text: /*
   * Copyright © 2014-2017 Broadcom
   * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the next
   * paragraph) shall be included in all copies or substantial portions of the
   * Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
   * IN THE SOFTWARE.
   */
  
  #include <sys/sysinfo.h>
  
  #include "common/v3d_device_info.h"
  #include "common/v3d_limits.h"
  #include "util/os_misc.h"
  #include "pipe/p_defines.h"
  #include "pipe/p_screen.h"
  #include "pipe/p_state.h"
  
  #include "util/u_debug.h"
  #include "util/u_memory.h"
  #include "util/format/u_format.h"
  #include "util/u_hash_table.h"
  #include "util/u_screen.h"
  #include "util/u_transfer_helper.h"
  #include "util/ralloc.h"
  #include "util/xmlconfig.h"
  
  #include <xf86drm.h>
  #include "v3d_screen.h"
  #include "v3d_context.h"
  #include "v3d_resource.h"
  #include "compiler/v3d_compiler.h"
  #include "drm-uapi/drm_fourcc.h"
  
  static const char *
  v3d_screen_get_name(struct pipe_screen *pscreen)
  {
          struct v3d_screen *screen = v3d_screen(pscreen);
  
          if (!screen->name) {
                  screen->name = ralloc_asprintf(screen,
                                                 "V3D %d.%d",
                                                 screen->devinfo.ver / 10,
                                                 screen->devinfo.ver % 10);
          }
  
          return screen->name;
  }
  
  static const char *
  v3d_screen_get_vendor(struct pipe_screen *pscreen)
  {
          return "Broadcom";
  }
  
  static void
  v3d_screen_destroy(struct pipe_screen *pscreen)
  {
          struct v3d_screen *screen = v3d_screen(pscreen);
  
          _mesa_hash_table_destroy(screen->bo_handles, NULL);
          v3d_bufmgr_destroy(pscreen);
          slab_destroy_parent(&screen->transfer_pool);
          free(screen->ro);
  
          if (using_v3d_simulator)
                  v3d_simulator_destroy(screen->sim_file);
  
          v3d_compiler_free(screen->compiler);
          u_transfer_helper_destroy(pscreen->transfer_helper);
  
          close(screen->fd);
          ralloc_free(pscreen);
  }
  
  static bool
  v3d_has_feature(struct v3d_screen *screen, enum drm_v3d_param feature)
  {
          struct drm_v3d_get_param p = {
                  .param = feature,
          };
          int ret = v3d_ioctl(screen->fd, DRM_IOCTL_V3D_GET_PARAM, &p);
  
          if (ret != 0)
                  return false;
  
          return p.value;
  }
  
  static int
  v3d_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
  {
          struct v3d_screen *screen = v3d_screen(pscreen);
  
          switch (param) {
                  /* Supported features (boolean caps). */
          case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
          case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
          case PIPE_CAP_NPOT_TEXTURES:
          case PIPE_CAP_BLEND_EQUATION_SEPARATE:
          case PIPE_CAP_TEXTURE_MULTISAMPLE:
          case PIPE_CAP_TEXTURE_SWIZZLE:
          case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
          case PIPE_CAP_START_INSTANCE:
          case PIPE_CAP_TGSI_INSTANCEID:
          case PIPE_CAP_FRAGMENT_SHADER_TEXTURE_LOD:
          case PIPE_CAP_FRAGMENT_SHADER_DERIVATIVES:
          case PIPE_CAP_VERTEX_SHADER_SATURATE:
          case PIPE_CAP_PRIMITIVE_RESTART_FIXED_INDEX:
          case PIPE_CAP_OCCLUSION_QUERY:
          case PIPE_CAP_POINT_SPRITE:
          case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
          case PIPE_CAP_DRAW_INDIRECT:
          case PIPE_CAP_MULTI_DRAW_INDIRECT:
          case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
          case PIPE_CAP_SIGNED_VERTEX_BUFFER_OFFSET:
          case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
          case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
          case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
          case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
          case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
          case PIPE_CAP_TGSI_TEXCOORD:
                  return 1;
  
          case PIPE_CAP_TEXTURE_QUERY_LOD:
                  return screen->devinfo.ver >= 42;
                  break;
  
          case PIPE_CAP_PACKED_UNIFORMS:
                  /* We can't enable this flag, because it results in load_ubo
                   * intrinsics across a 16b boundary, but v3d's TMU general
                   * memory accesses wrap on 16b boundaries.
                   */
                  return 0;
  
          case PIPE_CAP_NIR_IMAGES_AS_DEREF:
                  return 0;
  
          case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
                  /* XXX perf: we don't want to emit these extra blits for
                   * glReadPixels(), since we still have to do an uncached read
                   * from the GPU of the result after waiting for the TFU blit
                   * to happen.  However, disabling this introduces instability
                   * in
                   * dEQP-GLES31.functional.image_load_store.early_fragment_tests.*
                   * and corruption in chromium's rendering.
                   */
                  return 1;
  
          case PIPE_CAP_COMPUTE:
                  return screen->has_csd && screen->devinfo.ver >= 41;
  
          case PIPE_CAP_GENERATE_MIPMAP:
                  return v3d_has_feature(screen, DRM_V3D_PARAM_SUPPORTS_TFU);
  
          case PIPE_CAP_INDEP_BLEND_ENABLE:
                  return screen->devinfo.ver >= 40;
  
          case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
                  return 256;
  
          case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
                  if (screen->devinfo.ver < 40)
                          return 0;
                  return 4;
  
          case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
                  if (screen->has_cache_flush)
                          return 4;
                  else
                          return 0; /* Disables shader storage */
  
          case PIPE_CAP_GLSL_FEATURE_LEVEL:
                  return 330;
  
          case PIPE_CAP_ESSL_FEATURE_LEVEL:
                  return 310;
  
  	case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
  		return 140;
  
          case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
                  return 1;
          case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
                  return 0;
          case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
                  if (screen->devinfo.ver >= 40)
                          return 0;
                  else
                          return 1;
          case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
                  if (screen->devinfo.ver >= 40)
                          return 1;
                  else
                          return 0;
  
          case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
          case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
          case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
                  return 1;
  
          case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
                  return 4;
  
          case PIPE_CAP_MAX_VARYINGS:
                  return V3D_MAX_FS_INPUTS / 4;
  
                  /* Texturing. */
          case PIPE_CAP_MAX_TEXTURE_2D_SIZE:
                  if (screen->devinfo.ver < 40)
                          return 2048;
                  else if (screen->nonmsaa_texture_size_limit)
                          return 7680;
                  else
                          return 4096;
          case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
          case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
                  if (screen->devinfo.ver < 40)
                          return 12;
                  else
                          return V3D_MAX_MIP_LEVELS;
          case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
                  return 2048;
  
                  /* Render targets. */
          case PIPE_CAP_MAX_RENDER_TARGETS:
                  return 4;
  
          case PIPE_CAP_VENDOR_ID:
                  return 0x14E4;
          case PIPE_CAP_ACCELERATED:
                  return 1;
          case PIPE_CAP_VIDEO_MEMORY: {
                  uint64_t system_memory;
  
                  if (!os_get_total_physical_memory(&system_memory))
                          return 0;
  
                  return (int)(system_memory >> 20);
          }
          case PIPE_CAP_UMA:
                  return 1;
  
          case PIPE_CAP_ALPHA_TEST:
          case PIPE_CAP_FLATSHADE:
          case PIPE_CAP_TWO_SIDED_COLOR:
          case PIPE_CAP_VERTEX_COLOR_CLAMPED:
          case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
                  return 0;
  
          /* Geometry shaders */
          case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
                  /* Minimum required by GLES 3.2 */
                  return 1024;
          case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
                  /* MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS / 4 */
                  return 256;
          case PIPE_CAP_MAX_GS_INVOCATIONS:
                  return 32;
  
          default:
                  return u_pipe_screen_get_param_defaults(pscreen, param);
          }
  }
  
  static float
  v3d_screen_get_paramf(struct pipe_screen *pscreen, enum pipe_capf param)
  {
          switch (param) {
          case PIPE_CAPF_MAX_LINE_WIDTH:
          case PIPE_CAPF_MAX_LINE_WIDTH_AA:
                  return V3D_MAX_LINE_WIDTH;
  
          case PIPE_CAPF_MAX_POINT_WIDTH:
          case PIPE_CAPF_MAX_POINT_WIDTH_AA:
                  return V3D_MAX_POINT_SIZE;
  
          case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
                  return 0.0f;
          case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
                  return 16.0f;
  
          case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
          case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
          case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
                  return 0.0f;
          default:
                  fprintf(stderr, "unknown paramf %d\n", param);
                  return 0;
          }
  }
  
  static int
  v3d_screen_get_shader_param(struct pipe_screen *pscreen, unsigned shader,
                             enum pipe_shader_cap param)
  {
          struct v3d_screen *screen = v3d_screen(pscreen);
  
          switch (shader) {
          case PIPE_SHADER_VERTEX:
          case PIPE_SHADER_FRAGMENT:
                  break;
          case PIPE_SHADER_COMPUTE:
                  if (!screen->has_csd)
                          return 0;
                  break;
          case PIPE_SHADER_GEOMETRY:
                  if (screen->devinfo.ver < 41)
                          return 0;
                  break;
          default:
                  return 0;
          }
  
          /* this is probably not totally correct.. but it's a start: */
          switch (param) {
          case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
          case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
          case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
          case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
                  return 16384;
  
          case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
                  return UINT_MAX;
  
          case PIPE_SHADER_CAP_MAX_INPUTS:
                  switch (shader) {
                  case PIPE_SHADER_VERTEX:
                          return V3D_MAX_VS_INPUTS / 4;
                  case PIPE_SHADER_GEOMETRY:
                          return V3D_MAX_GS_INPUTS / 4;
                  case PIPE_SHADER_FRAGMENT:
                          return V3D_MAX_FS_INPUTS / 4;
                  default:
                          return 0;
                  };
          case PIPE_SHADER_CAP_MAX_OUTPUTS:
                  if (shader == PIPE_SHADER_FRAGMENT)
                          return 4;
                  else
                          return V3D_MAX_FS_INPUTS / 4;
          case PIPE_SHADER_CAP_MAX_TEMPS:
                  return 256; /* GL_MAX_PROGRAM_TEMPORARIES_ARB */
          case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
                  /* Note: Limited by the offset size in
                   * v3d_unit_data_create().
                   */
                  return 16 * 1024 * sizeof(float);
          case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
                  return 16;
          case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
                  return 0;
          case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
                  return 1;
          case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
                  return 0;
          case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
                  return 1;
          case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
                  return 1;
          case PIPE_SHADER_CAP_SUBROUTINES:
                  return 0;
          case PIPE_SHADER_CAP_INTEGERS:
                  return 1;
          case PIPE_SHADER_CAP_FP16:
          case PIPE_SHADER_CAP_FP16_DERIVATIVES:
          case PIPE_SHADER_CAP_INT16:
          case PIPE_SHADER_CAP_GLSL_16BIT_CONSTS:
          case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
          case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
          case PIPE_SHADER_CAP_TGSI_LDEXP_SUPPORTED:
          case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
          case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
          case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
          case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS:
          case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTER_BUFFERS:
                  return 0;
          case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
          case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
                  return V3D_OPENGL_MAX_TEXTURE_SAMPLERS;
  
          case PIPE_SHADER_CAP_MAX_SHADER_BUFFERS:
                  if (screen->has_cache_flush) {
                          if (shader == PIPE_SHADER_VERTEX ||
                              shader == PIPE_SHADER_GEOMETRY) {
                                  return 0;
                          }
                          return PIPE_MAX_SHADER_BUFFERS;
                   } else {
                          return 0;
                   }
  
          case PIPE_SHADER_CAP_MAX_SHADER_IMAGES:
                  if (screen->has_cache_flush) {
                          if (screen->devinfo.ver < 41)
                                  return 0;
                          else
                                  return PIPE_MAX_SHADER_IMAGES;
                  } else {
                          return 0;
                  }
  
          case PIPE_SHADER_CAP_PREFERRED_IR:
                  return PIPE_SHADER_IR_NIR;
          case PIPE_SHADER_CAP_SUPPORTED_IRS:
                  return 1 << PIPE_SHADER_IR_NIR;
          case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
                  return 32;
          case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
          case PIPE_SHADER_CAP_TGSI_SKIP_MERGE_REGISTERS:
                  return 0;
          default:
                  fprintf(stderr, "unknown shader param %d\n", param);
                  return 0;
          }
          return 0;
  }
  
  static int
  v3d_get_compute_param(struct pipe_screen *pscreen, enum pipe_shader_ir ir_type,
                        enum pipe_compute_cap param, void *ret)
  {
          struct v3d_screen *screen = v3d_screen(pscreen);
  
          if (!screen->has_csd)
                  return 0;
  
  #define RET(x) do {                                     \
                  if (ret)                                \
                          memcpy(ret, x, sizeof(x));      \
                  return sizeof(x);                       \
          } while (0)
  
          switch (param) {
          case PIPE_COMPUTE_CAP_ADDRESS_BITS:
                  RET((uint32_t []) { 32 });
                  break;
  
          case PIPE_COMPUTE_CAP_IR_TARGET:
                  sprintf(ret, "v3d");
                  return strlen(ret);
  
          case PIPE_COMPUTE_CAP_GRID_DIMENSION:
                  RET((uint64_t []) { 3 });
  
          case PIPE_COMPUTE_CAP_MAX_GRID_SIZE:
                  /* GL_MAX_COMPUTE_SHADER_WORK_GROUP_COUNT: The CSD has a
                   * 16-bit field for the number of workgroups in each
                   * dimension.
                   */
                  RET(((uint64_t []) { 65535, 65535, 65535 }));
  
          case PIPE_COMPUTE_CAP_MAX_BLOCK_SIZE:
                  /* GL_MAX_COMPUTE_WORK_GROUP_SIZE */
                  RET(((uint64_t []) { 256, 256, 256 }));
  
          case PIPE_COMPUTE_CAP_MAX_THREADS_PER_BLOCK:
          case PIPE_COMPUTE_CAP_MAX_VARIABLE_THREADS_PER_BLOCK:
                  /* GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS: This is
                   * limited by WG_SIZE in the CSD.
                   */
                  RET((uint64_t []) { 256 });
  
          case PIPE_COMPUTE_CAP_MAX_GLOBAL_SIZE:
                  RET((uint64_t []) { 1024 * 1024 * 1024 });
  
          case PIPE_COMPUTE_CAP_MAX_LOCAL_SIZE:
                  /* GL_MAX_COMPUTE_SHARED_MEMORY_SIZE */
                  RET((uint64_t []) { 32768 });
  
          case PIPE_COMPUTE_CAP_MAX_PRIVATE_SIZE:
          case PIPE_COMPUTE_CAP_MAX_INPUT_SIZE:
                  RET((uint64_t []) { 4096 });
  
          case PIPE_COMPUTE_CAP_MAX_MEM_ALLOC_SIZE: {
                  struct sysinfo si;
                  sysinfo(&si);
                  RET((uint64_t []) { si.totalram });
          }
  
          case PIPE_COMPUTE_CAP_MAX_CLOCK_FREQUENCY:
                  /* OpenCL only */
                  RET((uint32_t []) { 0 });
  
          case PIPE_COMPUTE_CAP_MAX_COMPUTE_UNITS:
                  RET((uint32_t []) { 1 });
  
          case PIPE_COMPUTE_CAP_IMAGES_SUPPORTED:
                  RET((uint32_t []) { 1 });
  
          case PIPE_COMPUTE_CAP_SUBGROUP_SIZE:
                  RET((uint32_t []) { 16 });
  
          }
  
          return 0;
  }
  
  static bool
  v3d_screen_is_format_supported(struct pipe_screen *pscreen,
                                 enum pipe_format format,
                                 enum pipe_texture_target target,
                                 unsigned sample_count,
                                 unsigned storage_sample_count,
                                 unsigned usage)
  {
          struct v3d_screen *screen = v3d_screen(pscreen);
  
          if (MAX2(1, sample_count) != MAX2(1, storage_sample_count))
                  return false;
  
          if (sample_count > 1 && sample_count != V3D_MAX_SAMPLES)
                  return false;
  
          if (target >= PIPE_MAX_TEXTURE_TYPES) {
                  return false;
          }
  
          if (usage & PIPE_BIND_VERTEX_BUFFER) {
                  switch (format) {
                  case PIPE_FORMAT_R32G32B32A32_FLOAT:
                  case PIPE_FORMAT_R32G32B32_FLOAT:
                  case PIPE_FORMAT_R32G32_FLOAT:
                  case PIPE_FORMAT_R32_FLOAT:
                  case PIPE_FORMAT_R32G32B32A32_SNORM:
                  case PIPE_FORMAT_R32G32B32_SNORM:
                  case PIPE_FORMAT_R32G32_SNORM:
                  case PIPE_FORMAT_R32_SNORM:
                  case PIPE_FORMAT_R32G32B32A32_SSCALED:
                  case PIPE_FORMAT_R32G32B32_SSCALED:
                  case PIPE_FORMAT_R32G32_SSCALED:
                  case PIPE_FORMAT_R32_SSCALED:
                  case PIPE_FORMAT_R16G16B16A16_UNORM:
                  case PIPE_FORMAT_R16G16B16_UNORM:
                  case PIPE_FORMAT_R16G16_UNORM:
                  case PIPE_FORMAT_R16_UNORM:
                  case PIPE_FORMAT_R16G16B16A16_SNORM:
                  case PIPE_FORMAT_R16G16B16_SNORM:
                  case PIPE_FORMAT_R16G16_SNORM:
                  case PIPE_FORMAT_R16_SNORM:
                  case PIPE_FORMAT_R16G16B16A16_USCALED:
                  case PIPE_FORMAT_R16G16B16_USCALED:
                  case PIPE_FORMAT_R16G16_USCALED:
                  case PIPE_FORMAT_R16_USCALED:
                  case PIPE_FORMAT_R16G16B16A16_SSCALED:
                  case PIPE_FORMAT_R16G16B16_SSCALED:
                  case PIPE_FORMAT_R16G16_SSCALED:
                  case PIPE_FORMAT_R16_SSCALED:
                  case PIPE_FORMAT_B8G8R8A8_UNORM:
                  case PIPE_FORMAT_R8G8B8A8_UNORM:
                  case PIPE_FORMAT_R8G8B8_UNORM:
                  case PIPE_FORMAT_R8G8_UNORM:
                  case PIPE_FORMAT_R8_UNORM:
                  case PIPE_FORMAT_R8G8B8A8_SNORM:
                  case PIPE_FORMAT_R8G8B8_SNORM:
                  case PIPE_FORMAT_R8G8_SNORM:
                  case PIPE_FORMAT_R8_SNORM:
                  case PIPE_FORMAT_R8G8B8A8_USCALED:
                  case PIPE_FORMAT_R8G8B8_USCALED:
                  case PIPE_FORMAT_R8G8_USCALED:
                  case PIPE_FORMAT_R8_USCALED:
                  case PIPE_FORMAT_R8G8B8A8_SSCALED:
                  case PIPE_FORMAT_R8G8B8_SSCALED:
                  case PIPE_FORMAT_R8G8_SSCALED:
                  case PIPE_FORMAT_R8_SSCALED:
                  case PIPE_FORMAT_R10G10B10A2_UNORM:
                  case PIPE_FORMAT_B10G10R10A2_UNORM:
                  case PIPE_FORMAT_R10G10B10A2_SNORM:
                  case PIPE_FORMAT_B10G10R10A2_SNORM:
                  case PIPE_FORMAT_R10G10B10A2_USCALED:
                  case PIPE_FORMAT_B10G10R10A2_USCALED:
                  case PIPE_FORMAT_R10G10B10A2_SSCALED:
                  case PIPE_FORMAT_B10G10R10A2_SSCALED:
                          break;
                  default:
                          return false;
                  }
          }
  
          /* FORMAT_NONE gets allowed for ARB_framebuffer_no_attachments's probe
           * of FRAMEBUFFER_MAX_SAMPLES
           */
          if ((usage & PIPE_BIND_RENDER_TARGET) &&
              format != PIPE_FORMAT_NONE &&
              !v3d_rt_format_supported(&screen->devinfo, format)) {
                  return false;
          }
  
          if ((usage & PIPE_BIND_SAMPLER_VIEW) &&
              !v3d_tex_format_supported(&screen->devinfo, format)) {
                  return false;
          }
  
          if ((usage & PIPE_BIND_DEPTH_STENCIL) &&
              !(format == PIPE_FORMAT_S8_UINT_Z24_UNORM ||
                format == PIPE_FORMAT_X8Z24_UNORM ||
                format == PIPE_FORMAT_Z16_UNORM ||
                format == PIPE_FORMAT_Z32_FLOAT ||
                format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT)) {
                  return false;
          }
  
          if ((usage & PIPE_BIND_INDEX_BUFFER) &&
              !(format == PIPE_FORMAT_I8_UINT ||
                format == PIPE_FORMAT_I16_UINT ||
                format == PIPE_FORMAT_I32_UINT)) {
                  return false;
          }
  
          return true;
  }
  
  static const void *
  v3d_screen_get_compiler_options(struct pipe_screen *pscreen,
                                  enum pipe_shader_ir ir, unsigned shader)
  {
          return &v3d_nir_options;
  }
  
  static const uint64_t v3d_available_modifiers[] = {
     DRM_FORMAT_MOD_BROADCOM_UIF,
     DRM_FORMAT_MOD_LINEAR,
  };
  
  static void
  v3d_screen_query_dmabuf_modifiers(struct pipe_screen *pscreen,
                                    enum pipe_format format, int max,
                                    uint64_t *modifiers,
                                    unsigned int *external_only,
                                    int *count)
  {
          int i;
          int num_modifiers = ARRAY_SIZE(v3d_available_modifiers);
  
          if (!modifiers) {
                  *count = num_modifiers;
                  return;
          }
  
          *count = MIN2(max, num_modifiers);
          for (i = 0; i < *count; i++) {
                  modifiers[i] = v3d_available_modifiers[i];
                  if (external_only)
                          external_only[i] = false;
         }
  }
  
  static bool
  v3d_screen_is_dmabuf_modifier_supported(struct pipe_screen *pscreen,
                                          uint64_t modifier,
                                          enum pipe_format format,
                                          bool *external_only)
  {
          int i;
  
          for (i = 0; i < ARRAY_SIZE(v3d_available_modifiers); i++) {
                  if (v3d_available_modifiers[i] == modifier) {
                          if (external_only)
                                  *external_only = false;
  
                          return true;
                  }
          }
  
          return false;
  }
  
  struct pipe_screen *
  v3d_screen_create(int fd, const struct pipe_screen_config *config,
                    struct renderonly *ro)
  {
          struct v3d_screen *screen = rzalloc(NULL, struct v3d_screen);
          struct pipe_screen *pscreen;
  
          pscreen = &screen->base;
  
          pscreen->destroy = v3d_screen_destroy;
          pscreen->get_param = v3d_screen_get_param;
          pscreen->get_paramf = v3d_screen_get_paramf;
          pscreen->get_shader_param = v3d_screen_get_shader_param;
          pscreen->get_compute_param = v3d_get_compute_param;
          pscreen->context_create = v3d_context_create;
          pscreen->is_format_supported = v3d_screen_is_format_supported;
  
          screen->fd = fd;
          if (ro) {
                  screen->ro = renderonly_dup(ro);
                  if (!screen->ro) {
                          fprintf(stderr, "Failed to dup renderonly object\n");
                          ralloc_free(screen);
                          return NULL;
                  }
          }
          list_inithead(&screen->bo_cache.time_list);
          (void)mtx_init(&screen->bo_handles_mutex, mtx_plain);
          screen->bo_handles = util_hash_table_create_ptr_keys();
  
  #if defined(USE_V3D_SIMULATOR)
          screen->sim_file = v3d_simulator_init(screen->fd);
  #endif
  
          if (!v3d_get_device_info(screen->fd, &screen->devinfo, &v3d_ioctl))
                  goto fail;
  
          /* We have to driCheckOption for the simulator mode to not assertion
           * fail on not having our XML config.
           */
          const char *nonmsaa_name = "v3d_nonmsaa_texture_size_limit";
          screen->nonmsaa_texture_size_limit =
                  driCheckOption(config->options, nonmsaa_name, DRI_BOOL) &&
                  driQueryOptionb(config->options, nonmsaa_name);
  
          slab_create_parent(&screen->transfer_pool, sizeof(struct v3d_transfer), 16);
  
          screen->has_csd = v3d_has_feature(screen, DRM_V3D_PARAM_SUPPORTS_CSD);
          screen->has_cache_flush =
                  v3d_has_feature(screen, DRM_V3D_PARAM_SUPPORTS_CACHE_FLUSH);
  
          v3d_fence_init(screen);
  
          v3d_process_debug_variable();
  
          v3d_resource_screen_init(pscreen);
  
          screen->compiler = v3d_compiler_init(&screen->devinfo);
  
          pscreen->get_name = v3d_screen_get_name;
          pscreen->get_vendor = v3d_screen_get_vendor;
          pscreen->get_device_vendor = v3d_screen_get_vendor;
          pscreen->get_compiler_options = v3d_screen_get_compiler_options;
          pscreen->query_dmabuf_modifiers = v3d_screen_query_dmabuf_modifiers;
          pscreen->is_dmabuf_modifier_supported =
                  v3d_screen_is_dmabuf_modifier_supported;
  
          return pscreen;
  
  fail:
          close(fd);
          ralloc_free(pscreen);
          return NULL;
  }
  