diff options
Diffstat (limited to 'drivers/s390/scsi/zfcp_dbf.c')
| -rw-r--r-- | drivers/s390/scsi/zfcp_dbf.c | 995 |
1 files changed, 995 insertions, 0 deletions
diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c new file mode 100644 index 00000000000..826fb3b0060 --- /dev/null +++ b/drivers/s390/scsi/zfcp_dbf.c @@ -0,0 +1,995 @@ +/* + * + * linux/drivers/s390/scsi/zfcp_dbf.c + * + * FCP adapter driver for IBM eServer zSeries + * + * Debugging facilities + * + * (C) Copyright IBM Corp. 2005 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#define ZFCP_DBF_REVISION "$Revision$" + +#include <asm/debug.h> +#include <linux/ctype.h> +#include "zfcp_ext.h" + +static u32 dbfsize = 4; + +module_param(dbfsize, uint, 0400); +MODULE_PARM_DESC(dbfsize, + "number of pages for each debug feature area (default 4)"); + +#define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER + +static inline int +zfcp_dbf_stck(char *out_buf, const char *label, unsigned long long stck) +{ + unsigned long long sec; + struct timespec xtime; + int len = 0; + + stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096); + sec = stck >> 12; + do_div(sec, 1000000); + xtime.tv_sec = sec; + stck -= (sec * 1000000) << 12; + xtime.tv_nsec = ((stck * 1000) >> 12); + len += sprintf(out_buf + len, "%-24s%011lu:%06lu\n", + label, xtime.tv_sec, xtime.tv_nsec); + + return len; +} + +static int zfcp_dbf_tag(char *out_buf, const char *label, const char *tag) +{ + int len = 0, i; + + len += sprintf(out_buf + len, "%-24s", label); + for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++) + len += sprintf(out_buf + len, "%c", tag[i]); + len += sprintf(out_buf + len, "\n"); + + return len; +} + +static int +zfcp_dbf_view(char *out_buf, const char *label, const char *format, ...) +{ + va_list arg; + int len = 0; + + len += sprintf(out_buf + len, "%-24s", label); + va_start(arg, format); + len += vsprintf(out_buf + len, format, arg); + va_end(arg); + len += sprintf(out_buf + len, "\n"); + + return len; +} + +static int +zfcp_dbf_view_dump(char *out_buf, const char *label, + char *buffer, int buflen, int offset, int total_size) +{ + int len = 0; + + if (offset == 0) + len += sprintf(out_buf + len, "%-24s ", label); + + while (buflen--) { + if (offset > 0) { + if ((offset % 32) == 0) + len += sprintf(out_buf + len, "\n%-24c ", ' '); + else if ((offset % 4) == 0) + len += sprintf(out_buf + len, " "); + } + len += sprintf(out_buf + len, "%02x", *buffer++); + if (++offset == total_size) { + len += sprintf(out_buf + len, "\n"); + break; + } + } + + if (total_size == 0) + len += sprintf(out_buf + len, "\n"); + + return len; +} + +static inline int +zfcp_dbf_view_header(debug_info_t * id, struct debug_view *view, int area, + debug_entry_t * entry, char *out_buf) +{ + struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry); + int len = 0; + + if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) { + len += zfcp_dbf_stck(out_buf + len, "timestamp", + entry->id.stck); + len += zfcp_dbf_view(out_buf + len, "cpu", "%02i", + entry->id.fields.cpuid); + } else { + len += zfcp_dbf_view_dump(out_buf + len, NULL, + dump->data, + dump->size, + dump->offset, dump->total_size); + if ((dump->offset + dump->size) == dump->total_size) + len += sprintf(out_buf + len, "\n"); + } + + return len; +} + +inline void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req) +{ + struct zfcp_adapter *adapter = fsf_req->adapter; + struct fsf_qtcb *qtcb = fsf_req->qtcb; + union fsf_prot_status_qual *prot_status_qual = + &qtcb->prefix.prot_status_qual; + union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual; + struct scsi_cmnd *scsi_cmnd; + struct zfcp_port *port; + struct zfcp_unit *unit; + struct zfcp_send_els *send_els; + struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf; + struct zfcp_hba_dbf_record_response *response = &rec->type.response; + int level; + unsigned long flags; + + spin_lock_irqsave(&adapter->hba_dbf_lock, flags); + memset(rec, 0, sizeof(struct zfcp_hba_dbf_record)); + strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE); + + if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) && + (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) { + strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE); + level = 1; + } else if (qtcb->header.fsf_status != FSF_GOOD) { + strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE); + level = 1; + } else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) || + (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) { + strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE); + level = 4; + } else if ((prot_status_qual->doubleword[0] != 0) || + (prot_status_qual->doubleword[1] != 0) || + (fsf_status_qual->doubleword[0] != 0) || + (fsf_status_qual->doubleword[1] != 0)) { + strncpy(rec->tag2, "qual", ZFCP_DBF_TAG_SIZE); + level = 3; + } else { + strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE); + level = 6; + } + + response->fsf_command = fsf_req->fsf_command; + response->fsf_reqid = (unsigned long)fsf_req; + response->fsf_seqno = fsf_req->seq_no; + response->fsf_issued = fsf_req->issued; + response->fsf_prot_status = qtcb->prefix.prot_status; + response->fsf_status = qtcb->header.fsf_status; + memcpy(response->fsf_prot_status_qual, + prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE); + memcpy(response->fsf_status_qual, + fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE); + response->fsf_req_status = fsf_req->status; + response->sbal_first = fsf_req->sbal_first; + response->sbal_curr = fsf_req->sbal_curr; + response->sbal_last = fsf_req->sbal_last; + response->pool = fsf_req->pool != NULL; + response->erp_action = (unsigned long)fsf_req->erp_action; + + switch (fsf_req->fsf_command) { + case FSF_QTCB_FCP_CMND: + if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) + break; + scsi_cmnd = (struct scsi_cmnd *)fsf_req->data; + if (scsi_cmnd != NULL) { + response->data.send_fcp.scsi_cmnd + = (unsigned long)scsi_cmnd; + response->data.send_fcp.scsi_serial + = scsi_cmnd->serial_number; + } + break; + + case FSF_QTCB_OPEN_PORT_WITH_DID: + case FSF_QTCB_CLOSE_PORT: + case FSF_QTCB_CLOSE_PHYSICAL_PORT: + port = (struct zfcp_port *)fsf_req->data; + response->data.port.wwpn = port->wwpn; + response->data.port.d_id = port->d_id; + response->data.port.port_handle = qtcb->header.port_handle; + break; + + case FSF_QTCB_OPEN_LUN: + case FSF_QTCB_CLOSE_LUN: + unit = (struct zfcp_unit *)fsf_req->data; + port = unit->port; + response->data.unit.wwpn = port->wwpn; + response->data.unit.fcp_lun = unit->fcp_lun; + response->data.unit.port_handle = qtcb->header.port_handle; + response->data.unit.lun_handle = qtcb->header.lun_handle; + break; + + case FSF_QTCB_SEND_ELS: + send_els = (struct zfcp_send_els *)fsf_req->data; + response->data.send_els.d_id = qtcb->bottom.support.d_id; + response->data.send_els.ls_code = send_els->ls_code >> 24; + break; + + case FSF_QTCB_ABORT_FCP_CMND: + case FSF_QTCB_SEND_GENERIC: + case FSF_QTCB_EXCHANGE_CONFIG_DATA: + case FSF_QTCB_EXCHANGE_PORT_DATA: + case FSF_QTCB_DOWNLOAD_CONTROL_FILE: + case FSF_QTCB_UPLOAD_CONTROL_FILE: + break; + } + + debug_event(adapter->hba_dbf, level, + rec, sizeof(struct zfcp_hba_dbf_record)); + spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags); +} + +inline void +zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter, + struct fsf_status_read_buffer *status_buffer) +{ + struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf; + unsigned long flags; + + spin_lock_irqsave(&adapter->hba_dbf_lock, flags); + memset(rec, 0, sizeof(struct zfcp_hba_dbf_record)); + strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE); + strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE); + + rec->type.status.failed = adapter->status_read_failed; + if (status_buffer != NULL) { + rec->type.status.status_type = status_buffer->status_type; + rec->type.status.status_subtype = status_buffer->status_subtype; + memcpy(&rec->type.status.queue_designator, + &status_buffer->queue_designator, + sizeof(struct fsf_queue_designator)); + + switch (status_buffer->status_type) { + case FSF_STATUS_READ_SENSE_DATA_AVAIL: + rec->type.status.payload_size = + ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL; + break; + + case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: + rec->type.status.payload_size = + ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD; + break; + + case FSF_STATUS_READ_LINK_DOWN: + switch (status_buffer->status_subtype) { + case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK: + case FSF_STATUS_READ_SUB_FDISC_FAILED: + rec->type.status.payload_size = + sizeof(struct fsf_link_down_info); + } + break; + + case FSF_STATUS_READ_FEATURE_UPDATE_ALERT: + rec->type.status.payload_size = + ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT; + break; + } + memcpy(&rec->type.status.payload, + &status_buffer->payload, rec->type.status.payload_size); + } + + debug_event(adapter->hba_dbf, 2, + rec, sizeof(struct zfcp_hba_dbf_record)); + spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags); +} + +inline void +zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status, + unsigned int qdio_error, unsigned int siga_error, + int sbal_index, int sbal_count) +{ + struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf; + unsigned long flags; + + spin_lock_irqsave(&adapter->hba_dbf_lock, flags); + memset(rec, 0, sizeof(struct zfcp_hba_dbf_record)); + strncpy(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE); + rec->type.qdio.status = status; + rec->type.qdio.qdio_error = qdio_error; + rec->type.qdio.siga_error = siga_error; + rec->type.qdio.sbal_index = sbal_index; + rec->type.qdio.sbal_count = sbal_count; + debug_event(adapter->hba_dbf, 0, + rec, sizeof(struct zfcp_hba_dbf_record)); + spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags); +} + +static inline int +zfcp_hba_dbf_view_response(char *out_buf, + struct zfcp_hba_dbf_record_response *rec) +{ + int len = 0; + + len += zfcp_dbf_view(out_buf + len, "fsf_command", "0x%08x", + rec->fsf_command); + len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx", + rec->fsf_reqid); + len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x", + rec->fsf_seqno); + len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued); + len += zfcp_dbf_view(out_buf + len, "fsf_prot_status", "0x%08x", + rec->fsf_prot_status); + len += zfcp_dbf_view(out_buf + len, "fsf_status", "0x%08x", + rec->fsf_status); + len += zfcp_dbf_view_dump(out_buf + len, "fsf_prot_status_qual", + rec->fsf_prot_status_qual, + FSF_PROT_STATUS_QUAL_SIZE, + 0, FSF_PROT_STATUS_QUAL_SIZE); + len += zfcp_dbf_view_dump(out_buf + len, "fsf_status_qual", + rec->fsf_status_qual, + FSF_STATUS_QUALIFIER_SIZE, + 0, FSF_STATUS_QUALIFIER_SIZE); + len += zfcp_dbf_view(out_buf + len, "fsf_req_status", "0x%08x", + rec->fsf_req_status); + len += zfcp_dbf_view(out_buf + len, "sbal_first", "0x%02x", + rec->sbal_first); + len += zfcp_dbf_view(out_buf + len, "sbal_curr", "0x%02x", + rec->sbal_curr); + len += zfcp_dbf_view(out_buf + len, "sbal_last", "0x%02x", + rec->sbal_last); + len += zfcp_dbf_view(out_buf + len, "pool", "0x%02x", rec->pool); + + switch (rec->fsf_command) { + case FSF_QTCB_FCP_CMND: + if (rec->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) + break; + len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx", + rec->data.send_fcp.scsi_cmnd); + len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx", + rec->data.send_fcp.scsi_serial); + break; + + case FSF_QTCB_OPEN_PORT_WITH_DID: + case FSF_QTCB_CLOSE_PORT: + case FSF_QTCB_CLOSE_PHYSICAL_PORT: + len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx", + rec->data.port.wwpn); + len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x", + rec->data.port.d_id); + len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x", + rec->data.port.port_handle); + break; + + case FSF_QTCB_OPEN_LUN: + case FSF_QTCB_CLOSE_LUN: + len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx", + rec->data.unit.wwpn); + len += zfcp_dbf_view(out_buf + len, "fcp_lun", "0x%016Lx", + rec->data.unit.fcp_lun); + len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x", + rec->data.unit.port_handle); + len += zfcp_dbf_view(out_buf + len, "lun_handle", "0x%08x", + rec->data.unit.lun_handle); + break; + + case FSF_QTCB_SEND_ELS: + len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x", + rec->data.send_els.d_id); + len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x", + rec->data.send_els.ls_code); + break; + + case FSF_QTCB_ABORT_FCP_CMND: + case FSF_QTCB_SEND_GENERIC: + case FSF_QTCB_EXCHANGE_CONFIG_DATA: + case FSF_QTCB_EXCHANGE_PORT_DATA: + case FSF_QTCB_DOWNLOAD_CONTROL_FILE: + case FSF_QTCB_UPLOAD_CONTROL_FILE: + break; + } + + return len; +} + +static inline int +zfcp_hba_dbf_view_status(char *out_buf, struct zfcp_hba_dbf_record_status *rec) +{ + int len = 0; + + len += zfcp_dbf_view(out_buf + len, "failed", "0x%02x", rec->failed); + len += zfcp_dbf_view(out_buf + len, "status_type", "0x%08x", + rec->status_type); + len += zfcp_dbf_view(out_buf + len, "status_subtype", "0x%08x", + rec->status_subtype); + len += zfcp_dbf_view_dump(out_buf + len, "queue_designator", + (char *)&rec->queue_designator, + sizeof(struct fsf_queue_designator), + 0, sizeof(struct fsf_queue_designator)); + len += zfcp_dbf_view_dump(out_buf + len, "payload", + (char *)&rec->payload, + rec->payload_size, 0, rec->payload_size); + + return len; +} + +static inline int +zfcp_hba_dbf_view_qdio(char *out_buf, struct zfcp_hba_dbf_record_qdio *rec) +{ + int len = 0; + + len += zfcp_dbf_view(out_buf + len, "status", "0x%08x", rec->status); + len += zfcp_dbf_view(out_buf + len, "qdio_error", "0x%08x", + rec->qdio_error); + len += zfcp_dbf_view(out_buf + len, "siga_error", "0x%08x", + rec->siga_error); + len += zfcp_dbf_view(out_buf + len, "sbal_index", "0x%02x", + rec->sbal_index); + len += zfcp_dbf_view(out_buf + len, "sbal_count", "0x%02x", + rec->sbal_count); + + return len; +} + +static int +zfcp_hba_dbf_view_format(debug_info_t * id, struct debug_view *view, + char *out_buf, const char *in_buf) +{ + struct zfcp_hba_dbf_record *rec = (struct zfcp_hba_dbf_record *)in_buf; + int len = 0; + + if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0) + return 0; + + len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag); + if (isalpha(rec->tag2[0])) + len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2); + if (strncmp(rec->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0) + len += zfcp_hba_dbf_view_response(out_buf + len, + &rec->type.response); + else if (strncmp(rec->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0) + len += zfcp_hba_dbf_view_status(out_buf + len, + &rec->type.status); + else if (strncmp(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0) + len += zfcp_hba_dbf_view_qdio(out_buf + len, &rec->type.qdio); + + len += sprintf(out_buf + len, "\n"); + + return len; +} + +struct debug_view zfcp_hba_dbf_view = { + "structured", + NULL, + &zfcp_dbf_view_header, + &zfcp_hba_dbf_view_format, + NULL, + NULL +}; + +inline void +_zfcp_san_dbf_event_common_ct(const char *tag, struct zfcp_fsf_req *fsf_req, + u32 s_id, u32 d_id, void *buffer, int buflen) +{ + struct zfcp_send_ct *send_ct = (struct zfcp_send_ct *)fsf_req->data; + struct zfcp_port *port = send_ct->port; + struct zfcp_adapter *adapter = port->adapter; + struct ct_hdr *header = (struct ct_hdr *)buffer; + struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf; + struct zfcp_san_dbf_record_ct *ct = &rec->type.ct; + unsigned long flags; + + spin_lock_irqsave(&adapter->san_dbf_lock, flags); + memset(rec, 0, sizeof(struct zfcp_san_dbf_record)); + strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE); + rec->fsf_reqid = (unsigned long)fsf_req; + rec->fsf_seqno = fsf_req->seq_no; + rec->s_id = s_id; + rec->d_id = d_id; + if (strncmp(tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) { + ct->type.request.cmd_req_code = header->cmd_rsp_code; + ct->type.request.revision = header->revision; + ct->type.request.gs_type = header->gs_type; + ct->type.request.gs_subtype = header->gs_subtype; + ct->type.request.options = header->options; + ct->type.request.max_res_size = header->max_res_size; + } else if (strncmp(tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) { + ct->type.response.cmd_rsp_code = header->cmd_rsp_code; + ct->type.response.revision = header->revision; + ct->type.response.reason_code = header->reason_code; + ct->type.response.reason_code_expl = header->reason_code_expl; + ct->type.response.vendor_unique = header->vendor_unique; + } + ct->payload_size = + min(buflen - (int)sizeof(struct ct_hdr), ZFCP_DBF_CT_PAYLOAD); + memcpy(ct->payload, buffer + sizeof(struct ct_hdr), ct->payload_size); + debug_event(adapter->san_dbf, 3, + rec, sizeof(struct zfcp_san_dbf_record)); + spin_unlock_irqrestore(&adapter->san_dbf_lock, flags); +} + +inline void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req) +{ + struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data; + struct zfcp_port *port = ct->port; + struct zfcp_adapter *adapter = port->adapter; + + _zfcp_san_dbf_event_common_ct("octc", fsf_req, + fc_host_port_id(adapter->scsi_host), + port->d_id, zfcp_sg_to_address(ct->req), + ct->req->length); +} + +inline void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req) +{ + struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data; + struct zfcp_port *port = ct->port; + struct zfcp_adapter *adapter = port->adapter; + + _zfcp_san_dbf_event_common_ct("rctc", fsf_req, port->d_id, + fc_host_port_id(adapter->scsi_host), + zfcp_sg_to_address(ct->resp), + ct->resp->length); +} + +static inline void +_zfcp_san_dbf_event_common_els(const char *tag, int level, + struct zfcp_fsf_req *fsf_req, u32 s_id, + u32 d_id, u8 ls_code, void *buffer, int buflen) +{ + struct zfcp_adapter *adapter = fsf_req->adapter; + struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf; + struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec; + unsigned long flags; + int offset = 0; + + spin_lock_irqsave(&adapter->san_dbf_lock, flags); + do { + memset(rec, 0, sizeof(struct zfcp_san_dbf_record)); + if (offset == 0) { + strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE); + rec->fsf_reqid = (unsigned long)fsf_req; + rec->fsf_seqno = fsf_req->seq_no; + rec->s_id = s_id; + rec->d_id = d_id; + rec->type.els.ls_code = ls_code; + buflen = min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD); + rec->type.els.payload_size = buflen; + memcpy(rec->type.els.payload, + buffer, min(buflen, ZFCP_DBF_ELS_PAYLOAD)); + offset += min(buflen, ZFCP_DBF_ELS_PAYLOAD); + } else { + strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE); + dump->total_size = buflen; + dump->offset = offset; + dump->size = min(buflen - offset, + (int)sizeof(struct zfcp_san_dbf_record) + - (int)sizeof(struct zfcp_dbf_dump)); + memcpy(dump->data, buffer + offset, dump->size); + offset += dump->size; + } + debug_event(adapter->san_dbf, level, + rec, sizeof(struct zfcp_san_dbf_record)); + } while (offset < buflen); + spin_unlock_irqrestore(&adapter->san_dbf_lock, flags); +} + +inline void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req) +{ + struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data; + + _zfcp_san_dbf_event_common_els("oels", 2, fsf_req, + fc_host_port_id(els->adapter->scsi_host), + els->d_id, + *(u8 *) zfcp_sg_to_address(els->req), + zfcp_sg_to_address(els->req), + els->req->length); +} + +inline void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req) +{ + struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data; + + _zfcp_san_dbf_event_common_els("rels", 2, fsf_req, els->d_id, + fc_host_port_id(els->adapter->scsi_host), + *(u8 *) zfcp_sg_to_address(els->req), + zfcp_sg_to_address(els->resp), + els->resp->length); +} + +inline void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req) +{ + struct zfcp_adapter *adapter = fsf_req->adapter; + struct fsf_status_read_buffer *status_buffer = + (struct fsf_status_read_buffer *)fsf_req->data; + int length = (int)status_buffer->length - + (int)((void *)&status_buffer->payload - (void *)status_buffer); + + _zfcp_san_dbf_event_common_els("iels", 1, fsf_req, status_buffer->d_id, + fc_host_port_id(adapter->scsi_host), + *(u8 *) status_buffer->payload, + (void *)status_buffer->payload, length); +} + +static int +zfcp_san_dbf_view_format(debug_info_t * id, struct debug_view *view, + char *out_buf, const char *in_buf) +{ + struct zfcp_san_dbf_record *rec = (struct zfcp_san_dbf_record *)in_buf; + char *buffer = NULL; + int buflen = 0, total = 0; + int len = 0; + + if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0) + return 0; + + len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag); + len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx", + rec->fsf_reqid); + len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x", + rec->fsf_seqno); + len += zfcp_dbf_view(out_buf + len, "s_id", "0x%06x", rec->s_id); + len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x", rec->d_id); + + if (strncmp(rec->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) { + len += zfcp_dbf_view(out_buf + len, "cmd_req_code", "0x%04x", + rec->type.ct.type.request.cmd_req_code); + len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x", + rec->type.ct.type.request.revision); + len += zfcp_dbf_view(out_buf + len, "gs_type", "0x%02x", + rec->type.ct.type.request.gs_type); + len += zfcp_dbf_view(out_buf + len, "gs_subtype", "0x%02x", + rec->type.ct.type.request.gs_subtype); + len += zfcp_dbf_view(out_buf + len, "options", "0x%02x", + rec->type.ct.type.request.options); + len += zfcp_dbf_view(out_buf + len, "max_res_size", "0x%04x", + rec->type.ct.type.request.max_res_size); + total = rec->type.ct.payload_size; + buffer = rec->type.ct.payload; + buflen = min(total, ZFCP_DBF_CT_PAYLOAD); + } else if (strncmp(rec->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) { + len += zfcp_dbf_view(out_buf + len, "cmd_rsp_code", "0x%04x", + rec->type.ct.type.response.cmd_rsp_code); + len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x", + rec->type.ct.type.response.revision); + len += zfcp_dbf_view(out_buf + len, "reason_code", "0x%02x", + rec->type.ct.type.response.reason_code); + len += + zfcp_dbf_view(out_buf + len, "reason_code_expl", "0x%02x", + rec->type.ct.type.response.reason_code_expl); + len += + zfcp_dbf_view(out_buf + len, "vendor_unique", "0x%02x", + rec->type.ct.type.response.vendor_unique); + total = rec->type.ct.payload_size; + buffer = rec->type.ct.payload; + buflen = min(total, ZFCP_DBF_CT_PAYLOAD); + } else if (strncmp(rec->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 || + strncmp(rec->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 || + strncmp(rec->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) { + len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x", + rec->type.els.ls_code); + total = rec->type.els.payload_size; + buffer = rec->type.els.payload; + buflen = min(total, ZFCP_DBF_ELS_PAYLOAD); + } + + len += zfcp_dbf_view_dump(out_buf + len, "payload", + buffer, buflen, 0, total); + + if (buflen == total) + len += sprintf(out_buf + len, "\n"); + + return len; +} + +struct debug_view zfcp_san_dbf_view = { + "structured", + NULL, + &zfcp_dbf_view_header, + &zfcp_san_dbf_view_format, + NULL, + NULL +}; + +static inline void +_zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level, + struct zfcp_adapter *adapter, + struct scsi_cmnd *scsi_cmnd, + struct zfcp_fsf_req *new_fsf_req) +{ + struct zfcp_fsf_req *fsf_req = + (struct zfcp_fsf_req *)scsi_cmnd->host_scribble; + struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf; + struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec; + unsigned long flags; + struct fcp_rsp_iu *fcp_rsp; + char *fcp_rsp_info = NULL, *fcp_sns_info = NULL; + int offset = 0, buflen = 0; + + spin_lock_irqsave(&adapter->scsi_dbf_lock, flags); + do { + memset(rec, 0, sizeof(struct zfcp_scsi_dbf_record)); + if (offset == 0) { + strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE); + strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE); + if (scsi_cmnd->device) { + rec->scsi_id = scsi_cmnd->device->id; + rec->scsi_lun = scsi_cmnd->device->lun; + } + rec->scsi_result = scsi_cmnd->result; + rec->scsi_cmnd = (unsigned long)scsi_cmnd; + rec->scsi_serial = scsi_cmnd->serial_number; + memcpy(rec->scsi_opcode, + &scsi_cmnd->cmnd, + min((int)scsi_cmnd->cmd_len, + ZFCP_DBF_SCSI_OPCODE)); + rec->scsi_retries = scsi_cmnd->retries; + rec->scsi_allowed = scsi_cmnd->allowed; + if (fsf_req != NULL) { + fcp_rsp = (struct fcp_rsp_iu *) + &(fsf_req->qtcb->bottom.io.fcp_rsp); + fcp_rsp_info = + zfcp_get_fcp_rsp_info_ptr(fcp_rsp); + fcp_sns_info = + zfcp_get_fcp_sns_info_ptr(fcp_rsp); + + rec->type.fcp.rsp_validity = + fcp_rsp->validity.value; + rec->type.fcp.rsp_scsi_status = + fcp_rsp->scsi_status; + rec->type.fcp.rsp_resid = fcp_rsp->fcp_resid; + if (fcp_rsp->validity.bits.fcp_rsp_len_valid) + rec->type.fcp.rsp_code = + *(fcp_rsp_info + 3); + if (fcp_rsp->validity.bits.fcp_sns_len_valid) { + buflen = min((int)fcp_rsp->fcp_sns_len, + ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO); + rec->type.fcp.sns_info_len = buflen; + memcpy(rec->type.fcp.sns_info, + fcp_sns_info, + min(buflen, + ZFCP_DBF_SCSI_FCP_SNS_INFO)); + offset += min(buflen, + ZFCP_DBF_SCSI_FCP_SNS_INFO); + } + + rec->fsf_reqid = (unsigned long)fsf_req; + rec->fsf_seqno = fsf_req->seq_no; + rec->fsf_issued = fsf_req->issued; + } + if (new_fsf_req != NULL) { + rec->type.new_fsf_req.fsf_reqid = + (unsigned long) + new_fsf_req; + rec->type.new_fsf_req.fsf_seqno = + new_fsf_req->seq_no; + rec->type.new_fsf_req.fsf_issued = + new_fsf_req->issued; + } + } else { + strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE); + dump->total_size = buflen; + dump->offset = offset; + dump->size = min(buflen - offset, + (int)sizeof(struct + zfcp_scsi_dbf_record) - + (int)sizeof(struct zfcp_dbf_dump)); + memcpy(dump->data, fcp_sns_info + offset, dump->size); + offset += dump->size; + } + debug_event(adapter->scsi_dbf, level, + rec, sizeof(struct zfcp_scsi_dbf_record)); + } while (offset < buflen); + spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags); +} + +inline void +zfcp_scsi_dbf_event_result(const char *tag, int level, + struct zfcp_adapter *adapter, + struct scsi_cmnd *scsi_cmnd) +{ + _zfcp_scsi_dbf_event_common("rslt", + tag, level, adapter, scsi_cmnd, NULL); +} + +inline void +zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter, + struct scsi_cmnd *scsi_cmnd, + struct zfcp_fsf_req *new_fsf_req) +{ + _zfcp_scsi_dbf_event_common("abrt", + tag, 1, adapter, scsi_cmnd, new_fsf_req); +} + +inline void +zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag, struct zfcp_unit *unit, + struct scsi_cmnd *scsi_cmnd) +{ + struct zfcp_adapter *adapter = unit->port->adapter; + + _zfcp_scsi_dbf_event_common(flag == FCP_TARGET_RESET ? "trst" : "lrst", + tag, 1, adapter, scsi_cmnd, NULL); +} + +static int +zfcp_scsi_dbf_view_format(debug_info_t * id, struct debug_view *view, + char *out_buf, const char *in_buf) +{ + struct zfcp_scsi_dbf_record *rec = + (struct zfcp_scsi_dbf_record *)in_buf; + int len = 0; + + if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0) + return 0; + + len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag); + len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2); + len += zfcp_dbf_view(out_buf + len, "scsi_id", "0x%08x", rec->scsi_id); + len += zfcp_dbf_view(out_buf + len, "scsi_lun", "0x%08x", + rec->scsi_lun); + len += zfcp_dbf_view(out_buf + len, "scsi_result", "0x%08x", + rec->scsi_result); + len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx", + rec->scsi_cmnd); + len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx", + rec->scsi_serial); + len += zfcp_dbf_view_dump(out_buf + len, "scsi_opcode", + rec->scsi_opcode, + ZFCP_DBF_SCSI_OPCODE, + 0, ZFCP_DBF_SCSI_OPCODE); + len += zfcp_dbf_view(out_buf + len, "scsi_retries", "0x%02x", + rec->scsi_retries); + len += zfcp_dbf_view(out_buf + len, "scsi_allowed", "0x%02x", + rec->scsi_allowed); + len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx", + rec->fsf_reqid); + len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x", + rec->fsf_seqno); + len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued); + if (strncmp(rec->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) { + len += + zfcp_dbf_view(out_buf + len, "fcp_rsp_validity", "0x%02x", + rec->type.fcp.rsp_validity); + len += + zfcp_dbf_view(out_buf + len, "fcp_rsp_scsi_status", + "0x%02x", rec->type.fcp.rsp_scsi_status); + len += + zfcp_dbf_view(out_buf + len, "fcp_rsp_resid", "0x%08x", + rec->type.fcp.rsp_resid); + len += + zfcp_dbf_view(out_buf + len, "fcp_rsp_code", "0x%08x", + rec->type.fcp.rsp_code); + len += + zfcp_dbf_view(out_buf + len, "fcp_sns_info_len", "0x%08x", + rec->type.fcp.sns_info_len); + len += + zfcp_dbf_view_dump(out_buf + len, "fcp_sns_info", + rec->type.fcp.sns_info, + min((int)rec->type.fcp.sns_info_len, + ZFCP_DBF_SCSI_FCP_SNS_INFO), 0, + rec->type.fcp.sns_info_len); + } else if (strncmp(rec->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0) { + len += zfcp_dbf_view(out_buf + len, "fsf_reqid_abort", "0x%0Lx", + rec->type.new_fsf_req.fsf_reqid); + len += zfcp_dbf_view(out_buf + len, "fsf_seqno_abort", "0x%08x", + rec->type.new_fsf_req.fsf_seqno); + len += zfcp_dbf_stck(out_buf + len, "fsf_issued", + rec->type.new_fsf_req.fsf_issued); + } else if ((strncmp(rec->tag, "trst", ZFCP_DBF_TAG_SIZE) == 0) || + (strncmp(rec->tag, "lrst", ZFCP_DBF_TAG_SIZE) == 0)) { + len += zfcp_dbf_view(out_buf + len, "fsf_reqid_reset", "0x%0Lx", + rec->type.new_fsf_req.fsf_reqid); + len += zfcp_dbf_view(out_buf + len, "fsf_seqno_reset", "0x%08x", + rec->type.new_fsf_req.fsf_seqno); + len += zfcp_dbf_stck(out_buf + len, "fsf_issued", + rec->type.new_fsf_req.fsf_issued); + } + + len += sprintf(out_buf + len, "\n"); + + return len; +} + +struct debug_view zfcp_scsi_dbf_view = { + "structured", + NULL, + &zfcp_dbf_view_header, + &zfcp_scsi_dbf_view_format, + NULL, + NULL +}; + +/** + * zfcp_adapter_debug_register - registers debug feature for an adapter + * @adapter: pointer to adapter for which debug features should be registered + * return: -ENOMEM on error, 0 otherwise + */ +int zfcp_adapter_debug_register(struct zfcp_adapter *adapter) +{ + char dbf_name[DEBUG_MAX_NAME_LEN]; + + /* debug feature area which records recovery activity */ + spin_lock_init(&adapter->erp_dbf_lock); + sprintf(dbf_name, "zfcp_%s_erp", zfcp_get_busid_by_adapter(adapter)); + adapter->erp_dbf = debug_register(dbf_name, dbfsize, 2, + sizeof(struct zfcp_erp_dbf_record)); + if (!adapter->erp_dbf) + goto failed; + debug_register_view(adapter->erp_dbf, &debug_hex_ascii_view); + debug_set_level(adapter->erp_dbf, 3); + + /* debug feature area which records HBA (FSF and QDIO) conditions */ + spin_lock_init(&adapter->hba_dbf_lock); + sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter)); + adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1, + sizeof(struct zfcp_hba_dbf_record)); + if (!adapter->hba_dbf) + goto failed; + debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view); + debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view); + debug_set_level(adapter->hba_dbf, 3); + + /* debug feature area which records SAN command failures and recovery */ + spin_lock_init(&adapter->san_dbf_lock); + sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter)); + adapter->san_dbf = debug_register(dbf_name, dbfsize, 1, + sizeof(struct zfcp_san_dbf_record)); + if (!adapter->san_dbf) + goto failed; + debug_register_view(adapter->san_dbf, &debug_hex_ascii_view); + debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view); + debug_set_level(adapter->san_dbf, 6); + + /* debug feature area which records SCSI command failures and recovery */ + spin_lock_init(&adapter->scsi_dbf_lock); + sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter)); + adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1, + sizeof(struct zfcp_scsi_dbf_record)); + if (!adapter->scsi_dbf) + goto failed; + debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view); + debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view); + debug_set_level(adapter->scsi_dbf, 3); + + return 0; + + failed: + zfcp_adapter_debug_unregister(adapter); + + return -ENOMEM; +} + +/** + * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter + * @adapter: pointer to adapter for which debug features should be unregistered + */ +void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter) +{ + debug_unregister(adapter->scsi_dbf); + debug_unregister(adapter->san_dbf); + debug_unregister(adapter->hba_dbf); + debug_unregister(adapter->erp_dbf); + adapter->scsi_dbf = NULL; + adapter->san_dbf = NULL; + adapter->hba_dbf = NULL; + adapter->erp_dbf = NULL; +} + +#undef ZFCP_LOG_AREA |