src/freedreno/decode/buffers.c

   1 /*
   2  * Copyright (c) 2012 Rob Clark <robdclark@gmail.com>
   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 FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  */
  23
  24 /*
  25  * Helper lib to track gpu buffers contents/address, and map between gpu and
  26  * host address while decoding cmdstream/crashdumps
  27  */
  28
  29 #include <assert.h>
  30 #include <stdlib.h>
  31
  32 #include "buffers.h"
  33
  34 struct buffer {
  35         void *hostptr;
  36         unsigned int len;
  37         uint64_t gpuaddr;
  38
  39         /* for 'once' mode, for buffers containing cmdstream keep track per offset
  40          * into buffer of which modes it has already been dumped;
  41          */
  42         struct {
  43                 unsigned offset;
  44                 unsigned dumped_mask;
  45         } offsets[64];
  46         unsigned noffsets;
  47 };
  48
  49 static struct buffer buffers[512];
  50 static int nbuffers;
  51
  52 static int
  53 buffer_contains_gpuaddr(struct buffer *buf, uint64_t gpuaddr, uint32_t len)
  54 {
  55         return (buf->gpuaddr <= gpuaddr) && (gpuaddr < (buf->gpuaddr + buf->len));
  56 }
  57
  58 static int
  59 buffer_contains_hostptr(struct buffer *buf, void *hostptr)
  60 {
  61         return (buf->hostptr <= hostptr) && (hostptr < (buf->hostptr + buf->len));
  62 }
  63
  64
  65 uint64_t
  66 gpuaddr(void *hostptr)
  67 {
  68         int i;
  69         for (i = 0; i < nbuffers; i++)
  70                 if (buffer_contains_hostptr(&buffers[i], hostptr))
  71                         return buffers[i].gpuaddr + (hostptr - buffers[i].hostptr);
  72         return 0;
  73 }
  74
  75 uint64_t
  76 gpubaseaddr(uint64_t gpuaddr)
  77 {
  78         int i;
  79         if (!gpuaddr)
  80                 return 0;
  81         for (i = 0; i < nbuffers; i++)
  82                 if (buffer_contains_gpuaddr(&buffers[i], gpuaddr, 0))
  83                         return buffers[i].gpuaddr;
  84         return 0;
  85 }
  86
  87 void *
  88 hostptr(uint64_t gpuaddr)
  89 {
  90         int i;
  91         if (!gpuaddr)
  92                 return 0;
  93         for (i = 0; i < nbuffers; i++)
  94                 if (buffer_contains_gpuaddr(&buffers[i], gpuaddr, 0))
  95                         return buffers[i].hostptr + (gpuaddr - buffers[i].gpuaddr);
  96         return 0;
  97 }
  98
  99 unsigned
 100 hostlen(uint64_t gpuaddr)
 101 {
 102         int i;
 103         if (!gpuaddr)
 104                 return 0;
 105         for (i = 0; i < nbuffers; i++)
 106                 if (buffer_contains_gpuaddr(&buffers[i], gpuaddr, 0))
 107                         return buffers[i].len + buffers[i].gpuaddr - gpuaddr;
 108         return 0;
 109 }
 110
 111 bool
 112 has_dumped(uint64_t gpuaddr, unsigned enable_mask)
 113 {
 114         if (!gpuaddr)
 115                 return false;
 116
 117         for (int i = 0; i < nbuffers; i++) {
 118                 if (buffer_contains_gpuaddr(&buffers[i], gpuaddr, 0)) {
 119                         struct buffer *b = &buffers[i];
 120                         assert(gpuaddr >= b->gpuaddr);
 121                         unsigned offset = gpuaddr - b->gpuaddr;
 122
 123                         unsigned n = 0;
 124                         while (n < b->noffsets) {
 125                                 if (offset == b->offsets[n].offset)
 126                                         break;
 127                                 n++;
 128                         }
 129
 130                         /* if needed, allocate a new offset entry: */
 131                         if (n == b->noffsets) {
 132                                 b->noffsets++;
 133                                 assert(b->noffsets < ARRAY_SIZE(b->offsets));
 134                                 b->offsets[n].dumped_mask = 0;
 135                                 b->offsets[n].offset = offset;
 136                         }
 137
 138                         if ((b->offsets[n].dumped_mask & enable_mask) == enable_mask)
 139                                 return true;
 140
 141                         b->offsets[n].dumped_mask |= enable_mask;
 142
 143                         return false;
 144                 }
 145         }
 146
 147         return false;
 148 }
 149
 150 void
 151 reset_buffers(void)
 152 {
 153         for (int i = 0; i < nbuffers; i++) {
 154                 free(buffers[i].hostptr);
 155                 buffers[i].hostptr = NULL;
 156                 buffers[i].len = 0;
 157                 buffers[i].noffsets = 0;
 158         }
 159         nbuffers = 0;
 160 }
 161
 162 /**
 163  * Record buffer contents, takes ownership of hostptr (freed in
 164  * reset_buffers())
 165  */
 166 void
 167 add_buffer(uint64_t gpuaddr, unsigned int len, void *hostptr)
 168 {
 169         int i;
 170
 171         for (i = 0; i < nbuffers; i++) {
 172                 if (buffers[i].gpuaddr == gpuaddr)
 173                         break;
 174         }
 175
 176         if (i == nbuffers) {
 177                 /* some traces, like test-perf, with some blob versions,
 178                  * seem to generate an unreasonable # of gpu buffers (a
 179                  * leak?), so just ignore them.
 180                  */
 181                 if (nbuffers >= ARRAY_SIZE(buffers)) {
 182                         free(hostptr);
 183                         return;
 184                 }
 185                 nbuffers++;
 186         }
 187
 188         buffers[i].hostptr = hostptr;
 189         buffers[i].len     = len;
 190         buffers[i].gpuaddr = gpuaddr;
 191 }