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session.c: refactor.

This commit is contained in:
whitequark 2015-08-08 13:21:43 +03:00
parent d6ab567242
commit ecdebc0b8a
10 changed files with 437 additions and 354 deletions
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25
artiq/coredevice/comm_generic.py
View File

@ -122,8 +122,9 @@ class CommGeneric:
def _read_chunk(self, length):
if self._read_length < length:
raise IOError("Read overrun while trying to read {} bytes ({} remaining)".
format(length, self._read_length))
raise IOError("Read overrun while trying to read {} bytes ({} remaining)"
" in packet {}".
format(length, self._read_length, self._read_type))
self._read_length -= length
return self.read(length)
@ -144,6 +145,12 @@ class CommGeneric:
(value, ) = struct.unpack(">d", self._read_chunk(8))
return value
def _read_bytes(self):
return self._read_chunk(self._read_int32())
def _read_string(self):
return self._read_bytes()[:-1].decode('utf-8')
#
# Writer interface
#
@ -170,6 +177,9 @@ class CommGeneric:
self._write_header(ty)
self._write_flush()
def _write_chunk(self, chunk):
self._write_buffer.append(chunk)
def _write_int8(self, value):
self._write_buffer.append(struct.pack("B", value))
@ -182,9 +192,13 @@ class CommGeneric:
def _write_float64(self, value):
self._write_buffer.append(struct.pack(">d", value))
def _write_string(self, value):
def _write_bytes(self, value):
self._write_int32(len(value))
self._write_buffer.append(value)
def _write_string(self, value):
self._write_bytes(value.encode("utf-8") + b"\0")
#
# Exported APIs
#
@ -211,7 +225,7 @@ class CommGeneric:
def load(self, kernel_library):
self._write_header(_H2DMsgType.LOAD_LIBRARY)
self._write_string(kernel_library)
self._write_chunk(kernel_library)
self._write_flush()
self._read_empty(_D2HMsgType.LOAD_COMPLETED)
@ -232,8 +246,7 @@ class CommGeneric:
def flash_storage_write(self, key, value):
self._write_header(_H2DMsgType.FLASH_WRITE_REQUEST)
self._write_string(key)
self._write_string(b"\x00")
self._write_string(value)
self._write_bytes(value)
self._write_flush()
self._read_header()

8
artiq/coredevice/comm_serial.py
View File

@ -28,10 +28,10 @@ class Comm(CommGeneric):
del self.port
def read(self, length):
r = bytes()
while len(r) < length:
r += self.port.read(length - len(r))
return r
result = bytes()
while len(result) < length:
result += self.port.read(length - len(result))
return result
def write(self, data):
remaining = len(data)

11
artiq/frontend/artiq_coretool.py
View File

@ -26,7 +26,7 @@ def get_argparser():
# Configuration Read command
p_read = subparsers.add_parser("cfg-read",
help="read key from core device config")
p_read.add_argument("key", type=to_bytes,
p_read.add_argument("key", type=str,
help="key to be read from core device config")
# Configuration Write command
@ -34,11 +34,11 @@ def get_argparser():
help="write key-value records to core "
"device config")
p_write.add_argument("-s", "--string", nargs=2, action="append",
default=[], metavar=("KEY", "STRING"), type=to_bytes,
default=[], metavar=("KEY", "STRING"), type=str,
help="key-value records to be written to core device "
"config")
p_write.add_argument("-f", "--file", nargs=2, action="append",
type=to_bytes, default=[],
type=str, default=[],
metavar=("KEY", "FILENAME"),
help="key and file whose content to be written to "
"core device config")
@ -47,7 +47,7 @@ def get_argparser():
p_delete = subparsers.add_parser("cfg-delete",
help="delete key from core device config")
p_delete.add_argument("key", nargs=argparse.REMAINDER,
default=[], type=to_bytes,
default=[], type=str,
help="key to be deleted from core device config")
# Configuration Erase command
@ -61,6 +61,7 @@ def main():
dmgr = DeviceManager(FlatFileDB(args.ddb))
try:
comm = dmgr.get("comm")
comm.check_ident()
if args.action == "log":
print(comm.get_log())
@ -72,7 +73,7 @@ def main():
print(value)
elif args.action == "cfg-write":
for key, value in args.string:
comm.flash_storage_write(key, value)
comm.flash_storage_write(key, value.encode('utf-8'))
for key, filename in args.file:
with open(filename, "rb") as fi:
comm.flash_storage_write(key, fi.read())

14
soc/runtime/flash_storage.c
View File

@ -115,7 +115,8 @@ static int is_empty(struct record *record)
return record->value_len == 0;
}
static int key_exists(char *buff, char *key, char *end, char accept_empty, struct record *found_record)
static int key_exists(char *buff, const char *key, char *end, char accept_empty,
struct record *found_record)
{
struct iter_state is;
struct record iter_record;
@ -170,7 +171,7 @@ static char check_for_empty_records(char *buff)
return 0;
}
static unsigned int try_to_flush_duplicates(char *new_key, unsigned int buf_len)
static unsigned int try_to_flush_duplicates(const char *new_key, unsigned int buf_len)
{
unsigned int key_size, new_record_size, ret = 0, can_rollback = 0;
struct record record, previous_record;
@ -210,7 +211,8 @@ static unsigned int try_to_flush_duplicates(char *new_key, unsigned int buf_len)
return ret;
}
static void write_at_offset(char *key, void *buffer, int buf_len, unsigned int sector_offset)
static void write_at_offset(const char *key, const void *buffer,
int buf_len, unsigned int sector_offset)
{
int key_len = strlen(key) + 1;
unsigned int record_size = key_len + buf_len + sizeof(record_size);
@ -223,7 +225,7 @@ static void write_at_offset(char *key, void *buffer, int buf_len, unsigned int s
}
int fs_write(char *key, void *buffer, unsigned int buf_len)
int fs_write(const char *key, const void *buffer, unsigned int buf_len)
{
struct record record;
unsigned int key_size = strlen(key) + 1;
@ -269,7 +271,7 @@ void fs_erase(void)
flush_cpu_dcache();
}
unsigned int fs_read(char *key, void *buffer, unsigned int buf_len, unsigned int *remain)
unsigned int fs_read(const char *key, void *buffer, unsigned int buf_len, unsigned int *remain)
{
unsigned int read_length = 0;
struct iter_state is;
@ -295,7 +297,7 @@ unsigned int fs_read(char *key, void *buffer, unsigned int buf_len, unsigned int
return read_length;
}
void fs_remove(char *key)
void fs_remove(const char *key)
{
fs_write(key, NULL, 0);
}

6
soc/runtime/flash_storage.h
View File

@ -5,9 +5,9 @@
#ifndef __FLASH_STORAGE_H
#define __FLASH_STORAGE_H
void fs_remove(char *key);
void fs_remove(const char *key);
void fs_erase(void);
int fs_write(char *key, void *buffer, unsigned int buflen);
unsigned int fs_read(char *key, void *buffer, unsigned int buflen, unsigned int *remain);
int fs_write(const char *key, const void *buffer, unsigned int buflen);
unsigned int fs_read(const char *key, void *buffer, unsigned int buflen, unsigned int *remain);
#endif /* __FLASH_STORAGE_H */

2
soc/runtime/ksupport.h
View File

@ -5,7 +5,7 @@ long long int now_init(void);
void now_save(long long int now);
int watchdog_set(int ms);
void watchdog_clear(int id);
int rpc(int rpc_num, ...);
int rpc(int service, ...);
void lognonl(const char *fmt, ...);
void log(const char *fmt, ...);

8
soc/runtime/main.c
View File

@ -189,12 +189,12 @@ static void serial_service(void)
session_poll((void **)&txdata, &txlen);
if(txlen > 0) {
for(i=0;i<txlen;i++)
for(i = 0; i < txlen; i++)
uart_write(txdata[i]);
session_ack_data(txlen);
session_ack_mem(txlen);
} else if(txlen < 0)
session_ack(txlen);
} else if(txlen < 0) {
reset_serial_session(1);
}
}
static void regular_main(void)

3
soc/runtime/net_server.c
View File

@ -89,7 +89,7 @@ static err_t net_server_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err
static err_t net_server_sent(void *arg, struct tcp_pcb *pcb, u16_t len)
{
session_ack_mem(len);
session_ack(len);
return ERR_OK;
}
@ -205,7 +205,6 @@ void net_server_service(void)
if(len > sndbuf)
len = sndbuf;
tcp_write(active_pcb, data, len, 0);
session_ack_data(len);
}
if(len < 0)
net_server_close(active_cs, active_pcb);

705
soc/runtime/session.c
View File

@ -18,43 +18,230 @@
#define BUFFER_IN_SIZE (1024*1024)
#define BUFFER_OUT_SIZE (1024*1024)
static int buffer_in_index;
/* The 9th byte (right after the header) of buffer_in must be aligned
* to a 32-bit boundary for elf_loader to work.
*/
static int process_input();
static int out_packet_available();
// ============================= Reader interface =============================
// Align the 9th byte (right after the header) of buffer_in so that
// the payload can be deserialized directly from the buffer using word reads.
static struct {
char padding[3];
union {
char data[BUFFER_IN_SIZE];
} __attribute__((packed)) _buffer_in __attribute__((aligned(4)));
#define buffer_in _buffer_in.data
static int buffer_out_index_data;
static int buffer_out_index_mem;
static char buffer_out[BUFFER_OUT_SIZE];
struct {
int32_t sync;
int32_t length;
int8_t type;
} __attribute__((packed)) header;
};
} __attribute__((packed, aligned(4))) buffer_in;
static int get_in_packet_len(void)
{
int r;
static int buffer_in_write_cursor, buffer_in_read_cursor;
memcpy(&r, &buffer_in[4], 4);
return r;
static void in_packet_reset() {
buffer_in_write_cursor = 0;
buffer_in_read_cursor = 0;
}
static int get_out_packet_len(void)
static int in_packet_fill(uint8_t *data, int length)
{
int r;
int consumed = 0;
while(consumed < length) {
/* Make sure the output buffer is available for any reply
* we might need to send. */
if(!out_packet_available())
break;
memcpy(&r, &buffer_out[4], 4);
return r;
if(buffer_in_write_cursor < 4) {
/* Haven't received the synchronization sequence yet. */
buffer_in.data[buffer_in_write_cursor++] = data[consumed];
/* Framing error? */
if(data[consumed++] != 0x5a) {
buffer_in_write_cursor = 0;
continue;
}
} else if(buffer_in_write_cursor < 8) {
/* Haven't received the packet length yet. */
buffer_in.data[buffer_in_write_cursor++] = data[consumed++];
} else if(buffer_in.header.length == 0) {
/* Zero-length packet means session reset. */
return -2;
} else if(buffer_in.header.length > BUFFER_IN_SIZE) {
/* Packet wouldn't fit in the buffer. */
return -1;
} else if(buffer_in.header.length > buffer_in_write_cursor) {
/* Receiving payload. */
int remaining = buffer_in.header.length - buffer_in_write_cursor;
int amount = length - consumed > remaining ? remaining : length - consumed;
memcpy(&buffer_in.data[buffer_in_write_cursor], &data[consumed],
amount);
buffer_in_write_cursor += amount;
consumed += amount;
}
if(buffer_in.header.length == buffer_in_write_cursor) {
/* We have a complete packet. */
buffer_in_read_cursor = sizeof(buffer_in.header);
if(!process_input())
return -1;
if(buffer_in_read_cursor < buffer_in_write_cursor) {
log("session.c: read underrun (%d bytes remaining)",
buffer_in_write_cursor - buffer_in_read_cursor);
}
in_packet_reset();
}
}
return consumed;
}
static void submit_output(int len)
{
memset(&buffer_out[0], 0x5a, 4);
memcpy(&buffer_out[4], &len, 4);
buffer_out_index_data = 0;
buffer_out_index_mem = 0;
static void in_packet_chunk(void *ptr, int length) {
if(buffer_in_read_cursor + length > buffer_in_write_cursor) {
log("session.c: read overrun while trying to read %d bytes"
" (%d remaining)",
length, buffer_in_write_cursor - buffer_in_read_cursor);
}
if(ptr != NULL)
memcpy(ptr, &buffer_in.data[buffer_in_read_cursor], length);
buffer_in_read_cursor += length;
}
static int8_t in_packet_int8() {
int8_t result;
in_packet_chunk(&result, sizeof(result));
return result;
}
static int32_t in_packet_int32() {
int32_t result;
in_packet_chunk(&result, sizeof(result));
return result;
}
static const void *in_packet_bytes(int *length) {
*length = in_packet_int32();
const void *ptr = &buffer_in.data[buffer_in_read_cursor];
in_packet_chunk(NULL, *length);
return ptr;
}
static const char *in_packet_string() {
int length;
const char *string = in_packet_bytes(&length);
if(string[length] != 0) {
log("session.c: string is not zero-terminated");
return "";
}
return string;
}
// ============================= Writer interface =============================
static union {
char data[BUFFER_OUT_SIZE];
struct {
int32_t sync;
int32_t length;
int8_t type;
} __attribute__((packed)) header;
} buffer_out;
static int buffer_out_read_cursor, buffer_out_write_cursor;
static void out_packet_reset() {
buffer_out_read_cursor = 0;
buffer_out_write_cursor = 0;
}
static int out_packet_available() {
return buffer_out_write_cursor == 0;
}
static void out_packet_extract(void **data, int *length) {
if(buffer_out_write_cursor > 0 &&
buffer_out.header.length > 0) {
*data = &buffer_out.data[buffer_out_read_cursor];
*length = buffer_out_write_cursor - buffer_out_read_cursor;
} else {
*length = 0;
}
}
static void out_packet_advance(int length) {
if(buffer_out_read_cursor + length > buffer_out_write_cursor) {
log("session.c: write underrun while trying to acknowledge %d bytes"
" (%d remaining)",
length, buffer_out_write_cursor - buffer_out_read_cursor);
return;
}
buffer_out_read_cursor += length;
if(buffer_out_read_cursor == buffer_out_write_cursor)
out_packet_reset();
}
static int out_packet_chunk(const void *ptr, int length) {
if(buffer_out_write_cursor + length > BUFFER_OUT_SIZE) {
log("session.c: write overrun while trying to write %d bytes"
" (%d remaining)",
length, BUFFER_OUT_SIZE - buffer_out_write_cursor);
return 0;
}
memcpy(&buffer_out.data[buffer_out_write_cursor], ptr, length);
buffer_out_write_cursor += length;
return 1;
}
static void out_packet_start(int type) {
buffer_out.header.sync = 0x5a5a5a5a;
buffer_out.header.type = type;
buffer_out.header.length = 0;
buffer_out_write_cursor = sizeof(buffer_out.header);
}
static void out_packet_finish() {
buffer_out.header.length = buffer_out_write_cursor;
}
static void out_packet_empty(int type) {
out_packet_start(type);
out_packet_finish();
}
static int out_packet_int8(int8_t value) {
return out_packet_chunk(&value, sizeof(value));
}
static int out_packet_int32(int32_t value) {
return out_packet_chunk(&value, sizeof(value));
}
static int out_packet_int64(int64_t value) {
return out_packet_chunk(&value, sizeof(value));
}
static int out_packet_float64(double value) {
return out_packet_chunk(&value, sizeof(value));
}
static int out_packet_bytes(const void *ptr, int length) {
return out_packet_int32(length) &&
out_packet_chunk(ptr, length);
}
static int out_packet_string(const char *string) {
return out_packet_bytes(string, strlen(string) + 1);
}
// =============================== API handling ===============================
static int user_kernel_state;
enum {
@ -66,11 +253,12 @@ enum {
void session_start(void)
{
buffer_in_index = 0;
memset(&buffer_out[4], 0, 4);
in_packet_reset();
out_packet_reset();
kloader_stop();
user_kernel_state = USER_KERNEL_NONE;
now = -1;
user_kernel_state = USER_KERNEL_NONE;
}
void session_end(void)
@ -118,69 +306,108 @@ enum {
REMOTEMSG_TYPE_FLASH_ERROR_REPLY
};
static int check_flash_storage_key_len(char *key, unsigned int key_len)
{
if(key_len == get_in_packet_len() - 8) {
log("Invalid key: not a null-terminated string");
buffer_out[8] = REMOTEMSG_TYPE_FLASH_ERROR_REPLY;
submit_output(9);
return 0;
}
return 1;
}
static int process_input(void)
{
switch(buffer_in[8]) {
switch(buffer_in.header.type) {
case REMOTEMSG_TYPE_IDENT_REQUEST:
out_packet_start(REMOTEMSG_TYPE_IDENT_REPLY);
out_packet_chunk("AROR", 4);
out_packet_finish();
break;
case REMOTEMSG_TYPE_SWITCH_CLOCK: {
int clk = in_packet_int8();
if(user_kernel_state >= USER_KERNEL_RUNNING) {
log("Attempted to switch RTIO clock while kernel running");
out_packet_empty(REMOTEMSG_TYPE_CLOCK_SWITCH_FAILED);
break;
}
if(rtiocrg_switch_clock(clk))
out_packet_empty(REMOTEMSG_TYPE_CLOCK_SWITCH_COMPLETED);
else
out_packet_empty(REMOTEMSG_TYPE_CLOCK_SWITCH_FAILED);
break;
}
case REMOTEMSG_TYPE_LOG_REQUEST:
#if (LOG_BUFFER_SIZE + 9) > BUFFER_OUT_SIZE
#error Output buffer cannot hold the log buffer
#endif
buffer_out[8] = REMOTEMSG_TYPE_LOG_REPLY;
log_get(&buffer_out[9]);
submit_output(9 + LOG_BUFFER_SIZE);
out_packet_start(REMOTEMSG_TYPE_LOG_REPLY);
log_get(&buffer_out.data[buffer_out_write_cursor]);
buffer_out_write_cursor += LOG_BUFFER_SIZE;
out_packet_finish();
break;
case REMOTEMSG_TYPE_IDENT_REQUEST:
buffer_out[8] = REMOTEMSG_TYPE_IDENT_REPLY;
buffer_out[9] = 'A';
buffer_out[10] = 'R';
buffer_out[11] = 'O';
buffer_out[12] = 'R';
submit_output(13);
break;
case REMOTEMSG_TYPE_SWITCH_CLOCK:
if(user_kernel_state >= USER_KERNEL_RUNNING) {
log("Attempted to switch RTIO clock while kernel running");
buffer_out[8] = REMOTEMSG_TYPE_CLOCK_SWITCH_FAILED;
submit_output(9);
case REMOTEMSG_TYPE_FLASH_READ_REQUEST: {
#if SPIFLASH_SECTOR_SIZE - 4 > BUFFER_OUT_SIZE - 9
#error Output buffer cannot hold the flash storage data
#endif
const char *key = in_packet_string();
int value_length;
out_packet_start(REMOTEMSG_TYPE_FLASH_READ_REPLY);
value_length = fs_read(key, &buffer_out.data[buffer_out_write_cursor],
sizeof(buffer_out.data) - buffer_out_write_cursor, NULL);
buffer_out_write_cursor += value_length;
out_packet_finish();
break;
}
if(rtiocrg_switch_clock(buffer_in[9]))
buffer_out[8] = REMOTEMSG_TYPE_CLOCK_SWITCH_COMPLETED;
case REMOTEMSG_TYPE_FLASH_WRITE_REQUEST: {
#if SPIFLASH_SECTOR_SIZE - 4 > BUFFER_IN_SIZE - 9
#error Input buffer cannot hold the flash storage data
#endif
const char *key, *value;
int value_length;
key = in_packet_string();
value = in_packet_bytes(&value_length);
if(fs_write(key, value, value_length))
out_packet_empty(REMOTEMSG_TYPE_FLASH_OK_REPLY);
else
buffer_out[8] = REMOTEMSG_TYPE_CLOCK_SWITCH_FAILED;
submit_output(9);
out_packet_empty(REMOTEMSG_TYPE_FLASH_ERROR_REPLY);
break;
case REMOTEMSG_TYPE_LOAD_LIBRARY:
}
case REMOTEMSG_TYPE_FLASH_ERASE_REQUEST:
fs_erase();
out_packet_empty(REMOTEMSG_TYPE_FLASH_OK_REPLY);
break;
case REMOTEMSG_TYPE_FLASH_REMOVE_REQUEST: {
const char *key = in_packet_string();
fs_remove(key);
out_packet_empty(REMOTEMSG_TYPE_FLASH_OK_REPLY);
break;
}
case REMOTEMSG_TYPE_LOAD_LIBRARY: {
const void *kernel = &buffer_in.data[buffer_in_read_cursor];
buffer_in_read_cursor = buffer_in_write_cursor;
if(user_kernel_state >= USER_KERNEL_RUNNING) {
log("Attempted to load new kernel library while already running");
buffer_out[8] = REMOTEMSG_TYPE_LOAD_FAILED;
submit_output(9);
out_packet_empty(REMOTEMSG_TYPE_LOAD_FAILED);
break;
}
if(kloader_load_library(&buffer_in[9])) {
buffer_out[8] = REMOTEMSG_TYPE_LOAD_COMPLETED;
if(kloader_load_library(kernel)) {
out_packet_empty(REMOTEMSG_TYPE_LOAD_COMPLETED);
user_kernel_state = USER_KERNEL_LOADED;
} else {
buffer_out[8] = REMOTEMSG_TYPE_LOAD_FAILED;
out_packet_empty(REMOTEMSG_TYPE_LOAD_FAILED);
}
submit_output(9);
break;
case REMOTEMSG_TYPE_RUN_KERNEL: {
}
case REMOTEMSG_TYPE_RUN_KERNEL:
if(user_kernel_state != USER_KERNEL_LOADED) {
log("Attempted to run kernel while not in the LOADED state");
buffer_out[8] = REMOTEMSG_TYPE_KERNEL_STARTUP_FAILED;
submit_output(9);
out_packet_empty(REMOTEMSG_TYPE_KERNEL_STARTUP_FAILED);
break;
}
@ -189,254 +416,100 @@ static int process_input(void)
user_kernel_state = USER_KERNEL_RUNNING;
break;
}
case REMOTEMSG_TYPE_RPC_REPLY: {
struct msg_rpc_reply reply;
if(user_kernel_state != USER_KERNEL_WAIT_RPC) {
log("Unsolicited RPC reply");
return 0;
return 0; // restart session
}
reply.type = MESSAGE_TYPE_RPC_REPLY;
// FIXME memcpy(&reply.eid, &buffer_in[9], 4);
memcpy(&reply.retval, &buffer_in[13], 4);
// memcpy(&reply.retval, &buffer_in[13], 4);
mailbox_send_and_wait(&reply);
user_kernel_state = USER_KERNEL_RUNNING;
break;
}
case REMOTEMSG_TYPE_FLASH_READ_REQUEST: {
#if SPIFLASH_SECTOR_SIZE - 4 > BUFFER_OUT_SIZE - 9
#error Output buffer cannot hold the flash storage data
#elif SPIFLASH_SECTOR_SIZE - 4 > BUFFER_IN_SIZE - 9
#error Input buffer cannot hold the flash storage data
#endif
unsigned int ret, in_packet_len;
char *key;
in_packet_len = get_in_packet_len();
key = &buffer_in[9];
buffer_in[in_packet_len] = '\0';
buffer_out[8] = REMOTEMSG_TYPE_FLASH_READ_REPLY;
ret = fs_read(key, &buffer_out[9], sizeof(buffer_out) - 9, NULL);
submit_output(9 + ret);
break;
}
case REMOTEMSG_TYPE_FLASH_WRITE_REQUEST: {
char *key, *value;
unsigned int key_len, value_len, in_packet_len;
int ret;
in_packet_len = get_in_packet_len();
key = &buffer_in[9];
key_len = strnlen(key, in_packet_len - 9) + 1;
if(!check_flash_storage_key_len(key, key_len))
break;
value_len = in_packet_len - key_len - 9;
value = key + key_len;
ret = fs_write(key, value, value_len);
if(ret)
buffer_out[8] = REMOTEMSG_TYPE_FLASH_OK_REPLY;
else
buffer_out[8] = REMOTEMSG_TYPE_FLASH_ERROR_REPLY;
submit_output(9);
break;
}
case REMOTEMSG_TYPE_FLASH_ERASE_REQUEST: {
fs_erase();
buffer_out[8] = REMOTEMSG_TYPE_FLASH_OK_REPLY;
submit_output(9);
break;
}
case REMOTEMSG_TYPE_FLASH_REMOVE_REQUEST: {
char *key;
unsigned int in_packet_len;
in_packet_len = get_in_packet_len();
key = &buffer_in[9];
buffer_in[in_packet_len] = '\0';
fs_remove(key);
buffer_out[8] = REMOTEMSG_TYPE_FLASH_OK_REPLY;
submit_output(9);
break;
}
default:
return 0;
}
return 1;
}
/* Returns -1 in case of irrecoverable error
* (the session must be dropped and session_end called)
*/
int session_input(void *data, int len)
{
unsigned char *_data = data;
int consumed;
static int send_rpc_value(const char **tag, void *value) {
out_packet_int8(**tag);
consumed = 0;
while(len > 0) {
/* Make sure the output buffer is available for any reply
* we might need to send. */
if(get_out_packet_len() != 0)
return consumed;
int size = 0;
switch(**tag) {
case 0: // last tag
case 'n': // None
break;
if(buffer_in_index < 4) {
/* synchronizing */
if(_data[consumed] == 0x5a)
buffer_in[buffer_in_index++] = 0x5a;
else
buffer_in_index = 0;
consumed++; len--;
} else if(buffer_in_index < 8) {
/* receiving length */
buffer_in[buffer_in_index++] = _data[consumed];
consumed++; len--;
if((buffer_in_index == 8) && (get_in_packet_len() == 0))
/* zero-length packet = session reset */
return -2;
} else {
/* receiving payload */
int packet_len;
int count;
case 'b': // bool
size = 1;
out_packet_chunk(value, size);
break;
packet_len = get_in_packet_len();
if(packet_len > BUFFER_IN_SIZE)
case 'i': // int(width=32)
size = 4;
out_packet_chunk(value, size);
break;
case 'I': // int(width=64)
case 'f': // float
size = 8;
out_packet_chunk(value, size);
break;
case 'F': // Fraction
size = 16;
out_packet_chunk(value, size);
break;
case 'l': { // list(elt='a)
size = sizeof(void*);
struct { uint32_t length; void *elements; } *list = value;
void *element = list->elements;
const char *tag_copy = *tag + 1;
for(int i = 0; i < list->length; i++) {
int element_size = send_rpc_value(&tag_copy, element);
if(element_size < 0)
return -1;
count = packet_len - buffer_in_index;
if(count > len)
count = len;
memcpy(&buffer_in[buffer_in_index], &_data[consumed], count);
buffer_in_index += count;
if(buffer_in_index == packet_len) {
if(!process_input())
return -1;
buffer_in_index = 0;
element = (void*)((intptr_t)element + element_size);
}
*tag = tag_copy;
break;
}
consumed += count; len -= count;
}
}
return consumed;
}
static int add_base_rpc_value(char base_type, void *value, char *buffer_out, int available_space)
{
switch(base_type) {
case 'n':
return 0;
case 'b':
if(available_space < 1)
return -1;
if(*(char *)value)
buffer_out[0] = 1;
else
buffer_out[0] = 0;
return 1;
case 'i':
if(available_space < 4)
return -1;
memcpy(buffer_out, value, 4);
return 4;
case 'I':
case 'f':
if(available_space < 8)
return -1;
memcpy(buffer_out, value, 8);
return 8;
case 'F':
if(available_space < 16)
return -1;
memcpy(buffer_out, value, 16);
return 16;
default:
return -1;
}
(*tag)++;
return size;
}
static int add_rpc_value(int bi, int type_tag, void *value)
static int send_rpc_request(int service, va_list args)
{
char base_type;
int obi, r;
out_packet_start(REMOTEMSG_TYPE_RPC_REQUEST);
out_packet_int32(service);
obi = bi;
base_type = type_tag;
if((bi + 1) > BUFFER_OUT_SIZE)
return -1;
buffer_out[bi++] = base_type;
if(base_type == 'l') {
char elt_type;
int len;
int i, p;
elt_type = type_tag >> 8;
if((bi + 1) > BUFFER_OUT_SIZE)
return -1;
buffer_out[bi++] = elt_type;
len = *(int *)value;
if((bi + 4) > BUFFER_OUT_SIZE)
return -1;
memcpy(&buffer_out[bi], &len, 4);
bi += 4;
p = 4;
for(i=0;i<len;i++) {
r = add_base_rpc_value(elt_type, (char *)value + p,
&buffer_out[bi], BUFFER_OUT_SIZE - bi);
if(r < 0)
return r;
bi += r;
p += r;
}
} else {
r = add_base_rpc_value(base_type, value,
&buffer_out[bi], BUFFER_OUT_SIZE - bi);
if(r < 0)
return r;
bi += r;
}
return bi - obi;
}
static int send_rpc_request(int rpc_num, va_list args)
{
int r;
int bi = 8;
int type_tag;
void *v;
buffer_out[bi++] = REMOTEMSG_TYPE_RPC_REQUEST;
memcpy(&buffer_out[bi], &rpc_num, 4);
bi += 4;
while((type_tag = va_arg(args, int))) {
if(type_tag == 'n')
v = NULL;
else {
v = va_arg(args, void *);
if(!kloader_validate_kpointer(v))
const char *tag = va_arg(args, const char*);
while(*tag) {
void *value = va_arg(args, void*);
if(!kloader_validate_kpointer(value))
return 0;
if(send_rpc_value(&tag, &value) < 0)
return 0;
}
r = add_rpc_value(bi, type_tag, v);
if(r < 0)
return 0;
bi += r;
}
if((bi + 1) > BUFFER_OUT_SIZE)
return 0;
buffer_out[bi++] = 0;
submit_output(bi);
out_packet_finish();
return 1;
}
@ -454,26 +527,27 @@ static int process_kmsg(struct msg_base *umsg)
switch(umsg->type) {
case MESSAGE_TYPE_FINISHED:
buffer_out[8] = REMOTEMSG_TYPE_KERNEL_FINISHED;
submit_output(9);
out_packet_empty(REMOTEMSG_TYPE_KERNEL_FINISHED);
kloader_stop();
user_kernel_state = USER_KERNEL_LOADED;
mailbox_acknowledge();
break;
case MESSAGE_TYPE_EXCEPTION: {
struct msg_exception *msg = (struct msg_exception *)umsg;
buffer_out[8] = REMOTEMSG_TYPE_KERNEL_EXCEPTION;
out_packet_empty(REMOTEMSG_TYPE_KERNEL_EXCEPTION);
// memcpy(&buffer_out[9], &msg->eid, 4);
// memcpy(&buffer_out[13], msg->eparams, 3*8);
submit_output(9+4+3*8);
// submit_output(9+4+3*8);
kloader_stop();
user_kernel_state = USER_KERNEL_LOADED;
mailbox_acknowledge();
break;
}
case MESSAGE_TYPE_WATCHDOG_SET_REQUEST: {
struct msg_watchdog_set_request *msg = (struct msg_watchdog_set_request *)umsg;
struct msg_watchdog_set_reply reply;
@ -483,6 +557,7 @@ static int process_kmsg(struct msg_base *umsg)
mailbox_send_and_wait(&reply);
break;
}
case MESSAGE_TYPE_WATCHDOG_CLEAR: {
struct msg_watchdog_clear *msg = (struct msg_watchdog_clear *)umsg;
@ -490,76 +565,72 @@ static int process_kmsg(struct msg_base *umsg)
mailbox_acknowledge();
break;
}
case MESSAGE_TYPE_RPC_REQUEST: {
struct msg_rpc_request *msg = (struct msg_rpc_request *)umsg;
if(!send_rpc_request(msg->rpc_num, msg->args))
if(!send_rpc_request(msg->rpc_num, msg->args)) {
log("Failed to send RPC request");
return 0;
}
user_kernel_state = USER_KERNEL_WAIT_RPC;
mailbox_acknowledge();
break;
}
default: {
log("Received invalid message type from kernel CPU");
default:
log("Received invalid message type %d from kernel CPU",
umsg->type);
return 0;
}
}
return 1;
}
/* len is set to -1 in case of irrecoverable error
/* Returns amount of bytes consumed on success.
* Returns -1 in case of irrecoverable error
* (the session must be dropped and session_end called).
* Returns -2 if the host has requested session reset.
*/
int session_input(void *data, int length) {
return in_packet_fill((uint8_t*)data, length);
}
/* *length is set to -1 in case of irrecoverable error
* (the session must be dropped and session_end called)
*/
void session_poll(void **data, int *len)
void session_poll(void **data, int *length)
{
int l;
if(user_kernel_state == USER_KERNEL_RUNNING) {
if(watchdog_expired()) {
log("Watchdog expired");
*len = -1;
*length = -1;
return;
}
if(!rtiocrg_check()) {
log("RTIO clock failure");
*len = -1;
*length = -1;
return;
}
}
l = get_out_packet_len();
/* If the output buffer is available,
* check if the kernel CPU has something to transmit.
*/
if(l == 0) {
struct msg_base *umsg;
umsg = mailbox_receive();
if(out_packet_available()) {
struct msg_base *umsg = mailbox_receive();
if(umsg) {
if(!process_kmsg(umsg)) {
*len = -1;
*length = -1;
return;
}
}
l = get_out_packet_len();
}
if(l > 0) {
*len = l - buffer_out_index_data;
*data = &buffer_out[buffer_out_index_data];
} else
*len = 0;
out_packet_extract(data, length);
}
void session_ack_data(int len)
void session_ack(int length)
{
buffer_out_index_data += len;
}
void session_ack_mem(int len)
{
buffer_out_index_mem += len;
if(buffer_out_index_mem >= get_out_packet_len())
memset(&buffer_out[4], 0, 4);
out_packet_advance(length);
}

9
soc/runtime/session.h
View File

@ -4,11 +4,8 @@
void session_start(void);
void session_end(void);
int session_input(void *data, int len);
void session_poll(void **data, int *len);
void session_ack_data(int len);
void session_ack_mem(int len);
int rpc(int rpc_num, ...);
int session_input(void *data, int length);
void session_poll(void **data, int *length);
void session_ack(int length);
#endif /* __SESSION_H */