Date: Sun, 3 Aug 2025 10:43:20 +1000 From: Peter Jeremy <peterj@freebsd.org> To: FreeBSD-arm@freebsd.org, FreeBSD-net@freebsd.org Subject: Technical documentation for Synopsys Ethernet QoS Controller (eqos) Message-ID: <aI6wqPnSobOlh3E6@server.rulingia.com>
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[-- Attachment #1 --] I'm trying to extend eqos(4) to support more of the controller's functionality: Checksum offload and ideally TCP offload. I have "Rockchip RK3568 TRM Part2 V1.1-20210301.pdf" but that's missing documentation on the DMA interface and there are some discrepancies between it and the existing FreeBSD code. Some specific questions: * The existing code supports Synopsys versions 0x51 and 0x52. The RK3566 (and, based on the above TRM, RK3568) are version 0x51. Does anyone know what chips have version 0x52? * Is anyone aware of errata regarding the controller's support of checksum offload or TCP offload? * Does anyone have documentation on the actual configuration of the DMA registers? I notice the eqos(4) code initialises the ring buffer length to 1 less than the number of ring buffers but there's no mention of this in the TRM I have. I've had a quick look at NetBSD and OpenBSD. The latter doesn't appear to have an eqos driver and the former doesn't seem to support any functionality that FreeBSD doesn't. -- Peter Jeremy [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEE7rKYbDBnHnTmXCJ+FqWXoOSiCzQFAmiOsKFfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEVF QjI5ODZDMzA2NzFFNzRFNjVDMjI3RTE2QTU5N0EwRTRBMjBCMzQACgkQFqWXoOSi CzRCsw//RdpgAfCnxyHsovtHCLruglAuuxIIFWKEaGRRV6UcdvO0/LOxrJskq/k3 cfghdl65xi5HdCLm5a/JNhR/172R6yUAdlzsne2ROGgSQr1/hbRHFl7Qftle+hGl GEmQ+WChTKDcswuenJJkAFMPRMa1AvIR5JA7Kg6okPXlYiTz3WCc5vsYr+FQkVIH 9hIdf/sbdy/aAlI5RXQHOzpLdxLu+0c9RPlR/TPa2CwJma37iuQ9lAtp+Q8iKhvm Bwo4klru26LslJcdhA95dfP8nA4mskvZBaNcqxOXzUIiymcUSkAniaDsL4kUPZmx gt/UTAEoeUpDfBWoJEf7UXCVwmowYXoTR2Yrm6uuABm15Di7PpmoW/tdwmRSlSwL 8J8dI590LlmwnlziI2lvH0bzslCg55T7JSVDrsDdY3OuQJaeUvGD42zfRt3yR5yG g8e49mHAAX1qrJ7M1Mc0RKdDhigGJJiaZXFj87xRGfrZiQ81eF1mFj+e8bRNOIj3 l5pBOh57N2zHSNlp1JsI2aY+N8U2gBG2YkRKJwk+YrNHO8lDqCcNkRUAuSQ0P+Tx e7VsFaY4+7DQNlRC89hX02xaq7PBdYbujCbKQUyOiJvkDJqPecB/+L08hL3t5YFO wghjGe5FwFhELqjGLUidypyG2K3DBd8Cy1d2YDusj4tjPIXZHWQ= =7IhP -----END PGP SIGNATURE-----
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