From patchwork Fri Jul 3 09:02:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gokul Sriram Palanisamy X-Patchwork-Id: 11641391 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E232092A for ; Fri, 3 Jul 2020 09:03:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D3CBD20870 for ; Fri, 3 Jul 2020 09:03:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726304AbgGCJDT (ORCPT ); Fri, 3 Jul 2020 05:03:19 -0400 Received: from alexa-out.qualcomm.com ([129.46.98.28]:17756 "EHLO alexa-out.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725648AbgGCJDS (ORCPT ); Fri, 3 Jul 2020 05:03:18 -0400 Received: from ironmsg08-lv.qualcomm.com ([10.47.202.152]) by alexa-out.qualcomm.com with ESMTP; 03 Jul 2020 02:03:17 -0700 Received: from ironmsg02-blr.qualcomm.com ([10.86.208.131]) by ironmsg08-lv.qualcomm.com with ESMTP/TLS/AES256-SHA; 03 Jul 2020 02:03:15 -0700 Received: from gokulsri-linux.qualcomm.com ([10.201.2.207]) by ironmsg02-blr.qualcomm.com with ESMTP; 03 Jul 2020 14:32:54 +0530 Received: by gokulsri-linux.qualcomm.com (Postfix, from userid 432570) id ABA6C21694; Fri, 3 Jul 2020 14:32:52 +0530 (IST) From: Gokul Sriram Palanisamy To: gokulsri@codeaurora.org, sboyd@kernel.org, agross@kernel.org, bjorn.andersson@linaro.org, david.brown@linaro.org, devicetree@vger.kernel.org, jassisinghbrar@gmail.com, linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-remoteproc@vger.kernel.org, mark.rutland@arm.com, mturquette@baylibre.com, ohad@wizery.com, robh+dt@kernel.org, sricharan@codeaurora.org, nprakash@codeaurora.org Subject: [PATCH V6 02/10] remoteproc: qcom: Add secure PIL support Date: Fri, 3 Jul 2020 14:32:44 +0530 Message-Id: <1593766972-29101-3-git-send-email-gokulsri@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1593766972-29101-1-git-send-email-gokulsri@codeaurora.org> References: <1593766972-29101-1-git-send-email-gokulsri@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org IPQ8074 uses secure PIL. Hence, adding the support for the same. Signed-off-by: Gokul Sriram Palanisamy Signed-off-by: Sricharan R Signed-off-by: Nikhil Prakash V --- drivers/remoteproc/qcom_q6v5_wcss.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c index 9e9d702..7fd494f 100644 --- a/drivers/remoteproc/qcom_q6v5_wcss.c +++ b/drivers/remoteproc/qcom_q6v5_wcss.c @@ -19,6 +19,7 @@ #include #include #include +#include #include "qcom_common.h" #include "qcom_q6v5.h" @@ -86,6 +87,9 @@ #define TCSR_WCSS_CLK_ENABLE 0x14 #define MAX_HALT_REG 3 + +#define WCNSS_PAS_ID 6 + enum { WCSS_IPQ8074, WCSS_QCS404, @@ -134,6 +138,7 @@ struct q6v5_wcss { int crash_reason_smem; u32 version; bool requires_force_stop; + bool need_mem_protection; struct qcom_rproc_glink glink_subdev; struct qcom_rproc_ssr ssr_subdev; @@ -152,6 +157,7 @@ struct wcss_data { int ssctl_id; const struct rproc_ops *ops; bool requires_force_stop; + bool need_mem_protection; }; static int q6v5_wcss_reset(struct q6v5_wcss *wcss) @@ -251,6 +257,15 @@ static int q6v5_wcss_start(struct rproc *rproc) qcom_q6v5_prepare(&wcss->q6v5); + if (wcss->need_mem_protection) { + ret = qcom_scm_pas_auth_and_reset(WCNSS_PAS_ID); + if (ret) { + dev_err(wcss->dev, "wcss_reset failed\n"); + return ret; + } + goto wait_for_reset; + } + /* Release Q6 and WCSS reset */ ret = reset_control_deassert(wcss->wcss_reset); if (ret) { @@ -285,6 +300,7 @@ static int q6v5_wcss_start(struct rproc *rproc) if (ret) goto wcss_q6_reset; +wait_for_reset: ret = qcom_q6v5_wait_for_start(&wcss->q6v5, 5 * HZ); if (ret == -ETIMEDOUT) dev_err(wcss->dev, "start timed out\n"); @@ -717,6 +733,15 @@ static int q6v5_wcss_stop(struct rproc *rproc) struct q6v5_wcss *wcss = rproc->priv; int ret; + if (wcss->need_mem_protection) { + ret = qcom_scm_pas_shutdown(WCNSS_PAS_ID); + if (ret) { + dev_err(wcss->dev, "not able to shutdown\n"); + return ret; + } + goto pas_done; + } + /* WCSS powerdown */ if (wcss->requires_force_stop) { ret = qcom_q6v5_request_stop(&wcss->q6v5); @@ -741,6 +766,7 @@ static int q6v5_wcss_stop(struct rproc *rproc) return ret; } +pas_done: clk_disable_unprepare(wcss->prng_clk); qcom_q6v5_unprepare(&wcss->q6v5); @@ -763,6 +789,12 @@ static int q6v5_wcss_load(struct rproc *rproc, const struct firmware *fw) { struct q6v5_wcss *wcss = rproc->priv; + if (wcss->need_mem_protection) + return qcom_mdt_load(wcss->dev, fw, rproc->firmware, + WCNSS_PAS_ID, wcss->mem_region, + wcss->mem_phys, wcss->mem_size, + &wcss->mem_reloc); + return qcom_mdt_load_no_init(wcss->dev, fw, rproc->firmware, 0, wcss->mem_region, wcss->mem_phys, wcss->mem_size, &wcss->mem_reloc); @@ -1025,6 +1057,9 @@ static int q6v5_wcss_probe(struct platform_device *pdev) if (!desc) return -EINVAL; + if (desc->need_mem_protection && !qcom_scm_is_available()) + return -EPROBE_DEFER; + rproc = rproc_alloc(&pdev->dev, pdev->name, desc->ops, desc->firmware_name, sizeof(*wcss)); if (!rproc) { @@ -1038,6 +1073,7 @@ static int q6v5_wcss_probe(struct platform_device *pdev) wcss->version = desc->version; wcss->requires_force_stop = desc->requires_force_stop; + wcss->need_mem_protection = desc->need_mem_protection; ret = q6v5_wcss_init_mmio(wcss, pdev); if (ret) @@ -1106,6 +1142,7 @@ static const struct wcss_data wcss_ipq8074_res_init = { .wcss_q6_reset_required = true, .ops = &q6v5_wcss_ipq8074_ops, .requires_force_stop = true, + .need_mem_protection = true, }; static const struct wcss_data wcss_qcs404_res_init = {