drivers/net/ethernet/ti/netcp.h

   1 /*
   2  * NetCP driver local header
   3  *
   4  * Copyright (C) 2014 Texas Instruments Incorporated
   5  * Authors:     Sandeep Nair <sandeep_n@ti.com>
   6  *              Sandeep Paulraj <s-paulraj@ti.com>
   7  *              Cyril Chemparathy <cyril@ti.com>
   8  *              Santosh Shilimkar <santosh.shilimkar@ti.com>
   9  *              Wingman Kwok <w-kwok2@ti.com>
  10  *              Murali Karicheri <m-karicheri2@ti.com>
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation version 2.
  15  *
  16  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  17  * kind, whether express or implied; without even the implied warranty
  18  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  */
  21 #ifndef __NETCP_H__
  22 #define __NETCP_H__
  23
  24 #include <linux/netdevice.h>
  25 #include <linux/soc/ti/knav_dma.h>
  26 #include <linux/u64_stats_sync.h>
  27
  28 /* Maximum Ethernet frame size supported by Keystone switch */
  29 #define NETCP_MAX_FRAME_SIZE            9504
  30
  31 #define SGMII_LINK_MAC_MAC_AUTONEG      0
  32 #define SGMII_LINK_MAC_PHY              1
  33 #define SGMII_LINK_MAC_MAC_FORCED       2
  34 #define SGMII_LINK_MAC_FIBER            3
  35 #define SGMII_LINK_MAC_PHY_NO_MDIO      4
  36 #define XGMII_LINK_MAC_PHY              10
  37 #define XGMII_LINK_MAC_MAC_FORCED       11
  38
  39 struct netcp_device;
  40
  41 struct netcp_tx_pipe {
  42         struct netcp_device     *netcp_device;
  43         void                    *dma_queue;
  44         unsigned int            dma_queue_id;
  45         /* To port for packet forwarded to switch. Used only by ethss */
  46         u8                      switch_to_port;
  47 #define SWITCH_TO_PORT_IN_TAGINFO       BIT(0)
  48         u8                      flags;
  49         void                    *dma_channel;
  50         const char              *dma_chan_name;
  51 };
  52
  53 #define ADDR_NEW                        BIT(0)
  54 #define ADDR_VALID                      BIT(1)
  55
  56 enum netcp_addr_type {
  57         ADDR_ANY,
  58         ADDR_DEV,
  59         ADDR_UCAST,
  60         ADDR_MCAST,
  61         ADDR_BCAST
  62 };
  63
  64 struct netcp_addr {
  65         struct netcp_intf       *netcp;
  66         unsigned char           addr[ETH_ALEN];
  67         enum netcp_addr_type    type;
  68         unsigned int            flags;
  69         struct list_head        node;
  70 };
  71
  72 struct netcp_stats {
  73         struct u64_stats_sync   syncp_rx ____cacheline_aligned_in_smp;
  74         u64                     rx_packets;
  75         u64                     rx_bytes;
  76         u32                     rx_errors;
  77         u32                     rx_dropped;
  78
  79         struct u64_stats_sync   syncp_tx ____cacheline_aligned_in_smp;
  80         u64                     tx_packets;
  81         u64                     tx_bytes;
  82         u32                     tx_errors;
  83         u32                     tx_dropped;
  84 };
  85
  86 struct netcp_intf {
  87         struct device           *dev;
  88         struct device           *ndev_dev;
  89         struct net_device       *ndev;
  90         bool                    big_endian;
  91         unsigned int            tx_compl_qid;
  92         void                    *tx_pool;
  93         struct list_head        txhook_list_head;
  94         unsigned int            tx_pause_threshold;
  95         void                    *tx_compl_q;
  96
  97         unsigned int            tx_resume_threshold;
  98         void                    *rx_queue;
  99         void                    *rx_pool;
 100         struct list_head        rxhook_list_head;
 101         unsigned int            rx_queue_id;
 102         void                    *rx_fdq[KNAV_DMA_FDQ_PER_CHAN];
 103         struct napi_struct      rx_napi;
 104         struct napi_struct      tx_napi;
 105 #define ETH_SW_CAN_REMOVE_ETH_FCS       BIT(0)
 106         u32                     hw_cap;
 107
 108         /* 64-bit netcp stats */
 109         struct netcp_stats      stats;
 110
 111         void                    *rx_channel;
 112         const char              *dma_chan_name;
 113         u32                     rx_pool_size;
 114         u32                     rx_pool_region_id;
 115         u32                     tx_pool_size;
 116         u32                     tx_pool_region_id;
 117         struct list_head        module_head;
 118         struct list_head        interface_list;
 119         struct list_head        addr_list;
 120         bool                    netdev_registered;
 121         bool                    primary_module_attached;
 122
 123         /* Lock used for protecting Rx/Tx hook list management */
 124         spinlock_t              lock;
 125         struct netcp_device     *netcp_device;
 126         struct device_node      *node_interface;
 127
 128         /* DMA configuration data */
 129         u32                     msg_enable;
 130         u32                     rx_queue_depths[KNAV_DMA_FDQ_PER_CHAN];
 131 };
 132
 133 #define NETCP_PSDATA_LEN                KNAV_DMA_NUM_PS_WORDS
 134 struct netcp_packet {
 135         struct sk_buff          *skb;
 136         __le32                  *epib;
 137         u32                     *psdata;
 138         u32                     eflags;
 139         unsigned int            psdata_len;
 140         struct netcp_intf       *netcp;
 141         struct netcp_tx_pipe    *tx_pipe;
 142         bool                    rxtstamp_complete;
 143         void                    *ts_context;
 144
 145         void (*txtstamp)(void *ctx, struct sk_buff *skb);
 146 };
 147
 148 static inline u32 *netcp_push_psdata(struct netcp_packet *p_info,
 149                                      unsigned int bytes)
 150 {
 151         u32 *buf;
 152         unsigned int words;
 153
 154         if ((bytes & 0x03) != 0)
 155                 return NULL;
 156         words = bytes >> 2;
 157
 158         if ((p_info->psdata_len + words) > NETCP_PSDATA_LEN)
 159                 return NULL;
 160
 161         p_info->psdata_len += words;
 162         buf = &p_info->psdata[NETCP_PSDATA_LEN - p_info->psdata_len];
 163         return buf;
 164 }
 165
 166 static inline int netcp_align_psdata(struct netcp_packet *p_info,
 167                                      unsigned int byte_align)
 168 {
 169         int padding;
 170
 171         switch (byte_align) {
 172         case 0:
 173                 padding = -EINVAL;
 174                 break;
 175         case 1:
 176         case 2:
 177         case 4:
 178                 padding = 0;
 179                 break;
 180         case 8:
 181                 padding = (p_info->psdata_len << 2) % 8;
 182                 break;
 183         case 16:
 184                 padding = (p_info->psdata_len << 2) % 16;
 185                 break;
 186         default:
 187                 padding = (p_info->psdata_len << 2) % byte_align;
 188                 break;
 189         }
 190         return padding;
 191 }
 192
 193 struct netcp_module {
 194         const char              *name;
 195         struct module           *owner;
 196         bool                    primary;
 197
 198         /* probe/remove: called once per NETCP instance */
 199         int     (*probe)(struct netcp_device *netcp_device,
 200                          struct device *device, struct device_node *node,
 201                          void **inst_priv);
 202         int     (*remove)(struct netcp_device *netcp_device, void *inst_priv);
 203
 204         /* attach/release: called once per network interface */
 205         int     (*attach)(void *inst_priv, struct net_device *ndev,
 206                           struct device_node *node, void **intf_priv);
 207         int     (*release)(void *intf_priv);
 208         int     (*open)(void *intf_priv, struct net_device *ndev);
 209         int     (*close)(void *intf_priv, struct net_device *ndev);
 210         int     (*add_addr)(void *intf_priv, struct netcp_addr *naddr);
 211         int     (*del_addr)(void *intf_priv, struct netcp_addr *naddr);
 212         int     (*add_vid)(void *intf_priv, int vid);
 213         int     (*del_vid)(void *intf_priv, int vid);
 214         int     (*ioctl)(void *intf_priv, struct ifreq *req, int cmd);
 215
 216         /* used internally */
 217         struct list_head        module_list;
 218         struct list_head        interface_list;
 219 };
 220
 221 int netcp_register_module(struct netcp_module *module);
 222 void netcp_unregister_module(struct netcp_module *module);
 223 void *netcp_module_get_intf_data(struct netcp_module *module,
 224                                  struct netcp_intf *intf);
 225
 226 int netcp_txpipe_init(struct netcp_tx_pipe *tx_pipe,
 227                       struct netcp_device *netcp_device,
 228                       const char *dma_chan_name, unsigned int dma_queue_id);
 229 int netcp_txpipe_open(struct netcp_tx_pipe *tx_pipe);
 230 int netcp_txpipe_close(struct netcp_tx_pipe *tx_pipe);
 231
 232 typedef int netcp_hook_rtn(int order, void *data, struct netcp_packet *packet);
 233 int netcp_register_txhook(struct netcp_intf *netcp_priv, int order,
 234                           netcp_hook_rtn *hook_rtn, void *hook_data);
 235 int netcp_unregister_txhook(struct netcp_intf *netcp_priv, int order,
 236                             netcp_hook_rtn *hook_rtn, void *hook_data);
 237 int netcp_register_rxhook(struct netcp_intf *netcp_priv, int order,
 238                           netcp_hook_rtn *hook_rtn, void *hook_data);
 239 int netcp_unregister_rxhook(struct netcp_intf *netcp_priv, int order,
 240                             netcp_hook_rtn *hook_rtn, void *hook_data);
 241 void *netcp_device_find_module(struct netcp_device *netcp_device,
 242                                const char *name);
 243
 244 /* SGMII functions */
 245 int netcp_sgmii_reset(void __iomem *sgmii_ofs, int port);
 246 bool netcp_sgmii_rtreset(void __iomem *sgmii_ofs, int port, bool set);
 247 int netcp_sgmii_get_port_link(void __iomem *sgmii_ofs, int port);
 248 int netcp_sgmii_config(void __iomem *sgmii_ofs, int port, u32 interface);
 249
 250 /* XGBE SERDES init functions */
 251 int netcp_xgbe_serdes_init(void __iomem *serdes_regs, void __iomem *xgbe_regs);
 252
 253 #endif  /* __NETCP_H__ */