[SCSI] qla2xxx: Add Fibre Channel Event (FCE) tracing support.

FCE support enables the firmware to record FC extended link
services and basic link services frames which have been
transmitted and received by the ISP.  This allows for a limited
view of the FC traffic through the ISP without using a FC
analyzer.  This can be useful in situations where a physical
connection to the FC bus is not possible.

The driver exports this information in two ways -- first, via a
debugfs node exported for all supported ISPs under:

	<debugfs_mount_point>/qla2xxx/qla2xxx_<host_no>/fce

where a read of the 'fce' file will provide a snapshot of the
firmware's FCE buffer; and finally, the FCE buffer will be
extracted during a firmware-dump scenario.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 3f934bdce6ae..6f129da37589 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -2156,6 +2156,7 @@ typedef struct scsi_qla_host {
                 uint32_t        gpsc_supported          :1;
                 uint32_t        vsan_enabled            :1;
                 uint32_t        npiv_supported          :1;
+                uint32_t        fce_enabled             :1;
         } flags;
 
         atomic_t        loop_state;
@@ -2449,6 +2450,15 @@ typedef struct scsi_qla_host {
         dma_addr_t      eft_dma;
         void            *eft;
 
+        struct dentry *dfs_dir;
+        struct dentry *dfs_fce;
+        dma_addr_t      fce_dma;
+        void            *fce;
+        uint32_t        fce_bufs;
+        uint16_t        fce_mb[8];
+        uint64_t        fce_wr, fce_rd;
+        struct mutex    fce_mutex;
+
         uint8_t         host_str[16];
         uint32_t        pci_attr;
         uint16_t        chip_revision;