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PCI: PCIe portdrv: Add kerneldoc comments to some core functions 

Add kerneldoc comments to some functions in
drivers/pci/pcie/portdrv_core.c, since the code in there is not
easy to follow without any additional description.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Rafael J. Wysocki 2009-01-01 19:48:55 +01:00 committed by Jesse Barnes
parent 16cf0ebc35
commit facf6d1627
1 changed files with 70 additions and 7 deletions
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77
drivers/pci/pcie/portdrv_core.c
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@ -94,12 +94,12 @@ static int pcie_port_resume_service(struct device *dev)
return 0;
}
/*
* release_pcie_device
*
* Being invoked automatically when device is being removed
* in response to device_unregister(dev) call.
* Release all resources being claimed.
/**
* release_pcie_device - free PCI Express port service device structure
* @dev: Port service device to release
*
* Invoked automatically when device is being removed in response to
* device_unregister(dev). Release all resources being claimed.
*/
static void release_pcie_device(struct device *dev)
{
@ -127,7 +127,16 @@ static int is_msi_quirked(struct pci_dev *dev)
}
return quirk;
}
/**
* assign_interrupt_mode - choose interrupt mode for PCI Express port services
* (INTx, MSI-X, MSI) and set up vectors
* @dev: PCI Express port to handle
* @vectors: Array of interrupt vectors to populate
* @mask: Bitmask of port capabilities returned by get_port_device_capability()
*
* Return value: Interrupt mode associated with the port
*/
static int assign_interrupt_mode(struct pci_dev *dev, int *vectors, int mask)
{
int i, pos, nvec, status = -EINVAL;
@ -174,6 +183,16 @@ static int assign_interrupt_mode(struct pci_dev *dev, int *vectors, int mask)
return interrupt_mode;
}
/**
* get_port_device_capability - discover capabilities of a PCI Express port
* @dev: PCI Express port to examine
*
* The capabilities are read from the port's PCI Express configuration registers
* as described in PCI Express Base Specification 1.0a sections 7.8.2, 7.8.9 and
* 7.9 - 7.11.
*
* Return value: Bitmask of discovered port capabilities
*/
static int get_port_device_capability(struct pci_dev *dev)
{
int services = 0, pos;
@ -201,6 +220,15 @@ static int get_port_device_capability(struct pci_dev *dev)
return services;
}
/**
* pcie_device_init - initialize PCI Express port service device
* @dev: Port service device to initialize
* @parent: PCI Express port to associate the service device with
* @port_type: Type of the port
* @service_type: Type of service to associate with the service device
* @irq: Interrupt vector to associate with the service device
* @irq_mode: Interrupt mode of the service (INTx, MSI-X, MSI)
*/
static void pcie_device_init(struct pci_dev *parent, struct pcie_device *dev,
int port_type, int service_type, int irq, int irq_mode)
{
@ -226,6 +254,14 @@ static void pcie_device_init(struct pci_dev *parent, struct pcie_device *dev,
device->parent = &parent->dev;
}
/**
* alloc_pcie_device - allocate PCI Express port service device structure
* @parent: PCI Express port to associate the service device with
* @port_type: Type of the port
* @service_type: Type of service to associate with the service device
* @irq: Interrupt vector to associate with the service device
* @irq_mode: Interrupt mode of the service (INTx, MSI-X, MSI)
*/
static struct pcie_device* alloc_pcie_device(struct pci_dev *parent,
int port_type, int service_type, int irq, int irq_mode)
{
@ -239,6 +275,10 @@ static struct pcie_device* alloc_pcie_device(struct pci_dev *parent,
return device;
}
/**
* pcie_port_device_probe - check if device is a PCI Express port
* @dev: Device to check
*/
int pcie_port_device_probe(struct pci_dev *dev)
{
int pos, type;
@ -256,6 +296,13 @@ int pcie_port_device_probe(struct pci_dev *dev)
return -ENODEV;
}
/**
* pcie_port_device_register - register PCI Express port
* @dev: PCI Express port to register
*
* Allocate the port extension structure and register services associated with
* the port.
*/
int pcie_port_device_register(struct pci_dev *dev)
{
struct pcie_port_device_ext *p_ext;
@ -319,6 +366,11 @@ static int suspend_iter(struct device *dev, void *data)
return 0;
}
/**
* pcie_port_device_suspend - suspend port services associated with a PCIe port
* @dev: PCI Express port to handle
* @state: Representation of system power management transition in progress
*/
int pcie_port_device_suspend(struct pci_dev *dev, pm_message_t state)
{
return device_for_each_child(&dev->dev, &state, suspend_iter);
@ -337,6 +389,10 @@ static int resume_iter(struct device *dev, void *data)
return 0;
}
/**
* pcie_port_device_suspend - resume port services associated with a PCIe port
* @dev: PCI Express port to handle
*/
int pcie_port_device_resume(struct pci_dev *dev)
{
return device_for_each_child(&dev->dev, NULL, resume_iter);
@ -359,6 +415,13 @@ static int remove_iter(struct device *dev, void *data)
return 0;
}
/**
* pcie_port_device_remove - unregister PCI Express port service devices
* @dev: PCI Express port the service devices to unregister are associated with
*
* Remove PCI Express port service devices associated with given port and
* disable MSI-X or MSI for the port.
*/
void pcie_port_device_remove(struct pci_dev *dev)
{
struct device *device;