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