drm/msm/a6xx: Capture gmu log in devcoredump

Capture gmu log in coredump to enhance debugging.

Signed-off-by: Akhil P Oommen <akhilpo@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Link: https://lore.kernel.org/r/20211124214151.1427022-2-robdclark@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
index 6e90209..f1b1a9b 100644 (file)
--- 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);
+               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 (file)
--- 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 (file)
--- 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