diff mbox

[V8,8/9] arm64, pci, acpi: Provide ACPI-specific prerequisites for PCI bus enumeration.

Message ID 1464621262-26770-9-git-send-email-tn@semihalf.com (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

Tomasz Nowicki May 30, 2016, 3:14 p.m. UTC
ACPI requires to run acpi_pci_{add|remove}_bus while new PCI bus is created.
This allows to do some ACPI-specific additional configuration, like
PCI hotplug slot enumeration. In order to fulfill these requirements,
we implement arch-specific pcibios_{add|remove}_bus calls
and call acpi_pci_{add|remove}_bus from there.

Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
---
 arch/arm64/kernel/pci.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

Comments

Lorenzo Pieralisi June 2, 2016, 9:45 a.m. UTC | #1
On Mon, May 30, 2016 at 05:14:21PM +0200, Tomasz Nowicki wrote:
> ACPI requires to run acpi_pci_{add|remove}_bus while new PCI bus is created.
> This allows to do some ACPI-specific additional configuration, like
> PCI hotplug slot enumeration. In order to fulfill these requirements,
> we implement arch-specific pcibios_{add|remove}_bus calls
> and call acpi_pci_{add|remove}_bus from there.
> 
> Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
> ---
>  arch/arm64/kernel/pci.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)

Is there a reason why this has to be a standalone patch ?

It is pretty much useless without patch 9 or I have stared at
this series for too long.

Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

> diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
> index 336deef..3663be1 100644
> --- a/arch/arm64/kernel/pci.c
> +++ b/arch/arm64/kernel/pci.c
> @@ -17,6 +17,7 @@
>  #include <linux/mm.h>
>  #include <linux/of_pci.h>
>  #include <linux/of_platform.h>
> +#include <linux/pci-acpi.h>
>  #include <linux/slab.h>
>  
>  /*
> @@ -96,4 +97,15 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
>  	/* TODO: Should be revisited when implementing PCI on ACPI */
>  	return NULL;
>  }
> +
> +void pcibios_add_bus(struct pci_bus *bus)
> +{
> +	acpi_pci_add_bus(bus);
> +}
> +
> +void pcibios_remove_bus(struct pci_bus *bus)
> +{
> +	acpi_pci_remove_bus(bus);
> +}
> +
>  #endif
> -- 
> 1.9.1
> 
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Tomasz Nowicki June 2, 2016, 9:51 a.m. UTC | #2
On 02.06.2016 11:45, Lorenzo Pieralisi wrote:
> On Mon, May 30, 2016 at 05:14:21PM +0200, Tomasz Nowicki wrote:
>> ACPI requires to run acpi_pci_{add|remove}_bus while new PCI bus is created.
>> This allows to do some ACPI-specific additional configuration, like
>> PCI hotplug slot enumeration. In order to fulfill these requirements,
>> we implement arch-specific pcibios_{add|remove}_bus calls
>> and call acpi_pci_{add|remove}_bus from there.
>>
>> Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
>> ---
>>   arch/arm64/kernel/pci.c | 12 ++++++++++++
>>   1 file changed, 12 insertions(+)
>
> Is there a reason why this has to be a standalone patch ?

No there is no good reason behind this I will squash it with 9.

>
> It is pretty much useless without patch 9 or I have stared at
> this series for too long.

Yes, it is useless w/o patch 9.

>
> Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
>

Thanks,
Tomasz
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diff mbox

Patch

diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
index 336deef..3663be1 100644
--- a/arch/arm64/kernel/pci.c
+++ b/arch/arm64/kernel/pci.c
@@ -17,6 +17,7 @@ 
 #include <linux/mm.h>
 #include <linux/of_pci.h>
 #include <linux/of_platform.h>
+#include <linux/pci-acpi.h>
 #include <linux/slab.h>
 
 /*
@@ -96,4 +97,15 @@  struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 	/* TODO: Should be revisited when implementing PCI on ACPI */
 	return NULL;
 }
+
+void pcibios_add_bus(struct pci_bus *bus)
+{
+	acpi_pci_add_bus(bus);
+}
+
+void pcibios_remove_bus(struct pci_bus *bus)
+{
+	acpi_pci_remove_bus(bus);
+}
+
 #endif