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/*

 * Copyright 2008 Ben Skeggs

 *

 * 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 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 "pipe/p_state.h"

#include "pipe/p_defines.h"

#include "util/u_inlines.h"

#include "util/u_format.h"

#include "nv50_context.h"

#include "nv50_resource.h"

uint32_t

nv50_tex_choose_tile_dims_helper(unsigned nx, unsigned ny, unsigned nz)

{

   uint32_t tile_mode = 0x000;

   if (ny > 64) tile_mode = 0x040; /* height 128 tiles */

   else

   if (ny > 32) tile_mode = 0x030; /* height 64 tiles */

   else

   if (ny > 16) tile_mode = 0x020; /* height 32 tiles */

   else

   if (ny >  8) tile_mode = 0x010; /* height 16 tiles */

   if (nz == 1)

      return tile_mode;

   else

      if (tile_mode > 0x020)

         tile_mode = 0x020;

   if (nz > 16 && tile_mode < 0x020)

      return tile_mode | 0x500; /* depth 32 tiles */

   if (nz > 8) return tile_mode | 0x400; /* depth 16 tiles */

   if (nz > 4) return tile_mode | 0x300; /* depth 8 tiles */

   if (nz > 2) return tile_mode | 0x200; /* depth 4 tiles */

   return tile_mode | 0x100;

}

static uint32_t

nv50_tex_choose_tile_dims(unsigned nx, unsigned ny, unsigned nz)

{

   return nv50_tex_choose_tile_dims_helper(nx, ny * 2, nz);

}

static uint32_t

nv50_mt_choose_storage_type(struct nv50_miptree *mt, boolean compressed)

{

   const unsigned ms = mt->ms_x + mt->ms_y;

   uint32_t tile_flags;

   if (unlikely(mt->base.base.flags & NOUVEAU_RESOURCE_FLAG_LINEAR))

      return 0;

   if (unlikely(mt->base.base.bind & PIPE_BIND_CURSOR))

      return 0;

   switch (mt->base.base.format) {

   case PIPE_FORMAT_Z16_UNORM:

      tile_flags = 0x6c + ms;

      break;

   case PIPE_FORMAT_S8_UINT_Z24_UNORM:

      tile_flags = 0x18 + ms;

      break;

   case PIPE_FORMAT_Z24X8_UNORM:

   case PIPE_FORMAT_Z24_UNORM_S8_UINT:

      tile_flags = 0x128 + ms;

      break;

   case PIPE_FORMAT_Z32_FLOAT:

      tile_flags = 0x40 + ms;

      break;

   case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:

      tile_flags = 0x60 + ms;

      break;

   default:

      switch (util_format_get_blocksizebits(mt->base.base.format)) {

      case 128:

         assert(ms < 3);

         tile_flags = 0x74;

         break;

      case 64:

         switch (ms) {

         case 2: tile_flags = 0xfc; break;

         case 3: tile_flags = 0xfd; break;

         default:

            tile_flags = 0x70;

            break;

         }

         break;

      case 32:

         if (mt->base.base.bind & PIPE_BIND_SCANOUT) {

            assert(ms == 0);

            tile_flags = 0x7a;

         } else {

            switch (ms) {

            case 2: tile_flags = 0xf8; break;

            case 3: tile_flags = 0xf9; break;

            default:

               tile_flags = 0x70;

               break;

            }

         }

         break;

      case 16:

      case 8:

         tile_flags = 0x70;

         break;

      default:

         return 0;

      }

      if (mt->base.base.bind & PIPE_BIND_CURSOR)

         tile_flags = 0;

   }

   if (!compressed)

      tile_flags &= ~0x180;

   return tile_flags;

}

void

nv50_miptree_destroy(struct pipe_screen *pscreen, struct pipe_resource *pt)

{

   struct nv50_miptree *mt = nv50_miptree(pt);

   nouveau_bo_ref(NULL, &mt->base.bo);

   nouveau_fence_ref(NULL, &mt->base.fence);

   nouveau_fence_ref(NULL, &mt->base.fence_wr);

   NOUVEAU_DRV_STAT(nouveau_screen(pscreen), tex_obj_current_count, -1);

   NOUVEAU_DRV_STAT(nouveau_screen(pscreen), tex_obj_current_bytes,

                    -(uint64_t)mt->total_size);

   FREE(mt);

}

boolean

nv50_miptree_get_handle(struct pipe_screen *pscreen,

                        struct pipe_resource *pt,

                        struct winsys_handle *whandle)

{

   struct nv50_miptree *mt = nv50_miptree(pt);

   unsigned stride;

   if (!mt || !mt->base.bo)

      return FALSE;

   stride = mt->level[0].pitch;

   return nouveau_screen_bo_get_handle(pscreen,

                                       mt->base.bo,

                                       stride,

                                       whandle);

}

const struct u_resource_vtbl nv50_miptree_vtbl =

{

   nv50_miptree_get_handle,         /* get_handle */

   nv50_miptree_destroy,            /* resource_destroy */

   nv50_miptree_transfer_map,       /* transfer_map */

   u_default_transfer_flush_region, /* transfer_flush_region */

   nv50_miptree_transfer_unmap,     /* transfer_unmap */

   u_default_transfer_inline_write  /* transfer_inline_write */

};

static INLINE boolean

nv50_miptree_init_ms_mode(struct nv50_miptree *mt)

{

   switch (mt->base.base.nr_samples) {

   case 8:

      mt->ms_mode = NV50_3D_MULTISAMPLE_MODE_MS8;

      mt->ms_x = 2;

      mt->ms_y = 1;

      break;

   case 4:

      mt->ms_mode = NV50_3D_MULTISAMPLE_MODE_MS4;

      mt->ms_x = 1;

      mt->ms_y = 1;

      break;

   case 2:

      mt->ms_mode = NV50_3D_MULTISAMPLE_MODE_MS2;

      mt->ms_x = 1;

      break;

   case 1:

   case 0:

      mt->ms_mode = NV50_3D_MULTISAMPLE_MODE_MS1;

      break;

   default:

      NOUVEAU_ERR("invalid nr_samples: %u\n", mt->base.base.nr_samples);

      return FALSE;

   }

   return TRUE;

}

boolean

nv50_miptree_init_layout_linear(struct nv50_miptree *mt, unsigned pitch_align)

{

   struct pipe_resource *pt = &mt->base.base;

   const unsigned blocksize = util_format_get_blocksize(pt->format);

   unsigned h = pt->height0;

   if (util_format_is_depth_or_stencil(pt->format))

      return FALSE;

   if ((pt->last_level > 0) || (pt->depth0 > 1) || (pt->array_size > 1))

      return FALSE;

   if (mt->ms_x | mt->ms_y)

      return FALSE;

   mt->level[0].pitch = align(pt->width0 * blocksize, pitch_align);

   /* Account for very generous prefetch (allocate size as if tiled). */

   h = MAX2(h, 8);

   h = util_next_power_of_two(h);

   mt->total_size = mt->level[0].pitch * h;

   return TRUE;

}

static void

nv50_miptree_init_layout_video(struct nv50_miptree *mt)

{

   const struct pipe_resource *pt = &mt->base.base;

   const unsigned blocksize = util_format_get_blocksize(pt->format);

   assert(pt->last_level == 0);

   assert(mt->ms_x == 0 && mt->ms_y == 0);

   assert(!util_format_is_compressed(pt->format));

   mt->layout_3d = pt->target == PIPE_TEXTURE_3D;

   mt->level[0].tile_mode = 0x20;

   mt->level[0].pitch = align(pt->width0 * blocksize, 64);

   mt->total_size = align(pt->height0, 16) * mt->level[0].pitch * (mt->layout_3d ? pt->depth0 : 1);

   if (pt->array_size > 1) {

      mt->layer_stride = align(mt->total_size, NV50_TILE_SIZE(0x20));

      mt->total_size = mt->layer_stride * pt->array_size;

   }

}

static void

nv50_miptree_init_layout_tiled(struct nv50_miptree *mt)

{

   struct pipe_resource *pt = &mt->base.base;

   unsigned w, h, d, l;

   const unsigned blocksize = util_format_get_blocksize(pt->format);

   mt->layout_3d = pt->target == PIPE_TEXTURE_3D;

   w = pt->width0 << mt->ms_x;

   h = pt->height0 << mt->ms_y;

   /* For 3D textures, a mipmap is spanned by all the layers, for array

    * textures and cube maps, each layer contains its own mipmaps.

    */

   d = mt->layout_3d ? pt->depth0 : 1;

   for (l = 0; l <= pt->last_level; ++l) {

      struct nv50_miptree_level *lvl = &mt->level[l];

      unsigned tsx, tsy, tsz;

      unsigned nbx = util_format_get_nblocksx(pt->format, w);

      unsigned nby = util_format_get_nblocksy(pt->format, h);

      lvl->offset = mt->total_size;

      lvl->tile_mode = nv50_tex_choose_tile_dims(nbx, nby, d);

      tsx = NV50_TILE_SIZE_X(lvl->tile_mode); /* x is tile row pitch in bytes */

      tsy = NV50_TILE_SIZE_Y(lvl->tile_mode);

      tsz = NV50_TILE_SIZE_Z(lvl->tile_mode);

      lvl->pitch = align(nbx * blocksize, tsx);

      mt->total_size += lvl->pitch * align(nby, tsy) * align(d, tsz);

      w = u_minify(w, 1);

      h = u_minify(h, 1);

      d = u_minify(d, 1);

   }

   if (pt->array_size > 1) {

      mt->layer_stride = align(mt->total_size,

                               NV50_TILE_SIZE(mt->level[0].tile_mode));

      mt->total_size = mt->layer_stride * pt->array_size;

   }

}

struct pipe_resource *

nv50_miptree_create(struct pipe_screen *pscreen,

                    const struct pipe_resource *templ)

{

   struct nouveau_device *dev = nouveau_screen(pscreen)->device;

   struct nv50_miptree *mt = CALLOC_STRUCT(nv50_miptree);

   struct pipe_resource *pt = &mt->base.base;

   int ret;

   union nouveau_bo_config bo_config;

   uint32_t bo_flags;

   if (!mt)

      return NULL;

   mt->base.vtbl = &nv50_miptree_vtbl;

   *pt = *templ;

   pipe_reference_init(&pt->reference, 1);

   pt->screen = pscreen;

   bo_config.nv50.memtype = nv50_mt_choose_storage_type(mt, TRUE);

   if (!nv50_miptree_init_ms_mode(mt)) {

      FREE(mt);

      return NULL;

   }

   if (unlikely(pt->flags & NV50_RESOURCE_FLAG_VIDEO)) {

      nv50_miptree_init_layout_video(mt);

      /* BO allocation done by client */

      return pt;

   } else

   if (bo_config.nv50.memtype != 0) {

      nv50_miptree_init_layout_tiled(mt);

   } else

   if (!nv50_miptree_init_layout_linear(mt, 64)) {

      FREE(mt);

      return NULL;

   }

   bo_config.nv50.tile_mode = mt->level[0].tile_mode;

   bo_flags = NOUVEAU_BO_VRAM | NOUVEAU_BO_NOSNOOP;

   if (mt->base.base.bind & (PIPE_BIND_CURSOR | PIPE_BIND_DISPLAY_TARGET))

      bo_flags |= NOUVEAU_BO_CONTIG;

   ret = nouveau_bo_new(dev, bo_flags, 4096, mt->total_size, &bo_config,

                        &mt->base.bo);

   if (ret) {

      FREE(mt);

      return NULL;

   }

   mt->base.domain = NOUVEAU_BO_VRAM;

   mt->base.address = mt->base.bo->offset;

   return pt;

}

struct pipe_resource *

nv50_miptree_from_handle(struct pipe_screen *pscreen,

                         const struct pipe_resource *templ,

                         struct winsys_handle *whandle)

{

   struct nv50_miptree *mt;

   unsigned stride;

   /* only supports 2D, non-mipmapped textures for the moment */

   if ((templ->target != PIPE_TEXTURE_2D &&

        templ->target != PIPE_TEXTURE_RECT) ||

       templ->last_level != 0 ||

       templ->depth0 != 1 ||

       templ->array_size > 1)

      return NULL;

   mt = CALLOC_STRUCT(nv50_miptree);

   if (!mt)

      return NULL;

   mt->base.bo = nouveau_screen_bo_from_handle(pscreen, whandle, &stride);

   if (mt->base.bo == NULL) {

      FREE(mt);

      return NULL;

   }

   mt->base.domain = NOUVEAU_BO_VRAM;

   mt->base.address = mt->base.bo->offset;

   mt->base.base = *templ;

   mt->base.vtbl = &nv50_miptree_vtbl;

   pipe_reference_init(&mt->base.base.reference, 1);

   mt->base.base.screen = pscreen;

   mt->level[0].pitch = stride;

   mt->level[0].offset = 0;

   mt->level[0].tile_mode = mt->base.bo->config.nv50.tile_mode;

   /* no need to adjust bo reference count */

   return &mt->base.base;

}

/* Offset of zslice @z from start of level @l. */

INLINE unsigned

nv50_mt_zslice_offset(const struct nv50_miptree *mt, unsigned l, unsigned z)

{

   const struct pipe_resource *pt = &mt->base.base;

   unsigned tds = NV50_TILE_SHIFT_Z(mt->level[l].tile_mode);

   unsigned ths = NV50_TILE_SHIFT_Y(mt->level[l].tile_mode);

   unsigned nby = util_format_get_nblocksy(pt->format,

                                           u_minify(pt->height0, l));

   /* to next 2D tile slice within a 3D tile */

   unsigned stride_2d = NV50_TILE_SIZE_2D(mt->level[l].tile_mode);

   /* to slice in the next (in z direction) 3D tile */

   unsigned stride_3d = (align(nby, (1 << ths)) * mt->level[l].pitch) << tds;

   return (z & ((1 << tds) - 1)) * stride_2d + (z >> tds) * stride_3d;

}

/* Surface functions.

 */

struct nv50_surface *

nv50_surface_from_miptree(struct nv50_miptree *mt,

                          const struct pipe_surface *templ)

{

   struct pipe_surface *ps;

   struct nv50_surface *ns = CALLOC_STRUCT(nv50_surface);

   if (!ns)

      return NULL;

   ps = &ns->base;

   pipe_reference_init(&ps->reference, 1);

   pipe_resource_reference(&ps->texture, &mt->base.base);

   ps->format = templ->format;

   ps->writable = templ->writable;

   ps->u.tex.level = templ->u.tex.level;

   ps->u.tex.first_layer = templ->u.tex.first_layer;

   ps->u.tex.last_layer = templ->u.tex.last_layer;

   ns->width = u_minify(mt->base.base.width0, ps->u.tex.level);

   ns->height = u_minify(mt->base.base.height0, ps->u.tex.level);

   ns->depth = ps->u.tex.last_layer - ps->u.tex.first_layer + 1;

   ns->offset = mt->level[templ->u.tex.level].offset;

   /* comment says there are going to be removed, but they're used by the st */

   ps->width = ns->width;

   ps->height = ns->height;

   ns->width <<= mt->ms_x;

   ns->height <<= mt->ms_y;

   return ns;

}

struct pipe_surface *

nv50_miptree_surface_new(struct pipe_context *pipe,

                         struct pipe_resource *pt,

                         const struct pipe_surface *templ)

{

   struct nv50_miptree *mt = nv50_miptree(pt);

   struct nv50_surface *ns = nv50_surface_from_miptree(mt, templ);

   if (!ns)

      return NULL;

   ns->base.context = pipe;

   if (ns->base.u.tex.first_layer) {

      const unsigned l = ns->base.u.tex.level;

      const unsigned z = ns->base.u.tex.first_layer;

      if (mt->layout_3d) {

         ns->offset += nv50_mt_zslice_offset(mt, l, z);

         /* TODO: switch to depth 1 tiles; but actually this shouldn't happen */

         if (ns->depth > 1 &&

             (z & (NV50_TILE_SIZE_Z(mt->level[l].tile_mode) - 1)))

            NOUVEAU_ERR("Creating unsupported 3D surface !\n");

      } else {

         ns->offset += mt->layer_stride * z;

      }

   }

   return &ns->base;

}