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/* SPDX-License-Identifier: GPL-2.0 */
/* Texas Instruments ICSSG Ethernet driver
*
* Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
*
*/
#ifndef __NET_TI_ICSSG_PRUETH_H
#define __NET_TI_ICSSG_PRUETH_H
#include <linux/etherdevice.h>
#include <linux/genalloc.h>
#include <linux/if_vlan.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/net_tstamp.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/of_platform.h>
#include <linux/phy.h>
#include <linux/remoteproc/pruss.h>
#include <linux/pruss_driver.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/remoteproc.h>
#include <linux/dma-mapping.h>
#include <linux/dma/ti-cppi5.h>
#include <linux/dma/k3-udma-glue.h>
#include <net/devlink.h>
#include "icssg_config.h"
#include "icss_iep.h"
#include "icssg_switch_map.h"
#define PRUETH_MAX_MTU (2000 - ETH_HLEN - ETH_FCS_LEN)
#define PRUETH_MIN_PKT_SIZE (VLAN_ETH_ZLEN)
#define PRUETH_MAX_PKT_SIZE (PRUETH_MAX_MTU + ETH_HLEN + ETH_FCS_LEN)
#define ICSS_SLICE0 0
#define ICSS_SLICE1 1
#define ICSS_FW_PRU 0
#define ICSS_FW_RTU 1
#define ICSSG_MAX_RFLOWS 8 /* per slice */
/* Number of ICSSG related stats */
#define ICSSG_NUM_STATS 60
#define ICSSG_NUM_STANDARD_STATS 31
#define ICSSG_NUM_ETHTOOL_STATS (ICSSG_NUM_STATS - ICSSG_NUM_STANDARD_STATS)
/* Firmware status codes */
#define ICSS_HS_FW_READY 0x55555555
#define ICSS_HS_FW_DEAD 0xDEAD0000 /* lower 16 bits contain error code */
/* Firmware command codes */
#define ICSS_HS_CMD_BUSY 0x40000000
#define ICSS_HS_CMD_DONE 0x80000000
#define ICSS_HS_CMD_CANCEL 0x10000000
/* Firmware commands */
#define ICSS_CMD_SPAD 0x20
#define ICSS_CMD_RXTX 0x10
#define ICSS_CMD_ADD_FDB 0x1
#define ICSS_CMD_DEL_FDB 0x2
#define ICSS_CMD_SET_RUN 0x4
#define ICSS_CMD_GET_FDB_SLOT 0x5
#define ICSS_CMD_ENABLE_VLAN 0x5
#define ICSS_CMD_DISABLE_VLAN 0x6
#define ICSS_CMD_ADD_FILTER 0x7
#define ICSS_CMD_ADD_MAC 0x8
/* In switch mode there are 3 real ports i.e. 3 mac addrs.
* however Linux sees only the host side port. The other 2 ports
* are the switch ports.
* In emac mode there are 2 real ports i.e. 2 mac addrs.
* Linux sees both the ports.
*/
enum prueth_port {
PRUETH_PORT_HOST = 0, /* host side port */
PRUETH_PORT_MII0, /* physical port RG/SG MII 0 */
PRUETH_PORT_MII1, /* physical port RG/SG MII 1 */
PRUETH_PORT_INVALID, /* Invalid prueth port */
};
enum prueth_mac {
PRUETH_MAC0 = 0,
PRUETH_MAC1,
PRUETH_NUM_MACS,
PRUETH_MAC_INVALID,
};
struct prueth_tx_chn {
struct device *dma_dev;
struct napi_struct napi_tx;
struct k3_cppi_desc_pool *desc_pool;
struct k3_udma_glue_tx_channel *tx_chn;
struct prueth_emac *emac;
u32 id;
u32 descs_num;
unsigned int irq;
char name[32];
};
struct prueth_rx_chn {
struct device *dev;
struct device *dma_dev;
struct k3_cppi_desc_pool *desc_pool;
struct k3_udma_glue_rx_channel *rx_chn;
u32 descs_num;
unsigned int irq[ICSSG_MAX_RFLOWS]; /* separate irq per flow */
char name[32];
};
/* There are 4 Tx DMA channels, but the highest priority is CH3 (thread 3)
* and lower three are lower priority channels or threads.
*/
#define PRUETH_MAX_TX_QUEUES 4
#define PRUETH_MAX_TX_TS_REQUESTS 50 /* Max simultaneous TX_TS requests */
/* data for each emac port */
struct prueth_emac {
bool fw_running;
struct prueth *prueth;
struct net_device *ndev;
u8 mac_addr[6];
struct napi_struct napi_rx;
u32 msg_enable;
int link;
int speed;
int duplex;
const char *phy_id;
struct device_node *phy_node;
phy_interface_t phy_if;
enum prueth_port port_id;
struct icss_iep *iep;
unsigned int rx_ts_enabled : 1;
unsigned int tx_ts_enabled : 1;
unsigned int half_duplex : 1;
/* DMA related */
struct prueth_tx_chn tx_chns[PRUETH_MAX_TX_QUEUES];
struct completion tdown_complete;
atomic_t tdown_cnt;
struct prueth_rx_chn rx_chns;
int rx_flow_id_base;
int tx_ch_num;
spinlock_t lock; /* serialize access */
/* TX HW Timestamping */
/* TX TS cookie will be index to the tx_ts_skb array */
struct sk_buff *tx_ts_skb[PRUETH_MAX_TX_TS_REQUESTS];
atomic_t tx_ts_pending;
int tx_ts_irq;
u8 cmd_seq;
/* shutdown related */
u32 cmd_data[4];
struct completion cmd_complete;
/* Mutex to serialize access to firmware command interface */
struct mutex cmd_lock;
struct work_struct rx_mode_work;
struct workqueue_struct *cmd_wq;
struct pruss_mem_region dram;
struct delayed_work stats_work;
u64 stats[ICSSG_NUM_STATS];
};
/**
* struct prueth_pdata - PRUeth platform data
* @fdqring_mode: Free desc queue mode
* @quirk_10m_link_issue: 10M link detect errata
*/
struct prueth_pdata {
enum k3_ring_mode fdqring_mode;
u32 quirk_10m_link_issue:1;
};
/**
* struct prueth - PRUeth structure
* @dev: device
* @pruss: pruss handle
* @pru: rproc instances of PRUs
* @rtu: rproc instances of RTUs
* @txpru: rproc instances of TX_PRUs
* @shram: PRUSS shared RAM region
* @sram_pool: MSMC RAM pool for buffers
* @msmcram: MSMC RAM region
* @eth_node: DT node for the port
* @emac: private EMAC data structure
* @registered_netdevs: list of registered netdevs
* @miig_rt: regmap to mii_g_rt block
* @mii_rt: regmap to mii_rt block
* @pru_id: ID for each of the PRUs
* @pdev: pointer to ICSSG platform device
* @pdata: pointer to platform data for ICSSG driver
* @icssg_hwcmdseq: seq counter or HWQ messages
* @emacs_initialized: num of EMACs/ext ports that are up/running
* @iep0: pointer to IEP0 device
* @iep1: pointer to IEP1 device
*/
struct prueth {
struct device *dev;
struct pruss *pruss;
struct rproc *pru[PRUSS_NUM_PRUS];
struct rproc *rtu[PRUSS_NUM_PRUS];
struct rproc *txpru[PRUSS_NUM_PRUS];
struct pruss_mem_region shram;
struct gen_pool *sram_pool;
struct pruss_mem_region msmcram;
struct device_node *eth_node[PRUETH_NUM_MACS];
struct prueth_emac *emac[PRUETH_NUM_MACS];
struct net_device *registered_netdevs[PRUETH_NUM_MACS];
struct regmap *miig_rt;
struct regmap *mii_rt;
enum pruss_pru_id pru_id[PRUSS_NUM_PRUS];
struct platform_device *pdev;
struct prueth_pdata pdata;
u8 icssg_hwcmdseq;
int emacs_initialized;
struct icss_iep *iep0;
struct icss_iep *iep1;
};
struct emac_tx_ts_response {
u32 reserved[2];
u32 cookie;
u32 lo_ts;
u32 hi_ts;
};
/* get PRUSS SLICE number from prueth_emac */
static inline int prueth_emac_slice(struct prueth_emac *emac)
{
switch (emac->port_id) {
case PRUETH_PORT_MII0:
return ICSS_SLICE0;
case PRUETH_PORT_MII1:
return ICSS_SLICE1;
default:
return -EINVAL;
}
}
extern const struct ethtool_ops icssg_ethtool_ops;
/* Classifier helpers */
void icssg_class_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac);
void icssg_class_set_host_mac_addr(struct regmap *miig_rt, const u8 *mac);
void icssg_class_disable(struct regmap *miig_rt, int slice);
void icssg_class_default(struct regmap *miig_rt, int slice, bool allmulti);
void icssg_ft1_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac_addr);
/* config helpers */
void icssg_config_ipg(struct prueth_emac *emac);
int icssg_config(struct prueth *prueth, struct prueth_emac *emac,
int slice);
int emac_set_port_state(struct prueth_emac *emac,
enum icssg_port_state_cmd state);
void icssg_config_set_speed(struct prueth_emac *emac);
void icssg_config_half_duplex(struct prueth_emac *emac);
/* Buffer queue helpers */
int icssg_queue_pop(struct prueth *prueth, u8 queue);
void icssg_queue_push(struct prueth *prueth, int queue, u16 addr);
u32 icssg_queue_level(struct prueth *prueth, int queue);
#define prueth_napi_to_tx_chn(pnapi) \
container_of(pnapi, struct prueth_tx_chn, napi_tx)
void emac_stats_work_handler(struct work_struct *work);
void emac_update_hardware_stats(struct prueth_emac *emac);
int emac_get_stat_by_name(struct prueth_emac *emac, char *stat_name);
#endif /* __NET_TI_ICSSG_PRUETH_H */
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