/*
 * Copyright © 2011 Red Hat All Rights Reserved.
 * Copyright © 2014 Advanced Micro Devices, Inc.
 * All Rights Reserved.
 *
 * 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, sub license, 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 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
 * NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS, AUTHORS
 * AND/OR ITS SUPPLIERS 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.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 */

/* Contact:
 *     Marek Olšák <maraeo@gmail.com>
 */

#include "amdgpu_winsys.h"

#ifndef NO_ENTRIES
#define NO_ENTRIES 32
#endif

#ifndef NO_MACRO_ENTRIES
#define NO_MACRO_ENTRIES 16
#endif

#ifndef CIASICIDGFXENGINE_SOUTHERNISLAND
#define CIASICIDGFXENGINE_SOUTHERNISLAND 0x0000000A
#endif


static int amdgpu_surface_sanity(const struct radeon_surf *surf)
{
   unsigned type = RADEON_SURF_GET(surf->flags, TYPE);

   if (!(surf->flags & RADEON_SURF_HAS_TILE_MODE_INDEX))
      return -EINVAL;

   /* all dimension must be at least 1 ! */
   if (!surf->npix_x || !surf->npix_y || !surf->npix_z ||
       !surf->array_size)
      return -EINVAL;

   if (!surf->blk_w || !surf->blk_h || !surf->blk_d)
      return -EINVAL;

   switch (surf->nsamples) {
   case 1:
   case 2:
   case 4:
   case 8:
      break;
   default:
      return -EINVAL;
   }

   switch (type) {
   case RADEON_SURF_TYPE_1D:
      if (surf->npix_y > 1)
         return -EINVAL;
      /* fall through */
   case RADEON_SURF_TYPE_2D:
   case RADEON_SURF_TYPE_CUBEMAP:
      if (surf->npix_z > 1 || surf->array_size > 1)
         return -EINVAL;
      break;
   case RADEON_SURF_TYPE_3D:
      if (surf->array_size > 1)
         return -EINVAL;
      break;
   case RADEON_SURF_TYPE_1D_ARRAY:
      if (surf->npix_y > 1)
         return -EINVAL;
      /* fall through */
   case RADEON_SURF_TYPE_2D_ARRAY:
      if (surf->npix_z > 1)
         return -EINVAL;
      break;
   default:
      return -EINVAL;
   }
   return 0;
}

static void *ADDR_API allocSysMem(const ADDR_ALLOCSYSMEM_INPUT * pInput)
{
   return malloc(pInput->sizeInBytes);
}

static ADDR_E_RETURNCODE ADDR_API freeSysMem(const ADDR_FREESYSMEM_INPUT * pInput)
{
   free(pInput->pVirtAddr);
   return ADDR_OK;
}

/**
 * This returns the number of banks for the surface.
 * Possible values: 2, 4, 8, 16.
 */
static uint32_t cik_num_banks(struct amdgpu_winsys *ws,
                              struct radeon_surf *surf)
{
   unsigned index, tileb;

   tileb = 8 * 8 * surf->bpe;
   tileb = MIN2(surf->tile_split, tileb);

   for (index = 0; tileb > 64; index++) {
      tileb >>= 1;
   }
   assert(index < 16);

   return 2 << ((ws->amdinfo.gb_macro_tile_mode[index] >> 6) & 0x3);
}

ADDR_HANDLE amdgpu_addr_create(struct amdgpu_winsys *ws)
{
   ADDR_CREATE_INPUT addrCreateInput = {0};
   ADDR_CREATE_OUTPUT addrCreateOutput = {0};
   ADDR_REGISTER_VALUE regValue = {0};
   ADDR_CREATE_FLAGS createFlags = {{0}};
   ADDR_E_RETURNCODE addrRet;

   addrCreateInput.size = sizeof(ADDR_CREATE_INPUT);
   addrCreateOutput.size = sizeof(ADDR_CREATE_OUTPUT);

   regValue.noOfBanks = ws->amdinfo.mc_arb_ramcfg & 0x3;
   regValue.gbAddrConfig = ws->amdinfo.gb_addr_cfg;
   regValue.noOfRanks = (ws->amdinfo.mc_arb_ramcfg & 0x4) >> 2;

   regValue.backendDisables = ws->amdinfo.backend_disable[0];
   regValue.pTileConfig = ws->amdinfo.gb_tile_mode;
   regValue.noOfEntries = sizeof(ws->amdinfo.gb_tile_mode) /
                          sizeof(ws->amdinfo.gb_tile_mode[0]);
   regValue.pMacroTileConfig = ws->amdinfo.gb_macro_tile_mode;
   regValue.noOfMacroEntries = sizeof(ws->amdinfo.gb_macro_tile_mode) /
                               sizeof(ws->amdinfo.gb_macro_tile_mode[0]);

   createFlags.value = 0;
   createFlags.useTileIndex = 1;
   createFlags.degradeBaseLevel = 1;

   addrCreateInput.chipEngine = CIASICIDGFXENGINE_SOUTHERNISLAND;
   addrCreateInput.chipFamily = ws->family;
   addrCreateInput.chipRevision = ws->rev_id;
   addrCreateInput.createFlags = createFlags;
   addrCreateInput.callbacks.allocSysMem = allocSysMem;
   addrCreateInput.callbacks.freeSysMem = freeSysMem;
   addrCreateInput.callbacks.debugPrint = 0;
   addrCreateInput.regValue = regValue;

   addrRet = AddrCreate(&addrCreateInput, &addrCreateOutput);
   if (addrRet != ADDR_OK)
      return NULL;

   return addrCreateOutput.hLib;
}

static int compute_level(struct amdgpu_winsys *ws,
                         struct radeon_surf *surf, bool is_stencil,
                         unsigned level, unsigned type, bool compressed,
                         ADDR_COMPUTE_SURFACE_INFO_INPUT *AddrSurfInfoIn,
                         ADDR_COMPUTE_SURFACE_INFO_OUTPUT *AddrSurfInfoOut)
{
   struct radeon_surf_level *surf_level;
   ADDR_E_RETURNCODE ret;

   AddrSurfInfoIn->mipLevel = level;
   AddrSurfInfoIn->width = u_minify(surf->npix_x, level);
   AddrSurfInfoIn->height = u_minify(surf->npix_y, level);

   if (type == RADEON_SURF_TYPE_3D)
      AddrSurfInfoIn->numSlices = u_minify(surf->npix_z, level);
   else if (type == RADEON_SURF_TYPE_CUBEMAP)
      AddrSurfInfoIn->numSlices = 6;
   else
      AddrSurfInfoIn->numSlices = surf->array_size;

   if (level > 0) {
      /* Set the base level pitch. This is needed for calculation
       * of non-zero levels. */
      if (is_stencil)
         AddrSurfInfoIn->basePitch = surf->stencil_level[0].nblk_x;
      else
         AddrSurfInfoIn->basePitch = surf->level[0].nblk_x;

      /* Convert blocks to pixels for compressed formats. */
      if (compressed)
         AddrSurfInfoIn->basePitch *= surf->blk_w;
   }

   ret = AddrComputeSurfaceInfo(ws->addrlib,
                                AddrSurfInfoIn,
                                AddrSurfInfoOut);
   if (ret != ADDR_OK) {
      return ret;
   }

   surf_level = is_stencil ? &surf->stencil_level[level] : &surf->level[level];
   surf_level->offset = align(surf->bo_size, AddrSurfInfoOut->baseAlign);
   surf_level->slice_size = AddrSurfInfoOut->sliceSize;
   surf_level->pitch_bytes = AddrSurfInfoOut->pitch * (is_stencil ? 1 : surf->bpe);
   surf_level->npix_x = u_minify(surf->npix_x, level);
   surf_level->npix_y = u_minify(surf->npix_y, level);
   surf_level->npix_z = u_minify(surf->npix_z, level);
   surf_level->nblk_x = AddrSurfInfoOut->pitch;
   surf_level->nblk_y = AddrSurfInfoOut->height;
   if (type == RADEON_SURF_TYPE_3D)
      surf_level->nblk_z = AddrSurfInfoOut->depth;
   else
      surf_level->nblk_z = 1;

   switch (AddrSurfInfoOut->tileMode) {
   case ADDR_TM_LINEAR_GENERAL:
      surf_level->mode = RADEON_SURF_MODE_LINEAR;
      break;
   case ADDR_TM_LINEAR_ALIGNED:
      surf_level->mode = RADEON_SURF_MODE_LINEAR_ALIGNED;
      break;
   case ADDR_TM_1D_TILED_THIN1:
      surf_level->mode = RADEON_SURF_MODE_1D;
      break;
   case ADDR_TM_2D_TILED_THIN1:
      surf_level->mode = RADEON_SURF_MODE_2D;
      break;
   default:
      assert(0);
   }

   if (is_stencil)
      surf->stencil_tiling_index[level] = AddrSurfInfoOut->tileIndex;
   else
      surf->tiling_index[level] = AddrSurfInfoOut->tileIndex;

   surf->bo_size = surf_level->offset + AddrSurfInfoOut->surfSize;
   return 0;
}

static int amdgpu_surface_init(struct radeon_winsys *rws,
                               struct radeon_surf *surf)
{
   struct amdgpu_winsys *ws = (struct amdgpu_winsys*)rws;
   unsigned level, mode, type;
   bool compressed;
   ADDR_COMPUTE_SURFACE_INFO_INPUT AddrSurfInfoIn = {0};
   ADDR_COMPUTE_SURFACE_INFO_OUTPUT AddrSurfInfoOut = {0};
   ADDR_TILEINFO AddrTileInfoIn = {0};
   ADDR_TILEINFO AddrTileInfoOut = {0};
   int r;

   r = amdgpu_surface_sanity(surf);
   if (r)
      return r;

   AddrSurfInfoIn.size = sizeof(ADDR_COMPUTE_SURFACE_INFO_INPUT);
   AddrSurfInfoOut.size = sizeof(ADDR_COMPUTE_SURFACE_INFO_OUTPUT);
   AddrSurfInfoOut.pTileInfo = &AddrTileInfoOut;

   type = RADEON_SURF_GET(surf->flags, TYPE);
   mode = RADEON_SURF_GET(surf->flags, MODE);
   compressed = surf->blk_w == 4 && surf->blk_h == 4;

   /* MSAA and FMASK require 2D tiling. */
   if (surf->nsamples > 1 ||
       (surf->flags & RADEON_SURF_FMASK))
      mode = RADEON_SURF_MODE_2D;

   /* DB doesn't support linear layouts. */
   if (surf->flags & (RADEON_SURF_Z_OR_SBUFFER) &&
       mode < RADEON_SURF_MODE_1D)
      mode = RADEON_SURF_MODE_1D;

   /* Set the requested tiling mode. */
   switch (mode) {
   case RADEON_SURF_MODE_LINEAR:
      AddrSurfInfoIn.tileMode = ADDR_TM_LINEAR_GENERAL;
      break;
   case RADEON_SURF_MODE_LINEAR_ALIGNED:
      AddrSurfInfoIn.tileMode = ADDR_TM_LINEAR_ALIGNED;
      break;
   case RADEON_SURF_MODE_1D:
      AddrSurfInfoIn.tileMode = ADDR_TM_1D_TILED_THIN1;
      break;
   case RADEON_SURF_MODE_2D:
      AddrSurfInfoIn.tileMode = ADDR_TM_2D_TILED_THIN1;
      break;
   default:
      assert(0);
   }

   /* The format must be set correctly for the allocation of compressed
    * textures to work. In other cases, setting the bpp is sufficient. */
   if (compressed) {
      switch (surf->bpe) {
      case 8:
         AddrSurfInfoIn.format = ADDR_FMT_BC1;
         break;
      case 16:
         AddrSurfInfoIn.format = ADDR_FMT_BC3;
         break;
      default:
         assert(0);
      }
   }
   else {
      AddrSurfInfoIn.bpp = surf->bpe * 8;
   }

   AddrSurfInfoIn.numSamples = surf->nsamples;
   AddrSurfInfoIn.tileIndex = -1;

   /* Set the micro tile type. */
   if (surf->flags & RADEON_SURF_SCANOUT)
      AddrSurfInfoIn.tileType = ADDR_DISPLAYABLE;
   else if (surf->flags & RADEON_SURF_Z_OR_SBUFFER)
      AddrSurfInfoIn.tileType = ADDR_DEPTH_SAMPLE_ORDER;
   else
      AddrSurfInfoIn.tileType = ADDR_NON_DISPLAYABLE;

   AddrSurfInfoIn.flags.color = !(surf->flags & RADEON_SURF_Z_OR_SBUFFER);
   AddrSurfInfoIn.flags.depth = (surf->flags & RADEON_SURF_ZBUFFER) != 0;
   AddrSurfInfoIn.flags.stencil = (surf->flags & RADEON_SURF_SBUFFER) != 0;
   AddrSurfInfoIn.flags.cube = type == RADEON_SURF_TYPE_CUBEMAP;
   AddrSurfInfoIn.flags.display = (surf->flags & RADEON_SURF_SCANOUT) != 0;
   AddrSurfInfoIn.flags.pow2Pad = surf->last_level > 0;
   AddrSurfInfoIn.flags.degrade4Space = 1;

   /* This disables incorrect calculations (hacks) in addrlib. */
   AddrSurfInfoIn.flags.noStencil = 1;

   /* Set preferred macrotile parameters. This is usually required
    * for shared resources. This is for 2D tiling only. */
   if (AddrSurfInfoIn.tileMode >= ADDR_TM_2D_TILED_THIN1 &&
       surf->bankw && surf->bankh && surf->mtilea && surf->tile_split) {
      /* If any of these parameters are incorrect, the calculation
       * will fail. */
      AddrTileInfoIn.banks = cik_num_banks(ws, surf);
      AddrTileInfoIn.bankWidth = surf->bankw;
      AddrTileInfoIn.bankHeight = surf->bankh;
      AddrTileInfoIn.macroAspectRatio = surf->mtilea;
      AddrTileInfoIn.tileSplitBytes = surf->tile_split;
      AddrSurfInfoIn.flags.degrade4Space = 0;
      AddrSurfInfoIn.pTileInfo = &AddrTileInfoIn;

      /* If AddrSurfInfoIn.pTileInfo is set, Addrlib doesn't set
       * the tile index, because we are expected to know it if
       * we know the other parameters.
       *
       * This is something that can easily be fixed in Addrlib.
       * For now, just figure it out here.
       * Note that only 2D_TILE_THIN1 is handled here.
       */
      assert(!(surf->flags & RADEON_SURF_Z_OR_SBUFFER));
      assert(AddrSurfInfoIn.tileMode == ADDR_TM_2D_TILED_THIN1);

      if (AddrSurfInfoIn.tileType == ADDR_DISPLAYABLE)
         AddrSurfInfoIn.tileIndex = 10; /* 2D displayable */
      else
         AddrSurfInfoIn.tileIndex = 14; /* 2D non-displayable */
   }

   surf->bo_size = 0;

   /* Calculate texture layout information. */
   for (level = 0; level <= surf->last_level; level++) {
      r = compute_level(ws, surf, false, level, type, compressed,
                        &AddrSurfInfoIn, &AddrSurfInfoOut);
      if (r)
         return r;

      if (level == 0) {
         surf->bo_alignment = AddrSurfInfoOut.baseAlign;
         surf->pipe_config = AddrSurfInfoOut.pTileInfo->pipeConfig - 1;

         /* For 2D modes only. */
         if (AddrSurfInfoOut.tileMode >= ADDR_TM_2D_TILED_THIN1) {
            surf->bankw = AddrSurfInfoOut.pTileInfo->bankWidth;
            surf->bankh = AddrSurfInfoOut.pTileInfo->bankHeight;
            surf->mtilea = AddrSurfInfoOut.pTileInfo->macroAspectRatio;
            surf->tile_split = AddrSurfInfoOut.pTileInfo->tileSplitBytes;
            surf->num_banks = AddrSurfInfoOut.pTileInfo->banks;
         }
      }
   }

   /* Calculate texture layout information for stencil. */
   if (surf->flags & RADEON_SURF_SBUFFER) {
      AddrSurfInfoIn.bpp = 8;
      /* This will be ignored if AddrSurfInfoIn.pTileInfo is NULL. */
      AddrTileInfoIn.tileSplitBytes = surf->stencil_tile_split;

      for (level = 0; level <= surf->last_level; level++) {
         r = compute_level(ws, surf, true, level, type, compressed,
                           &AddrSurfInfoIn, &AddrSurfInfoOut);
         if (r)
            return r;

         if (level == 0) {
            surf->stencil_offset = surf->stencil_level[0].offset;

            /* For 2D modes only. */
            if (AddrSurfInfoOut.tileMode >= ADDR_TM_2D_TILED_THIN1) {
               surf->stencil_tile_split =
                     AddrSurfInfoOut.pTileInfo->tileSplitBytes;
            }
         }
      }
   }

   return 0;
}

static int amdgpu_surface_best(struct radeon_winsys *rws,
                               struct radeon_surf *surf)
{
   return 0;
}

void amdgpu_surface_init_functions(struct amdgpu_winsys *ws)
{
   ws->base.surface_init = amdgpu_surface_init;
   ws->base.surface_best = amdgpu_surface_best;
}