[PATCH 8/8] drm/amdgpu: add drm buddy support to amdgpu
Matthew Auld
matthew.auld at intel.com
Wed Nov 3 19:25:19 UTC 2021
On 25/10/2021 14:00, Arunpravin wrote:
> - Remove drm_mm references and replace with drm buddy functionalities
> - Add res cursor support for drm buddy
>
> Signed-off-by: Arunpravin <Arunpravin.PaneerSelvam at amd.com>
<snip>
> + spin_lock(&mgr->lock);
> + r = drm_buddy_alloc(mm, (uint64_t)place->fpfn << PAGE_SHIFT,
> + (uint64_t)lpfn << PAGE_SHIFT,
> + (uint64_t)n_pages << PAGE_SHIFT,
> + min_page_size, &node->blocks,
> + node->flags);
Is spinlock + GFP_KERNEL allowed?
> + spin_unlock(&mgr->lock);
> +
> + if (unlikely(r))
> + goto error_free_blocks;
> +
> pages_left -= pages;
> ++i;
>
> if (pages > pages_left)
> pages = pages_left;
> }
> - spin_unlock(&mgr->lock);
> +
> + /* Free unused pages for contiguous allocation */
> + if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
> + uint64_t actual_size = (uint64_t)node->base.num_pages << PAGE_SHIFT;
> +
> + r = drm_buddy_free_unused_pages(mm,
> + actual_size,
> + &node->blocks);
Needs some locking.
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