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PDP11, VAX: Added Ethernet packet transmission throttling support to XQ and XU devices.

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Migrated the XQ help to the hierarchical help model.  This is a work in progress which will eventually merge much from 0readme_ethernet.txt into the device help.
This commit is contained in:
Mark Pizzolato
2014-06-06 15:03:31 -07:00
parent 753e4dc925
commit e9b312f26a
7 changed files with 470 additions and 61 deletions
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14
sim_ether.h
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@@ -268,6 +268,19 @@ struct eth_device {
uint32 dbit; /* debugging bit */
int reflections; /* packet reflections on interface */
int need_crc; /* device needs CRC (Cyclic Redundancy Check) */
/* Throttling control parameters: */
uint32 throttle_time; /* ms burst time window */
#define ETH_THROT_DEFAULT_TIME 5 /* 5ms Default burst time window */
uint32 throttle_burst; /* packets passed with throttle_time which trigger throttling */
#define ETH_THROT_DEFAULT_BURST 4 /* 4 Packet burst in time window */
uint32 throttle_delay; /* ms to delay when throttling. 0 disables throttling */
#define ETH_THROT_DISABLED_DELAY 0 /* 0 Delay disables throttling */
#define ETH_THROT_DEFAULT_DELAY 10 /* 10ms Delay during burst */
/* Throttling state variables: */
uint32 throttle_mask; /* match test for threshold detection (1 << throttle_burst) - 1 */
uint32 throttle_events; /* keeps track of packet arrival values */
uint32 throttle_packet_time; /* time last packet was transmitted */
uint32 throttle_count; /* Total Throttle Delays */
#if defined (USE_READER_THREAD)
int asynch_io; /* Asynchronous Interrupt scheduling enabled */
int asynch_io_latency; /* instructions to delay pending interrupt */
@@ -315,6 +328,7 @@ int eth_devices (int max, ETH_LIST* dev); /* get ethernet devices
void eth_setcrc (ETH_DEV* dev, int need_crc); /* enable/disable CRC mode */
t_stat eth_set_async (ETH_DEV* dev, int latency); /* set read behavior to be async */
t_stat eth_clr_async (ETH_DEV* dev); /* set read behavior to be not async */
t_stat eth_set_throttle (ETH_DEV* dev, uint32 time, uint32 burst, uint32 delay); /* set transmit throttle parameters */
uint32 eth_crc32(uint32 crc, const void* vbuf, size_t len); /* Compute Ethernet Autodin II CRC for buffer */
void eth_packet_trace (ETH_DEV* dev, const uint8 *msg, int len, char* txt); /* trace ethernet packet header+crc */