[PATCH 01/15] drm/msm: Switch to pfn mappings

Rob Clark
2022-06-25T22:55:05Z

I'm not entirely sure why we were using VM_MIXEDMAP. These are never
CoW mappings. Let's switch to be more consistent with what other
drivers and the GEM shmem helpers do.

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
drivers/gpu/drm/msm/msm_gem.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index ad7da2ca35ab..8ddbd2e001d4 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -259,7 +259,8 @@ static vm_fault_t msm_gem_fault(struct vm_fault *vmf)
VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
pfn, pfn << PAGE_SHIFT);

- ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
+ ret = vmf_insert_pfn(vma, vmf->address, pfn);
+
out_unlock:
msm_gem_unlock(obj);
out:
@@ -1051,7 +1052,7 @@ static int msm_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_struct
{
struct msm_gem_object *msm_obj = to_msm_bo(obj);

- vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
+ vma->vm_flags |= VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;
vma->vm_page_prot = msm_gem_pgprot(msm_obj, vm_get_page_prot(vma->vm_flags));

return 0;
--
2.36.1