virtio_net: use new libnetdriver
Change-Id: Id06bdb67da12477984b42bbd46623bd8f25c0ab9
This commit is contained in:
David van Moolenbroek
parent
d76bd1f07c
commit
5260f07c2c
1 changed files with 163 additions and 382 deletions
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@ -22,11 +22,18 @@
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#include "virtio_net.h"
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#define VERBOSE 0
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#if VERBOSE
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#define dput(s) do { dprintf(s); printf("\n"); } while (0)
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#define dprintf(s) do { \
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printf("%s: ", name); \
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printf s; \
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} while (0)
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#else
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#define dput(s)
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#define dprintf(s)
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#endif
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static struct virtio_device *net_dev;
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@ -50,6 +57,7 @@ struct packet {
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phys_bytes phdr;
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char *vdata;
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phys_bytes pdata;
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size_t len;
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STAILQ_ENTRY(packet) next;
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};
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@ -60,7 +68,6 @@ static struct virtio_net_hdr *hdrs_vir;
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static phys_bytes hdrs_phys;
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static struct packet *packets;
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static int in_rx;
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static int started;
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/* Packets on this list can be given to the host */
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static STAILQ_HEAD(free_list, packet) free_list;
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@ -68,21 +75,13 @@ static STAILQ_HEAD(free_list, packet) free_list;
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/* Packets on this list are to be given to inet */
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static STAILQ_HEAD(recv_list, packet) recv_list;
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/* State about pending inet messages */
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static int rx_pending;
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static message pending_rx_msg;
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static int tx_pending;
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static message pending_tx_msg;
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/* Various state data */
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static u8_t virtio_net_mac[6];
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static eth_stat_t virtio_net_stats;
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static int spurious_interrupt;
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/* Prototypes */
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static int virtio_net_probe(int skip);
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static int virtio_net_config(void);
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static int virtio_net_probe(unsigned int skip);
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static void virtio_net_config(ether_addr_t *addr);
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static int virtio_net_alloc_bufs(void);
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static void virtio_net_init_queues(void);
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@ -90,28 +89,24 @@ static void virtio_net_refill_rx_queue(void);
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static void virtio_net_check_queues(void);
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static void virtio_net_check_pending(void);
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static void virtio_net_fetch_iovec(iovec_s_t *iov, message *m,
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cp_grant_id_t grant, size_t count);
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static int virtio_net_cpy_to_user(message *m);
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static int virtio_net_cpy_from_user(message *m);
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static void virtio_net_intr(message *m);
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static void virtio_net_write(message *m);
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static void virtio_net_read(message *m);
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static void virtio_net_conf(message *m);
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static void virtio_net_getstat(message *m);
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static void virtio_net_notify(message *m);
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static void virtio_net_msg(message *m);
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static void virtio_net_main_loop(void);
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static void sef_local_startup(void);
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static int sef_cb_init_fresh(int type, sef_init_info_t *info);
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static void sef_cb_signal_handler(int signo);
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static int virtio_net_init(unsigned int instance, ether_addr_t *addr);
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static void virtio_net_stop(void);
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static int virtio_net_send(struct netdriver_data *data, size_t len);
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static ssize_t virtio_net_recv(struct netdriver_data *data, size_t max);
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static void virtio_net_stat(eth_stat_t *stat);
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static void virtio_net_intr(unsigned int mask);
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static const struct netdriver virtio_net_table = {
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.ndr_init = virtio_net_init,
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.ndr_stop = virtio_net_stop,
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.ndr_recv = virtio_net_recv,
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.ndr_send = virtio_net_send,
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.ndr_stat = virtio_net_stat,
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.ndr_intr = virtio_net_intr,
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};
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/* TODO: Features are pretty much ignored */
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struct virtio_feature netf[] = {
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static struct virtio_feature netf[] = {
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{ "partial csum", VIRTIO_NET_F_CSUM, 0, 0 },
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{ "given mac", VIRTIO_NET_F_MAC, 0, 1 },
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{ "status ", VIRTIO_NET_F_STATUS, 0, 0 },
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@ -120,7 +115,7 @@ struct virtio_feature netf[] = {
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};
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static int
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virtio_net_probe(int skip)
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virtio_net_probe(unsigned int skip)
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{
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/* virtio-net has at least 2 queues */
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int queues = 2;
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@ -142,8 +137,8 @@ virtio_net_probe(int skip)
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return OK;
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}
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static int
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virtio_net_config(void)
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static void
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virtio_net_config(ether_addr_t * addr)
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{
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u32_t mac14;
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u32_t mac56;
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@ -153,12 +148,12 @@ virtio_net_config(void)
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dprintf(("Mac set by host: "));
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mac14 = virtio_sread32(net_dev, 0);
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mac56 = virtio_sread32(net_dev, 4);
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*(u32_t*)virtio_net_mac = mac14;
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*(u16_t*)(virtio_net_mac + 4) = mac56;
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memcpy(&addr->ea_addr[0], &mac14, 4);
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memcpy(&addr->ea_addr[4], &mac56, 2);
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for (i = 0; i < 6; i++)
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printf("%02x%s", virtio_net_mac[i],
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i == 5 ? "\n" : ":");
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dprintf(("%02x%s", addr->ea_addr[i],
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i == 5 ? "\n" : ":"));
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} else {
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dput(("No mac"));
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}
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@ -174,8 +169,6 @@ virtio_net_config(void)
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if (virtio_host_supports(net_dev, VIRTIO_NET_F_CTRL_RX))
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dput(("Host supports control channel for RX"));
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return OK;
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}
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static int
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@ -233,7 +226,6 @@ virtio_net_refill_rx_queue(void)
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struct packet *p;
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while ((in_rx < BUF_PACKETS / 2) && !STAILQ_EMPTY(&free_list)) {
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/* peek */
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p = STAILQ_FIRST(&free_list);
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/* remove */
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@ -253,7 +245,6 @@ virtio_net_refill_rx_queue(void)
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virtio_to_queue(net_dev, RX_Q, phys, 2, p);
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in_rx++;
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}
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if (in_rx == 0 && STAILQ_EMPTY(&free_list)) {
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@ -266,15 +257,18 @@ static void
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virtio_net_check_queues(void)
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{
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struct packet *p;
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size_t len;
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/* Put the received packets into the recv list */
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while (virtio_from_queue(net_dev, RX_Q, (void **)&p, NULL) == 0) {
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while (virtio_from_queue(net_dev, RX_Q, (void **)&p, &len) == 0) {
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p->len = len;
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STAILQ_INSERT_TAIL(&recv_list, p, next);
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in_rx--;
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virtio_net_stats.ets_packetR++;
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}
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/* Packets from the TX queue just indicated they are free to
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/*
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* Packets from the TX queue just indicated they are free to
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* be reused now. inet already knows about them as being sent.
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*/
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while (virtio_from_queue(net_dev, TX_Q, (void **)&p, NULL) == 0) {
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@ -288,173 +282,19 @@ virtio_net_check_queues(void)
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static void
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virtio_net_check_pending(void)
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{
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int dst = 0xDEAD;
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int r;
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message reply;
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reply.m_type = DL_TASK_REPLY;
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reply.m_netdrv_net_dl_task.flags = DL_NOFLAGS;
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reply.m_netdrv_net_dl_task.count = 0;
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/* Pending read and something in recv_list? */
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if (!STAILQ_EMPTY(&recv_list) && rx_pending) {
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dst = pending_rx_msg.m_source;
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reply.m_netdrv_net_dl_task.count =
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virtio_net_cpy_to_user(&pending_rx_msg);
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reply.m_netdrv_net_dl_task.flags |= DL_PACK_RECV;
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rx_pending = 0;
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}
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if (!STAILQ_EMPTY(&recv_list))
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netdriver_recv();
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if (!STAILQ_EMPTY(&free_list) && tx_pending) {
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dst = pending_tx_msg.m_source;
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virtio_net_cpy_from_user(&pending_tx_msg);
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reply.m_netdrv_net_dl_task.flags |= DL_PACK_SEND;
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tx_pending = 0;
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}
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/* Only reply if a pending request was handled */
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if (reply.m_netdrv_net_dl_task.flags != DL_NOFLAGS)
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if ((r = ipc_send(dst, &reply)) != OK)
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panic("%s: ipc_send to %d failed (%d)", name, dst, r);
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if (!STAILQ_EMPTY(&free_list))
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netdriver_send();
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}
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static void
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virtio_net_fetch_iovec(iovec_s_t *iov, message *m, cp_grant_id_t grant, size_t count)
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virtio_net_intr(unsigned int __unused mask)
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{
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int r;
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r = sys_safecopyfrom(m->m_source, grant, 0, (vir_bytes)iov,
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count * sizeof(iov[0]));
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if (r != OK)
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panic("%s: iovec fail for %d (%d)", name, m->m_source, r);
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}
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static int
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virtio_net_cpy_to_user(message *m)
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{
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/* Hmm, this looks so similar to cpy_from_user... TODO */
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int i, r, size, ivsz;
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int left = MAX_PACK_SIZE; /* Try copying the whole packet */
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int bytes = 0;
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iovec_s_t iovec[NR_IOREQS];
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struct packet *p;
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/* This should only be called if recv_list has some entries */
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assert(!STAILQ_EMPTY(&recv_list));
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p = STAILQ_FIRST(&recv_list);
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STAILQ_REMOVE_HEAD(&recv_list, next);
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virtio_net_fetch_iovec(iovec, m, m->m_net_netdrv_dl_readv_s.grant,
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m->m_net_netdrv_dl_readv_s.count);
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for (i = 0; i < m->m_net_netdrv_dl_readv_s.count && left > 0; i++) {
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ivsz = iovec[i].iov_size;
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size = left > ivsz ? ivsz : left;
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r = sys_safecopyto(m->m_source, iovec[i].iov_grant, 0,
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(vir_bytes) p->vdata + bytes, size);
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if (r != OK)
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panic("%s: copy to %d failed (%d)", name,
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m->m_source,
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r);
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left -= size;
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bytes += size;
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}
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if (left != 0)
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dput(("Uhm... left=%d", left));
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/* Clean the packet */
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memset(p->vhdr, 0, sizeof(*p->vhdr));
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memset(p->vdata, 0, MAX_PACK_SIZE);
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STAILQ_INSERT_HEAD(&free_list, p, next);
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return bytes;
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}
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static int
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sys_easy_vsafecopy_from(endpoint_t src_proc, iovec_s_t *iov, int count,
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vir_bytes dst, size_t max, size_t *copied)
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{
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int i, r;
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size_t left = max;
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vir_bytes cur_off = 0;
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struct vscp_vec vv[NR_IOREQS];
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for (i = 0; i < count && left > 0; i++) {
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vv[i].v_from = src_proc;
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vv[i].v_to = SELF;
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vv[i].v_gid = iov[i].iov_grant;
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vv[i].v_offset = 0;
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vv[i].v_addr = dst + cur_off;
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vv[i].v_bytes = iov[i].iov_size;
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/* More data in iov than the buffer can hold, this should be
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* manageable by the caller.
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*/
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if (left - vv[i].v_bytes > left) {
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printf("sys_easy_vsafecopy_from: buf too small!\n");
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return ENOMEM;
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}
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left -= iov[i].iov_size;
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cur_off += iov[i].iov_size;
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}
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/* Now that we prepared the vscp_vec, we can call vsafecopy() */
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if ((r = sys_vsafecopy(vv, count)) != OK)
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printf("sys_vsafecopy: failed: (%d)\n", r);
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if (copied)
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*copied = cur_off;
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return OK;
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}
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static int
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virtio_net_cpy_from_user(message *m)
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{
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/* Put user bytes into a a free packet buffer and
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* then forward this packet to the TX queue.
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*/
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int r;
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iovec_s_t iovec[NR_IOREQS];
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struct vumap_phys phys[2];
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struct packet *p;
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size_t bytes;
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/* This should only be called if free_list has some entries */
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assert(!STAILQ_EMPTY(&free_list));
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p = STAILQ_FIRST(&free_list);
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STAILQ_REMOVE_HEAD(&free_list, next);
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virtio_net_fetch_iovec(iovec, m, m->m_net_netdrv_dl_writev_s.grant,
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m->m_net_netdrv_dl_writev_s.count);
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r = sys_easy_vsafecopy_from(m->m_source, iovec,
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m->m_net_netdrv_dl_writev_s.count, (vir_bytes)p->vdata,
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MAX_PACK_SIZE, &bytes);
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if (r != OK)
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panic("%s: copy from %d failed", name, m->m_source);
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phys[0].vp_addr = p->phdr;
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assert(!(phys[0].vp_addr & 1));
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phys[0].vp_size = sizeof(struct virtio_net_hdr);
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phys[1].vp_addr = p->pdata;
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assert(!(phys[1].vp_addr & 1));
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phys[1].vp_size = bytes;
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virtio_to_queue(net_dev, TX_Q, phys, 2, p);
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return bytes;
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}
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static void
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virtio_net_intr(message *m)
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{
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/* Check and clear interrupt flag */
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if (virtio_had_irq(net_dev)) {
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virtio_net_check_queues();
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@ -468,202 +308,131 @@ virtio_net_intr(message *m)
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virtio_net_check_pending();
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virtio_irq_enable(net_dev);
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/* Readd packets to the receive queue as necessary. */
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virtio_net_refill_rx_queue();
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}
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static void
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virtio_net_write(message *m)
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{
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int r;
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message reply;
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reply.m_type = DL_TASK_REPLY;
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reply.m_netdrv_net_dl_task.flags = DL_NOFLAGS;
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reply.m_netdrv_net_dl_task.count = 0;
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if (!STAILQ_EMPTY(&free_list)) {
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/* free_list contains at least one packet, use it */
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reply.m_netdrv_net_dl_task.count = virtio_net_cpy_from_user(m);
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reply.m_netdrv_net_dl_task.flags = DL_PACK_SEND;
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} else {
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pending_tx_msg = *m;
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tx_pending = 1;
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}
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if ((r = ipc_send(m->m_source, &reply)) != OK)
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panic("%s: ipc_send to %d failed (%d)", name, m->m_source, r);
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}
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static void
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virtio_net_read(message *m)
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{
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int r;
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message reply;
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reply.m_type = DL_TASK_REPLY;
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reply.m_netdrv_net_dl_task.flags = DL_NOFLAGS;
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reply.m_netdrv_net_dl_task.count = 0;
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if (!STAILQ_EMPTY(&recv_list)) {
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/* recv_list contains at least one packet, copy it */
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reply.m_netdrv_net_dl_task.count = virtio_net_cpy_to_user(m);
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reply.m_netdrv_net_dl_task.flags = DL_PACK_RECV;
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} else {
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rx_pending = 1;
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pending_rx_msg = *m;
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}
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if ((r = ipc_send(m->m_source, &reply)) != OK)
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panic("%s: ipc_send to %d failed (%d)", name, m->m_source, r);
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}
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static void
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virtio_net_conf(message *m)
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{
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/* TODO: Add the multicast, broadcast filtering etc. */
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int i, r;
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message reply;
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/* If this is the first CONF message we see, fully initialize
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* the device now.
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*/
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if (!started) {
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started = 1;
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virtio_device_ready(net_dev);
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virtio_irq_enable(net_dev);
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}
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/* Prepare reply */
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memcpy(reply.m_netdrv_net_dl_conf.hw_addr, virtio_net_mac,
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sizeof(reply.m_netdrv_net_dl_conf.hw_addr));
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reply.m_type = DL_CONF_REPLY;
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reply.m_netdrv_net_dl_conf.stat = OK;
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|
||||
if ((r = ipc_send(m->m_source, &reply)) != OK)
|
||||
panic("%s: ipc_send to %d failed (%d)", name, m->m_source, r);
|
||||
}
|
||||
|
||||
static void
|
||||
virtio_net_getstat(message *m)
|
||||
{
|
||||
int r;
|
||||
message reply;
|
||||
|
||||
reply.m_type = DL_STAT_REPLY;
|
||||
|
||||
r = sys_safecopyto(m->m_source, m->m_net_netdrv_dl_getstat_s.grant, 0,
|
||||
(vir_bytes)&virtio_net_stats,
|
||||
sizeof(virtio_net_stats));
|
||||
|
||||
if (r != OK)
|
||||
panic("%s: copy to %d failed (%d)", name, m->m_source, r);
|
||||
|
||||
if ((r = ipc_send(m->m_source, &reply)) != OK)
|
||||
panic("%s: ipc_send to %d failed (%d)", name, m->m_source, r);
|
||||
}
|
||||
|
||||
static void
|
||||
virtio_net_notify(message *m)
|
||||
{
|
||||
if (_ENDPOINT_P(m->m_source) == HARDWARE)
|
||||
virtio_net_intr(m);
|
||||
}
|
||||
|
||||
static void
|
||||
virtio_net_msg(message *m)
|
||||
{
|
||||
switch (m->m_type) {
|
||||
case DL_WRITEV_S:
|
||||
virtio_net_write(m);
|
||||
break;
|
||||
case DL_READV_S:
|
||||
virtio_net_read(m);
|
||||
break;
|
||||
case DL_CONF:
|
||||
virtio_net_conf(m);
|
||||
break;
|
||||
case DL_GETSTAT_S:
|
||||
virtio_net_getstat(m);
|
||||
break;
|
||||
default:
|
||||
panic("%s: illegal message: %d", name, m->m_type);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
virtio_net_main_loop(void)
|
||||
{
|
||||
message m;
|
||||
int ipc_status;
|
||||
int r;
|
||||
|
||||
while (TRUE) {
|
||||
|
||||
virtio_net_refill_rx_queue();
|
||||
|
||||
if ((r = netdriver_receive(ANY, &m, &ipc_status)) != OK)
|
||||
panic("%s: netdriver_receive failed: %d", name, r);
|
||||
|
||||
if (is_ipc_notify(ipc_status))
|
||||
virtio_net_notify(&m);
|
||||
else
|
||||
virtio_net_msg(&m);
|
||||
}
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, char *argv[])
|
||||
{
|
||||
env_setargs(argc, argv);
|
||||
sef_local_startup();
|
||||
|
||||
virtio_net_main_loop();
|
||||
}
|
||||
|
||||
static void
|
||||
sef_local_startup()
|
||||
{
|
||||
sef_setcb_init_fresh(sef_cb_init_fresh);
|
||||
sef_setcb_init_lu(sef_cb_init_fresh);
|
||||
sef_setcb_init_restart(sef_cb_init_fresh);
|
||||
|
||||
sef_setcb_lu_prepare(sef_cb_lu_prepare_always_ready);
|
||||
sef_setcb_lu_state_isvalid(sef_cb_lu_state_isvalid_workfree);
|
||||
|
||||
sef_setcb_signal_handler(sef_cb_signal_handler);
|
||||
|
||||
sef_startup();
|
||||
}
|
||||
|
||||
/*
|
||||
* Put user bytes into a free packet buffer, forward this packet to the TX
|
||||
* queue, and return OK. If there are no free packet buffers, return SUSPEND.
|
||||
*/
|
||||
static int
|
||||
sef_cb_init_fresh(int type, sef_init_info_t *info)
|
||||
virtio_net_send(struct netdriver_data * data, size_t len)
|
||||
{
|
||||
long instance = 0;
|
||||
env_parse("instance", "d", 0, &instance, 0, 255);
|
||||
struct vumap_phys phys[2];
|
||||
struct packet *p;
|
||||
|
||||
if (virtio_net_probe((int)instance) != OK)
|
||||
panic("%s: No device found", name);
|
||||
if (STAILQ_EMPTY(&free_list))
|
||||
return SUSPEND;
|
||||
|
||||
if (virtio_net_config() != OK)
|
||||
panic("%s: No device found", name);
|
||||
p = STAILQ_FIRST(&free_list);
|
||||
STAILQ_REMOVE_HEAD(&free_list, next);
|
||||
|
||||
if (len > MAX_PACK_SIZE)
|
||||
panic("%s: packet too large to send: %zu", name, len);
|
||||
|
||||
netdriver_copyin(data, 0, p->vdata, len);
|
||||
|
||||
phys[0].vp_addr = p->phdr;
|
||||
assert(!(phys[0].vp_addr & 1));
|
||||
phys[0].vp_size = sizeof(struct virtio_net_hdr);
|
||||
phys[1].vp_addr = p->pdata;
|
||||
assert(!(phys[1].vp_addr & 1));
|
||||
phys[1].vp_size = len;
|
||||
virtio_to_queue(net_dev, TX_Q, phys, 2, p);
|
||||
|
||||
return OK;
|
||||
}
|
||||
|
||||
/*
|
||||
* Put a packet receive from the RX queue into a user buffer, and return the
|
||||
* packet length. If there are no received packets, return SUSPEND.
|
||||
*/
|
||||
static ssize_t
|
||||
virtio_net_recv(struct netdriver_data * data, size_t max)
|
||||
{
|
||||
struct packet *p;
|
||||
ssize_t len;
|
||||
|
||||
/* Get the first received packet, if any. */
|
||||
if (STAILQ_EMPTY(&recv_list))
|
||||
return SUSPEND;
|
||||
|
||||
p = STAILQ_FIRST(&recv_list);
|
||||
STAILQ_REMOVE_HEAD(&recv_list, next);
|
||||
|
||||
/* Copy out the packet contents. */
|
||||
len = p->len - sizeof(struct virtio_net_hdr);
|
||||
if (len > max)
|
||||
len = max;
|
||||
|
||||
/*
|
||||
* HACK: due to lack of padding, received packets may in fact be
|
||||
* smaller than the minimum ethernet packet size. Inet will accept the
|
||||
* packets just fine if we increase the length to its minimum. We
|
||||
* already zeroed out the rest of the packet data, so this is safe.
|
||||
*/
|
||||
if (len < ETH_MIN_PACK_SIZE)
|
||||
len = ETH_MIN_PACK_SIZE;
|
||||
|
||||
netdriver_copyout(data, 0, p->vdata, len);
|
||||
|
||||
/* Clean the packet. */
|
||||
memset(p->vhdr, 0, sizeof(*p->vhdr));
|
||||
memset(p->vdata, 0, MAX_PACK_SIZE);
|
||||
STAILQ_INSERT_HEAD(&free_list, p, next);
|
||||
|
||||
/* Readd packets to the receive queue as necessary. */
|
||||
virtio_net_refill_rx_queue();
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
/*
|
||||
* Return statistics.
|
||||
*/
|
||||
static void
|
||||
virtio_net_stat(eth_stat_t *stat)
|
||||
{
|
||||
|
||||
memcpy(stat, &virtio_net_stats, sizeof(*stat));
|
||||
}
|
||||
|
||||
/*
|
||||
* Initialize the driver and the virtual hardware.
|
||||
*/
|
||||
static int
|
||||
virtio_net_init(unsigned int instance, ether_addr_t *addr)
|
||||
{
|
||||
int r;
|
||||
|
||||
if ((r = virtio_net_probe(instance)) != OK)
|
||||
return r;
|
||||
|
||||
virtio_net_config(addr);
|
||||
|
||||
if (virtio_net_alloc_bufs() != OK)
|
||||
panic("%s: Buffer allocation failed", name);
|
||||
|
||||
virtio_net_init_queues();
|
||||
|
||||
netdriver_announce();
|
||||
/* Add packets to the receive queue. */
|
||||
virtio_net_refill_rx_queue();
|
||||
|
||||
virtio_device_ready(net_dev);
|
||||
|
||||
virtio_irq_enable(net_dev);
|
||||
|
||||
return(OK);
|
||||
}
|
||||
|
||||
/*
|
||||
* The driver is terminating. Clean up.
|
||||
*/
|
||||
static void
|
||||
sef_cb_signal_handler(int signo)
|
||||
virtio_net_stop(void)
|
||||
{
|
||||
if (signo != SIGTERM)
|
||||
return;
|
||||
|
||||
dput(("Terminating"));
|
||||
|
||||
|
|
@ -675,6 +444,18 @@ sef_cb_signal_handler(int signo)
|
|||
virtio_free_queues(net_dev);
|
||||
virtio_free_device(net_dev);
|
||||
net_dev = NULL;
|
||||
|
||||
exit(1);
|
||||
}
|
||||
|
||||
/*
|
||||
* The virtio-net device driver.
|
||||
*/
|
||||
int
|
||||
main(int argc, char *argv[])
|
||||
{
|
||||
|
||||
env_setargs(argc, argv);
|
||||
|
||||
netdriver_task(&virtio_net_table);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue