From patchwork Tue Sep 13 13:14:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikko Perttunen X-Patchwork-Id: 12974795 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9B1EEC6FA8A for ; Tue, 13 Sep 2022 13:15:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2C9A510E6FE; Tue, 13 Sep 2022 13:15:45 +0000 (UTC) Received: from mail.kapsi.fi (mail.kapsi.fi [IPv6:2001:67c:1be8::25]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4497E10E70F for ; Tue, 13 Sep 2022 13:15:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kapsi.fi; s=20161220; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=oQqM+pClrZfQCqMiQgtSnptBcoYj79KgVRq3HWP8sUE=; b=I+aoXXZXrAJz4xvOpHc3/VlBIw OjpuJOzkmDAhj9seeZOmBKdpoZ47n13HOlW2iFF5FthOpRhc+OPuhNWIBOskk1mrNnfe67prCKgMf +5AoOfLfpzpe5L0Dpz2aDV/OuCOA++EiaoFTFHcmnVZrPdg+ASJbUKe+4fIx+4srI3TPjsLgZ4cH+ 8ZCjHsFmpDOzQj0lOtteydGR37x1arfE6pKT/XzEmxUsyjFcjhzp6vAiRzEnugtZaXsmeFQH/P6CJ luysIU5p0qhp9OIxfVGQyRGnlOAj33RW/inxlLTkvo2A0da4kbpps4fFnvN3Bwg67Fuhf1yYSH6dx ZZqaBWRw==; Received: from 91-158-25-70.elisa-laajakaista.fi ([91.158.25.70] helo=toshino.localdomain) by mail.kapsi.fi with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1oY5ki-00EVnM-DJ; Tue, 13 Sep 2022 16:15:00 +0300 From: Mikko Perttunen To: Thierry Reding , David Airlie , Daniel Vetter , Rob Herring , Krzysztof Kozlowski , Jonathan Hunter Subject: [PATCH v2 7/8] drm/tegra: Add code for booting RISC-V based engines Date: Tue, 13 Sep 2022 16:14:45 +0300 Message-Id: <20220913131447.2877280-8-cyndis@kapsi.fi> X-Mailer: git-send-email 2.37.0 In-Reply-To: <20220913131447.2877280-1-cyndis@kapsi.fi> References: <20220913131447.2877280-1-cyndis@kapsi.fi> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 91.158.25.70 X-SA-Exim-Mail-From: cyndis@kapsi.fi X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Sameer Pujar , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Mikko Perttunen , linux-tegra@vger.kernel.org, Ashish Mhetre Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Mikko Perttunen Add helper code for booting RISC-V based engines where firmware is located in a carveout. Signed-off-by: Mikko Perttunen --- drivers/gpu/drm/tegra/Makefile | 3 +- drivers/gpu/drm/tegra/riscv.c | 106 +++++++++++++++++++++++++++++++++ drivers/gpu/drm/tegra/riscv.h | 30 ++++++++++ 3 files changed, 138 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/tegra/riscv.c create mode 100644 drivers/gpu/drm/tegra/riscv.h diff --git a/drivers/gpu/drm/tegra/Makefile b/drivers/gpu/drm/tegra/Makefile index df6cc986aeba..bb0d2c144b55 100644 --- a/drivers/gpu/drm/tegra/Makefile +++ b/drivers/gpu/drm/tegra/Makefile @@ -24,7 +24,8 @@ tegra-drm-y := \ gr3d.o \ falcon.o \ vic.o \ - nvdec.o + nvdec.o \ + riscv.o tegra-drm-y += trace.o diff --git a/drivers/gpu/drm/tegra/riscv.c b/drivers/gpu/drm/tegra/riscv.c new file mode 100644 index 000000000000..6580416408f8 --- /dev/null +++ b/drivers/gpu/drm/tegra/riscv.c @@ -0,0 +1,106 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022, NVIDIA Corporation. + */ + +#include +#include +#include +#include + +#include "riscv.h" + +#define RISCV_CPUCTL 0x4388 +#define RISCV_CPUCTL_STARTCPU_TRUE (1 << 0) +#define RISCV_BR_RETCODE 0x465c +#define RISCV_BR_RETCODE_RESULT_V(x) ((x) & 0x3) +#define RISCV_BR_RETCODE_RESULT_PASS_V 3 +#define RISCV_BCR_CTRL 0x4668 +#define RISCV_BCR_CTRL_CORE_SELECT_RISCV (1 << 4) +#define RISCV_BCR_DMACFG 0x466c +#define RISCV_BCR_DMACFG_TARGET_LOCAL_FB (0 << 0) +#define RISCV_BCR_DMACFG_LOCK_LOCKED (1 << 31) +#define RISCV_BCR_DMAADDR_PKCPARAM_LO 0x4670 +#define RISCV_BCR_DMAADDR_PKCPARAM_HI 0x4674 +#define RISCV_BCR_DMAADDR_FMCCODE_LO 0x4678 +#define RISCV_BCR_DMAADDR_FMCCODE_HI 0x467c +#define RISCV_BCR_DMAADDR_FMCDATA_LO 0x4680 +#define RISCV_BCR_DMAADDR_FMCDATA_HI 0x4684 +#define RISCV_BCR_DMACFG_SEC 0x4694 +#define RISCV_BCR_DMACFG_SEC_GSCID(v) ((v) << 16) + +static void riscv_writel(struct tegra_drm_riscv *riscv, u32 value, u32 offset) +{ + writel(value, riscv->regs + offset); +} + +int tegra_drm_riscv_read_descriptors(struct tegra_drm_riscv *riscv) +{ + struct tegra_drm_riscv_descriptor *bl = &riscv->bl_desc; + struct tegra_drm_riscv_descriptor *os = &riscv->os_desc; + const struct device_node *np = riscv->dev->of_node; + int err; + +#define READ_PROP(name, location) \ + err = of_property_read_u32(np, name, location); \ + if (err) { \ + dev_err(riscv->dev, "failed to read " name ": %d\n", err); \ + return err; \ + } + + READ_PROP("nvidia,bl-manifest-offset", &bl->manifest_offset); + READ_PROP("nvidia,bl-code-offset", &bl->code_offset); + READ_PROP("nvidia,bl-data-offset", &bl->data_offset); + READ_PROP("nvidia,os-manifest-offset", &os->manifest_offset); + READ_PROP("nvidia,os-code-offset", &os->code_offset); + READ_PROP("nvidia,os-data-offset", &os->data_offset); +#undef READ_PROP + + if (bl->manifest_offset == 0 && bl->code_offset == 0 && + bl->data_offset == 0 && os->manifest_offset == 0 && + os->code_offset == 0 && os->data_offset == 0) { + dev_err(riscv->dev, "descriptors not available\n"); + return -EINVAL; + } + + return 0; +} + +int tegra_drm_riscv_boot_bootrom(struct tegra_drm_riscv *riscv, phys_addr_t image_address, + u32 gscid, const struct tegra_drm_riscv_descriptor *desc) +{ + phys_addr_t addr; + int err; + u32 val; + + riscv_writel(riscv, RISCV_BCR_CTRL_CORE_SELECT_RISCV, RISCV_BCR_CTRL); + + addr = image_address + desc->manifest_offset; + riscv_writel(riscv, lower_32_bits(addr >> 8), RISCV_BCR_DMAADDR_PKCPARAM_LO); + riscv_writel(riscv, upper_32_bits(addr >> 8), RISCV_BCR_DMAADDR_PKCPARAM_HI); + + addr = image_address + desc->code_offset; + riscv_writel(riscv, lower_32_bits(addr >> 8), RISCV_BCR_DMAADDR_FMCCODE_LO); + riscv_writel(riscv, upper_32_bits(addr >> 8), RISCV_BCR_DMAADDR_FMCCODE_HI); + + addr = image_address + desc->data_offset; + riscv_writel(riscv, lower_32_bits(addr >> 8), RISCV_BCR_DMAADDR_FMCDATA_LO); + riscv_writel(riscv, upper_32_bits(addr >> 8), RISCV_BCR_DMAADDR_FMCDATA_HI); + + riscv_writel(riscv, RISCV_BCR_DMACFG_SEC_GSCID(gscid), RISCV_BCR_DMACFG_SEC); + riscv_writel(riscv, + RISCV_BCR_DMACFG_TARGET_LOCAL_FB | RISCV_BCR_DMACFG_LOCK_LOCKED, RISCV_BCR_DMACFG); + + riscv_writel(riscv, RISCV_CPUCTL_STARTCPU_TRUE, RISCV_CPUCTL); + + err = readl_poll_timeout( + riscv->regs + RISCV_BR_RETCODE, val, + RISCV_BR_RETCODE_RESULT_V(val) == RISCV_BR_RETCODE_RESULT_PASS_V, + 10, 100000); + if (err) { + dev_err(riscv->dev, "error during bootrom execution. BR_RETCODE=%d\n", val); + return err; + } + + return 0; +} diff --git a/drivers/gpu/drm/tegra/riscv.h b/drivers/gpu/drm/tegra/riscv.h new file mode 100644 index 000000000000..bbeb2db078b6 --- /dev/null +++ b/drivers/gpu/drm/tegra/riscv.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2022, NVIDIA Corporation. + */ + +#ifndef DRM_TEGRA_RISCV_H +#define DRM_TEGRA_RISCV_H + +struct tegra_drm_riscv_descriptor { + u32 manifest_offset; + u32 code_offset; + u32 code_size; + u32 data_offset; + u32 data_size; +}; + +struct tegra_drm_riscv { + /* User initializes */ + struct device *dev; + void __iomem *regs; + + struct tegra_drm_riscv_descriptor bl_desc; + struct tegra_drm_riscv_descriptor os_desc; +}; + +int tegra_drm_riscv_read_descriptors(struct tegra_drm_riscv *riscv); +int tegra_drm_riscv_boot_bootrom(struct tegra_drm_riscv *riscv, phys_addr_t image_address, + u32 gscid, const struct tegra_drm_riscv_descriptor *desc); + +#endif