drm/vmwgfx: add support for new TTM fault callback V5

This add the support for the new fault callback, does change anything
from driver point of view.

Improvement: store the aperture base in a variable so that we don't
call a function to get it on each fault.

Patch hasn't been tested.

V2 don't derefence bo->mem.mm_node as it's not NULL only for
   VRAM or GTT
V3 update after io_mem_reserve/io_mem_free callback balancing
V4 callback has to ioremap
V5 ioremap is done by TTM

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 41 insertions, 3 deletions

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
index 825ebe3d89d5..f3558968fdff 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
@@ -153,8 +153,7 @@ int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
                 man->gpu_offset = 0;
                 man->io_offset = dev_priv->vram_start;
                 man->io_size = dev_priv->vram_size;
-                man->flags = TTM_MEMTYPE_FLAG_FIXED |
-                    TTM_MEMTYPE_FLAG_NEEDS_IOREMAP | TTM_MEMTYPE_FLAG_MAPPABLE;
+                man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
                 man->io_addr = NULL;
                 man->available_caching = TTM_PL_MASK_CACHING;
                 man->default_caching = TTM_PL_FLAG_WC;
@@ -193,6 +192,42 @@ static void vmw_swap_notify(struct ttm_buffer_object *bo)
         vmw_dmabuf_gmr_unbind(bo);
 }
 
+static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
+{
+        struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
+        struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
+
+        mem->bus.addr = NULL;
+        mem->bus.is_iomem = false;
+        mem->bus.offset = 0;
+        mem->bus.size = mem->num_pages << PAGE_SHIFT;
+        mem->bus.base = 0;
+        if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
+                return -EINVAL;
+        switch (mem->mem_type) {
+        case TTM_PL_SYSTEM:
+                /* System memory */
+                return 0;
+        case TTM_PL_VRAM:
+                mem->bus.offset = mem->mm_node->start << PAGE_SHIFT;
+                mem->bus.base = dev_priv->vram_start;
+                mem->bus.is_iomem = true;
+                break;
+        default:
+                return -EINVAL;
+        }
+        return 0;
+}
+
+static void vmw_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
+{
+}
+
+static int vmw_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
+{
+        return 0;
+}
+
 /**
  * FIXME: We're using the old vmware polling method to sync.
  * Do this with fences instead.
@@ -248,5 +283,8 @@ struct ttm_bo_driver vmw_bo_driver = {
         .sync_obj_unref = vmw_sync_obj_unref,
         .sync_obj_ref = vmw_sync_obj_ref,
         .move_notify = vmw_move_notify,
-        .swap_notify = vmw_swap_notify
+        .swap_notify = vmw_swap_notify,
+        .fault_reserve_notify = &vmw_ttm_fault_reserve_notify,
+        .io_mem_reserve = &vmw_ttm_io_mem_reserve,
+        .io_mem_free = &vmw_ttm_io_mem_free,
 };