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| author | David Woodhouse <David.Woodhouse@intel.com> | 2012-10-09 18:03:21 +0400 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2012-10-09 18:04:25 +0400 |
| commit | ffe315012510165ce82e4dd4767f0a5dba9edbf7 (patch) | |
| tree | f601cd980af9d0ced5ca9aedecef4fa0d2ca0e15 /include/linux/virtio_config.h | |
| parent | e2d3a35ee427aaba99b6c68a56609ce276c51270 (diff) | |
| parent | 4a8e43feeac7996b8de2d5b2823e316917493df4 (diff) | |
| download | linux-ffe315012510165ce82e4dd4767f0a5dba9edbf7.tar.xz | |
Merge tag 'disintegrate-mtd-20121009' of git://git.infradead.org/users/dhowells/linux-headers
UAPI Disintegration 2012-10-09
Conflicts:
MAINTAINERS
arch/arm/configs/bcmring_defconfig
arch/arm/mach-imx/clk-imx51-imx53.c
drivers/mtd/nand/Kconfig
drivers/mtd/nand/bcm_umi_nand.c
drivers/mtd/nand/nand_bcm_umi.h
drivers/mtd/nand/orion_nand.c
Diffstat (limited to 'include/linux/virtio_config.h')
| -rw-r--r-- | include/linux/virtio_config.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index fc457f452f64..e2850a7ea276 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -84,7 +84,9 @@ * nvqs: the number of virtqueues to find * vqs: on success, includes new virtqueues * callbacks: array of callbacks, for each virtqueue + * include a NULL entry for vqs that do not need a callback * names: array of virtqueue names (mainly for debugging) + * include a NULL entry for vqs unused by driver * Returns 0 on success or error status * @del_vqs: free virtqueues found by find_vqs(). * @get_features: get the array of feature bits for this device. @@ -98,6 +100,7 @@ * vdev: the virtio_device * This returns a pointer to the bus name a la pci_name from which * the caller can then copy. + * @set_vq_affinity: set the affinity for a virtqueue. */ typedef void vq_callback_t(struct virtqueue *); struct virtio_config_ops { @@ -116,6 +119,7 @@ struct virtio_config_ops { u32 (*get_features)(struct virtio_device *vdev); void (*finalize_features)(struct virtio_device *vdev); const char *(*bus_name)(struct virtio_device *vdev); + int (*set_vq_affinity)(struct virtqueue *vq, int cpu); }; /* If driver didn't advertise the feature, it will never appear. */ @@ -190,5 +194,24 @@ const char *virtio_bus_name(struct virtio_device *vdev) return vdev->config->bus_name(vdev); } +/** + * virtqueue_set_affinity - setting affinity for a virtqueue + * @vq: the virtqueue + * @cpu: the cpu no. + * + * Pay attention the function are best-effort: the affinity hint may not be set + * due to config support, irq type and sharing. + * + */ +static inline +int virtqueue_set_affinity(struct virtqueue *vq, int cpu) +{ + struct virtio_device *vdev = vq->vdev; + if (vdev->config->set_vq_affinity) + return vdev->config->set_vq_affinity(vq, cpu); + return 0; +} + + #endif /* __KERNEL__ */ #endif /* _LINUX_VIRTIO_CONFIG_H */ |