diff options
| -rw-r--r-- | hw/rtl8139.c | 75 |
1 files changed, 60 insertions, 15 deletions
diff --git a/hw/rtl8139.c b/hw/rtl8139.c index 5b2f4891e5..d5459336e5 100644 --- a/hw/rtl8139.c +++ b/hw/rtl8139.c @@ -45,6 +45,7 @@ * 2010-Feb-04 Frediano Ziglio: Rewrote timer support using QEMU timer only * when strictly needed (required for for * Darwin) + * 2011-Mar-22 Benjamin Poirier: Implemented VLAN offloading */ /* For crc32 */ @@ -56,6 +57,7 @@ #include "net.h" #include "loader.h" #include "sysemu.h" +#include "iov.h" /* debug RTL8139 card */ //#define DEBUG_RTL8139 1 @@ -1756,22 +1758,52 @@ static uint32_t rtl8139_RxConfig_read(RTL8139State *s) return ret; } -static void rtl8139_transfer_frame(RTL8139State *s, const uint8_t *buf, int size, int do_interrupt) +static void rtl8139_transfer_frame(RTL8139State *s, uint8_t *buf, int size, + int do_interrupt, const uint8_t *dot1q_buf) { + struct iovec *iov = NULL; + if (!size) { DEBUG_PRINT(("RTL8139: +++ empty ethernet frame\n")); return; } + if (dot1q_buf && size >= ETHER_ADDR_LEN * 2) { + iov = (struct iovec[3]) { + { .iov_base = buf, .iov_len = ETHER_ADDR_LEN * 2 }, + { .iov_base = (void *) dot1q_buf, .iov_len = VLAN_HLEN }, + { .iov_base = buf + ETHER_ADDR_LEN * 2, + .iov_len = size - ETHER_ADDR_LEN * 2 }, + }; + } + if (TxLoopBack == (s->TxConfig & TxLoopBack)) { + size_t buf2_size; + uint8_t *buf2; + + if (iov) { + buf2_size = iov_size(iov, 3); + buf2 = qemu_malloc(buf2_size); + iov_to_buf(iov, 3, buf2, 0, buf2_size); + buf = buf2; + } + DEBUG_PRINT(("RTL8139: +++ transmit loopback mode\n")); rtl8139_do_receive(&s->nic->nc, buf, size, do_interrupt); + + if (iov) { + qemu_free(buf2); + } } else { - qemu_send_packet(&s->nic->nc, buf, size); + if (iov) { + qemu_sendv_packet(&s->nic->nc, iov, 3); + } else { + qemu_send_packet(&s->nic->nc, buf, size); + } } } @@ -1805,7 +1837,7 @@ static int rtl8139_transmit_one(RTL8139State *s, int descriptor) s->TxStatus[descriptor] |= TxHostOwns; s->TxStatus[descriptor] |= TxStatOK; - rtl8139_transfer_frame(s, txbuffer, txsize, 0); + rtl8139_transfer_frame(s, txbuffer, txsize, 0, NULL); DEBUG_PRINT(("RTL8139: +++ transmitted %d bytes from descriptor %d\n", txsize, descriptor)); @@ -1932,7 +1964,6 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s) cpu_physical_memory_read(cplus_tx_ring_desc, (uint8_t *)&val, 4); txdw0 = le32_to_cpu(val); - /* TODO: implement VLAN tagging support, VLAN tag data is read to txdw1 */ cpu_physical_memory_read(cplus_tx_ring_desc+4, (uint8_t *)&val, 4); txdw1 = le32_to_cpu(val); cpu_physical_memory_read(cplus_tx_ring_desc+8, (uint8_t *)&val, 4); @@ -1944,9 +1975,6 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s) descriptor, txdw0, txdw1, txbufLO, txbufHI)); - /* TODO: the following discard cast should clean clang analyzer output */ - (void)txdw1; - /* w0 ownership flag */ #define CP_TX_OWN (1<<31) /* w0 end of ring flag */ @@ -1970,9 +1998,9 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s) /* w0 bits 0...15 : buffer size */ #define CP_TX_BUFFER_SIZE (1<<16) #define CP_TX_BUFFER_SIZE_MASK (CP_TX_BUFFER_SIZE - 1) -/* w1 tag available flag */ -#define CP_RX_TAGC (1<<17) -/* w1 bits 0...15 : VLAN tag */ +/* w1 add tag flag */ +#define CP_TX_TAGC (1<<17) +/* w1 bits 0...15 : VLAN tag (big endian) */ #define CP_TX_VLAN_TAG_MASK ((1<<16) - 1) /* w2 low 32bit of Rx buffer ptr */ /* w3 high 32bit of Rx buffer ptr */ @@ -2072,13 +2100,13 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s) /* update ring data */ val = cpu_to_le32(txdw0); cpu_physical_memory_write(cplus_tx_ring_desc, (uint8_t *)&val, 4); - /* TODO: implement VLAN tagging support, VLAN tag data is read to txdw1 */ -// val = cpu_to_le32(txdw1); -// cpu_physical_memory_write(cplus_tx_ring_desc+4, &val, 4); /* Now decide if descriptor being processed is holding the last segment of packet */ if (txdw0 & CP_TX_LS) { + uint8_t dot1q_buffer_space[VLAN_HLEN]; + uint16_t *dot1q_buffer; + DEBUG_PRINT(("RTL8139: +++ C+ Tx mode : descriptor %d is last segment descriptor\n", descriptor)); /* can transfer fully assembled packet */ @@ -2087,6 +2115,21 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s) int saved_size = s->cplus_txbuffer_offset; int saved_buffer_len = s->cplus_txbuffer_len; + /* create vlan tag */ + if (txdw1 & CP_TX_TAGC) { + /* the vlan tag is in BE byte order in the descriptor + * BE + le_to_cpu() + ~swap()~ = cpu */ + DEBUG_PRINT(("RTL8139: +++ C+ Tx mode : inserting vlan tag with " + "tci: %u\n", bswap16(txdw1 & CP_TX_VLAN_TAG_MASK))); + + dot1q_buffer = (uint16_t *) dot1q_buffer_space; + dot1q_buffer[0] = cpu_to_be16(ETH_P_8021Q); + /* BE + le_to_cpu() + ~cpu_to_le()~ = BE */ + dot1q_buffer[1] = cpu_to_le16(txdw1 & CP_TX_VLAN_TAG_MASK); + } else { + dot1q_buffer = NULL; + } + /* reset the card space to protect from recursive call */ s->cplus_txbuffer = NULL; s->cplus_txbuffer_offset = 0; @@ -2240,7 +2283,8 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s) int tso_send_size = ETH_HLEN + hlen + tcp_hlen + chunk_size; DEBUG_PRINT(("RTL8139: +++ C+ mode TSO transferring packet size %d\n", tso_send_size)); - rtl8139_transfer_frame(s, saved_buffer, tso_send_size, 0); + rtl8139_transfer_frame(s, saved_buffer, tso_send_size, + 0, (uint8_t *) dot1q_buffer); /* add transferred count to TCP sequence number */ p_tcp_hdr->th_seq = cpu_to_be32(chunk_size + be32_to_cpu(p_tcp_hdr->th_seq)); @@ -2313,7 +2357,8 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s) DEBUG_PRINT(("RTL8139: +++ C+ mode transmitting %d bytes packet\n", saved_size)); - rtl8139_transfer_frame(s, saved_buffer, saved_size, 1); + rtl8139_transfer_frame(s, saved_buffer, saved_size, 1, + (uint8_t *) dot1q_buffer); /* restore card space if there was no recursion and reset offset */ if (!s->cplus_txbuffer) |