diff options
| -rw-r--r-- | drivers/misc/sgi-xp/xpnet.c | 213 |
1 files changed, 94 insertions, 119 deletions
diff --git a/drivers/misc/sgi-xp/xpnet.c b/drivers/misc/sgi-xp/xpnet.c index f9356ba7315..c5f59a6dae5 100644 --- a/drivers/misc/sgi-xp/xpnet.c +++ b/drivers/misc/sgi-xp/xpnet.c @@ -21,7 +21,6 @@ */ #include <linux/module.h> -#include <linux/types.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/ioport.h> @@ -32,8 +31,6 @@ #include <linux/mii.h> #include <linux/smp.h> #include <linux/string.h> -#include <asm/sn/io.h> -#include <asm/sn/sn_sal.h> #include <asm/atomic.h> #include "xp.h" @@ -104,7 +101,6 @@ struct xpnet_message { * then be released. */ struct xpnet_pending_msg { - struct list_head free_list; struct sk_buff *skb; atomic_t use_count; }; @@ -120,7 +116,7 @@ struct net_device *xpnet_device; * When we are notified of other partitions activating, we add them to * our bitmask of partitions to which we broadcast. */ -static u64 xpnet_broadcast_partitions; +static unsigned long *xpnet_broadcast_partitions; /* protect above */ static DEFINE_SPINLOCK(xpnet_broadcast_lock); @@ -140,16 +136,13 @@ static DEFINE_SPINLOCK(xpnet_broadcast_lock); #define XPNET_DEF_MTU (0x8000UL) /* - * The partition id is encapsulated in the MAC address. The following - * define locates the octet the partid is in. + * The partid is encapsulated in the MAC address beginning in the following + * octet and it consists of two octets. */ -#define XPNET_PARTID_OCTET 1 -#define XPNET_LICENSE_OCTET 2 +#define XPNET_PARTID_OCTET 2 + +/* Define the XPNET debug device structures to be used with dev_dbg() et al */ -/* - * Define the XPNET debug device structure that is to be used with dev_dbg(), - * dev_err(), dev_warn(), and dev_info(). - */ struct device_driver xpnet_dbg_name = { .name = "xpnet" }; @@ -231,7 +224,7 @@ xpnet_receive(short partid, int channel, struct xpnet_message *msg) (void *)msg->buf_pa, msg->size); ret = xp_remote_memcpy((void *)((u64)skb->data & - ~(L1_CACHE_BYTES - 1)), + ~(L1_CACHE_BYTES - 1)), (void *)msg->buf_pa, msg->size); if (ret != xpSuccess) { @@ -283,8 +276,6 @@ static void xpnet_connection_activity(enum xp_retval reason, short partid, int channel, void *data, void *key) { - long bp; - DBUG_ON(partid < 0 || partid >= xp_max_npartitions); DBUG_ON(channel != XPC_NET_CHANNEL); @@ -297,31 +288,28 @@ xpnet_connection_activity(enum xp_retval reason, short partid, int channel, case xpConnected: /* connection completed to a partition */ spin_lock_bh(&xpnet_broadcast_lock); - xpnet_broadcast_partitions |= 1UL << (partid - 1); - bp = xpnet_broadcast_partitions; + __set_bit(partid, xpnet_broadcast_partitions); spin_unlock_bh(&xpnet_broadcast_lock); netif_carrier_on(xpnet_device); - dev_dbg(xpnet, "%s connection created to partition %d; " - "xpnet_broadcast_partitions=0x%lx\n", - xpnet_device->name, partid, bp); + dev_dbg(xpnet, "%s connected to partition %d\n", + xpnet_device->name, partid); break; default: spin_lock_bh(&xpnet_broadcast_lock); - xpnet_broadcast_partitions &= ~(1UL << (partid - 1)); - bp = xpnet_broadcast_partitions; + __clear_bit(partid, xpnet_broadcast_partitions); spin_unlock_bh(&xpnet_broadcast_lock); - if (bp == 0) + if (bitmap_empty((unsigned long *)xpnet_broadcast_partitions, + xp_max_npartitions)) { netif_carrier_off(xpnet_device); + } - dev_dbg(xpnet, "%s disconnected from partition %d; " - "xpnet_broadcast_partitions=0x%lx\n", - xpnet_device->name, partid, bp); + dev_dbg(xpnet, "%s disconnected from partition %d\n", + xpnet_device->name, partid); break; - } } @@ -424,36 +412,72 @@ xpnet_send_completed(enum xp_retval reason, short partid, int channel, } } +static void +xpnet_send(struct sk_buff *skb, struct xpnet_pending_msg *queued_msg, + u64 start_addr, u64 end_addr, u16 embedded_bytes, int dest_partid) +{ + u8 msg_buffer[XPNET_MSG_SIZE]; + struct xpnet_message *msg = (struct xpnet_message *)&msg_buffer; + enum xp_retval ret; + + msg->embedded_bytes = embedded_bytes; + if (unlikely(embedded_bytes != 0)) { + msg->version = XPNET_VERSION_EMBED; + dev_dbg(xpnet, "calling memcpy(0x%p, 0x%p, 0x%lx)\n", + &msg->data, skb->data, (size_t)embedded_bytes); + skb_copy_from_linear_data(skb, &msg->data, + (size_t)embedded_bytes); + } else { + msg->version = XPNET_VERSION; + } + msg->magic = XPNET_MAGIC; + msg->size = end_addr - start_addr; + msg->leadin_ignore = (u64)skb->data - start_addr; + msg->tailout_ignore = end_addr - (u64)skb_tail_pointer(skb); + msg->buf_pa = __pa(start_addr); + + dev_dbg(xpnet, "sending XPC message to %d:%d\n" + KERN_DEBUG "msg->buf_pa=0x%lx, msg->size=%u, " + "msg->leadin_ignore=%u, msg->tailout_ignore=%u\n", + dest_partid, XPC_NET_CHANNEL, msg->buf_pa, msg->size, + msg->leadin_ignore, msg->tailout_ignore); + + atomic_inc(&queued_msg->use_count); + + ret = xpc_send_notify(dest_partid, XPC_NET_CHANNEL, XPC_NOWAIT, msg, + XPNET_MSG_SIZE, xpnet_send_completed, queued_msg); + if (unlikely(ret != xpSuccess)) + atomic_dec(&queued_msg->use_count); +} + /* * Network layer has formatted a packet (skb) and is ready to place it * "on the wire". Prepare and send an xpnet_message to all partitions * which have connected with us and are targets of this packet. * * MAC-NOTE: For the XPNET driver, the MAC address contains the - * destination partition_id. If the destination partition id word - * is 0xff, this packet is to broadcast to all partitions. + * destination partid. If the destination partid octets are 0xffff, + * this packet is to be broadcast to all connected partitions. */ static int xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct xpnet_pending_msg *queued_msg; - enum xp_retval ret; - u8 msg_buffer[XPNET_MSG_SIZE]; - struct xpnet_message *msg = (struct xpnet_message *)&msg_buffer[0]; u64 start_addr, end_addr; - long dp; - u8 second_mac_octet; short dest_partid; - struct xpnet_dev_private *priv; - u16 embedded_bytes; - - priv = (struct xpnet_dev_private *)dev->priv; + struct xpnet_dev_private *priv = (struct xpnet_dev_private *)dev->priv; + u16 embedded_bytes = 0; dev_dbg(xpnet, ">skb->head=0x%p skb->data=0x%p skb->tail=0x%p " "skb->end=0x%p skb->len=%d\n", (void *)skb->head, (void *)skb->data, skb_tail_pointer(skb), skb_end_pointer(skb), skb->len); + if (skb->data[0] == 0x33) { + dev_kfree_skb(skb); + return 0; /* nothing needed to be done */ + } + /* * The xpnet_pending_msg tracks how many outstanding * xpc_send_notifies are relying on this skb. When none @@ -465,7 +489,6 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) "packet\n", sizeof(struct xpnet_pending_msg)); priv->stats.tx_errors++; - return -ENOMEM; } @@ -474,7 +497,6 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) end_addr = L1_CACHE_ALIGN((u64)skb_tail_pointer(skb)); /* calculate how many bytes to embed in the XPC message */ - embedded_bytes = 0; if (unlikely(skb->len <= XPNET_MSG_DATA_MAX)) { /* skb->data does fit so embed */ embedded_bytes = skb->len; @@ -490,78 +512,28 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) atomic_set(&queued_msg->use_count, 1); queued_msg->skb = skb; - second_mac_octet = skb->data[XPNET_PARTID_OCTET]; - if (second_mac_octet == 0xff) { + if (skb->data[0] == 0xff) { /* we are being asked to broadcast to all partitions */ - dp = xpnet_broadcast_partitions; - } else if (second_mac_octet != 0) { - dp = xpnet_broadcast_partitions & - (1UL << (second_mac_octet - 1)); - } else { - /* 0 is an invalid partid. Ignore */ - dp = 0; - } - dev_dbg(xpnet, "destination Partitions mask (dp) = 0x%lx\n", dp); - - /* - * If we wanted to allow promiscuous mode to work like an - * unswitched network, this would be a good point to OR in a - * mask of partitions which should be receiving all packets. - */ - - /* - * Main send loop. - */ - for (dest_partid = 0; dp && dest_partid < xp_max_npartitions; - dest_partid++) { + for_each_bit(dest_partid, xpnet_broadcast_partitions, + xp_max_npartitions) { - if (!(dp & (1UL << (dest_partid - 1)))) { - /* not destined for this partition */ - continue; + xpnet_send(skb, queued_msg, start_addr, end_addr, + embedded_bytes, dest_partid); } + } else { + dest_partid = (short)skb->data[XPNET_PARTID_OCTET + 1]; + dest_partid |= (short)skb->data[XPNET_PARTID_OCTET + 0] << 8; - /* remove this partition from the destinations mask */ - dp &= ~(1UL << (dest_partid - 1)); - - /* found a partition to send to */ + if (dest_partid >= 0 && + dest_partid < xp_max_npartitions && + test_bit(dest_partid, xpnet_broadcast_partitions) != 0) { - msg->embedded_bytes = embedded_bytes; - if (unlikely(embedded_bytes != 0)) { - msg->version = XPNET_VERSION_EMBED; - dev_dbg(xpnet, "calling memcpy(0x%p, 0x%p, 0x%lx)\n", - &msg->data, skb->data, (size_t)embedded_bytes); - skb_copy_from_linear_data(skb, &msg->data, - (size_t)embedded_bytes); - } else { - msg->version = XPNET_VERSION; - } - msg->magic = XPNET_MAGIC; - msg->size = end_addr - start_addr; - msg->leadin_ignore = (u64)skb->data - start_addr; - msg->tailout_ignore = end_addr - (u64)skb_tail_pointer(skb); - msg->buf_pa = __pa(start_addr); - - dev_dbg(xpnet, "sending XPC message to %d:%d\n" - KERN_DEBUG "msg->buf_pa=0x%lx, msg->size=%u, " - "msg->leadin_ignore=%u, msg->tailout_ignore=%u\n", - dest_partid, XPC_NET_CHANNEL, msg->buf_pa, msg->size, - msg->leadin_ignore, msg->tailout_ignore); - - atomic_inc(&queued_msg->use_count); - - ret = xpc_send_notify(dest_partid, XPC_NET_CHANNEL, XPC_NOWAIT, - &msg, sizeof(msg) + embedded_bytes - 1, - xpnet_send_completed, queued_msg); - if (unlikely(ret != xpSuccess)) { - atomic_dec(&queued_msg->use_count); - continue; + xpnet_send(skb, queued_msg, start_addr, end_addr, + embedded_bytes, dest_partid); } } if (atomic_dec_return(&queued_msg->use_count) == 0) { - dev_dbg(xpnet, "no partitions to receive packet destined for " - "%d\n", dest_partid); - dev_kfree_skb(skb); kfree(queued_msg); } @@ -589,23 +561,28 @@ xpnet_dev_tx_timeout(struct net_device *dev) static int __init xpnet_init(void) { - int i; - u32 license_num; - int result = -ENOMEM; + int result; - if (!ia64_platform_is("sn2")) + if (!is_shub() && !is_uv()) return -ENODEV; dev_info(xpnet, "registering network device %s\n", XPNET_DEVICE_NAME); + xpnet_broadcast_partitions = kzalloc(BITS_TO_LONGS(xp_max_npartitions) * + sizeof(long), GFP_KERNEL); + if (xpnet_broadcast_partitions == NULL) + return -ENOMEM; + /* * use ether_setup() to init the majority of our device * structure and then override the necessary pieces. */ xpnet_device = alloc_netdev(sizeof(struct xpnet_dev_private), XPNET_DEVICE_NAME, ether_setup); - if (xpnet_device == NULL) + if (xpnet_device == NULL) { + kfree(xpnet_broadcast_partitions); return -ENOMEM; + } netif_carrier_off(xpnet_device); @@ -623,14 +600,10 @@ xpnet_init(void) * MAC addresses. We chose the first octet of the MAC to be unlikely * to collide with any vendor's officially issued MAC. */ - xpnet_device->dev_addr[0] = 0xfe; - xpnet_device->dev_addr[XPNET_PARTID_OCTET] = sn_partition_id; - license_num = sn_partition_serial_number_val(); - for (i = 3; i >= 0; i--) { - xpnet_device->dev_addr[XPNET_LICENSE_OCTET + i] = - license_num & 0xff; - license_num = license_num >> 8; - } + xpnet_device->dev_addr[0] = 0x02; /* locally administered, no OUI */ + + xpnet_device->dev_addr[XPNET_PARTID_OCTET + 1] = sn_partition_id; + xpnet_device->dev_addr[XPNET_PARTID_OCTET + 0] = (sn_partition_id >> 8); /* * ether_setup() sets this to a multicast device. We are @@ -646,8 +619,10 @@ xpnet_init(void) xpnet_device->features = NETIF_F_NO_CSUM; result = register_netdev(xpnet_device); - if (result != 0) + if (result != 0) { free_netdev(xpnet_device); + kfree(xpnet_broadcast_partitions); + } return result; } @@ -661,8 +636,8 @@ xpnet_exit(void) xpnet_device[0].name); unregister_netdev(xpnet_device); - free_netdev(xpnet_device); + kfree(xpnet_broadcast_partitions); } module_exit(xpnet_exit); |