// SPDX-License-Identifier: MIT
/*
* Copyright © 2020 Intel Corporation
*/
/*
* Kernel for PAVP buffer clear.
*
* 1. Clear all 64 GRF registers assigned to the kernel with designated value;
* 2. Write 32x16 block of all "0" to render target buffer which indirectly clears
* 512 bytes of Render Cache.
*/
/* Store designated "clear GRF" value */
mov(1) f0.1<1>UW g1.2<0,1,0>UW { align1 1N };
/**
* Curbe Format
*
* DW 1.0 - Block Offset to write Render Cache
* DW 1.1 [15:0] - Clear Word
* DW 1.2 - Delay iterations
* DW 1.3 - Enable Instrumentation (only for debug)
* DW 1.4 - Rsvd (intended for context ID)
* DW 1.5 - [31:16]:SliceCount, [15:0]:SubSlicePerSliceCount
* DW 1.6 - Rsvd MBZ (intended for Enable Wait on Total Thread Count)
* DW 1.7 - Rsvd MBZ (inteded for Total Thread Count)
*
* Binding Table
*
* BTI 0: 2D Surface to help clear L3 (Render/Data Cache)
* BTI 1: Wait/Instrumentation Buffer
* Size : (SliceCount * SubSliceCount * 16 EUs/SubSlice) rows * (16 threads/EU) cols (Format R32_UINT)
* Expected to be initialized to 0 by driver/another kernel
* Layout:
* RowN: Histogram for EU-N: (SliceID*SubSlicePerSliceCount + SSID)*16 + EUID [assume max 16 EUs / SS]
* Col-k[DW-k]: Threads Executed on ThreadID-k for EU-N
*/
add(1) g1.2<1>UD g1.2<0,1,0>UD 0x00000001UD { align1 1N }; /* Loop count to delay kernel: Init to (g1.2 + 1) */
cmp.z.f0.0(1) null<1>UD g1.3<0,1,0>UD 0x00000000UD { align1 1N };
(+f0.0) jmpi(1) 352D { align1 WE_all 1N };
/**
* State Register has info on where this thread is running
* IVB: sr0.0 :: [15:13]: MBZ, 12: HSID (Half-Slice ID), [11:8]EUID, [2:0] ThreadSlotID
* HSW: sr0.0 :: 15: MBZ, [14:13]: SliceID, 12: HSID (Half-Slice ID), [11:8]EUID, [2:0] ThreadSlotID
*/
mov(8) g3<1>UD 0x00000000UD { align1 1Q };
shr(1) g3<1>D sr0<0,1,0>D 12D { align1 1N };
and(1) g3<1>D g3<0,1,0>D 1D { align1 1N }; /* g3 has HSID */
shr(1) g3.1<1>D sr0<0,1,0>D 13D { align1 1N };
and(1) g3.1<1>D g3.1<0,1,0>D 3D { align1 1N }; /* g3.1 has sliceID */
mul(1) g3.5<1>D g3.1<0,1,0>D g1.10<0,1,0>UW { align1 1N };
add(1) g3<1>D g3<0,1,0>D g3.5<0,1,0>D { align1 1N }; /* g3 = sliceID * SubSlicePerSliceCount + HSID */
shr(1) g3.2<1>D sr0<0,1,0>D 8D { align1 1N };
and(1) g3.2<1>D g3.2<0,1,0>D 15D { align1 1N }; /* g3.2 = EUID */
mul(1) g3.4<1>D g3<0,1,0>D 16D { align1 1N };
add(1) g3.2<1>D g3.2<0,1,0>D g3.4<0,1,0>D { align1 1N }; /* g3.2 now points to EU row number (Y-pixel = V address ) in instrumentation surf */
mov(8) g5<1>UD 0x00000000UD { align1 1Q };
and(1) g3.3<1>D sr0<0,1,0>D 7D { align1 1N };
mul(1) g3.3<1>D g3.3<0,1,0>D 4D { align1 1N };
mov(8) g4<1>UD g0<8,8,1>UD { align1 1Q }; /* Initialize message header with g0 */
mov(1) g4<1>UD g3.3<0,1,0>UD { align1 1N }; /* Block offset */
mov(1) g4.1<1>UD g3.2<0,1,0>UD { align1 1N }; /* Block offset */
mov(1) g4.2<1>UD 0x00000003UD { align1 1N }; /* Block size (1 row x 4 bytes) */
and(1) g4.3<1>UD g4.3<0,1,0>UW 0xffffffffUD { align1 1N };
/* Media block read to fetch current value at specified location in instrumentation buffer */
sendc(8) g5<1>UD g4<8,8,1>F 0x02190001
render MsgDesc: media block read MsgCtrl = 0x0 Surface = 1 mlen 1 rlen 1 { align1 1Q };
add(1) g5<1>D g5<0,1,0>D 1D { align1 1N };
/* Media block write for updated value at specified location in instrumentation buffer */
sendc(8) g5<1>UD g4<8,8,1>F 0x040a8001
render MsgDesc: media block write MsgCtrl = 0x0 Surface = 1 mlen 2 rlen 0 { align1 1Q };
/* Delay thread for specified parameter */
add.nz.f0.0(1) g1.2<1>UD g1.2<0,1,0>UD -1D { align1 1N };
(+f0.0) jmpi(1) -32D { align1 WE_all 1N };
/* Store designated "clear GRF" value */
mov(1) f0.1<1>UW g1.2<0,1,0>UW { align1 1N };
/* Initialize looping parameters */
mov(1) a0<1>D 0D { align1 1N }; /* Initialize a0.0:w=0 */
mov(1) a0.4<1>W 127W { align1 1N }; /* Loop count. Each loop contains 16 GRF's */
/* Write 32x16 all "0" block */
mov(8) g2<1>UD g0<8,8,1>UD { align1 1Q };
mov(8) g127<1>UD g0<8,8,1>UD { align1 1Q };
mov(2) g2<1>UD g1<2,2,1>UW { align1 1N };
mov(1) g2.2<1>UD 0x000f000fUD { align1 1N }; /* Block size (16x16) */
and(1) g2.3<1>UD g2.3<0,1,0>UW 0xffffffefUD { align1 1N };
mov(16) g3<1>UD 0x00000000UD { align1 1H };
mov(16) g4<1>UD 0x00000000UD { align1 1H };
mov(16) g5<1>UD 0x00000000UD { align1 1H };
mov(16) g6<1>UD 0x00000000UD { align1 1H };
mov(16) g7<1>UD 0x00000000UD { align1 1H };
mov(16) g8<1>UD 0x00000000UD { align1 1H };
mov(16) g9<1>UD 0x00000000UD { align1 1H };
mov(16) g10<1>UD 0x00000000UD { align1 1H };
sendc(8) null<1>UD g2<8,8,1>F 0x120a8000
render MsgDesc: media block write MsgCtrl = 0x0 Surface = 0 mlen 9 rlen 0 { align1 1Q };
add(1) g2<1>UD g1<0,1,0>UW 0x0010UW { align1 1N };
sendc(8) null<1>UD g2<8,8,1>F 0x120a8000
render MsgDesc: media block write MsgCtrl = 0x0 Surface = 0 mlen 9 rlen 0 { align1 1Q };
/* Now, clear all GRF registers */
add.nz.f0.0(1) a0.4<1>W a0.4<0,1,0>W -1W { align1 1N };
mov(16) g[a0]<1>UW f0.1<0,1,0>UW { align1 1H };
add(1) a0<1>D a0<0,1,0>D 32D { align1 1N };
(+f0.0) jmpi(1) -64D { align1 WE_all 1N };
/* Terminante the thread */
sendc(8) null<1>UD g127<8,8,1>F 0x82000010
thread_spawner MsgDesc: mlen 1 rlen 0 { align1 1Q EOT };
Codebase Browser
linux