Incomplete implementation of libpci's (of pciutils) interface.

No pciutils code was harmed in its production - this code was written by
looking at flashrom's expectations, so there's no license pollution.

Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de>
Acked-by: Peter Stuge <peter@stuge.se>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5645 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

4 files changed, 324 insertions, 2 deletions

diff --git a/payloads/libpayload/Makefile b/payloads/libpayload/Makefile
index dd105431c..bb0061392 100644
--- a/payloads/libpayload/Makefile
+++ b/payloads/libpayload/Makefile
@@ -77,7 +77,7 @@ ARCHDIR-$(CONFIG_TARGET_POWERPC) := powerpc
 PLATFORM-y += arch/$(ARCHDIR-y)/Makefile.inc
 TARGETS-y :=
 
-BUILD-y := crypto/Makefile.inc libc/Makefile.inc drivers/Makefile.inc
+BUILD-y := crypto/Makefile.inc libc/Makefile.inc drivers/Makefile.inc libpci/Makefile.inc
 BUILD-$(CONFIG_TINYCURSES) += curses/Makefile.inc
 
 # The primary target needs to be here before we include the
@@ -145,7 +145,7 @@ prepare:
 	$(Q)mkdir -p $(obj)/util/kconfig/lxdialog
 	$(Q)mkdir -p $(obj)/crypto $(obj)/curses $(obj)/drivers/video
 	$(Q)mkdir -p $(obj)/drivers/usb
-	$(Q)mkdir -p $(obj)/arch/$(ARCHDIR-y) $(obj)/lib/$(ARCHDIR-y) $(obj)/libc
+	$(Q)mkdir -p $(obj)/arch/$(ARCHDIR-y) $(obj)/lib/$(ARCHDIR-y) $(obj)/libc $(obj)/libpci
 	$(Q)mkdir -p $(obj)/lib/$(ARCHDIR-y)
 	$(Q)mkdir -p $(obj)/include
 
diff --git a/payloads/libpayload/include/pci/pci.h b/payloads/libpayload/include/pci/pci.h
new file mode 100644
index 000000000..0a06604e5
--- /dev/null
+++ b/payloads/libpayload/include/pci/pci.h
@@ -0,0 +1,76 @@
+/*

+ * 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.

+ */

+

+#ifndef _PCI_PCI_H

+#define _PCI_PCI_H

+

+#include <pci.h>

+

+#define PCI_CLASS_DEVICE	REG_CLASS_DEV

+#define PCI_SUBSYSTEM_VENDOR_ID REG_SUBSYS_VENDOR_ID

+#define PCI_SUBSYSTEM_ID	REG_SUBSYS_ID

+

+struct pci_dev {

+	u16 domain;

+	u8 bus, dev, func;

+	u16 vendor_id, device_id;

+	struct pci_dev *next;

+};

+

+/*

+ * values to match devices against.

+ * "-1" means "don't care", everything else requires an exact match

+ */

+struct pci_filter {

+	int domain, bus, dev, func;

+	int vendor, device;

+	struct pci_dev *devices;

+};

+

+struct pci_access {

+	struct pci_dev *devices;

+};

+

+u8 pci_read_byte(struct pci_dev *dev, int pos);

+u16 pci_read_word(struct pci_dev *dev, int pos);

+u32 pci_read_long(struct pci_dev *dev, int pos);

+

+int pci_write_byte(struct pci_dev *dev, int pos, u8 data);

+int pci_write_word(struct pci_dev *dev, int pos, u16 data);

+int pci_write_long(struct pci_dev *dev, int pos, u32 data);

+

+struct pci_access *pci_alloc(void);

+void pci_init(struct pci_access*);

+char *pci_filter_parse_slot(struct pci_filter*, const char*);

+int pci_filter_match(struct pci_filter*, struct pci_dev*);

+void pci_filter_init(struct pci_access*, struct pci_filter*);

+void pci_scan_bus(struct pci_access*);

+struct pci_dev *pci_get_dev(struct pci_access*, u16, u8, u8, u8);

+

+#endif

diff --git a/payloads/libpayload/libpci/Makefile.inc b/payloads/libpayload/libpci/Makefile.inc
new file mode 100644
index 000000000..5c3c3ea95
--- /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 000000000..09b51e513
--- /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;
+}
+