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[MASTER]

# Specify a configuration file.
#rcfile=

# Python code to execute, usually for sys.path manipulation such as
# pygtk.require().
#init-hook=

# Profiled execution.
profile=no

# Add files or directories to the blacklist. They should be base names, not
# paths.
ignore=CVS, conf.py

# Pickle collected data for later comparisons.
persistent=yes

# List of plugins (as comma separated values of python modules names) to load,
# usually to register additional checkers.
load-plugins=

# A comma-separated list of package or module names from where C extensions may
# be loaded. Extensions are loading into the active Python interpreter and may
# run arbitrary code
extension-pkg-whitelist=numpy, scipy

[MESSAGES CONTROL]

# Enable the message, report, category or checker with the given id(s). You can
# either give multiple identifier separated by comma (,) or put this option
# multiple time. See also the "--disable" option for examples.
#enable=

# Disable the message, report, category or checker with the given id(s). You
# can either give multiple identifiers separated by comma (,) or put this
# option multiple times (only on the command line, not in the configuration
# file where it should appear only once).You can also use "--disable=all" to
# disable everything first and then reenable specific checks. For example, if
# you want to run only the similarities checker, you can use "--disable=all
# --enable=similarities". If you want to run only the classes checker, but have
# no Warning level messages displayed, use"--disable=all --enable=classes
# --disable=W"
#disable=redefined-variable-type, locally-disabled, locally-enabled

# TODO: Add explanation when disabling an id, either locally or globally.

[REPORTS]

# Set the output format. Available formats are text, parseable, colorized, msvs
# (visual studio) and html. You can also give a reporter class, eg
# mypackage.mymodule.MyReporterClass.
output-format=parseable

# Put messages in a separate file for each module / package specified on the
# command line instead of printing them on stdout. Reports (if any) will be
# written in a file name "pylint_global.[txt|html]".
files-output=no

# Tells whether to display a full report or only the messages
reports=yes

# Python expression which should return a note less than 10 (10 is the highest
# note). You have access to the variables errors warning, statement which
# respectively contain the number of errors / warnings messages and the total
# number of statements analyzed. This is used by the global evaluation report
# (RP0004).
evaluation=10.0 - ((float(5 * error + warning + refactor + convention) / statement) * 10)

# Add a comment according to your evaluation note. This is used by the global
# evaluation report (RP0004).
comment=no

# Template used to display messages. This is a python new-style format string
# used to format the message information. See doc for all details
#msg-template=


[FORMAT]

# Maximum number of characters on a single line.
max-line-length=80

# Regexp for a line that is allowed to be longer than the limit.
ignore-long-lines=^\s*(# )?<?https?://\S+>?$

# Allow the body of an if to be on the same line as the test if there is no
# else.
single-line-if-stmt=no

# List of optional constructs for which whitespace checking is disabled
no-space-check=trailing-comma,dict-separator

# Maximum number of lines in a module
max-module-lines=2000

# String used as indentation unit. This is usually " " (4 spaces) or "\t" (1
# tab).
indent-string='    '


[VARIABLES]

# Tells whether we should check for unused import in __init__ files.
init-import=no

# A regular expression matching the beginning of the name of dummy variables
# (i.e. not used).
dummy-variables-rgx=_$|dummy

# List of additional names supposed to be defined in builtins. Remember that
# you should avoid to define new builtins when possible.
additional-builtins=


[SIMILARITIES]

# Minimum lines number of a similarity.
min-similarity-lines=14

# Ignore comments when computing similarities.
ignore-comments=yes

# Ignore docstrings when computing similarities.
ignore-docstrings=no

# Ignore imports when computing similarities.
ignore-imports=no


[BASIC]

# Required attributes for module, separated by a comma
required-attributes=

# List of builtins function names that should not be used, separated by a comma
bad-functions=map,filter,apply,input

# Regular expression which should only match correct module names
module-rgx=(([a-z_][a-z0-9_]*)|([A-Z][a-zA-Z0-9]+))$

# Regular expression which should only match correct module level names
const-rgx=(([A-Z_][A-Z0-9_]*)|(__.*__))$

# Regular expression which should only match correct class names
class-rgx=[A-Z_][a-zA-Z0-9]+$

# Regular expression which should only match correct function names
function-rgx=[a-z_][a-z0-9_]{2,30}$

# Regular expression which should only match correct method names
method-rgx=[a-z_][a-z0-9_]{2,50}$

# Regular expression which should only match correct instance attribute names
attr-rgx=[a-z_][a-z0-9_]{2,30}$

# Regular expression which should only match correct argument names
argument-rgx=[a-z_][a-z0-9_]{2,30}$

# Regular expression which should only match correct variable names
variable-rgx=[a-z_][a-z0-9_]{2,30}$

# Regular expression which should only match correct attribute names in class
# bodies
class-attribute-rgx=([A-Za-z_][A-Za-z0-9_]{2,30}|(__.*__))$

# Regular expression which should only match correct list comprehension /
# generator expression variable names
inlinevar-rgx=[A-Za-z_][A-Za-z0-9_]*$

# Good variable names which should always be accepted, separated by a comma
good-names=i,j,k,ex,Run,_

# Bad variable names which should always be refused, separated by a comma
bad-names=foo,bar,baz,toto,tutu,tata

# Regular expression which should only match function or class names that do
# not require a docstring.
no-docstring-rgx=__.*__

# Minimum line length for functions/classes that require docstrings, shorter
# ones are exempt.
docstring-min-length=-1


[MISCELLANEOUS]

# List of note tags to take in consideration, separated by a comma.
notes=FIXME


[TYPECHECK]

# Tells whether missing members accessed in mixin class should be ignored. A
# mixin class is detected if its name ends with "mixin" (case insensitive).
ignore-mixin-members=yes

# List of classes names for which member attributes should not be checked
# (useful for classes with attributes dynamically set).
ignored-classes=SQLObject

# When zope mode is activated, add a predefined set of Zope acquired attributes
# to generated-members.
zope=no

# List of members which are set dynamically and missed by pylint inference
# system, and so shouldn't trigger E0201 when accessed. Python regular
# expressions are accepted.
generated-members=REQUEST,acl_users,aq_parent


[CLASSES]

# List of interface methods to ignore, separated by a comma. This is used for
# instance to not check methods defines in Zope's Interface base class.
ignore-iface-methods=isImplementedBy,deferred,extends,names,namesAndDescriptions,queryDescriptionFor,getBases,getDescriptionFor,getDoc,getName,getTaggedValue,getTaggedValueTags,isEqualOrExtendedBy,setTaggedValue,isImplementedByInstancesOf,adaptWith,is_implemented_by

# List of method names used to declare (i.e. assign) instance attributes.
defining-attr-methods=__init__,__new__,setUp

# List of valid names for the first argument in a class method.
valid-classmethod-first-arg=cls

# List of valid names for the first argument in a metaclass class method.
valid-metaclass-classmethod-first-arg=mcs


[IMPORTS]

# Deprecated modules which should not be used, separated by a comma
deprecated-modules=regsub,TERMIOS,Bastion,rexec

# Create a graph of every (i.e. internal and external) dependencies in the
# given file (report RP0402 must not be disabled)
import-graph=

# Create a graph of external dependencies in the given file (report RP0402 must
# not be disabled)
ext-import-graph=

# Create a graph of internal dependencies in the given file (report RP0402 must
# not be disabled)
int-import-graph=


[DESIGN]

# Maximum number of arguments for function / method
max-args=12

# Argument names that match this expression will be ignored. Default to name
# with leading underscore
ignored-argument-names=_.*

# Maximum number of locals for function / method body
max-locals=20

# Maximum number of return / yield for function / method body
max-returns=6

# Maximum number of branch for function / method body
max-branches=20

# Maximum number of statements in function / method body
max-statements=60

# Maximum number of parents for a class (see R0901).
max-parents=7

# Maximum number of attributes for a class (see R0902).
max-attributes=10

# Minimum number of public methods for a class (see R0903).
min-public-methods=0

# Maximum number of public methods for a class (see R0904).
max-public-methods=60


[EXCEPTIONS]

# Exceptions that will emit a warning when being caught. Defaults to
# "Exception"
overgeneral-exceptions=Exception


[LOGGING]

# Format style used to check logging format string. `old` means using %
# formatting, while `new` is for `{}` formatting.
logging-format-style=fstr
id='n1234' href='#n1234'>1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 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 1313 1314 1315 1316 1317 1318 1319 1320 1321 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 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459
/*
 *------------------------------------------------------------------
 * Copyright (c) 2018 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *------------------------------------------------------------------
 */

#include <vlib/vlib.h>
#include <vppinfra/ring.h>
#include <vlib/unix/unix.h>
#include <vlib/pci/pci.h>
#include <vnet/ethernet/ethernet.h>

#include <avf/avf.h>

#define AVF_MBOX_LEN 64
#define AVF_MBOX_BUF_SZ 512
#define AVF_RXQ_SZ 512
#define AVF_TXQ_SZ 512
#define AVF_ITR_INT 8160

#define PCI_VENDOR_ID_INTEL			0x8086
#define PCI_DEVICE_ID_INTEL_AVF			0x1889
#define PCI_DEVICE_ID_INTEL_X710_VF		0x154c
#define PCI_DEVICE_ID_INTEL_X722_VF		0x37cd

avf_main_t avf_main;

static pci_device_id_t avf_pci_device_ids[] = {
  {.vendor_id = PCI_VENDOR_ID_INTEL,.device_id = PCI_DEVICE_ID_INTEL_AVF},
  {.vendor_id = PCI_VENDOR_ID_INTEL,.device_id = PCI_DEVICE_ID_INTEL_X710_VF},
  {.vendor_id = PCI_VENDOR_ID_INTEL,.device_id = PCI_DEVICE_ID_INTEL_X722_VF},
  {0},
};

static inline void
avf_irq_0_disable (avf_device_t * ad)
{
  u32 dyn_ctl0 = 0, icr0_ena = 0;

  dyn_ctl0 |= (3 << 3);		/* 11b = No ITR update */

  avf_reg_write (ad, AVFINT_ICR0_ENA1, icr0_ena);
  avf_reg_write (ad, AVFINT_DYN_CTL0, dyn_ctl0);
  avf_reg_flush (ad);
}

static inline void
avf_irq_0_enable (avf_device_t * ad)
{
  u32 dyn_ctl0 = 0, icr0_ena = 0;

  icr0_ena |= (1 << 30);	/* [30] Admin Queue Enable */

  dyn_ctl0 |= (1 << 0);		/* [0] Interrupt Enable */
  dyn_ctl0 |= (1 << 1);		/* [1] Clear PBA */
  //dyn_ctl0 |= (3 << 3);               /* [4:3] ITR Index, 11b = No ITR update */
  dyn_ctl0 |= ((AVF_ITR_INT / 2) << 5);	/* [16:5] ITR Interval in 2us steps */

  avf_irq_0_disable (ad);
  avf_reg_write (ad, AVFINT_ICR0_ENA1, icr0_ena);
  avf_reg_write (ad, AVFINT_DYN_CTL0, dyn_ctl0);
  avf_reg_flush (ad);
}

static inline void
avf_irq_n_disable (avf_device_t * ad, u8 line)
{
  u32 dyn_ctln = 0;

  avf_reg_write (ad, AVFINT_DYN_CTLN (line), dyn_ctln);
  avf_reg_flush (ad);
}

static inline void
avf_irq_n_enable (avf_device_t * ad, u8 line)
{
  u32 dyn_ctln = 0;

  dyn_ctln |= (1 << 0);		/* [0] Interrupt Enable */
  dyn_ctln |= (1 << 1);		/* [1] Clear PBA */
  dyn_ctln |= ((AVF_ITR_INT / 2) << 5);	/* [16:5] ITR Interval in 2us steps */

  avf_irq_n_disable (ad, line);
  avf_reg_write (ad, AVFINT_DYN_CTLN (line), dyn_ctln);
  avf_reg_flush (ad);
}


clib_error_t *
avf_aq_desc_enq (vlib_main_t * vm, avf_device_t * ad, avf_aq_desc_t * dt,
		 void *data, int len)
{
  avf_main_t *am = &avf_main;
  clib_error_t *err = 0;
  avf_aq_desc_t *d, dc;
  int n_retry = 5;

  d = &ad->atq[ad->atq_next_slot];
  clib_memcpy_fast (d, dt, sizeof (avf_aq_desc_t));
  d->flags |= AVF_AQ_F_RD | AVF_AQ_F_SI;
  if (len)
    d->datalen = len;
  if (len)
    {
      u64 pa;
      pa = ad->atq_bufs_pa + ad->atq_next_slot * AVF_MBOX_BUF_SZ;
      d->addr_hi = (u32) (pa >> 32);
      d->addr_lo = (u32) pa;
      clib_memcpy_fast (ad->atq_bufs + ad->atq_next_slot * AVF_MBOX_BUF_SZ,
			data, len);
      d->flags |= AVF_AQ_F_BUF;
    }

  if (ad->flags & AVF_DEVICE_F_ELOG)
    clib_memcpy_fast (&dc, d, sizeof (avf_aq_desc_t));

  CLIB_MEMORY_BARRIER ();
  vlib_log_debug (am->log_class, "%U", format_hexdump, data, len);
  ad->atq_next_slot = (ad->atq_next_slot + 1) % AVF_MBOX_LEN;
  avf_reg_write (ad, AVF_ATQT, ad->atq_next_slot);
  avf_reg_flush (ad);

retry:
  vlib_process_suspend (vm, 10e-6);

  if (((d->flags & AVF_AQ_F_DD) == 0) || ((d->flags & AVF_AQ_F_CMP) == 0))
    {
      if (--n_retry == 0)
	{
	  err = clib_error_return (0, "adminq enqueue timeout [opcode 0x%x]",
				   d->opcode);
	  goto done;
	}
      goto retry;
    }

  clib_memcpy_fast (dt, d, sizeof (avf_aq_desc_t));
  if (d->flags & AVF_AQ_F_ERR)
    return clib_error_return (0, "adminq enqueue error [opcode 0x%x, retval "
			      "%d]", d->opcode, d->retval);

done:
  if (ad->flags & AVF_DEVICE_F_ELOG)
    {
      /* *INDENT-OFF* */
      ELOG_TYPE_DECLARE (el) =
	{
	  .format = "avf[%d] aq enq: s_flags 0x%x r_flags 0x%x opcode 0x%x "
	    "datalen %d retval %d",
	  .format_args = "i4i2i2i2i2i2",
	};
      struct
	{
	  u32 dev_instance;
	  u16 s_flags;
	  u16 r_flags;
	  u16 opcode;
	  u16 datalen;
	  u16 retval;
	} *ed;
      ed = ELOG_DATA (&vm->elog_main, el);
      ed->dev_instance = ad->dev_instance;
      ed->s_flags = dc.flags;
      ed->r_flags = d->flags;
      ed->opcode = dc.opcode;
      ed->datalen = dc.datalen;
      ed->retval = d->retval;
      /* *INDENT-ON* */
    }

  return err;
}

clib_error_t *
avf_cmd_rx_ctl_reg_write (vlib_main_t * vm, avf_device_t * ad, u32 reg,
			  u32 val)
{
  clib_error_t *err;
  avf_aq_desc_t d = {.opcode = 0x207,.param1 = reg,.param3 = val };
  err = avf_aq_desc_enq (vm, ad, &d, 0, 0);

  if (ad->flags & AVF_DEVICE_F_ELOG)
    {
      /* *INDENT-OFF* */
      ELOG_TYPE_DECLARE (el) =
	{
	  .format = "avf[%d] rx ctl reg write: reg 0x%x val 0x%x ",
	  .format_args = "i4i4i4",
	};
      struct
	{
	  u32 dev_instance;
	  u32 reg;
	  u32 val;
	} *ed;
      ed = ELOG_DATA (&vm->elog_main, el);
      ed->dev_instance = ad->dev_instance;
      ed->reg = reg;
      ed->val = val;
      /* *INDENT-ON* */
    }
  return err;
}

clib_error_t *
avf_rxq_init (vlib_main_t * vm, avf_device_t * ad, u16 qid, u16 rxq_size)
{
  clib_error_t *err;
  avf_rxq_t *rxq;
  u32 n_alloc, i;

  vec_validate_aligned (ad->rxqs, qid, CLIB_CACHE_LINE_BYTES);
  rxq = vec_elt_at_index (ad->rxqs, qid);
  rxq->size = rxq_size;
  rxq->next = 0;
  rxq->descs = vlib_physmem_alloc_aligned_on_numa (vm, rxq->size *
						   sizeof (avf_rx_desc_t),
						   2 * CLIB_CACHE_LINE_BYTES,
						   ad->numa_node);

  rxq->buffer_pool_index =
    vlib_buffer_pool_get_default_for_numa (vm, ad->numa_node);

  if (rxq->descs == 0)
    return vlib_physmem_last_error (vm);

  if ((err = vlib_pci_map_dma (vm, ad->pci_dev_handle, (void *) rxq->descs)))
    return err;

  clib_memset ((void *) rxq->descs, 0, rxq->size * sizeof (avf_rx_desc_t));
  vec_validate_aligned (rxq->bufs, rxq->size, CLIB_CACHE_LINE_BYTES);
  rxq->qrx_tail = ad->bar0 + AVF_QRX_TAIL (qid);

  n_alloc = vlib_buffer_alloc_from_pool (vm, rxq->bufs, rxq->size - 8,
					 rxq->buffer_pool_index);

  if (n_alloc == 0)
    return clib_error_return (0, "buffer allocation error");

  rxq->n_enqueued = n_alloc;
  avf_rx_desc_t *d = rxq->descs;
  for (i = 0; i < n_alloc; i++)
    {
      vlib_buffer_t *b = vlib_get_buffer (vm, rxq->bufs[i]);
      if (ad->flags & AVF_DEVICE_F_VA_DMA)
	d->qword[0] = vlib_buffer_get_va (b);
      else
	d->qword[0] = vlib_buffer_get_pa (vm, b);
      d++;
    }

  ad->n_rx_queues = clib_min (ad->num_queue_pairs, qid + 1);
  return 0;
}

clib_error_t *
avf_txq_init (vlib_main_t * vm, avf_device_t * ad, u16 qid, u16 txq_size)
{
  clib_error_t *err;
  avf_txq_t *txq;

  if (qid >= ad->num_queue_pairs)
    {
      qid = qid % ad->num_queue_pairs;
      txq = vec_elt_at_index (ad->txqs, qid);
      if (txq->lock == 0)
	clib_spinlock_init (&txq->lock);
      ad->flags |= AVF_DEVICE_F_SHARED_TXQ_LOCK;
      return 0;
    }

  vec_validate_aligned (ad->txqs, qid, CLIB_CACHE_LINE_BYTES);
  txq = vec_elt_at_index (ad->txqs, qid);
  txq->size = txq_size;
  txq->next = 0;
  txq->descs = vlib_physmem_alloc_aligned_on_numa (vm, txq->size *
						   sizeof (avf_tx_desc_t),
						   2 * CLIB_CACHE_LINE_BYTES,
						   ad->numa_node);
  if (txq->descs == 0)
    return vlib_physmem_last_error (vm);

  if ((err = vlib_pci_map_dma (vm, ad->pci_dev_handle, (void *) txq->descs)))
    return err;

  vec_validate_aligned (txq->bufs, txq->size, CLIB_CACHE_LINE_BYTES);
  txq->qtx_tail = ad->bar0 + AVF_QTX_TAIL (qid);

  /* initialize ring of pending RS slots */
  clib_ring_new_aligned (txq->rs_slots, 32, CLIB_CACHE_LINE_BYTES);

  ad->n_tx_queues = clib_min (ad->num_queue_pairs, qid + 1);
  return 0;
}

typedef struct
{
  u16 vsi_id;
  u16 flags;
} virtchnl_promisc_info_t;

void
avf_arq_slot_init (avf_device_t * ad, u16 slot)
{
  avf_aq_desc_t *d;
  u64 pa = ad->arq_bufs_pa + slot * AVF_MBOX_BUF_SZ;
  d = &ad->arq[slot];
  clib_memset (d, 0, sizeof (avf_aq_desc_t));
  d->flags = AVF_AQ_F_BUF;
  d->datalen = AVF_MBOX_BUF_SZ;
  d->addr_hi = (u32) (pa >> 32);
  d->addr_lo = (u32) pa;
}

static inline uword
avf_dma_addr (vlib_main_t * vm, avf_device_t * ad, void *p)
{
  return (ad->flags & AVF_DEVICE_F_VA_DMA) ?
    pointer_to_uword (p) : vlib_physmem_get_pa (vm, p);
}

static void
avf_adminq_init (vlib_main_t * vm, avf_device_t * ad)
{
  u64 pa;
  int i;

  /* VF MailBox Transmit */
  clib_memset (ad->atq, 0, sizeof (avf_aq_desc_t) * AVF_MBOX_LEN);
  ad->atq_bufs_pa = avf_dma_addr (vm, ad, ad->atq_bufs);

  pa = avf_dma_addr (vm, ad, ad->atq);
  avf_reg_write (ad, AVF_ATQT, 0);	/* Tail */
  avf_reg_write (ad, AVF_ATQH, 0);	/* Head */
  avf_reg_write (ad, AVF_ATQLEN, AVF_MBOX_LEN | (1ULL << 31));	/* len & ena */
  avf_reg_write (ad, AVF_ATQBAL, (u32) pa);	/* Base Address Low */
  avf_reg_write (ad, AVF_ATQBAH, (u32) (pa >> 32));	/* Base Address High */

  /* VF MailBox Receive */
  clib_memset (ad->arq, 0, sizeof (avf_aq_desc_t) * AVF_MBOX_LEN);
  ad->arq_bufs_pa = avf_dma_addr (vm, ad, ad->arq_bufs);

  for (i = 0; i < AVF_MBOX_LEN; i++)
    avf_arq_slot_init (ad, i);

  pa = avf_dma_addr (vm, ad, ad->arq);

  avf_reg_write (ad, AVF_ARQH, 0);	/* Head */
  avf_reg_write (ad, AVF_ARQT, 0);	/* Head */
  avf_reg_write (ad, AVF_ARQLEN, AVF_MBOX_LEN | (1ULL << 31));	/* len & ena */
  avf_reg_write (ad, AVF_ARQBAL, (u32) pa);	/* Base Address Low */
  avf_reg_write (ad, AVF_ARQBAH, (u32) (pa >> 32));	/* Base Address High */
  avf_reg_write (ad, AVF_ARQT, AVF_MBOX_LEN - 1);	/* Tail */

  ad->atq_next_slot = 0;
  ad->arq_next_slot = 0;
}

clib_error_t *
avf_send_to_pf (vlib_main_t * vm, avf_device_t * ad, virtchnl_ops_t op,
		void *in, int in_len, void *out, int out_len)
{
  clib_error_t *err;
  avf_aq_desc_t *d, dt = {.opcode = 0x801,.v_opcode = op };
  u32 head;
  int n_retry = 5;


  /* supppres interrupt in the next adminq receive slot
     as we are going to wait for response
     we only need interrupts when event is received */
  d = &ad->arq[ad->arq_next_slot];
  d->flags |= AVF_AQ_F_SI;

  if ((err = avf_aq_desc_enq (vm, ad, &dt, in, in_len)))
    return err;

retry:
  head = avf_get_u32 (ad->bar0, AVF_ARQH);

  if (ad->arq_next_slot == head)
    {
      if (--n_retry == 0)
	return clib_error_return (0, "timeout");
      vlib_process_suspend (vm, 10e-3);
      goto retry;
    }

  d = &ad->arq[ad->arq_next_slot];

  if (d->v_opcode == VIRTCHNL_OP_EVENT)
    {
      void *buf = ad->arq_bufs + ad->arq_next_slot * AVF_MBOX_BUF_SZ;
      virtchnl_pf_event_t *e;

      if ((d->datalen != sizeof (virtchnl_pf_event_t)) ||
	  ((d->flags & AVF_AQ_F_BUF) == 0))
	return clib_error_return (0, "event message error");

      vec_add2 (ad->events, e, 1);
      clib_memcpy_fast (e, buf, sizeof (virtchnl_pf_event_t));
      avf_arq_slot_init (ad, ad->arq_next_slot);
      ad->arq_next_slot++;
      n_retry = 5;
      goto retry;
    }

  if (d->v_opcode != op)
    {
      err =
	clib_error_return (0,
			   "unexpected message receiver [v_opcode = %u, "
			   "expected %u, v_retval %d]", d->v_opcode, op,
			   d->v_retval);
      goto done;
    }

  if (d->v_retval)
    {
      err = clib_error_return (0, "error [v_opcode = %u, v_retval %d]",
			       d->v_opcode, d->v_retval);
      goto done;
    }

  if (d->flags & AVF_AQ_F_BUF)
    {
      void *buf = ad->arq_bufs + ad->arq_next_slot * AVF_MBOX_BUF_SZ;
      clib_memcpy_fast (out, buf, out_len);
    }

  avf_arq_slot_init (ad, ad->arq_next_slot);
  avf_reg_write (ad, AVF_ARQT, ad->arq_next_slot);
  avf_reg_flush (ad);
  ad->arq_next_slot = (ad->arq_next_slot + 1) % AVF_MBOX_LEN;

done:

  if (ad->flags & AVF_DEVICE_F_ELOG)
    {
      /* *INDENT-OFF* */
      ELOG_TYPE_DECLARE (el) =
	{
	  .format = "avf[%d] send to pf: v_opcode %s (%d) v_retval 0x%x",
	  .format_args = "i4t4i4i4",
	  .n_enum_strings = VIRTCHNL_N_OPS,
	  .enum_strings = {
#define _(v, n) [v] = #n,
	      foreach_virtchnl_op
#undef _
	  },
	};
      struct
	{
	  u32 dev_instance;
	  u32 v_opcode;
	  u32 v_opcode_val;
	  u32 v_retval;
	} *ed;
      ed = ELOG_DATA (&vm->elog_main, el);
      ed->dev_instance = ad->dev_instance;
      ed->v_opcode = op;
      ed->v_opcode_val = op;
      ed->v_retval = d->v_retval;
      /* *INDENT-ON* */
    }
  return err;
}

clib_error_t *
avf_op_version (vlib_main_t * vm, avf_device_t * ad,
		virtchnl_version_info_t * ver)
{
  clib_error_t *err = 0;
  virtchnl_version_info_t myver = {
    .major = VIRTCHNL_VERSION_MAJOR,
    .minor = VIRTCHNL_VERSION_MINOR,
  };

  err = avf_send_to_pf (vm, ad, VIRTCHNL_OP_VERSION, &myver,
			sizeof (virtchnl_version_info_t), ver,
			sizeof (virtchnl_version_info_t));

  if (err)
    return err;

  return err;
}

clib_error_t *
avf_op_get_vf_resources (vlib_main_t * vm, avf_device_t * ad,
			 virtchnl_vf_resource_t * res)
{
  u32 bitmap = (VIRTCHNL_VF_OFFLOAD_L2 | VIRTCHNL_VF_OFFLOAD_RSS_PF |
		VIRTCHNL_VF_OFFLOAD_WB_ON_ITR | VIRTCHNL_VF_OFFLOAD_VLAN |
		VIRTCHNL_VF_OFFLOAD_RX_POLLING);

  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_GET_VF_RESOURCES, &bitmap,
			 sizeof (u32), res, sizeof (virtchnl_vf_resource_t));
}

clib_error_t *
avf_op_config_rss_lut (vlib_main_t * vm, avf_device_t * ad)
{
  int msg_len = sizeof (virtchnl_rss_lut_t) + ad->rss_lut_size - 1;
  int i;
  u8 msg[msg_len];
  virtchnl_rss_lut_t *rl;

  clib_memset (msg, 0, msg_len);
  rl = (virtchnl_rss_lut_t *) msg;
  rl->vsi_id = ad->vsi_id;
  rl->lut_entries = ad->rss_lut_size;
  for (i = 0; i < ad->rss_lut_size; i++)
    rl->lut[i] = i % ad->n_rx_queues;

  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_CONFIG_RSS_LUT, msg, msg_len, 0,
			 0);
}

clib_error_t *
avf_op_config_rss_key (vlib_main_t * vm, avf_device_t * ad)
{
  int msg_len = sizeof (virtchnl_rss_key_t) + ad->rss_key_size - 1;
  int i;
  u8 msg[msg_len];
  virtchnl_rss_key_t *rk;

  clib_memset (msg, 0, msg_len);
  rk = (virtchnl_rss_key_t *) msg;
  rk->vsi_id = ad->vsi_id;
  rk->key_len = ad->rss_key_size;
  u32 seed = random_default_seed ();
  for (i = 0; i < ad->rss_key_size; i++)
    rk->key[i] = (u8) random_u32 (&seed);

  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_CONFIG_RSS_KEY, msg, msg_len, 0,
			 0);
}

clib_error_t *
avf_op_disable_vlan_stripping (vlib_main_t * vm, avf_device_t * ad)
{
  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_DISABLE_VLAN_STRIPPING, 0, 0, 0,
			 0);
}

clib_error_t *
avf_config_promisc_mode (vlib_main_t * vm, avf_device_t * ad)
{
  virtchnl_promisc_info_t pi = { 0 };

  pi.vsi_id = ad->vsi_id;
  pi.flags = 1;
  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE, &pi,
			 sizeof (virtchnl_promisc_info_t), 0, 0);
}


clib_error_t *
avf_op_config_vsi_queues (vlib_main_t * vm, avf_device_t * ad)
{
  int i;
  int n_qp = clib_max (vec_len (ad->rxqs), vec_len (ad->txqs));
  int msg_len = sizeof (virtchnl_vsi_queue_config_info_t) + n_qp *
    sizeof (virtchnl_queue_pair_info_t);
  u8 msg[msg_len];
  virtchnl_vsi_queue_config_info_t *ci;

  clib_memset (msg, 0, msg_len);
  ci = (virtchnl_vsi_queue_config_info_t *) msg;
  ci->vsi_id = ad->vsi_id;
  ci->num_queue_pairs = n_qp;

  for (i = 0; i < n_qp; i++)
    {
      virtchnl_txq_info_t *txq = &ci->qpair[i].txq;
      virtchnl_rxq_info_t *rxq = &ci->qpair[i].rxq;

      rxq->vsi_id = ad->vsi_id;
      rxq->queue_id = i;
      rxq->max_pkt_size = ETHERNET_MAX_PACKET_BYTES;
      if (i < vec_len (ad->rxqs))
	{
	  avf_rxq_t *q = vec_elt_at_index (ad->rxqs, i);
	  rxq->ring_len = q->size;
	  rxq->databuffer_size = vlib_bufer_get_default_size (vm);
	  rxq->dma_ring_addr = avf_dma_addr (vm, ad, (void *) q->descs);
	  avf_reg_write (ad, AVF_QRX_TAIL (i), q->size - 1);
	}

      avf_txq_t *q = vec_elt_at_index (ad->txqs, i);
      txq->vsi_id = ad->vsi_id;
      if (i < vec_len (ad->txqs))
	{
	  txq->queue_id = i;
	  txq->ring_len = q->size;
	  txq->dma_ring_addr = avf_dma_addr (vm, ad, (void *) q->descs);
	}
    }

  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_CONFIG_VSI_QUEUES, msg, msg_len,
			 0, 0);
}

clib_error_t *
avf_op_config_irq_map (vlib_main_t * vm, avf_device_t * ad)
{
  int count = 1;
  int msg_len = sizeof (virtchnl_irq_map_info_t) +
    count * sizeof (virtchnl_vector_map_t);
  u8 msg[msg_len];
  virtchnl_irq_map_info_t *imi;

  clib_memset (msg, 0, msg_len);
  imi = (virtchnl_irq_map_info_t *) msg;
  imi->num_vectors = count;

  imi->vecmap[0].vector_id = 1;
  imi->vecmap[0].vsi_id = ad->vsi_id;
  imi->vecmap[0].rxq_map = 1;
  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_CONFIG_IRQ_MAP, msg, msg_len, 0,
			 0);
}

clib_error_t *
avf_op_add_eth_addr (vlib_main_t * vm, avf_device_t * ad, u8 count, u8 * macs)
{
  int msg_len =
    sizeof (virtchnl_ether_addr_list_t) +
    count * sizeof (virtchnl_ether_addr_t);
  u8 msg[msg_len];
  virtchnl_ether_addr_list_t *al;
  int i;

  clib_memset (msg, 0, msg_len);
  al = (virtchnl_ether_addr_list_t *) msg;
  al->vsi_id = ad->vsi_id;
  al->num_elements = count;
  for (i = 0; i < count; i++)
    clib_memcpy_fast (&al->list[i].addr, macs + i * 6, 6);
  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_ADD_ETH_ADDR, msg, msg_len, 0,
			 0);
}

clib_error_t *
avf_op_enable_queues (vlib_main_t * vm, avf_device_t * ad, u32 rx, u32 tx)
{
  virtchnl_queue_select_t qs = { 0 };
  int i = 0;
  qs.vsi_id = ad->vsi_id;
  qs.rx_queues = rx;
  qs.tx_queues = tx;
  while (rx)
    {
      if (rx & (1 << i))
	{
	  avf_rxq_t *rxq = vec_elt_at_index (ad->rxqs, i);
	  avf_reg_write (ad, AVF_QRX_TAIL (i), rxq->n_enqueued);
	  rx &= ~(1 << i);
	}
      i++;
    }
  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_ENABLE_QUEUES, &qs,
			 sizeof (virtchnl_queue_select_t), 0, 0);
}

clib_error_t *
avf_op_get_stats (vlib_main_t * vm, avf_device_t * ad,
		  virtchnl_eth_stats_t * es)
{
  virtchnl_queue_select_t qs = { 0 };
  qs.vsi_id = ad->vsi_id;
  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_GET_STATS,
			 &qs, sizeof (virtchnl_queue_select_t),
			 es, sizeof (virtchnl_eth_stats_t));
}

clib_error_t *
avf_device_reset (vlib_main_t * vm, avf_device_t * ad)
{
  avf_aq_desc_t d = { 0 };
  clib_error_t *error;
  u32 rstat;
  int n_retry = 20;

  d.opcode = 0x801;
  d.v_opcode = VIRTCHNL_OP_RESET_VF;
  if ((error = avf_aq_desc_enq (vm, ad, &d, 0, 0)))
    return error;

retry:
  vlib_process_suspend (vm, 10e-3);
  rstat = avf_get_u32 (ad->bar0, AVFGEN_RSTAT);

  if (rstat == 2 || rstat == 3)
    return 0;

  if (--n_retry == 0)
    return clib_error_return (0, "reset failed (timeout)");

  goto retry;
}

clib_error_t *
avf_request_queues (vlib_main_t * vm, avf_device_t * ad, u16 num_queue_pairs)
{
  virtchnl_vf_res_request_t res_req = { 0 };
  clib_error_t *error;
  u32 rstat;
  int n_retry = 20;

  res_req.num_queue_pairs = num_queue_pairs;

  error = avf_send_to_pf (vm, ad, VIRTCHNL_OP_REQUEST_QUEUES, &res_req,
			  sizeof (virtchnl_vf_res_request_t), &res_req,
			  sizeof (virtchnl_vf_res_request_t));

  /*
   * if PF respondes, the request failed
   * else PF initializes restart and avf_send_to_pf returns an error
   */
  if (!error)
    {
      return clib_error_return (0, "requested more than %u queue pairs",
				res_req.num_queue_pairs);
    }

retry:
  vlib_process_suspend (vm, 10e-3);
  rstat = avf_get_u32 (ad->bar0, AVFGEN_RSTAT);

  if ((rstat == VIRTCHNL_VFR_COMPLETED) || (rstat == VIRTCHNL_VFR_VFACTIVE))
    goto done;

  if (--n_retry == 0)
    return clib_error_return (0, "reset failed (timeout)");

  goto retry;

done:
  return NULL;
}

clib_error_t *
avf_device_init (vlib_main_t * vm, avf_main_t * am, avf_device_t * ad,
		 avf_create_if_args_t * args)
{
  virtchnl_version_info_t ver = { 0 };
  virtchnl_vf_resource_t res = { 0 };
  clib_error_t *error;
  vlib_thread_main_t *tm = vlib_get_thread_main ();
  int i;

  avf_adminq_init (vm, ad);

  /* request more queues only if we need them */
  if ((error = avf_request_queues (vm, ad, tm->n_vlib_mains)))
    {
      /* we failed to get more queues, but still we want to proceed */
      clib_error_free (error);

      if ((error = avf_device_reset (vm, ad)))
	return error;
    }

  avf_adminq_init (vm, ad);

  /*
   * OP_VERSION
   */
  if ((error = avf_op_version (vm, ad, &ver)))
    return error;

  if (ver.major != VIRTCHNL_VERSION_MAJOR ||
      ver.minor != VIRTCHNL_VERSION_MINOR)
    return clib_error_return (0, "incompatible protocol version "
			      "(remote %d.%d)", ver.major, ver.minor);

  /*
   * OP_GET_VF_RESOUCES
   */
  if ((error = avf_op_get_vf_resources (vm, ad, &res)))
    return error;

  if (res.num_vsis != 1 || res.vsi_res[0].vsi_type != VIRTCHNL_VSI_SRIOV)
    return clib_error_return (0, "unexpected GET_VF_RESOURCE reply received");

  ad->vsi_id = res.vsi_res[0].vsi_id;
  ad->feature_bitmap = res.vf_offload_flags;
  ad->num_queue_pairs = res.num_queue_pairs;
  ad->max_vectors = res.max_vectors;
  ad->max_mtu = res.max_mtu;
  ad->rss_key_size = res.rss_key_size;
  ad->rss_lut_size = res.rss_lut_size;

  clib_memcpy_fast (ad->hwaddr, res.vsi_res[0].default_mac_addr, 6);

  /*
   * Disable VLAN stripping
   */
  if ((error = avf_op_disable_vlan_stripping (vm, ad)))
    return error;

  if ((error = avf_config_promisc_mode (vm, ad)))
    return error;

  /*
   * Init Queues
   */
  if (args->rxq_num == 0)
    {
      args->rxq_num = 1;
    }
  else if (args->rxq_num > ad->num_queue_pairs)
    {
      args->rxq_num = ad->num_queue_pairs;
      vlib_log_warn (am->log_class, "Requested more rx queues than"
		     "queue pairs available. Using %u rx queues.",
		     args->rxq_num);
    }

  for (i = 0; i < args->rxq_num; i++)
    if ((error = avf_rxq_init (vm, ad, i, args->rxq_size)))
      return error;

  for (i = 0; i < tm->n_vlib_mains; i++)
    if ((error = avf_txq_init (vm, ad, i, args->txq_size)))
      return error;

  if ((ad->feature_bitmap & VIRTCHNL_VF_OFFLOAD_RSS_PF) &&
      (error = avf_op_config_rss_lut (vm, ad)))
    return error;

  if ((ad->feature_bitmap & VIRTCHNL_VF_OFFLOAD_RSS_PF) &&
      (error = avf_op_config_rss_key (vm, ad)))
    return error;

  if ((error = avf_op_config_vsi_queues (vm, ad)))
    return error;

  if ((error = avf_op_config_irq_map (vm, ad)))
    return error;

  avf_irq_0_enable (ad);
  for (i = 0; i < ad->n_rx_queues; i++)
    avf_irq_n_enable (ad, i);

  if ((error = avf_op_add_eth_addr (vm, ad, 1, ad->hwaddr)))
    return error;

  if ((error = avf_op_enable_queues (vm, ad, pow2_mask (ad->n_rx_queues),
				     pow2_mask (ad->n_tx_queues))))
    return error;

  ad->flags |= AVF_DEVICE_F_INITIALIZED;
  return error;
}

void
avf_process_one_device (vlib_main_t * vm, avf_device_t * ad, int is_irq)
{
  avf_main_t *am = &avf_main;
  vnet_main_t *vnm = vnet_get_main ();
  virtchnl_pf_event_t *e;
  u32 r;

  if (ad->flags & AVF_DEVICE_F_ERROR)
    return;

  if ((ad->flags & AVF_DEVICE_F_INITIALIZED) == 0)
    return;

  ASSERT (ad->error == 0);

  /* do not process device in reset state */
  r = avf_get_u32 (ad->bar0, AVFGEN_RSTAT);
  if (r != VIRTCHNL_VFR_VFACTIVE)
    return;

  r = avf_get_u32 (ad->bar0, AVF_ARQLEN);
  if ((r & 0xf0000000) != (1ULL << 31))
    {
      ad->error = clib_error_return (0, "arq not enabled, arqlen = 0x%x", r);
      goto error;
    }

  r = avf_get_u32 (ad->bar0, AVF_ATQLEN);
  if ((r & 0xf0000000) != (1ULL << 31))
    {
      ad->error = clib_error_return (0, "atq not enabled, atqlen = 0x%x", r);
      goto error;
    }

  if (is_irq == 0)
    avf_op_get_stats (vm, ad, &ad->eth_stats);

  /* *INDENT-OFF* */
  vec_foreach (e, ad->events)
    {
      if (e->event == VIRTCHNL_EVENT_LINK_CHANGE)
	{
	  int link_up = e->event_data.link_event.link_status;
	  virtchnl_link_speed_t speed = e->event_data.link_event.link_speed;
	  u32 flags = 0;
	  u32 kbps = 0;

	  if (link_up && (ad->flags & AVF_DEVICE_F_LINK_UP) == 0)
	    {
	      ad->flags |= AVF_DEVICE_F_LINK_UP;
	      flags |= (VNET_HW_INTERFACE_FLAG_FULL_DUPLEX |
			VNET_HW_INTERFACE_FLAG_LINK_UP);
	      if (speed == VIRTCHNL_LINK_SPEED_40GB)
		kbps = 40000000;
	      else if (speed == VIRTCHNL_LINK_SPEED_25GB)
		kbps = 25000000;
	      else if (speed == VIRTCHNL_LINK_SPEED_10GB)
		kbps = 10000000;
	      else if (speed == VIRTCHNL_LINK_SPEED_1GB)
		kbps = 1000000;
	      else if (speed == VIRTCHNL_LINK_SPEED_100MB)
		kbps = 100000;
	      vnet_hw_interface_set_flags (vnm, ad->hw_if_index, flags);
	      vnet_hw_interface_set_link_speed (vnm, ad->hw_if_index, kbps);
	      ad->link_speed = speed;
	    }
	  else if (!link_up && (ad->flags & AVF_DEVICE_F_LINK_UP) != 0)
	    {
	      ad->flags &= ~AVF_DEVICE_F_LINK_UP;
	      ad->link_speed = 0;
	    }

	  if (ad->flags & AVF_DEVICE_F_ELOG)
	    {
	      ELOG_TYPE_DECLARE (el) =
		{
		  .format = "avf[%d] link change: link_status %d "
		    "link_speed %d",
		  .format_args = "i4i1i1",
		};
	      struct
		{
		  u32 dev_instance;
		  u8 link_status;
		  u8 link_speed;
		} *ed;
	      ed = ELOG_DATA (&vm->elog_main, el);
              ed->dev_instance = ad->dev_instance;
	      ed->link_status = link_up;
	      ed->link_speed = speed;
	    }
	}
      else
	{
	  if (ad->flags & AVF_DEVICE_F_ELOG)
	    {
	      ELOG_TYPE_DECLARE (el) =
		{
		  .format = "avf[%d] unknown event: event %d severity %d",
		  .format_args = "i4i4i1i1",
		};
	      struct
		{
		  u32 dev_instance;
		  u32 event;
		  u32 severity;
		} *ed;
	      ed = ELOG_DATA (&vm->elog_main, el);
              ed->dev_instance = ad->dev_instance;
	      ed->event = e->event;
	      ed->severity = e->severity;
	    }
	}
    }
  /* *INDENT-ON* */
  vec_reset_length (ad->events);

  return;

error:
  ad->flags |= AVF_DEVICE_F_ERROR;
  ASSERT (ad->error != 0);
  vlib_log_err (am->log_class, "%U", format_clib_error, ad->error);
}

static u32
avf_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hw, u32 flags)
{
  avf_main_t *am = &avf_main;
  vlib_log_warn (am->log_class, "TODO");
  return 0;
}

static uword
avf_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
{
  avf_main_t *am = &avf_main;
  avf_device_t *ad;
  uword *event_data = 0, event_type;
  int enabled = 0, irq;
  f64 last_run_duration = 0;
  f64 last_periodic_time = 0;

  while (1)
    {
      if (enabled)
	vlib_process_wait_for_event_or_clock (vm, 5.0 - last_run_duration);
      else
	vlib_process_wait_for_event (vm);

      event_type = vlib_process_get_events (vm, &event_data);
      vec_reset_length (event_data);
      irq = 0;

      switch (event_type)
	{
	case ~0:
	  last_periodic_time = vlib_time_now (vm);
	  break;
	case AVF_PROCESS_EVENT_START:
	  enabled = 1;
	  break;
	case AVF_PROCESS_EVENT_STOP:
	  enabled = 0;
	  continue;
	case AVF_PROCESS_EVENT_AQ_INT:
	  irq = 1;
	  break;
	default:
	  ASSERT (0);
	}

      /* *INDENT-OFF* */
      pool_foreach (ad, am->devices,
        {
	  avf_process_one_device (vm, ad, irq);
        });
      /* *INDENT-ON* */
      last_run_duration = vlib_time_now (vm) - last_periodic_time;
    }
  return 0;
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (avf_process_node, static)  = {
  .function = avf_process,
  .type = VLIB_NODE_TYPE_PROCESS,
  .name = "avf-process",
};
/* *INDENT-ON* */

static void
avf_irq_0_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h, u16 line)
{
  avf_main_t *am = &avf_main;
  uword pd = vlib_pci_get_private_data (vm, h);
  avf_device_t *ad = pool_elt_at_index (am->devices, pd);
  u32 icr0;

  icr0 = avf_reg_read (ad, AVFINT_ICR0);

  if (ad->flags & AVF_DEVICE_F_ELOG)
    {
      /* *INDENT-OFF* */
      ELOG_TYPE_DECLARE (el) =
	{
	  .format = "avf[%d] irq 0: icr0 0x%x",
	  .format_args = "i4i4",
	};
      /* *INDENT-ON* */
      struct
      {
	u32 dev_instance;
	u32 icr0;
      } *ed;

      ed = ELOG_DATA (&vm->elog_main, el);
      ed->dev_instance = ad->dev_instance;
      ed->icr0 = icr0;
    }

  avf_irq_0_enable (ad);

  /* bit 30 - Send/Receive Admin queue interrupt indication */
  if (icr0 & (1 << 30))
    vlib_process_signal_event (vm, avf_process_node.index,
			       AVF_PROCESS_EVENT_AQ_INT, 0);
}

static void
avf_irq_n_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h, u16 line)
{
  vnet_main_t *vnm = vnet_get_main ();
  avf_main_t *am = &avf_main;
  uword pd = vlib_pci_get_private_data (vm, h);
  avf_device_t *ad = pool_elt_at_index (am->devices, pd);
  u16 qid;
  int i;

  if (ad->flags & AVF_DEVICE_F_ELOG)
    {
      /* *INDENT-OFF* */
      ELOG_TYPE_DECLARE (el) =
	{
	  .format = "avf[%d] irq %d: received",
	  .format_args = "i4i2",
	};
      /* *INDENT-ON* */
      struct
      {
	u32 dev_instance;
	u16 line;
      } *ed;

      ed = ELOG_DATA (&vm->elog_main, el);
      ed->dev_instance = ad->dev_instance;
      ed->line = line;
    }

  qid = line - 1;
  if (vec_len (ad->rxqs) > qid && ad->rxqs[qid].int_mode != 0)
    vnet_device_input_set_interrupt_pending (vnm, ad->hw_if_index, qid);
  for (i = 0; i < vec_len (ad->rxqs); i++)
    avf_irq_n_enable (ad, i);
}

void
avf_delete_if (vlib_main_t * vm, avf_device_t * ad)
{
  vnet_main_t *vnm = vnet_get_main ();
  avf_main_t *am = &avf_main;
  int i;

  if (ad->hw_if_index)
    {
      vnet_hw_interface_set_flags (vnm, ad->hw_if_index, 0);
      vnet_hw_interface_unassign_rx_thread (vnm, ad->hw_if_index, 0);
      ethernet_delete_interface (vnm, ad->hw_if_index);
    }

  vlib_pci_device_close (vm, ad->pci_dev_handle);

  vlib_physmem_free (vm, ad->atq);
  vlib_physmem_free (vm, ad->arq);
  vlib_physmem_free (vm, ad->atq_bufs);
  vlib_physmem_free (vm, ad->arq_bufs);

  /* *INDENT-OFF* */
  vec_foreach_index (i, ad->rxqs)
    {
      avf_rxq_t *rxq = vec_elt_at_index (ad->rxqs, i);
      vlib_physmem_free (vm, (void *) rxq->descs);
      if (rxq->n_enqueued)
	vlib_buffer_free_from_ring (vm, rxq->bufs, rxq->next, rxq->size,
				    rxq->n_enqueued);
      vec_free (rxq->bufs);
    }
  /* *INDENT-ON* */
  vec_free (ad->rxqs);

  /* *INDENT-OFF* */
  vec_foreach_index (i, ad->txqs)
    {
      avf_txq_t *txq = vec_elt_at_index (ad->txqs, i);
      vlib_physmem_free (vm, (void *) txq->descs);
      if (txq->n_enqueued)
	{
	  u16 first = (txq->next - txq->n_enqueued) & (txq->size -1);
	  vlib_buffer_free_from_ring (vm, txq->bufs, first, txq->size,
				      txq->n_enqueued);
	}
      vec_free (txq->bufs);
      clib_ring_free (txq->rs_slots);
    }
  /* *INDENT-ON* */
  vec_free (ad->txqs);
  vec_free (ad->name);

  clib_error_free (ad->error);
  clib_memset (ad, 0, sizeof (*ad));
  pool_put (am->devices, ad);
}

void
avf_create_if (vlib_main_t * vm, avf_create_if_args_t * args)
{
  vnet_main_t *vnm = vnet_get_main ();
  avf_main_t *am = &avf_main;
  avf_device_t *ad;
  vlib_pci_dev_handle_t h;
  clib_error_t *error = 0;
  int i;

  /* check input args */
  args->rxq_size = (args->rxq_size == 0) ? AVF_RXQ_SZ : args->rxq_size;
  args->txq_size = (args->txq_size == 0) ? AVF_TXQ_SZ : args->txq_size;

  if ((args->rxq_size & (args->rxq_size - 1))
      || (args->txq_size & (args->txq_size - 1)))
    {
      args->rv = VNET_API_ERROR_INVALID_VALUE;
      args->error =
	clib_error_return (error, "queue size must be a power of two");
      return;
    }

  pool_get (am->devices, ad);
  ad->dev_instance = ad - am->devices;
  ad->per_interface_next_index = ~0;
  ad->name = vec_dup (args->name);

  if (args->enable_elog)
    ad->flags |= AVF_DEVICE_F_ELOG;

  if ((error = vlib_pci_device_open (vm, &args->addr, avf_pci_device_ids,
				     &h)))
    {
      pool_put (am->devices, ad);
      args->rv = VNET_API_ERROR_INVALID_INTERFACE;
      args->error =
	clib_error_return (error, "pci-addr %U", format_vlib_pci_addr,
			   &args->addr);
      return;
    }
  ad->pci_dev_handle = h;
  ad->numa_node = vlib_pci_get_numa_node (vm, h);

  vlib_pci_set_private_data (vm, h, ad->dev_instance);

  if ((error = vlib_pci_bus_master_enable (vm, h)))
    goto error;

  if ((error = vlib_pci_map_region (vm, h, 0, &ad->bar0)))
    goto error;

  if ((error = vlib_pci_register_msix_handler (vm, h, 0, 1,
					       &avf_irq_0_handler)))
    goto error;

  if ((error = vlib_pci_register_msix_handler (vm, h, 1, 1,
					       &avf_irq_n_handler)))
    goto error;

  if ((error = vlib_pci_enable_msix_irq (vm, h, 0, 2)))
    goto error;

  ad->atq = vlib_physmem_alloc_aligned_on_numa (vm, sizeof (avf_aq_desc_t) *
						AVF_MBOX_LEN,
						CLIB_CACHE_LINE_BYTES,
						ad->numa_node);
  if (ad->atq == 0)
    {
      error = vlib_physmem_last_error (vm);
      goto error;
    }

  if ((error = vlib_pci_map_dma (vm, h, ad->atq)))
    goto error;

  ad->arq = vlib_physmem_alloc_aligned_on_numa (vm, sizeof (avf_aq_desc_t) *
						AVF_MBOX_LEN,
						CLIB_CACHE_LINE_BYTES,
						ad->numa_node);
  if (ad->arq == 0)
    {
      error = vlib_physmem_last_error (vm);
      goto error;
    }

  if ((error = vlib_pci_map_dma (vm, h, ad->arq)))
    goto error;

  ad->atq_bufs = vlib_physmem_alloc_aligned_on_numa (vm, AVF_MBOX_BUF_SZ *
						     AVF_MBOX_LEN,
						     CLIB_CACHE_LINE_BYTES,
						     ad->numa_node);
  if (ad->atq_bufs == 0)
    {
      error = vlib_physmem_last_error (vm);
      goto error;
    }

  if ((error = vlib_pci_map_dma (vm, h, ad->atq_bufs)))
    goto error;

  ad->arq_bufs = vlib_physmem_alloc_aligned_on_numa (vm, AVF_MBOX_BUF_SZ *
						     AVF_MBOX_LEN,
						     CLIB_CACHE_LINE_BYTES,
						     ad->numa_node);
  if (ad->arq_bufs == 0)
    {
      error = vlib_physmem_last_error (vm);
      goto error;
    }

  if ((error = vlib_pci_map_dma (vm, h, ad->arq_bufs)))
    goto error;

  if ((error = vlib_pci_intr_enable (vm, h)))
    goto error;

  if (vlib_pci_supports_virtual_addr_dma (vm, h))
    ad->flags |= AVF_DEVICE_F_VA_DMA;

  if ((error = avf_device_init (vm, am, ad, args)))
    goto error;

  /* create interface */
  error = ethernet_register_interface (vnm, avf_device_class.index,
				       ad->dev_instance, ad->hwaddr,
				       &ad->hw_if_index, avf_flag_change);

  if (error)
    goto error;

  vnet_sw_interface_t *sw = vnet_get_hw_sw_interface (vnm, ad->hw_if_index);
  args->sw_if_index = ad->sw_if_index = sw->sw_if_index;

  vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, ad->hw_if_index);
  hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
  vnet_hw_interface_set_input_node (vnm, ad->hw_if_index,
				    avf_input_node.index);

  for (i = 0; i < ad->n_rx_queues; i++)
    vnet_hw_interface_assign_rx_thread (vnm, ad->hw_if_index, i, ~0);

  if (pool_elts (am->devices) == 1)
    vlib_process_signal_event (vm, avf_process_node.index,
			       AVF_PROCESS_EVENT_START, 0);

  return;

error:
  avf_delete_if (vm, ad);
  args->rv = VNET_API_ERROR_INVALID_INTERFACE;
  args->error = clib_error_return (error, "pci-addr %U",
				   format_vlib_pci_addr, &args->addr);
  vlib_log_err (am->log_class, "%U", format_clib_error, args->error);
}

static clib_error_t *
avf_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
{
  vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
  avf_main_t *am = &avf_main;
  avf_device_t *ad = vec_elt_at_index (am->devices, hi->dev_instance);
  uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;

  if (ad->flags & AVF_DEVICE_F_ERROR)
    return clib_error_return (0, "device is in error state");

  if (is_up)
    {
      vnet_hw_interface_set_flags (vnm, ad->hw_if_index,
				   VNET_HW_INTERFACE_FLAG_LINK_UP);
      ad->flags |= AVF_DEVICE_F_ADMIN_UP;
    }
  else
    {
      vnet_hw_interface_set_flags (vnm, ad->hw_if_index, 0);
      ad->flags &= ~AVF_DEVICE_F_ADMIN_UP;
    }
  return 0;
}

static clib_error_t *
avf_interface_rx_mode_change (vnet_main_t * vnm, u32 hw_if_index, u32 qid,
			      vnet_hw_interface_rx_mode mode)
{
  avf_main_t *am = &avf_main;
  vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
  avf_device_t *ad = pool_elt_at_index (am->devices, hw->dev_instance);
  avf_rxq_t *rxq = vec_elt_at_index (ad->rxqs, qid);

  if (mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
    rxq->int_mode = 0;
  else
    rxq->int_mode = 1;

  return 0;
}

static void
avf_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
			     u32 node_index)
{
  avf_main_t *am = &avf_main;
  vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
  avf_device_t *ad = pool_elt_at_index (am->devices, hw->dev_instance);

  /* Shut off redirection */
  if (node_index == ~0)
    {
      ad->per_interface_next_index = node_index;
      return;
    }

  ad->per_interface_next_index =
    vlib_node_add_next (vlib_get_main (), avf_input_node.index, node_index);
}

static char *avf_tx_func_error_strings[] = {
#define _(n,s) s,
  foreach_avf_tx_func_error
#undef _
};

/* *INDENT-OFF* */
VNET_DEVICE_CLASS (avf_device_class,) =
{
  .name = "Adaptive Virtual Function (AVF) interface",
  .format_device = format_avf_device,
  .format_device_name = format_avf_device_name,
  .admin_up_down_function = avf_interface_admin_up_down,
  .rx_mode_change_function = avf_interface_rx_mode_change,
  .rx_redirect_to_node = avf_set_interface_next_node,
  .tx_function_n_errors = AVF_TX_N_ERROR,
  .tx_function_error_strings = avf_tx_func_error_strings,
};
/* *INDENT-ON* */

clib_error_t *
avf_init (vlib_main_t * vm)
{
  avf_main_t *am = &avf_main;
  clib_error_t *error;
  vlib_thread_main_t *tm = vlib_get_thread_main ();

  if ((error = vlib_call_init_function (vm, pci_bus_init)))
    return error;

  vec_validate_aligned (am->per_thread_data, tm->n_vlib_mains - 1,
			CLIB_CACHE_LINE_BYTES);

  am->log_class = vlib_log_register_class ("avf_plugin", 0);
  vlib_log_debug (am->log_class, "initialized");

  return 0;
}

VLIB_INIT_FUNCTION (avf_init);

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */