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_aqp1;
  98         enum ib_rate  rate;
  99         enum ib_port_state port_state;
 100         struct ehca_sma_attr saved_attr;
 101 };
 102
 103 #define HCA_CAP_MR_PGSIZE_4K  0x80000000
 104 #define HCA_CAP_MR_PGSIZE_64K 0x40000000
 105 #define HCA_CAP_MR_PGSIZE_1M  0x20000000
 106 #define HCA_CAP_MR_PGSIZE_16M 0x10000000
 107
 108 struct ehca_shca {
 109         struct ib_device ib_device;
 110         struct ibmebus_dev *ibmebus_dev;
 111         u8 num_ports;
 112         int hw_level;
 113         struct list_head shca_list;
 114         struct ipz_adapter_handle ipz_hca_handle;
 115         struct ehca_sport sport[2];
 116         struct ehca_eq eq;
 117         struct ehca_eq neq;
 118         struct ehca_mr *maxmr;
 119         struct ehca_pd *pd;
 120         struct h_galpas galpas;
 121         struct mutex modify_mutex;
 122         u64 hca_cap;
 123         /* MR pgsize: bit 0-3 means 4K, 64K, 1M, 16M respectively */
 124         u32 hca_cap_mr_pgsize;
 125         int max_mtu;
 126 };
 127
 128 struct ehca_pd {
 129         struct ib_pd ib_pd;
 130         struct ipz_pd fw_pd;
 131         u32 ownpid;
 132         /* small queue mgmt */
 133         struct mutex lock;
 134         struct list_head free[2];
 135         struct list_head full[2];
 136 };
 137
 138 enum ehca_ext_qp_type {
 139         EQPT_NORMAL    = 0,
 140         EQPT_LLQP      = 1,
 141         EQPT_SRQBASE   = 2,
 142         EQPT_SRQ       = 3,
 143 };
 144
 145 struct ehca_qp {
 146         union {
 147                 struct ib_qp ib_qp;
 148                 struct ib_srq ib_srq;
 149         };
 150         u32 qp_type;
 151         enum ehca_ext_qp_type ext_type;
 152         struct ipz_queue ipz_squeue;
 153         struct ipz_queue ipz_rqueue;
 154         struct h_galpas galpas;
 155         u32 qkey;
 156         u32 real_qp_num;
 157         u32 token;
 158         spinlock_t spinlock_s;
 159         spinlock_t spinlock_r;
 160         u32 sq_max_inline_data_size;
 161         struct ipz_qp_handle ipz_qp_handle;
 162         struct ehca_pfqp pf;
 163         struct ib_qp_init_attr init_attr;
 164         struct ehca_cq *send_cq;
 165         struct ehca_cq *recv_cq;
 166         unsigned int sqerr_purgeflag;
 167         struct hlist_node list_entries;
 168         /* mmap counter for resources mapped into user space */
 169         u32 mm_count_squeue;
 170         u32 mm_count_rqueue;
 171         u32 mm_count_galpa;
 172 };
 173
 174 #define IS_SRQ(qp) (qp->ext_type == EQPT_SRQ)
 175 #define HAS_SQ(qp) (qp->ext_type != EQPT_SRQ)
 176 #define HAS_RQ(qp) (qp->ext_type != EQPT_SRQBASE)
 177
 178 /* must be power of 2 */
 179 #define QP_HASHTAB_LEN 8
 180
 181 struct ehca_cq {
 182         struct ib_cq ib_cq;
 183         struct ipz_queue ipz_queue;
 184         struct h_galpas galpas;
 185         spinlock_t spinlock;
 186         u32 cq_number;
 187         u32 token;
 188         u32 nr_of_entries;
 189         struct ipz_cq_handle ipz_cq_handle;
 190         struct ehca_pfcq pf;
 191         spinlock_t cb_lock;
 192         struct hlist_head qp_hashtab[QP_HASHTAB_LEN];
 193         struct list_head entry;
 194         u32 nr_callbacks;   /* #events assigned to cpu by scaling code */
 195         atomic_t nr_events; /* #events seen */
 196         wait_queue_head_t wait_completion;
 197         spinlock_t task_lock;
 198         u32 ownpid;
 199         /* mmap counter for resources mapped into user space */
 200         u32 mm_count_queue;
 201         u32 mm_count_galpa;
 202 };
 203
 204 enum ehca_mr_flag {
 205         EHCA_MR_FLAG_FMR = 0x80000000,   /* FMR, created with ehca_alloc_fmr */
 206         EHCA_MR_FLAG_MAXMR = 0x40000000, /* max-MR                           */
 207 };
 208
 209 struct ehca_mr {
 210         union {
 211                 struct ib_mr ib_mr;     /* must always be first in ehca_mr */
 212                 struct ib_fmr ib_fmr;   /* must always be first in ehca_mr */
 213         } ib;
 214         struct ib_umem *umem;
 215         spinlock_t mrlock;
 216
 217         enum ehca_mr_flag flags;
 218         u32 num_kpages;         /* number of kernel pages */
 219         u32 num_hwpages;        /* number of hw pages to form MR */
 220         u64 hwpage_size;        /* hw page size used for this MR */
 221         int acl;                /* ACL (stored here for usage in reregister) */
 222         u64 *start;             /* virtual start address (stored here for */
 223                                 /* usage in reregister) */
 224         u64 size;               /* size (stored here for usage in reregister) */
 225         u32 fmr_page_size;      /* page size for FMR */
 226         u32 fmr_max_pages;      /* max pages for FMR */
 227         u32 fmr_max_maps;       /* max outstanding maps for FMR */
 228         u32 fmr_map_cnt;        /* map counter for FMR */
 229         /* fw specific data */
 230         struct ipz_mrmw_handle ipz_mr_handle;   /* MR handle for h-calls */
 231         struct h_galpas galpas;
 232 };
 233
 234 struct ehca_mw {
 235         struct ib_mw ib_mw;     /* gen2 mw, must always be first in ehca_mw */
 236         spinlock_t mwlock;
 237
 238         u8 never_bound;         /* indication MW was never bound */
 239         struct ipz_mrmw_handle ipz_mw_handle;   /* MW handle for h-calls */
 240         struct h_galpas galpas;
 241 };
 242
 243 enum ehca_mr_pgi_type {
 244         EHCA_MR_PGI_PHYS   = 1,  /* type of ehca_reg_phys_mr,
 245                                   * ehca_rereg_phys_mr,
 246                                   * ehca_reg_internal_maxmr */
 247         EHCA_MR_PGI_USER   = 2,  /* type of ehca_reg_user_mr */
 248         EHCA_MR_PGI_FMR    = 3   /* type of ehca_map_phys_fmr */
 249 };
 250
 251 struct ehca_mr_pginfo {
 252         enum ehca_mr_pgi_type type;
 253         u64 num_kpages;
 254         u64 kpage_cnt;
 255         u64 hwpage_size;     /* hw page size used for this MR */
 256         u64 num_hwpages;     /* number of hw pages */
 257         u64 hwpage_cnt;      /* counter for hw pages */
 258         u64 next_hwpage;     /* next hw page in buffer/chunk/listelem */
 259
 260         union {
 261                 struct { /* type EHCA_MR_PGI_PHYS section */
 262                         int num_phys_buf;
 263                         struct ib_phys_buf *phys_buf_array;
 264                         u64 next_buf;
 265                 } phy;
 266                 struct { /* type EHCA_MR_PGI_USER section */
 267                         struct ib_umem *region;
 268                         struct ib_umem_chunk *next_chunk;
 269                         u64 next_nmap;
 270                 } usr;
 271                 struct { /* type EHCA_MR_PGI_FMR section */
 272                         u64 fmr_pgsize;
 273                         u64 *page_list;
 274                         u64 next_listelem;
 275                 } fmr;
 276         } u;
 277 };
 278
 279 /* output parameters for MR/FMR hipz calls */
 280 struct ehca_mr_hipzout_parms {
 281         struct ipz_mrmw_handle handle;
 282         u32 lkey;
 283         u32 rkey;
 284         u64 len;
 285         u64 vaddr;
 286         u32 acl;
 287 };
 288
 289 /* output parameters for MW hipz calls */
 290 struct ehca_mw_hipzout_parms {
 291         struct ipz_mrmw_handle handle;
 292         u32 rkey;
 293 };
 294
 295 struct ehca_av {
 296         struct ib_ah ib_ah;
 297         struct ehca_ud_av av;
 298 };
 299
 300 struct ehca_ucontext {
 301         struct ib_ucontext ib_ucontext;
 302 };
 303
 304 int ehca_init_pd_cache(void);
 305 void ehca_cleanup_pd_cache(void);
 306 int ehca_init_cq_cache(void);
 307 void ehca_cleanup_cq_cache(void);
 308 int ehca_init_qp_cache(void);
 309 void ehca_cleanup_qp_cache(void);
 310 int ehca_init_av_cache(void);
 311 void ehca_cleanup_av_cache(void);
 312 int ehca_init_mrmw_cache(void);
 313 void ehca_cleanup_mrmw_cache(void);
 314 int ehca_init_small_qp_cache(void);
 315 void ehca_cleanup_small_qp_cache(void);
 316
 317 extern rwlock_t ehca_qp_idr_lock;
 318 extern rwlock_t ehca_cq_idr_lock;
 319 extern struct idr ehca_qp_idr;
 320 extern struct idr ehca_cq_idr;
 321
 322 extern int ehca_static_rate;
 323 extern int ehca_port_act_time;
 324 extern int ehca_use_hp_mr;
 325 extern int ehca_scaling_code;
 326 extern int ehca_mr_largepage;
 327
 328 struct ipzu_queue_resp {
 329         u32 qe_size;      /* queue entry size */
 330         u32 act_nr_of_sg;
 331         u32 queue_length; /* queue length allocated in bytes */
 332         u32 pagesize;
 333         u32 toggle_state;
 334         u32 offset; /* save offset within a page for small_qp */
 335 };
 336
 337 struct ehca_create_cq_resp {
 338         u32 cq_number;
 339         u32 token;
 340         struct ipzu_queue_resp ipz_queue;
 341         u32 fw_handle_ofs;
 342         u32 dummy;
 343 };
 344
 345 struct ehca_create_qp_resp {
 346         u32 qp_num;
 347         u32 token;
 348         u32 qp_type;
 349         u32 ext_type;
 350         u32 qkey;
 351         /* qp_num assigned by ehca: sqp0/1 may have got different numbers */
 352         u32 real_qp_num;
 353         u32 fw_handle_ofs;
 354         u32 dummy;
 355         struct ipzu_queue_resp ipz_squeue;
 356         struct ipzu_queue_resp ipz_rqueue;
 357 };
 358
 359 struct ehca_alloc_cq_parms {
 360         u32 nr_cqe;
 361         u32 act_nr_of_entries;
 362         u32 act_pages;
 363         struct ipz_eq_handle eq_handle;
 364 };
 365
 366 enum ehca_service_type {
 367         ST_RC  = 0,
 368         ST_UC  = 1,
 369         ST_RD  = 2,
 370         ST_UD  = 3,
 371 };
 372
 373 enum ehca_ll_comp_flags {
 374         LLQP_SEND_COMP = 0x20,
 375         LLQP_RECV_COMP = 0x40,
 376         LLQP_COMP_MASK = 0x60,
 377 };
 378
 379 struct ehca_alloc_queue_parms {
 380         /* input parameters */
 381         int max_wr;
 382         int max_sge;
 383         int page_size;
 384         int is_small;
 385
 386         /* output parameters */
 387         u16 act_nr_wqes;
 388         u8  act_nr_sges;
 389         u32 queue_size; /* bytes for small queues, pages otherwise */
 390 };
 391
 392 struct ehca_alloc_qp_parms {
 393         struct ehca_alloc_queue_parms squeue;
 394         struct ehca_alloc_queue_parms rqueue;
 395
 396         /* input parameters */
 397         enum ehca_service_type servicetype;
 398         int qp_storage;
 399         int sigtype;
 400         enum ehca_ext_qp_type ext_type;
 401         enum ehca_ll_comp_flags ll_comp_flags;
 402         int ud_av_l_key_ctl;
 403
 404         u32 token;
 405         struct ipz_eq_handle eq_handle;
 406         struct ipz_pd pd;
 407         struct ipz_cq_handle send_cq_handle, recv_cq_handle;
 408
 409         u32 srq_qpn, srq_token, srq_limit;
 410
 411         /* output parameters */
 412         u32 real_qp_num;
 413         struct ipz_qp_handle qp_handle;
 414         struct h_galpas galpas;
 415 };
 416
 417 int ehca_cq_assign_qp(struct ehca_cq *cq, struct ehca_qp *qp);
 418 int ehca_cq_unassign_qp(struct ehca_cq *cq, unsigned int qp_num);
 419 struct ehca_qp *ehca_cq_get_qp(struct ehca_cq *cq, int qp_num);
 420
 421 #endif