[PATCH 02/18] powerpc/{powernv,pseries}: Move PHB discovery
Make powernv and pseries use ppc_mc.discover_phbs. These two platforms need
to be done together because they both depends on pci_dn's being created
from the DT. The pci_dn contains a pointer to the relevant pci_controller
so they need to be created after the pci_controller structures are
available, but before and before PCI devices are scanned. Currently this
ordering is provided by initcalls and the sequence is:
1. PHBs are discovered (setup_arch) (early boot, pre-initcalls)
2. pci_dn are created from the unflattended DT (core initcall)
3. PHBs are scanned pcibios_init() (subsys initcall)
The new ppc_md.discover_phbs() function is also a core_initcall so we can't
guarantee ordering between the creations of pci_controllers and the
creation of pci_dn's which require a pci_controller. We could use the
postcore, or core_sync initcall levels, but it's cleaner to just move the
pci_dn setup into the per-PHB inits which occur inside of .discover_phb()
for these platforms. This brings the boot-time path in line with the PHB
hotplug path that is used for pseries DLPAR operations too.
Signed-off-by: Oliver O'Halloran
---
arch/powerpc/kernel/pci_dn.c | 22 --
arch/powerpc/platforms/powernv/pci-ioda.c | 3 +++
arch/powerpc/platforms/powernv/setup.c| 4 +---
arch/powerpc/platforms/pseries/setup.c| 7 +--
4 files changed, 9 insertions(+), 27 deletions(-)
diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index 54e240597fd9..61571ae23953 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -481,28 +481,6 @@ void pci_devs_phb_init_dynamic(struct pci_controller *phb)
pci_traverse_device_nodes(dn, add_pdn, phb);
}
-/**
- * pci_devs_phb_init - Initialize phbs and pci devs under them.
- *
- * This routine walks over all phb's (pci-host bridges) on the
- * system, and sets up assorted pci-related structures
- * (including pci info in the device node structs) for each
- * pci device found underneath. This routine runs once,
- * early in the boot sequence.
- */
-static int __init pci_devs_phb_init(void)
-{
- struct pci_controller *phb, *tmp;
-
- /* This must be done first so the device nodes have valid pci info! */
- list_for_each_entry_safe(phb, tmp, _list, list_node)
- pci_devs_phb_init_dynamic(phb);
-
- return 0;
-}
-
-core_initcall(pci_devs_phb_init);
-
static void pci_dev_pdn_setup(struct pci_dev *pdev)
{
struct pci_dn *pdn;
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c
b/arch/powerpc/platforms/powernv/pci-ioda.c
index 2b4ceb5e6ce4..d6815f03fee3 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -3176,6 +3176,9 @@ static void __init pnv_pci_init_ioda_phb(struct
device_node *np,
/* Remove M64 resource if we can't configure it successfully */
if (!phb->init_m64 || phb->init_m64(phb))
hose->mem_resources[1].flags = 0;
+
+ /* create pci_dn's for DT nodes under this PHB */
+ pci_devs_phb_init_dynamic(hose);
}
void __init pnv_pci_init_ioda2_phb(struct device_node *np)
diff --git a/arch/powerpc/platforms/powernv/setup.c
b/arch/powerpc/platforms/powernv/setup.c
index 9acaa0f131b9..92f5fa827909 100644
--- a/arch/powerpc/platforms/powernv/setup.c
+++ b/arch/powerpc/platforms/powernv/setup.c
@@ -162,9 +162,6 @@ static void __init pnv_setup_arch(void)
/* Initialize SMP */
pnv_smp_init();
- /* Setup PCI */
- pnv_pci_init();
-
/* Setup RTC and NVRAM callbacks */
if (firmware_has_feature(FW_FEATURE_OPAL))
opal_nvram_init();
@@ -524,6 +521,7 @@ define_machine(powernv) {
.init_IRQ = pnv_init_IRQ,
.show_cpuinfo = pnv_show_cpuinfo,
.get_proc_freq = pnv_get_proc_freq,
+ .discover_phbs = pnv_pci_init,
.progress = pnv_progress,
.machine_shutdown = pnv_shutdown,
.power_save = NULL,
diff --git a/arch/powerpc/platforms/pseries/setup.c
b/arch/powerpc/platforms/pseries/setup.c
index 633c45ec406d..e88b30d4b6cd 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -463,7 +463,7 @@ void pseries_little_endian_exceptions(void)
}
#endif
-static void __init find_and_init_phbs(void)
+static void __init pSeries_discover_phbs(void)
{
struct device_node *node;
struct pci_controller *phb;
@@ -481,6 +481,9 @@ static void __init find_and_init_phbs(void)
pci_process_bridge_OF_ranges(phb, node, 0);
isa_bridge_find_early(phb);
phb->controller_ops = pseries_pci_controller_ops;
+
+ /* create pci_dn's for DT nodes under this PHB */
+ pci_devs_phb_init_dynamic(phb);
}
of_node_put(root);
@@ -777,7 +780,6 @@ static void __init
[RFC PATCH 02/18] powerpc/{powernv,pseries}: Move PHB discovery
Make powernv and pseries use ppc_mc.discover_phbs. These two platforms need
to be done together because they both depends on pci_dn's being created
from the DT. The pci_dn contains a pointer to the relevant pci_controller
so they need to be created after the pci_controller structures are
available, but before and before PCI devices are scanned. Currently this
ordering is provided by initcalls and the sequence is:
1. PHBs are discovered (setup_arch) (early boot, pre-initcalls)
2. pci_dn are created from the unflattended DT (core initcall)
3. PHBs are scanned pcibios_init() (subsys initcall)
The new ppc_md.discover_phbs() function is also a core_initcall so we can't
guarantee ordering between the creations of pci_controllers and the
creation of pci_dn's which require a pci_controller. We could use the
postcore, or core_sync initcall levels, but it's cleaner to just move the
pci_dn setup into the per-PHB inits which occur inside of .discover_phb()
for these platforms. This brings the boot-time path in line with the PHB
hotplug path that is used for pseries DLPAR operations too.
Signed-off-by: Oliver O'Halloran
---
arch/powerpc/kernel/pci_dn.c | 22 --
arch/powerpc/platforms/powernv/pci-ioda.c | 3 +++
arch/powerpc/platforms/powernv/setup.c| 4 +---
arch/powerpc/platforms/pseries/setup.c| 7 +--
4 files changed, 9 insertions(+), 27 deletions(-)
diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index 54e240597fd9..61571ae23953 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -481,28 +481,6 @@ void pci_devs_phb_init_dynamic(struct pci_controller *phb)
pci_traverse_device_nodes(dn, add_pdn, phb);
}
-/**
- * pci_devs_phb_init - Initialize phbs and pci devs under them.
- *
- * This routine walks over all phb's (pci-host bridges) on the
- * system, and sets up assorted pci-related structures
- * (including pci info in the device node structs) for each
- * pci device found underneath. This routine runs once,
- * early in the boot sequence.
- */
-static int __init pci_devs_phb_init(void)
-{
- struct pci_controller *phb, *tmp;
-
- /* This must be done first so the device nodes have valid pci info! */
- list_for_each_entry_safe(phb, tmp, _list, list_node)
- pci_devs_phb_init_dynamic(phb);
-
- return 0;
-}
-
-core_initcall(pci_devs_phb_init);
-
static void pci_dev_pdn_setup(struct pci_dev *pdev)
{
struct pci_dn *pdn;
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c
b/arch/powerpc/platforms/powernv/pci-ioda.c
index 023a4f987bb2..987654a08e2e 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -3184,6 +3184,9 @@ static void __init pnv_pci_init_ioda_phb(struct
device_node *np,
/* Remove M64 resource if we can't configure it successfully */
if (!phb->init_m64 || phb->init_m64(phb))
hose->mem_resources[1].flags = 0;
+
+ /* create pci_dn's for DT nodes under this PHB */
+ pci_devs_phb_init_dynamic(hose);
}
void __init pnv_pci_init_ioda2_phb(struct device_node *np)
diff --git a/arch/powerpc/platforms/powernv/setup.c
b/arch/powerpc/platforms/powernv/setup.c
index 7fcb88623081..a4d6d41b1155 100644
--- a/arch/powerpc/platforms/powernv/setup.c
+++ b/arch/powerpc/platforms/powernv/setup.c
@@ -140,9 +140,6 @@ static void __init pnv_setup_arch(void)
/* Initialize SMP */
pnv_smp_init();
- /* Setup PCI */
- pnv_pci_init();
-
/* Setup RTC and NVRAM callbacks */
if (firmware_has_feature(FW_FEATURE_OPAL))
opal_nvram_init();
@@ -500,6 +497,7 @@ define_machine(powernv) {
.init_IRQ = pnv_init_IRQ,
.show_cpuinfo = pnv_show_cpuinfo,
.get_proc_freq = pnv_get_proc_freq,
+ .discover_phbs = pnv_pci_init,
.progress = pnv_progress,
.machine_shutdown = pnv_shutdown,
.power_save = NULL,
diff --git a/arch/powerpc/platforms/pseries/setup.c
b/arch/powerpc/platforms/pseries/setup.c
index 2f4ee0a90284..d0bf487fadf5 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -463,7 +463,7 @@ void pseries_little_endian_exceptions(void)
}
#endif
-static void __init find_and_init_phbs(void)
+static void __init pSeries_discover_phbs(void)
{
struct device_node *node;
struct pci_controller *phb;
@@ -481,6 +481,9 @@ static void __init find_and_init_phbs(void)
pci_process_bridge_OF_ranges(phb, node, 0);
isa_bridge_find_early(phb);
phb->controller_ops = pseries_pci_controller_ops;
+
+ /* create pci_dn's for DT nodes under this PHB */
+ pci_devs_phb_init_dynamic(phb);
}
of_node_put(root);
@@ -771,7 +774,6 @@ static void __init
