_priv) >= 4) {
+ if (INTEL_GEN(i915) >= 4) {
drm_printf(m, "\tIPEIR: 0x%08x\n",
ENGINE_READ(engine, RING_IPEIR));
drm_printf(m, "\tIPEHR: 0x%08x\n",
@@ -1424,130 +1369,6 @@ static void intel_engine_print_registers(struct intel_engine_cs *engine,
drm_printf(m, "\tIPEIR: 0x%08x\n", ENGINE_READ(engine, IPEIR));
drm_printf(m, "\tIPEHR: 0x%08x\n", ENGINE_READ(engine, IPEHR));
}
-
- if (intel_engine_uses_guc(engine)) {
- /* nothing to print yet */
- } else if (HAS_EXECLISTS(dev_priv)) {
- struct i915_sched *se = intel_engine_get_scheduler(engine);
- struct i915_request * const *port, *rq;
- const u32 *hws =
- &engine->status_page.addr[I915_HWS_CSB_BUF0_INDEX];
- const u8 num_entries = execlists->csb_size;
- unsigned int idx;
- u8 read, write;
-
- drm_printf(m, "\tExeclist tasklet queued? %s (%s), preempt? %s, timeslice? %s\n",
- yesno(test_bit(TASKLET_STATE_SCHED,
- &se->tasklet.state)),
- enableddisabled(!atomic_read(&se->tasklet.count)),
- repr_timer(&engine->execlists.preempt),
- repr_timer(&engine->execlists.timer));
-
- read = execlists->csb_head;
- write = READ_ONCE(*execlists->csb_write);
-
- drm_printf(m, "\tExeclist status: 0x%08x %08x; CSB read:%d, write:%d, entries:%d\n",
- ENGINE_READ(engine, RING_EXECLIST_STATUS_LO),
- ENGINE_READ(engine, RING_EXECLIST_STATUS_HI),
- read, write, num_entries);
-
- if (read >= num_entries)
- read = 0;
- if (write >= num_entries)
- write = 0;
- if (read > write)
- write += num_entries;
- while (read < write) {
- idx = ++read % num_entries;
- drm_printf(m, "\tExeclist CSB[%d]: 0x%08x, context: %d\n",
- idx, hws[idx * 2], hws[idx * 2 + 1]);
- }
-
- i915_sched_lock_bh(se);
- rcu_read_lock();
- for (port = execlists->active; (rq = *port); port++) {
- char hdr[160];
- int len;
-
- len = scnprintf(hdr, sizeof(hdr),
- "\t\tActive[%d]: ccid:%08x%s%s, ",
- (int)(port - execlists->active),
- rq->context->lrc.ccid,
- intel_context_is_closed(rq->context) ? "!" : "",
- intel_context_is_banned(rq->context) ? "*" : "");
- len += print_ring(hdr + len, sizeof(hdr) - len, rq);
- scnprintf(hdr + len, sizeof(hdr) - len, "rq: ");
- i915_request_show(m, rq, hdr, 0);
- }
- for (port = execlists->pending; (rq = *port); port++) {
- char hdr[160];
- int len;
-
- len = scnprintf(hdr, sizeof(hdr),
- "\t\tPending[%d]: ccid:%08x%s%s, ",
- (int)(port - execlists->pending),
- rq->context->lrc.ccid,
- intel_context_is_closed(rq->context) ? "!" : "",
- intel_context_is_banned(rq->context) ? "*" : "");
- len += print_ring(hdr + len, sizeof(hdr) - len, rq);
- scnprintf(hdr + len, sizeof(hdr) - len, "rq: ");
- i915_request_show(m, rq, hdr, 0);
- }
- rcu_read_unlock();
- i915_sched_unlock_bh(se);
- } else if (INTEL_GEN(dev_priv) > 6) {
- drm_printf(m, "\tPP_DIR_BASE: 0x%08x\n",
- ENGINE_READ(engine, RING_PP_DIR_BASE));
- drm_printf(m, "\tPP_DIR_BASE_READ: 0x%08x\n",
- ENGINE_READ(engine, RING_PP_DIR_BASE_READ));
- drm_printf(m, "\tPP_DIR_DCLV: 0x%08x\n",
- ENGINE_READ(engine, RING_PP_DIR_DCLV));
- }
-}
-
-static void
-print_request_ring(struct drm_printer *m, const struct i915_request *rq)
-{
- void *ring;
- int size;
-
- drm_printf(m,
- "[head %04x, postfix %04x, tail %04x, batch 0x%08x_%08x]:\n",
- rq->head, rq->postfix, rq->tail,
- rq->batch ? upper_32_bits(rq->batch->node.start) : ~0u,
- rq->batch ? lower_32_bits(rq->batch->node.start) : ~0u);
-
- size = rq->tail - rq->head;
- if (rq->tail < rq->head)
- size += rq->ring->size;
-
- ring = kmalloc(size, GFP_ATOMIC);
- if (ring) {
- const void *vaddr = rq->ring->vaddr;
- unsigned int head = rq->head;
- unsigned int len = 0;
-
- if (rq->tail < head) {
- len = rq->ring->size - head;
- memcpy(ring, vaddr + head, len);
- head = 0;
- }
- memcpy(ring + len, vaddr + head, size - len);
-
- hexdump(m, ring, size);
- kfree(ring);
- }
-}
-
-static unsigned long list_count(struct list_head *list)
-{
- struct list_head *pos;
- unsigned long count = 0;
-
- list_for_each(pos, list)
- count++;
-
- return count;
}
static unsigned long read_ul(void *p, size_t x)
@@ -1590,10 +1411,8 @@ void intel_engine_dump(struct intel_engine_cs *engine,
const char *header, ...)
{
struct i915_gpu_error * const error = &engine->i915->gpu_error;
- struct i915_sched *se = intel_engine_get_scheduler(engine);
const struct i915_request *rq;
intel_wakeref_t wakeref;
- unsigned long flags;
ktime_t dummy;
if (header) {
@@ -1632,41 +1451,9 @@ void intel_engine_dump(struct intel_engine_cs *engine,
drm_printf(m, "\tRequests:\n");
- rcu_read_lock();
- spin_lock_irqsave(&se->lock, flags);
- rq = se->active_request(se);
- if (rq) {
- struct intel_timeline *tl = get_timeline(rq);
+ i915_sched_show(m, intel_engine_get_scheduler(engine),
+ i915_request_show, 8);
- i915_request_show(m, rq, "\t\tactive ", 0);
-
- drm_printf(m, "\t\tring->start: 0x%08x\n",
- i915_ggtt_offset(rq->ring->vma));
- drm_printf(m, "\t\tring->head: 0x%08x\n",
- rq->ring->head);
- drm_printf(m, "\t\tring->tail: 0x%08x\n",
- rq->ring->tail);
- drm_printf(m, "\t\tring->emit: 0x%08x\n",
- rq->ring->emit);
- drm_printf(m, "\t\tring->space: 0x%08x\n",
- rq->ring->space);
-
- if (tl) {
- drm_printf(m, "\t\tring->hwsp: 0x%08x\n",
- tl->hwsp_offset);
- intel_timeline_put(tl);
- }
-
- print_request_ring(m, rq);
-
- if (rq->context->lrc_reg_state) {
- drm_printf(m, "Logical Ring Context:\n");
- hexdump(m, rq->context->lrc_reg_state, PAGE_SIZE);
- }
- }
- drm_printf(m, "\tOn hold?: %lu\n", list_count(&se->hold));
- spin_unlock_irqrestore(&se->lock, flags);
- rcu_read_unlock();
drm_printf(m, "\tMMIO base: 0x%08x\n", engine->mmio_base);
wakeref = intel_runtime_pm_get_if_in_use(engine->uncore->rpm);
@@ -1677,8 +1464,6 @@ void intel_engine_dump(struct intel_engine_cs *engine,
drm_printf(m, "\tDevice is asleep; skipping register dump\n");
}
- intel_execlists_show_requests(engine, m, i915_request_show, 8);
-
drm_printf(m, "HWSP:\n");
hexdump(m, engine->status_page.addr, PAGE_SIZE);
diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
index 8b848adb65b7..b1007e560527 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -198,6 +198,14 @@ struct virtual_engine {
struct intel_engine_cs *siblings[];
};
+static void execlists_show(struct drm_printer *m,
+ struct i915_sched *se,
+ void (*show_request)(struct drm_printer *m,
+ const struct i915_request *rq,
+ const char *prefix,
+ int indent),
+ unsigned int max);
+
static struct virtual_engine *to_virtual_engine(struct intel_engine_cs *engine)
{
GEM_BUG_ON(!intel_engine_is_virtual(engine));
@@ -2971,6 +2979,7 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine)
engine->sched.active_request = execlists_active_request;
engine->sched.is_executing = execlists_is_executing;
+ engine->sched.show = execlists_show;
tasklet_setup(&engine->sched.tasklet, execlists_submission_tasklet);
timer_setup(&engine->execlists.timer, execlists_timeslice, 0);
timer_setup(&engine->execlists.preempt, execlists_preempt, 0);
@@ -3581,68 +3590,65 @@ int intel_virtual_engine_attach_bond(struct intel_engine_cs *engine,
return 0;
}
-void intel_execlists_show_requests(struct intel_engine_cs *engine,
- struct drm_printer *m,
- void (*show_request)(struct drm_printer *m,
- const struct i915_request *rq,
- const char *prefix,
- int indent),
- unsigned int max)
+static const char *repr_timer(const struct timer_list *t)
{
- const struct intel_engine_execlists *execlists = &engine->execlists;
- struct i915_sched *se = intel_engine_get_scheduler(engine);
+ if (!READ_ONCE(t->expires))
+ return "inactive";
+
+ if (timer_pending(t))
+ return "active";
+
+ return "expired";
+}
+
+static int print_ring(char *buf, int sz, struct i915_request *rq)
+{
+ int len = 0;
+
+ rcu_read_lock();
+ if (!i915_request_signaled(rq)) {
+ struct intel_timeline *tl = rcu_dereference(rq->timeline);
+
+ len = scnprintf(buf, sz,
+ "ring:{start:%08x, hwsp:%08x, seqno:%08x, runtime:%llums}, ",
+ i915_ggtt_offset(rq->ring->vma),
+ tl ? tl->hwsp_offset : 0,
+ hwsp_seqno(rq),
+ DIV_ROUND_CLOSEST_ULL(intel_context_get_total_runtime_ns(rq->context),
+ 1000 * 1000));
+ }
+ rcu_read_unlock();
+
+ return len;
+}
+
+static void execlists_show(struct drm_printer *m,
+ struct i915_sched *se,
+ void (*show_request)(struct drm_printer *m,
+ const struct i915_request *rq,
+ const char *prefix,
+ int indent),
+ unsigned int max)
+{
+ const struct intel_engine_cs *engine =
+ container_of(se, typeof(*engine), sched);
+ const struct intel_engine_execlists *el = &engine->execlists;
+ const u64 *hws = el->csb_status;
+ const u8 num_entries = el->csb_size;
+ struct i915_request * const *port;
struct i915_request *rq, *last;
- unsigned long flags;
+ intel_wakeref_t wakeref;
unsigned int count;
struct rb_node *rb;
+ unsigned int idx;
+ u8 read, write;
- spin_lock_irqsave(&se->lock, flags);
+ wakeref = intel_runtime_pm_get(engine->uncore->rpm);
+ rcu_read_lock();
last = NULL;
count = 0;
- list_for_each_entry(rq, &se->requests, sched.link) {
- if (count++ < max - 1)
- show_request(m, rq, "\t\t", 0);
- else
- last = rq;
- }
- if (last) {
- if (count > max) {
- drm_printf(m,
- "\t\t...skipping %d executing requests...\n",
- count - max);
- }
- show_request(m, last, "\t\t", 0);
- }
-
- if (execlists->queue_priority_hint != INT_MIN)
- drm_printf(m, "\t\tQueue priority hint: %d\n",
- READ_ONCE(execlists->queue_priority_hint));
-
- last = NULL;
- count = 0;
- for (rb = rb_first_cached(&se->queue); rb; rb = rb_next(rb)) {
- struct i915_priolist *p = rb_entry(rb, typeof(*p), node);
-
- priolist_for_each_request(rq, p) {
- if (count++ < max - 1)
- show_request(m, rq, "\t\t", 0);
- else
- last = rq;
- }
- }
- if (last) {
- if (count > max) {
- drm_printf(m,
- "\t\t...skipping %d queued requests...\n",
- count - max);
- }
- show_request(m, last, "\t\t", 0);
- }
-
- last = NULL;
- count = 0;
- for (rb = rb_first_cached(&execlists->virtual); rb; rb = rb_next(rb)) {
+ for (rb = rb_first_cached(&el->virtual); rb; rb = rb_next(rb)) {
struct virtual_engine *ve =
rb_entry(rb, typeof(*ve), nodes[engine->id].rb);
struct i915_request *rq = READ_ONCE(ve->request);
@@ -3663,7 +3669,65 @@ void intel_execlists_show_requests(struct intel_engine_cs *engine,
show_request(m, last, "\t\t", 0);
}
- spin_unlock_irqrestore(&se->lock, flags);
+ drm_printf(m, "\tExeclists preempt? %s, timeslice? %s\n",
+ repr_timer(&el->preempt),
+ repr_timer(&el->timer));
+
+ read = el->csb_head;
+ write = READ_ONCE(*el->csb_write);
+
+ drm_printf(m, "\tExeclist status: 0x%08x %08x; CSB read:%d, write:%d, entries:%d\n",
+ ENGINE_READ(engine, RING_EXECLIST_STATUS_LO),
+ ENGINE_READ(engine, RING_EXECLIST_STATUS_HI),
+ read, write, num_entries);
+
+ if (read >= num_entries)
+ read = 0;
+ if (write >= num_entries)
+ write = 0;
+ if (read > write)
+ write += num_entries;
+ while (read < write) {
+ idx = ++read % num_entries;
+ drm_printf(m, "\tExeclist CSB[%d]: 0x%08x, context: %d\n",
+ idx,
+ lower_32_bits(hws[idx]),
+ upper_32_bits(hws[idx]));
+ }
+
+ i915_sched_lock_bh(se);
+ for (port = el->active; (rq = *port); port++) {
+ char hdr[160];
+ int len;
+
+ len = scnprintf(hdr, sizeof(hdr),
+ "\t\tActive[%d]: ccid:%08x%s%s, ",
+ (int)(port - el->active),
+ rq->context->lrc.ccid,
+ intel_context_is_closed(rq->context) ? "!" : "",
+ intel_context_is_banned(rq->context) ? "*" : "");
+ len += print_ring(hdr + len, sizeof(hdr) - len, rq);
+ scnprintf(hdr + len, sizeof(hdr) - len, "rq: ");
+ i915_request_show(m, rq, hdr, 0);
+ }
+ for (port = el->pending; (rq = *port); port++) {
+ char hdr[160];
+ int len;
+
+ len = scnprintf(hdr, sizeof(hdr),
+ "\t\tPending[%d]: ccid:%08x%s%s, ",
+ (int)(port - el->pending),
+ rq->context->lrc.ccid,
+ intel_context_is_closed(rq->context) ? "!" : "",
+ intel_context_is_banned(rq->context) ? "*" : "");
+ len += print_ring(hdr + len, sizeof(hdr) - len, rq);
+ scnprintf(hdr + len, sizeof(hdr) - len, "rq: ");
+ i915_request_show(m, rq, hdr, 0);
+ }
+ i915_sched_unlock_bh(se);
+
+ rcu_read_unlock();
+ intel_runtime_pm_put(engine->uncore->rpm, wakeref);
}
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index 792dd0bbea3b..459f727b03cd 100644
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -1827,6 +1827,9 @@ static char queue_status(const struct i915_request *rq)
if (i915_request_is_active(rq))
return 'E';
+ if (i915_request_on_hold(rq))
+ return 'S';
+
if (i915_request_is_ready(rq))
return intel_engine_is_virtual(rq->engine) ? 'V' : 'R';
@@ -1895,6 +1898,9 @@ void i915_request_show(struct drm_printer *m,
* - a completed request may still be regarded as executing, its
* status may not be updated until it is retired and removed
* from the lists
+ *
+ * S [Suspended]
+ * - the request has been temporarily suspended from execution
*/
x = print_sched_attr(&rq->sched.attr, buf, x, sizeof(buf));
diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c
index cb27bcb7a1f6..af3a12d6f6d2 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.c
+++ b/drivers/gpu/drm/i915/i915_scheduler.c
@@ -1124,6 +1124,186 @@ void i915_request_show_with_schedule(struct drm_printer *m,
rcu_read_unlock();
}
+static unsigned long list_count(struct list_head *list)
+{
+ struct list_head *pos;
+ unsigned long count = 0;
+
+ list_for_each(pos, list)
+ count++;
+
+ return count;
+}
+
+static void hexdump(struct drm_printer *m, const void *buf, size_t len)
+{
+ const size_t rowsize = 8 * sizeof(u32);
+ const void *prev = NULL;
+ bool skip = false;
+ size_t pos;
+
+ for (pos = 0; pos < len; pos += rowsize) {
+ char line[128];
+
+ if (prev && !memcmp(prev, buf + pos, rowsize)) {
+ if (!skip) {
+ drm_printf(m, "*\n");
+ skip = true;
+ }
+ continue;
+ }
+
+ WARN_ON_ONCE(hex_dump_to_buffer(buf + pos, len - pos,
+ rowsize, sizeof(u32),
+ line, sizeof(line),
+ false) >= sizeof(line));
+ drm_printf(m, "[%04zx] %s\n", pos, line);
+
+ prev = buf + pos;
+ skip = false;
+ }
+}
+
+static void
+print_request_ring(struct drm_printer *m, const struct i915_request *rq)
+{
+ void *ring;
+ int size;
+
+ drm_printf(m,
+ "[head %04x, postfix %04x, tail %04x, batch 0x%08x_%08x]:\n",
+ rq->head, rq->postfix, rq->tail,
+ rq->batch ? upper_32_bits(rq->batch->node.start) : ~0u,
+ rq->batch ? lower_32_bits(rq->batch->node.start) : ~0u);
+
+ size = rq->tail - rq->head;
+ if (rq->tail < rq->head)
+ size += rq->ring->size;
+
+ ring = kmalloc(size, GFP_ATOMIC);
+ if (ring) {
+ const void *vaddr = rq->ring->vaddr;
+ unsigned int head = rq->head;
+ unsigned int len = 0;
+
+ if (rq->tail < head) {
+ len = rq->ring->size - head;
+ memcpy(ring, vaddr + head, len);
+ head = 0;
+ }
+ memcpy(ring + len, vaddr + head, size - len);
+
+ hexdump(m, ring, size);
+ kfree(ring);
+ }
+}
+
+void i915_sched_show(struct drm_printer *m,
+ struct i915_sched *se,
+ void (*show_request)(struct drm_printer *m,
+ const struct i915_request *rq,
+ const char *prefix,
+ int indent),
+ unsigned int max)
+{
+ const struct i915_request *rq, *last;
+ unsigned long flags;
+ unsigned int count;
+ struct rb_node *rb;
+
+ rcu_read_lock();
+ spin_lock_irqsave(&se->lock, flags);
+
+ rq = se->active_request(se);
+ if (rq) {
+ i915_request_show(m, rq, "\t\tactive ", 0);
+
+ drm_printf(m, "\t\tring->start: 0x%08x\n",
+ i915_ggtt_offset(rq->ring->vma));
+ drm_printf(m, "\t\tring->head: 0x%08x\n",
+ rq->ring->head);
+ drm_printf(m, "\t\tring->tail: 0x%08x\n",
+ rq->ring->tail);
+ drm_printf(m, "\t\tring->emit: 0x%08x\n",
+ rq->ring->emit);
+ drm_printf(m, "\t\tring->space: 0x%08x\n",
+ rq->ring->space);
+ drm_printf(m, "\t\tring->hwsp: 0x%08x\n",
+ i915_request_active_timeline(rq)->hwsp_offset);
+
+ print_request_ring(m, rq);
+
+ if (rq->context->lrc_reg_state) {
+ drm_printf(m, "Logical Ring Context:\n");
+ hexdump(m, rq->context->lrc_reg_state, PAGE_SIZE);
+ }
+ }
+ drm_printf(m, "\tOn hold?: %lu\n", list_count(&se->hold));
+
+ drm_printf(m, "\tTasklet queued? %s (%s)\n",
+ yesno(test_bit(TASKLET_STATE_SCHED, &se->tasklet.state)),
+ enableddisabled(!atomic_read(&se->tasklet.count)));
+
+ last = NULL;
+ count = 0;
+ list_for_each_entry(rq, &se->requests, sched.link) {
+ if (count++ < max - 1)
+ show_request(m, rq, "\t\t", 0);
+ else
+ last = rq;
+ }
+ if (last) {
+ if (count > max) {
+ drm_printf(m,
+ "\t\t...skipping %d executing requests...\n",
+ count - max);
+ }
+ show_request(m, last, "\t\t", 0);
+ }
+
+ last = NULL;
+ count = 0;
+ for (rb = rb_first_cached(&se->queue); rb; rb = rb_next(rb)) {
+ struct i915_priolist *p = rb_entry(rb, typeof(*p), node);
+
+ priolist_for_each_request(rq, p) {
+ if (count++ < max - 1)
+ show_request(m, rq, "\t\t", 0);
+ else
+ last = rq;
+ }
+ }
+ if (last) {
+ if (count > max) {
+ drm_printf(m,
+ "\t\t...skipping %d queued requests...\n",
+ count - max);
+ }
+ show_request(m, last, "\t\t", 0);
+ }
+
+ list_for_each_entry(rq, &se->hold, sched.link) {
+ if (count++ < max - 1)
+ show_request(m, rq, "\t\t", 0);
+ else
+ last = rq;
+ }
+ if (last) {
+ if (count > max) {
+ drm_printf(m,
+ "\t\t...skipping %d suspended requests...\n",
+ count - max);
+ }
+ show_request(m, last, "\t\t", 0);
+ }
+
+ spin_unlock_irqrestore(&se->lock, flags);
+ rcu_read_unlock();
+
+ if (se->show)
+ se->show(m, se, show_request, max);
+}
+
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
#include "selftests/i915_scheduler.c"
#endif
diff --git a/drivers/gpu/drm/i915/i915_scheduler.h b/drivers/gpu/drm/i915/i915_scheduler.h
index e2e8b90adb66..51bca23a5617 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.h
+++ b/drivers/gpu/drm/i915/i915_scheduler.h
@@ -129,4 +129,12 @@ void i915_request_show_with_schedule(struct drm_printer *m,
const char *prefix,
int indent);
+void i915_sched_show(struct drm_printer *m,
+ struct i915_sched *se,
+ void (*show_request)(struct drm_printer *m,
+ const struct i915_request *rq,
+ const char *prefix,
+ int indent),
+ unsigned int max);
+
#endif /* _I915_SCHEDULER_H_ */
diff --git a/drivers/gpu/drm/i915/i915_scheduler_types.h b/drivers/gpu/drm/i915/i915_scheduler_types.h
index 9a9b8e0d78ae..685280d61581 100644
--- a/drivers/gpu/drm/i915/i915_scheduler_types.h
+++ b/drivers/gpu/drm/i915/i915_scheduler_types.h
@@ -13,6 +13,7 @@
#include "i915_priolist_types.h"
+struct drm_printer;
struct i915_request;
/**
@@ -41,6 +42,14 @@ struct i915_sched {
bool (*is_executing)(const struct i915_request *rq);
+ void (*show)(struct drm_printer *m,
+ struct i915_sched *se,
+ void (*show_request)(struct drm_printer *m,
+ const struct i915_request *rq,
+ const char *prefix,
+ int indent),
+ unsigned int max);
+
struct list_head requests; /* active request, on HW */
struct list_head hold; /* ready requests, but on hold */
/**
--
2.20.1
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