Messages in this thread | | | Date | Fri, 2 Feb 2024 10:06:23 +0000 | Subject | Re: [PATCH v6 05/10] coresight-tpda: Add support to configure CMB element | From | Suzuki K Poulose <> |
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On 02/02/2024 09:45, Suzuki K Poulose wrote: > On 02/02/2024 09:32, Tao Zhang wrote: >> 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> >> --- >> drivers/hwtracing/coresight/coresight-tpda.c | 125 +++++++++++-------- >> drivers/hwtracing/coresight/coresight-tpda.h | 6 + >> 2 files changed, 81 insertions(+), 50 deletions(-) >> >> diff --git a/drivers/hwtracing/coresight/coresight-tpda.c >> b/drivers/hwtracing/coresight/coresight-tpda.c >> index 4ac954f4bc13..27d567f4c8bf 100644 >> --- a/drivers/hwtracing/coresight/coresight-tpda.c >> +++ b/drivers/hwtracing/coresight/coresight-tpda.c >> @@ -18,6 +18,7 @@ >> #include "coresight-priv.h" >> #include "coresight-tpda.h" >> #include "coresight-trace-id.h" >> +#include "coresight-tpdm.h" >> DEFINE_CORESIGHT_DEVLIST(tpda_devs, "tpda"); >> @@ -28,24 +29,59 @@ static bool coresight_device_is_tpdm(struct >> coresight_device *csdev) >> CORESIGHT_DEV_SUBTYPE_SOURCE_TPDM); >> } >> +static void tpdm_clear_element_size(struct coresight_device *csdev) > > I just noticed this anomaly. This is supposed to be : > > tpda_clear_element_size() ? I can fix it up locally. > > > Suzuki > > >> +{ >> + struct tpda_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); >> + >> + drvdata->dsb_esize = 0; >> + drvdata->cmb_esize = 0; >> +} >> + >> +static void tpda_set_element_size(struct tpda_drvdata *drvdata, u32 >> *val) >> +{ >> + /* Clear all relevant fields */ >> + *val &= ~(TPDA_Pn_CR_DSBSIZE | TPDA_Pn_CR_CMBSIZE); >> + >> + if (drvdata->dsb_esize == 64) >> + *val |= TPDA_Pn_CR_DSBSIZE; >> + else if (drvdata->dsb_esize == 32) >> + *val &= ~TPDA_Pn_CR_DSBSIZE; >> + >> + if (drvdata->cmb_esize == 64) >> + *val |= FIELD_PREP(TPDA_Pn_CR_CMBSIZE, 0x2); >> + else if (drvdata->cmb_esize == 32) >> + *val |= FIELD_PREP(TPDA_Pn_CR_CMBSIZE, 0x1); >> + else if (drvdata->cmb_esize == 8) >> + *val &= ~TPDA_Pn_CR_CMBSIZE; >> +} >> + >> /* >> - * Read the DSB element size from the TPDM device >> + * Read the element size from the TPDM device. One TPDM must have at >> least one of the >> + * element size property. >> * Returns >> - * The dsb element size read from the devicetree if available. >> - * 0 - Otherwise, with a warning once. >> + * 0 - The element size property is read >> + * Others - Cannot read the property of the element size >> */ >> -static int tpdm_read_dsb_element_size(struct coresight_device *csdev) >> +static int tpdm_read_element_size(struct tpda_drvdata *drvdata, >> + struct coresight_device *csdev) >> { >> - int rc = 0; >> - u8 size = 0; >> + int rc = -EINVAL; >> + struct tpdm_drvdata *tpdm_data = dev_get_drvdata(csdev->dev.parent); >> + >> + if (tpdm_has_dsb_dataset(tpdm_data)) { >> + rc = fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), >> + "qcom,dsb-element-size", &drvdata->dsb_esize); >> + } >> + if (tpdm_has_cmb_dataset(tpdm_data)) { >> + rc = fwnode_property_read_u32(dev_fwnode(csdev->dev.parent), >> + "qcom,cmb-element-bits", &drvdata->cmb_esize); >> + } >> - 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); >> + "Failed to read TPDM Element size: %d\n", rc); >> - return size; >> + return rc; >> } >> /* >> @@ -56,11 +92,12 @@ static int tpdm_read_dsb_element_size(struct >> coresight_device *csdev) >> * 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, >> +static int tpda_get_element_size(struct tpda_drvdata *drvdata, >> + struct coresight_device *csdev, >> int inport) >> { >> - int dsb_size = -ENOENT; >> - int i, size; >> + int rc = 0; >> + int i; >> struct coresight_device *in; >> for (i = 0; i < csdev->pdata->nr_inconns; i++) { >> @@ -69,30 +106,26 @@ static int tpda_get_element_size(struct >> coresight_device *csdev, >> continue; >> /* Ignore the paths that do not match port */ >> - if (inport > 0 && >> + 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); >> + if (drvdata->dsb_esize || drvdata->cmb_esize) >> + return -EEXIST; >> + rc = tpdm_read_element_size(drvdata, in); >> + if (rc) >> + return rc; >> } 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; >> + rc = tpda_get_element_size(drvdata, in, -1); >> + if (rc) >> + return rc; >> } >> } >> - return dsb_size; >> + >> + return rc; >> } >> /* Settings pre enabling port control register */ >> @@ -109,7 +142,7 @@ static void tpda_enable_pre_port(struct >> tpda_drvdata *drvdata) >> static int tpda_enable_port(struct tpda_drvdata *drvdata, int port) >> { >> u32 val; >> - int size; >> + int rc; >> val = readl_relaxed(drvdata->base + TPDA_Pn_CR(port)); >> /* >> @@ -117,29 +150,21 @@ static int tpda_enable_port(struct tpda_drvdata >> *drvdata, int port) >> * Set the bit to 0 if the size is 32 >> * Set the bit to 1 if the size is 64 >> */
The comment above is stale, you need to remove it. I noticed it after I applied the series for my build tests.
Please could you respin the series with the two issues above fixed ?
Suzuki
>> - 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: >> + tpdm_clear_element_size(drvdata->csdev); >> + rc = tpda_get_element_size(drvdata, drvdata->csdev, port); >> + if (!rc && (drvdata->dsb_esize || drvdata->cmb_esize)) { >> + tpda_set_element_size(drvdata, &val); >> + /* Enable the port */ >> + val |= TPDA_Pn_CR_ENA; >> + writel_relaxed(val, drvdata->base + TPDA_Pn_CR(port)); >> + } else if (rc == -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)); >> + "Detected multiple TPDMs on port %d", port); >> + else >> + dev_warn_once(&drvdata->csdev->dev, >> + "Didn't find TPDM element size"); >> - return 0; >> + return rc; >> } >> static int __tpda_enable(struct tpda_drvdata *drvdata, int port) >> diff --git a/drivers/hwtracing/coresight/coresight-tpda.h >> b/drivers/hwtracing/coresight/coresight-tpda.h >> index b3b38fd41b64..19af64120fcf 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 CMB data set element size bit */ >> +#define TPDA_Pn_CR_CMBSIZE GENMASK(7, 6) >> /* Aggregator port DSB data set element size bit */ >> #define TPDA_Pn_CR_DSBSIZE BIT(8) >> @@ -25,6 +27,8 @@ >> * @csdev: component vitals needed by the framework. >> * @spinlock: lock for the drvdata value. >> * @enable: enable status of the component. >> + * @dsb_esize Record the DSB element size. >> + * @cmb_esize Record the CMB element size. >> */ >> struct tpda_drvdata { >> void __iomem *base; >> @@ -32,6 +36,8 @@ struct tpda_drvdata { >> struct coresight_device *csdev; >> spinlock_t spinlock; >> u8 atid; >> + u8 dsb_esize; >> + u32 cmb_esize; >> }; >> #endif /* _CORESIGHT_CORESIGHT_TPDA_H */ >
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