| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter |
| * |
| * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation |
| * |
| * Copyright (C) IBM Corporation, 2008 |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/dmapool.h> |
| #include <linux/delay.h> |
| #include <linux/interrupt.h> |
| #include <linux/irqdomain.h> |
| #include <linux/kthread.h> |
| #include <linux/slab.h> |
| #include <linux/of.h> |
| #include <linux/pm.h> |
| #include <linux/stringify.h> |
| #include <linux/bsg-lib.h> |
| #include <asm/firmware.h> |
| #include <asm/irq.h> |
| #include <asm/vio.h> |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_cmnd.h> |
| #include <scsi/scsi_host.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_tcq.h> |
| #include <scsi/scsi_transport_fc.h> |
| #include <scsi/scsi_bsg_fc.h> |
| #include "ibmvfc.h" |
| |
| static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; |
| static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; |
| static u64 max_lun = IBMVFC_MAX_LUN; |
| static unsigned int max_targets = IBMVFC_MAX_TARGETS; |
| static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; |
| static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; |
| static unsigned int ibmvfc_debug = IBMVFC_DEBUG; |
| static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; |
| static unsigned int cls3_error = IBMVFC_CLS3_ERROR; |
| static unsigned int mq_enabled = IBMVFC_MQ; |
| static unsigned int nr_scsi_hw_queues = IBMVFC_SCSI_HW_QUEUES; |
| static unsigned int nr_scsi_channels = IBMVFC_SCSI_CHANNELS; |
| static unsigned int mig_channels_only = IBMVFC_MIG_NO_SUB_TO_CRQ; |
| static unsigned int mig_no_less_channels = IBMVFC_MIG_NO_N_TO_M; |
| |
| static LIST_HEAD(ibmvfc_head); |
| static DEFINE_SPINLOCK(ibmvfc_driver_lock); |
| static struct scsi_transport_template *ibmvfc_transport_template; |
| |
| MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); |
| MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(IBMVFC_DRIVER_VERSION); |
| |
| module_param_named(mq, mq_enabled, uint, S_IRUGO); |
| MODULE_PARM_DESC(mq, "Enable multiqueue support. " |
| "[Default=" __stringify(IBMVFC_MQ) "]"); |
| module_param_named(scsi_host_queues, nr_scsi_hw_queues, uint, S_IRUGO); |
| MODULE_PARM_DESC(scsi_host_queues, "Number of SCSI Host submission queues. " |
| "[Default=" __stringify(IBMVFC_SCSI_HW_QUEUES) "]"); |
| module_param_named(scsi_hw_channels, nr_scsi_channels, uint, S_IRUGO); |
| MODULE_PARM_DESC(scsi_hw_channels, "Number of hw scsi channels to request. " |
| "[Default=" __stringify(IBMVFC_SCSI_CHANNELS) "]"); |
| module_param_named(mig_channels_only, mig_channels_only, uint, S_IRUGO); |
| MODULE_PARM_DESC(mig_channels_only, "Prevent migration to non-channelized system. " |
| "[Default=" __stringify(IBMVFC_MIG_NO_SUB_TO_CRQ) "]"); |
| module_param_named(mig_no_less_channels, mig_no_less_channels, uint, S_IRUGO); |
| MODULE_PARM_DESC(mig_no_less_channels, "Prevent migration to system with less channels. " |
| "[Default=" __stringify(IBMVFC_MIG_NO_N_TO_M) "]"); |
| |
| module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " |
| "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); |
| module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(default_timeout, |
| "Default timeout in seconds for initialization and EH commands. " |
| "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); |
| module_param_named(max_requests, max_requests, uint, S_IRUGO); |
| MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " |
| "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); |
| module_param_named(max_lun, max_lun, ullong, S_IRUGO); |
| MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " |
| "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); |
| module_param_named(max_targets, max_targets, uint, S_IRUGO); |
| MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " |
| "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); |
| module_param_named(disc_threads, disc_threads, uint, S_IRUGO); |
| MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " |
| "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); |
| module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug, "Enable driver debug information. " |
| "[Default=" __stringify(IBMVFC_DEBUG) "]"); |
| module_param_named(log_level, log_level, uint, 0); |
| MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " |
| "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); |
| module_param_named(cls3_error, cls3_error, uint, 0); |
| MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. " |
| "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]"); |
| |
| static const struct { |
| u16 status; |
| u16 error; |
| u8 result; |
| u8 retry; |
| int log; |
| char *name; |
| } cmd_status [] = { |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, |
| |
| { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, |
| |
| { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, |
| |
| { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, |
| { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." }, |
| }; |
| |
| static void ibmvfc_npiv_login(struct ibmvfc_host *); |
| static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); |
| static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); |
| static void ibmvfc_tgt_query_target(struct ibmvfc_target *); |
| static void ibmvfc_npiv_logout(struct ibmvfc_host *); |
| static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *); |
| static void ibmvfc_tgt_move_login(struct ibmvfc_target *); |
| |
| static void ibmvfc_dereg_sub_crqs(struct ibmvfc_host *); |
| static void ibmvfc_reg_sub_crqs(struct ibmvfc_host *); |
| |
| static const char *unknown_error = "unknown error"; |
| |
| static long h_reg_sub_crq(unsigned long unit_address, unsigned long ioba, |
| unsigned long length, unsigned long *cookie, |
| unsigned long *irq) |
| { |
| unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; |
| long rc; |
| |
| rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, ioba, length); |
| *cookie = retbuf[0]; |
| *irq = retbuf[1]; |
| |
| return rc; |
| } |
| |
| static int ibmvfc_check_caps(struct ibmvfc_host *vhost, unsigned long cap_flags) |
| { |
| u64 host_caps = be64_to_cpu(vhost->login_buf->resp.capabilities); |
| |
| return (host_caps & cap_flags) ? 1 : 0; |
| } |
| |
| static struct ibmvfc_fcp_cmd_iu *ibmvfc_get_fcp_iu(struct ibmvfc_host *vhost, |
| struct ibmvfc_cmd *vfc_cmd) |
| { |
| if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) |
| return &vfc_cmd->v2.iu; |
| else |
| return &vfc_cmd->v1.iu; |
| } |
| |
| static struct ibmvfc_fcp_rsp *ibmvfc_get_fcp_rsp(struct ibmvfc_host *vhost, |
| struct ibmvfc_cmd *vfc_cmd) |
| { |
| if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) |
| return &vfc_cmd->v2.rsp; |
| else |
| return &vfc_cmd->v1.rsp; |
| } |
| |
| #ifdef CONFIG_SCSI_IBMVFC_TRACE |
| /** |
| * ibmvfc_trc_start - Log a start trace entry |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_trc_start(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; |
| struct ibmvfc_mad_common *mad = &evt->iu.mad_common; |
| struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); |
| struct ibmvfc_trace_entry *entry; |
| int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; |
| |
| entry = &vhost->trace[index]; |
| entry->evt = evt; |
| entry->time = jiffies; |
| entry->fmt = evt->crq.format; |
| entry->type = IBMVFC_TRC_START; |
| |
| switch (entry->fmt) { |
| case IBMVFC_CMD_FORMAT: |
| entry->op_code = iu->cdb[0]; |
| entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); |
| entry->lun = scsilun_to_int(&iu->lun); |
| entry->tmf_flags = iu->tmf_flags; |
| entry->u.start.xfer_len = be32_to_cpu(iu->xfer_len); |
| break; |
| case IBMVFC_MAD_FORMAT: |
| entry->op_code = be32_to_cpu(mad->opcode); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| /** |
| * ibmvfc_trc_end - Log an end trace entry |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_trc_end(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; |
| struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; |
| struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); |
| struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); |
| struct ibmvfc_trace_entry *entry; |
| int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; |
| |
| entry = &vhost->trace[index]; |
| entry->evt = evt; |
| entry->time = jiffies; |
| entry->fmt = evt->crq.format; |
| entry->type = IBMVFC_TRC_END; |
| |
| switch (entry->fmt) { |
| case IBMVFC_CMD_FORMAT: |
| entry->op_code = iu->cdb[0]; |
| entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); |
| entry->lun = scsilun_to_int(&iu->lun); |
| entry->tmf_flags = iu->tmf_flags; |
| entry->u.end.status = be16_to_cpu(vfc_cmd->status); |
| entry->u.end.error = be16_to_cpu(vfc_cmd->error); |
| entry->u.end.fcp_rsp_flags = rsp->flags; |
| entry->u.end.rsp_code = rsp->data.info.rsp_code; |
| entry->u.end.scsi_status = rsp->scsi_status; |
| break; |
| case IBMVFC_MAD_FORMAT: |
| entry->op_code = be32_to_cpu(mad->opcode); |
| entry->u.end.status = be16_to_cpu(mad->status); |
| break; |
| default: |
| break; |
| |
| } |
| } |
| |
| #else |
| #define ibmvfc_trc_start(evt) do { } while (0) |
| #define ibmvfc_trc_end(evt) do { } while (0) |
| #endif |
| |
| /** |
| * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response |
| * @status: status / error class |
| * @error: error |
| * |
| * Return value: |
| * index into cmd_status / -EINVAL on failure |
| **/ |
| static int ibmvfc_get_err_index(u16 status, u16 error) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(cmd_status); i++) |
| if ((cmd_status[i].status & status) == cmd_status[i].status && |
| cmd_status[i].error == error) |
| return i; |
| |
| return -EINVAL; |
| } |
| |
| /** |
| * ibmvfc_get_cmd_error - Find the error description for the fcp response |
| * @status: status / error class |
| * @error: error |
| * |
| * Return value: |
| * error description string |
| **/ |
| static const char *ibmvfc_get_cmd_error(u16 status, u16 error) |
| { |
| int rc = ibmvfc_get_err_index(status, error); |
| if (rc >= 0) |
| return cmd_status[rc].name; |
| return unknown_error; |
| } |
| |
| /** |
| * ibmvfc_get_err_result - Find the scsi status to return for the fcp response |
| * @vhost: ibmvfc host struct |
| * @vfc_cmd: ibmvfc command struct |
| * |
| * Return value: |
| * SCSI result value to return for completed command |
| **/ |
| static int ibmvfc_get_err_result(struct ibmvfc_host *vhost, struct ibmvfc_cmd *vfc_cmd) |
| { |
| int err; |
| struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); |
| int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); |
| |
| if ((rsp->flags & FCP_RSP_LEN_VALID) && |
| ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || |
| rsp->data.info.rsp_code)) |
| return DID_ERROR << 16; |
| |
| err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); |
| if (err >= 0) |
| return rsp->scsi_status | (cmd_status[err].result << 16); |
| return rsp->scsi_status | (DID_ERROR << 16); |
| } |
| |
| /** |
| * ibmvfc_retry_cmd - Determine if error status is retryable |
| * @status: status / error class |
| * @error: error |
| * |
| * Return value: |
| * 1 if error should be retried / 0 if it should not |
| **/ |
| static int ibmvfc_retry_cmd(u16 status, u16 error) |
| { |
| int rc = ibmvfc_get_err_index(status, error); |
| |
| if (rc >= 0) |
| return cmd_status[rc].retry; |
| return 1; |
| } |
| |
| static const char *unknown_fc_explain = "unknown fc explain"; |
| |
| static const struct { |
| u16 fc_explain; |
| char *name; |
| } ls_explain [] = { |
| { 0x00, "no additional explanation" }, |
| { 0x01, "service parameter error - options" }, |
| { 0x03, "service parameter error - initiator control" }, |
| { 0x05, "service parameter error - recipient control" }, |
| { 0x07, "service parameter error - received data field size" }, |
| { 0x09, "service parameter error - concurrent seq" }, |
| { 0x0B, "service parameter error - credit" }, |
| { 0x0D, "invalid N_Port/F_Port_Name" }, |
| { 0x0E, "invalid node/Fabric Name" }, |
| { 0x0F, "invalid common service parameters" }, |
| { 0x11, "invalid association header" }, |
| { 0x13, "association header required" }, |
| { 0x15, "invalid originator S_ID" }, |
| { 0x17, "invalid OX_ID-RX-ID combination" }, |
| { 0x19, "command (request) already in progress" }, |
| { 0x1E, "N_Port Login requested" }, |
| { 0x1F, "Invalid N_Port_ID" }, |
| }; |
| |
| static const struct { |
| u16 fc_explain; |
| char *name; |
| } gs_explain [] = { |
| { 0x00, "no additional explanation" }, |
| { 0x01, "port identifier not registered" }, |
| { 0x02, "port name not registered" }, |
| { 0x03, "node name not registered" }, |
| { 0x04, "class of service not registered" }, |
| { 0x06, "initial process associator not registered" }, |
| { 0x07, "FC-4 TYPEs not registered" }, |
| { 0x08, "symbolic port name not registered" }, |
| { 0x09, "symbolic node name not registered" }, |
| { 0x0A, "port type not registered" }, |
| { 0xF0, "authorization exception" }, |
| { 0xF1, "authentication exception" }, |
| { 0xF2, "data base full" }, |
| { 0xF3, "data base empty" }, |
| { 0xF4, "processing request" }, |
| { 0xF5, "unable to verify connection" }, |
| { 0xF6, "devices not in a common zone" }, |
| }; |
| |
| /** |
| * ibmvfc_get_ls_explain - Return the FC Explain description text |
| * @status: FC Explain status |
| * |
| * Returns: |
| * error string |
| **/ |
| static const char *ibmvfc_get_ls_explain(u16 status) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(ls_explain); i++) |
| if (ls_explain[i].fc_explain == status) |
| return ls_explain[i].name; |
| |
| return unknown_fc_explain; |
| } |
| |
| /** |
| * ibmvfc_get_gs_explain - Return the FC Explain description text |
| * @status: FC Explain status |
| * |
| * Returns: |
| * error string |
| **/ |
| static const char *ibmvfc_get_gs_explain(u16 status) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(gs_explain); i++) |
| if (gs_explain[i].fc_explain == status) |
| return gs_explain[i].name; |
| |
| return unknown_fc_explain; |
| } |
| |
| static const struct { |
| enum ibmvfc_fc_type fc_type; |
| char *name; |
| } fc_type [] = { |
| { IBMVFC_FABRIC_REJECT, "fabric reject" }, |
| { IBMVFC_PORT_REJECT, "port reject" }, |
| { IBMVFC_LS_REJECT, "ELS reject" }, |
| { IBMVFC_FABRIC_BUSY, "fabric busy" }, |
| { IBMVFC_PORT_BUSY, "port busy" }, |
| { IBMVFC_BASIC_REJECT, "basic reject" }, |
| }; |
| |
| static const char *unknown_fc_type = "unknown fc type"; |
| |
| /** |
| * ibmvfc_get_fc_type - Return the FC Type description text |
| * @status: FC Type error status |
| * |
| * Returns: |
| * error string |
| **/ |
| static const char *ibmvfc_get_fc_type(u16 status) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(fc_type); i++) |
| if (fc_type[i].fc_type == status) |
| return fc_type[i].name; |
| |
| return unknown_fc_type; |
| } |
| |
| /** |
| * ibmvfc_set_tgt_action - Set the next init action for the target |
| * @tgt: ibmvfc target struct |
| * @action: action to perform |
| * |
| * Returns: |
| * 0 if action changed / non-zero if not changed |
| **/ |
| static int ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, |
| enum ibmvfc_target_action action) |
| { |
| int rc = -EINVAL; |
| |
| switch (tgt->action) { |
| case IBMVFC_TGT_ACTION_LOGOUT_RPORT: |
| if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT || |
| action == IBMVFC_TGT_ACTION_DEL_RPORT) { |
| tgt->action = action; |
| rc = 0; |
| } |
| break; |
| case IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT: |
| if (action == IBMVFC_TGT_ACTION_DEL_RPORT || |
| action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { |
| tgt->action = action; |
| rc = 0; |
| } |
| break; |
| case IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT: |
| if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { |
| tgt->action = action; |
| rc = 0; |
| } |
| break; |
| case IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT: |
| if (action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { |
| tgt->action = action; |
| rc = 0; |
| } |
| break; |
| case IBMVFC_TGT_ACTION_DEL_RPORT: |
| if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) { |
| tgt->action = action; |
| rc = 0; |
| } |
| break; |
| case IBMVFC_TGT_ACTION_DELETED_RPORT: |
| break; |
| default: |
| tgt->action = action; |
| rc = 0; |
| break; |
| } |
| |
| if (action >= IBMVFC_TGT_ACTION_LOGOUT_RPORT) |
| tgt->add_rport = 0; |
| |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_set_host_state - Set the state for the host |
| * @vhost: ibmvfc host struct |
| * @state: state to set host to |
| * |
| * Returns: |
| * 0 if state changed / non-zero if not changed |
| **/ |
| static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, |
| enum ibmvfc_host_state state) |
| { |
| int rc = 0; |
| |
| switch (vhost->state) { |
| case IBMVFC_HOST_OFFLINE: |
| rc = -EINVAL; |
| break; |
| default: |
| vhost->state = state; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_set_host_action - Set the next init action for the host |
| * @vhost: ibmvfc host struct |
| * @action: action to perform |
| * |
| **/ |
| static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, |
| enum ibmvfc_host_action action) |
| { |
| switch (action) { |
| case IBMVFC_HOST_ACTION_ALLOC_TGTS: |
| if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) |
| vhost->action = action; |
| break; |
| case IBMVFC_HOST_ACTION_LOGO_WAIT: |
| if (vhost->action == IBMVFC_HOST_ACTION_LOGO) |
| vhost->action = action; |
| break; |
| case IBMVFC_HOST_ACTION_INIT_WAIT: |
| if (vhost->action == IBMVFC_HOST_ACTION_INIT) |
| vhost->action = action; |
| break; |
| case IBMVFC_HOST_ACTION_QUERY: |
| switch (vhost->action) { |
| case IBMVFC_HOST_ACTION_INIT_WAIT: |
| case IBMVFC_HOST_ACTION_NONE: |
| case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
| vhost->action = action; |
| break; |
| default: |
| break; |
| } |
| break; |
| case IBMVFC_HOST_ACTION_TGT_INIT: |
| if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) |
| vhost->action = action; |
| break; |
| case IBMVFC_HOST_ACTION_REENABLE: |
| case IBMVFC_HOST_ACTION_RESET: |
| vhost->action = action; |
| break; |
| case IBMVFC_HOST_ACTION_INIT: |
| case IBMVFC_HOST_ACTION_TGT_DEL: |
| case IBMVFC_HOST_ACTION_LOGO: |
| case IBMVFC_HOST_ACTION_QUERY_TGTS: |
| case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
| case IBMVFC_HOST_ACTION_NONE: |
| default: |
| switch (vhost->action) { |
| case IBMVFC_HOST_ACTION_RESET: |
| case IBMVFC_HOST_ACTION_REENABLE: |
| break; |
| default: |
| vhost->action = action; |
| break; |
| } |
| break; |
| } |
| } |
| |
| /** |
| * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * nothing |
| **/ |
| static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) |
| { |
| if (vhost->action == IBMVFC_HOST_ACTION_NONE && |
| vhost->state == IBMVFC_ACTIVE) { |
| if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
| scsi_block_requests(vhost->host); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| } |
| } else |
| vhost->reinit = 1; |
| |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_del_tgt - Schedule cleanup and removal of the target |
| * @tgt: ibmvfc target struct |
| **/ |
| static void ibmvfc_del_tgt(struct ibmvfc_target *tgt) |
| { |
| if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT)) { |
| tgt->job_step = ibmvfc_tgt_implicit_logout_and_del; |
| tgt->init_retries = 0; |
| } |
| wake_up(&tgt->vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_link_down - Handle a link down event from the adapter |
| * @vhost: ibmvfc host struct |
| * @state: ibmvfc host state to enter |
| * |
| **/ |
| static void ibmvfc_link_down(struct ibmvfc_host *vhost, |
| enum ibmvfc_host_state state) |
| { |
| struct ibmvfc_target *tgt; |
| |
| ENTER; |
| scsi_block_requests(vhost->host); |
| list_for_each_entry(tgt, &vhost->targets, queue) |
| ibmvfc_del_tgt(tgt); |
| ibmvfc_set_host_state(vhost, state); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); |
| vhost->events_to_log |= IBMVFC_AE_LINKDOWN; |
| wake_up(&vhost->work_wait_q); |
| LEAVE; |
| } |
| |
| /** |
| * ibmvfc_init_host - Start host initialization |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * nothing |
| **/ |
| static void ibmvfc_init_host(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_target *tgt; |
| |
| if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { |
| if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { |
| dev_err(vhost->dev, |
| "Host initialization retries exceeded. Taking adapter offline\n"); |
| ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
| return; |
| } |
| } |
| |
| if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
| memset(vhost->async_crq.msgs.async, 0, PAGE_SIZE); |
| vhost->async_crq.cur = 0; |
| |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (vhost->client_migrated) |
| tgt->need_login = 1; |
| else |
| ibmvfc_del_tgt(tgt); |
| } |
| |
| scsi_block_requests(vhost->host); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
| vhost->job_step = ibmvfc_npiv_login; |
| wake_up(&vhost->work_wait_q); |
| } |
| } |
| |
| /** |
| * ibmvfc_send_crq - Send a CRQ |
| * @vhost: ibmvfc host struct |
| * @word1: the first 64 bits of the data |
| * @word2: the second 64 bits of the data |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) |
| { |
| struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); |
| } |
| |
| static int ibmvfc_send_sub_crq(struct ibmvfc_host *vhost, u64 cookie, u64 word1, |
| u64 word2, u64 word3, u64 word4) |
| { |
| struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| |
| return plpar_hcall_norets(H_SEND_SUB_CRQ, vdev->unit_address, cookie, |
| word1, word2, word3, word4); |
| } |
| |
| /** |
| * ibmvfc_send_crq_init - Send a CRQ init message |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) |
| { |
| ibmvfc_dbg(vhost, "Sending CRQ init\n"); |
| return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); |
| } |
| |
| /** |
| * ibmvfc_send_crq_init_complete - Send a CRQ init complete message |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) |
| { |
| ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); |
| return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); |
| } |
| |
| /** |
| * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host |
| * @vhost: ibmvfc host who owns the event pool |
| * @queue: ibmvfc queue struct |
| * @size: pool size |
| * |
| * Returns zero on success. |
| **/ |
| static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost, |
| struct ibmvfc_queue *queue, |
| unsigned int size) |
| { |
| int i; |
| struct ibmvfc_event_pool *pool = &queue->evt_pool; |
| |
| ENTER; |
| if (!size) |
| return 0; |
| |
| pool->size = size; |
| pool->events = kcalloc(size, sizeof(*pool->events), GFP_KERNEL); |
| if (!pool->events) |
| return -ENOMEM; |
| |
| pool->iu_storage = dma_alloc_coherent(vhost->dev, |
| size * sizeof(*pool->iu_storage), |
| &pool->iu_token, 0); |
| |
| if (!pool->iu_storage) { |
| kfree(pool->events); |
| return -ENOMEM; |
| } |
| |
| INIT_LIST_HEAD(&queue->sent); |
| INIT_LIST_HEAD(&queue->free); |
| spin_lock_init(&queue->l_lock); |
| |
| for (i = 0; i < size; ++i) { |
| struct ibmvfc_event *evt = &pool->events[i]; |
| |
| /* |
| * evt->active states |
| * 1 = in flight |
| * 0 = being completed |
| * -1 = free/freed |
| */ |
| atomic_set(&evt->active, -1); |
| atomic_set(&evt->free, 1); |
| evt->crq.valid = 0x80; |
| evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); |
| evt->xfer_iu = pool->iu_storage + i; |
| evt->vhost = vhost; |
| evt->queue = queue; |
| evt->ext_list = NULL; |
| list_add_tail(&evt->queue_list, &queue->free); |
| } |
| |
| LEAVE; |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_free_event_pool - Frees memory of the event pool of a host |
| * @vhost: ibmvfc host who owns the event pool |
| * @queue: ibmvfc queue struct |
| * |
| **/ |
| static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost, |
| struct ibmvfc_queue *queue) |
| { |
| int i; |
| struct ibmvfc_event_pool *pool = &queue->evt_pool; |
| |
| ENTER; |
| for (i = 0; i < pool->size; ++i) { |
| list_del(&pool->events[i].queue_list); |
| BUG_ON(atomic_read(&pool->events[i].free) != 1); |
| if (pool->events[i].ext_list) |
| dma_pool_free(vhost->sg_pool, |
| pool->events[i].ext_list, |
| pool->events[i].ext_list_token); |
| } |
| |
| kfree(pool->events); |
| dma_free_coherent(vhost->dev, |
| pool->size * sizeof(*pool->iu_storage), |
| pool->iu_storage, pool->iu_token); |
| LEAVE; |
| } |
| |
| /** |
| * ibmvfc_free_queue - Deallocate queue |
| * @vhost: ibmvfc host struct |
| * @queue: ibmvfc queue struct |
| * |
| * Unmaps dma and deallocates page for messages |
| **/ |
| static void ibmvfc_free_queue(struct ibmvfc_host *vhost, |
| struct ibmvfc_queue *queue) |
| { |
| struct device *dev = vhost->dev; |
| |
| dma_unmap_single(dev, queue->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); |
| free_page((unsigned long)queue->msgs.handle); |
| queue->msgs.handle = NULL; |
| |
| ibmvfc_free_event_pool(vhost, queue); |
| } |
| |
| /** |
| * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ |
| * @vhost: ibmvfc host struct |
| * |
| * Frees irq, deallocates a page for messages, unmaps dma, and unregisters |
| * the crq with the hypervisor. |
| **/ |
| static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) |
| { |
| long rc = 0; |
| struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| struct ibmvfc_queue *crq = &vhost->crq; |
| |
| ibmvfc_dbg(vhost, "Releasing CRQ\n"); |
| free_irq(vdev->irq, vhost); |
| tasklet_kill(&vhost->tasklet); |
| do { |
| if (rc) |
| msleep(100); |
| rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| |
| vhost->state = IBMVFC_NO_CRQ; |
| vhost->logged_in = 0; |
| |
| ibmvfc_free_queue(vhost, crq); |
| } |
| |
| /** |
| * ibmvfc_reenable_crq_queue - reenables the CRQ |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) |
| { |
| int rc = 0; |
| struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| unsigned long flags; |
| |
| ibmvfc_dereg_sub_crqs(vhost); |
| |
| /* Re-enable the CRQ */ |
| do { |
| if (rc) |
| msleep(100); |
| rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); |
| } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| |
| if (rc) |
| dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| spin_lock(vhost->crq.q_lock); |
| vhost->do_enquiry = 1; |
| vhost->using_channels = 0; |
| spin_unlock(vhost->crq.q_lock); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| ibmvfc_reg_sub_crqs(vhost); |
| |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_reset_crq - resets a crq after a failure |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) |
| { |
| int rc = 0; |
| unsigned long flags; |
| struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| struct ibmvfc_queue *crq = &vhost->crq; |
| |
| ibmvfc_dereg_sub_crqs(vhost); |
| |
| /* Close the CRQ */ |
| do { |
| if (rc) |
| msleep(100); |
| rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| spin_lock(vhost->crq.q_lock); |
| vhost->state = IBMVFC_NO_CRQ; |
| vhost->logged_in = 0; |
| vhost->do_enquiry = 1; |
| vhost->using_channels = 0; |
| |
| /* Clean out the queue */ |
| memset(crq->msgs.crq, 0, PAGE_SIZE); |
| crq->cur = 0; |
| |
| /* And re-open it again */ |
| rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, |
| crq->msg_token, PAGE_SIZE); |
| |
| if (rc == H_CLOSED) |
| /* Adapter is good, but other end is not ready */ |
| dev_warn(vhost->dev, "Partner adapter not ready\n"); |
| else if (rc != 0) |
| dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); |
| |
| spin_unlock(vhost->crq.q_lock); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| ibmvfc_reg_sub_crqs(vhost); |
| |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_valid_event - Determines if event is valid. |
| * @pool: event_pool that contains the event |
| * @evt: ibmvfc event to be checked for validity |
| * |
| * Return value: |
| * 1 if event is valid / 0 if event is not valid |
| **/ |
| static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, |
| struct ibmvfc_event *evt) |
| { |
| int index = evt - pool->events; |
| if (index < 0 || index >= pool->size) /* outside of bounds */ |
| return 0; |
| if (evt != pool->events + index) /* unaligned */ |
| return 0; |
| return 1; |
| } |
| |
| /** |
| * ibmvfc_free_event - Free the specified event |
| * @evt: ibmvfc_event to be freed |
| * |
| **/ |
| static void ibmvfc_free_event(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_event_pool *pool = &evt->queue->evt_pool; |
| unsigned long flags; |
| |
| BUG_ON(!ibmvfc_valid_event(pool, evt)); |
| BUG_ON(atomic_inc_return(&evt->free) != 1); |
| BUG_ON(atomic_dec_and_test(&evt->active)); |
| |
| spin_lock_irqsave(&evt->queue->l_lock, flags); |
| list_add_tail(&evt->queue_list, &evt->queue->free); |
| if (evt->eh_comp) |
| complete(evt->eh_comp); |
| spin_unlock_irqrestore(&evt->queue->l_lock, flags); |
| } |
| |
| /** |
| * ibmvfc_scsi_eh_done - EH done function for queuecommand commands |
| * @evt: ibmvfc event struct |
| * |
| * This function does not setup any error status, that must be done |
| * before this function gets called. |
| **/ |
| static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) |
| { |
| struct scsi_cmnd *cmnd = evt->cmnd; |
| |
| if (cmnd) { |
| scsi_dma_unmap(cmnd); |
| cmnd->scsi_done(cmnd); |
| } |
| |
| ibmvfc_free_event(evt); |
| } |
| |
| /** |
| * ibmvfc_complete_purge - Complete failed command list |
| * @purge_list: list head of failed commands |
| * |
| * This function runs completions on commands to fail as a result of a |
| * host reset or platform migration. |
| **/ |
| static void ibmvfc_complete_purge(struct list_head *purge_list) |
| { |
| struct ibmvfc_event *evt, *pos; |
| |
| list_for_each_entry_safe(evt, pos, purge_list, queue_list) { |
| list_del(&evt->queue_list); |
| ibmvfc_trc_end(evt); |
| evt->done(evt); |
| } |
| } |
| |
| /** |
| * ibmvfc_fail_request - Fail request with specified error code |
| * @evt: ibmvfc event struct |
| * @error_code: error code to fail request with |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) |
| { |
| /* |
| * Anything we are failing should still be active. Otherwise, it |
| * implies we already got a response for the command and are doing |
| * something bad like double completing it. |
| */ |
| BUG_ON(!atomic_dec_and_test(&evt->active)); |
| if (evt->cmnd) { |
| evt->cmnd->result = (error_code << 16); |
| evt->done = ibmvfc_scsi_eh_done; |
| } else |
| evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); |
| |
| del_timer(&evt->timer); |
| } |
| |
| /** |
| * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests |
| * @vhost: ibmvfc host struct |
| * @error_code: error code to fail requests with |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) |
| { |
| struct ibmvfc_event *evt, *pos; |
| struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; |
| unsigned long flags; |
| int hwqs = 0; |
| int i; |
| |
| if (vhost->using_channels) |
| hwqs = vhost->scsi_scrqs.active_queues; |
| |
| ibmvfc_dbg(vhost, "Purging all requests\n"); |
| spin_lock_irqsave(&vhost->crq.l_lock, flags); |
| list_for_each_entry_safe(evt, pos, &vhost->crq.sent, queue_list) |
| ibmvfc_fail_request(evt, error_code); |
| list_splice_init(&vhost->crq.sent, &vhost->purge); |
| spin_unlock_irqrestore(&vhost->crq.l_lock, flags); |
| |
| for (i = 0; i < hwqs; i++) { |
| spin_lock_irqsave(queues[i].q_lock, flags); |
| spin_lock(&queues[i].l_lock); |
| list_for_each_entry_safe(evt, pos, &queues[i].sent, queue_list) |
| ibmvfc_fail_request(evt, error_code); |
| list_splice_init(&queues[i].sent, &vhost->purge); |
| spin_unlock(&queues[i].l_lock); |
| spin_unlock_irqrestore(queues[i].q_lock, flags); |
| } |
| } |
| |
| /** |
| * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ |
| * @vhost: struct ibmvfc host to reset |
| **/ |
| static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) |
| { |
| ibmvfc_purge_requests(vhost, DID_ERROR); |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); |
| } |
| |
| /** |
| * __ibmvfc_reset_host - Reset the connection to the server (no locking) |
| * @vhost: struct ibmvfc host to reset |
| **/ |
| static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) |
| { |
| if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && |
| !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
| scsi_block_requests(vhost->host); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); |
| vhost->job_step = ibmvfc_npiv_logout; |
| wake_up(&vhost->work_wait_q); |
| } else |
| ibmvfc_hard_reset_host(vhost); |
| } |
| |
| /** |
| * ibmvfc_reset_host - Reset the connection to the server |
| * @vhost: ibmvfc host struct |
| **/ |
| static void ibmvfc_reset_host(struct ibmvfc_host *vhost) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| __ibmvfc_reset_host(vhost); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| } |
| |
| /** |
| * ibmvfc_retry_host_init - Retry host initialization if allowed |
| * @vhost: ibmvfc host struct |
| * |
| * Returns: 1 if init will be retried / 0 if not |
| * |
| **/ |
| static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) |
| { |
| int retry = 0; |
| |
| if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { |
| vhost->delay_init = 1; |
| if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { |
| dev_err(vhost->dev, |
| "Host initialization retries exceeded. Taking adapter offline\n"); |
| ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
| } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) |
| __ibmvfc_reset_host(vhost); |
| else { |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
| retry = 1; |
| } |
| } |
| |
| wake_up(&vhost->work_wait_q); |
| return retry; |
| } |
| |
| /** |
| * __ibmvfc_get_target - Find the specified scsi_target (no locking) |
| * @starget: scsi target struct |
| * |
| * Return value: |
| * ibmvfc_target struct / NULL if not found |
| **/ |
| static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) |
| { |
| struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| struct ibmvfc_target *tgt; |
| |
| list_for_each_entry(tgt, &vhost->targets, queue) |
| if (tgt->target_id == starget->id) { |
| kref_get(&tgt->kref); |
| return tgt; |
| } |
| return NULL; |
| } |
| |
| /** |
| * ibmvfc_get_target - Find the specified scsi_target |
| * @starget: scsi target struct |
| * |
| * Return value: |
| * ibmvfc_target struct / NULL if not found |
| **/ |
| static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) |
| { |
| struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| struct ibmvfc_target *tgt; |
| unsigned long flags; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| tgt = __ibmvfc_get_target(starget); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return tgt; |
| } |
| |
| /** |
| * ibmvfc_get_host_speed - Get host port speed |
| * @shost: scsi host struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_get_host_speed(struct Scsi_Host *shost) |
| { |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| unsigned long flags; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| if (vhost->state == IBMVFC_ACTIVE) { |
| switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { |
| case 1: |
| fc_host_speed(shost) = FC_PORTSPEED_1GBIT; |
| break; |
| case 2: |
| fc_host_speed(shost) = FC_PORTSPEED_2GBIT; |
| break; |
| case 4: |
| fc_host_speed(shost) = FC_PORTSPEED_4GBIT; |
| break; |
| case 8: |
| fc_host_speed(shost) = FC_PORTSPEED_8GBIT; |
| break; |
| case 10: |
| fc_host_speed(shost) = FC_PORTSPEED_10GBIT; |
| break; |
| case 16: |
| fc_host_speed(shost) = FC_PORTSPEED_16GBIT; |
| break; |
| default: |
| ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", |
| be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); |
| fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; |
| break; |
| } |
| } else |
| fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| } |
| |
| /** |
| * ibmvfc_get_host_port_state - Get host port state |
| * @shost: scsi host struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) |
| { |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| unsigned long flags; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| switch (vhost->state) { |
| case IBMVFC_INITIALIZING: |
| case IBMVFC_ACTIVE: |
| fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; |
| break; |
| case IBMVFC_LINK_DOWN: |
| fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; |
| break; |
| case IBMVFC_LINK_DEAD: |
| case IBMVFC_HOST_OFFLINE: |
| fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; |
| break; |
| case IBMVFC_HALTED: |
| fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; |
| break; |
| case IBMVFC_NO_CRQ: |
| fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; |
| break; |
| default: |
| ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); |
| fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; |
| break; |
| } |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| } |
| |
| /** |
| * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout |
| * @rport: rport struct |
| * @timeout: timeout value |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
| { |
| if (timeout) |
| rport->dev_loss_tmo = timeout; |
| else |
| rport->dev_loss_tmo = 1; |
| } |
| |
| /** |
| * ibmvfc_release_tgt - Free memory allocated for a target |
| * @kref: kref struct |
| * |
| **/ |
| static void ibmvfc_release_tgt(struct kref *kref) |
| { |
| struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); |
| kfree(tgt); |
| } |
| |
| /** |
| * ibmvfc_get_starget_node_name - Get SCSI target's node name |
| * @starget: scsi target struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_get_starget_node_name(struct scsi_target *starget) |
| { |
| struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
| fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; |
| if (tgt) |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } |
| |
| /** |
| * ibmvfc_get_starget_port_name - Get SCSI target's port name |
| * @starget: scsi target struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_get_starget_port_name(struct scsi_target *starget) |
| { |
| struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
| fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; |
| if (tgt) |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } |
| |
| /** |
| * ibmvfc_get_starget_port_id - Get SCSI target's port ID |
| * @starget: scsi target struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_get_starget_port_id(struct scsi_target *starget) |
| { |
| struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
| fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; |
| if (tgt) |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } |
| |
| /** |
| * ibmvfc_wait_while_resetting - Wait while the host resets |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) |
| { |
| long timeout = wait_event_timeout(vhost->init_wait_q, |
| ((vhost->state == IBMVFC_ACTIVE || |
| vhost->state == IBMVFC_HOST_OFFLINE || |
| vhost->state == IBMVFC_LINK_DEAD) && |
| vhost->action == IBMVFC_HOST_ACTION_NONE), |
| (init_timeout * HZ)); |
| |
| return timeout ? 0 : -EIO; |
| } |
| |
| /** |
| * ibmvfc_issue_fc_host_lip - Re-initiate link initialization |
| * @shost: scsi host struct |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) |
| { |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| |
| dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); |
| ibmvfc_reset_host(vhost); |
| return ibmvfc_wait_while_resetting(vhost); |
| } |
| |
| /** |
| * ibmvfc_gather_partition_info - Gather info about the LPAR |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) |
| { |
| struct device_node *rootdn; |
| const char *name; |
| const unsigned int *num; |
| |
| rootdn = of_find_node_by_path("/"); |
| if (!rootdn) |
| return; |
| |
| name = of_get_property(rootdn, "ibm,partition-name", NULL); |
| if (name) |
| strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); |
| num = of_get_property(rootdn, "ibm,partition-no", NULL); |
| if (num) |
| vhost->partition_number = *num; |
| of_node_put(rootdn); |
| } |
| |
| /** |
| * ibmvfc_set_login_info - Setup info for NPIV login |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_npiv_login *login_info = &vhost->login_info; |
| struct ibmvfc_queue *async_crq = &vhost->async_crq; |
| struct device_node *of_node = vhost->dev->of_node; |
| const char *location; |
| |
| memset(login_info, 0, sizeof(*login_info)); |
| |
| login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); |
| login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); |
| login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); |
| login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); |
| login_info->partition_num = cpu_to_be32(vhost->partition_number); |
| login_info->vfc_frame_version = cpu_to_be32(1); |
| login_info->fcp_version = cpu_to_be16(3); |
| login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); |
| if (vhost->client_migrated) |
| login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); |
| |
| login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ); |
| login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE | IBMVFC_CAN_SEND_VF_WWPN); |
| |
| if (vhost->mq_enabled || vhost->using_channels) |
| login_info->capabilities |= cpu_to_be64(IBMVFC_CAN_USE_CHANNELS); |
| |
| login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); |
| login_info->async.len = cpu_to_be32(async_crq->size * |
| sizeof(*async_crq->msgs.async)); |
| strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); |
| strncpy(login_info->device_name, |
| dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); |
| |
| location = of_get_property(of_node, "ibm,loc-code", NULL); |
| location = location ? location : dev_name(vhost->dev); |
| strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); |
| } |
| |
| /** |
| * ibmvfc_get_event - Gets the next free event in pool |
| * @queue: ibmvfc queue struct |
| * |
| * Returns a free event from the pool. |
| **/ |
| static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_queue *queue) |
| { |
| struct ibmvfc_event *evt; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&queue->l_lock, flags); |
| if (list_empty(&queue->free)) { |
| ibmvfc_log(queue->vhost, 4, "empty event pool on queue:%ld\n", queue->hwq_id); |
| spin_unlock_irqrestore(&queue->l_lock, flags); |
| return NULL; |
| } |
| evt = list_entry(queue->free.next, struct ibmvfc_event, queue_list); |
| atomic_set(&evt->free, 0); |
| list_del(&evt->queue_list); |
| spin_unlock_irqrestore(&queue->l_lock, flags); |
| return evt; |
| } |
| |
| /** |
| * ibmvfc_locked_done - Calls evt completion with host_lock held |
| * @evt: ibmvfc evt to complete |
| * |
| * All non-scsi command completion callbacks have the expectation that the |
| * host_lock is held. This callback is used by ibmvfc_init_event to wrap a |
| * MAD evt with the host_lock. |
| **/ |
| static void ibmvfc_locked_done(struct ibmvfc_event *evt) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(evt->vhost->host->host_lock, flags); |
| evt->_done(evt); |
| spin_unlock_irqrestore(evt->vhost->host->host_lock, flags); |
| } |
| |
| /** |
| * ibmvfc_init_event - Initialize fields in an event struct that are always |
| * required. |
| * @evt: The event |
| * @done: Routine to call when the event is responded to |
| * @format: SRP or MAD format |
| **/ |
| static void ibmvfc_init_event(struct ibmvfc_event *evt, |
| void (*done) (struct ibmvfc_event *), u8 format) |
| { |
| evt->cmnd = NULL; |
| evt->sync_iu = NULL; |
| evt->eh_comp = NULL; |
| evt->crq.format = format; |
| if (format == IBMVFC_CMD_FORMAT) |
| evt->done = done; |
| else { |
| evt->_done = done; |
| evt->done = ibmvfc_locked_done; |
| } |
| evt->hwq = 0; |
| } |
| |
| /** |
| * ibmvfc_map_sg_list - Initialize scatterlist |
| * @scmd: scsi command struct |
| * @nseg: number of scatterlist segments |
| * @md: memory descriptor list to initialize |
| **/ |
| static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, |
| struct srp_direct_buf *md) |
| { |
| int i; |
| struct scatterlist *sg; |
| |
| scsi_for_each_sg(scmd, sg, nseg, i) { |
| md[i].va = cpu_to_be64(sg_dma_address(sg)); |
| md[i].len = cpu_to_be32(sg_dma_len(sg)); |
| md[i].key = 0; |
| } |
| } |
| |
| /** |
| * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes descriptor fields |
| * @scmd: struct scsi_cmnd with the scatterlist |
| * @evt: ibmvfc event struct |
| * @vfc_cmd: vfc_cmd that contains the memory descriptor |
| * @dev: device for which to map dma memory |
| * |
| * Returns: |
| * 0 on success / non-zero on failure |
| **/ |
| static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, |
| struct ibmvfc_event *evt, |
| struct ibmvfc_cmd *vfc_cmd, struct device *dev) |
| { |
| |
| int sg_mapped; |
| struct srp_direct_buf *data = &vfc_cmd->ioba; |
| struct ibmvfc_host *vhost = dev_get_drvdata(dev); |
| struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(evt->vhost, vfc_cmd); |
| |
| if (cls3_error) |
| vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR); |
| |
| sg_mapped = scsi_dma_map(scmd); |
| if (!sg_mapped) { |
| vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); |
| return 0; |
| } else if (unlikely(sg_mapped < 0)) { |
| if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); |
| return sg_mapped; |
| } |
| |
| if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
| vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); |
| iu->add_cdb_len |= IBMVFC_WRDATA; |
| } else { |
| vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); |
| iu->add_cdb_len |= IBMVFC_RDDATA; |
| } |
| |
| if (sg_mapped == 1) { |
| ibmvfc_map_sg_list(scmd, sg_mapped, data); |
| return 0; |
| } |
| |
| vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); |
| |
| if (!evt->ext_list) { |
| evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, |
| &evt->ext_list_token); |
| |
| if (!evt->ext_list) { |
| scsi_dma_unmap(scmd); |
| if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); |
| return -ENOMEM; |
| } |
| } |
| |
| ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); |
| |
| data->va = cpu_to_be64(evt->ext_list_token); |
| data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); |
| data->key = 0; |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_timeout - Internal command timeout handler |
| * @t: struct ibmvfc_event that timed out |
| * |
| * Called when an internally generated command times out |
| **/ |
| static void ibmvfc_timeout(struct timer_list *t) |
| { |
| struct ibmvfc_event *evt = from_timer(evt, t, timer); |
| struct ibmvfc_host *vhost = evt->vhost; |
| dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); |
| ibmvfc_reset_host(vhost); |
| } |
| |
| /** |
| * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() |
| * @evt: event to be sent |
| * @vhost: ibmvfc host struct |
| * @timeout: timeout in seconds - 0 means do not time command |
| * |
| * Returns the value returned from ibmvfc_send_crq(). (Zero for success) |
| **/ |
| static int ibmvfc_send_event(struct ibmvfc_event *evt, |
| struct ibmvfc_host *vhost, unsigned long timeout) |
| { |
| __be64 *crq_as_u64 = (__be64 *) &evt->crq; |
| unsigned long flags; |
| int rc; |
| |
| /* Copy the IU into the transfer area */ |
| *evt->xfer_iu = evt->iu; |
| if (evt->crq.format == IBMVFC_CMD_FORMAT) |
| evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); |
| else if (evt->crq.format == IBMVFC_MAD_FORMAT) |
| evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); |
| else |
| BUG(); |
| |
| timer_setup(&evt->timer, ibmvfc_timeout, 0); |
| |
| if (timeout) { |
| evt->timer.expires = jiffies + (timeout * HZ); |
| add_timer(&evt->timer); |
| } |
| |
| spin_lock_irqsave(&evt->queue->l_lock, flags); |
| list_add_tail(&evt->queue_list, &evt->queue->sent); |
| atomic_set(&evt->active, 1); |
| |
| mb(); |
| |
| if (evt->queue->fmt == IBMVFC_SUB_CRQ_FMT) |
| rc = ibmvfc_send_sub_crq(vhost, |
| evt->queue->vios_cookie, |
| be64_to_cpu(crq_as_u64[0]), |
| be64_to_cpu(crq_as_u64[1]), |
| 0, 0); |
| else |
| rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), |
| be64_to_cpu(crq_as_u64[1])); |
| |
| if (rc) { |
| atomic_set(&evt->active, 0); |
| list_del(&evt->queue_list); |
| spin_unlock_irqrestore(&evt->queue->l_lock, flags); |
| del_timer(&evt->timer); |
| |
| /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. |
| * Firmware will send a CRQ with a transport event (0xFF) to |
| * tell this client what has happened to the transport. This |
| * will be handled in ibmvfc_handle_crq() |
| */ |
| if (rc == H_CLOSED) { |
| if (printk_ratelimit()) |
| dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); |
| if (evt->cmnd) |
| scsi_dma_unmap(evt->cmnd); |
| ibmvfc_free_event(evt); |
| return SCSI_MLQUEUE_HOST_BUSY; |
| } |
| |
| dev_err(vhost->dev, "Send error (rc=%d)\n", rc); |
| if (evt->cmnd) { |
| evt->cmnd->result = DID_ERROR << 16; |
| evt->done = ibmvfc_scsi_eh_done; |
| } else |
| evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); |
| |
| evt->done(evt); |
| } else { |
| spin_unlock_irqrestore(&evt->queue->l_lock, flags); |
| ibmvfc_trc_start(evt); |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_log_error - Log an error for the failed command if appropriate |
| * @evt: ibmvfc event to log |
| * |
| **/ |
| static void ibmvfc_log_error(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); |
| struct scsi_cmnd *cmnd = evt->cmnd; |
| const char *err = unknown_error; |
| int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); |
| int logerr = 0; |
| int rsp_code = 0; |
| |
| if (index >= 0) { |
| logerr = cmd_status[index].log; |
| err = cmd_status[index].name; |
| } |
| |
| if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) |
| return; |
| |
| if (rsp->flags & FCP_RSP_LEN_VALID) |
| rsp_code = rsp->data.info.rsp_code; |
| |
| scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) " |
| "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", |
| cmnd->cmnd[0], err, be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error), |
| rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); |
| } |
| |
| /** |
| * ibmvfc_relogin - Log back into the specified device |
| * @sdev: scsi device struct |
| * |
| **/ |
| static void ibmvfc_relogin(struct scsi_device *sdev) |
| { |
| struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| struct ibmvfc_target *tgt; |
| unsigned long flags; |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (rport == tgt->rport) { |
| ibmvfc_del_tgt(tgt); |
| break; |
| } |
| } |
| |
| ibmvfc_reinit_host(vhost); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| } |
| |
| /** |
| * ibmvfc_scsi_done - Handle responses from commands |
| * @evt: ibmvfc event to be handled |
| * |
| * Used as a callback when sending scsi cmds. |
| **/ |
| static void ibmvfc_scsi_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; |
| struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(evt->vhost, vfc_cmd); |
| struct scsi_cmnd *cmnd = evt->cmnd; |
| u32 rsp_len = 0; |
| u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); |
| |
| if (cmnd) { |
| if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) |
| scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); |
| else if (rsp->flags & FCP_RESID_UNDER) |
| scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); |
| else |
| scsi_set_resid(cmnd, 0); |
| |
| if (vfc_cmd->status) { |
| cmnd->result = ibmvfc_get_err_result(evt->vhost, vfc_cmd); |
| |
| if (rsp->flags & FCP_RSP_LEN_VALID) |
| rsp_len = be32_to_cpu(rsp->fcp_rsp_len); |
| if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) |
| sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; |
| if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) |
| memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); |
| if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && |
| (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) |
| ibmvfc_relogin(cmnd->device); |
| |
| if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) |
| cmnd->result = (DID_ERROR << 16); |
| |
| ibmvfc_log_error(evt); |
| } |
| |
| if (!cmnd->result && |
| (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) |
| cmnd->result = (DID_ERROR << 16); |
| |
| scsi_dma_unmap(cmnd); |
| cmnd->scsi_done(cmnd); |
| } |
| |
| ibmvfc_free_event(evt); |
| } |
| |
| /** |
| * ibmvfc_host_chkready - Check if the host can accept commands |
| * @vhost: struct ibmvfc host |
| * |
| * Returns: |
| * 1 if host can accept command / 0 if not |
| **/ |
| static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) |
| { |
| int result = 0; |
| |
| switch (vhost->state) { |
| case IBMVFC_LINK_DEAD: |
| case IBMVFC_HOST_OFFLINE: |
| result = DID_NO_CONNECT << 16; |
| break; |
| case IBMVFC_NO_CRQ: |
| case IBMVFC_INITIALIZING: |
| case IBMVFC_HALTED: |
| case IBMVFC_LINK_DOWN: |
| result = DID_REQUEUE << 16; |
| break; |
| case IBMVFC_ACTIVE: |
| result = 0; |
| break; |
| } |
| |
| return result; |
| } |
| |
| static struct ibmvfc_cmd *ibmvfc_init_vfc_cmd(struct ibmvfc_event *evt, struct scsi_device *sdev) |
| { |
| struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; |
| struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); |
| struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); |
| size_t offset; |
| |
| memset(vfc_cmd, 0, sizeof(*vfc_cmd)); |
| if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { |
| offset = offsetof(struct ibmvfc_cmd, v2.rsp); |
| vfc_cmd->target_wwpn = cpu_to_be64(rport->port_name); |
| } else |
| offset = offsetof(struct ibmvfc_cmd, v1.rsp); |
| vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offset); |
| vfc_cmd->resp.len = cpu_to_be32(sizeof(*rsp)); |
| vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); |
| vfc_cmd->payload_len = cpu_to_be32(sizeof(*iu)); |
| vfc_cmd->resp_len = cpu_to_be32(sizeof(*rsp)); |
| vfc_cmd->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); |
| vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); |
| int_to_scsilun(sdev->lun, &iu->lun); |
| |
| return vfc_cmd; |
| } |
| |
| /** |
| * ibmvfc_queuecommand - The queuecommand function of the scsi template |
| * @shost: scsi host struct |
| * @cmnd: struct scsi_cmnd to be executed |
| * |
| * Returns: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) |
| { |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); |
| struct ibmvfc_cmd *vfc_cmd; |
| struct ibmvfc_fcp_cmd_iu *iu; |
| struct ibmvfc_event *evt; |
| u32 tag_and_hwq = blk_mq_unique_tag(scsi_cmd_to_rq(cmnd)); |
| u16 hwq = blk_mq_unique_tag_to_hwq(tag_and_hwq); |
| u16 scsi_channel; |
| int rc; |
| |
| if (unlikely((rc = fc_remote_port_chkready(rport))) || |
| unlikely((rc = ibmvfc_host_chkready(vhost)))) { |
| cmnd->result = rc; |
| cmnd->scsi_done(cmnd); |
| return 0; |
| } |
| |
| cmnd->result = (DID_OK << 16); |
| if (vhost->using_channels) { |
| scsi_channel = hwq % vhost->scsi_scrqs.active_queues; |
| evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[scsi_channel]); |
| if (!evt) |
| return SCSI_MLQUEUE_HOST_BUSY; |
| |
| evt->hwq = hwq % vhost->scsi_scrqs.active_queues; |
| } else { |
| evt = ibmvfc_get_event(&vhost->crq); |
| if (!evt) |
| return SCSI_MLQUEUE_HOST_BUSY; |
| } |
| |
| ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); |
| evt->cmnd = cmnd; |
| |
| vfc_cmd = ibmvfc_init_vfc_cmd(evt, cmnd->device); |
| iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); |
| |
| iu->xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); |
| memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); |
| |
| if (cmnd->flags & SCMD_TAGGED) { |
| vfc_cmd->task_tag = cpu_to_be64(scsi_cmd_to_rq(cmnd)->tag); |
| iu->pri_task_attr = IBMVFC_SIMPLE_TASK; |
| } |
| |
| vfc_cmd->correlation = cpu_to_be64((u64)evt); |
| |
| if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) |
| return ibmvfc_send_event(evt, vhost, 0); |
| |
| ibmvfc_free_event(evt); |
| if (rc == -ENOMEM) |
| return SCSI_MLQUEUE_HOST_BUSY; |
| |
| if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| scmd_printk(KERN_ERR, cmnd, |
| "Failed to map DMA buffer for command. rc=%d\n", rc); |
| |
| cmnd->result = DID_ERROR << 16; |
| cmnd->scsi_done(cmnd); |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_sync_completion - Signal that a synchronous command has completed |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_sync_completion(struct ibmvfc_event *evt) |
| { |
| /* copy the response back */ |
| if (evt->sync_iu) |
| *evt->sync_iu = *evt->xfer_iu; |
| |
| complete(&evt->comp); |
| } |
| |
| /** |
| * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands |
| * @evt: struct ibmvfc_event |
| * |
| **/ |
| static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_host *vhost = evt->vhost; |
| |
| ibmvfc_free_event(evt); |
| vhost->aborting_passthru = 0; |
| dev_info(vhost->dev, "Passthru command cancelled\n"); |
| } |
| |
| /** |
| * ibmvfc_bsg_timeout - Handle a BSG timeout |
| * @job: struct bsg_job that timed out |
| * |
| * Returns: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_bsg_timeout(struct bsg_job *job) |
| { |
| struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); |
| unsigned long port_id = (unsigned long)job->dd_data; |
| struct ibmvfc_event *evt; |
| struct ibmvfc_tmf *tmf; |
| unsigned long flags; |
| int rc; |
| |
| ENTER; |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { |
| __ibmvfc_reset_host(vhost); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return 0; |
| } |
| |
| vhost->aborting_passthru = 1; |
| evt = ibmvfc_get_event(&vhost->crq); |
| if (!evt) { |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return -ENOMEM; |
| } |
| |
| ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); |
| |
| tmf = &evt->iu.tmf; |
| memset(tmf, 0, sizeof(*tmf)); |
| tmf->common.version = cpu_to_be32(1); |
| tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); |
| tmf->common.length = cpu_to_be16(sizeof(*tmf)); |
| tmf->scsi_id = cpu_to_be64(port_id); |
| tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); |
| tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); |
| rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| |
| if (rc != 0) { |
| vhost->aborting_passthru = 0; |
| dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); |
| rc = -EIO; |
| } else |
| dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", |
| port_id); |
| |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| LEAVE; |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command |
| * @vhost: struct ibmvfc_host to send command |
| * @port_id: port ID to send command |
| * |
| * Returns: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) |
| { |
| struct ibmvfc_port_login *plogi; |
| struct ibmvfc_target *tgt; |
| struct ibmvfc_event *evt; |
| union ibmvfc_iu rsp_iu; |
| unsigned long flags; |
| int rc = 0, issue_login = 1; |
| |
| ENTER; |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->scsi_id == port_id) { |
| issue_login = 0; |
| break; |
| } |
| } |
| |
| if (!issue_login) |
| goto unlock_out; |
| if (unlikely((rc = ibmvfc_host_chkready(vhost)))) |
| goto unlock_out; |
| |
| evt = ibmvfc_get_event(&vhost->crq); |
| if (!evt) { |
| rc = -ENOMEM; |
| goto unlock_out; |
| } |
| ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); |
| plogi = &evt->iu.plogi; |
| memset(plogi, 0, sizeof(*plogi)); |
| plogi->common.version = cpu_to_be32(1); |
| plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); |
| plogi->common.length = cpu_to_be16(sizeof(*plogi)); |
| plogi->scsi_id = cpu_to_be64(port_id); |
| evt->sync_iu = &rsp_iu; |
| init_completion(&evt->comp); |
| |
| rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| if (rc) |
| return -EIO; |
| |
| wait_for_completion(&evt->comp); |
| |
| if (rsp_iu.plogi.common.status) |
| rc = -EIO; |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| ibmvfc_free_event(evt); |
| unlock_out: |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| LEAVE; |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_bsg_request - Handle a BSG request |
| * @job: struct bsg_job to be executed |
| * |
| * Returns: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_bsg_request(struct bsg_job *job) |
| { |
| struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); |
| struct fc_rport *rport = fc_bsg_to_rport(job); |
| struct ibmvfc_passthru_mad *mad; |
| struct ibmvfc_event *evt; |
| union ibmvfc_iu rsp_iu; |
| unsigned long flags, port_id = -1; |
| struct fc_bsg_request *bsg_request = job->request; |
| struct fc_bsg_reply *bsg_reply = job->reply; |
| unsigned int code = bsg_request->msgcode; |
| int rc = 0, req_seg, rsp_seg, issue_login = 0; |
| u32 fc_flags, rsp_len; |
| |
| ENTER; |
| bsg_reply->reply_payload_rcv_len = 0; |
| if (rport) |
| port_id = rport->port_id; |
| |
| switch (code) { |
| case FC_BSG_HST_ELS_NOLOGIN: |
| port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) | |
| (bsg_request->rqst_data.h_els.port_id[1] << 8) | |
| bsg_request->rqst_data.h_els.port_id[2]; |
| fallthrough; |
| case FC_BSG_RPT_ELS: |
| fc_flags = IBMVFC_FC_ELS; |
| break; |
| case FC_BSG_HST_CT: |
| issue_login = 1; |
| port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) | |
| (bsg_request->rqst_data.h_ct.port_id[1] << 8) | |
| bsg_request->rqst_data.h_ct.port_id[2]; |
| fallthrough; |
| case FC_BSG_RPT_CT: |
| fc_flags = IBMVFC_FC_CT_IU; |
| break; |
| default: |
| return -ENOTSUPP; |
| } |
| |
| if (port_id == -1) |
| return -EINVAL; |
| if (!mutex_trylock(&vhost->passthru_mutex)) |
| return -EBUSY; |
| |
| job->dd_data = (void *)port_id; |
| req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, |
| job->request_payload.sg_cnt, DMA_TO_DEVICE); |
| |
| if (!req_seg) { |
| mutex_unlock(&vhost->passthru_mutex); |
| return -ENOMEM; |
| } |
| |
| rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, |
| job->reply_payload.sg_cnt, DMA_FROM_DEVICE); |
| |
| if (!rsp_seg) { |
| dma_unmap_sg(vhost->dev, job->request_payload.sg_list, |
| job->request_payload.sg_cnt, DMA_TO_DEVICE); |
| mutex_unlock(&vhost->passthru_mutex); |
| return -ENOMEM; |
| } |
| |
| if (req_seg > 1 || rsp_seg > 1) { |
| rc = -EINVAL; |
| goto out; |
| } |
| |
| if (issue_login) |
| rc = ibmvfc_bsg_plogi(vhost, port_id); |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| |
| if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || |
| unlikely((rc = ibmvfc_host_chkready(vhost)))) { |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| goto out; |
| } |
| |
| evt = ibmvfc_get_event(&vhost->crq); |
| if (!evt) { |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| rc = -ENOMEM; |
| goto out; |
| } |
| ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); |
| mad = &evt->iu.passthru; |
| |
| memset(mad, 0, sizeof(*mad)); |
| mad->common.version = cpu_to_be32(1); |
| mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); |
| mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); |
| |
| mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + |
| offsetof(struct ibmvfc_passthru_mad, iu)); |
| mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); |
| |
| mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); |
| mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); |
| mad->iu.flags = cpu_to_be32(fc_flags); |
| mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); |
| |
| mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); |
| mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); |
| mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); |
| mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); |
| mad->iu.scsi_id = cpu_to_be64(port_id); |
| mad->iu.tag = cpu_to_be64((u64)evt); |
| rsp_len = be32_to_cpu(mad->iu.rsp.len); |
| |
| evt->sync_iu = &rsp_iu; |
| init_completion(&evt->comp); |
| rc = ibmvfc_send_event(evt, vhost, 0); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| if (rc) { |
| rc = -EIO; |
| goto out; |
| } |
| |
| wait_for_completion(&evt->comp); |
| |
| if (rsp_iu.passthru.common.status) |
| rc = -EIO; |
| else |
| bsg_reply->reply_payload_rcv_len = rsp_len; |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| ibmvfc_free_event(evt); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| bsg_reply->result = rc; |
| bsg_job_done(job, bsg_reply->result, |
| bsg_reply->reply_payload_rcv_len); |
| rc = 0; |
| out: |
| dma_unmap_sg(vhost->dev, job->request_payload.sg_list, |
| job->request_payload.sg_cnt, DMA_TO_DEVICE); |
| dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, |
| job->reply_payload.sg_cnt, DMA_FROM_DEVICE); |
| mutex_unlock(&vhost->passthru_mutex); |
| LEAVE; |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_reset_device - Reset the device with the specified reset type |
| * @sdev: scsi device to reset |
| * @type: reset type |
| * @desc: reset type description for log messages |
| * |
| * Returns: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) |
| { |
| struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| struct ibmvfc_cmd *tmf; |
| struct ibmvfc_event *evt = NULL; |
| union ibmvfc_iu rsp_iu; |
| struct ibmvfc_fcp_cmd_iu *iu; |
| struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); |
| int rsp_rc = -EBUSY; |
| unsigned long flags; |
| int rsp_code = 0; |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| if (vhost->state == IBMVFC_ACTIVE) { |
| if (vhost->using_channels) |
| evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[0]); |
| else |
| evt = ibmvfc_get_event(&vhost->crq); |
| |
| if (!evt) { |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return -ENOMEM; |
| } |
| |
| ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); |
| tmf = ibmvfc_init_vfc_cmd(evt, sdev); |
| iu = ibmvfc_get_fcp_iu(vhost, tmf); |
| |
| tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); |
| if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) |
| tmf->target_wwpn = cpu_to_be64(rport->port_name); |
| iu->tmf_flags = type; |
| evt->sync_iu = &rsp_iu; |
| |
| init_completion(&evt->comp); |
| rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| } |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| if (rsp_rc != 0) { |
| sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", |
| desc, rsp_rc); |
| return -EIO; |
| } |
| |
| sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); |
| wait_for_completion(&evt->comp); |
| |
| if (rsp_iu.cmd.status) |
| rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); |
| |
| if (rsp_code) { |
| if (fc_rsp->flags & FCP_RSP_LEN_VALID) |
| rsp_code = fc_rsp->data.info.rsp_code; |
| |
| sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " |
| "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, |
| ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), |
| be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, |
| fc_rsp->scsi_status); |
| rsp_rc = -EIO; |
| } else |
| sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| ibmvfc_free_event(evt); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return rsp_rc; |
| } |
| |
| /** |
| * ibmvfc_match_rport - Match function for specified remote port |
| * @evt: ibmvfc event struct |
| * @rport: device to match |
| * |
| * Returns: |
| * 1 if event matches rport / 0 if event does not match rport |
| **/ |
| static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) |
| { |
| struct fc_rport *cmd_rport; |
| |
| if (evt->cmnd) { |
| cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); |
| if (cmd_rport == rport) |
| return 1; |
| } |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_match_target - Match function for specified target |
| * @evt: ibmvfc event struct |
| * @device: device to match (starget) |
| * |
| * Returns: |
| * 1 if event matches starget / 0 if event does not match starget |
| **/ |
| static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) |
| { |
| if (evt->cmnd && scsi_target(evt->cmnd->device) == device) |
| return 1; |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_match_lun - Match function for specified LUN |
| * @evt: ibmvfc event struct |
| * @device: device to match (sdev) |
| * |
| * Returns: |
| * 1 if event matches sdev / 0 if event does not match sdev |
| **/ |
| static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) |
| { |
| if (evt->cmnd && evt->cmnd->device == device) |
| return 1; |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_event_is_free - Check if event is free or not |
| * @evt: ibmvfc event struct |
| * |
| * Returns: |
| * true / false |
| **/ |
| static bool ibmvfc_event_is_free(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_event *loop_evt; |
| |
| list_for_each_entry(loop_evt, &evt->queue->free, queue_list) |
| if (loop_evt == evt) |
| return true; |
| |
| return false; |
| } |
| |
| /** |
| * ibmvfc_wait_for_ops - Wait for ops to complete |
| * @vhost: ibmvfc host struct |
| * @device: device to match (starget or sdev) |
| * @match: match function |
| * |
| * Returns: |
| * SUCCESS / FAILED |
| **/ |
| static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, |
| int (*match) (struct ibmvfc_event *, void *)) |
| { |
| struct ibmvfc_event *evt; |
| DECLARE_COMPLETION_ONSTACK(comp); |
| int wait, i, q_index, q_size; |
| unsigned long flags; |
| signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; |
| struct ibmvfc_queue *queues; |
| |
| ENTER; |
| if (vhost->mq_enabled && vhost->using_channels) { |
| queues = vhost->scsi_scrqs.scrqs; |
| q_size = vhost->scsi_scrqs.active_queues; |
| } else { |
| queues = &vhost->crq; |
| q_size = 1; |
| } |
| |
| do { |
| wait = 0; |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| for (q_index = 0; q_index < q_size; q_index++) { |
| spin_lock(&queues[q_index].l_lock); |
| for (i = 0; i < queues[q_index].evt_pool.size; i++) { |
| evt = &queues[q_index].evt_pool.events[i]; |
| if (!ibmvfc_event_is_free(evt)) { |
| if (match(evt, device)) { |
| evt->eh_comp = ∁ |
| wait++; |
| } |
| } |
| } |
| spin_unlock(&queues[q_index].l_lock); |
| } |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| if (wait) { |
| timeout = wait_for_completion_timeout(&comp, timeout); |
| |
| if (!timeout) { |
| wait = 0; |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| for (q_index = 0; q_index < q_size; q_index++) { |
| spin_lock(&queues[q_index].l_lock); |
| for (i = 0; i < queues[q_index].evt_pool.size; i++) { |
| evt = &queues[q_index].evt_pool.events[i]; |
| if (!ibmvfc_event_is_free(evt)) { |
| if (match(evt, device)) { |
| evt->eh_comp = NULL; |
| wait++; |
| } |
| } |
| } |
| spin_unlock(&queues[q_index].l_lock); |
| } |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| if (wait) |
| dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); |
| LEAVE; |
| return wait ? FAILED : SUCCESS; |
| } |
| } |
| } while (wait); |
| |
| LEAVE; |
| return SUCCESS; |
| } |
| |
| static struct ibmvfc_event *ibmvfc_init_tmf(struct ibmvfc_queue *queue, |
| struct scsi_device *sdev, |
| int type) |
| { |
| struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| struct scsi_target *starget = scsi_target(sdev); |
| struct fc_rport *rport = starget_to_rport(starget); |
| struct ibmvfc_event *evt; |
| struct ibmvfc_tmf *tmf; |
| |
| evt = ibmvfc_get_event(queue); |
| if (!evt) |
| return NULL; |
| ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); |
| |
| tmf = &evt->iu.tmf; |
| memset(tmf, 0, sizeof(*tmf)); |
| if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { |
| tmf->common.version = cpu_to_be32(2); |
| tmf->target_wwpn = cpu_to_be64(rport->port_name); |
| } else { |
| tmf->common.version = cpu_to_be32(1); |
| } |
| tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); |
| tmf->common.length = cpu_to_be16(sizeof(*tmf)); |
| tmf->scsi_id = cpu_to_be64(rport->port_id); |
| int_to_scsilun(sdev->lun, &tmf->lun); |
| if (!ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPRESS_ABTS)) |
| type &= ~IBMVFC_TMF_SUPPRESS_ABTS; |
| if (vhost->state == IBMVFC_ACTIVE) |
| tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); |
| else |
| tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); |
| tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); |
| tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); |
| |
| init_completion(&evt->comp); |
| |
| return evt; |
| } |
| |
| static int ibmvfc_cancel_all_mq(struct scsi_device *sdev, int type) |
| { |
| struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| struct ibmvfc_event *evt, *found_evt, *temp; |
| struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; |
| unsigned long flags; |
| int num_hwq, i; |
| int fail = 0; |
| LIST_HEAD(cancelq); |
| u16 status; |
| |
| ENTER; |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| num_hwq = vhost->scsi_scrqs.active_queues; |
| for (i = 0; i < num_hwq; i++) { |
| spin_lock(queues[i].q_lock); |
| spin_lock(&queues[i].l_lock); |
| found_evt = NULL; |
| list_for_each_entry(evt, &queues[i].sent, queue_list) { |
| if (evt->cmnd && evt->cmnd->device == sdev) { |
| found_evt = evt; |
| break; |
| } |
| } |
| spin_unlock(&queues[i].l_lock); |
| |
| if (found_evt && vhost->logged_in) { |
| evt = ibmvfc_init_tmf(&queues[i], sdev, type); |
| if (!evt) { |
| spin_unlock(queues[i].q_lock); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return -ENOMEM; |
| } |
| evt->sync_iu = &queues[i].cancel_rsp; |
| ibmvfc_send_event(evt, vhost, default_timeout); |
| list_add_tail(&evt->cancel, &cancelq); |
| } |
| |
| spin_unlock(queues[i].q_lock); |
| } |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| if (list_empty(&cancelq)) { |
| if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); |
| return 0; |
| } |
| |
| sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); |
| |
| list_for_each_entry_safe(evt, temp, &cancelq, cancel) { |
| wait_for_completion(&evt->comp); |
| status = be16_to_cpu(evt->queue->cancel_rsp.mad_common.status); |
| list_del(&evt->cancel); |
| ibmvfc_free_event(evt); |
| |
| if (status != IBMVFC_MAD_SUCCESS) { |
| sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); |
| switch (status) { |
| case IBMVFC_MAD_DRIVER_FAILED: |
| case IBMVFC_MAD_CRQ_ERROR: |
| /* Host adapter most likely going through reset, return success to |
| * the caller will wait for the command being cancelled to get returned |
| */ |
| break; |
| default: |
| fail = 1; |
| break; |
| } |
| } |
| } |
| |
| if (fail) |
| return -EIO; |
| |
| sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); |
| LEAVE; |
| return 0; |
| } |
| |
| static int ibmvfc_cancel_all_sq(struct scsi_device *sdev, int type) |
| { |
| struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| struct ibmvfc_event *evt, *found_evt; |
| union ibmvfc_iu rsp; |
| int rsp_rc = -EBUSY; |
| unsigned long flags; |
| u16 status; |
| |
| ENTER; |
| found_evt = NULL; |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| spin_lock(&vhost->crq.l_lock); |
| list_for_each_entry(evt, &vhost->crq.sent, queue_list) { |
| if (evt->cmnd && evt->cmnd->device == sdev) { |
| found_evt = evt; |
| break; |
| } |
| } |
| spin_unlock(&vhost->crq.l_lock); |
| |
| if (!found_evt) { |
| if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return 0; |
| } |
| |
| if (vhost->logged_in) { |
| evt = ibmvfc_init_tmf(&vhost->crq, sdev, type); |
| evt->sync_iu = &rsp; |
| rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| } |
| |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| if (rsp_rc != 0) { |
| sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); |
| /* If failure is received, the host adapter is most likely going |
| through reset, return success so the caller will wait for the command |
| being cancelled to get returned */ |
| return 0; |
| } |
| |
| sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); |
| |
| wait_for_completion(&evt->comp); |
| status = be16_to_cpu(rsp.mad_common.status); |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| ibmvfc_free_event(evt); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| if (status != IBMVFC_MAD_SUCCESS) { |
| sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); |
| switch (status) { |
| case IBMVFC_MAD_DRIVER_FAILED: |
| case IBMVFC_MAD_CRQ_ERROR: |
| /* Host adapter most likely going through reset, return success to |
| the caller will wait for the command being cancelled to get returned */ |
| return 0; |
| default: |
| return -EIO; |
| }; |
| } |
| |
| sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_cancel_all - Cancel all outstanding commands to the device |
| * @sdev: scsi device to cancel commands |
| * @type: type of error recovery being performed |
| * |
| * This sends a cancel to the VIOS for the specified device. This does |
| * NOT send any abort to the actual device. That must be done separately. |
| * |
| * Returns: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) |
| { |
| struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| |
| if (vhost->mq_enabled && vhost->using_channels) |
| return ibmvfc_cancel_all_mq(sdev, type); |
| else |
| return ibmvfc_cancel_all_sq(sdev, type); |
| } |
| |
| /** |
| * ibmvfc_match_key - Match function for specified cancel key |
| * @evt: ibmvfc event struct |
| * @key: cancel key to match |
| * |
| * Returns: |
| * 1 if event matches key / 0 if event does not match key |
| **/ |
| static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) |
| { |
| unsigned long cancel_key = (unsigned long)key; |
| |
| if (evt->crq.format == IBMVFC_CMD_FORMAT && |
| be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) |
| return 1; |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_match_evt - Match function for specified event |
| * @evt: ibmvfc event struct |
| * @match: event to match |
| * |
| * Returns: |
| * 1 if event matches key / 0 if event does not match key |
| **/ |
| static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) |
| { |
| if (evt == match) |
| return 1; |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_abort_task_set - Abort outstanding commands to the device |
| * @sdev: scsi device to abort commands |
| * |
| * This sends an Abort Task Set to the VIOS for the specified device. This does |
| * NOT send any cancel to the VIOS. That must be done separately. |
| * |
| * Returns: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_abort_task_set(struct scsi_device *sdev) |
| { |
| struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| struct ibmvfc_cmd *tmf; |
| struct ibmvfc_event *evt, *found_evt; |
| union ibmvfc_iu rsp_iu; |
| struct ibmvfc_fcp_cmd_iu *iu; |
| struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); |
| int rc, rsp_rc = -EBUSY; |
| unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; |
| int rsp_code = 0; |
| |
| found_evt = NULL; |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| spin_lock(&vhost->crq.l_lock); |
| list_for_each_entry(evt, &vhost->crq.sent, queue_list) { |
| if (evt->cmnd && evt->cmnd->device == sdev) { |
| found_evt = evt; |
| break; |
| } |
| } |
| spin_unlock(&vhost->crq.l_lock); |
| |
| if (!found_evt) { |
| if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return 0; |
| } |
| |
| if (vhost->state == IBMVFC_ACTIVE) { |
| evt = ibmvfc_get_event(&vhost->crq); |
| if (!evt) { |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return -ENOMEM; |
| } |
| ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); |
| tmf = ibmvfc_init_vfc_cmd(evt, sdev); |
| iu = ibmvfc_get_fcp_iu(vhost, tmf); |
| |
| if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) |
| tmf->target_wwpn = cpu_to_be64(rport->port_name); |
| iu->tmf_flags = IBMVFC_ABORT_TASK_SET; |
| tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); |
| evt->sync_iu = &rsp_iu; |
| |
| tmf->correlation = cpu_to_be64((u64)evt); |
| |
| init_completion(&evt->comp); |
| rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| } |
| |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| if (rsp_rc != 0) { |
| sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); |
| return -EIO; |
| } |
| |
| sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); |
| timeout = wait_for_completion_timeout(&evt->comp, timeout); |
| |
| if (!timeout) { |
| rc = ibmvfc_cancel_all(sdev, 0); |
| if (!rc) { |
| rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); |
| if (rc == SUCCESS) |
| rc = 0; |
| } |
| |
| if (rc) { |
| sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); |
| ibmvfc_reset_host(vhost); |
| rsp_rc = -EIO; |
| rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); |
| |
| if (rc == SUCCESS) |
| rsp_rc = 0; |
| |
| rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); |
| if (rc != SUCCESS) { |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| ibmvfc_hard_reset_host(vhost); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| rsp_rc = 0; |
| } |
| |
| goto out; |
| } |
| } |
| |
| if (rsp_iu.cmd.status) |
| rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); |
| |
| if (rsp_code) { |
| if (fc_rsp->flags & FCP_RSP_LEN_VALID) |
| rsp_code = fc_rsp->data.info.rsp_code; |
| |
| sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " |
| "flags: %x fcp_rsp: %x, scsi_status: %x\n", |
| ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), |
| be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, |
| fc_rsp->scsi_status); |
| rsp_rc = -EIO; |
| } else |
| sdev_printk(KERN_INFO, sdev, "Abort successful\n"); |
| |
| out: |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| ibmvfc_free_event(evt); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return rsp_rc; |
| } |
| |
| /** |
| * ibmvfc_eh_abort_handler - Abort a command |
| * @cmd: scsi command to abort |
| * |
| * Returns: |
| * SUCCESS / FAST_IO_FAIL / FAILED |
| **/ |
| static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) |
| { |
| struct scsi_device *sdev = cmd->device; |
| struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| int cancel_rc, block_rc; |
| int rc = FAILED; |
| |
| ENTER; |
| block_rc = fc_block_scsi_eh(cmd); |
| ibmvfc_wait_while_resetting(vhost); |
| if (block_rc != FAST_IO_FAIL) { |
| cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); |
| ibmvfc_abort_task_set(sdev); |
| } else |
| cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
| |
| if (!cancel_rc) |
| rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); |
| |
| if (block_rc == FAST_IO_FAIL && rc != FAILED) |
| rc = FAST_IO_FAIL; |
| |
| LEAVE; |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_eh_device_reset_handler - Reset a single LUN |
| * @cmd: scsi command struct |
| * |
| * Returns: |
| * SUCCESS / FAST_IO_FAIL / FAILED |
| **/ |
| static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) |
| { |
| struct scsi_device *sdev = cmd->device; |
| struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| int cancel_rc, block_rc, reset_rc = 0; |
| int rc = FAILED; |
| |
| ENTER; |
| block_rc = fc_block_scsi_eh(cmd); |
| ibmvfc_wait_while_resetting(vhost); |
| if (block_rc != FAST_IO_FAIL) { |
| cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); |
| reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); |
| } else |
| cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
| |
| if (!cancel_rc && !reset_rc) |
| rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); |
| |
| if (block_rc == FAST_IO_FAIL && rc != FAILED) |
| rc = FAST_IO_FAIL; |
| |
| LEAVE; |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function |
| * @sdev: scsi device struct |
| * @data: return code |
| * |
| **/ |
| static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) |
| { |
| unsigned long *rc = data; |
| *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
| } |
| |
| /** |
| * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function |
| * @sdev: scsi device struct |
| * @data: return code |
| * |
| **/ |
| static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) |
| { |
| unsigned long *rc = data; |
| *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); |
| } |
| |
| /** |
| * ibmvfc_eh_target_reset_handler - Reset the target |
| * @cmd: scsi command struct |
| * |
| * Returns: |
| * SUCCESS / FAST_IO_FAIL / FAILED |
| **/ |
| static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) |
| { |
| struct scsi_device *sdev = cmd->device; |
| struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| struct scsi_target *starget = scsi_target(sdev); |
| int block_rc; |
| int reset_rc = 0; |
| int rc = FAILED; |
| unsigned long cancel_rc = 0; |
| |
| ENTER; |
| block_rc = fc_block_scsi_eh(cmd); |
| ibmvfc_wait_while_resetting(vhost); |
| if (block_rc != FAST_IO_FAIL) { |
| starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); |
| reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); |
| } else |
| starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); |
| |
| if (!cancel_rc && !reset_rc) |
| rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); |
| |
| if (block_rc == FAST_IO_FAIL && rc != FAILED) |
| rc = FAST_IO_FAIL; |
| |
| LEAVE; |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_eh_host_reset_handler - Reset the connection to the server |
| * @cmd: struct scsi_cmnd having problems |
| * |
| **/ |
| static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) |
| { |
| int rc; |
| struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
| |
| dev_err(vhost->dev, "Resetting connection due to error recovery\n"); |
| rc = ibmvfc_issue_fc_host_lip(vhost->host); |
| |
| return rc ? FAILED : SUCCESS; |
| } |
| |
| /** |
| * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. |
| * @rport: rport struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_terminate_rport_io(struct fc_rport *rport) |
| { |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| struct fc_rport *dev_rport; |
| struct scsi_device *sdev; |
| struct ibmvfc_target *tgt; |
| unsigned long rc, flags; |
| unsigned int found; |
| |
| ENTER; |
| shost_for_each_device(sdev, shost) { |
| dev_rport = starget_to_rport(scsi_target(sdev)); |
| if (dev_rport != rport) |
| continue; |
| ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
| } |
| |
| rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); |
| |
| if (rc == FAILED) |
| ibmvfc_issue_fc_host_lip(shost); |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| found = 0; |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->scsi_id == rport->port_id) { |
| found++; |
| break; |
| } |
| } |
| |
| if (found && tgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { |
| /* |
| * If we get here, that means we previously attempted to send |
| * an implicit logout to the target but it failed, most likely |
| * due to I/O being pending, so we need to send it again |
| */ |
| ibmvfc_del_tgt(tgt); |
| ibmvfc_reinit_host(vhost); |
| } |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| LEAVE; |
| } |
| |
| static const struct ibmvfc_async_desc ae_desc [] = { |
| { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, |
| { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, |
| { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, |
| { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, |
| { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, |
| { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, |
| { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, |
| { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, |
| { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, |
| { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, |
| { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, |
| { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, |
| { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, |
| }; |
| |
| static const struct ibmvfc_async_desc unknown_ae = { |
| "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL |
| }; |
| |
| /** |
| * ibmvfc_get_ae_desc - Get text description for async event |
| * @ae: async event |
| * |
| **/ |
| static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(ae_desc); i++) |
| if (ae_desc[i].ae == ae) |
| return &ae_desc[i]; |
| |
| return &unknown_ae; |
| } |
| |
| static const struct { |
| enum ibmvfc_ae_link_state state; |
| const char *desc; |
| } link_desc [] = { |
| { IBMVFC_AE_LS_LINK_UP, " link up" }, |
| { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, |
| { IBMVFC_AE_LS_LINK_DOWN, " link down" }, |
| { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, |
| }; |
| |
| /** |
| * ibmvfc_get_link_state - Get text description for link state |
| * @state: link state |
| * |
| **/ |
| static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(link_desc); i++) |
| if (link_desc[i].state == state) |
| return link_desc[i].desc; |
| |
| return ""; |
| } |
| |
| /** |
| * ibmvfc_handle_async - Handle an async event from the adapter |
| * @crq: crq to process |
| * @vhost: ibmvfc host struct |
| * |
| **/ |
| static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, |
| struct ibmvfc_host *vhost) |
| { |
| const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); |
| struct ibmvfc_target *tgt; |
| |
| ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," |
| " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), |
| be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), |
| ibmvfc_get_link_state(crq->link_state)); |
| |
| switch (be64_to_cpu(crq->event)) { |
| case IBMVFC_AE_RESUME: |
| switch (crq->link_state) { |
| case IBMVFC_AE_LS_LINK_DOWN: |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| break; |
| case IBMVFC_AE_LS_LINK_DEAD: |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| break; |
| case IBMVFC_AE_LS_LINK_UP: |
| case IBMVFC_AE_LS_LINK_BOUNCED: |
| default: |
| vhost->events_to_log |= IBMVFC_AE_LINKUP; |
| vhost->delay_init = 1; |
| __ibmvfc_reset_host(vhost); |
| break; |
| } |
| |
| break; |
| case IBMVFC_AE_LINK_UP: |
| vhost->events_to_log |= IBMVFC_AE_LINKUP; |
| vhost->delay_init = 1; |
| __ibmvfc_reset_host(vhost); |
| break; |
| case IBMVFC_AE_SCN_FABRIC: |
| case IBMVFC_AE_SCN_DOMAIN: |
| vhost->events_to_log |= IBMVFC_AE_RSCN; |
| if (vhost->state < IBMVFC_HALTED) { |
| vhost->delay_init = 1; |
| __ibmvfc_reset_host(vhost); |
| } |
| break; |
| case IBMVFC_AE_SCN_NPORT: |
| case IBMVFC_AE_SCN_GROUP: |
| vhost->events_to_log |= IBMVFC_AE_RSCN; |
| ibmvfc_reinit_host(vhost); |
| break; |
| case IBMVFC_AE_ELS_LOGO: |
| case IBMVFC_AE_ELS_PRLO: |
| case IBMVFC_AE_ELS_PLOGI: |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (!crq->scsi_id && !crq->wwpn && !crq->node_name) |
| break; |
| if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) |
| continue; |
| if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) |
| continue; |
| if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) |
| continue; |
| if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) |
| tgt->logo_rcvd = 1; |
| if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { |
| ibmvfc_del_tgt(tgt); |
| ibmvfc_reinit_host(vhost); |
| } |
| } |
| break; |
| case IBMVFC_AE_LINK_DOWN: |
| case IBMVFC_AE_ADAPTER_FAILED: |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| break; |
| case IBMVFC_AE_LINK_DEAD: |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| break; |
| case IBMVFC_AE_HALT: |
| ibmvfc_link_down(vhost, IBMVFC_HALTED); |
| break; |
| default: |
| dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); |
| break; |
| } |
| } |
| |
| /** |
| * ibmvfc_handle_crq - Handles and frees received events in the CRQ |
| * @crq: Command/Response queue |
| * @vhost: ibmvfc host struct |
| * @evt_doneq: Event done queue |
| * |
| **/ |
| static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, |
| struct list_head *evt_doneq) |
| { |
| long rc; |
| struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); |
| |
| switch (crq->valid) { |
| case IBMVFC_CRQ_INIT_RSP: |
| switch (crq->format) { |
| case IBMVFC_CRQ_INIT: |
| dev_info(vhost->dev, "Partner initialized\n"); |
| /* Send back a response */ |
| rc = ibmvfc_send_crq_init_complete(vhost); |
| if (rc == 0) |
| ibmvfc_init_host(vhost); |
| else |
| dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); |
| break; |
| case IBMVFC_CRQ_INIT_COMPLETE: |
| dev_info(vhost->dev, "Partner initialization complete\n"); |
| ibmvfc_init_host(vhost); |
| break; |
| default: |
| dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); |
| } |
| return; |
| case IBMVFC_CRQ_XPORT_EVENT: |
| vhost->state = IBMVFC_NO_CRQ; |
| vhost->logged_in = 0; |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| if (crq->format == IBMVFC_PARTITION_MIGRATED) { |
| /* We need to re-setup the interpartition connection */ |
| dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n"); |
| vhost->client_migrated = 1; |
| |
| scsi_block_requests(vhost->host); |
| ibmvfc_purge_requests(vhost, DID_REQUEUE); |
| ibmvfc_set_host_state(vhost, IBMVFC_LINK_DOWN); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); |
| wake_up(&vhost->work_wait_q); |
| } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) { |
| dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format); |
| ibmvfc_purge_requests(vhost, DID_ERROR); |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); |
| } else { |
| dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format); |
| } |
| return; |
| case IBMVFC_CRQ_CMD_RSP: |
| break; |
| default: |
| dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); |
| return; |
| } |
| |
| if (crq->format == IBMVFC_ASYNC_EVENT) |
| return; |
| |
| /* The only kind of payload CRQs we should get are responses to |
| * things we send. Make sure this response is to something we |
| * actually sent |
| */ |
| if (unlikely(!ibmvfc_valid_event(&vhost->crq.evt_pool, evt))) { |
| dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", |
| crq->ioba); |
| return; |
| } |
| |
| if (unlikely(atomic_dec_if_positive(&evt->active))) { |
| dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", |
| crq->ioba); |
| return; |
| } |
| |
| spin_lock(&evt->queue->l_lock); |
| list_move_tail(&evt->queue_list, evt_doneq); |
| spin_unlock(&evt->queue->l_lock); |
| } |
| |
| /** |
| * ibmvfc_scan_finished - Check if the device scan is done. |
| * @shost: scsi host struct |
| * @time: current elapsed time |
| * |
| * Returns: |
| * 0 if scan is not done / 1 if scan is done |
| **/ |
| static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) |
| { |
| unsigned long flags; |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| int done = 0; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| if (!vhost->scan_timeout) |
| done = 1; |
| else if (time >= (vhost->scan_timeout * HZ)) { |
| dev_info(vhost->dev, "Scan taking longer than %d seconds, " |
| "continuing initialization\n", vhost->scan_timeout); |
| done = 1; |
| } |
| |
| if (vhost->scan_complete) { |
| vhost->scan_timeout = init_timeout; |
| done = 1; |
| } |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return done; |
| } |
| |
| /** |
| * ibmvfc_slave_alloc - Setup the device's task set value |
| * @sdev: struct scsi_device device to configure |
| * |
| * Set the device's task set value so that error handling works as |
| * expected. |
| * |
| * Returns: |
| * 0 on success / -ENXIO if device does not exist |
| **/ |
| static int ibmvfc_slave_alloc(struct scsi_device *sdev) |
| { |
| struct Scsi_Host *shost = sdev->host; |
| struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| unsigned long flags = 0; |
| |
| if (!rport || fc_remote_port_chkready(rport)) |
| return -ENXIO; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| sdev->hostdata = (void *)(unsigned long)vhost->task_set++; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_target_alloc - Setup the target's task set value |
| * @starget: struct scsi_target |
| * |
| * Set the target's task set value so that error handling works as |
| * expected. |
| * |
| * Returns: |
| * 0 on success / -ENXIO if device does not exist |
| **/ |
| static int ibmvfc_target_alloc(struct scsi_target *starget) |
| { |
| struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| unsigned long flags = 0; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| starget->hostdata = (void *)(unsigned long)vhost->task_set++; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_slave_configure - Configure the device |
| * @sdev: struct scsi_device device to configure |
| * |
| * Enable allow_restart for a device if it is a disk. Adjust the |
| * queue_depth here also. |
| * |
| * Returns: |
| * 0 |
| **/ |
| static int ibmvfc_slave_configure(struct scsi_device *sdev) |
| { |
| struct Scsi_Host *shost = sdev->host; |
| unsigned long flags = 0; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| if (sdev->type == TYPE_DISK) { |
| sdev->allow_restart = 1; |
| blk_queue_rq_timeout(sdev->request_queue, 120 * HZ); |
| } |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_change_queue_depth - Change the device's queue depth |
| * @sdev: scsi device struct |
| * @qdepth: depth to set |
| * |
| * Return value: |
| * actual depth set |
| **/ |
| static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) |
| { |
| if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) |
| qdepth = IBMVFC_MAX_CMDS_PER_LUN; |
| |
| return scsi_change_queue_depth(sdev, qdepth); |
| } |
| |
| static ssize_t ibmvfc_show_host_partition_name(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", |
| vhost->login_buf->resp.partition_name); |
| } |
| |
| static ssize_t ibmvfc_show_host_device_name(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", |
| vhost->login_buf->resp.device_name); |
| } |
| |
| static ssize_t ibmvfc_show_host_loc_code(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", |
| vhost->login_buf->resp.port_loc_code); |
| } |
| |
| static ssize_t ibmvfc_show_host_drc_name(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", |
| vhost->login_buf->resp.drc_name); |
| } |
| |
| static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| return snprintf(buf, PAGE_SIZE, "%d\n", be32_to_cpu(vhost->login_buf->resp.version)); |
| } |
| |
| static ssize_t ibmvfc_show_host_capabilities(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| return snprintf(buf, PAGE_SIZE, "%llx\n", be64_to_cpu(vhost->login_buf->resp.capabilities)); |
| } |
| |
| /** |
| * ibmvfc_show_log_level - Show the adapter's error logging level |
| * @dev: class device struct |
| * @attr: unused |
| * @buf: buffer |
| * |
| * Return value: |
| * number of bytes printed to buffer |
| **/ |
| static ssize_t ibmvfc_show_log_level(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| unsigned long flags = 0; |
| int len; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return len; |
| } |
| |
| /** |
| * ibmvfc_store_log_level - Change the adapter's error logging level |
| * @dev: class device struct |
| * @attr: unused |
| * @buf: buffer |
| * @count: buffer size |
| * |
| * Return value: |
| * number of bytes printed to buffer |
| **/ |
| static ssize_t ibmvfc_store_log_level(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| unsigned long flags = 0; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| vhost->log_level = simple_strtoul(buf, NULL, 10); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return strlen(buf); |
| } |
| |
| static ssize_t ibmvfc_show_scsi_channels(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| unsigned long flags = 0; |
| int len; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->client_scsi_channels); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return len; |
| } |
| |
| static ssize_t ibmvfc_store_scsi_channels(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| unsigned long flags = 0; |
| unsigned int channels; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| channels = simple_strtoul(buf, NULL, 10); |
| vhost->client_scsi_channels = min(channels, nr_scsi_hw_queues); |
| ibmvfc_hard_reset_host(vhost); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return strlen(buf); |
| } |
| |
| static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); |
| static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); |
| static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); |
| static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); |
| static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); |
| static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); |
| static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, |
| ibmvfc_show_log_level, ibmvfc_store_log_level); |
| static DEVICE_ATTR(nr_scsi_channels, S_IRUGO | S_IWUSR, |
| ibmvfc_show_scsi_channels, ibmvfc_store_scsi_channels); |
| |
| #ifdef CONFIG_SCSI_IBMVFC_TRACE |
| /** |
| * ibmvfc_read_trace - Dump the adapter trace |
| * @filp: open sysfs file |
| * @kobj: kobject struct |
| * @bin_attr: bin_attribute struct |
| * @buf: buffer |
| * @off: offset |
| * @count: buffer size |
| * |
| * Return value: |
| * number of bytes printed to buffer |
| **/ |
| static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, |
| struct bin_attribute *bin_attr, |
| char *buf, loff_t off, size_t count) |
| { |
| struct device *dev = kobj_to_dev(kobj); |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| unsigned long flags = 0; |
| int size = IBMVFC_TRACE_SIZE; |
| char *src = (char *)vhost->trace; |
| |
| if (off > size) |
| return 0; |
| if (off + count > size) { |
| size -= off; |
| count = size; |
| } |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| memcpy(buf, &src[off], count); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return count; |
| } |
| |
| static struct bin_attribute ibmvfc_trace_attr = { |
| .attr = { |
| .name = "trace", |
| .mode = S_IRUGO, |
| }, |
| .size = 0, |
| .read = ibmvfc_read_trace, |
| }; |
| #endif |
| |
| static struct device_attribute *ibmvfc_attrs[] = { |
| &dev_attr_partition_name, |
| &dev_attr_device_name, |
| &dev_attr_port_loc_code, |
| &dev_attr_drc_name, |
| &dev_attr_npiv_version, |
| &dev_attr_capabilities, |
| &dev_attr_log_level, |
| &dev_attr_nr_scsi_channels, |
| NULL |
| }; |
| |
| static struct scsi_host_template driver_template = { |
| .module = THIS_MODULE, |
| .name = "IBM POWER Virtual FC Adapter", |
| .proc_name = IBMVFC_NAME, |
| .queuecommand = ibmvfc_queuecommand, |
| .eh_timed_out = fc_eh_timed_out, |
| .eh_abort_handler = ibmvfc_eh_abort_handler, |
| .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, |
| .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, |
| .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, |
| .slave_alloc = ibmvfc_slave_alloc, |
| .slave_configure = ibmvfc_slave_configure, |
| .target_alloc = ibmvfc_target_alloc, |
| .scan_finished = ibmvfc_scan_finished, |
| .change_queue_depth = ibmvfc_change_queue_depth, |
| .cmd_per_lun = 16, |
| .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, |
| .this_id = -1, |
| .sg_tablesize = SG_ALL, |
| .max_sectors = IBMVFC_MAX_SECTORS, |
| .shost_attrs = ibmvfc_attrs, |
| .track_queue_depth = 1, |
| .host_tagset = 1, |
| }; |
| |
| /** |
| * ibmvfc_next_async_crq - Returns the next entry in async queue |
| * @vhost: ibmvfc host struct |
| * |
| * Returns: |
| * Pointer to next entry in queue / NULL if empty |
| **/ |
| static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_queue *async_crq = &vhost->async_crq; |
| struct ibmvfc_async_crq *crq; |
| |
| crq = &async_crq->msgs.async[async_crq->cur]; |
| if (crq->valid & 0x80) { |
| if (++async_crq->cur == async_crq->size) |
| async_crq->cur = 0; |
| rmb(); |
| } else |
| crq = NULL; |
| |
| return crq; |
| } |
| |
| /** |
| * ibmvfc_next_crq - Returns the next entry in message queue |
| * @vhost: ibmvfc host struct |
| * |
| * Returns: |
| * Pointer to next entry in queue / NULL if empty |
| **/ |
| static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_queue *queue = &vhost->crq; |
| struct ibmvfc_crq *crq; |
| |
| crq = &queue->msgs.crq[queue->cur]; |
| if (crq->valid & 0x80) { |
| if (++queue->cur == queue->size) |
| queue->cur = 0; |
| rmb(); |
| } else |
| crq = NULL; |
| |
| return crq; |
| } |
| |
| /** |
| * ibmvfc_interrupt - Interrupt handler |
| * @irq: number of irq to handle, not used |
| * @dev_instance: ibmvfc_host that received interrupt |
| * |
| * Returns: |
| * IRQ_HANDLED |
| **/ |
| static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) |
| { |
| struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; |
| unsigned long flags; |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| vio_disable_interrupts(to_vio_dev(vhost->dev)); |
| tasklet_schedule(&vhost->tasklet); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ibmvfc_tasklet - Interrupt handler tasklet |
| * @data: ibmvfc host struct |
| * |
| * Returns: |
| * Nothing |
| **/ |
| static void ibmvfc_tasklet(void *data) |
| { |
| struct ibmvfc_host *vhost = data; |
| struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| struct ibmvfc_crq *crq; |
| struct ibmvfc_async_crq *async; |
| struct ibmvfc_event *evt, *temp; |
| unsigned long flags; |
| int done = 0; |
| LIST_HEAD(evt_doneq); |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| spin_lock(vhost->crq.q_lock); |
| while (!done) { |
| /* Pull all the valid messages off the async CRQ */ |
| while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { |
| ibmvfc_handle_async(async, vhost); |
| async->valid = 0; |
| wmb(); |
| } |
| |
| /* Pull all the valid messages off the CRQ */ |
| while ((crq = ibmvfc_next_crq(vhost)) != NULL) { |
| ibmvfc_handle_crq(crq, vhost, &evt_doneq); |
| crq->valid = 0; |
| wmb(); |
| } |
| |
| vio_enable_interrupts(vdev); |
| if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { |
| vio_disable_interrupts(vdev); |
| ibmvfc_handle_async(async, vhost); |
| async->valid = 0; |
| wmb(); |
| } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { |
| vio_disable_interrupts(vdev); |
| ibmvfc_handle_crq(crq, vhost, &evt_doneq); |
| crq->valid = 0; |
| wmb(); |
| } else |
| done = 1; |
| } |
| |
| spin_unlock(vhost->crq.q_lock); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { |
| del_timer(&evt->timer); |
| list_del(&evt->queue_list); |
| ibmvfc_trc_end(evt); |
| evt->done(evt); |
| } |
| } |
| |
| static int ibmvfc_toggle_scrq_irq(struct ibmvfc_queue *scrq, int enable) |
| { |
| struct device *dev = scrq->vhost->dev; |
| struct vio_dev *vdev = to_vio_dev(dev); |
| unsigned long rc; |
| int irq_action = H_ENABLE_VIO_INTERRUPT; |
| |
| if (!enable) |
| irq_action = H_DISABLE_VIO_INTERRUPT; |
| |
| rc = plpar_hcall_norets(H_VIOCTL, vdev->unit_address, irq_action, |
| scrq->hw_irq, 0, 0); |
| |
| if (rc) |
| dev_err(dev, "Couldn't %s sub-crq[%lu] irq. rc=%ld\n", |
| enable ? "enable" : "disable", scrq->hwq_id, rc); |
| |
| return rc; |
| } |
| |
| static void ibmvfc_handle_scrq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, |
| struct list_head *evt_doneq) |
| { |
| struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); |
| |
| switch (crq->valid) { |
| case IBMVFC_CRQ_CMD_RSP: |
| break; |
| case IBMVFC_CRQ_XPORT_EVENT: |
| return; |
| default: |
| dev_err(vhost->dev, "Got and invalid message type 0x%02x\n", crq->valid); |
| return; |
| } |
| |
| /* The only kind of payload CRQs we should get are responses to |
| * things we send. Make sure this response is to something we |
| * actually sent |
| */ |
| if (unlikely(!ibmvfc_valid_event(&evt->queue->evt_pool, evt))) { |
| dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", |
| crq->ioba); |
| return; |
| } |
| |
| if (unlikely(atomic_dec_if_positive(&evt->active))) { |
| dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", |
| crq->ioba); |
| return; |
| } |
| |
| spin_lock(&evt->queue->l_lock); |
| list_move_tail(&evt->queue_list, evt_doneq); |
| spin_unlock(&evt->queue->l_lock); |
| } |
| |
| static struct ibmvfc_crq *ibmvfc_next_scrq(struct ibmvfc_queue *scrq) |
| { |
| struct ibmvfc_crq *crq; |
| |
| crq = &scrq->msgs.scrq[scrq->cur].crq; |
| if (crq->valid & 0x80) { |
| if (++scrq->cur == scrq->size) |
| scrq->cur = 0; |
| rmb(); |
| } else |
| crq = NULL; |
| |
| return crq; |
| } |
| |
| static void ibmvfc_drain_sub_crq(struct ibmvfc_queue *scrq) |
| { |
| struct ibmvfc_crq *crq; |
| struct ibmvfc_event *evt, *temp; |
| unsigned long flags; |
| int done = 0; |
| LIST_HEAD(evt_doneq); |
| |
| spin_lock_irqsave(scrq->q_lock, flags); |
| while (!done) { |
| while ((crq = ibmvfc_next_scrq(scrq)) != NULL) { |
| ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); |
| crq->valid = 0; |
| wmb(); |
| } |
| |
| ibmvfc_toggle_scrq_irq(scrq, 1); |
| if ((crq = ibmvfc_next_scrq(scrq)) != NULL) { |
| ibmvfc_toggle_scrq_irq(scrq, 0); |
| ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); |
| crq->valid = 0; |
| wmb(); |
| } else |
| done = 1; |
| } |
| spin_unlock_irqrestore(scrq->q_lock, flags); |
| |
| list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { |
| del_timer(&evt->timer); |
| list_del(&evt->queue_list); |
| ibmvfc_trc_end(evt); |
| evt->done(evt); |
| } |
| } |
| |
| static irqreturn_t ibmvfc_interrupt_scsi(int irq, void *scrq_instance) |
| { |
| struct ibmvfc_queue *scrq = (struct ibmvfc_queue *)scrq_instance; |
| |
| ibmvfc_toggle_scrq_irq(scrq, 0); |
| ibmvfc_drain_sub_crq(scrq); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ibmvfc_init_tgt - Set the next init job step for the target |
| * @tgt: ibmvfc target struct |
| * @job_step: job step to perform |
| * |
| **/ |
| static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, |
| void (*job_step) (struct ibmvfc_target *)) |
| { |
| if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT)) |
| tgt->job_step = job_step; |
| wake_up(&tgt->vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization |
| * @tgt: ibmvfc target struct |
| * @job_step: initialization job step |
| * |
| * Returns: 1 if step will be retried / 0 if not |
| * |
| **/ |
| static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, |
| void (*job_step) (struct ibmvfc_target *)) |
| { |
| if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { |
| ibmvfc_del_tgt(tgt); |
| wake_up(&tgt->vhost->work_wait_q); |
| return 0; |
| } else |
| ibmvfc_init_tgt(tgt, job_step); |
| return 1; |
| } |
| |
| /* Defined in FC-LS */ |
| static const struct { |
| int code; |
| int retry; |
| int logged_in; |
| } prli_rsp [] = { |
| { 0, 1, 0 }, |
| { 1, 0, 1 }, |
| { 2, 1, 0 }, |
| { 3, 1, 0 }, |
| { 4, 0, 0 }, |
| { 5, 0, 0 }, |
| { 6, 0, 1 }, |
| { 7, 0, 0 }, |
| { 8, 1, 0 }, |
| }; |
| |
| /** |
| * ibmvfc_get_prli_rsp - Find PRLI response index |
| * @flags: PRLI response flags |
| * |
| **/ |
| static int ibmvfc_get_prli_rsp(u16 flags) |
| { |
| int i; |
| int code = (flags & 0x0f00) >> 8; |
| |
| for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) |
| if (prli_rsp[i].code == code) |
| return i; |
| |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_tgt_prli_done - Completion handler for Process Login |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_target *tgt = evt->tgt; |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; |
| struct ibmvfc_prli_svc_parms *parms = &rsp->parms; |
| u32 status = be16_to_cpu(rsp->common.status); |
| int index, level = IBMVFC_DEFAULT_LOG_LEVEL; |
| |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| switch (status) { |
| case IBMVFC_MAD_SUCCESS: |
| tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", |
| parms->type, parms->flags, parms->service_parms); |
| |
| if (parms->type == IBMVFC_SCSI_FCP_TYPE) { |
| index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); |
| if (prli_rsp[index].logged_in) { |
| if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { |
| tgt->need_login = 0; |
| tgt->ids.roles = 0; |
| if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) |
| tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; |
| if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) |
| tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; |
| tgt->add_rport = 1; |
| } else |
| ibmvfc_del_tgt(tgt); |
| } else if (prli_rsp[index].retry) |
| ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
| else |
| ibmvfc_del_tgt(tgt); |
| } else |
| ibmvfc_del_tgt(tgt); |
| break; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| break; |
| case IBMVFC_MAD_CRQ_ERROR: |
| ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
| break; |
| case IBMVFC_MAD_FAILED: |
| default: |
| if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && |
| be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) |
| level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
| else if (tgt->logo_rcvd) |
| level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
| else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) |
| level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
| else |
| ibmvfc_del_tgt(tgt); |
| |
| tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", |
| ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
| be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status); |
| break; |
| } |
| |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| ibmvfc_free_event(evt); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_tgt_send_prli - Send a process login |
| * @tgt: ibmvfc target struct |
| * |
| **/ |
| static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) |
| { |
| struct ibmvfc_process_login *prli; |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct ibmvfc_event *evt; |
| |
| if (vhost->discovery_threads >= disc_threads) |
| return; |
| |
| kref_get(&tgt->kref); |
| evt = ibmvfc_get_event(&vhost->crq); |
| if (!evt) { |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| __ibmvfc_reset_host(vhost); |
| return; |
| } |
| vhost->discovery_threads++; |
| ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); |
| evt->tgt = tgt; |
| prli = &evt->iu.prli; |
| memset(prli, 0, sizeof(*prli)); |
| if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { |
| prli->common.version = cpu_to_be32(2); |
| prli->target_wwpn = cpu_to_be64(tgt->wwpn); |
| } else { |
| prli->common.version = cpu_to_be32(1); |
| } |
| prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); |
| prli->common.length = cpu_to_be16(sizeof(*prli)); |
| prli->scsi_id = cpu_to_be64(tgt->scsi_id); |
| |
| prli->parms.type = IBMVFC_SCSI_FCP_TYPE; |
| prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); |
| prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); |
| prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); |
| |
| if (cls3_error) |
| prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); |
| |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } else |
| tgt_dbg(tgt, "Sent process login\n"); |
| } |
| |
| /** |
| * ibmvfc_tgt_plogi_done - Completion handler for Port Login |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_target *tgt = evt->tgt; |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; |
| u32 status = be16_to_cpu(rsp->common.status); |
| int level = IBMVFC_DEFAULT_LOG_LEVEL; |
| |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| switch (status) { |
| case IBMVFC_MAD_SUCCESS: |
| tgt_dbg(tgt, "Port Login succeeded\n"); |
| if (tgt->ids.port_name && |
| tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { |
| vhost->reinit = 1; |
| tgt_dbg(tgt, "Port re-init required\n"); |
| break; |
| } |
| tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); |
| tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); |
| tgt->ids.port_id = tgt->scsi_id; |
| memcpy(&tgt->service_parms, &rsp->service_parms, |
| sizeof(tgt->service_parms)); |
| memcpy(&tgt->service_parms_change, &rsp->service_parms_change, |
| sizeof(tgt->service_parms_change)); |
| ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); |
| break; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| break; |
| case IBMVFC_MAD_CRQ_ERROR: |
| ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
| break; |
| case IBMVFC_MAD_FAILED: |
| default: |
| if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) |
| level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
| else |
| ibmvfc_del_tgt(tgt); |
| |
| tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
| ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
| be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), |
| ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), |
| ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status); |
| break; |
| } |
| |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| ibmvfc_free_event(evt); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target |
| * @tgt: ibmvfc target struct |
| * |
| **/ |
| static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) |
| { |
| struct ibmvfc_port_login *plogi; |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct ibmvfc_event *evt; |
| |
| if (vhost->discovery_threads >= disc_threads) |
| return; |
| |
| kref_get(&tgt->kref); |
| tgt->logo_rcvd = 0; |
| evt = ibmvfc_get_event(&vhost->crq); |
| if (!evt) { |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| __ibmvfc_reset_host(vhost); |
| return; |
| } |
| vhost->discovery_threads++; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); |
| evt->tgt = tgt; |
| plogi = &evt->iu.plogi; |
| memset(plogi, 0, sizeof(*plogi)); |
| if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { |
| plogi->common.version = cpu_to_be32(2); |
| plogi->target_wwpn = cpu_to_be64(tgt->wwpn); |
| } else { |
| plogi->common.version = cpu_to_be32(1); |
| } |
| plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); |
| plogi->common.length = cpu_to_be16(sizeof(*plogi)); |
| plogi->scsi_id = cpu_to_be64(tgt->scsi_id); |
| |
| if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } else |
| tgt_dbg(tgt, "Sent port login\n"); |
| } |
| |
| /** |
| * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_target *tgt = evt->tgt; |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; |
| u32 status = be16_to_cpu(rsp->common.status); |
| |
| vhost->discovery_threads--; |
| ibmvfc_free_event(evt); |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| |
| switch (status) { |
| case IBMVFC_MAD_SUCCESS: |
| tgt_dbg(tgt, "Implicit Logout succeeded\n"); |
| break; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| wake_up(&vhost->work_wait_q); |
| return; |
| case IBMVFC_MAD_FAILED: |
| default: |
| tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); |
| break; |
| } |
| |
| ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * __ibmvfc_tgt_get_implicit_logout_evt - Allocate and init an event for implicit logout |
| * @tgt: ibmvfc target struct |
| * @done: Routine to call when the event is responded to |
| * |
| * Returns: |
| * Allocated and initialized ibmvfc_event struct |
| **/ |
| static struct ibmvfc_event *__ibmvfc_tgt_get_implicit_logout_evt(struct ibmvfc_target *tgt, |
| void (*done) (struct ibmvfc_event *)) |
| { |
| struct ibmvfc_implicit_logout *mad; |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct ibmvfc_event *evt; |
| |
| kref_get(&tgt->kref); |
| evt = ibmvfc_get_event(&vhost->crq); |
| if (!evt) |
| return NULL; |
| ibmvfc_init_event(evt, done, IBMVFC_MAD_FORMAT); |
| evt->tgt = tgt; |
| mad = &evt->iu.implicit_logout; |
| memset(mad, 0, sizeof(*mad)); |
| mad->common.version = cpu_to_be32(1); |
| mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); |
| mad->common.length = cpu_to_be16(sizeof(*mad)); |
| mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); |
| return evt; |
| } |
| |
| /** |
| * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target |
| * @tgt: ibmvfc target struct |
| * |
| **/ |
| static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) |
| { |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct ibmvfc_event *evt; |
| |
| if (vhost->discovery_threads >= disc_threads) |
| return; |
| |
| vhost->discovery_threads++; |
| evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, |
| ibmvfc_tgt_implicit_logout_done); |
| if (!evt) { |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| __ibmvfc_reset_host(vhost); |
| return; |
| } |
| |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } else |
| tgt_dbg(tgt, "Sent Implicit Logout\n"); |
| } |
| |
| /** |
| * ibmvfc_tgt_implicit_logout_and_del_done - Completion handler for Implicit Logout MAD |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_tgt_implicit_logout_and_del_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_target *tgt = evt->tgt; |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; |
| u32 status = be16_to_cpu(mad->common.status); |
| |
| vhost->discovery_threads--; |
| ibmvfc_free_event(evt); |
| |
| /* |
| * If our state is IBMVFC_HOST_OFFLINE, we could be unloading the |
| * driver in which case we need to free up all the targets. If we are |
| * not unloading, we will still go through a hard reset to get out of |
| * offline state, so there is no need to track the old targets in that |
| * case. |
| */ |
| if (status == IBMVFC_MAD_SUCCESS || vhost->state == IBMVFC_HOST_OFFLINE) |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| else |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT); |
| |
| tgt_dbg(tgt, "Implicit Logout %s\n", (status == IBMVFC_MAD_SUCCESS) ? "succeeded" : "failed"); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_tgt_implicit_logout_and_del - Initiate an Implicit Logout for specified target |
| * @tgt: ibmvfc target struct |
| * |
| **/ |
| static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *tgt) |
| { |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct ibmvfc_event *evt; |
| |
| if (!vhost->logged_in) { |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| return; |
| } |
| |
| if (vhost->discovery_threads >= disc_threads) |
| return; |
| |
| vhost->discovery_threads++; |
| evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, |
| ibmvfc_tgt_implicit_logout_and_del_done); |
| |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT); |
| if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } else |
| tgt_dbg(tgt, "Sent Implicit Logout\n"); |
| } |
| |
| /** |
| * ibmvfc_tgt_move_login_done - Completion handler for Move Login |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_tgt_move_login_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_target *tgt = evt->tgt; |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_move_login *rsp = &evt->xfer_iu->move_login; |
| u32 status = be16_to_cpu(rsp->common.status); |
| int level = IBMVFC_DEFAULT_LOG_LEVEL; |
| |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| switch (status) { |
| case IBMVFC_MAD_SUCCESS: |
| tgt_dbg(tgt, "Move Login succeeded for new scsi_id: %llX\n", tgt->new_scsi_id); |
| tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); |
| tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); |
| tgt->scsi_id = tgt->new_scsi_id; |
| tgt->ids.port_id = tgt->scsi_id; |
| memcpy(&tgt->service_parms, &rsp->service_parms, |
| sizeof(tgt->service_parms)); |
| memcpy(&tgt->service_parms_change, &rsp->service_parms_change, |
| sizeof(tgt->service_parms_change)); |
| ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); |
| break; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| break; |
| case IBMVFC_MAD_CRQ_ERROR: |
| ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); |
| break; |
| case IBMVFC_MAD_FAILED: |
| default: |
| level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); |
| |
| tgt_log(tgt, level, |
| "Move Login failed: new scsi_id: %llX, flags:%x, vios_flags:%x, rc=0x%02X\n", |
| tgt->new_scsi_id, be32_to_cpu(rsp->flags), be16_to_cpu(rsp->vios_flags), |
| status); |
| break; |
| } |
| |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| ibmvfc_free_event(evt); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| |
| /** |
| * ibmvfc_tgt_move_login - Initiate a move login for specified target |
| * @tgt: ibmvfc target struct |
| * |
| **/ |
| static void ibmvfc_tgt_move_login(struct ibmvfc_target *tgt) |
| { |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct ibmvfc_move_login *move; |
| struct ibmvfc_event *evt; |
| |
| if (vhost->discovery_threads >= disc_threads) |
| return; |
| |
| kref_get(&tgt->kref); |
| evt = ibmvfc_get_event(&vhost->crq); |
| if (!evt) { |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| __ibmvfc_reset_host(vhost); |
| return; |
| } |
| vhost->discovery_threads++; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| ibmvfc_init_event(evt, ibmvfc_tgt_move_login_done, IBMVFC_MAD_FORMAT); |
| evt->tgt = tgt; |
| move = &evt->iu.move_login; |
| memset(move, 0, sizeof(*move)); |
| move->common.version = cpu_to_be32(1); |
| move->common.opcode = cpu_to_be32(IBMVFC_MOVE_LOGIN); |
| move->common.length = cpu_to_be16(sizeof(*move)); |
| |
| move->old_scsi_id = cpu_to_be64(tgt->scsi_id); |
| move->new_scsi_id = cpu_to_be64(tgt->new_scsi_id); |
| move->wwpn = cpu_to_be64(tgt->wwpn); |
| move->node_name = cpu_to_be64(tgt->ids.node_name); |
| |
| if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } else |
| tgt_dbg(tgt, "Sent Move Login for new scsi_id: %llX\n", tgt->new_scsi_id); |
| } |
| |
| /** |
| * ibmvfc_adisc_needs_plogi - Does device need PLOGI? |
| * @mad: ibmvfc passthru mad struct |
| * @tgt: ibmvfc target struct |
| * |
| * Returns: |
| * 1 if PLOGI needed / 0 if PLOGI not needed |
| **/ |
| static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, |
| struct ibmvfc_target *tgt) |
| { |
| if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name) |
| return 1; |
| if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name) |
| return 1; |
| if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) |
| return 1; |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_tgt_adisc_done - Completion handler for ADISC |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_target *tgt = evt->tgt; |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; |
| u32 status = be16_to_cpu(mad->common.status); |
| u8 fc_reason, fc_explain; |
| |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| del_timer(&tgt->timer); |
| |
| switch (status) { |
| case IBMVFC_MAD_SUCCESS: |
| tgt_dbg(tgt, "ADISC succeeded\n"); |
| if (ibmvfc_adisc_needs_plogi(mad, tgt)) |
| ibmvfc_del_tgt(tgt); |
| break; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| break; |
| case IBMVFC_MAD_FAILED: |
| default: |
| ibmvfc_del_tgt(tgt); |
| fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; |
| fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; |
| tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
| ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), |
| be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error), |
| ibmvfc_get_fc_type(fc_reason), fc_reason, |
| ibmvfc_get_ls_explain(fc_explain), fc_explain, status); |
| break; |
| } |
| |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| ibmvfc_free_event(evt); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_init_passthru - Initialize an event struct for FC passthru |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_init_passthru(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; |
| |
| memset(mad, 0, sizeof(*mad)); |
| mad->common.version = cpu_to_be32(1); |
| mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); |
| mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); |
| mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + |
| offsetof(struct ibmvfc_passthru_mad, iu)); |
| mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); |
| mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); |
| mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); |
| mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + |
| offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
| offsetof(struct ibmvfc_passthru_fc_iu, payload)); |
| mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); |
| mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + |
| offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
| offsetof(struct ibmvfc_passthru_fc_iu, response)); |
| mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); |
| } |
| |
| /** |
| * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC |
| * @evt: ibmvfc event struct |
| * |
| * Just cleanup this event struct. Everything else is handled by |
| * the ADISC completion handler. If the ADISC never actually comes |
| * back, we still have the timer running on the ADISC event struct |
| * which will fire and cause the CRQ to get reset. |
| * |
| **/ |
| static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_target *tgt = evt->tgt; |
| |
| tgt_dbg(tgt, "ADISC cancel complete\n"); |
| vhost->abort_threads--; |
| ibmvfc_free_event(evt); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_adisc_timeout - Handle an ADISC timeout |
| * @t: ibmvfc target struct |
| * |
| * If an ADISC times out, send a cancel. If the cancel times |
| * out, reset the CRQ. When the ADISC comes back as cancelled, |
| * log back into the target. |
| **/ |
| static void ibmvfc_adisc_timeout(struct timer_list *t) |
| { |
| struct ibmvfc_target *tgt = from_timer(tgt, t, timer); |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct ibmvfc_event *evt; |
| struct ibmvfc_tmf *tmf; |
| unsigned long flags; |
| int rc; |
| |
| tgt_dbg(tgt, "ADISC timeout\n"); |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| if (vhost->abort_threads >= disc_threads || |
| tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || |
| vhost->state != IBMVFC_INITIALIZING || |
| vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return; |
| } |
| |
| vhost->abort_threads++; |
| kref_get(&tgt->kref); |
| evt = ibmvfc_get_event(&vhost->crq); |
| if (!evt) { |
| tgt_err(tgt, "Failed to get cancel event for ADISC.\n"); |
| vhost->abort_threads--; |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| __ibmvfc_reset_host(vhost); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return; |
| } |
| ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); |
| |
| evt->tgt = tgt; |
| tmf = &evt->iu.tmf; |
| memset(tmf, 0, sizeof(*tmf)); |
| if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { |
| tmf->common.version = cpu_to_be32(2); |
| tmf->target_wwpn = cpu_to_be64(tgt->wwpn); |
| } else { |
| tmf->common.version = cpu_to_be32(1); |
| } |
| tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); |
| tmf->common.length = cpu_to_be16(sizeof(*tmf)); |
| tmf->scsi_id = cpu_to_be64(tgt->scsi_id); |
| tmf->cancel_key = cpu_to_be32(tgt->cancel_key); |
| |
| rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| |
| if (rc) { |
| tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); |
| vhost->abort_threads--; |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| __ibmvfc_reset_host(vhost); |
| } else |
| tgt_dbg(tgt, "Attempting to cancel ADISC\n"); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| } |
| |
| /** |
| * ibmvfc_tgt_adisc - Initiate an ADISC for specified target |
| * @tgt: ibmvfc target struct |
| * |
| * When sending an ADISC we end up with two timers running. The |
| * first timer is the timer in the ibmvfc target struct. If this |
| * fires, we send a cancel to the target. The second timer is the |
| * timer on the ibmvfc event for the ADISC, which is longer. If that |
| * fires, it means the ADISC timed out and our attempt to cancel it |
| * also failed, so we need to reset the CRQ. |
| **/ |
| static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) |
| { |
| struct ibmvfc_passthru_mad *mad; |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct ibmvfc_event *evt; |
| |
| if (vhost->discovery_threads >= disc_threads) |
| return; |
| |
| kref_get(&tgt->kref); |
| evt = ibmvfc_get_event(&vhost->crq); |
| if (!evt) { |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| __ibmvfc_reset_host(vhost); |
| return; |
| } |
| vhost->discovery_threads++; |
| ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); |
| evt->tgt = tgt; |
| |
| ibmvfc_init_passthru(evt); |
| mad = &evt->iu.passthru; |
| mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); |
| mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); |
| mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); |
| |
| mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); |
| memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, |
| sizeof(vhost->login_buf->resp.port_name)); |
| memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, |
| sizeof(vhost->login_buf->resp.node_name)); |
| mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); |
| |
| if (timer_pending(&tgt->timer)) |
| mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); |
| else { |
| tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); |
| add_timer(&tgt->timer); |
| } |
| |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { |
| vhost->discovery_threads--; |
| del_timer(&tgt->timer); |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } else |
| tgt_dbg(tgt, "Sent ADISC\n"); |
| } |
| |
| /** |
| * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_target *tgt = evt->tgt; |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; |
| u32 status = be16_to_cpu(rsp->common.status); |
| int level = IBMVFC_DEFAULT_LOG_LEVEL; |
| |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| switch (status) { |
| case IBMVFC_MAD_SUCCESS: |
| tgt_dbg(tgt, "Query Target succeeded\n"); |
| if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) |
| ibmvfc_del_tgt(tgt); |
| else |
| ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); |
| break; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| break; |
| case IBMVFC_MAD_CRQ_ERROR: |
| ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); |
| break; |
| case IBMVFC_MAD_FAILED: |
| default: |
| if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && |
| be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && |
| be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) |
| ibmvfc_del_tgt(tgt); |
| else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) |
| level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); |
| else |
| ibmvfc_del_tgt(tgt); |
| |
| tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
| ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
| be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), |
| ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), |
| ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), |
| status); |
| break; |
| } |
| |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| ibmvfc_free_event(evt); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_tgt_query_target - Initiate a Query Target for specified target |
| * @tgt: ibmvfc target struct |
| * |
| **/ |
| static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) |
| { |
| struct ibmvfc_query_tgt *query_tgt; |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct ibmvfc_event *evt; |
| |
| if (vhost->discovery_threads >= disc_threads) |
| return; |
| |
| kref_get(&tgt->kref); |
| evt = ibmvfc_get_event(&vhost->crq); |
| if (!evt) { |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| __ibmvfc_reset_host(vhost); |
| return; |
| } |
| vhost->discovery_threads++; |
| evt->tgt = tgt; |
| ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); |
| query_tgt = &evt->iu.query_tgt; |
| memset(query_tgt, 0, sizeof(*query_tgt)); |
| query_tgt->common.version = cpu_to_be32(1); |
| query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); |
| query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); |
| query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); |
| |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } else |
| tgt_dbg(tgt, "Sent Query Target\n"); |
| } |
| |
| /** |
| * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target |
| * @vhost: ibmvfc host struct |
| * @target: Holds SCSI ID to allocate target forand the WWPN |
| * |
| * Returns: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, |
| struct ibmvfc_discover_targets_entry *target) |
| { |
| struct ibmvfc_target *stgt = NULL; |
| struct ibmvfc_target *wtgt = NULL; |
| struct ibmvfc_target *tgt; |
| unsigned long flags; |
| u64 scsi_id = be32_to_cpu(target->scsi_id) & IBMVFC_DISC_TGT_SCSI_ID_MASK; |
| u64 wwpn = be64_to_cpu(target->wwpn); |
| |
| /* Look to see if we already have a target allocated for this SCSI ID or WWPN */ |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->wwpn == wwpn) { |
| wtgt = tgt; |
| break; |
| } |
| } |
| |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->scsi_id == scsi_id) { |
| stgt = tgt; |
| break; |
| } |
| } |
| |
| if (wtgt && !stgt) { |
| /* |
| * A WWPN target has moved and we still are tracking the old |
| * SCSI ID. The only way we should be able to get here is if |
| * we attempted to send an implicit logout for the old SCSI ID |
| * and it failed for some reason, such as there being I/O |
| * pending to the target. In this case, we will have already |
| * deleted the rport from the FC transport so we do a move |
| * login, which works even with I/O pending, however, if |
| * there is still I/O pending, it will stay outstanding, so |
| * we only do this if fast fail is disabled for the rport, |
| * otherwise we let terminate_rport_io clean up the port |
| * before we login at the new location. |
| */ |
| if (wtgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { |
| if (wtgt->move_login) { |
| /* |
| * Do a move login here. The old target is no longer |
| * known to the transport layer We don't use the |
| * normal ibmvfc_set_tgt_action to set this, as we |
| * don't normally want to allow this state change. |
| */ |
| wtgt->new_scsi_id = scsi_id; |
| wtgt->action = IBMVFC_TGT_ACTION_INIT; |
| wtgt->init_retries = 0; |
| ibmvfc_init_tgt(wtgt, ibmvfc_tgt_move_login); |
| } |
| goto unlock_out; |
| } else { |
| tgt_err(wtgt, "Unexpected target state: %d, %p\n", |
| wtgt->action, wtgt->rport); |
| } |
| } else if (stgt) { |
| if (tgt->need_login) |
| ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
| goto unlock_out; |
| } |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); |
| memset(tgt, 0, sizeof(*tgt)); |
| tgt->scsi_id = scsi_id; |
| tgt->wwpn = wwpn; |
| tgt->vhost = vhost; |
| tgt->need_login = 1; |
| timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0); |
| kref_init(&tgt->kref); |
| ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| tgt->cancel_key = vhost->task_set++; |
| list_add_tail(&tgt->queue, &vhost->targets); |
| |
| unlock_out: |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets |
| * @vhost: ibmvfc host struct |
| * |
| * Returns: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) |
| { |
| int i, rc; |
| |
| for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) |
| rc = ibmvfc_alloc_target(vhost, &vhost->disc_buf[i]); |
| |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_discover_targets_done - Completion handler for discover targets MAD |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; |
| u32 mad_status = be16_to_cpu(rsp->common.status); |
| int level = IBMVFC_DEFAULT_LOG_LEVEL; |
| |
| switch (mad_status) { |
| case IBMVFC_MAD_SUCCESS: |
| ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); |
| vhost->num_targets = be32_to_cpu(rsp->num_written); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); |
| break; |
| case IBMVFC_MAD_FAILED: |
| level += ibmvfc_retry_host_init(vhost); |
| ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", |
| ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
| be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); |
| break; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| break; |
| default: |
| dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| break; |
| } |
| |
| ibmvfc_free_event(evt); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_discover_targets - Send Discover Targets MAD |
| * @vhost: ibmvfc host struct |
| * |
| **/ |
| static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_discover_targets *mad; |
| struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); |
| int level = IBMVFC_DEFAULT_LOG_LEVEL; |
| |
| if (!evt) { |
| ibmvfc_log(vhost, level, "Discover Targets failed: no available events\n"); |
| ibmvfc_hard_reset_host(vhost); |
| return; |
| } |
| |
| ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); |
| mad = &evt->iu.discover_targets; |
| memset(mad, 0, sizeof(*mad)); |
| mad->common.version = cpu_to_be32(1); |
| mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); |
| mad->common.length = cpu_to_be16(sizeof(*mad)); |
| mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); |
| mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); |
| mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); |
| mad->flags = cpu_to_be32(IBMVFC_DISC_TGT_PORT_ID_WWPN_LIST); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
| |
| if (!ibmvfc_send_event(evt, vhost, default_timeout)) |
| ibmvfc_dbg(vhost, "Sent discover targets\n"); |
| else |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| } |
| |
| static void ibmvfc_channel_setup_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_channel_setup *setup = vhost->channel_setup_buf; |
| struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs; |
| u32 mad_status = be16_to_cpu(evt->xfer_iu->channel_setup.common.status); |
| int level = IBMVFC_DEFAULT_LOG_LEVEL; |
| int flags, active_queues, i; |
| |
| ibmvfc_free_event(evt); |
| |
| switch (mad_status) { |
| case IBMVFC_MAD_SUCCESS: |
| ibmvfc_dbg(vhost, "Channel Setup succeeded\n"); |
| flags = be32_to_cpu(setup->flags); |
| vhost->do_enquiry = 0; |
| active_queues = be32_to_cpu(setup->num_scsi_subq_channels); |
| scrqs->active_queues = active_queues; |
| |
| if (flags & IBMVFC_CHANNELS_CANCELED) { |
| ibmvfc_dbg(vhost, "Channels Canceled\n"); |
| vhost->using_channels = 0; |
| } else { |
| if (active_queues) |
| vhost->using_channels = 1; |
| for (i = 0; i < active_queues; i++) |
| scrqs->scrqs[i].vios_cookie = |
| be64_to_cpu(setup->channel_handles[i]); |
| |
| ibmvfc_dbg(vhost, "Using %u channels\n", |
| vhost->scsi_scrqs.active_queues); |
| } |
| break; |
| case IBMVFC_MAD_FAILED: |
| level += ibmvfc_retry_host_init(vhost); |
| ibmvfc_log(vhost, level, "Channel Setup failed\n"); |
| fallthrough; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| return; |
| default: |
| dev_err(vhost->dev, "Invalid Channel Setup response: 0x%x\n", |
| mad_status); |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| return; |
| } |
| |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| static void ibmvfc_channel_setup(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_channel_setup_mad *mad; |
| struct ibmvfc_channel_setup *setup_buf = vhost->channel_setup_buf; |
| struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); |
| struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs; |
| unsigned int num_channels = |
| min(vhost->client_scsi_channels, vhost->max_vios_scsi_channels); |
| int level = IBMVFC_DEFAULT_LOG_LEVEL; |
| int i; |
| |
| if (!evt) { |
| ibmvfc_log(vhost, level, "Channel Setup failed: no available events\n"); |
| ibmvfc_hard_reset_host(vhost); |
| return; |
| } |
| |
| memset(setup_buf, 0, sizeof(*setup_buf)); |
| if (num_channels == 0) |
| setup_buf->flags = cpu_to_be32(IBMVFC_CANCEL_CHANNELS); |
| else { |
| setup_buf->num_scsi_subq_channels = cpu_to_be32(num_channels); |
| for (i = 0; i < num_channels; i++) |
| setup_buf->channel_handles[i] = cpu_to_be64(scrqs->scrqs[i].cookie); |
| } |
| |
| ibmvfc_init_event(evt, ibmvfc_channel_setup_done, IBMVFC_MAD_FORMAT); |
| mad = &evt->iu.channel_setup; |
| memset(mad, 0, sizeof(*mad)); |
| mad->common.version = cpu_to_be32(1); |
| mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_SETUP); |
| mad->common.length = cpu_to_be16(sizeof(*mad)); |
| mad->buffer.va = cpu_to_be64(vhost->channel_setup_dma); |
| mad->buffer.len = cpu_to_be32(sizeof(*vhost->channel_setup_buf)); |
| |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
| |
| if (!ibmvfc_send_event(evt, vhost, default_timeout)) |
| ibmvfc_dbg(vhost, "Sent channel setup\n"); |
| else |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| } |
| |
| static void ibmvfc_channel_enquiry_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_channel_enquiry *rsp = &evt->xfer_iu->channel_enquiry; |
| u32 mad_status = be16_to_cpu(rsp->common.status); |
| int level = IBMVFC_DEFAULT_LOG_LEVEL; |
| |
| switch (mad_status) { |
| case IBMVFC_MAD_SUCCESS: |
| ibmvfc_dbg(vhost, "Channel Enquiry succeeded\n"); |
| vhost->max_vios_scsi_channels = be32_to_cpu(rsp->num_scsi_subq_channels); |
| ibmvfc_free_event(evt); |
| break; |
| case IBMVFC_MAD_FAILED: |
| level += ibmvfc_retry_host_init(vhost); |
| ibmvfc_log(vhost, level, "Channel Enquiry failed\n"); |
| fallthrough; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| ibmvfc_free_event(evt); |
| return; |
| default: |
| dev_err(vhost->dev, "Invalid Channel Enquiry response: 0x%x\n", |
| mad_status); |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| ibmvfc_free_event(evt); |
| return; |
| } |
| |
| ibmvfc_channel_setup(vhost); |
| } |
| |
| static void ibmvfc_channel_enquiry(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_channel_enquiry *mad; |
| struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); |
| int level = IBMVFC_DEFAULT_LOG_LEVEL; |
| |
| if (!evt) { |
| ibmvfc_log(vhost, level, "Channel Enquiry failed: no available events\n"); |
| ibmvfc_hard_reset_host(vhost); |
| return; |
| } |
| |
| ibmvfc_init_event(evt, ibmvfc_channel_enquiry_done, IBMVFC_MAD_FORMAT); |
| mad = &evt->iu.channel_enquiry; |
| memset(mad, 0, sizeof(*mad)); |
| mad->common.version = cpu_to_be32(1); |
| mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_ENQUIRY); |
| mad->common.length = cpu_to_be16(sizeof(*mad)); |
| |
| if (mig_channels_only) |
| mad->flags |= cpu_to_be32(IBMVFC_NO_CHANNELS_TO_CRQ_SUPPORT); |
| if (mig_no_less_channels) |
| mad->flags |= cpu_to_be32(IBMVFC_NO_N_TO_M_CHANNELS_SUPPORT); |
| |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
| |
| if (!ibmvfc_send_event(evt, vhost, default_timeout)) |
| ibmvfc_dbg(vhost, "Send channel enquiry\n"); |
| else |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| } |
| |
| /** |
| * ibmvfc_npiv_login_done - Completion handler for NPIV Login |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_host *vhost = evt->vhost; |
| u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); |
| struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; |
| unsigned int npiv_max_sectors; |
| int level = IBMVFC_DEFAULT_LOG_LEVEL; |
| |
| switch (mad_status) { |
| case IBMVFC_MAD_SUCCESS: |
| ibmvfc_free_event(evt); |
| break; |
| case IBMVFC_MAD_FAILED: |
| if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) |
| level += ibmvfc_retry_host_init(vhost); |
| else |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", |
| ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
| be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); |
| ibmvfc_free_event(evt); |
| return; |
| case IBMVFC_MAD_CRQ_ERROR: |
| ibmvfc_retry_host_init(vhost); |
| fallthrough; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| ibmvfc_free_event(evt); |
| return; |
| default: |
| dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| ibmvfc_free_event(evt); |
| return; |
| } |
| |
| vhost->client_migrated = 0; |
| |
| if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { |
| dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", |
| rsp->flags); |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| wake_up(&vhost->work_wait_q); |
| return; |
| } |
| |
| if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { |
| dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", |
| rsp->max_cmds); |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| wake_up(&vhost->work_wait_q); |
| return; |
| } |
| |
| vhost->logged_in = 1; |
| npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); |
| dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", |
| rsp->partition_name, rsp->device_name, rsp->port_loc_code, |
| rsp->drc_name, npiv_max_sectors); |
| |
| fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); |
| fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); |
| fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); |
| fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); |
| fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; |
| fc_host_supported_classes(vhost->host) = 0; |
| if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) |
| fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; |
| if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) |
| fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; |
| if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) |
| fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; |
| fc_host_maxframe_size(vhost->host) = |
| be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; |
| |
| vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; |
| vhost->host->max_sectors = npiv_max_sectors; |
| |
| if (ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPORT_CHANNELS) && vhost->do_enquiry) { |
| ibmvfc_channel_enquiry(vhost); |
| } else { |
| vhost->do_enquiry = 0; |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| wake_up(&vhost->work_wait_q); |
| } |
| } |
| |
| /** |
| * ibmvfc_npiv_login - Sends NPIV login |
| * @vhost: ibmvfc host struct |
| * |
| **/ |
| static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_npiv_login_mad *mad; |
| struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); |
| |
| if (!evt) { |
| ibmvfc_dbg(vhost, "NPIV Login failed: no available events\n"); |
| ibmvfc_hard_reset_host(vhost); |
| return; |
| } |
| |
| ibmvfc_gather_partition_info(vhost); |
| ibmvfc_set_login_info(vhost); |
| ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); |
| |
| memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); |
| mad = &evt->iu.npiv_login; |
| memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); |
| mad->common.version = cpu_to_be32(1); |
| mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); |
| mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); |
| mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); |
| mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); |
| |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
| |
| if (!ibmvfc_send_event(evt, vhost, default_timeout)) |
| ibmvfc_dbg(vhost, "Sent NPIV login\n"); |
| else |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| } |
| |
| /** |
| * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_host *vhost = evt->vhost; |
| u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); |
| |
| ibmvfc_free_event(evt); |
| |
| switch (mad_status) { |
| case IBMVFC_MAD_SUCCESS: |
| if (list_empty(&vhost->crq.sent) && |
| vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { |
| ibmvfc_init_host(vhost); |
| return; |
| } |
| break; |
| case IBMVFC_MAD_FAILED: |
| case IBMVFC_MAD_NOT_SUPPORTED: |
| case IBMVFC_MAD_CRQ_ERROR: |
| case IBMVFC_MAD_DRIVER_FAILED: |
| default: |
| ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); |
| break; |
| } |
| |
| ibmvfc_hard_reset_host(vhost); |
| } |
| |
| /** |
| * ibmvfc_npiv_logout - Issue an NPIV Logout |
| * @vhost: ibmvfc host struct |
| * |
| **/ |
| static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_npiv_logout_mad *mad; |
| struct ibmvfc_event *evt; |
| |
| evt = ibmvfc_get_event(&vhost->crq); |
| if (!evt) { |
| ibmvfc_dbg(vhost, "NPIV Logout failed: no available events\n"); |
| ibmvfc_hard_reset_host(vhost); |
| return; |
| } |
| |
| ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); |
| |
| mad = &evt->iu.npiv_logout; |
| memset(mad, 0, sizeof(*mad)); |
| mad->common.version = cpu_to_be32(1); |
| mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); |
| mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); |
| |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); |
| |
| if (!ibmvfc_send_event(evt, vhost, default_timeout)) |
| ibmvfc_dbg(vhost, "Sent NPIV logout\n"); |
| else |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| } |
| |
| /** |
| * ibmvfc_dev_init_to_do - Is there target initialization work to do? |
| * @vhost: ibmvfc host struct |
| * |
| * Returns: |
| * 1 if work to do / 0 if not |
| **/ |
| static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_target *tgt; |
| |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->action == IBMVFC_TGT_ACTION_INIT || |
| tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_dev_logo_to_do - Is there target logout work to do? |
| * @vhost: ibmvfc host struct |
| * |
| * Returns: |
| * 1 if work to do / 0 if not |
| **/ |
| static int ibmvfc_dev_logo_to_do(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_target *tgt; |
| |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT || |
| tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) |
| return 1; |
| } |
| return 0; |
| } |
| |
| /** |
| * __ibmvfc_work_to_do - Is there task level work to do? (no locking) |
| * @vhost: ibmvfc host struct |
| * |
| * Returns: |
| * 1 if work to do / 0 if not |
| **/ |
| static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_target *tgt; |
| |
| if (kthread_should_stop()) |
| return 1; |
| switch (vhost->action) { |
| case IBMVFC_HOST_ACTION_NONE: |
| case IBMVFC_HOST_ACTION_INIT_WAIT: |
| case IBMVFC_HOST_ACTION_LOGO_WAIT: |
| return 0; |
| case IBMVFC_HOST_ACTION_TGT_INIT: |
| case IBMVFC_HOST_ACTION_QUERY_TGTS: |
| if (vhost->discovery_threads == disc_threads) |
| return 0; |
| list_for_each_entry(tgt, &vhost->targets, queue) |
| if (tgt->action == IBMVFC_TGT_ACTION_INIT) |
| return 1; |
| list_for_each_entry(tgt, &vhost->targets, queue) |
| if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) |
| return 0; |
| return 1; |
| case IBMVFC_HOST_ACTION_TGT_DEL: |
| case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
| if (vhost->discovery_threads == disc_threads) |
| return 0; |
| list_for_each_entry(tgt, &vhost->targets, queue) |
| if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) |
| return 1; |
| list_for_each_entry(tgt, &vhost->targets, queue) |
| if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) |
| return 0; |
| return 1; |
| case IBMVFC_HOST_ACTION_LOGO: |
| case IBMVFC_HOST_ACTION_INIT: |
| case IBMVFC_HOST_ACTION_ALLOC_TGTS: |
| case IBMVFC_HOST_ACTION_QUERY: |
| case IBMVFC_HOST_ACTION_RESET: |
| case IBMVFC_HOST_ACTION_REENABLE: |
| default: |
| break; |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * ibmvfc_work_to_do - Is there task level work to do? |
| * @vhost: ibmvfc host struct |
| * |
| * Returns: |
| * 1 if work to do / 0 if not |
| **/ |
| static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) |
| { |
| unsigned long flags; |
| int rc; |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| rc = __ibmvfc_work_to_do(vhost); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_log_ae - Log async events if necessary |
| * @vhost: ibmvfc host struct |
| * @events: events to log |
| * |
| **/ |
| static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) |
| { |
| if (events & IBMVFC_AE_RSCN) |
| fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); |
| if ((events & IBMVFC_AE_LINKDOWN) && |
| vhost->state >= IBMVFC_HALTED) |
| fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); |
| if ((events & IBMVFC_AE_LINKUP) && |
| vhost->state == IBMVFC_INITIALIZING) |
| fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); |
| } |
| |
| /** |
| * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port |
| * @tgt: ibmvfc target struct |
| * |
| **/ |
| static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) |
| { |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct fc_rport *rport; |
| unsigned long flags; |
| |
| tgt_dbg(tgt, "Adding rport\n"); |
| rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| |
| if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { |
| tgt_dbg(tgt, "Deleting rport\n"); |
| list_del(&tgt->queue); |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| fc_remote_port_delete(rport); |
| del_timer_sync(&tgt->timer); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| return; |
| } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { |
| tgt_dbg(tgt, "Deleting rport with outstanding I/O\n"); |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); |
| tgt->rport = NULL; |
| tgt->init_retries = 0; |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| fc_remote_port_delete(rport); |
| return; |
| } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return; |
| } |
| |
| if (rport) { |
| tgt_dbg(tgt, "rport add succeeded\n"); |
| tgt->rport = rport; |
| rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; |
| rport->supported_classes = 0; |
| tgt->target_id = rport->scsi_target_id; |
| if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) |
| rport->supported_classes |= FC_COS_CLASS1; |
| if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) |
| rport->supported_classes |= FC_COS_CLASS2; |
| if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) |
| rport->supported_classes |= FC_COS_CLASS3; |
| if (rport->rqst_q) |
| blk_queue_max_segments(rport->rqst_q, 1); |
| } else |
| tgt_dbg(tgt, "rport add failed\n"); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| } |
| |
| /** |
| * ibmvfc_do_work - Do task level work |
| * @vhost: ibmvfc host struct |
| * |
| **/ |
| static void ibmvfc_do_work(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_target *tgt; |
| unsigned long flags; |
| struct fc_rport *rport; |
| LIST_HEAD(purge); |
| int rc; |
| |
| ibmvfc_log_ae(vhost, vhost->events_to_log); |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| vhost->events_to_log = 0; |
| switch (vhost->action) { |
| case IBMVFC_HOST_ACTION_NONE: |
| case IBMVFC_HOST_ACTION_LOGO_WAIT: |
| case IBMVFC_HOST_ACTION_INIT_WAIT: |
| break; |
| case IBMVFC_HOST_ACTION_RESET: |
| list_splice_init(&vhost->purge, &purge); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| ibmvfc_complete_purge(&purge); |
| rc = ibmvfc_reset_crq(vhost); |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| if (!rc || rc == H_CLOSED) |
| vio_enable_interrupts(to_vio_dev(vhost->dev)); |
| if (vhost->action == IBMVFC_HOST_ACTION_RESET) { |
| /* |
| * The only action we could have changed to would have |
| * been reenable, in which case, we skip the rest of |
| * this path and wait until we've done the re-enable |
| * before sending the crq init. |
| */ |
| vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; |
| |
| if (rc || (rc = ibmvfc_send_crq_init(vhost)) || |
| (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); |
| } |
| } |
| break; |
| case IBMVFC_HOST_ACTION_REENABLE: |
| list_splice_init(&vhost->purge, &purge); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| ibmvfc_complete_purge(&purge); |
| rc = ibmvfc_reenable_crq_queue(vhost); |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| if (vhost->action == IBMVFC_HOST_ACTION_REENABLE) { |
| /* |
| * The only action we could have changed to would have |
| * been reset, in which case, we skip the rest of this |
| * path and wait until we've done the reset before |
| * sending the crq init. |
| */ |
| vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; |
| if (rc || (rc = ibmvfc_send_crq_init(vhost))) { |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); |
| } |
| } |
| break; |
| case IBMVFC_HOST_ACTION_LOGO: |
| vhost->job_step(vhost); |
| break; |
| case IBMVFC_HOST_ACTION_INIT: |
| BUG_ON(vhost->state != IBMVFC_INITIALIZING); |
| if (vhost->delay_init) { |
| vhost->delay_init = 0; |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| ssleep(15); |
| return; |
| } else |
| vhost->job_step(vhost); |
| break; |
| case IBMVFC_HOST_ACTION_QUERY: |
| list_for_each_entry(tgt, &vhost->targets, queue) |
| ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); |
| break; |
| case IBMVFC_HOST_ACTION_QUERY_TGTS: |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->action == IBMVFC_TGT_ACTION_INIT) { |
| tgt->job_step(tgt); |
| break; |
| } |
| } |
| |
| if (!ibmvfc_dev_init_to_do(vhost)) |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); |
| break; |
| case IBMVFC_HOST_ACTION_TGT_DEL: |
| case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { |
| tgt->job_step(tgt); |
| break; |
| } |
| } |
| |
| if (ibmvfc_dev_logo_to_do(vhost)) { |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return; |
| } |
| |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { |
| tgt_dbg(tgt, "Deleting rport\n"); |
| rport = tgt->rport; |
| tgt->rport = NULL; |
| list_del(&tgt->queue); |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| if (rport) |
| fc_remote_port_delete(rport); |
| del_timer_sync(&tgt->timer); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| return; |
| } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { |
| tgt_dbg(tgt, "Deleting rport with I/O outstanding\n"); |
| rport = tgt->rport; |
| tgt->rport = NULL; |
| tgt->init_retries = 0; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); |
| |
| /* |
| * If fast fail is enabled, we wait for it to fire and then clean up |
| * the old port, since we expect the fast fail timer to clean up the |
| * outstanding I/O faster than waiting for normal command timeouts. |
| * However, if fast fail is disabled, any I/O outstanding to the |
| * rport LUNs will stay outstanding indefinitely, since the EH handlers |
| * won't get invoked for I/O's timing out. If this is a NPIV failover |
| * scenario, the better alternative is to use the move login. |
| */ |
| if (rport && rport->fast_io_fail_tmo == -1) |
| tgt->move_login = 1; |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| if (rport) |
| fc_remote_port_delete(rport); |
| return; |
| } |
| } |
| |
| if (vhost->state == IBMVFC_INITIALIZING) { |
| if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { |
| if (vhost->reinit) { |
| vhost->reinit = 0; |
| scsi_block_requests(vhost->host); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| } else { |
| ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| wake_up(&vhost->init_wait_q); |
| schedule_work(&vhost->rport_add_work_q); |
| vhost->init_retries = 0; |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| scsi_unblock_requests(vhost->host); |
| } |
| |
| return; |
| } else { |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
| vhost->job_step = ibmvfc_discover_targets; |
| } |
| } else { |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| scsi_unblock_requests(vhost->host); |
| wake_up(&vhost->init_wait_q); |
| return; |
| } |
| break; |
| case IBMVFC_HOST_ACTION_ALLOC_TGTS: |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| ibmvfc_alloc_targets(vhost); |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| break; |
| case IBMVFC_HOST_ACTION_TGT_INIT: |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->action == IBMVFC_TGT_ACTION_INIT) { |
| tgt->job_step(tgt); |
| break; |
| } |
| } |
| |
| if (!ibmvfc_dev_init_to_do(vhost)) |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); |
| break; |
| default: |
| break; |
| } |
| |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| } |
| |
| /** |
| * ibmvfc_work - Do task level work |
| * @data: ibmvfc host struct |
| * |
| * Returns: |
| * zero |
| **/ |
| static int ibmvfc_work(void *data) |
| { |
| struct ibmvfc_host *vhost = data; |
| int rc; |
| |
| set_user_nice(current, MIN_NICE); |
| |
| while (1) { |
| rc = wait_event_interruptible(vhost->work_wait_q, |
| ibmvfc_work_to_do(vhost)); |
| |
| BUG_ON(rc); |
| |
| if (kthread_should_stop()) |
| break; |
| |
| ibmvfc_do_work(vhost); |
| } |
| |
| ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_alloc_queue - Allocate queue |
| * @vhost: ibmvfc host struct |
| * @queue: ibmvfc queue to allocate |
| * @fmt: queue format to allocate |
| * |
| * Returns: |
| * 0 on success / non-zero on failure |
| **/ |
| static int ibmvfc_alloc_queue(struct ibmvfc_host *vhost, |
| struct ibmvfc_queue *queue, |
| enum ibmvfc_msg_fmt fmt) |
| { |
| struct device *dev = vhost->dev; |
| size_t fmt_size; |
| unsigned int pool_size = 0; |
| |
| ENTER; |
| spin_lock_init(&queue->_lock); |
| queue->q_lock = &queue->_lock; |
| |
| switch (fmt) { |
| case IBMVFC_CRQ_FMT: |
| fmt_size = sizeof(*queue->msgs.crq); |
| pool_size = max_requests + IBMVFC_NUM_INTERNAL_REQ; |
| break; |
| case IBMVFC_ASYNC_FMT: |
| fmt_size = sizeof(*queue->msgs.async); |
| break; |
| case IBMVFC_SUB_CRQ_FMT: |
| fmt_size = sizeof(*queue->msgs.scrq); |
| /* We need one extra event for Cancel Commands */ |
| pool_size = max_requests + 1; |
| break; |
| default: |
| dev_warn(dev, "Unknown command/response queue message format: %d\n", fmt); |
| return -EINVAL; |
| } |
| |
| if (ibmvfc_init_event_pool(vhost, queue, pool_size)) { |
| dev_err(dev, "Couldn't initialize event pool.\n"); |
| return -ENOMEM; |
| } |
| |
| queue->msgs.handle = (void *)get_zeroed_page(GFP_KERNEL); |
| if (!queue->msgs.handle) |
| return -ENOMEM; |
| |
| queue->msg_token = dma_map_single(dev, queue->msgs.handle, PAGE_SIZE, |
| DMA_BIDIRECTIONAL); |
| |
| if (dma_mapping_error(dev, queue->msg_token)) { |
| free_page((unsigned long)queue->msgs.handle); |
| queue->msgs.handle = NULL; |
| return -ENOMEM; |
| } |
| |
| queue->cur = 0; |
| queue->fmt = fmt; |
| queue->size = PAGE_SIZE / fmt_size; |
| |
| queue->vhost = vhost; |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor |
| * @vhost: ibmvfc host struct |
| * |
| * Allocates a page for messages, maps it for dma, and registers |
| * the crq with the hypervisor. |
| * |
| * Return value: |
| * zero on success / other on failure |
| **/ |
| static int ibmvfc_init_crq(struct ibmvfc_host *vhost) |
| { |
| int rc, retrc = -ENOMEM; |
| struct device *dev = vhost->dev; |
| struct vio_dev *vdev = to_vio_dev(dev); |
| struct ibmvfc_queue *crq = &vhost->crq; |
| |
| ENTER; |
| if (ibmvfc_alloc_queue(vhost, crq, IBMVFC_CRQ_FMT)) |
| return -ENOMEM; |
| |
| retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, |
| crq->msg_token, PAGE_SIZE); |
| |
| if (rc == H_RESOURCE) |
| /* maybe kexecing and resource is busy. try a reset */ |
| retrc = rc = ibmvfc_reset_crq(vhost); |
| |
| if (rc == H_CLOSED) |
| dev_warn(dev, "Partner adapter not ready\n"); |
| else if (rc) { |
| dev_warn(dev, "Error %d opening adapter\n", rc); |
| goto reg_crq_failed; |
| } |
| |
| retrc = 0; |
| |
| tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); |
| |
| if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { |
| dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); |
| goto req_irq_failed; |
| } |
| |
| if ((rc = vio_enable_interrupts(vdev))) { |
| dev_err(dev, "Error %d enabling interrupts\n", rc); |
| goto req_irq_failed; |
| } |
| |
| LEAVE; |
| return retrc; |
| |
| req_irq_failed: |
| tasklet_kill(&vhost->tasklet); |
| do { |
| rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| reg_crq_failed: |
| ibmvfc_free_queue(vhost, crq); |
| return retrc; |
| } |
| |
| static int ibmvfc_register_scsi_channel(struct ibmvfc_host *vhost, |
| int index) |
| { |
| struct device *dev = vhost->dev; |
| struct vio_dev *vdev = to_vio_dev(dev); |
| struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index]; |
| int rc = -ENOMEM; |
| |
| ENTER; |
| |
| rc = h_reg_sub_crq(vdev->unit_address, scrq->msg_token, PAGE_SIZE, |
| &scrq->cookie, &scrq->hw_irq); |
| |
| /* H_CLOSED indicates successful register, but no CRQ partner */ |
| if (rc && rc != H_CLOSED) { |
| dev_warn(dev, "Error registering sub-crq: %d\n", rc); |
| if (rc == H_PARAMETER) |
| dev_warn_once(dev, "Firmware may not support MQ\n"); |
| goto reg_failed; |
| } |
| |
| scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); |
| |
| if (!scrq->irq) { |
| rc = -EINVAL; |
| dev_err(dev, "Error mapping sub-crq[%d] irq\n", index); |
| goto irq_failed; |
| } |
| |
| snprintf(scrq->name, sizeof(scrq->name), "ibmvfc-%x-scsi%d", |
| vdev->unit_address, index); |
| rc = request_irq(scrq->irq, ibmvfc_interrupt_scsi, 0, scrq->name, scrq); |
| |
| if (rc) { |
| dev_err(dev, "Couldn't register sub-crq[%d] irq\n", index); |
| irq_dispose_mapping(scrq->irq); |
| goto irq_failed; |
| } |
| |
| scrq->hwq_id = index; |
| |
| LEAVE; |
| return 0; |
| |
| irq_failed: |
| do { |
| rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, scrq->cookie); |
| } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| reg_failed: |
| LEAVE; |
| return rc; |
| } |
| |
| static void ibmvfc_deregister_scsi_channel(struct ibmvfc_host *vhost, int index) |
| { |
| struct device *dev = vhost->dev; |
| struct vio_dev *vdev = to_vio_dev(dev); |
| struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index]; |
| long rc; |
| |
| ENTER; |
| |
| free_irq(scrq->irq, scrq); |
| irq_dispose_mapping(scrq->irq); |
| scrq->irq = 0; |
| |
| do { |
| rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, |
| scrq->cookie); |
| } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| |
| if (rc) |
| dev_err(dev, "Failed to free sub-crq[%d]: rc=%ld\n", index, rc); |
| |
| /* Clean out the queue */ |
| memset(scrq->msgs.crq, 0, PAGE_SIZE); |
| scrq->cur = 0; |
| |
| LEAVE; |
| } |
| |
| static void ibmvfc_reg_sub_crqs(struct ibmvfc_host *vhost) |
| { |
| int i, j; |
| |
| ENTER; |
| if (!vhost->mq_enabled || !vhost->scsi_scrqs.scrqs) |
| return; |
| |
| for (i = 0; i < nr_scsi_hw_queues; i++) { |
| if (ibmvfc_register_scsi_channel(vhost, i)) { |
| for (j = i; j > 0; j--) |
| ibmvfc_deregister_scsi_channel(vhost, j - 1); |
| vhost->do_enquiry = 0; |
| return; |
| } |
| } |
| |
| LEAVE; |
| } |
| |
| static void ibmvfc_dereg_sub_crqs(struct ibmvfc_host *vhost) |
| { |
| int i; |
| |
| ENTER; |
| if (!vhost->mq_enabled || !vhost->scsi_scrqs.scrqs) |
| return; |
| |
| for (i = 0; i < nr_scsi_hw_queues; i++) |
| ibmvfc_deregister_scsi_channel(vhost, i); |
| |
| LEAVE; |
| } |
| |
| static void ibmvfc_init_sub_crqs(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_queue *scrq; |
| int i, j; |
| |
| ENTER; |
| if (!vhost->mq_enabled) |
| return; |
| |
| vhost->scsi_scrqs.scrqs = kcalloc(nr_scsi_hw_queues, |
| sizeof(*vhost->scsi_scrqs.scrqs), |
| GFP_KERNEL); |
| if (!vhost->scsi_scrqs.scrqs) { |
| vhost->do_enquiry = 0; |
| return; |
| } |
| |
| for (i = 0; i < nr_scsi_hw_queues; i++) { |
| scrq = &vhost->scsi_scrqs.scrqs[i]; |
| if (ibmvfc_alloc_queue(vhost, scrq, IBMVFC_SUB_CRQ_FMT)) { |
| for (j = i; j > 0; j--) { |
| scrq = &vhost->scsi_scrqs.scrqs[j - 1]; |
| ibmvfc_free_queue(vhost, scrq); |
| } |
| kfree(vhost->scsi_scrqs.scrqs); |
| vhost->scsi_scrqs.scrqs = NULL; |
| vhost->scsi_scrqs.active_queues = 0; |
| vhost->do_enquiry = 0; |
| vhost->mq_enabled = 0; |
| return; |
| } |
| } |
| |
| ibmvfc_reg_sub_crqs(vhost); |
| |
| LEAVE; |
| } |
| |
| static void ibmvfc_release_sub_crqs(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_queue *scrq; |
| int i; |
| |
| ENTER; |
| if (!vhost->scsi_scrqs.scrqs) |
| return; |
| |
| ibmvfc_dereg_sub_crqs(vhost); |
| |
| for (i = 0; i < nr_scsi_hw_queues; i++) { |
| scrq = &vhost->scsi_scrqs.scrqs[i]; |
| ibmvfc_free_queue(vhost, scrq); |
| } |
| |
| kfree(vhost->scsi_scrqs.scrqs); |
| vhost->scsi_scrqs.scrqs = NULL; |
| vhost->scsi_scrqs.active_queues = 0; |
| LEAVE; |
| } |
| |
| /** |
| * ibmvfc_free_mem - Free memory for vhost |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_free_mem(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_queue *async_q = &vhost->async_crq; |
| |
| ENTER; |
| mempool_destroy(vhost->tgt_pool); |
| kfree(vhost->trace); |
| dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, |
| vhost->disc_buf_dma); |
| dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), |
| vhost->login_buf, vhost->login_buf_dma); |
| dma_free_coherent(vhost->dev, sizeof(*vhost->channel_setup_buf), |
| vhost->channel_setup_buf, vhost->channel_setup_dma); |
| dma_pool_destroy(vhost->sg_pool); |
| ibmvfc_free_queue(vhost, async_q); |
| LEAVE; |
| } |
| |
| /** |
| * ibmvfc_alloc_mem - Allocate memory for vhost |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * 0 on success / non-zero on failure |
| **/ |
| static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_queue *async_q = &vhost->async_crq; |
| struct device *dev = vhost->dev; |
| |
| ENTER; |
| if (ibmvfc_alloc_queue(vhost, async_q, IBMVFC_ASYNC_FMT)) { |
| dev_err(dev, "Couldn't allocate/map async queue.\n"); |
| goto nomem; |
| } |
| |
| vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, |
| SG_ALL * sizeof(struct srp_direct_buf), |
| sizeof(struct srp_direct_buf), 0); |
| |
| if (!vhost->sg_pool) { |
| dev_err(dev, "Failed to allocate sg pool\n"); |
| goto unmap_async_crq; |
| } |
| |
| vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), |
| &vhost->login_buf_dma, GFP_KERNEL); |
| |
| if (!vhost->login_buf) { |
| dev_err(dev, "Couldn't allocate NPIV login buffer\n"); |
| goto free_sg_pool; |
| } |
| |
| vhost->disc_buf_sz = sizeof(*vhost->disc_buf) * max_targets; |
| vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, |
| &vhost->disc_buf_dma, GFP_KERNEL); |
| |
| if (!vhost->disc_buf) { |
| dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); |
| goto free_login_buffer; |
| } |
| |
| vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, |
| sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); |
| atomic_set(&vhost->trace_index, -1); |
| |
| if (!vhost->trace) |
| goto free_disc_buffer; |
| |
| vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, |
| sizeof(struct ibmvfc_target)); |
| |
| if (!vhost->tgt_pool) { |
| dev_err(dev, "Couldn't allocate target memory pool\n"); |
| goto free_trace; |
| } |
| |
| vhost->channel_setup_buf = dma_alloc_coherent(dev, sizeof(*vhost->channel_setup_buf), |
| &vhost->channel_setup_dma, |
| GFP_KERNEL); |
| |
| if (!vhost->channel_setup_buf) { |
| dev_err(dev, "Couldn't allocate Channel Setup buffer\n"); |
| goto free_tgt_pool; |
| } |
| |
| LEAVE; |
| return 0; |
| |
| free_tgt_pool: |
| mempool_destroy(vhost->tgt_pool); |
| free_trace: |
| kfree(vhost->trace); |
| free_disc_buffer: |
| dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, |
| vhost->disc_buf_dma); |
| free_login_buffer: |
| dma_free_coherent(dev, sizeof(*vhost->login_buf), |
| vhost->login_buf, vhost->login_buf_dma); |
| free_sg_pool: |
| dma_pool_destroy(vhost->sg_pool); |
| unmap_async_crq: |
| ibmvfc_free_queue(vhost, async_q); |
| nomem: |
| LEAVE; |
| return -ENOMEM; |
| } |
| |
| /** |
| * ibmvfc_rport_add_thread - Worker thread for rport adds |
| * @work: work struct |
| * |
| **/ |
| static void ibmvfc_rport_add_thread(struct work_struct *work) |
| { |
| struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, |
| rport_add_work_q); |
| struct ibmvfc_target *tgt; |
| struct fc_rport *rport; |
| unsigned long flags; |
| int did_work; |
| |
| ENTER; |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| do { |
| did_work = 0; |
| if (vhost->state != IBMVFC_ACTIVE) |
| break; |
| |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->add_rport) { |
| did_work = 1; |
| tgt->add_rport = 0; |
| kref_get(&tgt->kref); |
| rport = tgt->rport; |
| if (!rport) { |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| ibmvfc_tgt_add_rport(tgt); |
| } else if (get_device(&rport->dev)) { |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| tgt_dbg(tgt, "Setting rport roles\n"); |
| fc_remote_port_rolechg(rport, tgt->ids.roles); |
| put_device(&rport->dev); |
| } else { |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| } |
| |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| break; |
| } |
| } |
| } while(did_work); |
| |
| if (vhost->state == IBMVFC_ACTIVE) |
| vhost->scan_complete = 1; |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| LEAVE; |
| } |
| |
| /** |
| * ibmvfc_probe - Adapter hot plug add entry point |
| * @vdev: vio device struct |
| * @id: vio device id struct |
| * |
| * Return value: |
| * 0 on success / non-zero on failure |
| **/ |
| static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) |
| { |
| struct ibmvfc_host *vhost; |
| struct Scsi_Host *shost; |
| struct device *dev = &vdev->dev; |
| int rc = -ENOMEM; |
| unsigned int max_scsi_queues = IBMVFC_MAX_SCSI_QUEUES; |
| |
| ENTER; |
| shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); |
| if (!shost) { |
| dev_err(dev, "Couldn't allocate host data\n"); |
| goto out; |
| } |
| |
| shost->transportt = ibmvfc_transport_template; |
| shost->can_queue = max_requests; |
| shost->max_lun = max_lun; |
| shost->max_id = max_targets; |
| shost->max_sectors = IBMVFC_MAX_SECTORS; |
| shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; |
| shost->unique_id = shost->host_no; |
| shost->nr_hw_queues = mq_enabled ? min(max_scsi_queues, nr_scsi_hw_queues) : 1; |
| |
| vhost = shost_priv(shost); |
| INIT_LIST_HEAD(&vhost->targets); |
| INIT_LIST_HEAD(&vhost->purge); |
| sprintf(vhost->name, IBMVFC_NAME); |
| vhost->host = shost; |
| vhost->dev = dev; |
| vhost->partition_number = -1; |
| vhost->log_level = log_level; |
| vhost->task_set = 1; |
| |
| vhost->mq_enabled = mq_enabled; |
| vhost->client_scsi_channels = min(shost->nr_hw_queues, nr_scsi_channels); |
| vhost->using_channels = 0; |
| vhost->do_enquiry = 1; |
| vhost->scan_timeout = 0; |
| |
| strcpy(vhost->partition_name, "UNKNOWN"); |
| init_waitqueue_head(&vhost->work_wait_q); |
| init_waitqueue_head(&vhost->init_wait_q); |
| INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); |
| mutex_init(&vhost->passthru_mutex); |
| |
| if ((rc = ibmvfc_alloc_mem(vhost))) |
| goto free_scsi_host; |
| |
| vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, |
| shost->host_no); |
| |
| if (IS_ERR(vhost->work_thread)) { |
| dev_err(dev, "Couldn't create kernel thread: %ld\n", |
| PTR_ERR(vhost->work_thread)); |
| rc = PTR_ERR(vhost->work_thread); |
| goto free_host_mem; |
| } |
| |
| if ((rc = ibmvfc_init_crq(vhost))) { |
| dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); |
| goto kill_kthread; |
| } |
| |
| if ((rc = scsi_add_host(shost, dev))) |
| goto release_crq; |
| |
| fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; |
| |
| if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, |
| &ibmvfc_trace_attr))) { |
| dev_err(dev, "Failed to create trace file. rc=%d\n", rc); |
| goto remove_shost; |
| } |
| |
| ibmvfc_init_sub_crqs(vhost); |
| |
| if (shost_to_fc_host(shost)->rqst_q) |
| blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); |
| dev_set_drvdata(dev, vhost); |
| spin_lock(&ibmvfc_driver_lock); |
| list_add_tail(&vhost->queue, &ibmvfc_head); |
| spin_unlock(&ibmvfc_driver_lock); |
| |
| ibmvfc_send_crq_init(vhost); |
| scsi_scan_host(shost); |
| return 0; |
| |
| remove_shost: |
| scsi_remove_host(shost); |
| release_crq: |
| ibmvfc_release_crq_queue(vhost); |
| kill_kthread: |
| kthread_stop(vhost->work_thread); |
| free_host_mem: |
| ibmvfc_free_mem(vhost); |
| free_scsi_host: |
| scsi_host_put(shost); |
| out: |
| LEAVE; |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_remove - Adapter hot plug remove entry point |
| * @vdev: vio device struct |
| * |
| * Return value: |
| * 0 |
| **/ |
| static void ibmvfc_remove(struct vio_dev *vdev) |
| { |
| struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); |
| LIST_HEAD(purge); |
| unsigned long flags; |
| |
| ENTER; |
| ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| ibmvfc_wait_while_resetting(vhost); |
| kthread_stop(vhost->work_thread); |
| fc_remove_host(vhost->host); |
| scsi_remove_host(vhost->host); |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| ibmvfc_purge_requests(vhost, DID_ERROR); |
| list_splice_init(&vhost->purge, &purge); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| ibmvfc_complete_purge(&purge); |
| ibmvfc_release_sub_crqs(vhost); |
| ibmvfc_release_crq_queue(vhost); |
| |
| ibmvfc_free_mem(vhost); |
| spin_lock(&ibmvfc_driver_lock); |
| list_del(&vhost->queue); |
| spin_unlock(&ibmvfc_driver_lock); |
| scsi_host_put(vhost->host); |
| LEAVE; |
| } |
| |
| /** |
| * ibmvfc_resume - Resume from suspend |
| * @dev: device struct |
| * |
| * We may have lost an interrupt across suspend/resume, so kick the |
| * interrupt handler |
| * |
| */ |
| static int ibmvfc_resume(struct device *dev) |
| { |
| unsigned long flags; |
| struct ibmvfc_host *vhost = dev_get_drvdata(dev); |
| struct vio_dev *vdev = to_vio_dev(dev); |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| vio_disable_interrupts(vdev); |
| tasklet_schedule(&vhost->tasklet); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver |
| * @vdev: vio device struct |
| * |
| * Return value: |
| * Number of bytes the driver will need to DMA map at the same time in |
| * order to perform well. |
| */ |
| static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) |
| { |
| unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); |
| return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); |
| } |
| |
| static const struct vio_device_id ibmvfc_device_table[] = { |
| {"fcp", "IBM,vfc-client"}, |
| { "", "" } |
| }; |
| MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); |
| |
| static const struct dev_pm_ops ibmvfc_pm_ops = { |
| .resume = ibmvfc_resume |
| }; |
| |
| static struct vio_driver ibmvfc_driver = { |
| .id_table = ibmvfc_device_table, |
| .probe = ibmvfc_probe, |
| .remove = ibmvfc_remove, |
| .get_desired_dma = ibmvfc_get_desired_dma, |
| .name = IBMVFC_NAME, |
| .pm = &ibmvfc_pm_ops, |
| }; |
| |
| static struct fc_function_template ibmvfc_transport_functions = { |
| .show_host_fabric_name = 1, |
| .show_host_node_name = 1, |
| .show_host_port_name = 1, |
| .show_host_supported_classes = 1, |
| .show_host_port_type = 1, |
| .show_host_port_id = 1, |
| .show_host_maxframe_size = 1, |
| |
| .get_host_port_state = ibmvfc_get_host_port_state, |
| .show_host_port_state = 1, |
| |
| .get_host_speed = ibmvfc_get_host_speed, |
| .show_host_speed = 1, |
| |
| .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, |
| .terminate_rport_io = ibmvfc_terminate_rport_io, |
| |
| .show_rport_maxframe_size = 1, |
| .show_rport_supported_classes = 1, |
| |
| .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, |
| .show_rport_dev_loss_tmo = 1, |
| |
| .get_starget_node_name = ibmvfc_get_starget_node_name, |
| .show_starget_node_name = 1, |
| |
| .get_starget_port_name = ibmvfc_get_starget_port_name, |
| .show_starget_port_name = 1, |
| |
| .get_starget_port_id = ibmvfc_get_starget_port_id, |
| .show_starget_port_id = 1, |
| |
| .bsg_request = ibmvfc_bsg_request, |
| .bsg_timeout = ibmvfc_bsg_timeout, |
| }; |
| |
| /** |
| * ibmvfc_module_init - Initialize the ibmvfc module |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int __init ibmvfc_module_init(void) |
| { |
| int rc; |
| |
| if (!firmware_has_feature(FW_FEATURE_VIO)) |
| return -ENODEV; |
| |
| printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", |
| IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); |
| |
| ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); |
| if (!ibmvfc_transport_template) |
| return -ENOMEM; |
| |
| rc = vio_register_driver(&ibmvfc_driver); |
| if (rc) |
| fc_release_transport(ibmvfc_transport_template); |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_module_exit - Teardown the ibmvfc module |
| * |
| * Return value: |
| * nothing |
| **/ |
| static void __exit ibmvfc_module_exit(void) |
| { |
| vio_unregister_driver(&ibmvfc_driver); |
| fc_release_transport(ibmvfc_transport_template); |
| } |
| |
| module_init(ibmvfc_module_init); |
| module_exit(ibmvfc_module_exit); |