diff mbox

[Xen-devel,v1,06/21] PCI/MSI: Refactor struct msi_chip to make it become more common

Message ID 1409911806-10519-7-git-send-email-wangyijing@huawei.com
State New
Headers show

Commit Message

wangyijing Sept. 5, 2014, 10:09 a.m. UTC 
Now there are a lot of __weak arch functions in MSI code.
These functions make MSI driver complex. Thierry Reding Introduced
a new MSI chip framework to configure MSI/MSI-X irq in ARM. Use
the new MSI chip framework to refactor all other platform MSI
arch code to eliminate weak arch MSI functions. This patch add
.restore_irq() and .setup_irqs() to make it become more common.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
---
 drivers/pci/msi.c   |   15 +++++++++++++++
 include/linux/msi.h |    3 +++
 2 files changed, 18 insertions(+), 0 deletions(-)

Comments

Lucas Stach Sept. 15, 2014, 2:44 p.m. UTC | #1 
Am Freitag, den 05.09.2014, 18:09 +0800 schrieb Yijing Wang:
> Now there are a lot of __weak arch functions in MSI code.
> These functions make MSI driver complex. Thierry Reding Introduced
> a new MSI chip framework to configure MSI/MSI-X irq in ARM. Use
> the new MSI chip framework to refactor all other platform MSI
> arch code to eliminate weak arch MSI functions. This patch add
> .restore_irq() and .setup_irqs() to make it become more common.
> 
> Signed-off-by: Yijing Wang <wangyijing@huawei.com>

This change looks good to me:
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>

> ---
>  drivers/pci/msi.c   |   15 +++++++++++++++
>  include/linux/msi.h |    3 +++
>  2 files changed, 18 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index 539c11d..d78d637 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -63,6 +63,11 @@ int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
>  {
>  	struct msi_desc *entry;
>  	int ret;
> +	struct msi_chip *chip;
> +
> +	chip = arch_find_msi_chip(dev);
> +	if (chip && chip->setup_irqs)
> +		return chip->setup_irqs(dev, nvec, type);
>  
>  	/*
>  	 * If an architecture wants to support multiple MSI, it needs to
> @@ -105,6 +110,11 @@ void default_teardown_msi_irqs(struct pci_dev *dev)
>  
>  void __weak arch_teardown_msi_irqs(struct pci_dev *dev)
>  {
> +	struct msi_chip *chip = arch_find_msi_chip(dev);
> +
> +	if (chip && chip->teardown_irqs)
> +		return chip->teardown_irqs(dev);
> +
>  	return default_teardown_msi_irqs(dev);
>  }
>  
> @@ -128,6 +138,11 @@ static void default_restore_msi_irq(struct pci_dev *dev, int irq)
>  
>  void __weak arch_restore_msi_irqs(struct pci_dev *dev)
>  {
> +	struct msi_chip *chip = arch_find_msi_chip(dev);
> +
> +	if (chip && chip->restore_irqs)
> +		return chip->restore_irqs(dev);
> +
>  	return default_restore_msi_irqs(dev);
>  }
>  
> diff --git a/include/linux/msi.h b/include/linux/msi.h
> index 5650848..92a51e7 100644
> --- a/include/linux/msi.h
> +++ b/include/linux/msi.h
> @@ -72,7 +72,10 @@ struct msi_chip {
>  	struct list_head list;
>  
>  	int (*setup_irq)(struct pci_dev *dev, struct msi_desc *desc);
> +	int (*setup_irqs)(struct pci_dev *dev, int nvec, int type);
>  	void (*teardown_irq)(unsigned int irq);
> +	void (*teardown_irqs)(struct pci_dev *dev);
> +	void (*restore_irqs)(struct pci_dev *dev);
>  };
>  
>  #endif /* LINUX_MSI_H */
wangyijing Sept. 16, 2014, 2:09 a.m. UTC | #2 
On 2014/9/15 22:44, Lucas Stach wrote:
> Am Freitag, den 05.09.2014, 18:09 +0800 schrieb Yijing Wang:
>> Now there are a lot of __weak arch functions in MSI code.
>> These functions make MSI driver complex. Thierry Reding Introduced
>> a new MSI chip framework to configure MSI/MSI-X irq in ARM. Use
>> the new MSI chip framework to refactor all other platform MSI
>> arch code to eliminate weak arch MSI functions. This patch add
>> .restore_irq() and .setup_irqs() to make it become more common.
>>
>> Signed-off-by: Yijing Wang <wangyijing@huawei.com>
> 
> This change looks good to me:
> Reviewed-by: Lucas Stach <l.stach@pengutronix.de>

Thanks!

> 
>> ---
>>  drivers/pci/msi.c   |   15 +++++++++++++++
>>  include/linux/msi.h |    3 +++
>>  2 files changed, 18 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
>> index 539c11d..d78d637 100644
>> --- a/drivers/pci/msi.c
>> +++ b/drivers/pci/msi.c
>> @@ -63,6 +63,11 @@ int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
>>  {
>>  	struct msi_desc *entry;
>>  	int ret;
>> +	struct msi_chip *chip;
>> +
>> +	chip = arch_find_msi_chip(dev);
>> +	if (chip && chip->setup_irqs)
>> +		return chip->setup_irqs(dev, nvec, type);
>>  
>>  	/*
>>  	 * If an architecture wants to support multiple MSI, it needs to
>> @@ -105,6 +110,11 @@ void default_teardown_msi_irqs(struct pci_dev *dev)
>>  
>>  void __weak arch_teardown_msi_irqs(struct pci_dev *dev)
>>  {
>> +	struct msi_chip *chip = arch_find_msi_chip(dev);
>> +
>> +	if (chip && chip->teardown_irqs)
>> +		return chip->teardown_irqs(dev);
>> +
>>  	return default_teardown_msi_irqs(dev);
>>  }
>>  
>> @@ -128,6 +138,11 @@ static void default_restore_msi_irq(struct pci_dev *dev, int irq)
>>  
>>  void __weak arch_restore_msi_irqs(struct pci_dev *dev)
>>  {
>> +	struct msi_chip *chip = arch_find_msi_chip(dev);
>> +
>> +	if (chip && chip->restore_irqs)
>> +		return chip->restore_irqs(dev);
>> +
>>  	return default_restore_msi_irqs(dev);
>>  }
>>  
>> diff --git a/include/linux/msi.h b/include/linux/msi.h
>> index 5650848..92a51e7 100644
>> --- a/include/linux/msi.h
>> +++ b/include/linux/msi.h
>> @@ -72,7 +72,10 @@ struct msi_chip {
>>  	struct list_head list;
>>  
>>  	int (*setup_irq)(struct pci_dev *dev, struct msi_desc *desc);
>> +	int (*setup_irqs)(struct pci_dev *dev, int nvec, int type);
>>  	void (*teardown_irq)(unsigned int irq);
>> +	void (*teardown_irqs)(struct pci_dev *dev);
>> +	void (*restore_irqs)(struct pci_dev *dev);
>>  };
>>  
>>  #endif /* LINUX_MSI_H */
>
diff mbox

Patch

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 539c11d..d78d637 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -63,6 +63,11 @@  int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 {
 	struct msi_desc *entry;
 	int ret;
+	struct msi_chip *chip;
+
+	chip = arch_find_msi_chip(dev);
+	if (chip && chip->setup_irqs)
+		return chip->setup_irqs(dev, nvec, type);
 
 	/*
 	 * If an architecture wants to support multiple MSI, it needs to
@@ -105,6 +110,11 @@  void default_teardown_msi_irqs(struct pci_dev *dev)
 
 void __weak arch_teardown_msi_irqs(struct pci_dev *dev)
 {
+	struct msi_chip *chip = arch_find_msi_chip(dev);
+
+	if (chip && chip->teardown_irqs)
+		return chip->teardown_irqs(dev);
+
 	return default_teardown_msi_irqs(dev);
 }
 
@@ -128,6 +138,11 @@  static void default_restore_msi_irq(struct pci_dev *dev, int irq)
 
 void __weak arch_restore_msi_irqs(struct pci_dev *dev)
 {
+	struct msi_chip *chip = arch_find_msi_chip(dev);
+
+	if (chip && chip->restore_irqs)
+		return chip->restore_irqs(dev);
+
 	return default_restore_msi_irqs(dev);
 }
 
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 5650848..92a51e7 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -72,7 +72,10 @@  struct msi_chip {
 	struct list_head list;
 
 	int (*setup_irq)(struct pci_dev *dev, struct msi_desc *desc);
+	int (*setup_irqs)(struct pci_dev *dev, int nvec, int type);
 	void (*teardown_irq)(unsigned int irq);
+	void (*teardown_irqs)(struct pci_dev *dev);
+	void (*restore_irqs)(struct pci_dev *dev);
 };
 
 #endif /* LINUX_MSI_H */