[PATCH 1/4] drm/radeon: track pinned memory (v2)

[Alex Deucher]

So we know how large an allocation we can allow.

v2: incorporate Michel's comments

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Reviewed-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/radeon/radeon.h        |  4 ++++
 drivers/gpu/drm/radeon/radeon_object.c | 16 +++++++++++++---
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index a863472..d26c61c 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -2348,6 +2348,10 @@ struct radeon_device {
 
 	struct dev_pm_domain vga_pm_domain;
 	bool have_disp_power_ref;
+
+	/* tracking pinned memory */
+	u64 vram_pin_size;
+	u64 gart_pin_size;
 };
 
 bool radeon_is_px(struct drm_device *dev);
diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
index 1b05a4d..a00cf17 100644
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -306,9 +306,13 @@ int radeon_bo_pin_restricted(struct radeon_bo *bo, u32 domain, u64 max_offset,
 		bo->pin_count = 1;
 		if (gpu_addr != NULL)
 			*gpu_addr = radeon_bo_gpu_offset(bo);
-	}
-	if (unlikely(r != 0))
+		if (domain == RADEON_GEM_DOMAIN_VRAM)
+			bo->rdev->vram_pin_size += radeon_bo_size(bo);
+		else
+			bo->rdev->gart_pin_size += radeon_bo_size(bo);
+	} else {
 		dev_err(bo->rdev->dev, "%p pin failed\n", bo);
+	}
 	return r;
 }
 
@@ -331,8 +335,14 @@ int radeon_bo_unpin(struct radeon_bo *bo)
 	for (i = 0; i < bo->placement.num_placement; i++)
 		bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
 	r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
-	if (unlikely(r != 0))
+	if (likely(r == 0)) {
+		if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
+			bo->rdev->vram_pin_size -= radeon_bo_size(bo);
+		else
+			bo->rdev->gart_pin_size -= radeon_bo_size(bo);
+	} else {
 		dev_err(bo->rdev->dev, "%p validate failed for unpin\n", bo);
+	}
 	return r;
 }
 
-- 
1.8.3.1