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crypto: hisilicon/qm - add debugfs to the QM state machine 

The QM driver uses debugfs to provides the current state of
the QM state machine

Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Signed-off-by: Shukun Tan <tanshukun1@huawei.com>
Reviewed-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Longfang Liu 2020-05-15 17:13:55 +08:00 committed by Herbert Xu
parent 8502652542
commit 0a3a396021
4 changed files with 55 additions and 0 deletions
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7
Documentation/ABI/testing/debugfs-hisi-hpre
View File

@ -86,3 +86,10 @@ Date: Apr 2020
Contact: linux-crypto@vger.kernel.org
Description: Dump the number of failed QM mailbox commands.
Available for both PF and VF, and take no other effect on HPRE.
What: /sys/kernel/debug/hisi_hpre/<bdf>/qm/status
Date: Apr 2020
Contact: linux-crypto@vger.kernel.org
Description: Dump the status of the QM.
Four states: initiated, started, stopped and closed.
Available for both PF and VF, and take no other effect on HPRE.

7
Documentation/ABI/testing/debugfs-hisi-sec
View File

@ -72,3 +72,10 @@ Date: Apr 2020
Contact: linux-crypto@vger.kernel.org
Description: Dump the number of failed QM mailbox commands.
Available for both PF and VF, and take no other effect on SEC.
What: /sys/kernel/debug/hisi_sec2/<bdf>/qm/status
Date: Apr 2020
Contact: linux-crypto@vger.kernel.org
Description: Dump the status of the QM.
Four states: initiated, started, stopped and closed.
Available for both PF and VF, and take no other effect on SEC.

7
Documentation/ABI/testing/debugfs-hisi-zip
View File

@ -79,3 +79,10 @@ Date: Apr 2020
Contact: linux-crypto@vger.kernel.org
Description: Dump the number of failed QM mailbox commands.
Available for both PF and VF, and take no other effect on ZIP.
What: /sys/kernel/debug/hisi_zip/<bdf>/qm/status
Date: Apr 2020
Contact: linux-crypto@vger.kernel.org
Description: Dump the status of the QM.
Four states: initiated, started, stopped and closed.
Available for both PF and VF, and take no other effect on ZIP.

34
drivers/crypto/hisilicon/qm.c
View File

@ -175,6 +175,7 @@
#define QM_SQE_DATA_ALIGN_MASK GENMASK(6, 0)
#define QMC_ALIGN(sz) ALIGN(sz, 32)
#define QM_DBG_READ_LEN 256
#define QM_DBG_TMP_BUF_LEN 22
#define QM_PCI_COMMAND_INVALID ~0
@ -2268,6 +2269,37 @@ err_unlock:
}
EXPORT_SYMBOL_GPL(hisi_qm_stop);
static ssize_t qm_status_read(struct file *filp, char __user *buffer,
size_t count, loff_t *pos)
{
struct hisi_qm *qm = filp->private_data;
char buf[QM_DBG_READ_LEN];
int val, cp_len, len;
if (*pos)
return 0;
if (count < QM_DBG_READ_LEN)
return -ENOSPC;
val = atomic_read(&qm->status.flags);
len = snprintf(buf, QM_DBG_READ_LEN, "%s\n", qm_s[val]);
if (!len)
return -EFAULT;
cp_len = copy_to_user(buffer, buf, len);
if (cp_len)
return -EFAULT;
return (*pos = len);
}
static const struct file_operations qm_status_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = qm_status_read,
};
static int qm_debugfs_atomic64_set(void *data, u64 val)
{
if (val)
@ -2314,6 +2346,8 @@ int hisi_qm_debug_init(struct hisi_qm *qm)
debugfs_create_file("qm_regs", 0444, qm->debug.qm_d, qm, &qm_regs_fops);
debugfs_create_file("status", 0444, qm->debug.qm_d, qm,
&qm_status_fops);
for (i = 0; i < ARRAY_SIZE(qm_dfx_files); i++) {
data = (atomic64_t *)((uintptr_t)dfx + qm_dfx_files[i].offset);
debugfs_create_file(qm_dfx_files[i].name,