bna: IOC Event Notification Enhancement

Change details:
 - Replace IOC HB failure event notification with a more generic mechanism
   that is capable of sending enble, disable, and failed events to registered
   modules. As a result, cee  module event handling callback bfa_cee_hbfail()
   is replaced with bfa_cee_notify() so that it can receive and handle
   different events from IOC.

Signed-off-by: Rasesh Mody <rmody@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bna/bfa_cee.c

@@ -223,44 +223,56 @@ bfa_cee_isr(void *cbarg, struct bfi_mbmsg *m)
 }
 
 /**
- * bfa_cee_hbfail()
+ * bfa_cee_notify()
  *
  * @brief CEE module heart-beat failure handler.
+ * @brief CEE module IOC event handler.
  *
- * @param[in] Pointer to the CEE module data structure.
+ * @param[in] IOC event type
  *
  * @return void
  */
 
 static void
-bfa_cee_hbfail(void *arg)
+bfa_cee_notify(void *arg, enum bfa_ioc_event event)
 {
 	struct bfa_cee *cee;
-	cee = arg;
+	cee = (struct bfa_cee *) arg;
 
-	if (cee->get_attr_pending == true) {
-		cee->get_attr_status = BFA_STATUS_FAILED;
-		cee->get_attr_pending  = false;
-		if (cee->cbfn.get_attr_cbfn) {
-			cee->cbfn.get_attr_cbfn(cee->cbfn.get_attr_cbarg,
-			    BFA_STATUS_FAILED);
+	switch (event) {
+	case BFA_IOC_E_DISABLED:
+	case BFA_IOC_E_FAILED:
+		if (cee->get_attr_pending == true) {
+			cee->get_attr_status = BFA_STATUS_FAILED;
+			cee->get_attr_pending  = false;
+			if (cee->cbfn.get_attr_cbfn) {
+				cee->cbfn.get_attr_cbfn(
+					cee->cbfn.get_attr_cbarg,
+					BFA_STATUS_FAILED);
+			}
 		}
-	}
-	if (cee->get_stats_pending == true) {
-		cee->get_stats_status = BFA_STATUS_FAILED;
-		cee->get_stats_pending  = false;
-		if (cee->cbfn.get_stats_cbfn) {
-			cee->cbfn.get_stats_cbfn(cee->cbfn.get_stats_cbarg,
-			    BFA_STATUS_FAILED);
+		if (cee->get_stats_pending == true) {
+			cee->get_stats_status = BFA_STATUS_FAILED;
+			cee->get_stats_pending  = false;
+			if (cee->cbfn.get_stats_cbfn) {
+				cee->cbfn.get_stats_cbfn(
+					cee->cbfn.get_stats_cbarg,
+					BFA_STATUS_FAILED);
+			}
 		}
-	}
-	if (cee->reset_stats_pending == true) {
-		cee->reset_stats_status = BFA_STATUS_FAILED;
-		cee->reset_stats_pending  = false;
-		if (cee->cbfn.reset_stats_cbfn) {
-			cee->cbfn.reset_stats_cbfn(cee->cbfn.reset_stats_cbarg,
-			    BFA_STATUS_FAILED);
+		if (cee->reset_stats_pending == true) {
+			cee->reset_stats_status = BFA_STATUS_FAILED;
+			cee->reset_stats_pending  = false;
+			if (cee->cbfn.reset_stats_cbfn) {
+				cee->cbfn.reset_stats_cbfn(
+					cee->cbfn.reset_stats_cbarg,
+					BFA_STATUS_FAILED);
+			}
 		}
+		break;
+
+	default:
+		break;
 	}
 }
 
@@ -286,6 +298,7 @@ bfa_nw_cee_attach(struct bfa_cee *cee, struct bfa_ioc *ioc,
 	cee->ioc = ioc;
 
 	bfa_nw_ioc_mbox_regisr(cee->ioc, BFI_MC_CEE, bfa_cee_isr, cee);
-	bfa_ioc_hbfail_init(&cee->hbfail, bfa_cee_hbfail, cee);
-	bfa_nw_ioc_hbfail_register(cee->ioc, &cee->hbfail);
+	bfa_q_qe_init(&cee->ioc_notify);
+	bfa_ioc_notify_init(&cee->ioc_notify, bfa_cee_notify, cee);
+	bfa_nw_ioc_notify_register(cee->ioc, &cee->ioc_notify);
 }

drivers/net/bna/bfa_cee.h

@@ -25,7 +25,6 @@
 typedef void (*bfa_cee_get_attr_cbfn_t) (void *dev, enum bfa_status status);
 typedef void (*bfa_cee_get_stats_cbfn_t) (void *dev, enum bfa_status status);
 typedef void (*bfa_cee_reset_stats_cbfn_t) (void *dev, enum bfa_status status);
-typedef void (*bfa_cee_hbfail_cbfn_t) (void *dev, enum bfa_status status);
 
 struct bfa_cee_cbfn {
 	bfa_cee_get_attr_cbfn_t    get_attr_cbfn;
@@ -45,7 +44,7 @@ struct bfa_cee {
 	enum bfa_status get_stats_status;
 	enum bfa_status reset_stats_status;
 	struct bfa_cee_cbfn cbfn;
-	struct bfa_ioc_hbfail_notify hbfail;
+	struct bfa_ioc_notify ioc_notify;
 	struct bfa_cee_attr *attr;
 	struct bfa_cee_stats *stats;
 	struct bfa_dma attr_dma;

drivers/net/bna/bfa_ioc.c

@@ -71,6 +71,7 @@ static void bfa_ioc_mbox_poll(struct bfa_ioc *ioc);
 static void bfa_ioc_mbox_hbfail(struct bfa_ioc *ioc);
 static void bfa_ioc_recover(struct bfa_ioc *ioc);
 static void bfa_ioc_check_attr_wwns(struct bfa_ioc *ioc);
+static void bfa_ioc_event_notify(struct bfa_ioc *, enum bfa_ioc_event);
 static void bfa_ioc_disable_comp(struct bfa_ioc *ioc);
 static void bfa_ioc_lpu_stop(struct bfa_ioc *ioc);
 static void bfa_ioc_fail_notify(struct bfa_ioc *ioc);
@@ -1123,23 +1124,28 @@ bfa_iocpf_sm_fail(struct bfa_iocpf *iocpf, enum iocpf_event event)
  * BFA IOC private functions
  */
 
+/**
+ * Notify common modules registered for notification.
+ */
 static void
-bfa_ioc_disable_comp(struct bfa_ioc *ioc)
+bfa_ioc_event_notify(struct bfa_ioc *ioc, enum bfa_ioc_event event)
 {
+	struct bfa_ioc_notify *notify;
 	struct list_head			*qe;
-	struct bfa_ioc_hbfail_notify *notify;
 
-	ioc->cbfn->disable_cbfn(ioc->bfa);
-
-	/**
-	 * Notify common modules registered for notification.
-	 */
-	list_for_each(qe, &ioc->hb_notify_q) {
-		notify = (struct bfa_ioc_hbfail_notify *) qe;
-		notify->cbfn(notify->cbarg);
+	list_for_each(qe, &ioc->notify_q) {
+		notify = (struct bfa_ioc_notify *)qe;
+		notify->cbfn(notify->cbarg, event);
 	}
 }
 
+static void
+bfa_ioc_disable_comp(struct bfa_ioc *ioc)
+{
+	ioc->cbfn->disable_cbfn(ioc->bfa);
+	bfa_ioc_event_notify(ioc, BFA_IOC_E_DISABLED);
+}
+
 bool
 bfa_nw_ioc_sem_get(void __iomem *sem_reg)
 {
@@ -1650,17 +1656,11 @@ bfa_ioc_mbox_hbfail(struct bfa_ioc *ioc)
 static void
 bfa_ioc_fail_notify(struct bfa_ioc *ioc)
 {
-	struct list_head		*qe;
-	struct bfa_ioc_hbfail_notify	*notify;
-
 	/**
 	 * Notify driver and common modules registered for notification.
 	 */
 	ioc->cbfn->hbfail_cbfn(ioc->bfa);
-	list_for_each(qe, &ioc->hb_notify_q) {
-		notify = (struct bfa_ioc_hbfail_notify *) qe;
-		notify->cbfn(notify->cbarg);
-	}
+	bfa_ioc_event_notify(ioc, BFA_IOC_E_FAILED);
 }
 
 static void
@@ -1839,7 +1839,7 @@ bfa_nw_ioc_attach(struct bfa_ioc *ioc, void *bfa, struct bfa_ioc_cbfn *cbfn)
 	ioc->iocpf.ioc  = ioc;
 
 	bfa_ioc_mbox_attach(ioc);
-	INIT_LIST_HEAD(&ioc->hb_notify_q);
+	INIT_LIST_HEAD(&ioc->notify_q);
 
 	bfa_fsm_set_state(ioc, bfa_ioc_sm_uninit);
 	bfa_fsm_send_event(ioc, IOC_E_RESET);
@@ -1969,6 +1969,8 @@ bfa_nw_ioc_mbox_queue(struct bfa_ioc *ioc, struct bfa_mbox_cmd *cmd)
 	 * mailbox is free -- queue command to firmware
 	 */
 	bfa_ioc_mbox_send(ioc, cmd->msg, sizeof(cmd->msg));
+
+	return;
 }
 
 /**
@@ -2004,15 +2006,25 @@ bfa_nw_ioc_error_isr(struct bfa_ioc *ioc)
 	bfa_fsm_send_event(ioc, IOC_E_HWERROR);
 }
 
+/**
+ * return true if IOC is disabled
+ */
+bool
+bfa_nw_ioc_is_disabled(struct bfa_ioc *ioc)
+{
+	return bfa_fsm_cmp_state(ioc, bfa_ioc_sm_disabling) ||
+		bfa_fsm_cmp_state(ioc, bfa_ioc_sm_disabled);
+}
+
 /**
  * Add to IOC heartbeat failure notification queue. To be used by common
  * modules such as cee, port, diag.
  */
 void
-bfa_nw_ioc_hbfail_register(struct bfa_ioc *ioc,
-			struct bfa_ioc_hbfail_notify *notify)
+bfa_nw_ioc_notify_register(struct bfa_ioc *ioc,
+			struct bfa_ioc_notify *notify)
 {
-	list_add_tail(&notify->qe, &ioc->hb_notify_q);
+	list_add_tail(&notify->qe, &ioc->notify_q);
 }
 
 #define BFA_MFG_NAME "Brocade"

drivers/net/bna/bfa_ioc.h

@@ -97,9 +97,12 @@ struct bfa_ioc_regs {
 /**
  * IOC Mailbox structures
  */
+typedef void (*bfa_mbox_cmd_cbfn_t)(void *cbarg);
 struct bfa_mbox_cmd {
 	struct list_head	qe;
-	u32			msg[BFI_IOC_MSGSZ];
+	bfa_mbox_cmd_cbfn_t     cbfn;
+	void		    *cbarg;
+	u32     msg[BFI_IOC_MSGSZ];
 };
 
 /**
@@ -129,6 +132,23 @@ struct bfa_ioc_cbfn {
 	bfa_ioc_reset_cbfn_t	reset_cbfn;
 };
 
+/**
+ * IOC event notification mechanism.
+ */
+enum bfa_ioc_event {
+	BFA_IOC_E_ENABLED	= 1,
+	BFA_IOC_E_DISABLED	= 2,
+	BFA_IOC_E_FAILED	= 3,
+};
+
+typedef void (*bfa_ioc_notify_cbfn_t)(void *, enum bfa_ioc_event);
+
+struct bfa_ioc_notify {
+	struct list_head	qe;
+	bfa_ioc_notify_cbfn_t	cbfn;
+	void			*cbarg;
+};
+
 /**
  * Heartbeat failure notification queue element.
  */
@@ -141,7 +161,7 @@ struct bfa_ioc_hbfail_notify {
 /**
  * Initialize a heartbeat failure notification structure
  */
-#define bfa_ioc_hbfail_init(__notify, __cbfn, __cbarg) do {	\
+#define bfa_ioc_notify_init(__notify, __cbfn, __cbarg) do {	\
 	(__notify)->cbfn = (__cbfn);				\
 	(__notify)->cbarg = (__cbarg);				\
 } while (0)
@@ -162,7 +182,7 @@ struct bfa_ioc {
 	struct timer_list	sem_timer;
 	struct timer_list	hb_timer;
 	u32			hb_count;
-	struct list_head	hb_notify_q;
+	struct list_head	notify_q;
 	void			*dbg_fwsave;
 	int			dbg_fwsave_len;
 	bool			dbg_fwsave_once;
@@ -263,9 +283,10 @@ void bfa_nw_ioc_enable(struct bfa_ioc *ioc);
 void bfa_nw_ioc_disable(struct bfa_ioc *ioc);
 
 void bfa_nw_ioc_error_isr(struct bfa_ioc *ioc);
+bool bfa_nw_ioc_is_disabled(struct bfa_ioc *ioc);
 void bfa_nw_ioc_get_attr(struct bfa_ioc *ioc, struct bfa_ioc_attr *ioc_attr);
-void bfa_nw_ioc_hbfail_register(struct bfa_ioc *ioc,
-	struct bfa_ioc_hbfail_notify *notify);
+void bfa_nw_ioc_notify_register(struct bfa_ioc *ioc,
+	struct bfa_ioc_notify *notify);
 bool bfa_nw_ioc_sem_get(void __iomem *sem_reg);
 void bfa_nw_ioc_sem_release(void __iomem *sem_reg);
 void bfa_nw_ioc_hw_sem_release(struct bfa_ioc *ioc);