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Commit b5bc980a authored by Martyn Welch's avatar Martyn Welch Committed by Greg Kroah-Hartman
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docs: Add kernel-doc comments to VME driver API 

Add kernel-doc comments to the VME driver API and structures. This
documentation will be integrated into the RST documentation in a later
patch.
Signed-off-by: default avatarMartyn Welch <martyn.welch@collabora.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5cd5e6ad
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Showing with 449 additions and 32 deletions
drivers/vme/vme.c
View file @ b5bc980a
......@@ -76,9 +76,16 @@ static struct vme_bridge *find_bridge(struct vme_resource *resource)
}
}
/*
/**
* vme_free_consistent - Allocate contiguous memory.
* @resource: Pointer to VME resource.
* @size: Size of allocation required.
* @dma: Pointer to variable to store physical address of allocation.
*
* Allocate a contiguous block of memory for use by the driver. This is used to
* create the buffers for the slave windows.
*
* Return: Virtual address of allocation on success, NULL on failure.
*/
void *vme_alloc_consistent(struct vme_resource *resource, size_t size,
dma_addr_t *dma)
......@@ -111,8 +118,14 @@ void *vme_alloc_consistent(struct vme_resource *resource, size_t size,
}
EXPORT_SYMBOL(vme_alloc_consistent);
/*
* Free previously allocated contiguous block of memory.
/**
* vme_free_consistent - Free previously allocated memory.
* @resource: Pointer to VME resource.
* @size: Size of allocation to free.
* @vaddr: Virtual address of allocation.
* @dma: Physical address of allocation.
*
* Free previously allocated block of contiguous memory.
*/
void vme_free_consistent(struct vme_resource *resource, size_t size,
void *vaddr, dma_addr_t dma)
......@@ -145,6 +158,16 @@ void vme_free_consistent(struct vme_resource *resource, size_t size,
}
EXPORT_SYMBOL(vme_free_consistent);
/**
* vme_get_size - Helper function returning size of a VME window
* @resource: Pointer to VME slave or master resource.
*
* Determine the size of the VME window provided. This is a helper
* function, wrappering the call to vme_master_get or vme_slave_get
* depending on the type of window resource handed to it.
*
* Return: Size of the window on success, zero on failure.
*/
size_t vme_get_size(struct vme_resource *resource)
{
int enabled, retval;
......@@ -259,9 +282,16 @@ static u32 vme_get_aspace(int am)
return 0;
}
/*
* Request a slave image with specific attributes, return some unique
* identifier.
/**
* vme_slave_request - Request a VME slave window resource.
* @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
* @address: Required VME address space.
* @cycle: Required VME data transfer cycle type.
*
* Request use of a VME window resource capable of being set for the requested
* address space and data transfer cycle.
*
* Return: Pointer to VME resource on success, NULL on failure.
*/
struct vme_resource *vme_slave_request(struct vme_dev *vdev, u32 address,
u32 cycle)
......@@ -327,6 +357,23 @@ struct vme_resource *vme_slave_request(struct vme_dev *vdev, u32 address,
}
EXPORT_SYMBOL(vme_slave_request);
/**
* vme_slave_set - Set VME slave window configuration.
* @resource: Pointer to VME slave resource.
* @enabled: State to which the window should be configured.
* @vme_base: Base address for the window.
* @size: Size of the VME window.
* @buf_base: Based address of buffer used to provide VME slave window storage.
* @aspace: VME address space for the VME window.
* @cycle: VME data transfer cycle type for the VME window.
*
* Set configuration for provided VME slave window.
*
* Return: Zero on success, -EINVAL if operation is not supported on this
* device, if an invalid resource has been provided or invalid
* attributes are provided. Hardware specific errors may also be
* returned.
*/
int vme_slave_set(struct vme_resource *resource, int enabled,
unsigned long long vme_base, unsigned long long size,
dma_addr_t buf_base, u32 aspace, u32 cycle)
......@@ -362,6 +409,21 @@ int vme_slave_set(struct vme_resource *resource, int enabled,
}
EXPORT_SYMBOL(vme_slave_set);
/**
* vme_slave_get - Retrieve VME slave window configuration.
* @resource: Pointer to VME slave resource.
* @enabled: Pointer to variable for storing state.
* @vme_base: Pointer to variable for storing window base address.
* @size: Pointer to variable for storing window size.
* @buf_base: Pointer to variable for storing slave buffer base address.
* @aspace: Pointer to variable for storing VME address space.
* @cycle: Pointer to variable for storing VME data transfer cycle type.
*
* Return configuration for provided VME slave window.
*
* Return: Zero on success, -EINVAL if operation is not supported on this
* device or if an invalid resource has been provided.
*/
int vme_slave_get(struct vme_resource *resource, int *enabled,
unsigned long long *vme_base, unsigned long long *size,
dma_addr_t *buf_base, u32 *aspace, u32 *cycle)
......@@ -386,6 +448,12 @@ int vme_slave_get(struct vme_resource *resource, int *enabled,
}
EXPORT_SYMBOL(vme_slave_get);
/**
* vme_slave_free - Free VME slave window
* @resource: Pointer to VME slave resource.
*
* Free the provided slave resource so that it may be reallocated.
*/
void vme_slave_free(struct vme_resource *resource)
{
struct vme_slave_resource *slave_image;
......@@ -415,9 +483,17 @@ void vme_slave_free(struct vme_resource *resource)
}
EXPORT_SYMBOL(vme_slave_free);
/*
* Request a master image with specific attributes, return some unique
* identifier.
/**
* vme_master_request - Request a VME master window resource.
* @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
* @address: Required VME address space.
* @cycle: Required VME data transfer cycle type.
* @dwidth: Required VME data transfer width.
*
* Request use of a VME window resource capable of being set for the requested
* address space, data transfer cycle and width.
*
* Return: Pointer to VME resource on success, NULL on failure.
*/
struct vme_resource *vme_master_request(struct vme_dev *vdev, u32 address,
u32 cycle, u32 dwidth)
......@@ -486,6 +562,23 @@ struct vme_resource *vme_master_request(struct vme_dev *vdev, u32 address,
}
EXPORT_SYMBOL(vme_master_request);
/**
* vme_master_set - Set VME master window configuration.
* @resource: Pointer to VME master resource.
* @enabled: State to which the window should be configured.
* @vme_base: Base address for the window.
* @size: Size of the VME window.
* @aspace: VME address space for the VME window.
* @cycle: VME data transfer cycle type for the VME window.
* @dwidth: VME data transfer width for the VME window.
*
* Set configuration for provided VME master window.
*
* Return: Zero on success, -EINVAL if operation is not supported on this
* device, if an invalid resource has been provided or invalid
* attributes are provided. Hardware specific errors may also be
* returned.
*/
int vme_master_set(struct vme_resource *resource, int enabled,
unsigned long long vme_base, unsigned long long size, u32 aspace,
u32 cycle, u32 dwidth)
......@@ -522,6 +615,21 @@ int vme_master_set(struct vme_resource *resource, int enabled,
}
EXPORT_SYMBOL(vme_master_set);
/**
* vme_master_get - Retrieve VME master window configuration.
* @resource: Pointer to VME master resource.
* @enabled: Pointer to variable for storing state.
* @vme_base: Pointer to variable for storing window base address.
* @size: Pointer to variable for storing window size.
* @aspace: Pointer to variable for storing VME address space.
* @cycle: Pointer to variable for storing VME data transfer cycle type.
* @dwidth: Pointer to variable for storing VME data transfer width.
*
* Return configuration for provided VME master window.
*
* Return: Zero on success, -EINVAL if operation is not supported on this
* device or if an invalid resource has been provided.
*/
int vme_master_get(struct vme_resource *resource, int *enabled,
unsigned long long *vme_base, unsigned long long *size, u32 *aspace,
u32 *cycle, u32 *dwidth)
......@@ -546,8 +654,20 @@ int vme_master_get(struct vme_resource *resource, int *enabled,
}
EXPORT_SYMBOL(vme_master_get);
/*
* Read data out of VME space into a buffer.
/**
* vme_master_write - Read data from VME space into a buffer.
* @resource: Pointer to VME master resource.
* @buf: Pointer to buffer where data should be transferred.
* @count: Number of bytes to transfer.
* @offset: Offset into VME master window at which to start transfer.
*
* Perform read of count bytes of data from location on VME bus which maps into
* the VME master window at offset to buf.
*
* Return: Number of bytes read, -EINVAL if resource is not a VME master
* resource or read operation is not supported. -EFAULT returned if
* invalid offset is provided. Hardware specific errors may also be
* returned.
*/
ssize_t vme_master_read(struct vme_resource *resource, void *buf, size_t count,
loff_t offset)
......@@ -583,8 +703,20 @@ ssize_t vme_master_read(struct vme_resource *resource, void *buf, size_t count,
}
EXPORT_SYMBOL(vme_master_read);
/*
* Write data out to VME space from a buffer.
/**
* vme_master_write - Write data out to VME space from a buffer.
* @resource: Pointer to VME master resource.
* @buf: Pointer to buffer holding data to transfer.
* @count: Number of bytes to transfer.
* @offset: Offset into VME master window at which to start transfer.
*
* Perform write of count bytes of data from buf to location on VME bus which
* maps into the VME master window at offset.
*
* Return: Number of bytes written, -EINVAL if resource is not a VME master
* resource or write operation is not supported. -EFAULT returned if
* invalid offset is provided. Hardware specific errors may also be
* returned.
*/
ssize_t vme_master_write(struct vme_resource *resource, void *buf,
size_t count, loff_t offset)
......@@ -619,8 +751,24 @@ ssize_t vme_master_write(struct vme_resource *resource, void *buf,
}
EXPORT_SYMBOL(vme_master_write);
/*
* Perform RMW cycle to provided location.
/**
* vme_master_rmw - Perform read-modify-write cycle.
* @resource: Pointer to VME master resource.
* @mask: Bits to be compared and swapped in operation.
* @compare: Bits to be compared with data read from offset.
* @swap: Bits to be swapped in data read from offset.
* @offset: Offset into VME master window at which to perform operation.
*
* Perform read-modify-write cycle on provided location:
* - Location on VME bus is read.
* - Bits selected by mask are compared with compare.
* - Where a selected bit matches that in compare and are selected in swap,
* the bit is swapped.
* - Result written back to location on VME bus.
*
* Return: Bytes written on success, -EINVAL if resource is not a VME master
* resource or RMW operation is not supported. Hardware specific
* errors may also be returned.
*/
unsigned int vme_master_rmw(struct vme_resource *resource, unsigned int mask,
unsigned int compare, unsigned int swap, loff_t offset)
......@@ -644,6 +792,17 @@ unsigned int vme_master_rmw(struct vme_resource *resource, unsigned int mask,
}
EXPORT_SYMBOL(vme_master_rmw);
/**
* vme_master_mmap - Mmap region of VME master window.
* @resource: Pointer to VME master resource.
* @vma: Pointer to definition of user mapping.
*
* Memory map a region of the VME master window into user space.
*
* Return: Zero on success, -EINVAL if resource is not a VME master
* resource or -EFAULT if map exceeds window size. Other generic mmap
* errors may also be returned.
*/
int vme_master_mmap(struct vme_resource *resource, struct vm_area_struct *vma)
{
struct vme_master_resource *image;
......@@ -670,6 +829,12 @@ int vme_master_mmap(struct vme_resource *resource, struct vm_area_struct *vma)
}
EXPORT_SYMBOL(vme_master_mmap);
/**
* vme_master_free - Free VME master window
* @resource: Pointer to VME master resource.
*
* Free the provided master resource so that it may be reallocated.
*/
void vme_master_free(struct vme_resource *resource)
{
struct vme_master_resource *master_image;
......@@ -699,9 +864,15 @@ void vme_master_free(struct vme_resource *resource)
}
EXPORT_SYMBOL(vme_master_free);
/*
* Request a DMA controller with specific attributes, return some unique
* identifier.
/**
* vme_dma_request - Request a DMA controller.
* @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
* @route: Required src/destination combination.
*
* Request a VME DMA controller with capability to perform transfers bewteen
* requested source/destination combination.
*
* Return: Pointer to VME DMA resource on success, NULL on failure.
*/
struct vme_resource *vme_dma_request(struct vme_dev *vdev, u32 route)
{
......@@ -768,8 +939,15 @@ struct vme_resource *vme_dma_request(struct vme_dev *vdev, u32 route)
}
EXPORT_SYMBOL(vme_dma_request);
/*
* Start new list
/**
* vme_new_dma_list - Create new VME DMA list.
* @resource: Pointer to VME DMA resource.
*
* Create a new VME DMA list. It is the responsibility of the user to free
* the list once it is no longer required with vme_dma_list_free().
*
* Return: Pointer to new VME DMA list, NULL on allocation failure or invalid
* VME DMA resource.
*/
struct vme_dma_list *vme_new_dma_list(struct vme_resource *resource)
{
......@@ -796,8 +974,16 @@ struct vme_dma_list *vme_new_dma_list(struct vme_resource *resource)
}
EXPORT_SYMBOL(vme_new_dma_list);
/*
* Create "Pattern" type attributes
/**
* vme_dma_pattern_attribute - Create "Pattern" type VME DMA list attribute.
* @pattern: Value to use used as pattern
* @type: Type of pattern to be written.
*
* Create VME DMA list attribute for pattern generation. It is the
* responsibility of the user to free used attributes using
* vme_dma_free_attribute().
*
* Return: Pointer to VME DMA attribute, NULL on failure.
*/
struct vme_dma_attr *vme_dma_pattern_attribute(u32 pattern, u32 type)
{
......@@ -831,8 +1017,15 @@ struct vme_dma_attr *vme_dma_pattern_attribute(u32 pattern, u32 type)
}
EXPORT_SYMBOL(vme_dma_pattern_attribute);
/*
* Create "PCI" type attributes
/**
* vme_dma_pci_attribute - Create "PCI" type VME DMA list attribute.
* @address: PCI base address for DMA transfer.
*
* Create VME DMA list attribute pointing to a location on PCI for DMA
* transfers. It is the responsibility of the user to free used attributes
* using vme_dma_free_attribute().
*
* Return: Pointer to VME DMA attribute, NULL on failure.
*/
struct vme_dma_attr *vme_dma_pci_attribute(dma_addr_t address)
{
......@@ -869,8 +1062,18 @@ struct vme_dma_attr *vme_dma_pci_attribute(dma_addr_t address)
}
EXPORT_SYMBOL(vme_dma_pci_attribute);
/*
* Create "VME" type attributes
/**
* vme_dma_vme_attribute - Create "VME" type VME DMA list attribute.
* @address: VME base address for DMA transfer.
* @aspace: VME address space to use for DMA transfer.
* @cycle: VME bus cycle to use for DMA transfer.
* @dwidth: VME data width to use for DMA transfer.
*
* Create VME DMA list attribute pointing to a location on the VME bus for DMA
* transfers. It is the responsibility of the user to free used attributes
* using vme_dma_free_attribute().
*
* Return: Pointer to VME DMA attribute, NULL on failure.
*/
struct vme_dma_attr *vme_dma_vme_attribute(unsigned long long address,
u32 aspace, u32 cycle, u32 dwidth)
......@@ -908,8 +1111,12 @@ struct vme_dma_attr *vme_dma_vme_attribute(unsigned long long address,
}
EXPORT_SYMBOL(vme_dma_vme_attribute);
/*
* Free attribute
/**
* vme_dma_free_attribute - Free DMA list attribute.
* @attributes: Pointer to DMA list attribute.
*
* Free VME DMA list attribute. VME DMA list attributes can be safely freed
* once vme_dma_list_add() has returned.
*/
void vme_dma_free_attribute(struct vme_dma_attr *attributes)
{
......@@ -918,6 +1125,23 @@ void vme_dma_free_attribute(struct vme_dma_attr *attributes)
}
EXPORT_SYMBOL(vme_dma_free_attribute);
/**
* vme_dma_list_add - Add enty to a VME DMA list.
* @list: Pointer to VME list.
* @src: Pointer to DMA list attribute to use as source.
* @dest: Pointer to DMA list attribute to use as destination.
* @count: Number of bytes to transfer.
*
* Add an entry to the provided VME DMA list. Entry requires pointers to source
* and destination DMA attributes and a count.
*
* Please note, the attributes supported as source and destinations for
* transfers are hardware dependent.
*
* Return: Zero on success, -EINVAL if operation is not supported on this
* device or if the link list has already been submitted for execution.
* Hardware specific errors also possible.
*/
int vme_dma_list_add(struct vme_dma_list *list, struct vme_dma_attr *src,
struct vme_dma_attr *dest, size_t count)
{
......@@ -942,6 +1166,16 @@ int vme_dma_list_add(struct vme_dma_list *list, struct vme_dma_attr *src,
}
EXPORT_SYMBOL(vme_dma_list_add);
/**
* vme_dma_list_exec - Queue a VME DMA list for execution.
* @list: Pointer to VME list.
*
* Queue the provided VME DMA list for execution. The call will return once the
* list has been executed.
*
* Return: Zero on success, -EINVAL if operation is not supported on this
* device. Hardware specific errors also possible.
*/
int vme_dma_list_exec(struct vme_dma_list *list)
{
struct vme_bridge *bridge = list->parent->parent;
......@@ -962,6 +1196,15 @@ int vme_dma_list_exec(struct vme_dma_list *list)
}
EXPORT_SYMBOL(vme_dma_list_exec);
/**
* vme_dma_list_free - Free a VME DMA list.
* @list: Pointer to VME list.
*
* Free the provided DMA list and all its entries.
*
* Return: Zero on success, -EINVAL on invalid VME resource, -EBUSY if resource
* is still in use. Hardware specific errors also possible.
*/
int vme_dma_list_free(struct vme_dma_list *list)
{
struct vme_bridge *bridge = list->parent->parent;
......@@ -994,6 +1237,15 @@ int vme_dma_list_free(struct vme_dma_list *list)
}
EXPORT_SYMBOL(vme_dma_list_free);
/**
* vme_dma_free - Free a VME DMA resource.
* @resource: Pointer to VME DMA resource.
*
* Free the provided DMA resource so that it may be reallocated.
*
* Return: Zero on success, -EINVAL on invalid VME resource, -EBUSY if resource
* is still active.
*/
int vme_dma_free(struct vme_resource *resource)
{
struct vme_dma_resource *ctrlr;
......@@ -1099,6 +1351,22 @@ void vme_irq_handler(struct vme_bridge *bridge, int level, int statid)
}
EXPORT_SYMBOL(vme_irq_handler);
/**
* vme_irq_request - Request a specific VME interrupt.
* @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
* @level: Interrupt priority being requested.
* @statid: Interrupt vector being requested.
* @callback: Pointer to callback function called when VME interrupt/vector
* received.
* @priv_data: Generic pointer that will be passed to the callback function.
*
* Request callback to be attached as a handler for VME interrupts with provided
* level and statid.
*
* Return: Zero on success, -EINVAL on invalid vme device, level or if the
* function is not supported, -EBUSY if the level/statid combination is
* already in use. Hardware specific errors also possible.
*/
int vme_irq_request(struct vme_dev *vdev, int level, int statid,
void (*callback)(int, int, void *),
void *priv_data)
......@@ -1142,6 +1410,14 @@ int vme_irq_request(struct vme_dev *vdev, int level, int statid,
}
EXPORT_SYMBOL(vme_irq_request);
/**
* vme_irq_free - Free a VME interrupt.
* @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
* @level: Interrupt priority of interrupt being freed.
* @statid: Interrupt vector of interrupt being freed.
*
* Remove previously attached callback from VME interrupt priority/vector.
*/
void vme_irq_free(struct vme_dev *vdev, int level, int statid)
{
struct vme_bridge *bridge;
......@@ -1177,6 +1453,18 @@ void vme_irq_free(struct vme_dev *vdev, int level, int statid)
}
EXPORT_SYMBOL(vme_irq_free);
/**
* vme_irq_generate - Generate VME interrupt.
* @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
* @level: Interrupt priority at which to assert the interrupt.
* @statid: Interrupt vector to associate with the interrupt.
*
* Generate a VME interrupt of the provided level and with the provided
* statid.
*
* Return: Zero on success, -EINVAL on invalid vme device, level or if the
* function is not supported. Hardware specific errors also possible.
*/
int vme_irq_generate(struct vme_dev *vdev, int level, int statid)
{
struct vme_bridge *bridge;
......@@ -1201,8 +1489,15 @@ int vme_irq_generate(struct vme_dev *vdev, int level, int statid)
}
EXPORT_SYMBOL(vme_irq_generate);
/*
* Request the location monitor, return resource or NULL
/**
* vme_lm_request - Request a VME location monitor
* @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
*
* Allocate a location monitor resource to the driver. A location monitor
* allows the driver to monitor accesses to a contiguous number of
* addresses on the VME bus.
*
* Return: Pointer to a VME resource on success or NULL on failure.
*/
struct vme_resource *vme_lm_request(struct vme_dev *vdev)
{
......@@ -1218,7 +1513,7 @@ struct vme_resource *vme_lm_request(struct vme_dev *vdev)
goto err_bus;
}
/* Loop through DMA resources */
/* Loop through LM resources */
list_for_each(lm_pos, &bridge->lm_resources) {
lm = list_entry(lm_pos,
struct vme_lm_resource, list);
......@@ -1264,6 +1559,17 @@ struct vme_resource *vme_lm_request(struct vme_dev *vdev)
}
EXPORT_SYMBOL(vme_lm_request);
/**
* vme_lm_count - Determine number of VME Addresses monitored
* @resource: Pointer to VME location monitor resource.
*
* The number of contiguous addresses monitored is hardware dependent.
* Return the number of contiguous addresses monitored by the
* location monitor.
*
* Return: Count of addresses monitored or -EINVAL when provided with an
* invalid location monitor resource.
*/
int vme_lm_count(struct vme_resource *resource)
{
struct vme_lm_resource *lm;
......@@ -1279,6 +1585,20 @@ int vme_lm_count(struct vme_resource *resource)
}
EXPORT_SYMBOL(vme_lm_count);
/**
* vme_lm_set - Configure location monitor
* @resource: Pointer to VME location monitor resource.
* @lm_base: Base address to monitor.
* @aspace: VME address space to monitor.
* @cycle: VME bus cycle type to monitor.
*
* Set the base address, address space and cycle type of accesses to be
* monitored by the location monitor.
*
* Return: Zero on success, -EINVAL when provided with an invalid location
* monitor resource or function is not supported. Hardware specific
* errors may also be returned.
*/
int vme_lm_set(struct vme_resource *resource, unsigned long long lm_base,
u32 aspace, u32 cycle)
{
......@@ -1301,6 +1621,20 @@ int vme_lm_set(struct vme_resource *resource, unsigned long long lm_base,
}
EXPORT_SYMBOL(vme_lm_set);
/**
* vme_lm_get - Retrieve location monitor settings
* @resource: Pointer to VME location monitor resource.
* @lm_base: Pointer used to output the base address monitored.
* @aspace: Pointer used to output the address space monitored.
* @cycle: Pointer used to output the VME bus cycle type monitored.
*
* Retrieve the base address, address space and cycle type of accesses to
* be monitored by the location monitor.
*
* Return: Zero on success, -EINVAL when provided with an invalid location
* monitor resource or function is not supported. Hardware specific
* errors may also be returned.
*/
int vme_lm_get(struct vme_resource *resource, unsigned long long *lm_base,
u32 *aspace, u32 *cycle)
{
......@@ -1323,6 +1657,21 @@ int vme_lm_get(struct vme_resource *resource, unsigned long long *lm_base,
}
EXPORT_SYMBOL(vme_lm_get);
/**
* vme_lm_attach - Provide callback for location monitor address
* @resource: Pointer to VME location monitor resource.
* @monitor: Offset to which callback should be attached.
* @callback: Pointer to callback function called when triggered.
* @data: Generic pointer that will be passed to the callback function.
*
* Attach a callback to the specificed offset into the location monitors
* monitored addresses. A generic pointer is provided to allow data to be
* passed to the callback when called.
*
* Return: Zero on success, -EINVAL when provided with an invalid location
* monitor resource or function is not supported. Hardware specific
* errors may also be returned.
*/
int vme_lm_attach(struct vme_resource *resource, int monitor,
void (*callback)(void *), void *data)
{
......@@ -1345,6 +1694,18 @@ int vme_lm_attach(struct vme_resource *resource, int monitor,
}
EXPORT_SYMBOL(vme_lm_attach);
/**
* vme_lm_detach - Remove callback for location monitor address
* @resource: Pointer to VME location monitor resource.
* @monitor: Offset to which callback should be removed.
*
* Remove the callback associated with the specificed offset into the
* location monitors monitored addresses.
*
* Return: Zero on success, -EINVAL when provided with an invalid location
* monitor resource or function is not supported. Hardware specific
* errors may also be returned.
*/
int vme_lm_detach(struct vme_resource *resource, int monitor)
{
struct vme_bridge *bridge = find_bridge(resource);
......@@ -1366,6 +1727,18 @@ int vme_lm_detach(struct vme_resource *resource, int monitor)
}
EXPORT_SYMBOL(vme_lm_detach);
/**
* vme_lm_free - Free allocated VME location monitor
* @resource: Pointer to VME location monitor resource.
*
* Free allocation of a VME location monitor.
*
* WARNING: This function currently expects that any callbacks that have
* been attached to the location monitor have been removed.
*
* Return: Zero on success, -EINVAL when provided with an invalid location
* monitor resource.
*/
void vme_lm_free(struct vme_resource *resource)
{
struct vme_lm_resource *lm;
......@@ -1392,6 +1765,16 @@ void vme_lm_free(struct vme_resource *resource)
}
EXPORT_SYMBOL(vme_lm_free);
/**
* vme_slot_num - Retrieve slot ID
* @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
*
* Retrieve the slot ID associated with the provided VME device.
*
* Return: The slot ID on success, -EINVAL if VME bridge cannot be determined
* or the function is not supported. Hardware specific errors may also
* be returned.
*/
int vme_slot_num(struct vme_dev *vdev)
{
struct vme_bridge *bridge;
......@@ -1411,6 +1794,15 @@ int vme_slot_num(struct vme_dev *vdev)
}
EXPORT_SYMBOL(vme_slot_num);
/**
* vme_bus_num - Retrieve bus number
* @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
*
* Retrieve the bus enumeration associated with the provided VME device.
*
* Return: The bus number on success, -EINVAL if VME bridge cannot be
* determined.
*/
int vme_bus_num(struct vme_dev *vdev)
{
struct vme_bridge *bridge;
......@@ -1556,6 +1948,15 @@ static int __vme_register_driver(struct vme_driver *drv, unsigned int ndevs)
return err;
}
/**
* vme_register_driver - Register a VME driver
* @drv: Pointer to VME driver structure to register.
* @ndevs: Maximum number of devices to allow to be enumerated.
*
* Register a VME device driver with the VME subsystem.
*
* Return: Zero on success, error value on registration failure.
*/
int vme_register_driver(struct vme_driver *drv, unsigned int ndevs)
{
int err;
......@@ -1576,6 +1977,12 @@ int vme_register_driver(struct vme_driver *drv, unsigned int ndevs)
}
EXPORT_SYMBOL(vme_register_driver);
/**
* vme_unregister_driver - Unregister a VME driver
* @drv: Pointer to VME driver structure to unregister.
*
* Unregister a VME device driver from the VME subsystem.
*/
void vme_unregister_driver(struct vme_driver *drv)
{
struct vme_dev *dev, *dev_tmp;
......
include/linux/vme.h
View file @ b5bc980a
......@@ -92,7 +92,7 @@ extern struct bus_type vme_bus_type;
#define VME_SLOT_ALL -2
/**
* Structure representing a VME device
* struct vme_dev - Structure representing a VME device
* @num: The device number
* @bridge: Pointer to the bridge device this device is on
* @dev: Internal device structure
......@@ -107,6 +107,16 @@ struct vme_dev {
struct list_head bridge_list;
};
/**
* struct vme_driver - Structure representing a VME driver
* @name: Driver name, should be unique among VME drivers and usually the same
* as the module name.
* @match: Callback used to determine whether probe should be run.
* @probe: Callback for device binding, called when new device is detected.
* @remove: Callback, called on device removal.
* @driver: Underlying generic device driver structure.
* @devices: List of VME devices (struct vme_dev) associated with this driver.
*/
struct vme_driver {
const char *name;
int (*match)(struct vme_dev *);
......
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