mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2025-05-05 06:56:57 +00:00
9cc1f57f63
In order to allow these functions to be called without an associated struct pci_pdev (for example, at the time of PCI bus enumeration), these two functions can not take the struct vdev as input parameter. Tracked-On: #1568 Signed-off-by: dongshen <dongsheng.x.zhang@intel.com> Signed-off-by: Zide Chen <zide.chen@intel.com> Reviewed-by: Zhao Yakui <yakui.zhao@intel.com> Acked-by: Anthony Xu <anthony.xu@intel.com>
101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
/*
|
|
* Copyright (c) 2011 NetApp, Inc.
|
|
* Copyright (c) 2018 Intel Corporation
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <hypervisor.h>
|
|
#include <pci.h>
|
|
|
|
static spinlock_t pci_device_lock = {
|
|
.head = 0U,
|
|
.tail = 0U
|
|
};
|
|
|
|
static uint32_t pci_pdev_calc_address(union pci_bdf bdf, uint32_t offset)
|
|
{
|
|
uint32_t addr = (uint32_t)bdf.value;
|
|
|
|
addr <<= 8U;
|
|
addr |= (offset | PCI_CFG_ENABLE);
|
|
return addr;
|
|
}
|
|
|
|
uint32_t pci_pdev_read_cfg(union pci_bdf bdf, uint32_t offset, uint32_t bytes)
|
|
{
|
|
uint32_t addr;
|
|
uint32_t val;
|
|
|
|
spinlock_obtain(&pci_device_lock);
|
|
|
|
addr = pci_pdev_calc_address(bdf, offset);
|
|
|
|
/* Write address to ADDRESS register */
|
|
pio_write32(addr, PCI_CONFIG_ADDR);
|
|
|
|
/* Read result from DATA register */
|
|
switch (bytes) {
|
|
case 1U:
|
|
val = (uint32_t)pio_read8(PCI_CONFIG_DATA + ((uint16_t)offset & 3U));
|
|
break;
|
|
case 2U:
|
|
val = (uint32_t)pio_read16(PCI_CONFIG_DATA + ((uint16_t)offset & 2U));
|
|
break;
|
|
default:
|
|
val = pio_read32(PCI_CONFIG_DATA);
|
|
break;
|
|
}
|
|
spinlock_release(&pci_device_lock);
|
|
|
|
return val;
|
|
}
|
|
|
|
void pci_pdev_write_cfg(union pci_bdf bdf, uint32_t offset, uint32_t bytes, uint32_t val)
|
|
{
|
|
uint32_t addr;
|
|
|
|
spinlock_obtain(&pci_device_lock);
|
|
|
|
addr = pci_pdev_calc_address(bdf, offset);
|
|
|
|
/* Write address to ADDRESS register */
|
|
pio_write32(addr, PCI_CONFIG_ADDR);
|
|
|
|
/* Write value to DATA register */
|
|
switch (bytes) {
|
|
case 1U:
|
|
pio_write8((uint8_t)val, PCI_CONFIG_DATA + ((uint16_t)offset & 3U));
|
|
break;
|
|
case 2U:
|
|
pio_write16((uint16_t)val, PCI_CONFIG_DATA + ((uint16_t)offset & 2U));
|
|
break;
|
|
default:
|
|
pio_write32(val, PCI_CONFIG_DATA);
|
|
break;
|
|
}
|
|
spinlock_release(&pci_device_lock);
|
|
}
|