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i40e: convert VEB TC stats to use an i40e_stats array 

The VEB TC stats are currently implemented with separate parsing,
instead of using the i40e_stats array and associated helper functions.
This is likely because the stats rely on embedding the TC number into
the stat name.

Update i40e_add_stat_strings to take variadic arguments, and use these
to vsnprintf the i40e_stats string as a string containing format
specifiers.

Create a stats array for the VEB TC related stats,
i40e_gstrings_veb_tc_stats, and use this along with the helper functions
to remove the specialized boiler plate code.

Always call i40e_add_ethtool_stats for both this array and the general
VEB stats array. This ensures that we zero out any memory in case it was
not zero-allocated for us.

This ultimately results in less boiler plate code for the
i40e_get_stat_strings and i40e_get_ethtool_stats.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jacob Keller 2018-07-31 03:41:41 -07:00 committed by Jeff Kirsher
parent 1ac2ee231f
commit 1510ae0be2
1 changed files with 43 additions and 40 deletions
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83
drivers/net/ethernet/intel/i40e/i40e_ethtool.c
View File

@ -7,6 +7,11 @@
#include "i40e_diag.h"
struct i40e_stats {
/* The stat_string is expected to be a format string formatted using
* vsnprintf by i40e_add_stat_strings. Every member of a stats array
* should use the same format specifiers as they will be formatted
* using the same variadic arguments.
*/
char stat_string[ETH_GSTRING_LEN];
int sizeof_stat;
int stat_offset;
@ -56,6 +61,13 @@ static const struct i40e_stats i40e_gstrings_veb_stats[] = {
I40E_VEB_STAT("veb.rx_unknown_protocol", stats.rx_unknown_protocol),
};
static const struct i40e_stats i40e_gstrings_veb_tc_stats[] = {
I40E_VEB_STAT("veb.tc_%u_tx_packets", tc_stats.tc_tx_packets),
I40E_VEB_STAT("veb.tc_%u_tx_bytes", tc_stats.tc_tx_bytes),
I40E_VEB_STAT("veb.tc_%u_rx_packets", tc_stats.tc_rx_packets),
I40E_VEB_STAT("veb.tc_%u_rx_bytes", tc_stats.tc_rx_bytes),
};
static const struct i40e_stats i40e_gstrings_misc_stats[] = {
I40E_VSI_STAT("rx_unicast", eth_stats.rx_unicast),
I40E_VSI_STAT("tx_unicast", eth_stats.tx_unicast),
@ -162,16 +174,14 @@ static const struct i40e_stats i40e_gstrings_stats[] = {
FIELD_SIZEOF(struct i40e_pf, stats.priority_xon_tx) + \
FIELD_SIZEOF(struct i40e_pf, stats.priority_xon_2_xoff)) \
/ sizeof(u64))
#define I40E_VEB_TC_STATS_LEN ( \
(FIELD_SIZEOF(struct i40e_veb, tc_stats.tc_rx_packets) + \
FIELD_SIZEOF(struct i40e_veb, tc_stats.tc_rx_bytes) + \
FIELD_SIZEOF(struct i40e_veb, tc_stats.tc_tx_packets) + \
FIELD_SIZEOF(struct i40e_veb, tc_stats.tc_tx_bytes)) \
/ sizeof(u64))
#define I40E_VEB_STATS_LEN ARRAY_SIZE(i40e_gstrings_veb_stats)
#define I40E_VEB_STATS_TOTAL (I40E_VEB_STATS_LEN + I40E_VEB_TC_STATS_LEN)
#define I40E_VEB_STATS_LEN (ARRAY_SIZE(i40e_gstrings_veb_stats) + \
(ARRAY_SIZE(i40e_gstrings_veb_tc_stats) * \
I40E_MAX_TRAFFIC_CLASS))
#define I40E_PF_STATS_LEN(n) (I40E_GLOBAL_STATS_LEN + \
I40E_PFC_STATS_LEN + \
I40E_VEB_STATS_LEN + \
I40E_VSI_STATS_LEN((n)))
enum i40e_ethtool_test_id {
@ -1681,7 +1691,7 @@ static int i40e_get_stats_count(struct net_device *netdev)
struct i40e_pf *pf = vsi->back;
if (vsi == pf->vsi[pf->lan_vsi] && pf->hw.partition_id == 1)
return I40E_PF_STATS_LEN(netdev) + I40E_VEB_STATS_TOTAL;
return I40E_PF_STATS_LEN(netdev);
else
return I40E_VSI_STATS_LEN(netdev);
}
@ -1809,8 +1819,10 @@ static void i40e_get_ethtool_stats(struct net_device *netdev,
struct i40e_ring *tx_ring, *rx_ring;
struct i40e_vsi *vsi = np->vsi;
struct i40e_pf *pf = vsi->back;
struct i40e_veb *veb = pf->veb[pf->lan_veb];
unsigned int i;
unsigned int start;
bool veb_stats;
i40e_update_stats(vsi);
@ -1855,21 +1867,19 @@ static void i40e_get_ethtool_stats(struct net_device *netdev,
if (vsi != pf->vsi[pf->lan_vsi] || pf->hw.partition_id != 1)
return;
if ((pf->lan_veb != I40E_NO_VEB) &&
(pf->flags & I40E_FLAG_VEB_STATS_ENABLED)) {
struct i40e_veb *veb = pf->veb[pf->lan_veb];
veb_stats = ((pf->lan_veb != I40E_NO_VEB) &&
(pf->flags & I40E_FLAG_VEB_STATS_ENABLED));
i40e_add_ethtool_stats(&data, veb, i40e_gstrings_veb_stats);
/* If veb stats aren't enabled, pass NULL instead of the veb so that
* we initialize stats to zero and update the data pointer
* intelligently
*/
i40e_add_ethtool_stats(&data, veb_stats ? veb : NULL,
i40e_gstrings_veb_stats);
for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
*(data++) = veb->tc_stats.tc_tx_packets[i];
*(data++) = veb->tc_stats.tc_tx_bytes[i];
*(data++) = veb->tc_stats.tc_rx_packets[i];
*(data++) = veb->tc_stats.tc_rx_bytes[i];
}
} else {
data += I40E_VEB_STATS_TOTAL;
}
for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
i40e_add_ethtool_stats(&data, veb_stats ? veb : NULL,
i40e_gstrings_veb_tc_stats);
i40e_add_ethtool_stats(&data, pf, i40e_gstrings_stats);
@ -1891,16 +1901,21 @@ static void i40e_get_ethtool_stats(struct net_device *netdev,
* @stats: stat definitions array
* @size: size of the stats array
*
* Copy the strings described by stats into the buffer pointed at by p.
* Format and copy the strings described by stats into the buffer pointed at
* by p.
**/
static void __i40e_add_stat_strings(u8 **p, const struct i40e_stats stats[],
const unsigned int size)
const unsigned int size, ...)
{
unsigned int i;
for (i = 0; i < size; i++) {
snprintf(*p, ETH_GSTRING_LEN, "%s", stats[i].stat_string);
va_list args;
va_start(args, size);
vsnprintf(*p, ETH_GSTRING_LEN, stats[i].stat_string, args);
*p += ETH_GSTRING_LEN;
va_end(args);
}
}
@ -1914,7 +1929,7 @@ static void __i40e_add_stat_strings(u8 **p, const struct i40e_stats stats[],
* for it.
**/
#define i40e_add_stat_strings(p, stats, ...) \
__i40e_add_stat_strings(p, stats, ARRAY_SIZE(stats))
__i40e_add_stat_strings(p, stats, ARRAY_SIZE(stats), ## __VA_ARGS__)
/**
* i40e_get_stat_strings - copy stat strings into supplied buffer
@ -1953,20 +1968,8 @@ static void i40e_get_stat_strings(struct net_device *netdev, u8 *data)
i40e_add_stat_strings(&data, i40e_gstrings_veb_stats);
for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
snprintf(data, ETH_GSTRING_LEN,
"veb.tc_%u_tx_packets", i);
data += ETH_GSTRING_LEN;
snprintf(data, ETH_GSTRING_LEN,
"veb.tc_%u_tx_bytes", i);
data += ETH_GSTRING_LEN;
snprintf(data, ETH_GSTRING_LEN,
"veb.tc_%u_rx_packets", i);
data += ETH_GSTRING_LEN;
snprintf(data, ETH_GSTRING_LEN,
"veb.tc_%u_rx_bytes", i);
data += ETH_GSTRING_LEN;
}
for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
i40e_add_stat_strings(&data, i40e_gstrings_veb_tc_stats, i);
i40e_add_stat_strings(&data, i40e_gstrings_stats);