crypto: hisilicon/qm - add debugfs to the QM state machine (0a3a3960) · Commits · 戴 / test

Documentation/ABI/testing/debugfs-hisi-hpre

+7 −0

Original line number	Diff line number	Diff line
		@@ -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 −0

Original line number	Diff line number	Diff line
		@@ -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 −0

Original line number	Diff line number	Diff line
		@@ -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 −0

Original line number	Diff line number	Diff line
		@@ -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,