crypto: hisilicon - add SRIOV support for ZIP

HiSilicon ZIP engine supports PCI SRIOV. This patch enable this feature.
User can enable VFs and pass through them to VM, same ZIP driver can work
in VM to provide ZLIB and GZIP algorithm by crypto acomp interface.

Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 79 insertions, 18 deletions

diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index c095d4747812..4f6bbdd4a25b 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -16,6 +16,7 @@
 #define QM_VF_EQ_INT_MASK		0xc
 #define QM_IRQ_NUM_V1			1
 #define QM_IRQ_NUM_PF_V2		4
+#define QM_IRQ_NUM_VF_V2		2
 
 #define QM_EQ_EVENT_IRQ_VECTOR		0
 #define QM_AEQ_EVENT_IRQ_VECTOR		1
@@ -265,6 +266,7 @@ struct qm_doorbell {
 };
 
 struct hisi_qm_hw_ops {
+	int (*get_vft)(struct hisi_qm *qm, u32 *base, u32 *number);
 	void (*qm_db)(struct hisi_qm *qm, u16 qn,
 		      u8 cmd, u16 index, u8 priority);
 	u32 (*get_irq_num)(struct hisi_qm *qm);
@@ -422,7 +424,10 @@ static u32 qm_get_irq_num_v1(struct hisi_qm *qm)
 
 static u32 qm_get_irq_num_v2(struct hisi_qm *qm)
 {
-	return QM_IRQ_NUM_PF_V2;
+	if (qm->fun_type == QM_HW_PF)
+		return QM_IRQ_NUM_PF_V2;
+	else
+		return QM_IRQ_NUM_VF_V2;
 }
 
 static struct hisi_qp *qm_to_hisi_qp(struct hisi_qm *qm, struct qm_eqe *eqe)
@@ -591,12 +596,14 @@ static int qm_irq_register(struct hisi_qm *qm)
 		if (ret)
 			goto err_aeq_irq;
 
-		ret = request_irq(pci_irq_vector(pdev,
-				  QM_ABNORMAL_EVENT_IRQ_VECTOR),
-				  qm_abnormal_irq, IRQF_SHARED,
-				  qm->dev_name, qm);
-		if (ret)
-			goto err_abonormal_irq;
+		if (qm->fun_type == QM_HW_PF) {
+			ret = request_irq(pci_irq_vector(pdev,
+					  QM_ABNORMAL_EVENT_IRQ_VECTOR),
+					  qm_abnormal_irq, IRQF_SHARED,
+					  qm->dev_name, qm);
+			if (ret)
+				goto err_abonormal_irq;
+		}
 	}
 
 	return 0;
@@ -616,8 +623,10 @@ static void qm_irq_unregister(struct hisi_qm *qm)
 
 	if (qm->ver == QM_HW_V2) {
 		free_irq(pci_irq_vector(pdev, QM_AEQ_EVENT_IRQ_VECTOR), qm);
-		free_irq(pci_irq_vector(pdev,
-					QM_ABNORMAL_EVENT_IRQ_VECTOR), qm);
+
+		if (qm->fun_type == QM_HW_PF)
+			free_irq(pci_irq_vector(pdev,
+				 QM_ABNORMAL_EVENT_IRQ_VECTOR), qm);
 	}
 }
 
@@ -717,6 +726,24 @@ static int qm_set_sqc_cqc_vft(struct hisi_qm *qm, u32 fun_num, u32 base,
 	return 0;
 }
 
+static int qm_get_vft_v2(struct hisi_qm *qm, u32 *base, u32 *number)
+{
+	u64 sqc_vft;
+	int ret;
+
+	ret = qm_mb(qm, QM_MB_CMD_SQC_VFT_V2, 0, 0, 1);
+	if (ret)
+		return ret;
+
+	sqc_vft = readl(qm->io_base + QM_MB_CMD_DATA_ADDR_L) |
+		  ((u64)readl(qm->io_base + QM_MB_CMD_DATA_ADDR_H) << 32);
+	*base = QM_SQC_VFT_BASE_MASK_V2 & (sqc_vft >> QM_SQC_VFT_BASE_SHIFT_V2);
+	*number = (QM_SQC_VFT_NUM_MASK_v2 &
+		   (sqc_vft >> QM_SQC_VFT_NUM_SHIFT_V2)) + 1;
+
+	return 0;
+}
+
 static void qm_hw_error_init_v1(struct hisi_qm *qm, u32 ce, u32 nfe, u32 fe,
 				u32 msi)
 {
@@ -815,6 +842,7 @@ static const struct hisi_qm_hw_ops qm_hw_ops_v1 = {
 };
 
 static const struct hisi_qm_hw_ops qm_hw_ops_v2 = {
+	.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,
@@ -1195,6 +1223,9 @@ int hisi_qm_init(struct hisi_qm *qm)
 	mutex_init(&qm->mailbox_lock);
 	rwlock_init(&qm->qps_lock);
 
+	dev_dbg(dev, "init qm %s with %s\n", pdev->is_physfn ? "pf" : "vf",
+		qm->use_dma_api ? "dma api" : "iommu api");
+
 	return 0;
 
 err_free_irq_vectors:
@@ -1237,6 +1268,32 @@ void hisi_qm_uninit(struct hisi_qm *qm)
 EXPORT_SYMBOL_GPL(hisi_qm_uninit);
 
 /**
+ * hisi_qm_get_vft() - Get vft from a qm.
+ * @qm: The qm we want to get its vft.
+ * @base: The base number of queue in vft.
+ * @number: The number of queues in vft.
+ *
+ * We can allocate multiple queues to a qm by configuring virtual function
+ * table. We get related configures by this function. Normally, we call this
+ * function in VF driver to get the queue information.
+ *
+ * qm hw v1 does not support this interface.
+ */
+int hisi_qm_get_vft(struct hisi_qm *qm, u32 *base, u32 *number)
+{
+	if (!base || !number)
+		return -EINVAL;
+
+	if (!qm->ops->get_vft) {
+		dev_err(&qm->pdev->dev, "Don't support vft read!\n");
+		return -EINVAL;
+	}
+
+	return qm->ops->get_vft(qm, base, number);
+}
+EXPORT_SYMBOL_GPL(hisi_qm_get_vft);
+
+/**
  * hisi_qm_set_vft() - Set "virtual function table" for a qm.
  * @fun_num: Number of operated function.
  * @qm: The qm in which to set vft, alway in a PF.
@@ -1344,13 +1401,15 @@ static int __hisi_qm_start(struct hisi_qm *qm)
 	if (qm->qp_num == 0)
 		return -EINVAL;
 
-	ret = qm_dev_mem_reset(qm);
-	if (ret)
-		return ret;
+	if (qm->fun_type == QM_HW_PF) {
+		ret = qm_dev_mem_reset(qm);
+		if (ret)
+			return ret;
 
-	ret = hisi_qm_set_vft(qm, 0, qm->qp_base, qm->qp_num);
-	if (ret)
-		return ret;
+		ret = hisi_qm_set_vft(qm, 0, qm->qp_base, qm->qp_num);
+		if (ret)
+			return ret;
+	}
 
 	QM_INIT_BUF(qm, eqe, QM_Q_DEPTH);
 	QM_INIT_BUF(qm, aeqe, QM_Q_DEPTH);
@@ -1469,9 +1528,11 @@ int hisi_qm_stop(struct hisi_qm *qm)
 		}
 	}
 
-	ret = hisi_qm_set_vft(qm, 0, 0, 0);
-	if (ret < 0)
-		dev_err(dev, "Failed to set vft!\n");
+	if (qm->fun_type == QM_HW_PF) {
+		ret = hisi_qm_set_vft(qm, 0, 0, 0);
+		if (ret < 0)
+			dev_err(dev, "Failed to set vft!\n");
+	}
 
 	return ret;
 }