crypto: hisilicon/qm - add stop queue by hardware

mainline inclusion
from mainline-v5.13-rc1
commit 7ed83901
category: feature
bugzilla: 173981
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7ed83901326f781524af2d969185440efe23f964

----------------------------------------------------------------------

Kunpeng930 could be able to stop queue by writing hardware registers,
which will trigger tasks in device to be flushed out.

In order to be compatible with the kunpeng920 driver, add 'qm_hw_ops_v3' to
adapt Kunpeng930. And 'stop_qp' callback is added in 'qm_hw_ops_v3' to
write hardware registers. Call 'stop_qp' to drain the tasks in device
before releasing queue.
Signed-off-by: NWeili Qian <qianweili@huawei.com>
Reviewed-by: NLongfang Liu <liulongfang@huawei.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NMingqiang Ling <lingmingqiang@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/crypto/hisilicon/qm.c

@@ -38,6 +38,7 @@
 #define QM_MB_CMD_SQC_BT		0x4
 #define QM_MB_CMD_CQC_BT		0x5
 #define QM_MB_CMD_SQC_VFT_V2		0x6
+#define QM_MB_CMD_STOP_QP		0x8
 
 #define QM_MB_CMD_SEND_BASE		0x300
 #define QM_MB_EVENT_SHIFT		8
@@ -349,6 +350,7 @@ struct hisi_qm_hw_ops {
 	void (*hw_error_init)(struct hisi_qm *qm, u32 ce, u32 nfe, u32 fe);
 	void (*hw_error_uninit)(struct hisi_qm *qm);
 	enum acc_err_result (*hw_error_handle)(struct hisi_qm *qm);
+	int (*stop_qp)(struct hisi_qp *qp);
 };
 
 struct qm_dfx_item {
@@ -1711,6 +1713,11 @@ static enum acc_err_result qm_hw_error_handle_v2(struct hisi_qm *qm)
 	return ACC_ERR_RECOVERED;
 }
 
+static int qm_stop_qp(struct hisi_qp *qp)
+{
+	return qm_mb(qp->qm, QM_MB_CMD_STOP_QP, 0, qp->qp_id, 0);
+}
+
 static const struct hisi_qm_hw_ops qm_hw_ops_v1 = {
 	.qm_db = qm_db_v1,
 	.get_irq_num = qm_get_irq_num_v1,
@@ -1726,6 +1733,16 @@ static const struct hisi_qm_hw_ops qm_hw_ops_v2 = {
 	.hw_error_handle = qm_hw_error_handle_v2,
 };
 
+static const struct hisi_qm_hw_ops qm_hw_ops_v3 = {
+	.get_vft = qm_get_vft_v2,
+	.qm_db = qm_db_v2,
+	.get_irq_num = qm_get_irq_num_v2,
+	.hw_error_init = qm_hw_error_init_v2,
+	.hw_error_uninit = qm_hw_error_uninit_v2,
+	.hw_error_handle = qm_hw_error_handle_v2,
+	.stop_qp = qm_stop_qp,
+};
+
 static void *qm_get_avail_sqe(struct hisi_qp *qp)
 {
 	struct hisi_qp_status *qp_status = &qp->qp_status;
@@ -2005,6 +2022,14 @@ static int qm_drain_qp(struct hisi_qp *qp)
 	if (qm->err_status.is_qm_ecc_mbit || qm->err_status.is_dev_ecc_mbit)
 		return 0;
 
+	/* Kunpeng930 supports drain qp by device */
+	if (qm->ops->stop_qp) {
+		ret = qm->ops->stop_qp(qp);
+		if (ret)
+			dev_err(dev, "Failed to stop qp(%u)!\n", qp->qp_id);
+		return ret;
+	}
+
 	addr = qm_ctx_alloc(qm, size, &dma_addr);
 	if (IS_ERR(addr)) {
 		dev_err(dev, "Failed to alloc ctx for sqc and cqc!\n");
@@ -2565,8 +2590,10 @@ static void hisi_qm_pre_init(struct hisi_qm *qm)
 
 	if (qm->ver == QM_HW_V1)
 		qm->ops = &qm_hw_ops_v1;
-	else
+	else if (qm->ver == QM_HW_V2)
 		qm->ops = &qm_hw_ops_v2;
+	else
+		qm->ops = &qm_hw_ops_v3;
 
 	pci_set_drvdata(pdev, qm);
 	mutex_init(&qm->mailbox_lock);