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path: root/drivers/pci/hotplug/shpchprm_acpi.c
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Diffstat (limited to 'drivers/pci/hotplug/shpchprm_acpi.c')
-rw-r--r--drivers/pci/hotplug/shpchprm_acpi.c186
1 files changed, 0 insertions, 186 deletions
diff --git a/drivers/pci/hotplug/shpchprm_acpi.c b/drivers/pci/hotplug/shpchprm_acpi.c
deleted file mode 100644
index 17145e52223a..000000000000
--- a/drivers/pci/hotplug/shpchprm_acpi.c
+++ /dev/null
@@ -1,186 +0,0 @@
1/*
2 * SHPCHPRM ACPI: PHP Resource Manager for ACPI platform
3 *
4 * Copyright (C) 2003-2004 Intel Corporation
5 *
6 * All rights reserved.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or (at
11 * your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
16 * NON INFRINGEMENT. See the GNU General Public License for more
17 * details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * Send feedback to <kristen.c.accardi@intel.com>
24 *
25 */
26
27#include <linux/module.h>
28#include <linux/kernel.h>
29#include <linux/types.h>
30#include <linux/pci.h>
31#include <acpi/acpi.h>
32#include <acpi/acpi_bus.h>
33#include <acpi/actypes.h>
34#include "shpchp.h"
35
36#define METHOD_NAME__SUN "_SUN"
37#define METHOD_NAME__HPP "_HPP"
38#define METHOD_NAME_OSHP "OSHP"
39
40static u8 * acpi_path_name( acpi_handle handle)
41{
42 acpi_status status;
43 static u8 path_name[ACPI_PATHNAME_MAX];
44 struct acpi_buffer ret_buf = { ACPI_PATHNAME_MAX, path_name };
45
46 memset(path_name, 0, sizeof (path_name));
47 status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &ret_buf);
48
49 if (ACPI_FAILURE(status))
50 return NULL;
51 else
52 return path_name;
53}
54
55static acpi_status
56acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp)
57{
58 acpi_status status;
59 u8 nui[4];
60 struct acpi_buffer ret_buf = { 0, NULL};
61 union acpi_object *ext_obj, *package;
62 u8 *path_name = acpi_path_name(handle);
63 int i, len = 0;
64
65 /* get _hpp */
66 status = acpi_evaluate_object(handle, METHOD_NAME__HPP, NULL, &ret_buf);
67 switch (status) {
68 case AE_BUFFER_OVERFLOW:
69 ret_buf.pointer = kmalloc (ret_buf.length, GFP_KERNEL);
70 if (!ret_buf.pointer) {
71 err ("%s:%s alloc for _HPP fail\n", __FUNCTION__,
72 path_name);
73 return AE_NO_MEMORY;
74 }
75 status = acpi_evaluate_object(handle, METHOD_NAME__HPP,
76 NULL, &ret_buf);
77 if (ACPI_SUCCESS(status))
78 break;
79 default:
80 if (ACPI_FAILURE(status)) {
81 dbg("%s:%s _HPP fail=0x%x\n", __FUNCTION__,
82 path_name, status);
83 return status;
84 }
85 }
86
87 ext_obj = (union acpi_object *) ret_buf.pointer;
88 if (ext_obj->type != ACPI_TYPE_PACKAGE) {
89 err ("%s:%s _HPP obj not a package\n", __FUNCTION__,
90 path_name);
91 status = AE_ERROR;
92 goto free_and_return;
93 }
94
95 len = ext_obj->package.count;
96 package = (union acpi_object *) ret_buf.pointer;
97 for ( i = 0; (i < len) || (i < 4); i++) {
98 ext_obj = (union acpi_object *) &package->package.elements[i];
99 switch (ext_obj->type) {
100 case ACPI_TYPE_INTEGER:
101 nui[i] = (u8)ext_obj->integer.value;
102 break;
103 default:
104 err ("%s:%s _HPP obj type incorrect\n", __FUNCTION__,
105 path_name);
106 status = AE_ERROR;
107 goto free_and_return;
108 }
109 }
110
111 hpp->cache_line_size = nui[0];
112 hpp->latency_timer = nui[1];
113 hpp->enable_serr = nui[2];
114 hpp->enable_perr = nui[3];
115
116 dbg(" _HPP: cache_line_size=0x%x\n", hpp->cache_line_size);
117 dbg(" _HPP: latency timer =0x%x\n", hpp->latency_timer);
118 dbg(" _HPP: enable SERR =0x%x\n", hpp->enable_serr);
119 dbg(" _HPP: enable PERR =0x%x\n", hpp->enable_perr);
120
121free_and_return:
122 kfree(ret_buf.pointer);
123 return status;
124}
125
126static void acpi_run_oshp(acpi_handle handle)
127{
128 acpi_status status;
129 u8 *path_name = acpi_path_name(handle);
130
131 /* run OSHP */
132 status = acpi_evaluate_object(handle, METHOD_NAME_OSHP, NULL, NULL);
133 if (ACPI_FAILURE(status)) {
134 err("%s:%s OSHP fails=0x%x\n", __FUNCTION__, path_name,
135 status);
136 } else {
137 dbg("%s:%s OSHP passes\n", __FUNCTION__, path_name);
138 }
139}
140
141int shpchprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
142{
143 int offset = devnum - ctrl->slot_device_offset;
144
145 dbg("%s: ctrl->slot_num_inc %d, offset %d\n", __FUNCTION__, ctrl->slot_num_inc, offset);
146 *sun = (u8) (ctrl->first_slot + ctrl->slot_num_inc *offset);
147 return 0;
148}
149
150void get_hp_hw_control_from_firmware(struct pci_dev *dev)
151{
152 /*
153 * OSHP is an optional ACPI firmware control method. If present,
154 * we need to run it to inform BIOS that we will control SHPC
155 * hardware from now on.
156 */
157 acpi_handle handle = DEVICE_ACPI_HANDLE(&(dev->dev));
158 if (!handle)
159 return;
160 acpi_run_oshp(handle);
161}
162
163void get_hp_params_from_firmware(struct pci_dev *dev,
164 struct hotplug_params *hpp)
165{
166 acpi_status status = AE_NOT_FOUND;
167 struct pci_dev *pdev = dev;
168
169 /*
170 * _HPP settings apply to all child buses, until another _HPP is
171 * encountered. If we don't find an _HPP for the input pci dev,
172 * look for it in the parent device scope since that would apply to
173 * this pci dev. If we don't find any _HPP, use hardcoded defaults
174 */
175 while (pdev && (ACPI_FAILURE(status))) {
176 acpi_handle handle = DEVICE_ACPI_HANDLE(&(pdev->dev));
177 if (!handle)
178 break;
179 status = acpi_run_hpp(handle, hpp);
180 if (!(pdev->bus->parent))
181 break;
182 /* Check if a parent object supports _HPP */
183 pdev = pdev->bus->parent->self;
184 }
185}
186
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-07 04:01:28 -0500