src/gallium/drivers/panfrost/pan_screen.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2018-2019 Alyssa Rosenzweig
   4  * Copyright 2018-2019 Collabora, Ltd.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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  27  **************************************************************************/
  28
  29 #ifndef PAN_SCREEN_H
  30 #define PAN_SCREEN_H
  31
  32 #include <xf86drm.h>
  33 #include "pipe/p_screen.h"
  34 #include "pipe/p_defines.h"
  35 #include "renderonly/renderonly.h"
  36 #include "util/u_dynarray.h"
  37 #include "util/bitset.h"
  38
  39 #include <panfrost-misc.h>
  40 #include "pan_allocate.h"
  41
  42 struct panfrost_batch;
  43 struct panfrost_context;
  44 struct panfrost_resource;
  45 struct panfrost_screen;
  46
  47 /* Driver limits */
  48 #define PAN_MAX_CONST_BUFFERS 16
  49
  50 /* Transient slab size. This is a balance between fragmentation against cache
  51  * locality and ease of bookkeeping */
  52
  53 #define TRANSIENT_SLAB_PAGES (32) /* 128kb */
  54 #define TRANSIENT_SLAB_SIZE (4096 * TRANSIENT_SLAB_PAGES)
  55
  56 /* Maximum number of transient slabs so we don't need dynamic arrays. Most
  57  * interesting Mali boards are 4GB RAM max, so if the entire RAM was filled
  58  * with transient slabs, you could never exceed (4GB / TRANSIENT_SLAB_SIZE)
  59  * allocations anyway. By capping, we can use a fixed-size bitset for tracking
  60  * free slabs, eliminating quite a bit of complexity. We can pack the free
  61  * state of 8 slabs into a single byte, so for 128kb transient slabs the bitset
  62  * occupies a cheap 4kb of memory */
  63
  64 #define MAX_TRANSIENT_SLABS (1024*1024 / TRANSIENT_SLAB_PAGES)
  65
  66 /* How many power-of-two levels in the BO cache do we want? 2^12
  67  * minimum chosen as it is the page size that all allocations are
  68  * rounded to */
  69
  70 #define MIN_BO_CACHE_BUCKET (12) /* 2^12 = 4KB */
  71 #define MAX_BO_CACHE_BUCKET (22) /* 2^22 = 4MB */
  72
  73 /* Fencepost problem, hence the off-by-one */
  74 #define NR_BO_CACHE_BUCKETS (MAX_BO_CACHE_BUCKET - MIN_BO_CACHE_BUCKET + 1)
  75
  76 struct panfrost_screen {
  77         struct pipe_screen base;
  78         int fd;
  79
  80         /* Properties of the GPU in use */
  81         unsigned gpu_id;
  82         bool require_sfbd;
  83
  84         drmVersionPtr kernel_version;
  85
  86         struct renderonly *ro;
  87
  88         pthread_mutex_t bo_cache_lock;
  89
  90         /* The BO cache is a set of buckets with power-of-two sizes ranging
  91          * from 2^12 (4096, the page size) to 2^(12 + MAX_BO_CACHE_BUCKETS).
  92          * Each bucket is a linked list of free panfrost_bo objects. */
  93
  94         struct list_head bo_cache[NR_BO_CACHE_BUCKETS];
  95 };
  96
  97 static inline struct panfrost_screen *
  98 pan_screen(struct pipe_screen *p)
  99 {
 100         return (struct panfrost_screen *)p;
 101 }
 102
 103 struct panfrost_fence *
 104 panfrost_fence_create(struct panfrost_context *ctx);
 105
 106 #endif /* PAN_SCREEN_H */