LXR linux/drivers/gpu/drm/i915/gt/intel

   1/* SPDX-License-Identifier: MIT */
   2/*
   3 * Copyright © 2015 Intel Corporation
   4 */
   5
   6#ifndef INTEL_MOCS_H
   7#define INTEL_MOCS_H
   8
   9/**
  10 * DOC: Memory Objects Control State (MOCS)
  11 *
  12 * Motivation:
  13 * In previous Gens the MOCS settings was a value that was set by user land as
  14 * part of the batch. In Gen9 this has changed to be a single table (per ring)
  15 * that all batches now reference by index instead of programming the MOCS
  16 * directly.
  17 *
  18 * The one wrinkle in this is that only PART of the MOCS tables are included
  19 * in context (The GFX_MOCS_0 - GFX_MOCS_64 and the LNCFCMOCS0 - LNCFCMOCS32
  20 * registers). The rest are not (the settings for the other rings).
  21 *
  22 * This table needs to be set at system start-up because the way the table
  23 * interacts with the contexts and the GmmLib interface.
  24 *
  25 *
  26 * Implementation:
  27 *
  28 * The tables (one per supported platform) are defined in intel_mocs.c
  29 * and are programmed in the first batch after the context is loaded
  30 * (with the hardware workarounds). This will then let the usual
  31 * context handling keep the MOCS in step.
  32 */
  33
  34struct intel_engine_cs;
  35struct intel_gt;
  36
  37void intel_mocs_init(struct intel_gt *gt);
  38void intel_mocs_init_engine(struct intel_engine_cs *engine);
  39
  40#endif
  41