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3565e0eb75
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>
203 lines
6.0 KiB
C
203 lines
6.0 KiB
C
/*
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* Copyright (c) 2018-2019, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ETHER_LINUX_H
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#define ETHER_LINUX_H
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#include <linux/platform_device.h>
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#include <linux/etherdevice.h>
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#include <linux/interrupt.h>
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#include <linux/of_gpio.h>
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#include <linux/of_mdio.h>
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#include <linux/if_vlan.h>
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#include <linux/thermal.h>
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#include <linux/of_net.h>
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#include <linux/module.h>
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#include <linux/reset.h>
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#include <linux/slab.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/tcp.h>
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#include <linux/udp.h>
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#include <linux/of.h>
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#include <osi_core.h>
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#include <osi_dma.h>
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#include "ioctl.h"
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#define ETHER_MAX_IRQS 4
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#define ETHER_IRQ_MAX_IDX 8
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#define ETHER_IRQ_NAME_SZ 32
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#define ETHER_QUEUE_PRIO_DEFAULT 0U
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#define ETHER_QUEUE_PRIO_MAX 7U
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/* Map max. 4KB buffer per Tx descriptor */
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#define ETHER_MAX_DATA_LEN_PER_TXD_BUF BIT(12)
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/* Incase of TSO/GSO, Tx ring needs atmost MAX_SKB_FRAGS +
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* one context descriptor +
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* one descriptor for header/linear buffer payload
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*/
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#define TX_DESC_THRESHOLD (MAX_SKB_FRAGS + 2)
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/**
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* ether_avail_txdesc_count - Return count of available tx desc.
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* @tx_ring: Tx ring instance associated with channel number
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*
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* Algorithm: Check the difference between current desc index
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* and the desc. index to be cleaned.
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*
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* Dependencies: MAC needs to be initialized and Tx ring allocated.
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*
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* Protection: None.
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*
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* Return: Number of available descriptors in the given Tx ring.
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*/
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static inline int ether_avail_txdesc_cnt(struct osi_tx_ring *tx_ring)
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{
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return ((tx_ring->clean_idx - tx_ring->cur_tx_idx - 1) &
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(TX_DESC_CNT - 1));
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}
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#ifdef THERMAL_CAL
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/* The DT binding for ethernet device has 5 thermal zones in steps of
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* 35 degress from -40C to 110C. Each zone corresponds to a state.
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*/
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#define ETHER_MAX_THERM_STATE 5UL
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#endif /* THERMAL_CAL */
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/**
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* struct ether_tx_napi - DMA Transmit Channel NAPI
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* @chan: Transmit channel number
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* @pdata: OSD private data
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* @napi: NAPI instance associated with transmit channel
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*/
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struct ether_tx_napi {
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unsigned int chan;
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struct ether_priv_data *pdata;
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struct napi_struct napi;
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};
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/**
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* struct ether_rx_napi - DMA Receive Channel NAPI
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* @chan: Receive channel number
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* @pdata: OSD Private data
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* @napi: NAPI instance associated with receive channel
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*/
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struct ether_rx_napi {
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unsigned int chan;
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struct ether_priv_data *pdata;
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struct napi_struct napi;
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};
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/**
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* struct ether_priv_data - Ethernet driver private data
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* @osi_core: OSI core private data
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* @osi_dma: OSI DMA private data
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* @hwfeat: HW supported feature list
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* @tx_napi: Array of DMA Transmit channel NAPI
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* @rx_napi: Array of DMA Receive channel NAPI
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* @ndev: Network device associated with driver
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* @dev: Base device associated with driver
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* @mac_rst: Reset for the MAC
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* @pllrefe_clk: PLLREFE clock
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* @axi_clk: Clock from AXI
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* @axi_cbb_clk: Clock from AXI CBB
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* @rx_clk: Receive clock (which will be driven from the PHY)
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* @ptp_ref_clk: PTP reference clock from AXI
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* @tx_clk: Transmit clock
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* @phy_node: Pointer to PHY device tree node
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* @mdio_node: Pointer to MDIO device tree node
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* @mii: Pointer to MII bus instance
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* @phydev: Pointer to the PHY device
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* @interface: Interface type assciated with MAC (SGMII/RGMII/...)
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* this information will be provided with phy-mode DT
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* entry
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* @oldlink: Previous detected link
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* @speed: PHY link speed
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* @oldduplex: Previous detected mode
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* @phy_reset: Reset for PHY
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* @rx_irq_alloc_mask: Tx IRQ alloc mask
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* @tx_irq_alloc_mask: Rx IRQ alloc mask
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* @common_irq: Common IRQ number for MAC
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* @tx_irqs: Array of DMA Transmit channel IRQ numbers
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* @rx_irqs: Array of DMA Receive channel IRQ numbers
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* @dma_mask: memory allocation mask
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* @mac_loopback_mode: MAC loopback mode
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* @q_prio: Array of MTL queue TX priority
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* @hw_feat_cur_state: Current state of features enabled in HW
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* @tcd: Pointer to thermal cooling device which this driver
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* registers with the kernel. Kernel will invoke the
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* callback ops for this cooling device when temperate
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* in thermal zone defined in DT binding for this driver
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* is tripped.
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* @therm_state: Atomic variable to hold the current temperature zone
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* which has triggered.
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*/
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struct ether_priv_data {
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struct osi_core_priv_data *osi_core;
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struct osi_dma_priv_data *osi_dma;
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struct osi_hw_features hw_feat;
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struct ether_tx_napi *tx_napi[OSI_EQOS_MAX_NUM_CHANS];
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struct ether_rx_napi *rx_napi[OSI_EQOS_MAX_NUM_CHANS];
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struct net_device *ndev;
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struct device *dev;
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struct reset_control *mac_rst;
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struct clk *pllrefe_clk;
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struct clk *axi_clk;
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struct clk *axi_cbb_clk;
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struct clk *rx_clk;
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struct clk *ptp_ref_clk;
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struct clk *tx_clk;
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struct device_node *phy_node;
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struct device_node *mdio_node;
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struct mii_bus *mii;
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struct phy_device *phydev;
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int interface;
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unsigned int oldlink;
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int speed;
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int oldduplex;
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int phy_reset;
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unsigned int rx_irq_alloc_mask;
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unsigned int tx_irq_alloc_mask;
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unsigned int common_irq_alloc_mask;
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int common_irq;
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int tx_irqs[ETHER_MAX_IRQS];
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int rx_irqs[ETHER_MAX_IRQS];
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unsigned long long dma_mask;
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netdev_features_t hw_feat_cur_state;
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/* for MAC loopback */
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unsigned int mac_loopback_mode;
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unsigned int q_prio[OSI_EQOS_MAX_NUM_CHANS];
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#ifdef THERMAL_CAL
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struct thermal_cooling_device *tcd;
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atomic_t therm_state;
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#endif /* THERMAL_CAL */
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};
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void ether_set_ethtool_ops(struct net_device *ndev);
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int ether_sysfs_register(struct device *dev);
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void ether_sysfs_unregister(struct device *dev);
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#endif /* ETHER_LINUX_H */
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