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ARM: imx: Add AXI address filter support for MMDC profiling 

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.breana@nxp.com>
Acked-by: Frank Li <Frank.li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Tiberiu Breana 2017-02-15 14:00:26 +02:00 committed by Shawn Guo
parent 579616bac1
commit 55edcbb2db
1 changed files with 18 additions and 0 deletions
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18
arch/arm/mach-imx/mmdc.c
View File

@ -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);
}