The OPP bindings now support bandwidth values, so add support to parse it
from device tree and store it into the new dev_pm_opp_icc_bw struct, which
is part of the dev_pm_opp.
Signed-off-by: Georgi Djakov <[email protected]>
---
v8:
* Drop bandwidth requests and free memory in _opp_table_kref_release.
* Take into account the supply_count in struct size calculations.
* Free the temporary arrays for peak and average bandwidth.
* Fix the check for opp-level.
* Use dev_warn insted of dev_dbg.
* Rename _of_find_icc_paths to _of_find_icc_paths.
* Rename the variable count to supply_count.
drivers/opp/Kconfig | 1 +
drivers/opp/core.c | 27 +++++++--
drivers/opp/of.c | 121 ++++++++++++++++++++++++++++++++++++++++-
drivers/opp/opp.h | 9 +++
include/linux/pm_opp.h | 12 ++++
5 files changed, 164 insertions(+), 6 deletions(-)
diff --git a/drivers/opp/Kconfig b/drivers/opp/Kconfig
index 35dfc7e80f92..230d2b84436c 100644
--- a/drivers/opp/Kconfig
+++ b/drivers/opp/Kconfig
@@ -2,6 +2,7 @@
config PM_OPP
bool
select SRCU
+ depends on INTERCONNECT || !INTERCONNECT
---help---
SOCs have a standard set of tuples consisting of frequency and
voltage pairs that the device will support per voltage domain. This
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index ce7e4103ec09..a3dd0bc9b9f6 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -999,6 +999,12 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
ret);
}
+ /* Find interconnect path(s) for the device */
+ ret = _of_find_icc_paths(opp_table, dev);
+ if (ret)
+ dev_warn(dev, "%s: Error finding interconnect paths: %d\n",
+ __func__, ret);
+
BLOCKING_INIT_NOTIFIER_HEAD(&opp_table->head);
INIT_LIST_HEAD(&opp_table->opp_list);
kref_init(&opp_table->kref);
@@ -1057,6 +1063,7 @@ static void _opp_table_kref_release(struct kref *kref)
{
struct opp_table *opp_table = container_of(kref, struct opp_table, kref);
struct opp_device *opp_dev, *temp;
+ int i;
_of_clear_opp_table(opp_table);
@@ -1064,6 +1071,12 @@ static void _opp_table_kref_release(struct kref *kref)
if (!IS_ERR(opp_table->clk))
clk_put(opp_table->clk);
+ if (opp_table->paths) {
+ for (i = 0; i < opp_table->path_count; i++)
+ icc_put(opp_table->paths[i]);
+ kfree(opp_table->paths);
+ }
+
WARN_ON(!list_empty(&opp_table->opp_list));
list_for_each_entry_safe(opp_dev, temp, &opp_table->dev_list, node) {
@@ -1243,19 +1256,22 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_remove_all_dynamic);
struct dev_pm_opp *_opp_allocate(struct opp_table *table)
{
struct dev_pm_opp *opp;
- int count, supply_size;
+ int supply_count, supply_size, icc_size;
/* Allocate space for at least one supply */
- count = table->regulator_count > 0 ? table->regulator_count : 1;
- supply_size = sizeof(*opp->supplies) * count;
+ supply_count = table->regulator_count > 0 ? table->regulator_count : 1;
+ supply_size = sizeof(*opp->supplies) * supply_count;
+ icc_size = sizeof(*opp->bandwidth) * table->path_count;
/* allocate new OPP node and supplies structures */
- opp = kzalloc(sizeof(*opp) + supply_size, GFP_KERNEL);
+ opp = kzalloc(sizeof(*opp) + supply_size + icc_size, GFP_KERNEL);
+
if (!opp)
return NULL;
/* Put the supplies at the end of the OPP structure as an empty array */
opp->supplies = (struct dev_pm_opp_supply *)(opp + 1);
+ opp->bandwidth = (struct dev_pm_opp_icc_bw *)(opp->supplies + supply_count);
INIT_LIST_HEAD(&opp->node);
return opp;
@@ -1290,6 +1306,9 @@ int _opp_compare_key(struct dev_pm_opp *opp1, struct dev_pm_opp *opp2)
{
if (opp1->rate != opp2->rate)
return opp1->rate < opp2->rate ? -1 : 1;
+ if (opp1->bandwidth && opp2->bandwidth &&
+ opp1->bandwidth[0].peak != opp2->bandwidth[0].peak)
+ return opp1->bandwidth[0].peak < opp2->bandwidth[0].peak ? -1 : 1;
if (opp1->level != opp2->level)
return opp1->level < opp2->level ? -1 : 1;
return 0;
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index 5179f034751a..d139ad8c8f4f 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -332,6 +332,58 @@ static int _of_opp_alloc_required_opps(struct opp_table *opp_table,
return ret;
}
+int _of_find_icc_paths(struct opp_table *opp_table, struct device *dev)
+{
+ struct device_node *np;
+ int ret, i, count, num_paths;
+
+ np = of_node_get(dev->of_node);
+ if (!np)
+ return 0;
+
+ count = of_count_phandle_with_args(np, "interconnects",
+ "#interconnect-cells");
+ of_node_put(np);
+ if (count < 0)
+ return 0;
+
+ /* two phandles when #interconnect-cells = <1> */
+ if (count % 2) {
+ dev_err(dev, "%s: Invalid interconnects values\n", __func__);
+ return -EINVAL;
+ }
+
+ num_paths = count / 2;
+ opp_table->paths = kcalloc(num_paths, sizeof(*opp_table->paths),
+ GFP_KERNEL);
+ if (!opp_table->paths)
+ return -ENOMEM;
+
+ for (i = 0; i < num_paths; i++) {
+ opp_table->paths[i] = of_icc_get_by_index(dev, i);
+ if (IS_ERR(opp_table->paths[i])) {
+ ret = PTR_ERR(opp_table->paths[i]);
+ if (ret != -EPROBE_DEFER) {
+ dev_err(dev, "%s: Unable to get path%d: %d\n",
+ __func__, i, ret);
+ }
+ goto err;
+ }
+ }
+ opp_table->path_count = num_paths;
+
+ return 0;
+
+err:
+ while (i--)
+ icc_put(opp_table->paths[i]);
+
+ kfree(opp_table->paths);
+ opp_table->paths = NULL;
+
+ return ret;
+}
+
static bool _opp_is_supported(struct device *dev, struct opp_table *opp_table,
struct device_node *np)
{
@@ -524,8 +576,11 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table);
static int _read_opp_key(struct dev_pm_opp *new_opp, struct device_node *np,
bool *rate_not_available)
{
+ struct property *peak, *avg;
+ u32 *peak_bw, *avg_bw;
u64 rate;
- int ret;
+ int ret, i, count;
+ bool found = false;
ret = of_property_read_u64(np, "opp-hz", &rate);
if (!ret) {
@@ -535,10 +590,72 @@ static int _read_opp_key(struct dev_pm_opp *new_opp, struct device_node *np,
* bit guaranteed in clk API.
*/
new_opp->rate = (unsigned long)rate;
+ found = true;
}
*rate_not_available = !!ret;
- of_property_read_u32(np, "opp-level", &new_opp->level);
+ peak = of_find_property(np, "opp-peak-kBps", NULL);
+ if (peak) {
+ /*
+ * Bandwidth consists of peak and average (optional) values:
+ * opp-peak-kBps = <path1_value path2_value>;
+ * opp-avg-kBps = <path1_value path2_value>;
+ */
+ count = peak->length / sizeof(u32);
+ peak_bw = kmalloc_array(count, sizeof(*peak_bw), GFP_KERNEL);
+ if (!peak_bw)
+ return -ENOMEM;
+
+ ret = of_property_read_u32_array(np, "opp-peak-kBps", peak_bw,
+ count);
+ if (ret) {
+ pr_err("%s: Error parsing opp-peak-kBps: %d\n",
+ __func__, ret);
+ goto free_peak_bw;
+ }
+
+ for (i = 0; i < count; i++)
+ new_opp->bandwidth[i].peak = kBps_to_icc(peak_bw[i]);
+
+ found = true;
+ kfree(peak_bw);
+ }
+
+ avg = of_find_property(np, "opp-avg-kBps", NULL);
+ if (peak && avg) {
+ count = avg->length / sizeof(u32);
+ avg_bw = kmalloc_array(count, sizeof(*avg_bw), GFP_KERNEL);
+ if (!avg_bw) {
+ ret = -ENOMEM;
+ goto free_peak_bw;
+ }
+
+ ret = of_property_read_u32_array(np, "opp-avg-kBps", avg_bw,
+ count);
+ if (ret) {
+ pr_err("%s: Error parsing opp-avg-kBps: %d\n",
+ __func__, ret);
+ goto free_avg_bw;
+ }
+
+ for (i = 0; i < count; i++)
+ new_opp->bandwidth[i].avg = kBps_to_icc(avg_bw[i]);
+
+ kfree(avg_bw);
+ }
+
+ if (!of_property_read_u32(np, "opp-level", &new_opp->level))
+ found = true;
+
+ if (found)
+ return 0;
+
+ return ret;
+
+free_avg_bw:
+ kfree(avg_bw);
+free_peak_bw:
+ kfree(peak_bw);
return ret;
}
diff --git a/drivers/opp/opp.h b/drivers/opp/opp.h
index bcadb1e328a4..17d45119d9bc 100644
--- a/drivers/opp/opp.h
+++ b/drivers/opp/opp.h
@@ -12,6 +12,7 @@
#define __DRIVER_OPP_H__
#include <linux/device.h>
+#include <linux/interconnect.h>
#include <linux/kernel.h>
#include <linux/kref.h>
#include <linux/list.h>
@@ -59,6 +60,7 @@ extern struct list_head opp_tables;
* @rate: Frequency in hertz
* @level: Performance level
* @supplies: Power supplies voltage/current values
+ * @bandwidth: Interconnect bandwidth values
* @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's
* frequency from any other OPP's frequency.
* @required_opps: List of OPPs that are required by this OPP.
@@ -81,6 +83,7 @@ struct dev_pm_opp {
unsigned int level;
struct dev_pm_opp_supply *supplies;
+ struct dev_pm_opp_icc_bw *bandwidth;
unsigned long clock_latency_ns;
@@ -146,6 +149,8 @@ enum opp_table_access {
* @regulator_count: Number of power supply regulators. Its value can be -1
* (uninitialized), 0 (no opp-microvolt property) or > 0 (has opp-microvolt
* property).
+ * @paths: Interconnect path handles
+ * @path_count: Number of interconnect paths
* @genpd_performance_state: Device's power domain support performance state.
* @is_genpd: Marks if the OPP table belongs to a genpd.
* @set_opp: Platform specific set_opp callback
@@ -189,6 +194,8 @@ struct opp_table {
struct clk *clk;
struct regulator **regulators;
int regulator_count;
+ struct icc_path **paths;
+ unsigned int path_count;
bool genpd_performance_state;
bool is_genpd;
@@ -224,12 +231,14 @@ void _of_clear_opp_table(struct opp_table *opp_table);
struct opp_table *_managed_opp(struct device *dev, int index);
void _of_opp_free_required_opps(struct opp_table *opp_table,
struct dev_pm_opp *opp);
+int _of_find_icc_paths(struct opp_table *opp_table, struct device *dev);
#else
static inline void _of_init_opp_table(struct opp_table *opp_table, struct device *dev, int index) {}
static inline void _of_clear_opp_table(struct opp_table *opp_table) {}
static inline struct opp_table *_managed_opp(struct device *dev, int index) { return NULL; }
static inline void _of_opp_free_required_opps(struct opp_table *opp_table,
struct dev_pm_opp *opp) {}
+static inline int _of_find_icc_paths(struct opp_table *opp_table, struct device *dev) { return 0; }
#endif
#ifdef CONFIG_DEBUG_FS
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 747861816f4f..cfceb0290401 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -41,6 +41,18 @@ struct dev_pm_opp_supply {
unsigned long u_amp;
};
+/**
+ * struct dev_pm_opp_icc_bw - Interconnect bandwidth values
+ * @avg: Average bandwidth corresponding to this OPP (in icc units)
+ * @peak: Peak bandwidth corresponding to this OPP (in icc units)
+ *
+ * This structure stores the bandwidth values for a single interconnect path.
+ */
+struct dev_pm_opp_icc_bw {
+ u32 avg;
+ u32 peak;
+};
+
/**
* struct dev_pm_opp_info - OPP freq/voltage/current values
* @rate: Target clk rate in hz
On Tue, May 12, 2020 at 03:53:21PM +0300, Georgi Djakov wrote:
> The OPP bindings now support bandwidth values, so add support to parse it
> from device tree and store it into the new dev_pm_opp_icc_bw struct, which
> is part of the dev_pm_opp.
>
> Signed-off-by: Georgi Djakov <[email protected]>
> ---
> v8:
> * Drop bandwidth requests and free memory in _opp_table_kref_release.
> * Take into account the supply_count in struct size calculations.
> * Free the temporary arrays for peak and average bandwidth.
> * Fix the check for opp-level.
> * Use dev_warn insted of dev_dbg.
> * Rename _of_find_icc_paths to _of_find_icc_paths.
> * Rename the variable count to supply_count.
>
> drivers/opp/Kconfig | 1 +
> drivers/opp/core.c | 27 +++++++--
> drivers/opp/of.c | 121 ++++++++++++++++++++++++++++++++++++++++-
> drivers/opp/opp.h | 9 +++
> include/linux/pm_opp.h | 12 ++++
> 5 files changed, 164 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/opp/Kconfig b/drivers/opp/Kconfig
> index 35dfc7e80f92..230d2b84436c 100644
> --- a/drivers/opp/Kconfig
> +++ b/drivers/opp/Kconfig
> @@ -2,6 +2,7 @@
> config PM_OPP
> bool
> select SRCU
> + depends on INTERCONNECT || !INTERCONNECT
> ---help---
> SOCs have a standard set of tuples consisting of frequency and
> voltage pairs that the device will support per voltage domain. This
> diff --git a/drivers/opp/core.c b/drivers/opp/core.c
> index ce7e4103ec09..a3dd0bc9b9f6 100644
> --- a/drivers/opp/core.c
> +++ b/drivers/opp/core.c
> @@ -999,6 +999,12 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
> ret);
> }
>
> + /* Find interconnect path(s) for the device */
> + ret = _of_find_icc_paths(opp_table, dev);
> + if (ret)
> + dev_warn(dev, "%s: Error finding interconnect paths: %d\n",
> + __func__, ret);
> +
> BLOCKING_INIT_NOTIFIER_HEAD(&opp_table->head);
> INIT_LIST_HEAD(&opp_table->opp_list);
> kref_init(&opp_table->kref);
> @@ -1057,6 +1063,7 @@ static void _opp_table_kref_release(struct kref *kref)
> {
> struct opp_table *opp_table = container_of(kref, struct opp_table, kref);
> struct opp_device *opp_dev, *temp;
> + int i;
>
> _of_clear_opp_table(opp_table);
>
> @@ -1064,6 +1071,12 @@ static void _opp_table_kref_release(struct kref *kref)
> if (!IS_ERR(opp_table->clk))
> clk_put(opp_table->clk);
>
> + if (opp_table->paths) {
> + for (i = 0; i < opp_table->path_count; i++)
> + icc_put(opp_table->paths[i]);
> + kfree(opp_table->paths);
> + }
> +
> WARN_ON(!list_empty(&opp_table->opp_list));
>
> list_for_each_entry_safe(opp_dev, temp, &opp_table->dev_list, node) {
> @@ -1243,19 +1256,22 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_remove_all_dynamic);
> struct dev_pm_opp *_opp_allocate(struct opp_table *table)
> {
> struct dev_pm_opp *opp;
> - int count, supply_size;
> + int supply_count, supply_size, icc_size;
>
> /* Allocate space for at least one supply */
> - count = table->regulator_count > 0 ? table->regulator_count : 1;
> - supply_size = sizeof(*opp->supplies) * count;
> + supply_count = table->regulator_count > 0 ? table->regulator_count : 1;
> + supply_size = sizeof(*opp->supplies) * supply_count;
> + icc_size = sizeof(*opp->bandwidth) * table->path_count;
>
> /* allocate new OPP node and supplies structures */
> - opp = kzalloc(sizeof(*opp) + supply_size, GFP_KERNEL);
> + opp = kzalloc(sizeof(*opp) + supply_size + icc_size, GFP_KERNEL);
> +
> if (!opp)
> return NULL;
>
> /* Put the supplies at the end of the OPP structure as an empty array */
> opp->supplies = (struct dev_pm_opp_supply *)(opp + 1);
> + opp->bandwidth = (struct dev_pm_opp_icc_bw *)(opp->supplies + supply_count);
> INIT_LIST_HEAD(&opp->node);
>
> return opp;
> @@ -1290,6 +1306,9 @@ int _opp_compare_key(struct dev_pm_opp *opp1, struct dev_pm_opp *opp2)
> {
> if (opp1->rate != opp2->rate)
> return opp1->rate < opp2->rate ? -1 : 1;
> + if (opp1->bandwidth && opp2->bandwidth &&
> + opp1->bandwidth[0].peak != opp2->bandwidth[0].peak)
> + return opp1->bandwidth[0].peak < opp2->bandwidth[0].peak ? -1 : 1;
> if (opp1->level != opp2->level)
> return opp1->level < opp2->level ? -1 : 1;
> return 0;
> diff --git a/drivers/opp/of.c b/drivers/opp/of.c
> index 5179f034751a..d139ad8c8f4f 100644
> --- a/drivers/opp/of.c
> +++ b/drivers/opp/of.c
> @@ -332,6 +332,58 @@ static int _of_opp_alloc_required_opps(struct opp_table *opp_table,
> return ret;
> }
>
> +int _of_find_icc_paths(struct opp_table *opp_table, struct device *dev)
> +{
> + struct device_node *np;
> + int ret, i, count, num_paths;
> +
> + np = of_node_get(dev->of_node);
> + if (!np)
> + return 0;
> +
> + count = of_count_phandle_with_args(np, "interconnects",
> + "#interconnect-cells");
> + of_node_put(np);
> + if (count < 0)
> + return 0;
> +
> + /* two phandles when #interconnect-cells = <1> */
> + if (count % 2) {
> + dev_err(dev, "%s: Invalid interconnects values\n", __func__);
> + return -EINVAL;
> + }
> +
> + num_paths = count / 2;
> + opp_table->paths = kcalloc(num_paths, sizeof(*opp_table->paths),
> + GFP_KERNEL);
> + if (!opp_table->paths)
> + return -ENOMEM;
> +
> + for (i = 0; i < num_paths; i++) {
> + opp_table->paths[i] = of_icc_get_by_index(dev, i);
> + if (IS_ERR(opp_table->paths[i])) {
> + ret = PTR_ERR(opp_table->paths[i]);
> + if (ret != -EPROBE_DEFER) {
> + dev_err(dev, "%s: Unable to get path%d: %d\n",
> + __func__, i, ret);
> + }
> + goto err;
> + }
> + }
> + opp_table->path_count = num_paths;
> +
> + return 0;
> +
> +err:
> + while (i--)
> + icc_put(opp_table->paths[i]);
> +
> + kfree(opp_table->paths);
> + opp_table->paths = NULL;
> +
> + return ret;
> +}
> +
> static bool _opp_is_supported(struct device *dev, struct opp_table *opp_table,
> struct device_node *np)
> {
> @@ -524,8 +576,11 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table);
> static int _read_opp_key(struct dev_pm_opp *new_opp, struct device_node *np,
> bool *rate_not_available)
> {
> + struct property *peak, *avg;
> + u32 *peak_bw, *avg_bw;
> u64 rate;
> - int ret;
> + int ret, i, count;
> + bool found = false;
>
> ret = of_property_read_u64(np, "opp-hz", &rate);
> if (!ret) {
> @@ -535,10 +590,72 @@ static int _read_opp_key(struct dev_pm_opp *new_opp, struct device_node *np,
> * bit guaranteed in clk API.
> */
> new_opp->rate = (unsigned long)rate;
> + found = true;
> }
> *rate_not_available = !!ret;
>
> - of_property_read_u32(np, "opp-level", &new_opp->level);
> + peak = of_find_property(np, "opp-peak-kBps", NULL);
> + if (peak) {
> + /*
> + * Bandwidth consists of peak and average (optional) values:
> + * opp-peak-kBps = <path1_value path2_value>;
> + * opp-avg-kBps = <path1_value path2_value>;
> + */
> + count = peak->length / sizeof(u32);
> + peak_bw = kmalloc_array(count, sizeof(*peak_bw), GFP_KERNEL);
> + if (!peak_bw)
> + return -ENOMEM;
> +
> + ret = of_property_read_u32_array(np, "opp-peak-kBps", peak_bw,
> + count);
> + if (ret) {
> + pr_err("%s: Error parsing opp-peak-kBps: %d\n",
> + __func__, ret);
> + goto free_peak_bw;
> + }
> +
> + for (i = 0; i < count; i++)
> + new_opp->bandwidth[i].peak = kBps_to_icc(peak_bw[i]);
> +
> + found = true;
> + kfree(peak_bw);
> + }
> +
> + avg = of_find_property(np, "opp-avg-kBps", NULL);
> + if (peak && avg) {
> + count = avg->length / sizeof(u32);
> + avg_bw = kmalloc_array(count, sizeof(*avg_bw), GFP_KERNEL);
> + if (!avg_bw) {
> + ret = -ENOMEM;
> + goto free_peak_bw;
> + }
> +
> + ret = of_property_read_u32_array(np, "opp-avg-kBps", avg_bw,
> + count);
> + if (ret) {
> + pr_err("%s: Error parsing opp-avg-kBps: %d\n",
> + __func__, ret);
> + goto free_avg_bw;
> + }
> +
> + for (i = 0; i < count; i++)
> + new_opp->bandwidth[i].avg = kBps_to_icc(avg_bw[i]);
> +
> + kfree(avg_bw);
> + }
> +
> + if (!of_property_read_u32(np, "opp-level", &new_opp->level))
> + found = true;
> +
> + if (found)
> + return 0;
> +
> + return ret;
> +
> +free_avg_bw:
> + kfree(avg_bw);
> +free_peak_bw:
> + kfree(peak_bw);
>
> return ret;
> }
> diff --git a/drivers/opp/opp.h b/drivers/opp/opp.h
> index bcadb1e328a4..17d45119d9bc 100644
> --- a/drivers/opp/opp.h
> +++ b/drivers/opp/opp.h
> @@ -12,6 +12,7 @@
> #define __DRIVER_OPP_H__
>
> #include <linux/device.h>
> +#include <linux/interconnect.h>
> #include <linux/kernel.h>
> #include <linux/kref.h>
> #include <linux/list.h>
> @@ -59,6 +60,7 @@ extern struct list_head opp_tables;
> * @rate: Frequency in hertz
> * @level: Performance level
> * @supplies: Power supplies voltage/current values
> + * @bandwidth: Interconnect bandwidth values
> * @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's
> * frequency from any other OPP's frequency.
> * @required_opps: List of OPPs that are required by this OPP.
> @@ -81,6 +83,7 @@ struct dev_pm_opp {
> unsigned int level;
>
> struct dev_pm_opp_supply *supplies;
> + struct dev_pm_opp_icc_bw *bandwidth;
>
> unsigned long clock_latency_ns;
>
> @@ -146,6 +149,8 @@ enum opp_table_access {
> * @regulator_count: Number of power supply regulators. Its value can be -1
> * (uninitialized), 0 (no opp-microvolt property) or > 0 (has opp-microvolt
> * property).
> + * @paths: Interconnect path handles
> + * @path_count: Number of interconnect paths
> * @genpd_performance_state: Device's power domain support performance state.
> * @is_genpd: Marks if the OPP table belongs to a genpd.
> * @set_opp: Platform specific set_opp callback
> @@ -189,6 +194,8 @@ struct opp_table {
> struct clk *clk;
> struct regulator **regulators;
> int regulator_count;
> + struct icc_path **paths;
> + unsigned int path_count;
> bool genpd_performance_state;
> bool is_genpd;
>
> @@ -224,12 +231,14 @@ void _of_clear_opp_table(struct opp_table *opp_table);
> struct opp_table *_managed_opp(struct device *dev, int index);
> void _of_opp_free_required_opps(struct opp_table *opp_table,
> struct dev_pm_opp *opp);
> +int _of_find_icc_paths(struct opp_table *opp_table, struct device *dev);
> #else
> static inline void _of_init_opp_table(struct opp_table *opp_table, struct device *dev, int index) {}
> static inline void _of_clear_opp_table(struct opp_table *opp_table) {}
> static inline struct opp_table *_managed_opp(struct device *dev, int index) { return NULL; }
> static inline void _of_opp_free_required_opps(struct opp_table *opp_table,
> struct dev_pm_opp *opp) {}
> +static inline int _of_find_icc_paths(struct opp_table *opp_table, struct device *dev) { return 0; }
> #endif
>
> #ifdef CONFIG_DEBUG_FS
> diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
> index 747861816f4f..cfceb0290401 100644
> --- a/include/linux/pm_opp.h
> +++ b/include/linux/pm_opp.h
> @@ -41,6 +41,18 @@ struct dev_pm_opp_supply {
> unsigned long u_amp;
> };
>
> +/**
> + * struct dev_pm_opp_icc_bw - Interconnect bandwidth values
> + * @avg: Average bandwidth corresponding to this OPP (in icc units)
> + * @peak: Peak bandwidth corresponding to this OPP (in icc units)
> + *
> + * This structure stores the bandwidth values for a single interconnect path.
> + */
> +struct dev_pm_opp_icc_bw {
> + u32 avg;
> + u32 peak;
> +};
> +
> /**
> * struct dev_pm_opp_info - OPP freq/voltage/current values
> * @rate: Target clk rate in hz
Reviewed-by: Matthias Kaehlcke <[email protected]>
On 12-05-20, 15:53, Georgi Djakov wrote:
> The OPP bindings now support bandwidth values, so add support to parse it
> from device tree and store it into the new dev_pm_opp_icc_bw struct, which
> is part of the dev_pm_opp.
>
> Signed-off-by: Georgi Djakov <[email protected]>
> ---
> v8:
> * Drop bandwidth requests and free memory in _opp_table_kref_release.
> * Take into account the supply_count in struct size calculations.
> * Free the temporary arrays for peak and average bandwidth.
> * Fix the check for opp-level.
> * Use dev_warn insted of dev_dbg.
> * Rename _of_find_icc_paths to _of_find_icc_paths.
> * Rename the variable count to supply_count.
Added this delta to this patch:
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index a3dd0bc9b9f6..8b640eac86d5 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1000,7 +1000,7 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
}
/* Find interconnect path(s) for the device */
- ret = _of_find_icc_paths(opp_table, dev);
+ ret = dev_pm_opp_of_find_icc_paths(dev, opp_table);
if (ret)
dev_warn(dev, "%s: Error finding interconnect paths: %d\n",
__func__, ret);
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index a41c0dc2ac04..15f30ed70bbc 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -332,10 +332,12 @@ static int _of_opp_alloc_required_opps(struct opp_table *opp_table,
return ret;
}
-int _of_find_icc_paths(struct opp_table *opp_table, struct device *dev)
+int dev_pm_opp_of_find_icc_paths(struct device *dev,
+ struct opp_table *opp_table)
{
struct device_node *np;
int ret, i, count, num_paths;
+ struct icc_path **paths;
np = of_node_get(dev->of_node);
if (!np)
@@ -354,15 +356,14 @@ int _of_find_icc_paths(struct opp_table *opp_table, struct device *dev)
}
num_paths = count / 2;
- opp_table->paths = kcalloc(num_paths, sizeof(*opp_table->paths),
- GFP_KERNEL);
- if (!opp_table->paths)
+ paths = kcalloc(num_paths, sizeof(*paths), GFP_KERNEL);
+ if (!paths)
return -ENOMEM;
for (i = 0; i < num_paths; i++) {
- opp_table->paths[i] = of_icc_get_by_index(dev, i);
- if (IS_ERR(opp_table->paths[i])) {
- ret = PTR_ERR(opp_table->paths[i]);
+ paths[i] = of_icc_get_by_index(dev, i);
+ if (IS_ERR(paths[i])) {
+ ret = PTR_ERR(paths[i]);
if (ret != -EPROBE_DEFER) {
dev_err(dev, "%s: Unable to get path%d: %d\n",
__func__, i, ret);
@@ -370,19 +371,23 @@ int _of_find_icc_paths(struct opp_table *opp_table, struct device *dev)
goto err;
}
}
- opp_table->path_count = num_paths;
+
+ if (opp_table) {
+ opp_table->paths = paths;
+ opp_table->path_count = num_paths;
+ }
return 0;
err:
while (i--)
- icc_put(opp_table->paths[i]);
+ icc_put(paths[i]);
- kfree(opp_table->paths);
- opp_table->paths = NULL;
+ kfree(paths);
return ret;
}
+EXPORT_SYMBOL_GPL(dev_pm_opp_of_find_icc_paths);
static bool _opp_is_supported(struct device *dev, struct opp_table *opp_table,
struct device_node *np)
diff --git a/drivers/opp/opp.h b/drivers/opp/opp.h
index 17d45119d9bc..2b81ffef1ba4 100644
--- a/drivers/opp/opp.h
+++ b/drivers/opp/opp.h
@@ -231,14 +231,12 @@ void _of_clear_opp_table(struct opp_table *opp_table);
struct opp_table *_managed_opp(struct device *dev, int index);
void _of_opp_free_required_opps(struct opp_table *opp_table,
struct dev_pm_opp *opp);
-int _of_find_icc_paths(struct opp_table *opp_table, struct device *dev);
#else
static inline void _of_init_opp_table(struct opp_table *opp_table, struct device *dev, int index) {}
static inline void _of_clear_opp_table(struct opp_table *opp_table) {}
static inline struct opp_table *_managed_opp(struct device *dev, int index) { return NULL; }
static inline void _of_opp_free_required_opps(struct opp_table *opp_table,
struct dev_pm_opp *opp) {}
-static inline int _of_find_icc_paths(struct opp_table *opp_table, struct device *dev) { return 0; }
#endif
#ifdef CONFIG_DEBUG_FS
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index cfceb0290401..d5c4a329321d 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -372,6 +372,7 @@ 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 device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp);
int of_get_required_opp_performance_state(struct device_node *np, int index);
+int dev_pm_opp_of_find_icc_paths(struct device *dev, struct opp_table *opp_table);
void dev_pm_opp_of_register_em(struct cpumask *cpus);
#else
static inline int dev_pm_opp_of_add_table(struct device *dev)
@@ -420,6 +421,11 @@ static inline int of_get_required_opp_performance_state(struct device_node *np,
{
return -ENOTSUPP;
}
+
+static inline int dev_pm_opp_of_find_icc_paths(struct device *dev, struct opp_table *opp_table)
+{
+ return -ENOTSUPP;
+}
#endif
#endif /* __LINUX_OPP_H__ */
--
viresh
On 13-05-20, 12:11, Viresh Kumar wrote:
> On 12-05-20, 15:53, Georgi Djakov wrote:
> > The OPP bindings now support bandwidth values, so add support to parse it
> > from device tree and store it into the new dev_pm_opp_icc_bw struct, which
> > is part of the dev_pm_opp.
> >
> > Signed-off-by: Georgi Djakov <[email protected]>
> > ---
> > v8:
> > * Drop bandwidth requests and free memory in _opp_table_kref_release.
> > * Take into account the supply_count in struct size calculations.
> > * Free the temporary arrays for peak and average bandwidth.
> > * Fix the check for opp-level.
> > * Use dev_warn insted of dev_dbg.
> > * Rename _of_find_icc_paths to _of_find_icc_paths.
> > * Rename the variable count to supply_count.
>
> Added this delta to this patch:
+this :)
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index 15f30ed70bbc..06e38f95116c 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -336,7 +336,7 @@ int dev_pm_opp_of_find_icc_paths(struct device *dev,
struct opp_table *opp_table)
{
struct device_node *np;
- int ret, i, count, num_paths;
+ int ret = 0, i, count, num_paths;
struct icc_path **paths;
np = of_node_get(dev->of_node);
@@ -375,10 +375,9 @@ int dev_pm_opp_of_find_icc_paths(struct device *dev,
if (opp_table) {
opp_table->paths = paths;
opp_table->path_count = num_paths;
+ return 0;
}
- return 0;
-
err:
while (i--)
icc_put(paths[i]);
--
viresh
On 12-05-20, 15:53, Georgi Djakov wrote:
> struct dev_pm_opp *_opp_allocate(struct opp_table *table)
> {
> struct dev_pm_opp *opp;
> - int count, supply_size;
> + int supply_count, supply_size, icc_size;
>
> /* Allocate space for at least one supply */
> - count = table->regulator_count > 0 ? table->regulator_count : 1;
> - supply_size = sizeof(*opp->supplies) * count;
> + supply_count = table->regulator_count > 0 ? table->regulator_count : 1;
> + supply_size = sizeof(*opp->supplies) * supply_count;
> + icc_size = sizeof(*opp->bandwidth) * table->path_count;
>
> /* allocate new OPP node and supplies structures */
> - opp = kzalloc(sizeof(*opp) + supply_size, GFP_KERNEL);
> + opp = kzalloc(sizeof(*opp) + supply_size + icc_size, GFP_KERNEL);
> +
> if (!opp)
> return NULL;
>
> /* Put the supplies at the end of the OPP structure as an empty array */
> opp->supplies = (struct dev_pm_opp_supply *)(opp + 1);
> + opp->bandwidth = (struct dev_pm_opp_icc_bw *)(opp->supplies + supply_count);
> INIT_LIST_HEAD(&opp->node);
Added this delta here.
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 7302f2631f8d..dfbd3d10410c 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1330,7 +1330,8 @@ struct dev_pm_opp *_opp_allocate(struct opp_table *table)
/* Put the supplies at the end of the OPP structure as an empty array */
opp->supplies = (struct dev_pm_opp_supply *)(opp + 1);
- opp->bandwidth = (struct dev_pm_opp_icc_bw *)(opp->supplies + supply_count);
+ if (icc_size)
+ opp->bandwidth = (struct dev_pm_opp_icc_bw *)(opp->supplies + supply_count);
INIT_LIST_HEAD(&opp->node);
return opp;
--
viresh
On 2020-05-29 10:14, Viresh Kumar wrote:
> On 12-05-20, 15:53, Georgi Djakov wrote:
>> struct dev_pm_opp *_opp_allocate(struct opp_table *table)
>> {
>> struct dev_pm_opp *opp;
>> - int count, supply_size;
>> + int supply_count, supply_size, icc_size;
>>
>> /* Allocate space for at least one supply */
>> - count = table->regulator_count > 0 ? table->regulator_count : 1;
>> - supply_size = sizeof(*opp->supplies) * count;
>> + supply_count = table->regulator_count > 0 ? table->regulator_count :
>> 1;
>> + supply_size = sizeof(*opp->supplies) * supply_count;
>> + icc_size = sizeof(*opp->bandwidth) * table->path_count;
>>
>> /* allocate new OPP node and supplies structures */
>> - opp = kzalloc(sizeof(*opp) + supply_size, GFP_KERNEL);
>> + opp = kzalloc(sizeof(*opp) + supply_size + icc_size, GFP_KERNEL);
>> +
>> if (!opp)
>> return NULL;
>>
>> /* Put the supplies at the end of the OPP structure as an empty
>> array */
>> opp->supplies = (struct dev_pm_opp_supply *)(opp + 1);
>> + opp->bandwidth = (struct dev_pm_opp_icc_bw *)(opp->supplies +
>> supply_count);
>> INIT_LIST_HEAD(&opp->node);
>
> Added this delta here.
>
> diff --git a/drivers/opp/core.c b/drivers/opp/core.c
> index 7302f2631f8d..dfbd3d10410c 100644
> --- a/drivers/opp/core.c
> +++ b/drivers/opp/core.c
> @@ -1330,7 +1330,8 @@ struct dev_pm_opp *_opp_allocate(struct opp_table
> *table)
>
> /* Put the supplies at the end of the OPP structure as an empty
> array */
> opp->supplies = (struct dev_pm_opp_supply *)(opp + 1);
> - opp->bandwidth = (struct dev_pm_opp_icc_bw *)(opp->supplies +
> supply_count);
> + if (icc_size)
> + opp->bandwidth = (struct dev_pm_opp_icc_bw
> *)(opp->supplies + supply_count);
nice catch!
Reviewed-by: Sibi Sankar <[email protected]>
> INIT_LIST_HEAD(&opp->node);
>
> return opp;
--
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