From patchwork Wed Feb 22 14:44:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 60560 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp615447wrd; Wed, 22 Feb 2023 06:46:07 -0800 (PST) X-Google-Smtp-Source: AK7set9cDju/otgmOshsIFUiso/ls7IdgdsBI65pnDDh3XGxoiIs2zjfOlDrWk589FtTyYfQk5E3 X-Received: by 2002:aa7:db44:0:b0:4ac:b309:3d76 with SMTP id n4-20020aa7db44000000b004acb3093d76mr8405076edt.31.1677077167281; Wed, 22 Feb 2023 06:46:07 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1677077167; cv=none; d=google.com; s=arc-20160816; b=YhGE+bgMXP+D7UYL/42iu9MxxlqdGY8td+96WC8FbrRwlPwRjVsOrO/QqoXhe8r2bG cbBiqepj8m5Kowp7CE9jW2qDvBoMBneVUD3irnTJzE7gslJN8IaYieZGK+BfCUhc0316 DGIw5+3ZZI2gVi+MfcQqgSR5VkzlmaqMOndDg2lOeUZaLI2bfgLACOakiJxBD+fYwZgW Hnyjj6ewTpotQrBpI99LT7ZVUl+MFuoIqE9zSejZssOSrLPBkCqbpDwgo6y6X4nOiVuS iRqQRtADvK23Ugoz9FU7kMID0Ceat1OacuqfBSHHzLpoArx2gvUIlJ9Z2im9RYY7Z9vY D7Tw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from:dkim-signature; bh=5xj+mM0ucKmHJT5sr91ZY2NlPnqIfjLGto59YBLJZG8=; b=DJfLfbY7Hom3M1CLKw8eDvug3rdkfwSSOkWxlpCYKbWaky/BCnIMUvsdaYEe9Q/U4b 5+ObLFPbUyMCv1BxHGGcGauUFeZaAGCWBoIcv7CYLCNZGqHwrHKsJcaGiZm7G5wRJIMf i/VX1zqrBPVPfBLAvvwalunfq+bDO/86SiLOMRmCHBuswLj2bJ1DaqjrY4cf7fP7KmgV BiWruBhbturyCoIVwxkSr3UXi2l8XjF/vR+CBj9nXlbK+U6yMOAgEsImqpxPWypm+wqH vYXEgT6zcyG9F8D5d6oUu+6pMB1FanhjHgN0viOf8cG7eFkburNqt1Yr2nlqkItTuC4D NWLQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=mm5b3EYo; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from out1.vger.email (out1.vger.email. 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([178.197.216.144]) by smtp.gmail.com with ESMTPSA id o10-20020a1c750a000000b003e7c89b3514sm5059776wmc.23.2023.02.22.06.44.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Feb 2023 06:44:15 -0800 (PST) From: Krzysztof Kozlowski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Vinod Koul , Bard Liao , Pierre-Louis Bossart , Sanyog Kale , linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org Cc: Krzysztof Kozlowski Subject: [PATCH 1/2] soundwire: qcom: define hardcoded version magic numbers Date: Wed, 22 Feb 2023 15:44:11 +0100 Message-Id: <20230222144412.237832-1-krzysztof.kozlowski@linaro.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1758542867929787336?= X-GMAIL-MSGID: =?utf-8?q?1758542867929787336?= Use a define instead of hard-coded register values for Soundwire hardware version number, because it is a bit easier to read and allows to drop explaining comment. Signed-off-by: Krzysztof Kozlowski Reviewed-by: Konrad Dybcio Reviewed-by: Srinivas Kandagatla --- drivers/soundwire/qcom.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c index ba502129150d..79bebcecde6d 100644 --- a/drivers/soundwire/qcom.c +++ b/drivers/soundwire/qcom.c @@ -28,6 +28,9 @@ #define SWRM_LINK_MANAGER_EE 0x018 #define SWRM_EE_CPU 1 #define SWRM_FRM_GEN_ENABLED BIT(0) +#define SWRM_VERSION_1_3_0 0x01030000 +#define SWRM_VERSION_1_5_1 0x01050001 +#define SWRM_VERSION_1_7_0 0x01070000 #define SWRM_COMP_HW_VERSION 0x00 #define SWRM_COMP_CFG_ADDR 0x04 #define SWRM_COMP_CFG_IRQ_LEVEL_OR_PULSE_MSK BIT(1) @@ -351,8 +354,7 @@ static int qcom_swrm_cmd_fifo_wr_cmd(struct qcom_swrm_ctrl *swrm, u8 cmd_data, /* Its assumed that write is okay as we do not get any status back */ swrm->reg_write(swrm, SWRM_CMD_FIFO_WR_CMD, val); - /* version 1.3 or less */ - if (swrm->version <= 0x01030000) + if (swrm->version <= SWRM_VERSION_1_3_0) usleep_range(150, 155); if (cmd_id == SWR_BROADCAST_CMD_ID) { @@ -695,7 +697,7 @@ static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl) u32p_replace_bits(&val, SWRM_DEF_CMD_NO_PINGS, SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK); ctrl->reg_write(ctrl, SWRM_MCP_CFG_ADDR, val); - if (ctrl->version >= 0x01070000) { + if (ctrl->version >= SWRM_VERSION_1_7_0) { ctrl->reg_write(ctrl, SWRM_LINK_MANAGER_EE, SWRM_EE_CPU); ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL, SWRM_MCP_BUS_CLK_START << SWRM_EE_CPU); @@ -704,8 +706,7 @@ static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl) } /* Configure number of retries of a read/write cmd */ - if (ctrl->version >= 0x01050001) { - /* Only for versions >= 1.5.1 */ + if (ctrl->version >= SWRM_VERSION_1_5_1) { ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CFG_ADDR, SWRM_RD_WR_CMD_RETRIES | SWRM_CONTINUE_EXEC_ON_CMD_IGNORE); @@ -1239,7 +1240,7 @@ static int qcom_swrm_get_port_config(struct qcom_swrm_ctrl *ctrl) ret = of_property_read_u8_array(np, "qcom,ports-block-pack-mode", bp_mode, nports); if (ret) { - if (ctrl->version <= 0x01030000) + if (ctrl->version <= SWRM_VERSION_1_3_0) memset(bp_mode, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS); else return ret; @@ -1442,7 +1443,7 @@ static int qcom_swrm_probe(struct platform_device *pdev) pm_runtime_enable(dev); /* Clk stop is not supported on WSA Soundwire masters */ - if (ctrl->version <= 0x01030000) { + if (ctrl->version <= SWRM_VERSION_1_3_0) { ctrl->clock_stop_not_supported = true; } else { ctrl->reg_read(ctrl, SWRM_COMP_MASTER_ID, &val); @@ -1527,7 +1528,7 @@ static int __maybe_unused swrm_runtime_resume(struct device *dev) } else { reset_control_reset(ctrl->audio_cgcr); - if (ctrl->version >= 0x01070000) { + if (ctrl->version >= SWRM_VERSION_1_7_0) { ctrl->reg_write(ctrl, SWRM_LINK_MANAGER_EE, SWRM_EE_CPU); ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL, SWRM_MCP_BUS_CLK_START << SWRM_EE_CPU); From patchwork Wed Feb 22 14:44:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 60561 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp615569wrd; Wed, 22 Feb 2023 06:46:24 -0800 (PST) X-Google-Smtp-Source: AK7set9Ae59hUD/XazwWA5+vR6Z4s3Vq5j7vXqi5bXZ+YGyigiovF96M7h164xG14zCAZ1HH1Wop X-Received: by 2002:a17:907:9629:b0:870:baa6:6762 with SMTP id gb41-20020a170907962900b00870baa66762mr19177221ejc.14.1677077184234; Wed, 22 Feb 2023 06:46:24 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1677077184; cv=none; d=google.com; s=arc-20160816; b=HTwyHenGi+rzK0IspCY6VhuXjLrE+7GcZeVIMgdMhk2/ZTCrN8K8Hkabe9nyDJkKOk 7FtfWaX/9hsSC8MYuI7sWuaKFbc3RF7To/JbN1ne8Sat9eLcBjmKEAU1eDwcM+5i/BEC 5hsySmnNOQhJYG4qi6EeCxSwNKbBNkXr7ERUcxmEEXFnmZ1XWX1MrI3svUPbggCDvTcc fCKC7X4Z2WtwlTHUjk1MY6jsbUnlB3TP0K0NHBZuWlNFgCqWvDsNWX+axelPhvcb2e1Q XqKxlJelK//No+4xdiUZD0JT+0tFyTLu2HnuHR7dNWaBBM47kga/f4IPSGoQDSEsXrAk hYKA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=9dadzXX6cbudRfVYbEzwbLwspwzii5vVla/610fZmbs=; b=wCLFonVwHFVBEjylAzxlQPvIiAgf9VpQHjTycqnd+vARmq9+myWKyTvm8SmLJycQpj wPt73IS49bIUckXbCCSeewDr1v9w8Hy5eTvk0mch1bXifqi+fRtdHXiwcTui9UVc3iUP vOwUdttGT92tw3v/6BCdMsk+EHOdhL9OilmEGgT5SuwPRjj44MnXOiEESA7LR2zH0Mwb faQem5W0f2AHeDhDnl5j950/we+IAgB20FyStLsJ/wKAbWNa7aRMBqvQ2F35YbUPYGvx Gv70cnMmg96w+ZNsiVcgbu1sHzbrMapnr47KNGKnG8F7LET1NAwhLt/xEiBg6EXmEMzk t8iA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=hFa4NWrU; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from out1.vger.email (out1.vger.email. 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([178.197.216.144]) by smtp.gmail.com with ESMTPSA id o10-20020a1c750a000000b003e7c89b3514sm5059776wmc.23.2023.02.22.06.44.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Feb 2023 06:44:16 -0800 (PST) From: Krzysztof Kozlowski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Vinod Koul , Bard Liao , Pierre-Louis Bossart , Sanyog Kale , linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org Cc: Krzysztof Kozlowski Subject: [PATCH 2/2] soundwire: qcom: gracefully handle too many ports in DT Date: Wed, 22 Feb 2023 15:44:12 +0100 Message-Id: <20230222144412.237832-2-krzysztof.kozlowski@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230222144412.237832-1-krzysztof.kozlowski@linaro.org> References: <20230222144412.237832-1-krzysztof.kozlowski@linaro.org> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1758542885612895608?= X-GMAIL-MSGID: =?utf-8?q?1758542885612895608?= There are two issues related to the number of ports coming from Devicetree when exceeding in total QCOM_SDW_MAX_PORTS. Both lead to incorrect memory accesses: 1. With DTS having too big value of input or output ports, the driver, when copying port parameters from local/stack arrays into 'pconfig' array in 'struct qcom_swrm_ctrl', will iterate over their sizes. 2. If DTS also has too many parameters for these ports (e.g. qcom,ports-sinterval-low), the driver will overflow buffers on the stack when reading these properties from DTS. Add a sanity check so incorrect DTS will not cause kernel memory corruption. Signed-off-by: Krzysztof Kozlowski Reviewed-by: Konrad Dybcio Reviewed-by: Srinivas Kandagatla --- drivers/soundwire/qcom.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c index 79bebcecde6d..c296e0bf897b 100644 --- a/drivers/soundwire/qcom.c +++ b/drivers/soundwire/qcom.c @@ -1218,6 +1218,9 @@ static int qcom_swrm_get_port_config(struct qcom_swrm_ctrl *ctrl) ctrl->num_dout_ports = val; nports = ctrl->num_dout_ports + ctrl->num_din_ports; + if (nports > QCOM_SDW_MAX_PORTS) + return -EINVAL; + /* Valid port numbers are from 1-14, so mask out port 0 explicitly */ set_bit(0, &ctrl->dout_port_mask); set_bit(0, &ctrl->din_port_mask);