On Wednesday, August 08, 2012, Jonghwa Lee wrote:
> Bus throughput metric is added to PM QoS in order to control the
> frequency of memory interfaces and busses with PM QoS.
>
> Signed-off-by: Jonghwa Lee <jonghwa3....@samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.p...@samsung.com>
I said some time ago I didn't want any new global PM QoS classes to be
added this way.
Can you please post a driver patch using this new thing?
Rafael
> ---
> include/linux/pm_qos.h | 2 ++
> kernel/power/qos.c | 15 ++++++++++++++-
> 2 files changed, 16 insertions(+), 1 deletions(-)
>
> diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h
> index 233149c..6db4939 100644
> --- a/include/linux/pm_qos.h
> +++ b/include/linux/pm_qos.h
> @@ -15,6 +15,7 @@ enum {
> PM_QOS_CPU_DMA_LATENCY,
> PM_QOS_NETWORK_LATENCY,
> PM_QOS_NETWORK_THROUGHPUT,
> + PM_QOS_BUS_DMA_THROUGHPUT,
>
> /* insert new class ID */
> PM_QOS_NUM_CLASSES,
> @@ -26,6 +27,7 @@ enum {
> #define PM_QOS_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
> #define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0
> #define PM_QOS_DEV_LAT_DEFAULT_VALUE 0
> +#define PM_QOS_BUS_DMA_THROUGHPUT_DEFAULT_VALUE 0
>
> struct pm_qos_request {
> struct plist_node node;
> diff --git a/kernel/power/qos.c b/kernel/power/qos.c
> index 6a031e6..75322cc 100644
> --- a/kernel/power/qos.c
> +++ b/kernel/power/qos.c
> @@ -100,12 +100,25 @@ static struct pm_qos_object network_throughput_pm_qos =
> {
> .name = "network_throughput",
> };
>
> +static BLOCKING_NOTIFIER_HEAD(bus_dma_throughput_notifier);
> +static struct pm_qos_constraints bus_dma_tput_constraints = {
> + .list = PLIST_HEAD_INIT(bus_dma_tput_constraints.list),
> + .target_value = PM_QOS_BUS_DMA_THROUGHPUT_DEFAULT_VALUE,
> + .default_value = PM_QOS_BUS_DMA_THROUGHPUT_DEFAULT_VALUE,
> + .type = PM_QOS_MAX,
> + .notifiers = &bus_dma_throughput_notifier,
> +};
> +static struct pm_qos_object bus_dma_throughput_pm_qos = {
> + .constraints = &bus_dma_tput_constraints,
> + .name = "bus_dma_throughput",
> +};
>
> static struct pm_qos_object *pm_qos_array[] = {
> &null_pm_qos,
> &cpu_dma_pm_qos,
> &network_lat_pm_qos,
> - &network_throughput_pm_qos
> + &network_throughput_pm_qos,
> + &bus_dma_throughput_pm_qos,
> };
>
> static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
>
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