On Tue, Oct 21, 2008 at 07:53:08PM +0800, Yu Zhao wrote:
> Support Single Root I/O Virtualization (SR-IOV) capability.
>
> Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
> Cc: Randy Dunlap <randy.dunlap@xxxxxxxxxx>
> Cc: Grant Grundler <grundler@xxxxxxxxxxxxxxxx>
> Cc: Alex Chiang <achiang@xxxxxx>
> Cc: Matthew Wilcox <matthew@xxxxxx>
> Cc: Roland Dreier <rdreier@xxxxxxxxx>
> Cc: Greg KH <greg@xxxxxxxxx>
> Signed-off-by: Yu Zhao <yu.zhao@xxxxxxxxx>
>
> ---
> drivers/pci/Kconfig | 12 +
> drivers/pci/Makefile | 2 +
> drivers/pci/iov.c | 616 ++++++++++++++++++++++++++++++++++++++++++++++
> drivers/pci/pci-sysfs.c | 4 +
> drivers/pci/pci.c | 14 +
> drivers/pci/pci.h | 48 ++++
> drivers/pci/probe.c | 4 +
> include/linux/pci.h | 40 +++
> include/linux/pci_regs.h | 21 ++
> 9 files changed, 761 insertions(+), 0 deletions(-)
> create mode 100644 drivers/pci/iov.c
>
> diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
> index e1ca425..e7c0836 100644
> --- a/drivers/pci/Kconfig
> +++ b/drivers/pci/Kconfig
> @@ -50,3 +50,15 @@ config HT_IRQ
> This allows native hypertransport devices to use interrupts.
>
> If unsure say Y.
> +
> +config PCI_IOV
> + bool "PCI SR-IOV support"
> + depends on PCI
> + select PCI_MSI
> + default n
> + help
> + This option allows device drivers to enable Single Root I/O
> + Virtualization. Each Virtual Function's PCI configuration
> + space can be accessed using its own Bus, Device and Function
> + Number (Routing ID). Each Virtual Function also has PCI Memory
> + Space, which is used to map its own register set.
> diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
> index 4b47f4e..abbfcfa 100644
> --- a/drivers/pci/Makefile
> +++ b/drivers/pci/Makefile
> @@ -55,3 +55,5 @@ obj-$(CONFIG_PCI_SYSCALL) += syscall.o
> ifeq ($(CONFIG_PCI_DEBUG),y)
> EXTRA_CFLAGS += -DDEBUG
> endif
> +
> +obj-$(CONFIG_PCI_IOV) += iov.o
> diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
> new file mode 100644
> index 0000000..571a46c
> --- /dev/null
> +++ b/drivers/pci/iov.c
> @@ -0,0 +1,616 @@
> +/*
> + * drivers/pci/iov.c
> + *
> + * Copyright (C) 2008 Intel Corporation
> + *
> + * PCI Express Single Root I/O Virtualization capability support.
> + */
> +
> +#include <linux/ctype.h>
> +#include <linux/string.h>
> +#include <linux/pci.h>
> +#include <linux/delay.h>
> +#include <asm/page.h>
> +#include "pci.h"
> +
> +
> +#define iov_config_attr(field) \
> +static ssize_t field##_show(struct device *dev, \
> + struct device_attribute *attr, char *buf) \
> +{ \
> + struct pci_dev *pdev = to_pci_dev(dev); \
> + return sprintf(buf, "%d\n", pdev->iov->field); \
> +}
> +
> +iov_config_attr(status);
> +iov_config_attr(totalvfs);
> +iov_config_attr(initialvfs);
> +iov_config_attr(numvfs);
As you are adding new sysfs entries, can you also create the proper
documentation in Documentation/ABI/ so that people can understand how to
use them? Yes, I see you added a stand-alone document, but putting it
in the "standard" format is also necessary.
thanks,
greg k-h
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