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-rw-r--r--lib/fbsd-device.c366
1 files changed, 366 insertions, 0 deletions
diff --git a/lib/fbsd-device.c b/lib/fbsd-device.c
new file mode 100644
index 0000000..2ea5e84
--- /dev/null
+++ b/lib/fbsd-device.c
@@ -0,0 +1,366 @@
+/*
+ * The PCI Library -- FreeBSD /dev/pci access
+ *
+ * Copyright (c) 1999 Jari Kirma <kirma@cs.hut.fi>
+ * Updated in 2003 by Samy Al Bahra <samy@kerneled.com>
+ * Updated in 2017 by Imre Vadász <imrevdsz@gmail.com>
+ *
+ * Can be freely distributed and used under the terms of the GNU GPL v2+.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <osreldate.h>
+#include <stdint.h>
+
+#ifdef __FreeBSD_kernel_version
+# ifndef __FreeBSD_version
+# define __FreeBSD_version __FreeBSD_kernel_version
+# endif
+#endif
+
+#if __FreeBSD_version < 430000 && !defined(__DragonFly__)
+# include <pci/pcivar.h>
+# include <pci/pci_ioctl.h>
+#else
+# include <sys/pciio.h>
+#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 = {
+ "fbsd-device",
+ "FreeBSD /dev/pci device",
+ fbsd_config,
+ fbsd_detect,
+ fbsd_init,
+ fbsd_cleanup,
+ fbsd_scan,
+ fbsd_fill_info,
+ fbsd_read,
+ fbsd_write,
+ NULL, /* read_vpd */
+ NULL, /* dev_init */
+ NULL /* dev_cleanup */
+};
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