2 * This file is part of the libpayload project.
4 * Copyright (C) 2010 coresystems GmbH
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <libpayload.h>
35 static pcidev_t libpci_to_lb(struct pci_dev *dev)
37 return PCI_DEV(dev->bus, dev->dev, dev->func);
40 /* libpci interface */
41 u8 pci_read_byte(struct pci_dev *dev, int pos)
43 return pci_read_config8(libpci_to_lb(dev), pos);
46 u16 pci_read_word(struct pci_dev *dev, int pos)
48 return pci_read_config16(libpci_to_lb(dev), pos);
51 u32 pci_read_long(struct pci_dev *dev, int pos)
53 return pci_read_config32(libpci_to_lb(dev), pos);
56 int pci_write_byte(struct pci_dev *dev, int pos, u8 data)
58 pci_write_config8(libpci_to_lb(dev), pos, data);
59 return 1; /* success */
62 int pci_write_word(struct pci_dev *dev, int pos, u16 data)
64 pci_write_config16(libpci_to_lb(dev), pos, data);
65 return 1; /* success */
68 int pci_write_long(struct pci_dev *dev, int pos, u32 data)
70 pci_write_config32(libpci_to_lb(dev), pos, data);
71 return 1; /* success */
74 struct pci_access *pci_alloc(void)
76 struct pci_access *pacc = malloc(sizeof(*pacc));
80 void pci_init(struct pci_access *pacc)
82 memset(pacc, 0, sizeof(*pacc));
85 void pci_cleanup(__attribute__ ((unused)) struct pci_access *pacc)
89 void pci_filter_init(struct pci_access* pacc, struct pci_filter* pf)
99 static char *invalid_pci_device_string = (char *)"invalid pci device string";
101 /* parse domain:bus:dev.func (with all components but "dev" optional)
103 * Returns NULL on success, a string pointer to the error message otherwise.
105 char *pci_filter_parse_slot(struct pci_filter* filter, const char* id)
109 filter->func = filter->dev = filter->bus = filter->domain = -1;
111 char *funcp = strrchr(id, '.');
113 filter->func = strtoul(funcp+1, &endptr, 0);
114 if (endptr[0] != '\0') return invalid_pci_device_string;
117 char *devp = strrchr(id, ':');
119 filter->dev = strtoul(id, &endptr, 0);
121 filter->dev = strtoul(devp+1, &endptr, 0);
123 if (endptr != funcp) return invalid_pci_device_string;
124 if (!devp) return NULL;
126 char *busp = strchr(id, ':');
128 filter->bus = strtoul(id, &endptr, 0);
130 filter->bus = strtoul(busp+1, &endptr, 0);
132 if (endptr != funcp) return invalid_pci_device_string;
133 if (busp == devp) return NULL;
135 filter->domain = strtoul(id, &endptr, 0);
136 if (endptr != busp) return invalid_pci_device_string;
141 int pci_filter_match(struct pci_filter* pf, struct pci_dev* dev)
143 if ((pf->domain > -1) && (pf->domain != dev->domain))
145 if ((pf->bus > -1) && (pf->bus != dev->bus))
147 if ((pf->dev > -1) && (pf->dev != dev->dev))
149 if ((pf->func > -1) && (pf->func != dev->func))
151 if ((pf->vendor > -1) && (pf->vendor != dev->vendor_id))
153 if ((pf->device > -1) && (pf->device != dev->device_id))
158 static struct pci_dev *pci_scan_single_bus(struct pci_dev *dev, int bus)
164 for (devfn = 0; devfn < 0x100; devfn++) {
165 int func = devfn & 0x7;
166 int slot = (devfn >> 3) & 0x1f;
168 val = pci_read_config32(PCI_DEV(bus, slot, func),
171 if (val == 0xffffffff || val == 0x00000000 ||
172 val == 0x0000ffff || val == 0xffff0000)
175 dev->next = malloc(sizeof(struct pci_dev));
181 dev->vendor_id = val & 0xffff;
182 dev->device_id = val >> 16;
185 hdr = pci_read_config8(PCI_DEV(bus, slot, func),
189 if (hdr == HEADER_TYPE_BRIDGE || hdr == HEADER_TYPE_CARDBUS) {
191 busses = pci_read_config32(PCI_DEV(bus, slot, func),
193 busses = (busses >> 8) & 0xFF;
195 /* Avoid recursion if the new bus is the same as
196 * the old bus (insert lame The Who joke here) */
199 dev = pci_scan_single_bus(dev, busses);
206 void pci_scan_bus(struct pci_access* pacc)
208 struct pci_dev rootdev;
209 pci_scan_single_bus(&rootdev, 0);
210 pacc->devices = rootdev.next;
213 struct pci_dev *pci_get_dev(struct pci_access* pacc, u16 domain, u8 bus, u8 dev, u8 func)
215 struct pci_dev *cur = malloc(sizeof(*cur));
216 cur->domain = domain;