ttm_placement.h

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/*
 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
 */

#ifndef _TTM_PLACEMENT_H_
#define _TTM_PLACEMENT_H_
/*
 * Memory regions for data placement.
 */

#define TTM_PL_SYSTEM           0
#define TTM_PL_TT               1
#define TTM_PL_VRAM             2
#define TTM_PL_PRIV0            3
#define TTM_PL_PRIV1            4
#define TTM_PL_PRIV2            5
#define TTM_PL_PRIV3            6
#define TTM_PL_PRIV4            7
#define TTM_PL_PRIV5            8
#define TTM_PL_SWAPPED          15

#define TTM_PL_FLAG_SYSTEM      (1 << TTM_PL_SYSTEM)
#define TTM_PL_FLAG_TT          (1 << TTM_PL_TT)
#define TTM_PL_FLAG_VRAM        (1 << TTM_PL_VRAM)
#define TTM_PL_FLAG_PRIV0       (1 << TTM_PL_PRIV0)
#define TTM_PL_FLAG_PRIV1       (1 << TTM_PL_PRIV1)
#define TTM_PL_FLAG_PRIV2       (1 << TTM_PL_PRIV2)
#define TTM_PL_FLAG_PRIV3       (1 << TTM_PL_PRIV3)
#define TTM_PL_FLAG_PRIV4       (1 << TTM_PL_PRIV4)
#define TTM_PL_FLAG_PRIV5       (1 << TTM_PL_PRIV5)
#define TTM_PL_FLAG_SWAPPED     (1 << TTM_PL_SWAPPED)
#define TTM_PL_MASK_MEM         0x0000FFFF

/*
 * Other flags that affects data placement.
 * TTM_PL_FLAG_CACHED indicates cache-coherent mappings
 * if available.
 * TTM_PL_FLAG_SHARED means that another application may
 * reference the buffer.
 * TTM_PL_FLAG_NO_EVICT means that the buffer may never
 * be evicted to make room for other buffers.
 */

#define TTM_PL_FLAG_CACHED      (1 << 16)
#define TTM_PL_FLAG_UNCACHED    (1 << 17)
#define TTM_PL_FLAG_WC          (1 << 18)
#define TTM_PL_FLAG_SHARED      (1 << 20)
#define TTM_PL_FLAG_NO_EVICT    (1 << 21)

#define TTM_PL_MASK_CACHING     (TTM_PL_FLAG_CACHED | \
                 TTM_PL_FLAG_UNCACHED | \
                 TTM_PL_FLAG_WC)

#define TTM_PL_MASK_MEMTYPE     (TTM_PL_MASK_MEM | TTM_PL_MASK_CACHING)

/*
 * Access flags to be used for CPU- and GPU- mappings.
 * The idea is that the TTM synchronization mechanism will
 * allow concurrent READ access and exclusive write access.
 * Currently GPU- and CPU accesses are exclusive.
 */

#define TTM_ACCESS_READ         (1 << 0)
#define TTM_ACCESS_WRITE        (1 << 1)

#endif