isci: move remote_device handling out of the core

Now that the core/lldd remote_device data structures are nominally unified
merge the corresponding sources into the top-level directory.  Also move the
remote_node_context infrastructure which has no analog at the lldd level.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 301 insertions, 0 deletions

diff --git a/drivers/scsi/isci/remote_node_context.h b/drivers/scsi/isci/remote_node_context.h
new file mode 100644
index 00000000000..b3f2546090d
--- /dev/null
+++ b/drivers/scsi/isci/remote_node_context.h
@@ -0,0 +1,301 @@
+/*
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in
+ *     the documentation and/or other materials provided with the
+ *     distribution.
+ *   * Neither the name of Intel Corporation nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (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 _SCIC_SDS_REMOTE_NODE_CONTEXT_H_
+#define _SCIC_SDS_REMOTE_NODE_CONTEXT_H_
+
+/**
+ * This file contains the structures, constants, and prototypes associated with
+ *    the remote node context in the silicon.  It exists to model and manage
+ *    the remote node context in the silicon.
+ *
+ *
+ */
+
+#include "sci_base_state.h"
+#include "sci_base_state_machine.h"
+
+/**
+ *
+ *
+ * This constant represents an invalid remote device id, it is used to program
+ * the STPDARNI register so the driver knows when it has received a SIGNATURE
+ * FIS from the SCU.
+ */
+#define SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX    0x0FFF
+
+#define SCU_HARDWARE_SUSPENSION  (0)
+#define SCI_SOFTWARE_SUSPENSION  (1)
+
+struct scic_sds_request;
+struct scic_sds_remote_device;
+struct scic_sds_remote_node_context;
+
+typedef void (*scics_sds_remote_node_context_callback)(void *);
+
+typedef enum sci_status (*scic_sds_remote_node_context_operation)(
+        struct scic_sds_remote_node_context *sci_rnc,
+        scics_sds_remote_node_context_callback callback,
+        void *callback_parameter
+        );
+
+typedef enum sci_status (*scic_sds_remote_node_context_suspend_operation)(
+        struct scic_sds_remote_node_context *sci_rnc,
+        u32 suspension_type,
+        scics_sds_remote_node_context_callback callback,
+        void *callback_parameter
+        );
+
+typedef enum sci_status (*scic_sds_remote_node_context_io_request)(
+        struct scic_sds_remote_node_context *sci_rnc,
+        struct scic_sds_request *sci_req
+        );
+
+typedef enum sci_status (*scic_sds_remote_node_context_event_handler)(
+        struct scic_sds_remote_node_context *sci_rnc,
+        u32 event_code
+        );
+
+struct scic_sds_remote_node_context_handlers {
+        /**
+         * This handle is invoked to stop the RNC.  The callback is invoked when after
+         * the hardware notification that the RNC has been invalidated.
+         */
+        scic_sds_remote_node_context_operation destruct_handler;
+
+        /**
+         * This handler is invoked when there is a request to suspend  the RNC.  The
+         * callback is invoked after the hardware notification that the remote node is
+         * suspended.
+         */
+        scic_sds_remote_node_context_suspend_operation suspend_handler;
+
+        /**
+         * This handler is invoked when there is a request to resume the RNC.  The
+         * callback is invoked when after the RNC has reached the ready state.
+         */
+        scic_sds_remote_node_context_operation resume_handler;
+
+        /**
+         * This handler is invoked when there is a request to start an io request
+         * operation.
+         */
+        scic_sds_remote_node_context_io_request start_io_handler;
+
+        /**
+         * This handler is invoked when there is a request to start a task request
+         * operation.
+         */
+        scic_sds_remote_node_context_io_request start_task_handler;
+
+        /**
+         * This handler is invoked where there is an RNC event that must be processed.
+         */
+        scic_sds_remote_node_context_event_handler event_handler;
+
+};
+
+/**
+ * This is the enumeration of the remote node context states.
+ */
+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.
+         */
+        SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE,
+
+        /**
+         * 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.
+         */
+        SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE,
+
+        /**
+         * 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.
+         */
+        SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE,
+
+        /**
+         * 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.
+         */
+        SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE,
+
+        /**
+         * This is the state that the remote node context must be in to accept io
+         * request operations.
+         */
+        SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE,
+
+        /**
+         * This is the state that the remote node context transitions to when it gets
+         * a TX suspend notification from the hardware.
+         */
+        SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE,
+
+        /**
+         * This is the state that the remote node context transitions to when it gets
+         * a TX RX suspend notification from the hardware.
+         */
+        SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE,
+
+        /**
+         * 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.
+         */
+        SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE,
+
+        SCIC_SDS_REMOTE_NODE_CONTEXT_MAX_STATES
+
+};
+
+/**
+ *
+ *
+ * This enumeration is used to define the end destination state for the remote
+ * node context.
+ */
+enum scic_sds_remote_node_context_destination_state {
+        SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED,
+        SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY,
+        SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL
+};
+
+/**
+ * struct scic_sds_remote_node_context - This structure contains the data
+ *    associated with the remote node context object.  The remote node context
+ *    (RNC) object models the the remote device information necessary to manage
+ *    the silicon RNC.
+ */
+struct scic_sds_remote_node_context {
+        /*
+         * parent object
+         */
+        struct sci_base_object parent;
+
+        /**
+         * This field indicates the remote node index (RNI) associated with
+         * this RNC.
+         */
+        u16 remote_node_index;
+
+        /**
+         * This field is the recored suspension code or the reason for the remote node
+         * context suspension.
+         */
+        u32 suspension_code;
+
+        /**
+         * This field is true if the remote node context is resuming from its current
+         * state.  This can cause an automatic resume on receiving a suspension
+         * notification.
+         */
+        enum scic_sds_remote_node_context_destination_state destination_state;
+
+        /**
+         * This field contains the callback function that the user requested to be
+         * called when the requested state transition is complete.
+         */
+        scics_sds_remote_node_context_callback user_callback;
+
+        /**
+         * This field contains the parameter that is called when the user requested
+         * state transition is completed.
+         */
+        void *user_cookie;
+
+        /**
+         * This field contains the data for the object's state machine.
+         */
+        struct sci_base_state_machine state_machine;
+
+        struct scic_sds_remote_node_context_handlers *state_handlers;
+};
+
+void scic_sds_remote_node_context_construct(struct scic_sds_remote_node_context *rnc,
+                                            u16 remote_node_index);
+
+
+bool scic_sds_remote_node_context_is_ready(
+        struct scic_sds_remote_node_context *sci_rnc);
+
+#define scic_sds_remote_node_context_get_remote_node_index(rcn) \
+        ((rnc)->remote_node_index)
+
+#define scic_sds_remote_node_context_event_handler(rnc, event_code) \
+        ((rnc)->state_handlers->event_handler(rnc, event_code))
+
+#define scic_sds_remote_node_context_resume(rnc, callback, parameter) \
+        ((rnc)->state_handlers->resume_handler(rnc, callback, parameter))
+
+#define scic_sds_remote_node_context_suspend(rnc, suspend_type, callback, parameter) \
+        ((rnc)->state_handlers->suspend_handler(rnc, suspend_type, callback, parameter))
+
+#define scic_sds_remote_node_context_destruct(rnc, callback, parameter) \
+        ((rnc)->state_handlers->destruct_handler(rnc, callback, parameter))
+
+#define scic_sds_remote_node_context_start_io(rnc, request) \
+        ((rnc)->state_handlers->start_io_handler(rnc, request))
+
+#define scic_sds_remote_node_context_start_task(rnc, task) \
+        ((rnc)->state_handlers->start_task_handler(rnc, task))
+
+#endif  /* _SCIC_SDS_REMOTE_NODE_CONTEXT_H_ */