[PATCH 2/2] drm/amdkfd: debug message to count successfully migrated pages

[Philip Yang]

Not all migrate.cpages returned from migrate_vma_setup can be migrated,
for example non anonymous page, or out of device memory. So after
migrate_vma_pages returns, add debug message to count pages are
successfully migrated which has MIGRATE_PFN_VALID and
MIGRATE_PFN_MIGRATE flag set.

Signed-off-by: Philip Yang <philip.y...@amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c 
b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
index a14d0077e262..6d8634e40b3b 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
@@ -268,6 +268,19 @@ static void svm_migrate_put_sys_page(unsigned long addr)
        put_page(page);
 }
 
+static unsigned long svm_migrate_successful_pages(struct migrate_vma *migrate)
+{
+       unsigned long cpages = 0;
+       unsigned long i;
+
+       for (i = 0; i < migrate->npages; i++) {
+               if (migrate->src[i] & MIGRATE_PFN_VALID &&
+                   migrate->src[i] & MIGRATE_PFN_MIGRATE)
+                       cpages++;
+       }
+       return cpages;
+}
+
 static int
 svm_migrate_copy_to_vram(struct amdgpu_device *adev, struct svm_range *prange,
                         struct migrate_vma *migrate, struct dma_fence **mfence,
@@ -429,6 +442,10 @@ svm_migrate_vma_to_vram(struct amdgpu_device *adev, struct 
svm_range *prange,
 
        r = svm_migrate_copy_to_vram(adev, prange, &migrate, &mfence, scratch);
        migrate_vma_pages(&migrate);
+
+       pr_debug("successful/cpages/npages 0x%lx/0x%lx/0x%lx\n",
+               svm_migrate_successful_pages(&migrate), cpages, migrate.npages);
+
        svm_migrate_copy_done(adev, mfence);
        migrate_vma_finalize(&migrate);
 
@@ -665,6 +682,10 @@ svm_migrate_vma_to_ram(struct amdgpu_device *adev, struct 
svm_range *prange,
        r = svm_migrate_copy_to_ram(adev, prange, &migrate, &mfence,
                                    scratch, npages);
        migrate_vma_pages(&migrate);
+
+       pr_debug("successful/cpages/npages 0x%lx/0x%lx/0x%lx\n",
+               svm_migrate_successful_pages(&migrate), cpages, migrate.npages);
+
        svm_migrate_copy_done(adev, mfence);
        migrate_vma_finalize(&migrate);
        svm_range_dma_unmap(adev->dev, scratch, 0, npages);
-- 
2.17.1