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/*
 * Copyright (c) 2017 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.
 */

#ifndef __ABF_ITF_ATTACH_H__
#define __ABF_ITF_ATTACH_H__

#include <plugins/abf/abf_policy.h>
#include <vnet/fib/fib_path_list.h>

/**
 * Attachment data for an ABF policy to an interface
 */
typedef struct abf_itf_attach_t_
{
  CLIB_CACHE_LINE_ALIGN_MARK (marker);
  /**
   * The ACL and DPO are cached for fast DP access
   */
  /**
   * ACL index to match
   */
  u32 aia_acl;

  /**
   * The DPO actually used for forwarding
   */
  dpo_id_t aia_dpo;

  /**
   * Linkage into the FIB graph
   */
  fib_node_t aia_node;

  /**
   * The VPP index of the ABF policy
   */
  u32 aia_abf;

  /**
   * Sibling index on the policy's path list
   */
  u32 aia_sibling;

  /**
   * The protocol for the attachment. i.e. the protocol
   * of the packets that are being forwarded
   */
  fib_protocol_t aia_proto;

  /**
   * The interface for the attachment
   */
  u32 aia_sw_if_index;

  /**
   * The priority of this policy for attachment.
   * The lower the value the higher the priority.
   * The higher priority policies are matched first.
   */
  u32 aia_prio;
} abf_itf_attach_t;

/**
 * Pool of ABF interface attachment objects
 */
extern abf_itf_attach_t *abf_itf_attach_pool;

static inline abf_itf_attach_t *
abf_itf_attach_get (u32 index)
{
  return (pool_elt_at_index (abf_itf_attach_pool, index));
}

extern int abf_itf_attach (fib_protocol_t fproto,
			   u32 policy_id, u32 priority, u32 sw_if_index);

extern int abf_itf_detach (fib_protocol_t fproto,
			   u32 policy_id, u32 sw_if_index);

typedef int (*abf_itf_attach_walk_cb_t) (index_t aii, void *ctx0);

extern void abf_itf_attach_walk (abf_itf_attach_walk_cb_t cb, void *ctx);

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

#endif
class="n">b->timeout = 1; } static void i2c_start (i2c_bus_t * b) { b->timeout = 0; b->put_bits (b, 1, 1); i2c_wait_for_scl (b); if (vlib_i2c_bus_timed_out (b)) return; b->put_bits (b, 1, 0); i2c_delay (b, b->hold_time); b->put_bits (b, 0, 0); i2c_delay (b, b->hold_time); } static void i2c_stop (i2c_bus_t * b) { b->put_bits (b, 0, 0); i2c_delay (b, b->rise_fall_time); b->put_bits (b, 1, 0); i2c_delay (b, b->hold_time); b->put_bits (b, 1, 1); i2c_delay (b, b->hold_time); } static void i2c_write_bit (i2c_bus_t * b, int sda) { b->put_bits (b, 0, sda); i2c_delay (b, b->rise_fall_time); b->put_bits (b, 1, sda); i2c_wait_for_scl (b); i2c_delay (b, b->hold_time); b->put_bits (b, 0, sda); i2c_delay (b, b->rise_fall_time); } static void i2c_read_bit (i2c_bus_t * b, int *sda) { int scl; b->put_bits (b, 1, 1); i2c_wait_for_scl (b); i2c_delay (b, b->hold_time); b->get_bits (b, &scl, sda); b->put_bits (b, 0, 1); i2c_delay (b, b->rise_fall_time); } static void i2c_write_byte (i2c_bus_t * b, u8 data) { int i, sda; for (i = 7; i >= 0; i--) { i2c_write_bit (b, (data >> i) & 1); if (b->timeout) return; } b->put_bits (b, 0, 1); i2c_delay (b, b->rise_fall_time); i2c_read_bit (b, &sda); if (sda) b->timeout = 1; } static void i2c_read_byte (i2c_bus_t * b, u8 * data, int ack) { int i, sda; *data = 0; b->put_bits (b, 0, 1); i2c_delay (b, b->rise_fall_time); for (i = 7; i >= 0; i--) { i2c_read_bit (b, &sda); if (b->timeout) return; *data |= (sda != 0) << i; } i2c_write_bit (b, ack == 0); } void vlib_i2c_init (i2c_bus_t * b) { f64 tick; if (!b->clock) b->clock = 400000; tick = 1.0 / b->clock; /* Spend 40% of time in low and high states */ if (!b->hold_time) b->hold_time = 0.4 * tick; /* Spend 10% of time waiting for rise and fall */ if (!b->rise_fall_time) b->rise_fall_time = 0.1 * tick; } void vlib_i2c_xfer (i2c_bus_t * bus, i2c_msg_t * msgs) { i2c_msg_t *msg; int i; vec_foreach (msg, msgs) { i2c_start (bus); i2c_write_byte (bus, (msg->addr << 1) + (msg->flags == I2C_MSG_FLAG_READ)); if (msg->flags & I2C_MSG_FLAG_READ) for (i = 0; i < msg->len; i++) { i2c_read_byte (bus, &msg->buffer[i], /* ack */ i + 1 != msg->len); if (bus->timeout) goto done; } else for (i = 0; i < msg->len; i++) { i2c_write_byte (bus, msg->buffer[i]); if (bus->timeout) goto done; } } done: i2c_stop (bus); } void vlib_i2c_read_eeprom (i2c_bus_t * bus, u8 i2c_addr, u16 start_addr, u16 length, u8 * data) { i2c_msg_t *msg = 0; u8 start_address[1]; vec_validate (msg, 1); start_address[0] = start_addr; msg[0].addr = i2c_addr; msg[0].flags = I2C_MSG_FLAG_WRITE; msg[0].buffer = (u8 *) & start_address; msg[0].len = 1; msg[1].addr = i2c_addr; msg[1].flags = I2C_MSG_FLAG_READ; msg[1].buffer = data; msg[1].len = length; vlib_i2c_xfer (bus, msg); vec_free (msg); } /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */