diff options
| -rw-r--r-- | drivers/acpi/bus.c | 148 | ||||
| -rw-r--r-- | drivers/acpi/pci_root.c | 76 | ||||
| -rw-r--r-- | include/linux/acpi.h | 21 |
3 files changed, 181 insertions, 64 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 741191524353..65f7e335f122 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -344,6 +344,152 @@ bool acpi_bus_can_wakeup(acpi_handle handle) EXPORT_SYMBOL(acpi_bus_can_wakeup); +static void acpi_print_osc_error(acpi_handle handle, + struct acpi_osc_context *context, char *error) +{ + struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; + int i; + + if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) + printk(KERN_DEBUG "%s\n", error); + else { + printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error); + kfree(buffer.pointer); + } + printk(KERN_DEBUG"_OSC request data:"); + for (i = 0; i < context->cap.length; i += sizeof(u32)) + printk("%x ", *((u32 *)(context->cap.pointer + i))); + printk("\n"); +} + +static u8 hex_val(unsigned char c) +{ + return isdigit(c) ? c - '0' : toupper(c) - 'A' + 10; +} + +static acpi_status acpi_str_to_uuid(char *str, u8 *uuid) +{ + int i; + static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, + 24, 26, 28, 30, 32, 34}; + + if (strlen(str) != 36) + return AE_BAD_PARAMETER; + for (i = 0; i < 36; i++) { + if (i == 8 || i == 13 || i == 18 || i == 23) { + if (str[i] != '-') + return AE_BAD_PARAMETER; + } else if (!isxdigit(str[i])) + return AE_BAD_PARAMETER; + } + for (i = 0; i < 16; i++) { + uuid[i] = hex_val(str[opc_map_to_uuid[i]]) << 4; + uuid[i] |= hex_val(str[opc_map_to_uuid[i] + 1]); + } + return AE_OK; +} + +acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) +{ + acpi_status status; + struct acpi_object_list input; + union acpi_object in_params[4]; + union acpi_object *out_obj; + u8 uuid[16]; + u32 errors; + + if (!context) + return AE_ERROR; + if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) + return AE_ERROR; + context->ret.length = ACPI_ALLOCATE_BUFFER; + context->ret.pointer = NULL; + + /* Setting up input parameters */ + input.count = 4; + input.pointer = in_params; + in_params[0].type = ACPI_TYPE_BUFFER; + in_params[0].buffer.length = 16; + in_params[0].buffer.pointer = uuid; + in_params[1].type = ACPI_TYPE_INTEGER; + in_params[1].integer.value = context->rev; + in_params[2].type = ACPI_TYPE_INTEGER; + in_params[2].integer.value = context->cap.length/sizeof(u32); + in_params[3].type = ACPI_TYPE_BUFFER; + in_params[3].buffer.length = context->cap.length; + in_params[3].buffer.pointer = context->cap.pointer; + + status = acpi_evaluate_object(handle, "_OSC", &input, &context->ret); + if (ACPI_FAILURE(status)) + return status; + + /* return buffer should have the same length as cap buffer */ + if (context->ret.length != context->cap.length) + return AE_NULL_OBJECT; + + out_obj = context->ret.pointer; + if (out_obj->type != ACPI_TYPE_BUFFER) { + acpi_print_osc_error(handle, context, + "_OSC evaluation returned wrong type"); + status = AE_TYPE; + goto out_kfree; + } + /* Need to ignore the bit0 in result code */ + errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); + if (errors) { + if (errors & OSC_REQUEST_ERROR) + acpi_print_osc_error(handle, context, + "_OSC request failed"); + if (errors & OSC_INVALID_UUID_ERROR) + acpi_print_osc_error(handle, context, + "_OSC invalid UUID"); + if (errors & OSC_INVALID_REVISION_ERROR) + acpi_print_osc_error(handle, context, + "_OSC invalid revision"); + if (errors & OSC_CAPABILITIES_MASK_ERROR) { + if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE] + & OSC_QUERY_ENABLE) + goto out_success; + status = AE_SUPPORT; + goto out_kfree; + } + status = AE_ERROR; + goto out_kfree; + } +out_success: + return AE_OK; + +out_kfree: + kfree(context->ret.pointer); + context->ret.pointer = NULL; + return status; +} +EXPORT_SYMBOL(acpi_run_osc); + +static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; +static void acpi_bus_osc_support(void) +{ + u32 capbuf[2]; + struct acpi_osc_context context = { + .uuid_str = sb_uuid_str, + .rev = 1, + .cap.length = 8, + .cap.pointer = capbuf, + }; + acpi_handle handle; + + capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; + capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ +#ifdef CONFIG_ACPI_PROCESSOR_AGGREGATOR + capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT; +#endif + if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) + return; + if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) + kfree(context.ret.pointer); + /* do we need to check the returned cap? Sounds no */ +} + /* -------------------------------------------------------------------------- Event Management -------------------------------------------------------------------------- */ @@ -734,6 +880,8 @@ static int __init acpi_bus_init(void) status = acpi_ec_ecdt_probe(); /* Ignore result. Not having an ECDT is not fatal. */ + acpi_bus_osc_support(); + status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index 1af808171d46..101cce3681d1 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -202,72 +202,24 @@ static void acpi_pci_bridge_scan(struct acpi_device *device) } } -static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40, - 0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66}; +static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766"; static acpi_status acpi_pci_run_osc(acpi_handle handle, const u32 *capbuf, u32 *retval) { + struct acpi_osc_context context = { + .uuid_str = pci_osc_uuid_str, + .rev = 1, + .cap.length = 12, + .cap.pointer = (void *)capbuf, + }; acpi_status status; - struct acpi_object_list input; - union acpi_object in_params[4]; - struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; - union acpi_object *out_obj; - u32 errors; - - /* Setting up input parameters */ - input.count = 4; - input.pointer = in_params; - in_params[0].type = ACPI_TYPE_BUFFER; - in_params[0].buffer.length = 16; - in_params[0].buffer.pointer = OSC_UUID; - in_params[1].type = ACPI_TYPE_INTEGER; - in_params[1].integer.value = 1; - in_params[2].type = ACPI_TYPE_INTEGER; - in_params[2].integer.value = 3; - in_params[3].type = ACPI_TYPE_BUFFER; - in_params[3].buffer.length = 12; - in_params[3].buffer.pointer = (u8 *)capbuf; - - status = acpi_evaluate_object(handle, "_OSC", &input, &output); - if (ACPI_FAILURE(status)) - return status; - if (!output.length) - return AE_NULL_OBJECT; - - out_obj = output.pointer; - if (out_obj->type != ACPI_TYPE_BUFFER) { - printk(KERN_DEBUG "_OSC evaluation returned wrong type\n"); - status = AE_TYPE; - goto out_kfree; - } - /* Need to ignore the bit0 in result code */ - errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); - if (errors) { - if (errors & OSC_REQUEST_ERROR) - printk(KERN_DEBUG "_OSC request failed\n"); - if (errors & OSC_INVALID_UUID_ERROR) - printk(KERN_DEBUG "_OSC invalid UUID\n"); - if (errors & OSC_INVALID_REVISION_ERROR) - printk(KERN_DEBUG "_OSC invalid revision\n"); - if (errors & OSC_CAPABILITIES_MASK_ERROR) { - if (capbuf[OSC_QUERY_TYPE] & OSC_QUERY_ENABLE) - goto out_success; - printk(KERN_DEBUG - "Firmware did not grant requested _OSC control\n"); - status = AE_SUPPORT; - goto out_kfree; - } - status = AE_ERROR; - goto out_kfree; + status = acpi_run_osc(handle, &context); + if (ACPI_SUCCESS(status)) { + *retval = *((u32 *)(context.ret.pointer + 8)); + kfree(context.ret.pointer); } -out_success: - *retval = *((u32 *)(out_obj->buffer.pointer + 8)); - status = AE_OK; - -out_kfree: - kfree(output.pointer); return status; } @@ -277,10 +229,10 @@ static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, u32 flags) u32 support_set, result, capbuf[3]; /* do _OSC query for all possible controls */ - support_set = root->osc_support_set | (flags & OSC_SUPPORT_MASKS); + support_set = root->osc_support_set | (flags & OSC_PCI_SUPPORT_MASKS); capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; capbuf[OSC_SUPPORT_TYPE] = support_set; - capbuf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS; + capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS; status = acpi_pci_run_osc(root->device->handle, capbuf, &result); if (ACPI_SUCCESS(status)) { @@ -427,7 +379,7 @@ acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags) if (ACPI_FAILURE(status)) return status; - control_req = (flags & OSC_CONTROL_MASKS); + control_req = (flags & OSC_PCI_CONTROL_MASKS); if (!control_req) return AE_TYPE; diff --git a/include/linux/acpi.h b/include/linux/acpi.h index dfcd920c3e54..e11090d462d2 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -253,10 +253,16 @@ void __init acpi_old_suspend_ordering(void); void __init acpi_s4_no_nvs(void); #endif /* CONFIG_PM_SLEEP */ +struct acpi_osc_context { + char *uuid_str; /* uuid string */ + int rev; + struct acpi_buffer cap; /* arg2/arg3 */ + struct acpi_buffer ret; /* free by caller if success */ +}; + #define OSC_QUERY_TYPE 0 #define OSC_SUPPORT_TYPE 1 #define OSC_CONTROL_TYPE 2 -#define OSC_SUPPORT_MASKS 0x1f /* _OSC DW0 Definition */ #define OSC_QUERY_ENABLE 1 @@ -265,12 +271,23 @@ void __init acpi_s4_no_nvs(void); #define OSC_INVALID_REVISION_ERROR 8 #define OSC_CAPABILITIES_MASK_ERROR 16 +acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context); + +/* platform-wide _OSC bits */ +#define OSC_SB_PAD_SUPPORT 1 +#define OSC_SB_PPC_OST_SUPPORT 2 +#define OSC_SB_PR3_SUPPORT 4 +#define OSC_SB_CPUHP_OST_SUPPORT 8 +#define OSC_SB_APEI_SUPPORT 16 + +/* PCI defined _OSC bits */ /* _OSC DW1 Definition (OS Support Fields) */ #define OSC_EXT_PCI_CONFIG_SUPPORT 1 #define OSC_ACTIVE_STATE_PWR_SUPPORT 2 #define OSC_CLOCK_PWR_CAPABILITY_SUPPORT 4 #define OSC_PCI_SEGMENT_GROUPS_SUPPORT 8 #define OSC_MSI_SUPPORT 16 +#define OSC_PCI_SUPPORT_MASKS 0x1f /* _OSC DW1 Definition (OS Control Fields) */ #define OSC_PCI_EXPRESS_NATIVE_HP_CONTROL 1 @@ -279,7 +296,7 @@ void __init acpi_s4_no_nvs(void); #define OSC_PCI_EXPRESS_AER_CONTROL 8 #define OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL 16 -#define OSC_CONTROL_MASKS (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | \ +#define OSC_PCI_CONTROL_MASKS (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | \ OSC_SHPC_NATIVE_HP_CONTROL | \ OSC_PCI_EXPRESS_PME_CONTROL | \ OSC_PCI_EXPRESS_AER_CONTROL | \ |