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  1. /**********************************************************
  2.  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
  3.  *
  4.  * Permission is hereby granted, free of charge, to any person
  5.  * obtaining a copy of this software and associated documentation
  6.  * files (the "Software"), to deal in the Software without
  7.  * restriction, including without limitation the rights to use, copy,
  8.  * modify, merge, publish, distribute, sublicense, and/or sell copies
  9.  * of the Software, and to permit persons to whom the Software is
  10.  * furnished to do so, subject to the following conditions:
  11.  *
  12.  * The above copyright notice and this permission notice shall be
  13.  * included in all copies or substantial portions of the Software.
  14.  *
  15.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16.  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18.  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19.  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20.  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21.  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22.  * SOFTWARE.
  23.  *
  24.  **********************************************************/
  25.  
  26. #include "util/u_inlines.h"
  27. #include "util/u_memory.h"
  28. #include "pipe/p_defines.h"
  29.  
  30. #include "svga_screen.h"
  31. #include "svga_context.h"
  32. #include "svga_state.h"
  33. #include "svga_cmd.h"
  34. #include "svga_tgsi.h"
  35. #include "svga_debug.h"
  36. #include "svga_resource_buffer.h"
  37.  
  38. #include "svga_hw_reg.h"
  39.  
  40.  
  41. /*
  42.  * Don't try to send more than 4kb of successive constants.
  43.  */
  44. #define MAX_CONST_REG_COUNT 256  /**< number of float[4] constants */
  45.  
  46. /**
  47.  * Extra space for svga-specific VS/PS constants (such as texcoord
  48.  * scale factors, vertex transformation scale/translation).
  49.  */
  50. #define MAX_EXTRA_CONSTS 32
  51.  
  52. /** Guest-backed surface constant buffers must be this size */
  53. #define GB_CONSTBUF_SIZE (SVGA3D_CONSTREG_MAX)
  54.  
  55. /**
  56.  * Convert from PIPE_SHADER_* to SVGA3D_SHADERTYPE_*
  57.  */
  58. static unsigned
  59. svga_shader_type(unsigned shader)
  60. {
  61.    switch (shader) {
  62.    case PIPE_SHADER_VERTEX:
  63.       return SVGA3D_SHADERTYPE_VS;
  64.    case PIPE_SHADER_FRAGMENT:
  65.       return SVGA3D_SHADERTYPE_PS;
  66.    default:
  67.       assert(!"Unexpected shader type");
  68.       return SVGA3D_SHADERTYPE_VS;
  69.    }
  70. }
  71.  
  72.  
  73. /**
  74.  * Emit any extra fragment shader constants into the buffer pointed
  75.  * to by 'dest'.
  76.  * In particular, these would be the scaling factors needed for handling
  77.  * unnormalized texture coordinates for texture rectangles.
  78.  * \return number of float[4] constants put into the dest buffer
  79.  */
  80. static unsigned
  81. svga_get_extra_fs_constants(struct svga_context *svga, float *dest)
  82. {
  83.    const struct svga_shader_variant *variant = svga->state.hw_draw.fs;
  84.    const struct svga_fs_compile_key *key = &variant->key.fkey;
  85.    unsigned count = 0;
  86.  
  87.    /* SVGA_NEW_VS_VARIANT
  88.     */
  89.    if (key->num_unnormalized_coords) {
  90.       unsigned i;
  91.  
  92.       for (i = 0; i < key->num_textures; i++) {
  93.          if (key->tex[i].unnormalized) {
  94.             struct pipe_resource *tex = svga->curr.sampler_views[i]->texture;
  95.  
  96.             /* debug/sanity check */
  97.             assert(key->tex[i].width_height_idx == count);
  98.  
  99.             *dest++ = 1.0 / (float)tex->width0;
  100.             *dest++ = 1.0 / (float)tex->height0;
  101.             *dest++ = 1.0;
  102.             *dest++ = 1.0;
  103.  
  104.             count++;
  105.          }
  106.       }
  107.    }
  108.  
  109.    assert(count <= MAX_EXTRA_CONSTS);
  110.  
  111.    return count;
  112. }
  113.  
  114.  
  115. /**
  116.  * Emit any extra vertex shader constants into the buffer pointed
  117.  * to by 'dest'.
  118.  * In particular, these would be the scale and bias factors computed
  119.  * from the framebuffer size which are used to copy with differences in
  120.  * GL vs D3D coordinate spaces.  See svga_tgsi_insn.c for more info.
  121.  * \return number of float[4] constants put into the dest buffer
  122.  */
  123. static unsigned
  124. svga_get_extra_vs_constants(struct svga_context *svga, float *dest)
  125. {
  126.    const struct svga_shader_variant *variant = svga->state.hw_draw.vs;
  127.    const struct svga_vs_compile_key *key = &variant->key.vkey;
  128.    unsigned count = 0;
  129.  
  130.    /* SVGA_NEW_VS_VARIANT
  131.     */
  132.    if (key->need_prescale) {
  133.       memcpy(dest, svga->state.hw_clear.prescale.scale, 4 * sizeof(float));
  134.       dest += 4;
  135.  
  136.       memcpy(dest, svga->state.hw_clear.prescale.translate, 4 * sizeof(float));
  137.       dest += 4;
  138.  
  139.       count = 2;
  140.    }
  141.  
  142.    assert(count <= MAX_EXTRA_CONSTS);
  143.  
  144.    return count;
  145. }
  146.  
  147.  
  148. /**
  149.  * Check and emit one shader constant register.
  150.  * \param shader  PIPE_SHADER_FRAGMENT or PIPE_SHADER_VERTEX
  151.  * \param i  which float[4] constant to change
  152.  * \param value  the new float[4] value
  153.  */
  154. static enum pipe_error
  155. emit_const(struct svga_context *svga, unsigned shader, unsigned i,
  156.            const float *value)
  157. {
  158.    enum pipe_error ret = PIPE_OK;
  159.  
  160.    assert(shader < PIPE_SHADER_TYPES);
  161.    assert(i < SVGA3D_CONSTREG_MAX);
  162.  
  163.    if (memcmp(svga->state.hw_draw.cb[shader][i], value,
  164.               4 * sizeof(float)) != 0) {
  165.       if (SVGA_DEBUG & DEBUG_CONSTS)
  166.          debug_printf("%s %s %u: %f %f %f %f\n",
  167.                       __FUNCTION__,
  168.                       shader == PIPE_SHADER_VERTEX ? "VERT" : "FRAG",
  169.                       i,
  170.                       value[0],
  171.                       value[1],
  172.                       value[2],
  173.                       value[3]);
  174.  
  175.       ret = SVGA3D_SetShaderConst( svga->swc,
  176.                                    i,
  177.                                    svga_shader_type(shader),
  178.                                    SVGA3D_CONST_TYPE_FLOAT,
  179.                                    value );
  180.       if (ret != PIPE_OK)
  181.          return ret;
  182.  
  183.       memcpy(svga->state.hw_draw.cb[shader][i], value, 4 * sizeof(float));
  184.    }
  185.  
  186.    return ret;
  187. }
  188.  
  189.  
  190. /*
  191.  * Check and emit a range of shader constant registers, trying to coalesce
  192.  * successive shader constant updates in a single command in order to save
  193.  * space on the command buffer.  This is a HWv8 feature.
  194.  */
  195. static enum pipe_error
  196. emit_const_range(struct svga_context *svga,
  197.                  unsigned shader,
  198.                  unsigned offset,
  199.                  unsigned count,
  200.                  const float (*values)[4])
  201. {
  202.    unsigned i, j;
  203.    enum pipe_error ret;
  204.  
  205. #ifdef DEBUG
  206.    if (offset + count > SVGA3D_CONSTREG_MAX) {
  207.       debug_printf("svga: too many constants (offset %u + count %u = %u (max = %u))\n",
  208.                    offset, count, offset + count, SVGA3D_CONSTREG_MAX);
  209.    }
  210. #endif
  211.  
  212.    if (offset > SVGA3D_CONSTREG_MAX) {
  213.       /* This isn't OK, but if we propagate an error all the way up we'll
  214.        * just get into more trouble.
  215.        * XXX note that offset is always zero at this time so this is moot.
  216.        */
  217.       return PIPE_OK;
  218.    }
  219.  
  220.    if (offset + count > SVGA3D_CONSTREG_MAX) {
  221.       /* Just drop the extra constants for now.
  222.        * Ideally we should not have allowed the app to create a shader
  223.        * that exceeds our constant buffer size but there's no way to
  224.        * express that in gallium at this time.
  225.        */
  226.       count = SVGA3D_CONSTREG_MAX - offset;
  227.    }
  228.  
  229.    i = 0;
  230.    while (i < count) {
  231.       if (memcmp(svga->state.hw_draw.cb[shader][offset + i],
  232.                  values[i],
  233.                  4 * sizeof(float)) != 0) {
  234.          /* Found one dirty constant
  235.           */
  236.          if (SVGA_DEBUG & DEBUG_CONSTS)
  237.             debug_printf("%s %s %d: %f %f %f %f\n",
  238.                          __FUNCTION__,
  239.                          shader == PIPE_SHADER_VERTEX ? "VERT" : "FRAG",
  240.                          offset + i,
  241.                          values[i][0],
  242.                          values[i][1],
  243.                          values[i][2],
  244.                          values[i][3]);
  245.  
  246.          /* Look for more consecutive dirty constants.
  247.           */
  248.          j = i + 1;
  249.          while (j < count &&
  250.                 j < i + MAX_CONST_REG_COUNT &&
  251.                 memcmp(svga->state.hw_draw.cb[shader][offset + j],
  252.                        values[j],
  253.                        4 * sizeof(float)) != 0) {
  254.  
  255.             if (SVGA_DEBUG & DEBUG_CONSTS)
  256.                debug_printf("%s %s %d: %f %f %f %f\n",
  257.                             __FUNCTION__,
  258.                             shader == PIPE_SHADER_VERTEX ? "VERT" : "FRAG",
  259.                             offset + j,
  260.                             values[j][0],
  261.                             values[j][1],
  262.                             values[j][2],
  263.                             values[j][3]);
  264.  
  265.             ++j;
  266.          }
  267.  
  268.          assert(j >= i + 1);
  269.  
  270.          /* Send them all together.
  271.           */
  272.          if (svga_have_gb_objects(svga)) {
  273.             ret = SVGA3D_SetGBShaderConstsInline(svga->swc,
  274.                                                  offset + i, /* start */
  275.                                                  j - i,  /* count */
  276.                                                  svga_shader_type(shader),
  277.                                                  SVGA3D_CONST_TYPE_FLOAT,
  278.                                                  values + i);
  279.          }
  280.          else {
  281.             ret = SVGA3D_SetShaderConsts(svga->swc,
  282.                                          offset + i, j - i,
  283.                                          svga_shader_type(shader),
  284.                                          SVGA3D_CONST_TYPE_FLOAT,
  285.                                          values + i);
  286.          }
  287.          if (ret != PIPE_OK) {
  288.             return ret;
  289.          }
  290.  
  291.          /*
  292.           * Local copy of the hardware state.
  293.           */
  294.          memcpy(svga->state.hw_draw.cb[shader][offset + i],
  295.                 values[i],
  296.                 (j - i) * 4 * sizeof(float));
  297.  
  298.          i = j + 1;
  299.       } else {
  300.          ++i;
  301.       }
  302.    }
  303.  
  304.    return PIPE_OK;
  305. }
  306.  
  307.  
  308. /**
  309.  * Emit all the constants in a constant buffer for a shader stage.
  310.  */
  311. static enum pipe_error
  312. emit_consts(struct svga_context *svga, unsigned shader)
  313. {
  314.    struct svga_screen *ss = svga_screen(svga->pipe.screen);
  315.    struct pipe_transfer *transfer = NULL;
  316.    unsigned count;
  317.    const float (*data)[4] = NULL;
  318.    unsigned i;
  319.    enum pipe_error ret = PIPE_OK;
  320.    const unsigned offset = 0;
  321.  
  322.    assert(shader < PIPE_SHADER_TYPES);
  323.  
  324.    if (svga->curr.cbufs[shader].buffer == NULL)
  325.       goto done;
  326.  
  327.    data = (const float (*)[4])pipe_buffer_map(&svga->pipe,
  328.                                               svga->curr.cbufs[shader].buffer,
  329.                                               PIPE_TRANSFER_READ,
  330.                                               &transfer);
  331.    if (data == NULL) {
  332.       ret = PIPE_ERROR_OUT_OF_MEMORY;
  333.       goto done;
  334.    }
  335.  
  336.    /* sanity check */
  337.    assert(svga->curr.cbufs[shader].buffer->width0 >=
  338.           svga->curr.cbufs[shader].buffer_size);
  339.  
  340.    /* Use/apply the constant buffer size and offsets here */
  341.    count = svga->curr.cbufs[shader].buffer_size / (4 * sizeof(float));
  342.    data += svga->curr.cbufs[shader].buffer_offset / (4 * sizeof(float));
  343.  
  344.    if (ss->hw_version >= SVGA3D_HWVERSION_WS8_B1) {
  345.       ret = emit_const_range( svga, shader, offset, count, data );
  346.       if (ret != PIPE_OK) {
  347.          goto done;
  348.       }
  349.    } else {
  350.       for (i = 0; i < count; i++) {
  351.          ret = emit_const( svga, shader, offset + i, data[i] );
  352.          if (ret != PIPE_OK) {
  353.             goto done;
  354.          }
  355.       }
  356.    }
  357.  
  358. done:
  359.    if (data)
  360.       pipe_buffer_unmap(&svga->pipe, transfer);
  361.  
  362.    return ret;
  363. }
  364.  
  365.  
  366. static enum pipe_error
  367. emit_fs_consts(struct svga_context *svga, unsigned dirty)
  368. {
  369.    struct svga_screen *ss = svga_screen(svga->pipe.screen);
  370.    const struct svga_shader_variant *variant = svga->state.hw_draw.fs;
  371.    enum pipe_error ret = PIPE_OK;
  372.  
  373.    /* SVGA_NEW_FS_VARIANT
  374.     */
  375.    if (variant == NULL)
  376.       return PIPE_OK;
  377.  
  378.    /* SVGA_NEW_FS_CONST_BUFFER
  379.     */
  380.    ret = emit_consts( svga, PIPE_SHADER_FRAGMENT );
  381.    if (ret != PIPE_OK)
  382.       return ret;
  383.  
  384.    /* emit extra shader constants */
  385.    {
  386.       unsigned offset = variant->shader->info.file_max[TGSI_FILE_CONSTANT] + 1;
  387.       float extras[MAX_EXTRA_CONSTS][4];
  388.       unsigned count, i;
  389.  
  390.       count = svga_get_extra_fs_constants(svga, (float *) extras);
  391.  
  392.       if (ss->hw_version >= SVGA3D_HWVERSION_WS8_B1) {
  393.          ret = emit_const_range(svga, PIPE_SHADER_FRAGMENT, offset, count,
  394.                                 (const float (*) [4])extras);
  395.       } else {
  396.          for (i = 0; i < count; i++) {
  397.             ret = emit_const(svga, PIPE_SHADER_FRAGMENT, offset + i, extras[i]);
  398.             if (ret != PIPE_OK)
  399.                return ret;
  400.          }
  401.       }
  402.    }
  403.  
  404.    return ret;
  405. }
  406.  
  407.  
  408. struct svga_tracked_state svga_hw_fs_constants =
  409. {
  410.    "hw fs params",
  411.    (SVGA_NEW_FS_CONST_BUFFER |
  412.     SVGA_NEW_FS_VARIANT |
  413.     SVGA_NEW_TEXTURE_BINDING),
  414.    emit_fs_consts
  415. };
  416.  
  417.  
  418.  
  419. static enum pipe_error
  420. emit_vs_consts(struct svga_context *svga, unsigned dirty)
  421. {
  422.    struct svga_screen *ss = svga_screen(svga->pipe.screen);
  423.    const struct svga_shader_variant *variant = svga->state.hw_draw.vs;
  424.    enum pipe_error ret = PIPE_OK;
  425.  
  426.    /* SVGA_NEW_VS_VARIANT
  427.     */
  428.    if (variant == NULL)
  429.       return PIPE_OK;
  430.  
  431.    /* SVGA_NEW_VS_CONST_BUFFER
  432.     */
  433.    ret = emit_consts( svga, PIPE_SHADER_VERTEX );
  434.    if (ret != PIPE_OK)
  435.       return ret;
  436.  
  437.    /* emit extra shader constants */
  438.    {
  439.       unsigned offset = variant->shader->info.file_max[TGSI_FILE_CONSTANT] + 1;
  440.       float extras[MAX_EXTRA_CONSTS][4];
  441.       unsigned count, i;
  442.  
  443.       count = svga_get_extra_vs_constants(svga, (float *) extras);
  444.       assert(count <= Elements(extras));
  445.  
  446.       if (ss->hw_version >= SVGA3D_HWVERSION_WS8_B1) {
  447.          ret = emit_const_range(svga, PIPE_SHADER_VERTEX, offset, count,
  448.                                 (const float (*) [4]) extras);
  449.       } else {
  450.          for (i = 0; i < count; i++) {
  451.             ret = emit_const(svga, PIPE_SHADER_VERTEX, offset + i, extras[i]);
  452.             if (ret != PIPE_OK)
  453.                return ret;
  454.          }
  455.       }
  456.    }
  457.  
  458.    return ret;
  459. }
  460.  
  461.  
  462. struct svga_tracked_state svga_hw_vs_constants =
  463. {
  464.    "hw vs params",
  465.    (SVGA_NEW_PRESCALE |
  466.     SVGA_NEW_VS_CONST_BUFFER |
  467.     SVGA_NEW_VS_VARIANT),
  468.    emit_vs_consts
  469. };
  470.