diff options
| author | Abdiel Janulgue <abdiel.janulgue@linux.intel.com> | 2020-01-03 23:41:35 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-01-04 20:57:46 +0300 |
| commit | 4e598fad226be0d044d318b6c49cec2ec2b72be3 (patch) | |
| tree | af71ca5cb9704c866aad5bfdb439b049ab52a089 /drivers/gpu/drm/i915/gem | |
| parent | b2fcaac98bbec6036d17a0a120a19b64e65f6534 (diff) | |
| download | linux-4e598fad226be0d044d318b6c49cec2ec2b72be3.tar.xz | |
drm/i915/gem: Extend mmap support for lmem
Local memory objects are similar to our usual scatterlist, but instead
of using the struct page stored therein, we need to use the
sg->dma_address.
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200103204137.2131004-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/gem')
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_mman.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c index ed0d9a2f0e7b..b9fdac2f9003 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c @@ -213,6 +213,7 @@ static vm_fault_t i915_error_to_vmf_fault(int err) case -EIO: /* shmemfs failure from swap device */ case -EFAULT: /* purged object */ case -ENODEV: /* bad object, how did you get here! */ + case -ENXIO: /* unable to access backing store (on device) */ return VM_FAULT_SIGBUS; case -ENOSPC: /* shmemfs allocation failure */ @@ -237,11 +238,9 @@ static vm_fault_t vm_fault_cpu(struct vm_fault *vmf) struct vm_area_struct *area = vmf->vma; struct i915_mmap_offset *mmo = area->vm_private_data; struct drm_i915_gem_object *obj = mmo->obj; + resource_size_t iomap; int err; - if (unlikely(!i915_gem_object_has_struct_page(obj))) - return VM_FAULT_SIGBUS; - /* Sanity check that we allow writing into this object */ if (unlikely(i915_gem_object_is_readonly(obj) && area->vm_flags & VM_WRITE)) @@ -251,10 +250,16 @@ static vm_fault_t vm_fault_cpu(struct vm_fault *vmf) if (err) goto out; + iomap = -1; + if (!i915_gem_object_type_has(obj, I915_GEM_OBJECT_HAS_STRUCT_PAGE)) { + iomap = obj->mm.region->iomap.base; + iomap -= obj->mm.region->region.start; + } + /* PTEs are revoked in obj->ops->put_pages() */ - err = remap_io_sg_page(area, - area->vm_start, area->vm_end - area->vm_start, - obj->mm.pages->sgl); + err = remap_io_sg(area, + area->vm_start, area->vm_end - area->vm_start, + obj->mm.pages->sgl, iomap); if (area->vm_flags & VM_WRITE) { GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj)); @@ -553,7 +558,9 @@ __assign_mmap_offset(struct drm_file *file, } if (mmap_type != I915_MMAP_TYPE_GTT && - !i915_gem_object_has_struct_page(obj)) { + !i915_gem_object_type_has(obj, + I915_GEM_OBJECT_HAS_STRUCT_PAGE | + I915_GEM_OBJECT_HAS_IOMEM)) { err = -ENODEV; goto out; } |