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Message-ID: <56c4fccd-787f-4936-9f4b-a1b9ebae6d03@redhat.com> Date: Tue, 10 Sep 2024 13:29:34 +0200 From: Paolo Abeni <pabeni@...hat.com> To: fancer.lancer@...il.com Cc: alexandre.torgue@...s.st.com, joabreu@...opsys.com, davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, mcoquelin.stm32@...il.com, bcm-kernel-feedback-list@...adcom.com, richardcochran@...il.com, ast@...nel.org, daniel@...earbox.net, hawk@...nel.org, john.fastabend@...il.com, rmk+kernel@...linux.org.uk, ahalaney@...hat.com, xiaolei.wang@...driver.com, rohan.g.thomas@...el.com, Jianheng.Zhang@...opsys.com, linux-kernel@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com, linux-arm-kernel@...ts.infradead.org, bpf@...r.kernel.org, andrew@...n.ch, linux@...linux.org.uk, horms@...nel.org, florian.fainelli@...adcom.com, jitendra.vegiraju@...adcom.com, netdev@...r.kernel.org Subject: Re: [net-next v5 0/5] net: stmmac: Add PCI driver support for BCM8958x On 9/4/24 07:48, jitendra.vegiraju@...adcom.com wrote: > From: Jitendra Vegiraju <jitendra.vegiraju@...adcom.com> > > This patchset adds basic PCI ethernet device driver support for Broadcom > BCM8958x Automotive Ethernet switch SoC devices. > > This SoC device has PCIe ethernet MAC attached to an integrated ethernet > switch using XGMII interface. The PCIe ethernet controller is presented to > the Linux host as PCI network device. > > The following block diagram gives an overview of the application. > +=================================+ > | Host CPU/Linux | > +=================================+ > || PCIe > || > +==========================================+ > | +--------------+ | > | | PCIE Endpoint| | > | | Ethernet | | > | | Controller | | > | | DMA | | > | +--------------+ | > | | MAC | BCM8958X | > | +--------------+ SoC | > | || XGMII | > | || | > | +--------------+ | > | | Ethernet | | > | | switch | | > | +--------------+ | > | || || || || | > +==========================================+ > || || || || More external interfaces > > The MAC block on BCM8958x is based on Synopsis XGMAC 4.00a core. This > MAC IP introduces new DMA architecture called Hyper-DMA for virtualization > scalability. > > Driver functionality specific to new MAC (DW25GMAC) is implemented in > new file dw25gmac.c. > > Management of integrated ethernet switch on this SoC is not handled by > the PCIe interface. > This SoC device has PCIe ethernet MAC directly attached to an integrated > ethernet switch using XGMII interface. > > v4->v5: > Summary of changes in this patch series: > As suggested by Serge Semin, defined common setup function for dw25gmac. > To accommodate early adopter DW25GMAC used in BCM8958x device, provide > a mechanism to override snps_id and snps_dev_id used for driver entry > matching in hwif.c > > Patch1: > Added plat_stmmacenet_data::snps_id,snps_dev_id fields - Serge Semin > Patch2: > Define common setup function for dw25gmac_setup() - Serge Semin > Support DW25GMAC IPs with varying VDMA/PDMA count - Abhishek Chauhan > Allocate and initialize hdma mapping configuration data dynamically > based on device's VDMA/PDMA feature capabilities in dw25gmac_setup(). > Spelling errors in commit log, lower case 0x for hex -Amit Singh Tomar > Patch3: > Glue support in hwif.c for DW25GMAC in hwif.c - Serge Semin > Provide an option to override snps_id and snps_dev_id when the device > reports version info not conformant with driver's expectations as is > the case with BCM8958x device. - Serge Semin > Patch4: > Remove setup function in the glue driver - Serge Semin > Remove unnecessary calls pci_enable_device() and pci_set_master() > in dwxgmac_brcm_pci_resume() - Jakub Kicinski > Merge variable definitions to single line - Amit Singh Tomar > > v3->v4: > Based on Serge's questions, received a confirmation from Synopsys that > the MAC IP is indeed the new 25GMAC design. > Renamed all references of XGMAC4 to 25GMAC. > The patch series is rearranged slightly as follows. > Patch1 (new): Define HDMA mapping data structure in kernel's stmmac.h > Patch2 (v3 Patch1): Adds dma_ops for dw25gmac in stmmac core > Renamed new files dwxgmac4.* to dw25gmac.* - Serge Semin > Defined new Synopsis version and device id macros for DW25GMAC. > Converted bit operations to FIELD_PREP macros - Russell King > Moved hwif.h to this patch, Sparse flagged warning - Simon Horman > Defined macros for hardcoded values TDPS etc - Serge Semin > Read number of PDMAs/VDMAs from hardware - Serge Semin > Patch3 (v3 Patch2): Hooks in hardware interface handling for dw25gmac > Resolved user_version quirks questions - Serge, Russell, Andrew > Added new stmmac_hw entry for DW25GMAC. - Serge > Added logic to override synopsis_dev_id by glue driver. > Patch4 (v3 Patch3): Adds PCI driver for BCM8958x device > Define bitmmap macros for hardcoded values - Andrew Lunn > Added per device software node - Andrew Lunn > Patch5(new/split): Adds BCM8958x driver to build system > https://lore.kernel.org/netdev/20240814221818.2612484-1-jitendra.vegiraju@broadcom.com/ > > v2->v3: > Addressed v2 comments from Andrew, Jakub, Russel and Simon. > Based on suggestion by Russel and Andrew, added software node to create > phylink in fixed-link mode. > Moved dwxgmac4 specific functions to new files dwxgmac4.c and dwxgmac4.h > in stmmac core module. > Reorganized the code to use the existing glue logic support for xgmac in > hwif.c and override ops functions for dwxgmac4 specific functions. > The patch is split into three parts. > Patch#1 Adds dma_ops for dwxgmac4 in stmmac core > Patch#2 Hooks in the hardware interface handling for dwxgmac4 > Patch#3 Adds PCI driver for BCM8958x device > https://lore.kernel.org/netdev/20240802031822.1862030-1-jitendra.vegiraju@broadcom.com/ > > v1->v2: > Minor fixes to address coding style issues. > Sent v2 too soon by mistake, without waiting for review comments. > Received feedback on this version. > https://lore.kernel.org/netdev/20240511015924.41457-1-jitendra.vegiraju@broadcom.com/ > > v1: > https://lore.kernel.org/netdev/20240510000331.154486-1-jitendra.vegiraju@broadcom.com/ > > Jitendra Vegiraju (5): > Add HDMA mapping for dw25gmac support > Add basic dw25gmac support in stmmac core > Integrate dw25gmac into stmmac hwif handling > Add PCI driver support for BCM8958x > Add BCM8958x driver to build system > > MAINTAINERS | 8 + > drivers/net/ethernet/stmicro/stmmac/Kconfig | 11 + > drivers/net/ethernet/stmicro/stmmac/Makefile | 3 +- > drivers/net/ethernet/stmicro/stmmac/common.h | 4 + > .../net/ethernet/stmicro/stmmac/dw25gmac.c | 224 ++++++++ > .../net/ethernet/stmicro/stmmac/dw25gmac.h | 92 ++++ > .../net/ethernet/stmicro/stmmac/dwmac-brcm.c | 507 ++++++++++++++++++ > .../net/ethernet/stmicro/stmmac/dwxgmac2.h | 1 + > .../ethernet/stmicro/stmmac/dwxgmac2_core.c | 43 ++ > .../ethernet/stmicro/stmmac/dwxgmac2_dma.c | 31 ++ > drivers/net/ethernet/stmicro/stmmac/hwif.c | 26 +- > drivers/net/ethernet/stmicro/stmmac/hwif.h | 1 + > include/linux/stmmac.h | 48 ++ > 13 files changed, 997 insertions(+), 2 deletions(-) > create mode 100644 drivers/net/ethernet/stmicro/stmmac/dw25gmac.c > create mode 100644 drivers/net/ethernet/stmicro/stmmac/dw25gmac.h > create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-brcm.c Hi Serge, to you think you will have time to review this series soon? We are sort in a rush to flush the net-next material before the upcoming merge window. Thanks, Paolo
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