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  1. /*
  2.  * Copyright © 2014 Intel Corporation
  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.  * Authors:
  24.  *    Mika Kuoppala <mika.kuoppala@intel.com>
  25.  *
  26.  */
  27.  
  28. #include "i915_drv.h"
  29. #include "intel_renderstate.h"
  30.  
  31. static const struct intel_renderstate_rodata *
  32. render_state_get_rodata(struct drm_device *dev, const int gen)
  33. {
  34.         switch (gen) {
  35.         case 6:
  36.                 return &gen6_null_state;
  37.         case 7:
  38.                 return &gen7_null_state;
  39.         case 8:
  40.                 return &gen8_null_state;
  41.         case 9:
  42.                 return &gen9_null_state;
  43.         }
  44.  
  45.         return NULL;
  46. }
  47.  
  48. static int render_state_init(struct render_state *so, struct drm_device *dev)
  49. {
  50.         int ret;
  51.  
  52.         so->gen = INTEL_INFO(dev)->gen;
  53.         so->rodata = render_state_get_rodata(dev, so->gen);
  54.         if (so->rodata == NULL)
  55.                 return 0;
  56.  
  57.         if (so->rodata->batch_items * 4 > 4096)
  58.                 return -EINVAL;
  59.  
  60.         so->obj = i915_gem_alloc_object(dev, 4096);
  61.         if (so->obj == NULL)
  62.                 return -ENOMEM;
  63.  
  64.         ret = i915_gem_obj_ggtt_pin(so->obj, 4096, 0);
  65.         if (ret)
  66.                 goto free_gem;
  67.  
  68.         so->ggtt_offset = i915_gem_obj_ggtt_offset(so->obj);
  69.         return 0;
  70.  
  71. free_gem:
  72.         drm_gem_object_unreference(&so->obj->base);
  73.         return ret;
  74. }
  75.  
  76. static int render_state_setup(struct render_state *so)
  77. {
  78.         const struct intel_renderstate_rodata *rodata = so->rodata;
  79.         unsigned int i = 0, reloc_index = 0;
  80.         struct page *page;
  81.         u32 *d;
  82.         int ret;
  83.  
  84.         ret = i915_gem_object_set_to_cpu_domain(so->obj, true);
  85.         if (ret)
  86.                 return ret;
  87.  
  88.         page = sg_page(so->obj->pages->sgl);
  89.         d = kmap(page);
  90.  
  91.         while (i < rodata->batch_items) {
  92.                 u32 s = rodata->batch[i];
  93.  
  94.                 if (i * 4  == rodata->reloc[reloc_index]) {
  95.                         u64 r = s + so->ggtt_offset;
  96.                         s = lower_32_bits(r);
  97.                         if (so->gen >= 8) {
  98.                                 if (i + 1 >= rodata->batch_items ||
  99.                                     rodata->batch[i + 1] != 0)
  100.                                         return -EINVAL;
  101.  
  102.                                 d[i++] = s;
  103.                                 s = upper_32_bits(r);
  104.                         }
  105.  
  106.                         reloc_index++;
  107.                 }
  108.  
  109.                 d[i++] = s;
  110.         }
  111.         kunmap(page);
  112.  
  113.         ret = i915_gem_object_set_to_gtt_domain(so->obj, false);
  114.         if (ret)
  115.                 return ret;
  116.  
  117.         if (rodata->reloc[reloc_index] != -1) {
  118.                 DRM_ERROR("only %d relocs resolved\n", reloc_index);
  119.                 return -EINVAL;
  120.         }
  121.  
  122.         return 0;
  123. }
  124.  
  125. void i915_gem_render_state_fini(struct render_state *so)
  126. {
  127.         i915_gem_object_ggtt_unpin(so->obj);
  128.         drm_gem_object_unreference(&so->obj->base);
  129. }
  130.  
  131. int i915_gem_render_state_prepare(struct intel_engine_cs *ring,
  132.                                   struct render_state *so)
  133. {
  134.         int ret;
  135.  
  136.         if (WARN_ON(ring->id != RCS))
  137.                 return -ENOENT;
  138.  
  139.         ret = render_state_init(so, ring->dev);
  140.         if (ret)
  141.                 return ret;
  142.  
  143.         if (so->rodata == NULL)
  144.                 return 0;
  145.  
  146.         ret = render_state_setup(so);
  147.         if (ret) {
  148.                 i915_gem_render_state_fini(so);
  149.                 return ret;
  150.         }
  151.  
  152.                 return 0;
  153. }
  154.  
  155. int i915_gem_render_state_init(struct intel_engine_cs *ring)
  156. {
  157.         struct render_state so;
  158.         int ret;
  159.  
  160.         ret = i915_gem_render_state_prepare(ring, &so);
  161.         if (ret)
  162.                 return ret;
  163.  
  164.         if (so.rodata == NULL)
  165.                 return 0;
  166.  
  167.         ret = ring->dispatch_execbuffer(ring,
  168.                                         so.ggtt_offset,
  169.                                         so.rodata->batch_items * 4,
  170.                                         I915_DISPATCH_SECURE);
  171.         if (ret)
  172.                 goto out;
  173.  
  174.         i915_vma_move_to_active(i915_gem_obj_to_ggtt(so.obj), ring);
  175.  
  176.         ret = __i915_add_request(ring, NULL, so.obj, NULL);
  177.         /* __i915_add_request moves object to inactive if it fails */
  178. out:
  179.         i915_gem_render_state_fini(&so);
  180.         return ret;
  181. }
  182.