src/intel/common/gen_l3_config.h

   1 /*
   2  * Copyright (c) 2015 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include <stdio.h>
  25
  26 #include "gen_device_info.h"
  27
  28 /**
  29  * Chunk of L3 cache reserved for some specific purpose.
  30  */
  31 enum gen_l3_partition {
  32    /** Shared local memory. */
  33    GEN_L3P_SLM = 0,
  34    /** Unified return buffer. */
  35    GEN_L3P_URB,
  36    /** Union of DC and RO. */
  37    GEN_L3P_ALL,
  38    /** Data cluster RW partition. */
  39    GEN_L3P_DC,
  40    /** Union of IS, C and T. */
  41    GEN_L3P_RO,
  42    /** Instruction and state cache. */
  43    GEN_L3P_IS,
  44    /** Constant cache. */
  45    GEN_L3P_C,
  46    /** Texture cache. */
  47    GEN_L3P_T,
  48    /** Number of supported L3 partitions. */
  49    GEN_NUM_L3P
  50 };
  51
  52 /**
  53  * L3 configuration represented as the number of ways allocated for each
  54  * partition.  \sa get_l3_way_size().
  55  */
  56 struct gen_l3_config {
  57    unsigned n[GEN_NUM_L3P];
  58 };
  59
  60 /**
  61  * L3 configuration represented as a vector of weights giving the desired
  62  * relative size of each partition.  The scale is arbitrary, only the ratios
  63  * between weights will have an influence on the selection of the closest L3
  64  * configuration.
  65  */
  66 struct gen_l3_weights {
  67    float w[GEN_NUM_L3P];
  68 };
  69
  70 float gen_diff_l3_weights(struct gen_l3_weights w0, struct gen_l3_weights w1);
  71
  72 struct gen_l3_weights
  73 gen_get_default_l3_weights(const struct gen_device_info *devinfo,
  74                            bool needs_dc, bool needs_slm);
  75
  76 struct gen_l3_weights
  77 gen_get_l3_config_weights(const struct gen_l3_config *cfg);
  78
  79 const struct gen_l3_config *
  80 gen_get_default_l3_config(const struct gen_device_info *devinfo);
  81
  82 const struct gen_l3_config *
  83 gen_get_l3_config(const struct gen_device_info *devinfo,
  84                   struct gen_l3_weights w0);
  85
  86 unsigned
  87 gen_get_l3_config_urb_size(const struct gen_device_info *devinfo,
  88                            const struct gen_l3_config *cfg);
  89
  90 void gen_dump_l3_config(const struct gen_l3_config *cfg, FILE *fp);