From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AA191C43603 for ; Thu, 12 Dec 2019 10:56:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 67DBA227BF for ; Thu, 12 Dec 2019 10:56:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="U+Kx7jD0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728722AbfLLK4c (ORCPT ); Thu, 12 Dec 2019 05:56:32 -0500 Received: from fllv0016.ext.ti.com ([198.47.19.142]:45014 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728410AbfLLK4b (ORCPT ); Thu, 12 Dec 2019 05:56:31 -0500 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id xBCAu4Ax085682; Thu, 12 Dec 2019 04:56:04 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1576148164; bh=vmCxdW4b95BZ+rLn7HeJGCkog+ZF1+kwJcp1P0p/4ZY=; h=Subject:To:CC:References:From:Date:In-Reply-To; b=U+Kx7jD0nOaMx98dLfInxXZpbHcSDWLhX6JNui9/CYVDaUwT4cC5CbBCCk9qUfMb/ hHQwzukbNsTmJrY5sXEk5taHgwEstLyuMzwS2oc9kURV3jL6W8psowAD4wcnJ2NvVy 5sqE9LmegljZ1TNfkxOCKQKDqYuBrsFSeBmVOurU= Received: from DLEE100.ent.ti.com (dlee100.ent.ti.com [157.170.170.30]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id xBCAu3vw006640 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 12 Dec 2019 04:56:04 -0600 Received: from DLEE103.ent.ti.com (157.170.170.33) by DLEE100.ent.ti.com (157.170.170.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Thu, 12 Dec 2019 04:56:03 -0600 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE103.ent.ti.com (157.170.170.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3 via Frontend Transport; Thu, 12 Dec 2019 04:56:03 -0600 Received: from [127.0.0.1] (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id xBCAtxkV126832; Thu, 12 Dec 2019 04:55:59 -0600 Subject: Re: [PATCH v7 00/12] dmaengine/soc: Add Texas Instruments UDMA support To: Peter Ujfalusi , , , , , , , CC: , , , , , , , , , References: <20191209094332.4047-1-peter.ujfalusi@ti.com> From: Tero Kristo Message-ID: Date: Thu, 12 Dec 2019 12:55:58 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org On 12/12/2019 10:46, Peter Ujfalusi wrote: > > > On 09/12/2019 11.43, Peter Ujfalusi wrote: >> Hi, >> >> Vinod, Nishanth, Tero, Santosh: the ti_sci patch in this series was sent >> upstream over a month ago: >> https://lore.kernel.org/lkml/20191025084715.25098-1-peter.ujfalusi@ti.com/ >> >> I'm still waiting on it's fate (Tero has given his r-b). >> The ti_sci patch did not made it to 5.5-rc1, but I included it in the series and >> let the maintainers decide if it can go via DMAengine for 5.6 or to later >> releases (5.6 probably for the ti_sci and 5.7 for the UDMA driver patch). >> >> Changes since v6: >> (https://patchwork.kernel.org/project/linux-dmaengine/list/?series=209455&state=*) >> >> - UDMAP DMAengine driver: >> - Squashed the split patches >> - Squashed the early TX completion handling update >> (https://patchwork.kernel.org/project/linux-dmaengine/list/?series=210713&state=*) >> - Hard reset fix for RX channels to avoid channel lockdown >> - Correct completed descriptor's residue value > > I got build failure with allmodconfig: > > ERROR: "devm_ti_sci_get_of_resource" [drivers/soc/ti/k3-ringacc.ko] > undefined! > ERROR: "of_msi_get_domain" [drivers/soc/ti/k3-ringacc.ko] undefined! > ERROR: "devm_ti_sci_get_of_resource" [drivers/dma/ti/k3-udma.ko] undefined! > ERROR: "of_msi_get_domain" [drivers/dma/ti/k3-udma.ko] undefined! > > They are because both devm_ti_sci_get_of_resource and of_msi_get_domain > is missing EXPORT_SYMBOL_GPL(), so they can not be used from modules. > > There were patches in the past to add it for of_msi_get_domain: > https://lore.kernel.org/patchwork/patch/668123/ > https://lore.kernel.org/patchwork/patch/716046/ > > I can not find a reason why these are not merged. > Matthias's patch looks to be the earlier one, is it OK if I resend it > within v8? You can just send those two patches separately, I can apply them first before this series. No need to resend this series. -Tero > >> Changes since v5: >> (https://patchwork.kernel.org/project/linux-dmaengine/list/?series=201051&state=*) >> - Based on 5.4 >> >> - cppi5 header >> - clear the bits before setting new value with '|=' >> >> - UDMAP DT bindings: >> - valid compatibles as single enum list >> >> - UDMAP DMAengine driver: >> - Fix udma_is_chan_running() >> - Use flags for acc32, burst support instead of a bool in udma_match_data >> struct >> - TDTYPE handling (teardown completion handling for j721e) is moved to separate >> patch as the tisci core patch has not moved for over a month. >> Both ti_sci and the iterative patch to udma is included in the series. >> >> Changes since v4 >> (https://patchwork.kernel.org/project/linux-dmaengine/list/?series=196619&state=*) >> - Based on 5.4-rc7 >> >> - ringacc DT bindings: >> - clarify the meaning of ti,sci-dev-id >> >> - ringacc driver: >> - Remove 'default y' from Kconfig >> - Fix struct comments >> - Move try_module_get() earlier in k3_ringacc_request_ring() >> >> - PSI-L thread database: >> - Add kernel style struct/enum documentation >> - Add missing thread description for sa2ul second interface >> - Change EXPORT_SYMBOL to EXPORT_SYMBOL_GPL >> >> - UDMAP DT bindings: >> - move to dual license >> - change compatible from const to enum >> - items dropped for ti,sci-rm-ranges-* >> - description text moved from literal block when it is sensible >> - example fixed to compile cleanly >> - added parent to provide correct address-cells >> - navss is moved to simple-mfd from simple-bus >> >> - UDMAP DMAengine driver: >> - move fd_ring/r_ring under rflow >> - get rid of unused iomem for rflows >> - Remove 'default y' from Kconfig >> - Use defines for rflow src/dst tag selection >> - Merge the udma_ring_callback() and udma_tr_event_callback() to their >> corresponding interrupt handler >> - Create new defines for tx/rx channel's tisci valid parameter flags >> - Remove re-initialization to 0 of tisci request struct members >> - Make sure that vchan tasklets are also stopped when removing the module >> - Additional checkpatch --strict fixes when it made sense >> - make W=1 was clean >> >> - UDMAP glue layer: >> - Remove 'default y' from Kconfig >> - commit message update for features needing the glue layer >> >> Changes since v3 >> (https://patchwork.kernel.org/project/linux-dmaengine/list/?series=180679&state=*): >> - Based on 5.4-rc5 >> - Fixed typos pointed out by Tero >> - Added reviewed-by tags from Tero >> >> - ring accelerator driver >> - TODO_GS is removed from the header >> - pm_runtime removed as NAVSS and it's components are always on >> - Check validity of Message mode setup (element size > 8 bytes must use proxy) >> >> - cppi5 header >> - add commit message >> >> - UDMAP DT bindings >> - Drop the psil-config node use on the remote PSI-L side and use only one cell >> which is the remote threadID: >> >> dmas = <&main_udmap 0xc400>, <&main_udmap 0x4400>; >> dma-names = "tx", "rx"; >> >> - The PSI-L thread configuration description is moved to kernel as a new module: >> k3-psil/k3-psil-am654/k3-psil-j721e >> - ti,psil-base has been removed and moved to kernel >> - removed the no longer needed dt-bindings/dma/k3-udma.h >> - Convert the document to schema (yaml) >> >> - NEW PSI-L endpoint configuration database >> - a simple database holding the remote end's configuration needed for UDMAP >> configuration. All previous parameters from DT has been moved here and merged >> with the linux only tr mode channel flag. >> - Client drivers can update the remote endpoint configuration as it can be >> different based on system configuration and the endpoint itself is under the >> control of the peripheral driver. >> - database for am654 and j721e >> >> - UDMAP DMAengine driver >> - pm_runtime removed as NAVSS and it's components are always on >> - rchan_oes_offset added to MSI dommain allocation >> - Use the new PSI-L endpoint database for UDMAP configuration >> - Support for waiting for PDMA teardown completion on j721e instead of >> returning right away. depends on: >> https://lkml.org/lkml/2019/10/25/189 >> Not included in this series, but it is in the branch I have prepared. >> - psil-base is moved from DT to be part of udma_match_data >> - tr_thread maps is removed and using the PSI-L endpoint configuration for it >> >> - UDMAP glue layer >> - pm_runtime removed as NAVSS and it's components are always on >> - Use the new PSI-L endpoint database for UDMAP configuration >> >> Changes since v2 >> (https://patchwork.kernel.org/project/linux-dmaengine/list/?series=152609&state=*) >> - Based on 5.4-rc1 >> - Support for Flow only data transfer for the glue layer >> >> - cppi5 header >> - comments converted to kernel-doc style >> - Remove the excessive WARN_ONs and rely on the user for sanity >> - new macro for checking TearDown Completion Message >> >> - ring accelerator driver >> - fixed up th commit message (SoB, TI-SCI) >> - fixed ring reset >> - CONFIG_TI_K3_RINGACC_DEBUG is removed along with the dbg_write/read functions >> and use dev_dbg() >> - k3_ringacc_ring_dump() is moved to static >> - step numbering removed from k3_ringacc_ring_reset_dma() >> - Add clarification comment for shared ring usage in k3_ringacc_ring_cfg() >> - Magic shift values in k3_ringacc_ring_cfg_proxy() got defined >> - K3_RINGACC_RING_MODE_QM is removed as it is not supported >> >> - UDMAP DT bindings >> - Fix property prefixing: s/pdma,/ti,pdma- >> - Add ti,notdpkt property to suppress teardown completion message on tchan >> - example updated accordingly >> >> - UDMAP DMAengine driver >> - Change __raw_readl/writel to readl/writel >> - Split up the udma_tisci_channel_config() into m2m, tx and rx tisci >> configuration functions for clarity >> - DT bindings change: s/pdma,/ti,pdma- >> - Cleanup of udma_tx_status(): >> - residue calculation fix for m2m >> - no need to read packet counter as it is not used >> - peer byte counter only available in PDMAs >> - Proper locking to avoid race with interrupt handler (polled m2m fix) >> - Support for ti,notdpkt >> - RFLOW management rework to support data movement without channel: >> - the channel is not controlled by Linux but other core and we only have >> rflows and rings to do the DMA transfers. >> This mode is only supported by the Glue layer for now. >> >> - UDMAP glue layer >> - Debug print improvements >> - Support for rflow/ring only data movement >> >> Changes since v1 >> (https://patchwork.kernel.org/project/linux-dmaengine/list/?series=114105&state=*) >> - Added support for j721e >> - Based on 5.3-rc2 >> - dropped ti_sci API patch for RM management as it is already upstream >> - dropped dmadev_get_slave_channel() patch, using __dma_request_channel() >> - Added Rob's Reviewed-by to ringacc DT binding document patch >> - DT bindings changes: >> - linux,udma-mode is gone, I have a simple lookup table in the driver to flag >> TR channels. >> - Support for j721e >> - Fix bug in of_node_put() handling in xlate function >> >> Changes since RFC (https://patchwork.kernel.org/cover/10612465/): >> - Based on linux-next (20190506) which now have the ti_sci interrupt support >> - The series can be applied and the UDMA via DMAengine API will be functional >> - Included in the series: ti_sci Resource management API, cppi5 header and >> driver for the ring accelerator. >> - The DMAengine core patches have been updated as per the review comments for >> earlier submittion. >> - The DMAengine driver patch is artificially split up to 6 smaller patches >> >> The k3-udma driver implements the Data Movement Architecture described in >> AM65x TRM (http://www.ti.com/lit/pdf/spruid7) and >> j721e TRM (http://www.ti.com/lit/pdf/spruil1) >> >> This DMA architecture is a big departure from 'traditional' architecture where >> we had either EDMA or sDMA as system DMA. >> >> Packet DMAs were used as dedicated DMAs to service only networking (Kesytone2) >> or USB (am335x) while other peripherals were serviced by EDMA. >> >> In AM65x/j721e the UDMA (Unified DMA) is used for all data movment within the >> SoC, tasked to service all peripherals (UART, McSPI, McASP, networking, etc). >> >> The NAVSS/UDMA is built around CPPI5 (Communications Port Programming Interface) >> and it supports Packet mode (similar to CPPI4.1 in Keystone2 for networking) and >> TR mode (similar to EDMA descriptor). >> The data movement is done within a PSI-L fabric, peripherals (including the >> UDMA-P) are not addressed by their I/O register as with traditional DMAs but >> with their PSI-L thread ID. >> >> In AM65x/j721e we have two main type of peripherals: >> Legacy: McASP, McSPI, UART, etc. >> to provide connectivity they are serviced by PDMA (Peripheral DMA) >> PDMA threads are locked to service a given peripheral, for example PSI-L thread >> 0x4400/0xc400 is to service McASP0 rx/tx. >> The PDMa configuration can be done via the UDMA Real Time Peer registers. >> Native: Networking, security accelerator >> these peripherals have native support for PSI-L. >> >> To be able to use the DMA the following generic steps need to be taken: >> - configure a DMA channel (tchan for TX, rchan for RX) >> - channel mode: Packet or TR mode >> - for memcpy a tchan and rchan pair is used. >> - for packet mode RX we also need to configure a receive flow to configure the >> packet receiption >> - the source and destination threads must be paired >> - at minimum one pair of rings need to be configured: >> - tx: transfer ring and transfer completion ring >> - rx: free descriptor ring and receive ring >> - two interrupts: UDMA-P channel interrupt and ring interrupt for tc_ring/r_ring >> - If the channel is in packet mode or configured to memcpy then we only need >> one interrupt from the ring, events from UDMAP is not used. >> >> When the channel setup is completed we only interract with the rings: >> - TX: push a descriptor to t_ring and wait for it to be pushed to the tc_ring by >> the UDMA-P >> - RX: push a descriptor to the fd_ring and waith for UDMA-P to push it back to >> the r_ring. >> >> Since we have FIFOs in the DMA fabric (UDMA-P, PSI-L and PDMA) which was not the >> case in previous DMAs we need to report the amount of data held in these FIFOs >> to clients (delay calculation for ALSA, UART FIFO flush support). >> >> Metadata support: >> DMAengine user driver was posted upstream based/tested on the v1 of the UDMA >> series: https://lkml.org/lkml/2019/6/28/20 >> SA2UL is using the metadata DMAengine API. >> >> Note on the last patch: >> In Keystone2 the networking had dedicated DMA (packet DMA) which is not the case >> anymore and the DMAengine API currently missing support for the features we >> would need to support networking, things like >> - support for receive descriptor 'classification' >> - we need to support several receive queues for a channel. >> - the queues are used for packet priority handling for example, but they can be >> used to have pools of descriptors for different sizes. >> - out of order completion of descriptors on a channel >> - when we have several queues to handle different priority packets the >> descriptors will be completed 'out-of-order' >> - NAPI type of operation (polling instead of interrupt driven transfer) >> - without this we can not sustain gigabit speeds and we need to support NAPI >> - not to limit this to networking, but other high performance operations >> >> It is my intention to work on these to be able to remove the 'glue' layer and >> switch to DMAengine API - or have an API aside of DMAengine to have generic way >> to support networking, but given how controversial and not trivial these changes >> are we need something to support networking. >> >> The series (+DT patches to enabled DMA on AM65x and j721e) on top of 5.5-rc1 is >> available: >> https://github.com/omap-audio/linux-audio.git peter/udma/series_v7-5.5-rc1 >> >> Regards, >> Peter >> --- >> Grygorii Strashko (3): >> bindings: soc: ti: add documentation for k3 ringacc >> soc: ti: k3: add navss ringacc driver >> dmaengine: ti: k3-udma: Add glue layer for non DMAengine users >> >> Peter Ujfalusi (9): >> dmaengine: doc: Add sections for per descriptor metadata support >> dmaengine: Add metadata_ops for dma_async_tx_descriptor >> dmaengine: Add support for reporting DMA cached data amount >> dmaengine: ti: Add cppi5 header for K3 NAVSS/UDMA >> dmaengine: ti: k3 PSI-L remote endpoint configuration >> dt-bindings: dma: ti: Add document for K3 UDMA >> dmaengine: ti: New driver for K3 UDMA >> firmware: ti_sci: rm: Add support for tx_tdtype parameter for tx >> channel >> dmaengine: ti: k3-udma: Wait for peer teardown completion if supported >> >> .../devicetree/bindings/dma/ti/k3-udma.yaml | 185 + >> .../devicetree/bindings/soc/ti/k3-ringacc.txt | 59 + >> Documentation/driver-api/dmaengine/client.rst | 75 + >> .../driver-api/dmaengine/provider.rst | 46 + >> drivers/dma/dmaengine.c | 73 + >> drivers/dma/dmaengine.h | 8 + >> drivers/dma/ti/Kconfig | 24 + >> drivers/dma/ti/Makefile | 3 + >> drivers/dma/ti/k3-psil-am654.c | 175 + >> drivers/dma/ti/k3-psil-j721e.c | 222 ++ >> drivers/dma/ti/k3-psil-priv.h | 39 + >> drivers/dma/ti/k3-psil.c | 97 + >> drivers/dma/ti/k3-udma-glue.c | 1198 ++++++ >> drivers/dma/ti/k3-udma-private.c | 133 + >> drivers/dma/ti/k3-udma.c | 3452 +++++++++++++++++ >> drivers/dma/ti/k3-udma.h | 151 + >> drivers/firmware/ti_sci.c | 1 + >> drivers/firmware/ti_sci.h | 7 + >> drivers/soc/ti/Kconfig | 11 + >> drivers/soc/ti/Makefile | 1 + >> drivers/soc/ti/k3-ringacc.c | 1180 ++++++ >> include/linux/dma/k3-psil.h | 71 + >> include/linux/dma/k3-udma-glue.h | 134 + >> include/linux/dma/ti-cppi5.h | 1061 +++++ >> include/linux/dmaengine.h | 110 + >> include/linux/soc/ti/k3-ringacc.h | 244 ++ >> include/linux/soc/ti/ti_sci_protocol.h | 2 + >> 27 files changed, 8762 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/dma/ti/k3-udma.yaml >> create mode 100644 Documentation/devicetree/bindings/soc/ti/k3-ringacc.txt >> create mode 100644 drivers/dma/ti/k3-psil-am654.c >> create mode 100644 drivers/dma/ti/k3-psil-j721e.c >> create mode 100644 drivers/dma/ti/k3-psil-priv.h >> create mode 100644 drivers/dma/ti/k3-psil.c >> create mode 100644 drivers/dma/ti/k3-udma-glue.c >> create mode 100644 drivers/dma/ti/k3-udma-private.c >> create mode 100644 drivers/dma/ti/k3-udma.c >> create mode 100644 drivers/dma/ti/k3-udma.h >> create mode 100644 drivers/soc/ti/k3-ringacc.c >> create mode 100644 include/linux/dma/k3-psil.h >> create mode 100644 include/linux/dma/k3-udma-glue.h >> create mode 100644 include/linux/dma/ti-cppi5.h >> create mode 100644 include/linux/soc/ti/k3-ringacc.h >> > > - Péter > > -- Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. 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