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, 229 insertions, 0 deletions

diff --git a/drivers/scsi/isci/scu_remote_node_context.h b/drivers/scsi/isci/scu_remote_node_context.h
new file mode 100644
index 000000000000..33745adc826b
--- /dev/null
+++ b/drivers/scsi/isci/scu_remote_node_context.h
@@ -0,0 +1,229 @@
+/*
+ * 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 __SCU_REMOTE_NODE_CONTEXT_HEADER__
+#define __SCU_REMOTE_NODE_CONTEXT_HEADER__
+
+/**
+ * This file contains the structures and constatns used by the SCU hardware to
+ *    describe a remote node context.
+ *
+ *
+ */
+
+/**
+ * struct ssp_remote_node_context - This structure contains the SCU hardware
+ *    definition for an SSP remote node.
+ *
+ *
+ */
+struct ssp_remote_node_context {
+        /* WORD 0 */
+
+        /**
+         * This field is the remote node index assigned for this remote node. All
+         * remote nodes must have a unique remote node index. The value of the remote
+         * node index can not exceed the maximum number of remote nodes reported in
+         * the SCU device context capacity register.
+         */
+        u32 remote_node_index:12;
+        u32 reserved0_1:4;
+
+        /**
+         * This field tells the SCU hardware how many simultaneous connections that
+         * this remote node will support.
+         */
+        u32 remote_node_port_width:4;
+
+        /**
+         * This field tells the SCU hardware which logical port to associate with this
+         * remote node.
+         */
+        u32 logical_port_index:3;
+        u32 reserved0_2:5;
+
+        /**
+         * This field will enable the I_T nexus loss timer for this remote node.
+         */
+        u32 nexus_loss_timer_enable:1;
+
+        /**
+         * This field is the for driver debug only and is not used.
+         */
+        u32 check_bit:1;
+
+        /**
+         * This field must be set to true when the hardware DMAs the remote node
+         * context to the hardware SRAM.  When the remote node is being invalidated
+         * this field must be set to false.
+         */
+        u32 is_valid:1;
+
+        /**
+         * This field must be set to true.
+         */
+        u32 is_remote_node_context:1;
+
+        /* WORD 1 - 2 */
+
+        /**
+         * This is the low word of the remote device SAS Address
+         */
+        u32 remote_sas_address_lo;
+
+        /**
+         * This field is the high word of the remote device SAS Address
+         */
+        u32 remote_sas_address_hi;
+
+        /* WORD 3 */
+        /**
+         * This field reprensets the function number assigned to this remote device.
+         * This value must match the virtual function number that is being used to
+         * communicate to the device.
+         */
+        u32 function_number:8;
+        u32 reserved3_1:8;
+
+        /**
+         * This field provides the driver a way to cheat on the arbitration wait time
+         * for this remote node.
+         */
+        u32 arbitration_wait_time:16;
+
+        /* WORD 4 */
+        /**
+         * This field tells the SCU hardware how long this device may occupy the
+         * connection before it must be closed.
+         */
+        u32 connection_occupancy_timeout:16;
+
+        /**
+         * This field tells the SCU hardware how long to maintain a connection when
+         * there are no frames being transmitted on the link.
+         */
+        u32 connection_inactivity_timeout:16;
+
+        /* WORD  5 */
+        /**
+         * This field allows the driver to cheat on the arbitration wait time for this
+         * remote node.
+         */
+        u32 initial_arbitration_wait_time:16;
+
+        /**
+         * This field is tells the hardware what to program for the connection rate in
+         * the open address frame.  See the SAS spec for valid values.
+         */
+        u32 oaf_connection_rate:4;
+
+        /**
+         * This field tells the SCU hardware what to program for the features in the
+         * open address frame.  See the SAS spec for valid values.
+         */
+        u32 oaf_features:4;
+
+        /**
+         * This field tells the SCU hardware what to use for the source zone group in
+         * the open address frame.  See the SAS spec for more details on zoning.
+         */
+        u32 oaf_source_zone_group:8;
+
+        /* WORD 6 */
+        /**
+         * This field tells the SCU hardware what to use as the more capibilities in
+         * the open address frame. See the SAS Spec for details.
+         */
+        u32 oaf_more_compatibility_features;
+
+        /* WORD 7 */
+        u32 reserved7;
+
+};
+
+/**
+ * struct stp_remote_node_context - This structure contains the SCU hardware
+ *    definition for a STP remote node.
+ *
+ * STP Targets are not yet supported so this definition is a placeholder until
+ * we do support them.
+ */
+struct stp_remote_node_context {
+        /**
+         * Placeholder data for the STP remote node.
+         */
+        u32 data[8];
+
+};
+
+/**
+ * This union combines the SAS and SATA remote node definitions.
+ *
+ * union scu_remote_node_context
+ */
+union scu_remote_node_context {
+        /**
+         * SSP Remote Node
+         */
+        struct ssp_remote_node_context ssp;
+
+        /**
+         * STP Remote Node
+         */
+        struct stp_remote_node_context stp;
+
+};
+
+#endif /* __SCU_REMOTE_NODE_CONTEXT_HEADER__ */