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         u32                     rx_buffer_sizes[KNAV_DMA_FDQ_PER_CHAN];
  89         struct napi_struct      rx_napi;
  90         struct napi_struct      tx_napi;
  91
  92         void                    *rx_channel;
  93         const char              *dma_chan_name;
  94         u32                     rx_pool_size;
  95         u32                     rx_pool_region_id;
  96         u32                     tx_pool_size;
  97         u32                     tx_pool_region_id;
  98         struct list_head        module_head;
  99         struct list_head        interface_list;
 100         struct list_head        addr_list;
 101         bool                    netdev_registered;
 102         bool                    primary_module_attached;
 103
 104         /* Lock used for protecting Rx/Tx hook list management */
 105         spinlock_t              lock;
 106         struct netcp_device     *netcp_device;
 107         struct device_node      *node_interface;
 108
 109         /* DMA configuration data */
 110         u32                     msg_enable;
 111         u32                     rx_queue_depths[KNAV_DMA_FDQ_PER_CHAN];
 112 };
 113
 114 #define NETCP_PSDATA_LEN                KNAV_DMA_NUM_PS_WORDS
 115 struct netcp_packet {
 116         struct sk_buff          *skb;
 117         u32                     *epib;
 118         u32                     *psdata;
 119         unsigned int            psdata_len;
 120         struct netcp_intf       *netcp;
 121         struct netcp_tx_pipe    *tx_pipe;
 122         bool                    rxtstamp_complete;
 123         void                    *ts_context;
 124
 125         int     (*txtstamp_complete)(void *ctx, struct netcp_packet *pkt);
 126 };
 127
 128 static inline u32 *netcp_push_psdata(struct netcp_packet *p_info,
 129                                      unsigned int bytes)
 130 {
 131         u32 *buf;
 132         unsigned int words;
 133
 134         if ((bytes & 0x03) != 0)
 135                 return NULL;
 136         words = bytes >> 2;
 137
 138         if ((p_info->psdata_len + words) > NETCP_PSDATA_LEN)
 139                 return NULL;
 140
 141         p_info->psdata_len += words;
 142         buf = &p_info->psdata[NETCP_PSDATA_LEN - p_info->psdata_len];
 143         return buf;
 144 }
 145
 146 static inline int netcp_align_psdata(struct netcp_packet *p_info,
 147                                      unsigned int byte_align)
 148 {
 149         int padding;
 150
 151         switch (byte_align) {
 152         case 0:
 153                 padding = -EINVAL;
 154                 break;
 155         case 1:
 156         case 2:
 157         case 4:
 158                 padding = 0;
 159                 break;
 160         case 8:
 161                 padding = (p_info->psdata_len << 2) % 8;
 162                 break;
 163         case 16:
 164                 padding = (p_info->psdata_len << 2) % 16;
 165                 break;
 166         default:
 167                 padding = (p_info->psdata_len << 2) % byte_align;
 168                 break;
 169         }
 170         return padding;
 171 }
 172
 173 struct netcp_module {
 174         const char              *name;
 175         struct module           *owner;
 176         bool                    primary;
 177
 178         /* probe/remove: called once per NETCP instance */
 179         int     (*probe)(struct netcp_device *netcp_device,
 180                          struct device *device, struct device_node *node,
 181                          void **inst_priv);
 182         int     (*remove)(struct netcp_device *netcp_device, void *inst_priv);
 183
 184         /* attach/release: called once per network interface */
 185         int     (*attach)(void *inst_priv, struct net_device *ndev,
 186                           struct device_node *node, void **intf_priv);
 187         int     (*release)(void *intf_priv);
 188         int     (*open)(void *intf_priv, struct net_device *ndev);
 189         int     (*close)(void *intf_priv, struct net_device *ndev);
 190         int     (*add_addr)(void *intf_priv, struct netcp_addr *naddr);
 191         int     (*del_addr)(void *intf_priv, struct netcp_addr *naddr);
 192         int     (*add_vid)(void *intf_priv, int vid);
 193         int     (*del_vid)(void *intf_priv, int vid);
 194         int     (*ioctl)(void *intf_priv, struct ifreq *req, int cmd);
 195
 196         /* used internally */
 197         struct list_head        module_list;
 198         struct list_head        interface_list;
 199 };
 200
 201 int netcp_register_module(struct netcp_module *module);
 202 void netcp_unregister_module(struct netcp_module *module);
 203 void *netcp_module_get_intf_data(struct netcp_module *module,
 204                                  struct netcp_intf *intf);
 205
 206 int netcp_txpipe_init(struct netcp_tx_pipe *tx_pipe,
 207                       struct netcp_device *netcp_device,
 208                       const char *dma_chan_name, unsigned int dma_queue_id);
 209 int netcp_txpipe_open(struct netcp_tx_pipe *tx_pipe);
 210 int netcp_txpipe_close(struct netcp_tx_pipe *tx_pipe);
 211
 212 typedef int netcp_hook_rtn(int order, void *data, struct netcp_packet *packet);
 213 int netcp_register_txhook(struct netcp_intf *netcp_priv, int order,
 214                           netcp_hook_rtn *hook_rtn, void *hook_data);
 215 int netcp_unregister_txhook(struct netcp_intf *netcp_priv, int order,
 216                             netcp_hook_rtn *hook_rtn, void *hook_data);
 217 int netcp_register_rxhook(struct netcp_intf *netcp_priv, int order,
 218                           netcp_hook_rtn *hook_rtn, void *hook_data);
 219 int netcp_unregister_rxhook(struct netcp_intf *netcp_priv, int order,
 220                             netcp_hook_rtn *hook_rtn, void *hook_data);
 221 void *netcp_device_find_module(struct netcp_device *netcp_device,
 222                                const char *name);
 223
 224 /* SGMII functions */
 225 int netcp_sgmii_reset(void __iomem *sgmii_ofs, int port);
 226 bool netcp_sgmii_rtreset(void __iomem *sgmii_ofs, int port, bool set);
 227 int netcp_sgmii_get_port_link(void __iomem *sgmii_ofs, int port);
 228 int netcp_sgmii_config(void __iomem *sgmii_ofs, int port, u32 interface);
 229
 230 /* XGBE SERDES init functions */
 231 int netcp_xgbe_serdes_init(void __iomem *serdes_regs, void __iomem *xgbe_regs);
 232
 233 #endif  /* __NETCP_H__ */