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: Martyn Welch <martyn.welch@collabora.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Martyn Welch
Greg Kroah-Hartman
Родитель
5cd5e6ad0e
Коммит
b5bc980a49
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@ -76,9 +76,16 @@ static struct vme_bridge *find_bridge(struct vme_resource *resource)
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}
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}
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/*
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/**
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* vme_free_consistent - Allocate contiguous memory.
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* @resource: Pointer to VME resource.
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* @size: Size of allocation required.
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* @dma: Pointer to variable to store physical address of allocation.
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*
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* Allocate a contiguous block of memory for use by the driver. This is used to
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* create the buffers for the slave windows.
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*
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* Return: Virtual address of allocation on success, NULL on failure.
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*/
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void *vme_alloc_consistent(struct vme_resource *resource, size_t size,
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dma_addr_t *dma)
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@ -111,8 +118,14 @@ void *vme_alloc_consistent(struct vme_resource *resource, size_t size,
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}
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EXPORT_SYMBOL(vme_alloc_consistent);
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/*
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* Free previously allocated contiguous block of memory.
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/**
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* vme_free_consistent - Free previously allocated memory.
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* @resource: Pointer to VME resource.
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* @size: Size of allocation to free.
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* @vaddr: Virtual address of allocation.
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* @dma: Physical address of allocation.
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*
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* Free previously allocated block of contiguous memory.
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*/
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void vme_free_consistent(struct vme_resource *resource, size_t size,
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void *vaddr, dma_addr_t dma)
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@ -145,6 +158,16 @@ void vme_free_consistent(struct vme_resource *resource, size_t size,
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}
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EXPORT_SYMBOL(vme_free_consistent);
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/**
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* vme_get_size - Helper function returning size of a VME window
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* @resource: Pointer to VME slave or master resource.
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*
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* Determine the size of the VME window provided. This is a helper
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* function, wrappering the call to vme_master_get or vme_slave_get
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* depending on the type of window resource handed to it.
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*
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* Return: Size of the window on success, zero on failure.
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*/
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size_t vme_get_size(struct vme_resource *resource)
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{
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int enabled, retval;
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@ -259,9 +282,16 @@ static u32 vme_get_aspace(int am)
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return 0;
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}
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/*
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* Request a slave image with specific attributes, return some unique
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* identifier.
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/**
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* vme_slave_request - Request a VME slave window resource.
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* @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
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* @address: Required VME address space.
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* @cycle: Required VME data transfer cycle type.
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*
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* Request use of a VME window resource capable of being set for the requested
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* address space and data transfer cycle.
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*
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* Return: Pointer to VME resource on success, NULL on failure.
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*/
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struct vme_resource *vme_slave_request(struct vme_dev *vdev, u32 address,
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u32 cycle)
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@ -327,6 +357,23 @@ err_bus:
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}
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EXPORT_SYMBOL(vme_slave_request);
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/**
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* vme_slave_set - Set VME slave window configuration.
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* @resource: Pointer to VME slave resource.
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* @enabled: State to which the window should be configured.
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* @vme_base: Base address for the window.
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* @size: Size of the VME window.
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* @buf_base: Based address of buffer used to provide VME slave window storage.
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* @aspace: VME address space for the VME window.
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* @cycle: VME data transfer cycle type for the VME window.
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*
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* Set configuration for provided VME slave window.
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*
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* Return: Zero on success, -EINVAL if operation is not supported on this
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* device, if an invalid resource has been provided or invalid
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* attributes are provided. Hardware specific errors may also be
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* returned.
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*/
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int vme_slave_set(struct vme_resource *resource, int enabled,
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unsigned long long vme_base, unsigned long long size,
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dma_addr_t buf_base, u32 aspace, u32 cycle)
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@ -362,6 +409,21 @@ int vme_slave_set(struct vme_resource *resource, int enabled,
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}
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EXPORT_SYMBOL(vme_slave_set);
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/**
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* vme_slave_get - Retrieve VME slave window configuration.
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* @resource: Pointer to VME slave resource.
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* @enabled: Pointer to variable for storing state.
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* @vme_base: Pointer to variable for storing window base address.
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* @size: Pointer to variable for storing window size.
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* @buf_base: Pointer to variable for storing slave buffer base address.
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* @aspace: Pointer to variable for storing VME address space.
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* @cycle: Pointer to variable for storing VME data transfer cycle type.
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*
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* Return configuration for provided VME slave window.
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*
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* Return: Zero on success, -EINVAL if operation is not supported on this
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* device or if an invalid resource has been provided.
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*/
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int vme_slave_get(struct vme_resource *resource, int *enabled,
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unsigned long long *vme_base, unsigned long long *size,
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dma_addr_t *buf_base, u32 *aspace, u32 *cycle)
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@ -386,6 +448,12 @@ int vme_slave_get(struct vme_resource *resource, int *enabled,
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}
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EXPORT_SYMBOL(vme_slave_get);
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/**
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* vme_slave_free - Free VME slave window
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* @resource: Pointer to VME slave resource.
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*
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* Free the provided slave resource so that it may be reallocated.
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*/
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void vme_slave_free(struct vme_resource *resource)
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{
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struct vme_slave_resource *slave_image;
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@ -415,9 +483,17 @@ void vme_slave_free(struct vme_resource *resource)
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}
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EXPORT_SYMBOL(vme_slave_free);
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/*
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* Request a master image with specific attributes, return some unique
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* identifier.
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/**
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* vme_master_request - Request a VME master window resource.
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* @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
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* @address: Required VME address space.
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* @cycle: Required VME data transfer cycle type.
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* @dwidth: Required VME data transfer width.
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*
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* Request use of a VME window resource capable of being set for the requested
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* address space, data transfer cycle and width.
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*
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* Return: Pointer to VME resource on success, NULL on failure.
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*/
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struct vme_resource *vme_master_request(struct vme_dev *vdev, u32 address,
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u32 cycle, u32 dwidth)
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@ -486,6 +562,23 @@ err_bus:
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}
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EXPORT_SYMBOL(vme_master_request);
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/**
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* vme_master_set - Set VME master window configuration.
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* @resource: Pointer to VME master resource.
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* @enabled: State to which the window should be configured.
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* @vme_base: Base address for the window.
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* @size: Size of the VME window.
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* @aspace: VME address space for the VME window.
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* @cycle: VME data transfer cycle type for the VME window.
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* @dwidth: VME data transfer width for the VME window.
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*
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* Set configuration for provided VME master window.
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*
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* Return: Zero on success, -EINVAL if operation is not supported on this
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* device, if an invalid resource has been provided or invalid
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* attributes are provided. Hardware specific errors may also be
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* returned.
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*/
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int vme_master_set(struct vme_resource *resource, int enabled,
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unsigned long long vme_base, unsigned long long size, u32 aspace,
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u32 cycle, u32 dwidth)
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@ -522,6 +615,21 @@ int vme_master_set(struct vme_resource *resource, int enabled,
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}
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EXPORT_SYMBOL(vme_master_set);
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/**
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* vme_master_get - Retrieve VME master window configuration.
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* @resource: Pointer to VME master resource.
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* @enabled: Pointer to variable for storing state.
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* @vme_base: Pointer to variable for storing window base address.
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* @size: Pointer to variable for storing window size.
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* @aspace: Pointer to variable for storing VME address space.
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* @cycle: Pointer to variable for storing VME data transfer cycle type.
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* @dwidth: Pointer to variable for storing VME data transfer width.
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*
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* Return configuration for provided VME master window.
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*
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* Return: Zero on success, -EINVAL if operation is not supported on this
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* device or if an invalid resource has been provided.
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*/
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int vme_master_get(struct vme_resource *resource, int *enabled,
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unsigned long long *vme_base, unsigned long long *size, u32 *aspace,
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u32 *cycle, u32 *dwidth)
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@ -546,8 +654,20 @@ int vme_master_get(struct vme_resource *resource, int *enabled,
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}
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EXPORT_SYMBOL(vme_master_get);
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/*
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* Read data out of VME space into a buffer.
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/**
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* vme_master_write - Read data from VME space into a buffer.
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* @resource: Pointer to VME master resource.
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* @buf: Pointer to buffer where data should be transferred.
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* @count: Number of bytes to transfer.
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* @offset: Offset into VME master window at which to start transfer.
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*
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* Perform read of count bytes of data from location on VME bus which maps into
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* the VME master window at offset to buf.
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*
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* Return: Number of bytes read, -EINVAL if resource is not a VME master
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* resource or read operation is not supported. -EFAULT returned if
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* invalid offset is provided. Hardware specific errors may also be
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* returned.
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*/
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ssize_t vme_master_read(struct vme_resource *resource, void *buf, size_t count,
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loff_t offset)
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@ -583,8 +703,20 @@ ssize_t vme_master_read(struct vme_resource *resource, void *buf, size_t count,
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}
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EXPORT_SYMBOL(vme_master_read);
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/*
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* Write data out to VME space from a buffer.
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/**
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* vme_master_write - Write data out to VME space from a buffer.
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* @resource: Pointer to VME master resource.
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* @buf: Pointer to buffer holding data to transfer.
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* @count: Number of bytes to transfer.
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* @offset: Offset into VME master window at which to start transfer.
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*
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* Perform write of count bytes of data from buf to location on VME bus which
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* maps into the VME master window at offset.
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*
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* Return: Number of bytes written, -EINVAL if resource is not a VME master
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* resource or write operation is not supported. -EFAULT returned if
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* invalid offset is provided. Hardware specific errors may also be
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* returned.
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*/
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ssize_t vme_master_write(struct vme_resource *resource, void *buf,
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size_t count, loff_t offset)
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@ -619,8 +751,24 @@ ssize_t vme_master_write(struct vme_resource *resource, void *buf,
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}
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EXPORT_SYMBOL(vme_master_write);
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/*
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* Perform RMW cycle to provided location.
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/**
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* vme_master_rmw - Perform read-modify-write cycle.
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* @resource: Pointer to VME master resource.
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* @mask: Bits to be compared and swapped in operation.
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* @compare: Bits to be compared with data read from offset.
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* @swap: Bits to be swapped in data read from offset.
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* @offset: Offset into VME master window at which to perform operation.
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*
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* Perform read-modify-write cycle on provided location:
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* - Location on VME bus is read.
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* - Bits selected by mask are compared with compare.
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* - Where a selected bit matches that in compare and are selected in swap,
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* the bit is swapped.
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* - Result written back to location on VME bus.
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*
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* Return: Bytes written on success, -EINVAL if resource is not a VME master
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* resource or RMW operation is not supported. Hardware specific
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* errors may also be returned.
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*/
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unsigned int vme_master_rmw(struct vme_resource *resource, unsigned int mask,
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unsigned int compare, unsigned int swap, loff_t offset)
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@ -644,6 +792,17 @@ unsigned int vme_master_rmw(struct vme_resource *resource, unsigned int mask,
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}
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EXPORT_SYMBOL(vme_master_rmw);
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/**
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* vme_master_mmap - Mmap region of VME master window.
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* @resource: Pointer to VME master resource.
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* @vma: Pointer to definition of user mapping.
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*
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* Memory map a region of the VME master window into user space.
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*
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* Return: Zero on success, -EINVAL if resource is not a VME master
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* resource or -EFAULT if map exceeds window size. Other generic mmap
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* errors may also be returned.
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*/
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int vme_master_mmap(struct vme_resource *resource, struct vm_area_struct *vma)
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{
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struct vme_master_resource *image;
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@ -670,6 +829,12 @@ int vme_master_mmap(struct vme_resource *resource, struct vm_area_struct *vma)
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}
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EXPORT_SYMBOL(vme_master_mmap);
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/**
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* vme_master_free - Free VME master window
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* @resource: Pointer to VME master resource.
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*
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* Free the provided master resource so that it may be reallocated.
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*/
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void vme_master_free(struct vme_resource *resource)
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{
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struct vme_master_resource *master_image;
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@ -699,9 +864,15 @@ void vme_master_free(struct vme_resource *resource)
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}
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EXPORT_SYMBOL(vme_master_free);
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/*
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* Request a DMA controller with specific attributes, return some unique
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* identifier.
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/**
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* vme_dma_request - Request a DMA controller.
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* @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
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* @route: Required src/destination combination.
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*
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* Request a VME DMA controller with capability to perform transfers bewteen
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* requested source/destination combination.
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*
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* Return: Pointer to VME DMA resource on success, NULL on failure.
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*/
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struct vme_resource *vme_dma_request(struct vme_dev *vdev, u32 route)
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{
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@ -768,8 +939,15 @@ err_bus:
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}
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EXPORT_SYMBOL(vme_dma_request);
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/*
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* Start new list
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/**
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* vme_new_dma_list - Create new VME DMA list.
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* @resource: Pointer to VME DMA resource.
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*
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* Create a new VME DMA list. It is the responsibility of the user to free
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* the list once it is no longer required with vme_dma_list_free().
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*
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* Return: Pointer to new VME DMA list, NULL on allocation failure or invalid
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* VME DMA resource.
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*/
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struct vme_dma_list *vme_new_dma_list(struct vme_resource *resource)
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{
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@ -796,8 +974,16 @@ struct vme_dma_list *vme_new_dma_list(struct vme_resource *resource)
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}
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EXPORT_SYMBOL(vme_new_dma_list);
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/*
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* Create "Pattern" type attributes
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/**
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* vme_dma_pattern_attribute - Create "Pattern" type VME DMA list attribute.
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* @pattern: Value to use used as pattern
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* @type: Type of pattern to be written.
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*
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* Create VME DMA list attribute for pattern generation. It is the
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* responsibility of the user to free used attributes using
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* vme_dma_free_attribute().
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*
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* Return: Pointer to VME DMA attribute, NULL on failure.
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*/
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struct vme_dma_attr *vme_dma_pattern_attribute(u32 pattern, u32 type)
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{
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@ -831,8 +1017,15 @@ err_attr:
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}
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EXPORT_SYMBOL(vme_dma_pattern_attribute);
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/*
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* Create "PCI" type attributes
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/**
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* vme_dma_pci_attribute - Create "PCI" type VME DMA list attribute.
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* @address: PCI base address for DMA transfer.
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*
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* Create VME DMA list attribute pointing to a location on PCI for DMA
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* transfers. It is the responsibility of the user to free used attributes
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* using vme_dma_free_attribute().
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*
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* Return: Pointer to VME DMA attribute, NULL on failure.
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*/
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struct vme_dma_attr *vme_dma_pci_attribute(dma_addr_t address)
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{
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@ -869,8 +1062,18 @@ err_attr:
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}
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EXPORT_SYMBOL(vme_dma_pci_attribute);
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/*
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* Create "VME" type attributes
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/**
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* vme_dma_vme_attribute - Create "VME" type VME DMA list attribute.
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* @address: VME base address for DMA transfer.
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* @aspace: VME address space to use for DMA transfer.
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* @cycle: VME bus cycle to use for DMA transfer.
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* @dwidth: VME data width to use for DMA transfer.
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*
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* Create VME DMA list attribute pointing to a location on the VME bus for DMA
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* transfers. It is the responsibility of the user to free used attributes
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* using vme_dma_free_attribute().
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*
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* Return: Pointer to VME DMA attribute, NULL on failure.
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||||
*/
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struct vme_dma_attr *vme_dma_vme_attribute(unsigned long long address,
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u32 aspace, u32 cycle, u32 dwidth)
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@ -908,8 +1111,12 @@ err_attr:
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}
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EXPORT_SYMBOL(vme_dma_vme_attribute);
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/*
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* Free attribute
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/**
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* vme_dma_free_attribute - Free DMA list attribute.
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* @attributes: Pointer to DMA list attribute.
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*
|
||||
* Free VME DMA list attribute. VME DMA list attributes can be safely freed
|
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* once vme_dma_list_add() has returned.
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||||
*/
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void vme_dma_free_attribute(struct vme_dma_attr *attributes)
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{
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||||
|
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@ -918,6 +1125,23 @@ void vme_dma_free_attribute(struct vme_dma_attr *attributes)
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|||
}
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||||
EXPORT_SYMBOL(vme_dma_free_attribute);
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/**
|
||||
* 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.
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||||
* @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 @@ err_bus:
|
|||
}
|
||||
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;
|
||||
|
|
|
|||
|
|
@ -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 *);
|
||||
|
|
|
|||
Загрузка…
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