diff mbox

[v4,1/5] ARM/PCI: remove align_resource in pci_sys_data

Message ID 1437461323-3531-2-git-send-email-wangzhou1@hisilicon.com (mailing list archive)
State New, archived
Delegated to: Bjorn Helgaas
Headers show

Commit Message

Zhou Wang July 21, 2015, 6:48 a.m. UTC
This patch is needed in order to unify the PCIe designware framework for ARM and
ARM64 architectures. In the PCIe designware unification process we are calling
pci_create_root_bus() passing a "sysdata" parameter that is the same for both
ARM and ARM64 and is of type "struct pcie_port*". In the ARM case this will
cause a problem with the function pcibios_align_resource(); in fact this will
cast "dev->sysdata" to "struct pci_sys_data*", whereas designware had passed a
"struct pcie_port*" pointer.

This patch solves the issue by removing "align_resource" from "pci_sys_data"
struct and defining a static global function pointer in "bios32.c"

Signed-off-by: Gabriele Paoloni <gabriele.paoloni at huawei.com>
Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com>
---
 arch/arm/include/asm/mach/pci.h |  5 -----
 arch/arm/kernel/bios32.c        | 12 ++++++++----
 2 files changed, 8 insertions(+), 9 deletions(-)

Comments

Bjorn Helgaas July 21, 2015, 10:44 p.m. UTC | #1
Hi Zhou & Gabriele,

On Tue, Jul 21, 2015 at 02:48:39PM +0800, Zhou Wang wrote:
> This patch is needed in order to unify the PCIe designware framework for ARM and
> ARM64 architectures. In the PCIe designware unification process we are calling
> pci_create_root_bus() passing a "sysdata" parameter that is the same for both
> ARM and ARM64 and is of type "struct pcie_port*". In the ARM case this will
> cause a problem with the function pcibios_align_resource(); in fact this will
> cast "dev->sysdata" to "struct pci_sys_data*", whereas designware had passed a
> "struct pcie_port*" pointer.
> 
> This patch solves the issue by removing "align_resource" from "pci_sys_data"
> struct and defining a static global function pointer in "bios32.c"
> 
> Signed-off-by: Gabriele Paoloni <gabriele.paoloni at huawei.com>
> Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com>

Can you fix up Gabriele's email address above (currently contains " at ")
and verify that this sign-off chain is accurate per section 11 of
Documentation/SubmittingPatches?  The above suggests to me that Gabriele
originally wrote this patch and Zhou is passing it along.  That might well
be true; I haven't followed the development, so I'm just double-checking.

> ---
>  arch/arm/include/asm/mach/pci.h |  5 -----
>  arch/arm/kernel/bios32.c        | 12 ++++++++----
>  2 files changed, 8 insertions(+), 9 deletions(-)
> 
> diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h
> index 28b9bb3..8a4e4de 100644
> --- a/arch/arm/include/asm/mach/pci.h
> +++ b/arch/arm/include/asm/mach/pci.h
> @@ -58,11 +58,6 @@ struct pci_sys_data {
>  					/* IRQ mapping				*/
>  	int		(*map_irq)(const struct pci_dev *, u8, u8);
>  					/* Resource alignement requirements	*/
> -	resource_size_t (*align_resource)(struct pci_dev *dev,
> -					  const struct resource *res,
> -					  resource_size_t start,
> -					  resource_size_t size,
> -					  resource_size_t align);
>  	void		*private_data;	/* platform controller private data	*/
>  };
>  
> diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
> index fcbbbb1..4cdc64d 100644
> --- a/arch/arm/kernel/bios32.c
> +++ b/arch/arm/kernel/bios32.c
> @@ -17,6 +17,11 @@
>  #include <asm/mach/pci.h>
>  
>  static int debug_pci;
> +static resource_size_t (*align_resource)(struct pci_dev *dev,
> +		  const struct resource *res,
> +		  resource_size_t start,
> +		  resource_size_t size,
> +		  resource_size_t align) = NULL;
>  
>  #ifdef CONFIG_PCI_MSI
>  struct msi_controller *pcibios_msi_controller(struct pci_dev *dev)
> @@ -468,7 +473,7 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
>  		sys->busnr   = busnr;
>  		sys->swizzle = hw->swizzle;
>  		sys->map_irq = hw->map_irq;
> -		sys->align_resource = hw->align_resource;
> +		align_resource = hw->align_resource;
>  		INIT_LIST_HEAD(&sys->resources);
>  
>  		if (hw->private_data)
> @@ -589,7 +594,6 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
>  				resource_size_t size, resource_size_t align)
>  {
>  	struct pci_dev *dev = data;
> -	struct pci_sys_data *sys = dev->sysdata;
>  	resource_size_t start = res->start;
>  
>  	if (res->flags & IORESOURCE_IO && start & 0x300)
> @@ -597,8 +601,8 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
>  
>  	start = (start + align - 1) & ~(align - 1);
>  
> -	if (sys->align_resource)
> -		return sys->align_resource(dev, res, start, size, align);
> +	if (align_resource)
> +		return align_resource(dev, res, start, size, align);
>  
>  	return start;
>  }
> -- 
> 1.9.1
> 
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Zhou Wang July 22, 2015, 2 a.m. UTC | #2
On 2015/7/22 6:44, Bjorn Helgaas wrote:
> Hi Zhou & Gabriele,
> 
> On Tue, Jul 21, 2015 at 02:48:39PM +0800, Zhou Wang wrote:
>> This patch is needed in order to unify the PCIe designware framework for ARM and
>> ARM64 architectures. In the PCIe designware unification process we are calling
>> pci_create_root_bus() passing a "sysdata" parameter that is the same for both
>> ARM and ARM64 and is of type "struct pcie_port*". In the ARM case this will
>> cause a problem with the function pcibios_align_resource(); in fact this will
>> cast "dev->sysdata" to "struct pci_sys_data*", whereas designware had passed a
>> "struct pcie_port*" pointer.
>>
>> This patch solves the issue by removing "align_resource" from "pci_sys_data"
>> struct and defining a static global function pointer in "bios32.c"
>>
>> Signed-off-by: Gabriele Paoloni <gabriele.paoloni at huawei.com>
>> Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com>
> 
> Can you fix up Gabriele's email address above (currently contains " at ")
> and verify that this sign-off chain is accurate per section 11 of
> Documentation/SubmittingPatches?  The above suggests to me that Gabriele
> originally wrote this patch and Zhou is passing it along.  That might well
> be true; I haven't followed the development, so I'm just double-checking.
>

Hi Bjorn,

Sorry about above mistake. Will change it in next version.

Thanks for your reminding,
Zhou

>> ---
>>  arch/arm/include/asm/mach/pci.h |  5 -----
>>  arch/arm/kernel/bios32.c        | 12 ++++++++----
>>  2 files changed, 8 insertions(+), 9 deletions(-)
>>
>> diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h
>> index 28b9bb3..8a4e4de 100644
>> --- a/arch/arm/include/asm/mach/pci.h
>> +++ b/arch/arm/include/asm/mach/pci.h
>> @@ -58,11 +58,6 @@ struct pci_sys_data {
>>  					/* IRQ mapping				*/
>>  	int		(*map_irq)(const struct pci_dev *, u8, u8);
>>  					/* Resource alignement requirements	*/
>> -	resource_size_t (*align_resource)(struct pci_dev *dev,
>> -					  const struct resource *res,
>> -					  resource_size_t start,
>> -					  resource_size_t size,
>> -					  resource_size_t align);
>>  	void		*private_data;	/* platform controller private data	*/
>>  };
>>  
>> diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
>> index fcbbbb1..4cdc64d 100644
>> --- a/arch/arm/kernel/bios32.c
>> +++ b/arch/arm/kernel/bios32.c
>> @@ -17,6 +17,11 @@
>>  #include <asm/mach/pci.h>
>>  
>>  static int debug_pci;
>> +static resource_size_t (*align_resource)(struct pci_dev *dev,
>> +		  const struct resource *res,
>> +		  resource_size_t start,
>> +		  resource_size_t size,
>> +		  resource_size_t align) = NULL;
>>  
>>  #ifdef CONFIG_PCI_MSI
>>  struct msi_controller *pcibios_msi_controller(struct pci_dev *dev)
>> @@ -468,7 +473,7 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
>>  		sys->busnr   = busnr;
>>  		sys->swizzle = hw->swizzle;
>>  		sys->map_irq = hw->map_irq;
>> -		sys->align_resource = hw->align_resource;
>> +		align_resource = hw->align_resource;
>>  		INIT_LIST_HEAD(&sys->resources);
>>  
>>  		if (hw->private_data)
>> @@ -589,7 +594,6 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
>>  				resource_size_t size, resource_size_t align)
>>  {
>>  	struct pci_dev *dev = data;
>> -	struct pci_sys_data *sys = dev->sysdata;
>>  	resource_size_t start = res->start;
>>  
>>  	if (res->flags & IORESOURCE_IO && start & 0x300)
>> @@ -597,8 +601,8 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
>>  
>>  	start = (start + align - 1) & ~(align - 1);
>>  
>> -	if (sys->align_resource)
>> -		return sys->align_resource(dev, res, start, size, align);
>> +	if (align_resource)
>> +		return align_resource(dev, res, start, size, align);
>>  
>>  	return start;
>>  }
>> -- 
>> 1.9.1
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-pci" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> .
> 


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Lorenzo Pieralisi July 23, 2015, 6:06 p.m. UTC | #3
[CC'ing Thomas and Jason for pci-mvebu]

On Tue, Jul 21, 2015 at 07:48:39AM +0100, Zhou Wang wrote:
> This patch is needed in order to unify the PCIe designware framework for ARM and
> ARM64 architectures. In the PCIe designware unification process we are calling
> pci_create_root_bus() passing a "sysdata" parameter that is the same for both
> ARM and ARM64 and is of type "struct pcie_port*". In the ARM case this will
> cause a problem with the function pcibios_align_resource(); in fact this will
> cast "dev->sysdata" to "struct pci_sys_data*", whereas designware had passed a
> "struct pcie_port*" pointer.
> 
> This patch solves the issue by removing "align_resource" from "pci_sys_data"
> struct and defining a static global function pointer in "bios32.c"
> 
> Signed-off-by: Gabriele Paoloni <gabriele.paoloni at huawei.com>
> Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com>

Arnd, Rob any opinion on this ? It is really the last blocking bit
to having common ARM/ARM64 drivers (and get rid of pci_sys_data) so I
would like to get this sorted asap (having a global function pointer
might be a temporary solution before moving it to the host bridge
structure).

Comments welcome.

Thanks !
Lorenzo

> ---
>  arch/arm/include/asm/mach/pci.h |  5 -----
>  arch/arm/kernel/bios32.c        | 12 ++++++++----
>  2 files changed, 8 insertions(+), 9 deletions(-)
> 
> diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h
> index 28b9bb3..8a4e4de 100644
> --- a/arch/arm/include/asm/mach/pci.h
> +++ b/arch/arm/include/asm/mach/pci.h
> @@ -58,11 +58,6 @@ struct pci_sys_data {
>  					/* IRQ mapping				*/
>  	int		(*map_irq)(const struct pci_dev *, u8, u8);
>  					/* Resource alignement requirements	*/
> -	resource_size_t (*align_resource)(struct pci_dev *dev,
> -					  const struct resource *res,
> -					  resource_size_t start,
> -					  resource_size_t size,
> -					  resource_size_t align);
>  	void		*private_data;	/* platform controller private data	*/
>  };
>  
> diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
> index fcbbbb1..4cdc64d 100644
> --- a/arch/arm/kernel/bios32.c
> +++ b/arch/arm/kernel/bios32.c
> @@ -17,6 +17,11 @@
>  #include <asm/mach/pci.h>
>  
>  static int debug_pci;
> +static resource_size_t (*align_resource)(struct pci_dev *dev,
> +		  const struct resource *res,
> +		  resource_size_t start,
> +		  resource_size_t size,
> +		  resource_size_t align) = NULL;
>  
>  #ifdef CONFIG_PCI_MSI
>  struct msi_controller *pcibios_msi_controller(struct pci_dev *dev)
> @@ -468,7 +473,7 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
>  		sys->busnr   = busnr;
>  		sys->swizzle = hw->swizzle;
>  		sys->map_irq = hw->map_irq;
> -		sys->align_resource = hw->align_resource;
> +		align_resource = hw->align_resource;
>  		INIT_LIST_HEAD(&sys->resources);
>  
>  		if (hw->private_data)
> @@ -589,7 +594,6 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
>  				resource_size_t size, resource_size_t align)
>  {
>  	struct pci_dev *dev = data;
> -	struct pci_sys_data *sys = dev->sysdata;
>  	resource_size_t start = res->start;
>  
>  	if (res->flags & IORESOURCE_IO && start & 0x300)
> @@ -597,8 +601,8 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
>  
>  	start = (start + align - 1) & ~(align - 1);
>  
> -	if (sys->align_resource)
> -		return sys->align_resource(dev, res, start, size, align);
> +	if (align_resource)
> +		return align_resource(dev, res, start, size, align);
>  
>  	return start;
>  }
> -- 
> 1.9.1
> 
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diff mbox

Patch

diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h
index 28b9bb3..8a4e4de 100644
--- a/arch/arm/include/asm/mach/pci.h
+++ b/arch/arm/include/asm/mach/pci.h
@@ -58,11 +58,6 @@  struct pci_sys_data {
 					/* IRQ mapping				*/
 	int		(*map_irq)(const struct pci_dev *, u8, u8);
 					/* Resource alignement requirements	*/
-	resource_size_t (*align_resource)(struct pci_dev *dev,
-					  const struct resource *res,
-					  resource_size_t start,
-					  resource_size_t size,
-					  resource_size_t align);
 	void		*private_data;	/* platform controller private data	*/
 };
 
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index fcbbbb1..4cdc64d 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -17,6 +17,11 @@ 
 #include <asm/mach/pci.h>
 
 static int debug_pci;
+static resource_size_t (*align_resource)(struct pci_dev *dev,
+		  const struct resource *res,
+		  resource_size_t start,
+		  resource_size_t size,
+		  resource_size_t align) = NULL;
 
 #ifdef CONFIG_PCI_MSI
 struct msi_controller *pcibios_msi_controller(struct pci_dev *dev)
@@ -468,7 +473,7 @@  static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
 		sys->busnr   = busnr;
 		sys->swizzle = hw->swizzle;
 		sys->map_irq = hw->map_irq;
-		sys->align_resource = hw->align_resource;
+		align_resource = hw->align_resource;
 		INIT_LIST_HEAD(&sys->resources);
 
 		if (hw->private_data)
@@ -589,7 +594,6 @@  resource_size_t pcibios_align_resource(void *data, const struct resource *res,
 				resource_size_t size, resource_size_t align)
 {
 	struct pci_dev *dev = data;
-	struct pci_sys_data *sys = dev->sysdata;
 	resource_size_t start = res->start;
 
 	if (res->flags & IORESOURCE_IO && start & 0x300)
@@ -597,8 +601,8 @@  resource_size_t pcibios_align_resource(void *data, const struct resource *res,
 
 	start = (start + align - 1) & ~(align - 1);
 
-	if (sys->align_resource)
-		return sys->align_resource(dev, res, start, size, align);
+	if (align_resource)
+		return align_resource(dev, res, start, size, align);
 
 	return start;
 }