From: Kevin Barnett <kevin.barn...@hpe.com>
put in SIS mode during initialization.
support kexec/kdump
Reviewed-by: Scott Benesh <scott.ben...@microsemi.com>
Reviewed-by: Scott Teel <scott.t...@microsemi.com>
Signed-off-by: Kevin Barnett <kevin.barn...@microsemi.com>
Signed-off-by: Don Brace <don.br...@microsemi.com>
---
drivers/scsi/smartpqi/smartpqi.h | 2 +
drivers/scsi/smartpqi/smartpqi_init.c | 60 +++++++++++++++++++--------------
drivers/scsi/smartpqi/smartpqi_sis.c | 6 +++
drivers/scsi/smartpqi/smartpqi_sis.h | 1 +
4 files changed, 42 insertions(+), 27 deletions(-)
diff --git a/drivers/scsi/smartpqi/smartpqi.h b/drivers/scsi/smartpqi/smartpqi.h
index 73754ca..62045c1 100644
--- a/drivers/scsi/smartpqi/smartpqi.h
+++ b/drivers/scsi/smartpqi/smartpqi.h
@@ -964,7 +964,7 @@ struct pqi_ctrl_info {
};
enum pqi_ctrl_mode {
- UNKNOWN,
+ SIS_MODE = 0,
PQI_MODE
};
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c
b/drivers/scsi/smartpqi/smartpqi_init.c
index 14d74e1..5a5b9ab 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -5245,38 +5245,50 @@ static int pqi_get_ctrl_firmware_version(struct
pqi_ctrl_info *ctrl_info)
return rc;
}
-static int pqi_kdump_init(struct pqi_ctrl_info *ctrl_info)
+/* Switches the controller from PQI mode back into SIS mode. */
+
+static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+
+ sis_disable_msix(ctrl_info);
+ rc = pqi_reset(ctrl_info);
+ if (rc)
+ return rc;
+ sis_reenable_sis_mode(ctrl_info);
+ pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
+
+ return 0;
+}
+
+/*
+ * If the controller isn't already in SIS mode, this function forces it into
+ * SIS mode.
+ */
+
+static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
{
if (!sis_is_firmware_running(ctrl_info))
return -ENXIO;
- if (pqi_get_ctrl_mode(ctrl_info) == PQI_MODE) {
- sis_disable_msix(ctrl_info);
- if (pqi_reset(ctrl_info) == 0)
- sis_reenable_sis_mode(ctrl_info);
+ if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
+ return 0;
+
+ if (sis_is_kernel_up(ctrl_info)) {
+ pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
+ return 0;
}
- return 0;
+ return pqi_revert_to_sis_mode(ctrl_info);
}
static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
{
int rc;
- if (reset_devices) {
- rc = pqi_kdump_init(ctrl_info);
- if (rc)
- return rc;
- }
-
- /*
- * When the controller comes out of reset, it is always running
- * in legacy SIS mode. This is so that it can be compatible
- * with legacy drivers shipped with OSes. So we have to talk
- * to it using SIS commands at first. Once we are satisified
- * that the controller supports PQI, we transition it into PQI
- * mode.
- */
+ rc = pqi_force_sis_mode(ctrl_info);
+ if (rc)
+ return rc;
/*
* Wait until the controller is ready to start accepting SIS
@@ -5594,12 +5606,8 @@ static void pqi_remove_ctrl(struct pqi_ctrl_info
*ctrl_info)
cancel_delayed_work_sync(&ctrl_info->update_time_work);
pqi_remove_all_scsi_devices(ctrl_info);
pqi_unregister_scsi(ctrl_info);
-
- if (ctrl_info->pqi_mode_enabled) {
- sis_disable_msix(ctrl_info);
- if (pqi_reset(ctrl_info) == 0)
- sis_reenable_sis_mode(ctrl_info);
- }
+ if (ctrl_info->pqi_mode_enabled)
+ pqi_revert_to_sis_mode(ctrl_info);
pqi_free_ctrl_resources(ctrl_info);
}
diff --git a/drivers/scsi/smartpqi/smartpqi_sis.c
b/drivers/scsi/smartpqi/smartpqi_sis.c
index c7d9ea1..c5325a4 100644
--- a/drivers/scsi/smartpqi/smartpqi_sis.c
+++ b/drivers/scsi/smartpqi/smartpqi_sis.c
@@ -127,6 +127,12 @@ bool sis_is_firmware_running(struct pqi_ctrl_info
*ctrl_info)
return running;
}
+bool sis_is_kernel_up(struct pqi_ctrl_info *ctrl_info)
+{
+ return readl(&ctrl_info->registers->sis_firmware_status) &
+ SIS_CTRL_KERNEL_UP;
+}
+
/* used for passing command parameters/results when issuing SIS commands */
struct sis_sync_cmd_params {
u32 mailbox[6]; /* mailboxes 0-5 */
diff --git a/drivers/scsi/smartpqi/smartpqi_sis.h
b/drivers/scsi/smartpqi/smartpqi_sis.h
index 7f7b68c..157768d 100644
--- a/drivers/scsi/smartpqi/smartpqi_sis.h
+++ b/drivers/scsi/smartpqi/smartpqi_sis.h
@@ -21,6 +21,7 @@
int sis_wait_for_ctrl_ready(struct pqi_ctrl_info *ctrl_info);
bool sis_is_firmware_running(struct pqi_ctrl_info *ctrl_info);
+bool sis_is_kernel_up(struct pqi_ctrl_info *ctrl_info);
int sis_get_ctrl_properties(struct pqi_ctrl_info *ctrl_info);
int sis_get_pqi_capabilities(struct pqi_ctrl_info *ctrl_info);
int sis_init_base_struct_addr(struct pqi_ctrl_info *ctrl_info);
