[PATCH v1 06/21] PCI/MSI: Refactor struct msi_chip to make it become more common
Lucas Stach
l.stach at pengutronix.de
Tue Sep 16 00:44:21 EST 2014
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 at huawei.com>
This change looks good to me:
Reviewed-by: Lucas Stach <l.stach at 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 */
--
Pengutronix e.K. | Lucas Stach |
Industrial Linux Solutions | http://www.pengutronix.de/ |
More information about the Linuxppc-dev
mailing list