From: Longfang Liu <liulongfang@xxxxxxxxxx>
The QM driver uses debugfs to provides the current state of
the QM state machine
Signed-off-by: Longfang Liu <liulongfang@xxxxxxxxxx>
Signed-off-by: Shukun Tan <tanshukun1@xxxxxxxxxx>
Reviewed-by: Zhou Wang <wangzhou1@xxxxxxxxxxxxx>
---
Documentation/ABI/testing/debugfs-hisi-hpre | 7 ++++++
Documentation/ABI/testing/debugfs-hisi-sec | 7 ++++++
Documentation/ABI/testing/debugfs-hisi-zip | 7 ++++++
drivers/crypto/hisilicon/qm.c | 34 +++++++++++++++++++++++++++++
4 files changed, 55 insertions(+)
diff --git a/Documentation/ABI/testing/debugfs-hisi-hpre b/Documentation/ABI/testing/debugfs-hisi-hpre
index 1f96665..093cf46 100644
--- a/Documentation/ABI/testing/debugfs-hisi-hpre
+++ b/Documentation/ABI/testing/debugfs-hisi-hpre
@@ -86,3 +86,10 @@ Date: Apr 2020
Contact: linux-crypto@xxxxxxxxxxxxxxx
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@xxxxxxxxxxxxxxx
+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.
diff --git a/Documentation/ABI/testing/debugfs-hisi-sec b/Documentation/ABI/testing/debugfs-hisi-sec
index c3ba09c..54699a1 100644
--- a/Documentation/ABI/testing/debugfs-hisi-sec
+++ b/Documentation/ABI/testing/debugfs-hisi-sec
@@ -72,3 +72,10 @@ Date: Apr 2020
Contact: linux-crypto@xxxxxxxxxxxxxxx
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@xxxxxxxxxxxxxxx
+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.
diff --git a/Documentation/ABI/testing/debugfs-hisi-zip b/Documentation/ABI/testing/debugfs-hisi-zip
index cc568fd..1002a01 100644
--- a/Documentation/ABI/testing/debugfs-hisi-zip
+++ b/Documentation/ABI/testing/debugfs-hisi-zip
@@ -79,3 +79,10 @@ Date: Apr 2020
Contact: linux-crypto@xxxxxxxxxxxxxxx
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@xxxxxxxxxxxxxxx
+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.
diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index 744d131..7c1982f 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -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 @@ int hisi_qm_stop(struct hisi_qm *qm)
}
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,
--
2.7.4
