soc/intel: Fix regression with hidden PCI devices
Fix regression with commit
903b40a soc/intel: Replace uses of dev_find_slot()
Platforms where FSP hides PCI devices before enumeration
may halt with error message 'PCI: dev is NULL!'.
The workaround here is to print an error message revealing
the faulty source code function and revert to old behaviour
of dev_find_slot().
Change-Id: I5eab3e7f1993b686103eaa257aacda379dc259fa
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34285
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Maxim Polyakov <max.senia.poliak@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Christian Walter <christian.walter@9elements.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/device/device_const.c b/src/device/device_const.c
index c1b0b06..f2f0177 100644
--- a/src/device/device_const.c
+++ b/src/device/device_const.c
@@ -234,6 +234,18 @@
return pcidev_path_on_root(PCI_DEVFN(dev, fn));
}
+DEVTREE_CONST struct device *pcidev_path_on_root_debug(pci_devfn_t devfn, const char *func)
+{
+ DEVTREE_CONST struct device *dev = pcidev_path_on_root(devfn);
+ if (dev)
+ return dev;
+
+ printk(BIOS_ERR, "BUG: %s requests hidden 00:%02x.%u\n", func, devfn >> 3, devfn & 7);
+
+ /* FIXME: This can return wrong device. */
+ return dev_find_slot(0, devfn);
+}
+
/**
* Given an SMBus bus and a device number, find the device structure.
*
diff --git a/src/include/device/device.h b/src/include/device/device.h
index 676da65..d6f80ce 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -275,8 +275,6 @@
void tolm_test(void *gp, struct device *dev, struct resource *new);
u32 find_pci_tolm(struct bus *bus);
-DEVTREE_CONST struct device *dev_find_slot(unsigned int bus,
- unsigned int devfn);
DEVTREE_CONST struct device *dev_find_next_pci_device(
DEVTREE_CONST struct device *previous_dev);
DEVTREE_CONST struct device *dev_find_slot_on_smbus(unsigned int bus,
@@ -292,6 +290,10 @@
DEVTREE_CONST struct device *pcidev_on_root(uint8_t dev, uint8_t fn);
DEVTREE_CONST struct bus *pci_root_bus(void);
+/* To be deprecated, avoid using. */
+DEVTREE_CONST struct device *dev_find_slot(unsigned int bus, unsigned int devfn);
+DEVTREE_CONST struct device *pcidev_path_on_root_debug(pci_devfn_t devfn, const char *func);
+
void scan_smbus(struct device *bus);
void scan_generic_bus(struct device *bus);
void scan_static_bus(struct device *bus);
diff --git a/src/soc/intel/apollolake/include/soc/pci_devs.h b/src/soc/intel/apollolake/include/soc/pci_devs.h
index a334f63..c5eaf4c 100644
--- a/src/soc/intel/apollolake/include/soc/pci_devs.h
+++ b/src/soc/intel/apollolake/include/soc/pci_devs.h
@@ -22,8 +22,8 @@
#if !defined(__SIMPLE_DEVICE__)
#include <device/device.h>
-#define _SA_DEV(slot) pcidev_path_on_root(_SA_DEVFN(slot))
-#define _PCH_DEV(slot, func) pcidev_path_on_root(_PCH_DEVFN(slot, func))
+#define _SA_DEV(slot) pcidev_path_on_root_debug(_SA_DEVFN(slot), __func__)
+#define _PCH_DEV(slot, func) pcidev_path_on_root_debug(_PCH_DEVFN(slot, func), __func__)
#else
#define _SA_DEV(slot) PCI_DEV(0, SA_DEV_SLOT_ ## slot, 0)
#define _PCH_DEV(slot, func) PCI_DEV(0, PCH_DEV_SLOT_ ## slot, func)
diff --git a/src/soc/intel/broadwell/include/soc/pci_devs.h b/src/soc/intel/broadwell/include/soc/pci_devs.h
index 522e3eb..ae3e08f 100644
--- a/src/soc/intel/broadwell/include/soc/pci_devs.h
+++ b/src/soc/intel/broadwell/include/soc/pci_devs.h
@@ -25,8 +25,8 @@
#else
#include <device/device.h>
#include <device/pci_def.h>
-#define _SA_DEV(slot) pcidev_path_on_root(_SA_DEVFN(slot))
-#define _PCH_DEV(slot, func) pcidev_path_on_root(_PCH_DEVFN(slot, func))
+#define _SA_DEV(slot) pcidev_path_on_root_debug(_SA_DEVFN(slot), __func__)
+#define _PCH_DEV(slot, func) pcidev_path_on_root_debug(_PCH_DEVFN(slot, func), __func__)
#endif
/* System Agent Devices */
diff --git a/src/soc/intel/cannonlake/include/soc/pci_devs.h b/src/soc/intel/cannonlake/include/soc/pci_devs.h
index 1bc028f..33814b0 100644
--- a/src/soc/intel/cannonlake/include/soc/pci_devs.h
+++ b/src/soc/intel/cannonlake/include/soc/pci_devs.h
@@ -24,8 +24,8 @@
#if !defined(__SIMPLE_DEVICE__)
#include <device/device.h>
-#define _SA_DEV(slot) pcidev_path_on_root(_SA_DEVFN(slot))
-#define _PCH_DEV(slot, func) pcidev_path_on_root(_PCH_DEVFN(slot, func))
+#define _SA_DEV(slot) pcidev_path_on_root_debug(_SA_DEVFN(slot), __func__)
+#define _PCH_DEV(slot, func) pcidev_path_on_root_debug(_PCH_DEVFN(slot, func), __func__)
#else
#define _SA_DEV(slot) PCI_DEV(0, SA_DEV_SLOT_ ## slot, 0)
#define _PCH_DEV(slot, func) PCI_DEV(0, PCH_DEV_SLOT_ ## slot, func)
diff --git a/src/soc/intel/denverton_ns/include/soc/pci_devs.h b/src/soc/intel/denverton_ns/include/soc/pci_devs.h
index 303ba67..27f9e35 100644
--- a/src/soc/intel/denverton_ns/include/soc/pci_devs.h
+++ b/src/soc/intel/denverton_ns/include/soc/pci_devs.h
@@ -27,8 +27,8 @@
#if ENV_RAMSTAGE
#include <device/device.h>
#include <device/pci_def.h>
-#define _SA_DEV(slot) pcidev_path_on_root(_SA_DEVFN(slot))
-#define _PCH_DEV(slot, func) pcidev_path_on_root(_PCH_DEVFN(slot, func))
+#define _SA_DEV(slot) pcidev_path_on_root_debug(_SA_DEVFN(slot), __func__)
+#define _PCH_DEV(slot, func) pcidev_path_on_root_debug(_PCH_DEVFN(slot, func), __func__)
#else
#define _SA_DEV(slot) PCI_DEV(0, SA_DEV_SLOT_##slot, 0)
#define _PCH_DEV(slot, func) PCI_DEV(0, PCH_DEV_SLOT_##slot, func)
diff --git a/src/soc/intel/icelake/include/soc/pci_devs.h b/src/soc/intel/icelake/include/soc/pci_devs.h
index 1348f23b..0eddee2 100644
--- a/src/soc/intel/icelake/include/soc/pci_devs.h
+++ b/src/soc/intel/icelake/include/soc/pci_devs.h
@@ -23,8 +23,8 @@
#if !defined(__SIMPLE_DEVICE__)
#include <device/device.h>
-#define _SA_DEV(slot) pcidev_path_on_root(_SA_DEVFN(slot))
-#define _PCH_DEV(slot, func) pcidev_path_on_root(_PCH_DEVFN(slot, func))
+#define _SA_DEV(slot) pcidev_path_on_root_debug(_SA_DEVFN(slot), __func__)
+#define _PCH_DEV(slot, func) pcidev_path_on_root_debug(_PCH_DEVFN(slot, func), __func__)
#else
#define _SA_DEV(slot) PCI_DEV(0, SA_DEV_SLOT_ ## slot, 0)
#define _PCH_DEV(slot, func) PCI_DEV(0, PCH_DEV_SLOT_ ## slot, func)
diff --git a/src/soc/intel/skylake/include/soc/pci_devs.h b/src/soc/intel/skylake/include/soc/pci_devs.h
index 5acaaebc..0669ced 100644
--- a/src/soc/intel/skylake/include/soc/pci_devs.h
+++ b/src/soc/intel/skylake/include/soc/pci_devs.h
@@ -24,8 +24,8 @@
#if !defined(__SIMPLE_DEVICE__)
#include <device/device.h>
-#define _SA_DEV(slot) pcidev_path_on_root(_SA_DEVFN(slot))
-#define _PCH_DEV(slot, func) pcidev_path_on_root(_PCH_DEVFN(slot, func))
+#define _SA_DEV(slot) pcidev_path_on_root_debug(_SA_DEVFN(slot), __func__)
+#define _PCH_DEV(slot, func) pcidev_path_on_root_debug(_PCH_DEVFN(slot, func), __func__)
#else
#define _SA_DEV(slot) PCI_DEV(0, SA_DEV_SLOT_ ## slot, 0)
#define _PCH_DEV(slot, func) PCI_DEV(0, PCH_DEV_SLOT_ ## slot, func)
@@ -39,7 +39,7 @@
#define SA_DEV_SLOT_PEG 0x01
#define SA_DEVFN_PEG(func) PCI_DEVFN(SA_DEV_SLOT_PEG, func)
-#define SA_DEV_PEG(func) pcidev_path_on_root(SA_DEVFN_PEG(func))
+#define SA_DEV_PEG(func) pcidev_path_on_root_debug(SA_DEVFN_PEG(func), __func__)
#define SA_DEV_PEG0 SA_DEV_PEG(0)
#define SA_DEV_PEG1 SA_DEV_PEG(1)
#define SA_DEV_PEG2 SA_DEV_PEG(2)