On Thu, Nov 18, 2021 at 2:21 AM Akhil P Oommen <akhilpo@xxxxxxxxxxxxxx> wrote:
>
> Capture gmu log in coredump to enhance debugging.
>
> Signed-off-by: Akhil P Oommen <akhilpo@xxxxxxxxxxxxxx>
> ---
>
> 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 7501849..9fa3fa6 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));
> + 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: %d\n", gmu_log->size);
fwiw, that wants to be:
+ drm_printf(p, " size: %zu\n", gmu_log->size);
with that fixed, r-b
BR,
-R
> + 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 7486652..7d1ff20 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> @@ -630,7 +630,7 @@ 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)
> {
> 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.
>
