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[Qemu-devel] [PATCH] PCnet: Allow more then two TMDs
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] [PATCH] PCnet: Allow more then two TMDs |
Date: |
Tue, 15 Apr 2008 18:48:34 +0200 |
User-agent: |
Thunderbird 2.0.0.12 (X11/20080226) |
A simple fix to let the PCnet emulation handle more than two fragments
for outgoing packets.
There is still a hard-coded limitation of three fragments for incoming
packets, but that didn't hurt so far, even with our test cases (the RX
code is a bit too hairy to remove that limitation without risking
regressions :->).
Signed-off-by: Jan Kiszka <address@hidden>
---
hw/pcnet.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
Index: b/hw/pcnet.c
===================================================================
--- a/hw/pcnet.c
+++ b/hw/pcnet.c
@@ -1249,15 +1249,14 @@ static void pcnet_transmit(PCNetState *s
#endif
if (GET_FIELD(tmd.status, TMDS, STP)) {
s->xmit_pos = 0;
- if (!GET_FIELD(tmd.status, TMDS, ENP)) {
- int bcnt = 4096 - GET_FIELD(tmd.length, TMDL, BCNT);
- s->phys_mem_read(s->dma_opaque, PHYSADDR(s, tmd.tbadr),
- s->buffer, bcnt, CSR_BSWP(s));
- s->xmit_pos += bcnt;
- }
xmit_cxda = PHYSADDR(s,CSR_CXDA(s));
}
- if (GET_FIELD(tmd.status, TMDS, ENP) && (s->xmit_pos >= 0)) {
+ if (!GET_FIELD(tmd.status, TMDS, ENP)) {
+ int bcnt = 4096 - GET_FIELD(tmd.length, TMDL, BCNT);
+ s->phys_mem_read(s->dma_opaque, PHYSADDR(s, tmd.tbadr),
+ s->buffer + s->xmit_pos, bcnt, CSR_BSWP(s));
+ s->xmit_pos += bcnt;
+ } else if (s->xmit_pos >= 0) {
int bcnt = 4096 - GET_FIELD(tmd.length, TMDL, BCNT);
s->phys_mem_read(s->dma_opaque, PHYSADDR(s, tmd.tbadr),
s->buffer + s->xmit_pos, bcnt, CSR_BSWP(s));
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