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Member "mesa-20.1.8/src/freedreno/drm/freedreno_ringbuffer.h" (16 Sep 2020, 5137 Bytes) of package /linux/misc/mesa-20.1.8.tar.xz:


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    1 /*
    2  * Copyright (C) 2012-2018 Rob Clark <robclark@freedesktop.org>
    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  *    Rob Clark <robclark@freedesktop.org>
   25  */
   26 
   27 #ifndef FREEDRENO_RINGBUFFER_H_
   28 #define FREEDRENO_RINGBUFFER_H_
   29 
   30 #include "util/u_debug.h"
   31 
   32 #include "freedreno_drmif.h"
   33 
   34 struct fd_submit;
   35 struct fd_ringbuffer;
   36 
   37 enum fd_ringbuffer_flags {
   38 
   39     /* Primary ringbuffer for a submit, ie. an IB1 level rb
   40      * which kernel must setup RB->IB1 CP_INDIRECT_BRANCH
   41      * packets.
   42      */
   43     FD_RINGBUFFER_PRIMARY = 0x1,
   44 
   45     /* Hint that the stateobj will be used for streaming state
   46      * that is used once or a few times and then discarded.
   47      *
   48      * For sub-allocation, non streaming stateobj's should be
   49      * sub-allocated from a page size buffer, so one long lived
   50      * state obj doesn't prevent other pages from being freed.
   51      * (Ie. it would be no worse than allocating a page sized
   52      * bo for each small non-streaming stateobj).
   53      *
   54      * But streaming stateobj's could be sub-allocated from a
   55      * larger buffer to reduce the alloc/del overhead.
   56      */
   57     FD_RINGBUFFER_STREAMING = 0x2,
   58 
   59     /* Indicates that "growable" cmdstream can be used,
   60      * consisting of multiple physical cmdstream buffers
   61      */
   62     FD_RINGBUFFER_GROWABLE = 0x4,
   63 
   64     /* Internal use only: */
   65     _FD_RINGBUFFER_OBJECT = 0x8,
   66 };
   67 
   68 /* A submit object manages/tracks all the state buildup for a "submit"
   69  * ioctl to the kernel.  Additionally, with the exception of long-lived
   70  * non-STREAMING stateobj rb's, rb's are allocated from the submit.
   71  */
   72 struct fd_submit * fd_submit_new(struct fd_pipe *pipe);
   73 
   74 /* NOTE: all ringbuffer's create from the submit should be unref'd
   75  * before destroying the submit.
   76  */
   77 void fd_submit_del(struct fd_submit *submit);
   78 
   79 /* Allocate a new rb from the submit. */
   80 struct fd_ringbuffer * fd_submit_new_ringbuffer(struct fd_submit *submit,
   81         uint32_t size, enum fd_ringbuffer_flags flags);
   82 
   83 /* in_fence_fd: -1 for no in-fence, else fence fd
   84  * out_fence_fd: NULL for no output-fence requested, else ptr to return out-fence
   85  */
   86 int fd_submit_flush(struct fd_submit *submit,
   87         int in_fence_fd, int *out_fence_fd,
   88         uint32_t *out_fence);
   89 
   90 struct fd_ringbuffer_funcs;
   91 
   92 /* the ringbuffer object is not opaque so that OUT_RING() type stuff
   93  * can be inlined.  Note that users should not make assumptions about
   94  * the size of this struct.
   95  */
   96 struct fd_ringbuffer {
   97     uint32_t *cur, *end, *start;
   98     const struct fd_ringbuffer_funcs *funcs;
   99 
  100 // size or end coudl probably go away
  101     int size;
  102     int32_t refcnt;
  103     enum fd_ringbuffer_flags flags;
  104 };
  105 
  106 /* Allocate a new long-lived state object, not associated with
  107  * a submit:
  108  */
  109 struct fd_ringbuffer * fd_ringbuffer_new_object(struct fd_pipe *pipe,
  110         uint32_t size);
  111 
  112 struct fd_ringbuffer *fd_ringbuffer_ref(struct fd_ringbuffer *ring);
  113 void fd_ringbuffer_del(struct fd_ringbuffer *ring);
  114 
  115 void fd_ringbuffer_grow(struct fd_ringbuffer *ring, uint32_t ndwords);
  116 
  117 static inline void fd_ringbuffer_emit(struct fd_ringbuffer *ring,
  118         uint32_t data)
  119 {
  120     (*ring->cur++) = data;
  121 }
  122 
  123 struct fd_reloc {
  124     struct fd_bo *bo;
  125 #define FD_RELOC_READ             0x0001
  126 #define FD_RELOC_WRITE            0x0002
  127 #define FD_RELOC_DUMP             0x0004
  128     uint32_t flags;
  129     uint32_t offset;
  130     uint32_t or;
  131     int32_t  shift;
  132     uint32_t orhi;      /* used for a5xx+ */
  133 };
  134 
  135 /* NOTE: relocs are 2 dwords on a5xx+ */
  136 
  137 void fd_ringbuffer_reloc(struct fd_ringbuffer *ring, const struct fd_reloc *reloc);
  138 uint32_t fd_ringbuffer_cmd_count(struct fd_ringbuffer *ring);
  139 uint32_t fd_ringbuffer_emit_reloc_ring_full(struct fd_ringbuffer *ring,
  140         struct fd_ringbuffer *target, uint32_t cmd_idx);
  141 
  142 static inline uint32_t
  143 offset_bytes(void *end, void *start)
  144 {
  145     return ((char *)end) - ((char *)start);
  146 }
  147 
  148 static inline uint32_t
  149 fd_ringbuffer_size(struct fd_ringbuffer *ring)
  150 {
  151     /* only really needed for stateobj ringbuffers, and won't really
  152      * do what you expect for growable rb's.. so lets just restrict
  153      * this to stateobj's for now:
  154      */
  155     debug_assert(!(ring->flags & FD_RINGBUFFER_GROWABLE));
  156     return offset_bytes(ring->cur, ring->start);
  157 }
  158 
  159 
  160 #endif /* FREEDRENO_RINGBUFFER_H_ */