On Wed, Feb 15, 2017 at 6:00 AM, <andrei-tiberiu.bre...@nxp.com> wrote:
> From: Tiberiu Breana <andrei-tiberiu.bre...@nxp.com>
>
> Add support for an extra config parameter for perf commands:
> axi_id, which will be written in the MMDC's MADPCR1 register,
> to filter memory usage profiling (see i.MX6 reference manual,
> chapter 44.7 MMDC Profiling for AXI id usage).
>
> Signed-off-by: Tiberiu Breana <andrei-tiberiu.bre...@nxp.com>
Acked-by: Frank Li <frank...@nxp.com>
> ---
> arch/arm/mach-imx/mmdc.c | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/arch/arm/mach-imx/mmdc.c b/arch/arm/mach-imx/mmdc.c
> index 89a926f..7826289 100644
> --- a/arch/arm/mach-imx/mmdc.c
> +++ b/arch/arm/mach-imx/mmdc.c
> @@ -1,4 +1,5 @@
> /*
> + * Copyright 2017 NXP
> * Copyright 2011,2016 Freescale Semiconductor, Inc.
> * Copyright 2011 Linaro Ltd.
> *
> @@ -47,6 +48,7 @@
> #define PROFILE_SEL 0x10
>
> #define MMDC_MADPCR0 0x410
> +#define MMDC_MADPCR1 0x414
> #define MMDC_MADPSR0 0x418
> #define MMDC_MADPSR1 0x41C
> #define MMDC_MADPSR2 0x420
> @@ -57,6 +59,7 @@
> #define MMDC_NUM_COUNTERS 6
>
> #define MMDC_FLAG_PROFILE_SEL 0x1
> +#define MMDC_PRF_AXI_ID_CLEAR 0x0
>
> #define to_mmdc_pmu(p) container_of(p, struct mmdc_pmu, pmu)
>
> @@ -161,8 +164,11 @@ static struct attribute_group mmdc_pmu_events_attr_group
> = {
> };
>
> PMU_FORMAT_ATTR(event, "config:0-63");
> +PMU_FORMAT_ATTR(axi_id, "config1:0-63");
> +
> static struct attribute *mmdc_pmu_format_attrs[] = {
> &format_attr_event.attr,
> + &format_attr_axi_id.attr,
> NULL,
> };
>
> @@ -345,6 +351,14 @@ static void mmdc_pmu_event_start(struct perf_event
> *event, int flags)
>
> writel(DBG_RST, reg);
>
> + /*
> + * Write the AXI id parameter to MADPCR1.
> + */
> + val = event->attr.config1;
> + reg = mmdc_base + MMDC_MADPCR1;
> + writel(val, reg);
> +
> + reg = mmdc_base + MMDC_MADPCR0;
> val = DBG_EN;
> if (pmu_mmdc->devtype_data->flags & MMDC_FLAG_PROFILE_SEL)
> val |= PROFILE_SEL;
> @@ -382,6 +396,10 @@ static void mmdc_pmu_event_stop(struct perf_event
> *event, int flags)
> reg = mmdc_base + MMDC_MADPCR0;
>
> writel(PRF_FRZ, reg);
> +
> + reg = mmdc_base + MMDC_MADPCR1;
> + writel(MMDC_PRF_AXI_ID_CLEAR, reg);
> +
> mmdc_pmu_event_update(event);
> }
>
> --
> 2.7.4
>
