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/* $OpenBSD: pci.h,v 1.8 2020/09/08 20:09:43 kettenis Exp $ */
/*
* Copyright (c) 2015 Mike Larkin <mlarkin@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define PCI_MODE1_ENABLE 0x80000000UL
#define PCI_MODE1_ADDRESS_REG 0x0cf8
#define PCI_MODE1_DATA_REG 0x0cfc
#define PCI_CONFIG_MAX_DEV 32
#define PCI_MAX_BARS 6
#define PCI_BAR_TYPE_IO 0x0
#define PCI_BAR_TYPE_MMIO 0x1
#define PCI_MAX_PIC_IRQS 10
typedef int (*pci_cs_fn_t)(int dir, uint8_t reg, uint32_t *data);
typedef int (*pci_iobar_fn_t)(int dir, uint16_t reg, uint32_t *data, uint8_t *,
void *, uint8_t);
typedef int (*pci_mmiobar_fn_t)(int dir, uint32_t ofs, uint32_t *data);
struct pci_dev {
union {
uint32_t pd_cfg_space[PCI_CONFIG_SPACE_SIZE / 4];
struct {
uint16_t pd_vid;
uint16_t pd_did;
uint16_t pd_cmd;
uint16_t pd_status;
uint8_t pd_rev;
uint8_t pd_prog_if;
uint8_t pd_subclass;
uint8_t pd_class;
uint8_t pd_cache_size;
uint8_t pd_lat_timer;
uint8_t pd_header_type;
uint8_t pd_bist;
uint32_t pd_bar[PCI_MAX_BARS];
uint32_t pd_cardbus_cis;
uint16_t pd_subsys_vid;
uint16_t pd_subsys_id;
uint32_t pd_exp_rom_addr;
uint8_t pd_cap;
uint32_t pd_reserved0 : 24;
uint32_t pd_reserved1;
uint8_t pd_irq;
uint8_t pd_int;
uint8_t pd_min_grant;
uint8_t pd_max_grant;
} __packed;
};
uint8_t pd_bar_ct;
pci_cs_fn_t pd_csfunc;
uint8_t pd_bartype[PCI_MAX_BARS];
uint32_t pd_barsize[PCI_MAX_BARS];
void *pd_barfunc[PCI_MAX_BARS];
void *pd_bar_cookie[PCI_MAX_BARS];
};
struct pci {
uint8_t pci_dev_ct;
uint64_t pci_next_mmio_bar;
uint64_t pci_next_io_bar;
uint8_t pci_next_pic_irq;
uint32_t pci_addr_reg;
uint32_t pci_data_reg;
struct pci_dev pci_devices[PCI_CONFIG_MAX_DEV];
};
void pci_handle_address_reg(struct vm_run_params *);
void pci_handle_data_reg(struct vm_run_params *);
uint8_t pci_handle_io(struct vm_run_params *);
void pci_init(void);
int pci_add_device(uint8_t *, uint16_t, uint16_t, uint8_t, uint8_t, uint16_t,
uint16_t, uint8_t, pci_cs_fn_t);
int pci_add_bar(uint8_t, uint32_t, void *, void *);
int pci_set_bar_fn(uint8_t, uint8_t, void *, void *);
uint8_t pci_get_dev_irq(uint8_t);
int pci_dump(int);
int pci_restore(int);
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