search for: vringh_iov_push_kern

...return 0; } +static inline int kern_xfer(void *dst, void *src, size_t len) +{ + memcpy(dst, src, len); + return 0; +} + /** * vringh_init_kern - initialize a vringh for a kernelspace vring. * @vrh: the vringh to initialize. @@ -958,7 +964,7 @@ EXPORT_SYMBOL(vringh_iov_pull_kern); ssize_t vringh_iov_push_kern(struct vringh_kiov *wiov, const void *src, size_t len) { - return vringh_iov_xfer(wiov, (void *)src, len, xfer_kern); + return vringh_iov_xfer(wiov, (void *)src, len, kern_xfer); } EXPORT_SYMBOL(vringh_iov_push_kern); -- 2.19.1

...return 0; } +static inline int kern_xfer(void *dst, void *src, size_t len) +{ + memcpy(dst, src, len); + return 0; +} + /** * vringh_init_kern - initialize a vringh for a kernelspace vring. * @vrh: the vringh to initialize. @@ -958,7 +964,7 @@ EXPORT_SYMBOL(vringh_iov_pull_kern); ssize_t vringh_iov_push_kern(struct vringh_kiov *wiov, const void *src, size_t len) { - return vringh_iov_xfer(wiov, (void *)src, len, xfer_kern); + return vringh_iov_xfer(wiov, (void *)src, len, kern_xfer); } EXPORT_SYMBOL(vringh_iov_push_kern); -- 2.19.1

...*dst, void *src, size_t len) > +{ > + memcpy(dst, src, len); > + return 0; > +} > + > /** > * vringh_init_kern - initialize a vringh for a kernelspace vring. > * @vrh: the vringh to initialize. > @@ -958,7 +964,7 @@ EXPORT_SYMBOL(vringh_iov_pull_kern); > ssize_t vringh_iov_push_kern(struct vringh_kiov *wiov, > const void *src, size_t len) > { > - return vringh_iov_xfer(wiov, (void *)src, len, xfer_kern); > + return vringh_iov_xfer(wiov, (void *)src, len, kern_xfer); > } > EXPORT_SYMBOL(vringh_iov_push_kern); >

...*dst, void *src, size_t len) > +{ > + memcpy(dst, src, len); > + return 0; > +} > + > /** > * vringh_init_kern - initialize a vringh for a kernelspace vring. > * @vrh: the vringh to initialize. > @@ -958,7 +964,7 @@ EXPORT_SYMBOL(vringh_iov_pull_kern); > ssize_t vringh_iov_push_kern(struct vringh_kiov *wiov, > const void *src, size_t len) > { > - return vringh_iov_xfer(wiov, (void *)src, len, xfer_kern); > + return vringh_iov_xfer(wiov, (void *)src, len, kern_xfer); > } > EXPORT_SYMBOL(vringh_iov_push_kern); >

...return 0; } +static inline int kern_xfer(void *dst, void *src, size_t len) +{ + memcpy(dst, src, len); + return 0; +} + /** * vringh_init_kern - initialize a vringh for a kernelspace vring. * @vrh: the vringh to initialize. @@ -958,7 +964,7 @@ EXPORT_SYMBOL(vringh_iov_pull_kern); ssize_t vringh_iov_push_kern(struct vringh_kiov *wiov, const void *src, size_t len) { - return vringh_iov_xfer(wiov, (void *)src, len, xfer_kern); + return vringh_iov_xfer(wiov, (void *)src, len, kern_xfer); } EXPORT_SYMBOL(vringh_iov_push_kern); -- 2.19.1

...t; + memcpy(dst, src, len); > > + return 0; > > +} > > + > > /** > > * vringh_init_kern - initialize a vringh for a kernelspace vring. > > * @vrh: the vringh to initialize. > > @@ -958,7 +964,7 @@ EXPORT_SYMBOL(vringh_iov_pull_kern); > > ssize_t vringh_iov_push_kern(struct vringh_kiov *wiov, > > const void *src, size_t len) > > { > > - return vringh_iov_xfer(wiov, (void *)src, len, xfer_kern); > > + return vringh_iov_xfer(wiov, (void *)src, len, kern_xfer); > > } > > EXPORT_SYMBOL(vringh_iov_push_kern); > >

...*dst, void *src, size_t len) > +{ > + memcpy(dst, src, len); > + return 0; > +} > + > /** > * vringh_init_kern - initialize a vringh for a kernelspace vring. > * @vrh: the vringh to initialize. > @@ -958,7 +964,7 @@ EXPORT_SYMBOL(vringh_iov_pull_kern); > ssize_t vringh_iov_push_kern(struct vringh_kiov *wiov, > const void *src, size_t len) > { > - return vringh_iov_xfer(wiov, (void *)src, len, xfer_kern); > + return vringh_iov_xfer(wiov, (void *)src, len, kern_xfer); > } > EXPORT_SYMBOL(vringh_iov_push_kern); > > -- > 2.19.1

...t; + return 0; > > > +} > > > + > > > /** > > > * vringh_init_kern - initialize a vringh for a kernelspace vring. > > > * @vrh: the vringh to initialize. > > > @@ -958,7 +964,7 @@ EXPORT_SYMBOL(vringh_iov_pull_kern); > > > ssize_t vringh_iov_push_kern(struct vringh_kiov *wiov, > > > const void *src, size_t len) > > > { > > > - return vringh_iov_xfer(wiov, (void *)src, len, xfer_kern); > > > + return vringh_iov_xfer(wiov, (void *)src, len, kern_xfer); > > > } > > > EXPORT_SYMBOL(vr...

...dded545887d02754948ca5241: Linux 5.4-rc4 (2019-10-20 15:56:22 -0400) are available in the Git repository at: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes up to b3683dee840274e9997d958b9d82e5de95950f0b: vringh: fix copy direction of vringh_iov_push_kern() (2019-10-28 04:25:04 -0400) ---------------------------------------------------------------- virtio: fixes Some minor fixes Signed-off-by: Michael S. Tsirkin <mst at redhat.com> ---------------------------------------------------------------- Jason Wang (1): vringh: fix copy direc...

...dded545887d02754948ca5241: Linux 5.4-rc4 (2019-10-20 15:56:22 -0400) are available in the Git repository at: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes up to b3683dee840274e9997d958b9d82e5de95950f0b: vringh: fix copy direction of vringh_iov_push_kern() (2019-10-28 04:25:04 -0400) ---------------------------------------------------------------- virtio: fixes Some minor fixes Signed-off-by: Michael S. Tsirkin <mst at redhat.com> ---------------------------------------------------------------- Jason Wang (1): vringh: fix copy direc...

...iggering the copy (CPU or eventually DMA) via a custom MIC API and then publishing the descriptor via vringh_complete_kern(..). Are there any plans of enhancing VRINGH to allow overriding the xfer mechanism in vringh_iov_xfer(..)? This will allow drivers with custom xfer routines to reuse APIs like vringh_iov_push_kern(..) and vringh_iov_pull_kern(..) as well. That said, the existing VRINGH infrastructure is generic enough for our use case as is today. We will post a rev1 of the patch series using VRINGH after some more validation which should automatically address most of your other feedback. Thanks for the rev...

...iggering the copy (CPU or eventually DMA) via a custom MIC API and then publishing the descriptor via vringh_complete_kern(..). Are there any plans of enhancing VRINGH to allow overriding the xfer mechanism in vringh_iov_xfer(..)? This will allow drivers with custom xfer routines to reuse APIs like vringh_iov_push_kern(..) and vringh_iov_pull_kern(..) as well. That said, the existing VRINGH infrastructure is generic enough for our use case as is today. We will post a rev1 of the patch series using VRINGH after some more validation which should automatically address most of your other feedback. Thanks for the rev...

...ma_ops() > - use device_ops to implement the transport API, then it's not a part > of UAPI any more > - use GFP_ATOMIC in mvnet sample device and other tweaks > - set_vring_base/get_vring_base support for mvnet device > > Jason Wang (8): > vringh: fix copy direction of vringh_iov_push_kern() > mdev: class id support > mdev: bus uevent support > modpost: add support for mdev class id > mdev: introduce device specific ops > mdev: introduce virtio device and its device ops > virtio: introduce a mdev based transport > docs: sample driver to demonstrate...

...2 | read = vringh_iov_pull_iotlb(&txq->vring, &txq->iov, | ^~~~~~~~~~~~~~~~~~~~~ | vringh_iov_pull_kern >> drivers/vdpa/vdpa_sim/vdpa_sim.c:168:12: error: implicit declaration of function 'vringh_iov_push_iotlb'; did you mean 'vringh_iov_push_kern'? [-Werror=implicit-function-declaration] 168 | write = vringh_iov_push_iotlb(&rxq->vring, &rxq->iov, | ^~~~~~~~~~~~~~~~~~~~~ | vringh_iov_push_kern drivers/vdpa/vdpa_sim/vdpa_sim.c: In function 'vdpasim_create': >>...

...mvnet sample device and other tweaks - set_vring_base/get_vring_base support for mvnet device Jason Wang (6): mdev: class id support mdev: introduce device specific ops mdev: introduce virtio device and its device ops virtio: introudce a mdev based transport vringh: fix copy direction of vringh_iov_push_kern() docs: Sample driver to demonstrate how to implement virtio-mdev framework .../driver-api/vfio-mediated-device.rst | 11 +- drivers/gpu/drm/i915/gvt/kvmgt.c | 17 +- drivers/s390/cio/vfio_ccw_ops.c | 17 +- drivers/s390/crypto/vfio_ap_ops.c |...

...addressed by inventing new parent_ops. - For quick POC, mdev transport was just derived from virtio-MMIO, I'm pretty sure it has lots of space to be optimized, please share your thought. Please review. [1] https://lkml.org/lkml/2019/8/28/35 Jason Wang (4): vringh: fix copy direction of vringh_iov_push_kern() mdev: introduce helper to set per device dma ops virtio: introudce a mdev based transport docs: Sample driver to demonstrate how to implement virtio-mdev framework drivers/vfio/mdev/Kconfig | 7 + drivers/vfio/mdev/Makefile | 1 + drivers/vfio/mdev/mdev_core.c |...

...as we consume) + * @dst: the place to copy. + * @len: the maximum length to copy. + * + * Returns the bytes copied <= len or a negative errno. + */ +ssize_t vringh_iov_pull_kern(struct vringh_iov *riov, void *dst, size_t len) +{ + return vringh_iov_xfer(riov, dst, len, xfer_kern); +} + +/** + * vringh_iov_push_kern - copy bytes into vring_iov. + * @wiov: the wiov as passed to vringh_getdesc_kern() (updated as we consume) + * @dst: the place to copy. + * @len: the maximum length to copy. + * + * Returns the bytes copied <= len or a negative errno. + */ +ssize_t vringh_iov_push_kern(struct vringh_iov *wiov,...

...as we consume) + * @dst: the place to copy. + * @len: the maximum length to copy. + * + * Returns the bytes copied <= len or a negative errno. + */ +ssize_t vringh_iov_pull_kern(struct vringh_iov *riov, void *dst, size_t len) +{ + return vringh_iov_xfer(riov, dst, len, xfer_kern); +} + +/** + * vringh_iov_push_kern - copy bytes into vring_iov. + * @wiov: the wiov as passed to vringh_getdesc_kern() (updated as we consume) + * @dst: the place to copy. + * @len: the maximum length to copy. + * + * Returns the bytes copied <= len or a negative errno. + */ +ssize_t vringh_iov_push_kern(struct vringh_iov *wiov,...

...mvnet sample device and other tweaks - set_vring_base/get_vring_base support for mvnet device Jason Wang (6): mdev: class id support mdev: introduce device specific ops mdev: introduce virtio device and its device ops virtio: introduce a mdev based transport vringh: fix copy direction of vringh_iov_push_kern() docs: sample driver to demonstrate how to implement virtio-mdev framework .../driver-api/vfio-mediated-device.rst | 11 +- MAINTAINERS | 3 + drivers/gpu/drm/i915/gvt/kvmgt.c | 17 +- drivers/s390/cio/vfio_ccw_ops.c |...

...mvnet sample device and other tweaks - set_vring_base/get_vring_base support for mvnet device Jason Wang (6): mdev: class id support mdev: introduce device specific ops mdev: introduce virtio device and its device ops virtio: introduce a mdev based transport vringh: fix copy direction of vringh_iov_push_kern() docs: sample driver to demonstrate how to implement virtio-mdev framework .../driver-api/vfio-mediated-device.rst | 11 +- MAINTAINERS | 3 + drivers/gpu/drm/i915/gvt/kvmgt.c | 17 +- drivers/s390/cio/vfio_ccw_ops.c |...