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cxgb4: Added support in debugfs to dump PM module stats

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Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hariprasad Shenai 2015-01-27 13:47:48 +05:30 committed by David S. Miller
parent c778af7d18
commit b3bbe36a26
5 changed files with 135 additions and 0 deletions
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2
drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
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@ -1054,6 +1054,8 @@ int t4_mc_read(struct adapter *adap, int idx, u32 addr, __be32 *data,
u64 *parity);
int t4_edc_read(struct adapter *adap, int idx, u32 addr, __be32 *data,
u64 *parity);
void t4_pmtx_get_stats(struct adapter *adap, u32 cnt[], u64 cycles[]);
void t4_pmrx_get_stats(struct adapter *adap, u32 cnt[], u64 cycles[]);
int t4_read_cim_ibq(struct adapter *adap, unsigned int qid, u32 *data,
size_t n);
int t4_read_cim_obq(struct adapter *adap, unsigned int qid, u32 *data,

66
drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
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@ -315,6 +315,71 @@ static const struct file_operations cim_obq_fops = {
.release = seq_release_private
};
/* Show the PM memory stats. These stats include:
*
* TX:
* Read: memory read operation
* Write Bypass: cut-through
* Bypass + mem: cut-through and save copy
*
* RX:
* Read: memory read
* Write Bypass: cut-through
* Flush: payload trim or drop
*/
static int pm_stats_show(struct seq_file *seq, void *v)
{
static const char * const tx_pm_stats[] = {
"Read:", "Write bypass:", "Write mem:", "Bypass + mem:"
};
static const char * const rx_pm_stats[] = {
"Read:", "Write bypass:", "Write mem:", "Flush:"
};
int i;
u32 tx_cnt[PM_NSTATS], rx_cnt[PM_NSTATS];
u64 tx_cyc[PM_NSTATS], rx_cyc[PM_NSTATS];
struct adapter *adap = seq->private;
t4_pmtx_get_stats(adap, tx_cnt, tx_cyc);
t4_pmrx_get_stats(adap, rx_cnt, rx_cyc);
seq_printf(seq, "%13s %10s %20s\n", " ", "Tx pcmds", "Tx bytes");
for (i = 0; i < PM_NSTATS - 1; i++)
seq_printf(seq, "%-13s %10u %20llu\n",
tx_pm_stats[i], tx_cnt[i], tx_cyc[i]);
seq_printf(seq, "%13s %10s %20s\n", " ", "Rx pcmds", "Rx bytes");
for (i = 0; i < PM_NSTATS - 1; i++)
seq_printf(seq, "%-13s %10u %20llu\n",
rx_pm_stats[i], rx_cnt[i], rx_cyc[i]);
return 0;
}
static int pm_stats_open(struct inode *inode, struct file *file)
{
return single_open(file, pm_stats_show, inode->i_private);
}
static ssize_t pm_stats_clear(struct file *file, const char __user *buf,
size_t count, loff_t *pos)
{
struct adapter *adap = FILE_DATA(file)->i_private;
t4_write_reg(adap, PM_RX_STAT_CONFIG_A, 0);
t4_write_reg(adap, PM_TX_STAT_CONFIG_A, 0);
return count;
}
static const struct file_operations pm_stats_debugfs_fops = {
.owner = THIS_MODULE,
.open = pm_stats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = pm_stats_clear
};
/* Firmware Device Log dump. */
static const char * const devlog_level_strings[] = {
[FW_DEVLOG_LEVEL_EMERG] = "EMERG",
@ -1434,6 +1499,7 @@ int t4_setup_debugfs(struct adapter *adap)
{ "obq_ulp3", &cim_obq_fops, S_IRUSR, 3 },
{ "obq_sge", &cim_obq_fops, S_IRUSR, 4 },
{ "obq_ncsi", &cim_obq_fops, S_IRUSR, 5 },
{ "pm_stats", &pm_stats_debugfs_fops, S_IRUSR, 0 },
#if IS_ENABLED(CONFIG_IPV6)
{ "clip_tbl", &clip_tbl_debugfs_fops, S_IRUSR, 0 },
#endif

54
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
View File

@ -2511,6 +2511,60 @@ void t4_load_mtus(struct adapter *adap, const unsigned short *mtus,
}
}
/**
* t4_pmtx_get_stats - returns the HW stats from PMTX
* @adap: the adapter
* @cnt: where to store the count statistics
* @cycles: where to store the cycle statistics
*
* Returns performance statistics from PMTX.
*/
void t4_pmtx_get_stats(struct adapter *adap, u32 cnt[], u64 cycles[])
{
int i;
u32 data[2];
for (i = 0; i < PM_NSTATS; i++) {
t4_write_reg(adap, PM_TX_STAT_CONFIG_A, i + 1);
cnt[i] = t4_read_reg(adap, PM_TX_STAT_COUNT_A);
if (is_t4(adap->params.chip)) {
cycles[i] = t4_read_reg64(adap, PM_TX_STAT_LSB_A);
} else {
t4_read_indirect(adap, PM_TX_DBG_CTRL_A,
PM_TX_DBG_DATA_A, data, 2,
PM_TX_DBG_STAT_MSB_A);
cycles[i] = (((u64)data[0] << 32) | data[1]);
}
}
}
/**
* t4_pmrx_get_stats - returns the HW stats from PMRX
* @adap: the adapter
* @cnt: where to store the count statistics
* @cycles: where to store the cycle statistics
*
* Returns performance statistics from PMRX.
*/
void t4_pmrx_get_stats(struct adapter *adap, u32 cnt[], u64 cycles[])
{
int i;
u32 data[2];
for (i = 0; i < PM_NSTATS; i++) {
t4_write_reg(adap, PM_RX_STAT_CONFIG_A, i + 1);
cnt[i] = t4_read_reg(adap, PM_RX_STAT_COUNT_A);
if (is_t4(adap->params.chip)) {
cycles[i] = t4_read_reg64(adap, PM_RX_STAT_LSB_A);
} else {
t4_read_indirect(adap, PM_RX_DBG_CTRL_A,
PM_RX_DBG_DATA_A, data, 2,
PM_RX_DBG_STAT_MSB_A);
cycles[i] = (((u64)data[0] << 32) | data[1]);
}
}
}
/**
* get_mps_bg_map - return the buffer groups associated with a port
* @adap: the adapter

1
drivers/net/ethernet/chelsio/cxgb4/t4_hw.h
View File

@ -48,6 +48,7 @@ enum {
NMTUS = 16, /* size of MTU table */
NCCTRL_WIN = 32, /* # of congestion control windows */
L2T_SIZE = 4096, /* # of L2T entries */
PM_NSTATS = 5, /* # of PM stats */
MBOX_LEN = 64, /* mailbox size in bytes */
TRACE_LEN = 112, /* length of trace data and mask */
FILTER_OPT_LEN = 36, /* filter tuple width for optional components */

12
drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
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@ -1380,6 +1380,12 @@
#define PBL_BOUND_ERR_CH0_F PBL_BOUND_ERR_CH0_V(1U)
#define PM_RX_INT_CAUSE_A 0x8fdc
#define PM_RX_STAT_CONFIG_A 0x8fc8
#define PM_RX_STAT_COUNT_A 0x8fcc
#define PM_RX_STAT_LSB_A 0x8fd0
#define PM_RX_DBG_CTRL_A 0x8fd0
#define PM_RX_DBG_DATA_A 0x8fd4
#define PM_RX_DBG_STAT_MSB_A 0x10013
#define PMRX_FRAMING_ERROR_F 0x003ffff0U
@ -1404,6 +1410,12 @@
#define PMRX_E_PCMD_PAR_ERROR_F PMRX_E_PCMD_PAR_ERROR_V(1U)
#define PM_TX_INT_CAUSE_A 0x8ffc
#define PM_TX_STAT_CONFIG_A 0x8fe8
#define PM_TX_STAT_COUNT_A 0x8fec
#define PM_TX_STAT_LSB_A 0x8ff0
#define PM_TX_DBG_CTRL_A 0x8ff0
#define PM_TX_DBG_DATA_A 0x8ff4
#define PM_TX_DBG_STAT_MSB_A 0x1001a
#define PCMD_LEN_OVFL0_S 31
#define PCMD_LEN_OVFL0_V(x) ((x) << PCMD_LEN_OVFL0_S)