On 10/01/2023 13:21, Konrad Dybcio wrote:
Some nodes, like EBI0 (DDR) or L3/LLCC, may be connected over more than
one channel. This should be taken into account in bandwidth calcualtion,
calculation
as we're supposed to feed msmbus with the per-channel bandwidth. Add
support for specifying that and use it during bandwidth aggregation.
Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
---
drivers/interconnect/qcom/icc-rpm.c | 7 ++++++-
drivers/interconnect/qcom/icc-rpm.h | 2 ++
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c
index 0516b74abdc7..3207b4c99d04 100644
--- a/drivers/interconnect/qcom/icc-rpm.c
+++ b/drivers/interconnect/qcom/icc-rpm.c
@@ -336,6 +336,7 @@ static void qcom_icc_bus_aggregate(struct icc_provider *provider,
{
struct icc_node *node;
struct qcom_icc_node *qn;
+ u64 sum_avg[QCOM_ICC_NUM_BUCKETS];
int i;
/* Initialise aggregate values */
@@ -353,7 +354,11 @@ static void qcom_icc_bus_aggregate(struct icc_provider *provider,
list_for_each_entry(node, &provider->nodes, node_list) {
qn = node->data;
for (i = 0; i < QCOM_ICC_NUM_BUCKETS; i++) {
- agg_avg[i] += qn->sum_avg[i];
+ if (qn->channels)
when do you actually populate channels ?
I had a quick scan of your series, I didn't see it..
+ sum_avg[i] = div_u64(qn->sum_avg[i], qn->channels);
+ else
+ sum_avg[i] = qn->sum_avg[i];
+ agg_avg[i] += sum_avg[i];
agg_peak[i] = max_t(u64, agg_peak[i], qn->max_peak[i]);
}
}
diff --git a/drivers/interconnect/qcom/icc-rpm.h b/drivers/interconnect/qcom/icc-rpm.h
index 3762648f9d47..eb51680f890d 100644
--- a/drivers/interconnect/qcom/icc-rpm.h
+++ b/drivers/interconnect/qcom/icc-rpm.h
@@ -66,6 +66,7 @@ struct qcom_icc_qos {
* @id: a unique node identifier
* @links: an array of nodes where we can go next while traversing
* @num_links: the total number of @links
+ * @channels: number of channels at this node (e.g. DDR channels)
* @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
@@ -78,6 +79,7 @@ struct qcom_icc_node {
u16 id;
const u16 *links;
u16 num_links;
+ u16 channels;
u16 buswidth;
u64 sum_avg[QCOM_ICC_NUM_BUCKETS];
u64 max_peak[QCOM_ICC_NUM_BUCKETS];
