1c65a2e2f6
The "type of reset" parameter to the gasket device reset APIs isn't required by the only gasket device submitted upstream, apex. The framework documents the param as private to the device driver and a pass-through at the gasket layer, but the gasket core calls the device driver with a hardcoded reset type of zero, which is not documented as having a predefined meaning. In light of all this, remove the reset type parameter from the framework. Remove the reset ioctl reset type parameter, and bump the framework version number to reflect the interface change. Signed-off-by: Todd Poynor <toddpoynor@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
123 lines
4 KiB
C
123 lines
4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Common Gasket device kernel and user space declarations.
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*
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* Copyright (C) 2018 Google, Inc.
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*/
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#ifndef __GASKET_H__
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#define __GASKET_H__
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#include <linux/ioctl.h>
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#include <linux/types.h>
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/* ioctl structure declarations */
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/* Ioctl structures are padded to a multiple of 64 bits */
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/* and padded to put 64 bit values on 64 bit boundaries. */
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/* Unsigned 64 bit integers are used to hold pointers. */
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/* This helps compatibility between 32 and 64 bits. */
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/*
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* Common structure for ioctls associating an eventfd with a device interrupt,
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* when using the Gasket interrupt module.
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*/
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struct gasket_interrupt_eventfd {
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u64 interrupt;
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u64 event_fd;
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};
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/*
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* Common structure for ioctls mapping and unmapping buffers when using the
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* Gasket page_table module.
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*/
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struct gasket_page_table_ioctl {
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u64 page_table_index;
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u64 size;
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u64 host_address;
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u64 device_address;
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};
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/*
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* Common structure for ioctls mapping and unmapping buffers when using the
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* Gasket page_table module.
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* dma_address: phys addr start of coherent memory, allocated by kernel
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*/
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struct gasket_coherent_alloc_config_ioctl {
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u64 page_table_index;
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u64 enable;
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u64 size;
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u64 dma_address;
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};
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/* Base number for all Gasket-common IOCTLs */
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#define GASKET_IOCTL_BASE 0xDC
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/* Reset the device. */
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#define GASKET_IOCTL_RESET _IO(GASKET_IOCTL_BASE, 0)
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/* Associate the specified [event]fd with the specified interrupt. */
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#define GASKET_IOCTL_SET_EVENTFD \
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_IOW(GASKET_IOCTL_BASE, 1, struct gasket_interrupt_eventfd)
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/*
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* Clears any eventfd associated with the specified interrupt. The (ulong)
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* argument is the interrupt number to clear.
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*/
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#define GASKET_IOCTL_CLEAR_EVENTFD _IOW(GASKET_IOCTL_BASE, 2, unsigned long)
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/*
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* [Loopbacks only] Requests that the loopback device send the specified
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* interrupt to the host. The (ulong) argument is the number of the interrupt to
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* send.
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*/
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#define GASKET_IOCTL_LOOPBACK_INTERRUPT \
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_IOW(GASKET_IOCTL_BASE, 3, unsigned long)
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/* Queries the kernel for the number of page tables supported by the device. */
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#define GASKET_IOCTL_NUMBER_PAGE_TABLES _IOR(GASKET_IOCTL_BASE, 4, u64)
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/*
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* Queries the kernel for the maximum size of the page table. Only the size and
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* page_table_index fields are used from the struct gasket_page_table_ioctl.
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*/
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#define GASKET_IOCTL_PAGE_TABLE_SIZE \
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_IOWR(GASKET_IOCTL_BASE, 5, struct gasket_page_table_ioctl)
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/*
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* Queries the kernel for the current simple page table size. Only the size and
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* page_table_index fields are used from the struct gasket_page_table_ioctl.
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*/
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#define GASKET_IOCTL_SIMPLE_PAGE_TABLE_SIZE \
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_IOWR(GASKET_IOCTL_BASE, 6, struct gasket_page_table_ioctl)
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/*
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* Tells the kernel to change the split between the number of simple and
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* extended entries in the given page table. Only the size and page_table_index
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* fields are used from the struct gasket_page_table_ioctl.
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*/
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#define GASKET_IOCTL_PARTITION_PAGE_TABLE \
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_IOW(GASKET_IOCTL_BASE, 7, struct gasket_page_table_ioctl)
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/*
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* Tells the kernel to map size bytes at host_address to device_address in
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* page_table_index page table.
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*/
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#define GASKET_IOCTL_MAP_BUFFER \
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_IOW(GASKET_IOCTL_BASE, 8, struct gasket_page_table_ioctl)
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/*
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* Tells the kernel to unmap size bytes at host_address from device_address in
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* page_table_index page table.
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*/
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#define GASKET_IOCTL_UNMAP_BUFFER \
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_IOW(GASKET_IOCTL_BASE, 9, struct gasket_page_table_ioctl)
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/* Clear the interrupt counts stored for this device. */
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#define GASKET_IOCTL_CLEAR_INTERRUPT_COUNTS _IO(GASKET_IOCTL_BASE, 10)
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/* Enable/Disable and configure the coherent allocator. */
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#define GASKET_IOCTL_CONFIG_COHERENT_ALLOCATOR \
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_IOWR(GASKET_IOCTL_BASE, 11, struct gasket_coherent_alloc_config_ioctl)
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#endif /* __GASKET_H__ */
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