linux-kernel - [PATCH v2 0/4] soc: marvell: Add a general purpose RVU physical

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Message-ID: <20241001104948.2779665-1-agaur@marvell.com>
Date: Tue, 1 Oct 2024 16:19:44 +0530
From: Anshumali Gaur <agaur@...vell.com>
To: <conor.dooley@...rochip.com>, <ulf.hansson@...aro.org>, <arnd@...db.de>,
        <linus.walleij@...aro.org>, <nikita.shubin@...uefel.me>,
        <alexander.sverdlin@...il.com>, <vkoul@...nel.org>, <cyy@...self.name>,
        <krzysztof.kozlowski@...aro.org>, <linux-kernel@...r.kernel.org>,
        <sgoutham@...vell.com>
CC: Anshumali Gaur <agaur@...vell.com>
Subject: [PATCH v2 0/4] soc: marvell: Add a general purpose RVU physical

Resource virtualization unit (RVU) on Marvell's Octeon series of
silicons maps HW resources from the network, crypto and other functional
blocks into PCI-compatible physical and virtual functions. Each
functional block again has multiple local functions (LFs) for
provisioning to PCI devices. RVU supports multiple PCIe SRIOV physical
functions (PFs) and virtual functions (VFs). And RVU admin function (AF)
is the one which manages all the resources (local functions etc) in the
system.

Functionality of these PFs and VFs depends on which block LFs are
attached to them. Depending on usecase some PFs might support IO (ie LFs
attached) and some may not. For the usecases where PF doesn't (need to)
support IO, PF's driver will be limited to below functionality.

1. Creating and destroying of PCIe SRIOV VFs
2. Support mailbox communication between VFs and admin function
(RVU AF)
3. PCIe Function level reset (FLR) for VFs

For such PFs, this patch series adds a general purpose driver which
supports above functionality.  This will avoid duplicating same
functionality for different RVU PFs.

Next generation of Octeon silicon will have many new RVU blocks added.
Eg: ML, Octeon (connected as an EP card) to host network packet path etc
For such functionality there could be only userspace VF drivers hence
a generic PF driver in Kernel is needed to support these VF drivers.

For reference
RVU AF driver is at drivers/net/ethernet/marvell/octeontx2/af/

Example RVU PF drivers
drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
drivers/crypto/marvell/octeontx2/otx2_cptpf_main.c

Example RVU VF drivers
drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
drivers/crypto/marvell/octeontx2/otx2_cptvf_main.c

Patch-1: This patch adds a generic PF driver with probe() and sriov()
capabilities.
Patch-2: This patch adds PF-AF mailbox support to the generic PF driver.
Patch-3: This patch adds PF-VF mailbox support to the generic PF driver.
Patch-4: This patch adds FLR handler to the generic PF driver.

Changes:
v2:
- Patch-1: Fixed indentation issues pointed out by Alexander Sverdlin
- Patch-4: In function rvu_gen_pf_flr_handler, added ~RVU_PFVF_FUNC_MASK 
  pointed out by Alexander Sverdlin

Anshumali Gaur (4):
  soc: marvell: Add a general purpose RVU PF driver
  soc: marvell: rvu-pf: Add PF to AF mailbox communication support.
  soc: marvell: rvu-pf: Add mailbox communication btw RVU VFs and PF.
  soc: marvell: rvu-pf: Handle function level reset (FLR) IRQs for VFs

 drivers/soc/Kconfig                     |    1 +
 drivers/soc/Makefile                    |    1 +
 drivers/soc/marvell/Kconfig             |   19 +
 drivers/soc/marvell/Makefile            |    2 +
 drivers/soc/marvell/rvu_gen_pf/Makefile |    5 +
 drivers/soc/marvell/rvu_gen_pf/gen_pf.c | 1087 +++++++++++++++++++++++
 drivers/soc/marvell/rvu_gen_pf/gen_pf.h |  152 ++++
 7 files changed, 1267 insertions(+)
 create mode 100644 drivers/soc/marvell/Kconfig
 create mode 100644 drivers/soc/marvell/Makefile
 create mode 100644 drivers/soc/marvell/rvu_gen_pf/Makefile
 create mode 100644 drivers/soc/marvell/rvu_gen_pf/gen_pf.c
 create mode 100644 drivers/soc/marvell/rvu_gen_pf/gen_pf.h

-- 
2.25.1