drivers/infiniband/hw/cxgb4/t4.h

   1 /*
   2  * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *      - Redistributions in binary form must reproduce the above
  18  *        copyright notice, this list of conditions and the following
  19  *        disclaimer in the documentation and/or other materials
  20  *        provided with the distribution.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  26  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  27  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  28  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  29  * SOFTWARE.
  30  */
  31 #ifndef __T4_H__
  32 #define __T4_H__
  33
  34 #include "t4_hw.h"
  35 #include "t4_regs.h"
  36 #include "t4_values.h"
  37 #include "t4_msg.h"
  38 #include "t4fw_ri_api.h"
  39
  40 #define T4_MAX_NUM_PD 65536
  41 #define T4_MAX_MR_SIZE (~0ULL)
  42 #define T4_PAGESIZE_MASK 0xffff000  /* 4KB-128MB */
  43 #define T4_STAG_UNSET 0xffffffff
  44 #define T4_FW_MAJ 0
  45 #define PCIE_MA_SYNC_A 0x30b4
  46
  47 struct t4_status_page {
  48         __be32 rsvd1;   /* flit 0 - hw owns */
  49         __be16 rsvd2;
  50         __be16 qid;
  51         __be16 cidx;
  52         __be16 pidx;
  53         u8 qp_err;      /* flit 1 - sw owns */
  54         u8 db_off;
  55         u8 pad[2];
  56         u16 host_wq_pidx;
  57         u16 host_cidx;
  58         u16 host_pidx;
  59         u16 pad2;
  60         u32 srqidx;
  61 };
  62
  63 #define T4_RQT_ENTRY_SHIFT 6
  64 #define T4_RQT_ENTRY_SIZE  BIT(T4_RQT_ENTRY_SHIFT)
  65 #define T4_EQ_ENTRY_SIZE 64
  66
  67 #define T4_SQ_NUM_SLOTS 5
  68 #define T4_SQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_SQ_NUM_SLOTS)
  69 #define T4_MAX_SEND_SGE ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_send_wr) - \
  70                         sizeof(struct fw_ri_isgl)) / sizeof(struct fw_ri_sge))
  71 #define T4_MAX_SEND_INLINE ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_send_wr) - \
  72                         sizeof(struct fw_ri_immd)))
  73 #define T4_MAX_WRITE_INLINE ((T4_SQ_NUM_BYTES - \
  74                         sizeof(struct fw_ri_rdma_write_wr) - \
  75                         sizeof(struct fw_ri_immd)))
  76 #define T4_MAX_WRITE_SGE ((T4_SQ_NUM_BYTES - \
  77                         sizeof(struct fw_ri_rdma_write_wr) - \
  78                         sizeof(struct fw_ri_isgl)) / sizeof(struct fw_ri_sge))
  79 #define T4_MAX_FR_IMMD ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_fr_nsmr_wr) - \
  80                         sizeof(struct fw_ri_immd)) & ~31UL)
  81 #define T4_MAX_FR_IMMD_DEPTH (T4_MAX_FR_IMMD / sizeof(u64))
  82 #define T4_MAX_FR_DSGL 1024
  83 #define T4_MAX_FR_DSGL_DEPTH (T4_MAX_FR_DSGL / sizeof(u64))
  84
  85 static inline int t4_max_fr_depth(int use_dsgl)
  86 {
  87         return use_dsgl ? T4_MAX_FR_DSGL_DEPTH : T4_MAX_FR_IMMD_DEPTH;
  88 }
  89
  90 #define T4_RQ_NUM_SLOTS 2
  91 #define T4_RQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_RQ_NUM_SLOTS)
  92 #define T4_MAX_RECV_SGE 4
  93
  94 #define T4_WRITE_CMPL_MAX_SGL 4
  95 #define T4_WRITE_CMPL_MAX_CQE 16
  96
  97 union t4_wr {
  98         struct fw_ri_res_wr res;
  99         struct fw_ri_wr ri;
 100         struct fw_ri_rdma_write_wr write;
 101         struct fw_ri_send_wr send;
 102         struct fw_ri_rdma_read_wr read;
 103         struct fw_ri_bind_mw_wr bind;
 104         struct fw_ri_fr_nsmr_wr fr;
 105         struct fw_ri_fr_nsmr_tpte_wr fr_tpte;
 106         struct fw_ri_inv_lstag_wr inv;
 107         struct fw_ri_rdma_write_cmpl_wr write_cmpl;
 108         struct t4_status_page status;
 109         __be64 flits[T4_EQ_ENTRY_SIZE / sizeof(__be64) * T4_SQ_NUM_SLOTS];
 110 };
 111
 112 union t4_recv_wr {
 113         struct fw_ri_recv_wr recv;
 114         struct t4_status_page status;
 115         __be64 flits[T4_EQ_ENTRY_SIZE / sizeof(__be64) * T4_RQ_NUM_SLOTS];
 116 };
 117
 118 static inline void init_wr_hdr(union t4_wr *wqe, u16 wrid,
 119                                enum fw_wr_opcodes opcode, u8 flags, u8 len16)
 120 {
 121         wqe->send.opcode = (u8)opcode;
 122         wqe->send.flags = flags;
 123         wqe->send.wrid = wrid;
 124         wqe->send.r1[0] = 0;
 125         wqe->send.r1[1] = 0;
 126         wqe->send.r1[2] = 0;
 127         wqe->send.len16 = len16;
 128 }
 129
 130 /* CQE/AE status codes */
 131 #define T4_ERR_SUCCESS                     0x0
 132 #define T4_ERR_STAG                        0x1  /* STAG invalid: either the */
 133                                                 /* STAG is offlimt, being 0, */
 134                                                 /* or STAG_key mismatch */
 135 #define T4_ERR_PDID                        0x2  /* PDID mismatch */
 136 #define T4_ERR_QPID                        0x3  /* QPID mismatch */
 137 #define T4_ERR_ACCESS                      0x4  /* Invalid access right */
 138 #define T4_ERR_WRAP                        0x5  /* Wrap error */
 139 #define T4_ERR_BOUND                       0x6  /* base and bounds voilation */
 140 #define T4_ERR_INVALIDATE_SHARED_MR        0x7  /* attempt to invalidate a  */
 141                                                 /* shared memory region */
 142 #define T4_ERR_INVALIDATE_MR_WITH_MW_BOUND 0x8  /* attempt to invalidate a  */
 143                                                 /* shared memory region */
 144 #define T4_ERR_ECC                         0x9  /* ECC error detected */
 145 #define T4_ERR_ECC_PSTAG                   0xA  /* ECC error detected when  */
 146                                                 /* reading PSTAG for a MW  */
 147                                                 /* Invalidate */
 148 #define T4_ERR_PBL_ADDR_BOUND              0xB  /* pbl addr out of bounds:  */
 149                                                 /* software error */
 150 #define T4_ERR_SWFLUSH                     0xC  /* SW FLUSHED */
 151 #define T4_ERR_CRC                         0x10 /* CRC error */
 152 #define T4_ERR_MARKER                      0x11 /* Marker error */
 153 #define T4_ERR_PDU_LEN_ERR                 0x12 /* invalid PDU length */
 154 #define T4_ERR_OUT_OF_RQE                  0x13 /* out of RQE */
 155 #define T4_ERR_DDP_VERSION                 0x14 /* wrong DDP version */
 156 #define T4_ERR_RDMA_VERSION                0x15 /* wrong RDMA version */
 157 #define T4_ERR_OPCODE                      0x16 /* invalid rdma opcode */
 158 #define T4_ERR_DDP_QUEUE_NUM               0x17 /* invalid ddp queue number */
 159 #define T4_ERR_MSN                         0x18 /* MSN error */
 160 #define T4_ERR_TBIT                        0x19 /* tag bit not set correctly */
 161 #define T4_ERR_MO                          0x1A /* MO not 0 for TERMINATE  */
 162                                                 /* or READ_REQ */
 163 #define T4_ERR_MSN_GAP                     0x1B
 164 #define T4_ERR_MSN_RANGE                   0x1C
 165 #define T4_ERR_IRD_OVERFLOW                0x1D
 166 #define T4_ERR_RQE_ADDR_BOUND              0x1E /* RQE addr out of bounds:  */
 167                                                 /* software error */
 168 #define T4_ERR_INTERNAL_ERR                0x1F /* internal error (opcode  */
 169                                                 /* mismatch) */
 170 /*
 171  * CQE defs
 172  */
 173 struct t4_cqe {
 174         __be32 header;
 175         __be32 len;
 176         union {
 177                 struct {
 178                         __be32 stag;
 179                         __be32 msn;
 180                 } rcqe;
 181                 struct {
 182                         __be32 stag;
 183                         u16 nada2;
 184                         u16 cidx;
 185                 } scqe;
 186                 struct {
 187                         __be32 wrid_hi;
 188                         __be32 wrid_low;
 189                 } gen;
 190                 struct {
 191                         __be32 stag;
 192                         __be32 msn;
 193                         __be32 reserved;
 194                         __be32 abs_rqe_idx;
 195                 } srcqe;
 196                 struct {
 197                         __be32 mo;
 198                         __be32 msn;
 199                         /*
 200                          * Use union for immediate data to be consistent with
 201                          * stack's 32 bit data and iWARP spec's 64 bit data.
 202                          */
 203                         union {
 204                                 struct {
 205                                         __be32 imm_data32;
 206                                         u32 reserved;
 207                                 } ib_imm_data;
 208                                 __be64 imm_data64;
 209                         } iw_imm_data;
 210                 } imm_data_rcqe;
 211
 212                 u64 drain_cookie;
 213                 __be64 flits[3];
 214         } u;
 215         __be64 reserved[3];
 216         __be64 bits_type_ts;
 217 };
 218
 219 /* macros for flit 0 of the cqe */
 220
 221 #define CQE_QPID_S        12
 222 #define CQE_QPID_M        0xFFFFF
 223 #define CQE_QPID_G(x)     ((((x) >> CQE_QPID_S)) & CQE_QPID_M)
 224 #define CQE_QPID_V(x)     ((x)<<CQE_QPID_S)
 225
 226 #define CQE_SWCQE_S       11
 227 #define CQE_SWCQE_M       0x1
 228 #define CQE_SWCQE_G(x)    ((((x) >> CQE_SWCQE_S)) & CQE_SWCQE_M)
 229 #define CQE_SWCQE_V(x)    ((x)<<CQE_SWCQE_S)
 230
 231 #define CQE_DRAIN_S       10
 232 #define CQE_DRAIN_M       0x1
 233 #define CQE_DRAIN_G(x)    ((((x) >> CQE_DRAIN_S)) & CQE_DRAIN_M)
 234 #define CQE_DRAIN_V(x)    ((x)<<CQE_DRAIN_S)
 235
 236 #define CQE_STATUS_S      5
 237 #define CQE_STATUS_M      0x1F
 238 #define CQE_STATUS_G(x)   ((((x) >> CQE_STATUS_S)) & CQE_STATUS_M)
 239 #define CQE_STATUS_V(x)   ((x)<<CQE_STATUS_S)
 240
 241 #define CQE_TYPE_S        4
 242 #define CQE_TYPE_M        0x1
 243 #define CQE_TYPE_G(x)     ((((x) >> CQE_TYPE_S)) & CQE_TYPE_M)
 244 #define CQE_TYPE_V(x)     ((x)<<CQE_TYPE_S)
 245
 246 #define CQE_OPCODE_S      0
 247 #define CQE_OPCODE_M      0xF
 248 #define CQE_OPCODE_G(x)   ((((x) >> CQE_OPCODE_S)) & CQE_OPCODE_M)
 249 #define CQE_OPCODE_V(x)   ((x)<<CQE_OPCODE_S)
 250
 251 #define SW_CQE(x)         (CQE_SWCQE_G(be32_to_cpu((x)->header)))
 252 #define DRAIN_CQE(x)      (CQE_DRAIN_G(be32_to_cpu((x)->header)))
 253 #define CQE_QPID(x)       (CQE_QPID_G(be32_to_cpu((x)->header)))
 254 #define CQE_TYPE(x)       (CQE_TYPE_G(be32_to_cpu((x)->header)))
 255 #define SQ_TYPE(x)        (CQE_TYPE((x)))
 256 #define RQ_TYPE(x)        (!CQE_TYPE((x)))
 257 #define CQE_STATUS(x)     (CQE_STATUS_G(be32_to_cpu((x)->header)))
 258 #define CQE_OPCODE(x)     (CQE_OPCODE_G(be32_to_cpu((x)->header)))
 259
 260 #define CQE_SEND_OPCODE(x)( \
 261         (CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_SEND) || \
 262         (CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_SE) || \
 263         (CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_INV) || \
 264         (CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_SE_INV))
 265
 266 #define CQE_LEN(x)        (be32_to_cpu((x)->len))
 267
 268 /* used for RQ completion processing */
 269 #define CQE_WRID_STAG(x)  (be32_to_cpu((x)->u.rcqe.stag))
 270 #define CQE_WRID_MSN(x)   (be32_to_cpu((x)->u.rcqe.msn))
 271 #define CQE_ABS_RQE_IDX(x) (be32_to_cpu((x)->u.srcqe.abs_rqe_idx))
 272 #define CQE_IMM_DATA(x)( \
 273         (x)->u.imm_data_rcqe.iw_imm_data.ib_imm_data.imm_data32)
 274
 275 /* used for SQ completion processing */
 276 #define CQE_WRID_SQ_IDX(x)      ((x)->u.scqe.cidx)
 277 #define CQE_WRID_FR_STAG(x)     (be32_to_cpu((x)->u.scqe.stag))
 278
 279 /* generic accessor macros */
 280 #define CQE_WRID_HI(x)          (be32_to_cpu((x)->u.gen.wrid_hi))
 281 #define CQE_WRID_LOW(x)         (be32_to_cpu((x)->u.gen.wrid_low))
 282 #define CQE_DRAIN_COOKIE(x)     ((x)->u.drain_cookie)
 283
 284 /* macros for flit 3 of the cqe */
 285 #define CQE_GENBIT_S    63
 286 #define CQE_GENBIT_M    0x1
 287 #define CQE_GENBIT_G(x) (((x) >> CQE_GENBIT_S) & CQE_GENBIT_M)
 288 #define CQE_GENBIT_V(x) ((x)<<CQE_GENBIT_S)
 289
 290 #define CQE_OVFBIT_S    62
 291 #define CQE_OVFBIT_M    0x1
 292 #define CQE_OVFBIT_G(x) ((((x) >> CQE_OVFBIT_S)) & CQE_OVFBIT_M)
 293
 294 #define CQE_IQTYPE_S    60
 295 #define CQE_IQTYPE_M    0x3
 296 #define CQE_IQTYPE_G(x) ((((x) >> CQE_IQTYPE_S)) & CQE_IQTYPE_M)
 297
 298 #define CQE_TS_M        0x0fffffffffffffffULL
 299 #define CQE_TS_G(x)     ((x) & CQE_TS_M)
 300
 301 #define CQE_OVFBIT(x)   ((unsigned)CQE_OVFBIT_G(be64_to_cpu((x)->bits_type_ts)))
 302 #define CQE_GENBIT(x)   ((unsigned)CQE_GENBIT_G(be64_to_cpu((x)->bits_type_ts)))
 303 #define CQE_TS(x)       (CQE_TS_G(be64_to_cpu((x)->bits_type_ts)))
 304
 305 struct t4_swsqe {
 306         u64                     wr_id;
 307         struct t4_cqe           cqe;
 308         int                     read_len;
 309         int                     opcode;
 310         int                     complete;
 311         int                     signaled;
 312         u16                     idx;
 313         int                     flushed;
 314         ktime_t                 host_time;
 315         u64                     sge_ts;
 316 };
 317
 318 static inline pgprot_t t4_pgprot_wc(pgprot_t prot)
 319 {
 320 #if defined(__i386__) || defined(__x86_64__) || defined(CONFIG_PPC64)
 321         return pgprot_writecombine(prot);
 322 #else
 323         return pgprot_noncached(prot);
 324 #endif
 325 }
 326
 327 enum {
 328         T4_SQ_ONCHIP = (1<<0),
 329 };
 330
 331 struct t4_sq {
 332         union t4_wr *queue;
 333         dma_addr_t dma_addr;
 334         DEFINE_DMA_UNMAP_ADDR(mapping);
 335         unsigned long phys_addr;
 336         struct t4_swsqe *sw_sq;
 337         struct t4_swsqe *oldest_read;
 338         void __iomem *bar2_va;
 339         u64 bar2_pa;
 340         size_t memsize;
 341         u32 bar2_qid;
 342         u32 qid;
 343         u16 in_use;
 344         u16 size;
 345         u16 cidx;
 346         u16 pidx;
 347         u16 wq_pidx;
 348         u16 wq_pidx_inc;
 349         u16 flags;
 350         short flush_cidx;
 351 };
 352
 353 struct t4_swrqe {
 354         u64 wr_id;
 355         ktime_t host_time;
 356         u64 sge_ts;
 357         int valid;
 358 };
 359
 360 struct t4_rq {
 361         union  t4_recv_wr *queue;
 362         dma_addr_t dma_addr;
 363         DEFINE_DMA_UNMAP_ADDR(mapping);
 364         struct t4_swrqe *sw_rq;
 365         void __iomem *bar2_va;
 366         u64 bar2_pa;
 367         size_t memsize;
 368         u32 bar2_qid;
 369         u32 qid;
 370         u32 msn;
 371         u32 rqt_hwaddr;
 372         u16 rqt_size;
 373         u16 in_use;
 374         u16 size;
 375         u16 cidx;
 376         u16 pidx;
 377         u16 wq_pidx;
 378         u16 wq_pidx_inc;
 379 };
 380
 381 struct t4_wq {
 382         struct t4_sq sq;
 383         struct t4_rq rq;
 384         void __iomem *db;
 385         struct c4iw_rdev *rdev;
 386         int flushed;
 387         u8 *qp_errp;
 388         u32 *srqidxp;
 389 };
 390
 391 struct t4_srq_pending_wr {
 392         u64 wr_id;
 393         union t4_recv_wr wqe;
 394         u8 len16;
 395 };
 396
 397 struct t4_srq {
 398         union t4_recv_wr *queue;
 399         dma_addr_t dma_addr;
 400         DEFINE_DMA_UNMAP_ADDR(mapping);
 401         struct t4_swrqe *sw_rq;
 402         void __iomem *bar2_va;
 403         u64 bar2_pa;
 404         size_t memsize;
 405         u32 bar2_qid;
 406         u32 qid;
 407         u32 msn;
 408         u32 rqt_hwaddr;
 409         u32 rqt_abs_idx;
 410         u16 rqt_size;
 411         u16 size;
 412         u16 cidx;
 413         u16 pidx;
 414         u16 wq_pidx;
 415         u16 wq_pidx_inc;
 416         u16 in_use;
 417         struct t4_srq_pending_wr *pending_wrs;
 418         u16 pending_cidx;
 419         u16 pending_pidx;
 420         u16 pending_in_use;
 421         u16 ooo_count;
 422 };
 423
 424 static inline u32 t4_srq_avail(struct t4_srq *srq)
 425 {
 426         return srq->size - 1 - srq->in_use;
 427 }
 428
 429 static inline void t4_srq_produce(struct t4_srq *srq, u8 len16)
 430 {
 431         srq->in_use++;
 432         if (++srq->pidx == srq->size)
 433                 srq->pidx = 0;
 434         srq->wq_pidx += DIV_ROUND_UP(len16 * 16, T4_EQ_ENTRY_SIZE);
 435         if (srq->wq_pidx >= srq->size * T4_RQ_NUM_SLOTS)
 436                 srq->wq_pidx %= srq->size * T4_RQ_NUM_SLOTS;
 437         srq->queue[srq->size].status.host_pidx = srq->pidx;
 438 }
 439
 440 static inline void t4_srq_produce_pending_wr(struct t4_srq *srq)
 441 {
 442         srq->pending_in_use++;
 443         srq->in_use++;
 444         if (++srq->pending_pidx == srq->size)
 445                 srq->pending_pidx = 0;
 446 }
 447
 448 static inline void t4_srq_consume_pending_wr(struct t4_srq *srq)
 449 {
 450         srq->pending_in_use--;
 451         srq->in_use--;
 452         if (++srq->pending_cidx == srq->size)
 453                 srq->pending_cidx = 0;
 454 }
 455
 456 static inline void t4_srq_produce_ooo(struct t4_srq *srq)
 457 {
 458         srq->in_use--;
 459         srq->ooo_count++;
 460 }
 461
 462 static inline void t4_srq_consume_ooo(struct t4_srq *srq)
 463 {
 464         srq->cidx++;
 465         if (srq->cidx == srq->size)
 466                 srq->cidx  = 0;
 467         srq->queue[srq->size].status.host_cidx = srq->cidx;
 468         srq->ooo_count--;
 469 }
 470
 471 static inline void t4_srq_consume(struct t4_srq *srq)
 472 {
 473         srq->in_use--;
 474         if (++srq->cidx == srq->size)
 475                 srq->cidx = 0;
 476         srq->queue[srq->size].status.host_cidx = srq->cidx;
 477 }
 478
 479 static inline int t4_rqes_posted(struct t4_wq *wq)
 480 {
 481         return wq->rq.in_use;
 482 }
 483
 484 static inline int t4_rq_empty(struct t4_wq *wq)
 485 {
 486         return wq->rq.in_use == 0;
 487 }
 488
 489 static inline int t4_rq_full(struct t4_wq *wq)
 490 {
 491         return wq->rq.in_use == (wq->rq.size - 1);
 492 }
 493
 494 static inline u32 t4_rq_avail(struct t4_wq *wq)
 495 {
 496         return wq->rq.size - 1 - wq->rq.in_use;
 497 }
 498
 499 static inline void t4_rq_produce(struct t4_wq *wq, u8 len16)
 500 {
 501         wq->rq.in_use++;
 502         if (++wq->rq.pidx == wq->rq.size)
 503                 wq->rq.pidx = 0;
 504         wq->rq.wq_pidx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
 505         if (wq->rq.wq_pidx >= wq->rq.size * T4_RQ_NUM_SLOTS)
 506                 wq->rq.wq_pidx %= wq->rq.size * T4_RQ_NUM_SLOTS;
 507 }
 508
 509 static inline void t4_rq_consume(struct t4_wq *wq)
 510 {
 511         wq->rq.in_use--;
 512         if (++wq->rq.cidx == wq->rq.size)
 513                 wq->rq.cidx = 0;
 514 }
 515
 516 static inline u16 t4_rq_host_wq_pidx(struct t4_wq *wq)
 517 {
 518         return wq->rq.queue[wq->rq.size].status.host_wq_pidx;
 519 }
 520
 521 static inline u16 t4_rq_wq_size(struct t4_wq *wq)
 522 {
 523                 return wq->rq.size * T4_RQ_NUM_SLOTS;
 524 }
 525
 526 static inline int t4_sq_onchip(struct t4_sq *sq)
 527 {
 528         return sq->flags & T4_SQ_ONCHIP;
 529 }
 530
 531 static inline int t4_sq_empty(struct t4_wq *wq)
 532 {
 533         return wq->sq.in_use == 0;
 534 }
 535
 536 static inline int t4_sq_full(struct t4_wq *wq)
 537 {
 538         return wq->sq.in_use == (wq->sq.size - 1);
 539 }
 540
 541 static inline u32 t4_sq_avail(struct t4_wq *wq)
 542 {
 543         return wq->sq.size - 1 - wq->sq.in_use;
 544 }
 545
 546 static inline void t4_sq_produce(struct t4_wq *wq, u8 len16)
 547 {
 548         wq->sq.in_use++;
 549         if (++wq->sq.pidx == wq->sq.size)
 550                 wq->sq.pidx = 0;
 551         wq->sq.wq_pidx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
 552         if (wq->sq.wq_pidx >= wq->sq.size * T4_SQ_NUM_SLOTS)
 553                 wq->sq.wq_pidx %= wq->sq.size * T4_SQ_NUM_SLOTS;
 554 }
 555
 556 static inline void t4_sq_consume(struct t4_wq *wq)
 557 {
 558         if (wq->sq.cidx == wq->sq.flush_cidx)
 559                 wq->sq.flush_cidx = -1;
 560         wq->sq.in_use--;
 561         if (++wq->sq.cidx == wq->sq.size)
 562                 wq->sq.cidx = 0;
 563 }
 564
 565 static inline u16 t4_sq_host_wq_pidx(struct t4_wq *wq)
 566 {
 567         return wq->sq.queue[wq->sq.size].status.host_wq_pidx;
 568 }
 569
 570 static inline u16 t4_sq_wq_size(struct t4_wq *wq)
 571 {
 572                 return wq->sq.size * T4_SQ_NUM_SLOTS;
 573 }
 574
 575 /* This function copies 64 byte coalesced work request to memory
 576  * mapped BAR2 space. For coalesced WRs, the SGE fetches data
 577  * from the FIFO instead of from Host.
 578  */
 579 static inline void pio_copy(u64 __iomem *dst, u64 *src)
 580 {
 581         int count = 8;
 582
 583         while (count) {
 584                 writeq(*src, dst);
 585                 src++;
 586                 dst++;
 587                 count--;
 588         }
 589 }
 590
 591 static inline void t4_ring_srq_db(struct t4_srq *srq, u16 inc, u8 len16,
 592                                   union t4_recv_wr *wqe)
 593 {
 594         /* Flush host queue memory writes. */
 595         wmb();
 596         if (inc == 1 && srq->bar2_qid == 0 && wqe) {
 597                 pr_debug("%s : WC srq->pidx = %d; len16=%d\n",
 598                          __func__, srq->pidx, len16);
 599                 pio_copy(srq->bar2_va + SGE_UDB_WCDOORBELL, (u64 *)wqe);
 600         } else {
 601                 pr_debug("%s: DB srq->pidx = %d; len16=%d\n",
 602                          __func__, srq->pidx, len16);
 603                 writel(PIDX_T5_V(inc) | QID_V(srq->bar2_qid),
 604                        srq->bar2_va + SGE_UDB_KDOORBELL);
 605         }
 606         /* Flush user doorbell area writes. */
 607         wmb();
 608 }
 609
 610 static inline void t4_ring_sq_db(struct t4_wq *wq, u16 inc, union t4_wr *wqe)
 611 {
 612
 613         /* Flush host queue memory writes. */
 614         wmb();
 615         if (wq->sq.bar2_va) {
 616                 if (inc == 1 && wq->sq.bar2_qid == 0 && wqe) {
 617                         pr_debug("WC wq->sq.pidx = %d\n", wq->sq.pidx);
 618                         pio_copy((u64 __iomem *)
 619                                  (wq->sq.bar2_va + SGE_UDB_WCDOORBELL),
 620                                  (u64 *)wqe);
 621                 } else {
 622                         pr_debug("DB wq->sq.pidx = %d\n", wq->sq.pidx);
 623                         writel(PIDX_T5_V(inc) | QID_V(wq->sq.bar2_qid),
 624                                wq->sq.bar2_va + SGE_UDB_KDOORBELL);
 625                 }
 626
 627                 /* Flush user doorbell area writes. */
 628                 wmb();
 629                 return;
 630         }
 631         writel(QID_V(wq->sq.qid) | PIDX_V(inc), wq->db);
 632 }
 633
 634 static inline void t4_ring_rq_db(struct t4_wq *wq, u16 inc,
 635                                  union t4_recv_wr *wqe)
 636 {
 637
 638         /* Flush host queue memory writes. */
 639         wmb();
 640         if (wq->rq.bar2_va) {
 641                 if (inc == 1 && wq->rq.bar2_qid == 0 && wqe) {
 642                         pr_debug("WC wq->rq.pidx = %d\n", wq->rq.pidx);
 643                         pio_copy((u64 __iomem *)
 644                                  (wq->rq.bar2_va + SGE_UDB_WCDOORBELL),
 645                                  (void *)wqe);
 646                 } else {
 647                         pr_debug("DB wq->rq.pidx = %d\n", wq->rq.pidx);
 648                         writel(PIDX_T5_V(inc) | QID_V(wq->rq.bar2_qid),
 649                                wq->rq.bar2_va + SGE_UDB_KDOORBELL);
 650                 }
 651
 652                 /* Flush user doorbell area writes. */
 653                 wmb();
 654                 return;
 655         }
 656         writel(QID_V(wq->rq.qid) | PIDX_V(inc), wq->db);
 657 }
 658
 659 static inline int t4_wq_in_error(struct t4_wq *wq)
 660 {
 661         return *wq->qp_errp;
 662 }
 663
 664 static inline void t4_set_wq_in_error(struct t4_wq *wq, u32 srqidx)
 665 {
 666         if (srqidx)
 667                 *wq->srqidxp = srqidx;
 668         *wq->qp_errp = 1;
 669 }
 670
 671 static inline void t4_disable_wq_db(struct t4_wq *wq)
 672 {
 673         wq->rq.queue[wq->rq.size].status.db_off = 1;
 674 }
 675
 676 static inline void t4_enable_wq_db(struct t4_wq *wq)
 677 {
 678         wq->rq.queue[wq->rq.size].status.db_off = 0;
 679 }
 680
 681 static inline int t4_wq_db_enabled(struct t4_wq *wq)
 682 {
 683         return !wq->rq.queue[wq->rq.size].status.db_off;
 684 }
 685
 686 enum t4_cq_flags {
 687         CQ_ARMED        = 1,
 688 };
 689
 690 struct t4_cq {
 691         struct t4_cqe *queue;
 692         dma_addr_t dma_addr;
 693         DEFINE_DMA_UNMAP_ADDR(mapping);
 694         struct t4_cqe *sw_queue;
 695         void __iomem *gts;
 696         void __iomem *bar2_va;
 697         u64 bar2_pa;
 698         u32 bar2_qid;
 699         struct c4iw_rdev *rdev;
 700         size_t memsize;
 701         __be64 bits_type_ts;
 702         u32 cqid;
 703         u32 qid_mask;
 704         int vector;
 705         u16 size; /* including status page */
 706         u16 cidx;
 707         u16 sw_pidx;
 708         u16 sw_cidx;
 709         u16 sw_in_use;
 710         u16 cidx_inc;
 711         u8 gen;
 712         u8 error;
 713         u8 *qp_errp;
 714         unsigned long flags;
 715 };
 716
 717 static inline void write_gts(struct t4_cq *cq, u32 val)
 718 {
 719         if (cq->bar2_va)
 720                 writel(val | INGRESSQID_V(cq->bar2_qid),
 721                        cq->bar2_va + SGE_UDB_GTS);
 722         else
 723                 writel(val | INGRESSQID_V(cq->cqid), cq->gts);
 724 }
 725
 726 static inline int t4_clear_cq_armed(struct t4_cq *cq)
 727 {
 728         return test_and_clear_bit(CQ_ARMED, &cq->flags);
 729 }
 730
 731 static inline int t4_arm_cq(struct t4_cq *cq, int se)
 732 {
 733         u32 val;
 734
 735         set_bit(CQ_ARMED, &cq->flags);
 736         while (cq->cidx_inc > CIDXINC_M) {
 737                 val = SEINTARM_V(0) | CIDXINC_V(CIDXINC_M) | TIMERREG_V(7);
 738                 write_gts(cq, val);
 739                 cq->cidx_inc -= CIDXINC_M;
 740         }
 741         val = SEINTARM_V(se) | CIDXINC_V(cq->cidx_inc) | TIMERREG_V(6);
 742         write_gts(cq, val);
 743         cq->cidx_inc = 0;
 744         return 0;
 745 }
 746
 747 static inline void t4_swcq_produce(struct t4_cq *cq)
 748 {
 749         cq->sw_in_use++;
 750         if (cq->sw_in_use == cq->size) {
 751                 pr_warn("%s cxgb4 sw cq overflow cqid %u\n",
 752                         __func__, cq->cqid);
 753                 cq->error = 1;
 754                 cq->sw_in_use--;
 755                 return;
 756         }
 757         if (++cq->sw_pidx == cq->size)
 758                 cq->sw_pidx = 0;
 759 }
 760
 761 static inline void t4_swcq_consume(struct t4_cq *cq)
 762 {
 763         cq->sw_in_use--;
 764         if (++cq->sw_cidx == cq->size)
 765                 cq->sw_cidx = 0;
 766 }
 767
 768 static inline void t4_hwcq_consume(struct t4_cq *cq)
 769 {
 770         cq->bits_type_ts = cq->queue[cq->cidx].bits_type_ts;
 771         if (++cq->cidx_inc == (cq->size >> 4) || cq->cidx_inc == CIDXINC_M) {
 772                 u32 val;
 773
 774                 val = SEINTARM_V(0) | CIDXINC_V(cq->cidx_inc) | TIMERREG_V(7);
 775                 write_gts(cq, val);
 776                 cq->cidx_inc = 0;
 777         }
 778         if (++cq->cidx == cq->size) {
 779                 cq->cidx = 0;
 780                 cq->gen ^= 1;
 781         }
 782 }
 783
 784 static inline int t4_valid_cqe(struct t4_cq *cq, struct t4_cqe *cqe)
 785 {
 786         return (CQE_GENBIT(cqe) == cq->gen);
 787 }
 788
 789 static inline int t4_cq_notempty(struct t4_cq *cq)
 790 {
 791         return cq->sw_in_use || t4_valid_cqe(cq, &cq->queue[cq->cidx]);
 792 }
 793
 794 static inline int t4_next_hw_cqe(struct t4_cq *cq, struct t4_cqe **cqe)
 795 {
 796         int ret;
 797         u16 prev_cidx;
 798
 799         if (cq->cidx == 0)
 800                 prev_cidx = cq->size - 1;
 801         else
 802                 prev_cidx = cq->cidx - 1;
 803
 804         if (cq->queue[prev_cidx].bits_type_ts != cq->bits_type_ts) {
 805                 ret = -EOVERFLOW;
 806                 cq->error = 1;
 807                 pr_err("cq overflow cqid %u\n", cq->cqid);
 808         } else if (t4_valid_cqe(cq, &cq->queue[cq->cidx])) {
 809
 810                 /* Ensure CQE is flushed to memory */
 811                 rmb();
 812                 *cqe = &cq->queue[cq->cidx];
 813                 ret = 0;
 814         } else
 815                 ret = -ENODATA;
 816         return ret;
 817 }
 818
 819 static inline struct t4_cqe *t4_next_sw_cqe(struct t4_cq *cq)
 820 {
 821         if (cq->sw_in_use == cq->size) {
 822                 pr_warn("%s cxgb4 sw cq overflow cqid %u\n",
 823                         __func__, cq->cqid);
 824                 cq->error = 1;
 825                 return NULL;
 826         }
 827         if (cq->sw_in_use)
 828                 return &cq->sw_queue[cq->sw_cidx];
 829         return NULL;
 830 }
 831
 832 static inline int t4_next_cqe(struct t4_cq *cq, struct t4_cqe **cqe)
 833 {
 834         int ret = 0;
 835
 836         if (cq->error)
 837                 ret = -ENODATA;
 838         else if (cq->sw_in_use)
 839                 *cqe = &cq->sw_queue[cq->sw_cidx];
 840         else
 841                 ret = t4_next_hw_cqe(cq, cqe);
 842         return ret;
 843 }
 844
 845 static inline int t4_cq_in_error(struct t4_cq *cq)
 846 {
 847         return *cq->qp_errp;
 848 }
 849
 850 static inline void t4_set_cq_in_error(struct t4_cq *cq)
 851 {
 852         *cq->qp_errp = 1;
 853 }
 854 #endif
 855
 856 struct t4_dev_status_page {
 857         u8 db_off;
 858         u8 write_cmpl_supported;
 859         u16 pad2;
 860         u32 pad3;
 861         u64 qp_start;
 862         u64 qp_size;
 863         u64 cq_start;
 864         u64 cq_size;
 865 };