net/failsafe: add plug-in support

[dpdk.git] / drivers / net / failsafe / failsafe_private.h

diff --git a/drivers/net/failsafe/failsafe_private.h b/drivers/net/failsafe/failsafe_private.h
index 62b5e24..a46d1ea 100644 (file)
--- a/drivers/net/failsafe/failsafe_private.h
+++ b/drivers/net/failsafe/failsafe_private.h
@@ -41,11 +41,15 @@
 #define FAILSAFE_DRIVER_NAME "Fail-safe PMD"
 
 #define PMD_FAILSAFE_MAC_KVARG "mac"
+#define PMD_FAILSAFE_HOTPLUG_POLL_KVARG "hotplug_poll"
 #define PMD_FAILSAFE_PARAM_STRING      \
        "dev(<ifc>),"                   \
-       "mac=mac_addr"                  \
+       "mac=mac_addr,"                 \
+       "hotplug_poll=u64"              \
        ""
 
+#define FAILSAFE_HOTPLUG_DEFAULT_TIMEOUT_MS 2000
+
 #define FAILSAFE_MAX_ETHPORTS 2
 #define FAILSAFE_MAX_ETHADDR 128
 
@@ -103,8 +107,22 @@ struct fs_priv {
        uint32_t mac_addr_pool[FAILSAFE_MAX_ETHADDR];
        /* current capabilities */
        struct rte_eth_dev_info infos;
+       /*
+        * Fail-safe state machine.
+        * This level will be tracking state of the EAL and eth
+        * layer at large as defined by the user application.
+        * It will then steer the sub_devices toward the same
+        * synchronized state.
+        */
+       enum dev_state state;
+       unsigned int pending_alarm:1; /* An alarm is pending */
 };
 
+/* MISC */
+
+int failsafe_hotplug_alarm_install(struct rte_eth_dev *dev);
+int failsafe_hotplug_alarm_cancel(struct rte_eth_dev *dev);
+
 /* RX / TX */
 
 uint16_t failsafe_rx_burst(void *rxq,
@@ -123,10 +141,15 @@ int failsafe_args_count_subdevice(struct rte_eth_dev *dev, const char *params);
 int failsafe_eal_init(struct rte_eth_dev *dev);
 int failsafe_eal_uninit(struct rte_eth_dev *dev);
 
+/* ETH_DEV */
+
+int failsafe_eth_dev_state_sync(struct rte_eth_dev *dev);
+
 /* GLOBALS */
 
 extern const char pmd_failsafe_driver_name[];
 extern const struct eth_dev_ops failsafe_ops;
+extern uint64_t hotplug_poll;
 extern int mac_from_arg;
 
 /* HELPERS */
@@ -205,4 +228,39 @@ fs_find_next(struct rte_eth_dev *dev, uint8_t sid,
        return sid;
 }
 
+static inline void
+fs_switch_dev(struct rte_eth_dev *dev)
+{
+       enum dev_state req_state;
+
+       req_state = PRIV(dev)->state;
+       if (PREFERRED_SUBDEV(dev)->state >= req_state) {
+               if (TX_SUBDEV(dev) != PREFERRED_SUBDEV(dev) &&
+                   (TX_SUBDEV(dev) == NULL ||
+                    (req_state == DEV_STARTED) ||
+                    (TX_SUBDEV(dev) && TX_SUBDEV(dev)->state < DEV_STARTED))) {
+                       DEBUG("Switching tx_dev to preferred sub_device");
+                       PRIV(dev)->subs_tx = 0;
+               }
+       } else if ((TX_SUBDEV(dev) && TX_SUBDEV(dev)->state < req_state) ||
+                  TX_SUBDEV(dev) == NULL) {
+               struct sub_device *sdev;
+               uint8_t i;
+
+               /* Using acceptable device */
+               FOREACH_SUBDEV_STATE(sdev, i, dev, req_state) {
+                       DEBUG("Switching tx_dev to sub_device %d",
+                             i);
+                       PRIV(dev)->subs_tx = i;
+                       break;
+               }
+       } else if (TX_SUBDEV(dev) && TX_SUBDEV(dev)->state < req_state) {
+               DEBUG("No device ready, deactivating tx_dev");
+               PRIV(dev)->subs_tx = PRIV(dev)->subs_tail;
+       } else {
+               return;
+       }
+       rte_wmb();
+}
+
 #endif /* _RTE_ETH_FAILSAFE_PRIVATE_H_ */