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/*
* NetCP driver local header
*
* Copyright (C) 2014 Texas Instruments Incorporated
* Authors: Sandeep Nair <sandeep_n@ti.com>
* Sandeep Paulraj <s-paulraj@ti.com>
* Cyril Chemparathy <cyril@ti.com>
* Santosh Shilimkar <santosh.shilimkar@ti.com>
* Wingman Kwok <w-kwok2@ti.com>
* Murali Karicheri <m-karicheri2@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __NETCP_H__
#define __NETCP_H__
#include <linux/netdevice.h>
#include <linux/soc/ti/knav_dma.h>
#include <linux/u64_stats_sync.h>
/* Maximum Ethernet frame size supported by Keystone switch */
#define NETCP_MAX_FRAME_SIZE 9504
/* to indicate netcp core should drop the packet */
#define NETCP_TX_DROP 1
#define SGMII_LINK_MAC_MAC_AUTONEG 0
#define SGMII_LINK_MAC_PHY 1
#define SGMII_LINK_MAC_MAC_FORCED 2
#define SGMII_LINK_MAC_FIBER 3
#define SGMII_LINK_MAC_PHY_NO_MDIO 4
#define RGMII_LINK_MAC_PHY 5
#define RGMII_LINK_MAC_MAC_FORCED 6
#define RGMII_LINK_MAC_PHY_NO_MDIO 7
#define XGMII_LINK_MAC_PHY 10
#define XGMII_LINK_MAC_MAC_FORCED 11
#define NETCP_MAX_SUBQUEUES 32
struct netcp_device;
struct netcp_tx_pipe {
struct netcp_device *netcp_device;
void *dma_queue;
unsigned int dma_queue_id;
/* To port for packet forwarded to switch. Used only by ethss */
u8 switch_to_port;
#define SWITCH_TO_PORT_IN_TAGINFO BIT(0)
u8 flags;
void *dma_channel;
const char *dma_chan_name;
};
#define ADDR_NEW BIT(0)
#define ADDR_VALID BIT(1)
enum netcp_addr_type {
ADDR_ANY,
ADDR_DEV,
ADDR_UCAST,
ADDR_MCAST,
ADDR_BCAST
};
struct netcp_addr {
struct netcp_intf *netcp;
unsigned char addr[ETH_ALEN];
enum netcp_addr_type type;
unsigned int flags;
struct list_head node;
};
struct netcp_stats {
struct u64_stats_sync syncp_rx ____cacheline_aligned_in_smp;
u64 rx_packets;
u64 rx_bytes;
u32 rx_errors;
u32 rx_dropped;
struct u64_stats_sync syncp_tx ____cacheline_aligned_in_smp;
u64 tx_packets;
u64 tx_bytes;
u32 tx_errors;
u32 tx_dropped;
};
struct netcp_pool_info {
u32 num_descs;
u32 region_id;
unsigned int pause_threshold;
unsigned int resume_threshold;
void *pool;
};
struct netcp_intf {
struct device *dev;
struct device *ndev_dev;
struct net_device *ndev;
bool big_endian;
bool bridged;
u32 tx_subqueues;
unsigned int tx_compl_qid;
u32 tx_compl_budget;
void *tx_compl_q;
struct list_head txhook_list_head;
void *rx_queue;
void *rx_pool;
struct list_head rxhook_list_head;
unsigned int rx_queue_id;
void *rx_fdq[KNAV_DMA_FDQ_PER_CHAN];
struct napi_struct rx_napi;
struct napi_struct tx_napi;
#define ETH_SW_CAN_REMOVE_ETH_FCS BIT(0)
u32 hw_cap;
/* 64-bit netcp stats */
struct netcp_stats stats;
u32 rx_queue_depths[KNAV_DMA_FDQ_PER_CHAN];
/* Non Data path related stuffs below. In future, move any variable
* if used on data path to above this for better cache line use
*/
void *rx_channel;
const char *dma_chan_name;
u32 rx_pool_size;
u32 rx_pool_region_id;
struct list_head module_head;
struct list_head interface_list;
struct list_head addr_list;
bool netdev_registered;
bool primary_module_attached;
/* Lock used for protecting Rx/Tx hook list management */
spinlock_t lock;
struct netcp_device *netcp_device;
struct device_node *node_interface;
/* DMA configuration data */
u32 msg_enable;
struct netcp_pool_info tx_pool[1];
/* NB: tx-pools (#tx-subqueues) are allocated dynamically */
};
#define NETCP_EPIB_LEN KNAV_DMA_NUM_EPIB_WORDS
#define NETCP_PSDATA_LEN KNAV_DMA_NUM_PS_WORDS
struct netcp_packet {
struct sk_buff *skb;
u32 *epib;
u32 *psdata;
u32 eflags;
unsigned int psdata_len;
struct netcp_intf *netcp;
struct netcp_tx_pipe *tx_pipe;
bool rxtstamp_complete;
void *ts_context;
void (*txtstamp)(void *ctx, struct sk_buff *skb);
};
static inline u32 *netcp_push_psdata(struct netcp_packet *p_info,
unsigned int bytes)
{
u32 *buf;
unsigned int words;
if ((bytes & 0x03) != 0)
return NULL;
words = bytes >> 2;
if ((p_info->psdata_len + words) > NETCP_PSDATA_LEN)
return NULL;
p_info->psdata_len += words;
buf = &p_info->psdata[NETCP_PSDATA_LEN - p_info->psdata_len];
return buf;
}
static inline int netcp_align_psdata(struct netcp_packet *p_info,
unsigned int byte_align)
{
int padding;
switch (byte_align) {
case 0:
padding = -EINVAL;
break;
case 1:
case 2:
case 4:
padding = 0;
break;
case 8:
padding = (p_info->psdata_len << 2) % 8;
break;
case 16:
padding = (p_info->psdata_len << 2) % 16;
break;
default:
padding = (p_info->psdata_len << 2) % byte_align;
break;
}
return padding;
}
struct netcp_module {
const char *name;
struct module *owner;
bool primary;
/* probe/remove: called once per NETCP instance */
int (*probe)(struct netcp_device *netcp_device,
struct device *device, struct device_node *node,
void **inst_priv);
int (*remove)(struct netcp_device *netcp_device, void *inst_priv);
/* attach/release: called once per network interface */
int (*attach)(void *inst_priv, struct net_device *ndev,
struct device_node *node, void **intf_priv);
int (*release)(void *intf_priv);
int (*open)(void *intf_priv, struct net_device *ndev);
int (*close)(void *intf_priv, struct net_device *ndev);
int (*add_addr)(void *intf_priv, struct netcp_addr *naddr);
int (*del_addr)(void *intf_priv, struct netcp_addr *naddr);
int (*add_vid)(void *intf_priv, int vid);
int (*del_vid)(void *intf_priv, int vid);
int (*ioctl)(void *intf_priv, struct ifreq *req, int cmd);
int (*set_rx_mode)(void *intf_priv, bool promisc);
/* used internally */
struct list_head module_list;
struct list_head interface_list;
};
int netcp_register_module(struct netcp_module *module);
void netcp_unregister_module(struct netcp_module *module);
void *netcp_module_get_intf_data(struct netcp_module *module,
struct netcp_intf *intf);
int netcp_txpipe_init(struct netcp_tx_pipe *tx_pipe,
struct netcp_device *netcp_device,
const char *dma_chan_name, unsigned int dma_queue_id);
int netcp_txpipe_open(struct netcp_tx_pipe *tx_pipe);
int netcp_txpipe_close(struct netcp_tx_pipe *tx_pipe);
typedef int netcp_hook_rtn(int order, void *data, struct netcp_packet *packet);
int netcp_register_txhook(struct netcp_intf *netcp_priv, int order,
netcp_hook_rtn *hook_rtn, void *hook_data);
int netcp_unregister_txhook(struct netcp_intf *netcp_priv, int order,
netcp_hook_rtn *hook_rtn, void *hook_data);
int netcp_register_rxhook(struct netcp_intf *netcp_priv, int order,
netcp_hook_rtn *hook_rtn, void *hook_data);
int netcp_unregister_rxhook(struct netcp_intf *netcp_priv, int order,
netcp_hook_rtn *hook_rtn, void *hook_data);
void *netcp_device_find_module(struct netcp_device *netcp_device,
const char *name);
/* SGMII functions */
int netcp_sgmii_reset(void __iomem *sgmii_ofs, int port);
bool netcp_sgmii_rtreset(void __iomem *sgmii_ofs, int port, bool set);
int netcp_sgmii_get_port_link(void __iomem *sgmii_ofs, int port);
int netcp_sgmii_config(void __iomem *sgmii_ofs, int port, u32 interface);
/* XGBE SERDES init functions */
int netcp_xgbe_serdes_init(void __iomem *serdes_regs, void __iomem *xgbe_regs);
#endif /* __NETCP_H__ */
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