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@@ -0,0 +1,1199 @@
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+/*
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+ * Copyright Gavin Shan, IBM Corporation 2016.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/kernel.h>
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+#include <linux/init.h>
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+#include <linux/netdevice.h>
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+#include <linux/skbuff.h>
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+#include <linux/netlink.h>
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+
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+#include <net/ncsi.h>
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+#include <net/net_namespace.h>
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+#include <net/sock.h>
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+#include <net/addrconf.h>
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+#include <net/ipv6.h>
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+#include <net/if_inet6.h>
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+
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+#include "internal.h"
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+#include "ncsi-pkt.h"
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+
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+LIST_HEAD(ncsi_dev_list);
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+DEFINE_SPINLOCK(ncsi_dev_lock);
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+
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+static inline int ncsi_filter_size(int table)
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+{
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+ int sizes[] = { 2, 6, 6, 6 };
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+
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+ BUILD_BUG_ON(ARRAY_SIZE(sizes) != NCSI_FILTER_MAX);
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+ if (table < NCSI_FILTER_BASE || table >= NCSI_FILTER_MAX)
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+ return -EINVAL;
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+
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+ return sizes[table];
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+}
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+
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+int ncsi_find_filter(struct ncsi_channel *nc, int table, void *data)
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+{
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+ struct ncsi_channel_filter *ncf;
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+ void *bitmap;
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+ int index, size;
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+ unsigned long flags;
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+
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+ ncf = nc->filters[table];
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+ if (!ncf)
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+ return -ENXIO;
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+
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+ size = ncsi_filter_size(table);
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+ if (size < 0)
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+ return size;
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+
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+ spin_lock_irqsave(&nc->lock, flags);
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+ bitmap = (void *)&ncf->bitmap;
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+ index = -1;
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+ while ((index = find_next_bit(bitmap, ncf->total, index + 1))
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+ < ncf->total) {
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+ if (!memcmp(ncf->data + size * index, data, size)) {
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+ spin_unlock_irqrestore(&nc->lock, flags);
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+ return index;
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+ }
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+ }
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+ spin_unlock_irqrestore(&nc->lock, flags);
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+
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+ return -ENOENT;
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+}
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+
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+int ncsi_add_filter(struct ncsi_channel *nc, int table, void *data)
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+{
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+ struct ncsi_channel_filter *ncf;
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+ int index, size;
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+ void *bitmap;
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+ unsigned long flags;
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+
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+ size = ncsi_filter_size(table);
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+ if (size < 0)
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+ return size;
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+
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+ index = ncsi_find_filter(nc, table, data);
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+ if (index >= 0)
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+ return index;
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+
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+ ncf = nc->filters[table];
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+ if (!ncf)
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+ return -ENODEV;
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+
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+ spin_lock_irqsave(&nc->lock, flags);
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+ bitmap = (void *)&ncf->bitmap;
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+ do {
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+ index = find_next_zero_bit(bitmap, ncf->total, 0);
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+ if (index >= ncf->total) {
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+ spin_unlock_irqrestore(&nc->lock, flags);
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+ return -ENOSPC;
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+ }
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+ } while (test_and_set_bit(index, bitmap));
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+
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+ memcpy(ncf->data + size * index, data, size);
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+ spin_unlock_irqrestore(&nc->lock, flags);
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+
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+ return index;
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+}
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+
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+int ncsi_remove_filter(struct ncsi_channel *nc, int table, int index)
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+{
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+ struct ncsi_channel_filter *ncf;
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+ int size;
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+ void *bitmap;
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+ unsigned long flags;
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+
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+ size = ncsi_filter_size(table);
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+ if (size < 0)
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+ return size;
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+
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+ ncf = nc->filters[table];
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+ if (!ncf || index >= ncf->total)
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+ return -ENODEV;
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+
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+ spin_lock_irqsave(&nc->lock, flags);
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+ bitmap = (void *)&ncf->bitmap;
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+ if (test_and_clear_bit(index, bitmap))
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+ memset(ncf->data + size * index, 0, size);
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+ spin_unlock_irqrestore(&nc->lock, flags);
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+
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+ return 0;
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+}
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+
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+static void ncsi_report_link(struct ncsi_dev_priv *ndp, bool force_down)
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+{
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+ struct ncsi_dev *nd = &ndp->ndev;
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+ struct ncsi_package *np;
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+ struct ncsi_channel *nc;
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+
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+ nd->state = ncsi_dev_state_functional;
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+ if (force_down) {
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+ nd->link_up = 0;
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+ goto report;
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+ }
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+
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+ nd->link_up = 0;
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+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
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+ NCSI_FOR_EACH_CHANNEL(np, nc) {
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+ if (!list_empty(&nc->link) ||
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+ nc->state != NCSI_CHANNEL_ACTIVE)
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+ continue;
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+
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+ if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) {
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+ nd->link_up = 1;
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+ goto report;
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+ }
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+ }
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+ }
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+
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+report:
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+ nd->handler(nd);
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+}
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+
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+static void ncsi_channel_monitor(unsigned long data)
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+{
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+ struct ncsi_channel *nc = (struct ncsi_channel *)data;
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+ struct ncsi_package *np = nc->package;
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+ struct ncsi_dev_priv *ndp = np->ndp;
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+ struct ncsi_cmd_arg nca;
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+ bool enabled;
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+ unsigned int timeout;
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+ unsigned long flags;
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+ int ret;
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+
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+ spin_lock_irqsave(&nc->lock, flags);
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+ timeout = nc->timeout;
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+ enabled = nc->enabled;
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+ spin_unlock_irqrestore(&nc->lock, flags);
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+
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+ if (!enabled || !list_empty(&nc->link))
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+ return;
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+ if (nc->state != NCSI_CHANNEL_INACTIVE &&
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+ nc->state != NCSI_CHANNEL_ACTIVE)
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+ return;
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+
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+ if (!(timeout % 2)) {
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+ nca.ndp = ndp;
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+ nca.package = np->id;
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+ nca.channel = nc->id;
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+ nca.type = NCSI_PKT_CMD_GLS;
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+ nca.driven = false;
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+ ret = ncsi_xmit_cmd(&nca);
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+ if (ret) {
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+ netdev_err(ndp->ndev.dev, "Error %d sending GLS\n",
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+ ret);
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+ return;
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+ }
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+ }
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+
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+ if (timeout + 1 >= 3) {
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+ if (!(ndp->flags & NCSI_DEV_HWA) &&
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+ nc->state == NCSI_CHANNEL_ACTIVE)
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+ ncsi_report_link(ndp, true);
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+
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+ spin_lock_irqsave(&ndp->lock, flags);
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+ xchg(&nc->state, NCSI_CHANNEL_INACTIVE);
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+ list_add_tail_rcu(&nc->link, &ndp->channel_queue);
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+ spin_unlock_irqrestore(&ndp->lock, flags);
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+ ncsi_process_next_channel(ndp);
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+ return;
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+ }
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+
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+ spin_lock_irqsave(&nc->lock, flags);
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+ nc->timeout = timeout + 1;
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+ nc->enabled = true;
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+ spin_unlock_irqrestore(&nc->lock, flags);
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+ mod_timer(&nc->timer, jiffies + HZ * (1 << (nc->timeout / 2)));
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+}
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+
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+void ncsi_start_channel_monitor(struct ncsi_channel *nc)
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+{
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+ unsigned long flags;
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+
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+ spin_lock_irqsave(&nc->lock, flags);
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+ WARN_ON_ONCE(nc->enabled);
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+ nc->timeout = 0;
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+ nc->enabled = true;
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+ spin_unlock_irqrestore(&nc->lock, flags);
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+
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+ mod_timer(&nc->timer, jiffies + HZ * (1 << (nc->timeout / 2)));
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+}
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+
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+void ncsi_stop_channel_monitor(struct ncsi_channel *nc)
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+{
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+ unsigned long flags;
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+
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+ spin_lock_irqsave(&nc->lock, flags);
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+ if (!nc->enabled) {
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+ spin_unlock_irqrestore(&nc->lock, flags);
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+ return;
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+ }
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+ nc->enabled = false;
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+ spin_unlock_irqrestore(&nc->lock, flags);
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+
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+ del_timer_sync(&nc->timer);
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+}
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+
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+struct ncsi_channel *ncsi_find_channel(struct ncsi_package *np,
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+ unsigned char id)
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+{
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+ struct ncsi_channel *nc;
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+
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+ NCSI_FOR_EACH_CHANNEL(np, nc) {
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+ if (nc->id == id)
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+ return nc;
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+ }
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+
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+ return NULL;
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+}
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+
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+struct ncsi_channel *ncsi_add_channel(struct ncsi_package *np, unsigned char id)
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+{
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+ struct ncsi_channel *nc, *tmp;
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+ int index;
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+ unsigned long flags;
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+
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+ nc = kzalloc(sizeof(*nc), GFP_ATOMIC);
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+ if (!nc)
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+ return NULL;
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+
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+ nc->id = id;
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+ nc->package = np;
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+ nc->state = NCSI_CHANNEL_INACTIVE;
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+ nc->enabled = false;
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+ setup_timer(&nc->timer, ncsi_channel_monitor, (unsigned long)nc);
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+ spin_lock_init(&nc->lock);
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+ INIT_LIST_HEAD(&nc->link);
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+ for (index = 0; index < NCSI_CAP_MAX; index++)
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+ nc->caps[index].index = index;
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+ for (index = 0; index < NCSI_MODE_MAX; index++)
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+ nc->modes[index].index = index;
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+
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+ spin_lock_irqsave(&np->lock, flags);
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+ tmp = ncsi_find_channel(np, id);
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+ if (tmp) {
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+ spin_unlock_irqrestore(&np->lock, flags);
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+ kfree(nc);
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+ return tmp;
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+ }
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+
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+ list_add_tail_rcu(&nc->node, &np->channels);
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+ np->channel_num++;
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+ spin_unlock_irqrestore(&np->lock, flags);
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+
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+ return nc;
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+}
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+
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+static void ncsi_remove_channel(struct ncsi_channel *nc)
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+{
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+ struct ncsi_package *np = nc->package;
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+ struct ncsi_channel_filter *ncf;
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+ unsigned long flags;
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+ int i;
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+
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+ /* Release filters */
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+ spin_lock_irqsave(&nc->lock, flags);
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+ for (i = 0; i < NCSI_FILTER_MAX; i++) {
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+ ncf = nc->filters[i];
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+ if (!ncf)
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+ continue;
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+
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+ nc->filters[i] = NULL;
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+ kfree(ncf);
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+ }
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+
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+ nc->state = NCSI_CHANNEL_INACTIVE;
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+ spin_unlock_irqrestore(&nc->lock, flags);
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+ ncsi_stop_channel_monitor(nc);
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+
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+ /* Remove and free channel */
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+ spin_lock_irqsave(&np->lock, flags);
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+ list_del_rcu(&nc->node);
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+ np->channel_num--;
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+ spin_unlock_irqrestore(&np->lock, flags);
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+
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+ kfree(nc);
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+}
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+
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+struct ncsi_package *ncsi_find_package(struct ncsi_dev_priv *ndp,
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+ unsigned char id)
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+{
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+ struct ncsi_package *np;
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+
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+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
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+ if (np->id == id)
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+ return np;
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+ }
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+
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+ return NULL;
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+}
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+
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+struct ncsi_package *ncsi_add_package(struct ncsi_dev_priv *ndp,
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+ unsigned char id)
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+{
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+ struct ncsi_package *np, *tmp;
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+ unsigned long flags;
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+
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+ np = kzalloc(sizeof(*np), GFP_ATOMIC);
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+ if (!np)
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+ return NULL;
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+
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+ np->id = id;
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+ np->ndp = ndp;
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+ spin_lock_init(&np->lock);
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+ INIT_LIST_HEAD(&np->channels);
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+
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+ spin_lock_irqsave(&ndp->lock, flags);
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+ tmp = ncsi_find_package(ndp, id);
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+ if (tmp) {
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+ spin_unlock_irqrestore(&ndp->lock, flags);
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+ kfree(np);
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+ return tmp;
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+ }
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+
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+ list_add_tail_rcu(&np->node, &ndp->packages);
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+ ndp->package_num++;
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+ spin_unlock_irqrestore(&ndp->lock, flags);
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+
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+ return np;
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+}
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+
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+void ncsi_remove_package(struct ncsi_package *np)
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+{
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+ struct ncsi_dev_priv *ndp = np->ndp;
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+ struct ncsi_channel *nc, *tmp;
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+ unsigned long flags;
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+
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+ /* Release all child channels */
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+ list_for_each_entry_safe(nc, tmp, &np->channels, node)
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+ ncsi_remove_channel(nc);
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+
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+ /* Remove and free package */
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+ spin_lock_irqsave(&ndp->lock, flags);
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+ list_del_rcu(&np->node);
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+ ndp->package_num--;
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+ spin_unlock_irqrestore(&ndp->lock, flags);
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+
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+ kfree(np);
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+}
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+
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+void ncsi_find_package_and_channel(struct ncsi_dev_priv *ndp,
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+ unsigned char id,
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+ struct ncsi_package **np,
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+ struct ncsi_channel **nc)
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+{
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+ struct ncsi_package *p;
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+ struct ncsi_channel *c;
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+
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+ p = ncsi_find_package(ndp, NCSI_PACKAGE_INDEX(id));
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+ c = p ? ncsi_find_channel(p, NCSI_CHANNEL_INDEX(id)) : NULL;
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+
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+ if (np)
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+ *np = p;
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+ if (nc)
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+ *nc = c;
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+}
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+
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+/* For two consecutive NCSI commands, the packet IDs shouldn't
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+ * be same. Otherwise, the bogus response might be replied. So
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+ * the available IDs are allocated in round-robin fashion.
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+ */
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+struct ncsi_request *ncsi_alloc_request(struct ncsi_dev_priv *ndp, bool driven)
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+{
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+ struct ncsi_request *nr = NULL;
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+ int i, limit = ARRAY_SIZE(ndp->requests);
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+ unsigned long flags;
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+
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+ /* Check if there is one available request until the ceiling */
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+ spin_lock_irqsave(&ndp->lock, flags);
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+ for (i = ndp->request_id; !nr && i < limit; i++) {
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+ if (ndp->requests[i].used)
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+ continue;
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+
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+ nr = &ndp->requests[i];
|
|
|
+ nr->used = true;
|
|
|
+ nr->driven = driven;
|
|
|
+ if (++ndp->request_id >= limit)
|
|
|
+ ndp->request_id = 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Fail back to check from the starting cursor */
|
|
|
+ for (i = 0; !nr && i < ndp->request_id; i++) {
|
|
|
+ if (ndp->requests[i].used)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ nr = &ndp->requests[i];
|
|
|
+ nr->used = true;
|
|
|
+ nr->driven = driven;
|
|
|
+ if (++ndp->request_id >= limit)
|
|
|
+ ndp->request_id = 0;
|
|
|
+ }
|
|
|
+ spin_unlock_irqrestore(&ndp->lock, flags);
|
|
|
+
|
|
|
+ return nr;
|
|
|
+}
|
|
|
+
|
|
|
+void ncsi_free_request(struct ncsi_request *nr)
|
|
|
+{
|
|
|
+ struct ncsi_dev_priv *ndp = nr->ndp;
|
|
|
+ struct sk_buff *cmd, *rsp;
|
|
|
+ unsigned long flags;
|
|
|
+ bool driven;
|
|
|
+
|
|
|
+ if (nr->enabled) {
|
|
|
+ nr->enabled = false;
|
|
|
+ del_timer_sync(&nr->timer);
|
|
|
+ }
|
|
|
+
|
|
|
+ spin_lock_irqsave(&ndp->lock, flags);
|
|
|
+ cmd = nr->cmd;
|
|
|
+ rsp = nr->rsp;
|
|
|
+ nr->cmd = NULL;
|
|
|
+ nr->rsp = NULL;
|
|
|
+ nr->used = false;
|
|
|
+ driven = nr->driven;
|
|
|
+ spin_unlock_irqrestore(&ndp->lock, flags);
|
|
|
+
|
|
|
+ if (driven && cmd && --ndp->pending_req_num == 0)
|
|
|
+ schedule_work(&ndp->work);
|
|
|
+
|
|
|
+ /* Release command and response */
|
|
|
+ consume_skb(cmd);
|
|
|
+ consume_skb(rsp);
|
|
|
+}
|
|
|
+
|
|
|
+struct ncsi_dev *ncsi_find_dev(struct net_device *dev)
|
|
|
+{
|
|
|
+ struct ncsi_dev_priv *ndp;
|
|
|
+
|
|
|
+ NCSI_FOR_EACH_DEV(ndp) {
|
|
|
+ if (ndp->ndev.dev == dev)
|
|
|
+ return &ndp->ndev;
|
|
|
+ }
|
|
|
+
|
|
|
+ return NULL;
|
|
|
+}
|
|
|
+
|
|
|
+static void ncsi_request_timeout(unsigned long data)
|
|
|
+{
|
|
|
+ struct ncsi_request *nr = (struct ncsi_request *)data;
|
|
|
+ struct ncsi_dev_priv *ndp = nr->ndp;
|
|
|
+ unsigned long flags;
|
|
|
+
|
|
|
+ /* If the request already had associated response,
|
|
|
+ * let the response handler to release it.
|
|
|
+ */
|
|
|
+ spin_lock_irqsave(&ndp->lock, flags);
|
|
|
+ nr->enabled = false;
|
|
|
+ if (nr->rsp || !nr->cmd) {
|
|
|
+ spin_unlock_irqrestore(&ndp->lock, flags);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ spin_unlock_irqrestore(&ndp->lock, flags);
|
|
|
+
|
|
|
+ /* Release the request */
|
|
|
+ ncsi_free_request(nr);
|
|
|
+}
|
|
|
+
|
|
|
+static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp)
|
|
|
+{
|
|
|
+ struct ncsi_dev *nd = &ndp->ndev;
|
|
|
+ struct ncsi_package *np = ndp->active_package;
|
|
|
+ struct ncsi_channel *nc = ndp->active_channel;
|
|
|
+ struct ncsi_cmd_arg nca;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ nca.ndp = ndp;
|
|
|
+ nca.driven = true;
|
|
|
+ switch (nd->state) {
|
|
|
+ case ncsi_dev_state_suspend:
|
|
|
+ nd->state = ncsi_dev_state_suspend_select;
|
|
|
+ /* Fall through */
|
|
|
+ case ncsi_dev_state_suspend_select:
|
|
|
+ case ncsi_dev_state_suspend_dcnt:
|
|
|
+ case ncsi_dev_state_suspend_dc:
|
|
|
+ case ncsi_dev_state_suspend_deselect:
|
|
|
+ ndp->pending_req_num = 1;
|
|
|
+
|
|
|
+ np = ndp->active_package;
|
|
|
+ nc = ndp->active_channel;
|
|
|
+ nca.package = np->id;
|
|
|
+ if (nd->state == ncsi_dev_state_suspend_select) {
|
|
|
+ nca.type = NCSI_PKT_CMD_SP;
|
|
|
+ nca.channel = 0x1f;
|
|
|
+ if (ndp->flags & NCSI_DEV_HWA)
|
|
|
+ nca.bytes[0] = 0;
|
|
|
+ else
|
|
|
+ nca.bytes[0] = 1;
|
|
|
+ nd->state = ncsi_dev_state_suspend_dcnt;
|
|
|
+ } else if (nd->state == ncsi_dev_state_suspend_dcnt) {
|
|
|
+ nca.type = NCSI_PKT_CMD_DCNT;
|
|
|
+ nca.channel = nc->id;
|
|
|
+ nd->state = ncsi_dev_state_suspend_dc;
|
|
|
+ } else if (nd->state == ncsi_dev_state_suspend_dc) {
|
|
|
+ nca.type = NCSI_PKT_CMD_DC;
|
|
|
+ nca.channel = nc->id;
|
|
|
+ nca.bytes[0] = 1;
|
|
|
+ nd->state = ncsi_dev_state_suspend_deselect;
|
|
|
+ } else if (nd->state == ncsi_dev_state_suspend_deselect) {
|
|
|
+ nca.type = NCSI_PKT_CMD_DP;
|
|
|
+ nca.channel = 0x1f;
|
|
|
+ nd->state = ncsi_dev_state_suspend_done;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = ncsi_xmit_cmd(&nca);
|
|
|
+ if (ret) {
|
|
|
+ nd->state = ncsi_dev_state_functional;
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ break;
|
|
|
+ case ncsi_dev_state_suspend_done:
|
|
|
+ xchg(&nc->state, NCSI_CHANNEL_INACTIVE);
|
|
|
+ ncsi_process_next_channel(ndp);
|
|
|
+
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ netdev_warn(nd->dev, "Wrong NCSI state 0x%x in suspend\n",
|
|
|
+ nd->state);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
|
|
|
+{
|
|
|
+ struct ncsi_dev *nd = &ndp->ndev;
|
|
|
+ struct net_device *dev = nd->dev;
|
|
|
+ struct ncsi_package *np = ndp->active_package;
|
|
|
+ struct ncsi_channel *nc = ndp->active_channel;
|
|
|
+ struct ncsi_cmd_arg nca;
|
|
|
+ unsigned char index;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ nca.ndp = ndp;
|
|
|
+ nca.driven = true;
|
|
|
+ switch (nd->state) {
|
|
|
+ case ncsi_dev_state_config:
|
|
|
+ case ncsi_dev_state_config_sp:
|
|
|
+ ndp->pending_req_num = 1;
|
|
|
+
|
|
|
+ /* Select the specific package */
|
|
|
+ nca.type = NCSI_PKT_CMD_SP;
|
|
|
+ if (ndp->flags & NCSI_DEV_HWA)
|
|
|
+ nca.bytes[0] = 0;
|
|
|
+ else
|
|
|
+ nca.bytes[0] = 1;
|
|
|
+ nca.package = np->id;
|
|
|
+ nca.channel = 0x1f;
|
|
|
+ ret = ncsi_xmit_cmd(&nca);
|
|
|
+ if (ret)
|
|
|
+ goto error;
|
|
|
+
|
|
|
+ nd->state = ncsi_dev_state_config_cis;
|
|
|
+ break;
|
|
|
+ case ncsi_dev_state_config_cis:
|
|
|
+ ndp->pending_req_num = 1;
|
|
|
+
|
|
|
+ /* Clear initial state */
|
|
|
+ nca.type = NCSI_PKT_CMD_CIS;
|
|
|
+ nca.package = np->id;
|
|
|
+ nca.channel = nc->id;
|
|
|
+ ret = ncsi_xmit_cmd(&nca);
|
|
|
+ if (ret)
|
|
|
+ goto error;
|
|
|
+
|
|
|
+ nd->state = ncsi_dev_state_config_sma;
|
|
|
+ break;
|
|
|
+ case ncsi_dev_state_config_sma:
|
|
|
+ case ncsi_dev_state_config_ebf:
|
|
|
+#if IS_ENABLED(CONFIG_IPV6)
|
|
|
+ case ncsi_dev_state_config_egmf:
|
|
|
+#endif
|
|
|
+ case ncsi_dev_state_config_ecnt:
|
|
|
+ case ncsi_dev_state_config_ec:
|
|
|
+ case ncsi_dev_state_config_ae:
|
|
|
+ case ncsi_dev_state_config_gls:
|
|
|
+ ndp->pending_req_num = 1;
|
|
|
+
|
|
|
+ nca.package = np->id;
|
|
|
+ nca.channel = nc->id;
|
|
|
+
|
|
|
+ /* Use first entry in unicast filter table. Note that
|
|
|
+ * the MAC filter table starts from entry 1 instead of
|
|
|
+ * 0.
|
|
|
+ */
|
|
|
+ if (nd->state == ncsi_dev_state_config_sma) {
|
|
|
+ nca.type = NCSI_PKT_CMD_SMA;
|
|
|
+ for (index = 0; index < 6; index++)
|
|
|
+ nca.bytes[index] = dev->dev_addr[index];
|
|
|
+ nca.bytes[6] = 0x1;
|
|
|
+ nca.bytes[7] = 0x1;
|
|
|
+ nd->state = ncsi_dev_state_config_ebf;
|
|
|
+ } else if (nd->state == ncsi_dev_state_config_ebf) {
|
|
|
+ nca.type = NCSI_PKT_CMD_EBF;
|
|
|
+ nca.dwords[0] = nc->caps[NCSI_CAP_BC].cap;
|
|
|
+ nd->state = ncsi_dev_state_config_ecnt;
|
|
|
+#if IS_ENABLED(CONFIG_IPV6)
|
|
|
+ if (ndp->inet6_addr_num > 0 &&
|
|
|
+ (nc->caps[NCSI_CAP_GENERIC].cap &
|
|
|
+ NCSI_CAP_GENERIC_MC))
|
|
|
+ nd->state = ncsi_dev_state_config_egmf;
|
|
|
+ else
|
|
|
+ nd->state = ncsi_dev_state_config_ecnt;
|
|
|
+ } else if (nd->state == ncsi_dev_state_config_egmf) {
|
|
|
+ nca.type = NCSI_PKT_CMD_EGMF;
|
|
|
+ nca.dwords[0] = nc->caps[NCSI_CAP_MC].cap;
|
|
|
+ nd->state = ncsi_dev_state_config_ecnt;
|
|
|
+#endif /* CONFIG_IPV6 */
|
|
|
+ } else if (nd->state == ncsi_dev_state_config_ecnt) {
|
|
|
+ nca.type = NCSI_PKT_CMD_ECNT;
|
|
|
+ nd->state = ncsi_dev_state_config_ec;
|
|
|
+ } else if (nd->state == ncsi_dev_state_config_ec) {
|
|
|
+ /* Enable AEN if it's supported */
|
|
|
+ nca.type = NCSI_PKT_CMD_EC;
|
|
|
+ nd->state = ncsi_dev_state_config_ae;
|
|
|
+ if (!(nc->caps[NCSI_CAP_AEN].cap & NCSI_CAP_AEN_MASK))
|
|
|
+ nd->state = ncsi_dev_state_config_gls;
|
|
|
+ } else if (nd->state == ncsi_dev_state_config_ae) {
|
|
|
+ nca.type = NCSI_PKT_CMD_AE;
|
|
|
+ nca.bytes[0] = 0;
|
|
|
+ nca.dwords[1] = nc->caps[NCSI_CAP_AEN].cap;
|
|
|
+ nd->state = ncsi_dev_state_config_gls;
|
|
|
+ } else if (nd->state == ncsi_dev_state_config_gls) {
|
|
|
+ nca.type = NCSI_PKT_CMD_GLS;
|
|
|
+ nd->state = ncsi_dev_state_config_done;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = ncsi_xmit_cmd(&nca);
|
|
|
+ if (ret)
|
|
|
+ goto error;
|
|
|
+ break;
|
|
|
+ case ncsi_dev_state_config_done:
|
|
|
+ if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1)
|
|
|
+ xchg(&nc->state, NCSI_CHANNEL_ACTIVE);
|
|
|
+ else
|
|
|
+ xchg(&nc->state, NCSI_CHANNEL_INACTIVE);
|
|
|
+
|
|
|
+ ncsi_start_channel_monitor(nc);
|
|
|
+ ncsi_process_next_channel(ndp);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ netdev_warn(dev, "Wrong NCSI state 0x%x in config\n",
|
|
|
+ nd->state);
|
|
|
+ }
|
|
|
+
|
|
|
+ return;
|
|
|
+
|
|
|
+error:
|
|
|
+ ncsi_report_link(ndp, true);
|
|
|
+}
|
|
|
+
|
|
|
+static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp)
|
|
|
+{
|
|
|
+ struct ncsi_package *np;
|
|
|
+ struct ncsi_channel *nc, *found;
|
|
|
+ struct ncsi_channel_mode *ncm;
|
|
|
+ unsigned long flags;
|
|
|
+
|
|
|
+ /* The search is done once an inactive channel with up
|
|
|
+ * link is found.
|
|
|
+ */
|
|
|
+ found = NULL;
|
|
|
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
|
|
|
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
|
|
|
+ if (!list_empty(&nc->link) ||
|
|
|
+ nc->state != NCSI_CHANNEL_INACTIVE)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ if (!found)
|
|
|
+ found = nc;
|
|
|
+
|
|
|
+ ncm = &nc->modes[NCSI_MODE_LINK];
|
|
|
+ if (ncm->data[2] & 0x1) {
|
|
|
+ found = nc;
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!found) {
|
|
|
+ ncsi_report_link(ndp, true);
|
|
|
+ return -ENODEV;
|
|
|
+ }
|
|
|
+
|
|
|
+out:
|
|
|
+ spin_lock_irqsave(&ndp->lock, flags);
|
|
|
+ list_add_tail_rcu(&found->link, &ndp->channel_queue);
|
|
|
+ spin_unlock_irqrestore(&ndp->lock, flags);
|
|
|
+
|
|
|
+ return ncsi_process_next_channel(ndp);
|
|
|
+}
|
|
|
+
|
|
|
+static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp)
|
|
|
+{
|
|
|
+ struct ncsi_package *np;
|
|
|
+ struct ncsi_channel *nc;
|
|
|
+ unsigned int cap;
|
|
|
+
|
|
|
+ /* The hardware arbitration is disabled if any one channel
|
|
|
+ * doesn't support explicitly.
|
|
|
+ */
|
|
|
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
|
|
|
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
|
|
|
+ cap = nc->caps[NCSI_CAP_GENERIC].cap;
|
|
|
+ if (!(cap & NCSI_CAP_GENERIC_HWA) ||
|
|
|
+ (cap & NCSI_CAP_GENERIC_HWA_MASK) !=
|
|
|
+ NCSI_CAP_GENERIC_HWA_SUPPORT) {
|
|
|
+ ndp->flags &= ~NCSI_DEV_HWA;
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ ndp->flags |= NCSI_DEV_HWA;
|
|
|
+ return true;
|
|
|
+}
|
|
|
+
|
|
|
+static int ncsi_enable_hwa(struct ncsi_dev_priv *ndp)
|
|
|
+{
|
|
|
+ struct ncsi_package *np;
|
|
|
+ struct ncsi_channel *nc;
|
|
|
+ unsigned long flags;
|
|
|
+
|
|
|
+ /* Move all available channels to processing queue */
|
|
|
+ spin_lock_irqsave(&ndp->lock, flags);
|
|
|
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
|
|
|
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
|
|
|
+ WARN_ON_ONCE(nc->state != NCSI_CHANNEL_INACTIVE ||
|
|
|
+ !list_empty(&nc->link));
|
|
|
+ ncsi_stop_channel_monitor(nc);
|
|
|
+ list_add_tail_rcu(&nc->link, &ndp->channel_queue);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ spin_unlock_irqrestore(&ndp->lock, flags);
|
|
|
+
|
|
|
+ /* We can have no channels in extremely case */
|
|
|
+ if (list_empty(&ndp->channel_queue)) {
|
|
|
+ ncsi_report_link(ndp, false);
|
|
|
+ return -ENOENT;
|
|
|
+ }
|
|
|
+
|
|
|
+ return ncsi_process_next_channel(ndp);
|
|
|
+}
|
|
|
+
|
|
|
+static void ncsi_probe_channel(struct ncsi_dev_priv *ndp)
|
|
|
+{
|
|
|
+ struct ncsi_dev *nd = &ndp->ndev;
|
|
|
+ struct ncsi_package *np;
|
|
|
+ struct ncsi_channel *nc;
|
|
|
+ struct ncsi_cmd_arg nca;
|
|
|
+ unsigned char index;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ nca.ndp = ndp;
|
|
|
+ nca.driven = true;
|
|
|
+ switch (nd->state) {
|
|
|
+ case ncsi_dev_state_probe:
|
|
|
+ nd->state = ncsi_dev_state_probe_deselect;
|
|
|
+ /* Fall through */
|
|
|
+ case ncsi_dev_state_probe_deselect:
|
|
|
+ ndp->pending_req_num = 8;
|
|
|
+
|
|
|
+ /* Deselect all possible packages */
|
|
|
+ nca.type = NCSI_PKT_CMD_DP;
|
|
|
+ nca.channel = 0x1f;
|
|
|
+ for (index = 0; index < 8; index++) {
|
|
|
+ nca.package = index;
|
|
|
+ ret = ncsi_xmit_cmd(&nca);
|
|
|
+ if (ret)
|
|
|
+ goto error;
|
|
|
+ }
|
|
|
+
|
|
|
+ nd->state = ncsi_dev_state_probe_package;
|
|
|
+ break;
|
|
|
+ case ncsi_dev_state_probe_package:
|
|
|
+ ndp->pending_req_num = 16;
|
|
|
+
|
|
|
+ /* Select all possible packages */
|
|
|
+ nca.type = NCSI_PKT_CMD_SP;
|
|
|
+ nca.bytes[0] = 1;
|
|
|
+ nca.channel = 0x1f;
|
|
|
+ for (index = 0; index < 8; index++) {
|
|
|
+ nca.package = index;
|
|
|
+ ret = ncsi_xmit_cmd(&nca);
|
|
|
+ if (ret)
|
|
|
+ goto error;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Disable all possible packages */
|
|
|
+ nca.type = NCSI_PKT_CMD_DP;
|
|
|
+ for (index = 0; index < 8; index++) {
|
|
|
+ nca.package = index;
|
|
|
+ ret = ncsi_xmit_cmd(&nca);
|
|
|
+ if (ret)
|
|
|
+ goto error;
|
|
|
+ }
|
|
|
+
|
|
|
+ nd->state = ncsi_dev_state_probe_channel;
|
|
|
+ break;
|
|
|
+ case ncsi_dev_state_probe_channel:
|
|
|
+ if (!ndp->active_package)
|
|
|
+ ndp->active_package = list_first_or_null_rcu(
|
|
|
+ &ndp->packages, struct ncsi_package, node);
|
|
|
+ else if (list_is_last(&ndp->active_package->node,
|
|
|
+ &ndp->packages))
|
|
|
+ ndp->active_package = NULL;
|
|
|
+ else
|
|
|
+ ndp->active_package = list_next_entry(
|
|
|
+ ndp->active_package, node);
|
|
|
+
|
|
|
+ /* All available packages and channels are enumerated. The
|
|
|
+ * enumeration happens for once when the NCSI interface is
|
|
|
+ * started. So we need continue to start the interface after
|
|
|
+ * the enumeration.
|
|
|
+ *
|
|
|
+ * We have to choose an active channel before configuring it.
|
|
|
+ * Note that we possibly don't have active channel in extreme
|
|
|
+ * situation.
|
|
|
+ */
|
|
|
+ if (!ndp->active_package) {
|
|
|
+ ndp->flags |= NCSI_DEV_PROBED;
|
|
|
+ if (ncsi_check_hwa(ndp))
|
|
|
+ ncsi_enable_hwa(ndp);
|
|
|
+ else
|
|
|
+ ncsi_choose_active_channel(ndp);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Select the active package */
|
|
|
+ ndp->pending_req_num = 1;
|
|
|
+ nca.type = NCSI_PKT_CMD_SP;
|
|
|
+ nca.bytes[0] = 1;
|
|
|
+ nca.package = ndp->active_package->id;
|
|
|
+ nca.channel = 0x1f;
|
|
|
+ ret = ncsi_xmit_cmd(&nca);
|
|
|
+ if (ret)
|
|
|
+ goto error;
|
|
|
+
|
|
|
+ nd->state = ncsi_dev_state_probe_cis;
|
|
|
+ break;
|
|
|
+ case ncsi_dev_state_probe_cis:
|
|
|
+ ndp->pending_req_num = 32;
|
|
|
+
|
|
|
+ /* Clear initial state */
|
|
|
+ nca.type = NCSI_PKT_CMD_CIS;
|
|
|
+ nca.package = ndp->active_package->id;
|
|
|
+ for (index = 0; index < 0x20; index++) {
|
|
|
+ nca.channel = index;
|
|
|
+ ret = ncsi_xmit_cmd(&nca);
|
|
|
+ if (ret)
|
|
|
+ goto error;
|
|
|
+ }
|
|
|
+
|
|
|
+ nd->state = ncsi_dev_state_probe_gvi;
|
|
|
+ break;
|
|
|
+ case ncsi_dev_state_probe_gvi:
|
|
|
+ case ncsi_dev_state_probe_gc:
|
|
|
+ case ncsi_dev_state_probe_gls:
|
|
|
+ np = ndp->active_package;
|
|
|
+ ndp->pending_req_num = np->channel_num;
|
|
|
+
|
|
|
+ /* Retrieve version, capability or link status */
|
|
|
+ if (nd->state == ncsi_dev_state_probe_gvi)
|
|
|
+ nca.type = NCSI_PKT_CMD_GVI;
|
|
|
+ else if (nd->state == ncsi_dev_state_probe_gc)
|
|
|
+ nca.type = NCSI_PKT_CMD_GC;
|
|
|
+ else
|
|
|
+ nca.type = NCSI_PKT_CMD_GLS;
|
|
|
+
|
|
|
+ nca.package = np->id;
|
|
|
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
|
|
|
+ nca.channel = nc->id;
|
|
|
+ ret = ncsi_xmit_cmd(&nca);
|
|
|
+ if (ret)
|
|
|
+ goto error;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (nd->state == ncsi_dev_state_probe_gvi)
|
|
|
+ nd->state = ncsi_dev_state_probe_gc;
|
|
|
+ else if (nd->state == ncsi_dev_state_probe_gc)
|
|
|
+ nd->state = ncsi_dev_state_probe_gls;
|
|
|
+ else
|
|
|
+ nd->state = ncsi_dev_state_probe_dp;
|
|
|
+ break;
|
|
|
+ case ncsi_dev_state_probe_dp:
|
|
|
+ ndp->pending_req_num = 1;
|
|
|
+
|
|
|
+ /* Deselect the active package */
|
|
|
+ nca.type = NCSI_PKT_CMD_DP;
|
|
|
+ nca.package = ndp->active_package->id;
|
|
|
+ nca.channel = 0x1f;
|
|
|
+ ret = ncsi_xmit_cmd(&nca);
|
|
|
+ if (ret)
|
|
|
+ goto error;
|
|
|
+
|
|
|
+ /* Scan channels in next package */
|
|
|
+ nd->state = ncsi_dev_state_probe_channel;
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n",
|
|
|
+ nd->state);
|
|
|
+ }
|
|
|
+
|
|
|
+ return;
|
|
|
+error:
|
|
|
+ ncsi_report_link(ndp, true);
|
|
|
+}
|
|
|
+
|
|
|
+static void ncsi_dev_work(struct work_struct *work)
|
|
|
+{
|
|
|
+ struct ncsi_dev_priv *ndp = container_of(work,
|
|
|
+ struct ncsi_dev_priv, work);
|
|
|
+ struct ncsi_dev *nd = &ndp->ndev;
|
|
|
+
|
|
|
+ switch (nd->state & ncsi_dev_state_major) {
|
|
|
+ case ncsi_dev_state_probe:
|
|
|
+ ncsi_probe_channel(ndp);
|
|
|
+ break;
|
|
|
+ case ncsi_dev_state_suspend:
|
|
|
+ ncsi_suspend_channel(ndp);
|
|
|
+ break;
|
|
|
+ case ncsi_dev_state_config:
|
|
|
+ ncsi_configure_channel(ndp);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ netdev_warn(nd->dev, "Wrong NCSI state 0x%x in workqueue\n",
|
|
|
+ nd->state);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
|
|
|
+{
|
|
|
+ struct ncsi_channel *nc;
|
|
|
+ int old_state;
|
|
|
+ unsigned long flags;
|
|
|
+
|
|
|
+ spin_lock_irqsave(&ndp->lock, flags);
|
|
|
+ nc = list_first_or_null_rcu(&ndp->channel_queue,
|
|
|
+ struct ncsi_channel, link);
|
|
|
+ if (nc) {
|
|
|
+ old_state = xchg(&nc->state, NCSI_CHANNEL_INVISIBLE);
|
|
|
+ list_del_init(&nc->link);
|
|
|
+ }
|
|
|
+ spin_unlock_irqrestore(&ndp->lock, flags);
|
|
|
+
|
|
|
+ ndp->active_channel = nc;
|
|
|
+ ndp->active_package = nc ? nc->package : NULL;
|
|
|
+ if (!nc) {
|
|
|
+ if (ndp->flags & NCSI_DEV_RESHUFFLE) {
|
|
|
+ ndp->flags &= ~NCSI_DEV_RESHUFFLE;
|
|
|
+ return ncsi_choose_active_channel(ndp);
|
|
|
+ }
|
|
|
+
|
|
|
+ ncsi_report_link(ndp, false);
|
|
|
+ return -ENODEV;
|
|
|
+ }
|
|
|
+
|
|
|
+ switch (old_state) {
|
|
|
+ case NCSI_CHANNEL_INACTIVE:
|
|
|
+ ndp->ndev.state = ncsi_dev_state_config;
|
|
|
+ ncsi_configure_channel(ndp);
|
|
|
+ break;
|
|
|
+ case NCSI_CHANNEL_ACTIVE:
|
|
|
+ ndp->ndev.state = ncsi_dev_state_suspend;
|
|
|
+ ncsi_suspend_channel(ndp);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n",
|
|
|
+ nc->state, nc->package->id, nc->id);
|
|
|
+ ncsi_report_link(ndp, false);
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+#if IS_ENABLED(CONFIG_IPV6)
|
|
|
+static int ncsi_inet6addr_event(struct notifier_block *this,
|
|
|
+ unsigned long event, void *data)
|
|
|
+{
|
|
|
+ struct inet6_ifaddr *ifa = data;
|
|
|
+ struct net_device *dev = ifa->idev->dev;
|
|
|
+ struct ncsi_dev *nd = ncsi_find_dev(dev);
|
|
|
+ struct ncsi_dev_priv *ndp = nd ? TO_NCSI_DEV_PRIV(nd) : NULL;
|
|
|
+ struct ncsi_package *np;
|
|
|
+ struct ncsi_channel *nc;
|
|
|
+ struct ncsi_cmd_arg nca;
|
|
|
+ bool action;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ if (!ndp || (ipv6_addr_type(&ifa->addr) &
|
|
|
+ (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK)))
|
|
|
+ return NOTIFY_OK;
|
|
|
+
|
|
|
+ switch (event) {
|
|
|
+ case NETDEV_UP:
|
|
|
+ action = (++ndp->inet6_addr_num) == 1;
|
|
|
+ nca.type = NCSI_PKT_CMD_EGMF;
|
|
|
+ break;
|
|
|
+ case NETDEV_DOWN:
|
|
|
+ action = (--ndp->inet6_addr_num == 0);
|
|
|
+ nca.type = NCSI_PKT_CMD_DGMF;
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ return NOTIFY_OK;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* We might not have active channel or packages. The IPv6
|
|
|
+ * required multicast will be enabled when active channel
|
|
|
+ * or packages are chosen.
|
|
|
+ */
|
|
|
+ np = ndp->active_package;
|
|
|
+ nc = ndp->active_channel;
|
|
|
+ if (!action || !np || !nc)
|
|
|
+ return NOTIFY_OK;
|
|
|
+
|
|
|
+ /* We needn't enable or disable it if the function isn't supported */
|
|
|
+ if (!(nc->caps[NCSI_CAP_GENERIC].cap & NCSI_CAP_GENERIC_MC))
|
|
|
+ return NOTIFY_OK;
|
|
|
+
|
|
|
+ nca.ndp = ndp;
|
|
|
+ nca.driven = false;
|
|
|
+ nca.package = np->id;
|
|
|
+ nca.channel = nc->id;
|
|
|
+ nca.dwords[0] = nc->caps[NCSI_CAP_MC].cap;
|
|
|
+ ret = ncsi_xmit_cmd(&nca);
|
|
|
+ if (ret) {
|
|
|
+ netdev_warn(dev, "Fail to %s global multicast filter (%d)\n",
|
|
|
+ (event == NETDEV_UP) ? "enable" : "disable", ret);
|
|
|
+ return NOTIFY_DONE;
|
|
|
+ }
|
|
|
+
|
|
|
+ return NOTIFY_OK;
|
|
|
+}
|
|
|
+
|
|
|
+static struct notifier_block ncsi_inet6addr_notifier = {
|
|
|
+ .notifier_call = ncsi_inet6addr_event,
|
|
|
+};
|
|
|
+#endif /* CONFIG_IPV6 */
|
|
|
+
|
|
|
+struct ncsi_dev *ncsi_register_dev(struct net_device *dev,
|
|
|
+ void (*handler)(struct ncsi_dev *ndev))
|
|
|
+{
|
|
|
+ struct ncsi_dev_priv *ndp;
|
|
|
+ struct ncsi_dev *nd;
|
|
|
+ unsigned long flags;
|
|
|
+ int i;
|
|
|
+
|
|
|
+ /* Check if the device has been registered or not */
|
|
|
+ nd = ncsi_find_dev(dev);
|
|
|
+ if (nd)
|
|
|
+ return nd;
|
|
|
+
|
|
|
+ /* Create NCSI device */
|
|
|
+ ndp = kzalloc(sizeof(*ndp), GFP_ATOMIC);
|
|
|
+ if (!ndp)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ nd = &ndp->ndev;
|
|
|
+ nd->state = ncsi_dev_state_registered;
|
|
|
+ nd->dev = dev;
|
|
|
+ nd->handler = handler;
|
|
|
+ ndp->pending_req_num = 0;
|
|
|
+ INIT_LIST_HEAD(&ndp->channel_queue);
|
|
|
+ INIT_WORK(&ndp->work, ncsi_dev_work);
|
|
|
+
|
|
|
+ /* Initialize private NCSI device */
|
|
|
+ spin_lock_init(&ndp->lock);
|
|
|
+ INIT_LIST_HEAD(&ndp->packages);
|
|
|
+ ndp->request_id = 0;
|
|
|
+ for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) {
|
|
|
+ ndp->requests[i].id = i;
|
|
|
+ ndp->requests[i].ndp = ndp;
|
|
|
+ setup_timer(&ndp->requests[i].timer,
|
|
|
+ ncsi_request_timeout,
|
|
|
+ (unsigned long)&ndp->requests[i]);
|
|
|
+ }
|
|
|
+
|
|
|
+ spin_lock_irqsave(&ncsi_dev_lock, flags);
|
|
|
+#if IS_ENABLED(CONFIG_IPV6)
|
|
|
+ ndp->inet6_addr_num = 0;
|
|
|
+ if (list_empty(&ncsi_dev_list))
|
|
|
+ register_inet6addr_notifier(&ncsi_inet6addr_notifier);
|
|
|
+#endif
|
|
|
+ list_add_tail_rcu(&ndp->node, &ncsi_dev_list);
|
|
|
+ spin_unlock_irqrestore(&ncsi_dev_lock, flags);
|
|
|
+
|
|
|
+ /* Register NCSI packet Rx handler */
|
|
|
+ ndp->ptype.type = cpu_to_be16(ETH_P_NCSI);
|
|
|
+ ndp->ptype.func = ncsi_rcv_rsp;
|
|
|
+ ndp->ptype.dev = dev;
|
|
|
+ dev_add_pack(&ndp->ptype);
|
|
|
+
|
|
|
+ return nd;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(ncsi_register_dev);
|
|
|
+
|
|
|
+int ncsi_start_dev(struct ncsi_dev *nd)
|
|
|
+{
|
|
|
+ struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
|
|
|
+ struct ncsi_package *np;
|
|
|
+ struct ncsi_channel *nc;
|
|
|
+ int old_state, ret;
|
|
|
+
|
|
|
+ if (nd->state != ncsi_dev_state_registered &&
|
|
|
+ nd->state != ncsi_dev_state_functional)
|
|
|
+ return -ENOTTY;
|
|
|
+
|
|
|
+ if (!(ndp->flags & NCSI_DEV_PROBED)) {
|
|
|
+ nd->state = ncsi_dev_state_probe;
|
|
|
+ schedule_work(&ndp->work);
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Reset channel's state and start over */
|
|
|
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
|
|
|
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
|
|
|
+ old_state = xchg(&nc->state, NCSI_CHANNEL_INACTIVE);
|
|
|
+ WARN_ON_ONCE(!list_empty(&nc->link) ||
|
|
|
+ old_state == NCSI_CHANNEL_INVISIBLE);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (ndp->flags & NCSI_DEV_HWA)
|
|
|
+ ret = ncsi_enable_hwa(ndp);
|
|
|
+ else
|
|
|
+ ret = ncsi_choose_active_channel(ndp);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(ncsi_start_dev);
|
|
|
+
|
|
|
+void ncsi_unregister_dev(struct ncsi_dev *nd)
|
|
|
+{
|
|
|
+ struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
|
|
|
+ struct ncsi_package *np, *tmp;
|
|
|
+ unsigned long flags;
|
|
|
+
|
|
|
+ dev_remove_pack(&ndp->ptype);
|
|
|
+
|
|
|
+ list_for_each_entry_safe(np, tmp, &ndp->packages, node)
|
|
|
+ ncsi_remove_package(np);
|
|
|
+
|
|
|
+ spin_lock_irqsave(&ncsi_dev_lock, flags);
|
|
|
+ list_del_rcu(&ndp->node);
|
|
|
+#if IS_ENABLED(CONFIG_IPV6)
|
|
|
+ if (list_empty(&ncsi_dev_list))
|
|
|
+ unregister_inet6addr_notifier(&ncsi_inet6addr_notifier);
|
|
|
+#endif
|
|
|
+ spin_unlock_irqrestore(&ncsi_dev_lock, flags);
|
|
|
+
|
|
|
+ kfree(ndp);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(ncsi_unregister_dev);
|
David S. Miller