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/*
* Copyright © 2011 Intel Corporation
*
* 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 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 "main/mtypes.h"
#include "main/blend.h"
#include "main/samplerobj.h"
#include "main/texformat.h"
#include "main/teximage.h"
#include "program/prog_parameter.h"
#include "program/prog_instruction.h"
#include "intel_mipmap_tree.h"
#include "intel_batchbuffer.h"
#include "intel_tex.h"
#include "intel_fbo.h"
#include "intel_buffer_objects.h"
#include "brw_context.h"
#include "brw_state.h"
#include "brw_defines.h"
#include "brw_wm.h"
void
gen7_check_surface_setup(uint32_t *surf, bool is_render_target)
{
unsigned num_multisamples = surf[4] & INTEL_MASK(5, 3);
unsigned multisampled_surface_storage_format = surf[4] & (1 << 6);
unsigned surface_array_spacing = surf[0] & (1 << 10);
bool is_multisampled = num_multisamples != GEN7_SURFACE_MULTISAMPLECOUNT_1;
(void) surface_array_spacing;
/* From the Ivybridge PRM, Volume 4 Part 1, page 66 (RENDER_SURFACE_STATE
* dword 0 bit 10 "Surface Array Spacing" Programming Notes):
*
* If Multisampled Surface Storage Format is MSFMT_MSS and Number of
* Multisamples is not MULTISAMPLECOUNT_1, this field must be set to
* ARYSPC_LOD0.
*/
if (multisampled_surface_storage_format == GEN7_SURFACE_MSFMT_MSS
&& is_multisampled)
assert(surface_array_spacing == GEN7_SURFACE_ARYSPC_LOD0);
/* From the Ivybridge PRM, Volume 4 Part 1, page 72 (RENDER_SURFACE_STATE
* dword 4 bit 6 "Multisampled Surface Storage" Programming Notes):
*
* All multisampled render target surfaces must have this field set to
* MSFMT_MSS.
*
* But also:
*
* This field is ignored if Number of Multisamples is MULTISAMPLECOUNT_1.
*/
if (is_render_target && is_multisampled) {
assert(multisampled_surface_storage_format == GEN7_SURFACE_MSFMT_MSS);
}
/* From the Ivybridge PRM, Volume 4 Part 1, page 72 (RENDER_SURFACE_STATE
* dword 4 bit 6 "Multisampled Surface Storage Format" Errata):
*
* If the surface’s Number of Multisamples is MULTISAMPLECOUNT_8, Width
* is >= 8192 (meaning the actual surface width is >= 8193 pixels), this
* field must be set to MSFMT_MSS.
*/
uint32_t width = GET_FIELD(surf[2], GEN7_SURFACE_WIDTH) + 1;
if (num_multisamples == GEN7_SURFACE_MULTISAMPLECOUNT_8 && width >= 8193) {
assert(multisampled_surface_storage_format == GEN7_SURFACE_MSFMT_MSS);
}
/* From the Ivybridge PRM, Volume 4 Part 1, page 72 (RENDER_SURFACE_STATE
* dword 4 bit 6 "Multisampled Surface Storage Format" Errata):
*
* If the surface’s Number of Multisamples is MULTISAMPLECOUNT_8,
* ((Depth+1) * (Height+1)) is > 4,194,304, OR if the surface’s Number of
* Multisamples is MULTISAMPLECOUNT_4, ((Depth+1) * (Height+1)) is >
* 8,388,608, this field must be set to MSFMT_DEPTH_STENCIL.This field
* must be set to MSFMT_DEPTH_STENCIL if Surface Format is one of the
* following: I24X8_UNORM, L24X8_UNORM, A24X8_UNORM, or
* R24_UNORM_X8_TYPELESS.
*
* But also (from the Programming Notes):
*
* This field is ignored if Number of Multisamples is MULTISAMPLECOUNT_1.
*/
uint32_t depth = GET_FIELD(surf[3], BRW_SURFACE_DEPTH) + 1;
uint32_t height = GET_FIELD(surf[2], GEN7_SURFACE_HEIGHT) + 1;
if (num_multisamples == GEN7_SURFACE_MULTISAMPLECOUNT_8 &&
depth * height > 4194304) {
assert(multisampled_surface_storage_format ==
GEN7_SURFACE_MSFMT_DEPTH_STENCIL);
}
if (num_multisamples == GEN7_SURFACE_MULTISAMPLECOUNT_4 &&
depth * height > 8388608) {
assert(multisampled_surface_storage_format ==
GEN7_SURFACE_MSFMT_DEPTH_STENCIL);
}
if (is_multisampled) {
switch (GET_FIELD(surf[0], BRW_SURFACE_FORMAT)) {
case ISL_FORMAT_I24X8_UNORM:
case ISL_FORMAT_L24X8_UNORM:
case ISL_FORMAT_A24X8_UNORM:
case ISL_FORMAT_R24_UNORM_X8_TYPELESS:
assert(multisampled_surface_storage_format ==
GEN7_SURFACE_MSFMT_DEPTH_STENCIL);
}
}
}
/**
* Creates a null surface.
*
* This is used when the shader doesn't write to any color output. An FB
* write to target 0 will still be emitted, because that's how the thread is
* terminated (and computed depth is returned), so we need to have the
* hardware discard the target 0 color output..
*/
static void
gen7_emit_null_surface_state(struct brw_context *brw,
unsigned width,
unsigned height,
unsigned samples,
uint32_t *out_offset)
{
/* From the Ivy bridge PRM, Vol4 Part1 p62 (Surface Type: Programming
* Notes):
*
* A null surface is used in instances where an actual surface is not
* bound. When a write message is generated to a null surface, no
* actual surface is written to. When a read message (including any
* sampling engine message) is generated to a null surface, the result
* is all zeros. Note that a null surface type is allowed to be used
* with all messages, even if it is not specificially indicated as
* supported. All of the remaining fields in surface state are ignored
* for null surfaces, with the following exceptions: Width, Height,
* Depth, LOD, and Render Target View Extent fields must match the
* depth buffer’s corresponding state for all render target surfaces,
* including null.
*/
uint32_t *surf = brw_state_batch(brw, 8 * 4, 32, out_offset);
memset(surf, 0, 8 * 4);
/* From the Ivybridge PRM, Volume 4, Part 1, page 65,
* Tiled Surface: Programming Notes:
* "If Surface Type is SURFTYPE_NULL, this field must be TRUE."
*/
surf[0] = BRW_SURFACE_NULL << BRW_SURFACE_TYPE_SHIFT |
ISL_FORMAT_B8G8R8A8_UNORM << BRW_SURFACE_FORMAT_SHIFT |
GEN7_SURFACE_TILING_Y;
surf[2] = SET_FIELD(width - 1, GEN7_SURFACE_WIDTH) |
SET_FIELD(height - 1, GEN7_SURFACE_HEIGHT);
gen7_check_surface_setup(surf, true /* is_render_target */);
}
void
gen7_init_vtable_surface_functions(struct brw_context *brw)
{
brw->vtbl.update_renderbuffer_surface = brw_update_renderbuffer_surface;
brw->vtbl.emit_null_surface_state = gen7_emit_null_surface_state;
}
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