From patchwork Mon Dec 23 11:04:45 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 182379 Delivered-To: patch@linaro.org Received: by 2002:a92:a146:0:0:0:0:0 with SMTP id v67csp276283ili; Mon, 23 Dec 2019 03:05:23 -0800 (PST) X-Google-Smtp-Source: APXvYqykAK/+bDQnnrSjBej9DRBPRJCo6VvfLkPRSsjrBx0f1RS5Svcxj/FpwpPM+CeGf1R2KnED X-Received: by 2002:a9d:478:: with SMTP id 111mr31354016otc.359.1577099123322; Mon, 23 Dec 2019 03:05:23 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1577099123; cv=none; d=google.com; s=arc-20160816; b=L5HQtpxZpwbeig71ufr6NkRh2Dh9ACIaMus2TKnBst0ltPb478GNXoQ69pEoxA1pFu HPBD0DuzXYkQf5MKsfia7sRuzi/I6UmZVx6EC4o2wequKkkr58WTV1UlUFb5ezrzI0pJ SUlXyTd/xmuci91Q6UhYc3CaBPbTKtfMPPlQqn0ilozIJpydVM153EUvf799ZtW4bP9e SwNlfNdCLGabRvrfT7NOUtkbcmzPuQW+HciWbZb1QDSygNNOx/60lhdhxD3XZCvGXthy T8xJvK1kanQFPYeM/kMJ89uPSbUOTzN8QPOOOGZMyd5EKPmAwYDs0qKAjgucvbJE9/GO zi4w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=InxUgyvU8lymSAtilFp+vD1kDqNPZsdnOQIPWDDC2Kc=; b=ljdcLrtwd7ATry11Aa9WeoY06uwWvD5usmaj3DGhN7u+YUCXx8AfNXM10hOS3U9pFw 3yy0eDfZaXjgv5imto2FQSwGqiMG5auwsDYnhDlJlh42yNwqhbbQQTd/FpjAaCHQDWZd eQlyWSEGO5pVyHSM/HJWS82TkwQL8+Z9XdYoCT5AOmWKMcBqamGoXxWAjnO/a75nMyro JoMLgngJ3u7PAsCfLgHgzndLeRSLh6GGQck27NDpuexNiO2wtJNc/5yekHFWsxzNbkB/ F7KJ1QwMmyPywffH6JWVw4rHCIBiQCjSpSDXePdcMGw94jlVjABnbtsCQBhLf70iRnkG Re1Q== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=TlhDqKNG; spf=pass (google.com: best guess record for domain of dmaengine-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=dmaengine-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id u25si7492386otg.170.2019.12.23.03.05.23; Mon, 23 Dec 2019 03:05:23 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of dmaengine-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=TlhDqKNG; spf=pass (google.com: best guess record for domain of dmaengine-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=dmaengine-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727008AbfLWLFW (ORCPT + 3 others); Mon, 23 Dec 2019 06:05:22 -0500 Received: from lelv0142.ext.ti.com ([198.47.23.249]:44674 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726959AbfLWLFW (ORCPT ); Mon, 23 Dec 2019 06:05:22 -0500 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id xBNB5D1n110565; Mon, 23 Dec 2019 05:05:13 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1577099113; bh=InxUgyvU8lymSAtilFp+vD1kDqNPZsdnOQIPWDDC2Kc=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=TlhDqKNG0Rfe30Pc+Pl+QdNXGOZ4KB59QZ672eUZ/0cHduxZdL1LwYNpm/jOKL4k0 iKHNfGggrBBhAa/62K/KjyKRuyMrITjdoI4Iy/dmO/nvCuv2VTv0eejD5htHtxjLbY fS9zzumP9UyQ1EroIpqQ1c6tZufCLJgta36o8/VY= Received: from DFLE102.ent.ti.com (dfle102.ent.ti.com [10.64.6.23]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id xBNB5D1i106727 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 23 Dec 2019 05:05:13 -0600 Received: from DFLE107.ent.ti.com (10.64.6.28) by DFLE102.ent.ti.com (10.64.6.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Mon, 23 Dec 2019 05:05:04 -0600 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE107.ent.ti.com (10.64.6.28) 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; Mon, 23 Dec 2019 05:05:04 -0600 Received: from feketebors.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id xBNB4eMC025693; Mon, 23 Dec 2019 05:05:00 -0600 From: Peter Ujfalusi To: , , , CC: , , , , , , , , , , , Subject: [PATCH v8 05/18] dmaengine: Add support for reporting DMA cached data amount Date: Mon, 23 Dec 2019 13:04:45 +0200 Message-ID: <20191223110458.30766-6-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191223110458.30766-1-peter.ujfalusi@ti.com> References: <20191223110458.30766-1-peter.ujfalusi@ti.com> MIME-Version: 1.0 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 A DMA hardware can have big cache or FIFO and the amount of data sitting in the DMA fabric can be an interest for the clients. For example in audio we want to know the delay in the data flow and in case the DMA have significantly large FIFO/cache, it can affect the latenc/delay Signed-off-by: Peter Ujfalusi Reviewed-by: Tero Kristo Tested-by: Keerthy Reviewed-by: Grygorii Strashko --- drivers/dma/dmaengine.h | 8 ++++++++ include/linux/dmaengine.h | 2 ++ 2 files changed, 10 insertions(+) -- Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki diff --git a/drivers/dma/dmaengine.h b/drivers/dma/dmaengine.h index 501c0b063f85..b0b97475707a 100644 --- a/drivers/dma/dmaengine.h +++ b/drivers/dma/dmaengine.h @@ -77,6 +77,7 @@ static inline enum dma_status dma_cookie_status(struct dma_chan *chan, state->last = complete; state->used = used; state->residue = 0; + state->in_flight_bytes = 0; } return dma_async_is_complete(cookie, complete, used); } @@ -87,6 +88,13 @@ static inline void dma_set_residue(struct dma_tx_state *state, u32 residue) state->residue = residue; } +static inline void dma_set_in_flight_bytes(struct dma_tx_state *state, + u32 in_flight_bytes) +{ + if (state) + state->in_flight_bytes = in_flight_bytes; +} + struct dmaengine_desc_callback { dma_async_tx_callback callback; dma_async_tx_callback_result callback_result; diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index 81ce9d2480c4..7f9a7150a632 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -686,11 +686,13 @@ static inline struct dma_async_tx_descriptor *txd_next(struct dma_async_tx_descr * @residue: the remaining number of bytes left to transmit * on the selected transfer for states DMA_IN_PROGRESS and * DMA_PAUSED if this is implemented in the driver, else 0 + * @in_flight_bytes: amount of data in bytes cached by the DMA. */ struct dma_tx_state { dma_cookie_t last; dma_cookie_t used; u32 residue; + u32 in_flight_bytes; }; /** From patchwork Mon Dec 23 11:04:48 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 182381 Delivered-To: patch@linaro.org Received: by 2002:a92:a146:0:0:0:0:0 with SMTP id v67csp276458ili; Mon, 23 Dec 2019 03:05:31 -0800 (PST) X-Google-Smtp-Source: APXvYqynd4YrT7tb0wfZ62o308o9TyKcjvWB9dfe+XiNDorDDBt/UxwmgLGUhZKqKZVJTaXd843Y X-Received: by 2002:a9d:7d99:: with SMTP id j25mr21117539otn.226.1577099131095; Mon, 23 Dec 2019 03:05:31 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1577099131; cv=none; d=google.com; s=arc-20160816; b=CGEzoOG74g56oftr7HB+3YviTOqzP5UdTsca6qknYoB7BmZJ9mcyGkOa5jO6xautUX Q3VHanh3R32xSNwc3c1Pt6i9t9VqxOsV8pGbRBARPBZpT9yGGo90Xi8VcHMUjqXAfNbD C0WtwQgYp3GQGeOHk2Ez2tBUvoEbhddv6m1OLHfjdvso6znNKNVImUWaN7AgKj6KFzLD GsKx6mfGAHDNG0W4eIK2pLZxixn3BKHM1JPhaLOT9OFainuq76gCUFQ98DZCOyKqpbr7 4K1FtXyLlvaIO7vajsMrkoEk4vxmcO6cQiPWdR88ziriEG+E3JohA8UrjSc96NMMKL8x 9Azw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=MheCHb4mMwBEh100tl2VKDMiyG+sqNJm0I5Ycd2wDzA=; b=Tv+q5VSs/IPpn928FaAaRrsYTZueERGd6ahmvi6NZXBIymzIPvWSbb9MQ+PQpbhtZP NE7I52Hxd7Pjd3XaaLh3tWI+iewvvOqM2R4enjLNkgVIeu75SDe3rqP/2F3dgglcHZst p8irlkJk606liw9fqmpCHISu6lf4g4j0Lyv9uw+/cA+24b4grPjjX8Jp1G78S2bwgv92 EXW5bN+z9ce0jyhqT+KiCcQ0+73VEBwkaDd0fE7lrd73tjwNyQlkKmMPpEfKJU1WvbwB iUGMI+TDm6GSIoRFY4fEFcclL3pNWWFulTiu7Pr8si7bEuA9fouo5xgMjCFgzPH6Wt33 OSEA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=hVUFU7yG; spf=pass (google.com: best guess record for domain of dmaengine-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=dmaengine-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id t20si9950288otr.64.2019.12.23.03.05.30; Mon, 23 Dec 2019 03:05:31 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of dmaengine-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=hVUFU7yG; spf=pass (google.com: best guess record for domain of dmaengine-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=dmaengine-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727092AbfLWLFa (ORCPT + 3 others); Mon, 23 Dec 2019 06:05:30 -0500 Received: from lelv0143.ext.ti.com ([198.47.23.248]:54082 "EHLO lelv0143.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726933AbfLWLF3 (ORCPT ); Mon, 23 Dec 2019 06:05:29 -0500 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id xBNB5H9A085667; Mon, 23 Dec 2019 05:05:17 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1577099117; bh=MheCHb4mMwBEh100tl2VKDMiyG+sqNJm0I5Ycd2wDzA=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=hVUFU7yGloMpp6W2GUFeMtq0lcANX/2wYTzDPMFF5/7JESuj0hUnwdPUSBqZZYons M85Wnm2BCoGvYsGL+B2dRzHJA4cByix4ZNo6ZnMogGwri1R9ErF+ZefYVj+qqyDeZN kTLipzttBjOBvVSMaoT4IAglsZ0dRwwuWagRIZEo= Received: from DFLE100.ent.ti.com (dfle100.ent.ti.com [10.64.6.21]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id xBNB5H2K106845 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 23 Dec 2019 05:05:17 -0600 Received: from DFLE106.ent.ti.com (10.64.6.27) by DFLE100.ent.ti.com (10.64.6.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Mon, 23 Dec 2019 05:05:15 -0600 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE106.ent.ti.com (10.64.6.27) 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; Mon, 23 Dec 2019 05:05:15 -0600 Received: from feketebors.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id xBNB4eMF025693; Mon, 23 Dec 2019 05:05:12 -0600 From: Peter Ujfalusi To: , , , CC: , , , , , , , , , , , Subject: [PATCH v8 08/18] dmaengine: ti: k3 PSI-L remote endpoint configuration Date: Mon, 23 Dec 2019 13:04:48 +0200 Message-ID: <20191223110458.30766-9-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191223110458.30766-1-peter.ujfalusi@ti.com> References: <20191223110458.30766-1-peter.ujfalusi@ti.com> MIME-Version: 1.0 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 In K3 architecture the DMA operates within threads. One end of the thread is UDMAP, the other is on the peripheral side. The UDMAP channel configuration depends on the needs of the remote endpoint and it can be differ from peripheral to peripheral. This patch adds database for am654 and j721e and small API to fetch the PSI-L endpoint configuration from the database which should only used by the DMA driver(s). Another API is added for native peripherals to give possibility to pass new configuration for the threads they are using, which is needed to be able to handle changes caused by different firmware loaded for the peripheral for example. Signed-off-by: Peter Ujfalusi Tested-by: Keerthy Reviewed-by: Grygorii Strashko --- drivers/dma/ti/Kconfig | 3 + drivers/dma/ti/Makefile | 1 + 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 | 93 ++++++++++++++ include/linux/dma/k3-psil.h | 71 +++++++++++ 7 files changed, 604 insertions(+) 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 include/linux/dma/k3-psil.h -- Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki diff --git a/drivers/dma/ti/Kconfig b/drivers/dma/ti/Kconfig index d507c24fbf31..72f3d2728178 100644 --- a/drivers/dma/ti/Kconfig +++ b/drivers/dma/ti/Kconfig @@ -34,5 +34,8 @@ config DMA_OMAP Enable support for the TI sDMA (System DMA or DMA4) controller. This DMA engine is found on OMAP and DRA7xx parts. +config TI_K3_PSIL + bool + config TI_DMA_CROSSBAR bool diff --git a/drivers/dma/ti/Makefile b/drivers/dma/ti/Makefile index 113e59ec9c32..f8d912ad7eaf 100644 --- a/drivers/dma/ti/Makefile +++ b/drivers/dma/ti/Makefile @@ -2,4 +2,5 @@ obj-$(CONFIG_TI_CPPI41) += cppi41.o obj-$(CONFIG_TI_EDMA) += edma.o obj-$(CONFIG_DMA_OMAP) += omap-dma.o +obj-$(CONFIG_TI_K3_PSIL) += k3-psil.o k3-psil-am654.o k3-psil-j721e.o obj-$(CONFIG_TI_DMA_CROSSBAR) += dma-crossbar.o diff --git a/drivers/dma/ti/k3-psil-am654.c b/drivers/dma/ti/k3-psil-am654.c new file mode 100644 index 000000000000..7da9242b6114 --- /dev/null +++ b/drivers/dma/ti/k3-psil-am654.c @@ -0,0 +1,175 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com + * Author: Peter Ujfalusi + */ + +#include + +#include "k3-psil-priv.h" + +#define PSIL_PDMA_XY_TR(x) \ + { \ + .thread_id = x, \ + .ep_config = { \ + .ep_type = PSIL_EP_PDMA_XY, \ + }, \ + } + +#define PSIL_PDMA_XY_PKT(x) \ + { \ + .thread_id = x, \ + .ep_config = { \ + .ep_type = PSIL_EP_PDMA_XY, \ + .pkt_mode = 1, \ + }, \ + } + +#define PSIL_ETHERNET(x) \ + { \ + .thread_id = x, \ + .ep_config = { \ + .ep_type = PSIL_EP_NATIVE, \ + .pkt_mode = 1, \ + .needs_epib = 1, \ + .psd_size = 16, \ + }, \ + } + +#define PSIL_SA2UL(x, tx) \ + { \ + .thread_id = x, \ + .ep_config = { \ + .ep_type = PSIL_EP_NATIVE, \ + .pkt_mode = 1, \ + .needs_epib = 1, \ + .psd_size = 64, \ + .notdpkt = tx, \ + }, \ + } + +/* PSI-L source thread IDs, used for RX (DMA_DEV_TO_MEM) */ +struct psil_ep am654_src_ep_map[] = { + /* SA2UL */ + PSIL_SA2UL(0x4000, 0), + PSIL_SA2UL(0x4001, 0), + PSIL_SA2UL(0x4002, 0), + PSIL_SA2UL(0x4003, 0), + /* PRU_ICSSG0 */ + PSIL_ETHERNET(0x4100), + PSIL_ETHERNET(0x4101), + PSIL_ETHERNET(0x4102), + PSIL_ETHERNET(0x4103), + /* PRU_ICSSG1 */ + PSIL_ETHERNET(0x4200), + PSIL_ETHERNET(0x4201), + PSIL_ETHERNET(0x4202), + PSIL_ETHERNET(0x4203), + /* PRU_ICSSG2 */ + PSIL_ETHERNET(0x4300), + PSIL_ETHERNET(0x4301), + PSIL_ETHERNET(0x4302), + PSIL_ETHERNET(0x4303), + /* PDMA0 - McASPs */ + PSIL_PDMA_XY_TR(0x4400), + PSIL_PDMA_XY_TR(0x4401), + PSIL_PDMA_XY_TR(0x4402), + /* PDMA1 - SPI0-4 */ + PSIL_PDMA_XY_PKT(0x4500), + PSIL_PDMA_XY_PKT(0x4501), + PSIL_PDMA_XY_PKT(0x4502), + PSIL_PDMA_XY_PKT(0x4503), + PSIL_PDMA_XY_PKT(0x4504), + PSIL_PDMA_XY_PKT(0x4505), + PSIL_PDMA_XY_PKT(0x4506), + PSIL_PDMA_XY_PKT(0x4507), + PSIL_PDMA_XY_PKT(0x4508), + PSIL_PDMA_XY_PKT(0x4509), + PSIL_PDMA_XY_PKT(0x450a), + PSIL_PDMA_XY_PKT(0x450b), + PSIL_PDMA_XY_PKT(0x450c), + PSIL_PDMA_XY_PKT(0x450d), + PSIL_PDMA_XY_PKT(0x450e), + PSIL_PDMA_XY_PKT(0x450f), + PSIL_PDMA_XY_PKT(0x4510), + PSIL_PDMA_XY_PKT(0x4511), + PSIL_PDMA_XY_PKT(0x4512), + PSIL_PDMA_XY_PKT(0x4513), + /* PDMA1 - USART0-2 */ + PSIL_PDMA_XY_PKT(0x4514), + PSIL_PDMA_XY_PKT(0x4515), + PSIL_PDMA_XY_PKT(0x4516), + /* CPSW0 */ + PSIL_ETHERNET(0x7000), + /* MCU_PDMA0 - ADCs */ + PSIL_PDMA_XY_TR(0x7100), + PSIL_PDMA_XY_TR(0x7101), + PSIL_PDMA_XY_TR(0x7102), + PSIL_PDMA_XY_TR(0x7103), + /* MCU_PDMA1 - MCU_SPI0-2 */ + PSIL_PDMA_XY_PKT(0x7200), + PSIL_PDMA_XY_PKT(0x7201), + PSIL_PDMA_XY_PKT(0x7202), + PSIL_PDMA_XY_PKT(0x7203), + PSIL_PDMA_XY_PKT(0x7204), + PSIL_PDMA_XY_PKT(0x7205), + PSIL_PDMA_XY_PKT(0x7206), + PSIL_PDMA_XY_PKT(0x7207), + PSIL_PDMA_XY_PKT(0x7208), + PSIL_PDMA_XY_PKT(0x7209), + PSIL_PDMA_XY_PKT(0x720a), + PSIL_PDMA_XY_PKT(0x720b), + /* MCU_PDMA1 - MCU_USART0 */ + PSIL_PDMA_XY_PKT(0x7212), +}; + +/* PSI-L destination thread IDs, used for TX (DMA_MEM_TO_DEV) */ +struct psil_ep am654_dst_ep_map[] = { + /* SA2UL */ + PSIL_SA2UL(0xc000, 1), + PSIL_SA2UL(0xc001, 1), + /* PRU_ICSSG0 */ + PSIL_ETHERNET(0xc100), + PSIL_ETHERNET(0xc101), + PSIL_ETHERNET(0xc102), + PSIL_ETHERNET(0xc103), + PSIL_ETHERNET(0xc104), + PSIL_ETHERNET(0xc105), + PSIL_ETHERNET(0xc106), + PSIL_ETHERNET(0xc107), + /* PRU_ICSSG1 */ + PSIL_ETHERNET(0xc200), + PSIL_ETHERNET(0xc201), + PSIL_ETHERNET(0xc202), + PSIL_ETHERNET(0xc203), + PSIL_ETHERNET(0xc204), + PSIL_ETHERNET(0xc205), + PSIL_ETHERNET(0xc206), + PSIL_ETHERNET(0xc207), + /* PRU_ICSSG2 */ + PSIL_ETHERNET(0xc300), + PSIL_ETHERNET(0xc301), + PSIL_ETHERNET(0xc302), + PSIL_ETHERNET(0xc303), + PSIL_ETHERNET(0xc304), + PSIL_ETHERNET(0xc305), + PSIL_ETHERNET(0xc306), + PSIL_ETHERNET(0xc307), + /* CPSW0 */ + PSIL_ETHERNET(0xf000), + PSIL_ETHERNET(0xf001), + PSIL_ETHERNET(0xf002), + PSIL_ETHERNET(0xf003), + PSIL_ETHERNET(0xf004), + PSIL_ETHERNET(0xf005), + PSIL_ETHERNET(0xf006), + PSIL_ETHERNET(0xf007), +}; + +struct psil_ep_map am654_ep_map = { + .name = "am654", + .src = am654_src_ep_map, + .src_count = ARRAY_SIZE(am654_src_ep_map), + .dst = am654_dst_ep_map, + .dst_count = ARRAY_SIZE(am654_dst_ep_map), +}; diff --git a/drivers/dma/ti/k3-psil-j721e.c b/drivers/dma/ti/k3-psil-j721e.c new file mode 100644 index 000000000000..a609d496fddd --- /dev/null +++ b/drivers/dma/ti/k3-psil-j721e.c @@ -0,0 +1,222 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com + * Author: Peter Ujfalusi + */ + +#include + +#include "k3-psil-priv.h" + +#define PSIL_PDMA_XY_TR(x) \ + { \ + .thread_id = x, \ + .ep_config = { \ + .ep_type = PSIL_EP_PDMA_XY, \ + }, \ + } + +#define PSIL_PDMA_XY_PKT(x) \ + { \ + .thread_id = x, \ + .ep_config = { \ + .ep_type = PSIL_EP_PDMA_XY, \ + .pkt_mode = 1, \ + }, \ + } + +#define PSIL_PDMA_MCASP(x) \ + { \ + .thread_id = x, \ + .ep_config = { \ + .ep_type = PSIL_EP_PDMA_XY, \ + .pdma_acc32 = 1, \ + .pdma_burst = 1, \ + }, \ + } + +#define PSIL_ETHERNET(x) \ + { \ + .thread_id = x, \ + .ep_config = { \ + .ep_type = PSIL_EP_NATIVE, \ + .pkt_mode = 1, \ + .needs_epib = 1, \ + .psd_size = 16, \ + }, \ + } + +#define PSIL_SA2UL(x, tx) \ + { \ + .thread_id = x, \ + .ep_config = { \ + .ep_type = PSIL_EP_NATIVE, \ + .pkt_mode = 1, \ + .needs_epib = 1, \ + .psd_size = 64, \ + .notdpkt = tx, \ + }, \ + } + +/* PSI-L source thread IDs, used for RX (DMA_DEV_TO_MEM) */ +struct psil_ep j721e_src_ep_map[] = { + /* SA2UL */ + PSIL_SA2UL(0x4000, 0), + PSIL_SA2UL(0x4001, 0), + PSIL_SA2UL(0x4002, 0), + PSIL_SA2UL(0x4003, 0), + /* PRU_ICSSG0 */ + PSIL_ETHERNET(0x4100), + PSIL_ETHERNET(0x4101), + PSIL_ETHERNET(0x4102), + PSIL_ETHERNET(0x4103), + /* PRU_ICSSG1 */ + PSIL_ETHERNET(0x4200), + PSIL_ETHERNET(0x4201), + PSIL_ETHERNET(0x4202), + PSIL_ETHERNET(0x4203), + /* PDMA6 (PSIL_PDMA_MCASP_G0) - McASP0-2 */ + PSIL_PDMA_MCASP(0x4400), + PSIL_PDMA_MCASP(0x4401), + PSIL_PDMA_MCASP(0x4402), + /* PDMA7 (PSIL_PDMA_MCASP_G1) - McASP3-11 */ + PSIL_PDMA_MCASP(0x4500), + PSIL_PDMA_MCASP(0x4501), + PSIL_PDMA_MCASP(0x4502), + PSIL_PDMA_MCASP(0x4503), + PSIL_PDMA_MCASP(0x4504), + PSIL_PDMA_MCASP(0x4505), + PSIL_PDMA_MCASP(0x4506), + PSIL_PDMA_MCASP(0x4507), + PSIL_PDMA_MCASP(0x4508), + /* PDMA8 (PDMA_MISC_G0) - SPI0-1 */ + PSIL_PDMA_XY_PKT(0x4600), + PSIL_PDMA_XY_PKT(0x4601), + PSIL_PDMA_XY_PKT(0x4602), + PSIL_PDMA_XY_PKT(0x4603), + PSIL_PDMA_XY_PKT(0x4604), + PSIL_PDMA_XY_PKT(0x4605), + PSIL_PDMA_XY_PKT(0x4606), + PSIL_PDMA_XY_PKT(0x4607), + /* PDMA9 (PDMA_MISC_G1) - SPI2-3 */ + PSIL_PDMA_XY_PKT(0x460c), + PSIL_PDMA_XY_PKT(0x460d), + PSIL_PDMA_XY_PKT(0x460e), + PSIL_PDMA_XY_PKT(0x460f), + PSIL_PDMA_XY_PKT(0x4610), + PSIL_PDMA_XY_PKT(0x4611), + PSIL_PDMA_XY_PKT(0x4612), + PSIL_PDMA_XY_PKT(0x4613), + /* PDMA10 (PDMA_MISC_G2) - SPI4-5 */ + PSIL_PDMA_XY_PKT(0x4618), + PSIL_PDMA_XY_PKT(0x4619), + PSIL_PDMA_XY_PKT(0x461a), + PSIL_PDMA_XY_PKT(0x461b), + PSIL_PDMA_XY_PKT(0x461c), + PSIL_PDMA_XY_PKT(0x461d), + PSIL_PDMA_XY_PKT(0x461e), + PSIL_PDMA_XY_PKT(0x461f), + /* PDMA11 (PDMA_MISC_G3) */ + PSIL_PDMA_XY_PKT(0x4624), + PSIL_PDMA_XY_PKT(0x4625), + PSIL_PDMA_XY_PKT(0x4626), + PSIL_PDMA_XY_PKT(0x4627), + PSIL_PDMA_XY_PKT(0x4628), + PSIL_PDMA_XY_PKT(0x4629), + PSIL_PDMA_XY_PKT(0x4630), + PSIL_PDMA_XY_PKT(0x463a), + /* PDMA13 (PDMA_USART_G0) - UART0-1 */ + PSIL_PDMA_XY_PKT(0x4700), + PSIL_PDMA_XY_PKT(0x4701), + /* PDMA14 (PDMA_USART_G1) - UART2-3 */ + PSIL_PDMA_XY_PKT(0x4702), + PSIL_PDMA_XY_PKT(0x4703), + /* PDMA15 (PDMA_USART_G2) - UART4-9 */ + PSIL_PDMA_XY_PKT(0x4704), + PSIL_PDMA_XY_PKT(0x4705), + PSIL_PDMA_XY_PKT(0x4706), + PSIL_PDMA_XY_PKT(0x4707), + PSIL_PDMA_XY_PKT(0x4708), + PSIL_PDMA_XY_PKT(0x4709), + /* CPSW9 */ + PSIL_ETHERNET(0x4a00), + /* CPSW0 */ + PSIL_ETHERNET(0x7000), + /* MCU_PDMA0 (MCU_PDMA_MISC_G0) - SPI0 */ + PSIL_PDMA_XY_PKT(0x7100), + PSIL_PDMA_XY_PKT(0x7101), + PSIL_PDMA_XY_PKT(0x7102), + PSIL_PDMA_XY_PKT(0x7103), + /* MCU_PDMA1 (MCU_PDMA_MISC_G1) - SPI1-2 */ + PSIL_PDMA_XY_PKT(0x7200), + PSIL_PDMA_XY_PKT(0x7201), + PSIL_PDMA_XY_PKT(0x7202), + PSIL_PDMA_XY_PKT(0x7203), + PSIL_PDMA_XY_PKT(0x7204), + PSIL_PDMA_XY_PKT(0x7205), + PSIL_PDMA_XY_PKT(0x7206), + PSIL_PDMA_XY_PKT(0x7207), + /* MCU_PDMA2 (MCU_PDMA_MISC_G2) - UART0 */ + PSIL_PDMA_XY_PKT(0x7300), + /* MCU_PDMA_ADC - ADC0-1 */ + PSIL_PDMA_XY_TR(0x7400), + PSIL_PDMA_XY_TR(0x7401), + PSIL_PDMA_XY_TR(0x7402), + PSIL_PDMA_XY_TR(0x7403), + /* SA2UL */ + PSIL_SA2UL(0x7500, 0), + PSIL_SA2UL(0x7501, 0), +}; + +/* PSI-L destination thread IDs, used for TX (DMA_MEM_TO_DEV) */ +struct psil_ep j721e_dst_ep_map[] = { + /* SA2UL */ + PSIL_SA2UL(0xc000, 1), + PSIL_SA2UL(0xc001, 1), + /* PRU_ICSSG0 */ + PSIL_ETHERNET(0xc100), + PSIL_ETHERNET(0xc101), + PSIL_ETHERNET(0xc102), + PSIL_ETHERNET(0xc103), + PSIL_ETHERNET(0xc104), + PSIL_ETHERNET(0xc105), + PSIL_ETHERNET(0xc106), + PSIL_ETHERNET(0xc107), + /* PRU_ICSSG1 */ + PSIL_ETHERNET(0xc200), + PSIL_ETHERNET(0xc201), + PSIL_ETHERNET(0xc202), + PSIL_ETHERNET(0xc203), + PSIL_ETHERNET(0xc204), + PSIL_ETHERNET(0xc205), + PSIL_ETHERNET(0xc206), + PSIL_ETHERNET(0xc207), + /* CPSW9 */ + PSIL_ETHERNET(0xca00), + PSIL_ETHERNET(0xca01), + PSIL_ETHERNET(0xca02), + PSIL_ETHERNET(0xca03), + PSIL_ETHERNET(0xca04), + PSIL_ETHERNET(0xca05), + PSIL_ETHERNET(0xca06), + PSIL_ETHERNET(0xca07), + /* CPSW0 */ + PSIL_ETHERNET(0xf000), + PSIL_ETHERNET(0xf001), + PSIL_ETHERNET(0xf002), + PSIL_ETHERNET(0xf003), + PSIL_ETHERNET(0xf004), + PSIL_ETHERNET(0xf005), + PSIL_ETHERNET(0xf006), + PSIL_ETHERNET(0xf007), + /* SA2UL */ + PSIL_SA2UL(0xf500, 1), +}; + +struct psil_ep_map j721e_ep_map = { + .name = "j721e", + .src = j721e_src_ep_map, + .src_count = ARRAY_SIZE(j721e_src_ep_map), + .dst = j721e_dst_ep_map, + .dst_count = ARRAY_SIZE(j721e_dst_ep_map), +}; diff --git a/drivers/dma/ti/k3-psil-priv.h b/drivers/dma/ti/k3-psil-priv.h new file mode 100644 index 000000000000..f74420653d8a --- /dev/null +++ b/drivers/dma/ti/k3-psil-priv.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com + */ + +#ifndef K3_PSIL_PRIV_H_ +#define K3_PSIL_PRIV_H_ + +#include + +struct psil_ep { + u32 thread_id; + struct psil_endpoint_config ep_config; +}; + +/** + * struct psil_ep_map - PSI-L thread ID configuration maps + * @name: Name of the map, set it to the name of the SoC + * @src: Array of source PSI-L thread configurations + * @src_count: Number of entries in the src array + * @dst: Array of destination PSI-L thread configurations + * @dst_count: Number of entries in the dst array + * + * In case of symmetric configuration for a matching src/dst thread (for example + * 0x4400 and 0xc400) only the src configuration can be present. If no dst + * configuration found the code will look for (dst_thread_id & ~0x8000) to find + * the symmetric match. + */ +struct psil_ep_map { + char *name; + struct psil_ep *src; + int src_count; + struct psil_ep *dst; + int dst_count; +}; + +struct psil_endpoint_config *psil_get_ep_config(u32 thread_id); + +#endif /* K3_PSIL_PRIV_H_ */ diff --git a/drivers/dma/ti/k3-psil.c b/drivers/dma/ti/k3-psil.c new file mode 100644 index 000000000000..9314cf9a52e4 --- /dev/null +++ b/drivers/dma/ti/k3-psil.c @@ -0,0 +1,93 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com + * Author: Peter Ujfalusi + */ + +#include +#include +#include +#include +#include + +#include "k3-psil-priv.h" + +extern struct psil_ep_map am654_ep_map; +extern struct psil_ep_map j721e_ep_map; + +static DEFINE_MUTEX(ep_map_mutex); +static struct psil_ep_map *soc_ep_map; + +struct psil_endpoint_config *psil_get_ep_config(u32 thread_id) +{ + int i; + + mutex_lock(&ep_map_mutex); + if (!soc_ep_map) { + if (of_machine_is_compatible("ti,am654")) { + soc_ep_map = &am654_ep_map; + } else if (of_machine_is_compatible("ti,j721e")) { + soc_ep_map = &j721e_ep_map; + } else { + pr_err("PSIL: No compatible machine found for map\n"); + return ERR_PTR(-ENOTSUPP); + } + pr_debug("%s: Using map for %s\n", __func__, soc_ep_map->name); + } + mutex_unlock(&ep_map_mutex); + + if (thread_id & K3_PSIL_DST_THREAD_ID_OFFSET && soc_ep_map->dst) { + /* check in destination thread map */ + for (i = 0; i < soc_ep_map->dst_count; i++) { + if (soc_ep_map->dst[i].thread_id == thread_id) + return &soc_ep_map->dst[i].ep_config; + } + } + + thread_id &= ~K3_PSIL_DST_THREAD_ID_OFFSET; + if (soc_ep_map->src) { + for (i = 0; i < soc_ep_map->src_count; i++) { + if (soc_ep_map->src[i].thread_id == thread_id) + return &soc_ep_map->src[i].ep_config; + } + } + + return ERR_PTR(-ENOENT); +} +EXPORT_SYMBOL_GPL(psil_get_ep_config); + +int psil_set_new_ep_config(struct device *dev, const char *name, + struct psil_endpoint_config *ep_config) +{ + struct psil_endpoint_config *dst_ep_config; + struct of_phandle_args dma_spec; + u32 thread_id; + int index; + + if (!dev || !dev->of_node) + return -EINVAL; + + index = of_property_match_string(dev->of_node, "dma-names", name); + if (index < 0) + return index; + + if (of_parse_phandle_with_args(dev->of_node, "dmas", "#dma-cells", + index, &dma_spec)) + return -ENOENT; + + thread_id = dma_spec.args[0]; + + dst_ep_config = psil_get_ep_config(thread_id); + if (IS_ERR(dst_ep_config)) { + pr_err("PSIL: thread ID 0x%04x not defined in map\n", + thread_id); + of_node_put(dma_spec.np); + return PTR_ERR(dst_ep_config); + } + + memcpy(dst_ep_config, ep_config, sizeof(*dst_ep_config)); + + of_node_put(dma_spec.np); + return 0; +} +EXPORT_SYMBOL_GPL(psil_set_new_ep_config); diff --git a/include/linux/dma/k3-psil.h b/include/linux/dma/k3-psil.h new file mode 100644 index 000000000000..61d5cc0ad601 --- /dev/null +++ b/include/linux/dma/k3-psil.h @@ -0,0 +1,71 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com + */ + +#ifndef K3_PSIL_H_ +#define K3_PSIL_H_ + +#include + +#define K3_PSIL_DST_THREAD_ID_OFFSET 0x8000 + +struct device; + +/** + * enum udma_tp_level - Channel Throughput Levels + * @UDMA_TP_NORMAL: Normal channel + * @UDMA_TP_HIGH: High Throughput channel + * @UDMA_TP_ULTRAHIGH: Ultra High Throughput channel + */ +enum udma_tp_level { + UDMA_TP_NORMAL = 0, + UDMA_TP_HIGH, + UDMA_TP_ULTRAHIGH, + UDMA_TP_LAST, +}; + +/** + * enum psil_endpoint_type - PSI-L Endpoint type + * @PSIL_EP_NATIVE: Normal channel + * @PSIL_EP_PDMA_XY: XY mode PDMA + * @PSIL_EP_PDMA_MCAN: MCAN mode PDMA + * @PSIL_EP_PDMA_AASRC: AASRC mode PDMA + */ +enum psil_endpoint_type { + PSIL_EP_NATIVE = 0, + PSIL_EP_PDMA_XY, + PSIL_EP_PDMA_MCAN, + PSIL_EP_PDMA_AASRC, +}; + +/** + * struct psil_endpoint_config - PSI-L Endpoint configuration + * @ep_type: PSI-L endpoint type + * @pkt_mode: If set, the channel must be in Packet mode, otherwise in + * TR mode + * @notdpkt: TDCM must be suppressed on the TX channel + * @needs_epib: Endpoint needs EPIB + * @psd_size: If set, PSdata is used by the endpoint + * @channel_tpl: Desired throughput level for the channel + * @pdma_acc32: ACC32 must be enabled on the PDMA side + * @pdma_burst: BURST must be enabled on the PDMA side + */ +struct psil_endpoint_config { + enum psil_endpoint_type ep_type; + + unsigned pkt_mode:1; + unsigned notdpkt:1; + unsigned needs_epib:1; + u32 psd_size; + enum udma_tp_level channel_tpl; + + /* PDMA properties, valid for PSIL_EP_PDMA_* */ + unsigned pdma_acc32:1; + unsigned pdma_burst:1; +}; + +int psil_set_new_ep_config(struct device *dev, const char *name, + struct psil_endpoint_config *ep_config); + +#endif /* K3_PSIL_H_ */ From patchwork Mon Dec 23 11:04:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 182386 Delivered-To: patch@linaro.org Received: by 2002:a92:a146:0:0:0:0:0 with SMTP id v67csp276999ili; Mon, 23 Dec 2019 03:05:55 -0800 (PST) X-Google-Smtp-Source: APXvYqxVnEGBMz2/30fjK19vQYzIZnum6gGTfTSJCbPafUniHmufd8nJb82QdlRU9L/bNrDrbjZc X-Received: by 2002:aca:cf83:: with SMTP id f125mr5549437oig.15.1577099155000; Mon, 23 Dec 2019 03:05:55 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1577099154; cv=none; d=google.com; s=arc-20160816; b=WztzJPUXnzUKfHRs+fS0EYksCq3oJJ+ghocNgDn03lrNl26wlKKDLtAWYtDGbvTfVR ZOr9ks88torHowdGFZeSrnADNul1jGQ7EpNbSJ2Nw4F4jPzGTfCLQILAMnTyqCmLKeuC 9PVhJCOyfRFEBY9kk1yRhFRGyfLMLWx4LnEeCUeG4D1IV5nyFaZoYt5IuMjw16o10m0J OCqSkqsQTXLJdEjBJ/Z4Z+7wBmLJ+WymV+nmrwSz+SSvdH4VhWbyPZsNY7SBzfYQCodI 2MpYbntN86m4kco81QhbtOUDhTBIMGZpkuPBhYZJl+l3dY/91hPuFtDpKgfeTCAje558 APJQ== ARC-Message-Signature: i=1; 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[209.132.180.67]) by mx.google.com with ESMTP id l186si6714198oib.226.2019.12.23.03.05.54; Mon, 23 Dec 2019 03:05:54 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of dmaengine-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=jDjFK6kg; spf=pass (google.com: best guess record for domain of dmaengine-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=dmaengine-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727105AbfLWLFy (ORCPT + 3 others); Mon, 23 Dec 2019 06:05:54 -0500 Received: from lelv0142.ext.ti.com ([198.47.23.249]:44714 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726666AbfLWLFt (ORCPT ); Mon, 23 Dec 2019 06:05:49 -0500 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id xBNB5Pbk110615; Mon, 23 Dec 2019 05:05:25 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1577099125; bh=ORhVFdAR4VufFCDPhquIes+MleuQsimE0l6uo6vn4cg=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=jDjFK6kgLGjEVQXfEeaNa4bJcj4ZW0F5ouW9IPYBHXSTEkuCdjbrjrDB7fB7Y22H6 b0qdaPkZHKbUMzDXrB5tVD5wMZrTQ/pdv6o9FauC/wxy0+usG3OIS+Khb0u8Zy1jkO uVMfMDErwKKD+2+JK3CgC8WDjc1rclLxAcMJNlOk= Received: from DFLE105.ent.ti.com (dfle105.ent.ti.com [10.64.6.26]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id xBNB5PlB041009 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 23 Dec 2019 05:05:25 -0600 Received: from DFLE103.ent.ti.com (10.64.6.24) by DFLE105.ent.ti.com (10.64.6.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Mon, 23 Dec 2019 05:05:23 -0600 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE103.ent.ti.com (10.64.6.24) 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; Mon, 23 Dec 2019 05:05:23 -0600 Received: from feketebors.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id xBNB4eMH025693; Mon, 23 Dec 2019 05:05:20 -0600 From: Peter Ujfalusi To: , , , CC: , , , , , , , , , , , Subject: [PATCH v8 10/18] dmaengine: ti: New driver for K3 UDMA Date: Mon, 23 Dec 2019 13:04:50 +0200 Message-ID: <20191223110458.30766-11-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191223110458.30766-1-peter.ujfalusi@ti.com> References: <20191223110458.30766-1-peter.ujfalusi@ti.com> MIME-Version: 1.0 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 Split patch for review containing: defines, structs, io and low level functions and interrupt callbacks. DMA driver for Texas Instruments K3 NAVSS Unified DMA – Peripheral Root Complex (UDMA-P) The UDMA-P is intended to perform similar (but significantly upgraded) functions as the packet-oriented DMA used on previous SoC devices. The UDMA-P module supports the transmission and reception of various packet types. The UDMA-P is architected to facilitate the segmentation and reassembly of SoC DMA data structure compliant packets to/from smaller data blocks that are natively compatible with the specific requirements of each connected peripheral. Multiple Tx and Rx channels are provided within the DMA which allow multiple segmentation or reassembly operations to be ongoing. The DMA controller maintains state information for each of the channels which allows packet segmentation and reassembly operations to be time division multiplexed between channels in order to share the underlying DMA hardware. An external DMA scheduler is used to control the ordering and rate at which this multiplexing occurs for Transmit operations. The ordering and rate of Receive operations is indirectly controlled by the order in which blocks are pushed into the DMA on the Rx PSI-L interface. The UDMA-P also supports acting as both a UTC and UDMA-C for its internal channels. Channels in the UDMA-P can be configured to be either Packet-Based or Third-Party channels on a channel by channel basis. The initial driver supports: - MEM_TO_MEM (TR mode) - DEV_TO_MEM (Packet / TR mode) - MEM_TO_DEV (Packet / TR mode) - Cyclic (Packet / TR mode) - Metadata for descriptors Signed-off-by: Peter Ujfalusi Tested-by: Keerthy Reviewed-by: Grygorii Strashko --- drivers/dma/ti/Kconfig | 13 + drivers/dma/ti/Makefile | 1 + drivers/dma/ti/k3-udma.c | 3371 ++++++++++++++++++++++++++++++++++++++ drivers/dma/ti/k3-udma.h | 120 ++ 4 files changed, 3505 insertions(+) create mode 100644 drivers/dma/ti/k3-udma.c create mode 100644 drivers/dma/ti/k3-udma.h -- Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki diff --git a/drivers/dma/ti/Kconfig b/drivers/dma/ti/Kconfig index 72f3d2728178..cca6708bd77c 100644 --- a/drivers/dma/ti/Kconfig +++ b/drivers/dma/ti/Kconfig @@ -34,6 +34,19 @@ config DMA_OMAP Enable support for the TI sDMA (System DMA or DMA4) controller. This DMA engine is found on OMAP and DRA7xx parts. +config TI_K3_UDMA + bool "Texas Instruments UDMA support" + depends on ARCH_K3 || COMPILE_TEST + depends on TI_SCI_PROTOCOL + depends on TI_SCI_INTA_IRQCHIP + select DMA_ENGINE + select DMA_VIRTUAL_CHANNELS + select TI_K3_RINGACC + select TI_K3_PSIL + help + Enable support for the TI UDMA (Unified DMA) controller. This + DMA engine is used in AM65x and j721e. + config TI_K3_PSIL bool diff --git a/drivers/dma/ti/Makefile b/drivers/dma/ti/Makefile index f8d912ad7eaf..9d787f009195 100644 --- a/drivers/dma/ti/Makefile +++ b/drivers/dma/ti/Makefile @@ -2,5 +2,6 @@ obj-$(CONFIG_TI_CPPI41) += cppi41.o obj-$(CONFIG_TI_EDMA) += edma.o obj-$(CONFIG_DMA_OMAP) += omap-dma.o +obj-$(CONFIG_TI_K3_UDMA) += k3-udma.o obj-$(CONFIG_TI_K3_PSIL) += k3-psil.o k3-psil-am654.o k3-psil-j721e.o obj-$(CONFIG_TI_DMA_CROSSBAR) += dma-crossbar.o diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c new file mode 100644 index 000000000000..14f8f8c75d3a --- /dev/null +++ b/drivers/dma/ti/k3-udma.c @@ -0,0 +1,3371 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com + * Author: Peter Ujfalusi + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "../virt-dma.h" +#include "k3-udma.h" +#include "k3-psil-priv.h" + +struct udma_static_tr { + u8 elsize; /* RPSTR0 */ + u16 elcnt; /* RPSTR0 */ + u16 bstcnt; /* RPSTR1 */ +}; + +#define K3_UDMA_MAX_RFLOWS 1024 +#define K3_UDMA_DEFAULT_RING_SIZE 16 + +/* How SRC/DST tag should be updated by UDMA in the descriptor's Word 3 */ +#define UDMA_RFLOW_SRCTAG_NONE 0 +#define UDMA_RFLOW_SRCTAG_CFG_TAG 1 +#define UDMA_RFLOW_SRCTAG_FLOW_ID 2 +#define UDMA_RFLOW_SRCTAG_SRC_TAG 4 + +#define UDMA_RFLOW_DSTTAG_NONE 0 +#define UDMA_RFLOW_DSTTAG_CFG_TAG 1 +#define UDMA_RFLOW_DSTTAG_FLOW_ID 2 +#define UDMA_RFLOW_DSTTAG_DST_TAG_LO 4 +#define UDMA_RFLOW_DSTTAG_DST_TAG_HI 5 + +struct udma_chan; + +enum udma_mmr { + MMR_GCFG = 0, + MMR_RCHANRT, + MMR_TCHANRT, + MMR_LAST, +}; + +static const char * const mmr_names[] = { "gcfg", "rchanrt", "tchanrt" }; + +struct udma_tchan { + void __iomem *reg_rt; + + int id; + struct k3_ring *t_ring; /* Transmit ring */ + struct k3_ring *tc_ring; /* Transmit Completion ring */ +}; + +struct udma_rflow { + int id; + struct k3_ring *fd_ring; /* Free Descriptor ring */ + struct k3_ring *r_ring; /* Receive ring */ +}; + +struct udma_rchan { + void __iomem *reg_rt; + + int id; +}; + +#define UDMA_FLAG_PDMA_ACC32 BIT(0) +#define UDMA_FLAG_PDMA_BURST BIT(1) + +struct udma_match_data { + u32 psil_base; + bool enable_memcpy_support; + u32 flags; + u32 statictr_z_mask; + u32 rchan_oes_offset; + + u8 tpl_levels; + u32 level_start_idx[]; +}; + +struct udma_dev { + struct dma_device ddev; + struct device *dev; + void __iomem *mmrs[MMR_LAST]; + const struct udma_match_data *match_data; + + size_t desc_align; /* alignment to use for descriptors */ + + struct udma_tisci_rm tisci_rm; + + struct k3_ringacc *ringacc; + + struct work_struct purge_work; + struct list_head desc_to_purge; + spinlock_t lock; + + int tchan_cnt; + int echan_cnt; + int rchan_cnt; + int rflow_cnt; + unsigned long *tchan_map; + unsigned long *rchan_map; + unsigned long *rflow_gp_map; + unsigned long *rflow_gp_map_allocated; + unsigned long *rflow_in_use; + + struct udma_tchan *tchans; + struct udma_rchan *rchans; + struct udma_rflow *rflows; + + struct udma_chan *channels; + u32 psil_base; +}; + +struct udma_hwdesc { + size_t cppi5_desc_size; + void *cppi5_desc_vaddr; + dma_addr_t cppi5_desc_paddr; + + /* TR descriptor internal pointers */ + void *tr_req_base; + struct cppi5_tr_resp_t *tr_resp_base; +}; + +struct udma_desc { + struct virt_dma_desc vd; + + bool terminated; + + enum dma_transfer_direction dir; + + struct udma_static_tr static_tr; + u32 residue; + + unsigned int sglen; + unsigned int desc_idx; /* Only used for cyclic in packet mode */ + unsigned int tr_idx; + + u32 metadata_size; + void *metadata; /* pointer to provided metadata buffer (EPIP, PSdata) */ + + unsigned int hwdesc_count; + struct udma_hwdesc hwdesc[0]; +}; + +enum udma_chan_state { + UDMA_CHAN_IS_IDLE = 0, /* not active, no teardown is in progress */ + UDMA_CHAN_IS_ACTIVE, /* Normal operation */ + UDMA_CHAN_IS_TERMINATING, /* channel is being terminated */ +}; + +struct udma_tx_drain { + struct delayed_work work; + unsigned long jiffie; + u32 residue; +}; + +struct udma_chan_config { + bool pkt_mode; /* TR or packet */ + bool needs_epib; /* EPIB is needed for the communication or not */ + u32 psd_size; /* size of Protocol Specific Data */ + u32 metadata_size; /* (needs_epib ? 16:0) + psd_size */ + u32 hdesc_size; /* Size of a packet descriptor in packet mode */ + bool notdpkt; /* Suppress sending TDC packet */ + int remote_thread_id; + u32 src_thread; + u32 dst_thread; + enum psil_endpoint_type ep_type; + bool enable_acc32; + bool enable_burst; + enum udma_tp_level channel_tpl; /* Channel Throughput Level */ + + enum dma_transfer_direction dir; +}; + +struct udma_chan { + struct virt_dma_chan vc; + struct dma_slave_config cfg; + struct udma_dev *ud; + struct udma_desc *desc; + struct udma_desc *terminated_desc; + struct udma_static_tr static_tr; + char *name; + + struct udma_tchan *tchan; + struct udma_rchan *rchan; + struct udma_rflow *rflow; + + bool psil_paired; + + int irq_num_ring; + int irq_num_udma; + + bool cyclic; + bool paused; + + enum udma_chan_state state; + struct completion teardown_completed; + + struct udma_tx_drain tx_drain; + + u32 bcnt; /* number of bytes completed since the start of the channel */ + u32 in_ring_cnt; /* number of descriptors in flight */ + + /* Channel configuration parameters */ + struct udma_chan_config config; + + /* dmapool for packet mode descriptors */ + bool use_dma_pool; + struct dma_pool *hdesc_pool; + + u32 id; +}; + +static inline struct udma_dev *to_udma_dev(struct dma_device *d) +{ + return container_of(d, struct udma_dev, ddev); +} + +static inline struct udma_chan *to_udma_chan(struct dma_chan *c) +{ + return container_of(c, struct udma_chan, vc.chan); +} + +static inline struct udma_desc *to_udma_desc(struct dma_async_tx_descriptor *t) +{ + return container_of(t, struct udma_desc, vd.tx); +} + +/* Generic register access functions */ +static inline u32 udma_read(void __iomem *base, int reg) +{ + return readl(base + reg); +} + +static inline void udma_write(void __iomem *base, int reg, u32 val) +{ + writel(val, base + reg); +} + +static inline void udma_update_bits(void __iomem *base, int reg, + u32 mask, u32 val) +{ + u32 tmp, orig; + + orig = readl(base + reg); + tmp = orig & ~mask; + tmp |= (val & mask); + + if (tmp != orig) + writel(tmp, base + reg); +} + +/* TCHANRT */ +static inline u32 udma_tchanrt_read(struct udma_tchan *tchan, int reg) +{ + if (!tchan) + return 0; + return udma_read(tchan->reg_rt, reg); +} + +static inline void udma_tchanrt_write(struct udma_tchan *tchan, int reg, + u32 val) +{ + if (!tchan) + return; + udma_write(tchan->reg_rt, reg, val); +} + +static inline void udma_tchanrt_update_bits(struct udma_tchan *tchan, int reg, + u32 mask, u32 val) +{ + if (!tchan) + return; + udma_update_bits(tchan->reg_rt, reg, mask, val); +} + +/* RCHANRT */ +static inline u32 udma_rchanrt_read(struct udma_rchan *rchan, int reg) +{ + if (!rchan) + return 0; + return udma_read(rchan->reg_rt, reg); +} + +static inline void udma_rchanrt_write(struct udma_rchan *rchan, int reg, + u32 val) +{ + if (!rchan) + return; + udma_write(rchan->reg_rt, reg, val); +} + +static inline void udma_rchanrt_update_bits(struct udma_rchan *rchan, int reg, + u32 mask, u32 val) +{ + if (!rchan) + return; + udma_update_bits(rchan->reg_rt, reg, mask, val); +} + +static int navss_psil_pair(struct udma_dev *ud, u32 src_thread, u32 dst_thread) +{ + struct udma_tisci_rm *tisci_rm = &ud->tisci_rm; + + dst_thread |= K3_PSIL_DST_THREAD_ID_OFFSET; + return tisci_rm->tisci_psil_ops->pair(tisci_rm->tisci, + tisci_rm->tisci_navss_dev_id, + src_thread, dst_thread); +} + +static int navss_psil_unpair(struct udma_dev *ud, u32 src_thread, + u32 dst_thread) +{ + struct udma_tisci_rm *tisci_rm = &ud->tisci_rm; + + dst_thread |= K3_PSIL_DST_THREAD_ID_OFFSET; + return tisci_rm->tisci_psil_ops->unpair(tisci_rm->tisci, + tisci_rm->tisci_navss_dev_id, + src_thread, dst_thread); +} + +static void udma_reset_uchan(struct udma_chan *uc) +{ + memset(&uc->config, 0, sizeof(uc->config)); + uc->config.remote_thread_id = -1; + uc->state = UDMA_CHAN_IS_IDLE; +} + +static void udma_dump_chan_stdata(struct udma_chan *uc) +{ + struct device *dev = uc->ud->dev; + u32 offset; + int i; + + if (uc->config.dir == DMA_MEM_TO_DEV || uc->config.dir == DMA_MEM_TO_MEM) { + dev_dbg(dev, "TCHAN State data:\n"); + for (i = 0; i < 32; i++) { + offset = UDMA_TCHAN_RT_STDATA_REG + i * 4; + dev_dbg(dev, "TRT_STDATA[%02d]: 0x%08x\n", i, + udma_tchanrt_read(uc->tchan, offset)); + } + } + + if (uc->config.dir == DMA_DEV_TO_MEM || uc->config.dir == DMA_MEM_TO_MEM) { + dev_dbg(dev, "RCHAN State data:\n"); + for (i = 0; i < 32; i++) { + offset = UDMA_RCHAN_RT_STDATA_REG + i * 4; + dev_dbg(dev, "RRT_STDATA[%02d]: 0x%08x\n", i, + udma_rchanrt_read(uc->rchan, offset)); + } + } +} + +static inline dma_addr_t udma_curr_cppi5_desc_paddr(struct udma_desc *d, + int idx) +{ + return d->hwdesc[idx].cppi5_desc_paddr; +} + +static inline void *udma_curr_cppi5_desc_vaddr(struct udma_desc *d, int idx) +{ + return d->hwdesc[idx].cppi5_desc_vaddr; +} + +static struct udma_desc *udma_udma_desc_from_paddr(struct udma_chan *uc, + dma_addr_t paddr) +{ + struct udma_desc *d = uc->terminated_desc; + + if (d) { + dma_addr_t desc_paddr = udma_curr_cppi5_desc_paddr(d, + d->desc_idx); + + if (desc_paddr != paddr) + d = NULL; + } + + if (!d) { + d = uc->desc; + if (d) { + dma_addr_t desc_paddr = udma_curr_cppi5_desc_paddr(d, + d->desc_idx); + + if (desc_paddr != paddr) + d = NULL; + } + } + + return d; +} + +static void udma_free_hwdesc(struct udma_chan *uc, struct udma_desc *d) +{ + if (uc->use_dma_pool) { + int i; + + for (i = 0; i < d->hwdesc_count; i++) { + if (!d->hwdesc[i].cppi5_desc_vaddr) + continue; + + dma_pool_free(uc->hdesc_pool, + d->hwdesc[i].cppi5_desc_vaddr, + d->hwdesc[i].cppi5_desc_paddr); + + d->hwdesc[i].cppi5_desc_vaddr = NULL; + } + } else if (d->hwdesc[0].cppi5_desc_vaddr) { + struct udma_dev *ud = uc->ud; + + dma_free_coherent(ud->dev, d->hwdesc[0].cppi5_desc_size, + d->hwdesc[0].cppi5_desc_vaddr, + d->hwdesc[0].cppi5_desc_paddr); + + d->hwdesc[0].cppi5_desc_vaddr = NULL; + } +} + +static void udma_purge_desc_work(struct work_struct *work) +{ + struct udma_dev *ud = container_of(work, typeof(*ud), purge_work); + struct virt_dma_desc *vd, *_vd; + unsigned long flags; + LIST_HEAD(head); + + spin_lock_irqsave(&ud->lock, flags); + list_splice_tail_init(&ud->desc_to_purge, &head); + spin_unlock_irqrestore(&ud->lock, flags); + + list_for_each_entry_safe(vd, _vd, &head, node) { + struct udma_chan *uc = to_udma_chan(vd->tx.chan); + struct udma_desc *d = to_udma_desc(&vd->tx); + + udma_free_hwdesc(uc, d); + list_del(&vd->node); + kfree(d); + } + + /* If more to purge, schedule the work again */ + if (!list_empty(&ud->desc_to_purge)) + schedule_work(&ud->purge_work); +} + +static void udma_desc_free(struct virt_dma_desc *vd) +{ + struct udma_dev *ud = to_udma_dev(vd->tx.chan->device); + struct udma_chan *uc = to_udma_chan(vd->tx.chan); + struct udma_desc *d = to_udma_desc(&vd->tx); + unsigned long flags; + + if (uc->terminated_desc == d) + uc->terminated_desc = NULL; + + if (uc->use_dma_pool) { + udma_free_hwdesc(uc, d); + kfree(d); + return; + } + + spin_lock_irqsave(&ud->lock, flags); + list_add_tail(&vd->node, &ud->desc_to_purge); + spin_unlock_irqrestore(&ud->lock, flags); + + schedule_work(&ud->purge_work); +} + +static bool udma_is_chan_running(struct udma_chan *uc) +{ + u32 trt_ctl = 0; + u32 rrt_ctl = 0; + + if (uc->tchan) + trt_ctl = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_CTL_REG); + if (uc->rchan) + rrt_ctl = udma_rchanrt_read(uc->rchan, UDMA_RCHAN_RT_CTL_REG); + + if (trt_ctl & UDMA_CHAN_RT_CTL_EN || rrt_ctl & UDMA_CHAN_RT_CTL_EN) + return true; + + return false; +} + +static bool udma_is_chan_paused(struct udma_chan *uc) +{ + u32 val, pause_mask; + + switch (uc->desc->dir) { + case DMA_DEV_TO_MEM: + val = udma_rchanrt_read(uc->rchan, + UDMA_RCHAN_RT_PEER_RT_EN_REG); + pause_mask = UDMA_PEER_RT_EN_PAUSE; + break; + case DMA_MEM_TO_DEV: + val = udma_tchanrt_read(uc->tchan, + UDMA_TCHAN_RT_PEER_RT_EN_REG); + pause_mask = UDMA_PEER_RT_EN_PAUSE; + break; + case DMA_MEM_TO_MEM: + val = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_CTL_REG); + pause_mask = UDMA_CHAN_RT_CTL_PAUSE; + break; + default: + return false; + } + + if (val & pause_mask) + return true; + + return false; +} + +static void udma_sync_for_device(struct udma_chan *uc, int idx) +{ + struct udma_desc *d = uc->desc; + + if (uc->cyclic && uc->config.pkt_mode) { + dma_sync_single_for_device(uc->ud->dev, + d->hwdesc[idx].cppi5_desc_paddr, + d->hwdesc[idx].cppi5_desc_size, + DMA_TO_DEVICE); + } else { + int i; + + for (i = 0; i < d->hwdesc_count; i++) { + if (!d->hwdesc[i].cppi5_desc_vaddr) + continue; + + dma_sync_single_for_device(uc->ud->dev, + d->hwdesc[i].cppi5_desc_paddr, + d->hwdesc[i].cppi5_desc_size, + DMA_TO_DEVICE); + } + } +} + +static int udma_push_to_ring(struct udma_chan *uc, int idx) +{ + struct udma_desc *d = uc->desc; + + struct k3_ring *ring = NULL; + int ret = -EINVAL; + + switch (uc->config.dir) { + case DMA_DEV_TO_MEM: + ring = uc->rflow->fd_ring; + break; + case DMA_MEM_TO_DEV: + case DMA_MEM_TO_MEM: + ring = uc->tchan->t_ring; + break; + default: + break; + } + + if (ring) { + dma_addr_t desc_addr = udma_curr_cppi5_desc_paddr(d, idx); + + wmb(); /* Ensure that writes are not moved over this point */ + udma_sync_for_device(uc, idx); + ret = k3_ringacc_ring_push(ring, &desc_addr); + uc->in_ring_cnt++; + } + + return ret; +} + +static int udma_pop_from_ring(struct udma_chan *uc, dma_addr_t *addr) +{ + struct k3_ring *ring = NULL; + int ret = -ENOENT; + + switch (uc->config.dir) { + case DMA_DEV_TO_MEM: + ring = uc->rflow->r_ring; + break; + case DMA_MEM_TO_DEV: + case DMA_MEM_TO_MEM: + ring = uc->tchan->tc_ring; + break; + default: + break; + } + + if (ring && k3_ringacc_ring_get_occ(ring)) { + struct udma_desc *d = NULL; + + ret = k3_ringacc_ring_pop(ring, addr); + if (ret) + return ret; + + /* Teardown completion */ + if (cppi5_desc_is_tdcm(*addr)) + return ret; + + d = udma_udma_desc_from_paddr(uc, *addr); + + if (d) + dma_sync_single_for_cpu(uc->ud->dev, *addr, + d->hwdesc[0].cppi5_desc_size, + DMA_FROM_DEVICE); + rmb(); /* Ensure that reads are not moved before this point */ + + if (!ret) + uc->in_ring_cnt--; + } + + return ret; +} + +static void udma_reset_rings(struct udma_chan *uc) +{ + struct k3_ring *ring1 = NULL; + struct k3_ring *ring2 = NULL; + + switch (uc->config.dir) { + case DMA_DEV_TO_MEM: + if (uc->rchan) { + ring1 = uc->rflow->fd_ring; + ring2 = uc->rflow->r_ring; + } + break; + case DMA_MEM_TO_DEV: + case DMA_MEM_TO_MEM: + if (uc->tchan) { + ring1 = uc->tchan->t_ring; + ring2 = uc->tchan->tc_ring; + } + break; + default: + break; + } + + if (ring1) + k3_ringacc_ring_reset_dma(ring1, + k3_ringacc_ring_get_occ(ring1)); + if (ring2) + k3_ringacc_ring_reset(ring2); + + /* make sure we are not leaking memory by stalled descriptor */ + if (uc->terminated_desc) { + udma_desc_free(&uc->terminated_desc->vd); + uc->terminated_desc = NULL; + } + + uc->in_ring_cnt = 0; +} + +static void udma_reset_counters(struct udma_chan *uc) +{ + u32 val; + + if (uc->tchan) { + val = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_BCNT_REG); + udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_BCNT_REG, val); + + val = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_SBCNT_REG); + udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_SBCNT_REG, val); + + val = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_PCNT_REG); + udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_PCNT_REG, val); + + val = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_PEER_BCNT_REG); + udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_PEER_BCNT_REG, val); + } + + if (uc->rchan) { + val = udma_rchanrt_read(uc->rchan, UDMA_RCHAN_RT_BCNT_REG); + udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_BCNT_REG, val); + + val = udma_rchanrt_read(uc->rchan, UDMA_RCHAN_RT_SBCNT_REG); + udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_SBCNT_REG, val); + + val = udma_rchanrt_read(uc->rchan, UDMA_RCHAN_RT_PCNT_REG); + udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_PCNT_REG, val); + + val = udma_rchanrt_read(uc->rchan, UDMA_RCHAN_RT_PEER_BCNT_REG); + udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_PEER_BCNT_REG, val); + } + + uc->bcnt = 0; +} + +static int udma_reset_chan(struct udma_chan *uc, bool hard) +{ + switch (uc->config.dir) { + case DMA_DEV_TO_MEM: + udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_PEER_RT_EN_REG, 0); + udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_CTL_REG, 0); + break; + case DMA_MEM_TO_DEV: + udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_CTL_REG, 0); + udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_PEER_RT_EN_REG, 0); + break; + case DMA_MEM_TO_MEM: + udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_CTL_REG, 0); + udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_CTL_REG, 0); + break; + default: + return -EINVAL; + } + + /* Reset all counters */ + udma_reset_counters(uc); + + /* Hard reset: re-initialize the channel to reset */ + if (hard) { + struct udma_chan_config ucc_backup; + int ret; + + memcpy(&ucc_backup, &uc->config, sizeof(uc->config)); + uc->ud->ddev.device_free_chan_resources(&uc->vc.chan); + + /* restore the channel configuration */ + memcpy(&uc->config, &ucc_backup, sizeof(uc->config)); + ret = uc->ud->ddev.device_alloc_chan_resources(&uc->vc.chan); + if (ret) + return ret; + + /* + * Setting forced teardown after forced reset helps recovering + * the rchan. + */ + if (uc->config.dir == DMA_DEV_TO_MEM) + udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_CTL_REG, + UDMA_CHAN_RT_CTL_EN | + UDMA_CHAN_RT_CTL_TDOWN | + UDMA_CHAN_RT_CTL_FTDOWN); + } + uc->state = UDMA_CHAN_IS_IDLE; + + return 0; +} + +static void udma_start_desc(struct udma_chan *uc) +{ + struct udma_chan_config *ucc = &uc->config; + + if (ucc->pkt_mode && (uc->cyclic || ucc->dir == DMA_DEV_TO_MEM)) { + int i; + + /* Push all descriptors to ring for packet mode cyclic or RX */ + for (i = 0; i < uc->desc->sglen; i++) + udma_push_to_ring(uc, i); + } else { + udma_push_to_ring(uc, 0); + } +} + +static bool udma_chan_needs_reconfiguration(struct udma_chan *uc) +{ + /* Only PDMAs have staticTR */ + if (uc->config.ep_type == PSIL_EP_NATIVE) + return false; + + /* Check if the staticTR configuration has changed for TX */ + if (memcmp(&uc->static_tr, &uc->desc->static_tr, sizeof(uc->static_tr))) + return true; + + return false; +} + +static int udma_start(struct udma_chan *uc) +{ + struct virt_dma_desc *vd = vchan_next_desc(&uc->vc); + + if (!vd) { + uc->desc = NULL; + return -ENOENT; + } + + list_del(&vd->node); + + uc->desc = to_udma_desc(&vd->tx); + + /* Channel is already running and does not need reconfiguration */ + if (udma_is_chan_running(uc) && !udma_chan_needs_reconfiguration(uc)) { + udma_start_desc(uc); + goto out; + } + + /* Make sure that we clear the teardown bit, if it is set */ + udma_reset_chan(uc, false); + + /* Push descriptors before we start the channel */ + udma_start_desc(uc); + + switch (uc->desc->dir) { + case DMA_DEV_TO_MEM: + /* Config remote TR */ + if (uc->config.ep_type == PSIL_EP_PDMA_XY) { + u32 val = PDMA_STATIC_TR_Y(uc->desc->static_tr.elcnt) | + PDMA_STATIC_TR_X(uc->desc->static_tr.elsize); + const struct udma_match_data *match_data = + uc->ud->match_data; + + if (uc->config.enable_acc32) + val |= PDMA_STATIC_TR_XY_ACC32; + if (uc->config.enable_burst) + val |= PDMA_STATIC_TR_XY_BURST; + + udma_rchanrt_write(uc->rchan, + UDMA_RCHAN_RT_PEER_STATIC_TR_XY_REG, val); + + udma_rchanrt_write(uc->rchan, + UDMA_RCHAN_RT_PEER_STATIC_TR_Z_REG, + PDMA_STATIC_TR_Z(uc->desc->static_tr.bstcnt, + match_data->statictr_z_mask)); + + /* save the current staticTR configuration */ + memcpy(&uc->static_tr, &uc->desc->static_tr, + sizeof(uc->static_tr)); + } + + udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_CTL_REG, + UDMA_CHAN_RT_CTL_EN); + + /* Enable remote */ + udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_PEER_RT_EN_REG, + UDMA_PEER_RT_EN_ENABLE); + + break; + case DMA_MEM_TO_DEV: + /* Config remote TR */ + if (uc->config.ep_type == PSIL_EP_PDMA_XY) { + u32 val = PDMA_STATIC_TR_Y(uc->desc->static_tr.elcnt) | + PDMA_STATIC_TR_X(uc->desc->static_tr.elsize); + + if (uc->config.enable_acc32) + val |= PDMA_STATIC_TR_XY_ACC32; + if (uc->config.enable_burst) + val |= PDMA_STATIC_TR_XY_BURST; + + udma_tchanrt_write(uc->tchan, + UDMA_TCHAN_RT_PEER_STATIC_TR_XY_REG, val); + + /* save the current staticTR configuration */ + memcpy(&uc->static_tr, &uc->desc->static_tr, + sizeof(uc->static_tr)); + } + + /* Enable remote */ + udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_PEER_RT_EN_REG, + UDMA_PEER_RT_EN_ENABLE); + + udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_CTL_REG, + UDMA_CHAN_RT_CTL_EN); + + break; + case DMA_MEM_TO_MEM: + udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_CTL_REG, + UDMA_CHAN_RT_CTL_EN); + udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_CTL_REG, + UDMA_CHAN_RT_CTL_EN); + + break; + default: + return -EINVAL; + } + + uc->state = UDMA_CHAN_IS_ACTIVE; +out: + + return 0; +} + +static int udma_stop(struct udma_chan *uc) +{ + enum udma_chan_state old_state = uc->state; + + uc->state = UDMA_CHAN_IS_TERMINATING; + reinit_completion(&uc->teardown_completed); + + switch (uc->config.dir) { + case DMA_DEV_TO_MEM: + udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_PEER_RT_EN_REG, + UDMA_PEER_RT_EN_ENABLE | + UDMA_PEER_RT_EN_TEARDOWN); + break; + case DMA_MEM_TO_DEV: + udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_PEER_RT_EN_REG, + UDMA_PEER_RT_EN_ENABLE | + UDMA_PEER_RT_EN_FLUSH); + udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_CTL_REG, + UDMA_CHAN_RT_CTL_EN | + UDMA_CHAN_RT_CTL_TDOWN); + break; + case DMA_MEM_TO_MEM: + udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_CTL_REG, + UDMA_CHAN_RT_CTL_EN | + UDMA_CHAN_RT_CTL_TDOWN); + break; + default: + uc->state = old_state; + complete_all(&uc->teardown_completed); + return -EINVAL; + } + + return 0; +} + +static void udma_cyclic_packet_elapsed(struct udma_chan *uc) +{ + struct udma_desc *d = uc->desc; + struct cppi5_host_desc_t *h_desc; + + h_desc = d->hwdesc[d->desc_idx].cppi5_desc_vaddr; + cppi5_hdesc_reset_to_original(h_desc); + udma_push_to_ring(uc, d->desc_idx); + d->desc_idx = (d->desc_idx + 1) % d->sglen; +} + +static inline void udma_fetch_epib(struct udma_chan *uc, struct udma_desc *d) +{ + struct cppi5_host_desc_t *h_desc = d->hwdesc[0].cppi5_desc_vaddr; + + memcpy(d->metadata, h_desc->epib, d->metadata_size); +} + +static bool udma_is_desc_really_done(struct udma_chan *uc, struct udma_desc *d) +{ + u32 peer_bcnt, bcnt; + + /* Only TX towards PDMA is affected */ + if (uc->config.ep_type == PSIL_EP_NATIVE || + uc->config.dir != DMA_MEM_TO_DEV) + return true; + + peer_bcnt = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_PEER_BCNT_REG); + bcnt = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_BCNT_REG); + + if (peer_bcnt < bcnt) { + uc->tx_drain.residue = bcnt - peer_bcnt; + uc->tx_drain.jiffie = jiffies; + return false; + } + + return true; +} + +static void udma_check_tx_completion(struct work_struct *work) +{ + struct udma_chan *uc = container_of(work, typeof(*uc), + tx_drain.work.work); + bool desc_done = true; + u32 residue_diff; + unsigned long jiffie_diff, delay; + + if (uc->desc) { + residue_diff = uc->tx_drain.residue; + jiffie_diff = uc->tx_drain.jiffie; + desc_done = udma_is_desc_really_done(uc, uc->desc); + } + + if (!desc_done) { + jiffie_diff = uc->tx_drain.jiffie - jiffie_diff; + residue_diff -= uc->tx_drain.residue; + if (residue_diff) { + /* Try to guess when we should check next time */ + residue_diff /= jiffie_diff; + delay = uc->tx_drain.residue / residue_diff / 3; + if (jiffies_to_msecs(delay) < 5) + delay = 0; + } else { + /* No progress, check again in 1 second */ + delay = HZ; + } + + schedule_delayed_work(&uc->tx_drain.work, delay); + } else if (uc->desc) { + struct udma_desc *d = uc->desc; + + uc->bcnt += d->residue; + udma_start(uc); + vchan_cookie_complete(&d->vd); + } +} + +static irqreturn_t udma_ring_irq_handler(int irq, void *data) +{ + struct udma_chan *uc = data; + struct udma_desc *d; + unsigned long flags; + dma_addr_t paddr = 0; + + if (udma_pop_from_ring(uc, &paddr) || !paddr) + return IRQ_HANDLED; + + spin_lock_irqsave(&uc->vc.lock, flags); + + /* Teardown completion message */ + if (cppi5_desc_is_tdcm(paddr)) { + /* Compensate our internal pop/push counter */ + uc->in_ring_cnt++; + + complete_all(&uc->teardown_completed); + + if (uc->terminated_desc) { + udma_desc_free(&uc->terminated_desc->vd); + uc->terminated_desc = NULL; + } + + if (!uc->desc) + udma_start(uc); + + goto out; + } + + d = udma_udma_desc_from_paddr(uc, paddr); + + if (d) { + dma_addr_t desc_paddr = udma_curr_cppi5_desc_paddr(d, + d->desc_idx); + if (desc_paddr != paddr) { + dev_err(uc->ud->dev, "not matching descriptors!\n"); + goto out; + } + + if (uc->cyclic) { + /* push the descriptor back to the ring */ + if (d == uc->desc) { + udma_cyclic_packet_elapsed(uc); + vchan_cyclic_callback(&d->vd); + } + } else { + bool desc_done = false; + + if (d == uc->desc) { + desc_done = udma_is_desc_really_done(uc, d); + + if (desc_done) { + uc->bcnt += d->residue; + udma_start(uc); + } else { + schedule_delayed_work(&uc->tx_drain.work, + 0); + } + } + + if (desc_done) + vchan_cookie_complete(&d->vd); + } + } +out: + spin_unlock_irqrestore(&uc->vc.lock, flags); + + return IRQ_HANDLED; +} + +static irqreturn_t udma_udma_irq_handler(int irq, void *data) +{ + struct udma_chan *uc = data; + struct udma_desc *d; + unsigned long flags; + + spin_lock_irqsave(&uc->vc.lock, flags); + d = uc->desc; + if (d) { + d->tr_idx = (d->tr_idx + 1) % d->sglen; + + if (uc->cyclic) { + vchan_cyclic_callback(&d->vd); + } else { + /* TODO: figure out the real amount of data */ + uc->bcnt += d->residue; + udma_start(uc); + vchan_cookie_complete(&d->vd); + } + } + + spin_unlock_irqrestore(&uc->vc.lock, flags); + + return IRQ_HANDLED; +} + +static struct udma_rflow *__udma_get_rflow(struct udma_dev *ud, int id) +{ + /* + * Attempt to request rflow by ID can be made for any rflow + * if not in use with assumption that caller knows what's doing. + * TI-SCI FW will perform additional permission check ant way, it's + * safe + */ + + if (id < 0 || id >= ud->rflow_cnt) + return ERR_PTR(-ENOENT); + + if (test_bit(id, ud->rflow_in_use)) + return ERR_PTR(-ENOENT); + + /* GP rflow has to be allocated first */ + if (!test_bit(id, ud->rflow_gp_map) && + !test_bit(id, ud->rflow_gp_map_allocated)) + return ERR_PTR(-EINVAL); + + dev_dbg(ud->dev, "get rflow%d\n", id); + set_bit(id, ud->rflow_in_use); + return &ud->rflows[id]; +} + +static void __udma_put_rflow(struct udma_dev *ud, struct udma_rflow *rflow) +{ + if (!test_bit(rflow->id, ud->rflow_in_use)) { + dev_err(ud->dev, "attempt to put unused rflow%d\n", rflow->id); + return; + } + + dev_dbg(ud->dev, "put rflow%d\n", rflow->id); + clear_bit(rflow->id, ud->rflow_in_use); +} + +#define UDMA_RESERVE_RESOURCE(res) \ +static struct udma_##res *__udma_reserve_##res(struct udma_dev *ud, \ + enum udma_tp_level tpl, \ + int id) \ +{ \ + if (id >= 0) { \ + if (test_bit(id, ud->res##_map)) { \ + dev_err(ud->dev, "res##%d is in use\n", id); \ + return ERR_PTR(-ENOENT); \ + } \ + } else { \ + int start; \ + \ + if (tpl >= ud->match_data->tpl_levels) \ + tpl = ud->match_data->tpl_levels - 1; \ + \ + start = ud->match_data->level_start_idx[tpl]; \ + \ + id = find_next_zero_bit(ud->res##_map, ud->res##_cnt, \ + start); \ + if (id == ud->res##_cnt) { \ + return ERR_PTR(-ENOENT); \ + } \ + } \ + \ + set_bit(id, ud->res##_map); \ + return &ud->res##s[id]; \ +} + +UDMA_RESERVE_RESOURCE(tchan); +UDMA_RESERVE_RESOURCE(rchan); + +static int udma_get_tchan(struct udma_chan *uc) +{ + struct udma_dev *ud = uc->ud; + + if (uc->tchan) { + dev_dbg(ud->dev, "chan%d: already have tchan%d allocated\n", + uc->id, uc->tchan->id); + return 0; + } + + uc->tchan = __udma_reserve_tchan(ud, uc->config.channel_tpl, -1); + if (IS_ERR(uc->tchan)) + return PTR_ERR(uc->tchan); + + return 0; +} + +static int udma_get_rchan(struct udma_chan *uc) +{ + struct udma_dev *ud = uc->ud; + + if (uc->rchan) { + dev_dbg(ud->dev, "chan%d: already have rchan%d allocated\n", + uc->id, uc->rchan->id); + return 0; + } + + uc->rchan = __udma_reserve_rchan(ud, uc->config.channel_tpl, -1); + if (IS_ERR(uc->rchan)) + return PTR_ERR(uc->rchan); + + return 0; +} + +static int udma_get_chan_pair(struct udma_chan *uc) +{ + struct udma_dev *ud = uc->ud; + const struct udma_match_data *match_data = ud->match_data; + int chan_id, end; + + if ((uc->tchan && uc->rchan) && uc->tchan->id == uc->rchan->id) { + dev_info(ud->dev, "chan%d: already have %d pair allocated\n", + uc->id, uc->tchan->id); + return 0; + } + + if (uc->tchan) { + dev_err(ud->dev, "chan%d: already have tchan%d allocated\n", + uc->id, uc->tchan->id); + return -EBUSY; + } else if (uc->rchan) { + dev_err(ud->dev, "chan%d: already have rchan%d allocated\n", + uc->id, uc->rchan->id); + return -EBUSY; + } + + /* Can be optimized, but let's have it like this for now */ + end = min(ud->tchan_cnt, ud->rchan_cnt); + /* Try to use the highest TPL channel pair for MEM_TO_MEM channels */ + chan_id = match_data->level_start_idx[match_data->tpl_levels - 1]; + for (; chan_id < end; chan_id++) { + if (!test_bit(chan_id, ud->tchan_map) && + !test_bit(chan_id, ud->rchan_map)) + break; + } + + if (chan_id == end) + return -ENOENT; + + set_bit(chan_id, ud->tchan_map); + set_bit(chan_id, ud->rchan_map); + uc->tchan = &ud->tchans[chan_id]; + uc->rchan = &ud->rchans[chan_id]; + + return 0; +} + +static int udma_get_rflow(struct udma_chan *uc, int flow_id) +{ + struct udma_dev *ud = uc->ud; + + if (!uc->rchan) { + dev_err(ud->dev, "chan%d: does not have rchan??\n", uc->id); + return -EINVAL; + } + + if (uc->rflow) { + dev_dbg(ud->dev, "chan%d: already have rflow%d allocated\n", + uc->id, uc->rflow->id); + return 0; + } + + uc->rflow = __udma_get_rflow(ud, flow_id); + if (IS_ERR(uc->rflow)) + return PTR_ERR(uc->rflow); + + return 0; +} + +static void udma_put_rchan(struct udma_chan *uc) +{ + struct udma_dev *ud = uc->ud; + + if (uc->rchan) { + dev_dbg(ud->dev, "chan%d: put rchan%d\n", uc->id, + uc->rchan->id); + clear_bit(uc->rchan->id, ud->rchan_map); + uc->rchan = NULL; + } +} + +static void udma_put_tchan(struct udma_chan *uc) +{ + struct udma_dev *ud = uc->ud; + + if (uc->tchan) { + dev_dbg(ud->dev, "chan%d: put tchan%d\n", uc->id, + uc->tchan->id); + clear_bit(uc->tchan->id, ud->tchan_map); + uc->tchan = NULL; + } +} + +static void udma_put_rflow(struct udma_chan *uc) +{ + struct udma_dev *ud = uc->ud; + + if (uc->rflow) { + dev_dbg(ud->dev, "chan%d: put rflow%d\n", uc->id, + uc->rflow->id); + __udma_put_rflow(ud, uc->rflow); + uc->rflow = NULL; + } +} + +static void udma_free_tx_resources(struct udma_chan *uc) +{ + if (!uc->tchan) + return; + + k3_ringacc_ring_free(uc->tchan->t_ring); + k3_ringacc_ring_free(uc->tchan->tc_ring); + uc->tchan->t_ring = NULL; + uc->tchan->tc_ring = NULL; + + udma_put_tchan(uc); +} + +static int udma_alloc_tx_resources(struct udma_chan *uc) +{ + struct k3_ring_cfg ring_cfg; + struct udma_dev *ud = uc->ud; + int ret; + + ret = udma_get_tchan(uc); + if (ret) + return ret; + + uc->tchan->t_ring = k3_ringacc_request_ring(ud->ringacc, + uc->tchan->id, 0); + if (!uc->tchan->t_ring) { + ret = -EBUSY; + goto err_tx_ring; + } + + uc->tchan->tc_ring = k3_ringacc_request_ring(ud->ringacc, -1, 0); + if (!uc->tchan->tc_ring) { + ret = -EBUSY; + goto err_txc_ring; + } + + memset(&ring_cfg, 0, sizeof(ring_cfg)); + ring_cfg.size = K3_UDMA_DEFAULT_RING_SIZE; + ring_cfg.elm_size = K3_RINGACC_RING_ELSIZE_8; + ring_cfg.mode = K3_RINGACC_RING_MODE_MESSAGE; + + ret = k3_ringacc_ring_cfg(uc->tchan->t_ring, &ring_cfg); + ret |= k3_ringacc_ring_cfg(uc->tchan->tc_ring, &ring_cfg); + + if (ret) + goto err_ringcfg; + + return 0; + +err_ringcfg: + k3_ringacc_ring_free(uc->tchan->tc_ring); + uc->tchan->tc_ring = NULL; +err_txc_ring: + k3_ringacc_ring_free(uc->tchan->t_ring); + uc->tchan->t_ring = NULL; +err_tx_ring: + udma_put_tchan(uc); + + return ret; +} + +static void udma_free_rx_resources(struct udma_chan *uc) +{ + if (!uc->rchan) + return; + + if (uc->rflow) { + struct udma_rflow *rflow = uc->rflow; + + k3_ringacc_ring_free(rflow->fd_ring); + k3_ringacc_ring_free(rflow->r_ring); + rflow->fd_ring = NULL; + rflow->r_ring = NULL; + + udma_put_rflow(uc); + } + + udma_put_rchan(uc); +} + +static int udma_alloc_rx_resources(struct udma_chan *uc) +{ + struct udma_dev *ud = uc->ud; + struct k3_ring_cfg ring_cfg; + struct udma_rflow *rflow; + int fd_ring_id; + int ret; + + ret = udma_get_rchan(uc); + if (ret) + return ret; + + /* For MEM_TO_MEM we don't need rflow or rings */ + if (uc->config.dir == DMA_MEM_TO_MEM) + return 0; + + ret = udma_get_rflow(uc, uc->rchan->id); + if (ret) { + ret = -EBUSY; + goto err_rflow; + } + + rflow = uc->rflow; + fd_ring_id = ud->tchan_cnt + ud->echan_cnt + uc->rchan->id; + rflow->fd_ring = k3_ringacc_request_ring(ud->ringacc, fd_ring_id, 0); + if (!rflow->fd_ring) { + ret = -EBUSY; + goto err_rx_ring; + } + + rflow->r_ring = k3_ringacc_request_ring(ud->ringacc, -1, 0); + if (!rflow->r_ring) { + ret = -EBUSY; + goto err_rxc_ring; + } + + memset(&ring_cfg, 0, sizeof(ring_cfg)); + + if (uc->config.pkt_mode) + ring_cfg.size = SG_MAX_SEGMENTS; + else + ring_cfg.size = K3_UDMA_DEFAULT_RING_SIZE; + + ring_cfg.elm_size = K3_RINGACC_RING_ELSIZE_8; + ring_cfg.mode = K3_RINGACC_RING_MODE_MESSAGE; + + ret = k3_ringacc_ring_cfg(rflow->fd_ring, &ring_cfg); + ring_cfg.size = K3_UDMA_DEFAULT_RING_SIZE; + ret |= k3_ringacc_ring_cfg(rflow->r_ring, &ring_cfg); + + if (ret) + goto err_ringcfg; + + return 0; + +err_ringcfg: + k3_ringacc_ring_free(rflow->r_ring); + rflow->r_ring = NULL; +err_rxc_ring: + k3_ringacc_ring_free(rflow->fd_ring); + rflow->fd_ring = NULL; +err_rx_ring: + udma_put_rflow(uc); +err_rflow: + udma_put_rchan(uc); + + return ret; +} + +#define TISCI_TCHAN_VALID_PARAMS ( \ + TI_SCI_MSG_VALUE_RM_UDMAP_CH_PAUSE_ON_ERR_VALID | \ + TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_FILT_EINFO_VALID | \ + TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_FILT_PSWORDS_VALID | \ + TI_SCI_MSG_VALUE_RM_UDMAP_CH_CHAN_TYPE_VALID | \ + TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_SUPR_TDPKT_VALID | \ + TI_SCI_MSG_VALUE_RM_UDMAP_CH_FETCH_SIZE_VALID | \ + TI_SCI_MSG_VALUE_RM_UDMAP_CH_CQ_QNUM_VALID) + +#define TISCI_RCHAN_VALID_PARAMS ( \ + TI_SCI_MSG_VALUE_RM_UDMAP_CH_PAUSE_ON_ERR_VALID | \ + TI_SCI_MSG_VALUE_RM_UDMAP_CH_FETCH_SIZE_VALID | \ + TI_SCI_MSG_VALUE_RM_UDMAP_CH_CQ_QNUM_VALID | \ + TI_SCI_MSG_VALUE_RM_UDMAP_CH_CHAN_TYPE_VALID | \ + TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_IGNORE_SHORT_VALID | \ + TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_IGNORE_LONG_VALID | \ + TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_FLOWID_START_VALID | \ + TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_FLOWID_CNT_VALID) + +static int udma_tisci_m2m_channel_config(struct udma_chan *uc) +{ + struct udma_dev *ud = uc->ud; + struct udma_tisci_rm *tisci_rm = &ud->tisci_rm; + const struct ti_sci_rm_udmap_ops *tisci_ops = tisci_rm->tisci_udmap_ops; + struct udma_tchan *tchan = uc->tchan; + struct udma_rchan *rchan = uc->rchan; + int ret = 0; + + /* Non synchronized - mem to mem type of transfer */ + int tc_ring = k3_ringacc_get_ring_id(tchan->tc_ring); + struct ti_sci_msg_rm_udmap_tx_ch_cfg req_tx = { 0 }; + struct ti_sci_msg_rm_udmap_rx_ch_cfg req_rx = { 0 }; + + req_tx.valid_params = TISCI_TCHAN_VALID_PARAMS; + req_tx.nav_id = tisci_rm->tisci_dev_id; + req_tx.index = tchan->id; + req_tx.tx_chan_type = TI_SCI_RM_UDMAP_CHAN_TYPE_3RDP_BCOPY_PBRR; + req_tx.tx_fetch_size = sizeof(struct cppi5_desc_hdr_t) >> 2; + req_tx.txcq_qnum = tc_ring; + + ret = tisci_ops->tx_ch_cfg(tisci_rm->tisci, &req_tx); + if (ret) { + dev_err(ud->dev, "tchan%d cfg failed %d\n", tchan->id, ret); + return ret; + } + + req_rx.valid_params = TISCI_RCHAN_VALID_PARAMS; + req_rx.nav_id = tisci_rm->tisci_dev_id; + req_rx.index = rchan->id; + req_rx.rx_fetch_size = sizeof(struct cppi5_desc_hdr_t) >> 2; + req_rx.rxcq_qnum = tc_ring; + req_rx.rx_chan_type = TI_SCI_RM_UDMAP_CHAN_TYPE_3RDP_BCOPY_PBRR; + + ret = tisci_ops->rx_ch_cfg(tisci_rm->tisci, &req_rx); + if (ret) + dev_err(ud->dev, "rchan%d alloc failed %d\n", rchan->id, ret); + + return ret; +} + +static int udma_tisci_tx_channel_config(struct udma_chan *uc) +{ + struct udma_dev *ud = uc->ud; + struct udma_tisci_rm *tisci_rm = &ud->tisci_rm; + const struct ti_sci_rm_udmap_ops *tisci_ops = tisci_rm->tisci_udmap_ops; + struct udma_tchan *tchan = uc->tchan; + int tc_ring = k3_ringacc_get_ring_id(tchan->tc_ring); + struct ti_sci_msg_rm_udmap_tx_ch_cfg req_tx = { 0 }; + u32 mode, fetch_size; + int ret = 0; + + if (uc->config.pkt_mode) { + mode = TI_SCI_RM_UDMAP_CHAN_TYPE_PKT_PBRR; + fetch_size = cppi5_hdesc_calc_size(uc->config.needs_epib, + uc->config.psd_size, 0); + } else { + mode = TI_SCI_RM_UDMAP_CHAN_TYPE_3RDP_PBRR; + fetch_size = sizeof(struct cppi5_desc_hdr_t); + } + + req_tx.valid_params = TISCI_TCHAN_VALID_PARAMS; + req_tx.nav_id = tisci_rm->tisci_dev_id; + req_tx.index = tchan->id; + req_tx.tx_chan_type = mode; + req_tx.tx_supr_tdpkt = uc->config.notdpkt; + req_tx.tx_fetch_size = fetch_size >> 2; + req_tx.txcq_qnum = tc_ring; + + ret = tisci_ops->tx_ch_cfg(tisci_rm->tisci, &req_tx); + if (ret) + dev_err(ud->dev, "tchan%d cfg failed %d\n", tchan->id, ret); + + return ret; +} + +static int udma_tisci_rx_channel_config(struct udma_chan *uc) +{ + struct udma_dev *ud = uc->ud; + struct udma_tisci_rm *tisci_rm = &ud->tisci_rm; + const struct ti_sci_rm_udmap_ops *tisci_ops = tisci_rm->tisci_udmap_ops; + struct udma_rchan *rchan = uc->rchan; + int fd_ring = k3_ringacc_get_ring_id(uc->rflow->fd_ring); + int rx_ring = k3_ringacc_get_ring_id(uc->rflow->r_ring); + struct ti_sci_msg_rm_udmap_rx_ch_cfg req_rx = { 0 }; + struct ti_sci_msg_rm_udmap_flow_cfg flow_req = { 0 }; + u32 mode, fetch_size; + int ret = 0; + + if (uc->config.pkt_mode) { + mode = TI_SCI_RM_UDMAP_CHAN_TYPE_PKT_PBRR; + fetch_size = cppi5_hdesc_calc_size(uc->config.needs_epib, + uc->config.psd_size, 0); + } else { + mode = TI_SCI_RM_UDMAP_CHAN_TYPE_3RDP_PBRR; + fetch_size = sizeof(struct cppi5_desc_hdr_t); + } + + req_rx.valid_params = TISCI_RCHAN_VALID_PARAMS; + req_rx.nav_id = tisci_rm->tisci_dev_id; + req_rx.index = rchan->id; + req_rx.rx_fetch_size = fetch_size >> 2; + req_rx.rxcq_qnum = rx_ring; + req_rx.rx_chan_type = mode; + + ret = tisci_ops->rx_ch_cfg(tisci_rm->tisci, &req_rx); + if (ret) { + dev_err(ud->dev, "rchan%d cfg failed %d\n", rchan->id, ret); + return ret; + } + + flow_req.valid_params = + TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_EINFO_PRESENT_VALID | + TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_PSINFO_PRESENT_VALID | + TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_ERROR_HANDLING_VALID | + TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_DESC_TYPE_VALID | + TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_DEST_QNUM_VALID | + TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_SRC_TAG_HI_SEL_VALID | + TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_SRC_TAG_LO_SEL_VALID | + TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_DEST_TAG_HI_SEL_VALID | + TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_DEST_TAG_LO_SEL_VALID | + TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_FDQ0_SZ0_QNUM_VALID | + TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_FDQ1_QNUM_VALID | + TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_FDQ2_QNUM_VALID | + TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_FDQ3_QNUM_VALID; + + flow_req.nav_id = tisci_rm->tisci_dev_id; + flow_req.flow_index = rchan->id; + + if (uc->config.needs_epib) + flow_req.rx_einfo_present = 1; + else + flow_req.rx_einfo_present = 0; + if (uc->config.psd_size) + flow_req.rx_psinfo_present = 1; + else + flow_req.rx_psinfo_present = 0; + flow_req.rx_error_handling = 1; + flow_req.rx_dest_qnum = rx_ring; + flow_req.rx_src_tag_hi_sel = UDMA_RFLOW_SRCTAG_NONE; + flow_req.rx_src_tag_lo_sel = UDMA_RFLOW_SRCTAG_SRC_TAG; + flow_req.rx_dest_tag_hi_sel = UDMA_RFLOW_DSTTAG_DST_TAG_HI; + flow_req.rx_dest_tag_lo_sel = UDMA_RFLOW_DSTTAG_DST_TAG_LO; + flow_req.rx_fdq0_sz0_qnum = fd_ring; + flow_req.rx_fdq1_qnum = fd_ring; + flow_req.rx_fdq2_qnum = fd_ring; + flow_req.rx_fdq3_qnum = fd_ring; + + ret = tisci_ops->rx_flow_cfg(tisci_rm->tisci, &flow_req); + + if (ret) + dev_err(ud->dev, "flow%d config failed: %d\n", rchan->id, ret); + + return 0; +} + +static int udma_alloc_chan_resources(struct dma_chan *chan) +{ + struct udma_chan *uc = to_udma_chan(chan); + struct udma_dev *ud = to_udma_dev(chan->device); + const struct udma_match_data *match_data = ud->match_data; + struct k3_ring *irq_ring; + u32 irq_udma_idx; + int ret; + + if (uc->config.pkt_mode || uc->config.dir == DMA_MEM_TO_MEM) { + uc->use_dma_pool = true; + /* in case of MEM_TO_MEM we have maximum of two TRs */ + if (uc->config.dir == DMA_MEM_TO_MEM) { + uc->config.hdesc_size = cppi5_trdesc_calc_size( + sizeof(struct cppi5_tr_type15_t), 2); + uc->config.pkt_mode = false; + } + } + + if (uc->use_dma_pool) { + uc->hdesc_pool = dma_pool_create(uc->name, ud->ddev.dev, + uc->config.hdesc_size, + ud->desc_align, + 0); + if (!uc->hdesc_pool) { + dev_err(ud->ddev.dev, + "Descriptor pool allocation failed\n"); + uc->use_dma_pool = false; + return -ENOMEM; + } + } + + /* + * Make sure that the completion is in a known state: + * No teardown, the channel is idle + */ + reinit_completion(&uc->teardown_completed); + complete_all(&uc->teardown_completed); + uc->state = UDMA_CHAN_IS_IDLE; + + switch (uc->config.dir) { + case DMA_MEM_TO_MEM: + /* Non synchronized - mem to mem type of transfer */ + dev_dbg(uc->ud->dev, "%s: chan%d as MEM-to-MEM\n", __func__, + uc->id); + + ret = udma_get_chan_pair(uc); + if (ret) + return ret; + + ret = udma_alloc_tx_resources(uc); + if (ret) + return ret; + + ret = udma_alloc_rx_resources(uc); + if (ret) { + udma_free_tx_resources(uc); + return ret; + } + + uc->config.src_thread = ud->psil_base + uc->tchan->id; + uc->config.dst_thread = (ud->psil_base + uc->rchan->id) | + K3_PSIL_DST_THREAD_ID_OFFSET; + + irq_ring = uc->tchan->tc_ring; + irq_udma_idx = uc->tchan->id; + + ret = udma_tisci_m2m_channel_config(uc); + break; + case DMA_MEM_TO_DEV: + /* Slave transfer synchronized - mem to dev (TX) trasnfer */ + dev_dbg(uc->ud->dev, "%s: chan%d as MEM-to-DEV\n", __func__, + uc->id); + + ret = udma_alloc_tx_resources(uc); + if (ret) { + uc->config.remote_thread_id = -1; + return ret; + } + + uc->config.src_thread = ud->psil_base + uc->tchan->id; + uc->config.dst_thread = uc->config.remote_thread_id; + uc->config.dst_thread |= K3_PSIL_DST_THREAD_ID_OFFSET; + + irq_ring = uc->tchan->tc_ring; + irq_udma_idx = uc->tchan->id; + + ret = udma_tisci_tx_channel_config(uc); + break; + case DMA_DEV_TO_MEM: + /* Slave transfer synchronized - dev to mem (RX) trasnfer */ + dev_dbg(uc->ud->dev, "%s: chan%d as DEV-to-MEM\n", __func__, + uc->id); + + ret = udma_alloc_rx_resources(uc); + if (ret) { + uc->config.remote_thread_id = -1; + return ret; + } + + uc->config.src_thread = uc->config.remote_thread_id; + uc->config.dst_thread = (ud->psil_base + uc->rchan->id) | + K3_PSIL_DST_THREAD_ID_OFFSET; + + irq_ring = uc->rflow->r_ring; + irq_udma_idx = match_data->rchan_oes_offset + uc->rchan->id; + + ret = udma_tisci_rx_channel_config(uc); + break; + default: + /* Can not happen */ + dev_err(uc->ud->dev, "%s: chan%d invalid direction (%u)\n", + __func__, uc->id, uc->config.dir); + return -EINVAL; + } + + /* check if the channel configuration was successful */ + if (ret) + goto err_res_free; + + if (udma_is_chan_running(uc)) { + dev_warn(ud->dev, "chan%d: is running!\n", uc->id); + udma_stop(uc); + if (udma_is_chan_running(uc)) { + dev_err(ud->dev, "chan%d: won't stop!\n", uc->id); + goto err_res_free; + } + } + + /* PSI-L pairing */ + ret = navss_psil_pair(ud, uc->config.src_thread, uc->config.dst_thread); + if (ret) { + dev_err(ud->dev, "PSI-L pairing failed: 0x%04x -> 0x%04x\n", + uc->config.src_thread, uc->config.dst_thread); + goto err_res_free; + } + + uc->psil_paired = true; + + uc->irq_num_ring = k3_ringacc_get_ring_irq_num(irq_ring); + if (uc->irq_num_ring <= 0) { + dev_err(ud->dev, "Failed to get ring irq (index: %u)\n", + k3_ringacc_get_ring_id(irq_ring)); + ret = -EINVAL; + goto err_psi_free; + } + + ret = request_irq(uc->irq_num_ring, udma_ring_irq_handler, + IRQF_TRIGGER_HIGH, uc->name, uc); + if (ret) { + dev_err(ud->dev, "chan%d: ring irq request failed\n", uc->id); + goto err_irq_free; + } + + /* Event from UDMA (TR events) only needed for slave TR mode channels */ + if (is_slave_direction(uc->config.dir) && !uc->config.pkt_mode) { + uc->irq_num_udma = ti_sci_inta_msi_get_virq(ud->dev, + irq_udma_idx); + if (uc->irq_num_udma <= 0) { + dev_err(ud->dev, "Failed to get udma irq (index: %u)\n", + irq_udma_idx); + free_irq(uc->irq_num_ring, uc); + ret = -EINVAL; + goto err_irq_free; + } + + ret = request_irq(uc->irq_num_udma, udma_udma_irq_handler, 0, + uc->name, uc); + if (ret) { + dev_err(ud->dev, "chan%d: UDMA irq request failed\n", + uc->id); + free_irq(uc->irq_num_ring, uc); + goto err_irq_free; + } + } else { + uc->irq_num_udma = 0; + } + + udma_reset_rings(uc); + + INIT_DELAYED_WORK_ONSTACK(&uc->tx_drain.work, + udma_check_tx_completion); + return 0; + +err_irq_free: + uc->irq_num_ring = 0; + uc->irq_num_udma = 0; +err_psi_free: + navss_psil_unpair(ud, uc->config.src_thread, uc->config.dst_thread); + uc->psil_paired = false; +err_res_free: + udma_free_tx_resources(uc); + udma_free_rx_resources(uc); + + udma_reset_uchan(uc); + + if (uc->use_dma_pool) { + dma_pool_destroy(uc->hdesc_pool); + uc->use_dma_pool = false; + } + + return ret; +} + +static int udma_slave_config(struct dma_chan *chan, + struct dma_slave_config *cfg) +{ + struct udma_chan *uc = to_udma_chan(chan); + + memcpy(&uc->cfg, cfg, sizeof(uc->cfg)); + + return 0; +} + +static struct udma_desc *udma_alloc_tr_desc(struct udma_chan *uc, + size_t tr_size, int tr_count, + enum dma_transfer_direction dir) +{ + struct udma_hwdesc *hwdesc; + struct cppi5_desc_hdr_t *tr_desc; + struct udma_desc *d; + u32 reload_count = 0; + u32 ring_id; + + switch (tr_size) { + case 16: + case 32: + case 64: + case 128: + break; + default: + dev_err(uc->ud->dev, "Unsupported TR size of %zu\n", tr_size); + return NULL; + } + + /* We have only one descriptor containing multiple TRs */ + d = kzalloc(sizeof(*d) + sizeof(d->hwdesc[0]), GFP_NOWAIT); + if (!d) + return NULL; + + d->sglen = tr_count; + + d->hwdesc_count = 1; + hwdesc = &d->hwdesc[0]; + + /* Allocate memory for DMA ring descriptor */ + if (uc->use_dma_pool) { + hwdesc->cppi5_desc_size = uc->config.hdesc_size; + hwdesc->cppi5_desc_vaddr = dma_pool_zalloc(uc->hdesc_pool, + GFP_NOWAIT, + &hwdesc->cppi5_desc_paddr); + } else { + hwdesc->cppi5_desc_size = cppi5_trdesc_calc_size(tr_size, + tr_count); + hwdesc->cppi5_desc_size = ALIGN(hwdesc->cppi5_desc_size, + uc->ud->desc_align); + hwdesc->cppi5_desc_vaddr = dma_alloc_coherent(uc->ud->dev, + hwdesc->cppi5_desc_size, + &hwdesc->cppi5_desc_paddr, + GFP_NOWAIT); + } + + if (!hwdesc->cppi5_desc_vaddr) { + kfree(d); + return NULL; + } + + /* Start of the TR req records */ + hwdesc->tr_req_base = hwdesc->cppi5_desc_vaddr + tr_size; + /* Start address of the TR response array */ + hwdesc->tr_resp_base = hwdesc->tr_req_base + tr_size * tr_count; + + tr_desc = hwdesc->cppi5_desc_vaddr; + + if (uc->cyclic) + reload_count = CPPI5_INFO0_TRDESC_RLDCNT_INFINITE; + + if (dir == DMA_DEV_TO_MEM) + ring_id = k3_ringacc_get_ring_id(uc->rflow->r_ring); + else + ring_id = k3_ringacc_get_ring_id(uc->tchan->tc_ring); + + cppi5_trdesc_init(tr_desc, tr_count, tr_size, 0, reload_count); + cppi5_desc_set_pktids(tr_desc, uc->id, + CPPI5_INFO1_DESC_FLOWID_DEFAULT); + cppi5_desc_set_retpolicy(tr_desc, 0, ring_id); + + return d; +} + +static struct udma_desc * +udma_prep_slave_sg_tr(struct udma_chan *uc, struct scatterlist *sgl, + unsigned int sglen, enum dma_transfer_direction dir, + unsigned long tx_flags, void *context) +{ + enum dma_slave_buswidth dev_width; + struct scatterlist *sgent; + struct udma_desc *d; + size_t tr_size; + struct cppi5_tr_type1_t *tr_req = NULL; + unsigned int i; + u32 burst; + + if (dir == DMA_DEV_TO_MEM) { + dev_width = uc->cfg.src_addr_width; + burst = uc->cfg.src_maxburst; + } else if (dir == DMA_MEM_TO_DEV) { + dev_width = uc->cfg.dst_addr_width; + burst = uc->cfg.dst_maxburst; + } else { + dev_err(uc->ud->dev, "%s: bad direction?\n", __func__); + return NULL; + } + + if (!burst) + burst = 1; + + /* Now allocate and setup the descriptor. */ + tr_size = sizeof(struct cppi5_tr_type1_t); + d = udma_alloc_tr_desc(uc, tr_size, sglen, dir); + if (!d) + return NULL; + + d->sglen = sglen; + + tr_req = d->hwdesc[0].tr_req_base; + for_each_sg(sgl, sgent, sglen, i) { + d->residue += sg_dma_len(sgent); + + cppi5_tr_init(&tr_req[i].flags, CPPI5_TR_TYPE1, false, false, + CPPI5_TR_EVENT_SIZE_COMPLETION, 0); + cppi5_tr_csf_set(&tr_req[i].flags, CPPI5_TR_CSF_SUPR_EVT); + + tr_req[i].addr = sg_dma_address(sgent); + tr_req[i].icnt0 = burst * dev_width; + tr_req[i].dim1 = burst * dev_width; + tr_req[i].icnt1 = sg_dma_len(sgent) / tr_req[i].icnt0; + } + + cppi5_tr_csf_set(&tr_req[i - 1].flags, CPPI5_TR_CSF_EOP); + + return d; +} + +static int udma_configure_statictr(struct udma_chan *uc, struct udma_desc *d, + enum dma_slave_buswidth dev_width, + u16 elcnt) +{ + if (uc->config.ep_type != PSIL_EP_PDMA_XY) + return 0; + + /* Bus width translates to the element size (ES) */ + switch (dev_width) { + case DMA_SLAVE_BUSWIDTH_1_BYTE: + d->static_tr.elsize = 0; + break; + case DMA_SLAVE_BUSWIDTH_2_BYTES: + d->static_tr.elsize = 1; + break; + case DMA_SLAVE_BUSWIDTH_3_BYTES: + d->static_tr.elsize = 2; + break; + case DMA_SLAVE_BUSWIDTH_4_BYTES: + d->static_tr.elsize = 3; + break; + case DMA_SLAVE_BUSWIDTH_8_BYTES: + d->static_tr.elsize = 4; + break; + default: /* not reached */ + return -EINVAL; + } + + d->static_tr.elcnt = elcnt; + + /* + * PDMA must to close the packet when the channel is in packet mode. + * For TR mode when the channel is not cyclic we also need PDMA to close + * the packet otherwise the transfer will stall because PDMA holds on + * the data it has received from the peripheral. + */ + if (uc->config.pkt_mode || !uc->cyclic) { + unsigned int div = dev_width * elcnt; + + if (uc->cyclic) + d->static_tr.bstcnt = d->residue / d->sglen / div; + else + d->static_tr.bstcnt = d->residue / div; + + if (uc->config.dir == DMA_DEV_TO_MEM && + d->static_tr.bstcnt > uc->ud->match_data->statictr_z_mask) + return -EINVAL; + } else { + d->static_tr.bstcnt = 0; + } + + return 0; +} + +static struct udma_desc * +udma_prep_slave_sg_pkt(struct udma_chan *uc, struct scatterlist *sgl, + unsigned int sglen, enum dma_transfer_direction dir, + unsigned long tx_flags, void *context) +{ + struct scatterlist *sgent; + struct cppi5_host_desc_t *h_desc = NULL; + struct udma_desc *d; + u32 ring_id; + unsigned int i; + + d = kzalloc(sizeof(*d) + sglen * sizeof(d->hwdesc[0]), GFP_NOWAIT); + if (!d) + return NULL; + + d->sglen = sglen; + d->hwdesc_count = sglen; + + if (dir == DMA_DEV_TO_MEM) + ring_id = k3_ringacc_get_ring_id(uc->rflow->r_ring); + else + ring_id = k3_ringacc_get_ring_id(uc->tchan->tc_ring); + + for_each_sg(sgl, sgent, sglen, i) { + struct udma_hwdesc *hwdesc = &d->hwdesc[i]; + dma_addr_t sg_addr = sg_dma_address(sgent); + struct cppi5_host_desc_t *desc; + size_t sg_len = sg_dma_len(sgent); + + hwdesc->cppi5_desc_vaddr = dma_pool_zalloc(uc->hdesc_pool, + GFP_NOWAIT, + &hwdesc->cppi5_desc_paddr); + if (!hwdesc->cppi5_desc_vaddr) { + dev_err(uc->ud->dev, + "descriptor%d allocation failed\n", i); + + udma_free_hwdesc(uc, d); + kfree(d); + return NULL; + } + + d->residue += sg_len; + hwdesc->cppi5_desc_size = uc->config.hdesc_size; + desc = hwdesc->cppi5_desc_vaddr; + + if (i == 0) { + cppi5_hdesc_init(desc, 0, 0); + /* Flow and Packed ID */ + cppi5_desc_set_pktids(&desc->hdr, uc->id, + CPPI5_INFO1_DESC_FLOWID_DEFAULT); + cppi5_desc_set_retpolicy(&desc->hdr, 0, ring_id); + } else { + cppi5_hdesc_reset_hbdesc(desc); + cppi5_desc_set_retpolicy(&desc->hdr, 0, 0xffff); + } + + /* attach the sg buffer to the descriptor */ + cppi5_hdesc_attach_buf(desc, sg_addr, sg_len, sg_addr, sg_len); + + /* Attach link as host buffer descriptor */ + if (h_desc) + cppi5_hdesc_link_hbdesc(h_desc, + hwdesc->cppi5_desc_paddr); + + if (dir == DMA_MEM_TO_DEV) + h_desc = desc; + } + + if (d->residue >= SZ_4M) { + dev_err(uc->ud->dev, + "%s: Transfer size %u is over the supported 4M range\n", + __func__, d->residue); + udma_free_hwdesc(uc, d); + kfree(d); + return NULL; + } + + h_desc = d->hwdesc[0].cppi5_desc_vaddr; + cppi5_hdesc_set_pktlen(h_desc, d->residue); + + return d; +} + +static int udma_attach_metadata(struct dma_async_tx_descriptor *desc, + void *data, size_t len) +{ + struct udma_desc *d = to_udma_desc(desc); + struct udma_chan *uc = to_udma_chan(desc->chan); + struct cppi5_host_desc_t *h_desc; + u32 psd_size = len; + u32 flags = 0; + + if (!uc->config.pkt_mode || !uc->config.metadata_size) + return -ENOTSUPP; + + if (!data || len > uc->config.metadata_size) + return -EINVAL; + + if (uc->config.needs_epib && len < CPPI5_INFO0_HDESC_EPIB_SIZE) + return -EINVAL; + + h_desc = d->hwdesc[0].cppi5_desc_vaddr; + if (d->dir == DMA_MEM_TO_DEV) + memcpy(h_desc->epib, data, len); + + if (uc->config.needs_epib) + psd_size -= CPPI5_INFO0_HDESC_EPIB_SIZE; + + d->metadata = data; + d->metadata_size = len; + if (uc->config.needs_epib) + flags |= CPPI5_INFO0_HDESC_EPIB_PRESENT; + + cppi5_hdesc_update_flags(h_desc, flags); + cppi5_hdesc_update_psdata_size(h_desc, psd_size); + + return 0; +} + +static void *udma_get_metadata_ptr(struct dma_async_tx_descriptor *desc, + size_t *payload_len, size_t *max_len) +{ + struct udma_desc *d = to_udma_desc(desc); + struct udma_chan *uc = to_udma_chan(desc->chan); + struct cppi5_host_desc_t *h_desc; + + if (!uc->config.pkt_mode || !uc->config.metadata_size) + return ERR_PTR(-ENOTSUPP); + + h_desc = d->hwdesc[0].cppi5_desc_vaddr; + + *max_len = uc->config.metadata_size; + + *payload_len = cppi5_hdesc_epib_present(&h_desc->hdr) ? + CPPI5_INFO0_HDESC_EPIB_SIZE : 0; + *payload_len += cppi5_hdesc_get_psdata_size(h_desc); + + return h_desc->epib; +} + +static int udma_set_metadata_len(struct dma_async_tx_descriptor *desc, + size_t payload_len) +{ + struct udma_desc *d = to_udma_desc(desc); + struct udma_chan *uc = to_udma_chan(desc->chan); + struct cppi5_host_desc_t *h_desc; + u32 psd_size = payload_len; + u32 flags = 0; + + if (!uc->config.pkt_mode || !uc->config.metadata_size) + return -ENOTSUPP; + + if (payload_len > uc->config.metadata_size) + return -EINVAL; + + if (uc->config.needs_epib && payload_len < CPPI5_INFO0_HDESC_EPIB_SIZE) + return -EINVAL; + + h_desc = d->hwdesc[0].cppi5_desc_vaddr; + + if (uc->config.needs_epib) { + psd_size -= CPPI5_INFO0_HDESC_EPIB_SIZE; + flags |= CPPI5_INFO0_HDESC_EPIB_PRESENT; + } + + cppi5_hdesc_update_flags(h_desc, flags); + cppi5_hdesc_update_psdata_size(h_desc, psd_size); + + return 0; +} + +static struct dma_descriptor_metadata_ops metadata_ops = { + .attach = udma_attach_metadata, + .get_ptr = udma_get_metadata_ptr, + .set_len = udma_set_metadata_len, +}; + +static struct dma_async_tx_descriptor * +udma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, + unsigned int sglen, enum dma_transfer_direction dir, + unsigned long tx_flags, void *context) +{ + struct udma_chan *uc = to_udma_chan(chan); + enum dma_slave_buswidth dev_width; + struct udma_desc *d; + u32 burst; + + if (dir != uc->config.dir) { + dev_err(chan->device->dev, + "%s: chan%d is for %s, not supporting %s\n", + __func__, uc->id, + dmaengine_get_direction_text(uc->config.dir), + dmaengine_get_direction_text(dir)); + return NULL; + } + + if (dir == DMA_DEV_TO_MEM) { + dev_width = uc->cfg.src_addr_width; + burst = uc->cfg.src_maxburst; + } else if (dir == DMA_MEM_TO_DEV) { + dev_width = uc->cfg.dst_addr_width; + burst = uc->cfg.dst_maxburst; + } else { + dev_err(chan->device->dev, "%s: bad direction?\n", __func__); + return NULL; + } + + if (!burst) + burst = 1; + + if (uc->config.pkt_mode) + d = udma_prep_slave_sg_pkt(uc, sgl, sglen, dir, tx_flags, + context); + else + d = udma_prep_slave_sg_tr(uc, sgl, sglen, dir, tx_flags, + context); + + if (!d) + return NULL; + + d->dir = dir; + d->desc_idx = 0; + d->tr_idx = 0; + + /* static TR for remote PDMA */ + if (udma_configure_statictr(uc, d, dev_width, burst)) { + dev_err(uc->ud->dev, + "%s: StaticTR Z is limted to maximum 4095 (%u)\n", + __func__, d->static_tr.bstcnt); + + udma_free_hwdesc(uc, d); + kfree(d); + return NULL; + } + + if (uc->config.metadata_size) + d->vd.tx.metadata_ops = &metadata_ops; + + return vchan_tx_prep(&uc->vc, &d->vd, tx_flags); +} + +static struct udma_desc * +udma_prep_dma_cyclic_tr(struct udma_chan *uc, dma_addr_t buf_addr, + size_t buf_len, size_t period_len, + enum dma_transfer_direction dir, unsigned long flags) +{ + enum dma_slave_buswidth dev_width; + struct udma_desc *d; + size_t tr_size; + struct cppi5_tr_type1_t *tr_req; + unsigned int i; + unsigned int periods = buf_len / period_len; + u32 burst; + + if (dir == DMA_DEV_TO_MEM) { + dev_width = uc->cfg.src_addr_width; + burst = uc->cfg.src_maxburst; + } else if (dir == DMA_MEM_TO_DEV) { + dev_width = uc->cfg.dst_addr_width; + burst = uc->cfg.dst_maxburst; + } else { + dev_err(uc->ud->dev, "%s: bad direction?\n", __func__); + return NULL; + } + + if (!burst) + burst = 1; + + /* Now allocate and setup the descriptor. */ + tr_size = sizeof(struct cppi5_tr_type1_t); + d = udma_alloc_tr_desc(uc, tr_size, periods, dir); + if (!d) + return NULL; + + tr_req = d->hwdesc[0].tr_req_base; + for (i = 0; i < periods; i++) { + cppi5_tr_init(&tr_req[i].flags, CPPI5_TR_TYPE1, false, false, + CPPI5_TR_EVENT_SIZE_COMPLETION, 0); + + tr_req[i].addr = buf_addr + period_len * i; + tr_req[i].icnt0 = dev_width; + tr_req[i].icnt1 = period_len / dev_width; + tr_req[i].dim1 = dev_width; + + if (!(flags & DMA_PREP_INTERRUPT)) + cppi5_tr_csf_set(&tr_req[i].flags, + CPPI5_TR_CSF_SUPR_EVT); + } + + return d; +} + +static struct udma_desc * +udma_prep_dma_cyclic_pkt(struct udma_chan *uc, dma_addr_t buf_addr, + size_t buf_len, size_t period_len, + enum dma_transfer_direction dir, unsigned long flags) +{ + struct udma_desc *d; + u32 ring_id; + int i; + int periods = buf_len / period_len; + + if (periods > (K3_UDMA_DEFAULT_RING_SIZE - 1)) + return NULL; + + if (period_len >= SZ_4M) + return NULL; + + d = kzalloc(sizeof(*d) + periods * sizeof(d->hwdesc[0]), GFP_NOWAIT); + if (!d) + return NULL; + + d->hwdesc_count = periods; + + /* TODO: re-check this... */ + if (dir == DMA_DEV_TO_MEM) + ring_id = k3_ringacc_get_ring_id(uc->rflow->r_ring); + else + ring_id = k3_ringacc_get_ring_id(uc->tchan->tc_ring); + + for (i = 0; i < periods; i++) { + struct udma_hwdesc *hwdesc = &d->hwdesc[i]; + dma_addr_t period_addr = buf_addr + (period_len * i); + struct cppi5_host_desc_t *h_desc; + + hwdesc->cppi5_desc_vaddr = dma_pool_zalloc(uc->hdesc_pool, + GFP_NOWAIT, + &hwdesc->cppi5_desc_paddr); + if (!hwdesc->cppi5_desc_vaddr) { + dev_err(uc->ud->dev, + "descriptor%d allocation failed\n", i); + + udma_free_hwdesc(uc, d); + kfree(d); + return NULL; + } + + hwdesc->cppi5_desc_size = uc->config.hdesc_size; + h_desc = hwdesc->cppi5_desc_vaddr; + + cppi5_hdesc_init(h_desc, 0, 0); + cppi5_hdesc_set_pktlen(h_desc, period_len); + + /* Flow and Packed ID */ + cppi5_desc_set_pktids(&h_desc->hdr, uc->id, + CPPI5_INFO1_DESC_FLOWID_DEFAULT); + cppi5_desc_set_retpolicy(&h_desc->hdr, 0, ring_id); + + /* attach each period to a new descriptor */ + cppi5_hdesc_attach_buf(h_desc, + period_addr, period_len, + period_addr, period_len); + } + + return d; +} + +static struct dma_async_tx_descriptor * +udma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len, + size_t period_len, enum dma_transfer_direction dir, + unsigned long flags) +{ + struct udma_chan *uc = to_udma_chan(chan); + enum dma_slave_buswidth dev_width; + struct udma_desc *d; + u32 burst; + + if (dir != uc->config.dir) { + dev_err(chan->device->dev, + "%s: chan%d is for %s, not supporting %s\n", + __func__, uc->id, + dmaengine_get_direction_text(uc->config.dir), + dmaengine_get_direction_text(dir)); + return NULL; + } + + uc->cyclic = true; + + if (dir == DMA_DEV_TO_MEM) { + dev_width = uc->cfg.src_addr_width; + burst = uc->cfg.src_maxburst; + } else if (dir == DMA_MEM_TO_DEV) { + dev_width = uc->cfg.dst_addr_width; + burst = uc->cfg.dst_maxburst; + } else { + dev_err(uc->ud->dev, "%s: bad direction?\n", __func__); + return NULL; + } + + if (!burst) + burst = 1; + + if (uc->config.pkt_mode) + d = udma_prep_dma_cyclic_pkt(uc, buf_addr, buf_len, period_len, + dir, flags); + else + d = udma_prep_dma_cyclic_tr(uc, buf_addr, buf_len, period_len, + dir, flags); + + if (!d) + return NULL; + + d->sglen = buf_len / period_len; + + d->dir = dir; + d->residue = buf_len; + + /* static TR for remote PDMA */ + if (udma_configure_statictr(uc, d, dev_width, burst)) { + dev_err(uc->ud->dev, + "%s: StaticTR Z is limted to maximum 4095 (%u)\n", + __func__, d->static_tr.bstcnt); + + udma_free_hwdesc(uc, d); + kfree(d); + return NULL; + } + + if (uc->config.metadata_size) + d->vd.tx.metadata_ops = &metadata_ops; + + return vchan_tx_prep(&uc->vc, &d->vd, flags); +} + +static struct dma_async_tx_descriptor * +udma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, + size_t len, unsigned long tx_flags) +{ + struct udma_chan *uc = to_udma_chan(chan); + struct udma_desc *d; + struct cppi5_tr_type15_t *tr_req; + int num_tr; + size_t tr_size = sizeof(struct cppi5_tr_type15_t); + u16 tr0_cnt0, tr0_cnt1, tr1_cnt0; + + if (uc->config.dir != DMA_MEM_TO_MEM) { + dev_err(chan->device->dev, + "%s: chan%d is for %s, not supporting %s\n", + __func__, uc->id, + dmaengine_get_direction_text(uc->config.dir), + dmaengine_get_direction_text(DMA_MEM_TO_MEM)); + return NULL; + } + + if (len < SZ_64K) { + num_tr = 1; + tr0_cnt0 = len; + tr0_cnt1 = 1; + } else { + unsigned long align_to = __ffs(src | dest); + + if (align_to > 3) + align_to = 3; + /* + * Keep simple: tr0: SZ_64K-alignment blocks, + * tr1: the remaining + */ + num_tr = 2; + tr0_cnt0 = (SZ_64K - BIT(align_to)); + if (len / tr0_cnt0 >= SZ_64K) { + dev_err(uc->ud->dev, "size %zu is not supported\n", + len); + return NULL; + } + + tr0_cnt1 = len / tr0_cnt0; + tr1_cnt0 = len % tr0_cnt0; + } + + d = udma_alloc_tr_desc(uc, tr_size, num_tr, DMA_MEM_TO_MEM); + if (!d) + return NULL; + + d->dir = DMA_MEM_TO_MEM; + d->desc_idx = 0; + d->tr_idx = 0; + d->residue = len; + + tr_req = d->hwdesc[0].tr_req_base; + + cppi5_tr_init(&tr_req[0].flags, CPPI5_TR_TYPE15, false, true, + CPPI5_TR_EVENT_SIZE_COMPLETION, 0); + cppi5_tr_csf_set(&tr_req[0].flags, CPPI5_TR_CSF_SUPR_EVT); + + tr_req[0].addr = src; + tr_req[0].icnt0 = tr0_cnt0; + tr_req[0].icnt1 = tr0_cnt1; + tr_req[0].icnt2 = 1; + tr_req[0].icnt3 = 1; + tr_req[0].dim1 = tr0_cnt0; + + tr_req[0].daddr = dest; + tr_req[0].dicnt0 = tr0_cnt0; + tr_req[0].dicnt1 = tr0_cnt1; + tr_req[0].dicnt2 = 1; + tr_req[0].dicnt3 = 1; + tr_req[0].ddim1 = tr0_cnt0; + + if (num_tr == 2) { + cppi5_tr_init(&tr_req[1].flags, CPPI5_TR_TYPE15, false, true, + CPPI5_TR_EVENT_SIZE_COMPLETION, 0); + cppi5_tr_csf_set(&tr_req[1].flags, CPPI5_TR_CSF_SUPR_EVT); + + tr_req[1].addr = src + tr0_cnt1 * tr0_cnt0; + tr_req[1].icnt0 = tr1_cnt0; + tr_req[1].icnt1 = 1; + tr_req[1].icnt2 = 1; + tr_req[1].icnt3 = 1; + + tr_req[1].daddr = dest + tr0_cnt1 * tr0_cnt0; + tr_req[1].dicnt0 = tr1_cnt0; + tr_req[1].dicnt1 = 1; + tr_req[1].dicnt2 = 1; + tr_req[1].dicnt3 = 1; + } + + cppi5_tr_csf_set(&tr_req[num_tr - 1].flags, CPPI5_TR_CSF_EOP); + + if (uc->config.metadata_size) + d->vd.tx.metadata_ops = &metadata_ops; + + return vchan_tx_prep(&uc->vc, &d->vd, tx_flags); +} + +static void udma_issue_pending(struct dma_chan *chan) +{ + struct udma_chan *uc = to_udma_chan(chan); + unsigned long flags; + + spin_lock_irqsave(&uc->vc.lock, flags); + + /* If we have something pending and no active descriptor, then */ + if (vchan_issue_pending(&uc->vc) && !uc->desc) { + /* + * start a descriptor if the channel is NOT [marked as + * terminating _and_ it is still running (teardown has not + * completed yet)]. + */ + if (!(uc->state == UDMA_CHAN_IS_TERMINATING && + udma_is_chan_running(uc))) + udma_start(uc); + } + + spin_unlock_irqrestore(&uc->vc.lock, flags); +} + +static enum dma_status udma_tx_status(struct dma_chan *chan, + dma_cookie_t cookie, + struct dma_tx_state *txstate) +{ + struct udma_chan *uc = to_udma_chan(chan); + enum dma_status ret; + unsigned long flags; + + spin_lock_irqsave(&uc->vc.lock, flags); + + ret = dma_cookie_status(chan, cookie, txstate); + + if (ret == DMA_IN_PROGRESS && udma_is_chan_paused(uc)) + ret = DMA_PAUSED; + + if (ret == DMA_COMPLETE || !txstate) + goto out; + + if (uc->desc && uc->desc->vd.tx.cookie == cookie) { + u32 peer_bcnt = 0; + u32 bcnt = 0; + u32 residue = uc->desc->residue; + u32 delay = 0; + + if (uc->desc->dir == DMA_MEM_TO_DEV) { + bcnt = udma_tchanrt_read(uc->tchan, + UDMA_TCHAN_RT_SBCNT_REG); + + if (uc->config.ep_type != PSIL_EP_NATIVE) { + peer_bcnt = udma_tchanrt_read(uc->tchan, + UDMA_TCHAN_RT_PEER_BCNT_REG); + + if (bcnt > peer_bcnt) + delay = bcnt - peer_bcnt; + } + } else if (uc->desc->dir == DMA_DEV_TO_MEM) { + bcnt = udma_rchanrt_read(uc->rchan, + UDMA_RCHAN_RT_BCNT_REG); + + if (uc->config.ep_type != PSIL_EP_NATIVE) { + peer_bcnt = udma_rchanrt_read(uc->rchan, + UDMA_RCHAN_RT_PEER_BCNT_REG); + + if (peer_bcnt > bcnt) + delay = peer_bcnt - bcnt; + } + } else { + bcnt = udma_tchanrt_read(uc->tchan, + UDMA_TCHAN_RT_BCNT_REG); + } + + bcnt -= uc->bcnt; + if (bcnt && !(bcnt % uc->desc->residue)) + residue = 0; + else + residue -= bcnt % uc->desc->residue; + + if (!residue && (uc->config.dir == DMA_DEV_TO_MEM || !delay)) { + ret = DMA_COMPLETE; + delay = 0; + } + + dma_set_residue(txstate, residue); + dma_set_in_flight_bytes(txstate, delay); + + } else { + ret = DMA_COMPLETE; + } + +out: + spin_unlock_irqrestore(&uc->vc.lock, flags); + return ret; +} + +static int udma_pause(struct dma_chan *chan) +{ + struct udma_chan *uc = to_udma_chan(chan); + + if (!uc->desc) + return -EINVAL; + + /* pause the channel */ + switch (uc->desc->dir) { + case DMA_DEV_TO_MEM: + udma_rchanrt_update_bits(uc->rchan, + UDMA_RCHAN_RT_PEER_RT_EN_REG, + UDMA_PEER_RT_EN_PAUSE, + UDMA_PEER_RT_EN_PAUSE); + break; + case DMA_MEM_TO_DEV: + udma_tchanrt_update_bits(uc->tchan, + UDMA_TCHAN_RT_PEER_RT_EN_REG, + UDMA_PEER_RT_EN_PAUSE, + UDMA_PEER_RT_EN_PAUSE); + break; + case DMA_MEM_TO_MEM: + udma_tchanrt_update_bits(uc->tchan, UDMA_TCHAN_RT_CTL_REG, + UDMA_CHAN_RT_CTL_PAUSE, + UDMA_CHAN_RT_CTL_PAUSE); + break; + default: + return -EINVAL; + } + + return 0; +} + +static int udma_resume(struct dma_chan *chan) +{ + struct udma_chan *uc = to_udma_chan(chan); + + if (!uc->desc) + return -EINVAL; + + /* resume the channel */ + switch (uc->desc->dir) { + case DMA_DEV_TO_MEM: + udma_rchanrt_update_bits(uc->rchan, + UDMA_RCHAN_RT_PEER_RT_EN_REG, + UDMA_PEER_RT_EN_PAUSE, 0); + + break; + case DMA_MEM_TO_DEV: + udma_tchanrt_update_bits(uc->tchan, + UDMA_TCHAN_RT_PEER_RT_EN_REG, + UDMA_PEER_RT_EN_PAUSE, 0); + break; + case DMA_MEM_TO_MEM: + udma_tchanrt_update_bits(uc->tchan, UDMA_TCHAN_RT_CTL_REG, + UDMA_CHAN_RT_CTL_PAUSE, 0); + break; + default: + return -EINVAL; + } + + return 0; +} + +static int udma_terminate_all(struct dma_chan *chan) +{ + struct udma_chan *uc = to_udma_chan(chan); + unsigned long flags; + LIST_HEAD(head); + + spin_lock_irqsave(&uc->vc.lock, flags); + + if (udma_is_chan_running(uc)) + udma_stop(uc); + + if (uc->desc) { + uc->terminated_desc = uc->desc; + uc->desc = NULL; + uc->terminated_desc->terminated = true; + cancel_delayed_work(&uc->tx_drain.work); + } + + uc->paused = false; + + vchan_get_all_descriptors(&uc->vc, &head); + spin_unlock_irqrestore(&uc->vc.lock, flags); + vchan_dma_desc_free_list(&uc->vc, &head); + + return 0; +} + +static void udma_synchronize(struct dma_chan *chan) +{ + struct udma_chan *uc = to_udma_chan(chan); + unsigned long timeout = msecs_to_jiffies(1000); + + vchan_synchronize(&uc->vc); + + if (uc->state == UDMA_CHAN_IS_TERMINATING) { + timeout = wait_for_completion_timeout(&uc->teardown_completed, + timeout); + if (!timeout) { + dev_warn(uc->ud->dev, "chan%d teardown timeout!\n", + uc->id); + udma_dump_chan_stdata(uc); + udma_reset_chan(uc, true); + } + } + + udma_reset_chan(uc, false); + if (udma_is_chan_running(uc)) + dev_warn(uc->ud->dev, "chan%d refused to stop!\n", uc->id); + + cancel_delayed_work_sync(&uc->tx_drain.work); + udma_reset_rings(uc); +} + +static void udma_desc_pre_callback(struct virt_dma_chan *vc, + struct virt_dma_desc *vd, + struct dmaengine_result *result) +{ + struct udma_chan *uc = to_udma_chan(&vc->chan); + struct udma_desc *d; + + if (!vd) + return; + + d = to_udma_desc(&vd->tx); + + if (d->metadata_size) + udma_fetch_epib(uc, d); + + /* Provide residue information for the client */ + if (result) { + void *desc_vaddr = udma_curr_cppi5_desc_vaddr(d, d->desc_idx); + + if (cppi5_desc_get_type(desc_vaddr) == + CPPI5_INFO0_DESC_TYPE_VAL_HOST) { + result->residue = d->residue - + cppi5_hdesc_get_pktlen(desc_vaddr); + if (result->residue) + result->result = DMA_TRANS_ABORTED; + else + result->result = DMA_TRANS_NOERROR; + } else { + result->residue = 0; + result->result = DMA_TRANS_NOERROR; + } + } +} + +/* + * This tasklet handles the completion of a DMA descriptor by + * calling its callback and freeing it. + */ +static void udma_vchan_complete(unsigned long arg) +{ + struct virt_dma_chan *vc = (struct virt_dma_chan *)arg; + struct virt_dma_desc *vd, *_vd; + struct dmaengine_desc_callback cb; + LIST_HEAD(head); + + spin_lock_irq(&vc->lock); + list_splice_tail_init(&vc->desc_completed, &head); + vd = vc->cyclic; + if (vd) { + vc->cyclic = NULL; + dmaengine_desc_get_callback(&vd->tx, &cb); + } else { + memset(&cb, 0, sizeof(cb)); + } + spin_unlock_irq(&vc->lock); + + udma_desc_pre_callback(vc, vd, NULL); + dmaengine_desc_callback_invoke(&cb, NULL); + + list_for_each_entry_safe(vd, _vd, &head, node) { + struct dmaengine_result result; + + dmaengine_desc_get_callback(&vd->tx, &cb); + + list_del(&vd->node); + + udma_desc_pre_callback(vc, vd, &result); + dmaengine_desc_callback_invoke(&cb, &result); + + vchan_vdesc_fini(vd); + } +} + +static void udma_free_chan_resources(struct dma_chan *chan) +{ + struct udma_chan *uc = to_udma_chan(chan); + struct udma_dev *ud = to_udma_dev(chan->device); + + udma_terminate_all(chan); + if (uc->terminated_desc) { + udma_reset_chan(uc, false); + udma_reset_rings(uc); + } + + cancel_delayed_work_sync(&uc->tx_drain.work); + destroy_delayed_work_on_stack(&uc->tx_drain.work); + + if (uc->irq_num_ring > 0) { + free_irq(uc->irq_num_ring, uc); + + uc->irq_num_ring = 0; + } + if (uc->irq_num_udma > 0) { + free_irq(uc->irq_num_udma, uc); + + uc->irq_num_udma = 0; + } + + /* Release PSI-L pairing */ + if (uc->psil_paired) { + navss_psil_unpair(ud, uc->config.src_thread, + uc->config.dst_thread); + uc->psil_paired = false; + } + + vchan_free_chan_resources(&uc->vc); + tasklet_kill(&uc->vc.task); + + udma_free_tx_resources(uc); + udma_free_rx_resources(uc); + udma_reset_uchan(uc); + + if (uc->use_dma_pool) { + dma_pool_destroy(uc->hdesc_pool); + uc->use_dma_pool = false; + } +} + +static struct platform_driver udma_driver; + +static bool udma_dma_filter_fn(struct dma_chan *chan, void *param) +{ + struct udma_chan_config *ucc; + struct psil_endpoint_config *ep_config; + struct udma_chan *uc; + struct udma_dev *ud; + u32 *args; + + if (chan->device->dev->driver != &udma_driver.driver) + return false; + + uc = to_udma_chan(chan); + ucc = &uc->config; + ud = uc->ud; + args = param; + + ucc->remote_thread_id = args[0]; + + if (ucc->remote_thread_id & K3_PSIL_DST_THREAD_ID_OFFSET) + ucc->dir = DMA_MEM_TO_DEV; + else + ucc->dir = DMA_DEV_TO_MEM; + + ep_config = psil_get_ep_config(ucc->remote_thread_id); + if (IS_ERR(ep_config)) { + dev_err(ud->dev, "No configuration for psi-l thread 0x%04x\n", + ucc->remote_thread_id); + ucc->dir = DMA_MEM_TO_MEM; + ucc->remote_thread_id = -1; + return false; + } + + ucc->pkt_mode = ep_config->pkt_mode; + ucc->channel_tpl = ep_config->channel_tpl; + ucc->notdpkt = ep_config->notdpkt; + ucc->ep_type = ep_config->ep_type; + + if (ucc->ep_type != PSIL_EP_NATIVE) { + const struct udma_match_data *match_data = ud->match_data; + + if (match_data->flags & UDMA_FLAG_PDMA_ACC32) + ucc->enable_acc32 = ep_config->pdma_acc32; + if (match_data->flags & UDMA_FLAG_PDMA_BURST) + ucc->enable_burst = ep_config->pdma_burst; + } + + ucc->needs_epib = ep_config->needs_epib; + ucc->psd_size = ep_config->psd_size; + ucc->metadata_size = + (ucc->needs_epib ? CPPI5_INFO0_HDESC_EPIB_SIZE : 0) + + ucc->psd_size; + + if (ucc->pkt_mode) + ucc->hdesc_size = ALIGN(sizeof(struct cppi5_host_desc_t) + + ucc->metadata_size, ud->desc_align); + + dev_dbg(ud->dev, "chan%d: Remote thread: 0x%04x (%s)\n", uc->id, + ucc->remote_thread_id, dmaengine_get_direction_text(ucc->dir)); + + return true; +} + +static struct dma_chan *udma_of_xlate(struct of_phandle_args *dma_spec, + struct of_dma *ofdma) +{ + struct udma_dev *ud = ofdma->of_dma_data; + dma_cap_mask_t mask = ud->ddev.cap_mask; + struct dma_chan *chan; + + if (dma_spec->args_count != 1) + return NULL; + + chan = __dma_request_channel(&mask, udma_dma_filter_fn, + &dma_spec->args[0], ofdma->of_node); + if (!chan) { + dev_err(ud->dev, "get channel fail in %s.\n", __func__); + return ERR_PTR(-EINVAL); + } + + return chan; +} + +static struct udma_match_data am654_main_data = { + .psil_base = 0x1000, + .enable_memcpy_support = true, + .statictr_z_mask = GENMASK(11, 0), + .rchan_oes_offset = 0x2000, + .tpl_levels = 2, + .level_start_idx = { + [0] = 8, /* Normal channels */ + [1] = 0, /* High Throughput channels */ + }, +}; + +static struct udma_match_data am654_mcu_data = { + .psil_base = 0x6000, + .enable_memcpy_support = false, /* MEM_TO_MEM is slow via MCU UDMA */ + .statictr_z_mask = GENMASK(11, 0), + .rchan_oes_offset = 0x2000, + .tpl_levels = 2, + .level_start_idx = { + [0] = 2, /* Normal channels */ + [1] = 0, /* High Throughput channels */ + }, +}; + +static struct udma_match_data j721e_main_data = { + .psil_base = 0x1000, + .enable_memcpy_support = true, + .flags = UDMA_FLAG_PDMA_ACC32 | UDMA_FLAG_PDMA_BURST, + .statictr_z_mask = GENMASK(23, 0), + .rchan_oes_offset = 0x400, + .tpl_levels = 3, + .level_start_idx = { + [0] = 16, /* Normal channels */ + [1] = 4, /* High Throughput channels */ + [2] = 0, /* Ultra High Throughput channels */ + }, +}; + +static struct udma_match_data j721e_mcu_data = { + .psil_base = 0x6000, + .enable_memcpy_support = false, /* MEM_TO_MEM is slow via MCU UDMA */ + .flags = UDMA_FLAG_PDMA_ACC32 | UDMA_FLAG_PDMA_BURST, + .statictr_z_mask = GENMASK(23, 0), + .rchan_oes_offset = 0x400, + .tpl_levels = 2, + .level_start_idx = { + [0] = 2, /* Normal channels */ + [1] = 0, /* High Throughput channels */ + }, +}; + +static const struct of_device_id udma_of_match[] = { + { + .compatible = "ti,am654-navss-main-udmap", + .data = &am654_main_data, + }, + { + .compatible = "ti,am654-navss-mcu-udmap", + .data = &am654_mcu_data, + }, { + .compatible = "ti,j721e-navss-main-udmap", + .data = &j721e_main_data, + }, { + .compatible = "ti,j721e-navss-mcu-udmap", + .data = &j721e_mcu_data, + }, + { /* Sentinel */ }, +}; + +static int udma_get_mmrs(struct platform_device *pdev, struct udma_dev *ud) +{ + struct resource *res; + int i; + + for (i = 0; i < MMR_LAST; i++) { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + mmr_names[i]); + ud->mmrs[i] = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ud->mmrs[i])) + return PTR_ERR(ud->mmrs[i]); + } + + return 0; +} + +static int udma_setup_resources(struct udma_dev *ud) +{ + struct device *dev = ud->dev; + int ch_count, ret, i, j; + u32 cap2, cap3; + struct ti_sci_resource_desc *rm_desc; + struct ti_sci_resource *rm_res, irq_res; + struct udma_tisci_rm *tisci_rm = &ud->tisci_rm; + static const char * const range_names[] = { "ti,sci-rm-range-tchan", + "ti,sci-rm-range-rchan", + "ti,sci-rm-range-rflow" }; + + cap2 = udma_read(ud->mmrs[MMR_GCFG], 0x28); + cap3 = udma_read(ud->mmrs[MMR_GCFG], 0x2c); + + ud->rflow_cnt = cap3 & 0x3fff; + ud->tchan_cnt = cap2 & 0x1ff; + ud->echan_cnt = (cap2 >> 9) & 0x1ff; + ud->rchan_cnt = (cap2 >> 18) & 0x1ff; + ch_count = ud->tchan_cnt + ud->rchan_cnt; + + ud->tchan_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->tchan_cnt), + sizeof(unsigned long), GFP_KERNEL); + ud->tchans = devm_kcalloc(dev, ud->tchan_cnt, sizeof(*ud->tchans), + GFP_KERNEL); + ud->rchan_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->rchan_cnt), + sizeof(unsigned long), GFP_KERNEL); + ud->rchans = devm_kcalloc(dev, ud->rchan_cnt, sizeof(*ud->rchans), + GFP_KERNEL); + ud->rflow_gp_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->rflow_cnt), + sizeof(unsigned long), + GFP_KERNEL); + ud->rflow_gp_map_allocated = devm_kcalloc(dev, + BITS_TO_LONGS(ud->rflow_cnt), + sizeof(unsigned long), + GFP_KERNEL); + ud->rflow_in_use = devm_kcalloc(dev, BITS_TO_LONGS(ud->rflow_cnt), + sizeof(unsigned long), + GFP_KERNEL); + ud->rflows = devm_kcalloc(dev, ud->rflow_cnt, sizeof(*ud->rflows), + GFP_KERNEL); + + if (!ud->tchan_map || !ud->rchan_map || !ud->rflow_gp_map || + !ud->rflow_gp_map_allocated || !ud->tchans || !ud->rchans || + !ud->rflows || !ud->rflow_in_use) + return -ENOMEM; + + /* + * RX flows with the same Ids as RX channels are reserved to be used + * as default flows if remote HW can't generate flow_ids. Those + * RX flows can be requested only explicitly by id. + */ + bitmap_set(ud->rflow_gp_map_allocated, 0, ud->rchan_cnt); + + /* by default no GP rflows are assigned to Linux */ + bitmap_set(ud->rflow_gp_map, 0, ud->rflow_cnt); + + /* Get resource ranges from tisci */ + for (i = 0; i < RM_RANGE_LAST; i++) + tisci_rm->rm_ranges[i] = + devm_ti_sci_get_of_resource(tisci_rm->tisci, dev, + tisci_rm->tisci_dev_id, + (char *)range_names[i]); + + /* tchan ranges */ + rm_res = tisci_rm->rm_ranges[RM_RANGE_TCHAN]; + if (IS_ERR(rm_res)) { + bitmap_zero(ud->tchan_map, ud->tchan_cnt); + } else { + bitmap_fill(ud->tchan_map, ud->tchan_cnt); + for (i = 0; i < rm_res->sets; i++) { + rm_desc = &rm_res->desc[i]; + bitmap_clear(ud->tchan_map, rm_desc->start, + rm_desc->num); + dev_dbg(dev, "ti-sci-res: tchan: %d:%d\n", + rm_desc->start, rm_desc->num); + } + } + irq_res.sets = rm_res->sets; + + /* rchan and matching default flow ranges */ + rm_res = tisci_rm->rm_ranges[RM_RANGE_RCHAN]; + if (IS_ERR(rm_res)) { + bitmap_zero(ud->rchan_map, ud->rchan_cnt); + } else { + bitmap_fill(ud->rchan_map, ud->rchan_cnt); + for (i = 0; i < rm_res->sets; i++) { + rm_desc = &rm_res->desc[i]; + bitmap_clear(ud->rchan_map, rm_desc->start, + rm_desc->num); + dev_dbg(dev, "ti-sci-res: rchan: %d:%d\n", + rm_desc->start, rm_desc->num); + } + } + + irq_res.sets += rm_res->sets; + irq_res.desc = kcalloc(irq_res.sets, sizeof(*irq_res.desc), GFP_KERNEL); + rm_res = tisci_rm->rm_ranges[RM_RANGE_TCHAN]; + for (i = 0; i < rm_res->sets; i++) { + irq_res.desc[i].start = rm_res->desc[i].start; + irq_res.desc[i].num = rm_res->desc[i].num; + } + rm_res = tisci_rm->rm_ranges[RM_RANGE_RCHAN]; + for (j = 0; j < rm_res->sets; j++, i++) { + irq_res.desc[i].start = rm_res->desc[j].start + + ud->match_data->rchan_oes_offset; + irq_res.desc[i].num = rm_res->desc[j].num; + } + ret = ti_sci_inta_msi_domain_alloc_irqs(ud->dev, &irq_res); + kfree(irq_res.desc); + if (ret) { + dev_err(ud->dev, "Failed to allocate MSI interrupts\n"); + return ret; + } + + /* GP rflow ranges */ + rm_res = tisci_rm->rm_ranges[RM_RANGE_RFLOW]; + if (IS_ERR(rm_res)) { + /* all gp flows are assigned exclusively to Linux */ + bitmap_clear(ud->rflow_gp_map, ud->rchan_cnt, + ud->rflow_cnt - ud->rchan_cnt); + } else { + for (i = 0; i < rm_res->sets; i++) { + rm_desc = &rm_res->desc[i]; + bitmap_clear(ud->rflow_gp_map, rm_desc->start, + rm_desc->num); + dev_dbg(dev, "ti-sci-res: rflow: %d:%d\n", + rm_desc->start, rm_desc->num); + } + } + + ch_count -= bitmap_weight(ud->tchan_map, ud->tchan_cnt); + ch_count -= bitmap_weight(ud->rchan_map, ud->rchan_cnt); + if (!ch_count) + return -ENODEV; + + ud->channels = devm_kcalloc(dev, ch_count, sizeof(*ud->channels), + GFP_KERNEL); + if (!ud->channels) + return -ENOMEM; + + dev_info(dev, "Channels: %d (tchan: %u, rchan: %u, gp-rflow: %u)\n", + ch_count, + ud->tchan_cnt - bitmap_weight(ud->tchan_map, ud->tchan_cnt), + ud->rchan_cnt - bitmap_weight(ud->rchan_map, ud->rchan_cnt), + ud->rflow_cnt - bitmap_weight(ud->rflow_gp_map, + ud->rflow_cnt)); + + return ch_count; +} + +#define TI_UDMAC_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \ + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ + BIT(DMA_SLAVE_BUSWIDTH_3_BYTES) | \ + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) | \ + BIT(DMA_SLAVE_BUSWIDTH_8_BYTES)) + +static int udma_probe(struct platform_device *pdev) +{ + struct device_node *navss_node = pdev->dev.parent->of_node; + struct device *dev = &pdev->dev; + struct udma_dev *ud; + const struct of_device_id *match; + int i, ret; + int ch_count; + + ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(48)); + if (ret) + dev_err(dev, "failed to set dma mask stuff\n"); + + ud = devm_kzalloc(dev, sizeof(*ud), GFP_KERNEL); + if (!ud) + return -ENOMEM; + + ret = udma_get_mmrs(pdev, ud); + if (ret) + return ret; + + ud->tisci_rm.tisci = ti_sci_get_by_phandle(dev->of_node, "ti,sci"); + if (IS_ERR(ud->tisci_rm.tisci)) + return PTR_ERR(ud->tisci_rm.tisci); + + ret = of_property_read_u32(dev->of_node, "ti,sci-dev-id", + &ud->tisci_rm.tisci_dev_id); + if (ret) { + dev_err(dev, "ti,sci-dev-id read failure %d\n", ret); + return ret; + } + pdev->id = ud->tisci_rm.tisci_dev_id; + + ret = of_property_read_u32(navss_node, "ti,sci-dev-id", + &ud->tisci_rm.tisci_navss_dev_id); + if (ret) { + dev_err(dev, "NAVSS ti,sci-dev-id read failure %d\n", ret); + return ret; + } + + ud->tisci_rm.tisci_udmap_ops = &ud->tisci_rm.tisci->ops.rm_udmap_ops; + ud->tisci_rm.tisci_psil_ops = &ud->tisci_rm.tisci->ops.rm_psil_ops; + + ud->ringacc = of_k3_ringacc_get_by_phandle(dev->of_node, "ti,ringacc"); + if (IS_ERR(ud->ringacc)) + return PTR_ERR(ud->ringacc); + + dev->msi_domain = of_msi_get_domain(dev, dev->of_node, + DOMAIN_BUS_TI_SCI_INTA_MSI); + if (!dev->msi_domain) { + dev_err(dev, "Failed to get MSI domain\n"); + return -EPROBE_DEFER; + } + + match = of_match_node(udma_of_match, dev->of_node); + if (!match) { + dev_err(dev, "No compatible match found\n"); + return -ENODEV; + } + ud->match_data = match->data; + + dma_cap_set(DMA_SLAVE, ud->ddev.cap_mask); + dma_cap_set(DMA_CYCLIC, ud->ddev.cap_mask); + + ud->ddev.device_alloc_chan_resources = udma_alloc_chan_resources; + ud->ddev.device_config = udma_slave_config; + ud->ddev.device_prep_slave_sg = udma_prep_slave_sg; + ud->ddev.device_prep_dma_cyclic = udma_prep_dma_cyclic; + ud->ddev.device_issue_pending = udma_issue_pending; + ud->ddev.device_tx_status = udma_tx_status; + ud->ddev.device_pause = udma_pause; + ud->ddev.device_resume = udma_resume; + ud->ddev.device_terminate_all = udma_terminate_all; + ud->ddev.device_synchronize = udma_synchronize; + + ud->ddev.device_free_chan_resources = udma_free_chan_resources; + ud->ddev.src_addr_widths = TI_UDMAC_BUSWIDTHS; + ud->ddev.dst_addr_widths = TI_UDMAC_BUSWIDTHS; + ud->ddev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); + ud->ddev.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; + ud->ddev.copy_align = DMAENGINE_ALIGN_8_BYTES; + ud->ddev.desc_metadata_modes = DESC_METADATA_CLIENT | + DESC_METADATA_ENGINE; + if (ud->match_data->enable_memcpy_support) { + dma_cap_set(DMA_MEMCPY, ud->ddev.cap_mask); + ud->ddev.device_prep_dma_memcpy = udma_prep_dma_memcpy; + ud->ddev.directions |= BIT(DMA_MEM_TO_MEM); + } + + ud->ddev.dev = dev; + ud->dev = dev; + ud->psil_base = ud->match_data->psil_base; + + INIT_LIST_HEAD(&ud->ddev.channels); + INIT_LIST_HEAD(&ud->desc_to_purge); + + ch_count = udma_setup_resources(ud); + if (ch_count <= 0) + return ch_count; + + spin_lock_init(&ud->lock); + INIT_WORK(&ud->purge_work, udma_purge_desc_work); + + ud->desc_align = 64; + if (ud->desc_align < dma_get_cache_alignment()) + ud->desc_align = dma_get_cache_alignment(); + + for (i = 0; i < ud->tchan_cnt; i++) { + struct udma_tchan *tchan = &ud->tchans[i]; + + tchan->id = i; + tchan->reg_rt = ud->mmrs[MMR_TCHANRT] + i * 0x1000; + } + + for (i = 0; i < ud->rchan_cnt; i++) { + struct udma_rchan *rchan = &ud->rchans[i]; + + rchan->id = i; + rchan->reg_rt = ud->mmrs[MMR_RCHANRT] + i * 0x1000; + } + + for (i = 0; i < ud->rflow_cnt; i++) { + struct udma_rflow *rflow = &ud->rflows[i]; + + rflow->id = i; + } + + for (i = 0; i < ch_count; i++) { + struct udma_chan *uc = &ud->channels[i]; + + uc->ud = ud; + uc->vc.desc_free = udma_desc_free; + uc->id = i; + uc->tchan = NULL; + uc->rchan = NULL; + uc->config.remote_thread_id = -1; + uc->config.dir = DMA_MEM_TO_MEM; + uc->name = devm_kasprintf(dev, GFP_KERNEL, "%s chan%d", + dev_name(dev), i); + + vchan_init(&uc->vc, &ud->ddev); + /* Use custom vchan completion handling */ + tasklet_init(&uc->vc.task, udma_vchan_complete, + (unsigned long)&uc->vc); + init_completion(&uc->teardown_completed); + } + + ret = dma_async_device_register(&ud->ddev); + if (ret) { + dev_err(dev, "failed to register slave DMA engine: %d\n", ret); + return ret; + } + + platform_set_drvdata(pdev, ud); + + ret = of_dma_controller_register(dev->of_node, udma_of_xlate, ud); + if (ret) { + dev_err(dev, "failed to register of_dma controller\n"); + dma_async_device_unregister(&ud->ddev); + } + + return ret; +} + +static struct platform_driver udma_driver = { + .driver = { + .name = "ti-udma", + .of_match_table = udma_of_match, + .suppress_bind_attrs = true, + }, + .probe = udma_probe, +}; +builtin_platform_driver(udma_driver); diff --git a/drivers/dma/ti/k3-udma.h b/drivers/dma/ti/k3-udma.h new file mode 100644 index 000000000000..ff428f823e67 --- /dev/null +++ b/drivers/dma/ti/k3-udma.h @@ -0,0 +1,120 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com + */ + +#ifndef K3_UDMA_H_ +#define K3_UDMA_H_ + +#include + +/* Global registers */ +#define UDMA_REV_REG 0x0 +#define UDMA_PERF_CTL_REG 0x4 +#define UDMA_EMU_CTL_REG 0x8 +#define UDMA_PSIL_TO_REG 0x10 +#define UDMA_UTC_CTL_REG 0x1c +#define UDMA_CAP_REG(i) (0x20 + ((i) * 4)) +#define UDMA_RX_FLOW_ID_FW_OES_REG 0x80 +#define UDMA_RX_FLOW_ID_FW_STATUS_REG 0x88 + +/* TX chan RT regs */ +#define UDMA_TCHAN_RT_CTL_REG 0x0 +#define UDMA_TCHAN_RT_SWTRIG_REG 0x8 +#define UDMA_TCHAN_RT_STDATA_REG 0x80 + +#define UDMA_TCHAN_RT_PEER_REG(i) (0x200 + ((i) * 0x4)) +#define UDMA_TCHAN_RT_PEER_STATIC_TR_XY_REG \ + UDMA_TCHAN_RT_PEER_REG(0) /* PSI-L: 0x400 */ +#define UDMA_TCHAN_RT_PEER_STATIC_TR_Z_REG \ + UDMA_TCHAN_RT_PEER_REG(1) /* PSI-L: 0x401 */ +#define UDMA_TCHAN_RT_PEER_BCNT_REG \ + UDMA_TCHAN_RT_PEER_REG(4) /* PSI-L: 0x404 */ +#define UDMA_TCHAN_RT_PEER_RT_EN_REG \ + UDMA_TCHAN_RT_PEER_REG(8) /* PSI-L: 0x408 */ + +#define UDMA_TCHAN_RT_PCNT_REG 0x400 +#define UDMA_TCHAN_RT_BCNT_REG 0x408 +#define UDMA_TCHAN_RT_SBCNT_REG 0x410 + +/* RX chan RT regs */ +#define UDMA_RCHAN_RT_CTL_REG 0x0 +#define UDMA_RCHAN_RT_SWTRIG_REG 0x8 +#define UDMA_RCHAN_RT_STDATA_REG 0x80 + +#define UDMA_RCHAN_RT_PEER_REG(i) (0x200 + ((i) * 0x4)) +#define UDMA_RCHAN_RT_PEER_STATIC_TR_XY_REG \ + UDMA_RCHAN_RT_PEER_REG(0) /* PSI-L: 0x400 */ +#define UDMA_RCHAN_RT_PEER_STATIC_TR_Z_REG \ + UDMA_RCHAN_RT_PEER_REG(1) /* PSI-L: 0x401 */ +#define UDMA_RCHAN_RT_PEER_BCNT_REG \ + UDMA_RCHAN_RT_PEER_REG(4) /* PSI-L: 0x404 */ +#define UDMA_RCHAN_RT_PEER_RT_EN_REG \ + UDMA_RCHAN_RT_PEER_REG(8) /* PSI-L: 0x408 */ + +#define UDMA_RCHAN_RT_PCNT_REG 0x400 +#define UDMA_RCHAN_RT_BCNT_REG 0x408 +#define UDMA_RCHAN_RT_SBCNT_REG 0x410 + +/* UDMA_TCHAN_RT_CTL_REG/UDMA_RCHAN_RT_CTL_REG */ +#define UDMA_CHAN_RT_CTL_EN BIT(31) +#define UDMA_CHAN_RT_CTL_TDOWN BIT(30) +#define UDMA_CHAN_RT_CTL_PAUSE BIT(29) +#define UDMA_CHAN_RT_CTL_FTDOWN BIT(28) +#define UDMA_CHAN_RT_CTL_ERROR BIT(0) + +/* UDMA_TCHAN_RT_PEER_RT_EN_REG/UDMA_RCHAN_RT_PEER_RT_EN_REG (PSI-L: 0x408) */ +#define UDMA_PEER_RT_EN_ENABLE BIT(31) +#define UDMA_PEER_RT_EN_TEARDOWN BIT(30) +#define UDMA_PEER_RT_EN_PAUSE BIT(29) +#define UDMA_PEER_RT_EN_FLUSH BIT(28) +#define UDMA_PEER_RT_EN_IDLE BIT(1) + +/* + * UDMA_TCHAN_RT_PEER_STATIC_TR_XY_REG / + * UDMA_RCHAN_RT_PEER_STATIC_TR_XY_REG + */ +#define PDMA_STATIC_TR_X_MASK GENMASK(26, 24) +#define PDMA_STATIC_TR_X_SHIFT (24) +#define PDMA_STATIC_TR_Y_MASK GENMASK(11, 0) +#define PDMA_STATIC_TR_Y_SHIFT (0) + +#define PDMA_STATIC_TR_Y(x) \ + (((x) << PDMA_STATIC_TR_Y_SHIFT) & PDMA_STATIC_TR_Y_MASK) +#define PDMA_STATIC_TR_X(x) \ + (((x) << PDMA_STATIC_TR_X_SHIFT) & PDMA_STATIC_TR_X_MASK) + +#define PDMA_STATIC_TR_XY_ACC32 BIT(30) +#define PDMA_STATIC_TR_XY_BURST BIT(31) + +/* + * UDMA_TCHAN_RT_PEER_STATIC_TR_Z_REG / + * UDMA_RCHAN_RT_PEER_STATIC_TR_Z_REG + */ +#define PDMA_STATIC_TR_Z(x, mask) ((x) & (mask)) + +struct udma_dev; +struct udma_tchan; +struct udma_rchan; +struct udma_rflow; + +enum udma_rm_range { + RM_RANGE_TCHAN = 0, + RM_RANGE_RCHAN, + RM_RANGE_RFLOW, + RM_RANGE_LAST, +}; + +struct udma_tisci_rm { + const struct ti_sci_handle *tisci; + const struct ti_sci_rm_udmap_ops *tisci_udmap_ops; + u32 tisci_dev_id; + + /* tisci information for PSI-L thread pairing/unpairing */ + const struct ti_sci_rm_psil_ops *tisci_psil_ops; + u32 tisci_navss_dev_id; + + struct ti_sci_resource *rm_ranges[RM_RANGE_LAST]; +}; + +#endif /* K3_UDMA_H_ */ From patchwork Mon Dec 23 11:04:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 182391 Delivered-To: patch@linaro.org Received: by 2002:a92:a146:0:0:0:0:0 with SMTP id v67csp277538ili; Mon, 23 Dec 2019 03:06:18 -0800 (PST) X-Google-Smtp-Source: APXvYqyxC2bRDtULk/NuIx0sVmSn4T9Fb3pTVb6l+2JjJcMeX+RHDVZrcLdq+xu6zPPmF5xuDrbH X-Received: by 2002:aca:2109:: with SMTP id 9mr5225554oiz.119.1577099178694; 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[209.132.180.67]) by mx.google.com with ESMTP id n85si9068501oig.191.2019.12.23.03.06.18; Mon, 23 Dec 2019 03:06:18 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of dmaengine-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=UoxeAjlY; spf=pass (google.com: best guess record for domain of dmaengine-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=dmaengine-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726691AbfLWLGR (ORCPT + 3 others); Mon, 23 Dec 2019 06:06:17 -0500 Received: from fllv0015.ext.ti.com ([198.47.19.141]:52766 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726918AbfLWLGG (ORCPT ); Mon, 23 Dec 2019 06:06:06 -0500 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id xBNB5txe067332; Mon, 23 Dec 2019 05:05:55 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1577099155; bh=VgdWAAJ3Cz8tiJk/iLF7p/5t+YnecUVQdlQ8kNoKFXU=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=UoxeAjlYwCQ2sLKXKo2e9e6TOQhzNiiMKWLsTvljz/X0oleqHX+A9Bl8IJUh1FQnJ HBoP/HcHIvF5H/Zn5cGwoRVnF5aTyyomxVrlVGK7jUg4GjQFJK0Ky9eB7hbZ4ZCkQg 92hWHY1bcsTDib4jaKxFU2nFJDUJbfLbatbKBzpU= Received: from DFLE101.ent.ti.com (dfle101.ent.ti.com [10.64.6.22]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id xBNB5tJJ041498 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 23 Dec 2019 05:05:55 -0600 Received: from DFLE107.ent.ti.com (10.64.6.28) by DFLE101.ent.ti.com (10.64.6.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Mon, 23 Dec 2019 05:05:55 -0600 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE107.ent.ti.com (10.64.6.28) 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; Mon, 23 Dec 2019 05:05:55 -0600 Received: from feketebors.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id xBNB4eMP025693; Mon, 23 Dec 2019 05:05:51 -0600 From: Peter Ujfalusi To: , , , CC: , , , , , , , , , , , Subject: [PATCH v8 18/18] soc: ti: k3-ringacc: Allow the driver to be built as module Date: Mon, 23 Dec 2019 13:04:58 +0200 Message-ID: <20191223110458.30766-19-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191223110458.30766-1-peter.ujfalusi@ti.com> References: <20191223110458.30766-1-peter.ujfalusi@ti.com> MIME-Version: 1.0 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 The ring accelerator driver can be built as module since all depending functions are exported. Signed-off-by: Peter Ujfalusi Tested-by: Keerthy Reviewed-by: Grygorii Strashko --- drivers/soc/ti/Kconfig | 2 +- drivers/soc/ti/k3-ringacc.c | 29 ++++++++++++++++++++++++++--- 2 files changed, 27 insertions(+), 4 deletions(-) -- Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki diff --git a/drivers/soc/ti/Kconfig b/drivers/soc/ti/Kconfig index 4486e055794c..bdce98f68a3e 100644 --- a/drivers/soc/ti/Kconfig +++ b/drivers/soc/ti/Kconfig @@ -81,7 +81,7 @@ config TI_SCI_PM_DOMAINS rootfs may be available. config TI_K3_RINGACC - bool "K3 Ring accelerator Sub System" + tristate "K3 Ring accelerator Sub System" depends on ARCH_K3 || COMPILE_TEST depends on TI_SCI_INTA_IRQCHIP help diff --git a/drivers/soc/ti/k3-ringacc.c b/drivers/soc/ti/k3-ringacc.c index 5fb2ee2ac978..fd9f35b7c9a6 100644 --- a/drivers/soc/ti/k3-ringacc.c +++ b/drivers/soc/ti/k3-ringacc.c @@ -7,7 +7,7 @@ #include #include -#include +#include #include #include #include @@ -264,6 +264,11 @@ struct k3_ring *k3_ringacc_request_ring(struct k3_ringacc *ringacc, mutex_lock(&ringacc->req_lock); + if (!try_module_get(ringacc->dev->driver->owner)) { + mutex_unlock(&ringacc->req_lock); + return NULL; + } + if (id == K3_RINGACC_RING_ID_ANY) { /* Request for any general purpose ring */ struct ti_sci_resource_desc *gp_rings = @@ -308,6 +313,7 @@ struct k3_ring *k3_ringacc_request_ring(struct k3_ringacc *ringacc, return &ringacc->rings[id]; error: + module_put(ringacc->dev->driver->owner); mutex_unlock(&ringacc->req_lock); return NULL; } @@ -488,6 +494,8 @@ int k3_ringacc_ring_free(struct k3_ring *ring) no_init: clear_bit(ring->ring_id, ringacc->rings_inuse); + module_put(ringacc->dev->driver->owner); + out: mutex_unlock(&ringacc->req_lock); return 0; @@ -1140,18 +1148,33 @@ static int k3_ringacc_probe(struct platform_device *pdev) return 0; } +static int k3_ringacc_remove(struct platform_device *pdev) +{ + struct k3_ringacc *ringacc = dev_get_drvdata(&pdev->dev); + + mutex_lock(&k3_ringacc_list_lock); + list_del(&ringacc->list); + mutex_unlock(&k3_ringacc_list_lock); + return 0; +} + /* Match table for of_platform binding */ static const struct of_device_id k3_ringacc_of_match[] = { { .compatible = "ti,am654-navss-ringacc", }, {}, }; +MODULE_DEVICE_TABLE(of, k3_ringacc_of_match); static struct platform_driver k3_ringacc_driver = { .probe = k3_ringacc_probe, + .remove = k3_ringacc_remove, .driver = { .name = "k3-ringacc", .of_match_table = k3_ringacc_of_match, - .suppress_bind_attrs = true, }, }; -builtin_platform_driver(k3_ringacc_driver); +module_platform_driver(k3_ringacc_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("TI Ringacc driver for K3 SOCs"); +MODULE_AUTHOR("Grygorii Strashko ");