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authorSamuel Mendoza-Jonas <sam@mendozajonas.com>2018-11-16 07:51:59 +0300
committerDavid S. Miller <davem@davemloft.net>2018-11-18 08:09:49 +0300
commit8d951a75d022d94a05f5fa74217670a981e8302d (patch)
treed360d9898e404a423779ba2b3ced1a5801515997 /net/ncsi/ncsi-aen.c
parent2878a2cfe57a5db21844801cf502fe535a3134b2 (diff)
downloadlinux-8d951a75d022d94a05f5fa74217670a981e8302d.tar.xz
net/ncsi: Configure multi-package, multi-channel modes with failover
This patch extends the ncsi-netlink interface with two new commands and three new attributes to configure multiple packages and/or channels at once, and configure specific failover modes. NCSI_CMD_SET_PACKAGE mask and NCSI_CMD_SET_CHANNEL_MASK set a whitelist of packages or channels allowed to be configured with the NCSI_ATTR_PACKAGE_MASK and NCSI_ATTR_CHANNEL_MASK attributes respectively. If one of these whitelists is set only packages or channels matching the whitelist are considered for the channel queue in ncsi_choose_active_channel(). These commands may also use the NCSI_ATTR_MULTI_FLAG to signal that multiple packages or channels may be configured simultaneously. NCSI hardware arbitration (HWA) must be available in order to enable multi-package mode. Multi-channel mode is always available. If the NCSI_ATTR_CHANNEL_ID attribute is present in the NCSI_CMD_SET_CHANNEL_MASK command the it sets the preferred channel as with the NCSI_CMD_SET_INTERFACE command. The combination of preferred channel and channel whitelist defines a primary channel and the allowed failover channels. If the NCSI_ATTR_MULTI_FLAG attribute is also present then the preferred channel is configured for Tx/Rx and the other channels are enabled only for Rx. Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ncsi/ncsi-aen.c')
-rw-r--r--net/ncsi/ncsi-aen.c63
1 files changed, 51 insertions, 12 deletions
diff --git a/net/ncsi/ncsi-aen.c b/net/ncsi/ncsi-aen.c
index 57f77e5d381a..26d67e27551f 100644
--- a/net/ncsi/ncsi-aen.c
+++ b/net/ncsi/ncsi-aen.c
@@ -50,14 +50,15 @@ static int ncsi_validate_aen_pkt(struct ncsi_aen_pkt_hdr *h,
static int ncsi_aen_handler_lsc(struct ncsi_dev_priv *ndp,
struct ncsi_aen_pkt_hdr *h)
{
- struct ncsi_aen_lsc_pkt *lsc;
- struct ncsi_channel *nc;
+ struct ncsi_channel *nc, *tmp;
struct ncsi_channel_mode *ncm;
- bool chained;
- int state;
unsigned long old_data, data;
- unsigned long flags;
+ struct ncsi_aen_lsc_pkt *lsc;
+ struct ncsi_package *np;
bool had_link, has_link;
+ unsigned long flags;
+ bool chained;
+ int state;
/* Find the NCSI channel */
ncsi_find_package_and_channel(ndp, h->common.channel, NULL, &nc);
@@ -92,14 +93,52 @@ static int ncsi_aen_handler_lsc(struct ncsi_dev_priv *ndp,
if ((had_link == has_link) || chained)
return 0;
- if (had_link)
- ndp->flags |= NCSI_DEV_RESHUFFLE;
- ncsi_stop_channel_monitor(nc);
- spin_lock_irqsave(&ndp->lock, flags);
- list_add_tail_rcu(&nc->link, &ndp->channel_queue);
- spin_unlock_irqrestore(&ndp->lock, flags);
+ if (!ndp->multi_package && !nc->package->multi_channel) {
+ if (had_link) {
+ ndp->flags |= NCSI_DEV_RESHUFFLE;
+ ncsi_stop_channel_monitor(nc);
+ spin_lock_irqsave(&ndp->lock, flags);
+ list_add_tail_rcu(&nc->link, &ndp->channel_queue);
+ spin_unlock_irqrestore(&ndp->lock, flags);
+ return ncsi_process_next_channel(ndp);
+ }
+ /* Configured channel came up */
+ return 0;
+ }
- return ncsi_process_next_channel(ndp);
+ if (had_link) {
+ ncm = &nc->modes[NCSI_MODE_TX_ENABLE];
+ if (ncsi_channel_is_last(ndp, nc)) {
+ /* No channels left, reconfigure */
+ return ncsi_reset_dev(&ndp->ndev);
+ } else if (ncm->enable) {
+ /* Need to failover Tx channel */
+ ncsi_update_tx_channel(ndp, nc->package, nc, NULL);
+ }
+ } else if (has_link && nc->package->preferred_channel == nc) {
+ /* Return Tx to preferred channel */
+ ncsi_update_tx_channel(ndp, nc->package, NULL, nc);
+ } else if (has_link) {
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
+ NCSI_FOR_EACH_CHANNEL(np, tmp) {
+ /* Enable Tx on this channel if the current Tx
+ * channel is down.
+ */
+ ncm = &tmp->modes[NCSI_MODE_TX_ENABLE];
+ if (ncm->enable &&
+ !ncsi_channel_has_link(tmp)) {
+ ncsi_update_tx_channel(ndp, nc->package,
+ tmp, nc);
+ break;
+ }
+ }
+ }
+ }
+
+ /* Leave configured channels active in a multi-channel scenario so
+ * AEN events are still received.
+ */
+ return 0;
}
static int ncsi_aen_handler_cr(struct ncsi_dev_priv *ndp,