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    drm: update user token hashing and map handles · 8d153f71
    Thomas Hellstrom 提交于
    Keep hashed user tokens, with the following changes:
    32-bit physical device addresses are mapped directly to user-tokens. No
        duplicate maps are allowed, and the addresses are assumed to be outside
        of the range 0x10000000 through 0x30000000. The user-token is identical
        to the 32-bit physical start-address of the map.
    64-bit physical device addressed are mapped to user-tokens in the range
    0x10000000 to 0x30000000 with page-size increments. The user_token should
        not be interpreted as an address.
    Other map types, like upcoming TTM maps are mapped to user-tokens in the
        range
    0x10000000 to 0x30000000 with page-size increments. The user_token should
        not be interpreted as an address.
    
    Implement hashed map lookups.
    Signed-off-by: NDave Airlie <airlied@linux.ie>
    8d153f71
drm_vm.c 17.4 KB