1 /******************************************************************************
2 SPDX-License-Identifier: BSD-3-Clause
3
4 Copyright (c) 2001-2020, Intel Corporation
5 All rights reserved.
6
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions are met:
9
10 1. Redistributions of source code must retain the above copyright notice,
11 this list of conditions and the following disclaimer.
12
13 2. Redistributions in binary form must reproduce the above copyright
14 notice, this list of conditions and the following disclaimer in the
15 documentation and/or other materials provided with the distribution.
16
17 3. Neither the name of the Intel Corporation nor the names of its
18 contributors may be used to endorse or promote products derived from
19 this software without specific prior written permission.
20
21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 POSSIBILITY OF SUCH DAMAGE.
32
33 ******************************************************************************/
34
35 #include "e1000_api.h"
36
37 int e1000_use_pause_delay = 0;
38
39 static void
e1000_enable_pause_delay(void * use_pause_delay)40 e1000_enable_pause_delay(void *use_pause_delay)
41 {
42 *((int *)use_pause_delay) = 1;
43 }
44
45 SYSINIT(enable_pause_delay, SI_SUB_CLOCKS, SI_ORDER_ANY, e1000_enable_pause_delay, &e1000_use_pause_delay);
46
47 /*
48 * NOTE: the following routines using the e1000
49 * naming style are provided to the shared
50 * code but are OS specific
51 */
52
53 void
e1000_write_pci_cfg(struct e1000_hw * hw,u32 reg,u16 * value)54 e1000_write_pci_cfg(struct e1000_hw *hw, u32 reg, u16 *value)
55 {
56 pci_write_config(((struct e1000_osdep *)hw->back)->dev, reg, *value, 2);
57 }
58
59 void
e1000_read_pci_cfg(struct e1000_hw * hw,u32 reg,u16 * value)60 e1000_read_pci_cfg(struct e1000_hw *hw, u32 reg, u16 *value)
61 {
62 *value = pci_read_config(((struct e1000_osdep *)hw->back)->dev, reg, 2);
63 }
64
65 void
e1000_pci_set_mwi(struct e1000_hw * hw)66 e1000_pci_set_mwi(struct e1000_hw *hw)
67 {
68 pci_write_config(((struct e1000_osdep *)hw->back)->dev, PCIR_COMMAND,
69 (hw->bus.pci_cmd_word | CMD_MEM_WRT_INVALIDATE), 2);
70 }
71
72 void
e1000_pci_clear_mwi(struct e1000_hw * hw)73 e1000_pci_clear_mwi(struct e1000_hw *hw)
74 {
75 pci_write_config(((struct e1000_osdep *)hw->back)->dev, PCIR_COMMAND,
76 (hw->bus.pci_cmd_word & ~CMD_MEM_WRT_INVALIDATE), 2);
77 }
78
79 /*
80 * Read the PCI Express capabilities
81 */
82 int32_t
e1000_read_pcie_cap_reg(struct e1000_hw * hw,u32 reg,u16 * value)83 e1000_read_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
84 {
85 device_t dev = ((struct e1000_osdep *)hw->back)->dev;
86 u32 offset;
87
88 pci_find_cap(dev, PCIY_EXPRESS, &offset);
89 *value = pci_read_config(dev, offset + reg, 2);
90 return (E1000_SUCCESS);
91 }
92
93 /*
94 * Write the PCI Express capabilities
95 */
96 int32_t
e1000_write_pcie_cap_reg(struct e1000_hw * hw,u32 reg,u16 * value)97 e1000_write_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
98 {
99 device_t dev = ((struct e1000_osdep *)hw->back)->dev;
100 u32 offset;
101
102 pci_find_cap(dev, PCIY_EXPRESS, &offset);
103 pci_write_config(dev, offset + reg, *value, 2);
104 return (E1000_SUCCESS);
105 }
106