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pci.h: add pci_map_bar_region support

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Signed-off-by: wangyongrong <wangyongrong@xiaomi.com>
This commit is contained in:
wangyongrong 2024-04-19 10:11:38 +08:00 committed by Xiang Xiao
parent e86be98d14
commit 3b09de844f
2 changed files with 59 additions and 10 deletions
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46
drivers/pci/pci.c
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@ -1560,6 +1560,41 @@ int pci_select_bars(FAR struct pci_device_s *dev, unsigned int flags)
return bars;
}
/****************************************************************************
* Name: pci_map_bar_region
*
* Description:
* Create a virtual mapping for a PCI BAR REGION.
*
* Using this function you will get an address to your device BAR region.
* These functions hide the details if this is a MMIO or PIO address
* space and will just do what you expect from them in the correct way.
*
* Input Parameters:
* dev - PCI device that owns the BAR
* bar - BAR number
* offset - BAR region offset
* length - BAR region length
*
* Returned Value:
* IO address or zero if failed
****************************************************************************/
FAR void *pci_map_bar_region(FAR struct pci_device_s *dev, int bar,
uintptr_t offset, size_t length)
{
FAR struct pci_bus_s *bus = dev->bus;
uintptr_t start = pci_resource_start(dev, bar) + offset;
uintptr_t end = start + length;
if (bus->ctrl->ops->map)
{
start = bus->ctrl->ops->map(bus, start, end);
}
return (FAR void *)start;
}
/****************************************************************************
* Name: pci_map_bar
*
@ -1581,16 +1616,7 @@ int pci_select_bars(FAR struct pci_device_s *dev, unsigned int flags)
FAR void *pci_map_bar(FAR struct pci_device_s *dev, int bar)
{
FAR struct pci_bus_s *bus = dev->bus;
uintptr_t start = pci_resource_start(dev, bar);
uintptr_t end = pci_resource_end(dev, bar);
if (bus->ctrl->ops->map)
{
start = bus->ctrl->ops->map(bus, start, end);
}
return (FAR void *)start;
return pci_map_bar_region(dev, bar, 0, pci_resource_len(dev, bar));
}
/****************************************************************************

23
include/nuttx/pci/pci.h
View file

@ -615,6 +615,29 @@ int pci_disable_device(FAR struct pci_device_s *dev);
int pci_select_bars(FAR struct pci_device_s *dev, unsigned int flags);
/****************************************************************************
* Name: pci_map_bar_region
*
* Description:
* Create a virtual mapping for a PCI BAR REGION.
*
* Using this function you will get an address to your device BAR region.
* These functions hide the details if this is a MMIO or PIO address
* space and will just do what you expect from them in the correct way.
*
* Input Parameters:
* dev - PCI device that owns the BAR
* bar - BAR number
* offset - BAR region offset
* length - BAR region length
*
* Returned Value:
* IO address or zero if failed
****************************************************************************/
FAR void *pci_map_bar_region(FAR struct pci_device_s *dev, int bar,
uintptr_t offset, size_t length);
/****************************************************************************
* Name: pci_map_bar
*