--- /dev/null
+/*
+ * Copyright 2019 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Author: Jonathan Kim <jonathan.kim@amd.com>
+ *
+ */
+
+#include <linux/perf_event.h>
+#include <linux/init.h>
+#include "amdgpu.h"
+#include "amdgpu_pmu.h"
+#include "df_v3_6.h"
+
+#define PMU_NAME_SIZE 32
+
+/* record to keep track of pmu entry per pmu type per device */
+struct amdgpu_pmu_entry {
+ struct list_head entry;
+ struct amdgpu_device *adev;
+ struct pmu pmu;
+ unsigned int pmu_perf_type;
+};
+
+static LIST_HEAD(amdgpu_pmu_list);
+
+
+/* initialize perf counter */
+static int amdgpu_perf_event_init(struct perf_event *event)
+{
+ struct hw_perf_event *hwc = &event->hw;
+
+ /* test the event attr type check for PMU enumeration */
+ if (event->attr.type != event->pmu->type)
+ return -ENOENT;
+
+ /* update the hw_perf_event struct with config data */
+ hwc->conf = event->attr.config;
+
+ return 0;
+}
+
+/* start perf counter */
+static void amdgpu_perf_start(struct perf_event *event, int flags)
+{
+ struct hw_perf_event *hwc = &event->hw;
+ struct amdgpu_pmu_entry *pe = container_of(event->pmu,
+ struct amdgpu_pmu_entry,
+ pmu);
+
+ if (WARN_ON_ONCE(!(hwc->state & PERF_HES_STOPPED)))
+ return;
+
+ WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));
+ hwc->state = 0;
+
+ switch (pe->pmu_perf_type) {
+ case PERF_TYPE_AMDGPU_DF:
+ if (!(flags & PERF_EF_RELOAD))
+ pe->adev->df_funcs->pmc_start(pe->adev, hwc->conf, 1);
+
+ pe->adev->df_funcs->pmc_start(pe->adev, hwc->conf, 0);
+ break;
+ default:
+ break;
+ }
+
+ perf_event_update_userpage(event);
+
+}
+
+/* read perf counter */
+static void amdgpu_perf_read(struct perf_event *event)
+{
+ struct hw_perf_event *hwc = &event->hw;
+ struct amdgpu_pmu_entry *pe = container_of(event->pmu,
+ struct amdgpu_pmu_entry,
+ pmu);
+
+ u64 count, prev;
+
+ do {
+ prev = local64_read(&hwc->prev_count);
+
+ switch (pe->pmu_perf_type) {
+ case PERF_TYPE_AMDGPU_DF:
+ pe->adev->df_funcs->pmc_get_count(pe->adev, hwc->conf,
+ &count);
+ break;
+ default:
+ count = 0;
+ break;
+ };
+ } while (local64_cmpxchg(&hwc->prev_count, prev, count) != prev);
+
+ local64_add(count - prev, &event->count);
+}
+
+/* stop perf counter */
+static void amdgpu_perf_stop(struct perf_event *event, int flags)
+{
+ struct hw_perf_event *hwc = &event->hw;
+ struct amdgpu_pmu_entry *pe = container_of(event->pmu,
+ struct amdgpu_pmu_entry,
+ pmu);
+
+ if (hwc->state & PERF_HES_UPTODATE)
+ return;
+
+ switch (pe->pmu_perf_type) {
+ case PERF_TYPE_AMDGPU_DF:
+ pe->adev->df_funcs->pmc_stop(pe->adev, hwc->conf, 0);
+ break;
+ default:
+ break;
+ };
+
+ WARN_ON_ONCE(hwc->state & PERF_HES_STOPPED);
+ hwc->state |= PERF_HES_STOPPED;
+
+ if (hwc->state & PERF_HES_UPTODATE)
+ return;
+
+ amdgpu_perf_read(event);
+ hwc->state |= PERF_HES_UPTODATE;
+}
+
+/* add perf counter */
+static int amdgpu_perf_add(struct perf_event *event, int flags)
+{
+ struct hw_perf_event *hwc = &event->hw;
+ int retval;
+
+ struct amdgpu_pmu_entry *pe = container_of(event->pmu,
+ struct amdgpu_pmu_entry,
+ pmu);
+
+ event->hw.state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
+
+ switch (pe->pmu_perf_type) {
+ case PERF_TYPE_AMDGPU_DF:
+ retval = pe->adev->df_funcs->pmc_start(pe->adev, hwc->conf, 1);
+ break;
+ default:
+ return 0;
+ };
+
+ if (retval)
+ return retval;
+
+ if (flags & PERF_EF_START)
+ amdgpu_perf_start(event, PERF_EF_RELOAD);
+
+ return retval;
+
+}
+
+/* delete perf counter */
+static void amdgpu_perf_del(struct perf_event *event, int flags)
+{
+ struct hw_perf_event *hwc = &event->hw;
+ struct amdgpu_pmu_entry *pe = container_of(event->pmu,
+ struct amdgpu_pmu_entry,
+ pmu);
+
+ amdgpu_perf_stop(event, PERF_EF_UPDATE);
+
+ switch (pe->pmu_perf_type) {
+ case PERF_TYPE_AMDGPU_DF:
+ pe->adev->df_funcs->pmc_stop(pe->adev, hwc->conf, 1);
+ break;
+ default:
+ break;
+ };
+
+ perf_event_update_userpage(event);
+}
+
+/* vega20 pmus */
+
+/* init pmu tracking per pmu type */
+static int init_pmu_by_type(struct amdgpu_device *adev,
+ const struct attribute_group *attr_groups[],
+ char *pmu_type_name, char *pmu_file_prefix,
+ unsigned int pmu_perf_type,
+ unsigned int num_counters)
+{
+ char pmu_name[PMU_NAME_SIZE];
+ struct amdgpu_pmu_entry *pmu_entry;
+ int ret = 0;
+
+ pmu_entry = kzalloc(sizeof(struct amdgpu_pmu_entry), GFP_KERNEL);
+
+ if (!pmu_entry)
+ return -ENOMEM;
+
+ pmu_entry->adev = adev;
+ pmu_entry->pmu = (struct pmu){
+ .event_init = amdgpu_perf_event_init,
+ .add = amdgpu_perf_add,
+ .del = amdgpu_perf_del,
+ .start = amdgpu_perf_start,
+ .stop = amdgpu_perf_stop,
+ .read = amdgpu_perf_read,
+ .task_ctx_nr = perf_invalid_context,
+ };
+
+ pmu_entry->pmu.attr_groups = attr_groups;
+ pmu_entry->pmu_perf_type = pmu_perf_type;
+ snprintf(pmu_name, PMU_NAME_SIZE, "%s_%d",
+ pmu_file_prefix, adev->ddev->primary->index);
+
+ ret = perf_pmu_register(&pmu_entry->pmu, pmu_name, -1);
+
+ if (ret) {
+ kfree(pmu_entry);
+ pr_warn("Error initializing AMDGPU %s PMUs.\n", pmu_type_name);
+ return ret;
+ }
+
+ pr_info("Detected AMDGPU %s Counters. # of Counters = %d.\n",
+ pmu_type_name, num_counters);
+
+ list_add_tail(&pmu_entry->entry, &amdgpu_pmu_list);
+
+ return 0;
+}
+
+/* init amdgpu_pmu */
+int amdgpu_pmu_init(struct amdgpu_device *adev)
+{
+ int ret = 0;
+
+ switch (adev->asic_type) {
+ case CHIP_VEGA20:
+ /* init df */
+ ret = init_pmu_by_type(adev, df_v3_6_attr_groups,
+ "DF", "amdgpu_df", PERF_TYPE_AMDGPU_DF,
+ DF_V3_6_MAX_COUNTERS);
+
+ /* other pmu types go here*/
+ break;
+ default:
+ return 0;
+ }
+
+ return 0;
+}
+
+
+/* destroy all pmu data associated with target device */
+void amdgpu_pmu_fini(struct amdgpu_device *adev)
+{
+ struct amdgpu_pmu_entry *pe, *temp;
+
+ list_for_each_entry_safe(pe, temp, &amdgpu_pmu_list, entry) {
+ if (pe->adev == adev) {
+ list_del(&pe->entry);
+ perf_pmu_unregister(&pe->pmu);
+ kfree(pe);
+ }
+ }
+}
--- /dev/null
+/*
+ * Copyright 2019 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Author: Jonathan Kim <jonathan.kim@amd.com>
+ *
+ */
+
+#ifndef _AMDGPU_PMU_H_
+#define _AMDGPU_PMU_H_
+
+enum amdgpu_pmu_perf_type {
+ PERF_TYPE_AMDGPU_DF = 0,
+ PERF_TYPE_AMDGPU_MAX
+};
+
+int amdgpu_pmu_init(struct amdgpu_device *adev);
+void amdgpu_pmu_fini(struct amdgpu_device *adev);
+
+#endif /* _AMDGPU_PMU_H_ */
projects / openwrt / staging / blogic.git / commitdiff