[SCSI] mpt2sas: Add Extended Type for Diagnostic Buffer support

Added tests for registry entries of EXBuffSize, EXImmed, and EXType to
support the new Extended diag buffer type.  Modified code where necessary to
handle the new ExtendedType field in the F/W diagnostic Post and Release
messages.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: Eric Moore <Eric.moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/scsi/mpt2sas/mpt2sas_base.c

@@ -78,15 +78,16 @@ module_param(msix_disable, int, 0);
 MODULE_PARM_DESC(msix_disable, " disable msix routed interrupts (default=0)");
 
 /* diag_buffer_enable is bitwise
- * bit 0 set = MPI2_DIAG_BUF_TYPE_TRACE(1)
- * bit 1 set = MPI2_DIAG_BUF_TYPE_SNAPSHOT(2)
+ * bit 0 set = TRACE
+ * bit 1 set = SNAPSHOT
+ * bit 2 set = EXTENDED
  *
  * Either bit can be set, or both
  */
 static int diag_buffer_enable;
 module_param(diag_buffer_enable, int, 0);
-MODULE_PARM_DESC(diag_buffer_enable, " enable diag buffer at driver load "
-    "time (TRACE=1/SNAP=2/default=0)");
+MODULE_PARM_DESC(diag_buffer_enable, " post diag buffers "
+    "(TRACE=1/SNAPSHOT=2/EXTENDED=4/default=0)");
 
 int mpt2sas_fwfault_debug;
 MODULE_PARM_DESC(mpt2sas_fwfault_debug, " enable detection of firmware fault "
@@ -1764,6 +1765,12 @@ _base_display_ioc_capabilities(struct MPT2SAS_ADAPTER *ioc)
 		i++;
 	}
 
+	if (ioc->facts.IOCCapabilities &
+	    MPI2_IOCFACTS_CAPABILITY_EXTENDED_BUFFER) {
+		printk(KERN_INFO "%sDiag Extended Buffer", i ? "," : "");
+		i++;
+	}
+
 	if (ioc->facts.IOCCapabilities &
 	    MPI2_IOCFACTS_CAPABILITY_TASK_SET_FULL_HANDLING) {
 		printk("%sTask Set Full", i ? "," : "");

drivers/scsi/mpt2sas/mpt2sas_ctl.c

@@ -1230,7 +1230,7 @@ _ctl_btdh_mapping(void __user *arg)
 /**
  * _ctl_diag_capability - return diag buffer capability
  * @ioc: per adapter object
- * @buffer_type: specifies either TRACE or SNAPSHOT
+ * @buffer_type: specifies either TRACE, SNAPSHOT, or EXTENDED
  *
  * returns 1 when diag buffer support is enabled in firmware
  */
@@ -1250,6 +1250,10 @@ _ctl_diag_capability(struct MPT2SAS_ADAPTER *ioc, u8 buffer_type)
 		    MPI2_IOCFACTS_CAPABILITY_SNAPSHOT_BUFFER)
 			rc = 1;
 		break;
+	case MPI2_DIAG_BUF_TYPE_EXTENDED:
+		if (ioc->facts.IOCCapabilities &
+		    MPI2_IOCFACTS_CAPABILITY_EXTENDED_BUFFER)
+			rc = 1;
 	}
 
 	return rc;
@@ -1460,6 +1464,16 @@ mpt2sas_enable_diag_buffer(struct MPT2SAS_ADAPTER *ioc, u8 bits_to_register)
 		diag_register.unique_id = 0x7075901;
 		_ctl_diag_register_2(ioc,  &diag_register);
 	}
+
+	if (bits_to_register & 4) {
+		printk(MPT2SAS_INFO_FMT "registering extended buffer support\n",
+		    ioc->name);
+		diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_EXTENDED;
+		/* register for 2MB buffers  */
+		diag_register.requested_buffer_size = 2 * (1024 * 1024);
+		diag_register.unique_id = 0x7075901;
+		_ctl_diag_register_2(ioc,  &diag_register);
+	}
 }
 
 /**
@@ -1652,7 +1666,7 @@ _ctl_diag_query(void __user *arg)
 /**
  * _ctl_send_release - Diag Release Message
  * @ioc: per adapter object
- * @buffer_type - specifies either TRACE or SNAPSHOT
+ * @buffer_type - specifies either TRACE, SNAPSHOT, or EXTENDED
  * @issue_reset - specifies whether host reset is required.
  *
  */

drivers/scsi/mpt2sas/mpt2sas_ctl.h

@@ -313,7 +313,7 @@ struct mpt2_ioctl_btdh_mapping {
  * struct mpt2_diag_register - application register with driver
  * @hdr - generic header
  * @reserved -
- * @buffer_type - specifies either TRACE or SNAPSHOT
+ * @buffer_type - specifies either TRACE, SNAPSHOT, or EXTENDED
  * @application_flags - misc flags
  * @diagnostic_flags - specifies flags affecting command processing
  * @product_specific - product specific information
@@ -352,7 +352,7 @@ struct mpt2_diag_unregister {
  * struct mpt2_diag_query - query relevant info associated with diag buffers
  * @hdr - generic header
  * @reserved -
- * @buffer_type - specifies either TRACE or SNAPSHOT
+ * @buffer_type - specifies either TRACE, SNAPSHOT, or EXTENDED
  * @application_flags - misc flags
  * @diagnostic_flags - specifies flags affecting command processing
  * @product_specific - product specific information