2 * The PCI Library -- OpenBSD /dev/pci access
4 * Adapted from fbsd-device.c by Matthieu Herrb <matthieu.herrb@laas.fr>, 2006
6 * Can be freely distributed and used under the terms of the GNU GPL v2+.
8 * SPDX-License-Identifier: GPL-2.0-or-later
15 #include <sys/endian.h>
16 #include <sys/types.h>
17 #include <sys/ioctl.h>
18 #include <sys/pciio.h>
22 obsd_config(struct pci_access *a)
24 pci_define_param(a, "obsd.path", PCI_PATH_OBSD_DEVICE, "Path to the OpenBSD PCI device");
28 obsd_detect(struct pci_access *a)
30 char *name = pci_get_param(a, "obsd.path");
32 if (access(name, R_OK))
34 a->warning("Cannot open %s", name);
37 a->debug("...using %s", name);
42 obsd_init(struct pci_access *a)
44 char *name = pci_get_param(a, "obsd.path");
46 a->fd = open(name, O_RDWR, 0);
48 a->error("obsd_init: %s open failed", name);
52 obsd_cleanup(struct pci_access *a)
58 obsd_read(struct pci_dev *d, int pos, byte *buf, int len)
67 if (!(len == 1 || len == 2 || len == 4))
68 return pci_generic_block_read(d, pos, buf, len);
70 if (d->domain || pos >= 256)
73 pi.pi_sel.pc_bus = d->bus;
74 pi.pi_sel.pc_dev = d->dev;
75 pi.pi_sel.pc_func = d->func;
77 pi.pi_reg = pos - (pos % 4);
80 if (ioctl(d->access->fd, PCIOCREAD, &pi) < 0) {
82 pi.pi_data = 0xffffffff;
84 d->access->error("obsd_read: ioctl(PCIOCREAD) failed");
91 buf[0] = (u8) u.u8[pos % 4];
94 ((u16 *) buf)[0] = letoh16(u.u16[(pos % 4) / 2]);
97 ((u32 *) buf)[0] = (u32) letoh32(pi.pi_data);
104 obsd_write(struct pci_dev *d, int pos, byte *buf, int len)
108 if (!(len == 1 || len == 2 || len == 4))
109 return pci_generic_block_write(d, pos, buf, len);
111 if (d->domain || pos >= 256)
114 pi.pi_sel.pc_bus = d->bus;
115 pi.pi_sel.pc_dev = d->dev;
116 pi.pi_sel.pc_func = d->func;
127 pi.pi_data = ((u16 *) buf)[0];
130 pi.pi_data = ((u32 *) buf)[0];
134 if (ioctl(d->access->fd, PCIOCWRITE, &pi) < 0)
135 d->access->error("obsd_write: ioctl(PCIOCWRITE) failed");
140 struct pci_methods pm_obsd_device = {
142 "/dev/pci on OpenBSD",
148 pci_generic_fill_info,
153 NULL /* dev_cleanup */