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/*
* Copyright 2009 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software")
* to deal in the software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* them Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTIBILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES, OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT, OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Author:
* Adam Jackson <ajax@redhat.com>
*/
#include <stdlib.h>
#include <string.h>
#include "pciaccess.h"
#include "pciaccess_private.h"
static struct pci_io_handle *
new_io_handle(void)
{
struct pci_io_handle *new;
new = malloc(sizeof(struct pci_io_handle));
if (!new)
return NULL;
return new;
}
static void
delete_io_handle(struct pci_io_handle *handle)
{
free(handle);
return;
}
_pci_hidden void
pci_io_cleanup(void)
{
}
/**
* Open a handle to a PCI device I/O range. The \c base and \c size
* requested must fit entirely within a single I/O BAR on the device.
* \c size is in bytes.
*
* \returns
* An opaque handle to the I/O BAR, or \c NULL on error.
*/
struct pci_io_handle *
pci_device_open_io(struct pci_device *dev, pciaddr_t base, pciaddr_t size)
{
struct pci_io_handle *ret;
int bar;
if (!pci_sys->methods->open_device_io)
return NULL;
for (bar = 0; bar < 6; bar++) {
struct pci_mem_region *region = &(dev->regions[bar]);
if (!region->is_IO)
continue;
if (base < region->base_addr || base > (region->base_addr+region->size))
continue;
if ((base + size) > (region->base_addr + region->size))
continue;
ret = new_io_handle();
if (!ret)
return NULL;
if (!pci_sys->methods->open_device_io(ret, dev, bar, base, size)) {
delete_io_handle(ret);
return NULL;
}
return ret;
}
return NULL;
}
/**
* Open a handle to the legacy I/O space for the PCI domain containing
* \c dev. \c size is in bytes.
*
* \returns
* An opaque handle to the requested range, or \c NULL on error.
*/
struct pci_io_handle *
pci_legacy_open_io(struct pci_device *dev, pciaddr_t base, pciaddr_t size)
{
struct pci_io_handle *ret;
if (!pci_sys->methods->open_legacy_io)
return NULL;
ret = new_io_handle();
if (!ret)
return NULL;
if (!pci_sys->methods->open_legacy_io(ret, dev, base, size)) {
delete_io_handle(ret);
return NULL;
}
return ret;
}
/**
* Close an I/O handle.
*/
void
pci_device_close_io(struct pci_device *dev, struct pci_io_handle *handle)
{
if (dev && handle && pci_sys->methods->close_io)
pci_sys->methods->close_io(dev, handle);
delete_io_handle(handle);
}
/**
* Read a 32-bit value from the I/O space. \c reg is relative to the
* \c base specified when the handle was opened. Some platforms may
* require that \c reg be 32-bit-aligned.
*
* \returns
* The value read from the I/O port, or undefined on any error.
*/
uint32_t
pci_io_read32(struct pci_io_handle *handle, uint32_t reg)
{
if (reg + 4 > handle->size)
return UINT32_MAX;
return pci_sys->methods->read32(handle, reg);
}
/**
* Read a 16-bit value from the I/O space. \c reg is relative to the
* \c base specified when the handle was opened. Some platforms may
* require that \c reg be 16-bit-aligned.
*
* \returns
* The value read from the I/O port, or undefined on any error.
*/
uint16_t
pci_io_read16(struct pci_io_handle *handle, uint32_t reg)
{
if (reg + 2 > handle->size)
return UINT16_MAX;
return pci_sys->methods->read16(handle, reg);
}
/**
* Read a 8-bit value from the I/O space. \c reg is relative to the
* \c base specified when the handle was opened.
*
* \returns
* The value read from the I/O port, or undefined on any error.
*/
uint8_t
pci_io_read8(struct pci_io_handle *handle, uint32_t reg)
{
if (reg + 1 > handle->size)
return UINT8_MAX;
return pci_sys->methods->read8(handle, reg);
}
/**
* Write a 32-bit value to the I/O space. \c reg is relative to the
* \c base specified when the handle was opened. Some platforms may
* require that \c reg be 32-bit-aligned.
*/
void
pci_io_write32(struct pci_io_handle *handle, uint32_t reg, uint32_t data)
{
if (reg + 4 > handle->size)
return;
pci_sys->methods->write32(handle, reg, data);
}
/**
* Write a 16-bit value to the I/O space. \c reg is relative to the
* \c base specified when the handle was opened. Some platforms may
* require that \c reg be 16-bit-aligned.
*/
void
pci_io_write16(struct pci_io_handle *handle, uint32_t reg, uint16_t data)
{
if (reg + 2 > handle->size)
return;
pci_sys->methods->write16(handle, reg, data);
}
/**
* Write a 8-bit value to the I/O space. \c reg is relative to the
* \c base specified when the handle was opened.
*/
void
pci_io_write8(struct pci_io_handle *handle, uint32_t reg, uint8_t data)
{
if (reg + 1 > handle->size)
return;
pci_sys->methods->write8(handle, reg, data);
}
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