kernel/drivers/net/ethernet/brocade/bna/bna_hw_defs.h

   1 /*
   2  * Linux network driver for QLogic BR-series Converged Network Adapter.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License (GPL) Version 2 as
   6  * published by the Free Software Foundation
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  */
  13 /*
  14  * Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
  15  * Copyright (c) 2014-2015 QLogic Corporation
  16  * All rights reserved
  17  * www.qlogic.com
  18  */
  19
  20 /* File for interrupt macros and functions */
  21
  22 #ifndef __BNA_HW_DEFS_H__
  23 #define __BNA_HW_DEFS_H__
  24
  25 #include "bfi_reg.h"
  26
  27 /* SW imposed limits */
  28
  29 #define BFI_ENET_DEF_TXQ                1
  30 #define BFI_ENET_DEF_RXP                1
  31 #define BFI_ENET_DEF_UCAM               1
  32 #define BFI_ENET_DEF_RITSZ              1
  33
  34 #define BFI_ENET_MAX_MCAM               256
  35
  36 #define BFI_INVALID_RID                 -1
  37
  38 #define BFI_IBIDX_SIZE                  4
  39
  40 #define BFI_VLAN_WORD_SHIFT             5       /* 32 bits */
  41 #define BFI_VLAN_WORD_MASK              0x1F
  42 #define BFI_VLAN_BLOCK_SHIFT            9       /* 512 bits */
  43 #define BFI_VLAN_BMASK_ALL              0xFF
  44
  45 #define BFI_COALESCING_TIMER_UNIT       5       /* 5us */
  46 #define BFI_MAX_COALESCING_TIMEO        0xFF    /* in 5us units */
  47 #define BFI_MAX_INTERPKT_COUNT          0xFF
  48 #define BFI_MAX_INTERPKT_TIMEO          0xF     /* in 0.5us units */
  49 #define BFI_TX_COALESCING_TIMEO         20      /* 20 * 5 = 100us */
  50 #define BFI_TX_INTERPKT_COUNT           12      /* Pkt Cnt = 12 */
  51 #define BFI_TX_INTERPKT_TIMEO           15      /* 15 * 0.5 = 7.5us */
  52 #define BFI_RX_COALESCING_TIMEO         12      /* 12 * 5 = 60us */
  53 #define BFI_RX_INTERPKT_COUNT           6       /* Pkt Cnt = 6 */
  54 #define BFI_RX_INTERPKT_TIMEO           3       /* 3 * 0.5 = 1.5us */
  55
  56 #define BFI_TXQ_WI_SIZE                 64      /* bytes */
  57 #define BFI_RXQ_WI_SIZE                 8       /* bytes */
  58 #define BFI_CQ_WI_SIZE                  16      /* bytes */
  59 #define BFI_TX_MAX_WRR_QUOTA            0xFFF
  60
  61 #define BFI_TX_MAX_VECTORS_PER_WI       4
  62 #define BFI_TX_MAX_VECTORS_PER_PKT      0xFF
  63 #define BFI_TX_MAX_DATA_PER_VECTOR      0xFFFF
  64 #define BFI_TX_MAX_DATA_PER_PKT         0xFFFFFF
  65
  66 /* Small Q buffer size */
  67 #define BFI_SMALL_RXBUF_SIZE            128
  68
  69 #define BFI_TX_MAX_PRIO                 8
  70 #define BFI_TX_PRIO_MAP_ALL             0xFF
  71
  72 /*
  73  *
  74  * Register definitions and macros
  75  *
  76  */
  77
  78 #define BNA_PCI_REG_CT_ADDRSZ           (0x40000)
  79
  80 #define ct_reg_addr_init(_bna, _pcidev)                                 \
  81 {                                                                       \
  82         struct bna_reg_offset reg_offset[] =                            \
  83         {{HOSTFN0_INT_STATUS, HOSTFN0_INT_MSK},                         \
  84          {HOSTFN1_INT_STATUS, HOSTFN1_INT_MSK},                         \
  85          {HOSTFN2_INT_STATUS, HOSTFN2_INT_MSK},                         \
  86          {HOSTFN3_INT_STATUS, HOSTFN3_INT_MSK} };                       \
  87                                                                         \
  88         (_bna)->regs.fn_int_status = (_pcidev)->pci_bar_kva +           \
  89                                 reg_offset[(_pcidev)->pci_func].fn_int_status;\
  90         (_bna)->regs.fn_int_mask = (_pcidev)->pci_bar_kva +             \
  91                                 reg_offset[(_pcidev)->pci_func].fn_int_mask;\
  92 }
  93
  94 #define ct_bit_defn_init(_bna, _pcidev)                                 \
  95 {                                                                       \
  96         (_bna)->bits.mbox_status_bits = (__HFN_INT_MBOX_LPU0 |          \
  97                                         __HFN_INT_MBOX_LPU1);           \
  98         (_bna)->bits.mbox_mask_bits = (__HFN_INT_MBOX_LPU0 |            \
  99                                         __HFN_INT_MBOX_LPU1);           \
 100         (_bna)->bits.error_status_bits = (__HFN_INT_ERR_MASK);          \
 101         (_bna)->bits.error_mask_bits = (__HFN_INT_ERR_MASK);            \
 102         (_bna)->bits.halt_status_bits = __HFN_INT_LL_HALT;              \
 103         (_bna)->bits.halt_mask_bits = __HFN_INT_LL_HALT;                \
 104 }
 105
 106 #define ct2_reg_addr_init(_bna, _pcidev)                                \
 107 {                                                                       \
 108         (_bna)->regs.fn_int_status = (_pcidev)->pci_bar_kva +           \
 109                                 CT2_HOSTFN_INT_STATUS;                  \
 110         (_bna)->regs.fn_int_mask = (_pcidev)->pci_bar_kva +             \
 111                                 CT2_HOSTFN_INTR_MASK;                   \
 112 }
 113
 114 #define ct2_bit_defn_init(_bna, _pcidev)                                \
 115 {                                                                       \
 116         (_bna)->bits.mbox_status_bits = (__HFN_INT_MBOX_LPU0_CT2 |      \
 117                                         __HFN_INT_MBOX_LPU1_CT2);       \
 118         (_bna)->bits.mbox_mask_bits = (__HFN_INT_MBOX_LPU0_CT2 |        \
 119                                         __HFN_INT_MBOX_LPU1_CT2);       \
 120         (_bna)->bits.error_status_bits = (__HFN_INT_ERR_MASK_CT2);      \
 121         (_bna)->bits.error_mask_bits = (__HFN_INT_ERR_MASK_CT2);        \
 122         (_bna)->bits.halt_status_bits = __HFN_INT_CPQ_HALT_CT2;         \
 123         (_bna)->bits.halt_mask_bits = __HFN_INT_CPQ_HALT_CT2;           \
 124 }
 125
 126 #define bna_reg_addr_init(_bna, _pcidev)                                \
 127 {                                                                       \
 128         switch ((_pcidev)->device_id) {                                 \
 129         case PCI_DEVICE_ID_BROCADE_CT:                                  \
 130                 ct_reg_addr_init((_bna), (_pcidev));                    \
 131                 ct_bit_defn_init((_bna), (_pcidev));                    \
 132                 break;                                                  \
 133         case BFA_PCI_DEVICE_ID_CT2:                                     \
 134                 ct2_reg_addr_init((_bna), (_pcidev));                   \
 135                 ct2_bit_defn_init((_bna), (_pcidev));                   \
 136                 break;                                                  \
 137         }                                                               \
 138 }
 139
 140 #define bna_port_id_get(_bna) ((_bna)->ioceth.ioc.port_id)
 141
 142 /*  Interrupt related bits, flags and macros  */
 143
 144 #define IB_STATUS_BITS          0x0000ffff
 145
 146 #define BNA_IS_MBOX_INTR(_bna, _intr_status)                            \
 147         ((_intr_status) & (_bna)->bits.mbox_status_bits)
 148
 149 #define BNA_IS_HALT_INTR(_bna, _intr_status)                            \
 150         ((_intr_status) & (_bna)->bits.halt_status_bits)
 151
 152 #define BNA_IS_ERR_INTR(_bna, _intr_status)     \
 153         ((_intr_status) & (_bna)->bits.error_status_bits)
 154
 155 #define BNA_IS_MBOX_ERR_INTR(_bna, _intr_status)        \
 156         (BNA_IS_MBOX_INTR(_bna, _intr_status) |         \
 157         BNA_IS_ERR_INTR(_bna, _intr_status))
 158
 159 #define BNA_IS_INTX_DATA_INTR(_intr_status)             \
 160                 ((_intr_status) & IB_STATUS_BITS)
 161
 162 #define bna_halt_clear(_bna)                                            \
 163 do {                                                                    \
 164         u32 init_halt;                                          \
 165         init_halt = readl((_bna)->ioceth.ioc.ioc_regs.ll_halt); \
 166         init_halt &= ~__FW_INIT_HALT_P;                                 \
 167         writel(init_halt, (_bna)->ioceth.ioc.ioc_regs.ll_halt); \
 168         init_halt = readl((_bna)->ioceth.ioc.ioc_regs.ll_halt); \
 169 } while (0)
 170
 171 #define bna_intx_disable(_bna, _cur_mask)                               \
 172 {                                                                       \
 173         (_cur_mask) = readl((_bna)->regs.fn_int_mask);          \
 174         writel(0xffffffff, (_bna)->regs.fn_int_mask);           \
 175 }
 176
 177 #define bna_intx_enable(bna, new_mask)                                  \
 178         writel((new_mask), (bna)->regs.fn_int_mask)
 179 #define bna_mbox_intr_disable(bna)                                      \
 180 do {                                                                    \
 181         u32 mask;                                                       \
 182         mask = readl((bna)->regs.fn_int_mask);                          \
 183         writel((mask | (bna)->bits.mbox_mask_bits |                     \
 184                 (bna)->bits.error_mask_bits), (bna)->regs.fn_int_mask); \
 185         mask = readl((bna)->regs.fn_int_mask);                          \
 186 } while (0)
 187
 188 #define bna_mbox_intr_enable(bna)                                       \
 189 do {                                                                    \
 190         u32 mask;                                                       \
 191         mask = readl((bna)->regs.fn_int_mask);                          \
 192         writel((mask & ~((bna)->bits.mbox_mask_bits |                   \
 193                 (bna)->bits.error_mask_bits)), (bna)->regs.fn_int_mask);\
 194         mask = readl((bna)->regs.fn_int_mask);                          \
 195 } while (0)
 196
 197 #define bna_intr_status_get(_bna, _status)                              \
 198 {                                                                       \
 199         (_status) = readl((_bna)->regs.fn_int_status);                  \
 200         if (_status) {                                                  \
 201                 writel(((_status) & ~(_bna)->bits.mbox_status_bits),    \
 202                         (_bna)->regs.fn_int_status);                    \
 203         }                                                               \
 204 }
 205
 206 /*
 207  * MAX ACK EVENTS : No. of acks that can be accumulated in driver,
 208  * before acking to h/w. The no. of bits is 16 in the doorbell register,
 209  * however we keep this limited to 15 bits.
 210  * This is because around the edge of 64K boundary (16 bits), one
 211  * single poll can make the accumulated ACK counter cross the 64K boundary,
 212  * causing problems, when we try to ack with a value greater than 64K.
 213  * 15 bits (32K) should  be large enough to accumulate, anyways, and the max.
 214  * acked events to h/w can be (32K + max poll weight) (currently 64).
 215  */
 216 #define BNA_IB_MAX_ACK_EVENTS           (1 << 15)
 217
 218 /* These macros build the data portion of the TxQ/RxQ doorbell */
 219 #define BNA_DOORBELL_Q_PRD_IDX(_pi)     (0x80000000 | (_pi))
 220 #define BNA_DOORBELL_Q_STOP             (0x40000000)
 221
 222 /* These macros build the data portion of the IB doorbell */
 223 #define BNA_DOORBELL_IB_INT_ACK(_timeout, _events)                      \
 224         (0x80000000 | ((_timeout) << 16) | (_events))
 225 #define BNA_DOORBELL_IB_INT_DISABLE     (0x40000000)
 226
 227 /* Set the coalescing timer for the given ib */
 228 #define bna_ib_coalescing_timer_set(_i_dbell, _cls_timer)               \
 229         ((_i_dbell)->doorbell_ack = BNA_DOORBELL_IB_INT_ACK((_cls_timer), 0));
 230
 231 /* Acks 'events' # of events for a given ib while disabling interrupts */
 232 #define bna_ib_ack_disable_irq(_i_dbell, _events)                       \
 233         (writel(BNA_DOORBELL_IB_INT_ACK(0, (_events)), \
 234                 (_i_dbell)->doorbell_addr));
 235
 236 /* Acks 'events' # of events for a given ib */
 237 #define bna_ib_ack(_i_dbell, _events)                                   \
 238         (writel(((_i_dbell)->doorbell_ack | (_events)), \
 239                 (_i_dbell)->doorbell_addr));
 240
 241 #define bna_ib_start(_bna, _ib, _is_regular)                            \
 242 {                                                                       \
 243         u32 intx_mask;                                          \
 244         struct bna_ib *ib = _ib;                                        \
 245         if ((ib->intr_type == BNA_INTR_T_INTX)) {                       \
 246                 bna_intx_disable((_bna), intx_mask);                    \
 247                 intx_mask &= ~(ib->intr_vector);                        \
 248                 bna_intx_enable((_bna), intx_mask);                     \
 249         }                                                               \
 250         bna_ib_coalescing_timer_set(&ib->door_bell,                     \
 251                         ib->coalescing_timeo);                          \
 252         if (_is_regular)                                                \
 253                 bna_ib_ack(&ib->door_bell, 0);                          \
 254 }
 255
 256 #define bna_ib_stop(_bna, _ib)                                          \
 257 {                                                                       \
 258         u32 intx_mask;                                          \
 259         struct bna_ib *ib = _ib;                                        \
 260         writel(BNA_DOORBELL_IB_INT_DISABLE,                             \
 261                 ib->door_bell.doorbell_addr);                           \
 262         if (ib->intr_type == BNA_INTR_T_INTX) {                         \
 263                 bna_intx_disable((_bna), intx_mask);                    \
 264                 intx_mask |= ib->intr_vector;                           \
 265                 bna_intx_enable((_bna), intx_mask);                     \
 266         }                                                               \
 267 }
 268
 269 #define bna_txq_prod_indx_doorbell(_tcb)                                \
 270         (writel(BNA_DOORBELL_Q_PRD_IDX((_tcb)->producer_index), \
 271                 (_tcb)->q_dbell));
 272
 273 #define bna_rxq_prod_indx_doorbell(_rcb)                                \
 274         (writel(BNA_DOORBELL_Q_PRD_IDX((_rcb)->producer_index), \
 275                 (_rcb)->q_dbell));
 276
 277 /* TxQ, RxQ, CQ related bits, offsets, macros */
 278
 279 /* TxQ Entry Opcodes */
 280 #define BNA_TXQ_WI_SEND                 (0x402) /* Single Frame Transmission */
 281 #define BNA_TXQ_WI_SEND_LSO             (0x403) /* Multi-Frame Transmission */
 282 #define BNA_TXQ_WI_EXTENSION            (0x104) /* Extension WI */
 283
 284 /* TxQ Entry Control Flags */
 285 #define BNA_TXQ_WI_CF_FCOE_CRC          (1 << 8)
 286 #define BNA_TXQ_WI_CF_IPID_MODE         (1 << 5)
 287 #define BNA_TXQ_WI_CF_INS_PRIO          (1 << 4)
 288 #define BNA_TXQ_WI_CF_INS_VLAN          (1 << 3)
 289 #define BNA_TXQ_WI_CF_UDP_CKSUM         (1 << 2)
 290 #define BNA_TXQ_WI_CF_TCP_CKSUM         (1 << 1)
 291 #define BNA_TXQ_WI_CF_IP_CKSUM          (1 << 0)
 292
 293 #define BNA_TXQ_WI_L4_HDR_N_OFFSET(_hdr_size, _offset) \
 294                 (((_hdr_size) << 10) | ((_offset) & 0x3FF))
 295
 296 /*
 297  * Completion Q defines
 298  */
 299 /* CQ Entry Flags */
 300 #define BNA_CQ_EF_MAC_ERROR     (1 <<  0)
 301 #define BNA_CQ_EF_FCS_ERROR     (1 <<  1)
 302 #define BNA_CQ_EF_TOO_LONG      (1 <<  2)
 303 #define BNA_CQ_EF_FC_CRC_OK     (1 <<  3)
 304
 305 #define BNA_CQ_EF_RSVD1         (1 <<  4)
 306 #define BNA_CQ_EF_L4_CKSUM_OK   (1 <<  5)
 307 #define BNA_CQ_EF_L3_CKSUM_OK   (1 <<  6)
 308 #define BNA_CQ_EF_HDS_HEADER    (1 <<  7)
 309
 310 #define BNA_CQ_EF_UDP           (1 <<  8)
 311 #define BNA_CQ_EF_TCP           (1 <<  9)
 312 #define BNA_CQ_EF_IP_OPTIONS    (1 << 10)
 313 #define BNA_CQ_EF_IPV6          (1 << 11)
 314
 315 #define BNA_CQ_EF_IPV4          (1 << 12)
 316 #define BNA_CQ_EF_VLAN          (1 << 13)
 317 #define BNA_CQ_EF_RSS           (1 << 14)
 318 #define BNA_CQ_EF_RSVD2         (1 << 15)
 319
 320 #define BNA_CQ_EF_MCAST_MATCH   (1 << 16)
 321 #define BNA_CQ_EF_MCAST         (1 << 17)
 322 #define BNA_CQ_EF_BCAST         (1 << 18)
 323 #define BNA_CQ_EF_REMOTE        (1 << 19)
 324
 325 #define BNA_CQ_EF_LOCAL         (1 << 20)
 326 /* CAT2 ASIC does not use bit 21 as per the SPEC.
 327  * Bit 31 is set in every end of frame completion
 328  */
 329 #define BNA_CQ_EF_EOP           (1 << 31)
 330
 331 /* Data structures */
 332
 333 struct bna_reg_offset {
 334         u32 fn_int_status;
 335         u32 fn_int_mask;
 336 };
 337
 338 struct bna_bit_defn {
 339         u32 mbox_status_bits;
 340         u32 mbox_mask_bits;
 341         u32 error_status_bits;
 342         u32 error_mask_bits;
 343         u32 halt_status_bits;
 344         u32 halt_mask_bits;
 345 };
 346
 347 struct bna_reg {
 348         void __iomem *fn_int_status;
 349         void __iomem *fn_int_mask;
 350 };
 351
 352 /* TxQ Vector (a.k.a. Tx-Buffer Descriptor) */
 353 struct bna_dma_addr {
 354         u32             msb;
 355         u32             lsb;
 356 };
 357
 358 struct bna_txq_wi_vector {
 359         u16             reserved;
 360         u16             length;         /* Only 14 LSB are valid */
 361         struct bna_dma_addr host_addr; /* Tx-Buf DMA addr */
 362 };
 363
 364 /*  TxQ Entry Structure
 365  *
 366  *  BEWARE:  Load values into this structure with correct endianness.
 367  */
 368 struct bna_txq_entry {
 369         union {
 370                 struct {
 371                         u8 reserved;
 372                         u8 num_vectors; /* number of vectors present */
 373                         u16 opcode; /* Either */
 374                                                     /* BNA_TXQ_WI_SEND or */
 375                                                     /* BNA_TXQ_WI_SEND_LSO */
 376                         u16 flags; /* OR of all the flags */
 377                         u16 l4_hdr_size_n_offset;
 378                         u16 vlan_tag;
 379                         u16 lso_mss;    /* Only 14 LSB are valid */
 380                         u32 frame_length;       /* Only 24 LSB are valid */
 381                 } wi;
 382
 383                 struct {
 384                         u16 reserved;
 385                         u16 opcode; /* Must be */
 386                                                     /* BNA_TXQ_WI_EXTENSION */
 387                         u32 reserved2[3];       /* Place holder for */
 388                                                 /* removed vector (12 bytes) */
 389                 } wi_ext;
 390         } hdr;
 391         struct bna_txq_wi_vector vector[4];
 392 };
 393
 394 /* RxQ Entry Structure */
 395 struct bna_rxq_entry {          /* Rx-Buffer */
 396         struct bna_dma_addr host_addr; /* Rx-Buffer DMA address */
 397 };
 398
 399 /* CQ Entry Structure */
 400 struct bna_cq_entry {
 401         u32 flags;
 402         u16 vlan_tag;
 403         u16 length;
 404         u32 rss_hash;
 405         u8 valid;
 406         u8 reserved1;
 407         u8 reserved2;
 408         u8 rxq_id;
 409 };
 410
 411 #endif /* __BNA_HW_DEFS_H__ */