drivers/infiniband/hw/ehca/ehca_classes.h

   1 /*
   2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
   3  *
   4  *  Struct definition for eHCA internal structures
   5  *
   6  *  Authors: Heiko J Schick <schickhj@de.ibm.com>
   7  *           Christoph Raisch <raisch@de.ibm.com>
   8  *           Joachim Fenkes <fenkes@de.ibm.com>
   9  *
  10  *  Copyright (c) 2005 IBM Corporation
  11  *
  12  *  All rights reserved.
  13  *
  14  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
  15  *  BSD.
  16  *
  17  * OpenIB BSD License
  18  *
  19  * Redistribution and use in source and binary forms, with or without
  20  * modification, are permitted provided that the following conditions are met:
  21  *
  22  * Redistributions of source code must retain the above copyright notice, this
  23  * list of conditions and the following disclaimer.
  24  *
  25  * Redistributions in binary form must reproduce the above copyright notice,
  26  * this list of conditions and the following disclaimer in the documentation
  27  * and/or other materials
  28  * provided with the distribution.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  31  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  33  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  34  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  35  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  36  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  37  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  38  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  39  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  40  * POSSIBILITY OF SUCH DAMAGE.
  41  */
  42
  43 #ifndef __EHCA_CLASSES_H__
  44 #define __EHCA_CLASSES_H__
  45
  46 struct ehca_module;
  47 struct ehca_qp;
  48 struct ehca_cq;
  49 struct ehca_eq;
  50 struct ehca_mr;
  51 struct ehca_mw;
  52 struct ehca_pd;
  53 struct ehca_av;
  54
  55 #include <linux/wait.h>
  56 #include <linux/mutex.h>
  57
  58 #include <rdma/ib_verbs.h>
  59 #include <rdma/ib_user_verbs.h>
  60
  61 #ifdef CONFIG_PPC64
  62 #include "ehca_classes_pSeries.h"
  63 #endif
  64 #include "ipz_pt_fn.h"
  65 #include "ehca_qes.h"
  66 #include "ehca_irq.h"
  67
  68 #define EHCA_EQE_CACHE_SIZE 20
  69 #define EHCA_MAX_NUM_QUEUES 0xffff
  70
  71 struct ehca_eqe_cache_entry {
  72         struct ehca_eqe *eqe;
  73         struct ehca_cq *cq;
  74 };
  75
  76 struct ehca_eq {
  77         u32 length;
  78         struct ipz_queue ipz_queue;
  79         struct ipz_eq_handle ipz_eq_handle;
  80         struct work_struct work;
  81         struct h_galpas galpas;
  82         int is_initialized;
  83         struct ehca_pfeq pf;
  84         spinlock_t spinlock;
  85         struct tasklet_struct interrupt_task;
  86         u32 ist;
  87         spinlock_t irq_spinlock;
  88         struct ehca_eqe_cache_entry eqe_cache[EHCA_EQE_CACHE_SIZE];
  89 };
  90
  91 struct ehca_sma_attr {
  92         u16 lid, lmc, sm_sl, sm_lid;
  93         u16 pkey_tbl_len, pkeys[16];
  94 };
  95
  96 struct ehca_sport {
  97         struct ib_cq *ibcq_aqp1;
  98         struct ib_qp *ibqp_sqp[2];
  99         /* lock to serialze modify_qp() calls for sqp in normal
 100          * and irq path (when event PORT_ACTIVE is received first time)
 101          */
 102         spinlock_t mod_sqp_lock;
 103         enum ib_port_state port_state;
 104         struct ehca_sma_attr saved_attr;
 105         u32 pma_qp_nr;
 106 };
 107
 108 #define HCA_CAP_MR_PGSIZE_4K  0x80000000
 109 #define HCA_CAP_MR_PGSIZE_64K 0x40000000
 110 #define HCA_CAP_MR_PGSIZE_1M  0x20000000
 111 #define HCA_CAP_MR_PGSIZE_16M 0x10000000
 112
 113 struct ehca_shca {
 114         struct ib_device ib_device;
 115         struct platform_device *ofdev;
 116         u8 num_ports;
 117         int hw_level;
 118         struct list_head shca_list;
 119         struct ipz_adapter_handle ipz_hca_handle;
 120         struct ehca_sport sport[2];
 121         struct ehca_eq eq;
 122         struct ehca_eq neq;
 123         struct ehca_mr *maxmr;
 124         struct ehca_pd *pd;
 125         struct h_galpas galpas;
 126         struct mutex modify_mutex;
 127         u64 hca_cap;
 128         /* MR pgsize: bit 0-3 means 4K, 64K, 1M, 16M respectively */
 129         u32 hca_cap_mr_pgsize;
 130         int max_mtu;
 131         int max_num_qps;
 132         int max_num_cqs;
 133         atomic_t num_cqs;
 134         atomic_t num_qps;
 135 };
 136
 137 struct ehca_pd {
 138         struct ib_pd ib_pd;
 139         struct ipz_pd fw_pd;
 140         /* small queue mgmt */
 141         struct mutex lock;
 142         struct list_head free[2];
 143         struct list_head full[2];
 144 };
 145
 146 enum ehca_ext_qp_type {
 147         EQPT_NORMAL    = 0,
 148         EQPT_LLQP      = 1,
 149         EQPT_SRQBASE   = 2,
 150         EQPT_SRQ       = 3,
 151 };
 152
 153 /* struct to cache modify_qp()'s parms for GSI/SMI qp */
 154 struct ehca_mod_qp_parm {
 155         int mask;
 156         struct ib_qp_attr attr;
 157 };
 158
 159 #define EHCA_MOD_QP_PARM_MAX 4
 160
 161 #define QMAP_IDX_MASK 0xFFFFULL
 162
 163 /* struct for tracking if cqes have been reported to the application */
 164 struct ehca_qmap_entry {
 165         u16 app_wr_id;
 166         u8 reported;
 167         u8 cqe_req;
 168 };
 169
 170 struct ehca_queue_map {
 171         struct ehca_qmap_entry *map;
 172         unsigned int entries;
 173         unsigned int tail;
 174         unsigned int left_to_poll;
 175         unsigned int next_wqe_idx;   /* Idx to first wqe to be flushed */
 176 };
 177
 178 /* function to calculate the next index for the qmap */
 179 static inline unsigned int next_index(unsigned int cur_index, unsigned int limit)
 180 {
 181         unsigned int temp = cur_index + 1;
 182         return (temp == limit) ? 0 : temp;
 183 }
 184
 185 struct ehca_qp {
 186         union {
 187                 struct ib_qp ib_qp;
 188                 struct ib_srq ib_srq;
 189         };
 190         u32 qp_type;
 191         enum ehca_ext_qp_type ext_type;
 192         enum ib_qp_state state;
 193         struct ipz_queue ipz_squeue;
 194         struct ehca_queue_map sq_map;
 195         struct ipz_queue ipz_rqueue;
 196         struct ehca_queue_map rq_map;
 197         struct h_galpas galpas;
 198         u32 qkey;
 199         u32 real_qp_num;
 200         u32 token;
 201         spinlock_t spinlock_s;
 202         spinlock_t spinlock_r;
 203         u32 sq_max_inline_data_size;
 204         struct ipz_qp_handle ipz_qp_handle;
 205         struct ehca_pfqp pf;
 206         struct ib_qp_init_attr init_attr;
 207         struct ehca_cq *send_cq;
 208         struct ehca_cq *recv_cq;
 209         unsigned int sqerr_purgeflag;
 210         struct hlist_node list_entries;
 211         /* array to cache modify_qp()'s parms for GSI/SMI qp */
 212         struct ehca_mod_qp_parm *mod_qp_parm;
 213         int mod_qp_parm_idx;
 214         /* mmap counter for resources mapped into user space */
 215         u32 mm_count_squeue;
 216         u32 mm_count_rqueue;
 217         u32 mm_count_galpa;
 218         /* unsolicited ack circumvention */
 219         int unsol_ack_circ;
 220         int mtu_shift;
 221         u32 message_count;
 222         u32 packet_count;
 223         atomic_t nr_events; /* events seen */
 224         wait_queue_head_t wait_completion;
 225         int mig_armed;
 226         struct list_head sq_err_node;
 227         struct list_head rq_err_node;
 228 };
 229
 230 #define IS_SRQ(qp) (qp->ext_type == EQPT_SRQ)
 231 #define HAS_SQ(qp) (qp->ext_type != EQPT_SRQ)
 232 #define HAS_RQ(qp) (qp->ext_type != EQPT_SRQBASE)
 233
 234 /* must be power of 2 */
 235 #define QP_HASHTAB_LEN 8
 236
 237 struct ehca_cq {
 238         struct ib_cq ib_cq;
 239         struct ipz_queue ipz_queue;
 240         struct h_galpas galpas;
 241         spinlock_t spinlock;
 242         u32 cq_number;
 243         u32 token;
 244         u32 nr_of_entries;
 245         struct ipz_cq_handle ipz_cq_handle;
 246         struct ehca_pfcq pf;
 247         spinlock_t cb_lock;
 248         struct hlist_head qp_hashtab[QP_HASHTAB_LEN];
 249         struct list_head entry;
 250         u32 nr_callbacks;   /* #events assigned to cpu by scaling code */
 251         atomic_t nr_events; /* #events seen */
 252         wait_queue_head_t wait_completion;
 253         spinlock_t task_lock;
 254         /* mmap counter for resources mapped into user space */
 255         u32 mm_count_queue;
 256         u32 mm_count_galpa;
 257         struct list_head sqp_err_list;
 258         struct list_head rqp_err_list;
 259 };
 260
 261 enum ehca_mr_flag {
 262         EHCA_MR_FLAG_FMR = 0x80000000,   /* FMR, created with ehca_alloc_fmr */
 263         EHCA_MR_FLAG_MAXMR = 0x40000000, /* max-MR                           */
 264 };
 265
 266 struct ehca_mr {
 267         union {
 268                 struct ib_mr ib_mr;     /* must always be first in ehca_mr */
 269                 struct ib_fmr ib_fmr;   /* must always be first in ehca_mr */
 270         } ib;
 271         struct ib_umem *umem;
 272         spinlock_t mrlock;
 273
 274         enum ehca_mr_flag flags;
 275         u32 num_kpages;         /* number of kernel pages */
 276         u32 num_hwpages;        /* number of hw pages to form MR */
 277         u64 hwpage_size;        /* hw page size used for this MR */
 278         int acl;                /* ACL (stored here for usage in reregister) */
 279         u64 *start;             /* virtual start address (stored here for */
 280                                 /* usage in reregister) */
 281         u64 size;               /* size (stored here for usage in reregister) */
 282         u32 fmr_page_size;      /* page size for FMR */
 283         u32 fmr_max_pages;      /* max pages for FMR */
 284         u32 fmr_max_maps;       /* max outstanding maps for FMR */
 285         u32 fmr_map_cnt;        /* map counter for FMR */
 286         /* fw specific data */
 287         struct ipz_mrmw_handle ipz_mr_handle;   /* MR handle for h-calls */
 288         struct h_galpas galpas;
 289 };
 290
 291 struct ehca_mw {
 292         struct ib_mw ib_mw;     /* gen2 mw, must always be first in ehca_mw */
 293         spinlock_t mwlock;
 294
 295         u8 never_bound;         /* indication MW was never bound */
 296         struct ipz_mrmw_handle ipz_mw_handle;   /* MW handle for h-calls */
 297         struct h_galpas galpas;
 298 };
 299
 300 enum ehca_mr_pgi_type {
 301         EHCA_MR_PGI_PHYS   = 1,  /* type of ehca_reg_phys_mr,
 302                                   * ehca_rereg_phys_mr,
 303                                   * ehca_reg_internal_maxmr */
 304         EHCA_MR_PGI_USER   = 2,  /* type of ehca_reg_user_mr */
 305         EHCA_MR_PGI_FMR    = 3   /* type of ehca_map_phys_fmr */
 306 };
 307
 308 struct ehca_mr_pginfo {
 309         enum ehca_mr_pgi_type type;
 310         u64 num_kpages;
 311         u64 kpage_cnt;
 312         u64 hwpage_size;     /* hw page size used for this MR */
 313         u64 num_hwpages;     /* number of hw pages */
 314         u64 hwpage_cnt;      /* counter for hw pages */
 315         u64 next_hwpage;     /* next hw page in buffer/chunk/listelem */
 316
 317         union {
 318                 struct { /* type EHCA_MR_PGI_PHYS section */
 319                         int num_phys_buf;
 320                         struct ib_phys_buf *phys_buf_array;
 321                         u64 next_buf;
 322                 } phy;
 323                 struct { /* type EHCA_MR_PGI_USER section */
 324                         struct ib_umem *region;
 325                         struct ib_umem_chunk *next_chunk;
 326                         u64 next_nmap;
 327                 } usr;
 328                 struct { /* type EHCA_MR_PGI_FMR section */
 329                         u64 fmr_pgsize;
 330                         u64 *page_list;
 331                         u64 next_listelem;
 332                 } fmr;
 333         } u;
 334 };
 335
 336 /* output parameters for MR/FMR hipz calls */
 337 struct ehca_mr_hipzout_parms {
 338         struct ipz_mrmw_handle handle;
 339         u32 lkey;
 340         u32 rkey;
 341         u64 len;
 342         u64 vaddr;
 343         u32 acl;
 344 };
 345
 346 /* output parameters for MW hipz calls */
 347 struct ehca_mw_hipzout_parms {
 348         struct ipz_mrmw_handle handle;
 349         u32 rkey;
 350 };
 351
 352 struct ehca_av {
 353         struct ib_ah ib_ah;
 354         struct ehca_ud_av av;
 355 };
 356
 357 struct ehca_ucontext {
 358         struct ib_ucontext ib_ucontext;
 359 };
 360
 361 int ehca_init_pd_cache(void);
 362 void ehca_cleanup_pd_cache(void);
 363 int ehca_init_cq_cache(void);
 364 void ehca_cleanup_cq_cache(void);
 365 int ehca_init_qp_cache(void);
 366 void ehca_cleanup_qp_cache(void);
 367 int ehca_init_av_cache(void);
 368 void ehca_cleanup_av_cache(void);
 369 int ehca_init_mrmw_cache(void);
 370 void ehca_cleanup_mrmw_cache(void);
 371 int ehca_init_small_qp_cache(void);
 372 void ehca_cleanup_small_qp_cache(void);
 373
 374 extern rwlock_t ehca_qp_idr_lock;
 375 extern rwlock_t ehca_cq_idr_lock;
 376 extern struct idr ehca_qp_idr;
 377 extern struct idr ehca_cq_idr;
 378 extern spinlock_t shca_list_lock;
 379
 380 extern int ehca_static_rate;
 381 extern int ehca_port_act_time;
 382 extern bool ehca_use_hp_mr;
 383 extern bool ehca_scaling_code;
 384 extern int ehca_lock_hcalls;
 385 extern int ehca_nr_ports;
 386 extern int ehca_max_cq;
 387 extern int ehca_max_qp;
 388
 389 struct ipzu_queue_resp {
 390         u32 qe_size;      /* queue entry size */
 391         u32 act_nr_of_sg;
 392         u32 queue_length; /* queue length allocated in bytes */
 393         u32 pagesize;
 394         u32 toggle_state;
 395         u32 offset; /* save offset within a page for small_qp */
 396 };
 397
 398 struct ehca_create_cq_resp {
 399         u32 cq_number;
 400         u32 token;
 401         struct ipzu_queue_resp ipz_queue;
 402         u32 fw_handle_ofs;
 403         u32 dummy;
 404 };
 405
 406 struct ehca_create_qp_resp {
 407         u32 qp_num;
 408         u32 token;
 409         u32 qp_type;
 410         u32 ext_type;
 411         u32 qkey;
 412         /* qp_num assigned by ehca: sqp0/1 may have got different numbers */
 413         u32 real_qp_num;
 414         u32 fw_handle_ofs;
 415         u32 dummy;
 416         struct ipzu_queue_resp ipz_squeue;
 417         struct ipzu_queue_resp ipz_rqueue;
 418 };
 419
 420 struct ehca_alloc_cq_parms {
 421         u32 nr_cqe;
 422         u32 act_nr_of_entries;
 423         u32 act_pages;
 424         struct ipz_eq_handle eq_handle;
 425 };
 426
 427 enum ehca_service_type {
 428         ST_RC  = 0,
 429         ST_UC  = 1,
 430         ST_RD  = 2,
 431         ST_UD  = 3,
 432 };
 433
 434 enum ehca_ll_comp_flags {
 435         LLQP_SEND_COMP = 0x20,
 436         LLQP_RECV_COMP = 0x40,
 437         LLQP_COMP_MASK = 0x60,
 438 };
 439
 440 struct ehca_alloc_queue_parms {
 441         /* input parameters */
 442         int max_wr;
 443         int max_sge;
 444         int page_size;
 445         int is_small;
 446
 447         /* output parameters */
 448         u16 act_nr_wqes;
 449         u8  act_nr_sges;
 450         u32 queue_size; /* bytes for small queues, pages otherwise */
 451 };
 452
 453 struct ehca_alloc_qp_parms {
 454         struct ehca_alloc_queue_parms squeue;
 455         struct ehca_alloc_queue_parms rqueue;
 456
 457         /* input parameters */
 458         enum ehca_service_type servicetype;
 459         int qp_storage;
 460         int sigtype;
 461         enum ehca_ext_qp_type ext_type;
 462         enum ehca_ll_comp_flags ll_comp_flags;
 463         int ud_av_l_key_ctl;
 464
 465         u32 token;
 466         struct ipz_eq_handle eq_handle;
 467         struct ipz_pd pd;
 468         struct ipz_cq_handle send_cq_handle, recv_cq_handle;
 469
 470         u32 srq_qpn, srq_token, srq_limit;
 471
 472         /* output parameters */
 473         u32 real_qp_num;
 474         struct ipz_qp_handle qp_handle;
 475         struct h_galpas galpas;
 476 };
 477
 478 int ehca_cq_assign_qp(struct ehca_cq *cq, struct ehca_qp *qp);
 479 int ehca_cq_unassign_qp(struct ehca_cq *cq, unsigned int qp_num);
 480 struct ehca_qp *ehca_cq_get_qp(struct ehca_cq *cq, int qp_num);
 481
 482 #endif