1 files changed, 148 insertions, 0 deletions
diff --git a/drivers/crypto/qat/qat_common/adf_gen4_pfvf.c b/drivers/crypto/qat/qat_common/adf_gen4_pfvf.c
new file mode 100644
index 000000000000..8efbedf63bc8
--- /dev/null
+++ b/drivers/crypto/qat/qat_common/adf_gen4_pfvf.c
@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
+/* Copyright(c) 2021 Intel Corporation */
+#include <linux/iopoll.h>
+#include <linux/mutex.h>
+#include <linux/types.h>
+#include "adf_accel_devices.h"
+#include "adf_common_drv.h"
+#include "adf_gen4_pfvf.h"
+#include "adf_pfvf_pf_proto.h"
+#include "adf_pfvf_utils.h"
+
+#define ADF_4XXX_MAX_NUM_VFS		16
+
+#define ADF_4XXX_PF2VM_OFFSET(i)	(0x40B010 + ((i) * 0x20))
+#define ADF_4XXX_VM2PF_OFFSET(i)	(0x40B014 + ((i) * 0x20))
+
+/* VF2PF interrupt source registers */
+#define ADF_4XXX_VM2PF_SOU(i)		(0x41A180 + ((i) * 4))
+#define ADF_4XXX_VM2PF_MSK(i)		(0x41A1C0 + ((i) * 4))
+#define ADF_4XXX_VM2PF_INT_EN_MSK	BIT(0)
+
+#define ADF_PFVF_GEN4_MSGTYPE_SHIFT	2
+#define ADF_PFVF_GEN4_MSGTYPE_MASK	0x3F
+#define ADF_PFVF_GEN4_MSGDATA_SHIFT	8
+#define ADF_PFVF_GEN4_MSGDATA_MASK	0xFFFFFF
+
+static const struct pfvf_csr_format csr_gen4_fmt = {
+	{ ADF_PFVF_GEN4_MSGTYPE_SHIFT, ADF_PFVF_GEN4_MSGTYPE_MASK },
+	{ ADF_PFVF_GEN4_MSGDATA_SHIFT, ADF_PFVF_GEN4_MSGDATA_MASK },
+};
+
+static u32 adf_gen4_pf_get_pf2vf_offset(u32 i)
+{
+	return ADF_4XXX_PF2VM_OFFSET(i);
+}
+
+static u32 adf_gen4_pf_get_vf2pf_offset(u32 i)
+{
+	return ADF_4XXX_VM2PF_OFFSET(i);
+}
+
+static u32 adf_gen4_get_vf2pf_sources(void __iomem *pmisc_addr)
+{
+	int i;
+	u32 sou, mask;
+	int num_csrs = ADF_4XXX_MAX_NUM_VFS;
+	u32 vf_mask = 0;
+
+	for (i = 0; i < num_csrs; i++) {
+		sou = ADF_CSR_RD(pmisc_addr, ADF_4XXX_VM2PF_SOU(i));
+		mask = ADF_CSR_RD(pmisc_addr, ADF_4XXX_VM2PF_MSK(i));
+		sou &= ~mask;
+		vf_mask |= sou << i;
+	}
+
+	return vf_mask;
+}
+
+static void adf_gen4_enable_vf2pf_interrupts(void __iomem *pmisc_addr,
+					     u32 vf_mask)
+{
+	int num_csrs = ADF_4XXX_MAX_NUM_VFS;
+	unsigned long mask = vf_mask;
+	unsigned int val;
+	int i;
+
+	for_each_set_bit(i, &mask, num_csrs) {
+		unsigned int offset = ADF_4XXX_VM2PF_MSK(i);
+
+		val = ADF_CSR_RD(pmisc_addr, offset) & ~ADF_4XXX_VM2PF_INT_EN_MSK;
+		ADF_CSR_WR(pmisc_addr, offset, val);
+	}
+}
+
+static void adf_gen4_disable_vf2pf_interrupts(void __iomem *pmisc_addr,
+					      u32 vf_mask)
+{
+	int num_csrs = ADF_4XXX_MAX_NUM_VFS;
+	unsigned long mask = vf_mask;
+	unsigned int val;
+	int i;
+
+	for_each_set_bit(i, &mask, num_csrs) {
+		unsigned int offset = ADF_4XXX_VM2PF_MSK(i);
+
+		val = ADF_CSR_RD(pmisc_addr, offset) | ADF_4XXX_VM2PF_INT_EN_MSK;
+		ADF_CSR_WR(pmisc_addr, offset, val);
+	}
+}
+
+static int adf_gen4_pfvf_send(struct adf_accel_dev *accel_dev,
+			      struct pfvf_message msg, u32 pfvf_offset,
+			      struct mutex *csr_lock)
+{
+	void __iomem *pmisc_addr = adf_get_pmisc_base(accel_dev);
+	u32 csr_val;
+	int ret;
+
+	csr_val = adf_pfvf_csr_msg_of(accel_dev, msg, &csr_gen4_fmt);
+	if (unlikely(!csr_val))
+		return -EINVAL;
+
+	mutex_lock(csr_lock);
+
+	ADF_CSR_WR(pmisc_addr, pfvf_offset, csr_val | ADF_PFVF_INT);
+
+	/* Wait for confirmation from remote that it received the message */
+	ret = read_poll_timeout(ADF_CSR_RD, csr_val, !(csr_val & ADF_PFVF_INT),
+				ADF_PFVF_MSG_ACK_DELAY_US,
+				ADF_PFVF_MSG_ACK_MAX_DELAY_US,
+				true, pmisc_addr, pfvf_offset);
+	if (ret < 0)
+		dev_dbg(&GET_DEV(accel_dev), "ACK not received from remote\n");
+
+	mutex_unlock(csr_lock);
+	return ret;
+}
+
+static struct pfvf_message adf_gen4_pfvf_recv(struct adf_accel_dev *accel_dev,
+					      u32 pfvf_offset, u8 compat_ver)
+{
+	void __iomem *pmisc_addr = adf_get_pmisc_base(accel_dev);
+	u32 csr_val;
+
+	/* Read message from the CSR */
+	csr_val = ADF_CSR_RD(pmisc_addr, pfvf_offset);
+
+	/* We can now acknowledge the message reception by clearing the
+	 * interrupt bit
+	 */
+	ADF_CSR_WR(pmisc_addr, pfvf_offset, csr_val & ~ADF_PFVF_INT);
+
+	/* Return the pfvf_message format */
+	return adf_pfvf_message_of(accel_dev, csr_val, &csr_gen4_fmt);
+}
+
+void adf_gen4_init_pf_pfvf_ops(struct adf_pfvf_ops *pfvf_ops)
+{
+	pfvf_ops->enable_comms = adf_enable_pf2vf_comms;
+	pfvf_ops->get_pf2vf_offset = adf_gen4_pf_get_pf2vf_offset;
+	pfvf_ops->get_vf2pf_offset = adf_gen4_pf_get_vf2pf_offset;
+	pfvf_ops->get_vf2pf_sources = adf_gen4_get_vf2pf_sources;
+	pfvf_ops->enable_vf2pf_interrupts = adf_gen4_enable_vf2pf_interrupts;
+	pfvf_ops->disable_vf2pf_interrupts = adf_gen4_disable_vf2pf_interrupts;
+	pfvf_ops->send_msg = adf_gen4_pfvf_send;
+	pfvf_ops->recv_msg = adf_gen4_pfvf_recv;
+}
+EXPORT_SYMBOL_GPL(adf_gen4_init_pf_pfvf_ops);