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 /*
  29  * Copies in the user's binning command list and generates the validated bin
  30  * CL, along with associated data (shader records, uniforms).
  31  */
  32 static int
  33 vc4_get_bcl(struct drm_device *dev, struct vc4_exec_info *exec)
  34 {
  35         struct drm_vc4_submit_cl *args = exec->args;
  36         void *temp = NULL;
  37         void *bin;
  38         int ret = 0;
  39         uint32_t bin_offset = 0;
  40         uint32_t shader_rec_offset = roundup(bin_offset + args->bin_cl_size,
  41                                              16);
  42         uint32_t uniforms_offset = shader_rec_offset + args->shader_rec_size;
  43         uint32_t exec_size = uniforms_offset + args->uniforms_size;
  44         uint32_t temp_size = exec_size + (sizeof(struct vc4_shader_state) *
  45                                           args->shader_rec_count);
  46
  47         if (uniforms_offset < shader_rec_offset ||
  48             exec_size < uniforms_offset ||
  49             args->shader_rec_count >= (UINT_MAX /
  50                                           sizeof(struct vc4_shader_state)) ||
  51             temp_size < exec_size) {
  52                 DRM_ERROR("overflow in exec arguments\n");
  53                 goto fail;
  54         }
  55
  56         /* Allocate space where we'll store the copied in user command lists
  57          * and shader records.
  58          *
  59          * We don't just copy directly into the BOs because we need to
  60          * read the contents back for validation, and I think the
  61          * bo->vaddr is uncached access.
  62          */
  63         temp = kmalloc(temp_size, GFP_KERNEL);
  64         if (!temp) {
  65                 DRM_ERROR("Failed to allocate storage for copying "
  66                           "in bin/render CLs.\n");
  67                 ret = -ENOMEM;
  68                 goto fail;
  69         }
  70         bin = temp + bin_offset;
  71         exec->shader_rec_u = temp + shader_rec_offset;
  72         exec->uniforms_u = temp + uniforms_offset;
  73         exec->shader_state = temp + exec_size;
  74         exec->shader_state_size = args->shader_rec_count;
  75
  76         ret = copy_from_user(bin,
  77                              (void __user *)(uintptr_t)args->bin_cl,
  78                              args->bin_cl_size);
  79         if (ret) {
  80                 DRM_ERROR("Failed to copy in bin cl\n");
  81                 goto fail;
  82         }
  83
  84         ret = copy_from_user(exec->shader_rec_u,
  85                              (void __user *)(uintptr_t)args->shader_rec,
  86                              args->shader_rec_size);
  87         if (ret) {
  88                 DRM_ERROR("Failed to copy in shader recs\n");
  89                 goto fail;
  90         }
  91
  92         ret = copy_from_user(exec->uniforms_u,
  93                              (void __user *)(uintptr_t)args->uniforms,
  94                              args->uniforms_size);
  95         if (ret) {
  96                 DRM_ERROR("Failed to copy in uniforms cl\n");
  97                 goto fail;
  98         }
  99
 100         exec->exec_bo = drm_gem_cma_create(dev, exec_size);
 101 #if 0
 102         if (IS_ERR(exec->exec_bo)) {
 103                 DRM_ERROR("Couldn't allocate BO for exec\n");
 104                 ret = PTR_ERR(exec->exec_bo);
 105                 exec->exec_bo = NULL;
 106                 goto fail;
 107         }
 108 #endif
 109
 110         list_addtail(&to_vc4_bo(&exec->exec_bo->base)->unref_head,
 111                      &exec->unref_list);
 112
 113         exec->ct0ca = exec->exec_bo->paddr + bin_offset;
 114
 115         exec->bin_u = bin;
 116
 117         exec->shader_rec_v = exec->exec_bo->vaddr + shader_rec_offset;
 118         exec->shader_rec_p = exec->exec_bo->paddr + shader_rec_offset;
 119         exec->shader_rec_size = args->shader_rec_size;
 120
 121         exec->uniforms_v = exec->exec_bo->vaddr + uniforms_offset;
 122         exec->uniforms_p = exec->exec_bo->paddr + uniforms_offset;
 123         exec->uniforms_size = args->uniforms_size;
 124
 125         ret = vc4_validate_bin_cl(dev,
 126                                   exec->exec_bo->vaddr + bin_offset,
 127                                   bin,
 128                                   exec);
 129         if (ret)
 130                 goto fail;
 131
 132         ret = vc4_validate_shader_recs(dev, exec);
 133
 134 fail:
 135         kfree(temp);
 136         return ret;
 137 }
 138
 139 int
 140 vc4_cl_validate(struct drm_device *dev, struct vc4_exec_info *exec)
 141 {
 142         struct drm_vc4_submit_cl *args = exec->args;
 143         int ret = 0;
 144
 145         if (args->color_write.bits & VC4_RENDER_CONFIG_MS_MODE_4X) {
 146                 exec->tile_width = 32;
 147                 exec->tile_height = 32;
 148         } else {
 149                 exec->tile_width = 64;
 150                 exec->tile_height = 64;
 151         }
 152
 153         if (exec->args->bin_cl_size != 0) {
 154                 ret = vc4_get_bcl(dev, exec);
 155                 if (ret)
 156                         goto fail;
 157         } else {
 158                 exec->ct0ca = exec->ct0ea = 0;
 159         }
 160
 161         ret = vc4_get_rcl(dev, exec);
 162         if (ret)
 163                 goto fail;
 164
 165 fail:
 166         return ret;
 167 }
 168
 169 #endif /* USE_VC4_SIMULATOR */