| Message ID | 20220705072336.742703-5-leo.yan@linaro.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | interconnect: qcom: icc-rpm: Support bucket | expand |
On 5.07.22 10:23, Leo Yan wrote: > The current interconnect rpm driver uses a single aggregate bandwidth to > calculate the clock rates for both active and sleep clocks; therefore, > it has no chance to separate bandwidth requests for these two kinds of > clocks. > > This patch studies the implementation from interconnect rpmh driver to > support multiple buckets. The rpmh driver provides three buckets for > AMC, WAKE, and SLEEP; this driver only needs to use WAKE and SLEEP > buckets, but we keep the same way with rpmh driver, this can allow us to > reuse the DT binding and avoid to define duplicated data structures. > > This patch introduces two callbacks: qcom_icc_pre_bw_aggregate() is used > to clean up bucket values before aggregate bandwidth requests, and > qcom_icc_bw_aggregate() is to aggregate bandwidth for buckets. > > Signed-off-by: Leo Yan <leo.yan@linaro.org> > --- > drivers/interconnect/qcom/icc-rpm.c | 51 ++++++++++++++++++++++++++++- > drivers/interconnect/qcom/icc-rpm.h | 6 ++++ > 2 files changed, 56 insertions(+), 1 deletion(-) > > diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c > index 8c9d5cc7276c..b025fc6b97c9 100644 > --- a/drivers/interconnect/qcom/icc-rpm.c > +++ b/drivers/interconnect/qcom/icc-rpm.c > @@ -254,6 +254,54 @@ static int __qcom_icc_set(struct icc_node *n, struct qcom_icc_node *qn, > return 0; > } > > +/** > + * qcom_icc_rpm_pre_bw_aggregate - cleans up values before re-aggregate requests This does not match with the name of the function below. > + * @node: icc node to operate on > + */ > +static void qcom_icc_pre_bw_aggregate(struct icc_node *node) > +{ > + struct qcom_icc_node *qn; > + size_t i; > + > + qn = node->data; > + for (i = 0; i < QCOM_ICC_NUM_BUCKETS; i++) { > + qn->sum_avg[i] = 0; > + qn->max_peak[i] = 0; > + } > +} > + [..] Thanks, Georgi
On Thu, Jul 07, 2022 at 05:29:16PM +0300, Georgi Djakov wrote: [...] > > +/** > > + * qcom_icc_rpm_pre_bw_aggregate - cleans up values before re-aggregate requests > > This does not match with the name of the function below. Will fix it. > > + * @node: icc node to operate on > > + */ > > +static void qcom_icc_pre_bw_aggregate(struct icc_node *node) Thanks, Leo
diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c index 8c9d5cc7276c..b025fc6b97c9 100644 --- a/drivers/interconnect/qcom/icc-rpm.c +++ b/drivers/interconnect/qcom/icc-rpm.c @@ -254,6 +254,54 @@ static int __qcom_icc_set(struct icc_node *n, struct qcom_icc_node *qn, return 0; } +/** + * qcom_icc_rpm_pre_bw_aggregate - cleans up values before re-aggregate requests + * @node: icc node to operate on + */ +static void qcom_icc_pre_bw_aggregate(struct icc_node *node) +{ + struct qcom_icc_node *qn; + size_t i; + + qn = node->data; + for (i = 0; i < QCOM_ICC_NUM_BUCKETS; i++) { + qn->sum_avg[i] = 0; + qn->max_peak[i] = 0; + } +} + +/** + * qcom_icc_bw_aggregate - aggregate bw for buckets indicated by tag + * @node: node to aggregate + * @tag: tag to indicate which buckets to aggregate + * @avg_bw: new bw to sum aggregate + * @peak_bw: new bw to max aggregate + * @agg_avg: existing aggregate avg bw val + * @agg_peak: existing aggregate peak bw val + */ +static int qcom_icc_bw_aggregate(struct icc_node *node, u32 tag, u32 avg_bw, + u32 peak_bw, u32 *agg_avg, u32 *agg_peak) +{ + size_t i; + struct qcom_icc_node *qn; + + qn = node->data; + + if (!tag) + tag = QCOM_ICC_TAG_ALWAYS; + + for (i = 0; i < QCOM_ICC_NUM_BUCKETS; i++) { + if (tag & BIT(i)) { + qn->sum_avg[i] += avg_bw; + qn->max_peak[i] = max_t(u32, qn->max_peak[i], peak_bw); + } + } + + *agg_avg += avg_bw; + *agg_peak = max_t(u32, *agg_peak, peak_bw); + return 0; +} + static int qcom_icc_set(struct icc_node *src, struct icc_node *dst) { struct qcom_icc_provider *qp; @@ -414,7 +462,8 @@ int qnoc_probe(struct platform_device *pdev) INIT_LIST_HEAD(&provider->nodes); provider->dev = dev; provider->set = qcom_icc_set; - provider->aggregate = icc_std_aggregate; + provider->pre_aggregate = qcom_icc_pre_bw_aggregate; + provider->aggregate = qcom_icc_bw_aggregate; provider->xlate_extended = qcom_icc_xlate_extended; provider->data = data; diff --git a/drivers/interconnect/qcom/icc-rpm.h b/drivers/interconnect/qcom/icc-rpm.h index ebee9009301e..a49af844ab13 100644 --- a/drivers/interconnect/qcom/icc-rpm.h +++ b/drivers/interconnect/qcom/icc-rpm.h @@ -6,6 +6,8 @@ #ifndef __DRIVERS_INTERCONNECT_QCOM_ICC_RPM_H #define __DRIVERS_INTERCONNECT_QCOM_ICC_RPM_H +#include <dt-bindings/interconnect/qcom,icc.h> + #define RPM_BUS_MASTER_REQ 0x73616d62 #define RPM_BUS_SLAVE_REQ 0x766c7362 @@ -65,6 +67,8 @@ struct qcom_icc_qos { * @links: an array of nodes where we can go next while traversing * @num_links: the total number of @links * @buswidth: width of the interconnect between a node and the bus (bytes) + * @sum_avg: current sum aggregate value of all avg bw requests + * @max_peak: current max aggregate value of all peak bw requests * @mas_rpm_id: RPM id for devices that are bus masters * @slv_rpm_id: RPM id for devices that are bus slaves * @qos: NoC QoS setting parameters @@ -75,6 +79,8 @@ struct qcom_icc_node { const u16 *links; u16 num_links; u16 buswidth; + u64 sum_avg[QCOM_ICC_NUM_BUCKETS]; + u64 max_peak[QCOM_ICC_NUM_BUCKETS]; int mas_rpm_id; int slv_rpm_id; struct qcom_icc_qos qos;
The current interconnect rpm driver uses a single aggregate bandwidth to calculate the clock rates for both active and sleep clocks; therefore, it has no chance to separate bandwidth requests for these two kinds of clocks. This patch studies the implementation from interconnect rpmh driver to support multiple buckets. The rpmh driver provides three buckets for AMC, WAKE, and SLEEP; this driver only needs to use WAKE and SLEEP buckets, but we keep the same way with rpmh driver, this can allow us to reuse the DT binding and avoid to define duplicated data structures. This patch introduces two callbacks: qcom_icc_pre_bw_aggregate() is used to clean up bucket values before aggregate bandwidth requests, and qcom_icc_bw_aggregate() is to aggregate bandwidth for buckets. Signed-off-by: Leo Yan <leo.yan@linaro.org> --- drivers/interconnect/qcom/icc-rpm.c | 51 ++++++++++++++++++++++++++++- drivers/interconnect/qcom/icc-rpm.h | 6 ++++ 2 files changed, 56 insertions(+), 1 deletion(-)