[PATCH 7/8] mpt3sas: Handle trigger page support after reset.

[Suganath Prabu S <suganath-prabu.subramani@broadcom.com>]

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Description:
Handle trigger page support after reset.
Prior to IOC reset, if firmware is not supporting trigger pages
and after reset if driver sees the firmware started supporting
trigger pages. (In case of a reset after firmware
upgrade) then the driver should handle this by writing the
already available trigger data from the driver’s internal data
structure to the corresponding trigger pages NVRAM region and
also update Trigger flags in Trigger Page-0 NVRAM region
accordingly.

Implementation:
Add ioc->supports_trigger_pages, this feature supported flag is
used to determine whether the pages needs update or not. And also
this feature supporting flag needs to be updated for every reset as
it is possible that FW won’t support trigger pages before reset
and start supporting after reset or vice versa.
(In case of FW upgrade or downgrade)

Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
---
 drivers/scsi/mpt3sas/mpt3sas_base.c | 50 ++++++++++++++++++++++++++++-
 drivers/scsi/mpt3sas/mpt3sas_base.h | 12 +++++++
 2 files changed, 61 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index ee86124..655f277 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/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;
+		}
 	}
 }
 
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.h b/drivers/scsi/mpt3sas/mpt3sas_base.h
index 6745d79..352e6cd 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.h
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.h
@@ -1834,6 +1834,18 @@ mpt3sas_config_get_driver_trigger_pg3(struct MPT3SAS_ADAPTER *ioc,
 int
 mpt3sas_config_get_driver_trigger_pg4(struct MPT3SAS_ADAPTER *ioc,
 	Mpi2ConfigReply_t *mpi_reply, Mpi26DriverTriggerPage4_t *config_page);
+int
+mpt3sas_config_update_driver_trigger_pg1(struct MPT3SAS_ADAPTER *ioc,
+	struct SL_WH_MASTER_TRIGGER_T *master_tg, bool set);
+int
+mpt3sas_config_update_driver_trigger_pg2(struct MPT3SAS_ADAPTER *ioc,
+	struct SL_WH_EVENT_TRIGGERS_T *event_tg, bool set);
+int
+mpt3sas_config_update_driver_trigger_pg3(struct MPT3SAS_ADAPTER *ioc,
+	struct SL_WH_SCSI_TRIGGERS_T *scsi_tg, bool set);
+int
+mpt3sas_config_update_driver_trigger_pg4(struct MPT3SAS_ADAPTER *ioc,
+	struct SL_WH_MPI_TRIGGERS_T *mpi_tg, bool set);
 
 /* ctl shared API */
 extern struct device_attribute *mpt3sas_host_attrs[];
-- 
2.18.4


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