[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, 19 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_dbg.h b/drivers/scsi/qla2xxx/qla_dbg.h
index a50ecf0b7c84..524598afc81c 100644
--- a/drivers/scsi/qla2xxx/qla_dbg.h
+++ b/drivers/scsi/qla2xxx/qla_dbg.h
@@ -256,6 +256,25 @@ struct qla25xx_fw_dump {
 #define EFT_BYTES_PER_BUFFER    0x4000
 #define EFT_SIZE                ((EFT_BYTES_PER_BUFFER) * (EFT_NUM_BUFFERS))
 
+#define FCE_NUM_BUFFERS         64
+#define FCE_BYTES_PER_BUFFER    0x400
+#define FCE_SIZE                ((FCE_BYTES_PER_BUFFER) * (FCE_NUM_BUFFERS))
+#define fce_calc_size(b)        ((FCE_BYTES_PER_BUFFER) * (b))
+
+struct qla2xxx_fce_chain {
+        uint32_t type;
+        uint32_t chain_size;
+
+        uint32_t size;
+        uint32_t addr_l;
+        uint32_t addr_h;
+        uint32_t eregs[8];
+};
+
+#define DUMP_CHAIN_VARIANT      0x80000000
+#define DUMP_CHAIN_FCE          0x7FFFFAF0
+#define DUMP_CHAIN_LAST         0x80000000
+
 struct qla2xxx_fw_dump {
         uint8_t signature[4];
         uint32_t version;