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Date: Tue, 23 Nov 2021 15:03:55 -0800
From: Bjorn Andersson <bjorn.andersson@...aro.org>
To: Akhil P Oommen <akhilpo@...eaurora.org>
Cc: freedreno <freedreno@...ts.freedesktop.org>,
dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
Rob Clark <robdclark@...il.com>,
Douglas Anderson <dianders@...omium.org>,
Jordan Crouse <jordan@...micpenguin.net>,
Matthias Kaehlcke <mka@...omium.org>,
Jonathan Marek <jonathan@...ek.ca>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...ainline.org>,
Daniel Vetter <daniel@...ll.ch>,
David Airlie <airlied@...ux.ie>,
Konrad Dybcio <konrad.dybcio@...ainline.org>,
Lee Jones <lee.jones@...aro.org>,
Linux Patches Robot
<linux-patches-robot@...omeos-missing-patches.google.com.iam.gserviceaccount.com>,
Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
Sean Paul <sean@...rly.run>,
Sharat Masetty <smasetty@...eaurora.org>,
Stephen Boyd <swboyd@...omium.org>,
St?phane Marchesin <marcheu@...omium.org>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/6] drm/msm/a6xx: Capture gmu log in devcoredump
On Tue 23 Nov 13:17 PST 2021, Akhil P Oommen wrote:
> Capture gmu log in coredump to enhance debugging.
>
> Signed-off-by: Akhil P Oommen <akhilpo@...eaurora.org>
> ---
>
> Changes in v2:
> - Fix kernel test robot's warning about size_t's format specifier
>
> drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c | 41 +++++++++++++++++++++++++++++
> drivers/gpu/drm/msm/adreno/adreno_gpu.c | 2 +-
> drivers/gpu/drm/msm/adreno/adreno_gpu.h | 2 ++
> 3 files changed, 44 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
> index e8f65cd..e6f5571 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
> @@ -42,6 +42,8 @@ struct a6xx_gpu_state {
> struct a6xx_gpu_state_obj *cx_debugbus;
> int nr_cx_debugbus;
>
> + struct msm_gpu_state_bo *gmu_log;
> +
> struct list_head objs;
> };
>
> @@ -800,6 +802,30 @@ static void a6xx_get_gmu_registers(struct msm_gpu *gpu,
> &a6xx_state->gmu_registers[2], false);
> }
>
> +static void a6xx_get_gmu_log(struct msm_gpu *gpu,
> + struct a6xx_gpu_state *a6xx_state)
> +{
> + struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
> + struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu);
> + struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
> + struct msm_gpu_state_bo *gmu_log;
> +
> + gmu_log = state_kcalloc(a6xx_state,
> + 1, sizeof(*a6xx_state->gmu_log));
This line isn't even 80 chars long, so I see no reason to wrap it and if
you ran checkpatch --strict on this patch it would complain about how
you indent that second line as well.
It would also look better with sizeof(*gmu_log), even though they should
have the same size today...
> + if (!gmu_log)
> + return;
> +
> + gmu_log->iova = gmu->log.iova;
> + gmu_log->size = gmu->log.size;
> + gmu_log->data = kvzalloc(gmu_log->size, GFP_KERNEL);
> + if (!gmu_log->data)
> + return;
> +
> + memcpy(gmu_log->data, gmu->log.virt, gmu->log.size);
> +
> + a6xx_state->gmu_log = gmu_log;
> +}
> +
> #define A6XX_GBIF_REGLIST_SIZE 1
> static void a6xx_get_registers(struct msm_gpu *gpu,
> struct a6xx_gpu_state *a6xx_state,
> @@ -937,6 +963,8 @@ struct msm_gpu_state *a6xx_gpu_state_get(struct msm_gpu *gpu)
>
> a6xx_get_gmu_registers(gpu, a6xx_state);
>
> + a6xx_get_gmu_log(gpu, a6xx_state);
> +
> /* If GX isn't on the rest of the data isn't going to be accessible */
> if (!a6xx_gmu_gx_is_on(&a6xx_gpu->gmu))
> return &a6xx_state->base;
> @@ -978,6 +1006,9 @@ static void a6xx_gpu_state_destroy(struct kref *kref)
> struct a6xx_gpu_state *a6xx_state = container_of(state,
> struct a6xx_gpu_state, base);
>
> + if (a6xx_state->gmu_log && a6xx_state->gmu_log->data)
> + kvfree(a6xx_state->gmu_log->data);
> +
> list_for_each_entry_safe(obj, tmp, &a6xx_state->objs, node)
> kfree(obj);
>
> @@ -1191,6 +1222,16 @@ void a6xx_show(struct msm_gpu *gpu, struct msm_gpu_state *state,
>
> adreno_show(gpu, state, p);
>
> + drm_puts(p, "gmu-log:\n");
> + if (a6xx_state->gmu_log) {
> + struct msm_gpu_state_bo *gmu_log = a6xx_state->gmu_log;
> +
> + drm_printf(p, " iova: 0x%016llx\n", gmu_log->iova);
> + drm_printf(p, " size: %zu\n", gmu_log->size);
> + adreno_show_object(p, &gmu_log->data, gmu_log->size,
> + &gmu_log->encoded);
> + }
> +
> drm_puts(p, "registers:\n");
> for (i = 0; i < a6xx_state->nr_registers; i++) {
> struct a6xx_gpu_state_obj *obj = &a6xx_state->registers[i];
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> index 1539b8e..b43346e 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> @@ -638,7 +638,7 @@ static char *adreno_gpu_ascii85_encode(u32 *src, size_t len)
> }
>
> /* len is expected to be in bytes */
> -static void adreno_show_object(struct drm_printer *p, void **ptr, int len,
> +void adreno_show_object(struct drm_printer *p, void **ptr, int len,
> bool *encoded)
Please indent your broken lines by the ( on the line before.
Regards,
Bjorn
> {
> if (!*ptr || !len)
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> index 225c277..6762308 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> @@ -306,6 +306,8 @@ void adreno_gpu_state_destroy(struct msm_gpu_state *state);
>
> int adreno_gpu_state_get(struct msm_gpu *gpu, struct msm_gpu_state *state);
> int adreno_gpu_state_put(struct msm_gpu_state *state);
> +void adreno_show_object(struct drm_printer *p, void **ptr, int len,
> + bool *encoded);
>
> /*
> * Common helper function to initialize the default address space for arm-smmu
> --
> QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
> of Code Aurora Forum, hosted by The Linux Foundation.
>
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