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drm/i915: Build request info on stack before printk

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printk unhelpfully inserts a '\n' between consecutive calls, and since
our drm_printf wrapper may be emitting info a seq_file instead,
KERN_CONT is not an option. To work with any drm_printf destination, we
need to build up the output into a temporary buf on the stack and then
feed the complete line in a single call to printk.

Fixes: b7268c5eed ("drm/i915: Pack params to engine->schedule() into a struct")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180424010839.22860-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-04-24 02:08:39 +01:00
parent 1c3c1dc66a
commit 247870ac8e
1 changed files with 15 additions and 9 deletions
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24
drivers/gpu/drm/i915/intel_engine_cs.c
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@ -1113,14 +1113,17 @@ unsigned int intel_engines_has_context_isolation(struct drm_i915_private *i915)
return which;
}
static void print_sched_attr(struct drm_printer *m,
const struct drm_i915_private *i915,
const struct i915_sched_attr *attr)
static int print_sched_attr(struct drm_i915_private *i915,
const struct i915_sched_attr *attr,
char *buf, int x, int len)
{
if (attr->priority == I915_PRIORITY_INVALID)
return;
return x;
drm_printf(m, "prio=%d", attr->priority);
x += snprintf(buf + x, len - x,
" prio=%d", attr->priority);
return x;
}
static void print_request(struct drm_printer *m,
@ -1128,14 +1131,17 @@ static void print_request(struct drm_printer *m,
const char *prefix)
{
const char *name = rq->fence.ops->get_timeline_name(&rq->fence);
char buf[80];
int x = 0;
drm_printf(m, "%s%x%s [%llx:%x] ",
x = print_sched_attr(rq->i915, &rq->sched.attr, buf, x, sizeof(buf));
drm_printf(m, "%s%x%s [%llx:%x]%s @ %dms: %s\n",
prefix,
rq->global_seqno,
i915_request_completed(rq) ? "!" : "",
rq->fence.context, rq->fence.seqno);
print_sched_attr(m, rq->i915, &rq->sched.attr);
drm_printf(m, " @ %dms: %s\n",
rq->fence.context, rq->fence.seqno,
buf,
jiffies_to_msecs(jiffies - rq->emitted_jiffies),
name);
}