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nvethernet: read ethernet hw counters periodically

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HW MMC registers are 32 bits in size. Some of these will
overrun in few secs if there are live traffic at line rate.

Scheduling work queue to get periodic value from MMC
HW registers and update in 64 bits local variables, will
be solution to this HW limitation.

Bug 200544686

Change-Id: Ifc358f3f6b50839f7d9f48c2f98cb2cdd9ac0821
Signed-off-by: Rakesh Goyal <rgoyal@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2179298
Reviewed-by: Bhadram Varka <vbhadram@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Srinivas Ramachandran <srinivasra@nvidia.com>
Reviewed-by: Ashutosh Jha <ajha@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Rakesh Goyal
2019-08-20 16:32:44 +05:30
committed by Revanth Kumar Uppala
parent e93d5e1e55
commit 8708cf6e98
2 changed files with 93 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/net/ethernet/nvidia/nvethernet/ether_linux.h
View File

@@ -22,6 +22,7 @@
#include <linux/etherdevice.h>
#include <linux/net_tstamp.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/spinlock.h>
#include <linux/of_gpio.h>
#include <linux/of_mdio.h>
@@ -160,6 +161,12 @@ static inline int ether_avail_txdesc_cnt(struct osi_tx_ring *tx_ring)
#define ETHER_MAX_THERM_STATE 5UL
#endif /* THERMAL_CAL */
/**
* @brief Timer to trigger Work queue periodically which read HW counters
* and store locally. If data is at line rate, 2^32 entry get will filled in
* 36 second for 1 G interface and 3.6 sec for 10 G interface.
*/
#define ETHER_STATS_TIMER 3U
/**
* @brief DMA Transmit Channel NAPI
*/
@@ -300,14 +307,16 @@ struct ether_priv_data {
raw_spinlock_t ptp_lock;
/** Clocks enable check */
bool clks_enable;
/** Delayed work queue to read RMON counters periodically */
struct delayed_work ether_stats_work;
};
/**
* @brief Set ethtool operations
*
*
* @param[in] ndev: network device instance
*
* @note Network device needs to created.
* @note Network device needs to created.
*/
void ether_set_ethtool_ops(struct net_device *ndev);
/**
@@ -315,7 +324,7 @@ void ether_set_ethtool_ops(struct net_device *ndev);
*
* @param[in] dev: device instance
*
* @retval 0 - success,
* @retval 0 - success,
* @retval "negative value" - failure.
*/
int ether_sysfs_register(struct device *dev);
@@ -340,7 +349,7 @@ void ether_sysfs_unregister(struct device *dev);
* network device created
*
* @retval 0 on success
* @retval "negative value" on Failure
* @retval "negative value" on Failure
*/
int ether_ptp_init(struct ether_priv_data *pdata);
@@ -365,7 +374,7 @@ void ether_ptp_remove(struct ether_priv_data *pdata);
*
* @note PTP clock driver need to be successfully registered during
* initialization and HW need to support PTP functionality.
*
*
* @retval 0 on success
* @retval "negative value" on Failure
*/