Messages in this thread Patch in this message | | | From | Tomasz Nowicki <> | Subject | [PATCH V4 09/23] pci, acpi, ecam: Add flag to indicate whether ECAM region was hot added or not. | Date | Thu, 4 Feb 2016 18:28:47 +0100 |
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There are two ways we can get ECAM (aka MCFG) regions using ACPI, from MCFG static table and from _CBA method. We cannot remove static regions, however regions coming from _CBA should be removed while removing bridge device.
In the light of above we need flag to mark hot added ECAM entries so that user should use pci_mmconfig_inject while adding regions from _CBA method.
Signed-off-by: Tomasz Nowicki <tn@semihalf.com> Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Tested-by: Jeremy Linton <jeremy.linton@arm.com> Tested-by: Duc Dang <dhdang@apm.com> Tested-by: Dongdong Liu <liudongdong3@huawei.com> Tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Graeme Gregory <graeme.gregory@linaro.org> Tested-by: Sinan Kaya <okaya@codeaurora.org> --- drivers/pci/ecam.c | 2 ++ include/linux/ecam.h | 1 + 2 files changed, 3 insertions(+)
diff --git a/drivers/pci/ecam.c b/drivers/pci/ecam.c index 7bc75af..fea5700 100644 --- a/drivers/pci/ecam.c +++ b/drivers/pci/ecam.c @@ -131,6 +131,7 @@ struct pci_mmcfg_region *pci_mmconfig_alloc(int segment, int start, new->segment = segment; new->start_bus = start; new->end_bus = end; + new->hot_added = false; res = &new->res; res->start = addr + PCI_MMCFG_BUS_OFFSET(start); @@ -221,6 +222,7 @@ int pci_mmconfig_inject(struct pci_mmcfg_region *cfg) err = -ENOMEM; goto out; } else { + cfg->hot_added = true; list_add_sorted(cfg); pr_info("MMCONFIG at %pR (base %#lx)\n", &cfg->res, (unsigned long)cfg->address); diff --git a/include/linux/ecam.h b/include/linux/ecam.h index 813acd1..e0f322e 100644 --- a/include/linux/ecam.h +++ b/include/linux/ecam.h @@ -17,6 +17,7 @@ struct pci_mmcfg_region { u8 start_bus; u8 end_bus; char name[PCI_MMCFG_RESOURCE_NAME_LEN]; + bool hot_added; }; struct pci_mmcfg_region *pci_mmconfig_lookup(int segment, int bus); -- 1.9.1
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