drivers/net/bcm63xx_enet.h

   1 #ifndef BCM63XX_ENET_H_
   2 #define BCM63XX_ENET_H_
   3
   4 #include <linux/types.h>
   5 #include <linux/mii.h>
   6 #include <linux/mutex.h>
   7 #include <linux/phy.h>
   8 #include <linux/platform_device.h>
   9
  10 #include <bcm63xx_regs.h>
  11 #include <bcm63xx_irq.h>
  12 #include <bcm63xx_io.h>
  13
  14 /* default number of descriptor */
  15 #define BCMENET_DEF_RX_DESC     64
  16 #define BCMENET_DEF_TX_DESC     32
  17
  18 /* maximum burst len for dma (4 bytes unit) */
  19 #define BCMENET_DMA_MAXBURST    16
  20
  21 /* tx transmit threshold (4 bytes unit), fifo is 256 bytes, the value
  22  * must be low enough so that a DMA transfer of above burst length can
  23  * not overflow the fifo  */
  24 #define BCMENET_TX_FIFO_TRESH   32
  25
  26 /*
  27  * hardware maximum rx/tx packet size including FCS, max mtu is
  28  * actually 2047, but if we set max rx size register to 2047 we won't
  29  * get overflow information if packet size is 2048 or above
  30  */
  31 #define BCMENET_MAX_MTU         2046
  32
  33 /*
  34  * rx/tx dma descriptor
  35  */
  36 struct bcm_enet_desc {
  37         u32 len_stat;
  38         u32 address;
  39 };
  40
  41 #define DMADESC_LENGTH_SHIFT    16
  42 #define DMADESC_LENGTH_MASK     (0xfff << DMADESC_LENGTH_SHIFT)
  43 #define DMADESC_OWNER_MASK      (1 << 15)
  44 #define DMADESC_EOP_MASK        (1 << 14)
  45 #define DMADESC_SOP_MASK        (1 << 13)
  46 #define DMADESC_ESOP_MASK       (DMADESC_EOP_MASK | DMADESC_SOP_MASK)
  47 #define DMADESC_WRAP_MASK       (1 << 12)
  48
  49 #define DMADESC_UNDER_MASK      (1 << 9)
  50 #define DMADESC_APPEND_CRC      (1 << 8)
  51 #define DMADESC_OVSIZE_MASK     (1 << 4)
  52 #define DMADESC_RXER_MASK       (1 << 2)
  53 #define DMADESC_CRC_MASK        (1 << 1)
  54 #define DMADESC_OV_MASK         (1 << 0)
  55 #define DMADESC_ERR_MASK        (DMADESC_UNDER_MASK | \
  56                                 DMADESC_OVSIZE_MASK | \
  57                                 DMADESC_RXER_MASK | \
  58                                 DMADESC_CRC_MASK | \
  59                                 DMADESC_OV_MASK)
  60
  61
  62 /*
  63  * MIB Counters register definitions
  64 */
  65 #define ETH_MIB_TX_GD_OCTETS                    0
  66 #define ETH_MIB_TX_GD_PKTS                      1
  67 #define ETH_MIB_TX_ALL_OCTETS                   2
  68 #define ETH_MIB_TX_ALL_PKTS                     3
  69 #define ETH_MIB_TX_BRDCAST                      4
  70 #define ETH_MIB_TX_MULT                         5
  71 #define ETH_MIB_TX_64                           6
  72 #define ETH_MIB_TX_65_127                       7
  73 #define ETH_MIB_TX_128_255                      8
  74 #define ETH_MIB_TX_256_511                      9
  75 #define ETH_MIB_TX_512_1023                     10
  76 #define ETH_MIB_TX_1024_MAX                     11
  77 #define ETH_MIB_TX_JAB                          12
  78 #define ETH_MIB_TX_OVR                          13
  79 #define ETH_MIB_TX_FRAG                         14
  80 #define ETH_MIB_TX_UNDERRUN                     15
  81 #define ETH_MIB_TX_COL                          16
  82 #define ETH_MIB_TX_1_COL                        17
  83 #define ETH_MIB_TX_M_COL                        18
  84 #define ETH_MIB_TX_EX_COL                       19
  85 #define ETH_MIB_TX_LATE                         20
  86 #define ETH_MIB_TX_DEF                          21
  87 #define ETH_MIB_TX_CRS                          22
  88 #define ETH_MIB_TX_PAUSE                        23
  89
  90 #define ETH_MIB_RX_GD_OCTETS                    32
  91 #define ETH_MIB_RX_GD_PKTS                      33
  92 #define ETH_MIB_RX_ALL_OCTETS                   34
  93 #define ETH_MIB_RX_ALL_PKTS                     35
  94 #define ETH_MIB_RX_BRDCAST                      36
  95 #define ETH_MIB_RX_MULT                         37
  96 #define ETH_MIB_RX_64                           38
  97 #define ETH_MIB_RX_65_127                       39
  98 #define ETH_MIB_RX_128_255                      40
  99 #define ETH_MIB_RX_256_511                      41
 100 #define ETH_MIB_RX_512_1023                     42
 101 #define ETH_MIB_RX_1024_MAX                     43
 102 #define ETH_MIB_RX_JAB                          44
 103 #define ETH_MIB_RX_OVR                          45
 104 #define ETH_MIB_RX_FRAG                         46
 105 #define ETH_MIB_RX_DROP                         47
 106 #define ETH_MIB_RX_CRC_ALIGN                    48
 107 #define ETH_MIB_RX_UND                          49
 108 #define ETH_MIB_RX_CRC                          50
 109 #define ETH_MIB_RX_ALIGN                        51
 110 #define ETH_MIB_RX_SYM                          52
 111 #define ETH_MIB_RX_PAUSE                        53
 112 #define ETH_MIB_RX_CNTRL                        54
 113
 114
 115 struct bcm_enet_mib_counters {
 116         u64 tx_gd_octets;
 117         u32 tx_gd_pkts;
 118         u32 tx_all_octets;
 119         u32 tx_all_pkts;
 120         u32 tx_brdcast;
 121         u32 tx_mult;
 122         u32 tx_64;
 123         u32 tx_65_127;
 124         u32 tx_128_255;
 125         u32 tx_256_511;
 126         u32 tx_512_1023;
 127         u32 tx_1024_max;
 128         u32 tx_jab;
 129         u32 tx_ovr;
 130         u32 tx_frag;
 131         u32 tx_underrun;
 132         u32 tx_col;
 133         u32 tx_1_col;
 134         u32 tx_m_col;
 135         u32 tx_ex_col;
 136         u32 tx_late;
 137         u32 tx_def;
 138         u32 tx_crs;
 139         u32 tx_pause;
 140         u64 rx_gd_octets;
 141         u32 rx_gd_pkts;
 142         u32 rx_all_octets;
 143         u32 rx_all_pkts;
 144         u32 rx_brdcast;
 145         u32 rx_mult;
 146         u32 rx_64;
 147         u32 rx_65_127;
 148         u32 rx_128_255;
 149         u32 rx_256_511;
 150         u32 rx_512_1023;
 151         u32 rx_1024_max;
 152         u32 rx_jab;
 153         u32 rx_ovr;
 154         u32 rx_frag;
 155         u32 rx_drop;
 156         u32 rx_crc_align;
 157         u32 rx_und;
 158         u32 rx_crc;
 159         u32 rx_align;
 160         u32 rx_sym;
 161         u32 rx_pause;
 162         u32 rx_cntrl;
 163 };
 164
 165
 166 struct bcm_enet_priv {
 167
 168         /* mac id (from platform device id) */
 169         int mac_id;
 170
 171         /* base remapped address of device */
 172         void __iomem *base;
 173
 174         /* mac irq, rx_dma irq, tx_dma irq */
 175         int irq;
 176         int irq_rx;
 177         int irq_tx;
 178
 179         /* hw view of rx & tx dma ring */
 180         dma_addr_t rx_desc_dma;
 181         dma_addr_t tx_desc_dma;
 182
 183         /* allocated size (in bytes) for rx & tx dma ring */
 184         unsigned int rx_desc_alloc_size;
 185         unsigned int tx_desc_alloc_size;
 186
 187
 188         struct napi_struct napi;
 189
 190         /* dma channel id for rx */
 191         int rx_chan;
 192
 193         /* number of dma desc in rx ring */
 194         int rx_ring_size;
 195
 196         /* cpu view of rx dma ring */
 197         struct bcm_enet_desc *rx_desc_cpu;
 198
 199         /* current number of armed descriptor given to hardware for rx */
 200         int rx_desc_count;
 201
 202         /* next rx descriptor to fetch from hardware */
 203         int rx_curr_desc;
 204
 205         /* next dirty rx descriptor to refill */
 206         int rx_dirty_desc;
 207
 208         /* size of allocated rx skbs */
 209         unsigned int rx_skb_size;
 210
 211         /* list of skb given to hw for rx */
 212         struct sk_buff **rx_skb;
 213
 214         /* used when rx skb allocation failed, so we defer rx queue
 215          * refill */
 216         struct timer_list rx_timeout;
 217
 218         /* lock rx_timeout against rx normal operation */
 219         spinlock_t rx_lock;
 220
 221
 222         /* dma channel id for tx */
 223         int tx_chan;
 224
 225         /* number of dma desc in tx ring */
 226         int tx_ring_size;
 227
 228         /* cpu view of rx dma ring */
 229         struct bcm_enet_desc *tx_desc_cpu;
 230
 231         /* number of available descriptor for tx */
 232         int tx_desc_count;
 233
 234         /* next tx descriptor avaiable */
 235         int tx_curr_desc;
 236
 237         /* next dirty tx descriptor to reclaim */
 238         int tx_dirty_desc;
 239
 240         /* list of skb given to hw for tx */
 241         struct sk_buff **tx_skb;
 242
 243         /* lock used by tx reclaim and xmit */
 244         spinlock_t tx_lock;
 245
 246
 247         /* set if internal phy is ignored and external mii interface
 248          * is selected */
 249         int use_external_mii;
 250
 251         /* set if a phy is connected, phy address must be known,
 252          * probing is not possible */
 253         int has_phy;
 254         int phy_id;
 255
 256         /* set if connected phy has an associated irq */
 257         int has_phy_interrupt;
 258         int phy_interrupt;
 259
 260         /* used when a phy is connected (phylib used) */
 261         struct mii_bus *mii_bus;
 262         struct phy_device *phydev;
 263         int old_link;
 264         int old_duplex;
 265         int old_pause;
 266
 267         /* used when no phy is connected */
 268         int force_speed_100;
 269         int force_duplex_full;
 270
 271         /* pause parameters */
 272         int pause_auto;
 273         int pause_rx;
 274         int pause_tx;
 275
 276         /* stats */
 277         struct bcm_enet_mib_counters mib;
 278
 279         /* after mib interrupt, mib registers update is done in this
 280          * work queue */
 281         struct work_struct mib_update_task;
 282
 283         /* lock mib update between userspace request and workqueue */
 284         struct mutex mib_update_lock;
 285
 286         /* mac clock */
 287         struct clk *mac_clk;
 288
 289         /* phy clock if internal phy is used */
 290         struct clk *phy_clk;
 291
 292         /* network device reference */
 293         struct net_device *net_dev;
 294
 295         /* platform device reference */
 296         struct platform_device *pdev;
 297
 298         /* maximum hardware transmit/receive size */
 299         unsigned int hw_mtu;
 300 };
 301
 302 #endif /* ! BCM63XX_ENET_H_ */