drivers/net/ethernet/ti/netcp.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * NetCP driver local header
   4  *
   5  * Copyright (C) 2014 Texas Instruments Incorporated
   6  * Authors:     Sandeep Nair <sandeep_n@ti.com>
   7  *              Sandeep Paulraj <s-paulraj@ti.com>
   8  *              Cyril Chemparathy <cyril@ti.com>
   9  *              Santosh Shilimkar <santosh.shilimkar@ti.com>
  10  *              Wingman Kwok <w-kwok2@ti.com>
  11  *              Murali Karicheri <m-karicheri2@ti.com>
  12  */
  13 #ifndef __NETCP_H__
  14 #define __NETCP_H__
  15
  16 #include <linux/netdevice.h>
  17 #include <linux/soc/ti/knav_dma.h>
  18 #include <linux/u64_stats_sync.h>
  19
  20 /* Maximum Ethernet frame size supported by Keystone switch */
  21 #define NETCP_MAX_FRAME_SIZE            9504
  22
  23 #define SGMII_LINK_MAC_MAC_AUTONEG      0
  24 #define SGMII_LINK_MAC_PHY              1
  25 #define SGMII_LINK_MAC_MAC_FORCED       2
  26 #define SGMII_LINK_MAC_FIBER            3
  27 #define SGMII_LINK_MAC_PHY_NO_MDIO      4
  28 #define RGMII_LINK_MAC_PHY              5
  29 #define RGMII_LINK_MAC_PHY_NO_MDIO      7
  30 #define XGMII_LINK_MAC_PHY              10
  31 #define XGMII_LINK_MAC_MAC_FORCED       11
  32
  33 struct netcp_device;
  34
  35 struct netcp_tx_pipe {
  36         struct netcp_device     *netcp_device;
  37         void                    *dma_queue;
  38         unsigned int            dma_queue_id;
  39         /* To port for packet forwarded to switch. Used only by ethss */
  40         u8                      switch_to_port;
  41 #define SWITCH_TO_PORT_IN_TAGINFO       BIT(0)
  42         u8                      flags;
  43         void                    *dma_channel;
  44         const char              *dma_chan_name;
  45 };
  46
  47 #define ADDR_NEW                        BIT(0)
  48 #define ADDR_VALID                      BIT(1)
  49
  50 enum netcp_addr_type {
  51         ADDR_ANY,
  52         ADDR_DEV,
  53         ADDR_UCAST,
  54         ADDR_MCAST,
  55         ADDR_BCAST
  56 };
  57
  58 struct netcp_addr {
  59         struct netcp_intf       *netcp;
  60         unsigned char           addr[ETH_ALEN];
  61         enum netcp_addr_type    type;
  62         unsigned int            flags;
  63         struct list_head        node;
  64 };
  65
  66 struct netcp_stats {
  67         struct u64_stats_sync   syncp_rx ____cacheline_aligned_in_smp;
  68         u64                     rx_packets;
  69         u64                     rx_bytes;
  70         u32                     rx_errors;
  71         u32                     rx_dropped;
  72
  73         struct u64_stats_sync   syncp_tx ____cacheline_aligned_in_smp;
  74         u64                     tx_packets;
  75         u64                     tx_bytes;
  76         u32                     tx_errors;
  77         u32                     tx_dropped;
  78 };
  79
  80 struct netcp_intf {
  81         struct device           *dev;
  82         struct device           *ndev_dev;
  83         struct net_device       *ndev;
  84         bool                    big_endian;
  85         unsigned int            tx_compl_qid;
  86         void                    *tx_pool;
  87         struct list_head        txhook_list_head;
  88         unsigned int            tx_pause_threshold;
  89         void                    *tx_compl_q;
  90
  91         unsigned int            tx_resume_threshold;
  92         void                    *rx_queue;
  93         void                    *rx_pool;
  94         struct list_head        rxhook_list_head;
  95         unsigned int            rx_queue_id;
  96         void                    *rx_fdq[KNAV_DMA_FDQ_PER_CHAN];
  97         struct napi_struct      rx_napi;
  98         struct napi_struct      tx_napi;
  99 #define ETH_SW_CAN_REMOVE_ETH_FCS       BIT(0)
 100         u32                     hw_cap;
 101
 102         /* 64-bit netcp stats */
 103         struct netcp_stats      stats;
 104
 105         void                    *rx_channel;
 106         const char              *dma_chan_name;
 107         u32                     rx_pool_size;
 108         u32                     rx_pool_region_id;
 109         u32                     tx_pool_size;
 110         u32                     tx_pool_region_id;
 111         struct list_head        module_head;
 112         struct list_head        interface_list;
 113         struct list_head        addr_list;
 114         bool                    netdev_registered;
 115         bool                    primary_module_attached;
 116
 117         /* Lock used for protecting Rx/Tx hook list management */
 118         spinlock_t              lock;
 119         struct netcp_device     *netcp_device;
 120         struct device_node      *node_interface;
 121
 122         /* DMA configuration data */
 123         u32                     msg_enable;
 124         u32                     rx_queue_depths[KNAV_DMA_FDQ_PER_CHAN];
 125 };
 126
 127 #define NETCP_PSDATA_LEN                KNAV_DMA_NUM_PS_WORDS
 128 struct netcp_packet {
 129         struct sk_buff          *skb;
 130         __le32                  *epib;
 131         u32                     *psdata;
 132         u32                     eflags;
 133         unsigned int            psdata_len;
 134         struct netcp_intf       *netcp;
 135         struct netcp_tx_pipe    *tx_pipe;
 136         bool                    rxtstamp_complete;
 137         void                    *ts_context;
 138
 139         void (*txtstamp)(void *ctx, struct sk_buff *skb);
 140 };
 141
 142 static inline u32 *netcp_push_psdata(struct netcp_packet *p_info,
 143                                      unsigned int bytes)
 144 {
 145         u32 *buf;
 146         unsigned int words;
 147
 148         if ((bytes & 0x03) != 0)
 149                 return NULL;
 150         words = bytes >> 2;
 151
 152         if ((p_info->psdata_len + words) > NETCP_PSDATA_LEN)
 153                 return NULL;
 154
 155         p_info->psdata_len += words;
 156         buf = &p_info->psdata[NETCP_PSDATA_LEN - p_info->psdata_len];
 157         return buf;
 158 }
 159
 160 static inline int netcp_align_psdata(struct netcp_packet *p_info,
 161                                      unsigned int byte_align)
 162 {
 163         int padding;
 164
 165         switch (byte_align) {
 166         case 0:
 167                 padding = -EINVAL;
 168                 break;
 169         case 1:
 170         case 2:
 171         case 4:
 172                 padding = 0;
 173                 break;
 174         case 8:
 175                 padding = (p_info->psdata_len << 2) % 8;
 176                 break;
 177         case 16:
 178                 padding = (p_info->psdata_len << 2) % 16;
 179                 break;
 180         default:
 181                 padding = (p_info->psdata_len << 2) % byte_align;
 182                 break;
 183         }
 184         return padding;
 185 }
 186
 187 struct netcp_module {
 188         const char              *name;
 189         struct module           *owner;
 190         bool                    primary;
 191
 192         /* probe/remove: called once per NETCP instance */
 193         int     (*probe)(struct netcp_device *netcp_device,
 194                          struct device *device, struct device_node *node,
 195                          void **inst_priv);
 196         int     (*remove)(struct netcp_device *netcp_device, void *inst_priv);
 197
 198         /* attach/release: called once per network interface */
 199         int     (*attach)(void *inst_priv, struct net_device *ndev,
 200                           struct device_node *node, void **intf_priv);
 201         int     (*release)(void *intf_priv);
 202         int     (*open)(void *intf_priv, struct net_device *ndev);
 203         int     (*close)(void *intf_priv, struct net_device *ndev);
 204         int     (*add_addr)(void *intf_priv, struct netcp_addr *naddr);
 205         int     (*del_addr)(void *intf_priv, struct netcp_addr *naddr);
 206         int     (*add_vid)(void *intf_priv, int vid);
 207         int     (*del_vid)(void *intf_priv, int vid);
 208         int     (*ioctl)(void *intf_priv, struct ifreq *req, int cmd);
 209         int     (*set_rx_mode)(void *intf_priv, bool promisc);
 210
 211         /* used internally */
 212         struct list_head        module_list;
 213         struct list_head        interface_list;
 214 };
 215
 216 int netcp_register_module(struct netcp_module *module);
 217 void netcp_unregister_module(struct netcp_module *module);
 218 void *netcp_module_get_intf_data(struct netcp_module *module,
 219                                  struct netcp_intf *intf);
 220
 221 int netcp_txpipe_init(struct netcp_tx_pipe *tx_pipe,
 222                       struct netcp_device *netcp_device,
 223                       const char *dma_chan_name, unsigned int dma_queue_id);
 224 int netcp_txpipe_open(struct netcp_tx_pipe *tx_pipe);
 225 int netcp_txpipe_close(struct netcp_tx_pipe *tx_pipe);
 226
 227 typedef int netcp_hook_rtn(int order, void *data, struct netcp_packet *packet);
 228 int netcp_register_txhook(struct netcp_intf *netcp_priv, int order,
 229                           netcp_hook_rtn *hook_rtn, void *hook_data);
 230 int netcp_unregister_txhook(struct netcp_intf *netcp_priv, int order,
 231                             netcp_hook_rtn *hook_rtn, void *hook_data);
 232 int netcp_register_rxhook(struct netcp_intf *netcp_priv, int order,
 233                           netcp_hook_rtn *hook_rtn, void *hook_data);
 234 int netcp_unregister_rxhook(struct netcp_intf *netcp_priv, int order,
 235                             netcp_hook_rtn *hook_rtn, void *hook_data);
 236 void *netcp_device_find_module(struct netcp_device *netcp_device,
 237                                const char *name);
 238
 239 /* SGMII functions */
 240 int netcp_sgmii_reset(void __iomem *sgmii_ofs, int port);
 241 bool netcp_sgmii_rtreset(void __iomem *sgmii_ofs, int port, bool set);
 242 int netcp_sgmii_get_port_link(void __iomem *sgmii_ofs, int port);
 243 int netcp_sgmii_config(void __iomem *sgmii_ofs, int port, u32 interface);
 244
 245 /* XGBE SERDES init functions */
 246 int netcp_xgbe_serdes_init(void __iomem *serdes_regs, void __iomem *xgbe_regs);
 247
 248 #endif  /* __NETCP_H__ */