Debugging the driver requires tracing the state transtions and tracing
state names is less work than decoding numbers.
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
drivers/scsi/isci/phy.c | 34 +++--
drivers/scsi/isci/phy.h | 154 ++++++++--------------
drivers/scsi/isci/port.c | 46 ++++---
drivers/scsi/isci/port.h | 103 ++++++---------
drivers/scsi/isci/remote_device.c | 50 ++++---
drivers/scsi/isci/remote_device.h | 205 +++++++++++++----------------
drivers/scsi/isci/remote_node_context.c | 19 +--
drivers/scsi/isci/remote_node_context.h | 97 ++++++--------
drivers/scsi/isci/request.c | 25 ++--
drivers/scsi/isci/request.h | 219 +++++++++++++------------------
10 files changed, 432 insertions(+), 520 deletions(-)
diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c
index 8d412ca..87064f1 100644
--- a/drivers/scsi/isci/phy.c
+++ b/drivers/scsi/isci/phy.c
@@ -59,6 +59,16 @@
#include "scu_event_codes.h"
#include "probe_roms.h"
+#undef C
+#define C(a) (#a)
+static const char *phy_state_name(enum sci_phy_states state)
+{
+ static const char * const strings[] = PHY_STATES;
+
+ return strings[state];
+}
+#undef C
+
/* Maximum arbitration wait time in micro-seconds */
#define SCIC_SDS_PHY_MAX_ARBITRATION_WAIT_TIME (700)
@@ -454,8 +464,8 @@ enum sci_status sci_phy_start(struct isci_phy *iphy)
enum sci_phy_states state = iphy->sm.current_state_id;
if (state != SCI_PHY_STOPPED) {
- dev_dbg(sciphy_to_dev(iphy),
- "%s: in wrong state: %d\n", __func__, state);
+ dev_dbg(sciphy_to_dev(iphy), "%s: in wrong state: %s\n",
+ __func__, phy_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
@@ -480,8 +490,8 @@ enum sci_status sci_phy_stop(struct isci_phy *iphy)
case SCI_PHY_READY:
break;
default:
- dev_dbg(sciphy_to_dev(iphy),
- "%s: in wrong state: %d\n", __func__, state);
+ dev_dbg(sciphy_to_dev(iphy), "%s: in wrong state: %s\n",
+ __func__, phy_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
@@ -494,8 +504,8 @@ enum sci_status sci_phy_reset(struct isci_phy *iphy)
enum sci_phy_states state = iphy->sm.current_state_id;
if (state != SCI_PHY_READY) {
- dev_dbg(sciphy_to_dev(iphy),
- "%s: in wrong state: %d\n", __func__, state);
+ dev_dbg(sciphy_to_dev(iphy), "%s: in wrong state: %s\n",
+ __func__, phy_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
@@ -544,8 +554,8 @@ enum sci_status sci_phy_consume_power_handler(struct isci_phy *iphy)
return SCI_SUCCESS;
}
default:
- dev_dbg(sciphy_to_dev(iphy),
- "%s: in wrong state: %d\n", __func__, state);
+ dev_dbg(sciphy_to_dev(iphy), "%s: in wrong state: %s\n",
+ __func__, phy_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
}
@@ -870,8 +880,8 @@ enum sci_status sci_phy_event_handler(struct isci_phy *iphy, u32 event_code)
}
return SCI_SUCCESS;
default:
- dev_dbg(sciphy_to_dev(iphy),
- "%s: in wrong state: %d\n", __func__, state);
+ dev_dbg(sciphy_to_dev(iphy), "%s: in wrong state: %s\n",
+ __func__, phy_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
}
@@ -964,8 +974,8 @@ enum sci_status sci_phy_frame_handler(struct isci_phy *iphy, u32 frame_index)
return result;
}
default:
- dev_dbg(sciphy_to_dev(iphy),
- "%s: in wrong state: %d\n", __func__, state);
+ dev_dbg(sciphy_to_dev(iphy), "%s: in wrong state: %s\n",
+ __func__, phy_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
diff --git a/drivers/scsi/isci/phy.h b/drivers/scsi/isci/phy.h
index a5e1a9e..0e45833 100644
--- a/drivers/scsi/isci/phy.h
+++ b/drivers/scsi/isci/phy.h
@@ -343,101 +343,65 @@ enum sci_phy_counter_id {
SCIC_PHY_COUNTER_SN_DWORD_SYNC_ERROR
};
-enum sci_phy_states {
- /**
- * Simply the initial state for the base domain state machine.
- */
- SCI_PHY_INITIAL,
-
- /**
- * This state indicates that the phy has successfully been stopped.
- * In this state no new IO operations are permitted on this phy.
- * This state is entered from the INITIAL state.
- * This state is entered from the STARTING state.
- * This state is entered from the READY state.
- * This state is entered from the RESETTING state.
- */
- SCI_PHY_STOPPED,
-
- /**
- * This state indicates that the phy is in the process of becomming
- * ready. In this state no new IO operations are permitted on this phy.
- * This state is entered from the STOPPED state.
- * This state is entered from the READY state.
- * This state is entered from the RESETTING state.
- */
- SCI_PHY_STARTING,
-
- /**
- * Initial state
- */
- SCI_PHY_SUB_INITIAL,
-
- /**
- * Wait state for the hardware OSSP event type notification
- */
- SCI_PHY_SUB_AWAIT_OSSP_EN,
-
- /**
- * Wait state for the PHY speed notification
- */
- SCI_PHY_SUB_AWAIT_SAS_SPEED_EN,
-
- /**
- * Wait state for the IAF Unsolicited frame notification
- */
- SCI_PHY_SUB_AWAIT_IAF_UF,
-
- /**
- * Wait state for the request to consume power
- */
- SCI_PHY_SUB_AWAIT_SAS_POWER,
-
- /**
- * Wait state for request to consume power
- */
- SCI_PHY_SUB_AWAIT_SATA_POWER,
-
- /**
- * Wait state for the SATA PHY notification
- */
- SCI_PHY_SUB_AWAIT_SATA_PHY_EN,
-
- /**
- * Wait for the SATA PHY speed notification
- */
- SCI_PHY_SUB_AWAIT_SATA_SPEED_EN,
-
- /**
- * Wait state for the SIGNATURE FIS unsolicited frame notification
- */
- SCI_PHY_SUB_AWAIT_SIG_FIS_UF,
-
- /**
- * Exit state for this state machine
- */
- SCI_PHY_SUB_FINAL,
-
- /**
- * This state indicates the the phy is now ready. Thus, the user
- * is able to perform IO operations utilizing this phy as long as it
- * is currently part of a valid port.
- * This state is entered from the STARTING state.
- */
- SCI_PHY_READY,
-
- /**
- * This state indicates that the phy is in the process of being reset.
- * In this state no new IO operations are permitted on this phy.
- * This state is entered from the READY state.
- */
- SCI_PHY_RESETTING,
-
- /**
- * Simply the final state for the base phy state machine.
- */
- SCI_PHY_FINAL,
-};
+/**
+ * enum sci_phy_states - phy state machine states
+ * @SCI_PHY_INITIAL: Simply the initial state for the base domain state
+ * machine.
+ * @SCI_PHY_STOPPED: phy has successfully been stopped. In this state
+ * no new IO operations are permitted on this phy.
+ * @SCI_PHY_STARTING: the phy is in the process of becomming ready. In
+ * this state no new IO operations are permitted on
+ * this phy.
+ * @SCI_PHY_SUB_INITIAL: Initial state
+ * @SCI_PHY_SUB_AWAIT_OSSP_EN: Wait state for the hardware OSSP event
+ * type notification
+ * @SCI_PHY_SUB_AWAIT_SAS_SPEED_EN: Wait state for the PHY speed
+ * notification
+ * @SCI_PHY_SUB_AWAIT_IAF_UF: Wait state for the IAF Unsolicited frame
+ * notification
+ * @SCI_PHY_SUB_AWAIT_SAS_POWER: Wait state for the request to consume
+ * power
+ * @SCI_PHY_SUB_AWAIT_SATA_POWER: Wait state for request to consume
+ * power
+ * @SCI_PHY_SUB_AWAIT_SATA_PHY_EN: Wait state for the SATA PHY
+ * notification
+ * @SCI_PHY_SUB_AWAIT_SATA_SPEED_EN: Wait for the SATA PHY speed
+ * notification
+ * @SCI_PHY_SUB_AWAIT_SIG_FIS_UF: Wait state for the SIGNATURE FIS
+ * unsolicited frame notification
+ * @SCI_PHY_SUB_FINAL: Exit state for this state machine
+ * @SCI_PHY_READY: phy is now ready. Thus, the user is able to perform
+ * IO operations utilizing this phy as long as it is
+ * currently part of a valid port. This state is
+ * entered from the STARTING state.
+ * @SCI_PHY_RESETTING: phy is in the process of being reset. In this
+ * state no new IO operations are permitted on this
+ * phy. This state is entered from the READY state.
+ * @SCI_PHY_FINAL: Simply the final state for the base phy state
+ * machine.
+ */
+#define PHY_STATES {\
+ C(PHY_INITIAL),\
+ C(PHY_STOPPED),\
+ C(PHY_STARTING),\
+ C(PHY_SUB_INITIAL),\
+ C(PHY_SUB_AWAIT_OSSP_EN),\
+ C(PHY_SUB_AWAIT_SAS_SPEED_EN),\
+ C(PHY_SUB_AWAIT_IAF_UF),\
+ C(PHY_SUB_AWAIT_SAS_POWER),\
+ C(PHY_SUB_AWAIT_SATA_POWER),\
+ C(PHY_SUB_AWAIT_SATA_PHY_EN),\
+ C(PHY_SUB_AWAIT_SATA_SPEED_EN),\
+ C(PHY_SUB_AWAIT_SIG_FIS_UF),\
+ C(PHY_SUB_FINAL),\
+ C(PHY_READY),\
+ C(PHY_RESETTING),\
+ C(PHY_FINAL),\
+ }
+#undef C
+#define C(a) SCI_##a
+enum sci_phy_states PHY_STATES;
+#undef C
void sci_phy_construct(
struct isci_phy *iphy,
diff --git a/drivers/scsi/isci/port.c b/drivers/scsi/isci/port.c
index c5ae94d..5fada73 100644
--- a/drivers/scsi/isci/port.c
+++ b/drivers/scsi/isci/port.c
@@ -60,6 +60,16 @@
#define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000)
#define SCU_DUMMY_INDEX (0xFFFF)
+#undef C
+#define C(a) (#a)
+const char *port_state_name(enum sci_port_states state)
+{
+ static const char * const strings[] = PORT_STATES;
+
+ return strings[state];
+}
+#undef C
+
static struct device *sciport_to_dev(struct isci_port *iport)
{
int i = iport->physical_port_index;
@@ -1054,8 +1064,8 @@ enum sci_status sci_port_start(struct isci_port *iport)
state = iport->sm.current_state_id;
if (state != SCI_PORT_STOPPED) {
- dev_warn(sciport_to_dev(iport),
- "%s: in wrong state: %d\n", __func__, state);
+ dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
+ __func__, port_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
@@ -1129,8 +1139,8 @@ enum sci_status sci_port_stop(struct isci_port *iport)
SCI_PORT_STOPPING);
return SCI_SUCCESS;
default:
- dev_warn(sciport_to_dev(iport),
- "%s: in wrong state: %d\n", __func__, state);
+ dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
+ __func__, port_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
}
@@ -1144,8 +1154,8 @@ static enum sci_status sci_port_hard_reset(struct isci_port *iport, u32 timeout)
state = iport->sm.current_state_id;
if (state != SCI_PORT_SUB_OPERATIONAL) {
- dev_warn(sciport_to_dev(iport),
- "%s: in wrong state: %d\n", __func__, state);
+ dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
+ __func__, port_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
@@ -1239,8 +1249,8 @@ enum sci_status sci_port_add_phy(struct isci_port *iport,
SCI_PORT_SUB_CONFIGURING);
return SCI_SUCCESS;
default:
- dev_warn(sciport_to_dev(iport),
- "%s: in wrong state: %d\n", __func__, state);
+ dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
+ __func__, port_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
}
@@ -1289,8 +1299,8 @@ enum sci_status sci_port_remove_phy(struct isci_port *iport,
SCI_PORT_SUB_CONFIGURING);
return SCI_SUCCESS;
default:
- dev_warn(sciport_to_dev(iport),
- "%s: in wrong state: %d\n", __func__, state);
+ dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
+ __func__, port_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
}
@@ -1332,8 +1342,8 @@ enum sci_status sci_port_link_up(struct isci_port *iport,
sci_port_general_link_up_handler(iport, iphy, PF_RESUME);
return SCI_SUCCESS;
default:
- dev_warn(sciport_to_dev(iport),
- "%s: in wrong state: %d\n", __func__, state);
+ dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
+ __func__, port_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
}
@@ -1362,8 +1372,8 @@ enum sci_status sci_port_link_down(struct isci_port *iport,
sci_port_deactivate_phy(iport, iphy, false);
return SCI_SUCCESS;
default:
- dev_warn(sciport_to_dev(iport),
- "%s: in wrong state: %d\n", __func__, state);
+ dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
+ __func__, port_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
}
@@ -1382,8 +1392,8 @@ enum sci_status sci_port_start_io(struct isci_port *iport,
iport->started_request_count++;
return SCI_SUCCESS;
default:
- dev_warn(sciport_to_dev(iport),
- "%s: in wrong state: %d\n", __func__, state);
+ dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
+ __func__, port_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
}
@@ -1397,8 +1407,8 @@ enum sci_status sci_port_complete_io(struct isci_port *iport,
state = iport->sm.current_state_id;
switch (state) {
case SCI_PORT_STOPPED:
- dev_warn(sciport_to_dev(iport),
- "%s: in wrong state: %d\n", __func__, state);
+ dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
+ __func__, port_state_name(state));
return SCI_FAILURE_INVALID_STATE;
case SCI_PORT_STOPPING:
sci_port_decrement_request_count(iport);
diff --git a/drivers/scsi/isci/port.h b/drivers/scsi/isci/port.h
index 321b987..6b56240 100644
--- a/drivers/scsi/isci/port.h
+++ b/drivers/scsi/isci/port.h
@@ -144,70 +144,47 @@ struct sci_port_properties {
};
/**
- * enum sci_port_states - This enumeration depicts all the states for the
- * common port state machine.
- *
- *
+ * enum sci_port_states - port state machine states
+ * @SCI_PORT_STOPPED: port has successfully been stopped. In this state
+ * no new IO operations are permitted. This state is
+ * entered from the STOPPING state.
+ * @SCI_PORT_STOPPING: port is in the process of stopping. In this
+ * state no new IO operations are permitted, but
+ * existing IO operations are allowed to complete.
+ * This state is entered from the READY state.
+ * @SCI_PORT_READY: port is now ready. Thus, the user is able to
+ * perform IO operations on this port. This state is
+ * entered from the STARTING state.
+ * @SCI_PORT_SUB_WAITING: port is started and ready but has no active
+ * phys.
+ * @SCI_PORT_SUB_OPERATIONAL: port is started and ready and there is at
+ * least one phy operational.
+ * @SCI_PORT_SUB_CONFIGURING: port is started and there was an
+ * add/remove phy event. This state is only
+ * used in Automatic Port Configuration Mode
+ * (APC)
+ * @SCI_PORT_RESETTING: port is in the process of performing a hard
+ * reset. Thus, the user is unable to perform IO
+ * operations on this port. This state is entered
+ * from the READY state.
+ * @SCI_PORT_FAILED: port has failed a reset request. This state is
+ * entered when a port reset request times out. This
+ * state is entered from the RESETTING state.
*/
-enum sci_port_states {
- /**
- * This state indicates that the port has successfully been stopped.
- * In this state no new IO operations are permitted.
- * This state is entered from the STOPPING state.
- */
- SCI_PORT_STOPPED,
-
- /**
- * This state indicates that the port is in the process of stopping.
- * In this state no new IO operations are permitted, but existing IO
- * operations are allowed to complete.
- * This state is entered from the READY state.
- */
- SCI_PORT_STOPPING,
-
- /**
- * This state indicates the port is now ready. Thus, the user is
- * able to perform IO operations on this port.
- * This state is entered from the STARTING state.
- */
- SCI_PORT_READY,
-
- /**
- * The substate where the port is started and ready but has no
- * active phys.
- */
- SCI_PORT_SUB_WAITING,
-
- /**
- * The substate where the port is started and ready and there is
- * at least one phy operational.
- */
- SCI_PORT_SUB_OPERATIONAL,
-
- /**
- * The substate where the port is started and there was an
- * add/remove phy event. This state is only used in Automatic
- * Port Configuration Mode (APC)
- */
- SCI_PORT_SUB_CONFIGURING,
-
- /**
- * This state indicates the port is in the process of performing a hard
- * reset. Thus, the user is unable to perform IO operations on this
- * port.
- * This state is entered from the READY state.
- */
- SCI_PORT_RESETTING,
-
- /**
- * This state indicates the port has failed a reset request. This state
- * is entered when a port reset request times out.
- * This state is entered from the RESETTING state.
- */
- SCI_PORT_FAILED,
-
-
-};
+#define PORT_STATES {\
+ C(PORT_STOPPED),\
+ C(PORT_STOPPING),\
+ C(PORT_READY),\
+ C(PORT_SUB_WAITING),\
+ C(PORT_SUB_OPERATIONAL),\
+ C(PORT_SUB_CONFIGURING),\
+ C(PORT_RESETTING),\
+ C(PORT_FAILED),\
+ }
+#undef C
+#define C(a) SCI_##a
+enum sci_port_states PORT_STATES;
+#undef C
static inline void sci_port_decrement_request_count(struct isci_port *iport)
{
diff --git a/drivers/scsi/isci/remote_device.c b/drivers/scsi/isci/remote_device.c
index 934d21e..8f501b0 100644
--- a/drivers/scsi/isci/remote_device.c
+++ b/drivers/scsi/isci/remote_device.c
@@ -62,6 +62,16 @@
#include "scu_event_codes.h"
#include "task.h"
+#undef C
+#define C(a) (#a)
+const char *dev_state_name(enum sci_remote_device_states state)
+{
+ static const char * const strings[] = REMOTE_DEV_STATES;
+
+ return strings[state];
+}
+#undef C
+
/**
* isci_remote_device_not_ready() - This function is called by the ihost when
* the remote device is not ready. We mark the isci device as ready (not
@@ -167,8 +177,8 @@ enum sci_status sci_remote_device_stop(struct isci_remote_device *idev,
case SCI_DEV_FAILED:
case SCI_DEV_FINAL:
default:
- dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n",
- __func__, state);
+ dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
+ __func__, dev_state_name(state));
return SCI_FAILURE_INVALID_STATE;
case SCI_DEV_STOPPED:
return SCI_SUCCESS;
@@ -226,8 +236,8 @@ enum sci_status sci_remote_device_reset(struct isci_remote_device *idev)
case SCI_DEV_RESETTING:
case SCI_DEV_FINAL:
default:
- dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n",
- __func__, state);
+ dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
+ __func__, dev_state_name(state));
return SCI_FAILURE_INVALID_STATE;
case SCI_DEV_READY:
case SCI_STP_DEV_IDLE:
@@ -246,8 +256,8 @@ enum sci_status sci_remote_device_reset_complete(struct isci_remote_device *idev
enum sci_remote_device_states state = sm->current_state_id;
if (state != SCI_DEV_RESETTING) {
- dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n",
- __func__, state);
+ dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
+ __func__, dev_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
@@ -262,8 +272,8 @@ enum sci_status sci_remote_device_suspend(struct isci_remote_device *idev,
enum sci_remote_device_states state = sm->current_state_id;
if (state != SCI_STP_DEV_CMD) {
- dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n",
- __func__, state);
+ dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
+ __func__, dev_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
@@ -287,8 +297,8 @@ enum sci_status sci_remote_device_frame_handler(struct isci_remote_device *idev,
case SCI_SMP_DEV_IDLE:
case SCI_DEV_FINAL:
default:
- dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n",
- __func__, state);
+ dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
+ __func__, dev_state_name(state));
/* Return the frame back to the controller */
sci_controller_release_frame(ihost, frame_index);
return SCI_FAILURE_INVALID_STATE;
@@ -502,8 +512,8 @@ enum sci_status sci_remote_device_start_io(struct isci_host *ihost,
case SCI_DEV_RESETTING:
case SCI_DEV_FINAL:
default:
- dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n",
- __func__, state);
+ dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
+ __func__, dev_state_name(state));
return SCI_FAILURE_INVALID_STATE;
case SCI_DEV_READY:
/* attempt to start an io request for this device object. The remote
@@ -637,8 +647,8 @@ enum sci_status sci_remote_device_complete_io(struct isci_host *ihost,
case SCI_DEV_FAILED:
case SCI_DEV_FINAL:
default:
- dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n",
- __func__, state);
+ dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
+ __func__, dev_state_name(state));
return SCI_FAILURE_INVALID_STATE;
case SCI_DEV_READY:
case SCI_STP_DEV_AWAIT_RESET:
@@ -721,8 +731,8 @@ enum sci_status sci_remote_device_start_task(struct isci_host *ihost,
case SCI_DEV_RESETTING:
case SCI_DEV_FINAL:
default:
- dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n",
- __func__, state);
+ dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
+ __func__, dev_state_name(state));
return SCI_FAILURE_INVALID_STATE;
case SCI_STP_DEV_IDLE:
case SCI_STP_DEV_CMD:
@@ -853,8 +863,8 @@ static enum sci_status sci_remote_device_destruct(struct isci_remote_device *ide
struct isci_host *ihost;
if (state != SCI_DEV_STOPPED) {
- dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n",
- __func__, state);
+ dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
+ __func__, dev_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
@@ -1204,8 +1214,8 @@ static enum sci_status sci_remote_device_start(struct isci_remote_device *idev,
enum sci_status status;
if (state != SCI_DEV_STOPPED) {
- dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n",
- __func__, state);
+ dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
+ __func__, dev_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
diff --git a/drivers/scsi/isci/remote_device.h b/drivers/scsi/isci/remote_device.h
index 98c2801..58637ee 100644
--- a/drivers/scsi/isci/remote_device.h
+++ b/drivers/scsi/isci/remote_device.h
@@ -179,122 +179,101 @@ enum sci_status sci_remote_device_reset_complete(
/**
* enum sci_remote_device_states - This enumeration depicts all the states
* for the common remote device state machine.
+ * @SCI_DEV_INITIAL: Simply the initial state for the base remote device
+ * state machine.
*
+ * @SCI_DEV_STOPPED: This state indicates that the remote device has
+ * successfully been stopped. In this state no new IO operations are
+ * permitted. This state is entered from the INITIAL state. This state
+ * is entered from the STOPPING state.
*
+ * @SCI_DEV_STARTING: This state indicates the the remote device is in
+ * the process of becoming ready (i.e. starting). In this state no new
+ * IO operations are permitted. This state is entered from the STOPPED
+ * state.
+ *
+ * @SCI_DEV_READY: This state indicates the remote device is now ready.
+ * Thus, the user is able to perform IO operations on the remote device.
+ * This state is entered from the STARTING state.
+ *
+ * @SCI_STP_DEV_IDLE: This is the idle substate for the stp remote
+ * device. When there are no active IO for the device it is is in this
+ * state.
+ *
+ * @SCI_STP_DEV_CMD: This is the command state for for the STP remote
+ * device. This state is entered when the device is processing a
+ * non-NCQ command. The device object will fail any new start IO
+ * requests until this command is complete.
+ *
+ * @SCI_STP_DEV_NCQ: This is the NCQ state for the STP remote device.
+ * This state is entered when the device is processing an NCQ reuqest.
+ * It will remain in this state so long as there is one or more NCQ
+ * requests being processed.
+ *
+ * @SCI_STP_DEV_NCQ_ERROR: This is the NCQ error state for the STP
+ * remote device. This state is entered when an SDB error FIS is
+ * received by the device object while in the NCQ state. The device
+ * object will only accept a READ LOG command while in this state.
+ *
+ * @SCI_STP_DEV_ATAPI_ERROR: This is the ATAPI error state for the STP
+ * ATAPI remote device. This state is entered when ATAPI device sends
+ * error status FIS without data while the device object is in CMD
+ * state. A suspension event is expected in this state. The device
+ * object will resume right away.
+ *
+ * @SCI_STP_DEV_AWAIT_RESET: This is the READY substate indicates the
+ * device is waiting for the RESET task coming to be recovered from
+ * certain hardware specific error.
+ *
+ * @SCI_SMP_DEV_IDLE: This is the ready operational substate for the
+ * remote device. This is the normal operational state for a remote
+ * device.
+ *
+ * @SCI_SMP_DEV_CMD: This is the suspended state for the remote device.
+ * This is the state that the device is placed in when a RNC suspend is
+ * received by the SCU hardware.
+ *
+ * @SCI_DEV_STOPPING: This state indicates that the remote device is in
+ * the process of stopping. In this state no new IO operations are
+ * permitted, but existing IO operations are allowed to complete. This
+ * state is entered from the READY state. This state is entered from
+ * the FAILED state.
+ *
+ * @SCI_DEV_FAILED: This state indicates that the remote device has
+ * failed. In this state no new IO operations are permitted. This
+ * state is entered from the INITIALIZING state. This state is entered
+ * from the READY state.
+ *
+ * @SCI_DEV_RESETTING: This state indicates the device is being reset.
+ * In this state no new IO operations are permitted. This state is
+ * entered from the READY state.
+ *
+ * @SCI_DEV_FINAL: Simply the final state for the base remote device
+ * state machine.
*/
-enum sci_remote_device_states {
- /**
- * Simply the initial state for the base remote device state machine.
- */
- SCI_DEV_INITIAL,
-
- /**
- * This state indicates that the remote device has successfully been
- * stopped. In this state no new IO operations are permitted.
- * This state is entered from the INITIAL state.
- * This state is entered from the STOPPING state.
- */
- SCI_DEV_STOPPED,
-
- /**
- * This state indicates the the remote device is in the process of
- * becoming ready (i.e. starting). In this state no new IO operations
- * are permitted.
- * This state is entered from the STOPPED state.
- */
- SCI_DEV_STARTING,
-
- /**
- * This state indicates the remote device is now ready. Thus, the user
- * is able to perform IO operations on the remote device.
- * This state is entered from the STARTING state.
- */
- SCI_DEV_READY,
-
- /**
- * This is the idle substate for the stp remote device. When there are no
- * active IO for the device it is is in this state.
- */
- SCI_STP_DEV_IDLE,
-
- /**
- * This is the command state for for the STP remote device. This state is
- * entered when the device is processing a non-NCQ command. The device object
- * will fail any new start IO requests until this command is complete.
- */
- SCI_STP_DEV_CMD,
-
- /**
- * This is the NCQ state for the STP remote device. This state is entered
- * when the device is processing an NCQ reuqest. It will remain in this state
- * so long as there is one or more NCQ requests being processed.
- */
- SCI_STP_DEV_NCQ,
-
- /**
- * This is the NCQ error state for the STP remote device. This state is
- * entered when an SDB error FIS is received by the device object while in the
- * NCQ state. The device object will only accept a READ LOG command while in
- * this state.
- */
- SCI_STP_DEV_NCQ_ERROR,
-
- /**
- * This is the ATAPI error state for the STP ATAPI remote device.
- * This state is entered when ATAPI device sends error status FIS
- * without data while the device object is in CMD state.
- * A suspension event is expected in this state.
- * The device object will resume right away.
- */
- SCI_STP_DEV_ATAPI_ERROR,
-
- /**
- * This is the READY substate indicates the device is waiting for the RESET task
- * coming to be recovered from certain hardware specific error.
- */
- SCI_STP_DEV_AWAIT_RESET,
-
- /**
- * This is the ready operational substate for the remote device. This is the
- * normal operational state for a remote device.
- */
- SCI_SMP_DEV_IDLE,
-
- /**
- * This is the suspended state for the remote device. This is the state that
- * the device is placed in when a RNC suspend is received by the SCU hardware.
- */
- SCI_SMP_DEV_CMD,
-
- /**
- * This state indicates that the remote device is in the process of
- * stopping. In this state no new IO operations are permitted, but
- * existing IO operations are allowed to complete.
- * This state is entered from the READY state.
- * This state is entered from the FAILED state.
- */
- SCI_DEV_STOPPING,
-
- /**
- * This state indicates that the remote device has failed.
- * In this state no new IO operations are permitted.
- * This state is entered from the INITIALIZING state.
- * This state is entered from the READY state.
- */
- SCI_DEV_FAILED,
-
- /**
- * This state indicates the device is being reset.
- * In this state no new IO operations are permitted.
- * This state is entered from the READY state.
- */
- SCI_DEV_RESETTING,
-
- /**
- * Simply the final state for the base remote device state machine.
- */
- SCI_DEV_FINAL,
-};
+#define REMOTE_DEV_STATES {\
+ C(DEV_INITIAL),\
+ C(DEV_STOPPED),\
+ C(DEV_STARTING),\
+ C(DEV_READY),\
+ C(STP_DEV_IDLE),\
+ C(STP_DEV_CMD),\
+ C(STP_DEV_NCQ),\
+ C(STP_DEV_NCQ_ERROR),\
+ C(STP_DEV_ATAPI_ERROR),\
+ C(STP_DEV_AWAIT_RESET),\
+ C(SMP_DEV_IDLE),\
+ C(SMP_DEV_CMD),\
+ C(DEV_STOPPING),\
+ C(DEV_FAILED),\
+ C(DEV_RESETTING),\
+ C(DEV_FINAL),\
+ }
+#undef C
+#define C(a) SCI_##a
+enum sci_remote_device_states REMOTE_DEV_STATES;
+#undef C
+const char *dev_state_name(enum sci_remote_device_states state);
static inline struct isci_remote_device *rnc_to_dev(struct sci_remote_node_context *rnc)
{
diff --git a/drivers/scsi/isci/remote_node_context.c b/drivers/scsi/isci/remote_node_context.c
index 748e833..3a94634 100644
--- a/drivers/scsi/isci/remote_node_context.c
+++ b/drivers/scsi/isci/remote_node_context.c
@@ -60,18 +60,15 @@
#include "scu_event_codes.h"
#include "scu_task_context.h"
+#undef C
+#define C(a) (#a)
+const char *rnc_state_name(enum scis_sds_remote_node_context_states state)
+{
+ static const char * const strings[] = RNC_STATES;
-/**
- *
- * @sci_rnc: The RNC for which the is posted request is being made.
- *
- * This method will return true if the RNC is not in the initial state. In all
- * other states the RNC is considered active and this will return true. The
- * destroy request of the state machine drives the RNC back to the initial
- * state. If the state machine changes then this routine will also have to be
- * changed. bool true if the state machine is not in the initial state false if
- * the state machine is in the initial state
- */
+ return strings[state];
+}
+#undef C
/**
*
diff --git a/drivers/scsi/isci/remote_node_context.h b/drivers/scsi/isci/remote_node_context.h
index 41580ad..a241e0f 100644
--- a/drivers/scsi/isci/remote_node_context.h
+++ b/drivers/scsi/isci/remote_node_context.h
@@ -85,61 +85,50 @@ struct sci_remote_node_context;
typedef void (*scics_sds_remote_node_context_callback)(void *);
/**
- * This is the enumeration of the remote node context states.
+ * enum sci_remote_node_context_states
+ * @SCI_RNC_INITIAL initial state for a remote node context. On a resume
+ * request the remote node context will transition to the posting state.
+ *
+ * @SCI_RNC_POSTING: transition state that posts the RNi to the hardware. Once
+ * the RNC is posted the remote node context will be made ready.
+ *
+ * @SCI_RNC_INVALIDATING: transition state that will post an RNC invalidate to
+ * the hardware. Once the invalidate is complete the remote node context will
+ * transition to the posting state.
+ *
+ * @SCI_RNC_RESUMING: transition state that will post an RNC resume to the
+ * hardare. Once the event notification of resume complete is received the
+ * remote node context will transition to the ready state.
+ *
+ * @SCI_RNC_READY: state that the remote node context must be in to accept io
+ * request operations.
+ *
+ * @SCI_RNC_TX_SUSPENDED: state that the remote node context transitions to when
+ * it gets a TX suspend notification from the hardware.
+ *
+ * @SCI_RNC_TX_RX_SUSPENDED: state that the remote node context transitions to
+ * when it gets a TX RX suspend notification from the hardware.
+ *
+ * @SCI_RNC_AWAIT_SUSPENSION: wait state for the remote node context that waits
+ * for a suspend notification from the hardware. This state is entered when
+ * either there is a request to supend the remote node context or when there is
+ * a TC completion where the remote node will be suspended by the hardware.
*/
-enum scis_sds_remote_node_context_states {
- /**
- * This state is the initial state for a remote node context. On a resume
- * request the remote node context will transition to the posting state.
- */
- SCI_RNC_INITIAL,
-
- /**
- * This is a transition state that posts the RNi to the hardware. Once the RNC
- * is posted the remote node context will be made ready.
- */
- SCI_RNC_POSTING,
-
- /**
- * This is a transition state that will post an RNC invalidate to the
- * hardware. Once the invalidate is complete the remote node context will
- * transition to the posting state.
- */
- SCI_RNC_INVALIDATING,
-
- /**
- * This is a transition state that will post an RNC resume to the hardare.
- * Once the event notification of resume complete is received the remote node
- * context will transition to the ready state.
- */
- SCI_RNC_RESUMING,
-
- /**
- * This is the state that the remote node context must be in to accept io
- * request operations.
- */
- SCI_RNC_READY,
-
- /**
- * This is the state that the remote node context transitions to when it gets
- * a TX suspend notification from the hardware.
- */
- SCI_RNC_TX_SUSPENDED,
-
- /**
- * This is the state that the remote node context transitions to when it gets
- * a TX RX suspend notification from the hardware.
- */
- SCI_RNC_TX_RX_SUSPENDED,
-
- /**
- * This state is a wait state for the remote node context that waits for a
- * suspend notification from the hardware. This state is entered when either
- * there is a request to supend the remote node context or when there is a TC
- * completion where the remote node will be suspended by the hardware.
- */
- SCI_RNC_AWAIT_SUSPENSION
-};
+#define RNC_STATES {\
+ C(RNC_INITIAL),\
+ C(RNC_POSTING),\
+ C(RNC_INVALIDATING),\
+ C(RNC_RESUMING),\
+ C(RNC_READY),\
+ C(RNC_TX_SUSPENDED),\
+ C(RNC_TX_RX_SUSPENDED),\
+ C(RNC_AWAIT_SUSPENSION),\
+ }
+#undef C
+#define C(a) SCI_##a
+enum scis_sds_remote_node_context_states RNC_STATES;
+#undef C
+const char *rnc_state_name(enum scis_sds_remote_node_context_states state);
/**
*
diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c
index 1a39ce5..ab18ee0fe 100644
--- a/drivers/scsi/isci/request.c
+++ b/drivers/scsi/isci/request.c
@@ -61,6 +61,16 @@
#include "scu_event_codes.h"
#include "sas.h"
+#undef C
+#define C(a) (#a)
+const char *req_state_name(enum sci_base_request_states state)
+{
+ static const char * const strings[] = REQUEST_STATES;
+
+ return strings[state];
+}
+#undef C
+
static struct scu_sgl_element_pair *to_sgl_element_pair(struct isci_request *ireq,
int idx)
{
@@ -910,7 +920,8 @@ enum sci_status sci_request_complete(struct isci_request *ireq)
state = ireq->sm.current_state_id;
if (WARN_ONCE(state != SCI_REQ_COMPLETED,
- "isci: request completion from wrong state (%d)\n", state))
+ "isci: request completion from wrong state (%s)\n",
+ req_state_name(state)))
return SCI_FAILURE_INVALID_STATE;
if (ireq->saved_rx_frame_index != SCU_INVALID_FRAME_INDEX)
@@ -931,8 +942,8 @@ enum sci_status sci_io_request_event_handler(struct isci_request *ireq,
state = ireq->sm.current_state_id;
if (state != SCI_REQ_STP_PIO_DATA_IN) {
- dev_warn(&ihost->pdev->dev, "%s: (%x) in wrong state %d\n",
- __func__, event_code, state);
+ dev_warn(&ihost->pdev->dev, "%s: (%x) in wrong state %s\n",
+ __func__, event_code, req_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
@@ -2306,12 +2317,8 @@ sci_io_request_tc_completion(struct isci_request *ireq,
return atapi_data_tc_completion_handler(ireq, completion_code);
default:
- dev_warn(&ihost->pdev->dev,
- "%s: SCIC IO Request given task completion "
- "notification %x while in wrong state %d\n",
- __func__,
- completion_code,
- state);
+ dev_warn(&ihost->pdev->dev, "%s: %x in wrong state %s\n",
+ __func__, completion_code, req_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
}
diff --git a/drivers/scsi/isci/request.h b/drivers/scsi/isci/request.h
index bcf2f37..057f237 100644
--- a/drivers/scsi/isci/request.h
+++ b/drivers/scsi/isci/request.h
@@ -182,134 +182,103 @@ static inline struct isci_request *to_ireq(struct isci_stp_request *stp_req)
}
/**
- * enum sci_base_request_states - This enumeration depicts all the states for
- * the common request state machine.
+ * enum sci_base_request_states - request state machine states
*
+ * @SCI_REQ_INIT: Simply the initial state for the base request state machine.
*
+ * @SCI_REQ_CONSTRUCTED: This state indicates that the request has been
+ * constructed. This state is entered from the INITIAL state.
+ *
+ * @SCI_REQ_STARTED: This state indicates that the request has been started.
+ * This state is entered from the CONSTRUCTED state.
+ *
+ * @SCI_REQ_STP_UDMA_WAIT_TC_COMP:
+ * @SCI_REQ_STP_UDMA_WAIT_D2H:
+ * @SCI_REQ_STP_NON_DATA_WAIT_H2D:
+ * @SCI_REQ_STP_NON_DATA_WAIT_D2H:
+ *
+ * @SCI_REQ_STP_PIO_WAIT_H2D: While in this state the IO request object is
+ * waiting for the TC completion notification for the H2D Register FIS
+ *
+ * @SCI_REQ_STP_PIO_WAIT_FRAME: While in this state the IO request object is
+ * waiting for either a PIO Setup FIS or a D2H register FIS. The type of frame
+ * received is based on the result of the prior frame and line conditions.
+ *
+ * @SCI_REQ_STP_PIO_DATA_IN: While in this state the IO request object is
+ * waiting for a DATA frame from the device.
+ *
+ * @SCI_REQ_STP_PIO_DATA_OUT: While in this state the IO request object is
+ * waiting to transmit the next data frame to the device.
+ *
+ * @SCI_REQ_ATAPI_WAIT_H2D: While in this state the IO request object is
+ * waiting for the TC completion notification for the H2D Register FIS
+ *
+ * @SCI_REQ_ATAPI_WAIT_PIO_SETUP: While in this state the IO request object is
+ * waiting for either a PIO Setup.
+ *
+ * @SCI_REQ_ATAPI_WAIT_D2H: The non-data IO transit to this state in this state
+ * after receiving TC completion. While in this state IO request object is
+ * waiting for D2H status frame as UF.
+ *
+ * @SCI_REQ_ATAPI_WAIT_TC_COMP: When transmitting raw frames hardware reports
+ * task context completion after every frame submission, so in the
+ * non-accelerated case we need to expect the completion for the "cdb" frame.
+ *
+ * @SCI_REQ_TASK_WAIT_TC_COMP: The AWAIT_TC_COMPLETION sub-state indicates that
+ * the started raw task management request is waiting for the transmission of
+ * the initial frame (i.e. command, task, etc.).
+ *
+ * @SCI_REQ_TASK_WAIT_TC_RESP: This sub-state indicates that the started task
+ * management request is waiting for the reception of an unsolicited frame
+ * (i.e. response IU).
+ *
+ * @SCI_REQ_SMP_WAIT_RESP: This sub-state indicates that the started task
+ * management request is waiting for the reception of an unsolicited frame
+ * (i.e. response IU).
+ *
+ * @SCI_REQ_SMP_WAIT_TC_COMP: The AWAIT_TC_COMPLETION sub-state indicates that
+ * the started SMP request is waiting for the transmission of the initial frame
+ * (i.e. command, task, etc.).
+ *
+ * @SCI_REQ_COMPLETED: This state indicates that the request has completed.
+ * This state is entered from the STARTED state. This state is entered from the
+ * ABORTING state.
+ *
+ * @SCI_REQ_ABORTING: This state indicates that the request is in the process
+ * of being terminated/aborted. This state is entered from the CONSTRUCTED
+ * state. This state is entered from the STARTED state.
+ *
+ * @SCI_REQ_FINAL: Simply the final state for the base request state machine.
*/
-enum sci_base_request_states {
- /*
- * Simply the initial state for the base request state machine.
- */
- SCI_REQ_INIT,
-
- /*
- * This state indicates that the request has been constructed.
- * This state is entered from the INITIAL state.
- */
- SCI_REQ_CONSTRUCTED,
-
- /*
- * This state indicates that the request has been started. This state
- * is entered from the CONSTRUCTED state.
- */
- SCI_REQ_STARTED,
-
- SCI_REQ_STP_UDMA_WAIT_TC_COMP,
- SCI_REQ_STP_UDMA_WAIT_D2H,
-
- SCI_REQ_STP_NON_DATA_WAIT_H2D,
- SCI_REQ_STP_NON_DATA_WAIT_D2H,
-
- /*
- * While in this state the IO request object is waiting for the TC
- * completion notification for the H2D Register FIS
- */
- SCI_REQ_STP_PIO_WAIT_H2D,
-
- /*
- * While in this state the IO request object is waiting for either a
- * PIO Setup FIS or a D2H register FIS. The type of frame received is
- * based on the result of the prior frame and line conditions.
- */
- SCI_REQ_STP_PIO_WAIT_FRAME,
-
- /*
- * While in this state the IO request object is waiting for a DATA
- * frame from the device.
- */
- SCI_REQ_STP_PIO_DATA_IN,
-
- /*
- * While in this state the IO request object is waiting to transmit
- * the next data frame to the device.
- */
- SCI_REQ_STP_PIO_DATA_OUT,
-
- /*
- * While in this state the IO request object is waiting for the TC
- * completion notification for the H2D Register FIS
- */
- SCI_REQ_ATAPI_WAIT_H2D,
-
- /*
- * While in this state the IO request object is waiting for either a
- * PIO Setup.
- */
- SCI_REQ_ATAPI_WAIT_PIO_SETUP,
-
- /*
- * The non-data IO transit to this state in this state after receiving
- * TC completion. While in this state IO request object is waiting for
- * D2H status frame as UF.
- */
- SCI_REQ_ATAPI_WAIT_D2H,
-
- /*
- * When transmitting raw frames hardware reports task context completion
- * after every frame submission, so in the non-accelerated case we need
- * to expect the completion for the "cdb" frame.
- */
- SCI_REQ_ATAPI_WAIT_TC_COMP,
-
- /*
- * The AWAIT_TC_COMPLETION sub-state indicates that the started raw
- * task management request is waiting for the transmission of the
- * initial frame (i.e. command, task, etc.).
- */
- SCI_REQ_TASK_WAIT_TC_COMP,
-
- /*
- * This sub-state indicates that the started task management request
- * is waiting for the reception of an unsolicited frame
- * (i.e. response IU).
- */
- SCI_REQ_TASK_WAIT_TC_RESP,
-
- /*
- * This sub-state indicates that the started task management request
- * is waiting for the reception of an unsolicited frame
- * (i.e. response IU).
- */
- SCI_REQ_SMP_WAIT_RESP,
-
- /*
- * The AWAIT_TC_COMPLETION sub-state indicates that the started SMP
- * request is waiting for the transmission of the initial frame
- * (i.e. command, task, etc.).
- */
- SCI_REQ_SMP_WAIT_TC_COMP,
-
- /*
- * This state indicates that the request has completed.
- * This state is entered from the STARTED state. This state is entered
- * from the ABORTING state.
- */
- SCI_REQ_COMPLETED,
-
- /*
- * This state indicates that the request is in the process of being
- * terminated/aborted.
- * This state is entered from the CONSTRUCTED state.
- * This state is entered from the STARTED state.
- */
- SCI_REQ_ABORTING,
-
- /*
- * Simply the final state for the base request state machine.
- */
- SCI_REQ_FINAL,
-};
+#define REQUEST_STATES {\
+ C(REQ_INIT),\
+ C(REQ_CONSTRUCTED),\
+ C(REQ_STARTED),\
+ C(REQ_STP_UDMA_WAIT_TC_COMP),\
+ C(REQ_STP_UDMA_WAIT_D2H),\
+ C(REQ_STP_NON_DATA_WAIT_H2D),\
+ C(REQ_STP_NON_DATA_WAIT_D2H),\
+ C(REQ_STP_PIO_WAIT_H2D),\
+ C(REQ_STP_PIO_WAIT_FRAME),\
+ C(REQ_STP_PIO_DATA_IN),\
+ C(REQ_STP_PIO_DATA_OUT),\
+ C(REQ_ATAPI_WAIT_H2D),\
+ C(REQ_ATAPI_WAIT_PIO_SETUP),\
+ C(REQ_ATAPI_WAIT_D2H),\
+ C(REQ_ATAPI_WAIT_TC_COMP),\
+ C(REQ_TASK_WAIT_TC_COMP),\
+ C(REQ_TASK_WAIT_TC_RESP),\
+ C(REQ_SMP_WAIT_RESP),\
+ C(REQ_SMP_WAIT_TC_COMP),\
+ C(REQ_COMPLETED),\
+ C(REQ_ABORTING),\
+ C(REQ_FINAL),\
+ }
+#undef C
+#define C(a) SCI_##a
+enum sci_base_request_states REQUEST_STATES;
+#undef C
+const char *req_state_name(enum sci_base_request_states state);
enum sci_status sci_request_start(struct isci_request *ireq);
enum sci_status sci_io_request_terminate(struct isci_request *ireq);
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