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https://github.com/qemu/qemu.git
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fixed for TCP segmentation offloading - removed dependency on slirp.h (Igor Kovalenko)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2046 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard
parent
0de6bb73fd
commit
718da2b9b0
341
hw/rtl8139.c
341
hw/rtl8139.c
@ -33,13 +33,18 @@
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* Implemented PCI timer interrupt (disabled by default)
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* Implemented Tally Counters, increased VM load/save version
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* Implemented IP/TCP/UDP checksum task offloading
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*
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* 2006-Jul-04 Igor Kovalenko : Implemented TCP segmentation offloading
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* Fixed MTU=1500 for produced ethernet frames
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*
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* 2006-Jul-09 Igor Kovalenko : Fixed TCP header length calculation while processing
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* segmentation offloading
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* Removed slirp.h dependency
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* Added rx/tx buffer reset when enabling rx/tx operation
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*/
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#include "vl.h"
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/* XXX: such dependency must be suppressed */
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#include <slirp/slirp.h>
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/* debug RTL8139 card */
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//#define DEBUG_RTL8139 1
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@ -1364,10 +1369,14 @@ static void rtl8139_ChipCmd_write(RTL8139State *s, uint32_t val)
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if (val & CmdRxEnb)
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{
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DEBUG_PRINT(("RTL8139: ChipCmd enable receiver\n"));
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s->currCPlusRxDesc = 0;
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}
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if (val & CmdTxEnb)
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{
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DEBUG_PRINT(("RTL8139: ChipCmd enable transmitter\n"));
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s->currCPlusTxDesc = 0;
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}
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/* mask unwriteable bits */
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@ -1732,6 +1741,25 @@ static uint32_t rtl8139_RxConfig_read(RTL8139State *s)
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return ret;
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}
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static void rtl8139_transfer_frame(RTL8139State *s, const uint8_t *buf, int size, int do_interrupt)
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{
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if (!size)
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{
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DEBUG_PRINT(("RTL8139: +++ empty ethernet frame\n"));
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return;
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}
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if (TxLoopBack == (s->TxConfig & TxLoopBack))
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{
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DEBUG_PRINT(("RTL8139: +++ transmit loopback mode\n"));
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rtl8139_do_receive(s, buf, size, do_interrupt);
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}
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else
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{
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qemu_send_packet(s->vc, buf, size);
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}
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}
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static int rtl8139_transmit_one(RTL8139State *s, int descriptor)
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{
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if (!rtl8139_transmitter_enabled(s))
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@ -1762,15 +1790,7 @@ static int rtl8139_transmit_one(RTL8139State *s, int descriptor)
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s->TxStatus[descriptor] |= TxHostOwns;
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s->TxStatus[descriptor] |= TxStatOK;
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if (TxLoopBack == (s->TxConfig & TxLoopBack))
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{
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DEBUG_PRINT(("RTL8139: +++ transmit loopback mode\n"));
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rtl8139_do_receive(s, txbuffer, txsize, 0);
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}
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else
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{
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qemu_send_packet(s->vc, txbuffer, txsize);
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}
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rtl8139_transfer_frame(s, txbuffer, txsize, 0);
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DEBUG_PRINT(("RTL8139: +++ transmitted %d bytes from descriptor %d\n", txsize, descriptor));
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@ -1781,6 +1801,93 @@ static int rtl8139_transmit_one(RTL8139State *s, int descriptor)
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return 1;
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}
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/* structures and macros for task offloading */
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typedef struct ip_header
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{
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uint8_t ip_ver_len; /* version and header length */
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uint8_t ip_tos; /* type of service */
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uint16_t ip_len; /* total length */
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uint16_t ip_id; /* identification */
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uint16_t ip_off; /* fragment offset field */
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uint8_t ip_ttl; /* time to live */
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uint8_t ip_p; /* protocol */
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uint16_t ip_sum; /* checksum */
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uint32_t ip_src,ip_dst; /* source and dest address */
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} ip_header;
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#define IP_HEADER_VERSION_4 4
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#define IP_HEADER_VERSION(ip) ((ip->ip_ver_len >> 4)&0xf)
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#define IP_HEADER_LENGTH(ip) (((ip->ip_ver_len)&0xf) << 2)
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typedef struct tcp_header
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{
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uint16_t th_sport; /* source port */
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uint16_t th_dport; /* destination port */
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uint32_t th_seq; /* sequence number */
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uint32_t th_ack; /* acknowledgement number */
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uint16_t th_offset_flags; /* data offset, reserved 6 bits, TCP protocol flags */
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uint16_t th_win; /* window */
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uint16_t th_sum; /* checksum */
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uint16_t th_urp; /* urgent pointer */
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} tcp_header;
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typedef struct udp_header
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{
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uint16_t uh_sport; /* source port */
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uint16_t uh_dport; /* destination port */
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uint16_t uh_ulen; /* udp length */
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uint16_t uh_sum; /* udp checksum */
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} udp_header;
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typedef struct ip_pseudo_header
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{
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uint32_t ip_src;
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uint32_t ip_dst;
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uint8_t zeros;
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uint8_t ip_proto;
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uint16_t ip_payload;
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} ip_pseudo_header;
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#define IP_PROTO_TCP 6
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#define IP_PROTO_UDP 17
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#define TCP_HEADER_DATA_OFFSET(tcp) (((be16_to_cpu(tcp->th_offset_flags) >> 12)&0xf) << 2)
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#define TCP_FLAGS_ONLY(flags) ((flags)&0x3f)
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#define TCP_HEADER_FLAGS(tcp) TCP_FLAGS_ONLY(be16_to_cpu(tcp->th_offset_flags))
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#define TCP_HEADER_CLEAR_FLAGS(tcp, off) ((tcp)->th_offset_flags &= cpu_to_be16(~TCP_FLAGS_ONLY(off)))
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#define TCP_FLAG_FIN 0x01
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#define TCP_FLAG_PUSH 0x08
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/* produces ones' complement sum of data */
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static uint16_t ones_complement_sum(uint8_t *data, size_t len)
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{
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uint32_t result = 0;
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for (; len > 1; data+=2, len-=2)
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{
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result += *(uint16_t*)data;
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}
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/* add the remainder byte */
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if (len)
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{
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uint8_t odd[2] = {*data, 0};
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result += *(uint16_t*)odd;
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}
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while (result>>16)
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result = (result & 0xffff) + (result >> 16);
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return result;
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}
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static uint16_t ip_checksum(void *data, size_t len)
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{
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return ~ones_complement_sum((uint8_t*)data, len);
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}
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static int rtl8139_cplus_transmit_one(RTL8139State *s)
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{
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if (!rtl8139_transmitter_enabled(s))
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@ -1831,6 +1938,9 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s)
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#define CP_TX_LS (1<<28)
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/* large send packet flag */
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#define CP_TX_LGSEN (1<<27)
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/* large send MSS mask, bits 16...25 */
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#define CP_TC_LGSEN_MSS_MASK ((1 << 12) - 1)
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/* IP checksum offload flag */
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#define CP_TX_IPCS (1<<18)
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/* UDP checksum offload flag */
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@ -1885,6 +1995,8 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s)
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s->cplus_txbuffer_len = CP_TX_BUFFER_SIZE;
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s->cplus_txbuffer = malloc(s->cplus_txbuffer_len);
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s->cplus_txbuffer_offset = 0;
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DEBUG_PRINT(("RTL8139: +++ C+ mode transmission buffer allocated space %d\n", s->cplus_txbuffer_len));
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}
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while (s->cplus_txbuffer && s->cplus_txbuffer_offset + txsize >= s->cplus_txbuffer_len)
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@ -1960,35 +2072,41 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s)
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s->cplus_txbuffer_offset = 0;
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s->cplus_txbuffer_len = 0;
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if (txdw0 & (CP_TX_IPCS | CP_TX_UDPCS | CP_TX_TCPCS))
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if (txdw0 & (CP_TX_IPCS | CP_TX_UDPCS | CP_TX_TCPCS | CP_TX_LGSEN))
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{
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DEBUG_PRINT(("RTL8139: +++ C+ mode offloaded task checksum\n"));
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#define ETH_P_IP 0x0800 /* Internet Protocol packet */
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#define ETH_HLEN 14
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#define ETH_MTU 1500
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/* ip packet header */
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register struct ip *ip = 0;
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ip_header *ip = 0;
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int hlen = 0;
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uint8_t ip_protocol = 0;
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uint16_t ip_data_len = 0;
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struct mbuf local_m;
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uint8_t *eth_payload_data = 0;
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size_t eth_payload_len = 0;
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int proto = ntohs(*(uint16_t *)(saved_buffer + 12));
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int proto = be16_to_cpu(*(uint16_t *)(saved_buffer + 12));
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if (proto == ETH_P_IP)
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{
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DEBUG_PRINT(("RTL8139: +++ C+ mode has IP packet\n"));
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/* not aligned */
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local_m.m_data = saved_buffer + ETH_HLEN;
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local_m.m_len = saved_size - ETH_HLEN;
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eth_payload_data = saved_buffer + ETH_HLEN;
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eth_payload_len = saved_size - ETH_HLEN;
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ip = mtod(&local_m, struct ip *);
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ip = (ip_header*)eth_payload_data;
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if (ip->ip_v != IPVERSION) {
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DEBUG_PRINT(("RTL8139: +++ C+ mode packet has bad IP version %d expected %d\n", ip->ip_v, IPVERSION));
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if (IP_HEADER_VERSION(ip) != IP_HEADER_VERSION_4) {
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DEBUG_PRINT(("RTL8139: +++ C+ mode packet has bad IP version %d expected %d\n", IP_HEADER_VERSION(ip), IP_HEADER_VERSION_4));
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ip = NULL;
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} else {
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hlen = ip->ip_hl << 2;
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hlen = IP_HEADER_LENGTH(ip);
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ip_protocol = ip->ip_p;
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ip_data_len = be16_to_cpu(ip->ip_len) - hlen;
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}
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}
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@ -1998,84 +2116,178 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s)
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{
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DEBUG_PRINT(("RTL8139: +++ C+ mode need IP checksum\n"));
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if (hlen<sizeof(struct ip ) || hlen>local_m.m_len) {/* min header length */
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if (hlen<sizeof(ip_header) || hlen>eth_payload_len) {/* min header length */
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/* bad packet header len */
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/* or packet too short */
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}
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else
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{
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ip->ip_sum = 0;
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ip->ip_sum = cksum(&local_m, hlen);
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ip->ip_sum = ip_checksum(ip, hlen);
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DEBUG_PRINT(("RTL8139: +++ C+ mode IP header len=%d checksum=%04x\n", hlen, ip->ip_sum));
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}
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}
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if (txdw0 & (CP_TX_TCPCS|CP_TX_UDPCS))
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if ((txdw0 & CP_TX_LGSEN) && ip_protocol == IP_PROTO_TCP)
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{
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DEBUG_PRINT(("RTL8139: +++ C+ mode need TCP or UDP checksum\n"));
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#if defined (DEBUG_RTL8139)
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int large_send_mss = (txdw0 >> 16) & CP_TC_LGSEN_MSS_MASK;
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#endif
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DEBUG_PRINT(("RTL8139: +++ C+ mode offloaded task TSO MTU=%d IP data %d frame data %d specified MSS=%d\n",
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ETH_MTU, ip_data_len, saved_size - ETH_HLEN, large_send_mss));
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u_int8_t ip_protocol = ip->ip_p;
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u_int16_t ip_data_len = ntohs(ip->ip_len) - hlen;
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int tcp_send_offset = 0;
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int send_count = 0;
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/* maximum IP header length is 60 bytes */
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uint8_t saved_ip_header[60];
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memcpy(saved_ip_header, local_m.m_data, hlen);
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struct mbuf local_checksum_m;
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/* save IP header template; data area is used in tcp checksum calculation */
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memcpy(saved_ip_header, eth_payload_data, hlen);
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local_checksum_m.m_data = local_m.m_data + hlen - 12;
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local_checksum_m.m_len = local_m.m_len - hlen + 12;
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/* a placeholder for checksum calculation routine in tcp case */
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uint8_t *data_to_checksum = eth_payload_data + hlen - 12;
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// size_t data_to_checksum_len = eth_payload_len - hlen + 12;
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/* add 4 TCP pseudoheader fields */
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/* copy IP source and destination fields */
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memcpy(local_checksum_m.m_data, saved_ip_header + 12, 8);
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/* pointer to TCP header */
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tcp_header *p_tcp_hdr = (tcp_header*)(eth_payload_data + hlen);
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if ((txdw0 & CP_TX_TCPCS) && ip_protocol == IPPROTO_TCP)
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int tcp_hlen = TCP_HEADER_DATA_OFFSET(p_tcp_hdr);
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/* ETH_MTU = ip header len + tcp header len + payload */
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int tcp_data_len = ip_data_len - tcp_hlen;
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int tcp_chunk_size = ETH_MTU - hlen - tcp_hlen;
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DEBUG_PRINT(("RTL8139: +++ C+ mode TSO IP data len %d TCP hlen %d TCP data len %d TCP chunk size %d\n",
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ip_data_len, tcp_hlen, tcp_data_len, tcp_chunk_size));
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/* note the cycle below overwrites IP header data,
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but restores it from saved_ip_header before sending packet */
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int is_last_frame = 0;
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for (tcp_send_offset = 0; tcp_send_offset < tcp_data_len; tcp_send_offset += tcp_chunk_size)
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{
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DEBUG_PRINT(("RTL8139: +++ C+ mode calculating TCP checksum for packet with %d bytes data\n", ip_data_len));
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uint16_t chunk_size = tcp_chunk_size;
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struct tcpiphdr * p_tcpip_hdr = (struct tcpiphdr *)local_checksum_m.m_data;
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p_tcpip_hdr->ti_x1 = 0;
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p_tcpip_hdr->ti_pr = IPPROTO_TCP;
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p_tcpip_hdr->ti_len = htons(ip_data_len);
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/* check if this is the last frame */
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if (tcp_send_offset + tcp_chunk_size >= tcp_data_len)
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{
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is_last_frame = 1;
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chunk_size = tcp_data_len - tcp_send_offset;
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}
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struct tcphdr* p_tcp_hdr = (struct tcphdr*) (local_checksum_m.m_data+12);
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DEBUG_PRINT(("RTL8139: +++ C+ mode TSO TCP seqno %08x\n", be32_to_cpu(p_tcp_hdr->th_seq)));
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/* add 4 TCP pseudoheader fields */
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/* copy IP source and destination fields */
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memcpy(data_to_checksum, saved_ip_header + 12, 8);
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DEBUG_PRINT(("RTL8139: +++ C+ mode TSO calculating TCP checksum for packet with %d bytes data\n", tcp_hlen + chunk_size));
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if (tcp_send_offset)
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{
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memcpy((uint8_t*)p_tcp_hdr + tcp_hlen, (uint8_t*)p_tcp_hdr + tcp_hlen + tcp_send_offset, chunk_size);
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}
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/* keep PUSH and FIN flags only for the last frame */
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if (!is_last_frame)
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{
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TCP_HEADER_CLEAR_FLAGS(p_tcp_hdr, TCP_FLAG_PUSH|TCP_FLAG_FIN);
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}
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/* recalculate TCP checksum */
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ip_pseudo_header *p_tcpip_hdr = (ip_pseudo_header *)data_to_checksum;
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p_tcpip_hdr->zeros = 0;
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p_tcpip_hdr->ip_proto = IP_PROTO_TCP;
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p_tcpip_hdr->ip_payload = cpu_to_be16(tcp_hlen + chunk_size);
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p_tcp_hdr->th_sum = 0;
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int tcp_checksum = cksum(&local_checksum_m, ip_data_len + 12);
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int tcp_checksum = ip_checksum(data_to_checksum, tcp_hlen + chunk_size + 12);
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DEBUG_PRINT(("RTL8139: +++ C+ mode TSO TCP checksum %04x\n", tcp_checksum));
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p_tcp_hdr->th_sum = tcp_checksum;
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/* restore IP header */
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memcpy(eth_payload_data, saved_ip_header, hlen);
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/* set IP data length and recalculate IP checksum */
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ip->ip_len = cpu_to_be16(hlen + tcp_hlen + chunk_size);
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/* increment IP id for subsequent frames */
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ip->ip_id = cpu_to_be16(tcp_send_offset/tcp_chunk_size + be16_to_cpu(ip->ip_id));
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ip->ip_sum = 0;
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ip->ip_sum = ip_checksum(eth_payload_data, hlen);
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DEBUG_PRINT(("RTL8139: +++ C+ mode TSO IP header len=%d checksum=%04x\n", hlen, ip->ip_sum));
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int tso_send_size = ETH_HLEN + hlen + tcp_hlen + chunk_size;
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DEBUG_PRINT(("RTL8139: +++ C+ mode TSO transferring packet size %d\n", tso_send_size));
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rtl8139_transfer_frame(s, saved_buffer, tso_send_size, 0);
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/* add transferred count to TCP sequence number */
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p_tcp_hdr->th_seq = cpu_to_be32(chunk_size + be32_to_cpu(p_tcp_hdr->th_seq));
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++send_count;
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}
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/* Stop sending this frame */
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saved_size = 0;
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}
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else if (txdw0 & (CP_TX_TCPCS|CP_TX_UDPCS))
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{
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DEBUG_PRINT(("RTL8139: +++ C+ mode need TCP or UDP checksum\n"));
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/* maximum IP header length is 60 bytes */
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uint8_t saved_ip_header[60];
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memcpy(saved_ip_header, eth_payload_data, hlen);
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uint8_t *data_to_checksum = eth_payload_data + hlen - 12;
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// size_t data_to_checksum_len = eth_payload_len - hlen + 12;
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/* add 4 TCP pseudoheader fields */
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/* copy IP source and destination fields */
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memcpy(data_to_checksum, saved_ip_header + 12, 8);
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if ((txdw0 & CP_TX_TCPCS) && ip_protocol == IP_PROTO_TCP)
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||||
{
|
||||
DEBUG_PRINT(("RTL8139: +++ C+ mode calculating TCP checksum for packet with %d bytes data\n", ip_data_len));
|
||||
|
||||
ip_pseudo_header *p_tcpip_hdr = (ip_pseudo_header *)data_to_checksum;
|
||||
p_tcpip_hdr->zeros = 0;
|
||||
p_tcpip_hdr->ip_proto = IP_PROTO_TCP;
|
||||
p_tcpip_hdr->ip_payload = cpu_to_be16(ip_data_len);
|
||||
|
||||
tcp_header* p_tcp_hdr = (tcp_header *) (data_to_checksum+12);
|
||||
|
||||
p_tcp_hdr->th_sum = 0;
|
||||
|
||||
int tcp_checksum = ip_checksum(data_to_checksum, ip_data_len + 12);
|
||||
DEBUG_PRINT(("RTL8139: +++ C+ mode TCP checksum %04x\n", tcp_checksum));
|
||||
|
||||
p_tcp_hdr->th_sum = tcp_checksum;
|
||||
}
|
||||
else if ((txdw0 & CP_TX_UDPCS) && ip_protocol == IPPROTO_UDP)
|
||||
else if ((txdw0 & CP_TX_UDPCS) && ip_protocol == IP_PROTO_UDP)
|
||||
{
|
||||
DEBUG_PRINT(("RTL8139: +++ C+ mode calculating UDP checksum for packet with %d bytes data\n", ip_data_len));
|
||||
|
||||
struct udpiphdr * p_udpip_hdr = (struct udpiphdr *)local_checksum_m.m_data;
|
||||
p_udpip_hdr->ui_x1 = 0;
|
||||
p_udpip_hdr->ui_pr = IPPROTO_UDP;
|
||||
p_udpip_hdr->ui_len = htons(ip_data_len);
|
||||
ip_pseudo_header *p_udpip_hdr = (ip_pseudo_header *)data_to_checksum;
|
||||
p_udpip_hdr->zeros = 0;
|
||||
p_udpip_hdr->ip_proto = IP_PROTO_UDP;
|
||||
p_udpip_hdr->ip_payload = cpu_to_be16(ip_data_len);
|
||||
|
||||
struct udphdr* p_udp_hdr = (struct udphdr*) (local_checksum_m.m_data+12);
|
||||
udp_header *p_udp_hdr = (udp_header *) (data_to_checksum+12);
|
||||
|
||||
int old_csum = p_udp_hdr->uh_sum;
|
||||
p_udp_hdr->uh_sum = 0;
|
||||
|
||||
int udp_checksum = cksum(&local_checksum_m, ip_data_len + 12);
|
||||
int udp_checksum = ip_checksum(data_to_checksum, ip_data_len + 12);
|
||||
DEBUG_PRINT(("RTL8139: +++ C+ mode UDP checksum %04x\n", udp_checksum));
|
||||
|
||||
if (old_csum != udp_checksum)
|
||||
{
|
||||
DEBUG_PRINT(("RTL8139: +++ C+ mode UDP checksum mismatch old=%04x new=%04x\n",
|
||||
old_csum, udp_checksum));
|
||||
}
|
||||
|
||||
p_udp_hdr->uh_sum = udp_checksum;
|
||||
}
|
||||
|
||||
/* restore IP header */
|
||||
memcpy(local_m.m_data, saved_ip_header, hlen);
|
||||
memcpy(eth_payload_data, saved_ip_header, hlen);
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -2085,16 +2297,7 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s)
|
||||
|
||||
DEBUG_PRINT(("RTL8139: +++ C+ mode transmitting %d bytes packet\n", saved_size));
|
||||
|
||||
if (TxLoopBack == (s->TxConfig & TxLoopBack))
|
||||
{
|
||||
DEBUG_PRINT(("RTL8139: +++ C+ transmit loopback mode\n"));
|
||||
rtl8139_receive(s, saved_buffer, saved_size);
|
||||
}
|
||||
else
|
||||
{
|
||||
/* transmit the packet */
|
||||
qemu_send_packet(s->vc, saved_buffer, saved_size);
|
||||
}
|
||||
rtl8139_transfer_frame(s, saved_buffer, saved_size, 1);
|
||||
|
||||
/* restore card space if there was no recursion and reset offset */
|
||||
if (!s->cplus_txbuffer)
|
||||
@ -2253,8 +2456,6 @@ static void rtl8139_TxAddr_write(RTL8139State *s, uint32_t txAddrOffset, uint32_
|
||||
DEBUG_PRINT(("RTL8139: TxAddr write offset=0x%x val=0x%08x\n", txAddrOffset, val));
|
||||
|
||||
s->TxAddr[txAddrOffset/4] = le32_to_cpu(val);
|
||||
|
||||
s->currCPlusTxDesc = 0;
|
||||
}
|
||||
|
||||
static uint32_t rtl8139_TxAddr_read(RTL8139State *s, uint32_t txAddrOffset)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user