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charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [10.10.10.103] X-Mailer: Zimbra 8.8.15_GA_3968 (ZimbraWebClient - GC138 (Linux)/8.8.15_GA_3968) Thread-Topic: RSTP SWITCH support for PRU-ICSSM Ethernet driver Thread-Index: baBJgWRemsOFlllaDdRIwjoAJGMMPQ== X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - server.couthit.com X-AntiAbuse: Original Domain - lists.infradead.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - couthit.com X-Get-Message-Sender-Via: server.couthit.com: authenticated_id: smtp@couthit.com X-Authenticated-Sender: server.couthit.com: smtp@couthit.com X-Source: X-Source-Args: X-Source-Dir: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250926_060914_166963_436CD858 X-CRM114-Status: GOOD ( 10.84 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, > On Thu, Sep 25, 2025 at 07:32:09PM +0530, Parvathi Pudi wrote: >> Hi, >> >> The DUAL-EMAC patch series for Megabit Industrial Communication Sub-system >> (ICSSM), which provides the foundational support for Ethernet functionality >> over PRU-ICSS on the TI SOCs (AM335x, AM437x, and AM57x), was merged into >> net-next recently [1]. >> >> This patch series enhances the PRU-ICSSM Ethernet driver to support >> RSTP SWITCH mode, which has been implemented based on "switchdev" and >> interacts with "mstp daemon" to support Rapid Spanning Tree Protocol >> (RSTP) as well. > > Is there anything in this patchset which is specific to RSTP? In > general, there is no difference between STP and RSTP. STP is generally > done in the kernel as part of the kernel bridge code. RSTP does it in > user space. But the hardware driver does not care if it is STP or > RSTP, it is the same API to the layer above. > > Andrew No, this patch-set applies to both STP and RSTP. The driver and firmware responds to the port-state transitions and FDB operations through the standard Linux switchdev/bridge interfaces, with no STP/RSTP related logic executed in driver/firmware. We referred to RSTP in the commit message as it is our primary use case and it implies support for STP as well. Thanks and Regards, Parvathi.