lkml.org 
[lkml]   [2020]   [Jul]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: [RFC PATCH 00/22] Enhance VHOST to enable SoC-to-SoC communication
    From
    Date
    +Alan, Haotian

    On 7/2/2020 11:01 PM, Mathieu Poirier wrote:
    > On Thu, 2 Jul 2020 at 03:51, Michael S. Tsirkin <mst@redhat.com> wrote:
    >>
    >> On Thu, Jul 02, 2020 at 01:51:21PM +0530, Kishon Vijay Abraham I wrote:
    >>> This series enhances Linux Vhost support to enable SoC-to-SoC
    >>> communication over MMIO. This series enables rpmsg communication between
    >>> two SoCs using both PCIe RC<->EP and HOST1-NTB-HOST2
    >>>
    >>> 1) Modify vhost to use standard Linux driver model
    >>> 2) Add support in vring to access virtqueue over MMIO
    >>> 3) Add vhost client driver for rpmsg
    >>> 4) Add PCIe RC driver (uses virtio) and PCIe EP driver (uses vhost) for
    >>> rpmsg communication between two SoCs connected to each other
    >>> 5) Add NTB Virtio driver and NTB Vhost driver for rpmsg communication
    >>> between two SoCs connected via NTB
    >>> 6) Add configfs to configure the components
    >>>
    >>> UseCase1 :
    >>>
    >>> VHOST RPMSG VIRTIO RPMSG
    >>> + +
    >>> | |
    >>> | |
    >>> | |
    >>> | |
    >>> +-----v------+ +------v-------+
    >>> | Linux | | Linux |
    >>> | Endpoint | | Root Complex |
    >>> | <-----------------> |
    >>> | | | |
    >>> | SOC1 | | SOC2 |
    >>> +------------+ +--------------+
    >>>
    >>> UseCase 2:
    >>>
    >>> VHOST RPMSG VIRTIO RPMSG
    >>> + +
    >>> | |
    >>> | |
    >>> | |
    >>> | |
    >>> +------v------+ +------v------+
    >>> | | | |
    >>> | HOST1 | | HOST2 |
    >>> | | | |
    >>> +------^------+ +------^------+
    >>> | |
    >>> | |
    >>> +---------------------------------------------------------------------+
    >>> | +------v------+ +------v------+ |
    >>> | | | | | |
    >>> | | EP | | EP | |
    >>> | | CONTROLLER1 | | CONTROLLER2 | |
    >>> | | <-----------------------------------> | |
    >>> | | | | | |
    >>> | | | | | |
    >>> | | | SoC With Multiple EP Instances | | |
    >>> | | | (Configured using NTB Function) | | |
    >>> | +-------------+ +-------------+ |
    >>> +---------------------------------------------------------------------+
    >>>
    >>> Software Layering:
    >>>
    >>> The high-level SW layering should look something like below. This series
    >>> adds support only for RPMSG VHOST, however something similar should be
    >>> done for net and scsi. With that any vhost device (PCI, NTB, Platform
    >>> device, user) can use any of the vhost client driver.
    >>>
    >>>
    >>> +----------------+ +-----------+ +------------+ +----------+
    >>> | RPMSG VHOST | | NET VHOST | | SCSI VHOST | | X |
    >>> +-------^--------+ +-----^-----+ +-----^------+ +----^-----+
    >>> | | | |
    >>> | | | |
    >>> | | | |
    >>> +-----------v-----------------v--------------v--------------v----------+
    >>> | VHOST CORE |
    >>> +--------^---------------^--------------------^------------------^-----+
    >>> | | | |
    >>> | | | |
    >>> | | | |
    >>> +--------v-------+ +----v------+ +----------v----------+ +----v-----+
    >>> | PCI EPF VHOST | | NTB VHOST | |PLATFORM DEVICE VHOST| | X |
    >>> +----------------+ +-----------+ +---------------------+ +----------+
    >>>
    >>> This was initially proposed here [1]
    >>>
    >>> [1] -> https://lore.kernel.org/r/2cf00ec4-1ed6-f66e-6897-006d1a5b6390@ti.com
    >>
    >>
    >> I find this very interesting. A huge patchset so will take a bit
    >> to review, but I certainly plan to do that. Thanks!
    >
    > Same here - it will take time. This patchset is sizable and sits
    > behind a few others that are equally big.
    >
    >>
    >>>
    >>> Kishon Vijay Abraham I (22):
    >>> vhost: Make _feature_ bits a property of vhost device
    >>> vhost: Introduce standard Linux driver model in VHOST
    >>> vhost: Add ops for the VHOST driver to configure VHOST device
    >>> vringh: Add helpers to access vring in MMIO
    >>> vhost: Add MMIO helpers for operations on vhost virtqueue
    >>> vhost: Introduce configfs entry for configuring VHOST
    >>> virtio_pci: Use request_threaded_irq() instead of request_irq()
    >>> rpmsg: virtio_rpmsg_bus: Disable receive virtqueue callback when
    >>> reading messages
    >>> rpmsg: Introduce configfs entry for configuring rpmsg
    >>> rpmsg: virtio_rpmsg_bus: Add Address Service Notification support
    >>> rpmsg: virtio_rpmsg_bus: Move generic rpmsg structure to
    >>> rpmsg_internal.h
    >>> virtio: Add ops to allocate and free buffer
    >>> rpmsg: virtio_rpmsg_bus: Use virtio_alloc_buffer() and
    >>> virtio_free_buffer()
    >>> rpmsg: Add VHOST based remote processor messaging bus
    >>> samples/rpmsg: Setup delayed work to send message
    >>> samples/rpmsg: Wait for address to be bound to rpdev for sending
    >>> message
    >>> rpmsg.txt: Add Documentation to configure rpmsg using configfs
    >>> virtio_pci: Add VIRTIO driver for VHOST on Configurable PCIe Endpoint
    >>> device
    >>> PCI: endpoint: Add EP function driver to provide VHOST interface
    >>> NTB: Add a new NTB client driver to implement VIRTIO functionality
    >>> NTB: Add a new NTB client driver to implement VHOST functionality
    >>> NTB: Describe the ntb_virtio and ntb_vhost client in the documentation
    >>>
    >>> Documentation/driver-api/ntb.rst | 11 +
    >>> Documentation/rpmsg.txt | 56 +
    >>> drivers/ntb/Kconfig | 18 +
    >>> drivers/ntb/Makefile | 2 +
    >>> drivers/ntb/ntb_vhost.c | 776 +++++++++++
    >>> drivers/ntb/ntb_virtio.c | 853 ++++++++++++
    >>> drivers/ntb/ntb_virtio.h | 56 +
    >>> drivers/pci/endpoint/functions/Kconfig | 11 +
    >>> drivers/pci/endpoint/functions/Makefile | 1 +
    >>> .../pci/endpoint/functions/pci-epf-vhost.c | 1144 ++++++++++++++++
    >>> drivers/rpmsg/Kconfig | 10 +
    >>> drivers/rpmsg/Makefile | 3 +-
    >>> drivers/rpmsg/rpmsg_cfs.c | 394 ++++++
    >>> drivers/rpmsg/rpmsg_core.c | 7 +
    >>> drivers/rpmsg/rpmsg_internal.h | 136 ++
    >>> drivers/rpmsg/vhost_rpmsg_bus.c | 1151 +++++++++++++++++
    >>> drivers/rpmsg/virtio_rpmsg_bus.c | 184 ++-
    >>> drivers/vhost/Kconfig | 1 +
    >>> drivers/vhost/Makefile | 2 +-
    >>> drivers/vhost/net.c | 10 +-
    >>> drivers/vhost/scsi.c | 24 +-
    >>> drivers/vhost/test.c | 17 +-
    >>> drivers/vhost/vdpa.c | 2 +-
    >>> drivers/vhost/vhost.c | 730 ++++++++++-
    >>> drivers/vhost/vhost_cfs.c | 341 +++++
    >>> drivers/vhost/vringh.c | 332 +++++
    >>> drivers/vhost/vsock.c | 20 +-
    >>> drivers/virtio/Kconfig | 9 +
    >>> drivers/virtio/Makefile | 1 +
    >>> drivers/virtio/virtio_pci_common.c | 25 +-
    >>> drivers/virtio/virtio_pci_epf.c | 670 ++++++++++
    >>> include/linux/mod_devicetable.h | 6 +
    >>> include/linux/rpmsg.h | 6 +
    >>> {drivers/vhost => include/linux}/vhost.h | 132 +-
    >>> include/linux/virtio.h | 3 +
    >>> include/linux/virtio_config.h | 42 +
    >>> include/linux/vringh.h | 46 +
    >>> samples/rpmsg/rpmsg_client_sample.c | 32 +-
    >>> tools/virtio/virtio_test.c | 2 +-
    >>> 39 files changed, 7083 insertions(+), 183 deletions(-)
    >>> create mode 100644 drivers/ntb/ntb_vhost.c
    >>> create mode 100644 drivers/ntb/ntb_virtio.c
    >>> create mode 100644 drivers/ntb/ntb_virtio.h
    >>> create mode 100644 drivers/pci/endpoint/functions/pci-epf-vhost.c
    >>> create mode 100644 drivers/rpmsg/rpmsg_cfs.c
    >>> create mode 100644 drivers/rpmsg/vhost_rpmsg_bus.c
    >>> create mode 100644 drivers/vhost/vhost_cfs.c
    >>> create mode 100644 drivers/virtio/virtio_pci_epf.c
    >>> rename {drivers/vhost => include/linux}/vhost.h (66%)
    >>>
    >>> --
    >>> 2.17.1
    >>>
    >>

    \
     
     \ /
      Last update: 2020-07-03 08:19    [W:5.072 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site