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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2010 coresystems GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <libpayload.h>
#include <pci.h>
#include <pci/pci.h>
/* libpci shim */
static pcidev_t libpci_to_lb(struct pci_dev *dev)
{
return PCI_DEV(dev->bus, dev->dev, dev->func);
}
/* libpci interface */
u8 pci_read_byte(struct pci_dev *dev, int pos)
{
return pci_read_config8(libpci_to_lb(dev), pos);
}
u16 pci_read_word(struct pci_dev *dev, int pos)
{
return pci_read_config16(libpci_to_lb(dev), pos);
}
u32 pci_read_long(struct pci_dev *dev, int pos)
{
return pci_read_config32(libpci_to_lb(dev), pos);
}
int pci_write_byte(struct pci_dev *dev, int pos, u8 data)
{
pci_write_config8(libpci_to_lb(dev), pos, data);
return 1; /* success */
}
int pci_write_word(struct pci_dev *dev, int pos, u16 data)
{
pci_write_config16(libpci_to_lb(dev), pos, data);
return 1; /* success */
}
int pci_write_long(struct pci_dev *dev, int pos, u32 data)
{
pci_write_config32(libpci_to_lb(dev), pos, data);
return 1; /* success */
}
struct pci_access *pci_alloc(void)
{
struct pci_access *pacc = malloc(sizeof(*pacc));
return pacc;
}
void pci_init(struct pci_access* pacc)
{
memset(pacc, 0, sizeof(*pacc));
}
void pci_filter_init(struct pci_access* pacc, struct pci_filter* pf)
{
pf->domain = -1;
pf->bus = -1;
pf->dev = -1;
pf->func = -1;
pf->vendor = -1;
pf->device = -1;
}
/* parse domain:bus:dev.func (with all components but "dev" optional)
* into filter.
* Returns NULL on success, a string pointer to the error message otherwise.
*/
char *pci_filter_parse_slot(struct pci_filter* filter, const char* id)
{
char *endptr;
filter->func = filter->dev = filter->bus = filter->domain = -1;
char *funcp = strrchr(id, '.');
if (funcp) {
filter->func = strtoul(funcp+1, &endptr, 0);
if (endptr[0] != '\0') return "invalid pci device string";
}
char *devp = strrchr(id, ':');
if (!devp) {
filter->dev = strtoul(id, &endptr, 0);
} else {
filter->dev = strtoul(devp+1, &endptr, 0);
}
if (endptr != funcp) return "invalid pci device string";
if (!devp) return NULL;
char *busp = strchr(id, ':');
if (busp == devp) {
filter->bus = strtoul(id, &endptr, 0);
} else {
filter->bus = strtoul(busp+1, &endptr, 0);
}
if (endptr != funcp) return "invalid pci device string";
if (busp == devp) return NULL;
filter->domain = strtoul(id, &endptr, 0);
if (endptr != busp) return "invalid pci device string";
return NULL;
}
int pci_filter_match(struct pci_filter* pf, struct pci_dev* dev)
{
if ((pf->domain > -1) && (pf->domain != dev->domain))
return 0;
if ((pf->bus > -1) && (pf->bus != dev->bus))
return 0;
if ((pf->dev > -1) && (pf->dev != dev->dev))
return 0;
if ((pf->func > -1) && (pf->func != dev->func))
return 0;
if ((pf->vendor > -1) && (pf->vendor != dev->vendor_id))
return 0;
if ((pf->device > -1) && (pf->device != dev->device_id))
return 0;
return 1;
}
static struct pci_dev *pci_scan_single_bus(struct pci_dev *dev, int bus)
{
int devfn;
u32 val;
unsigned char hdr;
for (devfn = 0; devfn < 0x100; devfn++) {
int func = devfn & 0x7;
int slot = (devfn >> 3) & 0x1f;
val = pci_read_config32(PCI_DEV(bus, slot, func),
REG_VENDOR_ID);
if (val == 0xffffffff || val == 0x00000000 ||
val == 0x0000ffff || val == 0xffff0000)
continue;
dev->next = malloc(sizeof(struct pci_dev));
dev = dev->next;
dev->domain = 0;
dev->bus = bus;
dev->dev = slot;
dev->func = func;
dev->vendor_id = val & 0xffff;
dev->device_id = val >> 16;
dev->next = 0;
hdr = pci_read_config8(PCI_DEV(bus, slot, func),
REG_HEADER_TYPE);
hdr &= 0x7F;
if (hdr == HEADER_TYPE_BRIDGE || hdr == HEADER_TYPE_CARDBUS) {
unsigned int busses;
busses = pci_read_config32(PCI_DEV(bus, slot, func),
REG_PRIMARY_BUS);
busses = (busses >> 8) & 0xFF;
/* Avoid recursion if the new bus is the same as
* the old bus (insert lame The Who joke here) */
if (busses != bus)
dev = pci_scan_single_bus(dev, busses);
}
}
return dev;
}
void pci_scan_bus(struct pci_access* pacc)
{
struct pci_dev rootdev;
pci_scan_single_bus(&rootdev, 0);
pacc->devices = rootdev.next;
}
struct pci_dev *pci_get_dev(struct pci_access* pacc, u16 domain, u8 bus, u8 dev, u8 func)
{
struct pci_dev *cur = malloc(sizeof(*cur));
cur->domain = domain;
cur->bus = bus;
cur->dev = dev;
cur->func = func;
return cur;
}
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