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Thu, 23 Mar 2023 06:05:10 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 15.2.986.41; Wed, 22 Mar 2023 23:05:05 -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 v3 07/11] coresight-tpdm: Add nodes for dsb edge control Date: Thu, 23 Mar 2023 14:04:04 +0800 Message-ID: <1679551448-19160-8-git-send-email-quic_taozha@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1679551448-19160-1-git-send-email-quic_taozha@quicinc.com> References: <1679551448-19160-1-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-GUID: kut6Z0yQNBVba_NXshYsKSSmevGB43vf X-Proofpoint-ORIG-GUID: kut6Z0yQNBVba_NXshYsKSSmevGB43vf X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-03-22_21,2023-03-22_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 mlxlogscore=999 bulkscore=0 priorityscore=1501 mlxscore=0 malwarescore=0 clxscore=1015 suspectscore=0 adultscore=0 impostorscore=0 phishscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303150002 definitions=main-2303230046 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230322_230548_099400_E70D2CE8 X-CRM114-Status: GOOD ( 26.02 ) 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 Add the nodes to set value for DSB edge control and DSB edge control mask. Each DSB subunit TPDM has maximum of n(n<16) EDCR resgisters to configure edge control. DSB edge detection control 00: Rising edge detection 01: Falling edge detection 10: Rising and falling edge detection (toggle detection) And each DSB subunit TPDM has maximum of m(m<8) ECDMR registers to configure mask. Eight 32 bit registers providing DSB interface edge detection mask control. Signed-off-by: Tao Zhang --- .../ABI/testing/sysfs-bus-coresight-devices-tpdm | 26 ++++ drivers/hwtracing/coresight/coresight-tpdm.c | 142 ++++++++++++++++++++- drivers/hwtracing/coresight/coresight-tpdm.h | 14 ++ 3 files changed, 181 insertions(+), 1 deletion(-) diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm index f13e282..094d624 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm @@ -45,3 +45,29 @@ Description: tpdm. Accepts the value needs to be greater than 0. + +What: /sys/bus/coresight/devices//dsb_edge_ctrl +Date: March 2023 +KernelVersion 6.3 +Contact: Jinlong Mao (QUIC) , Tao Zhang (QUIC) +Description: + (Write) Set the edge control of DSB tpdm. Read the + edge control of DSB tpdm. + + Accepts the following three values. + value 1: Start EDCR register number + value 2: End EDCR register number + value 3: The value need to be written + +What: /sys/bus/coresight/devices//dsb_edge_ctrl_mask +Date: March 2023 +KernelVersion 6.3 +Contact: Jinlong Mao (QUIC) , Tao Zhang (QUIC) +Description: + (Write) Set the edge control mask of DSB tpdm. Read + the edge control mask of DSB tpdm. + + Accepts the following three values. + value 1: Start EDCMR register number + value 2: End EDCMR register number + value 3: The value need to be written diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c index 8cd822f..2a0b36c 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.c +++ b/drivers/hwtracing/coresight/coresight-tpdm.c @@ -88,7 +88,14 @@ static void set_trigger_type(struct tpdm_drvdata *drvdata, u32 *val) static void tpdm_enable_dsb(struct tpdm_drvdata *drvdata) { - u32 val; + u32 val, i; + + for (i = 0; i < TPDM_DSB_MAX_EDCR; i++) + writel_relaxed(drvdata->dsb->edge_ctrl[i], + drvdata->base + TPDM_DSB_EDCR(i)); + for (i = 0; i < TPDM_DSB_MAX_EDCMR; i++) + writel_relaxed(drvdata->dsb->edge_ctrl_mask[i], + drvdata->base + TPDM_DSB_EDCMR(i)); val = readl_relaxed(drvdata->base + TPDM_DSB_TIER); /* Set trigger timestamp */ @@ -311,6 +318,137 @@ static ssize_t dsb_mode_store(struct device *dev, } static DEVICE_ATTR_RW(dsb_mode); +static ssize_t dsb_edge_ctrl_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + ssize_t size = 0; + int i; + + spin_lock(&drvdata->spinlock); + for (i = 0; i < TPDM_DSB_MAX_EDCR; i++) { + size += sysfs_emit_at(buf, size, + "Index:0x%x Val:0x%x\n", i, + drvdata->dsb->edge_ctrl[i]); + } + spin_unlock(&drvdata->spinlock); + return size; +} + +/* + * value 1: Start EDCR register number + * value 2: End EDCR register number + * value 3: The value need to be written + * The EDCR registers can include up to 16 32-bit registers, and each + * one can be configured to control up to 16 edge detections(2 bits + * control one edge detection). So a total 256 edge detections can be + * configured. So the starting number(value 1) and ending number(value 2) + * cannot be greater than 256, and value 1 should be less than value 2. + * The following values are the rage of value 3. + * 0 - Rising edge detection + * 1 - Falling edge detection + * 2 - Rising and falling edge detection (toggle detection) + */ +static ssize_t dsb_edge_ctrl_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + unsigned long start, end, edge_ctrl; + uint32_t val; + int i, index, bit, reg; + + if (sscanf(buf, "%lx %lx %lx", &start, &end, &edge_ctrl) != 3) + return -EINVAL; + if ((start >= TPDM_DSB_MAX_LINES) || (end >= TPDM_DSB_MAX_LINES) || + edge_ctrl > 0x2) + return -EPERM; + + spin_lock(&drvdata->spinlock); + for (i = start; i <= end; i++) { + /* + * The 32-bit register has 32 bits(NUM_OF_BITS). + * Each one register can be configured to control 16 + * (NUM_OF_BITS / 2) edge detectioins. + */ + reg = i / (NUM_OF_BITS / 2); + index = i % (NUM_OF_BITS / 2); + bit = index * 2; + + val = drvdata->dsb->edge_ctrl[reg]; + val &= ~GENMASK((bit + 1), bit); + val |= (edge_ctrl << bit); + drvdata->dsb->edge_ctrl[reg] = val; + } + spin_unlock(&drvdata->spinlock); + + return size; +} +static DEVICE_ATTR_RW(dsb_edge_ctrl); + +static ssize_t dsb_edge_ctrl_mask_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + ssize_t size = 0; + int i; + + spin_lock(&drvdata->spinlock); + for (i = 0; i < TPDM_DSB_MAX_EDCR / 2; i++) { + size += sysfs_emit_at(buf, size, + "Index:0x%x Val:0x%x\n", i, + drvdata->dsb->edge_ctrl_mask[i]); + } + spin_unlock(&drvdata->spinlock); + return size; +} + +/* + * value 1: Start EDCMR register number + * value 2: End EDCMR register number + * value 3: The value need to be written + */ +static ssize_t dsb_edge_ctrl_mask_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + unsigned long start, end, val; + u32 set; + int i, index, reg; + + if (sscanf(buf, "%lx %lx %lx", &start, &end, &val) != 3) + return -EINVAL; + if ((start >= TPDM_DSB_MAX_LINES) || (end >= TPDM_DSB_MAX_LINES) + || (val & ~1UL)) + return -EPERM; + + spin_lock(&drvdata->spinlock); + for (i = start; i <= end; i++) { + /* + * The 32-bit register has 32 bits(NUM_OF_BITS). + * Each one register can be configured to control 32 + * (NUM_OF_BITS) edge detectioin masks. + */ + reg = i / NUM_OF_BITS; + index = (i % NUM_OF_BITS); + + set = drvdata->dsb->edge_ctrl_mask[reg]; + if (val) + set |= BIT(index); + else + set &= ~BIT(index); + drvdata->dsb->edge_ctrl_mask[reg] = set; + } + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(dsb_edge_ctrl_mask); + static ssize_t dsb_trig_type_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -383,6 +521,8 @@ static DEVICE_ATTR_RW(dsb_trig_ts); static struct attribute *tpdm_dsb_attrs[] = { &dev_attr_dsb_mode.attr, + &dev_attr_dsb_edge_ctrl.attr, + &dev_attr_dsb_edge_ctrl_mask.attr, &dev_attr_dsb_trig_ts.attr, &dev_attr_dsb_trig_type.attr, NULL, diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h b/drivers/hwtracing/coresight/coresight-tpdm.h index 8fee562..342ef23 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.h +++ b/drivers/hwtracing/coresight/coresight-tpdm.h @@ -12,6 +12,8 @@ /* DSB Subunit Registers */ #define TPDM_DSB_CR (0x780) #define TPDM_DSB_TIER (0x784) +#define TPDM_DSB_EDCR(n) (0x808 + (n * 4)) +#define TPDM_DSB_EDCMR(n) (0x848 + (n * 4)) /* Enable bit for DSB subunit */ #define TPDM_DSB_CR_ENA BIT(0) @@ -31,6 +33,8 @@ #define TPDM_DSB_TEST_MODE GENMASK(11, 9) #define TPDM_DSB_HPSEL GENMASK(6, 2) +#define NUM_OF_BITS 32 + /* TPDM integration test registers */ #define TPDM_ITATBCNTRL (0xEF0) #define TPDM_ITCNTRL (0xF00) @@ -57,14 +61,24 @@ #define TPDM_PIDR0_DS_IMPDEF BIT(0) #define TPDM_PIDR0_DS_DSB BIT(1) +#define TPDM_DSB_MAX_LINES 256 +/* MAX number of EDCR registers */ +#define TPDM_DSB_MAX_EDCR 16 +/* MAX number of EDCMR registers */ +#define TPDM_DSB_MAX_EDCMR 8 + /** * struct dsb_dataset - specifics associated to dsb dataset * @mode: DSB programming mode + * @edge_ctrl: Save value for edge control + * @edge_ctrl_mask: Save value for edge control mask * @trig_ts: Enable/Disable trigger timestamp. * @trig_type: Enable/Disable trigger type. */ struct dsb_dataset { u32 mode; + u32 edge_ctrl[TPDM_DSB_MAX_EDCR]; + u32 edge_ctrl_mask[TPDM_DSB_MAX_EDCMR]; bool trig_ts; bool trig_type; };