src/gallium/drivers/vc4/kernel/vc4_gem.c

   1 /*
   2  * Copyright © 2014 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 #ifdef USE_VC4_SIMULATOR
  25
  26 #include "vc4_drv.h"
  27
  28 int
  29 vc4_cl_validate(struct drm_device *dev, struct exec_info *exec)
  30 {
  31         struct drm_vc4_submit_cl *args = exec->args;
  32         void *temp = NULL;
  33         void *bin, *render;
  34         int ret = 0;
  35         uint32_t bin_offset = 0;
  36         uint32_t render_offset = bin_offset + args->bin_cl_size;
  37         uint32_t shader_rec_offset = roundup(render_offset +
  38                                              args->render_cl_size, 16);
  39         uint32_t uniforms_offset = shader_rec_offset + args->shader_rec_size;
  40         uint32_t exec_size = uniforms_offset + args->uniforms_size;
  41         uint32_t temp_size = exec_size + (sizeof(struct vc4_shader_state) *
  42                                           args->shader_rec_count);
  43
  44         if (shader_rec_offset < render_offset ||
  45             uniforms_offset < shader_rec_offset ||
  46             exec_size < uniforms_offset ||
  47             args->shader_rec_count >= (UINT_MAX /
  48                                           sizeof(struct vc4_shader_state)) ||
  49             temp_size < exec_size) {
  50                 DRM_ERROR("overflow in exec arguments\n");
  51                 goto fail;
  52         }
  53
  54         /* Allocate space where we'll store the copied in user command lists
  55          * and shader records.
  56          *
  57          * We don't just copy directly into the BOs because we need to
  58          * read the contents back for validation, and I think the
  59          * bo->vaddr is uncached access.
  60          */
  61         temp = kmalloc(temp_size, GFP_KERNEL);
  62         if (!temp) {
  63                 DRM_ERROR("Failed to allocate storage for copying "
  64                           "in bin/render CLs.\n");
  65                 ret = -ENOMEM;
  66                 goto fail;
  67         }
  68         bin = temp + bin_offset;
  69         render = temp + render_offset;
  70         exec->shader_rec_u = temp + shader_rec_offset;
  71         exec->uniforms_u = temp + uniforms_offset;
  72         exec->shader_state = temp + exec_size;
  73         exec->shader_state_size = args->shader_rec_count;
  74
  75         ret = copy_from_user(bin, args->bin_cl, args->bin_cl_size);
  76         if (ret) {
  77                 DRM_ERROR("Failed to copy in bin cl\n");
  78                 goto fail;
  79         }
  80
  81         ret = copy_from_user(render, args->render_cl, args->render_cl_size);
  82         if (ret) {
  83                 DRM_ERROR("Failed to copy in render cl\n");
  84                 goto fail;
  85         }
  86
  87         ret = copy_from_user(exec->shader_rec_u, args->shader_rec,
  88                              args->shader_rec_size);
  89         if (ret) {
  90                 DRM_ERROR("Failed to copy in shader recs\n");
  91                 goto fail;
  92         }
  93
  94         ret = copy_from_user(exec->uniforms_u, args->uniforms,
  95                              args->uniforms_size);
  96         if (ret) {
  97                 DRM_ERROR("Failed to copy in uniforms cl\n");
  98                 goto fail;
  99         }
 100
 101         exec->exec_bo = drm_gem_cma_create(dev, exec_size);
 102 #if 0
 103         if (IS_ERR(exec->exec_bo)) {
 104                 DRM_ERROR("Couldn't allocate BO for exec\n");
 105                 ret = PTR_ERR(exec->exec_bo);
 106                 exec->exec_bo = NULL;
 107                 goto fail;
 108         }
 109 #endif
 110
 111         exec->ct0ca = exec->exec_bo->paddr + bin_offset;
 112         exec->ct1ca = exec->exec_bo->paddr + render_offset;
 113
 114         exec->shader_rec_v = exec->exec_bo->vaddr + shader_rec_offset;
 115         exec->shader_rec_p = exec->exec_bo->paddr + shader_rec_offset;
 116         exec->shader_rec_size = args->shader_rec_size;
 117
 118         exec->uniforms_v = exec->exec_bo->vaddr + uniforms_offset;
 119         exec->uniforms_p = exec->exec_bo->paddr + uniforms_offset;
 120         exec->uniforms_size = args->uniforms_size;
 121
 122         ret = vc4_validate_cl(dev,
 123                               exec->exec_bo->vaddr + bin_offset,
 124                               bin,
 125                               args->bin_cl_size,
 126                               true,
 127                               exec);
 128         if (ret)
 129                 goto fail;
 130
 131         ret = vc4_validate_cl(dev,
 132                               exec->exec_bo->vaddr + render_offset,
 133                               render,
 134                               args->render_cl_size,
 135                               false,
 136                               exec);
 137         if (ret)
 138                 goto fail;
 139
 140         ret = vc4_validate_shader_recs(dev, exec);
 141
 142 fail:
 143         kfree(temp);
 144         return ret;
 145 }
 146
 147 #endif /* USE_VC4_SIMULATOR */