net/ncsi: Package and channel management
This manages NCSI packages and channels:
* The available packages and channels are enumerated in the first
time of calling ncsi_start_dev(). The channels' capabilities are
probed in the meanwhile. The NCSI network topology won't change
until the NCSI device is destroyed.
* There in a queue in every NCSI device. The element in the queue,
channel, is waiting for configuration (bringup) or suspending
(teardown). The channel's state (inactive/active) indicates the
futher action (configuration or suspending) will be applied on the
channel. Another channel's state (invisible) means the requested
action is being applied.
* The hardware arbitration will be enabled if all available packages
and channels support it. All available channels try to provide
service when hardware arbitration is enabled. Otherwise, one channel
is selected as the active one at once.
* When channel is in active state, meaning it's providing service, a
timer started to retrieve the channe's link status. If the channel's
link status fails to be updated in the determined period, the channel
is going to be reconfigured. It's the error handling implementation
as defined in NCSI spec.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Acked-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ncsi/internal.h b/net/ncsi/internal.h
index bd000c9..38fc95a 100644
--- a/net/ncsi/internal.h
+++ b/net/ncsi/internal.h
@@ -178,6 +178,7 @@
int state;
#define NCSI_CHANNEL_INACTIVE 1
#define NCSI_CHANNEL_ACTIVE 2
+#define NCSI_CHANNEL_INVISIBLE 3
spinlock_t lock; /* Protect filters etc */
struct ncsi_package *package;
struct ncsi_channel_version version;
@@ -185,7 +186,11 @@
struct ncsi_channel_mode modes[NCSI_MODE_MAX];
struct ncsi_channel_filter *filters[NCSI_FILTER_MAX];
struct ncsi_channel_stats stats;
+ struct timer_list timer; /* Link monitor timer */
+ bool enabled; /* Timer is enabled */
+ unsigned int timeout; /* Times of timeout */
struct list_head node;
+ struct list_head link;
};
struct ncsi_package {
@@ -209,14 +214,56 @@
bool enabled; /* Time has been enabled or not */
};
+enum {
+ ncsi_dev_state_major = 0xff00,
+ ncsi_dev_state_minor = 0x00ff,
+ ncsi_dev_state_probe_deselect = 0x0201,
+ ncsi_dev_state_probe_package,
+ ncsi_dev_state_probe_channel,
+ ncsi_dev_state_probe_cis,
+ ncsi_dev_state_probe_gvi,
+ ncsi_dev_state_probe_gc,
+ ncsi_dev_state_probe_gls,
+ ncsi_dev_state_probe_dp,
+ ncsi_dev_state_config_sp = 0x0301,
+ ncsi_dev_state_config_cis,
+ ncsi_dev_state_config_sma,
+ ncsi_dev_state_config_ebf,
+#if IS_ENABLED(CONFIG_IPV6)
+ ncsi_dev_state_config_egmf,
+#endif
+ ncsi_dev_state_config_ecnt,
+ ncsi_dev_state_config_ec,
+ ncsi_dev_state_config_ae,
+ ncsi_dev_state_config_gls,
+ ncsi_dev_state_config_done,
+ ncsi_dev_state_suspend_select = 0x0401,
+ ncsi_dev_state_suspend_dcnt,
+ ncsi_dev_state_suspend_dc,
+ ncsi_dev_state_suspend_deselect,
+ ncsi_dev_state_suspend_done
+};
+
struct ncsi_dev_priv {
struct ncsi_dev ndev; /* Associated NCSI device */
unsigned int flags; /* NCSI device flags */
+#define NCSI_DEV_PROBED 1 /* Finalized NCSI topology */
+#define NCSI_DEV_HWA 2 /* Enabled HW arbitration */
+#define NCSI_DEV_RESHUFFLE 4
spinlock_t lock; /* Protect the NCSI device */
+#if IS_ENABLED(CONFIG_IPV6)
+ unsigned int inet6_addr_num; /* Number of IPv6 addresses */
+#endif
unsigned int package_num; /* Number of packages */
struct list_head packages; /* List of packages */
struct ncsi_request requests[256]; /* Request table */
unsigned int request_id; /* Last used request ID */
+ unsigned int pending_req_num; /* Number of pending requests */
+ struct ncsi_package *active_package; /* Currently handled package */
+ struct ncsi_channel *active_channel; /* Currently handled channel */
+ struct list_head channel_queue; /* Config queue of channels */
+ struct work_struct work; /* For channel management */
+ struct packet_type ptype; /* NCSI packet Rx handler */
struct list_head node; /* Form NCSI device list */
};
@@ -251,6 +298,8 @@
int ncsi_find_filter(struct ncsi_channel *nc, int table, void *data);
int ncsi_add_filter(struct ncsi_channel *nc, int table, void *data);
int ncsi_remove_filter(struct ncsi_channel *nc, int table, int index);
+void ncsi_start_channel_monitor(struct ncsi_channel *nc);
+void ncsi_stop_channel_monitor(struct ncsi_channel *nc);
struct ncsi_channel *ncsi_find_channel(struct ncsi_package *np,
unsigned char id);
struct ncsi_channel *ncsi_add_channel(struct ncsi_package *np,
@@ -267,6 +316,7 @@
struct ncsi_request *ncsi_alloc_request(struct ncsi_dev_priv *ndp, bool driven);
void ncsi_free_request(struct ncsi_request *nr);
struct ncsi_dev *ncsi_find_dev(struct net_device *dev);
+int ncsi_process_next_channel(struct ncsi_dev_priv *ndp);
/* Packet handlers */
u32 ncsi_calculate_checksum(unsigned char *data, int len);