From: Ariel Elior <Ariel.Elior@cavium.com>
Date: Wed, 28 Nov 2018 18:16:06 +0200
Subject: qed: Expose the doorbell overflow recovery mechanism to the protocol
 drivers
Patch-mainline: v5.0-rc1
Git-commit: 0e1f10447e2aa79ba7d8960e5d0ed3cf2ea8356e
References: bsc#1104393 FATE#325891 bsc#1104389 FATE#325890

Most of the doorbelling entities are outside of the core module.
L2 queues, Roce queues, iscsi and fcoe all need to register.
Make the APIs available for these drivers.

Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Tomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/qlogic/qed/qed_main.c |    2 ++
 include/linux/qed/qed_if.h                 |   27 +++++++++++++++++++++++++++
 2 files changed, 29 insertions(+)

--- a/drivers/net/ethernet/qlogic/qed/qed_main.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_main.c
@@ -2384,6 +2384,8 @@ const struct qed_common_ops qed_common_o
 	.update_mac = &qed_update_mac,
 	.update_mtu = &qed_update_mtu,
 	.update_wol = &qed_update_wol,
+	.db_recovery_add = &qed_db_recovery_add,
+	.db_recovery_del = &qed_db_recovery_del,
 	.read_module_eeprom = &qed_read_module_eeprom,
 };
 
--- a/include/linux/qed/qed_if.h
+++ b/include/linux/qed/qed_if.h
@@ -1029,6 +1029,33 @@ struct qed_common_ops {
  */
 	int (*set_led)(struct qed_dev *cdev,
 		       enum qed_led_mode mode);
+/**
+ * @brief db_recovery_add - add doorbell information to the doorbell
+ * recovery mechanism.
+ *
+ * @param cdev
+ * @param db_addr - doorbell address
+ * @param db_data - address of where db_data is stored
+ * @param db_is_32b - doorbell is 32b pr 64b
+ * @param db_is_user - doorbell recovery addresses are user or kernel space
+ */
+	int (*db_recovery_add)(struct qed_dev *cdev,
+			       void __iomem *db_addr,
+			       void *db_data,
+			       enum qed_db_rec_width db_width,
+			       enum qed_db_rec_space db_space);
+
+/**
+ * @brief db_recovery_del - remove doorbell information from the doorbell
+ * recovery mechanism. db_data serves as key (db_addr is not unique).
+ *
+ * @param cdev
+ * @param db_addr - doorbell address
+ * @param db_data - address where db_data is stored. Serves as key for the
+ *		    entry to delete.
+ */
+	int (*db_recovery_del)(struct qed_dev *cdev,
+			       void __iomem *db_addr, void *db_data);
 
 /**
  * @brief update_drv_state - API to inform the change in the driver state.