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-rw-r--r--payloads/libpayload/libpci/Makefile.inc30
-rw-r--r--payloads/libpayload/libpci/libpci.c216
2 files changed, 246 insertions, 0 deletions
diff --git a/payloads/libpayload/libpci/Makefile.inc b/payloads/libpayload/libpci/Makefile.inc
new file mode 100644
index 0000000000..5c3c3ea95f
--- /dev/null
+++ b/payloads/libpayload/libpci/Makefile.inc
@@ -0,0 +1,30 @@
+##
+## 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.
+##
+
+TARGETS-y += libpci/libpci.o
diff --git a/payloads/libpayload/libpci/libpci.c b/payloads/libpayload/libpci/libpci.c
new file mode 100644
index 0000000000..09b51e5133
--- /dev/null
+++ b/payloads/libpayload/libpci/libpci.c
@@ -0,0 +1,216 @@
+/*
+ * 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;
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 16:42:47 +0000