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authorJeff Kirsher <jeffrey.t.kirsher@intel.com>2011-05-12 23:04:46 -0700
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2011-08-11 02:33:43 -0700
commite689cf4a042772f727450035b102579b0c01bdc7 (patch)
treef2b17aa21b8358a8f7589fed46fa08688b439464 /drivers/net/sunvnet.c
parent8efc91254fda97ee78e2e0b8e016120e664131de (diff)
cassini/niu/sun*: Move the Sun drivers
Moves the Sun drivers into drivers/net/ethernet/sun/ and make the necessary Kconfig and Makefile changes. Oliver Hartkopp <socketcan@hartkopp.net> suggested removing the sun* prefix on the driver names. This type of change I will leave up to the driver maintainers. CC: Sam Creasey <sammy@sammy.net> CC: Adrian Sun <asun@darksunrising.com> CC: Benjamin Herrenscmidt <benh@kernel.crashing.org> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/sunvnet.c')
-rw-r--r--drivers/net/sunvnet.c1284
1 files changed, 0 insertions, 1284 deletions
diff --git a/drivers/net/sunvnet.c b/drivers/net/sunvnet.c
deleted file mode 100644
index bf3c762de620..000000000000
--- a/drivers/net/sunvnet.c
+++ /dev/null
@@ -1,1284 +0,0 @@
-/* sunvnet.c: Sun LDOM Virtual Network Driver.
- *
- * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/netdevice.h>
-#include <linux/ethtool.h>
-#include <linux/etherdevice.h>
-#include <linux/mutex.h>
-
-#include <asm/vio.h>
-#include <asm/ldc.h>
-
-#include "sunvnet.h"
-
-#define DRV_MODULE_NAME "sunvnet"
-#define DRV_MODULE_VERSION "1.0"
-#define DRV_MODULE_RELDATE "June 25, 2007"
-
-static char version[] __devinitdata =
- DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
-MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
-MODULE_DESCRIPTION("Sun LDOM virtual network driver");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(DRV_MODULE_VERSION);
-
-/* Ordered from largest major to lowest */
-static struct vio_version vnet_versions[] = {
- { .major = 1, .minor = 0 },
-};
-
-static inline u32 vnet_tx_dring_avail(struct vio_dring_state *dr)
-{
- return vio_dring_avail(dr, VNET_TX_RING_SIZE);
-}
-
-static int vnet_handle_unknown(struct vnet_port *port, void *arg)
-{
- struct vio_msg_tag *pkt = arg;
-
- pr_err("Received unknown msg [%02x:%02x:%04x:%08x]\n",
- pkt->type, pkt->stype, pkt->stype_env, pkt->sid);
- pr_err("Resetting connection\n");
-
- ldc_disconnect(port->vio.lp);
-
- return -ECONNRESET;
-}
-
-static int vnet_send_attr(struct vio_driver_state *vio)
-{
- struct vnet_port *port = to_vnet_port(vio);
- struct net_device *dev = port->vp->dev;
- struct vio_net_attr_info pkt;
- int i;
-
- memset(&pkt, 0, sizeof(pkt));
- pkt.tag.type = VIO_TYPE_CTRL;
- pkt.tag.stype = VIO_SUBTYPE_INFO;
- pkt.tag.stype_env = VIO_ATTR_INFO;
- pkt.tag.sid = vio_send_sid(vio);
- pkt.xfer_mode = VIO_DRING_MODE;
- pkt.addr_type = VNET_ADDR_ETHERMAC;
- pkt.ack_freq = 0;
- for (i = 0; i < 6; i++)
- pkt.addr |= (u64)dev->dev_addr[i] << ((5 - i) * 8);
- pkt.mtu = ETH_FRAME_LEN;
-
- viodbg(HS, "SEND NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] "
- "ackfreq[%u] mtu[%llu]\n",
- pkt.xfer_mode, pkt.addr_type,
- (unsigned long long) pkt.addr,
- pkt.ack_freq,
- (unsigned long long) pkt.mtu);
-
- return vio_ldc_send(vio, &pkt, sizeof(pkt));
-}
-
-static int handle_attr_info(struct vio_driver_state *vio,
- struct vio_net_attr_info *pkt)
-{
- viodbg(HS, "GOT NET ATTR INFO xmode[0x%x] atype[0x%x] addr[%llx] "
- "ackfreq[%u] mtu[%llu]\n",
- pkt->xfer_mode, pkt->addr_type,
- (unsigned long long) pkt->addr,
- pkt->ack_freq,
- (unsigned long long) pkt->mtu);
-
- pkt->tag.sid = vio_send_sid(vio);
-
- if (pkt->xfer_mode != VIO_DRING_MODE ||
- pkt->addr_type != VNET_ADDR_ETHERMAC ||
- pkt->mtu != ETH_FRAME_LEN) {
- viodbg(HS, "SEND NET ATTR NACK\n");
-
- pkt->tag.stype = VIO_SUBTYPE_NACK;
-
- (void) vio_ldc_send(vio, pkt, sizeof(*pkt));
-
- return -ECONNRESET;
- } else {
- viodbg(HS, "SEND NET ATTR ACK\n");
-
- pkt->tag.stype = VIO_SUBTYPE_ACK;
-
- return vio_ldc_send(vio, pkt, sizeof(*pkt));
- }
-
-}
-
-static int handle_attr_ack(struct vio_driver_state *vio,
- struct vio_net_attr_info *pkt)
-{
- viodbg(HS, "GOT NET ATTR ACK\n");
-
- return 0;
-}
-
-static int handle_attr_nack(struct vio_driver_state *vio,
- struct vio_net_attr_info *pkt)
-{
- viodbg(HS, "GOT NET ATTR NACK\n");
-
- return -ECONNRESET;
-}
-
-static int vnet_handle_attr(struct vio_driver_state *vio, void *arg)
-{
- struct vio_net_attr_info *pkt = arg;
-
- switch (pkt->tag.stype) {
- case VIO_SUBTYPE_INFO:
- return handle_attr_info(vio, pkt);
-
- case VIO_SUBTYPE_ACK:
- return handle_attr_ack(vio, pkt);
-
- case VIO_SUBTYPE_NACK:
- return handle_attr_nack(vio, pkt);
-
- default:
- return -ECONNRESET;
- }
-}
-
-static void vnet_handshake_complete(struct vio_driver_state *vio)
-{
- struct vio_dring_state *dr;
-
- dr = &vio->drings[VIO_DRIVER_RX_RING];
- dr->snd_nxt = dr->rcv_nxt = 1;
-
- dr = &vio->drings[VIO_DRIVER_TX_RING];
- dr->snd_nxt = dr->rcv_nxt = 1;
-}
-
-/* The hypervisor interface that implements copying to/from imported
- * memory from another domain requires that copies are done to 8-byte
- * aligned buffers, and that the lengths of such copies are also 8-byte
- * multiples.
- *
- * So we align skb->data to an 8-byte multiple and pad-out the data
- * area so we can round the copy length up to the next multiple of
- * 8 for the copy.
- *
- * The transmitter puts the actual start of the packet 6 bytes into
- * the buffer it sends over, so that the IP headers after the ethernet
- * header are aligned properly. These 6 bytes are not in the descriptor
- * length, they are simply implied. This offset is represented using
- * the VNET_PACKET_SKIP macro.
- */
-static struct sk_buff *alloc_and_align_skb(struct net_device *dev,
- unsigned int len)
-{
- struct sk_buff *skb = netdev_alloc_skb(dev, len+VNET_PACKET_SKIP+8+8);
- unsigned long addr, off;
-
- if (unlikely(!skb))
- return NULL;
-
- addr = (unsigned long) skb->data;
- off = ((addr + 7UL) & ~7UL) - addr;
- if (off)
- skb_reserve(skb, off);
-
- return skb;
-}
-
-static int vnet_rx_one(struct vnet_port *port, unsigned int len,
- struct ldc_trans_cookie *cookies, int ncookies)
-{
- struct net_device *dev = port->vp->dev;
- unsigned int copy_len;
- struct sk_buff *skb;
- int err;
-
- err = -EMSGSIZE;
- if (unlikely(len < ETH_ZLEN || len > ETH_FRAME_LEN)) {
- dev->stats.rx_length_errors++;
- goto out_dropped;
- }
-
- skb = alloc_and_align_skb(dev, len);
- err = -ENOMEM;
- if (unlikely(!skb)) {
- dev->stats.rx_missed_errors++;
- goto out_dropped;
- }
-
- copy_len = (len + VNET_PACKET_SKIP + 7U) & ~7U;
- skb_put(skb, copy_len);
- err = ldc_copy(port->vio.lp, LDC_COPY_IN,
- skb->data, copy_len, 0,
- cookies, ncookies);
- if (unlikely(err < 0)) {
- dev->stats.rx_frame_errors++;
- goto out_free_skb;
- }
-
- skb_pull(skb, VNET_PACKET_SKIP);
- skb_trim(skb, len);
- skb->protocol = eth_type_trans(skb, dev);
-
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += len;
-
- netif_rx(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;
-
- 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;
- } while (err == -EAGAIN);
-
- return err;
-}
-
-static u32 next_idx(u32 idx, struct vio_dring_state *dr)
-{
- if (++idx == dr->num_entries)
- idx = 0;
- return idx;
-}
-
-static u32 prev_idx(u32 idx, struct vio_dring_state *dr)
-{
- if (idx == 0)
- idx = dr->num_entries - 1;
- else
- idx--;
-
- return idx;
-}
-
-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;
-
- if (IS_ERR(desc))
- return PTR_ERR(desc);
-
- 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);
-
- if (desc->hdr.state != VIO_DESC_READY)
- return 1;
- err = vnet_rx_one(port, desc->size, desc->cookies, desc->ncookies);
- if (err == -ECONNRESET)
- return err;
- 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)
-{
- struct vio_driver_state *vio = &port->vio;
- int ack_start = -1, ack_end = -1;
-
- end = (end == (u32) -1) ? prev_idx(start, dr) : next_idx(end, dr);
-
- 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;
- if (ack_start == -1)
- ack_start = start;
- ack_end = start;
- start = next_idx(start, dr);
- 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 (unlikely(ack_start == -1))
- ack_start = ack_end = prev_idx(start, dr);
- return vnet_send_ack(port, dr, ack_start, ack_end, VIO_DRING_STOPPED);
-}
-
-static int vnet_rx(struct vnet_port *port, void *msgbuf)
-{
- 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;
- }
-
- 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);
-}
-
-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 = next_idx(idx, dr);
- }
- 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;
-
- if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA))
- return 0;
-
- end = pkt->end_idx;
- if (unlikely(!idx_is_pending(dr, end)))
- return 0;
-
- dr->cons = next_idx(end, dr);
-
- vp = port->vp;
- dev = vp->dev;
- if (unlikely(netif_queue_stopped(dev) &&
- 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;
-}
-
-static void maybe_tx_wakeup(struct vnet *vp)
-{
- struct net_device *dev = vp->dev;
-
- netif_tx_lock(dev);
- if (likely(netif_queue_stopped(dev))) {
- struct vnet_port *port;
- int wake = 1;
-
- list_for_each_entry(port, &vp->port_list, list) {
- struct vio_dring_state *dr;
-
- dr = &port->vio.drings[VIO_DRIVER_TX_RING];
- if (vnet_tx_dring_avail(dr) <
- VNET_TX_WAKEUP_THRESH(dr)) {
- wake = 0;
- break;
- }
- }
- if (wake)
- netif_wake_queue(dev);
- }
- netif_tx_unlock(dev);
-}
-
-static void vnet_event(void *arg, int event)
-{
- struct vnet_port *port = arg;
- struct vio_driver_state *vio = &port->vio;
- unsigned long flags;
- int tx_wakeup, err;
-
- spin_lock_irqsave(&vio->lock, flags);
-
- if (unlikely(event == LDC_EVENT_RESET ||
- event == LDC_EVENT_UP)) {
- vio_link_state_change(vio, event);
- spin_unlock_irqrestore(&vio->lock, flags);
-
- if (event == LDC_EVENT_RESET)
- vio_port_up(vio);
- return;
- }
-
- if (unlikely(event != LDC_EVENT_DATA_READY)) {
- pr_warning("Unexpected LDC event %d\n", event);
- spin_unlock_irqrestore(&vio->lock, flags);
- return;
- }
-
- tx_wakeup = err = 0;
- while (1) {
- union {
- struct vio_msg_tag tag;
- u64 raw[8];
- } msgbuf;
-
- 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;
-
- if (likely(msgbuf.tag.type == VIO_TYPE_DATA)) {
- if (msgbuf.tag.stype == VIO_SUBTYPE_INFO) {
- err = vnet_rx(port, &msgbuf);
- } 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;
- }
- spin_unlock(&vio->lock);
- if (unlikely(tx_wakeup && err != -ECONNRESET))
- maybe_tx_wakeup(port->vp);
- local_irq_restore(flags);
-}
-
-static int __vnet_tx_trigger(struct vnet_port *port)
-{
- 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 = dr->prod,
- .end_idx = (u32) -1,
- };
- int err, delay;
-
- 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;
- } while (err == -EAGAIN);
-
- 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 hlist_node *n;
- struct vnet_port *port;
-
- hlist_for_each_entry(port, n, hp, hash) {
- if (!compare_ether_addr(port->raddr, skb->data))
- return port;
- }
- port = NULL;
- if (!list_empty(&vp->port_list))
- port = list_entry(vp->port_list.next, struct vnet_port, list);
-
- return port;
-}
-
-struct vnet_port *tx_port_find(struct vnet *vp, struct sk_buff *skb)
-{
- struct vnet_port *ret;
- unsigned long flags;
-
- spin_lock_irqsave(&vp->lock, flags);
- ret = __tx_port_find(vp, skb);
- spin_unlock_irqrestore(&vp->lock, flags);
-
- return ret;
-}
-
-static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- struct vnet *vp = netdev_priv(dev);
- struct vnet_port *port = tx_port_find(vp, skb);
- struct vio_dring_state *dr;
- struct vio_net_desc *d;
- unsigned long flags;
- unsigned int len;
- void *tx_buf;
- int i, err;
-
- if (unlikely(!port))
- goto out_dropped;
-
- spin_lock_irqsave(&port->vio.lock, flags);
-
- dr = &port->vio.drings[VIO_DRIVER_TX_RING];
- if (unlikely(vnet_tx_dring_avail(dr) < 2)) {
- if (!netif_queue_stopped(dev)) {
- netif_stop_queue(dev);
-
- /* This is a hard error, log it. */
- netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
- dev->stats.tx_errors++;
- }
- spin_unlock_irqrestore(&port->vio.lock, flags);
- return NETDEV_TX_BUSY;
- }
-
- d = vio_dring_cur(dr);
-
- tx_buf = port->tx_bufs[dr->prod].buf;
- skb_copy_from_linear_data(skb, tx_buf + VNET_PACKET_SKIP, skb->len);
-
- len = skb->len;
- if (len < ETH_ZLEN) {
- len = ETH_ZLEN;
- memset(tx_buf+VNET_PACKET_SKIP+skb->len, 0, len - skb->len);
- }
-
- d->hdr.ack = VIO_ACK_ENABLE;
- d->size = len;
- d->ncookies = port->tx_bufs[dr->prod].ncookies;
- for (i = 0; i < d->ncookies; i++)
- d->cookies[i] = port->tx_bufs[dr->prod].cookies[i];
-
- /* This has to be a non-SMP write barrier because we are writing
- * to memory which is shared with the peer LDOM.
- */
- wmb();
-
- d->hdr.state = VIO_DESC_READY;
-
- err = __vnet_tx_trigger(port);
- if (unlikely(err < 0)) {
- netdev_info(dev, "TX trigger error %d\n", err);
- d->hdr.state = VIO_DESC_FREE;
- dev->stats.tx_carrier_errors++;
- goto out_dropped_unlock;
- }
-
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += skb->len;
-
- dr->prod = (dr->prod + 1) & (VNET_TX_RING_SIZE - 1);
- if (unlikely(vnet_tx_dring_avail(dr) < 2)) {
- netif_stop_queue(dev);
- if (vnet_tx_dring_avail(dr) > VNET_TX_WAKEUP_THRESH(dr))
- netif_wake_queue(dev);
- }
-
- spin_unlock_irqrestore(&port->vio.lock, flags);
-
- dev_kfree_skb(skb);
-
- return NETDEV_TX_OK;
-
-out_dropped_unlock:
- spin_unlock_irqrestore(&port->vio.lock, flags);
-
-out_dropped:
- dev_kfree_skb(skb);
- 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_start_queue(dev);
-
- return 0;
-}
-
-static int vnet_close(struct net_device *dev)
-{
- netif_stop_queue(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 (!memcmp(m->addr, addr, ETH_ALEN))
- 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;
- 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);
-
- if (port->switch_port) {
- __update_mc_list(vp, dev);
- __send_mc_list(vp, port);
- }
- }
- spin_unlock_irqrestore(&vp->lock, flags);
-}
-
-static int vnet_change_mtu(struct net_device *dev, int new_mtu)
-{
- if (new_mtu != ETH_DATA_LEN)
- 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)
-{
- strcpy(info->driver, DRV_MODULE_NAME);
- strcpy(info->version, DRV_MODULE_VERSION);
-}
-
-static u32 vnet_get_msglevel(struct net_device *dev)
-{
- struct vnet *vp = netdev_priv(dev);
- return vp->msg_enable;
-}
-
-static void vnet_set_msglevel(struct net_device *dev, u32 value)
-{
- struct vnet *vp = netdev_priv(dev);
- vp->msg_enable = value;
-}
-
-static const struct ethtool_ops vnet_ethtool_ops = {
- .get_drvinfo = vnet_get_drvinfo,
- .get_msglevel = vnet_get_msglevel,
- .set_msglevel = vnet_set_msglevel,
- .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) {
- 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;
- }
-
- for (i = 0; i < VNET_TX_RING_SIZE; i++) {
- void *buf = port->tx_bufs[i].buf;
-
- if (!buf)
- continue;
-
- ldc_unmap(port->vio.lp,
- port->tx_bufs[i].cookies,
- port->tx_bufs[i].ncookies);
-
- kfree(buf);
- port->tx_bufs[i].buf = NULL;
- }
-}
-
-static int __devinit vnet_port_alloc_tx_bufs(struct vnet_port *port)
-{
- struct vio_dring_state *dr;
- unsigned long len;
- int i, err, ncookies;
- void *dring;
-
- for (i = 0; i < VNET_TX_RING_SIZE; i++) {
- void *buf = kzalloc(ETH_FRAME_LEN + 8, GFP_KERNEL);
- int map_len = (ETH_FRAME_LEN + 7) & ~7;
-
- err = -ENOMEM;
- if (!buf) {
- pr_err("TX buffer allocation failure\n");
- goto err_out;
- }
- err = -EFAULT;
- if ((unsigned long)buf & (8UL - 1)) {
- pr_err("TX buffer misaligned\n");
- kfree(buf);
- goto err_out;
- }
-
- err = ldc_map_single(port->vio.lp, buf, map_len,
- port->tx_bufs[i].cookies, 2,
- (LDC_MAP_SHADOW |
- LDC_MAP_DIRECT |
- LDC_MAP_RW));
- if (err < 0) {
- kfree(buf);
- goto err_out;
- }
- port->tx_bufs[i].buf = buf;
- port->tx_bufs[i].ncookies = err;
- }
-
- dr = &port->vio.drings[VIO_DRIVER_TX_RING];
-
- len = (VNET_TX_RING_SIZE *
- (sizeof(struct vio_net_desc) +
- (sizeof(struct ldc_trans_cookie) * 2)));
-
- 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 = (sizeof(struct vio_net_desc) +
- (sizeof(struct ldc_trans_cookie) * 2));
- dr->num_entries = VNET_TX_RING_SIZE;
- dr->prod = dr->cons = 0;
- dr->pending = VNET_TX_RING_SIZE;
- dr->ncookies = ncookies;
-
- return 0;
-
-err_out:
- vnet_port_free_tx_bufs(port);
-
- return err;
-}
-
-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_multicast_list = vnet_set_rx_mode,
- .ndo_set_mac_address = vnet_set_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
- .ndo_tx_timeout = vnet_tx_timeout,
- .ndo_change_mtu = vnet_change_mtu,
- .ndo_start_xmit = vnet_start_xmit,
-};
-
-static struct vnet * __devinit vnet_new(const u64 *local_mac)
-{
- struct net_device *dev;
- struct vnet *vp;
- int err, i;
-
- dev = alloc_etherdev(sizeof(*vp));
- if (!dev) {
- pr_err("Etherdev alloc failed, aborting\n");
- return ERR_PTR(-ENOMEM);
- }
-
- for (i = 0; i < ETH_ALEN; i++)
- dev->dev_addr[i] = (*local_mac >> (5 - i) * 8) & 0xff;
-
- memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
-
- vp = netdev_priv(dev);
-
- spin_lock_init(&vp->lock);
- vp->dev = dev;
-
- INIT_LIST_HEAD(&vp->port_list);
- for (i = 0; i < VNET_PORT_HASH_SIZE; i++)
- INIT_HLIST_HEAD(&vp->port_hash[i]);
- INIT_LIST_HEAD(&vp->list);
- vp->local_mac = *local_mac;
-
- dev->netdev_ops = &vnet_ops;
- dev->ethtool_ops = &vnet_ethtool_ops;
- dev->watchdog_timeo = VNET_TX_TIMEOUT;
-
- err = register_netdev(dev);
- if (err) {
- pr_err("Cannot register net device, aborting\n");
- goto err_out_free_dev;
- }
-
- netdev_info(dev, "Sun LDOM vnet %pM\n", dev->dev_addr);
-
- list_add(&vp->list, &vnet_list);
-
- return vp;
-
-err_out_free_dev:
- free_netdev(dev);
-
- return ERR_PTR(err);
-}
-
-static struct vnet * __devinit vnet_find_or_create(const u64 *local_mac)
-{
- struct vnet *iter, *vp;
-
- mutex_lock(&vnet_list_mutex);
- vp = NULL;
- list_for_each_entry(iter, &vnet_list, list) {
- if (iter->local_mac == *local_mac) {
- vp = iter;
- break;
- }
- }
- if (!vp)
- vp = vnet_new(local_mac);
- mutex_unlock(&vnet_list_mutex);
-
- return vp;
-}
-
-static const char *local_mac_prop = "local-mac-address";
-
-static struct vnet * __devinit vnet_find_parent(struct mdesc_handle *hp,
- u64 port_node)
-{
- const u64 *local_mac = NULL;
- u64 a;
-
- mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) {
- u64 target = mdesc_arc_target(hp, a);
- const char *name;
-
- name = mdesc_get_property(hp, target, "name", NULL);
- if (!name || strcmp(name, "network"))
- continue;
-
- local_mac = mdesc_get_property(hp, target,
- local_mac_prop, NULL);
- if (local_mac)
- break;
- }
- if (!local_mac)
- return ERR_PTR(-ENODEV);
-
- return vnet_find_or_create(local_mac);
-}
-
-static struct ldc_channel_config vnet_ldc_cfg = {
- .event = vnet_event,
- .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,
-};
-
-static void __devinit print_version(void)
-{
- printk_once(KERN_INFO "%s", version);
-}
-
-const char *remote_macaddr_prop = "remote-mac-address";
-
-static int __devinit vnet_port_probe(struct vio_dev *vdev,
- const struct vio_device_id *id)
-{
- struct mdesc_handle *hp;
- struct vnet_port *port;
- unsigned long flags;
- struct vnet *vp;
- const u64 *rmac;
- int len, i, err, switch_port;
-
- print_version();
-
- hp = mdesc_grab();
-
- vp = vnet_find_parent(hp, vdev->mp);
- if (IS_ERR(vp)) {
- pr_err("Cannot find port parent vnet\n");
- err = PTR_ERR(vp);
- goto err_out_put_mdesc;
- }
-
- rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
- err = -ENODEV;
- if (!rmac) {
- pr_err("Port lacks %s property\n", remote_macaddr_prop);
- goto err_out_put_mdesc;
- }
-
- port = kzalloc(sizeof(*port), GFP_KERNEL);
- err = -ENOMEM;
- if (!port) {
- pr_err("Cannot allocate vnet_port\n");
- goto err_out_put_mdesc;
- }
-
- for (i = 0; i < ETH_ALEN; i++)
- port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff;
-
- port->vp = vp;
-
- err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
- vnet_versions, ARRAY_SIZE(vnet_versions),
- &vnet_vio_ops, vp->dev->name);
- if (err)
- goto err_out_free_port;
-
- err = vio_ldc_alloc(&port->vio, &vnet_ldc_cfg, port);
- if (err)
- goto err_out_free_port;
-
- err = vnet_port_alloc_tx_bufs(port);
- if (err)
- goto err_out_free_ldc;
-
- INIT_HLIST_NODE(&port->hash);
- INIT_LIST_HEAD(&port->list);
-
- switch_port = 0;
- if (mdesc_get_property(hp, vdev->mp, "switch-port", NULL) != NULL)
- switch_port = 1;
- port->switch_port = switch_port;
-
- spin_lock_irqsave(&vp->lock, flags);
- if (switch_port)
- list_add(&port->list, &vp->port_list);
- else
- list_add_tail(&port->list, &vp->port_list);
- hlist_add_head(&port->hash, &vp->port_hash[vnet_hashfn(port->raddr)]);
- spin_unlock_irqrestore(&vp->lock, flags);
-
- dev_set_drvdata(&vdev->dev, port);
-
- pr_info("%s: PORT ( remote-mac %pM%s )\n",
- vp->dev->name, port->raddr, switch_port ? " switch-port" : "");
-
- vio_port_up(&port->vio);
-
- mdesc_release(hp);
-
- return 0;
-
-err_out_free_ldc:
- vio_ldc_free(&port->vio);
-
-err_out_free_port:
- kfree(port);
-
-err_out_put_mdesc:
- mdesc_release(hp);
- return err;
-}
-
-static int vnet_port_remove(struct vio_dev *vdev)
-{
- struct vnet_port *port = dev_get_drvdata(&vdev->dev);
-
- if (port) {
- struct vnet *vp = port->vp;
- unsigned long flags;
-
- del_timer_sync(&port->vio.timer);
-
- spin_lock_irqsave(&vp->lock, flags);
- list_del(&port->list);
- hlist_del(&port->hash);
- spin_unlock_irqrestore(&vp->lock, flags);
-
- vnet_port_free_tx_bufs(port);
- vio_ldc_free(&port->vio);
-
- dev_set_drvdata(&vdev->dev, NULL);
-
- kfree(port);
- }
- return 0;
-}
-
-static const struct vio_device_id vnet_port_match[] = {
- {
- .type = "vnet-port",
- },
- {},
-};
-MODULE_DEVICE_TABLE(vio, vnet_port_match);
-
-static struct vio_driver vnet_port_driver = {
- .id_table = vnet_port_match,
- .probe = vnet_port_probe,
- .remove = vnet_port_remove,
- .driver = {
- .name = "vnet_port",
- .owner = THIS_MODULE,
- }
-};
-
-static int __init vnet_init(void)
-{
- return vio_register_driver(&vnet_port_driver);
-}
-
-static void __exit vnet_exit(void)
-{
- vio_unregister_driver(&vnet_port_driver);
-}
-
-module_init(vnet_init);
-module_exit(vnet_exit);