Thread (29 messages) read the whole thread 29 messages, 4 authors, 2016-05-11
STALE3735d REVIEWED: 3 (3M)

Revision v9 of 4 in this series; 1 review trailer (1 from subsystem maintainers).

Revisions (4)
  1. v7 [diff vs current]
  2. v8 [diff vs current]
  3. v9 current
  4. v10 [diff vs current]

[PATCH v9 01/22] PCI: Add pcibios_setup_bridge()

From: Gavin Shan <hidden>
Date: 2016-05-03 13:22:32
Also in: linux-devicetree, linux-pci
Subsystem: pci subsystem, the rest · Maintainers: Bjorn Helgaas, Linus Torvalds

Currently, PowerPC PowerNV platform utilizes ppc_md.pcibios_fixup(),
which is called for once after PCI probing and resource assignment
are completed, to allocate platform required resources for PCI devices:
PE#, IO and MMIO mapping, DMA address translation (TCE) table etc.
Obviously, it's not hotplug friendly.

This adds weak function pcibios_setup_bridge(), which is called by
pci_setup_bridge(). PowerPC PowerNV platform will reuse the function
to assign above platform required resources to newly plugged PCI devices
during PCI hotplug in subsequent patches.

Signed-off-by: Gavin Shan <redacted>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/setup-bus.c | 5 +++++
 include/linux/pci.h     | 1 +
 2 files changed, 6 insertions(+)
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 55641a3..d678c46 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -695,11 +695,16 @@ static void __pci_setup_bridge(struct pci_bus *bus, unsigned long type)
 	pci_write_config_word(bridge, PCI_BRIDGE_CONTROL, bus->bridge_ctl);
 }
 
+void __weak pcibios_setup_bridge(struct pci_bus *bus, unsigned long type)
+{
+}
+
 void pci_setup_bridge(struct pci_bus *bus)
 {
 	unsigned long type = IORESOURCE_IO | IORESOURCE_MEM |
 				  IORESOURCE_PREFETCH;
 
+	pcibios_setup_bridge(bus, type);
 	__pci_setup_bridge(bus, type);
 }
 
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 004b813..a17f0e8 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -856,6 +856,7 @@ void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
 void pci_stop_root_bus(struct pci_bus *bus);
 void pci_remove_root_bus(struct pci_bus *bus);
 void pci_setup_cardbus(struct pci_bus *bus);
+void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type);
 void pci_sort_breadthfirst(void);
 #define dev_is_pci(d) ((d)->bus == &pci_bus_type)
 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
-- 
2.1.0
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help