| Message ID | 20190919100223.13309-7-kraxel@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm: rework mmap() workflow | expand |
Hi Am 19.09.19 um 12:02 schrieb Gerd Hoffmann: > Factor out ttm vma setup to a new function. > Reduces code duplication a bit. > > Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> > --- > drivers/gpu/drm/ttm/ttm_bo_vm.c | 46 +++++++++++++++++---------------- > 1 file changed, 24 insertions(+), 22 deletions(-) > > diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c > index 4aa007edffb0..b5314ef85a3d 100644 > --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c > +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c > @@ -426,6 +426,28 @@ static struct ttm_buffer_object *ttm_bo_vm_lookup(struct ttm_bo_device *bdev, > return bo; > } > > +void ttm_bo_mmap_vma_setup(struct ttm_buffer_object *bo, struct vm_area_struct *vma) Internal helper, therefore 'static'. Best regards Thomas > +{ > + vma->vm_ops = &ttm_bo_vm_ops; > + > + /* > + * Note: We're transferring the bo reference to > + * vma->vm_private_data here. > + */ > + > + vma->vm_private_data = bo; > + > + /* > + * We'd like to use VM_PFNMAP on shared mappings, where > + * (vma->vm_flags & VM_SHARED) != 0, for performance reasons, > + * but for some reason VM_PFNMAP + x86 PAT + write-combine is very > + * bad for performance. Until that has been sorted out, use > + * VM_MIXEDMAP on all mappings. See freedesktop.org bug #75719 > + */ > + vma->vm_flags |= VM_MIXEDMAP; > + vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; > +} > + > int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma, > struct ttm_bo_device *bdev) > { > @@ -449,24 +471,7 @@ int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma, > if (unlikely(ret != 0)) > goto out_unref; > > - vma->vm_ops = &ttm_bo_vm_ops; > - > - /* > - * Note: We're transferring the bo reference to > - * vma->vm_private_data here. > - */ > - > - vma->vm_private_data = bo; > - > - /* > - * We'd like to use VM_PFNMAP on shared mappings, where > - * (vma->vm_flags & VM_SHARED) != 0, for performance reasons, > - * but for some reason VM_PFNMAP + x86 PAT + write-combine is very > - * bad for performance. Until that has been sorted out, use > - * VM_MIXEDMAP on all mappings. See freedesktop.org bug #75719 > - */ > - vma->vm_flags |= VM_MIXEDMAP; > - vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; > + ttm_bo_mmap_vma_setup(bo, vma); > return 0; > out_unref: > ttm_bo_put(bo); > @@ -481,10 +486,7 @@ int ttm_fbdev_mmap(struct vm_area_struct *vma, struct ttm_buffer_object *bo) > > ttm_bo_get(bo); > > - vma->vm_ops = &ttm_bo_vm_ops; > - vma->vm_private_data = bo; > - vma->vm_flags |= VM_MIXEDMAP; > - vma->vm_flags |= VM_IO | VM_DONTEXPAND; > + ttm_bo_mmap_vma_setup(bo, vma); > return 0; > } > EXPORT_SYMBOL(ttm_fbdev_mmap); >
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c index 4aa007edffb0..b5314ef85a3d 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c @@ -426,6 +426,28 @@ static struct ttm_buffer_object *ttm_bo_vm_lookup(struct ttm_bo_device *bdev, return bo; } +void ttm_bo_mmap_vma_setup(struct ttm_buffer_object *bo, struct vm_area_struct *vma) +{ + vma->vm_ops = &ttm_bo_vm_ops; + + /* + * Note: We're transferring the bo reference to + * vma->vm_private_data here. + */ + + vma->vm_private_data = bo; + + /* + * We'd like to use VM_PFNMAP on shared mappings, where + * (vma->vm_flags & VM_SHARED) != 0, for performance reasons, + * but for some reason VM_PFNMAP + x86 PAT + write-combine is very + * bad for performance. Until that has been sorted out, use + * VM_MIXEDMAP on all mappings. See freedesktop.org bug #75719 + */ + vma->vm_flags |= VM_MIXEDMAP; + vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; +} + int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma, struct ttm_bo_device *bdev) { @@ -449,24 +471,7 @@ int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma, if (unlikely(ret != 0)) goto out_unref; - vma->vm_ops = &ttm_bo_vm_ops; - - /* - * Note: We're transferring the bo reference to - * vma->vm_private_data here. - */ - - vma->vm_private_data = bo; - - /* - * We'd like to use VM_PFNMAP on shared mappings, where - * (vma->vm_flags & VM_SHARED) != 0, for performance reasons, - * but for some reason VM_PFNMAP + x86 PAT + write-combine is very - * bad for performance. Until that has been sorted out, use - * VM_MIXEDMAP on all mappings. See freedesktop.org bug #75719 - */ - vma->vm_flags |= VM_MIXEDMAP; - vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; + ttm_bo_mmap_vma_setup(bo, vma); return 0; out_unref: ttm_bo_put(bo); @@ -481,10 +486,7 @@ int ttm_fbdev_mmap(struct vm_area_struct *vma, struct ttm_buffer_object *bo) ttm_bo_get(bo); - vma->vm_ops = &ttm_bo_vm_ops; - vma->vm_private_data = bo; - vma->vm_flags |= VM_MIXEDMAP; - vma->vm_flags |= VM_IO | VM_DONTEXPAND; + ttm_bo_mmap_vma_setup(bo, vma); return 0; } EXPORT_SYMBOL(ttm_fbdev_mmap);
Factor out ttm vma setup to a new function. Reduces code duplication a bit. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> --- drivers/gpu/drm/ttm/ttm_bo_vm.c | 46 +++++++++++++++++---------------- 1 file changed, 24 insertions(+), 22 deletions(-)