Date:   Thu, 30 Mar 2017 20:08:11 +0800
From:   Wu Hao <hao.wu@...el.com>
To:     atull@...nel.org, moritz.fischer@...us.com,
        linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     luwei.kang@...el.com, yi.z.zhang@...el.com, hao.wu@...el.com,
        Tim Whisonant <tim.whisonant@...el.com>,
        Enno Luebbers <enno.luebbers@...el.com>,
        Shiva Rao <shiva.rao@...el.com>,
        Christopher Rauer <christopher.rauer@...el.com>,
        Alan Tull <alan.tull@...el.com>,
        Xiao Guangrong <guangrong.xiao@...ux.intel.com>
Subject: [PATCH 11/16] fpga: intel: fme: add partial reconfiguration sub feature support

From: Kang Luwei <luwei.kang@...el.com>

Partial Reconfiguration (PR) is the most important function for FME. It
allows reconfiguration for given Port/Accelerated Function Unit (AFU).

This patch adds support for PR sub feature. In this patch, it registers
a fpga_mgr and implements fpga_manager_ops, and invoke fpga_mgr_buf_load
for PR operation once PR request received via ioctl. Below user space
interfaces are exposed by this sub feature.

Sysfs interface:
* /sys/class/fpga/<fpga.x>/<intel-fpga-fme.x>/interface_id
  Read-only. Indicate the hardware interface information. Userspace
  applications need to check this interface to select correct green
  bitstream format before PR.

Ioctl interface:
* FPGA_FME_PORT_PR
  Do partial reconfiguration per information from userspace, including
  target port(AFU), buffer size and address info. It returns the PR status
  (PR error code if failed) to userspace.

Signed-off-by: Tim Whisonant <tim.whisonant@...el.com>
Signed-off-by: Enno Luebbers <enno.luebbers@...el.com>
Signed-off-by: Shiva Rao <shiva.rao@...el.com>
Signed-off-by: Christopher Rauer <christopher.rauer@...el.com>
Signed-off-by: Alan Tull <alan.tull@...el.com>
Signed-off-by: Kang Luwei <luwei.kang@...el.com>
Signed-off-by: Xiao Guangrong <guangrong.xiao@...ux.intel.com>
Signed-off-by: Wu Hao <hao.wu@...el.com>
---
 drivers/fpga/intel/Makefile      |   2 +-
 drivers/fpga/intel/feature-dev.h |  58 ++++++
 drivers/fpga/intel/fme-main.c    |  44 ++++-
 drivers/fpga/intel/fme-pr.c      | 400 +++++++++++++++++++++++++++++++++++++++
 drivers/fpga/intel/fme.h         |  32 ++++
 include/uapi/linux/intel-fpga.h  |  44 +++++
 6 files changed, 578 insertions(+), 2 deletions(-)
 create mode 100644 drivers/fpga/intel/fme-pr.c
 create mode 100644 drivers/fpga/intel/fme.h

diff --git a/drivers/fpga/intel/Makefile b/drivers/fpga/intel/Makefile
index 546861d..0452cb6 100644
--- a/drivers/fpga/intel/Makefile
+++ b/drivers/fpga/intel/Makefile
@@ -2,4 +2,4 @@ obj-$(CONFIG_INTEL_FPGA_PCI) += intel-fpga-pci.o
 obj-$(CONFIG_INTEL_FPGA_FME) += intel-fpga-fme.o
 
 intel-fpga-pci-objs := pcie.o feature-dev.o
-intel-fpga-fme-objs := fme-main.o
+intel-fpga-fme-objs := fme-main.o fme-pr.o
diff --git a/drivers/fpga/intel/feature-dev.h b/drivers/fpga/intel/feature-dev.h
index dccc283..5a25c915 100644
--- a/drivers/fpga/intel/feature-dev.h
+++ b/drivers/fpga/intel/feature-dev.h
@@ -150,8 +150,66 @@ struct feature_fme_err {
 };
 
 /* FME Partial Reconfiguration Sub Feature Register Set */
+/* FME PR Control Register */
+struct feature_fme_pr_ctl {
+	union {
+		u64 csr;
+		struct {
+			u8  pr_reset:1;		/* Reset PR Engine */
+			u8  rsvdz1:3;
+			u8  pr_reset_ack:1;	/* Reset PR Engine Ack */
+			u8  rsvdz2:3;
+			u8  pr_regionid:2;	/* PR Region ID */
+			u8  rsvdz3:2;
+			u8  pr_start_req:1;	/* PR Start Request */
+			u8  pr_push_complete:1;	/* PR Data push complete */
+			u8  pr_kind:1;		/* Load Customer or Intel GBS */
+			u32 rsvdz4:17;
+			u32 config_data;
+		};
+	};
+};
+
+/* FME PR Status Register */
+struct feature_fme_pr_status {
+	union {
+		u64 csr;
+		struct {
+			u16 pr_credit:9;	/* Number of PR Credits */
+			u8  rsvdz1:7;
+			u8  pr_status:1;	/* PR Operation status */
+			u8  rsvdz2:3;
+			u8  pr_ctrlr_status:3;	/* Controller status */
+			u8  rsvdz3:1;
+			u8  pr_host_status:4;	/* PR Host status */
+			u64 rsvdz4:36;
+		};
+	};
+};
+
+/* FME PR Data Register */
+struct feature_fme_pr_data {
+	union {
+		u64 csr;
+		struct {
+			/* PR data from the raw-binary file */
+			u32 pr_data_raw;
+			u32 rsvd;
+		};
+	};
+};
+
 struct feature_fme_pr {
 	struct feature_header header;
+	struct feature_fme_pr_ctl control;
+	struct feature_fme_pr_status status;
+	struct feature_fme_pr_data data;
+	u64 error;
+
+	u64 rsvd[16];
+
+	u64 intfc_id_l;		/* PR interface Id Low */
+	u64 intfc_id_h;		/* PR interface Id High */
 };
 
 /* PORT Header Register Set */
diff --git a/drivers/fpga/intel/fme-main.c b/drivers/fpga/intel/fme-main.c
index 36d0c4c..0d9a7a6 100644
--- a/drivers/fpga/intel/fme-main.c
+++ b/drivers/fpga/intel/fme-main.c
@@ -23,6 +23,7 @@
 #include <linux/intel-fpga.h>
 
 #include "feature-dev.h"
+#include "fme.h"
 
 static ssize_t ports_num_show(struct device *dev,
 			      struct device_attribute *attr, char *buf)
@@ -101,6 +102,10 @@ static struct feature_driver fme_feature_drvs[] = {
 		.ops = &fme_hdr_ops,
 	},
 	{
+		.name = FME_FEATURE_PR_MGMT,
+		.ops = &pr_mgmt_ops,
+	},
+	{
 		.ops = NULL,
 	},
 };
@@ -182,14 +187,48 @@ static const struct file_operations fme_fops = {
 	.unlocked_ioctl = fme_ioctl,
 };
 
+static int fme_dev_init(struct platform_device *pdev)
+{
+	struct feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
+	struct fpga_fme *fme;
+
+	fme = devm_kzalloc(&pdev->dev, sizeof(*fme), GFP_KERNEL);
+	if (!fme)
+		return -ENOMEM;
+
+	fme->pdata = pdata;
+
+	mutex_lock(&pdata->lock);
+	fpga_pdata_set_private(pdata, fme);
+	mutex_unlock(&pdata->lock);
+	return 0;
+}
+
+static void fme_dev_destroy(struct platform_device *pdev)
+{
+	struct feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
+	struct fpga_fme *fme;
+
+	mutex_lock(&pdata->lock);
+	fme = fpga_pdata_get_private(pdata);
+	fpga_pdata_set_private(pdata, NULL);
+	mutex_unlock(&pdata->lock);
+
+	devm_kfree(&pdev->dev, fme);
+}
+
 static int fme_probe(struct platform_device *pdev)
 {
 	int ret;
 
-	ret = fpga_dev_feature_init(pdev, fme_feature_drvs);
+	ret = fme_dev_init(pdev);
 	if (ret)
 		goto exit;
 
+	ret = fpga_dev_feature_init(pdev, fme_feature_drvs);
+	if (ret)
+		goto dev_destroy;
+
 	ret = fpga_register_dev_ops(pdev, &fme_fops, THIS_MODULE);
 	if (ret)
 		goto feature_uinit;
@@ -198,6 +237,8 @@ static int fme_probe(struct platform_device *pdev)
 
 feature_uinit:
 	fpga_dev_feature_uinit(pdev);
+dev_destroy:
+	fme_dev_destroy(pdev);
 exit:
 	return ret;
 }
@@ -206,6 +247,7 @@ static int fme_remove(struct platform_device *pdev)
 {
 	fpga_dev_feature_uinit(pdev);
 	fpga_unregister_dev_ops(pdev);
+	fme_dev_destroy(pdev);
 	return 0;
 }
 
diff --git a/drivers/fpga/intel/fme-pr.c b/drivers/fpga/intel/fme-pr.c
new file mode 100644
index 0000000..3b44a3e
--- /dev/null
+++ b/drivers/fpga/intel/fme-pr.c
@@ -0,0 +1,400 @@
+/*
+ * Driver for Intel FPGA Management Engine (FME) Partial Reconfiguration
+ *
+ * Copyright (C) 2017 Intel Corporation, Inc.
+ *
+ * Authors:
+ *   Kang Luwei <luwei.kang@...el.com>
+ *   Xiao Guangrong <guangrong.xiao@...ux.intel.com>
+ *   Joseph Grecco <joe.grecco@...el.com>
+ *   Enno Luebbers <enno.luebbers@...el.com>
+ *   Tim Whisonant <tim.whisonant@...el.com>
+ *   Ananda Ravuri <ananda.ravuri@...el.com>
+ *   Christopher Rauer <christopher.rauer@...el.com>
+ *   Henry Mitchel <henry.mitchel@...el.com>
+ *
+ * This work is licensed under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license. See the
+ * LICENSE.BSD file under this directory for the BSD license and see
+ * the COPYING file in the top-level directory for the GPLv2 license.
+ */
+
+#include <linux/types.h>
+#include <linux/device.h>
+#include <linux/vmalloc.h>
+#include <linux/uaccess.h>
+#include <linux/fpga/fpga-mgr.h>
+#include <linux/intel-fpga.h>
+
+#include "feature-dev.h"
+#include "fme.h"
+
+#define PR_WAIT_TIMEOUT   8000000
+
+#define PR_HOST_STATUS_IDLE	0
+
+DEFINE_FPGA_PR_ERR_MSG(pr_err_msg);
+
+static ssize_t interface_id_show(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	u64 intfc_id_l, intfc_id_h;
+	struct feature_fme_pr *fme_pr
+		= get_feature_ioaddr_by_index(dev, FME_FEATURE_ID_PR_MGMT);
+
+	intfc_id_l = readq(&fme_pr->intfc_id_l);
+	intfc_id_h = readq(&fme_pr->intfc_id_h);
+
+	return scnprintf(buf, PAGE_SIZE, "%016llx%016llx\n",
+			(unsigned long long)intfc_id_h,
+			(unsigned long long)intfc_id_l);
+}
+static DEVICE_ATTR_RO(interface_id);
+
+static struct attribute *pr_mgmt_attrs[] = {
+	&dev_attr_interface_id.attr,
+	NULL,
+};
+
+struct attribute_group pr_mgmt_attr_group = {
+	.attrs	= pr_mgmt_attrs,
+	.name	= "pr",
+};
+
+static u64
+pr_err_handle(struct platform_device *pdev, struct feature_fme_pr *fme_pr)
+{
+	struct feature_fme_pr_status fme_pr_status;
+	unsigned long err_code;
+	u64 fme_pr_error;
+	int i = 0;
+
+	fme_pr_status.csr = readq(&fme_pr->status);
+	if (!fme_pr_status.pr_status)
+		return 0;
+
+	err_code = fme_pr_error = readq(&fme_pr->error);
+	for_each_set_bit(i, &err_code, PR_MAX_ERR_NUM)
+		dev_dbg(&pdev->dev, "%s\n", pr_err_msg[i]);
+	writeq(fme_pr_error, &fme_pr->error);
+	return fme_pr_error;
+}
+
+static int fme_pr_write_init(struct fpga_manager *mgr,
+		struct fpga_image_info *info, const char *buf, size_t count)
+{
+	struct fpga_fme *fme = mgr->priv;
+	struct platform_device *pdev;
+	struct feature_fme_pr *fme_pr;
+	struct feature_fme_pr_ctl fme_pr_ctl;
+	struct feature_fme_pr_status fme_pr_status;
+
+	pdev = fme->pdata->dev;
+	fme_pr = get_feature_ioaddr_by_index(&pdev->dev,
+				FME_FEATURE_ID_PR_MGMT);
+	if (!fme_pr)
+		return -EINVAL;
+
+	if (WARN_ON(info->flags != FPGA_MGR_PARTIAL_RECONFIG))
+		return -EINVAL;
+
+	dev_dbg(&pdev->dev, "resetting PR before initiated PR\n");
+
+	fme_pr_ctl.csr = readq(&fme_pr->control);
+	fme_pr_ctl.pr_reset = 1;
+	writeq(fme_pr_ctl.csr, &fme_pr->control);
+
+	fme_pr_ctl.pr_reset_ack = 1;
+
+	if (fpga_wait_register_field(pr_reset_ack, fme_pr_ctl,
+				     &fme_pr->control, PR_WAIT_TIMEOUT, 1)) {
+		dev_err(&pdev->dev, "maximum PR timeout\n");
+		return -ETIMEDOUT;
+	}
+
+	fme_pr_ctl.csr = readq(&fme_pr->control);
+	fme_pr_ctl.pr_reset = 0;
+	writeq(fme_pr_ctl.csr, &fme_pr->control);
+
+	dev_dbg(&pdev->dev,
+		"waiting for PR resource in HW to be initialized and ready\n");
+
+	fme_pr_status.pr_host_status = PR_HOST_STATUS_IDLE;
+
+	if (fpga_wait_register_field(pr_host_status, fme_pr_status,
+				     &fme_pr->status, PR_WAIT_TIMEOUT, 1)) {
+		dev_err(&pdev->dev, "maximum PR timeout\n");
+		return -ETIMEDOUT;
+	}
+
+	dev_dbg(&pdev->dev, "check if have any previous PR error\n");
+	pr_err_handle(pdev, fme_pr);
+	return 0;
+}
+
+static int fme_pr_write(struct fpga_manager *mgr,
+			const char *buf, size_t count)
+{
+	struct fpga_fme *fme = mgr->priv;
+	struct platform_device *pdev;
+	struct feature_fme_pr *fme_pr;
+	struct feature_fme_pr_ctl fme_pr_ctl;
+	struct feature_fme_pr_status fme_pr_status;
+	struct feature_fme_pr_data fme_pr_data;
+	int delay, pr_credit, i = 0;
+
+	pdev = fme->pdata->dev;
+	fme_pr = get_feature_ioaddr_by_index(&pdev->dev,
+				FME_FEATURE_ID_PR_MGMT);
+
+	dev_dbg(&pdev->dev, "set PR port ID and start request\n");
+
+	fme_pr_ctl.csr = readq(&fme_pr->control);
+	fme_pr_ctl.pr_regionid = fme->port_id;
+	fme_pr_ctl.pr_start_req = 1;
+	writeq(fme_pr_ctl.csr, &fme_pr->control);
+
+	dev_dbg(&pdev->dev, "pushing data from bitstream to HW\n");
+
+	fme_pr_status.csr = readq(&fme_pr->status);
+	pr_credit = fme_pr_status.pr_credit;
+
+	while (count > 0) {
+		delay = 0;
+		while (pr_credit <= 1) {
+			if (delay++ > PR_WAIT_TIMEOUT) {
+				dev_err(&pdev->dev, "maximum try\n");
+				return -ETIMEDOUT;
+			}
+			udelay(1);
+
+			fme_pr_status.csr = readq(&fme_pr->status);
+			pr_credit = fme_pr_status.pr_credit;
+		};
+
+		if (count >= 4) {
+			fme_pr_data.rsvd = 0;
+			fme_pr_data.pr_data_raw = *(((u32 *)buf) + i);
+			writeq(fme_pr_data.csr, &fme_pr->data);
+			count -= 4;
+			pr_credit--;
+			i++;
+		} else {
+			WARN_ON(1);
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static int fme_pr_write_complete(struct fpga_manager *mgr,
+			struct fpga_image_info *info)
+{
+	struct fpga_fme *fme = mgr->priv;
+	struct platform_device *pdev;
+	struct feature_fme_pr *fme_pr;
+	struct feature_fme_pr_ctl fme_pr_ctl;
+
+	pdev = fme->pdata->dev;
+	fme_pr = get_feature_ioaddr_by_index(&pdev->dev,
+				FME_FEATURE_ID_PR_MGMT);
+
+	fme_pr_ctl.csr = readq(&fme_pr->control);
+	fme_pr_ctl.pr_push_complete = 1;
+	writeq(fme_pr_ctl.csr, &fme_pr->control);
+
+	dev_dbg(&pdev->dev, "green bitstream push complete\n");
+	dev_dbg(&pdev->dev, "waiting for HW to release PR resource\n");
+
+	fme_pr_ctl.pr_start_req = 0;
+
+	if (fpga_wait_register_field(pr_start_req, fme_pr_ctl,
+				     &fme_pr->control, PR_WAIT_TIMEOUT, 1)) {
+		dev_err(&pdev->dev, "maximum try.\n");
+		return -ETIMEDOUT;
+	}
+
+	dev_dbg(&pdev->dev, "PR operation complete, checking status\n");
+	fme->pr_err = pr_err_handle(pdev, fme_pr);
+	if (fme->pr_err)
+		return -EIO;
+
+	dev_dbg(&pdev->dev, "PR done successfully\n");
+	return 0;
+}
+
+static enum fpga_mgr_states fme_pr_state(struct fpga_manager *mgr)
+{
+	return FPGA_MGR_STATE_UNKNOWN;
+}
+
+static const struct fpga_manager_ops fme_pr_ops = {
+	.write_init = fme_pr_write_init,
+	.write = fme_pr_write,
+	.write_complete = fme_pr_write_complete,
+	.state = fme_pr_state,
+};
+
+static int fme_pr(struct platform_device *pdev, unsigned long arg)
+{
+	void __user *argp = (void __user *)arg;
+	struct feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
+	struct fpga_fme *fme;
+	struct fpga_manager *mgr;
+	struct feature_fme_header *fme_hdr;
+	struct feature_fme_capability fme_capability;
+	struct fpga_image_info info;
+	struct fpga_fme_port_pr port_pr;
+	struct platform_device *port;
+	unsigned long minsz;
+	void *buf = NULL;
+	int ret = 0;
+
+	minsz = offsetofend(struct fpga_fme_port_pr, status);
+
+	if (copy_from_user(&port_pr, argp, minsz))
+		return -EFAULT;
+
+	if (port_pr.argsz < minsz || port_pr.flags)
+		return -EINVAL;
+
+	if (!IS_ALIGNED(port_pr.buffer_size, 4))
+		return -EINVAL;
+
+	/* get fme header region */
+	fme_hdr = get_feature_ioaddr_by_index(&pdev->dev,
+					FME_FEATURE_ID_HEADER);
+	if (WARN_ON(!fme_hdr))
+		return -EINVAL;
+
+	/* check port id */
+	fme_capability.csr = readq(&fme_hdr->capability);
+	if (port_pr.port_id >= fme_capability.num_ports) {
+		dev_dbg(&pdev->dev, "port number more than maximum\n");
+		return -EINVAL;
+	}
+
+	if (!access_ok(VERIFY_READ, port_pr.buffer_address,
+				    port_pr.buffer_size))
+		return -EFAULT;
+
+	buf = vmalloc(port_pr.buffer_size);
+	if (!buf)
+		return -ENOMEM;
+
+	if (copy_from_user(buf, (void __user *)port_pr.buffer_address,
+					       port_pr.buffer_size)) {
+		ret = -EFAULT;
+		goto free_exit;
+	}
+
+	memset(&info, 0, sizeof(struct fpga_image_info));
+	info.flags = FPGA_MGR_PARTIAL_RECONFIG;
+
+	mgr = fpga_mgr_get(&pdev->dev);
+	if (IS_ERR(mgr)) {
+		ret = PTR_ERR(mgr);
+		goto free_exit;
+	}
+
+	mutex_lock(&pdata->lock);
+	fme = fpga_pdata_get_private(pdata);
+	/* fme device has been unregistered. */
+	if (!fme) {
+		ret = -EINVAL;
+		goto unlock_exit;
+	}
+
+	fme->pr_err = 0;
+	fme->port_id = port_pr.port_id;
+
+	/* Find and get port device by index */
+	port = pdata->fpga_for_each_port(pdev, &fme->port_id,
+					 fpga_port_check_id);
+	WARN_ON(!port);
+
+	/* Disable Port before PR */
+	fpga_port_disable(port);
+
+	ret = fpga_mgr_buf_load(mgr, &info, buf, port_pr.buffer_size);
+	port_pr.status = fme->pr_err;
+
+	/* Re-enable Port after PR finished */
+	fpga_port_enable(port);
+
+	put_device(&port->dev);
+
+unlock_exit:
+	mutex_unlock(&pdata->lock);
+	fpga_mgr_put(mgr);
+free_exit:
+	vfree(buf);
+	if (copy_to_user((void __user *)arg, &port_pr, minsz))
+		return -EFAULT;
+	return ret;
+}
+
+static int fpga_fme_pr_probe(struct platform_device *pdev)
+{
+	struct feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
+	struct fpga_fme *priv;
+	int ret;
+
+	mutex_lock(&pdata->lock);
+	priv = fpga_pdata_get_private(pdata);
+	ret = fpga_mgr_register(&pdata->dev->dev,
+		"Intel FPGA Manager", &fme_pr_ops, priv);
+	mutex_unlock(&pdata->lock);
+
+	return ret;
+}
+
+static int fpga_fme_pr_remove(struct platform_device *pdev)
+{
+	fpga_mgr_unregister(&pdev->dev);
+	return 0;
+}
+
+static int pr_mgmt_init(struct platform_device *pdev, struct feature *feature)
+{
+	int ret;
+
+	ret = fpga_fme_pr_probe(pdev);
+	if (ret)
+		return ret;
+
+	ret = sysfs_create_group(&pdev->dev.kobj, &pr_mgmt_attr_group);
+	if (ret)
+		fpga_fme_pr_remove(pdev);
+
+	return ret;
+}
+
+static void pr_mgmt_uinit(struct platform_device *pdev, struct feature *feature)
+{
+	sysfs_remove_group(&pdev->dev.kobj, &pr_mgmt_attr_group);
+	fpga_fme_pr_remove(pdev);
+}
+
+static long fme_pr_ioctl(struct platform_device *pdev, struct feature *feature,
+	unsigned int cmd, unsigned long arg)
+{
+	long ret;
+
+	switch (cmd) {
+	case FPGA_FME_PORT_PR:
+		ret = fme_pr(pdev, arg);
+		break;
+	default:
+		ret = -ENODEV;
+	}
+
+	return ret;
+}
+
+struct feature_ops pr_mgmt_ops = {
+	.init = pr_mgmt_init,
+	.uinit = pr_mgmt_uinit,
+	.ioctl = fme_pr_ioctl,
+};
diff --git a/drivers/fpga/intel/fme.h b/drivers/fpga/intel/fme.h
new file mode 100644
index 0000000..d6cb7ce
--- /dev/null
+++ b/drivers/fpga/intel/fme.h
@@ -0,0 +1,32 @@
+/*
+ * Header file for Intel FPGA Management Engine (FME) Driver
+ *
+ * Copyright (C) 2017 Intel Corporation, Inc.
+ *
+ * Authors:
+ *   Kang Luwei <luwei.kang@...el.com>
+ *   Xiao Guangrong <guangrong.xiao@...ux.intel.com>
+ *   Joseph Grecco <joe.grecco@...el.com>
+ *   Enno Luebbers <enno.luebbers@...el.com>
+ *   Tim Whisonant <tim.whisonant@...el.com>
+ *   Ananda Ravuri <ananda.ravuri@...el.com>
+ *   Henry Mitchel <henry.mitchel@...el.com>
+ *
+ * This work is licensed under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license. See the
+ * LICENSE.BSD file under this directory for the BSD license and see
+ * the COPYING file in the top-level directory for the GPLv2 license.
+ */
+
+#ifndef __INTEL_FME_H
+#define __INTEL_FME_H
+
+struct fpga_fme {
+	u8  port_id;
+	u64 pr_err;
+	struct feature_platform_data *pdata;
+};
+
+extern struct feature_ops pr_mgmt_ops;
+
+#endif
diff --git a/include/uapi/linux/intel-fpga.h b/include/uapi/linux/intel-fpga.h
index 992e556..77658316 100644
--- a/include/uapi/linux/intel-fpga.h
+++ b/include/uapi/linux/intel-fpga.h
@@ -18,6 +18,8 @@
 #ifndef _UAPI_LINUX_INTEL_FPGA_H
 #define _UAPI_LINUX_INTEL_FPGA_H
 
+#include <linux/types.h>
+
 #define FPGA_API_VERSION 0
 
 /*
@@ -30,6 +32,7 @@
 #define FPGA_MAGIC 0xB6
 
 #define FPGA_BASE 0
+#define FME_BASE 0x80
 
 /**
  * FPGA_GET_API_VERSION - _IO(FPGA_MAGIC, FPGA_BASE + 0)
@@ -49,4 +52,45 @@
 
 #define FPGA_CHECK_EXTENSION	_IO(FPGA_MAGIC, FPGA_BASE + 1)
 
+/* IOCTLs for FME file descriptor */
+
+/**
+ * FPGA_FME_PORT_PR - _IOWR(FPGA_MAGIC, FME_BASE + 0, struct fpga_fme_port_pr)
+ *
+ * Driver does Partial Reconfiguration based on Port ID and Buffer (Image)
+ * provided by caller.
+ * Return: 0 on success, -errno on failure.
+ * If FPGA_FME_PORT_PR returns -EIO, that indicates the HW has detected
+ * some errors during PR, under this case, the user can fetch HW error code
+ * from fpga_fme_port_pr.status. Each bit on the error code is used as the
+ * index for the array created by DEFINE_FPGA_PR_ERR_MSG().
+ * Otherwise, it is always zero.
+ */
+
+#define DEFINE_FPGA_PR_ERR_MSG(_name_)			\
+static const char * const _name_[] = {			\
+	"PR operation error detected",			\
+	"PR CRC error detected",			\
+	"PR incompatiable bitstream error detected",	\
+	"PR IP protocol error detected",		\
+	"PR FIFO overflow error detected",		\
+	"Reserved",					\
+	"PR secure load error detected",		\
+}
+
+#define PR_MAX_ERR_NUM	7
+
+struct fpga_fme_port_pr {
+	/* Input */
+	__u32 argsz;		/* Structure length */
+	__u32 flags;		/* Zero for now */
+	__u32 port_id;
+	__u32 buffer_size;
+	__u64 buffer_address;	/* Userspace address to the buffer for PR */
+	/* Output */
+	__u64 status;		/* HW error code if ioctl returns -EIO */
+};
+
+#define FPGA_FME_PORT_PR	_IO(FPGA_MAGIC, FME_BASE + 0)
+
 #endif /* _UAPI_INTEL_FPGA_H */
-- 
2.7.4

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