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authorRajithaY <rajithax.yerrumsetty@intel.com>2017-04-25 03:31:15 -0700
committerRajitha Yerrumchetty <rajithax.yerrumsetty@intel.com>2017-05-22 06:48:08 +0000
commitbb756eebdac6fd24e8919e2c43f7d2c8c4091f59 (patch)
treeca11e03542edf2d8f631efeca5e1626d211107e3 /qemu/hw/net/xen_nic.c
parenta14b48d18a9ed03ec191cf16b162206998a895ce (diff)
Adding qemu as a submodule of KVMFORNFV
This Patch includes the changes to add qemu as a submodule to kvmfornfv repo and make use of the updated latest qemu for the execution of all testcase Change-Id: I1280af507a857675c7f81d30c95255635667bdd7 Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>
Diffstat (limited to 'qemu/hw/net/xen_nic.c')
-rw-r--r--qemu/hw/net/xen_nic.c412
1 files changed, 0 insertions, 412 deletions
diff --git a/qemu/hw/net/xen_nic.c b/qemu/hw/net/xen_nic.c
deleted file mode 100644
index 7281730d9..000000000
--- a/qemu/hw/net/xen_nic.c
+++ /dev/null
@@ -1,412 +0,0 @@
-/*
- * xen paravirt network card backend
- *
- * (c) Gerd Hoffmann <kraxel@redhat.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; under version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, see <http://www.gnu.org/licenses/>.
- *
- * Contributions after 2012-01-13 are licensed under the terms of the
- * GNU GPL, version 2 or (at your option) any later version.
- */
-
-#include "qemu/osdep.h"
-#include <sys/socket.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sys/wait.h>
-
-#include "hw/hw.h"
-#include "net/net.h"
-#include "net/checksum.h"
-#include "net/util.h"
-#include "hw/xen/xen_backend.h"
-
-#include <xen/io/netif.h>
-
-/* ------------------------------------------------------------- */
-
-struct XenNetDev {
- struct XenDevice xendev; /* must be first */
- char *mac;
- int tx_work;
- int tx_ring_ref;
- int rx_ring_ref;
- struct netif_tx_sring *txs;
- struct netif_rx_sring *rxs;
- netif_tx_back_ring_t tx_ring;
- netif_rx_back_ring_t rx_ring;
- NICConf conf;
- NICState *nic;
-};
-
-/* ------------------------------------------------------------- */
-
-static void net_tx_response(struct XenNetDev *netdev, netif_tx_request_t *txp, int8_t st)
-{
- RING_IDX i = netdev->tx_ring.rsp_prod_pvt;
- netif_tx_response_t *resp;
- int notify;
-
- resp = RING_GET_RESPONSE(&netdev->tx_ring, i);
- resp->id = txp->id;
- resp->status = st;
-
-#if 0
- if (txp->flags & NETTXF_extra_info) {
- RING_GET_RESPONSE(&netdev->tx_ring, ++i)->status = NETIF_RSP_NULL;
- }
-#endif
-
- netdev->tx_ring.rsp_prod_pvt = ++i;
- RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&netdev->tx_ring, notify);
- if (notify) {
- xen_be_send_notify(&netdev->xendev);
- }
-
- if (i == netdev->tx_ring.req_cons) {
- int more_to_do;
- RING_FINAL_CHECK_FOR_REQUESTS(&netdev->tx_ring, more_to_do);
- if (more_to_do) {
- netdev->tx_work++;
- }
- }
-}
-
-static void net_tx_error(struct XenNetDev *netdev, netif_tx_request_t *txp, RING_IDX end)
-{
-#if 0
- /*
- * Hmm, why netback fails everything in the ring?
- * Should we do that even when not supporting SG and TSO?
- */
- RING_IDX cons = netdev->tx_ring.req_cons;
-
- do {
- make_tx_response(netif, txp, NETIF_RSP_ERROR);
- if (cons >= end) {
- break;
- }
- txp = RING_GET_REQUEST(&netdev->tx_ring, cons++);
- } while (1);
- netdev->tx_ring.req_cons = cons;
- netif_schedule_work(netif);
- netif_put(netif);
-#else
- net_tx_response(netdev, txp, NETIF_RSP_ERROR);
-#endif
-}
-
-static void net_tx_packets(struct XenNetDev *netdev)
-{
- netif_tx_request_t txreq;
- RING_IDX rc, rp;
- void *page;
- void *tmpbuf = NULL;
-
- for (;;) {
- rc = netdev->tx_ring.req_cons;
- rp = netdev->tx_ring.sring->req_prod;
- xen_rmb(); /* Ensure we see queued requests up to 'rp'. */
-
- while ((rc != rp)) {
- if (RING_REQUEST_CONS_OVERFLOW(&netdev->tx_ring, rc)) {
- break;
- }
- memcpy(&txreq, RING_GET_REQUEST(&netdev->tx_ring, rc), sizeof(txreq));
- netdev->tx_ring.req_cons = ++rc;
-
-#if 1
- /* should not happen in theory, we don't announce the *
- * feature-{sg,gso,whatelse} flags in xenstore (yet?) */
- if (txreq.flags & NETTXF_extra_info) {
- xen_be_printf(&netdev->xendev, 0, "FIXME: extra info flag\n");
- net_tx_error(netdev, &txreq, rc);
- continue;
- }
- if (txreq.flags & NETTXF_more_data) {
- xen_be_printf(&netdev->xendev, 0, "FIXME: more data flag\n");
- net_tx_error(netdev, &txreq, rc);
- continue;
- }
-#endif
-
- if (txreq.size < 14) {
- xen_be_printf(&netdev->xendev, 0, "bad packet size: %d\n", txreq.size);
- net_tx_error(netdev, &txreq, rc);
- continue;
- }
-
- if ((txreq.offset + txreq.size) > XC_PAGE_SIZE) {
- xen_be_printf(&netdev->xendev, 0, "error: page crossing\n");
- net_tx_error(netdev, &txreq, rc);
- continue;
- }
-
- xen_be_printf(&netdev->xendev, 3, "tx packet ref %d, off %d, len %d, flags 0x%x%s%s%s%s\n",
- txreq.gref, txreq.offset, txreq.size, txreq.flags,
- (txreq.flags & NETTXF_csum_blank) ? " csum_blank" : "",
- (txreq.flags & NETTXF_data_validated) ? " data_validated" : "",
- (txreq.flags & NETTXF_more_data) ? " more_data" : "",
- (txreq.flags & NETTXF_extra_info) ? " extra_info" : "");
-
- page = xengnttab_map_grant_ref(netdev->xendev.gnttabdev,
- netdev->xendev.dom,
- txreq.gref, PROT_READ);
- if (page == NULL) {
- xen_be_printf(&netdev->xendev, 0, "error: tx gref dereference failed (%d)\n",
- txreq.gref);
- net_tx_error(netdev, &txreq, rc);
- continue;
- }
- if (txreq.flags & NETTXF_csum_blank) {
- /* have read-only mapping -> can't fill checksum in-place */
- if (!tmpbuf) {
- tmpbuf = g_malloc(XC_PAGE_SIZE);
- }
- memcpy(tmpbuf, page + txreq.offset, txreq.size);
- net_checksum_calculate(tmpbuf, txreq.size);
- qemu_send_packet(qemu_get_queue(netdev->nic), tmpbuf,
- txreq.size);
- } else {
- qemu_send_packet(qemu_get_queue(netdev->nic),
- page + txreq.offset, txreq.size);
- }
- xengnttab_unmap(netdev->xendev.gnttabdev, page, 1);
- net_tx_response(netdev, &txreq, NETIF_RSP_OKAY);
- }
- if (!netdev->tx_work) {
- break;
- }
- netdev->tx_work = 0;
- }
- g_free(tmpbuf);
-}
-
-/* ------------------------------------------------------------- */
-
-static void net_rx_response(struct XenNetDev *netdev,
- netif_rx_request_t *req, int8_t st,
- uint16_t offset, uint16_t size,
- uint16_t flags)
-{
- RING_IDX i = netdev->rx_ring.rsp_prod_pvt;
- netif_rx_response_t *resp;
- int notify;
-
- resp = RING_GET_RESPONSE(&netdev->rx_ring, i);
- resp->offset = offset;
- resp->flags = flags;
- resp->id = req->id;
- resp->status = (int16_t)size;
- if (st < 0) {
- resp->status = (int16_t)st;
- }
-
- xen_be_printf(&netdev->xendev, 3, "rx response: idx %d, status %d, flags 0x%x\n",
- i, resp->status, resp->flags);
-
- netdev->rx_ring.rsp_prod_pvt = ++i;
- RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&netdev->rx_ring, notify);
- if (notify) {
- xen_be_send_notify(&netdev->xendev);
- }
-}
-
-#define NET_IP_ALIGN 2
-
-static ssize_t net_rx_packet(NetClientState *nc, const uint8_t *buf, size_t size)
-{
- struct XenNetDev *netdev = qemu_get_nic_opaque(nc);
- netif_rx_request_t rxreq;
- RING_IDX rc, rp;
- void *page;
-
- if (netdev->xendev.be_state != XenbusStateConnected) {
- return -1;
- }
-
- rc = netdev->rx_ring.req_cons;
- rp = netdev->rx_ring.sring->req_prod;
- xen_rmb(); /* Ensure we see queued requests up to 'rp'. */
-
- if (rc == rp || RING_REQUEST_CONS_OVERFLOW(&netdev->rx_ring, rc)) {
- return 0;
- }
- if (size > XC_PAGE_SIZE - NET_IP_ALIGN) {
- xen_be_printf(&netdev->xendev, 0, "packet too big (%lu > %ld)",
- (unsigned long)size, XC_PAGE_SIZE - NET_IP_ALIGN);
- return -1;
- }
-
- memcpy(&rxreq, RING_GET_REQUEST(&netdev->rx_ring, rc), sizeof(rxreq));
- netdev->rx_ring.req_cons = ++rc;
-
- page = xengnttab_map_grant_ref(netdev->xendev.gnttabdev,
- netdev->xendev.dom,
- rxreq.gref, PROT_WRITE);
- if (page == NULL) {
- xen_be_printf(&netdev->xendev, 0, "error: rx gref dereference failed (%d)\n",
- rxreq.gref);
- net_rx_response(netdev, &rxreq, NETIF_RSP_ERROR, 0, 0, 0);
- return -1;
- }
- memcpy(page + NET_IP_ALIGN, buf, size);
- xengnttab_unmap(netdev->xendev.gnttabdev, page, 1);
- net_rx_response(netdev, &rxreq, NETIF_RSP_OKAY, NET_IP_ALIGN, size, 0);
-
- return size;
-}
-
-/* ------------------------------------------------------------- */
-
-static NetClientInfo net_xen_info = {
- .type = NET_CLIENT_OPTIONS_KIND_NIC,
- .size = sizeof(NICState),
- .receive = net_rx_packet,
-};
-
-static int net_init(struct XenDevice *xendev)
-{
- struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev);
-
- /* read xenstore entries */
- if (netdev->mac == NULL) {
- netdev->mac = xenstore_read_be_str(&netdev->xendev, "mac");
- }
-
- /* do we have all we need? */
- if (netdev->mac == NULL) {
- return -1;
- }
-
- if (net_parse_macaddr(netdev->conf.macaddr.a, netdev->mac) < 0) {
- return -1;
- }
-
- netdev->nic = qemu_new_nic(&net_xen_info, &netdev->conf,
- "xen", NULL, netdev);
-
- snprintf(qemu_get_queue(netdev->nic)->info_str,
- sizeof(qemu_get_queue(netdev->nic)->info_str),
- "nic: xenbus vif macaddr=%s", netdev->mac);
-
- /* fill info */
- xenstore_write_be_int(&netdev->xendev, "feature-rx-copy", 1);
- xenstore_write_be_int(&netdev->xendev, "feature-rx-flip", 0);
-
- return 0;
-}
-
-static int net_connect(struct XenDevice *xendev)
-{
- struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev);
- int rx_copy;
-
- if (xenstore_read_fe_int(&netdev->xendev, "tx-ring-ref",
- &netdev->tx_ring_ref) == -1) {
- return -1;
- }
- if (xenstore_read_fe_int(&netdev->xendev, "rx-ring-ref",
- &netdev->rx_ring_ref) == -1) {
- return 1;
- }
- if (xenstore_read_fe_int(&netdev->xendev, "event-channel",
- &netdev->xendev.remote_port) == -1) {
- return -1;
- }
-
- if (xenstore_read_fe_int(&netdev->xendev, "request-rx-copy", &rx_copy) == -1) {
- rx_copy = 0;
- }
- if (rx_copy == 0) {
- xen_be_printf(&netdev->xendev, 0, "frontend doesn't support rx-copy.\n");
- return -1;
- }
-
- netdev->txs = xengnttab_map_grant_ref(netdev->xendev.gnttabdev,
- netdev->xendev.dom,
- netdev->tx_ring_ref,
- PROT_READ | PROT_WRITE);
- if (!netdev->txs) {
- return -1;
- }
- netdev->rxs = xengnttab_map_grant_ref(netdev->xendev.gnttabdev,
- netdev->xendev.dom,
- netdev->rx_ring_ref,
- PROT_READ | PROT_WRITE);
- if (!netdev->rxs) {
- xengnttab_unmap(netdev->xendev.gnttabdev, netdev->txs, 1);
- netdev->txs = NULL;
- return -1;
- }
- BACK_RING_INIT(&netdev->tx_ring, netdev->txs, XC_PAGE_SIZE);
- BACK_RING_INIT(&netdev->rx_ring, netdev->rxs, XC_PAGE_SIZE);
-
- xen_be_bind_evtchn(&netdev->xendev);
-
- xen_be_printf(&netdev->xendev, 1, "ok: tx-ring-ref %d, rx-ring-ref %d, "
- "remote port %d, local port %d\n",
- netdev->tx_ring_ref, netdev->rx_ring_ref,
- netdev->xendev.remote_port, netdev->xendev.local_port);
-
- net_tx_packets(netdev);
- return 0;
-}
-
-static void net_disconnect(struct XenDevice *xendev)
-{
- struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev);
-
- xen_be_unbind_evtchn(&netdev->xendev);
-
- if (netdev->txs) {
- xengnttab_unmap(netdev->xendev.gnttabdev, netdev->txs, 1);
- netdev->txs = NULL;
- }
- if (netdev->rxs) {
- xengnttab_unmap(netdev->xendev.gnttabdev, netdev->rxs, 1);
- netdev->rxs = NULL;
- }
-}
-
-static void net_event(struct XenDevice *xendev)
-{
- struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev);
- net_tx_packets(netdev);
- qemu_flush_queued_packets(qemu_get_queue(netdev->nic));
-}
-
-static int net_free(struct XenDevice *xendev)
-{
- struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev);
-
- if (netdev->nic) {
- qemu_del_nic(netdev->nic);
- netdev->nic = NULL;
- }
- g_free(netdev->mac);
- netdev->mac = NULL;
- return 0;
-}
-
-/* ------------------------------------------------------------- */
-
-struct XenDevOps xen_netdev_ops = {
- .size = sizeof(struct XenNetDev),
- .flags = DEVOPS_FLAG_NEED_GNTDEV,
- .init = net_init,
- .initialise = net_connect,
- .event = net_event,
- .disconnect = net_disconnect,
- .free = net_free,
-};