1/*
2 * Copyright © 2020 Igalia S.L.
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#include "freedreno_dev_info.h"
25#include "freedreno_uuid.h"
26
27#include <assert.h>
28#include <stdio.h>
29#include <string.h>
30
31#include "util/mesa-sha1.h"
32#include "git_sha1.h"
33
34/* (Re)define UUID_SIZE to avoid including vulkan.h (or p_defines.h) here. */
35#define UUID_SIZE 16
36
37void
38fd_get_driver_uuid(void *uuid)
39{
40   const char *driver_id = PACKAGE_VERSION MESA_GIT_SHA1;
41
42   /* The driver UUID is used for determining sharability of images and memory
43    * between two Vulkan instances in separate processes, but also to
44    * determining memory objects and sharability between Vulkan and OpenGL
45    * driver. People who want to share memory need to also check the device
46    * UUID.
47    */
48   struct mesa_sha1 sha1_ctx;
49   _mesa_sha1_init(&sha1_ctx);
50
51   _mesa_sha1_update(&sha1_ctx, driver_id, strlen(driver_id));
52
53   uint8_t sha1[SHA1_DIGEST_LENGTH];
54   _mesa_sha1_final(&sha1_ctx, sha1);
55
56   assert(SHA1_DIGEST_LENGTH >= UUID_SIZE);
57   memcpy(uuid, sha1, UUID_SIZE);
58}
59
60void
61fd_get_device_uuid(void *uuid, const struct fd_dev_id *id)
62{
63   struct mesa_sha1 sha1_ctx;
64   _mesa_sha1_init(&sha1_ctx);
65
66   /* The device UUID uniquely identifies the given device within the machine.
67    * Since we never have more than one device, this doesn't need to be a real
68    * UUID, so we use SHA1("freedreno" + gpu_id).
69    *
70    * @TODO: Using the GPU id could be too restrictive on the off-chance that
71    * someone would like to use this UUID to cache pre-tiled images or something
72    * of the like, and use them across devices. In the future, we could allow
73    * that by:
74    * * Being a bit loose about GPU id and hash only the generation's
75    * 'major' number (e.g, '6' instead of '630').
76    *
77    * * Include HW specific constants that are relevant for layout resolving,
78    * like minimum width to enable UBWC, tile_align_w, etc.
79    *
80    * This would allow cached device memory to be safely used from HW in
81    * (slightly) different revisions of the same generation.
82    */
83
84   static const char *device_name = "freedreno";
85   _mesa_sha1_update(&sha1_ctx, device_name, strlen(device_name));
86
87   _mesa_sha1_update(&sha1_ctx, id, sizeof(*id));
88
89   uint8_t sha1[SHA1_DIGEST_LENGTH];
90   _mesa_sha1_final(&sha1_ctx, sha1);
91
92   assert(SHA1_DIGEST_LENGTH >= UUID_SIZE);
93   memcpy(uuid, sha1, UUID_SIZE);
94}
95