Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1256941

[PATCH V1 08/11] pci, acpi, ecam: Add flag to indicate whether ECAM region was hot added or not.

Show all headers | View raw

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>
---
 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 8a5eef7..da35b4c 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

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH V1 00/11] MMCONFIG refactoring and ARM64 PCI hostbridge init based on ACPI Tomasz Nowicki <tn@semihalf.com> - 2015-10-27 17:40 +0100
  [PATCH V1 09/11] x86, pci: Use previously added ECAM hot_added flag to remove ECAM regions. Tomasz Nowicki <tn@semihalf.com> - 2015-10-27 17:50 +0100
  [PATCH V1 06/11] pci, acpi, mcfg: Provide default RAW ACPI PCI config space accessors. Tomasz Nowicki <tn@semihalf.com> - 2015-10-27 17:50 +0100
  [PATCH V1 02/11] x86, pci, acpi: Move arch-agnostic MMCONFIG (aka ECAM) and ACPI code out of arch/x86/ directory Tomasz Nowicki <tn@semihalf.com> - 2015-10-27 17:50 +0100
  [PATCH V1 03/11] pci, acpi, mcfg: Provide generic implementation of MCFG code initialization. Tomasz Nowicki <tn@semihalf.com> - 2015-10-27 17:50 +0100
  [PATCH V1 11/11] arm64, pci, acpi: Support for ACPI based PCI hostbridge init Tomasz Nowicki <tn@semihalf.com> - 2015-10-27 17:50 +0100
    Re: [PATCH V1 11/11] arm64, pci, acpi: Support for ACPI based PCI  hostbridge init Liviu.Dudau@arm.com - 2015-10-28 12:50 +0100
      Re: [PATCH V1 11/11] arm64, pci, acpi: Support for ACPI based PCI  hostbridge init Tomasz Nowicki <tn@semihalf.com> - 2015-10-28 14:50 +0100
        Re: [PATCH V1 11/11] arm64, pci, acpi: Support for ACPI based PCI  hostbridge init Liviu.Dudau@arm.com - 2015-10-28 15:00 +0100
    Re: [PATCH V1 11/11] arm64, pci, acpi: Support for ACPI based PCI  hostbridge init Sinan Kaya <okaya@codeaurora.org> - 2015-10-28 19:50 +0100
  [PATCH V1 05/11] x86, pci, ecam: mmconfig_64.c becomes default implementation for ECAM driver. Tomasz Nowicki <tn@semihalf.com> - 2015-10-27 17:50 +0100
  [PATCH V1 08/11] pci, acpi, ecam: Add flag to indicate whether ECAM region was hot added or not. Tomasz Nowicki <tn@semihalf.com> - 2015-10-27 17:50 +0100
  [PATCH V1 01/11] x86, pci: Reorder logic of pci_mmconfig_insert() function Tomasz Nowicki <tn@semihalf.com> - 2015-10-27 17:50 +0100
  [PATCH V1 04/11] x86, pci: mmconfig_{32,64}.c code refactoring - remove code duplication. Tomasz Nowicki <tn@semihalf.com> - 2015-10-27 17:50 +0100
  Re: [PATCH V1 00/11] MMCONFIG refactoring and ARM64 PCI hostbridge  init based on ACPI Jon Masters <jcm@redhat.com> - 2015-10-30 05:10 +0100
    Re: [PATCH V1 00/11] MMCONFIG refactoring and ARM64 PCI hostbridge  init based on ACPI Hanjun Guo <guohanjun@huawei.com> - 2015-10-30 06:00 +0100
    Re: [PATCH V1 00/11] MMCONFIG refactoring and ARM64 PCI hostbridge  init based on ACPI Tomasz Nowicki <tn@semihalf.com> - 2015-10-30 09:30 +0100

csiph-web