path: root/drivers/scsi/megaraid/megaraid_sas_fusion.h

/*
 *  Linux MegaRAID driver for SAS based RAID controllers
 *
 *  Copyright (c) 2009-2013  LSI Corporation
 *  Copyright (c) 2013-2014  Avago Technologies
 *
 *  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.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *  FILE: megaraid_sas_fusion.h
 *
 *  Authors: Avago Technologies
 *           Manoj Jose
 *           Sumant Patro
 *           Kashyap Desai <kashyap.desai@avagotech.com>
 *           Sumit Saxena <sumit.saxena@avagotech.com>
 *
 *  Send feedback to: megaraidlinux.pdl@avagotech.com
 *
 *  Mail to: Avago Technologies, 350 West Trimble Road, Building 90,
 *  San Jose, California 95131
 */

#ifndef _MEGARAID_SAS_FUSION_H_
#define _MEGARAID_SAS_FUSION_H_

/* Fusion defines */
#define MEGASAS_CHAIN_FRAME_SZ_MIN 1024
#define MFI_FUSION_ENABLE_INTERRUPT_MASK (0x00000009)
#define MEGASAS_MAX_CHAIN_SHIFT			5
#define MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK	0x400000
#define MEGASAS_MAX_CHAIN_SIZE_MASK		0x3E0
#define MEGASAS_256K_IO				128
#define MEGASAS_1MB_IO				(MEGASAS_256K_IO * 4)
#define MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE 256
#define MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST   0xF0
#define MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST         0xF1
#define MEGASAS_LOAD_BALANCE_FLAG		    0x1
#define MEGASAS_DCMD_MBOX_PEND_FLAG		    0x1
#define HOST_DIAG_WRITE_ENABLE			    0x80
#define HOST_DIAG_RESET_ADAPTER			    0x4
#define MEGASAS_FUSION_MAX_RESET_TRIES		    3
#define MAX_MSIX_QUEUES_FUSION			    128
#define RDPQ_MAX_INDEX_IN_ONE_CHUNK		    16
#define RDPQ_MAX_CHUNK_COUNT (MAX_MSIX_QUEUES_FUSION / RDPQ_MAX_INDEX_IN_ONE_CHUNK)

/* Invader defines */
#define MPI2_TYPE_CUDA				    0x2
#define MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH   0x4000
#define	MR_RL_FLAGS_GRANT_DESTINATION_CPU0	    0x00
#define	MR_RL_FLAGS_GRANT_DESTINATION_CPU1	    0x10
#define	MR_RL_FLAGS_GRANT_DESTINATION_CUDA	    0x80
#define MR_RL_FLAGS_SEQ_NUM_ENABLE		    0x8
#define MR_RL_WRITE_THROUGH_MODE		    0x00
#define MR_RL_WRITE_BACK_MODE			    0x01

/* T10 PI defines */
#define MR_PROT_INFO_TYPE_CONTROLLER                0x8
#define MEGASAS_SCSI_VARIABLE_LENGTH_CMD            0x7f
#define MEGASAS_SCSI_SERVICE_ACTION_READ32          0x9
#define MEGASAS_SCSI_SERVICE_ACTION_WRITE32         0xB
#define MEGASAS_SCSI_ADDL_CDB_LEN                   0x18
#define MEGASAS_RD_WR_PROTECT_CHECK_ALL		    0x20
#define MEGASAS_RD_WR_PROTECT_CHECK_NONE	    0x60

#define MPI2_SUP_REPLY_POST_HOST_INDEX_OFFSET   (0x0000030C)
#define MPI2_REPLY_POST_HOST_INDEX_OFFSET	(0x0000006C)

/*
 * Raid context flags
 */

#define MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT   0x4
#define MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_MASK    0x30
enum MR_RAID_FLAGS_IO_SUB_TYPE {
	MR_RAID_FLAGS_IO_SUB_TYPE_NONE = 0,
	MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD = 1,
	MR_RAID_FLAGS_IO_SUB_TYPE_RMW_DATA     = 2,
	MR_RAID_FLAGS_IO_SUB_TYPE_RMW_P        = 3,
	MR_RAID_FLAGS_IO_SUB_TYPE_RMW_Q        = 4,
	MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS = 6,
	MR_RAID_FLAGS_IO_SUB_TYPE_LDIO_BW_LIMIT = 7
};

/*
 * Request descriptor types
 */
#define MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO           0x7
#define MEGASAS_REQ_DESCRIPT_FLAGS_MFA             0x1
#define MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK	   0x2
#define MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT      1

#define MEGASAS_FP_CMD_LEN	16
#define MEGASAS_FUSION_IN_RESET 0
#define THRESHOLD_REPLY_COUNT 50
#define RAID_1_PEER_CMDS 2
#define JBOD_MAPS_COUNT	2
#define MEGASAS_REDUCE_QD_COUNT 64
#define IOC_INIT_FRAME_SIZE 4096

/*
 * Raid Context structure which describes MegaRAID specific IO Parameters
 * This resides at offset 0x60 where the SGL normally starts in MPT IO Frames
 */

struct RAID_CONTEXT {
#if   defined(__BIG_ENDIAN_BITFIELD)
	u8 nseg:4;
	u8 type:4;
#else
	u8 type:4;
	u8 nseg:4;
#endif
	u8 resvd0;
	__le16 timeout_value;
	u8 reg_lock_flags;
	u8 resvd1;
	__le16