crypto: hisilicon/qm - support get device state

Support get device current state. The value 0 indicates that
the device is busy, and the value 1 indicates that the
device is idle. When the device is in suspended, 1 is returned.

Signed-off-by: Weili Qian <qianweili@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/Documentation/ABI/testing/debugfs-hisi-hpre b/Documentation/ABI/testing/debugfs-hisi-hpre
index 8e8de49..6ed9258 100644 (file)
--- a/Documentation/ABI/testing/debugfs-hisi-hpre
+++ b/Documentation/ABI/testing/debugfs-hisi-hpre
@@ -111,6 +111,13 @@ Description:       QM debug registers(regs) read hardware register value. This
                node is used to show the change of the qm register values. This
                node can be help users to check the change of register values.
 
+What:          /sys/kernel/debug/hisi_hpre/<bdf>/qm/qm_state
+Date:          Jan 2024
+Contact:       linux-crypto@vger.kernel.org
+Description:   Dump the state of the device.
+               0: busy, 1: idle.
+               Only available for PF, and take no other effect on HPRE.
+
 What:          /sys/kernel/debug/hisi_hpre/<bdf>/hpre_dfx/diff_regs
 Date:          Mar 2022
 Contact:       linux-crypto@vger.kernel.org

diff --git a/Documentation/ABI/testing/debugfs-hisi-sec b/Documentation/ABI/testing/debugfs-hisi-sec
index deeefe2..403f5de 100644 (file)
--- a/Documentation/ABI/testing/debugfs-hisi-sec
+++ b/Documentation/ABI/testing/debugfs-hisi-sec
@@ -91,6 +91,13 @@ Description: QM debug registers(regs) read hardware register value. This
                node is used to show the change of the qm register values. This
                node can be help users to check the change of register values.
 
+What:          /sys/kernel/debug/hisi_sec2/<bdf>/qm/qm_state
+Date:          Jan 2024
+Contact:       linux-crypto@vger.kernel.org
+Description:   Dump the state of the device.
+               0: busy, 1: idle.
+               Only available for PF, and take no other effect on SEC.
+
 What:          /sys/kernel/debug/hisi_sec2/<bdf>/sec_dfx/diff_regs
 Date:          Mar 2022
 Contact:       linux-crypto@vger.kernel.org

diff --git a/Documentation/ABI/testing/debugfs-hisi-zip b/Documentation/ABI/testing/debugfs-hisi-zip
index 593714a..2394e6a 100644 (file)
--- a/Documentation/ABI/testing/debugfs-hisi-zip
+++ b/Documentation/ABI/testing/debugfs-hisi-zip
@@ -104,6 +104,13 @@ Description:       QM debug registers(regs) read hardware register value. This
                node is used to show the change of the qm registers value. This
                node can be help users to check the change of register values.
 
+What:          /sys/kernel/debug/hisi_zip/<bdf>/qm/qm_state
+Date:          Jan 2024
+Contact:       linux-crypto@vger.kernel.org
+Description:   Dump the state of the device.
+               0: busy, 1: idle.
+               Only available for PF, and take no other effect on ZIP.
+
 What:          /sys/kernel/debug/hisi_zip/<bdf>/zip_dfx/diff_regs
 Date:          Mar 2022
 Contact:       linux-crypto@vger.kernel.org

diff --git a/drivers/crypto/hisilicon/debugfs.c b/drivers/crypto/hisilicon/debugfs.c
index 80ed4b2..615c8e1 100644 (file)
--- a/drivers/crypto/hisilicon/debugfs.c
+++ b/drivers/crypto/hisilicon/debugfs.c
@@ -24,6 +24,8 @@
 #define QM_DFX_QN_SHIFT                        16
 #define QM_DFX_CNT_CLR_CE              0x100118
 #define QM_DBG_WRITE_LEN               1024
+#define QM_IN_IDLE_ST_REG              0x1040e4
+#define QM_IN_IDLE_STATE               0x1
 
 static const char * const qm_debug_file_name[] = {
        [CURRENT_QM]   = "current_qm",
@@ -1001,6 +1003,30 @@ static int qm_diff_regs_show(struct seq_file *s, void *unused)
 }
 DEFINE_SHOW_ATTRIBUTE(qm_diff_regs);
 
+static int qm_state_show(struct seq_file *s, void *unused)
+{
+       struct hisi_qm *qm = s->private;
+       u32 val;
+       int ret;
+
+       /* If device is in suspended, directly return the idle state. */
+       ret = hisi_qm_get_dfx_access(qm);
+       if (!ret) {
+               val = readl(qm->io_base + QM_IN_IDLE_ST_REG);
+               hisi_qm_put_dfx_access(qm);
+       } else if (ret == -EAGAIN) {
+               val = QM_IN_IDLE_STATE;
+       } else {
+               return ret;
+       }
+
+       seq_printf(s, "%u\n", val);
+
+       return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(qm_state);
+
 static ssize_t qm_status_read(struct file *filp, char __user *buffer,
                              size_t count, loff_t *pos)
 {
@@ -1072,6 +1098,9 @@ void hisi_qm_debug_init(struct hisi_qm *qm)
 
        /* only show this in PF */
        if (qm->fun_type == QM_HW_PF) {
+               debugfs_create_file("qm_state", 0444, qm->debug.qm_d,
+                                       qm, &qm_state_fops);
+
                qm_create_debugfs_file(qm, qm->debug.debug_root, CURRENT_QM);
                for (i = CURRENT_Q; i < DEBUG_FILE_NUM; i++)
                        qm_create_debugfs_file(qm, qm->debug.qm_d, i);