50 lines
1.8 KiB
Diff
50 lines
1.8 KiB
Diff
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From 8b72b72180276e4f0af962e60fead6bdbe0e0577 Mon Sep 17 00:00:00 2001
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From: tangbinzy <tangbin_yewu@cmss.chinamobile.com>
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Date: Tue, 10 Sep 2024 11:42:12 +0000
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Subject: [PATCH] hw/net/lan9118: Signal TSFL_INT flag when TX FIFO reaches
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specified level mainline inclusion commit
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895a803ce91704f28c9b49621a4f589273289f1e category: bugfix
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---------------------------------------------------------------
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The LAN9118 allows the guest to specify a level for both the TX and
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RX FIFOs at which an interrupt will be generated. We implement the
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RSFL_INT interrupt for the RX FIFO but are missing the handling of
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the equivalent TSFL_INT for the TX FIFO. Add the missing test to set
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the interrupt if the TX FIFO has exceeded the guest-specified level.
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This flag is required for Micrium lan911x ethernet driver to work.
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Signed-off-by: Lucas Dietrich <ld.adecy@gmail.com>
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[PMM: Tweaked commit message and comment]
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Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
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Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Signed-off-by: tangbinzy <tangbin_yewu@cmss.chinamobile.com>
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---
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hw/net/lan9118.c | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/hw/net/lan9118.c b/hw/net/lan9118.c
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index fa43758105..9897296c21 100644
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--- a/hw/net/lan9118.c
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+++ b/hw/net/lan9118.c
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@@ -702,6 +702,14 @@ static void do_tx_packet(lan9118_state *s)
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n = (s->tx_status_fifo_head + s->tx_status_fifo_used) & 511;
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s->tx_status_fifo[n] = status;
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s->tx_status_fifo_used++;
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+
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+ /*
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+ * Generate TSFL interrupt if TX FIFO level exceeds the level
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+ * specified in the FIFO_INT TX Status Level field.
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+ */
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+ if (s->tx_status_fifo_used > ((s->fifo_int >> 16) & 0xff)) {
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+ s->int_sts |= TSFL_INT;
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+ }
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if (s->tx_status_fifo_used == 512) {
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s->int_sts |= TSFF_INT;
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/* TODO: Stop transmission. */
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--
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2.41.0.windows.1
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