730 lines
18 KiB
C
730 lines
18 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* SAS host prototypes and structures header file
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*
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* Copyright (C) 2005 Adaptec, Inc. All rights reserved.
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* Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
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*/
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#ifndef _LIBSAS_H_
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#define _LIBSAS_H_
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#include <linux/timer.h>
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#include <linux/pci.h>
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#include <scsi/sas.h>
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#include <linux/libata.h>
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#include <linux/list.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_transport_sas.h>
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#include <linux/scatterlist.h>
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#include <linux/slab.h>
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struct block_device;
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enum sas_phy_role {
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PHY_ROLE_NONE = 0,
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PHY_ROLE_TARGET = 0x40,
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PHY_ROLE_INITIATOR = 0x80,
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};
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/* The events are mnemonically described in sas_dump.c
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* so when updating/adding events here, please also
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* update the other file too.
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*/
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enum port_event {
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PORTE_BYTES_DMAED = 0U,
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PORTE_BROADCAST_RCVD,
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PORTE_LINK_RESET_ERR,
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PORTE_TIMER_EVENT,
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PORTE_HARD_RESET,
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PORT_NUM_EVENTS,
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};
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enum phy_event {
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PHYE_LOSS_OF_SIGNAL = 0U,
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PHYE_OOB_DONE,
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PHYE_OOB_ERROR,
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PHYE_SPINUP_HOLD, /* hot plug SATA, no COMWAKE sent */
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PHYE_RESUME_TIMEOUT,
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PHYE_SHUTDOWN,
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PHY_NUM_EVENTS,
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};
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enum discover_event {
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DISCE_DISCOVER_DOMAIN = 0U,
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DISCE_REVALIDATE_DOMAIN,
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DISCE_SUSPEND,
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DISCE_RESUME,
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DISC_NUM_EVENTS,
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};
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/* ---------- Expander Devices ---------- */
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#define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
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#define to_dev_attr(_attr) container_of(_attr, struct domain_dev_attribute,\
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attr)
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enum routing_attribute {
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DIRECT_ROUTING,
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SUBTRACTIVE_ROUTING,
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TABLE_ROUTING,
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};
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enum ex_phy_state {
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PHY_EMPTY,
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PHY_VACANT,
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PHY_NOT_PRESENT,
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PHY_DEVICE_DISCOVERED
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};
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struct ex_phy {
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int phy_id;
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enum ex_phy_state phy_state;
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enum sas_device_type attached_dev_type;
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enum sas_linkrate linkrate;
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u8 attached_sata_host:1;
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u8 attached_sata_dev:1;
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u8 attached_sata_ps:1;
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enum sas_protocol attached_tproto;
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enum sas_protocol attached_iproto;
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u8 attached_sas_addr[SAS_ADDR_SIZE];
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u8 attached_phy_id;
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int phy_change_count;
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enum routing_attribute routing_attr;
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u8 virtual:1;
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int last_da_index;
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struct sas_phy *phy;
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struct sas_port *port;
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};
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struct expander_device {
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struct list_head children;
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int ex_change_count;
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u16 max_route_indexes;
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u8 num_phys;
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u8 t2t_supp:1;
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u8 configuring:1;
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u8 conf_route_table:1;
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u8 enclosure_logical_id[8];
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struct ex_phy *ex_phy;
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struct sas_port *parent_port;
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struct mutex cmd_mutex;
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};
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/* ---------- SATA device ---------- */
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#define ATA_RESP_FIS_SIZE 24
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struct sata_device {
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unsigned int class;
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u8 port_no; /* port number, if this is a PM (Port) */
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struct ata_port *ap;
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struct ata_host *ata_host;
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struct smp_rps_resp rps_resp ____cacheline_aligned; /* report_phy_sata_resp */
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u8 fis[ATA_RESP_FIS_SIZE];
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};
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struct ssp_device {
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struct list_head eh_list_node; /* pending a user requested eh action */
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struct scsi_lun reset_lun;
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};
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enum {
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SAS_DEV_GONE,
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SAS_DEV_FOUND, /* device notified to lldd */
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SAS_DEV_DESTROY,
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SAS_DEV_EH_PENDING,
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SAS_DEV_LU_RESET,
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SAS_DEV_RESET,
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};
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struct domain_device {
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spinlock_t done_lock;
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enum sas_device_type dev_type;
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enum sas_linkrate linkrate;
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enum sas_linkrate min_linkrate;
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enum sas_linkrate max_linkrate;
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int pathways;
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struct domain_device *parent;
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struct list_head siblings; /* devices on the same level */
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struct asd_sas_port *port; /* shortcut to root of the tree */
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struct sas_phy *phy;
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struct list_head dev_list_node;
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struct list_head disco_list_node; /* awaiting probe or destruct */
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enum sas_protocol iproto;
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enum sas_protocol tproto;
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struct sas_rphy *rphy;
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u8 sas_addr[SAS_ADDR_SIZE];
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u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
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u8 frame_rcvd[32];
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union {
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struct expander_device ex_dev;
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struct sata_device sata_dev; /* STP & directly attached */
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struct ssp_device ssp_dev;
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};
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void *lldd_dev;
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unsigned long state;
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struct kref kref;
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};
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struct sas_work {
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struct list_head drain_node;
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struct work_struct work;
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};
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static inline bool dev_is_expander(enum sas_device_type type)
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{
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return type == SAS_EDGE_EXPANDER_DEVICE ||
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type == SAS_FANOUT_EXPANDER_DEVICE;
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}
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static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *))
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{
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INIT_WORK(&sw->work, fn);
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INIT_LIST_HEAD(&sw->drain_node);
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}
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struct sas_discovery_event {
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struct sas_work work;
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struct asd_sas_port *port;
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};
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static inline struct sas_discovery_event *to_sas_discovery_event(struct work_struct *work)
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{
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struct sas_discovery_event *ev = container_of(work, typeof(*ev), work.work);
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return ev;
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}
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struct sas_discovery {
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struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
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unsigned long pending;
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u8 fanout_sas_addr[SAS_ADDR_SIZE];
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u8 eeds_a[SAS_ADDR_SIZE];
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u8 eeds_b[SAS_ADDR_SIZE];
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int max_level;
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};
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/* The port struct is Class:RW, driver:RO */
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struct asd_sas_port {
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/* private: */
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struct sas_discovery disc;
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struct domain_device *port_dev;
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spinlock_t dev_list_lock;
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struct list_head dev_list;
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struct list_head disco_list;
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struct list_head destroy_list;
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struct list_head sas_port_del_list;
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enum sas_linkrate linkrate;
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struct sas_work work;
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int suspended;
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/* public: */
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int id;
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u8 sas_addr[SAS_ADDR_SIZE];
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u8 attached_sas_addr[SAS_ADDR_SIZE];
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enum sas_protocol iproto;
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enum sas_protocol tproto;
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enum sas_oob_mode oob_mode;
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spinlock_t phy_list_lock;
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struct list_head phy_list;
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int num_phys;
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u32 phy_mask;
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struct sas_ha_struct *ha;
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struct sas_port *port;
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void *lldd_port; /* not touched by the sas class code */
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};
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struct asd_sas_event {
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struct sas_work work;
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struct asd_sas_phy *phy;
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int event;
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};
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static inline struct asd_sas_event *to_asd_sas_event(struct work_struct *work)
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{
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struct asd_sas_event *ev = container_of(work, typeof(*ev), work.work);
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return ev;
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}
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static inline void INIT_SAS_EVENT(struct asd_sas_event *ev,
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void (*fn)(struct work_struct *),
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struct asd_sas_phy *phy, int event)
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{
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INIT_SAS_WORK(&ev->work, fn);
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ev->phy = phy;
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ev->event = event;
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}
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#define SAS_PHY_SHUTDOWN_THRES 1024
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/* The phy pretty much is controlled by the LLDD.
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* The class only reads those fields.
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*/
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struct asd_sas_phy {
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/* private: */
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atomic_t event_nr;
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int in_shutdown;
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int error;
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int suspended;
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struct sas_phy *phy;
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/* public: */
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/* The following are class:RO, driver:R/W */
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int enabled; /* must be set */
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int id; /* must be set */
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enum sas_protocol iproto;
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enum sas_protocol tproto;
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enum sas_phy_role role;
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enum sas_oob_mode oob_mode;
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enum sas_linkrate linkrate;
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u8 *sas_addr; /* must be set */
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u8 attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
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spinlock_t frame_rcvd_lock;
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u8 *frame_rcvd; /* must be set */
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int frame_rcvd_size;
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spinlock_t sas_prim_lock;
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u32 sas_prim;
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struct list_head port_phy_el; /* driver:RO */
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struct asd_sas_port *port; /* Class:RW, driver: RO */
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struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
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void *lldd_phy; /* not touched by the sas_class_code */
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};
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enum sas_ha_state {
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SAS_HA_REGISTERED,
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SAS_HA_DRAINING,
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SAS_HA_ATA_EH_ACTIVE,
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SAS_HA_FROZEN,
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SAS_HA_RESUMING,
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};
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struct sas_ha_struct {
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/* private: */
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struct list_head defer_q; /* work queued while draining */
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struct mutex drain_mutex;
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unsigned long state;
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spinlock_t lock;
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int eh_active;
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wait_queue_head_t eh_wait_q;
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struct list_head eh_dev_q;
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struct mutex disco_mutex;
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struct Scsi_Host *shost;
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/* public: */
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char *sas_ha_name;
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struct device *dev; /* should be set */
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struct workqueue_struct *event_q;
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struct workqueue_struct *disco_q;
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u8 *sas_addr; /* must be set */
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u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
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spinlock_t phy_port_lock;
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struct asd_sas_phy **sas_phy; /* array of valid pointers, must be set */
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struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
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int num_phys; /* must be set, gt 0, static */
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int strict_wide_ports; /* both sas_addr and attached_sas_addr must match
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* their siblings when forming wide ports */
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void *lldd_ha; /* not touched by sas class code */
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struct list_head eh_done_q; /* complete via scsi_eh_flush_done_q */
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struct list_head eh_ata_q; /* scmds to promote from sas to ata eh */
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int event_thres;
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};
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#define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
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static inline struct domain_device *
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starget_to_domain_dev(struct scsi_target *starget) {
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return starget->hostdata;
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}
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static inline struct domain_device *
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sdev_to_domain_dev(struct scsi_device *sdev) {
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return starget_to_domain_dev(sdev->sdev_target);
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}
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static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev)
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{
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return &dev->sata_dev.ap->link.device[0];
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}
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static inline struct domain_device *
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cmd_to_domain_dev(struct scsi_cmnd *cmd)
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{
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return sdev_to_domain_dev(cmd->device);
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}
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/* Before calling a notify event, LLDD should use this function
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* when the link is severed (possibly from its tasklet).
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* The idea is that the Class only reads those, while the LLDD,
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* can R/W these (thus avoiding a race).
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*/
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static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
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{
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phy->oob_mode = OOB_NOT_CONNECTED;
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phy->linkrate = SAS_LINK_RATE_UNKNOWN;
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}
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static inline unsigned int to_sas_gpio_od(int device, int bit)
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{
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return 3 * device + bit;
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}
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static inline void sas_put_local_phy(struct sas_phy *phy)
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{
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put_device(&phy->dev);
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}
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#ifdef CONFIG_SCSI_SAS_HOST_SMP
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int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
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#else
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static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count)
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{
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return -1;
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}
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#endif
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/* ---------- Tasks ---------- */
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/*
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service_response | SAS_TASK_COMPLETE | SAS_TASK_UNDELIVERED |
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exec_status | | |
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---------------------+---------------------+-----------------------+
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SAM_... | X | |
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DEV_NO_RESPONSE | X | X |
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INTERRUPTED | X | |
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QUEUE_FULL | | X |
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DEVICE_UNKNOWN | | X |
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SG_ERR | | X |
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---------------------+---------------------+-----------------------+
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*/
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enum service_response {
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SAS_TASK_COMPLETE,
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SAS_TASK_UNDELIVERED = -1,
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};
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enum exec_status {
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/*
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* Values 0..0x7f are used to return the SAM_STAT_* codes. To avoid
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* 'case value not in enumerated type' compiler warnings every value
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* returned through the exec_status enum needs an alias with the SAS_
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* prefix here.
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*/
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SAS_SAM_STAT_GOOD = SAM_STAT_GOOD,
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SAS_SAM_STAT_BUSY = SAM_STAT_BUSY,
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SAS_SAM_STAT_TASK_ABORTED = SAM_STAT_TASK_ABORTED,
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SAS_SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
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SAS_DEV_NO_RESPONSE = 0x80,
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SAS_DATA_UNDERRUN,
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SAS_DATA_OVERRUN,
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SAS_INTERRUPTED,
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SAS_QUEUE_FULL,
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SAS_DEVICE_UNKNOWN,
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SAS_OPEN_REJECT,
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SAS_OPEN_TO,
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SAS_PROTO_RESPONSE,
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SAS_PHY_DOWN,
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SAS_NAK_R_ERR,
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SAS_PENDING,
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SAS_ABORTED_TASK,
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};
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/* When a task finishes with a response, the LLDD examines the
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* response:
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* - For an ATA task task_status_struct::stat is set to
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* SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
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* contents of struct ata_task_resp.
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* - For SSP tasks, if no data is present or status/TMF response
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* is valid, task_status_struct::stat is set. If data is present
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* (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
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* task_status_struct::buf_valid_size, and task_status_struct::stat is
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* set to SAM_CHECK_COND.
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*
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* "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
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* for ATA task.
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*
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* "frame_len" is the total frame length, which could be more or less
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* than actually copied.
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*
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* Tasks ending with response, always set the residual field.
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*/
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struct ata_task_resp {
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u16 frame_len;
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u8 ending_fis[ATA_RESP_FIS_SIZE]; /* dev to host or data-in */
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};
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#define SAS_STATUS_BUF_SIZE 96
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struct task_status_struct {
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enum service_response resp;
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enum exec_status stat;
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int buf_valid_size;
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u8 buf[SAS_STATUS_BUF_SIZE];
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u32 residual;
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enum sas_open_rej_reason open_rej_reason;
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};
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/* ATA and ATAPI task queuable to a SAS LLDD.
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*/
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struct sas_ata_task {
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struct host_to_dev_fis fis;
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u8 atapi_packet[16]; /* 0 if not ATAPI task */
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u8 dma_xfer:1; /* PIO:0 or DMA:1 */
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u8 use_ncq:1;
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u8 return_fis_on_success:1;
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u8 device_control_reg_update:1;
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bool force_phy;
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int force_phy_id;
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};
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/* LLDDs rely on these values */
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enum sas_internal_abort {
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SAS_INTERNAL_ABORT_SINGLE = 0,
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SAS_INTERNAL_ABORT_DEV = 1,
|
|
};
|
|
|
|
struct sas_internal_abort_task {
|
|
enum sas_internal_abort type;
|
|
unsigned int qid;
|
|
u16 tag;
|
|
};
|
|
|
|
struct sas_smp_task {
|
|
struct scatterlist smp_req;
|
|
struct scatterlist smp_resp;
|
|
};
|
|
|
|
enum task_attribute {
|
|
TASK_ATTR_SIMPLE = 0,
|
|
TASK_ATTR_HOQ = 1,
|
|
TASK_ATTR_ORDERED= 2,
|
|
TASK_ATTR_ACA = 4,
|
|
};
|
|
|
|
struct sas_ssp_task {
|
|
u8 LUN[8];
|
|
enum task_attribute task_attr;
|
|
struct scsi_cmnd *cmd;
|
|
};
|
|
|
|
struct sas_tmf_task {
|
|
u8 tmf;
|
|
u16 tag_of_task_to_be_managed;
|
|
};
|
|
|
|
struct sas_task {
|
|
struct domain_device *dev;
|
|
|
|
spinlock_t task_state_lock;
|
|
unsigned task_state_flags;
|
|
|
|
enum sas_protocol task_proto;
|
|
|
|
union {
|
|
struct sas_ata_task ata_task;
|
|
struct sas_smp_task smp_task;
|
|
struct sas_ssp_task ssp_task;
|
|
struct sas_internal_abort_task abort_task;
|
|
};
|
|
|
|
struct scatterlist *scatter;
|
|
int num_scatter;
|
|
u32 total_xfer_len;
|
|
u8 data_dir:2; /* Use PCI_DMA_... */
|
|
|
|
struct task_status_struct task_status;
|
|
void (*task_done)(struct sas_task *);
|
|
|
|
void *lldd_task; /* for use by LLDDs */
|
|
void *uldd_task;
|
|
struct sas_task_slow *slow_task;
|
|
struct sas_tmf_task *tmf;
|
|
};
|
|
|
|
struct sas_task_slow {
|
|
/* standard/extra infrastructure for slow path commands (SMP and
|
|
* internal lldd commands
|
|
*/
|
|
struct timer_list timer;
|
|
struct completion completion;
|
|
struct sas_task *task;
|
|
};
|
|
|
|
#define SAS_TASK_STATE_PENDING 1
|
|
#define SAS_TASK_STATE_DONE 2
|
|
#define SAS_TASK_STATE_ABORTED 4
|
|
#define SAS_TASK_NEED_DEV_RESET 8
|
|
|
|
static inline bool sas_is_internal_abort(struct sas_task *task)
|
|
{
|
|
return task->task_proto == SAS_PROTOCOL_INTERNAL_ABORT;
|
|
}
|
|
|
|
static inline struct request *sas_task_find_rq(struct sas_task *task)
|
|
{
|
|
struct scsi_cmnd *scmd;
|
|
|
|
if (task->task_proto & SAS_PROTOCOL_STP_ALL) {
|
|
struct ata_queued_cmd *qc = task->uldd_task;
|
|
|
|
scmd = qc ? qc->scsicmd : NULL;
|
|
} else {
|
|
scmd = task->uldd_task;
|
|
}
|
|
|
|
if (!scmd)
|
|
return NULL;
|
|
|
|
return scsi_cmd_to_rq(scmd);
|
|
}
|
|
|
|
struct sas_domain_function_template {
|
|
/* The class calls these to notify the LLDD of an event. */
|
|
void (*lldd_port_formed)(struct asd_sas_phy *);
|
|
void (*lldd_port_deformed)(struct asd_sas_phy *);
|
|
|
|
/* The class calls these when a device is found or gone. */
|
|
int (*lldd_dev_found)(struct domain_device *);
|
|
void (*lldd_dev_gone)(struct domain_device *);
|
|
|
|
int (*lldd_execute_task)(struct sas_task *, gfp_t gfp_flags);
|
|
|
|
/* Task Management Functions. Must be called from process context. */
|
|
int (*lldd_abort_task)(struct sas_task *);
|
|
int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
|
|
int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
|
|
int (*lldd_I_T_nexus_reset)(struct domain_device *);
|
|
int (*lldd_ata_check_ready)(struct domain_device *);
|
|
void (*lldd_ata_set_dmamode)(struct domain_device *);
|
|
int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
|
|
int (*lldd_query_task)(struct sas_task *);
|
|
|
|
/* Special TMF callbacks */
|
|
void (*lldd_tmf_exec_complete)(struct domain_device *dev);
|
|
void (*lldd_tmf_aborted)(struct sas_task *task);
|
|
bool (*lldd_abort_timeout)(struct sas_task *task, void *data);
|
|
|
|
/* Port and Adapter management */
|
|
int (*lldd_clear_nexus_port)(struct asd_sas_port *);
|
|
int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
|
|
|
|
/* Phy management */
|
|
int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
|
|
|
|
/* GPIO support */
|
|
int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type,
|
|
u8 reg_index, u8 reg_count, u8 *write_data);
|
|
};
|
|
|
|
extern int sas_register_ha(struct sas_ha_struct *);
|
|
extern int sas_unregister_ha(struct sas_ha_struct *);
|
|
extern void sas_prep_resume_ha(struct sas_ha_struct *sas_ha);
|
|
extern void sas_resume_ha(struct sas_ha_struct *sas_ha);
|
|
extern void sas_resume_ha_no_sync(struct sas_ha_struct *sas_ha);
|
|
extern void sas_suspend_ha(struct sas_ha_struct *sas_ha);
|
|
|
|
int sas_phy_reset(struct sas_phy *phy, int hard_reset);
|
|
int sas_phy_enable(struct sas_phy *phy, int enable);
|
|
extern int sas_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
|
|
extern int sas_target_alloc(struct scsi_target *);
|
|
extern int sas_slave_configure(struct scsi_device *);
|
|
extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
|
|
extern int sas_bios_param(struct scsi_device *, struct block_device *,
|
|
sector_t capacity, int *hsc);
|
|
int sas_execute_internal_abort_single(struct domain_device *device,
|
|
u16 tag, unsigned int qid,
|
|
void *data);
|
|
int sas_execute_internal_abort_dev(struct domain_device *device,
|
|
unsigned int qid, void *data);
|
|
extern struct scsi_transport_template *
|
|
sas_domain_attach_transport(struct sas_domain_function_template *);
|
|
extern struct device_attribute dev_attr_phy_event_threshold;
|
|
|
|
void sas_task_abort(struct sas_task *);
|
|
int sas_eh_abort_handler(struct scsi_cmnd *cmd);
|
|
int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
|
|
int sas_eh_target_reset_handler(struct scsi_cmnd *cmd);
|
|
|
|
extern void sas_target_destroy(struct scsi_target *);
|
|
extern int sas_slave_alloc(struct scsi_device *);
|
|
extern int sas_ioctl(struct scsi_device *sdev, unsigned int cmd,
|
|
void __user *arg);
|
|
extern int sas_drain_work(struct sas_ha_struct *ha);
|
|
|
|
extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
|
|
struct ssp_response_iu *iu);
|
|
struct sas_phy *sas_get_local_phy(struct domain_device *dev);
|
|
|
|
int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
|
|
|
|
int sas_abort_task_set(struct domain_device *dev, u8 *lun);
|
|
int sas_clear_task_set(struct domain_device *dev, u8 *lun);
|
|
int sas_lu_reset(struct domain_device *dev, u8 *lun);
|
|
int sas_query_task(struct sas_task *task, u16 tag);
|
|
int sas_abort_task(struct sas_task *task, u16 tag);
|
|
int sas_find_attached_phy_id(struct expander_device *ex_dev,
|
|
struct domain_device *dev);
|
|
|
|
void sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event,
|
|
gfp_t gfp_flags);
|
|
void sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event,
|
|
gfp_t gfp_flags);
|
|
|
|
#endif /* _SASLIB_H_ */
|