drivers/net/ethernet/tehuti/tehuti.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Tehuti Networks(R) Network Driver
   4  * Copyright (C) 2007 Tehuti Networks Ltd. All rights reserved
   5  */
   6
   7 #ifndef _TEHUTI_H
   8 #define _TEHUTI_H
   9
  10 #include <linux/module.h>
  11 #include <linux/kernel.h>
  12 #include <linux/netdevice.h>
  13 #include <linux/etherdevice.h>
  14 #include <linux/pci.h>
  15 #include <linux/delay.h>
  16 #include <linux/ethtool.h>
  17 #include <linux/mii.h>
  18 #include <linux/crc32.h>
  19 #include <linux/uaccess.h>
  20 #include <linux/in.h>
  21 #include <linux/ip.h>
  22 #include <linux/tcp.h>
  23 #include <linux/sched.h>
  24 #include <linux/tty.h>
  25 #include <linux/if_vlan.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/vmalloc.h>
  28 #include <linux/firmware.h>
  29 #include <asm/byteorder.h>
  30 #include <linux/dma-mapping.h>
  31 #include <linux/slab.h>
  32
  33 /* Compile Time Switches */
  34 /* start */
  35 #define BDX_TSO
  36 #define BDX_LLTX
  37 #define BDX_DELAY_WPTR
  38 /* #define BDX_MSI */
  39 /* end */
  40
  41 #if !defined CONFIG_PCI_MSI
  42 #   undef BDX_MSI
  43 #endif
  44
  45 #define BDX_DEF_MSG_ENABLE      (NETIF_MSG_DRV          | \
  46                                 NETIF_MSG_PROBE        | \
  47                                 NETIF_MSG_LINK)
  48
  49 /* ioctl ops */
  50 #define BDX_OP_READ  1
  51 #define BDX_OP_WRITE 2
  52
  53 /* RX copy break size */
  54 #define BDX_COPYBREAK    257
  55
  56 #define DRIVER_AUTHOR     "Tehuti Networks(R)"
  57 #define BDX_DRV_DESC      "Tehuti Networks(R) Network Driver"
  58 #define BDX_DRV_NAME      "tehuti"
  59 #define BDX_NIC_NAME      "Tehuti 10 Giga TOE SmartNIC"
  60 #define BDX_NIC2PORT_NAME "Tehuti 2-Port 10 Giga TOE SmartNIC"
  61 #define BDX_DRV_VERSION   "7.29.3"
  62
  63 #ifdef BDX_MSI
  64 #    define BDX_MSI_STRING "msi "
  65 #else
  66 #    define BDX_MSI_STRING ""
  67 #endif
  68
  69 /* netdev tx queue len for Luxor. default value is, btw, 1000
  70  * ifcontig eth1 txqueuelen 3000 - to change it at runtime */
  71 #define BDX_NDEV_TXQ_LEN 3000
  72
  73 /* Max MTU for Jumbo Frame mode, per tehutinetworks.net Features FAQ is 16k */
  74 #define BDX_MAX_MTU     (16 * 1024)
  75
  76 #define FIFO_SIZE  4096
  77 #define FIFO_EXTRA_SPACE            1024
  78
  79 #if BITS_PER_LONG == 64
  80 #    define H32_64(x)  (u32) ((u64)(x) >> 32)
  81 #    define L32_64(x)  (u32) ((u64)(x) & 0xffffffff)
  82 #elif BITS_PER_LONG == 32
  83 #    define H32_64(x)  0
  84 #    define L32_64(x)  ((u32) (x))
  85 #else                           /* BITS_PER_LONG == ?? */
  86 #    error BITS_PER_LONG is undefined. Must be 64 or 32
  87 #endif                          /* BITS_PER_LONG */
  88
  89 #ifdef __BIG_ENDIAN
  90 #   define CPU_CHIP_SWAP32(x) swab32(x)
  91 #   define CPU_CHIP_SWAP16(x) swab16(x)
  92 #else
  93 #   define CPU_CHIP_SWAP32(x) (x)
  94 #   define CPU_CHIP_SWAP16(x) (x)
  95 #endif
  96
  97 #define READ_REG(pp, reg)         readl(pp->pBdxRegs + reg)
  98 #define WRITE_REG(pp, reg, val)   writel(val, pp->pBdxRegs + reg)
  99
 100 #ifndef NET_IP_ALIGN
 101 #   define NET_IP_ALIGN 2
 102 #endif
 103
 104 #ifndef NETDEV_TX_OK
 105 #   define NETDEV_TX_OK 0
 106 #endif
 107
 108 #define LUXOR_MAX_PORT     2
 109 #define BDX_MAX_RX_DONE    150
 110 #define BDX_TXF_DESC_SZ    16
 111 #define BDX_MAX_TX_LEVEL   (priv->txd_fifo0.m.memsz - 16)
 112 #define BDX_MIN_TX_LEVEL   256
 113 #define BDX_NO_UPD_PACKETS 40
 114
 115 struct pci_nic {
 116         int port_num;
 117         void __iomem *regs;
 118         int irq_type;
 119         struct bdx_priv *priv[LUXOR_MAX_PORT];
 120 };
 121
 122 enum { IRQ_INTX, IRQ_MSI, IRQ_MSIX };
 123
 124 #define PCK_TH_MULT   128
 125 #define INT_COAL_MULT 2
 126
 127 #define BITS_MASK(nbits)                        ((1<<nbits)-1)
 128 #define GET_BITS_SHIFT(x, nbits, nshift)        (((x)>>nshift)&BITS_MASK(nbits))
 129 #define BITS_SHIFT_MASK(nbits, nshift)          (BITS_MASK(nbits)<<nshift)
 130 #define BITS_SHIFT_VAL(x, nbits, nshift)        (((x)&BITS_MASK(nbits))<<nshift)
 131 #define BITS_SHIFT_CLEAR(x, nbits, nshift)      \
 132         ((x)&(~BITS_SHIFT_MASK(nbits, nshift)))
 133
 134 #define GET_INT_COAL(x)                         GET_BITS_SHIFT(x, 15, 0)
 135 #define GET_INT_COAL_RC(x)                      GET_BITS_SHIFT(x, 1, 15)
 136 #define GET_RXF_TH(x)                           GET_BITS_SHIFT(x, 4, 16)
 137 #define GET_PCK_TH(x)                           GET_BITS_SHIFT(x, 4, 20)
 138
 139 #define INT_REG_VAL(coal, coal_rc, rxf_th, pck_th)      \
 140         ((coal)|((coal_rc)<<15)|((rxf_th)<<16)|((pck_th)<<20))
 141
 142 struct fifo {
 143         dma_addr_t da;          /* physical address of fifo (used by HW) */
 144         char *va;               /* virtual address of fifo (used by SW) */
 145         u32 rptr, wptr;         /* cached values of RPTR and WPTR registers,
 146                                    they're 32 bits on both 32 and 64 archs */
 147         u16 reg_CFG0, reg_CFG1;
 148         u16 reg_RPTR, reg_WPTR;
 149         u16 memsz;              /* memory size allocated for fifo */
 150         u16 size_mask;
 151         u16 pktsz;              /* skb packet size to allocate */
 152         u16 rcvno;              /* number of buffers that come from this RXF */
 153 };
 154
 155 struct txf_fifo {
 156         struct fifo m;          /* minimal set of variables used by all fifos */
 157 };
 158
 159 struct txd_fifo {
 160         struct fifo m;          /* minimal set of variables used by all fifos */
 161 };
 162
 163 struct rxf_fifo {
 164         struct fifo m;          /* minimal set of variables used by all fifos */
 165 };
 166
 167 struct rxd_fifo {
 168         struct fifo m;          /* minimal set of variables used by all fifos */
 169 };
 170
 171 struct rx_map {
 172         u64 dma;
 173         struct sk_buff *skb;
 174 };
 175
 176 struct rxdb {
 177         int *stack;
 178         struct rx_map *elems;
 179         int nelem;
 180         int top;
 181 };
 182
 183 union bdx_dma_addr {
 184         dma_addr_t dma;
 185         struct sk_buff *skb;
 186 };
 187
 188 /* Entry in the db.
 189  * if len == 0 addr is dma
 190  * if len != 0 addr is skb */
 191 struct tx_map {
 192         union bdx_dma_addr addr;
 193         int len;
 194 };
 195
 196 /* tx database - implemented as circular fifo buffer*/
 197 struct txdb {
 198         struct tx_map *start;   /* points to the first element */
 199         struct tx_map *end;     /* points just AFTER the last element */
 200         struct tx_map *rptr;    /* points to the next element to read */
 201         struct tx_map *wptr;    /* points to the next element to write */
 202         int size;               /* number of elements in the db */
 203 };
 204
 205 /*Internal stats structure*/
 206 struct bdx_stats {
 207         u64 InUCast;                    /* 0x7200 */
 208         u64 InMCast;                    /* 0x7210 */
 209         u64 InBCast;                    /* 0x7220 */
 210         u64 InPkts;                     /* 0x7230 */
 211         u64 InErrors;                   /* 0x7240 */
 212         u64 InDropped;                  /* 0x7250 */
 213         u64 FrameTooLong;               /* 0x7260 */
 214         u64 FrameSequenceErrors;        /* 0x7270 */
 215         u64 InVLAN;                     /* 0x7280 */
 216         u64 InDroppedDFE;               /* 0x7290 */
 217         u64 InDroppedIntFull;           /* 0x72A0 */
 218         u64 InFrameAlignErrors;         /* 0x72B0 */
 219
 220         /* 0x72C0-0x72E0 RSRV */
 221
 222         u64 OutUCast;                   /* 0x72F0 */
 223         u64 OutMCast;                   /* 0x7300 */
 224         u64 OutBCast;                   /* 0x7310 */
 225         u64 OutPkts;                    /* 0x7320 */
 226
 227         /* 0x7330-0x7360 RSRV */
 228
 229         u64 OutVLAN;                    /* 0x7370 */
 230         u64 InUCastOctects;             /* 0x7380 */
 231         u64 OutUCastOctects;            /* 0x7390 */
 232
 233         /* 0x73A0-0x73B0 RSRV */
 234
 235         u64 InBCastOctects;             /* 0x73C0 */
 236         u64 OutBCastOctects;            /* 0x73D0 */
 237         u64 InOctects;                  /* 0x73E0 */
 238         u64 OutOctects;                 /* 0x73F0 */
 239 };
 240
 241 struct bdx_priv {
 242         void __iomem *pBdxRegs;
 243         struct net_device *ndev;
 244
 245         struct napi_struct napi;
 246
 247         /* RX FIFOs: 1 for data (full) descs, and 2 for free descs */
 248         struct rxd_fifo rxd_fifo0;
 249         struct rxf_fifo rxf_fifo0;
 250         struct rxdb *rxdb;      /* rx dbs to store skb pointers */
 251         int napi_stop;
 252
 253         /* Tx FIFOs: 1 for data desc, 1 for empty (acks) desc */
 254         struct txd_fifo txd_fifo0;
 255         struct txf_fifo txf_fifo0;
 256
 257         struct txdb txdb;
 258         int tx_level;
 259 #ifdef BDX_DELAY_WPTR
 260         int tx_update_mark;
 261         int tx_noupd;
 262 #endif
 263         spinlock_t tx_lock;     /* NETIF_F_LLTX mode */
 264
 265         /* rarely used */
 266         u8 port;
 267         u32 msg_enable;
 268         int stats_flag;
 269         struct bdx_stats hw_stats;
 270         struct pci_dev *pdev;
 271
 272         struct pci_nic *nic;
 273
 274         u8 txd_size;
 275         u8 txf_size;
 276         u8 rxd_size;
 277         u8 rxf_size;
 278         u32 rdintcm;
 279         u32 tdintcm;
 280 };
 281
 282 /* RX FREE descriptor - 64bit*/
 283 struct rxf_desc {
 284         u32 info;               /* Buffer Count + Info - described below */
 285         u32 va_lo;              /* VAdr[31:0] */
 286         u32 va_hi;              /* VAdr[63:32] */
 287         u32 pa_lo;              /* PAdr[31:0] */
 288         u32 pa_hi;              /* PAdr[63:32] */
 289         u32 len;                /* Buffer Length */
 290 };
 291
 292 #define GET_RXD_BC(x)                   GET_BITS_SHIFT((x), 5, 0)
 293 #define GET_RXD_RXFQ(x)                 GET_BITS_SHIFT((x), 2, 8)
 294 #define GET_RXD_TO(x)                   GET_BITS_SHIFT((x), 1, 15)
 295 #define GET_RXD_TYPE(x)                 GET_BITS_SHIFT((x), 4, 16)
 296 #define GET_RXD_ERR(x)                  GET_BITS_SHIFT((x), 6, 21)
 297 #define GET_RXD_RXP(x)                  GET_BITS_SHIFT((x), 1, 27)
 298 #define GET_RXD_PKT_ID(x)               GET_BITS_SHIFT((x), 3, 28)
 299 #define GET_RXD_VTAG(x)                 GET_BITS_SHIFT((x), 1, 31)
 300 #define GET_RXD_VLAN_ID(x)              GET_BITS_SHIFT((x), 12, 0)
 301 #define GET_RXD_VLAN_TCI(x)             GET_BITS_SHIFT((x), 16, 0)
 302 #define GET_RXD_CFI(x)                  GET_BITS_SHIFT((x), 1, 12)
 303 #define GET_RXD_PRIO(x)                 GET_BITS_SHIFT((x), 3, 13)
 304
 305 struct rxd_desc {
 306         u32 rxd_val1;
 307         u16 len;
 308         u16 rxd_vlan;
 309         u32 va_lo;
 310         u32 va_hi;
 311 };
 312
 313 /* PBL describes each virtual buffer to be */
 314 /* transmitted from the host.*/
 315 struct pbl {
 316         u32 pa_lo;
 317         u32 pa_hi;
 318         u32 len;
 319 };
 320
 321 /* First word for TXD descriptor. It means: type = 3 for regular Tx packet,
 322  * hw_csum = 7 for ip+udp+tcp hw checksums */
 323 #define TXD_W1_VAL(bc, checksum, vtag, lgsnd, vlan_id)  \
 324         ((bc) | ((checksum)<<5) | ((vtag)<<8) | \
 325         ((lgsnd)<<9) | (0x30000) | ((vlan_id)<<20))
 326
 327 struct txd_desc {
 328         u32 txd_val1;
 329         u16 mss;
 330         u16 length;
 331         u32 va_lo;
 332         u32 va_hi;
 333         struct pbl pbl[0];      /* Fragments */
 334 } __packed;
 335
 336 /* Register region size */
 337 #define BDX_REGS_SIZE     0x1000
 338
 339 /* Registers from 0x0000-0x00fc were remapped to 0x4000-0x40fc */
 340 #define regTXD_CFG1_0   0x4000
 341 #define regRXF_CFG1_0   0x4010
 342 #define regRXD_CFG1_0   0x4020
 343 #define regTXF_CFG1_0   0x4030
 344 #define regTXD_CFG0_0   0x4040
 345 #define regRXF_CFG0_0   0x4050
 346 #define regRXD_CFG0_0   0x4060
 347 #define regTXF_CFG0_0   0x4070
 348 #define regTXD_WPTR_0   0x4080
 349 #define regRXF_WPTR_0   0x4090
 350 #define regRXD_WPTR_0   0x40A0
 351 #define regTXF_WPTR_0   0x40B0
 352 #define regTXD_RPTR_0   0x40C0
 353 #define regRXF_RPTR_0   0x40D0
 354 #define regRXD_RPTR_0   0x40E0
 355 #define regTXF_RPTR_0   0x40F0
 356 #define regTXF_RPTR_3   0x40FC
 357
 358 /* hardware versioning */
 359 #define  FW_VER         0x5010
 360 #define  SROM_VER       0x5020
 361 #define  FPGA_VER       0x5030
 362 #define  FPGA_SEED      0x5040
 363
 364 /* Registers from 0x0100-0x0150 were remapped to 0x5100-0x5150 */
 365 #define regISR regISR0
 366 #define regISR0          0x5100
 367
 368 #define regIMR regIMR0
 369 #define regIMR0          0x5110
 370
 371 #define regRDINTCM0      0x5120
 372 #define regRDINTCM2      0x5128
 373
 374 #define regTDINTCM0      0x5130
 375
 376 #define regISR_MSK0      0x5140
 377
 378 #define regINIT_SEMAPHORE 0x5170
 379 #define regINIT_STATUS    0x5180
 380
 381 #define regMAC_LNK_STAT  0x0200
 382 #define MAC_LINK_STAT    0x4    /* Link state */
 383
 384 #define regGMAC_RXF_A   0x1240
 385
 386 #define regUNC_MAC0_A   0x1250
 387 #define regUNC_MAC1_A   0x1260
 388 #define regUNC_MAC2_A   0x1270
 389
 390 #define regVLAN_0       0x1800
 391
 392 #define regMAX_FRAME_A  0x12C0
 393
 394 #define regRX_MAC_MCST0    0x1A80
 395 #define regRX_MAC_MCST1    0x1A84
 396 #define MAC_MCST_NUM       15
 397 #define regRX_MCST_HASH0   0x1A00
 398 #define MAC_MCST_HASH_NUM  8
 399
 400 #define regVPC                  0x2300
 401 #define regVIC                  0x2320
 402 #define regVGLB                 0x2340
 403
 404 #define regCLKPLL               0x5000
 405
 406 /*for 10G only*/
 407 #define regREVISION        0x6000
 408 #define regSCRATCH         0x6004
 409 #define regCTRLST          0x6008
 410 #define regMAC_ADDR_0      0x600C
 411 #define regMAC_ADDR_1      0x6010
 412 #define regFRM_LENGTH      0x6014
 413 #define regPAUSE_QUANT     0x6018
 414 #define regRX_FIFO_SECTION 0x601C
 415 #define regTX_FIFO_SECTION 0x6020
 416 #define regRX_FULLNESS     0x6024
 417 #define regTX_FULLNESS     0x6028
 418 #define regHASHTABLE       0x602C
 419 #define regMDIO_ST         0x6030
 420 #define regMDIO_CTL        0x6034
 421 #define regMDIO_DATA       0x6038
 422 #define regMDIO_ADDR       0x603C
 423
 424 #define regRST_PORT        0x7000
 425 #define regDIS_PORT        0x7010
 426 #define regRST_QU          0x7020
 427 #define regDIS_QU          0x7030
 428
 429 #define regCTRLST_TX_ENA   0x0001
 430 #define regCTRLST_RX_ENA   0x0002
 431 #define regCTRLST_PRM_ENA  0x0010
 432 #define regCTRLST_PAD_ENA  0x0020
 433
 434 #define regCTRLST_BASE     (regCTRLST_PAD_ENA|regCTRLST_PRM_ENA)
 435
 436 #define regRX_FLT   0x1400
 437
 438 /* TXD TXF RXF RXD  CONFIG 0x0000 --- 0x007c*/
 439 #define  TX_RX_CFG1_BASE          0xffffffff    /*0-31 */
 440 #define  TX_RX_CFG0_BASE          0xfffff000    /*31:12 */
 441 #define  TX_RX_CFG0_RSVD          0x0ffc        /*11:2 */
 442 #define  TX_RX_CFG0_SIZE          0x0003        /*1:0 */
 443
 444 /*  TXD TXF RXF RXD  WRITE 0x0080 --- 0x00BC */
 445 #define  TXF_WPTR_WR_PTR        0x7ff8  /*14:3 */
 446
 447 /*  TXD TXF RXF RXD  READ  0x00CO --- 0x00FC */
 448 #define  TXF_RPTR_RD_PTR        0x7ff8  /*14:3 */
 449
 450 #define TXF_WPTR_MASK 0x7ff0    /* last 4 bits are dropped
 451                                  * size is rounded to 16 */
 452
 453 /*  regISR 0x0100 */
 454 /*  regIMR 0x0110 */
 455 #define  IMR_INPROG   0x80000000        /*31 */
 456 #define  IR_LNKCHG1   0x10000000        /*28 */
 457 #define  IR_LNKCHG0   0x08000000        /*27 */
 458 #define  IR_GPIO      0x04000000        /*26 */
 459 #define  IR_RFRSH     0x02000000        /*25 */
 460 #define  IR_RSVD      0x01000000        /*24 */
 461 #define  IR_SWI       0x00800000        /*23 */
 462 #define  IR_RX_FREE_3 0x00400000        /*22 */
 463 #define  IR_RX_FREE_2 0x00200000        /*21 */
 464 #define  IR_RX_FREE_1 0x00100000        /*20 */
 465 #define  IR_RX_FREE_0 0x00080000        /*19 */
 466 #define  IR_TX_FREE_3 0x00040000        /*18 */
 467 #define  IR_TX_FREE_2 0x00020000        /*17 */
 468 #define  IR_TX_FREE_1 0x00010000        /*16 */
 469 #define  IR_TX_FREE_0 0x00008000        /*15 */
 470 #define  IR_RX_DESC_3 0x00004000        /*14 */
 471 #define  IR_RX_DESC_2 0x00002000        /*13 */
 472 #define  IR_RX_DESC_1 0x00001000        /*12 */
 473 #define  IR_RX_DESC_0 0x00000800        /*11 */
 474 #define  IR_PSE       0x00000400        /*10 */
 475 #define  IR_TMR3      0x00000200        /*9 */
 476 #define  IR_TMR2      0x00000100        /*8 */
 477 #define  IR_TMR1      0x00000080        /*7 */
 478 #define  IR_TMR0      0x00000040        /*6 */
 479 #define  IR_VNT       0x00000020        /*5 */
 480 #define  IR_RxFL      0x00000010        /*4 */
 481 #define  IR_SDPERR    0x00000008        /*3 */
 482 #define  IR_TR        0x00000004        /*2 */
 483 #define  IR_PCIE_LINK 0x00000002        /*1 */
 484 #define  IR_PCIE_TOUT 0x00000001        /*0 */
 485
 486 #define  IR_EXTRA (IR_RX_FREE_0 | IR_LNKCHG0 | IR_PSE | \
 487     IR_TMR0 | IR_PCIE_LINK | IR_PCIE_TOUT)
 488 #define  IR_RUN (IR_EXTRA | IR_RX_DESC_0 | IR_TX_FREE_0)
 489 #define  IR_ALL 0xfdfffff7
 490
 491 #define  IR_LNKCHG0_ofst        27
 492
 493 #define  GMAC_RX_FILTER_OSEN  0x1000    /* shared OS enable */
 494 #define  GMAC_RX_FILTER_TXFC  0x0400    /* Tx flow control */
 495 #define  GMAC_RX_FILTER_RSV0  0x0200    /* reserved */
 496 #define  GMAC_RX_FILTER_FDA   0x0100    /* filter out direct address */
 497 #define  GMAC_RX_FILTER_AOF   0x0080    /* accept over run */
 498 #define  GMAC_RX_FILTER_ACF   0x0040    /* accept control frames */
 499 #define  GMAC_RX_FILTER_ARUNT 0x0020    /* accept under run */
 500 #define  GMAC_RX_FILTER_ACRC  0x0010    /* accept crc error */
 501 #define  GMAC_RX_FILTER_AM    0x0008    /* accept multicast */
 502 #define  GMAC_RX_FILTER_AB    0x0004    /* accept broadcast */
 503 #define  GMAC_RX_FILTER_PRM   0x0001    /* [0:1] promiscuous mode */
 504
 505 #define  MAX_FRAME_AB_VAL       0x3fff  /* 13:0 */
 506
 507 #define  CLKPLL_PLLLKD          0x0200  /*9 */
 508 #define  CLKPLL_RSTEND          0x0100  /*8 */
 509 #define  CLKPLL_SFTRST          0x0001  /*0 */
 510
 511 #define  CLKPLL_LKD             (CLKPLL_PLLLKD|CLKPLL_RSTEND)
 512
 513 /*
 514  * PCI-E Device Control Register (Offset 0x88)
 515  * Source: Luxor Data Sheet, 7.1.3.3.3
 516  */
 517 #define PCI_DEV_CTRL_REG 0x88
 518 #define GET_DEV_CTRL_MAXPL(x)           GET_BITS_SHIFT(x, 3, 5)
 519 #define GET_DEV_CTRL_MRRS(x)            GET_BITS_SHIFT(x, 3, 12)
 520
 521 /*
 522  * PCI-E Link Status Register (Offset 0x92)
 523  * Source: Luxor Data Sheet, 7.1.3.3.7
 524  */
 525 #define PCI_LINK_STATUS_REG 0x92
 526 #define GET_LINK_STATUS_LANES(x)                GET_BITS_SHIFT(x, 6, 4)
 527
 528 /* Debugging Macros */
 529
 530 #define DBG2(fmt, args...)                                      \
 531         pr_err("%s:%-5d: " fmt, __func__, __LINE__, ## args)
 532
 533 #define BDX_ASSERT(x) BUG_ON(x)
 534
 535 #ifdef DEBUG
 536
 537 #define ENTER                                           \
 538 do {                                                    \
 539         pr_err("%s:%-5d: ENTER\n", __func__, __LINE__); \
 540 } while (0)
 541
 542 #define RET(args...)                                     \
 543 do {                                                     \
 544         pr_err("%s:%-5d: RETURN\n", __func__, __LINE__); \
 545         return args;                                     \
 546 } while (0)
 547
 548 #define DBG(fmt, args...)                                       \
 549         pr_err("%s:%-5d: " fmt, __func__, __LINE__, ## args)
 550 #else
 551 #define ENTER do {  } while (0)
 552 #define RET(args...)   return args
 553 #define DBG(fmt, args...)                       \
 554 do {                                            \
 555         if (0)                                  \
 556                 pr_err(fmt, ##args);            \
 557 } while (0)
 558 #endif
 559
 560 #endif /* _BDX__H */