a9344e68ac
After discussion with andmike and dougg, it seems that the purpose of eh_device_reset_handler is to issue LU resets, and that eh_bus_reset_handler would be a more appropriate place for a phy reset. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
666 lines
17 KiB
C
666 lines
17 KiB
C
/*
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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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* This file is licensed under GPLv2.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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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/list.h>
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#include <asm/semaphore.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 <asm/scatterlist.h>
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struct block_device;
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enum sas_class {
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SAS,
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EXPANDER
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};
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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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enum sas_phy_type {
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PHY_TYPE_PHYSICAL,
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PHY_TYPE_VIRTUAL
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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 ha_event {
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HAE_RESET = 0U,
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HA_NUM_EVENTS = 1,
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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 = 1,
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PORTE_LINK_RESET_ERR = 2,
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PORTE_TIMER_EVENT = 3,
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PORTE_HARD_RESET = 4,
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PORT_NUM_EVENTS = 5,
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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 = 1,
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PHYE_OOB_ERROR = 2,
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PHYE_SPINUP_HOLD = 3, /* hot plug SATA, no COMWAKE sent */
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PHY_NUM_EVENTS = 4,
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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 = 1,
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DISCE_PORT_GONE = 2,
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DISC_NUM_EVENTS = 3,
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};
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/* ---------- Expander Devices ---------- */
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#define ETASK 0xFA
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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_dev_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_proto attached_tproto;
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enum sas_proto 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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u8 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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u16 ex_change_count;
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u16 max_route_indexes;
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u8 num_phys;
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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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};
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/* ---------- SATA device ---------- */
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enum ata_command_set {
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ATA_COMMAND_SET = 0,
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ATAPI_COMMAND_SET = 1,
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};
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struct sata_device {
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enum ata_command_set command_set;
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struct smp_resp rps_resp; /* report_phy_sata_resp */
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__le16 *identify_device;
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__le16 *identify_packet_device;
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u8 port_no; /* port number, if this is a PM (Port) */
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struct list_head children; /* PM Ports if this is a PM */
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};
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/* ---------- Domain device ---------- */
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struct domain_device {
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enum sas_dev_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 list_head dev_list_node;
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enum sas_proto iproto;
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enum sas_proto 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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};
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void *lldd_dev;
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};
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struct sas_discovery_event {
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struct work_struct work;
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struct asd_sas_port *port;
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};
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struct sas_discovery {
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spinlock_t disc_event_lock;
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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[8];
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u8 eeds_a[8];
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u8 eeds_b[8];
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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 completion port_gone_completion;
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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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enum sas_linkrate linkrate;
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struct sas_phy *phy;
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struct work_struct work;
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/* public: */
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int id;
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enum sas_class class;
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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_proto iproto;
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enum sas_proto 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 work_struct work;
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struct asd_sas_phy *phy;
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};
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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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/* protected by ha->event_lock */
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struct asd_sas_event port_events[PORT_NUM_EVENTS];
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struct asd_sas_event phy_events[PHY_NUM_EVENTS];
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unsigned long port_events_pending;
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unsigned long phy_events_pending;
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int error;
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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_class class;
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enum sas_proto iproto;
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enum sas_proto tproto;
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enum sas_phy_type type;
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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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struct scsi_core {
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struct Scsi_Host *shost;
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spinlock_t task_queue_lock;
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struct list_head task_queue;
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int task_queue_size;
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struct semaphore queue_thread_sema;
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int queue_thread_kill;
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};
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struct sas_ha_event {
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struct work_struct work;
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struct sas_ha_struct *ha;
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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_UNREGISTERED
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};
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struct sas_ha_struct {
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/* private: */
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spinlock_t event_lock;
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struct sas_ha_event ha_events[HA_NUM_EVENTS];
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unsigned long pending;
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enum sas_ha_state state;
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spinlock_t state_lock;
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struct scsi_core core;
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/* public: */
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char *sas_ha_name;
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struct pci_dev *pcidev; /* should be set */
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struct module *lldd_module; /* should be set */
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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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/* The class calls this to send a task for execution. */
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int lldd_max_execute_num;
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int lldd_queue_size;
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/* LLDD calls these to notify the class of an event. */
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void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
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void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
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void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
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void *lldd_ha; /* not touched by sas class code */
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struct list_head eh_done_q;
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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 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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void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
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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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/* ---------- 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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SAM_GOOD = 0,
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SAM_CHECK_COND = 2,
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SAM_COND_MET = 4,
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SAM_BUSY = 8,
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SAM_INTERMEDIATE = 0x10,
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SAM_IM_COND_MET = 0x12,
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SAM_RESV_CONFLICT= 0x14,
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SAM_TASK_SET_FULL= 0x28,
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SAM_ACA_ACTIVE = 0x30,
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SAM_TASK_ABORTED = 0x40,
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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_SG_ERR,
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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[24]; /* dev to host or data-in */
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u32 sstatus;
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u32 serror;
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u32 scontrol;
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u32 sactive;
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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 retry_count; /* hardware retry, should be > 0 */
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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 set_affil_pol:1;
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u8 stp_affil_pol:1;
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u8 device_control_reg_update:1;
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};
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struct sas_smp_task {
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struct scatterlist smp_req;
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struct scatterlist smp_resp;
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};
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enum task_attribute {
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TASK_ATTR_SIMPLE = 0,
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TASK_ATTR_HOQ = 1,
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TASK_ATTR_ORDERED= 2,
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TASK_ATTR_ACA = 4,
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};
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struct sas_ssp_task {
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u8 retry_count; /* hardware retry, should be > 0 */
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u8 LUN[8];
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u8 enable_first_burst:1;
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enum task_attribute task_attr;
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u8 task_prio;
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u8 cdb[16];
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};
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struct sas_task {
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struct domain_device *dev;
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struct list_head list;
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spinlock_t task_state_lock;
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unsigned task_state_flags;
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enum sas_proto task_proto;
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/* Used by the discovery code. */
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struct timer_list timer;
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struct completion completion;
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union {
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struct sas_ata_task ata_task;
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struct sas_smp_task smp_task;
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struct sas_ssp_task ssp_task;
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};
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struct scatterlist *scatter;
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int num_scatter;
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u32 total_xfer_len;
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u8 data_dir:2; /* Use PCI_DMA_... */
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struct task_status_struct task_status;
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void (*task_done)(struct sas_task *);
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|
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void *lldd_task; /* for use by LLDDs */
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void *uldd_task;
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|
|
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struct work_struct abort_work;
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};
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|
|
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|
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#define SAS_TASK_STATE_PENDING 1
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#define SAS_TASK_STATE_DONE 2
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#define SAS_TASK_STATE_ABORTED 4
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#define SAS_TASK_NEED_DEV_RESET 8
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#define SAS_TASK_AT_INITIATOR 16
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static inline struct sas_task *sas_alloc_task(gfp_t flags)
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|
{
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extern struct kmem_cache *sas_task_cache;
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struct sas_task *task = kmem_cache_alloc(sas_task_cache, flags);
|
|
|
|
if (task) {
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memset(task, 0, sizeof(*task));
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INIT_LIST_HEAD(&task->list);
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spin_lock_init(&task->task_state_lock);
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task->task_state_flags = SAS_TASK_STATE_PENDING;
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init_timer(&task->timer);
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init_completion(&task->completion);
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|
}
|
|
|
|
return task;
|
|
}
|
|
|
|
static inline void sas_free_task(struct sas_task *task)
|
|
{
|
|
if (task) {
|
|
extern struct kmem_cache *sas_task_cache;
|
|
BUG_ON(!list_empty(&task->list));
|
|
kmem_cache_free(sas_task_cache, task);
|
|
}
|
|
}
|
|
|
|
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 *, int num,
|
|
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_aca)(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_lu_reset)(struct domain_device *, u8 *lun);
|
|
int (*lldd_query_task)(struct sas_task *);
|
|
|
|
/* 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 *);
|
|
};
|
|
|
|
extern int sas_register_ha(struct sas_ha_struct *);
|
|
extern int sas_unregister_ha(struct sas_ha_struct *);
|
|
|
|
int sas_set_phy_speed(struct sas_phy *phy,
|
|
struct sas_phy_linkrates *rates);
|
|
int sas_phy_enable(struct sas_phy *phy, int enabled);
|
|
int sas_phy_reset(struct sas_phy *phy, int hard_reset);
|
|
extern int sas_queuecommand(struct scsi_cmnd *,
|
|
void (*scsi_done)(struct scsi_cmnd *));
|
|
extern int sas_target_alloc(struct scsi_target *);
|
|
extern int sas_slave_alloc(struct scsi_device *);
|
|
extern int sas_slave_configure(struct scsi_device *);
|
|
extern void sas_slave_destroy(struct scsi_device *);
|
|
extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
|
|
extern int sas_change_queue_type(struct scsi_device *, int qt);
|
|
extern int sas_bios_param(struct scsi_device *,
|
|
struct block_device *,
|
|
sector_t capacity, int *hsc);
|
|
extern struct scsi_transport_template *
|
|
sas_domain_attach_transport(struct sas_domain_function_template *);
|
|
extern void sas_domain_release_transport(struct scsi_transport_template *);
|
|
|
|
int sas_discover_root_expander(struct domain_device *);
|
|
|
|
void sas_init_ex_attr(void);
|
|
|
|
int sas_ex_revalidate_domain(struct domain_device *);
|
|
|
|
void sas_unregister_domain_devices(struct asd_sas_port *port);
|
|
void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
|
|
int sas_discover_event(struct asd_sas_port *, enum discover_event ev);
|
|
|
|
int sas_discover_sata(struct domain_device *);
|
|
int sas_discover_end_dev(struct domain_device *);
|
|
|
|
void sas_unregister_dev(struct domain_device *);
|
|
|
|
void sas_init_dev(struct domain_device *);
|
|
|
|
void sas_task_abort(struct sas_task *);
|
|
int __sas_task_abort(struct sas_task *);
|
|
int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
|
|
int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
|
|
|
|
#endif /* _SASLIB_H_ */
|