| Message ID | 1700533494-19276-3-git-send-email-quic_taozha@quicinc.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v3,1/8] dt-bindings: arm: Add support for CMB element size | expand |
On 21/11/2023 02:24, 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. > > Signed-off-by: Tao Zhang <quic_taozha@quicinc.com> > Signed-off-by: Mao Jinlong <quic_jinlmao@quicinc.com> Reviewed-by: James Clark <james.clark@arm.com> > --- > drivers/hwtracing/coresight/coresight-tpda.c | 117 +++++++++++-------- > drivers/hwtracing/coresight/coresight-tpda.h | 6 + > 2 files changed, 74 insertions(+), 49 deletions(-) > > diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtracing/coresight/coresight-tpda.c > index 5f82737c37bb..e3762f38abb3 100644 > --- a/drivers/hwtracing/coresight/coresight-tpda.c > +++ b/drivers/hwtracing/coresight/coresight-tpda.c > @@ -28,24 +28,54 @@ 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) > +{ > + struct tpda_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); > + > + if (drvdata->dsb_esize) > + drvdata->dsb_esize = 0; > + if (drvdata->cmb_esize) > + drvdata->cmb_esize = 0; > +} > + > +static void tpda_set_element_size(struct tpda_drvdata *drvdata, u32 *val) > +{ > + > + 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 > * Returns > - * The dsb element size read from the devicetree if available. > + * The 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) > +static int tpdm_read_element_size(struct tpda_drvdata *drvdata, > + 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); > + int rc = -EINVAL; > + > + if (!fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), > + "qcom,dsb-element-size", &drvdata->dsb_esize)) > + rc = 0; > + if (!fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), > + "qcom,cmb-element-size", &drvdata->cmb_esize)) > + rc = 0; > 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 +86,12 @@ 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++) { > @@ -74,25 +105,21 @@ static int tpda_get_element_size(struct coresight_device *csdev, > 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 +136,7 @@ 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 +144,21 @@ 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 > */ > - 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", -EEXIST); > + else > + dev_warn_once(&drvdata->csdev->dev, > + "Didn't find TPDM elem 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..29164fd9711f 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; > + u8 cmb_esize; > }; > > #endif /* _CORESIGHT_CORESIGHT_TPDA_H */
On 21/11/2023 02:24, 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. > > Signed-off-by: Tao Zhang <quic_taozha@quicinc.com> > Signed-off-by: Mao Jinlong <quic_jinlmao@quicinc.com> > --- > drivers/hwtracing/coresight/coresight-tpda.c | 117 +++++++++++-------- > drivers/hwtracing/coresight/coresight-tpda.h | 6 + > 2 files changed, 74 insertions(+), 49 deletions(-) > > diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtracing/coresight/coresight-tpda.c > index 5f82737c37bb..e3762f38abb3 100644 > --- a/drivers/hwtracing/coresight/coresight-tpda.c > +++ b/drivers/hwtracing/coresight/coresight-tpda.c > @@ -28,24 +28,54 @@ 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) > +{ > + struct tpda_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); > + > + if (drvdata->dsb_esize) > + drvdata->dsb_esize = 0; > + if (drvdata->cmb_esize) > + drvdata->cmb_esize = 0; Why do we need the if (...) check here ? > +} > + > +static void tpda_set_element_size(struct tpda_drvdata *drvdata, u32 *val) > +{ > + > + 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 > * Returns > - * The dsb element size read from the devicetree if available. > + * The element size read from the devicetree if available. > * 0 - Otherwise, with a warning once. This doesn't match the function ? It return 0 on success and error (-EINVAL) on failure ? > */ > -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; > - > - rc = fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), > - "qcom,dsb-element-size", &size); > + int rc = -EINVAL; > + > + if (!fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), > + "qcom,dsb-element-size", &drvdata->dsb_esize)) > + rc = 0; > + if (!fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), > + "qcom,cmb-element-size", &drvdata->cmb_esize)) > + rc = 0; Are we not silently resetting the error if the former failed ? Could we not : rc |= fwnode_... rc |= fwnode_... instead ? Also what is the expectation here ? Are these properties a MUST for TPDM ? > 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 +86,12 @@ 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++) { > @@ -74,25 +105,21 @@ static int tpda_get_element_size(struct coresight_device *csdev, > 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 +136,7 @@ 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 +144,21 @@ 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 > */ > - 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", -EEXIST); > + else > + dev_warn_once(&drvdata->csdev->dev, > + "Didn't find TPDM elem size"); "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..29164fd9711f 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; > + u8 cmb_esize; > }; > > #endif /* _CORESIGHT_CORESIGHT_TPDA_H */ Suzuki
On 12/18/2023 6:27 PM, Suzuki K Poulose wrote: > On 21/11/2023 02:24, 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. >> >> Signed-off-by: Tao Zhang <quic_taozha@quicinc.com> >> Signed-off-by: Mao Jinlong <quic_jinlmao@quicinc.com> >> --- >> drivers/hwtracing/coresight/coresight-tpda.c | 117 +++++++++++-------- >> drivers/hwtracing/coresight/coresight-tpda.h | 6 + >> 2 files changed, 74 insertions(+), 49 deletions(-) >> >> diff --git a/drivers/hwtracing/coresight/coresight-tpda.c >> b/drivers/hwtracing/coresight/coresight-tpda.c >> index 5f82737c37bb..e3762f38abb3 100644 >> --- a/drivers/hwtracing/coresight/coresight-tpda.c >> +++ b/drivers/hwtracing/coresight/coresight-tpda.c >> @@ -28,24 +28,54 @@ 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) >> +{ >> + struct tpda_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); >> + >> + if (drvdata->dsb_esize) >> + drvdata->dsb_esize = 0; >> + if (drvdata->cmb_esize) >> + drvdata->cmb_esize = 0; > > Why do we need the if (...) check here ? The element size of all the TPDM sub-unit should be set to 0 here. I will update this in the next patch series. > >> +} >> + >> +static void tpda_set_element_size(struct tpda_drvdata *drvdata, u32 >> *val) >> +{ >> + >> + 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 >> * Returns >> - * The dsb element size read from the devicetree if available. >> + * The element size read from the devicetree if available. >> * 0 - Otherwise, with a warning once. > > This doesn't match the function ? It return 0 on success and > error (-EINVAL) on failure ? 0 means the element size property is found from the devicetree. Otherwise, it will return error(-EINVAL). I will update this in the next patch series. > >> */ >> -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; >> - >> - rc = fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), >> - "qcom,dsb-element-size", &size); >> + int rc = -EINVAL; >> + >> + if (!fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), >> + "qcom,dsb-element-size", &drvdata->dsb_esize)) >> + rc = 0; >> + if (!fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), >> + "qcom,cmb-element-size", &drvdata->cmb_esize)) >> + rc = 0; > > Are we not silently resetting the error if the former failed ? > > Could we not : > > rc |= fwnode_... > > rc |= fwnode_... > > instead ? > > Also what is the expectation here ? Are these properties a MUST for > TPDM ? The TPDM must have one of the element size property. As long as one can be found, this TPDM configuration can be considered valid. So this function will return 0 if one of the element size property is found. Best, Tao > >> 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 +86,12 @@ 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++) { >> @@ -74,25 +105,21 @@ static int tpda_get_element_size(struct >> coresight_device *csdev, >> 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 +136,7 @@ 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 +144,21 @@ 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 >> */ >> - 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", -EEXIST); >> + else >> + dev_warn_once(&drvdata->csdev->dev, >> + "Didn't find TPDM elem size"); > > "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..29164fd9711f 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; >> + u8 cmb_esize; >> }; >> #endif /* _CORESIGHT_CORESIGHT_TPDA_H */ > > Suzuki > >
On 19/12/2023 02:13, Tao Zhang wrote: > > On 12/18/2023 6:27 PM, Suzuki K Poulose wrote: >> On 21/11/2023 02:24, 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. >>> >>> Signed-off-by: Tao Zhang <quic_taozha@quicinc.com> >>> Signed-off-by: Mao Jinlong <quic_jinlmao@quicinc.com> >>> --- >>> drivers/hwtracing/coresight/coresight-tpda.c | 117 +++++++++++-------- >>> drivers/hwtracing/coresight/coresight-tpda.h | 6 + >>> 2 files changed, 74 insertions(+), 49 deletions(-) >>> >>> diff --git a/drivers/hwtracing/coresight/coresight-tpda.c >>> b/drivers/hwtracing/coresight/coresight-tpda.c >>> index 5f82737c37bb..e3762f38abb3 100644 >>> --- a/drivers/hwtracing/coresight/coresight-tpda.c >>> +++ b/drivers/hwtracing/coresight/coresight-tpda.c >>> @@ -28,24 +28,54 @@ 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) >>> +{ >>> + struct tpda_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); >>> + >>> + if (drvdata->dsb_esize) >>> + drvdata->dsb_esize = 0; >>> + if (drvdata->cmb_esize) >>> + drvdata->cmb_esize = 0; >> >> Why do we need the if (...) check here ? > > The element size of all the TPDM sub-unit should be set to 0 here. > > I will update this in the next patch series. > >> >>> +} >>> + >>> +static void tpda_set_element_size(struct tpda_drvdata *drvdata, u32 >>> *val) >>> +{ >>> + >>> + 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 >>> * Returns >>> - * The dsb element size read from the devicetree if available. >>> + * The element size read from the devicetree if available. >>> * 0 - Otherwise, with a warning once. >> >> This doesn't match the function ? It return 0 on success and >> error (-EINVAL) on failure ? > > 0 means the element size property is found from the devicetree. > > Otherwise, it will return error(-EINVAL). > > I will update this in the next patch series. > >> >>> */ >>> -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; >>> - >>> - rc = fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), >>> - "qcom,dsb-element-size", &size); >>> + int rc = -EINVAL; >>> + >>> + if (!fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), >>> + "qcom,dsb-element-size", &drvdata->dsb_esize)) >>> + rc = 0; >>> + if (!fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), >>> + "qcom,cmb-element-size", &drvdata->cmb_esize)) >>> + rc = 0; >> >> Are we not silently resetting the error if the former failed ? >> >> Could we not : >> >> rc |= fwnode_... >> >> rc |= fwnode_... >> >> instead ? >> >> Also what is the expectation here ? Are these properties a MUST for >> TPDM ? > > The TPDM must have one of the element size property. As long as one Please add a comment in the function. Someone else might try to "fix" it otherwise. Suzuki > > can be found, this TPDM configuration can be considered valid. So this > > function will return 0 if one of the element size property is found. > > > Best, > > Tao > >> >>> 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 +86,12 @@ 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++) { >>> @@ -74,25 +105,21 @@ static int tpda_get_element_size(struct >>> coresight_device *csdev, >>> 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 +136,7 @@ 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 +144,21 @@ 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 >>> */ >>> - 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", -EEXIST); >>> + else >>> + dev_warn_once(&drvdata->csdev->dev, >>> + "Didn't find TPDM elem size"); >> >> "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..29164fd9711f 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; >>> + u8 cmb_esize; >>> }; >>> #endif /* _CORESIGHT_CORESIGHT_TPDA_H */ >> >> Suzuki >> >>
diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtracing/coresight/coresight-tpda.c index 5f82737c37bb..e3762f38abb3 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.c +++ b/drivers/hwtracing/coresight/coresight-tpda.c @@ -28,24 +28,54 @@ 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) +{ + struct tpda_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); + + if (drvdata->dsb_esize) + drvdata->dsb_esize = 0; + if (drvdata->cmb_esize) + drvdata->cmb_esize = 0; +} + +static void tpda_set_element_size(struct tpda_drvdata *drvdata, u32 *val) +{ + + 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 * Returns - * The dsb element size read from the devicetree if available. + * The 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) +static int tpdm_read_element_size(struct tpda_drvdata *drvdata, + 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); + int rc = -EINVAL; + + if (!fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), + "qcom,dsb-element-size", &drvdata->dsb_esize)) + rc = 0; + if (!fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), + "qcom,cmb-element-size", &drvdata->cmb_esize)) + rc = 0; 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 +86,12 @@ 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++) { @@ -74,25 +105,21 @@ static int tpda_get_element_size(struct coresight_device *csdev, 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 +136,7 @@ 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 +144,21 @@ 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 */ - 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", -EEXIST); + else + dev_warn_once(&drvdata->csdev->dev, + "Didn't find TPDM elem 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..29164fd9711f 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; + u8 cmb_esize; }; #endif /* _CORESIGHT_CORESIGHT_TPDA_H */