From bbaff68bf4a404bee5f5e20e7b1e30301b26304a Mon Sep 17 00:00:00 2001 From: Philipp Stanner Date: Thu, 13 Jun 2024 13:50:16 +0200 Subject: PCI: Add managed partial-BAR request and map infrastructure MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The pcim_iomap_devres table tracks entire-BAR mappings, so we can't use it to build a managed version of pci_iomap_range(), which maps partial BARs. Add struct pcim_addr_devres, which can track request and mapping of both entire BARs and partial BARs. Add the following internal devres functions based on struct pcim_addr_devres: pcim_iomap_region() # request & map entire BAR pcim_iounmap_region() # unmap & release entire BAR pcim_request_region() # request entire BAR pcim_release_region() # release entire BAR pcim_request_all_regions() # request all entire BARs pcim_release_all_regions() # release all entire BARs Rework the following public interfaces using the new infrastructure listed above: pcim_iomap() # map partial BAR pcim_iounmap() # unmap partial BAR pcim_iomap_regions() # request & map specified BARs pcim_iomap_regions_request_all() # request all BARs, map specified BARs pcim_iounmap_regions() # unmap & release specified BARs Link: https://lore.kernel.org/r/20240613115032.29098-4-pstanner@redhat.com Signed-off-by: Philipp Stanner Signed-off-by: Krzysztof Wilczyński [bhelgaas: commit log] Signed-off-by: Bjorn Helgaas --- drivers/pci/pci.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/pci/pci.h') diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index fd44565c4756..c09487f5550c 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -826,6 +826,11 @@ struct pci_devres { unsigned int orig_intx:1; unsigned int restore_intx:1; unsigned int mwi:1; + + /* + * TODO: remove the region_mask once everyone calling + * pcim_enable_device() + pci_*region*() is ported to pcim_ functions. + */ u32 region_mask; }; -- cgit v1.2.3