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drm/amdkfd: Remove dead code from gfx8/gfx9 trap handlers

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Signed-off-by: Jay Cornwall <jay.cornwall@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jay Cornwall 2019-07-24 12:26:08 -05:00 committed by Alex Deucher
parent a36e896740
commit 306fc9c568
2 changed files with 4 additions and 764 deletions
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393
drivers/gpu/drm/amd/amdkfd/cwsr_trap_handler_gfx8.asm
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@ -24,78 +24,6 @@
* PROJECT=vi ./sp3 cwsr_trap_handler_gfx8.asm -hex tmp.hex
*/
/* HW (VI) source code for CWSR trap handler */
/* Version 18 + multiple trap handler */
// this performance-optimal version was originally from Seven Xu at SRDC
// Revison #18 --...
/* Rev History
** #1. Branch from gc dv. //gfxip/gfx8/main/src/test/suites/block/cs/sr/cs_trap_handler.sp3#1,#50, #51, #52-53(Skip, Already Fixed by PV), #54-56(merged),#57-58(mergerd, skiped-already fixed by PV)
** #4. SR Memory Layout:
** 1. VGPR-SGPR-HWREG-{LDS}
** 2. tba_hi.bits.26 - reconfigured as the first wave in tg bits, for defer Save LDS for a threadgroup.. performance concern..
** #5. Update: 1. Accurate g8sr_ts_save_d timestamp
** #6. Update: 1. Fix s_barrier usage; 2. VGPR s/r using swizzle buffer?(NoNeed, already matched the swizzle pattern, more investigation)
** #7. Update: 1. don't barrier if noLDS
** #8. Branch: 1. Branch to ver#0, which is very similar to gc dv version
** 2. Fix SQ issue by s_sleep 2
** #9. Update: 1. Fix scc restore failed issue, restore wave_status at last
** 2. optimize s_buffer save by burst 16sgprs...
** #10. Update 1. Optimize restore sgpr by busrt 16 sgprs.
** #11. Update 1. Add 2 more timestamp for debug version
** #12. Update 1. Add VGPR SR using DWx4, some case improve and some case drop performance
** #13. Integ 1. Always use MUBUF for PV trap shader...
** #14. Update 1. s_buffer_store soft clause...
** #15. Update 1. PERF - sclar write with glc:0/mtype0 to allow L2 combine. perf improvement a lot.
** #16. Update 1. PRRF - UNROLL LDS_DMA got 2500cycle save in IP tree
** #17. Update 1. FUNC - LDS_DMA has issues while ATC, replace with ds_read/buffer_store for save part[TODO restore part]
** 2. PERF - Save LDS before save VGPR to cover LDS save long latency...
** #18. Update 1. FUNC - Implicitly estore STATUS.VCCZ, which is not writable by s_setreg_b32
** 2. FUNC - Handle non-CWSR traps
*/
var G8SR_WDMEM_HWREG_OFFSET = 0
var G8SR_WDMEM_SGPR_OFFSET = 128 // in bytes
// Keep definition same as the app shader, These 2 time stamps are part of the app shader... Should before any Save and after restore.
var G8SR_DEBUG_TIMESTAMP = 0
var G8SR_DEBUG_TS_SAVE_D_OFFSET = 40*4 // ts_save_d timestamp offset relative to SGPR_SR_memory_offset
var s_g8sr_ts_save_s = s[34:35] // save start
var s_g8sr_ts_sq_save_msg = s[36:37] // The save shader send SAVEWAVE msg to spi
var s_g8sr_ts_spi_wrexec = s[38:39] // the SPI write the sr address to SQ
var s_g8sr_ts_save_d = s[40:41] // save end
var s_g8sr_ts_restore_s = s[42:43] // restore start
var s_g8sr_ts_restore_d = s[44:45] // restore end
var G8SR_VGPR_SR_IN_DWX4 = 0
var G8SR_SAVE_BUF_RSRC_WORD1_STRIDE_DWx4 = 0x00100000 // DWx4 stride is 4*4Bytes
var G8SR_RESTORE_BUF_RSRC_WORD1_STRIDE_DWx4 = G8SR_SAVE_BUF_RSRC_WORD1_STRIDE_DWx4
/*************************************************************************/
/* control on how to run the shader */
/*************************************************************************/
//any hack that needs to be made to run this code in EMU (either because various EMU code are not ready or no compute save & restore in EMU run)
var EMU_RUN_HACK = 0
var EMU_RUN_HACK_RESTORE_NORMAL = 0
var EMU_RUN_HACK_SAVE_NORMAL_EXIT = 0
var EMU_RUN_HACK_SAVE_SINGLE_WAVE = 0
var EMU_RUN_HACK_SAVE_FIRST_TIME = 0 //for interrupted restore in which the first save is through EMU_RUN_HACK
var EMU_RUN_HACK_SAVE_FIRST_TIME_TBA_LO = 0 //for interrupted restore in which the first save is through EMU_RUN_HACK
var EMU_RUN_HACK_SAVE_FIRST_TIME_TBA_HI = 0 //for interrupted restore in which the first save is through EMU_RUN_HACK
var SAVE_LDS = 1
var WG_BASE_ADDR_LO = 0x9000a000
var WG_BASE_ADDR_HI = 0x0
var WAVE_SPACE = 0x5000 //memory size that each wave occupies in workgroup state mem
var CTX_SAVE_CONTROL = 0x0
var CTX_RESTORE_CONTROL = CTX_SAVE_CONTROL
var SIM_RUN_HACK = 0 //any hack that needs to be made to run this code in SIM (either because various RTL code are not ready or no compute save & restore in RTL run)
var SGPR_SAVE_USE_SQC = 1 //use SQC D$ to do the write
var USE_MTBUF_INSTEAD_OF_MUBUF = 0 //because TC EMU currently asserts on 0 of // overload DFMT field to carry 4 more bits of stride for MUBUF opcodes
var SWIZZLE_EN = 0 //whether we use swizzled buffer addressing
/**************************************************************************/
/* variables */
/**************************************************************************/
@ -226,16 +154,7 @@ shader main
type(CS)
if ((EMU_RUN_HACK) && (!EMU_RUN_HACK_RESTORE_NORMAL)) //hack to use trap_id for determining save/restore
//FIXME VCCZ un-init assertion s_getreg_b32 s_save_status, hwreg(HW_REG_STATUS) //save STATUS since we will change SCC
s_and_b32 s_save_tmp, s_save_pc_hi, 0xffff0000 //change SCC
s_cmp_eq_u32 s_save_tmp, 0x007e0000 //Save: trap_id = 0x7e. Restore: trap_id = 0x7f.
s_cbranch_scc0 L_JUMP_TO_RESTORE //do not need to recover STATUS here since we are going to RESTORE
//FIXME s_setreg_b32 hwreg(HW_REG_STATUS), s_save_status //need to recover STATUS since we are going to SAVE
s_branch L_SKIP_RESTORE //NOT restore, SAVE actually
else
s_branch L_SKIP_RESTORE //NOT restore. might be a regular trap or save
end
L_JUMP_TO_RESTORE:
s_branch L_RESTORE //restore
@ -249,7 +168,7 @@ L_SKIP_RESTORE:
s_cbranch_scc1 L_SAVE //this is the operation for save
// ********* Handle non-CWSR traps *******************
if (!EMU_RUN_HACK)
/* read tba and tma for next level trap handler, ttmp4 is used as s_save_status */
s_load_dwordx4 [ttmp8,ttmp9,ttmp10, ttmp11], [tma_lo,tma_hi], 0
s_waitcnt lgkmcnt(0)
@ -268,7 +187,7 @@ L_EXCP_CASE:
s_and_b32 ttmp1, ttmp1, 0xFFFF
set_status_without_spi_prio(s_save_status, ttmp2) //restore HW status(SCC)
s_rfe_b64 [ttmp0, ttmp1]
end
// ********* End handling of non-CWSR traps *******************
/**************************************************************************/
@ -276,12 +195,6 @@ end
/**************************************************************************/
L_SAVE:
if G8SR_DEBUG_TIMESTAMP
s_memrealtime s_g8sr_ts_save_s
s_waitcnt lgkmcnt(0) //FIXME, will cause xnack??
end
s_mov_b32 s_save_tmp, 0 //clear saveCtx bit
s_setreg_b32 hwreg(HW_REG_TRAPSTS, SQ_WAVE_TRAPSTS_SAVECTX_SHIFT, 1), s_save_tmp //clear saveCtx bit
@ -303,16 +216,7 @@ end
s_mov_b32 s_save_exec_hi, exec_hi
s_mov_b64 exec, 0x0 //clear EXEC to get ready to receive
if G8SR_DEBUG_TIMESTAMP
s_memrealtime s_g8sr_ts_sq_save_msg
s_waitcnt lgkmcnt(0)
end
if (EMU_RUN_HACK)
else
s_sendmsg sendmsg(MSG_SAVEWAVE) //send SPI a message and wait for SPI's write to EXEC
end
// Set SPI_PRIO=2 to avoid starving instruction fetch in the waves we're waiting for.
s_or_b32 s_save_tmp, s_save_status, (2 << SQ_WAVE_STATUS_SPI_PRIO_SHIFT)
@ -321,36 +225,9 @@ end
L_SLEEP:
s_sleep 0x2 // sleep 1 (64clk) is not enough for 8 waves per SIMD, which will cause SQ hang, since the 7,8th wave could not get arbit to exec inst, while other waves are stuck into the sleep-loop and waiting for wrexec!=0
if (EMU_RUN_HACK)
else
s_cbranch_execz L_SLEEP
end
if G8SR_DEBUG_TIMESTAMP
s_memrealtime s_g8sr_ts_spi_wrexec
s_waitcnt lgkmcnt(0)
end
/* setup Resource Contants */
if ((EMU_RUN_HACK) && (!EMU_RUN_HACK_SAVE_SINGLE_WAVE))
//calculate wd_addr using absolute thread id
v_readlane_b32 s_save_tmp, v9, 0
s_lshr_b32 s_save_tmp, s_save_tmp, 6
s_mul_i32 s_save_tmp, s_save_tmp, WAVE_SPACE
s_add_i32 s_save_spi_init_lo, s_save_tmp, WG_BASE_ADDR_LO
s_mov_b32 s_save_spi_init_hi, WG_BASE_ADDR_HI
s_and_b32 s_save_spi_init_hi, s_save_spi_init_hi, CTX_SAVE_CONTROL
else
end
if ((EMU_RUN_HACK) && (EMU_RUN_HACK_SAVE_SINGLE_WAVE))
s_add_i32 s_save_spi_init_lo, s_save_tmp, WG_BASE_ADDR_LO
s_mov_b32 s_save_spi_init_hi, WG_BASE_ADDR_HI
s_and_b32 s_save_spi_init_hi, s_save_spi_init_hi, CTX_SAVE_CONTROL
else
end
s_mov_b32 s_save_buf_rsrc0, s_save_spi_init_lo //base_addr_lo
s_and_b32 s_save_buf_rsrc1, s_save_spi_init_hi, 0x0000FFFF //base_addr_hi
s_or_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, S_SAVE_BUF_RSRC_WORD1_STRIDE
@ -383,22 +260,10 @@ end
s_mov_b32 s_save_buf_rsrc2, 0x4 //NUM_RECORDS in bytes
if (SWIZZLE_EN)
s_add_u32 s_save_buf_rsrc2, s_save_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
write_hwreg_to_mem(s_save_m0, s_save_buf_rsrc0, s_save_mem_offset) //M0
if ((EMU_RUN_HACK) && (EMU_RUN_HACK_SAVE_FIRST_TIME))
s_add_u32 s_save_pc_lo, s_save_pc_lo, 4 //pc[31:0]+4
s_addc_u32 s_save_pc_hi, s_save_pc_hi, 0x0 //carry bit over
s_mov_b32 tba_lo, EMU_RUN_HACK_SAVE_FIRST_TIME_TBA_LO
s_mov_b32 tba_hi, EMU_RUN_HACK_SAVE_FIRST_TIME_TBA_HI
end
write_hwreg_to_mem(s_save_pc_lo, s_save_buf_rsrc0, s_save_mem_offset) //PC
write_hwreg_to_mem(s_save_pc_hi, s_save_buf_rsrc0, s_save_mem_offset)
write_hwreg_to_mem(s_save_exec_lo, s_save_buf_rsrc0, s_save_mem_offset) //EXEC
@ -440,18 +305,8 @@ end
s_add_u32 s_save_alloc_size, s_save_alloc_size, 1
s_lshl_b32 s_save_alloc_size, s_save_alloc_size, 4 //Number of SGPRs = (sgpr_size + 1) * 16 (non-zero value)
if (SGPR_SAVE_USE_SQC)
s_lshl_b32 s_save_buf_rsrc2, s_save_alloc_size, 2 //NUM_RECORDS in bytes
else
s_lshl_b32 s_save_buf_rsrc2, s_save_alloc_size, 8 //NUM_RECORDS in bytes (64 threads)
end
if (SWIZZLE_EN)
s_add_u32 s_save_buf_rsrc2, s_save_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
// backup s_save_buf_rsrc0,1 to s_save_pc_lo/hi, since write_16sgpr_to_mem function will change the rsrc0
//s_mov_b64 s_save_pc_lo, s_save_buf_rsrc0
@ -490,30 +345,14 @@ end
s_mov_b32 exec_lo, 0xFFFFFFFF //need every thread from now on
s_mov_b32 exec_hi, 0xFFFFFFFF
if (SWIZZLE_EN)
s_add_u32 s_save_buf_rsrc2, s_save_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
// VGPR Allocated in 4-GPR granularity
if G8SR_VGPR_SR_IN_DWX4
// the const stride for DWx4 is 4*4 bytes
s_and_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, 0x0000FFFF // reset const stride to 0
s_or_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, G8SR_SAVE_BUF_RSRC_WORD1_STRIDE_DWx4 // const stride to 4*4 bytes
buffer_store_dwordx4 v0, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1
s_and_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, 0x0000FFFF // reset const stride to 0
s_or_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, S_SAVE_BUF_RSRC_WORD1_STRIDE // reset const stride to 4 bytes
else
buffer_store_dword v0, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1
buffer_store_dword v1, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1 offset:256
buffer_store_dword v2, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1 offset:256*2
buffer_store_dword v3, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1 offset:256*3
end
@ -549,64 +388,10 @@ end
s_add_u32 s_save_mem_offset, s_save_mem_offset, get_hwreg_size_bytes()
if (SWIZZLE_EN)
s_add_u32 s_save_buf_rsrc2, s_save_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
s_mov_b32 m0, 0x0 //lds_offset initial value = 0
var LDS_DMA_ENABLE = 0
var UNROLL = 0
if UNROLL==0 && LDS_DMA_ENABLE==1
s_mov_b32 s3, 256*2
s_nop 0
s_nop 0
s_nop 0
L_SAVE_LDS_LOOP:
//TODO: looks the 2 buffer_store/load clause for s/r will hurt performance.???
if (SAVE_LDS) //SPI always alloc LDS space in 128DW granularity
buffer_store_lds_dword s_save_buf_rsrc0, s_save_mem_offset lds:1 // first 64DW
buffer_store_lds_dword s_save_buf_rsrc0, s_save_mem_offset lds:1 offset:256 // second 64DW
end
s_add_u32 m0, m0, s3 //every buffer_store_lds does 256 bytes
s_add_u32 s_save_mem_offset, s_save_mem_offset, s3 //mem offset increased by 256 bytes
s_cmp_lt_u32 m0, s_save_alloc_size //scc=(m0 < s_save_alloc_size) ? 1 : 0
s_cbranch_scc1 L_SAVE_LDS_LOOP //LDS save is complete?
elsif LDS_DMA_ENABLE==1 && UNROLL==1 // UNROOL , has ichace miss
// store from higest LDS address to lowest
s_mov_b32 s3, 256*2
s_sub_u32 m0, s_save_alloc_size, s3
s_add_u32 s_save_mem_offset, s_save_mem_offset, m0
s_lshr_b32 s_save_alloc_size, s_save_alloc_size, 9 // how many 128 trunks...
s_sub_u32 s_save_alloc_size, 128, s_save_alloc_size // store from higheset addr to lowest
s_mul_i32 s_save_alloc_size, s_save_alloc_size, 6*4 // PC offset increment, each LDS save block cost 6*4 Bytes instruction
s_add_u32 s_save_alloc_size, s_save_alloc_size, 3*4 //2is the below 2 inst...//s_addc and s_setpc
s_nop 0
s_nop 0
s_nop 0 //pad 3 dw to let LDS_DMA align with 64Bytes
s_getpc_b64 s[0:1] // reuse s[0:1], since s[0:1] already saved
s_add_u32 s0, s0,s_save_alloc_size
s_addc_u32 s1, s1, 0
s_setpc_b64 s[0:1]
for var i =0; i< 128; i++
// be careful to make here a 64Byte aligned address, which could improve performance...
buffer_store_lds_dword s_save_buf_rsrc0, s_save_mem_offset lds:1 offset:0 // first 64DW
buffer_store_lds_dword s_save_buf_rsrc0, s_save_mem_offset lds:1 offset:256 // second 64DW
if i!=127
s_sub_u32 m0, m0, s3 // use a sgpr to shrink 2DW-inst to 1DW inst to improve performance , i.e. pack more LDS_DMA inst to one Cacheline
s_sub_u32 s_save_mem_offset, s_save_mem_offset, s3
end
end
else // BUFFER_STORE
v_mbcnt_lo_u32_b32 v2, 0xffffffff, 0x0
v_mbcnt_hi_u32_b32 v3, 0xffffffff, v2 // tid
v_mul_i32_i24 v2, v3, 8 // tid*8
@ -628,8 +413,6 @@ L_SAVE_LDS_LOOP_VECTOR:
// restore rsrc3
s_mov_b32 s_save_buf_rsrc3, s0
end
L_SAVE_LDS_DONE:
@ -647,44 +430,8 @@ L_SAVE_LDS_DONE:
s_add_u32 s_save_alloc_size, s_save_alloc_size, 1
s_lshl_b32 s_save_alloc_size, s_save_alloc_size, 2 //Number of VGPRs = (vgpr_size + 1) * 4 (non-zero value) //FIXME for GFX, zero is possible
s_lshl_b32 s_save_buf_rsrc2, s_save_alloc_size, 8 //NUM_RECORDS in bytes (64 threads*4)
if (SWIZZLE_EN)
s_add_u32 s_save_buf_rsrc2, s_save_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
// VGPR Allocated in 4-GPR granularity
if G8SR_VGPR_SR_IN_DWX4
// the const stride for DWx4 is 4*4 bytes
s_and_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, 0x0000FFFF // reset const stride to 0
s_or_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, G8SR_SAVE_BUF_RSRC_WORD1_STRIDE_DWx4 // const stride to 4*4 bytes
s_mov_b32 m0, 4 // skip first 4 VGPRs
s_cmp_lt_u32 m0, s_save_alloc_size
s_cbranch_scc0 L_SAVE_VGPR_LOOP_END // no more vgprs
s_set_gpr_idx_on m0, 0x1 // This will change M0
s_add_u32 s_save_alloc_size, s_save_alloc_size, 0x1000 // because above inst change m0
L_SAVE_VGPR_LOOP:
v_mov_b32 v0, v0 // v0 = v[0+m0]
v_mov_b32 v1, v1
v_mov_b32 v2, v2
v_mov_b32 v3, v3
buffer_store_dwordx4 v0, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1
s_add_u32 m0, m0, 4
s_add_u32 s_save_mem_offset, s_save_mem_offset, 256*4
s_cmp_lt_u32 m0, s_save_alloc_size
s_cbranch_scc1 L_SAVE_VGPR_LOOP //VGPR save is complete?
s_set_gpr_idx_off
L_SAVE_VGPR_LOOP_END:
s_and_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, 0x0000FFFF // reset const stride to 0
s_or_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, S_SAVE_BUF_RSRC_WORD1_STRIDE // reset const stride to 4 bytes
else
// VGPR store using dw burst
s_mov_b32 m0, 0x4 //VGPR initial index value =0
s_cmp_lt_u32 m0, s_save_alloc_size
@ -700,52 +447,18 @@ else
v_mov_b32 v2, v2 //v0 = v[0+m0]
v_mov_b32 v3, v3 //v0 = v[0+m0]
if(USE_MTBUF_INSTEAD_OF_MUBUF)
tbuffer_store_format_x v0, v0, s_save_buf_rsrc0, s_save_mem_offset format:BUF_NUM_FORMAT_FLOAT format: BUF_DATA_FORMAT_32 slc:1 glc:1
else
buffer_store_dword v0, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1
buffer_store_dword v1, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1 offset:256
buffer_store_dword v2, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1 offset:256*2
buffer_store_dword v3, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1 offset:256*3
end
s_add_u32 m0, m0, 4 //next vgpr index
s_add_u32 s_save_mem_offset, s_save_mem_offset, 256*4 //every buffer_store_dword does 256 bytes
s_cmp_lt_u32 m0, s_save_alloc_size //scc = (m0 < s_save_alloc_size) ? 1 : 0
s_cbranch_scc1 L_SAVE_VGPR_LOOP //VGPR save is complete?
s_set_gpr_idx_off
end
L_SAVE_VGPR_END:
/* S_PGM_END_SAVED */ //FIXME graphics ONLY
if ((EMU_RUN_HACK) && (!EMU_RUN_HACK_SAVE_NORMAL_EXIT))
s_and_b32 s_save_pc_hi, s_save_pc_hi, 0x0000ffff //pc[47:32]
s_add_u32 s_save_pc_lo, s_save_pc_lo, 4 //pc[31:0]+4
s_addc_u32 s_save_pc_hi, s_save_pc_hi, 0x0 //carry bit over
s_rfe_b64 s_save_pc_lo //Return to the main shader program
else
end
// Save Done timestamp
if G8SR_DEBUG_TIMESTAMP
s_memrealtime s_g8sr_ts_save_d
// SGPR SR memory offset : size(VGPR)
get_vgpr_size_bytes(s_save_mem_offset)
s_add_u32 s_save_mem_offset, s_save_mem_offset, G8SR_DEBUG_TS_SAVE_D_OFFSET
s_waitcnt lgkmcnt(0) //FIXME, will cause xnack??
// Need reset rsrc2??
s_mov_b32 m0, s_save_mem_offset
s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
s_buffer_store_dwordx2 s_g8sr_ts_save_d, s_save_buf_rsrc0, m0 glc:1
end
s_branch L_END_PGM
@ -756,27 +469,6 @@ end
L_RESTORE:
/* Setup Resource Contants */
if ((EMU_RUN_HACK) && (!EMU_RUN_HACK_RESTORE_NORMAL))
//calculate wd_addr using absolute thread id
v_readlane_b32 s_restore_tmp, v9, 0
s_lshr_b32 s_restore_tmp, s_restore_tmp, 6
s_mul_i32 s_restore_tmp, s_restore_tmp, WAVE_SPACE
s_add_i32 s_restore_spi_init_lo, s_restore_tmp, WG_BASE_ADDR_LO
s_mov_b32 s_restore_spi_init_hi, WG_BASE_ADDR_HI
s_and_b32 s_restore_spi_init_hi, s_restore_spi_init_hi, CTX_RESTORE_CONTROL
else
end
if G8SR_DEBUG_TIMESTAMP
s_memrealtime s_g8sr_ts_restore_s
s_waitcnt lgkmcnt(0) //FIXME, will cause xnack??
// tma_lo/hi are sgpr 110, 111, which will not used for 112 SGPR allocated case...
s_mov_b32 s_restore_pc_lo, s_g8sr_ts_restore_s[0]
s_mov_b32 s_restore_pc_hi, s_g8sr_ts_restore_s[1] //backup ts to ttmp0/1, sicne exec will be finally restored..
end
s_mov_b32 s_restore_buf_rsrc0, s_restore_spi_init_lo //base_addr_lo
s_and_b32 s_restore_buf_rsrc1, s_restore_spi_init_hi, 0x0000FFFF //base_addr_hi
s_or_b32 s_restore_buf_rsrc1, s_restore_buf_rsrc1, S_RESTORE_BUF_RSRC_WORD1_STRIDE
@ -818,18 +510,12 @@ end
s_add_u32 s_restore_mem_offset, s_restore_mem_offset, get_hwreg_size_bytes() //FIXME, Check if offset overflow???
if (SWIZZLE_EN)
s_add_u32 s_restore_buf_rsrc2, s_restore_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_restore_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
s_mov_b32 m0, 0x0 //lds_offset initial value = 0
L_RESTORE_LDS_LOOP:
if (SAVE_LDS)
buffer_load_dword v0, v0, s_restore_buf_rsrc0, s_restore_mem_offset lds:1 // first 64DW
buffer_load_dword v0, v0, s_restore_buf_rsrc0, s_restore_mem_offset lds:1 offset:256 // second 64DW
end
s_add_u32 m0, m0, 256*2 // 128 DW
s_add_u32 s_restore_mem_offset, s_restore_mem_offset, 256*2 //mem offset increased by 128DW
s_cmp_lt_u32 m0, s_restore_alloc_size //scc=(m0 < s_restore_alloc_size) ? 1 : 0
@ -848,40 +534,8 @@ end
s_add_u32 s_restore_alloc_size, s_restore_alloc_size, 1
s_lshl_b32 s_restore_alloc_size, s_restore_alloc_size, 2 //Number of VGPRs = (vgpr_size + 1) * 4 (non-zero value)
s_lshl_b32 s_restore_buf_rsrc2, s_restore_alloc_size, 8 //NUM_RECORDS in bytes (64 threads*4)
if (SWIZZLE_EN)
s_add_u32 s_restore_buf_rsrc2, s_restore_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_restore_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
if G8SR_VGPR_SR_IN_DWX4
get_vgpr_size_bytes(s_restore_mem_offset)
s_sub_u32 s_restore_mem_offset, s_restore_mem_offset, 256*4
// the const stride for DWx4 is 4*4 bytes
s_and_b32 s_restore_buf_rsrc1, s_restore_buf_rsrc1, 0x0000FFFF // reset const stride to 0
s_or_b32 s_restore_buf_rsrc1, s_restore_buf_rsrc1, G8SR_RESTORE_BUF_RSRC_WORD1_STRIDE_DWx4 // const stride to 4*4 bytes
s_mov_b32 m0, s_restore_alloc_size
s_set_gpr_idx_on m0, 0x8 // Note.. This will change m0
L_RESTORE_VGPR_LOOP:
buffer_load_dwordx4 v0, v0, s_restore_buf_rsrc0, s_restore_mem_offset slc:1 glc:1
s_waitcnt vmcnt(0)
s_sub_u32 m0, m0, 4
v_mov_b32 v0, v0 // v[0+m0] = v0
v_mov_b32 v1, v1
v_mov_b32 v2, v2
v_mov_b32 v3, v3
s_sub_u32 s_restore_mem_offset, s_restore_mem_offset, 256*4
s_cmp_eq_u32 m0, 0x8000
s_cbranch_scc0 L_RESTORE_VGPR_LOOP
s_set_gpr_idx_off
s_and_b32 s_restore_buf_rsrc1, s_restore_buf_rsrc1, 0x0000FFFF // reset const stride to 0
s_or_b32 s_restore_buf_rsrc1, s_restore_buf_rsrc1, S_RESTORE_BUF_RSRC_WORD1_STRIDE // const stride to 4*4 bytes
else
// VGPR load using dw burst
s_mov_b32 s_restore_mem_offset_save, s_restore_mem_offset // restore start with v1, v0 will be the last
s_add_u32 s_restore_mem_offset, s_restore_mem_offset, 256*4
@ -890,14 +544,10 @@ else
s_add_u32 s_restore_alloc_size, s_restore_alloc_size, 0x8000 //add 0x8000 since we compare m0 against it later
L_RESTORE_VGPR_LOOP:
if(USE_MTBUF_INSTEAD_OF_MUBUF)
tbuffer_load_format_x v0, v0, s_restore_buf_rsrc0, s_restore_mem_offset format:BUF_NUM_FORMAT_FLOAT format: BUF_DATA_FORMAT_32 slc:1 glc:1
else
buffer_load_dword v0, v0, s_restore_buf_rsrc0, s_restore_mem_offset slc:1 glc:1
buffer_load_dword v1, v0, s_restore_buf_rsrc0, s_restore_mem_offset slc:1 glc:1 offset:256
buffer_load_dword v2, v0, s_restore_buf_rsrc0, s_restore_mem_offset slc:1 glc:1 offset:256*2
buffer_load_dword v3, v0, s_restore_buf_rsrc0, s_restore_mem_offset slc:1 glc:1 offset:256*3
end
s_waitcnt vmcnt(0) //ensure data ready
v_mov_b32 v0, v0 //v[0+m0] = v0
v_mov_b32 v1, v1
@ -909,16 +559,10 @@ else
s_cbranch_scc1 L_RESTORE_VGPR_LOOP //VGPR restore (except v0) is complete?
s_set_gpr_idx_off
/* VGPR restore on v0 */
if(USE_MTBUF_INSTEAD_OF_MUBUF)
tbuffer_load_format_x v0, v0, s_restore_buf_rsrc0, s_restore_mem_offset_save format:BUF_NUM_FORMAT_FLOAT format: BUF_DATA_FORMAT_32 slc:1 glc:1
else
buffer_load_dword v0, v0, s_restore_buf_rsrc0, s_restore_mem_offset_save slc:1 glc:1
buffer_load_dword v1, v0, s_restore_buf_rsrc0, s_restore_mem_offset_save slc:1 glc:1 offset:256
buffer_load_dword v2, v0, s_restore_buf_rsrc0, s_restore_mem_offset_save slc:1 glc:1 offset:256*2
buffer_load_dword v3, v0, s_restore_buf_rsrc0, s_restore_mem_offset_save slc:1 glc:1 offset:256*3
end
end
/* restore SGPRs */
//////////////////////////////
@ -934,16 +578,8 @@ end
s_add_u32 s_restore_alloc_size, s_restore_alloc_size, 1
s_lshl_b32 s_restore_alloc_size, s_restore_alloc_size, 4 //Number of SGPRs = (sgpr_size + 1) * 16 (non-zero value)
if (SGPR_SAVE_USE_SQC)
s_lshl_b32 s_restore_buf_rsrc2, s_restore_alloc_size, 2 //NUM_RECORDS in bytes
else
s_lshl_b32 s_restore_buf_rsrc2, s_restore_alloc_size, 8 //NUM_RECORDS in bytes (64 threads)
end
if (SWIZZLE_EN)
s_add_u32 s_restore_buf_rsrc2, s_restore_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_restore_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
/* If 112 SGPRs ar allocated, 4 sgprs are not used TBA(108,109),TMA(110,111),
However, we are safe to restore these 4 SGPRs anyway, since TBA,TMA will later be restored by HWREG
@ -972,12 +608,6 @@ end
//////////////////////////////
L_RESTORE_HWREG:
if G8SR_DEBUG_TIMESTAMP
s_mov_b32 s_g8sr_ts_restore_s[0], s_restore_pc_lo
s_mov_b32 s_g8sr_ts_restore_s[1], s_restore_pc_hi
end
// HWREG SR memory offset : size(VGPR)+size(SGPR)
get_vgpr_size_bytes(s_restore_mem_offset)
get_sgpr_size_bytes(s_restore_tmp)
@ -985,11 +615,7 @@ end
s_mov_b32 s_restore_buf_rsrc2, 0x4 //NUM_RECORDS in bytes
if (SWIZZLE_EN)
s_add_u32 s_restore_buf_rsrc2, s_restore_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_restore_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
read_hwreg_from_mem(s_restore_m0, s_restore_buf_rsrc0, s_restore_mem_offset) //M0
read_hwreg_from_mem(s_restore_pc_lo, s_restore_buf_rsrc0, s_restore_mem_offset) //PC
@ -1006,16 +632,6 @@ end
s_waitcnt lgkmcnt(0) //from now on, it is safe to restore STATUS and IB_STS
//for normal save & restore, the saved PC points to the next inst to execute, no adjustment needs to be made, otherwise:
if ((EMU_RUN_HACK) && (!EMU_RUN_HACK_RESTORE_NORMAL))
s_add_u32 s_restore_pc_lo, s_restore_pc_lo, 8 //pc[31:0]+8 //two back-to-back s_trap are used (first for save and second for restore)
s_addc_u32 s_restore_pc_hi, s_restore_pc_hi, 0x0 //carry bit over
end
if ((EMU_RUN_HACK) && (EMU_RUN_HACK_RESTORE_NORMAL))
s_add_u32 s_restore_pc_lo, s_restore_pc_lo, 4 //pc[31:0]+4 // save is hack through s_trap but restore is normal
s_addc_u32 s_restore_pc_hi, s_restore_pc_hi, 0x0 //carry bit over
end
s_mov_b32 m0, s_restore_m0
s_mov_b32 exec_lo, s_restore_exec_lo
s_mov_b32 exec_hi, s_restore_exec_hi
@ -1048,11 +664,6 @@ end
s_barrier //barrier to ensure the readiness of LDS before access attempts from any other wave in the same TG //FIXME not performance-optimal at this time
if G8SR_DEBUG_TIMESTAMP
s_memrealtime s_g8sr_ts_restore_d
s_waitcnt lgkmcnt(0)
end
// s_rfe_b64 s_restore_pc_lo //Return to the main shader program and resume execution
s_rfe_restore_b64 s_restore_pc_lo, s_restore_m0 // s_restore_m0[0] is used to set STATUS.inst_atc

375
drivers/gpu/drm/amd/amdkfd/cwsr_trap_handler_gfx9.asm
View file

@ -24,75 +24,6 @@
* PROJECT=greenland ./sp3 cwsr_trap_handler_gfx9.asm -hex tmp.hex
*/
/* HW (GFX9) source code for CWSR trap handler */
/* Version 18 + multiple trap handler */
// this performance-optimal version was originally from Seven Xu at SRDC
// Revison #18 --...
/* Rev History
** #1. Branch from gc dv. //gfxip/gfx9/main/src/test/suites/block/cs/sr/cs_trap_handler.sp3#1,#50, #51, #52-53(Skip, Already Fixed by PV), #54-56(merged),#57-58(mergerd, skiped-already fixed by PV)
** #4. SR Memory Layout:
** 1. VGPR-SGPR-HWREG-{LDS}
** 2. tba_hi.bits.26 - reconfigured as the first wave in tg bits, for defer Save LDS for a threadgroup.. performance concern..
** #5. Update: 1. Accurate g8sr_ts_save_d timestamp
** #6. Update: 1. Fix s_barrier usage; 2. VGPR s/r using swizzle buffer?(NoNeed, already matched the swizzle pattern, more investigation)
** #7. Update: 1. don't barrier if noLDS
** #8. Branch: 1. Branch to ver#0, which is very similar to gc dv version
** 2. Fix SQ issue by s_sleep 2
** #9. Update: 1. Fix scc restore failed issue, restore wave_status at last
** 2. optimize s_buffer save by burst 16sgprs...
** #10. Update 1. Optimize restore sgpr by busrt 16 sgprs.
** #11. Update 1. Add 2 more timestamp for debug version
** #12. Update 1. Add VGPR SR using DWx4, some case improve and some case drop performance
** #13. Integ 1. Always use MUBUF for PV trap shader...
** #14. Update 1. s_buffer_store soft clause...
** #15. Update 1. PERF - sclar write with glc:0/mtype0 to allow L2 combine. perf improvement a lot.
** #16. Update 1. PRRF - UNROLL LDS_DMA got 2500cycle save in IP tree
** #17. Update 1. FUNC - LDS_DMA has issues while ATC, replace with ds_read/buffer_store for save part[TODO restore part]
** 2. PERF - Save LDS before save VGPR to cover LDS save long latency...
** #18. Update 1. FUNC - Implicitly estore STATUS.VCCZ, which is not writable by s_setreg_b32
** 2. FUNC - Handle non-CWSR traps
*/
var G8SR_WDMEM_HWREG_OFFSET = 0
var G8SR_WDMEM_SGPR_OFFSET = 128 // in bytes
// Keep definition same as the app shader, These 2 time stamps are part of the app shader... Should before any Save and after restore.
var G8SR_DEBUG_TIMESTAMP = 0
var G8SR_DEBUG_TS_SAVE_D_OFFSET = 40*4 // ts_save_d timestamp offset relative to SGPR_SR_memory_offset
var s_g8sr_ts_save_s = s[34:35] // save start
var s_g8sr_ts_sq_save_msg = s[36:37] // The save shader send SAVEWAVE msg to spi
var s_g8sr_ts_spi_wrexec = s[38:39] // the SPI write the sr address to SQ
var s_g8sr_ts_save_d = s[40:41] // save end
var s_g8sr_ts_restore_s = s[42:43] // restore start
var s_g8sr_ts_restore_d = s[44:45] // restore end
var G8SR_VGPR_SR_IN_DWX4 = 0
var G8SR_SAVE_BUF_RSRC_WORD1_STRIDE_DWx4 = 0x00100000 // DWx4 stride is 4*4Bytes
var G8SR_RESTORE_BUF_RSRC_WORD1_STRIDE_DWx4 = G8SR_SAVE_BUF_RSRC_WORD1_STRIDE_DWx4
/*************************************************************************/
/* control on how to run the shader */
/*************************************************************************/
//any hack that needs to be made to run this code in EMU (either because various EMU code are not ready or no compute save & restore in EMU run)
var EMU_RUN_HACK = 0
var EMU_RUN_HACK_RESTORE_NORMAL = 0
var EMU_RUN_HACK_SAVE_NORMAL_EXIT = 0
var EMU_RUN_HACK_SAVE_SINGLE_WAVE = 0
var EMU_RUN_HACK_SAVE_FIRST_TIME = 0 //for interrupted restore in which the first save is through EMU_RUN_HACK
var SAVE_LDS = 1
var WG_BASE_ADDR_LO = 0x9000a000
var WG_BASE_ADDR_HI = 0x0
var WAVE_SPACE = 0x5000 //memory size that each wave occupies in workgroup state mem
var CTX_SAVE_CONTROL = 0x0
var CTX_RESTORE_CONTROL = CTX_SAVE_CONTROL
var SIM_RUN_HACK = 0 //any hack that needs to be made to run this code in SIM (either because various RTL code are not ready or no compute save & restore in RTL run)
var SGPR_SAVE_USE_SQC = 1 //use SQC D$ to do the write
var USE_MTBUF_INSTEAD_OF_MUBUF = 0 //because TC EMU currently asserts on 0 of // overload DFMT field to carry 4 more bits of stride for MUBUF opcodes
var SWIZZLE_EN = 0 //whether we use swizzled buffer addressing
var ACK_SQC_STORE = 1 //workaround for suspected SQC store bug causing incorrect stores under concurrency
var SAVE_AFTER_XNACK_ERROR = 1 //workaround for TCP store failure after XNACK error when ALLOW_REPLAY=0, for debugger
var SINGLE_STEP_MISSED_WORKAROUND = 1 //workaround for lost MODE.DEBUG_EN exception when SAVECTX raised
@ -238,16 +169,7 @@ shader main
type(CS)
if ((EMU_RUN_HACK) && (!EMU_RUN_HACK_RESTORE_NORMAL)) //hack to use trap_id for determining save/restore
//FIXME VCCZ un-init assertion s_getreg_b32 s_save_status, hwreg(HW_REG_STATUS) //save STATUS since we will change SCC
s_and_b32 s_save_tmp, s_save_pc_hi, 0xffff0000 //change SCC
s_cmp_eq_u32 s_save_tmp, 0x007e0000 //Save: trap_id = 0x7e. Restore: trap_id = 0x7f.
s_cbranch_scc0 L_JUMP_TO_RESTORE //do not need to recover STATUS here since we are going to RESTORE
//FIXME s_setreg_b32 hwreg(HW_REG_STATUS), s_save_status //need to recover STATUS since we are going to SAVE
s_branch L_SKIP_RESTORE //NOT restore, SAVE actually
else
s_branch L_SKIP_RESTORE //NOT restore. might be a regular trap or save
end
L_JUMP_TO_RESTORE:
s_branch L_RESTORE //restore
@ -278,7 +200,7 @@ end
s_cbranch_scc1 L_SAVE //this is the operation for save
// ********* Handle non-CWSR traps *******************
if (!EMU_RUN_HACK)
// Illegal instruction is a non-maskable exception which blocks context save.
// Halt the wavefront and return from the trap.
s_and_b32 ttmp2, s_save_trapsts, SQ_WAVE_TRAPSTS_ILLEGAL_INST_MASK
@ -355,7 +277,7 @@ L_EXCP_CASE:
set_status_without_spi_prio(s_save_status, ttmp2)
s_rfe_b64 [ttmp0, ttmp1]
end
// ********* End handling of non-CWSR traps *******************
/**************************************************************************/
@ -363,12 +285,6 @@ end
/**************************************************************************/
L_SAVE:
if G8SR_DEBUG_TIMESTAMP
s_memrealtime s_g8sr_ts_save_s
s_waitcnt lgkmcnt(0) //FIXME, will cause xnack??
end
s_and_b32 s_save_pc_hi, s_save_pc_hi, 0x0000ffff //pc[47:32]
s_mov_b32 s_save_tmp, 0 //clear saveCtx bit
@ -390,16 +306,7 @@ end
s_mov_b32 s_save_exec_hi, exec_hi
s_mov_b64 exec, 0x0 //clear EXEC to get ready to receive
if G8SR_DEBUG_TIMESTAMP
s_memrealtime s_g8sr_ts_sq_save_msg
s_waitcnt lgkmcnt(0)
end
if (EMU_RUN_HACK)
else
s_sendmsg sendmsg(MSG_SAVEWAVE) //send SPI a message and wait for SPI's write to EXEC
end
// Set SPI_PRIO=2 to avoid starving instruction fetch in the waves we're waiting for.
s_or_b32 s_save_tmp, s_save_status, (2 << SQ_WAVE_STATUS_SPI_PRIO_SHIFT)
@ -408,33 +315,7 @@ end
L_SLEEP:
s_sleep 0x2 // sleep 1 (64clk) is not enough for 8 waves per SIMD, which will cause SQ hang, since the 7,8th wave could not get arbit to exec inst, while other waves are stuck into the sleep-loop and waiting for wrexec!=0
if (EMU_RUN_HACK)
else
s_cbranch_execz L_SLEEP
end
if G8SR_DEBUG_TIMESTAMP
s_memrealtime s_g8sr_ts_spi_wrexec
s_waitcnt lgkmcnt(0)
end
if ((EMU_RUN_HACK) && (!EMU_RUN_HACK_SAVE_SINGLE_WAVE))
//calculate wd_addr using absolute thread id
v_readlane_b32 s_save_tmp, v9, 0
s_lshr_b32 s_save_tmp, s_save_tmp, 6
s_mul_i32 s_save_tmp, s_save_tmp, WAVE_SPACE
s_add_i32 s_save_spi_init_lo, s_save_tmp, WG_BASE_ADDR_LO
s_mov_b32 s_save_spi_init_hi, WG_BASE_ADDR_HI
s_and_b32 s_save_spi_init_hi, s_save_spi_init_hi, CTX_SAVE_CONTROL
else
end
if ((EMU_RUN_HACK) && (EMU_RUN_HACK_SAVE_SINGLE_WAVE))
s_add_i32 s_save_spi_init_lo, s_save_tmp, WG_BASE_ADDR_LO
s_mov_b32 s_save_spi_init_hi, WG_BASE_ADDR_HI
s_and_b32 s_save_spi_init_hi, s_save_spi_init_hi, CTX_SAVE_CONTROL
else
end
// Save trap temporaries 4-11, 13 initialized by SPI debug dispatch logic
// ttmp SR memory offset : size(VGPR)+size(SGPR)+0x40
@ -484,20 +365,10 @@ end
s_mov_b32 s_save_buf_rsrc2, 0x4 //NUM_RECORDS in bytes
if (SWIZZLE_EN)
s_add_u32 s_save_buf_rsrc2, s_save_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
write_hwreg_to_mem(s_save_m0, s_save_buf_rsrc0, s_save_mem_offset) //M0
if ((EMU_RUN_HACK) && (EMU_RUN_HACK_SAVE_FIRST_TIME))
s_add_u32 s_save_pc_lo, s_save_pc_lo, 4 //pc[31:0]+4
s_addc_u32 s_save_pc_hi, s_save_pc_hi, 0x0 //carry bit over
end
write_hwreg_to_mem(s_save_pc_lo, s_save_buf_rsrc0, s_save_mem_offset) //PC
write_hwreg_to_mem(s_save_pc_hi, s_save_buf_rsrc0, s_save_mem_offset)
write_hwreg_to_mem(s_save_exec_lo, s_save_buf_rsrc0, s_save_mem_offset) //EXEC
@ -535,17 +406,9 @@ end
s_add_u32 s_save_alloc_size, s_save_alloc_size, 1
s_lshl_b32 s_save_alloc_size, s_save_alloc_size, 4 //Number of SGPRs = (sgpr_size + 1) * 16 (non-zero value)
if (SGPR_SAVE_USE_SQC)
s_lshl_b32 s_save_buf_rsrc2, s_save_alloc_size, 2 //NUM_RECORDS in bytes
else
s_lshl_b32 s_save_buf_rsrc2, s_save_alloc_size, 8 //NUM_RECORDS in bytes (64 threads)
end
if (SWIZZLE_EN)
s_add_u32 s_save_buf_rsrc2, s_save_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
// backup s_save_buf_rsrc0,1 to s_save_pc_lo/hi, since write_16sgpr_to_mem function will change the rsrc0
@ -588,25 +451,11 @@ end
s_mov_b32 xnack_mask_lo, 0x0
s_mov_b32 xnack_mask_hi, 0x0
if (SWIZZLE_EN)
s_add_u32 s_save_buf_rsrc2, s_save_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
// VGPR Allocated in 4-GPR granularity
if G8SR_VGPR_SR_IN_DWX4
// the const stride for DWx4 is 4*4 bytes
s_and_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, 0x0000FFFF // reset const stride to 0
s_or_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, G8SR_SAVE_BUF_RSRC_WORD1_STRIDE_DWx4 // const stride to 4*4 bytes
buffer_store_dwordx4 v0, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1
s_and_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, 0x0000FFFF // reset const stride to 0
s_or_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, S_SAVE_BUF_RSRC_WORD1_STRIDE // reset const stride to 4 bytes
else
if SAVE_AFTER_XNACK_ERROR
check_if_tcp_store_ok()
s_cbranch_scc1 L_SAVE_FIRST_VGPRS_WITH_TCP
@ -621,7 +470,6 @@ end
buffer_store_dword v1, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1 offset:256
buffer_store_dword v2, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1 offset:256*2
buffer_store_dword v3, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1 offset:256*3
end
@ -656,64 +504,11 @@ end
s_add_u32 s_save_mem_offset, s_save_mem_offset, get_hwreg_size_bytes()
if (SWIZZLE_EN)
s_add_u32 s_save_buf_rsrc2, s_save_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
s_mov_b32 m0, 0x0 //lds_offset initial value = 0
var LDS_DMA_ENABLE = 0
var UNROLL = 0
if UNROLL==0 && LDS_DMA_ENABLE==1
s_mov_b32 s3, 256*2
s_nop 0
s_nop 0
s_nop 0
L_SAVE_LDS_LOOP:
//TODO: looks the 2 buffer_store/load clause for s/r will hurt performance.???
if (SAVE_LDS) //SPI always alloc LDS space in 128DW granularity
buffer_store_lds_dword s_save_buf_rsrc0, s_save_mem_offset lds:1 // first 64DW
buffer_store_lds_dword s_save_buf_rsrc0, s_save_mem_offset lds:1 offset:256 // second 64DW
end
s_add_u32 m0, m0, s3 //every buffer_store_lds does 256 bytes
s_add_u32 s_save_mem_offset, s_save_mem_offset, s3 //mem offset increased by 256 bytes
s_cmp_lt_u32 m0, s_save_alloc_size //scc=(m0 < s_save_alloc_size) ? 1 : 0
s_cbranch_scc1 L_SAVE_LDS_LOOP //LDS save is complete?
elsif LDS_DMA_ENABLE==1 && UNROLL==1 // UNROOL , has ichace miss
// store from higest LDS address to lowest
s_mov_b32 s3, 256*2
s_sub_u32 m0, s_save_alloc_size, s3
s_add_u32 s_save_mem_offset, s_save_mem_offset, m0
s_lshr_b32 s_save_alloc_size, s_save_alloc_size, 9 // how many 128 trunks...
s_sub_u32 s_save_alloc_size, 128, s_save_alloc_size // store from higheset addr to lowest
s_mul_i32 s_save_alloc_size, s_save_alloc_size, 6*4 // PC offset increment, each LDS save block cost 6*4 Bytes instruction
s_add_u32 s_save_alloc_size, s_save_alloc_size, 3*4 //2is the below 2 inst...//s_addc and s_setpc
s_nop 0
s_nop 0
s_nop 0 //pad 3 dw to let LDS_DMA align with 64Bytes
s_getpc_b64 s[0:1] // reuse s[0:1], since s[0:1] already saved
s_add_u32 s0, s0,s_save_alloc_size
s_addc_u32 s1, s1, 0
s_setpc_b64 s[0:1]
for var i =0; i< 128; i++
// be careful to make here a 64Byte aligned address, which could improve performance...
buffer_store_lds_dword s_save_buf_rsrc0, s_save_mem_offset lds:1 offset:0 // first 64DW
buffer_store_lds_dword s_save_buf_rsrc0, s_save_mem_offset lds:1 offset:256 // second 64DW
if i!=127
s_sub_u32 m0, m0, s3 // use a sgpr to shrink 2DW-inst to 1DW inst to improve performance , i.e. pack more LDS_DMA inst to one Cacheline
s_sub_u32 s_save_mem_offset, s_save_mem_offset, s3
end
end
else // BUFFER_STORE
v_mbcnt_lo_u32_b32 v2, 0xffffffff, 0x0
v_mbcnt_hi_u32_b32 v3, 0xffffffff, v2 // tid
@ -757,8 +552,6 @@ L_SAVE_LDS_LOOP_VECTOR:
// restore rsrc3
s_mov_b32 s_save_buf_rsrc3, s0
end
L_SAVE_LDS_DONE:
@ -776,44 +569,9 @@ L_SAVE_LDS_DONE:
s_add_u32 s_save_alloc_size, s_save_alloc_size, 1
s_lshl_b32 s_save_alloc_size, s_save_alloc_size, 2 //Number of VGPRs = (vgpr_size + 1) * 4 (non-zero value) //FIXME for GFX, zero is possible
s_lshl_b32 s_save_buf_rsrc2, s_save_alloc_size, 8 //NUM_RECORDS in bytes (64 threads*4)
if (SWIZZLE_EN)
s_add_u32 s_save_buf_rsrc2, s_save_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
// VGPR Allocated in 4-GPR granularity
if G8SR_VGPR_SR_IN_DWX4
// the const stride for DWx4 is 4*4 bytes
s_and_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, 0x0000FFFF // reset const stride to 0
s_or_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, G8SR_SAVE_BUF_RSRC_WORD1_STRIDE_DWx4 // const stride to 4*4 bytes
s_mov_b32 m0, 4 // skip first 4 VGPRs
s_cmp_lt_u32 m0, s_save_alloc_size
s_cbranch_scc0 L_SAVE_VGPR_LOOP_END // no more vgprs
s_set_gpr_idx_on m0, 0x1 // This will change M0
s_add_u32 s_save_alloc_size, s_save_alloc_size, 0x1000 // because above inst change m0
L_SAVE_VGPR_LOOP:
v_mov_b32 v0, v0 // v0 = v[0+m0]
v_mov_b32 v1, v1
v_mov_b32 v2, v2
v_mov_b32 v3, v3
buffer_store_dwordx4 v0, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1
s_add_u32 m0, m0, 4
s_add_u32 s_save_mem_offset, s_save_mem_offset, 256*4
s_cmp_lt_u32 m0, s_save_alloc_size
s_cbranch_scc1 L_SAVE_VGPR_LOOP //VGPR save is complete?
s_set_gpr_idx_off
L_SAVE_VGPR_LOOP_END:
s_and_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, 0x0000FFFF // reset const stride to 0
s_or_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, S_SAVE_BUF_RSRC_WORD1_STRIDE // reset const stride to 4 bytes
else
// VGPR store using dw burst
s_mov_b32 m0, 0x4 //VGPR initial index value =0
s_cmp_lt_u32 m0, s_save_alloc_size
@ -844,21 +602,16 @@ end
v_mov_b32 v2, v2 //v0 = v[0+m0]
v_mov_b32 v3, v3 //v0 = v[0+m0]
if(USE_MTBUF_INSTEAD_OF_MUBUF)
tbuffer_store_format_x v0, v0, s_save_buf_rsrc0, s_save_mem_offset format:BUF_NUM_FORMAT_FLOAT format: BUF_DATA_FORMAT_32 slc:1 glc:1
else
buffer_store_dword v0, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1
buffer_store_dword v1, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1 offset:256
buffer_store_dword v2, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1 offset:256*2
buffer_store_dword v3, v0, s_save_buf_rsrc0, s_save_mem_offset slc:1 glc:1 offset:256*3
end
s_add_u32 m0, m0, 4 //next vgpr index
s_add_u32 s_save_mem_offset, s_save_mem_offset, 256*4 //every buffer_store_dword does 256 bytes
s_cmp_lt_u32 m0, s_save_alloc_size //scc = (m0 < s_save_alloc_size) ? 1 : 0
s_cbranch_scc1 L_SAVE_VGPR_LOOP //VGPR save is complete?
s_set_gpr_idx_off
end
L_SAVE_VGPR_END:
@ -905,29 +658,6 @@ L_SAVE_ACCVGPR_LOOP:
L_SAVE_ACCVGPR_END:
end
/* S_PGM_END_SAVED */ //FIXME graphics ONLY
if ((EMU_RUN_HACK) && (!EMU_RUN_HACK_SAVE_NORMAL_EXIT))
s_and_b32 s_save_pc_hi, s_save_pc_hi, 0x0000ffff //pc[47:32]
s_add_u32 s_save_pc_lo, s_save_pc_lo, 4 //pc[31:0]+4
s_addc_u32 s_save_pc_hi, s_save_pc_hi, 0x0 //carry bit over
s_rfe_b64 s_save_pc_lo //Return to the main shader program
else
end
// Save Done timestamp
if G8SR_DEBUG_TIMESTAMP
s_memrealtime s_g8sr_ts_save_d
// SGPR SR memory offset : size(VGPR)
get_vgpr_size_bytes(s_save_mem_offset)
s_add_u32 s_save_mem_offset, s_save_mem_offset, G8SR_DEBUG_TS_SAVE_D_OFFSET
s_waitcnt lgkmcnt(0) //FIXME, will cause xnack??
// Need reset rsrc2??
s_mov_b32 m0, s_save_mem_offset
s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
s_buffer_store_dwordx2 s_g8sr_ts_save_d, s_save_buf_rsrc0, m0 glc:1
end
s_branch L_END_PGM
@ -938,27 +668,6 @@ end
L_RESTORE:
/* Setup Resource Contants */
if ((EMU_RUN_HACK) && (!EMU_RUN_HACK_RESTORE_NORMAL))
//calculate wd_addr using absolute thread id
v_readlane_b32 s_restore_tmp, v9, 0
s_lshr_b32 s_restore_tmp, s_restore_tmp, 6
s_mul_i32 s_restore_tmp, s_restore_tmp, WAVE_SPACE
s_add_i32 s_restore_spi_init_lo, s_restore_tmp, WG_BASE_ADDR_LO
s_mov_b32 s_restore_spi_init_hi, WG_BASE_ADDR_HI
s_and_b32 s_restore_spi_init_hi, s_restore_spi_init_hi, CTX_RESTORE_CONTROL
else
end
if G8SR_DEBUG_TIMESTAMP
s_memrealtime s_g8sr_ts_restore_s
s_waitcnt lgkmcnt(0) //FIXME, will cause xnack??
// tma_lo/hi are sgpr 110, 111, which will not used for 112 SGPR allocated case...
s_mov_b32 s_restore_pc_lo, s_g8sr_ts_restore_s[0]
s_mov_b32 s_restore_pc_hi, s_g8sr_ts_restore_s[1] //backup ts to ttmp0/1, sicne exec will be finally restored..
end
s_mov_b32 s_restore_buf_rsrc0, s_restore_spi_init_lo //base_addr_lo
s_and_b32 s_restore_buf_rsrc1, s_restore_spi_init_hi, 0x0000FFFF //base_addr_hi
s_or_b32 s_restore_buf_rsrc1, s_restore_buf_rsrc1, S_RESTORE_BUF_RSRC_WORD1_STRIDE
@ -1000,18 +709,12 @@ end
s_add_u32 s_restore_mem_offset, s_restore_mem_offset, get_hwreg_size_bytes() //FIXME, Check if offset overflow???
if (SWIZZLE_EN)
s_add_u32 s_restore_buf_rsrc2, s_restore_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_restore_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
s_mov_b32 m0, 0x0 //lds_offset initial value = 0
L_RESTORE_LDS_LOOP:
if (SAVE_LDS)
buffer_load_dword v0, v0, s_restore_buf_rsrc0, s_restore_mem_offset lds:1 // first 64DW
buffer_load_dword v0, v0, s_restore_buf_rsrc0, s_restore_mem_offset lds:1 offset:256 // second 64DW
end
s_add_u32 m0, m0, 256*2 // 128 DW
s_add_u32 s_restore_mem_offset, s_restore_mem_offset, 256*2 //mem offset increased by 128DW
s_cmp_lt_u32 m0, s_restore_alloc_size //scc=(m0 < s_restore_alloc_size) ? 1 : 0
@ -1035,40 +738,8 @@ if ASIC_TARGET_ARCTURUS
s_mov_b32 s_restore_accvgpr_offset, s_restore_buf_rsrc2 //ACC VGPRs at end of VGPRs
end
if (SWIZZLE_EN)
s_add_u32 s_restore_buf_rsrc2, s_restore_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_restore_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
if G8SR_VGPR_SR_IN_DWX4
get_vgpr_size_bytes(s_restore_mem_offset)
s_sub_u32 s_restore_mem_offset, s_restore_mem_offset, 256*4
// the const stride for DWx4 is 4*4 bytes
s_and_b32 s_restore_buf_rsrc1, s_restore_buf_rsrc1, 0x0000FFFF // reset const stride to 0
s_or_b32 s_restore_buf_rsrc1, s_restore_buf_rsrc1, G8SR_RESTORE_BUF_RSRC_WORD1_STRIDE_DWx4 // const stride to 4*4 bytes
s_mov_b32 m0, s_restore_alloc_size
s_set_gpr_idx_on m0, 0x8 // Note.. This will change m0
L_RESTORE_VGPR_LOOP:
buffer_load_dwordx4 v0, v0, s_restore_buf_rsrc0, s_restore_mem_offset slc:1 glc:1
s_waitcnt vmcnt(0)
s_sub_u32 m0, m0, 4
v_mov_b32 v0, v0 // v[0+m0] = v0
v_mov_b32 v1, v1
v_mov_b32 v2, v2
v_mov_b32 v3, v3
s_sub_u32 s_restore_mem_offset, s_restore_mem_offset, 256*4
s_cmp_eq_u32 m0, 0x8000
s_cbranch_scc0 L_RESTORE_VGPR_LOOP
s_set_gpr_idx_off
s_and_b32 s_restore_buf_rsrc1, s_restore_buf_rsrc1, 0x0000FFFF // reset const stride to 0
s_or_b32 s_restore_buf_rsrc1, s_restore_buf_rsrc1, S_RESTORE_BUF_RSRC_WORD1_STRIDE // const stride to 4*4 bytes
else
// VGPR load using dw burst
s_mov_b32 s_restore_mem_offset_save, s_restore_mem_offset // restore start with v1, v0 will be the last
s_add_u32 s_restore_mem_offset, s_restore_mem_offset, 256*4
@ -1081,9 +752,6 @@ end
s_add_u32 s_restore_alloc_size, s_restore_alloc_size, 0x8000 //add 0x8000 since we compare m0 against it later
L_RESTORE_VGPR_LOOP:
if(USE_MTBUF_INSTEAD_OF_MUBUF)
tbuffer_load_format_x v0, v0, s_restore_buf_rsrc0, s_restore_mem_offset format:BUF_NUM_FORMAT_FLOAT format: BUF_DATA_FORMAT_32 slc:1 glc:1
else
if ASIC_TARGET_ARCTURUS
buffer_load_dword v0, v0, s_restore_buf_rsrc0, s_restore_accvgpr_offset slc:1 glc:1
@ -1102,7 +770,6 @@ end
buffer_load_dword v1, v0, s_restore_buf_rsrc0, s_restore_mem_offset slc:1 glc:1 offset:256
buffer_load_dword v2, v0, s_restore_buf_rsrc0, s_restore_mem_offset slc:1 glc:1 offset:256*2
buffer_load_dword v3, v0, s_restore_buf_rsrc0, s_restore_mem_offset slc:1 glc:1 offset:256*3
end
s_waitcnt vmcnt(0) //ensure data ready
v_mov_b32 v0, v0 //v[0+m0] = v0
v_mov_b32 v1, v1
@ -1126,16 +793,10 @@ if ASIC_TARGET_ARCTURUS
end
end
if(USE_MTBUF_INSTEAD_OF_MUBUF)
tbuffer_load_format_x v0, v0, s_restore_buf_rsrc0, s_restore_mem_offset_save format:BUF_NUM_FORMAT_FLOAT format: BUF_DATA_FORMAT_32 slc:1 glc:1
else
buffer_load_dword v0, v0, s_restore_buf_rsrc0, s_restore_mem_offset_save slc:1 glc:1
buffer_load_dword v1, v0, s_restore_buf_rsrc0, s_restore_mem_offset_save slc:1 glc:1 offset:256
buffer_load_dword v2, v0, s_restore_buf_rsrc0, s_restore_mem_offset_save slc:1 glc:1 offset:256*2
buffer_load_dword v3, v0, s_restore_buf_rsrc0, s_restore_mem_offset_save slc:1 glc:1 offset:256*3
end
end
/* restore SGPRs */
//////////////////////////////
@ -1151,16 +812,8 @@ end
s_add_u32 s_restore_alloc_size, s_restore_alloc_size, 1
s_lshl_b32 s_restore_alloc_size, s_restore_alloc_size, 4 //Number of SGPRs = (sgpr_size + 1) * 16 (non-zero value)
if (SGPR_SAVE_USE_SQC)
s_lshl_b32 s_restore_buf_rsrc2, s_restore_alloc_size, 2 //NUM_RECORDS in bytes
else
s_lshl_b32 s_restore_buf_rsrc2, s_restore_alloc_size, 8 //NUM_RECORDS in bytes (64 threads)
end
if (SWIZZLE_EN)
s_add_u32 s_restore_buf_rsrc2, s_restore_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_restore_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
s_mov_b32 m0, s_restore_alloc_size
@ -1188,11 +841,6 @@ end
L_RESTORE_HWREG:
if G8SR_DEBUG_TIMESTAMP
s_mov_b32 s_g8sr_ts_restore_s[0], s_restore_pc_lo
s_mov_b32 s_g8sr_ts_restore_s[1], s_restore_pc_hi
end
// HWREG SR memory offset : size(VGPR)+size(SGPR)
get_vgpr_size_bytes(s_restore_mem_offset)
get_sgpr_size_bytes(s_restore_tmp)
@ -1200,11 +848,7 @@ end
s_mov_b32 s_restore_buf_rsrc2, 0x4 //NUM_RECORDS in bytes
if (SWIZZLE_EN)
s_add_u32 s_restore_buf_rsrc2, s_restore_buf_rsrc2, 0x0 //FIXME need to use swizzle to enable bounds checking?
else
s_mov_b32 s_restore_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
end
read_hwreg_from_mem(s_restore_m0, s_restore_buf_rsrc0, s_restore_mem_offset) //M0
read_hwreg_from_mem(s_restore_pc_lo, s_restore_buf_rsrc0, s_restore_mem_offset) //PC
@ -1219,16 +863,6 @@ end
s_waitcnt lgkmcnt(0) //from now on, it is safe to restore STATUS and IB_STS
//for normal save & restore, the saved PC points to the next inst to execute, no adjustment needs to be made, otherwise:
if ((EMU_RUN_HACK) && (!EMU_RUN_HACK_RESTORE_NORMAL))
s_add_u32 s_restore_pc_lo, s_restore_pc_lo, 8 //pc[31:0]+8 //two back-to-back s_trap are used (first for save and second for restore)
s_addc_u32 s_restore_pc_hi, s_restore_pc_hi, 0x0 //carry bit over
end
if ((EMU_RUN_HACK) && (EMU_RUN_HACK_RESTORE_NORMAL))
s_add_u32 s_restore_pc_lo, s_restore_pc_lo, 4 //pc[31:0]+4 // save is hack through s_trap but restore is normal
s_addc_u32 s_restore_pc_hi, s_restore_pc_hi, 0x0 //carry bit over
end
s_mov_b32 m0, s_restore_m0
s_mov_b32 exec_lo, s_restore_exec_lo
s_mov_b32 exec_hi, s_restore_exec_hi
@ -1275,11 +909,6 @@ end
s_barrier //barrier to ensure the readiness of LDS before access attempts from any other wave in the same TG //FIXME not performance-optimal at this time
if G8SR_DEBUG_TIMESTAMP
s_memrealtime s_g8sr_ts_restore_d
s_waitcnt lgkmcnt(0)
end
// s_rfe_b64 s_restore_pc_lo //Return to the main shader program and resume execution
s_rfe_restore_b64 s_restore_pc_lo, s_restore_m0 // s_restore_m0[0] is used to set STATUS.inst_atc