2 * The PCI Library -- Reading of Bus Dumps
4 * Copyright (c) 1997--2008 Martin Mares <mj@ucw.cz>
6 * Can be freely distributed and used under the terms of the GNU GPL v2+.
8 * SPDX-License-Identifier: GPL-2.0-or-later
24 dump_config(struct pci_access *a)
26 pci_define_param(a, "dump.name", "", "Name of the bus dump file to read from");
30 dump_detect(struct pci_access *a)
32 char *name = pci_get_param(a, "dump.name");
33 return name && name[0];
37 dump_alloc_data(struct pci_dev *dev, int len)
39 struct dump_data *dd = pci_malloc(dev->access, sizeof(struct dump_data) + len - 1);
42 memset(dd->data, 0xff, len);
43 dev->backend_data = dd;
47 dump_validate(char *s, char *fmt)
51 if (*fmt == '#' ? !isxdigit(*s) : *fmt != *s)
59 dump_init(struct pci_access *a)
61 char *name = pci_get_param(a, "dump.name");
64 struct pci_dev *dev = NULL;
65 int len, mn, bn, dn, fn, i, j;
68 a->error("dump: File name not given.");
69 if (!(f = fopen(name, "r")))
70 a->error("dump: Cannot open %s: %s", name, strerror(errno));
71 while (fgets(buf, sizeof(buf)-1, f))
73 char *z = strchr(buf, '\n');
77 a->error("dump: line too long or unterminated");
80 if (z >= buf && *z == '\r')
84 if (dump_validate(buf, "##:##.# ") && sscanf(buf, "%x:%x.%d", &bn, &dn, &fn) == 3 ||
85 dump_validate(buf, "####:##:##.# ") && sscanf(buf, "%x:%x:%x.%d", &mn, &bn, &dn, &fn) == 4 ||
86 dump_validate(buf, "#####:##:##.# ") && sscanf(buf, "%x:%x:%x.%d", &mn, &bn, &dn, &fn) == 4 ||
87 dump_validate(buf, "######:##:##.# ") && sscanf(buf, "%x:%x:%x.%d", &mn, &bn, &dn, &fn) == 4)
89 dev = pci_get_dev(a, mn, bn, dn, fn);
90 dump_alloc_data(dev, 256);
96 (dump_validate(buf, "##: ") || dump_validate(buf, "###: ") || dump_validate(buf, "####: ") ||
97 dump_validate(buf, "#####: ") || dump_validate(buf, "######: ") ||
98 dump_validate(buf, "#######: ") || dump_validate(buf, "########: ")) &&
99 sscanf(buf, "%x: ", &i) == 1)
101 struct dump_data *dd = dev->backend_data;
102 z = strchr(buf, ' ') + 1;
103 while (isxdigit(z[0]) && isxdigit(z[1]) && (!z[2] || z[2] == ' ') &&
104 sscanf(z, "%x", &j) == 1 && j < 256)
109 a->error("dump: At most 4096 bytes of config space are supported");
111 if (i >= dd->allocated) /* Need to re-allocate the buffer */
113 dump_alloc_data(dev, 4096);
114 memcpy(((struct dump_data *) dev->backend_data)->data, dd->data, 256);
116 dd = dev->backend_data;
128 a->error("dump: Malformed line");
136 dump_cleanup(struct pci_access *a UNUSED)
141 dump_scan(struct pci_access *a UNUSED)
146 dump_read(struct pci_dev *d, int pos, byte *buf, int len)
148 struct dump_data *dd;
149 if (!(dd = d->backend_data))
151 struct pci_dev *e = d->access->devices;
152 while (e && (e->domain != d->domain || e->bus != d->bus || e->dev != d->dev || e->func != d->func))
156 dd = e->backend_data;
158 if (pos + len > dd->len)
160 memcpy(buf, dd->data + pos, len);
165 dump_write(struct pci_dev *d UNUSED, int pos UNUSED, byte *buf UNUSED, int len UNUSED)
167 d->access->error("Writing to dump files is not supported.");
172 dump_cleanup_dev(struct pci_dev *d)
176 pci_mfree(d->backend_data);
177 d->backend_data = NULL;
181 struct pci_methods pm_dump = {
183 .help = "Reading of register dumps (set the `dump.name' parameter)",
184 .config = dump_config,
185 .detect = dump_detect,
187 .cleanup = dump_cleanup,
189 .fill_info = pci_generic_fill_info,
192 .cleanup_dev = dump_cleanup_dev,