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perf: fsl_imx8_ddr: Add AXI ID PORT CHANNEL filter support

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This is the extension of AXI ID filter.

Filter is defined with 2 configuration registers per counter 1-3 (counter
0 is not used for filtering and lacks these registers).
* Counter N MASK COMP register - AXI_ID and AXI_MASKING.
* Counter N MUX CNTL register - AXI CHANNEL and AXI PORT.
  -- 0: address channel
  -- 1: data channel

This filter is exposed to userspace as an additional (channel, port) pair.
The definition of axi_channel is inverted in userspace, and it will be
reverted in driver automatically.

AXI filter of Perf Monitor in DDR Subsystem, only a single port0 exist, so
axi_port is reserved which should be 0.

e.g.
perf stat -a -e imx8_ddr0/axid-read,axi_mask=0xMMMM,axi_id=0xDDDD,axi_channel=0xH/ cmd
perf stat -a -e imx8_ddr0/axid-write,axi_mask=0xMMMM,axi_id=0xDDDD,axi_channel=0xH/ cmd

Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20231120093317.2652866-1-xu.yang_2@nxp.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Xu Yang 2023-11-20 17:33:13 +08:00 committed by Will Deacon
parent 118eb89b1e
commit afd83967e7
1 changed files with 39 additions and 0 deletions
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39
drivers/perf/fsl_imx8_ddr_perf.c
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@ -19,6 +19,8 @@
#define COUNTER_READ 0x20
#define COUNTER_DPCR1 0x30
#define COUNTER_MUX_CNTL 0x50
#define COUNTER_MASK_COMP 0x54
#define CNTL_OVER 0x1
#define CNTL_CLEAR 0x2
@ -32,6 +34,13 @@
#define CNTL_CSV_SHIFT 24
#define CNTL_CSV_MASK (0xFFU << CNTL_CSV_SHIFT)
#define READ_PORT_SHIFT 0
#define READ_PORT_MASK (0x7 << READ_PORT_SHIFT)
#define READ_CHANNEL_REVERT 0x00000008 /* bit 3 for read channel select */
#define WRITE_PORT_SHIFT 8
#define WRITE_PORT_MASK (0x7 << WRITE_PORT_SHIFT)
#define WRITE_CHANNEL_REVERT 0x00000800 /* bit 11 for write channel select */
#define EVENT_CYCLES_ID 0
#define EVENT_CYCLES_COUNTER 0
#define NUM_COUNTERS 4
@ -50,6 +59,7 @@ static DEFINE_IDA(ddr_ida);
/* DDR Perf hardware feature */
#define DDR_CAP_AXI_ID_FILTER 0x1 /* support AXI ID filter */
#define DDR_CAP_AXI_ID_FILTER_ENHANCED 0x3 /* support enhanced AXI ID filter */
#define DDR_CAP_AXI_ID_PORT_CHANNEL_FILTER 0x4 /* support AXI ID PORT CHANNEL filter */
struct fsl_ddr_devtype_data {
unsigned int quirks; /* quirks needed for different DDR Perf core */
@ -144,6 +154,7 @@ static const struct attribute_group ddr_perf_identifier_attr_group = {
enum ddr_perf_filter_capabilities {
PERF_CAP_AXI_ID_FILTER = 0,
PERF_CAP_AXI_ID_FILTER_ENHANCED,
PERF_CAP_AXI_ID_PORT_CHANNEL_FILTER,
PERF_CAP_AXI_ID_FEAT_MAX,
};
@ -157,6 +168,8 @@ static u32 ddr_perf_filter_cap_get(struct ddr_pmu *pmu, int cap)
case PERF_CAP_AXI_ID_FILTER_ENHANCED:
quirks &= DDR_CAP_AXI_ID_FILTER_ENHANCED;
return quirks == DDR_CAP_AXI_ID_FILTER_ENHANCED;
case PERF_CAP_AXI_ID_PORT_CHANNEL_FILTER:
return !!(quirks & DDR_CAP_AXI_ID_PORT_CHANNEL_FILTER);
default:
WARN(1, "unknown filter cap %d\n", cap);
}
@ -187,6 +200,7 @@ static ssize_t ddr_perf_filter_cap_show(struct device *dev,
static struct attribute *ddr_perf_filter_cap_attr[] = {
PERF_FILTER_EXT_ATTR_ENTRY(filter, PERF_CAP_AXI_ID_FILTER),
PERF_FILTER_EXT_ATTR_ENTRY(enhanced_filter, PERF_CAP_AXI_ID_FILTER_ENHANCED),
PERF_FILTER_EXT_ATTR_ENTRY(super_filter, PERF_CAP_AXI_ID_PORT_CHANNEL_FILTER),
NULL,
};
@ -272,11 +286,15 @@ static const struct attribute_group ddr_perf_events_attr_group = {
PMU_FORMAT_ATTR(event, "config:0-7");
PMU_FORMAT_ATTR(axi_id, "config1:0-15");
PMU_FORMAT_ATTR(axi_mask, "config1:16-31");
PMU_FORMAT_ATTR(axi_port, "config2:0-2");
PMU_FORMAT_ATTR(axi_channel, "config2:3-3");
static struct attribute *ddr_perf_format_attrs[] = {
&format_attr_event.attr,
&format_attr_axi_id.attr,
&format_attr_axi_mask.attr,
&format_attr_axi_port.attr,
&format_attr_axi_channel.attr,
NULL,
};
@ -530,6 +548,7 @@ static int ddr_perf_event_add(struct perf_event *event, int flags)
int counter;
int cfg = event->attr.config;
int cfg1 = event->attr.config1;
int cfg2 = event->attr.config2;
if (pmu->devtype_data->quirks & DDR_CAP_AXI_ID_FILTER) {
int i;
@ -553,6 +572,26 @@ static int ddr_perf_event_add(struct perf_event *event, int flags)
return -EOPNOTSUPP;
}
if (pmu->devtype_data->quirks & DDR_CAP_AXI_ID_PORT_CHANNEL_FILTER) {
if (ddr_perf_is_filtered(event)) {
/* revert axi id masking(axi_mask) value */
cfg1 ^= AXI_MASKING_REVERT;
writel(cfg1, pmu->base + COUNTER_MASK_COMP + ((counter - 1) << 4));
if (cfg == 0x41) {
/* revert axi read channel(axi_channel) value */
cfg2 ^= READ_CHANNEL_REVERT;
cfg2 |= FIELD_PREP(READ_PORT_MASK, cfg2);
} else {
/* revert axi write channel(axi_channel) value */
cfg2 ^= WRITE_CHANNEL_REVERT;
cfg2 |= FIELD_PREP(WRITE_PORT_MASK, cfg2);
}
writel(cfg2, pmu->base + COUNTER_MUX_CNTL + ((counter - 1) << 4));
}
}
pmu->events[counter] = event;
hwc->idx = counter;