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Introduce support for asynchronous USB transmission

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libosmo-simtrace2 traditionally had only supported blocking, synchronous
I/O, while other osmocom programs such as remsim-client used
asynchronous USB I/O.

Using async USB I/O for IRQ + IN transfers while using blocking I/O for
OUT transfers doesn't seem to work reliably, so we have to offer a way
to perform the OUT transfers generated within libosmo-simtrace2 in async
mode.

Change-Id: Ib8939bdb7f533cd20a34a30a97f12b782b9816c2
This commit is contained in:
Harald Welte
2020-02-22 16:45:05 +01:00
parent 4e73aaeba8
commit 859f1b0974
3 changed files with 79 additions and 17 deletions
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4
host/include/osmocom/simtrace2/simtrace2_api.h
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@@ -12,6 +12,8 @@ struct osmo_st2_transport {
uint8_t out;
uint8_t irq_in;
} usb_ep;
/* use non-blocking / asynchronous libusb I/O */
bool usb_async;
/* UDP */
int udp_fd;
@@ -39,8 +41,6 @@ struct osmo_st2_cardem_inst {
void *priv;
};
int osmo_st2_transp_tx_msg(struct osmo_st2_transport *transp, struct msgb *msg);
int osmo_st2_slot_tx_msg(struct osmo_st2_slot *slot, struct msgb *msg,
uint8_t msg_class, uint8_t msg_type);