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From: "Michael S. Tsirkin" <mst@redhat.com>
To: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Ohad Ben-Cohen <ohad@wizery.com>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Jon Mason <jdmason@kudzu.us>, Dave Jiang <dave.jiang@intel.com>,
	Allen Hubbe <allenbh@gmail.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Jason Wang <jasowang@redhat.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Stefan Hajnoczi <stefanha@redhat.com>,
	Stefano Garzarella <sgarzare@redhat.com>,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-remoteproc@vger.kernel.org, linux-ntb@googlegroups.com,
	linux-pci@vger.kernel.org, kvm@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	netdev@vger.kernel.org
Subject: Re: [RFC PATCH 00/22] Enhance VHOST to enable SoC-to-SoC communication
Date: Thu, 2 Jul 2020 05:51:29 -0400	[thread overview]
Message-ID: <20200702055026-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <20200702082143.25259-1-kishon@ti.com>

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!

> 
> 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
> 


  parent reply	other threads:[~2020-07-02  9:51 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-02  8:21 [RFC PATCH 00/22] Enhance VHOST to enable SoC-to-SoC communication Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 01/22] vhost: Make _feature_ bits a property of vhost device Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 02/22] vhost: Introduce standard Linux driver model in VHOST Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 03/22] vhost: Add ops for the VHOST driver to configure VHOST device Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 04/22] vringh: Add helpers to access vring in MMIO Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 05/22] vhost: Add MMIO helpers for operations on vhost virtqueue Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 06/22] vhost: Introduce configfs entry for configuring VHOST Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 07/22] virtio_pci: Use request_threaded_irq() instead of request_irq() Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 08/22] rpmsg: virtio_rpmsg_bus: Disable receive virtqueue callback when reading messages Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 09/22] rpmsg: Introduce configfs entry for configuring rpmsg Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 10/22] rpmsg: virtio_rpmsg_bus: Add Address Service Notification support Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 11/22] rpmsg: virtio_rpmsg_bus: Move generic rpmsg structure to rpmsg_internal.h Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 12/22] virtio: Add ops to allocate and free buffer Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 13/22] rpmsg: virtio_rpmsg_bus: Use virtio_alloc_buffer() and virtio_free_buffer() Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 14/22] rpmsg: Add VHOST based remote processor messaging bus Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 15/22] samples/rpmsg: Setup delayed work to send message Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 16/22] samples/rpmsg: Wait for address to be bound to rpdev for sending message Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 17/22] rpmsg.txt: Add Documentation to configure rpmsg using configfs Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 18/22] virtio_pci: Add VIRTIO driver for VHOST on Configurable PCIe Endpoint device Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 19/22] PCI: endpoint: Add EP function driver to provide VHOST interface Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 20/22] NTB: Add a new NTB client driver to implement VIRTIO functionality Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 21/22] NTB: Add a new NTB client driver to implement VHOST functionality Kishon Vijay Abraham I
2020-07-02  8:21 ` [RFC PATCH 22/22] NTB: Describe ntb_virtio and ntb_vhost client in the documentation Kishon Vijay Abraham I
2020-07-02  9:51 ` Michael S. Tsirkin [this message]
2020-07-02 10:10   ` [RFC PATCH 00/22] Enhance VHOST to enable SoC-to-SoC communication Jason Wang
2020-07-02 13:35     ` Kishon Vijay Abraham I
2020-07-03  7:16       ` Jason Wang
2020-07-06  9:32         ` Kishon Vijay Abraham I
2020-07-07  9:47           ` Jason Wang
2020-07-07 14:45             ` Kishon Vijay Abraham I
2020-07-08 11:22               ` Jason Wang
2020-07-08 13:13                 ` Kishon Vijay Abraham I
2020-07-09  6:26                   ` Jason Wang
2020-08-28 10:34                     ` Cornelia Huck
2020-09-01  5:24                       ` Kishon Vijay Abraham I
2020-09-01  8:50                         ` Jason Wang
2020-09-08 16:37                           ` Cornelia Huck
2020-09-09  8:41                             ` Jason Wang
2020-09-14  7:23                           ` Kishon Vijay Abraham I
2020-09-15  8:18                             ` Jason Wang
2020-09-15 15:47                               ` Kishon Vijay Abraham I
2020-09-16  3:10                                 ` Jason Wang
2020-09-16 11:47                                   ` Kishon Vijay Abraham I
2020-09-16 11:47                                     ` Kishon Vijay Abraham I
2020-09-18  4:04                                     ` Jason Wang
2020-07-15 17:15                   ` Mathieu Poirier
2020-09-01  4:40                     ` Kishon Vijay Abraham I
2020-07-02 10:25   ` Kishon Vijay Abraham I
2020-07-02 17:31   ` Mathieu Poirier
2020-07-03  6:17     ` Kishon Vijay Abraham I

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