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drm/i915: Show bounds of active request in the ring on GPU hang

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Include the position of the active request in the ring, and display that
alongside the current RING registers (on a GPU hang).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161004201132.21801-6-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2016-10-04 21:11:30 +01:00
parent 77c607013e
commit cdb324bde5
2 changed files with 10 additions and 2 deletions
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3
drivers/gpu/drm/i915/i915_drv.h
View File

@ -788,6 +788,9 @@ struct drm_i915_error_state {
struct i915_address_space *vm;
int num_requests;
/* position of active request inside the ring */
u32 rq_head, rq_post, rq_tail;
/* our own tracking of ring head and tail */
u32 cpu_ring_head;
u32 cpu_ring_tail;

9
drivers/gpu/drm/i915/i915_gpu_error.c
View File

@ -262,8 +262,9 @@ static void error_print_engine(struct drm_i915_error_state_buf *m,
{
err_printf(m, "%s command stream:\n", engine_str(ee->engine_id));
err_printf(m, " START: 0x%08x\n", ee->start);
err_printf(m, " HEAD: 0x%08x\n", ee->head);
err_printf(m, " TAIL: 0x%08x\n", ee->tail);
err_printf(m, " HEAD: 0x%08x\n [0x%08x]", ee->head, ee->rq_head);
err_printf(m, " TAIL: 0x%08x [0x%08x, 0x%08x]\n",
ee->tail, ee->rq_post, ee->rq_tail);
err_printf(m, " CTL: 0x%08x\n", ee->ctl);
err_printf(m, " MODE: 0x%08x\n", ee->mode);
err_printf(m, " HWS: 0x%08x\n", ee->hws);
@ -1230,6 +1231,10 @@ static void i915_gem_record_rings(struct drm_i915_private *dev_priv,
error->simulated |=
request->ctx->flags & CONTEXT_NO_ERROR_CAPTURE;
ee->rq_head = request->head;
ee->rq_post = request->postfix;
ee->rq_tail = request->tail;
ring = request->ring;
ee->cpu_ring_head = ring->head;
ee->cpu_ring_tail = ring->tail;