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dm: pci: Use the correct hose when configuring devices

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Only the PCI controller has access to the PCI region information. Make sure
to use the controller (rather than any attached bridges) when configuring
devices.

This corrects a failure to scan and configure devices when driver model is
enabled for PCI.

Also add a comment to explain the problem.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2015-06-07 08:50:40 -06:00
parent cdb6babec6
commit aec241dfb4
3 changed files with 21 additions and 1 deletions
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6
drivers/pci/pci-uclass.c
View file

@ -296,6 +296,7 @@ int pci_auto_config_devices(struct udevice *bus)
!ret && dev;
ret = device_find_next_child(&dev)) {
struct pci_child_platdata *pplat;
struct pci_controller *ctlr_hose;
pplat = dev_get_parent_platdata(dev);
unsigned int max_bus;
@ -303,7 +304,10 @@ int pci_auto_config_devices(struct udevice *bus)
bdf = PCI_ADD_BUS(bus->seq, pplat->devfn);
debug("%s: device %s\n", __func__, dev->name);
max_bus = pciauto_config_device(hose, bdf);
/* The root controller has the region information */
ctlr_hose = hose->ctlr->uclass_priv;
max_bus = pciauto_config_device(ctlr_hose, bdf);
sub_bus = max(sub_bus, max_bus);
}
debug("%s: done\n", __func__);

6
drivers/pci/pci_common.c
View file

@ -11,6 +11,7 @@
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <pci.h>
#include <asm/io.h>
@ -221,6 +222,11 @@ phys_addr_t pci_hose_bus_to_phys(struct pci_controller *hose,
return phys_addr;
}
#ifdef CONFIG_DM_PCI
/* The root controller has the region information */
hose = hose->ctlr->uclass_priv;
#endif
/*
* if PCI_REGION_MEM is set we do a two pass search with preference
* on matches that don't have PCI_REGION_SYS_MEMORY set

10
include/pci.h
View file

@ -513,6 +513,16 @@ struct pci_controller {
int indirect_type;
/*
* TODO(sjg@chromium.org): With driver model we use struct
* pci_controller for both the controller and any bridge devices
* attached to it. But there is only one region list and it is in the
* top-level controller.
*
* This could be changed so that struct pci_controller is only used
* for PCI controllers and a separate UCLASS (or perhaps
* UCLASS_PCI_GENERIC) is used for bridges.
*/
struct pci_region regions[MAX_PCI_REGIONS];
int region_count;