src/gallium/drivers/v3d/v3d_cl.c

   1 /*
   2  * Copyright © 2014-2017 Broadcom
   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
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "util/u_math.h"
  25 #include "util/ralloc.h"
  26 #include "v3d_context.h"
  27 /* The branching packets are the same across V3D versions. */
  28 #define V3D_VERSION 33
  29 #include "broadcom/common/v3d_macros.h"
  30 #include "broadcom/cle/v3dx_pack.h"
  31
  32 void
  33 v3d_init_cl(struct v3d_job *job, struct v3d_cl *cl)
  34 {
  35         cl->base = NULL;
  36         cl->next = cl->base;
  37         cl->size = 0;
  38         cl->job = job;
  39 }
  40
  41 uint32_t
  42 v3d_cl_ensure_space(struct v3d_cl *cl, uint32_t space, uint32_t alignment)
  43 {
  44         uint32_t offset = align(cl_offset(cl), alignment);
  45
  46         if (offset + space <= cl->size) {
  47                 cl->next = cl->base + offset;
  48                 return offset;
  49         }
  50
  51         v3d_bo_unreference(&cl->bo);
  52         cl->bo = v3d_bo_alloc(cl->job->v3d->screen, align(space, 4096), "CL");
  53         cl->base = v3d_bo_map(cl->bo);
  54         cl->size = cl->bo->size;
  55         cl->next = cl->base;
  56
  57         return 0;
  58 }
  59
  60 void
  61 v3d_cl_ensure_space_with_branch(struct v3d_cl *cl, uint32_t space)
  62 {
  63         if (cl_offset(cl) + space + cl_packet_length(BRANCH) <= cl->size)
  64                 return;
  65
  66         struct v3d_bo *new_bo = v3d_bo_alloc(cl->job->v3d->screen, 4096, "CL");
  67         assert(space <= new_bo->size);
  68
  69         /* Chain to the new BO from the old one. */
  70         if (cl->bo) {
  71                 cl_emit(cl, BRANCH, branch) {
  72                         branch.address = cl_address(new_bo, 0);
  73                 }
  74                 v3d_bo_unreference(&cl->bo);
  75         } else {
  76                 /* Root the first RCL/BCL BO in the job. */
  77                 v3d_job_add_bo(cl->job, cl->bo);
  78         }
  79
  80         cl->bo = new_bo;
  81         cl->base = v3d_bo_map(cl->bo);
  82         cl->size = cl->bo->size;
  83         cl->next = cl->base;
  84 }
  85
  86 void
  87 v3d_destroy_cl(struct v3d_cl *cl)
  88 {
  89         v3d_bo_unreference(&cl->bo);
  90 }