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a428eb4b99
linux/drivers/perf/arm-cmn.c
Robin Murphy a428eb4b99 Partially revert "perf/arm-cmn: Optimise DTC counter accesses" 
It turns out the optimisation implemented by commit 4f2c3872dd is
totally broken, since all the places that consume hw->dtcs_used for
events other than cycle count are still not expecting it to be sparsely
populated, and fail to read all the relevant DTC counters correctly if
so.

If implemented correctly, the optimisation potentially saves up to 3
register reads per event update, which is reasonably significant for
events targeting a single node, but still not worth a massive amount of
additional code complexity overall. Getting it right within the current
design looks a fair bit more involved than it was ever intended to be,
so let's just make a functional revert which restores the old behaviour
while still backporting easily.

Fixes: 4f2c3872dd ("perf/arm-cmn: Optimise DTC counter accesses")
Reported-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/b41bb4ed7283c3d8400ce5cf5e6ec94915e6750f.1674498637.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
2023-01-26 13:55:38 +00:00

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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2016-2020 Arm Limited
// CMN-600 Coherent Mesh Network PMU driver
#include <linux/acpi.h>
#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/debugfs.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/perf_event.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/sort.h>
/* Common register stuff */
#define CMN_NODE_INFO 0x0000
#define CMN_NI_NODE_TYPE GENMASK_ULL(15, 0)
#define CMN_NI_NODE_ID GENMASK_ULL(31, 16)
#define CMN_NI_LOGICAL_ID GENMASK_ULL(47, 32)
#define CMN_NODEID_DEVID(reg) ((reg) & 3)
#define CMN_NODEID_EXT_DEVID(reg) ((reg) & 1)
#define CMN_NODEID_PID(reg) (((reg) >> 2) & 1)
#define CMN_NODEID_EXT_PID(reg) (((reg) >> 1) & 3)
#define CMN_NODEID_1x1_PID(reg) (((reg) >> 2) & 7)
#define CMN_NODEID_X(reg, bits) ((reg) >> (3 + (bits)))
#define CMN_NODEID_Y(reg, bits) (((reg) >> 3) & ((1U << (bits)) - 1))
#define CMN_CHILD_INFO 0x0080
#define CMN_CI_CHILD_COUNT GENMASK_ULL(15, 0)
#define CMN_CI_CHILD_PTR_OFFSET GENMASK_ULL(31, 16)
#define CMN_CHILD_NODE_ADDR GENMASK(29, 0)
#define CMN_CHILD_NODE_EXTERNAL BIT(31)
#define CMN_MAX_DIMENSION 12
#define CMN_MAX_XPS (CMN_MAX_DIMENSION * CMN_MAX_DIMENSION)
#define CMN_MAX_DTMS (CMN_MAX_XPS + (CMN_MAX_DIMENSION - 1) * 4)
/* The CFG node has various info besides the discovery tree */
#define CMN_CFGM_PERIPH_ID_2 0x0010
#define CMN_CFGM_PID2_REVISION GENMASK(7, 4)
#define CMN_CFGM_INFO_GLOBAL 0x900
#define CMN_INFO_MULTIPLE_DTM_EN BIT_ULL(63)
#define CMN_INFO_RSP_VC_NUM GENMASK_ULL(53, 52)
#define CMN_INFO_DAT_VC_NUM GENMASK_ULL(51, 50)
#define CMN_CFGM_INFO_GLOBAL_1 0x908
#define CMN_INFO_SNP_VC_NUM GENMASK_ULL(3, 2)
#define CMN_INFO_REQ_VC_NUM GENMASK_ULL(1, 0)
/* XPs also have some local topology info which has uses too */
#define CMN_MXP__CONNECT_INFO_P0 0x0008
#define CMN_MXP__CONNECT_INFO_P1 0x0010
#define CMN_MXP__CONNECT_INFO_P2 0x0028
#define CMN_MXP__CONNECT_INFO_P3 0x0030
#define CMN_MXP__CONNECT_INFO_P4 0x0038
#define CMN_MXP__CONNECT_INFO_P5 0x0040
#define CMN__CONNECT_INFO_DEVICE_TYPE GENMASK_ULL(4, 0)
/* PMU registers occupy the 3rd 4KB page of each node's region */
#define CMN_PMU_OFFSET 0x2000
/* For most nodes, this is all there is */
#define CMN_PMU_EVENT_SEL 0x000
#define CMN__PMU_CBUSY_SNTHROTTLE_SEL GENMASK_ULL(44, 42)
#define CMN__PMU_CLASS_OCCUP_ID GENMASK_ULL(36, 35)
/* Technically this is 4 bits wide on DNs, but we only use 2 there anyway */
#define CMN__PMU_OCCUP1_ID GENMASK_ULL(34, 32)
/* HN-Ps are weird... */
#define CMN_HNP_PMU_EVENT_SEL 0x008
/* DTMs live in the PMU space of XP registers */
#define CMN_DTM_WPn(n) (0x1A0 + (n) * 0x18)
#define CMN_DTM_WPn_CONFIG(n) (CMN_DTM_WPn(n) + 0x00)
#define CMN_DTM_WPn_CONFIG_WP_CHN_NUM GENMASK_ULL(20, 19)
#define CMN_DTM_WPn_CONFIG_WP_DEV_SEL2 GENMASK_ULL(18, 17)
#define CMN_DTM_WPn_CONFIG_WP_COMBINE BIT(9)
#define CMN_DTM_WPn_CONFIG_WP_EXCLUSIVE BIT(8)
#define CMN600_WPn_CONFIG_WP_COMBINE BIT(6)
#define CMN600_WPn_CONFIG_WP_EXCLUSIVE BIT(5)
#define CMN_DTM_WPn_CONFIG_WP_GRP GENMASK_ULL(5, 4)
#define CMN_DTM_WPn_CONFIG_WP_CHN_SEL GENMASK_ULL(3, 1)
#define CMN_DTM_WPn_CONFIG_WP_DEV_SEL BIT(0)
#define CMN_DTM_WPn_VAL(n) (CMN_DTM_WPn(n) + 0x08)
#define CMN_DTM_WPn_MASK(n) (CMN_DTM_WPn(n) + 0x10)
#define CMN_DTM_PMU_CONFIG 0x210
#define CMN__PMEVCNT0_INPUT_SEL GENMASK_ULL(37, 32)
#define CMN__PMEVCNT0_INPUT_SEL_WP 0x00
#define CMN__PMEVCNT0_INPUT_SEL_XP 0x04
#define CMN__PMEVCNT0_INPUT_SEL_DEV 0x10
#define CMN__PMEVCNT0_GLOBAL_NUM GENMASK_ULL(18, 16)
#define CMN__PMEVCNTn_GLOBAL_NUM_SHIFT(n) ((n) * 4)
#define CMN__PMEVCNT_PAIRED(n) BIT(4 + (n))
#define CMN__PMEVCNT23_COMBINED BIT(2)
#define CMN__PMEVCNT01_COMBINED BIT(1)
#define CMN_DTM_PMU_CONFIG_PMU_EN BIT(0)
#define CMN_DTM_PMEVCNT 0x220
#define CMN_DTM_PMEVCNTSR 0x240
#define CMN_DTM_UNIT_INFO 0x0910
#define CMN_DTM_NUM_COUNTERS 4
/* Want more local counters? Why not replicate the whole DTM! Ugh... */
#define CMN_DTM_OFFSET(n) ((n) * 0x200)
/* The DTC node is where the magic happens */
#define CMN_DT_DTC_CTL 0x0a00
#define CMN_DT_DTC_CTL_DT_EN BIT(0)
/* DTC counters are paired in 64-bit registers on a 16-byte stride. Yuck */
#define _CMN_DT_CNT_REG(n) ((((n) / 2) * 4 + (n) % 2) * 4)
#define CMN_DT_PMEVCNT(n) (CMN_PMU_OFFSET + _CMN_DT_CNT_REG(n))
#define CMN_DT_PMCCNTR (CMN_PMU_OFFSET + 0x40)
#define CMN_DT_PMEVCNTSR(n) (CMN_PMU_OFFSET + 0x50 + _CMN_DT_CNT_REG(n))
#define CMN_DT_PMCCNTRSR (CMN_PMU_OFFSET + 0x90)
#define CMN_DT_PMCR (CMN_PMU_OFFSET + 0x100)
#define CMN_DT_PMCR_PMU_EN BIT(0)
#define CMN_DT_PMCR_CNTR_RST BIT(5)
#define CMN_DT_PMCR_OVFL_INTR_EN BIT(6)
#define CMN_DT_PMOVSR (CMN_PMU_OFFSET + 0x118)
#define CMN_DT_PMOVSR_CLR (CMN_PMU_OFFSET + 0x120)
#define CMN_DT_PMSSR (CMN_PMU_OFFSET + 0x128)
#define CMN_DT_PMSSR_SS_STATUS(n) BIT(n)
#define CMN_DT_PMSRR (CMN_PMU_OFFSET + 0x130)
#define CMN_DT_PMSRR_SS_REQ BIT(0)
#define CMN_DT_NUM_COUNTERS 8
#define CMN_MAX_DTCS 4
/*
* Even in the worst case a DTC counter can't wrap in fewer than 2^42 cycles,
* so throwing away one bit to make overflow handling easy is no big deal.
*/
#define CMN_COUNTER_INIT 0x80000000
/* Similarly for the 40-bit cycle counter */
#define CMN_CC_INIT 0x8000000000ULL
/* Event attributes */
#define CMN_CONFIG_TYPE GENMASK_ULL(15, 0)
#define CMN_CONFIG_EVENTID GENMASK_ULL(26, 16)
#define CMN_CONFIG_OCCUPID GENMASK_ULL(30, 27)
#define CMN_CONFIG_BYNODEID BIT_ULL(31)
#define CMN_CONFIG_NODEID GENMASK_ULL(47, 32)
#define CMN_EVENT_TYPE(event) FIELD_GET(CMN_CONFIG_TYPE, (event)->attr.config)
#define CMN_EVENT_EVENTID(event) FIELD_GET(CMN_CONFIG_EVENTID, (event)->attr.config)
#define CMN_EVENT_OCCUPID(event) FIELD_GET(CMN_CONFIG_OCCUPID, (event)->attr.config)
#define CMN_EVENT_BYNODEID(event) FIELD_GET(CMN_CONFIG_BYNODEID, (event)->attr.config)
#define CMN_EVENT_NODEID(event) FIELD_GET(CMN_CONFIG_NODEID, (event)->attr.config)
#define CMN_CONFIG_WP_COMBINE GENMASK_ULL(27, 24)
#define CMN_CONFIG_WP_DEV_SEL GENMASK_ULL(50, 48)
#define CMN_CONFIG_WP_CHN_SEL GENMASK_ULL(55, 51)
/* Note that we don't yet support the tertiary match group on newer IPs */
#define CMN_CONFIG_WP_GRP BIT_ULL(56)
#define CMN_CONFIG_WP_EXCLUSIVE BIT_ULL(57)
#define CMN_CONFIG1_WP_VAL GENMASK_ULL(63, 0)
#define CMN_CONFIG2_WP_MASK GENMASK_ULL(63, 0)
#define CMN_EVENT_WP_COMBINE(event) FIELD_GET(CMN_CONFIG_WP_COMBINE, (event)->attr.config)
#define CMN_EVENT_WP_DEV_SEL(event) FIELD_GET(CMN_CONFIG_WP_DEV_SEL, (event)->attr.config)
#define CMN_EVENT_WP_CHN_SEL(event) FIELD_GET(CMN_CONFIG_WP_CHN_SEL, (event)->attr.config)
#define CMN_EVENT_WP_GRP(event) FIELD_GET(CMN_CONFIG_WP_GRP, (event)->attr.config)
#define CMN_EVENT_WP_EXCLUSIVE(event) FIELD_GET(CMN_CONFIG_WP_EXCLUSIVE, (event)->attr.config)
#define CMN_EVENT_WP_VAL(event) FIELD_GET(CMN_CONFIG1_WP_VAL, (event)->attr.config1)
#define CMN_EVENT_WP_MASK(event) FIELD_GET(CMN_CONFIG2_WP_MASK, (event)->attr.config2)
/* Made-up event IDs for watchpoint direction */
#define CMN_WP_UP 0
#define CMN_WP_DOWN 2
enum cmn_model {
CMN600 = 1,
CMN650 = 2,
CMN700 = 4,
CI700 = 8,
/* ...and then we can use bitmap tricks for commonality */
CMN_ANY = -1,
NOT_CMN600 = -2,
CMN_650ON = CMN650 | CMN700,
};
/* CMN-600 r0px shouldn't exist in silicon, thankfully */
enum cmn_revision {
CMN600_R1P0,
CMN600_R1P1,
CMN600_R1P2,
CMN600_R1P3,
CMN600_R2P0,
CMN600_R3P0,
CMN600_R3P1,
CMN650_R0P0 = 0,
CMN650_R1P0,
CMN650_R1P1,
CMN650_R2P0,
CMN650_R1P2,
CMN700_R0P0 = 0,
CMN700_R1P0,
CMN700_R2P0,
CI700_R0P0 = 0,
CI700_R1P0,
CI700_R2P0,
};
enum cmn_node_type {
CMN_TYPE_INVALID,
CMN_TYPE_DVM,
CMN_TYPE_CFG,
CMN_TYPE_DTC,
CMN_TYPE_HNI,
CMN_TYPE_HNF,
CMN_TYPE_XP,
CMN_TYPE_SBSX,
CMN_TYPE_MPAM_S,
CMN_TYPE_MPAM_NS,
CMN_TYPE_RNI,
CMN_TYPE_RND = 0xd,
CMN_TYPE_RNSAM = 0xf,
CMN_TYPE_MTSX,
CMN_TYPE_HNP,
CMN_TYPE_CXRA = 0x100,
CMN_TYPE_CXHA,
CMN_TYPE_CXLA,
CMN_TYPE_CCRA,
CMN_TYPE_CCHA,
CMN_TYPE_CCLA,
CMN_TYPE_CCLA_RNI,
/* Not a real node type */
CMN_TYPE_WP = 0x7770
};
enum cmn_filter_select {
SEL_NONE = -1,
SEL_OCCUP1ID,
SEL_CLASS_OCCUP_ID,
SEL_CBUSY_SNTHROTTLE_SEL,
SEL_MAX
};
struct arm_cmn_node {
void __iomem *pmu_base;
u16 id, logid;
enum cmn_node_type type;
int dtm;
union {
/* DN/HN-F/CXHA */
struct {
u8 val : 4;
u8 count : 4;
} occupid[SEL_MAX];
/* XP */
u8 dtc;
};
union {
u8 event[4];
__le32 event_sel;
u16 event_w[4];
__le64 event_sel_w;
};
};
struct arm_cmn_dtm {
void __iomem *base;
u32 pmu_config_low;
union {
u8 input_sel[4];
__le32 pmu_config_high;
};
s8 wp_event[4];
};
struct arm_cmn_dtc {
void __iomem *base;
int irq;
int irq_friend;
bool cc_active;
struct perf_event *counters[CMN_DT_NUM_COUNTERS];
struct perf_event *cycles;
};
#define CMN_STATE_DISABLED BIT(0)
#define CMN_STATE_TXN BIT(1)
struct arm_cmn {
struct device *dev;
void __iomem *base;
unsigned int state;
enum cmn_revision rev;
enum cmn_model model;
u8 mesh_x;
u8 mesh_y;
u16 num_xps;
u16 num_dns;
bool multi_dtm;
u8 ports_used;
struct {
unsigned int rsp_vc_num : 2;
unsigned int dat_vc_num : 2;
unsigned int snp_vc_num : 2;
unsigned int req_vc_num : 2;
};
struct arm_cmn_node *xps;
struct arm_cmn_node *dns;
struct arm_cmn_dtm *dtms;
struct arm_cmn_dtc *dtc;
unsigned int num_dtcs;
int cpu;
struct hlist_node cpuhp_node;
struct pmu pmu;
struct dentry *debug;
};
#define to_cmn(p) container_of(p, struct arm_cmn, pmu)
static int arm_cmn_hp_state;
struct arm_cmn_nodeid {
u8 x;
u8 y;
u8 port;
u8 dev;
};
static int arm_cmn_xyidbits(const struct arm_cmn *cmn)
{
return fls((cmn->mesh_x - 1) | (cmn->mesh_y - 1) | 2);
}
static struct arm_cmn_nodeid arm_cmn_nid(const struct arm_cmn *cmn, u16 id)
{
struct arm_cmn_nodeid nid;
if (cmn->num_xps == 1) {
nid.x = 0;
nid.y = 0;
nid.port = CMN_NODEID_1x1_PID(id);
nid.dev = CMN_NODEID_DEVID(id);
} else {
int bits = arm_cmn_xyidbits(cmn);
nid.x = CMN_NODEID_X(id, bits);
nid.y = CMN_NODEID_Y(id, bits);
if (cmn->ports_used & 0xc) {
nid.port = CMN_NODEID_EXT_PID(id);
nid.dev = CMN_NODEID_EXT_DEVID(id);
} else {
nid.port = CMN_NODEID_PID(id);
nid.dev = CMN_NODEID_DEVID(id);
}
}
return nid;
}
static struct arm_cmn_node *arm_cmn_node_to_xp(const struct arm_cmn *cmn,
const struct arm_cmn_node *dn)
{
struct arm_cmn_nodeid nid = arm_cmn_nid(cmn, dn->id);
int xp_idx = cmn->mesh_x * nid.y + nid.x;
return cmn->xps + xp_idx;
}
static struct arm_cmn_node *arm_cmn_node(const struct arm_cmn *cmn,
enum cmn_node_type type)
{
struct arm_cmn_node *dn;
for (dn = cmn->dns; dn->type; dn++)
if (dn->type == type)
return dn;
return NULL;
}
static struct dentry *arm_cmn_debugfs;
#ifdef CONFIG_DEBUG_FS
static const char *arm_cmn_device_type(u8 type)
{
switch(FIELD_GET(CMN__CONNECT_INFO_DEVICE_TYPE, type)) {
case 0x00: return " |";
case 0x01: return " RN-I |";
case 0x02: return " RN-D |";
case 0x04: return " RN-F_B |";
case 0x05: return "RN-F_B_E|";
case 0x06: return " RN-F_A |";
case 0x07: return "RN-F_A_E|";
case 0x08: return " HN-T |";
case 0x09: return " HN-I |";
case 0x0a: return " HN-D |";
case 0x0b: return " HN-P |";
case 0x0c: return " SN-F |";
case 0x0d: return " SBSX |";
case 0x0e: return " HN-F |";
case 0x0f: return " SN-F_E |";
case 0x10: return " SN-F_D |";
case 0x11: return " CXHA |";
case 0x12: return " CXRA |";
case 0x13: return " CXRH |";
case 0x14: return " RN-F_D |";
case 0x15: return "RN-F_D_E|";
case 0x16: return " RN-F_C |";
case 0x17: return "RN-F_C_E|";
case 0x18: return " RN-F_E |";
case 0x19: return "RN-F_E_E|";
case 0x1c: return " MTSX |";
case 0x1d: return " HN-V |";
case 0x1e: return " CCG |";
default: return " ???? |";
}
}
static void arm_cmn_show_logid(struct seq_file *s, int x, int y, int p, int d)
{
struct arm_cmn *cmn = s->private;
struct arm_cmn_node *dn;
for (dn = cmn->dns; dn->type; dn++) {
struct arm_cmn_nodeid nid = arm_cmn_nid(cmn, dn->id);
if (dn->type == CMN_TYPE_XP)
continue;
/* Ignore the extra components that will overlap on some ports */
if (dn->type < CMN_TYPE_HNI)
continue;
if (nid.x != x || nid.y != y || nid.port != p || nid.dev != d)
continue;
seq_printf(s, " #%-2d |", dn->logid);
return;
}
seq_puts(s, " |");
}
static int arm_cmn_map_show(struct seq_file *s, void *data)
{
struct arm_cmn *cmn = s->private;
int x, y, p, pmax = fls(cmn->ports_used);
seq_puts(s, " X");
for (x = 0; x < cmn->mesh_x; x++)
seq_printf(s, " %d ", x);
seq_puts(s, "\nY P D+");
y = cmn->mesh_y;
while (y--) {
int xp_base = cmn->mesh_x * y;
u8 port[6][CMN_MAX_DIMENSION];
for (x = 0; x < cmn->mesh_x; x++)
seq_puts(s, "--------+");
seq_printf(s, "\n%d |", y);
for (x = 0; x < cmn->mesh_x; x++) {
struct arm_cmn_node *xp = cmn->xps + xp_base + x;
void __iomem *base = xp->pmu_base - CMN_PMU_OFFSET;
port[0][x] = readl_relaxed(base + CMN_MXP__CONNECT_INFO_P0);
port[1][x] = readl_relaxed(base + CMN_MXP__CONNECT_INFO_P1);
port[2][x] = readl_relaxed(base + CMN_MXP__CONNECT_INFO_P2);
port[3][x] = readl_relaxed(base + CMN_MXP__CONNECT_INFO_P3);
port[4][x] = readl_relaxed(base + CMN_MXP__CONNECT_INFO_P4);
port[5][x] = readl_relaxed(base + CMN_MXP__CONNECT_INFO_P5);
seq_printf(s, " XP #%-2d |", xp_base + x);
}
seq_puts(s, "\n |");
for (x = 0; x < cmn->mesh_x; x++) {
u8 dtc = cmn->xps[xp_base + x].dtc;
if (dtc & (dtc - 1))
seq_puts(s, " DTC ?? |");
else
seq_printf(s, " DTC %ld |", __ffs(dtc));
}
seq_puts(s, "\n |");
for (x = 0; x < cmn->mesh_x; x++)
seq_puts(s, "........|");
for (p = 0; p < pmax; p++) {
seq_printf(s, "\n %d |", p);
for (x = 0; x < cmn->mesh_x; x++)
seq_puts(s, arm_cmn_device_type(port[p][x]));
seq_puts(s, "\n 0|");
for (x = 0; x < cmn->mesh_x; x++)
arm_cmn_show_logid(s, x, y, p, 0);
seq_puts(s, "\n 1|");
for (x = 0; x < cmn->mesh_x; x++)
arm_cmn_show_logid(s, x, y, p, 1);
}
seq_puts(s, "\n-----+");
}
for (x = 0; x < cmn->mesh_x; x++)
seq_puts(s, "--------+");
seq_puts(s, "\n");
return 0;
}
DEFINE_SHOW_ATTRIBUTE(arm_cmn_map);
static void arm_cmn_debugfs_init(struct arm_cmn *cmn, int id)
{
const char *name = "map";
if (id > 0)
name = devm_kasprintf(cmn->dev, GFP_KERNEL, "map_%d", id);
if (!name)
return;
cmn->debug = debugfs_create_file(name, 0444, arm_cmn_debugfs, cmn, &arm_cmn_map_fops);
}
#else
static void arm_cmn_debugfs_init(struct arm_cmn *cmn, int id) {}
#endif
struct arm_cmn_hw_event {
struct arm_cmn_node *dn;
u64 dtm_idx[4];
unsigned int dtc_idx;
u8 dtcs_used;
u8 num_dns;
u8 dtm_offset;
bool wide_sel;
enum cmn_filter_select filter_sel;
};
#define for_each_hw_dn(hw, dn, i) \
for (i = 0, dn = hw->dn; i < hw->num_dns; i++, dn++)
static struct arm_cmn_hw_event *to_cmn_hw(struct perf_event *event)
{
BUILD_BUG_ON(sizeof(struct arm_cmn_hw_event) > offsetof(struct hw_perf_event, target));
return (struct arm_cmn_hw_event *)&event->hw;
}
static void arm_cmn_set_index(u64 x[], unsigned int pos, unsigned int val)
{
x[pos / 32] |= (u64)val << ((pos % 32) * 2);
}
static unsigned int arm_cmn_get_index(u64 x[], unsigned int pos)
{
return (x[pos / 32] >> ((pos % 32) * 2)) & 3;
}
struct arm_cmn_event_attr {
struct device_attribute attr;
enum cmn_model model;
enum cmn_node_type type;
enum cmn_filter_select fsel;
u16 eventid;
u8 occupid;
};
struct arm_cmn_format_attr {
struct device_attribute attr;
u64 field;
int config;
};
#define _CMN_EVENT_ATTR(_model, _name, _type, _eventid, _occupid, _fsel)\
(&((struct arm_cmn_event_attr[]) {{ \
.attr = __ATTR(_name, 0444, arm_cmn_event_show, NULL), \
.model = _model, \
.type = _type, \
.eventid = _eventid, \
.occupid = _occupid, \
.fsel = _fsel, \
}})[0].attr.attr)
#define CMN_EVENT_ATTR(_model, _name, _type, _eventid) \
_CMN_EVENT_ATTR(_model, _name, _type, _eventid, 0, SEL_NONE)
static ssize_t arm_cmn_event_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct arm_cmn_event_attr *eattr;
eattr = container_of(attr, typeof(*eattr), attr);
if (eattr->type == CMN_TYPE_DTC)
return sysfs_emit(buf, "type=0x%x\n", eattr->type);
if (eattr->type == CMN_TYPE_WP)
return sysfs_emit(buf,
"type=0x%x,eventid=0x%x,wp_dev_sel=?,wp_chn_sel=?,wp_grp=?,wp_val=?,wp_mask=?\n",
eattr->type, eattr->eventid);
if (eattr->fsel > SEL_NONE)
return sysfs_emit(buf, "type=0x%x,eventid=0x%x,occupid=0x%x\n",
eattr->type, eattr->eventid, eattr->occupid);
return sysfs_emit(buf, "type=0x%x,eventid=0x%x\n", eattr->type,
eattr->eventid);
}
static umode_t arm_cmn_event_attr_is_visible(struct kobject *kobj,
struct attribute *attr,
int unused)
{
struct device *dev = kobj_to_dev(kobj);
struct arm_cmn *cmn = to_cmn(dev_get_drvdata(dev));
struct arm_cmn_event_attr *eattr;
enum cmn_node_type type;
u16 eventid;
eattr = container_of(attr, typeof(*eattr), attr.attr);
if (!(eattr->model & cmn->model))
return 0;
type = eattr->type;
eventid = eattr->eventid;
/* Watchpoints aren't nodes, so avoid confusion */
if (type == CMN_TYPE_WP)
return attr->mode;
/* Hide XP events for unused interfaces/channels */
if (type == CMN_TYPE_XP) {
unsigned int intf = (eventid >> 2) & 7;
unsigned int chan = eventid >> 5;
if ((intf & 4) && !(cmn->ports_used & BIT(intf & 3)))
return 0;
if (chan == 4 && cmn->model == CMN600)
return 0;
if ((chan == 5 && cmn->rsp_vc_num < 2) ||
(chan == 6 && cmn->dat_vc_num < 2) ||
(chan == 7 && cmn->snp_vc_num < 2) ||
(chan == 8 && cmn->req_vc_num < 2))
return 0;
}
/* Revision-specific differences */
if (cmn->model == CMN600) {
if (cmn->rev < CMN600_R1P3) {
if (type == CMN_TYPE_CXRA && eventid > 0x10)
return 0;
}
if (cmn->rev < CMN600_R1P2) {
if (type == CMN_TYPE_HNF && eventid == 0x1b)
return 0;
if (type == CMN_TYPE_CXRA || type == CMN_TYPE_CXHA)
return 0;
}
} else if (cmn->model == CMN650) {
if (cmn->rev < CMN650_R2P0 || cmn->rev == CMN650_R1P2) {
if (type == CMN_TYPE_HNF && eventid > 0x22)
return 0;
if (type == CMN_TYPE_SBSX && eventid == 0x17)
return 0;
if (type == CMN_TYPE_RNI && eventid > 0x10)
return 0;
}
} else if (cmn->model == CMN700) {
if (cmn->rev < CMN700_R2P0) {
if (type == CMN_TYPE_HNF && eventid > 0x2c)
return 0;
if (type == CMN_TYPE_CCHA && eventid > 0x74)
return 0;
if (type == CMN_TYPE_CCLA && eventid > 0x27)
return 0;
}
if (cmn->rev < CMN700_R1P0) {
if (type == CMN_TYPE_HNF && eventid > 0x2b)
return 0;
}
}
if (!arm_cmn_node(cmn, type))
return 0;
return attr->mode;
}
#define _CMN_EVENT_DVM(_model, _name, _event, _occup, _fsel) \
_CMN_EVENT_ATTR(_model, dn_##_name, CMN_TYPE_DVM, _event, _occup, _fsel)
#define CMN_EVENT_DTC(_name) \
CMN_EVENT_ATTR(CMN_ANY, dtc_##_name, CMN_TYPE_DTC, 0)
#define _CMN_EVENT_HNF(_model, _name, _event, _occup, _fsel) \
_CMN_EVENT_ATTR(_model, hnf_##_name, CMN_TYPE_HNF, _event, _occup, _fsel)
#define CMN_EVENT_HNI(_name, _event) \
CMN_EVENT_ATTR(CMN_ANY, hni_##_name, CMN_TYPE_HNI, _event)
#define CMN_EVENT_HNP(_name, _event) \
CMN_EVENT_ATTR(CMN_ANY, hnp_##_name, CMN_TYPE_HNP, _event)
#define __CMN_EVENT_XP(_name, _event) \
CMN_EVENT_ATTR(CMN_ANY, mxp_##_name, CMN_TYPE_XP, _event)
#define CMN_EVENT_SBSX(_model, _name, _event) \
CMN_EVENT_ATTR(_model, sbsx_##_name, CMN_TYPE_SBSX, _event)
#define CMN_EVENT_RNID(_model, _name, _event) \
CMN_EVENT_ATTR(_model, rnid_##_name, CMN_TYPE_RNI, _event)
#define CMN_EVENT_MTSX(_name, _event) \
CMN_EVENT_ATTR(CMN_ANY, mtsx_##_name, CMN_TYPE_MTSX, _event)
#define CMN_EVENT_CXRA(_model, _name, _event) \
CMN_EVENT_ATTR(_model, cxra_##_name, CMN_TYPE_CXRA, _event)
#define CMN_EVENT_CXHA(_name, _event) \
CMN_EVENT_ATTR(CMN_ANY, cxha_##_name, CMN_TYPE_CXHA, _event)
#define CMN_EVENT_CCRA(_name, _event) \
CMN_EVENT_ATTR(CMN_ANY, ccra_##_name, CMN_TYPE_CCRA, _event)
#define CMN_EVENT_CCHA(_name, _event) \
CMN_EVENT_ATTR(CMN_ANY, ccha_##_name, CMN_TYPE_CCHA, _event)
#define CMN_EVENT_CCLA(_name, _event) \
CMN_EVENT_ATTR(CMN_ANY, ccla_##_name, CMN_TYPE_CCLA, _event)
#define CMN_EVENT_CCLA_RNI(_name, _event) \
CMN_EVENT_ATTR(CMN_ANY, ccla_rni_##_name, CMN_TYPE_CCLA_RNI, _event)
#define CMN_EVENT_DVM(_model, _name, _event) \
_CMN_EVENT_DVM(_model, _name, _event, 0, SEL_NONE)
#define CMN_EVENT_DVM_OCC(_model, _name, _event) \
_CMN_EVENT_DVM(_model, _name##_all, _event, 0, SEL_OCCUP1ID), \
_CMN_EVENT_DVM(_model, _name##_dvmop, _event, 1, SEL_OCCUP1ID), \
_CMN_EVENT_DVM(_model, _name##_dvmsync, _event, 2, SEL_OCCUP1ID)
#define CMN_EVENT_HNF(_model, _name, _event) \
_CMN_EVENT_HNF(_model, _name, _event, 0, SEL_NONE)
#define CMN_EVENT_HNF_CLS(_model, _name, _event) \
_CMN_EVENT_HNF(_model, _name##_class0, _event, 0, SEL_CLASS_OCCUP_ID), \
_CMN_EVENT_HNF(_model, _name##_class1, _event, 1, SEL_CLASS_OCCUP_ID), \
_CMN_EVENT_HNF(_model, _name##_class2, _event, 2, SEL_CLASS_OCCUP_ID), \
_CMN_EVENT_HNF(_model, _name##_class3, _event, 3, SEL_CLASS_OCCUP_ID)
#define CMN_EVENT_HNF_SNT(_model, _name, _event) \
_CMN_EVENT_HNF(_model, _name##_all, _event, 0, SEL_CBUSY_SNTHROTTLE_SEL), \
_CMN_EVENT_HNF(_model, _name##_group0_read, _event, 1, SEL_CBUSY_SNTHROTTLE_SEL), \
_CMN_EVENT_HNF(_model, _name##_group0_write, _event, 2, SEL_CBUSY_SNTHROTTLE_SEL), \
_CMN_EVENT_HNF(_model, _name##_group1_read, _event, 3, SEL_CBUSY_SNTHROTTLE_SEL), \
_CMN_EVENT_HNF(_model, _name##_group1_write, _event, 4, SEL_CBUSY_SNTHROTTLE_SEL), \
_CMN_EVENT_HNF(_model, _name##_read, _event, 5, SEL_CBUSY_SNTHROTTLE_SEL), \
_CMN_EVENT_HNF(_model, _name##_write, _event, 6, SEL_CBUSY_SNTHROTTLE_SEL)
#define _CMN_EVENT_XP(_name, _event) \
__CMN_EVENT_XP(e_##_name, (_event) | (0 << 2)), \
__CMN_EVENT_XP(w_##_name, (_event) | (1 << 2)), \
__CMN_EVENT_XP(n_##_name, (_event) | (2 << 2)), \
__CMN_EVENT_XP(s_##_name, (_event) | (3 << 2)), \
__CMN_EVENT_XP(p0_##_name, (_event) | (4 << 2)), \
__CMN_EVENT_XP(p1_##_name, (_event) | (5 << 2)), \
__CMN_EVENT_XP(p2_##_name, (_event) | (6 << 2)), \
__CMN_EVENT_XP(p3_##_name, (_event) | (7 << 2))
/* Good thing there are only 3 fundamental XP events... */
#define CMN_EVENT_XP(_name, _event) \
_CMN_EVENT_XP(req_##_name, (_event) | (0 << 5)), \
_CMN_EVENT_XP(rsp_##_name, (_event) | (1 << 5)), \
_CMN_EVENT_XP(snp_##_name, (_event) | (2 << 5)), \
_CMN_EVENT_XP(dat_##_name, (_event) | (3 << 5)), \
_CMN_EVENT_XP(pub_##_name, (_event) | (4 << 5)), \
_CMN_EVENT_XP(rsp2_##_name, (_event) | (5 << 5)), \
_CMN_EVENT_XP(dat2_##_name, (_event) | (6 << 5)), \
_CMN_EVENT_XP(snp2_##_name, (_event) | (7 << 5)), \
_CMN_EVENT_XP(req2_##_name, (_event) | (8 << 5))
static struct attribute *arm_cmn_event_attrs[] = {
CMN_EVENT_DTC(cycles),
/*
* DVM node events conflict with HN-I events in the equivalent PMU
* slot, but our lazy short-cut of using the DTM counter index for
* the PMU index as well happens to avoid that by construction.
*/
CMN_EVENT_DVM(CMN600, rxreq_dvmop, 0x01),
CMN_EVENT_DVM(CMN600, rxreq_dvmsync, 0x02),
CMN_EVENT_DVM(CMN600, rxreq_dvmop_vmid_filtered, 0x03),
CMN_EVENT_DVM(CMN600, rxreq_retried, 0x04),
CMN_EVENT_DVM_OCC(CMN600, rxreq_trk_occupancy, 0x05),
CMN_EVENT_DVM(NOT_CMN600, dvmop_tlbi, 0x01),
CMN_EVENT_DVM(NOT_CMN600, dvmop_bpi, 0x02),
CMN_EVENT_DVM(NOT_CMN600, dvmop_pici, 0x03),
CMN_EVENT_DVM(NOT_CMN600, dvmop_vici, 0x04),
CMN_EVENT_DVM(NOT_CMN600, dvmsync, 0x05),
CMN_EVENT_DVM(NOT_CMN600, vmid_filtered, 0x06),
CMN_EVENT_DVM(NOT_CMN600, rndop_filtered, 0x07),
CMN_EVENT_DVM(NOT_CMN600, retry, 0x08),
CMN_EVENT_DVM(NOT_CMN600, txsnp_flitv, 0x09),
CMN_EVENT_DVM(NOT_CMN600, txsnp_stall, 0x0a),
CMN_EVENT_DVM(NOT_CMN600, trkfull, 0x0b),
CMN_EVENT_DVM_OCC(NOT_CMN600, trk_occupancy, 0x0c),
CMN_EVENT_DVM_OCC(CMN700, trk_occupancy_cxha, 0x0d),
CMN_EVENT_DVM_OCC(CMN700, trk_occupancy_pdn, 0x0e),
CMN_EVENT_DVM(CMN700, trk_alloc, 0x0f),
CMN_EVENT_DVM(CMN700, trk_cxha_alloc, 0x10),
CMN_EVENT_DVM(CMN700, trk_pdn_alloc, 0x11),
CMN_EVENT_DVM(CMN700, txsnp_stall_limit, 0x12),
CMN_EVENT_DVM(CMN700, rxsnp_stall_starv, 0x13),
CMN_EVENT_DVM(CMN700, txsnp_sync_stall_op, 0x14),
CMN_EVENT_HNF(CMN_ANY, cache_miss, 0x01),
CMN_EVENT_HNF(CMN_ANY, slc_sf_cache_access, 0x02),
CMN_EVENT_HNF(CMN_ANY, cache_fill, 0x03),
CMN_EVENT_HNF(CMN_ANY, pocq_retry, 0x04),
CMN_EVENT_HNF(CMN_ANY, pocq_reqs_recvd, 0x05),
CMN_EVENT_HNF(CMN_ANY, sf_hit, 0x06),
CMN_EVENT_HNF(CMN_ANY, sf_evictions, 0x07),
CMN_EVENT_HNF(CMN_ANY, dir_snoops_sent, 0x08),
CMN_EVENT_HNF(CMN_ANY, brd_snoops_sent, 0x09),
CMN_EVENT_HNF(CMN_ANY, slc_eviction, 0x0a),
CMN_EVENT_HNF(CMN_ANY, slc_fill_invalid_way, 0x0b),
CMN_EVENT_HNF(CMN_ANY, mc_retries, 0x0c),
CMN_EVENT_HNF(CMN_ANY, mc_reqs, 0x0d),
CMN_EVENT_HNF(CMN_ANY, qos_hh_retry, 0x0e),
_CMN_EVENT_HNF(CMN_ANY, qos_pocq_occupancy_all, 0x0f, 0, SEL_OCCUP1ID),
_CMN_EVENT_HNF(CMN_ANY, qos_pocq_occupancy_read, 0x0f, 1, SEL_OCCUP1ID),
_CMN_EVENT_HNF(CMN_ANY, qos_pocq_occupancy_write, 0x0f, 2, SEL_OCCUP1ID),
_CMN_EVENT_HNF(CMN_ANY, qos_pocq_occupancy_atomic, 0x0f, 3, SEL_OCCUP1ID),
_CMN_EVENT_HNF(CMN_ANY, qos_pocq_occupancy_stash, 0x0f, 4, SEL_OCCUP1ID),
CMN_EVENT_HNF(CMN_ANY, pocq_addrhaz, 0x10),
CMN_EVENT_HNF(CMN_ANY, pocq_atomic_addrhaz, 0x11),
CMN_EVENT_HNF(CMN_ANY, ld_st_swp_adq_full, 0x12),
CMN_EVENT_HNF(CMN_ANY, cmp_adq_full, 0x13),
CMN_EVENT_HNF(CMN_ANY, txdat_stall, 0x14),
CMN_EVENT_HNF(CMN_ANY, txrsp_stall, 0x15),
CMN_EVENT_HNF(CMN_ANY, seq_full, 0x16),
CMN_EVENT_HNF(CMN_ANY, seq_hit, 0x17),
CMN_EVENT_HNF(CMN_ANY, snp_sent, 0x18),
CMN_EVENT_HNF(CMN_ANY, sfbi_dir_snp_sent, 0x19),
CMN_EVENT_HNF(CMN_ANY, sfbi_brd_snp_sent, 0x1a),
CMN_EVENT_HNF(CMN_ANY, snp_sent_untrk, 0x1b),
CMN_EVENT_HNF(CMN_ANY, intv_dirty, 0x1c),
CMN_EVENT_HNF(CMN_ANY, stash_snp_sent, 0x1d),
CMN_EVENT_HNF(CMN_ANY, stash_data_pull, 0x1e),
CMN_EVENT_HNF(CMN_ANY, snp_fwded, 0x1f),
CMN_EVENT_HNF(NOT_CMN600, atomic_fwd, 0x20),
CMN_EVENT_HNF(NOT_CMN600, mpam_hardlim, 0x21),
CMN_EVENT_HNF(NOT_CMN600, mpam_softlim, 0x22),
CMN_EVENT_HNF(CMN_650ON, snp_sent_cluster, 0x23),
CMN_EVENT_HNF(CMN_650ON, sf_imprecise_evict, 0x24),
CMN_EVENT_HNF(CMN_650ON, sf_evict_shared_line, 0x25),
CMN_EVENT_HNF_CLS(CMN700, pocq_class_occup, 0x26),
CMN_EVENT_HNF_CLS(CMN700, pocq_class_retry, 0x27),
CMN_EVENT_HNF_CLS(CMN700, class_mc_reqs, 0x28),
CMN_EVENT_HNF_CLS(CMN700, class_cgnt_cmin, 0x29),
CMN_EVENT_HNF_SNT(CMN700, sn_throttle, 0x2a),
CMN_EVENT_HNF_SNT(CMN700, sn_throttle_min, 0x2b),
CMN_EVENT_HNF(CMN700, sf_precise_to_imprecise, 0x2c),
CMN_EVENT_HNF(CMN700, snp_intv_cln, 0x2d),
CMN_EVENT_HNF(CMN700, nc_excl, 0x2e),
CMN_EVENT_HNF(CMN700, excl_mon_ovfl, 0x2f),
CMN_EVENT_HNI(rrt_rd_occ_cnt_ovfl, 0x20),
CMN_EVENT_HNI(rrt_wr_occ_cnt_ovfl, 0x21),
CMN_EVENT_HNI(rdt_rd_occ_cnt_ovfl, 0x22),
CMN_EVENT_HNI(rdt_wr_occ_cnt_ovfl, 0x23),
CMN_EVENT_HNI(wdb_occ_cnt_ovfl, 0x24),
CMN_EVENT_HNI(rrt_rd_alloc, 0x25),
CMN_EVENT_HNI(rrt_wr_alloc, 0x26),
CMN_EVENT_HNI(rdt_rd_alloc, 0x27),
CMN_EVENT_HNI(rdt_wr_alloc, 0x28),
CMN_EVENT_HNI(wdb_alloc, 0x29),
CMN_EVENT_HNI(txrsp_retryack, 0x2a),
CMN_EVENT_HNI(arvalid_no_arready, 0x2b),
CMN_EVENT_HNI(arready_no_arvalid, 0x2c),
CMN_EVENT_HNI(awvalid_no_awready, 0x2d),
CMN_EVENT_HNI(awready_no_awvalid, 0x2e),
CMN_EVENT_HNI(wvalid_no_wready, 0x2f),
CMN_EVENT_HNI(txdat_stall, 0x30),
CMN_EVENT_HNI(nonpcie_serialization, 0x31),
CMN_EVENT_HNI(pcie_serialization, 0x32),
/*
* HN-P events squat on top of the HN-I similarly to DVM events, except
* for being crammed into the same physical node as well. And of course
* where would the fun be if the same events were in the same order...
*/
CMN_EVENT_HNP(rrt_wr_occ_cnt_ovfl, 0x01),
CMN_EVENT_HNP(rdt_wr_occ_cnt_ovfl, 0x02),
CMN_EVENT_HNP(wdb_occ_cnt_ovfl, 0x03),
CMN_EVENT_HNP(rrt_wr_alloc, 0x04),
CMN_EVENT_HNP(rdt_wr_alloc, 0x05),
CMN_EVENT_HNP(wdb_alloc, 0x06),
CMN_EVENT_HNP(awvalid_no_awready, 0x07),
CMN_EVENT_HNP(awready_no_awvalid, 0x08),
CMN_EVENT_HNP(wvalid_no_wready, 0x09),
CMN_EVENT_HNP(rrt_rd_occ_cnt_ovfl, 0x11),
CMN_EVENT_HNP(rdt_rd_occ_cnt_ovfl, 0x12),
CMN_EVENT_HNP(rrt_rd_alloc, 0x13),
CMN_EVENT_HNP(rdt_rd_alloc, 0x14),
CMN_EVENT_HNP(arvalid_no_arready, 0x15),
CMN_EVENT_HNP(arready_no_arvalid, 0x16),
CMN_EVENT_XP(txflit_valid, 0x01),
CMN_EVENT_XP(txflit_stall, 0x02),
CMN_EVENT_XP(partial_dat_flit, 0x03),
/* We treat watchpoints as a special made-up class of XP events */
CMN_EVENT_ATTR(CMN_ANY, watchpoint_up, CMN_TYPE_WP, CMN_WP_UP),
CMN_EVENT_ATTR(CMN_ANY, watchpoint_down, CMN_TYPE_WP, CMN_WP_DOWN),
CMN_EVENT_SBSX(CMN_ANY, rd_req, 0x01),
CMN_EVENT_SBSX(CMN_ANY, wr_req, 0x02),
CMN_EVENT_SBSX(CMN_ANY, cmo_req, 0x03),
CMN_EVENT_SBSX(CMN_ANY, txrsp_retryack, 0x04),
CMN_EVENT_SBSX(CMN_ANY, txdat_flitv, 0x05),
CMN_EVENT_SBSX(CMN_ANY, txrsp_flitv, 0x06),
CMN_EVENT_SBSX(CMN_ANY, rd_req_trkr_occ_cnt_ovfl, 0x11),
CMN_EVENT_SBSX(CMN_ANY, wr_req_trkr_occ_cnt_ovfl, 0x12),
CMN_EVENT_SBSX(CMN_ANY, cmo_req_trkr_occ_cnt_ovfl, 0x13),
CMN_EVENT_SBSX(CMN_ANY, wdb_occ_cnt_ovfl, 0x14),
CMN_EVENT_SBSX(CMN_ANY, rd_axi_trkr_occ_cnt_ovfl, 0x15),
CMN_EVENT_SBSX(CMN_ANY, cmo_axi_trkr_occ_cnt_ovfl, 0x16),
CMN_EVENT_SBSX(NOT_CMN600, rdb_occ_cnt_ovfl, 0x17),
CMN_EVENT_SBSX(CMN_ANY, arvalid_no_arready, 0x21),
CMN_EVENT_SBSX(CMN_ANY, awvalid_no_awready, 0x22),
CMN_EVENT_SBSX(CMN_ANY, wvalid_no_wready, 0x23),
CMN_EVENT_SBSX(CMN_ANY, txdat_stall, 0x24),
CMN_EVENT_SBSX(CMN_ANY, txrsp_stall, 0x25),
CMN_EVENT_RNID(CMN_ANY, s0_rdata_beats, 0x01),
CMN_EVENT_RNID(CMN_ANY, s1_rdata_beats, 0x02),
CMN_EVENT_RNID(CMN_ANY, s2_rdata_beats, 0x03),
CMN_EVENT_RNID(CMN_ANY, rxdat_flits, 0x04),
CMN_EVENT_RNID(CMN_ANY, txdat_flits, 0x05),
CMN_EVENT_RNID(CMN_ANY, txreq_flits_total, 0x06),
CMN_EVENT_RNID(CMN_ANY, txreq_flits_retried, 0x07),
CMN_EVENT_RNID(CMN_ANY, rrt_occ_ovfl, 0x08),
CMN_EVENT_RNID(CMN_ANY, wrt_occ_ovfl, 0x09),
CMN_EVENT_RNID(CMN_ANY, txreq_flits_replayed, 0x0a),
CMN_EVENT_RNID(CMN_ANY, wrcancel_sent, 0x0b),
CMN_EVENT_RNID(CMN_ANY, s0_wdata_beats, 0x0c),
CMN_EVENT_RNID(CMN_ANY, s1_wdata_beats, 0x0d),
CMN_EVENT_RNID(CMN_ANY, s2_wdata_beats, 0x0e),
CMN_EVENT_RNID(CMN_ANY, rrt_alloc, 0x0f),
CMN_EVENT_RNID(CMN_ANY, wrt_alloc, 0x10),
CMN_EVENT_RNID(CMN600, rdb_unord, 0x11),
CMN_EVENT_RNID(CMN600, rdb_replay, 0x12),
CMN_EVENT_RNID(CMN600, rdb_hybrid, 0x13),
CMN_EVENT_RNID(CMN600, rdb_ord, 0x14),
CMN_EVENT_RNID(NOT_CMN600, padb_occ_ovfl, 0x11),
CMN_EVENT_RNID(NOT_CMN600, rpdb_occ_ovfl, 0x12),
CMN_EVENT_RNID(NOT_CMN600, rrt_occup_ovfl_slice1, 0x13),
CMN_EVENT_RNID(NOT_CMN600, rrt_occup_ovfl_slice2, 0x14),
CMN_EVENT_RNID(NOT_CMN600, rrt_occup_ovfl_slice3, 0x15),
CMN_EVENT_RNID(NOT_CMN600, wrt_throttled, 0x16),
CMN_EVENT_RNID(CMN700, ldb_full, 0x17),
CMN_EVENT_RNID(CMN700, rrt_rd_req_occup_ovfl_slice0, 0x18),
CMN_EVENT_RNID(CMN700, rrt_rd_req_occup_ovfl_slice1, 0x19),
CMN_EVENT_RNID(CMN700, rrt_rd_req_occup_ovfl_slice2, 0x1a),
CMN_EVENT_RNID(CMN700, rrt_rd_req_occup_ovfl_slice3, 0x1b),
CMN_EVENT_RNID(CMN700, rrt_burst_occup_ovfl_slice0, 0x1c),
CMN_EVENT_RNID(CMN700, rrt_burst_occup_ovfl_slice1, 0x1d),
CMN_EVENT_RNID(CMN700, rrt_burst_occup_ovfl_slice2, 0x1e),
CMN_EVENT_RNID(CMN700, rrt_burst_occup_ovfl_slice3, 0x1f),
CMN_EVENT_RNID(CMN700, rrt_burst_alloc, 0x20),
CMN_EVENT_RNID(CMN700, awid_hash, 0x21),
CMN_EVENT_RNID(CMN700, atomic_alloc, 0x22),
CMN_EVENT_RNID(CMN700, atomic_occ_ovfl, 0x23),
CMN_EVENT_MTSX(tc_lookup, 0x01),
CMN_EVENT_MTSX(tc_fill, 0x02),
CMN_EVENT_MTSX(tc_miss, 0x03),
CMN_EVENT_MTSX(tdb_forward, 0x04),
CMN_EVENT_MTSX(tcq_hazard, 0x05),
CMN_EVENT_MTSX(tcq_rd_alloc, 0x06),
CMN_EVENT_MTSX(tcq_wr_alloc, 0x07),
CMN_EVENT_MTSX(tcq_cmo_alloc, 0x08),
CMN_EVENT_MTSX(axi_rd_req, 0x09),
CMN_EVENT_MTSX(axi_wr_req, 0x0a),
CMN_EVENT_MTSX(tcq_occ_cnt_ovfl, 0x0b),
CMN_EVENT_MTSX(tdb_occ_cnt_ovfl, 0x0c),
CMN_EVENT_CXRA(CMN_ANY, rht_occ, 0x01),
CMN_EVENT_CXRA(CMN_ANY, sht_occ, 0x02),
CMN_EVENT_CXRA(CMN_ANY, rdb_occ, 0x03),
CMN_EVENT_CXRA(CMN_ANY, wdb_occ, 0x04),
CMN_EVENT_CXRA(CMN_ANY, ssb_occ, 0x05),
CMN_EVENT_CXRA(CMN_ANY, snp_bcasts, 0x06),
CMN_EVENT_CXRA(CMN_ANY, req_chains, 0x07),
CMN_EVENT_CXRA(CMN_ANY, req_chain_avglen, 0x08),
CMN_EVENT_CXRA(CMN_ANY, chirsp_stalls, 0x09),
CMN_EVENT_CXRA(CMN_ANY, chidat_stalls, 0x0a),
CMN_EVENT_CXRA(CMN_ANY, cxreq_pcrd_stalls_link0, 0x0b),
CMN_EVENT_CXRA(CMN_ANY, cxreq_pcrd_stalls_link1, 0x0c),
CMN_EVENT_CXRA(CMN_ANY, cxreq_pcrd_stalls_link2, 0x0d),
CMN_EVENT_CXRA(CMN_ANY, cxdat_pcrd_stalls_link0, 0x0e),
CMN_EVENT_CXRA(CMN_ANY, cxdat_pcrd_stalls_link1, 0x0f),
CMN_EVENT_CXRA(CMN_ANY, cxdat_pcrd_stalls_link2, 0x10),
CMN_EVENT_CXRA(CMN_ANY, external_chirsp_stalls, 0x11),
CMN_EVENT_CXRA(CMN_ANY, external_chidat_stalls, 0x12),
CMN_EVENT_CXRA(NOT_CMN600, cxmisc_pcrd_stalls_link0, 0x13),
CMN_EVENT_CXRA(NOT_CMN600, cxmisc_pcrd_stalls_link1, 0x14),
CMN_EVENT_CXRA(NOT_CMN600, cxmisc_pcrd_stalls_link2, 0x15),
CMN_EVENT_CXHA(rddatbyp, 0x21),
CMN_EVENT_CXHA(chirsp_up_stall, 0x22),
CMN_EVENT_CXHA(chidat_up_stall, 0x23),
CMN_EVENT_CXHA(snppcrd_link0_stall, 0x24),
CMN_EVENT_CXHA(snppcrd_link1_stall, 0x25),
CMN_EVENT_CXHA(snppcrd_link2_stall, 0x26),
CMN_EVENT_CXHA(reqtrk_occ, 0x27),
CMN_EVENT_CXHA(rdb_occ, 0x28),
CMN_EVENT_CXHA(rdbyp_occ, 0x29),
CMN_EVENT_CXHA(wdb_occ, 0x2a),
CMN_EVENT_CXHA(snptrk_occ, 0x2b),
CMN_EVENT_CXHA(sdb_occ, 0x2c),
CMN_EVENT_CXHA(snphaz_occ, 0x2d),
CMN_EVENT_CCRA(rht_occ, 0x41),
CMN_EVENT_CCRA(sht_occ, 0x42),
CMN_EVENT_CCRA(rdb_occ, 0x43),
CMN_EVENT_CCRA(wdb_occ, 0x44),
CMN_EVENT_CCRA(ssb_occ, 0x45),
CMN_EVENT_CCRA(snp_bcasts, 0x46),
CMN_EVENT_CCRA(req_chains, 0x47),
CMN_EVENT_CCRA(req_chain_avglen, 0x48),
CMN_EVENT_CCRA(chirsp_stalls, 0x49),
CMN_EVENT_CCRA(chidat_stalls, 0x4a),
CMN_EVENT_CCRA(cxreq_pcrd_stalls_link0, 0x4b),
CMN_EVENT_CCRA(cxreq_pcrd_stalls_link1, 0x4c),
CMN_EVENT_CCRA(cxreq_pcrd_stalls_link2, 0x4d),
CMN_EVENT_CCRA(cxdat_pcrd_stalls_link0, 0x4e),
CMN_EVENT_CCRA(cxdat_pcrd_stalls_link1, 0x4f),
CMN_EVENT_CCRA(cxdat_pcrd_stalls_link2, 0x50),
CMN_EVENT_CCRA(external_chirsp_stalls, 0x51),
CMN_EVENT_CCRA(external_chidat_stalls, 0x52),
CMN_EVENT_CCRA(cxmisc_pcrd_stalls_link0, 0x53),
CMN_EVENT_CCRA(cxmisc_pcrd_stalls_link1, 0x54),
CMN_EVENT_CCRA(cxmisc_pcrd_stalls_link2, 0x55),
CMN_EVENT_CCRA(rht_alloc, 0x56),
CMN_EVENT_CCRA(sht_alloc, 0x57),
CMN_EVENT_CCRA(rdb_alloc, 0x58),
CMN_EVENT_CCRA(wdb_alloc, 0x59),
CMN_EVENT_CCRA(ssb_alloc, 0x5a),
CMN_EVENT_CCHA(rddatbyp, 0x61),
CMN_EVENT_CCHA(chirsp_up_stall, 0x62),
CMN_EVENT_CCHA(chidat_up_stall, 0x63),
CMN_EVENT_CCHA(snppcrd_link0_stall, 0x64),
CMN_EVENT_CCHA(snppcrd_link1_stall, 0x65),
CMN_EVENT_CCHA(snppcrd_link2_stall, 0x66),
CMN_EVENT_CCHA(reqtrk_occ, 0x67),
CMN_EVENT_CCHA(rdb_occ, 0x68),
CMN_EVENT_CCHA(rdbyp_occ, 0x69),
CMN_EVENT_CCHA(wdb_occ, 0x6a),
CMN_EVENT_CCHA(snptrk_occ, 0x6b),
CMN_EVENT_CCHA(sdb_occ, 0x6c),
CMN_EVENT_CCHA(snphaz_occ, 0x6d),
CMN_EVENT_CCHA(reqtrk_alloc, 0x6e),
CMN_EVENT_CCHA(rdb_alloc, 0x6f),
CMN_EVENT_CCHA(rdbyp_alloc, 0x70),
CMN_EVENT_CCHA(wdb_alloc, 0x71),
CMN_EVENT_CCHA(snptrk_alloc, 0x72),
CMN_EVENT_CCHA(sdb_alloc, 0x73),
CMN_EVENT_CCHA(snphaz_alloc, 0x74),
CMN_EVENT_CCHA(pb_rhu_req_occ, 0x75),
CMN_EVENT_CCHA(pb_rhu_req_alloc, 0x76),
CMN_EVENT_CCHA(pb_rhu_pcie_req_occ, 0x77),
CMN_EVENT_CCHA(pb_rhu_pcie_req_alloc, 0x78),
CMN_EVENT_CCHA(pb_pcie_wr_req_occ, 0x79),
CMN_EVENT_CCHA(pb_pcie_wr_req_alloc, 0x7a),
CMN_EVENT_CCHA(pb_pcie_reg_req_occ, 0x7b),
CMN_EVENT_CCHA(pb_pcie_reg_req_alloc, 0x7c),
CMN_EVENT_CCHA(pb_pcie_rsvd_req_occ, 0x7d),
CMN_EVENT_CCHA(pb_pcie_rsvd_req_alloc, 0x7e),
CMN_EVENT_CCHA(pb_rhu_dat_occ, 0x7f),
CMN_EVENT_CCHA(pb_rhu_dat_alloc, 0x80),
CMN_EVENT_CCHA(pb_rhu_pcie_dat_occ, 0x81),
CMN_EVENT_CCHA(pb_rhu_pcie_dat_alloc, 0x82),
CMN_EVENT_CCHA(pb_pcie_wr_dat_occ, 0x83),
CMN_EVENT_CCHA(pb_pcie_wr_dat_alloc, 0x84),
CMN_EVENT_CCLA(rx_cxs, 0x21),
CMN_EVENT_CCLA(tx_cxs, 0x22),
CMN_EVENT_CCLA(rx_cxs_avg_size, 0x23),
CMN_EVENT_CCLA(tx_cxs_avg_size, 0x24),
CMN_EVENT_CCLA(tx_cxs_lcrd_backpressure, 0x25),
CMN_EVENT_CCLA(link_crdbuf_occ, 0x26),
CMN_EVENT_CCLA(link_crdbuf_alloc, 0x27),
CMN_EVENT_CCLA(pfwd_rcvr_cxs, 0x28),
CMN_EVENT_CCLA(pfwd_sndr_num_flits, 0x29),
CMN_EVENT_CCLA(pfwd_sndr_stalls_static_crd, 0x2a),
CMN_EVENT_CCLA(pfwd_sndr_stalls_dynmaic_crd, 0x2b),
NULL
};
static const struct attribute_group arm_cmn_event_attrs_group = {
.name = "events",
.attrs = arm_cmn_event_attrs,
.is_visible = arm_cmn_event_attr_is_visible,
};
static ssize_t arm_cmn_format_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct arm_cmn_format_attr *fmt = container_of(attr, typeof(*fmt), attr);
int lo = __ffs(fmt->field), hi = __fls(fmt->field);
if (lo == hi)
return sysfs_emit(buf, "config:%d\n", lo);
if (!fmt->config)
return sysfs_emit(buf, "config:%d-%d\n", lo, hi);
return sysfs_emit(buf, "config%d:%d-%d\n", fmt->config, lo, hi);
}
#define _CMN_FORMAT_ATTR(_name, _cfg, _fld) \
(&((struct arm_cmn_format_attr[]) {{ \
.attr = __ATTR(_name, 0444, arm_cmn_format_show, NULL), \
.config = _cfg, \
.field = _fld, \
}})[0].attr.attr)
#define CMN_FORMAT_ATTR(_name, _fld) _CMN_FORMAT_ATTR(_name, 0, _fld)
static struct attribute *arm_cmn_format_attrs[] = {
CMN_FORMAT_ATTR(type, CMN_CONFIG_TYPE),
CMN_FORMAT_ATTR(eventid, CMN_CONFIG_EVENTID),
CMN_FORMAT_ATTR(occupid, CMN_CONFIG_OCCUPID),
CMN_FORMAT_ATTR(bynodeid, CMN_CONFIG_BYNODEID),
CMN_FORMAT_ATTR(nodeid, CMN_CONFIG_NODEID),
CMN_FORMAT_ATTR(wp_dev_sel, CMN_CONFIG_WP_DEV_SEL),
CMN_FORMAT_ATTR(wp_chn_sel, CMN_CONFIG_WP_CHN_SEL),
CMN_FORMAT_ATTR(wp_grp, CMN_CONFIG_WP_GRP),
CMN_FORMAT_ATTR(wp_exclusive, CMN_CONFIG_WP_EXCLUSIVE),
CMN_FORMAT_ATTR(wp_combine, CMN_CONFIG_WP_COMBINE),
_CMN_FORMAT_ATTR(wp_val, 1, CMN_CONFIG1_WP_VAL),
_CMN_FORMAT_ATTR(wp_mask, 2, CMN_CONFIG2_WP_MASK),
NULL
};
static const struct attribute_group arm_cmn_format_attrs_group = {
.name = "format",
.attrs = arm_cmn_format_attrs,
};
static ssize_t arm_cmn_cpumask_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct arm_cmn *cmn = to_cmn(dev_get_drvdata(dev));
return cpumap_print_to_pagebuf(true, buf, cpumask_of(cmn->cpu));
}
static struct device_attribute arm_cmn_cpumask_attr =
__ATTR(cpumask, 0444, arm_cmn_cpumask_show, NULL);
static struct attribute *arm_cmn_cpumask_attrs[] = {
&arm_cmn_cpumask_attr.attr,
NULL,
};
static const struct attribute_group arm_cmn_cpumask_attr_group = {
.attrs = arm_cmn_cpumask_attrs,
};
static const struct attribute_group *arm_cmn_attr_groups[] = {
&arm_cmn_event_attrs_group,
&arm_cmn_format_attrs_group,
&arm_cmn_cpumask_attr_group,
NULL
};
static int arm_cmn_wp_idx(struct perf_event *event)
{
return CMN_EVENT_EVENTID(event) + CMN_EVENT_WP_GRP(event);
}
static u32 arm_cmn_wp_config(struct perf_event *event)
{
u32 config;
u32 dev = CMN_EVENT_WP_DEV_SEL(event);
u32 chn = CMN_EVENT_WP_CHN_SEL(event);
u32 grp = CMN_EVENT_WP_GRP(event);
u32 exc = CMN_EVENT_WP_EXCLUSIVE(event);
u32 combine = CMN_EVENT_WP_COMBINE(event);
bool is_cmn600 = to_cmn(event->pmu)->model == CMN600;
config = FIELD_PREP(CMN_DTM_WPn_CONFIG_WP_DEV_SEL, dev) |
FIELD_PREP(CMN_DTM_WPn_CONFIG_WP_CHN_SEL, chn) |
FIELD_PREP(CMN_DTM_WPn_CONFIG_WP_GRP, grp) |
FIELD_PREP(CMN_DTM_WPn_CONFIG_WP_DEV_SEL2, dev >> 1);
if (exc)
config |= is_cmn600 ? CMN600_WPn_CONFIG_WP_EXCLUSIVE :
CMN_DTM_WPn_CONFIG_WP_EXCLUSIVE;
if (combine && !grp)
config |= is_cmn600 ? CMN600_WPn_CONFIG_WP_COMBINE :
CMN_DTM_WPn_CONFIG_WP_COMBINE;
return config;
}
static void arm_cmn_set_state(struct arm_cmn *cmn, u32 state)
{
if (!cmn->state)
writel_relaxed(0, cmn->dtc[0].base + CMN_DT_PMCR);
cmn->state |= state;
}
static void arm_cmn_clear_state(struct arm_cmn *cmn, u32 state)
{
cmn->state &= ~state;
if (!cmn->state)
writel_relaxed(CMN_DT_PMCR_PMU_EN | CMN_DT_PMCR_OVFL_INTR_EN,
cmn->dtc[0].base + CMN_DT_PMCR);
}
static void arm_cmn_pmu_enable(struct pmu *pmu)
{
arm_cmn_clear_state(to_cmn(pmu), CMN_STATE_DISABLED);
}
static void arm_cmn_pmu_disable(struct pmu *pmu)
{
arm_cmn_set_state(to_cmn(pmu), CMN_STATE_DISABLED);
}
static u64 arm_cmn_read_dtm(struct arm_cmn *cmn, struct arm_cmn_hw_event *hw,
bool snapshot)
{
struct arm_cmn_dtm *dtm = NULL;
struct arm_cmn_node *dn;
unsigned int i, offset, dtm_idx;
u64 reg, count = 0;
offset = snapshot ? CMN_DTM_PMEVCNTSR : CMN_DTM_PMEVCNT;
for_each_hw_dn(hw, dn, i) {
if (dtm != &cmn->dtms[dn->dtm]) {
dtm = &cmn->dtms[dn->dtm] + hw->dtm_offset;
reg = readq_relaxed(dtm->base + offset);
}
dtm_idx = arm_cmn_get_index(hw->dtm_idx, i);
count += (u16)(reg >> (dtm_idx * 16));
}
return count;
}
static u64 arm_cmn_read_cc(struct arm_cmn_dtc *dtc)
{
u64 val = readq_relaxed(dtc->base + CMN_DT_PMCCNTR);
writeq_relaxed(CMN_CC_INIT, dtc->base + CMN_DT_PMCCNTR);
return (val - CMN_CC_INIT) & ((CMN_CC_INIT << 1) - 1);
}
static u32 arm_cmn_read_counter(struct arm_cmn_dtc *dtc, int idx)
{
u32 val, pmevcnt = CMN_DT_PMEVCNT(idx);
val = readl_relaxed(dtc->base + pmevcnt);
writel_relaxed(CMN_COUNTER_INIT, dtc->base + pmevcnt);
return val - CMN_COUNTER_INIT;
}
static void arm_cmn_init_counter(struct perf_event *event)
{
struct arm_cmn *cmn = to_cmn(event->pmu);
struct arm_cmn_hw_event *hw = to_cmn_hw(event);
unsigned int i, pmevcnt = CMN_DT_PMEVCNT(hw->dtc_idx);
u64 count;
for (i = 0; hw->dtcs_used & (1U << i); i++) {
writel_relaxed(CMN_COUNTER_INIT, cmn->dtc[i].base + pmevcnt);
cmn->dtc[i].counters[hw->dtc_idx] = event;
}
count = arm_cmn_read_dtm(cmn, hw, false);
local64_set(&event->hw.prev_count, count);
}
static void arm_cmn_event_read(struct perf_event *event)
{
struct arm_cmn *cmn = to_cmn(event->pmu);
struct arm_cmn_hw_event *hw = to_cmn_hw(event);
u64 delta, new, prev;
unsigned long flags;
unsigned int i;
if (hw->dtc_idx == CMN_DT_NUM_COUNTERS) {
i = __ffs(hw->dtcs_used);
delta = arm_cmn_read_cc(cmn->dtc + i);
local64_add(delta, &event->count);
return;
}
new = arm_cmn_read_dtm(cmn, hw, false);
prev = local64_xchg(&event->hw.prev_count, new);
delta = new - prev;
local_irq_save(flags);
for (i = 0; hw->dtcs_used & (1U << i); i++) {
new = arm_cmn_read_counter(cmn->dtc + i, hw->dtc_idx);
delta += new << 16;
}
local_irq_restore(flags);
local64_add(delta, &event->count);
}
static int arm_cmn_set_event_sel_hi(struct arm_cmn_node *dn,
enum cmn_filter_select fsel, u8 occupid)
{
u64 reg;
if (fsel == SEL_NONE)
return 0;
if (!dn->occupid[fsel].count) {
dn->occupid[fsel].val = occupid;
reg = FIELD_PREP(CMN__PMU_CBUSY_SNTHROTTLE_SEL,
dn->occupid[SEL_CBUSY_SNTHROTTLE_SEL].val) |
FIELD_PREP(CMN__PMU_CLASS_OCCUP_ID,
dn->occupid[SEL_CLASS_OCCUP_ID].val) |
FIELD_PREP(CMN__PMU_OCCUP1_ID,
dn->occupid[SEL_OCCUP1ID].val);
writel_relaxed(reg >> 32, dn->pmu_base + CMN_PMU_EVENT_SEL + 4);
} else if (dn->occupid[fsel].val != occupid) {
return -EBUSY;
}
dn->occupid[fsel].count++;
return 0;
}
static void arm_cmn_set_event_sel_lo(struct arm_cmn_node *dn, int dtm_idx,
int eventid, bool wide_sel)
{
if (wide_sel) {
dn->event_w[dtm_idx] = eventid;
writeq_relaxed(le64_to_cpu(dn->event_sel_w), dn->pmu_base + CMN_PMU_EVENT_SEL);
} else {
dn->event[dtm_idx] = eventid;
writel_relaxed(le32_to_cpu(dn->event_sel), dn->pmu_base + CMN_PMU_EVENT_SEL);
}
}
static void arm_cmn_event_start(struct perf_event *event, int flags)
{
struct arm_cmn *cmn = to_cmn(event->pmu);
struct arm_cmn_hw_event *hw = to_cmn_hw(event);
struct arm_cmn_node *dn;
enum cmn_node_type type = CMN_EVENT_TYPE(event);
int i;
if (type == CMN_TYPE_DTC) {
i = __ffs(hw->dtcs_used);
writeq_relaxed(CMN_CC_INIT, cmn->dtc[i].base + CMN_DT_PMCCNTR);
cmn->dtc[i].cc_active = true;
} else if (type == CMN_TYPE_WP) {
int wp_idx = arm_cmn_wp_idx(event);
u64 val = CMN_EVENT_WP_VAL(event);
u64 mask = CMN_EVENT_WP_MASK(event);
for_each_hw_dn(hw, dn, i) {
void __iomem *base = dn->pmu_base + CMN_DTM_OFFSET(hw->dtm_offset);
writeq_relaxed(val, base + CMN_DTM_WPn_VAL(wp_idx));
writeq_relaxed(mask, base + CMN_DTM_WPn_MASK(wp_idx));
}
} else for_each_hw_dn(hw, dn, i) {
int dtm_idx = arm_cmn_get_index(hw->dtm_idx, i);
arm_cmn_set_event_sel_lo(dn, dtm_idx, CMN_EVENT_EVENTID(event),
hw->wide_sel);
}
}
static void arm_cmn_event_stop(struct perf_event *event, int flags)
{
struct arm_cmn *cmn = to_cmn(event->pmu);
struct arm_cmn_hw_event *hw = to_cmn_hw(event);
struct arm_cmn_node *dn;
enum cmn_node_type type = CMN_EVENT_TYPE(event);
int i;
if (type == CMN_TYPE_DTC) {
i = __ffs(hw->dtcs_used);
cmn->dtc[i].cc_active = false;
} else if (type == CMN_TYPE_WP) {
int wp_idx = arm_cmn_wp_idx(event);
for_each_hw_dn(hw, dn, i) {
void __iomem *base = dn->pmu_base + CMN_DTM_OFFSET(hw->dtm_offset);
writeq_relaxed(0, base + CMN_DTM_WPn_MASK(wp_idx));
writeq_relaxed(~0ULL, base + CMN_DTM_WPn_VAL(wp_idx));
}
} else for_each_hw_dn(hw, dn, i) {
int dtm_idx = arm_cmn_get_index(hw->dtm_idx, i);
arm_cmn_set_event_sel_lo(dn, dtm_idx, 0, hw->wide_sel);
}
arm_cmn_event_read(event);
}
struct arm_cmn_val {
u8 dtm_count[CMN_MAX_DTMS];
u8 occupid[CMN_MAX_DTMS][SEL_MAX];
u8 wp[CMN_MAX_DTMS][4];
int dtc_count;
bool cycles;
};
static void arm_cmn_val_add_event(struct arm_cmn *cmn, struct arm_cmn_val *val,
struct perf_event *event)
{
struct arm_cmn_hw_event *hw = to_cmn_hw(event);
struct arm_cmn_node *dn;
enum cmn_node_type type;
int i;
if (is_software_event(event))
return;
type = CMN_EVENT_TYPE(event);
if (type == CMN_TYPE_DTC) {
val->cycles = true;
return;
}
val->dtc_count++;
for_each_hw_dn(hw, dn, i) {
int wp_idx, dtm = dn->dtm, sel = hw->filter_sel;
val->dtm_count[dtm]++;
if (sel > SEL_NONE)
val->occupid[dtm][sel] = CMN_EVENT_OCCUPID(event) + 1;
if (type != CMN_TYPE_WP)
continue;
wp_idx = arm_cmn_wp_idx(event);
val->wp[dtm][wp_idx] = CMN_EVENT_WP_COMBINE(event) + 1;
}
}
static int arm_cmn_validate_group(struct arm_cmn *cmn, struct perf_event *event)
{
struct arm_cmn_hw_event *hw = to_cmn_hw(event);
struct arm_cmn_node *dn;
struct perf_event *sibling, *leader = event->group_leader;
enum cmn_node_type type;
struct arm_cmn_val *val;
int i, ret = -EINVAL;
if (leader == event)
return 0;
if (event->pmu != leader->pmu && !is_software_event(leader))
return -EINVAL;
val = kzalloc(sizeof(*val), GFP_KERNEL);
if (!val)
return -ENOMEM;
arm_cmn_val_add_event(cmn, val, leader);
for_each_sibling_event(sibling, leader)
arm_cmn_val_add_event(cmn, val, sibling);
type = CMN_EVENT_TYPE(event);
if (type == CMN_TYPE_DTC) {
ret = val->cycles ? -EINVAL : 0;
goto done;
}
if (val->dtc_count == CMN_DT_NUM_COUNTERS)
goto done;
for_each_hw_dn(hw, dn, i) {
int wp_idx, wp_cmb, dtm = dn->dtm, sel = hw->filter_sel;
if (val->dtm_count[dtm] == CMN_DTM_NUM_COUNTERS)
goto done;
if (sel > SEL_NONE && val->occupid[dtm][sel] &&
val->occupid[dtm][sel] != CMN_EVENT_OCCUPID(event) + 1)
goto done;
if (type != CMN_TYPE_WP)
continue;
wp_idx = arm_cmn_wp_idx(event);
if (val->wp[dtm][wp_idx])
goto done;
wp_cmb = val->wp[dtm][wp_idx ^ 1];
if (wp_cmb && wp_cmb != CMN_EVENT_WP_COMBINE(event) + 1)
goto done;
}
ret = 0;
done:
kfree(val);
return ret;
}
static enum cmn_filter_select arm_cmn_filter_sel(enum cmn_model model,
enum cmn_node_type type,
unsigned int eventid)
{
struct arm_cmn_event_attr *e;
int i;
for (i = 0; i < ARRAY_SIZE(arm_cmn_event_attrs) - 1; i++) {
e = container_of(arm_cmn_event_attrs[i], typeof(*e), attr.attr);
if (e->model & model && e->type == type && e->eventid == eventid)
return e->fsel;
}
return SEL_NONE;
}
static int arm_cmn_event_init(struct perf_event *event)
{
struct arm_cmn *cmn = to_cmn(event->pmu);
struct arm_cmn_hw_event *hw = to_cmn_hw(event);
struct arm_cmn_node *dn;
enum cmn_node_type type;
bool bynodeid;
u16 nodeid, eventid;
if (event->attr.type != event->pmu->type)
return -ENOENT;
if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK)
return -EINVAL;
event->cpu = cmn->cpu;
if (event->cpu < 0)
return -EINVAL;
type = CMN_EVENT_TYPE(event);
/* DTC events (i.e. cycles) already have everything they need */
if (type == CMN_TYPE_DTC)
return 0;
eventid = CMN_EVENT_EVENTID(event);
/* For watchpoints we need the actual XP node here */
if (type == CMN_TYPE_WP) {
type = CMN_TYPE_XP;
/* ...and we need a "real" direction */
if (eventid != CMN_WP_UP && eventid != CMN_WP_DOWN)
return -EINVAL;
/* ...but the DTM may depend on which port we're watching */
if (cmn->multi_dtm)
hw->dtm_offset = CMN_EVENT_WP_DEV_SEL(event) / 2;
} else if (type == CMN_TYPE_XP && cmn->model == CMN700) {
hw->wide_sel = true;
}
/* This is sufficiently annoying to recalculate, so cache it */
hw->filter_sel = arm_cmn_filter_sel(cmn->model, type, eventid);
bynodeid = CMN_EVENT_BYNODEID(event);
nodeid = CMN_EVENT_NODEID(event);
hw->dn = arm_cmn_node(cmn, type);
if (!hw->dn)
return -EINVAL;
for (dn = hw->dn; dn->type == type; dn++) {
if (bynodeid && dn->id != nodeid) {
hw->dn++;
continue;
}
hw->num_dns++;
if (bynodeid)
break;
}
if (!hw->num_dns) {
struct arm_cmn_nodeid nid = arm_cmn_nid(cmn, nodeid);
dev_dbg(cmn->dev, "invalid node 0x%x (%d,%d,%d,%d) type 0x%x\n",
nodeid, nid.x, nid.y, nid.port, nid.dev, type);
return -EINVAL;
}
/*
* Keep assuming non-cycles events count in all DTC domains; turns out
* it's hard to make a worthwhile optimisation around this, short of
* going all-in with domain-local counter allocation as well.
*/
hw->dtcs_used = (1U << cmn->num_dtcs) - 1;
return arm_cmn_validate_group(cmn, event);
}
static void arm_cmn_event_clear(struct arm_cmn *cmn, struct perf_event *event,
int i)
{
struct arm_cmn_hw_event *hw = to_cmn_hw(event);
enum cmn_node_type type = CMN_EVENT_TYPE(event);
while (i--) {
struct arm_cmn_dtm *dtm = &cmn->dtms[hw->dn[i].dtm] + hw->dtm_offset;
unsigned int dtm_idx = arm_cmn_get_index(hw->dtm_idx, i);
if (type == CMN_TYPE_WP)
dtm->wp_event[arm_cmn_wp_idx(event)] = -1;
if (hw->filter_sel > SEL_NONE)
hw->dn[i].occupid[hw->filter_sel].count--;
dtm->pmu_config_low &= ~CMN__PMEVCNT_PAIRED(dtm_idx);
writel_relaxed(dtm->pmu_config_low, dtm->base + CMN_DTM_PMU_CONFIG);
}
memset(hw->dtm_idx, 0, sizeof(hw->dtm_idx));
for (i = 0; hw->dtcs_used & (1U << i); i++)
cmn->dtc[i].counters[hw->dtc_idx] = NULL;
}
static int arm_cmn_event_add(struct perf_event *event, int flags)
{
struct arm_cmn *cmn = to_cmn(event->pmu);
struct arm_cmn_hw_event *hw = to_cmn_hw(event);
struct arm_cmn_dtc *dtc = &cmn->dtc[0];
struct arm_cmn_node *dn;
enum cmn_node_type type = CMN_EVENT_TYPE(event);
unsigned int i, dtc_idx, input_sel;
if (type == CMN_TYPE_DTC) {
i = 0;
while (cmn->dtc[i].cycles)
if (++i == cmn->num_dtcs)
return -ENOSPC;
cmn->dtc[i].cycles = event;
hw->dtc_idx = CMN_DT_NUM_COUNTERS;
hw->dtcs_used = 1U << i;
if (flags & PERF_EF_START)
arm_cmn_event_start(event, 0);
return 0;
}
/* Grab a free global counter first... */
dtc_idx = 0;
while (dtc->counters[dtc_idx])
if (++dtc_idx == CMN_DT_NUM_COUNTERS)
return -ENOSPC;
hw->dtc_idx = dtc_idx;
/* ...then the local counters to feed it. */
for_each_hw_dn(hw, dn, i) {
struct arm_cmn_dtm *dtm = &cmn->dtms[dn->dtm] + hw->dtm_offset;
unsigned int dtm_idx, shift;
u64 reg;
dtm_idx = 0;
while (dtm->pmu_config_low & CMN__PMEVCNT_PAIRED(dtm_idx))
if (++dtm_idx == CMN_DTM_NUM_COUNTERS)
goto free_dtms;
if (type == CMN_TYPE_XP) {
input_sel = CMN__PMEVCNT0_INPUT_SEL_XP + dtm_idx;
} else if (type == CMN_TYPE_WP) {
int tmp, wp_idx = arm_cmn_wp_idx(event);
u32 cfg = arm_cmn_wp_config(event);
if (dtm->wp_event[wp_idx] >= 0)
goto free_dtms;
tmp = dtm->wp_event[wp_idx ^ 1];
if (tmp >= 0 && CMN_EVENT_WP_COMBINE(event) !=
CMN_EVENT_WP_COMBINE(dtc->counters[tmp]))
goto free_dtms;
input_sel = CMN__PMEVCNT0_INPUT_SEL_WP + wp_idx;
dtm->wp_event[wp_idx] = dtc_idx;
writel_relaxed(cfg, dtm->base + CMN_DTM_WPn_CONFIG(wp_idx));
} else {
struct arm_cmn_nodeid nid = arm_cmn_nid(cmn, dn->id);
if (cmn->multi_dtm)
nid.port %= 2;
input_sel = CMN__PMEVCNT0_INPUT_SEL_DEV + dtm_idx +
(nid.port << 4) + (nid.dev << 2);
if (arm_cmn_set_event_sel_hi(dn, hw->filter_sel, CMN_EVENT_OCCUPID(event)))
goto free_dtms;
}
arm_cmn_set_index(hw->dtm_idx, i, dtm_idx);
dtm->input_sel[dtm_idx] = input_sel;
shift = CMN__PMEVCNTn_GLOBAL_NUM_SHIFT(dtm_idx);
dtm->pmu_config_low &= ~(CMN__PMEVCNT0_GLOBAL_NUM << shift);
dtm->pmu_config_low |= FIELD_PREP(CMN__PMEVCNT0_GLOBAL_NUM, dtc_idx) << shift;
dtm->pmu_config_low |= CMN__PMEVCNT_PAIRED(dtm_idx);
reg = (u64)le32_to_cpu(dtm->pmu_config_high) << 32 | dtm->pmu_config_low;
writeq_relaxed(reg, dtm->base + CMN_DTM_PMU_CONFIG);
}
/* Go go go! */
arm_cmn_init_counter(event);
if (flags & PERF_EF_START)
arm_cmn_event_start(event, 0);
return 0;
free_dtms:
arm_cmn_event_clear(cmn, event, i);
return -ENOSPC;
}
static void arm_cmn_event_del(struct perf_event *event, int flags)
{
struct arm_cmn *cmn = to_cmn(event->pmu);
struct arm_cmn_hw_event *hw = to_cmn_hw(event);
enum cmn_node_type type = CMN_EVENT_TYPE(event);
arm_cmn_event_stop(event, PERF_EF_UPDATE);
if (type == CMN_TYPE_DTC)
cmn->dtc[__ffs(hw->dtcs_used)].cycles = NULL;
else
arm_cmn_event_clear(cmn, event, hw->num_dns);
}
/*
* We stop the PMU for both add and read, to avoid skew across DTM counters.
* In theory we could use snapshots to read without stopping, but then it
* becomes a lot trickier to deal with overlow and racing against interrupts,
* plus it seems they don't work properly on some hardware anyway :(
*/
static void arm_cmn_start_txn(struct pmu *pmu, unsigned int flags)
{
arm_cmn_set_state(to_cmn(pmu), CMN_STATE_TXN);
}
static void arm_cmn_end_txn(struct pmu *pmu)
{
arm_cmn_clear_state(to_cmn(pmu), CMN_STATE_TXN);
}
static int arm_cmn_commit_txn(struct pmu *pmu)
{
arm_cmn_end_txn(pmu);
return 0;
}
static void arm_cmn_migrate(struct arm_cmn *cmn, unsigned int cpu)
{
unsigned int i;
perf_pmu_migrate_context(&cmn->pmu, cmn->cpu, cpu);
for (i = 0; i < cmn->num_dtcs; i++)
irq_set_affinity(cmn->dtc[i].irq, cpumask_of(cpu));
cmn->cpu = cpu;
}
static int arm_cmn_pmu_online_cpu(unsigned int cpu, struct hlist_node *cpuhp_node)
{
struct arm_cmn *cmn;
int node;
cmn = hlist_entry_safe(cpuhp_node, struct arm_cmn, cpuhp_node);
node = dev_to_node(cmn->dev);
if (node != NUMA_NO_NODE && cpu_to_node(cmn->cpu) != node && cpu_to_node(cpu) == node)
arm_cmn_migrate(cmn, cpu);
return 0;
}
static int arm_cmn_pmu_offline_cpu(unsigned int cpu, struct hlist_node *cpuhp_node)
{
struct arm_cmn *cmn;
unsigned int target;
int node;
cpumask_t mask;
cmn = hlist_entry_safe(cpuhp_node, struct arm_cmn, cpuhp_node);
if (cpu != cmn->cpu)
return 0;
node = dev_to_node(cmn->dev);
if (cpumask_and(&mask, cpumask_of_node(node), cpu_online_mask) &&
cpumask_andnot(&mask, &mask, cpumask_of(cpu)))
target = cpumask_any(&mask);
else
target = cpumask_any_but(cpu_online_mask, cpu);
if (target < nr_cpu_ids)
arm_cmn_migrate(cmn, target);
return 0;
}
static irqreturn_t arm_cmn_handle_irq(int irq, void *dev_id)
{
struct arm_cmn_dtc *dtc = dev_id;
irqreturn_t ret = IRQ_NONE;
for (;;) {
u32 status = readl_relaxed(dtc->base + CMN_DT_PMOVSR);
u64 delta;
int i;
for (i = 0; i < CMN_DTM_NUM_COUNTERS; i++) {
if (status & (1U << i)) {
ret = IRQ_HANDLED;
if (WARN_ON(!dtc->counters[i]))
continue;
delta = (u64)arm_cmn_read_counter(dtc, i) << 16;
local64_add(delta, &dtc->counters[i]->count);
}
}
if (status & (1U << CMN_DT_NUM_COUNTERS)) {
ret = IRQ_HANDLED;
if (dtc->cc_active && !WARN_ON(!dtc->cycles)) {
delta = arm_cmn_read_cc(dtc);
local64_add(delta, &dtc->cycles->count);
}
}
writel_relaxed(status, dtc->base + CMN_DT_PMOVSR_CLR);
if (!dtc->irq_friend)
return ret;
dtc += dtc->irq_friend;
}
}
/* We can reasonably accommodate DTCs of the same CMN sharing IRQs */
static int arm_cmn_init_irqs(struct arm_cmn *cmn)
{
int i, j, irq, err;
for (i = 0; i < cmn->num_dtcs; i++) {
irq = cmn->dtc[i].irq;
for (j = i; j--; ) {
if (cmn->dtc[j].irq == irq) {
cmn->dtc[j].irq_friend = i - j;
goto next;
}
}
err = devm_request_irq(cmn->dev, irq, arm_cmn_handle_irq,
IRQF_NOBALANCING | IRQF_NO_THREAD,
dev_name(cmn->dev), &cmn->dtc[i]);
if (err)
return err;
err = irq_set_affinity(irq, cpumask_of(cmn->cpu));
if (err)
return err;
next:
; /* isn't C great? */
}
return 0;
}
static void arm_cmn_init_dtm(struct arm_cmn_dtm *dtm, struct arm_cmn_node *xp, int idx)
{
int i;
dtm->base = xp->pmu_base + CMN_DTM_OFFSET(idx);
dtm->pmu_config_low = CMN_DTM_PMU_CONFIG_PMU_EN;
for (i = 0; i < 4; i++) {
dtm->wp_event[i] = -1;
writeq_relaxed(0, dtm->base + CMN_DTM_WPn_MASK(i));
writeq_relaxed(~0ULL, dtm->base + CMN_DTM_WPn_VAL(i));
}
}
static int arm_cmn_init_dtc(struct arm_cmn *cmn, struct arm_cmn_node *dn, int idx)
{
struct arm_cmn_dtc *dtc = cmn->dtc + idx;
dtc->base = dn->pmu_base - CMN_PMU_OFFSET;
dtc->irq = platform_get_irq(to_platform_device(cmn->dev), idx);
if (dtc->irq < 0)
return dtc->irq;
writel_relaxed(0, dtc->base + CMN_DT_PMCR);
writel_relaxed(0x1ff, dtc->base + CMN_DT_PMOVSR_CLR);
writel_relaxed(CMN_DT_PMCR_OVFL_INTR_EN, dtc->base + CMN_DT_PMCR);
return 0;
}
static int arm_cmn_node_cmp(const void *a, const void *b)
{
const struct arm_cmn_node *dna = a, *dnb = b;
int cmp;
cmp = dna->type - dnb->type;
if (!cmp)
cmp = dna->logid - dnb->logid;
return cmp;
}
static int arm_cmn_init_dtcs(struct arm_cmn *cmn)
{
struct arm_cmn_node *dn, *xp;
int dtc_idx = 0;
u8 dtcs_present = (1 << cmn->num_dtcs) - 1;
cmn->dtc = devm_kcalloc(cmn->dev, cmn->num_dtcs, sizeof(cmn->dtc[0]), GFP_KERNEL);
if (!cmn->dtc)
return -ENOMEM;
sort(cmn->dns, cmn->num_dns, sizeof(cmn->dns[0]), arm_cmn_node_cmp, NULL);
cmn->xps = arm_cmn_node(cmn, CMN_TYPE_XP);
for (dn = cmn->dns; dn->type; dn++) {
if (dn->type == CMN_TYPE_XP) {
dn->dtc &= dtcs_present;
continue;
}
xp = arm_cmn_node_to_xp(cmn, dn);
dn->dtm = xp->dtm;
if (cmn->multi_dtm)
dn->dtm += arm_cmn_nid(cmn, dn->id).port / 2;
if (dn->type == CMN_TYPE_DTC) {
int err;
/* We do at least know that a DTC's XP must be in that DTC's domain */
if (xp->dtc == 0xf)
xp->dtc = 1 << dtc_idx;
err = arm_cmn_init_dtc(cmn, dn, dtc_idx++);
if (err)
return err;
}
/* To the PMU, RN-Ds don't add anything over RN-Is, so smoosh them together */
if (dn->type == CMN_TYPE_RND)
dn->type = CMN_TYPE_RNI;
/* We split the RN-I off already, so let the CCLA part match CCLA events */
if (dn->type == CMN_TYPE_CCLA_RNI)
dn->type = CMN_TYPE_CCLA;
}
writel_relaxed(CMN_DT_DTC_CTL_DT_EN, cmn->dtc[0].base + CMN_DT_DTC_CTL);
return 0;
}
static void arm_cmn_init_node_info(struct arm_cmn *cmn, u32 offset, struct arm_cmn_node *node)
{
int level;
u64 reg = readq_relaxed(cmn->base + offset + CMN_NODE_INFO);
node->type = FIELD_GET(CMN_NI_NODE_TYPE, reg);
node->id = FIELD_GET(CMN_NI_NODE_ID, reg);
node->logid = FIELD_GET(CMN_NI_LOGICAL_ID, reg);
node->pmu_base = cmn->base + offset + CMN_PMU_OFFSET;
if (node->type == CMN_TYPE_CFG)
level = 0;
else if (node->type == CMN_TYPE_XP)
level = 1;
else
level = 2;
dev_dbg(cmn->dev, "node%*c%#06hx%*ctype:%-#6x id:%-4hd off:%#x\n",
(level * 2) + 1, ' ', node->id, 5 - (level * 2), ' ',
node->type, node->logid, offset);
}
static enum cmn_node_type arm_cmn_subtype(enum cmn_node_type type)
{
switch (type) {
case CMN_TYPE_HNP:
return CMN_TYPE_HNI;
case CMN_TYPE_CCLA_RNI:
return CMN_TYPE_RNI;
default:
return CMN_TYPE_INVALID;
}
}
static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
{
void __iomem *cfg_region;
struct arm_cmn_node cfg, *dn;
struct arm_cmn_dtm *dtm;
u16 child_count, child_poff;
u32 xp_offset[CMN_MAX_XPS];
u64 reg;
int i, j;
size_t sz;
arm_cmn_init_node_info(cmn, rgn_offset, &cfg);
if (cfg.type != CMN_TYPE_CFG)
return -ENODEV;
cfg_region = cmn->base + rgn_offset;
reg = readl_relaxed(cfg_region + CMN_CFGM_PERIPH_ID_2);
cmn->rev = FIELD_GET(CMN_CFGM_PID2_REVISION, reg);
reg = readq_relaxed(cfg_region + CMN_CFGM_INFO_GLOBAL);
cmn->multi_dtm = reg & CMN_INFO_MULTIPLE_DTM_EN;
cmn->rsp_vc_num = FIELD_GET(CMN_INFO_RSP_VC_NUM, reg);
cmn->dat_vc_num = FIELD_GET(CMN_INFO_DAT_VC_NUM, reg);
reg = readq_relaxed(cfg_region + CMN_CFGM_INFO_GLOBAL_1);
cmn->snp_vc_num = FIELD_GET(CMN_INFO_SNP_VC_NUM, reg);
cmn->req_vc_num = FIELD_GET(CMN_INFO_REQ_VC_NUM, reg);
reg = readq_relaxed(cfg_region + CMN_CHILD_INFO);
child_count = FIELD_GET(CMN_CI_CHILD_COUNT, reg);
child_poff = FIELD_GET(CMN_CI_CHILD_PTR_OFFSET, reg);
cmn->num_xps = child_count;
cmn->num_dns = cmn->num_xps;
/* Pass 1: visit the XPs, enumerate their children */
for (i = 0; i < cmn->num_xps; i++) {
reg = readq_relaxed(cfg_region + child_poff + i * 8);
xp_offset[i] = reg & CMN_CHILD_NODE_ADDR;
reg = readq_relaxed(cmn->base + xp_offset[i] + CMN_CHILD_INFO);
cmn->num_dns += FIELD_GET(CMN_CI_CHILD_COUNT, reg);
}
/*
* Some nodes effectively have two separate types, which we'll handle
* by creating one of each internally. For a (very) safe initial upper
* bound, account for double the number of non-XP nodes.
*/
dn = devm_kcalloc(cmn->dev, cmn->num_dns * 2 - cmn->num_xps,
sizeof(*dn), GFP_KERNEL);
if (!dn)
return -ENOMEM;
/* Initial safe upper bound on DTMs for any possible mesh layout */
i = cmn->num_xps;
if (cmn->multi_dtm)
i += cmn->num_xps + 1;
dtm = devm_kcalloc(cmn->dev, i, sizeof(*dtm), GFP_KERNEL);
if (!dtm)
return -ENOMEM;
/* Pass 2: now we can actually populate the nodes */
cmn->dns = dn;
cmn->dtms = dtm;
for (i = 0; i < cmn->num_xps; i++) {
void __iomem *xp_region = cmn->base + xp_offset[i];
struct arm_cmn_node *xp = dn++;
unsigned int xp_ports = 0;
arm_cmn_init_node_info(cmn, xp_offset[i], xp);
/*
* Thanks to the order in which XP logical IDs seem to be
* assigned, we can handily infer the mesh X dimension by
* looking out for the XP at (0,1) without needing to know
* the exact node ID format, which we can later derive.
*/
if (xp->id == (1 << 3))
cmn->mesh_x = xp->logid;
if (cmn->model == CMN600)
xp->dtc = 0xf;
else
xp->dtc = 1 << readl_relaxed(xp_region + CMN_DTM_UNIT_INFO);
xp->dtm = dtm - cmn->dtms;
arm_cmn_init_dtm(dtm++, xp, 0);
/*
* Keeping track of connected ports will let us filter out
* unnecessary XP events easily. We can also reliably infer the
* "extra device ports" configuration for the node ID format
* from this, since in that case we will see at least one XP
* with port 2 connected, for the HN-D.
*/
if (readq_relaxed(xp_region + CMN_MXP__CONNECT_INFO_P0))
xp_ports |= BIT(0);
if (readq_relaxed(xp_region + CMN_MXP__CONNECT_INFO_P1))
xp_ports |= BIT(1);
if (readq_relaxed(xp_region + CMN_MXP__CONNECT_INFO_P2))
xp_ports |= BIT(2);
if (readq_relaxed(xp_region + CMN_MXP__CONNECT_INFO_P3))
xp_ports |= BIT(3);
if (readq_relaxed(xp_region + CMN_MXP__CONNECT_INFO_P4))
xp_ports |= BIT(4);
if (readq_relaxed(xp_region + CMN_MXP__CONNECT_INFO_P5))
xp_ports |= BIT(5);
if (cmn->multi_dtm && (xp_ports & 0xc))
arm_cmn_init_dtm(dtm++, xp, 1);
if (cmn->multi_dtm && (xp_ports & 0x30))
arm_cmn_init_dtm(dtm++, xp, 2);
cmn->ports_used |= xp_ports;
reg = readq_relaxed(xp_region + CMN_CHILD_INFO);
child_count = FIELD_GET(CMN_CI_CHILD_COUNT, reg);
child_poff = FIELD_GET(CMN_CI_CHILD_PTR_OFFSET, reg);
for (j = 0; j < child_count; j++) {
reg = readq_relaxed(xp_region + child_poff + j * 8);
/*
* Don't even try to touch anything external, since in general
* we haven't a clue how to power up arbitrary CHI requesters.
* As of CMN-600r1 these could only be RN-SAMs or CXLAs,
* neither of which have any PMU events anyway.
* (Actually, CXLAs do seem to have grown some events in r1p2,
* but they don't go to regular XP DTMs, and they depend on
* secure configuration which we can't easily deal with)
*/
if (reg & CMN_CHILD_NODE_EXTERNAL) {
dev_dbg(cmn->dev, "ignoring external node %llx\n", reg);
continue;
}
arm_cmn_init_node_info(cmn, reg & CMN_CHILD_NODE_ADDR, dn);
switch (dn->type) {
case CMN_TYPE_DTC:
cmn->num_dtcs++;
dn++;
break;
/* These guys have PMU events */
case CMN_TYPE_DVM:
case CMN_TYPE_HNI:
case CMN_TYPE_HNF:
case CMN_TYPE_SBSX:
case CMN_TYPE_RNI:
case CMN_TYPE_RND:
case CMN_TYPE_MTSX:
case CMN_TYPE_CXRA:
case CMN_TYPE_CXHA:
case CMN_TYPE_CCRA:
case CMN_TYPE_CCHA:
case CMN_TYPE_CCLA:
dn++;
break;
/* Nothing to see here */
case CMN_TYPE_MPAM_S:
case CMN_TYPE_MPAM_NS:
case CMN_TYPE_RNSAM:
case CMN_TYPE_CXLA:
break;
/*
* Split "optimised" combination nodes into separate
* types for the different event sets. Offsetting the
* base address lets us handle the second pmu_event_sel
* register via the normal mechanism later.
*/
case CMN_TYPE_HNP:
case CMN_TYPE_CCLA_RNI:
dn[1] = dn[0];
dn[0].pmu_base += CMN_HNP_PMU_EVENT_SEL;
dn[1].type = arm_cmn_subtype(dn->type);
dn += 2;
break;
/* Something has gone horribly wrong */
default:
dev_err(cmn->dev, "invalid device node type: 0x%x\n", dn->type);
return -ENODEV;
}
}
}
/* Correct for any nodes we added or skipped */
cmn->num_dns = dn - cmn->dns;
/* Cheeky +1 to help terminate pointer-based iteration later */
sz = (void *)(dn + 1) - (void *)cmn->dns;
dn = devm_krealloc(cmn->dev, cmn->dns, sz, GFP_KERNEL);
if (dn)
cmn->dns = dn;
sz = (void *)dtm - (void *)cmn->dtms;
dtm = devm_krealloc(cmn->dev, cmn->dtms, sz, GFP_KERNEL);
if (dtm)
cmn->dtms = dtm;
/*
* If mesh_x wasn't set during discovery then we never saw
* an XP at (0,1), thus we must have an Nx1 configuration.
*/
if (!cmn->mesh_x)
cmn->mesh_x = cmn->num_xps;
cmn->mesh_y = cmn->num_xps / cmn->mesh_x;
/* 1x1 config plays havoc with XP event encodings */
if (cmn->num_xps == 1)
dev_warn(cmn->dev, "1x1 config not fully supported, translate XP events manually\n");
dev_dbg(cmn->dev, "model %d, periph_id_2 revision %d\n", cmn->model, cmn->rev);
reg = cmn->ports_used;
dev_dbg(cmn->dev, "mesh %dx%d, ID width %d, ports %6pbl%s\n",
cmn->mesh_x, cmn->mesh_y, arm_cmn_xyidbits(cmn), &reg,
cmn->multi_dtm ? ", multi-DTM" : "");
return 0;
}
static int arm_cmn600_acpi_probe(struct platform_device *pdev, struct arm_cmn *cmn)
{
struct resource *cfg, *root;
cfg = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!cfg)
return -EINVAL;
root = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!root)
return -EINVAL;
if (!resource_contains(cfg, root))
swap(cfg, root);
/*
* Note that devm_ioremap_resource() is dumb and won't let the platform
* device claim cfg when the ACPI companion device has already claimed
* root within it. But since they *are* already both claimed in the
* appropriate name, we don't really need to do it again here anyway.
*/
cmn->base = devm_ioremap(cmn->dev, cfg->start, resource_size(cfg));
if (!cmn->base)
return -ENOMEM;
return root->start - cfg->start;
}
static int arm_cmn600_of_probe(struct device_node *np)
{
u32 rootnode;
return of_property_read_u32(np, "arm,root-node", &rootnode) ?: rootnode;
}
static int arm_cmn_probe(struct platform_device *pdev)
{
struct arm_cmn *cmn;
const char *name;
static atomic_t id;
int err, rootnode, this_id;
cmn = devm_kzalloc(&pdev->dev, sizeof(*cmn), GFP_KERNEL);
if (!cmn)
return -ENOMEM;
cmn->dev = &pdev->dev;
cmn->model = (unsigned long)device_get_match_data(cmn->dev);
platform_set_drvdata(pdev, cmn);
if (cmn->model == CMN600 && has_acpi_companion(cmn->dev)) {
rootnode = arm_cmn600_acpi_probe(pdev, cmn);
} else {
rootnode = 0;
cmn->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(cmn->base))
return PTR_ERR(cmn->base);
if (cmn->model == CMN600)
rootnode = arm_cmn600_of_probe(pdev->dev.of_node);
}
if (rootnode < 0)
return rootnode;
err = arm_cmn_discover(cmn, rootnode);
if (err)
return err;
err = arm_cmn_init_dtcs(cmn);
if (err)
return err;
err = arm_cmn_init_irqs(cmn);
if (err)
return err;
cmn->cpu = cpumask_local_spread(0, dev_to_node(cmn->dev));
cmn->pmu = (struct pmu) {
.module = THIS_MODULE,
.attr_groups = arm_cmn_attr_groups,
.capabilities = PERF_PMU_CAP_NO_EXCLUDE,
.task_ctx_nr = perf_invalid_context,
.pmu_enable = arm_cmn_pmu_enable,
.pmu_disable = arm_cmn_pmu_disable,
.event_init = arm_cmn_event_init,
.add = arm_cmn_event_add,
.del = arm_cmn_event_del,
.start = arm_cmn_event_start,
.stop = arm_cmn_event_stop,
.read = arm_cmn_event_read,
.start_txn = arm_cmn_start_txn,
.commit_txn = arm_cmn_commit_txn,
.cancel_txn = arm_cmn_end_txn,
};
this_id = atomic_fetch_inc(&id);
name = devm_kasprintf(cmn->dev, GFP_KERNEL, "arm_cmn_%d", this_id);
if (!name)
return -ENOMEM;
err = cpuhp_state_add_instance(arm_cmn_hp_state, &cmn->cpuhp_node);
if (err)
return err;
err = perf_pmu_register(&cmn->pmu, name, -1);
if (err)
cpuhp_state_remove_instance_nocalls(arm_cmn_hp_state, &cmn->cpuhp_node);
else
arm_cmn_debugfs_init(cmn, this_id);
return err;
}
static int arm_cmn_remove(struct platform_device *pdev)
{
struct arm_cmn *cmn = platform_get_drvdata(pdev);
writel_relaxed(0, cmn->dtc[0].base + CMN_DT_DTC_CTL);
perf_pmu_unregister(&cmn->pmu);
cpuhp_state_remove_instance_nocalls(arm_cmn_hp_state, &cmn->cpuhp_node);
debugfs_remove(cmn->debug);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id arm_cmn_of_match[] = {
{ .compatible = "arm,cmn-600", .data = (void *)CMN600 },
{ .compatible = "arm,cmn-650", .data = (void *)CMN650 },
{ .compatible = "arm,cmn-700", .data = (void *)CMN700 },
{ .compatible = "arm,ci-700", .data = (void *)CI700 },
{}
};
MODULE_DEVICE_TABLE(of, arm_cmn_of_match);
#endif
#ifdef CONFIG_ACPI
static const struct acpi_device_id arm_cmn_acpi_match[] = {
{ "ARMHC600", CMN600 },
{ "ARMHC650", CMN650 },
{ "ARMHC700", CMN700 },
{}
};
MODULE_DEVICE_TABLE(acpi, arm_cmn_acpi_match);
#endif
static struct platform_driver arm_cmn_driver = {
.driver = {
.name = "arm-cmn",
.of_match_table = of_match_ptr(arm_cmn_of_match),
.acpi_match_table = ACPI_PTR(arm_cmn_acpi_match),
},
.probe = arm_cmn_probe,
.remove = arm_cmn_remove,
};
static int __init arm_cmn_init(void)
{
int ret;
ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN,
"perf/arm/cmn:online",
arm_cmn_pmu_online_cpu,
arm_cmn_pmu_offline_cpu);
if (ret < 0)
return ret;
arm_cmn_hp_state = ret;
arm_cmn_debugfs = debugfs_create_dir("arm-cmn", NULL);
ret = platform_driver_register(&arm_cmn_driver);
if (ret) {
cpuhp_remove_multi_state(arm_cmn_hp_state);
debugfs_remove(arm_cmn_debugfs);
}
return ret;
}
static void __exit arm_cmn_exit(void)
{
platform_driver_unregister(&arm_cmn_driver);
cpuhp_remove_multi_state(arm_cmn_hp_state);
debugfs_remove(arm_cmn_debugfs);
}
module_init(arm_cmn_init);
module_exit(arm_cmn_exit);
MODULE_AUTHOR("Robin Murphy <robin.murphy@arm.com>");
MODULE_DESCRIPTION("Arm CMN-600 PMU driver");
MODULE_LICENSE("GPL v2");
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