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/*

 * Copyright 2012 Red Hat Inc.

 *

 * 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.

 *

 * Authors: Ben Skeggs

 *

 */

#include "tgsi/tgsi_parse.h"

#include "nouveau/nv_object.xml.h"

#include "nv30-40_3d.xml.h"

#include "nv30_context.h"

#include "nvfx_shader.h"

static void

nv30_fragprog_upload(struct nv30_context *nv30)

{

   struct nouveau_context *nv = &nv30->base;

   struct nv30_fragprog *fp = nv30->fragprog.program;

   struct pipe_context *pipe = &nv30->base.pipe;

   struct pipe_transfer *transfer;

   uint32_t *map;

   int i; (void)i;

   if (unlikely(!fp->buffer)) {

      fp->buffer = pipe_buffer_create(pipe->screen, 0, 0, fp->insn_len * 4);

   }

   map = pipe_buffer_map(pipe, fp->buffer, PIPE_TRANSFER_WRITE, &transfer);

#ifndef PIPE_ARCH_BIG_ENDIAN

   memcpy(map, fp->insn, fp->insn_len * 4);

#else

   for (i = 0; i < fp->insn_len; i++)

      *map++ = (fp->insn[i] >> 16) | (fp->insn[i] << 16);

#endif

   pipe_buffer_unmap(pipe, transfer);

   if (nv04_resource(fp->buffer)->domain != NOUVEAU_BO_VRAM)

      nouveau_buffer_migrate(nv, nv04_resource(fp->buffer), NOUVEAU_BO_VRAM);

}

void

nv30_fragprog_validate(struct nv30_context *nv30)

{

   struct nouveau_pushbuf *push = nv30->base.pushbuf;

   struct nouveau_object *eng3d = nv30->screen->eng3d;

   struct nv30_fragprog *fp = nv30->fragprog.program;

   boolean upload = FALSE;

   int i;

   if (!fp->translated) {

      _nvfx_fragprog_translate(nv30, fp, FALSE);

      if (!fp->translated)

         return;

      upload = TRUE;

   }

   /* update constants, also needs to be done on every fp switch as we

    * have no idea whether the constbuf changed in the meantime

    */

   if (nv30->fragprog.constbuf) {

      struct pipe_resource *constbuf = nv30->fragprog.constbuf;

      uint32_t *cbuf = (uint32_t *)nv04_resource(constbuf)->data;

      for (i = 0; i < fp->nr_consts; i++) {

         unsigned off = fp->consts[i].offset;

         unsigned idx = fp->consts[i].index * 4;

         if (!memcmp(&fp->insn[off], &cbuf[idx], 4 * 4))

            continue;

         memcpy(&fp->insn[off], &cbuf[idx], 4 * 4);

         upload = TRUE;

      }

   }

   if (upload)

      nv30_fragprog_upload(nv30);

   /* FP_ACTIVE_PROGRAM needs to be done again even if only the consts

    * were updated.  TEX_CACHE_CTL magic is not enough to convince the

    * GPU that it should re-read the fragprog from VRAM... sigh.

    */

   if (nv30->state.fragprog != fp || upload) {

      struct nv04_resource *r = nv04_resource(fp->buffer);

      if (!PUSH_SPACE(push, 8))

         return;

      PUSH_RESET(push, BUFCTX_FRAGPROG);

      BEGIN_NV04(push, NV30_3D(FP_ACTIVE_PROGRAM), 1);

      PUSH_RESRC(push, NV30_3D(FP_ACTIVE_PROGRAM), BUFCTX_FRAGPROG, r, 0,

                       NOUVEAU_BO_LOW | NOUVEAU_BO_RD | NOUVEAU_BO_OR,

                       NV30_3D_FP_ACTIVE_PROGRAM_DMA0,

                       NV30_3D_FP_ACTIVE_PROGRAM_DMA1);

      BEGIN_NV04(push, NV30_3D(FP_CONTROL), 1);

      PUSH_DATA (push, fp->fp_control);

      if (eng3d->oclass < NV40_3D_CLASS) {

         BEGIN_NV04(push, NV30_3D(FP_REG_CONTROL), 1);

         PUSH_DATA (push, 0x00010004);

         BEGIN_NV04(push, NV30_3D(TEX_UNITS_ENABLE), 1);

         PUSH_DATA (push, fp->texcoords);

      } else {

         BEGIN_NV04(push, SUBC_3D(0x0b40), 1);

         PUSH_DATA (push, 0x00000000);

      }

      nv30->state.fragprog = fp;

   }

}

static void *

nv30_fp_state_create(struct pipe_context *pipe,

                     const struct pipe_shader_state *cso)

{

   struct nv30_fragprog *fp = CALLOC_STRUCT(nv30_fragprog);

   if (!fp)

      return NULL;

   fp->pipe.tokens = tgsi_dup_tokens(cso->tokens);

   tgsi_scan_shader(fp->pipe.tokens, &fp->info);

   return fp;

}

static void

nv30_fp_state_delete(struct pipe_context *pipe, void *hwcso)

{

   struct nv30_fragprog *fp = hwcso;

   pipe_resource_reference(&fp->buffer, NULL);

   FREE((void *)fp->pipe.tokens);

   FREE(fp->insn);

   FREE(fp);

}

static void

nv30_fp_state_bind(struct pipe_context *pipe, void *hwcso)

{

   struct nv30_context *nv30 = nv30_context(pipe);

   nv30->fragprog.program = hwcso;

   nv30->dirty |= NV30_NEW_FRAGPROG;

}

void

nv30_fragprog_init(struct pipe_context *pipe)

{

   pipe->create_fs_state = nv30_fp_state_create;

   pipe->bind_fs_state = nv30_fp_state_bind;

   pipe->delete_fs_state = nv30_fp_state_delete;

}