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
  70 struct ehca_eqe_cache_entry {
  71         struct ehca_eqe *eqe;
  72         struct ehca_cq *cq;
  73 };
  74
  75 struct ehca_eq {
  76         u32 length;
  77         struct ipz_queue ipz_queue;
  78         struct ipz_eq_handle ipz_eq_handle;
  79         struct work_struct work;
  80         struct h_galpas galpas;
  81         int is_initialized;
  82         struct ehca_pfeq pf;
  83         spinlock_t spinlock;
  84         struct tasklet_struct interrupt_task;
  85         u32 ist;
  86         spinlock_t irq_spinlock;
  87         struct ehca_eqe_cache_entry eqe_cache[EHCA_EQE_CACHE_SIZE];
  88 };
  89
  90 struct ehca_sma_attr {
  91         u16 lid, lmc, sm_sl, sm_lid;
  92         u16 pkey_tbl_len, pkeys[16];
  93 };
  94
  95 struct ehca_sport {
  96         struct ib_cq *ibcq_aqp1;
  97         struct ib_qp *ibqp_sqp[2];
  98         /* lock to serialze modify_qp() calls for sqp in normal
  99          * and irq path (when event PORT_ACTIVE is received first time)
 100          */
 101         spinlock_t mod_sqp_lock;
 102         enum ib_port_state port_state;
 103         struct ehca_sma_attr saved_attr;
 104         u32 pma_qp_nr;
 105 };
 106
 107 #define HCA_CAP_MR_PGSIZE_4K  0x80000000
 108 #define HCA_CAP_MR_PGSIZE_64K 0x40000000
 109 #define HCA_CAP_MR_PGSIZE_1M  0x20000000
 110 #define HCA_CAP_MR_PGSIZE_16M 0x10000000
 111
 112 struct ehca_shca {
 113         struct ib_device ib_device;
 114         struct of_device *ofdev;
 115         u8 num_ports;
 116         int hw_level;
 117         struct list_head shca_list;
 118         struct ipz_adapter_handle ipz_hca_handle;
 119         struct ehca_sport sport[2];
 120         struct ehca_eq eq;
 121         struct ehca_eq neq;
 122         struct ehca_mr *maxmr;
 123         struct ehca_pd *pd;
 124         struct h_galpas galpas;
 125         struct mutex modify_mutex;
 126         u64 hca_cap;
 127         /* MR pgsize: bit 0-3 means 4K, 64K, 1M, 16M respectively */
 128         u32 hca_cap_mr_pgsize;
 129         int max_mtu;
 130 };
 131
 132 struct ehca_pd {
 133         struct ib_pd ib_pd;
 134         struct ipz_pd fw_pd;
 135         u32 ownpid;
 136         /* small queue mgmt */
 137         struct mutex lock;
 138         struct list_head free[2];
 139         struct list_head full[2];
 140 };
 141
 142 enum ehca_ext_qp_type {
 143         EQPT_NORMAL    = 0,
 144         EQPT_LLQP      = 1,
 145         EQPT_SRQBASE   = 2,
 146         EQPT_SRQ       = 3,
 147 };
 148
 149 /* struct to cache modify_qp()'s parms for GSI/SMI qp */
 150 struct ehca_mod_qp_parm {
 151         int mask;
 152         struct ib_qp_attr attr;
 153 };
 154
 155 #define EHCA_MOD_QP_PARM_MAX 4
 156
 157 struct ehca_qp {
 158         union {
 159                 struct ib_qp ib_qp;
 160                 struct ib_srq ib_srq;
 161         };
 162         u32 qp_type;
 163         enum ehca_ext_qp_type ext_type;
 164         struct ipz_queue ipz_squeue;
 165         struct ipz_queue ipz_rqueue;
 166         struct h_galpas galpas;
 167         u32 qkey;
 168         u32 real_qp_num;
 169         u32 token;
 170         spinlock_t spinlock_s;
 171         spinlock_t spinlock_r;
 172         u32 sq_max_inline_data_size;
 173         struct ipz_qp_handle ipz_qp_handle;
 174         struct ehca_pfqp pf;
 175         struct ib_qp_init_attr init_attr;
 176         struct ehca_cq *send_cq;
 177         struct ehca_cq *recv_cq;
 178         unsigned int sqerr_purgeflag;
 179         struct hlist_node list_entries;
 180         /* array to cache modify_qp()'s parms for GSI/SMI qp */
 181         struct ehca_mod_qp_parm *mod_qp_parm;
 182         int mod_qp_parm_idx;
 183         /* mmap counter for resources mapped into user space */
 184         u32 mm_count_squeue;
 185         u32 mm_count_rqueue;
 186         u32 mm_count_galpa;
 187         /* unsolicited ack circumvention */
 188         int unsol_ack_circ;
 189         int mtu_shift;
 190         u32 message_count;
 191         u32 packet_count;
 192 };
 193
 194 #define IS_SRQ(qp) (qp->ext_type == EQPT_SRQ)
 195 #define HAS_SQ(qp) (qp->ext_type != EQPT_SRQ)
 196 #define HAS_RQ(qp) (qp->ext_type != EQPT_SRQBASE)
 197
 198 /* must be power of 2 */
 199 #define QP_HASHTAB_LEN 8
 200
 201 struct ehca_cq {
 202         struct ib_cq ib_cq;
 203         struct ipz_queue ipz_queue;
 204         struct h_galpas galpas;
 205         spinlock_t spinlock;
 206         u32 cq_number;
 207         u32 token;
 208         u32 nr_of_entries;
 209         struct ipz_cq_handle ipz_cq_handle;
 210         struct ehca_pfcq pf;
 211         spinlock_t cb_lock;
 212         struct hlist_head qp_hashtab[QP_HASHTAB_LEN];
 213         struct list_head entry;
 214         u32 nr_callbacks;   /* #events assigned to cpu by scaling code */
 215         atomic_t nr_events; /* #events seen */
 216         wait_queue_head_t wait_completion;
 217         spinlock_t task_lock;
 218         u32 ownpid;
 219         /* mmap counter for resources mapped into user space */
 220         u32 mm_count_queue;
 221         u32 mm_count_galpa;
 222 };
 223
 224 enum ehca_mr_flag {
 225         EHCA_MR_FLAG_FMR = 0x80000000,   /* FMR, created with ehca_alloc_fmr */
 226         EHCA_MR_FLAG_MAXMR = 0x40000000, /* max-MR                           */
 227 };
 228
 229 struct ehca_mr {
 230         union {
 231                 struct ib_mr ib_mr;     /* must always be first in ehca_mr */
 232                 struct ib_fmr ib_fmr;   /* must always be first in ehca_mr */
 233         } ib;
 234         struct ib_umem *umem;
 235         spinlock_t mrlock;
 236
 237         enum ehca_mr_flag flags;
 238         u32 num_kpages;         /* number of kernel pages */
 239         u32 num_hwpages;        /* number of hw pages to form MR */
 240         u64 hwpage_size;        /* hw page size used for this MR */
 241         int acl;                /* ACL (stored here for usage in reregister) */
 242         u64 *start;             /* virtual start address (stored here for */
 243                                 /* usage in reregister) */
 244         u64 size;               /* size (stored here for usage in reregister) */
 245         u32 fmr_page_size;      /* page size for FMR */
 246         u32 fmr_max_pages;      /* max pages for FMR */
 247         u32 fmr_max_maps;       /* max outstanding maps for FMR */
 248         u32 fmr_map_cnt;        /* map counter for FMR */
 249         /* fw specific data */
 250         struct ipz_mrmw_handle ipz_mr_handle;   /* MR handle for h-calls */
 251         struct h_galpas galpas;
 252 };
 253
 254 struct ehca_mw {
 255         struct ib_mw ib_mw;     /* gen2 mw, must always be first in ehca_mw */
 256         spinlock_t mwlock;
 257
 258         u8 never_bound;         /* indication MW was never bound */
 259         struct ipz_mrmw_handle ipz_mw_handle;   /* MW handle for h-calls */
 260         struct h_galpas galpas;
 261 };
 262
 263 enum ehca_mr_pgi_type {
 264         EHCA_MR_PGI_PHYS   = 1,  /* type of ehca_reg_phys_mr,
 265                                   * ehca_rereg_phys_mr,
 266                                   * ehca_reg_internal_maxmr */
 267         EHCA_MR_PGI_USER   = 2,  /* type of ehca_reg_user_mr */
 268         EHCA_MR_PGI_FMR    = 3   /* type of ehca_map_phys_fmr */
 269 };
 270
 271 struct ehca_mr_pginfo {
 272         enum ehca_mr_pgi_type type;
 273         u64 num_kpages;
 274         u64 kpage_cnt;
 275         u64 hwpage_size;     /* hw page size used for this MR */
 276         u64 num_hwpages;     /* number of hw pages */
 277         u64 hwpage_cnt;      /* counter for hw pages */
 278         u64 next_hwpage;     /* next hw page in buffer/chunk/listelem */
 279
 280         union {
 281                 struct { /* type EHCA_MR_PGI_PHYS section */
 282                         int num_phys_buf;
 283                         struct ib_phys_buf *phys_buf_array;
 284                         u64 next_buf;
 285                 } phy;
 286                 struct { /* type EHCA_MR_PGI_USER section */
 287                         struct ib_umem *region;
 288                         struct ib_umem_chunk *next_chunk;
 289                         u64 next_nmap;
 290                 } usr;
 291                 struct { /* type EHCA_MR_PGI_FMR section */
 292                         u64 fmr_pgsize;
 293                         u64 *page_list;
 294                         u64 next_listelem;
 295                 } fmr;
 296         } u;
 297 };
 298
 299 /* output parameters for MR/FMR hipz calls */
 300 struct ehca_mr_hipzout_parms {
 301         struct ipz_mrmw_handle handle;
 302         u32 lkey;
 303         u32 rkey;
 304         u64 len;
 305         u64 vaddr;
 306         u32 acl;
 307 };
 308
 309 /* output parameters for MW hipz calls */
 310 struct ehca_mw_hipzout_parms {
 311         struct ipz_mrmw_handle handle;
 312         u32 rkey;
 313 };
 314
 315 struct ehca_av {
 316         struct ib_ah ib_ah;
 317         struct ehca_ud_av av;
 318 };
 319
 320 struct ehca_ucontext {
 321         struct ib_ucontext ib_ucontext;
 322 };
 323
 324 int ehca_init_pd_cache(void);
 325 void ehca_cleanup_pd_cache(void);
 326 int ehca_init_cq_cache(void);
 327 void ehca_cleanup_cq_cache(void);
 328 int ehca_init_qp_cache(void);
 329 void ehca_cleanup_qp_cache(void);
 330 int ehca_init_av_cache(void);
 331 void ehca_cleanup_av_cache(void);
 332 int ehca_init_mrmw_cache(void);
 333 void ehca_cleanup_mrmw_cache(void);
 334 int ehca_init_small_qp_cache(void);
 335 void ehca_cleanup_small_qp_cache(void);
 336
 337 extern rwlock_t ehca_qp_idr_lock;
 338 extern rwlock_t ehca_cq_idr_lock;
 339 extern struct idr ehca_qp_idr;
 340 extern struct idr ehca_cq_idr;
 341
 342 extern int ehca_static_rate;
 343 extern int ehca_port_act_time;
 344 extern int ehca_use_hp_mr;
 345 extern int ehca_scaling_code;
 346 extern int ehca_lock_hcalls;
 347 extern int ehca_nr_ports;
 348
 349 struct ipzu_queue_resp {
 350         u32 qe_size;      /* queue entry size */
 351         u32 act_nr_of_sg;
 352         u32 queue_length; /* queue length allocated in bytes */
 353         u32 pagesize;
 354         u32 toggle_state;
 355         u32 offset; /* save offset within a page for small_qp */
 356 };
 357
 358 struct ehca_create_cq_resp {
 359         u32 cq_number;
 360         u32 token;
 361         struct ipzu_queue_resp ipz_queue;
 362         u32 fw_handle_ofs;
 363         u32 dummy;
 364 };
 365
 366 struct ehca_create_qp_resp {
 367         u32 qp_num;
 368         u32 token;
 369         u32 qp_type;
 370         u32 ext_type;
 371         u32 qkey;
 372         /* qp_num assigned by ehca: sqp0/1 may have got different numbers */
 373         u32 real_qp_num;
 374         u32 fw_handle_ofs;
 375         u32 dummy;
 376         struct ipzu_queue_resp ipz_squeue;
 377         struct ipzu_queue_resp ipz_rqueue;
 378 };
 379
 380 struct ehca_alloc_cq_parms {
 381         u32 nr_cqe;
 382         u32 act_nr_of_entries;
 383         u32 act_pages;
 384         struct ipz_eq_handle eq_handle;
 385 };
 386
 387 enum ehca_service_type {
 388         ST_RC  = 0,
 389         ST_UC  = 1,
 390         ST_RD  = 2,
 391         ST_UD  = 3,
 392 };
 393
 394 enum ehca_ll_comp_flags {
 395         LLQP_SEND_COMP = 0x20,
 396         LLQP_RECV_COMP = 0x40,
 397         LLQP_COMP_MASK = 0x60,
 398 };
 399
 400 struct ehca_alloc_queue_parms {
 401         /* input parameters */
 402         int max_wr;
 403         int max_sge;
 404         int page_size;
 405         int is_small;
 406
 407         /* output parameters */
 408         u16 act_nr_wqes;
 409         u8  act_nr_sges;
 410         u32 queue_size; /* bytes for small queues, pages otherwise */
 411 };
 412
 413 struct ehca_alloc_qp_parms {
 414         struct ehca_alloc_queue_parms squeue;
 415         struct ehca_alloc_queue_parms rqueue;
 416
 417         /* input parameters */
 418         enum ehca_service_type servicetype;
 419         int qp_storage;
 420         int sigtype;
 421         enum ehca_ext_qp_type ext_type;
 422         enum ehca_ll_comp_flags ll_comp_flags;
 423         int ud_av_l_key_ctl;
 424
 425         u32 token;
 426         struct ipz_eq_handle eq_handle;
 427         struct ipz_pd pd;
 428         struct ipz_cq_handle send_cq_handle, recv_cq_handle;
 429
 430         u32 srq_qpn, srq_token, srq_limit;
 431
 432         /* output parameters */
 433         u32 real_qp_num;
 434         struct ipz_qp_handle qp_handle;
 435         struct h_galpas galpas;
 436 };
 437
 438 int ehca_cq_assign_qp(struct ehca_cq *cq, struct ehca_qp *qp);
 439 int ehca_cq_unassign_qp(struct ehca_cq *cq, unsigned int qp_num);
 440 struct ehca_qp *ehca_cq_get_qp(struct ehca_cq *cq, int qp_num);
 441
 442 #endif