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authorLogan Gunthorpe <logang@deltatee.com>2017-08-03 12:19:43 -0600
committerJon Mason <jdmason@kudzu.us>2017-11-18 20:37:11 -0500
commit48c302dc8f3acc1b0ef56a28569bc6a35b9b0e60 (patch)
tree5fd88d18529d648ca29527592fa1e51004f17cc0 /include/linux
parentc082b04c9d40f69dacd93a151db114299f5de6eb (diff)
NTB: switchtec: Add link event notifier callback
In order for the Switchtec NTB code to handle link change events we create a notifier callback in the switchtec code which gets called whenever an appropriate event interrupt occurs. In order to preserve userspace's ability to follow these events, we compare the event count with a stored copy from last time we checked. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Stephen Bates <sbates@raithlin.com> Reviewed-by: Kurt Schwemmer <kurt.schwemmer@microsemi.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/switchtec.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/switchtec.h b/include/linux/switchtec.h
index 9c2be7631257..d8159944f013 100644
--- a/include/linux/switchtec.h
+++ b/include/linux/switchtec.h
@@ -353,6 +353,10 @@ struct switchtec_dev {
wait_queue_head_t event_wq;
atomic_t event_cnt;
+
+ struct work_struct link_event_work;
+ void (*link_notifier)(struct switchtec_dev *stdev);
+ u8 link_event_count[SWITCHTEC_MAX_PFF_CSR];
};
static inline struct switchtec_dev *to_stdev(struct device *dev)