diff options
author | Len Brown <len.brown@intel.com> | 2009-04-05 02:14:15 -0400 |
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committer | Len Brown <len.brown@intel.com> | 2009-04-05 02:14:15 -0400 |
commit | 478c6a43fcbc6c11609f8cee7c7b57223907754f (patch) | |
tree | a7f7952099da60d33032aed6de9c0c56c9f8779e /drivers/pci/pci-acpi.c | |
parent | 8a3f257c704e02aee9869decd069a806b45be3f1 (diff) | |
parent | 6bb597507f9839b13498781e481f5458aea33620 (diff) |
Merge branch 'linus' into release
Conflicts:
arch/x86/kernel/cpu/cpufreq/longhaul.c
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/pci/pci-acpi.c')
-rw-r--r-- | drivers/pci/pci-acpi.c | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 368ca72dffbc..ea15b0537457 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c | |||
@@ -18,221 +18,6 @@ | |||
18 | #include <linux/pci-acpi.h> | 18 | #include <linux/pci-acpi.h> |
19 | #include "pci.h" | 19 | #include "pci.h" |
20 | 20 | ||
21 | struct acpi_osc_data { | ||
22 | acpi_handle handle; | ||
23 | u32 support_set; | ||
24 | u32 control_set; | ||
25 | u32 control_query; | ||
26 | int is_queried; | ||
27 | struct list_head sibiling; | ||
28 | }; | ||
29 | static LIST_HEAD(acpi_osc_data_list); | ||
30 | |||
31 | struct acpi_osc_args { | ||
32 | u32 capbuf[3]; | ||
33 | }; | ||
34 | |||
35 | static DEFINE_MUTEX(pci_acpi_lock); | ||
36 | |||
37 | static struct acpi_osc_data *acpi_get_osc_data(acpi_handle handle) | ||
38 | { | ||
39 | struct acpi_osc_data *data; | ||
40 | |||
41 | list_for_each_entry(data, &acpi_osc_data_list, sibiling) { | ||
42 | if (data->handle == handle) | ||
43 | return data; | ||
44 | } | ||
45 | data = kzalloc(sizeof(*data), GFP_KERNEL); | ||
46 | if (!data) | ||
47 | return NULL; | ||
48 | INIT_LIST_HEAD(&data->sibiling); | ||
49 | data->handle = handle; | ||
50 | list_add_tail(&data->sibiling, &acpi_osc_data_list); | ||
51 | return data; | ||
52 | } | ||
53 | |||
54 | static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40, | ||
55 | 0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66}; | ||
56 | |||
57 | static acpi_status acpi_run_osc(acpi_handle handle, | ||
58 | struct acpi_osc_args *osc_args, u32 *retval) | ||
59 | { | ||
60 | acpi_status status; | ||
61 | struct acpi_object_list input; | ||
62 | union acpi_object in_params[4]; | ||
63 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; | ||
64 | union acpi_object *out_obj; | ||
65 | u32 errors, flags = osc_args->capbuf[OSC_QUERY_TYPE]; | ||
66 | |||
67 | /* Setting up input parameters */ | ||
68 | input.count = 4; | ||
69 | input.pointer = in_params; | ||
70 | in_params[0].type = ACPI_TYPE_BUFFER; | ||
71 | in_params[0].buffer.length = 16; | ||
72 | in_params[0].buffer.pointer = OSC_UUID; | ||
73 | in_params[1].type = ACPI_TYPE_INTEGER; | ||
74 | in_params[1].integer.value = 1; | ||
75 | in_params[2].type = ACPI_TYPE_INTEGER; | ||
76 | in_params[2].integer.value = 3; | ||
77 | in_params[3].type = ACPI_TYPE_BUFFER; | ||
78 | in_params[3].buffer.length = 12; | ||
79 | in_params[3].buffer.pointer = (u8 *)osc_args->capbuf; | ||
80 | |||
81 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); | ||
82 | if (ACPI_FAILURE(status)) | ||
83 | return status; | ||
84 | |||
85 | if (!output.length) | ||
86 | return AE_NULL_OBJECT; | ||
87 | |||
88 | out_obj = output.pointer; | ||
89 | if (out_obj->type != ACPI_TYPE_BUFFER) { | ||
90 | printk(KERN_DEBUG "Evaluate _OSC returns wrong type\n"); | ||
91 | status = AE_TYPE; | ||
92 | goto out_kfree; | ||
93 | } | ||
94 | /* Need to ignore the bit0 in result code */ | ||
95 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | ||
96 | if (errors) { | ||
97 | if (errors & OSC_REQUEST_ERROR) | ||
98 | printk(KERN_DEBUG "_OSC request fails\n"); | ||
99 | if (errors & OSC_INVALID_UUID_ERROR) | ||
100 | printk(KERN_DEBUG "_OSC invalid UUID\n"); | ||
101 | if (errors & OSC_INVALID_REVISION_ERROR) | ||
102 | printk(KERN_DEBUG "_OSC invalid revision\n"); | ||
103 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | ||
104 | if (flags & OSC_QUERY_ENABLE) | ||
105 | goto out_success; | ||
106 | printk(KERN_DEBUG "_OSC FW not grant req. control\n"); | ||
107 | status = AE_SUPPORT; | ||
108 | goto out_kfree; | ||
109 | } | ||
110 | status = AE_ERROR; | ||
111 | goto out_kfree; | ||
112 | } | ||
113 | out_success: | ||
114 | *retval = *((u32 *)(out_obj->buffer.pointer + 8)); | ||
115 | status = AE_OK; | ||
116 | |||
117 | out_kfree: | ||
118 | kfree(output.pointer); | ||
119 | return status; | ||
120 | } | ||
121 | |||
122 | static acpi_status __acpi_query_osc(u32 flags, struct acpi_osc_data *osc_data) | ||
123 | { | ||
124 | acpi_status status; | ||
125 | u32 support_set, result; | ||
126 | struct acpi_osc_args osc_args; | ||
127 | |||
128 | /* do _OSC query for all possible controls */ | ||
129 | support_set = osc_data->support_set | (flags & OSC_SUPPORT_MASKS); | ||
130 | osc_args.capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; | ||
131 | osc_args.capbuf[OSC_SUPPORT_TYPE] = support_set; | ||
132 | osc_args.capbuf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS; | ||
133 | |||
134 | status = acpi_run_osc(osc_data->handle, &osc_args, &result); | ||
135 | if (ACPI_SUCCESS(status)) { | ||
136 | osc_data->support_set = support_set; | ||
137 | osc_data->control_query = result; | ||
138 | osc_data->is_queried = 1; | ||
139 | } | ||
140 | |||
141 | return status; | ||
142 | } | ||
143 | |||
144 | /* | ||
145 | * pci_acpi_osc_support: Invoke _OSC indicating support for the given feature | ||
146 | * @flags: Bitmask of flags to support | ||
147 | * | ||
148 | * See the ACPI spec for the definition of the flags | ||
149 | */ | ||
150 | int pci_acpi_osc_support(acpi_handle handle, u32 flags) | ||
151 | { | ||
152 | acpi_status status; | ||
153 | acpi_handle tmp; | ||
154 | struct acpi_osc_data *osc_data; | ||
155 | int rc = 0; | ||
156 | |||
157 | status = acpi_get_handle(handle, "_OSC", &tmp); | ||
158 | if (ACPI_FAILURE(status)) | ||
159 | return -ENOTTY; | ||
160 | |||
161 | mutex_lock(&pci_acpi_lock); | ||
162 | osc_data = acpi_get_osc_data(handle); | ||
163 | if (!osc_data) { | ||
164 | printk(KERN_ERR "acpi osc data array is full\n"); | ||
165 | rc = -ENOMEM; | ||
166 | goto out; | ||
167 | } | ||
168 | |||
169 | __acpi_query_osc(flags, osc_data); | ||
170 | out: | ||
171 | mutex_unlock(&pci_acpi_lock); | ||
172 | return rc; | ||
173 | } | ||
174 | |||
175 | /** | ||
176 | * pci_osc_control_set - commit requested control to Firmware | ||
177 | * @handle: acpi_handle for the target ACPI object | ||
178 | * @flags: driver's requested control bits | ||
179 | * | ||
180 | * Attempt to take control from Firmware on requested control bits. | ||
181 | **/ | ||
182 | acpi_status pci_osc_control_set(acpi_handle handle, u32 flags) | ||
183 | { | ||
184 | acpi_status status; | ||
185 | u32 control_req, control_set, result; | ||
186 | acpi_handle tmp; | ||
187 | struct acpi_osc_data *osc_data; | ||
188 | struct acpi_osc_args osc_args; | ||
189 | |||
190 | status = acpi_get_handle(handle, "_OSC", &tmp); | ||
191 | if (ACPI_FAILURE(status)) | ||
192 | return status; | ||
193 | |||
194 | mutex_lock(&pci_acpi_lock); | ||
195 | osc_data = acpi_get_osc_data(handle); | ||
196 | if (!osc_data) { | ||
197 | printk(KERN_ERR "acpi osc data array is full\n"); | ||
198 | status = AE_ERROR; | ||
199 | goto out; | ||
200 | } | ||
201 | |||
202 | control_req = (flags & OSC_CONTROL_MASKS); | ||
203 | if (!control_req) { | ||
204 | status = AE_TYPE; | ||
205 | goto out; | ||
206 | } | ||
207 | |||
208 | /* No need to evaluate _OSC if the control was already granted. */ | ||
209 | if ((osc_data->control_set & control_req) == control_req) | ||
210 | goto out; | ||
211 | |||
212 | if (!osc_data->is_queried) { | ||
213 | status = __acpi_query_osc(osc_data->support_set, osc_data); | ||
214 | if (ACPI_FAILURE(status)) | ||
215 | goto out; | ||
216 | } | ||
217 | |||
218 | if ((osc_data->control_query & control_req) != control_req) { | ||
219 | status = AE_SUPPORT; | ||
220 | goto out; | ||
221 | } | ||
222 | |||
223 | control_set = osc_data->control_set | control_req; | ||
224 | osc_args.capbuf[OSC_QUERY_TYPE] = 0; | ||
225 | osc_args.capbuf[OSC_SUPPORT_TYPE] = osc_data->support_set; | ||
226 | osc_args.capbuf[OSC_CONTROL_TYPE] = control_set; | ||
227 | status = acpi_run_osc(handle, &osc_args, &result); | ||
228 | if (ACPI_SUCCESS(status)) | ||
229 | osc_data->control_set = result; | ||
230 | out: | ||
231 | mutex_unlock(&pci_acpi_lock); | ||
232 | return status; | ||
233 | } | ||
234 | EXPORT_SYMBOL(pci_osc_control_set); | ||
235 | |||
236 | /* | 21 | /* |
237 | * _SxD returns the D-state with the highest power | 22 | * _SxD returns the D-state with the highest power |
238 | * (lowest D-state number) supported in the S-state "x". | 23 | * (lowest D-state number) supported in the S-state "x". |