drm/amdgpu: skip printing vram_lost if needed

The vm lost status can only be obtained after a GPU reset occurs, but
sometimes a dev core dump can be happened before GPU reset. So a new
argument is added to tell the dev core dump implementation whether to
skip printing the vram_lost status in the dump.
And this patch is also trying to decouple the core dump function from
the GPU reset function, by replacing the argument amdgpu_reset_context
with amdgpu_job to specify the context for core dump.

V2: Inform user if VRAM lost check is skipped so users don't assume
VRAM wasn't lost (Alex)
Signed-off-by: Trigger Huang <Trigger.Huang@amd.com>
Suggested-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_dev_coredump.c

@@ -28,8 +28,8 @@
 #include "atom.h"
 
 #ifndef CONFIG_DEV_COREDUMP
-void amdgpu_coredump(struct amdgpu_device *adev, bool vram_lost,
-		     struct amdgpu_reset_context *reset_context)
+void amdgpu_coredump(struct amdgpu_device *adev, bool skip_vram_check,
+		     bool vram_lost, struct amdgpu_job *job)
 {
 }
 #else
@@ -315,7 +315,9 @@ amdgpu_devcoredump_read(char *buffer, loff_t offset, size_t count,
 		}
 	}
 
-	if (coredump->reset_vram_lost)
+	if (coredump->skip_vram_check)
+		drm_printf(&p, "VRAM lost check is skipped!\n");
+	else if (coredump->reset_vram_lost)
 		drm_printf(&p, "VRAM is lost due to GPU reset!\n");
 
 	return count - iter.remain;
@@ -326,12 +328,11 @@ static void amdgpu_devcoredump_free(void *data)
 	kfree(data);
 }
 
-void amdgpu_coredump(struct amdgpu_device *adev, bool vram_lost,
-		     struct amdgpu_reset_context *reset_context)
+void amdgpu_coredump(struct amdgpu_device *adev, bool skip_vram_check,
+		     bool vram_lost, struct amdgpu_job *job)
 {
-	struct amdgpu_coredump_info *coredump;
 	struct drm_device *dev = adev_to_drm(adev);
-	struct amdgpu_job *job = reset_context->job;
+	struct amdgpu_coredump_info *coredump;
 	struct drm_sched_job *s_job;
 
 	coredump = kzalloc(sizeof(*coredump), GFP_NOWAIT);
@@ -341,11 +342,12 @@ void amdgpu_coredump(struct amdgpu_device *adev, bool vram_lost,
 		return;
 	}
 
+	coredump->skip_vram_check = skip_vram_check;
 	coredump->reset_vram_lost = vram_lost;
 
-	if (reset_context->job && reset_context->job->vm) {
+	if (job && job->vm) {
+		struct amdgpu_vm *vm = job->vm;
 		struct amdgpu_task_info *ti;
-		struct amdgpu_vm *vm = reset_context->job->vm;
 
 		ti = amdgpu_vm_get_task_info_vm(vm);
 		if (ti) {

drivers/gpu/drm/amd/amdgpu/amdgpu_dev_coredump.h

@@ -26,7 +26,6 @@
 #define __AMDGPU_DEV_COREDUMP_H__
 
 #include "amdgpu.h"
-#include "amdgpu_reset.h"
 
 #ifdef CONFIG_DEV_COREDUMP
 
@@ -36,12 +35,12 @@ struct amdgpu_coredump_info {
 	struct amdgpu_device            *adev;
 	struct amdgpu_task_info         reset_task_info;
 	struct timespec64               reset_time;
+	bool                            skip_vram_check;
 	bool                            reset_vram_lost;
 	struct amdgpu_ring              *ring;
 };
 #endif
 
-void amdgpu_coredump(struct amdgpu_device *adev, bool vram_lost,
-		     struct amdgpu_reset_context *reset_context);
-
+void amdgpu_coredump(struct amdgpu_device *adev, bool skip_vram_check,
+		     bool vram_lost, struct amdgpu_job *job);
 #endif

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -5489,7 +5489,7 @@ int amdgpu_do_asic_reset(struct list_head *device_list_handle,
 				vram_lost = amdgpu_device_check_vram_lost(tmp_adev);
 
 				if (!test_bit(AMDGPU_SKIP_COREDUMP, &reset_context->flags))
-					amdgpu_coredump(tmp_adev, vram_lost, reset_context);
+					amdgpu_coredump(tmp_adev, false, vram_lost, reset_context->job);
 
 				if (vram_lost) {
 					DRM_INFO("VRAM is lost due to GPU reset!\n");