[SCSI] zfcp: Track fabric and channel latencies provided by FCP adapter

[linux-2.6] / drivers / s390 / scsi / zfcp_def.h

diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index bda8c77b22daf6160235f3199b93c9953c4b4d51..306fcd0cae310bb8e25778de2d410dce50157787 100644 (file)
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -708,6 +708,24 @@ struct zfcp_erp_action {
        struct timer_list timer;
 };
 
+struct fsf_latency_record {
+       u32 min;
+       u32 max;
+       u64 sum;
+};
+
+struct latency_cont {
+       struct fsf_latency_record channel;
+       struct fsf_latency_record fabric;
+       u64 counter;
+};
+
+struct zfcp_latencies {
+       struct latency_cont read;
+       struct latency_cont write;
+       struct latency_cont cmd;
+       spinlock_t lock;
+};
 
 struct zfcp_adapter {
        struct list_head        list;              /* list of adapters */
@@ -723,6 +741,7 @@ struct zfcp_adapter {
        u32                     adapter_features;  /* FCP channel features */
        u32                     connection_features; /* host connection features */
         u32                    hardware_version;  /* of FCP channel */
+       u16                     timer_ticks;       /* time int for a tick */
        struct Scsi_Host        *scsi_host;        /* Pointer to mid-layer */
        struct list_head        port_list_head;    /* remote port list */
        struct list_head        port_remove_lh;    /* head of ports to be
@@ -822,6 +841,7 @@ struct zfcp_unit {
         struct scsi_device     *device;        /* scsi device struct pointer */
        struct zfcp_erp_action erp_action;     /* pending error recovery */
         atomic_t               erp_counter;
+       struct zfcp_latencies   latencies;
 };
 
 /* FSF request */