From: Brett Creeley <brett.creeley@amd.com>
To: <kvm@vger.kernel.org>, <netdev@vger.kernel.org>,
<alex.williamson@redhat.com>, <jgg@nvidia.com>,
<yishaih@nvidia.com>, <shameerali.kolothum.thodi@huawei.com>,
<kevin.tian@intel.com>
Cc: <brett.creeley@amd.com>, <shannon.nelson@amd.com>,
<drivers@pensando.io>, <simon.horman@corigine.com>
Subject: [PATCH v8 vfio 0/7] pds_vfio driver
Date: Tue, 4 Apr 2023 12:01:34 -0700 [thread overview]
Message-ID: <20230404190141.57762-1-brett.creeley@amd.com> (raw)
This is a patchset for a new vendor specific VFIO driver
(pds_vfio) for use with the AMD/Pensando Distributed Services Card
(DSC). This driver makes use of the newly introduced pds_core
driver, which the latest version can be referenced at:
https://lore.kernel.org/netdev/20230330234628.14627-1-shannon.nelson@amd.com/
This driver will use the pds_core device's adminq as the VFIO
control path to the DSC. In order to make adminq calls, the VFIO
instance makes use of functions exported by the pds_core driver.
In order to receive events from pds_core, the pds_vfio driver
registers to a private notifier. This is needed for various events
that come from the device.
An ASCII diagram of a VFIO instance looks something like this and can
be used with the VFIO subsystem to provide the VF device VFIO and live
migration support.
.------. .-----------------------.
| QEMU |--| VM .-------------. |
'......' | | Eth VF | |
| | .-------------. |
| | | SR-IOV VF | |
| | '-------------' |
| '------------||---------'
.--------------. ||
|/dev/<vfio_fd>| ||
'--------------' ||
Host Userspace | ||
=================================================== ||
Host Kernel | ||
.--------. ||
|vfio-pci| ||
'--------' ||
.------------------. || ||
| | exported API |<----+ || ||
| '--------------| | || ||
| | .-------------. ||
| pds_core |--->| pds_vfio | ||
'------------------' | '-------------' ||
|| | || ||
09:00.0 notifier 09:00.1 ||
== PCI ===============================================||=====
|| || ||
.----------. .----------. ||
,-----| PF |----------| VF |-------------------,
| '----------' '----------' | VF |
| DSC | data/control |
| | path |
-----------------------------------------------------------
The pds_vfio driver is targeted to reside in drivers/vfio/pci/pds.
It makes use of and introduces new files in the common include/linux/pds
include directory.
Changes:
v8:
- provide default iommufd callbacks for bind_iommufd, unbind_iommufd, and
attach_ioas for the VFIO device as suggested by Shameerali Kolothum
Thodi.
v7:
https://lore.kernel.org/netdev/20230331003612.17569-1-brett.creeley@amd.com/
- Disable and clean up dirty page tracking when the VFIO device is closed
- Various improvements suggested by Simon Horman:
- Fix RCT in vfio_combine_iova_ranges()
- Simplify function exit paths by removing unnecessary goto
labels
- Cleanup pds_vifo_print_guest_region_info() by adding a goto
label for freeing memory, which allowed for reduced
indentation on a for loop
- Where possible use C99 style for loops
v6:
https://lore.kernel.org/netdev/20230327200553.13951-1-brett.creeley@amd.com/
- As suggested by Alex Williamson, use pci_domain_nr() macro to make sure
the pds_vfio client's devname is unique
- Remove unnecessary forward declaration and include
- Fix copyright comment to use correct company name
- Remove "." from struct documentation for consistency
v5:
https://lore.kernel.org/netdev/20230322203442.56169-1-brett.creeley@amd.com/
- Fix SPDX comments in .h files
- Remove adminqcq argument from pdsc_post_adminq() uses
- Unregister client on vfio_pci_core_register_device() failure
- Other minor checkpatch issues
v4:
https://lore.kernel.org/netdev/20230308052450.13421-1-brett.creeley@amd.com/
- Update cover letter ASCII diagram to reflect new driver architecture
- Remove auxiliary driver implementation
- Use pds_core's exported functions to communicate with the device
- Implement and register notifier for events from the device/pds_core
- Use module_pci_driver() macro since auxiliary driver configuration is
no longer needed in __init/__exit
v3:
https://lore.kernel.org/netdev/20230219083908.40013-1-brett.creeley@amd.com/
- Update copyright year to 2023 and use "Advanced Micro Devices, Inc."
for the company name
- Clarify the fact that AMD/Pensando's VFIO solution is device type
agnostic, which aligns with other current VFIO solutions
- Add line in drivers/vfio/pci/Makefile to build pds_vfio
- Move documentation to amd sub-directory
- Remove some dead code due to the pds_core implementation of
listening to BIND/UNBIND events
- Move a dev_dbg() to a previous patch in the series
- Add implementation for vfio_migration_ops.migration_get_data_size to
return the maximum possible device state size
RFC to v2:
https://lore.kernel.org/all/20221214232136.64220-1-brett.creeley@amd.com/
- Implement state transitions for VFIO_MIGRATION_P2P flag
- Improve auxiliary driver probe by returning EPROBE_DEFER
when the PCI driver is not set up correctly
- Add pointer to docs in
Documentation/networking/device_drivers/ethernet/index.rst
RFC:
https://lore.kernel.org/all/20221207010705.35128-1-brett.creeley@amd.com/
Brett Creeley (7):
vfio: Commonize combine_ranges for use in other VFIO drivers
vfio/pds: Initial support for pds_vfio VFIO driver
vfio/pds: register with the pds_core PF
vfio/pds: Add VFIO live migration support
vfio/pds: Add support for dirty page tracking
vfio/pds: Add support for firmware recovery
vfio/pds: Add Kconfig and documentation
.../device_drivers/ethernet/amd/pds_vfio.rst | 79 +++
.../device_drivers/ethernet/index.rst | 1 +
MAINTAINERS | 7 +
drivers/vfio/pci/Kconfig | 2 +
drivers/vfio/pci/Makefile | 2 +
drivers/vfio/pci/mlx5/cmd.c | 48 +-
drivers/vfio/pci/pds/Kconfig | 20 +
drivers/vfio/pci/pds/Makefile | 11 +
drivers/vfio/pci/pds/cmds.c | 530 +++++++++++++++++
drivers/vfio/pci/pds/cmds.h | 25 +
drivers/vfio/pci/pds/dirty.c | 536 ++++++++++++++++++
drivers/vfio/pci/pds/dirty.h | 45 ++
drivers/vfio/pci/pds/lm.c | 478 ++++++++++++++++
drivers/vfio/pci/pds/lm.h | 52 ++
drivers/vfio/pci/pds/pci_drv.c | 212 +++++++
drivers/vfio/pci/pds/pci_drv.h | 9 +
drivers/vfio/pci/pds/vfio_dev.c | 239 ++++++++
drivers/vfio/pci/pds/vfio_dev.h | 40 ++
drivers/vfio/vfio_main.c | 47 ++
include/linux/pds/pds_lm.h | 389 +++++++++++++
include/linux/vfio.h | 3 +
21 files changed, 2728 insertions(+), 47 deletions(-)
create mode 100644 Documentation/networking/device_drivers/ethernet/amd/pds_vfio.rst
create mode 100644 drivers/vfio/pci/pds/Kconfig
create mode 100644 drivers/vfio/pci/pds/Makefile
create mode 100644 drivers/vfio/pci/pds/cmds.c
create mode 100644 drivers/vfio/pci/pds/cmds.h
create mode 100644 drivers/vfio/pci/pds/dirty.c
create mode 100644 drivers/vfio/pci/pds/dirty.h
create mode 100644 drivers/vfio/pci/pds/lm.c
create mode 100644 drivers/vfio/pci/pds/lm.h
create mode 100644 drivers/vfio/pci/pds/pci_drv.c
create mode 100644 drivers/vfio/pci/pds/pci_drv.h
create mode 100644 drivers/vfio/pci/pds/vfio_dev.c
create mode 100644 drivers/vfio/pci/pds/vfio_dev.h
create mode 100644 include/linux/pds/pds_lm.h
--
2.17.1
next reply other threads:[~2023-04-04 19:02 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-04 19:01 Brett Creeley [this message]
2023-04-04 19:01 ` [PATCH v8 vfio 1/7] vfio: Commonize combine_ranges for use in other VFIO drivers Brett Creeley
2023-04-14 12:31 ` Jason Gunthorpe
2023-04-04 19:01 ` [PATCH v8 vfio 2/7] vfio/pds: Initial support for pds_vfio VFIO driver Brett Creeley
2023-04-04 19:01 ` [PATCH v8 vfio 3/7] vfio/pds: register with the pds_core PF Brett Creeley
2023-04-10 20:41 ` Alex Williamson
2023-04-11 17:09 ` Brett Creeley
2023-04-14 12:43 ` Jason Gunthorpe
2023-04-17 18:42 ` Shannon Nelson
2023-04-21 0:42 ` Brett Creeley
2023-04-04 19:01 ` [PATCH v8 vfio 4/7] vfio/pds: Add VFIO live migration support Brett Creeley
2023-04-10 22:05 ` Alex Williamson
2023-04-11 17:21 ` Brett Creeley
2023-04-14 12:52 ` Jason Gunthorpe
2023-04-04 19:01 ` [PATCH v8 vfio 5/7] vfio/pds: Add support for dirty page tracking Brett Creeley
2023-04-10 22:15 ` Alex Williamson
2023-04-04 19:01 ` [PATCH v8 vfio 6/7] vfio/pds: Add support for firmware recovery Brett Creeley
2023-04-14 12:56 ` Jason Gunthorpe
2023-04-04 19:01 ` [PATCH v8 vfio 7/7] vfio/pds: Add Kconfig and documentation Brett Creeley
2023-04-14 12:57 ` Jason Gunthorpe
2023-04-04 19:03 ` [PATCH v8 vfio 0/7] pds_vfio driver Jason Gunthorpe
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