在 2015/7/15 20:16, Marc Zyngier 写道:
> With the msi_list and the msi_domain properties now being at the
> generic device level, it is starting to be relatively easy to offer
> a generic way of providing non-PCI MSIs.
>
[...]
> diff --git a/include/linux/msi.h b/include/linux/msi.h
> index c10ec56..b55cf63 100644
> --- a/include/linux/msi.h
> +++ b/include/linux/msi.h
> @@ -18,6 +18,11 @@ struct pci_dev;
> void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
> void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
>
> +typedef void (*irq_write_msi_msg_t)(struct msi_desc *desc,
> + struct msi_msg *msg);
> +
> +struct platform_msi_priv_data;
> +
> struct msi_desc {
> struct list_head list;
> unsigned int irq;
> @@ -42,6 +47,10 @@ struct msi_desc {
> void __iomem *mask_base;
> };
> };
> + struct {
> + struct platform_msi_priv_data *platform_msi_priv_data;
> + u16 msi_index;
> + };
> };
> };
>
When I add this patch in linux 4.2.rc2, this part is rejected. So I added this part
myself. But there is compiling errors.
drivers/base/platform-msi.c: In function 'platform_msi_free_descs':
drivers/base/platform-msi.c:129:2: error: implicit declaration of function 'to_pci_dev' [-Werror=implicit-function-declaration]
list_for_each_entry_safe(desc, tmp, dev_to_msi_list(dev), list) {
^
In file included from include/linux/list.h:8:0,
from include/linux/kobject.h:20,
from include/linux/device.h:17,
from drivers/base/platform-msi.c:20:
include/linux/msi.h:57:50: error: invalid type argument of '->' (have 'int')
#define dev_to_msi_list(dev) (&to_pci_dev((dev))->msi_list)
^
include/linux/kernel.h:810:49: note: in definition of macro 'container_of'
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
^
> @@ -228,6 +237,12 @@ int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
> void msi_domain_free_irqs(struct irq_domain *domain, struct device *dev);
> struct msi_domain_info *msi_get_domain_info(struct irq_domain *domain);
>
> +struct irq_domain *platform_msi_create_irq_domain(struct device_node *np,
> + struct msi_domain_info *info,
> + struct irq_domain *parent);
> +int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
> + irq_write_msi_msg_t write_msi_msg);
> +void platform_msi_domain_free_irqs(struct device *dev);
> #endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */
>
> #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
>
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