src/panfrost/encoder/pan_props.c

   1 /*
   2  * Copyright (C) 2019 Collabora, Ltd.
   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  * Authors:
  24  *   Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
  25  */
  26
  27 #include <xf86drm.h>
  28
  29 #include "util/u_math.h"
  30 #include "util/macros.h"
  31 #include "util/hash_table.h"
  32 #include "util/u_thread.h"
  33 #include "drm-uapi/panfrost_drm.h"
  34 #include "pan_encoder.h"
  35 #include "pan_device.h"
  36 #include "panfrost-quirks.h"
  37 #include "pan_bo.h"
  38
  39 /* Abstraction over the raw drm_panfrost_get_param ioctl for fetching
  40  * information about devices */
  41
  42 static __u64
  43 panfrost_query_raw(
  44                 int fd,
  45                 enum drm_panfrost_param param,
  46                 bool required,
  47                 unsigned default_value)
  48 {
  49         struct drm_panfrost_get_param get_param = {0,};
  50         ASSERTED int ret;
  51
  52         get_param.param = param;
  53         ret = drmIoctl(fd, DRM_IOCTL_PANFROST_GET_PARAM, &get_param);
  54
  55         if (ret) {
  56                 assert(!required);
  57                 return default_value;
  58         }
  59
  60         return get_param.value;
  61 }
  62
  63 unsigned
  64 panfrost_query_gpu_version(int fd)
  65 {
  66         return panfrost_query_raw(fd, DRM_PANFROST_PARAM_GPU_PROD_ID, true, 0);
  67 }
  68
  69 unsigned
  70 panfrost_query_core_count(int fd)
  71 {
  72         /* On older kernels, worst-case to 16 cores */
  73
  74         unsigned mask = panfrost_query_raw(fd,
  75                         DRM_PANFROST_PARAM_SHADER_PRESENT, false, 0xffff);
  76
  77         return util_bitcount(mask);
  78 }
  79
  80 unsigned
  81 panfrost_query_thread_tls_alloc(int fd)
  82 {
  83         /* On older kernels, we worst-case to 256 threads, the architectural
  84          * maximum for Midgard. On my current kernel/hardware, I'm seeing this
  85          * readback as 0, so we'll worst-case there too */
  86
  87         unsigned tls = panfrost_query_raw(fd,
  88                         DRM_PANFROST_PARAM_THREAD_TLS_ALLOC, false, 256);
  89
  90         if (tls)
  91                 return tls;
  92         else
  93                 return 256;
  94 }
  95
  96 /* Given a GPU ID like 0x860, return a prettified model name */
  97
  98 const char *
  99 panfrost_model_name(unsigned gpu_id)
 100 {
 101         switch (gpu_id) {
 102         case 0x600: return "Mali T600 (Panfrost)";
 103         case 0x620: return "Mali T620 (Panfrost)";
 104         case 0x720: return "Mali T720 (Panfrost)";
 105         case 0x820: return "Mali T820 (Panfrost)";
 106         case 0x830: return "Mali T830 (Panfrost)";
 107         case 0x750: return "Mali T760 (Panfrost)";
 108         case 0x860: return "Mali T860 (Panfrost)";
 109         case 0x880: return "Mali T880 (Panfrost)";
 110         case 0x7093: return "Mali G31 (Panfrost)";
 111         case 0x7212: return "Mali G52 (Panfrost)";
 112         default:
 113                     unreachable("Invalid GPU ID");
 114         }
 115 }
 116
 117 void
 118 panfrost_open_device(void *memctx, int fd, struct panfrost_device *dev)
 119 {
 120         dev->fd = fd;
 121         dev->memctx = memctx;
 122         dev->gpu_id = panfrost_query_gpu_version(fd);
 123         dev->core_count = panfrost_query_core_count(fd);
 124         dev->thread_tls_alloc = panfrost_query_thread_tls_alloc(fd);
 125         dev->kernel_version = drmGetVersion(fd);
 126         dev->quirks = panfrost_get_quirks(dev->gpu_id);
 127
 128         util_sparse_array_init(&dev->bo_map, sizeof(struct panfrost_bo), 512);
 129
 130         pthread_mutex_init(&dev->bo_cache.lock, NULL);
 131         list_inithead(&dev->bo_cache.lru);
 132
 133         for (unsigned i = 0; i < ARRAY_SIZE(dev->bo_cache.buckets); ++i)
 134                 list_inithead(&dev->bo_cache.buckets[i]);
 135 }
 136
 137 void
 138 panfrost_close_device(struct panfrost_device *dev)
 139 {
 140         panfrost_bo_cache_evict_all(dev);
 141         pthread_mutex_destroy(&dev->bo_cache.lock);
 142         drmFreeVersion(dev->kernel_version);
 143         util_sparse_array_finish(&dev->bo_map);
 144
 145 }