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/*
* Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
* 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.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER 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.
*/
#ifndef _DEV_PCI_H_
#define _DEV_PCI_H_
#include <sys/syscall.h>
#include <sys/queue.h>
#include <sys/cdefs.h>
#include <dev/pci/pciregs.h>
#include <vm/vm.h>
/* Lookup bits */
#define PCI_DEVICE_ID __BIT(0)
#define PCI_VENDOR_ID __BIT(1)
#define PCI_CLASS __BIT(2)
#define PCI_SUBCLASS __BIT(3)
/* Base address masks for BARs */
#define PCI_BAR_MEMMASK ~7
#define PCI_BAR_IOMASK ~3
/* Macros to fetch base address from BAR */
#define PCI_BAR_MEMBASE(BAR) PHYS_TO_VIRT(BAR & PCI_BAR_MEMMASK)
#define PCI_BAR_IOBASE(BAR) PHYS_TO_VIRT(BAR & PCI_BAR_IOMASK)
/* For PCI lookups */
struct pci_lookup {
uint16_t device_id;
uint16_t vendor_id;
uint8_t pci_class;
uint8_t pci_subclass;
};
struct pci_device {
uint8_t bus;
uint8_t slot;
uint8_t func;
uint16_t device_id;
uint16_t vendor_id;
uint8_t pci_class;
uint8_t pci_subclass;
uint8_t prog_if;
uintptr_t bar[6];
uint8_t irq_line;
TAILQ_ENTRY(pci_device) link;
};
int pci_init(void);
uint32_t pci_readl(struct pci_device *dev, uint32_t offset);
void pci_writel(struct pci_device *dev, uint32_t offset, uint32_t val);
void pci_set_cmdreg(struct pci_device *dev, uint16_t bits);
int pci_map_bar(struct pci_device *dev, uint8_t bar, void **vap);
struct pci_device *pci_get_device(struct pci_lookup lookup, uint16_t lookup_type);
#endif /* !_DEV_PCI_H_ */
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