scsi: mpt3sas: Handle trigger page after firmware update

If a firmware update adds support for the trigger pages, then the driver
should handle this by writing the existing trigger data from the driver's
internal data structure to the corresponding trigger pages in NVRAM.

Also handle the case where the trigger page capability is no longer present
after a firmware downgrade.

Link: https://lore.kernel.org/r/20201126094311.8686-8-suganath-prabu.subramani@broadcom.comSigned-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mpt3sas/mpt3sas_base.c

@@ -5073,6 +5073,35 @@ _base_get_diag_triggers(struct MPT3SAS_ADAPTER *ioc)
 		_base_get_mpi_diag_triggers(ioc);
 }
 
+/**
+ * _base_update_diag_trigger_pages - Update the driver trigger pages after
+ *			online FW update, incase updated FW supports driver
+ *			trigger pages.
+ * @ioc : per adapter object
+ *
+ * Return nothing.
+ */
+static void
+_base_update_diag_trigger_pages(struct MPT3SAS_ADAPTER *ioc)
+{
+
+	if (ioc->diag_trigger_master.MasterData)
+		mpt3sas_config_update_driver_trigger_pg1(ioc,
+		    &ioc->diag_trigger_master, 1);
+
+	if (ioc->diag_trigger_event.ValidEntries)
+		mpt3sas_config_update_driver_trigger_pg2(ioc,
+		    &ioc->diag_trigger_event, 1);
+
+	if (ioc->diag_trigger_scsi.ValidEntries)
+		mpt3sas_config_update_driver_trigger_pg3(ioc,
+		    &ioc->diag_trigger_scsi, 1);
+
+	if (ioc->diag_trigger_mpi.ValidEntries)
+		mpt3sas_config_update_driver_trigger_pg4(ioc,
+		    &ioc->diag_trigger_mpi, 1);
+}
+
 /**
  * _base_static_config_pages - static start of day config pages
  * @ioc: per adapter object
@@ -5082,7 +5111,7 @@ _base_static_config_pages(struct MPT3SAS_ADAPTER *ioc)
 {
 	Mpi2ConfigReply_t mpi_reply;
 	u32 iounit_pg1_flags;
-
+	int tg_flags = 0;
 	ioc->nvme_abort_timeout = 30;
 	mpt3sas_config_get_manufacturing_pg0(ioc, &mpi_reply, &ioc->manu_pg0);
 	if (ioc->ir_firmware)
@@ -5162,6 +5191,25 @@ _base_static_config_pages(struct MPT3SAS_ADAPTER *ioc)
 	if (ioc->is_gen35_ioc) {
 		if (ioc->is_driver_loading)
 			_base_get_diag_triggers(ioc);
+		else {
+			/*
+			 * In case of online HBA FW update operation,
+			 * check whether updated FW supports the driver trigger
+			 * pages or not.
+			 * - If previous FW has not supported driver trigger
+			 *   pages and newer FW supports them then update these
+			 *   pages with current diag trigger values.
+			 * - If previous FW has supported driver trigger pages
+			 *   and new FW doesn't support them then disable
+			 *   support_trigger_pages flag.
+			 */
+			tg_flags = _base_check_for_trigger_pages_support(ioc);
+			if (!ioc->supports_trigger_pages && tg_flags != -EFAULT)
+				_base_update_diag_trigger_pages(ioc);
+			else if (ioc->supports_trigger_pages &&
+			    tg_flags == -EFAULT)
+				ioc->supports_trigger_pages = 0;
+		}
 	}
 }