[PATCH 07/10] accel/ivpu: Free buffer sgt on unbind

[Jacek Lawrynowicz]

Call dma_unmap() on all buffers before to VPU is unbinded to avoid
"device driver has pending DMA allocations while released from device"
warning when DMA-API debug is enabled.

Signed-off-by: Jacek Lawrynowicz <jacek.lawrynow...@linux.intel.com>
---
 drivers/accel/ivpu/ivpu_gem.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/accel/ivpu/ivpu_gem.c b/drivers/accel/ivpu/ivpu_gem.c
index 6890d33cf352..4de454bfbf91 100644
--- a/drivers/accel/ivpu/ivpu_gem.c
+++ b/drivers/accel/ivpu/ivpu_gem.c
@@ -112,8 +112,6 @@ static void ivpu_bo_unbind_locked(struct ivpu_bo *bo)
 
        ivpu_dbg_bo(vdev, bo, "unbind");
 
-       /* TODO: dma_unmap */
-
        if (bo->mmu_mapped) {
                drm_WARN_ON(&vdev->drm, !bo->ctx);
                drm_WARN_ON(&vdev->drm, !bo->vpu_addr);
@@ -127,6 +125,18 @@ static void ivpu_bo_unbind_locked(struct ivpu_bo *bo)
                bo->vpu_addr = 0;
                bo->ctx = NULL;
        }
+
+       if (bo->base.base.import_attach)
+               return;
+
+       dma_resv_lock(bo->base.base.resv, NULL);
+       if (bo->base.sgt) {
+               dma_unmap_sgtable(vdev->drm.dev, bo->base.sgt, 
DMA_BIDIRECTIONAL, 0);
+               sg_free_table(bo->base.sgt);
+               kfree(bo->base.sgt);
+               bo->base.sgt = NULL;
+       }
+       dma_resv_unlock(bo->base.base.resv);
 }
 
 static void ivpu_bo_unbind(struct ivpu_bo *bo)
-- 
2.43.0