verbs.c 53.6 KB
Newer Older
M
Mike Marciniszyn 已提交
1
/*
J
Jubin John 已提交
2
 * Copyright(c) 2015, 2016 Intel Corporation.
M
Mike Marciniszyn 已提交
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * BSD LICENSE
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  - Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  - Neither the name of Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include <rdma/ib_mad.h>
#include <rdma/ib_user_verbs.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/utsname.h>
#include <linux/rculist.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>

#include "hfi.h"
#include "common.h"
#include "device.h"
#include "trace.h"
#include "qp.h"
62
#include "verbs_txreq.h"
M
Mike Marciniszyn 已提交
63

64
static unsigned int hfi1_lkey_table_size = 16;
M
Mike Marciniszyn 已提交
65 66 67 68 69 70 71 72 73 74 75 76 77 78
module_param_named(lkey_table_size, hfi1_lkey_table_size, uint,
		   S_IRUGO);
MODULE_PARM_DESC(lkey_table_size,
		 "LKEY table size in bits (2^n, 1 <= n <= 23)");

static unsigned int hfi1_max_pds = 0xFFFF;
module_param_named(max_pds, hfi1_max_pds, uint, S_IRUGO);
MODULE_PARM_DESC(max_pds,
		 "Maximum number of protection domains to support");

static unsigned int hfi1_max_ahs = 0xFFFF;
module_param_named(max_ahs, hfi1_max_ahs, uint, S_IRUGO);
MODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support");

79
unsigned int hfi1_max_cqes = 0x2FFFFF;
M
Mike Marciniszyn 已提交
80 81 82 83 84 85 86 87 88 89 90 91
module_param_named(max_cqes, hfi1_max_cqes, uint, S_IRUGO);
MODULE_PARM_DESC(max_cqes,
		 "Maximum number of completion queue entries to support");

unsigned int hfi1_max_cqs = 0x1FFFF;
module_param_named(max_cqs, hfi1_max_cqs, uint, S_IRUGO);
MODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support");

unsigned int hfi1_max_qp_wrs = 0x3FFF;
module_param_named(max_qp_wrs, hfi1_max_qp_wrs, uint, S_IRUGO);
MODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support");

92
unsigned int hfi1_max_qps = 32768;
M
Mike Marciniszyn 已提交
93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122
module_param_named(max_qps, hfi1_max_qps, uint, S_IRUGO);
MODULE_PARM_DESC(max_qps, "Maximum number of QPs to support");

unsigned int hfi1_max_sges = 0x60;
module_param_named(max_sges, hfi1_max_sges, uint, S_IRUGO);
MODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support");

unsigned int hfi1_max_mcast_grps = 16384;
module_param_named(max_mcast_grps, hfi1_max_mcast_grps, uint, S_IRUGO);
MODULE_PARM_DESC(max_mcast_grps,
		 "Maximum number of multicast groups to support");

unsigned int hfi1_max_mcast_qp_attached = 16;
module_param_named(max_mcast_qp_attached, hfi1_max_mcast_qp_attached,
		   uint, S_IRUGO);
MODULE_PARM_DESC(max_mcast_qp_attached,
		 "Maximum number of attached QPs to support");

unsigned int hfi1_max_srqs = 1024;
module_param_named(max_srqs, hfi1_max_srqs, uint, S_IRUGO);
MODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support");

unsigned int hfi1_max_srq_sges = 128;
module_param_named(max_srq_sges, hfi1_max_srq_sges, uint, S_IRUGO);
MODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support");

unsigned int hfi1_max_srq_wrs = 0x1FFFF;
module_param_named(max_srq_wrs, hfi1_max_srq_wrs, uint, S_IRUGO);
MODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support");

123
unsigned short piothreshold = 256;
124 125 126
module_param(piothreshold, ushort, S_IRUGO);
MODULE_PARM_DESC(piothreshold, "size used to determine sdma vs. pio");

127 128 129 130 131 132 133
#define COPY_CACHELESS 1
#define COPY_ADAPTIVE  2
static unsigned int sge_copy_mode;
module_param(sge_copy_mode, uint, S_IRUGO);
MODULE_PARM_DESC(sge_copy_mode,
		 "Verbs copy mode: 0 use memcpy, 1 use cacheless copy, 2 adapt based on WSS");

M
Mike Marciniszyn 已提交
134 135
static void verbs_sdma_complete(
	struct sdma_txreq *cookie,
136
	int status);
M
Mike Marciniszyn 已提交
137

138 139 140 141 142
static int pio_wait(struct rvt_qp *qp,
		    struct send_context *sc,
		    struct hfi1_pkt_state *ps,
		    u32 flag);

143 144 145
/* Length of buffer to create verbs txreq cache name */
#define TXREQ_NAME_LEN 24

146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293
static uint wss_threshold;
module_param(wss_threshold, uint, S_IRUGO);
MODULE_PARM_DESC(wss_threshold, "Percentage (1-100) of LLC to use as a threshold for a cacheless copy");
static uint wss_clean_period = 256;
module_param(wss_clean_period, uint, S_IRUGO);
MODULE_PARM_DESC(wss_clean_period, "Count of verbs copies before an entry in the page copy table is cleaned");

/* memory working set size */
struct hfi1_wss {
	unsigned long *entries;
	atomic_t total_count;
	atomic_t clean_counter;
	atomic_t clean_entry;

	int threshold;
	int num_entries;
	long pages_mask;
};

static struct hfi1_wss wss;

int hfi1_wss_init(void)
{
	long llc_size;
	long llc_bits;
	long table_size;
	long table_bits;

	/* check for a valid percent range - default to 80 if none or invalid */
	if (wss_threshold < 1 || wss_threshold > 100)
		wss_threshold = 80;
	/* reject a wildly large period */
	if (wss_clean_period > 1000000)
		wss_clean_period = 256;
	/* reject a zero period */
	if (wss_clean_period == 0)
		wss_clean_period = 1;

	/*
	 * Calculate the table size - the next power of 2 larger than the
	 * LLC size.  LLC size is in KiB.
	 */
	llc_size = wss_llc_size() * 1024;
	table_size = roundup_pow_of_two(llc_size);

	/* one bit per page in rounded up table */
	llc_bits = llc_size / PAGE_SIZE;
	table_bits = table_size / PAGE_SIZE;
	wss.pages_mask = table_bits - 1;
	wss.num_entries = table_bits / BITS_PER_LONG;

	wss.threshold = (llc_bits * wss_threshold) / 100;
	if (wss.threshold == 0)
		wss.threshold = 1;

	atomic_set(&wss.clean_counter, wss_clean_period);

	wss.entries = kcalloc(wss.num_entries, sizeof(*wss.entries),
			      GFP_KERNEL);
	if (!wss.entries) {
		hfi1_wss_exit();
		return -ENOMEM;
	}

	return 0;
}

void hfi1_wss_exit(void)
{
	/* coded to handle partially initialized and repeat callers */
	kfree(wss.entries);
	wss.entries = NULL;
}

/*
 * Advance the clean counter.  When the clean period has expired,
 * clean an entry.
 *
 * This is implemented in atomics to avoid locking.  Because multiple
 * variables are involved, it can be racy which can lead to slightly
 * inaccurate information.  Since this is only a heuristic, this is
 * OK.  Any innaccuracies will clean themselves out as the counter
 * advances.  That said, it is unlikely the entry clean operation will
 * race - the next possible racer will not start until the next clean
 * period.
 *
 * The clean counter is implemented as a decrement to zero.  When zero
 * is reached an entry is cleaned.
 */
static void wss_advance_clean_counter(void)
{
	int entry;
	int weight;
	unsigned long bits;

	/* become the cleaner if we decrement the counter to zero */
	if (atomic_dec_and_test(&wss.clean_counter)) {
		/*
		 * Set, not add, the clean period.  This avoids an issue
		 * where the counter could decrement below the clean period.
		 * Doing a set can result in lost decrements, slowing the
		 * clean advance.  Since this a heuristic, this possible
		 * slowdown is OK.
		 *
		 * An alternative is to loop, advancing the counter by a
		 * clean period until the result is > 0. However, this could
		 * lead to several threads keeping another in the clean loop.
		 * This could be mitigated by limiting the number of times
		 * we stay in the loop.
		 */
		atomic_set(&wss.clean_counter, wss_clean_period);

		/*
		 * Uniquely grab the entry to clean and move to next.
		 * The current entry is always the lower bits of
		 * wss.clean_entry.  The table size, wss.num_entries,
		 * is always a power-of-2.
		 */
		entry = (atomic_inc_return(&wss.clean_entry) - 1)
			& (wss.num_entries - 1);

		/* clear the entry and count the bits */
		bits = xchg(&wss.entries[entry], 0);
		weight = hweight64((u64)bits);
		/* only adjust the contended total count if needed */
		if (weight)
			atomic_sub(weight, &wss.total_count);
	}
}

/*
 * Insert the given address into the working set array.
 */
static void wss_insert(void *address)
{
	u32 page = ((unsigned long)address >> PAGE_SHIFT) & wss.pages_mask;
	u32 entry = page / BITS_PER_LONG; /* assumes this ends up a shift */
	u32 nr = page & (BITS_PER_LONG - 1);

	if (!test_and_set_bit(nr, &wss.entries[entry]))
		atomic_inc(&wss.total_count);

	wss_advance_clean_counter();
}

/*
 * Is the working set larger than the threshold?
 */
294
static inline bool wss_exceeds_threshold(void)
295 296 297 298
{
	return atomic_read(&wss.total_count) >= wss.threshold;
}

299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314
/*
 * Translate ib_wr_opcode into ib_wc_opcode.
 */
const enum ib_wc_opcode ib_hfi1_wc_opcode[] = {
	[IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE,
	[IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE,
	[IB_WR_SEND] = IB_WC_SEND,
	[IB_WR_SEND_WITH_IMM] = IB_WC_SEND,
	[IB_WR_RDMA_READ] = IB_WC_RDMA_READ,
	[IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP,
	[IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD,
	[IB_WR_SEND_WITH_INV] = IB_WC_SEND,
	[IB_WR_LOCAL_INV] = IB_WC_LOCAL_INV,
	[IB_WR_REG_MR] = IB_WC_REG_MR
};

M
Mike Marciniszyn 已提交
315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337
/*
 * Length of header by opcode, 0 --> not supported
 */
const u8 hdr_len_by_opcode[256] = {
	/* RC */
	[IB_OPCODE_RC_SEND_FIRST]                     = 12 + 8,
	[IB_OPCODE_RC_SEND_MIDDLE]                    = 12 + 8,
	[IB_OPCODE_RC_SEND_LAST]                      = 12 + 8,
	[IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE]       = 12 + 8 + 4,
	[IB_OPCODE_RC_SEND_ONLY]                      = 12 + 8,
	[IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE]       = 12 + 8 + 4,
	[IB_OPCODE_RC_RDMA_WRITE_FIRST]               = 12 + 8 + 16,
	[IB_OPCODE_RC_RDMA_WRITE_MIDDLE]              = 12 + 8,
	[IB_OPCODE_RC_RDMA_WRITE_LAST]                = 12 + 8,
	[IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
	[IB_OPCODE_RC_RDMA_WRITE_ONLY]                = 12 + 8 + 16,
	[IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20,
	[IB_OPCODE_RC_RDMA_READ_REQUEST]              = 12 + 8 + 16,
	[IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST]       = 12 + 8 + 4,
	[IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE]      = 12 + 8,
	[IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST]        = 12 + 8 + 4,
	[IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY]        = 12 + 8 + 4,
	[IB_OPCODE_RC_ACKNOWLEDGE]                    = 12 + 8 + 4,
338
	[IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE]             = 12 + 8 + 4 + 8,
M
Mike Marciniszyn 已提交
339 340
	[IB_OPCODE_RC_COMPARE_SWAP]                   = 12 + 8 + 28,
	[IB_OPCODE_RC_FETCH_ADD]                      = 12 + 8 + 28,
341 342
	[IB_OPCODE_RC_SEND_LAST_WITH_INVALIDATE]      = 12 + 8 + 4,
	[IB_OPCODE_RC_SEND_ONLY_WITH_INVALIDATE]      = 12 + 8 + 4,
M
Mike Marciniszyn 已提交
343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383
	/* UC */
	[IB_OPCODE_UC_SEND_FIRST]                     = 12 + 8,
	[IB_OPCODE_UC_SEND_MIDDLE]                    = 12 + 8,
	[IB_OPCODE_UC_SEND_LAST]                      = 12 + 8,
	[IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE]       = 12 + 8 + 4,
	[IB_OPCODE_UC_SEND_ONLY]                      = 12 + 8,
	[IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE]       = 12 + 8 + 4,
	[IB_OPCODE_UC_RDMA_WRITE_FIRST]               = 12 + 8 + 16,
	[IB_OPCODE_UC_RDMA_WRITE_MIDDLE]              = 12 + 8,
	[IB_OPCODE_UC_RDMA_WRITE_LAST]                = 12 + 8,
	[IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
	[IB_OPCODE_UC_RDMA_WRITE_ONLY]                = 12 + 8 + 16,
	[IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20,
	/* UD */
	[IB_OPCODE_UD_SEND_ONLY]                      = 12 + 8 + 8,
	[IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE]       = 12 + 8 + 12
};

static const opcode_handler opcode_handler_tbl[256] = {
	/* RC */
	[IB_OPCODE_RC_SEND_FIRST]                     = &hfi1_rc_rcv,
	[IB_OPCODE_RC_SEND_MIDDLE]                    = &hfi1_rc_rcv,
	[IB_OPCODE_RC_SEND_LAST]                      = &hfi1_rc_rcv,
	[IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE]       = &hfi1_rc_rcv,
	[IB_OPCODE_RC_SEND_ONLY]                      = &hfi1_rc_rcv,
	[IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE]       = &hfi1_rc_rcv,
	[IB_OPCODE_RC_RDMA_WRITE_FIRST]               = &hfi1_rc_rcv,
	[IB_OPCODE_RC_RDMA_WRITE_MIDDLE]              = &hfi1_rc_rcv,
	[IB_OPCODE_RC_RDMA_WRITE_LAST]                = &hfi1_rc_rcv,
	[IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_rc_rcv,
	[IB_OPCODE_RC_RDMA_WRITE_ONLY]                = &hfi1_rc_rcv,
	[IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_rc_rcv,
	[IB_OPCODE_RC_RDMA_READ_REQUEST]              = &hfi1_rc_rcv,
	[IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST]       = &hfi1_rc_rcv,
	[IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE]      = &hfi1_rc_rcv,
	[IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST]        = &hfi1_rc_rcv,
	[IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY]        = &hfi1_rc_rcv,
	[IB_OPCODE_RC_ACKNOWLEDGE]                    = &hfi1_rc_rcv,
	[IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE]             = &hfi1_rc_rcv,
	[IB_OPCODE_RC_COMPARE_SWAP]                   = &hfi1_rc_rcv,
	[IB_OPCODE_RC_FETCH_ADD]                      = &hfi1_rc_rcv,
384 385
	[IB_OPCODE_RC_SEND_LAST_WITH_INVALIDATE]      = &hfi1_rc_rcv,
	[IB_OPCODE_RC_SEND_ONLY_WITH_INVALIDATE]      = &hfi1_rc_rcv,
M
Mike Marciniszyn 已提交
386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405
	/* UC */
	[IB_OPCODE_UC_SEND_FIRST]                     = &hfi1_uc_rcv,
	[IB_OPCODE_UC_SEND_MIDDLE]                    = &hfi1_uc_rcv,
	[IB_OPCODE_UC_SEND_LAST]                      = &hfi1_uc_rcv,
	[IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE]       = &hfi1_uc_rcv,
	[IB_OPCODE_UC_SEND_ONLY]                      = &hfi1_uc_rcv,
	[IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE]       = &hfi1_uc_rcv,
	[IB_OPCODE_UC_RDMA_WRITE_FIRST]               = &hfi1_uc_rcv,
	[IB_OPCODE_UC_RDMA_WRITE_MIDDLE]              = &hfi1_uc_rcv,
	[IB_OPCODE_UC_RDMA_WRITE_LAST]                = &hfi1_uc_rcv,
	[IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_uc_rcv,
	[IB_OPCODE_UC_RDMA_WRITE_ONLY]                = &hfi1_uc_rcv,
	[IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_uc_rcv,
	/* UD */
	[IB_OPCODE_UD_SEND_ONLY]                      = &hfi1_ud_rcv,
	[IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE]       = &hfi1_ud_rcv,
	/* CNP */
	[IB_OPCODE_CNP]				      = &hfi1_cnp_rcv
};

406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427
#define OPMASK 0x1f

static const u32 pio_opmask[BIT(3)] = {
	/* RC */
	[IB_OPCODE_RC >> 5] =
		BIT(RC_OP(SEND_ONLY) & OPMASK) |
		BIT(RC_OP(SEND_ONLY_WITH_IMMEDIATE) & OPMASK) |
		BIT(RC_OP(RDMA_WRITE_ONLY) & OPMASK) |
		BIT(RC_OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE) & OPMASK) |
		BIT(RC_OP(RDMA_READ_REQUEST) & OPMASK) |
		BIT(RC_OP(ACKNOWLEDGE) & OPMASK) |
		BIT(RC_OP(ATOMIC_ACKNOWLEDGE) & OPMASK) |
		BIT(RC_OP(COMPARE_SWAP) & OPMASK) |
		BIT(RC_OP(FETCH_ADD) & OPMASK),
	/* UC */
	[IB_OPCODE_UC >> 5] =
		BIT(UC_OP(SEND_ONLY) & OPMASK) |
		BIT(UC_OP(SEND_ONLY_WITH_IMMEDIATE) & OPMASK) |
		BIT(UC_OP(RDMA_WRITE_ONLY) & OPMASK) |
		BIT(UC_OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE) & OPMASK),
};

M
Mike Marciniszyn 已提交
428 429 430 431 432 433 434 435 436 437
/*
 * System image GUID.
 */
__be64 ib_hfi1_sys_image_guid;

/**
 * hfi1_copy_sge - copy data to SGE memory
 * @ss: the SGE state
 * @data: the data to copy
 * @length: the length of the data
438
 * @release: boolean to release MR
439
 * @copy_last: do a separate copy of the last 8 bytes
M
Mike Marciniszyn 已提交
440 441
 */
void hfi1_copy_sge(
442
	struct rvt_sge_state *ss,
M
Mike Marciniszyn 已提交
443
	void *data, u32 length,
444 445
	bool release,
	bool copy_last)
M
Mike Marciniszyn 已提交
446
{
447
	struct rvt_sge *sge = &ss->sge;
448
	int i;
449 450
	bool in_last = false;
	bool cacheless_copy = false;
451 452 453 454 455 456 457 458 459 460 461 462 463

	if (sge_copy_mode == COPY_CACHELESS) {
		cacheless_copy = length >= PAGE_SIZE;
	} else if (sge_copy_mode == COPY_ADAPTIVE) {
		if (length >= PAGE_SIZE) {
			/*
			 * NOTE: this *assumes*:
			 * o The first vaddr is the dest.
			 * o If multiple pages, then vaddr is sequential.
			 */
			wss_insert(sge->vaddr);
			if (length >= (2 * PAGE_SIZE))
				wss_insert(sge->vaddr + PAGE_SIZE);
M
Mike Marciniszyn 已提交
464

465 466 467 468 469
			cacheless_copy = wss_exceeds_threshold();
		} else {
			wss_advance_clean_counter();
		}
	}
470 471 472 473
	if (copy_last) {
		if (length > 8) {
			length -= 8;
		} else {
474 475
			copy_last = false;
			in_last = true;
476 477 478 479
		}
	}

again:
M
Mike Marciniszyn 已提交
480
	while (length) {
481
		u32 len = rvt_get_sge_length(sge, length);
M
Mike Marciniszyn 已提交
482 483

		WARN_ON_ONCE(len == 0);
484 485
		if (unlikely(in_last)) {
			/* enforce byte transfer ordering */
486 487
			for (i = 0; i < len; i++)
				((u8 *)sge->vaddr)[i] = ((u8 *)data)[i];
488 489
		} else if (cacheless_copy) {
			cacheless_memcpy(sge->vaddr, data, len);
490 491 492
		} else {
			memcpy(sge->vaddr, data, len);
		}
493
		rvt_update_sge(ss, len, release);
M
Mike Marciniszyn 已提交
494 495 496
		data += len;
		length -= len;
	}
497 498

	if (copy_last) {
499 500
		copy_last = false;
		in_last = true;
501 502 503
		length = 8;
		goto again;
	}
M
Mike Marciniszyn 已提交
504 505 506 507 508
}

/*
 * Make sure the QP is ready and able to accept the given opcode.
 */
509
static inline opcode_handler qp_ok(int opcode, struct hfi1_packet *packet)
M
Mike Marciniszyn 已提交
510
{
511
	if (!(ib_rvt_state_ops[packet->qp->state] & RVT_PROCESS_RECV_OK))
512
		return NULL;
513
	if (((opcode & RVT_OPCODE_QP_MASK) == packet->qp->allowed_ops) ||
M
Mike Marciniszyn 已提交
514
	    (opcode == IB_OPCODE_CNP))
515 516 517
		return opcode_handler_tbl[opcode];

	return NULL;
M
Mike Marciniszyn 已提交
518 519 520 521 522 523 524 525 526 527 528 529 530
}

/**
 * hfi1_ib_rcv - process an incoming packet
 * @packet: data packet information
 *
 * This is called to process an incoming packet at interrupt level.
 *
 * Tlen is the length of the header + data + CRC in bytes.
 */
void hfi1_ib_rcv(struct hfi1_packet *packet)
{
	struct hfi1_ctxtdata *rcd = packet->rcd;
531
	struct ib_header *hdr = packet->hdr;
M
Mike Marciniszyn 已提交
532 533
	u32 tlen = packet->tlen;
	struct hfi1_pportdata *ppd = rcd->ppd;
534
	struct hfi1_ibport *ibp = rcd_to_iport(rcd);
535
	struct rvt_dev_info *rdi = &ppd->dd->verbs_dev.rdi;
536
	opcode_handler packet_handler;
537
	unsigned long flags;
M
Mike Marciniszyn 已提交
538 539 540 541 542 543 544
	u32 qp_num;
	int lnh;
	u8 opcode;
	u16 lid;

	/* Check for GRH */
	lnh = be16_to_cpu(hdr->lrh[0]) & 3;
545
	if (lnh == HFI1_LRH_BTH) {
M
Mike Marciniszyn 已提交
546
		packet->ohdr = &hdr->u.oth;
547
	} else if (lnh == HFI1_LRH_GRH) {
M
Mike Marciniszyn 已提交
548 549 550 551 552 553 554 555 556
		u32 vtf;

		packet->ohdr = &hdr->u.l.oth;
		if (hdr->u.l.grh.next_hdr != IB_GRH_NEXT_HDR)
			goto drop;
		vtf = be32_to_cpu(hdr->u.l.grh.version_tclass_flow);
		if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
			goto drop;
		packet->rcv_flags |= HFI1_HAS_GRH;
557
	} else {
M
Mike Marciniszyn 已提交
558
		goto drop;
559
	}
M
Mike Marciniszyn 已提交
560 561 562 563 564 565 566

	trace_input_ibhdr(rcd->dd, hdr);

	opcode = (be32_to_cpu(packet->ohdr->bth[0]) >> 24);
	inc_opstats(tlen, &rcd->opstats->stats[opcode]);

	/* Get the destination QP number. */
567
	qp_num = be32_to_cpu(packet->ohdr->bth[1]) & RVT_QPN_MASK;
M
Mike Marciniszyn 已提交
568
	lid = be16_to_cpu(hdr->lrh[1]);
569 570
	if (unlikely((lid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
		     (lid != be16_to_cpu(IB_LID_PERMISSIVE)))) {
571 572
		struct rvt_mcast *mcast;
		struct rvt_mcast_qp *p;
M
Mike Marciniszyn 已提交
573 574 575

		if (lnh != HFI1_LRH_GRH)
			goto drop;
576
		mcast = rvt_mcast_find(&ibp->rvp, &hdr->u.l.grh.dgid);
577
		if (!mcast)
M
Mike Marciniszyn 已提交
578 579 580
			goto drop;
		list_for_each_entry_rcu(p, &mcast->qp_list, list) {
			packet->qp = p->qp;
581
			spin_lock_irqsave(&packet->qp->r_lock, flags);
582 583 584 585 586
			packet_handler = qp_ok(opcode, packet);
			if (likely(packet_handler))
				packet_handler(packet);
			else
				ibp->rvp.n_pkt_drops++;
587
			spin_unlock_irqrestore(&packet->qp->r_lock, flags);
M
Mike Marciniszyn 已提交
588 589
		}
		/*
590
		 * Notify rvt_multicast_detach() if it is waiting for us
M
Mike Marciniszyn 已提交
591 592 593 594 595 596
		 * to finish.
		 */
		if (atomic_dec_return(&mcast->refcount) <= 1)
			wake_up(&mcast->wait);
	} else {
		rcu_read_lock();
597
		packet->qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
M
Mike Marciniszyn 已提交
598 599 600 601
		if (!packet->qp) {
			rcu_read_unlock();
			goto drop;
		}
602
		spin_lock_irqsave(&packet->qp->r_lock, flags);
603 604 605 606 607
		packet_handler = qp_ok(opcode, packet);
		if (likely(packet_handler))
			packet_handler(packet);
		else
			ibp->rvp.n_pkt_drops++;
608
		spin_unlock_irqrestore(&packet->qp->r_lock, flags);
M
Mike Marciniszyn 已提交
609 610 611 612 613
		rcu_read_unlock();
	}
	return;

drop:
614
	ibp->rvp.n_pkt_drops++;
M
Mike Marciniszyn 已提交
615 616 617 618 619 620 621 622 623 624
}

/*
 * This is called from a timer to check for QPs
 * which need kernel memory in order to send a packet.
 */
static void mem_timer(unsigned long data)
{
	struct hfi1_ibdev *dev = (struct hfi1_ibdev *)data;
	struct list_head *list = &dev->memwait;
625
	struct rvt_qp *qp = NULL;
M
Mike Marciniszyn 已提交
626 627
	struct iowait *wait;
	unsigned long flags;
628
	struct hfi1_qp_priv *priv;
M
Mike Marciniszyn 已提交
629 630 631 632

	write_seqlock_irqsave(&dev->iowait_lock, flags);
	if (!list_empty(list)) {
		wait = list_first_entry(list, struct iowait, list);
633 634 635
		qp = iowait_to_qp(wait);
		priv = qp->priv;
		list_del_init(&priv->s_iowait.list);
636
		priv->s_iowait.lock = NULL;
M
Mike Marciniszyn 已提交
637 638 639 640 641 642 643
		/* refcount held until actual wake up */
		if (!list_empty(list))
			mod_timer(&dev->mem_timer, jiffies + 1);
	}
	write_sequnlock_irqrestore(&dev->iowait_lock, flags);

	if (qp)
644
		hfi1_qp_wakeup(qp, RVT_S_WAIT_KMEM);
M
Mike Marciniszyn 已提交
645 646 647 648 649 650 651 652
}

/*
 * This is called with progress side lock held.
 */
/* New API */
static void verbs_sdma_complete(
	struct sdma_txreq *cookie,
653
	int status)
M
Mike Marciniszyn 已提交
654 655 656
{
	struct verbs_txreq *tx =
		container_of(cookie, struct verbs_txreq, txreq);
657
	struct rvt_qp *qp = tx->qp;
M
Mike Marciniszyn 已提交
658 659

	spin_lock(&qp->s_lock);
660
	if (tx->wqe) {
M
Mike Marciniszyn 已提交
661
		hfi1_send_complete(qp, tx->wqe, IB_WC_SUCCESS);
662
	} else if (qp->ibqp.qp_type == IB_QPT_RC) {
663
		struct ib_header *hdr;
M
Mike Marciniszyn 已提交
664 665 666 667 668 669 670 671 672

		hdr = &tx->phdr.hdr;
		hfi1_rc_send_complete(qp, hdr);
	}
	spin_unlock(&qp->s_lock);

	hfi1_put_txreq(tx);
}

673 674 675
static int wait_kmem(struct hfi1_ibdev *dev,
		     struct rvt_qp *qp,
		     struct hfi1_pkt_state *ps)
M
Mike Marciniszyn 已提交
676
{
677
	struct hfi1_qp_priv *priv = qp->priv;
M
Mike Marciniszyn 已提交
678 679 680 681
	unsigned long flags;
	int ret = 0;

	spin_lock_irqsave(&qp->s_lock, flags);
682
	if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
M
Mike Marciniszyn 已提交
683
		write_seqlock(&dev->iowait_lock);
684 685
		list_add_tail(&ps->s_txreq->txreq.list,
			      &priv->s_iowait.tx_head);
686
		if (list_empty(&priv->s_iowait.list)) {
M
Mike Marciniszyn 已提交
687 688
			if (list_empty(&dev->memwait))
				mod_timer(&dev->mem_timer, jiffies + 1);
689
			qp->s_flags |= RVT_S_WAIT_KMEM;
690
			list_add_tail(&priv->s_iowait.list, &dev->memwait);
691
			priv->s_iowait.lock = &dev->iowait_lock;
692
			trace_hfi1_qpsleep(qp, RVT_S_WAIT_KMEM);
693
			rvt_get_qp(qp);
M
Mike Marciniszyn 已提交
694 695
		}
		write_sequnlock(&dev->iowait_lock);
696
		qp->s_flags &= ~RVT_S_BUSY;
M
Mike Marciniszyn 已提交
697 698 699 700 701 702 703 704 705 706 707 708
		ret = -EBUSY;
	}
	spin_unlock_irqrestore(&qp->s_lock, flags);

	return ret;
}

/*
 * This routine calls txadds for each sg entry.
 *
 * Add failures will revert the sge cursor
 */
709
static noinline int build_verbs_ulp_payload(
M
Mike Marciniszyn 已提交
710 711 712 713
	struct sdma_engine *sde,
	u32 length,
	struct verbs_txreq *tx)
{
714
	struct rvt_sge_state *ss = tx->ss;
715 716
	struct rvt_sge *sg_list = ss->sg_list;
	struct rvt_sge sge = ss->sge;
M
Mike Marciniszyn 已提交
717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734
	u8 num_sge = ss->num_sge;
	u32 len;
	int ret = 0;

	while (length) {
		len = ss->sge.length;
		if (len > length)
			len = length;
		if (len > ss->sge.sge_length)
			len = ss->sge.sge_length;
		WARN_ON_ONCE(len == 0);
		ret = sdma_txadd_kvaddr(
			sde->dd,
			&tx->txreq,
			ss->sge.vaddr,
			len);
		if (ret)
			goto bail_txadd;
735
		rvt_update_sge(ss, len, false);
M
Mike Marciniszyn 已提交
736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752
		length -= len;
	}
	return ret;
bail_txadd:
	/* unwind cursor */
	ss->sge = sge;
	ss->num_sge = num_sge;
	ss->sg_list = sg_list;
	return ret;
}

/*
 * Build the number of DMA descriptors needed to send length bytes of data.
 *
 * NOTE: DMA mapping is held in the tx until completed in the ring or
 *       the tx desc is freed without having been submitted to the ring
 *
753
 * This routine ensures all the helper routine calls succeed.
M
Mike Marciniszyn 已提交
754 755 756 757 758 759
 */
/* New API */
static int build_verbs_tx_desc(
	struct sdma_engine *sde,
	u32 length,
	struct verbs_txreq *tx,
760
	struct hfi1_ahg_info *ahg_info,
M
Mike Marciniszyn 已提交
761 762 763
	u64 pbc)
{
	int ret = 0;
764
	struct hfi1_sdma_header *phdr = &tx->phdr;
M
Mike Marciniszyn 已提交
765 766
	u16 hdrbytes = tx->hdr_dwords << 2;

767
	if (!ahg_info->ahgcount) {
M
Mike Marciniszyn 已提交
768 769
		ret = sdma_txinit_ahg(
			&tx->txreq,
770
			ahg_info->tx_flags,
M
Mike Marciniszyn 已提交
771
			hdrbytes + length,
772
			ahg_info->ahgidx,
M
Mike Marciniszyn 已提交
773 774 775 776 777 778 779 780 781 782
			0,
			NULL,
			0,
			verbs_sdma_complete);
		if (ret)
			goto bail_txadd;
		phdr->pbc = cpu_to_le64(pbc);
		ret = sdma_txadd_kvaddr(
			sde->dd,
			&tx->txreq,
783 784
			phdr,
			hdrbytes);
M
Mike Marciniszyn 已提交
785 786 787 788 789
		if (ret)
			goto bail_txadd;
	} else {
		ret = sdma_txinit_ahg(
			&tx->txreq,
790
			ahg_info->tx_flags,
M
Mike Marciniszyn 已提交
791
			length,
792 793 794
			ahg_info->ahgidx,
			ahg_info->ahgcount,
			ahg_info->ahgdesc,
M
Mike Marciniszyn 已提交
795 796 797 798 799 800
			hdrbytes,
			verbs_sdma_complete);
		if (ret)
			goto bail_txadd;
	}

801 802 803
	/* add the ulp payload - if any. tx->ss can be NULL for acks */
	if (tx->ss)
		ret = build_verbs_ulp_payload(sde, length, tx);
M
Mike Marciniszyn 已提交
804 805 806 807
bail_txadd:
	return ret;
}

808
int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
809
			u64 pbc)
M
Mike Marciniszyn 已提交
810
{
811
	struct hfi1_qp_priv *priv = qp->priv;
812
	struct hfi1_ahg_info *ahg_info = priv->s_ahg;
813
	u32 hdrwords = qp->s_hdrwords;
814
	u32 len = ps->s_txreq->s_cur_size;
815 816 817
	u32 plen = hdrwords + ((len + 3) >> 2) + 2; /* includes pbc */
	struct hfi1_ibdev *dev = ps->dev;
	struct hfi1_pportdata *ppd = ps->ppd;
M
Mike Marciniszyn 已提交
818 819
	struct verbs_txreq *tx;
	u64 pbc_flags = 0;
820 821
	u8 sc5 = priv->s_sc;

M
Mike Marciniszyn 已提交
822 823
	int ret;

824
	tx = ps->s_txreq;
825 826 827 828 829 830 831 832 833 834 835 836 837 838
	if (!sdma_txreq_built(&tx->txreq)) {
		if (likely(pbc == 0)) {
			u32 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5);
			/* No vl15 here */
			/* set PBC_DC_INFO bit (aka SC[4]) in pbc_flags */
			pbc_flags |= (!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT;

			pbc = create_pbc(ppd,
					 pbc_flags,
					 qp->srate_mbps,
					 vl,
					 plen);
		}
		tx->wqe = qp->s_wqe;
839
		ret = build_verbs_tx_desc(tx->sde, len, tx, ahg_info, pbc);
840 841
		if (unlikely(ret))
			goto bail_build;
M
Mike Marciniszyn 已提交
842
	}
843 844 845 846 847 848
	ret =  sdma_send_txreq(tx->sde, &priv->s_iowait, &tx->txreq);
	if (unlikely(ret < 0)) {
		if (ret == -ECOMM)
			goto bail_ecomm;
		return ret;
	}
849 850
	trace_sdma_output_ibhdr(dd_from_ibdev(qp->ibqp.device),
				&ps->s_txreq->phdr.hdr);
M
Mike Marciniszyn 已提交
851 852 853 854 855 856
	return ret;

bail_ecomm:
	/* The current one got "sent" */
	return 0;
bail_build:
857 858 859 860 861 862 863
	ret = wait_kmem(dev, qp, ps);
	if (!ret) {
		/* free txreq - bad state */
		hfi1_put_txreq(ps->s_txreq);
		ps->s_txreq = NULL;
	}
	return ret;
M
Mike Marciniszyn 已提交
864 865 866 867 868 869
}

/*
 * If we are now in the error state, return zero to flush the
 * send work request.
 */
870 871 872 873
static int pio_wait(struct rvt_qp *qp,
		    struct send_context *sc,
		    struct hfi1_pkt_state *ps,
		    u32 flag)
M
Mike Marciniszyn 已提交
874
{
875
	struct hfi1_qp_priv *priv = qp->priv;
M
Mike Marciniszyn 已提交
876 877 878 879 880 881 882 883 884 885 886 887
	struct hfi1_devdata *dd = sc->dd;
	struct hfi1_ibdev *dev = &dd->verbs_dev;
	unsigned long flags;
	int ret = 0;

	/*
	 * Note that as soon as want_buffer() is called and
	 * possibly before it returns, sc_piobufavail()
	 * could be called. Therefore, put QP on the I/O wait list before
	 * enabling the PIO avail interrupt.
	 */
	spin_lock_irqsave(&qp->s_lock, flags);
888
	if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
M
Mike Marciniszyn 已提交
889
		write_seqlock(&dev->iowait_lock);
890 891
		list_add_tail(&ps->s_txreq->txreq.list,
			      &priv->s_iowait.tx_head);
892
		if (list_empty(&priv->s_iowait.list)) {
M
Mike Marciniszyn 已提交
893 894 895
			struct hfi1_ibdev *dev = &dd->verbs_dev;
			int was_empty;

896 897 898
			dev->n_piowait += !!(flag & RVT_S_WAIT_PIO);
			dev->n_piodrain += !!(flag & RVT_S_WAIT_PIO_DRAIN);
			qp->s_flags |= flag;
M
Mike Marciniszyn 已提交
899
			was_empty = list_empty(&sc->piowait);
900
			list_add_tail(&priv->s_iowait.list, &sc->piowait);
901
			priv->s_iowait.lock = &dev->iowait_lock;
902
			trace_hfi1_qpsleep(qp, RVT_S_WAIT_PIO);
903
			rvt_get_qp(qp);
M
Mike Marciniszyn 已提交
904 905 906 907 908
			/* counting: only call wantpiobuf_intr if first user */
			if (was_empty)
				hfi1_sc_wantpiobuf_intr(sc, 1);
		}
		write_sequnlock(&dev->iowait_lock);
909
		qp->s_flags &= ~RVT_S_BUSY;
M
Mike Marciniszyn 已提交
910 911 912 913 914 915
		ret = -EBUSY;
	}
	spin_unlock_irqrestore(&qp->s_lock, flags);
	return ret;
}

916 917 918 919 920 921 922 923 924
static void verbs_pio_complete(void *arg, int code)
{
	struct rvt_qp *qp = (struct rvt_qp *)arg;
	struct hfi1_qp_priv *priv = qp->priv;

	if (iowait_pio_dec(&priv->s_iowait))
		iowait_drain_wakeup(&priv->s_iowait);
}

925
int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
926
			u64 pbc)
M
Mike Marciniszyn 已提交
927
{
928
	struct hfi1_qp_priv *priv = qp->priv;
929
	u32 hdrwords = qp->s_hdrwords;
930
	struct rvt_sge_state *ss = ps->s_txreq->ss;
931
	u32 len = ps->s_txreq->s_cur_size;
932 933 934
	u32 dwords = (len + 3) >> 2;
	u32 plen = hdrwords + dwords + 2; /* includes pbc */
	struct hfi1_pportdata *ppd = ps->ppd;
935
	u32 *hdr = (u32 *)&ps->s_txreq->phdr.hdr;
M
Mike Marciniszyn 已提交
936
	u64 pbc_flags = 0;
937
	u8 sc5;
M
Mike Marciniszyn 已提交
938 939 940 941
	unsigned long flags = 0;
	struct send_context *sc;
	struct pio_buf *pbuf;
	int wc_status = IB_WC_SUCCESS;
942
	int ret = 0;
943 944 945 946 947 948 949 950 951 952 953
	pio_release_cb cb = NULL;

	/* only RC/UC use complete */
	switch (qp->ibqp.qp_type) {
	case IB_QPT_RC:
	case IB_QPT_UC:
		cb = verbs_pio_complete;
		break;
	default:
		break;
	}
M
Mike Marciniszyn 已提交
954 955

	/* vl15 special case taken care of in ud.c */
956
	sc5 = priv->s_sc;
957
	sc = ps->s_txreq->psc;
M
Mike Marciniszyn 已提交
958 959

	if (likely(pbc == 0)) {
960
		u8 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5);
M
Mike Marciniszyn 已提交
961 962 963 964
		/* set PBC_DC_INFO bit (aka SC[4]) in pbc_flags */
		pbc_flags |= (!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT;
		pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps, vl, plen);
	}
965 966 967
	if (cb)
		iowait_pio_inc(&priv->s_iowait);
	pbuf = sc_buffer_alloc(sc, plen, cb, qp);
968
	if (unlikely(!pbuf)) {
969 970
		if (cb)
			verbs_pio_complete(qp, 0);
M
Mike Marciniszyn 已提交
971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989
		if (ppd->host_link_state != HLS_UP_ACTIVE) {
			/*
			 * If we have filled the PIO buffers to capacity and are
			 * not in an active state this request is not going to
			 * go out to so just complete it with an error or else a
			 * ULP or the core may be stuck waiting.
			 */
			hfi1_cdbg(
				PIO,
				"alloc failed. state not active, completing");
			wc_status = IB_WC_GENERAL_ERR;
			goto pio_bail;
		} else {
			/*
			 * This is a normal occurrence. The PIO buffs are full
			 * up but we are still happily sending, well we could be
			 * so lets continue to queue the request.
			 */
			hfi1_cdbg(PIO, "alloc failed. state active, queuing");
990
			ret = pio_wait(qp, sc, ps, RVT_S_WAIT_PIO);
991
			if (!ret)
992
				/* txreq not queued - free */
993 994 995
				goto bail;
			/* tx consumed in wait */
			return ret;
M
Mike Marciniszyn 已提交
996 997 998 999 1000 1001 1002
		}
	}

	if (len == 0) {
		pio_copy(ppd->dd, pbuf, pbc, hdr, hdrwords);
	} else {
		if (ss) {
1003
			seg_pio_copy_start(pbuf, pbc, hdr, hdrwords * 4);
M
Mike Marciniszyn 已提交
1004 1005 1006 1007 1008 1009
			while (len) {
				void *addr = ss->sge.vaddr;
				u32 slen = ss->sge.length;

				if (slen > len)
					slen = len;
1010
				rvt_update_sge(ss, slen, false);
M
Mike Marciniszyn 已提交
1011 1012 1013 1014 1015 1016 1017
				seg_pio_copy_mid(pbuf, addr, slen);
				len -= slen;
			}
			seg_pio_copy_end(pbuf);
		}
	}

1018 1019
	trace_pio_output_ibhdr(dd_from_ibdev(qp->ibqp.device),
			       &ps->s_txreq->phdr.hdr);
M
Mike Marciniszyn 已提交
1020 1021 1022 1023 1024 1025 1026 1027

pio_bail:
	if (qp->s_wqe) {
		spin_lock_irqsave(&qp->s_lock, flags);
		hfi1_send_complete(qp, qp->s_wqe, wc_status);
		spin_unlock_irqrestore(&qp->s_lock, flags);
	} else if (qp->ibqp.qp_type == IB_QPT_RC) {
		spin_lock_irqsave(&qp->s_lock, flags);
1028
		hfi1_rc_send_complete(qp, &ps->s_txreq->phdr.hdr);
M
Mike Marciniszyn 已提交
1029 1030
		spin_unlock_irqrestore(&qp->s_lock, flags);
	}
1031 1032 1033 1034 1035 1036

	ret = 0;

bail:
	hfi1_put_txreq(ps->s_txreq);
	return ret;
M
Mike Marciniszyn 已提交
1037
}
1038

M
Mike Marciniszyn 已提交
1039 1040
/*
 * egress_pkey_matches_entry - return 1 if the pkey matches ent (ent
1041
 * being an entry from the partition key table), return 0
M
Mike Marciniszyn 已提交
1042 1043 1044 1045 1046 1047
 * otherwise. Use the matching criteria for egress partition keys
 * specified in the OPAv1 spec., section 9.1l.7.
 */
static inline int egress_pkey_matches_entry(u16 pkey, u16 ent)
{
	u16 mkey = pkey & PKEY_LOW_15_MASK;
1048
	u16 mentry = ent & PKEY_LOW_15_MASK;
M
Mike Marciniszyn 已提交
1049

1050
	if (mkey == mentry) {
M
Mike Marciniszyn 已提交
1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062
		/*
		 * If pkey[15] is set (full partition member),
		 * is bit 15 in the corresponding table element
		 * clear (limited member)?
		 */
		if (pkey & PKEY_MEMBER_MASK)
			return !!(ent & PKEY_MEMBER_MASK);
		return 1;
	}
	return 0;
}

1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075
/**
 * egress_pkey_check - check P_KEY of a packet
 * @ppd:    Physical IB port data
 * @lrh: Local route header
 * @bth: Base transport header
 * @sc5:    SC for packet
 * @s_pkey_index: It will be used for look up optimization for kernel contexts
 * only. If it is negative value, then it means user contexts is calling this
 * function.
 *
 * It checks if hdr's pkey is valid.
 *
 * Return: 0 on success, otherwise, 1
M
Mike Marciniszyn 已提交
1076
 */
1077 1078
int egress_pkey_check(struct hfi1_pportdata *ppd, __be16 *lrh, __be32 *bth,
		      u8 sc5, int8_t s_pkey_index)
M
Mike Marciniszyn 已提交
1079 1080
{
	struct hfi1_devdata *dd;
1081
	int i;
M
Mike Marciniszyn 已提交
1082
	u16 pkey;
1083
	int is_user_ctxt_mechanism = (s_pkey_index < 0);
M
Mike Marciniszyn 已提交
1084 1085 1086 1087

	if (!(ppd->part_enforce & HFI1_PART_ENFORCE_OUT))
		return 0;

1088
	pkey = (u16)be32_to_cpu(bth[0]);
M
Mike Marciniszyn 已提交
1089 1090 1091 1092 1093 1094 1095 1096 1097

	/* If SC15, pkey[0:14] must be 0x7fff */
	if ((sc5 == 0xf) && ((pkey & PKEY_LOW_15_MASK) != PKEY_LOW_15_MASK))
		goto bad;

	/* Is the pkey = 0x0, or 0x8000? */
	if ((pkey & PKEY_LOW_15_MASK) == 0)
		goto bad;

1098 1099 1100 1101 1102 1103 1104
	/*
	 * For the kernel contexts only, if a qp is passed into the function,
	 * the most likely matching pkey has index qp->s_pkey_index
	 */
	if (!is_user_ctxt_mechanism &&
	    egress_pkey_matches_entry(pkey, ppd->pkeys[s_pkey_index])) {
		return 0;
M
Mike Marciniszyn 已提交
1105 1106
	}

1107 1108 1109 1110
	for (i = 0; i < MAX_PKEY_VALUES; i++) {
		if (egress_pkey_matches_entry(pkey, ppd->pkeys[i]))
			return 0;
	}
M
Mike Marciniszyn 已提交
1111
bad:
1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128
	/*
	 * For the user-context mechanism, the P_KEY check would only happen
	 * once per SDMA request, not once per packet.  Therefore, there's no
	 * need to increment the counter for the user-context mechanism.
	 */
	if (!is_user_ctxt_mechanism) {
		incr_cntr64(&ppd->port_xmit_constraint_errors);
		dd = ppd->dd;
		if (!(dd->err_info_xmit_constraint.status &
		      OPA_EI_STATUS_SMASK)) {
			u16 slid = be16_to_cpu(lrh[3]);

			dd->err_info_xmit_constraint.status |=
				OPA_EI_STATUS_SMASK;
			dd->err_info_xmit_constraint.slid = slid;
			dd->err_info_xmit_constraint.pkey = pkey;
		}
M
Mike Marciniszyn 已提交
1129 1130 1131 1132
	}
	return 1;
}

1133 1134 1135 1136 1137 1138 1139
/**
 * get_send_routine - choose an egress routine
 *
 * Choose an egress routine based on QP type
 * and size
 */
static inline send_routine get_send_routine(struct rvt_qp *qp,
1140
					    struct verbs_txreq *tx)
1141 1142 1143
{
	struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
	struct hfi1_qp_priv *priv = qp->priv;
1144
	struct ib_header *h = &tx->phdr.hdr;
1145 1146 1147 1148 1149 1150 1151 1152 1153 1154

	if (unlikely(!(dd->flags & HFI1_HAS_SEND_DMA)))
		return dd->process_pio_send;
	switch (qp->ibqp.qp_type) {
	case IB_QPT_SMI:
		return dd->process_pio_send;
	case IB_QPT_GSI:
	case IB_QPT_UD:
		break;
	case IB_QPT_UC:
1155 1156 1157
	case IB_QPT_RC: {
		u8 op = get_opcode(h);

1158
		if (piothreshold &&
1159
		    tx->s_cur_size <= min(piothreshold, qp->pmtu) &&
1160
		    (BIT(op & OPMASK) & pio_opmask[op >> 5]) &&
1161 1162
		    iowait_sdma_pending(&priv->s_iowait) == 0 &&
		    !sdma_txreq_built(&tx->txreq))
1163 1164
			return dd->process_pio_send;
		break;
1165
	}
1166 1167 1168 1169 1170 1171
	default:
		break;
	}
	return dd->process_dma_send;
}

M
Mike Marciniszyn 已提交
1172 1173 1174
/**
 * hfi1_verbs_send - send a packet
 * @qp: the QP to send on
1175
 * @ps: the state of the packet to send
M
Mike Marciniszyn 已提交
1176 1177
 *
 * Return zero if packet is sent or queued OK.
1178
 * Return non-zero and clear qp->s_flags RVT_S_BUSY otherwise.
M
Mike Marciniszyn 已提交
1179
 */
1180
int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
M
Mike Marciniszyn 已提交
1181 1182
{
	struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
1183
	struct hfi1_qp_priv *priv = qp->priv;
1184 1185
	struct ib_other_headers *ohdr;
	struct ib_header *hdr;
1186
	send_routine sr;
M
Mike Marciniszyn 已提交
1187
	int ret;
1188 1189 1190 1191 1192 1193 1194 1195 1196
	u8 lnh;

	hdr = &ps->s_txreq->phdr.hdr;
	/* locate the pkey within the headers */
	lnh = be16_to_cpu(hdr->lrh[0]) & 3;
	if (lnh == HFI1_LRH_GRH)
		ohdr = &hdr->u.l.oth;
	else
		ohdr = &hdr->u.oth;
M
Mike Marciniszyn 已提交
1197

1198
	sr = get_send_routine(qp, ps->s_txreq);
1199 1200 1201 1202 1203
	ret = egress_pkey_check(dd->pport,
				hdr->lrh,
				ohdr->bth,
				priv->s_sc,
				qp->s_pkey_index);
M
Mike Marciniszyn 已提交
1204 1205 1206 1207 1208 1209 1210 1211 1212
	if (unlikely(ret)) {
		/*
		 * The value we are returning here does not get propagated to
		 * the verbs caller. Thus we need to complete the request with
		 * error otherwise the caller could be sitting waiting on the
		 * completion event. Only do this for PIO. SDMA has its own
		 * mechanism for handling the errors. So for SDMA we can just
		 * return.
		 */
1213 1214 1215
		if (sr == dd->process_pio_send) {
			unsigned long flags;

M
Mike Marciniszyn 已提交
1216 1217 1218 1219 1220 1221 1222 1223
			hfi1_cdbg(PIO, "%s() Failed. Completing with err",
				  __func__);
			spin_lock_irqsave(&qp->s_lock, flags);
			hfi1_send_complete(qp, qp->s_wqe, IB_WC_GENERAL_ERR);
			spin_unlock_irqrestore(&qp->s_lock, flags);
		}
		return -EINVAL;
	}
1224 1225 1226 1227 1228
	if (sr == dd->process_dma_send && iowait_pio_pending(&priv->s_iowait))
		return pio_wait(qp,
				ps->s_txreq->psc,
				ps,
				RVT_S_WAIT_PIO_DRAIN);
1229
	return sr(qp, ps, 0);
M
Mike Marciniszyn 已提交
1230 1231
}

1232 1233 1234 1235 1236
/**
 * hfi1_fill_device_attr - Fill in rvt dev info device attributes.
 * @dd: the device data structure
 */
static void hfi1_fill_device_attr(struct hfi1_devdata *dd)
M
Mike Marciniszyn 已提交
1237
{
1238
	struct rvt_dev_info *rdi = &dd->verbs_dev.rdi;
1239
	u16 ver = dd->dc8051_ver;
1240 1241 1242

	memset(&rdi->dparms.props, 0, sizeof(rdi->dparms.props));

1243 1244
	rdi->dparms.props.fw_ver = ((u64)(dc8051_ver_maj(ver)) << 16) |
				    (u64)dc8051_ver_min(ver);
1245 1246 1247
	rdi->dparms.props.device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR |
			IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT |
			IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_RC_RNR_NAK_GEN |
1248 1249
			IB_DEVICE_PORT_ACTIVE_EVENT | IB_DEVICE_SRQ_RESIZE |
			IB_DEVICE_MEM_MGT_EXTENSIONS;
1250 1251 1252 1253 1254
	rdi->dparms.props.page_size_cap = PAGE_SIZE;
	rdi->dparms.props.vendor_id = dd->oui1 << 16 | dd->oui2 << 8 | dd->oui3;
	rdi->dparms.props.vendor_part_id = dd->pcidev->device;
	rdi->dparms.props.hw_ver = dd->minrev;
	rdi->dparms.props.sys_image_guid = ib_hfi1_sys_image_guid;
1255 1256
	rdi->dparms.props.max_mr_size = U64_MAX;
	rdi->dparms.props.max_fast_reg_page_list_len = UINT_MAX;
1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279
	rdi->dparms.props.max_qp = hfi1_max_qps;
	rdi->dparms.props.max_qp_wr = hfi1_max_qp_wrs;
	rdi->dparms.props.max_sge = hfi1_max_sges;
	rdi->dparms.props.max_sge_rd = hfi1_max_sges;
	rdi->dparms.props.max_cq = hfi1_max_cqs;
	rdi->dparms.props.max_ah = hfi1_max_ahs;
	rdi->dparms.props.max_cqe = hfi1_max_cqes;
	rdi->dparms.props.max_mr = rdi->lkey_table.max;
	rdi->dparms.props.max_fmr = rdi->lkey_table.max;
	rdi->dparms.props.max_map_per_fmr = 32767;
	rdi->dparms.props.max_pd = hfi1_max_pds;
	rdi->dparms.props.max_qp_rd_atom = HFI1_MAX_RDMA_ATOMIC;
	rdi->dparms.props.max_qp_init_rd_atom = 255;
	rdi->dparms.props.max_srq = hfi1_max_srqs;
	rdi->dparms.props.max_srq_wr = hfi1_max_srq_wrs;
	rdi->dparms.props.max_srq_sge = hfi1_max_srq_sges;
	rdi->dparms.props.atomic_cap = IB_ATOMIC_GLOB;
	rdi->dparms.props.max_pkeys = hfi1_get_npkeys(dd);
	rdi->dparms.props.max_mcast_grp = hfi1_max_mcast_grps;
	rdi->dparms.props.max_mcast_qp_attach = hfi1_max_mcast_qp_attached;
	rdi->dparms.props.max_total_mcast_qp_attach =
					rdi->dparms.props.max_mcast_qp_attach *
					rdi->dparms.props.max_mcast_grp;
M
Mike Marciniszyn 已提交
1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312
}

static inline u16 opa_speed_to_ib(u16 in)
{
	u16 out = 0;

	if (in & OPA_LINK_SPEED_25G)
		out |= IB_SPEED_EDR;
	if (in & OPA_LINK_SPEED_12_5G)
		out |= IB_SPEED_FDR;

	return out;
}

/*
 * Convert a single OPA link width (no multiple flags) to an IB value.
 * A zero OPA link width means link down, which means the IB width value
 * is a don't care.
 */
static inline u16 opa_width_to_ib(u16 in)
{
	switch (in) {
	case OPA_LINK_WIDTH_1X:
	/* map 2x and 3x to 1x as they don't exist in IB */
	case OPA_LINK_WIDTH_2X:
	case OPA_LINK_WIDTH_3X:
		return IB_WIDTH_1X;
	default: /* link down or unknown, return our largest width */
	case OPA_LINK_WIDTH_4X:
		return IB_WIDTH_4X;
	}
}

1313
static int query_port(struct rvt_dev_info *rdi, u8 port_num,
M
Mike Marciniszyn 已提交
1314 1315
		      struct ib_port_attr *props)
{
1316 1317 1318
	struct hfi1_ibdev *verbs_dev = dev_from_rdi(rdi);
	struct hfi1_devdata *dd = dd_from_dev(verbs_dev);
	struct hfi1_pportdata *ppd = &dd->pport[port_num - 1];
M
Mike Marciniszyn 已提交
1319 1320
	u16 lid = ppd->lid;

1321
	/* props being zeroed by the caller, avoid zeroing it here */
M
Mike Marciniszyn 已提交
1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363
	props->lid = lid ? lid : 0;
	props->lmc = ppd->lmc;
	/* OPA logical states match IB logical states */
	props->state = driver_lstate(ppd);
	props->phys_state = hfi1_ibphys_portstate(ppd);
	props->gid_tbl_len = HFI1_GUIDS_PER_PORT;
	props->active_width = (u8)opa_width_to_ib(ppd->link_width_active);
	/* see rate_show() in ib core/sysfs.c */
	props->active_speed = (u8)opa_speed_to_ib(ppd->link_speed_active);
	props->max_vl_num = ppd->vls_supported;

	/* Once we are a "first class" citizen and have added the OPA MTUs to
	 * the core we can advertise the larger MTU enum to the ULPs, for now
	 * advertise only 4K.
	 *
	 * Those applications which are either OPA aware or pass the MTU enum
	 * from the Path Records to us will get the new 8k MTU.  Those that
	 * attempt to process the MTU enum may fail in various ways.
	 */
	props->max_mtu = mtu_to_enum((!valid_ib_mtu(hfi1_max_mtu) ?
				      4096 : hfi1_max_mtu), IB_MTU_4096);
	props->active_mtu = !valid_ib_mtu(ppd->ibmtu) ? props->max_mtu :
		mtu_to_enum(ppd->ibmtu, IB_MTU_2048);

	return 0;
}

static int modify_device(struct ib_device *device,
			 int device_modify_mask,
			 struct ib_device_modify *device_modify)
{
	struct hfi1_devdata *dd = dd_from_ibdev(device);
	unsigned i;
	int ret;

	if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
				   IB_DEVICE_MODIFY_NODE_DESC)) {
		ret = -EOPNOTSUPP;
		goto bail;
	}

	if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC) {
1364 1365
		memcpy(device->node_desc, device_modify->node_desc,
		       IB_DEVICE_NODE_DESC_MAX);
M
Mike Marciniszyn 已提交
1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388
		for (i = 0; i < dd->num_pports; i++) {
			struct hfi1_ibport *ibp = &dd->pport[i].ibport_data;

			hfi1_node_desc_chg(ibp);
		}
	}

	if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) {
		ib_hfi1_sys_image_guid =
			cpu_to_be64(device_modify->sys_image_guid);
		for (i = 0; i < dd->num_pports; i++) {
			struct hfi1_ibport *ibp = &dd->pport[i].ibport_data;

			hfi1_sys_guid_chg(ibp);
		}
	}

	ret = 0;

bail:
	return ret;
}

1389
static int shut_down_port(struct rvt_dev_info *rdi, u8 port_num)
M
Mike Marciniszyn 已提交
1390
{
1391 1392 1393 1394
	struct hfi1_ibdev *verbs_dev = dev_from_rdi(rdi);
	struct hfi1_devdata *dd = dd_from_dev(verbs_dev);
	struct hfi1_pportdata *ppd = &dd->pport[port_num - 1];
	int ret;
M
Mike Marciniszyn 已提交
1395

1396 1397 1398
	set_link_down_reason(ppd, OPA_LINKDOWN_REASON_UNKNOWN, 0,
			     OPA_LINKDOWN_REASON_UNKNOWN);
	ret = set_link_state(ppd, HLS_DN_DOWNDEF);
M
Mike Marciniszyn 已提交
1399 1400 1401
	return ret;
}

1402 1403
static int hfi1_get_guid_be(struct rvt_dev_info *rdi, struct rvt_ibport *rvp,
			    int guid_index, __be64 *guid)
M
Mike Marciniszyn 已提交
1404
{
1405
	struct hfi1_ibport *ibp = container_of(rvp, struct hfi1_ibport, rvp);
M
Mike Marciniszyn 已提交
1406

1407
	if (guid_index >= HFI1_GUIDS_PER_PORT)
1408
		return -EINVAL;
M
Mike Marciniszyn 已提交
1409

1410
	*guid = get_sguid(ibp, guid_index);
1411
	return 0;
M
Mike Marciniszyn 已提交
1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423
}

/*
 * convert ah port,sl to sc
 */
u8 ah_to_sc(struct ib_device *ibdev, struct ib_ah_attr *ah)
{
	struct hfi1_ibport *ibp = to_iport(ibdev, ah->port_num);

	return ibp->sl_to_sc[ah->sl];
}

1424
static int hfi1_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr)
M
Mike Marciniszyn 已提交
1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436
{
	struct hfi1_ibport *ibp;
	struct hfi1_pportdata *ppd;
	struct hfi1_devdata *dd;
	u8 sc5;

	/* test the mapping for validity */
	ibp = to_iport(ibdev, ah_attr->port_num);
	ppd = ppd_from_ibp(ibp);
	sc5 = ibp->sl_to_sc[ah_attr->sl];
	dd = dd_from_ppd(ppd);
	if (sc_to_vlt(dd, sc5) > num_vls && sc_to_vlt(dd, sc5) != 0xf)
1437
		return -EINVAL;
M
Mike Marciniszyn 已提交
1438 1439 1440
	return 0;
}

1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463
static void hfi1_notify_new_ah(struct ib_device *ibdev,
			       struct ib_ah_attr *ah_attr,
			       struct rvt_ah *ah)
{
	struct hfi1_ibport *ibp;
	struct hfi1_pportdata *ppd;
	struct hfi1_devdata *dd;
	u8 sc5;

	/*
	 * Do not trust reading anything from rvt_ah at this point as it is not
	 * done being setup. We can however modify things which we need to set.
	 */

	ibp = to_iport(ibdev, ah_attr->port_num);
	ppd = ppd_from_ibp(ibp);
	sc5 = ibp->sl_to_sc[ah->attr.sl];
	dd = dd_from_ppd(ppd);
	ah->vl = sc_to_vlt(dd, sc5);
	if (ah->vl < num_vls || ah->vl == 15)
		ah->log_pmtu = ilog2(dd->vld[ah->vl].mtu);
}

M
Mike Marciniszyn 已提交
1464 1465 1466 1467
struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u16 dlid)
{
	struct ib_ah_attr attr;
	struct ib_ah *ah = ERR_PTR(-EINVAL);
1468
	struct rvt_qp *qp0;
M
Mike Marciniszyn 已提交
1469 1470 1471 1472 1473

	memset(&attr, 0, sizeof(attr));
	attr.dlid = dlid;
	attr.port_num = ppd_from_ibp(ibp)->port;
	rcu_read_lock();
1474
	qp0 = rcu_dereference(ibp->rvp.qp[0]);
M
Mike Marciniszyn 已提交
1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500
	if (qp0)
		ah = ib_create_ah(qp0->ibqp.pd, &attr);
	rcu_read_unlock();
	return ah;
}

/**
 * hfi1_get_npkeys - return the size of the PKEY table for context 0
 * @dd: the hfi1_ib device
 */
unsigned hfi1_get_npkeys(struct hfi1_devdata *dd)
{
	return ARRAY_SIZE(dd->pport[0].pkeys);
}

static void init_ibport(struct hfi1_pportdata *ppd)
{
	struct hfi1_ibport *ibp = &ppd->ibport_data;
	size_t sz = ARRAY_SIZE(ibp->sl_to_sc);
	int i;

	for (i = 0; i < sz; i++) {
		ibp->sl_to_sc[i] = i;
		ibp->sc_to_sl[i] = i;
	}

1501
	spin_lock_init(&ibp->rvp.lock);
M
Mike Marciniszyn 已提交
1502
	/* Set the prefix to the default value (see ch. 4.1.1) */
1503 1504
	ibp->rvp.gid_prefix = IB_DEFAULT_GID_PREFIX;
	ibp->rvp.sm_lid = 0;
M
Mike Marciniszyn 已提交
1505
	/* Below should only set bits defined in OPA PortInfo.CapabilityMask */
1506
	ibp->rvp.port_cap_flags = IB_PORT_AUTO_MIGR_SUP |
M
Mike Marciniszyn 已提交
1507
		IB_PORT_CAP_MASK_NOTICE_SUP;
1508 1509 1510 1511 1512 1513 1514 1515
	ibp->rvp.pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA;
	ibp->rvp.pma_counter_select[1] = IB_PMA_PORT_RCV_DATA;
	ibp->rvp.pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS;
	ibp->rvp.pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS;
	ibp->rvp.pma_counter_select[4] = IB_PMA_PORT_XMIT_WAIT;

	RCU_INIT_POINTER(ibp->rvp.qp[0], NULL);
	RCU_INIT_POINTER(ibp->rvp.qp[1], NULL);
M
Mike Marciniszyn 已提交
1516 1517
}

1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528
static void hfi1_get_dev_fw_str(struct ib_device *ibdev, char *str,
				size_t str_len)
{
	struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
	struct hfi1_ibdev *dev = dev_from_rdi(rdi);
	u16 ver = dd_from_dev(dev)->dc8051_ver;

	snprintf(str, str_len, "%u.%u", dc8051_ver_maj(ver),
		 dc8051_ver_min(ver));
}

1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555
static const char * const driver_cntr_names[] = {
	/* must be element 0*/
	"DRIVER_KernIntr",
	"DRIVER_ErrorIntr",
	"DRIVER_Tx_Errs",
	"DRIVER_Rcv_Errs",
	"DRIVER_HW_Errs",
	"DRIVER_NoPIOBufs",
	"DRIVER_CtxtsOpen",
	"DRIVER_RcvLen_Errs",
	"DRIVER_EgrBufFull",
	"DRIVER_EgrHdrFull"
};

static const char **dev_cntr_names;
static const char **port_cntr_names;
static int num_driver_cntrs = ARRAY_SIZE(driver_cntr_names);
static int num_dev_cntrs;
static int num_port_cntrs;
static int cntr_names_initialized;

/*
 * Convert a list of names separated by '\n' into an array of NULL terminated
 * strings. Optionally some entries can be reserved in the array to hold extra
 * external strings.
 */
static int init_cntr_names(const char *names_in,
1556
			   const size_t names_len,
1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676
			   int num_extra_names,
			   int *num_cntrs,
			   const char ***cntr_names)
{
	char *names_out, *p, **q;
	int i, n;

	n = 0;
	for (i = 0; i < names_len; i++)
		if (names_in[i] == '\n')
			n++;

	names_out = kmalloc((n + num_extra_names) * sizeof(char *) + names_len,
			    GFP_KERNEL);
	if (!names_out) {
		*num_cntrs = 0;
		*cntr_names = NULL;
		return -ENOMEM;
	}

	p = names_out + (n + num_extra_names) * sizeof(char *);
	memcpy(p, names_in, names_len);

	q = (char **)names_out;
	for (i = 0; i < n; i++) {
		q[i] = p;
		p = strchr(p, '\n');
		*p++ = '\0';
	}

	*num_cntrs = n;
	*cntr_names = (const char **)names_out;
	return 0;
}

static struct rdma_hw_stats *alloc_hw_stats(struct ib_device *ibdev,
					    u8 port_num)
{
	int i, err;

	if (!cntr_names_initialized) {
		struct hfi1_devdata *dd = dd_from_ibdev(ibdev);

		err = init_cntr_names(dd->cntrnames,
				      dd->cntrnameslen,
				      num_driver_cntrs,
				      &num_dev_cntrs,
				      &dev_cntr_names);
		if (err)
			return NULL;

		for (i = 0; i < num_driver_cntrs; i++)
			dev_cntr_names[num_dev_cntrs + i] =
				driver_cntr_names[i];

		err = init_cntr_names(dd->portcntrnames,
				      dd->portcntrnameslen,
				      0,
				      &num_port_cntrs,
				      &port_cntr_names);
		if (err) {
			kfree(dev_cntr_names);
			dev_cntr_names = NULL;
			return NULL;
		}
		cntr_names_initialized = 1;
	}

	if (!port_num)
		return rdma_alloc_hw_stats_struct(
				dev_cntr_names,
				num_dev_cntrs + num_driver_cntrs,
				RDMA_HW_STATS_DEFAULT_LIFESPAN);
	else
		return rdma_alloc_hw_stats_struct(
				port_cntr_names,
				num_port_cntrs,
				RDMA_HW_STATS_DEFAULT_LIFESPAN);
}

static u64 hfi1_sps_ints(void)
{
	unsigned long flags;
	struct hfi1_devdata *dd;
	u64 sps_ints = 0;

	spin_lock_irqsave(&hfi1_devs_lock, flags);
	list_for_each_entry(dd, &hfi1_dev_list, list) {
		sps_ints += get_all_cpu_total(dd->int_counter);
	}
	spin_unlock_irqrestore(&hfi1_devs_lock, flags);
	return sps_ints;
}

static int get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats,
			u8 port, int index)
{
	u64 *values;
	int count;

	if (!port) {
		u64 *stats = (u64 *)&hfi1_stats;
		int i;

		hfi1_read_cntrs(dd_from_ibdev(ibdev), NULL, &values);
		values[num_dev_cntrs] = hfi1_sps_ints();
		for (i = 1; i < num_driver_cntrs; i++)
			values[num_dev_cntrs + i] = stats[i];
		count = num_dev_cntrs + num_driver_cntrs;
	} else {
		struct hfi1_ibport *ibp = to_iport(ibdev, port);

		hfi1_read_portcntrs(ppd_from_ibp(ibp), NULL, &values);
		count = num_port_cntrs;
	}

	memcpy(stats->value, values, count * sizeof(u64));
	return count;
}

M
Mike Marciniszyn 已提交
1677 1678 1679 1680 1681 1682 1683 1684
/**
 * hfi1_register_ib_device - register our device with the infiniband core
 * @dd: the device data structure
 * Return 0 if successful, errno if unsuccessful.
 */
int hfi1_register_ib_device(struct hfi1_devdata *dd)
{
	struct hfi1_ibdev *dev = &dd->verbs_dev;
1685
	struct ib_device *ibdev = &dev->rdi.ibdev;
M
Mike Marciniszyn 已提交
1686
	struct hfi1_pportdata *ppd = dd->pport;
1687
	struct hfi1_ibport *ibp = &ppd->ibport_data;
1688
	unsigned i;
M
Mike Marciniszyn 已提交
1689 1690 1691 1692 1693 1694 1695
	int ret;
	size_t lcpysz = IB_DEVICE_NAME_MAX;

	for (i = 0; i < dd->num_pports; i++)
		init_ibport(ppd + i);

	/* Only need to initialize non-zero fields. */
1696

1697
	setup_timer(&dev->mem_timer, mem_timer, (unsigned long)dev);
M
Mike Marciniszyn 已提交
1698 1699

	seqlock_init(&dev->iowait_lock);
1700
	seqlock_init(&dev->txwait_lock);
M
Mike Marciniszyn 已提交
1701 1702 1703
	INIT_LIST_HEAD(&dev->txwait);
	INIT_LIST_HEAD(&dev->memwait);

1704 1705
	ret = verbs_txreq_init(dev);
	if (ret)
M
Mike Marciniszyn 已提交
1706 1707
		goto err_verbs_txreq;

1708 1709 1710
	/* Use first-port GUID as node guid */
	ibdev->node_guid = get_sguid(ibp, HFI1_PORT_GUID_INDEX);

M
Mike Marciniszyn 已提交
1711 1712 1713 1714 1715 1716
	/*
	 * The system image GUID is supposed to be the same for all
	 * HFIs in a single system but since there can be other
	 * device types in the system, we can't be sure this is unique.
	 */
	if (!ib_hfi1_sys_image_guid)
1717
		ib_hfi1_sys_image_guid = ibdev->node_guid;
M
Mike Marciniszyn 已提交
1718 1719 1720 1721
	lcpysz = strlcpy(ibdev->name, class_name(), lcpysz);
	strlcpy(ibdev->name + lcpysz, "_%d", IB_DEVICE_NAME_MAX - lcpysz);
	ibdev->owner = THIS_MODULE;
	ibdev->phys_port_cnt = dd->num_pports;
1722
	ibdev->dev.parent = &dd->pcidev->dev;
M
Mike Marciniszyn 已提交
1723
	ibdev->modify_device = modify_device;
1724 1725
	ibdev->alloc_hw_stats = alloc_hw_stats;
	ibdev->get_hw_stats = get_hw_stats;
1726 1727

	/* keep process mad in the driver */
M
Mike Marciniszyn 已提交
1728
	ibdev->process_mad = hfi1_process_mad;
1729
	ibdev->get_dev_fw_str = hfi1_get_dev_fw_str;
M
Mike Marciniszyn 已提交
1730 1731 1732 1733

	strncpy(ibdev->node_desc, init_utsname()->nodename,
		sizeof(ibdev->node_desc));

1734 1735 1736 1737
	/*
	 * Fill in rvt info object.
	 */
	dd->verbs_dev.rdi.driver_f.port_callback = hfi1_create_port_files;
1738 1739
	dd->verbs_dev.rdi.driver_f.get_card_name = get_card_name;
	dd->verbs_dev.rdi.driver_f.get_pci_dev = get_pci_dev;
1740
	dd->verbs_dev.rdi.driver_f.check_ah = hfi1_check_ah;
1741
	dd->verbs_dev.rdi.driver_f.notify_new_ah = hfi1_notify_new_ah;
1742
	dd->verbs_dev.rdi.driver_f.get_guid_be = hfi1_get_guid_be;
1743 1744 1745
	dd->verbs_dev.rdi.driver_f.query_port_state = query_port;
	dd->verbs_dev.rdi.driver_f.shut_down_port = shut_down_port;
	dd->verbs_dev.rdi.driver_f.cap_mask_chg = hfi1_cap_mask_chg;
1746 1747 1748 1749
	/*
	 * Fill in rvt info device attributes.
	 */
	hfi1_fill_device_attr(dd);
1750 1751 1752 1753 1754 1755 1756 1757

	/* queue pair */
	dd->verbs_dev.rdi.dparms.qp_table_size = hfi1_qp_table_size;
	dd->verbs_dev.rdi.dparms.qpn_start = 0;
	dd->verbs_dev.rdi.dparms.qpn_inc = 1;
	dd->verbs_dev.rdi.dparms.qos_shift = dd->qos_shift;
	dd->verbs_dev.rdi.dparms.qpn_res_start = kdeth_qp << 16;
	dd->verbs_dev.rdi.dparms.qpn_res_end =
1758
	dd->verbs_dev.rdi.dparms.qpn_res_start + 65535;
1759 1760 1761 1762
	dd->verbs_dev.rdi.dparms.max_rdma_atomic = HFI1_MAX_RDMA_ATOMIC;
	dd->verbs_dev.rdi.dparms.psn_mask = PSN_MASK;
	dd->verbs_dev.rdi.dparms.psn_shift = PSN_SHIFT;
	dd->verbs_dev.rdi.dparms.psn_modify_mask = PSN_MODIFY_MASK;
1763 1764 1765
	dd->verbs_dev.rdi.dparms.core_cap_flags = RDMA_CORE_PORT_INTEL_OPA;
	dd->verbs_dev.rdi.dparms.max_mad_size = OPA_MGMT_MAD_SIZE;

1766 1767 1768 1769
	dd->verbs_dev.rdi.driver_f.qp_priv_alloc = qp_priv_alloc;
	dd->verbs_dev.rdi.driver_f.qp_priv_free = qp_priv_free;
	dd->verbs_dev.rdi.driver_f.free_all_qps = free_all_qps;
	dd->verbs_dev.rdi.driver_f.notify_qp_reset = notify_qp_reset;
1770 1771
	dd->verbs_dev.rdi.driver_f.do_send = hfi1_do_send;
	dd->verbs_dev.rdi.driver_f.schedule_send = hfi1_schedule_send;
1772
	dd->verbs_dev.rdi.driver_f.schedule_send_no_lock = _hfi1_schedule_send;
1773 1774 1775 1776 1777 1778 1779 1780 1781 1782
	dd->verbs_dev.rdi.driver_f.get_pmtu_from_attr = get_pmtu_from_attr;
	dd->verbs_dev.rdi.driver_f.notify_error_qp = notify_error_qp;
	dd->verbs_dev.rdi.driver_f.flush_qp_waiters = flush_qp_waiters;
	dd->verbs_dev.rdi.driver_f.stop_send_queue = stop_send_queue;
	dd->verbs_dev.rdi.driver_f.quiesce_qp = quiesce_qp;
	dd->verbs_dev.rdi.driver_f.notify_error_qp = notify_error_qp;
	dd->verbs_dev.rdi.driver_f.mtu_from_qp = mtu_from_qp;
	dd->verbs_dev.rdi.driver_f.mtu_to_path_mtu = mtu_to_path_mtu;
	dd->verbs_dev.rdi.driver_f.check_modify_qp = hfi1_check_modify_qp;
	dd->verbs_dev.rdi.driver_f.modify_qp = hfi1_modify_qp;
1783
	dd->verbs_dev.rdi.driver_f.notify_restart_rc = hfi1_restart_rc;
1784
	dd->verbs_dev.rdi.driver_f.check_send_wqe = hfi1_check_send_wqe;
1785

1786 1787 1788 1789
	/* completeion queue */
	snprintf(dd->verbs_dev.rdi.dparms.cq_name,
		 sizeof(dd->verbs_dev.rdi.dparms.cq_name),
		 "hfi1_cq%d", dd->unit);
1790
	dd->verbs_dev.rdi.dparms.node = dd->node;
1791

1792
	/* misc settings */
1793
	dd->verbs_dev.rdi.flags = 0; /* Let rdmavt handle it all */
1794
	dd->verbs_dev.rdi.dparms.lkey_table_size = hfi1_lkey_table_size;
1795 1796 1797
	dd->verbs_dev.rdi.dparms.nports = dd->num_pports;
	dd->verbs_dev.rdi.dparms.npkeys = hfi1_get_npkeys(dd);

1798 1799 1800
	/* post send table */
	dd->verbs_dev.rdi.post_parms = hfi1_post_parms;

1801 1802 1803 1804 1805 1806
	ppd = dd->pport;
	for (i = 0; i < dd->num_pports; i++, ppd++)
		rvt_init_port(&dd->verbs_dev.rdi,
			      &ppd->ibport_data.rvp,
			      i,
			      ppd->pkeys);
1807 1808

	ret = rvt_register_device(&dd->verbs_dev.rdi);
M
Mike Marciniszyn 已提交
1809
	if (ret)
1810
		goto err_verbs_txreq;
M
Mike Marciniszyn 已提交
1811 1812 1813 1814 1815

	ret = hfi1_verbs_register_sysfs(dd);
	if (ret)
		goto err_class;

1816
	return ret;
M
Mike Marciniszyn 已提交
1817 1818

err_class:
1819
	rvt_unregister_device(&dd->verbs_dev.rdi);
M
Mike Marciniszyn 已提交
1820
err_verbs_txreq:
1821
	verbs_txreq_exit(dev);
M
Mike Marciniszyn 已提交
1822 1823 1824 1825 1826 1827 1828 1829 1830 1831
	dd_dev_err(dd, "cannot register verbs: %d!\n", -ret);
	return ret;
}

void hfi1_unregister_ib_device(struct hfi1_devdata *dd)
{
	struct hfi1_ibdev *dev = &dd->verbs_dev;

	hfi1_verbs_unregister_sysfs(dd);

1832
	rvt_unregister_device(&dd->verbs_dev.rdi);
M
Mike Marciniszyn 已提交
1833 1834 1835 1836 1837 1838 1839

	if (!list_empty(&dev->txwait))
		dd_dev_err(dd, "txwait list not empty!\n");
	if (!list_empty(&dev->memwait))
		dd_dev_err(dd, "memwait list not empty!\n");

	del_timer_sync(&dev->mem_timer);
1840
	verbs_txreq_exit(dev);
1841 1842 1843 1844

	kfree(dev_cntr_names);
	kfree(port_cntr_names);
	cntr_names_initialized = 0;
M
Mike Marciniszyn 已提交
1845 1846 1847 1848
}

void hfi1_cnp_rcv(struct hfi1_packet *packet)
{
1849
	struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd);
1850
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
1851
	struct ib_header *hdr = packet->hdr;
1852
	struct rvt_qp *qp = packet->qp;
1853 1854
	u32 lqpn, rqpn = 0;
	u16 rlid = 0;
1855
	u8 sl, sc5, svc_type;
1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873

	switch (packet->qp->ibqp.qp_type) {
	case IB_QPT_UC:
		rlid = qp->remote_ah_attr.dlid;
		rqpn = qp->remote_qpn;
		svc_type = IB_CC_SVCTYPE_UC;
		break;
	case IB_QPT_RC:
		rlid = qp->remote_ah_attr.dlid;
		rqpn = qp->remote_qpn;
		svc_type = IB_CC_SVCTYPE_RC;
		break;
	case IB_QPT_SMI:
	case IB_QPT_GSI:
	case IB_QPT_UD:
		svc_type = IB_CC_SVCTYPE_UD;
		break;
	default:
1874
		ibp->rvp.n_pkt_drops++;
1875 1876 1877
		return;
	}

1878
	sc5 = hdr2sc(hdr, packet->rhf);
1879 1880 1881 1882
	sl = ibp->sc_to_sl[sc5];
	lqpn = qp->ibqp.qp_num;

	process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
M
Mike Marciniszyn 已提交
1883
}