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Message-Id: <20190926125501.1616-5-prarit@redhat.com>
Date: Thu, 26 Sep 2019 08:54:58 -0400
From: Prarit Bhargava <prarit@...hat.com>
To: platform-driver-x86@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Prarit Bhargava <prarit@...hat.com>,
Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Subject: [PATCH 4/7] intel-speed-select: Add configuration for CascadeLake-N
Create a 'dummy' pkg_dev struct for use by CascadeLake-N processors. This
struct will be used in later patches to implement info and status calls
for CascadeLake-N SST-BF.
Signed-off-by: Prarit Bhargava <prarit@...hat.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
---
.../x86/intel-speed-select/isst-config.c | 98 ++++++++++++++++++-
.../x86/intel-speed-select/isst-display.c | 2 -
tools/power/x86/intel-speed-select/isst.h | 2 +
3 files changed, 99 insertions(+), 3 deletions(-)
diff --git a/tools/power/x86/intel-speed-select/isst-config.c b/tools/power/x86/intel-speed-select/isst-config.c
index ae8e3b5153ad..33f328d971d3 100644
--- a/tools/power/x86/intel-speed-select/isst-config.c
+++ b/tools/power/x86/intel-speed-select/isst-config.c
@@ -735,6 +735,94 @@ _get_tdp_level("get-config-current_level", levels, current_level,
"Current TDP Level");
_get_tdp_level("get-lock-status", levels, locked, "TDP lock status");
+struct isst_pkg_ctdp cn_pkg_dev;
+
+static int cn_get_base_ratio(void)
+{
+ FILE *fp;
+ char *begin, *end, *line;
+ char number[5];
+ float value = 0;
+ size_t n;
+
+ fp = fopen("/proc/cpuinfo", "r");
+ if (!fp)
+ err(-1, "cannot open /proc/cpuinfo\n");
+
+ while (getline(&line, &n, fp) > 0) {
+ if (strstr(line, "model name")) {
+ /* this is true for CascadeLake-N */
+ begin = strstr(line, "@ ") + 2;
+ end = strstr(line, "GHz");
+ strncpy(number, begin, end - begin);
+ value = atof(number) * 10;
+ break;
+ }
+ }
+ free(line);
+ fclose(fp);
+
+ return (int)(value);
+}
+
+static void cascadelaken_config(void)
+{
+ int i;
+ unsigned long cpu_bf;
+ struct isst_pkg_ctdp_level_info *ctdp_level;
+ struct isst_pbf_info *pbf_info;
+
+ ctdp_level = &cn_pkg_dev.ctdp_level[0];
+ pbf_info = &ctdp_level->pbf_info;
+
+ /* find the frequency base ratio */
+ ctdp_level->tdp_ratio = cn_get_base_ratio();
+ if (ctdp_level->tdp_ratio == 0)
+ err(-1, "cn base ratio is zero\n");
+
+ /* find the high and low priority frequencies */
+ pbf_info->p1_high = 0;
+ pbf_info->p1_low = ~0;
+ for (i = 0; i < topo_max_cpus; i++) {
+ cpu_bf = parse_int_file(1,
+ "/sys/devices/system/cpu/cpu%d/cpufreq/base_frequency",
+ i);
+ if (cpu_bf > pbf_info->p1_high)
+ pbf_info->p1_high = cpu_bf;
+ if (cpu_bf < pbf_info->p1_low)
+ pbf_info->p1_low = cpu_bf;
+ }
+
+ if (pbf_info->p1_high == ~0UL)
+ err(-1, "maximum base frequency not set\n");
+
+ if (pbf_info->p1_low == 0)
+ err(-1, "minimum base frequency not set\n");
+
+ /* convert frequencies back to ratios */
+ pbf_info->p1_high = pbf_info->p1_high / DISP_FREQ_MULTIPLIER;
+ pbf_info->p1_low = pbf_info->p1_low / DISP_FREQ_MULTIPLIER;
+
+ /* create high priority cpu mask */
+ pbf_info->core_cpumask_size = alloc_cpu_set(&pbf_info->core_cpumask);
+ for (i = 0; i < topo_max_cpus; i++) {
+ cpu_bf = parse_int_file(1,
+ "/sys/devices/system/cpu/cpu%d/cpufreq/base_frequency",
+ i);
+ cpu_bf = cpu_bf / DISP_FREQ_MULTIPLIER;
+ if (cpu_bf == pbf_info->p1_high)
+ CPU_SET_S(i, pbf_info->core_cpumask_size,
+ pbf_info->core_cpumask);
+ }
+
+ /* extra ctdp & pbf struct parameters */
+ ctdp_level->processed = 1;
+ ctdp_level->pbf_support = 1; /* PBF is always supported and enabled */
+ ctdp_level->pbf_enabled = 1;
+ ctdp_level->fact_support = 0; /* FACT is never supported */
+ ctdp_level->fact_enabled = 0;
+}
+
static void dump_isst_config_for_cpu(int cpu, void *arg1, void *arg2,
void *arg3, void *arg4)
{
@@ -1546,7 +1634,10 @@ void process_command(int argc, char **argv,
}
}
- create_cpu_map();
+ if (cpu_model != 0x55)
+ create_cpu_map();
+ else
+ cascadelaken_config();
i = 0;
while (cmds[i].feature) {
@@ -1562,6 +1653,11 @@ void process_command(int argc, char **argv,
if (!matched)
fprintf(stderr, "Invalid command\n");
+
+ if (cpu_model != 0x55) {
+ /* this was allocated in cascadelaken_config() */
+ free_cpu_set(cn_pkg_dev.ctdp_level[0].pbf_info.core_cpumask);
+ }
}
static void usage(void)
diff --git a/tools/power/x86/intel-speed-select/isst-display.c b/tools/power/x86/intel-speed-select/isst-display.c
index 40346d534f78..1caa7ae25245 100644
--- a/tools/power/x86/intel-speed-select/isst-display.c
+++ b/tools/power/x86/intel-speed-select/isst-display.c
@@ -6,8 +6,6 @@
#include "isst.h"
-#define DISP_FREQ_MULTIPLIER 100
-
static void printcpulist(int str_len, char *str, int mask_size,
cpu_set_t *cpu_mask)
{
diff --git a/tools/power/x86/intel-speed-select/isst.h b/tools/power/x86/intel-speed-select/isst.h
index d280b27d600d..0dcae17b3945 100644
--- a/tools/power/x86/intel-speed-select/isst.h
+++ b/tools/power/x86/intel-speed-select/isst.h
@@ -69,6 +69,8 @@
#define PM_CLOS_OFFSET 0x08
#define PQR_ASSOC_OFFSET 0x20
+#define DISP_FREQ_MULTIPLIER 100
+
struct isst_clos_config {
int pkg_id;
int die_id;
--
2.21.0
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