• Christoph Hellwig's avatar
    drm/i915: use vmap in i915_gem_object_map · 534a6687
    Christoph Hellwig authored
    i915_gem_object_map implements fairly low-level vmap functionality in a
    driver.  Split it into two helpers, one for remapping kernel memory which
    can use vmap, and one for I/O memory that uses vmap_pfn.
    
    The only practical difference is that alloc_vm_area prefeaults the vmalloc
    area PTEs, which doesn't seem to be required here for the kernel memory
    case (and could be added to vmap using a flag if actually required).
    Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
    Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
    Cc: Chris Wilson <chris@chris-wilson.co.uk>
    Cc: Jani Nikula <jani.nikula@linux.intel.com>
    Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
    Cc: Juergen Gross <jgross@suse.com>
    Cc: Matthew Auld <matthew.auld@intel.com>
    Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
    Cc: Minchan Kim <minchan@kernel.org>
    Cc: Nitin Gupta <ngupta@vflare.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
    Cc: Stefano Stabellini <sstabellini@kernel.org>
    Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
    Link: https://lkml.kernel.org/r/20201002122204.1534411-9-hch@lst.deSigned-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    534a6687
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