#!/usr/bin/env python3
"""FP cmd 2: does the declared cmd_buf_len decide whether it hangs?

With cmd_buf_len = 0x4000 (pass 75 fuzz) FP cmd 2 is clean and only cmd 7 stalls.
With cmd_buf_len = 0x1000 FP cmd 2 stalls. So the host-declared window appears to decide
whether a command completes or hangs -- i.e. a command whose output does not fit produces a
hang instead of an error.

Sweep the declared length, largest first (a stall costs an ATX cycle).
"""
import glob, struct, sys, time
sys.path.insert(0,'/root/psp/hw')
from tinygrad import Device
import tinygrad.runtime.autogen.am.am as am
from ring_wrap import install
adev=Device["AMD"].iface.dev_impl; psp=adev.psp
submit=install(psp,adev)
def alloc(n):
    pa=adev.mm.palloc(n,align=0x1000,zero=True,boot=False); return pa,adev.paddr2mc(pa)
FP=glob.glob('/root/psp/contall/ta_19-0-0-8_7e8be282*')[0]
blob=open(FP,'rb').read()
def run(decl):
    ap_,amc=alloc(0x80000); cp,cmc=alloc(0x8000)
    n=(len(blob)+3)&~3
    adev.vram.view(ap_,n)[:]=blob+b'\x00'*(n-len(blob)); adev.gmc.flush_hdp()
    c=am.struct_psp_gfx_cmd_resp(cmd_id=am.GFX_CMD_ID_LOAD_TA); t=c.cmd.cmd_load_ta
    t.app_phy_addr_lo,t.app_phy_addr_hi=amc&0xFFFFFFFF,amc>>32; t.app_len=len(blob)
    t.cmd_buf_phy_addr_lo,t.cmd_buf_phy_addr_hi=cmc&0xFFFFFFFF,cmc>>32; t.cmd_buf_len=decl
    try: r=submit(c); st=r.resp.status&0xFFFFFFFF; sid=r.resp.session_id
    except Exception: return None
    buf=bytearray(0x8000); struct.pack_into('<I',buf,0,2)
    adev.vram.view(cp,0x8000)[:]=bytes(buf); adev.gmc.flush_hdp()
    c=am.struct_psp_gfx_cmd_resp(cmd_id=am.GFX_CMD_ID_INVOKE_CMD)
    iv=c.cmd.cmd_invoke_cmd; iv.session_id,iv.ta_cmd_id=sid,2
    t0=time.time()
    try: s=submit(c).resp.status&0xFFFFFFFF
    except Exception as e:
        try: s=int(str(e).strip().split()[-1])&0xFFFFFFFF
        except Exception: s=-1
    dt=time.time()-t0
    print('  decl=%#-8x load=%#-6x  cmd2 -> %#-12x %5.1fs%s'%(decl,st,s,dt,'  <<< STALL' if dt>5 else ''), flush=True)
    return dt>5
for d in (0x4000, 0x2000, 0x1800, 0x1000):
    if run(d): break