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/*
* Copyright © 2020 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "intel_uuid.h"
#include "git_sha1.h"
#include "util/mesa-sha1.h"
void
intel_uuid_compute_device_id(uint8_t *uuid,
const struct intel_device_info *devinfo,
size_t size)
{
/* The device UUID uniquely identifies the given device within the machine.
* We use the device information along with PCI information to make sure we
* have different UUIDs on a system with multiple identical (discrete)
* GPUs.
*/
/* We want to have UUID matching between the different drivers (outside the
* Mesa project). This structure has been agreed with the various drivers
* to be the generated UUID.
*
* Consult other drivers before changing this.
*/
struct device_uuid {
uint16_t vendor_id;
uint16_t device_id;
uint16_t revision_id;
uint16_t pci_domain;
uint8_t pci_bus;
uint8_t pci_dev;
uint8_t pci_func;
uint8_t padding[4];
uint8_t sub_device_id; /* Tile number */
} shared_uuid = {
.vendor_id = 0x8086,
.device_id = devinfo->pci_device_id,
.revision_id = devinfo->pci_revision_id,
.pci_domain = devinfo->pci_domain,
.pci_bus = devinfo->pci_bus,
.pci_dev = devinfo->pci_dev,
.pci_func = devinfo->pci_func,
};
/* All the users have a 16byte UUID */
assert(size == 16);
assert(sizeof(shared_uuid) == 16);
memcpy(uuid, &shared_uuid, size);
}
void
intel_uuid_compute_driver_id(uint8_t *uuid,
const struct intel_device_info *devinfo,
size_t size)
{
const char* intelDriver = PACKAGE_VERSION MESA_GIT_SHA1;
struct mesa_sha1 sha1_ctx;
uint8_t sha1[20];
assert(size <= sizeof(sha1));
/* The driver UUID is used for determining sharability of images and memory
* between two Vulkan instances in separate processes, but also to
* determining memory objects and sharability between Vulkan and OpenGL
* driver. People who want to share memory need to also check the device
* UUID.
*/
_mesa_sha1_init(&sha1_ctx);
_mesa_sha1_update(&sha1_ctx, intelDriver, strlen(intelDriver));
_mesa_sha1_update(&sha1_ctx, &devinfo->has_bit6_swizzle,
sizeof(devinfo->has_bit6_swizzle));
_mesa_sha1_final(&sha1_ctx, sha1);
memcpy(uuid, sha1, size);
}
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