bybrooklyn/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-04-18 14:53:58 -04:00
Code Issues Packages Projects Releases Wiki Activity

crypto: hisilicon - add device load query functionality to debugfs

Browse Source 
The accelerator device supports usage statistics. This patch enables
obtaining the accelerator's usage through the "dev_usage" file.
The returned number expressed as a percentage as a percentage.

Signed-off-by: Zongyu Wu <wuzongyu1@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Zongyu Wu
2026-03-13 17:40:39 +08:00
committed by Herbert Xu
parent 3414c80977
commit b44c7129f1
8 changed files with 135 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
drivers/crypto/hisilicon/debugfs.c
View File

@@ -1040,6 +1040,57 @@ void hisi_qm_show_last_dfx_regs(struct hisi_qm *qm)
}
}
static int qm_usage_percent(struct hisi_qm *qm, int chan_num)
{
u32 val, used_bw, total_bw;
val = readl(qm->io_base + QM_CHANNEL_USAGE_OFFSET +
chan_num * QM_CHANNEL_ADDR_INTRVL);
used_bw = lower_16_bits(val);
total_bw = upper_16_bits(val);
if (!total_bw)
return -EIO;
if (total_bw <= used_bw)
return QM_MAX_DEV_USAGE;
return (used_bw * QM_DEV_USAGE_RATE) / total_bw;
}
static int qm_usage_show(struct seq_file *s, void *unused)
{
struct hisi_qm *qm = s->private;
bool dev_is_active = true;
int i, ret;
/* If device is in suspended, usage is 0. */
ret = hisi_qm_get_dfx_access(qm);
if (ret == -EAGAIN) {
dev_is_active = false;
} else if (ret) {
dev_err(&qm->pdev->dev, "failed to get dfx access for usage_show!\n");
return ret;
}
ret = 0;
for (i = 0; i < qm->channel_data.channel_num; i++) {
if (dev_is_active) {
ret = qm_usage_percent(qm, i);
if (ret < 0) {
hisi_qm_put_dfx_access(qm);
return ret;
}
}
seq_printf(s, "%s: %d\n", qm->channel_data.channel_name[i], ret);
}
if (dev_is_active)
hisi_qm_put_dfx_access(qm);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(qm_usage);
static int qm_diff_regs_show(struct seq_file *s, void *unused)
{
struct hisi_qm *qm = s->private;
@@ -1159,6 +1210,9 @@ void hisi_qm_debug_init(struct hisi_qm *qm)
debugfs_create_file("diff_regs", 0444, qm->debug.qm_d,
qm, &qm_diff_regs_fops);
if (qm->ver >= QM_HW_V5)
debugfs_create_file("dev_usage", 0444, qm->debug.debug_root, qm, &qm_usage_fops);
debugfs_create_file("regs", 0444, qm->debug.qm_d, qm, &qm_regs_fops);
debugfs_create_file("cmd", 0600, qm->debug.qm_d, qm, &qm_cmd_fops);