Re: [PATCH V2 2/2] PCI: generic: Add msi_parent DT binding

2014-11-12 Thread Suravee Suthikulpanit

On 11/12/14 13:56, Srikanth Thokala wrote:

@@ -122,9 +123,19 @@ static int gen_pci_config_write(struct pci_bus *bus, 
unsigned int devfn,
> return PCIBIOS_SUCCESSFUL;
>  }
>
>+static int gen_pci_set_msi_parent(struct pci_bus *bus)
>+{
>+   struct gen_pci *pci = bus_to_gen_pci(bus);
>+
>+   bus->msi = pci->mchip;
>+
>+   return PCIBIOS_SUCCESSFUL;
>+}
>+
>  static struct pci_ops gen_pci_ops = {
> .read   = gen_pci_config_read,
> .write  = gen_pci_config_write,
>+   .set_msi_parent = gen_pci_set_msi_parent,

We assign the msi chip through add_bus() call, do we still need this?


Certain architecture (i.e arm64) doesn't implement struct hw_pci. 
Therefore, there is no add_bus().  However, this new API should allow 
non-arch dependent implementation.


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


Re: [PATCH V2 2/2] PCI: generic: Add msi_parent DT binding

2014-11-12 Thread Suravee Suthikulpanit



On 11/12/14 14:09, Srikanth Thokala wrote:

@@ -122,9 +123,19 @@ static int gen_pci_config_write(struct pci_bus *bus, 
unsigned int devfn,
>> return PCIBIOS_SUCCESSFUL;
>>  }
>>
>>+static int gen_pci_set_msi_parent(struct pci_bus *bus)
>>+{
>>+   struct gen_pci *pci = bus_to_gen_pci(bus);
>>+
>>+   bus->msi = pci->mchip;
>>+
>>+   return PCIBIOS_SUCCESSFUL;
>>+}
>>+
>>  static struct pci_ops gen_pci_ops = {
>> .read   = gen_pci_config_read,
>> .write  = gen_pci_config_write,
>>+   .set_msi_parent = gen_pci_set_msi_parent,

>
>We assign the msi chip through add_bus() call, do we still need this?
>

There are series of patches from Yijing Wang around this.  You may have
to go through them.

Srikanth



Hm.. I was not aware of this patch. Thanks for the pointer. I'll check 
them out.


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


Re: [PATCH V2 2/2] PCI: generic: Add msi_parent DT binding

2014-11-12 Thread Suravee Suthikulpanit



On 11/12/14 14:09, Srikanth Thokala wrote:

@@ -122,9 +123,19 @@ static int gen_pci_config_write(struct pci_bus *bus, 
unsigned int devfn,
 return PCIBIOS_SUCCESSFUL;
  }

+static int gen_pci_set_msi_parent(struct pci_bus *bus)
+{
+   struct gen_pci *pci = bus_to_gen_pci(bus);
+
+   bus-msi = pci-mchip;
+
+   return PCIBIOS_SUCCESSFUL;
+}
+
  static struct pci_ops gen_pci_ops = {
 .read   = gen_pci_config_read,
 .write  = gen_pci_config_write,
+   .set_msi_parent = gen_pci_set_msi_parent,


We assign the msi chip through add_bus() call, do we still need this?


There are series of patches from Yijing Wang around this.  You may have
to go through them.

Srikanth



Hm.. I was not aware of this patch. Thanks for the pointer. I'll check 
them out.


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


Re: [PATCH V2 2/2] PCI: generic: Add msi_parent DT binding

2014-11-12 Thread Suravee Suthikulpanit

On 11/12/14 13:56, Srikanth Thokala wrote:

@@ -122,9 +123,19 @@ static int gen_pci_config_write(struct pci_bus *bus, 
unsigned int devfn,
 return PCIBIOS_SUCCESSFUL;
  }

+static int gen_pci_set_msi_parent(struct pci_bus *bus)
+{
+   struct gen_pci *pci = bus_to_gen_pci(bus);
+
+   bus-msi = pci-mchip;
+
+   return PCIBIOS_SUCCESSFUL;
+}
+
  static struct pci_ops gen_pci_ops = {
 .read   = gen_pci_config_read,
 .write  = gen_pci_config_write,
+   .set_msi_parent = gen_pci_set_msi_parent,

We assign the msi chip through add_bus() call, do we still need this?


Certain architecture (i.e arm64) doesn't implement struct hw_pci. 
Therefore, there is no add_bus().  However, this new API should allow 
non-arch dependent implementation.


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


Re: [PATCH V2 2/2] PCI: generic: Add msi_parent DT binding

2014-11-11 Thread Srikanth Thokala
Hi,

On Wed, Nov 12, 2014 at 12:26 PM, Srikanth Thokala
 wrote:
> Hi,
>
> On Wed, Nov 12, 2014 at 12:47 AM,   wrote:
>> From: Suravee Suthikulpanit 
>>
>> This patch introduces a new DT binding, msi-parent, which can
>> be used to specify MSI-parent phandle for a particular PCI
>> generic host controller.
>>
>> Also, it implements and registers set_msi_parent callback.
>>
>> Cc: Bjorn Helgass 
>> Cc: Liviu Dudau 
>> Cc: Will Deacon 
>> Cc: Lorenzo Pieralisi 
>> Signed-off-by: Suravee Suthikulpanit 
>> ---
>>  Documentation/devicetree/bindings/pci/host-generic-pci.txt |  3 +++
>>  drivers/pci/host/pci-host-generic.c| 13 
>> +
>>  2 files changed, 16 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/pci/host-generic-pci.txt 
>> b/Documentation/devicetree/bindings/pci/host-generic-pci.txt
>> index cf3e205..6996af7 100644
>> --- a/Documentation/devicetree/bindings/pci/host-generic-pci.txt
>> +++ b/Documentation/devicetree/bindings/pci/host-generic-pci.txt
>> @@ -36,6 +36,8 @@ Properties of the host controller node:
>>  - reg: The Configuration Space base address and size, as 
>> accessed
>> from the parent bus.
>>
>> +- msi-parent : Specify the phandle of the corresponded MSI controller
>> +   for this PCI host controller.
>>
>>  Properties of the /chosen node:
>>
>> @@ -77,6 +79,7 @@ pci {
>>  device_type = "pci";
>>  #address-cells = <3>;
>>  #size-cells = <2>;
>> +msi-parent = <>;
>>  bus-range = <0x0 0x1>;
>>
>>  // CPU_PHYSICAL(2)  SIZE(2)
>> diff --git a/drivers/pci/host/pci-host-generic.c 
>> b/drivers/pci/host/pci-host-generic.c
>> index 1895907..c4fbcda 100644
>> --- a/drivers/pci/host/pci-host-generic.c
>> +++ b/drivers/pci/host/pci-host-generic.c
>> @@ -42,6 +42,7 @@ struct gen_pci {
>> struct pci_host_bridge  host;
>> struct gen_pci_cfg_windows  cfg;
>> struct list_headresources;
>> +   struct msi_chip *mchip;
>>  };
>>
>>  static void __iomem *gen_pci_map_cfg_bus_cam(struct pci_bus *bus,
>> @@ -122,9 +123,19 @@ static int gen_pci_config_write(struct pci_bus *bus, 
>> unsigned int devfn,
>> return PCIBIOS_SUCCESSFUL;
>>  }
>>
>> +static int gen_pci_set_msi_parent(struct pci_bus *bus)
>> +{
>> +   struct gen_pci *pci = bus_to_gen_pci(bus);
>> +
>> +   bus->msi = pci->mchip;
>> +
>> +   return PCIBIOS_SUCCESSFUL;
>> +}
>> +
>>  static struct pci_ops gen_pci_ops = {
>> .read   = gen_pci_config_read,
>> .write  = gen_pci_config_write,
>> +   .set_msi_parent = gen_pci_set_msi_parent,
>
> We assign the msi chip through add_bus() call, do we still need this?
>

There are series of patches from Yijing Wang around this.  You may have
to go through them.

Srikanth

> Srikanth
>
>>  };
>>
>>  static const struct of_device_id gen_pci_of_match[] = {
>> @@ -303,6 +314,8 @@ static int gen_pci_probe(struct platform_device *pdev)
>> return err;
>> }
>>
>> +   pci->mchip = of_pci_find_msi_chip_by_node(of_parse_phandle(np,
>> + "msi-parent", 0));
>> pci_common_init_dev(dev, );
>> return 0;
>>  }
>> --
>> 1.9.3
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-pci" in
>> the body of a message to majord...@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/


Re: [PATCH V2 2/2] PCI: generic: Add msi_parent DT binding

2014-11-11 Thread Srikanth Thokala
Hi,

On Wed, Nov 12, 2014 at 12:47 AM,   wrote:
> From: Suravee Suthikulpanit 
>
> This patch introduces a new DT binding, msi-parent, which can
> be used to specify MSI-parent phandle for a particular PCI
> generic host controller.
>
> Also, it implements and registers set_msi_parent callback.
>
> Cc: Bjorn Helgass 
> Cc: Liviu Dudau 
> Cc: Will Deacon 
> Cc: Lorenzo Pieralisi 
> Signed-off-by: Suravee Suthikulpanit 
> ---
>  Documentation/devicetree/bindings/pci/host-generic-pci.txt |  3 +++
>  drivers/pci/host/pci-host-generic.c| 13 +
>  2 files changed, 16 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/pci/host-generic-pci.txt 
> b/Documentation/devicetree/bindings/pci/host-generic-pci.txt
> index cf3e205..6996af7 100644
> --- a/Documentation/devicetree/bindings/pci/host-generic-pci.txt
> +++ b/Documentation/devicetree/bindings/pci/host-generic-pci.txt
> @@ -36,6 +36,8 @@ Properties of the host controller node:
>  - reg: The Configuration Space base address and size, as accessed
> from the parent bus.
>
> +- msi-parent : Specify the phandle of the corresponded MSI controller
> +   for this PCI host controller.
>
>  Properties of the /chosen node:
>
> @@ -77,6 +79,7 @@ pci {
>  device_type = "pci";
>  #address-cells = <3>;
>  #size-cells = <2>;
> +msi-parent = <>;
>  bus-range = <0x0 0x1>;
>
>  // CPU_PHYSICAL(2)  SIZE(2)
> diff --git a/drivers/pci/host/pci-host-generic.c 
> b/drivers/pci/host/pci-host-generic.c
> index 1895907..c4fbcda 100644
> --- a/drivers/pci/host/pci-host-generic.c
> +++ b/drivers/pci/host/pci-host-generic.c
> @@ -42,6 +42,7 @@ struct gen_pci {
> struct pci_host_bridge  host;
> struct gen_pci_cfg_windows  cfg;
> struct list_headresources;
> +   struct msi_chip *mchip;
>  };
>
>  static void __iomem *gen_pci_map_cfg_bus_cam(struct pci_bus *bus,
> @@ -122,9 +123,19 @@ static int gen_pci_config_write(struct pci_bus *bus, 
> unsigned int devfn,
> return PCIBIOS_SUCCESSFUL;
>  }
>
> +static int gen_pci_set_msi_parent(struct pci_bus *bus)
> +{
> +   struct gen_pci *pci = bus_to_gen_pci(bus);
> +
> +   bus->msi = pci->mchip;
> +
> +   return PCIBIOS_SUCCESSFUL;
> +}
> +
>  static struct pci_ops gen_pci_ops = {
> .read   = gen_pci_config_read,
> .write  = gen_pci_config_write,
> +   .set_msi_parent = gen_pci_set_msi_parent,

We assign the msi chip through add_bus() call, do we still need this?

Srikanth

>  };
>
>  static const struct of_device_id gen_pci_of_match[] = {
> @@ -303,6 +314,8 @@ static int gen_pci_probe(struct platform_device *pdev)
> return err;
> }
>
> +   pci->mchip = of_pci_find_msi_chip_by_node(of_parse_phandle(np,
> + "msi-parent", 0));
> pci_common_init_dev(dev, );
> return 0;
>  }
> --
> 1.9.3
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-pci" in
> the body of a message to majord...@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/


[PATCH V2 2/2] PCI: generic: Add msi_parent DT binding

2014-11-11 Thread suravee.suthikulpanit
From: Suravee Suthikulpanit 

This patch introduces a new DT binding, msi-parent, which can
be used to specify MSI-parent phandle for a particular PCI
generic host controller.

Also, it implements and registers set_msi_parent callback.

Cc: Bjorn Helgass 
Cc: Liviu Dudau 
Cc: Will Deacon 
Cc: Lorenzo Pieralisi 
Signed-off-by: Suravee Suthikulpanit 
---
 Documentation/devicetree/bindings/pci/host-generic-pci.txt |  3 +++
 drivers/pci/host/pci-host-generic.c| 13 +
 2 files changed, 16 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/host-generic-pci.txt 
b/Documentation/devicetree/bindings/pci/host-generic-pci.txt
index cf3e205..6996af7 100644
--- a/Documentation/devicetree/bindings/pci/host-generic-pci.txt
+++ b/Documentation/devicetree/bindings/pci/host-generic-pci.txt
@@ -36,6 +36,8 @@ Properties of the host controller node:
 - reg: The Configuration Space base address and size, as accessed
from the parent bus.
 
+- msi-parent : Specify the phandle of the corresponded MSI controller
+   for this PCI host controller.
 
 Properties of the /chosen node:
 
@@ -77,6 +79,7 @@ pci {
 device_type = "pci";
 #address-cells = <3>;
 #size-cells = <2>;
+msi-parent = <>;
 bus-range = <0x0 0x1>;
 
 // CPU_PHYSICAL(2)  SIZE(2)
diff --git a/drivers/pci/host/pci-host-generic.c 
b/drivers/pci/host/pci-host-generic.c
index 1895907..c4fbcda 100644
--- a/drivers/pci/host/pci-host-generic.c
+++ b/drivers/pci/host/pci-host-generic.c
@@ -42,6 +42,7 @@ struct gen_pci {
struct pci_host_bridge  host;
struct gen_pci_cfg_windows  cfg;
struct list_headresources;
+   struct msi_chip *mchip;
 };
 
 static void __iomem *gen_pci_map_cfg_bus_cam(struct pci_bus *bus,
@@ -122,9 +123,19 @@ static int gen_pci_config_write(struct pci_bus *bus, 
unsigned int devfn,
return PCIBIOS_SUCCESSFUL;
 }
 
+static int gen_pci_set_msi_parent(struct pci_bus *bus)
+{
+   struct gen_pci *pci = bus_to_gen_pci(bus);
+
+   bus->msi = pci->mchip;
+
+   return PCIBIOS_SUCCESSFUL;
+}
+
 static struct pci_ops gen_pci_ops = {
.read   = gen_pci_config_read,
.write  = gen_pci_config_write,
+   .set_msi_parent = gen_pci_set_msi_parent,
 };
 
 static const struct of_device_id gen_pci_of_match[] = {
@@ -303,6 +314,8 @@ static int gen_pci_probe(struct platform_device *pdev)
return err;
}
 
+   pci->mchip = of_pci_find_msi_chip_by_node(of_parse_phandle(np,
+ "msi-parent", 0));
pci_common_init_dev(dev, );
return 0;
 }
-- 
1.9.3

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


[PATCH V2 2/2] PCI: generic: Add msi_parent DT binding

2014-11-11 Thread suravee.suthikulpanit
From: Suravee Suthikulpanit suravee.suthikulpa...@amd.com

This patch introduces a new DT binding, msi-parent, which can
be used to specify MSI-parent phandle for a particular PCI
generic host controller.

Also, it implements and registers set_msi_parent callback.

Cc: Bjorn Helgass bhelg...@google.com
Cc: Liviu Dudau liviu.du...@arm.com
Cc: Will Deacon will.dea...@arm.com
Cc: Lorenzo Pieralisi lorenzo.pieral...@arm.com
Signed-off-by: Suravee Suthikulpanit suravee.suthikulpa...@amd.com
---
 Documentation/devicetree/bindings/pci/host-generic-pci.txt |  3 +++
 drivers/pci/host/pci-host-generic.c| 13 +
 2 files changed, 16 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/host-generic-pci.txt 
b/Documentation/devicetree/bindings/pci/host-generic-pci.txt
index cf3e205..6996af7 100644
--- a/Documentation/devicetree/bindings/pci/host-generic-pci.txt
+++ b/Documentation/devicetree/bindings/pci/host-generic-pci.txt
@@ -36,6 +36,8 @@ Properties of the host controller node:
 - reg: The Configuration Space base address and size, as accessed
from the parent bus.
 
+- msi-parent : Specify the phandle of the corresponded MSI controller
+   for this PCI host controller.
 
 Properties of the /chosen node:
 
@@ -77,6 +79,7 @@ pci {
 device_type = pci;
 #address-cells = 3;
 #size-cells = 2;
+msi-parent = msictrl0;
 bus-range = 0x0 0x1;
 
 // CPU_PHYSICAL(2)  SIZE(2)
diff --git a/drivers/pci/host/pci-host-generic.c 
b/drivers/pci/host/pci-host-generic.c
index 1895907..c4fbcda 100644
--- a/drivers/pci/host/pci-host-generic.c
+++ b/drivers/pci/host/pci-host-generic.c
@@ -42,6 +42,7 @@ struct gen_pci {
struct pci_host_bridge  host;
struct gen_pci_cfg_windows  cfg;
struct list_headresources;
+   struct msi_chip *mchip;
 };
 
 static void __iomem *gen_pci_map_cfg_bus_cam(struct pci_bus *bus,
@@ -122,9 +123,19 @@ static int gen_pci_config_write(struct pci_bus *bus, 
unsigned int devfn,
return PCIBIOS_SUCCESSFUL;
 }
 
+static int gen_pci_set_msi_parent(struct pci_bus *bus)
+{
+   struct gen_pci *pci = bus_to_gen_pci(bus);
+
+   bus-msi = pci-mchip;
+
+   return PCIBIOS_SUCCESSFUL;
+}
+
 static struct pci_ops gen_pci_ops = {
.read   = gen_pci_config_read,
.write  = gen_pci_config_write,
+   .set_msi_parent = gen_pci_set_msi_parent,
 };
 
 static const struct of_device_id gen_pci_of_match[] = {
@@ -303,6 +314,8 @@ static int gen_pci_probe(struct platform_device *pdev)
return err;
}
 
+   pci-mchip = of_pci_find_msi_chip_by_node(of_parse_phandle(np,
+ msi-parent, 0));
pci_common_init_dev(dev, hw);
return 0;
 }
-- 
1.9.3

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


Re: [PATCH V2 2/2] PCI: generic: Add msi_parent DT binding

2014-11-11 Thread Srikanth Thokala
Hi,

On Wed, Nov 12, 2014 at 12:47 AM,  suravee.suthikulpa...@amd.com wrote:
 From: Suravee Suthikulpanit suravee.suthikulpa...@amd.com

 This patch introduces a new DT binding, msi-parent, which can
 be used to specify MSI-parent phandle for a particular PCI
 generic host controller.

 Also, it implements and registers set_msi_parent callback.

 Cc: Bjorn Helgass bhelg...@google.com
 Cc: Liviu Dudau liviu.du...@arm.com
 Cc: Will Deacon will.dea...@arm.com
 Cc: Lorenzo Pieralisi lorenzo.pieral...@arm.com
 Signed-off-by: Suravee Suthikulpanit suravee.suthikulpa...@amd.com
 ---
  Documentation/devicetree/bindings/pci/host-generic-pci.txt |  3 +++
  drivers/pci/host/pci-host-generic.c| 13 +
  2 files changed, 16 insertions(+)

 diff --git a/Documentation/devicetree/bindings/pci/host-generic-pci.txt 
 b/Documentation/devicetree/bindings/pci/host-generic-pci.txt
 index cf3e205..6996af7 100644
 --- a/Documentation/devicetree/bindings/pci/host-generic-pci.txt
 +++ b/Documentation/devicetree/bindings/pci/host-generic-pci.txt
 @@ -36,6 +36,8 @@ Properties of the host controller node:
  - reg: The Configuration Space base address and size, as accessed
 from the parent bus.

 +- msi-parent : Specify the phandle of the corresponded MSI controller
 +   for this PCI host controller.

  Properties of the /chosen node:

 @@ -77,6 +79,7 @@ pci {
  device_type = pci;
  #address-cells = 3;
  #size-cells = 2;
 +msi-parent = msictrl0;
  bus-range = 0x0 0x1;

  // CPU_PHYSICAL(2)  SIZE(2)
 diff --git a/drivers/pci/host/pci-host-generic.c 
 b/drivers/pci/host/pci-host-generic.c
 index 1895907..c4fbcda 100644
 --- a/drivers/pci/host/pci-host-generic.c
 +++ b/drivers/pci/host/pci-host-generic.c
 @@ -42,6 +42,7 @@ struct gen_pci {
 struct pci_host_bridge  host;
 struct gen_pci_cfg_windows  cfg;
 struct list_headresources;
 +   struct msi_chip *mchip;
  };

  static void __iomem *gen_pci_map_cfg_bus_cam(struct pci_bus *bus,
 @@ -122,9 +123,19 @@ static int gen_pci_config_write(struct pci_bus *bus, 
 unsigned int devfn,
 return PCIBIOS_SUCCESSFUL;
  }

 +static int gen_pci_set_msi_parent(struct pci_bus *bus)
 +{
 +   struct gen_pci *pci = bus_to_gen_pci(bus);
 +
 +   bus-msi = pci-mchip;
 +
 +   return PCIBIOS_SUCCESSFUL;
 +}
 +
  static struct pci_ops gen_pci_ops = {
 .read   = gen_pci_config_read,
 .write  = gen_pci_config_write,
 +   .set_msi_parent = gen_pci_set_msi_parent,

We assign the msi chip through add_bus() call, do we still need this?

Srikanth

  };

  static const struct of_device_id gen_pci_of_match[] = {
 @@ -303,6 +314,8 @@ static int gen_pci_probe(struct platform_device *pdev)
 return err;
 }

 +   pci-mchip = of_pci_find_msi_chip_by_node(of_parse_phandle(np,
 + msi-parent, 0));
 pci_common_init_dev(dev, hw);
 return 0;
  }
 --
 1.9.3

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


Re: [PATCH V2 2/2] PCI: generic: Add msi_parent DT binding

2014-11-11 Thread Srikanth Thokala
Hi,

On Wed, Nov 12, 2014 at 12:26 PM, Srikanth Thokala
sriku.li...@gmail.com wrote:
 Hi,

 On Wed, Nov 12, 2014 at 12:47 AM,  suravee.suthikulpa...@amd.com wrote:
 From: Suravee Suthikulpanit suravee.suthikulpa...@amd.com

 This patch introduces a new DT binding, msi-parent, which can
 be used to specify MSI-parent phandle for a particular PCI
 generic host controller.

 Also, it implements and registers set_msi_parent callback.

 Cc: Bjorn Helgass bhelg...@google.com
 Cc: Liviu Dudau liviu.du...@arm.com
 Cc: Will Deacon will.dea...@arm.com
 Cc: Lorenzo Pieralisi lorenzo.pieral...@arm.com
 Signed-off-by: Suravee Suthikulpanit suravee.suthikulpa...@amd.com
 ---
  Documentation/devicetree/bindings/pci/host-generic-pci.txt |  3 +++
  drivers/pci/host/pci-host-generic.c| 13 
 +
  2 files changed, 16 insertions(+)

 diff --git a/Documentation/devicetree/bindings/pci/host-generic-pci.txt 
 b/Documentation/devicetree/bindings/pci/host-generic-pci.txt
 index cf3e205..6996af7 100644
 --- a/Documentation/devicetree/bindings/pci/host-generic-pci.txt
 +++ b/Documentation/devicetree/bindings/pci/host-generic-pci.txt
 @@ -36,6 +36,8 @@ Properties of the host controller node:
  - reg: The Configuration Space base address and size, as 
 accessed
 from the parent bus.

 +- msi-parent : Specify the phandle of the corresponded MSI controller
 +   for this PCI host controller.

  Properties of the /chosen node:

 @@ -77,6 +79,7 @@ pci {
  device_type = pci;
  #address-cells = 3;
  #size-cells = 2;
 +msi-parent = msictrl0;
  bus-range = 0x0 0x1;

  // CPU_PHYSICAL(2)  SIZE(2)
 diff --git a/drivers/pci/host/pci-host-generic.c 
 b/drivers/pci/host/pci-host-generic.c
 index 1895907..c4fbcda 100644
 --- a/drivers/pci/host/pci-host-generic.c
 +++ b/drivers/pci/host/pci-host-generic.c
 @@ -42,6 +42,7 @@ struct gen_pci {
 struct pci_host_bridge  host;
 struct gen_pci_cfg_windows  cfg;
 struct list_headresources;
 +   struct msi_chip *mchip;
  };

  static void __iomem *gen_pci_map_cfg_bus_cam(struct pci_bus *bus,
 @@ -122,9 +123,19 @@ static int gen_pci_config_write(struct pci_bus *bus, 
 unsigned int devfn,
 return PCIBIOS_SUCCESSFUL;
  }

 +static int gen_pci_set_msi_parent(struct pci_bus *bus)
 +{
 +   struct gen_pci *pci = bus_to_gen_pci(bus);
 +
 +   bus-msi = pci-mchip;
 +
 +   return PCIBIOS_SUCCESSFUL;
 +}
 +
  static struct pci_ops gen_pci_ops = {
 .read   = gen_pci_config_read,
 .write  = gen_pci_config_write,
 +   .set_msi_parent = gen_pci_set_msi_parent,

 We assign the msi chip through add_bus() call, do we still need this?


There are series of patches from Yijing Wang around this.  You may have
to go through them.

Srikanth

 Srikanth

  };

  static const struct of_device_id gen_pci_of_match[] = {
 @@ -303,6 +314,8 @@ static int gen_pci_probe(struct platform_device *pdev)
 return err;
 }

 +   pci-mchip = of_pci_find_msi_chip_by_node(of_parse_phandle(np,
 + msi-parent, 0));
 pci_common_init_dev(dev, hw);
 return 0;
  }
 --
 1.9.3

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