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Date: Mon, 2 Oct 2017 10:03:22 +0100
From: Gilad Ben-Yossef <gilad@...yossef.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Ofir Drang <ofir.drang@....com>, linux-crypto@...r.kernel.org,
driverdev-devel@...uxdriverproject.org, devel@...verdev.osuosl.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] staging: ccree: remove sysfs if of deleted code
The ccree cycle count mechanism was removed in
commit 7f821f0c6ffa ("staging: ccree: remove cycle count debug support")
but the sysfs interface lingered on. Remove it now.
Signed-off-by: Gilad Ben-Yossef <gilad@...yossef.com>
---
drivers/staging/ccree/ssi_sysfs.c | 266 --------------------------------------
1 file changed, 266 deletions(-)
diff --git a/drivers/staging/ccree/ssi_sysfs.c b/drivers/staging/ccree/ssi_sysfs.c
index f7e0c502..e0810e2 100644
--- a/drivers/staging/ccree/ssi_sysfs.c
+++ b/drivers/staging/ccree/ssi_sysfs.c
@@ -24,260 +24,6 @@
static struct ssi_drvdata *sys_get_drvdata(void);
-#ifdef CC_CYCLE_COUNT
-
-#include <asm/timex.h>
-
-struct stat_item {
- unsigned int min;
- unsigned int max;
- cycles_t sum;
- unsigned int count;
-};
-
-struct stat_name {
- const char *op_type_name;
- const char *stat_phase_name[MAX_STAT_PHASES];
-};
-
-static struct stat_name stat_name_db[MAX_STAT_OP_TYPES] = {
- {
- /* STAT_OP_TYPE_NULL */
- .op_type_name = "NULL",
- .stat_phase_name = {NULL},
- },
- {
- .op_type_name = "Encode",
- .stat_phase_name[STAT_PHASE_0] = "Init and sanity checks",
- .stat_phase_name[STAT_PHASE_1] = "Map buffers",
- .stat_phase_name[STAT_PHASE_2] = "Create sequence",
- .stat_phase_name[STAT_PHASE_3] = "Send Request",
- .stat_phase_name[STAT_PHASE_4] = "HW-Q push",
- .stat_phase_name[STAT_PHASE_5] = "Sequence completion",
- .stat_phase_name[STAT_PHASE_6] = "HW cycles",
- },
- { .op_type_name = "Decode",
- .stat_phase_name[STAT_PHASE_0] = "Init and sanity checks",
- .stat_phase_name[STAT_PHASE_1] = "Map buffers",
- .stat_phase_name[STAT_PHASE_2] = "Create sequence",
- .stat_phase_name[STAT_PHASE_3] = "Send Request",
- .stat_phase_name[STAT_PHASE_4] = "HW-Q push",
- .stat_phase_name[STAT_PHASE_5] = "Sequence completion",
- .stat_phase_name[STAT_PHASE_6] = "HW cycles",
- },
- { .op_type_name = "Setkey",
- .stat_phase_name[STAT_PHASE_0] = "Init and sanity checks",
- .stat_phase_name[STAT_PHASE_1] = "Copy key to ctx",
- .stat_phase_name[STAT_PHASE_2] = "Create sequence",
- .stat_phase_name[STAT_PHASE_3] = "Send Request",
- .stat_phase_name[STAT_PHASE_4] = "HW-Q push",
- .stat_phase_name[STAT_PHASE_5] = "Sequence completion",
- .stat_phase_name[STAT_PHASE_6] = "HW cycles",
- },
- {
- .op_type_name = "Generic",
- .stat_phase_name[STAT_PHASE_0] = "Interrupt",
- .stat_phase_name[STAT_PHASE_1] = "ISR-to-Tasklet",
- .stat_phase_name[STAT_PHASE_2] = "Tasklet start-to-end",
- .stat_phase_name[STAT_PHASE_3] = "Tasklet:user_cb()",
- .stat_phase_name[STAT_PHASE_4] = "Tasklet:dx_X_complete() - w/o X_complete()",
- .stat_phase_name[STAT_PHASE_5] = "",
- .stat_phase_name[STAT_PHASE_6] = "HW cycles",
- }
-};
-
-/*
- * Structure used to create a directory
- * and its attributes in sysfs.
- */
-struct sys_dir {
- struct kobject *sys_dir_kobj;
- struct attribute_group sys_dir_attr_group;
- struct attribute **sys_dir_attr_list;
- u32 num_of_attrs;
- struct ssi_drvdata *drvdata; /* Associated driver context */
-};
-
-/* top level directory structures */
-struct sys_dir sys_top_dir;
-
-static DEFINE_SPINLOCK(stat_lock);
-
-/* List of DBs */
-static struct stat_item stat_host_db[MAX_STAT_OP_TYPES][MAX_STAT_PHASES];
-static struct stat_item stat_cc_db[MAX_STAT_OP_TYPES][MAX_STAT_PHASES];
-
-static void init_db(struct stat_item item[MAX_STAT_OP_TYPES][MAX_STAT_PHASES])
-{
- unsigned int i, j;
-
- /* Clear db */
- for (i = 0; i < MAX_STAT_OP_TYPES; i++) {
- for (j = 0; j < MAX_STAT_PHASES; j++) {
- item[i][j].min = 0xFFFFFFFF;
- item[i][j].max = 0;
- item[i][j].sum = 0;
- item[i][j].count = 0;
- }
- }
-}
-
-static void update_db(struct stat_item *item, unsigned int result)
-{
- item->count++;
- item->sum += result;
- if (result < item->min)
- item->min = result;
- if (result > item->max)
- item->max = result;
-}
-
-static void display_db(struct stat_item item[MAX_STAT_OP_TYPES][MAX_STAT_PHASES])
-{
- unsigned int i, j;
- u64 avg;
-
- for (i = STAT_OP_TYPE_ENCODE; i < MAX_STAT_OP_TYPES; i++) {
- for (j = 0; j < MAX_STAT_PHASES; j++) {
- if (item[i][j].count > 0) {
- avg = (u64)item[i][j].sum;
- do_div(avg, item[i][j].count);
- SSI_LOG_ERR("%s, %s: min=%d avg=%d max=%d sum=%lld count=%d\n",
- stat_name_db[i].op_type_name,
- stat_name_db[i].stat_phase_name[j],
- item[i][j].min, (int)avg,
- item[i][j].max,
- (long long)item[i][j].sum,
- item[i][j].count);
- }
- }
- }
-}
-
-/**************************************
- * Attributes show functions section *
- **************************************/
-
-static ssize_t ssi_sys_stats_host_db_clear(struct kobject *kobj,
- struct kobj_attribute *attr,
- const char *buf, size_t count)
-{
- init_db(stat_host_db);
- return count;
-}
-
-static ssize_t ssi_sys_stats_cc_db_clear(struct kobject *kobj,
- struct kobj_attribute *attr,
- const char *buf, size_t count)
-{
- init_db(stat_cc_db);
- return count;
-}
-
-static ssize_t ssi_sys_stat_host_db_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf)
-{
- int i, j;
- char line[512];
- u32 min_cyc, max_cyc;
- u64 avg;
- ssize_t buf_len, tmp_len = 0;
-
- buf_len = scnprintf(buf, PAGE_SIZE,
- "phase\t\t\t\t\t\t\tmin[cy]\tavg[cy]\tmax[cy]\t#samples\n");
- if (buf_len < 0)/* scnprintf shouldn't return negative value according to its implementation*/
- return buf_len;
- for (i = STAT_OP_TYPE_ENCODE; i < MAX_STAT_OP_TYPES; i++) {
- for (j = 0; j < MAX_STAT_PHASES - 1; j++) {
- if (stat_host_db[i][j].count > 0) {
- avg = (u64)stat_host_db[i][j].sum;
- do_div(avg, stat_host_db[i][j].count);
- min_cyc = stat_host_db[i][j].min;
- max_cyc = stat_host_db[i][j].max;
- } else {
- avg = min_cyc = max_cyc = 0;
- }
- tmp_len = scnprintf(line, 512,
- "%s::%s\t\t\t\t\t%6u\t%6u\t%6u\t%7u\n",
- stat_name_db[i].op_type_name,
- stat_name_db[i].stat_phase_name[j],
- min_cyc, (unsigned int)avg, max_cyc,
- stat_host_db[i][j].count);
- if (tmp_len < 0)/* scnprintf shouldn't return negative value according to its implementation*/
- return buf_len;
- if (buf_len + tmp_len >= PAGE_SIZE)
- return buf_len;
- buf_len += tmp_len;
- strncat(buf, line, 512);
- }
- }
- return buf_len;
-}
-
-static ssize_t ssi_sys_stat_cc_db_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf)
-{
- int i;
- char line[256];
- u32 min_cyc, max_cyc;
- u64 avg;
- ssize_t buf_len, tmp_len = 0;
-
- buf_len = scnprintf(buf, PAGE_SIZE,
- "phase\tmin[cy]\tavg[cy]\tmax[cy]\t#samples\n");
- if (buf_len < 0)/* scnprintf shouldn't return negative value according to its implementation*/
- return buf_len;
- for (i = STAT_OP_TYPE_ENCODE; i < MAX_STAT_OP_TYPES; i++) {
- if (stat_cc_db[i][STAT_PHASE_6].count > 0) {
- avg = (u64)stat_cc_db[i][STAT_PHASE_6].sum;
- do_div(avg, stat_cc_db[i][STAT_PHASE_6].count);
- min_cyc = stat_cc_db[i][STAT_PHASE_6].min;
- max_cyc = stat_cc_db[i][STAT_PHASE_6].max;
- } else {
- avg = min_cyc = max_cyc = 0;
- }
- tmp_len = scnprintf(line, 256, "%s\t%6u\t%6u\t%6u\t%7u\n",
- stat_name_db[i].op_type_name, min_cyc,
- (unsigned int)avg, max_cyc,
- stat_cc_db[i][STAT_PHASE_6].count);
-
- if (tmp_len < 0)/* scnprintf shouldn't return negative value according to its implementation*/
- return buf_len;
-
- if (buf_len + tmp_len >= PAGE_SIZE)
- return buf_len;
- buf_len += tmp_len;
- strncat(buf, line, 256);
- }
- return buf_len;
-}
-
-void update_host_stat(unsigned int op_type, unsigned int phase, cycles_t result)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&stat_lock, flags);
- update_db(&stat_host_db[op_type][phase], (unsigned int)result);
- spin_unlock_irqrestore(&stat_lock, flags);
-}
-
-void update_cc_stat(
- unsigned int op_type,
- unsigned int phase,
- unsigned int elapsed_cycles)
-{
- update_db(&stat_cc_db[op_type][phase], elapsed_cycles);
-}
-
-void display_all_stat_db(void)
-{
- SSI_LOG_ERR("\n======= CYCLE COUNT STATS =======\n");
- display_db(stat_host_db);
- SSI_LOG_ERR("\n======= CC HW CYCLE COUNT STATS =======\n");
- display_db(stat_cc_db);
-}
-#endif /*CC_CYCLE_COUNT*/
-
static ssize_t ssi_sys_regdump_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
@@ -304,12 +50,6 @@ static ssize_t ssi_sys_help_show(struct kobject *kobj,
{
char *help_str[] = {
"cat reg_dump ", "Print several of CC register values",
- #if defined CC_CYCLE_COUNT
- "cat stats_host ", "Print host statistics",
- "echo <number> > stats_host", "Clear host statistics database",
- "cat stats_cc ", "Print CC statistics",
- "echo <number> > stats_cc ", "Clear CC statistics database",
- #endif
};
int i = 0, offset = 0;
@@ -414,12 +154,6 @@ int ssi_sysfs_init(struct kobject *sys_dev_obj, struct ssi_drvdata *drvdata)
{
int retval;
-#if defined CC_CYCLE_COUNT
- /* Init. statistics */
- init_db(stat_host_db);
- init_db(stat_cc_db);
-#endif
-
SSI_LOG_ERR("setup sysfs under %s\n", sys_dev_obj->name);
/* Initialize top directory */
--
2.7.4
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