[PATCH] drm/amdgpu: add vm fault information to devcoredump

[Sunil Khatri]

Add page fault information to the devcoredump.

Output of devcoredump:
**** AMDGPU Device Coredump ****
version: 1
kernel: 6.7.0-amd-staging-drm-next
module: amdgpu
time: 29.725011811
process_name: soft_recovery_p PID: 1720

Ring timed out details
IP Type: 0 Ring Name: gfx_0.0.0

[gfxhub] Page fault observed for GPU family:143
Faulty page starting at address 0x0000000000000000
Protection fault status register:0x301031

VRAM is lost due to GPU reset!

Signed-off-by: Sunil Khatri <sunil.kha...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c | 15 ++++++++++++++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h |  1 +
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
index 147100c27c2d..d7fea6cdf2f9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
@@ -203,8 +203,20 @@ amdgpu_devcoredump_read(char *buffer, loff_t offset, 
size_t count,
                           coredump->ring->name);
        }
 
+       if (coredump->fault_info.status) {
+               struct amdgpu_vm_fault_info *fault_info = &coredump->fault_info;
+
+               drm_printf(&p, "\n[%s] Page fault observed for GPU family:%d\n",
+                          fault_info->vmhub ? "mmhub" : "gfxhub",
+                          coredump->adev->family);
+               drm_printf(&p, "Faulty page starting at address 0x%016llx\n",
+                          fault_info->addr);
+               drm_printf(&p, "Protection fault status register:0x%x\n",
+                          fault_info->status);
+       }
+
        if (coredump->reset_vram_lost)
-               drm_printf(&p, "VRAM is lost due to GPU reset!\n");
+               drm_printf(&p, "\nVRAM is lost due to GPU reset!\n");
        if (coredump->adev->reset_info.num_regs) {
                drm_printf(&p, "AMDGPU register dumps:\nOffset:     Value:\n");
 
@@ -253,6 +265,7 @@ void amdgpu_coredump(struct amdgpu_device *adev, bool 
vram_lost,
        if (job) {
                s_job = &job->base;
                coredump->ring = to_amdgpu_ring(s_job->sched);
+               coredump->fault_info = job->vm->fault_info;
        }
 
        coredump->adev = adev;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h
index 60522963aaca..3197955264f9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h
@@ -98,6 +98,7 @@ struct amdgpu_coredump_info {
        struct timespec64               reset_time;
        bool                            reset_vram_lost;
        struct amdgpu_ring                      *ring;
+       struct amdgpu_vm_fault_info     fault_info;
 };
 #endif
 
-- 
2.34.1