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Member "mesa-20.1.8/src/gallium/drivers/vc4/kernel/vc4_gem.c" (16 Sep 2020, 4813 Bytes) of package /linux/misc/mesa-20.1.8.tar.xz:


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    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 */