mpt3sas: Make use of additional HighPriority credit message frames for sending SCSI IO's

Driver assumes HighPriority credit as part of Global credit. But,
Firmware treats HighPriority credit value and global cedits as two
different values. Changed host queue algorithm to treat global credits
and highPriority credits as two different values.

Signed-off-by: Suganath prabu Subramani <suganath-prabu.subramani@avagotech.com>
Signed-off-by: Chaitra P B <chaitra.basappa@avagotech.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.h b/drivers/scsi/mpt3sas/mpt3sas_base.h
index 2786222..4b52a07 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.h
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.h
@@ -122,6 +122,8 @@
 #define  NO_SLEEP			0
 
 #define INTERNAL_CMDS_COUNT		10	/* reserved cmds */
+/* reserved for issuing internally framed scsi io cmds */
+#define INTERNAL_SCSIIO_CMDS_COUNT	3
 
 #define MPI3_HIM_MASK			0xFFFFFFFF /* mask every bit*/
 
@@ -677,6 +679,25 @@ struct _tr_list {
 	u16	state;
 };
 
+/**
+ * struct _sc_list - delayed SAS_IO_UNIT_CONTROL message list
+ * @handle: device handle
+ */
+struct _sc_list {
+	struct list_head list;
+	u16     handle;
+};
+
+/**
+ * struct _event_ack_list - delayed event acknowledgment list
+ * @Event: Event ID
+ * @EventContext: used to track the event uniquely
+ */
+struct _event_ack_list {
+	struct list_head list;
+	u16     Event;
+	u32     EventContext;
+};
 
 /**
  * struct adapter_reply_queue - the reply queue struct
@@ -922,6 +943,8 @@ typedef void (*MPT3SAS_FLUSH_RUNNING_CMDS)(struct MPT3SAS_ADAPTER *ioc);
  * @replyPostRegisterIndex: index of next position in Reply Desc Post Queue
  * @delayed_tr_list: target reset link list
  * @delayed_tr_volume_list: volume target reset link list
+ * @delayed_sc_list:
+ * @delayed_event_ack_list:
  * @temp_sensors_count: flag to carry the number of temperature sensors
  * @pci_access_mutex: Mutex to synchronize ioctl,sysfs show path and
  *	pci resource handling. PCI resource freeing will lead to free
@@ -1143,6 +1166,8 @@ struct MPT3SAS_ADAPTER {
 
 	struct list_head delayed_tr_list;
 	struct list_head delayed_tr_volume_list;
+	struct list_head delayed_sc_list;
+	struct list_head delayed_event_ack_list;
 	u8		temp_sensors_count;
 	struct mutex pci_access_mutex;
 
@@ -1260,6 +1285,8 @@ void mpt3sas_scsih_clear_tm_flag(struct MPT3SAS_ADAPTER *ioc, u16 handle);
 void mpt3sas_expander_remove(struct MPT3SAS_ADAPTER *ioc, u64 sas_address);
 void mpt3sas_device_remove_by_sas_address(struct MPT3SAS_ADAPTER *ioc,
 	u64 sas_address);
+u8 mpt3sas_check_for_pending_internal_cmds(struct MPT3SAS_ADAPTER *ioc,
+	u16 smid);
 
 struct _sas_node *mpt3sas_scsih_expander_find_by_handle(
 	struct MPT3SAS_ADAPTER *ioc, u16 handle);