path: root/include/scsi/libsas.h

/*
 * SAS host prototypes and structures header file
 *
 * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
 *
 * This file is licensed under GPLv2.
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 *
 */

#ifndef _LIBSAS_H_
#define _LIBSAS_H_


#include <linux/timer.h>
#include <linux/pci.h>
#include <scsi/sas.h>
#include <linux/libata.h>
#include <linux/list.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_transport_sas.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>

struct block_device;

enum sas_class {
	SAS,
	EXPANDER
};

enum sas_phy_role {
	PHY_ROLE_NONE = 0,
	PHY_ROLE_TARGET = 0x40,
	PHY_ROLE_INITIATOR = 0x80,
};

enum sas_phy_type {
        PHY_TYPE_PHYSICAL,
        PHY_TYPE_VIRTUAL
};

/* The events are mnemonically described in sas_dump.c
 * so when updating/adding events here, please also
 * update the other file too.
 */
enum port_event {
	PORTE_BYTES_DMAED     = 0U,
	PORTE_BROADCAST_RCVD,
	PORTE_LINK_RESET_ERR,
	PORTE_TIMER_EVENT,
	PORTE_HARD_RESET,
	PORT_NUM_EVENTS,
};

enum phy_event {
	PHYE_LOSS_OF_SIGNAL   = 0U,
	PHYE_OOB_DONE,
	PHYE_OOB_ERROR,
	PHYE_SPINUP_HOLD,             /* hot plug SATA, no COMWAKE sent */
	PHYE_RESUME_TIMEOUT,
	PHY_NUM_EVENTS,
};

enum discover_event {
	DISCE_DISCOVER_DOMAIN   = 0U,
	DISCE_REVALIDATE_DOMAIN,
	DISCE_PROBE,
	DISCE_SUSPEND,
	DISCE_RESUME,
	DISCE_DESTRUCT,
	DISC_NUM_EVENTS,
};

/* ---------- Expander Devices ---------- */

#define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
#define to_dev_attr(_attr)  container_of(_attr, struct domain_dev_attribute,\
                                         attr)

enum routing_attribute {
	DIRECT_ROUTING,
	SUBTRACTIVE_ROUTING,
	TABLE_ROUTING,
};

enum ex_phy_state {
	PHY_EMPTY,
	PHY_VACANT,
	PHY_NOT_PRESENT,
	PHY_DEVICE_DISCOVERED
};

struct ex_phy {
	int    phy_id;

	enum ex_phy_state phy_state;

	enum sas_device_type attached_dev_type;
	enum sas_linkrate linkrate;

	u8   attached_sata_host:1;
	u8   attached_sata_dev:1;
	u8   attached_sata_ps:1;

	enum sas_protocol attached_tproto;
	enum sas_protocol attached_iproto;

	u8   attached_sas_addr[SAS_ADDR_SIZE];
	u8   attached_phy_id;

	int phy_change_count;
	enum routing_attribute routing_attr;
	u8   virtual:1;

	int  last_da_index;

	struct sas_phy *phy;
	struct sas_port *port;
};

struct expander_device {
	struct list_head children;

	int    ex_change_count;
	u16    max_route_indexes;
	u8     num_phys;

	u8     t2t_supp:1;
	u8     configuring:1;
	u8     conf_route_table:1;

	u8     enclosure_logical_id[8];

	struct ex_phy *ex_phy;
	struct sas_port *parent_port;

	struct mutex cmd_mutex;
};

/* ---------- SATA device ---------- */
#define ATA_RESP_FIS_SIZE 24

struct sata_device {
	unsigned int class;
	u8     port_no;        /* port number, if this is a PM (Port) */

	struct ata_port *ap;
	struct ata_host ata_host;
	struct smp_resp rps_resp ____cacheline_aligned; /* report_phy_sata_resp */
	u8     fis[ATA_RESP_FIS_SIZE];
};

struct ssp_device {
	struct list_head eh_list_node; /* pending a user requested eh action */
	struct scsi_lun reset_lun;
};

enum {
	SAS_DEV_GONE,
	SAS_DEV_FOUND, /* device notified to lldd */
	SAS_DEV_DESTROY,
	SAS_DEV_EH_PENDING,
	SAS_DEV_LU_RESET,
	SAS_DEV_RESET,
};

struct domain_device {
	spinlock_t done_lock;
	enum sas_device_type dev_type;

        enum sas_linkrate linkrate;
        enum sas_linkrate min_linkrate;
        enum sas_linkrate max_linkrate;

        int  pathways;

        struct domain_device *parent;
        struct list_head siblings; /* devices on the same level */
        struct asd_sas_port *port;        /* shortcut to root of the tree */
	struct sas_phy *phy;

        struct list_head dev_list_node;
	struct list_head disco_list_node; /* awaiting probe or destruct */

        enum sas_protocol    iproto;
        enum sas_protocol    tproto;

        struct sas_rphy *rphy;

        u8  sas_addr[SAS_ADDR_SIZE];
        u8  hashed_sas_addr[HASHED_SAS_ADDR_SIZE];

        u8  frame_rcvd[32];

        union {
                struct expander_device ex_dev;
                struct sata_device     sata_dev; /* STP & directly attached */
		struct ssp_device      ssp_dev;
        };

        void *lldd_dev;
	unsigned long state;
	struct kref kref;
};

struct sas_work {
	struct list_head drain_node;
	struct work_struct work;
};

static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *))
{
	INIT_WORK(&sw->work, fn);
	INIT_LIST_HEAD(&sw->drain_node);
}

struct sas_discovery_event {
	struct sas_work work;
	struct asd_sas_port *port;
};

static inline struct sas_discovery_event *to_sas_discovery_event(struct work_struct *work)
{
	struct sas_discovery_event *ev = container_of(work, typeof(*ev), work.work);

	return ev;
}

struct sas_discovery {
	struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
	unsigned long    pending;
	u8     fanout_sas_addr[8];
	u8     eeds_a[8];
	u8     eeds_b[8];
	int    max_level;
};

/* The port struct is Class:RW, driver:RO */
struct asd_sas_port {
/* private: */
	struct sas_discovery disc;
	struct domain_device *port_dev;
	spinlock_t dev_list_lock;
	struct list_head dev_list;
	struct list_head disco_list;
	struct list_head destroy_list;
	enum   sas_linkrate linkrate;

	struct sas_work work;
	int suspended;

/* public: */
	int id;

	enum sas_class   class;
	u8               sas_addr[SAS_ADDR_SIZE];
	u8               attached_sas_addr[SAS_ADDR_SIZE];
	enum sas_protocol   iproto;
	enum sas_protocol   tproto;

	enum sas_oob_mode oob_mode;

	spinlock_t       phy_list_lock;
	struct list_head phy_list;
	int              num_phys;
	u32              phy_mask;

	struct sas_ha_struct *ha;

	struct sas_port	*port;

	void *lldd_port;	  /* not touched by the sas class code */
};

struct asd_sas_event {
	struct sas_work work;
	struct asd_sas_phy *phy;
};

static inline struct asd_sas_event *to_asd_sas_event(struct work_struct *work)
{
	struct asd_sas_event *ev = container_of(work, typeof(*ev),