#!/usr/bin/env python3
"""Load/unload churn at scale: does the session slot table leak or issue out-of-range ids?

SYS_DRV indexes a 32-entry slot table and `sub_E0B148` bounds the index to < 0x20. Two things
worth knowing, neither testable before the ring ceiling was removed:

  * does repeated load/unload leak slots (loads eventually fail)?
  * is any session id >= 32 ever issued (which would index past the table)?

500 cycles, recording every session id and any failure.
"""
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)
blob=open(glob.glob('/root/psp/contall/ta_42-0-0-6_1c874c3c*')[0],'rb').read()
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()
def load():
    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=0x4000
    t0=time.time()
    try: r=submit(c); return r.resp.status&0xFFFFFFFF, r.resp.session_id, time.time()-t0
    except Exception as e:
        try: return int(str(e).strip().split()[-1])&0xFFFFFFFF, None, time.time()-t0
        except Exception: return -1, None, time.time()-t0
def unload(sid):
    c=am.struct_psp_gfx_cmd_resp(cmd_id=am.GFX_CMD_ID_UNLOAD_TA); c.cmd.cmd_unload_ta.session_id=sid
    try: return submit(c).resp.status&0xFFFFFFFF
    except Exception as e:
        try: return int(str(e).strip().split()[-1])&0xFFFFFFFF
        except Exception: return -1
ids=set(); fails=[]
for i in range(500):
    st,sid,dt = load()
    if dt>5: print('LOAD STALL at cycle %d'%i, flush=True); break
    if st!=0 or sid is None:
        fails.append((i,hex(st))); 
        if len(fails)>3: break
        continue
    ids.add(sid)
    u=unload(sid)
    if u!=0: fails.append((i,'unload %#x'%u)); break
    if i%100==0: print('  cycle %d ok (sid=%d)'%(i,sid), flush=True)
print('cycles completed, distinct session ids seen: %s'%sorted(ids), flush=True)
print('max sid: %s (table has 32 entries, accessor bounds to <0x20)'%(max(ids) if ids else None), flush=True)
print('failures: %s'%(fails[:5] or 'none'), flush=True)