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# SPDX-License-Identifier: MIT
import struct
from ..common import *
from ...utils import *
from ..asc.base import *
class AFKEPMessage(Register64):
TYPE = 63, 48
class AFKEP_GetBuf(AFKEPMessage):
TYPE = 63, 48, Constant(0x89)
SIZE = 31, 16
TAG = 15, 0
class AFKEP_GetBuf_Ack(AFKEPMessage):
TYPE = 63, 48, Constant(0xa1)
DVA = 47, 0
class AFKEP_InitRB(AFKEPMessage):
OFFSET = 47, 32
SIZE = 31, 16
TAG = 15, 0
class AFKEP_Send(AFKEPMessage):
TYPE = 63, 48, Constant(0xa2)
WPTR = 31, 0
class AFKEP_Recv(AFKEPMessage):
TYPE = 63, 48, Constant(0x85)
WPTR = 31, 0
class AFKEP_Init(AFKEPMessage):
TYPE = 63, 48, Constant(0x80)
class AFKEP_Init_Ack(AFKEPMessage):
TYPE = 63, 48, Constant(0xa0)
class AFKEP_Start(AFKEPMessage):
TYPE = 63, 48, Constant(0xa3)
class AFKEP_Start_Ack(AFKEPMessage):
TYPE = 63, 48, Constant(0x86)
class AFKEP_Shutdown(AFKEPMessage):
TYPE = 63, 48, Constant(0xc0)
class AFKEP_Shutdown_Ack(AFKEPMessage):
TYPE = 63, 48, Constant(0xc1)
class AFKError(Exception):
pass
class AFKRingBuf(Reloadable):
BLOCK_SIZE = 0x40
def __init__(self, ep, base, size):
self.ep = ep
self.base = base
bs, unk = struct.unpack("<II", self.read_buf(0, 8))
assert (bs + 3 * self.BLOCK_SIZE) == size
self.bufsize = bs
self.rptr = 0
self.wptr = 0
def read_buf(self, off, size):
return self.ep.iface.readmem(self.base + off, size)
def write_buf(self, off, data):
return self.ep.iface.writemem(self.base + off, data)
def get_rptr(self):
return self.ep.asc.p.read32(self.base + self.BLOCK_SIZE)
def get_wptr(self):
return self.ep.asc.p.read32(self.base + 2 * self.BLOCK_SIZE)
def update_rptr(self, rptr):
self.ep.asc.p.write32(self.base + self.BLOCK_SIZE, self.rptr)
def update_wptr(self, rptr):
self.ep.asc.p.write32(self.base + 2 * self.BLOCK_SIZE, self.wptr)
def read(self):
self.wptr = self.get_wptr()
while self.wptr != self.rptr:
hdr = self.read_buf(3 * self.BLOCK_SIZE + self.rptr, 16)
self.rptr += 16
magic, size = struct.unpack("<4sI", hdr[:8])
assert magic in [b"IOP ", b"AOP "]
if size > (self.bufsize - self.rptr):
hdr = self.read_buf(3 * self.BLOCK_SIZE, 16)
self.rptr = 16
magic, size = struct.unpack("<4sI", hdr[:8])
assert magic in [b"IOP ", b"AOP "]
payload = self.read_buf(3 * self.BLOCK_SIZE + self.rptr, size)
self.rptr = (align_up(self.rptr + size, self.BLOCK_SIZE)) % self.bufsize
self.update_rptr(self.rptr)
yield hdr[8:] + payload
self.wptr = self.get_wptr()
self.update_rptr(self.rptr)
def write(self, data):
hdr2, data = data[:8], data[8:]
self.rptr = self.get_rptr()
if self.wptr < self.rptr and self.wptr + 0x10 >= self.rptr:
raise AFKError("Ring buffer is full")
hdr = struct.pack("<4sI", b"IOP ", len(data)) + hdr2
self.write_buf(3 * self.BLOCK_SIZE + self.wptr, hdr)
if len(data) > (self.bufsize - self.wptr - 16):
if self.rptr < 0x10:
raise AFKError("Ring buffer is full")
self.write_buf(3 * self.BLOCK_SIZE, hdr)
self.wptr = 0
if self.wptr < self.rptr and self.wptr + 0x10 + len(data) >= self.rptr:
raise AFKError("Ring buffer is full")
self.write_buf(3 * self.BLOCK_SIZE + self.wptr + 0x10, data)
self.wptr = align_up(self.wptr + 0x10 + len(data), self.BLOCK_SIZE) % self.bufsize
self.update_wptr(self.wptr)
return self.wptr
class AFKRingBufEndpoint(ASCBaseEndpoint):
BASE_MESSAGE = AFKEPMessage
SHORT = "afkep"
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.txq = None
self.rxq = None
self.iface = self.asc.iface
self.alive = False
self.started = False
self.iobuffer = None
self.verbose = 2
self.msgid = 0
def start(self):
self.send(AFKEP_Init())
@msg_handler(0xa0, AFKEP_Init_Ack)
def Init_Ack(self, msg):
self.alive = True
return True
@msg_handler(0x89, AFKEP_GetBuf)
def GetBuf(self, msg):
size = msg.SIZE * AFKRingBuf.BLOCK_SIZE
if self.iobuffer:
print("WARNING: trying to reset iobuffer!")
self.iobuffer, self.iobuffer_dva = self.asc.ioalloc(size)
self.asc.p.write32(self.iobuffer, 0xdeadbeef)
self.send(AFKEP_GetBuf_Ack(DVA=self.iobuffer_dva))
self.log(f"Buffer: phys={self.iobuffer:#x} dva={self.iobuffer_dva:#x} size={size:#x}")
return True
def stop(self):
self.log("Shutting down")
self.send(AFKEP_Shutdown())
while self.alive:
self.asc.work()
@msg_handler(0xc1, AFKEP_Shutdown_Ack)
def Shutdown_Ack(self, msg):
self.alive = False
self.log("Shutdown ACKed")
return True
@msg_handler(0x8a, AFKEP_InitRB)
def InitTX(self, msg):
self.txq = self.init_rb(msg)
if self.rxq and self.txq:
self.start_queues()
return True
@msg_handler(0x8b, AFKEP_InitRB)
def InitRX(self, msg):
self.rxq = self.init_rb(msg)
if self.rxq and self.txq:
self.start_queues()
return True
def init_rb(self, msg):
off = msg.OFFSET * AFKRingBuf.BLOCK_SIZE
size = msg.SIZE * AFKRingBuf.BLOCK_SIZE
return AFKRingBuf(self, self.iobuffer + off, size)
def start_queues(self):
self.send(AFKEP_Start())
@msg_handler(0x86, AFKEP_Start_Ack)
def Start_Ack(self, msg):
self.started = True
return True
@msg_handler(0x85, AFKEP_Recv)
def Recv(self, msg):
for data in self.rxq.read():
if self.verbose >= 3:
self.log(f"<RX rptr={self.rxq.rptr:#x}")
chexdump(data)
self.handle_ipc(data)
return True
def handle_ipc(self, data):
pass
def send_ipc(self, data):
wptr = self.txq.write(data)
self.send(AFKEP_Send(WPTR = wptr))
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