diff options
Diffstat (limited to 'hw/net/cadence_gem.c')
| -rw-r--r-- | hw/net/cadence_gem.c | 33 |
1 files changed, 16 insertions, 17 deletions
diff --git a/hw/net/cadence_gem.c b/hw/net/cadence_gem.c index a31801d..b84ee60 100644 --- a/hw/net/cadence_gem.c +++ b/hw/net/cadence_gem.c @@ -592,6 +592,7 @@ static ssize_t gem_receive(NetClientState *nc, const uint8_t *buf, size_t size) unsigned rxbuf_offset; uint8_t rxbuf[2048]; uint8_t *rxbuf_ptr; + bool first_desc = true; s = qemu_get_nic_opaque(nc); @@ -701,6 +702,21 @@ static ssize_t gem_receive(NetClientState *nc, const uint8_t *buf, size_t size) rxbuf_ptr, MIN(bytes_to_copy, rxbufsize)); bytes_to_copy -= MIN(bytes_to_copy, rxbufsize); rxbuf_ptr += MIN(bytes_to_copy, rxbufsize); + + /* Update the descriptor. */ + if (first_desc) { + rx_desc_set_sof(desc); + first_desc = false; + } + if (bytes_to_copy == 0) { + rx_desc_set_eof(desc); + rx_desc_set_length(desc, size); + } + rx_desc_set_ownership(desc); + /* Descriptor write-back. */ + cpu_physical_memory_write(packet_desc_addr, + (uint8_t *)&desc[0], sizeof(desc)); + if (bytes_to_copy == 0) { break; } @@ -716,12 +732,6 @@ static ssize_t gem_receive(NetClientState *nc, const uint8_t *buf, size_t size) DB_PRINT("set length: %ld, EOF on descriptor 0x%x\n", size, (unsigned)packet_desc_addr); - /* Update last descriptor with EOF and total length */ - rx_desc_set_eof(desc); - rx_desc_set_length(desc, size); - cpu_physical_memory_write(packet_desc_addr, - (uint8_t *)&desc[0], sizeof(desc)); - /* Advance RX packet descriptor Q */ last_desc_addr = packet_desc_addr; packet_desc_addr = s->rx_desc_addr; @@ -734,20 +744,9 @@ static ssize_t gem_receive(NetClientState *nc, const uint8_t *buf, size_t size) s->rx_desc_addr += 8; } - DB_PRINT("set SOF, OWN on descriptor 0x%08x\n", (unsigned)packet_desc_addr); - /* Count it */ gem_receive_updatestats(s, buf, size); - /* Update first descriptor (which could also be the last) */ - /* read descriptor */ - cpu_physical_memory_read(packet_desc_addr, - (uint8_t *)&desc[0], sizeof(desc)); - rx_desc_set_sof(desc); - rx_desc_set_ownership(desc); - cpu_physical_memory_write(packet_desc_addr, - (uint8_t *)&desc[0], sizeof(desc)); - s->regs[GEM_RXSTATUS] |= GEM_RXSTATUS_FRMRCVD; s->regs[GEM_ISR] |= GEM_INT_RXCMPL & ~(s->regs[GEM_IMR]); |