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      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 
     37 void
     38 fd_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 
     60 void
     61 fd_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