1394 lines
41 KiB
C
1394 lines
41 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Copyright (C) 2014 ARM Limited
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*/
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#include <linux/ctype.h>
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#include <linux/hrtimer.h>
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#include <linux/idr.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/perf_event.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#define CCN_NUM_XP_PORTS 2
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#define CCN_NUM_VCS 4
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#define CCN_NUM_REGIONS 256
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#define CCN_REGION_SIZE 0x10000
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#define CCN_ALL_OLY_ID 0xff00
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#define CCN_ALL_OLY_ID__OLY_ID__SHIFT 0
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#define CCN_ALL_OLY_ID__OLY_ID__MASK 0x1f
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#define CCN_ALL_OLY_ID__NODE_ID__SHIFT 8
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#define CCN_ALL_OLY_ID__NODE_ID__MASK 0x3f
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#define CCN_MN_ERRINT_STATUS 0x0008
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#define CCN_MN_ERRINT_STATUS__INTREQ__DESSERT 0x11
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#define CCN_MN_ERRINT_STATUS__ALL_ERRORS__ENABLE 0x02
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#define CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLED 0x20
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#define CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLE 0x22
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#define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_ENABLE 0x04
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#define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_DISABLED 0x40
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#define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_DISABLE 0x44
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#define CCN_MN_ERRINT_STATUS__PMU_EVENTS__ENABLE 0x08
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#define CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLED 0x80
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#define CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLE 0x88
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#define CCN_MN_OLY_COMP_LIST_63_0 0x01e0
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#define CCN_MN_ERR_SIG_VAL_63_0 0x0300
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#define CCN_MN_ERR_SIG_VAL_63_0__DT (1 << 1)
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#define CCN_DT_ACTIVE_DSM 0x0000
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#define CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(n) ((n) * 8)
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#define CCN_DT_ACTIVE_DSM__DSM_ID__MASK 0xff
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#define CCN_DT_CTL 0x0028
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#define CCN_DT_CTL__DT_EN (1 << 0)
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#define CCN_DT_PMEVCNT(n) (0x0100 + (n) * 0x8)
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#define CCN_DT_PMCCNTR 0x0140
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#define CCN_DT_PMCCNTRSR 0x0190
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#define CCN_DT_PMOVSR 0x0198
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#define CCN_DT_PMOVSR_CLR 0x01a0
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#define CCN_DT_PMOVSR_CLR__MASK 0x1f
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#define CCN_DT_PMCR 0x01a8
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#define CCN_DT_PMCR__OVFL_INTR_EN (1 << 6)
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#define CCN_DT_PMCR__PMU_EN (1 << 0)
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#define CCN_DT_PMSR 0x01b0
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#define CCN_DT_PMSR_REQ 0x01b8
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#define CCN_DT_PMSR_CLR 0x01c0
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#define CCN_HNF_PMU_EVENT_SEL 0x0600
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#define CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4)
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#define CCN_HNF_PMU_EVENT_SEL__ID__MASK 0xf
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#define CCN_XP_DT_CONFIG 0x0300
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#define CCN_XP_DT_CONFIG__DT_CFG__SHIFT(n) ((n) * 4)
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#define CCN_XP_DT_CONFIG__DT_CFG__MASK 0xf
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#define CCN_XP_DT_CONFIG__DT_CFG__PASS_THROUGH 0x0
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#define CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT_0_OR_1 0x1
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#define CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT(n) (0x2 + (n))
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#define CCN_XP_DT_CONFIG__DT_CFG__XP_PMU_EVENT(n) (0x4 + (n))
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#define CCN_XP_DT_CONFIG__DT_CFG__DEVICE_PMU_EVENT(d, n) (0x8 + (d) * 4 + (n))
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#define CCN_XP_DT_INTERFACE_SEL 0x0308
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#define CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(n) (0 + (n) * 8)
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#define CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__MASK 0x1
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#define CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(n) (1 + (n) * 8)
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#define CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__MASK 0x1
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#define CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(n) (2 + (n) * 8)
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#define CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__MASK 0x3
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#define CCN_XP_DT_CMP_VAL_L(n) (0x0310 + (n) * 0x40)
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#define CCN_XP_DT_CMP_VAL_H(n) (0x0318 + (n) * 0x40)
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#define CCN_XP_DT_CMP_MASK_L(n) (0x0320 + (n) * 0x40)
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#define CCN_XP_DT_CMP_MASK_H(n) (0x0328 + (n) * 0x40)
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#define CCN_XP_DT_CONTROL 0x0370
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#define CCN_XP_DT_CONTROL__DT_ENABLE (1 << 0)
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#define CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(n) (12 + (n) * 4)
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#define CCN_XP_DT_CONTROL__WP_ARM_SEL__MASK 0xf
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#define CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS 0xf
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#define CCN_XP_PMU_EVENT_SEL 0x0600
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#define CCN_XP_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 7)
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#define CCN_XP_PMU_EVENT_SEL__ID__MASK 0x3f
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#define CCN_SBAS_PMU_EVENT_SEL 0x0600
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#define CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4)
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#define CCN_SBAS_PMU_EVENT_SEL__ID__MASK 0xf
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#define CCN_RNI_PMU_EVENT_SEL 0x0600
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#define CCN_RNI_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4)
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#define CCN_RNI_PMU_EVENT_SEL__ID__MASK 0xf
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#define CCN_TYPE_MN 0x01
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#define CCN_TYPE_DT 0x02
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#define CCN_TYPE_HNF 0x04
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#define CCN_TYPE_HNI 0x05
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#define CCN_TYPE_XP 0x08
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#define CCN_TYPE_SBSX 0x0c
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#define CCN_TYPE_SBAS 0x10
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#define CCN_TYPE_RNI_1P 0x14
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#define CCN_TYPE_RNI_2P 0x15
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#define CCN_TYPE_RNI_3P 0x16
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#define CCN_TYPE_RND_1P 0x18 /* RN-D = RN-I + DVM */
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#define CCN_TYPE_RND_2P 0x19
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#define CCN_TYPE_RND_3P 0x1a
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#define CCN_TYPE_CYCLES 0xff /* Pseudotype */
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#define CCN_EVENT_WATCHPOINT 0xfe /* Pseudoevent */
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#define CCN_NUM_PMU_EVENTS 4
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#define CCN_NUM_XP_WATCHPOINTS 2 /* See DT.dbg_id.num_watchpoints */
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#define CCN_NUM_PMU_EVENT_COUNTERS 8 /* See DT.dbg_id.num_pmucntr */
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#define CCN_IDX_PMU_CYCLE_COUNTER CCN_NUM_PMU_EVENT_COUNTERS
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#define CCN_NUM_PREDEFINED_MASKS 4
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#define CCN_IDX_MASK_ANY (CCN_NUM_PMU_EVENT_COUNTERS + 0)
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#define CCN_IDX_MASK_EXACT (CCN_NUM_PMU_EVENT_COUNTERS + 1)
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#define CCN_IDX_MASK_ORDER (CCN_NUM_PMU_EVENT_COUNTERS + 2)
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#define CCN_IDX_MASK_OPCODE (CCN_NUM_PMU_EVENT_COUNTERS + 3)
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struct arm_ccn_component {
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void __iomem *base;
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u32 type;
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DECLARE_BITMAP(pmu_events_mask, CCN_NUM_PMU_EVENTS);
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union {
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struct {
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DECLARE_BITMAP(dt_cmp_mask, CCN_NUM_XP_WATCHPOINTS);
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} xp;
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};
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};
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#define pmu_to_arm_ccn(_pmu) container_of(container_of(_pmu, \
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struct arm_ccn_dt, pmu), struct arm_ccn, dt)
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struct arm_ccn_dt {
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int id;
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void __iomem *base;
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spinlock_t config_lock;
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DECLARE_BITMAP(pmu_counters_mask, CCN_NUM_PMU_EVENT_COUNTERS + 1);
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struct {
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struct arm_ccn_component *source;
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struct perf_event *event;
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} pmu_counters[CCN_NUM_PMU_EVENT_COUNTERS + 1];
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struct {
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u64 l, h;
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} cmp_mask[CCN_NUM_PMU_EVENT_COUNTERS + CCN_NUM_PREDEFINED_MASKS];
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struct hrtimer hrtimer;
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struct pmu pmu;
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};
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struct arm_ccn {
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struct device *dev;
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void __iomem *base;
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unsigned irq_used:1;
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unsigned sbas_present:1;
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unsigned sbsx_present:1;
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int num_nodes;
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struct arm_ccn_component *node;
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int num_xps;
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struct arm_ccn_component *xp;
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struct arm_ccn_dt dt;
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};
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static int arm_ccn_node_to_xp(int node)
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{
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return node / CCN_NUM_XP_PORTS;
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}
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static int arm_ccn_node_to_xp_port(int node)
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{
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return node % CCN_NUM_XP_PORTS;
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}
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/*
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* Bit shifts and masks in these defines must be kept in sync with
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* arm_ccn_pmu_config_set() and CCN_FORMAT_ATTRs below!
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*/
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#define CCN_CONFIG_NODE(_config) (((_config) >> 0) & 0xff)
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#define CCN_CONFIG_XP(_config) (((_config) >> 0) & 0xff)
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#define CCN_CONFIG_TYPE(_config) (((_config) >> 8) & 0xff)
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#define CCN_CONFIG_EVENT(_config) (((_config) >> 16) & 0xff)
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#define CCN_CONFIG_PORT(_config) (((_config) >> 24) & 0x3)
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#define CCN_CONFIG_VC(_config) (((_config) >> 26) & 0x7)
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#define CCN_CONFIG_DIR(_config) (((_config) >> 29) & 0x1)
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#define CCN_CONFIG_MASK(_config) (((_config) >> 30) & 0xf)
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static void arm_ccn_pmu_config_set(u64 *config, u32 node_xp, u32 type, u32 port)
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{
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*config &= ~((0xff << 0) | (0xff << 8) | (0xff << 24));
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*config |= (node_xp << 0) | (type << 8) | (port << 24);
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}
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static ssize_t arm_ccn_pmu_format_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct dev_ext_attribute *ea = container_of(attr,
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struct dev_ext_attribute, attr);
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return snprintf(buf, PAGE_SIZE, "%s\n", (char *)ea->var);
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}
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#define CCN_FORMAT_ATTR(_name, _config) \
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struct dev_ext_attribute arm_ccn_pmu_format_attr_##_name = \
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{ __ATTR(_name, S_IRUGO, arm_ccn_pmu_format_show, \
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NULL), _config }
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static CCN_FORMAT_ATTR(node, "config:0-7");
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static CCN_FORMAT_ATTR(xp, "config:0-7");
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static CCN_FORMAT_ATTR(type, "config:8-15");
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static CCN_FORMAT_ATTR(event, "config:16-23");
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static CCN_FORMAT_ATTR(port, "config:24-25");
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static CCN_FORMAT_ATTR(vc, "config:26-28");
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static CCN_FORMAT_ATTR(dir, "config:29-29");
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static CCN_FORMAT_ATTR(mask, "config:30-33");
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static CCN_FORMAT_ATTR(cmp_l, "config1:0-62");
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static CCN_FORMAT_ATTR(cmp_h, "config2:0-59");
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static struct attribute *arm_ccn_pmu_format_attrs[] = {
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&arm_ccn_pmu_format_attr_node.attr.attr,
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&arm_ccn_pmu_format_attr_xp.attr.attr,
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&arm_ccn_pmu_format_attr_type.attr.attr,
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&arm_ccn_pmu_format_attr_event.attr.attr,
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&arm_ccn_pmu_format_attr_port.attr.attr,
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&arm_ccn_pmu_format_attr_vc.attr.attr,
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&arm_ccn_pmu_format_attr_dir.attr.attr,
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&arm_ccn_pmu_format_attr_mask.attr.attr,
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&arm_ccn_pmu_format_attr_cmp_l.attr.attr,
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&arm_ccn_pmu_format_attr_cmp_h.attr.attr,
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NULL
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};
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static struct attribute_group arm_ccn_pmu_format_attr_group = {
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.name = "format",
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.attrs = arm_ccn_pmu_format_attrs,
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};
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struct arm_ccn_pmu_event {
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struct device_attribute attr;
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u32 type;
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u32 event;
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int num_ports;
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int num_vcs;
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const char *def;
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int mask;
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};
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#define CCN_EVENT_ATTR(_name) \
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__ATTR(_name, S_IRUGO, arm_ccn_pmu_event_show, NULL)
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/*
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* Events defined in TRM for MN, HN-I and SBSX are actually watchpoints set on
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* their ports in XP they are connected to. For the sake of usability they are
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* explicitly defined here (and translated into a relevant watchpoint in
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* arm_ccn_pmu_event_init()) so the user can easily request them without deep
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* knowledge of the flit format.
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*/
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#define CCN_EVENT_MN(_name, _def, _mask) { .attr = CCN_EVENT_ATTR(mn_##_name), \
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.type = CCN_TYPE_MN, .event = CCN_EVENT_WATCHPOINT, \
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.num_ports = CCN_NUM_XP_PORTS, .num_vcs = CCN_NUM_VCS, \
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.def = _def, .mask = _mask, }
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#define CCN_EVENT_HNI(_name, _def, _mask) { \
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.attr = CCN_EVENT_ATTR(hni_##_name), .type = CCN_TYPE_HNI, \
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.event = CCN_EVENT_WATCHPOINT, .num_ports = CCN_NUM_XP_PORTS, \
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.num_vcs = CCN_NUM_VCS, .def = _def, .mask = _mask, }
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#define CCN_EVENT_SBSX(_name, _def, _mask) { \
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.attr = CCN_EVENT_ATTR(sbsx_##_name), .type = CCN_TYPE_SBSX, \
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.event = CCN_EVENT_WATCHPOINT, .num_ports = CCN_NUM_XP_PORTS, \
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.num_vcs = CCN_NUM_VCS, .def = _def, .mask = _mask, }
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#define CCN_EVENT_HNF(_name, _event) { .attr = CCN_EVENT_ATTR(hnf_##_name), \
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.type = CCN_TYPE_HNF, .event = _event, }
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#define CCN_EVENT_XP(_name, _event) { .attr = CCN_EVENT_ATTR(xp_##_name), \
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.type = CCN_TYPE_XP, .event = _event, \
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.num_ports = CCN_NUM_XP_PORTS, .num_vcs = CCN_NUM_VCS, }
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/*
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* RN-I & RN-D (RN-D = RN-I + DVM) nodes have different type ID depending
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* on configuration. One of them is picked to represent the whole group,
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* as they all share the same event types.
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*/
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#define CCN_EVENT_RNI(_name, _event) { .attr = CCN_EVENT_ATTR(rni_##_name), \
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.type = CCN_TYPE_RNI_3P, .event = _event, }
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#define CCN_EVENT_SBAS(_name, _event) { .attr = CCN_EVENT_ATTR(sbas_##_name), \
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.type = CCN_TYPE_SBAS, .event = _event, }
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#define CCN_EVENT_CYCLES(_name) { .attr = CCN_EVENT_ATTR(_name), \
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.type = CCN_TYPE_CYCLES }
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static ssize_t arm_ccn_pmu_event_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct arm_ccn_pmu_event *event = container_of(attr,
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struct arm_ccn_pmu_event, attr);
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ssize_t res;
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res = snprintf(buf, PAGE_SIZE, "type=0x%x", event->type);
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if (event->event)
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res += snprintf(buf + res, PAGE_SIZE - res, ",event=0x%x",
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event->event);
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if (event->def)
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res += snprintf(buf + res, PAGE_SIZE - res, ",%s",
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event->def);
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if (event->mask)
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res += snprintf(buf + res, PAGE_SIZE - res, ",mask=0x%x",
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event->mask);
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res += snprintf(buf + res, PAGE_SIZE - res, "\n");
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return res;
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}
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static umode_t arm_ccn_pmu_events_is_visible(struct kobject *kobj,
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struct attribute *attr, int index)
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{
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struct device *dev = kobj_to_dev(kobj);
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struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
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struct device_attribute *dev_attr = container_of(attr,
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struct device_attribute, attr);
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struct arm_ccn_pmu_event *event = container_of(dev_attr,
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struct arm_ccn_pmu_event, attr);
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if (event->type == CCN_TYPE_SBAS && !ccn->sbas_present)
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return 0;
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if (event->type == CCN_TYPE_SBSX && !ccn->sbsx_present)
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return 0;
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return attr->mode;
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}
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static struct arm_ccn_pmu_event arm_ccn_pmu_events[] = {
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CCN_EVENT_MN(eobarrier, "dir=0,vc=0,cmp_h=0x1c00", CCN_IDX_MASK_OPCODE),
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CCN_EVENT_MN(ecbarrier, "dir=0,vc=0,cmp_h=0x1e00", CCN_IDX_MASK_OPCODE),
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CCN_EVENT_MN(dvmop, "dir=0,vc=0,cmp_h=0x2800", CCN_IDX_MASK_OPCODE),
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CCN_EVENT_HNI(txdatflits, "dir=1,vc=3", CCN_IDX_MASK_ANY),
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CCN_EVENT_HNI(rxdatflits, "dir=0,vc=3", CCN_IDX_MASK_ANY),
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CCN_EVENT_HNI(txreqflits, "dir=1,vc=0", CCN_IDX_MASK_ANY),
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CCN_EVENT_HNI(rxreqflits, "dir=0,vc=0", CCN_IDX_MASK_ANY),
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CCN_EVENT_HNI(rxreqflits_order, "dir=0,vc=0,cmp_h=0x8000",
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CCN_IDX_MASK_ORDER),
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CCN_EVENT_SBSX(txdatflits, "dir=1,vc=3", CCN_IDX_MASK_ANY),
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CCN_EVENT_SBSX(rxdatflits, "dir=0,vc=3", CCN_IDX_MASK_ANY),
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CCN_EVENT_SBSX(txreqflits, "dir=1,vc=0", CCN_IDX_MASK_ANY),
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CCN_EVENT_SBSX(rxreqflits, "dir=0,vc=0", CCN_IDX_MASK_ANY),
|
|
CCN_EVENT_SBSX(rxreqflits_order, "dir=0,vc=0,cmp_h=0x8000",
|
|
CCN_IDX_MASK_ORDER),
|
|
CCN_EVENT_HNF(cache_miss, 0x1),
|
|
CCN_EVENT_HNF(l3_sf_cache_access, 0x02),
|
|
CCN_EVENT_HNF(cache_fill, 0x3),
|
|
CCN_EVENT_HNF(pocq_retry, 0x4),
|
|
CCN_EVENT_HNF(pocq_reqs_recvd, 0x5),
|
|
CCN_EVENT_HNF(sf_hit, 0x6),
|
|
CCN_EVENT_HNF(sf_evictions, 0x7),
|
|
CCN_EVENT_HNF(snoops_sent, 0x8),
|
|
CCN_EVENT_HNF(snoops_broadcast, 0x9),
|
|
CCN_EVENT_HNF(l3_eviction, 0xa),
|
|
CCN_EVENT_HNF(l3_fill_invalid_way, 0xb),
|
|
CCN_EVENT_HNF(mc_retries, 0xc),
|
|
CCN_EVENT_HNF(mc_reqs, 0xd),
|
|
CCN_EVENT_HNF(qos_hh_retry, 0xe),
|
|
CCN_EVENT_RNI(rdata_beats_p0, 0x1),
|
|
CCN_EVENT_RNI(rdata_beats_p1, 0x2),
|
|
CCN_EVENT_RNI(rdata_beats_p2, 0x3),
|
|
CCN_EVENT_RNI(rxdat_flits, 0x4),
|
|
CCN_EVENT_RNI(txdat_flits, 0x5),
|
|
CCN_EVENT_RNI(txreq_flits, 0x6),
|
|
CCN_EVENT_RNI(txreq_flits_retried, 0x7),
|
|
CCN_EVENT_RNI(rrt_full, 0x8),
|
|
CCN_EVENT_RNI(wrt_full, 0x9),
|
|
CCN_EVENT_RNI(txreq_flits_replayed, 0xa),
|
|
CCN_EVENT_XP(upload_starvation, 0x1),
|
|
CCN_EVENT_XP(download_starvation, 0x2),
|
|
CCN_EVENT_XP(respin, 0x3),
|
|
CCN_EVENT_XP(valid_flit, 0x4),
|
|
CCN_EVENT_XP(watchpoint, CCN_EVENT_WATCHPOINT),
|
|
CCN_EVENT_SBAS(rdata_beats_p0, 0x1),
|
|
CCN_EVENT_SBAS(rxdat_flits, 0x4),
|
|
CCN_EVENT_SBAS(txdat_flits, 0x5),
|
|
CCN_EVENT_SBAS(txreq_flits, 0x6),
|
|
CCN_EVENT_SBAS(txreq_flits_retried, 0x7),
|
|
CCN_EVENT_SBAS(rrt_full, 0x8),
|
|
CCN_EVENT_SBAS(wrt_full, 0x9),
|
|
CCN_EVENT_SBAS(txreq_flits_replayed, 0xa),
|
|
CCN_EVENT_CYCLES(cycles),
|
|
};
|
|
|
|
/* Populated in arm_ccn_init() */
|
|
static struct attribute
|
|
*arm_ccn_pmu_events_attrs[ARRAY_SIZE(arm_ccn_pmu_events) + 1];
|
|
|
|
static struct attribute_group arm_ccn_pmu_events_attr_group = {
|
|
.name = "events",
|
|
.is_visible = arm_ccn_pmu_events_is_visible,
|
|
.attrs = arm_ccn_pmu_events_attrs,
|
|
};
|
|
|
|
|
|
static u64 *arm_ccn_pmu_get_cmp_mask(struct arm_ccn *ccn, const char *name)
|
|
{
|
|
unsigned long i;
|
|
|
|
if (WARN_ON(!name || !name[0] || !isxdigit(name[0]) || !name[1]))
|
|
return NULL;
|
|
i = isdigit(name[0]) ? name[0] - '0' : 0xa + tolower(name[0]) - 'a';
|
|
|
|
switch (name[1]) {
|
|
case 'l':
|
|
return &ccn->dt.cmp_mask[i].l;
|
|
case 'h':
|
|
return &ccn->dt.cmp_mask[i].h;
|
|
default:
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static ssize_t arm_ccn_pmu_cmp_mask_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
|
|
u64 *mask = arm_ccn_pmu_get_cmp_mask(ccn, attr->attr.name);
|
|
|
|
return mask ? snprintf(buf, PAGE_SIZE, "0x%016llx\n", *mask) : -EINVAL;
|
|
}
|
|
|
|
static ssize_t arm_ccn_pmu_cmp_mask_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
|
|
u64 *mask = arm_ccn_pmu_get_cmp_mask(ccn, attr->attr.name);
|
|
int err = -EINVAL;
|
|
|
|
if (mask)
|
|
err = kstrtoull(buf, 0, mask);
|
|
|
|
return err ? err : count;
|
|
}
|
|
|
|
#define CCN_CMP_MASK_ATTR(_name) \
|
|
struct device_attribute arm_ccn_pmu_cmp_mask_attr_##_name = \
|
|
__ATTR(_name, S_IRUGO | S_IWUSR, \
|
|
arm_ccn_pmu_cmp_mask_show, arm_ccn_pmu_cmp_mask_store)
|
|
|
|
#define CCN_CMP_MASK_ATTR_RO(_name) \
|
|
struct device_attribute arm_ccn_pmu_cmp_mask_attr_##_name = \
|
|
__ATTR(_name, S_IRUGO, arm_ccn_pmu_cmp_mask_show, NULL)
|
|
|
|
static CCN_CMP_MASK_ATTR(0l);
|
|
static CCN_CMP_MASK_ATTR(0h);
|
|
static CCN_CMP_MASK_ATTR(1l);
|
|
static CCN_CMP_MASK_ATTR(1h);
|
|
static CCN_CMP_MASK_ATTR(2l);
|
|
static CCN_CMP_MASK_ATTR(2h);
|
|
static CCN_CMP_MASK_ATTR(3l);
|
|
static CCN_CMP_MASK_ATTR(3h);
|
|
static CCN_CMP_MASK_ATTR(4l);
|
|
static CCN_CMP_MASK_ATTR(4h);
|
|
static CCN_CMP_MASK_ATTR(5l);
|
|
static CCN_CMP_MASK_ATTR(5h);
|
|
static CCN_CMP_MASK_ATTR(6l);
|
|
static CCN_CMP_MASK_ATTR(6h);
|
|
static CCN_CMP_MASK_ATTR(7l);
|
|
static CCN_CMP_MASK_ATTR(7h);
|
|
static CCN_CMP_MASK_ATTR_RO(8l);
|
|
static CCN_CMP_MASK_ATTR_RO(8h);
|
|
static CCN_CMP_MASK_ATTR_RO(9l);
|
|
static CCN_CMP_MASK_ATTR_RO(9h);
|
|
static CCN_CMP_MASK_ATTR_RO(al);
|
|
static CCN_CMP_MASK_ATTR_RO(ah);
|
|
static CCN_CMP_MASK_ATTR_RO(bl);
|
|
static CCN_CMP_MASK_ATTR_RO(bh);
|
|
|
|
static struct attribute *arm_ccn_pmu_cmp_mask_attrs[] = {
|
|
&arm_ccn_pmu_cmp_mask_attr_0l.attr, &arm_ccn_pmu_cmp_mask_attr_0h.attr,
|
|
&arm_ccn_pmu_cmp_mask_attr_1l.attr, &arm_ccn_pmu_cmp_mask_attr_1h.attr,
|
|
&arm_ccn_pmu_cmp_mask_attr_2l.attr, &arm_ccn_pmu_cmp_mask_attr_2h.attr,
|
|
&arm_ccn_pmu_cmp_mask_attr_3l.attr, &arm_ccn_pmu_cmp_mask_attr_3h.attr,
|
|
&arm_ccn_pmu_cmp_mask_attr_4l.attr, &arm_ccn_pmu_cmp_mask_attr_4h.attr,
|
|
&arm_ccn_pmu_cmp_mask_attr_5l.attr, &arm_ccn_pmu_cmp_mask_attr_5h.attr,
|
|
&arm_ccn_pmu_cmp_mask_attr_6l.attr, &arm_ccn_pmu_cmp_mask_attr_6h.attr,
|
|
&arm_ccn_pmu_cmp_mask_attr_7l.attr, &arm_ccn_pmu_cmp_mask_attr_7h.attr,
|
|
&arm_ccn_pmu_cmp_mask_attr_8l.attr, &arm_ccn_pmu_cmp_mask_attr_8h.attr,
|
|
&arm_ccn_pmu_cmp_mask_attr_9l.attr, &arm_ccn_pmu_cmp_mask_attr_9h.attr,
|
|
&arm_ccn_pmu_cmp_mask_attr_al.attr, &arm_ccn_pmu_cmp_mask_attr_ah.attr,
|
|
&arm_ccn_pmu_cmp_mask_attr_bl.attr, &arm_ccn_pmu_cmp_mask_attr_bh.attr,
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group arm_ccn_pmu_cmp_mask_attr_group = {
|
|
.name = "cmp_mask",
|
|
.attrs = arm_ccn_pmu_cmp_mask_attrs,
|
|
};
|
|
|
|
|
|
/*
|
|
* Default poll period is 10ms, which is way over the top anyway,
|
|
* as in the worst case scenario (an event every cycle), with 1GHz
|
|
* clocked bus, the smallest, 32 bit counter will overflow in
|
|
* more than 4s.
|
|
*/
|
|
static unsigned int arm_ccn_pmu_poll_period_us = 10000;
|
|
module_param_named(pmu_poll_period_us, arm_ccn_pmu_poll_period_us, uint,
|
|
S_IRUGO | S_IWUSR);
|
|
|
|
static ktime_t arm_ccn_pmu_timer_period(void)
|
|
{
|
|
return ns_to_ktime((u64)arm_ccn_pmu_poll_period_us * 1000);
|
|
}
|
|
|
|
|
|
static const struct attribute_group *arm_ccn_pmu_attr_groups[] = {
|
|
&arm_ccn_pmu_events_attr_group,
|
|
&arm_ccn_pmu_format_attr_group,
|
|
&arm_ccn_pmu_cmp_mask_attr_group,
|
|
NULL
|
|
};
|
|
|
|
|
|
static int arm_ccn_pmu_alloc_bit(unsigned long *bitmap, unsigned long size)
|
|
{
|
|
int bit;
|
|
|
|
do {
|
|
bit = find_first_zero_bit(bitmap, size);
|
|
if (bit >= size)
|
|
return -EAGAIN;
|
|
} while (test_and_set_bit(bit, bitmap));
|
|
|
|
return bit;
|
|
}
|
|
|
|
/* All RN-I and RN-D nodes have identical PMUs */
|
|
static int arm_ccn_pmu_type_eq(u32 a, u32 b)
|
|
{
|
|
if (a == b)
|
|
return 1;
|
|
|
|
switch (a) {
|
|
case CCN_TYPE_RNI_1P:
|
|
case CCN_TYPE_RNI_2P:
|
|
case CCN_TYPE_RNI_3P:
|
|
case CCN_TYPE_RND_1P:
|
|
case CCN_TYPE_RND_2P:
|
|
case CCN_TYPE_RND_3P:
|
|
switch (b) {
|
|
case CCN_TYPE_RNI_1P:
|
|
case CCN_TYPE_RNI_2P:
|
|
case CCN_TYPE_RNI_3P:
|
|
case CCN_TYPE_RND_1P:
|
|
case CCN_TYPE_RND_2P:
|
|
case CCN_TYPE_RND_3P:
|
|
return 1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void arm_ccn_pmu_event_destroy(struct perf_event *event)
|
|
{
|
|
struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
|
|
struct hw_perf_event *hw = &event->hw;
|
|
|
|
if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER) {
|
|
clear_bit(CCN_IDX_PMU_CYCLE_COUNTER, ccn->dt.pmu_counters_mask);
|
|
} else {
|
|
struct arm_ccn_component *source =
|
|
ccn->dt.pmu_counters[hw->idx].source;
|
|
|
|
if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP &&
|
|
CCN_CONFIG_EVENT(event->attr.config) ==
|
|
CCN_EVENT_WATCHPOINT)
|
|
clear_bit(hw->config_base, source->xp.dt_cmp_mask);
|
|
else
|
|
clear_bit(hw->config_base, source->pmu_events_mask);
|
|
clear_bit(hw->idx, ccn->dt.pmu_counters_mask);
|
|
}
|
|
|
|
ccn->dt.pmu_counters[hw->idx].source = NULL;
|
|
ccn->dt.pmu_counters[hw->idx].event = NULL;
|
|
}
|
|
|
|
static int arm_ccn_pmu_event_init(struct perf_event *event)
|
|
{
|
|
struct arm_ccn *ccn;
|
|
struct hw_perf_event *hw = &event->hw;
|
|
u32 node_xp, type, event_id;
|
|
int valid, bit;
|
|
struct arm_ccn_component *source;
|
|
int i;
|
|
|
|
if (event->attr.type != event->pmu->type)
|
|
return -ENOENT;
|
|
|
|
ccn = pmu_to_arm_ccn(event->pmu);
|
|
event->destroy = arm_ccn_pmu_event_destroy;
|
|
|
|
if (hw->sample_period) {
|
|
dev_warn(ccn->dev, "Sampling not supported!\n");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (has_branch_stack(event) || event->attr.exclude_user ||
|
|
event->attr.exclude_kernel || event->attr.exclude_hv ||
|
|
event->attr.exclude_idle) {
|
|
dev_warn(ccn->dev, "Can't exclude execution levels!\n");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (event->cpu < 0) {
|
|
dev_warn(ccn->dev, "Can't provide per-task data!\n");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
node_xp = CCN_CONFIG_NODE(event->attr.config);
|
|
type = CCN_CONFIG_TYPE(event->attr.config);
|
|
event_id = CCN_CONFIG_EVENT(event->attr.config);
|
|
|
|
/* Validate node/xp vs topology */
|
|
switch (type) {
|
|
case CCN_TYPE_XP:
|
|
if (node_xp >= ccn->num_xps) {
|
|
dev_warn(ccn->dev, "Invalid XP ID %d!\n", node_xp);
|
|
return -EINVAL;
|
|
}
|
|
break;
|
|
case CCN_TYPE_CYCLES:
|
|
break;
|
|
default:
|
|
if (node_xp >= ccn->num_nodes) {
|
|
dev_warn(ccn->dev, "Invalid node ID %d!\n", node_xp);
|
|
return -EINVAL;
|
|
}
|
|
if (!arm_ccn_pmu_type_eq(type, ccn->node[node_xp].type)) {
|
|
dev_warn(ccn->dev, "Invalid type 0x%x for node %d!\n",
|
|
type, node_xp);
|
|
return -EINVAL;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* Validate event ID vs available for the type */
|
|
for (i = 0, valid = 0; i < ARRAY_SIZE(arm_ccn_pmu_events) && !valid;
|
|
i++) {
|
|
struct arm_ccn_pmu_event *e = &arm_ccn_pmu_events[i];
|
|
u32 port = CCN_CONFIG_PORT(event->attr.config);
|
|
u32 vc = CCN_CONFIG_VC(event->attr.config);
|
|
|
|
if (!arm_ccn_pmu_type_eq(type, e->type))
|
|
continue;
|
|
if (event_id != e->event)
|
|
continue;
|
|
if (e->num_ports && port >= e->num_ports) {
|
|
dev_warn(ccn->dev, "Invalid port %d for node/XP %d!\n",
|
|
port, node_xp);
|
|
return -EINVAL;
|
|
}
|
|
if (e->num_vcs && vc >= e->num_vcs) {
|
|
dev_warn(ccn->dev, "Invalid vc %d for node/XP %d!\n",
|
|
vc, node_xp);
|
|
return -EINVAL;
|
|
}
|
|
valid = 1;
|
|
}
|
|
if (!valid) {
|
|
dev_warn(ccn->dev, "Invalid event 0x%x for node/XP %d!\n",
|
|
event_id, node_xp);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Watchpoint-based event for a node is actually set on XP */
|
|
if (event_id == CCN_EVENT_WATCHPOINT && type != CCN_TYPE_XP) {
|
|
u32 port;
|
|
|
|
type = CCN_TYPE_XP;
|
|
port = arm_ccn_node_to_xp_port(node_xp);
|
|
node_xp = arm_ccn_node_to_xp(node_xp);
|
|
|
|
arm_ccn_pmu_config_set(&event->attr.config,
|
|
node_xp, type, port);
|
|
}
|
|
|
|
/* Allocate the cycle counter */
|
|
if (type == CCN_TYPE_CYCLES) {
|
|
if (test_and_set_bit(CCN_IDX_PMU_CYCLE_COUNTER,
|
|
ccn->dt.pmu_counters_mask))
|
|
return -EAGAIN;
|
|
|
|
hw->idx = CCN_IDX_PMU_CYCLE_COUNTER;
|
|
ccn->dt.pmu_counters[CCN_IDX_PMU_CYCLE_COUNTER].event = event;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Allocate an event counter */
|
|
hw->idx = arm_ccn_pmu_alloc_bit(ccn->dt.pmu_counters_mask,
|
|
CCN_NUM_PMU_EVENT_COUNTERS);
|
|
if (hw->idx < 0) {
|
|
dev_warn(ccn->dev, "No more counters available!\n");
|
|
return -EAGAIN;
|
|
}
|
|
|
|
if (type == CCN_TYPE_XP)
|
|
source = &ccn->xp[node_xp];
|
|
else
|
|
source = &ccn->node[node_xp];
|
|
ccn->dt.pmu_counters[hw->idx].source = source;
|
|
|
|
/* Allocate an event source or a watchpoint */
|
|
if (type == CCN_TYPE_XP && event_id == CCN_EVENT_WATCHPOINT)
|
|
bit = arm_ccn_pmu_alloc_bit(source->xp.dt_cmp_mask,
|
|
CCN_NUM_XP_WATCHPOINTS);
|
|
else
|
|
bit = arm_ccn_pmu_alloc_bit(source->pmu_events_mask,
|
|
CCN_NUM_PMU_EVENTS);
|
|
if (bit < 0) {
|
|
dev_warn(ccn->dev, "No more event sources/watchpoints on node/XP %d!\n",
|
|
node_xp);
|
|
clear_bit(hw->idx, ccn->dt.pmu_counters_mask);
|
|
return -EAGAIN;
|
|
}
|
|
hw->config_base = bit;
|
|
|
|
ccn->dt.pmu_counters[hw->idx].event = event;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u64 arm_ccn_pmu_read_counter(struct arm_ccn *ccn, int idx)
|
|
{
|
|
u64 res;
|
|
|
|
if (idx == CCN_IDX_PMU_CYCLE_COUNTER) {
|
|
#ifdef readq
|
|
res = readq(ccn->dt.base + CCN_DT_PMCCNTR);
|
|
#else
|
|
/* 40 bit counter, can do snapshot and read in two parts */
|
|
writel(0x1, ccn->dt.base + CCN_DT_PMSR_REQ);
|
|
while (!(readl(ccn->dt.base + CCN_DT_PMSR) & 0x1))
|
|
;
|
|
writel(0x1, ccn->dt.base + CCN_DT_PMSR_CLR);
|
|
res = readl(ccn->dt.base + CCN_DT_PMCCNTRSR + 4) & 0xff;
|
|
res <<= 32;
|
|
res |= readl(ccn->dt.base + CCN_DT_PMCCNTRSR);
|
|
#endif
|
|
} else {
|
|
res = readl(ccn->dt.base + CCN_DT_PMEVCNT(idx));
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static void arm_ccn_pmu_event_update(struct perf_event *event)
|
|
{
|
|
struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
|
|
struct hw_perf_event *hw = &event->hw;
|
|
u64 prev_count, new_count, mask;
|
|
|
|
do {
|
|
prev_count = local64_read(&hw->prev_count);
|
|
new_count = arm_ccn_pmu_read_counter(ccn, hw->idx);
|
|
} while (local64_xchg(&hw->prev_count, new_count) != prev_count);
|
|
|
|
mask = (1LLU << (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER ? 40 : 32)) - 1;
|
|
|
|
local64_add((new_count - prev_count) & mask, &event->count);
|
|
}
|
|
|
|
static void arm_ccn_pmu_xp_dt_config(struct perf_event *event, int enable)
|
|
{
|
|
struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
|
|
struct hw_perf_event *hw = &event->hw;
|
|
struct arm_ccn_component *xp;
|
|
u32 val, dt_cfg;
|
|
|
|
if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP)
|
|
xp = &ccn->xp[CCN_CONFIG_XP(event->attr.config)];
|
|
else
|
|
xp = &ccn->xp[arm_ccn_node_to_xp(
|
|
CCN_CONFIG_NODE(event->attr.config))];
|
|
|
|
if (enable)
|
|
dt_cfg = hw->event_base;
|
|
else
|
|
dt_cfg = CCN_XP_DT_CONFIG__DT_CFG__PASS_THROUGH;
|
|
|
|
spin_lock(&ccn->dt.config_lock);
|
|
|
|
val = readl(xp->base + CCN_XP_DT_CONFIG);
|
|
val &= ~(CCN_XP_DT_CONFIG__DT_CFG__MASK <<
|
|
CCN_XP_DT_CONFIG__DT_CFG__SHIFT(hw->idx));
|
|
val |= dt_cfg << CCN_XP_DT_CONFIG__DT_CFG__SHIFT(hw->idx);
|
|
writel(val, xp->base + CCN_XP_DT_CONFIG);
|
|
|
|
spin_unlock(&ccn->dt.config_lock);
|
|
}
|
|
|
|
static void arm_ccn_pmu_event_start(struct perf_event *event, int flags)
|
|
{
|
|
struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
|
|
struct hw_perf_event *hw = &event->hw;
|
|
|
|
local64_set(&event->hw.prev_count,
|
|
arm_ccn_pmu_read_counter(ccn, hw->idx));
|
|
hw->state = 0;
|
|
|
|
if (!ccn->irq_used)
|
|
hrtimer_start(&ccn->dt.hrtimer, arm_ccn_pmu_timer_period(),
|
|
HRTIMER_MODE_REL);
|
|
|
|
/* Set the DT bus input, engaging the counter */
|
|
arm_ccn_pmu_xp_dt_config(event, 1);
|
|
}
|
|
|
|
static void arm_ccn_pmu_event_stop(struct perf_event *event, int flags)
|
|
{
|
|
struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
|
|
struct hw_perf_event *hw = &event->hw;
|
|
u64 timeout;
|
|
|
|
/* Disable counting, setting the DT bus to pass-through mode */
|
|
arm_ccn_pmu_xp_dt_config(event, 0);
|
|
|
|
if (!ccn->irq_used)
|
|
hrtimer_cancel(&ccn->dt.hrtimer);
|
|
|
|
/* Let the DT bus drain */
|
|
timeout = arm_ccn_pmu_read_counter(ccn, CCN_IDX_PMU_CYCLE_COUNTER) +
|
|
ccn->num_xps;
|
|
while (arm_ccn_pmu_read_counter(ccn, CCN_IDX_PMU_CYCLE_COUNTER) <
|
|
timeout)
|
|
cpu_relax();
|
|
|
|
if (flags & PERF_EF_UPDATE)
|
|
arm_ccn_pmu_event_update(event);
|
|
|
|
hw->state |= PERF_HES_STOPPED;
|
|
}
|
|
|
|
static void arm_ccn_pmu_xp_watchpoint_config(struct perf_event *event)
|
|
{
|
|
struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
|
|
struct hw_perf_event *hw = &event->hw;
|
|
struct arm_ccn_component *source =
|
|
ccn->dt.pmu_counters[hw->idx].source;
|
|
unsigned long wp = hw->config_base;
|
|
u32 val;
|
|
u64 cmp_l = event->attr.config1;
|
|
u64 cmp_h = event->attr.config2;
|
|
u64 mask_l = ccn->dt.cmp_mask[CCN_CONFIG_MASK(event->attr.config)].l;
|
|
u64 mask_h = ccn->dt.cmp_mask[CCN_CONFIG_MASK(event->attr.config)].h;
|
|
|
|
hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT(wp);
|
|
|
|
/* Direction (RX/TX), device (port) & virtual channel */
|
|
val = readl(source->base + CCN_XP_DT_INTERFACE_SEL);
|
|
val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__MASK <<
|
|
CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(wp));
|
|
val |= CCN_CONFIG_DIR(event->attr.config) <<
|
|
CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(wp);
|
|
val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__MASK <<
|
|
CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(wp));
|
|
val |= CCN_CONFIG_PORT(event->attr.config) <<
|
|
CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(wp);
|
|
val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__MASK <<
|
|
CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(wp));
|
|
val |= CCN_CONFIG_VC(event->attr.config) <<
|
|
CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(wp);
|
|
writel(val, source->base + CCN_XP_DT_INTERFACE_SEL);
|
|
|
|
/* Comparison values */
|
|
writel(cmp_l & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_L(wp));
|
|
writel((cmp_l >> 32) & 0xefffffff,
|
|
source->base + CCN_XP_DT_CMP_VAL_L(wp) + 4);
|
|
writel(cmp_h & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_H(wp));
|
|
writel((cmp_h >> 32) & 0x0fffffff,
|
|
source->base + CCN_XP_DT_CMP_VAL_H(wp) + 4);
|
|
|
|
/* Mask */
|
|
writel(mask_l & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_L(wp));
|
|
writel((mask_l >> 32) & 0xefffffff,
|
|
source->base + CCN_XP_DT_CMP_MASK_L(wp) + 4);
|
|
writel(mask_h & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_H(wp));
|
|
writel((mask_h >> 32) & 0x0fffffff,
|
|
source->base + CCN_XP_DT_CMP_MASK_H(wp) + 4);
|
|
}
|
|
|
|
static void arm_ccn_pmu_xp_event_config(struct perf_event *event)
|
|
{
|
|
struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
|
|
struct hw_perf_event *hw = &event->hw;
|
|
struct arm_ccn_component *source =
|
|
ccn->dt.pmu_counters[hw->idx].source;
|
|
u32 val, id;
|
|
|
|
hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__XP_PMU_EVENT(hw->config_base);
|
|
|
|
id = (CCN_CONFIG_VC(event->attr.config) << 4) |
|
|
(CCN_CONFIG_PORT(event->attr.config) << 3) |
|
|
(CCN_CONFIG_EVENT(event->attr.config) << 0);
|
|
|
|
val = readl(source->base + CCN_XP_PMU_EVENT_SEL);
|
|
val &= ~(CCN_XP_PMU_EVENT_SEL__ID__MASK <<
|
|
CCN_XP_PMU_EVENT_SEL__ID__SHIFT(hw->config_base));
|
|
val |= id << CCN_XP_PMU_EVENT_SEL__ID__SHIFT(hw->config_base);
|
|
writel(val, source->base + CCN_XP_PMU_EVENT_SEL);
|
|
}
|
|
|
|
static void arm_ccn_pmu_node_event_config(struct perf_event *event)
|
|
{
|
|
struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
|
|
struct hw_perf_event *hw = &event->hw;
|
|
struct arm_ccn_component *source =
|
|
ccn->dt.pmu_counters[hw->idx].source;
|
|
u32 type = CCN_CONFIG_TYPE(event->attr.config);
|
|
u32 val, port;
|
|
|
|
port = arm_ccn_node_to_xp_port(CCN_CONFIG_NODE(event->attr.config));
|
|
hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__DEVICE_PMU_EVENT(port,
|
|
hw->config_base);
|
|
|
|
/* These *_event_sel regs should be identical, but let's make sure... */
|
|
BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL != CCN_SBAS_PMU_EVENT_SEL);
|
|
BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL != CCN_RNI_PMU_EVENT_SEL);
|
|
BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(1) !=
|
|
CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(1));
|
|
BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(1) !=
|
|
CCN_RNI_PMU_EVENT_SEL__ID__SHIFT(1));
|
|
BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL__ID__MASK !=
|
|
CCN_SBAS_PMU_EVENT_SEL__ID__MASK);
|
|
BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL__ID__MASK !=
|
|
CCN_RNI_PMU_EVENT_SEL__ID__MASK);
|
|
if (WARN_ON(type != CCN_TYPE_HNF && type != CCN_TYPE_SBAS &&
|
|
!arm_ccn_pmu_type_eq(type, CCN_TYPE_RNI_3P)))
|
|
return;
|
|
|
|
/* Set the event id for the pre-allocated counter */
|
|
val = readl(source->base + CCN_HNF_PMU_EVENT_SEL);
|
|
val &= ~(CCN_HNF_PMU_EVENT_SEL__ID__MASK <<
|
|
CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(hw->config_base));
|
|
val |= CCN_CONFIG_EVENT(event->attr.config) <<
|
|
CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(hw->config_base);
|
|
writel(val, source->base + CCN_HNF_PMU_EVENT_SEL);
|
|
}
|
|
|
|
static void arm_ccn_pmu_event_config(struct perf_event *event)
|
|
{
|
|
struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
|
|
struct hw_perf_event *hw = &event->hw;
|
|
u32 xp, offset, val;
|
|
|
|
/* Cycle counter requires no setup */
|
|
if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER)
|
|
return;
|
|
|
|
if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP)
|
|
xp = CCN_CONFIG_XP(event->attr.config);
|
|
else
|
|
xp = arm_ccn_node_to_xp(CCN_CONFIG_NODE(event->attr.config));
|
|
|
|
spin_lock(&ccn->dt.config_lock);
|
|
|
|
/* Set the DT bus "distance" register */
|
|
offset = (hw->idx / 4) * 4;
|
|
val = readl(ccn->dt.base + CCN_DT_ACTIVE_DSM + offset);
|
|
val &= ~(CCN_DT_ACTIVE_DSM__DSM_ID__MASK <<
|
|
CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(hw->idx % 4));
|
|
val |= xp << CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(hw->idx % 4);
|
|
writel(val, ccn->dt.base + CCN_DT_ACTIVE_DSM + offset);
|
|
|
|
if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP) {
|
|
if (CCN_CONFIG_EVENT(event->attr.config) ==
|
|
CCN_EVENT_WATCHPOINT)
|
|
arm_ccn_pmu_xp_watchpoint_config(event);
|
|
else
|
|
arm_ccn_pmu_xp_event_config(event);
|
|
} else {
|
|
arm_ccn_pmu_node_event_config(event);
|
|
}
|
|
|
|
spin_unlock(&ccn->dt.config_lock);
|
|
}
|
|
|
|
static int arm_ccn_pmu_event_add(struct perf_event *event, int flags)
|
|
{
|
|
struct hw_perf_event *hw = &event->hw;
|
|
|
|
arm_ccn_pmu_event_config(event);
|
|
|
|
hw->state = PERF_HES_STOPPED;
|
|
|
|
if (flags & PERF_EF_START)
|
|
arm_ccn_pmu_event_start(event, PERF_EF_UPDATE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void arm_ccn_pmu_event_del(struct perf_event *event, int flags)
|
|
{
|
|
arm_ccn_pmu_event_stop(event, PERF_EF_UPDATE);
|
|
}
|
|
|
|
static void arm_ccn_pmu_event_read(struct perf_event *event)
|
|
{
|
|
arm_ccn_pmu_event_update(event);
|
|
}
|
|
|
|
static irqreturn_t arm_ccn_pmu_overflow_handler(struct arm_ccn_dt *dt)
|
|
{
|
|
u32 pmovsr = readl(dt->base + CCN_DT_PMOVSR);
|
|
int idx;
|
|
|
|
if (!pmovsr)
|
|
return IRQ_NONE;
|
|
|
|
writel(pmovsr, dt->base + CCN_DT_PMOVSR_CLR);
|
|
|
|
BUILD_BUG_ON(CCN_IDX_PMU_CYCLE_COUNTER != CCN_NUM_PMU_EVENT_COUNTERS);
|
|
|
|
for (idx = 0; idx < CCN_NUM_PMU_EVENT_COUNTERS + 1; idx++) {
|
|
struct perf_event *event = dt->pmu_counters[idx].event;
|
|
int overflowed = pmovsr & BIT(idx);
|
|
|
|
WARN_ON_ONCE(overflowed && !event &&
|
|
idx != CCN_IDX_PMU_CYCLE_COUNTER);
|
|
|
|
if (!event || !overflowed)
|
|
continue;
|
|
|
|
arm_ccn_pmu_event_update(event);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static enum hrtimer_restart arm_ccn_pmu_timer_handler(struct hrtimer *hrtimer)
|
|
{
|
|
struct arm_ccn_dt *dt = container_of(hrtimer, struct arm_ccn_dt,
|
|
hrtimer);
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
arm_ccn_pmu_overflow_handler(dt);
|
|
local_irq_restore(flags);
|
|
|
|
hrtimer_forward_now(hrtimer, arm_ccn_pmu_timer_period());
|
|
return HRTIMER_RESTART;
|
|
}
|
|
|
|
|
|
static DEFINE_IDA(arm_ccn_pmu_ida);
|
|
|
|
static int arm_ccn_pmu_init(struct arm_ccn *ccn)
|
|
{
|
|
int i;
|
|
char *name;
|
|
|
|
/* Initialize DT subsystem */
|
|
ccn->dt.base = ccn->base + CCN_REGION_SIZE;
|
|
spin_lock_init(&ccn->dt.config_lock);
|
|
writel(CCN_DT_PMOVSR_CLR__MASK, ccn->dt.base + CCN_DT_PMOVSR_CLR);
|
|
writel(CCN_DT_CTL__DT_EN, ccn->dt.base + CCN_DT_CTL);
|
|
writel(CCN_DT_PMCR__OVFL_INTR_EN | CCN_DT_PMCR__PMU_EN,
|
|
ccn->dt.base + CCN_DT_PMCR);
|
|
writel(0x1, ccn->dt.base + CCN_DT_PMSR_CLR);
|
|
for (i = 0; i < ccn->num_xps; i++) {
|
|
writel(0, ccn->xp[i].base + CCN_XP_DT_CONFIG);
|
|
writel((CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS <<
|
|
CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(0)) |
|
|
(CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS <<
|
|
CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(1)) |
|
|
CCN_XP_DT_CONTROL__DT_ENABLE,
|
|
ccn->xp[i].base + CCN_XP_DT_CONTROL);
|
|
}
|
|
ccn->dt.cmp_mask[CCN_IDX_MASK_ANY].l = ~0;
|
|
ccn->dt.cmp_mask[CCN_IDX_MASK_ANY].h = ~0;
|
|
ccn->dt.cmp_mask[CCN_IDX_MASK_EXACT].l = 0;
|
|
ccn->dt.cmp_mask[CCN_IDX_MASK_EXACT].h = 0;
|
|
ccn->dt.cmp_mask[CCN_IDX_MASK_ORDER].l = ~0;
|
|
ccn->dt.cmp_mask[CCN_IDX_MASK_ORDER].h = ~(0x1 << 15);
|
|
ccn->dt.cmp_mask[CCN_IDX_MASK_OPCODE].l = ~0;
|
|
ccn->dt.cmp_mask[CCN_IDX_MASK_OPCODE].h = ~(0x1f << 9);
|
|
|
|
/* Get a convenient /sys/event_source/devices/ name */
|
|
ccn->dt.id = ida_simple_get(&arm_ccn_pmu_ida, 0, 0, GFP_KERNEL);
|
|
if (ccn->dt.id == 0) {
|
|
name = "ccn";
|
|
} else {
|
|
int len = snprintf(NULL, 0, "ccn_%d", ccn->dt.id);
|
|
|
|
name = devm_kzalloc(ccn->dev, len + 1, GFP_KERNEL);
|
|
snprintf(name, len + 1, "ccn_%d", ccn->dt.id);
|
|
}
|
|
|
|
/* Perf driver registration */
|
|
ccn->dt.pmu = (struct pmu) {
|
|
.attr_groups = arm_ccn_pmu_attr_groups,
|
|
.task_ctx_nr = perf_invalid_context,
|
|
.event_init = arm_ccn_pmu_event_init,
|
|
.add = arm_ccn_pmu_event_add,
|
|
.del = arm_ccn_pmu_event_del,
|
|
.start = arm_ccn_pmu_event_start,
|
|
.stop = arm_ccn_pmu_event_stop,
|
|
.read = arm_ccn_pmu_event_read,
|
|
};
|
|
|
|
/* No overflow interrupt? Have to use a timer instead. */
|
|
if (!ccn->irq_used) {
|
|
dev_info(ccn->dev, "No access to interrupts, using timer.\n");
|
|
hrtimer_init(&ccn->dt.hrtimer, CLOCK_MONOTONIC,
|
|
HRTIMER_MODE_REL);
|
|
ccn->dt.hrtimer.function = arm_ccn_pmu_timer_handler;
|
|
}
|
|
|
|
return perf_pmu_register(&ccn->dt.pmu, name, -1);
|
|
}
|
|
|
|
static void arm_ccn_pmu_cleanup(struct arm_ccn *ccn)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ccn->num_xps; i++)
|
|
writel(0, ccn->xp[i].base + CCN_XP_DT_CONTROL);
|
|
writel(0, ccn->dt.base + CCN_DT_PMCR);
|
|
perf_pmu_unregister(&ccn->dt.pmu);
|
|
ida_simple_remove(&arm_ccn_pmu_ida, ccn->dt.id);
|
|
}
|
|
|
|
|
|
static int arm_ccn_for_each_valid_region(struct arm_ccn *ccn,
|
|
int (*callback)(struct arm_ccn *ccn, int region,
|
|
void __iomem *base, u32 type, u32 id))
|
|
{
|
|
int region;
|
|
|
|
for (region = 0; region < CCN_NUM_REGIONS; region++) {
|
|
u32 val, type, id;
|
|
void __iomem *base;
|
|
int err;
|
|
|
|
val = readl(ccn->base + CCN_MN_OLY_COMP_LIST_63_0 +
|
|
4 * (region / 32));
|
|
if (!(val & (1 << (region % 32))))
|
|
continue;
|
|
|
|
base = ccn->base + region * CCN_REGION_SIZE;
|
|
val = readl(base + CCN_ALL_OLY_ID);
|
|
type = (val >> CCN_ALL_OLY_ID__OLY_ID__SHIFT) &
|
|
CCN_ALL_OLY_ID__OLY_ID__MASK;
|
|
id = (val >> CCN_ALL_OLY_ID__NODE_ID__SHIFT) &
|
|
CCN_ALL_OLY_ID__NODE_ID__MASK;
|
|
|
|
err = callback(ccn, region, base, type, id);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int arm_ccn_get_nodes_num(struct arm_ccn *ccn, int region,
|
|
void __iomem *base, u32 type, u32 id)
|
|
{
|
|
|
|
if (type == CCN_TYPE_XP && id >= ccn->num_xps)
|
|
ccn->num_xps = id + 1;
|
|
else if (id >= ccn->num_nodes)
|
|
ccn->num_nodes = id + 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int arm_ccn_init_nodes(struct arm_ccn *ccn, int region,
|
|
void __iomem *base, u32 type, u32 id)
|
|
{
|
|
struct arm_ccn_component *component;
|
|
|
|
dev_dbg(ccn->dev, "Region %d: id=%u, type=0x%02x\n", region, id, type);
|
|
|
|
switch (type) {
|
|
case CCN_TYPE_MN:
|
|
case CCN_TYPE_DT:
|
|
return 0;
|
|
case CCN_TYPE_XP:
|
|
component = &ccn->xp[id];
|
|
break;
|
|
case CCN_TYPE_SBSX:
|
|
ccn->sbsx_present = 1;
|
|
component = &ccn->node[id];
|
|
break;
|
|
case CCN_TYPE_SBAS:
|
|
ccn->sbas_present = 1;
|
|
/* Fall-through */
|
|
default:
|
|
component = &ccn->node[id];
|
|
break;
|
|
}
|
|
|
|
component->base = base;
|
|
component->type = type;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static irqreturn_t arm_ccn_error_handler(struct arm_ccn *ccn,
|
|
const u32 *err_sig_val)
|
|
{
|
|
/* This should be really handled by firmware... */
|
|
dev_err(ccn->dev, "Error reported in %08x%08x%08x%08x%08x%08x.\n",
|
|
err_sig_val[5], err_sig_val[4], err_sig_val[3],
|
|
err_sig_val[2], err_sig_val[1], err_sig_val[0]);
|
|
dev_err(ccn->dev, "Disabling interrupt generation for all errors.\n");
|
|
writel(CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLE,
|
|
ccn->base + CCN_MN_ERRINT_STATUS);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
|
|
static irqreturn_t arm_ccn_irq_handler(int irq, void *dev_id)
|
|
{
|
|
irqreturn_t res = IRQ_NONE;
|
|
struct arm_ccn *ccn = dev_id;
|
|
u32 err_sig_val[6];
|
|
u32 err_or;
|
|
int i;
|
|
|
|
/* PMU overflow is a special case */
|
|
err_or = err_sig_val[0] = readl(ccn->base + CCN_MN_ERR_SIG_VAL_63_0);
|
|
if (err_or & CCN_MN_ERR_SIG_VAL_63_0__DT) {
|
|
err_or &= ~CCN_MN_ERR_SIG_VAL_63_0__DT;
|
|
res = arm_ccn_pmu_overflow_handler(&ccn->dt);
|
|
}
|
|
|
|
/* Have to read all err_sig_vals to clear them */
|
|
for (i = 1; i < ARRAY_SIZE(err_sig_val); i++) {
|
|
err_sig_val[i] = readl(ccn->base +
|
|
CCN_MN_ERR_SIG_VAL_63_0 + i * 4);
|
|
err_or |= err_sig_val[i];
|
|
}
|
|
if (err_or)
|
|
res |= arm_ccn_error_handler(ccn, err_sig_val);
|
|
|
|
if (res != IRQ_NONE)
|
|
writel(CCN_MN_ERRINT_STATUS__INTREQ__DESSERT,
|
|
ccn->base + CCN_MN_ERRINT_STATUS);
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
static int arm_ccn_probe(struct platform_device *pdev)
|
|
{
|
|
struct arm_ccn *ccn;
|
|
struct resource *res;
|
|
int err;
|
|
|
|
ccn = devm_kzalloc(&pdev->dev, sizeof(*ccn), GFP_KERNEL);
|
|
if (!ccn)
|
|
return -ENOMEM;
|
|
ccn->dev = &pdev->dev;
|
|
platform_set_drvdata(pdev, ccn);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res)
|
|
return -EINVAL;
|
|
|
|
if (!devm_request_mem_region(ccn->dev, res->start,
|
|
resource_size(res), pdev->name))
|
|
return -EBUSY;
|
|
|
|
ccn->base = devm_ioremap(ccn->dev, res->start,
|
|
resource_size(res));
|
|
if (!ccn->base)
|
|
return -EFAULT;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
|
if (!res)
|
|
return -EINVAL;
|
|
|
|
/* Check if we can use the interrupt */
|
|
writel(CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLE,
|
|
ccn->base + CCN_MN_ERRINT_STATUS);
|
|
if (readl(ccn->base + CCN_MN_ERRINT_STATUS) &
|
|
CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLED) {
|
|
/* Can set 'disable' bits, so can acknowledge interrupts */
|
|
writel(CCN_MN_ERRINT_STATUS__PMU_EVENTS__ENABLE,
|
|
ccn->base + CCN_MN_ERRINT_STATUS);
|
|
err = devm_request_irq(ccn->dev, res->start,
|
|
arm_ccn_irq_handler, 0, dev_name(ccn->dev),
|
|
ccn);
|
|
if (err)
|
|
return err;
|
|
|
|
ccn->irq_used = 1;
|
|
}
|
|
|
|
|
|
/* Build topology */
|
|
|
|
err = arm_ccn_for_each_valid_region(ccn, arm_ccn_get_nodes_num);
|
|
if (err)
|
|
return err;
|
|
|
|
ccn->node = devm_kzalloc(ccn->dev, sizeof(*ccn->node) * ccn->num_nodes,
|
|
GFP_KERNEL);
|
|
ccn->xp = devm_kzalloc(ccn->dev, sizeof(*ccn->node) * ccn->num_xps,
|
|
GFP_KERNEL);
|
|
if (!ccn->node || !ccn->xp)
|
|
return -ENOMEM;
|
|
|
|
err = arm_ccn_for_each_valid_region(ccn, arm_ccn_init_nodes);
|
|
if (err)
|
|
return err;
|
|
|
|
return arm_ccn_pmu_init(ccn);
|
|
}
|
|
|
|
static int arm_ccn_remove(struct platform_device *pdev)
|
|
{
|
|
struct arm_ccn *ccn = platform_get_drvdata(pdev);
|
|
|
|
arm_ccn_pmu_cleanup(ccn);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id arm_ccn_match[] = {
|
|
{ .compatible = "arm,ccn-504", },
|
|
{},
|
|
};
|
|
|
|
static struct platform_driver arm_ccn_driver = {
|
|
.driver = {
|
|
.name = "arm-ccn",
|
|
.of_match_table = arm_ccn_match,
|
|
},
|
|
.probe = arm_ccn_probe,
|
|
.remove = arm_ccn_remove,
|
|
};
|
|
|
|
static int __init arm_ccn_init(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(arm_ccn_pmu_events); i++)
|
|
arm_ccn_pmu_events_attrs[i] = &arm_ccn_pmu_events[i].attr.attr;
|
|
|
|
return platform_driver_register(&arm_ccn_driver);
|
|
}
|
|
|
|
static void __exit arm_ccn_exit(void)
|
|
{
|
|
platform_driver_unregister(&arm_ccn_driver);
|
|
}
|
|
|
|
module_init(arm_ccn_init);
|
|
module_exit(arm_ccn_exit);
|
|
|
|
MODULE_AUTHOR("Pawel Moll <pawel.moll@arm.com>");
|
|
MODULE_LICENSE("GPL");
|