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coresight-tpda: Add support to configure CMB element
Read the CMB element size from the device tree. Set the register bit that controls the CMB element size of the corresponding port. Reviewed-by: James Clark <james.clark@arm.com> Signed-off-by: Tao Zhang <quic_taozha@quicinc.com> Signed-off-by: Mao Jinlong <quic_jinlmao@quicinc.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Link: https://lore.kernel.org/r/1707024641-22460-6-git-send-email-quic_taozha@quicinc.com
This commit is contained in:
Tao Zhang
Suzuki K Poulose
parent
a1705ffcce
commit
e6d7f5252f
2 changed files with 84 additions and 58 deletions
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@ -18,6 +18,7 @@
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#include "coresight-priv.h"
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#include "coresight-tpda.h"
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#include "coresight-trace-id.h"
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#include "coresight-tpdm.h"
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DEFINE_CORESIGHT_DEVLIST(tpda_devs, "tpda");
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@ -28,24 +29,59 @@ static bool coresight_device_is_tpdm(struct coresight_device *csdev)
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CORESIGHT_DEV_SUBTYPE_SOURCE_TPDM);
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}
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/*
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* Read the DSB element size from the TPDM device
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* Returns
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* The dsb element size read from the devicetree if available.
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* 0 - Otherwise, with a warning once.
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*/
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static int tpdm_read_dsb_element_size(struct coresight_device *csdev)
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static void tpda_clear_element_size(struct coresight_device *csdev)
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{
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int rc = 0;
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u8 size = 0;
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struct tpda_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
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drvdata->dsb_esize = 0;
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drvdata->cmb_esize = 0;
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}
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static void tpda_set_element_size(struct tpda_drvdata *drvdata, u32 *val)
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{
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/* Clear all relevant fields */
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*val &= ~(TPDA_Pn_CR_DSBSIZE | TPDA_Pn_CR_CMBSIZE);
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if (drvdata->dsb_esize == 64)
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*val |= TPDA_Pn_CR_DSBSIZE;
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else if (drvdata->dsb_esize == 32)
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*val &= ~TPDA_Pn_CR_DSBSIZE;
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if (drvdata->cmb_esize == 64)
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*val |= FIELD_PREP(TPDA_Pn_CR_CMBSIZE, 0x2);
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else if (drvdata->cmb_esize == 32)
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*val |= FIELD_PREP(TPDA_Pn_CR_CMBSIZE, 0x1);
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else if (drvdata->cmb_esize == 8)
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*val &= ~TPDA_Pn_CR_CMBSIZE;
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}
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/*
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* Read the element size from the TPDM device. One TPDM must have at least one of the
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* element size property.
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* Returns
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* 0 - The element size property is read
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* Others - Cannot read the property of the element size
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*/
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static int tpdm_read_element_size(struct tpda_drvdata *drvdata,
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struct coresight_device *csdev)
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{
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int rc = -EINVAL;
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struct tpdm_drvdata *tpdm_data = dev_get_drvdata(csdev->dev.parent);
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if (tpdm_has_dsb_dataset(tpdm_data)) {
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rc = fwnode_property_read_u8(dev_fwnode(csdev->dev.parent),
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"qcom,dsb-element-size", &drvdata->dsb_esize);
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}
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if (tpdm_has_cmb_dataset(tpdm_data)) {
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rc = fwnode_property_read_u32(dev_fwnode(csdev->dev.parent),
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"qcom,cmb-element-bits", &drvdata->cmb_esize);
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}
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rc = fwnode_property_read_u8(dev_fwnode(csdev->dev.parent),
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"qcom,dsb-element-size", &size);
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if (rc)
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dev_warn_once(&csdev->dev,
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"Failed to read TPDM DSB Element size: %d\n", rc);
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"Failed to read TPDM Element size: %d\n", rc);
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return size;
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return rc;
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}
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/*
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@ -56,11 +92,12 @@ static int tpdm_read_dsb_element_size(struct coresight_device *csdev)
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* Parameter "inport" is used to pass in the input port number
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* of TPDA, and it is set to -1 in the recursize call.
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*/
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static int tpda_get_element_size(struct coresight_device *csdev,
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static int tpda_get_element_size(struct tpda_drvdata *drvdata,
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struct coresight_device *csdev,
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int inport)
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{
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int dsb_size = -ENOENT;
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int i, size;
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int rc = 0;
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int i;
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struct coresight_device *in;
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for (i = 0; i < csdev->pdata->nr_inconns; i++) {
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@ -69,30 +106,26 @@ static int tpda_get_element_size(struct coresight_device *csdev,
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continue;
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/* Ignore the paths that do not match port */
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if (inport > 0 &&
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if (inport >= 0 &&
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csdev->pdata->in_conns[i]->dest_port != inport)
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continue;
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if (coresight_device_is_tpdm(in)) {
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size = tpdm_read_dsb_element_size(in);
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if (drvdata->dsb_esize || drvdata->cmb_esize)
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return -EEXIST;
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rc = tpdm_read_element_size(drvdata, in);
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if (rc)
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return rc;
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} else {
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/* Recurse down the path */
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size = tpda_get_element_size(in, -1);
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}
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if (size < 0)
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return size;
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if (dsb_size < 0) {
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/* Found a size, save it. */
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dsb_size = size;
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} else {
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/* Found duplicate TPDMs */
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return -EEXIST;
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rc = tpda_get_element_size(drvdata, in, -1);
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if (rc)
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return rc;
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}
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}
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return dsb_size;
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return rc;
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}
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/* Settings pre enabling port control register */
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@ -109,37 +142,24 @@ static void tpda_enable_pre_port(struct tpda_drvdata *drvdata)
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static int tpda_enable_port(struct tpda_drvdata *drvdata, int port)
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{
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u32 val;
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int size;
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int rc;
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val = readl_relaxed(drvdata->base + TPDA_Pn_CR(port));
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/*
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* Configure aggregator port n DSB data set element size
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* Set the bit to 0 if the size is 32
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* Set the bit to 1 if the size is 64
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*/
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size = tpda_get_element_size(drvdata->csdev, port);
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switch (size) {
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case 32:
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val &= ~TPDA_Pn_CR_DSBSIZE;
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break;
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case 64:
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val |= TPDA_Pn_CR_DSBSIZE;
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break;
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case 0:
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return -EEXIST;
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case -EEXIST:
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tpda_clear_element_size(drvdata->csdev);
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rc = tpda_get_element_size(drvdata, drvdata->csdev, port);
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if (!rc && (drvdata->dsb_esize || drvdata->cmb_esize)) {
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tpda_set_element_size(drvdata, &val);
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/* Enable the port */
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val |= TPDA_Pn_CR_ENA;
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writel_relaxed(val, drvdata->base + TPDA_Pn_CR(port));
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} else if (rc == -EEXIST)
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dev_warn_once(&drvdata->csdev->dev,
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"Detected multiple TPDMs on port %d", -EEXIST);
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return -EEXIST;
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default:
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return -EINVAL;
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}
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"Detected multiple TPDMs on port %d", port);
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else
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dev_warn_once(&drvdata->csdev->dev,
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"Didn't find TPDM element size");
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/* Enable the port */
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val |= TPDA_Pn_CR_ENA;
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writel_relaxed(val, drvdata->base + TPDA_Pn_CR(port));
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return 0;
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return rc;
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}
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static int __tpda_enable(struct tpda_drvdata *drvdata, int port)
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@ -10,6 +10,8 @@
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#define TPDA_Pn_CR(n) (0x004 + (n * 4))
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/* Aggregator port enable bit */
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#define TPDA_Pn_CR_ENA BIT(0)
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/* Aggregator port CMB data set element size bit */
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#define TPDA_Pn_CR_CMBSIZE GENMASK(7, 6)
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/* Aggregator port DSB data set element size bit */
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#define TPDA_Pn_CR_DSBSIZE BIT(8)
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@ -25,6 +27,8 @@
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* @csdev: component vitals needed by the framework.
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* @spinlock: lock for the drvdata value.
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* @enable: enable status of the component.
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* @dsb_esize Record the DSB element size.
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* @cmb_esize Record the CMB element size.
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*/
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struct tpda_drvdata {
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void __iomem *base;
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@ -32,6 +36,8 @@ struct tpda_drvdata {
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struct coresight_device *csdev;
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spinlock_t spinlock;
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u8 atid;
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u8 dsb_esize;
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u32 cmb_esize;
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};
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#endif /* _CORESIGHT_CORESIGHT_TPDA_H */
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