From: Chris Wilson Date: Tue, 4 Oct 2016 20:11:30 +0000 (+0100) Subject: drm/i915: Show bounds of active request in the ring on GPU hang X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=cdb324bde5700725f04172bbeb6ef0bbbb6886c3;p=linux-beck.git drm/i915: Show bounds of active request in the ring on GPU hang 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 Cc: Mika Kuoppala Reviewed-by: Mika Kuoppala Link: http://patchwork.freedesktop.org/patch/msgid/20161004201132.21801-6-chris@chris-wilson.co.uk --- diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index f8c66eea06bc..4613f031d127 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -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; diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c index 2bbab226a46c..8b85efbdfa04 100644 --- a/drivers/gpu/drm/i915/i915_gpu_error.c +++ b/drivers/gpu/drm/i915/i915_gpu_error.c @@ -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;