/*
* Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/hashtable.h>
#include <nvgpu/kmem.h>
#include <nvgpu/bug.h>
#include <nvgpu/hashtable.h>
#include "os_linux.h"
#include "gk20a/gk20a.h"
#include "platform_gk20a.h"
#include "platform_gk20a_tegra.h"
#include "platform_gp10b.h"
#include "platform_gp10b_tegra.h"
#include "platform_ecc_sysfs.h"
static u32 gen_ecc_hash_key(char *str)
{
int i = 0;
u32 hash_key = 0x811c9dc5;
while (str[i]) {
hash_key *= 0x1000193;
hash_key ^= (u32)(str[i]);
i++;
};
return hash_key;
}
static ssize_t ecc_stat_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
const char *ecc_stat_full_name = attr->attr.name;
const char *ecc_stat_base_name;
unsigned int hw_unit;
unsigned int subunit;
struct gk20a_ecc_stat *ecc_stat;
u32 hash_key;
struct gk20a *g = get_gk20a(dev);
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
if (sscanf(ecc_stat_full_name, "ltc%u_lts%u", &hw_unit,
&subunit) == 2) {
ecc_stat_base_name = &(ecc_stat_full_name[strlen("ltc0_lts0_")]);
hw_unit = g->gr.slices_per_ltc * hw_unit + subunit;
} else if (sscanf(ecc_stat_full_name, "ltc%u", &hw_unit) == 1) {
ecc_stat_base_name = &(ecc_stat_full_name[strlen("ltc0_")]);
} else if (sscanf(ecc_stat_full_name, "gpc0_tpc%u", &hw_unit) == 1) {
ecc_stat_base_name = &(ecc_stat_full_name[strlen("gpc0_tpc0_")]);
} else if (sscanf(ecc_stat_full_name, "gpc%u", &hw_unit) == 1) {
ecc_stat_base_name = &(ecc_stat_full_name[strlen("gpc0_")]);
} else if (sscanf(ecc_stat_full_name, "eng%u", &hw_unit) == 1) {
ecc_stat_base_name = &(ecc_stat_full_name[strlen("eng0_")]);
} else {
return snprintf(buf,
PAGE_SIZE,
"Error: Invalid ECC stat name!\n");
}
hash_key = gen_ecc_hash_key((char *)ecc_stat_base_name);
hash_for_each_possible(l->ecc_sysfs_stats_htable,
ecc_stat,
hash_node,
hash_key) {
if (hw_unit >= ecc_stat->count)
continue;
if (!strcmp(ecc_stat_full_name, ecc_stat->names[hw_unit]))
return snprintf(buf, PAGE_SIZE, "%u\n", ecc_stat->counters[hw_unit]);
}
return snprintf(buf, PAGE_SIZE, "Error: No ECC stat found!\n");
}
int nvgpu_gr_ecc_stat_create(struct device *dev,
int is_l2, char *ecc_stat_name,
struct gk20a_ecc_stat *ecc_stat)
{
struct gk20a *g = get_gk20a(dev);
char *ltc_unit_name = "ltc";
char *gr_unit_name = "gpc0_tpc";
char *lts_unit_name = "lts";
int num_hw_units = 0;
int num_subunits = 0;
if (is_l2 == 1)
num_hw_units = g->ltc_count;
else if (is_l2 == 2) {
num_hw_units = g->ltc_count;
num_subunits = g->gr.slices_per_ltc;
} else
num_hw_units = g->gr.tpc_count;
return nvgpu_ecc_stat_create(dev, num_hw_units, num_subunits,
is_l2 ? ltc_unit_name : gr_unit_name,
num_subunits ? lts_unit_name: NULL,
ecc_stat_name,
ecc_stat);
}
int nvgpu_ecc_stat_create(struct device *dev,
int num_hw_units, int num_subunits,
char *ecc_unit_name, char *ecc_subunit_name,
char *ecc_stat_name,
struct gk20a_ecc_stat *ecc_stat)
{
int error = 0;
struct gk20a *g = get_gk20a(dev);
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
int hw_unit = 0;
int subunit = 0;
int element = 0;
u32 hash_key = 0;
struct device_attribute *dev_attr_array;
int num_elements = num_subunits ? num_subunits * num_hw_units :
num_hw_units;
/* Allocate arrays */
dev_attr_array = nvgpu_kzalloc(g, sizeof(struct device_attribute) *
num_elements);
ecc_stat->counters = nvgpu_kzalloc(g, sizeof(u32) * num_elements);
ecc_stat->names = nvgpu_kzalloc(g, sizeof(char *) * num_elements);
for (hw_unit = 0; hw_unit < num_elements; hw_unit++) {
ecc_stat->names[hw_unit] = nvgpu_kzalloc(g, sizeof(char) *
ECC_STAT_NAME_MAX_SIZE);
}
ecc_stat->count = num_elements;
if (num_subunits) {
for (hw_unit = 0; hw_unit < num_hw_units; hw_unit++) {
for (subunit = 0; subunit < num_subunits; subunit++) {
element = hw_unit*num_subunits + subunit;
snprintf(ecc_stat->names[element],
ECC_STAT_NAME_MAX_SIZE,
"%s%d_%s%d_%s",
ecc_unit_name,
hw_unit,
ecc_subunit_name,
subunit,
ecc_stat_name);
sysfs_attr_init(&dev_attr_array[element].attr);
dev_attr_array[element].attr.name =
ecc_stat->names[element];
dev_attr_array[element].attr.mode =
VERIFY_OCTAL_PERMISSIONS(S_IRUGO);
dev_attr_array[element].show = ecc_stat_show;
dev_attr_array[element].store = NULL;
/* Create sysfs file */
error |= device_create_file(dev,
&dev_attr_array[element]);
}
}
} else {
for (hw_unit = 0; hw_unit < num_hw_units; hw_unit++) {
/* Fill in struct device_attribute members */
snprintf(ecc_stat->names[hw_unit],
ECC_STAT_NAME_MAX_SIZE,
"%s%d_%s",
ecc_unit_name,
hw_unit,
ecc_stat_name);
sysfs_attr_init(&dev_attr_array[hw_unit].attr);
dev_attr_array[hw_unit].attr.name =
ecc_stat->names[hw_unit];
dev_attr_array[hw_unit].attr.mode =
VERIFY_OCTAL_PERMISSIONS(S_IRUGO);
dev_attr_array[hw_unit].show = ecc_stat_show;
dev_attr_array[hw_unit].store = NULL;
/* Create sysfs file */
error |= device_create_file(dev,
&dev_attr_array[hw_unit]);
}
}
/* Add hash table entry */
hash_key = gen_ecc_hash_key(ecc_stat_name);
hash_add(l->ecc_sysfs_stats_htable,
&ecc_stat->hash_node,
hash_key);
ecc_stat->attr_array = dev_attr_array;
return error;
}
void nvgpu_gr_ecc_stat_remove(struct device *dev,
int is_l2, struct gk20a_ecc_stat *ecc_stat)
{
struct gk20a *g = get_gk20a(dev);
int num_hw_units = 0;
int num_subunits = 0;
if (is_l2 == 1)
num_hw_units = g->ltc_count;
else if (is_l2 == 2) {
num_hw_units = g->ltc_count;
num_subunits = g->gr.slices_per_ltc;
} else
num_hw_units = g->gr.tpc_count;
nvgpu_ecc_stat_remove(dev, num_hw_units, num_subunits, ecc_stat);
}
void nvgpu_ecc_stat_remove(struct device *dev,
int num_hw_units, int num_subunits,
struct gk20a_ecc_stat *ecc_stat)
{
struct gk20a *g = get_gk20a(dev);
struct device_attribute *dev_attr_array = ecc_stat->attr_array;
int hw_unit = 0;
int subunit = 0;
int element = 0;
int num_elements = num_subunits ? num_subunits * num_hw_units :
num_hw_units;
/* Remove sysfs files */
if (num_subunits) {
for (hw_unit = 0; hw_unit < num_hw_units; hw_unit++) {
for (subunit = 0; subunit < num_subunits; subunit++) {
element = hw_unit * num_subunits + subunit;
device_remove_file(dev,
&dev_attr_array[element]);
}
}
} else {
for (hw_unit = 0; hw_unit < num_hw_units; hw_unit++)
device_remove_file(dev, &dev_attr_array[hw_unit]);
}
/* Remove hash table entry */
hash_del(&ecc_stat->hash_node);
/* Free arrays */
nvgpu_kfree(g, ecc_stat->counters);
for (hw_unit = 0; hw_unit < num_elements; hw_unit++)
nvgpu_kfree(g, ecc_stat->names[hw_unit]);
nvgpu_kfree(g, ecc_stat->names);
nvgpu_kfree(g, dev_attr_array);
}
