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linux-stable/drivers/scsi/ibmvscsi/ibmvfc.h
Brian King 5114975eb2 scsi: ibmvfc: Avoid move login if fast fail is enabled 
If fast fail is enabled and we encounter a WWPN moving from one port id to
another port id with I/O outstanding, if we use the move login MAD,
although it will work, it will leave any outstanding I/O still outstanding
to the old port id. Eventually, the SCSI command timers will fire and we
will abort these commands, however, this is generally much longer than the
fast fail timeout, which can lead to I/O operations being outstanding for a
long time. This patch changes the behavior to avoid the move login if fast
fail is enabled. Once terminate_rport_io cleans up the rport, then we force
the target back through the delete process, which re-drives the implicit
logout, then kicks us back into discovery where we will discover the WWPN
at the new location and do a PLOGI to it.

Link: https://lore.kernel.org/r/1620756740-7045-3-git-send-email-brking@linux.vnet.ibm.com
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-05-14 23:02:42 -04:00

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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* ibmvfc.h -- driver for IBM Power Virtual Fibre Channel Adapter
*
* Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
*
* Copyright (C) IBM Corporation, 2008
*/
#ifndef _IBMVFC_H
#define _IBMVFC_H
#include <linux/list.h>
#include <linux/types.h>
#include <scsi/viosrp.h>
#define IBMVFC_NAME "ibmvfc"
#define IBMVFC_DRIVER_VERSION "1.0.11"
#define IBMVFC_DRIVER_DATE "(April 12, 2013)"
#define IBMVFC_DEFAULT_TIMEOUT 60
#define IBMVFC_ADISC_CANCEL_TIMEOUT 45
#define IBMVFC_ADISC_TIMEOUT 15
#define IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT \
(IBMVFC_ADISC_TIMEOUT + IBMVFC_ADISC_CANCEL_TIMEOUT)
#define IBMVFC_INIT_TIMEOUT 120
#define IBMVFC_ABORT_TIMEOUT 8
#define IBMVFC_ABORT_WAIT_TIMEOUT 40
#define IBMVFC_MAX_REQUESTS_DEFAULT 100
#define IBMVFC_DEBUG 0
#define IBMVFC_MAX_TARGETS 1024
#define IBMVFC_MAX_LUN 0xffffffff
#define IBMVFC_MAX_SECTORS 0xffffu
#define IBMVFC_MAX_DISC_THREADS 4
#define IBMVFC_TGT_MEMPOOL_SZ 64
#define IBMVFC_MAX_CMDS_PER_LUN 64
#define IBMVFC_MAX_HOST_INIT_RETRIES 6
#define IBMVFC_MAX_TGT_INIT_RETRIES 3
#define IBMVFC_DEV_LOSS_TMO (5 * 60)
#define IBMVFC_DEFAULT_LOG_LEVEL 2
#define IBMVFC_MAX_CDB_LEN 16
#define IBMVFC_CLS3_ERROR 0
#define IBMVFC_MQ 1
#define IBMVFC_SCSI_CHANNELS 8
#define IBMVFC_MAX_SCSI_QUEUES 16
#define IBMVFC_SCSI_HW_QUEUES 8
#define IBMVFC_MIG_NO_SUB_TO_CRQ 0
#define IBMVFC_MIG_NO_N_TO_M 0
/*
* Ensure we have resources for ERP and initialization:
* 1 for ERP
* 1 for initialization
* 1 for NPIV Logout
* 2 for BSG passthru
* 2 for each discovery thread
*/
#define IBMVFC_NUM_INTERNAL_REQ (1 + 1 + 1 + 2 + (disc_threads * 2))
#define IBMVFC_MAD_SUCCESS 0x00
#define IBMVFC_MAD_NOT_SUPPORTED 0xF1
#define IBMVFC_MAD_VERSION_NOT_SUPP 0xF2
#define IBMVFC_MAD_FAILED 0xF7
#define IBMVFC_MAD_DRIVER_FAILED 0xEE
#define IBMVFC_MAD_CRQ_ERROR 0xEF
enum ibmvfc_crq_valid {
IBMVFC_CRQ_CMD_RSP = 0x80,
IBMVFC_CRQ_INIT_RSP = 0xC0,
IBMVFC_CRQ_XPORT_EVENT = 0xFF,
};
enum ibmvfc_crq_init_msg {
IBMVFC_CRQ_INIT = 0x01,
IBMVFC_CRQ_INIT_COMPLETE = 0x02,
};
enum ibmvfc_crq_xport_evts {
IBMVFC_PARTNER_FAILED = 0x01,
IBMVFC_PARTNER_DEREGISTER = 0x02,
IBMVFC_PARTITION_MIGRATED = 0x06,
};
enum ibmvfc_cmd_status_flags {
IBMVFC_FABRIC_MAPPED = 0x0001,
IBMVFC_VIOS_FAILURE = 0x0002,
IBMVFC_FC_FAILURE = 0x0004,
IBMVFC_FC_SCSI_ERROR = 0x0008,
IBMVFC_HW_EVENT_LOGGED = 0x0010,
IBMVFC_VIOS_LOGGED = 0x0020,
};
enum ibmvfc_fabric_mapped_errors {
IBMVFC_UNABLE_TO_ESTABLISH = 0x0001,
IBMVFC_XPORT_FAULT = 0x0002,
IBMVFC_CMD_TIMEOUT = 0x0003,
IBMVFC_ENETDOWN = 0x0004,
IBMVFC_HW_FAILURE = 0x0005,
IBMVFC_LINK_DOWN_ERR = 0x0006,
IBMVFC_LINK_DEAD_ERR = 0x0007,
IBMVFC_UNABLE_TO_REGISTER = 0x0008,
IBMVFC_XPORT_BUSY = 0x000A,
IBMVFC_XPORT_DEAD = 0x000B,
IBMVFC_CONFIG_ERROR = 0x000C,
IBMVFC_NAME_SERVER_FAIL = 0x000D,
IBMVFC_LINK_HALTED = 0x000E,
IBMVFC_XPORT_GENERAL = 0x8000,
};
enum ibmvfc_vios_errors {
IBMVFC_CRQ_FAILURE = 0x0001,
IBMVFC_SW_FAILURE = 0x0002,
IBMVFC_INVALID_PARAMETER = 0x0003,
IBMVFC_MISSING_PARAMETER = 0x0004,
IBMVFC_HOST_IO_BUS = 0x0005,
IBMVFC_TRANS_CANCELLED = 0x0006,
IBMVFC_TRANS_CANCELLED_IMPLICIT = 0x0007,
IBMVFC_INSUFFICIENT_RESOURCE = 0x0008,
IBMVFC_PLOGI_REQUIRED = 0x0010,
IBMVFC_COMMAND_FAILED = 0x8000,
};
enum ibmvfc_mad_types {
IBMVFC_NPIV_LOGIN = 0x0001,
IBMVFC_DISC_TARGETS = 0x0002,
IBMVFC_PORT_LOGIN = 0x0004,
IBMVFC_PROCESS_LOGIN = 0x0008,
IBMVFC_QUERY_TARGET = 0x0010,
IBMVFC_MOVE_LOGIN = 0x0020,
IBMVFC_IMPLICIT_LOGOUT = 0x0040,
IBMVFC_PASSTHRU = 0x0200,
IBMVFC_TMF_MAD = 0x0100,
IBMVFC_NPIV_LOGOUT = 0x0800,
IBMVFC_CHANNEL_ENQUIRY = 0x1000,
IBMVFC_CHANNEL_SETUP = 0x2000,
IBMVFC_CONNECTION_INFO = 0x4000,
};
struct ibmvfc_mad_common {
__be32 version;
__be32 reserved;
__be32 opcode;
__be16 status;
__be16 length;
__be64 tag;
} __packed __aligned(8);
struct ibmvfc_npiv_login_mad {
struct ibmvfc_mad_common common;
struct srp_direct_buf buffer;
} __packed __aligned(8);
struct ibmvfc_npiv_logout_mad {
struct ibmvfc_mad_common common;
} __packed __aligned(8);
#define IBMVFC_MAX_NAME 256
struct ibmvfc_npiv_login {
__be32 ostype;
#define IBMVFC_OS_LINUX 0x02
__be32 pad;
__be64 max_dma_len;
__be32 max_payload;
__be32 max_response;
__be32 partition_num;
__be32 vfc_frame_version;
__be16 fcp_version;
__be16 flags;
#define IBMVFC_CLIENT_MIGRATED 0x01
#define IBMVFC_FLUSH_ON_HALT 0x02
__be32 max_cmds;
__be64 capabilities;
#define IBMVFC_CAN_MIGRATE 0x01
#define IBMVFC_CAN_USE_CHANNELS 0x02
#define IBMVFC_CAN_HANDLE_FPIN 0x04
#define IBMVFC_CAN_USE_MAD_VERSION 0x08
#define IBMVFC_CAN_SEND_VF_WWPN 0x10
__be64 node_name;
struct srp_direct_buf async;
u8 partition_name[IBMVFC_MAX_NAME];
u8 device_name[IBMVFC_MAX_NAME];
u8 drc_name[IBMVFC_MAX_NAME];
__be64 reserved2[2];
} __packed __aligned(8);
struct ibmvfc_common_svc_parms {
__be16 fcph_version;
__be16 b2b_credit;
__be16 features;
__be16 bb_rcv_sz; /* upper nibble is BB_SC_N */
__be32 ratov;
__be32 edtov;
} __packed __aligned(4);
struct ibmvfc_service_parms {
struct ibmvfc_common_svc_parms common;
u8 port_name[8];
u8 node_name[8];
__be32 class1_parms[4];
__be32 class2_parms[4];
__be32 class3_parms[4];
__be32 obsolete[4];
__be32 vendor_version[4];
__be32 services_avail[2];
__be32 ext_len;
__be32 reserved[30];
__be32 clk_sync_qos[2];
__be32 reserved2;
} __packed __aligned(4);
struct ibmvfc_npiv_login_resp {
__be32 version;
__be16 status;
__be16 error;
__be32 flags;
#define IBMVFC_NATIVE_FC 0x01
__be32 reserved;
__be64 capabilities;
#define IBMVFC_CAN_FLUSH_ON_HALT 0x08
#define IBMVFC_CAN_SUPPRESS_ABTS 0x10
#define IBMVFC_MAD_VERSION_CAP 0x20
#define IBMVFC_HANDLE_VF_WWPN 0x40
#define IBMVFC_CAN_SUPPORT_CHANNELS 0x80
__be32 max_cmds;
__be32 scsi_id_sz;
__be64 max_dma_len;
__be64 scsi_id;
__be64 port_name;
__be64 node_name;
__be64 link_speed;
u8 partition_name[IBMVFC_MAX_NAME];
u8 device_name[IBMVFC_MAX_NAME];
u8 port_loc_code[IBMVFC_MAX_NAME];
u8 drc_name[IBMVFC_MAX_NAME];
struct ibmvfc_service_parms service_parms;
__be64 reserved2;
} __packed __aligned(8);
union ibmvfc_npiv_login_data {
struct ibmvfc_npiv_login login;
struct ibmvfc_npiv_login_resp resp;
} __packed __aligned(8);
struct ibmvfc_discover_targets_entry {
__be32 scsi_id;
__be32 pad;
__be64 wwpn;
#define IBMVFC_DISC_TGT_SCSI_ID_MASK 0x00ffffff
} __packed __aligned(8);
struct ibmvfc_discover_targets {
struct ibmvfc_mad_common common;
struct srp_direct_buf buffer;
__be32 flags;
#define IBMVFC_DISC_TGT_PORT_ID_WWPN_LIST 0x02
__be16 status;
__be16 error;
__be32 bufflen;
__be32 num_avail;
__be32 num_written;
__be64 reserved[2];
} __packed __aligned(8);
enum ibmvfc_fc_reason {
IBMVFC_INVALID_ELS_CMD_CODE = 0x01,
IBMVFC_INVALID_VERSION = 0x02,
IBMVFC_LOGICAL_ERROR = 0x03,
IBMVFC_INVALID_CT_IU_SIZE = 0x04,
IBMVFC_LOGICAL_BUSY = 0x05,
IBMVFC_PROTOCOL_ERROR = 0x07,
IBMVFC_UNABLE_TO_PERFORM_REQ = 0x09,
IBMVFC_CMD_NOT_SUPPORTED = 0x0B,
IBMVFC_SERVER_NOT_AVAIL = 0x0D,
IBMVFC_CMD_IN_PROGRESS = 0x0E,
IBMVFC_VENDOR_SPECIFIC = 0xFF,
};
enum ibmvfc_fc_type {
IBMVFC_FABRIC_REJECT = 0x01,
IBMVFC_PORT_REJECT = 0x02,
IBMVFC_LS_REJECT = 0x03,
IBMVFC_FABRIC_BUSY = 0x04,
IBMVFC_PORT_BUSY = 0x05,
IBMVFC_BASIC_REJECT = 0x06,
};
enum ibmvfc_gs_explain {
IBMVFC_PORT_NAME_NOT_REG = 0x02,
};
struct ibmvfc_port_login {
struct ibmvfc_mad_common common;
__be64 scsi_id;
__be16 reserved;
__be16 fc_service_class;
__be32 blksz;
__be32 hdr_per_blk;
__be16 status;
__be16 error; /* also fc_reason */
__be16 fc_explain;
__be16 fc_type;
__be32 reserved2;
struct ibmvfc_service_parms service_parms;
struct ibmvfc_service_parms service_parms_change;
__be64 target_wwpn;
__be64 reserved3[2];
} __packed __aligned(8);
struct ibmvfc_move_login {
struct ibmvfc_mad_common common;
__be64 old_scsi_id;
__be64 new_scsi_id;
__be64 wwpn;
__be64 node_name;
__be32 flags;
#define IBMVFC_MOVE_LOGIN_IMPLICIT_OLD_FAILED 0x01
#define IBMVFC_MOVE_LOGIN_IMPLICIT_NEW_FAILED 0x02
#define IBMVFC_MOVE_LOGIN_PORT_LOGIN_FAILED 0x04
__be32 reserved;
struct ibmvfc_service_parms service_parms;
struct ibmvfc_service_parms service_parms_change;
__be32 reserved2;
__be16 service_class;
__be16 vios_flags;
#define IBMVFC_MOVE_LOGIN_VF_NOT_SENT_ADAPTER 0x01
__be64 reserved3;
} __packed __aligned(8);
struct ibmvfc_prli_svc_parms {
u8 type;
#define IBMVFC_SCSI_FCP_TYPE 0x08
u8 type_ext;
__be16 flags;
#define IBMVFC_PRLI_ORIG_PA_VALID 0x8000
#define IBMVFC_PRLI_RESP_PA_VALID 0x4000
#define IBMVFC_PRLI_EST_IMG_PAIR 0x2000
__be32 orig_pa;
__be32 resp_pa;
__be32 service_parms;
#define IBMVFC_PRLI_TASK_RETRY 0x00000200
#define IBMVFC_PRLI_RETRY 0x00000100
#define IBMVFC_PRLI_DATA_OVERLAY 0x00000040
#define IBMVFC_PRLI_INITIATOR_FUNC 0x00000020
#define IBMVFC_PRLI_TARGET_FUNC 0x00000010
#define IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED 0x00000002
#define IBMVFC_PRLI_WR_FCP_XFER_RDY_DISABLED 0x00000001
} __packed __aligned(4);
struct ibmvfc_process_login {
struct ibmvfc_mad_common common;
__be64 scsi_id;
struct ibmvfc_prli_svc_parms parms;
u8 reserved[48];
__be16 status;
__be16 error; /* also fc_reason */
__be32 reserved2;
__be64 target_wwpn;
__be64 reserved3[2];
} __packed __aligned(8);
struct ibmvfc_query_tgt {
struct ibmvfc_mad_common common;
__be64 wwpn;
__be64 scsi_id;
__be16 status;
__be16 error;
__be16 fc_explain;
__be16 fc_type;
__be64 reserved[2];
} __packed __aligned(8);
struct ibmvfc_implicit_logout {
struct ibmvfc_mad_common common;
__be64 old_scsi_id;
__be64 reserved[2];
} __packed __aligned(8);
struct ibmvfc_tmf {
struct ibmvfc_mad_common common;
__be64 scsi_id;
struct scsi_lun lun;
__be32 flags;
#define IBMVFC_TMF_ABORT_TASK 0x02
#define IBMVFC_TMF_ABORT_TASK_SET 0x04
#define IBMVFC_TMF_LUN_RESET 0x10
#define IBMVFC_TMF_TGT_RESET 0x20
#define IBMVFC_TMF_LUA_VALID 0x40
#define IBMVFC_TMF_SUPPRESS_ABTS 0x80
__be32 cancel_key;
__be32 my_cancel_key;
__be32 pad;
__be64 target_wwpn;
__be64 task_tag;
__be64 reserved[2];
} __packed __aligned(8);
enum ibmvfc_fcp_rsp_info_codes {
RSP_NO_FAILURE = 0x00,
RSP_TMF_REJECTED = 0x04,
RSP_TMF_FAILED = 0x05,
RSP_TMF_INVALID_LUN = 0x09,
};
struct ibmvfc_fcp_rsp_info {
u8 reserved[3];
u8 rsp_code;
u8 reserved2[4];
} __packed __aligned(2);
enum ibmvfc_fcp_rsp_flags {
FCP_BIDI_RSP = 0x80,
FCP_BIDI_READ_RESID_UNDER = 0x40,
FCP_BIDI_READ_RESID_OVER = 0x20,
FCP_CONF_REQ = 0x10,
FCP_RESID_UNDER = 0x08,
FCP_RESID_OVER = 0x04,
FCP_SNS_LEN_VALID = 0x02,
FCP_RSP_LEN_VALID = 0x01,
};
union ibmvfc_fcp_rsp_data {
struct ibmvfc_fcp_rsp_info info;
u8 sense[SCSI_SENSE_BUFFERSIZE + sizeof(struct ibmvfc_fcp_rsp_info)];
} __packed __aligned(8);
struct ibmvfc_fcp_rsp {
__be64 reserved;
__be16 retry_delay_timer;
u8 flags;
u8 scsi_status;
__be32 fcp_resid;
__be32 fcp_sense_len;
__be32 fcp_rsp_len;
union ibmvfc_fcp_rsp_data data;
} __packed __aligned(8);
enum ibmvfc_cmd_flags {
IBMVFC_SCATTERLIST = 0x0001,
IBMVFC_NO_MEM_DESC = 0x0002,
IBMVFC_READ = 0x0004,
IBMVFC_WRITE = 0x0008,
IBMVFC_TMF = 0x0080,
IBMVFC_CLASS_3_ERR = 0x0100,
};
enum ibmvfc_fc_task_attr {
IBMVFC_SIMPLE_TASK = 0x00,
IBMVFC_HEAD_OF_QUEUE = 0x01,
IBMVFC_ORDERED_TASK = 0x02,
IBMVFC_ACA_TASK = 0x04,
};
enum ibmvfc_fc_tmf_flags {
IBMVFC_ABORT_TASK_SET = 0x02,
IBMVFC_LUN_RESET = 0x10,
IBMVFC_TARGET_RESET = 0x20,
};
struct ibmvfc_fcp_cmd_iu {
struct scsi_lun lun;
u8 crn;
u8 pri_task_attr;
u8 tmf_flags;
u8 add_cdb_len;
#define IBMVFC_RDDATA 0x02
#define IBMVFC_WRDATA 0x01
u8 cdb[IBMVFC_MAX_CDB_LEN];
__be32 xfer_len;
} __packed __aligned(4);
struct ibmvfc_cmd {
__be64 task_tag;
__be32 frame_type;
__be32 payload_len;
__be32 resp_len;
__be32 adapter_resid;
__be16 status;
__be16 error;
__be16 flags;
__be16 response_flags;
#define IBMVFC_ADAPTER_RESID_VALID 0x01
__be32 cancel_key;
__be32 exchange_id;
struct srp_direct_buf ext_func;
struct srp_direct_buf ioba;
struct srp_direct_buf resp;
__be64 correlation;
__be64 tgt_scsi_id;
__be64 tag;
__be64 target_wwpn;
__be64 reserved3;
union {
struct {
struct ibmvfc_fcp_cmd_iu iu;
struct ibmvfc_fcp_rsp rsp;
} v1;
struct {
__be64 reserved4;
struct ibmvfc_fcp_cmd_iu iu;
struct ibmvfc_fcp_rsp rsp;
} v2;
};
} __packed __aligned(8);
struct ibmvfc_passthru_fc_iu {
__be32 payload[7];
#define IBMVFC_ADISC 0x52000000
__be32 response[7];
};
struct ibmvfc_passthru_iu {
__be64 task_tag;
__be32 cmd_len;
__be32 rsp_len;
__be16 status;
__be16 error;
__be32 flags;
#define IBMVFC_FC_ELS 0x01
#define IBMVFC_FC_CT_IU 0x02
__be32 cancel_key;
#define IBMVFC_PASSTHRU_CANCEL_KEY 0x80000000
#define IBMVFC_INTERNAL_CANCEL_KEY 0x80000001
__be32 reserved;
struct srp_direct_buf cmd;
struct srp_direct_buf rsp;
__be64 correlation;
__be64 scsi_id;
__be64 tag;
__be64 target_wwpn;
__be64 reserved2[2];
} __packed __aligned(8);
struct ibmvfc_passthru_mad {
struct ibmvfc_mad_common common;
struct srp_direct_buf cmd_ioba;
struct ibmvfc_passthru_iu iu;
struct ibmvfc_passthru_fc_iu fc_iu;
} __packed __aligned(8);
struct ibmvfc_channel_enquiry {
struct ibmvfc_mad_common common;
__be32 flags;
#define IBMVFC_NO_CHANNELS_TO_CRQ_SUPPORT 0x01
#define IBMVFC_SUPPORT_VARIABLE_SUBQ_MSG 0x02
#define IBMVFC_NO_N_TO_M_CHANNELS_SUPPORT 0x04
__be32 num_scsi_subq_channels;
__be32 num_nvmeof_subq_channels;
__be32 num_scsi_vas_channels;
__be32 num_nvmeof_vas_channels;
} __packed __aligned(8);
struct ibmvfc_channel_setup_mad {
struct ibmvfc_mad_common common;
struct srp_direct_buf buffer;
} __packed __aligned(8);
#define IBMVFC_MAX_CHANNELS 502
struct ibmvfc_channel_setup {
__be32 flags;
#define IBMVFC_CANCEL_CHANNELS 0x01
#define IBMVFC_USE_BUFFER 0x02
#define IBMVFC_CHANNELS_CANCELED 0x04
__be32 reserved;
__be32 num_scsi_subq_channels;
__be32 num_nvmeof_subq_channels;
__be32 num_scsi_vas_channels;
__be32 num_nvmeof_vas_channels;
struct srp_direct_buf buffer;
__be64 reserved2[5];
__be64 channel_handles[IBMVFC_MAX_CHANNELS];
} __packed __aligned(8);
struct ibmvfc_connection_info {
struct ibmvfc_mad_common common;
__be64 information_bits;
#define IBMVFC_NO_FC_IO_CHANNEL 0x01
#define IBMVFC_NO_PHYP_VAS 0x02
#define IBMVFC_NO_PHYP_SUBQ 0x04
#define IBMVFC_PHYP_DEPRECATED_SUBQ 0x08
#define IBMVFC_PHYP_PRESERVED_SUBQ 0x10
#define IBMVFC_PHYP_FULL_SUBQ 0x20
__be64 reserved[16];
} __packed __aligned(8);
struct ibmvfc_trace_start_entry {
u32 xfer_len;
} __packed;
struct ibmvfc_trace_end_entry {
u16 status;
u16 error;
u8 fcp_rsp_flags;
u8 rsp_code;
u8 scsi_status;
u8 reserved;
} __packed;
struct ibmvfc_trace_entry {
struct ibmvfc_event *evt;
u32 time;
u32 scsi_id;
u32 lun;
u8 fmt;
u8 op_code;
u8 tmf_flags;
u8 type;
#define IBMVFC_TRC_START 0x00
#define IBMVFC_TRC_END 0xff
union {
struct ibmvfc_trace_start_entry start;
struct ibmvfc_trace_end_entry end;
} u;
} __packed __aligned(8);
enum ibmvfc_crq_formats {
IBMVFC_CMD_FORMAT = 0x01,
IBMVFC_ASYNC_EVENT = 0x02,
IBMVFC_MAD_FORMAT = 0x04,
};
enum ibmvfc_async_event {
IBMVFC_AE_ELS_PLOGI = 0x0001,
IBMVFC_AE_ELS_LOGO = 0x0002,
IBMVFC_AE_ELS_PRLO = 0x0004,
IBMVFC_AE_SCN_NPORT = 0x0008,
IBMVFC_AE_SCN_GROUP = 0x0010,
IBMVFC_AE_SCN_DOMAIN = 0x0020,
IBMVFC_AE_SCN_FABRIC = 0x0040,
IBMVFC_AE_LINK_UP = 0x0080,
IBMVFC_AE_LINK_DOWN = 0x0100,
IBMVFC_AE_LINK_DEAD = 0x0200,
IBMVFC_AE_HALT = 0x0400,
IBMVFC_AE_RESUME = 0x0800,
IBMVFC_AE_ADAPTER_FAILED = 0x1000,
IBMVFC_AE_FPIN = 0x2000,
};
struct ibmvfc_async_desc {
const char *desc;
enum ibmvfc_async_event ae;
int log_level;
};
struct ibmvfc_crq {
volatile u8 valid;
volatile u8 format;
u8 reserved[6];
volatile __be64 ioba;
} __packed __aligned(8);
struct ibmvfc_sub_crq {
struct ibmvfc_crq crq;
__be64 reserved[2];
} __packed __aligned(8);
enum ibmvfc_ae_link_state {
IBMVFC_AE_LS_LINK_UP = 0x01,
IBMVFC_AE_LS_LINK_BOUNCED = 0x02,
IBMVFC_AE_LS_LINK_DOWN = 0x04,
IBMVFC_AE_LS_LINK_DEAD = 0x08,
};
enum ibmvfc_ae_fpin_status {
IBMVFC_AE_FPIN_LINK_CONGESTED = 0x1,
IBMVFC_AE_FPIN_PORT_CONGESTED = 0x2,
IBMVFC_AE_FPIN_PORT_CLEARED = 0x3,
IBMVFC_AE_FPIN_PORT_DEGRADED = 0x4,
};
struct ibmvfc_async_crq {
volatile u8 valid;
u8 link_state;
u8 fpin_status;
u8 pad;
__be32 pad2;
volatile __be64 event;
volatile __be64 scsi_id;
volatile __be64 wwpn;
volatile __be64 node_name;
__be64 reserved;
} __packed __aligned(8);
union ibmvfc_iu {
struct ibmvfc_mad_common mad_common;
struct ibmvfc_npiv_login_mad npiv_login;
struct ibmvfc_npiv_logout_mad npiv_logout;
struct ibmvfc_discover_targets discover_targets;
struct ibmvfc_port_login plogi;
struct ibmvfc_process_login prli;
struct ibmvfc_move_login move_login;
struct ibmvfc_query_tgt query_tgt;
struct ibmvfc_implicit_logout implicit_logout;
struct ibmvfc_tmf tmf;
struct ibmvfc_cmd cmd;
struct ibmvfc_passthru_mad passthru;
struct ibmvfc_channel_enquiry channel_enquiry;
struct ibmvfc_channel_setup_mad channel_setup;
struct ibmvfc_connection_info connection_info;
} __packed __aligned(8);
enum ibmvfc_target_action {
IBMVFC_TGT_ACTION_NONE = 0,
IBMVFC_TGT_ACTION_INIT,
IBMVFC_TGT_ACTION_INIT_WAIT,
IBMVFC_TGT_ACTION_LOGOUT_RPORT,
IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT,
IBMVFC_TGT_ACTION_DEL_RPORT,
IBMVFC_TGT_ACTION_DELETED_RPORT,
IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT,
IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT,
};
struct ibmvfc_target {
struct list_head queue;
struct ibmvfc_host *vhost;
u64 scsi_id;
u64 wwpn;
u64 new_scsi_id;
struct fc_rport *rport;
int target_id;
enum ibmvfc_target_action action;
int need_login;
int add_rport;
int init_retries;
int logo_rcvd;
int move_login;
u32 cancel_key;
struct ibmvfc_service_parms service_parms;
struct ibmvfc_service_parms service_parms_change;
struct fc_rport_identifiers ids;
void (*job_step) (struct ibmvfc_target *);
struct timer_list timer;
struct kref kref;
};
/* a unit of work for the hosting partition */
struct ibmvfc_event {
struct list_head queue_list;
struct list_head cancel;
struct ibmvfc_host *vhost;
struct ibmvfc_queue *queue;
struct ibmvfc_target *tgt;
struct scsi_cmnd *cmnd;
atomic_t free;
union ibmvfc_iu *xfer_iu;
void (*done)(struct ibmvfc_event *evt);
void (*_done)(struct ibmvfc_event *evt);
struct ibmvfc_crq crq;
union ibmvfc_iu iu;
union ibmvfc_iu *sync_iu;
struct srp_direct_buf *ext_list;
dma_addr_t ext_list_token;
struct completion comp;
struct completion *eh_comp;
struct timer_list timer;
u16 hwq;
};
/* a pool of event structs for use */
struct ibmvfc_event_pool {
struct ibmvfc_event *events;
u32 size;
union ibmvfc_iu *iu_storage;
dma_addr_t iu_token;
};
enum ibmvfc_msg_fmt {
IBMVFC_CRQ_FMT = 0,
IBMVFC_ASYNC_FMT,
IBMVFC_SUB_CRQ_FMT,
};
union ibmvfc_msgs {
void *handle;
struct ibmvfc_crq *crq;
struct ibmvfc_async_crq *async;
struct ibmvfc_sub_crq *scrq;
};
struct ibmvfc_queue {
union ibmvfc_msgs msgs;
dma_addr_t msg_token;
enum ibmvfc_msg_fmt fmt;
int size, cur;
spinlock_t _lock;
spinlock_t *q_lock;
struct ibmvfc_event_pool evt_pool;
struct list_head sent;
struct list_head free;
spinlock_t l_lock;
union ibmvfc_iu cancel_rsp;
/* Sub-CRQ fields */
struct ibmvfc_host *vhost;
unsigned long cookie;
unsigned long vios_cookie;
unsigned long hw_irq;
unsigned long irq;
unsigned long hwq_id;
char name[32];
};
struct ibmvfc_scsi_channels {
struct ibmvfc_queue *scrqs;
unsigned int active_queues;
};
enum ibmvfc_host_action {
IBMVFC_HOST_ACTION_NONE = 0,
IBMVFC_HOST_ACTION_RESET,
IBMVFC_HOST_ACTION_REENABLE,
IBMVFC_HOST_ACTION_LOGO,
IBMVFC_HOST_ACTION_LOGO_WAIT,
IBMVFC_HOST_ACTION_INIT,
IBMVFC_HOST_ACTION_INIT_WAIT,
IBMVFC_HOST_ACTION_QUERY,
IBMVFC_HOST_ACTION_QUERY_TGTS,
IBMVFC_HOST_ACTION_TGT_DEL,
IBMVFC_HOST_ACTION_ALLOC_TGTS,
IBMVFC_HOST_ACTION_TGT_INIT,
IBMVFC_HOST_ACTION_TGT_DEL_FAILED,
};
enum ibmvfc_host_state {
IBMVFC_NO_CRQ = 0,
IBMVFC_INITIALIZING,
IBMVFC_ACTIVE,
IBMVFC_HALTED,
IBMVFC_LINK_DOWN,
IBMVFC_LINK_DEAD,
IBMVFC_HOST_OFFLINE,
};
struct ibmvfc_host {
char name[8];
struct list_head queue;
struct Scsi_Host *host;
enum ibmvfc_host_state state;
enum ibmvfc_host_action action;
#define IBMVFC_NUM_TRACE_INDEX_BITS 8
#define IBMVFC_NUM_TRACE_ENTRIES (1 << IBMVFC_NUM_TRACE_INDEX_BITS)
#define IBMVFC_TRACE_INDEX_MASK (IBMVFC_NUM_TRACE_ENTRIES - 1)
#define IBMVFC_TRACE_SIZE (sizeof(struct ibmvfc_trace_entry) * IBMVFC_NUM_TRACE_ENTRIES)
struct ibmvfc_trace_entry *trace;
atomic_t trace_index;
int num_targets;
struct list_head targets;
struct list_head purge;
struct device *dev;
struct dma_pool *sg_pool;
mempool_t *tgt_pool;
struct ibmvfc_queue crq;
struct ibmvfc_queue async_crq;
struct ibmvfc_scsi_channels scsi_scrqs;
struct ibmvfc_npiv_login login_info;
union ibmvfc_npiv_login_data *login_buf;
dma_addr_t login_buf_dma;
struct ibmvfc_channel_setup *channel_setup_buf;
dma_addr_t channel_setup_dma;
int disc_buf_sz;
int log_level;
struct ibmvfc_discover_targets_entry *disc_buf;
struct mutex passthru_mutex;
int max_vios_scsi_channels;
int task_set;
int init_retries;
int discovery_threads;
int abort_threads;
int client_migrated;
int reinit;
int delay_init;
int scan_complete;
int logged_in;
int mq_enabled;
int using_channels;
int do_enquiry;
int client_scsi_channels;
int aborting_passthru;
int events_to_log;
#define IBMVFC_AE_LINKUP 0x0001
#define IBMVFC_AE_LINKDOWN 0x0002
#define IBMVFC_AE_RSCN 0x0004
dma_addr_t disc_buf_dma;
unsigned int partition_number;
char partition_name[97];
void (*job_step) (struct ibmvfc_host *);
struct task_struct *work_thread;
struct tasklet_struct tasklet;
struct work_struct rport_add_work_q;
wait_queue_head_t init_wait_q;
wait_queue_head_t work_wait_q;
};
#define DBG_CMD(CMD) do { if (ibmvfc_debug) CMD; } while (0)
#define tgt_dbg(t, fmt, ...) \
DBG_CMD(dev_info((t)->vhost->dev, "%llX: " fmt, (t)->scsi_id, ##__VA_ARGS__))
#define tgt_info(t, fmt, ...) \
dev_info((t)->vhost->dev, "%llX: " fmt, (t)->scsi_id, ##__VA_ARGS__)
#define tgt_err(t, fmt, ...) \
dev_err((t)->vhost->dev, "%llX: " fmt, (t)->scsi_id, ##__VA_ARGS__)
#define tgt_log(t, level, fmt, ...) \
do { \
if ((t)->vhost->log_level >= level) \
tgt_err(t, fmt, ##__VA_ARGS__); \
} while (0)
#define ibmvfc_dbg(vhost, ...) \
DBG_CMD(dev_info((vhost)->dev, ##__VA_ARGS__))
#define ibmvfc_log(vhost, level, ...) \
do { \
if ((vhost)->log_level >= level) \
dev_err((vhost)->dev, ##__VA_ARGS__); \
} while (0)
#define ENTER DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Entering %s\n", __func__))
#define LEAVE DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Leaving %s\n", __func__))
#ifdef CONFIG_SCSI_IBMVFC_TRACE
#define ibmvfc_create_trace_file(kobj, attr) sysfs_create_bin_file(kobj, attr)
#define ibmvfc_remove_trace_file(kobj, attr) sysfs_remove_bin_file(kobj, attr)
#else
#define ibmvfc_create_trace_file(kobj, attr) 0
#define ibmvfc_remove_trace_file(kobj, attr) do { } while (0)
#endif
#endif
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