| /* |
| Copyright (C) Intel Corp. 2006. All Rights Reserved. |
| Intel funded Tungsten Graphics to |
| develop this 3D driver. |
| |
| 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 (including the |
| next paragraph) 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 COPYRIGHT OWNER(S) 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. |
| |
| **********************************************************************/ |
| /* |
| * Authors: |
| * Keith Whitwell <keithw@vmware.com> |
| */ |
| |
| #include "brw_context.h" |
| #include "brw_state.h" |
| #include "brw_defines.h" |
| #include "main/framebuffer.h" |
| |
| static void |
| upload_clip_vp(struct brw_context *brw) |
| { |
| struct gl_context *ctx = &brw->ctx; |
| struct brw_clipper_viewport *vp; |
| |
| vp = brw_state_batch(brw, AUB_TRACE_CLIP_VP_STATE, |
| sizeof(*vp), 32, &brw->clip.vp_offset); |
| |
| const float maximum_post_clamp_delta = 4096; |
| float gbx = maximum_post_clamp_delta / ctx->ViewportArray[0].Width; |
| float gby = maximum_post_clamp_delta / ctx->ViewportArray[0].Height; |
| |
| vp->xmin = -gbx; |
| vp->xmax = gbx; |
| vp->ymin = -gby; |
| vp->ymax = gby; |
| } |
| |
| static void |
| brw_upload_clip_unit(struct brw_context *brw) |
| { |
| struct gl_context *ctx = &brw->ctx; |
| struct brw_clip_unit_state *clip; |
| |
| /* _NEW_BUFFERS */ |
| const struct gl_framebuffer *fb = ctx->DrawBuffer; |
| const float fb_width = (float)_mesa_geometric_width(fb); |
| const float fb_height = (float)_mesa_geometric_height(fb); |
| |
| upload_clip_vp(brw); |
| |
| clip = brw_state_batch(brw, AUB_TRACE_CLIP_STATE, |
| sizeof(*clip), 32, &brw->clip.state_offset); |
| memset(clip, 0, sizeof(*clip)); |
| |
| /* BRW_NEW_PROGRAM_CACHE | BRW_NEW_CLIP_PROG_DATA */ |
| clip->thread0.grf_reg_count = (ALIGN(brw->clip.prog_data->total_grf, 16) / |
| 16 - 1); |
| clip->thread0.kernel_start_pointer = |
| brw_program_reloc(brw, |
| brw->clip.state_offset + |
| offsetof(struct brw_clip_unit_state, thread0), |
| brw->clip.prog_offset + |
| (clip->thread0.grf_reg_count << 1)) >> 6; |
| |
| clip->thread1.floating_point_mode = BRW_FLOATING_POINT_NON_IEEE_754; |
| clip->thread1.single_program_flow = 1; |
| |
| clip->thread3.urb_entry_read_length = brw->clip.prog_data->urb_read_length; |
| clip->thread3.const_urb_entry_read_length = |
| brw->clip.prog_data->curb_read_length; |
| |
| /* BRW_NEW_CURBE_OFFSETS */ |
| clip->thread3.const_urb_entry_read_offset = brw->curbe.clip_start * 2; |
| clip->thread3.dispatch_grf_start_reg = 1; |
| clip->thread3.urb_entry_read_offset = 0; |
| |
| /* BRW_NEW_URB_FENCE */ |
| clip->thread4.nr_urb_entries = brw->urb.nr_clip_entries; |
| clip->thread4.urb_entry_allocation_size = brw->urb.vsize - 1; |
| /* If we have enough clip URB entries to run two threads, do so. |
| */ |
| if (brw->urb.nr_clip_entries >= 10) { |
| /* Half of the URB entries go to each thread, and it has to be an |
| * even number. |
| */ |
| assert(brw->urb.nr_clip_entries % 2 == 0); |
| |
| /* Although up to 16 concurrent Clip threads are allowed on Ironlake, |
| * only 2 threads can output VUEs at a time. |
| */ |
| if (brw->gen == 5) |
| clip->thread4.max_threads = 16 - 1; |
| else |
| clip->thread4.max_threads = 2 - 1; |
| } else { |
| assert(brw->urb.nr_clip_entries >= 5); |
| clip->thread4.max_threads = 1 - 1; |
| } |
| |
| if (unlikely(INTEL_DEBUG & DEBUG_STATS)) |
| clip->thread4.stats_enable = 1; |
| |
| /* _NEW_TRANSFORM */ |
| if (brw->gen == 5 || brw->is_g4x) |
| clip->clip5.userclip_enable_flags = ctx->Transform.ClipPlanesEnabled; |
| else |
| /* Up to 6 actual clip flags, plus the 7th for negative RHW workaround. */ |
| clip->clip5.userclip_enable_flags = (ctx->Transform.ClipPlanesEnabled & 0x3f) | 0x40; |
| |
| clip->clip5.userclip_must_clip = 1; |
| |
| /* enable guardband clipping if we can */ |
| if (ctx->ViewportArray[0].X == 0 && |
| ctx->ViewportArray[0].Y == 0 && |
| ctx->ViewportArray[0].Width == fb_width && |
| ctx->ViewportArray[0].Height == fb_height) |
| { |
| clip->clip5.guard_band_enable = 1; |
| clip->clip6.clipper_viewport_state_ptr = |
| (brw->batch.bo->offset64 + brw->clip.vp_offset) >> 5; |
| |
| /* emit clip viewport relocation */ |
| drm_intel_bo_emit_reloc(brw->batch.bo, |
| (brw->clip.state_offset + |
| offsetof(struct brw_clip_unit_state, clip6)), |
| brw->batch.bo, brw->clip.vp_offset, |
| I915_GEM_DOMAIN_INSTRUCTION, 0); |
| } |
| |
| /* _NEW_TRANSFORM */ |
| if (!ctx->Transform.DepthClamp) |
| clip->clip5.viewport_z_clip_enable = 1; |
| clip->clip5.viewport_xy_clip_enable = 1; |
| clip->clip5.vertex_position_space = BRW_CLIP_NDCSPACE; |
| if (ctx->Transform.ClipDepthMode == GL_ZERO_TO_ONE) |
| clip->clip5.api_mode = BRW_CLIP_API_DX; |
| else |
| clip->clip5.api_mode = BRW_CLIP_API_OGL; |
| clip->clip5.clip_mode = brw->clip.prog_data->clip_mode; |
| |
| if (brw->is_g4x) |
| clip->clip5.negative_w_clip_test = 1; |
| |
| clip->viewport_xmin = -1; |
| clip->viewport_xmax = 1; |
| clip->viewport_ymin = -1; |
| clip->viewport_ymax = 1; |
| |
| brw->ctx.NewDriverState |= BRW_NEW_GEN4_UNIT_STATE; |
| } |
| |
| const struct brw_tracked_state brw_clip_unit = { |
| .dirty = { |
| .mesa = _NEW_BUFFERS | |
| _NEW_TRANSFORM | |
| _NEW_VIEWPORT, |
| .brw = BRW_NEW_BATCH | |
| BRW_NEW_BLORP | |
| BRW_NEW_CLIP_PROG_DATA | |
| BRW_NEW_CURBE_OFFSETS | |
| BRW_NEW_PROGRAM_CACHE | |
| BRW_NEW_URB_FENCE, |
| }, |
| .emit = brw_upload_clip_unit, |
| }; |