diff options
Diffstat (limited to 'drivers/bus/arm-ccn.c')
| -rw-r--r-- | drivers/bus/arm-ccn.c | 1597 |
1 files changed, 0 insertions, 1597 deletions
diff --git a/drivers/bus/arm-ccn.c b/drivers/bus/arm-ccn.c deleted file mode 100644 index b52332e52ca5..000000000000 --- a/drivers/bus/arm-ccn.c +++ /dev/null @@ -1,1597 +0,0 @@ -/* - * 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/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_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 || event->attr.exclude_host || - event->attr.exclude_guest) { - dev_warn(ccn->dev, "Can't exclude execution levels!\n"); - return -EINVAL; - } - - if (event->cpu < 0) { - dev_warn(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_warn(ccn->dev, "Invalid MN ID %d!\n", node_xp); - return -EINVAL; - } - break; - 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); - } - - /* - * 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; - - list_for_each_entry(sibling, &event->group_leader->sibling_list, - group_entry) - 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); - 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; - 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"); |