[SCSI] qla2xxx: Honour "Extended BB credits" bit for CNAs.
We now enable/disable "Additional Receive Credits" in f/w based on nvram
parameter "Extended_BB_Credits" bit (i.e. Enhanced-Features: at offset 0x196).
This is applicable only for GEN2 CNAs.
Signed-off-by: Santosh Vernekar <santosh.vernekar@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 6e53bdb..3ba9a2b 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -339,6 +339,7 @@
return rval;
}
+#define EXTENDED_BB_CREDITS BIT_0
/*
* qla2x00_execute_fw
* Start adapter firmware.
@@ -371,7 +372,12 @@
mcp->mb[1] = MSW(risc_addr);
mcp->mb[2] = LSW(risc_addr);
mcp->mb[3] = 0;
- mcp->mb[4] = 0;
+ if (IS_QLA81XX(ha)) {
+ struct nvram_81xx *nv = ha->nvram;
+ mcp->mb[4] = (nv->enhanced_features &
+ EXTENDED_BB_CREDITS);
+ } else
+ mcp->mb[4] = 0;
mcp->out_mb |= MBX_4|MBX_3|MBX_2|MBX_1;
mcp->in_mb |= MBX_1;
} else {