| Message ID | 20180827151112.25211-8-jcrouse@codeaurora.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add interconnect support + bindings for A630 GPU | expand |
On 8/27/2018 8:41 PM, Jordan Crouse wrote: > Add dev_pm_opp_get_interconnect_bw() to read the interconnect > bandwidth values for a given OPP. > > Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> > --- > drivers/opp/of.c | 36 ++++++++++++++++++++++++++++++++++++ > include/linux/pm_opp.h | 7 +++++++ > 2 files changed, 43 insertions(+) > > diff --git a/drivers/opp/of.c b/drivers/opp/of.c > index 7af0ddec936b..6a5eecaaf8c1 100644 > --- a/drivers/opp/of.c > +++ b/drivers/opp/of.c > @@ -777,3 +777,39 @@ struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp) > return of_node_get(opp->np); > } > EXPORT_SYMBOL_GPL(dev_pm_opp_get_of_node); > + > +/** > + * dev_pm_opp_get_interconnect_bw() - Get the interconnect bandwidth for the opp > + * @opp: opp containing the bandwidth values > + * @pathname: name of the interconnect path for the bandwidth values > + * @avgbw: Pointer for the value to hold the average BW defined for the OPP > + * @peakbw: Pointer for the value to hold the peak BW defined for the OPP > + * > + * Return: Negative value on error or 0 on success > + */ > +int dev_pm_opp_get_interconnect_bw(struct dev_pm_opp *opp, > + const char *pathname, u64 *avgbw, u64 *peakbw) > +{ > + char name[NAME_MAX]; > + struct property *prop; > + int count; > + > + if (IS_ERR_OR_NULL(opp)) > + return -ENOENT; > + > + snprintf(name, NAME_MAX, "opp-interconnect-bw-%s", pathname); > + prop = of_find_property(opp->np, name, NULL); > + > + if (!prop) > + return -ENOENT; > + > + count = of_property_count_u64_elems(opp->np, name); > + if (count != 2) > + return -EINVAL; > + > + of_property_read_u64_index(opp->np, name, 0, avgbw); > + of_property_read_u64_index(opp->np, name, 0, peakbw); This should be index 1 for peak bandwidth of_property_read_u64_index(opp->np, name, 1, peakbw); I tested with this fix and the GPU's interconnect summary now shows non zero values for peak bandwidth. Can you please raise a newer version of this patch? I will have it pulled into our downstream builds. > + > + return 0; > +} > +EXPORT_SYMBOL_GPL(dev_pm_opp_get_interconnect_bw); > diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h > index 099b31960dec..70e49e259d0e 100644 > --- a/include/linux/pm_opp.h > +++ b/include/linux/pm_opp.h > @@ -301,6 +301,7 @@ int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpuma > struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev); > struct dev_pm_opp *of_dev_pm_opp_find_required_opp(struct device *dev, struct device_node *np); > struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp); > +int dev_pm_opp_get_interconnect_bw(struct dev_pm_opp *opp, const char *pathname, u64 *avgbw, u64 *peakbw); > #else > static inline int dev_pm_opp_of_add_table(struct device *dev) > { > @@ -343,6 +344,12 @@ static inline struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp) > { > return NULL; > } > + > +static inline int dev_pm_opp_get_interconnect_bw(struct dev_pm_opp *opp, const char *pathname, > + u64 *avgbw, u64 *peakbw) > +{ > + return -ENOTSUPP; > +} > #endif > > #endif /* __LINUX_OPP_H__ */ >
On Fri, Oct 05, 2018 at 12:06:06PM +0530, Sharat Masetty wrote: > > > On 8/27/2018 8:41 PM, Jordan Crouse wrote: > >Add dev_pm_opp_get_interconnect_bw() to read the interconnect > >bandwidth values for a given OPP. > > > >Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> > >--- > > drivers/opp/of.c | 36 ++++++++++++++++++++++++++++++++++++ > > include/linux/pm_opp.h | 7 +++++++ > > 2 files changed, 43 insertions(+) > > > >diff --git a/drivers/opp/of.c b/drivers/opp/of.c > >index 7af0ddec936b..6a5eecaaf8c1 100644 > >--- a/drivers/opp/of.c > >+++ b/drivers/opp/of.c > >@@ -777,3 +777,39 @@ struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp) > > return of_node_get(opp->np); > > } > > EXPORT_SYMBOL_GPL(dev_pm_opp_get_of_node); > >+ > >+/** > >+ * dev_pm_opp_get_interconnect_bw() - Get the interconnect bandwidth for the opp > >+ * @opp: opp containing the bandwidth values > >+ * @pathname: name of the interconnect path for the bandwidth values > >+ * @avgbw: Pointer for the value to hold the average BW defined for the OPP > >+ * @peakbw: Pointer for the value to hold the peak BW defined for the OPP > >+ * > >+ * Return: Negative value on error or 0 on success > >+ */ > >+int dev_pm_opp_get_interconnect_bw(struct dev_pm_opp *opp, > >+ const char *pathname, u64 *avgbw, u64 *peakbw) > >+{ > >+ char name[NAME_MAX]; > >+ struct property *prop; > >+ int count; > >+ > >+ if (IS_ERR_OR_NULL(opp)) > >+ return -ENOENT; > >+ > >+ snprintf(name, NAME_MAX, "opp-interconnect-bw-%s", pathname); > >+ prop = of_find_property(opp->np, name, NULL); > >+ > >+ if (!prop) > >+ return -ENOENT; > >+ > >+ count = of_property_count_u64_elems(opp->np, name); > >+ if (count != 2) > >+ return -EINVAL; > >+ > >+ of_property_read_u64_index(opp->np, name, 0, avgbw); > >+ of_property_read_u64_index(opp->np, name, 0, peakbw); > This should be index 1 for peak bandwidth > of_property_read_u64_index(opp->np, name, 1, peakbw); > I tested with this fix and the GPU's interconnect summary now shows > non zero values for peak bandwidth. Can you please raise a newer > version of this patch? I will have it pulled into our downstream > builds. Ahhh! I can generate a new one but I think we should come to an agreement on the bindings. Jordan > >+ > >+ return 0; > >+} > >+EXPORT_SYMBOL_GPL(dev_pm_opp_get_interconnect_bw); > >diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h > >index 099b31960dec..70e49e259d0e 100644 > >--- a/include/linux/pm_opp.h > >+++ b/include/linux/pm_opp.h > >@@ -301,6 +301,7 @@ int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpuma > > struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev); > > struct dev_pm_opp *of_dev_pm_opp_find_required_opp(struct device *dev, struct device_node *np); > > struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp); > >+int dev_pm_opp_get_interconnect_bw(struct dev_pm_opp *opp, const char *pathname, u64 *avgbw, u64 *peakbw); > > #else > > static inline int dev_pm_opp_of_add_table(struct device *dev) > > { > >@@ -343,6 +344,12 @@ static inline struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp) > > { > > return NULL; > > } > >+ > >+static inline int dev_pm_opp_get_interconnect_bw(struct dev_pm_opp *opp, const char *pathname, > >+ u64 *avgbw, u64 *peakbw) > >+{ > >+ return -ENOTSUPP; > >+} > > #endif > > #endif /* __LINUX_OPP_H__ */ > > > > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > Linux Foundation Collaborative Project
diff --git a/drivers/opp/of.c b/drivers/opp/of.c index 7af0ddec936b..6a5eecaaf8c1 100644 --- a/drivers/opp/of.c +++ b/drivers/opp/of.c @@ -777,3 +777,39 @@ struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp) return of_node_get(opp->np); } EXPORT_SYMBOL_GPL(dev_pm_opp_get_of_node); + +/** + * dev_pm_opp_get_interconnect_bw() - Get the interconnect bandwidth for the opp + * @opp: opp containing the bandwidth values + * @pathname: name of the interconnect path for the bandwidth values + * @avgbw: Pointer for the value to hold the average BW defined for the OPP + * @peakbw: Pointer for the value to hold the peak BW defined for the OPP + * + * Return: Negative value on error or 0 on success + */ +int dev_pm_opp_get_interconnect_bw(struct dev_pm_opp *opp, + const char *pathname, u64 *avgbw, u64 *peakbw) +{ + char name[NAME_MAX]; + struct property *prop; + int count; + + if (IS_ERR_OR_NULL(opp)) + return -ENOENT; + + snprintf(name, NAME_MAX, "opp-interconnect-bw-%s", pathname); + prop = of_find_property(opp->np, name, NULL); + + if (!prop) + return -ENOENT; + + count = of_property_count_u64_elems(opp->np, name); + if (count != 2) + return -EINVAL; + + of_property_read_u64_index(opp->np, name, 0, avgbw); + of_property_read_u64_index(opp->np, name, 0, peakbw); + + return 0; +} +EXPORT_SYMBOL_GPL(dev_pm_opp_get_interconnect_bw); diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h index 099b31960dec..70e49e259d0e 100644 --- a/include/linux/pm_opp.h +++ b/include/linux/pm_opp.h @@ -301,6 +301,7 @@ int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpuma struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev); struct dev_pm_opp *of_dev_pm_opp_find_required_opp(struct device *dev, struct device_node *np); struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp); +int dev_pm_opp_get_interconnect_bw(struct dev_pm_opp *opp, const char *pathname, u64 *avgbw, u64 *peakbw); #else static inline int dev_pm_opp_of_add_table(struct device *dev) { @@ -343,6 +344,12 @@ static inline struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp) { return NULL; } + +static inline int dev_pm_opp_get_interconnect_bw(struct dev_pm_opp *opp, const char *pathname, + u64 *avgbw, u64 *peakbw) +{ + return -ENOTSUPP; +} #endif #endif /* __LINUX_OPP_H__ */
Add dev_pm_opp_get_interconnect_bw() to read the interconnect bandwidth values for a given OPP. Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> --- drivers/opp/of.c | 36 ++++++++++++++++++++++++++++++++++++ include/linux/pm_opp.h | 7 +++++++ 2 files changed, 43 insertions(+)