From patchwork Mon Nov 27 12:45:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 747629 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="nq8c2ZQ2" Received: from mail-qk1-x72e.google.com (mail-qk1-x72e.google.com [IPv6:2607:f8b0:4864:20::72e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 331FB137 for ; Mon, 27 Nov 2023 04:45:44 -0800 (PST) Received: by mail-qk1-x72e.google.com with SMTP id af79cd13be357-77d632b35faso224322285a.3 for ; Mon, 27 Nov 2023 04:45:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1701089143; x=1701693943; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=My7gSFRp+Y7hoOV+FBK21Q8iK89AnBNbYhuMMj6/9YA=; b=nq8c2ZQ2iSF2Iu1oeCXn1TmpOK9wA//99CcvtoPaue8jEu34xZewQr/FOqKtlyXOvM LFPOti7AhKNQbW6rCNst3etX9twZ2x+FOzOM9qDoduhn6Dkdd3mIV2nlqz3wu1xGEB0q F7eGUEg+oJPYkKqEm0P/TVpu7AG8ZuevnFpaiv4WrpJxoWg5wfBP+1BiNf3Cfp3ByBJb Qamtj5LlliWbprW14a7hPYCygiBUZhm7i+tJYIBlJ6I+MiVT8/VwgkOy2ljK4E6xdlC8 CBO+apEVSIgkTU950iQceu39ruj3WgPKsn/2pMy1ieivBPxm/ByxjeRBgjXpHan4un72 ABPg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701089143; x=1701693943; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=My7gSFRp+Y7hoOV+FBK21Q8iK89AnBNbYhuMMj6/9YA=; b=K80uTMZFED+hooE775XLBXPVtnFhDGRapMjmgTavoeNtNacbiKoyQXPN5V42ODaSOk D98OJ1+ym6k7O7awpWEx9dpu45vdbmt2/lNAUb7+pJDmdWpY9/YFJ1jJrDP7xHZ6ToGR Pm892kgJD36uXkJ2OP3SL/gDxtkjmTztSx+HgpvO8dm5UcEqyHlBAwq1e9A9HH/HcNuw hYnY1oWZlVls6nbzvDW5P5Ma1+06Bbaw0tIbB0039sAT6Cc9ud14AlqP8Zmt1Ux/N+G9 sMtcKKnRQlW+/MifoH3ahTUNeatdQv4VfdXmDu9sgsZxjLkcL4pwRVYHq2o8XSigyliO atkg== X-Gm-Message-State: AOJu0YzhSPaQx1u0bYyYnRFEkNA7e2N8DRj/YzNgEqAUgh+a4iWCy4sO oXnZykuufik6DfRwHKm2xWa4 X-Google-Smtp-Source: AGHT+IHxlyPEMgiSFO7SQKkp2Y9pFf7htAgqwPBMkxZfJRWlUXhmb2oNI5Vr/2R6YVNt+HXPnHuOGQ== X-Received: by 2002:ad4:4986:0:b0:66d:5d31:999e with SMTP id u6-20020ad44986000000b0066d5d31999emr12774208qvx.43.1701089143185; Mon, 27 Nov 2023 04:45:43 -0800 (PST) Received: from localhost.localdomain ([117.213.103.241]) by smtp.gmail.com with ESMTPSA id er10-20020a056214190a00b0067a204b4688sm2832231qvb.18.2023.11.27.04.45.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Nov 2023 04:45:42 -0800 (PST) From: Manivannan Sadhasivam To: lpieralisi@kernel.org, kw@linux.com Cc: kishon@kernel.org, bhelgaas@google.com, mhi@lists.linux.dev, linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Manivannan Sadhasivam Subject: [PATCH 0/9] bus: mhi: ep: Add async read/write support Date: Mon, 27 Nov 2023 18:15:20 +0530 Message-Id: <20231127124529.78203-1-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Hi, This series add async read/write support for the MHI endpoint stack by modifying the MHI ep stack and the MHI EPF (controller) driver. Currently, only sync read/write operations are supported by the stack, this resulting in poor data throughput as the transfer is halted until receiving the DMA completion. So this series adds async support such that the MHI transfers can continue without waiting for the transfer completion. And once the completion happens, host is notified by sending the transfer completion event. This series brings iperf throughput of ~4Gbps on SM8450 based dev platform, where previously 1.6Gbps was achieved with sync operation. - Mani Manivannan Sadhasivam (9): bus: mhi: ep: Pass mhi_ep_buf_info struct to read/write APIs bus: mhi: ep: Rename read_from_host() and write_to_host() APIs bus: mhi: ep: Introduce async read/write callbacks PCI: epf-mhi: Simulate async read/write using iATU PCI: epf-mhi: Add support for DMA async read/write operation PCI: epf-mhi: Enable MHI async read/write support bus: mhi: ep: Add support for async DMA write operation bus: mhi: ep: Add support for async DMA read operation bus: mhi: ep: Add checks for read/write callbacks while registering controllers drivers/bus/mhi/ep/internal.h | 1 + drivers/bus/mhi/ep/main.c | 256 +++++++++------ drivers/bus/mhi/ep/ring.c | 41 +-- drivers/pci/endpoint/functions/pci-epf-mhi.c | 314 ++++++++++++++++--- include/linux/mhi_ep.h | 33 +- 5 files changed, 485 insertions(+), 160 deletions(-) Reviewed-by: Krzysztof Wilczyński Acked-by: Bjorn Helgaas