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      1 /*
      2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
      3  Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
      4  develop this 3D driver.
      5 
      6  Permission is hereby granted, free of charge, to any person obtaining
      7  a copy of this software and associated documentation files (the
      8  "Software"), to deal in the Software without restriction, including
      9  without limitation the rights to use, copy, modify, merge, publish,
     10  distribute, sublicense, and/or sell copies of the Software, and to
     11  permit persons to whom the Software is furnished to do so, subject to
     12  the following conditions:
     13 
     14  The above copyright notice and this permission notice (including the
     15  next paragraph) shall be included in all copies or substantial
     16  portions of the Software.
     17 
     18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     19  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     20  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
     21  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
     22  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     23  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     24  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     25 
     26 **********************************************************************/
     27 
     28 /*
     29  * Authors:
     30  *   Keith Whitwell <keith (at) tungstengraphics.com>
     31  */
     32 
     33 #include "main/glheader.h"
     34 #include "main/mtypes.h"
     35 #include "main/imports.h"
     36 #include "main/macros.h"
     37 #include "main/colormac.h"
     38 #include "main/renderbuffer.h"
     39 #include "main/framebuffer.h"
     40 
     41 #include "intel_batchbuffer.h"
     42 #include "intel_regions.h"
     43 #include "intel_fbo.h"
     44 
     45 #include "brw_context.h"
     46 #include "brw_defines.h"
     47 #include "brw_state.h"
     48 #include "brw_draw.h"
     49 #include "brw_vs.h"
     50 #include "brw_wm.h"
     51 
     52 #include "gen6_blorp.h"
     53 #include "gen7_blorp.h"
     54 
     55 #include "glsl/ralloc.h"
     56 
     57 static void
     58 dri_bo_release(drm_intel_bo **bo)
     59 {
     60    drm_intel_bo_unreference(*bo);
     61    *bo = NULL;
     62 }
     63 
     64 
     65 /**
     66  * called from intelDestroyContext()
     67  */
     68 static void brw_destroy_context( struct intel_context *intel )
     69 {
     70    struct brw_context *brw = brw_context(&intel->ctx);
     71 
     72    brw_destroy_state(brw);
     73    brw_draw_destroy( brw );
     74 
     75    ralloc_free(brw->wm.compile_data);
     76 
     77    dri_bo_release(&brw->curbe.curbe_bo);
     78    dri_bo_release(&brw->vs.const_bo);
     79    dri_bo_release(&brw->wm.const_bo);
     80 
     81    free(brw->curbe.last_buf);
     82    free(brw->curbe.next_buf);
     83 
     84    drm_intel_gem_context_destroy(intel->hw_ctx);
     85 }
     86 
     87 /**
     88  * Update the hardware state for drawing into a window or framebuffer object.
     89  *
     90  * Called by glDrawBuffer, glBindFramebufferEXT, MakeCurrent, and other
     91  * places within the driver.
     92  *
     93  * Basically, this needs to be called any time the current framebuffer
     94  * changes, the renderbuffers change, or we need to draw into different
     95  * color buffers.
     96  */
     97 static void
     98 brw_update_draw_buffer(struct intel_context *intel)
     99 {
    100    struct gl_context *ctx = &intel->ctx;
    101    struct gl_framebuffer *fb = ctx->DrawBuffer;
    102 
    103    if (!fb) {
    104       /* this can happen during the initial context initialization */
    105       return;
    106    }
    107 
    108    /* Do this here, not core Mesa, since this function is called from
    109     * many places within the driver.
    110     */
    111    if (ctx->NewState & _NEW_BUFFERS) {
    112       /* this updates the DrawBuffer->_NumColorDrawBuffers fields, etc */
    113       _mesa_update_framebuffer(ctx);
    114       /* this updates the DrawBuffer's Width/Height if it's a FBO */
    115       _mesa_update_draw_buffer_bounds(ctx);
    116    }
    117 
    118    if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
    119       /* this may occur when we're called by glBindFrameBuffer() during
    120        * the process of someone setting up renderbuffers, etc.
    121        */
    122       /*_mesa_debug(ctx, "DrawBuffer: incomplete user FBO\n");*/
    123       return;
    124    }
    125 
    126    /* Mesa's Stencil._Enabled field is updated when
    127     * _NEW_BUFFERS | _NEW_STENCIL, but i965 code assumes that the value
    128     * only changes with _NEW_STENCIL (which seems sensible).  So flag it
    129     * here since this is the _NEW_BUFFERS path.
    130     */
    131    intel->NewGLState |= (_NEW_DEPTH | _NEW_STENCIL);
    132 
    133    /* The driver uses this in places that need to look up
    134     * renderbuffers' buffer objects.
    135     */
    136    intel->NewGLState |= _NEW_BUFFERS;
    137 
    138    /* update viewport/scissor since it depends on window size */
    139    intel->NewGLState |= _NEW_VIEWPORT | _NEW_SCISSOR;
    140 
    141    /* Update culling direction which changes depending on the
    142     * orientation of the buffer:
    143     */
    144    intel->NewGLState |= _NEW_POLYGON;
    145 }
    146 
    147 /**
    148  * called from intel_batchbuffer_flush and children before sending a
    149  * batchbuffer off.
    150  *
    151  * Note that ALL state emitted here must fit in the reserved space
    152  * at the end of a batchbuffer.  If you add more GPU state, increase
    153  * the BATCH_RESERVED macro.
    154  */
    155 static void brw_finish_batch(struct intel_context *intel)
    156 {
    157    struct brw_context *brw = brw_context(&intel->ctx);
    158    brw_emit_query_end(brw);
    159 
    160    if (brw->curbe.curbe_bo) {
    161       drm_intel_gem_bo_unmap_gtt(brw->curbe.curbe_bo);
    162       drm_intel_bo_unreference(brw->curbe.curbe_bo);
    163       brw->curbe.curbe_bo = NULL;
    164    }
    165 }
    166 
    167 
    168 /**
    169  * called from intelFlushBatchLocked
    170  */
    171 static void brw_new_batch( struct intel_context *intel )
    172 {
    173    struct brw_context *brw = brw_context(&intel->ctx);
    174 
    175    /* If the kernel supports hardware contexts, then most hardware state is
    176     * preserved between batches; we only need to re-emit state that is required
    177     * to be in every batch.  Otherwise we need to re-emit all the state that
    178     * would otherwise be stored in the context (which for all intents and
    179     * purposes means everything).
    180     */
    181    if (intel->hw_ctx == NULL)
    182       brw->state.dirty.brw |= BRW_NEW_CONTEXT;
    183 
    184    brw->state.dirty.brw |= BRW_NEW_BATCH;
    185 
    186    /* Assume that the last command before the start of our batch was a
    187     * primitive, for safety.
    188     */
    189    intel->batch.need_workaround_flush = true;
    190 
    191    brw->state_batch_count = 0;
    192 
    193    /* Gen7 needs to track what the real transform feedback vertex count was at
    194     * the start of the batch, since the kernel will be resetting the offset to
    195     * 0.
    196     */
    197    brw->sol.offset_0_batch_start = brw->sol.svbi_0_starting_index;
    198 
    199    brw->vb.nr_current_buffers = 0;
    200    brw->ib.type = -1;
    201 
    202    /* Mark that the current program cache BO has been used by the GPU.
    203     * It will be reallocated if we need to put new programs in for the
    204     * next batch.
    205     */
    206    brw->cache.bo_used_by_gpu = true;
    207 }
    208 
    209 static void brw_invalidate_state( struct intel_context *intel, GLuint new_state )
    210 {
    211    /* nothing */
    212 }
    213 
    214 /**
    215  * \see intel_context.vtbl.is_hiz_depth_format
    216  */
    217 static bool brw_is_hiz_depth_format(struct intel_context *intel,
    218                                     gl_format format)
    219 {
    220    if (!intel->has_hiz)
    221       return false;
    222 
    223    switch (format) {
    224    case MESA_FORMAT_Z32_FLOAT:
    225    case MESA_FORMAT_Z32_FLOAT_X24S8:
    226    case MESA_FORMAT_X8_Z24:
    227    case MESA_FORMAT_S8_Z24:
    228       return true;
    229    default:
    230       return false;
    231    }
    232 }
    233 
    234 void brwInitVtbl( struct brw_context *brw )
    235 {
    236    brw->intel.vtbl.check_vertex_size = 0;
    237    brw->intel.vtbl.emit_state = 0;
    238    brw->intel.vtbl.reduced_primitive_state = 0;
    239    brw->intel.vtbl.render_start = 0;
    240    brw->intel.vtbl.update_texture_state = 0;
    241 
    242    brw->intel.vtbl.invalidate_state = brw_invalidate_state;
    243    brw->intel.vtbl.new_batch = brw_new_batch;
    244    brw->intel.vtbl.finish_batch = brw_finish_batch;
    245    brw->intel.vtbl.destroy = brw_destroy_context;
    246    brw->intel.vtbl.update_draw_buffer = brw_update_draw_buffer;
    247    brw->intel.vtbl.debug_batch = brw_debug_batch;
    248    brw->intel.vtbl.annotate_aub = brw_annotate_aub;
    249    brw->intel.vtbl.render_target_supported = brw_render_target_supported;
    250    brw->intel.vtbl.is_hiz_depth_format = brw_is_hiz_depth_format;
    251 
    252    assert(brw->intel.gen >= 4);
    253    if (brw->intel.gen >= 7) {
    254       gen7_init_vtable_surface_functions(brw);
    255    } else if (brw->intel.gen >= 4) {
    256       gen4_init_vtable_surface_functions(brw);
    257    }
    258 }
    259