| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Pawel Moll | 7646 | 94.83% | 16 | 42.11% |
| Mark Rutland | 231 | 2.86% | 4 | 10.53% |
| Sebastian Andrzej Siewior | 74 | 0.92% | 2 | 5.26% |
| Christophe Jaillet | 24 | 0.30% | 2 | 5.26% |
| Thomas Gleixner | 15 | 0.19% | 2 | 5.26% |
| Suzuki K. Poulose | 15 | 0.19% | 2 | 5.26% |
| Sudeep Holla | 10 | 0.12% | 1 | 2.63% |
| SF Markus Elfring | 10 | 0.12% | 1 | 2.63% |
| Velibor Markovski | 7 | 0.09% | 1 | 2.63% |
| Marc Zyngier | 7 | 0.09% | 1 | 2.63% |
| Javier Martinez Canillas | 7 | 0.09% | 1 | 2.63% |
| Kim Phillips | 5 | 0.06% | 1 | 2.63% |
| Peter Zijlstra | 4 | 0.05% | 1 | 2.63% |
| Arvind Yadav | 4 | 0.05% | 1 | 2.63% |
| Randy Dunlap | 3 | 0.04% | 1 | 2.63% |
| Robin Murphy | 1 | 0.01% | 1 | 2.63% |
| Total | 8063 | 38 |
/* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * Copyright (C) 2014 ARM Limited */ #include <linux/ctype.h> #include <linux/hrtimer.h> #include <linux/idr.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/perf_event.h> #include <linux/platform_device.h> #include <linux/slab.h> #define CCN_NUM_XP_PORTS 2 #define CCN_NUM_VCS 4 #define CCN_NUM_REGIONS 256 #define CCN_REGION_SIZE 0x10000 #define CCN_ALL_OLY_ID 0xff00 #define CCN_ALL_OLY_ID__OLY_ID__SHIFT 0 #define CCN_ALL_OLY_ID__OLY_ID__MASK 0x1f #define CCN_ALL_OLY_ID__NODE_ID__SHIFT 8 #define CCN_ALL_OLY_ID__NODE_ID__MASK 0x3f #define CCN_MN_ERRINT_STATUS 0x0008 #define CCN_MN_ERRINT_STATUS__INTREQ__DESSERT 0x11 #define CCN_MN_ERRINT_STATUS__ALL_ERRORS__ENABLE 0x02 #define CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLED 0x20 #define CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLE 0x22 #define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_ENABLE 0x04 #define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_DISABLED 0x40 #define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_DISABLE 0x44 #define CCN_MN_ERRINT_STATUS__PMU_EVENTS__ENABLE 0x08 #define CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLED 0x80 #define CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLE 0x88 #define CCN_MN_OLY_COMP_LIST_63_0 0x01e0 #define CCN_MN_ERR_SIG_VAL_63_0 0x0300 #define CCN_MN_ERR_SIG_VAL_63_0__DT (1 << 1) #define CCN_DT_ACTIVE_DSM 0x0000 #define CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(n) ((n) * 8) #define CCN_DT_ACTIVE_DSM__DSM_ID__MASK 0xff #define CCN_DT_CTL 0x0028 #define CCN_DT_CTL__DT_EN (1 << 0) #define CCN_DT_PMEVCNT(n) (0x0100 + (n) * 0x8) #define CCN_DT_PMCCNTR 0x0140 #define CCN_DT_PMCCNTRSR 0x0190 #define CCN_DT_PMOVSR 0x0198 #define CCN_DT_PMOVSR_CLR 0x01a0 #define CCN_DT_PMOVSR_CLR__MASK 0x1f #define CCN_DT_PMCR 0x01a8 #define CCN_DT_PMCR__OVFL_INTR_EN (1 << 6) #define CCN_DT_PMCR__PMU_EN (1 << 0) #define CCN_DT_PMSR 0x01b0 #define CCN_DT_PMSR_REQ 0x01b8 #define CCN_DT_PMSR_CLR 0x01c0 #define CCN_HNF_PMU_EVENT_SEL 0x0600 #define CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4) #define CCN_HNF_PMU_EVENT_SEL__ID__MASK 0xf #define CCN_XP_DT_CONFIG 0x0300 #define CCN_XP_DT_CONFIG__DT_CFG__SHIFT(n) ((n) * 4) #define CCN_XP_DT_CONFIG__DT_CFG__MASK 0xf #define CCN_XP_DT_CONFIG__DT_CFG__PASS_THROUGH 0x0 #define CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT_0_OR_1 0x1 #define CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT(n) (0x2 + (n)) #define CCN_XP_DT_CONFIG__DT_CFG__XP_PMU_EVENT(n) (0x4 + (n)) #define CCN_XP_DT_CONFIG__DT_CFG__DEVICE_PMU_EVENT(d, n) (0x8 + (d) * 4 + (n)) #define CCN_XP_DT_INTERFACE_SEL 0x0308 #define CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(n) (0 + (n) * 8) #define CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__MASK 0x1 #define CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(n) (1 + (n) * 8) #define CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__MASK 0x1 #define CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(n) (2 + (n) * 8) #define CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__MASK 0x3 #define CCN_XP_DT_CMP_VAL_L(n) (0x0310 + (n) * 0x40) #define CCN_XP_DT_CMP_VAL_H(n) (0x0318 + (n) * 0x40) #define CCN_XP_DT_CMP_MASK_L(n) (0x0320 + (n) * 0x40) #define CCN_XP_DT_CMP_MASK_H(n) (0x0328 + (n) * 0x40) #define CCN_XP_DT_CONTROL 0x0370 #define CCN_XP_DT_CONTROL__DT_ENABLE (1 << 0) #define CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(n) (12 + (n) * 4) #define CCN_XP_DT_CONTROL__WP_ARM_SEL__MASK 0xf #define CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS 0xf #define CCN_XP_PMU_EVENT_SEL 0x0600 #define CCN_XP_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 7) #define CCN_XP_PMU_EVENT_SEL__ID__MASK 0x3f #define CCN_SBAS_PMU_EVENT_SEL 0x0600 #define CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4) #define CCN_SBAS_PMU_EVENT_SEL__ID__MASK 0xf #define CCN_RNI_PMU_EVENT_SEL 0x0600 #define CCN_RNI_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4) #define CCN_RNI_PMU_EVENT_SEL__ID__MASK 0xf #define CCN_TYPE_MN 0x01 #define CCN_TYPE_DT 0x02 #define CCN_TYPE_HNF 0x04 #define CCN_TYPE_HNI 0x05 #define CCN_TYPE_XP 0x08 #define CCN_TYPE_SBSX 0x0c #define CCN_TYPE_SBAS 0x10 #define CCN_TYPE_RNI_1P 0x14 #define CCN_TYPE_RNI_2P 0x15 #define CCN_TYPE_RNI_3P 0x16 #define CCN_TYPE_RND_1P 0x18 /* RN-D = RN-I + DVM */ #define CCN_TYPE_RND_2P 0x19 #define CCN_TYPE_RND_3P 0x1a #define CCN_TYPE_CYCLES 0xff /* Pseudotype */ #define CCN_EVENT_WATCHPOINT 0xfe /* Pseudoevent */ #define CCN_NUM_PMU_EVENTS 4 #define CCN_NUM_XP_WATCHPOINTS 2 /* See DT.dbg_id.num_watchpoints */ #define CCN_NUM_PMU_EVENT_COUNTERS 8 /* See DT.dbg_id.num_pmucntr */ #define CCN_IDX_PMU_CYCLE_COUNTER CCN_NUM_PMU_EVENT_COUNTERS #define CCN_NUM_PREDEFINED_MASKS 4 #define CCN_IDX_MASK_ANY (CCN_NUM_PMU_EVENT_COUNTERS + 0) #define CCN_IDX_MASK_EXACT (CCN_NUM_PMU_EVENT_COUNTERS + 1) #define CCN_IDX_MASK_ORDER (CCN_NUM_PMU_EVENT_COUNTERS + 2) #define CCN_IDX_MASK_OPCODE (CCN_NUM_PMU_EVENT_COUNTERS + 3) struct arm_ccn_component { void __iomem *base; u32 type; DECLARE_BITMAP(pmu_events_mask, CCN_NUM_PMU_EVENTS); union { struct { DECLARE_BITMAP(dt_cmp_mask, CCN_NUM_XP_WATCHPOINTS); } xp; }; }; #define pmu_to_arm_ccn(_pmu) container_of(container_of(_pmu, \ struct arm_ccn_dt, pmu), struct arm_ccn, dt) struct arm_ccn_dt { int id; void __iomem *base; spinlock_t config_lock; DECLARE_BITMAP(pmu_counters_mask, CCN_NUM_PMU_EVENT_COUNTERS + 1); struct { struct arm_ccn_component *source; struct perf_event *event; } pmu_counters[CCN_NUM_PMU_EVENT_COUNTERS + 1]; struct { u64 l, h; } cmp_mask[CCN_NUM_PMU_EVENT_COUNTERS + CCN_NUM_PREDEFINED_MASKS]; struct hrtimer hrtimer; cpumask_t cpu; struct hlist_node node; struct pmu pmu; }; struct arm_ccn { struct device *dev; void __iomem *base; unsigned int irq; unsigned sbas_present:1; unsigned sbsx_present:1; int num_nodes; struct arm_ccn_component *node; int num_xps; struct arm_ccn_component *xp; struct arm_ccn_dt dt; int mn_id; }; static int arm_ccn_node_to_xp(int node) { return node / CCN_NUM_XP_PORTS; } static int arm_ccn_node_to_xp_port(int node) { return node % CCN_NUM_XP_PORTS; } /* * Bit shifts and masks in these defines must be kept in sync with * arm_ccn_pmu_config_set() and CCN_FORMAT_ATTRs below! */ #define CCN_CONFIG_NODE(_config) (((_config) >> 0) & 0xff) #define CCN_CONFIG_XP(_config) (((_config) >> 0) & 0xff) #define CCN_CONFIG_TYPE(_config) (((_config) >> 8) & 0xff) #define CCN_CONFIG_EVENT(_config) (((_config) >> 16) & 0xff) #define CCN_CONFIG_PORT(_config) (((_config) >> 24) & 0x3) #define CCN_CONFIG_BUS(_config) (((_config) >> 24) & 0x3) #define CCN_CONFIG_VC(_config) (((_config) >> 26) & 0x7) #define CCN_CONFIG_DIR(_config) (((_config) >> 29) & 0x1) #define CCN_CONFIG_MASK(_config) (((_config) >> 30) & 0xf) static void arm_ccn_pmu_config_set(u64 *config, u32 node_xp, u32 type, u32 port) { *config &= ~((0xff << 0) | (0xff << 8) | (0x3 << 24)); *config |= (node_xp << 0) | (type << 8) | (port << 24); } static ssize_t arm_ccn_pmu_format_show(struct device *dev, struct device_attribute *attr, char *buf) { struct dev_ext_attribute *ea = container_of(attr, struct dev_ext_attribute, attr); return snprintf(buf, PAGE_SIZE, "%s\n", (char *)ea->var); } #define CCN_FORMAT_ATTR(_name, _config) \ struct dev_ext_attribute arm_ccn_pmu_format_attr_##_name = \ { __ATTR(_name, S_IRUGO, arm_ccn_pmu_format_show, \ NULL), _config } static CCN_FORMAT_ATTR(node, "config:0-7"); static CCN_FORMAT_ATTR(xp, "config:0-7"); static CCN_FORMAT_ATTR(type, "config:8-15"); static CCN_FORMAT_ATTR(event, "config:16-23"); static CCN_FORMAT_ATTR(port, "config:24-25"); static CCN_FORMAT_ATTR(bus, "config:24-25"); static CCN_FORMAT_ATTR(vc, "config:26-28"); static CCN_FORMAT_ATTR(dir, "config:29-29"); static CCN_FORMAT_ATTR(mask, "config:30-33"); static CCN_FORMAT_ATTR(cmp_l, "config1:0-62"); static CCN_FORMAT_ATTR(cmp_h, "config2:0-59"); static struct attribute *arm_ccn_pmu_format_attrs[] = { &arm_ccn_pmu_format_attr_node.attr.attr, &arm_ccn_pmu_format_attr_xp.attr.attr, &arm_ccn_pmu_format_attr_type.attr.attr, &arm_ccn_pmu_format_attr_event.attr.attr, &arm_ccn_pmu_format_attr_port.attr.attr, &arm_ccn_pmu_format_attr_bus.attr.attr, &arm_ccn_pmu_format_attr_vc.attr.attr, &arm_ccn_pmu_format_attr_dir.attr.attr, &arm_ccn_pmu_format_attr_mask.attr.attr, &arm_ccn_pmu_format_attr_cmp_l.attr.attr, &arm_ccn_pmu_format_attr_cmp_h.attr.attr, NULL }; static const struct attribute_group arm_ccn_pmu_format_attr_group = { .name = "format", .attrs = arm_ccn_pmu_format_attrs, }; struct arm_ccn_pmu_event { struct device_attribute attr; u32 type; u32 event; int num_ports; int num_vcs; const char *def; int mask; }; #define CCN_EVENT_ATTR(_name) \ __ATTR(_name, S_IRUGO, arm_ccn_pmu_event_show, NULL) /* * Events defined in TRM for MN, HN-I and SBSX are actually watchpoints set on * their ports in XP they are connected to. For the sake of usability they are * explicitly defined here (and translated into a relevant watchpoint in * arm_ccn_pmu_event_init()) so the user can easily request them without deep * knowledge of the flit format. */ #define CCN_EVENT_MN(_name, _def, _mask) { .attr = CCN_EVENT_ATTR(mn_##_name), \ .type = CCN_TYPE_MN, .event = CCN_EVENT_WATCHPOINT, \ .num_ports = CCN_NUM_XP_PORTS, .num_vcs = CCN_NUM_VCS, \ .def = _def, .mask = _mask, } #define CCN_EVENT_HNI(_name, _def, _mask) { \ .attr = CCN_EVENT_ATTR(hni_##_name), .type = CCN_TYPE_HNI, \ .event = CCN_EVENT_WATCHPOINT, .num_ports = CCN_NUM_XP_PORTS, \ .num_vcs = CCN_NUM_VCS, .def = _def, .mask = _mask, } #define CCN_EVENT_SBSX(_name, _def, _mask) { \ .attr = CCN_EVENT_ATTR(sbsx_##_name), .type = CCN_TYPE_SBSX, \ .event = CCN_EVENT_WATCHPOINT, .num_ports = CCN_NUM_XP_PORTS, \ .num_vcs = CCN_NUM_VCS, .def = _def, .mask = _mask, } #define CCN_EVENT_HNF(_name, _event) { .attr = CCN_EVENT_ATTR(hnf_##_name), \ .type = CCN_TYPE_HNF, .event = _event, } #define CCN_EVENT_XP(_name, _event) { .attr = CCN_EVENT_ATTR(xp_##_name), \ .type = CCN_TYPE_XP, .event = _event, \ .num_ports = CCN_NUM_XP_PORTS, .num_vcs = CCN_NUM_VCS, } /* * RN-I & RN-D (RN-D = RN-I + DVM) nodes have different type ID depending * on configuration. One of them is picked to represent the whole group, * as they all share the same event types. */ #define CCN_EVENT_RNI(_name, _event) { .attr = CCN_EVENT_ATTR(rni_##_name), \ .type = CCN_TYPE_RNI_3P, .event = _event, } #define CCN_EVENT_SBAS(_name, _event) { .attr = CCN_EVENT_ATTR(sbas_##_name), \ .type = CCN_TYPE_SBAS, .event = _event, } #define CCN_EVENT_CYCLES(_name) { .attr = CCN_EVENT_ATTR(_name), \ .type = CCN_TYPE_CYCLES } static ssize_t arm_ccn_pmu_event_show(struct device *dev, struct device_attribute *attr, char *buf) { struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev)); struct arm_ccn_pmu_event *event = container_of(attr, struct arm_ccn_pmu_event, attr); ssize_t res; res = snprintf(buf, PAGE_SIZE, "type=0x%x", event->type); if (event->event) res += snprintf(buf + res, PAGE_SIZE - res, ",event=0x%x", event->event); if (event->def) res += snprintf(buf + res, PAGE_SIZE - res, ",%s", event->def); if (event->mask) res += snprintf(buf + res, PAGE_SIZE - res, ",mask=0x%x", event->mask); /* Arguments required by an event */ switch (event->type) { case CCN_TYPE_CYCLES: break; case CCN_TYPE_XP: res += snprintf(buf + res, PAGE_SIZE - res, ",xp=?,vc=?"); if (event->event == CCN_EVENT_WATCHPOINT) res += snprintf(buf + res, PAGE_SIZE - res, ",port=?,dir=?,cmp_l=?,cmp_h=?,mask=?"); else res += snprintf(buf + res, PAGE_SIZE - res, ",bus=?"); break; case CCN_TYPE_MN: res += snprintf(buf + res, PAGE_SIZE - res, ",node=%d", ccn->mn_id); break; default: res += snprintf(buf + res, PAGE_SIZE - res, ",node=?"); break; } res += snprintf(buf + res, PAGE_SIZE - res, "\n"); return res; } static umode_t arm_ccn_pmu_events_is_visible(struct kobject *kobj, struct attribute *attr, int index) { struct device *dev = kobj_to_dev(kobj); struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev)); struct device_attribute *dev_attr = container_of(attr, struct device_attribute, attr); struct arm_ccn_pmu_event *event = container_of(dev_attr, struct arm_ccn_pmu_event, attr); if (event->type == CCN_TYPE_SBAS && !ccn->sbas_present) return 0; if (event->type == CCN_TYPE_SBSX && !ccn->sbsx_present) return 0; return attr->mode; } static struct arm_ccn_pmu_event arm_ccn_pmu_events[] = { CCN_EVENT_MN(eobarrier, "dir=1,vc=0,cmp_h=0x1c00", CCN_IDX_MASK_OPCODE), CCN_EVENT_MN(ecbarrier, "dir=1,vc=0,cmp_h=0x1e00", CCN_IDX_MASK_OPCODE), CCN_EVENT_MN(dvmop, "dir=1,vc=0,cmp_h=0x2800", CCN_IDX_MASK_OPCODE), CCN_EVENT_HNI(txdatflits, "dir=1,vc=3", CCN_IDX_MASK_ANY), CCN_EVENT_HNI(rxdatflits, "dir=0,vc=3", CCN_IDX_MASK_ANY), CCN_EVENT_HNI(txreqflits, "dir=1,vc=0", CCN_IDX_MASK_ANY), CCN_EVENT_HNI(rxreqflits, "dir=0,vc=0", CCN_IDX_MASK_ANY), CCN_EVENT_HNI(rxreqflits_order, "dir=0,vc=0,cmp_h=0x8000", CCN_IDX_MASK_ORDER), CCN_EVENT_SBSX(txdatflits, "dir=1,vc=3", CCN_IDX_MASK_ANY), CCN_EVENT_SBSX(rxdatflits, "dir=0,vc=3", CCN_IDX_MASK_ANY), CCN_EVENT_SBSX(txreqflits, "dir=1,vc=0", CCN_IDX_MASK_ANY), 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 const 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 const struct attribute_group arm_ccn_pmu_cmp_mask_attr_group = { .name = "cmp_mask", .attrs = arm_ccn_pmu_cmp_mask_attrs, }; static ssize_t arm_ccn_pmu_cpumask_show(struct device *dev, struct device_attribute *attr, char *buf) { struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev)); return cpumap_print_to_pagebuf(true, buf, &ccn->dt.cpu); } static struct device_attribute arm_ccn_pmu_cpumask_attr = __ATTR(cpumask, S_IRUGO, arm_ccn_pmu_cpumask_show, NULL); static struct attribute *arm_ccn_pmu_cpumask_attrs[] = { &arm_ccn_pmu_cpumask_attr.attr, NULL, }; static const struct attribute_group arm_ccn_pmu_cpumask_attr_group = { .attrs = arm_ccn_pmu_cpumask_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, &arm_ccn_pmu_cpumask_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 int arm_ccn_pmu_event_alloc(struct perf_event *event) { struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); struct hw_perf_event *hw = &event->hw; u32 node_xp, type, event_id; struct arm_ccn_component *source; int bit; node_xp = CCN_CONFIG_NODE(event->attr.config); type = CCN_CONFIG_TYPE(event->attr.config); event_id = CCN_CONFIG_EVENT(event->attr.config); /* 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_dbg(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_dbg(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 void arm_ccn_pmu_event_release(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; int i; struct perf_event *sibling; if (event->attr.type != event->pmu->type) return -ENOENT; ccn = pmu_to_arm_ccn(event->pmu); if (hw->sample_period) { dev_dbg(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 || event->attr.exclude_host || event->attr.exclude_guest) { dev_dbg(ccn->dev, "Can't exclude execution levels!\n"); return -EINVAL; } if (event->cpu < 0) { dev_dbg(ccn->dev, "Can't provide per-task data!\n"); return -EOPNOTSUPP; } /* * Many perf core operations (eg. events rotation) operate on a * single CPU context. This is obvious for CPU PMUs, where one * expects the same sets of events being observed on all CPUs, * but can lead to issues for off-core PMUs, like CCN, where each * event could be theoretically assigned to a different CPU. To * mitigate this, we enforce CPU assignment to one, selected * processor (the one described in the "cpumask" attribute). */ event->cpu = cpumask_first(&ccn->dt.cpu); 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_MN: if (node_xp != ccn->mn_id) { dev_dbg(ccn->dev, "Invalid MN ID %d!\n", node_xp); return -EINVAL; } break; case CCN_TYPE_XP: if (node_xp >= ccn->num_xps) { dev_dbg(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_dbg(ccn->dev, "Invalid node ID %d!\n", node_xp); return -EINVAL; } if (!arm_ccn_pmu_type_eq(type, ccn->node[node_xp].type)) { dev_dbg(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_dbg(ccn->dev, "Invalid port %d for node/XP %d!\n", port, node_xp); return -EINVAL; } if (e->num_vcs && vc >= e->num_vcs) { dev_dbg(ccn->dev, "Invalid vc %d for node/XP %d!\n", vc, node_xp); return -EINVAL; } valid = 1; } if (!valid) { dev_dbg(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); } /* * We must NOT create groups containing mixed PMUs, although software * events are acceptable (for example to create a CCN group * periodically read when a hrtimer aka cpu-clock leader triggers). */ if (event->group_leader->pmu != event->pmu && !is_software_event(event->group_leader)) return -EINVAL; for_each_sibling_event(sibling, event->group_leader) { if (sibling->pmu != event->pmu && !is_software_event(sibling)) return -EINVAL; } 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; /* Nothing to do for cycle counter */ if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER) return; 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; /* 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 hw_perf_event *hw = &event->hw; /* Disable counting, setting the DT bus to pass-through mode */ arm_ccn_pmu_xp_dt_config(event, 0); 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) & 0x7fffffff, 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) & 0x7fffffff, 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_BUS(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_active_counters(struct arm_ccn *ccn) { return bitmap_weight(ccn->dt.pmu_counters_mask, CCN_NUM_PMU_EVENT_COUNTERS + 1); } static int arm_ccn_pmu_event_add(struct perf_event *event, int flags) { int err; struct hw_perf_event *hw = &event->hw; struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); err = arm_ccn_pmu_event_alloc(event); if (err) return err; /* * Pin the timer, so that the overflows are handled by the chosen * event->cpu (this is the same one as presented in "cpumask" * attribute). */ if (!ccn->irq && arm_ccn_pmu_active_counters(ccn) == 1) hrtimer_start(&ccn->dt.hrtimer, arm_ccn_pmu_timer_period(), HRTIMER_MODE_REL_PINNED); 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) { struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); arm_ccn_pmu_event_stop(event, PERF_EF_UPDATE); arm_ccn_pmu_event_release(event); if (!ccn->irq && arm_ccn_pmu_active_counters(ccn) == 0) hrtimer_cancel(&ccn->dt.hrtimer); } static void arm_ccn_pmu_event_read(struct perf_event *event) { arm_ccn_pmu_event_update(event); } static void arm_ccn_pmu_enable(struct pmu *pmu) { struct arm_ccn *ccn = pmu_to_arm_ccn(pmu); u32 val = readl(ccn->dt.base + CCN_DT_PMCR); val |= CCN_DT_PMCR__PMU_EN; writel(val, ccn->dt.base + CCN_DT_PMCR); } static void arm_ccn_pmu_disable(struct pmu *pmu) { struct arm_ccn *ccn = pmu_to_arm_ccn(pmu); u32 val = readl(ccn->dt.base + CCN_DT_PMCR); val &= ~CCN_DT_PMCR__PMU_EN; writel(val, ccn->dt.base + CCN_DT_PMCR); } 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 int arm_ccn_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node) { struct arm_ccn_dt *dt = hlist_entry_safe(node, struct arm_ccn_dt, node); struct arm_ccn *ccn = container_of(dt, struct arm_ccn, dt); unsigned int target; if (!cpumask_test_and_clear_cpu(cpu, &dt->cpu)) return 0; target = cpumask_any_but(cpu_online_mask, cpu); if (target >= nr_cpu_ids) return 0; perf_pmu_migrate_context(&dt->pmu, cpu, target); cpumask_set_cpu(target, &dt->cpu); if (ccn->irq) WARN_ON(irq_set_affinity_hint(ccn->irq, &dt->cpu) != 0); return 0; } static DEFINE_IDA(arm_ccn_pmu_ida); static int arm_ccn_pmu_init(struct arm_ccn *ccn) { int i; char *name; int err; /* 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 { name = devm_kasprintf(ccn->dev, GFP_KERNEL, "ccn_%d", ccn->dt.id); if (!name) { err = -ENOMEM; goto error_choose_name; } } /* Perf driver registration */ ccn->dt.pmu = (struct pmu) { .module = THIS_MODULE, .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, .pmu_enable = arm_ccn_pmu_enable, .pmu_disable = arm_ccn_pmu_disable, }; /* No overflow interrupt? Have to use a timer instead. */ if (!ccn->irq) { 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; } /* Pick one CPU which we will use to collect data from CCN... */ cpumask_set_cpu(get_cpu(), &ccn->dt.cpu); /* Also make sure that the overflow interrupt is handled by this CPU */ if (ccn->irq) { err = irq_set_affinity_hint(ccn->irq, &ccn->dt.cpu); if (err) { dev_err(ccn->dev, "Failed to set interrupt affinity!\n"); goto error_set_affinity; } } err = perf_pmu_register(&ccn->dt.pmu, name, -1); if (err) goto error_pmu_register; cpuhp_state_add_instance_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE, &ccn->dt.node); put_cpu(); return 0; error_pmu_register: error_set_affinity: put_cpu(); error_choose_name: ida_simple_remove(&arm_ccn_pmu_ida, ccn->dt.id); 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); return err; } static void arm_ccn_pmu_cleanup(struct arm_ccn *ccn) { int i; cpuhp_state_remove_instance_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE, &ccn->dt.node); if (ccn->irq) irq_set_affinity_hint(ccn->irq, NULL); 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: ccn->mn_id = id; return 0; 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; unsigned int irq; 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); ccn->base = devm_ioremap_resource(ccn->dev, res); if (IS_ERR(ccn->base)) return PTR_ERR(ccn->base); res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (!res) return -EINVAL; irq = res->start; /* 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, irq, arm_ccn_irq_handler, IRQF_NOBALANCING | IRQF_NO_THREAD, dev_name(ccn->dev), ccn); if (err) return err; ccn->irq = irq; } /* Build topology */ err = arm_ccn_for_each_valid_region(ccn, arm_ccn_get_nodes_num); if (err) return err; ccn->node = devm_kcalloc(ccn->dev, ccn->num_nodes, sizeof(*ccn->node), GFP_KERNEL); ccn->xp = devm_kcalloc(ccn->dev, ccn->num_xps, sizeof(*ccn->node), 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-502", }, { .compatible = "arm,ccn-504", }, {}, }; MODULE_DEVICE_TABLE(of, arm_ccn_match); 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, ret; ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_CCN_ONLINE, "perf/arm/ccn:online", NULL, arm_ccn_pmu_offline_cpu); if (ret) return ret; for (i = 0; i < ARRAY_SIZE(arm_ccn_pmu_events); i++) arm_ccn_pmu_events_attrs[i] = &arm_ccn_pmu_events[i].attr.attr; ret = platform_driver_register(&arm_ccn_driver); if (ret) cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_CCN_ONLINE); return ret; } static void __exit arm_ccn_exit(void) { platform_driver_unregister(&arm_ccn_driver); cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_CCN_ONLINE); } module_init(arm_ccn_init); module_exit(arm_ccn_exit); MODULE_AUTHOR("Pawel Moll <pawel.moll@arm.com>"); MODULE_LICENSE("GPL v2");
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