intel: Add support for GPU reset status query ioctl

I would have just used the drmIoctl interface directly in Mesa, but the
ioctl needs some data from the drm_intel_context that is not exposed
outside libdrm.

This ioctl is in the drm-intel-next tree as b635991.

v2: Update based on Mika's kernel work.

v3: Fix compile failures from last-minute typos.  Sigh.

v4: Import the actual changes from the kernel i915_drm.h.  Only comments
on some fields of drm_i915_reset_stats differed.  There are still some
deltas between the kernel i915_drm.h and the one in libdrm, but those
can be resolved in other patches.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> [v3]
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 34 insertions, 0 deletions

diff --git a/intel/intel_bufmgr_gem.c b/intel/intel_bufmgr_gem.c
index 029ca5d8..df6fcec4 100644
--- a/intel/intel_bufmgr_gem.c
+++ b/intel/intel_bufmgr_gem.c
@@ -3021,6 +3021,40 @@ drm_intel_gem_context_destroy(drm_intel_context *ctx)
 }
 
 int
+drm_intel_get_reset_stats(drm_intel_context *ctx,
+			  uint32_t *reset_count,
+			  uint32_t *active,
+			  uint32_t *pending)
+{
+	drm_intel_bufmgr_gem *bufmgr_gem;
+	struct drm_i915_reset_stats stats;
+	int ret;
+
+	if (ctx == NULL)
+		return -EINVAL;
+
+	VG_CLEAR(stats);
+
+	bufmgr_gem = (drm_intel_bufmgr_gem *)ctx->bufmgr;
+	stats.ctx_id = ctx->ctx_id;
+	ret = drmIoctl(bufmgr_gem->fd,
+		       DRM_IOCTL_I915_GET_RESET_STATS,
+		       &stats);
+	if (ret == 0) {
+		if (reset_count != NULL)
+			*reset_count = stats.reset_count;
+
+		if (active != NULL)
+			*active = stats.batch_active;
+
+		if (pending != NULL)
+			*pending = stats.batch_pending;
+	}
+
+	return ret;
+}
+
+int
 drm_intel_reg_read(drm_intel_bufmgr *bufmgr,
 		   uint32_t offset,
 		   uint64_t *result)