1 /*
2 * Copyright © 2020 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 "gen_uuid.h"
25 #include "git_sha1.h"
26 #include "util/mesa-sha1.h"
27
28 void
gen_uuid_compute_device_id(uint8_t * uuid,const struct isl_device * isldev,size_t size)29 gen_uuid_compute_device_id(uint8_t *uuid,
30 const struct isl_device *isldev,
31 size_t size)
32 {
33 struct mesa_sha1 sha1_ctx;
34 uint8_t sha1[20];
35 const struct gen_device_info *devinfo = isldev->info;
36
37 assert(size <= sizeof(sha1));
38
39 /* The device UUID uniquely identifies the given device within the machine.
40 * Since we never have more than one device, this doesn't need to be a real
41 * UUID. However, on the off-chance that someone tries to use this to
42 * cache pre-tiled images or something of the like, we use the PCI ID and
43 * some bits of ISL info to ensure that this is safe.
44 */
45 _mesa_sha1_init(&sha1_ctx);
46 _mesa_sha1_update(&sha1_ctx, &devinfo->chipset_id,
47 sizeof(devinfo->chipset_id));
48 _mesa_sha1_update(&sha1_ctx, &isldev->has_bit6_swizzling,
49 sizeof(isldev->has_bit6_swizzling));
50 _mesa_sha1_final(&sha1_ctx, sha1);
51 memcpy(uuid, sha1, size);
52 }
53
54 void
gen_uuid_compute_driver_id(uint8_t * uuid,const struct gen_device_info * devinfo,size_t size)55 gen_uuid_compute_driver_id(uint8_t *uuid,
56 const struct gen_device_info *devinfo,
57 size_t size)
58 {
59 const char* intelDriver = PACKAGE_VERSION MESA_GIT_SHA1;
60 struct mesa_sha1 sha1_ctx;
61 uint8_t sha1[20];
62
63 assert(size <= sizeof(sha1));
64
65 /* The driver UUID is used for determining sharability of images and memory
66 * between two Vulkan instances in separate processes, but also to
67 * determining memory objects and sharability between Vulkan and OpenGL
68 * driver. People who want to share memory need to also check the device
69 * UUID.
70 */
71 _mesa_sha1_init(&sha1_ctx);
72 _mesa_sha1_update(&sha1_ctx, intelDriver, strlen(intelDriver) * sizeof(char));
73 _mesa_sha1_final(&sha1_ctx, sha1);
74 memcpy(uuid, sha1, size);
75 }
76