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[SCSI] bnx2fc: Tx/Rx byte counts reset to 0 when exceeding 32 bit values

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Since the FW counters are 32-bit, accumulate the stats in the driver.

[jejb: fix checkpatch warning]
Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Bhanu Prakash Gollapudi 2012-12-21 19:40:32 -08:00 committed by James Bottomley
parent e7f4fed5fa
commit f246fe2a56
2 changed files with 34 additions and 5 deletions
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22
drivers/scsi/bnx2fc/bnx2fc.h
View file

@ -156,6 +156,18 @@
#define BNX2FC_RELOGIN_WAIT_TIME 200
#define BNX2FC_RELOGIN_WAIT_CNT 10
#define BNX2FC_STATS(hba, stat, cnt) \
do { \
u32 val; \
\
val = fw_stats->stat.cnt; \
if (hba->prev_stats.stat.cnt <= val) \
val -= hba->prev_stats.stat.cnt; \
else \
val += (0xfffffff - hba->prev_stats.stat.cnt); \
hba->bfw_stats.cnt += val; \
} while (0)
/* bnx2fc driver uses only one instance of fcoe_percpu_s */
extern struct fcoe_percpu_s bnx2fc_global;
@ -167,6 +179,14 @@ struct bnx2fc_percpu_s {
spinlock_t fp_work_lock;
};
struct bnx2fc_fw_stats {
u64 fc_crc_cnt;
u64 fcoe_tx_pkt_cnt;
u64 fcoe_rx_pkt_cnt;
u64 fcoe_tx_byte_cnt;
u64 fcoe_rx_byte_cnt;
};
struct bnx2fc_hba {
struct list_head list;
struct cnic_dev *cnic;
@ -207,6 +227,8 @@ struct bnx2fc_hba {
struct bnx2fc_rport **tgt_ofld_list;
/* statistics */
struct bnx2fc_fw_stats bfw_stats;
struct fcoe_statistics_params prev_stats;
struct fcoe_statistics_params *stats_buffer;
dma_addr_t stats_buf_dma;
struct completion stat_req_done;

17
drivers/scsi/bnx2fc/bnx2fc_fcoe.c
View file

@ -687,11 +687,16 @@ static struct fc_host_statistics *bnx2fc_get_host_stats(struct Scsi_Host *shost)
BNX2FC_HBA_DBG(lport, "FW stat req timed out\n");
return bnx2fc_stats;
}
bnx2fc_stats->invalid_crc_count += fw_stats->rx_stat2.fc_crc_cnt;
bnx2fc_stats->tx_frames += fw_stats->tx_stat.fcoe_tx_pkt_cnt;
bnx2fc_stats->tx_words += (fw_stats->tx_stat.fcoe_tx_byte_cnt) / 4;
bnx2fc_stats->rx_frames += fw_stats->rx_stat0.fcoe_rx_pkt_cnt;
bnx2fc_stats->rx_words += (fw_stats->rx_stat0.fcoe_rx_byte_cnt) / 4;
BNX2FC_STATS(hba, rx_stat2, fc_crc_cnt);
bnx2fc_stats->invalid_crc_count += hba->bfw_stats.fc_crc_cnt;
BNX2FC_STATS(hba, tx_stat, fcoe_tx_pkt_cnt);
bnx2fc_stats->tx_frames += hba->bfw_stats.fcoe_tx_pkt_cnt;
BNX2FC_STATS(hba, tx_stat, fcoe_tx_byte_cnt);
bnx2fc_stats->tx_words += ((hba->bfw_stats.fcoe_tx_byte_cnt) / 4);
BNX2FC_STATS(hba, rx_stat0, fcoe_rx_pkt_cnt);
bnx2fc_stats->rx_frames += hba->bfw_stats.fcoe_rx_pkt_cnt;
BNX2FC_STATS(hba, rx_stat0, fcoe_rx_byte_cnt);
bnx2fc_stats->rx_words += ((hba->bfw_stats.fcoe_rx_byte_cnt) / 4);
bnx2fc_stats->dumped_frames = 0;
bnx2fc_stats->lip_count = 0;
@ -700,6 +705,8 @@ static struct fc_host_statistics *bnx2fc_get_host_stats(struct Scsi_Host *shost)
bnx2fc_stats->loss_of_signal_count = 0;
bnx2fc_stats->prim_seq_protocol_err_count = 0;
memcpy(&hba->prev_stats, hba->stats_buffer,
sizeof(struct fcoe_statistics_params));
return bnx2fc_stats;
}