drm/i915: Dump the ringbuffer of the active request for debugging
Sometimes we need to see what instructions we emitted for a request to try and gather a glimmer of insight into what the GPU is doing when it stops responding. v2: Move ring dumping into its own routine Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20180614122150.17552-1-chris@chris-wilson.co.uk Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
This commit is contained in:
parent
856e1b1756
commit
83c317832e
drivers/gpu/drm/i915
|
@ -1394,6 +1394,39 @@ static void intel_engine_print_registers(const struct intel_engine_cs *engine,
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static void print_request_ring(struct drm_printer *m, 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 intel_engine_dump(struct intel_engine_cs *engine,
|
void intel_engine_dump(struct intel_engine_cs *engine,
|
||||||
struct drm_printer *m,
|
struct drm_printer *m,
|
||||||
const char *header, ...)
|
const char *header, ...)
|
||||||
|
@ -1444,11 +1477,7 @@ void intel_engine_dump(struct intel_engine_cs *engine,
|
||||||
rq = i915_gem_find_active_request(engine);
|
rq = i915_gem_find_active_request(engine);
|
||||||
if (rq) {
|
if (rq) {
|
||||||
print_request(m, rq, "\t\tactive ");
|
print_request(m, rq, "\t\tactive ");
|
||||||
drm_printf(m,
|
|
||||||
"\t\t[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);
|
|
||||||
drm_printf(m, "\t\tring->start: 0x%08x\n",
|
drm_printf(m, "\t\tring->start: 0x%08x\n",
|
||||||
i915_ggtt_offset(rq->ring->vma));
|
i915_ggtt_offset(rq->ring->vma));
|
||||||
drm_printf(m, "\t\tring->head: 0x%08x\n",
|
drm_printf(m, "\t\tring->head: 0x%08x\n",
|
||||||
|
@ -1459,6 +1488,8 @@ void intel_engine_dump(struct intel_engine_cs *engine,
|
||||||
rq->ring->emit);
|
rq->ring->emit);
|
||||||
drm_printf(m, "\t\tring->space: 0x%08x\n",
|
drm_printf(m, "\t\tring->space: 0x%08x\n",
|
||||||
rq->ring->space);
|
rq->ring->space);
|
||||||
|
|
||||||
|
print_request_ring(m, rq);
|
||||||
}
|
}
|
||||||
|
|
||||||
rcu_read_unlock();
|
rcu_read_unlock();
|
||||||
|
|
Loading…
Reference in New Issue