[PATCH][SCSI] mpt3sas: Common API headers to set Diagnostic trigger for MPT based controllers

[PATCH][SCSI] mpt3sas: Common API headers to set Diagnostic trigger for MPT based controllers

[sreekanth.reddy]

This patch provides common API headers to set Diagnostic trigger for MPT
(Message Passing Technology) based controllers

Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@lsi.com>
Reviewed-by: Nagalakshmi Nandigama <Nagalakshmi.Nandigama@lsi.com>
---

diff --git a/drivers/scsi/mpt3sas/mpt3sas_trigger_diag.h b/drivers/scsi/mpt3sas/mpt3sas_trigger_diag.h
new file mode 100644
index 0000000..a10c309
--- /dev/null
+++ b/drivers/scsi/mpt3sas/mpt3sas_trigger_diag.h
@@ -0,0 +1,193 @@
+/*
+ * This is the Fusion MPT base driver providing common API layer interface
+ * to set Diagnostic triggers for MPT (Message Passing Technology) based
+ * controllers
+ *
+ * This code is based on drivers/scsi/mpt3sas/mpt3sas_base.h
+ * Copyright (C) 2012  LSI Corporation
+ *  (mailto:DL-MPTFusionLinux@lsi.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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.
+ *
+ * NO WARRANTY
+ * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
+ * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
+ * solely responsible for determining the appropriateness of using and
+ * distributing the Program and assumes all risks associated with its
+ * exercise of rights under this Agreement, including but not limited to
+ * the risks and costs of program errors, damage to or loss of data,
+ * programs or equipment, and unavailability or interruption of operations.
+
+ * DISCLAIMER OF LIABILITY
+ * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), 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 OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
+ * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
+
+ * 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 Street, Fifth Floor, Boston, MA  02110-1301,
+ * USA.
+ */
+  /* Diagnostic Trigger Configuration Data Structures */
+
+#ifndef MPT3SAS_TRIGGER_DIAG_H_INCLUDED
+#define MPT3SAS_TRIGGER_DIAG_H_INCLUDED
+
+/* limitation on number of entries */
+#define NUM_VALID_ENTRIES               (20)
+
+/* trigger types */
+#define MPT3SAS_TRIGGER_MASTER          (1)
+#define MPT3SAS_TRIGGER_EVENT           (2)
+#define MPT3SAS_TRIGGER_SCSI            (3)
+#define MPT3SAS_TRIGGER_MPI             (4)
+
+/* trigger names */
+#define MASTER_TRIGGER_FILE_NAME        "diag_trigger_master"
+#define EVENT_TRIGGERS_FILE_NAME        "diag_trigger_event"
+#define SCSI_TRIGGERS_FILE_NAME         "diag_trigger_scsi"
+#define MPI_TRIGGER_FILE_NAME           "diag_trigger_mpi"
+
+/* master trigger bitmask */
+#define MASTER_TRIGGER_FW_FAULT         (0x00000001)
+#define MASTER_TRIGGER_ADAPTER_RESET    (0x00000002)
+#define MASTER_TRIGGER_TASK_MANAGMENT   (0x00000004)
+#define MASTER_TRIGGER_DEVICE_REMOVAL   (0x00000008)
+
+/* fake firmware event for tigger */
+#define MPI3_EVENT_DIAGNOSTIC_TRIGGER_FIRED	(0x6E)
+
+/**
+ * MasterTrigger is a single U32 passed to/from sysfs.
+ *
+ * Bit Flags (enables) include:
+ * 1. FW Faults
+ * 2. Adapter Reset issued by driver
+ * 3. TMs
+ * 4. Device Remove Event sent by FW
+ */
+
+struct SL_WH_MASTER_TRIGGER_T {
+	uint32_t MasterData;
+};
+
+/**
+ * struct SL_WH_EVENT_TRIGGER_T -  Definition of an event trigger element
+ * @EventValue: Event Code to trigger on
+ * @LogEntryQualifier: Type of FW event that logged (Log Entry Added Event only)
+ *
+ * Defines an event that should induce a DIAG_TRIGGER driver event if observed.
+ */
+struct SL_WH_EVENT_TRIGGER_T {
+	uint16_t EventValue;
+	uint16_t LogEntryQualifier;
+};
+
+/**
+ * struct SL_WH_EVENT_TRIGGERS_T -  Structure passed to/from sysfs containing a
+ *    list of Event Triggers to be monitored for.
+ * @ValidEntries: Number of _SL_WH_EVENT_TRIGGER_T structures contained in this
+ *    structure.
+ * @EventTriggerEntry: List of Event trigger elements.
+ *
+ * This binary structure is transferred via sysfs to get/set Event Triggers
+ * in the Linux Driver.
+ */
+
+struct SL_WH_EVENT_TRIGGERS_T {
+	uint32_t ValidEntries;
+	struct SL_WH_EVENT_TRIGGER_T EventTriggerEntry[NUM_VALID_ENTRIES];
+};
+
+/**
+ * struct SL_WH_SCSI_TRIGGER_T -  Definition of a SCSI trigger element
+ * @ASCQ: Additional Sense Code Qualifier.  Can be specific or 0xFF for
+ *     wildcard.
+ * @ASC: Additional Sense Code.  Can be specific or 0xFF for wildcard
+ * @SenseKey: SCSI Sense Key
+ *
+ * Defines a sense key (single or many variants) that should induce a
+ * DIAG_TRIGGER driver event if observed.
+ */
+struct SL_WH_SCSI_TRIGGER_T {
+	U8 ASCQ;
+	U8 ASC;
+	U8 SenseKey;
+	U8 Reserved;
+};
+
+/**
+ * struct SL_WH_SCSI_TRIGGERS_T -  Structure passed to/from sysfs containing a
+ *    list of SCSI sense codes that should trigger a DIAG_SERVICE event when
+ *    observed.
+ * @ValidEntries: Number of _SL_WH_SCSI_TRIGGER_T structures contained in this
+ *    structure.
+ * @SCSITriggerEntry: List of SCSI Sense Code trigger elements.
+ *
+ * This binary structure is transferred via sysfs to get/set SCSI Sense Code
+ * Triggers in the Linux Driver.
+ */
+struct SL_WH_SCSI_TRIGGERS_T {
+	uint32_t ValidEntries;
+	struct SL_WH_SCSI_TRIGGER_T SCSITriggerEntry[NUM_VALID_ENTRIES];
+};
+
+/**
+ * struct SL_WH_MPI_TRIGGER_T -  Definition of an MPI trigger element
+ * @IOCStatus: MPI IOCStatus
+ * @IocLogInfo: MPI IocLogInfo.  Can be specific or 0xFFFFFFFF for wildcard
+ *
+ * Defines a MPI IOCStatus/IocLogInfo pair that should induce a DIAG_TRIGGER
+ * driver event if observed.
+ */
+struct SL_WH_MPI_TRIGGER_T {
+	uint16_t IOCStatus;
+	uint16_t Reserved;
+	uint32_t IocLogInfo;
+};
+
+/**
+ * struct SL_WH_MPI_TRIGGERS_T -  Structure passed to/from sysfs containing a
+ *    list of MPI IOCStatus/IocLogInfo pairs that should trigger a DIAG_SERVICE
+ *    event when observed.
+ * @ValidEntries: Number of _SL_WH_MPI_TRIGGER_T structures contained in this
+ *    structure.
+ * @MPITriggerEntry: List of MPI IOCStatus/IocLogInfo trigger elements.
+ *
+ * This binary structure is transferred via sysfs to get/set MPI Error Triggers
+ * in the Linux Driver.
+ */
+struct SL_WH_MPI_TRIGGERS_T {
+	uint32_t ValidEntries;
+	struct SL_WH_MPI_TRIGGER_T MPITriggerEntry[NUM_VALID_ENTRIES];
+};
+
+/**
+ * struct SL_WH_TRIGGERS_EVENT_DATA_T -  event data for trigger
+ * @trigger_type: trigger type (see MPT3SAS_TRIGGER_XXXX)
+ * @u: trigger condition that caused trigger to be sent
+ */
+struct SL_WH_TRIGGERS_EVENT_DATA_T {
+	uint32_t trigger_type;
+	union {
+		struct SL_WH_MASTER_TRIGGER_T master;
+		struct SL_WH_EVENT_TRIGGER_T event;
+		struct SL_WH_SCSI_TRIGGER_T scsi;
+		struct SL_WH_MPI_TRIGGER_T mpi;
+	} u;
+};
+#endif /* MPT3SAS_TRIGGER_DIAG_H_INCLUDED */