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Thu, 14 Sep 2023 05:44:11 GMT Received: from taozha-gv.qualcomm.com (10.80.80.8) by nalasex01c.na.qualcomm.com (10.47.97.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.30; Wed, 13 Sep 2023 22:44:06 -0700 From: Tao Zhang To: Mathieu Poirier , Suzuki K Poulose , Alexander Shishkin , Konrad Dybcio , Mike Leach , Rob Herring , Krzysztof Kozlowski CC: Tao Zhang , Jinlong Mao , Leo Yan , Greg Kroah-Hartman , , , , , Tingwei Zhang , Yuanfang Zhang , Trilok Soni , Hao Zhang , , Subject: [PATCH v9 04/13] coresight-tpda: Add DSB dataset support Date: Thu, 14 Sep 2023 13:43:15 +0800 Message-ID: <1694670204-11515-5-git-send-email-quic_taozha@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1694670204-11515-1-git-send-email-quic_taozha@quicinc.com> References: <1694670204-11515-1-git-send-email-quic_taozha@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01c.na.qualcomm.com (10.47.97.35) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: xhB_sZbFLvIQqwYPv5waJloSqxXYJjse X-Proofpoint-GUID: xhB_sZbFLvIQqwYPv5waJloSqxXYJjse X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.980,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-09-14_03,2023-09-13_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 lowpriorityscore=0 malwarescore=0 clxscore=1015 priorityscore=1501 adultscore=0 phishscore=0 suspectscore=0 mlxlogscore=999 bulkscore=0 spamscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2309140049 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230913_224420_017962_DF448CD3 X-CRM114-Status: GOOD ( 32.06 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Read the DSB element size from the device tree. Set the register bit that controls the DSB element size of the corresponding port. Signed-off-by: Tao Zhang --- drivers/hwtracing/coresight/coresight-tpda.c | 126 ++++++++++++++++++++++++--- drivers/hwtracing/coresight/coresight-tpda.h | 2 + 2 files changed, 118 insertions(+), 10 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtracing/coresight/coresight-tpda.c index 8d2b9d2..5f82737 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.c +++ b/drivers/hwtracing/coresight/coresight-tpda.c @@ -21,6 +21,80 @@ DEFINE_CORESIGHT_DEVLIST(tpda_devs, "tpda"); +static bool coresight_device_is_tpdm(struct coresight_device *csdev) +{ + return (csdev->type == CORESIGHT_DEV_TYPE_SOURCE) && + (csdev->subtype.source_subtype == + CORESIGHT_DEV_SUBTYPE_SOURCE_TPDM); +} + +/* + * Read the DSB element size from the TPDM device + * Returns + * The dsb element size read from the devicetree if available. + * 0 - Otherwise, with a warning once. + */ +static int tpdm_read_dsb_element_size(struct coresight_device *csdev) +{ + int rc = 0; + u8 size = 0; + + rc = fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), + "qcom,dsb-element-size", &size); + if (rc) + dev_warn_once(&csdev->dev, + "Failed to read TPDM DSB Element size: %d\n", rc); + + return size; +} + +/* + * Search and read element data size from the TPDM node in + * the devicetree. Each input port of TPDA is connected to + * a TPDM. Different TPDM supports different types of dataset, + * and some may support more than one type of dataset. + * Parameter "inport" is used to pass in the input port number + * of TPDA, and it is set to -1 in the recursize call. + */ +static int tpda_get_element_size(struct coresight_device *csdev, + int inport) +{ + int dsb_size = -ENOENT; + int i, size; + struct coresight_device *in; + + for (i = 0; i < csdev->pdata->nr_inconns; i++) { + in = csdev->pdata->in_conns[i]->src_dev; + if (!in) + continue; + + /* Ignore the paths that do not match port */ + if (inport > 0 && + csdev->pdata->in_conns[i]->dest_port != inport) + continue; + + if (coresight_device_is_tpdm(in)) { + size = tpdm_read_dsb_element_size(in); + } else { + /* Recurse down the path */ + size = tpda_get_element_size(in, -1); + } + + if (size < 0) + return size; + + if (dsb_size < 0) { + /* Found a size, save it. */ + dsb_size = size; + } else { + /* Found duplicate TPDMs */ + return -EEXIST; + } + } + + return dsb_size; +} + /* Settings pre enabling port control register */ static void tpda_enable_pre_port(struct tpda_drvdata *drvdata) { @@ -32,26 +106,55 @@ static void tpda_enable_pre_port(struct tpda_drvdata *drvdata) writel_relaxed(val, drvdata->base + TPDA_CR); } -static void tpda_enable_port(struct tpda_drvdata *drvdata, int port) +static int tpda_enable_port(struct tpda_drvdata *drvdata, int port) { u32 val; + int size; val = readl_relaxed(drvdata->base + TPDA_Pn_CR(port)); + /* + * Configure aggregator port n DSB data set element size + * Set the bit to 0 if the size is 32 + * Set the bit to 1 if the size is 64 + */ + size = tpda_get_element_size(drvdata->csdev, port); + switch (size) { + case 32: + val &= ~TPDA_Pn_CR_DSBSIZE; + break; + case 64: + val |= TPDA_Pn_CR_DSBSIZE; + break; + case 0: + return -EEXIST; + case -EEXIST: + dev_warn_once(&drvdata->csdev->dev, + "Detected multiple TPDMs on port %d", -EEXIST); + return -EEXIST; + default: + return -EINVAL; + } + /* Enable the port */ val |= TPDA_Pn_CR_ENA; writel_relaxed(val, drvdata->base + TPDA_Pn_CR(port)); + + return 0; } -static void __tpda_enable(struct tpda_drvdata *drvdata, int port) +static int __tpda_enable(struct tpda_drvdata *drvdata, int port) { + int ret; + CS_UNLOCK(drvdata->base); if (!drvdata->csdev->enable) tpda_enable_pre_port(drvdata); - tpda_enable_port(drvdata, port); - + ret = tpda_enable_port(drvdata, port); CS_LOCK(drvdata->base); + + return ret; } static int tpda_enable(struct coresight_device *csdev, @@ -59,16 +162,19 @@ static int tpda_enable(struct coresight_device *csdev, struct coresight_connection *out) { struct tpda_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); + int ret = 0; spin_lock(&drvdata->spinlock); - if (atomic_read(&in->dest_refcnt) == 0) - __tpda_enable(drvdata, in->dest_port); + if (atomic_read(&in->dest_refcnt) == 0) { + ret = __tpda_enable(drvdata, in->dest_port); + if (!ret) { + atomic_inc(&in->dest_refcnt); + dev_dbg(drvdata->dev, "TPDA inport %d enabled.\n", in->dest_port); + } + } - atomic_inc(&in->dest_refcnt); spin_unlock(&drvdata->spinlock); - - dev_dbg(drvdata->dev, "TPDA inport %d enabled.\n", in->dest_port); - return 0; + return ret; } static void __tpda_disable(struct tpda_drvdata *drvdata, int port) diff --git a/drivers/hwtracing/coresight/coresight-tpda.h b/drivers/hwtracing/coresight/coresight-tpda.h index 0399678..b3b38fd 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.h +++ b/drivers/hwtracing/coresight/coresight-tpda.h @@ -10,6 +10,8 @@ #define TPDA_Pn_CR(n) (0x004 + (n * 4)) /* Aggregator port enable bit */ #define TPDA_Pn_CR_ENA BIT(0) +/* Aggregator port DSB data set element size bit */ +#define TPDA_Pn_CR_DSBSIZE BIT(8) #define TPDA_MAX_INPORTS 32