[Intel-gfx] [PATCH 2/3] drm/i915: Show IPEIR and IPEHR in the engine dump

[Tvrtko Ursulin]

On 17/12/2017 13:28, Chris Wilson wrote:
> A useful bit of information for inspecting GPU stalls from
> intel_engine_dump() are the error registers, IPEIR and IPEHR.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> ---
>   drivers/gpu/drm/i915/intel_engine_cs.c | 7 +++++++
>   1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
> index 510e0bc3a377..05bd9e17452c 100644
> --- a/drivers/gpu/drm/i915/intel_engine_cs.c
> +++ b/drivers/gpu/drm/i915/intel_engine_cs.c
> @@ -1757,6 +1757,13 @@ void intel_engine_dump(struct intel_engine_cs *engine,
>   	addr = intel_engine_get_last_batch_head(engine);
>   	drm_printf(m, "\tBBADDR: 0x%08x_%08x\n",
>   		   upper_32_bits(addr), lower_32_bits(addr));
> +	addr = I915_READ(RING_DMA_FADD(engine->mmio_base));
> +	drm_printf(m, "\tDMA_FADDR: 0x%08x_%08x\n",
> +		   upper_32_bits(addr), lower_32_bits(addr));

ERror capture handles this register a bit differently.

> +	drm_printf(m, "\tIPEIR: 0x%08x\n",
> +		   I915_READ(RING_IPEIR(engine->mmio_base)));
> +	drm_printf(m, "\tIPEHR: 0x%08x\n",
> +		   I915_READ(RING_IPEHR(engine->mmio_base)));

This one as well two code paths depending on the gen.

Regards,

Tvrtko

>   
>   	if (HAS_EXECLISTS(dev_priv)) {
>   		const u32 *hws = &engine->status_page.page_addr[I915_HWS_CSB_BUF0_INDEX];
>