drivers/staging/rdma/hfi1/verbs.c

   1 /*
   2  * Copyright(c) 2015, 2016 Intel Corporation.
   3  *
   4  * This file is provided under a dual BSD/GPLv2 license.  When using or
   5  * redistributing this file, you may do so under either license.
   6  *
   7  * GPL LICENSE SUMMARY
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of version 2 of the GNU General Public License as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * BSD LICENSE
  19  *
  20  * Redistribution and use in source and binary forms, with or without
  21  * modification, are permitted provided that the following conditions
  22  * are met:
  23  *
  24  *  - Redistributions of source code must retain the above copyright
  25  *    notice, this list of conditions and the following disclaimer.
  26  *  - Redistributions in binary form must reproduce the above copyright
  27  *    notice, this list of conditions and the following disclaimer in
  28  *    the documentation and/or other materials provided with the
  29  *    distribution.
  30  *  - Neither the name of Intel Corporation nor the names of its
  31  *    contributors may be used to endorse or promote products derived
  32  *    from this software without specific prior written permission.
  33  *
  34  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  35  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  36  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  37  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  38  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  39  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  40  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  41  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  42  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  43  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  44  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  45  *
  46  */
  47
  48 #include <rdma/ib_mad.h>
  49 #include <rdma/ib_user_verbs.h>
  50 #include <linux/io.h>
  51 #include <linux/module.h>
  52 #include <linux/utsname.h>
  53 #include <linux/rculist.h>
  54 #include <linux/mm.h>
  55 #include <linux/random.h>
  56 #include <linux/vmalloc.h>
  57
  58 #include "hfi.h"
  59 #include "common.h"
  60 #include "device.h"
  61 #include "trace.h"
  62 #include "qp.h"
  63 #include "verbs_txreq.h"
  64
  65 static unsigned int hfi1_lkey_table_size = 16;
  66 module_param_named(lkey_table_size, hfi1_lkey_table_size, uint,
  67                    S_IRUGO);
  68 MODULE_PARM_DESC(lkey_table_size,
  69                  "LKEY table size in bits (2^n, 1 <= n <= 23)");
  70
  71 static unsigned int hfi1_max_pds = 0xFFFF;
  72 module_param_named(max_pds, hfi1_max_pds, uint, S_IRUGO);
  73 MODULE_PARM_DESC(max_pds,
  74                  "Maximum number of protection domains to support");
  75
  76 static unsigned int hfi1_max_ahs = 0xFFFF;
  77 module_param_named(max_ahs, hfi1_max_ahs, uint, S_IRUGO);
  78 MODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support");
  79
  80 unsigned int hfi1_max_cqes = 0x2FFFF;
  81 module_param_named(max_cqes, hfi1_max_cqes, uint, S_IRUGO);
  82 MODULE_PARM_DESC(max_cqes,
  83                  "Maximum number of completion queue entries to support");
  84
  85 unsigned int hfi1_max_cqs = 0x1FFFF;
  86 module_param_named(max_cqs, hfi1_max_cqs, uint, S_IRUGO);
  87 MODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support");
  88
  89 unsigned int hfi1_max_qp_wrs = 0x3FFF;
  90 module_param_named(max_qp_wrs, hfi1_max_qp_wrs, uint, S_IRUGO);
  91 MODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support");
  92
  93 unsigned int hfi1_max_qps = 16384;
  94 module_param_named(max_qps, hfi1_max_qps, uint, S_IRUGO);
  95 MODULE_PARM_DESC(max_qps, "Maximum number of QPs to support");
  96
  97 unsigned int hfi1_max_sges = 0x60;
  98 module_param_named(max_sges, hfi1_max_sges, uint, S_IRUGO);
  99 MODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support");
 100
 101 unsigned int hfi1_max_mcast_grps = 16384;
 102 module_param_named(max_mcast_grps, hfi1_max_mcast_grps, uint, S_IRUGO);
 103 MODULE_PARM_DESC(max_mcast_grps,
 104                  "Maximum number of multicast groups to support");
 105
 106 unsigned int hfi1_max_mcast_qp_attached = 16;
 107 module_param_named(max_mcast_qp_attached, hfi1_max_mcast_qp_attached,
 108                    uint, S_IRUGO);
 109 MODULE_PARM_DESC(max_mcast_qp_attached,
 110                  "Maximum number of attached QPs to support");
 111
 112 unsigned int hfi1_max_srqs = 1024;
 113 module_param_named(max_srqs, hfi1_max_srqs, uint, S_IRUGO);
 114 MODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support");
 115
 116 unsigned int hfi1_max_srq_sges = 128;
 117 module_param_named(max_srq_sges, hfi1_max_srq_sges, uint, S_IRUGO);
 118 MODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support");
 119
 120 unsigned int hfi1_max_srq_wrs = 0x1FFFF;
 121 module_param_named(max_srq_wrs, hfi1_max_srq_wrs, uint, S_IRUGO);
 122 MODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support");
 123
 124 unsigned short piothreshold;
 125 module_param(piothreshold, ushort, S_IRUGO);
 126 MODULE_PARM_DESC(piothreshold, "size used to determine sdma vs. pio");
 127
 128 #define COPY_CACHELESS 1
 129 #define COPY_ADAPTIVE  2
 130 static unsigned int sge_copy_mode;
 131 module_param(sge_copy_mode, uint, S_IRUGO);
 132 MODULE_PARM_DESC(sge_copy_mode,
 133                  "Verbs copy mode: 0 use memcpy, 1 use cacheless copy, 2 adapt based on WSS");
 134
 135 static void verbs_sdma_complete(
 136         struct sdma_txreq *cookie,
 137         int status);
 138
 139 static int pio_wait(struct rvt_qp *qp,
 140                     struct send_context *sc,
 141                     struct hfi1_pkt_state *ps,
 142                     u32 flag);
 143
 144 /* Length of buffer to create verbs txreq cache name */
 145 #define TXREQ_NAME_LEN 24
 146
 147 static uint wss_threshold;
 148 module_param(wss_threshold, uint, S_IRUGO);
 149 MODULE_PARM_DESC(wss_threshold, "Percentage (1-100) of LLC to use as a threshold for a cacheless copy");
 150 static uint wss_clean_period = 256;
 151 module_param(wss_clean_period, uint, S_IRUGO);
 152 MODULE_PARM_DESC(wss_clean_period, "Count of verbs copies before an entry in the page copy table is cleaned");
 153
 154 /* memory working set size */
 155 struct hfi1_wss {
 156         unsigned long *entries;
 157         atomic_t total_count;
 158         atomic_t clean_counter;
 159         atomic_t clean_entry;
 160
 161         int threshold;
 162         int num_entries;
 163         long pages_mask;
 164 };
 165
 166 static struct hfi1_wss wss;
 167
 168 int hfi1_wss_init(void)
 169 {
 170         long llc_size;
 171         long llc_bits;
 172         long table_size;
 173         long table_bits;
 174
 175         /* check for a valid percent range - default to 80 if none or invalid */
 176         if (wss_threshold < 1 || wss_threshold > 100)
 177                 wss_threshold = 80;
 178         /* reject a wildly large period */
 179         if (wss_clean_period > 1000000)
 180                 wss_clean_period = 256;
 181         /* reject a zero period */
 182         if (wss_clean_period == 0)
 183                 wss_clean_period = 1;
 184
 185         /*
 186          * Calculate the table size - the next power of 2 larger than the
 187          * LLC size.  LLC size is in KiB.
 188          */
 189         llc_size = wss_llc_size() * 1024;
 190         table_size = roundup_pow_of_two(llc_size);
 191
 192         /* one bit per page in rounded up table */
 193         llc_bits = llc_size / PAGE_SIZE;
 194         table_bits = table_size / PAGE_SIZE;
 195         wss.pages_mask = table_bits - 1;
 196         wss.num_entries = table_bits / BITS_PER_LONG;
 197
 198         wss.threshold = (llc_bits * wss_threshold) / 100;
 199         if (wss.threshold == 0)
 200                 wss.threshold = 1;
 201
 202         atomic_set(&wss.clean_counter, wss_clean_period);
 203
 204         wss.entries = kcalloc(wss.num_entries, sizeof(*wss.entries),
 205                               GFP_KERNEL);
 206         if (!wss.entries) {
 207                 hfi1_wss_exit();
 208                 return -ENOMEM;
 209         }
 210
 211         return 0;
 212 }
 213
 214 void hfi1_wss_exit(void)
 215 {
 216         /* coded to handle partially initialized and repeat callers */
 217         kfree(wss.entries);
 218         wss.entries = NULL;
 219 }
 220
 221 /*
 222  * Advance the clean counter.  When the clean period has expired,
 223  * clean an entry.
 224  *
 225  * This is implemented in atomics to avoid locking.  Because multiple
 226  * variables are involved, it can be racy which can lead to slightly
 227  * inaccurate information.  Since this is only a heuristic, this is
 228  * OK.  Any innaccuracies will clean themselves out as the counter
 229  * advances.  That said, it is unlikely the entry clean operation will
 230  * race - the next possible racer will not start until the next clean
 231  * period.
 232  *
 233  * The clean counter is implemented as a decrement to zero.  When zero
 234  * is reached an entry is cleaned.
 235  */
 236 static void wss_advance_clean_counter(void)
 237 {
 238         int entry;
 239         int weight;
 240         unsigned long bits;
 241
 242         /* become the cleaner if we decrement the counter to zero */
 243         if (atomic_dec_and_test(&wss.clean_counter)) {
 244                 /*
 245                  * Set, not add, the clean period.  This avoids an issue
 246                  * where the counter could decrement below the clean period.
 247                  * Doing a set can result in lost decrements, slowing the
 248                  * clean advance.  Since this a heuristic, this possible
 249                  * slowdown is OK.
 250                  *
 251                  * An alternative is to loop, advancing the counter by a
 252                  * clean period until the result is > 0. However, this could
 253                  * lead to several threads keeping another in the clean loop.
 254                  * This could be mitigated by limiting the number of times
 255                  * we stay in the loop.
 256                  */
 257                 atomic_set(&wss.clean_counter, wss_clean_period);
 258
 259                 /*
 260                  * Uniquely grab the entry to clean and move to next.
 261                  * The current entry is always the lower bits of
 262                  * wss.clean_entry.  The table size, wss.num_entries,
 263                  * is always a power-of-2.
 264                  */
 265                 entry = (atomic_inc_return(&wss.clean_entry) - 1)
 266                         & (wss.num_entries - 1);
 267
 268                 /* clear the entry and count the bits */
 269                 bits = xchg(&wss.entries[entry], 0);
 270                 weight = hweight64((u64)bits);
 271                 /* only adjust the contended total count if needed */
 272                 if (weight)
 273                         atomic_sub(weight, &wss.total_count);
 274         }
 275 }
 276
 277 /*
 278  * Insert the given address into the working set array.
 279  */
 280 static void wss_insert(void *address)
 281 {
 282         u32 page = ((unsigned long)address >> PAGE_SHIFT) & wss.pages_mask;
 283         u32 entry = page / BITS_PER_LONG; /* assumes this ends up a shift */
 284         u32 nr = page & (BITS_PER_LONG - 1);
 285
 286         if (!test_and_set_bit(nr, &wss.entries[entry]))
 287                 atomic_inc(&wss.total_count);
 288
 289         wss_advance_clean_counter();
 290 }
 291
 292 /*
 293  * Is the working set larger than the threshold?
 294  */
 295 static inline int wss_exceeds_threshold(void)
 296 {
 297         return atomic_read(&wss.total_count) >= wss.threshold;
 298 }
 299
 300 /*
 301  * Translate ib_wr_opcode into ib_wc_opcode.
 302  */
 303 const enum ib_wc_opcode ib_hfi1_wc_opcode[] = {
 304         [IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE,
 305         [IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE,
 306         [IB_WR_SEND] = IB_WC_SEND,
 307         [IB_WR_SEND_WITH_IMM] = IB_WC_SEND,
 308         [IB_WR_RDMA_READ] = IB_WC_RDMA_READ,
 309         [IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP,
 310         [IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD
 311 };
 312
 313 /*
 314  * Length of header by opcode, 0 --> not supported
 315  */
 316 const u8 hdr_len_by_opcode[256] = {
 317         /* RC */
 318         [IB_OPCODE_RC_SEND_FIRST]                     = 12 + 8,
 319         [IB_OPCODE_RC_SEND_MIDDLE]                    = 12 + 8,
 320         [IB_OPCODE_RC_SEND_LAST]                      = 12 + 8,
 321         [IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE]       = 12 + 8 + 4,
 322         [IB_OPCODE_RC_SEND_ONLY]                      = 12 + 8,
 323         [IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE]       = 12 + 8 + 4,
 324         [IB_OPCODE_RC_RDMA_WRITE_FIRST]               = 12 + 8 + 16,
 325         [IB_OPCODE_RC_RDMA_WRITE_MIDDLE]              = 12 + 8,
 326         [IB_OPCODE_RC_RDMA_WRITE_LAST]                = 12 + 8,
 327         [IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
 328         [IB_OPCODE_RC_RDMA_WRITE_ONLY]                = 12 + 8 + 16,
 329         [IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20,
 330         [IB_OPCODE_RC_RDMA_READ_REQUEST]              = 12 + 8 + 16,
 331         [IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST]       = 12 + 8 + 4,
 332         [IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE]      = 12 + 8,
 333         [IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST]        = 12 + 8 + 4,
 334         [IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY]        = 12 + 8 + 4,
 335         [IB_OPCODE_RC_ACKNOWLEDGE]                    = 12 + 8 + 4,
 336         [IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE]             = 12 + 8 + 4,
 337         [IB_OPCODE_RC_COMPARE_SWAP]                   = 12 + 8 + 28,
 338         [IB_OPCODE_RC_FETCH_ADD]                      = 12 + 8 + 28,
 339         /* UC */
 340         [IB_OPCODE_UC_SEND_FIRST]                     = 12 + 8,
 341         [IB_OPCODE_UC_SEND_MIDDLE]                    = 12 + 8,
 342         [IB_OPCODE_UC_SEND_LAST]                      = 12 + 8,
 343         [IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE]       = 12 + 8 + 4,
 344         [IB_OPCODE_UC_SEND_ONLY]                      = 12 + 8,
 345         [IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE]       = 12 + 8 + 4,
 346         [IB_OPCODE_UC_RDMA_WRITE_FIRST]               = 12 + 8 + 16,
 347         [IB_OPCODE_UC_RDMA_WRITE_MIDDLE]              = 12 + 8,
 348         [IB_OPCODE_UC_RDMA_WRITE_LAST]                = 12 + 8,
 349         [IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
 350         [IB_OPCODE_UC_RDMA_WRITE_ONLY]                = 12 + 8 + 16,
 351         [IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20,
 352         /* UD */
 353         [IB_OPCODE_UD_SEND_ONLY]                      = 12 + 8 + 8,
 354         [IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE]       = 12 + 8 + 12
 355 };
 356
 357 static const opcode_handler opcode_handler_tbl[256] = {
 358         /* RC */
 359         [IB_OPCODE_RC_SEND_FIRST]                     = &hfi1_rc_rcv,
 360         [IB_OPCODE_RC_SEND_MIDDLE]                    = &hfi1_rc_rcv,
 361         [IB_OPCODE_RC_SEND_LAST]                      = &hfi1_rc_rcv,
 362         [IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE]       = &hfi1_rc_rcv,
 363         [IB_OPCODE_RC_SEND_ONLY]                      = &hfi1_rc_rcv,
 364         [IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE]       = &hfi1_rc_rcv,
 365         [IB_OPCODE_RC_RDMA_WRITE_FIRST]               = &hfi1_rc_rcv,
 366         [IB_OPCODE_RC_RDMA_WRITE_MIDDLE]              = &hfi1_rc_rcv,
 367         [IB_OPCODE_RC_RDMA_WRITE_LAST]                = &hfi1_rc_rcv,
 368         [IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_rc_rcv,
 369         [IB_OPCODE_RC_RDMA_WRITE_ONLY]                = &hfi1_rc_rcv,
 370         [IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_rc_rcv,
 371         [IB_OPCODE_RC_RDMA_READ_REQUEST]              = &hfi1_rc_rcv,
 372         [IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST]       = &hfi1_rc_rcv,
 373         [IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE]      = &hfi1_rc_rcv,
 374         [IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST]        = &hfi1_rc_rcv,
 375         [IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY]        = &hfi1_rc_rcv,
 376         [IB_OPCODE_RC_ACKNOWLEDGE]                    = &hfi1_rc_rcv,
 377         [IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE]             = &hfi1_rc_rcv,
 378         [IB_OPCODE_RC_COMPARE_SWAP]                   = &hfi1_rc_rcv,
 379         [IB_OPCODE_RC_FETCH_ADD]                      = &hfi1_rc_rcv,
 380         /* UC */
 381         [IB_OPCODE_UC_SEND_FIRST]                     = &hfi1_uc_rcv,
 382         [IB_OPCODE_UC_SEND_MIDDLE]                    = &hfi1_uc_rcv,
 383         [IB_OPCODE_UC_SEND_LAST]                      = &hfi1_uc_rcv,
 384         [IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE]       = &hfi1_uc_rcv,
 385         [IB_OPCODE_UC_SEND_ONLY]                      = &hfi1_uc_rcv,
 386         [IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE]       = &hfi1_uc_rcv,
 387         [IB_OPCODE_UC_RDMA_WRITE_FIRST]               = &hfi1_uc_rcv,
 388         [IB_OPCODE_UC_RDMA_WRITE_MIDDLE]              = &hfi1_uc_rcv,
 389         [IB_OPCODE_UC_RDMA_WRITE_LAST]                = &hfi1_uc_rcv,
 390         [IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_uc_rcv,
 391         [IB_OPCODE_UC_RDMA_WRITE_ONLY]                = &hfi1_uc_rcv,
 392         [IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_uc_rcv,
 393         /* UD */
 394         [IB_OPCODE_UD_SEND_ONLY]                      = &hfi1_ud_rcv,
 395         [IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE]       = &hfi1_ud_rcv,
 396         /* CNP */
 397         [IB_OPCODE_CNP]                               = &hfi1_cnp_rcv
 398 };
 399
 400 /*
 401  * System image GUID.
 402  */
 403 __be64 ib_hfi1_sys_image_guid;
 404
 405 /**
 406  * hfi1_copy_sge - copy data to SGE memory
 407  * @ss: the SGE state
 408  * @data: the data to copy
 409  * @length: the length of the data
 410  * @copy_last: do a separate copy of the last 8 bytes
 411  */
 412 void hfi1_copy_sge(
 413         struct rvt_sge_state *ss,
 414         void *data, u32 length,
 415         int release,
 416         int copy_last)
 417 {
 418         struct rvt_sge *sge = &ss->sge;
 419         int in_last = 0;
 420         int i;
 421         int cacheless_copy = 0;
 422
 423         if (sge_copy_mode == COPY_CACHELESS) {
 424                 cacheless_copy = length >= PAGE_SIZE;
 425         } else if (sge_copy_mode == COPY_ADAPTIVE) {
 426                 if (length >= PAGE_SIZE) {
 427                         /*
 428                          * NOTE: this *assumes*:
 429                          * o The first vaddr is the dest.
 430                          * o If multiple pages, then vaddr is sequential.
 431                          */
 432                         wss_insert(sge->vaddr);
 433                         if (length >= (2 * PAGE_SIZE))
 434                                 wss_insert(sge->vaddr + PAGE_SIZE);
 435
 436                         cacheless_copy = wss_exceeds_threshold();
 437                 } else {
 438                         wss_advance_clean_counter();
 439                 }
 440         }
 441         if (copy_last) {
 442                 if (length > 8) {
 443                         length -= 8;
 444                 } else {
 445                         copy_last = 0;
 446                         in_last = 1;
 447                 }
 448         }
 449
 450 again:
 451         while (length) {
 452                 u32 len = sge->length;
 453
 454                 if (len > length)
 455                         len = length;
 456                 if (len > sge->sge_length)
 457                         len = sge->sge_length;
 458                 WARN_ON_ONCE(len == 0);
 459                 if (unlikely(in_last)) {
 460                         /* enforce byte transfer ordering */
 461                         for (i = 0; i < len; i++)
 462                                 ((u8 *)sge->vaddr)[i] = ((u8 *)data)[i];
 463                 } else if (cacheless_copy) {
 464                         cacheless_memcpy(sge->vaddr, data, len);
 465                 } else {
 466                         memcpy(sge->vaddr, data, len);
 467                 }
 468                 sge->vaddr += len;
 469                 sge->length -= len;
 470                 sge->sge_length -= len;
 471                 if (sge->sge_length == 0) {
 472                         if (release)
 473                                 rvt_put_mr(sge->mr);
 474                         if (--ss->num_sge)
 475                                 *sge = *ss->sg_list++;
 476                 } else if (sge->length == 0 && sge->mr->lkey) {
 477                         if (++sge->n >= RVT_SEGSZ) {
 478                                 if (++sge->m >= sge->mr->mapsz)
 479                                         break;
 480                                 sge->n = 0;
 481                         }
 482                         sge->vaddr =
 483                                 sge->mr->map[sge->m]->segs[sge->n].vaddr;
 484                         sge->length =
 485                                 sge->mr->map[sge->m]->segs[sge->n].length;
 486                 }
 487                 data += len;
 488                 length -= len;
 489         }
 490
 491         if (copy_last) {
 492                 copy_last = 0;
 493                 in_last = 1;
 494                 length = 8;
 495                 goto again;
 496         }
 497 }
 498
 499 /**
 500  * hfi1_skip_sge - skip over SGE memory
 501  * @ss: the SGE state
 502  * @length: the number of bytes to skip
 503  */
 504 void hfi1_skip_sge(struct rvt_sge_state *ss, u32 length, int release)
 505 {
 506         struct rvt_sge *sge = &ss->sge;
 507
 508         while (length) {
 509                 u32 len = sge->length;
 510
 511                 if (len > length)
 512                         len = length;
 513                 if (len > sge->sge_length)
 514                         len = sge->sge_length;
 515                 WARN_ON_ONCE(len == 0);
 516                 sge->vaddr += len;
 517                 sge->length -= len;
 518                 sge->sge_length -= len;
 519                 if (sge->sge_length == 0) {
 520                         if (release)
 521                                 rvt_put_mr(sge->mr);
 522                         if (--ss->num_sge)
 523                                 *sge = *ss->sg_list++;
 524                 } else if (sge->length == 0 && sge->mr->lkey) {
 525                         if (++sge->n >= RVT_SEGSZ) {
 526                                 if (++sge->m >= sge->mr->mapsz)
 527                                         break;
 528                                 sge->n = 0;
 529                         }
 530                         sge->vaddr =
 531                                 sge->mr->map[sge->m]->segs[sge->n].vaddr;
 532                         sge->length =
 533                                 sge->mr->map[sge->m]->segs[sge->n].length;
 534                 }
 535                 length -= len;
 536         }
 537 }
 538
 539 /*
 540  * Make sure the QP is ready and able to accept the given opcode.
 541  */
 542 static inline int qp_ok(int opcode, struct hfi1_packet *packet)
 543 {
 544         struct hfi1_ibport *ibp;
 545
 546         if (!(ib_rvt_state_ops[packet->qp->state] & RVT_PROCESS_RECV_OK))
 547                 goto dropit;
 548         if (((opcode & OPCODE_QP_MASK) == packet->qp->allowed_ops) ||
 549             (opcode == IB_OPCODE_CNP))
 550                 return 1;
 551 dropit:
 552         ibp = &packet->rcd->ppd->ibport_data;
 553         ibp->rvp.n_pkt_drops++;
 554         return 0;
 555 }
 556
 557 /**
 558  * hfi1_ib_rcv - process an incoming packet
 559  * @packet: data packet information
 560  *
 561  * This is called to process an incoming packet at interrupt level.
 562  *
 563  * Tlen is the length of the header + data + CRC in bytes.
 564  */
 565 void hfi1_ib_rcv(struct hfi1_packet *packet)
 566 {
 567         struct hfi1_ctxtdata *rcd = packet->rcd;
 568         struct hfi1_ib_header *hdr = packet->hdr;
 569         u32 tlen = packet->tlen;
 570         struct hfi1_pportdata *ppd = rcd->ppd;
 571         struct hfi1_ibport *ibp = &ppd->ibport_data;
 572         struct rvt_dev_info *rdi = &ppd->dd->verbs_dev.rdi;
 573         unsigned long flags;
 574         u32 qp_num;
 575         int lnh;
 576         u8 opcode;
 577         u16 lid;
 578
 579         /* Check for GRH */
 580         lnh = be16_to_cpu(hdr->lrh[0]) & 3;
 581         if (lnh == HFI1_LRH_BTH) {
 582                 packet->ohdr = &hdr->u.oth;
 583         } else if (lnh == HFI1_LRH_GRH) {
 584                 u32 vtf;
 585
 586                 packet->ohdr = &hdr->u.l.oth;
 587                 if (hdr->u.l.grh.next_hdr != IB_GRH_NEXT_HDR)
 588                         goto drop;
 589                 vtf = be32_to_cpu(hdr->u.l.grh.version_tclass_flow);
 590                 if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
 591                         goto drop;
 592                 packet->rcv_flags |= HFI1_HAS_GRH;
 593         } else {
 594                 goto drop;
 595         }
 596
 597         trace_input_ibhdr(rcd->dd, hdr);
 598
 599         opcode = (be32_to_cpu(packet->ohdr->bth[0]) >> 24);
 600         inc_opstats(tlen, &rcd->opstats->stats[opcode]);
 601
 602         /* Get the destination QP number. */
 603         qp_num = be32_to_cpu(packet->ohdr->bth[1]) & RVT_QPN_MASK;
 604         lid = be16_to_cpu(hdr->lrh[1]);
 605         if (unlikely((lid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
 606                      (lid != be16_to_cpu(IB_LID_PERMISSIVE)))) {
 607                 struct rvt_mcast *mcast;
 608                 struct rvt_mcast_qp *p;
 609
 610                 if (lnh != HFI1_LRH_GRH)
 611                         goto drop;
 612                 mcast = rvt_mcast_find(&ibp->rvp, &hdr->u.l.grh.dgid);
 613                 if (!mcast)
 614                         goto drop;
 615                 list_for_each_entry_rcu(p, &mcast->qp_list, list) {
 616                         packet->qp = p->qp;
 617                         spin_lock_irqsave(&packet->qp->r_lock, flags);
 618                         if (likely((qp_ok(opcode, packet))))
 619                                 opcode_handler_tbl[opcode](packet);
 620                         spin_unlock_irqrestore(&packet->qp->r_lock, flags);
 621                 }
 622                 /*
 623                  * Notify rvt_multicast_detach() if it is waiting for us
 624                  * to finish.
 625                  */
 626                 if (atomic_dec_return(&mcast->refcount) <= 1)
 627                         wake_up(&mcast->wait);
 628         } else {
 629                 rcu_read_lock();
 630                 packet->qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
 631                 if (!packet->qp) {
 632                         rcu_read_unlock();
 633                         goto drop;
 634                 }
 635                 spin_lock_irqsave(&packet->qp->r_lock, flags);
 636                 if (likely((qp_ok(opcode, packet))))
 637                         opcode_handler_tbl[opcode](packet);
 638                 spin_unlock_irqrestore(&packet->qp->r_lock, flags);
 639                 rcu_read_unlock();
 640         }
 641         return;
 642
 643 drop:
 644         ibp->rvp.n_pkt_drops++;
 645 }
 646
 647 /*
 648  * This is called from a timer to check for QPs
 649  * which need kernel memory in order to send a packet.
 650  */
 651 static void mem_timer(unsigned long data)
 652 {
 653         struct hfi1_ibdev *dev = (struct hfi1_ibdev *)data;
 654         struct list_head *list = &dev->memwait;
 655         struct rvt_qp *qp = NULL;
 656         struct iowait *wait;
 657         unsigned long flags;
 658         struct hfi1_qp_priv *priv;
 659
 660         write_seqlock_irqsave(&dev->iowait_lock, flags);
 661         if (!list_empty(list)) {
 662                 wait = list_first_entry(list, struct iowait, list);
 663                 qp = iowait_to_qp(wait);
 664                 priv = qp->priv;
 665                 list_del_init(&priv->s_iowait.list);
 666                 /* refcount held until actual wake up */
 667                 if (!list_empty(list))
 668                         mod_timer(&dev->mem_timer, jiffies + 1);
 669         }
 670         write_sequnlock_irqrestore(&dev->iowait_lock, flags);
 671
 672         if (qp)
 673                 hfi1_qp_wakeup(qp, RVT_S_WAIT_KMEM);
 674 }
 675
 676 void update_sge(struct rvt_sge_state *ss, u32 length)
 677 {
 678         struct rvt_sge *sge = &ss->sge;
 679
 680         sge->vaddr += length;
 681         sge->length -= length;
 682         sge->sge_length -= length;
 683         if (sge->sge_length == 0) {
 684                 if (--ss->num_sge)
 685                         *sge = *ss->sg_list++;
 686         } else if (sge->length == 0 && sge->mr->lkey) {
 687                 if (++sge->n >= RVT_SEGSZ) {
 688                         if (++sge->m >= sge->mr->mapsz)
 689                                 return;
 690                         sge->n = 0;
 691                 }
 692                 sge->vaddr = sge->mr->map[sge->m]->segs[sge->n].vaddr;
 693                 sge->length = sge->mr->map[sge->m]->segs[sge->n].length;
 694         }
 695 }
 696
 697 /*
 698  * This is called with progress side lock held.
 699  */
 700 /* New API */
 701 static void verbs_sdma_complete(
 702         struct sdma_txreq *cookie,
 703         int status)
 704 {
 705         struct verbs_txreq *tx =
 706                 container_of(cookie, struct verbs_txreq, txreq);
 707         struct rvt_qp *qp = tx->qp;
 708
 709         spin_lock(&qp->s_lock);
 710         if (tx->wqe) {
 711                 hfi1_send_complete(qp, tx->wqe, IB_WC_SUCCESS);
 712         } else if (qp->ibqp.qp_type == IB_QPT_RC) {
 713                 struct hfi1_ib_header *hdr;
 714
 715                 hdr = &tx->phdr.hdr;
 716                 hfi1_rc_send_complete(qp, hdr);
 717         }
 718         spin_unlock(&qp->s_lock);
 719
 720         hfi1_put_txreq(tx);
 721 }
 722
 723 static int wait_kmem(struct hfi1_ibdev *dev,
 724                      struct rvt_qp *qp,
 725                      struct hfi1_pkt_state *ps)
 726 {
 727         struct hfi1_qp_priv *priv = qp->priv;
 728         unsigned long flags;
 729         int ret = 0;
 730
 731         spin_lock_irqsave(&qp->s_lock, flags);
 732         if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
 733                 write_seqlock(&dev->iowait_lock);
 734                 list_add_tail(&ps->s_txreq->txreq.list,
 735                               &priv->s_iowait.tx_head);
 736                 if (list_empty(&priv->s_iowait.list)) {
 737                         if (list_empty(&dev->memwait))
 738                                 mod_timer(&dev->mem_timer, jiffies + 1);
 739                         qp->s_flags |= RVT_S_WAIT_KMEM;
 740                         list_add_tail(&priv->s_iowait.list, &dev->memwait);
 741                         trace_hfi1_qpsleep(qp, RVT_S_WAIT_KMEM);
 742                         atomic_inc(&qp->refcount);
 743                 }
 744                 write_sequnlock(&dev->iowait_lock);
 745                 qp->s_flags &= ~RVT_S_BUSY;
 746                 ret = -EBUSY;
 747         }
 748         spin_unlock_irqrestore(&qp->s_lock, flags);
 749
 750         return ret;
 751 }
 752
 753 /*
 754  * This routine calls txadds for each sg entry.
 755  *
 756  * Add failures will revert the sge cursor
 757  */
 758 static noinline int build_verbs_ulp_payload(
 759         struct sdma_engine *sde,
 760         struct rvt_sge_state *ss,
 761         u32 length,
 762         struct verbs_txreq *tx)
 763 {
 764         struct rvt_sge *sg_list = ss->sg_list;
 765         struct rvt_sge sge = ss->sge;
 766         u8 num_sge = ss->num_sge;
 767         u32 len;
 768         int ret = 0;
 769
 770         while (length) {
 771                 len = ss->sge.length;
 772                 if (len > length)
 773                         len = length;
 774                 if (len > ss->sge.sge_length)
 775                         len = ss->sge.sge_length;
 776                 WARN_ON_ONCE(len == 0);
 777                 ret = sdma_txadd_kvaddr(
 778                         sde->dd,
 779                         &tx->txreq,
 780                         ss->sge.vaddr,
 781                         len);
 782                 if (ret)
 783                         goto bail_txadd;
 784                 update_sge(ss, len);
 785                 length -= len;
 786         }
 787         return ret;
 788 bail_txadd:
 789         /* unwind cursor */
 790         ss->sge = sge;
 791         ss->num_sge = num_sge;
 792         ss->sg_list = sg_list;
 793         return ret;
 794 }
 795
 796 /*
 797  * Build the number of DMA descriptors needed to send length bytes of data.
 798  *
 799  * NOTE: DMA mapping is held in the tx until completed in the ring or
 800  *       the tx desc is freed without having been submitted to the ring
 801  *
 802  * This routine ensures all the helper routine calls succeed.
 803  */
 804 /* New API */
 805 static int build_verbs_tx_desc(
 806         struct sdma_engine *sde,
 807         struct rvt_sge_state *ss,
 808         u32 length,
 809         struct verbs_txreq *tx,
 810         struct ahg_ib_header *ahdr,
 811         u64 pbc)
 812 {
 813         int ret = 0;
 814         struct hfi1_pio_header *phdr = &tx->phdr;
 815         u16 hdrbytes = tx->hdr_dwords << 2;
 816
 817         if (!ahdr->ahgcount) {
 818                 ret = sdma_txinit_ahg(
 819                         &tx->txreq,
 820                         ahdr->tx_flags,
 821                         hdrbytes + length,
 822                         ahdr->ahgidx,
 823                         0,
 824                         NULL,
 825                         0,
 826                         verbs_sdma_complete);
 827                 if (ret)
 828                         goto bail_txadd;
 829                 phdr->pbc = cpu_to_le64(pbc);
 830                 ret = sdma_txadd_kvaddr(
 831                         sde->dd,
 832                         &tx->txreq,
 833                         phdr,
 834                         hdrbytes);
 835                 if (ret)
 836                         goto bail_txadd;
 837         } else {
 838                 ret = sdma_txinit_ahg(
 839                         &tx->txreq,
 840                         ahdr->tx_flags,
 841                         length,
 842                         ahdr->ahgidx,
 843                         ahdr->ahgcount,
 844                         ahdr->ahgdesc,
 845                         hdrbytes,
 846                         verbs_sdma_complete);
 847                 if (ret)
 848                         goto bail_txadd;
 849         }
 850
 851         /* add the ulp payload - if any.  ss can be NULL for acks */
 852         if (ss)
 853                 ret = build_verbs_ulp_payload(sde, ss, length, tx);
 854 bail_txadd:
 855         return ret;
 856 }
 857
 858 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
 859                         u64 pbc)
 860 {
 861         struct hfi1_qp_priv *priv = qp->priv;
 862         struct ahg_ib_header *ahdr = priv->s_hdr;
 863         u32 hdrwords = qp->s_hdrwords;
 864         struct rvt_sge_state *ss = qp->s_cur_sge;
 865         u32 len = qp->s_cur_size;
 866         u32 plen = hdrwords + ((len + 3) >> 2) + 2; /* includes pbc */
 867         struct hfi1_ibdev *dev = ps->dev;
 868         struct hfi1_pportdata *ppd = ps->ppd;
 869         struct verbs_txreq *tx;
 870         u64 pbc_flags = 0;
 871         u8 sc5 = priv->s_sc;
 872
 873         int ret;
 874
 875         tx = ps->s_txreq;
 876         if (!sdma_txreq_built(&tx->txreq)) {
 877                 if (likely(pbc == 0)) {
 878                         u32 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5);
 879                         /* No vl15 here */
 880                         /* set PBC_DC_INFO bit (aka SC[4]) in pbc_flags */
 881                         pbc_flags |= (!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT;
 882
 883                         pbc = create_pbc(ppd,
 884                                          pbc_flags,
 885                                          qp->srate_mbps,
 886                                          vl,
 887                                          plen);
 888                 }
 889                 tx->wqe = qp->s_wqe;
 890                 ret = build_verbs_tx_desc(tx->sde, ss, len, tx, ahdr, pbc);
 891                 if (unlikely(ret))
 892                         goto bail_build;
 893         }
 894         ret =  sdma_send_txreq(tx->sde, &priv->s_iowait, &tx->txreq);
 895         if (unlikely(ret < 0)) {
 896                 if (ret == -ECOMM)
 897                         goto bail_ecomm;
 898                 return ret;
 899         }
 900         trace_sdma_output_ibhdr(dd_from_ibdev(qp->ibqp.device),
 901                                 &ps->s_txreq->phdr.hdr);
 902         return ret;
 903
 904 bail_ecomm:
 905         /* The current one got "sent" */
 906         return 0;
 907 bail_build:
 908         ret = wait_kmem(dev, qp, ps);
 909         if (!ret) {
 910                 /* free txreq - bad state */
 911                 hfi1_put_txreq(ps->s_txreq);
 912                 ps->s_txreq = NULL;
 913         }
 914         return ret;
 915 }
 916
 917 /*
 918  * If we are now in the error state, return zero to flush the
 919  * send work request.
 920  */
 921 static int pio_wait(struct rvt_qp *qp,
 922                     struct send_context *sc,
 923                     struct hfi1_pkt_state *ps,
 924                     u32 flag)
 925 {
 926         struct hfi1_qp_priv *priv = qp->priv;
 927         struct hfi1_devdata *dd = sc->dd;
 928         struct hfi1_ibdev *dev = &dd->verbs_dev;
 929         unsigned long flags;
 930         int ret = 0;
 931
 932         /*
 933          * Note that as soon as want_buffer() is called and
 934          * possibly before it returns, sc_piobufavail()
 935          * could be called. Therefore, put QP on the I/O wait list before
 936          * enabling the PIO avail interrupt.
 937          */
 938         spin_lock_irqsave(&qp->s_lock, flags);
 939         if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
 940                 write_seqlock(&dev->iowait_lock);
 941                 list_add_tail(&ps->s_txreq->txreq.list,
 942                               &priv->s_iowait.tx_head);
 943                 if (list_empty(&priv->s_iowait.list)) {
 944                         struct hfi1_ibdev *dev = &dd->verbs_dev;
 945                         int was_empty;
 946
 947                         dev->n_piowait += !!(flag & RVT_S_WAIT_PIO);
 948                         dev->n_piodrain += !!(flag & RVT_S_WAIT_PIO_DRAIN);
 949                         dev->n_piowait++;
 950                         qp->s_flags |= flag;
 951                         was_empty = list_empty(&sc->piowait);
 952                         list_add_tail(&priv->s_iowait.list, &sc->piowait);
 953                         trace_hfi1_qpsleep(qp, RVT_S_WAIT_PIO);
 954                         atomic_inc(&qp->refcount);
 955                         /* counting: only call wantpiobuf_intr if first user */
 956                         if (was_empty)
 957                                 hfi1_sc_wantpiobuf_intr(sc, 1);
 958                 }
 959                 write_sequnlock(&dev->iowait_lock);
 960                 qp->s_flags &= ~RVT_S_BUSY;
 961                 ret = -EBUSY;
 962         }
 963         spin_unlock_irqrestore(&qp->s_lock, flags);
 964         return ret;
 965 }
 966
 967 static void verbs_pio_complete(void *arg, int code)
 968 {
 969         struct rvt_qp *qp = (struct rvt_qp *)arg;
 970         struct hfi1_qp_priv *priv = qp->priv;
 971
 972         if (iowait_pio_dec(&priv->s_iowait))
 973                 iowait_drain_wakeup(&priv->s_iowait);
 974 }
 975
 976 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
 977                         u64 pbc)
 978 {
 979         struct hfi1_qp_priv *priv = qp->priv;
 980         u32 hdrwords = qp->s_hdrwords;
 981         struct rvt_sge_state *ss = qp->s_cur_sge;
 982         u32 len = qp->s_cur_size;
 983         u32 dwords = (len + 3) >> 2;
 984         u32 plen = hdrwords + dwords + 2; /* includes pbc */
 985         struct hfi1_pportdata *ppd = ps->ppd;
 986         u32 *hdr = (u32 *)&ps->s_txreq->phdr.hdr;
 987         u64 pbc_flags = 0;
 988         u8 sc5;
 989         unsigned long flags = 0;
 990         struct send_context *sc;
 991         struct pio_buf *pbuf;
 992         int wc_status = IB_WC_SUCCESS;
 993         int ret = 0;
 994         pio_release_cb cb = NULL;
 995
 996         /* only RC/UC use complete */
 997         switch (qp->ibqp.qp_type) {
 998         case IB_QPT_RC:
 999         case IB_QPT_UC:
1000                 cb = verbs_pio_complete;
1001                 break;
1002         default:
1003                 break;
1004         }
1005
1006         /* vl15 special case taken care of in ud.c */
1007         sc5 = priv->s_sc;
1008         sc = ps->s_txreq->psc;
1009
1010         if (likely(pbc == 0)) {
1011                 u8 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5);
1012                 /* set PBC_DC_INFO bit (aka SC[4]) in pbc_flags */
1013                 pbc_flags |= (!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT;
1014                 pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps, vl, plen);
1015         }
1016         if (cb)
1017                 iowait_pio_inc(&priv->s_iowait);
1018         pbuf = sc_buffer_alloc(sc, plen, cb, qp);
1019         if (unlikely(!pbuf)) {
1020                 if (cb)
1021                         verbs_pio_complete(qp, 0);
1022                 if (ppd->host_link_state != HLS_UP_ACTIVE) {
1023                         /*
1024                          * If we have filled the PIO buffers to capacity and are
1025                          * not in an active state this request is not going to
1026                          * go out to so just complete it with an error or else a
1027                          * ULP or the core may be stuck waiting.
1028                          */
1029                         hfi1_cdbg(
1030                                 PIO,
1031                                 "alloc failed. state not active, completing");
1032                         wc_status = IB_WC_GENERAL_ERR;
1033                         goto pio_bail;
1034                 } else {
1035                         /*
1036                          * This is a normal occurrence. The PIO buffs are full
1037                          * up but we are still happily sending, well we could be
1038                          * so lets continue to queue the request.
1039                          */
1040                         hfi1_cdbg(PIO, "alloc failed. state active, queuing");
1041                         ret = pio_wait(qp, sc, ps, RVT_S_WAIT_PIO);
1042                         if (!ret)
1043                                 /* txreq not queued - free */
1044                                 goto bail;
1045                         /* tx consumed in wait */
1046                         return ret;
1047                 }
1048         }
1049
1050         if (len == 0) {
1051                 pio_copy(ppd->dd, pbuf, pbc, hdr, hdrwords);
1052         } else {
1053                 if (ss) {
1054                         seg_pio_copy_start(pbuf, pbc, hdr, hdrwords * 4);
1055                         while (len) {
1056                                 void *addr = ss->sge.vaddr;
1057                                 u32 slen = ss->sge.length;
1058
1059                                 if (slen > len)
1060                                         slen = len;
1061                                 update_sge(ss, slen);
1062                                 seg_pio_copy_mid(pbuf, addr, slen);
1063                                 len -= slen;
1064                         }
1065                         seg_pio_copy_end(pbuf);
1066                 }
1067         }
1068
1069         trace_pio_output_ibhdr(dd_from_ibdev(qp->ibqp.device),
1070                                &ps->s_txreq->phdr.hdr);
1071
1072 pio_bail:
1073         if (qp->s_wqe) {
1074                 spin_lock_irqsave(&qp->s_lock, flags);
1075                 hfi1_send_complete(qp, qp->s_wqe, wc_status);
1076                 spin_unlock_irqrestore(&qp->s_lock, flags);
1077         } else if (qp->ibqp.qp_type == IB_QPT_RC) {
1078                 spin_lock_irqsave(&qp->s_lock, flags);
1079                 hfi1_rc_send_complete(qp, &ps->s_txreq->phdr.hdr);
1080                 spin_unlock_irqrestore(&qp->s_lock, flags);
1081         }
1082
1083         ret = 0;
1084
1085 bail:
1086         hfi1_put_txreq(ps->s_txreq);
1087         return ret;
1088 }
1089
1090 /*
1091  * egress_pkey_matches_entry - return 1 if the pkey matches ent (ent
1092  * being an entry from the ingress partition key table), return 0
1093  * otherwise. Use the matching criteria for egress partition keys
1094  * specified in the OPAv1 spec., section 9.1l.7.
1095  */
1096 static inline int egress_pkey_matches_entry(u16 pkey, u16 ent)
1097 {
1098         u16 mkey = pkey & PKEY_LOW_15_MASK;
1099         u16 ment = ent & PKEY_LOW_15_MASK;
1100
1101         if (mkey == ment) {
1102                 /*
1103                  * If pkey[15] is set (full partition member),
1104                  * is bit 15 in the corresponding table element
1105                  * clear (limited member)?
1106                  */
1107                 if (pkey & PKEY_MEMBER_MASK)
1108                         return !!(ent & PKEY_MEMBER_MASK);
1109                 return 1;
1110         }
1111         return 0;
1112 }
1113
1114 /*
1115  * egress_pkey_check - return 0 if hdr's pkey matches according to the
1116  * criteria in the OPAv1 spec., section 9.11.7.
1117  */
1118 static inline int egress_pkey_check(struct hfi1_pportdata *ppd,
1119                                     struct hfi1_ib_header *hdr,
1120                                     struct rvt_qp *qp)
1121 {
1122         struct hfi1_qp_priv *priv = qp->priv;
1123         struct hfi1_other_headers *ohdr;
1124         struct hfi1_devdata *dd;
1125         int i = 0;
1126         u16 pkey;
1127         u8 lnh, sc5 = priv->s_sc;
1128
1129         if (!(ppd->part_enforce & HFI1_PART_ENFORCE_OUT))
1130                 return 0;
1131
1132         /* locate the pkey within the headers */
1133         lnh = be16_to_cpu(hdr->lrh[0]) & 3;
1134         if (lnh == HFI1_LRH_GRH)
1135                 ohdr = &hdr->u.l.oth;
1136         else
1137                 ohdr = &hdr->u.oth;
1138
1139         pkey = (u16)be32_to_cpu(ohdr->bth[0]);
1140
1141         /* If SC15, pkey[0:14] must be 0x7fff */
1142         if ((sc5 == 0xf) && ((pkey & PKEY_LOW_15_MASK) != PKEY_LOW_15_MASK))
1143                 goto bad;
1144
1145         /* Is the pkey = 0x0, or 0x8000? */
1146         if ((pkey & PKEY_LOW_15_MASK) == 0)
1147                 goto bad;
1148
1149         /* The most likely matching pkey has index qp->s_pkey_index */
1150         if (unlikely(!egress_pkey_matches_entry(pkey,
1151                                                 ppd->pkeys
1152                                                 [qp->s_pkey_index]))) {
1153                 /* no match - try the entire table */
1154                 for (; i < MAX_PKEY_VALUES; i++) {
1155                         if (egress_pkey_matches_entry(pkey, ppd->pkeys[i]))
1156                                 break;
1157                 }
1158         }
1159
1160         if (i < MAX_PKEY_VALUES)
1161                 return 0;
1162 bad:
1163         incr_cntr64(&ppd->port_xmit_constraint_errors);
1164         dd = ppd->dd;
1165         if (!(dd->err_info_xmit_constraint.status & OPA_EI_STATUS_SMASK)) {
1166                 u16 slid = be16_to_cpu(hdr->lrh[3]);
1167
1168                 dd->err_info_xmit_constraint.status |= OPA_EI_STATUS_SMASK;
1169                 dd->err_info_xmit_constraint.slid = slid;
1170                 dd->err_info_xmit_constraint.pkey = pkey;
1171         }
1172         return 1;
1173 }
1174
1175 /**
1176  * get_send_routine - choose an egress routine
1177  *
1178  * Choose an egress routine based on QP type
1179  * and size
1180  */
1181 static inline send_routine get_send_routine(struct rvt_qp *qp,
1182                                             struct hfi1_ib_header *h)
1183 {
1184         struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
1185         struct hfi1_qp_priv *priv = qp->priv;
1186
1187         if (unlikely(!(dd->flags & HFI1_HAS_SEND_DMA)))
1188                 return dd->process_pio_send;
1189         switch (qp->ibqp.qp_type) {
1190         case IB_QPT_SMI:
1191                 return dd->process_pio_send;
1192         case IB_QPT_GSI:
1193         case IB_QPT_UD:
1194                 if (piothreshold && qp->s_cur_size <= piothreshold)
1195                         return dd->process_pio_send;
1196                 break;
1197         case IB_QPT_RC:
1198                 if (piothreshold &&
1199                     qp->s_cur_size <= min(piothreshold, qp->pmtu) &&
1200                     (BIT(get_opcode(h) & 0x1f) & rc_only_opcode) &&
1201                     iowait_sdma_pending(&priv->s_iowait) == 0)
1202                         return dd->process_pio_send;
1203                 break;
1204         case IB_QPT_UC:
1205                 if (piothreshold &&
1206                     qp->s_cur_size <= min(piothreshold, qp->pmtu) &&
1207                     (BIT(get_opcode(h) & 0x1f) & uc_only_opcode) &&
1208                     iowait_sdma_pending(&priv->s_iowait) == 0)
1209                         return dd->process_pio_send;
1210                 break;
1211         default:
1212                 break;
1213         }
1214         return dd->process_dma_send;
1215 }
1216
1217 /**
1218  * hfi1_verbs_send - send a packet
1219  * @qp: the QP to send on
1220  * @ps: the state of the packet to send
1221  *
1222  * Return zero if packet is sent or queued OK.
1223  * Return non-zero and clear qp->s_flags RVT_S_BUSY otherwise.
1224  */
1225 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
1226 {
1227         struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
1228         send_routine sr;
1229         int ret;
1230
1231         sr = get_send_routine(qp, &ps->s_txreq->phdr.hdr);
1232         ret = egress_pkey_check(dd->pport, &ps->s_txreq->phdr.hdr, qp);
1233         if (unlikely(ret)) {
1234                 /*
1235                  * The value we are returning here does not get propagated to
1236                  * the verbs caller. Thus we need to complete the request with
1237                  * error otherwise the caller could be sitting waiting on the
1238                  * completion event. Only do this for PIO. SDMA has its own
1239                  * mechanism for handling the errors. So for SDMA we can just
1240                  * return.
1241                  */
1242                 if (sr == dd->process_pio_send) {
1243                         unsigned long flags;
1244
1245                         hfi1_cdbg(PIO, "%s() Failed. Completing with err",
1246                                   __func__);
1247                         spin_lock_irqsave(&qp->s_lock, flags);
1248                         hfi1_send_complete(qp, qp->s_wqe, IB_WC_GENERAL_ERR);
1249                         spin_unlock_irqrestore(&qp->s_lock, flags);
1250                 }
1251                 return -EINVAL;
1252         }
1253         return sr(qp, ps, 0);
1254 }
1255
1256 /**
1257  * hfi1_fill_device_attr - Fill in rvt dev info device attributes.
1258  * @dd: the device data structure
1259  */
1260 static void hfi1_fill_device_attr(struct hfi1_devdata *dd)
1261 {
1262         struct rvt_dev_info *rdi = &dd->verbs_dev.rdi;
1263
1264         memset(&rdi->dparms.props, 0, sizeof(rdi->dparms.props));
1265
1266         rdi->dparms.props.device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR |
1267                         IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT |
1268                         IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_RC_RNR_NAK_GEN |
1269                         IB_DEVICE_PORT_ACTIVE_EVENT | IB_DEVICE_SRQ_RESIZE;
1270         rdi->dparms.props.page_size_cap = PAGE_SIZE;
1271         rdi->dparms.props.vendor_id = dd->oui1 << 16 | dd->oui2 << 8 | dd->oui3;
1272         rdi->dparms.props.vendor_part_id = dd->pcidev->device;
1273         rdi->dparms.props.hw_ver = dd->minrev;
1274         rdi->dparms.props.sys_image_guid = ib_hfi1_sys_image_guid;
1275         rdi->dparms.props.max_mr_size = ~0ULL;
1276         rdi->dparms.props.max_qp = hfi1_max_qps;
1277         rdi->dparms.props.max_qp_wr = hfi1_max_qp_wrs;
1278         rdi->dparms.props.max_sge = hfi1_max_sges;
1279         rdi->dparms.props.max_sge_rd = hfi1_max_sges;
1280         rdi->dparms.props.max_cq = hfi1_max_cqs;
1281         rdi->dparms.props.max_ah = hfi1_max_ahs;
1282         rdi->dparms.props.max_cqe = hfi1_max_cqes;
1283         rdi->dparms.props.max_mr = rdi->lkey_table.max;
1284         rdi->dparms.props.max_fmr = rdi->lkey_table.max;
1285         rdi->dparms.props.max_map_per_fmr = 32767;
1286         rdi->dparms.props.max_pd = hfi1_max_pds;
1287         rdi->dparms.props.max_qp_rd_atom = HFI1_MAX_RDMA_ATOMIC;
1288         rdi->dparms.props.max_qp_init_rd_atom = 255;
1289         rdi->dparms.props.max_srq = hfi1_max_srqs;
1290         rdi->dparms.props.max_srq_wr = hfi1_max_srq_wrs;
1291         rdi->dparms.props.max_srq_sge = hfi1_max_srq_sges;
1292         rdi->dparms.props.atomic_cap = IB_ATOMIC_GLOB;
1293         rdi->dparms.props.max_pkeys = hfi1_get_npkeys(dd);
1294         rdi->dparms.props.max_mcast_grp = hfi1_max_mcast_grps;
1295         rdi->dparms.props.max_mcast_qp_attach = hfi1_max_mcast_qp_attached;
1296         rdi->dparms.props.max_total_mcast_qp_attach =
1297                                         rdi->dparms.props.max_mcast_qp_attach *
1298                                         rdi->dparms.props.max_mcast_grp;
1299 }
1300
1301 static inline u16 opa_speed_to_ib(u16 in)
1302 {
1303         u16 out = 0;
1304
1305         if (in & OPA_LINK_SPEED_25G)
1306                 out |= IB_SPEED_EDR;
1307         if (in & OPA_LINK_SPEED_12_5G)
1308                 out |= IB_SPEED_FDR;
1309
1310         return out;
1311 }
1312
1313 /*
1314  * Convert a single OPA link width (no multiple flags) to an IB value.
1315  * A zero OPA link width means link down, which means the IB width value
1316  * is a don't care.
1317  */
1318 static inline u16 opa_width_to_ib(u16 in)
1319 {
1320         switch (in) {
1321         case OPA_LINK_WIDTH_1X:
1322         /* map 2x and 3x to 1x as they don't exist in IB */
1323         case OPA_LINK_WIDTH_2X:
1324         case OPA_LINK_WIDTH_3X:
1325                 return IB_WIDTH_1X;
1326         default: /* link down or unknown, return our largest width */
1327         case OPA_LINK_WIDTH_4X:
1328                 return IB_WIDTH_4X;
1329         }
1330 }
1331
1332 static int query_port(struct rvt_dev_info *rdi, u8 port_num,
1333                       struct ib_port_attr *props)
1334 {
1335         struct hfi1_ibdev *verbs_dev = dev_from_rdi(rdi);
1336         struct hfi1_devdata *dd = dd_from_dev(verbs_dev);
1337         struct hfi1_pportdata *ppd = &dd->pport[port_num - 1];
1338         u16 lid = ppd->lid;
1339
1340         props->lid = lid ? lid : 0;
1341         props->lmc = ppd->lmc;
1342         /* OPA logical states match IB logical states */
1343         props->state = driver_lstate(ppd);
1344         props->phys_state = hfi1_ibphys_portstate(ppd);
1345         props->gid_tbl_len = HFI1_GUIDS_PER_PORT;
1346         props->active_width = (u8)opa_width_to_ib(ppd->link_width_active);
1347         /* see rate_show() in ib core/sysfs.c */
1348         props->active_speed = (u8)opa_speed_to_ib(ppd->link_speed_active);
1349         props->max_vl_num = ppd->vls_supported;
1350
1351         /* Once we are a "first class" citizen and have added the OPA MTUs to
1352          * the core we can advertise the larger MTU enum to the ULPs, for now
1353          * advertise only 4K.
1354          *
1355          * Those applications which are either OPA aware or pass the MTU enum
1356          * from the Path Records to us will get the new 8k MTU.  Those that
1357          * attempt to process the MTU enum may fail in various ways.
1358          */
1359         props->max_mtu = mtu_to_enum((!valid_ib_mtu(hfi1_max_mtu) ?
1360                                       4096 : hfi1_max_mtu), IB_MTU_4096);
1361         props->active_mtu = !valid_ib_mtu(ppd->ibmtu) ? props->max_mtu :
1362                 mtu_to_enum(ppd->ibmtu, IB_MTU_2048);
1363
1364         return 0;
1365 }
1366
1367 static int modify_device(struct ib_device *device,
1368                          int device_modify_mask,
1369                          struct ib_device_modify *device_modify)
1370 {
1371         struct hfi1_devdata *dd = dd_from_ibdev(device);
1372         unsigned i;
1373         int ret;
1374
1375         if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
1376                                    IB_DEVICE_MODIFY_NODE_DESC)) {
1377                 ret = -EOPNOTSUPP;
1378                 goto bail;
1379         }
1380
1381         if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC) {
1382                 memcpy(device->node_desc, device_modify->node_desc, 64);
1383                 for (i = 0; i < dd->num_pports; i++) {
1384                         struct hfi1_ibport *ibp = &dd->pport[i].ibport_data;
1385
1386                         hfi1_node_desc_chg(ibp);
1387                 }
1388         }
1389
1390         if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) {
1391                 ib_hfi1_sys_image_guid =
1392                         cpu_to_be64(device_modify->sys_image_guid);
1393                 for (i = 0; i < dd->num_pports; i++) {
1394                         struct hfi1_ibport *ibp = &dd->pport[i].ibport_data;
1395
1396                         hfi1_sys_guid_chg(ibp);
1397                 }
1398         }
1399
1400         ret = 0;
1401
1402 bail:
1403         return ret;
1404 }
1405
1406 static int shut_down_port(struct rvt_dev_info *rdi, u8 port_num)
1407 {
1408         struct hfi1_ibdev *verbs_dev = dev_from_rdi(rdi);
1409         struct hfi1_devdata *dd = dd_from_dev(verbs_dev);
1410         struct hfi1_pportdata *ppd = &dd->pport[port_num - 1];
1411         int ret;
1412
1413         set_link_down_reason(ppd, OPA_LINKDOWN_REASON_UNKNOWN, 0,
1414                              OPA_LINKDOWN_REASON_UNKNOWN);
1415         ret = set_link_state(ppd, HLS_DN_DOWNDEF);
1416         return ret;
1417 }
1418
1419 static int hfi1_get_guid_be(struct rvt_dev_info *rdi, struct rvt_ibport *rvp,
1420                             int guid_index, __be64 *guid)
1421 {
1422         struct hfi1_ibport *ibp = container_of(rvp, struct hfi1_ibport, rvp);
1423         struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
1424
1425         if (guid_index == 0)
1426                 *guid = cpu_to_be64(ppd->guid);
1427         else if (guid_index < HFI1_GUIDS_PER_PORT)
1428                 *guid = ibp->guids[guid_index - 1];
1429         else
1430                 return -EINVAL;
1431
1432         return 0;
1433 }
1434
1435 /*
1436  * convert ah port,sl to sc
1437  */
1438 u8 ah_to_sc(struct ib_device *ibdev, struct ib_ah_attr *ah)
1439 {
1440         struct hfi1_ibport *ibp = to_iport(ibdev, ah->port_num);
1441
1442         return ibp->sl_to_sc[ah->sl];
1443 }
1444
1445 static int hfi1_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr)
1446 {
1447         struct hfi1_ibport *ibp;
1448         struct hfi1_pportdata *ppd;
1449         struct hfi1_devdata *dd;
1450         u8 sc5;
1451
1452         /* test the mapping for validity */
1453         ibp = to_iport(ibdev, ah_attr->port_num);
1454         ppd = ppd_from_ibp(ibp);
1455         sc5 = ibp->sl_to_sc[ah_attr->sl];
1456         dd = dd_from_ppd(ppd);
1457         if (sc_to_vlt(dd, sc5) > num_vls && sc_to_vlt(dd, sc5) != 0xf)
1458                 return -EINVAL;
1459         return 0;
1460 }
1461
1462 static void hfi1_notify_new_ah(struct ib_device *ibdev,
1463                                struct ib_ah_attr *ah_attr,
1464                                struct rvt_ah *ah)
1465 {
1466         struct hfi1_ibport *ibp;
1467         struct hfi1_pportdata *ppd;
1468         struct hfi1_devdata *dd;
1469         u8 sc5;
1470
1471         /*
1472          * Do not trust reading anything from rvt_ah at this point as it is not
1473          * done being setup. We can however modify things which we need to set.
1474          */
1475
1476         ibp = to_iport(ibdev, ah_attr->port_num);
1477         ppd = ppd_from_ibp(ibp);
1478         sc5 = ibp->sl_to_sc[ah->attr.sl];
1479         dd = dd_from_ppd(ppd);
1480         ah->vl = sc_to_vlt(dd, sc5);
1481         if (ah->vl < num_vls || ah->vl == 15)
1482                 ah->log_pmtu = ilog2(dd->vld[ah->vl].mtu);
1483 }
1484
1485 struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u16 dlid)
1486 {
1487         struct ib_ah_attr attr;
1488         struct ib_ah *ah = ERR_PTR(-EINVAL);
1489         struct rvt_qp *qp0;
1490
1491         memset(&attr, 0, sizeof(attr));
1492         attr.dlid = dlid;
1493         attr.port_num = ppd_from_ibp(ibp)->port;
1494         rcu_read_lock();
1495         qp0 = rcu_dereference(ibp->rvp.qp[0]);
1496         if (qp0)
1497                 ah = ib_create_ah(qp0->ibqp.pd, &attr);
1498         rcu_read_unlock();
1499         return ah;
1500 }
1501
1502 /**
1503  * hfi1_get_npkeys - return the size of the PKEY table for context 0
1504  * @dd: the hfi1_ib device
1505  */
1506 unsigned hfi1_get_npkeys(struct hfi1_devdata *dd)
1507 {
1508         return ARRAY_SIZE(dd->pport[0].pkeys);
1509 }
1510
1511 static void init_ibport(struct hfi1_pportdata *ppd)
1512 {
1513         struct hfi1_ibport *ibp = &ppd->ibport_data;
1514         size_t sz = ARRAY_SIZE(ibp->sl_to_sc);
1515         int i;
1516
1517         for (i = 0; i < sz; i++) {
1518                 ibp->sl_to_sc[i] = i;
1519                 ibp->sc_to_sl[i] = i;
1520         }
1521
1522         spin_lock_init(&ibp->rvp.lock);
1523         /* Set the prefix to the default value (see ch. 4.1.1) */
1524         ibp->rvp.gid_prefix = IB_DEFAULT_GID_PREFIX;
1525         ibp->rvp.sm_lid = 0;
1526         /* Below should only set bits defined in OPA PortInfo.CapabilityMask */
1527         ibp->rvp.port_cap_flags = IB_PORT_AUTO_MIGR_SUP |
1528                 IB_PORT_CAP_MASK_NOTICE_SUP;
1529         ibp->rvp.pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA;
1530         ibp->rvp.pma_counter_select[1] = IB_PMA_PORT_RCV_DATA;
1531         ibp->rvp.pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS;
1532         ibp->rvp.pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS;
1533         ibp->rvp.pma_counter_select[4] = IB_PMA_PORT_XMIT_WAIT;
1534
1535         RCU_INIT_POINTER(ibp->rvp.qp[0], NULL);
1536         RCU_INIT_POINTER(ibp->rvp.qp[1], NULL);
1537 }
1538
1539 /**
1540  * hfi1_register_ib_device - register our device with the infiniband core
1541  * @dd: the device data structure
1542  * Return 0 if successful, errno if unsuccessful.
1543  */
1544 int hfi1_register_ib_device(struct hfi1_devdata *dd)
1545 {
1546         struct hfi1_ibdev *dev = &dd->verbs_dev;
1547         struct ib_device *ibdev = &dev->rdi.ibdev;
1548         struct hfi1_pportdata *ppd = dd->pport;
1549         unsigned i;
1550         int ret;
1551         size_t lcpysz = IB_DEVICE_NAME_MAX;
1552
1553         for (i = 0; i < dd->num_pports; i++)
1554                 init_ibport(ppd + i);
1555
1556         /* Only need to initialize non-zero fields. */
1557
1558         setup_timer(&dev->mem_timer, mem_timer, (unsigned long)dev);
1559
1560         seqlock_init(&dev->iowait_lock);
1561         INIT_LIST_HEAD(&dev->txwait);
1562         INIT_LIST_HEAD(&dev->memwait);
1563
1564         ret = verbs_txreq_init(dev);
1565         if (ret)
1566                 goto err_verbs_txreq;
1567
1568         /*
1569          * The system image GUID is supposed to be the same for all
1570          * HFIs in a single system but since there can be other
1571          * device types in the system, we can't be sure this is unique.
1572          */
1573         if (!ib_hfi1_sys_image_guid)
1574                 ib_hfi1_sys_image_guid = cpu_to_be64(ppd->guid);
1575         lcpysz = strlcpy(ibdev->name, class_name(), lcpysz);
1576         strlcpy(ibdev->name + lcpysz, "_%d", IB_DEVICE_NAME_MAX - lcpysz);
1577         ibdev->owner = THIS_MODULE;
1578         ibdev->node_guid = cpu_to_be64(ppd->guid);
1579         ibdev->phys_port_cnt = dd->num_pports;
1580         ibdev->dma_device = &dd->pcidev->dev;
1581         ibdev->modify_device = modify_device;
1582
1583         /* keep process mad in the driver */
1584         ibdev->process_mad = hfi1_process_mad;
1585
1586         strncpy(ibdev->node_desc, init_utsname()->nodename,
1587                 sizeof(ibdev->node_desc));
1588
1589         /*
1590          * Fill in rvt info object.
1591          */
1592         dd->verbs_dev.rdi.driver_f.port_callback = hfi1_create_port_files;
1593         dd->verbs_dev.rdi.driver_f.get_card_name = get_card_name;
1594         dd->verbs_dev.rdi.driver_f.get_pci_dev = get_pci_dev;
1595         dd->verbs_dev.rdi.driver_f.check_ah = hfi1_check_ah;
1596         dd->verbs_dev.rdi.driver_f.notify_new_ah = hfi1_notify_new_ah;
1597         dd->verbs_dev.rdi.driver_f.get_guid_be = hfi1_get_guid_be;
1598         dd->verbs_dev.rdi.driver_f.query_port_state = query_port;
1599         dd->verbs_dev.rdi.driver_f.shut_down_port = shut_down_port;
1600         dd->verbs_dev.rdi.driver_f.cap_mask_chg = hfi1_cap_mask_chg;
1601         /*
1602          * Fill in rvt info device attributes.
1603          */
1604         hfi1_fill_device_attr(dd);
1605
1606         /* queue pair */
1607         dd->verbs_dev.rdi.dparms.qp_table_size = hfi1_qp_table_size;
1608         dd->verbs_dev.rdi.dparms.qpn_start = 0;
1609         dd->verbs_dev.rdi.dparms.qpn_inc = 1;
1610         dd->verbs_dev.rdi.dparms.qos_shift = dd->qos_shift;
1611         dd->verbs_dev.rdi.dparms.qpn_res_start = kdeth_qp << 16;
1612         dd->verbs_dev.rdi.dparms.qpn_res_end =
1613         dd->verbs_dev.rdi.dparms.qpn_res_start + 65535;
1614         dd->verbs_dev.rdi.dparms.max_rdma_atomic = HFI1_MAX_RDMA_ATOMIC;
1615         dd->verbs_dev.rdi.dparms.psn_mask = PSN_MASK;
1616         dd->verbs_dev.rdi.dparms.psn_shift = PSN_SHIFT;
1617         dd->verbs_dev.rdi.dparms.psn_modify_mask = PSN_MODIFY_MASK;
1618         dd->verbs_dev.rdi.dparms.core_cap_flags = RDMA_CORE_PORT_INTEL_OPA;
1619         dd->verbs_dev.rdi.dparms.max_mad_size = OPA_MGMT_MAD_SIZE;
1620
1621         dd->verbs_dev.rdi.driver_f.qp_priv_alloc = qp_priv_alloc;
1622         dd->verbs_dev.rdi.driver_f.qp_priv_free = qp_priv_free;
1623         dd->verbs_dev.rdi.driver_f.free_all_qps = free_all_qps;
1624         dd->verbs_dev.rdi.driver_f.notify_qp_reset = notify_qp_reset;
1625         dd->verbs_dev.rdi.driver_f.do_send = hfi1_do_send;
1626         dd->verbs_dev.rdi.driver_f.schedule_send = hfi1_schedule_send;
1627         dd->verbs_dev.rdi.driver_f.schedule_send_no_lock = _hfi1_schedule_send;
1628         dd->verbs_dev.rdi.driver_f.get_pmtu_from_attr = get_pmtu_from_attr;
1629         dd->verbs_dev.rdi.driver_f.notify_error_qp = notify_error_qp;
1630         dd->verbs_dev.rdi.driver_f.flush_qp_waiters = flush_qp_waiters;
1631         dd->verbs_dev.rdi.driver_f.stop_send_queue = stop_send_queue;
1632         dd->verbs_dev.rdi.driver_f.quiesce_qp = quiesce_qp;
1633         dd->verbs_dev.rdi.driver_f.notify_error_qp = notify_error_qp;
1634         dd->verbs_dev.rdi.driver_f.mtu_from_qp = mtu_from_qp;
1635         dd->verbs_dev.rdi.driver_f.mtu_to_path_mtu = mtu_to_path_mtu;
1636         dd->verbs_dev.rdi.driver_f.check_modify_qp = hfi1_check_modify_qp;
1637         dd->verbs_dev.rdi.driver_f.modify_qp = hfi1_modify_qp;
1638         dd->verbs_dev.rdi.driver_f.check_send_wqe = hfi1_check_send_wqe;
1639
1640         /* completeion queue */
1641         snprintf(dd->verbs_dev.rdi.dparms.cq_name,
1642                  sizeof(dd->verbs_dev.rdi.dparms.cq_name),
1643                  "hfi1_cq%d", dd->unit);
1644         dd->verbs_dev.rdi.dparms.node = dd->node;
1645
1646         /* misc settings */
1647         dd->verbs_dev.rdi.flags = 0; /* Let rdmavt handle it all */
1648         dd->verbs_dev.rdi.dparms.lkey_table_size = hfi1_lkey_table_size;
1649         dd->verbs_dev.rdi.dparms.nports = dd->num_pports;
1650         dd->verbs_dev.rdi.dparms.npkeys = hfi1_get_npkeys(dd);
1651
1652         ppd = dd->pport;
1653         for (i = 0; i < dd->num_pports; i++, ppd++)
1654                 rvt_init_port(&dd->verbs_dev.rdi,
1655                               &ppd->ibport_data.rvp,
1656                               i,
1657                               ppd->pkeys);
1658
1659         ret = rvt_register_device(&dd->verbs_dev.rdi);
1660         if (ret)
1661                 goto err_verbs_txreq;
1662
1663         ret = hfi1_verbs_register_sysfs(dd);
1664         if (ret)
1665                 goto err_class;
1666
1667         return ret;
1668
1669 err_class:
1670         rvt_unregister_device(&dd->verbs_dev.rdi);
1671 err_verbs_txreq:
1672         verbs_txreq_exit(dev);
1673         dd_dev_err(dd, "cannot register verbs: %d!\n", -ret);
1674         return ret;
1675 }
1676
1677 void hfi1_unregister_ib_device(struct hfi1_devdata *dd)
1678 {
1679         struct hfi1_ibdev *dev = &dd->verbs_dev;
1680
1681         hfi1_verbs_unregister_sysfs(dd);
1682
1683         rvt_unregister_device(&dd->verbs_dev.rdi);
1684
1685         if (!list_empty(&dev->txwait))
1686                 dd_dev_err(dd, "txwait list not empty!\n");
1687         if (!list_empty(&dev->memwait))
1688                 dd_dev_err(dd, "memwait list not empty!\n");
1689
1690         del_timer_sync(&dev->mem_timer);
1691         verbs_txreq_exit(dev);
1692 }
1693
1694 void hfi1_cnp_rcv(struct hfi1_packet *packet)
1695 {
1696         struct hfi1_ibport *ibp = &packet->rcd->ppd->ibport_data;
1697         struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
1698         struct hfi1_ib_header *hdr = packet->hdr;
1699         struct rvt_qp *qp = packet->qp;
1700         u32 lqpn, rqpn = 0;
1701         u16 rlid = 0;
1702         u8 sl, sc5, sc4_bit, svc_type;
1703         bool sc4_set = has_sc4_bit(packet);
1704
1705         switch (packet->qp->ibqp.qp_type) {
1706         case IB_QPT_UC:
1707                 rlid = qp->remote_ah_attr.dlid;
1708                 rqpn = qp->remote_qpn;
1709                 svc_type = IB_CC_SVCTYPE_UC;
1710                 break;
1711         case IB_QPT_RC:
1712                 rlid = qp->remote_ah_attr.dlid;
1713                 rqpn = qp->remote_qpn;
1714                 svc_type = IB_CC_SVCTYPE_RC;
1715                 break;
1716         case IB_QPT_SMI:
1717         case IB_QPT_GSI:
1718         case IB_QPT_UD:
1719                 svc_type = IB_CC_SVCTYPE_UD;
1720                 break;
1721         default:
1722                 ibp->rvp.n_pkt_drops++;
1723                 return;
1724         }
1725
1726         sc4_bit = sc4_set << 4;
1727         sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf;
1728         sc5 |= sc4_bit;
1729         sl = ibp->sc_to_sl[sc5];
1730         lqpn = qp->ibqp.qp_num;
1731
1732         process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
1733 }