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[SCSI] lpfc 8.1.7 : Add statistics reset callback for FC transport
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Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
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James Smart authored and James Bottomley committed Aug 6, 2006
1 parent 0dfda77 commit 64ba881
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Showing 3 changed files with 103 additions and 4 deletions.
90 changes: 86 additions & 4 deletions drivers/scsi/lpfc/lpfc_attr.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1210,8 +1210,10 @@ lpfc_get_stats(struct Scsi_Host *shost)
struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
struct lpfc_sli *psli = &phba->sli;
struct fc_host_statistics *hs = &phba->link_stats;
struct lpfc_lnk_stat * lso = &psli->lnk_stat_offsets;
LPFC_MBOXQ_t *pmboxq;
MAILBOX_t *pmb;
unsigned long seconds;
int rc = 0;

pmboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
Expand Down Expand Up @@ -1272,22 +1274,103 @@ lpfc_get_stats(struct Scsi_Host *shost)
hs->invalid_crc_count = pmb->un.varRdLnk.crcCnt;
hs->error_frames = pmb->un.varRdLnk.crcCnt;

hs->link_failure_count -= lso->link_failure_count;
hs->loss_of_sync_count -= lso->loss_of_sync_count;
hs->loss_of_signal_count -= lso->loss_of_signal_count;
hs->prim_seq_protocol_err_count -= lso->prim_seq_protocol_err_count;
hs->invalid_tx_word_count -= lso->invalid_tx_word_count;
hs->invalid_crc_count -= lso->invalid_crc_count;
hs->error_frames -= lso->error_frames;

if (phba->fc_topology == TOPOLOGY_LOOP) {
hs->lip_count = (phba->fc_eventTag >> 1);
hs->lip_count -= lso->link_events;
hs->nos_count = -1;
} else {
hs->lip_count = -1;
hs->nos_count = (phba->fc_eventTag >> 1);
hs->nos_count -= lso->link_events;
}

hs->dumped_frames = -1;

/* FIX ME */
/*hs->SecondsSinceLastReset = (jiffies - lpfc_loadtime) / HZ;*/
seconds = get_seconds();
if (seconds < psli->stats_start)
hs->seconds_since_last_reset = seconds +
((unsigned long)-1 - psli->stats_start);
else
hs->seconds_since_last_reset = seconds - psli->stats_start;

return hs;
}

static void
lpfc_reset_stats(struct Scsi_Host *shost)
{
struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
struct lpfc_sli *psli = &phba->sli;
struct lpfc_lnk_stat * lso = &psli->lnk_stat_offsets;
LPFC_MBOXQ_t *pmboxq;
MAILBOX_t *pmb;
int rc = 0;

pmboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (!pmboxq)
return;
memset(pmboxq, 0, sizeof(LPFC_MBOXQ_t));

pmb = &pmboxq->mb;
pmb->mbxCommand = MBX_READ_STATUS;
pmb->mbxOwner = OWN_HOST;
pmb->un.varWords[0] = 0x1; /* reset request */
pmboxq->context1 = NULL;

if ((phba->fc_flag & FC_OFFLINE_MODE) ||
(!(psli->sli_flag & LPFC_SLI2_ACTIVE)))
rc = lpfc_sli_issue_mbox(phba, pmboxq, MBX_POLL);
else
rc = lpfc_sli_issue_mbox_wait(phba, pmboxq, phba->fc_ratov * 2);

if (rc != MBX_SUCCESS) {
if (rc == MBX_TIMEOUT)
pmboxq->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
else
mempool_free(pmboxq, phba->mbox_mem_pool);
return;
}

memset(pmboxq, 0, sizeof(LPFC_MBOXQ_t));
pmb->mbxCommand = MBX_READ_LNK_STAT;
pmb->mbxOwner = OWN_HOST;
pmboxq->context1 = NULL;

if ((phba->fc_flag & FC_OFFLINE_MODE) ||
(!(psli->sli_flag & LPFC_SLI2_ACTIVE)))
rc = lpfc_sli_issue_mbox(phba, pmboxq, MBX_POLL);
else
rc = lpfc_sli_issue_mbox_wait(phba, pmboxq, phba->fc_ratov * 2);

if (rc != MBX_SUCCESS) {
if (rc == MBX_TIMEOUT)
pmboxq->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
else
mempool_free( pmboxq, phba->mbox_mem_pool);
return;
}

lso->link_failure_count = pmb->un.varRdLnk.linkFailureCnt;
lso->loss_of_sync_count = pmb->un.varRdLnk.lossSyncCnt;
lso->loss_of_signal_count = pmb->un.varRdLnk.lossSignalCnt;
lso->prim_seq_protocol_err_count = pmb->un.varRdLnk.primSeqErrCnt;
lso->invalid_tx_word_count = pmb->un.varRdLnk.invalidXmitWord;
lso->invalid_crc_count = pmb->un.varRdLnk.crcCnt;
lso->error_frames = pmb->un.varRdLnk.crcCnt;
lso->link_events = (phba->fc_eventTag >> 1);

psli->stats_start = get_seconds();

return;
}

/*
* The LPFC driver treats linkdown handling as target loss events so there
Expand Down Expand Up @@ -1431,8 +1514,7 @@ struct fc_function_template lpfc_transport_functions = {
*/

.get_fc_host_stats = lpfc_get_stats,

/* the LPFC driver doesn't support resetting stats yet */
.reset_fc_host_stats = lpfc_reset_stats,

.dd_fcrport_size = sizeof(struct lpfc_rport_data),
.show_rport_maxframe_size = 1,
Expand Down
3 changes: 3 additions & 0 deletions drivers/scsi/lpfc/lpfc_sli.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1792,6 +1792,9 @@ lpfc_sli_brdrestart(struct lpfc_hba * phba)

spin_unlock_irq(phba->host->host_lock);

memset(&psli->lnk_stat_offsets, 0, sizeof(psli->lnk_stat_offsets));
psli->stats_start = get_seconds();

if (skip_post)
mdelay(100);
else
Expand Down
14 changes: 14 additions & 0 deletions drivers/scsi/lpfc/lpfc_sli.h
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Original file line number Diff line number Diff line change
Expand Up @@ -172,6 +172,18 @@ struct lpfc_sli_stat {
uint32_t mbox_busy; /* Mailbox cmd busy */
};

/* Structure to store link status values when port stats are reset */
struct lpfc_lnk_stat {
uint32_t link_failure_count;
uint32_t loss_of_sync_count;
uint32_t loss_of_signal_count;
uint32_t prim_seq_protocol_err_count;
uint32_t invalid_tx_word_count;
uint32_t invalid_crc_count;
uint32_t error_frames;
uint32_t link_events;
};

/* Structure used to hold SLI information */
struct lpfc_sli {
uint32_t num_rings;
Expand Down Expand Up @@ -201,6 +213,8 @@ struct lpfc_sli {
struct lpfc_iocbq ** iocbq_lookup; /* array to lookup IOCB by IOTAG */
size_t iocbq_lookup_len; /* current lengs of the array */
uint16_t last_iotag; /* last allocated IOTAG */
unsigned long stats_start; /* in seconds */
struct lpfc_lnk_stat lnk_stat_offsets;
};

/* Given a pointer to the start of the ring, and the slot number of
Expand Down

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