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Thu, 5 Dec 2024 06:59:12 -0800 From: Mohan Kumar D To: , , , CC: , , , , , , , Mohan Kumar D Subject: [PATCH 2/2] dmaengine: tegra210-adma: Support channel page Date: Thu, 5 Dec 2024 20:28:59 +0530 Message-ID: <20241205145859.2331691-3-mkumard@nvidia.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241205145859.2331691-1-mkumard@nvidia.com> References: <20241205145859.2331691-1-mkumard@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF000023D6:EE_|SJ1PR12MB6339:EE_ X-MS-Office365-Filtering-Correlation-Id: a4c1d034-2b61-42c0-a315-08dd153d6bd4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|82310400026|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?l9SsjxSl8XnU1VGNIERURWd5ZBCzq7cjmffrTqgfwVt0Xpalf3rfvwtlfcyg?= =?us-ascii?Q?uFpXpAjYAZzf28wE/ymLBXBnU/qsV9h/e0j6LGT6l+KyRUut3Bw5dKfDgA9j?= =?us-ascii?Q?hT97ZxW9MAbgIsQot2L06iz43LIfEv2vK87onMLh6k7amEZTX+sO2fNCrBsY?= =?us-ascii?Q?dQbad9MQO09+WnJmFvA1wZj5fPl7o+/HY7BfGJWFahG4kHxQI5nQO3JCENAl?= =?us-ascii?Q?x+35Tvn0TPtjqDJFY0FVwINq1nWvCg9IAJ9FK6SWxL7vQCePcoBZmnX8Y0tB?= =?us-ascii?Q?w3e9n+JrTecjz9g2D3Nj9pNk3UQtYtUpsdeCcrU98l5fbMwqzBQ56ne8jmSM?= =?us-ascii?Q?dJIu+Ritvoan3NCMUJLMYtRvsiDyCG4F8kOJfQ+mDkoZXa1KeD/Kq0k9S0VR?= =?us-ascii?Q?VPjncfd/7Vic2THOfNs4mN2SoThTUcX84Jb8YcCutR/ufWouCJaKFNYTkyo4?= =?us-ascii?Q?Dt6QgRR21Y+d2KGywd/X1a9uZQQ0MOC6ZO/jawu7lDg0sAVcorNUtFzBv1x3?= =?us-ascii?Q?BDTPgRupLOCkxWwzd6gcTOVkKlJHuwXcdzPE0WK1oeFNsGnF0bX24vRLBiUO?= =?us-ascii?Q?CzGpZO6m1VnUIRJxtq0nm6h3ElPrAcxS6w9kkC6U04LrbprqI8gKijyrybxN?= =?us-ascii?Q?73EnCgsX7OMOgUOfMHLd7NZxrc4SpA56Z2PDK2KO8WZDUMOQiYFs8qzYsgSy?= =?us-ascii?Q?1ND+Y0VYZUm5TpdS+EPepFiuWQ4uf5O2FyVw0unnqMyiei9C7bNGse4QzDQm?= =?us-ascii?Q?yRRQyhBUrIlzLMx87Z0OncGGnXYdP/ujin8sJR2nISCEjT/o895XlB3F9z6N?= =?us-ascii?Q?jVkr/3sFv4DxxVyVf9/vuAaTnpQq4HEe2OZaYhAeDrkRO7NDjeuY5yXXPThX?= =?us-ascii?Q?qE0B5yEWm4Cwxs9pGHaCznfJnztfSFo55ODkgIMuo2e4bTlVUozbpK69nHe+?= =?us-ascii?Q?kUFkQGR/QrL1GXzR6CfD8xCEMr1pRWR0Ozb+a0lfAZ5sHcHRDJnhiIQng5US?= =?us-ascii?Q?mjyOaa1SpuXluB0E4+vgZJXILxJyKPfJ07VZdrg3bWZ/5mdbtyQRUX0Wxib4?= =?us-ascii?Q?ZMevJPePWzHATR7bb38yCV7NnELOoNtXT0eo2j1e9hx731/y/kI+lOMvH2LP?= =?us-ascii?Q?JkDoDHijzV/h145nHJay6BapR/udNrvm9XAQJnj4t99/0DIH0Gx0CWkiXESs?= =?us-ascii?Q?RtaRiybRIsYYK794YMIqfa2z8HeXgm3Ann3bkvMilUWMcUEY+cooqBnZTZxg?= =?us-ascii?Q?vBDmCpIOHf+8+GVHZFitwNYi2YpzlPHBuNBtfmmIi9cXeXuQP6gBmU/Fp/iA?= =?us-ascii?Q?RRC+QRtwK7WmZPuX08E767Wlvk7AOhwL4fB4dksCSZUBfH0WibbTX+k48Mhi?= =?us-ascii?Q?mJdT2RLd+ARKQEJSnXfxBex4NRBbXzFwFwsMA65IDi/Zp3Cvaspw03R3rMj+?= =?us-ascii?Q?MMO3DTBynqURsp/WA8Hd19xNTpo7TxpB?= X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(376014)(82310400026)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Dec 2024 14:59:30.1826 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a4c1d034-2b61-42c0-a315-08dd153d6bd4 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF000023D6.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ1PR12MB6339 Content-Type: text/plain; charset="utf-8" Multiple ADMA Channel page hardware support has been added from TEGRA186 and onwards. - Add support in the tegra adma driver to handle selective channel page usage - Make global register programming optional Signed-off-by: Mohan Kumar D --- drivers/dma/tegra210-adma.c | 86 ++++++++++++++++++++++++++++++++----- 1 file changed, 76 insertions(+), 10 deletions(-) diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c index 2953008d42ef..6896da8ac7ef 100644 --- a/drivers/dma/tegra210-adma.c +++ b/drivers/dma/tegra210-adma.c @@ -43,6 +43,10 @@ #define ADMA_CH_CONFIG_MAX_BUFS 8 #define TEGRA186_ADMA_CH_CONFIG_OUTSTANDING_REQS(reqs) (reqs << 4) =20 +#define TEGRA186_ADMA_GLOBAL_PAGE_CHGRP 0x30 +#define TEGRA186_ADMA_GLOBAL_PAGE_RX_REQ 0x70 +#define TEGRA186_ADMA_GLOBAL_PAGE_TX_REQ 0x84 + #define ADMA_CH_FIFO_CTRL 0x2c #define ADMA_CH_TX_FIFO_SIZE_SHIFT 8 #define ADMA_CH_RX_FIFO_SIZE_SHIFT 0 @@ -96,6 +100,7 @@ struct tegra_adma_chip_data { unsigned int ch_fifo_size_mask; unsigned int sreq_index_offset; bool has_outstanding_reqs; + void (*set_global_pg_config)(struct tegra_adma *tdma); }; =20 /* @@ -151,6 +156,7 @@ struct tegra_adma { struct dma_device dma_dev; struct device *dev; void __iomem *base_addr; + void __iomem *ch_base_addr; struct clk *ahub_clk; unsigned int nr_channels; unsigned long *dma_chan_mask; @@ -159,6 +165,7 @@ struct tegra_adma { =20 /* Used to store global command register state when suspending */ unsigned int global_cmd; + unsigned int ch_page_no; =20 const struct tegra_adma_chip_data *cdata; =20 @@ -176,6 +183,11 @@ static inline u32 tdma_read(struct tegra_adma *tdma, u= 32 reg) return readl(tdma->base_addr + tdma->cdata->global_reg_offset + reg); } =20 +static inline void tdma_ch_global_write(struct tegra_adma *tdma, u32 reg, = u32 val) +{ + writel(val, tdma->ch_base_addr + tdma->cdata->global_reg_offset + reg); +} + static inline void tdma_ch_write(struct tegra_adma_chan *tdc, u32 reg, u32= val) { writel(val, tdc->chan_addr + reg); @@ -217,13 +229,30 @@ static int tegra_adma_slave_config(struct dma_chan *d= c, return 0; } =20 +static void tegra186_adma_global_page_config(struct tegra_adma *tdma) +{ + /* + * Clear the default page1 channel group configs and program + * the global registers based on the actual page usage + */ + tdma_write(tdma, TEGRA186_ADMA_GLOBAL_PAGE_CHGRP, 0); + tdma_write(tdma, TEGRA186_ADMA_GLOBAL_PAGE_RX_REQ, 0); + tdma_write(tdma, TEGRA186_ADMA_GLOBAL_PAGE_TX_REQ, 0); + tdma_write(tdma, TEGRA186_ADMA_GLOBAL_PAGE_CHGRP + (tdma->ch_page_no * 0x= 4), 0xff); + tdma_write(tdma, TEGRA186_ADMA_GLOBAL_PAGE_RX_REQ + (tdma->ch_page_no * 0= x4), 0x1ffffff); + tdma_write(tdma, TEGRA186_ADMA_GLOBAL_PAGE_TX_REQ + (tdma->ch_page_no * 0= x4), 0xffffff); +} + static int tegra_adma_init(struct tegra_adma *tdma) { u32 status; int ret; =20 - /* Clear any interrupts */ - tdma_write(tdma, tdma->cdata->ch_base_offset + tdma->cdata->global_int_cl= ear, 0x1); + /* Clear any channels group global interrupts */ + tdma_ch_global_write(tdma, tdma->cdata->global_int_clear, 0x1); + + if (!tdma->base_addr) + return 0; =20 /* Assert soft reset */ tdma_write(tdma, ADMA_GLOBAL_SOFT_RESET, 0x1); @@ -237,6 +266,9 @@ static int tegra_adma_init(struct tegra_adma *tdma) if (ret) return ret; =20 + if (tdma->cdata->set_global_pg_config) + tdma->cdata->set_global_pg_config(tdma); + /* Enable global ADMA registers */ tdma_write(tdma, ADMA_GLOBAL_CMD, 1); =20 @@ -736,7 +768,9 @@ static int __maybe_unused tegra_adma_runtime_suspend(st= ruct device *dev) struct tegra_adma_chan *tdc; int i; =20 - tdma->global_cmd =3D tdma_read(tdma, ADMA_GLOBAL_CMD); + if (tdma->base_addr) + tdma->global_cmd =3D tdma_read(tdma, ADMA_GLOBAL_CMD); + if (!tdma->global_cmd) goto clk_disable; =20 @@ -777,7 +811,11 @@ static int __maybe_unused tegra_adma_runtime_resume(st= ruct device *dev) dev_err(dev, "ahub clk_enable failed: %d\n", ret); return ret; } - tdma_write(tdma, ADMA_GLOBAL_CMD, tdma->global_cmd); + if (tdma->base_addr) { + tdma_write(tdma, ADMA_GLOBAL_CMD, tdma->global_cmd); + if (tdma->cdata->set_global_pg_config) + tdma->cdata->set_global_pg_config(tdma); + } =20 if (!tdma->global_cmd) return 0; @@ -817,6 +855,7 @@ static const struct tegra_adma_chip_data tegra210_chip_= data =3D { .ch_fifo_size_mask =3D 0xf, .sreq_index_offset =3D 2, .has_outstanding_reqs =3D false, + .set_global_pg_config =3D NULL, }; =20 static const struct tegra_adma_chip_data tegra186_chip_data =3D { @@ -833,6 +872,7 @@ static const struct tegra_adma_chip_data tegra186_chip_= data =3D { .ch_fifo_size_mask =3D 0x1f, .sreq_index_offset =3D 4, .has_outstanding_reqs =3D true, + .set_global_pg_config =3D tegra186_adma_global_page_config, }; =20 static const struct of_device_id tegra_adma_of_match[] =3D { @@ -846,7 +886,8 @@ static int tegra_adma_probe(struct platform_device *pde= v) { const struct tegra_adma_chip_data *cdata; struct tegra_adma *tdma; - int ret, i; + struct resource *res_page, *res_base; + int ret, i, page_no; =20 cdata =3D of_device_get_match_data(&pdev->dev); if (!cdata) { @@ -865,9 +906,35 @@ static int tegra_adma_probe(struct platform_device *pd= ev) tdma->nr_channels =3D cdata->nr_channels; platform_set_drvdata(pdev, tdma); =20 - tdma->base_addr =3D devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(tdma->base_addr)) - return PTR_ERR(tdma->base_addr); + res_page =3D platform_get_resource_byname(pdev, IORESOURCE_MEM, "page"); + if (res_page) { + tdma->ch_base_addr =3D devm_ioremap_resource(&pdev->dev, res_page); + if (IS_ERR(tdma->ch_base_addr)) + return PTR_ERR(tdma->ch_base_addr); + + res_base =3D platform_get_resource_byname(pdev, IORESOURCE_MEM, "global"= ); + if (res_base) { + page_no =3D (res_page->start - res_base->start) / cdata->ch_base_offset; + if (page_no <=3D 0) + return -EINVAL; + tdma->ch_page_no =3D page_no - 1; + tdma->base_addr =3D devm_ioremap_resource(&pdev->dev, res_base); + if (IS_ERR(tdma->base_addr)) + return PTR_ERR(tdma->base_addr); + } + } else { + /* If no 'page' property found, then reg DT binding would be legacy */ + res_base =3D platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (res_base) { + tdma->base_addr =3D devm_ioremap_resource(&pdev->dev, res_base); + if (IS_ERR(tdma->base_addr)) + return PTR_ERR(tdma->base_addr); + } else { + return -ENODEV; + } + + tdma->ch_base_addr =3D tdma->base_addr + cdata->ch_base_offset; + } =20 tdma->ahub_clk =3D devm_clk_get(&pdev->dev, "d_audio"); if (IS_ERR(tdma->ahub_clk)) { @@ -900,8 +967,7 @@ static int tegra_adma_probe(struct platform_device *pde= v) if (!test_bit(i, tdma->dma_chan_mask)) continue; =20 - tdc->chan_addr =3D tdma->base_addr + cdata->ch_base_offset - + (cdata->ch_reg_size * i); + tdc->chan_addr =3D tdma->ch_base_addr + (cdata->ch_reg_size * i); =20 tdc->irq =3D of_irq_get(pdev->dev.of_node, i); if (tdc->irq <=3D 0) { --=20 2.25.1