/* pfmlib_intel_snbep_unc_perf.c : perf_events SNB-EP uncore support

 *

 * Copyright (c) 2012 Google, Inc

 * Contributed by Stephane Eranian <eranian@gmail.com>

 *

 * 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 AUTHORS OR COPYRIGHT

 * HOLDERS 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.

 */

#include <sys/types.h>

#include <string.h>

#include <stdlib.h>

#include <stdio.h>

#include <stdarg.h>

#include <limits.h>

/* private headers */

#include "pfmlib_priv.h"

#include "pfmlib_intel_x86_priv.h"

#include "pfmlib_intel_snbep_unc_priv.h"

#include "pfmlib_perf_event_priv.h"

static int

find_pmu_type_by_name(const char *name)

{

	char filename[PATH_MAX];

	FILE *fp;

	int ret, type;

	if (!name)

		return PFM_ERR_NOTSUPP;

	sprintf(filename, "/sys/bus/event_source/devices/%s/type", name);

	fp = fopen(filename, "r");

	if (!fp)

		return PFM_ERR_NOTSUPP;

	ret = fscanf(fp, "%d", &type);

	if (ret != 1)

		type = PFM_ERR_NOTSUPP;

	fclose(fp);

	return type;

}

int

pfm_intel_snbep_unc_get_perf_encoding(void *this, pfmlib_event_desc_t *e)

{

	pfmlib_pmu_t *pmu = this;

	struct perf_event_attr *attr = e->os_data;

	pfm_intel_x86_reg_t reg;

	int ret;

	if (!pmu->get_event_encoding[PFM_OS_NONE])

		return PFM_ERR_NOTSUPP;

	ret = pmu->get_event_encoding[PFM_OS_NONE](this, e);

	if (ret != PFM_SUCCESS)

		return ret;

	ret = find_pmu_type_by_name(pmu->perf_name);

	if (ret < 0)

		return ret;

	attr->type = ret;

	reg.val = e->codes[0];

	attr->config = reg.val;

	if (is_cbo_filt_event(this, reg) && e->count > 1) {

		if (e->count >= 2)

			attr->config1 = e->codes[1];

		if (e->count >= 3)

			attr->config1 |= e->codes[2] << 32;

	} else {

		/*

		 * various filters

		 */

		if (e->count >= 2)

			attr->config1 = e->codes[1];

		if (e->count >= 3)

			attr->config2 = e->codes[2];

	}

	/*

	 * uncore measures at all priv levels

	 *

	 * user cannot set per-event priv levels because

	 * attributes are simply not there

	 *

	 * dfl_plm is ignored in this case

	 */

	attr->exclude_hv = 0;

	attr->exclude_kernel = 0;

	attr->exclude_user = 0;

	return PFM_SUCCESS;

}

void

pfm_intel_snbep_unc_perf_validate_pattrs(void *this, pfmlib_event_desc_t *e)

{

	pfmlib_pmu_t *pmu = this;

	int no_smpl = pmu->flags & PFMLIB_PMU_FL_NO_SMPL;

	int i, compact;

	for (i = 0; i < e->npattrs; i++) {

		compact = 0;

		/* umasks never conflict */

		if (e->pattrs[i].type == PFM_ATTR_UMASK)

			continue;

		if (e->pattrs[i].ctrl == PFM_ATTR_CTRL_PERF_EVENT) {

			/* No precise sampling mode for uncore */

			if (e->pattrs[i].idx == PERF_ATTR_PR)

				compact = 1;

			/*

			 * No hypervisor for uncore

			 */

			if (e->pattrs[i].idx == PERF_ATTR_H)

				compact = 1;

			if (no_smpl

			    && (   e->pattrs[i].idx == PERF_ATTR_FR

			        || e->pattrs[i].idx == PERF_ATTR_PR

			        || e->pattrs[i].idx == PERF_ATTR_PE))

				compact = 1;

			/*

			 * uncore has no priv level support

			 */

			if (pmu->supported_plm == 0

			    && (   e->pattrs[i].idx == PERF_ATTR_U

			        || e->pattrs[i].idx == PERF_ATTR_K

			        || e->pattrs[i].idx == PERF_ATTR_MG

			        || e->pattrs[i].idx == PERF_ATTR_MH))

				compact = 1;

		}

		if (compact) {

			pfmlib_compact_pattrs(e, i);

			i--;

		}

	}

}