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_filter_init(struct pci_access* pacc, struct pci_filter* pf)
95 /* parse domain:bus:dev.func (with all components but "dev" optional)
97 * Returns NULL on success, a string pointer to the error message otherwise.
99 char *pci_filter_parse_slot(struct pci_filter* filter, const char* id)
103 filter->func = filter->dev = filter->bus = filter->domain = -1;
105 char *funcp = strrchr(id, '.');
107 filter->func = strtoul(funcp+1, &endptr, 0);
108 if (endptr[0] != '\0') return "invalid pci device string";
111 char *devp = strrchr(id, ':');
113 filter->dev = strtoul(id, &endptr, 0);
115 filter->dev = strtoul(devp+1, &endptr, 0);
117 if (endptr != funcp) return "invalid pci device string";
118 if (!devp) return NULL;
120 char *busp = strchr(id, ':');
122 filter->bus = strtoul(id, &endptr, 0);
124 filter->bus = strtoul(busp+1, &endptr, 0);
126 if (endptr != funcp) return "invalid pci device string";
127 if (busp == devp) return NULL;
129 filter->domain = strtoul(id, &endptr, 0);
130 if (endptr != busp) return "invalid pci device string";
135 int pci_filter_match(struct pci_filter* pf, struct pci_dev* dev)
137 if ((pf->domain > -1) && (pf->domain != dev->domain))
139 if ((pf->bus > -1) && (pf->bus != dev->bus))
141 if ((pf->dev > -1) && (pf->dev != dev->dev))
143 if ((pf->func > -1) && (pf->func != dev->func))
145 if ((pf->vendor > -1) && (pf->vendor != dev->vendor_id))
147 if ((pf->device > -1) && (pf->device != dev->device_id))
152 static struct pci_dev *pci_scan_single_bus(struct pci_dev *dev, int bus)
158 for (devfn = 0; devfn < 0x100; devfn++) {
159 int func = devfn & 0x7;
160 int slot = (devfn >> 3) & 0x1f;
162 val = pci_read_config32(PCI_DEV(bus, slot, func),
165 if (val == 0xffffffff || val == 0x00000000 ||
166 val == 0x0000ffff || val == 0xffff0000)
169 dev->next = malloc(sizeof(struct pci_dev));
175 dev->vendor_id = val & 0xffff;
176 dev->device_id = val >> 16;
179 hdr = pci_read_config8(PCI_DEV(bus, slot, func),
183 if (hdr == HEADER_TYPE_BRIDGE || hdr == HEADER_TYPE_CARDBUS) {
185 busses = pci_read_config32(PCI_DEV(bus, slot, func),
187 busses = (busses >> 8) & 0xFF;
189 /* Avoid recursion if the new bus is the same as
190 * the old bus (insert lame The Who joke here) */
193 dev = pci_scan_single_bus(dev, busses);
200 void pci_scan_bus(struct pci_access* pacc)
202 struct pci_dev rootdev;
203 pci_scan_single_bus(&rootdev, 0);
204 pacc->devices = rootdev.next;
207 struct pci_dev *pci_get_dev(struct pci_access* pacc, u16 domain, u8 bus, u8 dev, u8 func)
209 struct pci_dev *cur = malloc(sizeof(*cur));
210 cur->domain = domain;