1 files changed, 538 insertions, 0 deletions

diff --git a/drivers/scsi/isci/isci.h b/drivers/scsi/isci/isci.h
new file mode 100644
index 000000000000..d1de63312e7f
--- /dev/null
+++ b/drivers/scsi/isci/isci.h
@@ -0,0 +1,538 @@
+/*
+ * 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 __ISCI_H__
+#define __ISCI_H__
+
+#include <linux/interrupt.h>
+#include <linux/types.h>
+
+#define DRV_NAME "isci"
+#define SCI_PCI_BAR_COUNT 2
+#define SCI_NUM_MSI_X_INT 2
+#define SCI_SMU_BAR       0
+#define SCI_SMU_BAR_SIZE  (16*1024)
+#define SCI_SCU_BAR       1
+#define SCI_SCU_BAR_SIZE  (4*1024*1024)
+#define SCI_IO_SPACE_BAR0 2
+#define SCI_IO_SPACE_BAR1 3
+#define ISCI_CAN_QUEUE_VAL 250 /* < SCI_MAX_IO_REQUESTS ? */
+#define SCIC_CONTROLLER_STOP_TIMEOUT 5000
+
+#define SCI_CONTROLLER_INVALID_IO_TAG 0xFFFF
+
+#define SCI_MAX_PHYS  (4UL)
+#define SCI_MAX_PORTS SCI_MAX_PHYS
+#define SCI_MAX_SMP_PHYS  (384) /* not silicon constrained */
+#define SCI_MAX_REMOTE_DEVICES (256UL)
+#define SCI_MAX_IO_REQUESTS (256UL)
+#define SCI_MAX_SEQ (16)
+#define SCI_MAX_MSIX_MESSAGES  (2)
+#define SCI_MAX_SCATTER_GATHER_ELEMENTS 130 /* not silicon constrained */
+#define SCI_MAX_CONTROLLERS 2
+#define SCI_MAX_DOMAINS  SCI_MAX_PORTS
+
+#define SCU_MAX_CRITICAL_NOTIFICATIONS    (384)
+#define SCU_MAX_EVENTS_SHIFT              (7)
+#define SCU_MAX_EVENTS                    (1 << SCU_MAX_EVENTS_SHIFT)
+#define SCU_MAX_UNSOLICITED_FRAMES        (128)
+#define SCU_MAX_COMPLETION_QUEUE_SCRATCH  (128)
+#define SCU_MAX_COMPLETION_QUEUE_ENTRIES  (SCU_MAX_CRITICAL_NOTIFICATIONS \
+                                           + SCU_MAX_EVENTS \
+                                           + SCU_MAX_UNSOLICITED_FRAMES \
+                                           + SCI_MAX_IO_REQUESTS \
+                                           + SCU_MAX_COMPLETION_QUEUE_SCRATCH)
+#define SCU_MAX_COMPLETION_QUEUE_SHIFT    (ilog2(SCU_MAX_COMPLETION_QUEUE_ENTRIES))
+
+#define SCU_ABSOLUTE_MAX_UNSOLICITED_FRAMES (4096)
+#define SCU_UNSOLICITED_FRAME_BUFFER_SIZE   (1024)
+#define SCU_INVALID_FRAME_INDEX             (0xFFFF)
+
+#define SCU_IO_REQUEST_MAX_SGE_SIZE         (0x00FFFFFF)
+#define SCU_IO_REQUEST_MAX_TRANSFER_LENGTH  (0x00FFFFFF)
+
+static inline void check_sizes(void)
+{
+        BUILD_BUG_ON_NOT_POWER_OF_2(SCU_MAX_EVENTS);
+        BUILD_BUG_ON(SCU_MAX_UNSOLICITED_FRAMES <= 8);
+        BUILD_BUG_ON_NOT_POWER_OF_2(SCU_MAX_UNSOLICITED_FRAMES);
+        BUILD_BUG_ON_NOT_POWER_OF_2(SCU_MAX_COMPLETION_QUEUE_ENTRIES);
+        BUILD_BUG_ON(SCU_MAX_UNSOLICITED_FRAMES > SCU_ABSOLUTE_MAX_UNSOLICITED_FRAMES);
+        BUILD_BUG_ON_NOT_POWER_OF_2(SCI_MAX_IO_REQUESTS);
+        BUILD_BUG_ON_NOT_POWER_OF_2(SCI_MAX_SEQ);
+}
+
+/**
+ * enum sci_status - This is the general return status enumeration for non-IO,
+ *    non-task management related SCI interface methods.
+ *
+ *
+ */
+enum sci_status {
+        /**
+         * This member indicates successful completion.
+         */
+        SCI_SUCCESS = 0,
+
+        /**
+         * This value indicates that the calling method completed successfully,
+         * but that the IO may have completed before having it's start method
+         * invoked.  This occurs during SAT translation for requests that do
+         * not require an IO to the target or for any other requests that may
+         * be completed without having to submit IO.
+         */
+        SCI_SUCCESS_IO_COMPLETE_BEFORE_START,
+
+        /**
+         *  This Value indicates that the SCU hardware returned an early response
+         *  because the io request specified more data than is returned by the
+         *  target device (mode pages, inquiry data, etc.). The completion routine
+         *  will handle this case to get the actual number of bytes transferred.
+         */
+        SCI_SUCCESS_IO_DONE_EARLY,
+
+        /**
+         * This member indicates that the object for which a state change is
+         * being requested is already in said state.
+         */
+        SCI_WARNING_ALREADY_IN_STATE,
+
+        /**
+         * This member indicates interrupt coalescence timer may cause SAS
+         * specification compliance issues (i.e. SMP target mode response
+         * frames must be returned within 1.9 milliseconds).
+         */
+        SCI_WARNING_TIMER_CONFLICT,
+
+        /**
+         * This field indicates a sequence of action is not completed yet. Mostly,
+         * this status is used when multiple ATA commands are needed in a SATI translation.
+         */
+        SCI_WARNING_SEQUENCE_INCOMPLETE,
+
+        /**
+         * This member indicates that there was a general failure.
+         */
+        SCI_FAILURE,
+
+        /**
+         * This member indicates that the SCI implementation is unable to complete
+         * an operation due to a critical flaw the prevents any further operation
+         * (i.e. an invalid pointer).
+         */
+        SCI_FATAL_ERROR,
+
+        /**
+         * This member indicates the calling function failed, because the state
+         * of the controller is in a state that prevents successful completion.
+         */
+        SCI_FAILURE_INVALID_STATE,
+
+        /**
+         * This member indicates the calling function failed, because there is
+         * insufficient resources/memory to complete the request.
+         */
+        SCI_FAILURE_INSUFFICIENT_RESOURCES,
+
+        /**
+         * This member indicates the calling function failed, because the
+         * controller object required for the operation can't be located.
+         */
+        SCI_FAILURE_CONTROLLER_NOT_FOUND,
+
+        /**
+         * This member indicates the calling function failed, because the
+         * discovered controller type is not supported by the library.
+         */
+        SCI_FAILURE_UNSUPPORTED_CONTROLLER_TYPE,
+
+        /**
+         * This member indicates the calling function failed, because the
+         * requested initialization data version isn't supported.
+         */
+        SCI_FAILURE_UNSUPPORTED_INIT_DATA_VERSION,
+
+        /**
+         * This member indicates the calling function failed, because the
+         * requested configuration of SAS Phys into SAS Ports is not supported.
+         */
+        SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION,
+
+        /**
+         * This member indicates the calling function failed, because the
+         * requested protocol is not supported by the remote device, port,
+         * or controller.
+         */
+        SCI_FAILURE_UNSUPPORTED_PROTOCOL,
+
+        /**
+         * This member indicates the calling function failed, because the
+         * requested information type is not supported by the SCI implementation.
+         */
+        SCI_FAILURE_UNSUPPORTED_INFORMATION_TYPE,
+
+        /**
+         * This member indicates the calling function failed, because the
+         * device already exists.
+         */
+        SCI_FAILURE_DEVICE_EXISTS,
+
+        /**
+         * This member indicates the calling function failed, because adding
+         * a phy to the object is not possible.
+         */
+        SCI_FAILURE_ADDING_PHY_UNSUPPORTED,
+
+        /**
+         * This member indicates the calling function failed, because the
+         * requested information type is not supported by the SCI implementation.
+         */
+        SCI_FAILURE_UNSUPPORTED_INFORMATION_FIELD,
+
+        /**
+         * This member indicates the calling function failed, because the SCI
+         * implementation does not support the supplied time limit.
+         */
+        SCI_FAILURE_UNSUPPORTED_TIME_LIMIT,
+
+        /**
+         * This member indicates the calling method failed, because the SCI
+         * implementation does not contain the specified Phy.
+         */
+        SCI_FAILURE_INVALID_PHY,
+
+        /**
+         * This member indicates the calling method failed, because the SCI
+         * implementation does not contain the specified Port.
+         */
+        SCI_FAILURE_INVALID_PORT,
+
+        /**
+         * This member indicates the calling method was partly successful
+         * The port was reset but not all phys in port are operational
+         */
+        SCI_FAILURE_RESET_PORT_PARTIAL_SUCCESS,
+
+        /**
+         * This member indicates that calling method failed
+         * The port reset did not complete because none of the phys are operational
+         */
+        SCI_FAILURE_RESET_PORT_FAILURE,
+
+        /**
+         * This member indicates the calling method failed, because the SCI
+         * implementation does not contain the specified remote device.
+         */
+        SCI_FAILURE_INVALID_REMOTE_DEVICE,
+
+        /**
+         * This member indicates the calling method failed, because the remote
+         * device is in a bad state and requires a reset.
+         */
+        SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED,
+
+        /**
+         * This member indicates the calling method failed, because the SCI
+         * implementation does not contain or support the specified IO tag.
+         */
+        SCI_FAILURE_INVALID_IO_TAG,
+
+        /**
+         * This member indicates that the operation failed and the user should
+         * check the response data associated with the IO.
+         */
+        SCI_FAILURE_IO_RESPONSE_VALID,
+
+        /**
+         * This member indicates that the operation failed, the failure is
+         * controller implementation specific, and the response data associated
+         * with the request is not valid.  You can query for the controller
+         * specific error information via sci_controller_get_request_status()
+         */
+        SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR,
+
+        /**
+         * This member indicated that the operation failed because the
+         * user requested this IO to be terminated.
+         */
+        SCI_FAILURE_IO_TERMINATED,
+
+        /**
+         * This member indicates that the operation failed and the associated
+         * request requires a SCSI abort task to be sent to the target.
+         */
+        SCI_FAILURE_IO_REQUIRES_SCSI_ABORT,
+
+        /**
+         * This member indicates that the operation failed because the supplied
+         * device could not be located.
+         */
+        SCI_FAILURE_DEVICE_NOT_FOUND,
+
+        /**
+         * This member indicates that the operation failed because the
+         * objects association is required and is not correctly set.
+         */
+        SCI_FAILURE_INVALID_ASSOCIATION,
+
+        /**
+         * This member indicates that the operation failed, because a timeout
+         * occurred.
+         */
+        SCI_FAILURE_TIMEOUT,
+
+        /**
+         * This member indicates that the operation failed, because the user
+         * specified a value that is either invalid or not supported.
+         */
+        SCI_FAILURE_INVALID_PARAMETER_VALUE,
+
+        /**
+         * This value indicates that the operation failed, because the number
+         * of messages (MSI-X) is not supported.
+         */
+        SCI_FAILURE_UNSUPPORTED_MESSAGE_COUNT,
+
+        /**
+         * This value indicates that the method failed due to a lack of
+         * available NCQ tags.
+         */
+        SCI_FAILURE_NO_NCQ_TAG_AVAILABLE,
+
+        /**
+         * This value indicates that a protocol violation has occurred on the
+         * link.
+         */
+        SCI_FAILURE_PROTOCOL_VIOLATION,
+
+        /**
+         * This value indicates a failure condition that retry may help to clear.
+         */
+        SCI_FAILURE_RETRY_REQUIRED,
+
+        /**
+         * This field indicates the retry limit was reached when a retry is attempted
+         */
+        SCI_FAILURE_RETRY_LIMIT_REACHED,
+
+        /**
+         * This member indicates the calling method was partly successful.
+         * Mostly, this status is used when a LUN_RESET issued to an expander attached
+         * STP device in READY NCQ substate needs to have RNC suspended/resumed
+         * before posting TC.
+         */
+        SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS,
+
+        /**
+         * This field indicates an illegal phy connection based on the routing attribute
+         * of both expander phy attached to each other.
+         */
+        SCI_FAILURE_ILLEGAL_ROUTING_ATTRIBUTE_CONFIGURATION,
+
+        /**
+         * This field indicates a CONFIG ROUTE INFO command has a response with function result
+         * INDEX DOES NOT EXIST, usually means exceeding max route index.
+         */
+        SCI_FAILURE_EXCEED_MAX_ROUTE_INDEX,
+
+        /**
+         * This value indicates that an unsupported PCI device ID has been
+         * specified.  This indicates that attempts to invoke
+         * sci_library_allocate_controller() will fail.
+         */
+        SCI_FAILURE_UNSUPPORTED_PCI_DEVICE_ID
+
+};
+
+/**
+ * enum sci_io_status - This enumeration depicts all of the possible IO
+ *    completion status values.  Each value in this enumeration maps directly
+ *    to a value in the enum sci_status enumeration.  Please refer to that
+ *    enumeration for detailed comments concerning what the status represents.
+ *
+ * Add the API to retrieve the SCU status from the core. Check to see that the
+ * following status are properly handled: - SCI_IO_FAILURE_UNSUPPORTED_PROTOCOL
+ * - SCI_IO_FAILURE_INVALID_IO_TAG
+ */
+enum sci_io_status {
+        SCI_IO_SUCCESS                         = SCI_SUCCESS,
+        SCI_IO_FAILURE                         = SCI_FAILURE,
+        SCI_IO_SUCCESS_COMPLETE_BEFORE_START   = SCI_SUCCESS_IO_COMPLETE_BEFORE_START,
+        SCI_IO_SUCCESS_IO_DONE_EARLY           = SCI_SUCCESS_IO_DONE_EARLY,
+        SCI_IO_FAILURE_INVALID_STATE           = SCI_FAILURE_INVALID_STATE,
+        SCI_IO_FAILURE_INSUFFICIENT_RESOURCES  = SCI_FAILURE_INSUFFICIENT_RESOURCES,
+        SCI_IO_FAILURE_UNSUPPORTED_PROTOCOL    = SCI_FAILURE_UNSUPPORTED_PROTOCOL,
+        SCI_IO_FAILURE_RESPONSE_VALID          = SCI_FAILURE_IO_RESPONSE_VALID,
+        SCI_IO_FAILURE_CONTROLLER_SPECIFIC_ERR = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR,
+        SCI_IO_FAILURE_TERMINATED              = SCI_FAILURE_IO_TERMINATED,
+        SCI_IO_FAILURE_REQUIRES_SCSI_ABORT     = SCI_FAILURE_IO_REQUIRES_SCSI_ABORT,
+        SCI_IO_FAILURE_INVALID_PARAMETER_VALUE = SCI_FAILURE_INVALID_PARAMETER_VALUE,
+        SCI_IO_FAILURE_NO_NCQ_TAG_AVAILABLE    = SCI_FAILURE_NO_NCQ_TAG_AVAILABLE,
+        SCI_IO_FAILURE_PROTOCOL_VIOLATION      = SCI_FAILURE_PROTOCOL_VIOLATION,
+
+        SCI_IO_FAILURE_REMOTE_DEVICE_RESET_REQUIRED = SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED,
+
+        SCI_IO_FAILURE_RETRY_REQUIRED      = SCI_FAILURE_RETRY_REQUIRED,
+        SCI_IO_FAILURE_RETRY_LIMIT_REACHED = SCI_FAILURE_RETRY_LIMIT_REACHED,
+        SCI_IO_FAILURE_INVALID_REMOTE_DEVICE = SCI_FAILURE_INVALID_REMOTE_DEVICE
+};
+
+/**
+ * enum sci_task_status - This enumeration depicts all of the possible task
+ *    completion status values.  Each value in this enumeration maps directly
+ *    to a value in the enum sci_status enumeration.  Please refer to that
+ *    enumeration for detailed comments concerning what the status represents.
+ *
+ * Check to see that the following status are properly handled:
+ */
+enum sci_task_status {
+        SCI_TASK_SUCCESS                         = SCI_SUCCESS,
+        SCI_TASK_FAILURE                         = SCI_FAILURE,
+        SCI_TASK_FAILURE_INVALID_STATE           = SCI_FAILURE_INVALID_STATE,
+        SCI_TASK_FAILURE_INSUFFICIENT_RESOURCES  = SCI_FAILURE_INSUFFICIENT_RESOURCES,
+        SCI_TASK_FAILURE_UNSUPPORTED_PROTOCOL    = SCI_FAILURE_UNSUPPORTED_PROTOCOL,
+        SCI_TASK_FAILURE_INVALID_TAG             = SCI_FAILURE_INVALID_IO_TAG,
+        SCI_TASK_FAILURE_RESPONSE_VALID          = SCI_FAILURE_IO_RESPONSE_VALID,
+        SCI_TASK_FAILURE_CONTROLLER_SPECIFIC_ERR = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR,
+        SCI_TASK_FAILURE_TERMINATED              = SCI_FAILURE_IO_TERMINATED,
+        SCI_TASK_FAILURE_INVALID_PARAMETER_VALUE = SCI_FAILURE_INVALID_PARAMETER_VALUE,
+
+        SCI_TASK_FAILURE_REMOTE_DEVICE_RESET_REQUIRED = SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED,
+        SCI_TASK_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS = SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS
+
+};
+
+/**
+ * sci_swab32_cpy - convert between scsi and scu-hardware byte format
+ * @dest: receive the 4-byte endian swapped version of src
+ * @src: word aligned source buffer
+ *
+ * scu hardware handles SSP/SMP control, response, and unidentified
+ * frames in "big endian dword" order.  Regardless of host endian this
+ * is always a swab32()-per-dword conversion of the standard definition,
+ * i.e. single byte fields swapped and multi-byte fields in little-
+ * endian
+ */
+static inline void sci_swab32_cpy(void *_dest, void *_src, ssize_t word_cnt)
+{
+        u32 *dest = _dest, *src = _src;
+
+        while (--word_cnt >= 0)
+                dest[word_cnt] = swab32(src[word_cnt]);
+}
+
+extern unsigned char no_outbound_task_to;
+extern u16 ssp_max_occ_to;
+extern u16 stp_max_occ_to;
+extern u16 ssp_inactive_to;
+extern u16 stp_inactive_to;
+extern unsigned char phy_gen;
+extern unsigned char max_concurr_spinup;
+
+irqreturn_t isci_msix_isr(int vec, void *data);
+irqreturn_t isci_intx_isr(int vec, void *data);
+irqreturn_t isci_error_isr(int vec, void *data);
+
+/*
+ * Each timer is associated with a cancellation flag that is set when
+ * del_timer() is called and checked in the timer callback function. This
+ * is needed since del_timer_sync() cannot be called with sci_lock held.
+ * For deinit however, del_timer_sync() is used without holding the lock.
+ */
+struct sci_timer {
+        struct timer_list       timer;
+        bool                    cancel;
+};
+
+static inline
+void sci_init_timer(struct sci_timer *tmr, void (*fn)(unsigned long))
+{
+        tmr->timer.function = fn;
+        tmr->timer.data = (unsigned long) tmr;
+        tmr->cancel = 0;
+        init_timer(&tmr->timer);
+}
+
+static inline void sci_mod_timer(struct sci_timer *tmr, unsigned long msec)
+{
+        tmr->cancel = 0;
+        mod_timer(&tmr->timer, jiffies + msecs_to_jiffies(msec));
+}
+
+static inline void sci_del_timer(struct sci_timer *tmr)
+{
+        tmr->cancel = 1;
+        del_timer(&tmr->timer);
+}
+
+struct sci_base_state_machine {
+        const struct sci_base_state *state_table;
+        u32 initial_state_id;
+        u32 current_state_id;
+        u32 previous_state_id;
+};
+
+typedef void (*sci_state_transition_t)(struct sci_base_state_machine *sm);
+
+struct sci_base_state {
+        sci_state_transition_t enter_state;     /* Called on state entry */
+        sci_state_transition_t exit_state;      /* Called on state exit */
+};
+
+extern void sci_init_sm(struct sci_base_state_machine *sm,
+                        const struct sci_base_state *state_table,
+                        u32 initial_state);
+extern void sci_change_state(struct sci_base_state_machine *sm, u32 next_state);
+#endif  /* __ISCI_H__ */