/* * The PCI Library -- FreeBSD /dev/pci access * * Copyright (c) 1999 Jari Kirma * Updated in 2003 by Samy Al Bahra * Updated in 2017 by Imre Vadász * * Can be freely distributed and used under the terms of the GNU GPL v2+. * * SPDX-License-Identifier: GPL-2.0-or-later */ #include #include #include #include #include #include #include #include #ifdef __FreeBSD_kernel_version # ifndef __FreeBSD_version # define __FreeBSD_version __FreeBSD_kernel_version # endif #endif #if __FreeBSD_version < 430000 && !defined(__DragonFly__) # include # include #else # include #endif #include "internal.h" static void fbsd_config(struct pci_access *a) { pci_define_param(a, "fbsd.path", PCI_PATH_FBSD_DEVICE, "Path to the FreeBSD PCI device"); } static int fbsd_detect(struct pci_access *a) { char *name = pci_get_param(a, "fbsd.path"); if (access(name, R_OK)) { a->warning("Cannot open %s", name); return 0; } a->debug("...using %s", name); return 1; } static void fbsd_init(struct pci_access *a) { char *name = pci_get_param(a, "fbsd.path"); int fd; a->fd = -1; a->fd_rw = -1; /* * When opening /dev/pci as read-write fails, retry with readonly which * will still allow us to gain some information via the PCIOCGETCONF and * PCIOCGETBAR IOCTLs, even without generic read access to the PCI config * space. */ fd = open(name, O_RDWR, 0); if (fd < 0) { fd = open(name, O_RDONLY, 0); if (fd < 0) a->error("fbsd_init: %s open failed", name); else { a->debug("fbsd_init: Fallback to read-only opened %s", name); a->fd = fd; } } else a->fd_rw = fd; } static void fbsd_cleanup(struct pci_access *a) { if (a->fd >= 0) { close(a->fd); a->fd = -1; } if (a->fd_rw >= 0) { close(a->fd_rw); a->fd_rw = -1; } } static void fbsd_scan(struct pci_access *a) { struct pci_conf_io conf; struct pci_conf *matches; struct pci_dev *t; uint32_t offset = 0; unsigned int i; matches = calloc(32, sizeof(struct pci_conf)); if (matches == NULL) { a->error("calloc: %s", strerror(errno)); return; } conf.generation = 0; do { conf.pat_buf_len = 0; conf.num_patterns = 0; conf.patterns = NULL; conf.match_buf_len = 32 * sizeof(struct pci_conf); conf.num_matches = 32; conf.matches = matches; conf.offset = offset; conf.status = 0; if (ioctl(a->fd_rw >= 0 ? a->fd_rw : a->fd, PCIOCGETCONF, &conf) < 0) { if (errno == ENODEV) break; a->error("fbsd_scan: ioctl(PCIOCGETCONF) failed: %s", strerror(errno)); } /* PCI_GETCONF_LIST_CHANGED would require us to start over. */ if (conf.status == PCI_GETCONF_ERROR || conf.status == PCI_GETCONF_LIST_CHANGED) { a->error("fbsd_scan: ioctl(PCIOCGETCONF) failed"); break; } for (i = 0; i < conf.num_matches; i++) { t = pci_alloc_dev(a); t->bus = matches[i].pc_sel.pc_bus; t->dev = matches[i].pc_sel.pc_dev; t->func = matches[i].pc_sel.pc_func; t->domain = matches[i].pc_sel.pc_domain; t->domain_16 = matches[i].pc_sel.pc_domain; t->vendor_id = matches[i].pc_vendor; t->device_id = matches[i].pc_device; t->known_fields = PCI_FILL_IDENT; t->hdrtype = matches[i].pc_hdr; pci_link_dev(a, t); } offset += conf.num_matches; } while (conf.status == PCI_GETCONF_MORE_DEVS); free(matches); } static void fbsd_fill_info(struct pci_dev *d, unsigned int flags) { struct pci_conf_io conf; struct pci_bar_io bar; struct pci_match_conf pattern; struct pci_conf match; int i; if (d->access->fd_rw >= 0) return pci_generic_fill_info(d, flags); /* * Can only handle PCI_FILL_IDENT, PCI_FILL_CLASS, PCI_FILL_BASES and * PCI_FILL_SIZES requests with the PCIOCGETCONF and PCIOCGETBAR IOCTLs. */ conf.pat_buf_len = sizeof(struct pci_match_conf); conf.num_patterns = 1; conf.patterns = &pattern; conf.match_buf_len = sizeof(struct pci_conf); conf.num_matches = 1; conf.matches = &match; conf.offset = 0; conf.generation = 0; conf.status = 0; pattern.pc_sel.pc_domain = d->domain; pattern.pc_sel.pc_bus = d->bus; pattern.pc_sel.pc_dev = d->dev; pattern.pc_sel.pc_func = d->func; pattern.flags = PCI_GETCONF_MATCH_DOMAIN | PCI_GETCONF_MATCH_BUS | PCI_GETCONF_MATCH_DEV | PCI_GETCONF_MATCH_FUNC; if (ioctl(d->access->fd, PCIOCGETCONF, &conf) < 0) { if (errno != ENODEV) d->access->error("fbsd_fill_info: ioctl(PCIOCGETCONF) failed: %s", strerror(errno)); return; } if (want_fill(d, flags, PCI_FILL_IDENT)) { d->vendor_id = match.pc_vendor; d->device_id = match.pc_device; } if (want_fill(d, flags, PCI_FILL_CLASS)) d->device_class = (match.pc_class << 8) | match.pc_subclass; if (want_fill(d, flags, PCI_FILL_BASES | PCI_FILL_SIZES)) { d->rom_base_addr = 0; d->rom_size = 0; for (i = 0; i < 6; i++) { bar.pbi_sel.pc_domain = d->domain; bar.pbi_sel.pc_bus = d->bus; bar.pbi_sel.pc_dev = d->dev; bar.pbi_sel.pc_func = d->func; bar.pbi_reg = 0x10 + 4*i; bar.pbi_enabled = 0; bar.pbi_base = 0; bar.pbi_length = 0; if (ioctl(d->access->fd, PCIOCGETBAR, &bar) < 0) { if (errno == ENODEV) return; if (errno == EINVAL) { d->base_addr[i] = 0; d->size[i] = 0; } else d->access->error("fbsd_fill_info: ioctl(PCIOCGETBAR) failed: %s", strerror(errno)); } else { d->base_addr[i] = bar.pbi_base; d->size[i] = bar.pbi_length; } } } } static int fbsd_read(struct pci_dev *d, int pos, byte *buf, int len) { struct pci_io pi; if (d->access->fd_rw < 0) { d->access->warning("fbsd_read: missing permissions"); return 0; } if (!(len == 1 || len == 2 || len == 4)) return pci_generic_block_read(d, pos, buf, len); if (pos >= 4096) return 0; #if __FreeBSD_version >= 700053 || defined(__DragonFly__) pi.pi_sel.pc_domain = d->domain; #else if (d->domain) return 0; #endif pi.pi_sel.pc_bus = d->bus; pi.pi_sel.pc_dev = d->dev; pi.pi_sel.pc_func = d->func; pi.pi_reg = pos; pi.pi_width = len; if (ioctl(d->access->fd_rw, PCIOCREAD, &pi) < 0) { if (errno == ENODEV) return 0; d->access->error("fbsd_read: ioctl(PCIOCREAD) failed: %s", strerror(errno)); } switch (len) { case 1: buf[0] = (u8) pi.pi_data; break; case 2: ((u16 *) buf)[0] = cpu_to_le16((u16) pi.pi_data); break; case 4: ((u32 *) buf)[0] = cpu_to_le32((u32) pi.pi_data); break; } return 1; } static int fbsd_write(struct pci_dev *d, int pos, byte *buf, int len) { struct pci_io pi; if (d->access->fd_rw < 0) { d->access->warning("fbsd_write: missing permissions"); return 0; } if (!(len == 1 || len == 2 || len == 4)) return pci_generic_block_write(d, pos, buf, len); if (pos >= 4096) return 0; #if __FreeBSD_version >= 700053 || defined(__DragonFly__) pi.pi_sel.pc_domain = d->domain; #else if (d->domain) return 0; #endif pi.pi_sel.pc_bus = d->bus; pi.pi_sel.pc_dev = d->dev; pi.pi_sel.pc_func = d->func; pi.pi_reg = pos; pi.pi_width = len; switch (len) { case 1: pi.pi_data = buf[0]; break; case 2: pi.pi_data = le16_to_cpu(((u16 *) buf)[0]); break; case 4: pi.pi_data = le32_to_cpu(((u32 *) buf)[0]); break; } if (ioctl(d->access->fd_rw, PCIOCWRITE, &pi) < 0) { if (errno == ENODEV) return 0; d->access->error("fbsd_write: ioctl(PCIOCWRITE) failed: %s", strerror(errno)); } return 1; } struct pci_methods pm_fbsd_device = { .name = "fbsd-device", .help = "FreeBSD /dev/pci device", .config = fbsd_config, .detect = fbsd_detect, .init = fbsd_init, .cleanup = fbsd_cleanup, .scan = fbsd_scan, .fill_info = fbsd_fill_info, .read = fbsd_read, .write = fbsd_write, };