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nvethernet: Add temperature based pad calibration.

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Ethernet pad calibration needs to be triggered for temperature
changes in steps of 35C from -40C to 110C. In order to get
indication of current operating temperature, register a ethernet
cooling device with thermal zones defined as per above requirement.
When the temperature trips these zones, callback function is invoked
from kernel thermal framework, and ethernet driver can trigger pad
calibration.

Bug 1679250

Change-Id: Iaeccca650e371843fa571f7b368bb5464e106314
Signed-off-by: Srinivas Ramachandran <srinivasra@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2120431
GVS: Gerrit_Virtual_Submit
Reviewed-by: Ajay Gupta <ajayg@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:
Srinivas Ramachandran
2019-05-17 16:16:10 -07:00
committed by Revanth Kumar Uppala
parent e05030a4e2
commit 3565e0eb75
3 changed files with 167 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/net/ethernet/nvidia/nvethernet/ether_linux.h
View File

@@ -23,6 +23,7 @@
#include <linux/of_gpio.h>
#include <linux/of_mdio.h>
#include <linux/if_vlan.h>
#include <linux/thermal.h>
#include <linux/of_net.h>
#include <linux/module.h>
#include <linux/reset.h>
@@ -71,6 +72,13 @@ static inline int ether_avail_txdesc_cnt(struct osi_tx_ring *tx_ring)
(TX_DESC_CNT - 1));
}
#ifdef THERMAL_CAL
/* The DT binding for ethernet device has 5 thermal zones in steps of
* 35 degress from -40C to 110C. Each zone corresponds to a state.
*/
#define ETHER_MAX_THERM_STATE 5UL
#endif /* THERMAL_CAL */
/**
* struct ether_tx_napi - DMA Transmit Channel NAPI
* @chan: Transmit channel number
@@ -131,6 +139,13 @@ struct ether_rx_napi {
* @mac_loopback_mode: MAC loopback mode
* @q_prio: Array of MTL queue TX priority
* @hw_feat_cur_state: Current state of features enabled in HW
* @tcd: Pointer to thermal cooling device which this driver
* registers with the kernel. Kernel will invoke the
* callback ops for this cooling device when temperate
* in thermal zone defined in DT binding for this driver
* is tripped.
* @therm_state: Atomic variable to hold the current temperature zone
* which has triggered.
*/
struct ether_priv_data {
struct osi_core_priv_data *osi_core;
@@ -174,6 +189,11 @@ struct ether_priv_data {
/* for MAC loopback */
unsigned int mac_loopback_mode;
unsigned int q_prio[OSI_EQOS_MAX_NUM_CHANS];
#ifdef THERMAL_CAL
struct thermal_cooling_device *tcd;
atomic_t therm_state;
#endif /* THERMAL_CAL */
};
void ether_set_ethtool_ops(struct net_device *ndev);