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
  57 #include <rdma/ib_verbs.h>
  58 #include <rdma/ib_user_verbs.h>
  59
  60 #ifdef CONFIG_PPC64
  61 #include "ehca_classes_pSeries.h"
  62 #endif
  63 #include "ipz_pt_fn.h"
  64 #include "ehca_qes.h"
  65 #include "ehca_irq.h"
  66
  67 #define EHCA_EQE_CACHE_SIZE 20
  68
  69 struct ehca_eqe_cache_entry {
  70         struct ehca_eqe *eqe;
  71         struct ehca_cq *cq;
  72 };
  73
  74 struct ehca_eq {
  75         u32 length;
  76         struct ipz_queue ipz_queue;
  77         struct ipz_eq_handle ipz_eq_handle;
  78         struct work_struct work;
  79         struct h_galpas galpas;
  80         int is_initialized;
  81         struct ehca_pfeq pf;
  82         spinlock_t spinlock;
  83         struct tasklet_struct interrupt_task;
  84         u32 ist;
  85         spinlock_t irq_spinlock;
  86         struct ehca_eqe_cache_entry eqe_cache[EHCA_EQE_CACHE_SIZE];
  87 };
  88
  89 struct ehca_sma_attr {
  90         u16 lid, lmc, sm_sl, sm_lid;
  91         u16 pkey_tbl_len, pkeys[16];
  92 };
  93
  94 struct ehca_sport {
  95         struct ib_cq *ibcq_aqp1;
  96         struct ib_qp *ibqp_aqp1;
  97         enum ib_rate  rate;
  98         enum ib_port_state port_state;
  99         struct ehca_sma_attr saved_attr;
 100 };
 101
 102 #define HCA_CAP_MR_PGSIZE_4K  1
 103 #define HCA_CAP_MR_PGSIZE_64K 2
 104 #define HCA_CAP_MR_PGSIZE_1M  4
 105 #define HCA_CAP_MR_PGSIZE_16M 8
 106
 107 struct ehca_shca {
 108         struct ib_device ib_device;
 109         struct ibmebus_dev *ibmebus_dev;
 110         u8 num_ports;
 111         int hw_level;
 112         struct list_head shca_list;
 113         struct ipz_adapter_handle ipz_hca_handle;
 114         struct ehca_sport sport[2];
 115         struct ehca_eq eq;
 116         struct ehca_eq neq;
 117         struct ehca_mr *maxmr;
 118         struct ehca_pd *pd;
 119         struct h_galpas galpas;
 120         struct mutex modify_mutex;
 121         u64 hca_cap;
 122         /* MR pgsize: bit 0-3 means 4K, 64K, 1M, 16M respectively */
 123         u32 hca_cap_mr_pgsize;
 124         int max_mtu;
 125 };
 126
 127 struct ehca_pd {
 128         struct ib_pd ib_pd;
 129         struct ipz_pd fw_pd;
 130         u32 ownpid;
 131         /* small queue mgmt */
 132         struct mutex lock;
 133         struct list_head free[2];
 134         struct list_head full[2];
 135 };
 136
 137 enum ehca_ext_qp_type {
 138         EQPT_NORMAL    = 0,
 139         EQPT_LLQP      = 1,
 140         EQPT_SRQBASE   = 2,
 141         EQPT_SRQ       = 3,
 142 };
 143
 144 struct ehca_qp {
 145         union {
 146                 struct ib_qp ib_qp;
 147                 struct ib_srq ib_srq;
 148         };
 149         u32 qp_type;
 150         enum ehca_ext_qp_type ext_type;
 151         struct ipz_queue ipz_squeue;
 152         struct ipz_queue ipz_rqueue;
 153         struct h_galpas galpas;
 154         u32 qkey;
 155         u32 real_qp_num;
 156         u32 token;
 157         spinlock_t spinlock_s;
 158         spinlock_t spinlock_r;
 159         u32 sq_max_inline_data_size;
 160         struct ipz_qp_handle ipz_qp_handle;
 161         struct ehca_pfqp pf;
 162         struct ib_qp_init_attr init_attr;
 163         struct ehca_cq *send_cq;
 164         struct ehca_cq *recv_cq;
 165         unsigned int sqerr_purgeflag;
 166         struct hlist_node list_entries;
 167         /* mmap counter for resources mapped into user space */
 168         u32 mm_count_squeue;
 169         u32 mm_count_rqueue;
 170         u32 mm_count_galpa;
 171 };
 172
 173 #define IS_SRQ(qp) (qp->ext_type == EQPT_SRQ)
 174 #define HAS_SQ(qp) (qp->ext_type != EQPT_SRQ)
 175 #define HAS_RQ(qp) (qp->ext_type != EQPT_SRQBASE)
 176
 177 /* must be power of 2 */
 178 #define QP_HASHTAB_LEN 8
 179
 180 struct ehca_cq {
 181         struct ib_cq ib_cq;
 182         struct ipz_queue ipz_queue;
 183         struct h_galpas galpas;
 184         spinlock_t spinlock;
 185         u32 cq_number;
 186         u32 token;
 187         u32 nr_of_entries;
 188         struct ipz_cq_handle ipz_cq_handle;
 189         struct ehca_pfcq pf;
 190         spinlock_t cb_lock;
 191         struct hlist_head qp_hashtab[QP_HASHTAB_LEN];
 192         struct list_head entry;
 193         u32 nr_callbacks;   /* #events assigned to cpu by scaling code */
 194         atomic_t nr_events; /* #events seen */
 195         wait_queue_head_t wait_completion;
 196         spinlock_t task_lock;
 197         u32 ownpid;
 198         /* mmap counter for resources mapped into user space */
 199         u32 mm_count_queue;
 200         u32 mm_count_galpa;
 201 };
 202
 203 enum ehca_mr_flag {
 204         EHCA_MR_FLAG_FMR = 0x80000000,   /* FMR, created with ehca_alloc_fmr */
 205         EHCA_MR_FLAG_MAXMR = 0x40000000, /* max-MR                           */
 206 };
 207
 208 struct ehca_mr {
 209         union {
 210                 struct ib_mr ib_mr;     /* must always be first in ehca_mr */
 211                 struct ib_fmr ib_fmr;   /* must always be first in ehca_mr */
 212         } ib;
 213         struct ib_umem *umem;
 214         spinlock_t mrlock;
 215
 216         enum ehca_mr_flag flags;
 217         u32 num_kpages;         /* number of kernel pages */
 218         u32 num_hwpages;        /* number of hw pages to form MR */
 219         u64 hwpage_size;        /* hw page size used for this MR */
 220         int acl;                /* ACL (stored here for usage in reregister) */
 221         u64 *start;             /* virtual start address (stored here for */
 222                                 /* usage in reregister) */
 223         u64 size;               /* size (stored here for usage in reregister) */
 224         u32 fmr_page_size;      /* page size for FMR */
 225         u32 fmr_max_pages;      /* max pages for FMR */
 226         u32 fmr_max_maps;       /* max outstanding maps for FMR */
 227         u32 fmr_map_cnt;        /* map counter for FMR */
 228         /* fw specific data */
 229         struct ipz_mrmw_handle ipz_mr_handle;   /* MR handle for h-calls */
 230         struct h_galpas galpas;
 231 };
 232
 233 struct ehca_mw {
 234         struct ib_mw ib_mw;     /* gen2 mw, must always be first in ehca_mw */
 235         spinlock_t mwlock;
 236
 237         u8 never_bound;         /* indication MW was never bound */
 238         struct ipz_mrmw_handle ipz_mw_handle;   /* MW handle for h-calls */
 239         struct h_galpas galpas;
 240 };
 241
 242 enum ehca_mr_pgi_type {
 243         EHCA_MR_PGI_PHYS   = 1,  /* type of ehca_reg_phys_mr,
 244                                   * ehca_rereg_phys_mr,
 245                                   * ehca_reg_internal_maxmr */
 246         EHCA_MR_PGI_USER   = 2,  /* type of ehca_reg_user_mr */
 247         EHCA_MR_PGI_FMR    = 3   /* type of ehca_map_phys_fmr */
 248 };
 249
 250 struct ehca_mr_pginfo {
 251         enum ehca_mr_pgi_type type;
 252         u64 num_kpages;
 253         u64 kpage_cnt;
 254         u64 hwpage_size;     /* hw page size used for this MR */
 255         u64 num_hwpages;     /* number of hw pages */
 256         u64 hwpage_cnt;      /* counter for hw pages */
 257         u64 next_hwpage;     /* next hw page in buffer/chunk/listelem */
 258
 259         union {
 260                 struct { /* type EHCA_MR_PGI_PHYS section */
 261                         int num_phys_buf;
 262                         struct ib_phys_buf *phys_buf_array;
 263                         u64 next_buf;
 264                 } phy;
 265                 struct { /* type EHCA_MR_PGI_USER section */
 266                         struct ib_umem *region;
 267                         struct ib_umem_chunk *next_chunk;
 268                         u64 next_nmap;
 269                 } usr;
 270                 struct { /* type EHCA_MR_PGI_FMR section */
 271                         u64 fmr_pgsize;
 272                         u64 *page_list;
 273                         u64 next_listelem;
 274                 } fmr;
 275         } u;
 276 };
 277
 278 /* output parameters for MR/FMR hipz calls */
 279 struct ehca_mr_hipzout_parms {
 280         struct ipz_mrmw_handle handle;
 281         u32 lkey;
 282         u32 rkey;
 283         u64 len;
 284         u64 vaddr;
 285         u32 acl;
 286 };
 287
 288 /* output parameters for MW hipz calls */
 289 struct ehca_mw_hipzout_parms {
 290         struct ipz_mrmw_handle handle;
 291         u32 rkey;
 292 };
 293
 294 struct ehca_av {
 295         struct ib_ah ib_ah;
 296         struct ehca_ud_av av;
 297 };
 298
 299 struct ehca_ucontext {
 300         struct ib_ucontext ib_ucontext;
 301 };
 302
 303 int ehca_init_pd_cache(void);
 304 void ehca_cleanup_pd_cache(void);
 305 int ehca_init_cq_cache(void);
 306 void ehca_cleanup_cq_cache(void);
 307 int ehca_init_qp_cache(void);
 308 void ehca_cleanup_qp_cache(void);
 309 int ehca_init_av_cache(void);
 310 void ehca_cleanup_av_cache(void);
 311 int ehca_init_mrmw_cache(void);
 312 void ehca_cleanup_mrmw_cache(void);
 313 int ehca_init_small_qp_cache(void);
 314 void ehca_cleanup_small_qp_cache(void);
 315
 316 extern rwlock_t ehca_qp_idr_lock;
 317 extern rwlock_t ehca_cq_idr_lock;
 318 extern struct idr ehca_qp_idr;
 319 extern struct idr ehca_cq_idr;
 320
 321 extern int ehca_static_rate;
 322 extern int ehca_port_act_time;
 323 extern int ehca_use_hp_mr;
 324 extern int ehca_scaling_code;
 325 extern int ehca_mr_largepage;
 326
 327 struct ipzu_queue_resp {
 328         u32 qe_size;      /* queue entry size */
 329         u32 act_nr_of_sg;
 330         u32 queue_length; /* queue length allocated in bytes */
 331         u32 pagesize;
 332         u32 toggle_state;
 333         u32 offset; /* save offset within a page for small_qp */
 334 };
 335
 336 struct ehca_create_cq_resp {
 337         u32 cq_number;
 338         u32 token;
 339         struct ipzu_queue_resp ipz_queue;
 340 };
 341
 342 struct ehca_create_qp_resp {
 343         u32 qp_num;
 344         u32 token;
 345         u32 qp_type;
 346         u32 ext_type;
 347         u32 qkey;
 348         /* qp_num assigned by ehca: sqp0/1 may have got different numbers */
 349         u32 real_qp_num;
 350         u32 dummy; /* padding for 8 byte alignment */
 351         struct ipzu_queue_resp ipz_squeue;
 352         struct ipzu_queue_resp ipz_rqueue;
 353 };
 354
 355 struct ehca_alloc_cq_parms {
 356         u32 nr_cqe;
 357         u32 act_nr_of_entries;
 358         u32 act_pages;
 359         struct ipz_eq_handle eq_handle;
 360 };
 361
 362 enum ehca_service_type {
 363         ST_RC  = 0,
 364         ST_UC  = 1,
 365         ST_RD  = 2,
 366         ST_UD  = 3,
 367 };
 368
 369 enum ehca_ll_comp_flags {
 370         LLQP_SEND_COMP = 0x20,
 371         LLQP_RECV_COMP = 0x40,
 372         LLQP_COMP_MASK = 0x60,
 373 };
 374
 375 struct ehca_alloc_queue_parms {
 376         /* input parameters */
 377         int max_wr;
 378         int max_sge;
 379         int page_size;
 380         int is_small;
 381
 382         /* output parameters */
 383         u16 act_nr_wqes;
 384         u8  act_nr_sges;
 385         u32 queue_size; /* bytes for small queues, pages otherwise */
 386 };
 387
 388 struct ehca_alloc_qp_parms {
 389         struct ehca_alloc_queue_parms squeue;
 390         struct ehca_alloc_queue_parms rqueue;
 391
 392         /* input parameters */
 393         enum ehca_service_type servicetype;
 394         int qp_storage;
 395         int sigtype;
 396         enum ehca_ext_qp_type ext_type;
 397         enum ehca_ll_comp_flags ll_comp_flags;
 398         int ud_av_l_key_ctl;
 399
 400         u32 token;
 401         struct ipz_eq_handle eq_handle;
 402         struct ipz_pd pd;
 403         struct ipz_cq_handle send_cq_handle, recv_cq_handle;
 404
 405         u32 srq_qpn, srq_token, srq_limit;
 406
 407         /* output parameters */
 408         u32 real_qp_num;
 409         struct ipz_qp_handle qp_handle;
 410         struct h_galpas galpas;
 411 };
 412
 413 int ehca_cq_assign_qp(struct ehca_cq *cq, struct ehca_qp *qp);
 414 int ehca_cq_unassign_qp(struct ehca_cq *cq, unsigned int qp_num);
 415 struct ehca_qp *ehca_cq_get_qp(struct ehca_cq *cq, int qp_num);
 416
 417 #endif