sgi-xp: enable XPNET to handle more than 64 partitions
Enable XPNET to support more than 64 partitions. Signed-off-by: Dean Nelson <dcn@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
185c3a1b4b
commit
a7b4d50920
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@ -21,7 +21,6 @@
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*/
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*/
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#include <linux/module.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/ioport.h>
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@ -32,8 +31,6 @@
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#include <linux/mii.h>
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#include <linux/mii.h>
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#include <linux/smp.h>
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#include <linux/smp.h>
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#include <linux/string.h>
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#include <linux/string.h>
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#include <asm/sn/io.h>
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#include <asm/sn/sn_sal.h>
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#include <asm/atomic.h>
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#include <asm/atomic.h>
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#include "xp.h"
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#include "xp.h"
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@ -104,7 +101,6 @@ struct xpnet_message {
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* then be released.
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* then be released.
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*/
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*/
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struct xpnet_pending_msg {
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struct xpnet_pending_msg {
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struct list_head free_list;
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struct sk_buff *skb;
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struct sk_buff *skb;
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atomic_t use_count;
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atomic_t use_count;
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};
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};
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@ -120,7 +116,7 @@ struct net_device *xpnet_device;
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* When we are notified of other partitions activating, we add them to
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* When we are notified of other partitions activating, we add them to
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* our bitmask of partitions to which we broadcast.
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* our bitmask of partitions to which we broadcast.
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*/
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*/
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static u64 xpnet_broadcast_partitions;
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static unsigned long *xpnet_broadcast_partitions;
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/* protect above */
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/* protect above */
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static DEFINE_SPINLOCK(xpnet_broadcast_lock);
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static DEFINE_SPINLOCK(xpnet_broadcast_lock);
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@ -140,16 +136,13 @@ static DEFINE_SPINLOCK(xpnet_broadcast_lock);
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#define XPNET_DEF_MTU (0x8000UL)
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#define XPNET_DEF_MTU (0x8000UL)
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/*
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/*
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* The partition id is encapsulated in the MAC address. The following
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* The partid is encapsulated in the MAC address beginning in the following
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* define locates the octet the partid is in.
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* octet and it consists of two octets.
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*/
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*/
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#define XPNET_PARTID_OCTET 1
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#define XPNET_PARTID_OCTET 2
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#define XPNET_LICENSE_OCTET 2
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/* Define the XPNET debug device structures to be used with dev_dbg() et al */
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/*
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* Define the XPNET debug device structure that is to be used with dev_dbg(),
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* dev_err(), dev_warn(), and dev_info().
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*/
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struct device_driver xpnet_dbg_name = {
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struct device_driver xpnet_dbg_name = {
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.name = "xpnet"
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.name = "xpnet"
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};
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};
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@ -231,7 +224,7 @@ xpnet_receive(short partid, int channel, struct xpnet_message *msg)
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(void *)msg->buf_pa, msg->size);
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(void *)msg->buf_pa, msg->size);
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ret = xp_remote_memcpy((void *)((u64)skb->data &
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ret = xp_remote_memcpy((void *)((u64)skb->data &
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~(L1_CACHE_BYTES - 1)),
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~(L1_CACHE_BYTES - 1)),
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(void *)msg->buf_pa, msg->size);
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(void *)msg->buf_pa, msg->size);
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if (ret != xpSuccess) {
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if (ret != xpSuccess) {
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@ -283,8 +276,6 @@ static void
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xpnet_connection_activity(enum xp_retval reason, short partid, int channel,
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xpnet_connection_activity(enum xp_retval reason, short partid, int channel,
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void *data, void *key)
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void *data, void *key)
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{
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{
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long bp;
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DBUG_ON(partid < 0 || partid >= xp_max_npartitions);
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DBUG_ON(partid < 0 || partid >= xp_max_npartitions);
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DBUG_ON(channel != XPC_NET_CHANNEL);
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DBUG_ON(channel != XPC_NET_CHANNEL);
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@ -297,31 +288,28 @@ xpnet_connection_activity(enum xp_retval reason, short partid, int channel,
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case xpConnected: /* connection completed to a partition */
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case xpConnected: /* connection completed to a partition */
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spin_lock_bh(&xpnet_broadcast_lock);
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spin_lock_bh(&xpnet_broadcast_lock);
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xpnet_broadcast_partitions |= 1UL << (partid - 1);
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__set_bit(partid, xpnet_broadcast_partitions);
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bp = xpnet_broadcast_partitions;
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spin_unlock_bh(&xpnet_broadcast_lock);
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spin_unlock_bh(&xpnet_broadcast_lock);
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netif_carrier_on(xpnet_device);
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netif_carrier_on(xpnet_device);
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dev_dbg(xpnet, "%s connection created to partition %d; "
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dev_dbg(xpnet, "%s connected to partition %d\n",
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"xpnet_broadcast_partitions=0x%lx\n",
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xpnet_device->name, partid);
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xpnet_device->name, partid, bp);
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break;
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break;
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default:
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default:
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spin_lock_bh(&xpnet_broadcast_lock);
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spin_lock_bh(&xpnet_broadcast_lock);
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xpnet_broadcast_partitions &= ~(1UL << (partid - 1));
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__clear_bit(partid, xpnet_broadcast_partitions);
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bp = xpnet_broadcast_partitions;
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spin_unlock_bh(&xpnet_broadcast_lock);
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spin_unlock_bh(&xpnet_broadcast_lock);
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if (bp == 0)
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if (bitmap_empty((unsigned long *)xpnet_broadcast_partitions,
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xp_max_npartitions)) {
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netif_carrier_off(xpnet_device);
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netif_carrier_off(xpnet_device);
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}
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dev_dbg(xpnet, "%s disconnected from partition %d; "
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dev_dbg(xpnet, "%s disconnected from partition %d\n",
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"xpnet_broadcast_partitions=0x%lx\n",
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xpnet_device->name, partid);
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xpnet_device->name, partid, bp);
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break;
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break;
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}
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}
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}
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}
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@ -424,36 +412,72 @@ xpnet_send_completed(enum xp_retval reason, short partid, int channel,
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}
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}
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}
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}
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static void
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xpnet_send(struct sk_buff *skb, struct xpnet_pending_msg *queued_msg,
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u64 start_addr, u64 end_addr, u16 embedded_bytes, int dest_partid)
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{
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u8 msg_buffer[XPNET_MSG_SIZE];
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struct xpnet_message *msg = (struct xpnet_message *)&msg_buffer;
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enum xp_retval ret;
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msg->embedded_bytes = embedded_bytes;
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if (unlikely(embedded_bytes != 0)) {
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msg->version = XPNET_VERSION_EMBED;
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dev_dbg(xpnet, "calling memcpy(0x%p, 0x%p, 0x%lx)\n",
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&msg->data, skb->data, (size_t)embedded_bytes);
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skb_copy_from_linear_data(skb, &msg->data,
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(size_t)embedded_bytes);
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} else {
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msg->version = XPNET_VERSION;
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}
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msg->magic = XPNET_MAGIC;
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msg->size = end_addr - start_addr;
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msg->leadin_ignore = (u64)skb->data - start_addr;
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msg->tailout_ignore = end_addr - (u64)skb_tail_pointer(skb);
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msg->buf_pa = __pa(start_addr);
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dev_dbg(xpnet, "sending XPC message to %d:%d\n"
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KERN_DEBUG "msg->buf_pa=0x%lx, msg->size=%u, "
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"msg->leadin_ignore=%u, msg->tailout_ignore=%u\n",
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dest_partid, XPC_NET_CHANNEL, msg->buf_pa, msg->size,
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msg->leadin_ignore, msg->tailout_ignore);
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atomic_inc(&queued_msg->use_count);
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ret = xpc_send_notify(dest_partid, XPC_NET_CHANNEL, XPC_NOWAIT, msg,
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XPNET_MSG_SIZE, xpnet_send_completed, queued_msg);
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if (unlikely(ret != xpSuccess))
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atomic_dec(&queued_msg->use_count);
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}
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/*
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/*
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* Network layer has formatted a packet (skb) and is ready to place it
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* Network layer has formatted a packet (skb) and is ready to place it
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* "on the wire". Prepare and send an xpnet_message to all partitions
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* "on the wire". Prepare and send an xpnet_message to all partitions
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* which have connected with us and are targets of this packet.
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* which have connected with us and are targets of this packet.
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*
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*
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* MAC-NOTE: For the XPNET driver, the MAC address contains the
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* MAC-NOTE: For the XPNET driver, the MAC address contains the
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* destination partition_id. If the destination partition id word
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* destination partid. If the destination partid octets are 0xffff,
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* is 0xff, this packet is to broadcast to all partitions.
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* this packet is to be broadcast to all connected partitions.
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*/
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*/
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static int
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static int
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xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
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xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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{
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struct xpnet_pending_msg *queued_msg;
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struct xpnet_pending_msg *queued_msg;
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enum xp_retval ret;
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u8 msg_buffer[XPNET_MSG_SIZE];
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struct xpnet_message *msg = (struct xpnet_message *)&msg_buffer[0];
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u64 start_addr, end_addr;
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u64 start_addr, end_addr;
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long dp;
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u8 second_mac_octet;
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short dest_partid;
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short dest_partid;
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struct xpnet_dev_private *priv;
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struct xpnet_dev_private *priv = (struct xpnet_dev_private *)dev->priv;
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u16 embedded_bytes;
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u16 embedded_bytes = 0;
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priv = (struct xpnet_dev_private *)dev->priv;
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dev_dbg(xpnet, ">skb->head=0x%p skb->data=0x%p skb->tail=0x%p "
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dev_dbg(xpnet, ">skb->head=0x%p skb->data=0x%p skb->tail=0x%p "
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"skb->end=0x%p skb->len=%d\n", (void *)skb->head,
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"skb->end=0x%p skb->len=%d\n", (void *)skb->head,
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(void *)skb->data, skb_tail_pointer(skb), skb_end_pointer(skb),
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(void *)skb->data, skb_tail_pointer(skb), skb_end_pointer(skb),
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skb->len);
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skb->len);
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if (skb->data[0] == 0x33) {
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dev_kfree_skb(skb);
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return 0; /* nothing needed to be done */
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}
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/*
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/*
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* The xpnet_pending_msg tracks how many outstanding
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* The xpnet_pending_msg tracks how many outstanding
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* xpc_send_notifies are relying on this skb. When none
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* xpc_send_notifies are relying on this skb. When none
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@ -465,7 +489,6 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
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"packet\n", sizeof(struct xpnet_pending_msg));
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"packet\n", sizeof(struct xpnet_pending_msg));
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priv->stats.tx_errors++;
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priv->stats.tx_errors++;
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return -ENOMEM;
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return -ENOMEM;
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}
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}
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@ -474,7 +497,6 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
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end_addr = L1_CACHE_ALIGN((u64)skb_tail_pointer(skb));
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end_addr = L1_CACHE_ALIGN((u64)skb_tail_pointer(skb));
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/* calculate how many bytes to embed in the XPC message */
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/* calculate how many bytes to embed in the XPC message */
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embedded_bytes = 0;
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if (unlikely(skb->len <= XPNET_MSG_DATA_MAX)) {
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if (unlikely(skb->len <= XPNET_MSG_DATA_MAX)) {
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/* skb->data does fit so embed */
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/* skb->data does fit so embed */
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embedded_bytes = skb->len;
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embedded_bytes = skb->len;
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@ -490,78 +512,28 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
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atomic_set(&queued_msg->use_count, 1);
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atomic_set(&queued_msg->use_count, 1);
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queued_msg->skb = skb;
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queued_msg->skb = skb;
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second_mac_octet = skb->data[XPNET_PARTID_OCTET];
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if (skb->data[0] == 0xff) {
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if (second_mac_octet == 0xff) {
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/* we are being asked to broadcast to all partitions */
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/* we are being asked to broadcast to all partitions */
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dp = xpnet_broadcast_partitions;
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for_each_bit(dest_partid, xpnet_broadcast_partitions,
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} else if (second_mac_octet != 0) {
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xp_max_npartitions) {
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dp = xpnet_broadcast_partitions &
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(1UL << (second_mac_octet - 1));
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xpnet_send(skb, queued_msg, start_addr, end_addr,
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embedded_bytes, dest_partid);
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}
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} else {
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} else {
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/* 0 is an invalid partid. Ignore */
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dest_partid = (short)skb->data[XPNET_PARTID_OCTET + 1];
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dp = 0;
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dest_partid |= (short)skb->data[XPNET_PARTID_OCTET + 0] << 8;
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}
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dev_dbg(xpnet, "destination Partitions mask (dp) = 0x%lx\n", dp);
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/*
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if (dest_partid >= 0 &&
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* If we wanted to allow promiscuous mode to work like an
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dest_partid < xp_max_npartitions &&
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* unswitched network, this would be a good point to OR in a
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test_bit(dest_partid, xpnet_broadcast_partitions) != 0) {
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* mask of partitions which should be receiving all packets.
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*/
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/*
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xpnet_send(skb, queued_msg, start_addr, end_addr,
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* Main send loop.
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embedded_bytes, dest_partid);
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*/
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for (dest_partid = 0; dp && dest_partid < xp_max_npartitions;
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dest_partid++) {
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if (!(dp & (1UL << (dest_partid - 1)))) {
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/* not destined for this partition */
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continue;
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}
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/* remove this partition from the destinations mask */
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dp &= ~(1UL << (dest_partid - 1));
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/* found a partition to send to */
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msg->embedded_bytes = embedded_bytes;
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if (unlikely(embedded_bytes != 0)) {
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msg->version = XPNET_VERSION_EMBED;
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dev_dbg(xpnet, "calling memcpy(0x%p, 0x%p, 0x%lx)\n",
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&msg->data, skb->data, (size_t)embedded_bytes);
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skb_copy_from_linear_data(skb, &msg->data,
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(size_t)embedded_bytes);
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} else {
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msg->version = XPNET_VERSION;
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}
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msg->magic = XPNET_MAGIC;
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msg->size = end_addr - start_addr;
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msg->leadin_ignore = (u64)skb->data - start_addr;
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msg->tailout_ignore = end_addr - (u64)skb_tail_pointer(skb);
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msg->buf_pa = __pa(start_addr);
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dev_dbg(xpnet, "sending XPC message to %d:%d\n"
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KERN_DEBUG "msg->buf_pa=0x%lx, msg->size=%u, "
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"msg->leadin_ignore=%u, msg->tailout_ignore=%u\n",
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dest_partid, XPC_NET_CHANNEL, msg->buf_pa, msg->size,
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msg->leadin_ignore, msg->tailout_ignore);
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atomic_inc(&queued_msg->use_count);
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ret = xpc_send_notify(dest_partid, XPC_NET_CHANNEL, XPC_NOWAIT,
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&msg, sizeof(msg) + embedded_bytes - 1,
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xpnet_send_completed, queued_msg);
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if (unlikely(ret != xpSuccess)) {
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atomic_dec(&queued_msg->use_count);
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continue;
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}
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}
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}
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}
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if (atomic_dec_return(&queued_msg->use_count) == 0) {
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if (atomic_dec_return(&queued_msg->use_count) == 0) {
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dev_dbg(xpnet, "no partitions to receive packet destined for "
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"%d\n", dest_partid);
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dev_kfree_skb(skb);
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dev_kfree_skb(skb);
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kfree(queued_msg);
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kfree(queued_msg);
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}
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}
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@ -589,23 +561,28 @@ xpnet_dev_tx_timeout(struct net_device *dev)
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static int __init
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static int __init
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xpnet_init(void)
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xpnet_init(void)
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{
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{
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int i;
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int result;
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u32 license_num;
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int result = -ENOMEM;
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if (!ia64_platform_is("sn2"))
|
if (!is_shub() && !is_uv())
|
||||||
return -ENODEV;
|
return -ENODEV;
|
||||||
|
|
||||||
dev_info(xpnet, "registering network device %s\n", XPNET_DEVICE_NAME);
|
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
|
* use ether_setup() to init the majority of our device
|
||||||
* structure and then override the necessary pieces.
|
* structure and then override the necessary pieces.
|
||||||
*/
|
*/
|
||||||
xpnet_device = alloc_netdev(sizeof(struct xpnet_dev_private),
|
xpnet_device = alloc_netdev(sizeof(struct xpnet_dev_private),
|
||||||
XPNET_DEVICE_NAME, ether_setup);
|
XPNET_DEVICE_NAME, ether_setup);
|
||||||
if (xpnet_device == NULL)
|
if (xpnet_device == NULL) {
|
||||||
|
kfree(xpnet_broadcast_partitions);
|
||||||
return -ENOMEM;
|
return -ENOMEM;
|
||||||
|
}
|
||||||
|
|
||||||
netif_carrier_off(xpnet_device);
|
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
|
* MAC addresses. We chose the first octet of the MAC to be unlikely
|
||||||
* to collide with any vendor's officially issued MAC.
|
* to collide with any vendor's officially issued MAC.
|
||||||
*/
|
*/
|
||||||
xpnet_device->dev_addr[0] = 0xfe;
|
xpnet_device->dev_addr[0] = 0x02; /* locally administered, no OUI */
|
||||||
xpnet_device->dev_addr[XPNET_PARTID_OCTET] = sn_partition_id;
|
|
||||||
license_num = sn_partition_serial_number_val();
|
xpnet_device->dev_addr[XPNET_PARTID_OCTET + 1] = sn_partition_id;
|
||||||
for (i = 3; i >= 0; i--) {
|
xpnet_device->dev_addr[XPNET_PARTID_OCTET + 0] = (sn_partition_id >> 8);
|
||||||
xpnet_device->dev_addr[XPNET_LICENSE_OCTET + i] =
|
|
||||||
license_num & 0xff;
|
|
||||||
license_num = license_num >> 8;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* ether_setup() sets this to a multicast device. We are
|
* ether_setup() sets this to a multicast device. We are
|
||||||
|
@ -646,8 +619,10 @@ xpnet_init(void)
|
||||||
xpnet_device->features = NETIF_F_NO_CSUM;
|
xpnet_device->features = NETIF_F_NO_CSUM;
|
||||||
|
|
||||||
result = register_netdev(xpnet_device);
|
result = register_netdev(xpnet_device);
|
||||||
if (result != 0)
|
if (result != 0) {
|
||||||
free_netdev(xpnet_device);
|
free_netdev(xpnet_device);
|
||||||
|
kfree(xpnet_broadcast_partitions);
|
||||||
|
}
|
||||||
|
|
||||||
return result;
|
return result;
|
||||||
}
|
}
|
||||||
|
@ -661,8 +636,8 @@ xpnet_exit(void)
|
||||||
xpnet_device[0].name);
|
xpnet_device[0].name);
|
||||||
|
|
||||||
unregister_netdev(xpnet_device);
|
unregister_netdev(xpnet_device);
|
||||||
|
|
||||||
free_netdev(xpnet_device);
|
free_netdev(xpnet_device);
|
||||||
|
kfree(xpnet_broadcast_partitions);
|
||||||
}
|
}
|
||||||
|
|
||||||
module_exit(xpnet_exit);
|
module_exit(xpnet_exit);
|
||||||
|
|
Loading…
Reference in a new issue