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authorLongfang Liu <liulongfang@huawei.com>2020-05-15 17:13:55 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2020-05-23 00:08:21 +1000
commit0a3a3960210b4bc6cfe5db45b4af714ee4a010e1 (patch)
tree716c5ee523f456f64cedace48f5cb10012d48d54 /drivers/crypto
parent8502652542c6684dd142f74c1bd1772730f653bd (diff)
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>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/hisilicon/qm.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index 744d1310f6a9..7c1982fd2156 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 @@ 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,