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@@ -17,8 +17,6 @@
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#include <linux/mutex.h>
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#include <linux/highmem.h>
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#include <linux/if_vlan.h>
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-#define CREATE_TRACE_POINTS
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-#include <trace/events/sunvnet.h>
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#if IS_ENABLED(CONFIG_IPV6)
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#include <linux/icmpv6.h>
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@@ -31,7 +29,12 @@
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#include <asm/vio.h>
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#include <asm/ldc.h>
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-#include "sunvnet.h"
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+#include "sunvnet_common.h"
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+
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+/* length of time before we decide the hardware is borked,
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+ * and dev->tx_timeout() should be called to fix the problem
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+ */
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+#define VNET_TX_TIMEOUT (5 * HZ)
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#define DRV_MODULE_NAME "sunvnet"
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#define DRV_MODULE_VERSION "1.0"
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@@ -44,16 +47,6 @@ MODULE_DESCRIPTION("Sun LDOM virtual network driver");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_MODULE_VERSION);
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-#define VNET_MAX_TXQS 16
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-
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-/* Heuristic for the number of times to exponentially backoff and
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- * retry sending an LDC trigger when EAGAIN is encountered
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- */
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-#define VNET_MAX_RETRIES 10
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-
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-static int __vnet_tx_trigger(struct vnet_port *port, u32 start);
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-static void vnet_port_reset(struct vnet_port *port);
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-
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/* Ordered from largest major to lowest */
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static struct vio_version vnet_versions[] = {
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{ .major = 1, .minor = 8 },
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@@ -62,1578 +55,6 @@ static struct vio_version vnet_versions[] = {
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{ .major = 1, .minor = 0 },
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};
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-static inline u32 vnet_tx_dring_avail(struct vio_dring_state *dr)
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-{
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- return vio_dring_avail(dr, VNET_TX_RING_SIZE);
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-}
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-
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-static int vnet_handle_unknown(struct vnet_port *port, void *arg)
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-{
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- struct vio_msg_tag *pkt = arg;
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-
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- pr_err("Received unknown msg [%02x:%02x:%04x:%08x]\n",
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- pkt->type, pkt->stype, pkt->stype_env, pkt->sid);
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- pr_err("Resetting connection\n");
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-
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- ldc_disconnect(port->vio.lp);
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-
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- return -ECONNRESET;
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-}
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-
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-static int vnet_port_alloc_tx_ring(struct vnet_port *port);
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-
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-static int vnet_send_attr(struct vio_driver_state *vio)
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-{
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- struct vnet_port *port = to_vnet_port(vio);
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- struct net_device *dev = port->vp->dev;
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- struct vio_net_attr_info pkt;
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- int framelen = ETH_FRAME_LEN;
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- int i, err;
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-
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- err = vnet_port_alloc_tx_ring(to_vnet_port(vio));
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- if (err)
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- return err;
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-
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- memset(&pkt, 0, sizeof(pkt));
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- pkt.tag.type = VIO_TYPE_CTRL;
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- pkt.tag.stype = VIO_SUBTYPE_INFO;
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- pkt.tag.stype_env = VIO_ATTR_INFO;
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- pkt.tag.sid = vio_send_sid(vio);
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- if (vio_version_before(vio, 1, 2))
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- pkt.xfer_mode = VIO_DRING_MODE;
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- else
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- pkt.xfer_mode = VIO_NEW_DRING_MODE;
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- pkt.addr_type = VNET_ADDR_ETHERMAC;
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- pkt.ack_freq = 0;
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- for (i = 0; i < 6; i++)
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- pkt.addr |= (u64)dev->dev_addr[i] << ((5 - i) * 8);
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- if (vio_version_after(vio, 1, 3)) {
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- if (port->rmtu) {
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- port->rmtu = min(VNET_MAXPACKET, port->rmtu);
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- pkt.mtu = port->rmtu;
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- } else {
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- port->rmtu = VNET_MAXPACKET;
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- pkt.mtu = port->rmtu;
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- }
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- if (vio_version_after_eq(vio, 1, 6))
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- pkt.options = VIO_TX_DRING;
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- } else if (vio_version_before(vio, 1, 3)) {
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- pkt.mtu = framelen;
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- } else { /* v1.3 */
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- pkt.mtu = framelen + VLAN_HLEN;
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- }
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-
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- pkt.cflags = 0;
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- if (vio_version_after_eq(vio, 1, 7) && port->tso) {
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- pkt.cflags |= VNET_LSO_IPV4_CAPAB;
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- if (!port->tsolen)
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- port->tsolen = VNET_MAXTSO;
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- pkt.ipv4_lso_maxlen = port->tsolen;
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- }
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-
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- pkt.plnk_updt = PHYSLINK_UPDATE_NONE;
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-
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- viodbg(HS, "SEND NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] "
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- "ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] mtu[%llu] "
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- "cflags[0x%04x] lso_max[%u]\n",
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- pkt.xfer_mode, pkt.addr_type,
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- (unsigned long long)pkt.addr,
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- pkt.ack_freq, pkt.plnk_updt, pkt.options,
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- (unsigned long long)pkt.mtu, pkt.cflags, pkt.ipv4_lso_maxlen);
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-
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-
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- return vio_ldc_send(vio, &pkt, sizeof(pkt));
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-}
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-
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-static int handle_attr_info(struct vio_driver_state *vio,
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- struct vio_net_attr_info *pkt)
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-{
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- struct vnet_port *port = to_vnet_port(vio);
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- u64 localmtu;
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- u8 xfer_mode;
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-
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- viodbg(HS, "GOT NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] "
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- "ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] mtu[%llu] "
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- " (rmtu[%llu]) cflags[0x%04x] lso_max[%u]\n",
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- pkt->xfer_mode, pkt->addr_type,
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- (unsigned long long)pkt->addr,
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- pkt->ack_freq, pkt->plnk_updt, pkt->options,
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- (unsigned long long)pkt->mtu, port->rmtu, pkt->cflags,
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- pkt->ipv4_lso_maxlen);
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-
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- pkt->tag.sid = vio_send_sid(vio);
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-
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- xfer_mode = pkt->xfer_mode;
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- /* for version < 1.2, VIO_DRING_MODE = 0x3 and no bitmask */
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- if (vio_version_before(vio, 1, 2) && xfer_mode == VIO_DRING_MODE)
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- xfer_mode = VIO_NEW_DRING_MODE;
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-
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- /* MTU negotiation:
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- * < v1.3 - ETH_FRAME_LEN exactly
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- * > v1.3 - MIN(pkt.mtu, VNET_MAXPACKET, port->rmtu) and change
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- * pkt->mtu for ACK
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- * = v1.3 - ETH_FRAME_LEN + VLAN_HLEN exactly
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- */
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- if (vio_version_before(vio, 1, 3)) {
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- localmtu = ETH_FRAME_LEN;
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- } else if (vio_version_after(vio, 1, 3)) {
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- localmtu = port->rmtu ? port->rmtu : VNET_MAXPACKET;
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- localmtu = min(pkt->mtu, localmtu);
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- pkt->mtu = localmtu;
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- } else { /* v1.3 */
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- localmtu = ETH_FRAME_LEN + VLAN_HLEN;
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- }
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- port->rmtu = localmtu;
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-
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- /* LSO negotiation */
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- if (vio_version_after_eq(vio, 1, 7))
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- port->tso &= !!(pkt->cflags & VNET_LSO_IPV4_CAPAB);
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- else
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- port->tso = false;
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- if (port->tso) {
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- if (!port->tsolen)
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- port->tsolen = VNET_MAXTSO;
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- port->tsolen = min(port->tsolen, pkt->ipv4_lso_maxlen);
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- if (port->tsolen < VNET_MINTSO) {
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- port->tso = false;
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- port->tsolen = 0;
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- pkt->cflags &= ~VNET_LSO_IPV4_CAPAB;
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- }
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- pkt->ipv4_lso_maxlen = port->tsolen;
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- } else {
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- pkt->cflags &= ~VNET_LSO_IPV4_CAPAB;
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- pkt->ipv4_lso_maxlen = 0;
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- }
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-
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- /* for version >= 1.6, ACK packet mode we support */
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- if (vio_version_after_eq(vio, 1, 6)) {
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- pkt->xfer_mode = VIO_NEW_DRING_MODE;
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- pkt->options = VIO_TX_DRING;
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- }
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-
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- if (!(xfer_mode | VIO_NEW_DRING_MODE) ||
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- pkt->addr_type != VNET_ADDR_ETHERMAC ||
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- pkt->mtu != localmtu) {
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- viodbg(HS, "SEND NET ATTR NACK\n");
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-
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- pkt->tag.stype = VIO_SUBTYPE_NACK;
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-
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- (void) vio_ldc_send(vio, pkt, sizeof(*pkt));
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-
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- return -ECONNRESET;
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- } else {
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- viodbg(HS, "SEND NET ATTR ACK xmode[0x%x] atype[0x%x] "
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- "addr[%llx] ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] "
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- "mtu[%llu] (rmtu[%llu]) cflags[0x%04x] lso_max[%u]\n",
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- pkt->xfer_mode, pkt->addr_type,
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- (unsigned long long)pkt->addr,
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- pkt->ack_freq, pkt->plnk_updt, pkt->options,
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- (unsigned long long)pkt->mtu, port->rmtu, pkt->cflags,
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- pkt->ipv4_lso_maxlen);
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-
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- pkt->tag.stype = VIO_SUBTYPE_ACK;
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-
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- return vio_ldc_send(vio, pkt, sizeof(*pkt));
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- }
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-
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-}
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-
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-static int handle_attr_ack(struct vio_driver_state *vio,
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- struct vio_net_attr_info *pkt)
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-{
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- viodbg(HS, "GOT NET ATTR ACK\n");
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-
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- return 0;
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-}
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-
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-static int handle_attr_nack(struct vio_driver_state *vio,
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- struct vio_net_attr_info *pkt)
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-{
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- viodbg(HS, "GOT NET ATTR NACK\n");
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-
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- return -ECONNRESET;
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-}
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-
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-static int vnet_handle_attr(struct vio_driver_state *vio, void *arg)
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-{
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- struct vio_net_attr_info *pkt = arg;
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-
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- switch (pkt->tag.stype) {
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- case VIO_SUBTYPE_INFO:
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- return handle_attr_info(vio, pkt);
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-
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- case VIO_SUBTYPE_ACK:
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- return handle_attr_ack(vio, pkt);
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-
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- case VIO_SUBTYPE_NACK:
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- return handle_attr_nack(vio, pkt);
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-
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- default:
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- return -ECONNRESET;
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- }
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-}
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-
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-static void vnet_handshake_complete(struct vio_driver_state *vio)
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-{
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- struct vio_dring_state *dr;
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-
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- dr = &vio->drings[VIO_DRIVER_RX_RING];
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- dr->snd_nxt = dr->rcv_nxt = 1;
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-
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- dr = &vio->drings[VIO_DRIVER_TX_RING];
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- dr->snd_nxt = dr->rcv_nxt = 1;
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-}
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-
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-/* The hypervisor interface that implements copying to/from imported
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- * memory from another domain requires that copies are done to 8-byte
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- * aligned buffers, and that the lengths of such copies are also 8-byte
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- * multiples.
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- *
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- * So we align skb->data to an 8-byte multiple and pad-out the data
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- * area so we can round the copy length up to the next multiple of
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- * 8 for the copy.
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- *
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- * The transmitter puts the actual start of the packet 6 bytes into
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- * the buffer it sends over, so that the IP headers after the ethernet
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- * header are aligned properly. These 6 bytes are not in the descriptor
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- * length, they are simply implied. This offset is represented using
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- * the VNET_PACKET_SKIP macro.
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- */
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-static struct sk_buff *alloc_and_align_skb(struct net_device *dev,
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- unsigned int len)
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-{
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- struct sk_buff *skb = netdev_alloc_skb(dev, len+VNET_PACKET_SKIP+8+8);
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- unsigned long addr, off;
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-
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- if (unlikely(!skb))
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- return NULL;
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-
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- addr = (unsigned long) skb->data;
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- off = ((addr + 7UL) & ~7UL) - addr;
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- if (off)
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- skb_reserve(skb, off);
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-
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- return skb;
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-}
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-
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-static inline void vnet_fullcsum(struct sk_buff *skb)
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-{
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- struct iphdr *iph = ip_hdr(skb);
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- int offset = skb_transport_offset(skb);
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-
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- if (skb->protocol != htons(ETH_P_IP))
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- return;
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- if (iph->protocol != IPPROTO_TCP &&
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- iph->protocol != IPPROTO_UDP)
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- return;
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- skb->ip_summed = CHECKSUM_NONE;
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- skb->csum_level = 1;
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- skb->csum = 0;
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- if (iph->protocol == IPPROTO_TCP) {
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- struct tcphdr *ptcp = tcp_hdr(skb);
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-
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- ptcp->check = 0;
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- skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
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- ptcp->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
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- skb->len - offset, IPPROTO_TCP,
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- skb->csum);
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- } else if (iph->protocol == IPPROTO_UDP) {
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- struct udphdr *pudp = udp_hdr(skb);
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-
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- pudp->check = 0;
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- skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
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- pudp->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
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- skb->len - offset, IPPROTO_UDP,
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- skb->csum);
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- }
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-}
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-
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-static int vnet_rx_one(struct vnet_port *port, struct vio_net_desc *desc)
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-{
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- struct net_device *dev = port->vp->dev;
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- unsigned int len = desc->size;
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- unsigned int copy_len;
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- struct sk_buff *skb;
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- int maxlen;
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- int err;
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-
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- err = -EMSGSIZE;
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- if (port->tso && port->tsolen > port->rmtu)
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- maxlen = port->tsolen;
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- else
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- maxlen = port->rmtu;
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- if (unlikely(len < ETH_ZLEN || len > maxlen)) {
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- dev->stats.rx_length_errors++;
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- goto out_dropped;
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- }
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-
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- skb = alloc_and_align_skb(dev, len);
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- err = -ENOMEM;
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- if (unlikely(!skb)) {
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- dev->stats.rx_missed_errors++;
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- goto out_dropped;
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- }
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-
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- copy_len = (len + VNET_PACKET_SKIP + 7U) & ~7U;
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- skb_put(skb, copy_len);
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- err = ldc_copy(port->vio.lp, LDC_COPY_IN,
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- skb->data, copy_len, 0,
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- desc->cookies, desc->ncookies);
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- if (unlikely(err < 0)) {
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- dev->stats.rx_frame_errors++;
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- goto out_free_skb;
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- }
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-
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- skb_pull(skb, VNET_PACKET_SKIP);
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- skb_trim(skb, len);
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- skb->protocol = eth_type_trans(skb, dev);
|
|
|
-
|
|
|
- if (vio_version_after_eq(&port->vio, 1, 8)) {
|
|
|
- struct vio_net_dext *dext = vio_net_ext(desc);
|
|
|
-
|
|
|
- skb_reset_network_header(skb);
|
|
|
-
|
|
|
- if (dext->flags & VNET_PKT_HCK_IPV4_HDRCKSUM) {
|
|
|
- if (skb->protocol == ETH_P_IP) {
|
|
|
- struct iphdr *iph = ip_hdr(skb);
|
|
|
-
|
|
|
- iph->check = 0;
|
|
|
- ip_send_check(iph);
|
|
|
- }
|
|
|
- }
|
|
|
- if ((dext->flags & VNET_PKT_HCK_FULLCKSUM) &&
|
|
|
- skb->ip_summed == CHECKSUM_NONE) {
|
|
|
- if (skb->protocol == htons(ETH_P_IP)) {
|
|
|
- struct iphdr *iph = ip_hdr(skb);
|
|
|
- int ihl = iph->ihl * 4;
|
|
|
-
|
|
|
- skb_reset_transport_header(skb);
|
|
|
- skb_set_transport_header(skb, ihl);
|
|
|
- vnet_fullcsum(skb);
|
|
|
- }
|
|
|
- }
|
|
|
- if (dext->flags & VNET_PKT_HCK_IPV4_HDRCKSUM_OK) {
|
|
|
- skb->ip_summed = CHECKSUM_PARTIAL;
|
|
|
- skb->csum_level = 0;
|
|
|
- if (dext->flags & VNET_PKT_HCK_FULLCKSUM_OK)
|
|
|
- skb->csum_level = 1;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- skb->ip_summed = port->switch_port ? CHECKSUM_NONE : CHECKSUM_PARTIAL;
|
|
|
-
|
|
|
- dev->stats.rx_packets++;
|
|
|
- dev->stats.rx_bytes += len;
|
|
|
- napi_gro_receive(&port->napi, skb);
|
|
|
- return 0;
|
|
|
-
|
|
|
-out_free_skb:
|
|
|
- kfree_skb(skb);
|
|
|
-
|
|
|
-out_dropped:
|
|
|
- dev->stats.rx_dropped++;
|
|
|
- return err;
|
|
|
-}
|
|
|
-
|
|
|
-static int vnet_send_ack(struct vnet_port *port, struct vio_dring_state *dr,
|
|
|
- u32 start, u32 end, u8 vio_dring_state)
|
|
|
-{
|
|
|
- struct vio_dring_data hdr = {
|
|
|
- .tag = {
|
|
|
- .type = VIO_TYPE_DATA,
|
|
|
- .stype = VIO_SUBTYPE_ACK,
|
|
|
- .stype_env = VIO_DRING_DATA,
|
|
|
- .sid = vio_send_sid(&port->vio),
|
|
|
- },
|
|
|
- .dring_ident = dr->ident,
|
|
|
- .start_idx = start,
|
|
|
- .end_idx = end,
|
|
|
- .state = vio_dring_state,
|
|
|
- };
|
|
|
- int err, delay;
|
|
|
- int retries = 0;
|
|
|
-
|
|
|
- hdr.seq = dr->snd_nxt;
|
|
|
- delay = 1;
|
|
|
- do {
|
|
|
- err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr));
|
|
|
- if (err > 0) {
|
|
|
- dr->snd_nxt++;
|
|
|
- break;
|
|
|
- }
|
|
|
- udelay(delay);
|
|
|
- if ((delay <<= 1) > 128)
|
|
|
- delay = 128;
|
|
|
- if (retries++ > VNET_MAX_RETRIES) {
|
|
|
- pr_info("ECONNRESET %x:%x:%x:%x:%x:%x\n",
|
|
|
- port->raddr[0], port->raddr[1],
|
|
|
- port->raddr[2], port->raddr[3],
|
|
|
- port->raddr[4], port->raddr[5]);
|
|
|
- break;
|
|
|
- }
|
|
|
- } while (err == -EAGAIN);
|
|
|
-
|
|
|
- if (err <= 0 && vio_dring_state == VIO_DRING_STOPPED) {
|
|
|
- port->stop_rx_idx = end;
|
|
|
- port->stop_rx = true;
|
|
|
- } else {
|
|
|
- port->stop_rx_idx = 0;
|
|
|
- port->stop_rx = false;
|
|
|
- }
|
|
|
-
|
|
|
- return err;
|
|
|
-}
|
|
|
-
|
|
|
-static struct vio_net_desc *get_rx_desc(struct vnet_port *port,
|
|
|
- struct vio_dring_state *dr,
|
|
|
- u32 index)
|
|
|
-{
|
|
|
- struct vio_net_desc *desc = port->vio.desc_buf;
|
|
|
- int err;
|
|
|
-
|
|
|
- err = ldc_get_dring_entry(port->vio.lp, desc, dr->entry_size,
|
|
|
- (index * dr->entry_size),
|
|
|
- dr->cookies, dr->ncookies);
|
|
|
- if (err < 0)
|
|
|
- return ERR_PTR(err);
|
|
|
-
|
|
|
- return desc;
|
|
|
-}
|
|
|
-
|
|
|
-static int put_rx_desc(struct vnet_port *port,
|
|
|
- struct vio_dring_state *dr,
|
|
|
- struct vio_net_desc *desc,
|
|
|
- u32 index)
|
|
|
-{
|
|
|
- int err;
|
|
|
-
|
|
|
- err = ldc_put_dring_entry(port->vio.lp, desc, dr->entry_size,
|
|
|
- (index * dr->entry_size),
|
|
|
- dr->cookies, dr->ncookies);
|
|
|
- if (err < 0)
|
|
|
- return err;
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int vnet_walk_rx_one(struct vnet_port *port,
|
|
|
- struct vio_dring_state *dr,
|
|
|
- u32 index, int *needs_ack)
|
|
|
-{
|
|
|
- struct vio_net_desc *desc = get_rx_desc(port, dr, index);
|
|
|
- struct vio_driver_state *vio = &port->vio;
|
|
|
- int err;
|
|
|
-
|
|
|
- BUG_ON(desc == NULL);
|
|
|
- if (IS_ERR(desc))
|
|
|
- return PTR_ERR(desc);
|
|
|
-
|
|
|
- if (desc->hdr.state != VIO_DESC_READY)
|
|
|
- return 1;
|
|
|
-
|
|
|
- dma_rmb();
|
|
|
-
|
|
|
- viodbg(DATA, "vio_walk_rx_one desc[%02x:%02x:%08x:%08x:%llx:%llx]\n",
|
|
|
- desc->hdr.state, desc->hdr.ack,
|
|
|
- desc->size, desc->ncookies,
|
|
|
- desc->cookies[0].cookie_addr,
|
|
|
- desc->cookies[0].cookie_size);
|
|
|
-
|
|
|
- err = vnet_rx_one(port, desc);
|
|
|
- if (err == -ECONNRESET)
|
|
|
- return err;
|
|
|
- trace_vnet_rx_one(port->vio._local_sid, port->vio._peer_sid,
|
|
|
- index, desc->hdr.ack);
|
|
|
- desc->hdr.state = VIO_DESC_DONE;
|
|
|
- err = put_rx_desc(port, dr, desc, index);
|
|
|
- if (err < 0)
|
|
|
- return err;
|
|
|
- *needs_ack = desc->hdr.ack;
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int vnet_walk_rx(struct vnet_port *port, struct vio_dring_state *dr,
|
|
|
- u32 start, u32 end, int *npkts, int budget)
|
|
|
-{
|
|
|
- struct vio_driver_state *vio = &port->vio;
|
|
|
- int ack_start = -1, ack_end = -1;
|
|
|
- bool send_ack = true;
|
|
|
-
|
|
|
- end = (end == (u32) -1) ? vio_dring_prev(dr, start)
|
|
|
- : vio_dring_next(dr, end);
|
|
|
-
|
|
|
- viodbg(DATA, "vnet_walk_rx start[%08x] end[%08x]\n", start, end);
|
|
|
-
|
|
|
- while (start != end) {
|
|
|
- int ack = 0, err = vnet_walk_rx_one(port, dr, start, &ack);
|
|
|
- if (err == -ECONNRESET)
|
|
|
- return err;
|
|
|
- if (err != 0)
|
|
|
- break;
|
|
|
- (*npkts)++;
|
|
|
- if (ack_start == -1)
|
|
|
- ack_start = start;
|
|
|
- ack_end = start;
|
|
|
- start = vio_dring_next(dr, start);
|
|
|
- if (ack && start != end) {
|
|
|
- err = vnet_send_ack(port, dr, ack_start, ack_end,
|
|
|
- VIO_DRING_ACTIVE);
|
|
|
- if (err == -ECONNRESET)
|
|
|
- return err;
|
|
|
- ack_start = -1;
|
|
|
- }
|
|
|
- if ((*npkts) >= budget) {
|
|
|
- send_ack = false;
|
|
|
- break;
|
|
|
- }
|
|
|
- }
|
|
|
- if (unlikely(ack_start == -1))
|
|
|
- ack_start = ack_end = vio_dring_prev(dr, start);
|
|
|
- if (send_ack) {
|
|
|
- port->napi_resume = false;
|
|
|
- trace_vnet_tx_send_stopped_ack(port->vio._local_sid,
|
|
|
- port->vio._peer_sid,
|
|
|
- ack_end, *npkts);
|
|
|
- return vnet_send_ack(port, dr, ack_start, ack_end,
|
|
|
- VIO_DRING_STOPPED);
|
|
|
- } else {
|
|
|
- trace_vnet_tx_defer_stopped_ack(port->vio._local_sid,
|
|
|
- port->vio._peer_sid,
|
|
|
- ack_end, *npkts);
|
|
|
- port->napi_resume = true;
|
|
|
- port->napi_stop_idx = ack_end;
|
|
|
- return 1;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static int vnet_rx(struct vnet_port *port, void *msgbuf, int *npkts,
|
|
|
- int budget)
|
|
|
-{
|
|
|
- struct vio_dring_data *pkt = msgbuf;
|
|
|
- struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_RX_RING];
|
|
|
- struct vio_driver_state *vio = &port->vio;
|
|
|
-
|
|
|
- viodbg(DATA, "vnet_rx stype_env[%04x] seq[%016llx] rcv_nxt[%016llx]\n",
|
|
|
- pkt->tag.stype_env, pkt->seq, dr->rcv_nxt);
|
|
|
-
|
|
|
- if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA))
|
|
|
- return 0;
|
|
|
- if (unlikely(pkt->seq != dr->rcv_nxt)) {
|
|
|
- pr_err("RX out of sequence seq[0x%llx] rcv_nxt[0x%llx]\n",
|
|
|
- pkt->seq, dr->rcv_nxt);
|
|
|
- return 0;
|
|
|
- }
|
|
|
-
|
|
|
- if (!port->napi_resume)
|
|
|
- dr->rcv_nxt++;
|
|
|
-
|
|
|
- /* XXX Validate pkt->start_idx and pkt->end_idx XXX */
|
|
|
-
|
|
|
- return vnet_walk_rx(port, dr, pkt->start_idx, pkt->end_idx,
|
|
|
- npkts, budget);
|
|
|
-}
|
|
|
-
|
|
|
-static int idx_is_pending(struct vio_dring_state *dr, u32 end)
|
|
|
-{
|
|
|
- u32 idx = dr->cons;
|
|
|
- int found = 0;
|
|
|
-
|
|
|
- while (idx != dr->prod) {
|
|
|
- if (idx == end) {
|
|
|
- found = 1;
|
|
|
- break;
|
|
|
- }
|
|
|
- idx = vio_dring_next(dr, idx);
|
|
|
- }
|
|
|
- return found;
|
|
|
-}
|
|
|
-
|
|
|
-static int vnet_ack(struct vnet_port *port, void *msgbuf)
|
|
|
-{
|
|
|
- struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
|
|
|
- struct vio_dring_data *pkt = msgbuf;
|
|
|
- struct net_device *dev;
|
|
|
- struct vnet *vp;
|
|
|
- u32 end;
|
|
|
- struct vio_net_desc *desc;
|
|
|
- struct netdev_queue *txq;
|
|
|
-
|
|
|
- if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA))
|
|
|
- return 0;
|
|
|
-
|
|
|
- end = pkt->end_idx;
|
|
|
- vp = port->vp;
|
|
|
- dev = vp->dev;
|
|
|
- netif_tx_lock(dev);
|
|
|
- if (unlikely(!idx_is_pending(dr, end))) {
|
|
|
- netif_tx_unlock(dev);
|
|
|
- return 0;
|
|
|
- }
|
|
|
-
|
|
|
- /* sync for race conditions with vnet_start_xmit() and tell xmit it
|
|
|
- * is time to send a trigger.
|
|
|
- */
|
|
|
- trace_vnet_rx_stopped_ack(port->vio._local_sid,
|
|
|
- port->vio._peer_sid, end);
|
|
|
- dr->cons = vio_dring_next(dr, end);
|
|
|
- desc = vio_dring_entry(dr, dr->cons);
|
|
|
- if (desc->hdr.state == VIO_DESC_READY && !port->start_cons) {
|
|
|
- /* vnet_start_xmit() just populated this dring but missed
|
|
|
- * sending the "start" LDC message to the consumer.
|
|
|
- * Send a "start" trigger on its behalf.
|
|
|
- */
|
|
|
- if (__vnet_tx_trigger(port, dr->cons) > 0)
|
|
|
- port->start_cons = false;
|
|
|
- else
|
|
|
- port->start_cons = true;
|
|
|
- } else {
|
|
|
- port->start_cons = true;
|
|
|
- }
|
|
|
- netif_tx_unlock(dev);
|
|
|
-
|
|
|
- txq = netdev_get_tx_queue(dev, port->q_index);
|
|
|
- if (unlikely(netif_tx_queue_stopped(txq) &&
|
|
|
- vnet_tx_dring_avail(dr) >= VNET_TX_WAKEUP_THRESH(dr)))
|
|
|
- return 1;
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int vnet_nack(struct vnet_port *port, void *msgbuf)
|
|
|
-{
|
|
|
- /* XXX just reset or similar XXX */
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int handle_mcast(struct vnet_port *port, void *msgbuf)
|
|
|
-{
|
|
|
- struct vio_net_mcast_info *pkt = msgbuf;
|
|
|
-
|
|
|
- if (pkt->tag.stype != VIO_SUBTYPE_ACK)
|
|
|
- pr_err("%s: Got unexpected MCAST reply [%02x:%02x:%04x:%08x]\n",
|
|
|
- port->vp->dev->name,
|
|
|
- pkt->tag.type,
|
|
|
- pkt->tag.stype,
|
|
|
- pkt->tag.stype_env,
|
|
|
- pkt->tag.sid);
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-/* Got back a STOPPED LDC message on port. If the queue is stopped,
|
|
|
- * wake it up so that we'll send out another START message at the
|
|
|
- * next TX.
|
|
|
- */
|
|
|
-static void maybe_tx_wakeup(struct vnet_port *port)
|
|
|
-{
|
|
|
- struct netdev_queue *txq;
|
|
|
-
|
|
|
- txq = netdev_get_tx_queue(port->vp->dev, port->q_index);
|
|
|
- __netif_tx_lock(txq, smp_processor_id());
|
|
|
- if (likely(netif_tx_queue_stopped(txq))) {
|
|
|
- struct vio_dring_state *dr;
|
|
|
-
|
|
|
- dr = &port->vio.drings[VIO_DRIVER_TX_RING];
|
|
|
- netif_tx_wake_queue(txq);
|
|
|
- }
|
|
|
- __netif_tx_unlock(txq);
|
|
|
-}
|
|
|
-
|
|
|
-static inline bool port_is_up(struct vnet_port *vnet)
|
|
|
-{
|
|
|
- struct vio_driver_state *vio = &vnet->vio;
|
|
|
-
|
|
|
- return !!(vio->hs_state & VIO_HS_COMPLETE);
|
|
|
-}
|
|
|
-
|
|
|
-static int vnet_event_napi(struct vnet_port *port, int budget)
|
|
|
-{
|
|
|
- struct vio_driver_state *vio = &port->vio;
|
|
|
- int tx_wakeup, err;
|
|
|
- int npkts = 0;
|
|
|
- int event = (port->rx_event & LDC_EVENT_RESET);
|
|
|
-
|
|
|
-ldc_ctrl:
|
|
|
- if (unlikely(event == LDC_EVENT_RESET ||
|
|
|
- event == LDC_EVENT_UP)) {
|
|
|
- vio_link_state_change(vio, event);
|
|
|
-
|
|
|
- if (event == LDC_EVENT_RESET) {
|
|
|
- vnet_port_reset(port);
|
|
|
- vio_port_up(vio);
|
|
|
- }
|
|
|
- port->rx_event = 0;
|
|
|
- return 0;
|
|
|
- }
|
|
|
- /* We may have multiple LDC events in rx_event. Unroll send_events() */
|
|
|
- event = (port->rx_event & LDC_EVENT_UP);
|
|
|
- port->rx_event &= ~(LDC_EVENT_RESET|LDC_EVENT_UP);
|
|
|
- if (event == LDC_EVENT_UP)
|
|
|
- goto ldc_ctrl;
|
|
|
- event = port->rx_event;
|
|
|
- if (!(event & LDC_EVENT_DATA_READY))
|
|
|
- return 0;
|
|
|
-
|
|
|
- /* we dont expect any other bits than RESET, UP, DATA_READY */
|
|
|
- BUG_ON(event != LDC_EVENT_DATA_READY);
|
|
|
-
|
|
|
- tx_wakeup = err = 0;
|
|
|
- while (1) {
|
|
|
- union {
|
|
|
- struct vio_msg_tag tag;
|
|
|
- u64 raw[8];
|
|
|
- } msgbuf;
|
|
|
-
|
|
|
- if (port->napi_resume) {
|
|
|
- struct vio_dring_data *pkt =
|
|
|
- (struct vio_dring_data *)&msgbuf;
|
|
|
- struct vio_dring_state *dr =
|
|
|
- &port->vio.drings[VIO_DRIVER_RX_RING];
|
|
|
-
|
|
|
- pkt->tag.type = VIO_TYPE_DATA;
|
|
|
- pkt->tag.stype = VIO_SUBTYPE_INFO;
|
|
|
- pkt->tag.stype_env = VIO_DRING_DATA;
|
|
|
- pkt->seq = dr->rcv_nxt;
|
|
|
- pkt->start_idx = vio_dring_next(dr, port->napi_stop_idx);
|
|
|
- pkt->end_idx = -1;
|
|
|
- goto napi_resume;
|
|
|
- }
|
|
|
- err = ldc_read(vio->lp, &msgbuf, sizeof(msgbuf));
|
|
|
- if (unlikely(err < 0)) {
|
|
|
- if (err == -ECONNRESET)
|
|
|
- vio_conn_reset(vio);
|
|
|
- break;
|
|
|
- }
|
|
|
- if (err == 0)
|
|
|
- break;
|
|
|
- viodbg(DATA, "TAG [%02x:%02x:%04x:%08x]\n",
|
|
|
- msgbuf.tag.type,
|
|
|
- msgbuf.tag.stype,
|
|
|
- msgbuf.tag.stype_env,
|
|
|
- msgbuf.tag.sid);
|
|
|
- err = vio_validate_sid(vio, &msgbuf.tag);
|
|
|
- if (err < 0)
|
|
|
- break;
|
|
|
-napi_resume:
|
|
|
- if (likely(msgbuf.tag.type == VIO_TYPE_DATA)) {
|
|
|
- if (msgbuf.tag.stype == VIO_SUBTYPE_INFO) {
|
|
|
- if (!port_is_up(port)) {
|
|
|
- /* failures like handshake_failure()
|
|
|
- * may have cleaned up dring, but
|
|
|
- * NAPI polling may bring us here.
|
|
|
- */
|
|
|
- err = -ECONNRESET;
|
|
|
- break;
|
|
|
- }
|
|
|
- err = vnet_rx(port, &msgbuf, &npkts, budget);
|
|
|
- if (npkts >= budget)
|
|
|
- break;
|
|
|
- if (npkts == 0)
|
|
|
- break;
|
|
|
- } else if (msgbuf.tag.stype == VIO_SUBTYPE_ACK) {
|
|
|
- err = vnet_ack(port, &msgbuf);
|
|
|
- if (err > 0)
|
|
|
- tx_wakeup |= err;
|
|
|
- } else if (msgbuf.tag.stype == VIO_SUBTYPE_NACK) {
|
|
|
- err = vnet_nack(port, &msgbuf);
|
|
|
- }
|
|
|
- } else if (msgbuf.tag.type == VIO_TYPE_CTRL) {
|
|
|
- if (msgbuf.tag.stype_env == VNET_MCAST_INFO)
|
|
|
- err = handle_mcast(port, &msgbuf);
|
|
|
- else
|
|
|
- err = vio_control_pkt_engine(vio, &msgbuf);
|
|
|
- if (err)
|
|
|
- break;
|
|
|
- } else {
|
|
|
- err = vnet_handle_unknown(port, &msgbuf);
|
|
|
- }
|
|
|
- if (err == -ECONNRESET)
|
|
|
- break;
|
|
|
- }
|
|
|
- if (unlikely(tx_wakeup && err != -ECONNRESET))
|
|
|
- maybe_tx_wakeup(port);
|
|
|
- return npkts;
|
|
|
-}
|
|
|
-
|
|
|
-static int vnet_poll(struct napi_struct *napi, int budget)
|
|
|
-{
|
|
|
- struct vnet_port *port = container_of(napi, struct vnet_port, napi);
|
|
|
- struct vio_driver_state *vio = &port->vio;
|
|
|
- int processed = vnet_event_napi(port, budget);
|
|
|
-
|
|
|
- if (processed < budget) {
|
|
|
- napi_complete(napi);
|
|
|
- port->rx_event &= ~LDC_EVENT_DATA_READY;
|
|
|
- vio_set_intr(vio->vdev->rx_ino, HV_INTR_ENABLED);
|
|
|
- }
|
|
|
- return processed;
|
|
|
-}
|
|
|
-
|
|
|
-static void vnet_event(void *arg, int event)
|
|
|
-{
|
|
|
- struct vnet_port *port = arg;
|
|
|
- struct vio_driver_state *vio = &port->vio;
|
|
|
-
|
|
|
- port->rx_event |= event;
|
|
|
- vio_set_intr(vio->vdev->rx_ino, HV_INTR_DISABLED);
|
|
|
- napi_schedule(&port->napi);
|
|
|
-
|
|
|
-}
|
|
|
-
|
|
|
-static int __vnet_tx_trigger(struct vnet_port *port, u32 start)
|
|
|
-{
|
|
|
- struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
|
|
|
- struct vio_dring_data hdr = {
|
|
|
- .tag = {
|
|
|
- .type = VIO_TYPE_DATA,
|
|
|
- .stype = VIO_SUBTYPE_INFO,
|
|
|
- .stype_env = VIO_DRING_DATA,
|
|
|
- .sid = vio_send_sid(&port->vio),
|
|
|
- },
|
|
|
- .dring_ident = dr->ident,
|
|
|
- .start_idx = start,
|
|
|
- .end_idx = (u32) -1,
|
|
|
- };
|
|
|
- int err, delay;
|
|
|
- int retries = 0;
|
|
|
-
|
|
|
- if (port->stop_rx) {
|
|
|
- trace_vnet_tx_pending_stopped_ack(port->vio._local_sid,
|
|
|
- port->vio._peer_sid,
|
|
|
- port->stop_rx_idx, -1);
|
|
|
- err = vnet_send_ack(port,
|
|
|
- &port->vio.drings[VIO_DRIVER_RX_RING],
|
|
|
- port->stop_rx_idx, -1,
|
|
|
- VIO_DRING_STOPPED);
|
|
|
- if (err <= 0)
|
|
|
- return err;
|
|
|
- }
|
|
|
-
|
|
|
- hdr.seq = dr->snd_nxt;
|
|
|
- delay = 1;
|
|
|
- do {
|
|
|
- err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr));
|
|
|
- if (err > 0) {
|
|
|
- dr->snd_nxt++;
|
|
|
- break;
|
|
|
- }
|
|
|
- udelay(delay);
|
|
|
- if ((delay <<= 1) > 128)
|
|
|
- delay = 128;
|
|
|
- if (retries++ > VNET_MAX_RETRIES)
|
|
|
- break;
|
|
|
- } while (err == -EAGAIN);
|
|
|
- trace_vnet_tx_trigger(port->vio._local_sid,
|
|
|
- port->vio._peer_sid, start, err);
|
|
|
-
|
|
|
- return err;
|
|
|
-}
|
|
|
-
|
|
|
-struct vnet_port *__tx_port_find(struct vnet *vp, struct sk_buff *skb)
|
|
|
-{
|
|
|
- unsigned int hash = vnet_hashfn(skb->data);
|
|
|
- struct hlist_head *hp = &vp->port_hash[hash];
|
|
|
- struct vnet_port *port;
|
|
|
-
|
|
|
- hlist_for_each_entry_rcu(port, hp, hash) {
|
|
|
- if (!port_is_up(port))
|
|
|
- continue;
|
|
|
- if (ether_addr_equal(port->raddr, skb->data))
|
|
|
- return port;
|
|
|
- }
|
|
|
- list_for_each_entry_rcu(port, &vp->port_list, list) {
|
|
|
- if (!port->switch_port)
|
|
|
- continue;
|
|
|
- if (!port_is_up(port))
|
|
|
- continue;
|
|
|
- return port;
|
|
|
- }
|
|
|
- return NULL;
|
|
|
-}
|
|
|
-
|
|
|
-static struct sk_buff *vnet_clean_tx_ring(struct vnet_port *port,
|
|
|
- unsigned *pending)
|
|
|
-{
|
|
|
- struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
|
|
|
- struct sk_buff *skb = NULL;
|
|
|
- int i, txi;
|
|
|
-
|
|
|
- *pending = 0;
|
|
|
-
|
|
|
- txi = dr->prod;
|
|
|
- for (i = 0; i < VNET_TX_RING_SIZE; ++i) {
|
|
|
- struct vio_net_desc *d;
|
|
|
-
|
|
|
- --txi;
|
|
|
- if (txi < 0)
|
|
|
- txi = VNET_TX_RING_SIZE-1;
|
|
|
-
|
|
|
- d = vio_dring_entry(dr, txi);
|
|
|
-
|
|
|
- if (d->hdr.state == VIO_DESC_READY) {
|
|
|
- (*pending)++;
|
|
|
- continue;
|
|
|
- }
|
|
|
- if (port->tx_bufs[txi].skb) {
|
|
|
- if (d->hdr.state != VIO_DESC_DONE)
|
|
|
- pr_notice("invalid ring buffer state %d\n",
|
|
|
- d->hdr.state);
|
|
|
- BUG_ON(port->tx_bufs[txi].skb->next);
|
|
|
-
|
|
|
- port->tx_bufs[txi].skb->next = skb;
|
|
|
- skb = port->tx_bufs[txi].skb;
|
|
|
- port->tx_bufs[txi].skb = NULL;
|
|
|
-
|
|
|
- ldc_unmap(port->vio.lp,
|
|
|
- port->tx_bufs[txi].cookies,
|
|
|
- port->tx_bufs[txi].ncookies);
|
|
|
- } else if (d->hdr.state == VIO_DESC_FREE)
|
|
|
- break;
|
|
|
- d->hdr.state = VIO_DESC_FREE;
|
|
|
- }
|
|
|
- return skb;
|
|
|
-}
|
|
|
-
|
|
|
-static inline void vnet_free_skbs(struct sk_buff *skb)
|
|
|
-{
|
|
|
- struct sk_buff *next;
|
|
|
-
|
|
|
- while (skb) {
|
|
|
- next = skb->next;
|
|
|
- skb->next = NULL;
|
|
|
- dev_kfree_skb(skb);
|
|
|
- skb = next;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static void vnet_clean_timer_expire(unsigned long port0)
|
|
|
-{
|
|
|
- struct vnet_port *port = (struct vnet_port *)port0;
|
|
|
- struct sk_buff *freeskbs;
|
|
|
- unsigned pending;
|
|
|
-
|
|
|
- netif_tx_lock(port->vp->dev);
|
|
|
- freeskbs = vnet_clean_tx_ring(port, &pending);
|
|
|
- netif_tx_unlock(port->vp->dev);
|
|
|
-
|
|
|
- vnet_free_skbs(freeskbs);
|
|
|
-
|
|
|
- if (pending)
|
|
|
- (void)mod_timer(&port->clean_timer,
|
|
|
- jiffies + VNET_CLEAN_TIMEOUT);
|
|
|
- else
|
|
|
- del_timer(&port->clean_timer);
|
|
|
-}
|
|
|
-
|
|
|
-static inline int vnet_skb_map(struct ldc_channel *lp, struct sk_buff *skb,
|
|
|
- struct ldc_trans_cookie *cookies, int ncookies,
|
|
|
- unsigned int map_perm)
|
|
|
-{
|
|
|
- int i, nc, err, blen;
|
|
|
-
|
|
|
- /* header */
|
|
|
- blen = skb_headlen(skb);
|
|
|
- if (blen < ETH_ZLEN)
|
|
|
- blen = ETH_ZLEN;
|
|
|
- blen += VNET_PACKET_SKIP;
|
|
|
- blen += 8 - (blen & 7);
|
|
|
-
|
|
|
- err = ldc_map_single(lp, skb->data-VNET_PACKET_SKIP, blen, cookies,
|
|
|
- ncookies, map_perm);
|
|
|
- if (err < 0)
|
|
|
- return err;
|
|
|
- nc = err;
|
|
|
-
|
|
|
- for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
|
|
|
- skb_frag_t *f = &skb_shinfo(skb)->frags[i];
|
|
|
- u8 *vaddr;
|
|
|
-
|
|
|
- if (nc < ncookies) {
|
|
|
- vaddr = kmap_atomic(skb_frag_page(f));
|
|
|
- blen = skb_frag_size(f);
|
|
|
- blen += 8 - (blen & 7);
|
|
|
- err = ldc_map_single(lp, vaddr + f->page_offset,
|
|
|
- blen, cookies + nc, ncookies - nc,
|
|
|
- map_perm);
|
|
|
- kunmap_atomic(vaddr);
|
|
|
- } else {
|
|
|
- err = -EMSGSIZE;
|
|
|
- }
|
|
|
-
|
|
|
- if (err < 0) {
|
|
|
- ldc_unmap(lp, cookies, nc);
|
|
|
- return err;
|
|
|
- }
|
|
|
- nc += err;
|
|
|
- }
|
|
|
- return nc;
|
|
|
-}
|
|
|
-
|
|
|
-static inline struct sk_buff *vnet_skb_shape(struct sk_buff *skb, int ncookies)
|
|
|
-{
|
|
|
- struct sk_buff *nskb;
|
|
|
- int i, len, pad, docopy;
|
|
|
-
|
|
|
- len = skb->len;
|
|
|
- pad = 0;
|
|
|
- if (len < ETH_ZLEN) {
|
|
|
- pad += ETH_ZLEN - skb->len;
|
|
|
- len += pad;
|
|
|
- }
|
|
|
- len += VNET_PACKET_SKIP;
|
|
|
- pad += 8 - (len & 7);
|
|
|
-
|
|
|
- /* make sure we have enough cookies and alignment in every frag */
|
|
|
- docopy = skb_shinfo(skb)->nr_frags >= ncookies;
|
|
|
- for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
|
|
|
- skb_frag_t *f = &skb_shinfo(skb)->frags[i];
|
|
|
-
|
|
|
- docopy |= f->page_offset & 7;
|
|
|
- }
|
|
|
- if (((unsigned long)skb->data & 7) != VNET_PACKET_SKIP ||
|
|
|
- skb_tailroom(skb) < pad ||
|
|
|
- skb_headroom(skb) < VNET_PACKET_SKIP || docopy) {
|
|
|
- int start = 0, offset;
|
|
|
- __wsum csum;
|
|
|
-
|
|
|
- len = skb->len > ETH_ZLEN ? skb->len : ETH_ZLEN;
|
|
|
- nskb = alloc_and_align_skb(skb->dev, len);
|
|
|
- if (nskb == NULL) {
|
|
|
- dev_kfree_skb(skb);
|
|
|
- return NULL;
|
|
|
- }
|
|
|
- skb_reserve(nskb, VNET_PACKET_SKIP);
|
|
|
-
|
|
|
- nskb->protocol = skb->protocol;
|
|
|
- offset = skb_mac_header(skb) - skb->data;
|
|
|
- skb_set_mac_header(nskb, offset);
|
|
|
- offset = skb_network_header(skb) - skb->data;
|
|
|
- skb_set_network_header(nskb, offset);
|
|
|
- offset = skb_transport_header(skb) - skb->data;
|
|
|
- skb_set_transport_header(nskb, offset);
|
|
|
-
|
|
|
- offset = 0;
|
|
|
- nskb->csum_offset = skb->csum_offset;
|
|
|
- nskb->ip_summed = skb->ip_summed;
|
|
|
-
|
|
|
- if (skb->ip_summed == CHECKSUM_PARTIAL)
|
|
|
- start = skb_checksum_start_offset(skb);
|
|
|
- if (start) {
|
|
|
- struct iphdr *iph = ip_hdr(nskb);
|
|
|
- int offset = start + nskb->csum_offset;
|
|
|
-
|
|
|
- if (skb_copy_bits(skb, 0, nskb->data, start)) {
|
|
|
- dev_kfree_skb(nskb);
|
|
|
- dev_kfree_skb(skb);
|
|
|
- return NULL;
|
|
|
- }
|
|
|
- *(__sum16 *)(skb->data + offset) = 0;
|
|
|
- csum = skb_copy_and_csum_bits(skb, start,
|
|
|
- nskb->data + start,
|
|
|
- skb->len - start, 0);
|
|
|
- if (iph->protocol == IPPROTO_TCP ||
|
|
|
- iph->protocol == IPPROTO_UDP) {
|
|
|
- csum = csum_tcpudp_magic(iph->saddr, iph->daddr,
|
|
|
- skb->len - start,
|
|
|
- iph->protocol, csum);
|
|
|
- }
|
|
|
- *(__sum16 *)(nskb->data + offset) = csum;
|
|
|
-
|
|
|
- nskb->ip_summed = CHECKSUM_NONE;
|
|
|
- } else if (skb_copy_bits(skb, 0, nskb->data, skb->len)) {
|
|
|
- dev_kfree_skb(nskb);
|
|
|
- dev_kfree_skb(skb);
|
|
|
- return NULL;
|
|
|
- }
|
|
|
- (void)skb_put(nskb, skb->len);
|
|
|
- if (skb_is_gso(skb)) {
|
|
|
- skb_shinfo(nskb)->gso_size = skb_shinfo(skb)->gso_size;
|
|
|
- skb_shinfo(nskb)->gso_type = skb_shinfo(skb)->gso_type;
|
|
|
- }
|
|
|
- nskb->queue_mapping = skb->queue_mapping;
|
|
|
- dev_kfree_skb(skb);
|
|
|
- skb = nskb;
|
|
|
- }
|
|
|
- return skb;
|
|
|
-}
|
|
|
-
|
|
|
-static u16
|
|
|
-vnet_select_queue(struct net_device *dev, struct sk_buff *skb,
|
|
|
- void *accel_priv, select_queue_fallback_t fallback)
|
|
|
-{
|
|
|
- struct vnet *vp = netdev_priv(dev);
|
|
|
- struct vnet_port *port = __tx_port_find(vp, skb);
|
|
|
-
|
|
|
- if (port == NULL)
|
|
|
- return 0;
|
|
|
- return port->q_index;
|
|
|
-}
|
|
|
-
|
|
|
-static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev);
|
|
|
-
|
|
|
-static int vnet_handle_offloads(struct vnet_port *port, struct sk_buff *skb)
|
|
|
-{
|
|
|
- struct net_device *dev = port->vp->dev;
|
|
|
- struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
|
|
|
- struct sk_buff *segs;
|
|
|
- int maclen, datalen;
|
|
|
- int status;
|
|
|
- int gso_size, gso_type, gso_segs;
|
|
|
- int hlen = skb_transport_header(skb) - skb_mac_header(skb);
|
|
|
- int proto = IPPROTO_IP;
|
|
|
-
|
|
|
- if (skb->protocol == htons(ETH_P_IP))
|
|
|
- proto = ip_hdr(skb)->protocol;
|
|
|
- else if (skb->protocol == htons(ETH_P_IPV6))
|
|
|
- proto = ipv6_hdr(skb)->nexthdr;
|
|
|
-
|
|
|
- if (proto == IPPROTO_TCP)
|
|
|
- hlen += tcp_hdr(skb)->doff * 4;
|
|
|
- else if (proto == IPPROTO_UDP)
|
|
|
- hlen += sizeof(struct udphdr);
|
|
|
- else {
|
|
|
- pr_err("vnet_handle_offloads GSO with unknown transport "
|
|
|
- "protocol %d tproto %d\n", skb->protocol, proto);
|
|
|
- hlen = 128; /* XXX */
|
|
|
- }
|
|
|
- datalen = port->tsolen - hlen;
|
|
|
-
|
|
|
- gso_size = skb_shinfo(skb)->gso_size;
|
|
|
- gso_type = skb_shinfo(skb)->gso_type;
|
|
|
- gso_segs = skb_shinfo(skb)->gso_segs;
|
|
|
-
|
|
|
- if (port->tso && gso_size < datalen)
|
|
|
- gso_segs = DIV_ROUND_UP(skb->len - hlen, datalen);
|
|
|
-
|
|
|
- if (unlikely(vnet_tx_dring_avail(dr) < gso_segs)) {
|
|
|
- struct netdev_queue *txq;
|
|
|
-
|
|
|
- txq = netdev_get_tx_queue(dev, port->q_index);
|
|
|
- netif_tx_stop_queue(txq);
|
|
|
- if (vnet_tx_dring_avail(dr) < skb_shinfo(skb)->gso_segs)
|
|
|
- return NETDEV_TX_BUSY;
|
|
|
- netif_tx_wake_queue(txq);
|
|
|
- }
|
|
|
-
|
|
|
- maclen = skb_network_header(skb) - skb_mac_header(skb);
|
|
|
- skb_pull(skb, maclen);
|
|
|
-
|
|
|
- if (port->tso && gso_size < datalen) {
|
|
|
- if (skb_unclone(skb, GFP_ATOMIC))
|
|
|
- goto out_dropped;
|
|
|
-
|
|
|
- /* segment to TSO size */
|
|
|
- skb_shinfo(skb)->gso_size = datalen;
|
|
|
- skb_shinfo(skb)->gso_segs = gso_segs;
|
|
|
- }
|
|
|
- segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO);
|
|
|
- if (IS_ERR(segs))
|
|
|
- goto out_dropped;
|
|
|
-
|
|
|
- skb_push(skb, maclen);
|
|
|
- skb_reset_mac_header(skb);
|
|
|
-
|
|
|
- status = 0;
|
|
|
- while (segs) {
|
|
|
- struct sk_buff *curr = segs;
|
|
|
-
|
|
|
- segs = segs->next;
|
|
|
- curr->next = NULL;
|
|
|
- if (port->tso && curr->len > dev->mtu) {
|
|
|
- skb_shinfo(curr)->gso_size = gso_size;
|
|
|
- skb_shinfo(curr)->gso_type = gso_type;
|
|
|
- skb_shinfo(curr)->gso_segs =
|
|
|
- DIV_ROUND_UP(curr->len - hlen, gso_size);
|
|
|
- } else
|
|
|
- skb_shinfo(curr)->gso_size = 0;
|
|
|
-
|
|
|
- skb_push(curr, maclen);
|
|
|
- skb_reset_mac_header(curr);
|
|
|
- memcpy(skb_mac_header(curr), skb_mac_header(skb),
|
|
|
- maclen);
|
|
|
- curr->csum_start = skb_transport_header(curr) - curr->head;
|
|
|
- if (ip_hdr(curr)->protocol == IPPROTO_TCP)
|
|
|
- curr->csum_offset = offsetof(struct tcphdr, check);
|
|
|
- else if (ip_hdr(curr)->protocol == IPPROTO_UDP)
|
|
|
- curr->csum_offset = offsetof(struct udphdr, check);
|
|
|
-
|
|
|
- if (!(status & NETDEV_TX_MASK))
|
|
|
- status = vnet_start_xmit(curr, dev);
|
|
|
- if (status & NETDEV_TX_MASK)
|
|
|
- dev_kfree_skb_any(curr);
|
|
|
- }
|
|
|
-
|
|
|
- if (!(status & NETDEV_TX_MASK))
|
|
|
- dev_kfree_skb_any(skb);
|
|
|
- return status;
|
|
|
-out_dropped:
|
|
|
- dev->stats.tx_dropped++;
|
|
|
- dev_kfree_skb_any(skb);
|
|
|
- return NETDEV_TX_OK;
|
|
|
-}
|
|
|
-
|
|
|
-static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
|
-{
|
|
|
- struct vnet *vp = netdev_priv(dev);
|
|
|
- struct vnet_port *port = NULL;
|
|
|
- struct vio_dring_state *dr;
|
|
|
- struct vio_net_desc *d;
|
|
|
- unsigned int len;
|
|
|
- struct sk_buff *freeskbs = NULL;
|
|
|
- int i, err, txi;
|
|
|
- unsigned pending = 0;
|
|
|
- struct netdev_queue *txq;
|
|
|
-
|
|
|
- rcu_read_lock();
|
|
|
- port = __tx_port_find(vp, skb);
|
|
|
- if (unlikely(!port)) {
|
|
|
- rcu_read_unlock();
|
|
|
- goto out_dropped;
|
|
|
- }
|
|
|
-
|
|
|
- if (skb_is_gso(skb) && skb->len > port->tsolen) {
|
|
|
- err = vnet_handle_offloads(port, skb);
|
|
|
- rcu_read_unlock();
|
|
|
- return err;
|
|
|
- }
|
|
|
-
|
|
|
- if (!skb_is_gso(skb) && skb->len > port->rmtu) {
|
|
|
- unsigned long localmtu = port->rmtu - ETH_HLEN;
|
|
|
-
|
|
|
- if (vio_version_after_eq(&port->vio, 1, 3))
|
|
|
- localmtu -= VLAN_HLEN;
|
|
|
-
|
|
|
- if (skb->protocol == htons(ETH_P_IP)) {
|
|
|
- struct flowi4 fl4;
|
|
|
- struct rtable *rt = NULL;
|
|
|
-
|
|
|
- memset(&fl4, 0, sizeof(fl4));
|
|
|
- fl4.flowi4_oif = dev->ifindex;
|
|
|
- fl4.flowi4_tos = RT_TOS(ip_hdr(skb)->tos);
|
|
|
- fl4.daddr = ip_hdr(skb)->daddr;
|
|
|
- fl4.saddr = ip_hdr(skb)->saddr;
|
|
|
-
|
|
|
- rt = ip_route_output_key(dev_net(dev), &fl4);
|
|
|
- rcu_read_unlock();
|
|
|
- if (!IS_ERR(rt)) {
|
|
|
- skb_dst_set(skb, &rt->dst);
|
|
|
- icmp_send(skb, ICMP_DEST_UNREACH,
|
|
|
- ICMP_FRAG_NEEDED,
|
|
|
- htonl(localmtu));
|
|
|
- }
|
|
|
- }
|
|
|
-#if IS_ENABLED(CONFIG_IPV6)
|
|
|
- else if (skb->protocol == htons(ETH_P_IPV6))
|
|
|
- icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, localmtu);
|
|
|
-#endif
|
|
|
- goto out_dropped;
|
|
|
- }
|
|
|
-
|
|
|
- skb = vnet_skb_shape(skb, 2);
|
|
|
-
|
|
|
- if (unlikely(!skb))
|
|
|
- goto out_dropped;
|
|
|
-
|
|
|
- if (skb->ip_summed == CHECKSUM_PARTIAL)
|
|
|
- vnet_fullcsum(skb);
|
|
|
-
|
|
|
- dr = &port->vio.drings[VIO_DRIVER_TX_RING];
|
|
|
- i = skb_get_queue_mapping(skb);
|
|
|
- txq = netdev_get_tx_queue(dev, i);
|
|
|
- if (unlikely(vnet_tx_dring_avail(dr) < 1)) {
|
|
|
- if (!netif_tx_queue_stopped(txq)) {
|
|
|
- netif_tx_stop_queue(txq);
|
|
|
-
|
|
|
- /* This is a hard error, log it. */
|
|
|
- netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
|
|
|
- dev->stats.tx_errors++;
|
|
|
- }
|
|
|
- rcu_read_unlock();
|
|
|
- return NETDEV_TX_BUSY;
|
|
|
- }
|
|
|
-
|
|
|
- d = vio_dring_cur(dr);
|
|
|
-
|
|
|
- txi = dr->prod;
|
|
|
-
|
|
|
- freeskbs = vnet_clean_tx_ring(port, &pending);
|
|
|
-
|
|
|
- BUG_ON(port->tx_bufs[txi].skb);
|
|
|
-
|
|
|
- len = skb->len;
|
|
|
- if (len < ETH_ZLEN)
|
|
|
- len = ETH_ZLEN;
|
|
|
-
|
|
|
- err = vnet_skb_map(port->vio.lp, skb, port->tx_bufs[txi].cookies, 2,
|
|
|
- (LDC_MAP_SHADOW | LDC_MAP_DIRECT | LDC_MAP_RW));
|
|
|
- if (err < 0) {
|
|
|
- netdev_info(dev, "tx buffer map error %d\n", err);
|
|
|
- goto out_dropped;
|
|
|
- }
|
|
|
-
|
|
|
- port->tx_bufs[txi].skb = skb;
|
|
|
- skb = NULL;
|
|
|
- port->tx_bufs[txi].ncookies = err;
|
|
|
-
|
|
|
- /* We don't rely on the ACKs to free the skb in vnet_start_xmit(),
|
|
|
- * thus it is safe to not set VIO_ACK_ENABLE for each transmission:
|
|
|
- * the protocol itself does not require it as long as the peer
|
|
|
- * sends a VIO_SUBTYPE_ACK for VIO_DRING_STOPPED.
|
|
|
- *
|
|
|
- * An ACK for every packet in the ring is expensive as the
|
|
|
- * sending of LDC messages is slow and affects performance.
|
|
|
- */
|
|
|
- d->hdr.ack = VIO_ACK_DISABLE;
|
|
|
- d->size = len;
|
|
|
- d->ncookies = port->tx_bufs[txi].ncookies;
|
|
|
- for (i = 0; i < d->ncookies; i++)
|
|
|
- d->cookies[i] = port->tx_bufs[txi].cookies[i];
|
|
|
- if (vio_version_after_eq(&port->vio, 1, 7)) {
|
|
|
- struct vio_net_dext *dext = vio_net_ext(d);
|
|
|
-
|
|
|
- memset(dext, 0, sizeof(*dext));
|
|
|
- if (skb_is_gso(port->tx_bufs[txi].skb)) {
|
|
|
- dext->ipv4_lso_mss = skb_shinfo(port->tx_bufs[txi].skb)
|
|
|
- ->gso_size;
|
|
|
- dext->flags |= VNET_PKT_IPV4_LSO;
|
|
|
- }
|
|
|
- if (vio_version_after_eq(&port->vio, 1, 8) &&
|
|
|
- !port->switch_port) {
|
|
|
- dext->flags |= VNET_PKT_HCK_IPV4_HDRCKSUM_OK;
|
|
|
- dext->flags |= VNET_PKT_HCK_FULLCKSUM_OK;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* This has to be a non-SMP write barrier because we are writing
|
|
|
- * to memory which is shared with the peer LDOM.
|
|
|
- */
|
|
|
- dma_wmb();
|
|
|
-
|
|
|
- d->hdr.state = VIO_DESC_READY;
|
|
|
-
|
|
|
- /* Exactly one ldc "start" trigger (for dr->cons) needs to be sent
|
|
|
- * to notify the consumer that some descriptors are READY.
|
|
|
- * After that "start" trigger, no additional triggers are needed until
|
|
|
- * a DRING_STOPPED is received from the consumer. The dr->cons field
|
|
|
- * (set up by vnet_ack()) has the value of the next dring index
|
|
|
- * that has not yet been ack-ed. We send a "start" trigger here
|
|
|
- * if, and only if, start_cons is true (reset it afterward). Conversely,
|
|
|
- * vnet_ack() should check if the dring corresponding to cons
|
|
|
- * is marked READY, but start_cons was false.
|
|
|
- * If so, vnet_ack() should send out the missed "start" trigger.
|
|
|
- *
|
|
|
- * Note that the dma_wmb() above makes sure the cookies et al. are
|
|
|
- * not globally visible before the VIO_DESC_READY, and that the
|
|
|
- * stores are ordered correctly by the compiler. The consumer will
|
|
|
- * not proceed until the VIO_DESC_READY is visible assuring that
|
|
|
- * the consumer does not observe anything related to descriptors
|
|
|
- * out of order. The HV trap from the LDC start trigger is the
|
|
|
- * producer to consumer announcement that work is available to the
|
|
|
- * consumer
|
|
|
- */
|
|
|
- if (!port->start_cons) { /* previous trigger suffices */
|
|
|
- trace_vnet_skip_tx_trigger(port->vio._local_sid,
|
|
|
- port->vio._peer_sid, dr->cons);
|
|
|
- goto ldc_start_done;
|
|
|
- }
|
|
|
-
|
|
|
- err = __vnet_tx_trigger(port, dr->cons);
|
|
|
- if (unlikely(err < 0)) {
|
|
|
- netdev_info(dev, "TX trigger error %d\n", err);
|
|
|
- d->hdr.state = VIO_DESC_FREE;
|
|
|
- skb = port->tx_bufs[txi].skb;
|
|
|
- port->tx_bufs[txi].skb = NULL;
|
|
|
- dev->stats.tx_carrier_errors++;
|
|
|
- goto out_dropped;
|
|
|
- }
|
|
|
-
|
|
|
-ldc_start_done:
|
|
|
- port->start_cons = false;
|
|
|
-
|
|
|
- dev->stats.tx_packets++;
|
|
|
- dev->stats.tx_bytes += port->tx_bufs[txi].skb->len;
|
|
|
-
|
|
|
- dr->prod = (dr->prod + 1) & (VNET_TX_RING_SIZE - 1);
|
|
|
- if (unlikely(vnet_tx_dring_avail(dr) < 1)) {
|
|
|
- netif_tx_stop_queue(txq);
|
|
|
- if (vnet_tx_dring_avail(dr) > VNET_TX_WAKEUP_THRESH(dr))
|
|
|
- netif_tx_wake_queue(txq);
|
|
|
- }
|
|
|
-
|
|
|
- (void)mod_timer(&port->clean_timer, jiffies + VNET_CLEAN_TIMEOUT);
|
|
|
- rcu_read_unlock();
|
|
|
-
|
|
|
- vnet_free_skbs(freeskbs);
|
|
|
-
|
|
|
- return NETDEV_TX_OK;
|
|
|
-
|
|
|
-out_dropped:
|
|
|
- if (pending)
|
|
|
- (void)mod_timer(&port->clean_timer,
|
|
|
- jiffies + VNET_CLEAN_TIMEOUT);
|
|
|
- else if (port)
|
|
|
- del_timer(&port->clean_timer);
|
|
|
- if (port)
|
|
|
- rcu_read_unlock();
|
|
|
- if (skb)
|
|
|
- dev_kfree_skb(skb);
|
|
|
- vnet_free_skbs(freeskbs);
|
|
|
- dev->stats.tx_dropped++;
|
|
|
- return NETDEV_TX_OK;
|
|
|
-}
|
|
|
-
|
|
|
-static void vnet_tx_timeout(struct net_device *dev)
|
|
|
-{
|
|
|
- /* XXX Implement me XXX */
|
|
|
-}
|
|
|
-
|
|
|
-static int vnet_open(struct net_device *dev)
|
|
|
-{
|
|
|
- netif_carrier_on(dev);
|
|
|
- netif_tx_start_all_queues(dev);
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int vnet_close(struct net_device *dev)
|
|
|
-{
|
|
|
- netif_tx_stop_all_queues(dev);
|
|
|
- netif_carrier_off(dev);
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static struct vnet_mcast_entry *__vnet_mc_find(struct vnet *vp, u8 *addr)
|
|
|
-{
|
|
|
- struct vnet_mcast_entry *m;
|
|
|
-
|
|
|
- for (m = vp->mcast_list; m; m = m->next) {
|
|
|
- if (ether_addr_equal(m->addr, addr))
|
|
|
- return m;
|
|
|
- }
|
|
|
- return NULL;
|
|
|
-}
|
|
|
-
|
|
|
-static void __update_mc_list(struct vnet *vp, struct net_device *dev)
|
|
|
-{
|
|
|
- struct netdev_hw_addr *ha;
|
|
|
-
|
|
|
- netdev_for_each_mc_addr(ha, dev) {
|
|
|
- struct vnet_mcast_entry *m;
|
|
|
-
|
|
|
- m = __vnet_mc_find(vp, ha->addr);
|
|
|
- if (m) {
|
|
|
- m->hit = 1;
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- if (!m) {
|
|
|
- m = kzalloc(sizeof(*m), GFP_ATOMIC);
|
|
|
- if (!m)
|
|
|
- continue;
|
|
|
- memcpy(m->addr, ha->addr, ETH_ALEN);
|
|
|
- m->hit = 1;
|
|
|
-
|
|
|
- m->next = vp->mcast_list;
|
|
|
- vp->mcast_list = m;
|
|
|
- }
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static void __send_mc_list(struct vnet *vp, struct vnet_port *port)
|
|
|
-{
|
|
|
- struct vio_net_mcast_info info;
|
|
|
- struct vnet_mcast_entry *m, **pp;
|
|
|
- int n_addrs;
|
|
|
-
|
|
|
- memset(&info, 0, sizeof(info));
|
|
|
-
|
|
|
- info.tag.type = VIO_TYPE_CTRL;
|
|
|
- info.tag.stype = VIO_SUBTYPE_INFO;
|
|
|
- info.tag.stype_env = VNET_MCAST_INFO;
|
|
|
- info.tag.sid = vio_send_sid(&port->vio);
|
|
|
- info.set = 1;
|
|
|
-
|
|
|
- n_addrs = 0;
|
|
|
- for (m = vp->mcast_list; m; m = m->next) {
|
|
|
- if (m->sent)
|
|
|
- continue;
|
|
|
- m->sent = 1;
|
|
|
- memcpy(&info.mcast_addr[n_addrs * ETH_ALEN],
|
|
|
- m->addr, ETH_ALEN);
|
|
|
- if (++n_addrs == VNET_NUM_MCAST) {
|
|
|
- info.count = n_addrs;
|
|
|
-
|
|
|
- (void) vio_ldc_send(&port->vio, &info,
|
|
|
- sizeof(info));
|
|
|
- n_addrs = 0;
|
|
|
- }
|
|
|
- }
|
|
|
- if (n_addrs) {
|
|
|
- info.count = n_addrs;
|
|
|
- (void) vio_ldc_send(&port->vio, &info, sizeof(info));
|
|
|
- }
|
|
|
-
|
|
|
- info.set = 0;
|
|
|
-
|
|
|
- n_addrs = 0;
|
|
|
- pp = &vp->mcast_list;
|
|
|
- while ((m = *pp) != NULL) {
|
|
|
- if (m->hit) {
|
|
|
- m->hit = 0;
|
|
|
- pp = &m->next;
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- memcpy(&info.mcast_addr[n_addrs * ETH_ALEN],
|
|
|
- m->addr, ETH_ALEN);
|
|
|
- if (++n_addrs == VNET_NUM_MCAST) {
|
|
|
- info.count = n_addrs;
|
|
|
- (void) vio_ldc_send(&port->vio, &info,
|
|
|
- sizeof(info));
|
|
|
- n_addrs = 0;
|
|
|
- }
|
|
|
-
|
|
|
- *pp = m->next;
|
|
|
- kfree(m);
|
|
|
- }
|
|
|
- if (n_addrs) {
|
|
|
- info.count = n_addrs;
|
|
|
- (void) vio_ldc_send(&port->vio, &info, sizeof(info));
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static void vnet_set_rx_mode(struct net_device *dev)
|
|
|
-{
|
|
|
- struct vnet *vp = netdev_priv(dev);
|
|
|
- struct vnet_port *port;
|
|
|
-
|
|
|
- rcu_read_lock();
|
|
|
- list_for_each_entry_rcu(port, &vp->port_list, list) {
|
|
|
-
|
|
|
- if (port->switch_port) {
|
|
|
- __update_mc_list(vp, dev);
|
|
|
- __send_mc_list(vp, port);
|
|
|
- break;
|
|
|
- }
|
|
|
- }
|
|
|
- rcu_read_unlock();
|
|
|
-}
|
|
|
-
|
|
|
-static int vnet_change_mtu(struct net_device *dev, int new_mtu)
|
|
|
-{
|
|
|
- if (new_mtu < 68 || new_mtu > 65535)
|
|
|
- return -EINVAL;
|
|
|
-
|
|
|
- dev->mtu = new_mtu;
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int vnet_set_mac_addr(struct net_device *dev, void *p)
|
|
|
-{
|
|
|
- return -EINVAL;
|
|
|
-}
|
|
|
-
|
|
|
static void vnet_get_drvinfo(struct net_device *dev,
|
|
|
struct ethtool_drvinfo *info)
|
|
|
{
|
|
|
@@ -1660,129 +81,21 @@ static const struct ethtool_ops vnet_ethtool_ops = {
|
|
|
.get_link = ethtool_op_get_link,
|
|
|
};
|
|
|
|
|
|
-static void vnet_port_free_tx_bufs(struct vnet_port *port)
|
|
|
-{
|
|
|
- struct vio_dring_state *dr;
|
|
|
- int i;
|
|
|
-
|
|
|
- dr = &port->vio.drings[VIO_DRIVER_TX_RING];
|
|
|
-
|
|
|
- if (dr->base == NULL)
|
|
|
- return;
|
|
|
-
|
|
|
- for (i = 0; i < VNET_TX_RING_SIZE; i++) {
|
|
|
- struct vio_net_desc *d;
|
|
|
- void *skb = port->tx_bufs[i].skb;
|
|
|
-
|
|
|
- if (!skb)
|
|
|
- continue;
|
|
|
-
|
|
|
- d = vio_dring_entry(dr, i);
|
|
|
-
|
|
|
- ldc_unmap(port->vio.lp,
|
|
|
- port->tx_bufs[i].cookies,
|
|
|
- port->tx_bufs[i].ncookies);
|
|
|
- dev_kfree_skb(skb);
|
|
|
- port->tx_bufs[i].skb = NULL;
|
|
|
- d->hdr.state = VIO_DESC_FREE;
|
|
|
- }
|
|
|
- ldc_free_exp_dring(port->vio.lp, dr->base,
|
|
|
- (dr->entry_size * dr->num_entries),
|
|
|
- dr->cookies, dr->ncookies);
|
|
|
- dr->base = NULL;
|
|
|
- dr->entry_size = 0;
|
|
|
- dr->num_entries = 0;
|
|
|
- dr->pending = 0;
|
|
|
- dr->ncookies = 0;
|
|
|
-}
|
|
|
-
|
|
|
-static void vnet_port_reset(struct vnet_port *port)
|
|
|
-{
|
|
|
- del_timer(&port->clean_timer);
|
|
|
- vnet_port_free_tx_bufs(port);
|
|
|
- port->rmtu = 0;
|
|
|
- port->tso = true;
|
|
|
- port->tsolen = 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int vnet_port_alloc_tx_ring(struct vnet_port *port)
|
|
|
-{
|
|
|
- struct vio_dring_state *dr;
|
|
|
- unsigned long len, elen;
|
|
|
- int i, err, ncookies;
|
|
|
- void *dring;
|
|
|
-
|
|
|
- dr = &port->vio.drings[VIO_DRIVER_TX_RING];
|
|
|
-
|
|
|
- elen = sizeof(struct vio_net_desc) +
|
|
|
- sizeof(struct ldc_trans_cookie) * 2;
|
|
|
- if (vio_version_after_eq(&port->vio, 1, 7))
|
|
|
- elen += sizeof(struct vio_net_dext);
|
|
|
- len = VNET_TX_RING_SIZE * elen;
|
|
|
-
|
|
|
- ncookies = VIO_MAX_RING_COOKIES;
|
|
|
- dring = ldc_alloc_exp_dring(port->vio.lp, len,
|
|
|
- dr->cookies, &ncookies,
|
|
|
- (LDC_MAP_SHADOW |
|
|
|
- LDC_MAP_DIRECT |
|
|
|
- LDC_MAP_RW));
|
|
|
- if (IS_ERR(dring)) {
|
|
|
- err = PTR_ERR(dring);
|
|
|
- goto err_out;
|
|
|
- }
|
|
|
-
|
|
|
- dr->base = dring;
|
|
|
- dr->entry_size = elen;
|
|
|
- dr->num_entries = VNET_TX_RING_SIZE;
|
|
|
- dr->prod = dr->cons = 0;
|
|
|
- port->start_cons = true; /* need an initial trigger */
|
|
|
- dr->pending = VNET_TX_RING_SIZE;
|
|
|
- dr->ncookies = ncookies;
|
|
|
-
|
|
|
- for (i = 0; i < VNET_TX_RING_SIZE; ++i) {
|
|
|
- struct vio_net_desc *d;
|
|
|
-
|
|
|
- d = vio_dring_entry(dr, i);
|
|
|
- d->hdr.state = VIO_DESC_FREE;
|
|
|
- }
|
|
|
- return 0;
|
|
|
-
|
|
|
-err_out:
|
|
|
- vnet_port_free_tx_bufs(port);
|
|
|
-
|
|
|
- return err;
|
|
|
-}
|
|
|
-
|
|
|
-#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
|
-static void vnet_poll_controller(struct net_device *dev)
|
|
|
-{
|
|
|
- struct vnet *vp = netdev_priv(dev);
|
|
|
- struct vnet_port *port;
|
|
|
- unsigned long flags;
|
|
|
-
|
|
|
- spin_lock_irqsave(&vp->lock, flags);
|
|
|
- if (!list_empty(&vp->port_list)) {
|
|
|
- port = list_entry(vp->port_list.next, struct vnet_port, list);
|
|
|
- napi_schedule(&port->napi);
|
|
|
- }
|
|
|
- spin_unlock_irqrestore(&vp->lock, flags);
|
|
|
-}
|
|
|
-#endif
|
|
|
static LIST_HEAD(vnet_list);
|
|
|
static DEFINE_MUTEX(vnet_list_mutex);
|
|
|
|
|
|
static const struct net_device_ops vnet_ops = {
|
|
|
- .ndo_open = vnet_open,
|
|
|
- .ndo_stop = vnet_close,
|
|
|
- .ndo_set_rx_mode = vnet_set_rx_mode,
|
|
|
- .ndo_set_mac_address = vnet_set_mac_addr,
|
|
|
+ .ndo_open = sunvnet_open_common,
|
|
|
+ .ndo_stop = sunvnet_close_common,
|
|
|
+ .ndo_set_rx_mode = sunvnet_set_rx_mode_common,
|
|
|
+ .ndo_set_mac_address = sunvnet_set_mac_addr_common,
|
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
|
- .ndo_tx_timeout = vnet_tx_timeout,
|
|
|
- .ndo_change_mtu = vnet_change_mtu,
|
|
|
- .ndo_start_xmit = vnet_start_xmit,
|
|
|
- .ndo_select_queue = vnet_select_queue,
|
|
|
+ .ndo_tx_timeout = sunvnet_tx_timeout_common,
|
|
|
+ .ndo_change_mtu = sunvnet_change_mtu_common,
|
|
|
+ .ndo_start_xmit = sunvnet_start_xmit_common,
|
|
|
+ .ndo_select_queue = sunvnet_select_queue_common,
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
|
- .ndo_poll_controller = vnet_poll_controller,
|
|
|
+ .ndo_poll_controller = sunvnet_poll_controller_common,
|
|
|
#endif
|
|
|
};
|
|
|
|
|
|
@@ -1908,15 +221,15 @@ static struct vnet *vnet_find_parent(struct mdesc_handle *hp,
|
|
|
}
|
|
|
|
|
|
static struct ldc_channel_config vnet_ldc_cfg = {
|
|
|
- .event = vnet_event,
|
|
|
+ .event = sunvnet_event_common,
|
|
|
.mtu = 64,
|
|
|
.mode = LDC_MODE_UNRELIABLE,
|
|
|
};
|
|
|
|
|
|
static struct vio_driver_ops vnet_vio_ops = {
|
|
|
- .send_attr = vnet_send_attr,
|
|
|
- .handle_attr = vnet_handle_attr,
|
|
|
- .handshake_complete = vnet_handshake_complete,
|
|
|
+ .send_attr = sunvnet_send_attr_common,
|
|
|
+ .handle_attr = sunvnet_handle_attr_common,
|
|
|
+ .handshake_complete = sunvnet_handshake_complete_common,
|
|
|
};
|
|
|
|
|
|
static void print_version(void)
|
|
|
@@ -1926,25 +239,6 @@ static void print_version(void)
|
|
|
|
|
|
const char *remote_macaddr_prop = "remote-mac-address";
|
|
|
|
|
|
-static void
|
|
|
-vnet_port_add_txq(struct vnet_port *port)
|
|
|
-{
|
|
|
- struct vnet *vp = port->vp;
|
|
|
- int n;
|
|
|
-
|
|
|
- n = vp->nports++;
|
|
|
- n = n & (VNET_MAX_TXQS - 1);
|
|
|
- port->q_index = n;
|
|
|
- netif_tx_wake_queue(netdev_get_tx_queue(vp->dev, port->q_index));
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-vnet_port_rm_txq(struct vnet_port *port)
|
|
|
-{
|
|
|
- port->vp->nports--;
|
|
|
- netif_tx_stop_queue(netdev_get_tx_queue(port->vp->dev, port->q_index));
|
|
|
-}
|
|
|
-
|
|
|
static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
|
|
|
{
|
|
|
struct mdesc_handle *hp;
|
|
|
@@ -1992,7 +286,8 @@ static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
|
|
|
if (err)
|
|
|
goto err_out_free_port;
|
|
|
|
|
|
- netif_napi_add(port->vp->dev, &port->napi, vnet_poll, NAPI_POLL_WEIGHT);
|
|
|
+ netif_napi_add(port->vp->dev, &port->napi, sunvnet_poll_common,
|
|
|
+ NAPI_POLL_WEIGHT);
|
|
|
|
|
|
INIT_HLIST_NODE(&port->hash);
|
|
|
INIT_LIST_HEAD(&port->list);
|
|
|
@@ -2011,7 +306,7 @@ static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
|
|
|
list_add_tail_rcu(&port->list, &vp->port_list);
|
|
|
hlist_add_head_rcu(&port->hash,
|
|
|
&vp->port_hash[vnet_hashfn(port->raddr)]);
|
|
|
- vnet_port_add_txq(port);
|
|
|
+ sunvnet_port_add_txq_common(port);
|
|
|
spin_unlock_irqrestore(&vp->lock, flags);
|
|
|
|
|
|
dev_set_drvdata(&vdev->dev, port);
|
|
|
@@ -2019,7 +314,7 @@ static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
|
|
|
pr_info("%s: PORT ( remote-mac %pM%s )\n",
|
|
|
vp->dev->name, port->raddr, switch_port ? " switch-port" : "");
|
|
|
|
|
|
- setup_timer(&port->clean_timer, vnet_clean_timer_expire,
|
|
|
+ setup_timer(&port->clean_timer, sunvnet_clean_timer_expire_common,
|
|
|
(unsigned long)port);
|
|
|
|
|
|
napi_enable(&port->napi);
|
|
|
@@ -2052,9 +347,9 @@ static int vnet_port_remove(struct vio_dev *vdev)
|
|
|
|
|
|
synchronize_rcu();
|
|
|
del_timer_sync(&port->clean_timer);
|
|
|
- vnet_port_rm_txq(port);
|
|
|
+ sunvnet_port_rm_txq_common(port);
|
|
|
netif_napi_del(&port->napi);
|
|
|
- vnet_port_free_tx_bufs(port);
|
|
|
+ sunvnet_port_free_tx_bufs_common(port);
|
|
|
vio_ldc_free(&port->vio);
|
|
|
|
|
|
dev_set_drvdata(&vdev->dev, NULL);
|
Aaron Young