/* Make the test not meaningless when asserts are disabled. */
#undef NDEBUG

#include <assert.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>

#include <amdgpu.h>
#include "drm-uapi/amdgpu_drm.h"
#include "drm-uapi/drm_fourcc.h"

#include "ac_surface.h"
#include "util/macros.h"
#include "util/u_math.h"
#include "util/u_vector.h"
#include "util/mesa-sha1.h"
#include "addrlib/inc/addrinterface.h"

#include "ac_surface_test_common.h"

/*
 * The main goal of this test is making sure that we do
 * not change the meaning of existing modifiers.
 */

struct test_entry {
   /* key part */
   uint64_t modifier;
   unsigned w;
   unsigned h;
   enum pipe_format format;

   /* debug info */
   const char *name;
   uint8_t pipes;
   uint8_t rb;
   uint8_t banks_or_pkrs;
   uint8_t se;

   /* value to determine uniqueness */
   unsigned char hash[20];

   /* u_vector requires power of two sizing */
   char padding[sizeof(void*) == 8 ? 8 : 16];
};

static uint64_t
block_count(unsigned w, unsigned h, unsigned elem_bits, unsigned block_bits,
            unsigned *aligned_pitch, unsigned *aligned_height)
{
   unsigned align_bits = block_bits - elem_bits;
   unsigned w_align = 1 << (align_bits / 2 + align_bits % 2);
   unsigned h_align = 1 << (align_bits / 2);

   w = align(w, w_align);
   h = align(h, h_align);

   if (aligned_pitch)
      *aligned_pitch = w;

   if (aligned_height)
      *aligned_height = h;
   return ((uint64_t)w * h) >> align_bits;
}


static ADDR2_COMPUTE_DCC_ADDRFROMCOORD_INPUT
get_addr_from_coord_base(ADDR_HANDLE addrlib, const struct radeon_surf *surf,
                         unsigned w, unsigned h, enum pipe_format format,
                         bool rb_aligned, bool pipe_aligned)
{
   ADDR2_COMPUTE_DCCINFO_INPUT din = {0};
   ADDR2_COMPUTE_DCCINFO_OUTPUT dout = {0};
   din.size = sizeof(ADDR2_COMPUTE_DCCINFO_INPUT);
   dout.size = sizeof(ADDR2_COMPUTE_DCCINFO_OUTPUT);

   din.swizzleMode = surf->u.gfx9.swizzle_mode;
   din.resourceType = ADDR_RSRC_TEX_2D;
   din.bpp = util_format_get_blocksizebits(format);
   din.unalignedWidth = w;
   din.unalignedHeight = h;
   din.numSlices = 1;
   din.numMipLevels = 1;
   din.numFrags = 1;
   din.dccKeyFlags.pipeAligned = surf->u.gfx9.color.dcc.pipe_aligned;
   din.dccKeyFlags.rbAligned = surf->u.gfx9.color.dcc.rb_aligned;
   din.dataSurfaceSize = surf->surf_size;

   ADDR_E_RETURNCODE ret = Addr2ComputeDccInfo(addrlib, &din, &dout);
   assert(ret == ADDR_OK);

   ADDR2_COMPUTE_DCC_ADDRFROMCOORD_INPUT dcc_input = {0};
   dcc_input.size = sizeof(dcc_input);
   dcc_input.swizzleMode = surf->u.gfx9.swizzle_mode;
   dcc_input.resourceType = ADDR_RSRC_TEX_2D;
   dcc_input.bpp = din.bpp;
   dcc_input.numSlices = 1;
   dcc_input.numMipLevels = 1;
   dcc_input.numFrags = 1;
   dcc_input.dccKeyFlags.pipeAligned = pipe_aligned;
   dcc_input.dccKeyFlags.rbAligned = rb_aligned;
   dcc_input.pitch = dout.pitch;
   dcc_input.height = dout.height;
   dcc_input.compressBlkWidth = dout.compressBlkWidth;
   dcc_input.compressBlkHeight = dout.compressBlkHeight;
   dcc_input.compressBlkDepth = dout.compressBlkDepth;
   dcc_input.metaBlkWidth     = dout.metaBlkWidth;
   dcc_input.metaBlkHeight    = dout.metaBlkHeight;
   dcc_input.metaBlkDepth     = dout.metaBlkDepth;
   return dcc_input;
}

static
void generate_hash(struct ac_addrlib *ac_addrlib,
                   struct test_entry *entry,
                   const struct radeon_surf *surf)
{
   ADDR_HANDLE addrlib = ac_addrlib_get_handle(ac_addrlib);

   srandom(53);
   struct mesa_sha1 ctx;
   _mesa_sha1_init(&ctx);

   _mesa_sha1_update(&ctx, &surf->total_size, sizeof(surf->total_size));
   _mesa_sha1_update(&ctx, &surf->meta_offset, sizeof(surf->meta_offset));
   _mesa_sha1_update(&ctx, &surf->display_dcc_offset, sizeof(surf->display_dcc_offset));
   _mesa_sha1_update(&ctx, &surf->u.gfx9.color.display_dcc_pitch_max,
                     sizeof(surf->u.gfx9.color.display_dcc_pitch_max));

   ADDR2_COMPUTE_SURFACE_ADDRFROMCOORD_INPUT input = {0};
   input.size = sizeof(input);
   input.swizzleMode = surf->u.gfx9.swizzle_mode;
   input.resourceType = ADDR_RSRC_TEX_2D;
   input.bpp = util_format_get_blocksizebits(entry->format);
   input.unalignedWidth = entry->w;
   input.unalignedHeight = entry->h;
   input.numSlices = 1;
   input.numMipLevels = 1;
   input.numSamples = 1;
   input.numFrags = 1;
   input.pitchInElement = surf->u.gfx9.surf_pitch;

   ADDR2_COMPUTE_DCC_ADDRFROMCOORD_INPUT dcc_input = {0};
   if (surf->meta_offset) {
      dcc_input = get_addr_from_coord_base(addrlib, surf, entry->w,
                                           entry->h, entry->format,
                                           surf->u.gfx9.color.dcc.rb_aligned,
                                           surf->u.gfx9.color.dcc.pipe_aligned);
   }

   ADDR2_COMPUTE_DCC_ADDRFROMCOORD_INPUT display_dcc_input = {0};
   if (surf->display_dcc_offset) {
      display_dcc_input = get_addr_from_coord_base(addrlib, surf, entry->w,
                                                   entry->h, entry->format,
                                                   false, false);
   }

   for (unsigned i = 0; i < 1000; ++i) {
      int32_t x, y;
      x = random();
      y = random();

      input.x = (x & INT_MAX) % entry->w;
      input.y = (y & INT_MAX) % entry->h;

      ADDR2_COMPUTE_SURFACE_ADDRFROMCOORD_OUTPUT output = {0};
      output.size = sizeof(output);

      ADDR_E_RETURNCODE ret = Addr2ComputeSurfaceAddrFromCoord(addrlib, &input, &output);
      assert(ret == ADDR_OK);

      _mesa_sha1_update(&ctx, &output.addr, sizeof(output.addr));

      if (surf->meta_offset) {
         dcc_input.x = (x & INT_MAX) % entry->w;
         dcc_input.y = (y & INT_MAX) % entry->h;

         ADDR2_COMPUTE_DCC_ADDRFROMCOORD_OUTPUT dcc_output = {0};
         dcc_output.size = sizeof(dcc_output);

         ret = Addr2ComputeDccAddrFromCoord(addrlib, &dcc_input, &dcc_output);
         assert(ret == ADDR_OK);

         _mesa_sha1_update(&ctx, &dcc_output.addr, sizeof(dcc_output.addr));
      }

      if (surf->display_dcc_offset) {
         display_dcc_input.x = (x & INT_MAX) % entry->w;
         display_dcc_input.y = (y & INT_MAX) % entry->h;

         ADDR2_COMPUTE_DCC_ADDRFROMCOORD_OUTPUT dcc_output = {0};
         dcc_output.size = sizeof(dcc_output);

         ret = Addr2ComputeDccAddrFromCoord(addrlib, &display_dcc_input, &dcc_output);
         assert(ret == ADDR_OK);

         _mesa_sha1_update(&ctx, &dcc_output.addr, sizeof(dcc_output.addr));
      }
   }

   _mesa_sha1_final(&ctx, entry->hash);
}

static void test_modifier(const struct radeon_info *info,
           const char *name,
                          struct ac_addrlib *addrlib,
                          uint64_t modifier,
           enum pipe_format format,
                          struct u_vector *test_entries)
{
   unsigned elem_bits = util_logbase2(util_format_get_blocksize(format));
   const unsigned dims[][2] = {
      {1, 1},
      {1920, 1080},
      {1366, 768},
      {3840, 2160},
      {233, 938},
   };
   for (unsigned i = 0; i < ARRAY_SIZE(dims); ++i) {
      struct ac_surf_config config = (struct ac_surf_config) {
         .info = (struct ac_surf_info) {
            .width = dims[i][0],
            .height = dims[i][1],
            .depth = 1,
            .samples = 1,
            .storage_samples = 1,
            .levels = 1,
            .num_channels = 3,
            .array_size = 1
         },
      };

      struct test_entry entry = {
         .modifier = modifier,
         .w = config.info.width,
         .h = config.info.height,
         .format = format,
         .name = name,
         .pipes = G_0098F8_NUM_PIPES(info->gb_addr_config),
         .rb = G_0098F8_NUM_RB_PER_SE(info->gb_addr_config) +
               G_0098F8_NUM_SHADER_ENGINES_GFX9(info->gb_addr_config),
         .se = G_0098F8_NUM_SHADER_ENGINES_GFX9(info->gb_addr_config),
         .banks_or_pkrs = info->gfx_level >= GFX10 ?
            G_0098F8_NUM_PKRS(info->gb_addr_config) : G_0098F8_NUM_BANKS(info->gb_addr_config)
      };

      struct radeon_surf surf = (struct radeon_surf) {
         .blk_w = 1,
         .blk_h = 1,
         .bpe = util_format_get_blocksize(format),
         .modifier = modifier,
      };

      int r = ac_compute_surface(addrlib, info, &config, RADEON_SURF_MODE_2D, &surf);
      assert(!r);

      assert(surf.cmask_offset == 0);
      assert(surf.fmask_offset == 0);

      unsigned block_size_bits = surf.u.gfx9.swizzle_mode >= ADDR_SW_256KB_Z_X ? 18 : 16;

      uint64_t surf_size;
      unsigned aligned_pitch, aligned_height;
      if (modifier != DRM_FORMAT_MOD_LINEAR) {
         surf_size = block_count(dims[i][0], dims[i][1],
                  elem_bits, block_size_bits, &aligned_pitch,
                  &aligned_height) << block_size_bits;
      } else {
         aligned_pitch = align(dims[i][0], 256 / util_format_get_blocksize(format));
         aligned_height = dims[i][1];
         surf_size = align(dims[i][0] * util_format_get_blocksize(format), 256) * dims[i][1];
      }


      assert(surf.u.gfx9.surf_pitch == aligned_pitch);
      assert(surf.u.gfx9.surf_height == aligned_height);
      assert(surf.surf_size == surf_size);
      uint64_t expected_offset = surf_size;

      if (ac_modifier_has_dcc_retile(modifier)) {
         unsigned dcc_align = info->gfx_level >= GFX10 ? 4096 : 65536;
         unsigned dcc_pitch;
         uint64_t dcc_size = block_count(dims[i][0], dims[i][1],
                     elem_bits, 20, &dcc_pitch,
                     NULL) << 12;

         assert(surf.u.gfx9.color.display_dcc_size == align(dcc_size, dcc_align));
         assert(surf.u.gfx9.color.display_dcc_pitch_max + 1 == dcc_pitch);
         assert(surf.display_dcc_offset == expected_offset);

         expected_offset += align(dcc_size, dcc_align);
      } else
         assert(!surf.display_dcc_offset);

      if (ac_modifier_has_dcc(modifier)) {
         uint64_t dcc_align = 1;
         unsigned block_bits;
         if (info->gfx_level >= GFX10) {
            unsigned num_pipes = G_0098F8_NUM_PIPES(info->gb_addr_config);
            if (info->gfx_level >= GFX10_3 &&
                G_0098F8_NUM_PKRS(info->gb_addr_config) == num_pipes && num_pipes > 1)
               ++num_pipes;
            block_bits = 16 +
               num_pipes +
               G_0098F8_PIPE_INTERLEAVE_SIZE_GFX9(info->gb_addr_config);
            block_bits = MAX2(block_bits, 20);
            dcc_align = MAX2(4096, 256 <<
                                  (num_pipes +
                                   G_0098F8_PIPE_INTERLEAVE_SIZE_GFX9(info->gb_addr_config)));
         } else {
            block_bits = 18 +
               G_0098F8_NUM_RB_PER_SE(info->gb_addr_config) +
               G_0098F8_NUM_SHADER_ENGINES_GFX9(info->gb_addr_config);
            block_bits = MAX2(block_bits, 20);
            dcc_align = 65536;
         }

         expected_offset = align(expected_offset, dcc_align);
         assert(surf.meta_offset == expected_offset);

         uint64_t dcc_size = block_count(dims[i][0], dims[i][1],
                     elem_bits, block_bits,
                     NULL, NULL) << (block_bits - 8);
         dcc_size = align64(dcc_size, dcc_align);
         assert(surf.meta_size == dcc_size);

         expected_offset += dcc_size;
      } else
         assert(!surf.meta_offset);

      assert(surf.total_size == expected_offset);

      generate_hash(addrlib, &entry, &surf);
      *(struct test_entry*)u_vector_add(test_entries) = entry;
   }

}

static void run_modifier_test(struct u_vector *test_entries, const char *name,
                                  const struct radeon_info *info)
{
   struct ac_addrlib *addrlib = ac_addrlib_create(info, NULL);
   assert(addrlib);

   const struct ac_modifier_options options = {
      .dcc = true,
      .dcc_retile = true,
   };

   enum pipe_format formats[] = {
      PIPE_FORMAT_R8_UNORM,
      PIPE_FORMAT_R16_UNORM,
      PIPE_FORMAT_R32_FLOAT,
      PIPE_FORMAT_R32G32_FLOAT,
      PIPE_FORMAT_R32G32B32A32_FLOAT
   };
   for (unsigned j = 0; j < ARRAY_SIZE(formats); ++j) {
      unsigned mod_count = 0;
      ac_get_supported_modifiers(info, &options, formats[j], &mod_count, NULL);

      uint64_t *modifiers = malloc(sizeof(uint64_t) * mod_count);
      ac_get_supported_modifiers(info, &options, formats[j], &mod_count, modifiers);

      for (unsigned i = 0; i < mod_count; ++i) {
         test_modifier(info, name, addrlib, modifiers[i], formats[j], test_entries);
      }

      free(modifiers);
   }
   ac_addrlib_destroy(addrlib);
}

static int compare_test_entry(const void *a, const void *b)
{
   return memcmp(a, b, sizeof(struct test_entry));
}

static bool test_entry_key_equal(const struct test_entry *a, const struct test_entry *b)
{
   return a->modifier == b->modifier && a->w == b->w && a->h == b->h && a->format == b->format;
}

static bool test_entry_value_equal(const struct test_entry *a, const struct test_entry *b)
{
   if (memcmp(a->hash, b->hash, sizeof(a->hash)))
      return false;
   return true;
}

static void print_test_entry(const struct test_entry *e)
{
   printf("%.16" PRIx64 " %.4d %.4d %.2d %s %d %d %d %d\n", e->modifier, e->w, e->h,
          util_format_get_blocksize(e->format), e->name, e->pipes, e->rb, e->se, e->banks_or_pkrs);
}

int main()
{
   STATIC_ASSERT(sizeof(struct test_entry) == 64);

   struct u_vector test_entries;
   u_vector_init_pow2(&test_entries, 64, sizeof(struct test_entry));

   for (unsigned i = 0; i < ARRAY_SIZE(testcases); ++i) {
      struct radeon_info info = get_radeon_info(&testcases[i]);

      run_modifier_test(&test_entries, testcases[i].name, &info);
   }

   qsort(u_vector_tail(&test_entries),
         u_vector_length(&test_entries),
         sizeof(struct test_entry),
         compare_test_entry);

   struct test_entry *cur, *prev = NULL, *prevprev = NULL;
   bool mismatched_duplicates = false;
   u_vector_foreach(cur, &test_entries) {
      if (prev && test_entry_key_equal(cur, prev) &&
          !test_entry_value_equal(cur, prev)) {
         if (!prevprev || !test_entry_key_equal(prev, prevprev)) {
            print_test_entry(prev);
         }
         print_test_entry(cur);
         mismatched_duplicates = true;
      }
      prevprev = prev;
      prev = cur;
   }
   assert(!mismatched_duplicates);

   u_vector_finish(&test_entries);

   return 0;
}