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| author | Lucas Dietrich <ld.adecy@gmail.com> | 2022-08-29 22:00:46 +0200 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2022-09-22 16:38:28 +0100 |
| commit | 895a803ce91704f28c9b49621a4f589273289f1e (patch) | |
| tree | 681ed1ca1a7f1ba7de45de326ad1e60b26cfa4d9 /hw/net | |
| parent | d4424bebceaa8ffbc23060ce45e52a9bb817e3c9 (diff) | |
| download | qemu-895a803ce91704f28c9b49621a4f589273289f1e.zip qemu-895a803ce91704f28c9b49621a4f589273289f1e.tar.gz qemu-895a803ce91704f28c9b49621a4f589273289f1e.tar.bz2 | |
hw/net/lan9118: Signal TSFL_INT flag when TX FIFO reaches specified level
The LAN9118 allows the guest to specify a level for both the TX and
RX FIFOs at which an interrupt will be generated. We implement the
RSFL_INT interrupt for the RX FIFO but are missing the handling of
the equivalent TSFL_INT for the TX FIFO. Add the missing test to set
the interrupt if the TX FIFO has exceeded the guest-specified level.
This flag is required for Micrium lan911x ethernet driver to work.
Signed-off-by: Lucas Dietrich <ld.adecy@gmail.com>
[PMM: Tweaked commit message and comment]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/net')
| -rw-r--r-- | hw/net/lan9118.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/hw/net/lan9118.c b/hw/net/lan9118.c index 456ae38..f1cba55 100644 --- a/hw/net/lan9118.c +++ b/hw/net/lan9118.c @@ -696,6 +696,14 @@ static void do_tx_packet(lan9118_state *s) n = (s->tx_status_fifo_head + s->tx_status_fifo_used) & 511; s->tx_status_fifo[n] = status; s->tx_status_fifo_used++; + + /* + * Generate TSFL interrupt if TX FIFO level exceeds the level + * specified in the FIFO_INT TX Status Level field. + */ + if (s->tx_status_fifo_used > ((s->fifo_int >> 16) & 0xff)) { + s->int_sts |= TSFL_INT; + } if (s->tx_status_fifo_used == 512) { s->int_sts |= TSFF_INT; /* TODO: Stop transmission. */ |