kernel/drivers/net/ixgbe/ixgbe_osdep.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * Copyright(c) 2007-2009 Intel Corporation. All rights reserved.
   5  * The contents of this file are subject to the terms of the
   6  * Common Development and Distribution License (the "License").
   7  * You may not use this file except in compliance with the License.
   8  *
   9  * You can obtain a copy of the license at:
  10  *      http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When using or redistributing this file, you may do so under the
  15  * License only. No other modification of this header is permitted.
  16  *
  17  * If applicable, add the following below this CDDL HEADER, with the
  18  * fields enclosed by brackets "[]" replaced with your own identifying
  19  * information: Portions Copyright [yyyy] [name of copyright owner]
  20  *
  21  * CDDL HEADER END
  22  */
  23
  24 /*
  25  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  26  * Use is subject to license terms.
  27  * Copyright (c) 2017, Joyent, Inc.
  28  */
  29
  30 #include "ixgbe_sw.h"
  31
  32 uint16_t
  33 ixgbe_read_pci_cfg(struct ixgbe_hw *hw, uint32_t reg)
  34 {
  35         return (pci_config_get16(OS_DEP(hw)->cfg_handle, reg));
  36 }
  37
  38 void
  39 ixgbe_write_pci_cfg(struct ixgbe_hw *hw, uint32_t reg, uint32_t val)
  40 {
  41         pci_config_put16(OS_DEP(hw)->cfg_handle, reg, val);
  42 }
  43
  44 /*
  45  * This is our last line of defense against a hardware device that has decided
  46  * to somehow disappear without our knowledge of it. To try and deal with this,
  47  * we'll read the status register and see if it returns all 1s, indicating an
  48  * invalid read. Note the status register is defined to have bits in all current
  49  * revisions that are hardwired to zero.
  50  */
  51 boolean_t
  52 ixgbe_removed(struct ixgbe_hw *hw)
  53 {
  54         uint32_t val;
  55
  56         val = IXGBE_READ_REG(hw, IXGBE_STATUS);
  57         if (val == PCI_EINVAL32) {
  58                 ixgbe_t *ixgbe = OS_DEP(hw)->ixgbe;
  59
  60                 ixgbe_error(ixgbe, "failed to read status register: device "
  61                     "may be gone");
  62                 if (ixgbe->ixgbe_ks != NULL) {
  63                         ixgbe_stat_t *s = ixgbe->ixgbe_ks->ks_data;
  64                         s->dev_gone.value.ui64++;
  65                 }
  66                 return (B_TRUE);
  67         }
  68         return (B_FALSE);
  69 }