PCI/ACPI: move _OSC code to pci_root.c
Move PCI _OSC management code from drivers/pci/pci-acpi.c to drivers/acpi/pci_root.c. The benefits are - We no longer need struct osc_data and its management code (contents are moved to struct acpi_pci_root). This simplify the code, and we no longer care about kmalloc() failure. - We can make pci_acpi_osc_support() be a static function, which is called only from drivers/acpi/pci_root.c. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Reviewed-by: Andrew Patterson <andrew.patterson@hp.com> Tested-by: Andrew Patterson <andrew.patterson@hp.com> Acked-by: Alex Chiang <achiang@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Kenji Kaneshige
Jesse Barnes
parent
5fe5db05f6
commit
63f10f0f6d
@ -66,11 +66,18 @@ struct acpi_pci_root {
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struct acpi_device * device;
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struct acpi_pci_id id;
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struct pci_bus *bus;
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u32 osc_support_set; /* _OSC state of support bits */
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u32 osc_control_set; /* _OSC state of control bits */
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u32 osc_control_qry; /* the latest _OSC query result */
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u32 osc_queried:1; /* has _OSC control been queried? */
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};
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static LIST_HEAD(acpi_pci_roots);
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static struct acpi_pci_driver *sub_driver;
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static DEFINE_MUTEX(osc_lock);
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int acpi_pci_register_driver(struct acpi_pci_driver *driver)
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{
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@ -185,6 +192,175 @@ static void acpi_pci_bridge_scan(struct acpi_device *device)
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}
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}
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static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40,
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0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66};
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static acpi_status acpi_pci_run_osc(acpi_handle handle,
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const u32 *capbuf, u32 *retval)
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{
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acpi_status status;
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struct acpi_object_list input;
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union acpi_object in_params[4];
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struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
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union acpi_object *out_obj;
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u32 errors;
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/* Setting up input parameters */
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input.count = 4;
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input.pointer = in_params;
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in_params[0].type = ACPI_TYPE_BUFFER;
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in_params[0].buffer.length = 16;
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in_params[0].buffer.pointer = OSC_UUID;
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in_params[1].type = ACPI_TYPE_INTEGER;
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in_params[1].integer.value = 1;
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in_params[2].type = ACPI_TYPE_INTEGER;
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in_params[2].integer.value = 3;
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in_params[3].type = ACPI_TYPE_BUFFER;
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in_params[3].buffer.length = 12;
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in_params[3].buffer.pointer = (u8 *)capbuf;
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status = acpi_evaluate_object(handle, "_OSC", &input, &output);
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if (ACPI_FAILURE(status))
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return status;
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if (!output.length)
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return AE_NULL_OBJECT;
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out_obj = output.pointer;
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if (out_obj->type != ACPI_TYPE_BUFFER) {
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printk(KERN_DEBUG "_OSC evaluation returned wrong type\n");
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status = AE_TYPE;
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goto out_kfree;
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}
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/* Need to ignore the bit0 in result code */
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errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
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if (errors) {
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if (errors & OSC_REQUEST_ERROR)
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printk(KERN_DEBUG "_OSC request failed\n");
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if (errors & OSC_INVALID_UUID_ERROR)
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printk(KERN_DEBUG "_OSC invalid UUID\n");
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if (errors & OSC_INVALID_REVISION_ERROR)
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printk(KERN_DEBUG "_OSC invalid revision\n");
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if (errors & OSC_CAPABILITIES_MASK_ERROR) {
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if (capbuf[OSC_QUERY_TYPE] & OSC_QUERY_ENABLE)
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goto out_success;
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printk(KERN_DEBUG
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"Firmware did not grant requested _OSC control\n");
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status = AE_SUPPORT;
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goto out_kfree;
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}
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status = AE_ERROR;
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goto out_kfree;
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}
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out_success:
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*retval = *((u32 *)(out_obj->buffer.pointer + 8));
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status = AE_OK;
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out_kfree:
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kfree(output.pointer);
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return status;
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}
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static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, u32 flags)
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{
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acpi_status status;
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u32 support_set, result, capbuf[3];
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/* do _OSC query for all possible controls */
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support_set = root->osc_support_set | (flags & OSC_SUPPORT_MASKS);
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capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
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capbuf[OSC_SUPPORT_TYPE] = support_set;
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capbuf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
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status = acpi_pci_run_osc(root->device->handle, capbuf, &result);
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if (ACPI_SUCCESS(status)) {
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root->osc_support_set = support_set;
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root->osc_control_qry = result;
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root->osc_queried = 1;
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}
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return status;
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}
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static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)
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{
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acpi_status status;
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acpi_handle tmp;
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status = acpi_get_handle(root->device->handle, "_OSC", &tmp);
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if (ACPI_FAILURE(status))
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return status;
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mutex_lock(&osc_lock);
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status = acpi_pci_query_osc(root, flags);
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mutex_unlock(&osc_lock);
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return status;
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}
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static struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
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{
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struct acpi_pci_root *root;
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list_for_each_entry(root, &acpi_pci_roots, node) {
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if (root->device->handle == handle)
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return root;
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}
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return NULL;
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}
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/**
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* pci_osc_control_set - commit requested control to Firmware
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* @handle: acpi_handle for the target ACPI object
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* @flags: driver's requested control bits
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*
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* Attempt to take control from Firmware on requested control bits.
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**/
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acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
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{
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acpi_status status;
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u32 control_req, result, capbuf[3];
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acpi_handle tmp;
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struct acpi_pci_root *root;
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status = acpi_get_handle(handle, "_OSC", &tmp);
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if (ACPI_FAILURE(status))
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return status;
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control_req = (flags & OSC_CONTROL_MASKS);
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if (!control_req)
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return AE_TYPE;
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root = acpi_pci_find_root(handle);
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if (!root)
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return AE_NOT_EXIST;
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mutex_lock(&osc_lock);
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/* No need to evaluate _OSC if the control was already granted. */
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if ((root->osc_control_set & control_req) == control_req)
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goto out;
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/* Need to query controls first before requesting them */
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if (!root->osc_queried) {
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status = acpi_pci_query_osc(root, root->osc_support_set);
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if (ACPI_FAILURE(status))
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goto out;
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}
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if ((root->osc_control_qry & control_req) != control_req) {
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printk(KERN_DEBUG
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"Firmware did not grant requested _OSC control\n");
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status = AE_SUPPORT;
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goto out;
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}
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capbuf[OSC_QUERY_TYPE] = 0;
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capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set;
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capbuf[OSC_CONTROL_TYPE] = root->osc_control_set | control_req;
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status = acpi_pci_run_osc(handle, capbuf, &result);
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if (ACPI_SUCCESS(status))
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root->osc_control_set = result;
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out:
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mutex_unlock(&osc_lock);
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return status;
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}
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EXPORT_SYMBOL(pci_osc_control_set);
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static int __devinit acpi_pci_root_add(struct acpi_device *device)
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{
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int result = 0;
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@ -217,7 +393,7 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
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* PCI domains, so we indicate this in _OSC support capabilities.
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*/
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flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT;
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pci_acpi_osc_support(device->handle, flags);
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acpi_pci_osc_support(root, flags);
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/*
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* Segment
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@ -353,7 +529,7 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
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if (pci_msi_enabled())
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flags |= OSC_MSI_SUPPORT;
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if (flags != base_flags)
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pci_acpi_osc_support(device->handle, flags);
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acpi_pci_osc_support(root, flags);
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end:
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if (result) {
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@ -18,221 +18,6 @@
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#include <linux/pci-acpi.h>
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#include "pci.h"
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struct acpi_osc_data {
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acpi_handle handle;
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u32 support_set;
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u32 control_set;
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u32 control_query;
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int is_queried;
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struct list_head sibiling;
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};
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static LIST_HEAD(acpi_osc_data_list);
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struct acpi_osc_args {
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u32 capbuf[3];
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};
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static DEFINE_MUTEX(pci_acpi_lock);
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static struct acpi_osc_data *acpi_get_osc_data(acpi_handle handle)
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{
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struct acpi_osc_data *data;
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list_for_each_entry(data, &acpi_osc_data_list, sibiling) {
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if (data->handle == handle)
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return data;
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}
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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if (!data)
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return NULL;
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INIT_LIST_HEAD(&data->sibiling);
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data->handle = handle;
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list_add_tail(&data->sibiling, &acpi_osc_data_list);
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return data;
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}
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static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40,
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0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66};
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static acpi_status acpi_run_osc(acpi_handle handle,
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struct acpi_osc_args *osc_args, u32 *retval)
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{
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acpi_status status;
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struct acpi_object_list input;
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union acpi_object in_params[4];
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struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
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union acpi_object *out_obj;
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u32 errors, flags = osc_args->capbuf[OSC_QUERY_TYPE];
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/* Setting up input parameters */
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input.count = 4;
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input.pointer = in_params;
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in_params[0].type = ACPI_TYPE_BUFFER;
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in_params[0].buffer.length = 16;
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in_params[0].buffer.pointer = OSC_UUID;
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in_params[1].type = ACPI_TYPE_INTEGER;
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in_params[1].integer.value = 1;
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in_params[2].type = ACPI_TYPE_INTEGER;
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in_params[2].integer.value = 3;
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in_params[3].type = ACPI_TYPE_BUFFER;
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in_params[3].buffer.length = 12;
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in_params[3].buffer.pointer = (u8 *)osc_args->capbuf;
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status = acpi_evaluate_object(handle, "_OSC", &input, &output);
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if (ACPI_FAILURE(status))
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return status;
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if (!output.length)
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return AE_NULL_OBJECT;
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out_obj = output.pointer;
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if (out_obj->type != ACPI_TYPE_BUFFER) {
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printk(KERN_DEBUG "Evaluate _OSC returns wrong type\n");
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status = AE_TYPE;
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goto out_kfree;
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}
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/* Need to ignore the bit0 in result code */
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errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
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if (errors) {
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if (errors & OSC_REQUEST_ERROR)
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printk(KERN_DEBUG "_OSC request fails\n");
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if (errors & OSC_INVALID_UUID_ERROR)
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printk(KERN_DEBUG "_OSC invalid UUID\n");
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if (errors & OSC_INVALID_REVISION_ERROR)
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printk(KERN_DEBUG "_OSC invalid revision\n");
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if (errors & OSC_CAPABILITIES_MASK_ERROR) {
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if (flags & OSC_QUERY_ENABLE)
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goto out_success;
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printk(KERN_DEBUG "_OSC FW not grant req. control\n");
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status = AE_SUPPORT;
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goto out_kfree;
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}
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status = AE_ERROR;
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goto out_kfree;
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}
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out_success:
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*retval = *((u32 *)(out_obj->buffer.pointer + 8));
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status = AE_OK;
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out_kfree:
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kfree(output.pointer);
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return status;
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}
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static acpi_status __acpi_query_osc(u32 flags, struct acpi_osc_data *osc_data)
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{
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acpi_status status;
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u32 support_set, result;
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struct acpi_osc_args osc_args;
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/* do _OSC query for all possible controls */
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support_set = osc_data->support_set | (flags & OSC_SUPPORT_MASKS);
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osc_args.capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
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osc_args.capbuf[OSC_SUPPORT_TYPE] = support_set;
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osc_args.capbuf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
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status = acpi_run_osc(osc_data->handle, &osc_args, &result);
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if (ACPI_SUCCESS(status)) {
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osc_data->support_set = support_set;
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osc_data->control_query = result;
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osc_data->is_queried = 1;
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}
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return status;
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}
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/*
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* pci_acpi_osc_support: Invoke _OSC indicating support for the given feature
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* @flags: Bitmask of flags to support
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*
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* See the ACPI spec for the definition of the flags
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*/
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int pci_acpi_osc_support(acpi_handle handle, u32 flags)
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{
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acpi_status status;
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acpi_handle tmp;
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struct acpi_osc_data *osc_data;
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int rc = 0;
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status = acpi_get_handle(handle, "_OSC", &tmp);
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if (ACPI_FAILURE(status))
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return -ENOTTY;
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mutex_lock(&pci_acpi_lock);
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osc_data = acpi_get_osc_data(handle);
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if (!osc_data) {
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printk(KERN_ERR "acpi osc data array is full\n");
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rc = -ENOMEM;
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goto out;
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}
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__acpi_query_osc(flags, osc_data);
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out:
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mutex_unlock(&pci_acpi_lock);
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return rc;
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}
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/**
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* pci_osc_control_set - commit requested control to Firmware
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* @handle: acpi_handle for the target ACPI object
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* @flags: driver's requested control bits
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*
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* Attempt to take control from Firmware on requested control bits.
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**/
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acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
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{
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acpi_status status;
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u32 control_req, control_set, result;
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acpi_handle tmp;
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struct acpi_osc_data *osc_data;
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struct acpi_osc_args osc_args;
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status = acpi_get_handle(handle, "_OSC", &tmp);
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if (ACPI_FAILURE(status))
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return status;
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mutex_lock(&pci_acpi_lock);
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osc_data = acpi_get_osc_data(handle);
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if (!osc_data) {
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printk(KERN_ERR "acpi osc data array is full\n");
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status = AE_ERROR;
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goto out;
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}
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control_req = (flags & OSC_CONTROL_MASKS);
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if (!control_req) {
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status = AE_TYPE;
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goto out;
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}
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/* No need to evaluate _OSC if the control was already granted. */
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if ((osc_data->control_set & control_req) == control_req)
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goto out;
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if (!osc_data->is_queried) {
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status = __acpi_query_osc(osc_data->support_set, osc_data);
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if (ACPI_FAILURE(status))
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goto out;
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}
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if ((osc_data->control_query & control_req) != control_req) {
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status = AE_SUPPORT;
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goto out;
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}
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control_set = osc_data->control_set | control_req;
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osc_args.capbuf[OSC_QUERY_TYPE] = 0;
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osc_args.capbuf[OSC_SUPPORT_TYPE] = osc_data->support_set;
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osc_args.capbuf[OSC_CONTROL_TYPE] = control_set;
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status = acpi_run_osc(handle, &osc_args, &result);
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if (ACPI_SUCCESS(status))
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osc_data->control_set = result;
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out:
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mutex_unlock(&pci_acpi_lock);
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return status;
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}
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EXPORT_SYMBOL(pci_osc_control_set);
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/*
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* _SxD returns the D-state with the highest power
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* (lowest D-state number) supported in the S-state "x".
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@ -50,7 +50,6 @@
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#ifdef CONFIG_ACPI
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extern acpi_status pci_osc_control_set(acpi_handle handle, u32 flags);
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int pci_acpi_osc_support(acpi_handle handle, u32 flags);
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static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
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{
|
||||
/* Find root host bridge */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user