isci: move core/controller to host

Now that the data structures are unified unify the implementation in
host.[ch] and cleanup namespace pollution.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 575 insertions, 37 deletions

diff --git a/drivers/scsi/isci/host.h b/drivers/scsi/isci/host.h
index 13c1c99ef294..1f542c47fb3a 100644
--- a/drivers/scsi/isci/host.h
+++ b/drivers/scsi/isci/host.h
@@ -52,13 +52,258 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-
 #ifndef _SCI_HOST_H_
 #define _SCI_HOST_H_
 
-#include "scic_sds_controller.h"
+#include "scic_config_parameters.h"
 #include "remote_device.h"
 #include "phy.h"
+#include "pool.h"
+#include "sci_base_state_machine.h"
+#include "remote_node_table.h"
+#include "scu_registers.h"
+#include "scu_unsolicited_frame.h"
+#include "scic_sds_unsolicited_frame_control.h"
+#include "scic_sds_port_configuration_agent.h"
+
+struct scic_sds_request;
+struct scu_task_context;
+
+/**
+ * struct scic_power_control -
+ *
+ * This structure defines the fields for managing power control for direct
+ * attached disk devices.
+ */
+struct scic_power_control {
+	/**
+	 * This field is set when the power control timer is running and cleared when
+	 * it is not.
+	 */
+	bool timer_started;
+
+	/**
+	 * This field is the handle to the driver timer object.  This timer is used to
+	 * control when the directed attached disks can consume power.
+	 */
+	void *timer;
+
+	/**
+	 * This field is used to keep track of how many phys are put into the
+	 * requesters field.
+	 */
+	u8 phys_waiting;
+
+	/**
+	 * This field is used to keep track of how many phys have been granted to consume power
+	 */
+	u8 phys_granted_power;
+
+	/**
+	 * This field is an array of phys that we are waiting on. The phys are direct
+	 * mapped into requesters via struct scic_sds_phy.phy_index
+	 */
+	struct scic_sds_phy *requesters[SCI_MAX_PHYS];
+
+};
+
+/**
+ * struct scic_sds_controller -
+ *
+ * This structure represents the SCU controller object.
+ */
+struct scic_sds_controller {
+	/**
+	 * This field contains the information for the base controller state
+	 * machine.
+	 */
+	struct sci_base_state_machine state_machine;
+
+	/**
+	 * This field is the driver timer object handler used to time the controller
+	 * object start and stop requests.
+	 */
+	void *timeout_timer;
+
+	/**
+	 * This field contains the user parameters to be utilized for this
+	 * core controller object.
+	 */
+	union scic_user_parameters user_parameters;
+
+	/**
+	 * This field contains the OEM parameters to be utilized for this
+	 * core controller object.
+	 */
+	union scic_oem_parameters oem_parameters;
+
+	/**
+	 * This field contains the port configuration agent for this controller.
+	 */
+	struct scic_sds_port_configuration_agent port_agent;
+
+	/**
+	 * This field is the array of device objects that are currently constructed
+	 * for this controller object.  This table is used as a fast lookup of device
+	 * objects that need to handle device completion notifications from the
+	 * hardware. The table is RNi based.
+	 */
+	struct scic_sds_remote_device *device_table[SCI_MAX_REMOTE_DEVICES];
+
+	/**
+	 * This field is the array of IO request objects that are currently active for
+	 * this controller object.  This table is used as a fast lookup of the io
+	 * request object that need to handle completion queue notifications.  The
+	 * table is TCi based.
+	 */
+	struct scic_sds_request *io_request_table[SCI_MAX_IO_REQUESTS];
+
+	/**
+	 * This field is the free RNi data structure
+	 */
+	struct scic_remote_node_table available_remote_nodes;
+
+	/**
+	 * This field is the TCi pool used to manage the task context index.
+	 */
+	SCI_POOL_CREATE(tci_pool, u16, SCI_MAX_IO_REQUESTS);
+
+	/**
+	 * This filed is the struct scic_power_control data used to controll when direct
+	 * attached devices can consume power.
+	 */
+	struct scic_power_control power_control;
+
+	/**
+	 * This field is the array of sequence values for the IO Tag fields.  Even
+	 * though only 4 bits of the field is used for the sequence the sequence is 16
+	 * bits in size so the sequence can be bitwise or'd with the TCi to build the
+	 * IO Tag value.
+	 */
+	u16 io_request_sequence[SCI_MAX_IO_REQUESTS];
+
+	/**
+	 * This field in the array of sequence values for the RNi.  These are used
+	 * to control io request build to io request start operations.  The sequence
+	 * value is recorded into an io request when it is built and is checked on
+	 * the io request start operation to make sure that there was not a device
+	 * hot plug between the build and start operation.
+	 */
+	u8 remote_device_sequence[SCI_MAX_REMOTE_DEVICES];
+
+	/**
+	 * This field is a pointer to the memory allocated by the driver for the task
+	 * context table.  This data is shared between the hardware and software.
+	 */
+	struct scu_task_context *task_context_table;
+
+	/**
+	 * This field is a pointer to the memory allocated by the driver for the
+	 * remote node context table.  This table is shared between the hardware and
+	 * software.
+	 */
+	union scu_remote_node_context *remote_node_context_table;
+
+	/**
+	 * This field is a pointer to the completion queue.  This memory is
+	 * written to by the hardware and read by the software.
+	 */
+	u32 *completion_queue;
+
+	/**
+	 * This field is the software copy of the completion queue get pointer.  The
+	 * controller object writes this value to the hardware after processing the
+	 * completion entries.
+	 */
+	u32 completion_queue_get;
+
+	/**
+	 * This field is the minimum of the number of hardware supported port entries
+	 * and the software requested port entries.
+	 */
+	u32 logical_port_entries;
+
+	/**
+	 * This field is the minimum number of hardware supported completion queue
+	 * entries and the software requested completion queue entries.
+	 */
+	u32 completion_queue_entries;
+
+	/**
+	 * This field is the minimum number of hardware supported event entries and
+	 * the software requested event entries.
+	 */
+	u32 completion_event_entries;
+
+	/**
+	 * This field is the minimum number of devices supported by the hardware and
+	 * the number of devices requested by the software.
+	 */
+	u32 remote_node_entries;
+
+	/**
+	 * This field is the minimum number of IO requests supported by the hardware
+	 * and the number of IO requests requested by the software.
+	 */
+	u32 task_context_entries;
+
+	/**
+	 * This object contains all of the unsolicited frame specific
+	 * data utilized by the core controller.
+	 */
+	struct scic_sds_unsolicited_frame_control uf_control;
+
+	/* Phy Startup Data */
+	/**
+	 * This field is the driver timer handle for controller phy request startup.
+	 * On controller start the controller will start each PHY individually in
+	 * order of phy index.
+	 */
+	void *phy_startup_timer;
+
+	/**
+	 * This field is set when the phy_startup_timer is running and is cleared when
+	 * the phy_startup_timer is stopped.
+	 */
+	bool phy_startup_timer_pending;
+
+	/**
+	 * This field is the index of the next phy start.  It is initialized to 0 and
+	 * increments for each phy index that is started.
+	 */
+	u32 next_phy_to_start;
+
+	/**
+	 * This field controlls the invalid link up notifications to the SCI_USER.  If
+	 * an invalid_link_up notification is reported a bit for the PHY index is set
+	 * so further notifications are not made.  Once the PHY object reports link up
+	 * and is made part of a port then this bit for the PHY index is cleared.
+	 */
+	u8 invalid_phy_mask;
+
+	/*
+	 * This field saves the current interrupt coalescing number of the controller.
+	 */
+	u16 interrupt_coalesce_number;
+
+	/*
+	 * This field saves the current interrupt coalescing timeout value in microseconds.
+	 */
+	u32 interrupt_coalesce_timeout;
+
+	/**
+	 * This field is a pointer to the memory mapped register space for the
+	 * struct smu_registers.
+	 */
+	struct smu_registers __iomem *smu_registers;
+
+	/**
+	 * This field is a pointer to the memory mapped register space for the
+	 * struct scu_registers.
+	 */
+	struct scu_registers __iomem *scu_registers;
+
+};
 
 struct isci_host {
 	struct scic_sds_controller sci;
@@ -93,6 +338,96 @@ struct isci_host {
 };
 
 /**
+ * enum scic_sds_controller_states - This enumeration depicts all the states
+ *    for the common controller state machine.
+ */
+enum scic_sds_controller_states {
+	/**
+	 * Simply the initial state for the base controller state machine.
+	 */
+	SCI_BASE_CONTROLLER_STATE_INITIAL = 0,
+
+	/**
+	 * This state indicates that the controller is reset.  The memory for
+	 * the controller is in it's initial state, but the controller requires
+	 * initialization.
+	 * This state is entered from the INITIAL state.
+	 * This state is entered from the RESETTING state.
+	 */
+	SCI_BASE_CONTROLLER_STATE_RESET,
+
+	/**
+	 * This state is typically an action state that indicates the controller
+	 * is in the process of initialization.  In this state no new IO operations
+	 * are permitted.
+	 * This state is entered from the RESET state.
+	 */
+	SCI_BASE_CONTROLLER_STATE_INITIALIZING,
+
+	/**
+	 * This state indicates that the controller has been successfully
+	 * initialized.  In this state no new IO operations are permitted.
+	 * This state is entered from the INITIALIZING state.
+	 */
+	SCI_BASE_CONTROLLER_STATE_INITIALIZED,
+
+	/**
+	 * This state indicates the the controller 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 INITIALIZED state.
+	 */
+	SCI_BASE_CONTROLLER_STATE_STARTING,
+
+	/**
+	 * This state indicates the controller is now ready.  Thus, the user
+	 * is able to perform IO operations on the controller.
+	 * This state is entered from the STARTING state.
+	 */
+	SCI_BASE_CONTROLLER_STATE_READY,
+
+	/**
+	 * This state is typically an action state that indicates the controller
+	 * is in the process of resetting.  Thus, the user is unable to perform
+	 * IO operations on the controller.  A reset is considered destructive in
+	 * most cases.
+	 * This state is entered from the READY state.
+	 * This state is entered from the FAILED state.
+	 * This state is entered from the STOPPED state.
+	 */
+	SCI_BASE_CONTROLLER_STATE_RESETTING,
+
+	/**
+	 * This state indicates that the controller 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_BASE_CONTROLLER_STATE_STOPPING,
+
+	/**
+	 * This state indicates that the controller has successfully been stopped.
+	 * In this state no new IO operations are permitted.
+	 * This state is entered from the STOPPING state.
+	 */
+	SCI_BASE_CONTROLLER_STATE_STOPPED,
+
+	/**
+	 * This state indicates that the controller could not successfully be
+	 * initialized.  In this state no new IO operations are permitted.
+	 * This state is entered from the INITIALIZING state.
+	 * This state is entered from the STARTING state.
+	 * This state is entered from the STOPPING state.
+	 * This state is entered from the RESETTING state.
+	 */
+	SCI_BASE_CONTROLLER_STATE_FAILED,
+
+	SCI_BASE_CONTROLLER_MAX_STATES
+
+};
+
+
+
+/**
  * struct isci_pci_info - This class represents the pci function containing the
  *    controllers. Depending on PCI SKU, there could be up to 2 controllers in
  *    the PCI function.
@@ -115,17 +450,13 @@ static inline struct isci_pci_info *to_pci_info(struct pci_dev *pdev)
 	     id < ARRAY_SIZE(to_pci_info(pdev)->hosts) && ihost; \
 	     ihost = to_pci_info(pdev)->hosts[++id])
 
-static inline
-enum isci_status isci_host_get_state(
-	struct isci_host *isci_host)
+static inline enum isci_status isci_host_get_state(struct isci_host *isci_host)
 {
 	return isci_host->status;
 }
 
-
-static inline void isci_host_change_state(
-	struct isci_host *isci_host,
-	enum isci_status status)
+static inline void isci_host_change_state(struct isci_host *isci_host,
+					  enum isci_status status)
 {
 	unsigned long flags;
 
@@ -140,9 +471,7 @@ static inline void isci_host_change_state(
 
 }
 
-static inline int isci_host_can_queue(
-	struct isci_host *isci_host,
-	int num)
+static inline int isci_host_can_queue(struct isci_host *isci_host, int num)
 {
 	int ret = 0;
 	unsigned long flags;
@@ -163,9 +492,7 @@ static inline int isci_host_can_queue(
 	return ret;
 }
 
-static inline void isci_host_can_dequeue(
-	struct isci_host *isci_host,
-	int num)
+static inline void isci_host_can_dequeue(struct isci_host *isci_host, int num)
 {
 	unsigned long flags;
 
@@ -208,39 +535,219 @@ static inline struct isci_host *scic_to_ihost(struct scic_sds_controller *scic)
 }
 
 /**
- * isci_host_scan_finished() -
+ * INCREMENT_QUEUE_GET() -
  *
- * This function is one of the SCSI Host Template functions. The SCSI midlayer
- * calls this function during a target scan, approx. once every 10 millisecs.
+ * This macro will increment the specified index to and if the index wraps to 0
+ * it will toggel the cycle bit.
  */
-int isci_host_scan_finished(
-	struct Scsi_Host *,
-	unsigned long);
+#define INCREMENT_QUEUE_GET(index, cycle, entry_count, bit_toggle) \
+	{ \
+		if ((index) + 1 == entry_count) {	\
+			(index) = 0; \
+			(cycle) = (cycle) ^ (bit_toggle); \
+		} else { \
+			index = index + 1; \
+		} \
+	}
 
+/**
+ * scic_sds_controller_get_port_configuration_agent() -
+ *
+ * This is a helper macro to get the port configuration agent from the
+ * controller object.
+ */
+#define scic_sds_controller_get_port_configuration_agent(controller) \
+	(&(controller)->port_agent)
 
 /**
- * isci_host_scan_start() -
+ * scic_sds_controller_get_protocol_engine_group() -
  *
- * This function is one of the SCSI Host Template function, called by the SCSI
- * mid layer berfore a target scan begins. The core library controller start
- * routine is called from here.
+ * This macro returns the protocol engine group for this controller object.
+ * Presently we only support protocol engine group 0 so just return that
  */
-void isci_host_scan_start(
-	struct Scsi_Host *);
+#define scic_sds_controller_get_protocol_engine_group(controller) 0
 
 /**
- * isci_host_start_complete() -
+ * scic_sds_io_tag_construct() -
  *
- * This function is called by the core library, through the ISCI Module, to
- * indicate controller start status.
+ * This macro constructs an IO tag from the sequence and index values.
  */
-void isci_host_start_complete(
-	struct isci_host *,
-	enum sci_status);
+#define scic_sds_io_tag_construct(sequence, task_index)	\
+	((sequence) << 12 | (task_index))
 
-void isci_host_stop_complete(
-	struct isci_host *isci_host,
-	enum sci_status completion_status);
+/**
+ * scic_sds_io_tag_get_sequence() -
+ *
+ * This macro returns the IO sequence from the IO tag value.
+ */
+#define scic_sds_io_tag_get_sequence(io_tag) \
+	(((io_tag) & 0xF000) >> 12)
+
+/**
+ * scic_sds_io_tag_get_index() -
+ *
+ * This macro returns the TCi from the io tag value
+ */
+#define scic_sds_io_tag_get_index(io_tag) \
+	((io_tag) & 0x0FFF)
+
+/**
+ * scic_sds_io_sequence_increment() -
+ *
+ * This is a helper macro to increment the io sequence count. We may find in
+ * the future that it will be faster to store the sequence count in such a way
+ * as we dont perform the shift operation to build io tag values so therefore
+ * need a way to incrment them correctly
+ */
+#define scic_sds_io_sequence_increment(value) \
+	((value) = (((value) + 1) & 0x000F))
+
+/* expander attached sata devices require 3 rnc slots */
+static inline int scic_sds_remote_device_node_count(struct scic_sds_remote_device *sci_dev)
+{
+	struct domain_device *dev = sci_dev_to_domain(sci_dev);
+
+	if ((dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) &&
+	    !sci_dev->is_direct_attached)
+		return SCU_STP_REMOTE_NODE_COUNT;
+	return SCU_SSP_REMOTE_NODE_COUNT;
+}
+
+/**
+ * scic_sds_controller_set_invalid_phy() -
+ *
+ * This macro will set the bit in the invalid phy mask for this controller
+ * object.  This is used to control messages reported for invalid link up
+ * notifications.
+ */
+#define scic_sds_controller_set_invalid_phy(controller, phy) \
+	((controller)->invalid_phy_mask |= (1 << (phy)->phy_index))
+
+/**
+ * scic_sds_controller_clear_invalid_phy() -
+ *
+ * This macro will clear the bit in the invalid phy mask for this controller
+ * object.  This is used to control messages reported for invalid link up
+ * notifications.
+ */
+#define scic_sds_controller_clear_invalid_phy(controller, phy) \
+	((controller)->invalid_phy_mask &= ~(1 << (phy)->phy_index))
+
+static inline struct device *scic_to_dev(struct scic_sds_controller *scic)
+{
+	return &scic_to_ihost(scic)->pdev->dev;
+}
+
+static inline struct device *sciphy_to_dev(struct scic_sds_phy *sci_phy)
+{
+	struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
+
+	if (!iphy || !iphy->isci_port || !iphy->isci_port->isci_host)
+		return NULL;
+
+	return &iphy->isci_port->isci_host->pdev->dev;
+}
+
+static inline struct device *sciport_to_dev(struct scic_sds_port *sci_port)
+{
+	struct isci_port *iport = sci_port_to_iport(sci_port);
+
+	if (!iport || !iport->isci_host)
+		return NULL;
+
+	return &iport->isci_host->pdev->dev;
+}
+
+static inline struct device *scirdev_to_dev(struct scic_sds_remote_device *sci_dev)
+{
+	struct isci_remote_device *idev =
+			container_of(sci_dev, typeof(*idev), sci);
+
+	if (!idev || !idev->isci_port || !idev->isci_port->isci_host)
+		return NULL;
+
+	return &idev->isci_port->isci_host->pdev->dev;
+}
+
+enum {
+	ISCI_SI_REVA0,
+	ISCI_SI_REVA2,
+	ISCI_SI_REVB0,
+};
+
+extern int isci_si_rev;
+
+static inline bool is_a0(void)
+{
+	return isci_si_rev == ISCI_SI_REVA0;
+}
+
+static inline bool is_a2(void)
+{
+	return isci_si_rev == ISCI_SI_REVA2;
+}
+
+static inline bool is_b0(void)
+{
+	return isci_si_rev > ISCI_SI_REVA2;
+}
+
+void scic_sds_controller_post_request(struct scic_sds_controller *scic,
+				      u32 request);
+void scic_sds_controller_release_frame(struct scic_sds_controller *scic,
+				       u32 frame_index);
+void scic_sds_controller_copy_sata_response(void *response_buffer,
+					    void *frame_header,
+					    void *frame_buffer);
+enum sci_status scic_sds_controller_allocate_remote_node_context(struct scic_sds_controller *scic,
+								 struct scic_sds_remote_device *sci_dev,
+								 u16 *node_id);
+void scic_sds_controller_free_remote_node_context(
+	struct scic_sds_controller *scic,
+	struct scic_sds_remote_device *sci_dev,
+	u16 node_id);
+union scu_remote_node_context *scic_sds_controller_get_remote_node_context_buffer(
+	struct scic_sds_controller *scic,
+	u16 node_id);
+
+struct scic_sds_request *scic_request_by_tag(struct scic_sds_controller *scic,
+					     u16 io_tag);
+
+struct scu_task_context *scic_sds_controller_get_task_context_buffer(
+	struct scic_sds_controller *scic,
+	u16 io_tag);
+
+void scic_sds_controller_power_control_queue_insert(
+	struct scic_sds_controller *scic,
+	struct scic_sds_phy *sci_phy);
+
+void scic_sds_controller_power_control_queue_remove(
+	struct scic_sds_controller *scic,
+	struct scic_sds_phy *sci_phy);
+
+void scic_sds_controller_link_up(
+	struct scic_sds_controller *scic,
+	struct scic_sds_port *sci_port,
+	struct scic_sds_phy *sci_phy);
+
+void scic_sds_controller_link_down(
+	struct scic_sds_controller *scic,
+	struct scic_sds_port *sci_port,
+	struct scic_sds_phy *sci_phy);
+
+void scic_sds_controller_remote_device_stopped(
+	struct scic_sds_controller *scic,
+	struct scic_sds_remote_device *sci_dev);
+
+void scic_sds_controller_copy_task_context(
+	struct scic_sds_controller *scic,
+	struct scic_sds_request *this_request);
+
+void scic_sds_controller_register_setup(struct scic_sds_controller *scic);
+
+enum sci_status scic_controller_continue_io(struct scic_sds_request *sci_req);
+int isci_host_scan_finished(struct Scsi_Host *, unsigned long);
+void isci_host_scan_start(struct Scsi_Host *);
 
 int isci_host_init(struct isci_host *);
 
@@ -262,4 +769,35 @@ void isci_host_remote_device_start_complete(
 	struct isci_remote_device *,
 	enum sci_status);
 
-#endif /* !defined(_SCI_HOST_H_) */
+void scic_controller_disable_interrupts(
+	struct scic_sds_controller *scic);
+
+enum sci_status scic_controller_start_io(
+	struct scic_sds_controller *scic,
+	struct scic_sds_remote_device *remote_device,
+	struct scic_sds_request *io_request,
+	u16 io_tag);
+
+enum sci_task_status scic_controller_start_task(
+	struct scic_sds_controller *scic,
+	struct scic_sds_remote_device *remote_device,
+	struct scic_sds_request *task_request,
+	u16 io_tag);
+
+enum sci_status scic_controller_terminate_request(
+	struct scic_sds_controller *scic,
+	struct scic_sds_remote_device *remote_device,
+	struct scic_sds_request *request);
+
+enum sci_status scic_controller_complete_io(
+	struct scic_sds_controller *scic,
+	struct scic_sds_remote_device *remote_device,
+	struct scic_sds_request *io_request);
+
+u16 scic_controller_allocate_io_tag(
+	struct scic_sds_controller *scic);
+
+enum sci_status scic_controller_free_io_tag(
+	struct scic_sds_controller *scic,
+	u16 io_tag);
+#endif