[U-Boot] [PATCH v4 7/8] dm: pci: Add a function to find the regions for a PCI bus

Simon Glass
2015-11-14T04:19:40Z

This function looks up the controller and returns a pointer to each region
type.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
---

Changes in v4: None
Changes in v3: None
Changes in v2: None

drivers/pci/pci-uclass.c | 30 ++++++++++++++++++++++++++++++
include/pci.h | 12 ++++++++++++
2 files changed, 42 insertions(+)

diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index f3f5f00..5fe3072 100644
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -974,6 +974,36 @@ ulong pci_conv_size_to_32(ulong old, ulong value, uint offset,
return value;
}

+int pci_get_regions(struct udevice *dev, struct pci_region **iop,
+ struct pci_region **memp, struct pci_region **prefp)
+{
+ struct udevice *bus = pci_get_controller(dev);
+ struct pci_controller *hose = dev_get_uclass_priv(bus);
+ int i;
+
+ *iop = NULL;
+ *memp = NULL;
+ *prefp = NULL;
+ for (i = 0; i < hose->region_count; i++) {
+ switch (hose->regions[i].flags) {
+ case PCI_REGION_IO:
+ if (!*iop || (*iop)->size < hose->regions[i].size)
+ *iop = hose->regions + i;
+ break;
+ case PCI_REGION_MEM:
+ if (!*memp || (*memp)->size < hose->regions[i].size)
+ *memp = hose->regions + i;
+ break;
+ case (PCI_REGION_MEM | PCI_REGION_PREFETCH):
+ if (!*prefp || (*prefp)->size < hose->regions[i].size)
+ *prefp = hose->regions + i;
+ break;
+ }
+ }
+
+ return (*iop != NULL) + (*memp != NULL) + (*prefp != NULL);
+}
+
UCLASS_DRIVER(pci) = {
.id = UCLASS_PCI,
.name = "pci",
diff --git a/include/pci.h b/include/pci.h
index f3dda70..9c19482 100644
--- a/include/pci.h
+++ b/include/pci.h
@@ -1131,6 +1131,18 @@ ulong pci_conv_size_to_32(ulong old, ulong value, uint offset,
struct udevice *pci_get_controller(struct udevice *dev);

/**
+ * pci_get_regions() - obtain pointers to all the region types
+ *
+ * @dev: Device to check
+ * @iop: Returns a pointer to the I/O region, or NULL if none
+ * @memp: Returns a pointer to the memory region, or NULL if none
+ * @prefp: Returns a pointer to the pre-fetch region, or NULL if none
+ * @return the number of non-NULL regions returned, normally 3
+ */
+int pci_get_regions(struct udevice *dev, struct pci_region **iop,
+ struct pci_region **memp, struct pci_region **prefp);
+
+/**
* struct dm_pci_emul_ops - PCI device emulator operations
*/
struct dm_pci_emul_ops {
--
2.6.0.rc2.230.g3dd15c0