[PATCH 2/3] crypto: hisilicon/qm - obtain stop queue status
From: Weili Qian
Date: Sat Jan 27 2024 - 08:16:47 EST
The debugfs files 'dev_state' and 'dev_timeout' are added.
Users can query the current queue stop status through these two
files. And set the waiting timeout when the queue is released.
dev_state: if dev_timeout is set, dev_state indicates the status
of stopping the queue. 0 indicates that the queue is stopped
successfully. Other values indicate that the queue stops fail.
if dev_timeout is not set, the value of dev_state is 0;
dev_timeout: If the queue fails to stop, the queue is released
after waiting dev_timeout * 20ms.
Signed-off-by: Weili Qian <qianweili@xxxxxxxxxx>
---
Documentation/ABI/testing/debugfs-hisi-hpre | 15 ++++
Documentation/ABI/testing/debugfs-hisi-sec | 15 ++++
Documentation/ABI/testing/debugfs-hisi-zip | 15 ++++
drivers/crypto/hisilicon/debugfs.c | 5 ++
drivers/crypto/hisilicon/qm.c | 97 +++++++++++++++------
include/linux/hisi_acc_qm.h | 14 +++
6 files changed, 135 insertions(+), 26 deletions(-)
diff --git a/Documentation/ABI/testing/debugfs-hisi-hpre b/Documentation/ABI/testing/debugfs-hisi-hpre
index 6ed9258605c7..e6394a2fb371 100644
--- a/Documentation/ABI/testing/debugfs-hisi-hpre
+++ b/Documentation/ABI/testing/debugfs-hisi-hpre
@@ -118,6 +118,21 @@ 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>/qm/dev_timeout
+Date: Jan 2024
+Contact: linux-crypto@xxxxxxxxxxxxxxx
+Description: Set the wait time when stop queue fails. Available for both PF
+ and VF, and take no other effect on HPRE.
+ 0: not wait(default), others value: wait dev_timeout * 20 microsecond.
+
+What: /sys/kernel/debug/hisi_hpre/<bdf>/qm/dev_state
+Date: Jan 2024
+Contact: linux-crypto@xxxxxxxxxxxxxxx
+Description: Dump the stop queue status of the QM. The default value is 0,
+ if dev_timeout is set, when stop queue fails, the dev_state
+ will return non-zero value. Available for both PF and VF,
+ and take no other effect on HPRE.
+
What: /sys/kernel/debug/hisi_hpre/<bdf>/hpre_dfx/diff_regs
Date: Mar 2022
Contact: linux-crypto@xxxxxxxxxxxxxxx
diff --git a/Documentation/ABI/testing/debugfs-hisi-sec b/Documentation/ABI/testing/debugfs-hisi-sec
index 403f5de96318..2b5db193b5e6 100644
--- a/Documentation/ABI/testing/debugfs-hisi-sec
+++ b/Documentation/ABI/testing/debugfs-hisi-sec
@@ -98,6 +98,21 @@ 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>/qm/dev_timeout
+Date: Jan 2024
+Contact: linux-crypto@xxxxxxxxxxxxxxx
+Description: Set the wait time when stop queue fails. Available for both PF
+ and VF, and take no other effect on SEC.
+ 0: not wait(default), others value: wait dev_timeout * 20 microsecond.
+
+What: /sys/kernel/debug/hisi_sec2/<bdf>/qm/dev_state
+Date: Jan 2024
+Contact: linux-crypto@xxxxxxxxxxxxxxx
+Description: Dump the stop queue status of the QM. The default value is 0,
+ if dev_timeout is set, when stop queue fails, the dev_state
+ will return non-zero value. Available for both PF and VF,
+ and take no other effect on SEC.
+
What: /sys/kernel/debug/hisi_sec2/<bdf>/sec_dfx/diff_regs
Date: Mar 2022
Contact: linux-crypto@xxxxxxxxxxxxxxx
diff --git a/Documentation/ABI/testing/debugfs-hisi-zip b/Documentation/ABI/testing/debugfs-hisi-zip
index 2394e6a3cfe2..260c514e0e9e 100644
--- a/Documentation/ABI/testing/debugfs-hisi-zip
+++ b/Documentation/ABI/testing/debugfs-hisi-zip
@@ -111,6 +111,21 @@ 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>/qm/dev_timeout
+Date: Jan 2024
+Contact: linux-crypto@xxxxxxxxxxxxxxx
+Description: Set the wait time when stop queue fails. Available for both PF
+ and VF, and take no other effect on ZIP.
+ 0: not wait(default), others value: wait dev_timeout * 20 microsecond.
+
+What: /sys/kernel/debug/hisi_zip/<bdf>/qm/dev_state
+Date: Jan 2024
+Contact: linux-crypto@xxxxxxxxxxxxxxx
+Description: Dump the stop queue status of the QM. The default value is 0,
+ if dev_timeout is set, when stop queue fails, the dev_state
+ will return non-zero value. Available for both PF and VF,
+ and take no other effect on ZIP.
+
What: /sys/kernel/debug/hisi_zip/<bdf>/zip_dfx/diff_regs
Date: Mar 2022
Contact: linux-crypto@xxxxxxxxxxxxxxx
diff --git a/drivers/crypto/hisilicon/debugfs.c b/drivers/crypto/hisilicon/debugfs.c
index 06e67eda409f..cd67fa348ca7 100644
--- a/drivers/crypto/hisilicon/debugfs.c
+++ b/drivers/crypto/hisilicon/debugfs.c
@@ -1112,6 +1112,7 @@ DEFINE_DEBUGFS_ATTRIBUTE(qm_atomic64_ops, qm_debugfs_atomic64_get,
void hisi_qm_debug_init(struct hisi_qm *qm)
{
struct dfx_diff_registers *qm_regs = qm->debug.qm_diff_regs;
+ struct qm_dev_dfx *dev_dfx = &qm->debug.dev_dfx;
struct qm_dfx *dfx = &qm->debug.dfx;
struct dentry *qm_d;
void *data;
@@ -1140,6 +1141,10 @@ void hisi_qm_debug_init(struct hisi_qm *qm)
debugfs_create_file("status", 0444, qm->debug.qm_d, qm,
&qm_status_fops);
+
+ debugfs_create_u32("dev_state", 0444, qm->debug.qm_d, &dev_dfx->dev_state);
+ debugfs_create_u32("dev_timeout", 0644, qm->debug.qm_d, &dev_dfx->dev_timeout);
+
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,
diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index 3b015482b4e6..75d0b2ea117e 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -2037,43 +2037,25 @@ static void qp_stop_fail_cb(struct hisi_qp *qp)
}
}
-/**
- * qm_drain_qp() - Drain a qp.
- * @qp: The qp we want to drain.
- *
- * Determine whether the queue is cleared by judging the tail pointers of
- * sq and cq.
- */
-static int qm_drain_qp(struct hisi_qp *qp)
+static int qm_wait_qp_empty(struct hisi_qm *qm, u32 *state, u32 qp_id)
{
- struct hisi_qm *qm = qp->qm;
struct device *dev = &qm->pdev->dev;
struct qm_sqc sqc;
struct qm_cqc cqc;
int ret, i = 0;
- /* No need to judge if master OOO is blocked. */
- if (qm_check_dev_error(qm))
- return 0;
-
- /* Kunpeng930 supports drain qp by device */
- if (test_bit(QM_SUPPORT_STOP_QP, &qm->caps)) {
- ret = qm_stop_qp(qp);
- if (ret)
- dev_err(dev, "Failed to stop qp(%u)!\n", qp->qp_id);
- return ret;
- }
-
while (++i) {
- ret = qm_set_and_get_xqc(qm, QM_MB_CMD_SQC, &sqc, qp->qp_id, 1);
+ ret = qm_set_and_get_xqc(qm, QM_MB_CMD_SQC, &sqc, qp_id, 1);
if (ret) {
dev_err_ratelimited(dev, "Failed to dump sqc!\n");
+ *state = DUMP_SQC_FAIL;
return ret;
}
- ret = qm_set_and_get_xqc(qm, QM_MB_CMD_CQC, &cqc, qp->qp_id, 1);
+ ret = qm_set_and_get_xqc(qm, QM_MB_CMD_CQC, &cqc, qp_id, 1);
if (ret) {
dev_err_ratelimited(dev, "Failed to dump cqc!\n");
+ *state = DUMP_CQC_FAIL;
return ret;
}
@@ -2082,8 +2064,9 @@ static int qm_drain_qp(struct hisi_qp *qp)
break;
if (i == MAX_WAIT_COUNTS) {
- dev_err(dev, "Fail to empty queue %u!\n", qp->qp_id);
- return -EBUSY;
+ dev_err(dev, "Fail to empty queue %u!\n", qp_id);
+ *state = STOP_QUEUE_FAIL;
+ return -ETIMEDOUT;
}
usleep_range(WAIT_PERIOD_US_MIN, WAIT_PERIOD_US_MAX);
@@ -2092,6 +2075,49 @@ static int qm_drain_qp(struct hisi_qp *qp)
return 0;
}
+/**
+ * qm_drain_qp() - Drain a qp.
+ * @qp: The qp we want to drain.
+ *
+ * If the device does not support stopping queue by sending mailbox,
+ * determine whether the queue is cleared by judging the tail pointers of
+ * sq and cq.
+ */
+static int qm_drain_qp(struct hisi_qp *qp)
+{
+ struct hisi_qm *qm = qp->qm;
+ struct hisi_qm *pf_qm = pci_get_drvdata(pci_physfn(qm->pdev));
+ u32 state = 0;
+ int ret;
+
+ /* No need to judge if master OOO is blocked. */
+ if (qm_check_dev_error(pf_qm))
+ return 0;
+
+ /* HW V3 supports drain qp by device */
+ if (test_bit(QM_SUPPORT_STOP_QP, &qm->caps)) {
+ ret = qm_stop_qp(qp);
+ if (ret) {
+ dev_err(&qm->pdev->dev, "Failed to stop qp!\n");
+ state = STOP_QUEUE_FAIL;
+ goto set_dev_state;
+ }
+ return ret;
+ }
+
+ ret = qm_wait_qp_empty(qm, &state, qp->qp_id);
+ if (ret)
+ goto set_dev_state;
+
+ return 0;
+
+set_dev_state:
+ if (qm->debug.dev_dfx.dev_timeout)
+ qm->debug.dev_dfx.dev_state = state;
+
+ return ret;
+}
+
static int qm_stop_qp_nolock(struct hisi_qp *qp)
{
struct hisi_qm *qm = qp->qm;
@@ -2319,7 +2345,26 @@ static int hisi_qm_uacce_start_queue(struct uacce_queue *q)
static void hisi_qm_uacce_stop_queue(struct uacce_queue *q)
{
- hisi_qm_stop_qp(q->priv);
+ struct hisi_qp *qp = q->priv;
+ struct hisi_qm *qm = qp->qm;
+ struct qm_dev_dfx *dev_dfx = &qm->debug.dev_dfx;
+ u32 i = 0;
+
+ hisi_qm_stop_qp(qp);
+
+ if (!dev_dfx->dev_timeout || !dev_dfx->dev_state)
+ return;
+
+ while (++i) {
+ if (!i || i > dev_dfx->dev_timeout) {
+ dev_err(&qm->pdev->dev, "Stop q %u timeout, state %u\n",
+ qp->qp_id, dev_dfx->dev_state);
+ dev_dfx->dev_state = FINISH_WAIT;
+ break;
+ }
+
+ msleep(WAIT_PERIOD);
+ }
}
static int hisi_qm_is_q_updated(struct uacce_queue *q)
diff --git a/include/linux/hisi_acc_qm.h b/include/linux/hisi_acc_qm.h
index 720f10874a66..ec5a70ade511 100644
--- a/include/linux/hisi_acc_qm.h
+++ b/include/linux/hisi_acc_qm.h
@@ -158,6 +158,19 @@ enum qm_cap_bits {
QM_SUPPORT_RPM,
};
+enum qm_dev_fail_state {
+ STOP_QUEUE_FAIL = 1,
+ ALLOC_CTX_FAIL,
+ DUMP_SQC_FAIL,
+ DUMP_CQC_FAIL,
+ FINISH_WAIT,
+};
+
+struct qm_dev_dfx {
+ u32 dev_state;
+ u32 dev_timeout;
+};
+
struct qm_dev_alg {
u64 alg_msk;
const char *alg;
@@ -191,6 +204,7 @@ struct qm_debug {
struct dentry *debug_root;
struct dentry *qm_d;
struct debugfs_file files[DEBUG_FILE_NUM];
+ struct qm_dev_dfx dev_dfx;
unsigned int *qm_last_words;
/* ACC engines recoreding last regs */
unsigned int *last_words;
--
2.33.0