root/drivers/net/ethernet/broadcom/bcm63xx_enet.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef BCM63XX_ENET_H_
   3 #define BCM63XX_ENET_H_
   4 
   5 #include <linux/types.h>
   6 #include <linux/mii.h>
   7 #include <linux/mutex.h>
   8 #include <linux/phy.h>
   9 #include <linux/platform_device.h>
  10 
  11 #include <bcm63xx_regs.h>
  12 #include <bcm63xx_io.h>
  13 #include <bcm63xx_iudma.h>
  14 
  15 /* default number of descriptor */
  16 #define BCMENET_DEF_RX_DESC     64
  17 #define BCMENET_DEF_TX_DESC     32
  18 
  19 /* maximum burst len for dma (4 bytes unit) */
  20 #define BCMENET_DMA_MAXBURST    16
  21 #define BCMENETSW_DMA_MAXBURST  8
  22 
  23 /* tx transmit threshold (4 bytes unit), fifo is 256 bytes, the value
  24  * must be low enough so that a DMA transfer of above burst length can
  25  * not overflow the fifo  */
  26 #define BCMENET_TX_FIFO_TRESH   32
  27 
  28 /*
  29  * hardware maximum rx/tx packet size including FCS, max mtu is
  30  * actually 2047, but if we set max rx size register to 2047 we won't
  31  * get overflow information if packet size is 2048 or above
  32  */
  33 #define BCMENET_MAX_MTU         2046
  34 
  35 /*
  36  * MIB Counters register definitions
  37 */
  38 #define ETH_MIB_TX_GD_OCTETS                    0
  39 #define ETH_MIB_TX_GD_PKTS                      1
  40 #define ETH_MIB_TX_ALL_OCTETS                   2
  41 #define ETH_MIB_TX_ALL_PKTS                     3
  42 #define ETH_MIB_TX_BRDCAST                      4
  43 #define ETH_MIB_TX_MULT                         5
  44 #define ETH_MIB_TX_64                           6
  45 #define ETH_MIB_TX_65_127                       7
  46 #define ETH_MIB_TX_128_255                      8
  47 #define ETH_MIB_TX_256_511                      9
  48 #define ETH_MIB_TX_512_1023                     10
  49 #define ETH_MIB_TX_1024_MAX                     11
  50 #define ETH_MIB_TX_JAB                          12
  51 #define ETH_MIB_TX_OVR                          13
  52 #define ETH_MIB_TX_FRAG                         14
  53 #define ETH_MIB_TX_UNDERRUN                     15
  54 #define ETH_MIB_TX_COL                          16
  55 #define ETH_MIB_TX_1_COL                        17
  56 #define ETH_MIB_TX_M_COL                        18
  57 #define ETH_MIB_TX_EX_COL                       19
  58 #define ETH_MIB_TX_LATE                         20
  59 #define ETH_MIB_TX_DEF                          21
  60 #define ETH_MIB_TX_CRS                          22
  61 #define ETH_MIB_TX_PAUSE                        23
  62 
  63 #define ETH_MIB_RX_GD_OCTETS                    32
  64 #define ETH_MIB_RX_GD_PKTS                      33
  65 #define ETH_MIB_RX_ALL_OCTETS                   34
  66 #define ETH_MIB_RX_ALL_PKTS                     35
  67 #define ETH_MIB_RX_BRDCAST                      36
  68 #define ETH_MIB_RX_MULT                         37
  69 #define ETH_MIB_RX_64                           38
  70 #define ETH_MIB_RX_65_127                       39
  71 #define ETH_MIB_RX_128_255                      40
  72 #define ETH_MIB_RX_256_511                      41
  73 #define ETH_MIB_RX_512_1023                     42
  74 #define ETH_MIB_RX_1024_MAX                     43
  75 #define ETH_MIB_RX_JAB                          44
  76 #define ETH_MIB_RX_OVR                          45
  77 #define ETH_MIB_RX_FRAG                         46
  78 #define ETH_MIB_RX_DROP                         47
  79 #define ETH_MIB_RX_CRC_ALIGN                    48
  80 #define ETH_MIB_RX_UND                          49
  81 #define ETH_MIB_RX_CRC                          50
  82 #define ETH_MIB_RX_ALIGN                        51
  83 #define ETH_MIB_RX_SYM                          52
  84 #define ETH_MIB_RX_PAUSE                        53
  85 #define ETH_MIB_RX_CNTRL                        54
  86 
  87 
  88 /*
  89  * SW MIB Counters register definitions
  90 */
  91 #define ETHSW_MIB_TX_ALL_OCT                    0
  92 #define ETHSW_MIB_TX_DROP_PKTS                  2
  93 #define ETHSW_MIB_TX_QOS_PKTS                   3
  94 #define ETHSW_MIB_TX_BRDCAST                    4
  95 #define ETHSW_MIB_TX_MULT                       5
  96 #define ETHSW_MIB_TX_UNI                        6
  97 #define ETHSW_MIB_TX_COL                        7
  98 #define ETHSW_MIB_TX_1_COL                      8
  99 #define ETHSW_MIB_TX_M_COL                      9
 100 #define ETHSW_MIB_TX_DEF                        10
 101 #define ETHSW_MIB_TX_LATE                       11
 102 #define ETHSW_MIB_TX_EX_COL                     12
 103 #define ETHSW_MIB_TX_PAUSE                      14
 104 #define ETHSW_MIB_TX_QOS_OCT                    15
 105 
 106 #define ETHSW_MIB_RX_ALL_OCT                    17
 107 #define ETHSW_MIB_RX_UND                        19
 108 #define ETHSW_MIB_RX_PAUSE                      20
 109 #define ETHSW_MIB_RX_64                         21
 110 #define ETHSW_MIB_RX_65_127                     22
 111 #define ETHSW_MIB_RX_128_255                    23
 112 #define ETHSW_MIB_RX_256_511                    24
 113 #define ETHSW_MIB_RX_512_1023                   25
 114 #define ETHSW_MIB_RX_1024_1522                  26
 115 #define ETHSW_MIB_RX_OVR                        27
 116 #define ETHSW_MIB_RX_JAB                        28
 117 #define ETHSW_MIB_RX_ALIGN                      29
 118 #define ETHSW_MIB_RX_CRC                        30
 119 #define ETHSW_MIB_RX_GD_OCT                     31
 120 #define ETHSW_MIB_RX_DROP                       33
 121 #define ETHSW_MIB_RX_UNI                        34
 122 #define ETHSW_MIB_RX_MULT                       35
 123 #define ETHSW_MIB_RX_BRDCAST                    36
 124 #define ETHSW_MIB_RX_SA_CHANGE                  37
 125 #define ETHSW_MIB_RX_FRAG                       38
 126 #define ETHSW_MIB_RX_OVR_DISC                   39
 127 #define ETHSW_MIB_RX_SYM                        40
 128 #define ETHSW_MIB_RX_QOS_PKTS                   41
 129 #define ETHSW_MIB_RX_QOS_OCT                    42
 130 #define ETHSW_MIB_RX_1523_2047                  44
 131 #define ETHSW_MIB_RX_2048_4095                  45
 132 #define ETHSW_MIB_RX_4096_8191                  46
 133 #define ETHSW_MIB_RX_8192_9728                  47
 134 
 135 
 136 struct bcm_enet_mib_counters {
 137         u64 tx_gd_octets;
 138         u32 tx_gd_pkts;
 139         u32 tx_all_octets;
 140         u32 tx_all_pkts;
 141         u32 tx_unicast;
 142         u32 tx_brdcast;
 143         u32 tx_mult;
 144         u32 tx_64;
 145         u32 tx_65_127;
 146         u32 tx_128_255;
 147         u32 tx_256_511;
 148         u32 tx_512_1023;
 149         u32 tx_1024_max;
 150         u32 tx_1523_2047;
 151         u32 tx_2048_4095;
 152         u32 tx_4096_8191;
 153         u32 tx_8192_9728;
 154         u32 tx_jab;
 155         u32 tx_drop;
 156         u32 tx_ovr;
 157         u32 tx_frag;
 158         u32 tx_underrun;
 159         u32 tx_col;
 160         u32 tx_1_col;
 161         u32 tx_m_col;
 162         u32 tx_ex_col;
 163         u32 tx_late;
 164         u32 tx_def;
 165         u32 tx_crs;
 166         u32 tx_pause;
 167         u64 rx_gd_octets;
 168         u32 rx_gd_pkts;
 169         u32 rx_all_octets;
 170         u32 rx_all_pkts;
 171         u32 rx_brdcast;
 172         u32 rx_unicast;
 173         u32 rx_mult;
 174         u32 rx_64;
 175         u32 rx_65_127;
 176         u32 rx_128_255;
 177         u32 rx_256_511;
 178         u32 rx_512_1023;
 179         u32 rx_1024_max;
 180         u32 rx_jab;
 181         u32 rx_ovr;
 182         u32 rx_frag;
 183         u32 rx_drop;
 184         u32 rx_crc_align;
 185         u32 rx_und;
 186         u32 rx_crc;
 187         u32 rx_align;
 188         u32 rx_sym;
 189         u32 rx_pause;
 190         u32 rx_cntrl;
 191 };
 192 
 193 
 194 struct bcm_enet_priv {
 195 
 196         /* base remapped address of device */
 197         void __iomem *base;
 198 
 199         /* mac irq, rx_dma irq, tx_dma irq */
 200         int irq;
 201         int irq_rx;
 202         int irq_tx;
 203 
 204         /* hw view of rx & tx dma ring */
 205         dma_addr_t rx_desc_dma;
 206         dma_addr_t tx_desc_dma;
 207 
 208         /* allocated size (in bytes) for rx & tx dma ring */
 209         unsigned int rx_desc_alloc_size;
 210         unsigned int tx_desc_alloc_size;
 211 
 212 
 213         struct napi_struct napi;
 214 
 215         /* dma channel id for rx */
 216         int rx_chan;
 217 
 218         /* number of dma desc in rx ring */
 219         int rx_ring_size;
 220 
 221         /* cpu view of rx dma ring */
 222         struct bcm_enet_desc *rx_desc_cpu;
 223 
 224         /* current number of armed descriptor given to hardware for rx */
 225         int rx_desc_count;
 226 
 227         /* next rx descriptor to fetch from hardware */
 228         int rx_curr_desc;
 229 
 230         /* next dirty rx descriptor to refill */
 231         int rx_dirty_desc;
 232 
 233         /* size of allocated rx skbs */
 234         unsigned int rx_skb_size;
 235 
 236         /* list of skb given to hw for rx */
 237         struct sk_buff **rx_skb;
 238 
 239         /* used when rx skb allocation failed, so we defer rx queue
 240          * refill */
 241         struct timer_list rx_timeout;
 242 
 243         /* lock rx_timeout against rx normal operation */
 244         spinlock_t rx_lock;
 245 
 246 
 247         /* dma channel id for tx */
 248         int tx_chan;
 249 
 250         /* number of dma desc in tx ring */
 251         int tx_ring_size;
 252 
 253         /* maximum dma burst size */
 254         int dma_maxburst;
 255 
 256         /* cpu view of rx dma ring */
 257         struct bcm_enet_desc *tx_desc_cpu;
 258 
 259         /* number of available descriptor for tx */
 260         int tx_desc_count;
 261 
 262         /* next tx descriptor avaiable */
 263         int tx_curr_desc;
 264 
 265         /* next dirty tx descriptor to reclaim */
 266         int tx_dirty_desc;
 267 
 268         /* list of skb given to hw for tx */
 269         struct sk_buff **tx_skb;
 270 
 271         /* lock used by tx reclaim and xmit */
 272         spinlock_t tx_lock;
 273 
 274 
 275         /* set if internal phy is ignored and external mii interface
 276          * is selected */
 277         int use_external_mii;
 278 
 279         /* set if a phy is connected, phy address must be known,
 280          * probing is not possible */
 281         int has_phy;
 282         int phy_id;
 283 
 284         /* set if connected phy has an associated irq */
 285         int has_phy_interrupt;
 286         int phy_interrupt;
 287 
 288         /* used when a phy is connected (phylib used) */
 289         struct mii_bus *mii_bus;
 290         int old_link;
 291         int old_duplex;
 292         int old_pause;
 293 
 294         /* used when no phy is connected */
 295         int force_speed_100;
 296         int force_duplex_full;
 297 
 298         /* pause parameters */
 299         int pause_auto;
 300         int pause_rx;
 301         int pause_tx;
 302 
 303         /* stats */
 304         struct bcm_enet_mib_counters mib;
 305 
 306         /* after mib interrupt, mib registers update is done in this
 307          * work queue */
 308         struct work_struct mib_update_task;
 309 
 310         /* lock mib update between userspace request and workqueue */
 311         struct mutex mib_update_lock;
 312 
 313         /* mac clock */
 314         struct clk *mac_clk;
 315 
 316         /* phy clock if internal phy is used */
 317         struct clk *phy_clk;
 318 
 319         /* network device reference */
 320         struct net_device *net_dev;
 321 
 322         /* platform device reference */
 323         struct platform_device *pdev;
 324 
 325         /* maximum hardware transmit/receive size */
 326         unsigned int hw_mtu;
 327 
 328         bool enet_is_sw;
 329 
 330         /* port mapping for switch devices */
 331         int num_ports;
 332         struct bcm63xx_enetsw_port used_ports[ENETSW_MAX_PORT];
 333         int sw_port_link[ENETSW_MAX_PORT];
 334 
 335         /* used to poll switch port state */
 336         struct timer_list swphy_poll;
 337         spinlock_t enetsw_mdio_lock;
 338 
 339         /* dma channel enable mask */
 340         u32 dma_chan_en_mask;
 341 
 342         /* dma channel interrupt mask */
 343         u32 dma_chan_int_mask;
 344 
 345         /* DMA engine has internal SRAM */
 346         bool dma_has_sram;
 347 
 348         /* dma channel width */
 349         unsigned int dma_chan_width;
 350 
 351         /* dma descriptor shift value */
 352         unsigned int dma_desc_shift;
 353 };
 354 
 355 
 356 #endif /* ! BCM63XX_ENET_H_ */