minix/drivers/rtl8139/liveupdate.c
David van Moolenbroek 9ba65d2ea8 This patch switches the MINIX3 ethernet driver stack from a port-based
model to an instance-based model. Each ethernet driver instance is now
responsible for exactly one network interface card. The port field in
/etc/inet.conf now acts as an instance field instead.

This patch also updates the data link protocol. This update:
- eliminates the concept of ports entirely;
- eliminates DL_GETNAME entirely;
- standardizes on using m_source for IPC and DL_ENDPT for safecopies;
- removes error codes from TASK/STAT replies, as they were unused;
- removes a number of other old or unused fields;
- names and renames a few other fields.

All ethernet drivers have been changed to:
- conform to the new protocol, and exactly that;
- take on an instance number based on a given "instance" argument;
- skip that number of PCI devices in probe iterations;
- use config tables and environment variables based on that number;
- no longer be limited to a predefined maximum of cards in any way;
- get rid of any leftover non-safecopy support and other ancient junk;
- have a correct banner protocol figure, or none at all.

Other changes:
* Inet.conf is now taken to be line-based, and supports #-comments.
  No existing installations are expected to be affected by this.
* A new, select-based asynchio library replaces the old one.
  Kindly contributed by Kees J. Bot.
* Inet now supports use of select() on IP devices.
  Combined, the last two changes together speed up dhcpd
  considerably in the presence of multiple interfaces.
* A small bug has been fixed in nonamed.
2010-05-17 22:22:53 +00:00

94 lines
3 KiB
C

#include "rtl8139.h"
/* State management variables. */
EXTERN re_t re_state;
/* Custom states definition. */
#define RL_STATE_READ_PROTOCOL_FREE (SEF_LU_STATE_CUSTOM_BASE + 0)
#define RL_STATE_WRITE_PROTOCOL_FREE (SEF_LU_STATE_CUSTOM_BASE + 1)
#define RL_STATE_IS_CUSTOM(s) \
((s) >= RL_STATE_READ_PROTOCOL_FREE && (s) <= RL_STATE_WRITE_PROTOCOL_FREE)
/* State management helpers. */
PRIVATE int is_reading;
PRIVATE int is_writing;
PRIVATE void load_state_info(void)
{
re_t *rep;
/* Check if we are reading or writing. */
rep = &re_state;
is_reading = !!(rep->re_flags & REF_READING);
is_writing = !!(rep->re_flags & REF_SEND_AVAIL);
}
/*===========================================================================*
* sef_cb_lu_prepare *
*===========================================================================*/
PUBLIC int sef_cb_lu_prepare(int state)
{
int is_ready;
/* Load state information. */
load_state_info();
/* Check if we are ready for the target state. */
is_ready = FALSE;
switch(state) {
/* Standard states. */
case SEF_LU_STATE_REQUEST_FREE:
is_ready = TRUE;
break;
case SEF_LU_STATE_PROTOCOL_FREE:
is_ready = (!is_reading && !is_writing);
break;
/* Custom states. */
case RL_STATE_READ_PROTOCOL_FREE:
is_ready = (!is_reading);
break;
case RL_STATE_WRITE_PROTOCOL_FREE:
is_ready = (!is_writing);
break;
}
/* Tell SEF if we are ready. */
return is_ready ? OK : ENOTREADY;
}
/*===========================================================================*
* sef_cb_lu_state_isvalid *
*===========================================================================*/
PUBLIC int sef_cb_lu_state_isvalid(int state)
{
return SEF_LU_STATE_IS_STANDARD(state) || RL_STATE_IS_CUSTOM(state);
}
/*===========================================================================*
* sef_cb_lu_state_dump *
*===========================================================================*/
PUBLIC void sef_cb_lu_state_dump(int state)
{
/* Load state information. */
load_state_info();
sef_lu_dprint("rtl8139: live update state = %d\n", state);
sef_lu_dprint("rtl8139: is_reading = %d\n", is_reading);
sef_lu_dprint("rtl8139: is_writing = %d\n", is_writing);
sef_lu_dprint("rtl8139: SEF_LU_STATE_WORK_FREE(%d) reached = %d\n",
SEF_LU_STATE_WORK_FREE, TRUE);
sef_lu_dprint("rtl8139: SEF_LU_STATE_REQUEST_FREE(%d) reached = %d\n",
SEF_LU_STATE_REQUEST_FREE, TRUE);
sef_lu_dprint("rtl8139: SEF_LU_STATE_PROTOCOL_FREE(%d) reached = %d\n",
SEF_LU_STATE_PROTOCOL_FREE, (!is_reading && !is_writing));
sef_lu_dprint("rtl8139: RL_STATE_READ_PROTOCOL_FREE(%d) reached = %d\n",
RL_STATE_READ_PROTOCOL_FREE, (!is_reading));
sef_lu_dprint("rtl8139: RL_STATE_WRITE_PROTOCOL_FREE(%d) reached = %d\n",
RL_STATE_WRITE_PROTOCOL_FREE, (!is_writing));
}