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 #ifndef GEN_L3_CONFIG_H
  25 #define GEN_L3_CONFIG_H
  26
  27 #include <stdio.h>
  28
  29 #include "dev/gen_device_info.h"
  30
  31 /**
  32  * Chunk of L3 cache reserved for some specific purpose.
  33  */
  34 enum gen_l3_partition {
  35    /** Shared local memory. */
  36    GEN_L3P_SLM = 0,
  37    /** Unified return buffer. */
  38    GEN_L3P_URB,
  39    /** Union of DC and RO. */
  40    GEN_L3P_ALL,
  41    /** Data cluster RW partition. */
  42    GEN_L3P_DC,
  43    /** Union of IS, C and T. */
  44    GEN_L3P_RO,
  45    /** Instruction and state cache. */
  46    GEN_L3P_IS,
  47    /** Constant cache. */
  48    GEN_L3P_C,
  49    /** Texture cache. */
  50    GEN_L3P_T,
  51    /** Number of supported L3 partitions. */
  52    GEN_NUM_L3P
  53 };
  54
  55 /**
  56  * L3 configuration represented as the number of ways allocated for each
  57  * partition.  \sa get_l3_way_size().
  58  */
  59 struct gen_l3_config {
  60    unsigned n[GEN_NUM_L3P];
  61 };
  62
  63 /**
  64  * L3 configuration represented as a vector of weights giving the desired
  65  * relative size of each partition.  The scale is arbitrary, only the ratios
  66  * between weights will have an influence on the selection of the closest L3
  67  * configuration.
  68  */
  69 struct gen_l3_weights {
  70    float w[GEN_NUM_L3P];
  71 };
  72
  73 float gen_diff_l3_weights(struct gen_l3_weights w0, struct gen_l3_weights w1);
  74
  75 struct gen_l3_weights
  76 gen_get_default_l3_weights(const struct gen_device_info *devinfo,
  77                            bool needs_dc, bool needs_slm);
  78
  79 struct gen_l3_weights
  80 gen_get_l3_config_weights(const struct gen_l3_config *cfg);
  81
  82 const struct gen_l3_config *
  83 gen_get_default_l3_config(const struct gen_device_info *devinfo);
  84
  85 const struct gen_l3_config *
  86 gen_get_l3_config(const struct gen_device_info *devinfo,
  87                   struct gen_l3_weights w0);
  88
  89 unsigned
  90 gen_get_l3_config_urb_size(const struct gen_device_info *devinfo,
  91                            const struct gen_l3_config *cfg);
  92
  93 void gen_dump_l3_config(const struct gen_l3_config *cfg, FILE *fp);
  94
  95 enum gen_urb_deref_block_size {
  96    GEN_URB_DEREF_BLOCK_SIZE_32         = 0,
  97    GEN_URB_DEREF_BLOCK_SIZE_PER_POLY   = 1,
  98    GEN_URB_DEREF_BLOCK_SIZE_8          = 2,
  99 };
 100
 101 void gen_get_urb_config(const struct gen_device_info *devinfo,
 102                         const struct gen_l3_config *l3_cfg,
 103                         bool tess_present, bool gs_present,
 104                         const unsigned entry_size[4],
 105                         unsigned entries[4], unsigned start[4],
 106                         enum gen_urb_deref_block_size *deref_block_size);
 107
 108 #endif /* GEN_L3_CONFIG_H */