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| author | Longfang Liu <liulongfang@huawei.com> | 2020-05-15 17:13:55 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-05-23 00:08:21 +1000 |
| commit | 0a3a3960210b4bc6cfe5db45b4af714ee4a010e1 (patch) | |
| tree | 716c5ee523f456f64cedace48f5cb10012d48d54 /drivers/crypto | |
| parent | 8502652542c6684dd142f74c1bd1772730f653bd (diff) | |
| download | linux-0a3a3960210b4bc6cfe5db45b4af714ee4a010e1.tar.gz | |
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.c | 34 |
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, |