From 8d61b1e2c4e2ad8310ca957decf26b0b82d37148 Mon Sep 17 00:00:00 2001 From: Finn Thain Date: Wed, 29 Jan 2020 20:27:49 +1100 Subject: dp8393x: Clear descriptor in_use field to release packet When the SONIC receives a packet into the last available descriptor, it retains ownership of that descriptor for as long as necessary. Section 3.4.7 of the datasheet says, When the system appends more descriptors, the SONIC releases ownership of the descriptor after writing 0000h to the RXpkt.in_use field. The packet can now be processed by the host, so raise a PKTRX interrupt, just like the normal case. Signed-off-by: Finn Thain Tested-by: Laurent Vivier Signed-off-by: Jason Wang (cherry picked from commit d9fae13196a31716f45dcddcdd958fbb8e59b35a) Signed-off-by: Michael Roth --- hw/net/dp8393x.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'hw') diff --git a/hw/net/dp8393x.c b/hw/net/dp8393x.c index 0e9061d..4ce2ef8 100644 --- a/hw/net/dp8393x.c +++ b/hw/net/dp8393x.c @@ -809,7 +809,17 @@ static ssize_t dp8393x_receive(NetClientState *nc, const uint8_t * buf, return -1; } /* Link has been updated by host */ + + /* Clear in_use */ + size = sizeof(uint16_t) * width; + address = dp8393x_crda(s) + sizeof(uint16_t) * 6 * width; + dp8393x_put(s, width, 0, 0); + address_space_rw(&s->as, address, MEMTXATTRS_UNSPECIFIED, + (uint8_t *)s->data, size, 1); + + /* Move to next descriptor */ s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA]; + s->regs[SONIC_ISR] |= SONIC_ISR_PKTRX; } /* Save current position */ -- cgit v1.1